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Subject[PATCH AUTOSEL 5.10 03/47] scsi: ufs: Add a quirk to permit overriding UniPro defaults
Date
From: Kiwoong Kim <kwmad.kim@samsung.com>

[ Upstream commit b1d0d2eb89d4e3a25b212a9d836587503537067e ]

The UniPro specification states that attribute IDs of the following
parameters are vendor-specific so some SoCs could have no regions at the
defined addresses:

- DME_LocalFC0ProtectionTimeOutVal
- DME_LocalTC0ReplayTimeOutVal
- DME_LocalAFC0ReqTimeOutVal

In addition, the following parameters should be set considering the
compatibility between host and device.

- PA_PWRMODEUSERDATA0
- PA_PWRMODEUSERDATA1
- PA_PWRMODEUSERDATA2
- PA_PWRMODEUSERDATA3
- PA_PWRMODEUSERDATA4
- PA_PWRMODEUSERDATA5

Introduce a quirk to allow vendor drivers to override the UniPro defaults.

Link: https://lore.kernel.org/r/1fedd3dea0ccc980913a5995a10510d86a5b01b9.1608513782.git.kwmad.kim@samsung.com
Acked-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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/scsi/ufs/ufshcd.c | 40 ++++++++++++++++++++-------------------
drivers/scsi/ufs/ufshcd.h | 6 ++++++
2 files changed, 27 insertions(+), 19 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 813289328467..379d44d6b9eb 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -4153,25 +4153,27 @@ static int ufshcd_change_power_mode(struct ufs_hba *hba,
ufshcd_dme_set(hba, UIC_ARG_MIB(PA_HSSERIES),
pwr_mode->hs_rate);

- ufshcd_dme_set(hba, UIC_ARG_MIB(PA_PWRMODEUSERDATA0),
- DL_FC0ProtectionTimeOutVal_Default);
- ufshcd_dme_set(hba, UIC_ARG_MIB(PA_PWRMODEUSERDATA1),
- DL_TC0ReplayTimeOutVal_Default);
- ufshcd_dme_set(hba, UIC_ARG_MIB(PA_PWRMODEUSERDATA2),
- DL_AFC0ReqTimeOutVal_Default);
- ufshcd_dme_set(hba, UIC_ARG_MIB(PA_PWRMODEUSERDATA3),
- DL_FC1ProtectionTimeOutVal_Default);
- ufshcd_dme_set(hba, UIC_ARG_MIB(PA_PWRMODEUSERDATA4),
- DL_TC1ReplayTimeOutVal_Default);
- ufshcd_dme_set(hba, UIC_ARG_MIB(PA_PWRMODEUSERDATA5),
- DL_AFC1ReqTimeOutVal_Default);
-
- ufshcd_dme_set(hba, UIC_ARG_MIB(DME_LocalFC0ProtectionTimeOutVal),
- DL_FC0ProtectionTimeOutVal_Default);
- ufshcd_dme_set(hba, UIC_ARG_MIB(DME_LocalTC0ReplayTimeOutVal),
- DL_TC0ReplayTimeOutVal_Default);
- ufshcd_dme_set(hba, UIC_ARG_MIB(DME_LocalAFC0ReqTimeOutVal),
- DL_AFC0ReqTimeOutVal_Default);
+ if (!(hba->quirks & UFSHCD_QUIRK_SKIP_DEF_UNIPRO_TIMEOUT_SETTING)) {
+ ufshcd_dme_set(hba, UIC_ARG_MIB(PA_PWRMODEUSERDATA0),
+ DL_FC0ProtectionTimeOutVal_Default);
+ ufshcd_dme_set(hba, UIC_ARG_MIB(PA_PWRMODEUSERDATA1),
+ DL_TC0ReplayTimeOutVal_Default);
+ ufshcd_dme_set(hba, UIC_ARG_MIB(PA_PWRMODEUSERDATA2),
+ DL_AFC0ReqTimeOutVal_Default);
+ ufshcd_dme_set(hba, UIC_ARG_MIB(PA_PWRMODEUSERDATA3),
+ DL_FC1ProtectionTimeOutVal_Default);
+ ufshcd_dme_set(hba, UIC_ARG_MIB(PA_PWRMODEUSERDATA4),
+ DL_TC1ReplayTimeOutVal_Default);
+ ufshcd_dme_set(hba, UIC_ARG_MIB(PA_PWRMODEUSERDATA5),
+ DL_AFC1ReqTimeOutVal_Default);
+
+ ufshcd_dme_set(hba, UIC_ARG_MIB(DME_LocalFC0ProtectionTimeOutVal),
+ DL_FC0ProtectionTimeOutVal_Default);
+ ufshcd_dme_set(hba, UIC_ARG_MIB(DME_LocalTC0ReplayTimeOutVal),
+ DL_TC0ReplayTimeOutVal_Default);
+ ufshcd_dme_set(hba, UIC_ARG_MIB(DME_LocalAFC0ReqTimeOutVal),
+ DL_AFC0ReqTimeOutVal_Default);
+ }

ret = ufshcd_uic_change_pwr_mode(hba, pwr_mode->pwr_rx << 4
| pwr_mode->pwr_tx);
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 6c62a281c863..fcca4e15c8cd 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -544,6 +544,12 @@ enum ufshcd_quirks {
*/
UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH_CTRL = 1 << 12,

+ /*
+ * This quirk needs to disable unipro timeout values
+ * before power mode change
+ */
+ UFSHCD_QUIRK_SKIP_DEF_UNIPRO_TIMEOUT_SETTING = 1 << 13,
+
};

enum ufshcd_caps {
--
2.30.1
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