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lpfc_els.c
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lpfc_els.c
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/*******************************************************************
* This file is part of the Emulex Linux Device Driver for *
* Fibre Channel Host Bus Adapters. *
* Copyright (C) 2017-2021 Broadcom. All Rights Reserved. The term *
* “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. *
* Copyright (C) 2004-2016 Emulex. All rights reserved. *
* EMULEX and SLI are trademarks of Emulex. *
* www.broadcom.com *
* Portions Copyright (C) 2004-2005 Christoph Hellwig *
* *
* This program is free software; you can redistribute it and/or *
* 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. *
*******************************************************************/
/* See Fibre Channel protocol T11 FC-LS for details */
#include <linux/blkdev.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport_fc.h>
#include <uapi/scsi/fc/fc_fs.h>
#include <uapi/scsi/fc/fc_els.h>
#include "lpfc_hw4.h"
#include "lpfc_hw.h"
#include "lpfc_sli.h"
#include "lpfc_sli4.h"
#include "lpfc_nl.h"
#include "lpfc_disc.h"
#include "lpfc_scsi.h"
#include "lpfc.h"
#include "lpfc_logmsg.h"
#include "lpfc_crtn.h"
#include "lpfc_vport.h"
#include "lpfc_debugfs.h"
static int lpfc_els_retry(struct lpfc_hba *, struct lpfc_iocbq *,
struct lpfc_iocbq *);
static void lpfc_cmpl_fabric_iocb(struct lpfc_hba *, struct lpfc_iocbq *,
struct lpfc_iocbq *);
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_cmpl_els_edc(struct lpfc_hba *phba,
struct lpfc_iocbq *cmdiocb,
struct lpfc_iocbq *rspiocb);
static void lpfc_cmpl_els_uvem(struct lpfc_hba *, struct lpfc_iocbq *,
struct lpfc_iocbq *);
static int lpfc_max_els_tries = 3;
static void lpfc_init_cs_ctl_bitmap(struct lpfc_vport *vport);
static void lpfc_vmid_set_cs_ctl_range(struct lpfc_vport *vport, u32 min, u32 max);
static void lpfc_vmid_put_cs_ctl(struct lpfc_vport *vport, u32 ctcl_vmid);
/**
* lpfc_els_chk_latt - Check host link attention event for a vport
* @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
**/
int
lpfc_els_chk_latt(struct lpfc_vport *vport)
{
struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
struct lpfc_hba *phba = vport->phba;
uint32_t ha_copy;
if (vport->port_state >= LPFC_VPORT_READY ||
phba->link_state == LPFC_LINK_DOWN ||
phba->sli_rev > LPFC_SLI_REV3)
return 0;
/* Read the HBA Host Attention Register */
if (lpfc_readl(phba->HAregaddr, &ha_copy))
return 1;
if (!(ha_copy & HA_LATT))
return 0;
/* Pending Link Event during Discovery */
lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
"0237 Pending Link Event during "
"Discovery: State x%x\n",
phba->pport->port_state);
/* CLEAR_LA should re-enable link attention events and
* we should then immediately take a LATT event. The
* LATT processing should call lpfc_linkdown() which
* will cleanup any left over in-progress discovery
* events.
*/
spin_lock_irq(shost->host_lock);
vport->fc_flag |= FC_ABORT_DISCOVERY;
spin_unlock_irq(shost->host_lock);
if (phba->link_state != LPFC_CLEAR_LA)
lpfc_issue_clear_la(phba, vport);
return 1;
}
/**
* lpfc_prep_els_iocb - Allocate and prepare a lpfc iocb data structure
* @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
**/
struct lpfc_iocbq *
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)
{
struct lpfc_hba *phba = vport->phba;
struct lpfc_iocbq *elsiocb;
struct lpfc_dmabuf *pcmd, *prsp, *pbuflist;
struct ulp_bde64 *bpl;
IOCB_t *icmd;
if (!lpfc_is_link_up(phba))
return NULL;
/* Allocate buffer for command iocb */
elsiocb = lpfc_sli_get_iocbq(phba);
if (elsiocb == NULL)
return NULL;
/*
* If this command is for fabric controller and HBA running
* in FIP mode send FLOGI, FDISC and LOGO as FIP frames.
*/
if ((did == Fabric_DID) &&
(phba->hba_flag & HBA_FIP_SUPPORT) &&
((elscmd == ELS_CMD_FLOGI) ||
(elscmd == ELS_CMD_FDISC) ||
(elscmd == ELS_CMD_LOGO)))
switch (elscmd) {
case ELS_CMD_FLOGI:
elsiocb->iocb_flag |=
((LPFC_ELS_ID_FLOGI << LPFC_FIP_ELS_ID_SHIFT)
& LPFC_FIP_ELS_ID_MASK);
break;
case ELS_CMD_FDISC:
elsiocb->iocb_flag |=
((LPFC_ELS_ID_FDISC << LPFC_FIP_ELS_ID_SHIFT)
& LPFC_FIP_ELS_ID_MASK);
break;
case ELS_CMD_LOGO:
elsiocb->iocb_flag |=
((LPFC_ELS_ID_LOGO << LPFC_FIP_ELS_ID_SHIFT)
& LPFC_FIP_ELS_ID_MASK);
break;
}
else
elsiocb->iocb_flag &= ~LPFC_FIP_ELS_ID_MASK;
icmd = &elsiocb->iocb;
/* fill in BDEs for command */
/* Allocate buffer for command payload */
pcmd = kmalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
if (pcmd)
pcmd->virt = lpfc_mbuf_alloc(phba, MEM_PRI, &pcmd->phys);
if (!pcmd || !pcmd->virt)
goto els_iocb_free_pcmb_exit;
INIT_LIST_HEAD(&pcmd->list);
/* Allocate buffer for response payload */
if (expectRsp) {
prsp = kmalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
if (prsp)
prsp->virt = lpfc_mbuf_alloc(phba, MEM_PRI,
&prsp->phys);
if (!prsp || !prsp->virt)
goto els_iocb_free_prsp_exit;
INIT_LIST_HEAD(&prsp->list);
} else
prsp = NULL;
/* Allocate buffer for Buffer ptr list */
pbuflist = kmalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
if (pbuflist)
pbuflist->virt = lpfc_mbuf_alloc(phba, MEM_PRI,
&pbuflist->phys);
if (!pbuflist || !pbuflist->virt)
goto els_iocb_free_pbuf_exit;
INIT_LIST_HEAD(&pbuflist->list);
if (expectRsp) {
icmd->un.elsreq64.bdl.addrHigh = putPaddrHigh(pbuflist->phys);
icmd->un.elsreq64.bdl.addrLow = putPaddrLow(pbuflist->phys);
icmd->un.elsreq64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
icmd->un.elsreq64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
icmd->un.elsreq64.remoteID = did; /* DID */
icmd->ulpCommand = CMD_ELS_REQUEST64_CR;
if (elscmd == ELS_CMD_FLOGI)
icmd->ulpTimeout = FF_DEF_RATOV * 2;
else if (elscmd == ELS_CMD_LOGO)
icmd->ulpTimeout = phba->fc_ratov;
else
icmd->ulpTimeout = phba->fc_ratov * 2;
} else {
icmd->un.xseq64.bdl.addrHigh = putPaddrHigh(pbuflist->phys);
icmd->un.xseq64.bdl.addrLow = putPaddrLow(pbuflist->phys);
icmd->un.xseq64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
icmd->un.xseq64.bdl.bdeSize = sizeof(struct ulp_bde64);
icmd->un.xseq64.xmit_els_remoteID = did; /* DID */
icmd->ulpCommand = CMD_XMIT_ELS_RSP64_CX;
}
icmd->ulpBdeCount = 1;
icmd->ulpLe = 1;
icmd->ulpClass = CLASS3;
/*
* If we have NPIV enabled, we want to send ELS traffic by VPI.
* For SLI4, since the driver controls VPIs we also want to include
* all ELS pt2pt protocol traffic as well.
*/
if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) ||
((phba->sli_rev == LPFC_SLI_REV4) &&
(vport->fc_flag & FC_PT2PT))) {
if (expectRsp) {
icmd->un.elsreq64.myID = vport->fc_myDID;
/* For ELS_REQUEST64_CR, use the VPI by default */
icmd->ulpContext = phba->vpi_ids[vport->vpi];
}
icmd->ulpCt_h = 0;
/* 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 */
}
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;
bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
bpl->tus.w = le32_to_cpu(bpl->tus.w);
}
elsiocb->context2 = pcmd;
elsiocb->context3 = pbuflist;
elsiocb->retry = retry;
elsiocb->vport = vport;
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> */
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 "
"rpi x%x fc_flag:x%x nlp_flag:x%x vport:x%p\n",
elscmd, did, elsiocb->iotag,
vport->port_state, ndlp->nlp_rpi,
vport->fc_flag, ndlp->nlp_flag, vport);
} else {
/* Xmit ELS response <elsCmd> to remote NPORT <did> */
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 "
"port_state x%x rpi x%x fc_flag x%x\n",
elscmd, ndlp->nlp_DID, elsiocb->iotag,
cmdSize, vport->port_state,
ndlp->nlp_rpi, vport->fc_flag);
}
return elsiocb;
els_iocb_free_pbuf_exit:
if (expectRsp)
lpfc_mbuf_free(phba, prsp->virt, prsp->phys);
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;
}
/**
* lpfc_issue_fabric_reglogin - Issue fabric registration login for a vport
* @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
**/
int
lpfc_issue_fabric_reglogin(struct lpfc_vport *vport)
{
struct lpfc_hba *phba = vport->phba;
LPFC_MBOXQ_t *mbox;
struct lpfc_dmabuf *mp;
struct lpfc_nodelist *ndlp;
struct serv_parm *sp;
int rc;
int err = 0;
sp = &phba->fc_fabparam;
ndlp = lpfc_findnode_did(vport, Fabric_DID);
if (!ndlp) {
err = 1;
goto fail;
}
mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
if (!mbox) {
err = 2;
goto fail;
}
vport->port_state = LPFC_FABRIC_CFG_LINK;
lpfc_config_link(phba, mbox);
mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
mbox->vport = vport;
rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
if (rc == MBX_NOT_FINISHED) {
err = 3;
goto fail_free_mbox;
}
mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
if (!mbox) {
err = 4;
goto fail;
}
rc = lpfc_reg_rpi(phba, vport->vpi, Fabric_DID, (uint8_t *)sp, mbox,
ndlp->nlp_rpi);
if (rc) {
err = 5;
goto fail_free_mbox;
}
mbox->mbox_cmpl = lpfc_mbx_cmpl_fabric_reg_login;
mbox->vport = vport;
/* increment the reference count on ndlp to hold reference
* for the callback routine.
*/
mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
if (!mbox->ctx_ndlp) {
err = 6;
goto fail_no_ndlp;
}
rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
if (rc == MBX_NOT_FINISHED) {
err = 7;
goto fail_issue_reg_login;
}
return 0;
fail_issue_reg_login:
/* decrement the reference count on ndlp just incremented
* for the failed mbox command.
*/
lpfc_nlp_put(ndlp);
fail_no_ndlp:
mp = (struct lpfc_dmabuf *)mbox->ctx_buf;
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);
lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
"0249 Cannot issue Register Fabric login: Err %d\n",
err);
return -ENXIO;
}
/**
* lpfc_issue_reg_vfi - Register VFI for this vport's fabric login
* @vport: pointer to a host virtual N_Port data structure.
*
* This routine issues a REG_VFI mailbox for the vfi, vpi, fcfi triplet for
* the @vport. This mailbox command is necessary for SLI4 port only.
*
* Return code
* 0 - successfully issued REG_VFI for @vport
* A failure code otherwise.
**/
int
lpfc_issue_reg_vfi(struct lpfc_vport *vport)
{
struct lpfc_hba *phba = vport->phba;
LPFC_MBOXQ_t *mboxq = NULL;
struct lpfc_nodelist *ndlp;
struct lpfc_dmabuf *dmabuf = NULL;
int rc = 0;
/* move forward in case of SLI4 FC port loopback test and pt2pt mode */
if ((phba->sli_rev == LPFC_SLI_REV4) &&
!(phba->link_flag & LS_LOOPBACK_MODE) &&
!(vport->fc_flag & FC_PT2PT)) {
ndlp = lpfc_findnode_did(vport, Fabric_DID);
if (!ndlp) {
rc = -ENODEV;
goto fail;
}
}
mboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
if (!mboxq) {
rc = -ENOMEM;
goto fail;
}
/* Supply CSP's only if we are fabric connect or pt-to-pt connect */
if ((vport->fc_flag & FC_FABRIC) || (vport->fc_flag & FC_PT2PT)) {
dmabuf = kzalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
if (!dmabuf) {
rc = -ENOMEM;
goto fail;
}
dmabuf->virt = lpfc_mbuf_alloc(phba, MEM_PRI, &dmabuf->phys);
if (!dmabuf->virt) {
rc = -ENOMEM;
goto fail;
}
memcpy(dmabuf->virt, &phba->fc_fabparam,
sizeof(struct serv_parm));
}
vport->port_state = LPFC_FABRIC_CFG_LINK;
if (dmabuf)
lpfc_reg_vfi(mboxq, vport, dmabuf->phys);
else
lpfc_reg_vfi(mboxq, vport, 0);
mboxq->mbox_cmpl = lpfc_mbx_cmpl_reg_vfi;
mboxq->vport = vport;
mboxq->ctx_buf = dmabuf;
rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_NOWAIT);
if (rc == MBX_NOT_FINISHED) {
rc = -ENXIO;
goto fail;
}
return 0;
fail:
if (mboxq)
mempool_free(mboxq, phba->mbox_mem_pool);
if (dmabuf) {
if (dmabuf->virt)
lpfc_mbuf_free(phba, dmabuf->virt, dmabuf->phys);
kfree(dmabuf);
}
lpfc_vport_set_state(vport, FC_VPORT_FAILED);
lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
"0289 Issue Register VFI failed: Err %d\n", rc);
return rc;
}
/**
* lpfc_issue_unreg_vfi - Unregister VFI for this vport's fabric login
* @vport: pointer to a host virtual N_Port data structure.
*
* This routine issues a UNREG_VFI mailbox with the vfi, vpi, fcfi triplet for
* the @vport. This mailbox command is necessary for SLI4 port only.
*
* Return code
* 0 - successfully issued REG_VFI for @vport
* A failure code otherwise.
**/
int
lpfc_issue_unreg_vfi(struct lpfc_vport *vport)
{
struct lpfc_hba *phba = vport->phba;
struct Scsi_Host *shost;
LPFC_MBOXQ_t *mboxq;
int rc;
mboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
if (!mboxq) {
lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
"2556 UNREG_VFI mbox allocation failed"
"HBA state x%x\n", phba->pport->port_state);
return -ENOMEM;
}
lpfc_unreg_vfi(mboxq, vport);
mboxq->vport = vport;
mboxq->mbox_cmpl = lpfc_unregister_vfi_cmpl;
rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_NOWAIT);
if (rc == MBX_NOT_FINISHED) {
lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
"2557 UNREG_VFI issue mbox failed rc x%x "
"HBA state x%x\n",
rc, phba->pport->port_state);
mempool_free(mboxq, phba->mbox_mem_pool);
return -EIO;
}
shost = lpfc_shost_from_vport(vport);
spin_lock_irq(shost->host_lock);
vport->fc_flag &= ~FC_VFI_REGISTERED;
spin_unlock_irq(shost->host_lock);
return 0;
}
/**
* lpfc_check_clean_addr_bit - Check whether assigned FCID is clean.
* @vport: pointer to a host virtual N_Port data structure.
* @sp: pointer to service parameter data structure.
*
* This routine is called from FLOGI/FDISC completion handler functions.
* lpfc_check_clean_addr_bit return 1 when FCID/Fabric portname/ Fabric
* node nodename is changed in the completion service parameter else return
* 0. This function also set flag in the vport data structure to delay
* NP_Port discovery after the FLOGI/FDISC completion if Clean address bit
* in FLOGI/FDISC response is cleared and FCID/Fabric portname/ Fabric
* node nodename is changed in the completion service parameter.
*
* Return code
* 0 - FCID and Fabric Nodename and Fabric portname is not changed.
* 1 - FCID or Fabric Nodename or Fabric portname is changed.
*
**/
static uint8_t
lpfc_check_clean_addr_bit(struct lpfc_vport *vport,
struct serv_parm *sp)
{
struct lpfc_hba *phba = vport->phba;
uint8_t fabric_param_changed = 0;
struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
if ((vport->fc_prevDID != vport->fc_myDID) ||
memcmp(&vport->fabric_portname, &sp->portName,
sizeof(struct lpfc_name)) ||
memcmp(&vport->fabric_nodename, &sp->nodeName,
sizeof(struct lpfc_name)) ||
(vport->vport_flag & FAWWPN_PARAM_CHG)) {
fabric_param_changed = 1;
vport->vport_flag &= ~FAWWPN_PARAM_CHG;
}
/*
* Word 1 Bit 31 in common service parameter is overloaded.
* Word 1 Bit 31 in FLOGI request is multiple NPort request
* Word 1 Bit 31 in FLOGI response is clean address bit
*
* If fabric parameter is changed and clean address bit is
* cleared delay nport discovery if
* - vport->fc_prevDID != 0 (not initial discovery) OR
* - lpfc_delay_discovery module parameter is set.
*/
if (fabric_param_changed && !sp->cmn.clean_address_bit &&
(vport->fc_prevDID || phba->cfg_delay_discovery)) {
spin_lock_irq(shost->host_lock);
vport->fc_flag |= FC_DISC_DELAYED;
spin_unlock_irq(shost->host_lock);
}
return fabric_param_changed;
}
/**
* lpfc_cmpl_els_flogi_fabric - Completion function for flogi to a fabric port
* @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)
**/
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;
uint8_t fabric_param_changed;
spin_lock_irq(shost->host_lock);
vport->fc_flag |= FC_FABRIC;
spin_unlock_irq(shost->host_lock);
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_edtovResol = sp->cmn.edtovResolution;
phba->fc_ratov = (be32_to_cpu(sp->cmn.w2.r_a_tov) + 999) / 1000;
if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
spin_lock_irq(shost->host_lock);
vport->fc_flag |= FC_PUBLIC_LOOP;
spin_unlock_irq(shost->host_lock);
}
vport->fc_myDID = irsp->un.ulpWord[4] & Mask_DID;
memcpy(&ndlp->nlp_portname, &sp->portName, sizeof(struct lpfc_name));
memcpy(&ndlp->nlp_nodename, &sp->nodeName, sizeof(struct lpfc_name));
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;
fabric_param_changed = lpfc_check_clean_addr_bit(vport, sp);
if (fabric_param_changed) {
/* Reset FDMI attribute masks based on config parameter */
if (phba->cfg_enable_SmartSAN ||
(phba->cfg_fdmi_on == LPFC_FDMI_SUPPORT)) {
/* Setup appropriate attribute masks */
vport->fdmi_hba_mask = LPFC_FDMI2_HBA_ATTR;
if (phba->cfg_enable_SmartSAN)
vport->fdmi_port_mask = LPFC_FDMI2_SMART_ATTR;
else
vport->fdmi_port_mask = LPFC_FDMI2_PORT_ATTR;
} else {
vport->fdmi_hba_mask = 0;
vport->fdmi_port_mask = 0;
}
}
memcpy(&vport->fabric_portname, &sp->portName,
sizeof(struct lpfc_name));
memcpy(&vport->fabric_nodename, &sp->nodeName,
sizeof(struct lpfc_name));
memcpy(&phba->fc_fabparam, sp, sizeof(struct serv_parm));
if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) {
if (sp->cmn.response_multiple_NPort) {
lpfc_printf_vlog(vport, KERN_WARNING,
LOG_ELS | LOG_VPORT,
"1816 FLOGI NPIV supported, "
"response data 0x%x\n",
sp->cmn.response_multiple_NPort);
spin_lock_irq(&phba->hbalock);
phba->link_flag |= LS_NPIV_FAB_SUPPORTED;
spin_unlock_irq(&phba->hbalock);
} else {
/* Because we asked f/w for NPIV it still expects us
to call reg_vnpid at least for the physical host */
lpfc_printf_vlog(vport, KERN_WARNING,
LOG_ELS | LOG_VPORT,
"1817 Fabric does not support NPIV "
"- configuring single port mode.\n");
spin_lock_irq(&phba->hbalock);
phba->link_flag &= ~LS_NPIV_FAB_SUPPORTED;
spin_unlock_irq(&phba->hbalock);
}
}
/*
* For FC we need to do some special processing because of the SLI
* Port's default settings of the Common Service Parameters.
*/
if ((phba->sli_rev == LPFC_SLI_REV4) &&
(phba->sli4_hba.lnk_info.lnk_tp == LPFC_LNK_TYPE_FC)) {
/* If physical FC port changed, unreg VFI and ALL VPIs / RPIs */
if (fabric_param_changed)
lpfc_unregister_fcf_prep(phba);
/* This should just update the VFI CSPs*/
if (vport->fc_flag & FC_VFI_REGISTERED)
lpfc_issue_reg_vfi(vport);
}
if (fabric_param_changed &&
!(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) {
/* 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) {
if ((np->nlp_state != NLP_STE_NPR_NODE) ||
!(np->nlp_flag & NLP_NPR_ADISC))
continue;
spin_lock_irq(&np->lock);
np->nlp_flag &= ~NLP_NPR_ADISC;
spin_unlock_irq(&np->lock);
lpfc_unreg_rpi(vport, np);
}
lpfc_cleanup_pending_mbox(vport);
if (phba->sli_rev == LPFC_SLI_REV4) {
lpfc_sli4_unreg_all_rpis(vport);
lpfc_mbx_unreg_vpi(vport);
spin_lock_irq(shost->host_lock);
vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
spin_unlock_irq(shost->host_lock);
}
/*
* For SLI3 and SLI4, the VPI needs to be reregistered in
* response to this fabric parameter change event.
*/
spin_lock_irq(shost->host_lock);
vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
spin_unlock_irq(shost->host_lock);
} else if ((phba->sli_rev == LPFC_SLI_REV4) &&
!(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) {
/*
* Driver needs to re-reg VPI in order for f/w
* to update the MAC address.
*/
lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
lpfc_register_new_vport(phba, vport, ndlp);
return 0;
}
if (phba->sli_rev < LPFC_SLI_REV4) {
lpfc_nlp_set_state(vport, ndlp, NLP_STE_REG_LOGIN_ISSUE);
if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED &&
vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)
lpfc_register_new_vport(phba, vport, ndlp);
else
lpfc_issue_fabric_reglogin(vport);
} else {
ndlp->nlp_type |= NLP_FABRIC;
lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
if ((!(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) &&
(vport->vpi_state & LPFC_VPI_REGISTERED)) {
lpfc_start_fdiscs(phba);
lpfc_do_scr_ns_plogi(phba, vport);
} else if (vport->fc_flag & FC_VFI_REGISTERED)
lpfc_issue_init_vpi(vport);
else {
lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
"3135 Need register VFI: (x%x/%x)\n",
vport->fc_prevDID, vport->fc_myDID);
lpfc_issue_reg_vfi(vport);
}
}
return 0;
}
/**
* lpfc_cmpl_els_flogi_nport - Completion function for flogi to an N_Port
* @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
**/
static int
lpfc_cmpl_els_flogi_nport(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
struct serv_parm *sp)
{
struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
struct lpfc_hba *phba = vport->phba;
LPFC_MBOXQ_t *mbox;
int rc;
spin_lock_irq(shost->host_lock);
vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
vport->fc_flag |= FC_PT2PT;
spin_unlock_irq(shost->host_lock);
/* If we are pt2pt with another NPort, force NPIV off! */
phba->sli3_options &= ~LPFC_SLI3_NPIV_ENABLED;
/* If physical FC port changed, unreg VFI and ALL VPIs / RPIs */
if ((phba->sli_rev == LPFC_SLI_REV4) && phba->fc_topology_changed) {
lpfc_unregister_fcf_prep(phba);
spin_lock_irq(shost->host_lock);
vport->fc_flag &= ~FC_VFI_REGISTERED;
spin_unlock_irq(shost->host_lock);
phba->fc_topology_changed = 0;
}
rc = memcmp(&vport->fc_portname, &sp->portName,
sizeof(vport->fc_portname));
if (rc >= 0) {
/* This side will initiate the PLOGI */
spin_lock_irq(shost->host_lock);
vport->fc_flag |= FC_PT2PT_PLOGI;
spin_unlock_irq(shost->host_lock);
/*
* N_Port ID cannot be 0, set our Id to LocalID
* the other side will be RemoteID.
*/
/* not equal */
if (rc)
vport->fc_myDID = PT2PT_LocalID;
/* Decrement ndlp reference count indicating that ndlp can be
* safely released when other references to it are done.
*/
lpfc_nlp_put(ndlp);
ndlp = lpfc_findnode_did(vport, PT2PT_RemoteID);
if (!ndlp) {
/*
* Cannot find existing Fabric ndlp, so allocate a
* new one
*/
ndlp = lpfc_nlp_init(vport, PT2PT_RemoteID);
if (!ndlp)
goto fail;
}
memcpy(&ndlp->nlp_portname, &sp->portName,
sizeof(struct lpfc_name));
memcpy(&ndlp->nlp_nodename, &sp->nodeName,
sizeof(struct lpfc_name));
/* Set state will put ndlp onto node list if not already done */
lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
spin_lock_irq(&ndlp->lock);
ndlp->nlp_flag |= NLP_NPR_2B_DISC;
spin_unlock_irq(&ndlp->lock);
mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
if (!mbox)
goto fail;
lpfc_config_link(phba, mbox);
mbox->mbox_cmpl = lpfc_mbx_cmpl_local_config_link;
mbox->vport = vport;
rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
if (rc == MBX_NOT_FINISHED) {
mempool_free(mbox, phba->mbox_mem_pool);
goto fail;
}
} 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.
*/
lpfc_nlp_put(ndlp);
/* Start discovery - this should just do CLEAR_LA */
lpfc_disc_start(vport);
}
return 0;
fail:
return -ENXIO;
}
/**
* lpfc_cmpl_els_flogi - Completion callback function for flogi
* @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.
**/
static void
lpfc_cmpl_els_flogi(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);
IOCB_t *irsp = &rspiocb->iocb;
struct lpfc_nodelist *ndlp = cmdiocb->context1;
struct lpfc_dmabuf *pcmd = cmdiocb->context2, *prsp;
struct serv_parm *sp;
uint16_t fcf_index;
int rc;
/* Check to see if link went down during discovery */
if (lpfc_els_chk_latt(vport)) {
/* One additional decrement on node reference count to
* trigger the release of the node