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| author | Alim Akhtar <alim.akhtar@samsung.com> | 2020-05-28 06:46:49 +0530 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-06-15 14:04:07 -0400 |
| commit | 871838412adf533ffda0b4a0ede0c2984e3511e7 (patch) | |
| tree | 874a4e311b6277071cffcec5d2570f0d17ba6d9a /drivers | |
| parent | b3a9e3b9622ae10064826dccb4f7a52bd88c7407 (diff) | |
| download | lwn-871838412adf533ffda0b4a0ede0c2984e3511e7.tar.gz lwn-871838412adf533ffda0b4a0ede0c2984e3511e7.zip | |
scsi: ufs: Add quirk to fix mishandling utrlclr/utmrlclr
With the correct behavior, setting the bit to '0' indicates clear and '1'
indicates no change. If host controller handles this the other way around,
UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR can be used.
Link: https://lore.kernel.org/r/20200528011658.71590-2-alim.akhtar@samsung.com
Reviewed-by: Can Guo <cang@codeaurora.org>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Seungwon Jeon <essuuj@gmail.com>
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.c | 11 | ||||
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.h | 5 |
2 files changed, 14 insertions, 2 deletions
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index ad4fc829cbb2..97d86f774ef1 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -672,7 +672,11 @@ static inline int ufshcd_get_tr_ocs(struct ufshcd_lrb *lrbp) */ static inline void ufshcd_utrl_clear(struct ufs_hba *hba, u32 pos) { - ufshcd_writel(hba, ~(1 << pos), REG_UTP_TRANSFER_REQ_LIST_CLEAR); + if (hba->quirks & UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR) + ufshcd_writel(hba, (1 << pos), REG_UTP_TRANSFER_REQ_LIST_CLEAR); + else + ufshcd_writel(hba, ~(1 << pos), + REG_UTP_TRANSFER_REQ_LIST_CLEAR); } /** @@ -682,7 +686,10 @@ static inline void ufshcd_utrl_clear(struct ufs_hba *hba, u32 pos) */ static inline void ufshcd_utmrl_clear(struct ufs_hba *hba, u32 pos) { - ufshcd_writel(hba, ~(1 << pos), REG_UTP_TASK_REQ_LIST_CLEAR); + if (hba->quirks & UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR) + ufshcd_writel(hba, (1 << pos), REG_UTP_TASK_REQ_LIST_CLEAR); + else + ufshcd_writel(hba, ~(1 << pos), REG_UTP_TASK_REQ_LIST_CLEAR); } /** diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index bf97d616e597..ff0521a08365 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -520,6 +520,11 @@ enum ufshcd_quirks { * ops (get_ufs_hci_version) to get the correct version. */ UFSHCD_QUIRK_BROKEN_UFS_HCI_VERSION = 1 << 5, + + /* + * Clear handling for transfer/task request list is just opposite. + */ + UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR = 1 << 6, }; enum ufshcd_caps { |