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>

4 files changed, 76 insertions, 1 deletions

diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index 4127f35b669c..51b262b236b4 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/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"
 
diff --git a/drivers/scsi/qla2xxx/qla_gs.c b/drivers/scsi/qla2xxx/qla_gs.c
index 5acebaf57796..ef8e8891d54f 100644
--- a/drivers/scsi/qla2xxx/qla_gs.c
+++ b/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: "
diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index e4876f4220e4..4ea4aa5bddaa 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -1041,6 +1041,20 @@ void qla2x00_fcport_event_handler(scsi_qla_host_t *vha, struct event_arg *ea)
 
 	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))
 			return;
 
@@ -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;
 
diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index 2572121b765b..1eb46eb45005 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -973,6 +973,23 @@ skip_rio:
 			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)