d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
fa913fbd87
freebsd-dev/sys/dev/aic7xxx/aic7xxx.seq

1132 lines
33 KiB
Plaintext
Raw Normal View History

The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*+M***********************************************************************
*Adaptec 274x/284x/294x device driver for Linux and FreeBSD.
*
*Copyright (c) 1994 John Aycock
* The University of Calgary Department of Computer Science.
* All rights reserved.
*
*Modifications/enhancements:
* Copyright (c) 1994, 1995 Justin Gibbs. All rights reserved.
*
*Redistribution and use in source and binary forms, with or without
*modification, are permitted provided that the following conditions
*are met:
*1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer.
*2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of Calgary
* Department of Computer Science and its contributors.
*4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
*THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
*ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
*IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
*ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
*FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
*DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
*OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
*HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
*LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
*OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
*SUCH DAMAGE.
*
*FreeBSD, Twin, Wide, 2 command per target support, tagged queuing and other
*optimizations provided by Justin T. Gibbs (gibbs@FreeBSD.org)
*
*-M************************************************************************/
aic7xxx.seq: Add the same type of safeguards we use in the mesg_in phase to the mesg_out phase. aic7xxx_reg.h: Add definitions for the DSCommand register for PCI adapters.
1996-01-07 19:18:28 +00:00
VERSION AIC7XXX_SEQ_VER "$Id: aic7xxx.seq,v 1.26 1996/01/05 16:11:49 gibbs Exp $"
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
#include "../../dev/aic7xxx/aic7xxx_reg.h"
/*
* We can't just use ACCUM in the sequencer code because it
* must be treated specially by the assembler, and it currently
* looks for the symbol 'A'. This is the only register defined
* the assembler's symbol space.
*/
A = ACCUM
/* After starting the selection hardware, we return to the "poll_for_work"
* loop so that we can check for reconnecting targets as well as for our
* selection to complete just in case the reselection wins bus arbitration.
* The problem with this is that we must keep track of the SCB that we've
* already pulled from the QINFIFO and started the selection on just in case
* the reselection wins so that we can retry the selection at a later time.
* This problem cannot be resolved by holding a single entry in scratch
* ram since a reconnecting target can request sense and this will create
* yet another SCB waiting for selection. The solution used here is to
* use byte 31 of the SCB as a psuedo-next pointer and to thread a list
* of SCBs that are awaiting selection. Since 0-0xfe are valid SCB offsets,
* SCB_LIST_NULL is 0xff which is out of range. The kernel driver must
* add an entry to this list everytime a request sense occurs. The sequencer
* will automatically consume the entries.
*/
/*
* Initialize any state idle loop state here. This code is executed on
* startup and after every bus free.
*/
start:
mvi SCSISEQ,ENRSELI /* Always allow reselection */
Restructure the arbitration loop to allow for reselections that win out over the adapter's selections. Many fast periferals were getting upset when the sequencer decided to rearbitrate after the device had already won arbitration. This also forced the creation of a list threaded through the SCBs (since we don't have enough space anywhere else) of commands that are awaiting reselection. This list is run down before any new transactions from the input queue are allowed. The list is appened to whenever we begin a selection (simple case since the selecting device is always at the head) and by the kernel driver whenever a request sense occurs. In the common case, the list is only one element long, but when a reselection wins out over a selection and that reselection generates a request sense, the outstanding selection required for the retreval of the sense code grows the list. On machines with many targets, this might cause the list to grow large, so this solution, which will allow up to the maximum number of I/O requests capible of the card elements in the list, was chosen. The list manipulation is trivial and adds three sequencer instructions of overhead to the selection phase. This fixes the "target busy" errors from micropolis drives and the bursty I/O problem when performing I/O between a Quantum Grand Prix and any other device. I anticipate that this will correct many of the problems that have been reported with this driver. Reviewed by: Wcarchive and David Greenman
1995-04-27 17:44:27 +00:00
poll_for_work:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Are we a twin channel device?
* For fairness, we check the other bus first,
* since we just finished a transaction on the
* current channel.
*/
test FLAGS,TWIN_BUS jz start2
xor SBLKCTL,SELBUSB /* Toggle to the other bus */
Restructure the arbitration loop to allow for reselections that win out over the adapter's selections. Many fast periferals were getting upset when the sequencer decided to rearbitrate after the device had already won arbitration. This also forced the creation of a list threaded through the SCBs (since we don't have enough space anywhere else) of commands that are awaiting reselection. This list is run down before any new transactions from the input queue are allowed. The list is appened to whenever we begin a selection (simple case since the selecting device is always at the head) and by the kernel driver whenever a request sense occurs. In the common case, the list is only one element long, but when a reselection wins out over a selection and that reselection generates a request sense, the outstanding selection required for the retreval of the sense code grows the list. On machines with many targets, this might cause the list to grow large, so this solution, which will allow up to the maximum number of I/O requests capible of the card elements in the list, was chosen. The list manipulation is trivial and adds three sequencer instructions of overhead to the selection phase. This fixes the "target busy" errors from micropolis drives and the bursty I/O problem when performing I/O between a Quantum Grand Prix and any other device. I anticipate that this will correct many of the problems that have been reported with this driver. Reviewed by: Wcarchive and David Greenman
1995-04-27 17:44:27 +00:00
test SSTAT0,SELDI jnz reselect
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
xor SBLKCTL,SELBUSB /* Toggle to the original bus */
Update the sequencer code to handle both channels of Twin channel devices. You can now sling 14 devices off of a 274xT. In the process of adding twin channel support, I removed all evident restrictions on supporting Wide channeled devices, but I do not have a Wide controller to test them on. aic7770_seq.h, the pre-compiled header, is no longer needed since config handles this dependancy.
1994-12-31 19:26:54 +00:00
start2:
Restructure the arbitration loop to allow for reselections that win out over the adapter's selections. Many fast periferals were getting upset when the sequencer decided to rearbitrate after the device had already won arbitration. This also forced the creation of a list threaded through the SCBs (since we don't have enough space anywhere else) of commands that are awaiting reselection. This list is run down before any new transactions from the input queue are allowed. The list is appened to whenever we begin a selection (simple case since the selecting device is always at the head) and by the kernel driver whenever a request sense occurs. In the common case, the list is only one element long, but when a reselection wins out over a selection and that reselection generates a request sense, the outstanding selection required for the retreval of the sense code grows the list. On machines with many targets, this might cause the list to grow large, so this solution, which will allow up to the maximum number of I/O requests capible of the card elements in the list, was chosen. The list manipulation is trivial and adds three sequencer instructions of overhead to the selection phase. This fixes the "target busy" errors from micropolis drives and the bursty I/O problem when performing I/O between a Quantum Grand Prix and any other device. I anticipate that this will correct many of the problems that have been reported with this driver. Reviewed by: Wcarchive and David Greenman
1995-04-27 17:44:27 +00:00
test SSTAT0,SELDI jnz reselect
Change SCB_LIST_NULL to 0xff from 0x10 to allow for 255 commands. This is needed for 3940 support. Have tagged commands look to see if a target is "busy" with a non tagged command before executing. This prevents overlapped tagged and non tagged commands which can happen since request sense commands are not tagged.
1995-07-04 20:58:57 +00:00
cmp WAITING_SCBH,SCB_LIST_NULL jne start_waiting
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test QINCNT,0xff jz poll_for_work
/* We have at least one queued SCB now and we don't have any
* SCBs in the list of SCBs awaiting selection. Set the SCB
* pointer from the FIFO so we see the right bank of SCB
* registers.
*/
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
mov SCBPTR,QINFIFO
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* If the control byte of this SCB has the NEEDDMA flag set, we have
* yet to DMA it from host memory
*/
At $Ids to all files. Have the sequencer use DMA to tranfer its SCB (SCSI control block) instead of having the host PIO it down. Also reimplement WDTR and SDTR optimization to remove code in the sequencer and place the responsibility of knowing when to initiate SDTR or WDTR on the kernel driver. This vastly shortens the sequencer program yet yeilds the same performance.
1995-01-16 16:31:21 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test SCB_CONTROL,NEEDDMA jz test_busy
clr HCNT2
clr HCNT1
mvi HCNT0,SCB_SIZEOF
At $Ids to all files. Have the sequencer use DMA to tranfer its SCB (SCSI control block) instead of having the host PIO it down. Also reimplement WDTR and SDTR optimization to remove code in the sequencer and place the responsibility of knowing when to initiate SDTR or WDTR on the kernel driver. This vastly shortens the sequencer program yet yeilds the same performance.
1995-01-16 16:31:21 +00:00
Restructure the arbitration loop to allow for reselections that win out over the adapter's selections. Many fast periferals were getting upset when the sequencer decided to rearbitrate after the device had already won arbitration. This also forced the creation of a list threaded through the SCBs (since we don't have enough space anywhere else) of commands that are awaiting reselection. This list is run down before any new transactions from the input queue are allowed. The list is appened to whenever we begin a selection (simple case since the selecting device is always at the head) and by the kernel driver whenever a request sense occurs. In the common case, the list is only one element long, but when a reselection wins out over a selection and that reselection generates a request sense, the outstanding selection required for the retreval of the sense code grows the list. On machines with many targets, this might cause the list to grow large, so this solution, which will allow up to the maximum number of I/O requests capible of the card elements in the list, was chosen. The list manipulation is trivial and adds three sequencer instructions of overhead to the selection phase. This fixes the "target busy" errors from micropolis drives and the bursty I/O problem when performing I/O between a Quantum Grand Prix and any other device. I anticipate that this will correct many of the problems that have been reported with this driver. Reviewed by: Wcarchive and David Greenman
1995-04-27 17:44:27 +00:00
mvi DINDEX,HADDR
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi SCB_PHYSADDR call bcopy_4
Restructure the arbitration loop to allow for reselections that win out over the adapter's selections. Many fast periferals were getting upset when the sequencer decided to rearbitrate after the device had already won arbitration. This also forced the creation of a list threaded through the SCBs (since we don't have enough space anywhere else) of commands that are awaiting reselection. This list is run down before any new transactions from the input queue are allowed. The list is appened to whenever we begin a selection (simple case since the selecting device is always at the head) and by the kernel driver whenever a request sense occurs. In the common case, the list is only one element long, but when a reselection wins out over a selection and that reselection generates a request sense, the outstanding selection required for the retreval of the sense code grows the list. On machines with many targets, this might cause the list to grow large, so this solution, which will allow up to the maximum number of I/O requests capible of the card elements in the list, was chosen. The list manipulation is trivial and adds three sequencer instructions of overhead to the selection phase. This fixes the "target busy" errors from micropolis drives and the bursty I/O problem when performing I/O between a Quantum Grand Prix and any other device. I anticipate that this will correct many of the problems that have been reported with this driver. Reviewed by: Wcarchive and David Greenman
1995-04-27 17:44:27 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi DFCNTRL,0xd /* HDMAEN|DIRECTION|FIFORESET */
At $Ids to all files. Have the sequencer use DMA to tranfer its SCB (SCSI control block) instead of having the host PIO it down. Also reimplement WDTR and SDTR optimization to remove code in the sequencer and place the responsibility of knowing when to initiate SDTR or WDTR on the kernel driver. This vastly shortens the sequencer program yet yeilds the same performance.
1995-01-16 16:31:21 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Wait for DMA from host memory to data FIFO to complete, then disable
* DMA and wait for it to acknowledge that it's off.
*/
Major overhaul of the aic7xxx driver: - Report valid residual byte counts. We actually pause the sequencer when the residual is non-zero. I thought about using DMA to do this, bus sequencer program space is tight. - Fix embarassing off by one error in the computation of a 2's compliment variable. This was most likely the cause of the many problems reported with the tagged queuing code. - Handle "MAX_SYNC" as a special case (ie we are the ones starting the sync negotiation sequence). This was done so that the target scratch area can be initialed to 0 offset (asyncronous transfers) safely. The initialization to 0 (was 15) is necessary since in some cases a Wide negotiation could run into problems if SCSIRATE was set wrong and we went into data(in/out). - Trim the DMA routines a little by using some procedures. Net effect is more functionality with 3 less instructions after this update. - Toggle the WIDEODD bit of the DFCNTRL whenever this is not the last SG block. It has no effect in the 8bit bus configuration, but in the Wide configuration ensures that the overlap byte is held in the SCSI block if the transfer is odd so it will end up in the next SG (the correct behavior).
1995-03-31 14:06:02 +00:00
call dma_finish
At $Ids to all files. Have the sequencer use DMA to tranfer its SCB (SCSI control block) instead of having the host PIO it down. Also reimplement WDTR and SDTR optimization to remove code in the sequencer and place the responsibility of knowing when to initiate SDTR or WDTR on the kernel driver. This vastly shortens the sequencer program yet yeilds the same performance.
1995-01-16 16:31:21 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/* Copy the SCB from the FIFO to the SCBARRAY */
At $Ids to all files. Have the sequencer use DMA to tranfer its SCB (SCSI control block) instead of having the host PIO it down. Also reimplement WDTR and SDTR optimization to remove code in the sequencer and place the responsibility of knowing when to initiate SDTR or WDTR on the kernel driver. This vastly shortens the sequencer program yet yeilds the same performance.
1995-01-16 16:31:21 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi DINDEX, SCBARRAY
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
call bcopy_5_dfdat
call bcopy_7_dfdat
call bcopy_7_dfdat
call bcopy_7_dfdat
Restructure the arbitration loop to allow for reselections that win out over the adapter's selections. Many fast periferals were getting upset when the sequencer decided to rearbitrate after the device had already won arbitration. This also forced the creation of a list threaded through the SCBs (since we don't have enough space anywhere else) of commands that are awaiting reselection. This list is run down before any new transactions from the input queue are allowed. The list is appened to whenever we begin a selection (simple case since the selecting device is always at the head) and by the kernel driver whenever a request sense occurs. In the common case, the list is only one element long, but when a reselection wins out over a selection and that reselection generates a request sense, the outstanding selection required for the retreval of the sense code grows the list. On machines with many targets, this might cause the list to grow large, so this solution, which will allow up to the maximum number of I/O requests capible of the card elements in the list, was chosen. The list manipulation is trivial and adds three sequencer instructions of overhead to the selection phase. This fixes the "target busy" errors from micropolis drives and the bursty I/O problem when performing I/O between a Quantum Grand Prix and any other device. I anticipate that this will correct many of the problems that have been reported with this driver. Reviewed by: Wcarchive and David Greenman
1995-04-27 17:44:27 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* See if there is not already an active SCB for this target. This code
* locks out on a per target basis instead of target/lun. Although this
* is not ideal for devices that have multiple luns active at the same
* time, it is faster than looping through all SCB's looking for active
* commands. It may be benificial to make findscb a more general procedure
* to see if the added cost of the search is negligible. This code also
* assumes that the kernel driver will clear the active flags on board
* initialization, board reset, and a target SELTO. Tagged commands
* don't set the active bits since you can have more than queue more
* than one command at a time. We do, however, look to see if there
* are any non-tagged I/Os in progress, and requeue the command if
* there are. Tagged and non-tagged commands cannot be mixed to a
* single target.
*/
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
At $Ids to all files. Have the sequencer use DMA to tranfer its SCB (SCSI control block) instead of having the host PIO it down. Also reimplement WDTR and SDTR optimization to remove code in the sequencer and place the responsibility of knowing when to initiate SDTR or WDTR on the kernel driver. This vastly shortens the sequencer program yet yeilds the same performance.
1995-01-16 16:31:21 +00:00
test_busy:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mov FUNCTION1,SCB_TCL
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
mov A,FUNCTION1
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test SCB_TCL,0x88 jz test_a /* Id < 8 && A channel */
Update the sequencer code to handle both channels of Twin channel devices. You can now sling 14 devices off of a 274xT. In the process of adding twin channel support, I removed all evident restrictions on supporting Wide channeled devices, but I do not have a Wide controller to test them on. aic7770_seq.h, the pre-compiled header, is no longer needed since config handles this dependancy.
1994-12-31 19:26:54 +00:00
test ACTIVE_B,A jnz requeue
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test SCB_CONTROL,TAG_ENB jnz start_scb
/* Mark the current target as busy */
or ACTIVE_B,A
Update the sequencer code to handle both channels of Twin channel devices. You can now sling 14 devices off of a 274xT. In the process of adding twin channel support, I removed all evident restrictions on supporting Wide channeled devices, but I do not have a Wide controller to test them on. aic7770_seq.h, the pre-compiled header, is no longer needed since config handles this dependancy.
1994-12-31 19:26:54 +00:00
jmp start_scb
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/* Place the currently active SCB back on the queue for later processing */
Update the sequencer code to handle both channels of Twin channel devices. You can now sling 14 devices off of a 274xT. In the process of adding twin channel support, I removed all evident restrictions on supporting Wide channeled devices, but I do not have a Wide controller to test them on. aic7770_seq.h, the pre-compiled header, is no longer needed since config handles this dependancy.
1994-12-31 19:26:54 +00:00
requeue:
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
mov QINFIFO, SCBPTR
Restructure the arbitration loop to allow for reselections that win out over the adapter's selections. Many fast periferals were getting upset when the sequencer decided to rearbitrate after the device had already won arbitration. This also forced the creation of a list threaded through the SCBs (since we don't have enough space anywhere else) of commands that are awaiting reselection. This list is run down before any new transactions from the input queue are allowed. The list is appened to whenever we begin a selection (simple case since the selecting device is always at the head) and by the kernel driver whenever a request sense occurs. In the common case, the list is only one element long, but when a reselection wins out over a selection and that reselection generates a request sense, the outstanding selection required for the retreval of the sense code grows the list. On machines with many targets, this might cause the list to grow large, so this solution, which will allow up to the maximum number of I/O requests capible of the card elements in the list, was chosen. The list manipulation is trivial and adds three sequencer instructions of overhead to the selection phase. This fixes the "target busy" errors from micropolis drives and the bursty I/O problem when performing I/O between a Quantum Grand Prix and any other device. I anticipate that this will correct many of the problems that have been reported with this driver. Reviewed by: Wcarchive and David Greenman
1995-04-27 17:44:27 +00:00
jmp poll_for_work
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Pull the first entry off of the waiting for selection list
* We don't have to "test_busy" because only transactions that
* have passed that test can be in the waiting_scb list.
*/
Restructure the arbitration loop to allow for reselections that win out over the adapter's selections. Many fast periferals were getting upset when the sequencer decided to rearbitrate after the device had already won arbitration. This also forced the creation of a list threaded through the SCBs (since we don't have enough space anywhere else) of commands that are awaiting reselection. This list is run down before any new transactions from the input queue are allowed. The list is appened to whenever we begin a selection (simple case since the selecting device is always at the head) and by the kernel driver whenever a request sense occurs. In the common case, the list is only one element long, but when a reselection wins out over a selection and that reselection generates a request sense, the outstanding selection required for the retreval of the sense code grows the list. On machines with many targets, this might cause the list to grow large, so this solution, which will allow up to the maximum number of I/O requests capible of the card elements in the list, was chosen. The list manipulation is trivial and adds three sequencer instructions of overhead to the selection phase. This fixes the "target busy" errors from micropolis drives and the bursty I/O problem when performing I/O between a Quantum Grand Prix and any other device. I anticipate that this will correct many of the problems that have been reported with this driver. Reviewed by: Wcarchive and David Greenman
1995-04-27 17:44:27 +00:00
start_waiting:
mov SCBPTR,WAITING_SCBH
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
jmp start_scb2
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
Update the sequencer code to handle both channels of Twin channel devices. You can now sling 14 devices off of a 274xT. In the process of adding twin channel support, I removed all evident restrictions on supporting Wide channeled devices, but I do not have a Wide controller to test them on. aic7770_seq.h, the pre-compiled header, is no longer needed since config handles this dependancy.
1994-12-31 19:26:54 +00:00
test_a:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test ACTIVE_A,A jnz requeue
test SCB_CONTROL,TAG_ENB jnz start_scb
/* Mark the current target as busy */
or ACTIVE_A,A
Update the sequencer code to handle both channels of Twin channel devices. You can now sling 14 devices off of a 274xT. In the process of adding twin channel support, I removed all evident restrictions on supporting Wide channeled devices, but I do not have a Wide controller to test them on. aic7770_seq.h, the pre-compiled header, is no longer needed since config handles this dependancy.
1994-12-31 19:26:54 +00:00
start_scb:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mov SCB_NEXT_WAITING,WAITING_SCBH
Restructure the arbitration loop to allow for reselections that win out over the adapter's selections. Many fast periferals were getting upset when the sequencer decided to rearbitrate after the device had already won arbitration. This also forced the creation of a list threaded through the SCBs (since we don't have enough space anywhere else) of commands that are awaiting reselection. This list is run down before any new transactions from the input queue are allowed. The list is appened to whenever we begin a selection (simple case since the selecting device is always at the head) and by the kernel driver whenever a request sense occurs. In the common case, the list is only one element long, but when a reselection wins out over a selection and that reselection generates a request sense, the outstanding selection required for the retreval of the sense code grows the list. On machines with many targets, this might cause the list to grow large, so this solution, which will allow up to the maximum number of I/O requests capible of the card elements in the list, was chosen. The list manipulation is trivial and adds three sequencer instructions of overhead to the selection phase. This fixes the "target busy" errors from micropolis drives and the bursty I/O problem when performing I/O between a Quantum Grand Prix and any other device. I anticipate that this will correct many of the problems that have been reported with this driver. Reviewed by: Wcarchive and David Greenman
1995-04-27 17:44:27 +00:00
mov WAITING_SCBH, SCBPTR
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
start_scb2:
and SINDEX,0xf7,SBLKCTL /* Clear the channel select bit */
and A,0x08,SCB_TCL /* Get new channel bit */
or SINDEX,A
mov SBLKCTL,SINDEX /* select channel */
mov SCB_TCL call initialize_scsiid
/*
* Enable selection phase as an initiator, and do automatic ATN
* after the selection. We do this now so that we can overlap the
* rest of our work to set up this target with the arbitration and
* selection bus phases.
*/
start_selection:
mvi SCSISEQ,0x58 /* ENSELO|ENAUTOATNO|ENRSELI */
/*
* As soon as we get a successful selection, the target should go
* into the message out phase since we have ATN asserted. Prepare
* the message to send.
*
* Messages are stored in scratch RAM starting with a length byte
* followed by the message itself.
*/
test SCB_CMDLEN,0xff jnz mk_identify /* 0 Length Command? */
/*
* The kernel has sent us an SCB with no command attached. This implies
* that the kernel wants to send a message of some sort to this target,
* so we interrupt the driver, allow it to fill the message buffer, and
* then go back into the arbitration loop
*/
Fixes to the aic7xxx sequencer code and device driver from Justin Gibbs: 1) If a target initiated a sync negotiation with us and happened to chose a value above 15, the old code inadvertantly truncated it with an "& 0x0f". If the periferal picked something really bad like 0x32, you'd end up with an offset of 2 which would hang the drive since it didn't expect to ever get something so low. We now do a MIN(maxoffset, given_offset). 2) In the case of Wide cards, we were turning on sync transfers after a sucessfull wide negotiation. Now we leave the offset alone in the per target scratch space (which implies asyncronous transfers since we initialize it that way) until a syncronous negotation occurs. 3) We were advertizing a max offset of 15 instead of 8 for wide devices. 4) If the upper level SCSI code sent down a "SCSI_RESET", it would hang the system because we would end up sending a null command to the sequencer. Now we handle SCSI_RESET correctly by having the sequencer interrupt us when it is about to fill the message buffer so that we can fill it in ourselves. The sequencer will also "simulate" a command complete for these "message only" SCBs so that the kernel driver can finish up properly. The cdplay utility will send a "SCSI_REST" to the cdplayer if you use the reset command. 5) The code that handles SCSIINTs was broken in that if more than one type of error was true at once, we'd do outbs without the card being paused. The else clause after the busfree case was also an accident waiting to happen. I've now turned this into an if, else if, else type of thing, since in most cases when we handle one type of error, it should be okay to ignore the rest (ie if we have a SELTO, who cares if there was a parity error on the transaction?), but the section should really be rewritten after 2.0.5. This fix was the least obtrusive way to patch the problem. 6) Only tag either SDTR or WDTR negotiation on an SCB. The real problem is that I don't account for the case when an SCB that is tagged to do a particular type of negotiation completes or SELTOs (selection timeout) without the negotiation taking place, so the accounting of sdtrpending and wdtrpending gets screwed up. In the wide case, if we tag it to do both wdtr and sdtr, it only performs wdtr (since wdtr must occur first and we spread out the negotiation over two commands) so we always have sdtrpending set for that target and we never do a real SDTR. I fill properly fix the accounting after 2.0.5 goes out the door, but this works (as confirmed by Dan) on wide targets. Other stuff that is also included: 1) Don't do a bzero when recycling SCBs. The only thing that must explicitly be set to zero is the scb control byte which is done in ahc_get_scb. We also need to set the SG_list_pointer and SG_list_count to 0 for commands that do not transfer data. 2) Mask the interrupt type printout for the aic7870 case. The bit we were using to determine interrupt type is only valid for the aic7770. Submitted by: Justin Gibbs
1995-05-17 07:06:02 +00:00
mvi INTSTAT,AWAITING_MSG
Fix two race conditions. The first could occur because the original code would continue to reset the SCSIID register while waiting for a selection. This could potentially conflict with a reconnect since a successfull reconnect will also set the SCSIID register. The fix is to use a separate wait loop after starting a selection (as was done a few revisions ago). The second probably never happens, but it was possible for a target to reconnect while there was a pending SCB on the waiting list and not get noticed. The fix was to remove a supurflous check of the scb waiting list.
1995-08-05 06:59:17 +00:00
jmp wait_for_selection
Fixes to the aic7xxx sequencer code and device driver from Justin Gibbs: 1) If a target initiated a sync negotiation with us and happened to chose a value above 15, the old code inadvertantly truncated it with an "& 0x0f". If the periferal picked something really bad like 0x32, you'd end up with an offset of 2 which would hang the drive since it didn't expect to ever get something so low. We now do a MIN(maxoffset, given_offset). 2) In the case of Wide cards, we were turning on sync transfers after a sucessfull wide negotiation. Now we leave the offset alone in the per target scratch space (which implies asyncronous transfers since we initialize it that way) until a syncronous negotation occurs. 3) We were advertizing a max offset of 15 instead of 8 for wide devices. 4) If the upper level SCSI code sent down a "SCSI_RESET", it would hang the system because we would end up sending a null command to the sequencer. Now we handle SCSI_RESET correctly by having the sequencer interrupt us when it is about to fill the message buffer so that we can fill it in ourselves. The sequencer will also "simulate" a command complete for these "message only" SCBs so that the kernel driver can finish up properly. The cdplay utility will send a "SCSI_REST" to the cdplayer if you use the reset command. 5) The code that handles SCSIINTs was broken in that if more than one type of error was true at once, we'd do outbs without the card being paused. The else clause after the busfree case was also an accident waiting to happen. I've now turned this into an if, else if, else type of thing, since in most cases when we handle one type of error, it should be okay to ignore the rest (ie if we have a SELTO, who cares if there was a parity error on the transaction?), but the section should really be rewritten after 2.0.5. This fix was the least obtrusive way to patch the problem. 6) Only tag either SDTR or WDTR negotiation on an SCB. The real problem is that I don't account for the case when an SCB that is tagged to do a particular type of negotiation completes or SELTOs (selection timeout) without the negotiation taking place, so the accounting of sdtrpending and wdtrpending gets screwed up. In the wide case, if we tag it to do both wdtr and sdtr, it only performs wdtr (since wdtr must occur first and we spread out the negotiation over two commands) so we always have sdtrpending set for that target and we never do a real SDTR. I fill properly fix the accounting after 2.0.5 goes out the door, but this works (as confirmed by Dan) on wide targets. Other stuff that is also included: 1) Don't do a bzero when recycling SCBs. The only thing that must explicitly be set to zero is the scb control byte which is done in ahc_get_scb. We also need to set the SG_list_pointer and SG_list_count to 0 for commands that do not transfer data. 2) Mask the interrupt type printout for the aic7870 case. The bit we were using to determine interrupt type is only valid for the aic7770. Submitted by: Justin Gibbs
1995-05-17 07:06:02 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mk_identify:
and A,DISCENB,SCB_CONTROL /* mask off disconnect privledge */
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
and SINDEX,0x7,SCB_TCL /* lun */
or SINDEX,A /* or in disconnect privledge */
or SINDEX,MSG_IDENTIFY call mk_mesg /* IDENTIFY message */
Add tagged queueing support to the aic7xxx sequencer code.
1995-02-22 01:37:52 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test SCB_CONTROL,0xb0 jz !message /* WDTR, SDTR or TAG?? */
/*
* Tag Message if Tag enabled in SCB control block. Use SCBPTR as the tag
* value
*/
Add tagged queueing support to the aic7xxx sequencer code.
1995-02-22 01:37:52 +00:00
mk_tag:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi DINDEX, MSG1
test SCB_CONTROL,TAG_ENB jz mk_tag_done
and A,0x23,SCB_CONTROL
Add tagged queueing support to the aic7xxx sequencer code.
1995-02-22 01:37:52 +00:00
mov DINDIR,A
mov DINDIR,SCBPTR
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
add MSG_LEN,COMP_MSG0,DINDEX /* update message length */
Add tagged queueing support to the aic7xxx sequencer code.
1995-02-22 01:37:52 +00:00
mk_tag_done:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mov DINDEX call mk_dtr /* build DTR message if needed */
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
!message:
Fix two race conditions. The first could occur because the original code would continue to reset the SCSIID register while waiting for a selection. This could potentially conflict with a reconnect since a successfull reconnect will also set the SCSIID register. The fix is to use a separate wait loop after starting a selection (as was done a few revisions ago). The second probably never happens, but it was possible for a target to reconnect while there was a pending SCB on the waiting list and not get noticed. The fix was to remove a supurflous check of the scb waiting list.
1995-08-05 06:59:17 +00:00
wait_for_selection:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test SSTAT0,SELDO jnz select
test SSTAT0,SELDI jz wait_for_selection
/*
* Reselection has been initiated by a target. Make a note that we've been
* reselected, but haven't seen an IDENTIFY message from the target
* yet.
*/
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
reselect:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
clr MSG_LEN /* Don't have anything in the mesg buffer */
Restructure the arbitration loop to allow for reselections that win out over the adapter's selections. Many fast periferals were getting upset when the sequencer decided to rearbitrate after the device had already won arbitration. This also forced the creation of a list threaded through the SCBs (since we don't have enough space anywhere else) of commands that are awaiting reselection. This list is run down before any new transactions from the input queue are allowed. The list is appened to whenever we begin a selection (simple case since the selecting device is always at the head) and by the kernel driver whenever a request sense occurs. In the common case, the list is only one element long, but when a reselection wins out over a selection and that reselection generates a request sense, the outstanding selection required for the retreval of the sense code grows the list. On machines with many targets, this might cause the list to grow large, so this solution, which will allow up to the maximum number of I/O requests capible of the card elements in the list, was chosen. The list manipulation is trivial and adds three sequencer instructions of overhead to the selection phase. This fixes the "target busy" errors from micropolis drives and the bursty I/O problem when performing I/O between a Quantum Grand Prix and any other device. I anticipate that this will correct many of the problems that have been reported with this driver. Reviewed by: Wcarchive and David Greenman
1995-04-27 17:44:27 +00:00
mov SELID call initialize_scsiid
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi SAVED_TCL, 0xff /*
* Fill with an imposible value so we
* don't get false hits for a tag
* without an identify.
*/
and FLAGS,0x03 /* clear target specific flags */
or FLAGS,RESELECTED
jmp select2
/*
* After the selection, remove this SCB from the "waiting for selection"
* list. This is achieved by simply moving our "next" pointer into
* WAITING_SCBH. Our next pointer will be set to null the next time this
* SCB is used, so don't bother with it now.
*/
Restructure the arbitration loop to allow for reselections that win out over the adapter's selections. Many fast periferals were getting upset when the sequencer decided to rearbitrate after the device had already won arbitration. This also forced the creation of a list threaded through the SCBs (since we don't have enough space anywhere else) of commands that are awaiting reselection. This list is run down before any new transactions from the input queue are allowed. The list is appened to whenever we begin a selection (simple case since the selecting device is always at the head) and by the kernel driver whenever a request sense occurs. In the common case, the list is only one element long, but when a reselection wins out over a selection and that reselection generates a request sense, the outstanding selection required for the retreval of the sense code grows the list. On machines with many targets, this might cause the list to grow large, so this solution, which will allow up to the maximum number of I/O requests capible of the card elements in the list, was chosen. The list manipulation is trivial and adds three sequencer instructions of overhead to the selection phase. This fixes the "target busy" errors from micropolis drives and the bursty I/O problem when performing I/O between a Quantum Grand Prix and any other device. I anticipate that this will correct many of the problems that have been reported with this driver. Reviewed by: Wcarchive and David Greenman
1995-04-27 17:44:27 +00:00
select:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
and FLAGS,0x03 /* Clear target flags */
or SCB_CONTROL,NEEDDMA
/*
* Some drives will issue a simple tag message during
* a tagged selection if they are immediately ready
* to handle the command without a disconnect. Ensure
* that SAVED_TCL (used in get_tag) is inialized correctly
* during a selection for this reason.
*/
mov SAVED_TCL, SCB_TCL
mov WAITING_SCBH,SCB_NEXT_WAITING
Restructure the arbitration loop to allow for reselections that win out over the adapter's selections. Many fast periferals were getting upset when the sequencer decided to rearbitrate after the device had already won arbitration. This also forced the creation of a list threaded through the SCBs (since we don't have enough space anywhere else) of commands that are awaiting reselection. This list is run down before any new transactions from the input queue are allowed. The list is appened to whenever we begin a selection (simple case since the selecting device is always at the head) and by the kernel driver whenever a request sense occurs. In the common case, the list is only one element long, but when a reselection wins out over a selection and that reselection generates a request sense, the outstanding selection required for the retreval of the sense code grows the list. On machines with many targets, this might cause the list to grow large, so this solution, which will allow up to the maximum number of I/O requests capible of the card elements in the list, was chosen. The list manipulation is trivial and adds three sequencer instructions of overhead to the selection phase. This fixes the "target busy" errors from micropolis drives and the bursty I/O problem when performing I/O between a Quantum Grand Prix and any other device. I anticipate that this will correct many of the problems that have been reported with this driver. Reviewed by: Wcarchive and David Greenman
1995-04-27 17:44:27 +00:00
select2:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Set CLRCHN here before the target has entered a data transfer mode -
* with synchronous SCSI, if you do it later, you blow away some
* data in the SCSI FIFO that the target has already sent to you.
*/
clr SIGSTATE
or SXFRCTL0,CLRCHN
/*
* Initialize SCSIRATE with the appropriate value for this target.
*/
call ndx_dtr
mov SCSIRATE,SINDIR
mvi SCSISEQ,ENAUTOATNP /*
* ATN on parity errors
* for "in" phases
*/
mvi CLRSINT1,CLRBUSFREE
mvi CLRSINT0,0x60 /* CLRSELDI|CLRSELDO */
/*
* Main loop for information transfer phases. If BSY is false, then
* we have a bus free condition, expected or not. Otherwise, wait
* for the target to assert REQ before checking MSG, C/D and I/O
* for the bus phase.
*
*/
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
ITloop:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test SSTAT1,BUSFREE jnz p_busfree
test SSTAT1,REQINIT jz ITloop
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
and A,PHASE_MASK,SCSISIGI
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
Set SCSIGO generically before we determine the phase instead of doing it in each phase routine. Saves a few instructions. Be more careful in how we deal with SXFRCTL0. Or in the control bits of interest instead of using mvi. The kernel driver will set the ULTRAEN bit of SXFRCTL0 if we are using Ultra (20MHz) mode and we don't want to clobber it. In sdtr_to_rate divide by two if we are in ultra mode to get the correct setting since its a 20MHz instead of 10MHz scale.
1995-10-26 23:54:13 +00:00
mov A call scsisig
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
cmp ALLZEROS,A je p_dataout
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
cmp A,P_DATAIN je p_datain
cmp A,P_COMMAND je p_command
cmp A,P_MESGOUT je p_mesgout
cmp A,P_STATUS je p_status
cmp A,P_MESGIN je p_mesgin
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi INTSTAT,BAD_PHASE /* unknown phase - signal driver */
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
p_dataout:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi DMAPARAMS,0x7d /*
* WIDEODD|SCSIEN|SDMAEN|HDMAEN|
* DIRECTION|FIFORESET
*/
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
jmp data_phase_init
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* If we re-enter the data phase after going through another phase, the
* STCNT may have been cleared, so restore it from the residual field.
*/
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
data_phase_reinit:
mvi DINDEX, STCNT
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi SCB_RESID_DCNT call bcopy_3
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
jmp data_phase_loop
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
p_datain:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi DMAPARAMS,0x79 /*
* WIDEODD|SCSIEN|SDMAEN|HDMAEN|
* !DIRECTION|FIFORESET
*/
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
data_phase_init:
call assert
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
test FLAGS, DPHASE jnz data_phase_reinit
call sg_scb2ram
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
or FLAGS, DPHASE /* We have seen a data phase */
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
data_phase_loop:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/* If we are the last SG block, don't set wideodd. */
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
cmp SG_COUNT,0x01 jne data_phase_wideodd
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
and DMAPARAMS, 0xbf /* Turn off WIDEODD */
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
data_phase_wideodd:
mov DMAPARAMS call dma
Major overhaul of the aic7xxx driver: - Report valid residual byte counts. We actually pause the sequencer when the residual is non-zero. I thought about using DMA to do this, bus sequencer program space is tight. - Fix embarassing off by one error in the computation of a 2's compliment variable. This was most likely the cause of the many problems reported with the tagged queuing code. - Handle "MAX_SYNC" as a special case (ie we are the ones starting the sync negotiation sequence). This was done so that the target scratch area can be initialed to 0 offset (asyncronous transfers) safely. The initialization to 0 (was 15) is necessary since in some cases a Wide negotiation could run into problems if SCSIRATE was set wrong and we went into data(in/out). - Trim the DMA routines a little by using some procedures. Net effect is more functionality with 3 less instructions after this update. - Toggle the WIDEODD bit of the DFCNTRL whenever this is not the last SG block. It has no effect in the 8bit bus configuration, but in the Wide configuration ensures that the overlap byte is held in the SCSI block if the transfer is odd so it will end up in the next SG (the correct behavior).
1995-03-31 14:06:02 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/* Exit if we had an underrun */
test SSTAT0,SDONE jz data_phase_finish /* underrun STCNT != 0 */
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Advance the scatter-gather pointers if needed
*/
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
sg_advance:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
dec SG_COUNT /* one less segment to go */
test SG_COUNT, 0xff jz data_phase_finish /* Are we done? */
clr A /* add sizeof(struct scatter) */
add SG_NEXT0,SG_SIZEOF,SG_NEXT0
adc SG_NEXT1,A,SG_NEXT1
adc SG_NEXT2,A,SG_NEXT2
adc SG_NEXT3,A,SG_NEXT3
/*
* Load a struct scatter and set up the data address and length.
* If the working value of the SG count is nonzero, then
* we need to load a new set of values.
*
* This, like all DMA's, assumes a little-endian host data storage.
*/
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
sg_load:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
clr HCNT2
clr HCNT1
mvi HCNT0,SG_SIZEOF
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
aic7xxx.c: Print out the length of the compiled sequencer program. aic7xxx.seq: More optimizations. Replace generic bcopy routine with bcopy_3 and bcopy_4 (ie unroll the loops) since these are the only two cases used. Initialize SIMODE1 and SXFRCTL1 from the kernel in ahc_init instead of at each selection/reselection since this is expensive and only needs to be done once. Condense function returns into previous instruction if possible. Reorder some sections to kill superflous jumps. These optimizations kill the ~150k/s penalty adding support for Twin/Wide cards was costing since the last place in the commaon path of execution where we had to do ugly, convoluted testing for the type of card in the sequencer has gone away. Next stop tagged queuing and target mode.
1995-01-22 00:46:53 +00:00
mvi DINDEX,HADDR
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
mvi SG_NEXT call bcopy_4
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi DFCNTRL,0xd /* HDMAEN|DIRECTION|FIFORESET */
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Wait for DMA from host memory to data FIFO to complete, then disable
* DMA and wait for it to acknowledge that it's off.
*/
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
call dma_finish
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Copy data from FIFO into SCB data pointer and data count. This assumes
* that the struct scatterlist has this structure (this and sizeof(struct
* scatterlist) == 12 are asserted in aic7xxx.c):
*
* struct scatterlist {
* char *address; four bytes, little-endian order
* ... four bytes, ignored
* unsigned short length; two bytes, little-endian order
* }
*
*
* Not in FreeBSD. the scatter list entry is only 8 bytes.
*
* struct ahc_dma_seg {
* physaddr addr; four bytes, little-endian order
* long len; four bytes, little endian order
* };
*/
/*
* For Linux, we must throw away four bytes since there is a 32bit gap
* in the middle of a struct scatterlist
*/
#ifdef LINUX
call bcopy_4_dfdat
mov NONE,DFDAT
mov NONE,DFDAT
mov NONE,DFDAT
mov NONE,DFDAT
call bcopy_3_dfdat /* Only support 24 bit length. */
#else
/*
* For FreeBSD, just copy it wholesale
*/
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
mvi DINDEX,HADDR
call bcopy_7_dfdat
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
#endif
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/* Load STCNT as well. It is a mirror of HCNT */
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
mvi DINDEX,STCNT
mvi HCNT call bcopy_3
test SSTAT1,PHASEMIS jz data_phase_loop
data_phase_finish:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* After a DMA finishes, save the SG and STCNT residuals back into the SCB
* We use STCNT instead of HCNT, since it's a reflection of how many bytes
* were transferred on the SCSI (as opposed to the host) bus.
*/
mvi DINDEX,SCB_RESID_DCNT
mvi STCNT call bcopy_3
mov SCB_RESID_SGCNT, SG_COUNT
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
jmp ITloop
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Command phase. Set up the DMA registers and let 'er rip - the
* two bytes after the SCB SCSI_cmd_length are zeroed by the driver,
* so we can copy those three bytes directly into HCNT.
*/
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
p_command:
call assert
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Load HADDR and HCNT. We can do this in one bcopy since they are neighbors
*/
aic7xxx.c: Print out the length of the compiled sequencer program. aic7xxx.seq: More optimizations. Replace generic bcopy routine with bcopy_3 and bcopy_4 (ie unroll the loops) since these are the only two cases used. Initialize SIMODE1 and SXFRCTL1 from the kernel in ahc_init instead of at each selection/reselection since this is expensive and only needs to be done once. Condense function returns into previous instruction if possible. Reorder some sections to kill superflous jumps. These optimizations kill the ~150k/s penalty adding support for Twin/Wide cards was costing since the last place in the commaon path of execution where we had to do ugly, convoluted testing for the type of card in the sequencer has gone away. Next stop tagged queuing and target mode.
1995-01-22 00:46:53 +00:00
mvi DINDEX,HADDR
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi SCB_CMDPTR call bcopy_7
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
aic7xxx.c: Print out the length of the compiled sequencer program. aic7xxx.seq: More optimizations. Replace generic bcopy routine with bcopy_3 and bcopy_4 (ie unroll the loops) since these are the only two cases used. Initialize SIMODE1 and SXFRCTL1 from the kernel in ahc_init instead of at each selection/reselection since this is expensive and only needs to be done once. Condense function returns into previous instruction if possible. Reorder some sections to kill superflous jumps. These optimizations kill the ~150k/s penalty adding support for Twin/Wide cards was costing since the last place in the commaon path of execution where we had to do ugly, convoluted testing for the type of card in the sequencer has gone away. Next stop tagged queuing and target mode.
1995-01-22 00:46:53 +00:00
mvi DINDEX,STCNT
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi SCB_CMDLEN call bcopy_3
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
mvi 0x3d call dma # SCSIEN|SDMAEN|HDMAEN|
# DIRECTION|FIFORESET
jmp ITloop
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Status phase. Wait for the data byte to appear, then read it
* and store it into the SCB.
*/
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
p_status:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi SCB_TARGET_STATUS call inb_first
Clean up the mesgin code to make it easier to read with proceedure lables that are based on what mesage is being processed instead of just numbers. Order the tests for incoming message type by level of occurance.
1995-08-06 05:15:45 +00:00
jmp mesgin_done
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Message out phase. If there is no active message, but the target
* took us into this phase anyway, build a no-op message and send it.
*/
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
p_mesgout:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test MSG_LEN, 0xff jnz p_mesgout_start
mvi MSG_NOP call mk_mesg /* build NOP message */
p_mesgout_start:
/*
* Set up automatic PIO transfer from MSG0. Bit 3 in
* SXFRCTL0 (SPIOEN) is already on.
*/
mvi SINDEX,MSG0
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
mov DINDEX,MSG_LEN
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* When target asks for a byte, drop ATN if it's the last one in
* the message. Otherwise, keep going until the message is exhausted.
*
* Keep an eye out for a phase change, in case the target issues
* a MESSAGE REJECT.
*/
p_mesgout_loop:
aic7xxx.seq: Add the same type of safeguards we use in the mesg_in phase to the mesg_out phase. aic7xxx_reg.h: Add definitions for the DSCommand register for PCI adapters.
1996-01-07 19:18:28 +00:00
test SSTAT1,PHASEMIS jnz p_mesgout_phasemis
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test SSTAT0,SPIORDY jz p_mesgout_loop
cmp DINDEX,1 jne p_mesgout_outb /* last byte? */
mvi CLRSINT1,CLRATNO /* drop ATN */
p_mesgout_outb:
aic7xxx.seq: Add the same type of safeguards we use in the mesg_in phase to the mesg_out phase. aic7xxx_reg.h: Add definitions for the DSCommand register for PCI adapters.
1996-01-07 19:18:28 +00:00
or SXFRCTL0, CLRSTCNT
mvi STCNT0, 1
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
dec DINDEX
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
mov SCSIDATL,SINDIR
aic7xxx.seq: Add the same type of safeguards we use in the mesg_in phase to the mesg_out phase. aic7xxx_reg.h: Add definitions for the DSCommand register for PCI adapters.
1996-01-07 19:18:28 +00:00
p_mesgout_outb_wait:
test SSTAT0,SDONE jz p_mesgout_outb_wait
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
p_mesgout4:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test DINDEX,0xff jnz p_mesgout_loop
/*
* If the next bus phase after ATN drops is a message out, it means
* that the target is requesting that the last message(s) be resent.
*/
p_mesgout_snoop:
test SSTAT1,BUSFREE jnz p_mesgout_done
test SSTAT1,REQINIT jz p_mesgout_snoop
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test SSTAT1,PHASEMIS jnz p_mesgout_done
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
or SINDEX,0x10,SIGSTATE /* turn on ATNO */
call scsisig /* ATNO - re-assert ATN */
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
jmp ITloop
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
p_mesgout_phasemis:
mvi CLRSINT1,CLRATNO /* Be sure turn ATNO off */
p_mesgout_done:
clr MSG_LEN /* no active msg */
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
jmp ITloop
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Message in phase. Bytes are read using Automatic PIO mode.
*/
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
p_mesgin:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi A call inb_first /* read the 1st message byte */
mov REJBYTE,A /* save it for the driver */
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test A,MSG_IDENTIFY jnz mesgin_identify
cmp A,MSG_DISCONNECT je mesgin_disconnect
cmp A,MSG_SDPTRS je mesgin_sdptrs
cmp ALLZEROS,A je mesgin_complete
cmp A,MSG_RDPTRS je mesgin_rdptrs
cmp A,MSG_EXTENDED je mesgin_extended
cmp A,MSG_REJECT je mesgin_reject
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
Clean up the mesgin code to make it easier to read with proceedure lables that are based on what mesage is being processed instead of just numbers. Order the tests for incoming message type by level of occurance.
1995-08-06 05:15:45 +00:00
rej_mesgin:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* We have no idea what this message in is, and there's no way
* to pass it up to the kernel, so we issue a message reject and
* hope for the best. Since we're now using manual PIO mode to
* read in the message, there should no longer be a race condition
* present when we assert ATN. In any case, rejection should be a
* rare occurrence - signal the driver when it happens.
*/
or SINDEX,0x10,SIGSTATE /* turn on ATNO */
Clean up the mesgin code to make it easier to read with proceedure lables that are based on what mesage is being processed instead of just numbers. Order the tests for incoming message type by level of occurance.
1995-08-06 05:15:45 +00:00
call scsisig
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi INTSTAT,SEND_REJECT /* let driver know */
Clean up the mesgin code to make it easier to read with proceedure lables that are based on what mesage is being processed instead of just numbers. Order the tests for incoming message type by level of occurance.
1995-08-06 05:15:45 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi MSG_REJECT call mk_mesg
Clean up the mesgin code to make it easier to read with proceedure lables that are based on what mesage is being processed instead of just numbers. Order the tests for incoming message type by level of occurance.
1995-08-06 05:15:45 +00:00
mesgin_done:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
call inb_last /*ack & turn auto PIO back on*/
Clean up the mesgin code to make it easier to read with proceedure lables that are based on what mesage is being processed instead of just numbers. Order the tests for incoming message type by level of occurance.
1995-08-06 05:15:45 +00:00
jmp ITloop
mesgin_complete:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* We got a "command complete" message, so put the SCB pointer
* into the Queue Out, and trigger a completion interrupt.
* Check status for non zero return and interrupt driver if needed
* This allows the driver to interpret errors only when they occur
* instead of always uploading the scb. If the status is SCSI_CHECK,
* the driver will download a new scb requesting sense to replace
* the old one, modify the "waiting for selection" SCB list and set
* RETURN_1 to 0x80. If RETURN_1 is set to 0x80 the sequencer imediately
* jumps to main loop where it will run down the waiting SCB list.
* If the kernel driver does not wish to request sense, it need
* only clear RETURN_1, and the command is allowed to complete. We don't
* bother to post to the QOUTFIFO in the error case since it would require
* extra work in the kernel driver to ensure that the entry was removed
* before the command complete code tried processing it.
*
* First check for residuals
*/
test SCB_RESID_SGCNT,0xff jz check_status
/*
* If we have a residual count, interrupt and tell the host. Other
* alternatives are to pause the sequencer on all command completes (yuck),
* dma the resid directly to the host (slick, we may have space to do it now)
* or have the sequencer pause itself when it encounters a non-zero resid
* (unecessary pause just to flag the command -yuck-, but takes one instruction
* and since it shouldn't happen that often is good enough for our purposes).
*/
resid:
mvi INTSTAT,RESIDUAL
Major overhaul of the aic7xxx driver: - Report valid residual byte counts. We actually pause the sequencer when the residual is non-zero. I thought about using DMA to do this, bus sequencer program space is tight. - Fix embarassing off by one error in the computation of a 2's compliment variable. This was most likely the cause of the many problems reported with the tagged queuing code. - Handle "MAX_SYNC" as a special case (ie we are the ones starting the sync negotiation sequence). This was done so that the target scratch area can be initialed to 0 offset (asyncronous transfers) safely. The initialization to 0 (was 15) is necessary since in some cases a Wide negotiation could run into problems if SCSIRATE was set wrong and we went into data(in/out). - Trim the DMA routines a little by using some procedures. Net effect is more functionality with 3 less instructions after this update. - Toggle the WIDEODD bit of the DFCNTRL whenever this is not the last SG block. It has no effect in the 8bit bus configuration, but in the Wide configuration ensures that the overlap byte is held in the SCSI block if the transfer is odd so it will end up in the next SG (the correct behavior).
1995-03-31 14:06:02 +00:00
check_status:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test SCB_TARGET_STATUS,0xff jz status_ok /* Good Status? */
mvi INTSTAT,BAD_STATUS /* let driver know */
cmp RETURN_1, SEND_SENSE jne status_ok
Clean up the mesgin code to make it easier to read with proceedure lables that are based on what mesage is being processed instead of just numbers. Order the tests for incoming message type by level of occurance.
1995-08-06 05:15:45 +00:00
jmp mesgin_done
Update the sequencer code to handle both channels of Twin channel devices. You can now sling 14 devices off of a 274xT. In the process of adding twin channel support, I removed all evident restrictions on supporting Wide channeled devices, but I do not have a Wide controller to test them on. aic7770_seq.h, the pre-compiled header, is no longer needed since config handles this dependancy.
1994-12-31 19:26:54 +00:00
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
status_ok:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/* First, mark this target as free. */
test SCB_CONTROL,TAG_ENB jnz test_immediate /*
* Tagged commands
* don't busy the
* target.
*/
mov FUNCTION1,SCB_TCL
Update the sequencer code to handle both channels of Twin channel devices. You can now sling 14 devices off of a 274xT. In the process of adding twin channel support, I removed all evident restrictions on supporting Wide channeled devices, but I do not have a Wide controller to test them on. aic7770_seq.h, the pre-compiled header, is no longer needed since config handles this dependancy.
1994-12-31 19:26:54 +00:00
mov A,FUNCTION1
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test SCB_TCL,0x88 jz clear_a
Update the sequencer code to handle both channels of Twin channel devices. You can now sling 14 devices off of a 274xT. In the process of adding twin channel support, I removed all evident restrictions on supporting Wide channeled devices, but I do not have a Wide controller to test them on. aic7770_seq.h, the pre-compiled header, is no longer needed since config handles this dependancy.
1994-12-31 19:26:54 +00:00
xor ACTIVE_B,A
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
jmp test_immediate
Update the sequencer code to handle both channels of Twin channel devices. You can now sling 14 devices off of a 274xT. In the process of adding twin channel support, I removed all evident restrictions on supporting Wide channeled devices, but I do not have a Wide controller to test them on. aic7770_seq.h, the pre-compiled header, is no longer needed since config handles this dependancy.
1994-12-31 19:26:54 +00:00
clear_a:
xor ACTIVE_A,A
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test_immediate:
test SCB_CMDLEN,0xff jnz complete /* Immediate message complete */
/*
* Pause the sequencer until the driver gets around to handling the command
* complete. This is so that any action that might require carefull timing
* with the completion of this command can occur.
*/
Pause the sequencer when message only requests complete. This allows the kernel driver to know the exact state of the sequencer after a BUS DEVICE RESET or ABORT completes so it can properly clean up the request.
1995-07-31 08:21:59 +00:00
mvi INTSTAT,IMMEDDONE
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
jmp start
Update the sequencer code to handle both channels of Twin channel devices. You can now sling 14 devices off of a 274xT. In the process of adding twin channel support, I removed all evident restrictions on supporting Wide channeled devices, but I do not have a Wide controller to test them on. aic7770_seq.h, the pre-compiled header, is no longer needed since config handles this dependancy.
1994-12-31 19:26:54 +00:00
complete:
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
mov QOUTFIFO,SCBPTR
Major overhaul of the aic7xxx driver: - Report valid residual byte counts. We actually pause the sequencer when the residual is non-zero. I thought about using DMA to do this, bus sequencer program space is tight. - Fix embarassing off by one error in the computation of a 2's compliment variable. This was most likely the cause of the many problems reported with the tagged queuing code. - Handle "MAX_SYNC" as a special case (ie we are the ones starting the sync negotiation sequence). This was done so that the target scratch area can be initialed to 0 offset (asyncronous transfers) safely. The initialization to 0 (was 15) is necessary since in some cases a Wide negotiation could run into problems if SCSIRATE was set wrong and we went into data(in/out). - Trim the DMA routines a little by using some procedures. Net effect is more functionality with 3 less instructions after this update. - Toggle the WIDEODD bit of the DFCNTRL whenever this is not the last SG block. It has no effect in the 8bit bus configuration, but in the Wide configuration ensures that the overlap byte is held in the SCSI block if the transfer is odd so it will end up in the next SG (the correct behavior).
1995-03-31 14:06:02 +00:00
mvi INTSTAT,CMDCMPLT
Clean up the mesgin code to make it easier to read with proceedure lables that are based on what mesage is being processed instead of just numbers. Order the tests for incoming message type by level of occurance.
1995-08-06 05:15:45 +00:00
jmp mesgin_done
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
Major overhaul of the aic7xxx driver: - Report valid residual byte counts. We actually pause the sequencer when the residual is non-zero. I thought about using DMA to do this, bus sequencer program space is tight. - Fix embarassing off by one error in the computation of a 2's compliment variable. This was most likely the cause of the many problems reported with the tagged queuing code. - Handle "MAX_SYNC" as a special case (ie we are the ones starting the sync negotiation sequence). This was done so that the target scratch area can be initialed to 0 offset (asyncronous transfers) safely. The initialization to 0 (was 15) is necessary since in some cases a Wide negotiation could run into problems if SCSIRATE was set wrong and we went into data(in/out). - Trim the DMA routines a little by using some procedures. Net effect is more functionality with 3 less instructions after this update. - Toggle the WIDEODD bit of the DFCNTRL whenever this is not the last SG block. It has no effect in the 8bit bus configuration, but in the Wide configuration ensures that the overlap byte is held in the SCSI block if the transfer is odd so it will end up in the next SG (the correct behavior).
1995-03-31 14:06:02 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Is it an extended message? We only support the synchronous and wide data
* transfer request messages, which will probably be in response to
* WDTR or SDTR message outs from us. If it's not SDTR or WDTR, reject it -
* apparently this can be done after any message in byte, according
* to the SCSI-2 spec.
*/
Clean up the mesgin code to make it easier to read with proceedure lables that are based on what mesage is being processed instead of just numbers. Order the tests for incoming message type by level of occurance.
1995-08-06 05:15:45 +00:00
mesgin_extended:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi ARG_1 call inb_next /* extended message length */
mvi A call inb_next /* extended message code */
Full support for 294x and Wide devices. Fixed month old bug in the SCSI sense retrieval code that messed up CDROM devices. This code will also responde correctly to SDTR and WDTR messages from devices that start a negotiation sequence.
1995-01-13 02:22:11 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
cmp A,MSG_SDTR je p_mesginSDTR
cmp A,MSG_WDTR je p_mesginWDTR
Clean up the mesgin code to make it easier to read with proceedure lables that are based on what mesage is being processed instead of just numbers. Order the tests for incoming message type by level of occurance.
1995-08-06 05:15:45 +00:00
jmp rej_mesgin
Full support for 294x and Wide devices. Fixed month old bug in the SCSI sense retrieval code that messed up CDROM devices. This code will also responde correctly to SDTR and WDTR messages from devices that start a negotiation sequence.
1995-01-13 02:22:11 +00:00
p_mesginWDTR:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
cmp ARG_1,2 jne rej_mesgin /* extended mesg length=2 */
mvi ARG_1 call inb_next /* Width of bus */
mvi INTSTAT,WDTR_MSG /* let driver know */
test RETURN_1,0xff jz mesgin_done /* Do we need to send WDTR? */
cmp RETURN_1,SEND_REJ je rej_mesgin /*
* Bus width was too large
* Reject it.
*/
/* We didn't initiate the wide negotiation, so we must respond to the request */
and RETURN_1,0x7f /* Clear the SEND_WDTR Flag */
mvi DINDEX,MSG0
mvi MSG0 call mk_wdtr /* build WDTR message */
or SINDEX,0x10,SIGSTATE /* turn on ATNO */
Full support for 294x and Wide devices. Fixed month old bug in the SCSI sense retrieval code that messed up CDROM devices. This code will also responde correctly to SDTR and WDTR messages from devices that start a negotiation sequence.
1995-01-13 02:22:11 +00:00
call scsisig
Clean up the mesgin code to make it easier to read with proceedure lables that are based on what mesage is being processed instead of just numbers. Order the tests for incoming message type by level of occurance.
1995-08-06 05:15:45 +00:00
jmp mesgin_done
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
Full support for 294x and Wide devices. Fixed month old bug in the SCSI sense retrieval code that messed up CDROM devices. This code will also responde correctly to SDTR and WDTR messages from devices that start a negotiation sequence.
1995-01-13 02:22:11 +00:00
p_mesginSDTR:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
cmp ARG_1,3 jne rej_mesgin /* extended mesg length=3 */
mvi ARG_1 call inb_next /* xfer period */
mvi A call inb_next /* REQ/ACK offset */
mvi INTSTAT,SDTR_MSG /* call driver to convert */
test RETURN_1,0xff jz mesgin_done /* Do we need to mk_sdtr/rej */
cmp RETURN_1,SEND_REJ je rej_mesgin /*
* Requested SDTR too small
* Reject it.
*/
mvi DINDEX, MSG0
mvi MSG0 call mk_sdtr
or SINDEX,0x10,SIGSTATE /* turn on ATNO */
Full support for 294x and Wide devices. Fixed month old bug in the SCSI sense retrieval code that messed up CDROM devices. This code will also responde correctly to SDTR and WDTR messages from devices that start a negotiation sequence.
1995-01-13 02:22:11 +00:00
call scsisig
Clean up the mesgin code to make it easier to read with proceedure lables that are based on what mesage is being processed instead of just numbers. Order the tests for incoming message type by level of occurance.
1995-08-06 05:15:45 +00:00
jmp mesgin_done
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Is it a disconnect message? Set a flag in the SCB to remind us
* and await the bus going free.
*/
Clean up the mesgin code to make it easier to read with proceedure lables that are based on what mesage is being processed instead of just numbers. Order the tests for incoming message type by level of occurance.
1995-08-06 05:15:45 +00:00
mesgin_disconnect:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
or SCB_CONTROL,DISCONNECTED
Clean up the mesgin code to make it easier to read with proceedure lables that are based on what mesage is being processed instead of just numbers. Order the tests for incoming message type by level of occurance.
1995-08-06 05:15:45 +00:00
jmp mesgin_done
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Save data pointers message? Copy working values into the SCB,
* usually in preparation for a disconnect.
*/
Clean up the mesgin code to make it easier to read with proceedure lables that are based on what mesage is being processed instead of just numbers. Order the tests for incoming message type by level of occurance.
1995-08-06 05:15:45 +00:00
mesgin_sdptrs:
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
call sg_ram2scb
Clean up the mesgin code to make it easier to read with proceedure lables that are based on what mesage is being processed instead of just numbers. Order the tests for incoming message type by level of occurance.
1995-08-06 05:15:45 +00:00
jmp mesgin_done
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Restore pointers message? Data pointers are recopied from the
* SCB anytime we enter a data phase for the first time, so all
* we need to do is clear the DPHASE flag and let the data phase
* code do the rest.
*/
Clean up the mesgin code to make it easier to read with proceedure lables that are based on what mesage is being processed instead of just numbers. Order the tests for incoming message type by level of occurance.
1995-08-06 05:15:45 +00:00
mesgin_rdptrs:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
and FLAGS,0xfb /*
* !DPHASE we'll reload them
* the next time through
*/
Clean up the mesgin code to make it easier to read with proceedure lables that are based on what mesage is being processed instead of just numbers. Order the tests for incoming message type by level of occurance.
1995-08-06 05:15:45 +00:00
jmp mesgin_done
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Identify message? For a reconnecting target, this tells us the lun
* that the reconnection is for - find the correct SCB and switch to it,
* clearing the "disconnected" bit so we don't "find" it by accident later.
*/
Clean up the mesgin code to make it easier to read with proceedure lables that are based on what mesage is being processed instead of just numbers. Order the tests for incoming message type by level of occurance.
1995-08-06 05:15:45 +00:00
mesgin_identify:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test A,0x78 jnz rej_mesgin /*!DiscPriv|!LUNTAR|!Reserved*/
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
and A,0x07 /* lun in lower three bits */
Add tagged queueing support to the aic7xxx sequencer code.
1995-02-22 01:37:52 +00:00
or SAVED_TCL,A,SELID
and SAVED_TCL,0xf7
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
and A,SELBUSB,SBLKCTL /* B Channel?? */
Add tagged queueing support to the aic7xxx sequencer code.
1995-02-22 01:37:52 +00:00
or SAVED_TCL,A
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
call inb_last /* ACK */
/*
* Here we "snoop" the bus looking for a SIMPLE QUEUE TAG message.
* If we get one, we use the tag returned to switch to the proper
* SCB. Otherwise, we just use the findSCB method.
*/
snoop_tag_loop:
test SSTAT1,BUSFREE jnz use_findSCB
test SSTAT1,REQINIT jz snoop_tag_loop
test SSTAT1,PHASEMIS jnz use_findSCB
mvi A call inb_first
cmp A,MSG_SIMPLE_TAG je get_tag
use_findSCB:
mov ALLZEROS call findSCB /* Have to search */
Add tagged queueing support to the aic7xxx sequencer code.
1995-02-22 01:37:52 +00:00
setup_SCB:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
and SCB_CONTROL,0xfb /* clear disconnect bit in SCB */
or FLAGS,IDENTIFY_SEEN /* make note of IDENTIFY */
Add tagged queueing support to the aic7xxx sequencer code.
1995-02-22 01:37:52 +00:00
jmp ITloop
get_tag:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi ARG_1 call inb_next /* tag value */
/*
* See if the tag is in range. The tag is < SCBCOUNT if we add
* the complement of SCBCOUNT to the incomming tag and there is
* no carry.
*/
mov A,COMP_SCBCOUNT
add SINDEX,A,ARG_1
jc abort_tag
/*
* Ensure that the SCB the tag points to is for an SCB transaction
* to the reconnecting target.
*/
mov SCBPTR,ARG_1
Add tagged queueing support to the aic7xxx sequencer code.
1995-02-22 01:37:52 +00:00
mov A,SAVED_TCL
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
cmp SCB_TCL,A jne abort_tag
test SCB_CONTROL,TAG_ENB jz abort_tag
call inb_last /* Ack Successful tag */
jmp setup_SCB
More code optimizations. Use a slightly different approach to decide whether a reconnecting target is a tagged device or not.
1995-04-09 06:40:16 +00:00
abort_tag:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
or SINDEX,0x10,SIGSTATE /* turn on ATNO */
More code optimizations. Use a slightly different approach to decide whether a reconnecting target is a tagged device or not.
1995-04-09 06:40:16 +00:00
call scsisig
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi INTSTAT,ABORT_TAG /* let driver know */
mvi 0xd call mk_mesg /* ABORT TAG message */
jmp mesgin_done
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Message reject? Let the kernel driver handle this. If we have an
* outstanding WDTR or SDTR negotiation, assume that it's a response from
* the target selecting 8bit or asynchronous transfer, otherwise just ignore
* it since we have no clue what it pertains to.
*/
Clean up the mesgin code to make it easier to read with proceedure lables that are based on what mesage is being processed instead of just numbers. Order the tests for incoming message type by level of occurance.
1995-08-06 05:15:45 +00:00
mesgin_reject:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi INTSTAT, REJECT_MSG
Clean up the mesgin code to make it easier to read with proceedure lables that are based on what mesage is being processed instead of just numbers. Order the tests for incoming message type by level of occurance.
1995-08-06 05:15:45 +00:00
jmp mesgin_done
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* [ ADD MORE MESSAGE HANDLING HERE ]
*/
Add tagged queueing support to the aic7xxx sequencer code.
1995-02-22 01:37:52 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Bus free phase. It might be useful to interrupt the device
* driver if we aren't expecting this. For now, make sure that
* ATN isn't being asserted and look for a new command.
*/
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
p_busfree:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi CLRSINT1,CLRATNO
/*
* if this is an immediate command, perform a psuedo command complete to
* notify the driver.
*/
test SCB_CMDLEN,0xff jz status_ok
jmp start
/*
* Instead of a generic bcopy routine that requires an argument, we unroll
* the cases that are actually used, and call them explicitly. This
* not only reduces the overhead of doing a bcopy, but ends up saving space
* in the program since you don't have to put the argument into the accumulator
* before the call. Both functions expect DINDEX to contain the destination
* address and SINDEX to contain the source address.
*/
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
bcopy_7:
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
mov DINDIR,SINDIR
aic7xxx.c: Print out the length of the compiled sequencer program. aic7xxx.seq: More optimizations. Replace generic bcopy routine with bcopy_3 and bcopy_4 (ie unroll the loops) since these are the only two cases used. Initialize SIMODE1 and SXFRCTL1 from the kernel in ahc_init instead of at each selection/reselection since this is expensive and only needs to be done once. Condense function returns into previous instruction if possible. Reorder some sections to kill superflous jumps. These optimizations kill the ~150k/s penalty adding support for Twin/Wide cards was costing since the last place in the commaon path of execution where we had to do ugly, convoluted testing for the type of card in the sequencer has gone away. Next stop tagged queuing and target mode.
1995-01-22 00:46:53 +00:00
mov DINDIR,SINDIR
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
bcopy_5:
mov DINDIR,SINDIR
aic7xxx.c: Print out the length of the compiled sequencer program. aic7xxx.seq: More optimizations. Replace generic bcopy routine with bcopy_3 and bcopy_4 (ie unroll the loops) since these are the only two cases used. Initialize SIMODE1 and SXFRCTL1 from the kernel in ahc_init instead of at each selection/reselection since this is expensive and only needs to be done once. Condense function returns into previous instruction if possible. Reorder some sections to kill superflous jumps. These optimizations kill the ~150k/s penalty adding support for Twin/Wide cards was costing since the last place in the commaon path of execution where we had to do ugly, convoluted testing for the type of card in the sequencer has gone away. Next stop tagged queuing and target mode.
1995-01-22 00:46:53 +00:00
bcopy_4:
mov DINDIR,SINDIR
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
bcopy_3:
aic7xxx.c: Print out the length of the compiled sequencer program. aic7xxx.seq: More optimizations. Replace generic bcopy routine with bcopy_3 and bcopy_4 (ie unroll the loops) since these are the only two cases used. Initialize SIMODE1 and SXFRCTL1 from the kernel in ahc_init instead of at each selection/reselection since this is expensive and only needs to be done once. Condense function returns into previous instruction if possible. Reorder some sections to kill superflous jumps. These optimizations kill the ~150k/s penalty adding support for Twin/Wide cards was costing since the last place in the commaon path of execution where we had to do ugly, convoluted testing for the type of card in the sequencer has gone away. Next stop tagged queuing and target mode.
1995-01-22 00:46:53 +00:00
mov DINDIR,SINDIR
mov DINDIR,SINDIR
mov DINDIR,SINDIR ret
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
bcopy_7_dfdat:
Major overhaul of the aic7xxx driver: - Report valid residual byte counts. We actually pause the sequencer when the residual is non-zero. I thought about using DMA to do this, bus sequencer program space is tight. - Fix embarassing off by one error in the computation of a 2's compliment variable. This was most likely the cause of the many problems reported with the tagged queuing code. - Handle "MAX_SYNC" as a special case (ie we are the ones starting the sync negotiation sequence). This was done so that the target scratch area can be initialed to 0 offset (asyncronous transfers) safely. The initialization to 0 (was 15) is necessary since in some cases a Wide negotiation could run into problems if SCSIRATE was set wrong and we went into data(in/out). - Trim the DMA routines a little by using some procedures. Net effect is more functionality with 3 less instructions after this update. - Toggle the WIDEODD bit of the DFCNTRL whenever this is not the last SG block. It has no effect in the 8bit bus configuration, but in the Wide configuration ensures that the overlap byte is held in the SCSI block if the transfer is odd so it will end up in the next SG (the correct behavior).
1995-03-31 14:06:02 +00:00
mov DINDIR,DFDAT
mov DINDIR,DFDAT
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
bcopy_5_dfdat:
mov DINDIR,DFDAT
Major overhaul of the aic7xxx driver: - Report valid residual byte counts. We actually pause the sequencer when the residual is non-zero. I thought about using DMA to do this, bus sequencer program space is tight. - Fix embarassing off by one error in the computation of a 2's compliment variable. This was most likely the cause of the many problems reported with the tagged queuing code. - Handle "MAX_SYNC" as a special case (ie we are the ones starting the sync negotiation sequence). This was done so that the target scratch area can be initialed to 0 offset (asyncronous transfers) safely. The initialization to 0 (was 15) is necessary since in some cases a Wide negotiation could run into problems if SCSIRATE was set wrong and we went into data(in/out). - Trim the DMA routines a little by using some procedures. Net effect is more functionality with 3 less instructions after this update. - Toggle the WIDEODD bit of the DFCNTRL whenever this is not the last SG block. It has no effect in the 8bit bus configuration, but in the Wide configuration ensures that the overlap byte is held in the SCSI block if the transfer is odd so it will end up in the next SG (the correct behavior).
1995-03-31 14:06:02 +00:00
bcopy_4_dfdat:
mov DINDIR,DFDAT
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
bcopy_3_dfdat:
Major overhaul of the aic7xxx driver: - Report valid residual byte counts. We actually pause the sequencer when the residual is non-zero. I thought about using DMA to do this, bus sequencer program space is tight. - Fix embarassing off by one error in the computation of a 2's compliment variable. This was most likely the cause of the many problems reported with the tagged queuing code. - Handle "MAX_SYNC" as a special case (ie we are the ones starting the sync negotiation sequence). This was done so that the target scratch area can be initialed to 0 offset (asyncronous transfers) safely. The initialization to 0 (was 15) is necessary since in some cases a Wide negotiation could run into problems if SCSIRATE was set wrong and we went into data(in/out). - Trim the DMA routines a little by using some procedures. Net effect is more functionality with 3 less instructions after this update. - Toggle the WIDEODD bit of the DFCNTRL whenever this is not the last SG block. It has no effect in the 8bit bus configuration, but in the Wide configuration ensures that the overlap byte is held in the SCSI block if the transfer is odd so it will end up in the next SG (the correct behavior).
1995-03-31 14:06:02 +00:00
mov DINDIR,DFDAT
mov DINDIR,DFDAT
mov DINDIR,DFDAT ret
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Locking the driver out, build a one-byte message passed in SINDEX
* if there is no active message already. SINDEX is returned intact.
*/
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
mk_mesg:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi SEQCTL,0x50 /* PAUSEDIS|FASTMODE */
test MSG_LEN,0xff jz mk_mesg1 /* Should always succeed */
/*
* Hmmm. For some reason the mesg buffer is in use.
* Tell the driver. It should look at SINDEX to find
* out what we wanted to use the buffer for and resolve
* the conflict.
*/
mvi SEQCTL,0x10 /* !PAUSEDIS|FASTMODE */
mvi INTSTAT,MSG_BUFFER_BUSY ret
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
mk_mesg1:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi MSG_LEN,1 /* length = 1 */
mov MSG0,SINDEX /* 1-byte message */
mvi SEQCTL,0x10 ret /* !PAUSEDIS|FASTMODE */
/*
* Functions to read data in Automatic PIO mode.
*
* According to Adaptec's documentation, an ACK is not sent on input from
* the target until SCSIDATL is read from. So we wait until SCSIDATL is
* latched (the usual way), then read the data byte directly off the bus
* using SCSIBUSL. When we have pulled the ATN line, or we just want to
* acknowledge the byte, then we do a dummy read from SCISDATL. The SCSI
* spec guarantees that the target will hold the data byte on the bus until
* we send our ACK.
*
* The assumption here is that these are called in a particular sequence,
* and that REQ is already set when inb_first is called. inb_{first,next}
* use the same calling convention as inb.
*/
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
inb_next:
Bring back the more heavy-weight version of the mesgin inb routines. Davidg's testing made me think that some of the checks were superfluous, but wcarchive (and Amancio) know better.
1996-01-05 16:11:49 +00:00
call inb_last
inb_first:
aic7xxx.seq: Add the same type of safeguards we use in the mesg_in phase to the mesg_out phase. aic7xxx_reg.h: Add definitions for the DSCommand register for PCI adapters.
1996-01-07 19:18:28 +00:00
test SSTAT1,PHASEMIS jnz mesgin_phasemis
test SSTAT0,SPIORDY jz inb_first /* wait for next byte */
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mov DINDEX,SINDEX
mov DINDIR,SCSIBUSL ret /*read byte directly from bus*/
inb_last:
aic7xxx.seq: Add the same type of safeguards we use in the mesg_in phase to the mesg_out phase. aic7xxx_reg.h: Add definitions for the DSCommand register for PCI adapters.
1996-01-07 19:18:28 +00:00
or SXFRCTL0,CLRSTCNT
Bring back the more heavy-weight version of the mesgin inb routines. Davidg's testing made me think that some of the checks were superfluous, but wcarchive (and Amancio) know better.
1996-01-05 16:11:49 +00:00
mvi STCNT0,0x01
mov NONE,SCSIDATL /*dummy read from latch to ACK*/
inb_last_wait:
test SSTAT0,SDONE jz inb_last_wait /* Wait for completion */
ret
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mesgin_phasemis:
/*
* We expected to receive another byte, but the target changed phase
*/
mvi INTSTAT, MSGIN_PHASEMIS
jmp ITloop
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* DMA data transfer. HADDR and HCNT must be loaded first, and
* SINDEX should contain the value to load DFCNTRL with - 0x3d for
* host->scsi, or 0x39 for scsi->host. The SCSI channel is cleared
* during initialization.
*/
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
dma:
mov DFCNTRL,SINDEX
dma1:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test SSTAT0,DMADONE jnz dma3
test SSTAT1,PHASEMIS jz dma1 /* ie. underrun */
/*
* We will be "done" DMAing when the transfer count goes to zero, or
* the target changes the phase (in light of this, it makes sense that
* the DMA circuitry doesn't ACK when PHASEMIS is active). If we are
* doing a SCSI->Host transfer, the data FIFO should be flushed auto-
* magically on STCNT=0 or a phase change, so just wait for FIFO empty
* status.
*/
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
dma3:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test SINDEX,DIRECTION jnz dma5
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
dma4:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test DFSTATUS,FIFOEMP jz dma4
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Now shut the DMA enables off and make sure that the DMA enables are
* actually off first lest we get an ILLSADDR.
*/
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
dma5:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/* disable DMA, but maintain WIDEODD */
and A, WIDEODD, SINDEX
mov DFCNTRL, A
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
dma6:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test DFCNTRL,0x38 jnz dma6 /* SCSIENACK|SDMAENACK|HDMAENACK */
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
ret
Major overhaul of the aic7xxx driver: - Report valid residual byte counts. We actually pause the sequencer when the residual is non-zero. I thought about using DMA to do this, bus sequencer program space is tight. - Fix embarassing off by one error in the computation of a 2's compliment variable. This was most likely the cause of the many problems reported with the tagged queuing code. - Handle "MAX_SYNC" as a special case (ie we are the ones starting the sync negotiation sequence). This was done so that the target scratch area can be initialed to 0 offset (asyncronous transfers) safely. The initialization to 0 (was 15) is necessary since in some cases a Wide negotiation could run into problems if SCSIRATE was set wrong and we went into data(in/out). - Trim the DMA routines a little by using some procedures. Net effect is more functionality with 3 less instructions after this update. - Toggle the WIDEODD bit of the DFCNTRL whenever this is not the last SG block. It has no effect in the 8bit bus configuration, but in the Wide configuration ensures that the overlap byte is held in the SCSI block if the transfer is odd so it will end up in the next SG (the correct behavior).
1995-03-31 14:06:02 +00:00
dma_finish:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test DFSTATUS,HDONE jz dma_finish
Major overhaul of the aic7xxx driver: - Report valid residual byte counts. We actually pause the sequencer when the residual is non-zero. I thought about using DMA to do this, bus sequencer program space is tight. - Fix embarassing off by one error in the computation of a 2's compliment variable. This was most likely the cause of the many problems reported with the tagged queuing code. - Handle "MAX_SYNC" as a special case (ie we are the ones starting the sync negotiation sequence). This was done so that the target scratch area can be initialed to 0 offset (asyncronous transfers) safely. The initialization to 0 (was 15) is necessary since in some cases a Wide negotiation could run into problems if SCSIRATE was set wrong and we went into data(in/out). - Trim the DMA routines a little by using some procedures. Net effect is more functionality with 3 less instructions after this update. - Toggle the WIDEODD bit of the DFCNTRL whenever this is not the last SG block. It has no effect in the 8bit bus configuration, but in the Wide configuration ensures that the overlap byte is held in the SCSI block if the transfer is odd so it will end up in the next SG (the correct behavior).
1995-03-31 14:06:02 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
clr DFCNTRL /* disable DMA */
Major overhaul of the aic7xxx driver: - Report valid residual byte counts. We actually pause the sequencer when the residual is non-zero. I thought about using DMA to do this, bus sequencer program space is tight. - Fix embarassing off by one error in the computation of a 2's compliment variable. This was most likely the cause of the many problems reported with the tagged queuing code. - Handle "MAX_SYNC" as a special case (ie we are the ones starting the sync negotiation sequence). This was done so that the target scratch area can be initialed to 0 offset (asyncronous transfers) safely. The initialization to 0 (was 15) is necessary since in some cases a Wide negotiation could run into problems if SCSIRATE was set wrong and we went into data(in/out). - Trim the DMA routines a little by using some procedures. Net effect is more functionality with 3 less instructions after this update. - Toggle the WIDEODD bit of the DFCNTRL whenever this is not the last SG block. It has no effect in the 8bit bus configuration, but in the Wide configuration ensures that the overlap byte is held in the SCSI block if the transfer is odd so it will end up in the next SG (the correct behavior).
1995-03-31 14:06:02 +00:00
dma_finish2:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test DFCNTRL,HDMAENACK jnz dma_finish2
Major overhaul of the aic7xxx driver: - Report valid residual byte counts. We actually pause the sequencer when the residual is non-zero. I thought about using DMA to do this, bus sequencer program space is tight. - Fix embarassing off by one error in the computation of a 2's compliment variable. This was most likely the cause of the many problems reported with the tagged queuing code. - Handle "MAX_SYNC" as a special case (ie we are the ones starting the sync negotiation sequence). This was done so that the target scratch area can be initialed to 0 offset (asyncronous transfers) safely. The initialization to 0 (was 15) is necessary since in some cases a Wide negotiation could run into problems if SCSIRATE was set wrong and we went into data(in/out). - Trim the DMA routines a little by using some procedures. Net effect is more functionality with 3 less instructions after this update. - Toggle the WIDEODD bit of the DFCNTRL whenever this is not the last SG block. It has no effect in the 8bit bus configuration, but in the Wide configuration ensures that the overlap byte is held in the SCSI block if the transfer is odd so it will end up in the next SG (the correct behavior).
1995-03-31 14:06:02 +00:00
ret
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Common SCSI initialization for selection and reselection. Expects
* the target SCSI ID to be in the upper four bits of SINDEX, and A's
* contents are stomped on return.
*/
Restructure the arbitration loop to allow for reselections that win out over the adapter's selections. Many fast periferals were getting upset when the sequencer decided to rearbitrate after the device had already won arbitration. This also forced the creation of a list threaded through the SCBs (since we don't have enough space anywhere else) of commands that are awaiting reselection. This list is run down before any new transactions from the input queue are allowed. The list is appened to whenever we begin a selection (simple case since the selecting device is always at the head) and by the kernel driver whenever a request sense occurs. In the common case, the list is only one element long, but when a reselection wins out over a selection and that reselection generates a request sense, the outstanding selection required for the retreval of the sense code grows the list. On machines with many targets, this might cause the list to grow large, so this solution, which will allow up to the maximum number of I/O requests capible of the card elements in the list, was chosen. The list manipulation is trivial and adds three sequencer instructions of overhead to the selection phase. This fixes the "target busy" errors from micropolis drives and the bursty I/O problem when performing I/O between a Quantum Grand Prix and any other device. I anticipate that this will correct many of the problems that have been reported with this driver. Reviewed by: Wcarchive and David Greenman
1995-04-27 17:44:27 +00:00
initialize_scsiid:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
and SINDEX,0xf0 /* Get target ID */
aic7xxx.c: Print out the length of the compiled sequencer program. aic7xxx.seq: More optimizations. Replace generic bcopy routine with bcopy_3 and bcopy_4 (ie unroll the loops) since these are the only two cases used. Initialize SIMODE1 and SXFRCTL1 from the kernel in ahc_init instead of at each selection/reselection since this is expensive and only needs to be done once. Condense function returns into previous instruction if possible. Reorder some sections to kill superflous jumps. These optimizations kill the ~150k/s penalty adding support for Twin/Wide cards was costing since the last place in the commaon path of execution where we had to do ugly, convoluted testing for the type of card in the sequencer has gone away. Next stop tagged queuing and target mode.
1995-01-22 00:46:53 +00:00
and A,0x0f,SCSIID
or SINDEX,A
Restructure the arbitration loop to allow for reselections that win out over the adapter's selections. Many fast periferals were getting upset when the sequencer decided to rearbitrate after the device had already won arbitration. This also forced the creation of a list threaded through the SCBs (since we don't have enough space anywhere else) of commands that are awaiting reselection. This list is run down before any new transactions from the input queue are allowed. The list is appened to whenever we begin a selection (simple case since the selecting device is always at the head) and by the kernel driver whenever a request sense occurs. In the common case, the list is only one element long, but when a reselection wins out over a selection and that reselection generates a request sense, the outstanding selection required for the retreval of the sense code grows the list. On machines with many targets, this might cause the list to grow large, so this solution, which will allow up to the maximum number of I/O requests capible of the card elements in the list, was chosen. The list manipulation is trivial and adds three sequencer instructions of overhead to the selection phase. This fixes the "target busy" errors from micropolis drives and the bursty I/O problem when performing I/O between a Quantum Grand Prix and any other device. I anticipate that this will correct many of the problems that have been reported with this driver. Reviewed by: Wcarchive and David Greenman
1995-04-27 17:44:27 +00:00
mov SCSIID,SINDEX ret
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Assert that if we've been reselected, then we've seen an IDENTIFY
* message.
*/
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
assert:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test FLAGS,RESELECTED jz return /* reselected? */
test FLAGS,IDENTIFY_SEEN jnz return /* seen IDENTIFY? */
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi INTSTAT,NO_IDENT ret /* no - cause a kernel panic */
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Locate the SCB matching the target ID/channel/lun in SAVED_TCL and switch
* the SCB to it. Have the kernel print a warning message if it can't be
* found, and generate an ABORT message to the target. SINDEX should be
* cleared on call.
*/
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
findSCB:
Add tagged queueing support to the aic7xxx sequencer code.
1995-02-22 01:37:52 +00:00
mov A,SAVED_TCL
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mov SCBPTR,SINDEX /* switch to new SCB */
cmp SCB_TCL,A jne findSCB1 /* target ID/channel/lun match? */
test SCB_CONTROL,DISCONNECTED jz findSCB1 /*should be disconnected*/
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
ret
Add tagged queueing support to the aic7xxx sequencer code.
1995-02-22 01:37:52 +00:00
findSCB1:
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
inc SINDEX
mov A,SCBCOUNT
Add tagged queueing support to the aic7xxx sequencer code.
1995-02-22 01:37:52 +00:00
cmp SINDEX,A jne findSCB
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi INTSTAT,NO_MATCH /* not found - signal kernel */
mvi MSG_ABORT call mk_mesg /* ABORT message */
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
or SINDEX,0x10,SIGSTATE /* assert ATNO */
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
call scsisig
ret
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Make a working copy of the scatter-gather parameters from the SCB.
*/
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
sg_scb2ram:
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
mvi DINDEX,HADDR
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi SCB_DATAPTR call bcopy_7
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
mvi DINDEX,STCNT
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi SCB_DATACNT call bcopy_3
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mov SG_COUNT,SCB_SGCOUNT
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
mvi DINDEX,SG_NEXT
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi SCB_SGPTR call bcopy_4
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
ret
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Copying RAM values back to SCB, for Save Data Pointers message, but
* only if we've actually been into a data phase to change them. This
* protects against bogus data in scratch ram and the residual counts
* since they are only initialized when we go into data_in or data_out.
*/
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
sg_ram2scb:
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
test FLAGS, DPHASE jz return
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mov SCB_SGCOUNT,SG_COUNT
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi DINDEX,SCB_SGPTR
aic7xxx.c: Print out the length of the compiled sequencer program. aic7xxx.seq: More optimizations. Replace generic bcopy routine with bcopy_3 and bcopy_4 (ie unroll the loops) since these are the only two cases used. Initialize SIMODE1 and SXFRCTL1 from the kernel in ahc_init instead of at each selection/reselection since this is expensive and only needs to be done once. Condense function returns into previous instruction if possible. Reorder some sections to kill superflous jumps. These optimizations kill the ~150k/s penalty adding support for Twin/Wide cards was costing since the last place in the commaon path of execution where we had to do ugly, convoluted testing for the type of card in the sequencer has gone away. Next stop tagged queuing and target mode.
1995-01-22 00:46:53 +00:00
mvi SG_NEXT call bcopy_4
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi DINDEX,SCB_DATAPTR
Total rewrite of the dataphase sections of the sequencer. This was done to replace the very poor, original implementation of Scatter/Gather operations. Use a bit (that was freed up with the rewrite above) in the SCB control byte to designate commands that should allow disconnection. The kernel driver makes this decision now instead of the sequencer since the sequencer can't do the indexing very efficiently. This commit drops the sequencer from 426 instructions to 390 most likely freeing enough space to do a target mode implementation.
1995-08-05 17:31:39 +00:00
mvi SHADDR call bcopy_4
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Use the residual number since STCNT is corrupted by any message transfer
*/
mvi SCB_RESID_DCNT call bcopy_3
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
ret
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Add the array base TARG_SCRATCH to the target offset (the target address
* is in SCSIID), and return the result in SINDEX. The accumulator
* contains the 3->8 decoding of the target ID on return.
*/
Full support for 294x and Wide devices. Fixed month old bug in the SCSI sense retrieval code that messed up CDROM devices. This code will also responde correctly to SDTR and WDTR messages from devices that start a negotiation sequence.
1995-01-13 02:22:11 +00:00
ndx_dtr:
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
shr A,SCSIID,4
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test SBLKCTL,SELBUSB jz ndx_dtr_2
or A,0x08 /* Channel B entries add 8 */
Full support for 294x and Wide devices. Fixed month old bug in the SCSI sense retrieval code that messed up CDROM devices. This code will also responde correctly to SDTR and WDTR messages from devices that start a negotiation sequence.
1995-01-13 02:22:11 +00:00
ndx_dtr_2:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
add SINDEX,TARG_SCRATCH,A
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mov FUNCTION1,SCSIID /* 3-bit target address decode */
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
mov A,FUNCTION1 ret
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* If we need to negotiate transfer parameters, build the WDTR or SDTR message
* starting at the address passed in SINDEX. DINDEX is modified on return.
* The SCSI-II spec requires that Wide negotiation occur first and you can
* only negotiat one or the other at a time otherwise in the event of a message
* reject, you wouldn't be able to tell which message was the culpret.
*/
Full support for 294x and Wide devices. Fixed month old bug in the SCSI sense retrieval code that messed up CDROM devices. This code will also responde correctly to SDTR and WDTR messages from devices that start a negotiation sequence.
1995-01-13 02:22:11 +00:00
mk_dtr:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
test SCB_CONTROL,0x90 jz return /* NEEDWDTR|NEEDSDTR */
test SCB_CONTROL,NEEDWDTR jnz mk_wdtr_16bit
or FLAGS, MAXOFFSET /* Force an offset of 15 or 8 if WIDE */
Full support for 294x and Wide devices. Fixed month old bug in the SCSI sense retrieval code that messed up CDROM devices. This code will also responde correctly to SDTR and WDTR messages from devices that start a negotiation sequence.
1995-01-13 02:22:11 +00:00
mk_sdtr:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi DINDIR,1 /* extended message */
mvi DINDIR,3 /* extended message length = 3 */
mvi DINDIR,1 /* SDTR code */
Full support for 294x and Wide devices. Fixed month old bug in the SCSI sense retrieval code that messed up CDROM devices. This code will also responde correctly to SDTR and WDTR messages from devices that start a negotiation sequence.
1995-01-13 02:22:11 +00:00
call sdtr_to_rate
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mov DINDIR,RETURN_1 /* REQ/ACK transfer period */
test FLAGS, MAXOFFSET jnz mk_sdtr_max_offset
and DINDIR,0x0f,SINDIR /* Sync Offset */
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
Major overhaul of the aic7xxx driver: - Report valid residual byte counts. We actually pause the sequencer when the residual is non-zero. I thought about using DMA to do this, bus sequencer program space is tight. - Fix embarassing off by one error in the computation of a 2's compliment variable. This was most likely the cause of the many problems reported with the tagged queuing code. - Handle "MAX_SYNC" as a special case (ie we are the ones starting the sync negotiation sequence). This was done so that the target scratch area can be initialed to 0 offset (asyncronous transfers) safely. The initialization to 0 (was 15) is necessary since in some cases a Wide negotiation could run into problems if SCSIRATE was set wrong and we went into data(in/out). - Trim the DMA routines a little by using some procedures. Net effect is more functionality with 3 less instructions after this update. - Toggle the WIDEODD bit of the DFCNTRL whenever this is not the last SG block. It has no effect in the 8bit bus configuration, but in the Wide configuration ensures that the overlap byte is held in the SCSI block if the transfer is odd so it will end up in the next SG (the correct behavior).
1995-03-31 14:06:02 +00:00
mk_sdtr_done:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
add MSG_LEN,COMP_MSG0,DINDEX ret /* update message length */
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
Fixes to the aic7xxx sequencer code and device driver from Justin Gibbs: 1) If a target initiated a sync negotiation with us and happened to chose a value above 15, the old code inadvertantly truncated it with an "& 0x0f". If the periferal picked something really bad like 0x32, you'd end up with an offset of 2 which would hang the drive since it didn't expect to ever get something so low. We now do a MIN(maxoffset, given_offset). 2) In the case of Wide cards, we were turning on sync transfers after a sucessfull wide negotiation. Now we leave the offset alone in the per target scratch space (which implies asyncronous transfers since we initialize it that way) until a syncronous negotation occurs. 3) We were advertizing a max offset of 15 instead of 8 for wide devices. 4) If the upper level SCSI code sent down a "SCSI_RESET", it would hang the system because we would end up sending a null command to the sequencer. Now we handle SCSI_RESET correctly by having the sequencer interrupt us when it is about to fill the message buffer so that we can fill it in ourselves. The sequencer will also "simulate" a command complete for these "message only" SCBs so that the kernel driver can finish up properly. The cdplay utility will send a "SCSI_REST" to the cdplayer if you use the reset command. 5) The code that handles SCSIINTs was broken in that if more than one type of error was true at once, we'd do outbs without the card being paused. The else clause after the busfree case was also an accident waiting to happen. I've now turned this into an if, else if, else type of thing, since in most cases when we handle one type of error, it should be okay to ignore the rest (ie if we have a SELTO, who cares if there was a parity error on the transaction?), but the section should really be rewritten after 2.0.5. This fix was the least obtrusive way to patch the problem. 6) Only tag either SDTR or WDTR negotiation on an SCB. The real problem is that I don't account for the case when an SCB that is tagged to do a particular type of negotiation completes or SELTOs (selection timeout) without the negotiation taking place, so the accounting of sdtrpending and wdtrpending gets screwed up. In the wide case, if we tag it to do both wdtr and sdtr, it only performs wdtr (since wdtr must occur first and we spread out the negotiation over two commands) so we always have sdtrpending set for that target and we never do a real SDTR. I fill properly fix the accounting after 2.0.5 goes out the door, but this works (as confirmed by Dan) on wide targets. Other stuff that is also included: 1) Don't do a bzero when recycling SCBs. The only thing that must explicitly be set to zero is the scb control byte which is done in ahc_get_scb. We also need to set the SG_list_pointer and SG_list_count to 0 for commands that do not transfer data. 2) Mask the interrupt type printout for the aic7870 case. The bit we were using to determine interrupt type is only valid for the aic7770. Submitted by: Justin Gibbs
1995-05-17 07:06:02 +00:00
mk_sdtr_max_offset:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* We're initiating sync negotiation, so request the max offset we can (15 or 8)
*/
xor FLAGS, MAXOFFSET
/* Talking to a WIDE device? */
test SCSIRATE, WIDEXFER jnz wmax_offset
Fixes to the aic7xxx sequencer code and device driver from Justin Gibbs: 1) If a target initiated a sync negotiation with us and happened to chose a value above 15, the old code inadvertantly truncated it with an "& 0x0f". If the periferal picked something really bad like 0x32, you'd end up with an offset of 2 which would hang the drive since it didn't expect to ever get something so low. We now do a MIN(maxoffset, given_offset). 2) In the case of Wide cards, we were turning on sync transfers after a sucessfull wide negotiation. Now we leave the offset alone in the per target scratch space (which implies asyncronous transfers since we initialize it that way) until a syncronous negotation occurs. 3) We were advertizing a max offset of 15 instead of 8 for wide devices. 4) If the upper level SCSI code sent down a "SCSI_RESET", it would hang the system because we would end up sending a null command to the sequencer. Now we handle SCSI_RESET correctly by having the sequencer interrupt us when it is about to fill the message buffer so that we can fill it in ourselves. The sequencer will also "simulate" a command complete for these "message only" SCBs so that the kernel driver can finish up properly. The cdplay utility will send a "SCSI_REST" to the cdplayer if you use the reset command. 5) The code that handles SCSIINTs was broken in that if more than one type of error was true at once, we'd do outbs without the card being paused. The else clause after the busfree case was also an accident waiting to happen. I've now turned this into an if, else if, else type of thing, since in most cases when we handle one type of error, it should be okay to ignore the rest (ie if we have a SELTO, who cares if there was a parity error on the transaction?), but the section should really be rewritten after 2.0.5. This fix was the least obtrusive way to patch the problem. 6) Only tag either SDTR or WDTR negotiation on an SCB. The real problem is that I don't account for the case when an SCB that is tagged to do a particular type of negotiation completes or SELTOs (selection timeout) without the negotiation taking place, so the accounting of sdtrpending and wdtrpending gets screwed up. In the wide case, if we tag it to do both wdtr and sdtr, it only performs wdtr (since wdtr must occur first and we spread out the negotiation over two commands) so we always have sdtrpending set for that target and we never do a real SDTR. I fill properly fix the accounting after 2.0.5 goes out the door, but this works (as confirmed by Dan) on wide targets. Other stuff that is also included: 1) Don't do a bzero when recycling SCBs. The only thing that must explicitly be set to zero is the scb control byte which is done in ahc_get_scb. We also need to set the SG_list_pointer and SG_list_count to 0 for commands that do not transfer data. 2) Mask the interrupt type printout for the aic7870 case. The bit we were using to determine interrupt type is only valid for the aic7770. Submitted by: Justin Gibbs
1995-05-17 07:06:02 +00:00
mvi DINDIR, MAX_OFFSET_8BIT
jmp mk_sdtr_done
wmax_offset:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi DINDIR, MAX_OFFSET_16BIT
Major overhaul of the aic7xxx driver: - Report valid residual byte counts. We actually pause the sequencer when the residual is non-zero. I thought about using DMA to do this, bus sequencer program space is tight. - Fix embarassing off by one error in the computation of a 2's compliment variable. This was most likely the cause of the many problems reported with the tagged queuing code. - Handle "MAX_SYNC" as a special case (ie we are the ones starting the sync negotiation sequence). This was done so that the target scratch area can be initialed to 0 offset (asyncronous transfers) safely. The initialization to 0 (was 15) is necessary since in some cases a Wide negotiation could run into problems if SCSIRATE was set wrong and we went into data(in/out). - Trim the DMA routines a little by using some procedures. Net effect is more functionality with 3 less instructions after this update. - Toggle the WIDEODD bit of the DFCNTRL whenever this is not the last SG block. It has no effect in the 8bit bus configuration, but in the Wide configuration ensures that the overlap byte is held in the SCSI block if the transfer is odd so it will end up in the next SG (the correct behavior).
1995-03-31 14:06:02 +00:00
jmp mk_sdtr_done
mk_wdtr_16bit:
mvi ARG_1,BUS_16_BIT
mk_wdtr:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
mvi DINDIR,1 /* extended message */
mvi DINDIR,2 /* extended message length = 2 */
mvi DINDIR,3 /* WDTR code */
mov DINDIR,ARG_1 /* bus width */
Major overhaul of the aic7xxx driver: - Report valid residual byte counts. We actually pause the sequencer when the residual is non-zero. I thought about using DMA to do this, bus sequencer program space is tight. - Fix embarassing off by one error in the computation of a 2's compliment variable. This was most likely the cause of the many problems reported with the tagged queuing code. - Handle "MAX_SYNC" as a special case (ie we are the ones starting the sync negotiation sequence). This was done so that the target scratch area can be initialed to 0 offset (asyncronous transfers) safely. The initialization to 0 (was 15) is necessary since in some cases a Wide negotiation could run into problems if SCSIRATE was set wrong and we went into data(in/out). - Trim the DMA routines a little by using some procedures. Net effect is more functionality with 3 less instructions after this update. - Toggle the WIDEODD bit of the DFCNTRL whenever this is not the last SG block. It has no effect in the 8bit bus configuration, but in the Wide configuration ensures that the overlap byte is held in the SCSI block if the transfer is odd so it will end up in the next SG (the correct behavior).
1995-03-31 14:06:02 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
add MSG_LEN,COMP_MSG0,DINDEX ret /* update message length */
Major overhaul of the aic7xxx driver: - Report valid residual byte counts. We actually pause the sequencer when the residual is non-zero. I thought about using DMA to do this, bus sequencer program space is tight. - Fix embarassing off by one error in the computation of a 2's compliment variable. This was most likely the cause of the many problems reported with the tagged queuing code. - Handle "MAX_SYNC" as a special case (ie we are the ones starting the sync negotiation sequence). This was done so that the target scratch area can be initialed to 0 offset (asyncronous transfers) safely. The initialization to 0 (was 15) is necessary since in some cases a Wide negotiation could run into problems if SCSIRATE was set wrong and we went into data(in/out). - Trim the DMA routines a little by using some procedures. Net effect is more functionality with 3 less instructions after this update. - Toggle the WIDEODD bit of the DFCNTRL whenever this is not the last SG block. It has no effect in the 8bit bus configuration, but in the Wide configuration ensures that the overlap byte is held in the SCSI block if the transfer is odd so it will end up in the next SG (the correct behavior).
1995-03-31 14:06:02 +00:00
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
/*
* Set SCSI bus control signal state. This also saves the last-written
* value into a location where the higher-level driver can read it - if
* it has to send an ABORT or RESET message, then it needs to know this
* so it can assert ATN without upsetting SCSISIGO. The new value is
* expected in SINDEX. Change the actual state last to avoid contention
* from the driver.
*/
John Aycock's aic7770 sequencer code and assembler. There is currently a discussion going on about removing this code from the burden of the GPL, but it won't happen before Beta, and this code should be tested before release. Supports 27/2842 class adaptec cards and is almost capable of supporting aic7870 based adapters (294X series cards). It does not support Wide controllers or the second channel on Twin boards although I have work in progress on getting both channels and running. I have also added a few performance improvements to this version that give us approximately a 25% boost over the original driver. These patches have been submitted to the author. Obtained from: Linux aic7770 driver (John Aycock - aycock@cpsc.ucalgary.ca)
1994-11-17 20:19:10 +00:00
scsisig:
mov SIGSTATE,SINDEX
mov SCSISIGO,SINDEX ret
Full support for 294x and Wide devices. Fixed month old bug in the SCSI sense retrieval code that messed up CDROM devices. This code will also responde correctly to SDTR and WDTR messages from devices that start a negotiation sequence.
1995-01-13 02:22:11 +00:00
sdtr_to_rate:
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
call ndx_dtr /* index scratch space for target */
Full support for 294x and Wide devices. Fixed month old bug in the SCSI sense retrieval code that messed up CDROM devices. This code will also responde correctly to SDTR and WDTR messages from devices that start a negotiation sequence.
1995-01-13 02:22:11 +00:00
shr A,SINDIR,0x4
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
dec SINDEX /* Preserve SINDEX */
Full support for 294x and Wide devices. Fixed month old bug in the SCSI sense retrieval code that messed up CDROM devices. This code will also responde correctly to SDTR and WDTR messages from devices that start a negotiation sequence.
1995-01-13 02:22:11 +00:00
and A,0x7
clr RETURN_1
sdtr_to_rate_loop:
test A,0x0f jz sdtr_to_rate_done
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
add RETURN_1,0x19
Full support for 294x and Wide devices. Fixed month old bug in the SCSI sense retrieval code that messed up CDROM devices. This code will also responde correctly to SDTR and WDTR messages from devices that start a negotiation sequence.
1995-01-13 02:22:11 +00:00
dec A
jmp sdtr_to_rate_loop
sdtr_to_rate_done:
shr RETURN_1,0x2
The long awaited stability patch set for the aic7xxx driver: 1) Use cpp to preprocess the sequencer code. 2) Convert all "magic numbers" to #defines shared by the sequencer and kernel driver via the aic7xxx_reg.h file. (The assembler still needs to be re-written in lex/yacc to allow ~|& type constructions). 3) Raise ATN on parity errors for "in" phases and send an initiator detected error or message-in parity error message as appropriate. 4) Turn off the reselection hardware from the time or a (re)connection to busfree. It seems that some fast targets were able to reconnect before the sequencer was able to see busfree. 5) The message buffer is considered "in-use" when there is a positive length count. The ACTIVE_MSG flag was unnecesary. 6) Properly set SCB_NEXT_WAITING to SCB_LIST_HEAD in scbs being added to the waiting scb list. This is a change in how the list code works to facilitate some planned work in the reset code. 7) The fields in the SCB have be re-arranged to be quad-word aligned. 8) The inb code has been rewritten to catch phasemisses and be more efficient. 9) Go back to "snooping the bus" to determine if the incomming identify message will be followed by a simple queue message. Its much faster than doing a search through the SCBs. 10) Implement better tag range checking for incomming tags. 11) Make sdtr_to_rate more accurate (use 25 instead of 24 in calculations - must have been asleep that night). 12) Rearrange some routines to reduce code complexity and size. 13) Update comments and formatting. 14) Fixed bugs I've forgotten about?? Reviewed by: David Greenman <davidg@FreeBSD.org>
1996-01-03 06:25:32 +00:00
add RETURN_1,0x19
Set SCSIGO generically before we determine the phase instead of doing it in each phase routine. Saves a few instructions. Be more careful in how we deal with SXFRCTL0. Or in the control bits of interest instead of using mvi. The kernel driver will set the ULTRAEN bit of SXFRCTL0 if we are using Ultra (20MHz) mode and we don't want to clobber it. In sdtr_to_rate divide by two if we are in ultra mode to get the correct setting since its a 20MHz instead of 10MHz scale.
1995-10-26 23:54:13 +00:00
test SXFRCTL0,ULTRAEN jz return
shr RETURN_1,0x1
Major overhaul of the aic7xxx driver: - Report valid residual byte counts. We actually pause the sequencer when the residual is non-zero. I thought about using DMA to do this, bus sequencer program space is tight. - Fix embarassing off by one error in the computation of a 2's compliment variable. This was most likely the cause of the many problems reported with the tagged queuing code. - Handle "MAX_SYNC" as a special case (ie we are the ones starting the sync negotiation sequence). This was done so that the target scratch area can be initialed to 0 offset (asyncronous transfers) safely. The initialization to 0 (was 15) is necessary since in some cases a Wide negotiation could run into problems if SCSIRATE was set wrong and we went into data(in/out). - Trim the DMA routines a little by using some procedures. Net effect is more functionality with 3 less instructions after this update. - Toggle the WIDEODD bit of the DFCNTRL whenever this is not the last SG block. It has no effect in the 8bit bus configuration, but in the Wide configuration ensures that the overlap byte is held in the SCSI block if the transfer is odd so it will end up in the next SG (the correct behavior).
1995-03-31 14:06:02 +00:00
return:
ret
Reference in New Issue Copy Permalink