--- /dev/null
+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
+
projects / ipfire-2.x.git / blobdiff