scsi: ufs: override auto suspend tunables for ufs
Rework from previous work by:
Sujit Reddy Thumma <sthumma@codeaurora.org>
Override auto suspend tunables for UFS device LUNs during initialization so
as to efficiently manage background operations and the power consumption.
Link: https://lore.kernel.org/r/1568649411-5127-3-git-send-email-stanley.chu@mediatek.com
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
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 034dd9c..b580685 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -88,6 +88,9 @@
/* Interrupt aggregation default timeout, unit: 40us */
#define INT_AGGR_DEF_TO 0x02
+/* default delay of autosuspend: 2000 ms */
+#define RPM_AUTOSUSPEND_DELAY_MS 2000
+
#define ufshcd_toggle_vreg(_dev, _vreg, _on) \
({ \
int _ret; \
@@ -4631,9 +4634,14 @@ static int ufshcd_change_queue_depth(struct scsi_device *sdev, int depth)
*/
static int ufshcd_slave_configure(struct scsi_device *sdev)
{
+ struct ufs_hba *hba = shost_priv(sdev->host);
struct request_queue *q = sdev->request_queue;
blk_queue_update_dma_pad(q, PRDT_DATA_BYTE_COUNT_PAD - 1);
+
+ if (ufshcd_is_rpm_autosuspend_allowed(hba))
+ sdev->rpm_autosuspend = 1;
+
return 0;
}
@@ -7069,6 +7077,7 @@ static struct scsi_host_template ufshcd_driver_template = {
.track_queue_depth = 1,
.sdev_groups = ufshcd_driver_groups,
.dma_boundary = PAGE_SIZE - 1,
+ .rpm_autosuspend_delay = RPM_AUTOSUSPEND_DELAY_MS,
};
static int ufshcd_config_vreg_load(struct device *dev, struct ufs_vreg *vreg,
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index c94cfda..e0fe247 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -716,6 +716,12 @@ struct ufs_hba {
* the performance of ongoing read/write operations.
*/
#define UFSHCD_CAP_KEEP_AUTO_BKOPS_ENABLED_EXCEPT_SUSPEND (1 << 5)
+ /*
+ * This capability allows host controller driver to automatically
+ * enable runtime power management by itself instead of waiting
+ * for userspace to control the power management.
+ */
+#define UFSHCD_CAP_RPM_AUTOSUSPEND (1 << 6)
struct devfreq *devfreq;
struct ufs_clk_scaling clk_scaling;
@@ -749,6 +755,10 @@ static inline bool ufshcd_can_autobkops_during_suspend(struct ufs_hba *hba)
{
return hba->caps & UFSHCD_CAP_AUTO_BKOPS_SUSPEND;
}
+static inline bool ufshcd_is_rpm_autosuspend_allowed(struct ufs_hba *hba)
+{
+ return hba->caps & UFSHCD_CAP_RPM_AUTOSUSPEND;
+}
static inline bool ufshcd_is_intr_aggr_allowed(struct ufs_hba *hba)
{
