diff options
author | subhashj@codeaurora.org <subhashj@codeaurora.org> | 2016-12-22 18:41:22 -0800 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-21 09:23:23 +0100 |
commit | cfb09f0571a5fa16ae00f8291f6128d4cf5bf37a (patch) | |
tree | dfe3c21e13b10ae539067d139a6f54b7be9e7fd2 /drivers/scsi | |
parent | ea56533994fea513aac714b50a580cdcaccb0ef9 (diff) |
scsi: ufs: add capability to keep auto bkops always enabled
[ Upstream commit 4e768e7645ec4ffa92ee163643777b261ae97142 ]
UFS device requires to perform bkops (back ground operations) periodically
but host can control (via auto-bkops parameter of device) when device can
perform bkops based on its performance requirements. In general, host
would like to enable the device's auto-bkops only when it's not doing any
regular data transfer but sometimes device may not behave properly if host
keeps the auto-bkops disabled. This change adds the capability to let the
device auto-bkops always enabled except suspend.
Reviewed-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/scsi')
-rw-r--r-- | drivers/scsi/ufs/ufshcd.c | 33 | ||||
-rw-r--r-- | drivers/scsi/ufs/ufshcd.h | 13 |
2 files changed, 35 insertions, 11 deletions
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index edb06e466224..530034bc2d13 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -3781,18 +3781,25 @@ out: } /** - * ufshcd_force_reset_auto_bkops - force enable of auto bkops + * ufshcd_force_reset_auto_bkops - force reset auto bkops state * @hba: per adapter instance * * After a device reset the device may toggle the BKOPS_EN flag * to default value. The s/w tracking variables should be updated - * as well. Do this by forcing enable of auto bkops. + * as well. This function would change the auto-bkops state based on + * UFSHCD_CAP_KEEP_AUTO_BKOPS_ENABLED_EXCEPT_SUSPEND. */ -static void ufshcd_force_reset_auto_bkops(struct ufs_hba *hba) +static void ufshcd_force_reset_auto_bkops(struct ufs_hba *hba) { - hba->auto_bkops_enabled = false; - hba->ee_ctrl_mask |= MASK_EE_URGENT_BKOPS; - ufshcd_enable_auto_bkops(hba); + if (ufshcd_keep_autobkops_enabled_except_suspend(hba)) { + hba->auto_bkops_enabled = false; + hba->ee_ctrl_mask |= MASK_EE_URGENT_BKOPS; + ufshcd_enable_auto_bkops(hba); + } else { + hba->auto_bkops_enabled = true; + hba->ee_ctrl_mask &= ~MASK_EE_URGENT_BKOPS; + ufshcd_disable_auto_bkops(hba); + } } static inline int ufshcd_get_bkops_status(struct ufs_hba *hba, u32 *status) @@ -6138,11 +6145,15 @@ static int ufshcd_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) goto set_old_link_state; } - /* - * If BKOPs operations are urgently needed at this moment then - * keep auto-bkops enabled or else disable it. - */ - ufshcd_urgent_bkops(hba); + if (ufshcd_keep_autobkops_enabled_except_suspend(hba)) + ufshcd_enable_auto_bkops(hba); + else + /* + * If BKOPs operations are urgently needed at this moment then + * keep auto-bkops enabled or else disable it. + */ + ufshcd_urgent_bkops(hba); + hba->clk_gating.is_suspended = false; if (ufshcd_is_clkscaling_enabled(hba)) diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index 04509827fe64..f2170d5058a8 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -548,6 +548,14 @@ struct ufs_hba { * CAUTION: Enabling this might reduce overall UFS throughput. */ #define UFSHCD_CAP_INTR_AGGR (1 << 4) + /* + * This capability allows the device auto-bkops to be always enabled + * except during suspend (both runtime and suspend). + * Enabling this capability means that device will always be allowed + * to do background operation when it's active but it might degrade + * the performance of ongoing read/write operations. + */ +#define UFSHCD_CAP_KEEP_AUTO_BKOPS_ENABLED_EXCEPT_SUSPEND (1 << 5) struct devfreq *devfreq; struct ufs_clk_scaling clk_scaling; @@ -645,6 +653,11 @@ static inline void *ufshcd_get_variant(struct ufs_hba *hba) BUG_ON(!hba); return hba->priv; } +static inline bool ufshcd_keep_autobkops_enabled_except_suspend( + struct ufs_hba *hba) +{ + return hba->caps & UFSHCD_CAP_KEEP_AUTO_BKOPS_ENABLED_EXCEPT_SUSPEND; +} extern int ufshcd_runtime_suspend(struct ufs_hba *hba); extern int ufshcd_runtime_resume(struct ufs_hba *hba); |