scsi: ufs: introduce setup_xfer_req callback

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>

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 9ca041b..5d83f55 100644 (file)
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -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);
 

diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index afff7f4..e935fd1 100644 (file)
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -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)