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Allow to change number of openings (used tags) for ATA/SATA devices

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via `camcontrol tags ... -N ...`.  There is no need to tune it in
usual cases, but some users want to have it for debugging purposes.

MFC after:	2 weeks
This commit is contained in:
Alexander Motin 2012-05-29 14:28:46 +00:00
parent a86227d176
commit 7dc3213da1
2 changed files with 15 additions and 15 deletions
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12
sys/cam/ata/ata_xpt.c
View File

@ -65,6 +65,7 @@ struct ata_quirk_entry {
struct scsi_inquiry_pattern inq_pat;
u_int8_t quirks;
#define CAM_QUIRK_MAXTAGS 0x01
u_int mintags;
u_int maxtags;
};
@ -153,7 +154,7 @@ static struct ata_quirk_entry ata_quirk_table[] =
T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED,
/*vendor*/"*", /*product*/"*", /*revision*/"*"
},
/*quirks*/0, /*maxtags*/0
/*quirks*/0, /*mintags*/0, /*maxtags*/0
},
};
@ -1019,7 +1020,8 @@ noerror:
path->device->flags |= CAM_DEV_IDENTIFY_DATA_VALID;
}
if (ident_buf->satacapabilities & ATA_SUPPORT_NCQ) {
path->device->mintags = path->device->maxtags =
path->device->mintags = 2;
path->device->maxtags =
ATA_QUEUE_LEN(ident_buf->queue) + 1;
}
ata_find_quirk(path->device);
@ -1355,8 +1357,10 @@ ata_find_quirk(struct cam_ed *device)
quirk = (struct ata_quirk_entry *)match;
device->quirk = quirk;
if (quirk->quirks & CAM_QUIRK_MAXTAGS)
device->mintags = device->maxtags = quirk->maxtags;
if (quirk->quirks & CAM_QUIRK_MAXTAGS) {
device->mintags = quirk->mintags;
device->maxtags = quirk->maxtags;
}
}
typedef struct {

18
sys/cam/cam_xpt.c
View File

@ -2905,17 +2905,13 @@ xpt_action_default(union ccb *start_ccb)
if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
if (INQ_DATA_TQ_ENABLED(&dev->inq_data)) {
/* Don't ever go below one opening */
if (crs->openings > 0) {
xpt_dev_ccbq_resize(path,
crs->openings);
if (bootverbose) {
xpt_print(path,
"tagged openings now %d\n",
crs->openings);
}
/* Don't ever go below one opening */
if (crs->openings > 0) {
xpt_dev_ccbq_resize(path, crs->openings);
if (bootverbose) {
xpt_print(path,
"number of openings is now %d\n",
crs->openings);
}
}
}