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Commit c91e585c authored by Bean Huo's avatar Bean Huo Committed by Martin K. Petersen
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scsi: ufs: core: Add advanced RPMB support where UFSHCI 4.0 does not support EHS length in UTRD


According to UFSHCI 4.0 specification:

5.2 Host Controller Capabilities Registers
5.2.1 Offset 00h: CAP – Controller Capabilities:

 "EHS Length in UTRD Supported (EHSLUTRDS): Indicates whether the host
  controller supports EHS Length field in UTRD.

  0 – Host controller takes EHS length from CMD UPIU, and SW driver use EHS
  Length field in CMD UPIU.

  1 – HW controller takes EHS length from UTRD, and SW driver use EHS
  Length field in UTRD.

  NOTE Recommend Host controllers move to taking EHS length from UTRD, and
  in UFS-5, it will be mandatory."

So, when UFSHCI 4.0 doesn't support EHS Length field in UTRD, we could use
EHS Length field in CMD UPIU. Remove the limitation that advanced RPMB only
works when EHS length is supported in UTRD.

Fixes: 6ff265fc ("scsi: ufs: core: bsg: Add advanced RPMB support in ufs_bsg")
Co-developed-by: default avatar"jonghwi.rha" <jonghwi.rha@samsung.com>
Signed-off-by: default avatar"jonghwi.rha" <jonghwi.rha@samsung.com>
Signed-off-by: default avatarBean Huo <beanhuo@micron.com>
Link: https://lore.kernel.org/r/20230809181847.102123-2-beanhuo@iokpp.de


Reviewed-by: default avatarBart Van Assche <bvanassche@acm.org>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 08540650
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