scsi: qla2xxx: Fix name server relogin

Name server login is normally handle by FW. In some rare case where one
of the switches is being updated, name server login could get
affected. Trigger relogin to name server when driver detects this
condition.
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/qla_def.h

@@ -252,6 +252,8 @@
 #define NPH_F_PORT		0x7fe		/*  FFFFFE */
 #define NPH_IP_BROADCAST	0x7ff		/*  FFFFFF */
 
+#define NPH_SNS_LID(ha)	(IS_FWI2_CAPABLE(ha) ? NPH_SNS : SIMPLE_NAME_SERVER)
+
 #define MAX_CMDSZ	16		/* SCSI maximum CDB size. */
 #include "qla_fw.h"
 

drivers/scsi/qla2xxx/qla_gs.c

@@ -124,6 +124,7 @@ qla2x00_chk_ms_status(scsi_qla_host_t *vha, ms_iocb_entry_t *ms_pkt,
 	int rval;
 	uint16_t comp_status;
 	struct qla_hw_data *ha = vha->hw;
+	bool lid_is_sns = false;
 
 	rval = QLA_FUNCTION_FAILED;
 	if (ms_pkt->entry_status != 0) {
@@ -155,6 +156,25 @@ qla2x00_chk_ms_status(scsi_qla_host_t *vha, ms_iocb_entry_t *ms_pkt,
 			} else
 				rval = QLA_SUCCESS;
 			break;
+		case CS_PORT_LOGGED_OUT:
+			if (IS_FWI2_CAPABLE(ha)) {
+				if (le16_to_cpu(ms_pkt->loop_id.extended) ==
+				    NPH_SNS)
+					lid_is_sns = true;
+			} else {
+				if (le16_to_cpu(ms_pkt->loop_id.extended) ==
+				    SIMPLE_NAME_SERVER)
+					lid_is_sns = true;
+			}
+			if (lid_is_sns) {
+				ql_dbg(ql_dbg_async, vha, 0x502b,
+					"%s failed, Name server has logged out",
+					routine);
+				rval = QLA_NOT_LOGGED_IN;
+				set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
+				set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
+			}
+			break;
 		default:
 			ql_dbg(ql_dbg_disc, vha, 0x2033,
 			    "%s failed, completion status (%x) on port_id: "

drivers/scsi/qla2xxx/qla_init.c

@@ -1039,6 +1039,20 @@ void qla2x00_fcport_event_handler(scsi_qla_host_t *vha, struct event_arg *ea)
 	uint32_t id = 0, mask, rid;
 	int rc;
 
+	switch (ea->event) {
+	case FCME_RELOGIN:
+	case FCME_RSCN:
+	case FCME_GIDPN_DONE:
+	case FCME_GPSC_DONE:
+	case FCME_GPNID_DONE:
+		if (test_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags) ||
+		    test_bit(LOOP_RESYNC_ACTIVE, &vha->dpc_flags))
+			return;
+		break;
+	default:
+		break;
+	}
+
 	switch (ea->event) {
 	case FCME_RELOGIN:
 		if (test_bit(UNLOADING, &vha->dpc_flags))
@@ -4451,20 +4465,31 @@ qla2x00_configure_fabric(scsi_qla_host_t *vha)
 				/* EMPTY */
 				ql_dbg(ql_dbg_disc, vha, 0x2045,
 				    "Register FC-4 TYPE failed.\n");
+				if (test_bit(LOOP_RESYNC_NEEDED,
+				    &vha->dpc_flags))
+					break;
 			}
 			if (qla2x00_rff_id(vha)) {
 				/* EMPTY */
 				ql_dbg(ql_dbg_disc, vha, 0x2049,
 				    "Register FC-4 Features failed.\n");
+				if (test_bit(LOOP_RESYNC_NEEDED,
+				    &vha->dpc_flags))
+					break;
 			}
 			if (qla2x00_rnn_id(vha)) {
 				/* EMPTY */
 				ql_dbg(ql_dbg_disc, vha, 0x204f,
 				    "Register Node Name failed.\n");
+				if (test_bit(LOOP_RESYNC_NEEDED,
+				    &vha->dpc_flags))
+					break;
 			} else if (qla2x00_rsnn_nn(vha)) {
 				/* EMPTY */
 				ql_dbg(ql_dbg_disc, vha, 0x2053,
 				    "Register Symobilic Node Name failed.\n");
+				if (test_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags))
+					break;
 			}
 		}
 
@@ -4536,17 +4561,28 @@ qla2x00_find_all_fabric_devs(scsi_qla_host_t *vha)
 		memset(swl, 0, ha->max_fibre_devices * sizeof(sw_info_t));
 		if (qla2x00_gid_pt(vha, swl) != QLA_SUCCESS) {
 			swl = NULL;
+			if (test_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags))
+				return rval;
 		} else if (qla2x00_gpn_id(vha, swl) != QLA_SUCCESS) {
 			swl = NULL;
+			if (test_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags))
+				return rval;
 		} else if (qla2x00_gnn_id(vha, swl) != QLA_SUCCESS) {
 			swl = NULL;
+			if (test_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags))
+				return rval;
 		} else if (qla2x00_gfpn_id(vha, swl) != QLA_SUCCESS) {
 			swl = NULL;
+			if (test_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags))
+				return rval;
 		}
 
 		/* If other queries succeeded probe for FC-4 type */
-		if (swl)
+		if (swl) {
 			qla2x00_gff_id(vha, swl);
+			if (test_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags))
+				return rval;
+		}
 	}
 	swl_idx = 0;
 

drivers/scsi/qla2xxx/qla_isr.c

@@ -973,6 +973,23 @@ qla2x00_async_event(scsi_qla_host_t *vha, struct rsp_que *rsp, uint16_t *mb)
 			if (mb[1] == 0xffff)
 				goto global_port_update;
 
+			if (mb[1] == NPH_SNS_LID(ha)) {
+				set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
+				set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
+				break;
+			}
+
+			/* use handle_cnt for loop id/nport handle */
+			if (IS_FWI2_CAPABLE(ha))
+				handle_cnt = NPH_SNS;
+			else
+				handle_cnt = SIMPLE_NAME_SERVER;
+			if (mb[1] == handle_cnt) {
+				set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
+				set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
+				break;
+			}
+
 			/* Port logout */
 			fcport = qla2x00_find_fcport_by_loopid(vha, mb[1]);
 			if (!fcport)