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| author | Kiwoong Kim <kwmad.kim@samsung.com> | 2020-08-25 04:43:15 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-09-01 05:10:43 +0300 |
| commit | 5df6f2def50c70700555c77fbbaec03d78617064 (patch) | |
| tree | 1d5d9b1b6b6f6be46dffbe4254efd5b2982727ff /drivers/scsi/ufs/ufshcd.h | |
| parent | 32417d7844ab0bc154c39128d9ac026f4f8a7907 (diff) | |
| download | linux-5df6f2def50c70700555c77fbbaec03d78617064.tar.xz | |
scsi: ufs: Introduce skipping manual flush for Write Booster
We have two knobs to control flush for write booster,
fWriteBoosterBufferFlushDuringHibernate and fWriteBoosterBufferFlushEn.
Some vendors use only fWriteBoosterBufferFlushDuringHibernate because this
can reportedly cover most scenarios. Also, there have been some reports
that flush by fWriteBoosterBufferFlushEn could lead to increased power
consumption thanks to unexpected internal operations. Consequently, we need
a way to enable or disable fWriteBoosterEn operations. Add quirk to bypass
manual flush.
Link: https://lore.kernel.org/r/ffdb0eda30515809f0ad9ee936b26917ee9b4593.1598319701.git.kwmad.kim@samsung.com
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Kiwoong Kim <kwmad.kim@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/ufs/ufshcd.h')
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index 618b253e5ec8..a88dfac7c9e9 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -530,6 +530,11 @@ enum ufshcd_quirks { * OCS FATAL ERROR with device error through sense data */ UFSHCD_QUIRK_BROKEN_OCS_FATAL_ERROR = 1 << 10, + + /* + * This quirk needs to disable manual flush for write booster + */ + UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH_CTRL = 1 << 11, }; enum ufshcd_caps { |