[SCSI] mvsas: Add support for Non specific NCQ error interrupt

Signed-off-by: Xiangliang Yu <yuxiangl@marvell.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

6 files changed, 52 insertions, 1 deletions

diff --git a/drivers/scsi/mvsas/mv_64xx.c b/drivers/scsi/mvsas/mv_64xx.c
index 13c960481391..0e13e6441da7 100644
--- a/drivers/scsi/mvsas/mv_64xx.c
+++ b/drivers/scsi/mvsas/mv_64xx.c
@@ -811,5 +811,6 @@ const struct mvs_dispatch mvs_64xx_dispatch = {
 #ifndef DISABLE_HOTPLUG_DMA_FIX
         mvs_64xx_fix_dma,
 #endif
+        NULL,
 };
 
diff --git a/drivers/scsi/mvsas/mv_94xx.c b/drivers/scsi/mvsas/mv_94xx.c
index 78162c3c36e6..9d60c7c19b32 100644
--- a/drivers/scsi/mvsas/mv_94xx.c
+++ b/drivers/scsi/mvsas/mv_94xx.c
@@ -249,7 +249,7 @@ static int __devinit mvs_94xx_init(struct mvs_info *mvi)
 
         /* enable completion queue interrupt */
         tmp = (CINT_PORT_MASK | CINT_DONE | CINT_MEM | CINT_SRS | CINT_CI_STOP |
-                CINT_DMA_PCIE);
+                CINT_DMA_PCIE | CINT_NON_SPEC_NCQ_ERROR);
         tmp |= CINT_PHY_MASK;
         mw32(MVS_INT_MASK, tmp);
 
@@ -367,6 +367,35 @@ static void mvs_94xx_issue_stop(struct mvs_info *mvi, enum mvs_port_type type,
         mw32(MVS_PCS, tmp);
 }
 
+static void mvs_94xx_non_spec_ncq_error(struct mvs_info *mvi)
+{
+        void __iomem *regs = mvi->regs;
+        u32 err_0, err_1;
+        u8 i;
+        struct mvs_device *device;
+
+        err_0 = mr32(MVS_NON_NCQ_ERR_0);
+        err_1 = mr32(MVS_NON_NCQ_ERR_1);
+
+        mv_dprintk("non specific ncq error err_0:%x,err_1:%x.\n",
+                        err_0, err_1);
+        for (i = 0; i < 32; i++) {
+                if (err_0 & bit(i)) {
+                        device = mvs_find_dev_by_reg_set(mvi, i);
+                        if (device)
+                                mvs_release_task(mvi, device->sas_device);
+                }
+                if (err_1 & bit(i)) {
+                        device = mvs_find_dev_by_reg_set(mvi, i+32);
+                        if (device)
+                                mvs_release_task(mvi, device->sas_device);
+                }
+        }
+
+        mw32(MVS_NON_NCQ_ERR_0, err_0);
+        mw32(MVS_NON_NCQ_ERR_1, err_1);
+}
+
 static void mvs_94xx_free_reg_set(struct mvs_info *mvi, u8 *tfs)
 {
         void __iomem *regs = mvi->regs;
@@ -679,5 +708,6 @@ const struct mvs_dispatch mvs_94xx_dispatch = {
 #ifndef DISABLE_HOTPLUG_DMA_FIX
         mvs_94xx_fix_dma,
 #endif
+        mvs_94xx_non_spec_ncq_error,
 };
 
diff --git a/drivers/scsi/mvsas/mv_chips.h b/drivers/scsi/mvsas/mv_chips.h
index 1753a6fc42d0..4519f809a8df 100644
--- a/drivers/scsi/mvsas/mv_chips.h
+++ b/drivers/scsi/mvsas/mv_chips.h
@@ -223,6 +223,9 @@ static inline void mvs_int_full(struct mvs_info *mvi)
                         mvs_int_port(mvi, i, tmp);
         }
 
+        if (stat & CINT_NON_SPEC_NCQ_ERROR)
+                MVS_CHIP_DISP->non_spec_ncq_error(mvi);
+
         if (stat & CINT_SRS)
                 mvs_int_sata(mvi);
 
diff --git a/drivers/scsi/mvsas/mv_defs.h b/drivers/scsi/mvsas/mv_defs.h
index bc00c940743c..9202bc68801d 100644
--- a/drivers/scsi/mvsas/mv_defs.h
+++ b/drivers/scsi/mvsas/mv_defs.h
@@ -144,6 +144,7 @@ enum hw_register_bits {
         CINT_DMA_PCIE           = (1U << 27),   /* DMA to PCIE timeout */
         CINT_MEM                = (1U << 26),   /* int mem parity err */
         CINT_I2C_SLAVE          = (1U << 25),   /* slave I2C event */
+        CINT_NON_SPEC_NCQ_ERROR = (1U << 25),   /* Non specific NCQ error */
         CINT_SRS                = (1U << 3),    /* SRS event */
         CINT_CI_STOP            = (1U << 1),    /* cmd issue stopped */
         CINT_DONE               = (1U << 0),    /* cmd completion */
diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c
index 0ef27425c447..aaa475a3eda6 100644
--- a/drivers/scsi/mvsas/mv_sas.c
+++ b/drivers/scsi/mvsas/mv_sas.c
@@ -253,6 +253,20 @@ int mvs_find_dev_phyno(struct domain_device *dev, int *phyno)
         return num;
 }
 
+struct mvs_device *mvs_find_dev_by_reg_set(struct mvs_info *mvi,
+                                                u8 reg_set)
+{
+        u32 dev_no;
+        for (dev_no = 0; dev_no < MVS_MAX_DEVICES; dev_no++) {
+                if (mvi->devices[dev_no].taskfileset == MVS_ID_NOT_MAPPED)
+                        continue;
+
+                if (mvi->devices[dev_no].taskfileset == reg_set)
+                        return &mvi->devices[dev_no];
+        }
+        return NULL;
+}
+
 static inline void mvs_free_reg_set(struct mvs_info *mvi,
                                 struct mvs_device *dev)
 {
diff --git a/drivers/scsi/mvsas/mv_sas.h b/drivers/scsi/mvsas/mv_sas.h
index 1367d8b9350d..f96100d7aee1 100644
--- a/drivers/scsi/mvsas/mv_sas.h
+++ b/drivers/scsi/mvsas/mv_sas.h
@@ -170,6 +170,7 @@ struct mvs_dispatch {
 #ifndef DISABLE_HOTPLUG_DMA_FIX
         void (*dma_fix)(dma_addr_t buf_dma, int buf_len, int from, void *prd);
 #endif
+        void (*non_spec_ncq_error)(struct mvs_info *mvi);
 
 };
 
@@ -416,5 +417,6 @@ void mvs_int_port(struct mvs_info *mvi, int phy_no, u32 events);
 void mvs_update_phyinfo(struct mvs_info *mvi, int i, int get_st);
 int mvs_int_rx(struct mvs_info *mvi, bool self_clear);
 void mvs_hexdump(u32 size, u8 *data, u32 baseaddr);
+struct mvs_device *mvs_find_dev_by_reg_set(struct mvs_info *mvi, u8 reg_set);
 #endif