[SCSI] bfa: Clear LL_HALT and PSS_ERR bit when IOC crashes.

Clear LL_HALT and PSS_ERR bit in the interrupt status register on an IOC crash.

Signed-off-by: Krishna Gudipati <kgudipat@brocade.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

drivers/scsi/bfa/bfa_intr.c

@@ -197,17 +197,44 @@ bfa_msix_rspq(struct bfa_s *bfa, int rsp_qid)
 void
 bfa_msix_lpu_err(struct bfa_s *bfa, int vec)
 {
-	u32 intr;
+	u32 intr, curr_value;
 
 	intr = bfa_reg_read(bfa->iocfc.bfa_regs.intr_status);
 
 	if (intr & (__HFN_INT_MBOX_LPU0 | __HFN_INT_MBOX_LPU1))
 		bfa_msix_lpu(bfa);
 
-	if (intr & (__HFN_INT_ERR_EMC |
-		    __HFN_INT_ERR_LPU0 | __HFN_INT_ERR_LPU1 |
-		    __HFN_INT_ERR_PSS | __HFN_INT_LL_HALT))
+	intr &= (__HFN_INT_ERR_EMC | __HFN_INT_ERR_LPU0 |
+		__HFN_INT_ERR_LPU1 | __HFN_INT_ERR_PSS | __HFN_INT_LL_HALT);
+
+	if (intr) {
+		if (intr & __HFN_INT_LL_HALT) {
+			/**
+			 * If LL_HALT bit is set then FW Init Halt LL Port
+			 * Register needs to be cleared as well so Interrupt
+			 * Status Register will be cleared.
+			 */
+			curr_value = bfa_reg_read(bfa->ioc.ioc_regs.ll_halt);
+			curr_value &= ~__FW_INIT_HALT_P;
+			bfa_reg_write(bfa->ioc.ioc_regs.ll_halt, curr_value);
+		}
+
+		if (intr & __HFN_INT_ERR_PSS) {
+			/**
+			 * ERR_PSS bit needs to be cleared as well in case
+			 * interrups are shared so driver's interrupt handler is
+			 * still called eventhough it is already masked out.
+			 */
+			curr_value = bfa_reg_read(
+				bfa->ioc.ioc_regs.pss_err_status_reg);
+			curr_value &= __PSS_ERR_STATUS_SET;
+			bfa_reg_write(bfa->ioc.ioc_regs.pss_err_status_reg,
+				curr_value);
+		}
+
+		bfa_reg_write(bfa->iocfc.bfa_regs.intr_status, intr);
 		bfa_msix_errint(bfa, intr);
+	}
 }
 
 void

drivers/scsi/bfa/bfa_ioc.h

@@ -74,6 +74,7 @@ struct bfa_ioc_regs_s {
 	bfa_os_addr_t   lpu_mbox_cmd;
 	bfa_os_addr_t   lpu_mbox;
 	bfa_os_addr_t   pss_ctl_reg;
+	bfa_os_addr_t   pss_err_status_reg;
 	bfa_os_addr_t   app_pll_fast_ctl_reg;
 	bfa_os_addr_t   app_pll_slow_ctl_reg;
 	bfa_os_addr_t   ioc_sem_reg;

drivers/scsi/bfa/bfa_ioc_cb.c

@@ -145,6 +145,7 @@ bfa_ioc_cb_reg_init(struct bfa_ioc_s *ioc)
 	 * PSS control registers
 	 */
 	ioc->ioc_regs.pss_ctl_reg = (rb + PSS_CTL_REG);
+	ioc->ioc_regs.pss_err_status_reg = (rb + PSS_ERR_STATUS_REG);
 	ioc->ioc_regs.app_pll_fast_ctl_reg = (rb + APP_PLL_400_CTL_REG);
 	ioc->ioc_regs.app_pll_slow_ctl_reg = (rb + APP_PLL_212_CTL_REG);
 

drivers/scsi/bfa/bfa_ioc_ct.c

@@ -237,6 +237,7 @@ bfa_ioc_ct_reg_init(struct bfa_ioc_s *ioc)
 	 * PSS control registers
 	 */
 	ioc->ioc_regs.pss_ctl_reg = (rb + PSS_CTL_REG);
+	ioc->ioc_regs.pss_err_status_reg = (rb + PSS_ERR_STATUS_REG);
 	ioc->ioc_regs.app_pll_fast_ctl_reg = (rb + APP_PLL_425_CTL_REG);
 	ioc->ioc_regs.app_pll_slow_ctl_reg = (rb + APP_PLL_312_CTL_REG);
 

drivers/scsi/bfa/include/bfi/bfi_cbreg.h

@@ -177,6 +177,19 @@
 #define __PSS_LMEM_INIT_EN               0x00000100
 #define __PSS_LPU1_RESET                 0x00000002
 #define __PSS_LPU0_RESET                 0x00000001
+#define PSS_ERR_STATUS_REG		 0x00018810
+#define __PSS_LMEM1_CORR_ERR		 0x00000800
+#define __PSS_LMEM0_CORR_ERR             0x00000400
+#define __PSS_LMEM1_UNCORR_ERR           0x00000200
+#define __PSS_LMEM0_UNCORR_ERR           0x00000100
+#define __PSS_BAL_PERR                   0x00000080
+#define __PSS_DIP_IF_ERR                 0x00000040
+#define __PSS_IOH_IF_ERR                 0x00000020
+#define __PSS_TDS_IF_ERR                 0x00000010
+#define __PSS_RDS_IF_ERR                 0x00000008
+#define __PSS_SGM_IF_ERR                 0x00000004
+#define __PSS_LPU1_RAM_ERR               0x00000002
+#define __PSS_LPU0_RAM_ERR               0x00000001
 #define ERR_SET_REG			 0x00018818
 #define __PSS_ERR_STATUS_SET		 0x00000fff
 

drivers/scsi/bfa/include/bfi/bfi_ctreg.h

@@ -430,6 +430,29 @@ enum {
 #define __PSS_LMEM_INIT_EN               0x00000100
 #define __PSS_LPU1_RESET                 0x00000002
 #define __PSS_LPU0_RESET                 0x00000001
+#define PSS_ERR_STATUS_REG               0x00018810
+#define __PSS_LPU1_TCM_READ_ERR          0x00200000
+#define __PSS_LPU0_TCM_READ_ERR          0x00100000
+#define __PSS_LMEM5_CORR_ERR             0x00080000
+#define __PSS_LMEM4_CORR_ERR             0x00040000
+#define __PSS_LMEM3_CORR_ERR             0x00020000
+#define __PSS_LMEM2_CORR_ERR             0x00010000
+#define __PSS_LMEM1_CORR_ERR             0x00008000
+#define __PSS_LMEM0_CORR_ERR             0x00004000
+#define __PSS_LMEM5_UNCORR_ERR           0x00002000
+#define __PSS_LMEM4_UNCORR_ERR           0x00001000
+#define __PSS_LMEM3_UNCORR_ERR           0x00000800
+#define __PSS_LMEM2_UNCORR_ERR           0x00000400
+#define __PSS_LMEM1_UNCORR_ERR           0x00000200
+#define __PSS_LMEM0_UNCORR_ERR           0x00000100
+#define __PSS_BAL_PERR                   0x00000080
+#define __PSS_DIP_IF_ERR                 0x00000040
+#define __PSS_IOH_IF_ERR                 0x00000020
+#define __PSS_TDS_IF_ERR                 0x00000010
+#define __PSS_RDS_IF_ERR                 0x00000008
+#define __PSS_SGM_IF_ERR                 0x00000004
+#define __PSS_LPU1_RAM_ERR               0x00000002
+#define __PSS_LPU0_RAM_ERR               0x00000001
 #define ERR_SET_REG			 0x00018818
 #define __PSS_ERR_STATUS_SET		 0x003fffff
 #define HQM_QSET0_RXQ_DRBL_P0            0x00038000