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| author | Can Guo <cang@codeaurora.org> | 2021-05-24 01:36:58 -0700 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-06-07 22:18:03 -0400 |
| commit | 6f7151729647e58ac7c522081255fd0c07b38105 (patch) | |
| tree | 122a0941a900c9e6bb2d93869a98eb227db1df53 /drivers/scsi/ufs/ufshcd.h | |
| parent | a45f937110fa6b0c2c06a5d3ef026963a5759050 (diff) | |
| download | lwn-6f7151729647e58ac7c522081255fd0c07b38105.tar.gz lwn-6f7151729647e58ac7c522081255fd0c07b38105.zip | |
scsi: ufs: Utilize Transfer Request List Completion Notification Register
By reading the UTP Transfer Request List Completion Notification Register,
which is added in UFSHCI Ver 3.0, SW can easily get the compeleted transfer
requests. Thus, SW can get rid of host lock, which is used to synchronize
the tr_doorbell and outstanding_reqs, on transfer requests dispatch and
completion paths. This can further benefit random read/write performance.
Link: https://lore.kernel.org/r/1621845419-14194-4-git-send-email-cang@codeaurora.org
Cc: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Co-developed-by: Asutosh Das <asutoshd@codeaurora.org>
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
Signed-off-by: Can Guo <cang@codeaurora.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, 5 insertions, 0 deletions
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index fc65175c40c9..c98d540ac044 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -1160,6 +1160,11 @@ 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) { |