lpfc_els.c 208 KB
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/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
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 * Fibre Channel Host Bus Adapters.                                *
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 * Copyright (C) 2004-2008 Emulex.  All rights reserved.           *
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 * EMULEX and SLI are trademarks of Emulex.                        *
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 * www.emulex.com                                                  *
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 * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
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 *                                                                 *
 * This program is free software; you can redistribute it and/or   *
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 * modify it under the terms of version 2 of the GNU General       *
 * Public License as published by the Free Software Foundation.    *
 * This program is distributed in the hope that it will be useful. *
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
 * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
 * more details, a copy of which can be found in the file COPYING  *
 * included with this package.                                     *
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 *******************************************************************/
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/* See Fibre Channel protocol T11 FC-LS for details */
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#include <linux/blkdev.h>
#include <linux/pci.h>
#include <linux/interrupt.h>

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#include <scsi/scsi.h>
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#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport_fc.h>

#include "lpfc_hw.h"
#include "lpfc_sli.h"
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#include "lpfc_nl.h"
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#include "lpfc_disc.h"
#include "lpfc_scsi.h"
#include "lpfc.h"
#include "lpfc_logmsg.h"
#include "lpfc_crtn.h"
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#include "lpfc_vport.h"
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#include "lpfc_debugfs.h"
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static int lpfc_els_retry(struct lpfc_hba *, struct lpfc_iocbq *,
			  struct lpfc_iocbq *);
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static void lpfc_cmpl_fabric_iocb(struct lpfc_hba *, struct lpfc_iocbq *,
			struct lpfc_iocbq *);
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static void lpfc_fabric_abort_vport(struct lpfc_vport *vport);
static int lpfc_issue_els_fdisc(struct lpfc_vport *vport,
				struct lpfc_nodelist *ndlp, uint8_t retry);
static int lpfc_issue_fabric_iocb(struct lpfc_hba *phba,
				  struct lpfc_iocbq *iocb);
static void lpfc_register_new_vport(struct lpfc_hba *phba,
				    struct lpfc_vport *vport,
				    struct lpfc_nodelist *ndlp);
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static int lpfc_max_els_tries = 3;

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/**
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 * lpfc_els_chk_latt - Check host link attention event for a vport
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 * @vport: pointer to a host virtual N_Port data structure.
 *
 * This routine checks whether there is an outstanding host link
 * attention event during the discovery process with the @vport. It is done
 * by reading the HBA's Host Attention (HA) register. If there is any host
 * link attention events during this @vport's discovery process, the @vport
 * shall be marked as FC_ABORT_DISCOVERY, a host link attention clear shall
 * be issued if the link state is not already in host link cleared state,
 * and a return code shall indicate whether the host link attention event
 * had happened.
 *
 * Note that, if either the host link is in state LPFC_LINK_DOWN or @vport
 * state in LPFC_VPORT_READY, the request for checking host link attention
 * event will be ignored and a return code shall indicate no host link
 * attention event had happened.
 *
 * Return codes
 *   0 - no host link attention event happened
 *   1 - host link attention event happened
 **/
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int
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lpfc_els_chk_latt(struct lpfc_vport *vport)
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{
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	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
	struct lpfc_hba  *phba = vport->phba;
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	uint32_t ha_copy;

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	if (vport->port_state >= LPFC_VPORT_READY ||
	    phba->link_state == LPFC_LINK_DOWN)
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		return 0;

	/* Read the HBA Host Attention Register */
	ha_copy = readl(phba->HAregaddr);

	if (!(ha_copy & HA_LATT))
		return 0;

	/* Pending Link Event during Discovery */
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	lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
			 "0237 Pending Link Event during "
			 "Discovery: State x%x\n",
			 phba->pport->port_state);
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	/* CLEAR_LA should re-enable link attention events and
	 * we should then imediately take a LATT event. The
	 * LATT processing should call lpfc_linkdown() which
	 * will cleanup any left over in-progress discovery
	 * events.
	 */
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	spin_lock_irq(shost->host_lock);
	vport->fc_flag |= FC_ABORT_DISCOVERY;
	spin_unlock_irq(shost->host_lock);
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	if (phba->link_state != LPFC_CLEAR_LA)
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		lpfc_issue_clear_la(phba, vport);
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	return 1;
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}

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/**
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 * lpfc_prep_els_iocb - Allocate and prepare a lpfc iocb data structure
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 * @vport: pointer to a host virtual N_Port data structure.
 * @expectRsp: flag indicating whether response is expected.
 * @cmdSize: size of the ELS command.
 * @retry: number of retries to the command IOCB when it fails.
 * @ndlp: pointer to a node-list data structure.
 * @did: destination identifier.
 * @elscmd: the ELS command code.
 *
 * This routine is used for allocating a lpfc-IOCB data structure from
 * the driver lpfc-IOCB free-list and prepare the IOCB with the parameters
 * passed into the routine for discovery state machine to issue an Extended
 * Link Service (ELS) commands. It is a generic lpfc-IOCB allocation
 * and preparation routine that is used by all the discovery state machine
 * routines and the ELS command-specific fields will be later set up by
 * the individual discovery machine routines after calling this routine
 * allocating and preparing a generic IOCB data structure. It fills in the
 * Buffer Descriptor Entries (BDEs), allocates buffers for both command
 * payload and response payload (if expected). The reference count on the
 * ndlp is incremented by 1 and the reference to the ndlp is put into
 * context1 of the IOCB data structure for this IOCB to hold the ndlp
 * reference for the command's callback function to access later.
 *
 * Return code
 *   Pointer to the newly allocated/prepared els iocb data structure
 *   NULL - when els iocb data structure allocation/preparation failed
 **/
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static struct lpfc_iocbq *
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lpfc_prep_els_iocb(struct lpfc_vport *vport, uint8_t expectRsp,
		   uint16_t cmdSize, uint8_t retry,
		   struct lpfc_nodelist *ndlp, uint32_t did,
		   uint32_t elscmd)
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{
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	struct lpfc_hba  *phba = vport->phba;
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	struct lpfc_iocbq *elsiocb;
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	struct lpfc_dmabuf *pcmd, *prsp, *pbuflist;
	struct ulp_bde64 *bpl;
	IOCB_t *icmd;


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	if (!lpfc_is_link_up(phba))
		return NULL;
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	/* Allocate buffer for  command iocb */
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	elsiocb = lpfc_sli_get_iocbq(phba);
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	if (elsiocb == NULL)
		return NULL;
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	icmd = &elsiocb->iocb;

	/* fill in BDEs for command */
	/* Allocate buffer for command payload */
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	pcmd = kmalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
	if (pcmd)
		pcmd->virt = lpfc_mbuf_alloc(phba, MEM_PRI, &pcmd->phys);
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	if (!pcmd || !pcmd->virt)
		goto els_iocb_free_pcmb_exit;
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	INIT_LIST_HEAD(&pcmd->list);

	/* Allocate buffer for response payload */
	if (expectRsp) {
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		prsp = kmalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
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		if (prsp)
			prsp->virt = lpfc_mbuf_alloc(phba, MEM_PRI,
						     &prsp->phys);
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		if (!prsp || !prsp->virt)
			goto els_iocb_free_prsp_exit;
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		INIT_LIST_HEAD(&prsp->list);
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	} else
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		prsp = NULL;

	/* Allocate buffer for Buffer ptr list */
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	pbuflist = kmalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
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	if (pbuflist)
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		pbuflist->virt = lpfc_mbuf_alloc(phba, MEM_PRI,
						 &pbuflist->phys);
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	if (!pbuflist || !pbuflist->virt)
		goto els_iocb_free_pbuf_exit;
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	INIT_LIST_HEAD(&pbuflist->list);

	icmd->un.elsreq64.bdl.addrHigh = putPaddrHigh(pbuflist->phys);
	icmd->un.elsreq64.bdl.addrLow = putPaddrLow(pbuflist->phys);
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	icmd->un.elsreq64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
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	icmd->un.elsreq64.remoteID = did;	/* DID */
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	if (expectRsp) {
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		icmd->un.elsreq64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
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		icmd->ulpCommand = CMD_ELS_REQUEST64_CR;
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		icmd->ulpTimeout = phba->fc_ratov * 2;
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	} else {
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		icmd->un.elsreq64.bdl.bdeSize = sizeof(struct ulp_bde64);
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		icmd->ulpCommand = CMD_XMIT_ELS_RSP64_CX;
	}
	icmd->ulpBdeCount = 1;
	icmd->ulpLe = 1;
	icmd->ulpClass = CLASS3;

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	if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) {
		icmd->un.elsreq64.myID = vport->fc_myDID;

		/* For ELS_REQUEST64_CR, use the VPI by default */
		icmd->ulpContext = vport->vpi;
		icmd->ulpCt_h = 0;
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		/* The CT field must be 0=INVALID_RPI for the ECHO cmd */
		if (elscmd == ELS_CMD_ECHO)
			icmd->ulpCt_l = 0; /* context = invalid RPI */
		else
			icmd->ulpCt_l = 1; /* context = VPI */
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	}

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	bpl = (struct ulp_bde64 *) pbuflist->virt;
	bpl->addrLow = le32_to_cpu(putPaddrLow(pcmd->phys));
	bpl->addrHigh = le32_to_cpu(putPaddrHigh(pcmd->phys));
	bpl->tus.f.bdeSize = cmdSize;
	bpl->tus.f.bdeFlags = 0;
	bpl->tus.w = le32_to_cpu(bpl->tus.w);

	if (expectRsp) {
		bpl++;
		bpl->addrLow = le32_to_cpu(putPaddrLow(prsp->phys));
		bpl->addrHigh = le32_to_cpu(putPaddrHigh(prsp->phys));
		bpl->tus.f.bdeSize = FCELSSIZE;
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		bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
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		bpl->tus.w = le32_to_cpu(bpl->tus.w);
	}

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	/* prevent preparing iocb with NULL ndlp reference */
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	elsiocb->context1 = lpfc_nlp_get(ndlp);
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	if (!elsiocb->context1)
		goto els_iocb_free_pbuf_exit;
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	elsiocb->context2 = pcmd;
	elsiocb->context3 = pbuflist;
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	elsiocb->retry = retry;
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	elsiocb->vport = vport;
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	elsiocb->drvrTimeout = (phba->fc_ratov << 1) + LPFC_DRVR_TIMEOUT;

	if (prsp) {
		list_add(&prsp->list, &pcmd->list);
	}
	if (expectRsp) {
		/* Xmit ELS command <elsCmd> to remote NPORT <did> */
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		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
				 "0116 Xmit ELS command x%x to remote "
				 "NPORT x%x I/O tag: x%x, port state: x%x\n",
				 elscmd, did, elsiocb->iotag,
				 vport->port_state);
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	} else {
		/* Xmit ELS response <elsCmd> to remote NPORT <did> */
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		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
				 "0117 Xmit ELS response x%x to remote "
				 "NPORT x%x I/O tag: x%x, size: x%x\n",
				 elscmd, ndlp->nlp_DID, elsiocb->iotag,
				 cmdSize);
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	}
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	return elsiocb;
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els_iocb_free_pbuf_exit:
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	if (expectRsp)
		lpfc_mbuf_free(phba, prsp->virt, prsp->phys);
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	kfree(pbuflist);

els_iocb_free_prsp_exit:
	lpfc_mbuf_free(phba, pcmd->virt, pcmd->phys);
	kfree(prsp);

els_iocb_free_pcmb_exit:
	kfree(pcmd);
	lpfc_sli_release_iocbq(phba, elsiocb);
	return NULL;
}
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/**
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 * lpfc_issue_fabric_reglogin - Issue fabric registration login for a vport
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 * @vport: pointer to a host virtual N_Port data structure.
 *
 * This routine issues a fabric registration login for a @vport. An
 * active ndlp node with Fabric_DID must already exist for this @vport.
 * The routine invokes two mailbox commands to carry out fabric registration
 * login through the HBA firmware: the first mailbox command requests the
 * HBA to perform link configuration for the @vport; and the second mailbox
 * command requests the HBA to perform the actual fabric registration login
 * with the @vport.
 *
 * Return code
 *   0 - successfully issued fabric registration login for @vport
 *   -ENXIO -- failed to issue fabric registration login for @vport
 **/
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static int
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lpfc_issue_fabric_reglogin(struct lpfc_vport *vport)
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{
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	struct lpfc_hba  *phba = vport->phba;
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	LPFC_MBOXQ_t *mbox;
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	struct lpfc_dmabuf *mp;
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	struct lpfc_nodelist *ndlp;
	struct serv_parm *sp;
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	int rc;
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	int err = 0;
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	sp = &phba->fc_fabparam;
	ndlp = lpfc_findnode_did(vport, Fabric_DID);
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	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
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		err = 1;
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		goto fail;
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	}
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	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
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	if (!mbox) {
		err = 2;
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		goto fail;
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	}
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	vport->port_state = LPFC_FABRIC_CFG_LINK;
	lpfc_config_link(phba, mbox);
	mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
	mbox->vport = vport;

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	rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
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	if (rc == MBX_NOT_FINISHED) {
		err = 3;
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		goto fail_free_mbox;
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	}
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	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
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	if (!mbox) {
		err = 4;
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		goto fail;
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	}
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	rc = lpfc_reg_login(phba, vport->vpi, Fabric_DID, (uint8_t *)sp, mbox,
			    0);
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	if (rc) {
		err = 5;
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		goto fail_free_mbox;
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	}
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	mbox->mbox_cmpl = lpfc_mbx_cmpl_fabric_reg_login;
	mbox->vport = vport;
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	/* increment the reference count on ndlp to hold reference
	 * for the callback routine.
	 */
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	mbox->context2 = lpfc_nlp_get(ndlp);

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	rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
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	if (rc == MBX_NOT_FINISHED) {
		err = 6;
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		goto fail_issue_reg_login;
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	}
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	return 0;

fail_issue_reg_login:
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	/* decrement the reference count on ndlp just incremented
	 * for the failed mbox command.
	 */
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	lpfc_nlp_put(ndlp);
	mp = (struct lpfc_dmabuf *) mbox->context1;
	lpfc_mbuf_free(phba, mp->virt, mp->phys);
	kfree(mp);
fail_free_mbox:
	mempool_free(mbox, phba->mbox_mem_pool);

fail:
	lpfc_vport_set_state(vport, FC_VPORT_FAILED);
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	lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
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		"0249 Cannot issue Register Fabric login: Err %d\n", err);
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	return -ENXIO;
}

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/**
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 * lpfc_cmpl_els_flogi_fabric - Completion function for flogi to a fabric port
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 * @vport: pointer to a host virtual N_Port data structure.
 * @ndlp: pointer to a node-list data structure.
 * @sp: pointer to service parameter data structure.
 * @irsp: pointer to the IOCB within the lpfc response IOCB.
 *
 * This routine is invoked by the lpfc_cmpl_els_flogi() completion callback
 * function to handle the completion of a Fabric Login (FLOGI) into a fabric
 * port in a fabric topology. It properly sets up the parameters to the @ndlp
 * from the IOCB response. It also check the newly assigned N_Port ID to the
 * @vport against the previously assigned N_Port ID. If it is different from
 * the previously assigned Destination ID (DID), the lpfc_unreg_rpi() routine
 * is invoked on all the remaining nodes with the @vport to unregister the
 * Remote Port Indicators (RPIs). Finally, the lpfc_issue_fabric_reglogin()
 * is invoked to register login to the fabric.
 *
 * Return code
 *   0 - Success (currently, always return 0)
 **/
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static int
lpfc_cmpl_els_flogi_fabric(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
			   struct serv_parm *sp, IOCB_t *irsp)
{
	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
	struct lpfc_hba  *phba = vport->phba;
	struct lpfc_nodelist *np;
	struct lpfc_nodelist *next_np;

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	spin_lock_irq(shost->host_lock);
	vport->fc_flag |= FC_FABRIC;
	spin_unlock_irq(shost->host_lock);
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	phba->fc_edtov = be32_to_cpu(sp->cmn.e_d_tov);
	if (sp->cmn.edtovResolution)	/* E_D_TOV ticks are in nanoseconds */
		phba->fc_edtov = (phba->fc_edtov + 999999) / 1000000;

	phba->fc_ratov = (be32_to_cpu(sp->cmn.w2.r_a_tov) + 999) / 1000;

	if (phba->fc_topology == TOPOLOGY_LOOP) {
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		spin_lock_irq(shost->host_lock);
		vport->fc_flag |= FC_PUBLIC_LOOP;
		spin_unlock_irq(shost->host_lock);
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	} else {
		/*
		 * If we are a N-port connected to a Fabric, fixup sparam's so
		 * logins to devices on remote loops work.
		 */
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		vport->fc_sparam.cmn.altBbCredit = 1;
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	}

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	vport->fc_myDID = irsp->un.ulpWord[4] & Mask_DID;
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	memcpy(&ndlp->nlp_portname, &sp->portName, sizeof(struct lpfc_name));
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	memcpy(&ndlp->nlp_nodename, &sp->nodeName, sizeof(struct lpfc_name));
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	ndlp->nlp_class_sup = 0;
	if (sp->cls1.classValid)
		ndlp->nlp_class_sup |= FC_COS_CLASS1;
	if (sp->cls2.classValid)
		ndlp->nlp_class_sup |= FC_COS_CLASS2;
	if (sp->cls3.classValid)
		ndlp->nlp_class_sup |= FC_COS_CLASS3;
	if (sp->cls4.classValid)
		ndlp->nlp_class_sup |= FC_COS_CLASS4;
	ndlp->nlp_maxframe = ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) |
				sp->cmn.bbRcvSizeLsb;
	memcpy(&phba->fc_fabparam, sp, sizeof(struct serv_parm));

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	if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) {
		if (sp->cmn.response_multiple_NPort) {
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			lpfc_printf_vlog(vport, KERN_WARNING,
					 LOG_ELS | LOG_VPORT,
					 "1816 FLOGI NPIV supported, "
					 "response data 0x%x\n",
					 sp->cmn.response_multiple_NPort);
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			phba->link_flag |= LS_NPIV_FAB_SUPPORTED;
		} else {
			/* Because we asked f/w for NPIV it still expects us
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			to call reg_vnpid atleast for the physcial host */
			lpfc_printf_vlog(vport, KERN_WARNING,
					 LOG_ELS | LOG_VPORT,
					 "1817 Fabric does not support NPIV "
					 "- configuring single port mode.\n");
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			phba->link_flag &= ~LS_NPIV_FAB_SUPPORTED;
		}
	}
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	if ((vport->fc_prevDID != vport->fc_myDID) &&
		!(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) {
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		/* If our NportID changed, we need to ensure all
		 * remaining NPORTs get unreg_login'ed.
		 */
		list_for_each_entry_safe(np, next_np,
					&vport->fc_nodes, nlp_listp) {
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			if (!NLP_CHK_NODE_ACT(np))
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				continue;
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			if ((np->nlp_state != NLP_STE_NPR_NODE) ||
				   !(np->nlp_flag & NLP_NPR_ADISC))
				continue;
			spin_lock_irq(shost->host_lock);
			np->nlp_flag &= ~NLP_NPR_ADISC;
			spin_unlock_irq(shost->host_lock);
			lpfc_unreg_rpi(vport, np);
		}
		if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) {
			lpfc_mbx_unreg_vpi(vport);
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			spin_lock_irq(shost->host_lock);
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			vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
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			spin_unlock_irq(shost->host_lock);
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		}
	}
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	lpfc_nlp_set_state(vport, ndlp, NLP_STE_REG_LOGIN_ISSUE);
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	if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED &&
	    vport->fc_flag & FC_VPORT_NEEDS_REG_VPI) {
		lpfc_register_new_vport(phba, vport, ndlp);
		return 0;
	}
	lpfc_issue_fabric_reglogin(vport);
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	return 0;
}

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/**
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 * lpfc_cmpl_els_flogi_nport - Completion function for flogi to an N_Port
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 * @vport: pointer to a host virtual N_Port data structure.
 * @ndlp: pointer to a node-list data structure.
 * @sp: pointer to service parameter data structure.
 *
 * This routine is invoked by the lpfc_cmpl_els_flogi() completion callback
 * function to handle the completion of a Fabric Login (FLOGI) into an N_Port
 * in a point-to-point topology. First, the @vport's N_Port Name is compared
 * with the received N_Port Name: if the @vport's N_Port Name is greater than
 * the received N_Port Name lexicographically, this node shall assign local
 * N_Port ID (PT2PT_LocalID: 1) and remote N_Port ID (PT2PT_RemoteID: 2) and
 * will send out Port Login (PLOGI) with the N_Port IDs assigned. Otherwise,
 * this node shall just wait for the remote node to issue PLOGI and assign
 * N_Port IDs.
 *
 * Return code
 *   0 - Success
 *   -ENXIO - Fail
 **/
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static int
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lpfc_cmpl_els_flogi_nport(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
			  struct serv_parm *sp)
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{
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	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
	struct lpfc_hba  *phba = vport->phba;
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	LPFC_MBOXQ_t *mbox;
	int rc;

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	spin_lock_irq(shost->host_lock);
	vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
	spin_unlock_irq(shost->host_lock);
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	phba->fc_edtov = FF_DEF_EDTOV;
	phba->fc_ratov = FF_DEF_RATOV;
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	rc = memcmp(&vport->fc_portname, &sp->portName,
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		    sizeof(vport->fc_portname));
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	if (rc >= 0) {
		/* This side will initiate the PLOGI */
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		spin_lock_irq(shost->host_lock);
		vport->fc_flag |= FC_PT2PT_PLOGI;
		spin_unlock_irq(shost->host_lock);
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		/*
		 * N_Port ID cannot be 0, set our to LocalID the other
		 * side will be RemoteID.
		 */

		/* not equal */
		if (rc)
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			vport->fc_myDID = PT2PT_LocalID;
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		mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
		if (!mbox)
			goto fail;

		lpfc_config_link(phba, mbox);

		mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
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		mbox->vport = vport;
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		rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
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		if (rc == MBX_NOT_FINISHED) {
			mempool_free(mbox, phba->mbox_mem_pool);
			goto fail;
		}
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		/* Decrement ndlp reference count indicating that ndlp can be
		 * safely released when other references to it are done.
		 */
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		lpfc_nlp_put(ndlp);
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		ndlp = lpfc_findnode_did(vport, PT2PT_RemoteID);
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		if (!ndlp) {
			/*
			 * Cannot find existing Fabric ndlp, so allocate a
			 * new one
			 */
			ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
			if (!ndlp)
				goto fail;
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			lpfc_nlp_init(vport, ndlp, PT2PT_RemoteID);
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		} else if (!NLP_CHK_NODE_ACT(ndlp)) {
			ndlp = lpfc_enable_node(vport, ndlp,
						NLP_STE_UNUSED_NODE);
			if(!ndlp)
				goto fail;
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		}

		memcpy(&ndlp->nlp_portname, &sp->portName,
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		       sizeof(struct lpfc_name));
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		memcpy(&ndlp->nlp_nodename, &sp->nodeName,
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		       sizeof(struct lpfc_name));
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		/* Set state will put ndlp onto node list if not already done */
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		lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
		spin_lock_irq(shost->host_lock);
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		ndlp->nlp_flag |= NLP_NPR_2B_DISC;
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		spin_unlock_irq(shost->host_lock);
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	} else
		/* This side will wait for the PLOGI, decrement ndlp reference
		 * count indicating that ndlp can be released when other
		 * references to it are done.
		 */
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		lpfc_nlp_put(ndlp);
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	/* If we are pt2pt with another NPort, force NPIV off! */
	phba->sli3_options &= ~LPFC_SLI3_NPIV_ENABLED;

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	spin_lock_irq(shost->host_lock);
	vport->fc_flag |= FC_PT2PT;
	spin_unlock_irq(shost->host_lock);
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	/* Start discovery - this should just do CLEAR_LA */
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	lpfc_disc_start(vport);
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	return 0;
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fail:
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	return -ENXIO;
}

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/**
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 * lpfc_cmpl_els_flogi - Completion callback function for flogi
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 * @phba: pointer to lpfc hba data structure.
 * @cmdiocb: pointer to lpfc command iocb data structure.
 * @rspiocb: pointer to lpfc response iocb data structure.
 *
 * This routine is the top-level completion callback function for issuing
 * a Fabric Login (FLOGI) command. If the response IOCB reported error,
 * the lpfc_els_retry() routine shall be invoked to retry the FLOGI. If
 * retry has been made (either immediately or delayed with lpfc_els_retry()
 * returning 1), the command IOCB will be released and function returned.
 * If the retry attempt has been given up (possibly reach the maximum
 * number of retries), one additional decrement of ndlp reference shall be
 * invoked before going out after releasing the command IOCB. This will
 * actually release the remote node (Note, lpfc_els_free_iocb() will also
 * invoke one decrement of ndlp reference count). If no error reported in
 * the IOCB status, the command Port ID field is used to determine whether
 * this is a point-to-point topology or a fabric topology: if the Port ID
 * field is assigned, it is a fabric topology; otherwise, it is a
 * point-to-point topology. The routine lpfc_cmpl_els_flogi_fabric() or
 * lpfc_cmpl_els_flogi_nport() shall be invoked accordingly to handle the
 * specific topology completion conditions.
 **/
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static void
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lpfc_cmpl_els_flogi(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
		    struct lpfc_iocbq *rspiocb)
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{
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	struct lpfc_vport *vport = cmdiocb->vport;
	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
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	IOCB_t *irsp = &rspiocb->iocb;
	struct lpfc_nodelist *ndlp = cmdiocb->context1;
	struct lpfc_dmabuf *pcmd = cmdiocb->context2, *prsp;
	struct serv_parm *sp;
	int rc;

	/* Check to see if link went down during discovery */
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	if (lpfc_els_chk_latt(vport)) {
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		/* One additional decrement on node reference count to
		 * trigger the release of the node
		 */
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		lpfc_nlp_put(ndlp);
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		goto out;
	}

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	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
		"FLOGI cmpl:      status:x%x/x%x state:x%x",
		irsp->ulpStatus, irsp->un.ulpWord[4],
		vport->port_state);

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	if (irsp->ulpStatus) {
		/* Check for retry */
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		if (lpfc_els_retry(phba, cmdiocb, rspiocb))
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			goto out;
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		/* FLOGI failed, so there is no fabric */
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		spin_lock_irq(shost->host_lock);
		vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
		spin_unlock_irq(shost->host_lock);
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		/* If private loop, then allow max outstanding els to be
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		 * LPFC_MAX_DISC_THREADS (32). Scanning in the case of no
		 * alpa map would take too long otherwise.
		 */
		if (phba->alpa_map[0] == 0) {
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			vport->cfg_discovery_threads = LPFC_MAX_DISC_THREADS;
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		}

		/* FLOGI failure */
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		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
				 "0100 FLOGI failure Data: x%x x%x "
				 "x%x\n",
				 irsp->ulpStatus, irsp->un.ulpWord[4],
				 irsp->ulpTimeout);
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		goto flogifail;
	}

	/*
	 * The FLogI succeeded.  Sync the data for the CPU before
	 * accessing it.
	 */
	prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);

	sp = prsp->virt + sizeof(uint32_t);

	/* FLOGI completes successfully */
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	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
			 "0101 FLOGI completes sucessfully "
			 "Data: x%x x%x x%x x%x\n",
			 irsp->un.ulpWord[4], sp->cmn.e_d_tov,
			 sp->cmn.w2.r_a_tov, sp->cmn.edtovResolution);
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	if (vport->port_state == LPFC_FLOGI) {
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		/*
		 * If Common Service Parameters indicate Nport
		 * we are point to point, if Fport we are Fabric.
		 */
		if (sp->cmn.fPort)
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			rc = lpfc_cmpl_els_flogi_fabric(vport, ndlp, sp, irsp);
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		else
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			rc = lpfc_cmpl_els_flogi_nport(vport, ndlp, sp);
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		if (!rc)
			goto out;
	}

flogifail:
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	lpfc_nlp_put(ndlp);
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	if (!lpfc_error_lost_link(irsp)) {
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		/* FLOGI failed, so just use loop map to make discovery list */
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		lpfc_disc_list_loopmap(vport);
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		/* Start discovery */
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		lpfc_disc_start(vport);
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	} else if (((irsp->ulpStatus != IOSTAT_LOCAL_REJECT) ||
			((irsp->un.ulpWord[4] != IOERR_SLI_ABORTED) &&
			(irsp->un.ulpWord[4] != IOERR_SLI_DOWN))) &&
			(phba->link_state != LPFC_CLEAR_LA)) {
		/* If FLOGI failed enable link interrupt. */
		lpfc_issue_clear_la(phba, vport);
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	}
out:
	lpfc_els_free_iocb(phba, cmdiocb);
}

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/**
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 * lpfc_issue_els_flogi - Issue an flogi iocb command for a vport
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 * @vport: pointer to a host virtual N_Port data structure.
 * @ndlp: pointer to a node-list data structure.
 * @retry: number of retries to the command IOCB.
 *
 * This routine issues a Fabric Login (FLOGI) Request ELS command
 * for a @vport. The initiator service parameters are put into the payload
 * of the FLOGI Request IOCB and the top-level callback function pointer
 * to lpfc_cmpl_els_flogi() routine is put to the IOCB completion callback
 * function field. The lpfc_issue_fabric_iocb routine is invoked to send
 * out FLOGI ELS command with one outstanding fabric IOCB at a time.
 *
 * 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 FLOGI ELS command.
 *
 * Return code
 *   0 - successfully issued flogi iocb for @vport
 *   1 - failed to issue flogi iocb for @vport
 **/
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static int
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lpfc_issue_els_flogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
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		     uint8_t retry)
{
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	struct lpfc_hba  *phba = vport->phba;
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	struct serv_parm *sp;
	IOCB_t *icmd;
	struct lpfc_iocbq *elsiocb;
	struct lpfc_sli_ring *pring;
	uint8_t *pcmd;
	uint16_t cmdsize;
	uint32_t tmo;
	int rc;

	pring = &phba->sli.ring[LPFC_ELS_RING];

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	cmdsize = (sizeof(uint32_t) + sizeof(struct serv_parm));
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	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
				     ndlp->nlp_DID, ELS_CMD_FLOGI);
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	if (!elsiocb)
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		return 1;
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	icmd = &elsiocb->iocb;
	pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);

	/* For FLOGI request, remainder of payload is service parameters */
	*((uint32_t *) (pcmd)) = ELS_CMD_FLOGI;
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	pcmd += sizeof(uint32_t);
	memcpy(pcmd, &vport->fc_sparam, sizeof(struct serv_parm));
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	sp = (struct serv_parm *) pcmd;

	/* Setup CSPs accordingly for Fabric */
	sp->cmn.e_d_tov = 0;
	sp->cmn.w2.r_a_tov = 0;
	sp->cls1.classValid = 0;
	sp->cls2.seqDelivery = 1;
	sp->cls3.seqDelivery = 1;
	if (sp->cmn.fcphLow < FC_PH3)
		sp->cmn.fcphLow = FC_PH3;
	if (sp->cmn.fcphHigh < FC_PH3)
		sp->cmn.fcphHigh = FC_PH3;

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	if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) {
		sp->cmn.request_multiple_Nport = 1;

		/* For FLOGI, Let FLOGI rsp set the NPortID for VPI 0 */
		icmd->ulpCt_h = 1;
		icmd->ulpCt_l = 0;
	}

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	if (phba->fc_topology != TOPOLOGY_LOOP) {
		icmd->un.elsreq64.myID = 0;
		icmd->un.elsreq64.fl = 1;
	}

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	tmo = phba->fc_ratov;
	phba->fc_ratov = LPFC_DISC_FLOGI_TMO;
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	lpfc_set_disctmo(vport);
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	phba->fc_ratov = tmo;

	phba->fc_stat.elsXmitFLOGI++;
	elsiocb->iocb_cmpl = lpfc_cmpl_els_flogi;
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	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
		"Issue FLOGI:     opt:x%x",
		phba->sli3_options, 0, 0);

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	rc = lpfc_issue_fabric_iocb(phba, elsiocb);
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	if (rc == IOCB_ERROR) {
		lpfc_els_free_iocb(phba, elsiocb);
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		return 1;
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	}
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	return 0;
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}

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/**
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 * lpfc_els_abort_flogi - Abort all outstanding flogi iocbs
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 * @phba: pointer to lpfc hba data structure.
 *
 * This routine aborts all the outstanding Fabric Login (FLOGI) IOCBs
 * with a @phba. This routine walks all the outstanding IOCBs on the txcmplq
 * list and issues an abort IOCB commond on each outstanding IOCB that
 * contains a active Fabric_DID ndlp. Note that this function is to issue
 * the abort IOCB command on all the outstanding IOCBs, thus when this
 * function returns, it does not guarantee all the IOCBs are actually aborted.
 *
 * Return code
 *   0 - Sucessfully issued abort iocb on all outstanding flogis (Always 0)
 **/
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int
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lpfc_els_abort_flogi(struct lpfc_hba *phba)
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{
	struct lpfc_sli_ring *pring;
	struct lpfc_iocbq *iocb, *next_iocb;
	struct lpfc_nodelist *ndlp;
	IOCB_t *icmd;

	/* Abort outstanding I/O on NPort <nlp_DID> */
	lpfc_printf_log(phba, KERN_INFO, LOG_DISCOVERY,
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			"0201 Abort outstanding I/O on NPort x%x\n",
			Fabric_DID);
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	pring = &phba->sli.ring[LPFC_ELS_RING];

	/*
	 * Check the txcmplq for an iocb that matches the nport the driver is
	 * searching for.
	 */
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	spin_lock_irq(&phba->hbalock);
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	list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
		icmd = &iocb->iocb;
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		if (icmd->ulpCommand == CMD_ELS_REQUEST64_CR &&
		    icmd->un.elsreq64.bdl.ulpIoTag32) {
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			ndlp = (struct lpfc_nodelist *)(iocb->context1);
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			if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
			    (ndlp->nlp_DID == Fabric_DID))
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				lpfc_sli_issue_abort_iotag(phba, pring, iocb);
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		}
	}
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	spin_unlock_irq(&phba->hbalock);
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	return 0;
}

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/**
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 * lpfc_initial_flogi - Issue an initial fabric login for a vport
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 * @vport: pointer to a host virtual N_Port data structure.
 *
 * This routine issues an initial Fabric Login (FLOGI) for the @vport
 * specified. It first searches the ndlp with the Fabric_DID (0xfffffe) from
 * the @vport's ndlp list. If no such ndlp found, it will create an ndlp and
 * put it into the @vport's ndlp list. If an inactive ndlp found on the list,
 * it will just be enabled and made active. The lpfc_issue_els_flogi() routine
 * is then invoked with the @vport and the ndlp to perform the FLOGI for the
 * @vport.
 *
 * Return code
 *   0 - failed to issue initial flogi for @vport
 *   1 - successfully issued initial flogi for @vport
 **/
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int
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lpfc_initial_flogi(struct lpfc_vport *vport)
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{
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	struct lpfc_hba *phba = vport->phba;
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	struct lpfc_nodelist *ndlp;

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	vport->port_state = LPFC_FLOGI;
	lpfc_set_disctmo(vport);

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	/* First look for the Fabric ndlp */
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	ndlp = lpfc_findnode_did(vport, Fabric_DID);
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	if (!ndlp) {
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		/* Cannot find existing Fabric ndlp, so allocate a new one */
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		ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
		if (!ndlp)
			return 0;
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		lpfc_nlp_init(vport, ndlp, Fabric_DID);
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		/* Put ndlp onto node list */
		lpfc_enqueue_node(vport, ndlp);
	} else if (!NLP_CHK_NODE_ACT(ndlp)) {
		/* re-setup ndlp without removing from node list */
		ndlp = lpfc_enable_node(vport, ndlp, NLP_STE_UNUSED_NODE);
		if (!ndlp)
			return 0;
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	}
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	if (lpfc_issue_els_flogi(vport, ndlp, 0))
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		/* This decrement of reference count to node shall kick off
		 * the release of the node.
		 */
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		lpfc_nlp_put(ndlp);
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	return 1;
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}

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/**
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 * lpfc_initial_fdisc - Issue an initial fabric discovery for a vport
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 * @vport: pointer to a host virtual N_Port data structure.
 *
 * This routine issues an initial Fabric Discover (FDISC) for the @vport
 * specified. It first searches the ndlp with the Fabric_DID (0xfffffe) from
 * the @vport's ndlp list. If no such ndlp found, it will create an ndlp and
 * put it into the @vport's ndlp list. If an inactive ndlp found on the list,
 * it will just be enabled and made active. The lpfc_issue_els_fdisc() routine
 * is then invoked with the @vport and the ndlp to perform the FDISC for the
 * @vport.
 *
 * Return code
 *   0 - failed to issue initial fdisc for @vport
 *   1 - successfully issued initial fdisc for @vport
 **/
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int
lpfc_initial_fdisc(struct lpfc_vport *vport)
{
	struct lpfc_hba *phba = vport->phba;
	struct lpfc_nodelist *ndlp;

	/* First look for the Fabric ndlp */
	ndlp = lpfc_findnode_did(vport, Fabric_DID);
	if (!ndlp) {
		/* Cannot find existing Fabric ndlp, so allocate a new one */
		ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
		if (!ndlp)
			return 0;
		lpfc_nlp_init(vport, ndlp, Fabric_DID);
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		/* Put ndlp onto node list */
		lpfc_enqueue_node(vport, ndlp);
	} else if (!NLP_CHK_NODE_ACT(ndlp)) {
		/* re-setup ndlp without removing from node list */
		ndlp = lpfc_enable_node(vport, ndlp, NLP_STE_UNUSED_NODE);
		if (!ndlp)
			return 0;
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	}
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990
	if (lpfc_issue_els_fdisc(vport, ndlp, 0)) {
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		/* decrement node reference count to trigger the release of
		 * the node.
		 */
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		lpfc_nlp_put(ndlp);
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		return 0;
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	}
	return 1;
}
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/**
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 * lpfc_more_plogi - Check and issue remaining plogis for a vport
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 * @vport: pointer to a host virtual N_Port data structure.
 *
 * This routine checks whether there are more remaining Port Logins
 * (PLOGI) to be issued for the @vport. If so, it will invoke the routine
 * lpfc_els_disc_plogi() to go through the Node Port Recovery (NPR) nodes
 * to issue ELS PLOGIs up to the configured discover threads with the
 * @vport (@vport->cfg_discovery_threads). The function also decrement
 * the @vport's num_disc_node by 1 if it is not already 0.
 **/
1011
void
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lpfc_more_plogi(struct lpfc_vport *vport)
1013 1014 1015
{
	int sentplogi;

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	if (vport->num_disc_nodes)
		vport->num_disc_nodes--;
1018 1019

	/* Continue discovery with <num_disc_nodes> PLOGIs to go */
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	lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
			 "0232 Continue discovery with %d PLOGIs to go "
			 "Data: x%x x%x x%x\n",
			 vport->num_disc_nodes, vport->fc_plogi_cnt,
			 vport->fc_flag, vport->port_state);
1025
	/* Check to see if there are more PLOGIs to be sent */
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	if (vport->fc_flag & FC_NLP_MORE)
		/* go thru NPR nodes and issue any remaining ELS PLOGIs */
		sentplogi = lpfc_els_disc_plogi(vport);

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	return;
}

1033
/**
1034
 * lpfc_plogi_confirm_nport - Confirm pologi wwpn matches stored ndlp
1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063
 * @phba: pointer to lpfc hba data structure.
 * @prsp: pointer to response IOCB payload.
 * @ndlp: pointer to a node-list data structure.
 *
 * This routine checks and indicates whether the WWPN of an N_Port, retrieved
 * from a PLOGI, matches the WWPN that is stored in the @ndlp for that N_POrt.
 * The following cases are considered N_Port confirmed:
 * 1) The N_Port is a Fabric ndlp; 2) The @ndlp is on vport list and matches
 * the WWPN of the N_Port logged into; 3) The @ndlp is not on vport list but
 * it does not have WWPN assigned either. If the WWPN is confirmed, the
 * pointer to the @ndlp will be returned. If the WWPN is not confirmed:
 * 1) if there is a node on vport list other than the @ndlp with the same
 * WWPN of the N_Port PLOGI logged into, the lpfc_unreg_rpi() will be invoked
 * on that node to release the RPI associated with the node; 2) if there is
 * no node found on vport list with the same WWPN of the N_Port PLOGI logged
 * into, a new node shall be allocated (or activated). In either case, the
 * parameters of the @ndlp shall be copied to the new_ndlp, the @ndlp shall
 * be released and the new_ndlp shall be put on to the vport node list and
 * its pointer returned as the confirmed node.
 *
 * Note that before the @ndlp got "released", the keepDID from not-matching
 * or inactive "new_ndlp" on the vport node list is assigned to the nlp_DID
 * of the @ndlp. This is because the release of @ndlp is actually to put it
 * into an inactive state on the vport node list and the vport node list
 * management algorithm does not allow two node with a same DID.
 *
 * Return code
 *   pointer to the PLOGI N_Port @ndlp
 **/
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static struct lpfc_nodelist *
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lpfc_plogi_confirm_nport(struct lpfc_hba *phba, uint32_t *prsp,
1066 1067
			 struct lpfc_nodelist *ndlp)
{
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	struct lpfc_vport    *vport = ndlp->vport;
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	struct lpfc_nodelist *new_ndlp;
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	struct lpfc_rport_data *rdata;
	struct fc_rport *rport;
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	struct serv_parm *sp;
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	uint8_t  name[sizeof(struct lpfc_name)];
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	uint32_t rc, keepDID = 0;
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	/* Fabric nodes can have the same WWPN so we don't bother searching
	 * by WWPN.  Just return the ndlp that was given to us.
	 */
	if (ndlp->nlp_type & NLP_FABRIC)
		return ndlp;

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	sp = (struct serv_parm *) ((uint8_t *) prsp + sizeof(uint32_t));
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	memset(name, 0, sizeof(struct lpfc_name));
1084

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	/* Now we find out if the NPort we are logging into, matches the WWPN
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	 * we have for that ndlp. If not, we have some work to do.
	 */
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	new_ndlp = lpfc_findnode_wwpn(vport, &sp->portName);
1089

1090
	if (new_ndlp == ndlp && NLP_CHK_NODE_ACT(new_ndlp))
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		return ndlp;

	if (!new_ndlp) {
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		rc = memcmp(&ndlp->nlp_portname, name,
			    sizeof(struct lpfc_name));
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		if (!rc)
			return ndlp;
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		new_ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_ATOMIC);
		if (!new_ndlp)
			return ndlp;
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		lpfc_nlp_init(vport, new_ndlp, ndlp->nlp_DID);
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	} else if (!NLP_CHK_NODE_ACT(new_ndlp)) {
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		rc = memcmp(&ndlp->nlp_portname, name,
			    sizeof(struct lpfc_name));
		if (!rc)
			return ndlp;
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		new_ndlp = lpfc_enable_node(vport, new_ndlp,
						NLP_STE_UNUSED_NODE);
		if (!new_ndlp)
			return ndlp;
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		keepDID = new_ndlp->nlp_DID;
	} else
		keepDID = new_ndlp->nlp_DID;
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	lpfc_unreg_rpi(vport, new_ndlp);
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	new_ndlp->nlp_DID = ndlp->nlp_DID;
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	new_ndlp->nlp_prev_state = ndlp->nlp_prev_state;
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	if (ndlp->nlp_flag & NLP_NPR_2B_DISC)
		new_ndlp->nlp_flag |= NLP_NPR_2B_DISC;
	ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;

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	/* Set state will put new_ndlp on to node list if not already done */
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	lpfc_nlp_set_state(vport, new_ndlp, ndlp->nlp_state);
1125

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	/* Move this back to NPR state */
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	if (memcmp(&ndlp->nlp_portname, name, sizeof(struct lpfc_name)) == 0) {
		/* The new_ndlp is replacing ndlp totally, so we need
		 * to put ndlp on UNUSED list and try to free it.
		 */
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		/* Fix up the rport accordingly */
		rport =  ndlp->rport;
		if (rport) {
			rdata = rport->dd_data;
			if (rdata->pnode == ndlp) {
				lpfc_nlp_put(ndlp);
				ndlp->rport = NULL;
				rdata->pnode = lpfc_nlp_get(new_ndlp);
				new_ndlp->rport = rport;
			}
			new_ndlp->nlp_type = ndlp->nlp_type;
		}
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		/* We shall actually free the ndlp with both nlp_DID and
		 * nlp_portname fields equals 0 to avoid any ndlp on the
		 * nodelist never to be used.
		 */
		if (ndlp->nlp_DID == 0) {
			spin_lock_irq(&phba->ndlp_lock);
			NLP_SET_FREE_REQ(ndlp);
			spin_unlock_irq(&phba->ndlp_lock);
		}
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		/* Two ndlps cannot have the same did on the nodelist */
		ndlp->nlp_DID = keepDID;
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		lpfc_drop_node(vport, ndlp);
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	}
1158
	else {
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		lpfc_unreg_rpi(vport, ndlp);
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		/* Two ndlps cannot have the same did */
		ndlp->nlp_DID = keepDID;
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		lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1163
	}
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	return new_ndlp;
}

1167
/**
1168
 * lpfc_end_rscn - Check and handle more rscn for a vport
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 * @vport: pointer to a host virtual N_Port data structure.
 *
 * This routine checks whether more Registration State Change
 * Notifications (RSCNs) came in while the discovery state machine was in
 * the FC_RSCN_MODE. If so, the lpfc_els_handle_rscn() routine will be
 * invoked to handle the additional RSCNs for the @vport. Otherwise, the
 * FC_RSCN_MODE bit will be cleared with the @vport to mark as the end of
 * handling the RSCNs.
 **/
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void
lpfc_end_rscn(struct lpfc_vport *vport)
{
	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);

	if (vport->fc_flag & FC_RSCN_MODE) {
		/*
		 * Check to see if more RSCNs came in while we were
		 * processing this one.
		 */
		if (vport->fc_rscn_id_cnt ||
		    (vport->fc_flag & FC_RSCN_DISCOVERY) != 0)
			lpfc_els_handle_rscn(vport);
		else {
			spin_lock_irq(shost->host_lock);
			vport->fc_flag &= ~FC_RSCN_MODE;
			spin_unlock_irq(shost->host_lock);
		}
	}
}

1199
/**
1200
 * lpfc_cmpl_els_plogi - Completion callback function for plogi
1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218
 * @phba: pointer to lpfc hba data structure.
 * @cmdiocb: pointer to lpfc command iocb data structure.
 * @rspiocb: pointer to lpfc response iocb data structure.
 *
 * This routine is the completion callback function for issuing the Port
 * Login (PLOGI) command. For PLOGI completion, there must be an active
 * ndlp on the vport node list that matches the remote node ID from the
 * PLOGI reponse IOCB. If such ndlp does not exist, the PLOGI is simply
 * ignored and command IOCB released. The PLOGI response IOCB status is
 * checked for error conditons. If there is error status reported, PLOGI
 * retry shall be attempted by invoking the lpfc_els_retry() routine.
 * Otherwise, the lpfc_plogi_confirm_nport() routine shall be invoked on
 * the ndlp and the NLP_EVT_CMPL_PLOGI state to the Discover State Machine
 * (DSM) is set for this PLOGI completion. Finally, it checks whether
 * there are additional N_Port nodes with the vport that need to perform
 * PLOGI. If so, the lpfc_more_plogi() routine is invoked to issue addition
 * PLOGIs.
 **/
1219
static void
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lpfc_cmpl_els_plogi(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
		    struct lpfc_iocbq *rspiocb)
1222
{
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	struct lpfc_vport *vport = cmdiocb->vport;
	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
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	IOCB_t *irsp;
	struct lpfc_nodelist *ndlp;
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	struct lpfc_dmabuf *prsp;
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	int disc, rc, did, type;

	/* we pass cmdiocb to state machine which needs rspiocb as well */
	cmdiocb->context_un.rsp_iocb = rspiocb;

	irsp = &rspiocb->iocb;
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	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
		"PLOGI cmpl:      status:x%x/x%x did:x%x",
		irsp->ulpStatus, irsp->un.ulpWord[4],
		irsp->un.elsreq64.remoteID);

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	ndlp = lpfc_findnode_did(vport, irsp->un.elsreq64.remoteID);
1240
	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
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		lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
				 "0136 PLOGI completes to NPort x%x "
				 "with no ndlp. Data: x%x x%x x%x\n",
				 irsp->un.elsreq64.remoteID,
				 irsp->ulpStatus, irsp->un.ulpWord[4],
				 irsp->ulpIoTag);
1247
		goto out;
1248
	}
1249 1250 1251 1252

	/* Since ndlp can be freed in the disc state machine, note if this node
	 * is being used during discovery.
	 */
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	spin_lock_irq(shost->host_lock);
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	disc = (ndlp->nlp_flag & NLP_NPR_2B_DISC);
1255
	ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
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	spin_unlock_irq(shost->host_lock);
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	rc   = 0;

	/* PLOGI completes to NPort <nlp_DID> */
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	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
			 "0102 PLOGI completes to NPort x%x "
			 "Data: x%x x%x x%x x%x x%x\n",
			 ndlp->nlp_DID, irsp->ulpStatus, irsp->un.ulpWord[4],
			 irsp->ulpTimeout, disc, vport->num_disc_nodes);
1265
	/* Check to see if link went down during discovery */
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	if (lpfc_els_chk_latt(vport)) {
		spin_lock_irq(shost->host_lock);
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		ndlp->nlp_flag |= NLP_NPR_2B_DISC;
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		spin_unlock_irq(shost->host_lock);
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		goto out;
	}

	/* ndlp could be freed in DSM, save these values now */
	type = ndlp->nlp_type;
	did = ndlp->nlp_DID;

	if (irsp->ulpStatus) {
		/* Check for retry */
		if (lpfc_els_retry(phba, cmdiocb, rspiocb)) {
			/* ELS command is being retried */
			if (disc) {
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				spin_lock_irq(shost->host_lock);
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				ndlp->nlp_flag |= NLP_NPR_2B_DISC;
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				spin_unlock_irq(shost->host_lock);
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			}
			goto out;
		}
		/* PLOGI failed */
		/* Do not call DSM for lpfc_els_abort'ed ELS cmds */
1290
		if (lpfc_error_lost_link(irsp))
1291
			rc = NLP_STE_FREED_NODE;
1292
		else
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			rc = lpfc_disc_state_machine(vport, ndlp, cmdiocb,
1294
						     NLP_EVT_CMPL_PLOGI);
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	} else {
		/* Good status, call state machine */
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		prsp = list_entry(((struct lpfc_dmabuf *)
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				   cmdiocb->context2)->list.next,
				  struct lpfc_dmabuf, list);
		ndlp = lpfc_plogi_confirm_nport(phba, prsp->virt, ndlp);
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		rc = lpfc_disc_state_machine(vport, ndlp, cmdiocb,
1302
					     NLP_EVT_CMPL_PLOGI);
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	}

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	if (disc && vport->num_disc_nodes) {
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		/* Check to see if there are more PLOGIs to be sent */
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		lpfc_more_plogi(vport);
1308

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		if (vport->num_disc_nodes == 0) {
			spin_lock_irq(shost->host_lock);
			vport->fc_flag &= ~FC_NDISC_ACTIVE;
			spin_unlock_irq(shost->host_lock);
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			lpfc_can_disctmo(vport);
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			lpfc_end_rscn(vport);
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		}
	}

out:
	lpfc_els_free_iocb(phba, cmdiocb);
	return;
}

1324
/**
1325
 * lpfc_issue_els_plogi - Issue an plogi iocb command for a vport
1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344
 * @vport: pointer to a host virtual N_Port data structure.
 * @did: destination port identifier.
 * @retry: number of retries to the command IOCB.
 *
 * This routine issues a Port Login (PLOGI) command to a remote N_Port
 * (with the @did) for a @vport. Before issuing a PLOGI to a remote N_Port,
 * the ndlp with the remote N_Port DID must exist on the @vport's ndlp list.
 * This routine constructs the proper feilds of the PLOGI IOCB and invokes
 * the lpfc_sli_issue_iocb() routine to send out PLOGI ELS command.
 *
 * 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 PLOGI ELS command.
 *
 * Return code
 *   0 - Successfully issued a plogi for @vport
 *   1 - failed to issue a plogi for @vport
 **/
1345
int
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lpfc_issue_els_plogi(struct lpfc_vport *vport, uint32_t did, uint8_t retry)
1347
{
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	struct lpfc_hba  *phba = vport->phba;
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	struct serv_parm *sp;
	IOCB_t *icmd;
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	struct lpfc_nodelist *ndlp;
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	struct lpfc_iocbq *elsiocb;
	struct lpfc_sli_ring *pring;
	struct lpfc_sli *psli;
	uint8_t *pcmd;
	uint16_t cmdsize;
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	int ret;
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	psli = &phba->sli;
	pring = &psli->ring[LPFC_ELS_RING];	/* ELS ring */

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	ndlp = lpfc_findnode_did(vport, did);
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	if (ndlp && !NLP_CHK_NODE_ACT(ndlp))
		ndlp = NULL;
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	/* If ndlp is not NULL, we will bump the reference count on it */
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	cmdsize = (sizeof(uint32_t) + sizeof(struct serv_parm));
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	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp, did,
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				     ELS_CMD_PLOGI);
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	if (!elsiocb)
		return 1;
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	icmd = &elsiocb->iocb;
	pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);

	/* For PLOGI request, remainder of payload is service parameters */
	*((uint32_t *) (pcmd)) = ELS_CMD_PLOGI;
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	pcmd += sizeof(uint32_t);
	memcpy(pcmd, &vport->fc_sparam, sizeof(struct serv_parm));
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	sp = (struct serv_parm *) pcmd;

	if (sp->cmn.fcphLow < FC_PH_4_3)
		sp->cmn.fcphLow = FC_PH_4_3;

	if (sp->cmn.fcphHigh < FC_PH3)
		sp->cmn.fcphHigh = FC_PH3;

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	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
		"Issue PLOGI:     did:x%x",
		did, 0, 0);

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	phba->fc_stat.elsXmitPLOGI++;
	elsiocb->iocb_cmpl = lpfc_cmpl_els_plogi;
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	ret = lpfc_sli_issue_iocb(phba, pring, elsiocb, 0);

	if (ret == IOCB_ERROR) {
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		lpfc_els_free_iocb(phba, elsiocb);
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		return 1;
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	}
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	return 0;
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}

1403
/**
1404
 * lpfc_cmpl_els_prli - Completion callback function for prli
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 * @phba: pointer to lpfc hba data structure.
 * @cmdiocb: pointer to lpfc command iocb data structure.
 * @rspiocb: pointer to lpfc response iocb data structure.
 *
 * This routine is the completion callback function for a Process Login
 * (PRLI) ELS command. The PRLI response IOCB status is checked for error
 * status. If there is error status reported, PRLI retry shall be attempted
 * by invoking the lpfc_els_retry() routine. Otherwise, the state
 * NLP_EVT_CMPL_PRLI is sent to the Discover State Machine (DSM) for this
 * ndlp to mark the PRLI completion.
 **/
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static void
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lpfc_cmpl_els_prli(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
		   struct lpfc_iocbq *rspiocb)
1419
{
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	struct lpfc_vport *vport = cmdiocb->vport;
	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
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	IOCB_t *irsp;
	struct lpfc_sli *psli;
	struct lpfc_nodelist *ndlp;

	psli = &phba->sli;
	/* we pass cmdiocb to state machine which needs rspiocb as well */
	cmdiocb->context_un.rsp_iocb = rspiocb;

	irsp = &(rspiocb->iocb);
	ndlp = (struct lpfc_nodelist *) cmdiocb->context1;
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	spin_lock_irq(shost->host_lock);
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	ndlp->nlp_flag &= ~NLP_PRLI_SND;
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	spin_unlock_irq(shost->host_lock);
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	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
		"PRLI cmpl:       status:x%x/x%x did:x%x",
		irsp->ulpStatus, irsp->un.ulpWord[4],
		ndlp->nlp_DID);
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	/* PRLI completes to NPort <nlp_DID> */
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	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
			 "0103 PRLI completes to NPort x%x "
			 "Data: x%x x%x x%x x%x\n",
			 ndlp->nlp_DID, irsp->ulpStatus, irsp->un.ulpWord[4],
			 irsp->ulpTimeout, vport->num_disc_nodes);
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	vport->fc_prli_sent--;
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	/* Check to see if link went down during discovery */
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	if (lpfc_els_chk_latt(vport))
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		goto out;

	if (irsp->ulpStatus) {
		/* Check for retry */
		if (lpfc_els_retry(phba, cmdiocb, rspiocb)) {
			/* ELS command is being retried */
			goto out;
		}
		/* PRLI failed */
		/* Do not call DSM for lpfc_els_abort'ed ELS cmds */
1460
		if (lpfc_error_lost_link(irsp))
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			goto out;
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		else
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1463
			lpfc_disc_state_machine(vport, ndlp, cmdiocb,
1464
						NLP_EVT_CMPL_PRLI);
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	} else
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		/* Good status, call state machine */
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		lpfc_disc_state_machine(vport, ndlp, cmdiocb,
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					NLP_EVT_CMPL_PRLI);
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out:
	lpfc_els_free_iocb(phba, cmdiocb);
	return;
}

1474
/**
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 * lpfc_issue_els_prli - Issue a prli iocb command for a vport
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 * @vport: pointer to a host virtual N_Port data structure.
 * @ndlp: pointer to a node-list data structure.
 * @retry: number of retries to the command IOCB.
 *
 * This routine issues a Process Login (PRLI) ELS command for the
 * @vport. The PRLI service parameters are set up in the payload of the
 * PRLI Request command and the pointer to lpfc_cmpl_els_prli() routine
 * is put to the IOCB completion callback func field before invoking the
 * routine lpfc_sli_issue_iocb() to send out PRLI command.
 *
 * 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 PRLI ELS command.
 *
 * Return code
 *   0 - successfully issued prli iocb command for @vport
 *   1 - failed to issue prli iocb command for @vport
 **/
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int
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lpfc_issue_els_prli(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
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		    uint8_t retry)
{
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	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
	struct lpfc_hba *phba = vport->phba;
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	PRLI *npr;
	IOCB_t *icmd;
	struct lpfc_iocbq *elsiocb;
	struct lpfc_sli_ring *pring;
	struct lpfc_sli *psli;
	uint8_t *pcmd;
	uint16_t cmdsize;

	psli = &phba->sli;
	pring = &psli->ring[LPFC_ELS_RING];	/* ELS ring */

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	cmdsize = (sizeof(uint32_t) + sizeof(PRLI));
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	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
				     ndlp->nlp_DID, ELS_CMD_PRLI);
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	if (!elsiocb)
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		return 1;
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	icmd = &elsiocb->iocb;
	pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);

	/* For PRLI request, remainder of payload is service parameters */
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	memset(pcmd, 0, (sizeof(PRLI) + sizeof(uint32_t)));
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	*((uint32_t *) (pcmd)) = ELS_CMD_PRLI;
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	pcmd += sizeof(uint32_t);
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	/* For PRLI, remainder of payload is PRLI parameter page */
	npr = (PRLI *) pcmd;
	/*
	 * If our firmware version is 3.20 or later,
	 * set the following bits for FC-TAPE support.
	 */
	if (phba->vpd.rev.feaLevelHigh >= 0x02) {
		npr->ConfmComplAllowed = 1;
		npr->Retry = 1;
		npr->TaskRetryIdReq = 1;
	}
	npr->estabImagePair = 1;
	npr->readXferRdyDis = 1;

	/* For FCP support */
	npr->prliType = PRLI_FCP_TYPE;
	npr->initiatorFunc = 1;

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	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
		"Issue PRLI:      did:x%x",
		ndlp->nlp_DID, 0, 0);

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	phba->fc_stat.elsXmitPRLI++;
	elsiocb->iocb_cmpl = lpfc_cmpl_els_prli;
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1550
	spin_lock_irq(shost->host_lock);
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	ndlp->nlp_flag |= NLP_PRLI_SND;
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1552
	spin_unlock_irq(shost->host_lock);
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	if (lpfc_sli_issue_iocb(phba, pring, elsiocb, 0) == IOCB_ERROR) {
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1554
		spin_lock_irq(shost->host_lock);
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		ndlp->nlp_flag &= ~NLP_PRLI_SND;
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		spin_unlock_irq(shost->host_lock);
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		lpfc_els_free_iocb(phba, elsiocb);
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		return 1;
1559
	}
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	vport->fc_prli_sent++;
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	return 0;
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}

1564
/**
1565
 * lpfc_rscn_disc - Perform rscn discovery for a vport
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 * @vport: pointer to a host virtual N_Port data structure.
 *
 * This routine performs Registration State Change Notification (RSCN)
 * discovery for a @vport. If the @vport's node port recovery count is not
 * zero, it will invoke the lpfc_els_disc_plogi() to perform PLOGI for all
 * the nodes that need recovery. If none of the PLOGI were needed through
 * the lpfc_els_disc_plogi() routine, the lpfc_end_rscn() routine shall be
 * invoked to check and handle possible more RSCN came in during the period
 * of processing the current ones.
 **/
static void
lpfc_rscn_disc(struct lpfc_vport *vport)
{
	lpfc_can_disctmo(vport);

	/* RSCN discovery */
	/* go thru NPR nodes and issue ELS PLOGIs */
	if (vport->fc_npr_cnt)
		if (lpfc_els_disc_plogi(vport))
			return;

	lpfc_end_rscn(vport);
}

/**
1591
 * lpfc_adisc_done - Complete the adisc phase of discovery
1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640
 * @vport: pointer to lpfc_vport hba data structure that finished all ADISCs.
 *
 * This function is called when the final ADISC is completed during discovery.
 * This function handles clearing link attention or issuing reg_vpi depending
 * on whether npiv is enabled. This function also kicks off the PLOGI phase of
 * discovery.
 * This function is called with no locks held.
 **/
static void
lpfc_adisc_done(struct lpfc_vport *vport)
{
	struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
	struct lpfc_hba   *phba = vport->phba;

	/*
	 * For NPIV, cmpl_reg_vpi will set port_state to READY,
	 * and continue discovery.
	 */
	if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
	    !(vport->fc_flag & FC_RSCN_MODE)) {
		lpfc_issue_reg_vpi(phba, vport);
		return;
	}
	/*
	* For SLI2, we need to set port_state to READY
	* and continue discovery.
	*/
	if (vport->port_state < LPFC_VPORT_READY) {
		/* If we get here, there is nothing to ADISC */
		if (vport->port_type == LPFC_PHYSICAL_PORT)
			lpfc_issue_clear_la(phba, vport);
		if (!(vport->fc_flag & FC_ABORT_DISCOVERY)) {
			vport->num_disc_nodes = 0;
			/* go thru NPR list, issue ELS PLOGIs */
			if (vport->fc_npr_cnt)
				lpfc_els_disc_plogi(vport);
			if (!vport->num_disc_nodes) {
				spin_lock_irq(shost->host_lock);
				vport->fc_flag &= ~FC_NDISC_ACTIVE;
				spin_unlock_irq(shost->host_lock);
				lpfc_can_disctmo(vport);
				lpfc_end_rscn(vport);
			}
		}
		vport->port_state = LPFC_VPORT_READY;
	} else
		lpfc_rscn_disc(vport);
}

1641
/**
1642
 * lpfc_more_adisc - Issue more adisc as needed
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 * @vport: pointer to a host virtual N_Port data structure.
 *
 * This routine determines whether there are more ndlps on a @vport
 * node list need to have Address Discover (ADISC) issued. If so, it will
 * invoke the lpfc_els_disc_adisc() routine to issue ADISC on the @vport's
 * remaining nodes which need to have ADISC sent.
 **/
1650
void
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lpfc_more_adisc(struct lpfc_vport *vport)
1652 1653 1654
{
	int sentadisc;

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	if (vport->num_disc_nodes)
		vport->num_disc_nodes--;
1657
	/* Continue discovery with <num_disc_nodes> ADISCs to go */
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	lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
			 "0210 Continue discovery with %d ADISCs to go "
			 "Data: x%x x%x x%x\n",
			 vport->num_disc_nodes, vport->fc_adisc_cnt,
			 vport->fc_flag, vport->port_state);
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	/* Check to see if there are more ADISCs to be sent */
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	if (vport->fc_flag & FC_NLP_MORE) {
		lpfc_set_disctmo(vport);
		/* go thru NPR nodes and issue any remaining ELS ADISCs */
		sentadisc = lpfc_els_disc_adisc(vport);
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	}
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	if (!vport->num_disc_nodes)
		lpfc_adisc_done(vport);
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	return;
}

1674
/**
1675
 * lpfc_cmpl_els_adisc - Completion callback function for adisc
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 * @phba: pointer to lpfc hba data structure.
 * @cmdiocb: pointer to lpfc command iocb data structure.
 * @rspiocb: pointer to lpfc response iocb data structure.
 *
 * This routine is the completion function for issuing the Address Discover
 * (ADISC) command. It first checks to see whether link went down during
 * the discovery process. If so, the node will be marked as node port
 * recovery for issuing discover IOCB by the link attention handler and
 * exit. Otherwise, the response status is checked. If error was reported
 * in the response status, the ADISC command shall be retried by invoking
 * the lpfc_els_retry() routine. Otherwise, if no error was reported in
 * the response status, the state machine is invoked to set transition
 * with respect to NLP_EVT_CMPL_ADISC event.
 **/
1690
static void
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lpfc_cmpl_els_adisc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
		    struct lpfc_iocbq *rspiocb)
1693
{
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	struct lpfc_vport *vport = cmdiocb->vport;
	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
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	IOCB_t *irsp;
	struct lpfc_nodelist *ndlp;
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	int  disc;
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	/* we pass cmdiocb to state machine which needs rspiocb as well */
	cmdiocb->context_un.rsp_iocb = rspiocb;

	irsp = &(rspiocb->iocb);
	ndlp = (struct lpfc_nodelist *) cmdiocb->context1;

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	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
		"ADISC cmpl:      status:x%x/x%x did:x%x",
		irsp->ulpStatus, irsp->un.ulpWord[4],
		ndlp->nlp_DID);

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	/* Since ndlp can be freed in the disc state machine, note if this node
	 * is being used during discovery.
	 */
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	spin_lock_irq(shost->host_lock);
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	disc = (ndlp->nlp_flag & NLP_NPR_2B_DISC);
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	ndlp->nlp_flag &= ~(NLP_ADISC_SND | NLP_NPR_2B_DISC);
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1717
	spin_unlock_irq(shost->host_lock);
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	/* ADISC completes to NPort <nlp_DID> */
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	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
			 "0104 ADISC completes to NPort x%x "
			 "Data: x%x x%x x%x x%x x%x\n",
			 ndlp->nlp_DID, irsp->ulpStatus, irsp->un.ulpWord[4],
			 irsp->ulpTimeout, disc, vport->num_disc_nodes);
1724
	/* Check to see if link went down during discovery */
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	if (lpfc_els_chk_latt(vport)) {
		spin_lock_irq(shost->host_lock);
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		ndlp->nlp_flag |= NLP_NPR_2B_DISC;
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		spin_unlock_irq(shost->host_lock);
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		goto out;
	}

	if (irsp->ulpStatus) {
		/* Check for retry */
		if (lpfc_els_retry(phba, cmdiocb, rspiocb)) {
			/* ELS command is being retried */
			if (disc) {
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				spin_lock_irq(shost->host_lock);
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				ndlp->nlp_flag |= NLP_NPR_2B_DISC;
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				spin_unlock_irq(shost->host_lock);
				lpfc_set_disctmo(vport);
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			}
			goto out;
		}
		/* ADISC failed */
		/* Do not call DSM for lpfc_els_abort'ed ELS cmds */
1746
		if (!lpfc_error_lost_link(irsp))
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			lpfc_disc_state_machine(vport, ndlp, cmdiocb,
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1748
						NLP_EVT_CMPL_ADISC);
1749
	} else
1750
		/* Good status, call state machine */
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		lpfc_disc_state_machine(vport, ndlp, cmdiocb,
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					NLP_EVT_CMPL_ADISC);

1754 1755
	/* Check to see if there are more ADISCs to be sent */
	if (disc && vport->num_disc_nodes)
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		lpfc_more_adisc(vport);
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out:
	lpfc_els_free_iocb(phba, cmdiocb);
	return;
}

1762
/**
1763
 * lpfc_issue_els_adisc - Issue an address discover iocb to an node on a vport
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 * @vport: pointer to a virtual N_Port data structure.
 * @ndlp: pointer to a node-list data structure.
 * @retry: number of retries to the command IOCB.
 *
 * This routine issues an Address Discover (ADISC) for an @ndlp on a
 * @vport. It prepares the payload of the ADISC ELS command, updates the
 * and states of the ndlp, and invokes the lpfc_sli_issue_iocb() routine
 * to issue the ADISC ELS command.
 *
 * 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 ADISC ELS command.
 *
 * Return code
 *   0 - successfully issued adisc
 *   1 - failed to issue adisc
 **/
1782
int
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1783
lpfc_issue_els_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1784 1785
		     uint8_t retry)
{
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	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
	struct lpfc_hba  *phba = vport->phba;
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	ADISC *ap;
	IOCB_t *icmd;
	struct lpfc_iocbq *elsiocb;
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	struct lpfc_sli *psli = &phba->sli;
	struct lpfc_sli_ring *pring = &psli->ring[LPFC_ELS_RING];
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	uint8_t *pcmd;
	uint16_t cmdsize;

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	cmdsize = (sizeof(uint32_t) + sizeof(ADISC));
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	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
				     ndlp->nlp_DID, ELS_CMD_ADISC);
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	if (!elsiocb)
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		return 1;
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	icmd = &elsiocb->iocb;
	pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);

	/* For ADISC request, remainder of payload is service parameters */
	*((uint32_t *) (pcmd)) = ELS_CMD_ADISC;
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	pcmd += sizeof(uint32_t);
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	/* Fill in ADISC payload */
	ap = (ADISC *) pcmd;
	ap->hardAL_PA = phba->fc_pref_ALPA;
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	memcpy(&ap->portName, &vport->fc_portname, sizeof(struct lpfc_name));
	memcpy(&ap->nodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
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	ap->DID = be32_to_cpu(vport->fc_myDID);
1815

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	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
		"Issue ADISC:     did:x%x",
		ndlp->nlp_DID, 0, 0);

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	phba->fc_stat.elsXmitADISC++;
	elsiocb->iocb_cmpl = lpfc_cmpl_els_adisc;
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1822
	spin_lock_irq(shost->host_lock);
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	ndlp->nlp_flag |= NLP_ADISC_SND;
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1824
	spin_unlock_irq(shost->host_lock);
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	if (lpfc_sli_issue_iocb(phba, pring, elsiocb, 0) == IOCB_ERROR) {
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		spin_lock_irq(shost->host_lock);
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		ndlp->nlp_flag &= ~NLP_ADISC_SND;
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		spin_unlock_irq(shost->host_lock);
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		lpfc_els_free_iocb(phba, elsiocb);
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		return 1;
1831
	}
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	return 0;
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}

1835
/**
1836
 * lpfc_cmpl_els_logo - Completion callback function for logo
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 * @phba: pointer to lpfc hba data structure.
 * @cmdiocb: pointer to lpfc command iocb data structure.
 * @rspiocb: pointer to lpfc response iocb data structure.
 *
 * This routine is the completion function for issuing the ELS Logout (LOGO)
 * command. If no error status was reported from the LOGO response, the
 * state machine of the associated ndlp shall be invoked for transition with
 * respect to NLP_EVT_CMPL_LOGO event. Otherwise, if error status was reported,
 * the lpfc_els_retry() routine will be invoked to retry the LOGO command.
 **/
1847
static void
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lpfc_cmpl_els_logo(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
		   struct lpfc_iocbq *rspiocb)
1850
{
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	struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) cmdiocb->context1;
	struct lpfc_vport *vport = ndlp->vport;
	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
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	IOCB_t *irsp;
	struct lpfc_sli *psli;

	psli = &phba->sli;
	/* we pass cmdiocb to state machine which needs rspiocb as well */
	cmdiocb->context_un.rsp_iocb = rspiocb;

	irsp = &(rspiocb->iocb);
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1862
	spin_lock_irq(shost->host_lock);
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	ndlp->nlp_flag &= ~NLP_LOGO_SND;
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	spin_unlock_irq(shost->host_lock);
1865

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	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
		"LOGO cmpl:       status:x%x/x%x did:x%x",
		irsp->ulpStatus, irsp->un.ulpWord[4],
		ndlp->nlp_DID);
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	/* LOGO completes to NPort <nlp_DID> */
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	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
			 "0105 LOGO completes to NPort x%x "
			 "Data: x%x x%x x%x x%x\n",
			 ndlp->nlp_DID, irsp->ulpStatus, irsp->un.ulpWord[4],
			 irsp->ulpTimeout, vport->num_disc_nodes);
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	/* Check to see if link went down during discovery */
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	if (lpfc_els_chk_latt(vport))
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		goto out;

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	if (ndlp->nlp_flag & NLP_TARGET_REMOVE) {
	        /* NLP_EVT_DEVICE_RM should unregister the RPI
		 * which should abort all outstanding IOs.
		 */
		lpfc_disc_state_machine(vport, ndlp, cmdiocb,
					NLP_EVT_DEVICE_RM);
		goto out;
	}

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	if (irsp->ulpStatus) {
		/* Check for retry */
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		if (lpfc_els_retry(phba, cmdiocb, rspiocb))
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			/* ELS command is being retried */
			goto out;
		/* LOGO failed */
		/* Do not call DSM for lpfc_els_abort'ed ELS cmds */
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		if (lpfc_error_lost_link(irsp))
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			goto out;
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1898
		else
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			lpfc_disc_state_machine(vport, ndlp, cmdiocb,
1900
						NLP_EVT_CMPL_LOGO);
1901
	} else
1902 1903 1904
		/* Good status, call state machine.
		 * This will unregister the rpi if needed.
		 */
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1905
		lpfc_disc_state_machine(vport, ndlp, cmdiocb,
1906
					NLP_EVT_CMPL_LOGO);
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out:
	lpfc_els_free_iocb(phba, cmdiocb);
	return;
}

1912
/**
1913
 * lpfc_issue_els_logo - Issue a logo to an node on a vport
1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931
 * @vport: pointer to a virtual N_Port data structure.
 * @ndlp: pointer to a node-list data structure.
 * @retry: number of retries to the command IOCB.
 *
 * This routine constructs and issues an ELS Logout (LOGO) iocb command
 * to a remote node, referred by an @ndlp on a @vport. It constructs the
 * payload of the IOCB, properly sets up the @ndlp state, and invokes the
 * lpfc_sli_issue_iocb() routine to send out the LOGO ELS command.
 *
 * 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 LOGO ELS command.
 *
 * Return code
 *   0 - successfully issued logo
 *   1 - failed to issue logo
 **/
1932
int
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1933
lpfc_issue_els_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1934 1935
		    uint8_t retry)
{
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1936 1937
	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
	struct lpfc_hba  *phba = vport->phba;
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	IOCB_t *icmd;
	struct lpfc_iocbq *elsiocb;
	struct lpfc_sli_ring *pring;
	struct lpfc_sli *psli;
	uint8_t *pcmd;
	uint16_t cmdsize;
1944
	int rc;
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	psli = &phba->sli;
	pring = &psli->ring[LPFC_ELS_RING];

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	spin_lock_irq(shost->host_lock);
	if (ndlp->nlp_flag & NLP_LOGO_SND) {
		spin_unlock_irq(shost->host_lock);
		return 0;
	}
	spin_unlock_irq(shost->host_lock);

1956
	cmdsize = (2 * sizeof(uint32_t)) + sizeof(struct lpfc_name);
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1957 1958
	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
				     ndlp->nlp_DID, ELS_CMD_LOGO);
1959
	if (!elsiocb)
1960
		return 1;
1961 1962 1963 1964

	icmd = &elsiocb->iocb;
	pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
	*((uint32_t *) (pcmd)) = ELS_CMD_LOGO;
1965
	pcmd += sizeof(uint32_t);
1966 1967

	/* Fill in LOGO payload */
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1968
	*((uint32_t *) (pcmd)) = be32_to_cpu(vport->fc_myDID);
1969 1970
	pcmd += sizeof(uint32_t);
	memcpy(pcmd, &vport->fc_portname, sizeof(struct lpfc_name));
1971

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1972 1973 1974 1975
	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
		"Issue LOGO:      did:x%x",
		ndlp->nlp_DID, 0, 0);

1976 1977
	phba->fc_stat.elsXmitLOGO++;
	elsiocb->iocb_cmpl = lpfc_cmpl_els_logo;
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1978
	spin_lock_irq(shost->host_lock);
1979
	ndlp->nlp_flag |= NLP_LOGO_SND;
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1980
	spin_unlock_irq(shost->host_lock);
1981 1982 1983
	rc = lpfc_sli_issue_iocb(phba, pring, elsiocb, 0);

	if (rc == IOCB_ERROR) {
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1984
		spin_lock_irq(shost->host_lock);
1985
		ndlp->nlp_flag &= ~NLP_LOGO_SND;
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1986
		spin_unlock_irq(shost->host_lock);
1987
		lpfc_els_free_iocb(phba, elsiocb);
1988
		return 1;
1989
	}
1990
	return 0;
1991 1992
}

1993
/**
1994
 * lpfc_cmpl_els_cmd - Completion callback function for generic els command
1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008
 * @phba: pointer to lpfc hba data structure.
 * @cmdiocb: pointer to lpfc command iocb data structure.
 * @rspiocb: pointer to lpfc response iocb data structure.
 *
 * This routine is a generic completion callback function for ELS commands.
 * Specifically, it is the callback function which does not need to perform
 * any command specific operations. It is currently used by the ELS command
 * issuing routines for the ELS State Change  Request (SCR),
 * lpfc_issue_els_scr(), and the ELS Fibre Channel Address Resolution
 * Protocol Response (FARPR) routine, lpfc_issue_els_farpr(). Other than
 * certain debug loggings, this callback function simply invokes the
 * lpfc_els_chk_latt() routine to check whether link went down during the
 * discovery process.
 **/
2009
static void
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2010 2011
lpfc_cmpl_els_cmd(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
		  struct lpfc_iocbq *rspiocb)
2012
{
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2013
	struct lpfc_vport *vport = cmdiocb->vport;
2014 2015 2016 2017
	IOCB_t *irsp;

	irsp = &rspiocb->iocb;

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2018 2019 2020 2021
	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
		"ELS cmd cmpl:    status:x%x/x%x did:x%x",
		irsp->ulpStatus, irsp->un.ulpWord[4],
		irsp->un.elsreq64.remoteID);
2022
	/* ELS cmd tag <ulpIoTag> completes */
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	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
			 "0106 ELS cmd tag x%x completes Data: x%x x%x x%x\n",
			 irsp->ulpIoTag, irsp->ulpStatus,
			 irsp->un.ulpWord[4], irsp->ulpTimeout);
2027
	/* Check to see if link went down during discovery */
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2028
	lpfc_els_chk_latt(vport);
2029 2030 2031 2032
	lpfc_els_free_iocb(phba, cmdiocb);
	return;
}

2033
/**
2034
 * lpfc_issue_els_scr - Issue a scr to an node on a vport
2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054
 * @vport: pointer to a host virtual N_Port data structure.
 * @nportid: N_Port identifier to the remote node.
 * @retry: number of retries to the command IOCB.
 *
 * This routine issues a State Change Request (SCR) to a fabric node
 * on a @vport. The remote node @nportid is passed into the function. It
 * first search the @vport node list to find the matching ndlp. If no such
 * ndlp is found, a new ndlp shall be created for this (SCR) purpose. An
 * IOCB is allocated, payload prepared, and the lpfc_sli_issue_iocb()
 * routine is invoked to send the SCR IOCB.
 *
 * 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 SCR ELS command.
 *
 * Return code
 *   0 - Successfully issued scr command
 *   1 - Failed to issue scr command
 **/
2055
int
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2056
lpfc_issue_els_scr(struct lpfc_vport *vport, uint32_t nportid, uint8_t retry)
2057
{
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2058
	struct lpfc_hba  *phba = vport->phba;
2059 2060 2061 2062 2063 2064 2065 2066 2067 2068
	IOCB_t *icmd;
	struct lpfc_iocbq *elsiocb;
	struct lpfc_sli_ring *pring;
	struct lpfc_sli *psli;
	uint8_t *pcmd;
	uint16_t cmdsize;
	struct lpfc_nodelist *ndlp;

	psli = &phba->sli;
	pring = &psli->ring[LPFC_ELS_RING];	/* ELS ring */
2069
	cmdsize = (sizeof(uint32_t) + sizeof(SCR));
2070

2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082
	ndlp = lpfc_findnode_did(vport, nportid);
	if (!ndlp) {
		ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
		if (!ndlp)
			return 1;
		lpfc_nlp_init(vport, ndlp, nportid);
		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;
	}
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2083 2084 2085

	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
				     ndlp->nlp_DID, ELS_CMD_SCR);
2086

2087
	if (!elsiocb) {
2088 2089 2090
		/* This will trigger the release of the node just
		 * allocated
		 */
2091
		lpfc_nlp_put(ndlp);
2092
		return 1;
2093 2094 2095 2096 2097 2098
	}

	icmd = &elsiocb->iocb;
	pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);

	*((uint32_t *) (pcmd)) = ELS_CMD_SCR;
2099
	pcmd += sizeof(uint32_t);
2100 2101

	/* For SCR, remainder of payload is SCR parameter page */
2102
	memset(pcmd, 0, sizeof(SCR));
2103 2104
	((SCR *) pcmd)->Function = SCR_FUNC_FULL;

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2105 2106 2107 2108
	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
		"Issue SCR:       did:x%x",
		ndlp->nlp_DID, 0, 0);

2109 2110 2111
	phba->fc_stat.elsXmitSCR++;
	elsiocb->iocb_cmpl = lpfc_cmpl_els_cmd;
	if (lpfc_sli_issue_iocb(phba, pring, elsiocb, 0) == IOCB_ERROR) {
2112 2113 2114 2115
		/* The additional lpfc_nlp_put will cause the following
		 * lpfc_els_free_iocb routine to trigger the rlease of
		 * the node.
		 */
2116
		lpfc_nlp_put(ndlp);
2117
		lpfc_els_free_iocb(phba, elsiocb);
2118
		return 1;
2119
	}
2120 2121 2122
	/* This will cause the callback-function lpfc_cmpl_els_cmd to
	 * trigger the release of node.
	 */
2123
	lpfc_nlp_put(ndlp);
2124
	return 0;
2125 2126
}

2127
/**
2128
 * lpfc_issue_els_farpr - Issue a farp to an node on a vport
2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148
 * @vport: pointer to a host virtual N_Port data structure.
 * @nportid: N_Port identifier to the remote node.
 * @retry: number of retries to the command IOCB.
 *
 * This routine issues a Fibre Channel Address Resolution Response
 * (FARPR) to a node on a vport. The remote node N_Port identifier (@nportid)
 * is passed into the function. It first search the @vport node list to find
 * the matching ndlp. If no such ndlp is found, a new ndlp shall be created
 * for this (FARPR) purpose. An IOCB is allocated, payload prepared, and the
 * lpfc_sli_issue_iocb() routine is invoked to send the FARPR ELS command.
 *
 * 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 PARPR ELS command.
 *
 * Return code
 *   0 - Successfully issued farpr command
 *   1 - Failed to issue farpr command
 **/
2149
static int
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2150
lpfc_issue_els_farpr(struct lpfc_vport *vport, uint32_t nportid, uint8_t retry)
2151
{
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2152
	struct lpfc_hba  *phba = vport->phba;
2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165
	IOCB_t *icmd;
	struct lpfc_iocbq *elsiocb;
	struct lpfc_sli_ring *pring;
	struct lpfc_sli *psli;
	FARP *fp;
	uint8_t *pcmd;
	uint32_t *lp;
	uint16_t cmdsize;
	struct lpfc_nodelist *ondlp;
	struct lpfc_nodelist *ndlp;

	psli = &phba->sli;
	pring = &psli->ring[LPFC_ELS_RING];	/* ELS ring */
2166
	cmdsize = (sizeof(uint32_t) + sizeof(FARP));
2167

2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179
	ndlp = lpfc_findnode_did(vport, nportid);
	if (!ndlp) {
		ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
		if (!ndlp)
			return 1;
		lpfc_nlp_init(vport, ndlp, nportid);
		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;
	}
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2180 2181 2182

	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
				     ndlp->nlp_DID, ELS_CMD_RNID);
2183
	if (!elsiocb) {
2184 2185 2186
		/* This will trigger the release of the node just
		 * allocated
		 */
2187
		lpfc_nlp_put(ndlp);
2188
		return 1;
2189 2190 2191 2192 2193 2194
	}

	icmd = &elsiocb->iocb;
	pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);

	*((uint32_t *) (pcmd)) = ELS_CMD_FARPR;
2195
	pcmd += sizeof(uint32_t);
2196 2197 2198

	/* Fill in FARPR payload */
	fp = (FARP *) (pcmd);
2199
	memset(fp, 0, sizeof(FARP));
2200 2201
	lp = (uint32_t *) pcmd;
	*lp++ = be32_to_cpu(nportid);
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2202
	*lp++ = be32_to_cpu(vport->fc_myDID);
2203 2204 2205
	fp->Rflags = 0;
	fp->Mflags = (FARP_MATCH_PORT | FARP_MATCH_NODE);

2206 2207
	memcpy(&fp->RportName, &vport->fc_portname, sizeof(struct lpfc_name));
	memcpy(&fp->RnodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
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2208
	ondlp = lpfc_findnode_did(vport, nportid);
2209
	if (ondlp && NLP_CHK_NODE_ACT(ondlp)) {
2210
		memcpy(&fp->OportName, &ondlp->nlp_portname,
2211
		       sizeof(struct lpfc_name));
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		memcpy(&fp->OnodeName, &ondlp->nlp_nodename,
2213
		       sizeof(struct lpfc_name));
2214 2215
	}

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	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
		"Issue FARPR:     did:x%x",
		ndlp->nlp_DID, 0, 0);

2220 2221 2222
	phba->fc_stat.elsXmitFARPR++;
	elsiocb->iocb_cmpl = lpfc_cmpl_els_cmd;
	if (lpfc_sli_issue_iocb(phba, pring, elsiocb, 0) == IOCB_ERROR) {
2223 2224 2225 2226
		/* The additional lpfc_nlp_put will cause the following
		 * lpfc_els_free_iocb routine to trigger the release of
		 * the node.
		 */
2227
		lpfc_nlp_put(ndlp);
2228
		lpfc_els_free_iocb(phba, elsiocb);
2229
		return 1;
2230
	}
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	/* This will cause the callback-function lpfc_cmpl_els_cmd to
	 * trigger the release of the node.
	 */
2234
	lpfc_nlp_put(ndlp);
2235
	return 0;
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}

2238
/**
2239
 * lpfc_cancel_retry_delay_tmo - Cancel the timer with delayed iocb-cmd retry
2240 2241 2242 2243 2244 2245 2246 2247 2248 2249
 * @vport: pointer to a host virtual N_Port data structure.
 * @nlp: pointer to a node-list data structure.
 *
 * This routine cancels the timer with a delayed IOCB-command retry for
 * a @vport's @ndlp. It stops the timer for the delayed function retrial and
 * removes the ELS retry event if it presents. In addition, if the
 * NLP_NPR_2B_DISC bit is set in the @nlp's nlp_flag bitmap, ADISC IOCB
 * commands are sent for the @vport's nodes that require issuing discovery
 * ADISC.
 **/
2250
void
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2251
lpfc_cancel_retry_delay_tmo(struct lpfc_vport *vport, struct lpfc_nodelist *nlp)
2252
{
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2253
	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2254
	struct lpfc_work_evt *evtp;
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2255

2256 2257
	if (!(nlp->nlp_flag & NLP_DELAY_TMO))
		return;
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2258
	spin_lock_irq(shost->host_lock);
2259
	nlp->nlp_flag &= ~NLP_DELAY_TMO;
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2260
	spin_unlock_irq(shost->host_lock);
2261 2262
	del_timer_sync(&nlp->nlp_delayfunc);
	nlp->nlp_last_elscmd = 0;
2263
	if (!list_empty(&nlp->els_retry_evt.evt_listp)) {
2264
		list_del_init(&nlp->els_retry_evt.evt_listp);
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		/* Decrement nlp reference count held for the delayed retry */
		evtp = &nlp->els_retry_evt;
		lpfc_nlp_put((struct lpfc_nodelist *)evtp->evt_arg1);
	}
2269
	if (nlp->nlp_flag & NLP_NPR_2B_DISC) {
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2270
		spin_lock_irq(shost->host_lock);
2271
		nlp->nlp_flag &= ~NLP_NPR_2B_DISC;
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2272 2273
		spin_unlock_irq(shost->host_lock);
		if (vport->num_disc_nodes) {
2274 2275 2276 2277 2278 2279
			if (vport->port_state < LPFC_VPORT_READY) {
				/* Check if there are more ADISCs to be sent */
				lpfc_more_adisc(vport);
			} else {
				/* Check if there are more PLOGIs to be sent */
				lpfc_more_plogi(vport);
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				if (vport->num_disc_nodes == 0) {
					spin_lock_irq(shost->host_lock);
					vport->fc_flag &= ~FC_NDISC_ACTIVE;
					spin_unlock_irq(shost->host_lock);
					lpfc_can_disctmo(vport);
					lpfc_end_rscn(vport);
				}
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			}
		}
	}
	return;
}

2293
/**
2294
 * lpfc_els_retry_delay - Timer function with a ndlp delayed function timer
2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306
 * @ptr: holder for the pointer to the timer function associated data (ndlp).
 *
 * This routine is invoked by the ndlp delayed-function timer to check
 * whether there is any pending ELS retry event(s) with the node. If not, it
 * simply returns. Otherwise, if there is at least one ELS delayed event, it
 * adds the delayed events to the HBA work list and invokes the
 * lpfc_worker_wake_up() routine to wake up worker thread to process the
 * event. Note that lpfc_nlp_get() is called before posting the event to
 * the work list to hold reference count of ndlp so that it guarantees the
 * reference to ndlp will still be available when the worker thread gets
 * to the event associated with the ndlp.
 **/
2307 2308 2309
void
lpfc_els_retry_delay(unsigned long ptr)
{
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	struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) ptr;
	struct lpfc_vport *vport = ndlp->vport;
	struct lpfc_hba   *phba = vport->phba;
2313
	unsigned long flags;
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2314
	struct lpfc_work_evt  *evtp = &ndlp->els_retry_evt;
2315

2316
	spin_lock_irqsave(&phba->hbalock, flags);
2317
	if (!list_empty(&evtp->evt_listp)) {
2318
		spin_unlock_irqrestore(&phba->hbalock, flags);
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		return;
	}

2322 2323 2324 2325
	/* We need to hold the node by incrementing the reference
	 * count until the queued work is done
	 */
	evtp->evt_arg1  = lpfc_nlp_get(ndlp);
2326 2327 2328
	if (evtp->evt_arg1) {
		evtp->evt = LPFC_EVT_ELS_RETRY;
		list_add_tail(&evtp->evt_listp, &phba->work_list);
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		lpfc_worker_wake_up(phba);
2330
	}
2331
	spin_unlock_irqrestore(&phba->hbalock, flags);
2332 2333 2334
	return;
}

2335
/**
2336
 * lpfc_els_retry_delay_handler - Work thread handler for ndlp delayed function
2337 2338 2339 2340 2341 2342 2343
 * @ndlp: pointer to a node-list data structure.
 *
 * This routine is the worker-thread handler for processing the @ndlp delayed
 * event(s), posted by the lpfc_els_retry_delay() routine. It simply retrieves
 * the last ELS command from the associated ndlp and invokes the proper ELS
 * function according to the delayed ELS command to retry the command.
 **/
2344 2345 2346
void
lpfc_els_retry_delay_handler(struct lpfc_nodelist *ndlp)
{
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	struct lpfc_vport *vport = ndlp->vport;
	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
	uint32_t cmd, did, retry;
2350

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2351
	spin_lock_irq(shost->host_lock);
2352 2353 2354
	did = ndlp->nlp_DID;
	cmd = ndlp->nlp_last_elscmd;
	ndlp->nlp_last_elscmd = 0;
2355 2356

	if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
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2357
		spin_unlock_irq(shost->host_lock);
2358 2359 2360 2361
		return;
	}

	ndlp->nlp_flag &= ~NLP_DELAY_TMO;
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2362
	spin_unlock_irq(shost->host_lock);
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	/*
	 * If a discovery event readded nlp_delayfunc after timer
	 * firing and before processing the timer, cancel the
	 * nlp_delayfunc.
	 */
	del_timer_sync(&ndlp->nlp_delayfunc);
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	retry = ndlp->nlp_retry;

	switch (cmd) {
	case ELS_CMD_FLOGI:
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		lpfc_issue_els_flogi(vport, ndlp, retry);
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		break;
	case ELS_CMD_PLOGI:
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		if (!lpfc_issue_els_plogi(vport, ndlp->nlp_DID, retry)) {
2377
			ndlp->nlp_prev_state = ndlp->nlp_state;
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			lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
2379
		}
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		break;
	case ELS_CMD_ADISC:
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		if (!lpfc_issue_els_adisc(vport, ndlp, retry)) {
2383
			ndlp->nlp_prev_state = ndlp->nlp_state;
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			lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
2385
		}
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		break;
	case ELS_CMD_PRLI:
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		if (!lpfc_issue_els_prli(vport, ndlp, retry)) {
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			ndlp->nlp_prev_state = ndlp->nlp_state;
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			lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
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		}
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		break;
	case ELS_CMD_LOGO:
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		if (!lpfc_issue_els_logo(vport, ndlp, retry)) {
2395
			ndlp->nlp_prev_state = ndlp->nlp_state;
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			lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
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		}
2398
		break;
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	case ELS_CMD_FDISC:
		lpfc_issue_els_fdisc(vport, ndlp, retry);
		break;
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	}
	return;
}

2406
/**
2407
 * lpfc_els_retry - Make retry decision on an els command iocb
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 * @phba: pointer to lpfc hba data structure.
 * @cmdiocb: pointer to lpfc command iocb data structure.
 * @rspiocb: pointer to lpfc response iocb data structure.
 *
 * This routine makes a retry decision on an ELS command IOCB, which has
 * failed. The following ELS IOCBs use this function for retrying the command
 * when previously issued command responsed with error status: FLOGI, PLOGI,
 * PRLI, ADISC, LOGO, and FDISC. Based on the ELS command type and the
 * returned error status, it makes the decision whether a retry shall be
 * issued for the command, and whether a retry shall be made immediately or
 * delayed. In the former case, the corresponding ELS command issuing-function
 * is called to retry the command. In the later case, the ELS command shall
 * be posted to the ndlp delayed event and delayed function timer set to the
 * ndlp for the delayed command issusing.
 *
 * Return code
 *   0 - No retry of els command is made
 *   1 - Immediate or delayed retry of els command is made
 **/
2427
static int
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lpfc_els_retry(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
	       struct lpfc_iocbq *rspiocb)
2430
{
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	struct lpfc_vport *vport = cmdiocb->vport;
	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
	IOCB_t *irsp = &rspiocb->iocb;
	struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) cmdiocb->context1;
	struct lpfc_dmabuf *pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
2436 2437
	uint32_t *elscmd;
	struct ls_rjt stat;
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	int retry = 0, maxretry = lpfc_max_els_tries, delay = 0;
2439
	int logerr = 0;
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	uint32_t cmd = 0;
2441
	uint32_t did;
2442

2443

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	/* Note: context2 may be 0 for internal driver abort
	 * of delays ELS command.
	 */

	if (pcmd && pcmd->virt) {
		elscmd = (uint32_t *) (pcmd->virt);
		cmd = *elscmd++;
	}

2453
	if (ndlp && NLP_CHK_NODE_ACT(ndlp))
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		did = ndlp->nlp_DID;
	else {
		/* We should only hit this case for retrying PLOGI */
		did = irsp->un.elsreq64.remoteID;
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		ndlp = lpfc_findnode_did(vport, did);
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		if ((!ndlp || !NLP_CHK_NODE_ACT(ndlp))
		    && (cmd != ELS_CMD_PLOGI))
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			return 1;
	}

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	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
		"Retry ELS:       wd7:x%x wd4:x%x did:x%x",
		*(((uint32_t *) irsp) + 7), irsp->un.ulpWord[4], ndlp->nlp_DID);

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	switch (irsp->ulpStatus) {
	case IOSTAT_FCP_RSP_ERROR:
	case IOSTAT_REMOTE_STOP:
		break;

	case IOSTAT_LOCAL_REJECT:
		switch ((irsp->un.ulpWord[4] & 0xff)) {
		case IOERR_LOOP_OPEN_FAILURE:
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			if (cmd == ELS_CMD_FLOGI) {
				if (PCI_DEVICE_ID_HORNET ==
					phba->pcidev->device) {
					phba->fc_topology = TOPOLOGY_LOOP;
					phba->pport->fc_myDID = 0;
					phba->alpa_map[0] = 0;
					phba->alpa_map[1] = 0;
				}
			}
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2485
			if (cmd == ELS_CMD_PLOGI && cmdiocb->retry == 0)
2486
				delay = 1000;
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			retry = 1;
			break;

2490
		case IOERR_ILLEGAL_COMMAND:
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			lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
					 "0124 Retry illegal cmd x%x "
					 "retry:x%x delay:x%x\n",
					 cmd, cmdiocb->retry, delay);
			retry = 1;
			/* All command's retry policy */
			maxretry = 8;
			if (cmdiocb->retry > 2)
				delay = 1000;
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			break;

2502
		case IOERR_NO_RESOURCES:
2503
			logerr = 1; /* HBA out of resources */
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			retry = 1;
			if (cmdiocb->retry > 100)
				delay = 100;
			maxretry = 250;
			break;

		case IOERR_ILLEGAL_FRAME:
2511
			delay = 100;
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			retry = 1;
			break;

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		case IOERR_SEQUENCE_TIMEOUT:
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		case IOERR_INVALID_RPI:
			retry = 1;
			break;
		}
		break;

	case IOSTAT_NPORT_RJT:
	case IOSTAT_FABRIC_RJT:
		if (irsp->un.ulpWord[4] & RJT_UNAVAIL_TEMP) {
			retry = 1;
			break;
		}
		break;

	case IOSTAT_NPORT_BSY:
	case IOSTAT_FABRIC_BSY:
2532
		logerr = 1; /* Fabric / Remote NPort out of resources */
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		retry = 1;
		break;

	case IOSTAT_LS_RJT:
		stat.un.lsRjtError = be32_to_cpu(irsp->un.ulpWord[4]);
		/* Added for Vendor specifc support
		 * Just keep retrying for these Rsn / Exp codes
		 */
		switch (stat.un.b.lsRjtRsnCode) {
		case LSRJT_UNABLE_TPC:
			if (stat.un.b.lsRjtRsnCodeExp ==
			    LSEXP_CMD_IN_PROGRESS) {
				if (cmd == ELS_CMD_PLOGI) {
2546
					delay = 1000;
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					maxretry = 48;
				}
				retry = 1;
				break;
			}
			if (cmd == ELS_CMD_PLOGI) {
2553
				delay = 1000;
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				maxretry = lpfc_max_els_tries + 1;
				retry = 1;
				break;
			}
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			if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
			  (cmd == ELS_CMD_FDISC) &&
			  (stat.un.b.lsRjtRsnCodeExp == LSEXP_OUT_OF_RESOURCE)){
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				lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
						 "0125 FDISC Failed (x%x). "
						 "Fabric out of resources\n",
						 stat.un.lsRjtError);
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				lpfc_vport_set_state(vport,
						     FC_VPORT_NO_FABRIC_RSCS);
			}
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			break;

		case LSRJT_LOGICAL_BSY:
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			if ((cmd == ELS_CMD_PLOGI) ||
			    (cmd == ELS_CMD_PRLI)) {
2573
				delay = 1000;
2574
				maxretry = 48;
2575
			} else if (cmd == ELS_CMD_FDISC) {
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				/* FDISC retry policy */
				maxretry = 48;
				if (cmdiocb->retry >= 32)
					delay = 1000;
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			}
			retry = 1;
			break;
2583 2584

		case LSRJT_LOGICAL_ERR:
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			/* There are some cases where switches return this
			 * error when they are not ready and should be returning
			 * Logical Busy. We should delay every time.
			 */
			if (cmd == ELS_CMD_FDISC &&
			    stat.un.b.lsRjtRsnCodeExp == LSEXP_PORT_LOGIN_REQ) {
				maxretry = 3;
				delay = 1000;
				retry = 1;
				break;
			}
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		case LSRJT_PROTOCOL_ERR:
			if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
			  (cmd == ELS_CMD_FDISC) &&
			  ((stat.un.b.lsRjtRsnCodeExp == LSEXP_INVALID_PNAME) ||
			  (stat.un.b.lsRjtRsnCodeExp == LSEXP_INVALID_NPORT_ID))
			  ) {
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				lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
2603
						 "0122 FDISC Failed (x%x). "
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						 "Fabric Detected Bad WWN\n",
						 stat.un.lsRjtError);
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				lpfc_vport_set_state(vport,
						     FC_VPORT_FABRIC_REJ_WWN);
			}
			break;
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		}
		break;

	case IOSTAT_INTERMED_RSP:
	case IOSTAT_BA_RJT:
		break;

	default:
		break;
	}

2621
	if (did == FDMI_DID)
2622 2623
		retry = 1;

2624
	if ((cmd == ELS_CMD_FLOGI) &&
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	    (phba->fc_topology != TOPOLOGY_LOOP) &&
	    !lpfc_error_lost_link(irsp)) {
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		/* FLOGI retry policy */
		retry = 1;
		maxretry = 48;
		if (cmdiocb->retry >= 32)
			delay = 1000;
	}

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	if ((++cmdiocb->retry) >= maxretry) {
		phba->fc_stat.elsRetryExceeded++;
		retry = 0;
	}

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	if ((vport->load_flag & FC_UNLOADING) != 0)
		retry = 0;

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	if (retry) {

		/* Retry ELS command <elsCmd> to remote NPORT <did> */
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		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
				 "0107 Retry ELS command x%x to remote "
				 "NPORT x%x Data: x%x x%x\n",
				 cmd, did, cmdiocb->retry, delay);
2649

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		if (((cmd == ELS_CMD_PLOGI) || (cmd == ELS_CMD_ADISC)) &&
			((irsp->ulpStatus != IOSTAT_LOCAL_REJECT) ||
			((irsp->un.ulpWord[4] & 0xff) != IOERR_NO_RESOURCES))) {
			/* Don't reset timer for no resources */

2655
			/* If discovery / RSCN timer is running, reset it */
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			if (timer_pending(&vport->fc_disctmo) ||
2657
			    (vport->fc_flag & FC_RSCN_MODE))
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				lpfc_set_disctmo(vport);
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		}

		phba->fc_stat.elsXmitRetry++;
2662
		if (ndlp && NLP_CHK_NODE_ACT(ndlp) && delay) {
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			phba->fc_stat.elsDelayRetry++;
			ndlp->nlp_retry = cmdiocb->retry;

2666 2667 2668
			/* delay is specified in milliseconds */
			mod_timer(&ndlp->nlp_delayfunc,
				jiffies + msecs_to_jiffies(delay));
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			spin_lock_irq(shost->host_lock);
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			ndlp->nlp_flag |= NLP_DELAY_TMO;
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			spin_unlock_irq(shost->host_lock);
2672

2673
			ndlp->nlp_prev_state = ndlp->nlp_state;
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			if (cmd == ELS_CMD_PRLI)
				lpfc_nlp_set_state(vport, ndlp,
					NLP_STE_REG_LOGIN_ISSUE);
			else
				lpfc_nlp_set_state(vport, ndlp,
					NLP_STE_NPR_NODE);
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			ndlp->nlp_last_elscmd = cmd;

2682
			return 1;
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		}
		switch (cmd) {
		case ELS_CMD_FLOGI:
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			lpfc_issue_els_flogi(vport, ndlp, cmdiocb->retry);
2687
			return 1;
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		case ELS_CMD_FDISC:
			lpfc_issue_els_fdisc(vport, ndlp, cmdiocb->retry);
			return 1;
2691
		case ELS_CMD_PLOGI:
2692
			if (ndlp && NLP_CHK_NODE_ACT(ndlp)) {
2693
				ndlp->nlp_prev_state = ndlp->nlp_state;
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				lpfc_nlp_set_state(vport, ndlp,
2695
						   NLP_STE_PLOGI_ISSUE);
2696
			}
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			lpfc_issue_els_plogi(vport, did, cmdiocb->retry);
2698
			return 1;
2699
		case ELS_CMD_ADISC:
2700
			ndlp->nlp_prev_state = ndlp->nlp_state;
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			lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
			lpfc_issue_els_adisc(vport, ndlp, cmdiocb->retry);
2703
			return 1;
2704
		case ELS_CMD_PRLI:
2705
			ndlp->nlp_prev_state = ndlp->nlp_state;
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			lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
			lpfc_issue_els_prli(vport, ndlp, cmdiocb->retry);
2708
			return 1;
2709
		case ELS_CMD_LOGO:
2710
			ndlp->nlp_prev_state = ndlp->nlp_state;
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			lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
			lpfc_issue_els_logo(vport, ndlp, cmdiocb->retry);
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			return 1;
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		}
	}
	/* No retry ELS command <elsCmd> to remote NPORT <did> */
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	if (logerr) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
			 "0137 No retry ELS command x%x to remote "
			 "NPORT x%x: Out of Resources: Error:x%x/%x\n",
			 cmd, did, irsp->ulpStatus,
			 irsp->un.ulpWord[4]);
	}
	else {
		lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
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			 "0108 No retry ELS command x%x to remote "
			 "NPORT x%x Retried:%d Error:x%x/%x\n",
			 cmd, did, cmdiocb->retry, irsp->ulpStatus,
			 irsp->un.ulpWord[4]);
2730
	}
2731
	return 0;
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}

2734
/**
2735
 * lpfc_els_free_data - Free lpfc dma buffer and data structure with an iocb
2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747
 * @phba: pointer to lpfc hba data structure.
 * @buf_ptr1: pointer to the lpfc DMA buffer data structure.
 *
 * This routine releases the lpfc DMA (Direct Memory Access) buffer(s)
 * associated with a command IOCB back to the lpfc DMA buffer pool. It first
 * checks to see whether there is a lpfc DMA buffer associated with the
 * response of the command IOCB. If so, it will be released before releasing
 * the lpfc DMA buffer associated with the IOCB itself.
 *
 * Return code
 *   0 - Successfully released lpfc DMA buffer (currently, always return 0)
 **/
2748
static int
2749 2750 2751 2752
lpfc_els_free_data(struct lpfc_hba *phba, struct lpfc_dmabuf *buf_ptr1)
{
	struct lpfc_dmabuf *buf_ptr;

2753
	/* Free the response before processing the command. */
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	if (!list_empty(&buf_ptr1->list)) {
		list_remove_head(&buf_ptr1->list, buf_ptr,
				 struct lpfc_dmabuf,
				 list);
		lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
		kfree(buf_ptr);
	}
	lpfc_mbuf_free(phba, buf_ptr1->virt, buf_ptr1->phys);
	kfree(buf_ptr1);
	return 0;
}

2766
/**
2767
 * lpfc_els_free_bpl - Free lpfc dma buffer and data structure with bpl
2768 2769 2770 2771 2772 2773 2774 2775 2776 2777
 * @phba: pointer to lpfc hba data structure.
 * @buf_ptr: pointer to the lpfc dma buffer data structure.
 *
 * This routine releases the lpfc Direct Memory Access (DMA) buffer
 * associated with a Buffer Pointer List (BPL) back to the lpfc DMA buffer
 * pool.
 *
 * Return code
 *   0 - Successfully released lpfc DMA buffer (currently, always return 0)
 **/
2778
static int
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lpfc_els_free_bpl(struct lpfc_hba *phba, struct lpfc_dmabuf *buf_ptr)
{
	lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
	kfree(buf_ptr);
	return 0;
}

2786
/**
2787
 * lpfc_els_free_iocb - Free a command iocb and its associated resources
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 * @phba: pointer to lpfc hba data structure.
 * @elsiocb: pointer to lpfc els command iocb data structure.
 *
 * This routine frees a command IOCB and its associated resources. The
 * command IOCB data structure contains the reference to various associated
 * resources, these fields must be set to NULL if the associated reference
 * not present:
 *   context1 - reference to ndlp
 *   context2 - reference to cmd
 *   context2->next - reference to rsp
 *   context3 - reference to bpl
 *
 * It first properly decrements the reference count held on ndlp for the
 * IOCB completion callback function. If LPFC_DELAY_MEM_FREE flag is not
 * set, it invokes the lpfc_els_free_data() routine to release the Direct
 * Memory Access (DMA) buffers associated with the IOCB. Otherwise, it
 * adds the DMA buffer the @phba data structure for the delayed release.
 * If reference to the Buffer Pointer List (BPL) is present, the
 * lpfc_els_free_bpl() routine is invoked to release the DMA memory
 * associated with BPL. Finally, the lpfc_sli_release_iocbq() routine is
 * invoked to release the IOCB data structure back to @phba IOCBQ list.
 *
 * Return code
 *   0 - Success (currently, always return 0)
 **/
2813
int
2814
lpfc_els_free_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *elsiocb)
2815 2816
{
	struct lpfc_dmabuf *buf_ptr, *buf_ptr1;
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	struct lpfc_nodelist *ndlp;

	ndlp = (struct lpfc_nodelist *)elsiocb->context1;
	if (ndlp) {
		if (ndlp->nlp_flag & NLP_DEFER_RM) {
			lpfc_nlp_put(ndlp);
2823

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			/* If the ndlp is not being used by another discovery
			 * thread, free it.
			 */
			if (!lpfc_nlp_not_used(ndlp)) {
				/* If ndlp is being used by another discovery
				 * thread, just clear NLP_DEFER_RM
				 */
				ndlp->nlp_flag &= ~NLP_DEFER_RM;
			}
		}
		else
			lpfc_nlp_put(ndlp);
2836 2837
		elsiocb->context1 = NULL;
	}
2838 2839
	/* context2  = cmd,  context2->next = rsp, context3 = bpl */
	if (elsiocb->context2) {
2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868
		if (elsiocb->iocb_flag & LPFC_DELAY_MEM_FREE) {
			/* Firmware could still be in progress of DMAing
			 * payload, so don't free data buffer till after
			 * a hbeat.
			 */
			elsiocb->iocb_flag &= ~LPFC_DELAY_MEM_FREE;
			buf_ptr = elsiocb->context2;
			elsiocb->context2 = NULL;
			if (buf_ptr) {
				buf_ptr1 = NULL;
				spin_lock_irq(&phba->hbalock);
				if (!list_empty(&buf_ptr->list)) {
					list_remove_head(&buf_ptr->list,
						buf_ptr1, struct lpfc_dmabuf,
						list);
					INIT_LIST_HEAD(&buf_ptr1->list);
					list_add_tail(&buf_ptr1->list,
						&phba->elsbuf);
					phba->elsbuf_cnt++;
				}
				INIT_LIST_HEAD(&buf_ptr->list);
				list_add_tail(&buf_ptr->list, &phba->elsbuf);
				phba->elsbuf_cnt++;
				spin_unlock_irq(&phba->hbalock);
			}
		} else {
			buf_ptr1 = (struct lpfc_dmabuf *) elsiocb->context2;
			lpfc_els_free_data(phba, buf_ptr1);
		}
2869 2870 2871 2872
	}

	if (elsiocb->context3) {
		buf_ptr = (struct lpfc_dmabuf *) elsiocb->context3;
2873
		lpfc_els_free_bpl(phba, buf_ptr);
2874
	}
2875
	lpfc_sli_release_iocbq(phba, elsiocb);
2876 2877 2878
	return 0;
}

2879
/**
2880
 * lpfc_cmpl_els_logo_acc - Completion callback function to logo acc response
2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895
 * @phba: pointer to lpfc hba data structure.
 * @cmdiocb: pointer to lpfc command iocb data structure.
 * @rspiocb: pointer to lpfc response iocb data structure.
 *
 * This routine is the completion callback function to the Logout (LOGO)
 * Accept (ACC) Response ELS command. This routine is invoked to indicate
 * the completion of the LOGO process. It invokes the lpfc_nlp_not_used() to
 * release the ndlp if it has the last reference remaining (reference count
 * is 1). If succeeded (meaning ndlp released), it sets the IOCB context1
 * field to NULL to inform the following lpfc_els_free_iocb() routine no
 * ndlp reference count needs to be decremented. Otherwise, the ndlp
 * reference use-count shall be decremented by the lpfc_els_free_iocb()
 * routine. Finally, the lpfc_els_free_iocb() is invoked to release the
 * IOCB data structure.
 **/
2896
static void
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2897 2898
lpfc_cmpl_els_logo_acc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
		       struct lpfc_iocbq *rspiocb)
2899
{
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	struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) cmdiocb->context1;
	struct lpfc_vport *vport = cmdiocb->vport;
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	IOCB_t *irsp;

	irsp = &rspiocb->iocb;
	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
		"ACC LOGO cmpl:   status:x%x/x%x did:x%x",
		irsp->ulpStatus, irsp->un.ulpWord[4], ndlp->nlp_DID);
2908
	/* ACC to LOGO completes to NPort <nlp_DID> */
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	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
			 "0109 ACC to LOGO completes to NPort x%x "
			 "Data: x%x x%x x%x\n",
			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
			 ndlp->nlp_rpi);
2914 2915 2916 2917 2918 2919 2920 2921

	if (ndlp->nlp_state == NLP_STE_NPR_NODE) {
		/* NPort Recovery mode or node is just allocated */
		if (!lpfc_nlp_not_used(ndlp)) {
			/* If the ndlp is being used by another discovery
			 * thread, just unregister the RPI.
			 */
			lpfc_unreg_rpi(vport, ndlp);
2922 2923 2924 2925 2926
		} else {
			/* Indicate the node has already released, should
			 * not reference to it from within lpfc_els_free_iocb.
			 */
			cmdiocb->context1 = NULL;
2927
		}
2928 2929 2930 2931 2932
	}
	lpfc_els_free_iocb(phba, cmdiocb);
	return;
}

2933
/**
2934
 * lpfc_mbx_cmpl_dflt_rpi - Completion callbk func for unreg dflt rpi mbox cmd
2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945
 * @phba: pointer to lpfc hba data structure.
 * @pmb: pointer to the driver internal queue element for mailbox command.
 *
 * This routine is the completion callback function for unregister default
 * RPI (Remote Port Index) mailbox command to the @phba. It simply releases
 * the associated lpfc Direct Memory Access (DMA) buffer back to the pool and
 * decrements the ndlp reference count held for this completion callback
 * function. After that, it invokes the lpfc_nlp_not_used() to check
 * whether there is only one reference left on the ndlp. If so, it will
 * perform one more decrement and trigger the release of the ndlp.
 **/
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void
lpfc_mbx_cmpl_dflt_rpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
{
	struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1);
	struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) pmb->context2;

	pmb->context1 = NULL;
	lpfc_mbuf_free(phba, mp->virt, mp->phys);
	kfree(mp);
	mempool_free(pmb, phba->mbox_mem_pool);
2956
	if (ndlp && NLP_CHK_NODE_ACT(ndlp)) {
2957 2958 2959 2960 2961 2962 2963
		lpfc_nlp_put(ndlp);
		/* This is the end of the default RPI cleanup logic for this
		 * ndlp. If no other discovery threads are using this ndlp.
		 * we should free all resources associated with it.
		 */
		lpfc_nlp_not_used(ndlp);
	}
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	return;
}

2967
/**
2968
 * lpfc_cmpl_els_rsp - Completion callback function for els response iocb cmd
2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982
 * @phba: pointer to lpfc hba data structure.
 * @cmdiocb: pointer to lpfc command iocb data structure.
 * @rspiocb: pointer to lpfc response iocb data structure.
 *
 * This routine is the completion callback function for ELS Response IOCB
 * command. In normal case, this callback function just properly sets the
 * nlp_flag bitmap in the ndlp data structure, if the mbox command reference
 * field in the command IOCB is not NULL, the referred mailbox command will
 * be send out, and then invokes the lpfc_els_free_iocb() routine to release
 * the IOCB. Under error conditions, such as when a LS_RJT is returned or a
 * link down event occurred during the discovery, the lpfc_nlp_not_used()
 * routine shall be invoked trying to release the ndlp if no other threads
 * are currently referring it.
 **/
2983
static void
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2984
lpfc_cmpl_els_rsp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
2985
		  struct lpfc_iocbq *rspiocb)
2986
{
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	struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) cmdiocb->context1;
	struct lpfc_vport *vport = ndlp ? ndlp->vport : NULL;
	struct Scsi_Host  *shost = vport ? lpfc_shost_from_vport(vport) : NULL;
2990 2991
	IOCB_t  *irsp;
	uint8_t *pcmd;
2992
	LPFC_MBOXQ_t *mbox = NULL;
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2993
	struct lpfc_dmabuf *mp = NULL;
2994
	uint32_t ls_rjt = 0;
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	irsp = &rspiocb->iocb;

2998 2999 3000
	if (cmdiocb->context_un.mbox)
		mbox = cmdiocb->context_un.mbox;

3001 3002 3003
	/* First determine if this is a LS_RJT cmpl. Note, this callback
	 * function can have cmdiocb->contest1 (ndlp) field set to NULL.
	 */
3004
	pcmd = (uint8_t *) (((struct lpfc_dmabuf *) cmdiocb->context2)->virt);
3005 3006
	if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
	    (*((uint32_t *) (pcmd)) == ELS_CMD_LS_RJT)) {
3007 3008
		/* A LS_RJT associated with Default RPI cleanup has its own
		 * seperate code path.
3009 3010 3011 3012 3013
		 */
		if (!(ndlp->nlp_flag & NLP_RM_DFLT_RPI))
			ls_rjt = 1;
	}

3014
	/* Check to see if link went down during discovery */
3015
	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) || lpfc_els_chk_latt(vport)) {
3016
		if (mbox) {
3017 3018 3019 3020 3021
			mp = (struct lpfc_dmabuf *) mbox->context1;
			if (mp) {
				lpfc_mbuf_free(phba, mp->virt, mp->phys);
				kfree(mp);
			}
3022
			mempool_free(mbox, phba->mbox_mem_pool);
3023
		}
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		if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
		    (ndlp->nlp_flag & NLP_RM_DFLT_RPI))
3026
			if (lpfc_nlp_not_used(ndlp)) {
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				ndlp = NULL;
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				/* Indicate the node has already released,
				 * should not reference to it from within
				 * the routine lpfc_els_free_iocb.
				 */
				cmdiocb->context1 = NULL;
			}
3034 3035 3036
		goto out;
	}

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3037
	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
3038
		"ELS rsp cmpl:    status:x%x/x%x did:x%x",
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3039
		irsp->ulpStatus, irsp->un.ulpWord[4],
3040
		cmdiocb->iocb.un.elsreq64.remoteID);
3041
	/* ELS response tag <ulpIoTag> completes */
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	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
			 "0110 ELS response tag x%x completes "
			 "Data: x%x x%x x%x x%x x%x x%x x%x\n",
			 cmdiocb->iocb.ulpIoTag, rspiocb->iocb.ulpStatus,
			 rspiocb->iocb.un.ulpWord[4], rspiocb->iocb.ulpTimeout,
			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
			 ndlp->nlp_rpi);
3049 3050 3051
	if (mbox) {
		if ((rspiocb->iocb.ulpStatus == 0)
		    && (ndlp->nlp_flag & NLP_ACC_REGLOGIN)) {
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3052
			lpfc_unreg_rpi(vport, ndlp);
3053 3054 3055
			/* Increment reference count to ndlp to hold the
			 * reference to ndlp for the callback function.
			 */
3056
			mbox->context2 = lpfc_nlp_get(ndlp);
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3057
			mbox->vport = vport;
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			if (ndlp->nlp_flag & NLP_RM_DFLT_RPI) {
				mbox->mbox_flag |= LPFC_MBX_IMED_UNREG;
				mbox->mbox_cmpl = lpfc_mbx_cmpl_dflt_rpi;
			}
			else {
				mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
				ndlp->nlp_prev_state = ndlp->nlp_state;
				lpfc_nlp_set_state(vport, ndlp,
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3066
					   NLP_STE_REG_LOGIN_ISSUE);
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3067
			}
3068
			if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
3069
			    != MBX_NOT_FINISHED)
3070
				goto out;
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			else
				/* Decrement the ndlp reference count we
				 * set for this failed mailbox command.
				 */
				lpfc_nlp_put(ndlp);
3076 3077 3078 3079 3080 3081 3082 3083

			/* ELS rsp: Cannot issue reg_login for <NPortid> */
			lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
				"0138 ELS rsp: Cannot issue reg_login for x%x "
				"Data: x%x x%x x%x\n",
				ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
				ndlp->nlp_rpi);

3084
			if (lpfc_nlp_not_used(ndlp)) {
3085
				ndlp = NULL;
3086 3087 3088 3089 3090 3091
				/* Indicate node has already been released,
				 * should not reference to it from within
				 * the routine lpfc_els_free_iocb.
				 */
				cmdiocb->context1 = NULL;
			}
3092
		} else {
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3093 3094 3095
			/* Do not drop node for lpfc_els_abort'ed ELS cmds */
			if (!lpfc_error_lost_link(irsp) &&
			    ndlp->nlp_flag & NLP_ACC_REGLOGIN) {
3096
				if (lpfc_nlp_not_used(ndlp)) {
3097
					ndlp = NULL;
3098 3099 3100 3101 3102 3103 3104
					/* Indicate node has already been
					 * released, should not reference
					 * to it from within the routine
					 * lpfc_els_free_iocb.
					 */
					cmdiocb->context1 = NULL;
				}
3105 3106
			}
		}
3107 3108 3109 3110 3111 3112
		mp = (struct lpfc_dmabuf *) mbox->context1;
		if (mp) {
			lpfc_mbuf_free(phba, mp->virt, mp->phys);
			kfree(mp);
		}
		mempool_free(mbox, phba->mbox_mem_pool);
3113 3114
	}
out:
3115
	if (ndlp && NLP_CHK_NODE_ACT(ndlp)) {
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3116
		spin_lock_irq(shost->host_lock);
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3117
		ndlp->nlp_flag &= ~(NLP_ACC_REGLOGIN | NLP_RM_DFLT_RPI);
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3118
		spin_unlock_irq(shost->host_lock);
3119 3120 3121 3122 3123 3124 3125

		/* If the node is not being used by another discovery thread,
		 * and we are sending a reject, we are done with it.
		 * Release driver reference count here and free associated
		 * resources.
		 */
		if (ls_rjt)
3126 3127 3128 3129 3130 3131
			if (lpfc_nlp_not_used(ndlp))
				/* Indicate node has already been released,
				 * should not reference to it from within
				 * the routine lpfc_els_free_iocb.
				 */
				cmdiocb->context1 = NULL;
3132
	}
3133

3134 3135 3136 3137
	lpfc_els_free_iocb(phba, cmdiocb);
	return;
}

3138
/**
3139
 * lpfc_els_rsp_acc - Prepare and issue an acc response iocb command
3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162
 * @vport: pointer to a host virtual N_Port data structure.
 * @flag: the els command code to be accepted.
 * @oldiocb: pointer to the original lpfc command iocb data structure.
 * @ndlp: pointer to a node-list data structure.
 * @mbox: pointer to the driver internal queue element for mailbox command.
 *
 * This routine prepares and issues an Accept (ACC) response IOCB
 * command. It uses the @flag to properly set up the IOCB field for the
 * specific ACC response command to be issued and invokes the
 * lpfc_sli_issue_iocb() routine to send out ACC response IOCB. If a
 * @mbox pointer is passed in, it will be put into the context_un.mbox
 * field of the IOCB for the completion callback function to issue the
 * mailbox command to the HBA later when callback is invoked.
 *
 * 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 corresponding response ELS IOCB command.
 *
 * Return code
 *   0 - Successfully issued acc response
 *   1 - Failed to issue acc response
 **/
3163
int
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3164 3165
lpfc_els_rsp_acc(struct lpfc_vport *vport, uint32_t flag,
		 struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp,
3166
		 LPFC_MBOXQ_t *mbox)
3167
{
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3168 3169
	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
	struct lpfc_hba  *phba = vport->phba;
3170 3171 3172 3173 3174 3175 3176 3177
	IOCB_t *icmd;
	IOCB_t *oldcmd;
	struct lpfc_iocbq *elsiocb;
	struct lpfc_sli_ring *pring;
	struct lpfc_sli *psli;
	uint8_t *pcmd;
	uint16_t cmdsize;
	int rc;
3178
	ELS_PKT *els_pkt_ptr;
3179 3180 3181 3182 3183 3184 3185

	psli = &phba->sli;
	pring = &psli->ring[LPFC_ELS_RING];	/* ELS ring */
	oldcmd = &oldiocb->iocb;

	switch (flag) {
	case ELS_CMD_ACC:
3186
		cmdsize = sizeof(uint32_t);
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3187 3188
		elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
					     ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
3189
		if (!elsiocb) {
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3190
			spin_lock_irq(shost->host_lock);
3191
			ndlp->nlp_flag &= ~NLP_LOGO_ACC;
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3192
			spin_unlock_irq(shost->host_lock);
3193
			return 1;
3194
		}
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3195

3196 3197 3198 3199
		icmd = &elsiocb->iocb;
		icmd->ulpContext = oldcmd->ulpContext;	/* Xri */
		pcmd = (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
		*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
3200
		pcmd += sizeof(uint32_t);
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3201 3202 3203 3204

		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
			"Issue ACC:       did:x%x flg:x%x",
			ndlp->nlp_DID, ndlp->nlp_flag, 0);
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		break;
	case ELS_CMD_PLOGI:
3207
		cmdsize = (sizeof(struct serv_parm) + sizeof(uint32_t));
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3208 3209
		elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
					     ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
3210
		if (!elsiocb)
3211
			return 1;
3212

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		icmd = &elsiocb->iocb;
		icmd->ulpContext = oldcmd->ulpContext;	/* Xri */
		pcmd = (((struct lpfc_dmabuf *) elsiocb->context2)->virt);

		if (mbox)
			elsiocb->context_un.mbox = mbox;

		*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
3221 3222
		pcmd += sizeof(uint32_t);
		memcpy(pcmd, &vport->fc_sparam, sizeof(struct serv_parm));
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		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
			"Issue ACC PLOGI: did:x%x flg:x%x",
			ndlp->nlp_DID, ndlp->nlp_flag, 0);
3227
		break;
3228
	case ELS_CMD_PRLO:
3229
		cmdsize = sizeof(uint32_t) + sizeof(PRLO);
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		elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
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					     ndlp, ndlp->nlp_DID, ELS_CMD_PRLO);
		if (!elsiocb)
			return 1;

		icmd = &elsiocb->iocb;
		icmd->ulpContext = oldcmd->ulpContext; /* Xri */
		pcmd = (((struct lpfc_dmabuf *) elsiocb->context2)->virt);

		memcpy(pcmd, ((struct lpfc_dmabuf *) oldiocb->context2)->virt,
3240
		       sizeof(uint32_t) + sizeof(PRLO));
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		*((uint32_t *) (pcmd)) = ELS_CMD_PRLO_ACC;
		els_pkt_ptr = (ELS_PKT *) pcmd;
		els_pkt_ptr->un.prlo.acceptRspCode = PRLO_REQ_EXECUTED;
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3244 3245 3246 3247

		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
			"Issue ACC PRLO:  did:x%x flg:x%x",
			ndlp->nlp_DID, ndlp->nlp_flag, 0);
3248
		break;
3249
	default:
3250
		return 1;
3251 3252
	}
	/* Xmit ELS ACC response tag <ulpIoTag> */
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	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
			 "0128 Xmit ELS ACC response tag x%x, XRI: x%x, "
			 "DID: x%x, nlp_flag: x%x nlp_state: x%x RPI: x%x\n",
			 elsiocb->iotag, elsiocb->iocb.ulpContext,
			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
			 ndlp->nlp_rpi);
3259
	if (ndlp->nlp_flag & NLP_LOGO_ACC) {
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3260
		spin_lock_irq(shost->host_lock);
3261
		ndlp->nlp_flag &= ~NLP_LOGO_ACC;
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3262
		spin_unlock_irq(shost->host_lock);
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		elsiocb->iocb_cmpl = lpfc_cmpl_els_logo_acc;
	} else {
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		elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
3266 3267 3268 3269 3270 3271
	}

	phba->fc_stat.elsXmitACC++;
	rc = lpfc_sli_issue_iocb(phba, pring, elsiocb, 0);
	if (rc == IOCB_ERROR) {
		lpfc_els_free_iocb(phba, elsiocb);
3272
		return 1;
3273
	}
3274
	return 0;
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}

3277
/**
3278
 * lpfc_els_rsp_reject - Propare and issue a rjt response iocb command
3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298
 * @vport: pointer to a virtual N_Port data structure.
 * @rejectError:
 * @oldiocb: pointer to the original lpfc command iocb data structure.
 * @ndlp: pointer to a node-list data structure.
 * @mbox: pointer to the driver internal queue element for mailbox command.
 *
 * This routine prepares and issue an Reject (RJT) response IOCB
 * command. If a @mbox pointer is passed in, it will be put into the
 * context_un.mbox field of the IOCB for the completion callback function
 * to issue to the HBA later.
 *
 * 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 reject response ELS IOCB command.
 *
 * Return code
 *   0 - Successfully issued reject response
 *   1 - Failed to issue reject response
 **/
3299
int
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3300
lpfc_els_rsp_reject(struct lpfc_vport *vport, uint32_t rejectError,
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3301 3302
		    struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp,
		    LPFC_MBOXQ_t *mbox)
3303
{
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3304
	struct lpfc_hba  *phba = vport->phba;
3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316
	IOCB_t *icmd;
	IOCB_t *oldcmd;
	struct lpfc_iocbq *elsiocb;
	struct lpfc_sli_ring *pring;
	struct lpfc_sli *psli;
	uint8_t *pcmd;
	uint16_t cmdsize;
	int rc;

	psli = &phba->sli;
	pring = &psli->ring[LPFC_ELS_RING];	/* ELS ring */

3317
	cmdsize = 2 * sizeof(uint32_t);
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3318 3319
	elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
				     ndlp->nlp_DID, ELS_CMD_LS_RJT);
3320
	if (!elsiocb)
3321
		return 1;
3322 3323 3324 3325 3326 3327 3328

	icmd = &elsiocb->iocb;
	oldcmd = &oldiocb->iocb;
	icmd->ulpContext = oldcmd->ulpContext;	/* Xri */
	pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);

	*((uint32_t *) (pcmd)) = ELS_CMD_LS_RJT;
3329
	pcmd += sizeof(uint32_t);
3330 3331
	*((uint32_t *) (pcmd)) = rejectError;

3332
	if (mbox)
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3333 3334
		elsiocb->context_un.mbox = mbox;

3335
	/* Xmit ELS RJT <err> response tag <ulpIoTag> */
3336 3337 3338 3339 3340 3341 3342
	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
			 "0129 Xmit ELS RJT x%x response tag x%x "
			 "xri x%x, did x%x, nlp_flag x%x, nlp_state x%x, "
			 "rpi x%x\n",
			 rejectError, elsiocb->iotag,
			 elsiocb->iocb.ulpContext, ndlp->nlp_DID,
			 ndlp->nlp_flag, ndlp->nlp_state, ndlp->nlp_rpi);
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3343 3344 3345 3346
	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
		"Issue LS_RJT:    did:x%x flg:x%x err:x%x",
		ndlp->nlp_DID, ndlp->nlp_flag, rejectError);

3347
	phba->fc_stat.elsXmitLSRJT++;
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3348
	elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
3349
	rc = lpfc_sli_issue_iocb(phba, pring, elsiocb, 0);
3350

3351 3352
	if (rc == IOCB_ERROR) {
		lpfc_els_free_iocb(phba, elsiocb);
3353
		return 1;
3354
	}
3355
	return 0;
3356 3357
}

3358
/**
3359
 * lpfc_els_rsp_adisc_acc - Prepare and issue acc response to adisc iocb cmd
3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376
 * @vport: pointer to a virtual N_Port data structure.
 * @oldiocb: pointer to the original lpfc command iocb data structure.
 * @ndlp: pointer to a node-list data structure.
 *
 * This routine prepares and issues an Accept (ACC) response to Address
 * Discover (ADISC) ELS command. It simply prepares the payload of the IOCB
 * and invokes the lpfc_sli_issue_iocb() routine to send out the command.
 *
 * 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 ADISC Accept response ELS IOCB command.
 *
 * Return code
 *   0 - Successfully issued acc adisc response
 *   1 - Failed to issue adisc acc response
 **/
3377
int
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3378 3379
lpfc_els_rsp_adisc_acc(struct lpfc_vport *vport, struct lpfc_iocbq *oldiocb,
		       struct lpfc_nodelist *ndlp)
3380
{
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3381 3382 3383
	struct lpfc_hba  *phba = vport->phba;
	struct lpfc_sli  *psli = &phba->sli;
	struct lpfc_sli_ring *pring = &psli->ring[LPFC_ELS_RING];
3384
	ADISC *ap;
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3385
	IOCB_t *icmd, *oldcmd;
3386 3387 3388 3389 3390
	struct lpfc_iocbq *elsiocb;
	uint8_t *pcmd;
	uint16_t cmdsize;
	int rc;

3391
	cmdsize = sizeof(uint32_t) + sizeof(ADISC);
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3392 3393
	elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
				     ndlp->nlp_DID, ELS_CMD_ACC);
3394
	if (!elsiocb)
3395
		return 1;
3396

3397 3398 3399 3400
	icmd = &elsiocb->iocb;
	oldcmd = &oldiocb->iocb;
	icmd->ulpContext = oldcmd->ulpContext;	/* Xri */

3401
	/* Xmit ADISC ACC response tag <ulpIoTag> */
3402 3403 3404 3405 3406 3407
	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
			 "0130 Xmit ADISC ACC response iotag x%x xri: "
			 "x%x, did x%x, nlp_flag x%x, nlp_state x%x rpi x%x\n",
			 elsiocb->iotag, elsiocb->iocb.ulpContext,
			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
			 ndlp->nlp_rpi);
3408 3409 3410
	pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);

	*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
3411
	pcmd += sizeof(uint32_t);
3412 3413 3414

	ap = (ADISC *) (pcmd);
	ap->hardAL_PA = phba->fc_pref_ALPA;
3415 3416
	memcpy(&ap->portName, &vport->fc_portname, sizeof(struct lpfc_name));
	memcpy(&ap->nodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
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3417
	ap->DID = be32_to_cpu(vport->fc_myDID);
3418

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3419 3420 3421 3422
	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
		"Issue ACC ADISC: did:x%x flg:x%x",
		ndlp->nlp_DID, ndlp->nlp_flag, 0);

3423
	phba->fc_stat.elsXmitACC++;
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3424
	elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
3425 3426 3427
	rc = lpfc_sli_issue_iocb(phba, pring, elsiocb, 0);
	if (rc == IOCB_ERROR) {
		lpfc_els_free_iocb(phba, elsiocb);
3428
		return 1;
3429
	}
3430
	return 0;
3431 3432
}

3433
/**
3434
 * lpfc_els_rsp_prli_acc - Prepare and issue acc response to prli iocb cmd
3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451
 * @vport: pointer to a virtual N_Port data structure.
 * @oldiocb: pointer to the original lpfc command iocb data structure.
 * @ndlp: pointer to a node-list data structure.
 *
 * This routine prepares and issues an Accept (ACC) response to Process
 * Login (PRLI) ELS command. It simply prepares the payload of the IOCB
 * and invokes the lpfc_sli_issue_iocb() routine to send out the command.
 *
 * 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 PRLI Accept response ELS IOCB command.
 *
 * Return code
 *   0 - Successfully issued acc prli response
 *   1 - Failed to issue acc prli response
 **/
3452
int
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3453
lpfc_els_rsp_prli_acc(struct lpfc_vport *vport, struct lpfc_iocbq *oldiocb,
3454
		      struct lpfc_nodelist *ndlp)
3455
{
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3456
	struct lpfc_hba  *phba = vport->phba;
3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470
	PRLI *npr;
	lpfc_vpd_t *vpd;
	IOCB_t *icmd;
	IOCB_t *oldcmd;
	struct lpfc_iocbq *elsiocb;
	struct lpfc_sli_ring *pring;
	struct lpfc_sli *psli;
	uint8_t *pcmd;
	uint16_t cmdsize;
	int rc;

	psli = &phba->sli;
	pring = &psli->ring[LPFC_ELS_RING];	/* ELS ring */

3471
	cmdsize = sizeof(uint32_t) + sizeof(PRLI);
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3472
	elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
3473
		ndlp->nlp_DID, (ELS_CMD_ACC | (ELS_CMD_PRLI & ~ELS_RSP_MASK)));
3474 3475
	if (!elsiocb)
		return 1;
3476

3477 3478 3479
	icmd = &elsiocb->iocb;
	oldcmd = &oldiocb->iocb;
	icmd->ulpContext = oldcmd->ulpContext;	/* Xri */
3480
	/* Xmit PRLI ACC response tag <ulpIoTag> */
3481 3482 3483 3484 3485 3486
	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
			 "0131 Xmit PRLI ACC response tag x%x xri x%x, "
			 "did x%x, nlp_flag x%x, nlp_state x%x, rpi x%x\n",
			 elsiocb->iotag, elsiocb->iocb.ulpContext,
			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
			 ndlp->nlp_rpi);
3487 3488 3489
	pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);

	*((uint32_t *) (pcmd)) = (ELS_CMD_ACC | (ELS_CMD_PRLI & ~ELS_RSP_MASK));
3490
	pcmd += sizeof(uint32_t);
3491 3492

	/* For PRLI, remainder of payload is PRLI parameter page */
3493
	memset(pcmd, 0, sizeof(PRLI));
3494 3495 3496 3497

	npr = (PRLI *) pcmd;
	vpd = &phba->vpd;
	/*
3498 3499
	 * If the remote port is a target and our firmware version is 3.20 or
	 * later, set the following bits for FC-TAPE support.
3500
	 */
3501 3502
	if ((ndlp->nlp_type & NLP_FCP_TARGET) &&
	    (vpd->rev.feaLevelHigh >= 0x02)) {
3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515
		npr->ConfmComplAllowed = 1;
		npr->Retry = 1;
		npr->TaskRetryIdReq = 1;
	}

	npr->acceptRspCode = PRLI_REQ_EXECUTED;
	npr->estabImagePair = 1;
	npr->readXferRdyDis = 1;
	npr->ConfmComplAllowed = 1;

	npr->prliType = PRLI_FCP_TYPE;
	npr->initiatorFunc = 1;

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3516 3517 3518 3519
	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
		"Issue ACC PRLI:  did:x%x flg:x%x",
		ndlp->nlp_DID, ndlp->nlp_flag, 0);

3520
	phba->fc_stat.elsXmitACC++;
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3521
	elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
3522 3523 3524 3525

	rc = lpfc_sli_issue_iocb(phba, pring, elsiocb, 0);
	if (rc == IOCB_ERROR) {
		lpfc_els_free_iocb(phba, elsiocb);
3526
		return 1;
3527
	}
3528
	return 0;
3529 3530
}

3531
/**
3532
 * lpfc_els_rsp_rnid_acc - Issue rnid acc response iocb command
3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556
 * @vport: pointer to a virtual N_Port data structure.
 * @format: rnid command format.
 * @oldiocb: pointer to the original lpfc command iocb data structure.
 * @ndlp: pointer to a node-list data structure.
 *
 * This routine issues a Request Node Identification Data (RNID) Accept
 * (ACC) response. It constructs the RNID ACC response command according to
 * the proper @format and then calls the lpfc_sli_issue_iocb() routine to
 * issue the response. Note that this command does not need to hold the ndlp
 * reference count for the callback. So, the ndlp reference count taken by
 * the lpfc_prep_els_iocb() routine is put back and the context1 field of
 * IOCB is set to NULL to indicate to the lpfc_els_free_iocb() routine that
 * there is no ndlp reference available.
 *
 * 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. However, for the RNID Accept Response ELS command,
 * this is undone later by this routine after the IOCB is allocated.
 *
 * Return code
 *   0 - Successfully issued acc rnid response
 *   1 - Failed to issue acc rnid response
 **/
3557
static int
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3558
lpfc_els_rsp_rnid_acc(struct lpfc_vport *vport, uint8_t format,
3559
		      struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp)
3560
{
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3561
	struct lpfc_hba  *phba = vport->phba;
3562
	RNID *rn;
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3563
	IOCB_t *icmd, *oldcmd;
3564 3565 3566 3567 3568 3569 3570 3571 3572 3573
	struct lpfc_iocbq *elsiocb;
	struct lpfc_sli_ring *pring;
	struct lpfc_sli *psli;
	uint8_t *pcmd;
	uint16_t cmdsize;
	int rc;

	psli = &phba->sli;
	pring = &psli->ring[LPFC_ELS_RING];

3574 3575
	cmdsize = sizeof(uint32_t) + sizeof(uint32_t)
					+ (2 * sizeof(struct lpfc_name));
3576
	if (format)
3577
		cmdsize += sizeof(RNID_TOP_DISC);
3578

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3579 3580
	elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
				     ndlp->nlp_DID, ELS_CMD_ACC);
3581
	if (!elsiocb)
3582
		return 1;
3583

3584 3585 3586
	icmd = &elsiocb->iocb;
	oldcmd = &oldiocb->iocb;
	icmd->ulpContext = oldcmd->ulpContext;	/* Xri */
3587
	/* Xmit RNID ACC response tag <ulpIoTag> */
3588 3589 3590
	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
			 "0132 Xmit RNID ACC response tag x%x xri x%x\n",
			 elsiocb->iotag, elsiocb->iocb.ulpContext);
3591 3592
	pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
	*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
3593
	pcmd += sizeof(uint32_t);
3594

3595
	memset(pcmd, 0, sizeof(RNID));
3596 3597
	rn = (RNID *) (pcmd);
	rn->Format = format;
3598 3599 3600
	rn->CommonLen = (2 * sizeof(struct lpfc_name));
	memcpy(&rn->portName, &vport->fc_portname, sizeof(struct lpfc_name));
	memcpy(&rn->nodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
3601 3602 3603 3604 3605
	switch (format) {
	case 0:
		rn->SpecificLen = 0;
		break;
	case RNID_TOPOLOGY_DISC:
3606
		rn->SpecificLen = sizeof(RNID_TOP_DISC);
3607
		memcpy(&rn->un.topologyDisc.portName,
3608
		       &vport->fc_portname, sizeof(struct lpfc_name));
3609 3610 3611 3612 3613 3614 3615 3616 3617 3618
		rn->un.topologyDisc.unitType = RNID_HBA;
		rn->un.topologyDisc.physPort = 0;
		rn->un.topologyDisc.attachedNodes = 0;
		break;
	default:
		rn->CommonLen = 0;
		rn->SpecificLen = 0;
		break;
	}

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3619 3620 3621 3622
	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
		"Issue ACC RNID:  did:x%x flg:x%x",
		ndlp->nlp_DID, ndlp->nlp_flag, 0);

3623
	phba->fc_stat.elsXmitACC++;
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3624
	elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
3625
	lpfc_nlp_put(ndlp);
3626 3627 3628 3629 3630 3631
	elsiocb->context1 = NULL;  /* Don't need ndlp for cmpl,
				    * it could be freed */

	rc = lpfc_sli_issue_iocb(phba, pring, elsiocb, 0);
	if (rc == IOCB_ERROR) {
		lpfc_els_free_iocb(phba, elsiocb);
3632
		return 1;
3633
	}
3634
	return 0;
3635 3636
}

3637
/**
3638
 * lpfc_els_disc_adisc - Issue remaining adisc iocbs to npr nodes of a vport
3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655
 * @vport: pointer to a host virtual N_Port data structure.
 *
 * This routine issues Address Discover (ADISC) ELS commands to those
 * N_Ports which are in node port recovery state and ADISC has not been issued
 * for the @vport. Each time an ELS ADISC IOCB is issued by invoking the
 * lpfc_issue_els_adisc() routine, the per @vport number of discover count
 * (num_disc_nodes) shall be incremented. If the num_disc_nodes reaches a
 * pre-configured threshold (cfg_discovery_threads), the @vport fc_flag will
 * be marked with FC_NLP_MORE bit and the process of issuing remaining ADISC
 * IOCBs quit for later pick up. On the other hand, after walking through
 * all the ndlps with the @vport and there is none ADISC IOCB issued, the
 * @vport fc_flag shall be cleared with FC_NLP_MORE bit indicating there is
 * no more ADISC need to be sent.
 *
 * Return code
 *    The number of N_Ports with adisc issued.
 **/
3656
int
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3657
lpfc_els_disc_adisc(struct lpfc_vport *vport)
3658
{
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3659
	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
3660
	struct lpfc_nodelist *ndlp, *next_ndlp;
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3661
	int sentadisc = 0;
3662

3663
	/* go thru NPR nodes and issue any remaining ELS ADISCs */
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3664
	list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
3665 3666
		if (!NLP_CHK_NODE_ACT(ndlp))
			continue;
3667 3668 3669
		if (ndlp->nlp_state == NLP_STE_NPR_NODE &&
		    (ndlp->nlp_flag & NLP_NPR_2B_DISC) != 0 &&
		    (ndlp->nlp_flag & NLP_NPR_ADISC) != 0) {
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3670
			spin_lock_irq(shost->host_lock);
3671
			ndlp->nlp_flag &= ~NLP_NPR_ADISC;
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3672
			spin_unlock_irq(shost->host_lock);
3673
			ndlp->nlp_prev_state = ndlp->nlp_state;
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3674 3675
			lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
			lpfc_issue_els_adisc(vport, ndlp, 0);
3676
			sentadisc++;
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3677 3678
			vport->num_disc_nodes++;
			if (vport->num_disc_nodes >=
3679
			    vport->cfg_discovery_threads) {
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3680 3681 3682
				spin_lock_irq(shost->host_lock);
				vport->fc_flag |= FC_NLP_MORE;
				spin_unlock_irq(shost->host_lock);
3683
				break;
3684 3685 3686 3687
			}
		}
	}
	if (sentadisc == 0) {
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3688 3689 3690
		spin_lock_irq(shost->host_lock);
		vport->fc_flag &= ~FC_NLP_MORE;
		spin_unlock_irq(shost->host_lock);
3691
	}
3692
	return sentadisc;
3693 3694
}

3695
/**
3696
 * lpfc_els_disc_plogi - Issue plogi for all npr nodes of a vport before adisc
3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713
 * @vport: pointer to a host virtual N_Port data structure.
 *
 * This routine issues Port Login (PLOGI) ELS commands to all the N_Ports
 * which are in node port recovery state, with a @vport. Each time an ELS
 * ADISC PLOGI IOCB is issued by invoking the lpfc_issue_els_plogi() routine,
 * the per @vport number of discover count (num_disc_nodes) shall be
 * incremented. If the num_disc_nodes reaches a pre-configured threshold
 * (cfg_discovery_threads), the @vport fc_flag will be marked with FC_NLP_MORE
 * bit set and quit the process of issuing remaining ADISC PLOGIN IOCBs for
 * later pick up. On the other hand, after walking through all the ndlps with
 * the @vport and there is none ADISC PLOGI IOCB issued, the @vport fc_flag
 * shall be cleared with the FC_NLP_MORE bit indicating there is no more ADISC
 * PLOGI need to be sent.
 *
 * Return code
 *   The number of N_Ports with plogi issued.
 **/
3714
int
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3715
lpfc_els_disc_plogi(struct lpfc_vport *vport)
3716
{
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3717
	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
3718
	struct lpfc_nodelist *ndlp, *next_ndlp;
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3719
	int sentplogi = 0;
3720

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3721 3722
	/* go thru NPR nodes and issue any remaining ELS PLOGIs */
	list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
3723 3724
		if (!NLP_CHK_NODE_ACT(ndlp))
			continue;
3725 3726 3727 3728 3729
		if (ndlp->nlp_state == NLP_STE_NPR_NODE &&
		    (ndlp->nlp_flag & NLP_NPR_2B_DISC) != 0 &&
		    (ndlp->nlp_flag & NLP_DELAY_TMO) == 0 &&
		    (ndlp->nlp_flag & NLP_NPR_ADISC) == 0) {
			ndlp->nlp_prev_state = ndlp->nlp_state;
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3730 3731
			lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
			lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
3732
			sentplogi++;
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3733 3734
			vport->num_disc_nodes++;
			if (vport->num_disc_nodes >=
3735
			    vport->cfg_discovery_threads) {
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3736 3737 3738
				spin_lock_irq(shost->host_lock);
				vport->fc_flag |= FC_NLP_MORE;
				spin_unlock_irq(shost->host_lock);
3739
				break;
3740 3741 3742
			}
		}
	}
3743 3744 3745 3746
	if (sentplogi) {
		lpfc_set_disctmo(vport);
	}
	else {
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3747 3748 3749
		spin_lock_irq(shost->host_lock);
		vport->fc_flag &= ~FC_NLP_MORE;
		spin_unlock_irq(shost->host_lock);
3750
	}
3751
	return sentplogi;
3752 3753
}

3754
/**
3755
 * lpfc_els_flush_rscn - Clean up any rscn activities with a vport
3756 3757 3758 3759 3760 3761 3762
 * @vport: pointer to a host virtual N_Port data structure.
 *
 * This routine cleans up any Registration State Change Notification
 * (RSCN) activity with a @vport. Note that the fc_rscn_flush flag of the
 * @vport together with the host_lock is used to prevent multiple thread
 * trying to access the RSCN array on a same @vport at the same time.
 **/
3763
void
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3764
lpfc_els_flush_rscn(struct lpfc_vport *vport)
3765
{
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3766 3767
	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
	struct lpfc_hba  *phba = vport->phba;
3768 3769
	int i;

3770 3771 3772 3773 3774 3775 3776 3777 3778 3779
	spin_lock_irq(shost->host_lock);
	if (vport->fc_rscn_flush) {
		/* Another thread is walking fc_rscn_id_list on this vport */
		spin_unlock_irq(shost->host_lock);
		return;
	}
	/* Indicate we are walking lpfc_els_flush_rscn on this vport */
	vport->fc_rscn_flush = 1;
	spin_unlock_irq(shost->host_lock);

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3780
	for (i = 0; i < vport->fc_rscn_id_cnt; i++) {
3781
		lpfc_in_buf_free(phba, vport->fc_rscn_id_list[i]);
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3782
		vport->fc_rscn_id_list[i] = NULL;
3783
	}
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3784 3785 3786 3787 3788
	spin_lock_irq(shost->host_lock);
	vport->fc_rscn_id_cnt = 0;
	vport->fc_flag &= ~(FC_RSCN_MODE | FC_RSCN_DISCOVERY);
	spin_unlock_irq(shost->host_lock);
	lpfc_can_disctmo(vport);
3789 3790
	/* Indicate we are done walking this fc_rscn_id_list */
	vport->fc_rscn_flush = 0;
3791 3792
}

3793
/**
3794
 * lpfc_rscn_payload_check - Check whether there is a pending rscn to a did
3795 3796 3797 3798 3799 3800 3801 3802 3803 3804
 * @vport: pointer to a host virtual N_Port data structure.
 * @did: remote destination port identifier.
 *
 * This routine checks whether there is any pending Registration State
 * Configuration Notification (RSCN) to a @did on @vport.
 *
 * Return code
 *   None zero - The @did matched with a pending rscn
 *   0 - not able to match @did with a pending rscn
 **/
3805
int
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3806
lpfc_rscn_payload_check(struct lpfc_vport *vport, uint32_t did)
3807 3808 3809 3810
{
	D_ID ns_did;
	D_ID rscn_did;
	uint32_t *lp;
3811
	uint32_t payload_len, i;
3812
	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
3813 3814 3815 3816 3817

	ns_did.un.word = did;

	/* Never match fabric nodes for RSCNs */
	if ((did & Fabric_DID_MASK) == Fabric_DID_MASK)
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3818
		return 0;
3819 3820

	/* If we are doing a FULL RSCN rediscovery, match everything */
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3821
	if (vport->fc_flag & FC_RSCN_DISCOVERY)
3822
		return did;
3823

3824 3825 3826 3827 3828 3829 3830 3831 3832
	spin_lock_irq(shost->host_lock);
	if (vport->fc_rscn_flush) {
		/* Another thread is walking fc_rscn_id_list on this vport */
		spin_unlock_irq(shost->host_lock);
		return 0;
	}
	/* Indicate we are walking fc_rscn_id_list on this vport */
	vport->fc_rscn_flush = 1;
	spin_unlock_irq(shost->host_lock);
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3833
	for (i = 0; i < vport->fc_rscn_id_cnt; i++) {
3834 3835 3836
		lp = vport->fc_rscn_id_list[i]->virt;
		payload_len = be32_to_cpu(*lp++ & ~ELS_CMD_MASK);
		payload_len -= sizeof(uint32_t);	/* take off word 0 */
3837
		while (payload_len) {
3838 3839
			rscn_did.un.word = be32_to_cpu(*lp++);
			payload_len -= sizeof(uint32_t);
3840 3841
			switch (rscn_did.un.b.resv & RSCN_ADDRESS_FORMAT_MASK) {
			case RSCN_ADDRESS_FORMAT_PORT:
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3842
				if (ns_did.un.word == rscn_did.un.word)
3843
					goto return_did_out;
3844
				break;
3845
			case RSCN_ADDRESS_FORMAT_AREA:
3846 3847
				if ((ns_did.un.b.domain == rscn_did.un.b.domain)
				    && (ns_did.un.b.area == rscn_did.un.b.area))
3848
					goto return_did_out;
3849
				break;
3850
			case RSCN_ADDRESS_FORMAT_DOMAIN:
3851
				if (ns_did.un.b.domain == rscn_did.un.b.domain)
3852
					goto return_did_out;
3853
				break;
3854
			case RSCN_ADDRESS_FORMAT_FABRIC:
3855
				goto return_did_out;
3856 3857
			}
		}
3858
	}
3859 3860
	/* Indicate we are done with walking fc_rscn_id_list on this vport */
	vport->fc_rscn_flush = 0;
3861
	return 0;
3862 3863 3864 3865
return_did_out:
	/* Indicate we are done with walking fc_rscn_id_list on this vport */
	vport->fc_rscn_flush = 0;
	return did;
3866 3867
}

3868
/**
3869
 * lpfc_rscn_recovery_check - Send recovery event to vport nodes matching rscn
3870 3871 3872 3873 3874 3875 3876 3877 3878
 * @vport: pointer to a host virtual N_Port data structure.
 *
 * This routine sends recovery (NLP_EVT_DEVICE_RECOVERY) event to the
 * state machine for a @vport's nodes that are with pending RSCN (Registration
 * State Change Notification).
 *
 * Return code
 *   0 - Successful (currently alway return 0)
 **/
3879
static int
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3880
lpfc_rscn_recovery_check(struct lpfc_vport *vport)
3881
{
3882
	struct lpfc_nodelist *ndlp = NULL;
3883

3884
	/* Move all affected nodes by pending RSCNs to NPR state. */
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3885
	list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
3886
		if (!NLP_CHK_NODE_ACT(ndlp) ||
3887 3888
		    (ndlp->nlp_state == NLP_STE_UNUSED_NODE) ||
		    !lpfc_rscn_payload_check(vport, ndlp->nlp_DID))
3889
			continue;
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3890
		lpfc_disc_state_machine(vport, ndlp, NULL,
3891 3892
					NLP_EVT_DEVICE_RECOVERY);
		lpfc_cancel_retry_delay_tmo(vport, ndlp);
3893
	}
3894
	return 0;
3895 3896
}

3897
/**
3898
 * lpfc_send_rscn_event - Send an RSCN event to management application
3899 3900 3901 3902 3903 3904 3905 3906 3907 3908 3909 3910 3911 3912 3913 3914 3915 3916 3917 3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938 3939
 * @vport: pointer to a host virtual N_Port data structure.
 * @cmdiocb: pointer to lpfc command iocb data structure.
 *
 * lpfc_send_rscn_event sends an RSCN netlink event to management
 * applications.
 */
static void
lpfc_send_rscn_event(struct lpfc_vport *vport,
		struct lpfc_iocbq *cmdiocb)
{
	struct lpfc_dmabuf *pcmd;
	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
	uint32_t *payload_ptr;
	uint32_t payload_len;
	struct lpfc_rscn_event_header *rscn_event_data;

	pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
	payload_ptr = (uint32_t *) pcmd->virt;
	payload_len = be32_to_cpu(*payload_ptr & ~ELS_CMD_MASK);

	rscn_event_data = kmalloc(sizeof(struct lpfc_rscn_event_header) +
		payload_len, GFP_KERNEL);
	if (!rscn_event_data) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
			"0147 Failed to allocate memory for RSCN event\n");
		return;
	}
	rscn_event_data->event_type = FC_REG_RSCN_EVENT;
	rscn_event_data->payload_length = payload_len;
	memcpy(rscn_event_data->rscn_payload, payload_ptr,
		payload_len);

	fc_host_post_vendor_event(shost,
		fc_get_event_number(),
		sizeof(struct lpfc_els_event_header) + payload_len,
		(char *)rscn_event_data,
		LPFC_NL_VENDOR_ID);

	kfree(rscn_event_data);
}

3940
/**
3941
 * lpfc_els_rcv_rscn - Process an unsolicited rscn iocb
3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961
 * @vport: pointer to a host virtual N_Port data structure.
 * @cmdiocb: pointer to lpfc command iocb data structure.
 * @ndlp: pointer to a node-list data structure.
 *
 * This routine processes an unsolicited RSCN (Registration State Change
 * Notification) IOCB. First, the payload of the unsolicited RSCN is walked
 * to invoke fc_host_post_event() routine to the FC transport layer. If the
 * discover state machine is about to begin discovery, it just accepts the
 * RSCN and the discovery process will satisfy the RSCN. If this RSCN only
 * contains N_Port IDs for other vports on this HBA, it just accepts the
 * RSCN and ignore processing it. If the state machine is in the recovery
 * state, the fc_rscn_id_list of this @vport is walked and the
 * lpfc_rscn_recovery_check() routine is invoked to send recovery event for
 * all nodes that match RSCN payload. Otherwise, the lpfc_els_handle_rscn()
 * routine is invoked to handle the RSCN event.
 *
 * Return code
 *   0 - Just sent the acc response
 *   1 - Sent the acc response and waited for name server completion
 **/
3962
static int
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3963
lpfc_els_rcv_rscn(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
3964
		  struct lpfc_nodelist *ndlp)
3965
{
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3966 3967
	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
	struct lpfc_hba  *phba = vport->phba;
3968
	struct lpfc_dmabuf *pcmd;
3969
	uint32_t *lp, *datap;
3970
	IOCB_t *icmd;
3971
	uint32_t payload_len, length, nportid, *cmd;
3972
	int rscn_cnt;
3973
	int rscn_id = 0, hba_id = 0;
3974
	int i;
3975 3976 3977 3978 3979

	icmd = &cmdiocb->iocb;
	pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
	lp = (uint32_t *) pcmd->virt;

3980 3981
	payload_len = be32_to_cpu(*lp++ & ~ELS_CMD_MASK);
	payload_len -= sizeof(uint32_t);	/* take off word 0 */
3982
	/* RSCN received */
3983 3984
	lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
			 "0214 RSCN received Data: x%x x%x x%x x%x\n",
3985 3986
			 vport->fc_flag, payload_len, *lp,
			 vport->fc_rscn_id_cnt);
3987 3988 3989 3990

	/* Send an RSCN event to the management application */
	lpfc_send_rscn_event(vport, cmdiocb);

3991
	for (i = 0; i < payload_len/sizeof(uint32_t); i++)
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3992
		fc_host_post_event(shost, fc_get_event_number(),
3993 3994
			FCH_EVT_RSCN, lp[i]);

3995 3996 3997
	/* If we are about to begin discovery, just ACC the RSCN.
	 * Discovery processing will satisfy it.
	 */
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3998
	if (vport->port_state <= LPFC_NS_QRY) {
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3999 4000 4001 4002
		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
			"RCV RSCN ignore: did:x%x/ste:x%x flg:x%x",
			ndlp->nlp_DID, vport->port_state, ndlp->nlp_flag);

4003
		lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
4004
		return 0;
4005 4006
	}

4007 4008 4009 4010
	/* If this RSCN just contains NPortIDs for other vports on this HBA,
	 * just ACC and ignore it.
	 */
	if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
4011
		!(vport->cfg_peer_port_login)) {
4012 4013 4014 4015 4016 4017 4018
		i = payload_len;
		datap = lp;
		while (i > 0) {
			nportid = *datap++;
			nportid = ((be32_to_cpu(nportid)) & Mask_DID);
			i -= sizeof(uint32_t);
			rscn_id++;
4019 4020
			if (lpfc_find_vport_by_did(phba, nportid))
				hba_id++;
4021 4022 4023
		}
		if (rscn_id == hba_id) {
			/* ALL NPortIDs in RSCN are on HBA */
4024
			lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
4025
					 "0219 Ignore RSCN "
4026 4027
					 "Data: x%x x%x x%x x%x\n",
					 vport->fc_flag, payload_len,
4028
					 *lp, vport->fc_rscn_id_cnt);
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4029 4030 4031 4032 4033
			lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
				"RCV RSCN vport:  did:x%x/ste:x%x flg:x%x",
				ndlp->nlp_DID, vport->port_state,
				ndlp->nlp_flag);

4034
			lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb,
4035
				ndlp, NULL);
4036 4037 4038 4039
			return 0;
		}
	}

4040 4041 4042 4043 4044
	spin_lock_irq(shost->host_lock);
	if (vport->fc_rscn_flush) {
		/* Another thread is walking fc_rscn_id_list on this vport */
		spin_unlock_irq(shost->host_lock);
		vport->fc_flag |= FC_RSCN_DISCOVERY;
4045 4046
		/* Send back ACC */
		lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
4047 4048 4049 4050 4051 4052 4053
		return 0;
	}
	/* Indicate we are walking fc_rscn_id_list on this vport */
	vport->fc_rscn_flush = 1;
	spin_unlock_irq(shost->host_lock);
	/* Get the array count after sucessfully have the token */
	rscn_cnt = vport->fc_rscn_id_cnt;
4054 4055 4056
	/* If we are already processing an RSCN, save the received
	 * RSCN payload buffer, cmdiocb->context2 to process later.
	 */
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4057
	if (vport->fc_flag & (FC_RSCN_MODE | FC_NDISC_ACTIVE)) {
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4058 4059 4060 4061
		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
			"RCV RSCN defer:  did:x%x/ste:x%x flg:x%x",
			ndlp->nlp_DID, vport->port_state, ndlp->nlp_flag);

4062
		spin_lock_irq(shost->host_lock);
4063 4064
		vport->fc_flag |= FC_RSCN_DEFERRED;
		if ((rscn_cnt < FC_MAX_HOLD_RSCN) &&
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4065 4066 4067
		    !(vport->fc_flag & FC_RSCN_DISCOVERY)) {
			vport->fc_flag |= FC_RSCN_MODE;
			spin_unlock_irq(shost->host_lock);
4068 4069 4070 4071 4072 4073 4074
			if (rscn_cnt) {
				cmd = vport->fc_rscn_id_list[rscn_cnt-1]->virt;
				length = be32_to_cpu(*cmd & ~ELS_CMD_MASK);
			}
			if ((rscn_cnt) &&
			    (payload_len + length <= LPFC_BPL_SIZE)) {
				*cmd &= ELS_CMD_MASK;
4075
				*cmd |= cpu_to_be32(payload_len + length);
4076 4077 4078 4079 4080 4081 4082 4083 4084 4085
				memcpy(((uint8_t *)cmd) + length, lp,
				       payload_len);
			} else {
				vport->fc_rscn_id_list[rscn_cnt] = pcmd;
				vport->fc_rscn_id_cnt++;
				/* If we zero, cmdiocb->context2, the calling
				 * routine will not try to free it.
				 */
				cmdiocb->context2 = NULL;
			}
4086
			/* Deferred RSCN */
4087 4088 4089 4090 4091
			lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
					 "0235 Deferred RSCN "
					 "Data: x%x x%x x%x\n",
					 vport->fc_rscn_id_cnt, vport->fc_flag,
					 vport->port_state);
4092
		} else {
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4093 4094
			vport->fc_flag |= FC_RSCN_DISCOVERY;
			spin_unlock_irq(shost->host_lock);
4095
			/* ReDiscovery RSCN */
4096 4097 4098 4099 4100
			lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
					 "0234 ReDiscovery RSCN "
					 "Data: x%x x%x x%x\n",
					 vport->fc_rscn_id_cnt, vport->fc_flag,
					 vport->port_state);
4101
		}
4102 4103
		/* Indicate we are done walking fc_rscn_id_list on this vport */
		vport->fc_rscn_flush = 0;
4104
		/* Send back ACC */
4105
		lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
4106
		/* send RECOVERY event for ALL nodes that match RSCN payload */
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4107
		lpfc_rscn_recovery_check(vport);
4108
		spin_lock_irq(shost->host_lock);
4109
		vport->fc_flag &= ~FC_RSCN_DEFERRED;
4110
		spin_unlock_irq(shost->host_lock);
4111
		return 0;
4112
	}
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4113 4114 4115 4116
	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
		"RCV RSCN:        did:x%x/ste:x%x flg:x%x",
		ndlp->nlp_DID, vport->port_state, ndlp->nlp_flag);

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4117 4118 4119 4120
	spin_lock_irq(shost->host_lock);
	vport->fc_flag |= FC_RSCN_MODE;
	spin_unlock_irq(shost->host_lock);
	vport->fc_rscn_id_list[vport->fc_rscn_id_cnt++] = pcmd;
4121 4122
	/* Indicate we are done walking fc_rscn_id_list on this vport */
	vport->fc_rscn_flush = 0;
4123 4124 4125 4126 4127
	/*
	 * If we zero, cmdiocb->context2, the calling routine will
	 * not try to free it.
	 */
	cmdiocb->context2 = NULL;
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4128
	lpfc_set_disctmo(vport);
4129
	/* Send back ACC */
4130
	lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
4131
	/* send RECOVERY event for ALL nodes that match RSCN payload */
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4132 4133
	lpfc_rscn_recovery_check(vport);
	return lpfc_els_handle_rscn(vport);
4134 4135
}

4136
/**
4137
 * lpfc_els_handle_rscn - Handle rscn for a vport
4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149 4150 4151
 * @vport: pointer to a host virtual N_Port data structure.
 *
 * This routine handles the Registration State Configuration Notification
 * (RSCN) for a @vport. If login to NameServer does not exist, a new ndlp shall
 * be created and a Port Login (PLOGI) to the NameServer is issued. Otherwise,
 * if the ndlp to NameServer exists, a Common Transport (CT) command to the
 * NameServer shall be issued. If CT command to the NameServer fails to be
 * issued, the lpfc_els_flush_rscn() routine shall be invoked to clean up any
 * RSCN activities with the @vport.
 *
 * Return code
 *   0 - Cleaned up rscn on the @vport
 *   1 - Wait for plogi to name server before proceed
 **/
4152
int
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4153
lpfc_els_handle_rscn(struct lpfc_vport *vport)
4154 4155
{
	struct lpfc_nodelist *ndlp;
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4156
	struct lpfc_hba *phba = vport->phba;
4157

4158 4159 4160 4161 4162 4163
	/* Ignore RSCN if the port is being torn down. */
	if (vport->load_flag & FC_UNLOADING) {
		lpfc_els_flush_rscn(vport);
		return 0;
	}

4164
	/* Start timer for RSCN processing */
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4165
	lpfc_set_disctmo(vport);
4166 4167

	/* RSCN processed */
4168 4169 4170 4171
	lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
			 "0215 RSCN processed Data: x%x x%x x%x x%x\n",
			 vport->fc_flag, 0, vport->fc_rscn_id_cnt,
			 vport->port_state);
4172 4173

	/* To process RSCN, first compare RSCN data with NameServer */
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4174
	vport->fc_ns_retry = 0;
4175 4176
	vport->num_disc_nodes = 0;

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4177
	ndlp = lpfc_findnode_did(vport, NameServer_DID);
4178 4179
	if (ndlp && NLP_CHK_NODE_ACT(ndlp)
	    && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
4180
		/* Good ndlp, issue CT Request to NameServer */
4181
		if (lpfc_ns_cmd(vport, SLI_CTNS_GID_FT, 0, 0) == 0)
4182 4183
			/* Wait for NameServer query cmpl before we can
			   continue */
4184
			return 1;
4185 4186 4187
	} else {
		/* If login to NameServer does not exist, issue one */
		/* Good status, issue PLOGI to NameServer */
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4188
		ndlp = lpfc_findnode_did(vport, NameServer_DID);
4189
		if (ndlp && NLP_CHK_NODE_ACT(ndlp))
4190 4191
			/* Wait for NameServer login cmpl before we can
			   continue */
4192
			return 1;
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4193

4194 4195 4196 4197 4198 4199 4200 4201
		if (ndlp) {
			ndlp = lpfc_enable_node(vport, ndlp,
						NLP_STE_PLOGI_ISSUE);
			if (!ndlp) {
				lpfc_els_flush_rscn(vport);
				return 0;
			}
			ndlp->nlp_prev_state = NLP_STE_UNUSED_NODE;
4202
		} else {
4203 4204 4205 4206 4207
			ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
			if (!ndlp) {
				lpfc_els_flush_rscn(vport);
				return 0;
			}
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4208
			lpfc_nlp_init(vport, ndlp, NameServer_DID);
4209
			ndlp->nlp_prev_state = ndlp->nlp_state;
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4210
			lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
4211
		}
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		ndlp->nlp_type |= NLP_FABRIC;
		lpfc_issue_els_plogi(vport, NameServer_DID, 0);
		/* Wait for NameServer login cmpl before we can
		 * continue
		 */
		return 1;
4218 4219
	}

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4220
	lpfc_els_flush_rscn(vport);
4221
	return 0;
4222 4223
}

4224
/**
4225
 * lpfc_els_rcv_flogi - Process an unsolicited flogi iocb
4226 4227 4228 4229 4230 4231 4232 4233 4234 4235 4236 4237 4238 4239 4240 4241 4242 4243 4244 4245 4246 4247 4248
 * @vport: pointer to a host virtual N_Port data structure.
 * @cmdiocb: pointer to lpfc command iocb data structure.
 * @ndlp: pointer to a node-list data structure.
 *
 * This routine processes Fabric Login (FLOGI) IOCB received as an ELS
 * unsolicited event. An unsolicited FLOGI can be received in a point-to-
 * point topology. As an unsolicited FLOGI should not be received in a loop
 * mode, any unsolicited FLOGI received in loop mode shall be ignored. The
 * lpfc_check_sparm() routine is invoked to check the parameters in the
 * unsolicited FLOGI. If parameters validation failed, the routine
 * lpfc_els_rsp_reject() shall be called with reject reason code set to
 * LSEXP_SPARM_OPTIONS to reject the FLOGI. Otherwise, the Port WWN in the
 * FLOGI shall be compared with the Port WWN of the @vport to determine who
 * will initiate PLOGI. The higher lexicographical value party shall has
 * higher priority (as the winning port) and will initiate PLOGI and
 * communicate Port_IDs (Addresses) for both nodes in PLOGI. The result
 * of this will be marked in the @vport fc_flag field with FC_PT2PT_PLOGI
 * and then the lpfc_els_rsp_acc() routine is invoked to accept the FLOGI.
 *
 * Return code
 *   0 - Successfully processed the unsolicited flogi
 *   1 - Failed to process the unsolicited flogi
 **/
4249
static int
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4250
lpfc_els_rcv_flogi(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
4251
		   struct lpfc_nodelist *ndlp)
4252
{
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4253 4254
	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
	struct lpfc_hba  *phba = vport->phba;
4255 4256 4257 4258 4259 4260 4261 4262 4263 4264 4265 4266 4267 4268
	struct lpfc_dmabuf *pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
	uint32_t *lp = (uint32_t *) pcmd->virt;
	IOCB_t *icmd = &cmdiocb->iocb;
	struct serv_parm *sp;
	LPFC_MBOXQ_t *mbox;
	struct ls_rjt stat;
	uint32_t cmd, did;
	int rc;

	cmd = *lp++;
	sp = (struct serv_parm *) lp;

	/* FLOGI received */

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4269
	lpfc_set_disctmo(vport);
4270 4271 4272 4273 4274 4275 4276

	if (phba->fc_topology == TOPOLOGY_LOOP) {
		/* We should never receive a FLOGI in loop mode, ignore it */
		did = icmd->un.elsreq64.remoteID;

		/* An FLOGI ELS command <elsCmd> was received from DID <did> in
		   Loop Mode */
4277 4278 4279 4280
		lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
				 "0113 An FLOGI ELS command x%x was "
				 "received from DID x%x in Loop Mode\n",
				 cmd, did);
4281
		return 1;
4282 4283 4284 4285
	}

	did = Fabric_DID;

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4286
	if ((lpfc_check_sparm(vport, ndlp, sp, CLASS3))) {
4287 4288 4289 4290
		/* For a FLOGI we accept, then if our portname is greater
		 * then the remote portname we initiate Nport login.
		 */

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4291
		rc = memcmp(&vport->fc_portname, &sp->portName,
4292
			    sizeof(struct lpfc_name));
4293 4294

		if (!rc) {
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4295 4296
			mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
			if (!mbox)
4297
				return 1;
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4298

4299 4300 4301 4302 4303 4304
			lpfc_linkdown(phba);
			lpfc_init_link(phba, mbox,
				       phba->cfg_topology,
				       phba->cfg_link_speed);
			mbox->mb.un.varInitLnk.lipsr_AL_PA = 0;
			mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
4305
			mbox->vport = vport;
4306
			rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
4307
			lpfc_set_loopback_flag(phba);
4308
			if (rc == MBX_NOT_FINISHED) {
4309
				mempool_free(mbox, phba->mbox_mem_pool);
4310
			}
4311
			return 1;
4312
		} else if (rc > 0) {	/* greater than */
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4313 4314 4315
			spin_lock_irq(shost->host_lock);
			vport->fc_flag |= FC_PT2PT_PLOGI;
			spin_unlock_irq(shost->host_lock);
4316
		}
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4317 4318 4319 4320
		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);
4321 4322 4323 4324 4325 4326
	} 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;
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4327 4328
		lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
			NULL);
4329
		return 1;
4330 4331 4332
	}

	/* Send back ACC */
4333
	lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp, NULL);
4334

4335
	return 0;
4336 4337
}

4338
/**
4339
 * lpfc_els_rcv_rnid - Process an unsolicited rnid iocb
4340 4341 4342 4343 4344 4345 4346 4347 4348 4349 4350 4351 4352 4353
 * @vport: pointer to a host virtual N_Port data structure.
 * @cmdiocb: pointer to lpfc command iocb data structure.
 * @ndlp: pointer to a node-list data structure.
 *
 * This routine processes Request Node Identification Data (RNID) IOCB
 * received as an ELS unsolicited event. Only when the RNID specified format
 * 0x0 or 0xDF (Topology Discovery Specific Node Identification Data)
 * present, this routine will invoke the lpfc_els_rsp_rnid_acc() routine to
 * Accept (ACC) the RNID ELS command. All the other RNID formats are
 * rejected by invoking the lpfc_els_rsp_reject() routine.
 *
 * Return code
 *   0 - Successfully processed rnid iocb (currently always return 0)
 **/
4354
static int
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4355 4356
lpfc_els_rcv_rnid(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
		  struct lpfc_nodelist *ndlp)
4357 4358 4359 4360 4361 4362 4363 4364 4365 4366 4367 4368 4369 4370 4371 4372 4373 4374 4375 4376 4377 4378
{
	struct lpfc_dmabuf *pcmd;
	uint32_t *lp;
	IOCB_t *icmd;
	RNID *rn;
	struct ls_rjt stat;
	uint32_t cmd, did;

	icmd = &cmdiocb->iocb;
	did = icmd->un.elsreq64.remoteID;
	pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
	lp = (uint32_t *) pcmd->virt;

	cmd = *lp++;
	rn = (RNID *) lp;

	/* RNID received */

	switch (rn->Format) {
	case 0:
	case RNID_TOPOLOGY_DISC:
		/* Send back ACC */
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4379
		lpfc_els_rsp_rnid_acc(vport, rn->Format, cmdiocb, ndlp);
4380 4381 4382 4383 4384 4385 4386
		break;
	default:
		/* Reject this request because format not supported */
		stat.un.b.lsRjtRsvd0 = 0;
		stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
		stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
		stat.un.b.vendorUnique = 0;
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4387 4388
		lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
			NULL);
4389
	}
4390
	return 0;
4391 4392
}

4393
/**
4394
 * lpfc_els_rcv_lirr - Process an unsolicited lirr iocb
4395 4396 4397 4398 4399 4400 4401 4402 4403 4404 4405
 * @vport: pointer to a host virtual N_Port data structure.
 * @cmdiocb: pointer to lpfc command iocb data structure.
 * @ndlp: pointer to a node-list data structure.
 *
 * This routine processes a Link Incident Report Registration(LIRR) IOCB
 * received as an ELS unsolicited event. Currently, this function just invokes
 * the lpfc_els_rsp_reject() routine to reject the LIRR IOCB unconditionally.
 *
 * Return code
 *   0 - Successfully processed lirr iocb (currently always return 0)
 **/
4406
static int
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4407 4408
lpfc_els_rcv_lirr(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
		  struct lpfc_nodelist *ndlp)
4409 4410 4411 4412 4413 4414 4415 4416
{
	struct ls_rjt stat;

	/* For now, unconditionally reject this command */
	stat.un.b.lsRjtRsvd0 = 0;
	stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
	stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
	stat.un.b.vendorUnique = 0;
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4417
	lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
4418 4419 4420
	return 0;
}

4421
/**
4422
 * lpfc_els_rsp_rps_acc - Completion callbk func for MBX_READ_LNK_STAT mbox cmd
4423 4424 4425 4426 4427 4428 4429 4430 4431 4432 4433 4434 4435 4436 4437 4438 4439
 * @phba: pointer to lpfc hba data structure.
 * @pmb: pointer to the driver internal queue element for mailbox command.
 *
 * This routine is the completion callback function for the MBX_READ_LNK_STAT
 * mailbox command. This callback function is to actually send the Accept
 * (ACC) response to a Read Port Status (RPS) unsolicited IOCB event. It
 * collects the link statistics from the completion of the MBX_READ_LNK_STAT
 * mailbox command, constructs the RPS response with the link statistics
 * collected, and then invokes the lpfc_sli_issue_iocb() routine to send ACC
 * response to the RPS.
 *
 * 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 RPS Accept Response ELS IOCB command.
 *
 **/
4440
static void
4441
lpfc_els_rsp_rps_acc(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
4442
{
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4443 4444
	struct lpfc_sli *psli = &phba->sli;
	struct lpfc_sli_ring *pring = &psli->ring[LPFC_ELS_RING];
4445 4446 4447 4448 4449 4450 4451 4452 4453 4454 4455 4456 4457
	MAILBOX_t *mb;
	IOCB_t *icmd;
	RPS_RSP *rps_rsp;
	uint8_t *pcmd;
	struct lpfc_iocbq *elsiocb;
	struct lpfc_nodelist *ndlp;
	uint16_t xri, status;
	uint32_t cmdsize;

	mb = &pmb->mb;

	ndlp = (struct lpfc_nodelist *) pmb->context2;
	xri = (uint16_t) ((unsigned long)(pmb->context1));
4458 4459
	pmb->context1 = NULL;
	pmb->context2 = NULL;
4460 4461

	if (mb->mbxStatus) {
4462
		mempool_free(pmb, phba->mbox_mem_pool);
4463 4464 4465 4466
		return;
	}

	cmdsize = sizeof(RPS_RSP) + sizeof(uint32_t);
4467
	mempool_free(pmb, phba->mbox_mem_pool);
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4468 4469 4470
	elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
				     lpfc_max_els_tries, ndlp,
				     ndlp->nlp_DID, ELS_CMD_ACC);
4471 4472

	/* Decrement the ndlp reference count from previous mbox command */
4473
	lpfc_nlp_put(ndlp);
4474

4475
	if (!elsiocb)
4476 4477 4478 4479 4480 4481 4482
		return;

	icmd = &elsiocb->iocb;
	icmd->ulpContext = xri;

	pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
	*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
4483
	pcmd += sizeof(uint32_t); /* Skip past command */
4484 4485 4486 4487 4488 4489
	rps_rsp = (RPS_RSP *)pcmd;

	if (phba->fc_topology != TOPOLOGY_LOOP)
		status = 0x10;
	else
		status = 0x8;
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4490
	if (phba->pport->fc_flag & FC_FABRIC)
4491 4492 4493
		status |= 0x4;

	rps_rsp->rsvd1 = 0;
4494 4495 4496 4497 4498 4499 4500
	rps_rsp->portStatus = cpu_to_be16(status);
	rps_rsp->linkFailureCnt = cpu_to_be32(mb->un.varRdLnk.linkFailureCnt);
	rps_rsp->lossSyncCnt = cpu_to_be32(mb->un.varRdLnk.lossSyncCnt);
	rps_rsp->lossSignalCnt = cpu_to_be32(mb->un.varRdLnk.lossSignalCnt);
	rps_rsp->primSeqErrCnt = cpu_to_be32(mb->un.varRdLnk.primSeqErrCnt);
	rps_rsp->invalidXmitWord = cpu_to_be32(mb->un.varRdLnk.invalidXmitWord);
	rps_rsp->crcCnt = cpu_to_be32(mb->un.varRdLnk.crcCnt);
4501
	/* Xmit ELS RPS ACC response tag <ulpIoTag> */
4502 4503 4504 4505 4506 4507
	lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_ELS,
			 "0118 Xmit ELS RPS ACC response tag x%x xri x%x, "
			 "did x%x, nlp_flag x%x, nlp_state x%x, rpi x%x\n",
			 elsiocb->iotag, elsiocb->iocb.ulpContext,
			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
			 ndlp->nlp_rpi);
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4508
	elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
4509
	phba->fc_stat.elsXmitACC++;
4510
	if (lpfc_sli_issue_iocb(phba, pring, elsiocb, 0) == IOCB_ERROR)
4511 4512 4513 4514
		lpfc_els_free_iocb(phba, elsiocb);
	return;
}

4515
/**
4516
 * lpfc_els_rcv_rps - Process an unsolicited rps iocb
4517 4518 4519 4520 4521 4522 4523 4524 4525 4526 4527 4528 4529 4530 4531 4532
 * @vport: pointer to a host virtual N_Port data structure.
 * @cmdiocb: pointer to lpfc command iocb data structure.
 * @ndlp: pointer to a node-list data structure.
 *
 * This routine processes Read Port Status (RPS) IOCB received as an
 * ELS unsolicited event. It first checks the remote port state. If the
 * remote port is not in NLP_STE_UNMAPPED_NODE state or NLP_STE_MAPPED_NODE
 * state, it invokes the lpfc_els_rsp_reject() routine to send the reject
 * response. Otherwise, it issue the MBX_READ_LNK_STAT mailbox command
 * for reading the HBA link statistics. It is for the callback function,
 * lpfc_els_rsp_rps_acc(), set to the MBX_READ_LNK_STAT mailbox command
 * to actually sending out RPS Accept (ACC) response.
 *
 * Return codes
 *   0 - Successfully processed rps iocb (currently always return 0)
 **/
4533
static int
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4534 4535
lpfc_els_rcv_rps(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
		 struct lpfc_nodelist *ndlp)
4536
{
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4537
	struct lpfc_hba *phba = vport->phba;
4538
	uint32_t *lp;
4539 4540 4541 4542 4543 4544
	uint8_t flag;
	LPFC_MBOXQ_t *mbox;
	struct lpfc_dmabuf *pcmd;
	RPS *rps;
	struct ls_rjt stat;

4545
	if ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
4546 4547 4548
	    (ndlp->nlp_state != NLP_STE_MAPPED_NODE))
		/* reject the unsolicited RPS request and done with it */
		goto reject_out;
4549 4550 4551 4552 4553 4554 4555 4556

	pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
	lp = (uint32_t *) pcmd->virt;
	flag = (be32_to_cpu(*lp++) & 0xf);
	rps = (RPS *) lp;

	if ((flag == 0) ||
	    ((flag == 1) && (be32_to_cpu(rps->un.portNum) == 0)) ||
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4557
	    ((flag == 2) && (memcmp(&rps->un.portName, &vport->fc_portname,
4558
				    sizeof(struct lpfc_name)) == 0))) {
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4559

4560 4561
		printk("Fix me....\n");
		dump_stack();
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4562 4563
		mbox = mempool_alloc(phba->mbox_mem_pool, GFP_ATOMIC);
		if (mbox) {
4564 4565
			lpfc_read_lnk_stat(phba, mbox);
			mbox->context1 =
4566
			    (void *)((unsigned long) cmdiocb->iocb.ulpContext);
4567
			mbox->context2 = lpfc_nlp_get(ndlp);
4568
			mbox->vport = vport;
4569
			mbox->mbox_cmpl = lpfc_els_rsp_rps_acc;
4570
			if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
4571
				!= MBX_NOT_FINISHED)
4572 4573
				/* Mbox completion will send ELS Response */
				return 0;
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			/* Decrement reference count used for the failed mbox
			 * command.
			 */
4577
			lpfc_nlp_put(ndlp);
4578 4579 4580
			mempool_free(mbox, phba->mbox_mem_pool);
		}
	}
4581 4582 4583

reject_out:
	/* issue rejection response */
4584 4585 4586 4587
	stat.un.b.lsRjtRsvd0 = 0;
	stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
	stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
	stat.un.b.vendorUnique = 0;
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4588
	lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
4589 4590 4591
	return 0;
}

4592
/**
4593
 * lpfc_els_rsp_rpl_acc - Issue an accept rpl els command
4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604 4605 4606 4607 4608 4609 4610
 * @vport: pointer to a host virtual N_Port data structure.
 * @cmdsize: size of the ELS command.
 * @oldiocb: pointer to the original lpfc command iocb data structure.
 * @ndlp: pointer to a node-list data structure.
 *
 * This routine issuees an Accept (ACC) Read Port List (RPL) ELS command.
 * It is to be called by the lpfc_els_rcv_rpl() routine to accept the RPL.
 *
 * 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 RPL Accept Response ELS command.
 *
 * Return code
 *   0 - Successfully issued ACC RPL ELS command
 *   1 - Failed to issue ACC RPL ELS command
 **/
4611
static int
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4612 4613
lpfc_els_rsp_rpl_acc(struct lpfc_vport *vport, uint16_t cmdsize,
		     struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp)
4614
{
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4615 4616
	struct lpfc_hba *phba = vport->phba;
	IOCB_t *icmd, *oldcmd;
4617 4618
	RPL_RSP rpl_rsp;
	struct lpfc_iocbq *elsiocb;
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4619 4620
	struct lpfc_sli *psli = &phba->sli;
	struct lpfc_sli_ring *pring = &psli->ring[LPFC_ELS_RING];
4621
	uint8_t *pcmd;
4622

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4623 4624
	elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
				     ndlp->nlp_DID, ELS_CMD_ACC);
4625

4626
	if (!elsiocb)
4627
		return 1;
4628

4629 4630 4631 4632 4633 4634
	icmd = &elsiocb->iocb;
	oldcmd = &oldiocb->iocb;
	icmd->ulpContext = oldcmd->ulpContext;	/* Xri */

	pcmd = (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
	*((uint32_t *) (pcmd)) = ELS_CMD_ACC;
4635
	pcmd += sizeof(uint16_t);
4636 4637 4638 4639 4640 4641 4642
	*((uint16_t *)(pcmd)) = be16_to_cpu(cmdsize);
	pcmd += sizeof(uint16_t);

	/* Setup the RPL ACC payload */
	rpl_rsp.listLen = be32_to_cpu(1);
	rpl_rsp.index = 0;
	rpl_rsp.port_num_blk.portNum = 0;
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	rpl_rsp.port_num_blk.portID = be32_to_cpu(vport->fc_myDID);
	memcpy(&rpl_rsp.port_num_blk.portName, &vport->fc_portname,
4645 4646 4647
	    sizeof(struct lpfc_name));
	memcpy(pcmd, &rpl_rsp, cmdsize - sizeof(uint32_t));
	/* Xmit ELS RPL ACC response tag <ulpIoTag> */
4648 4649 4650 4651 4652 4653 4654
	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
			 "0120 Xmit ELS RPL ACC response tag x%x "
			 "xri x%x, did x%x, nlp_flag x%x, nlp_state x%x, "
			 "rpi x%x\n",
			 elsiocb->iotag, elsiocb->iocb.ulpContext,
			 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
			 ndlp->nlp_rpi);
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4655
	elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
4656 4657 4658 4659 4660 4661 4662 4663
	phba->fc_stat.elsXmitACC++;
	if (lpfc_sli_issue_iocb(phba, pring, elsiocb, 0) == IOCB_ERROR) {
		lpfc_els_free_iocb(phba, elsiocb);
		return 1;
	}
	return 0;
}

4664
/**
4665
 * lpfc_els_rcv_rpl - Process an unsolicited rpl iocb
4666 4667 4668 4669 4670 4671 4672 4673 4674 4675 4676 4677 4678 4679
 * @vport: pointer to a host virtual N_Port data structure.
 * @cmdiocb: pointer to lpfc command iocb data structure.
 * @ndlp: pointer to a node-list data structure.
 *
 * This routine processes Read Port List (RPL) IOCB received as an ELS
 * unsolicited event. It first checks the remote port state. If the remote
 * port is not in NLP_STE_UNMAPPED_NODE and NLP_STE_MAPPED_NODE states, it
 * invokes the lpfc_els_rsp_reject() routine to send reject response.
 * Otherwise, this routine then invokes the lpfc_els_rsp_rpl_acc() routine
 * to accept the RPL.
 *
 * Return code
 *   0 - Successfully processed rpl iocb (currently always return 0)
 **/
4680
static int
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4681 4682
lpfc_els_rcv_rpl(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
		 struct lpfc_nodelist *ndlp)
4683 4684 4685 4686 4687 4688 4689 4690
{
	struct lpfc_dmabuf *pcmd;
	uint32_t *lp;
	uint32_t maxsize;
	uint16_t cmdsize;
	RPL *rpl;
	struct ls_rjt stat;

4691 4692
	if ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
	    (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
4693
		/* issue rejection response */
4694 4695 4696 4697
		stat.un.b.lsRjtRsvd0 = 0;
		stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
		stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
		stat.un.b.vendorUnique = 0;
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4698 4699
		lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
			NULL);
4700 4701
		/* rejected the unsolicited RPL request and done with it */
		return 0;
4702 4703
	}

4704 4705
	pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
	lp = (uint32_t *) pcmd->virt;
4706
	rpl = (RPL *) (lp + 1);
4707

4708
	maxsize = be32_to_cpu(rpl->maxsize);
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	/* We support only one port */
	if ((rpl->index == 0) &&
	    ((maxsize == 0) ||
	     ((maxsize * sizeof(uint32_t)) >= sizeof(RPL_RSP)))) {
		cmdsize = sizeof(uint32_t) + sizeof(RPL_RSP);
4715
	} else {
4716 4717
		cmdsize = sizeof(uint32_t) + maxsize * sizeof(uint32_t);
	}
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4718
	lpfc_els_rsp_rpl_acc(vport, cmdsize, cmdiocb, ndlp);
4719 4720 4721 4722

	return 0;
}

4723
/**
4724
 * lpfc_els_rcv_farp - Process an unsolicited farp request els command
4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736 4737 4738 4739 4740 4741 4742 4743 4744 4745 4746
 * @vport: pointer to a virtual N_Port data structure.
 * @cmdiocb: pointer to lpfc command iocb data structure.
 * @ndlp: pointer to a node-list data structure.
 *
 * This routine processes Fibre Channel Address Resolution Protocol
 * (FARP) Request IOCB received as an ELS unsolicited event. Currently,
 * the lpfc driver only supports matching on WWPN or WWNN for FARP. As such,
 * FARP_MATCH_PORT flag and FARP_MATCH_NODE flag are checked against the
 * Match Flag in the FARP request IOCB: if FARP_MATCH_PORT flag is set, the
 * remote PortName is compared against the FC PortName stored in the @vport
 * data structure; if FARP_MATCH_NODE flag is set, the remote NodeName is
 * compared against the FC NodeName stored in the @vport data structure.
 * If any of these matches and the FARP_REQUEST_FARPR flag is set in the
 * FARP request IOCB Response Flag, the lpfc_issue_els_farpr() routine is
 * invoked to send out FARP Response to the remote node. Before sending the
 * FARP Response, however, the FARP_REQUEST_PLOGI flag is check in the FARP
 * request IOCB Response Flag and, if it is set, the lpfc_issue_els_plogi()
 * routine is invoked to log into the remote port first.
 *
 * Return code
 *   0 - Either the FARP Match Mode not supported or successfully processed
 **/
4747
static int
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4748 4749
lpfc_els_rcv_farp(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
		  struct lpfc_nodelist *ndlp)
4750 4751 4752 4753 4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764
{
	struct lpfc_dmabuf *pcmd;
	uint32_t *lp;
	IOCB_t *icmd;
	FARP *fp;
	uint32_t cmd, cnt, did;

	icmd = &cmdiocb->iocb;
	did = icmd->un.elsreq64.remoteID;
	pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
	lp = (uint32_t *) pcmd->virt;

	cmd = *lp++;
	fp = (FARP *) lp;
	/* FARP-REQ received from DID <did> */
4765 4766
	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
			 "0601 FARP-REQ received from DID x%x\n", did);
4767 4768
	/* We will only support match on WWPN or WWNN */
	if (fp->Mflags & ~(FARP_MATCH_NODE | FARP_MATCH_PORT)) {
4769
		return 0;
4770 4771 4772 4773 4774
	}

	cnt = 0;
	/* If this FARP command is searching for my portname */
	if (fp->Mflags & FARP_MATCH_PORT) {
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4775
		if (memcmp(&fp->RportName, &vport->fc_portname,
4776
			   sizeof(struct lpfc_name)) == 0)
4777 4778 4779 4780 4781
			cnt = 1;
	}

	/* If this FARP command is searching for my nodename */
	if (fp->Mflags & FARP_MATCH_NODE) {
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4782
		if (memcmp(&fp->RnodeName, &vport->fc_nodename,
4783
			   sizeof(struct lpfc_name)) == 0)
4784 4785 4786 4787 4788 4789 4790 4791
			cnt = 1;
	}

	if (cnt) {
		if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
		   (ndlp->nlp_state == NLP_STE_MAPPED_NODE)) {
			/* Log back into the node before sending the FARP. */
			if (fp->Rflags & FARP_REQUEST_PLOGI) {
4792
				ndlp->nlp_prev_state = ndlp->nlp_state;
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4793
				lpfc_nlp_set_state(vport, ndlp,
4794
						   NLP_STE_PLOGI_ISSUE);
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4795
				lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
4796 4797 4798
			}

			/* Send a FARP response to that node */
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4799 4800
			if (fp->Rflags & FARP_REQUEST_FARPR)
				lpfc_issue_els_farpr(vport, did, 0);
4801 4802
		}
	}
4803
	return 0;
4804 4805
}

4806
/**
4807
 * lpfc_els_rcv_farpr - Process an unsolicited farp response iocb
4808 4809 4810 4811 4812 4813 4814 4815 4816 4817 4818 4819
 * @vport: pointer to a host virtual N_Port data structure.
 * @cmdiocb: pointer to lpfc command iocb data structure.
 * @ndlp: pointer to a node-list data structure.
 *
 * This routine processes Fibre Channel Address Resolution Protocol
 * Response (FARPR) IOCB received as an ELS unsolicited event. It simply
 * invokes the lpfc_els_rsp_acc() routine to the remote node to accept
 * the FARP response request.
 *
 * Return code
 *   0 - Successfully processed FARPR IOCB (currently always return 0)
 **/
4820
static int
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4821 4822
lpfc_els_rcv_farpr(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
		   struct lpfc_nodelist  *ndlp)
4823 4824 4825 4826 4827 4828 4829 4830 4831 4832 4833 4834 4835
{
	struct lpfc_dmabuf *pcmd;
	uint32_t *lp;
	IOCB_t *icmd;
	uint32_t cmd, did;

	icmd = &cmdiocb->iocb;
	did = icmd->un.elsreq64.remoteID;
	pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
	lp = (uint32_t *) pcmd->virt;

	cmd = *lp++;
	/* FARP-RSP received from DID <did> */
4836 4837
	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
			 "0600 FARP-RSP received from DID x%x\n", did);
4838
	/* ACCEPT the Farp resp request */
4839
	lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
4840 4841 4842 4843

	return 0;
}

4844
/**
4845
 * lpfc_els_rcv_fan - Process an unsolicited fan iocb command
4846 4847 4848 4849 4850 4851 4852 4853 4854 4855 4856 4857 4858 4859 4860 4861 4862
 * @vport: pointer to a host virtual N_Port data structure.
 * @cmdiocb: pointer to lpfc command iocb data structure.
 * @fan_ndlp: pointer to a node-list data structure.
 *
 * This routine processes a Fabric Address Notification (FAN) IOCB
 * command received as an ELS unsolicited event. The FAN ELS command will
 * only be processed on a physical port (i.e., the @vport represents the
 * physical port). The fabric NodeName and PortName from the FAN IOCB are
 * compared against those in the phba data structure. If any of those is
 * different, the lpfc_initial_flogi() routine is invoked to initialize
 * Fabric Login (FLOGI) to the fabric to start the discover over. Otherwise,
 * if both of those are identical, the lpfc_issue_fabric_reglogin() routine
 * is invoked to register login to the fabric.
 *
 * Return code
 *   0 - Successfully processed fan iocb (currently always return 0).
 **/
4863
static int
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4864 4865
lpfc_els_rcv_fan(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
		 struct lpfc_nodelist *fan_ndlp)
4866
{
4867
	struct lpfc_hba *phba = vport->phba;
4868
	uint32_t *lp;
4869
	FAN *fp;
4870

4871 4872 4873
	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS, "0265 FAN received\n");
	lp = (uint32_t *)((struct lpfc_dmabuf *)cmdiocb->context2)->virt;
	fp = (FAN *) ++lp;
4874
	/* FAN received; Fan does not have a reply sequence */
4875 4876
	if ((vport == phba->pport) &&
	    (vport->port_state == LPFC_LOCAL_CFG_LINK)) {
4877
		if ((memcmp(&phba->fc_fabparam.nodeName, &fp->FnodeName,
4878
			    sizeof(struct lpfc_name))) ||
4879
		    (memcmp(&phba->fc_fabparam.portName, &fp->FportName,
4880 4881
			    sizeof(struct lpfc_name)))) {
			/* This port has switched fabrics. FLOGI is required */
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4882
			lpfc_initial_flogi(vport);
4883 4884 4885 4886
		} else {
			/* FAN verified - skip FLOGI */
			vport->fc_myDID = vport->fc_prevDID;
			lpfc_issue_fabric_reglogin(vport);
4887
		}
4888
	}
4889
	return 0;
4890 4891
}

4892
/**
4893
 * lpfc_els_timeout - Handler funciton to the els timer
4894 4895 4896 4897 4898 4899 4900 4901
 * @ptr: holder for the timer function associated data.
 *
 * This routine is invoked by the ELS timer after timeout. It posts the ELS
 * timer timeout event by setting the WORKER_ELS_TMO bit to the work port
 * event bitmap and then invokes the lpfc_worker_wake_up() routine to wake
 * up the worker thread. It is for the worker thread to invoke the routine
 * lpfc_els_timeout_handler() to work on the posted event WORKER_ELS_TMO.
 **/
4902 4903 4904
void
lpfc_els_timeout(unsigned long ptr)
{
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4905 4906
	struct lpfc_vport *vport = (struct lpfc_vport *) ptr;
	struct lpfc_hba   *phba = vport->phba;
4907
	uint32_t tmo_posted;
4908 4909
	unsigned long iflag;

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4910
	spin_lock_irqsave(&vport->work_port_lock, iflag);
4911 4912
	tmo_posted = vport->work_port_events & WORKER_ELS_TMO;
	if (!tmo_posted)
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4913
		vport->work_port_events |= WORKER_ELS_TMO;
4914
	spin_unlock_irqrestore(&vport->work_port_lock, iflag);
4915

4916 4917
	if (!tmo_posted)
		lpfc_worker_wake_up(phba);
4918 4919 4920
	return;
}

4921
/**
4922
 * lpfc_els_timeout_handler - Process an els timeout event
4923 4924 4925 4926 4927 4928 4929
 * @vport: pointer to a virtual N_Port data structure.
 *
 * This routine is the actual handler function that processes an ELS timeout
 * event. It walks the ELS ring to get and abort all the IOCBs (except the
 * ABORT/CLOSE/FARP/FARPR/FDISC), which are associated with the @vport by
 * invoking the lpfc_sli_issue_abort_iotag() routine.
 **/
4930
void
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4931
lpfc_els_timeout_handler(struct lpfc_vport *vport)
4932
{
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4933
	struct lpfc_hba  *phba = vport->phba;
4934 4935 4936 4937
	struct lpfc_sli_ring *pring;
	struct lpfc_iocbq *tmp_iocb, *piocb;
	IOCB_t *cmd = NULL;
	struct lpfc_dmabuf *pcmd;
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4938
	uint32_t els_command = 0;
4939
	uint32_t timeout;
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4940
	uint32_t remote_ID = 0xffffffff;
4941

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4942
	spin_lock_irq(&phba->hbalock);
4943 4944 4945 4946 4947 4948 4949
	timeout = (uint32_t)(phba->fc_ratov << 1);

	pring = &phba->sli.ring[LPFC_ELS_RING];

	list_for_each_entry_safe(piocb, tmp_iocb, &pring->txcmplq, list) {
		cmd = &piocb->iocb;

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4950 4951 4952
		if ((piocb->iocb_flag & LPFC_IO_LIBDFC) != 0 ||
		    piocb->iocb.ulpCommand == CMD_ABORT_XRI_CN ||
		    piocb->iocb.ulpCommand == CMD_CLOSE_XRI_CN)
4953
			continue;
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4954 4955 4956 4957

		if (piocb->vport != vport)
			continue;

4958
		pcmd = (struct lpfc_dmabuf *) piocb->context2;
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4959 4960
		if (pcmd)
			els_command = *(uint32_t *) (pcmd->virt);
4961

4962 4963 4964 4965 4966
		if (els_command == ELS_CMD_FARP ||
		    els_command == ELS_CMD_FARPR ||
		    els_command == ELS_CMD_FDISC)
			continue;

4967
		if (piocb->drvrTimeout > 0) {
4968
			if (piocb->drvrTimeout >= timeout)
4969
				piocb->drvrTimeout -= timeout;
4970
			else
4971 4972 4973 4974
				piocb->drvrTimeout = 0;
			continue;
		}

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4975 4976
		remote_ID = 0xffffffff;
		if (cmd->ulpCommand != CMD_GEN_REQUEST64_CR)
4977
			remote_ID = cmd->un.elsreq64.remoteID;
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4978 4979 4980
		else {
			struct lpfc_nodelist *ndlp;
			ndlp = __lpfc_findnode_rpi(vport, cmd->ulpContext);
4981
			if (ndlp && NLP_CHK_NODE_ACT(ndlp))
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4982
				remote_ID = ndlp->nlp_DID;
4983
		}
4984 4985 4986 4987
		lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
				 "0127 ELS timeout Data: x%x x%x x%x "
				 "x%x\n", els_command,
				 remote_ID, cmd->ulpCommand, cmd->ulpIoTag);
4988
		lpfc_sli_issue_abort_iotag(phba, pring, piocb);
4989
	}
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4990
	spin_unlock_irq(&phba->hbalock);
4991

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4992 4993
	if (phba->sli.ring[LPFC_ELS_RING].txcmplq_cnt)
		mod_timer(&vport->els_tmofunc, jiffies + HZ * timeout);
4994 4995
}

4996
/**
4997
 * lpfc_els_flush_cmd - Clean up the outstanding els commands to a vport
4998 4999 5000 5001 5002 5003 5004 5005 5006 5007 5008 5009 5010 5011 5012 5013 5014 5015
 * @vport: pointer to a host virtual N_Port data structure.
 *
 * This routine is used to clean up all the outstanding ELS commands on a
 * @vport. It first aborts the @vport by invoking lpfc_fabric_abort_vport()
 * routine. After that, it walks the ELS transmit queue to remove all the
 * IOCBs with the @vport other than the QUE_RING and ABORT/CLOSE IOCBs. For
 * the IOCBs with a non-NULL completion callback function, the callback
 * function will be invoked with the status set to IOSTAT_LOCAL_REJECT and
 * un.ulpWord[4] set to IOERR_SLI_ABORTED. For IOCBs with a NULL completion
 * callback function, the IOCB will simply be released. Finally, it walks
 * the ELS transmit completion queue to issue an abort IOCB to any transmit
 * completion queue IOCB that is associated with the @vport and is not
 * an IOCB from libdfc (i.e., the management plane IOCBs that are not
 * part of the discovery state machine) out to HBA by invoking the
 * lpfc_sli_issue_abort_iotag() routine. Note that this function issues the
 * abort IOCB to any transmit completion queueed IOCB, it does not guarantee
 * the IOCBs are aborted when this function returns.
 **/
5016
void
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5017
lpfc_els_flush_cmd(struct lpfc_vport *vport)
5018
{
5019
	LIST_HEAD(completions);
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5020
	struct lpfc_hba  *phba = vport->phba;
5021
	struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
5022 5023
	struct lpfc_iocbq *tmp_iocb, *piocb;
	IOCB_t *cmd = NULL;
5024 5025

	lpfc_fabric_abort_vport(vport);
5026

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5027
	spin_lock_irq(&phba->hbalock);
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	list_for_each_entry_safe(piocb, tmp_iocb, &pring->txq, list) {
		cmd = &piocb->iocb;

		if (piocb->iocb_flag & LPFC_IO_LIBDFC) {
			continue;
		}

		/* Do not flush out the QUE_RING and ABORT/CLOSE iocbs */
5036 5037 5038 5039
		if (cmd->ulpCommand == CMD_QUE_RING_BUF_CN ||
		    cmd->ulpCommand == CMD_QUE_RING_BUF64_CN ||
		    cmd->ulpCommand == CMD_CLOSE_XRI_CN ||
		    cmd->ulpCommand == CMD_ABORT_XRI_CN)
5040 5041
			continue;

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5042 5043 5044
		if (piocb->vport != vport)
			continue;

5045
		list_move_tail(&piocb->list, &completions);
5046
		pring->txq_cnt--;
5047 5048 5049 5050 5051 5052 5053
	}

	list_for_each_entry_safe(piocb, tmp_iocb, &pring->txcmplq, list) {
		if (piocb->iocb_flag & LPFC_IO_LIBDFC) {
			continue;
		}

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		if (piocb->vport != vport)
			continue;

5057
		lpfc_sli_issue_abort_iotag(phba, pring, piocb);
5058
	}
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5059
	spin_unlock_irq(&phba->hbalock);
5060

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5061
	while (!list_empty(&completions)) {
5062 5063
		piocb = list_get_first(&completions, struct lpfc_iocbq, list);
		cmd = &piocb->iocb;
5064
		list_del_init(&piocb->list);
5065

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5066 5067 5068
		if (!piocb->iocb_cmpl)
			lpfc_sli_release_iocbq(phba, piocb);
		else {
5069 5070 5071
			cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
			cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
			(piocb->iocb_cmpl) (phba, piocb, piocb);
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5072
		}
5073 5074
	}

5075 5076 5077
	return;
}

5078
/**
5079
 * lpfc_els_flush_all_cmd - Clean up all the outstanding els commands to a HBA
5080 5081 5082 5083 5084 5085 5086 5087 5088 5089 5090 5091 5092 5093 5094
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine is used to clean up all the outstanding ELS commands on a
 * @phba. It first aborts the @phba by invoking the lpfc_fabric_abort_hba()
 * routine. After that, it walks the ELS transmit queue to remove all the
 * IOCBs to the @phba other than the QUE_RING and ABORT/CLOSE IOCBs. For
 * the IOCBs with the completion callback function associated, the callback
 * function will be invoked with the status set to IOSTAT_LOCAL_REJECT and
 * un.ulpWord[4] set to IOERR_SLI_ABORTED. For IOCBs without the completion
 * callback function associated, the IOCB will simply be released. Finally,
 * it walks the ELS transmit completion queue to issue an abort IOCB to any
 * transmit completion queue IOCB that is not an IOCB from libdfc (i.e., the
 * management plane IOCBs that are not part of the discovery state machine)
 * out to HBA by invoking the lpfc_sli_issue_abort_iotag() routine.
 **/
5095 5096 5097 5098 5099 5100 5101 5102 5103 5104 5105 5106 5107 5108 5109 5110 5111 5112 5113 5114 5115 5116 5117 5118 5119 5120 5121 5122 5123 5124 5125 5126 5127 5128 5129 5130 5131 5132 5133 5134 5135 5136 5137 5138
void
lpfc_els_flush_all_cmd(struct lpfc_hba  *phba)
{
	LIST_HEAD(completions);
	struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
	struct lpfc_iocbq *tmp_iocb, *piocb;
	IOCB_t *cmd = NULL;

	lpfc_fabric_abort_hba(phba);
	spin_lock_irq(&phba->hbalock);
	list_for_each_entry_safe(piocb, tmp_iocb, &pring->txq, list) {
		cmd = &piocb->iocb;
		if (piocb->iocb_flag & LPFC_IO_LIBDFC)
			continue;
		/* Do not flush out the QUE_RING and ABORT/CLOSE iocbs */
		if (cmd->ulpCommand == CMD_QUE_RING_BUF_CN ||
		    cmd->ulpCommand == CMD_QUE_RING_BUF64_CN ||
		    cmd->ulpCommand == CMD_CLOSE_XRI_CN ||
		    cmd->ulpCommand == CMD_ABORT_XRI_CN)
			continue;
		list_move_tail(&piocb->list, &completions);
		pring->txq_cnt--;
	}
	list_for_each_entry_safe(piocb, tmp_iocb, &pring->txcmplq, list) {
		if (piocb->iocb_flag & LPFC_IO_LIBDFC)
			continue;
		lpfc_sli_issue_abort_iotag(phba, pring, piocb);
	}
	spin_unlock_irq(&phba->hbalock);
	while (!list_empty(&completions)) {
		piocb = list_get_first(&completions, struct lpfc_iocbq, list);
		cmd = &piocb->iocb;
		list_del_init(&piocb->list);
		if (!piocb->iocb_cmpl)
			lpfc_sli_release_iocbq(phba, piocb);
		else {
			cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
			cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
			(piocb->iocb_cmpl) (phba, piocb, piocb);
		}
	}
	return;
}

5139
/**
5140
 * lpfc_send_els_failure_event - Posts an ELS command failure event
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 * @phba: Pointer to hba context object.
 * @cmdiocbp: Pointer to command iocb which reported error.
 * @rspiocbp: Pointer to response iocb which reported error.
 *
 * This function sends an event when there is an ELS command
 * failure.
 **/
void
lpfc_send_els_failure_event(struct lpfc_hba *phba,
			struct lpfc_iocbq *cmdiocbp,
			struct lpfc_iocbq *rspiocbp)
{
	struct lpfc_vport *vport = cmdiocbp->vport;
	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
	struct lpfc_lsrjt_event lsrjt_event;
	struct lpfc_fabric_event_header fabric_event;
	struct ls_rjt stat;
	struct lpfc_nodelist *ndlp;
	uint32_t *pcmd;

	ndlp = cmdiocbp->context1;
	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp))
		return;

	if (rspiocbp->iocb.ulpStatus == IOSTAT_LS_RJT) {
		lsrjt_event.header.event_type = FC_REG_ELS_EVENT;
		lsrjt_event.header.subcategory = LPFC_EVENT_LSRJT_RCV;
		memcpy(lsrjt_event.header.wwpn, &ndlp->nlp_portname,
			sizeof(struct lpfc_name));
		memcpy(lsrjt_event.header.wwnn, &ndlp->nlp_nodename,
			sizeof(struct lpfc_name));
		pcmd = (uint32_t *) (((struct lpfc_dmabuf *)
			cmdiocbp->context2)->virt);
		lsrjt_event.command = *pcmd;
		stat.un.lsRjtError = be32_to_cpu(rspiocbp->iocb.un.ulpWord[4]);
		lsrjt_event.reason_code = stat.un.b.lsRjtRsnCode;
		lsrjt_event.explanation = stat.un.b.lsRjtRsnCodeExp;
		fc_host_post_vendor_event(shost,
			fc_get_event_number(),
			sizeof(lsrjt_event),
			(char *)&lsrjt_event,
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			LPFC_NL_VENDOR_ID);
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		return;
	}
	if ((rspiocbp->iocb.ulpStatus == IOSTAT_NPORT_BSY) ||
		(rspiocbp->iocb.ulpStatus == IOSTAT_FABRIC_BSY)) {
		fabric_event.event_type = FC_REG_FABRIC_EVENT;
		if (rspiocbp->iocb.ulpStatus == IOSTAT_NPORT_BSY)
			fabric_event.subcategory = LPFC_EVENT_PORT_BUSY;
		else
			fabric_event.subcategory = LPFC_EVENT_FABRIC_BUSY;
		memcpy(fabric_event.wwpn, &ndlp->nlp_portname,
			sizeof(struct lpfc_name));
		memcpy(fabric_event.wwnn, &ndlp->nlp_nodename,
			sizeof(struct lpfc_name));
		fc_host_post_vendor_event(shost,
			fc_get_event_number(),
			sizeof(fabric_event),
			(char *)&fabric_event,
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			LPFC_NL_VENDOR_ID);
5201 5202 5203 5204 5205 5206
		return;
	}

}

/**
5207
 * lpfc_send_els_event - Posts unsolicited els event
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 * @vport: Pointer to vport object.
 * @ndlp: Pointer FC node object.
 * @cmd: ELS command code.
 *
 * This function posts an event when there is an incoming
 * unsolicited ELS command.
 **/
static void
lpfc_send_els_event(struct lpfc_vport *vport,
		    struct lpfc_nodelist *ndlp,
5218
		    uint32_t *payload)
5219
{
5220 5221
	struct lpfc_els_event_header *els_data = NULL;
	struct lpfc_logo_event *logo_data = NULL;
5222 5223
	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);

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	if (*payload == ELS_CMD_LOGO) {
		logo_data = kmalloc(sizeof(struct lpfc_logo_event), GFP_KERNEL);
		if (!logo_data) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
				"0148 Failed to allocate memory "
				"for LOGO event\n");
			return;
		}
		els_data = &logo_data->header;
	} else {
		els_data = kmalloc(sizeof(struct lpfc_els_event_header),
			GFP_KERNEL);
		if (!els_data) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
				"0149 Failed to allocate memory "
				"for ELS event\n");
			return;
		}
	}
	els_data->event_type = FC_REG_ELS_EVENT;
	switch (*payload) {
5245
	case ELS_CMD_PLOGI:
5246
		els_data->subcategory = LPFC_EVENT_PLOGI_RCV;
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		break;
	case ELS_CMD_PRLO:
5249
		els_data->subcategory = LPFC_EVENT_PRLO_RCV;
5250 5251
		break;
	case ELS_CMD_ADISC:
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		els_data->subcategory = LPFC_EVENT_ADISC_RCV;
		break;
	case ELS_CMD_LOGO:
		els_data->subcategory = LPFC_EVENT_LOGO_RCV;
		/* Copy the WWPN in the LOGO payload */
		memcpy(logo_data->logo_wwpn, &payload[2],
			sizeof(struct lpfc_name));
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		break;
	default:
5261
		kfree(els_data);
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		return;
	}
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	memcpy(els_data->wwpn, &ndlp->nlp_portname, sizeof(struct lpfc_name));
	memcpy(els_data->wwnn, &ndlp->nlp_nodename, sizeof(struct lpfc_name));
	if (*payload == ELS_CMD_LOGO) {
		fc_host_post_vendor_event(shost,
			fc_get_event_number(),
			sizeof(struct lpfc_logo_event),
			(char *)logo_data,
			LPFC_NL_VENDOR_ID);
		kfree(logo_data);
	} else {
		fc_host_post_vendor_event(shost,
			fc_get_event_number(),
			sizeof(struct lpfc_els_event_header),
			(char *)els_data,
			LPFC_NL_VENDOR_ID);
		kfree(els_data);
	}
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	return;
}


5286
/**
5287
 * lpfc_els_unsol_buffer - Process an unsolicited event data buffer
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 * @phba: pointer to lpfc hba data structure.
 * @pring: pointer to a SLI ring.
 * @vport: pointer to a host virtual N_Port data structure.
 * @elsiocb: pointer to lpfc els command iocb data structure.
 *
 * This routine is used for processing the IOCB associated with a unsolicited
 * event. It first determines whether there is an existing ndlp that matches
 * the DID from the unsolicited IOCB. If not, it will create a new one with
 * the DID from the unsolicited IOCB. The ELS command from the unsolicited
 * IOCB is then used to invoke the proper routine and to set up proper state
 * of the discovery state machine.
 **/
5300 5301
static void
lpfc_els_unsol_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
5302
		      struct lpfc_vport *vport, struct lpfc_iocbq *elsiocb)
5303
{
5304
	struct Scsi_Host  *shost;
5305 5306
	struct lpfc_nodelist *ndlp;
	struct ls_rjt stat;
5307
	uint32_t *payload;
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5308
	uint32_t cmd, did, newnode, rjt_err = 0;
5309
	IOCB_t *icmd = &elsiocb->iocb;
5310

5311
	if (!vport || !(elsiocb->context2))
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		goto dropit;
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5313

5314
	newnode = 0;
5315 5316
	payload = ((struct lpfc_dmabuf *)elsiocb->context2)->virt;
	cmd = *payload;
5317
	if ((phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) == 0)
5318
		lpfc_post_buffer(phba, pring, 1);
5319

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5320 5321 5322 5323 5324
	did = icmd->un.rcvels.remoteID;
	if (icmd->ulpStatus) {
		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
			"RCV Unsol ELS:  status:x%x/x%x did:x%x",
			icmd->ulpStatus, icmd->un.ulpWord[4], did);
5325
		goto dropit;
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5326
	}
5327 5328

	/* Check to see if link went down during discovery */
5329
	if (lpfc_els_chk_latt(vport))
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		goto dropit;

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	/* Ignore traffic recevied during vport shutdown. */
	if (vport->load_flag & FC_UNLOADING)
		goto dropit;

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5336
	ndlp = lpfc_findnode_did(vport, did);
5337
	if (!ndlp) {
5338
		/* Cannot find existing Fabric ndlp, so allocate a new one */
5339
		ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
5340
		if (!ndlp)
5341 5342
			goto dropit;

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5343
		lpfc_nlp_init(vport, ndlp, did);
5344
		lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
5345
		newnode = 1;
5346
		if ((did & Fabric_DID_MASK) == Fabric_DID_MASK)
5347
			ndlp->nlp_type |= NLP_FABRIC;
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	} else if (!NLP_CHK_NODE_ACT(ndlp)) {
		ndlp = lpfc_enable_node(vport, ndlp,
					NLP_STE_UNUSED_NODE);
		if (!ndlp)
			goto dropit;
		lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
		newnode = 1;
		if ((did & Fabric_DID_MASK) == Fabric_DID_MASK)
			ndlp->nlp_type |= NLP_FABRIC;
	} else if (ndlp->nlp_state == NLP_STE_UNUSED_NODE) {
		/* This is similar to the new node path */
		ndlp = lpfc_nlp_get(ndlp);
		if (!ndlp)
			goto dropit;
		lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
		newnode = 1;
5364
	}
5365 5366

	phba->fc_stat.elsRcvFrame++;
5367

5368
	elsiocb->context1 = lpfc_nlp_get(ndlp);
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5369
	elsiocb->vport = vport;
5370 5371 5372 5373 5374

	if ((cmd & ELS_CMD_MASK) == ELS_CMD_RSCN) {
		cmd &= ELS_CMD_MASK;
	}
	/* ELS command <elsCmd> received from NPORT <did> */
5375 5376 5377
	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
			 "0112 ELS command x%x received from NPORT x%x "
			 "Data: x%x\n", cmd, did, vport->port_state);
5378 5379
	switch (cmd) {
	case ELS_CMD_PLOGI:
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5380 5381 5382 5383
		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
			"RCV PLOGI:       did:x%x/ste:x%x flg:x%x",
			did, vport->port_state, ndlp->nlp_flag);

5384
		phba->fc_stat.elsRcvPLOGI++;
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5385 5386
		ndlp = lpfc_plogi_confirm_nport(phba, payload, ndlp);

5387
		lpfc_send_els_event(vport, ndlp, payload);
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5388
		if (vport->port_state < LPFC_DISC_AUTH) {
5389 5390 5391 5392 5393 5394 5395 5396 5397
			if (!(phba->pport->fc_flag & FC_PT2PT) ||
				(phba->pport->fc_flag & FC_PT2PT_PLOGI)) {
				rjt_err = LSRJT_UNABLE_TPC;
				break;
			}
			/* We get here, and drop thru, if we are PT2PT with
			 * another NPort and the other side has initiated
			 * the PLOGI before responding to our FLOGI.
			 */
5398
		}
5399 5400 5401 5402 5403 5404

		shost = lpfc_shost_from_vport(vport);
		spin_lock_irq(shost->host_lock);
		ndlp->nlp_flag &= ~NLP_TARGET_REMOVE;
		spin_unlock_irq(shost->host_lock);

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5405 5406
		lpfc_disc_state_machine(vport, ndlp, elsiocb,
					NLP_EVT_RCV_PLOGI);
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5407

5408 5409
		break;
	case ELS_CMD_FLOGI:
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5410 5411 5412 5413
		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
			"RCV FLOGI:       did:x%x/ste:x%x flg:x%x",
			did, vport->port_state, ndlp->nlp_flag);

5414
		phba->fc_stat.elsRcvFLOGI++;
5415
		lpfc_els_rcv_flogi(vport, elsiocb, ndlp);
5416
		if (newnode)
5417
			lpfc_nlp_put(ndlp);
5418 5419
		break;
	case ELS_CMD_LOGO:
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5420 5421 5422 5423
		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
			"RCV LOGO:        did:x%x/ste:x%x flg:x%x",
			did, vport->port_state, ndlp->nlp_flag);

5424
		phba->fc_stat.elsRcvLOGO++;
5425
		lpfc_send_els_event(vport, ndlp, payload);
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5426
		if (vport->port_state < LPFC_DISC_AUTH) {
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5427
			rjt_err = LSRJT_UNABLE_TPC;
5428 5429
			break;
		}
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5430
		lpfc_disc_state_machine(vport, ndlp, elsiocb, NLP_EVT_RCV_LOGO);
5431 5432
		break;
	case ELS_CMD_PRLO:
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5433 5434 5435 5436
		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
			"RCV PRLO:        did:x%x/ste:x%x flg:x%x",
			did, vport->port_state, ndlp->nlp_flag);

5437
		phba->fc_stat.elsRcvPRLO++;
5438
		lpfc_send_els_event(vport, ndlp, payload);
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5439
		if (vport->port_state < LPFC_DISC_AUTH) {
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5440
			rjt_err = LSRJT_UNABLE_TPC;
5441 5442
			break;
		}
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5443
		lpfc_disc_state_machine(vport, ndlp, elsiocb, NLP_EVT_RCV_PRLO);
5444 5445 5446
		break;
	case ELS_CMD_RSCN:
		phba->fc_stat.elsRcvRSCN++;
5447
		lpfc_els_rcv_rscn(vport, elsiocb, ndlp);
5448
		if (newnode)
5449
			lpfc_nlp_put(ndlp);
5450 5451
		break;
	case ELS_CMD_ADISC:
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5452 5453 5454 5455
		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
			"RCV ADISC:       did:x%x/ste:x%x flg:x%x",
			did, vport->port_state, ndlp->nlp_flag);

5456
		lpfc_send_els_event(vport, ndlp, payload);
5457
		phba->fc_stat.elsRcvADISC++;
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5458
		if (vport->port_state < LPFC_DISC_AUTH) {
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5459
			rjt_err = LSRJT_UNABLE_TPC;
5460 5461
			break;
		}
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5462 5463
		lpfc_disc_state_machine(vport, ndlp, elsiocb,
					NLP_EVT_RCV_ADISC);
5464 5465
		break;
	case ELS_CMD_PDISC:
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5466 5467 5468 5469
		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
			"RCV PDISC:       did:x%x/ste:x%x flg:x%x",
			did, vport->port_state, ndlp->nlp_flag);

5470
		phba->fc_stat.elsRcvPDISC++;
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5471
		if (vport->port_state < LPFC_DISC_AUTH) {
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5472
			rjt_err = LSRJT_UNABLE_TPC;
5473 5474
			break;
		}
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5475 5476
		lpfc_disc_state_machine(vport, ndlp, elsiocb,
					NLP_EVT_RCV_PDISC);
5477 5478
		break;
	case ELS_CMD_FARPR:
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5479 5480 5481 5482
		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
			"RCV FARPR:       did:x%x/ste:x%x flg:x%x",
			did, vport->port_state, ndlp->nlp_flag);

5483
		phba->fc_stat.elsRcvFARPR++;
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5484
		lpfc_els_rcv_farpr(vport, elsiocb, ndlp);
5485 5486
		break;
	case ELS_CMD_FARP:
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5487 5488 5489 5490
		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
			"RCV FARP:        did:x%x/ste:x%x flg:x%x",
			did, vport->port_state, ndlp->nlp_flag);

5491
		phba->fc_stat.elsRcvFARP++;
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5492
		lpfc_els_rcv_farp(vport, elsiocb, ndlp);
5493 5494
		break;
	case ELS_CMD_FAN:
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		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
			"RCV FAN:         did:x%x/ste:x%x flg:x%x",
			did, vport->port_state, ndlp->nlp_flag);

5499
		phba->fc_stat.elsRcvFAN++;
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5500
		lpfc_els_rcv_fan(vport, elsiocb, ndlp);
5501 5502
		break;
	case ELS_CMD_PRLI:
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		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
			"RCV PRLI:        did:x%x/ste:x%x flg:x%x",
			did, vport->port_state, ndlp->nlp_flag);

5507
		phba->fc_stat.elsRcvPRLI++;
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5508
		if (vport->port_state < LPFC_DISC_AUTH) {
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5509
			rjt_err = LSRJT_UNABLE_TPC;
5510 5511
			break;
		}
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5512
		lpfc_disc_state_machine(vport, ndlp, elsiocb, NLP_EVT_RCV_PRLI);
5513
		break;
5514
	case ELS_CMD_LIRR:
James Smart's avatar
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5515 5516 5517 5518
		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
			"RCV LIRR:        did:x%x/ste:x%x flg:x%x",
			did, vport->port_state, ndlp->nlp_flag);

5519
		phba->fc_stat.elsRcvLIRR++;
James Smart's avatar
James Smart committed
5520
		lpfc_els_rcv_lirr(vport, elsiocb, ndlp);
5521
		if (newnode)
5522
			lpfc_nlp_put(ndlp);
5523 5524
		break;
	case ELS_CMD_RPS:
James Smart's avatar
James Smart committed
5525 5526 5527 5528
		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
			"RCV RPS:         did:x%x/ste:x%x flg:x%x",
			did, vport->port_state, ndlp->nlp_flag);

5529
		phba->fc_stat.elsRcvRPS++;
James Smart's avatar
James Smart committed
5530
		lpfc_els_rcv_rps(vport, elsiocb, ndlp);
5531
		if (newnode)
5532
			lpfc_nlp_put(ndlp);
5533 5534
		break;
	case ELS_CMD_RPL:
James Smart's avatar
James Smart committed
5535 5536 5537 5538
		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
			"RCV RPL:         did:x%x/ste:x%x flg:x%x",
			did, vport->port_state, ndlp->nlp_flag);

5539
		phba->fc_stat.elsRcvRPL++;
James Smart's avatar
James Smart committed
5540
		lpfc_els_rcv_rpl(vport, elsiocb, ndlp);
5541
		if (newnode)
5542
			lpfc_nlp_put(ndlp);
5543
		break;
5544
	case ELS_CMD_RNID:
James Smart's avatar
James Smart committed
5545 5546 5547 5548
		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
			"RCV RNID:        did:x%x/ste:x%x flg:x%x",
			did, vport->port_state, ndlp->nlp_flag);

5549
		phba->fc_stat.elsRcvRNID++;
James Smart's avatar
James Smart committed
5550
		lpfc_els_rcv_rnid(vport, elsiocb, ndlp);
5551
		if (newnode)
5552
			lpfc_nlp_put(ndlp);
5553 5554
		break;
	default:
James Smart's avatar
James Smart committed
5555 5556 5557 5558
		lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
			"RCV ELS cmd:     cmd:x%x did:x%x/ste:x%x",
			cmd, did, vport->port_state);

5559
		/* Unsupported ELS command, reject */
James Smart's avatar
James Smart committed
5560
		rjt_err = LSRJT_INVALID_CMD;
5561 5562

		/* Unknown ELS command <elsCmd> received from NPORT <did> */
5563 5564 5565
		lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
				 "0115 Unknown ELS command x%x "
				 "received from NPORT x%x\n", cmd, did);
5566
		if (newnode)
5567
			lpfc_nlp_put(ndlp);
5568 5569 5570 5571 5572
		break;
	}

	/* check if need to LS_RJT received ELS cmd */
	if (rjt_err) {
5573
		memset(&stat, 0, sizeof(stat));
James Smart's avatar
James Smart committed
5574
		stat.un.b.lsRjtRsnCode = rjt_err;
5575
		stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
James Smart's avatar
James Smart committed
5576 5577
		lpfc_els_rsp_reject(vport, stat.un.lsRjtError, elsiocb, ndlp,
			NULL);
5578 5579
	}

5580 5581
	lpfc_nlp_put(elsiocb->context1);
	elsiocb->context1 = NULL;
5582 5583 5584
	return;

dropit:
5585 5586
	if (vport && !(vport->load_flag & FC_UNLOADING))
		lpfc_printf_log(phba, KERN_ERR, LOG_ELS,
5587
			"(%d):0111 Dropping received ELS cmd "
5588
			"Data: x%x x%x x%x\n",
5589
			vport->vpi, icmd->ulpStatus,
5590
			icmd->un.ulpWord[4], icmd->ulpTimeout);
5591 5592 5593
	phba->fc_stat.elsRcvDrop++;
}

5594
/**
5595
 * lpfc_find_vport_by_vpid - Find a vport on a HBA through vport identifier
5596 5597 5598 5599 5600 5601 5602 5603 5604 5605 5606
 * @phba: pointer to lpfc hba data structure.
 * @vpi: host virtual N_Port identifier.
 *
 * This routine finds a vport on a HBA (referred by @phba) through a
 * @vpi. The function walks the HBA's vport list and returns the address
 * of the vport with the matching @vpi.
 *
 * Return code
 *    NULL - No vport with the matching @vpi found
 *    Otherwise - Address to the vport with the matching @vpi.
 **/
5607 5608 5609 5610
static struct lpfc_vport *
lpfc_find_vport_by_vpid(struct lpfc_hba *phba, uint16_t vpi)
{
	struct lpfc_vport *vport;
5611
	unsigned long flags;
5612

5613
	spin_lock_irqsave(&phba->hbalock, flags);
5614
	list_for_each_entry(vport, &phba->port_list, listentry) {
5615 5616
		if (vport->vpi == vpi) {
			spin_unlock_irqrestore(&phba->hbalock, flags);
5617
			return vport;
5618
		}
5619
	}
5620
	spin_unlock_irqrestore(&phba->hbalock, flags);
5621 5622
	return NULL;
}
5623

5624
/**
5625
 * lpfc_els_unsol_event - Process an unsolicited event from an els sli ring
5626 5627 5628 5629 5630 5631 5632 5633 5634 5635
 * @phba: pointer to lpfc hba data structure.
 * @pring: pointer to a SLI ring.
 * @elsiocb: pointer to lpfc els iocb data structure.
 *
 * This routine is used to process an unsolicited event received from a SLI
 * (Service Level Interface) ring. The actual processing of the data buffer
 * associated with the unsolicited event is done by invoking the routine
 * lpfc_els_unsol_buffer() after properly set up the iocb buffer from the
 * SLI ring on which the unsolicited event was received.
 **/
5636 5637 5638 5639 5640 5641 5642
void
lpfc_els_unsol_event(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
		     struct lpfc_iocbq *elsiocb)
{
	struct lpfc_vport *vport = phba->pport;
	IOCB_t *icmd = &elsiocb->iocb;
	dma_addr_t paddr;
5643 5644 5645
	struct lpfc_dmabuf *bdeBuf1 = elsiocb->context2;
	struct lpfc_dmabuf *bdeBuf2 = elsiocb->context3;

5646
	elsiocb->context1 = NULL;
5647 5648
	elsiocb->context2 = NULL;
	elsiocb->context3 = NULL;
5649

5650 5651 5652 5653
	if (icmd->ulpStatus == IOSTAT_NEED_BUFFER) {
		lpfc_sli_hbqbuf_add_hbqs(phba, LPFC_ELS_HBQ);
	} else if (icmd->ulpStatus == IOSTAT_LOCAL_REJECT &&
	    (icmd->un.ulpWord[4] & 0xff) == IOERR_RCV_BUFFER_WAITING) {
5654 5655
		phba->fc_stat.NoRcvBuf++;
		/* Not enough posted buffers; Try posting more buffers */
5656
		if (!(phba->sli3_options & LPFC_SLI3_HBQ_ENABLED))
5657
			lpfc_post_buffer(phba, pring, 0);
5658 5659 5660
		return;
	}

5661 5662 5663 5664 5665 5666 5667 5668 5669 5670
	if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
	    (icmd->ulpCommand == CMD_IOCB_RCV_ELS64_CX ||
	     icmd->ulpCommand == CMD_IOCB_RCV_SEQ64_CX)) {
		if (icmd->unsli3.rcvsli3.vpi == 0xffff)
			vport = phba->pport;
		else {
			uint16_t vpi = icmd->unsli3.rcvsli3.vpi;
			vport = lpfc_find_vport_by_vpid(phba, vpi);
		}
	}
5671 5672 5673
	/* If there are no BDEs associated
	 * with this IOCB, there is nothing to do.
	 */
5674 5675 5676
	if (icmd->ulpBdeCount == 0)
		return;

5677 5678 5679
	/* type of ELS cmd is first 32bit word
	 * in packet
	 */
5680
	if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
5681
		elsiocb->context2 = bdeBuf1;
5682 5683 5684
	} else {
		paddr = getPaddr(icmd->un.cont64[0].addrHigh,
				 icmd->un.cont64[0].addrLow);
5685 5686
		elsiocb->context2 = lpfc_sli_ringpostbuf_get(phba, pring,
							     paddr);
5687 5688
	}

5689 5690 5691 5692 5693
	lpfc_els_unsol_buffer(phba, pring, vport, elsiocb);
	/*
	 * The different unsolicited event handlers would tell us
	 * if they are done with "mp" by setting context2 to NULL.
	 */
5694
	if (elsiocb->context2) {
5695 5696
		lpfc_in_buf_free(phba, (struct lpfc_dmabuf *)elsiocb->context2);
		elsiocb->context2 = NULL;
5697
	}
5698 5699

	/* RCV_ELS64_CX provide for 2 BDEs - process 2nd if included */
5700
	if ((phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) &&
5701
	    icmd->ulpBdeCount == 2) {
5702 5703
		elsiocb->context2 = bdeBuf2;
		lpfc_els_unsol_buffer(phba, pring, vport, elsiocb);
5704 5705
		/* free mp if we are done with it */
		if (elsiocb->context2) {
5706 5707 5708 5709 5710 5711
			lpfc_in_buf_free(phba, elsiocb->context2);
			elsiocb->context2 = NULL;
		}
	}
}

5712
/**
5713
 * lpfc_do_scr_ns_plogi - Issue a plogi to the name server for scr
5714 5715 5716 5717 5718 5719 5720 5721 5722 5723 5724
 * @phba: pointer to lpfc hba data structure.
 * @vport: pointer to a virtual N_Port data structure.
 *
 * This routine issues a Port Login (PLOGI) to the Name Server with
 * State Change Request (SCR) for a @vport. This routine will create an
 * ndlp for the Name Server associated to the @vport if such node does
 * not already exist. The PLOGI to Name Server is issued by invoking the
 * lpfc_issue_els_plogi() routine. If Fabric-Device Management Interface
 * (FDMI) is configured to the @vport, a FDMI node will be created and
 * the PLOGI to FDMI is issued by invoking lpfc_issue_els_plogi() routine.
 **/
5725 5726 5727 5728 5729 5730 5731 5732 5733 5734 5735 5736 5737 5738
void
lpfc_do_scr_ns_plogi(struct lpfc_hba *phba, struct lpfc_vport *vport)
{
	struct lpfc_nodelist *ndlp, *ndlp_fdmi;

	ndlp = lpfc_findnode_did(vport, NameServer_DID);
	if (!ndlp) {
		ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
		if (!ndlp) {
			if (phba->fc_topology == TOPOLOGY_LOOP) {
				lpfc_disc_start(vport);
				return;
			}
			lpfc_vport_set_state(vport, FC_VPORT_FAILED);
5739 5740
			lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
					 "0251 NameServer login: no memory\n");
5741 5742 5743
			return;
		}
		lpfc_nlp_init(vport, ndlp, NameServer_DID);
5744 5745 5746 5747 5748 5749 5750 5751 5752 5753 5754 5755
	} else if (!NLP_CHK_NODE_ACT(ndlp)) {
		ndlp = lpfc_enable_node(vport, ndlp, NLP_STE_UNUSED_NODE);
		if (!ndlp) {
			if (phba->fc_topology == TOPOLOGY_LOOP) {
				lpfc_disc_start(vport);
				return;
			}
			lpfc_vport_set_state(vport, FC_VPORT_FAILED);
			lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
					"0348 NameServer login: node freed\n");
			return;
		}
5756
	}
5757
	ndlp->nlp_type |= NLP_FABRIC;
5758 5759 5760 5761 5762

	lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);

	if (lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0)) {
		lpfc_vport_set_state(vport, FC_VPORT_FAILED);
5763 5764
		lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
				 "0252 Cannot issue NameServer login\n");
5765 5766 5767
		return;
	}

5768
	if (vport->cfg_fdmi_on) {
5769 5770 5771 5772 5773
		ndlp_fdmi = mempool_alloc(phba->nlp_mem_pool,
					  GFP_KERNEL);
		if (ndlp_fdmi) {
			lpfc_nlp_init(vport, ndlp_fdmi, FDMI_DID);
			ndlp_fdmi->nlp_type |= NLP_FABRIC;
5774 5775
			lpfc_nlp_set_state(vport, ndlp_fdmi,
				NLP_STE_PLOGI_ISSUE);
5776 5777 5778 5779 5780 5781 5782
			lpfc_issue_els_plogi(vport, ndlp_fdmi->nlp_DID,
					     0);
		}
	}
	return;
}

5783
/**
5784
 * lpfc_cmpl_reg_new_vport - Completion callback function to register new vport
5785 5786 5787 5788 5789 5790 5791 5792 5793 5794
 * @phba: pointer to lpfc hba data structure.
 * @pmb: pointer to the driver internal queue element for mailbox command.
 *
 * This routine is the completion callback function to register new vport
 * mailbox command. If the new vport mailbox command completes successfully,
 * the fabric registration login shall be performed on physical port (the
 * new vport created is actually a physical port, with VPI 0) or the port
 * login to Name Server for State Change Request (SCR) will be performed
 * on virtual port (real virtual port, with VPI greater than 0).
 **/
5795 5796 5797 5798 5799 5800 5801 5802
static void
lpfc_cmpl_reg_new_vport(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
{
	struct lpfc_vport *vport = pmb->vport;
	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
	struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) pmb->context2;
	MAILBOX_t *mb = &pmb->mb;

5803
	spin_lock_irq(shost->host_lock);
5804
	vport->fc_flag &= ~FC_VPORT_NEEDS_REG_VPI;
5805
	spin_unlock_irq(shost->host_lock);
5806 5807

	if (mb->mbxStatus) {
5808 5809 5810
		lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
				 "0915 Register VPI failed: 0x%x\n",
				 mb->mbxStatus);
5811 5812 5813 5814

		switch (mb->mbxStatus) {
		case 0x11:	/* unsupported feature */
		case 0x9603:	/* max_vpi exceeded */
5815
		case 0x9602:	/* Link event since CLEAR_LA */
5816 5817 5818 5819 5820 5821 5822 5823 5824 5825
			/* giving up on vport registration */
			lpfc_vport_set_state(vport, FC_VPORT_FAILED);
			spin_lock_irq(shost->host_lock);
			vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
			spin_unlock_irq(shost->host_lock);
			lpfc_can_disctmo(vport);
			break;
		default:
			/* Try to recover from this error */
			lpfc_mbx_unreg_vpi(vport);
5826
			spin_lock_irq(shost->host_lock);
5827
			vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
5828
			spin_unlock_irq(shost->host_lock);
5829 5830 5831 5832
			if (vport->port_type == LPFC_PHYSICAL_PORT)
				lpfc_initial_flogi(vport);
			else
				lpfc_initial_fdisc(vport);
5833 5834 5835 5836 5837 5838 5839 5840 5841
			break;
		}

	} else {
		if (vport == phba->pport)
			lpfc_issue_fabric_reglogin(vport);
		else
			lpfc_do_scr_ns_plogi(phba, vport);
	}
5842 5843 5844 5845 5846 5847

	/* Now, we decrement the ndlp reference count held for this
	 * callback function
	 */
	lpfc_nlp_put(ndlp);

5848 5849 5850 5851
	mempool_free(pmb, phba->mbox_mem_pool);
	return;
}

5852
/**
5853
 * lpfc_register_new_vport - Register a new vport with a HBA
5854 5855 5856 5857 5858 5859 5860
 * @phba: pointer to lpfc hba data structure.
 * @vport: pointer to a host virtual N_Port data structure.
 * @ndlp: pointer to a node-list data structure.
 *
 * This routine registers the @vport as a new virtual port with a HBA.
 * It is done through a registering vpi mailbox command.
 **/
Adrian Bunk's avatar
Adrian Bunk committed
5861
static void
5862 5863 5864
lpfc_register_new_vport(struct lpfc_hba *phba, struct lpfc_vport *vport,
			struct lpfc_nodelist *ndlp)
{
5865
	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
5866 5867 5868 5869 5870 5871 5872 5873
	LPFC_MBOXQ_t *mbox;

	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
	if (mbox) {
		lpfc_reg_vpi(phba, vport->vpi, vport->fc_myDID, mbox);
		mbox->vport = vport;
		mbox->context2 = lpfc_nlp_get(ndlp);
		mbox->mbox_cmpl = lpfc_cmpl_reg_new_vport;
5874
		if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
5875
		    == MBX_NOT_FINISHED) {
5876 5877 5878 5879
			/* mailbox command not success, decrement ndlp
			 * reference count for this command
			 */
			lpfc_nlp_put(ndlp);
5880 5881
			mempool_free(mbox, phba->mbox_mem_pool);

5882 5883
			lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
				"0253 Register VPI: Can't send mbox\n");
5884
			goto mbox_err_exit;
5885 5886
		}
	} else {
5887 5888
		lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
				 "0254 Register VPI: no memory\n");
5889
		goto mbox_err_exit;
5890
	}
5891 5892 5893 5894 5895 5896 5897 5898
	return;

mbox_err_exit:
	lpfc_vport_set_state(vport, FC_VPORT_FAILED);
	spin_lock_irq(shost->host_lock);
	vport->fc_flag &= ~FC_VPORT_NEEDS_REG_VPI;
	spin_unlock_irq(shost->host_lock);
	return;
5899 5900
}

5901
/**
5902
 * lpfc_cmpl_els_fdisc - Completion function for fdisc iocb command
5903 5904 5905 5906 5907 5908 5909 5910 5911 5912 5913 5914 5915 5916 5917 5918 5919 5920
 * @phba: pointer to lpfc hba data structure.
 * @cmdiocb: pointer to lpfc command iocb data structure.
 * @rspiocb: pointer to lpfc response iocb data structure.
 *
 * This routine is the completion callback function to a Fabric Discover
 * (FDISC) ELS command. Since all the FDISC ELS commands are issued
 * single threaded, each FDISC completion callback function will reset
 * the discovery timer for all vports such that the timers will not get
 * unnecessary timeout. The function checks the FDISC IOCB status. If error
 * detected, the vport will be set to FC_VPORT_FAILED state. Otherwise,the
 * vport will set to FC_VPORT_ACTIVE state. It then checks whether the DID
 * assigned to the vport has been changed with the completion of the FDISC
 * command. If so, both RPI (Remote Port Index) and VPI (Virtual Port Index)
 * are unregistered from the HBA, and then the lpfc_register_new_vport()
 * routine is invoked to register new vport with the HBA. Otherwise, the
 * lpfc_do_scr_ns_plogi() routine is invoked to issue a PLOGI to the Name
 * Server for State Change Request (SCR).
 **/
5921 5922 5923 5924 5925 5926 5927 5928 5929 5930 5931 5932
static void
lpfc_cmpl_els_fdisc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
		    struct lpfc_iocbq *rspiocb)
{
	struct lpfc_vport *vport = cmdiocb->vport;
	struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
	struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) cmdiocb->context1;
	struct lpfc_nodelist *np;
	struct lpfc_nodelist *next_np;
	IOCB_t *irsp = &rspiocb->iocb;
	struct lpfc_iocbq *piocb;

5933 5934 5935 5936
	lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
			 "0123 FDISC completes. x%x/x%x prevDID: x%x\n",
			 irsp->ulpStatus, irsp->un.ulpWord[4],
			 vport->fc_prevDID);
5937 5938 5939 5940 5941 5942 5943 5944
	/* Since all FDISCs are being single threaded, we
	 * must reset the discovery timer for ALL vports
	 * waiting to send FDISC when one completes.
	 */
	list_for_each_entry(piocb, &phba->fabric_iocb_list, list) {
		lpfc_set_disctmo(piocb->vport);
	}

James Smart's avatar
James Smart committed
5945 5946 5947 5948
	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
		"FDISC cmpl:      status:x%x/x%x prevdid:x%x",
		irsp->ulpStatus, irsp->un.ulpWord[4], vport->fc_prevDID);

5949 5950 5951 5952 5953
	if (irsp->ulpStatus) {
		/* Check for retry */
		if (lpfc_els_retry(phba, cmdiocb, rspiocb))
			goto out;
		/* FDISC failed */
5954
		lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
5955
				 "0126 FDISC failed. (%d/%d)\n",
5956
				 irsp->ulpStatus, irsp->un.ulpWord[4]);
5957 5958
		goto fdisc_failed;
	}
5959 5960 5961 5962 5963
		if (vport->fc_vport->vport_state == FC_VPORT_INITIALIZING)
			lpfc_vport_set_state(vport, FC_VPORT_FAILED);
		lpfc_nlp_put(ndlp);
		/* giving up on FDISC. Cancel discovery timer */
		lpfc_can_disctmo(vport);
5964 5965 5966 5967 5968
	spin_lock_irq(shost->host_lock);
	vport->fc_flag |= FC_FABRIC;
	if (vport->phba->fc_topology == TOPOLOGY_LOOP)
		vport->fc_flag |=  FC_PUBLIC_LOOP;
	spin_unlock_irq(shost->host_lock);
5969

5970 5971 5972 5973 5974 5975 5976 5977 5978 5979 5980 5981 5982 5983
	vport->fc_myDID = irsp->un.ulpWord[4] & Mask_DID;
	lpfc_vport_set_state(vport, FC_VPORT_ACTIVE);
	if ((vport->fc_prevDID != vport->fc_myDID) &&
		!(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) {
		/* If our NportID changed, we need to ensure all
		 * remaining NPORTs get unreg_login'ed so we can
		 * issue unreg_vpi.
		 */
		list_for_each_entry_safe(np, next_np,
			&vport->fc_nodes, nlp_listp) {
			if (!NLP_CHK_NODE_ACT(ndlp) ||
			    (np->nlp_state != NLP_STE_NPR_NODE) ||
			    !(np->nlp_flag & NLP_NPR_ADISC))
				continue;
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			spin_lock_irq(shost->host_lock);
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			np->nlp_flag &= ~NLP_NPR_ADISC;
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			spin_unlock_irq(shost->host_lock);
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			lpfc_unreg_rpi(vport, np);
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		}
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		lpfc_mbx_unreg_vpi(vport);
		spin_lock_irq(shost->host_lock);
		vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
		spin_unlock_irq(shost->host_lock);
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	}

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	if (vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)
		lpfc_register_new_vport(phba, vport, ndlp);
	else
		lpfc_do_scr_ns_plogi(phba, vport);
	goto out;
fdisc_failed:
	lpfc_vport_set_state(vport, FC_VPORT_FAILED);
	/* Cancel discovery timer */
	lpfc_can_disctmo(vport);
	lpfc_nlp_put(ndlp);
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out:
	lpfc_els_free_iocb(phba, cmdiocb);
}

6009
/**
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 * lpfc_issue_els_fdisc - Issue a fdisc iocb command
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 * @vport: pointer to a virtual N_Port data structure.
 * @ndlp: pointer to a node-list data structure.
 * @retry: number of retries to the command IOCB.
 *
 * This routine prepares and issues a Fabric Discover (FDISC) IOCB to
 * a remote node (@ndlp) off a @vport. It uses the lpfc_issue_fabric_iocb()
 * routine to issue the IOCB, which makes sure only one outstanding fabric
 * IOCB will be sent off HBA at any given time.
 *
 * 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 FDISC ELS command.
 *
 * Return code
 *   0 - Successfully issued fdisc iocb command
 *   1 - Failed to issue fdisc iocb command
 **/
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static int
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lpfc_issue_els_fdisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
		     uint8_t retry)
{
	struct lpfc_hba *phba = vport->phba;
	IOCB_t *icmd;
	struct lpfc_iocbq *elsiocb;
	struct serv_parm *sp;
	uint8_t *pcmd;
	uint16_t cmdsize;
	int did = ndlp->nlp_DID;
	int rc;

	cmdsize = (sizeof(uint32_t) + sizeof(struct serv_parm));
	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp, did,
				     ELS_CMD_FDISC);
	if (!elsiocb) {
		lpfc_vport_set_state(vport, FC_VPORT_FAILED);
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		lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
				 "0255 Issue FDISC: no IOCB\n");
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		return 1;
	}

	icmd = &elsiocb->iocb;
	icmd->un.elsreq64.myID = 0;
	icmd->un.elsreq64.fl = 1;

	/* For FDISC, Let FDISC rsp set the NPortID for this VPI */
	icmd->ulpCt_h = 1;
	icmd->ulpCt_l = 0;

	pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
	*((uint32_t *) (pcmd)) = ELS_CMD_FDISC;
	pcmd += sizeof(uint32_t); /* CSP Word 1 */
	memcpy(pcmd, &vport->phba->pport->fc_sparam, sizeof(struct serv_parm));
	sp = (struct serv_parm *) pcmd;
	/* Setup CSPs accordingly for Fabric */
	sp->cmn.e_d_tov = 0;
	sp->cmn.w2.r_a_tov = 0;
	sp->cls1.classValid = 0;
	sp->cls2.seqDelivery = 1;
	sp->cls3.seqDelivery = 1;

	pcmd += sizeof(uint32_t); /* CSP Word 2 */
	pcmd += sizeof(uint32_t); /* CSP Word 3 */
	pcmd += sizeof(uint32_t); /* CSP Word 4 */
	pcmd += sizeof(uint32_t); /* Port Name */
	memcpy(pcmd, &vport->fc_portname, 8);
	pcmd += sizeof(uint32_t); /* Node Name */
	pcmd += sizeof(uint32_t); /* Node Name */
	memcpy(pcmd, &vport->fc_nodename, 8);

	lpfc_set_disctmo(vport);

	phba->fc_stat.elsXmitFDISC++;
	elsiocb->iocb_cmpl = lpfc_cmpl_els_fdisc;

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	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
		"Issue FDISC:     did:x%x",
		did, 0, 0);

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	rc = lpfc_issue_fabric_iocb(phba, elsiocb);
	if (rc == IOCB_ERROR) {
		lpfc_els_free_iocb(phba, elsiocb);
		lpfc_vport_set_state(vport, FC_VPORT_FAILED);
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		lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
				 "0256 Issue FDISC: Cannot send IOCB\n");
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		return 1;
	}
	lpfc_vport_set_state(vport, FC_VPORT_INITIALIZING);
	vport->port_state = LPFC_FDISC;
	return 0;
}

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/**
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 * lpfc_cmpl_els_npiv_logo - Completion function with vport logo
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 * @phba: pointer to lpfc hba data structure.
 * @cmdiocb: pointer to lpfc command iocb data structure.
 * @rspiocb: pointer to lpfc response iocb data structure.
 *
 * This routine is the completion callback function to the issuing of a LOGO
 * ELS command off a vport. It frees the command IOCB and then decrement the
 * reference count held on ndlp for this completion function, indicating that
 * the reference to the ndlp is no long needed. Note that the
 * lpfc_els_free_iocb() routine decrements the ndlp reference held for this
 * callback function and an additional explicit ndlp reference decrementation
 * will trigger the actual release of the ndlp.
 **/
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static void
lpfc_cmpl_els_npiv_logo(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
			struct lpfc_iocbq *rspiocb)
{
	struct lpfc_vport *vport = cmdiocb->vport;
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	IOCB_t *irsp;
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	struct lpfc_nodelist *ndlp;
	ndlp = (struct lpfc_nodelist *)cmdiocb->context1;
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	irsp = &rspiocb->iocb;
	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
		"LOGO npiv cmpl:  status:x%x/x%x did:x%x",
		irsp->ulpStatus, irsp->un.ulpWord[4], irsp->un.rcvels.remoteID);
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	lpfc_els_free_iocb(phba, cmdiocb);
	vport->unreg_vpi_cmpl = VPORT_ERROR;
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	/* Trigger the release of the ndlp after logo */
	lpfc_nlp_put(ndlp);
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}

6138
/**
6139
 * lpfc_issue_els_npiv_logo - Issue a logo off a vport
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 * @vport: pointer to a virtual N_Port data structure.
 * @ndlp: pointer to a node-list data structure.
 *
 * This routine issues a LOGO ELS command to an @ndlp off a @vport.
 *
 * 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 LOGO ELS command.
 *
 * Return codes
 *   0 - Successfully issued logo off the @vport
 *   1 - Failed to issue logo off the @vport
 **/
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int
lpfc_issue_els_npiv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
{
	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
	struct lpfc_hba  *phba = vport->phba;
	struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
	IOCB_t *icmd;
	struct lpfc_iocbq *elsiocb;
	uint8_t *pcmd;
	uint16_t cmdsize;

	cmdsize = 2 * sizeof(uint32_t) + sizeof(struct lpfc_name);
	elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, 0, ndlp, ndlp->nlp_DID,
				     ELS_CMD_LOGO);
	if (!elsiocb)
		return 1;

	icmd = &elsiocb->iocb;
	pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
	*((uint32_t *) (pcmd)) = ELS_CMD_LOGO;
	pcmd += sizeof(uint32_t);

	/* Fill in LOGO payload */
	*((uint32_t *) (pcmd)) = be32_to_cpu(vport->fc_myDID);
	pcmd += sizeof(uint32_t);
	memcpy(pcmd, &vport->fc_portname, sizeof(struct lpfc_name));

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	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
		"Issue LOGO npiv  did:x%x flg:x%x",
		ndlp->nlp_DID, ndlp->nlp_flag, 0);

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	elsiocb->iocb_cmpl = lpfc_cmpl_els_npiv_logo;
	spin_lock_irq(shost->host_lock);
	ndlp->nlp_flag |= NLP_LOGO_SND;
	spin_unlock_irq(shost->host_lock);
	if (lpfc_sli_issue_iocb(phba, pring, elsiocb, 0) == IOCB_ERROR) {
		spin_lock_irq(shost->host_lock);
		ndlp->nlp_flag &= ~NLP_LOGO_SND;
		spin_unlock_irq(shost->host_lock);
		lpfc_els_free_iocb(phba, elsiocb);
		return 1;
	}
	return 0;
}

6199
/**
6200
 * lpfc_fabric_block_timeout - Handler function to the fabric block timer
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 * @ptr: holder for the timer function associated data.
 *
 * This routine is invoked by the fabric iocb block timer after
 * timeout. It posts the fabric iocb block timeout event by setting the
 * WORKER_FABRIC_BLOCK_TMO bit to work port event bitmap and then invokes
 * lpfc_worker_wake_up() routine to wake up the worker thread. It is for
 * the worker thread to invoke the lpfc_unblock_fabric_iocbs() on the
 * posted event WORKER_FABRIC_BLOCK_TMO.
 **/
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void
lpfc_fabric_block_timeout(unsigned long ptr)
{
	struct lpfc_hba  *phba = (struct lpfc_hba *) ptr;
	unsigned long iflags;
	uint32_t tmo_posted;
6216

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	spin_lock_irqsave(&phba->pport->work_port_lock, iflags);
	tmo_posted = phba->pport->work_port_events & WORKER_FABRIC_BLOCK_TMO;
	if (!tmo_posted)
		phba->pport->work_port_events |= WORKER_FABRIC_BLOCK_TMO;
	spin_unlock_irqrestore(&phba->pport->work_port_lock, iflags);

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	if (!tmo_posted)
		lpfc_worker_wake_up(phba);
	return;
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}

6228
/**
6229
 * lpfc_resume_fabric_iocbs - Issue a fabric iocb from driver internal list
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 * @phba: pointer to lpfc hba data structure.
 *
 * This routine issues one fabric iocb from the driver internal list to
 * the HBA. It first checks whether it's ready to issue one fabric iocb to
 * the HBA (whether there is no outstanding fabric iocb). If so, it shall
 * remove one pending fabric iocb from the driver internal list and invokes
 * lpfc_sli_issue_iocb() routine to send the fabric iocb to the HBA.
 **/
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static void
lpfc_resume_fabric_iocbs(struct lpfc_hba *phba)
{
	struct lpfc_iocbq *iocb;
	unsigned long iflags;
	int ret;
	struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
	IOCB_t *cmd;

repeat:
	iocb = NULL;
	spin_lock_irqsave(&phba->hbalock, iflags);
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	/* Post any pending iocb to the SLI layer */
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	if (atomic_read(&phba->fabric_iocb_count) == 0) {
		list_remove_head(&phba->fabric_iocb_list, iocb, typeof(*iocb),
				 list);
		if (iocb)
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			/* Increment fabric iocb count to hold the position */
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			atomic_inc(&phba->fabric_iocb_count);
	}
	spin_unlock_irqrestore(&phba->hbalock, iflags);
	if (iocb) {
		iocb->fabric_iocb_cmpl = iocb->iocb_cmpl;
		iocb->iocb_cmpl = lpfc_cmpl_fabric_iocb;
		iocb->iocb_flag |= LPFC_IO_FABRIC;

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		lpfc_debugfs_disc_trc(iocb->vport, LPFC_DISC_TRC_ELS_CMD,
			"Fabric sched1:   ste:x%x",
			iocb->vport->port_state, 0, 0);

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		ret = lpfc_sli_issue_iocb(phba, pring, iocb, 0);

		if (ret == IOCB_ERROR) {
			iocb->iocb_cmpl = iocb->fabric_iocb_cmpl;
			iocb->fabric_iocb_cmpl = NULL;
			iocb->iocb_flag &= ~LPFC_IO_FABRIC;
			cmd = &iocb->iocb;
			cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
			cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
			iocb->iocb_cmpl(phba, iocb, iocb);

			atomic_dec(&phba->fabric_iocb_count);
			goto repeat;
		}
	}

	return;
}

6287
/**
6288
 * lpfc_unblock_fabric_iocbs - Unblock issuing fabric iocb command
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 * @phba: pointer to lpfc hba data structure.
 *
 * This routine unblocks the  issuing fabric iocb command. The function
 * will clear the fabric iocb block bit and then invoke the routine
 * lpfc_resume_fabric_iocbs() to issue one of the pending fabric iocb
 * from the driver internal fabric iocb list.
 **/
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void
lpfc_unblock_fabric_iocbs(struct lpfc_hba *phba)
{
	clear_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);

	lpfc_resume_fabric_iocbs(phba);
	return;
}

6305
/**
6306
 * lpfc_block_fabric_iocbs - Block issuing fabric iocb command
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 * @phba: pointer to lpfc hba data structure.
 *
 * This routine blocks the issuing fabric iocb for a specified amount of
 * time (currently 100 ms). This is done by set the fabric iocb block bit
 * and set up a timeout timer for 100ms. When the block bit is set, no more
 * fabric iocb will be issued out of the HBA.
 **/
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static void
lpfc_block_fabric_iocbs(struct lpfc_hba *phba)
{
	int blocked;

	blocked = test_and_set_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
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	/* Start a timer to unblock fabric iocbs after 100ms */
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	if (!blocked)
		mod_timer(&phba->fabric_block_timer, jiffies + HZ/10 );

	return;
}

6327
/**
6328
 * lpfc_cmpl_fabric_iocb - Completion callback function for fabric iocb
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 * @phba: pointer to lpfc hba data structure.
 * @cmdiocb: pointer to lpfc command iocb data structure.
 * @rspiocb: pointer to lpfc response iocb data structure.
 *
 * This routine is the callback function that is put to the fabric iocb's
 * callback function pointer (iocb->iocb_cmpl). The original iocb's callback
 * function pointer has been stored in iocb->fabric_iocb_cmpl. This callback
 * function first restores and invokes the original iocb's callback function
 * and then invokes the lpfc_resume_fabric_iocbs() routine to issue the next
 * fabric bound iocb from the driver internal fabric iocb list onto the wire.
 **/
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static void
lpfc_cmpl_fabric_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
	struct lpfc_iocbq *rspiocb)
{
	struct ls_rjt stat;

	if ((cmdiocb->iocb_flag & LPFC_IO_FABRIC) != LPFC_IO_FABRIC)
		BUG();

	switch (rspiocb->iocb.ulpStatus) {
		case IOSTAT_NPORT_RJT:
		case IOSTAT_FABRIC_RJT:
			if (rspiocb->iocb.un.ulpWord[4] & RJT_UNAVAIL_TEMP) {
				lpfc_block_fabric_iocbs(phba);
6354
			}
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			break;

		case IOSTAT_NPORT_BSY:
		case IOSTAT_FABRIC_BSY:
			lpfc_block_fabric_iocbs(phba);
			break;

		case IOSTAT_LS_RJT:
			stat.un.lsRjtError =
				be32_to_cpu(rspiocb->iocb.un.ulpWord[4]);
			if ((stat.un.b.lsRjtRsnCode == LSRJT_UNABLE_TPC) ||
				(stat.un.b.lsRjtRsnCode == LSRJT_LOGICAL_BSY))
				lpfc_block_fabric_iocbs(phba);
			break;
	}

	if (atomic_read(&phba->fabric_iocb_count) == 0)
		BUG();

	cmdiocb->iocb_cmpl = cmdiocb->fabric_iocb_cmpl;
	cmdiocb->fabric_iocb_cmpl = NULL;
	cmdiocb->iocb_flag &= ~LPFC_IO_FABRIC;
	cmdiocb->iocb_cmpl(phba, cmdiocb, rspiocb);

	atomic_dec(&phba->fabric_iocb_count);
	if (!test_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags)) {
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		/* Post any pending iocbs to HBA */
		lpfc_resume_fabric_iocbs(phba);
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	}
}

6386
/**
6387
 * lpfc_issue_fabric_iocb - Issue a fabric iocb command
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 * @phba: pointer to lpfc hba data structure.
 * @iocb: pointer to lpfc command iocb data structure.
 *
 * This routine is used as the top-level API for issuing a fabric iocb command
 * such as FLOGI and FDISC. To accommodate certain switch fabric, this driver
 * function makes sure that only one fabric bound iocb will be outstanding at
 * any given time. As such, this function will first check to see whether there
 * is already an outstanding fabric iocb on the wire. If so, it will put the
 * newly issued iocb onto the driver internal fabric iocb list, waiting to be
 * issued later. Otherwise, it will issue the iocb on the wire and update the
 * fabric iocb count it indicate that there is one fabric iocb on the wire.
 *
 * Note, this implementation has a potential sending out fabric IOCBs out of
 * order. The problem is caused by the construction of the "ready" boolen does
 * not include the condition that the internal fabric IOCB list is empty. As
 * such, it is possible a fabric IOCB issued by this routine might be "jump"
 * ahead of the fabric IOCBs in the internal list.
 *
 * Return code
 *   IOCB_SUCCESS - either fabric iocb put on the list or issued successfully
 *   IOCB_ERROR - failed to issue fabric iocb
 **/
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static int
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lpfc_issue_fabric_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *iocb)
{
	unsigned long iflags;
	struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
	int ready;
	int ret;

	if (atomic_read(&phba->fabric_iocb_count) > 1)
		BUG();

	spin_lock_irqsave(&phba->hbalock, iflags);
	ready = atomic_read(&phba->fabric_iocb_count) == 0 &&
		!test_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);

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	if (ready)
		/* Increment fabric iocb count to hold the position */
		atomic_inc(&phba->fabric_iocb_count);
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	spin_unlock_irqrestore(&phba->hbalock, iflags);
	if (ready) {
		iocb->fabric_iocb_cmpl = iocb->iocb_cmpl;
		iocb->iocb_cmpl = lpfc_cmpl_fabric_iocb;
		iocb->iocb_flag |= LPFC_IO_FABRIC;

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		lpfc_debugfs_disc_trc(iocb->vport, LPFC_DISC_TRC_ELS_CMD,
			"Fabric sched2:   ste:x%x",
			iocb->vport->port_state, 0, 0);

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		ret = lpfc_sli_issue_iocb(phba, pring, iocb, 0);

		if (ret == IOCB_ERROR) {
			iocb->iocb_cmpl = iocb->fabric_iocb_cmpl;
			iocb->fabric_iocb_cmpl = NULL;
			iocb->iocb_flag &= ~LPFC_IO_FABRIC;
			atomic_dec(&phba->fabric_iocb_count);
		}
	} else {
		spin_lock_irqsave(&phba->hbalock, iflags);
		list_add_tail(&iocb->list, &phba->fabric_iocb_list);
		spin_unlock_irqrestore(&phba->hbalock, iflags);
		ret = IOCB_SUCCESS;
	}
	return ret;
}

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/**
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 * lpfc_fabric_abort_vport - Abort a vport's iocbs from driver fabric iocb list
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 * @vport: pointer to a virtual N_Port data structure.
 *
 * This routine aborts all the IOCBs associated with a @vport from the
 * driver internal fabric IOCB list. The list contains fabric IOCBs to be
 * issued to the ELS IOCB ring. This abort function walks the fabric IOCB
 * list, removes each IOCB associated with the @vport off the list, set the
 * status feild to IOSTAT_LOCAL_REJECT, and invokes the callback function
 * associated with the IOCB.
 **/
Adrian Bunk's avatar
Adrian Bunk committed
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static void lpfc_fabric_abort_vport(struct lpfc_vport *vport)
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{
	LIST_HEAD(completions);
	struct lpfc_hba  *phba = vport->phba;
	struct lpfc_iocbq *tmp_iocb, *piocb;
	IOCB_t *cmd;

	spin_lock_irq(&phba->hbalock);
	list_for_each_entry_safe(piocb, tmp_iocb, &phba->fabric_iocb_list,
				 list) {

		if (piocb->vport != vport)
			continue;

		list_move_tail(&piocb->list, &completions);
	}
	spin_unlock_irq(&phba->hbalock);

	while (!list_empty(&completions)) {
		piocb = list_get_first(&completions, struct lpfc_iocbq, list);
		list_del_init(&piocb->list);

		cmd = &piocb->iocb;
		cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
		cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
		(piocb->iocb_cmpl) (phba, piocb, piocb);
	}
}

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/**
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 * lpfc_fabric_abort_nport - Abort a ndlp's iocbs from driver fabric iocb list
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 * @ndlp: pointer to a node-list data structure.
 *
 * This routine aborts all the IOCBs associated with an @ndlp from the
 * driver internal fabric IOCB list. The list contains fabric IOCBs to be
 * issued to the ELS IOCB ring. This abort function walks the fabric IOCB
 * list, removes each IOCB associated with the @ndlp off the list, set the
 * status feild to IOSTAT_LOCAL_REJECT, and invokes the callback function
 * associated with the IOCB.
 **/
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void lpfc_fabric_abort_nport(struct lpfc_nodelist *ndlp)
{
	LIST_HEAD(completions);
	struct lpfc_hba  *phba = ndlp->vport->phba;
	struct lpfc_iocbq *tmp_iocb, *piocb;
	struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
	IOCB_t *cmd;

	spin_lock_irq(&phba->hbalock);
	list_for_each_entry_safe(piocb, tmp_iocb, &phba->fabric_iocb_list,
				 list) {
		if ((lpfc_check_sli_ndlp(phba, pring, piocb, ndlp))) {

			list_move_tail(&piocb->list, &completions);
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		}
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	}
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	spin_unlock_irq(&phba->hbalock);

	while (!list_empty(&completions)) {
		piocb = list_get_first(&completions, struct lpfc_iocbq, list);
		list_del_init(&piocb->list);

		cmd = &piocb->iocb;
		cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
		cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
		(piocb->iocb_cmpl) (phba, piocb, piocb);
	}
}

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/**
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 * lpfc_fabric_abort_hba - Abort all iocbs on driver fabric iocb list
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 * @phba: pointer to lpfc hba data structure.
 *
 * This routine aborts all the IOCBs currently on the driver internal
 * fabric IOCB list. The list contains fabric IOCBs to be issued to the ELS
 * IOCB ring. This function takes the entire IOCB list off the fabric IOCB
 * list, removes IOCBs off the list, set the status feild to
 * IOSTAT_LOCAL_REJECT, and invokes the callback function associated with
 * the IOCB.
 **/
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void lpfc_fabric_abort_hba(struct lpfc_hba *phba)
{
	LIST_HEAD(completions);
	struct lpfc_iocbq *piocb;
	IOCB_t *cmd;

	spin_lock_irq(&phba->hbalock);
	list_splice_init(&phba->fabric_iocb_list, &completions);
	spin_unlock_irq(&phba->hbalock);

	while (!list_empty(&completions)) {
		piocb = list_get_first(&completions, struct lpfc_iocbq, list);
		list_del_init(&piocb->list);

		cmd = &piocb->iocb;
		cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
		cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
		(piocb->iocb_cmpl) (phba, piocb, piocb);
	}
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}