Author: mav
Date: Sun Nov 10 23:34:32 2013
New Revision: 257930
URL: http://svnweb.freebsd.org/changeset/base/257930
Log:
Some more registers access optimizations:
- Process ATIO queue only if interrupt status tells so;
- Do not update queue out pointers after each processed command, do it
only once at the end of the loop.
Modified:
head/sys/dev/isp/isp.c
Modified: head/sys/dev/isp/isp.c
==============================================================================
--- head/sys/dev/isp/isp.c Sun Nov 10 23:00:39 2013 (r257929)
+++ head/sys/dev/isp/isp.c Sun Nov 10 23:34:32 2013 (r257930)
@@ -5082,7 +5082,9 @@ again:
/*
* Check for ATIO Queue entries.
*/
- if (IS_24XX(isp)) {
+ if (IS_24XX(isp) &&
+ ((isr & BIU2400_R2HST_ISTAT_MASK) == ISP2400R2HST_ATIO_RSPQ_UPDATE
||
+ (isr & BIU2400_R2HST_ISTAT_MASK) ==
ISP2400R2HST_ATIO_RQST_UPDATE)) {
iptr = ISP_READ(isp, BIU2400_ATIO_RSPINP);
optr = isp->isp_atioodx;
@@ -5107,9 +5109,11 @@ again:
break;
}
optr = ISP_NXT_QENTRY(oop, RESULT_QUEUE_LEN(isp));
+ }
+ if (isp->isp_atioodx != optr) {
ISP_WRITE(isp, BIU2400_ATIO_RSPOUTP, optr);
+ isp->isp_atioodx = optr;
}
- isp->isp_atioodx = optr;
}
#endif
@@ -5284,7 +5288,6 @@ again:
optr = ISP_NXT_QENTRY(tsto,
RESULT_QUEUE_LEN(isp));
}
if (r > 0) {
- ISP_WRITE(isp, isp->isp_respoutrp, optr);
ISP_MEMZERO(hp, QENTRY_LEN); /* PERF */
last_etype = etype;
continue;
@@ -5319,7 +5322,6 @@ again:
if (sp->req_header.rqs_flags & RQSFLAG_MASK) {
if (sp->req_header.rqs_flags & RQSFLAG_CONTINUATION) {
isp_print_bytes(isp, "unexpected continuation
segment", QENTRY_LEN, sp);
- ISP_WRITE(isp, isp->isp_respoutrp, optr);
last_etype = etype;
continue;
}
@@ -5343,7 +5345,6 @@ again:
}
if (sp->req_header.rqs_flags & RQSFLAG_BADORDER) {
isp_print_bytes(isp, "invalid IOCB ordering",
QENTRY_LEN, sp);
- ISP_WRITE(isp, isp->isp_respoutrp, optr);
last_etype = etype;
continue;
}
@@ -5352,7 +5353,6 @@ again:
if (!ISP_VALID_HANDLE(isp, sp->req_handle)) {
isp_prt(isp, ISP_LOGERR, "bad request handle 0x%x (iocb
type 0x%x)", sp->req_handle, etype);
ISP_MEMZERO(hp, QENTRY_LEN); /* PERF */
- ISP_WRITE(isp, isp->isp_respoutrp, optr);
last_etype = etype;
continue;
}
@@ -5369,7 +5369,6 @@ again:
isp_prt(isp, ISP_LOGERR, "cannot find handle
0x%x (status 0x%x)", sp->req_handle, ts);
}
ISP_MEMZERO(hp, QENTRY_LEN); /* PERF */
- ISP_WRITE(isp, isp->isp_respoutrp, optr);
last_etype = etype;
continue;
}
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