From: Avri Altman <avri.altman@wdc.com>
To: "James E . J . Bottomley" <jejb@linux.vnet.ibm.com>,
"Martin K . Petersen" <martin.petersen@oracle.com>,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: gregkh@linuxfoundation.org, Bart Van Assche <bvanassche@acm.org>,
yongmyung lee <ymhungry.lee@samsung.com>,
Daejun Park <daejun7.park@samsung.com>,
alim.akhtar@samsung.com, asutoshd@codeaurora.org,
Zang Leigang <zangleigang@hisilicon.com>,
Avi Shchislowski <avi.shchislowski@wdc.com>,
Bean Huo <beanhuo@micron.com>,
cang@codeaurora.org, stanley.chu@mediatek.com,
Avri Altman <avri.altman@wdc.com>
Subject: [PATCH v12 07/12] scsi: ufshpb: Add hpb dev reset response
Date: Mon, 12 Jul 2021 12:50:34 +0300 [thread overview]
Message-ID: <20210712095039.8093-8-avri.altman@wdc.com> (raw)
In-Reply-To: <20210712095039.8093-1-avri.altman@wdc.com>
The spec does not define what is the host's recommended response when
the device send hpb dev reset response (oper 0x2).
We will update all active hpb regions: mark them and do that on the next
read.
Signed-off-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Daejun Park <daejun7.park@samsung.com>
---
drivers/scsi/ufs/ufshpb.c | 32 +++++++++++++++++++++++++++++++-
drivers/scsi/ufs/ufshpb.h | 1 +
2 files changed, 32 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/ufs/ufshpb.c b/drivers/scsi/ufs/ufshpb.c
index 7b48a9ab1534..5b473f1800ca 100644
--- a/drivers/scsi/ufs/ufshpb.c
+++ b/drivers/scsi/ufs/ufshpb.c
@@ -196,7 +196,8 @@ static void ufshpb_iterate_rgn(struct ufshpb_lu *hpb, int rgn_idx, int srgn_idx,
}
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 @@ static void ufshpb_rsp_req_region_update(struct ufshpb_lu *hpb,
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);
}
diff --git a/drivers/scsi/ufs/ufshpb.h b/drivers/scsi/ufs/ufshpb.h
index 0204e4fec6bc..43a95c670763 100644
--- a/drivers/scsi/ufs/ufshpb.h
+++ b/drivers/scsi/ufs/ufshpb.h
@@ -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;
--
2.25.1
next prev parent reply other threads:[~2021-07-12 9:52 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-12 9:50 [PATCH v12 00/12] Add Host control mode to HPB Avri Altman
2021-07-12 9:50 ` [PATCH v12 01/12] scsi: ufshpb: Cache HPB Control mode on init Avri Altman
2021-07-12 9:50 ` [PATCH v12 02/12] scsi: ufshpb: Add host control mode support to rsp_upiu Avri Altman
2021-07-12 9:50 ` [PATCH v12 03/12] scsi: ufshpb: Transform set_dirty to iterate_rgn Avri Altman
2021-07-12 9:50 ` [PATCH v12 04/12] scsi: ufshpb: Add reads counter Avri Altman
2021-07-12 9:50 ` [PATCH v12 05/12] scsi: ufshpb: Make eviction depends on region's reads Avri Altman
2021-07-12 9:50 ` [PATCH v12 06/12] scsi: ufshpb: Region inactivation in host mode Avri Altman
2021-07-12 9:50 ` Avri Altman [this message]
2021-07-12 9:50 ` [PATCH v12 08/12] scsi: ufshpb: Add "Cold" regions timer Avri Altman
2021-07-12 9:50 ` [PATCH v12 09/12] scsi: ufshpb: Limit the number of inflight map requests Avri Altman
2021-07-12 9:50 ` [PATCH v12 10/12] scsi: ufshpb: Do not send umap_all in host control mode Avri Altman
2021-07-12 9:50 ` [PATCH v12 11/12] scsi: ufshpb: Add support for " Avri Altman
2021-07-12 9:50 ` [PATCH v12 12/12] scsi: ufshpb: Make host mode parameters configurable Avri Altman
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