scsi: qla2xxx: Migrate switch registration commands away from mailbox interface

Migrate switch registration commands: RFTID, RFFID, RNNID and RSNN_NN
out of mailbox interface to reduce fabric scan bottle neck.
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

@@ -535,6 +535,7 @@ typedef struct srb {
 	u32 gen1;	/* scratch */
 	u32 gen2;	/* scratch */
 	int rc;
+	int retry_count;
 	struct completion comp;
 	union {
 		struct srb_iocb iocb_cmd;
@@ -3187,7 +3188,7 @@ enum qla_work_type {
 	QLA_EVT_AENFX,
 	QLA_EVT_GIDPN,
 	QLA_EVT_GPNID,
-	QLA_EVT_GPNID_DONE,
+	QLA_EVT_UNMAP,
 	QLA_EVT_NEW_SESS,
 	QLA_EVT_GPDB,
 	QLA_EVT_PRLI,
@@ -3203,6 +3204,7 @@ enum qla_work_type {
 	QLA_EVT_GNNFT_DONE,
 	QLA_EVT_GNNID,
 	QLA_EVT_GFPNID,
+	QLA_EVT_SP_RETRY,
 };
 
 

drivers/scsi/qla2xxx/qla_gbl.h

@@ -650,7 +650,6 @@ extern void qla2x00_free_fcport(fc_port_t *);
 
 extern int qla24xx_post_gpnid_work(struct scsi_qla_host *, port_id_t *);
 extern int qla24xx_async_gpnid(scsi_qla_host_t *, port_id_t *);
-void qla24xx_async_gpnid_done(scsi_qla_host_t *, srb_t*);
 void qla24xx_handle_gpnid_event(scsi_qla_host_t *, struct event_arg *);
 
 int qla24xx_post_gpsc_work(struct scsi_qla_host *, fc_port_t *);
@@ -668,6 +667,7 @@ int qla24xx_post_gnnid_work(struct scsi_qla_host *, fc_port_t *);
 int qla24xx_post_gfpnid_work(struct scsi_qla_host *, fc_port_t *);
 int qla24xx_async_gfpnid(scsi_qla_host_t *, fc_port_t *);
 void qla24xx_handle_gfpnid_event(scsi_qla_host_t *, struct event_arg *);
+void qla24xx_sp_unmap(scsi_qla_host_t *, srb_t *);
 
 /*
  * Global Function Prototypes in qla_attr.c source file.

drivers/scsi/qla2xxx/qla_os.c

@@ -4918,6 +4918,20 @@ void qla24xx_create_new_sess(struct scsi_qla_host *vha, struct qla_work_evt *e)
 	}
 }
 
+static void qla_sp_retry(struct scsi_qla_host *vha, struct qla_work_evt *e)
+{
+	struct srb *sp = e->u.iosb.sp;
+	int rval;
+
+	rval = qla2x00_start_sp(sp);
+	if (rval != QLA_SUCCESS) {
+		ql_dbg(ql_dbg_disc, vha, 0x2043,
+		    "%s: %s: Re-issue IOCB failed (%d).\n",
+		    __func__, sp->name, rval);
+		qla24xx_sp_unmap(vha, sp);
+	}
+}
+
 void
 qla2x00_do_work(struct scsi_qla_host *vha)
 {
@@ -4971,8 +4985,8 @@ qla2x00_do_work(struct scsi_qla_host *vha)
 		case QLA_EVT_GPNID:
 			qla24xx_async_gpnid(vha, &e->u.gpnid.id);
 			break;
-		case QLA_EVT_GPNID_DONE:
-			qla24xx_async_gpnid_done(vha, e->u.iosb.sp);
+		case QLA_EVT_UNMAP:
+			qla24xx_sp_unmap(vha, e->u.iosb.sp);
 			break;
 		case QLA_EVT_RELOGIN:
 			qla2x00_relogin(vha);
@@ -5021,6 +5035,8 @@ qla2x00_do_work(struct scsi_qla_host *vha)
 		case QLA_EVT_GFPNID:
 			qla24xx_async_gfpnid(vha, e->u.fcport.fcport);
 			break;
+		case QLA_EVT_SP_RETRY:
+			qla_sp_retry(vha, e);
 		}
 		if (e->flags & QLA_EVT_FLAG_FREE)
 			kfree(e);

drivers/scsi/qla2xxx/qla_target.c

@@ -6619,18 +6619,21 @@ qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
 	qlt_add_target(ha, vha);
 }
 
-void
-qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
+u8
+qlt_rff_id(struct scsi_qla_host *vha)
 {
+	u8 fc4_feature = 0;
 	/*
 	 * FC-4 Feature bit 0 indicates target functionality to the name server.
 	 */
 	if (qla_tgt_mode_enabled(vha)) {
-		ct_req->req.rff_id.fc4_feature = BIT_0;
+		fc4_feature = BIT_0;
 	} else if (qla_ini_mode_enabled(vha)) {
-		ct_req->req.rff_id.fc4_feature = BIT_1;
+		fc4_feature = BIT_1;
 	} else if (qla_dual_mode_enabled(vha))
-		ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
+		fc4_feature = BIT_0 | BIT_1;
+
+	return fc4_feature;
 }
 
 /*

drivers/scsi/qla2xxx/qla_target.h

@@ -1072,7 +1072,7 @@ extern void qlt_free_cmd(struct qla_tgt_cmd *cmd);
 extern void qlt_async_event(uint16_t, struct scsi_qla_host *, uint16_t *);
 extern void qlt_enable_vha(struct scsi_qla_host *);
 extern void qlt_vport_create(struct scsi_qla_host *, struct qla_hw_data *);
-extern void qlt_rff_id(struct scsi_qla_host *, struct ct_sns_req *);
+extern u8 qlt_rff_id(struct scsi_qla_host *);
 extern void qlt_init_atio_q_entries(struct scsi_qla_host *);
 extern void qlt_24xx_process_atio_queue(struct scsi_qla_host *, uint8_t);
 extern void qlt_24xx_config_rings(struct scsi_qla_host *);