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scsi: ufs: introduce setup_xfer_req callback

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Some UFS host controller may need to configure some things before any
transfer request is issued.

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 21:14:36 +09:00 committed by Martin K. Petersen
parent bc2bb1543e
commit 0e675efa9e
2 changed files with 12 additions and 0 deletions
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2
drivers/scsi/ufs/ufshcd.c
View File

@ -1516,6 +1516,7 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
/* issue command to the controller */
spin_lock_irqsave(hba->host->host_lock, flags);
ufshcd_vops_setup_xfer_req(hba, tag, (lrbp->cmd ? true : false));
ufshcd_send_command(hba, tag);
out_unlock:
spin_unlock_irqrestore(hba->host->host_lock, flags);
@ -1727,6 +1728,7 @@ static int ufshcd_exec_dev_cmd(struct ufs_hba *hba,
/* Make sure descriptors are ready before ringing the doorbell */
wmb();
spin_lock_irqsave(hba->host->host_lock, flags);
ufshcd_vops_setup_xfer_req(hba, tag, (lrbp->cmd ? true : false));
ufshcd_send_command(hba, tag);
spin_unlock_irqrestore(hba->host->host_lock, flags);

10
drivers/scsi/ufs/ufshcd.h
View File

@ -261,6 +261,8 @@ struct ufs_pwr_mode_info {
* @pwr_change_notify: called before and after a power mode change
* is carried out to allow vendor spesific capabilities
* to be set.
* @setup_xfer_req: called before any transfer request is issued
* to set 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
@ -284,6 +286,7 @@ struct ufs_hba_variant_ops {
enum ufs_notify_change_status status,
struct ufs_pa_layer_attr *,
struct ufs_pa_layer_attr *);
void (*setup_xfer_req)(struct ufs_hba *, int, bool);
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);
@ -801,6 +804,13 @@ static inline int ufshcd_vops_pwr_change_notify(struct ufs_hba *hba,
return -ENOTSUPP;
}
static inline void ufshcd_vops_setup_xfer_req(struct ufs_hba *hba, int tag,
bool is_scsi_cmd)
{
if (hba->vops && hba->vops->setup_xfer_req)
return hba->vops->setup_xfer_req(hba, tag, is_scsi_cmd);
}
static inline int ufshcd_vops_suspend(struct ufs_hba *hba, enum ufs_pm_op op)
{
if (hba->vops && hba->vops->suspend)