[PATCH v4 3/4] scsi: ufs: Fix index of attributes query for WriteBooster feature

[Stanley Chu <stanley.chu@xxxxxxxxxxxx>]

For WriteBooster feature related attributes, the index used by
query shall be LUN ID if LU Dedicated buffer mode is enabled.

Signed-off-by: Stanley Chu <stanley.chu@xxxxxxxxxxxx>
Reviewed-by: Avri Altman <avri.altman@xxxxxxx>
---
 drivers/scsi/ufs/ufs-sysfs.c | 13 +++++++++++--
 drivers/scsi/ufs/ufshcd.c    | 16 ++++++++++------
 drivers/scsi/ufs/ufshcd.h    |  2 +-
 3 files changed, 22 insertions(+), 9 deletions(-)

diff --git a/drivers/scsi/ufs/ufs-sysfs.c b/drivers/scsi/ufs/ufs-sysfs.c
index a0b3763e1dc2..2d71d232a69d 100644
--- a/drivers/scsi/ufs/ufs-sysfs.c
+++ b/drivers/scsi/ufs/ufs-sysfs.c
@@ -637,7 +637,7 @@ static ssize_t _name##_show(struct device *dev,				\
 	int ret;							\
 	struct ufs_hba *hba = dev_get_drvdata(dev);			\
 	if (ufshcd_is_wb_flags(QUERY_FLAG_IDN##_uname))			\
-		index = ufshcd_wb_get_flag_index(hba);			\
+		index = ufshcd_wb_get_query_index(hba);			\
 	pm_runtime_get_sync(hba->dev);					\
 	ret = ufshcd_query_flag(hba, UPIU_QUERY_OPCODE_READ_FLAG,	\
 		QUERY_FLAG_IDN##_uname, index, &flag);			\
@@ -680,6 +680,12 @@ static const struct attribute_group ufs_sysfs_flags_group = {
 	.attrs = ufs_sysfs_device_flags,
 };
 
+static inline bool ufshcd_is_wb_attrs(enum attr_idn idn)
+{
+	return ((idn >= QUERY_ATTR_IDN_WB_FLUSH_STATUS) &&
+		(idn <= QUERY_ATTR_IDN_CURR_WB_BUFF_SIZE));
+}
+
 #define UFS_ATTRIBUTE(_name, _uname)					\
 static ssize_t _name##_show(struct device *dev,				\
 	struct device_attribute *attr, char *buf)			\
@@ -687,9 +693,12 @@ static ssize_t _name##_show(struct device *dev,				\
 	struct ufs_hba *hba = dev_get_drvdata(dev);			\
 	u32 value;							\
 	int ret;							\
+	u8 index = 0;							\
+	if (ufshcd_is_wb_attrs(QUERY_ATTR_IDN##_uname))			\
+		index = ufshcd_wb_get_query_index(hba);			\
 	pm_runtime_get_sync(hba->dev);					\
 	ret = ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_READ_ATTR,	\
-		QUERY_ATTR_IDN##_uname, 0, 0, &value);			\
+		QUERY_ATTR_IDN##_uname, index, 0, &value);		\
 	pm_runtime_put_sync(hba->dev);					\
 	if (ret)							\
 		return -EINVAL;						\
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 0dbd8a7a6642..3262ac0e39d4 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -5199,7 +5199,7 @@ static int ufshcd_wb_ctrl(struct ufs_hba *hba, bool enable)
 	else
 		opcode = UPIU_QUERY_OPCODE_CLEAR_FLAG;
 
-	index = ufshcd_wb_get_flag_index(hba);
+	index = ufshcd_wb_get_query_index(hba);
 	ret = ufshcd_query_flag_retry(hba, opcode,
 				      QUERY_FLAG_IDN_WB_EN, index, NULL);
 	if (ret) {
@@ -5225,7 +5225,7 @@ static int ufshcd_wb_toggle_flush_during_h8(struct ufs_hba *hba, bool set)
 	else
 		val = UPIU_QUERY_OPCODE_CLEAR_FLAG;
 
-	index = ufshcd_wb_get_flag_index(hba);
+	index = ufshcd_wb_get_query_index(hba);
 	return ufshcd_query_flag_retry(hba, val,
 				QUERY_FLAG_IDN_WB_BUFF_FLUSH_DURING_HIBERN8,
 				index, NULL);
@@ -5248,7 +5248,7 @@ static int ufshcd_wb_buf_flush_enable(struct ufs_hba *hba)
 	if (!ufshcd_is_wb_allowed(hba) || hba->wb_buf_flush_enabled)
 		return 0;
 
-	index = ufshcd_wb_get_flag_index(hba);
+	index = ufshcd_wb_get_query_index(hba);
 	ret = ufshcd_query_flag_retry(hba, UPIU_QUERY_OPCODE_SET_FLAG,
 				      QUERY_FLAG_IDN_WB_BUFF_FLUSH_EN,
 				      index, NULL);
@@ -5270,7 +5270,7 @@ static int ufshcd_wb_buf_flush_disable(struct ufs_hba *hba)
 	if (!ufshcd_is_wb_allowed(hba) || !hba->wb_buf_flush_enabled)
 		return 0;
 
-	index = ufshcd_wb_get_flag_index(hba);
+	index = ufshcd_wb_get_query_index(hba);
 	ret = ufshcd_query_flag_retry(hba, UPIU_QUERY_OPCODE_CLEAR_FLAG,
 				      QUERY_FLAG_IDN_WB_BUFF_FLUSH_EN,
 				      index, NULL);
@@ -5290,10 +5290,12 @@ static bool ufshcd_wb_presrv_usrspc_keep_vcc_on(struct ufs_hba *hba,
 {
 	u32 cur_buf;
 	int ret;
+	u8 index;
 
+	index = ufshcd_wb_get_query_index(hba);
 	ret = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_READ_ATTR,
 					      QUERY_ATTR_IDN_CURR_WB_BUFF_SIZE,
-					      0, 0, &cur_buf);
+					      index, 0, &cur_buf);
 	if (ret) {
 		dev_err(hba->dev, "%s dCurWriteBoosterBufferSize read failed %d\n",
 			__func__, ret);
@@ -5316,6 +5318,7 @@ static bool ufshcd_wb_keep_vcc_on(struct ufs_hba *hba)
 {
 	int ret;
 	u32 avail_buf;
+	u8 index;
 
 	if (!ufshcd_is_wb_allowed(hba))
 		return false;
@@ -5330,9 +5333,10 @@ static bool ufshcd_wb_keep_vcc_on(struct ufs_hba *hba)
 	 * buffer (dCurrentWriteBoosterBufferSize). There's no point in
 	 * keeping vcc on when current buffer is empty.
 	 */
+	index = ufshcd_wb_get_query_index(hba);
 	ret = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_READ_ATTR,
 				      QUERY_ATTR_IDN_AVAIL_WB_BUFF_SIZE,
-				      0, 0, &avail_buf);
+				      index, 0, &avail_buf);
 	if (ret) {
 		dev_warn(hba->dev, "%s dAvailableWriteBoosterBufferSize read failed %d\n",
 			 __func__, ret);
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 88d420242782..9acaeaf94d29 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -868,7 +868,7 @@ static inline bool ufshcd_keep_autobkops_enabled_except_suspend(
 	return hba->caps & UFSHCD_CAP_KEEP_AUTO_BKOPS_ENABLED_EXCEPT_SUSPEND;
 }
 
-static inline u8 ufshcd_wb_get_flag_index(struct ufs_hba *hba)
+static inline u8 ufshcd_wb_get_query_index(struct ufs_hba *hba)
 {
 	if (hba->dev_info.b_wb_buffer_type == WB_BUF_MODE_LU_DEDICATED)
 		return hba->dev_info.wb_dedicated_lu;
-- 
2.18.0