Retrieve maximum number of RPMB frames that can be
in a single request.
Currently the limitations is provided only for writes
via reliable_wr_cnt API.
V7: New in the series
Signed-off-by: Tomas Winkler <tomas.wink...@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usys...@intel.com>
---
drivers/scsi/ufs/ufs.h | 6 ++++++
drivers/scsi/ufs/ufshcd.c | 22 ++++++++++++++++++++++
2 files changed, 28 insertions(+)
diff --git a/drivers/scsi/ufs/ufs.h b/drivers/scsi/ufs/ufs.h
index 845b874e2977..84bb8d7c6b63 100644
--- a/drivers/scsi/ufs/ufs.h
+++ b/drivers/scsi/ufs/ufs.h
@@ -176,6 +176,12 @@ enum ufs_desc_max_size {
QUERY_DESC_RFU_MAX_SIZE = 0x00,
};
+enum geometry_desc_param_offset {
+ GEOMETRY_DESC_LEN = 0x0,
+ GEOMETRY_DESC_TYPE = 0x1,
+ GEOMETRY_DESC_RPMB_RW_SIZE = 0x17,
+};
+
/* Unit descriptor parameters offsets in bytes*/
enum unit_desc_param {
UNIT_DESC_PARAM_LEN = 0x0,
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 95bb9dc7fbfe..69f5b03f6774 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -2196,6 +2196,15 @@ static inline int ufshcd_read_unit_desc_param(struct
ufs_hba *hba,
param_offset, param_read_buf, param_size);
}
+static inline int ufshcd_read_geometry_desc_param(struct ufs_hba *hba,
+ enum geometry_desc_param_offset param_offset,
+ u8 *param_read_buf, u32 param_size)
+{
+ return ufshcd_read_desc_param(hba, QUERY_DESC_IDN_GEOMETRY, 0,
+ param_offset, param_read_buf, param_size);
+}
+
+
/**
* ufshcd_memory_alloc - allocate memory for host memory space data structures
* @hba: per adapter instance
@@ -4896,6 +4905,19 @@ static struct rpmb_ops ufshcd_rpmb_dev_ops = {
static inline void ufshcd_rpmb_add(struct ufs_hba *hba)
{
struct rpmb_dev *rdev;
+ u8 rw_size;
+ int ret;
+
+ ret = ufshcd_read_geometry_desc_param(hba, GEOMETRY_DESC_RPMB_RW_SIZE,
+ &rw_size, sizeof(rw_size));
+ if (ret) {
+ dev_warn(hba->dev, "%s: cannot get rpmb rw limit %d\n",
+ dev_name(hba->dev), ret);
+ /* fallback to singel frame write */
+ rw_size = 1;
+ }
+
+ ufshcd_rpmb_dev_ops.reliable_wr_cnt = rw_size;
scsi_device_get(hba->sdev_ufs_rpmb);
rdev = rpmb_dev_register(hba->dev, &ufshcd_rpmb_dev_ops);
--
2.7.4
--
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