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| author | Subhash Jadavani <subhashj@codeaurora.org> | 2014-09-25 15:32:35 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2014-10-01 13:11:26 +0200 |
| commit | 374a246e4ebda1fc55d537877bf2412e511ecc7b (patch) | |
| tree | 548b471cadaaa8580276d2725bbafb55fae80b6e /drivers/scsi/ufs/ufshcd.h | |
| parent | 856b348305c98d4e0c8e5eafa97c61443197f8d3 (diff) | |
| download | linux-374a246e4ebda1fc55d537877bf2412e511ecc7b.tar.gz linux-374a246e4ebda1fc55d537877bf2412e511ecc7b.tar.bz2 linux-374a246e4ebda1fc55d537877bf2412e511ecc7b.zip | |
ufs: tune bkops while power managment events
Add capability to control the auto bkops during suspend.
If host explicitly enables the auto bkops (background operation) on device
then only device would perform the bkops on its own. If auto bkops is not
enabled explicitly and if the device reaches to state where it must do
background operation, device would raise the urgent bkops exception event
to host and then host will enable the auto bkops on device. This patch
adds the option to choose whether auto bkops should be enabled during
runtime suspend or not. Since we don't want to keep the device active to
perform the non critical bkops, host will enable urgent bkops only.
Keep auto-bkops enabled after resume if urgent bkops needed.
If device bkops status shows that its in critical need of executing
background operations, host should allow the device to continue doing
background operations.
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Dolev Raviv <draviv@codeaurora.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/scsi/ufs/ufshcd.h')
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index 908db3eb0609..d7fec869d590 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -469,6 +469,8 @@ struct ufs_hba { #define UFSHCD_CAP_HIBERN8_WITH_CLK_GATING (1 << 1) /* Allow dynamic clk scaling */ #define UFSHCD_CAP_CLK_SCALING (1 << 2) + /* Allow auto bkops to enabled during runtime suspend */ +#define UFSHCD_CAP_AUTO_BKOPS_SUSPEND (1 << 3) struct devfreq *devfreq; struct ufs_clk_scaling clk_scaling; @@ -487,6 +489,11 @@ static inline int ufshcd_is_clkscaling_enabled(struct ufs_hba *hba) { return hba->caps & UFSHCD_CAP_CLK_SCALING; } +static inline bool ufshcd_can_autobkops_during_suspend(struct ufs_hba *hba) +{ + return hba->caps & UFSHCD_CAP_AUTO_BKOPS_SUSPEND; +} + #define ufshcd_writel(hba, val, reg) \ writel((val), (hba)->mmio_base + (reg)) #define ufshcd_readl(hba, reg) \ |