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linux/drivers/scsi/fnic/fnic_fcs.c
Thomas Gleixner e6550b3ee1 treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_168.RULE (part 1) 
Based on the normalized pattern:

    this program is free software you may redistribute it and/or modify it
    under the terms of the gnu general public license as published by the
    free software foundation version 2 of the license  the software is
    provided as is without warranty of any kind express or implied
    including but not limited to the warranties of merchantability fitness
    for a particular purpose and noninfringement in no event shall the
    authors or copyright holders be liable for any claim damages or other
    liability whether in an action of contract tort or otherwise arising
    from out of or in connection with the software or the use or other
    dealings in the software

extracted by the scancode license scanner the SPDX license identifier

    GPL-2.0-only

has been chosen to replace the boilerplate/reference.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-06-10 14:51:36 +02:00

1398 lines
38 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2008 Cisco Systems, Inc. All rights reserved.
* Copyright 2007 Nuova Systems, Inc. All rights reserved.
*/
#include <linux/errno.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <linux/workqueue.h>
#include <scsi/fc/fc_fip.h>
#include <scsi/fc/fc_els.h>
#include <scsi/fc/fc_fcoe.h>
#include <scsi/fc_frame.h>
#include <scsi/libfc.h>
#include "fnic_io.h"
#include "fnic.h"
#include "fnic_fip.h"
#include "cq_enet_desc.h"
#include "cq_exch_desc.h"
static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS;
struct workqueue_struct *fnic_fip_queue;
struct workqueue_struct *fnic_event_queue;
static void fnic_set_eth_mode(struct fnic *);
static void fnic_fcoe_send_vlan_req(struct fnic *fnic);
static void fnic_fcoe_start_fcf_disc(struct fnic *fnic);
static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *);
static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag);
static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb);
void fnic_handle_link(struct work_struct *work)
{
struct fnic *fnic = container_of(work, struct fnic, link_work);
unsigned long flags;
int old_link_status;
u32 old_link_down_cnt;
u64 old_port_speed, new_port_speed;
spin_lock_irqsave(&fnic->fnic_lock, flags);
fnic->link_events = 1; /* less work to just set everytime*/
if (fnic->stop_rx_link_events) {
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
return;
}
old_link_down_cnt = fnic->link_down_cnt;
old_link_status = fnic->link_status;
old_port_speed = atomic64_read(
&fnic->fnic_stats.misc_stats.current_port_speed);
fnic->link_status = vnic_dev_link_status(fnic->vdev);
fnic->link_down_cnt = vnic_dev_link_down_cnt(fnic->vdev);
new_port_speed = vnic_dev_port_speed(fnic->vdev);
atomic64_set(&fnic->fnic_stats.misc_stats.current_port_speed,
new_port_speed);
if (old_port_speed != new_port_speed)
FNIC_MAIN_DBG(KERN_INFO, fnic->lport->host,
"Current vnic speed set to : %llu\n",
new_port_speed);
switch (vnic_dev_port_speed(fnic->vdev)) {
case DCEM_PORTSPEED_10G:
fc_host_speed(fnic->lport->host) = FC_PORTSPEED_10GBIT;
fnic->lport->link_supported_speeds = FC_PORTSPEED_10GBIT;
break;
case DCEM_PORTSPEED_20G:
fc_host_speed(fnic->lport->host) = FC_PORTSPEED_20GBIT;
fnic->lport->link_supported_speeds = FC_PORTSPEED_20GBIT;
break;
case DCEM_PORTSPEED_25G:
fc_host_speed(fnic->lport->host) = FC_PORTSPEED_25GBIT;
fnic->lport->link_supported_speeds = FC_PORTSPEED_25GBIT;
break;
case DCEM_PORTSPEED_40G:
case DCEM_PORTSPEED_4x10G:
fc_host_speed(fnic->lport->host) = FC_PORTSPEED_40GBIT;
fnic->lport->link_supported_speeds = FC_PORTSPEED_40GBIT;
break;
case DCEM_PORTSPEED_100G:
fc_host_speed(fnic->lport->host) = FC_PORTSPEED_100GBIT;
fnic->lport->link_supported_speeds = FC_PORTSPEED_100GBIT;
break;
default:
fc_host_speed(fnic->lport->host) = FC_PORTSPEED_UNKNOWN;
fnic->lport->link_supported_speeds = FC_PORTSPEED_UNKNOWN;
break;
}
if (old_link_status == fnic->link_status) {
if (!fnic->link_status) {
/* DOWN -> DOWN */
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
fnic_fc_trace_set_data(fnic->lport->host->host_no,
FNIC_FC_LE, "Link Status: DOWN->DOWN",
strlen("Link Status: DOWN->DOWN"));
} else {
if (old_link_down_cnt != fnic->link_down_cnt) {
/* UP -> DOWN -> UP */
fnic->lport->host_stats.link_failure_count++;
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
fnic_fc_trace_set_data(
fnic->lport->host->host_no,
FNIC_FC_LE,
"Link Status:UP_DOWN_UP",
strlen("Link_Status:UP_DOWN_UP")
);
FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
"link down\n");
fcoe_ctlr_link_down(&fnic->ctlr);
if (fnic->config.flags & VFCF_FIP_CAPABLE) {
/* start FCoE VLAN discovery */
fnic_fc_trace_set_data(
fnic->lport->host->host_no,
FNIC_FC_LE,
"Link Status: UP_DOWN_UP_VLAN",
strlen(
"Link Status: UP_DOWN_UP_VLAN")
);
fnic_fcoe_send_vlan_req(fnic);
return;
}
FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
"link up\n");
fcoe_ctlr_link_up(&fnic->ctlr);
} else {
/* UP -> UP */
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
fnic_fc_trace_set_data(
fnic->lport->host->host_no, FNIC_FC_LE,
"Link Status: UP_UP",
strlen("Link Status: UP_UP"));
}
}
} else if (fnic->link_status) {
/* DOWN -> UP */
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
if (fnic->config.flags & VFCF_FIP_CAPABLE) {
/* start FCoE VLAN discovery */
fnic_fc_trace_set_data(
fnic->lport->host->host_no,
FNIC_FC_LE, "Link Status: DOWN_UP_VLAN",
strlen("Link Status: DOWN_UP_VLAN"));
fnic_fcoe_send_vlan_req(fnic);
return;
}
FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link up\n");
fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_LE,
"Link Status: DOWN_UP", strlen("Link Status: DOWN_UP"));
fcoe_ctlr_link_up(&fnic->ctlr);
} else {
/* UP -> DOWN */
fnic->lport->host_stats.link_failure_count++;
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link down\n");
fnic_fc_trace_set_data(
fnic->lport->host->host_no, FNIC_FC_LE,
"Link Status: UP_DOWN",
strlen("Link Status: UP_DOWN"));
if (fnic->config.flags & VFCF_FIP_CAPABLE) {
FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
"deleting fip-timer during link-down\n");
del_timer_sync(&fnic->fip_timer);
}
fcoe_ctlr_link_down(&fnic->ctlr);
}
}
/*
* This function passes incoming fabric frames to libFC
*/
void fnic_handle_frame(struct work_struct *work)
{
struct fnic *fnic = container_of(work, struct fnic, frame_work);
struct fc_lport *lp = fnic->lport;
unsigned long flags;
struct sk_buff *skb;
struct fc_frame *fp;
while ((skb = skb_dequeue(&fnic->frame_queue))) {
spin_lock_irqsave(&fnic->fnic_lock, flags);
if (fnic->stop_rx_link_events) {
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
dev_kfree_skb(skb);
return;
}
fp = (struct fc_frame *)skb;
/*
* If we're in a transitional state, just re-queue and return.
* The queue will be serviced when we get to a stable state.
*/
if (fnic->state != FNIC_IN_FC_MODE &&
fnic->state != FNIC_IN_ETH_MODE) {
skb_queue_head(&fnic->frame_queue, skb);
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
return;
}
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
fc_exch_recv(lp, fp);
}
}
void fnic_fcoe_evlist_free(struct fnic *fnic)
{
struct fnic_event *fevt = NULL;
struct fnic_event *next = NULL;
unsigned long flags;
spin_lock_irqsave(&fnic->fnic_lock, flags);
if (list_empty(&fnic->evlist)) {
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
return;
}
list_for_each_entry_safe(fevt, next, &fnic->evlist, list) {
list_del(&fevt->list);
kfree(fevt);
}
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
}
void fnic_handle_event(struct work_struct *work)
{
struct fnic *fnic = container_of(work, struct fnic, event_work);
struct fnic_event *fevt = NULL;
struct fnic_event *next = NULL;
unsigned long flags;
spin_lock_irqsave(&fnic->fnic_lock, flags);
if (list_empty(&fnic->evlist)) {
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
return;
}
list_for_each_entry_safe(fevt, next, &fnic->evlist, list) {
if (fnic->stop_rx_link_events) {
list_del(&fevt->list);
kfree(fevt);
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
return;
}
/*
* If we're in a transitional state, just re-queue and return.
* The queue will be serviced when we get to a stable state.
*/
if (fnic->state != FNIC_IN_FC_MODE &&
fnic->state != FNIC_IN_ETH_MODE) {
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
return;
}
list_del(&fevt->list);
switch (fevt->event) {
case FNIC_EVT_START_VLAN_DISC:
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
fnic_fcoe_send_vlan_req(fnic);
spin_lock_irqsave(&fnic->fnic_lock, flags);
break;
case FNIC_EVT_START_FCF_DISC:
FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
"Start FCF Discovery\n");
fnic_fcoe_start_fcf_disc(fnic);
break;
default:
FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
"Unknown event 0x%x\n", fevt->event);
break;
}
kfree(fevt);
}
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
}
/**
* is_fnic_fip_flogi_reject() - Check if the Received FIP FLOGI frame is rejected
* @fip: The FCoE controller that received the frame
* @skb: The received FIP frame
*
* Returns non-zero if the frame is rejected with unsupported cmd with
* insufficient resource els explanation.
*/
static inline int is_fnic_fip_flogi_reject(struct fcoe_ctlr *fip,
struct sk_buff *skb)
{
struct fc_lport *lport = fip->lp;
struct fip_header *fiph;
struct fc_frame_header *fh = NULL;
struct fip_desc *desc;
struct fip_encaps *els;
u16 op;
u8 els_op;
u8 sub;
size_t rlen;
size_t dlen = 0;
if (skb_linearize(skb))
return 0;
if (skb->len < sizeof(*fiph))
return 0;
fiph = (struct fip_header *)skb->data;
op = ntohs(fiph->fip_op);
sub = fiph->fip_subcode;
if (op != FIP_OP_LS)
return 0;
if (sub != FIP_SC_REP)
return 0;
rlen = ntohs(fiph->fip_dl_len) * 4;
if (rlen + sizeof(*fiph) > skb->len)
return 0;
desc = (struct fip_desc *)(fiph + 1);
dlen = desc->fip_dlen * FIP_BPW;
if (desc->fip_dtype == FIP_DT_FLOGI) {
if (dlen < sizeof(*els) + sizeof(*fh) + 1)
return 0;
els = (struct fip_encaps *)desc;
fh = (struct fc_frame_header *)(els + 1);
if (!fh)
return 0;
/*
* ELS command code, reason and explanation should be = Reject,
* unsupported command and insufficient resource
*/
els_op = *(u8 *)(fh + 1);
if (els_op == ELS_LS_RJT) {
shost_printk(KERN_INFO, lport->host,
"Flogi Request Rejected by Switch\n");
return 1;
}
shost_printk(KERN_INFO, lport->host,
"Flogi Request Accepted by Switch\n");
}
return 0;
}
static void fnic_fcoe_send_vlan_req(struct fnic *fnic)
{
struct fcoe_ctlr *fip = &fnic->ctlr;
struct fnic_stats *fnic_stats = &fnic->fnic_stats;
struct sk_buff *skb;
char *eth_fr;
struct fip_vlan *vlan;
u64 vlan_tov;
fnic_fcoe_reset_vlans(fnic);
fnic->set_vlan(fnic, 0);
if (printk_ratelimit())
FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
"Sending VLAN request...\n");
skb = dev_alloc_skb(sizeof(struct fip_vlan));
if (!skb)
return;
eth_fr = (char *)skb->data;
vlan = (struct fip_vlan *)eth_fr;
memset(vlan, 0, sizeof(*vlan));
memcpy(vlan->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
memcpy(vlan->eth.h_dest, fcoe_all_fcfs, ETH_ALEN);
vlan->eth.h_proto = htons(ETH_P_FIP);
vlan->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
vlan->fip.fip_op = htons(FIP_OP_VLAN);
vlan->fip.fip_subcode = FIP_SC_VL_REQ;
vlan->fip.fip_dl_len = htons(sizeof(vlan->desc) / FIP_BPW);
vlan->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC;
vlan->desc.mac.fd_desc.fip_dlen = sizeof(vlan->desc.mac) / FIP_BPW;
memcpy(&vlan->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
vlan->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
vlan->desc.wwnn.fd_desc.fip_dlen = sizeof(vlan->desc.wwnn) / FIP_BPW;
put_unaligned_be64(fip->lp->wwnn, &vlan->desc.wwnn.fd_wwn);
atomic64_inc(&fnic_stats->vlan_stats.vlan_disc_reqs);
skb_put(skb, sizeof(*vlan));
skb->protocol = htons(ETH_P_FIP);
skb_reset_mac_header(skb);
skb_reset_network_header(skb);
fip->send(fip, skb);
/* set a timer so that we can retry if there no response */
vlan_tov = jiffies + msecs_to_jiffies(FCOE_CTLR_FIPVLAN_TOV);
mod_timer(&fnic->fip_timer, round_jiffies(vlan_tov));
}
static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *skb)
{
struct fcoe_ctlr *fip = &fnic->ctlr;
struct fip_header *fiph;
struct fip_desc *desc;
struct fnic_stats *fnic_stats = &fnic->fnic_stats;
u16 vid;
size_t rlen;
size_t dlen;
struct fcoe_vlan *vlan;
u64 sol_time;
unsigned long flags;
FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
"Received VLAN response...\n");
fiph = (struct fip_header *) skb->data;
FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
"Received VLAN response... OP 0x%x SUB_OP 0x%x\n",
ntohs(fiph->fip_op), fiph->fip_subcode);
rlen = ntohs(fiph->fip_dl_len) * 4;
fnic_fcoe_reset_vlans(fnic);
spin_lock_irqsave(&fnic->vlans_lock, flags);
desc = (struct fip_desc *)(fiph + 1);
while (rlen > 0) {
dlen = desc->fip_dlen * FIP_BPW;
switch (desc->fip_dtype) {
case FIP_DT_VLAN:
vid = ntohs(((struct fip_vlan_desc *)desc)->fd_vlan);
shost_printk(KERN_INFO, fnic->lport->host,
"process_vlan_resp: FIP VLAN %d\n", vid);
vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC);
if (!vlan) {
/* retry from timer */
spin_unlock_irqrestore(&fnic->vlans_lock,
flags);
goto out;
}
vlan->vid = vid & 0x0fff;
vlan->state = FIP_VLAN_AVAIL;
list_add_tail(&vlan->list, &fnic->vlans);
break;
}
desc = (struct fip_desc *)((char *)desc + dlen);
rlen -= dlen;
}
/* any VLAN descriptors present ? */
if (list_empty(&fnic->vlans)) {
/* retry from timer */
atomic64_inc(&fnic_stats->vlan_stats.resp_withno_vlanID);
FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
"No VLAN descriptors in FIP VLAN response\n");
spin_unlock_irqrestore(&fnic->vlans_lock, flags);
goto out;
}
vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
fnic->set_vlan(fnic, vlan->vid);
vlan->state = FIP_VLAN_SENT; /* sent now */
vlan->sol_count++;
spin_unlock_irqrestore(&fnic->vlans_lock, flags);
/* start the solicitation */
fcoe_ctlr_link_up(fip);
sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY);
mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
out:
return;
}
static void fnic_fcoe_start_fcf_disc(struct fnic *fnic)
{
unsigned long flags;
struct fcoe_vlan *vlan;
u64 sol_time;
spin_lock_irqsave(&fnic->vlans_lock, flags);
vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
fnic->set_vlan(fnic, vlan->vid);
vlan->state = FIP_VLAN_SENT; /* sent now */
vlan->sol_count = 1;
spin_unlock_irqrestore(&fnic->vlans_lock, flags);
/* start the solicitation */
fcoe_ctlr_link_up(&fnic->ctlr);
sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY);
mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
}
static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag)
{
unsigned long flags;
struct fcoe_vlan *fvlan;
spin_lock_irqsave(&fnic->vlans_lock, flags);
if (list_empty(&fnic->vlans)) {
spin_unlock_irqrestore(&fnic->vlans_lock, flags);
return -EINVAL;
}
fvlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
if (fvlan->state == FIP_VLAN_USED) {
spin_unlock_irqrestore(&fnic->vlans_lock, flags);
return 0;
}
if (fvlan->state == FIP_VLAN_SENT) {
fvlan->state = FIP_VLAN_USED;
spin_unlock_irqrestore(&fnic->vlans_lock, flags);
return 0;
}
spin_unlock_irqrestore(&fnic->vlans_lock, flags);
return -EINVAL;
}
static void fnic_event_enq(struct fnic *fnic, enum fnic_evt ev)
{
struct fnic_event *fevt;
unsigned long flags;
fevt = kmalloc(sizeof(*fevt), GFP_ATOMIC);
if (!fevt)
return;
fevt->fnic = fnic;
fevt->event = ev;
spin_lock_irqsave(&fnic->fnic_lock, flags);
list_add_tail(&fevt->list, &fnic->evlist);
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
schedule_work(&fnic->event_work);
}
static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb)
{
struct fip_header *fiph;
int ret = 1;
u16 op;
u8 sub;
if (!skb || !(skb->data))
return -1;
if (skb_linearize(skb))
goto drop;
fiph = (struct fip_header *)skb->data;
op = ntohs(fiph->fip_op);
sub = fiph->fip_subcode;
if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER)
goto drop;
if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len)
goto drop;
if (op == FIP_OP_DISC && sub == FIP_SC_ADV) {
if (fnic_fcoe_vlan_check(fnic, ntohs(fiph->fip_flags)))
goto drop;
/* pass it on to fcoe */
ret = 1;
} else if (op == FIP_OP_VLAN && sub == FIP_SC_VL_NOTE) {
/* set the vlan as used */
fnic_fcoe_process_vlan_resp(fnic, skb);
ret = 0;
} else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) {
/* received CVL request, restart vlan disc */
fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
/* pass it on to fcoe */
ret = 1;
}
drop:
return ret;
}
void fnic_handle_fip_frame(struct work_struct *work)
{
struct fnic *fnic = container_of(work, struct fnic, fip_frame_work);
struct fnic_stats *fnic_stats = &fnic->fnic_stats;
unsigned long flags;
struct sk_buff *skb;
struct ethhdr *eh;
while ((skb = skb_dequeue(&fnic->fip_frame_queue))) {
spin_lock_irqsave(&fnic->fnic_lock, flags);
if (fnic->stop_rx_link_events) {
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
dev_kfree_skb(skb);
return;
}
/*
* If we're in a transitional state, just re-queue and return.
* The queue will be serviced when we get to a stable state.
*/
if (fnic->state != FNIC_IN_FC_MODE &&
fnic->state != FNIC_IN_ETH_MODE) {
skb_queue_head(&fnic->fip_frame_queue, skb);
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
return;
}
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
eh = (struct ethhdr *)skb->data;
if (eh->h_proto == htons(ETH_P_FIP)) {
skb_pull(skb, sizeof(*eh));
if (fnic_fcoe_handle_fip_frame(fnic, skb) <= 0) {
dev_kfree_skb(skb);
continue;
}
/*
* If there's FLOGI rejects - clear all
* fcf's & restart from scratch
*/
if (is_fnic_fip_flogi_reject(&fnic->ctlr, skb)) {
atomic64_inc(
&fnic_stats->vlan_stats.flogi_rejects);
shost_printk(KERN_INFO, fnic->lport->host,
"Trigger a Link down - VLAN Disc\n");
fcoe_ctlr_link_down(&fnic->ctlr);
/* start FCoE VLAN discovery */
fnic_fcoe_send_vlan_req(fnic);
dev_kfree_skb(skb);
continue;
}
fcoe_ctlr_recv(&fnic->ctlr, skb);
continue;
}
}
}
/**
* fnic_import_rq_eth_pkt() - handle received FCoE or FIP frame.
* @fnic: fnic instance.
* @skb: Ethernet Frame.
*/
static inline int fnic_import_rq_eth_pkt(struct fnic *fnic, struct sk_buff *skb)
{
struct fc_frame *fp;
struct ethhdr *eh;
struct fcoe_hdr *fcoe_hdr;
struct fcoe_crc_eof *ft;
/*
* Undo VLAN encapsulation if present.
*/
eh = (struct ethhdr *)skb->data;
if (eh->h_proto == htons(ETH_P_8021Q)) {
memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);
eh = skb_pull(skb, VLAN_HLEN);
skb_reset_mac_header(skb);
}
if (eh->h_proto == htons(ETH_P_FIP)) {
if (!(fnic->config.flags & VFCF_FIP_CAPABLE)) {
printk(KERN_ERR "Dropped FIP frame, as firmware "
"uses non-FIP mode, Enable FIP "
"using UCSM\n");
goto drop;
}
if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
FNIC_FC_RECV|0x80, (char *)skb->data, skb->len)) != 0) {
printk(KERN_ERR "fnic ctlr frame trace error!!!");
}
skb_queue_tail(&fnic->fip_frame_queue, skb);
queue_work(fnic_fip_queue, &fnic->fip_frame_work);
return 1; /* let caller know packet was used */
}
if (eh->h_proto != htons(ETH_P_FCOE))
goto drop;
skb_set_network_header(skb, sizeof(*eh));
skb_pull(skb, sizeof(*eh));
fcoe_hdr = (struct fcoe_hdr *)skb->data;
if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER)
goto drop;
fp = (struct fc_frame *)skb;
fc_frame_init(fp);
fr_sof(fp) = fcoe_hdr->fcoe_sof;
skb_pull(skb, sizeof(struct fcoe_hdr));
skb_reset_transport_header(skb);
ft = (struct fcoe_crc_eof *)(skb->data + skb->len - sizeof(*ft));
fr_eof(fp) = ft->fcoe_eof;
skb_trim(skb, skb->len - sizeof(*ft));
return 0;
drop:
dev_kfree_skb_irq(skb);
return -1;
}
/**
* fnic_update_mac_locked() - set data MAC address and filters.
* @fnic: fnic instance.
* @new: newly-assigned FCoE MAC address.
*
* Called with the fnic lock held.
*/
void fnic_update_mac_locked(struct fnic *fnic, u8 *new)
{
u8 *ctl = fnic->ctlr.ctl_src_addr;
u8 *data = fnic->data_src_addr;
if (is_zero_ether_addr(new))
new = ctl;
if (ether_addr_equal(data, new))
return;
FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "update_mac %pM\n", new);
if (!is_zero_ether_addr(data) && !ether_addr_equal(data, ctl))
vnic_dev_del_addr(fnic->vdev, data);
memcpy(data, new, ETH_ALEN);
if (!ether_addr_equal(new, ctl))
vnic_dev_add_addr(fnic->vdev, new);
}
/**
* fnic_update_mac() - set data MAC address and filters.
* @lport: local port.
* @new: newly-assigned FCoE MAC address.
*/
void fnic_update_mac(struct fc_lport *lport, u8 *new)
{
struct fnic *fnic = lport_priv(lport);
spin_lock_irq(&fnic->fnic_lock);
fnic_update_mac_locked(fnic, new);
spin_unlock_irq(&fnic->fnic_lock);
}
/**
* fnic_set_port_id() - set the port_ID after successful FLOGI.
* @lport: local port.
* @port_id: assigned FC_ID.
* @fp: received frame containing the FLOGI accept or NULL.
*
* This is called from libfc when a new FC_ID has been assigned.
* This causes us to reset the firmware to FC_MODE and setup the new MAC
* address and FC_ID.
*
* It is also called with FC_ID 0 when we're logged off.
*
* If the FC_ID is due to point-to-point, fp may be NULL.
*/
void fnic_set_port_id(struct fc_lport *lport, u32 port_id, struct fc_frame *fp)
{
struct fnic *fnic = lport_priv(lport);
u8 *mac;
int ret;
FNIC_FCS_DBG(KERN_DEBUG, lport->host, "set port_id %x fp %p\n",
port_id, fp);
/*
* If we're clearing the FC_ID, change to use the ctl_src_addr.
* Set ethernet mode to send FLOGI.
*/
if (!port_id) {
fnic_update_mac(lport, fnic->ctlr.ctl_src_addr);
fnic_set_eth_mode(fnic);
return;
}
if (fp) {
mac = fr_cb(fp)->granted_mac;
if (is_zero_ether_addr(mac)) {
/* non-FIP - FLOGI already accepted - ignore return */
fcoe_ctlr_recv_flogi(&fnic->ctlr, lport, fp);
}
fnic_update_mac(lport, mac);
}
/* Change state to reflect transition to FC mode */
spin_lock_irq(&fnic->fnic_lock);
if (fnic->state == FNIC_IN_ETH_MODE || fnic->state == FNIC_IN_FC_MODE)
fnic->state = FNIC_IN_ETH_TRANS_FC_MODE;
else {
FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
"Unexpected fnic state %s while"
" processing flogi resp\n",
fnic_state_to_str(fnic->state));
spin_unlock_irq(&fnic->fnic_lock);
return;
}
spin_unlock_irq(&fnic->fnic_lock);
/*
* Send FLOGI registration to firmware to set up FC mode.
* The new address will be set up when registration completes.
*/
ret = fnic_flogi_reg_handler(fnic, port_id);
if (ret < 0) {
spin_lock_irq(&fnic->fnic_lock);
if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE)
fnic->state = FNIC_IN_ETH_MODE;
spin_unlock_irq(&fnic->fnic_lock);
}
}
static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc
*cq_desc, struct vnic_rq_buf *buf,
int skipped __attribute__((unused)),
void *opaque)
{
struct fnic *fnic = vnic_dev_priv(rq->vdev);
struct sk_buff *skb;
struct fc_frame *fp;
struct fnic_stats *fnic_stats = &fnic->fnic_stats;
u8 type, color, eop, sop, ingress_port, vlan_stripped;
u8 fcoe = 0, fcoe_sof, fcoe_eof;
u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0;
u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
u8 ipv6, ipv4, ipv4_fragment, rss_type, csum_not_calc;
u8 fcs_ok = 1, packet_error = 0;
u16 q_number, completed_index, bytes_written = 0, vlan, checksum;
u32 rss_hash;
u16 exchange_id, tmpl;
u8 sof = 0;
u8 eof = 0;
u32 fcp_bytes_written = 0;
unsigned long flags;
dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len,
DMA_FROM_DEVICE);
skb = buf->os_buf;
fp = (struct fc_frame *)skb;
buf->os_buf = NULL;
cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index);
if (type == CQ_DESC_TYPE_RQ_FCP) {
cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *)cq_desc,
&type, &color, &q_number, &completed_index,
&eop, &sop, &fcoe_fc_crc_ok, &exchange_id,
&tmpl, &fcp_bytes_written, &sof, &eof,
&ingress_port, &packet_error,
&fcoe_enc_error, &fcs_ok, &vlan_stripped,
&vlan);
skb_trim(skb, fcp_bytes_written);
fr_sof(fp) = sof;
fr_eof(fp) = eof;
} else if (type == CQ_DESC_TYPE_RQ_ENET) {
cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
&type, &color, &q_number, &completed_index,
&ingress_port, &fcoe, &eop, &sop,
&rss_type, &csum_not_calc, &rss_hash,
&bytes_written, &packet_error,
&vlan_stripped, &vlan, &checksum,
&fcoe_sof, &fcoe_fc_crc_ok,
&fcoe_enc_error, &fcoe_eof,
&tcp_udp_csum_ok, &udp, &tcp,
&ipv4_csum_ok, &ipv6, &ipv4,
&ipv4_fragment, &fcs_ok);
skb_trim(skb, bytes_written);
if (!fcs_ok) {
atomic64_inc(&fnic_stats->misc_stats.frame_errors);
FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
"fcs error. dropping packet.\n");
goto drop;
}
if (fnic_import_rq_eth_pkt(fnic, skb))
return;
} else {
/* wrong CQ type*/
shost_printk(KERN_ERR, fnic->lport->host,
"fnic rq_cmpl wrong cq type x%x\n", type);
goto drop;
}
if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) {
atomic64_inc(&fnic_stats->misc_stats.frame_errors);
FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
"fnic rq_cmpl fcoe x%x fcsok x%x"
" pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err"
" x%x\n",
fcoe, fcs_ok, packet_error,
fcoe_fc_crc_ok, fcoe_enc_error);
goto drop;
}
spin_lock_irqsave(&fnic->fnic_lock, flags);
if (fnic->stop_rx_link_events) {
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
goto drop;
}
fr_dev(fp) = fnic->lport;
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_RECV,
(char *)skb->data, skb->len)) != 0) {
printk(KERN_ERR "fnic ctlr frame trace error!!!");
}
skb_queue_tail(&fnic->frame_queue, skb);
queue_work(fnic_event_queue, &fnic->frame_work);
return;
drop:
dev_kfree_skb_irq(skb);
}
static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev,
struct cq_desc *cq_desc, u8 type,
u16 q_number, u16 completed_index,
void *opaque)
{
struct fnic *fnic = vnic_dev_priv(vdev);
vnic_rq_service(&fnic->rq[q_number], cq_desc, completed_index,
VNIC_RQ_RETURN_DESC, fnic_rq_cmpl_frame_recv,
NULL);
return 0;
}
int fnic_rq_cmpl_handler(struct fnic *fnic, int rq_work_to_do)
{
unsigned int tot_rq_work_done = 0, cur_work_done;
unsigned int i;
int err;
for (i = 0; i < fnic->rq_count; i++) {
cur_work_done = vnic_cq_service(&fnic->cq[i], rq_work_to_do,
fnic_rq_cmpl_handler_cont,
NULL);
if (cur_work_done) {
err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
if (err)
shost_printk(KERN_ERR, fnic->lport->host,
"fnic_alloc_rq_frame can't alloc"
" frame\n");
}
tot_rq_work_done += cur_work_done;
}
return tot_rq_work_done;
}
/*
* This function is called once at init time to allocate and fill RQ
* buffers. Subsequently, it is called in the interrupt context after RQ
* buffer processing to replenish the buffers in the RQ
*/
int fnic_alloc_rq_frame(struct vnic_rq *rq)
{
struct fnic *fnic = vnic_dev_priv(rq->vdev);
struct sk_buff *skb;
u16 len;
dma_addr_t pa;
int r;
len = FC_FRAME_HEADROOM + FC_MAX_FRAME + FC_FRAME_TAILROOM;
skb = dev_alloc_skb(len);
if (!skb) {
FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
"Unable to allocate RQ sk_buff\n");
return -ENOMEM;
}
skb_reset_mac_header(skb);
skb_reset_transport_header(skb);
skb_reset_network_header(skb);
skb_put(skb, len);
pa = dma_map_single(&fnic->pdev->dev, skb->data, len, DMA_FROM_DEVICE);
if (dma_mapping_error(&fnic->pdev->dev, pa)) {
r = -ENOMEM;
printk(KERN_ERR "PCI mapping failed with error %d\n", r);
goto free_skb;
}
fnic_queue_rq_desc(rq, skb, pa, len);
return 0;
free_skb:
kfree_skb(skb);
return r;
}
void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
{
struct fc_frame *fp = buf->os_buf;
struct fnic *fnic = vnic_dev_priv(rq->vdev);
dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len,
DMA_FROM_DEVICE);
dev_kfree_skb(fp_skb(fp));
buf->os_buf = NULL;
}
/**
* fnic_eth_send() - Send Ethernet frame.
* @fip: fcoe_ctlr instance.
* @skb: Ethernet Frame, FIP, without VLAN encapsulation.
*/
void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
{
struct fnic *fnic = fnic_from_ctlr(fip);
struct vnic_wq *wq = &fnic->wq[0];
dma_addr_t pa;
struct ethhdr *eth_hdr;
struct vlan_ethhdr *vlan_hdr;
unsigned long flags;
if (!fnic->vlan_hw_insert) {
eth_hdr = (struct ethhdr *)skb_mac_header(skb);
vlan_hdr = skb_push(skb, sizeof(*vlan_hdr) - sizeof(*eth_hdr));
memcpy(vlan_hdr, eth_hdr, 2 * ETH_ALEN);
vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
vlan_hdr->h_vlan_encapsulated_proto = eth_hdr->h_proto;
vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
FNIC_FC_SEND|0x80, (char *)eth_hdr, skb->len)) != 0) {
printk(KERN_ERR "fnic ctlr frame trace error!!!");
}
} else {
if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
FNIC_FC_SEND|0x80, (char *)skb->data, skb->len)) != 0) {
printk(KERN_ERR "fnic ctlr frame trace error!!!");
}
}
pa = dma_map_single(&fnic->pdev->dev, skb->data, skb->len,
DMA_TO_DEVICE);
if (dma_mapping_error(&fnic->pdev->dev, pa)) {
printk(KERN_ERR "DMA mapping failed\n");
goto free_skb;
}
spin_lock_irqsave(&fnic->wq_lock[0], flags);
if (!vnic_wq_desc_avail(wq))
goto irq_restore;
fnic_queue_wq_eth_desc(wq, skb, pa, skb->len,
0 /* hw inserts cos value */,
fnic->vlan_id, 1);
spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
return;
irq_restore:
spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
dma_unmap_single(&fnic->pdev->dev, pa, skb->len, DMA_TO_DEVICE);
free_skb:
kfree_skb(skb);
}
/*
* Send FC frame.
*/
static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp)
{
struct vnic_wq *wq = &fnic->wq[0];
struct sk_buff *skb;
dma_addr_t pa;
struct ethhdr *eth_hdr;
struct vlan_ethhdr *vlan_hdr;
struct fcoe_hdr *fcoe_hdr;
struct fc_frame_header *fh;
u32 tot_len, eth_hdr_len;
int ret = 0;
unsigned long flags;
fh = fc_frame_header_get(fp);
skb = fp_skb(fp);
if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
fcoe_ctlr_els_send(&fnic->ctlr, fnic->lport, skb))
return 0;
if (!fnic->vlan_hw_insert) {
eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr);
vlan_hdr = skb_push(skb, eth_hdr_len);
eth_hdr = (struct ethhdr *)vlan_hdr;
vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE);
vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1);
} else {
eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr);
eth_hdr = skb_push(skb, eth_hdr_len);
eth_hdr->h_proto = htons(ETH_P_FCOE);
fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1);
}
if (fnic->ctlr.map_dest)
fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
else
memcpy(eth_hdr->h_dest, fnic->ctlr.dest_addr, ETH_ALEN);
memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN);
tot_len = skb->len;
BUG_ON(tot_len % 4);
memset(fcoe_hdr, 0, sizeof(*fcoe_hdr));
fcoe_hdr->fcoe_sof = fr_sof(fp);
if (FC_FCOE_VER)
FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER);
pa = dma_map_single(&fnic->pdev->dev, eth_hdr, tot_len, DMA_TO_DEVICE);
if (dma_mapping_error(&fnic->pdev->dev, pa)) {
ret = -ENOMEM;
printk(KERN_ERR "DMA map failed with error %d\n", ret);
goto free_skb_on_err;
}
if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_SEND,
(char *)eth_hdr, tot_len)) != 0) {
printk(KERN_ERR "fnic ctlr frame trace error!!!");
}
spin_lock_irqsave(&fnic->wq_lock[0], flags);
if (!vnic_wq_desc_avail(wq)) {
dma_unmap_single(&fnic->pdev->dev, pa, tot_len, DMA_TO_DEVICE);
ret = -1;
goto irq_restore;
}
fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp),
0 /* hw inserts cos value */,
fnic->vlan_id, 1, 1, 1);
irq_restore:
spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
free_skb_on_err:
if (ret)
dev_kfree_skb_any(fp_skb(fp));
return ret;
}
/*
* fnic_send
* Routine to send a raw frame
*/
int fnic_send(struct fc_lport *lp, struct fc_frame *fp)
{
struct fnic *fnic = lport_priv(lp);
unsigned long flags;
if (fnic->in_remove) {
dev_kfree_skb(fp_skb(fp));
return -1;
}
/*
* Queue frame if in a transitional state.
* This occurs while registering the Port_ID / MAC address after FLOGI.
*/
spin_lock_irqsave(&fnic->fnic_lock, flags);
if (fnic->state != FNIC_IN_FC_MODE && fnic->state != FNIC_IN_ETH_MODE) {
skb_queue_tail(&fnic->tx_queue, fp_skb(fp));
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
return 0;
}
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
return fnic_send_frame(fnic, fp);
}
/**
* fnic_flush_tx() - send queued frames.
* @fnic: fnic device
*
* Send frames that were waiting to go out in FC or Ethernet mode.
* Whenever changing modes we purge queued frames, so these frames should
* be queued for the stable mode that we're in, either FC or Ethernet.
*
* Called without fnic_lock held.
*/
void fnic_flush_tx(struct fnic *fnic)
{
struct sk_buff *skb;
struct fc_frame *fp;
while ((skb = skb_dequeue(&fnic->tx_queue))) {
fp = (struct fc_frame *)skb;
fnic_send_frame(fnic, fp);
}
}
/**
* fnic_set_eth_mode() - put fnic into ethernet mode.
* @fnic: fnic device
*
* Called without fnic lock held.
*/
static void fnic_set_eth_mode(struct fnic *fnic)
{
unsigned long flags;
enum fnic_state old_state;
int ret;
spin_lock_irqsave(&fnic->fnic_lock, flags);
again:
old_state = fnic->state;
switch (old_state) {
case FNIC_IN_FC_MODE:
case FNIC_IN_ETH_TRANS_FC_MODE:
default:
fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
ret = fnic_fw_reset_handler(fnic);
spin_lock_irqsave(&fnic->fnic_lock, flags);
if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE)
goto again;
if (ret)
fnic->state = old_state;
break;
case FNIC_IN_FC_TRANS_ETH_MODE:
case FNIC_IN_ETH_MODE:
break;
}
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
}
static void fnic_wq_complete_frame_send(struct vnic_wq *wq,
struct cq_desc *cq_desc,
struct vnic_wq_buf *buf, void *opaque)
{
struct sk_buff *skb = buf->os_buf;
struct fc_frame *fp = (struct fc_frame *)skb;
struct fnic *fnic = vnic_dev_priv(wq->vdev);
dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len,
DMA_TO_DEVICE);
dev_kfree_skb_irq(fp_skb(fp));
buf->os_buf = NULL;
}
static int fnic_wq_cmpl_handler_cont(struct vnic_dev *vdev,
struct cq_desc *cq_desc, u8 type,
u16 q_number, u16 completed_index,
void *opaque)
{
struct fnic *fnic = vnic_dev_priv(vdev);
unsigned long flags;
spin_lock_irqsave(&fnic->wq_lock[q_number], flags);
vnic_wq_service(&fnic->wq[q_number], cq_desc, completed_index,
fnic_wq_complete_frame_send, NULL);
spin_unlock_irqrestore(&fnic->wq_lock[q_number], flags);
return 0;
}
int fnic_wq_cmpl_handler(struct fnic *fnic, int work_to_do)
{
unsigned int wq_work_done = 0;
unsigned int i;
for (i = 0; i < fnic->raw_wq_count; i++) {
wq_work_done += vnic_cq_service(&fnic->cq[fnic->rq_count+i],
work_to_do,
fnic_wq_cmpl_handler_cont,
NULL);
}
return wq_work_done;
}
void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
{
struct fc_frame *fp = buf->os_buf;
struct fnic *fnic = vnic_dev_priv(wq->vdev);
dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len,
DMA_TO_DEVICE);
dev_kfree_skb(fp_skb(fp));
buf->os_buf = NULL;
}
void fnic_fcoe_reset_vlans(struct fnic *fnic)
{
unsigned long flags;
struct fcoe_vlan *vlan;
struct fcoe_vlan *next;
/*
* indicate a link down to fcoe so that all fcf's are free'd
* might not be required since we did this before sending vlan
* discovery request
*/
spin_lock_irqsave(&fnic->vlans_lock, flags);
if (!list_empty(&fnic->vlans)) {
list_for_each_entry_safe(vlan, next, &fnic->vlans, list) {
list_del(&vlan->list);
kfree(vlan);
}
}
spin_unlock_irqrestore(&fnic->vlans_lock, flags);
}
void fnic_handle_fip_timer(struct fnic *fnic)
{
unsigned long flags;
struct fcoe_vlan *vlan;
struct fnic_stats *fnic_stats = &fnic->fnic_stats;
u64 sol_time;
spin_lock_irqsave(&fnic->fnic_lock, flags);
if (fnic->stop_rx_link_events) {
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
return;
}
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
if (fnic->ctlr.mode == FIP_MODE_NON_FIP)
return;
spin_lock_irqsave(&fnic->vlans_lock, flags);
if (list_empty(&fnic->vlans)) {
spin_unlock_irqrestore(&fnic->vlans_lock, flags);
/* no vlans available, try again */
if (unlikely(fnic_log_level & FNIC_FCS_LOGGING))
if (printk_ratelimit())
shost_printk(KERN_DEBUG, fnic->lport->host,
"Start VLAN Discovery\n");
fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
return;
}
vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
"fip_timer: vlan %d state %d sol_count %d\n",
vlan->vid, vlan->state, vlan->sol_count);
switch (vlan->state) {
case FIP_VLAN_USED:
FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
"FIP VLAN is selected for FC transaction\n");
spin_unlock_irqrestore(&fnic->vlans_lock, flags);
break;
case FIP_VLAN_FAILED:
spin_unlock_irqrestore(&fnic->vlans_lock, flags);
/* if all vlans are in failed state, restart vlan disc */
if (unlikely(fnic_log_level & FNIC_FCS_LOGGING))
if (printk_ratelimit())
shost_printk(KERN_DEBUG, fnic->lport->host,
"Start VLAN Discovery\n");
fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
break;
case FIP_VLAN_SENT:
if (vlan->sol_count >= FCOE_CTLR_MAX_SOL) {
/*
* no response on this vlan, remove from the list.
* Try the next vlan
*/
FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
"Dequeue this VLAN ID %d from list\n",
vlan->vid);
list_del(&vlan->list);
kfree(vlan);
vlan = NULL;
if (list_empty(&fnic->vlans)) {
/* we exhausted all vlans, restart vlan disc */
spin_unlock_irqrestore(&fnic->vlans_lock,
flags);
FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
"fip_timer: vlan list empty, "
"trigger vlan disc\n");
fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
return;
}
/* check the next vlan */
vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan,
list);
fnic->set_vlan(fnic, vlan->vid);
vlan->state = FIP_VLAN_SENT; /* sent now */
}
spin_unlock_irqrestore(&fnic->vlans_lock, flags);
atomic64_inc(&fnic_stats->vlan_stats.sol_expiry_count);
vlan->sol_count++;
sol_time = jiffies + msecs_to_jiffies
(FCOE_CTLR_START_DELAY);
mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
break;
}
}
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