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| author |   Nitin Rawat <quic_nitirawa@quicinc.com> | 2025-07-14 13:23:35 +0530 |
|---|---|---|
| committer |   Martin K. Petersen <martin.petersen@oracle.com> | 2025-07-14 18:25:10 -0400 |
| commit | c49601642f95c8c6787acb07881f2495bc8aeb27 (patch) | |
| tree | e735db0d19ff9c1f6c1a3c26c2979698b84afd20 | |
| parent | scsi: ufs: ufs-qcom: Update esi_vec_mask for HW major version >= 6 (diff) | |
| download | wireguard-linux-c49601642f95c8c6787acb07881f2495bc8aeb27.tar.xz wireguard-linux-c49601642f95c8c6787acb07881f2495bc8aeb27.zip | |
scsi: ufs: core: Add ufshcd_dme_rmw() to modify DME attributes
Introduce ufshcd_dme_rmw() API to read, modify, and write DME attributes
in UFS host controllers using a mask and value.
Signed-off-by: Nitin Rawat <quic_nitirawa@quicinc.com>
Link: https://lore.kernel.org/r/20250714075336.2133-3-quic_nitirawa@quicinc.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/ufs/core/ufshcd.c | 24 | ||||
| -rw-r--r-- | include/ufs/ufshcd.h | 1 |
2 files changed, 25 insertions, 0 deletions
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index 4410e7d93b7d..a69aa5560932 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -4254,6 +4254,30 @@ out: EXPORT_SYMBOL_GPL(ufshcd_dme_get_attr); /** + * ufshcd_dme_rmw - get modify set a DME attribute + * @hba: per adapter instance + * @mask: indicates which bits to clear from the value that has been read + * @val: actual value to write + * @attr: dme attribute + */ +int ufshcd_dme_rmw(struct ufs_hba *hba, u32 mask, + u32 val, u32 attr) +{ + u32 cfg = 0; + int err; + + err = ufshcd_dme_get(hba, UIC_ARG_MIB(attr), &cfg); + if (err) + return err; + + cfg &= ~mask; + cfg |= (val & mask); + + return ufshcd_dme_set(hba, UIC_ARG_MIB(attr), cfg); +} +EXPORT_SYMBOL_GPL(ufshcd_dme_rmw); + +/** * ufshcd_uic_pwr_ctrl - executes UIC commands (which affects the link power * state) and waits for it to take effect. * diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h index 9b3515cee711..1d3943777584 100644 --- a/include/ufs/ufshcd.h +++ b/include/ufs/ufshcd.h @@ -1480,6 +1480,7 @@ void ufshcd_resume_complete(struct device *dev); bool ufshcd_is_hba_active(struct ufs_hba *hba); void ufshcd_pm_qos_init(struct ufs_hba *hba); void ufshcd_pm_qos_exit(struct ufs_hba *hba); +int ufshcd_dme_rmw(struct ufs_hba *hba, u32 mask, u32 val, u32 attr); /* Wrapper functions for safely calling variant operations */ static inline int ufshcd_vops_init(struct ufs_hba *hba) |