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Add a prefix to be used for assembler generated tables and

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functions for register pretty-printing.

Only clear SELDO once we've recorded enough information for
the host to understand that the connection is valid.  The
host uses the SELDO status as a handshake to close this
race window.

Correct a bug in target mode handling of non-disconnected
transactions.  The host would indicate the correct SCB to
DMA by setting the SCB id in the currently selected hardware
SCB.  Unfortunately, we would then immediated allocate a
hardware SCB which, depending on the access patern might not
be the same hardware SCB that the host setup for us.  Avoid
this by having the host put the SCBID into scratch ram.
This commit is contained in:
Justin T. Gibbs 2002-08-31 06:43:15 +00:00
parent 264fafe657
commit 62cdfa05f2
1 changed files with 22 additions and 16 deletions
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38
sys/dev/aic7xxx/aic7xxx.seq
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@ -40,8 +40,9 @@
* $FreeBSD$
*/
VERSION = "$Id: //depot/aic7xxx/aic7xxx/aic7xxx.seq#40 $"
VERSION = "$Id: //depot/aic7xxx/aic7xxx/aic7xxx.seq#50 $"
PATCH_ARG_LIST = "struct ahc_softc *ahc"
PREFIX = "ahc_"
#include "aic7xxx.reg"
#include "scsi_message.h"
@ -389,13 +390,8 @@ initialize_scsiid:
}
/*
* Initialize transfer settings and clear the SCSI channel.
* SINDEX should contain any additional bit's the client wants
* set in SXFRCTL0. We also assume that the current SCB is
* a valid SCB for the target we wish to talk to.
* Initialize transfer settings with SCB provided settings.
*/
initialize_channel:
or SXFRCTL0, SPIOEN|CLRSTCNT|CLRCHN;
set_transfer_settings:
if ((ahc->features & AHC_ULTRA) != 0) {
test SCB_CONTROL, ULTRAENB jz . + 2;
@ -438,21 +434,29 @@ target_inb:
select_out:
/* Turn off the selection hardware */
and SCSISEQ, TEMODE|ENSELI|ENRSELI|ENAUTOATNP, SCSISEQ;
mvi CLRSINT0, CLRSELDO;
mov SCBPTR, WAITING_SCBH;
mov WAITING_SCBH,SCB_NEXT;
mov SAVED_SCSIID, SCB_SCSIID;
mov SAVED_LUN, SCB_LUN;
call initialize_channel;
call set_transfer_settings;
if ((ahc->flags & AHC_TARGETROLE) != 0) {
test SSTAT0, TARGET jz initiator_select;
or SXFRCTL0, CLRSTCNT|CLRCHN;
/*
* Put tag in connonical location since not
* all connections have an SCB.
*/
mov INITIATOR_TAG, SCB_TARGET_ITAG;
/*
* We've just re-selected an initiator.
* Assert BSY and setup the phase for
* sending our identify messages.
*/
mvi P_MESGIN|BSYO call change_phase;
mvi CLRSINT0, CLRSELDO;
/*
* Start out with a simple identify message.
@ -491,15 +495,16 @@ target_ITloop:
* on the state of NO_DISCONNECT.
*/
test SEQ_FLAGS, NO_DISCONNECT jz target_disconnect;
mov RETURN_1, ALLZEROS;
mvi TARG_IMMEDIATE_SCB, SCB_LIST_NULL;
call complete_target_cmd;
cmp RETURN_1, CONT_MSG_LOOP jne .;
if ((ahc->flags & AHC_PAGESCBS) != 0) {
mov ALLZEROS call get_free_or_disc_scb;
}
cmp TARG_IMMEDIATE_SCB, SCB_LIST_NULL je .;
mvi DMAPARAMS, HDMAEN|DIRECTION|FIFORESET;
mov SCB_TAG call dma_scb;
mov TARG_IMMEDIATE_SCB call dma_scb;
call set_transfer_settings;
or SXFRCTL0, CLRSTCNT|CLRCHN;
jmp target_synccmd;
target_mesgout:
@ -636,6 +641,7 @@ complete_target_cmd:
if ((ahc->flags & AHC_INITIATORROLE) != 0) {
initiator_select:
or SXFRCTL0, SPIOEN|CLRSTCNT|CLRCHN;
/*
* As soon as we get a successful selection, the target
* should go into the message out phase since we have ATN
@ -643,6 +649,7 @@ initiator_select:
*/
mvi MSG_OUT, MSG_IDENTIFYFLAG;
or SEQ_FLAGS, IDENTIFY_SEEN;
mvi CLRSINT0, CLRSELDO;
/*
* Main loop for information transfer phases. Wait for the
@ -1775,7 +1782,7 @@ mesgin_identify:
* transactions by first looking at the transaction stored in
* the busy target array. If there is no untagged transaction
* for this target or the transaction is for a different lun, then
* this must be an untagged transaction.
* this must be a tagged transaction.
*/
shr SINDEX, 4, SAVED_SCSIID;
and SAVED_LUN, MSG_IDENTIFY_LUNMASK, A;
@ -2217,9 +2224,9 @@ dma_scb_fromhost:
* available data to force the chip to
* continue the transfer. This does not
* happen for SCSI transfers as the SCSI module
* will drain the FIFO as data is made available.
* will drain the FIFO as data are made available.
* When the hang occurs, we know that a multiple
* of 8 bytes are in the FIFO because the PCI
* of 8 bytes is in the FIFO because the PCI
* module has an 8 byte input latch that only
* dumps to the FIFO when HCNT == 0 or the
* latch is full.
@ -2256,7 +2263,6 @@ dma_scb_hang_dma_done:
} else {
call dma_finish;
}
/* If we were putting the SCB, we are done */
call dfdat_in_8;
call dfdat_in_8;
call dfdat_in_8;