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Message-Id: <20210712095039.8093-7-avri.altman@wdc.com>
Date: Mon, 12 Jul 2021 12:50:33 +0300
From: Avri Altman <avri.altman@....com>
To: "James E . J . Bottomley" <jejb@...ux.vnet.ibm.com>,
"Martin K . Petersen" <martin.petersen@...cle.com>,
linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: gregkh@...uxfoundation.org, Bart Van Assche <bvanassche@....org>,
yongmyung lee <ymhungry.lee@...sung.com>,
Daejun Park <daejun7.park@...sung.com>,
alim.akhtar@...sung.com, asutoshd@...eaurora.org,
Zang Leigang <zangleigang@...ilicon.com>,
Avi Shchislowski <avi.shchislowski@....com>,
Bean Huo <beanhuo@...ron.com>, cang@...eaurora.org,
stanley.chu@...iatek.com, Avri Altman <avri.altman@....com>
Subject: [PATCH v12 06/12] scsi: ufshpb: Region inactivation in host mode
In host mode, the host is expected to send HPB-WRITE-BUFFER with
buffer-id = 0x1 when it inactivates a region.
Use the map-requests pool as there is no point in assigning a
designated cache for umap-requests.
Signed-off-by: Avri Altman <avri.altman@....com>
Reviewed-by: Daejun Park <daejun7.park@...sung.com>
---
drivers/scsi/ufs/ufshpb.c | 47 +++++++++++++++++++++++++++++++++------
drivers/scsi/ufs/ufshpb.h | 1 +
2 files changed, 41 insertions(+), 7 deletions(-)
diff --git a/drivers/scsi/ufs/ufshpb.c b/drivers/scsi/ufs/ufshpb.c
index 1eadfc12b6a7..7b48a9ab1534 100644
--- a/drivers/scsi/ufs/ufshpb.c
+++ b/drivers/scsi/ufs/ufshpb.c
@@ -692,7 +692,8 @@ int ufshpb_prep(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
}
static struct ufshpb_req *ufshpb_get_req(struct ufshpb_lu *hpb,
- int rgn_idx, enum req_opf dir)
+ int rgn_idx, enum req_opf dir,
+ bool atomic)
{
struct ufshpb_req *rq;
struct request *req;
@@ -706,7 +707,7 @@ static struct ufshpb_req *ufshpb_get_req(struct ufshpb_lu *hpb,
req = blk_get_request(hpb->sdev_ufs_lu->request_queue, dir,
BLK_MQ_REQ_NOWAIT);
- if ((PTR_ERR(req) == -EWOULDBLOCK) && (--retries > 0)) {
+ if (!atomic && (PTR_ERR(req) == -EWOULDBLOCK) && (--retries > 0)) {
usleep_range(3000, 3100);
goto retry;
}
@@ -737,7 +738,7 @@ static struct ufshpb_req *ufshpb_get_map_req(struct ufshpb_lu *hpb,
struct ufshpb_req *map_req;
struct bio *bio;
- map_req = ufshpb_get_req(hpb, srgn->rgn_idx, REQ_OP_SCSI_IN);
+ map_req = ufshpb_get_req(hpb, srgn->rgn_idx, REQ_OP_SCSI_IN, false);
if (!map_req)
return NULL;
@@ -914,6 +915,8 @@ static void ufshpb_execute_umap_req(struct ufshpb_lu *hpb,
rq->cmd_len = HPB_WRITE_BUFFER_CMD_LENGTH;
blk_execute_rq_nowait(NULL, req, 1, ufshpb_umap_req_compl_fn);
+
+ hpb->stats.umap_req_cnt++;
}
static int ufshpb_execute_map_req(struct ufshpb_lu *hpb,
@@ -1090,12 +1093,13 @@ static void ufshpb_purge_active_subregion(struct ufshpb_lu *hpb,
}
static int ufshpb_issue_umap_req(struct ufshpb_lu *hpb,
- struct ufshpb_region *rgn)
+ struct ufshpb_region *rgn,
+ bool atomic)
{
struct ufshpb_req *umap_req;
int rgn_idx = rgn ? rgn->rgn_idx : 0;
- umap_req = ufshpb_get_req(hpb, rgn_idx, REQ_OP_SCSI_OUT);
+ umap_req = ufshpb_get_req(hpb, rgn_idx, REQ_OP_SCSI_OUT, atomic);
if (!umap_req)
return -ENOMEM;
@@ -1104,13 +1108,19 @@ static int ufshpb_issue_umap_req(struct ufshpb_lu *hpb,
return 0;
}
+static int ufshpb_issue_umap_single_req(struct ufshpb_lu *hpb,
+ struct ufshpb_region *rgn)
+{
+ return ufshpb_issue_umap_req(hpb, rgn, true);
+}
+
static int ufshpb_issue_umap_all_req(struct ufshpb_lu *hpb)
{
- return ufshpb_issue_umap_req(hpb, NULL);
+ return ufshpb_issue_umap_req(hpb, NULL, false);
}
static void __ufshpb_evict_region(struct ufshpb_lu *hpb,
- struct ufshpb_region *rgn)
+ struct ufshpb_region *rgn)
{
struct victim_select_info *lru_info;
struct ufshpb_subregion *srgn;
@@ -1145,6 +1155,14 @@ static int ufshpb_evict_region(struct ufshpb_lu *hpb, struct ufshpb_region *rgn)
goto out;
}
+ if (hpb->is_hcm) {
+ spin_unlock_irqrestore(&hpb->rgn_state_lock, flags);
+ ret = ufshpb_issue_umap_single_req(hpb, rgn);
+ spin_lock_irqsave(&hpb->rgn_state_lock, flags);
+ if (ret)
+ goto out;
+ }
+
__ufshpb_evict_region(hpb, rgn);
}
out:
@@ -1279,6 +1297,18 @@ static int ufshpb_add_region(struct ufshpb_lu *hpb, struct ufshpb_region *rgn)
"LRU full (%d), choose victim %d\n",
atomic_read(&lru_info->active_cnt),
victim_rgn->rgn_idx);
+
+ if (hpb->is_hcm) {
+ spin_unlock_irqrestore(&hpb->rgn_state_lock,
+ flags);
+ ret = ufshpb_issue_umap_single_req(hpb,
+ victim_rgn);
+ spin_lock_irqsave(&hpb->rgn_state_lock,
+ flags);
+ if (ret)
+ goto out;
+ }
+
__ufshpb_evict_region(hpb, victim_rgn);
}
@@ -1848,6 +1878,7 @@ ufshpb_sysfs_attr_show_func(rb_noti_cnt);
ufshpb_sysfs_attr_show_func(rb_active_cnt);
ufshpb_sysfs_attr_show_func(rb_inactive_cnt);
ufshpb_sysfs_attr_show_func(map_req_cnt);
+ufshpb_sysfs_attr_show_func(umap_req_cnt);
static struct attribute *hpb_dev_stat_attrs[] = {
&dev_attr_hit_cnt.attr,
@@ -1856,6 +1887,7 @@ static struct attribute *hpb_dev_stat_attrs[] = {
&dev_attr_rb_active_cnt.attr,
&dev_attr_rb_inactive_cnt.attr,
&dev_attr_map_req_cnt.attr,
+ &dev_attr_umap_req_cnt.attr,
NULL,
};
@@ -1981,6 +2013,7 @@ static void ufshpb_stat_init(struct ufshpb_lu *hpb)
hpb->stats.rb_active_cnt = 0;
hpb->stats.rb_inactive_cnt = 0;
hpb->stats.map_req_cnt = 0;
+ hpb->stats.umap_req_cnt = 0;
}
static void ufshpb_param_init(struct ufshpb_lu *hpb)
diff --git a/drivers/scsi/ufs/ufshpb.h b/drivers/scsi/ufs/ufshpb.h
index 33d163e76d41..0204e4fec6bc 100644
--- a/drivers/scsi/ufs/ufshpb.h
+++ b/drivers/scsi/ufs/ufshpb.h
@@ -191,6 +191,7 @@ struct ufshpb_stats {
u64 rb_inactive_cnt;
u64 map_req_cnt;
u64 pre_req_cnt;
+ u64 umap_req_cnt;
};
struct ufshpb_lu {
--
2.25.1
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