scsi: ufs: ufshpb: Change sysfs node hpb_stats/rb_* prefix to start with rcmd_*

According to the documentation of the sysfs nodes rb_noti_cnt,
rb_active_cnt and rb_inactive_cnt, these are all related to HPB
recommendation in UPIU response packet. 'rcmd' (recommendation) should be
the correct abbreviation.

Change the sysfs documentation about these sysfs nodes to highlight what
they mean under different HPB control modes.

Link: https://lore.kernel.org/r/20220505134707.35929-5-huobean@gmail.comReviewed-by: Keoseong Park <keosung.park@samsung.com>
Signed-off-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Documentation/ABI/testing/sysfs-driver-ufs

@@ -1518,7 +1518,7 @@ Description:	This entry shows the number of reads that cannot be changed to
 
 		The file is read only.
 
-What:		/sys/class/scsi_device/*/device/hpb_stats/rb_noti_cnt
+What:		/sys/class/scsi_device/*/device/hpb_stats/rcmd_noti_cnt
 Date:		June 2021
 Contact:	Daejun Park <daejun7.park@samsung.com>
 Description:	This entry shows the number of response UPIUs that has
@@ -1526,19 +1526,23 @@ Description:	This entry shows the number of response UPIUs that has
 
 		The file is read only.
 
-What:		/sys/class/scsi_device/*/device/hpb_stats/rb_active_cnt
+What:		/sys/class/scsi_device/*/device/hpb_stats/rcmd_active_cnt
 Date:		June 2021
 Contact:	Daejun Park <daejun7.park@samsung.com>
-Description:	This entry shows the number of active sub-regions recommended by
-		response UPIUs.
+Description:	For the HPB device control mode, this entry shows the number of
+        active sub-regions recommended by response UPIUs. For the HPB host control
+        mode, this entry shows the number of active sub-regions recommended by the
+        HPB host control mode heuristic algorithm.
 
 		The file is read only.
 
-What:		/sys/class/scsi_device/*/device/hpb_stats/rb_inactive_cnt
+What:		/sys/class/scsi_device/*/device/hpb_stats/rcmd_inactive_cnt
 Date:		June 2021
 Contact:	Daejun Park <daejun7.park@samsung.com>
-Description:	This entry shows the number of inactive regions recommended by
-		response UPIUs.
+Description:	For the HPB device control mode, this entry shows the number of
+        inactive regions recommended by response UPIUs. For the HPB host control
+        mode, this entry shows the number of inactive regions recommended by the
+        HPB host control mode heuristic algorithm.
 
 		The file is read only.
 

drivers/scsi/ufs/ufshpb.c

@@ -563,7 +563,7 @@ static void ufshpb_update_active_info(struct ufshpb_lu *hpb, int rgn_idx,
 	if (list_empty(&srgn->list_act_srgn))
 		list_add_tail(&srgn->list_act_srgn, &hpb->lh_act_srgn);
 
-	hpb->stats.rb_active_cnt++;
+	hpb->stats.rcmd_active_cnt++;
 }
 
 static void ufshpb_update_inactive_info(struct ufshpb_lu *hpb, int rgn_idx)
@@ -580,7 +580,7 @@ static void ufshpb_update_inactive_info(struct ufshpb_lu *hpb, int rgn_idx)
 	if (list_empty(&rgn->list_inact_rgn))
 		list_add_tail(&rgn->list_inact_rgn, &hpb->lh_inact_rgn);
 
-	hpb->stats.rb_inactive_cnt++;
+	hpb->stats.rcmd_inactive_cnt++;
 }
 
 static void ufshpb_activate_subregion(struct ufshpb_lu *hpb,
@@ -1321,7 +1321,7 @@ void ufshpb_rsp_upiu(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
 	if (!ufshpb_is_hpb_rsp_valid(hba, lrbp, rsp_field))
 		return;
 
-	hpb->stats.rb_noti_cnt++;
+	hpb->stats.rcmd_noti_cnt++;
 
 	switch (rsp_field->hpb_op) {
 	case HPB_RSP_REQ_REGION_UPDATE:
@@ -1724,18 +1724,18 @@ static DEVICE_ATTR_RO(__name)
 
 ufshpb_sysfs_attr_show_func(hit_cnt);
 ufshpb_sysfs_attr_show_func(miss_cnt);
-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(rcmd_noti_cnt);
+ufshpb_sysfs_attr_show_func(rcmd_active_cnt);
+ufshpb_sysfs_attr_show_func(rcmd_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,
 	&dev_attr_miss_cnt.attr,
-	&dev_attr_rb_noti_cnt.attr,
-	&dev_attr_rb_active_cnt.attr,
-	&dev_attr_rb_inactive_cnt.attr,
+	&dev_attr_rcmd_noti_cnt.attr,
+	&dev_attr_rcmd_active_cnt.attr,
+	&dev_attr_rcmd_inactive_cnt.attr,
 	&dev_attr_map_req_cnt.attr,
 	&dev_attr_umap_req_cnt.attr,
 	NULL,
@@ -2098,9 +2098,9 @@ static void ufshpb_stat_init(struct ufshpb_lu *hpb)
 {
 	hpb->stats.hit_cnt = 0;
 	hpb->stats.miss_cnt = 0;
-	hpb->stats.rb_noti_cnt = 0;
-	hpb->stats.rb_active_cnt = 0;
-	hpb->stats.rb_inactive_cnt = 0;
+	hpb->stats.rcmd_noti_cnt = 0;
+	hpb->stats.rcmd_active_cnt = 0;
+	hpb->stats.rcmd_inactive_cnt = 0;
 	hpb->stats.map_req_cnt = 0;
 	hpb->stats.umap_req_cnt = 0;
 }

drivers/scsi/ufs/ufshpb.h

@@ -211,9 +211,9 @@ struct ufshpb_params {
 struct ufshpb_stats {
 	u64 hit_cnt;
 	u64 miss_cnt;
-	u64 rb_noti_cnt;
-	u64 rb_active_cnt;
-	u64 rb_inactive_cnt;
+	u64 rcmd_noti_cnt;
+	u64 rcmd_active_cnt;
+	u64 rcmd_inactive_cnt;
 	u64 map_req_cnt;
 	u64 pre_req_cnt;
 	u64 umap_req_cnt;