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scsi: ufs: introduce hibern8_notify callback 

Some UFS host controller may need to configure some things around
hibern8 enter/exit

Signed-off-by: Kiwoong Kim <kwmad.kim@samsung.com>
Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Kiwoong Kim 2016-11-10 21:17:43 +09:00 committed by Martin K. Petersen
parent d2877be42f
commit ee32c9098f
2 changed files with 22 additions and 2 deletions
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12
drivers/scsi/ufs/ufshcd.c
View File

@ -2697,6 +2697,8 @@ static int __ufshcd_uic_hibern8_enter(struct ufs_hba *hba)
int ret;
struct uic_command uic_cmd = {0};
ufshcd_vops_hibern8_notify(hba, UIC_CMD_DME_HIBER_ENTER, PRE_CHANGE);
uic_cmd.command = UIC_CMD_DME_HIBER_ENTER;
ret = ufshcd_uic_pwr_ctrl(hba, &uic_cmd);
@ -2710,7 +2712,9 @@ static int __ufshcd_uic_hibern8_enter(struct ufs_hba *hba)
*/
if (ufshcd_link_recovery(hba))
ret = -ENOLINK;
}
} else
ufshcd_vops_hibern8_notify(hba, UIC_CMD_DME_HIBER_ENTER,
POST_CHANGE);
return ret;
}
@ -2733,13 +2737,17 @@ static int ufshcd_uic_hibern8_exit(struct ufs_hba *hba)
struct uic_command uic_cmd = {0};
int ret;
ufshcd_vops_hibern8_notify(hba, UIC_CMD_DME_HIBER_EXIT, PRE_CHANGE);
uic_cmd.command = UIC_CMD_DME_HIBER_EXIT;
ret = ufshcd_uic_pwr_ctrl(hba, &uic_cmd);
if (ret) {
dev_err(hba->dev, "%s: hibern8 exit failed. ret = %d\n",
__func__, ret);
ret = ufshcd_link_recovery(hba);
}
} else
ufshcd_vops_hibern8_notify(hba, UIC_CMD_DME_HIBER_EXIT,
POST_CHANGE);
return ret;
}

12
drivers/scsi/ufs/ufshcd.h
View File

@ -265,6 +265,8 @@ struct ufs_pwr_mode_info {
* to set some things
* @setup_task_mgmt: called before any task management request is issued
* to set some things
* @hibern8_notify: called around hibern8 enter/exit
* to configure some things
* @suspend: called during host controller PM callback
* @resume: called during host controller PM callback
* @dbg_register_dump: used to dump controller debug information
@ -290,6 +292,8 @@ struct ufs_hba_variant_ops {
struct ufs_pa_layer_attr *);
void (*setup_xfer_req)(struct ufs_hba *, int, bool);
void (*setup_task_mgmt)(struct ufs_hba *, int, u8);
void (*hibern8_notify)(struct ufs_hba *, enum uic_cmd_dme,
enum ufs_notify_change_status);
int (*suspend)(struct ufs_hba *, enum ufs_pm_op);
int (*resume)(struct ufs_hba *, enum ufs_pm_op);
void (*dbg_register_dump)(struct ufs_hba *hba);
@ -821,6 +825,14 @@ static inline void ufshcd_vops_setup_task_mgmt(struct ufs_hba *hba,
return hba->vops->setup_task_mgmt(hba, tag, tm_function);
}
static inline void ufshcd_vops_hibern8_notify(struct ufs_hba *hba,
enum uic_cmd_dme cmd,
enum ufs_notify_change_status status)
{
if (hba->vops && hba->vops->hibern8_notify)
return hba->vops->hibern8_notify(hba, cmd, status);
}
static inline int ufshcd_vops_suspend(struct ufs_hba *hba, enum ufs_pm_op op)
{
if (hba->vops && hba->vops->suspend)