[PATCH v5 0/8] scsi: ufs: support LU Dedicated buffer mode for WriteBooster

Stanley Chu
2020-05-03T11:45:23Z

Hi,
This patchset adds LU dedicated buffer mode support for WriteBooster.
In the meanwhile, enable WriteBooster capability on MediaTek UFS platforms.

v4 -> v5:
- Check LUN ID for available WriteBooster buffer only from 0 to 7 according to spec (Avri Altman)
- Skip checking any possible errors from ufshcd_read_unit_desc_param(hba, lun, UNIT_DESC_PARAM_WB_BUF_ALLOC_UNITS) in ufshcd_wb_probe() and check returned d_lu_wb_buf_alloc (shall be zero if error happens) (Avri Altman)

v3 -> v4:
- Introduce "fixup_dev_quirks" vops to allow vendors to fix and modify device quirks, and provide an initial vendor-specific device quirk table on MediaTek UFS platforms
- Avoid relying on common device quirk table for pre-3.1 UFS device with non-standard WriteBooster support (Can Guo)
- Fix comments for ufshcd_wb_probe() (Can Guo)
- Make ufshcd_wb_get_flag_index() inline and fix ufshcd_is_wb_flags() (Avri Altman)

v2 -> v3:
- Introduce a device quirk to support WriteBooster in pre-3.1 UFS devices (Avri Altman)
- Fix WriteBooster related sysfs nodes. Now all WriteBooster related sysfs nodes are specifically mapped to the LUN with WriteBooster enabled in LU Dedicated buffer mode (Avri Altman)

v1 -> v2:
- Change the definition name of WriteBooster buffer mode to correspond to specification (Bean Huo)
- Add patch #5: "scsi: ufs: cleanup WriteBooster feature"

Stanley Chu (8):
scsi: ufs: enable WriteBooster on some pre-3.1 UFS devices
scsi: ufs: introduce fixup_dev_quirks vops
scsi: ufs: export ufs_fixup_device_setup() function
scsi: ufs-mediatek: add fixup_dev_quirks vops
scsi: ufs: add "index" in parameter list of ufshcd_query_flag()
scsi: ufs: add LU Dedicated buffer mode support for WriteBooster
scsi: ufs-mediatek: enable WriteBooster capability
scsi: ufs: cleanup WriteBooster feature

drivers/scsi/ufs/ufs-mediatek.c | 25 ++++-
drivers/scsi/ufs/ufs-sysfs.c | 11 ++-
drivers/scsi/ufs/ufs.h | 10 ++
drivers/scsi/ufs/ufs_quirks.h | 7 ++
drivers/scsi/ufs/ufshcd.c | 156 ++++++++++++++++++++------------
drivers/scsi/ufs/ufshcd.h | 20 +++-
6 files changed, 167 insertions(+), 62 deletions(-)

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2.18.0