scsi: ufs: introduce the capability and quirk for interrupt aggregation

[karo-tx-linux.git] / drivers / scsi / ufs / ufshcd.h

diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index b47ff07698e80aa9119633568324e009da5217be..fc8bec9960b1dce97012f64cbcd37ceab000f9bf 100644 (file)
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -417,11 +417,15 @@ struct ufs_hba {
        unsigned int irq;
        bool is_irq_enabled;
 
+       /* Interrupt aggregation support is broken */
+       #define UFSHCD_QUIRK_BROKEN_INTR_AGGR                   UFS_BIT(0)
+
        /*
         * delay before each dme command is required as the unipro
         * layer has shown instabilities
         */
-       #define UFSHCD_QUIRK_DELAY_BEFORE_DME_CMDS              UFS_BIT(0)
+       #define UFSHCD_QUIRK_DELAY_BEFORE_DME_CMDS              UFS_BIT(1)
+
 
        unsigned int quirks;    /* Deviations from standard UFSHCI spec. */
 
@@ -478,6 +482,12 @@ struct ufs_hba {
 #define UFSHCD_CAP_CLK_SCALING (1 << 2)
        /* Allow auto bkops to enabled during runtime suspend */
 #define UFSHCD_CAP_AUTO_BKOPS_SUSPEND (1 << 3)
+       /*
+        * This capability allows host controller driver to use the UFS HCI's
+        * interrupt aggregation capability.
+        * CAUTION: Enabling this might reduce overall UFS throughput.
+        */
+#define UFSHCD_CAP_INTR_AGGR (1 << 4)
 
        struct devfreq *devfreq;
        struct ufs_clk_scaling clk_scaling;
@@ -502,6 +512,15 @@ 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_intr_aggr_allowed(struct ufs_hba *hba)
+{
+       if ((hba->caps & UFSHCD_CAP_INTR_AGGR) &&
+           !(hba->quirks & UFSHCD_QUIRK_BROKEN_INTR_AGGR))
+               return true;
+       else
+               return false;
+}
+
 #define ufshcd_writel(hba, val, reg)   \
        writel((val), (hba)->mmio_base + (reg))
 #define ufshcd_readl(hba, reg) \