Commit 5ac6abc9 authored by Alim Akhtar's avatar Alim Akhtar Committed by Martin K. Petersen

scsi: ufs: add quirk to disallow reset of interrupt aggregation

Some host controllers support interrupt aggregation but don't allow
resetting counter and timer in software.
Signed-off-by: default avatarSeungwon Jeon <essuuj@gmail.com>
Signed-off-by: default avatarAlim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: default avatarSubhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 1399c5b0
...@@ -4659,7 +4659,8 @@ static void ufshcd_transfer_req_compl(struct ufs_hba *hba) ...@@ -4659,7 +4659,8 @@ static void ufshcd_transfer_req_compl(struct ufs_hba *hba)
* false interrupt if device completes another request after resetting * false interrupt if device completes another request after resetting
* aggregation and before reading the DB. * aggregation and before reading the DB.
*/ */
if (ufshcd_is_intr_aggr_allowed(hba)) if (ufshcd_is_intr_aggr_allowed(hba) &&
!(hba->quirks & UFSHCI_QUIRK_SKIP_RESET_INTR_AGGR))
ufshcd_reset_intr_aggr(hba); ufshcd_reset_intr_aggr(hba);
tr_doorbell = ufshcd_readl(hba, REG_UTP_TRANSFER_REQ_DOOR_BELL); tr_doorbell = ufshcd_readl(hba, REG_UTP_TRANSFER_REQ_DOOR_BELL);
......
...@@ -600,6 +600,12 @@ struct ufs_hba { ...@@ -600,6 +600,12 @@ struct ufs_hba {
*/ */
#define UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR 0x100 #define UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR 0x100
/*
* This quirk needs to be enabled if host controller doesn't allow
* that the interrupt aggregation timer and counter are reset by s/w.
*/
#define UFSHCI_QUIRK_SKIP_RESET_INTR_AGGR 0x200
unsigned int quirks; /* Deviations from standard UFSHCI spec. */ unsigned int quirks; /* Deviations from standard UFSHCI spec. */
/* Device deviations from standard UFS device spec. */ /* Device deviations from standard UFS device spec. */
......
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