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author | Can Guo <quic_cang@quicinc.com> | 2023-11-02 04:58:36 +0300 |
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committer | Martin K. Petersen <martin.petersen@oracle.com> | 2023-11-15 18:23:55 +0300 |
commit | 4f6dd2a4bf378bc4d169296739ea7d6972c0d858 (patch) | |
tree | cf632f7658bd2000471d067dc975b8a5f4afb727 /drivers/ufs | |
parent | 2aee050cefdaaab9e65ce0894e2a784aac15b70c (diff) | |
download | linux-4f6dd2a4bf378bc4d169296739ea7d6972c0d858.tar.xz |
scsi: ufs: ufs-sysfs: Expose UFS power info
Having UFS power info available in sysfs makes it easier to tell the state
of the link during runtime considering we have a bunch of power saving
features and various combinations for backward compatibility.
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Can Guo <quic_cang@quicinc.com>
Link: https://lore.kernel.org/r/1698890324-7374-1-git-send-email-quic_cang@quicinc.com
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/ufs')
-rw-r--r-- | drivers/ufs/core/ufs-sysfs.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/drivers/ufs/core/ufs-sysfs.c b/drivers/ufs/core/ufs-sysfs.c index c95906443d5f..05b10ca90b50 100644 --- a/drivers/ufs/core/ufs-sysfs.c +++ b/drivers/ufs/core/ufs-sysfs.c @@ -7,9 +7,56 @@ #include <asm/unaligned.h> #include <ufs/ufs.h> +#include <ufs/unipro.h> #include "ufs-sysfs.h" #include "ufshcd-priv.h" +static const char *ufs_pa_pwr_mode_to_string(enum ufs_pa_pwr_mode mode) +{ + switch (mode) { + case FAST_MODE: return "FAST_MODE"; + case SLOW_MODE: return "SLOW_MODE"; + case FASTAUTO_MODE: return "FASTAUTO_MODE"; + case SLOWAUTO_MODE: return "SLOWAUTO_MODE"; + default: return "UNKNOWN"; + } +} + +static const char *ufs_hs_gear_rate_to_string(enum ufs_hs_gear_rate rate) +{ + switch (rate) { + case PA_HS_MODE_A: return "HS_RATE_A"; + case PA_HS_MODE_B: return "HS_RATE_B"; + default: return "UNKNOWN"; + } +} + +static const char *ufs_pwm_gear_to_string(enum ufs_pwm_gear_tag gear) +{ + switch (gear) { + case UFS_PWM_G1: return "PWM_GEAR1"; + case UFS_PWM_G2: return "PWM_GEAR2"; + case UFS_PWM_G3: return "PWM_GEAR3"; + case UFS_PWM_G4: return "PWM_GEAR4"; + case UFS_PWM_G5: return "PWM_GEAR5"; + case UFS_PWM_G6: return "PWM_GEAR6"; + case UFS_PWM_G7: return "PWM_GEAR7"; + default: return "UNKNOWN"; + } +} + +static const char *ufs_hs_gear_to_string(enum ufs_hs_gear_tag gear) +{ + switch (gear) { + case UFS_HS_G1: return "HS_GEAR1"; + case UFS_HS_G2: return "HS_GEAR2"; + case UFS_HS_G3: return "HS_GEAR3"; + case UFS_HS_G4: return "HS_GEAR4"; + case UFS_HS_G5: return "HS_GEAR5"; + default: return "UNKNOWN"; + } +} + static const char *ufshcd_uic_link_state_to_string( enum uic_link_state state) { @@ -628,6 +675,78 @@ static const struct attribute_group ufs_sysfs_monitor_group = { .attrs = ufs_sysfs_monitor_attrs, }; +static ssize_t lane_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct ufs_hba *hba = dev_get_drvdata(dev); + + return sysfs_emit(buf, "%u\n", hba->pwr_info.lane_rx); +} + +static ssize_t mode_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct ufs_hba *hba = dev_get_drvdata(dev); + + return sysfs_emit(buf, "%s\n", ufs_pa_pwr_mode_to_string(hba->pwr_info.pwr_rx)); +} + +static ssize_t rate_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct ufs_hba *hba = dev_get_drvdata(dev); + + return sysfs_emit(buf, "%s\n", ufs_hs_gear_rate_to_string(hba->pwr_info.hs_rate)); +} + +static ssize_t gear_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct ufs_hba *hba = dev_get_drvdata(dev); + + return sysfs_emit(buf, "%s\n", hba->pwr_info.hs_rate ? + ufs_hs_gear_to_string(hba->pwr_info.gear_rx) : + ufs_pwm_gear_to_string(hba->pwr_info.gear_rx)); +} + +static ssize_t dev_pm_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct ufs_hba *hba = dev_get_drvdata(dev); + + return sysfs_emit(buf, "%s\n", ufshcd_ufs_dev_pwr_mode_to_string(hba->curr_dev_pwr_mode)); +} + +static ssize_t link_state_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ufs_hba *hba = dev_get_drvdata(dev); + + return sysfs_emit(buf, "%s\n", ufshcd_uic_link_state_to_string(hba->uic_link_state)); +} + +static DEVICE_ATTR_RO(lane); +static DEVICE_ATTR_RO(mode); +static DEVICE_ATTR_RO(rate); +static DEVICE_ATTR_RO(gear); +static DEVICE_ATTR_RO(dev_pm); +static DEVICE_ATTR_RO(link_state); + +static struct attribute *ufs_power_info_attrs[] = { + &dev_attr_lane.attr, + &dev_attr_mode.attr, + &dev_attr_rate.attr, + &dev_attr_gear.attr, + &dev_attr_dev_pm.attr, + &dev_attr_link_state.attr, + NULL +}; + +static const struct attribute_group ufs_sysfs_power_info_group = { + .name = "power_info", + .attrs = ufs_power_info_attrs, +}; + static ssize_t ufs_sysfs_read_desc_param(struct ufs_hba *hba, enum desc_idn desc_id, u8 desc_index, @@ -1233,6 +1352,7 @@ static const struct attribute_group *ufs_sysfs_groups[] = { &ufs_sysfs_default_group, &ufs_sysfs_capabilities_group, &ufs_sysfs_monitor_group, + &ufs_sysfs_power_info_group, &ufs_sysfs_device_descriptor_group, &ufs_sysfs_interconnect_descriptor_group, &ufs_sysfs_geometry_descriptor_group, |