v4.19.13 snapshot.
diff --git a/drivers/scsi/fnic/fnic_fcs.c b/drivers/scsi/fnic/fnic_fcs.c
new file mode 100644
index 0000000..c7bf316
--- /dev/null
+++ b/drivers/scsi/fnic/fnic_fcs.c
@@ -0,0 +1,1403 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * 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.
+ */
+#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;
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+
+ 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;
+ fnic->link_status = vnic_dev_link_status(fnic->vdev);
+ fnic->link_down_cnt = vnic_dev_link_down_cnt(fnic->vdev);
+
+ 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_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);
+}
+
+/**
+ * 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;
+ enum fip_desc_type els_dtype = 0;
+ u16 op;
+ u8 els_op;
+ u8 sub;
+
+ size_t els_len = 0;
+ 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_len = dlen - sizeof(*els);
+ els = (struct fip_encaps *)desc;
+ fh = (struct fc_frame_header *)(els + 1);
+ els_dtype = desc->fip_dtype;
+
+ 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;
+ int fr_len;
+ 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;
+
+ fr_len = sizeof(*vlan);
+ 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;
+ unsigned int eth_hdrs_stripped;
+ 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;
+
+ pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
+ PCI_DMA_FROMDEVICE);
+ 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);
+ eth_hdrs_stripped = 1;
+ 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);
+ eth_hdrs_stripped = 0;
+ 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 = pci_map_single(fnic->pdev, skb->data, len, PCI_DMA_FROMDEVICE);
+
+ if (pci_dma_mapping_error(fnic->pdev, 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);
+
+ pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
+ PCI_DMA_FROMDEVICE);
+
+ 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;
+ int r;
+
+ 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 = pci_map_single(fnic->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
+
+ r = pci_dma_mapping_error(fnic->pdev, pa);
+ if (r) {
+ printk(KERN_ERR "PCI mapping failed with error %d\n", r);
+ 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);
+ pci_unmap_single(fnic->pdev, pa, skb->len, PCI_DMA_TODEVICE);
+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 = pci_map_single(fnic->pdev, eth_hdr, tot_len, PCI_DMA_TODEVICE);
+
+ if (pci_dma_mapping_error(fnic->pdev, 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)) {
+ pci_unmap_single(fnic->pdev, pa,
+ tot_len, PCI_DMA_TODEVICE);
+ 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);
+
+ pci_unmap_single(fnic->pdev, buf->dma_addr,
+ buf->len, PCI_DMA_TODEVICE);
+ 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);
+
+ pci_unmap_single(fnic->pdev, buf->dma_addr,
+ buf->len, PCI_DMA_TODEVICE);
+
+ 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 (printk_ratelimit())
+ FNIC_FCS_DBG(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);
+ shost_printk(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 (printk_ratelimit())
+ FNIC_FCS_DBG(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
+ */
+ shost_printk(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);
+ shost_printk(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;
+ }
+}