diff options
| author | Stanley Chu <stanley.chu@mediatek.com> | 2019-09-16 23:56:50 +0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2019-09-30 23:01:17 -0400 |
| commit | 49615ba144a0929c725d08f0d3ba8494c8b77404 (patch) | |
| tree | d25d1b12cb4d071cd5c5deba3ce8a7a9411b093d /drivers/scsi/ufs | |
| parent | c74f8056621738f5be9f5d3d7e0caa927b21aef6 (diff) | |
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>
Diffstat (limited to 'drivers/scsi/ufs')
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.c | 9 | ||||
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.h | 10 |
2 files changed, 19 insertions, 0 deletions
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 034dd9cb9ec8..b580685eebcc 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 c94cfda52829..e0fe247c719e 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) { |