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Code Issues Releases Activity

Simplify ORB queue management.

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Don't send doorbell and send ORB pointer only if it's necessary.
This reduces bus traffic and interrupts much.
This commit is contained in:
Hidetoshi Shimokawa 2003-03-03 15:27:29 +00:00
parent ebe789d61c
commit 46ce9fefe5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=111819
1 changed files with 19 additions and 26 deletions
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45
sys/dev/firewire/sbp.c
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@ -178,9 +178,6 @@ struct sbp_ocb {
};
#define OCB_ACT_MGM 0
#define OCB_ACT_CMD 1
#define OCB_ACT_MASK 3
#define OCB_RESERVED 0x10
#define OCB_DONE 0x20
#define OCB_MATCH(o,s) (vtophys(&(o)->orb[0]) == ntohl((s)->orb_lo))
@ -1158,6 +1155,7 @@ END_DEBUG
}
}
#if 0
static void
sbp_doorbell(struct sbp_dev *sdev)
{
@ -1176,6 +1174,7 @@ END_DEBUG
fp->mode.wreqq.data = htonl(0xf);
fw_asyreq(xfer->fc, -1, xfer);
}
#endif
static struct fw_xfer *
sbp_write_cmd(struct sbp_dev *sdev, int tcode, int offset)
@ -1560,7 +1559,8 @@ END_DEBUG
ocb = sbp_dequeue_ocb(sdev, sbp_status);
if (ocb == NULL) {
sbp_show_sdev_info(sdev, 2);
printf("No ocb on the queue\n");
printf("No ocb(%x) on the queue\n",
ntohl(sbp_status->orb_lo));
}
break;
case 2:
@ -1637,7 +1637,7 @@ END_DEBUG
case ORB_FMT_VED:
break;
case ORB_FMT_STD:
switch(ocb->flags & OCB_ACT_MASK){
switch(ocb->flags) {
case OCB_ACT_MGM:
orb_fun = ntohl(ocb->orb[4]) & ORB_FUN_MSK;
switch(orb_fun) {
@ -1743,8 +1743,7 @@ printf("len %d\n", sbp_status->len);
}
}
if (!(ocb->flags & OCB_RESERVED))
sbp_free_ocb(sbp, ocb);
sbp_free_ocb(sbp, ocb);
done:
if (reset_agent)
sbp_agent_reset(sdev);
@ -2387,9 +2386,7 @@ END_DEBUG
ccb = ocb->ccb;
prev = sbp_enqueue_ocb(ocb->sdev, ocb);
if (prev)
sbp_doorbell(ocb->sdev);
else
if (prev == NULL)
sbp_orb_pointer(ocb->sdev, ocb);
}
@ -2421,10 +2418,7 @@ SBP_DEBUG(1)
END_DEBUG
if (OCB_MATCH(ocb, sbp_status)) {
/* found */
if (ocb->flags & OCB_RESERVED)
ocb->flags |= OCB_DONE;
else
STAILQ_REMOVE(&sdev->ocbs, ocb, sbp_ocb, ocb);
STAILQ_REMOVE(&sdev->ocbs, ocb, sbp_ocb, ocb);
if (ocb->ccb != NULL)
untimeout(sbp_timeout, (caddr_t)ocb,
ocb->ccb->ccb_h.timeout_ch);
@ -2433,16 +2427,11 @@ END_DEBUG
ocb->dmamap);
ocb->dmamap = NULL;
}
if (next != NULL && sbp_status->src == 1)
sbp_orb_pointer(sdev, next);
break;
} else {
if ((ocb->flags & OCB_RESERVED) &&
(ocb->flags & OCB_DONE)) {
/* next orb must be fetched already */
STAILQ_REMOVE(&sdev->ocbs, ocb, sbp_ocb, ocb);
sbp_free_ocb(sdev->target->sbp, ocb);
} else
order ++;
}
} else
order ++;
}
splx(s);
SBP_DEBUG(0)
@ -2484,7 +2473,6 @@ SBP_DEBUG(1)
#endif
vtophys(&ocb->orb[0]));
END_DEBUG
prev->flags |= OCB_RESERVED;
prev->orb[1] = htonl(vtophys(&ocb->orb[0]));
prev->orb[0] = 0;
}
@ -2535,11 +2523,16 @@ sbp_abort_ocb(struct sbp_ocb *ocb, int status)
sdev = ocb->sdev;
SBP_DEBUG(1)
sbp_show_sdev_info(sdev, 2);
printf("sbp_abort_ocb 0x%x\n", status);
#if __FreeBSD_version >= 500000
printf("sbp_abort_ocb 0x%tx\n",
#else
printf("sbp_abort_ocb 0x%x\n",
#endif
vtophys(&ocb->orb[0]));
if (ocb->ccb != NULL)
sbp_print_scsi_cmd(ocb);
END_DEBUG
if (ocb->ccb != NULL && !(ocb->flags & OCB_DONE)) {
if (ocb->ccb != NULL) {
untimeout(sbp_timeout, (caddr_t)ocb,
ocb->ccb->ccb_h.timeout_ch);
ocb->ccb->ccb_h.status = status;