From: Can Guo Date: Thu, 13 Feb 2025 08:00:03 +0000 (+0800) Subject: scsi: ufs: core: Add a vop to map clock frequency to gear speed X-Git-Tag: v6.15-rc1~164^2~40^2~5 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d7bead60b08e61abde46d63eae6cd72f44939358;p=thirdparty%2Fkernel%2Fstable.git scsi: ufs: core: Add a vop to map clock frequency to gear speed Add a vop to map UFS host controller clock frequencies to the corresponding maximum supported UFS high speed gear speeds. During clock scaling, we can map the target clock frequency, demanded by devfreq, to the maximum supported gear speed, so that devfreq can scale the gear to the highest gear speed supported at the target clock frequency, instead of just scaling up/down the gear between the min and max gear speeds. Co-developed-by: Ziqi Chen Signed-off-by: Ziqi Chen Signed-off-by: Can Guo Link: https://lore.kernel.org/r/20250213080008.2984807-4-quic_ziqichen@quicinc.com Reviewed-by: Bean Huo Reviewed-by: Bart Van Assche Tested-by: Neil Armstrong Reviewed-by: Peter Wang Signed-off-by: Martin K. Petersen --- diff --git a/drivers/ufs/core/ufshcd-priv.h b/drivers/ufs/core/ufshcd-priv.h index dbdcf5219f267..37851efa6d5a6 100644 --- a/drivers/ufs/core/ufshcd-priv.h +++ b/drivers/ufs/core/ufshcd-priv.h @@ -271,6 +271,14 @@ static inline int ufshcd_mcq_vops_config_esi(struct ufs_hba *hba) return -EOPNOTSUPP; } +static inline u32 ufshcd_vops_freq_to_gear_speed(struct ufs_hba *hba, unsigned long freq) +{ + if (hba->vops && hba->vops->freq_to_gear_speed) + return hba->vops->freq_to_gear_speed(hba, freq); + + return 0; +} + extern const struct ufs_pm_lvl_states ufs_pm_lvl_states[]; /** diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h index e069fc6bc35ca..199c2cec29d0b 100644 --- a/include/ufs/ufshcd.h +++ b/include/ufs/ufshcd.h @@ -336,6 +336,7 @@ struct ufs_pwr_mode_info { * @get_outstanding_cqs: called to get outstanding completion queues * @config_esi: called to config Event Specific Interrupt * @config_scsi_dev: called to configure SCSI device parameters + * @freq_to_gear_speed: called to map clock frequency to the max supported gear speed */ struct ufs_hba_variant_ops { const char *name; @@ -384,6 +385,7 @@ struct ufs_hba_variant_ops { unsigned long *ocqs); int (*config_esi)(struct ufs_hba *hba); void (*config_scsi_dev)(struct scsi_device *sdev); + u32 (*freq_to_gear_speed)(struct ufs_hba *hba, unsigned long freq); }; /* clock gating state */