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@xxxxxxxxx>
Signed-off-by: Chris Leech <christopher.leech@xxxxxxxxx>
Signed-off-by: Vasu Dev <vasu.dev@xxxxxxxxx>
Signed-off-by: Yi Zou <yi.zou@xxxxxxxxx>
Signed-off-by: Steve Ma <steve.ma@xxxxxxxxx>
---
drivers/scsi/Kconfig | 6
drivers/scsi/Makefile | 1
drivers/scsi/fcoe/Makefile | 8 +
drivers/scsi/fcoe/fc_fcoe.h | 108 +++++++
drivers/scsi/fcoe/fcoe_def.h | 100 +++++++
drivers/scsi/fcoe/fcoe_dev.c | 633 ++++++++++++++++++++++++++++++++++++++++++
drivers/scsi/fcoe/fcoe_if.c | 504 +++++++++++++++++++++++++++++++++
drivers/scsi/fcoe/fcoeinit.c | 432 +++++++++++++++++++++++++++++
8 files changed, 1792 insertions(+), 0 deletions(-)
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index ae5e574..07b0196 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..b0aa59e 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/fc_fcoe.h b/drivers/scsi/fcoe/fc_fcoe.h
new file mode 100644
index 0000000..b2e07ec
--- /dev/null
+++ b/drivers/scsi/fcoe/fc_fcoe.h
@@ -0,0 +1,108 @@
+/*
+ * 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 _FC_FCOE_H_
+#define _FC_FCOE_H_
+
+/*
+ * FCoE - Fibre Channel over Ethernet.
+ */
+
+/*
+ * The FCoE ethertype eventually goes in net/if_ether.h.
+ */
+#ifndef ETH_P_FCOE
+#define ETH_P_FCOE 0x8906 /* FCOE ether type */
+#endif
+
+/*
+ * FC_FCOE_OUI hasn't been standardized yet. XXX TBD.
+ */
+#ifndef FC_FCOE_OUI
+#define FC_FCOE_OUI 0x0efc00 /* upper 24 bits of FCOE dest MAC TBD */
+#endif
+
+/*
+ * The destination MAC address for the fabric login may get a different OUI.
+ * This isn't standardized yet.
+ */
+#ifndef FC_FCOE_FLOGI_MAC
+/* gateway MAC - TBD */
+#define FC_FCOE_FLOGI_MAC { 0x0e, 0xfc, 0x00, 0xff, 0xff, 0xfe }
+#endif
+
+#define FC_FCOE_VER 0 /* version */
+
+/*
+ * Ethernet Addresses based on FC S_ID and D_ID.
+ * Generated by FC_FCOE_OUI | S_ID/D_ID
+ */
+#define FC_FCOE_ENCAPS_ID(n) (((u64) FC_FCOE_OUI << 24) | (n))
+#define FC_FCOE_DECAPS_ID(n) ((n) >> 24)
+
+/*
+ * FCoE frame header - 14 bytes
+ *
+ * This is the August 2007 version of the FCoE header as defined by T11.
+ * This follows the VLAN header, which includes the ethertype.
+ */
+struct fcoe_hdr {
+ __u8 fcoe_ver; /* version field - upper 4 bits */
+ __u8 fcoe_resvd[12]; /* reserved - send zero and ignore */
+ __u8 fcoe_sof; /* start of frame per RFC 3643 */
+};
+
+#define FC_FCOE_DECAPS_VER(hp) ((hp)->fcoe_ver >> 4)
+#define FC_FCOE_ENCAPS_VER(hp, ver) ((hp)->fcoe_ver = (ver) << 4)
+
+/*
+ * FCoE CRC & EOF - 8 bytes.
+ */
+struct fcoe_crc_eof {
+ __le32 fcoe_crc32; /* CRC for FC packet */
+ __u8 fcoe_eof; /* EOF from RFC 3643 */
+ __u8 fcoe_resvd[3]; /* reserved - send zero and ignore */
+} __attribute__((packed));
+
+/*
+ * Store OUI + DID into MAC address field.
+ */
+static inline void fc_fcoe_set_mac(u8 *mac, u8 *did)
+{
+ mac[0] = (u8) (FC_FCOE_OUI >> 16);
+ mac[1] = (u8) (FC_FCOE_OUI >> 8);
+ mac[2] = (u8) FC_FCOE_OUI;
+ mac[3] = did[0];
+ mac[4] = did[1];
+ mac[5] = did[2];
+}
+
+/*
+ * VLAN header. This is also defined in linux/if_vlan.h, but for kernels only.
+ */
+struct fcoe_vlan_hdr {
+ __be16 vlan_tag; /* VLAN tag including priority */
+ __be16 vlan_ethertype; /* encapsulated ethertype ETH_P_FCOE */
+};
+
+#ifndef ETH_P_8021Q
+#define ETH_P_8021Q 0x8100
+#endif
+
+#endif /* _FC_FCOE_H_ */
diff --git a/drivers/scsi/fcoe/fcoe_def.h b/drivers/scsi/fcoe/fcoe_def.h
new file mode 100644
index 0000000..defea60
--- /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 "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..4579a66
--- /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 "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..b5a32c6
--- /dev/null
+++ b/drivers/scsi/fcoe/fcoe_if.c
@@ -0,0 +1,504 @@
+/*
+ * 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 "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 checks pause settings, which can change with link.
+ * This also updates the speed setting, which may change with link for 100/1000.
+ */
+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_pauseparam pause = { ETHTOOL_GPAUSEPARAM };
+ struct ethtool_cmd ecmd = { ETHTOOL_GSET };
+ int rc = 0;
+
+ if ((dev->flags & IFF_UP) && netif_carrier_ok(dev)) {
+ dev = fc->phys_dev;
+ dev->ethtool_ops->get_pauseparam(dev, &pause);
+ 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;
+
+ /*
+ * for 10 G (and faster), ignore autoneg requirement.
+ */
+ if (ecmd.speed >= SPEED_10000)
+ pause.autoneg = 1;
+ }
+ if (!pause.autoneg || !pause.tx_pause || !pause.rx_pause)
+ rc = -1;
+ } 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, 0);
+ 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..375699f
--- /dev/null
+++ b/drivers/scsi/fcoe/fcoeinit.c
@@ -0,0 +1,432 @@
+/*
+ * 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,
+
+ .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,
+ .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) {
+ 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;
+
+ sysfs_create_file(&THIS_MODULE->mkobj.kobj, &fcoe_destroyattr.attr);
+ sysfs_create_file(&THIS_MODULE->mkobj.kobj, &fcoe_createattr.attr);
+
+ 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);
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
