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Commit a30de0e0 authored by Stanley Chu's avatar Stanley Chu Committed by Todd Kjos
Browse files

FROMGIT: 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: default avatarAvri Altman <avri.altman@wdc.com>
Reviewed-by: default avatarBean Huo <beanhuo@micron.com>
Signed-off-by: default avatarStanley Chu <stanley.chu@mediatek.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>

Bug: 140620770
(cherry pick from 49615ba144a0929c725d08f0d3ba8494c8b77404
 https://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git

 misc)
Change-Id: I35bc8d52c73db5d9e6936c5fbfb728b5436fcf1f
Signed-off-by: default avatarTodd Kjos <tkjos@google.com>
parent f58546ba

drivers/scsi/ufs/ufshcd.c

+7 −0
Original line number Diff line number Diff line
@@ -89,6 +89,9 @@ 
/* 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;                                               \
@@ -4668,6 +4671,9 @@ static int ufshcd_slave_configure(struct scsi_device *sdev) 


	ufshcd_crypto_setup_rq_keyslot_manager(hba, q);



	if (ufshcd_is_rpm_autosuspend_allowed(hba))

		sdev->rpm_autosuspend = 1;



	return 0;

}
@@ -7109,6 +7115,7 @@ 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,

drivers/scsi/ufs/ufshcd.h

+10 −0
Original line number Diff line number Diff line
@@ -755,6 +755,12 @@ struct ufs_hba { 
	 * inline crypto engine, if it is present

	 */

#define UFSHCD_CAP_CRYPTO (1 << 6)

	/*

	 * 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;
@@ -797,6 +803,10 @@ 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)

{