Commit Graph

38 Commits

Author SHA1 Message Date
gibbs
eb2e3ded12 Correct pedantic errors in arrays generated by the assembler (trailing
comma in array declarations).

Output a constant indicating the number of critical section entries
in the firmware.
2000-10-05 04:25:42 +00:00
gibbs
d98dfab164 Add Perforce RCSIDs for easy revision correlation to my local tree.
Add support for constructing a table of critical section regions in
the firmware image.  The kernel driver will soon have support for
single stepping the sequencer outside of a critical region prior
to starting exception handling.
2000-09-22 22:19:55 +00:00
gibbs
0352a10958 Move aicasm to its own subdirectory. 2000-09-16 20:02:39 +00:00
gibbs
3c297571e4 o Convert to <inttypes.h> style fixed sized types to facilitate porting to
other systems.

 o Normalize copyright text.

 o Clean up probe code function interfaces by passing around a single
   structure of common arguments instead of passing "too many" args
   in each function call.

 o Add support for the AAA-131 as a SCSI adapter.

 o Add support for the AHA-4944 courtesy of "Matthew N. Dodd" <winter@jurai.net

 o Correct manual termination support for PCI cards.  The bit definitions
   for manual termination control in the SEEPROM were incorrect.

 o Add support for extracting NVRAM information from SCB 2 for BIOSen
   that use this mechanism to pass this data to OS drivers.

 o Properly set the STPWLEVEL bit in PCI config space based on the
   setting in an SEEPROM.

 o Go back to useing 32byte SCBs for all controllers.  The current
   firmware allows us to embed 12byte cdbs on all controllers in
   a 32byte SCB, and larger cdbs are rarely used, so it is a
   better use of this space to offer more SCBs (32).

 o Add support for U160 transfers.

 o Add an idle loop executed during data transfers that prefetches
   S/G segments on controllers that have a secondary DMA engine
   (aic789X).

 o Improve the performance of reselections by avoiding an extra
   one byte DMA in the case of an SCB lookup miss for the reselecting
   target.  We now keep a 16byte "untagged target" array on the card
   for dealing with untagged reselections.  If the controller has
   external SCB ram and can support 64byte SCBs, then we use an
   "untagged target/lun" array to maximize concurrency.  Without
   external SCB ram, the controller is limited to one untagged
   transaction per target, auto-request sense operations excluded.

 o Correct the setup of the STPWEN bit in SXFRCTL1.  This control
   line is tri-stated until set to one, so set it to one and then
   set it to the desired value.

 o Add tagged queuing support to our target role implementation.

 o Handle the common cases of the ignore wide residue message
   in firmware.

 o Add preliminary support for 39bit addressing.

 o Add support for assembling on big-endian machines.  Big-endian
   support is not complete in the driver.

 o Correctly remove SCBs in the waiting for selection queue when
   freezing a device queue.

 o Now that we understand more about the autoflush bug on the
   aic7890, only use the workaround on devices that need it.

 o Add a workaround for the "aic7890 hangs the system when you
   attempt to pause it" problem.  We can now pause the aic7890
   safely regardless of what instruction it is executing.
2000-07-18 20:12:14 +00:00
obrien
db6962481c Use /sys/sys/*.h over /usr/include/sys.
No repsonce from:	Maintainer
2000-05-27 21:35:47 +00:00
jake
961b97d434 Back out the previous change to the queue(3) interface.
It was not discussed and should probably not happen.

Requested by:		msmith and others
2000-05-26 02:09:24 +00:00
jake
d93fbc9916 Change the way that the queue(3) structures are declared; don't assume that
the type argument to *_HEAD and *_ENTRY is a struct.

Suggested by:	phk
Reviewed by:	phk
Approved by:	mdodd
2000-05-23 20:41:01 +00:00
gibbs
09d56a3f8f Simplify my copyright license terms.
aic7xxx.c:
	Add a function for sucking firmware out of the controller
	prior to reset.

	Remove some inline bloat from functions that should not have
	been inlined.

	During initialization, wait 1ms after the chip reset before
	touching any registers.  You can get machine checks on certain
	architectures (Atari I think?) without the delay.

	Return CAM_REQ_CMP for external BDR requests instead
	of CAM_BDR_SENT.

	Bump some messages to bootverbose levels above 1.

	Don't clear any negotiated sync rate if the target rejects
	a WDTR message.  The sync rate is only cleared if the target
	accepts a WDTR message.

	Fix a small bug in the mesgin handling code that could cause
	us to believe that we had recieved a message that was actually
	received by another target.  This could only confuse us in
	some very rare transmission negotiation scenarios.

	Remove some unecessary cleanup of residual information after
	a residual is reported.  The sequencer does this when the
	command is queued now.
1999-12-06 18:23:31 +00:00
peter
3b842d34e8 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
gibbs
82cbbc338a Fix a few compiler nits.
Submitted by:	Bill Fumerola <billf@jade.chc-chimes.com>
1999-08-16 22:42:33 +00:00
gibbs
405e2ed769 Complete conversion to bus dma. This driver now works on the alpha.
aicasm_symbol.c:
	Correct an unaligned access problem.  You can't rely on DB to
	store your data in an aligned fashion.
1999-04-23 23:27:31 +00:00
gibbs
d57cb059af Use TCL_CHANNEL/SCSI_ID/etc. macros in more locations.
Don't mess with the IRQMS bit in the host control register unless
we are an aic7770 chip.

Use calling context to determine if the card is already paused when
we update the target message request bit field in controller scratch
ram.  Looking at the paused bit in the HCNTRL register opened up a
race condition.

Insert delays in the target message request update routine as a temporary
work around for what looks like a chip bug.  I'm still investigating this
one.

Fix the Abort/Abort Tag/BDR handler to pull its message from the message
buffer in our softc instead of attempting to get it from a register on
the controller.  The message is never recorded by the controller in the
new message scheme.

Don't rely on having an SCB when a BDR occurs.  We can issue these during
invalid reconnects to.

Fix a few cases where we were restarting the sequencer but then still
falling out of a switch statement to unpause the sequencer again.
This could cause us to mess up sequencer state if it generated another
pausing interrupt between the time of the restart and unpause.

Kill the 'transceiver settle' loop during card initialization.  I
failed to realize that a controller that is not connected to any
cables will never settle or enable the SCSI transceivers at all.
The correct solution is to monitor the IOERR interrupt which indicates
that the transceiver state has changed (UW<->LVD).

Modify the aic7xxx assembler to properly echo input when stdin is not
a tty.
1999-03-23 07:24:29 +00:00
peter
af2c03a79e "fix" long standing aicasm build glitch. The problem was the
reorganization in rev 1.16 of i386/include/types.h which changed
stdlib.h's use of <machine/types.h>.  The problem was the -I. was causing
machine/types.h to come from the current kernel source, while stdlib.h was
coming from /usr/include.  /usr/include/stdlib.h is as old as the last
'make world', the machine/types.h was as new as the current source.
1999-01-17 19:56:02 +00:00
gibbs
3e9f8a5d64 Revamp the way that exceptional message handling is performed so that it
is more robust and common code can be used for both the target and iniator
roles.  The mechanism for tracking negotiation state has also been simplified.

Add support for sync/wide negotiation in target mode and fix many of
the target mode bugs running at higher speeds uncovered.  Make a first
stab at getting all of the bus skew delays correct.  Sync+Wide dataout
transfers still cause problems, but this may be an initiator problem.

Ensure that we exit BITBUCKET mode if the controller is restarted.

Add support for target mode only firmware downloads.  This has been
tested on the aic7880, but should mean that we can perform target mode
on any aic7xxx controller.  Mixed mode (initiator and target roles in
the same firmware load) is currently only supported on the aic7890, but
with optimization, may fit on chips with less instruction space.
1998-12-10 04:14:50 +00:00
gibbs
b845ffee80 Massive overhaul of the aic7xxx driver:
- Convert to CAM
 - Use a new DMA based queuing and paging scheme
 - Add preliminary target mode support
 - Add support for the aic789X chips
 - Take advantage of external SRAM on more controllers.
 - Numerous bug fixes and performance improvements.
1998-09-15 07:24:17 +00:00
gibbs
b9404180a2 Add support to aicasm for "downloaded constants". These are immediate
operands that are set during seqeuncer program download instead of at
assembly time.

Convert the sequencer code to use" downloaded constants" for four run time
constants that vary depending on the board type.  This frees up 4 bytes
of sequencer scratch ram space where these constants used to be stored and
also removes the additional instructions required to load their values
into the accumulator prior to using them.

Remove the REJBYTE sram variable.  The host driver can just as easly
read the accumulator to get this value.

The scratch ram savings is important as the old code used to clober the
SCSICONF register on 274X cards which sits near the top of scratch ram
space.  The SCSICONF register controls bus termination, and clobbering
it is not a good thing.  Now we have 4 bytes to spare.

This should fix the reported problems with cards that don't have devices
attached to them failing with a stream of "Somone reset bus X" messages.

Doug Ledford determined the cause of the problem, fixes by me.
1997-09-27 19:37:31 +00:00
gibbs
a3da742b72 Make the aic7xxx sequencer assembler compile in the kernel's object
directory.  Rename (via repository copy) some files so that the potential
for future conflicts is minimized.

PR: conf/4363
1997-09-03 03:44:58 +00:00
gibbs
7ebb73022c Modify my copyright notice to allow the sequencer to be used with GPLed
software (aka Linux).

Fix a few bugs in the sequencer assembler.

Make it easy to compiler the assembler with debugging turned on.
1997-06-27 19:38:56 +00:00
gibbs
3ab172303a aic7xxx.seq:
Be consistant about testing for parity errors after waiting for a
	REQ on the bus.

	Don't ack the last byte in a transaction until after we've cleared
	all target state.

aic7xxx_asm.c:
	Test the return value of getopt against -1 not EOF. (Yet another
	shameless victum of the style guide being wrong).
1997-04-10 19:13:07 +00:00
gibbs
cdcc5e68ea CFLAGS += -I. so that building in an obj directory works. 1997-04-03 05:56:00 +00:00
gibbs
b15d6bfc29 aic7xxx.seq:
Stick 4 more, twin channel only, instructions behind
	.if ( TWIN_CHANNEL)

aic7xxx_asm.c:
	Add the -O options which allows the specification of which options
	to include in a program listing.  This makes it possible to easily
	determine the address of any instruction in the program across
	different hardware/option configurations.  Updated usage() as well.
1997-03-18 19:18:39 +00:00
bde
4a1a18b668 Don't depend on <sys/types.h> being (bogusly) included by <stdio.h>. 1997-03-16 17:31:59 +00:00
gibbs
8c166fc240 Missed one. 1997-03-16 07:28:30 +00:00
gibbs
40f591dab8 Makefile gram.y scan.l sequencer.h symbol.c symbol.h aic7xxx_asm.c:
New sequencer assembler for the aic7xxx adapters.  This assembler
	performs some amount of register type checking, allows bit
	manipulation of symbolic constants, and generates "patch tables"
	for conditionalized downloading of portions of the program.
	This makes it easier to take full advantage of the different
	features of the aic7xxx cards without imposing run time penalies
	or being bound to the small memory footprints of the low end
	cards for features like target mode.

aic7xxx.reg:
	New, assembler parsed, register definitions fo the aic7xxx cards.
	This was done primarily in anticipation of 7810 support which
	will have a different register layout, but should be able to use
	the same assembler.  The kernel aic7xxx driver consumes a generated
	file in the compile directory to get the definitions of the register
	locations.

aic7xxx.seq:
	Convert to the slighly different syntax of the new assembler.

	Conditionalize SCB_PAGING, ultra, and twin features which shaves
	quite a bit of space once the program is downloaded.

	Add code to leave the selection hardware enabled during reconnects
	that win bus arbitration.  This ensures that we will rearbitrate
	as soon as the bus goes free instead of delaying for a bit.

	When we expect the bus to go free, perform all of the cleanup
	associated with that event "up front" and enter a loop awaiting
	bus free.  If we see a REQ first, complain, but attempt to
	continue.  This will hopefully address, or at least help diagnose,
	the "target didn't send identify" messages that have been reported.

Spelling corrections obtained from NetBSD.
1997-03-16 07:08:19 +00:00
peter
94b6d72794 Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not
ready for it yet.
1997-02-22 09:48:43 +00:00
jkh
808a36ef65 Make the long-awaited change from $Id$ to $FreeBSD$
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore.  This update would have been
insane otherwise.
1997-01-14 07:20:47 +00:00
gibbs
52d94c6588 aic7xxx.seq:
Fix support for the aic7850 by looking only at the relavent bits of the
    QINCNT.  The 7850 puts random garbage in the high bits and all my attempts
    to determine the cause of this failed.  This approach does seem to work
    around the problem.

    Don't trust SCSIPERR to tell us when there is a parity error.  On
    some revs of the 7870 and the 7880, this bit follows the parity of
    the current byte.  Instead of using a SEQINT to tell the kernel,
    re-enable the standard parity error interrupt since it seems to pause
    the sequencer right at the time of the error which is the effect we were
    looking for anyway.

aic7xxx_reg.h:
    Remove PARITY_ERROR seqeuncer interrupt type, its no longer used.

    Define QCOUNTMASK as the SRAM location for the mask to use on the
    QINCNT register.  QCOUNTMASK is determined by the number of SCBs
    supported by the device we're working on.

aic7xxx_asm.c
    Properly check the return value of fopen, and define the arg list
    in getopt correctly.
    Submitted by: Pete Bentley <pete@demon.net>
1996-03-31 03:02:37 +00:00
gibbs
2752676cef Null terminate execl's argument list.
Submitted by: Ron Lenk <rlenk@widget.xmission.com>
1996-01-05 01:48:07 +00:00
gibbs
88f703b1f5 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
rgrimes
c86f0c7a71 Remove trailing whitespace. 1995-05-30 08:16:23 +00:00
gibbs
a162827e0a John Aycock's BSD copyrighted sequencer assembler and sequencer code. This
is identical to the older version, just the copyright has changed.  Many
thanks go to Dean Gehnert of the Linux camp who went the extra mile to make
this happen.

Other changes:

Update assembler man page to include the -v and -D options

Merge in Dean's latest changes to the assembler

Have the sequencer do a MSG_REJECT when the negotiated syncronous rate
is lower than the adapter supports.  This forces asyncronous mode which
is faster at these rates anyway.

This code will be moved shortly to the non-gpld portion of the tree.
1995-04-15 21:45:56 +00:00
gibbs
1b4e85be4d 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
gibbs
0be8d9c7f6 Make the aic7xxx assembler take quoted strings as a single token.
Make $Id the version variable which required the quoted string "feature".
1995-03-17 23:54:17 +00:00
gibbs
d8e71b2594 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
gibbs
1ce8bad19c 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
gibbs
eb88c4ab62 Previous changes to the sequencer compiler backed out. We go back to
generating the .h file, and a pregenerated file is included.
1994-11-18 09:11:35 +00:00
jkh
7314812120 Make the compiler spit out a .c file instead of a .h file. 1994-11-18 08:17:20 +00:00
gibbs
fcb10df734 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