[SCSI] lpfc 8.3.31: Correct point-to-point mode discovery errors on LPe16xxx

Signed-off-by: Alex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 77 insertions, 16 deletions

diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index 95cff9909eff..379397d17aca 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -230,27 +230,43 @@ lpfc_prep_els_iocb(struct lpfc_vport *vport, uint8_t expectRsp,
 
 	INIT_LIST_HEAD(&pbuflist->list);
 
-	icmd->un.elsreq64.bdl.addrHigh = putPaddrHigh(pbuflist->phys);
-	icmd->un.elsreq64.bdl.addrLow = putPaddrLow(pbuflist->phys);
-	icmd->un.elsreq64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
-	icmd->un.elsreq64.remoteID = did;	/* DID */
 	if (expectRsp) {
+		icmd->un.elsreq64.bdl.addrHigh = putPaddrHigh(pbuflist->phys);
+		icmd->un.elsreq64.bdl.addrLow = putPaddrLow(pbuflist->phys);
+		icmd->un.elsreq64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
 		icmd->un.elsreq64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
+
+		icmd->un.elsreq64.remoteID = did;		/* DID */
 		icmd->ulpCommand = CMD_ELS_REQUEST64_CR;
 		icmd->ulpTimeout = phba->fc_ratov * 2;
 	} else {
-		icmd->un.elsreq64.bdl.bdeSize = sizeof(struct ulp_bde64);
+		icmd->un.xseq64.bdl.addrHigh = putPaddrHigh(pbuflist->phys);
+		icmd->un.xseq64.bdl.addrLow = putPaddrLow(pbuflist->phys);
+		icmd->un.xseq64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
+		icmd->un.xseq64.bdl.bdeSize = sizeof(struct ulp_bde64);
+		icmd->un.xseq64.xmit_els_remoteID = did;	/* DID */
 		icmd->ulpCommand = CMD_XMIT_ELS_RSP64_CX;
 	}
 	icmd->ulpBdeCount = 1;
 	icmd->ulpLe = 1;
 	icmd->ulpClass = CLASS3;
 
-	if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) {
-		icmd->un.elsreq64.myID = vport->fc_myDID;
+	/*
+	 * If we have NPIV enabled, we want to send ELS traffic by VPI.
+	 * For SLI4, since the driver controls VPIs we also want to include
+	 * all ELS pt2pt protocol traffic as well.
+	 */
+	if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) ||
+		((phba->sli_rev == LPFC_SLI_REV4) &&
+		    (vport->fc_flag & FC_PT2PT))) {
+
+		if (expectRsp) {
+			icmd->un.elsreq64.myID = vport->fc_myDID;
+
+			/* For ELS_REQUEST64_CR, use the VPI by default */
+			icmd->ulpContext = phba->vpi_ids[vport->vpi];
+		}
 
-		/* For ELS_REQUEST64_CR, use the VPI by default */
-		icmd->ulpContext = phba->vpi_ids[vport->vpi];
 		icmd->ulpCt_h = 0;
 		/* The CT field must be 0=INVALID_RPI for the ECHO cmd */
 		if (elscmd == ELS_CMD_ECHO)
@@ -438,9 +454,10 @@ lpfc_issue_reg_vfi(struct lpfc_vport *vport)
 	int rc = 0;
 
 	sp = &phba->fc_fabparam;
-	/* move forward in case of SLI4 FC port loopback test */
+	/* move forward in case of SLI4 FC port loopback test and pt2pt mode */
 	if ((phba->sli_rev == LPFC_SLI_REV4) &&
-	    !(phba->link_flag & LS_LOOPBACK_MODE)) {
+	    !(phba->link_flag & LS_LOOPBACK_MODE) &&
+	    !(vport->fc_flag & FC_PT2PT)) {
 		ndlp = lpfc_findnode_did(vport, Fabric_DID);
 		if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
 			rc = -ENODEV;
@@ -820,6 +837,17 @@ lpfc_cmpl_els_flogi_nport(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 			mempool_free(mbox, phba->mbox_mem_pool);
 			goto fail;
 		}
+
+		/*
+		 * For SLI4, the VFI/VPI are registered AFTER the
+		 * Nport with the higher WWPN sends the PLOGI with
+		 * an assigned NPortId.
+		 */
+
+		/* not equal */
+		if ((phba->sli_rev == LPFC_SLI_REV4) && rc)
+			lpfc_issue_reg_vfi(vport);
+
 		/* Decrement ndlp reference count indicating that ndlp can be
 		 * safely released when other references to it are done.
 		 */
@@ -4940,8 +4968,6 @@ lpfc_els_rcv_flogi(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
 		return 1;
 	}
 
-	did = Fabric_DID;
-
 	if ((lpfc_check_sparm(vport, ndlp, sp, CLASS3, 1))) {
 		/* For a FLOGI we accept, then if our portname is greater
 		 * then the remote portname we initiate Nport login.
@@ -4980,29 +5006,64 @@ lpfc_els_rcv_flogi(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
 			spin_lock_irq(shost->host_lock);
 			vport->fc_flag |= FC_PT2PT_PLOGI;
 			spin_unlock_irq(shost->host_lock);
+
+			/* If we have the high WWPN we can assign our own
+			 * myDID; otherwise, we have to WAIT for a PLOGI
+			 * from the remote NPort to find out what it
+			 * will be.
+			 */
 			vport->fc_myDID = PT2PT_LocalID;
-		} else
-			vport->fc_myDID = PT2PT_RemoteID;
-		vport->port_state = LPFC_FLOGI;
+		}
+
+		/*
+		 * The vport state should go to LPFC_FLOGI only
+		 * AFTER we issue a FLOGI, not receive one.
+		 */
 		spin_lock_irq(shost->host_lock);
 		vport->fc_flag |= FC_PT2PT;
 		vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
 		spin_unlock_irq(shost->host_lock);
+
+		/*
+		 * We temporarily set fc_myDID to make it look like we are
+		 * a Fabric. This is done just so we end up with the right
+		 * did / sid on the FLOGI ACC rsp.
+		 */
+		did = vport->fc_myDID;
+		vport->fc_myDID = Fabric_DID;
+
 	} else {
 		/* Reject this request because invalid parameters */
 		stat.un.b.lsRjtRsvd0 = 0;
 		stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 		stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
 		stat.un.b.vendorUnique = 0;
+
+		/*
+		 * We temporarily set fc_myDID to make it look like we are
+		 * a Fabric. This is done just so we end up with the right
+		 * did / sid on the FLOGI LS_RJT rsp.
+		 */
+		did = vport->fc_myDID;
+		vport->fc_myDID = Fabric_DID;
+
 		lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 			NULL);
+
+		/* Now lets put fc_myDID back to what its supposed to be */
+		vport->fc_myDID = did;
+
 		return 1;
 	}
 
 	/* Send back ACC */
 	lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp, NULL);
 
+	/* Now lets put fc_myDID back to what its supposed to be */
+	vport->fc_myDID = did;
+
 	if (!(vport->fc_flag & FC_PT2PT_PLOGI)) {
+
 		mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 		if (!mbox)
 			goto fail;