[SCSI] fnic: Add new Cisco PCI-Express FCoE HBA

fnic is a driver for the Cisco PCI-Express FCoE HBA

Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com>
Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 742 insertions, 0 deletions

diff --git a/drivers/scsi/fnic/fnic_fcs.c b/drivers/scsi/fnic/fnic_fcs.c
new file mode 100644
index 00000000000..07e6eedb83c
--- /dev/null
+++ b/drivers/scsi/fnic/fnic_fcs.c
@@ -0,0 +1,742 @@
+/*
+ * 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_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;
+
+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");
+				fc_linkdown(fnic->lport);
+				FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
+					     "link up\n");
+				fc_linkup(fnic->lport);
+			} 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");
+		fc_linkup(fnic->lport);
+	} 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");
+		fc_linkdown(fnic->lport);
+	}
+
+}
+
+/*
+ * 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 Flogi resp frame, register the address */
+		if (fr_flags(fp)) {
+			vnic_dev_add_addr(fnic->vdev,
+					  fnic->data_src_addr);
+			fr_flags(fp) = 0;
+		}
+		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+		fc_exch_recv(lp, lp->emp, fp);
+	}
+
+}
+
+static inline void fnic_import_rq_fc_frame(struct sk_buff *skb,
+					   u32 len, u8 sof, u8 eof)
+{
+	struct fc_frame *fp = (struct fc_frame *)skb;
+
+	skb_trim(skb, len);
+	fr_eof(fp) = eof;
+	fr_sof(fp) = sof;
+}
+
+
+static inline int fnic_import_rq_eth_pkt(struct sk_buff *skb, u32 len)
+{
+	struct fc_frame *fp;
+	struct ethhdr *eh;
+	struct vlan_ethhdr *vh;
+	struct fcoe_hdr *fcoe_hdr;
+	struct fcoe_crc_eof *ft;
+	u32    transport_len = 0;
+
+	eh = (struct ethhdr *)skb->data;
+	vh = (struct vlan_ethhdr *)skb->data;
+	if (vh->h_vlan_proto == htons(ETH_P_8021Q) &&
+	    vh->h_vlan_encapsulated_proto == htons(ETH_P_FCOE)) {
+		skb_pull(skb, sizeof(struct vlan_ethhdr));
+		transport_len += sizeof(struct vlan_ethhdr);
+	} else if (eh->h_proto == htons(ETH_P_FCOE)) {
+		transport_len += sizeof(struct ethhdr);
+		skb_pull(skb, sizeof(struct ethhdr));
+	} else
+		return -1;
+
+	fcoe_hdr = (struct fcoe_hdr *)skb->data;
+	if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER)
+		return -1;
+
+	fp = (struct fc_frame *)skb;
+	fc_frame_init(fp);
+	fr_sof(fp) = fcoe_hdr->fcoe_sof;
+	skb_pull(skb, sizeof(struct fcoe_hdr));
+	transport_len += sizeof(struct fcoe_hdr);
+
+	ft = (struct fcoe_crc_eof *)(skb->data + len -
+				     transport_len - sizeof(*ft));
+	fr_eof(fp) = ft->fcoe_eof;
+	skb_trim(skb, len - transport_len - sizeof(*ft));
+	return 0;
+}
+
+static inline int fnic_handle_flogi_resp(struct fnic *fnic,
+					 struct fc_frame *fp)
+{
+	u8 mac[ETH_ALEN] = FC_FCOE_FLOGI_MAC;
+	struct ethhdr *eth_hdr;
+	struct fc_frame_header *fh;
+	int ret = 0;
+	unsigned long flags;
+	struct fc_frame *old_flogi_resp = NULL;
+
+	fh = (struct fc_frame_header *)fr_hdr(fp);
+
+	spin_lock_irqsave(&fnic->fnic_lock, flags);
+
+	if (fnic->state == FNIC_IN_ETH_MODE) {
+
+		/*
+		 * Check if oxid matches on taking the lock. A new Flogi
+		 * issued by libFC might have changed the fnic cached oxid
+		 */
+		if (fnic->flogi_oxid != ntohs(fh->fh_ox_id)) {
+			FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
+				     "Flogi response oxid not"
+				     " matching cached oxid, dropping frame"
+				     "\n");
+			ret = -1;
+			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+			dev_kfree_skb_irq(fp_skb(fp));
+			goto handle_flogi_resp_end;
+		}
+
+		/* Drop older cached flogi response frame, cache this frame */
+		old_flogi_resp = fnic->flogi_resp;
+		fnic->flogi_resp = fp;
+		fnic->flogi_oxid = FC_XID_UNKNOWN;
+
+		/*
+		 * this frame is part of flogi get the src mac addr from this
+		 * frame if the src mac is fcoui based then we mark the
+		 * address mode flag to use fcoui base for dst mac addr
+		 * otherwise we have to store the fcoe gateway addr
+		 */
+		eth_hdr = (struct ethhdr *)skb_mac_header(fp_skb(fp));
+		memcpy(mac, eth_hdr->h_source, ETH_ALEN);
+
+		if (ntoh24(mac) == FC_FCOE_OUI)
+			fnic->fcoui_mode = 1;
+		else {
+			fnic->fcoui_mode = 0;
+			memcpy(fnic->dest_addr, mac, ETH_ALEN);
+		}
+
+		/*
+		 * Except for Flogi frame, all outbound frames from us have the
+		 * Eth Src address as FC_FCOE_OUI"our_sid". Flogi frame uses
+		 * the vnic MAC address as the Eth Src address
+		 */
+		fc_fcoe_set_mac(fnic->data_src_addr, fh->fh_d_id);
+
+		/* We get our s_id from the d_id of the flogi resp frame */
+		fnic->s_id = ntoh24(fh->fh_d_id);
+
+		/* Change state to reflect transition from Eth to 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));
+		ret = -1;
+		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+		dev_kfree_skb_irq(fp_skb(fp));
+		goto handle_flogi_resp_end;
+	}
+
+	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+	/* Drop older cached frame */
+	if (old_flogi_resp)
+		dev_kfree_skb_irq(fp_skb(old_flogi_resp));
+
+	/*
+	 * send flogi reg request to firmware, this will put the fnic in
+	 * in FC mode
+	 */
+	ret = fnic_flogi_reg_handler(fnic);
+
+	if (ret < 0) {
+		int free_fp = 1;
+		spin_lock_irqsave(&fnic->fnic_lock, flags);
+		/*
+		 * free the frame is some other thread is not
+		 * pointing to it
+		 */
+		if (fnic->flogi_resp != fp)
+			free_fp = 0;
+		else
+			fnic->flogi_resp = NULL;
+
+		if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE)
+			fnic->state = FNIC_IN_ETH_MODE;
+		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+		if (free_fp)
+			dev_kfree_skb_irq(fp_skb(fp));
+	}
+
+ handle_flogi_resp_end:
+	return ret;
+}
+
+/* Returns 1 for a response that matches cached flogi oxid */
+static inline int is_matching_flogi_resp_frame(struct fnic *fnic,
+					       struct fc_frame *fp)
+{
+	struct fc_frame_header *fh;
+	int ret = 0;
+	u32 f_ctl;
+
+	fh = fc_frame_header_get(fp);
+	f_ctl = ntoh24(fh->fh_f_ctl);
+
+	if (fnic->flogi_oxid == ntohs(fh->fh_ox_id) &&
+	    fh->fh_r_ctl == FC_RCTL_ELS_REP &&
+	    (f_ctl & (FC_FC_EX_CTX | FC_FC_SEQ_CTX)) == FC_FC_EX_CTX &&
+	    fh->fh_type == FC_TYPE_ELS)
+		ret = 1;
+
+	return ret;
+}
+
+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;
+	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;
+
+	} 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;
+
+	} 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;
+	}
+
+	if (eth_hdrs_stripped)
+		fnic_import_rq_fc_frame(skb, fcp_bytes_written, sof, eof);
+	else if (fnic_import_rq_eth_pkt(skb, bytes_written))
+		goto drop;
+
+	fp = (struct fc_frame *)skb;
+
+	/*
+	 * If frame is an ELS response that matches the cached FLOGI OX_ID,
+	 * and is accept, issue flogi_reg_request copy wq request to firmware
+	 * to register the S_ID and determine whether FC_OUI mode or GW mode.
+	 */
+	if (is_matching_flogi_resp_frame(fnic, fp)) {
+		if (!eth_hdrs_stripped) {
+			if (fc_frame_payload_op(fp) == ELS_LS_ACC) {
+				fnic_handle_flogi_resp(fnic, fp);
+				return;
+			}
+			/*
+			 * Recd. Flogi reject. No point registering
+			 * with fw, but forward to libFC
+			 */
+			goto forward;
+		}
+		goto drop;
+	}
+	if (!eth_hdrs_stripped)
+		goto drop;
+
+forward:
+	spin_lock_irqsave(&fnic->fnic_lock, flags);
+	if (fnic->stop_rx_link_events) {
+		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+		goto drop;
+	}
+	/* Use fr_flags to indicate whether succ. flogi resp or not */
+	fr_flags(fp) = 0;
+	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;
+}
+
+static inline int is_flogi_frame(struct fc_frame_header *fh)
+{
+	return fh->fh_r_ctl == FC_RCTL_ELS_REQ && *(u8 *)(fh + 1) == ELS_FLOGI;
+}
+
+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 (!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 (is_flogi_frame(fh)) {
+		fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
+		memcpy(eth_hdr->h_source, fnic->mac_addr, ETH_ALEN);
+	} else {
+		if (fnic->fcoui_mode)
+			fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
+		else
+			memcpy(eth_hdr->h_dest, fnic->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);
+	struct fc_frame_header *fh;
+	int ret = 0;
+	enum fnic_state old_state;
+	unsigned long flags;
+	struct fc_frame *old_flogi = NULL;
+	struct fc_frame *old_flogi_resp = NULL;
+
+	if (fnic->in_remove) {
+		dev_kfree_skb(fp_skb(fp));
+		ret = -1;
+		goto fnic_send_end;
+	}
+
+	fh = fc_frame_header_get(fp);
+	/* if not an Flogi frame, send it out, this is the common case */
+	if (!is_flogi_frame(fh))
+		return fnic_send_frame(fnic, fp);
+
+	/* Flogi frame, now enter the state machine */
+
+	spin_lock_irqsave(&fnic->fnic_lock, flags);
+again:
+	/* Get any old cached frames, free them after dropping lock */
+	old_flogi = fnic->flogi;
+	fnic->flogi = NULL;
+	old_flogi_resp = fnic->flogi_resp;
+	fnic->flogi_resp = NULL;
+
+	fnic->flogi_oxid = FC_XID_UNKNOWN;
+
+	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;
+		vnic_dev_del_addr(fnic->vdev, fnic->data_src_addr);
+		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+		if (old_flogi) {
+			dev_kfree_skb(fp_skb(old_flogi));
+			old_flogi = NULL;
+		}
+		if (old_flogi_resp) {
+			dev_kfree_skb(fp_skb(old_flogi_resp));
+			old_flogi_resp = NULL;
+		}
+
+		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;
+			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+			dev_kfree_skb(fp_skb(fp));
+			goto fnic_send_end;
+		}
+		old_flogi = fnic->flogi;
+		fnic->flogi = fp;
+		fnic->flogi_oxid = ntohs(fh->fh_ox_id);
+		old_flogi_resp = fnic->flogi_resp;
+		fnic->flogi_resp = NULL;
+		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+		break;
+
+	case FNIC_IN_FC_TRANS_ETH_MODE:
+		/*
+		 * A reset is pending with the firmware. Store the flogi
+		 * and its oxid. The transition out of this state happens
+		 * only when Firmware completes the reset, either with
+		 * success or failed. If success, transition to
+		 * FNIC_IN_ETH_MODE, if fail, then transition to
+		 * FNIC_IN_FC_MODE
+		 */
+		fnic->flogi = fp;
+		fnic->flogi_oxid = ntohs(fh->fh_ox_id);
+		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+		break;
+
+	case FNIC_IN_ETH_MODE:
+		/*
+		 * The fw/hw is already in eth mode. Store the oxid,
+		 * and send the flogi frame out. The transition out of this
+		 * state happens only we receive flogi response from the
+		 * network, and the oxid matches the cached oxid when the
+		 * flogi frame was sent out. If they match, then we issue
+		 * a flogi_reg request and transition to state
+		 * FNIC_IN_ETH_TRANS_FC_MODE
+		 */
+		fnic->flogi_oxid = ntohs(fh->fh_ox_id);
+		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+		ret = fnic_send_frame(fnic, fp);
+		break;
+	}
+
+fnic_send_end:
+	if (old_flogi)
+		dev_kfree_skb(fp_skb(old_flogi));
+	if (old_flogi_resp)
+		dev_kfree_skb(fp_skb(old_flogi_resp));
+	return ret;
+}
+
+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;
+}