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Subject[PATCH v5 05/10] scsi: ufshpb: Region inactivation in host mode
Date
I 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>
---
drivers/scsi/ufs/ufshpb.c | 14 ++++++++++++++
drivers/scsi/ufs/ufshpb.h | 1 +
2 files changed, 15 insertions(+)

diff --git a/drivers/scsi/ufs/ufshpb.c b/drivers/scsi/ufs/ufshpb.c
index 6f4fd22eaf2f..0744feb4d484 100644
--- a/drivers/scsi/ufs/ufshpb.c
+++ b/drivers/scsi/ufs/ufshpb.c
@@ -907,6 +907,7 @@ static int ufshpb_execute_umap_req(struct ufshpb_lu *hpb,

blk_execute_rq_nowait(q, NULL, req, 1, ufshpb_umap_req_compl_fn);

+ hpb->stats.umap_req_cnt++;
return 0;
}

@@ -1103,6 +1104,12 @@ static int ufshpb_issue_umap_req(struct ufshpb_lu *hpb,
return -EAGAIN;
}

+static int ufshpb_issue_umap_single_req(struct ufshpb_lu *hpb,
+ struct ufshpb_region *rgn)
+{
+ return ufshpb_issue_umap_req(hpb, rgn);
+}
+
static int ufshpb_issue_umap_all_req(struct ufshpb_lu *hpb)
{
return ufshpb_issue_umap_req(hpb, NULL);
@@ -1115,6 +1122,10 @@ static void __ufshpb_evict_region(struct ufshpb_lu *hpb,
struct ufshpb_subregion *srgn;
int srgn_idx;

+
+ if (hpb->is_hcm && ufshpb_issue_umap_single_req(hpb, rgn))
+ return;
+
lru_info = &hpb->lru_info;

dev_dbg(&hpb->sdev_ufs_lu->sdev_dev, "evict region %d\n", rgn->rgn_idx);
@@ -1855,6 +1866,7 @@ 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,
@@ -1863,6 +1875,7 @@ 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,
};

@@ -1978,6 +1991,7 @@ 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 bd4308010466..84598a317897 100644
--- a/drivers/scsi/ufs/ufshpb.h
+++ b/drivers/scsi/ufs/ufshpb.h
@@ -186,6 +186,7 @@ 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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