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lpfc: add support to generate RSCN events for nport 

This patch adds general RSCN support:

 - The ability to transmit an RSCN to the port on the other end of
   the link (regular port if pt2pt, or fabric controller if fabric).
 - And general recognition of an RSCN ELS when an ELS is received.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Arun Easi <aeasi@marvell.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
James Smart 2019-05-14 14:58:05 -07:00 committed by Christoph Hellwig
parent 4cf7c363b4
commit f60cb93bbf
6 changed files with 163 additions and 0 deletions
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1
drivers/scsi/lpfc/lpfc.h
View File

@ -274,6 +274,7 @@ struct lpfc_stats {
uint32_t elsXmitADISC;
uint32_t elsXmitLOGO;
uint32_t elsXmitSCR;
uint32_t elsXmitRSCN;
uint32_t elsXmitRNID;
uint32_t elsXmitFARP;
uint32_t elsXmitFARPR;

2
drivers/scsi/lpfc/lpfc_crtn.h
View File

@ -141,6 +141,7 @@ int lpfc_issue_els_adisc(struct lpfc_vport *, struct lpfc_nodelist *, uint8_t);
int lpfc_issue_els_logo(struct lpfc_vport *, struct lpfc_nodelist *, uint8_t);
int lpfc_issue_els_npiv_logo(struct lpfc_vport *, struct lpfc_nodelist *);
int lpfc_issue_els_scr(struct lpfc_vport *, uint32_t, uint8_t);
int lpfc_issue_els_rscn(struct lpfc_vport *vport, uint8_t retry);
int lpfc_issue_fabric_reglogin(struct lpfc_vport *);
int lpfc_els_free_iocb(struct lpfc_hba *, struct lpfc_iocbq *);
int lpfc_ct_free_iocb(struct lpfc_hba *, struct lpfc_iocbq *);
@ -355,6 +356,7 @@ void lpfc_mbox_timeout_handler(struct lpfc_hba *);
struct lpfc_nodelist *lpfc_findnode_did(struct lpfc_vport *, uint32_t);
struct lpfc_nodelist *lpfc_findnode_wwpn(struct lpfc_vport *,
struct lpfc_name *);
struct lpfc_nodelist *lpfc_findnode_mapped(struct lpfc_vport *vport);
int lpfc_sli_issue_mbox_wait(struct lpfc_hba *, LPFC_MBOXQ_t *, uint32_t);

122
drivers/scsi/lpfc/lpfc_els.c
View File

@ -30,6 +30,8 @@
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport_fc.h>
#include <uapi/scsi/fc/fc_fs.h>
#include <uapi/scsi/fc/fc_els.h>
#include "lpfc_hw4.h"
#include "lpfc_hw.h"
@ -3078,6 +3080,116 @@ lpfc_issue_els_scr(struct lpfc_vport *vport, uint32_t nportid, uint8_t retry)
return 0;
}
/**
* lpfc_issue_els_rscn - Issue an RSCN to the Fabric Controller (Fabric)
* or the other nport (pt2pt).
* @vport: pointer to a host virtual N_Port data structure.
* @retry: number of retries to the command IOCB.
*
* This routine issues a RSCN to the Fabric Controller (DID 0xFFFFFD)
* when connected to a fabric, or to the remote port when connected
* in point-to-point mode. When sent to the Fabric Controller, it will
* replay the RSCN to registered recipients.
*
* Note that, in lpfc_prep_els_iocb() routine, the reference count of ndlp
* will be incremented by 1 for holding the ndlp and the reference to ndlp
* will be stored into the context1 field of the IOCB for the completion
* callback function to the RSCN ELS command.
*
* Return code
* 0 - Successfully issued RSCN command
* 1 - Failed to issue RSCN command
**/
int
lpfc_issue_els_rscn(struct lpfc_vport *vport, uint8_t retry)
{
struct lpfc_hba *phba = vport->phba;
struct lpfc_iocbq *elsiocb;
struct lpfc_nodelist *ndlp;
struct {
struct fc_els_rscn rscn;
struct fc_els_rscn_page portid;
} *event;
uint32_t nportid;
uint16_t cmdsize = sizeof(*event);
/* Not supported for private loop */
if (phba->fc_topology == LPFC_TOPOLOGY_LOOP &&
!(vport->fc_flag & FC_PUBLIC_LOOP))
return 1;
if (vport->fc_flag & FC_PT2PT) {
/* find any mapped nport - that would be the other nport */
ndlp = lpfc_findnode_mapped(vport);
if (!ndlp)
return 1;
} else {
nportid = FC_FID_FCTRL;
/* find the fabric controller node */
ndlp = lpfc_findnode_did(vport, nportid);
if (!ndlp) {
/* if one didn't exist, make one */
ndlp = lpfc_nlp_init(vport, nportid);
if (!ndlp)
return 1;
lpfc_enqueue_node(vport, ndlp);
} else if (!NLP_CHK_NODE_ACT(ndlp)) {
ndlp = lpfc_enable_node(vport, ndlp,
NLP_STE_UNUSED_NODE);
if (!ndlp)
return 1;
}
}
elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
ndlp->nlp_DID, ELS_CMD_RSCN_XMT);
if (!elsiocb) {
/* This will trigger the release of the node just
* allocated
*/
lpfc_nlp_put(ndlp);
return 1;
}
event = ((struct lpfc_dmabuf *)elsiocb->context2)->virt;
event->rscn.rscn_cmd = ELS_RSCN;
event->rscn.rscn_page_len = sizeof(struct fc_els_rscn_page);
event->rscn.rscn_plen = cpu_to_be16(cmdsize);
nportid = vport->fc_myDID;
/* appears that page flags must be 0 for fabric to broadcast RSCN */
event->portid.rscn_page_flags = 0;
event->portid.rscn_fid[0] = (nportid & 0x00FF0000) >> 16;
event->portid.rscn_fid[1] = (nportid & 0x0000FF00) >> 8;
event->portid.rscn_fid[2] = nportid & 0x000000FF;
lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
"Issue RSCN: did:x%x",
ndlp->nlp_DID, 0, 0);
phba->fc_stat.elsXmitRSCN++;
elsiocb->iocb_cmpl = lpfc_cmpl_els_cmd;
if (lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0) ==
IOCB_ERROR) {
/* The additional lpfc_nlp_put will cause the following
* lpfc_els_free_iocb routine to trigger the rlease of
* the node.
*/
lpfc_nlp_put(ndlp);
lpfc_els_free_iocb(phba, elsiocb);
return 1;
}
/* This will cause the callback-function lpfc_cmpl_els_cmd to
* trigger the release of node.
*/
if (!(vport->fc_flag & FC_PT2PT))
lpfc_nlp_put(ndlp);
return 0;
}
/**
* lpfc_issue_els_farpr - Issue a farp to an node on a vport
* @vport: pointer to a host virtual N_Port data structure.
@ -6318,6 +6430,16 @@ lpfc_els_rcv_rscn(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
fc_host_post_event(shost, fc_get_event_number(),
FCH_EVT_RSCN, lp[i]);
/* Check if RSCN is coming from a direct-connected remote NPort */
if (vport->fc_flag & FC_PT2PT) {
/* If so, just ACC it, no other action needed for now */
lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
"2024 pt2pt RSCN %08x Data: x%x x%x\n",
*lp, vport->fc_flag, payload_len);
lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
return 0;
}
/* If we are about to begin discovery, just ACC the RSCN.
* Discovery processing will satisfy it.
*/

35
drivers/scsi/lpfc/lpfc_hbadisc.c
View File

@ -5276,6 +5276,41 @@ lpfc_findnode_did(struct lpfc_vport *vport, uint32_t did)
return ndlp;
}
struct lpfc_nodelist *
lpfc_findnode_mapped(struct lpfc_vport *vport)
{
struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
struct lpfc_nodelist *ndlp;
uint32_t data1;
unsigned long iflags;
spin_lock_irqsave(shost->host_lock, iflags);
list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
if (ndlp->nlp_state == NLP_STE_UNMAPPED_NODE ||
ndlp->nlp_state == NLP_STE_MAPPED_NODE) {
data1 = (((uint32_t)ndlp->nlp_state << 24) |
((uint32_t)ndlp->nlp_xri << 16) |
((uint32_t)ndlp->nlp_type << 8) |
((uint32_t)ndlp->nlp_rpi & 0xff));
spin_unlock_irqrestore(shost->host_lock, iflags);
lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
"2025 FIND node DID "
"Data: x%p x%x x%x x%x %p\n",
ndlp, ndlp->nlp_DID,
ndlp->nlp_flag, data1,
ndlp->active_rrqs_xri_bitmap);
return ndlp;
}
}
spin_unlock_irqrestore(shost->host_lock, iflags);
/* FIND node did <did> NOT FOUND */
lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
"2026 FIND mapped did NOT FOUND.\n");
return NULL;
}
struct lpfc_nodelist *
lpfc_setup_disc_node(struct lpfc_vport *vport, uint32_t did)
{

2
drivers/scsi/lpfc/lpfc_hw.h
View File

@ -601,6 +601,7 @@ struct fc_vft_header {
#define ELS_CMD_RPL 0x57000000
#define ELS_CMD_FAN 0x60000000
#define ELS_CMD_RSCN 0x61040000
#define ELS_CMD_RSCN_XMT 0x61040008
#define ELS_CMD_SCR 0x62000000
#define ELS_CMD_RNID 0x78000000
#define ELS_CMD_LIRR 0x7A000000
@ -642,6 +643,7 @@ struct fc_vft_header {
#define ELS_CMD_RPL 0x57
#define ELS_CMD_FAN 0x60
#define ELS_CMD_RSCN 0x0461
#define ELS_CMD_RSCN_XMT 0x08000461
#define ELS_CMD_SCR 0x62
#define ELS_CMD_RNID 0x78
#define ELS_CMD_LIRR 0x7A

1
drivers/scsi/lpfc/lpfc_sli.c
View File

@ -9398,6 +9398,7 @@ lpfc_sli4_iocb2wqe(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq,
if (if_type >= LPFC_SLI_INTF_IF_TYPE_2) {
if (pcmd && (*pcmd == ELS_CMD_FLOGI ||
*pcmd == ELS_CMD_SCR ||
*pcmd == ELS_CMD_RSCN_XMT ||
*pcmd == ELS_CMD_FDISC ||
*pcmd == ELS_CMD_LOGO ||
*pcmd == ELS_CMD_PLOGI)) {