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scsi: ufs: Do not clear the DL layer timers

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During power mode change, PACP_PWR_Req frame sends PAPowerModeUserData
parameters (and they are considered valid by device if Flags[4] -
UserDataValid bit is set in the same frame).  Currently we don't set these
PAPowerModeUserData parameters and hardware always sets UserDataValid bit
which would clear all the DL layer timeout values of the peer device after
the power mode change.

This change sets the PAPowerModeUserData[0..5] to UniPro specification
recommended default values, in addition we are also setting the relevant
DME_LOCAL_* timer attributes as required by UFS HCI specification.

Link: https://lore.kernel.org/r/0101016ed3d688a4-cfaeb1c9-238b-46c4-9c89-d48c410ba325-000000@us-west-2.amazonses.com
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Can Guo 2019-12-05 02:14:42 +00:00 committed by Martin K. Petersen
parent 17c7d35f14
commit 0834253734
2 changed files with 31 additions and 0 deletions
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20
drivers/scsi/ufs/ufshcd.c
View file

@ -4033,6 +4033,26 @@ 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);
ret = ufshcd_uic_change_pwr_mode(hba, pwr_mode->pwr_rx << 4
| pwr_mode->pwr_tx);

11
drivers/scsi/ufs/unipro.h
View file

@ -161,6 +161,17 @@
/* PHY Adapter Protocol Constants */
#define PA_MAXDATALANES 4
#define DL_FC0ProtectionTimeOutVal_Default 8191
#define DL_TC0ReplayTimeOutVal_Default 65535
#define DL_AFC0ReqTimeOutVal_Default 32767
#define DL_FC1ProtectionTimeOutVal_Default 8191
#define DL_TC1ReplayTimeOutVal_Default 65535
#define DL_AFC1ReqTimeOutVal_Default 32767
#define DME_LocalFC0ProtectionTimeOutVal 0xD041
#define DME_LocalTC0ReplayTimeOutVal 0xD042
#define DME_LocalAFC0ReqTimeOutVal 0xD043
/* PA power modes */
enum {
FAST_MODE = 1,