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lpfc_hbadisc.c
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lpfc_hbadisc.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. *
*******************************************************************/
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/kthread.h>
#include <linux/interrupt.h>
#include <linux/lockdep.h>
#include <linux/utsname.h>
#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport_fc.h>
#include <scsi/fc/fc_fs.h>
#include "lpfc_hw4.h"
#include "lpfc_hw.h"
#include "lpfc_nl.h"
#include "lpfc_disc.h"
#include "lpfc_sli.h"
#include "lpfc_sli4.h"
#include "lpfc.h"
#include "lpfc_scsi.h"
#include "lpfc_nvme.h"
#include "lpfc_logmsg.h"
#include "lpfc_crtn.h"
#include "lpfc_vport.h"
#include "lpfc_debugfs.h"
/* AlpaArray for assignment of scsid for scan-down and bind_method */
static uint8_t lpfcAlpaArray[] = {
0xEF, 0xE8, 0xE4, 0xE2, 0xE1, 0xE0, 0xDC, 0xDA, 0xD9, 0xD6,
0xD5, 0xD4, 0xD3, 0xD2, 0xD1, 0xCE, 0xCD, 0xCC, 0xCB, 0xCA,
0xC9, 0xC7, 0xC6, 0xC5, 0xC3, 0xBC, 0xBA, 0xB9, 0xB6, 0xB5,
0xB4, 0xB3, 0xB2, 0xB1, 0xAE, 0xAD, 0xAC, 0xAB, 0xAA, 0xA9,
0xA7, 0xA6, 0xA5, 0xA3, 0x9F, 0x9E, 0x9D, 0x9B, 0x98, 0x97,
0x90, 0x8F, 0x88, 0x84, 0x82, 0x81, 0x80, 0x7C, 0x7A, 0x79,
0x76, 0x75, 0x74, 0x73, 0x72, 0x71, 0x6E, 0x6D, 0x6C, 0x6B,
0x6A, 0x69, 0x67, 0x66, 0x65, 0x63, 0x5C, 0x5A, 0x59, 0x56,
0x55, 0x54, 0x53, 0x52, 0x51, 0x4E, 0x4D, 0x4C, 0x4B, 0x4A,
0x49, 0x47, 0x46, 0x45, 0x43, 0x3C, 0x3A, 0x39, 0x36, 0x35,
0x34, 0x33, 0x32, 0x31, 0x2E, 0x2D, 0x2C, 0x2B, 0x2A, 0x29,
0x27, 0x26, 0x25, 0x23, 0x1F, 0x1E, 0x1D, 0x1B, 0x18, 0x17,
0x10, 0x0F, 0x08, 0x04, 0x02, 0x01
};
static void lpfc_disc_timeout_handler(struct lpfc_vport *);
static void lpfc_disc_flush_list(struct lpfc_vport *vport);
static void lpfc_unregister_fcfi_cmpl(struct lpfc_hba *, LPFC_MBOXQ_t *);
static int lpfc_fcf_inuse(struct lpfc_hba *);
static void lpfc_mbx_cmpl_read_sparam(struct lpfc_hba *, LPFC_MBOXQ_t *);
static void lpfc_check_inactive_vmid(struct lpfc_hba *phba);
static void lpfc_check_vmid_qfpa_issue(struct lpfc_hba *phba);
static int
lpfc_valid_xpt_node(struct lpfc_nodelist *ndlp)
{
if (ndlp->nlp_fc4_type ||
ndlp->nlp_type & NLP_FABRIC)
return 1;
return 0;
}
/* The source of a terminate rport I/O is either a dev_loss_tmo
* event or a call to fc_remove_host. While the rport should be
* valid during these downcalls, the transport can call twice
* in a single event. This routine provides somoe protection
* as the NDLP isn't really free, just released to the pool.
*/
static int
lpfc_rport_invalid(struct fc_rport *rport)
{
struct lpfc_rport_data *rdata;
struct lpfc_nodelist *ndlp;
if (!rport) {
pr_err("**** %s: NULL rport, exit.\n", __func__);
return -EINVAL;
}
rdata = rport->dd_data;
if (!rdata) {
pr_err("**** %s: NULL dd_data on rport x%px SID x%x\n",
__func__, rport, rport->scsi_target_id);
return -EINVAL;
}
ndlp = rdata->pnode;
if (!rdata->pnode) {
pr_err("**** %s: NULL ndlp on rport x%px SID x%x\n",
__func__, rport, rport->scsi_target_id);
return -EINVAL;
}
if (!ndlp->vport) {
pr_err("**** %s: Null vport on ndlp x%px, DID x%x rport x%px "
"SID x%x\n", __func__, ndlp, ndlp->nlp_DID, rport,
rport->scsi_target_id);
return -EINVAL;
}
return 0;
}
void
lpfc_terminate_rport_io(struct fc_rport *rport)
{
struct lpfc_rport_data *rdata;
struct lpfc_nodelist *ndlp;
struct lpfc_vport *vport;
if (lpfc_rport_invalid(rport))
return;
rdata = rport->dd_data;
ndlp = rdata->pnode;
vport = ndlp->vport;
lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
"rport terminate: sid:x%x did:x%x flg:x%x",
ndlp->nlp_sid, ndlp->nlp_DID, ndlp->nlp_flag);
if (ndlp->nlp_sid != NLP_NO_SID)
lpfc_sli_abort_iocb(vport, ndlp->nlp_sid, 0, LPFC_CTX_TGT);
}
/*
* This function will be called when dev_loss_tmo fire.
*/
void
lpfc_dev_loss_tmo_callbk(struct fc_rport *rport)
{
struct lpfc_nodelist *ndlp;
struct lpfc_vport *vport;
struct lpfc_hba *phba;
struct lpfc_work_evt *evtp;
unsigned long iflags;
ndlp = ((struct lpfc_rport_data *)rport->dd_data)->pnode;
if (!ndlp)
return;
vport = ndlp->vport;
phba = vport->phba;
lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
"rport devlosscb: sid:x%x did:x%x flg:x%x",
ndlp->nlp_sid, ndlp->nlp_DID, ndlp->nlp_flag);
lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NODE,
"3181 dev_loss_callbk x%06x, rport x%px flg x%x "
"load_flag x%x refcnt %d\n",
ndlp->nlp_DID, ndlp->rport, ndlp->nlp_flag,
vport->load_flag, kref_read(&ndlp->kref));
/* Don't schedule a worker thread event if the vport is going down.
* The teardown process cleans up the node via lpfc_drop_node.
*/
if (vport->load_flag & FC_UNLOADING) {
((struct lpfc_rport_data *)rport->dd_data)->pnode = NULL;
ndlp->rport = NULL;
ndlp->fc4_xpt_flags &= ~SCSI_XPT_REGD;
/* Remove the node reference from remote_port_add now.
* The driver will not call remote_port_delete.
*/
lpfc_nlp_put(ndlp);
return;
}
if (ndlp->nlp_state == NLP_STE_MAPPED_NODE)
return;
if (rport->port_name != wwn_to_u64(ndlp->nlp_portname.u.wwn))
lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
"6789 rport name %llx != node port name %llx",
rport->port_name,
wwn_to_u64(ndlp->nlp_portname.u.wwn));
evtp = &ndlp->dev_loss_evt;
if (!list_empty(&evtp->evt_listp)) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
"6790 rport name %llx dev_loss_evt pending\n",
rport->port_name);
return;
}
spin_lock_irqsave(&ndlp->lock, iflags);
ndlp->nlp_flag |= NLP_IN_DEV_LOSS;
ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
/*
* The backend does not expect any more calls associated with this
* rport. Remove the association between rport and ndlp.
*/
ndlp->fc4_xpt_flags &= ~SCSI_XPT_REGD;
((struct lpfc_rport_data *)rport->dd_data)->pnode = NULL;
ndlp->rport = NULL;
spin_unlock_irqrestore(&ndlp->lock, iflags);
/* We need to hold the node by incrementing the reference
* count until this queued work is done
*/
evtp->evt_arg1 = lpfc_nlp_get(ndlp);
spin_lock_irqsave(&phba->hbalock, iflags);
if (evtp->evt_arg1) {
evtp->evt = LPFC_EVT_DEV_LOSS;
list_add_tail(&evtp->evt_listp, &phba->work_list);
lpfc_worker_wake_up(phba);
}
spin_unlock_irqrestore(&phba->hbalock, iflags);
return;
}
/**
* lpfc_check_inactive_vmid_one - VMID inactivity checker for a vport
* @vport: Pointer to vport context object.
*
* This function checks for idle VMID entries related to a particular vport. If
* found unused/idle, free them accordingly.
**/
static void lpfc_check_inactive_vmid_one(struct lpfc_vport *vport)
{
u16 keep;
u32 difftime = 0, r, bucket;
u64 *lta;
int cpu;
struct lpfc_vmid *vmp;
write_lock(&vport->vmid_lock);
if (!vport->cur_vmid_cnt)
goto out;
/* iterate through the table */
hash_for_each(vport->hash_table, bucket, vmp, hnode) {
keep = 0;
if (vmp->flag & LPFC_VMID_REGISTERED) {
/* check if the particular VMID is in use */
/* for all available per cpu variable */
for_each_possible_cpu(cpu) {
/* if last access time is less than timeout */
lta = per_cpu_ptr(vmp->last_io_time, cpu);
if (!lta)
continue;
difftime = (jiffies) - (*lta);
if ((vport->vmid_inactivity_timeout *
JIFFIES_PER_HR) > difftime) {
keep = 1;
break;
}
}
/* if none of the cpus have been used by the vm, */
/* remove the entry if already registered */
if (!keep) {
/* mark the entry for deregistration */
vmp->flag = LPFC_VMID_DE_REGISTER;
write_unlock(&vport->vmid_lock);
if (vport->vmid_priority_tagging)
r = lpfc_vmid_uvem(vport, vmp, false);
else
r = lpfc_vmid_cmd(vport,
SLI_CTAS_DAPP_IDENT,
vmp);
/* decrement number of active vms and mark */
/* entry in slot as free */
write_lock(&vport->vmid_lock);
if (!r) {
struct lpfc_vmid *ht = vmp;
vport->cur_vmid_cnt--;
ht->flag = LPFC_VMID_SLOT_FREE;
free_percpu(ht->last_io_time);
ht->last_io_time = NULL;
hash_del(&ht->hnode);
}
}
}
}
out:
write_unlock(&vport->vmid_lock);
}
/**
* lpfc_check_inactive_vmid - VMID inactivity checker
* @phba: Pointer to hba context object.
*
* This function is called from the worker thread to determine if an entry in
* the VMID table can be released since there was no I/O activity seen from that
* particular VM for the specified time. When this happens, the entry in the
* table is released and also the resources on the switch cleared.
**/
static void lpfc_check_inactive_vmid(struct lpfc_hba *phba)
{
struct lpfc_vport *vport;
struct lpfc_vport **vports;
int i;
vports = lpfc_create_vport_work_array(phba);
if (!vports)
return;
for (i = 0; i <= phba->max_vports; i++) {
if ((!vports[i]) && (i == 0))
vport = phba->pport;
else
vport = vports[i];
if (!vport)
break;
lpfc_check_inactive_vmid_one(vport);
}
lpfc_destroy_vport_work_array(phba, vports);
}
/**
* lpfc_dev_loss_tmo_handler - Remote node devloss timeout handler
* @ndlp: Pointer to remote node object.
*
* This function is called from the worker thread when devloss timeout timer
* expires. For SLI4 host, this routine shall return 1 when at lease one
* remote node, including this @ndlp, is still in use of FCF; otherwise, this
* routine shall return 0 when there is no remote node is still in use of FCF
* when devloss timeout happened to this @ndlp.
**/
static int
lpfc_dev_loss_tmo_handler(struct lpfc_nodelist *ndlp)
{
struct lpfc_vport *vport;
struct lpfc_hba *phba;
uint8_t *name;
int warn_on = 0;
int fcf_inuse = 0;
unsigned long iflags;
vport = ndlp->vport;
name = (uint8_t *)&ndlp->nlp_portname;
phba = vport->phba;
spin_lock_irqsave(&ndlp->lock, iflags);
ndlp->nlp_flag &= ~NLP_IN_DEV_LOSS;
spin_unlock_irqrestore(&ndlp->lock, iflags);
if (phba->sli_rev == LPFC_SLI_REV4)
fcf_inuse = lpfc_fcf_inuse(phba);
lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
"rport devlosstmo:did:x%x type:x%x id:x%x",
ndlp->nlp_DID, ndlp->nlp_type, ndlp->nlp_sid);
lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NODE,
"3182 %s x%06x, nflag x%x xflags x%x refcnt %d\n",
__func__, ndlp->nlp_DID, ndlp->nlp_flag,
ndlp->fc4_xpt_flags, kref_read(&ndlp->kref));
/* If the driver is recovering the rport, ignore devloss. */
if (ndlp->nlp_state == NLP_STE_MAPPED_NODE) {
lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
"0284 Devloss timeout Ignored on "
"WWPN %x:%x:%x:%x:%x:%x:%x:%x "
"NPort x%x\n",
*name, *(name+1), *(name+2), *(name+3),
*(name+4), *(name+5), *(name+6), *(name+7),
ndlp->nlp_DID);
return fcf_inuse;
}
/* Fabric nodes are done. */
if (ndlp->nlp_type & NLP_FABRIC) {
lpfc_nlp_put(ndlp);
return fcf_inuse;
}
if (ndlp->nlp_sid != NLP_NO_SID) {
warn_on = 1;
lpfc_sli_abort_iocb(vport, ndlp->nlp_sid, 0, LPFC_CTX_TGT);
}
if (warn_on) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
"0203 Devloss timeout on "
"WWPN %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x "
"NPort x%06x Data: x%x x%x x%x\n",
*name, *(name+1), *(name+2), *(name+3),
*(name+4), *(name+5), *(name+6), *(name+7),
ndlp->nlp_DID, ndlp->nlp_flag,
ndlp->nlp_state, ndlp->nlp_rpi);
} else {
lpfc_printf_vlog(vport, KERN_INFO, LOG_TRACE_EVENT,
"0204 Devloss timeout on "
"WWPN %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x "
"NPort x%06x Data: x%x x%x x%x\n",
*name, *(name+1), *(name+2), *(name+3),
*(name+4), *(name+5), *(name+6), *(name+7),
ndlp->nlp_DID, ndlp->nlp_flag,
ndlp->nlp_state, ndlp->nlp_rpi);
}
if (!(ndlp->fc4_xpt_flags & NVME_XPT_REGD))
lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM);
return fcf_inuse;
}
static void lpfc_check_vmid_qfpa_issue(struct lpfc_hba *phba)
{
struct lpfc_vport *vport;
struct lpfc_vport **vports;
int i;
vports = lpfc_create_vport_work_array(phba);
if (!vports)
return;
for (i = 0; i <= phba->max_vports; i++) {
if ((!vports[i]) && (i == 0))
vport = phba->pport;
else
vport = vports[i];
if (!vport)
break;
if (vport->vmid_flag & LPFC_VMID_ISSUE_QFPA) {
if (!lpfc_issue_els_qfpa(vport))
vport->vmid_flag &= ~LPFC_VMID_ISSUE_QFPA;
}
}
lpfc_destroy_vport_work_array(phba, vports);
}
/**
* lpfc_sli4_post_dev_loss_tmo_handler - SLI4 post devloss timeout handler
* @phba: Pointer to hba context object.
* @fcf_inuse: SLI4 FCF in-use state reported from devloss timeout handler.
* @nlp_did: remote node identifer with devloss timeout.
*
* This function is called from the worker thread after invoking devloss
* timeout handler and releasing the reference count for the ndlp with
* which the devloss timeout was handled for SLI4 host. For the devloss
* timeout of the last remote node which had been in use of FCF, when this
* routine is invoked, it shall be guaranteed that none of the remote are
* in-use of FCF. When devloss timeout to the last remote using the FCF,
* if the FIP engine is neither in FCF table scan process nor roundrobin
* failover process, the in-use FCF shall be unregistered. If the FIP
* engine is in FCF discovery process, the devloss timeout state shall
* be set for either the FCF table scan process or roundrobin failover
* process to unregister the in-use FCF.
**/
static void
lpfc_sli4_post_dev_loss_tmo_handler(struct lpfc_hba *phba, int fcf_inuse,
uint32_t nlp_did)
{
/* If devloss timeout happened to a remote node when FCF had no
* longer been in-use, do nothing.
*/
if (!fcf_inuse)
return;
if ((phba->hba_flag & HBA_FIP_SUPPORT) && !lpfc_fcf_inuse(phba)) {
spin_lock_irq(&phba->hbalock);
if (phba->fcf.fcf_flag & FCF_DISCOVERY) {
if (phba->hba_flag & HBA_DEVLOSS_TMO) {
spin_unlock_irq(&phba->hbalock);
return;
}
phba->hba_flag |= HBA_DEVLOSS_TMO;
lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
"2847 Last remote node (x%x) using "
"FCF devloss tmo\n", nlp_did);
}
if (phba->fcf.fcf_flag & FCF_REDISC_PROG) {
spin_unlock_irq(&phba->hbalock);
lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
"2868 Devloss tmo to FCF rediscovery "
"in progress\n");
return;
}
if (!(phba->hba_flag & (FCF_TS_INPROG | FCF_RR_INPROG))) {
spin_unlock_irq(&phba->hbalock);
lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
"2869 Devloss tmo to idle FIP engine, "
"unreg in-use FCF and rescan.\n");
/* Unregister in-use FCF and rescan */
lpfc_unregister_fcf_rescan(phba);
return;
}
spin_unlock_irq(&phba->hbalock);
if (phba->hba_flag & FCF_TS_INPROG)
lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
"2870 FCF table scan in progress\n");
if (phba->hba_flag & FCF_RR_INPROG)
lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
"2871 FLOGI roundrobin FCF failover "
"in progress\n");
}
lpfc_unregister_unused_fcf(phba);
}
/**
* lpfc_alloc_fast_evt - Allocates data structure for posting event
* @phba: Pointer to hba context object.
*
* This function is called from the functions which need to post
* events from interrupt context. This function allocates data
* structure required for posting event. It also keeps track of
* number of events pending and prevent event storm when there are
* too many events.
**/
struct lpfc_fast_path_event *
lpfc_alloc_fast_evt(struct lpfc_hba *phba) {
struct lpfc_fast_path_event *ret;
/* If there are lot of fast event do not exhaust memory due to this */
if (atomic_read(&phba->fast_event_count) > LPFC_MAX_EVT_COUNT)
return NULL;
ret = kzalloc(sizeof(struct lpfc_fast_path_event),
GFP_ATOMIC);
if (ret) {
atomic_inc(&phba->fast_event_count);
INIT_LIST_HEAD(&ret->work_evt.evt_listp);
ret->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT;
}
return ret;
}
/**
* lpfc_free_fast_evt - Frees event data structure
* @phba: Pointer to hba context object.
* @evt: Event object which need to be freed.
*
* This function frees the data structure required for posting
* events.
**/
void
lpfc_free_fast_evt(struct lpfc_hba *phba,
struct lpfc_fast_path_event *evt) {
atomic_dec(&phba->fast_event_count);
kfree(evt);
}
/**
* lpfc_send_fastpath_evt - Posts events generated from fast path
* @phba: Pointer to hba context object.
* @evtp: Event data structure.
*
* This function is called from worker thread, when the interrupt
* context need to post an event. This function posts the event
* to fc transport netlink interface.
**/
static void
lpfc_send_fastpath_evt(struct lpfc_hba *phba,
struct lpfc_work_evt *evtp)
{
unsigned long evt_category, evt_sub_category;
struct lpfc_fast_path_event *fast_evt_data;
char *evt_data;
uint32_t evt_data_size;
struct Scsi_Host *shost;
fast_evt_data = container_of(evtp, struct lpfc_fast_path_event,
work_evt);
evt_category = (unsigned long) fast_evt_data->un.fabric_evt.event_type;
evt_sub_category = (unsigned long) fast_evt_data->un.
fabric_evt.subcategory;
shost = lpfc_shost_from_vport(fast_evt_data->vport);
if (evt_category == FC_REG_FABRIC_EVENT) {
if (evt_sub_category == LPFC_EVENT_FCPRDCHKERR) {
evt_data = (char *) &fast_evt_data->un.read_check_error;
evt_data_size = sizeof(fast_evt_data->un.
read_check_error);
} else if ((evt_sub_category == LPFC_EVENT_FABRIC_BUSY) ||
(evt_sub_category == LPFC_EVENT_PORT_BUSY)) {
evt_data = (char *) &fast_evt_data->un.fabric_evt;
evt_data_size = sizeof(fast_evt_data->un.fabric_evt);
} else {
lpfc_free_fast_evt(phba, fast_evt_data);
return;
}
} else if (evt_category == FC_REG_SCSI_EVENT) {
switch (evt_sub_category) {
case LPFC_EVENT_QFULL:
case LPFC_EVENT_DEVBSY:
evt_data = (char *) &fast_evt_data->un.scsi_evt;
evt_data_size = sizeof(fast_evt_data->un.scsi_evt);
break;
case LPFC_EVENT_CHECK_COND:
evt_data = (char *) &fast_evt_data->un.check_cond_evt;
evt_data_size = sizeof(fast_evt_data->un.
check_cond_evt);
break;
case LPFC_EVENT_VARQUEDEPTH:
evt_data = (char *) &fast_evt_data->un.queue_depth_evt;
evt_data_size = sizeof(fast_evt_data->un.
queue_depth_evt);
break;
default:
lpfc_free_fast_evt(phba, fast_evt_data);
return;
}
} else {
lpfc_free_fast_evt(phba, fast_evt_data);
return;
}
if (phba->cfg_enable_fc4_type != LPFC_ENABLE_NVME)
fc_host_post_vendor_event(shost,
fc_get_event_number(),
evt_data_size,
evt_data,
LPFC_NL_VENDOR_ID);
lpfc_free_fast_evt(phba, fast_evt_data);
return;
}
static void
lpfc_work_list_done(struct lpfc_hba *phba)
{
struct lpfc_work_evt *evtp = NULL;
struct lpfc_nodelist *ndlp;
int free_evt;
int fcf_inuse;
uint32_t nlp_did;
spin_lock_irq(&phba->hbalock);
while (!list_empty(&phba->work_list)) {
list_remove_head((&phba->work_list), evtp, typeof(*evtp),
evt_listp);
spin_unlock_irq(&phba->hbalock);
free_evt = 1;
switch (evtp->evt) {
case LPFC_EVT_ELS_RETRY:
ndlp = (struct lpfc_nodelist *) (evtp->evt_arg1);
lpfc_els_retry_delay_handler(ndlp);
free_evt = 0; /* evt is part of ndlp */
/* decrement the node reference count held
* for this queued work
*/
lpfc_nlp_put(ndlp);
break;
case LPFC_EVT_DEV_LOSS:
ndlp = (struct lpfc_nodelist *)(evtp->evt_arg1);
fcf_inuse = lpfc_dev_loss_tmo_handler(ndlp);
free_evt = 0;
/* decrement the node reference count held for
* this queued work
*/
nlp_did = ndlp->nlp_DID;
lpfc_nlp_put(ndlp);
if (phba->sli_rev == LPFC_SLI_REV4)
lpfc_sli4_post_dev_loss_tmo_handler(phba,
fcf_inuse,
nlp_did);
break;
case LPFC_EVT_RECOVER_PORT:
ndlp = (struct lpfc_nodelist *)(evtp->evt_arg1);
lpfc_sli_abts_recover_port(ndlp->vport, ndlp);
free_evt = 0;
/* decrement the node reference count held for
* this queued work
*/
lpfc_nlp_put(ndlp);
break;
case LPFC_EVT_ONLINE:
if (phba->link_state < LPFC_LINK_DOWN)
*(int *) (evtp->evt_arg1) = lpfc_online(phba);
else
*(int *) (evtp->evt_arg1) = 0;
complete((struct completion *)(evtp->evt_arg2));
break;
case LPFC_EVT_OFFLINE_PREP:
if (phba->link_state >= LPFC_LINK_DOWN)
lpfc_offline_prep(phba, LPFC_MBX_WAIT);
*(int *)(evtp->evt_arg1) = 0;
complete((struct completion *)(evtp->evt_arg2));
break;
case LPFC_EVT_OFFLINE:
lpfc_offline(phba);
lpfc_sli_brdrestart(phba);
*(int *)(evtp->evt_arg1) =
lpfc_sli_brdready(phba, HS_FFRDY | HS_MBRDY);
lpfc_unblock_mgmt_io(phba);
complete((struct completion *)(evtp->evt_arg2));
break;
case LPFC_EVT_WARM_START:
lpfc_offline(phba);
lpfc_reset_barrier(phba);
lpfc_sli_brdreset(phba);
lpfc_hba_down_post(phba);
*(int *)(evtp->evt_arg1) =
lpfc_sli_brdready(phba, HS_MBRDY);
lpfc_unblock_mgmt_io(phba);
complete((struct completion *)(evtp->evt_arg2));
break;
case LPFC_EVT_KILL:
lpfc_offline(phba);
*(int *)(evtp->evt_arg1)
= (phba->pport->stopped)
? 0 : lpfc_sli_brdkill(phba);
lpfc_unblock_mgmt_io(phba);
complete((struct completion *)(evtp->evt_arg2));
break;
case LPFC_EVT_FASTPATH_MGMT_EVT:
lpfc_send_fastpath_evt(phba, evtp);
free_evt = 0;
break;
case LPFC_EVT_RESET_HBA:
if (!(phba->pport->load_flag & FC_UNLOADING))
lpfc_reset_hba(phba);
break;
}
if (free_evt)
kfree(evtp);
spin_lock_irq(&phba->hbalock);
}
spin_unlock_irq(&phba->hbalock);
}
static void
lpfc_work_done(struct lpfc_hba *phba)
{
struct lpfc_sli_ring *pring;
uint32_t ha_copy, status, control, work_port_events;
struct lpfc_vport **vports;
struct lpfc_vport *vport;
int i;
spin_lock_irq(&phba->hbalock);
ha_copy = phba->work_ha;
phba->work_ha = 0;
spin_unlock_irq(&phba->hbalock);
/* First, try to post the next mailbox command to SLI4 device */
if (phba->pci_dev_grp == LPFC_PCI_DEV_OC)
lpfc_sli4_post_async_mbox(phba);
if (ha_copy & HA_ERATT)
/* Handle the error attention event */
lpfc_handle_eratt(phba);
if (ha_copy & HA_MBATT)
lpfc_sli_handle_mb_event(phba);
if (ha_copy & HA_LATT)
lpfc_handle_latt(phba);
/* Handle VMID Events */
if (lpfc_is_vmid_enabled(phba)) {
if (phba->pport->work_port_events &
WORKER_CHECK_VMID_ISSUE_QFPA) {
lpfc_check_vmid_qfpa_issue(phba);
phba->pport->work_port_events &=
~WORKER_CHECK_VMID_ISSUE_QFPA;
}
if (phba->pport->work_port_events &
WORKER_CHECK_INACTIVE_VMID) {
lpfc_check_inactive_vmid(phba);
phba->pport->work_port_events &=
~WORKER_CHECK_INACTIVE_VMID;
}
}
/* Process SLI4 events */
if (phba->pci_dev_grp == LPFC_PCI_DEV_OC) {
if (phba->hba_flag & HBA_RRQ_ACTIVE)
lpfc_handle_rrq_active(phba);
if (phba->hba_flag & ELS_XRI_ABORT_EVENT)
lpfc_sli4_els_xri_abort_event_proc(phba);
if (phba->hba_flag & ASYNC_EVENT)
lpfc_sli4_async_event_proc(phba);
if (phba->hba_flag & HBA_POST_RECEIVE_BUFFER) {
spin_lock_irq(&phba->hbalock);
phba->hba_flag &= ~HBA_POST_RECEIVE_BUFFER;
spin_unlock_irq(&phba->hbalock);
lpfc_sli_hbqbuf_add_hbqs(phba, LPFC_ELS_HBQ);
}
if (phba->fcf.fcf_flag & FCF_REDISC_EVT)
lpfc_sli4_fcf_redisc_event_proc(phba);
}
vports = lpfc_create_vport_work_array(phba);
if (vports != NULL)
for (i = 0; i <= phba->max_vports; i++) {
/*
* We could have no vports in array if unloading, so if
* this happens then just use the pport
*/
if (vports[i] == NULL && i == 0)
vport = phba->pport;
else
vport = vports[i];
if (vport == NULL)
break;
spin_lock_irq(&vport->work_port_lock);
work_port_events = vport->work_port_events;
vport->work_port_events &= ~work_port_events;
spin_unlock_irq(&vport->work_port_lock);
if (work_port_events & WORKER_DISC_TMO)
lpfc_disc_timeout_handler(vport);
if (work_port_events & WORKER_ELS_TMO)
lpfc_els_timeout_handler(vport);
if (work_port_events & WORKER_HB_TMO)
lpfc_hb_timeout_handler(phba);
if (work_port_events & WORKER_MBOX_TMO)
lpfc_mbox_timeout_handler(phba);
if (work_port_events & WORKER_FABRIC_BLOCK_TMO)
lpfc_unblock_fabric_iocbs(phba);
if (work_port_events & WORKER_RAMP_DOWN_QUEUE)
lpfc_ramp_down_queue_handler(phba);
if (work_port_events & WORKER_DELAYED_DISC_TMO)
lpfc_delayed_disc_timeout_handler(vport);
}
lpfc_destroy_vport_work_array(phba, vports);
pring = lpfc_phba_elsring(phba);
status = (ha_copy & (HA_RXMASK << (4*LPFC_ELS_RING)));
status >>= (4*LPFC_ELS_RING);
if (pring && (status & HA_RXMASK ||
pring->flag & LPFC_DEFERRED_RING_EVENT ||
phba->hba_flag & HBA_SP_QUEUE_EVT)) {
if (pring->flag & LPFC_STOP_IOCB_EVENT) {
pring->flag |= LPFC_DEFERRED_RING_EVENT;
/* Preserve legacy behavior. */
if (!(phba->hba_flag & HBA_SP_QUEUE_EVT))
set_bit(LPFC_DATA_READY, &phba->data_flags);
} else {
/* Driver could have abort request completed in queue
* when link goes down. Allow for this transition.
*/
if (phba->link_state >= LPFC_LINK_DOWN ||
phba->link_flag & LS_MDS_LOOPBACK) {
pring->flag &= ~LPFC_DEFERRED_RING_EVENT;
lpfc_sli_handle_slow_ring_event(phba, pring,
(status &
HA_RXMASK));
}
}
if (phba->sli_rev == LPFC_SLI_REV4)
lpfc_drain_txq(phba);
/*
* Turn on Ring interrupts
*/
if (phba->sli_rev <= LPFC_SLI_REV3) {
spin_lock_irq(&phba->hbalock);
control = readl(phba->HCregaddr);
if (!(control & (HC_R0INT_ENA << LPFC_ELS_RING))) {
lpfc_debugfs_slow_ring_trc(phba,
"WRK Enable ring: cntl:x%x hacopy:x%x",
control, ha_copy, 0);
control |= (HC_R0INT_ENA << LPFC_ELS_RING);
writel(control, phba->HCregaddr);
readl(phba->HCregaddr); /* flush */
} else {
lpfc_debugfs_slow_ring_trc(phba,
"WRK Ring ok: cntl:x%x hacopy:x%x",
control, ha_copy, 0);
}
spin_unlock_irq(&phba->hbalock);
}
}
lpfc_work_list_done(phba);
}
int
lpfc_do_work(void *p)
{
struct lpfc_hba *phba = p;
int rc;
set_user_nice(current, MIN_NICE);
current->flags |= PF_NOFREEZE;
phba->data_flags = 0;
while (!kthread_should_stop()) {
/* wait and check worker queue activities */
rc = wait_event_interruptible(phba->work_waitq,
(test_and_clear_bit(LPFC_DATA_READY,
&phba->data_flags)
|| kthread_should_stop()));
/* Signal wakeup shall terminate the worker thread */
if (rc) {
lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
"0433 Wakeup on signal: rc=x%x\n", rc);
break;
}
/* Attend pending lpfc data processing */
lpfc_work_done(phba);
}
phba->worker_thread = NULL;
lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
"0432 Worker thread stopped.\n");
return 0;
}
/*
* This is only called to handle FC worker events. Since this a rare
* occurrence, we allocate a struct lpfc_work_evt structure here instead of
* embedding it in the IOCB.
*/
int
lpfc_workq_post_event(struct lpfc_hba *phba, void *arg1, void *arg2,
uint32_t evt)
{
struct lpfc_work_evt *evtp;
unsigned long flags;
/*
* All Mailbox completions and LPFC_ELS_RING rcv ring IOCB events will
* be queued to worker thread for processing
*/
evtp = kmalloc(sizeof(struct lpfc_work_evt), GFP_ATOMIC);
if (!evtp)
return 0;
evtp->evt_arg1 = arg1;
evtp->evt_arg2 = arg2;
evtp->evt = evt;
spin_lock_irqsave(&phba->hbalock, flags);
list_add_tail(&evtp->evt_listp, &phba->work_list);
spin_unlock_irqrestore(&phba->hbalock, flags);
lpfc_worker_wake_up(phba);
return 1;
}
void
lpfc_cleanup_rpis(struct lpfc_vport *vport, int remove)
{
struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
struct lpfc_hba *phba = vport->phba;
struct lpfc_nodelist *ndlp, *next_ndlp;
list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
continue;
if ((phba->sli3_options & LPFC_SLI3_VPORT_TEARDOWN) ||
((vport->port_type == LPFC_NPIV_PORT) &&
((ndlp->nlp_DID == NameServer_DID) ||
(ndlp->nlp_DID == FDMI_DID) ||
(ndlp->nlp_DID == Fabric_Cntl_DID))))
lpfc_unreg_rpi(vport, ndlp);
/* Leave Fabric nodes alone on link down */
if ((phba->sli_rev < LPFC_SLI_REV4) &&
(!remove && ndlp->nlp_type & NLP_FABRIC))
continue;
/* Notify transport of connectivity loss to trigger cleanup. */
if (phba->nvmet_support &&
ndlp->nlp_state == NLP_STE_UNMAPPED_NODE)
lpfc_nvmet_invalidate_host(phba, ndlp);
lpfc_disc_state_machine(vport, ndlp, NULL,
remove
? NLP_EVT_DEVICE_RM
: NLP_EVT_DEVICE_RECOVERY);
}
if (phba->sli3_options & LPFC_SLI3_VPORT_TEARDOWN) {
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_REG_VPI;
spin_unlock_irq(shost->host_lock);