[PATCH v3 07/13] scsi: ufs: add specific callback for nexus type

Alim Akhtar
2015-10-01T08:23:12Z

From: Seungwon Jeon <essuuj@gmail.com>

Some host controller needs nexus type information for handling
command. This change adds specific callback function to support
vendor's implementation.

Signed-off-by: Seungwon Jeon <essuuj@gmail.com>
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
---
drivers/scsi/ufs/ufshcd.c | 6 ++++++
drivers/scsi/ufs/ufshcd.h | 6 ++++++
2 files changed, 12 insertions(+)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 07659be..46f92fe 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -1378,6 +1378,8 @@ 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);
+ if (hba->vops && hba->vops->specify_nexus_t_xfer_req)
+ hba->vops->specify_nexus_t_xfer_req(hba, tag, lrbp->cmd);
ufshcd_send_command(hba, tag);
out_unlock:
spin_unlock_irqrestore(hba->host->host_lock, flags);
@@ -1578,6 +1580,8 @@ static int ufshcd_exec_dev_cmd(struct ufs_hba *hba,
hba->dev_cmd.complete = &wait;

spin_lock_irqsave(hba->host->host_lock, flags);
+ if (hba->vops && hba->vops->specify_nexus_t_xfer_req)
+ hba->vops->specify_nexus_t_xfer_req(hba, tag, lrbp->cmd);
ufshcd_send_command(hba, tag);
spin_unlock_irqrestore(hba->host->host_lock, flags);

@@ -3849,6 +3853,8 @@ static int ufshcd_issue_tm_cmd(struct ufs_hba *hba, int lun_id, int task_id,
task_req_upiup->input_param2 = cpu_to_be32(task_id);

/* send command to the controller */
+ if (hba->vops && hba->vops->specify_nexus_t_tm_req)
+ hba->vops->specify_nexus_t_tm_req(hba, free_slot, tm_function);
__set_bit(free_slot, &hba->outstanding_tasks);
ufshcd_writel(hba, 1 << free_slot, REG_UTP_TASK_REQ_DOOR_BELL);

diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index a4543c8..75af314 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -257,6 +257,9 @@ 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.
+ * @specify_nexus_t_xfer_req:
+ * @specify_nexus_t_tm_req: called before command is issued to allow vendor
+ * specific handling to be set for nexus type.
* @suspend: called during host controller PM callback
* @resume: called during host controller PM callback
*/
@@ -273,6 +276,9 @@ struct ufs_hba_variant_ops {
int (*pwr_change_notify)(struct ufs_hba *,
bool, struct ufs_pa_layer_attr *,
struct ufs_pa_layer_attr *);
+ void (*specify_nexus_t_xfer_req)(struct ufs_hba *,
+ int, struct scsi_cmnd *);
+ void (*specify_nexus_t_tm_req)(struct ufs_hba *, int, u8);
int (*suspend)(struct ufs_hba *, enum ufs_pm_op);
int (*resume)(struct ufs_hba *, enum ufs_pm_op);
};
--
1.7.10.4