[PATCH v6 2/4] ufs: core: Remove redundant desc_size variable from hba
From: Arthur Simchaev
Date: Wed Dec 14 2022 - 04:51:06 EST
Always read the descriptor with QUERY_DESC_MAX_SIZE.
According to the spec, the device returns the actual size
Reviewed-by: Bart Van Assche <bvanassche@xxxxxxx>
Reviewed-by: Bean Huo <beanhuo@xxxxxxxxxx>
Signed-off-by: Arthur Simchaev <Arthur.Simchaev@xxxxxxx>
---
drivers/ufs/core/ufs_bsg.c | 6 +---
drivers/ufs/core/ufshcd-priv.h | 3 --
drivers/ufs/core/ufshcd.c | 72 ++++++++----------------------------------
drivers/ufs/core/ufshpb.c | 4 +--
include/ufs/ufs.h | 1 -
include/ufs/ufshcd.h | 4 ---
6 files changed, 15 insertions(+), 75 deletions(-)
diff --git a/drivers/ufs/core/ufs_bsg.c b/drivers/ufs/core/ufs_bsg.c
index b99e3f3..7eec38c 100644
--- a/drivers/ufs/core/ufs_bsg.c
+++ b/drivers/ufs/core/ufs_bsg.c
@@ -21,11 +21,7 @@ static int ufs_bsg_get_query_desc_size(struct ufs_hba *hba, int *desc_len,
if (desc_size <= 0)
return -EINVAL;
- ufshcd_map_desc_id_to_length(hba, desc_id, desc_len);
- if (!*desc_len)
- return -EINVAL;
-
- *desc_len = min_t(int, *desc_len, desc_size);
+ *desc_len = min_t(int, QUERY_DESC_MAX_SIZE, desc_size);
return 0;
}
diff --git a/drivers/ufs/core/ufshcd-priv.h b/drivers/ufs/core/ufshcd-priv.h
index a9e8e1f..c52e2f3 100644
--- a/drivers/ufs/core/ufshcd-priv.h
+++ b/drivers/ufs/core/ufshcd-priv.h
@@ -70,9 +70,6 @@ int ufshcd_read_string_desc(struct ufs_hba *hba, u8 desc_index,
int ufshcd_hold(struct ufs_hba *hba, bool async);
void ufshcd_release(struct ufs_hba *hba);
-void ufshcd_map_desc_id_to_length(struct ufs_hba *hba, enum desc_idn desc_id,
- int *desc_length);
-
int ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd);
int ufshcd_exec_raw_upiu_cmd(struct ufs_hba *hba,
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index c43dc2e..97eb5a6 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -3369,37 +3369,6 @@ int ufshcd_query_descriptor_retry(struct ufs_hba *hba,
}
/**
- * ufshcd_map_desc_id_to_length - map descriptor IDN to its length
- * @hba: Pointer to adapter instance
- * @desc_id: descriptor idn value
- * @desc_len: mapped desc length (out)
- */
-void ufshcd_map_desc_id_to_length(struct ufs_hba *hba, enum desc_idn desc_id,
- int *desc_len)
-{
- if (desc_id >= QUERY_DESC_IDN_MAX || desc_id == QUERY_DESC_IDN_RFU_0 ||
- desc_id == QUERY_DESC_IDN_RFU_1)
- *desc_len = 0;
- else
- *desc_len = hba->desc_size[desc_id];
-}
-EXPORT_SYMBOL(ufshcd_map_desc_id_to_length);
-
-static void ufshcd_update_desc_length(struct ufs_hba *hba,
- enum desc_idn desc_id, int desc_index,
- unsigned char desc_len)
-{
- if (hba->desc_size[desc_id] == QUERY_DESC_MAX_SIZE &&
- desc_id != QUERY_DESC_IDN_STRING && desc_index != UFS_RPMB_UNIT)
- /* For UFS 3.1, the normal unit descriptor is 10 bytes larger
- * than the RPMB unit, however, both descriptors share the same
- * desc_idn, to cover both unit descriptors with one length, we
- * choose the normal unit descriptor length by desc_index.
- */
- hba->desc_size[desc_id] = desc_len;
-}
-
-/**
* ufshcd_read_desc_param - read the specified descriptor parameter
* @hba: Pointer to adapter instance
* @desc_id: descriptor idn value
@@ -3419,20 +3388,13 @@ int ufshcd_read_desc_param(struct ufs_hba *hba,
{
int ret;
u8 *desc_buf;
- int buff_len;
+ int buff_len = QUERY_DESC_MAX_SIZE;
bool is_kmalloc = true;
/* Safety check */
if (desc_id >= QUERY_DESC_IDN_MAX || !param_size)
return -EINVAL;
- /* Get the length of descriptor */
- ufshcd_map_desc_id_to_length(hba, desc_id, &buff_len);
- if (!buff_len) {
- dev_err(hba->dev, "%s: Failed to get desc length\n", __func__);
- return -EINVAL;
- }
-
if (param_offset >= buff_len) {
dev_err(hba->dev, "%s: Invalid offset 0x%x in descriptor IDN 0x%x, length 0x%x\n",
__func__, param_offset, desc_id, buff_len);
@@ -3470,7 +3432,6 @@ int ufshcd_read_desc_param(struct ufs_hba *hba,
/* Update descriptor length */
buff_len = desc_buf[QUERY_DESC_LENGTH_OFFSET];
- ufshcd_update_desc_length(hba, desc_id, desc_index, buff_len);
if (is_kmalloc) {
/* Make sure we don't copy more data than available */
@@ -4909,7 +4870,7 @@ static void ufshcd_setup_links(struct ufs_hba *hba, struct scsi_device *sdev)
*/
static void ufshcd_lu_init(struct ufs_hba *hba, struct scsi_device *sdev)
{
- int len = hba->desc_size[QUERY_DESC_IDN_UNIT];
+ int len = QUERY_DESC_MAX_SIZE;
u8 lun = ufshcd_scsi_to_upiu_lun(sdev->lun);
u8 lun_qdepth = hba->nutrs;
u8 *desc_buf;
@@ -7488,25 +7449,24 @@ static u32 ufshcd_find_max_sup_active_icc_level(struct ufs_hba *hba,
static void ufshcd_set_active_icc_lvl(struct ufs_hba *hba)
{
int ret;
- int buff_len = hba->desc_size[QUERY_DESC_IDN_POWER];
u8 *desc_buf;
u32 icc_level;
- desc_buf = kmalloc(buff_len, GFP_KERNEL);
+ desc_buf = kzalloc(QUERY_DESC_MAX_SIZE, GFP_KERNEL);
if (!desc_buf)
return;
ret = ufshcd_read_desc_param(hba, QUERY_DESC_IDN_POWER, 0, 0,
- desc_buf, buff_len);
+ desc_buf, QUERY_DESC_MAX_SIZE);
if (ret) {
dev_err(hba->dev,
- "%s: Failed reading power descriptor.len = %d ret = %d",
- __func__, buff_len, ret);
+ "%s: Failed reading power descriptor ret = %d",
+ __func__, ret);
goto out;
}
icc_level = ufshcd_find_max_sup_active_icc_level(hba, desc_buf,
- buff_len);
+ QUERY_DESC_MAX_SIZE);
dev_dbg(hba->dev, "%s: setting icc_level 0x%x", __func__, icc_level);
ret = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_WRITE_ATTR,
@@ -7723,14 +7683,14 @@ static int ufs_get_device_desc(struct ufs_hba *hba)
u8 *desc_buf;
struct ufs_dev_info *dev_info = &hba->dev_info;
- desc_buf = kmalloc(QUERY_DESC_MAX_SIZE, GFP_KERNEL);
+ desc_buf = kzalloc(QUERY_DESC_MAX_SIZE, GFP_KERNEL);
if (!desc_buf) {
err = -ENOMEM;
goto out;
}
err = ufshcd_read_desc_param(hba, QUERY_DESC_IDN_DEVICE, 0, 0, desc_buf,
- hba->desc_size[QUERY_DESC_IDN_DEVICE]);
+ QUERY_DESC_MAX_SIZE);
if (err) {
dev_err(hba->dev, "%s: Failed reading Device Desc. err = %d\n",
__func__, err);
@@ -7977,18 +7937,16 @@ static void ufshcd_clear_dbg_ufs_stats(struct ufs_hba *hba)
static int ufshcd_device_geo_params_init(struct ufs_hba *hba)
{
int err;
- size_t buff_len;
u8 *desc_buf;
- buff_len = hba->desc_size[QUERY_DESC_IDN_GEOMETRY];
- desc_buf = kmalloc(buff_len, GFP_KERNEL);
+ desc_buf = kzalloc(QUERY_DESC_MAX_SIZE, GFP_KERNEL);
if (!desc_buf) {
err = -ENOMEM;
goto out;
}
err = ufshcd_read_desc_param(hba, QUERY_DESC_IDN_GEOMETRY, 0, 0,
- desc_buf, buff_len);
+ desc_buf, QUERY_DESC_MAX_SIZE);
if (err) {
dev_err(hba->dev, "%s: Failed reading Geometry Desc. err = %d\n",
__func__, err);
@@ -8000,7 +7958,7 @@ static int ufshcd_device_geo_params_init(struct ufs_hba *hba)
else if (desc_buf[GEOMETRY_DESC_PARAM_MAX_NUM_LUN] == 0)
hba->dev_info.max_lu_supported = 8;
- if (hba->desc_size[QUERY_DESC_IDN_GEOMETRY] >=
+ if (desc_buf[QUERY_DESC_LENGTH_OFFSET] >=
GEOMETRY_DESC_PARAM_HPB_MAX_ACTIVE_REGS)
ufshpb_get_geo_info(hba, desc_buf);
@@ -8085,11 +8043,7 @@ static int ufshcd_set_dev_ref_clk(struct ufs_hba *hba)
static int ufshcd_device_params_init(struct ufs_hba *hba)
{
bool flag;
- int ret, i;
-
- /* Init device descriptor sizes */
- for (i = 0; i < QUERY_DESC_IDN_MAX; i++)
- hba->desc_size[i] = QUERY_DESC_MAX_SIZE;
+ int ret;
/* Init UFS geometry descriptor related parameters */
ret = ufshcd_device_geo_params_init(hba);
diff --git a/drivers/ufs/core/ufshpb.c b/drivers/ufs/core/ufshpb.c
index be3fb24..19c9b5d 100644
--- a/drivers/ufs/core/ufshpb.c
+++ b/drivers/ufs/core/ufshpb.c
@@ -2382,12 +2382,10 @@ static int ufshpb_get_lu_info(struct ufs_hba *hba, int lun,
{
u16 max_active_rgns;
u8 lu_enable;
- int size;
+ int size = QUERY_DESC_MAX_SIZE;
int ret;
char desc_buf[QUERY_DESC_MAX_SIZE];
- ufshcd_map_desc_id_to_length(hba, QUERY_DESC_IDN_UNIT, &size);
-
ufshcd_rpm_get_sync(hba);
ret = ufshcd_query_descriptor_retry(hba, UPIU_QUERY_OPCODE_READ_DESC,
QUERY_DESC_IDN_UNIT, lun, 0,
diff --git a/include/ufs/ufs.h b/include/ufs/ufs.h
index 1bba3fe..2fc7107 100644
--- a/include/ufs/ufs.h
+++ b/include/ufs/ufs.h
@@ -38,7 +38,6 @@
#define UFS_UPIU_MAX_UNIT_NUM_ID 0x7F
#define UFS_MAX_LUNS (SCSI_W_LUN_BASE + UFS_UPIU_MAX_UNIT_NUM_ID)
#define UFS_UPIU_WLUN_ID (1 << 7)
-#define UFS_RPMB_UNIT 0xC4
/* WriteBooster buffer is available only for the logical unit from 0 to 7 */
#define UFS_UPIU_MAX_WB_LUN_ID 8
diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h
index 5cf81df..830abab 100644
--- a/include/ufs/ufshcd.h
+++ b/include/ufs/ufshcd.h
@@ -952,7 +952,6 @@ struct ufs_hba {
bool is_urgent_bkops_lvl_checked;
struct rw_semaphore clk_scaling_lock;
- unsigned char desc_size[QUERY_DESC_IDN_MAX];
atomic_t scsi_block_reqs_cnt;
struct device bsg_dev;
@@ -1186,9 +1185,6 @@ void ufshcd_release(struct ufs_hba *hba);
void ufshcd_clkgate_delay_set(struct device *dev, unsigned long value);
-void ufshcd_map_desc_id_to_length(struct ufs_hba *hba, enum desc_idn desc_id,
- int *desc_length);
-
u32 ufshcd_get_local_unipro_ver(struct ufs_hba *hba);
int ufshcd_get_vreg(struct device *dev, struct ufs_vreg *vreg);
--
2.7.4