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scsi: ufs: ufshpb: Add HPB dev reset response 

The spec does not define what the host's recommended response is when the
device sends HPB dev reset response (oper 0x2).

Update all active HPB regions.

Link: https://lore.kernel.org/r/20210712095039.8093-8-avri.altman@wdc.com
Reviewed-by: Daejun Park <daejun7.park@samsung.com>
Signed-off-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Avri Altman 2021-07-12 12:50:34 +03:00 committed by Martin K. Petersen
parent 6f4ad14f0f
commit 67001ff171
2 changed files with 32 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
drivers/scsi/ufs/ufshpb.c
View File

@ -196,7 +196,8 @@ next_srgn:
}
spin_unlock(&rgn->rgn_lock);
if (activate) {
if (activate ||
test_and_clear_bit(RGN_FLAG_UPDATE, &rgn->rgn_flags)) {
spin_lock_irqsave(&hpb->rsp_list_lock, flags);
ufshpb_update_active_info(hpb, rgn_idx, srgn_idx);
spin_unlock_irqrestore(&hpb->rsp_list_lock, flags);
@ -1412,6 +1413,20 @@ out:
queue_work(ufshpb_wq, &hpb->map_work);
}
static void ufshpb_dev_reset_handler(struct ufshpb_lu *hpb)
{
struct victim_select_info *lru_info = &hpb->lru_info;
struct ufshpb_region *rgn;
unsigned long flags;
spin_lock_irqsave(&hpb->rgn_state_lock, flags);
list_for_each_entry(rgn, &lru_info->lh_lru_rgn, list_lru_rgn)
set_bit(RGN_FLAG_UPDATE, &rgn->rgn_flags);
spin_unlock_irqrestore(&hpb->rgn_state_lock, flags);
}
/*
* This function will parse recommended active subregion information in sense
* data field of response UPIU with SAM_STAT_GOOD state.
@ -1486,6 +1501,18 @@ void ufshpb_rsp_upiu(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
case HPB_RSP_DEV_RESET:
dev_warn(&hpb->sdev_ufs_lu->sdev_dev,
"UFS device lost HPB information during PM.\n");
if (hpb->is_hcm) {
struct scsi_device *sdev;
__shost_for_each_device(sdev, hba->host) {
struct ufshpb_lu *h = sdev->hostdata;
if (h)
ufshpb_dev_reset_handler(h);
}
}
break;
default:
dev_notice(&hpb->sdev_ufs_lu->sdev_dev,
@ -1811,6 +1838,8 @@ static int ufshpb_alloc_region_tbl(struct ufs_hba *hba, struct ufshpb_lu *hpb)
} else {
rgn->rgn_state = HPB_RGN_INACTIVE;
}
rgn->rgn_flags = 0;
}
return 0;
@ -2138,6 +2167,7 @@ static void ufshpb_cancel_jobs(struct ufshpb_lu *hpb)
{
if (hpb->is_hcm)
cancel_work_sync(&hpb->ufshpb_normalization_work);
cancel_work_sync(&hpb->map_work);
}

1
drivers/scsi/ufs/ufshpb.h
View File

@ -127,6 +127,7 @@ struct ufshpb_region {
struct list_head list_lru_rgn;
unsigned long rgn_flags;
#define RGN_FLAG_DIRTY 0
#define RGN_FLAG_UPDATE 1
/* region reads - for host mode */
spinlock_t rgn_lock;