@@ -1208,17 +1208,14 @@ static int pm8001_init_ccb_tag(struct pm8001_hba_info *pm8001_ha)
struct Scsi_Host *shost = pm8001_ha->shost;
struct device *dev = pm8001_ha->dev;
u32 max_out_io, ccb_count;
- u32 can_queue;
int i;
max_out_io = pm8001_ha->main_cfg_tbl.pm80xx_tbl.max_out_io;
ccb_count = min_t(int, PM8001_MAX_CCB, max_out_io);
- /* Update to the scsi host*/
- can_queue = ccb_count - PM8001_RESERVE_SLOT;
- shost->can_queue = can_queue;
+ shost->can_queue = ccb_count - PM8001_RESERVE_SLOT;
- pm8001_ha->tags = bitmap_zalloc(ccb_count, GFP_KERNEL);
+ pm8001_ha->tags = bitmap_zalloc(PM8001_RESERVE_SLOT, GFP_KERNEL);
if (!pm8001_ha->tags)
goto err_out;
@@ -1244,9 +1241,10 @@ static int pm8001_init_ccb_tag(struct pm8001_hba_info *pm8001_ha)
pm8001_ha->ccb_info[i].task = NULL;
pm8001_ha->ccb_info[i].ccb_tag = PM8001_INVALID_TAG;
pm8001_ha->ccb_info[i].device = NULL;
- ++pm8001_ha->tags_num;
}
+ pm8001_ha->tags_num = PM8001_RESERVE_SLOT;
+
return 0;
err_out_noccb:
@@ -68,6 +68,11 @@ void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag)
void *bitmap = pm8001_ha->tags;
unsigned long flags;
+ if (tag < pm8001_ha->shost->can_queue)
+ return;
+
+ tag -= pm8001_ha->shost->can_queue;
+
spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags);
__clear_bit(tag, bitmap);
spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
@@ -92,6 +97,9 @@ int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out)
}
__set_bit(tag, bitmap);
spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
+
+ /* reserved tags are in the upper region of the tagset */
+ tag += pm8001_ha->shost->can_queue;
*tag_out = tag;
return 0;
}
@@ -737,9 +737,13 @@ pm8001_ccb_alloc(struct pm8001_hba_info *pm8001_ha,
struct pm8001_device *dev, struct sas_task *task)
{
struct pm8001_ccb_info *ccb;
+ struct request *rq = NULL;
u32 tag;
- if (pm8001_tag_alloc(pm8001_ha, &tag)) {
+ rq = sas_task_find_rq(task);
+ if (rq) {
+ tag = rq->tag;
+ } else if (pm8001_tag_alloc(pm8001_ha, &tag)) {
pm8001_dbg(pm8001_ha, FAIL, "Failed to allocate a tag\n");
return NULL;
}
The request associated with a scsi command coming from the block layer has a unique tag, so use that when possible for getting a CCB. Unfortunately we don't support reserved commands in the SCSI midlayer yet, so in the interim continue to manage those tags internally (along with tags for private commands). Signed-off-by: John Garry <john.garry@huawei.com> --- drivers/scsi/pm8001/pm8001_init.c | 10 ++++------ drivers/scsi/pm8001/pm8001_sas.c | 8 ++++++++ drivers/scsi/pm8001/pm8001_sas.h | 6 +++++- 3 files changed, 17 insertions(+), 7 deletions(-)