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Re-enable reselections as the first thing after we see a bus free. We seem

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to miss reselections from some devices and since the reselection response
timeout is only 200ns, enabling reselections too late may be the cause of our
problem.
This commit is contained in:
Justin T. Gibbs 1996-12-03 17:04:51 +00:00
parent 673f8923d0
commit 3d9ab968cd
1 changed files with 8 additions and 10 deletions
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18
sys/dev/aic7xxx/aic7xxx.seq
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@ -39,7 +39,7 @@
*
*-M************************************************************************/
VERSION AIC7XXX_SEQ_VER "$Id: aic7xxx.seq,v 1.50 1996/11/21 06:18:33 gibbs Exp $"
VERSION AIC7XXX_SEQ_VER "$Id: aic7xxx.seq,v 1.51 1996/11/22 08:25:20 gibbs Exp $"
#if defined(__NetBSD__)
#include "../../../../dev/ic/aic7xxxreg.h"
@ -84,16 +84,14 @@ reset:
clr SCSISIGO /* De-assert BSY */
p_busfree:
mvi LASTPHASE, P_BUSFREE
start:
and FLAGS,0x07 /* clear target specific flags */
mvi SCSISEQ,ENRSELI /* Always allow reselection */
clr SCSIRATE /*
* We don't know the target we will
* connect to, so default to narrow
* transfers to avoid parity problems.
*/
mvi LASTPHASE, P_BUSFREE
and FLAGS,0x07 /* clear target specific flags */
poll_for_work:
/*
* Are we a twin channel device?
@ -550,13 +548,13 @@ 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_dropatn:
cmp DINDEX,1 jne p_mesgout_testretry /* last byte? */
mvi CLRSINT1,CLRATNO /* drop ATN */
p_mesgout_testretry:
test DINDEX,0xff jnz p_mesgout_outb
test DINDEX,0xff jnz p_mesgout_dropatn
or SCSISIGO,ATNO /* turn on ATN for the retry */
jmp p_mesgout_start
p_mesgout_dropatn:
cmp DINDEX,1 jne p_mesgout_outb /* last byte? */
mvi CLRSINT1,CLRATNO /* drop ATN */
p_mesgout_outb:
dec DINDEX
mvi CLRSINT0, CLRSPIORDY
@ -777,7 +775,7 @@ mesgin_identify:
*/
mvi ARG_1,SCB_LIST_NULL /* Default to no-tag */
snoop_tag_loop:
test SSTAT0,SPIORDY jz snoop_tag_loop
test SSTAT1,REQINIT jz snoop_tag_loop
test SSTAT1,PHASEMIS jnz use_findSCB
mvi A call inb_first
cmp A,MSG_SIMPLE_Q_TAG jne use_findSCB