Fix oinkmaster patch.

[ipfire-2.x.git] / src / patches / suse-2.6.27.39 / patches.drivers / open-fcoe-driver

From: Hannes Reinecke <hare@suse.de>
Date: Wed, 17 Sep 2008 16:25:23 +0200
Subject: fcoe: Fibre Channel over Ethernet driver
References: FATE#303913

Encapsulation protocol for running Fibre Channel over Ethernet interfaces.
Creates virtual Fibre Channel host adapters using libfc.

Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: Steve Ma <steve.ma@intel.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
---
 drivers/scsi/Kconfig         |    6 +
 drivers/scsi/Makefile        |    1 +
 drivers/scsi/fcoe/Makefile   |    8 +
 drivers/scsi/fcoe/fcoe_def.h |  100 +++++++
 drivers/scsi/fcoe/fcoe_dev.c |  633 ++++++++++++++++++++++++++++++++++++++++++
 drivers/scsi/fcoe/fcoe_if.c  |  497 +++++++++++++++++++++++++++++++++
 drivers/scsi/fcoe/fcoeinit.c |  440 +++++++++++++++++++++++++++++
 7 files changed, 1685 insertions(+), 0 deletions(-)
 create mode 100644 drivers/scsi/fcoe/Makefile
 create mode 100644 drivers/scsi/fcoe/fcoe_def.h
 create mode 100644 drivers/scsi/fcoe/fcoe_dev.c
 create mode 100644 drivers/scsi/fcoe/fcoe_if.c
 create mode 100644 drivers/scsi/fcoe/fcoeinit.c

diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index bd480d2..f382eea 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -334,6 +334,12 @@ config LIBFC
 	---help---
 	  Fibre Channel library module
 
+config FCOE
+	tristate "FCoE module"
+	depends on LIBFC
+	---help---
+	  Fibre Channel over Ethernet module
+
 config ISCSI_TCP
 	tristate "iSCSI Initiator over TCP/IP"
 	depends on SCSI && INET
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
index 9158dc6..22c01e5 100644
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -37,6 +37,7 @@ obj-$(CONFIG_SCSI_SRP_ATTRS)	+= scsi_transport_srp.o
 obj-$(CONFIG_SCSI_DH)		+= device_handler/
 
 obj-$(CONFIG_LIBFC)		+= libfc/
+obj-$(CONFIG_FCOE) 		+= fcoe/
 obj-$(CONFIG_ISCSI_TCP) 	+= libiscsi.o	iscsi_tcp.o
 obj-$(CONFIG_INFINIBAND_ISER) 	+= libiscsi.o
 obj-$(CONFIG_SCSI_A4000T)	+= 53c700.o	a4000t.o
diff --git a/drivers/scsi/fcoe/Makefile b/drivers/scsi/fcoe/Makefile
new file mode 100644
index 0000000..342e2ad
--- /dev/null
+++ b/drivers/scsi/fcoe/Makefile
@@ -0,0 +1,8 @@
+# $Id: Makefile
+
+obj-$(CONFIG_FCOE) += fcoe.o
+
+fcoe-y := \
+	fcoe_dev.o \
+	fcoe_if.o \
+	fcoeinit.o
diff --git a/drivers/scsi/fcoe/fcoe_def.h b/drivers/scsi/fcoe/fcoe_def.h
new file mode 100644
index 0000000..12bf69c
--- /dev/null
+++ b/drivers/scsi/fcoe/fcoe_def.h
@@ -0,0 +1,100 @@
+/*
+ * Copyright(c) 2007 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Maintained at www.Open-FCoE.org
+ */
+
+#ifndef _FCOE_DEF_H_
+#define _FCOE_DEF_H_
+
+#include <linux/etherdevice.h>
+#include <linux/if_ether.h>
+
+#include <scsi/libfc/libfc.h>
+
+#include <scsi/fc/fc_fcoe.h>
+
+#define	FCOE_DRIVER_NAME    "fcoe"	/* driver name for ioctls */
+#define	FCOE_DRIVER_VENDOR  "Open-FC.org" /* vendor name for ioctls */
+
+#define FCOE_MIN_FRAME	36
+#define FCOE_WORD_TO_BYTE  4
+
+/*
+ * this is the main  common structure across all instance of fcoe driver.
+ * There is one to one mapping between hba struct and ethernet nic.
+ * list of hbas contains pointer to the hba struct, these structures are
+ * stored in this array using there corresponding if_index.
+ */
+
+struct fcoe_percpu_s {
+	int		cpu;
+	struct task_struct *thread;
+	struct sk_buff_head fcoe_rx_list;
+	struct page *crc_eof_page;
+	int crc_eof_offset;
+};
+
+struct fcoe_info {
+	struct timer_list timer;
+	/*
+	 * fcoe host list is protected by the following read/write lock
+	 */
+	rwlock_t fcoe_hostlist_lock;
+	struct list_head fcoe_hostlist;
+
+	struct fcoe_percpu_s *fcoe_percpu[NR_CPUS];
+};
+
+struct fcoe_softc {
+	struct list_head list;
+	struct fc_lport *lp;
+	struct net_device *real_dev;
+	struct net_device *phys_dev;		/* device with ethtool_ops */
+	struct packet_type  fcoe_packet_type;
+	struct sk_buff_head fcoe_pending_queue;
+	u16 user_mfs;			/* configured max frame size */
+
+	u8 dest_addr[ETH_ALEN];
+	u8 ctl_src_addr[ETH_ALEN];
+	u8 data_src_addr[ETH_ALEN];
+	/*
+	 * fcoe protocol address learning related stuff
+	 */
+	u16 flogi_oxid;
+	u8 flogi_progress;
+	u8 address_mode;
+};
+
+extern int debug_fcoe;
+extern struct fcoe_percpu_s *fcoe_percpu[];
+extern struct scsi_transport_template *fcoe_transport_template;
+int fcoe_percpu_receive_thread(void *arg);
+
+/*
+ * HBA transport ops prototypes
+ */
+extern struct fcoe_info fcoei;
+
+void fcoe_clean_pending_queue(struct fc_lport *fd);
+void fcoe_watchdog(ulong vp);
+int fcoe_destroy_interface(const char *ifname);
+int fcoe_create_interface(const char *ifname);
+int fcoe_xmit(struct fc_lport *, struct fc_frame *);
+int fcoe_rcv(struct sk_buff *, struct net_device *,
+	     struct packet_type *, struct net_device *);
+int fcoe_link_ok(struct fc_lport *);
+#endif /* _FCOE_DEF_H_ */
diff --git a/drivers/scsi/fcoe/fcoe_dev.c b/drivers/scsi/fcoe/fcoe_dev.c
new file mode 100644
index 0000000..d5a354f
--- /dev/null
+++ b/drivers/scsi/fcoe/fcoe_dev.c
@@ -0,0 +1,633 @@
+/*
+ * Copyright(c) 2007 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Maintained at www.Open-FCoE.org
+ */
+
+/*
+ * FCOE protocol file
+ */
+
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/kernel.h>
+#include <linux/spinlock.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/if_ether.h>
+#include <linux/kthread.h>
+#include <linux/crc32.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/scsicam.h>
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_transport_fc.h>
+#include <net/rtnetlink.h>
+
+#include <scsi/fc/fc_encaps.h>
+
+#include <scsi/libfc/libfc.h>
+#include <scsi/libfc/fc_frame.h>
+
+#include <scsi/fc/fc_fcoe.h>
+#include "fcoe_def.h"
+
+#define FCOE_MAX_QUEUE_DEPTH  256
+
+/* destination address mode */
+#define FCOE_GW_ADDR_MODE	    0x00
+#define FCOE_FCOUI_ADDR_MODE	    0x01
+
+/* Function Prototyes */
+static int fcoe_check_wait_queue(struct fc_lport *);
+static void fcoe_insert_wait_queue_head(struct fc_lport *, struct sk_buff *);
+static void fcoe_insert_wait_queue(struct fc_lport *, struct sk_buff *);
+static void fcoe_recv_flogi(struct fcoe_softc *, struct fc_frame *, u8 *);
+
+/*
+ * this is the fcoe receive function
+ * called by NET_RX_SOFTIRQ
+ * this function will receive the packet and
+ * build fc frame and pass it up
+ */
+int fcoe_rcv(struct sk_buff *skb, struct net_device *dev,
+	     struct packet_type *ptype, struct net_device *olddev)
+{
+	struct fc_lport *lp;
+	struct fcoe_rcv_info *fr;
+	struct fcoe_softc *fc;
+	struct fcoe_dev_stats *stats;
+	u8 *data;
+	struct fc_frame_header *fh;
+	unsigned short oxid;
+	int cpu_idx;
+	struct fcoe_percpu_s *fps;
+	struct fcoe_info *fci = &fcoei;
+
+	fc = container_of(ptype, struct fcoe_softc, fcoe_packet_type);
+	lp = fc->lp;
+	if (unlikely(lp == NULL)) {
+		FC_DBG("cannot find hba structure");
+		goto err2;
+	}
+
+	if (unlikely(debug_fcoe)) {
+		FC_DBG("skb_info: len:%d data_len:%d head:%p data:%p tail:%p "
+		       "end:%p sum:%d dev:%s", skb->len, skb->data_len,
+		       skb->head, skb->data, skb_tail_pointer(skb),
+		       skb_end_pointer(skb), skb->csum,
+		       skb->dev ? skb->dev->name : "<NULL>");
+
+	}
+
+	/* check for FCOE packet type */
+	if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) {
+		FC_DBG("wrong FC type frame");
+		goto err;
+	}
+	data = skb->data;
+	data += sizeof(struct fcoe_hdr);
+	fh = (struct fc_frame_header *)data;
+	oxid = ntohs(fh->fh_ox_id);
+
+	fr = fcoe_dev_from_skb(skb);
+	fr->fr_dev = lp;
+	fr->ptype = ptype;
+	cpu_idx = 0;
+#ifdef CONFIG_SMP
+	/*
+	 * The exchange ID are ANDed with num of online CPUs,
+	 * so that will have the least lock contention in
+	 * handling the exchange. if there is no thread
+	 * for a given idx then use first online cpu.
+	 */
+	cpu_idx = oxid & (num_online_cpus() >> 1);
+	if (fci->fcoe_percpu[cpu_idx] == NULL)
+		cpu_idx = first_cpu(cpu_online_map);
+#endif
+	fps = fci->fcoe_percpu[cpu_idx];
+
+	spin_lock_bh(&fps->fcoe_rx_list.lock);
+	__skb_queue_tail(&fps->fcoe_rx_list, skb);
+	if (fps->fcoe_rx_list.qlen == 1)
+		wake_up_process(fps->thread);
+
+	spin_unlock_bh(&fps->fcoe_rx_list.lock);
+
+	return 0;
+err:
+#ifdef CONFIG_SMP
+	stats = lp->dev_stats[smp_processor_id()];
+#else
+	stats = lp->dev_stats[0];
+#endif
+	stats->ErrorFrames++;
+
+err2:
+	kfree_skb(skb);
+	return -1;
+}
+
+static inline int fcoe_start_io(struct sk_buff *skb)
+{
+	int rc;
+
+	skb_get(skb);
+	rc = dev_queue_xmit(skb);
+	if (rc != 0)
+		return rc;
+	kfree_skb(skb);
+	return 0;
+}
+
+static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen)
+{
+	struct fcoe_info *fci = &fcoei;
+	struct fcoe_percpu_s *fps;
+	struct page *page;
+	int cpu_idx;
+
+	cpu_idx = get_cpu();
+	fps = fci->fcoe_percpu[cpu_idx];
+	page = fps->crc_eof_page;
+	if (!page) {
+		page = alloc_page(GFP_ATOMIC);
+		if (!page) {
+			put_cpu();
+			return -ENOMEM;
+		}
+		fps->crc_eof_page = page;
+		WARN_ON(fps->crc_eof_offset != 0);
+	}
+
+	get_page(page);
+	skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page,
+			   fps->crc_eof_offset, tlen);
+	skb->len += tlen;
+	skb->data_len += tlen;
+	skb->truesize += tlen;
+	fps->crc_eof_offset += sizeof(struct fcoe_crc_eof);
+
+	if (fps->crc_eof_offset >= PAGE_SIZE) {
+		fps->crc_eof_page = NULL;
+		fps->crc_eof_offset = 0;
+		put_page(page);
+	}
+	put_cpu();
+	return 0;
+}
+
+/*
+ * this is the frame xmit routine
+ */
+int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
+{
+	int indx;
+	int wlen, rc = 0;
+	u32 crc;
+	struct ethhdr *eh;
+	struct fcoe_crc_eof *cp;
+	struct sk_buff *skb;
+	struct fcoe_dev_stats *stats;
+	struct fc_frame_header *fh;
+	unsigned int hlen;		/* header length implies the version */
+	unsigned int tlen;		/* trailer length */
+	int flogi_in_progress = 0;
+	struct fcoe_softc *fc;
+	void *data;
+	u8 sof, eof;
+	struct fcoe_hdr *hp;
+
+	WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
+
+	fc = (struct fcoe_softc *)lp->drv_priv;
+	/*
+	 * if it is a flogi then we need to learn gw-addr
+	 * and my own fcid
+	 */
+	fh = fc_frame_header_get(fp);
+	if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {
+		if (fc_frame_payload_op(fp) == ELS_FLOGI) {
+			fc->flogi_oxid = ntohs(fh->fh_ox_id);
+			fc->address_mode = FCOE_FCOUI_ADDR_MODE;
+			fc->flogi_progress = 1;
+			flogi_in_progress = 1;
+		} else if (fc->flogi_progress && ntoh24(fh->fh_s_id) != 0) {
+			/*
+			 * Here we must've gotten an SID by accepting an FLOGI
+			 * from a point-to-point connection.  Switch to using
+			 * the source mac based on the SID.  The destination
+			 * MAC in this case would have been set by receving the
+			 * FLOGI.
+			 */
+			fc_fcoe_set_mac(fc->data_src_addr, fh->fh_s_id);
+			fc->flogi_progress = 0;
+		}
+	}
+
+	skb = fp_skb(fp);
+	sof = fr_sof(fp);
+	eof = fr_eof(fp);
+
+	crc = ~0;
+	crc = crc32(crc, skb->data, skb_headlen(skb));
+
+	for (indx = 0; indx < skb_shinfo(skb)->nr_frags; indx++) {
+		skb_frag_t *frag = &skb_shinfo(skb)->frags[indx];
+		unsigned long off = frag->page_offset;
+		unsigned long len = frag->size;
+
+		while (len > 0) {
+			unsigned long clen;
+
+			clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK));
+			data = kmap_atomic(frag->page + (off >> PAGE_SHIFT),
+					   KM_SKB_DATA_SOFTIRQ);
+			crc = crc32(crc, data + (off & ~PAGE_MASK),
+				    clen);
+			kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ);
+			off += clen;
+			len -= clen;
+		}
+	}
+
+	/*
+	 * Get header and trailer lengths.
+	 * This is temporary code until we get rid of the old protocol.
+	 * Both versions have essentially the same trailer layout but T11
+	 * has padding afterwards.
+	 */
+	hlen = sizeof(struct fcoe_hdr);
+	tlen = sizeof(struct fcoe_crc_eof);
+
+	/*
+	 * copy fc crc and eof to the skb buff
+	 * Use utility buffer in the fc_frame part of the sk_buff for the
+	 * trailer.
+	 * We don't do a get_page for this frag, since that page may not be
+	 * managed that way.  So that skb_free() doesn't do that either, we
+	 * setup the destructor to remove this frag.
+	 */
+	if (skb_is_nonlinear(skb)) {
+		skb_frag_t *frag;
+		if (fcoe_get_paged_crc_eof(skb, tlen)) {
+			kfree(skb);
+			return -ENOMEM;
+		}
+		frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
+		cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ)
+			+ frag->page_offset;
+	} else {
+		cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
+	}
+
+	cp->fcoe_eof = eof;
+	cp->fcoe_crc32 = cpu_to_le32(~crc);
+	if (tlen == sizeof(*cp))
+		memset(cp->fcoe_resvd, 0, sizeof(cp->fcoe_resvd));
+	wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
+
+	if (skb_is_nonlinear(skb)) {
+		kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ);
+		cp = NULL;
+	}
+
+	/*
+	 *	Fill in the control structures
+	 */
+	skb->ip_summed = CHECKSUM_NONE;
+	eh = (struct ethhdr *)skb_push(skb, hlen + sizeof(struct ethhdr));
+	if (fc->address_mode == FCOE_FCOUI_ADDR_MODE)
+		fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id);
+	else
+		/* insert GW address */
+		memcpy(eh->h_dest, fc->dest_addr, ETH_ALEN);
+
+	if (unlikely(flogi_in_progress))
+		memcpy(eh->h_source, fc->ctl_src_addr, ETH_ALEN);
+	else
+		memcpy(eh->h_source, fc->data_src_addr, ETH_ALEN);
+
+	eh->h_proto = htons(ETH_P_FCOE);
+	skb->protocol = htons(ETH_P_802_3);
+	skb_reset_mac_header(skb);
+	skb_reset_network_header(skb);
+
+	hp = (struct fcoe_hdr *)(eh + 1);
+	memset(hp, 0, sizeof(*hp));
+	if (FC_FCOE_VER)
+		FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
+	hp->fcoe_sof = sof;
+
+	stats = lp->dev_stats[smp_processor_id()];
+	stats->TxFrames++;
+	stats->TxWords += wlen;
+	skb->dev = fc->real_dev;
+
+	fr_dev(fp) = lp;
+	if (fc->fcoe_pending_queue.qlen)
+		rc = fcoe_check_wait_queue(lp);
+
+	if (rc == 0)
+		rc = fcoe_start_io(skb);
+
+	if (rc) {
+		fcoe_insert_wait_queue(lp, skb);
+		if (fc->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH)
+			fc_pause(lp);
+	}
+
+	return 0;
+}
+
+int fcoe_percpu_receive_thread(void *arg)
+{
+	struct fcoe_percpu_s *p = arg;
+	u32 fr_len;
+	unsigned int hlen;
+	unsigned int tlen;
+	struct fc_lport *lp;
+	struct fcoe_rcv_info *fr;
+	struct fcoe_dev_stats *stats;
+	struct fc_frame_header *fh;
+	struct sk_buff *skb;
+	struct fcoe_crc_eof *cp;
+	enum fc_sof sof;
+	struct fc_frame *fp;
+	u8 *mac = NULL;
+	struct fcoe_softc *fc;
+	struct fcoe_hdr *hp;
+
+	set_user_nice(current, 19);
+
+	while (!kthread_should_stop()) {
+
+		spin_lock_bh(&p->fcoe_rx_list.lock);
+		while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) {
+			set_current_state(TASK_INTERRUPTIBLE);
+			spin_unlock_bh(&p->fcoe_rx_list.lock);
+			schedule();
+			set_current_state(TASK_RUNNING);
+			if (kthread_should_stop())
+				return 0;
+			spin_lock_bh(&p->fcoe_rx_list.lock);
+		}
+		spin_unlock_bh(&p->fcoe_rx_list.lock);
+		fr = fcoe_dev_from_skb(skb);
+		lp = fr->fr_dev;
+		if (unlikely(lp == NULL)) {
+			FC_DBG("invalid HBA Structure");
+			kfree_skb(skb);
+			continue;
+		}
+
+		stats = lp->dev_stats[smp_processor_id()];
+
+		if (unlikely(debug_fcoe)) {
+			FC_DBG("skb_info: len:%d data_len:%d head:%p data:%p "
+			       "tail:%p end:%p sum:%d dev:%s",
+			       skb->len, skb->data_len,
+			       skb->head, skb->data, skb_tail_pointer(skb),
+			       skb_end_pointer(skb), skb->csum,
+			       skb->dev ? skb->dev->name : "<NULL>");
+		}
+
+		/*
+		 * Save source MAC address before discarding header.
+		 */
+		fc = lp->drv_priv;
+		if (unlikely(fc->flogi_progress))
+			mac = eth_hdr(skb)->h_source;
+
+		if (skb_is_nonlinear(skb))
+			skb_linearize(skb);	/* not ideal */
+
+		/*
+		 * Check the header and pull it off.
+		 */
+		hlen = sizeof(struct fcoe_hdr);
+
+		hp = (struct fcoe_hdr *)skb->data;
+		if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
+			if (stats->ErrorFrames < 5)
+				FC_DBG("unknown FCoE version %x",
+				       FC_FCOE_DECAPS_VER(hp));
+			stats->ErrorFrames++;
+			kfree_skb(skb);
+			continue;
+		}
+		sof = hp->fcoe_sof;
+		skb_pull(skb, sizeof(*hp));
+		fr_len = skb->len - sizeof(struct fcoe_crc_eof);
+		skb_trim(skb, fr_len);
+		tlen = sizeof(struct fcoe_crc_eof);
+
+		if (unlikely(fr_len > skb->len)) {
+			if (stats->ErrorFrames < 5)
+				FC_DBG("length error fr_len 0x%x skb->len 0x%x",
+				       fr_len, skb->len);
+			stats->ErrorFrames++;
+			kfree_skb(skb);
+			continue;
+		}
+		stats->RxFrames++;
+		stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
+
+		fp = (struct fc_frame *) skb;
+		fc_frame_init(fp);
+		cp = (struct fcoe_crc_eof *)(skb->data + fr_len);
+		fr_eof(fp) = cp->fcoe_eof;
+		fr_sof(fp) = sof;
+		fr_dev(fp) = lp;
+
+		/*
+		 * Check the CRC here, unless it's solicited data for SCSI.
+		 * In that case, the SCSI layer can check it during the copy,
+		 * and it'll be more cache-efficient.
+		 */
+		fh = fc_frame_header_get(fp);
+		if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
+		    fh->fh_type == FC_TYPE_FCP) {
+			fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
+			fc_exch_recv(lp, lp->emp, fp);
+		} else if (le32_to_cpu(cp->fcoe_crc32) ==
+			   ~crc32(~0, skb->data, fr_len)) {
+			if (unlikely(fc->flogi_progress))
+				fcoe_recv_flogi(fc, fp, mac);
+			fc_exch_recv(lp, lp->emp, fp);
+		} else {
+			if (debug_fcoe || stats->InvalidCRCCount < 5) {
+				printk(KERN_WARNING \
+				       "fcoe: dropping frame with CRC error");
+			}
+			stats->InvalidCRCCount++;
+			stats->ErrorFrames++;
+			fc_frame_free(fp);
+		}
+	}
+	return 0;
+}
+
+/*
+ * Snoop potential response to FLOGI or even incoming FLOGI.
+ */
+static void fcoe_recv_flogi(struct fcoe_softc *fc, struct fc_frame *fp, u8 *sa)
+{
+	struct fc_frame_header *fh;
+	u8 op;
+
+	fh = fc_frame_header_get(fp);
+	if (fh->fh_type != FC_TYPE_ELS)
+		return;
+	op = fc_frame_payload_op(fp);
+	if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP &&
+	    fc->flogi_oxid == ntohs(fh->fh_ox_id)) {
+		/*
+		 * FLOGI accepted.
+		 * If the src mac addr is FC_OUI-based, then we mark the
+		 * address_mode flag to use FC_OUI-based Ethernet DA.
+		 * Otherwise we use the FCoE gateway addr
+		 */
+		if (!compare_ether_addr(sa, (u8[6]) FC_FCOE_FLOGI_MAC)) {
+			fc->address_mode = FCOE_FCOUI_ADDR_MODE;
+		} else {
+			memcpy(fc->dest_addr, sa, ETH_ALEN);
+			fc->address_mode = FCOE_GW_ADDR_MODE;
+		}
+
+		/*
+		 * Remove any previously-set unicast MAC filter.
+		 * Add secondary FCoE MAC address filter for our OUI.
+		 */
+		rtnl_lock();
+		if (compare_ether_addr(fc->data_src_addr, (u8[6]) { 0 }))
+			dev_unicast_delete(fc->real_dev, fc->data_src_addr,
+					   ETH_ALEN);
+		fc_fcoe_set_mac(fc->data_src_addr, fh->fh_d_id);
+		dev_unicast_add(fc->real_dev, fc->data_src_addr, ETH_ALEN);
+		rtnl_unlock();
+
+		fc->flogi_progress = 0;
+	} else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) {
+		/*
+		 * Save source MAC for point-to-point responses.
+		 */
+		memcpy(fc->dest_addr, sa, ETH_ALEN);
+		fc->address_mode = FCOE_GW_ADDR_MODE;
+	}
+}
+
+void fcoe_watchdog(ulong vp)
+{
+	struct fc_lport *lp;
+	struct fcoe_softc *fc;
+	struct fcoe_info *fci = &fcoei;
+	int paused = 0;
+
+	read_lock(&fci->fcoe_hostlist_lock);
+	list_for_each_entry(fc, &fci->fcoe_hostlist, list) {
+		lp = fc->lp;
+		if (lp) {
+			if (fc->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH)
+				paused = 1;
+			if (fcoe_check_wait_queue(lp) <	 FCOE_MAX_QUEUE_DEPTH) {
+				if (paused)
+					fc_unpause(lp);
+			}
+		}
+	}
+	read_unlock(&fci->fcoe_hostlist_lock);
+
+	fci->timer.expires = jiffies + (1 * HZ);
+	add_timer(&fci->timer);
+}
+
+/*
+ * the wait_queue is used when the skb transmit fails. skb will go
+ * in the wait_queue which will be emptied by the time function OR
+ * by the next skb transmit.
+ *
+ */
+
+/*
+ * Function name : fcoe_check_wait_queue()
+ *
+ * Return Values : 0 or error
+ *
+ * Description	 : empties the wait_queue
+ *		   dequeue the head of the wait_queue queue and
+ *		   calls fcoe_start_io() for each packet
+ *		   if all skb have been transmitted, return 0
+ *		   if a error occurs, then restore wait_queue and try again
+ *		   later
+ *
+ */
+
+static int fcoe_check_wait_queue(struct fc_lport *lp)
+{
+	int rc, unpause = 0;
+	int paused = 0;
+	struct sk_buff *skb;
+	struct fcoe_softc *fc;
+
+	fc = (struct fcoe_softc *)lp->drv_priv;
+	spin_lock_bh(&fc->fcoe_pending_queue.lock);
+
+	/*
+	 * is this interface paused?
+	 */
+	if (fc->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH)
+		paused = 1;
+	if (fc->fcoe_pending_queue.qlen) {
+		while ((skb = __skb_dequeue(&fc->fcoe_pending_queue)) != NULL) {
+			spin_unlock_bh(&fc->fcoe_pending_queue.lock);
+			rc = fcoe_start_io(skb);
+			if (rc) {
+				fcoe_insert_wait_queue_head(lp, skb);
+				return rc;
+			}
+			spin_lock_bh(&fc->fcoe_pending_queue.lock);
+		}
+		if (fc->fcoe_pending_queue.qlen < FCOE_MAX_QUEUE_DEPTH)
+			unpause = 1;
+	}
+	spin_unlock_bh(&fc->fcoe_pending_queue.lock);
+	if ((unpause) && (paused))
+		fc_unpause(lp);
+	return fc->fcoe_pending_queue.qlen;
+}
+
+static void fcoe_insert_wait_queue_head(struct fc_lport *lp,
+					struct sk_buff *skb)
+{
+	struct fcoe_softc *fc;
+
+	fc = (struct fcoe_softc *)lp->drv_priv;
+	spin_lock_bh(&fc->fcoe_pending_queue.lock);
+	__skb_queue_head(&fc->fcoe_pending_queue, skb);
+	spin_unlock_bh(&fc->fcoe_pending_queue.lock);
+}
+
+static void fcoe_insert_wait_queue(struct fc_lport *lp,
+				   struct sk_buff *skb)
+{
+	struct fcoe_softc *fc;
+
+	fc = (struct fcoe_softc *)lp->drv_priv;
+	spin_lock_bh(&fc->fcoe_pending_queue.lock);
+	__skb_queue_tail(&fc->fcoe_pending_queue, skb);
+	spin_unlock_bh(&fc->fcoe_pending_queue.lock);
+}
diff --git a/drivers/scsi/fcoe/fcoe_if.c b/drivers/scsi/fcoe/fcoe_if.c
new file mode 100644
index 0000000..7f983e2
--- /dev/null
+++ b/drivers/scsi/fcoe/fcoe_if.c
@@ -0,0 +1,497 @@
+/*
+ * Copyright(c) 2007 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Maintained at www.Open-FCoE.org
+ */
+
+/*
+ * FCOE protocol file
+ */
+
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <net/rtnetlink.h>
+
+#include <scsi/fc/fc_els.h>
+#include <scsi/fc/fc_encaps.h>
+#include <scsi/fc/fc_fs.h>
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_transport_fc.h>
+
+#include <scsi/libfc/libfc.h>
+
+#include <scsi/fc/fc_fcoe.h>
+#include "fcoe_def.h"
+
+#define FCOE_VERSION "0.1"
+
+#define FCOE_MAX_LUN        255
+#define FCOE_MAX_FCP_TARGET 256
+
+#define FCOE_MIN_XID		    0x0004
+#define FCOE_MAX_XID		    0x07ef
+
+int debug_fcoe;
+
+struct fcoe_info fcoei = {
+	.fcoe_hostlist = LIST_HEAD_INIT(fcoei.fcoe_hostlist),
+};
+
+static struct fcoe_softc *fcoe_find_fc_lport(const char *name)
+{
+	struct fcoe_softc *fc;
+	struct fc_lport *lp;
+	struct fcoe_info *fci = &fcoei;
+
+	read_lock(&fci->fcoe_hostlist_lock);
+	list_for_each_entry(fc, &fci->fcoe_hostlist, list) {
+		lp = fc->lp;
+		if (!strncmp(name, lp->ifname, IFNAMSIZ)) {
+			read_unlock(&fci->fcoe_hostlist_lock);
+			return fc;
+		}
+	}
+	read_unlock(&fci->fcoe_hostlist_lock);
+	return NULL;
+}
+
+/*
+ * Convert 48-bit IEEE MAC address to 64-bit FC WWN.
+ */
+static u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN],
+			     unsigned int scheme, unsigned int port)
+{
+	u64 wwn;
+	u64 host_mac;
+
+	/* The MAC is in NO, so flip only the low 48 bits */
+	host_mac = ((u64) mac[0] << 40) |
+		((u64) mac[1] << 32) |
+		((u64) mac[2] << 24) |
+		((u64) mac[3] << 16) |
+		((u64) mac[4] << 8) |
+		(u64) mac[5];
+
+	WARN_ON(host_mac >= (1ULL << 48));
+	wwn = host_mac | ((u64) scheme << 60);
+	switch (scheme) {
+	case 1:
+		WARN_ON(port != 0);
+		break;
+	case 2:
+		WARN_ON(port >= 0xfff);
+		wwn |= (u64) port << 48;
+		break;
+	default:
+		WARN_ON(1);
+		break;
+	}
+
+	return wwn;
+}
+
+static struct scsi_host_template fcoe_driver_template = {
+	.module = THIS_MODULE,
+	.name = "FCoE Driver",
+	.proc_name = FCOE_DRIVER_NAME,
+	.queuecommand = fc_queuecommand,
+	.eh_abort_handler = fc_eh_abort,
+	.eh_device_reset_handler = fc_eh_device_reset,
+	.eh_host_reset_handler = fc_eh_host_reset,
+	.slave_alloc = fc_slave_alloc,
+	.change_queue_depth = fc_change_queue_depth,
+	.change_queue_type = fc_change_queue_type,
+	.this_id = -1,
+	.cmd_per_lun = 32,
+	.can_queue = FC_MAX_OUTSTANDING_COMMANDS,
+	.use_clustering = ENABLE_CLUSTERING,
+	.sg_tablesize = 4,
+	.max_sectors = 0xffff,
+};
+
+int fcoe_destroy_interface(const char *ifname)
+{
+	int cpu, idx;
+	struct fcoe_dev_stats *p;
+	struct fcoe_percpu_s *pp;
+	struct fcoe_softc *fc;
+	struct fcoe_rcv_info *fr;
+	struct fcoe_info *fci = &fcoei;
+	struct sk_buff_head *list;
+	struct sk_buff *skb, *next;
+	struct sk_buff *head;
+	struct fc_lport *lp;
+	u8 flogi_maddr[ETH_ALEN];
+
+	fc = fcoe_find_fc_lport(ifname);
+	if (!fc)
+		return -ENODEV;
+
+	lp = fc->lp;
+
+	/* Remove the instance from fcoe's list */
+	write_lock_bh(&fci->fcoe_hostlist_lock);
+	list_del(&fc->list);
+	write_unlock_bh(&fci->fcoe_hostlist_lock);
+
+	/* Cleanup the fc_lport */
+	fc_lport_destroy(lp);
+	fc_fcp_destroy(lp);
+	if (lp->emp)
+		fc_exch_mgr_free(lp->emp);
+
+	/* Detach from the scsi-ml */
+	fc_remove_host(lp->host);
+	scsi_remove_host(lp->host);
+
+	/* Don't listen for Ethernet packets anymore */
+	dev_remove_pack(&fc->fcoe_packet_type);
+
+	/* Delete secondary MAC addresses */
+	rtnl_lock();
+	memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
+	dev_unicast_delete(fc->real_dev, flogi_maddr, ETH_ALEN);
+	if (compare_ether_addr(fc->data_src_addr, (u8[6]) { 0 }))
+		dev_unicast_delete(fc->real_dev, fc->data_src_addr, ETH_ALEN);
+	rtnl_unlock();
+
+	/* Free the per-CPU revieve threads */
+	for (idx = 0; idx < NR_CPUS; idx++) {
+		if (fci->fcoe_percpu[idx]) {
+			pp = fci->fcoe_percpu[idx];
+			spin_lock_bh(&pp->fcoe_rx_list.lock);
+			list = &pp->fcoe_rx_list;
+			head = list->next;
+			for (skb = head; skb != (struct sk_buff *)list;
+			     skb = next) {
+				next = skb->next;
+				fr = fcoe_dev_from_skb(skb);
+				if (fr->fr_dev == fc->lp) {
+					__skb_unlink(skb, list);
+					kfree_skb(skb);
+				}
+			}
+			spin_unlock_bh(&pp->fcoe_rx_list.lock);
+		}
+	}
+
+	/* Free existing skbs */
+	fcoe_clean_pending_queue(lp);
+
+	/* Free memory used by statistical counters */
+	for_each_online_cpu(cpu) {
+		p = lp->dev_stats[cpu];
+		if (p) {
+			lp->dev_stats[cpu] = NULL;
+			kfree(p);
+		}
+	}
+
+	/* Release the net_device and Scsi_Host */
+	dev_put(fc->real_dev);
+	scsi_host_put(lp->host);
+	return 0;
+}
+
+/*
+ * Return zero if link is OK for use by FCoE.
+ * Any permanently-disqualifying conditions have been previously checked.
+ * This also updates the speed setting, which may change with link for 100/1000.
+ *
+ * This function should probably be checking for PAUSE support at some point
+ * in the future. Currently Per-priority-pause is not determinable using
+ * ethtool, so we shouldn't be restrictive until that problem is resolved.
+ */
+int fcoe_link_ok(struct fc_lport *lp)
+{
+	struct fcoe_softc *fc = (struct fcoe_softc *)lp->drv_priv;
+	struct net_device *dev = fc->real_dev;
+	struct ethtool_cmd ecmd = { ETHTOOL_GSET };
+	int rc = 0;
+
+	if ((dev->flags & IFF_UP) && netif_carrier_ok(dev)) {
+		dev = fc->phys_dev;
+		if (dev->ethtool_ops->get_settings) {
+			dev->ethtool_ops->get_settings(dev, &ecmd);
+			lp->link_supported_speeds &=
+				~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
+			if (ecmd.supported & (SUPPORTED_1000baseT_Half |
+					      SUPPORTED_1000baseT_Full))
+				lp->link_supported_speeds |= FC_PORTSPEED_1GBIT;
+			if (ecmd.supported & SUPPORTED_10000baseT_Full)
+				lp->link_supported_speeds |=
+					FC_PORTSPEED_10GBIT;
+			if (ecmd.speed == SPEED_1000)
+				lp->link_speed = FC_PORTSPEED_1GBIT;
+			if (ecmd.speed == SPEED_10000)
+				lp->link_speed = FC_PORTSPEED_10GBIT;
+		}
+	} else
+		rc = -1;
+
+	return rc;
+}
+
+static struct libfc_function_template fcoe_libfc_fcn_templ = {
+	.frame_send = fcoe_xmit,
+};
+
+static int lport_config(struct fc_lport *lp, struct Scsi_Host *shost)
+{
+	int i = 0;
+	struct fcoe_dev_stats *p;
+
+	lp->host = shost;
+	lp->drv_priv = (void *)(lp + 1);
+
+	lp->emp = fc_exch_mgr_alloc(lp, FC_CLASS_3,
+				    FCOE_MIN_XID, FCOE_MAX_XID);
+	if (!lp->emp)
+		return -ENOMEM;
+
+	lp->link_status = 0;
+	lp->max_retry_count = 3;
+	lp->e_d_tov = 2 * 1000;	/* FC-FS default */
+	lp->r_a_tov = 2 * 2 * 1000;
+	lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
+			      FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
+
+	/*
+	 * allocate per cpu stats block
+	 */
+	for_each_online_cpu(i) {
+		p = kzalloc(sizeof(struct fcoe_dev_stats), GFP_KERNEL);
+		if (p)
+			lp->dev_stats[i] = p;
+	}
+
+	/* Finish fc_lport configuration */
+	fc_lport_config(lp);
+
+	return 0;
+}
+
+static int net_config(struct fc_lport *lp)
+{
+	u32 mfs;
+	u64 wwnn, wwpn;
+	struct net_device *net_dev;
+	struct fcoe_softc *fc = (struct fcoe_softc *)lp->drv_priv;
+	u8 flogi_maddr[ETH_ALEN];
+
+	/* Require support for get_pauseparam ethtool op. */
+	net_dev = fc->real_dev;
+	if (!net_dev->ethtool_ops && (net_dev->priv_flags & IFF_802_1Q_VLAN))
+		net_dev = vlan_dev_real_dev(net_dev);
+	if (!net_dev->ethtool_ops || !net_dev->ethtool_ops->get_pauseparam)
+		return -EOPNOTSUPP;
+
+	fc->phys_dev = net_dev;
+
+	/* Do not support for bonding device */
+	if ((fc->real_dev->priv_flags & IFF_MASTER_ALB) ||
+	    (fc->real_dev->priv_flags & IFF_SLAVE_INACTIVE) ||
+	    (fc->real_dev->priv_flags & IFF_MASTER_8023AD)) {
+		return -EOPNOTSUPP;
+	}
+
+	/*
+	 * Determine max frame size based on underlying device and optional
+	 * user-configured limit.  If the MFS is too low, fcoe_link_ok()
+	 * will return 0, so do this first.
+	 */
+	mfs = fc->real_dev->mtu - (sizeof(struct fcoe_hdr) +
+				   sizeof(struct fcoe_crc_eof));
+	fc_set_mfs(lp, mfs);
+
+	lp->link_status = ~FC_PAUSE & ~FC_LINK_UP;
+	if (!fcoe_link_ok(lp))
+		lp->link_status |= FC_LINK_UP;
+
+	if (fc->real_dev->features & NETIF_F_SG)
+		lp->capabilities = TRANS_C_SG;
+
+
+	skb_queue_head_init(&fc->fcoe_pending_queue);
+
+	memcpy(lp->ifname, fc->real_dev->name, IFNAMSIZ);
+
+	/* setup Source Mac Address */
+	memcpy(fc->ctl_src_addr, fc->real_dev->dev_addr,
+	       fc->real_dev->addr_len);
+
+	wwnn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 1, 0);
+	fc_set_wwnn(lp, wwnn);
+	/* XXX - 3rd arg needs to be vlan id */
+	wwpn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 2, 0);
+	fc_set_wwpn(lp, wwpn);
+
+	/*
+	 * Add FCoE MAC address as second unicast MAC address
+	 * or enter promiscuous mode if not capable of listening
+	 * for multiple unicast MACs.
+	 */
+	rtnl_lock();
+	memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
+	dev_unicast_add(fc->real_dev, flogi_maddr, ETH_ALEN);
+	rtnl_unlock();
+
+	/*
+	 * setup the receive function from ethernet driver
+	 * on the ethertype for the given device
+	 */
+	fc->fcoe_packet_type.func = fcoe_rcv;
+	fc->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
+	fc->fcoe_packet_type.dev = fc->real_dev;
+	dev_add_pack(&fc->fcoe_packet_type);
+
+	return 0;
+}
+
+static void shost_config(struct fc_lport *lp)
+{
+	lp->host->max_lun = FCOE_MAX_LUN;
+	lp->host->max_id = FCOE_MAX_FCP_TARGET;
+	lp->host->max_channel = 0;
+	lp->host->transportt = fcoe_transport_template;
+}
+
+static int libfc_config(struct fc_lport *lp)
+{
+	/* Set the function pointers set by the LLDD */
+	memcpy(&lp->tt, &fcoe_libfc_fcn_templ,
+	       sizeof(struct libfc_function_template));
+
+	if (fc_fcp_init(lp))
+		return -ENOMEM;
+	fc_exch_init(lp);
+	fc_lport_init(lp);
+	fc_rport_init(lp);
+	fc_ns_init(lp);
+	fc_attr_init(lp);
+
+	return 0;
+}
+
+/*
+ * This function creates the fcoe interface
+ * create struct fcdev which is a shared structure between opefc
+ * and transport level protocol.
+ */
+int fcoe_create_interface(const char *ifname)
+{
+	struct fc_lport *lp = NULL;
+	struct fcoe_softc *fc;
+	struct net_device *net_dev;
+	struct Scsi_Host *shost;
+	struct fcoe_info *fci = &fcoei;
+	int rc = 0;
+
+	net_dev = dev_get_by_name(&init_net, ifname);
+	if (net_dev == NULL) {
+		FC_DBG("could not get network device for %s",
+		       ifname);
+		return -ENODEV;
+	}
+
+	if (fcoe_find_fc_lport(net_dev->name) != NULL) {
+		rc = -EEXIST;
+		goto out_put_dev;
+	}
+
+	shost = scsi_host_alloc(&fcoe_driver_template,
+				sizeof(struct fc_lport) +
+				sizeof(struct fcoe_softc));
+
+	if (!shost) {
+		FC_DBG("Could not allocate host structure\n");
+		rc = -ENOMEM;
+		goto out_put_dev;
+	}
+
+	lp = shost_priv(shost);
+	rc = lport_config(lp, shost);
+	if (rc)
+		goto out_host_put;
+
+	/* Configure the fcoe_softc */
+	fc = (struct fcoe_softc *)lp->drv_priv;
+	fc->lp = lp;
+	fc->real_dev = net_dev;
+	shost_config(lp);
+
+
+	/* Add the new host to the SCSI-ml */
+	rc = scsi_add_host(lp->host, NULL);
+	if (rc) {
+		FC_DBG("error on scsi_add_host\n");
+		goto out_lp_destroy;
+	}
+
+	sprintf(fc_host_symbolic_name(lp->host), "%s v%s over %s",
+		FCOE_DRIVER_NAME, FCOE_VERSION,
+		ifname);
+
+	/* Configure netdev and networking properties of the lp */
+	rc = net_config(lp);
+	if (rc)
+		goto out_lp_destroy;
+
+	/* Initialize the library */
+	rc = libfc_config(lp);
+	if (rc)
+		goto out_lp_destroy;
+
+	write_lock_bh(&fci->fcoe_hostlist_lock);
+	list_add_tail(&fc->list, &fci->fcoe_hostlist);
+	write_unlock_bh(&fci->fcoe_hostlist_lock);
+
+	lp->boot_time = jiffies;
+
+	fc_fabric_login(lp);
+
+	return rc;
+
+out_lp_destroy:
+	fc_exch_mgr_free(lp->emp); /* Free the EM */
+out_host_put:
+	scsi_host_put(lp->host);
+out_put_dev:
+	dev_put(net_dev);
+	return rc;
+}
+
+void fcoe_clean_pending_queue(struct fc_lport *lp)
+{
+	struct fcoe_softc  *fc = lp->drv_priv;
+	struct sk_buff *skb;
+
+	spin_lock_bh(&fc->fcoe_pending_queue.lock);
+	while ((skb = __skb_dequeue(&fc->fcoe_pending_queue)) != NULL) {
+		spin_unlock_bh(&fc->fcoe_pending_queue.lock);
+		kfree_skb(skb);
+		spin_lock_bh(&fc->fcoe_pending_queue.lock);
+	}
+	spin_unlock_bh(&fc->fcoe_pending_queue.lock);
+}
diff --git a/drivers/scsi/fcoe/fcoeinit.c b/drivers/scsi/fcoe/fcoeinit.c
new file mode 100644
index 0000000..e069835
--- /dev/null
+++ b/drivers/scsi/fcoe/fcoeinit.c
@@ -0,0 +1,440 @@
+/*
+ * Copyright(c) 2007 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Maintained at www.Open-FCoE.org
+ */
+
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/kernel.h>
+#include <linux/kthread.h>
+#include <linux/spinlock.h>
+#include <linux/cpu.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/if_ether.h>
+#include <linux/fs.h>
+#include <linux/sysfs.h>
+#include <linux/ctype.h>
+
+#include <scsi/libfc/libfc.h>
+
+#include "fcoe_def.h"
+
+MODULE_AUTHOR("Open-FCoE.org");
+MODULE_DESCRIPTION("FCoE");
+MODULE_LICENSE("GPL");
+
+/*
+ * Static functions and variables definations
+ */
+#ifdef CONFIG_HOTPLUG_CPU
+static int fcoe_cpu_callback(struct notifier_block *, ulong, void *);
+#endif /* CONFIG_HOTPLUG_CPU */
+static int fcoe_device_notification(struct notifier_block *, ulong, void *);
+static void fcoe_dev_setup(void);
+static void fcoe_dev_cleanup(void);
+
+struct scsi_transport_template *fcoe_transport_template;
+
+static int fcoe_reset(struct Scsi_Host *shost)
+{
+	struct fc_lport *lp = shost_priv(shost);
+	fc_lport_enter_reset(lp);
+	return 0;
+}
+
+struct fc_function_template fcoe_transport_function = {
+	.show_host_node_name = 1,
+	.show_host_port_name = 1,
+	.show_host_supported_classes = 1,
+	.show_host_supported_fc4s = 1,
+	.show_host_active_fc4s = 1,
+	.show_host_maxframe_size = 1,
+
+	.get_host_port_id = fc_get_host_port_id,
+	.show_host_port_id = 1,
+	.get_host_speed = fc_get_host_speed,
+	.show_host_speed = 1,
+	.get_host_port_type = fc_get_host_port_type,
+	.show_host_port_type = 1,
+	.get_host_port_state = fc_get_host_port_state,
+	.show_host_port_state = 1,
+	.show_host_symbolic_name = 1,
+
+	.dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
+	.show_rport_maxframe_size = 1,
+	.show_rport_supported_classes = 1,
+
+	.get_host_fabric_name = fc_get_host_fabric_name,
+	.show_host_fabric_name = 1,
+	.show_starget_node_name = 1,
+	.show_starget_port_name = 1,
+	.show_starget_port_id = 1,
+	.set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
+	.show_rport_dev_loss_tmo = 1,
+	.get_fc_host_stats = fc_get_host_stats,
+	.issue_fc_host_lip = fcoe_reset,
+};
+
+struct fcoe_percpu_s *fcoe_percpu[NR_CPUS];
+
+#ifdef CONFIG_HOTPLUG_CPU
+static struct notifier_block fcoe_cpu_notifier = {
+	.notifier_call = fcoe_cpu_callback,
+};
+#endif /* CONFIG_HOTPLUG_CPU */
+
+/*
+ * notification function from net device
+ */
+static struct notifier_block fcoe_notifier = {
+	.notifier_call = fcoe_device_notification,
+};
+
+#ifdef CONFIG_HOTPLUG_CPU
+/*
+ * create percpu stats block
+ * called by cpu add/remove notifier
+ */
+static void fcoe_create_percpu_data(int cpu)
+{
+	struct fc_lport *lp;
+	struct fcoe_softc *fc;
+	struct fcoe_dev_stats *p;
+	struct fcoe_info *fci = &fcoei;
+
+	write_lock_bh(&fci->fcoe_hostlist_lock);
+	list_for_each_entry(fc, &fci->fcoe_hostlist, list) {
+		lp = fc->lp;
+		if (lp->dev_stats[cpu] == NULL) {
+			p = kzalloc(sizeof(struct fcoe_dev_stats), GFP_KERNEL);
+			if (p)
+				lp->dev_stats[cpu] = p;
+		}
+	}
+	write_unlock_bh(&fci->fcoe_hostlist_lock);
+}
+
+/*
+ * destroy percpu stats block
+ * called by cpu add/remove notifier
+ */
+static void fcoe_destroy_percpu_data(int cpu)
+{
+	struct fcoe_dev_stats *p;
+	struct fc_lport *lp;
+	struct fcoe_softc *fc;
+	struct fcoe_info *fci = &fcoei;
+
+	write_lock_bh(&fci->fcoe_hostlist_lock);
+	list_for_each_entry(fc, &fci->fcoe_hostlist, list) {
+		lp = fc->lp;
+		p = lp->dev_stats[cpu];
+		if (p != NULL) {
+			lp->dev_stats[cpu] = NULL;
+			kfree(p);
+		}
+	}
+	write_unlock_bh(&fci->fcoe_hostlist_lock);
+}
+
+/*
+ * Get notified when a cpu comes on/off. Be hotplug friendly.
+ */
+static int fcoe_cpu_callback(struct notifier_block *nfb, unsigned long action,
+			     void *hcpu)
+{
+	unsigned int cpu = (unsigned long)hcpu;
+
+	switch (action) {
+	case CPU_ONLINE:
+		fcoe_create_percpu_data(cpu);
+		break;
+	case CPU_DEAD:
+		fcoe_destroy_percpu_data(cpu);
+		break;
+	default:
+		break;
+	}
+	return NOTIFY_OK;
+}
+#endif /* CONFIG_HOTPLUG_CPU */
+
+/*
+ * function to setup link change notification interface
+ */
+static void fcoe_dev_setup(void)
+{
+	/*
+	 * here setup a interface specific wd time to
+	 * monitor the link state
+	 */
+	register_netdevice_notifier(&fcoe_notifier);
+}
+
+/*
+ * function to cleanup link change notification interface
+ */
+static void fcoe_dev_cleanup(void)
+{
+	unregister_netdevice_notifier(&fcoe_notifier);
+}
+
+/*
+ * This function is called by the ethernet driver
+ * this is called in case of link change event
+ */
+static int fcoe_device_notification(struct notifier_block *notifier,
+				    ulong event, void *ptr)
+{
+	struct fc_lport *lp = NULL;
+	struct net_device *real_dev = ptr;
+	struct fcoe_softc *fc;
+	struct fcoe_dev_stats *stats;
+	struct fcoe_info *fci = &fcoei;
+	u16 new_status;
+	u32 mfs;
+	int rc = NOTIFY_OK;
+
+	read_lock(&fci->fcoe_hostlist_lock);
+	list_for_each_entry(fc, &fci->fcoe_hostlist, list) {
+		if (fc->real_dev == real_dev) {
+			lp = fc->lp;
+			break;
+		}
+	}
+	read_unlock(&fci->fcoe_hostlist_lock);
+	if (lp == NULL) {
+		rc = NOTIFY_DONE;
+		goto out;
+	}
+
+	new_status = lp->link_status;
+	switch (event) {
+	case NETDEV_DOWN:
+	case NETDEV_GOING_DOWN:
+		new_status &= ~FC_LINK_UP;
+		break;
+	case NETDEV_UP:
+	case NETDEV_CHANGE:
+		new_status &= ~FC_LINK_UP;
+		if (!fcoe_link_ok(lp))
+			new_status |= FC_LINK_UP;
+		break;
+	case NETDEV_CHANGEMTU:
+		mfs = fc->real_dev->mtu -
+			(sizeof(struct fcoe_hdr) +
+			 sizeof(struct fcoe_crc_eof));
+		if (fc->user_mfs && fc->user_mfs < mfs)
+			mfs = fc->user_mfs;
+		if (mfs >= FC_MIN_MAX_FRAME)
+			fc_set_mfs(lp, mfs);
+		new_status &= ~FC_LINK_UP;
+		if (!fcoe_link_ok(lp))
+			new_status |= FC_LINK_UP;
+		break;
+	case NETDEV_REGISTER:
+		break;
+	default:
+		FC_DBG("unknown event %ld call", event);
+	}
+	if (lp->link_status != new_status) {
+		if ((new_status & FC_LINK_UP) == FC_LINK_UP)
+			fc_linkup(lp);
+		else {
+			stats = lp->dev_stats[smp_processor_id()];
+			stats->LinkFailureCount++;
+			fc_linkdown(lp);
+			fcoe_clean_pending_queue(lp);
+		}
+	}
+out:
+	return rc;
+}
+
+static void trimstr(char *str, int len)
+{
+	char *cp = str + len;
+	while (--cp >= str && *cp == '\n')
+		*cp = '\0';
+}
+
+static ssize_t fcoe_destroy(struct kobject *kobj, struct kobj_attribute *attr,
+			    const char *buffer, size_t size)
+{
+	char ifname[40];
+	strcpy(ifname, buffer);
+	trimstr(ifname, strlen(ifname));
+	fcoe_destroy_interface(ifname);
+	return size;
+}
+
+static ssize_t fcoe_create(struct kobject *kobj, struct kobj_attribute *attr,
+			   const char *buffer, size_t size)
+{
+	char ifname[40];
+	strcpy(ifname, buffer);
+	trimstr(ifname, strlen(ifname));
+	fcoe_create_interface(ifname);
+	return size;
+}
+
+static const struct kobj_attribute fcoe_destroyattr = \
+	__ATTR(destroy, S_IWUSR, NULL, fcoe_destroy);
+static const struct kobj_attribute fcoe_createattr = \
+	__ATTR(create, S_IWUSR, NULL, fcoe_create);
+
+/*
+ * Initialization routine
+ * 1. Will create fc transport software structure
+ * 2. initialize the link list of port information structure
+ */
+static int __init fcoeinit(void)
+{
+	int rc = 0;
+	int cpu;
+	struct fcoe_percpu_s *p;
+	struct fcoe_info *fci = &fcoei;
+
+	rc = sysfs_create_file(&THIS_MODULE->mkobj.kobj,
+			       &fcoe_destroyattr.attr);
+	if (!rc)
+		rc = sysfs_create_file(&THIS_MODULE->mkobj.kobj,
+				       &fcoe_createattr.attr);
+
+	if (rc)
+		return rc;
+
+	rwlock_init(&fci->fcoe_hostlist_lock);
+
+#ifdef CONFIG_HOTPLUG_CPU
+	register_cpu_notifier(&fcoe_cpu_notifier);
+#endif /* CONFIG_HOTPLUG_CPU */
+
+	/*
+	 * initialize per CPU interrupt thread
+	 */
+	for_each_online_cpu(cpu) {
+		p = kzalloc(sizeof(struct fcoe_percpu_s), GFP_KERNEL);
+		if (p) {
+			p->thread = kthread_create(fcoe_percpu_receive_thread,
+						   (void *)p,
+						   "fcoethread/%d", cpu);
+
+			/*
+			 * if there is no error then bind the thread to the cpu
+			 * initialize the semaphore and skb queue head
+			 */
+			if (likely(!IS_ERR(p->thread))) {
+				p->cpu = cpu;
+				fci->fcoe_percpu[cpu] = p;
+				skb_queue_head_init(&p->fcoe_rx_list);
+				kthread_bind(p->thread, cpu);
+				wake_up_process(p->thread);
+			} else {
+				fci->fcoe_percpu[cpu] = NULL;
+				kfree(p);
+
+			}
+		}
+	}
+	if (rc < 0) {
+		FC_DBG("failed to initialize proc intrerface\n");
+		rc = -ENODEV;
+		goto out_chrdev;
+	}
+
+	/*
+	 * setup link change notification
+	 */
+	fcoe_dev_setup();
+
+	init_timer(&fci->timer);
+	fci->timer.data = (ulong) fci;
+	fci->timer.function = fcoe_watchdog;
+	fci->timer.expires = (jiffies + (10 * HZ));
+	add_timer(&fci->timer);
+
+	fcoe_transport_template =
+		fc_attach_transport(&fcoe_transport_function);
+
+	if (fcoe_transport_template == NULL) {
+		FC_DBG("fail to attach fc transport");
+		return -1;
+	}
+
+	return 0;
+
+out_chrdev:
+#ifdef CONFIG_HOTPLUG_CPU
+	unregister_cpu_notifier(&fcoe_cpu_notifier);
+#endif /* CONFIG_HOTPLUG_CPU */
+	return rc;
+}
+
+static void __exit fcoe_exit(void)
+{
+	u32 idx;
+	struct fcoe_softc *fc, *tmp;
+	struct fc_lport *lp;
+	struct fcoe_info *fci = &fcoei;
+	struct fcoe_percpu_s *p;
+	struct sk_buff *skb;
+
+	/*
+	 * Stop all call back interfaces
+	 */
+#ifdef CONFIG_HOTPLUG_CPU
+	unregister_cpu_notifier(&fcoe_cpu_notifier);
+#endif /* CONFIG_HOTPLUG_CPU */
+	fcoe_dev_cleanup();
+
+	/*
+	 * stop timer
+	 */
+	del_timer_sync(&fci->timer);
+
+	/*
+	 * assuming that at this time there will be no
+	 * ioctl in prograss, therefore we do not need to lock the
+	 * list.
+	 */
+	list_for_each_entry_safe(fc, tmp, &fci->fcoe_hostlist, list) {
+		lp = fc->lp;
+		fcoe_destroy_interface(lp->ifname);
+	}
+
+	for (idx = 0; idx < NR_CPUS; idx++) {
+		if (fci->fcoe_percpu[idx]) {
+			kthread_stop(fci->fcoe_percpu[idx]->thread);
+			p = fci->fcoe_percpu[idx];
+			spin_lock_bh(&p->fcoe_rx_list.lock);
+			while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
+				kfree_skb(skb);
+			spin_unlock_bh(&p->fcoe_rx_list.lock);
+			if (fci->fcoe_percpu[idx]->crc_eof_page)
+				put_page(fci->fcoe_percpu[idx]->crc_eof_page);
+			kfree(fci->fcoe_percpu[idx]);
+		}
+	}
+
+	fc_release_transport(fcoe_transport_template);
+}
+
+module_init(fcoeinit);
+module_exit(fcoe_exit);
-- 
1.5.2.4