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scsi: lpfc: Introduce FC_RSCN_MEMENTO flag for tracking post RSCN completion

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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>
This commit is contained in:
James Smart 2022-04-12 15:20:01 -07:00 committed by Martin K. Petersen
parent 6c983d327b
commit 1045592fc9
3 changed files with 9 additions and 3 deletions
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1
drivers/scsi/lpfc/lpfc.h
View File

@ -604,6 +604,7 @@ 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 */

8
drivers/scsi/lpfc/lpfc_els.c
View File

@ -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 *vport, struct lpfc_nodelist *ndlp,
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 *vport, struct lpfc_iocbq *cmdiocb,
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 *vport, struct lpfc_iocbq *cmdiocb,
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 */

3
drivers/scsi/lpfc/lpfc_hbadisc.c
View File

@ -1343,7 +1343,8 @@ lpfc_linkup_port(struct lpfc_vport *vport)
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);