Re: [PATCH v3 6/6] scsi: ufs: add dme control primitives

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>  /**
> + * ufshcd_dme_power_xxx - UIC command for DME_POWERON, DME_POWEROFF
> + * @hba: per adapter instance
> + * @on: indicate wherter power_on or power_off
> + *
> + * Returns 0 on success, non-zero value on failure
> + */
> +int ufshcd_dme_power_xxx(struct ufs_hba *hba, u8 on)
> +{
> +       struct uic_command uic_cmd = {0};
> +       static const char *const action[] = {
> +               "dme-power-off",
> +               "dme-power-on"
> +       };
> +       const char *power = action[!!on];
> +       int ret;
> +
> +       uic_cmd.command = on ?
> +               UIC_CMD_DME_POWERON : UIC_CMD_DME_POWEROFF;
> +
> +       ret = ufshcd_send_uic_cmd(hba, &uic_cmd);
> +       if (ret)
> +               dev_err(hba->dev, "%s: error code %d\n", power, ret);
> +
> +       return ret;
> +}
> +EXPORT_SYMBOL_GPL(ufshcd_dme_power_xxx);
> +
> +/**
> + * ufshcd_dme_hibern8_xxx - UIC command for DME_HIBERNATE_ENTER,
> + *                         DME_HIBERNATE_EXIT
> + * @hba: per adapter instance
> + * @enter: indicate wherter hibernation enter or exit
> + *
> + * Returns 0 on success, non-zero value on failure
> + */
> +int ufshcd_dme_hibern8_xxx(struct ufs_hba *hba, u8 enter)
> +{
> +       struct uic_command uic_cmd = {0};
> +       static const char *const action[] = {
> +               "dme-hibernate-exit",
> +               "dme-hibernate-enter"
> +       };
> +       const char *hibern8 = action[!!enter];
> +       u8 status;
> +       int ret;
> +
> +       uic_cmd.command = enter ?
> +               UIC_CMD_DME_HIBER_ENTER : UIC_CMD_DME_HIBER_EXIT;
> +
> +       mutex_lock(&hba->uic_cmd_mutex);
> +       init_completion(&hba->hibern8_done);
> +       ret = __ufshcd_send_uic_cmd(hba, &uic_cmd);
> +       if (ret) {
> +               dev_err(hba->dev, "%s: error code %d\n", hibern8, ret);
> +               goto out;
> +       }
> +
> +       if (wait_for_completion_timeout(&hba->hibern8_done,
> +                                       msecs_to_jiffies(UIC_CMD_TIMEOUT))) {
> +               status = ufshcd_get_upmcrs(hba);
> +               if (status != PWR_LOCAL) {
> +                       dev_err(hba->dev, "%s: failed, host upmcrs:%x\n",
> +                               hibern8, status);
> +                       ret = status;
> +               }
> +       } else {
> +               dev_err(hba->dev, "%s: timeout\n", hibern8);
> +               ret = -ETIMEDOUT;
> +       }
> +out:
> +       mutex_unlock(&hba->uic_cmd_mutex);
> +       return ret;
> +}
> +EXPORT_SYMBOL_GPL(ufshcd_dme_hibern8_xxx);
> +


power/hibernate functions can also be renamed as
ufshcd_dme_power/hibernate_config(struct ufs_hba *hba, bool
enable/enter) or similar instead of xxx.


-- 
~Santosh
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