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| author | Bart Van Assche <bvanassche@acm.org> | 2021-07-21 20:34:32 -0700 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-08-02 21:43:58 -0400 |
| commit | 1f522c5049016cfea4f9d131ae9089e6fdba3980 (patch) | |
| tree | a3e34c741686ad55cc8137b424ee3d9f2595b7d7 /drivers/scsi/ufs/ufshcd.h | |
| parent | 815b9a27b0a3055585db37c422146067e55e0617 (diff) | |
| download | linux-stable-1f522c5049016cfea4f9d131ae9089e6fdba3980.tar.gz linux-stable-1f522c5049016cfea4f9d131ae9089e6fdba3980.tar.bz2 linux-stable-1f522c5049016cfea4f9d131ae9089e6fdba3980.zip | |
scsi: ufs: Revert "Utilize Transfer Request List Completion Notification Register"
Using the UTRLCNR register involves two MMIO accesses in the hot path while
using the doorbell register only involves a single MMIO access. Since MMIO
accesses take time, do not use the UTRLCNR register. The spinlock
contention on the SCSI host lock that is reintroduced by this commit will
be addressed later.
This reverts commit 6f7151729647e58ac7c522081255fd0c07b38105.
Link: https://lore.kernel.org/r/20210722033439.26550-12-bvanassche@acm.org
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Stanley Chu <stanley.chu@mediatek.com>
Cc: Can Guo <cang@codeaurora.org>
Cc: Asutosh Das <asutoshd@codeaurora.org>
Cc: Avri Altman <avri.altman@wdc.com>
Tested-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
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, 0 insertions, 5 deletions
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index 334b49cb00b3..56f48dd34020 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -1208,11 +1208,6 @@ static inline u32 ufshcd_vops_get_ufs_hci_version(struct ufs_hba *hba) return ufshcd_readl(hba, REG_UFS_VERSION); } -static inline bool ufshcd_has_utrlcnr(struct ufs_hba *hba) -{ - return (hba->ufs_version >= ufshci_version(3, 0)); -} - static inline int ufshcd_vops_clk_scale_notify(struct ufs_hba *hba, bool up, enum ufs_notify_change_status status) { |