@@ -330,6 +330,12 @@ enum health_desc_param {
HEALTH_DESC_PARAM_LIFE_TIME_EST_B = 0x4,
};
+/* WriteBooster buffer mode */
+enum {
+ WB_BUF_MODE_LU_DEDICATED = 0x0,
+ WB_BUF_MODE_SHARED = 0x1,
+};
+
/*
* Logical Unit Write Protect
* 00h: LU not write protected
@@ -559,6 +565,7 @@ struct ufs_dev_info {
bool is_lu_power_on_wp;
/* Maximum number of general LU supported by the UFS device */
u8 max_lu_supported;
+ u8 wb_dedicated_lu;
u16 wmanufacturerid;
/*UFS device Product Name */
u8 *model;
@@ -5202,9 +5202,18 @@ static bool ufshcd_wb_sup(struct ufs_hba *hba)
return ufshcd_is_wb_allowed(hba);
}
+static int ufshcd_wb_get_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;
+ else
+ return 0;
+}
+
static int ufshcd_wb_ctrl(struct ufs_hba *hba, bool enable)
{
int ret;
+ u8 index;
enum query_opcode opcode;
if (!ufshcd_wb_sup(hba))
@@ -5217,8 +5226,9 @@ static int ufshcd_wb_ctrl(struct ufs_hba *hba, bool enable)
else
opcode = UPIU_QUERY_OPCODE_CLEAR_FLAG;
+ index = ufshcd_wb_get_index(hba);
ret = ufshcd_query_flag_retry(hba, opcode,
- QUERY_FLAG_IDN_WB_EN, 0, NULL);
+ QUERY_FLAG_IDN_WB_EN, index, NULL);
if (ret) {
dev_err(hba->dev, "%s write booster %s failed %d\n",
__func__, enable ? "enable" : "disable", ret);
@@ -5235,15 +5245,17 @@ static int ufshcd_wb_ctrl(struct ufs_hba *hba, bool enable)
static int ufshcd_wb_toggle_flush_during_h8(struct ufs_hba *hba, bool set)
{
int val;
+ u8 index;
if (set)
val = UPIU_QUERY_OPCODE_SET_FLAG;
else
val = UPIU_QUERY_OPCODE_CLEAR_FLAG;
+ index = ufshcd_wb_get_index(hba);
return ufshcd_query_flag_retry(hba, val,
- QUERY_FLAG_IDN_WB_BUFF_FLUSH_DURING_HIBERN8, 0,
- NULL);
+ QUERY_FLAG_IDN_WB_BUFF_FLUSH_DURING_HIBERN8,
+ index, NULL);
}
static inline void ufshcd_wb_toggle_flush(struct ufs_hba *hba, bool enable)
@@ -5258,13 +5270,15 @@ static inline void ufshcd_wb_toggle_flush(struct ufs_hba *hba, bool enable)
static int ufshcd_wb_buf_flush_enable(struct ufs_hba *hba)
{
int ret;
+ u8 index;
if (!ufshcd_wb_sup(hba) || hba->wb_buf_flush_enabled)
return 0;
+ index = ufshcd_wb_get_index(hba);
ret = ufshcd_query_flag_retry(hba, UPIU_QUERY_OPCODE_SET_FLAG,
QUERY_FLAG_IDN_WB_BUFF_FLUSH_EN,
- 0, NULL);
+ index, NULL);
if (ret)
dev_err(hba->dev, "%s WB - buf flush enable failed %d\n",
__func__, ret);
@@ -5278,12 +5292,15 @@ static int ufshcd_wb_buf_flush_enable(struct ufs_hba *hba)
static int ufshcd_wb_buf_flush_disable(struct ufs_hba *hba)
{
int ret;
+ u8 index;
if (!ufshcd_wb_sup(hba) || !hba->wb_buf_flush_enabled)
return 0;
+ index = ufshcd_wb_get_index(hba);
ret = ufshcd_query_flag_retry(hba, UPIU_QUERY_OPCODE_CLEAR_FLAG,
- QUERY_FLAG_IDN_WB_BUFF_FLUSH_EN, 0, NULL);
+ QUERY_FLAG_IDN_WB_BUFF_FLUSH_EN,
+ index, NULL);
if (ret) {
dev_warn(hba->dev, "%s: WB - buf flush disable failed %d\n",
__func__, ret);
@@ -6802,6 +6819,10 @@ static int ufshcd_scsi_add_wlus(struct ufs_hba *hba)
static void ufshcd_wb_probe(struct ufs_hba *hba, u8 *desc_buf)
{
+ int ret;
+ u8 lun;
+ u32 d_lu_wb_buf_alloc = 0;
+
if (hba->desc_size.dev_desc <= DEVICE_DESC_PARAM_EXT_UFS_FEATURE_SUP)
goto wb_disabled;
@@ -6821,15 +6842,35 @@ static void ufshcd_wb_probe(struct ufs_hba *hba, u8 *desc_buf)
hba->dev_info.b_wb_buffer_type =
desc_buf[DEVICE_DESC_PARAM_WB_TYPE];
- hba->dev_info.d_wb_alloc_units =
- get_unaligned_be32(desc_buf +
- DEVICE_DESC_PARAM_WB_SHARED_ALLOC_UNITS);
hba->dev_info.b_presrv_uspc_en =
desc_buf[DEVICE_DESC_PARAM_WB_PRESRV_USRSPC_EN];
- if (!(hba->dev_info.b_wb_buffer_type &&
- hba->dev_info.d_wb_alloc_units))
- goto wb_disabled;
+ if (hba->dev_info.b_wb_buffer_type == WB_BUF_MODE_SHARED) {
+ hba->dev_info.d_wb_alloc_units =
+ get_unaligned_be32(desc_buf +
+ DEVICE_DESC_PARAM_WB_SHARED_ALLOC_UNITS);
+ if (!hba->dev_info.d_wb_alloc_units)
+ goto wb_disabled;
+ } else {
+ for (lun = 0; lun < hba->dev_info.max_lu_supported; lun++) {
+ ret = ufshcd_read_unit_desc_param(hba,
+ lun,
+ UNIT_DESC_PARAM_WB_BUF_ALLOC_UNITS,
+ (u8 *)&d_lu_wb_buf_alloc,
+ sizeof(d_lu_wb_buf_alloc));
+ if (ret)
+ goto wb_disabled;
+ if (d_lu_wb_buf_alloc) {
+ hba->dev_info.wb_dedicated_lu = lun;
+ break;
+ }
+ }
+
+ if (!d_lu_wb_buf_alloc)
+ goto wb_disabled;
+ }
+
+ return;
wb_disabled:
hba->caps &= ~UFSHCD_CAP_WB_EN;
According to UFS specification, there are two WriteBooster mode of operations: "LU dedicated buffer" mode and "shared buffer" mode. In the "LU dedicated buffer" mode, the WriteBooster Buffer is dedicated to a logical unit. If the device supports the "LU dedicated buffer" mode, this mode is configured by setting bWriteBoosterBufferType to 00h. The logical unit WriteBooster Buffer size is configured by setting the dLUNumWriteBoosterBufferAllocUnits field of the related Unit Descriptor. Only a value greater than zero enables the WriteBooster feature in the logical unit. Modify ufshcd_wb_probe() as above description to support LU Dedicated buffer type. Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> --- drivers/scsi/ufs/ufs.h | 7 +++++ drivers/scsi/ufs/ufshcd.c | 63 ++++++++++++++++++++++++++++++++------- 2 files changed, 59 insertions(+), 11 deletions(-)