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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 v11 06/12] scsi: ufshpb: Region inactivation in host mode
Date: Wed, 16 Jun 2021 14:27:54 +0300	[thread overview]
Message-ID: <20210616112800.52963-7-avri.altman@wdc.com> (raw)
In-Reply-To: <20210616112800.52963-1-avri.altman@wdc.com>

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@wdc.com>
Reviewed-by: Daejun Park <daejun7.park@samsung.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 b61558196290..d6a4b816814c 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


  parent reply	other threads:[~2021-06-16 11:29 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-16 11:27 [PATCH v11 00/12] Add Host control mode to HPB Avri Altman
2021-06-16 11:27 ` [PATCH v11 01/12] scsi: ufshpb: Cache HPB Control mode on init Avri Altman
2021-06-16 11:27 ` [PATCH v11 02/12] scsi: ufshpb: Add host control mode support to rsp_upiu Avri Altman
2021-06-16 11:27 ` [PATCH v11 03/12] scsi: ufshpb: Transform set_dirty to iterate_rgn Avri Altman
2021-06-16 11:27 ` [PATCH v11 04/12] scsi: ufshpb: Add reads counter Avri Altman
2021-06-16 11:27 ` [PATCH v11 05/12] scsi: ufshpb: Make eviction depends on region's reads Avri Altman
2021-06-16 11:27 ` Avri Altman [this message]
2021-06-16 11:27 ` [PATCH v11 07/12] scsi: ufshpb: Add hpb dev reset response Avri Altman
2021-06-16 11:27 ` [PATCH v11 08/12] scsi: ufshpb: Add "Cold" regions timer Avri Altman
2021-06-16 11:27 ` [PATCH v11 09/12] scsi: ufshpb: Limit the number of inflight map requests Avri Altman
2021-06-16 11:27 ` [PATCH v11 10/12] scsi: ufshpb: Do not send umap_all in host control mode Avri Altman
2021-06-16 11:27 ` [PATCH v11 11/12] scsi: ufshpb: Add support for " Avri Altman
2021-06-16 11:28 ` [PATCH v11 12/12] scsi: ufshpb: Make host mode parameters configurable Avri Altman
     [not found] ` <CGME20210616113004epcas2p41cf111449e118965ae71aaaee1d3bd5c@epcms2p8>
2021-06-21  5:12   ` Daejun Park
2021-06-21  6:43     ` Avri Altman
     [not found]     ` <CGME20210616113004epcas2p41cf111449e118965ae71aaaee1d3bd5c@epcms2p4>
2021-06-21  7:25       ` Daejun Park
     [not found] ` <CGME20210616112925epcas2p1267d33aee5fa552333a0503207e262f2@epcms2p1>
2021-06-21  5:17   ` [PATCH v11 08/12] scsi: ufshpb: Add "Cold" regions timer Daejun Park
2021-06-21  7:03     ` Avri Altman
     [not found]     ` <CGME20210616112925epcas2p1267d33aee5fa552333a0503207e262f2@epcms2p8>
2021-06-21  7:33       ` Daejun Park

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