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.alt...@wdc.com>
---
drivers/scsi/ufs/ufshpb.c | 120 ++++++++++++++++++++++++++++++++------
drivers/scsi/ufs/ufshpb.h | 5 +-
2 files changed, 105 insertions(+), 20 deletions(-)
diff --git a/drivers/scsi/ufs/ufshpb.c b/drivers/scsi/ufs/ufshpb.c
index 9cb17c97cf93..3435a5507853 100644
--- a/drivers/scsi/ufs/ufshpb.c
+++ b/drivers/scsi/ufs/ufshpb.c
@@ -717,16 +717,15 @@ int ufshpb_prep(struct ufs_hba *hba, struct ufshcd_lrb
*lrbp)
return 0;
}
-static struct ufshpb_req *ufshpb_get_map_req(struct ufshpb_lu *hpb,
- struct ufshpb_subregion *srgn)
+static struct ufshpb_req *ufshpb_get_req(struct ufshpb_lu *hpb,
+ int rgn_idx, enum req_opf dir)
{
- struct ufshpb_req *map_req;
+ struct ufshpb_req *rq;
struct request *req;
- struct bio *bio;
int retries = HPB_MAP_REQ_RETRIES;
- map_req = kmem_cache_alloc(hpb->map_req_cache, GFP_KERNEL);
- if (!map_req)
+ rq = kmem_cache_alloc(hpb->map_req_cache, GFP_KERNEL);
+ if (!rq)
return NULL;
retry:
@@ -738,36 +737,57 @@ static struct ufshpb_req *ufshpb_get_map_req(struct
ufshpb_lu *hpb,
goto retry;
}
+ req = blk_get_request(hpb->sdev_ufs_lu->request_queue,
+ dir, 0);
if (IS_ERR(req))
- goto free_map_req;
+ goto free_rq;
+
+ rq->hpb = hpb;
+ rq->req = req;
+ rq->rb.rgn_idx = rgn_idx;
+
+ return rq;
+
+free_rq:
+ kmem_cache_free(hpb->map_req_cache, rq);
+ return NULL;
+}
+
+static void ufshpb_put_req(struct ufshpb_lu *hpb, struct ufshpb_req *rq)
+{
+ blk_put_request(rq->req);
+ kmem_cache_free(hpb->map_req_cache, rq);
+}
+
+static struct ufshpb_req *ufshpb_get_map_req(struct ufshpb_lu *hpb,
+ struct ufshpb_subregion *srgn)
+{
+ struct ufshpb_req *map_req;
+ struct bio *bio;
+
+ map_req = ufshpb_get_req(hpb, srgn->rgn_idx, REQ_OP_SCSI_IN);
+ if (!map_req)
+ return NULL;
bio = bio_alloc(GFP_KERNEL, hpb->pages_per_srgn);
if (!bio) {
- blk_put_request(req);
- goto free_map_req;
+ ufshpb_put_req(hpb, map_req);
+ return NULL;
}
- map_req->hpb = hpb;
- map_req->req = req;
map_req->bio = bio;
- map_req->rb.rgn_idx = srgn->rgn_idx;
map_req->rb.srgn_idx = srgn->srgn_idx;
map_req->rb.mctx = srgn->mctx;
return map_req;
-
-free_map_req:
- kmem_cache_free(hpb->map_req_cache, map_req);
- return NULL;
}
static void ufshpb_put_map_req(struct ufshpb_lu *hpb,
- struct ufshpb_req *map_req)
+ struct ufshpb_req *map_req)
{
bio_put(map_req->bio);
- blk_put_request(map_req->req);
- kmem_cache_free(hpb->map_req_cache, map_req);
+ ufshpb_put_req(hpb, map_req);
}
static int ufshpb_clear_dirty_bitmap(struct ufshpb_lu *hpb,
@@ -829,6 +849,13 @@ static void ufshpb_activate_subregion(struct ufshpb_lu
*hpb,
srgn->srgn_state = HPB_SRGN_VALID;
}
+static void ufshpb_umap_req_compl_fn(struct request *req, blk_status_t error)
+{
+ struct ufshpb_req *umap_req = (struct ufshpb_req *)req->end_io_data;
+
+ ufshpb_put_req(umap_req->hpb, umap_req);
+}
+
static void ufshpb_map_req_compl_fn(struct request *req, blk_status_t error)
{
struct ufshpb_req *map_req = (struct ufshpb_req *) req->end_io_data;
@@ -847,6 +874,14 @@ static void ufshpb_map_req_compl_fn(struct request *req,
blk_status_t error)
ufshpb_put_map_req(map_req->hpb, map_req);
}
+static void ufshpb_set_unmap_cmd(unsigned char *cdb, int rgn_idx)
+{
+ cdb[0] = UFSHPB_WRITE_BUFFER;
+ cdb[1] = UFSHPB_WRITE_BUFFER_ID;
+ put_unaligned_be16(rgn_idx, &cdb[2]);
+ cdb[9] = 0x00;
+}
+
static void ufshpb_set_read_buf_cmd(unsigned char *cdb, int rgn_idx,
int srgn_idx, int srgn_mem_size)
{
@@ -860,6 +895,27 @@ static void ufshpb_set_read_buf_cmd(unsigned char *cdb,
int rgn_idx,
cdb[9] = 0x00;
}
+static int ufshpb_execute_umap_req(struct ufshpb_lu *hpb,
+ struct ufshpb_req *umap_req)
+{
+ struct request_queue *q;
+ struct request *req;
+ struct scsi_request *rq;
+
+ q = hpb->sdev_ufs_lu->request_queue;
+ req = umap_req->req;
+ req->timeout = 0;
+ req->end_io_data = (void *)umap_req;
+ rq = scsi_req(req);
+ ufshpb_set_unmap_cmd(rq->cmd, umap_req->rb.rgn_idx);
+ rq->cmd_len = HPB_WRITE_BUFFER_CMD_LENGTH;
+
+ blk_execute_rq_nowait(q, NULL, req, 1, ufshpb_umap_req_compl_fn);
+
+ hpb->stats.umap_req_cnt++;
+ return 0;
+}
+
static int ufshpb_execute_map_req(struct ufshpb_lu *hpb,
struct ufshpb_req *map_req, bool last)
{
@@ -1028,6 +1084,25 @@ 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_req *umap_req;
+
+ umap_req = ufshpb_get_req(hpb, rgn->rgn_idx, REQ_OP_SCSI_OUT);
+ if (!umap_req)
+ return -ENOMEM;
+
+ if (ufshpb_execute_umap_req(hpb, umap_req))
+ goto free_umap_req;
+
+ return 0;
+
+free_umap_req:
+ ufshpb_put_req(hpb, umap_req);
+ return -EAGAIN;
+}
+
static void __ufshpb_evict_region(struct ufshpb_lu *hpb,
struct ufshpb_region *rgn)
{
@@ -1035,6 +1110,10 @@ static void __ufshpb_evict_region(struct ufshpb_lu *hpb,
struct ufshpb_subregion *srgn;
int srgn_idx;
+
+ if (hpb->is_hcm && ufshpb_issue_umap_req(hpb, rgn))
+ return;
+
lru_info = &hpb->lru_info;
dev_dbg(&hpb->sdev_ufs_lu->sdev_dev, "evict region %d\n", rgn->rgn_idx);
@@ -1759,6 +1838,7 @@ 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,
@@ -1767,6 +1847,7 @@ 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,
};
@@ -1881,6 +1962,7 @@ 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 0a41df919f06..13ec49ba260d 100644
--- a/drivers/scsi/ufs/ufshpb.h
+++ b/drivers/scsi/ufs/ufshpb.h
@@ -36,11 +36,13 @@
/* hpb vender defined opcode */
#define UFSHPB_READ 0xF8
#define UFSHPB_READ_BUFFER 0xF9
-#define UFSHPB_READ_BUFFER_ID 0x01
#define UFSHPB_WRITE_BUFFER 0xFA
+#define UFSHPB_READ_BUFFER_ID 0x01
+#define UFSHPB_WRITE_BUFFER_ID 0x01
#define UFSHPB_WRITE_BUFFER_PREFETCH_ID 0x02
#define MAX_HPB_READ_ID 0x7F
#define HPB_READ_BUFFER_CMD_LENGTH 10
+#define HPB_WRITE_BUFFER_CMD_LENGTH 10
#define LU_ENABLED_HPB_FUNC 0x02
#define HPB_RESET_REQ_RETRIES 10
@@ -182,6 +184,7 @@ 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
