From: James Smart <jsmart2021@gmail.com>
Date: Tue, 12 Apr 2022 15:20:01 -0700
Subject: scsi: lpfc: Introduce FC_RSCN_MEMENTO flag for tracking post RSCN
completion
Patch-mainline: v5.19-rc1
Git-commit: 1045592fc968fe1e4b360b3bce2e9b522f173cdc
References: bsc#1200045
During an NVMe target reboot, the target may initialize itself as FCP only
during the first RSCN and shortly after trigger a second RSCN claiming NVMe
support. The timing of these RSCNs occur before FCP-PRLI for the first
RSCN completes leading discovery issues over NVMe.
Change RSCN and NVME-PRLI send logic based on a new FC_RSCN_MEMENTO flag
that signals when lpfc_end_rscn() is completed and serves as a memento that
discovery was started from RSCN.
Link: https://lore.kernel.org/r/20220412222008.126521-20-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>
Acked-by: Daniel Wagner <dwagner@suse.de>
---
drivers/scsi/lpfc/lpfc.h | 1 +
drivers/scsi/lpfc/lpfc_els.c | 8 ++++++--
drivers/scsi/lpfc/lpfc_hbadisc.c | 3 ++-
3 files changed, 9 insertions(+), 3 deletions(-)
--- a/drivers/scsi/lpfc/lpfc.h
+++ b/drivers/scsi/lpfc/lpfc.h
@@ -603,6 +603,7 @@ struct lpfc_vport {
#define FC_VFI_REGISTERED 0x800000 /* VFI is registered */
#define FC_FDISC_COMPLETED 0x1000000/* FDISC completed */
#define FC_DISC_DELAYED 0x2000000/* Delay NPort discovery */
+#define FC_RSCN_MEMENTO 0x4000000/* RSCN cmd processed */
uint32_t ct_flags;
#define FC_CT_RFF_ID 0x1 /* RFF_ID accepted by switch */
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -1896,6 +1896,7 @@ lpfc_end_rscn(struct lpfc_vport *vport)
else {
spin_lock_irq(shost->host_lock);
vport->fc_flag &= ~FC_RSCN_MODE;
+ vport->fc_flag |= FC_RSCN_MEMENTO;
spin_unlock_irq(shost->host_lock);
}
}
@@ -2444,13 +2445,14 @@ lpfc_issue_els_prli(struct lpfc_vport *v
u32 local_nlp_type, elscmd;
/*
- * If we are in RSCN mode, the FC4 types supported from a
+ * If discovery was kicked off from RSCN mode,
+ * the FC4 types supported from a
* previous GFT_ID command may not be accurate. So, if we
* are a NVME Initiator, always look for the possibility of
* the remote NPort beng a NVME Target.
*/
if (phba->sli_rev == LPFC_SLI_REV4 &&
- vport->fc_flag & FC_RSCN_MODE &&
+ vport->fc_flag & (FC_RSCN_MODE | FC_RSCN_MEMENTO) &&
vport->nvmei_support)
ndlp->nlp_fc4_type |= NLP_FC4_NVME;
local_nlp_type = ndlp->nlp_fc4_type;
@@ -7988,6 +7990,7 @@ lpfc_els_rcv_rscn(struct lpfc_vport *vpo
if ((rscn_cnt < FC_MAX_HOLD_RSCN) &&
!(vport->fc_flag & FC_RSCN_DISCOVERY)) {
vport->fc_flag |= FC_RSCN_MODE;
+ vport->fc_flag &= ~FC_RSCN_MEMENTO;
spin_unlock_irq(shost->host_lock);
if (rscn_cnt) {
cmd = vport->fc_rscn_id_list[rscn_cnt-1]->virt;
@@ -8037,6 +8040,7 @@ lpfc_els_rcv_rscn(struct lpfc_vport *vpo
spin_lock_irq(shost->host_lock);
vport->fc_flag |= FC_RSCN_MODE;
+ vport->fc_flag &= ~FC_RSCN_MEMENTO;
spin_unlock_irq(shost->host_lock);
vport->fc_rscn_id_list[vport->fc_rscn_id_cnt++] = pcmd;
/* Indicate we are done walking fc_rscn_id_list on this vport */
--- a/drivers/scsi/lpfc/lpfc_hbadisc.c
+++ b/drivers/scsi/lpfc/lpfc_hbadisc.c
@@ -1343,7 +1343,8 @@ lpfc_linkup_port(struct lpfc_vport *vpor
spin_lock_irq(shost->host_lock);
vport->fc_flag &= ~(FC_PT2PT | FC_PT2PT_PLOGI | FC_ABORT_DISCOVERY |
- FC_RSCN_MODE | FC_NLP_MORE | FC_RSCN_DISCOVERY);
+ FC_RSCN_MEMENTO | FC_RSCN_MODE |
+ FC_NLP_MORE | FC_RSCN_DISCOVERY);
vport->fc_flag |= FC_NDISC_ACTIVE;
vport->fc_ns_retry = 0;
spin_unlock_irq(shost->host_lock);