drivers/scsi/fnic/fnic_fcs.c - kernel/msm-4.9 - Gitiles

 /*
  * 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/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 "cq_enet_desc.h"
 #include "cq_exch_desc.h"

 struct workqueue_struct *fnic_event_queue;

 static void fnic_set_eth_mode(struct fnic *);

 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);

 	if (old_link_status == fnic->link_status) {
 		if (!fnic->link_status)
 			/* DOWN -> DOWN */
 			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 		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_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 					     "link down\n");
 				fcoe_ctlr_link_down(&fnic->ctlr);
 				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);
 		}
 	} else if (fnic->link_status) {
 		/* DOWN -> UP */
 		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 		FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link up\n");
 		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");
 		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);
 	}
 }

 /**
  * 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 = (struct ethhdr *)skb_pull(skb, VLAN_HLEN);
 		skb_reset_mac_header(skb);
 	}
 	if (eh->h_proto == htons(ETH_P_FIP)) {
 		skb_pull(skb, sizeof(*eh));
 		fcoe_ctlr_recv(&fnic->ctlr, skb);
 		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 (!compare_ether_addr(data, new))
 		return;
 	FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "update_mac %pM\n", new);
 	if (!is_zero_ether_addr(data) && compare_ether_addr(data, ctl))
 		vnic_dev_del_addr(fnic->vdev, data);
 	memcpy(data, new, ETH_ALEN);
 	if (compare_ether_addr(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;
 	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) {
 			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) {
 		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);

 	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 cant 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;

 	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);
 	fnic_queue_rq_desc(rq, skb, pa, len);
 	return 0;
 }

 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;

 	if (!fnic->vlan_hw_insert) {
 		eth_hdr = (struct ethhdr *)skb_mac_header(skb);
 		vlan_hdr = (struct vlan_ethhdr *)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);
 	}

 	pa = pci_map_single(fnic->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);

 	spin_lock_irqsave(&fnic->wq_lock[0], flags);
 	if (!vnic_wq_desc_avail(wq)) {
 		pci_unmap_single(fnic->pdev, pa, skb->len, PCI_DMA_TODEVICE);
 		spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
 		kfree_skb(skb);
 		return;
 	}

 	fnic_queue_wq_eth_desc(wq, skb, pa, skb->len,
 			       fnic->vlan_hw_insert, fnic->vlan_id, 1);
 	spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
 }

 /*
  * 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 = (struct vlan_ethhdr *)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 = (struct ethhdr *)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);

 	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 fnic_send_frame_end;
 	}

 	fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp),
 			   fnic->vlan_hw_insert, fnic->vlan_id, 1, 1, 1);
 fnic_send_frame_end:
 	spin_unlock_irqrestore(&fnic->wq_lock[0], flags);

 	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->frame_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;
 }
	/*
	* 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/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 "cq_enet_desc.h"
	#include "cq_exch_desc.h"

	struct workqueue_struct *fnic_event_queue;

	static void fnic_set_eth_mode(struct fnic *);

	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);

	if (old_link_status == fnic->link_status) {
	if (!fnic->link_status)
	/* DOWN -> DOWN */
	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
	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_FCS_DBG(KERN_DEBUG, fnic->lport->host,
	"link down\n");
	fcoe_ctlr_link_down(&fnic->ctlr);
	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);
	}
	} else if (fnic->link_status) {
	/* DOWN -> UP */
	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
	FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link up\n");
	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");
	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);
	}
	}

	/**
	* 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 = (struct ethhdr *)skb_pull(skb, VLAN_HLEN);
	skb_reset_mac_header(skb);
	}
	if (eh->h_proto == htons(ETH_P_FIP)) {
	skb_pull(skb, sizeof(*eh));
	fcoe_ctlr_recv(&fnic->ctlr, skb);
	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 (!compare_ether_addr(data, new))
	return;
	FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "update_mac %pM\n", new);
	if (!is_zero_ether_addr(data) && compare_ether_addr(data, ctl))
	vnic_dev_del_addr(fnic->vdev, data);
	memcpy(data, new, ETH_ALEN);
	if (compare_ether_addr(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;
	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) {
	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) {
	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);

	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 cant 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;

	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);
	fnic_queue_rq_desc(rq, skb, pa, len);
	return 0;
	}

	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;

	if (!fnic->vlan_hw_insert) {
	eth_hdr = (struct ethhdr *)skb_mac_header(skb);
	vlan_hdr = (struct vlan_ethhdr *)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);
	}

	pa = pci_map_single(fnic->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);

	spin_lock_irqsave(&fnic->wq_lock[0], flags);
	if (!vnic_wq_desc_avail(wq)) {
	pci_unmap_single(fnic->pdev, pa, skb->len, PCI_DMA_TODEVICE);
	spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
	kfree_skb(skb);
	return;
	}

	fnic_queue_wq_eth_desc(wq, skb, pa, skb->len,
	fnic->vlan_hw_insert, fnic->vlan_id, 1);
	spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
	}

	/*
	* 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 = (struct vlan_ethhdr *)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 = (struct ethhdr *)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);

	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 fnic_send_frame_end;
	}

	fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp),
	fnic->vlan_hw_insert, fnic->vlan_id, 1, 1, 1);
	fnic_send_frame_end:
	spin_unlock_irqrestore(&fnic->wq_lock[0], flags);

	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->frame_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;
	}