[PATCH] scsi: ufs: add ufs a command complete time stamp

Zang Leigang
2017-09-20T10:30:55Z

Signed-off-by: Zang Leigang <zangleigang@hisilicon.com>

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 794a4600e952..2984f33095be 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -385,6 +385,8 @@ void ufshcd_print_trs(struct ufs_hba *hba, unsigned long bitmap, bool pr_prdt)

dev_err(hba->dev, "UPIU[%d] - issue time %lld us\n",
tag, ktime_to_us(lrbp->issue_time_stamp));
+ dev_err(hba->dev, "UPIU[%d] - complete time %lld us\n",
+ tag, ktime_to_us(lrbp->complete_time_stamp));
dev_err(hba->dev,
"UPIU[%d] - Transfer Request Descriptor phys@0x%llx\n",
tag, (u64)lrbp->utrd_dma_addr);
@@ -1746,6 +1748,7 @@ static inline
void ufshcd_send_command(struct ufs_hba *hba, unsigned int task_tag)
{
hba->lrb[task_tag].issue_time_stamp = ktime_get();
+ hba->lrb[task_tag].complete_time_stamp.tv64 = 0UL;
ufshcd_clk_scaling_start_busy(hba);
__set_bit(task_tag, &hba->outstanding_reqs);
ufshcd_writel(hba, 1 << task_tag, REG_UTP_TRANSFER_REQ_DOOR_BELL);
@@ -4627,6 +4630,8 @@ static void __ufshcd_transfer_req_compl(struct ufs_hba *hba,
}
if (ufshcd_is_clkscaling_supported(hba))
hba->clk_scaling.active_reqs--;
+
+ lrbp->complete_time_stamp = ktime_get();
}

/* clear corresponding bits of completed commands */
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index cdc8bd05f7df..67a8f8ef1b06 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -166,6 +166,7 @@ struct ufs_pm_lvl_states {
* @lun: LUN of the command
* @intr_cmd: Interrupt command (doesn't participate in interrupt aggregation)
* @issue_time_stamp: time stamp for debug purposes
+ * @complete_time_stamp: time stamp for statistics
* @req_abort_skip: skip request abort task flag
*/
struct ufshcd_lrb {
@@ -189,6 +190,7 @@ struct ufshcd_lrb {
u8 lun; /* UPIU LUN id field is only 8-bit wide */
bool intr_cmd;
ktime_t issue_time_stamp;
+ ktime_t complete_time_stamp;

bool req_abort_skip;
};
--
2.14.1