[SCSI] qla2xxx: Disable generating pause frames when firmware hang detected for ISP82xx.

Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

drivers/scsi/qla2xxx/qla_dbg.c

@@ -12,7 +12,7 @@
  * |             Level            |   Last Value Used  |     Holes	|
  * ----------------------------------------------------------------------
  * | Module Init and Probe        |       0x0116       |  		|
- * | Mailbox commands             |       0x1129       |		|
+ * | Mailbox commands             |       0x112b       |		|
  * | Device Discovery             |       0x2083       |		|
  * | Queue Command and IO tracing |       0x302e       |     0x3008     |
  * | DPC Thread                   |       0x401c       |		|

drivers/scsi/qla2xxx/qla_mbx.c

@@ -303,7 +303,15 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
 			if (!test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) &&
 			    !test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags) &&
 			    !test_bit(ISP_ABORT_RETRY, &vha->dpc_flags)) {
-
+				if (IS_QLA82XX(ha)) {
+					ql_dbg(ql_dbg_mbx, vha, 0x112a,
+					    "disabling pause transmit on port "
+					    "0 & 1.\n");
+					qla82xx_wr_32(ha,
+					    QLA82XX_CRB_NIU + 0x98,
+					    CRB_NIU_XG_PAUSE_CTL_P0|
+					    CRB_NIU_XG_PAUSE_CTL_P1);
+				}
 				ql_log(ql_log_info, base_vha, 0x101c,
 				    "Mailbox cmd timeout occured. "
 				    "Scheduling ISP abort eeh_busy=0x%x.\n",
@@ -319,7 +327,15 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
 			if (!test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) &&
 			    !test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags) &&
 			    !test_bit(ISP_ABORT_RETRY, &vha->dpc_flags)) {
-
+				if (IS_QLA82XX(ha)) {
+					ql_dbg(ql_dbg_mbx, vha, 0x112b,
+					    "disabling pause transmit on port "
+					    "0 & 1.\n");
+					qla82xx_wr_32(ha,
+					    QLA82XX_CRB_NIU + 0x98,
+					    CRB_NIU_XG_PAUSE_CTL_P0|
+					    CRB_NIU_XG_PAUSE_CTL_P1);
+				}
 				ql_log(ql_log_info, base_vha, 0x101e,
 				    "Mailbox cmd timeout occured. "
 				    "Scheduling ISP abort.\n");

drivers/scsi/qla2xxx/qla_nx.c

@@ -3853,9 +3853,13 @@ void qla82xx_watchdog(scsi_qla_host_t *vha)
 			qla2xxx_wake_dpc(vha);
 		} else {
 			if (qla82xx_check_fw_alive(vha)) {
+				ql_dbg(ql_dbg_timer, vha, 0x6011,
+				    "disabling pause transmit on port 0 & 1.\n");
+				qla82xx_wr_32(ha, QLA82XX_CRB_NIU + 0x98,
+				    CRB_NIU_XG_PAUSE_CTL_P0|CRB_NIU_XG_PAUSE_CTL_P1);
 				halt_status = qla82xx_rd_32(ha,
 				    QLA82XX_PEG_HALT_STATUS1);
-				ql_dbg(ql_dbg_timer, vha, 0x6005,
+				ql_log(ql_log_info, vha, 0x6005,
 				    "dumping hw/fw registers:.\n "
 				    " PEG_HALT_STATUS1: 0x%x, PEG_HALT_STATUS2: 0x%x,.\n "
 				    " PEG_NET_0_PC: 0x%x, PEG_NET_1_PC: 0x%x,.\n "

drivers/scsi/qla2xxx/qla_nx.h

@@ -1173,4 +1173,8 @@ struct qla82xx_md_entry_queue {
 
 static const int MD_MIU_TEST_AGT_RDDATA[] = { 0x410000A8, 0x410000AC,
 	0x410000B8, 0x410000BC };
+
+#define CRB_NIU_XG_PAUSE_CTL_P0        0x1
+#define CRB_NIU_XG_PAUSE_CTL_P1        0x8
+
 #endif