scsi: lpfc: Change VMID registration to be based on fabric parameters

Currently, VMID registration is configured via module parameters.  This
could lead to VMID compatibility issues if two ports are connected to
different brands of switches, as the two brands implement VMID differently.

Make logical changes so that VMID registration is based on common service
parameters from FLOGI_ACC with fabric rather than module parameters.

Link: https://lore.kernel.org/r/20220506035519.50908-9-jsmart2021@gmail.com
Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

4 files changed, 14 insertions, 11 deletions

diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h
index 405c8a8dd795..f8f5b4a2d523 100644
--- a/drivers/scsi/lpfc/lpfc.h
+++ b/drivers/scsi/lpfc/lpfc.h
@@ -714,6 +714,7 @@ struct lpfc_vport {
 #define LPFC_VMID_QFPA_CMPL		0x4
 #define LPFC_VMID_QOS_ENABLED		0x8
 #define LPFC_VMID_TIMER_ENBLD		0x10
+#define LPFC_VMID_TYPE_PRIO		0x20
 	struct fc_qfpa_res *qfpa_res;
 
 	struct fc_vport *fc_vport;
diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index 3671e0f8e041..33fac4401e8f 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -1105,7 +1105,8 @@ stop_rr_fcf_flogi:
 			 sp->cmn.priority_tagging, kref_read(&ndlp->kref));
 
 	if (sp->cmn.priority_tagging)
-		vport->vmid_flag |= LPFC_VMID_ISSUE_QFPA;
+		vport->phba->pport->vmid_flag |= (LPFC_VMID_ISSUE_QFPA |
+						  LPFC_VMID_TYPE_PRIO);
 
 	if (vport->port_state == LPFC_FLOGI) {
 		/*
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index 1959c58d22f8..1d134a01ff3e 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -5344,9 +5344,9 @@ static void lpfc_vmid_update_entry(struct lpfc_vport *vport, struct scsi_cmnd
 {
 	u64 *lta;
 
-	if (vport->vmid_priority_tagging)
+	if (vport->phba->pport->vmid_flag & LPFC_VMID_TYPE_PRIO)
 		tag->cs_ctl_vmid = vmp->un.cs_ctl_vmid;
-	else
+	else if (vport->phba->cfg_vmid_app_header)
 		tag->app_id = vmp->un.app_id;
 
 	if (cmd->sc_data_direction == DMA_TO_DEVICE)
@@ -5391,11 +5391,12 @@ static int lpfc_vmid_get_appid(struct lpfc_vport *vport, char *uuid, struct
 			       scsi_cmnd * cmd, union lpfc_vmid_io_tag *tag)
 {
 	struct lpfc_vmid *vmp = NULL;
-	int hash, len, rc, i;
+	int hash, len, rc = -EPERM, i;
 
 	/* check if QFPA is complete */
-	if (lpfc_vmid_is_type_priority_tag(vport) && !(vport->vmid_flag &
-	      LPFC_VMID_QFPA_CMPL)) {
+	if (lpfc_vmid_is_type_priority_tag(vport) &&
+	    !(vport->vmid_flag & LPFC_VMID_QFPA_CMPL) &&
+	    (vport->vmid_flag & LPFC_VMID_ISSUE_QFPA)) {
 		vport->work_port_events |= WORKER_CHECK_VMID_ISSUE_QFPA;
 		return -EAGAIN;
 	}
@@ -5469,7 +5470,7 @@ static int lpfc_vmid_get_appid(struct lpfc_vport *vport, char *uuid, struct
 			vport->vmid_inactivity_timeout ? 1 : 0;
 
 		/* if type priority tag, get next available VMID */
-		if (lpfc_vmid_is_type_priority_tag(vport))
+		if (vport->phba->pport->vmid_flag & LPFC_VMID_TYPE_PRIO)
 			lpfc_vmid_assign_cs_ctl(vport, vmp);
 
 		/* allocate the per cpu variable for holding */
@@ -5488,9 +5489,9 @@ static int lpfc_vmid_get_appid(struct lpfc_vport *vport, char *uuid, struct
 		write_unlock(&vport->vmid_lock);
 
 		/* complete transaction with switch */
-		if (lpfc_vmid_is_type_priority_tag(vport))
+		if (vport->phba->pport->vmid_flag & LPFC_VMID_TYPE_PRIO)
 			rc = lpfc_vmid_uvem(vport, vmp, true);
-		else
+		else if (vport->phba->cfg_vmid_app_header)
 			rc = lpfc_vmid_cmd(vport, SLI_CTAS_RAPP_IDENT, vmp);
 		if (!rc) {
 			write_lock(&vport->vmid_lock);
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index 573526f08baf..79d2ef5f0f05 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -10377,11 +10377,11 @@ lpfc_prep_embed_io(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
 
 	/* add the VMID tags as per switch response */
 	if (unlikely(piocb->cmd_flag & LPFC_IO_VMID)) {
-		if (phba->pport->vmid_priority_tagging) {
+		if (phba->pport->vmid_flag & LPFC_VMID_TYPE_PRIO) {
 			bf_set(wqe_ccpe, &wqe->fcp_iwrite.wqe_com, 1);
 			bf_set(wqe_ccp, &wqe->fcp_iwrite.wqe_com,
 					(piocb->vmid_tag.cs_ctl_vmid));
-		} else {
+		} else if (phba->cfg_vmid_app_header) {
 			bf_set(wqe_appid, &wqe->fcp_iwrite.wqe_com, 1);
 			bf_set(wqe_wqes, &wqe->fcp_iwrite.wqe_com, 1);
 			wqe->words[31] = piocb->vmid_tag.app_id;