2 * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 * Maintained at www.Open-FCoE.org
20 #include <linux/module.h>
21 #include <linux/version.h>
22 #include <linux/spinlock.h>
23 #include <linux/netdevice.h>
24 #include <linux/etherdevice.h>
25 #include <linux/ethtool.h>
26 #include <linux/if_ether.h>
27 #include <linux/if_vlan.h>
28 #include <linux/crc32.h>
29 #include <linux/slab.h>
30 #include <linux/cpu.h>
32 #include <linux/sysfs.h>
33 #include <linux/ctype.h>
34 #include <linux/workqueue.h>
35 #include <scsi/scsi_tcq.h>
36 #include <scsi/scsicam.h>
37 #include <scsi/scsi_transport.h>
38 #include <scsi/scsi_transport_fc.h>
39 #include <net/rtnetlink.h>
41 #include <scsi/fc/fc_encaps.h>
42 #include <scsi/fc/fc_fip.h>
44 #include <scsi/libfc.h>
45 #include <scsi/fc_frame.h>
46 #include <scsi/libfcoe.h>
50 MODULE_AUTHOR("Open-FCoE.org");
51 MODULE_DESCRIPTION("FCoE");
52 MODULE_LICENSE("GPL v2");
54 /* Performance tuning parameters for fcoe */
55 static unsigned int fcoe_ddp_min;
56 module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR);
57 MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \
58 "Direct Data Placement (DDP).");
60 DEFINE_MUTEX(fcoe_config_mutex);
62 static struct workqueue_struct *fcoe_wq;
64 /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */
65 static DECLARE_COMPLETION(fcoe_flush_completion);
68 /* must only by accessed under the RTNL mutex */
69 LIST_HEAD(fcoe_hostlist);
70 DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
72 /* Function Prototypes */
73 static int fcoe_reset(struct Scsi_Host *);
74 static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
75 static int fcoe_rcv(struct sk_buff *, struct net_device *,
76 struct packet_type *, struct net_device *);
77 static int fcoe_percpu_receive_thread(void *);
78 static void fcoe_percpu_clean(struct fc_lport *);
79 static int fcoe_link_speed_update(struct fc_lport *);
80 static int fcoe_link_ok(struct fc_lport *);
82 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
83 static int fcoe_hostlist_add(const struct fc_lport *);
85 static int fcoe_device_notification(struct notifier_block *, ulong, void *);
86 static void fcoe_dev_setup(void);
87 static void fcoe_dev_cleanup(void);
88 static struct fcoe_interface
89 *fcoe_hostlist_lookup_port(const struct net_device *);
91 static int fcoe_fip_recv(struct sk_buff *, struct net_device *,
92 struct packet_type *, struct net_device *);
94 static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *);
95 static void fcoe_update_src_mac(struct fc_lport *, u8 *);
96 static u8 *fcoe_get_src_mac(struct fc_lport *);
97 static void fcoe_destroy_work(struct work_struct *);
99 static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *,
101 static int fcoe_ddp_done(struct fc_lport *, u16);
102 static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *,
104 static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *);
106 static bool fcoe_match(struct net_device *netdev);
107 static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode);
108 static int fcoe_destroy(struct net_device *netdev);
109 static int fcoe_enable(struct net_device *netdev);
110 static int fcoe_disable(struct net_device *netdev);
112 static struct fc_seq *fcoe_elsct_send(struct fc_lport *,
113 u32 did, struct fc_frame *,
115 void (*resp)(struct fc_seq *,
118 void *, u32 timeout);
119 static void fcoe_recv_frame(struct sk_buff *skb);
121 static void fcoe_get_lesb(struct fc_lport *, struct fc_els_lesb *);
123 /* notification function for packets from net device */
124 static struct notifier_block fcoe_notifier = {
125 .notifier_call = fcoe_device_notification,
128 /* notification function for CPU hotplug events */
129 static struct notifier_block fcoe_cpu_notifier = {
130 .notifier_call = fcoe_cpu_callback,
133 static struct scsi_transport_template *fcoe_nport_scsi_transport;
134 static struct scsi_transport_template *fcoe_vport_scsi_transport;
136 static int fcoe_vport_destroy(struct fc_vport *);
137 static int fcoe_vport_create(struct fc_vport *, bool disabled);
138 static int fcoe_vport_disable(struct fc_vport *, bool disable);
139 static void fcoe_set_vport_symbolic_name(struct fc_vport *);
140 static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *);
141 static int fcoe_validate_vport_create(struct fc_vport *);
143 static struct libfc_function_template fcoe_libfc_fcn_templ = {
144 .frame_send = fcoe_xmit,
145 .ddp_setup = fcoe_ddp_setup,
146 .ddp_done = fcoe_ddp_done,
147 .ddp_target = fcoe_ddp_target,
148 .elsct_send = fcoe_elsct_send,
149 .get_lesb = fcoe_get_lesb,
150 .lport_set_port_id = fcoe_set_port_id,
153 struct fc_function_template fcoe_nport_fc_functions = {
154 .show_host_node_name = 1,
155 .show_host_port_name = 1,
156 .show_host_supported_classes = 1,
157 .show_host_supported_fc4s = 1,
158 .show_host_active_fc4s = 1,
159 .show_host_maxframe_size = 1,
161 .show_host_port_id = 1,
162 .show_host_supported_speeds = 1,
163 .get_host_speed = fc_get_host_speed,
164 .show_host_speed = 1,
165 .show_host_port_type = 1,
166 .get_host_port_state = fc_get_host_port_state,
167 .show_host_port_state = 1,
168 .show_host_symbolic_name = 1,
170 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
171 .show_rport_maxframe_size = 1,
172 .show_rport_supported_classes = 1,
174 .show_host_fabric_name = 1,
175 .show_starget_node_name = 1,
176 .show_starget_port_name = 1,
177 .show_starget_port_id = 1,
178 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
179 .show_rport_dev_loss_tmo = 1,
180 .get_fc_host_stats = fc_get_host_stats,
181 .issue_fc_host_lip = fcoe_reset,
183 .terminate_rport_io = fc_rport_terminate_io,
185 .vport_create = fcoe_vport_create,
186 .vport_delete = fcoe_vport_destroy,
187 .vport_disable = fcoe_vport_disable,
188 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
190 .bsg_request = fc_lport_bsg_request,
193 struct fc_function_template fcoe_vport_fc_functions = {
194 .show_host_node_name = 1,
195 .show_host_port_name = 1,
196 .show_host_supported_classes = 1,
197 .show_host_supported_fc4s = 1,
198 .show_host_active_fc4s = 1,
199 .show_host_maxframe_size = 1,
201 .show_host_port_id = 1,
202 .show_host_supported_speeds = 1,
203 .get_host_speed = fc_get_host_speed,
204 .show_host_speed = 1,
205 .show_host_port_type = 1,
206 .get_host_port_state = fc_get_host_port_state,
207 .show_host_port_state = 1,
208 .show_host_symbolic_name = 1,
210 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
211 .show_rport_maxframe_size = 1,
212 .show_rport_supported_classes = 1,
214 .show_host_fabric_name = 1,
215 .show_starget_node_name = 1,
216 .show_starget_port_name = 1,
217 .show_starget_port_id = 1,
218 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
219 .show_rport_dev_loss_tmo = 1,
220 .get_fc_host_stats = fc_get_host_stats,
221 .issue_fc_host_lip = fcoe_reset,
223 .terminate_rport_io = fc_rport_terminate_io,
225 .bsg_request = fc_lport_bsg_request,
228 static struct scsi_host_template fcoe_shost_template = {
229 .module = THIS_MODULE,
230 .name = "FCoE Driver",
231 .proc_name = FCOE_NAME,
232 .queuecommand = fc_queuecommand,
233 .eh_abort_handler = fc_eh_abort,
234 .eh_device_reset_handler = fc_eh_device_reset,
235 .eh_host_reset_handler = fc_eh_host_reset,
236 .slave_alloc = fc_slave_alloc,
237 .change_queue_depth = fc_change_queue_depth,
238 .change_queue_type = fc_change_queue_type,
241 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
242 .use_clustering = ENABLE_CLUSTERING,
243 .sg_tablesize = SG_ALL,
244 .max_sectors = 0xffff,
248 * fcoe_interface_setup() - Setup a FCoE interface
249 * @fcoe: The new FCoE interface
250 * @netdev: The net device that the fcoe interface is on
252 * Returns : 0 for success
253 * Locking: must be called with the RTNL mutex held
255 static int fcoe_interface_setup(struct fcoe_interface *fcoe,
256 struct net_device *netdev)
258 struct fcoe_ctlr *fip = &fcoe->ctlr;
259 struct netdev_hw_addr *ha;
260 struct net_device *real_dev;
261 u8 flogi_maddr[ETH_ALEN];
262 const struct net_device_ops *ops;
264 fcoe->netdev = netdev;
266 /* Let LLD initialize for FCoE */
267 ops = netdev->netdev_ops;
268 if (ops->ndo_fcoe_enable) {
269 if (ops->ndo_fcoe_enable(netdev))
270 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
271 " specific feature for LLD.\n");
274 /* Do not support for bonding device */
275 if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) {
276 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
280 /* look for SAN MAC address, if multiple SAN MACs exist, only
281 * use the first one for SPMA */
282 real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ?
283 vlan_dev_real_dev(netdev) : netdev;
285 for_each_dev_addr(real_dev, ha) {
286 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
287 (is_valid_ether_addr(ha->addr))) {
288 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
295 /* setup Source Mac Address */
297 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
300 * Add FCoE MAC address as second unicast MAC address
301 * or enter promiscuous mode if not capable of listening
302 * for multiple unicast MACs.
304 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
305 dev_uc_add(netdev, flogi_maddr);
307 dev_uc_add(netdev, fip->ctl_src_addr);
308 if (fip->mode == FIP_MODE_VN2VN) {
309 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS);
310 dev_mc_add(netdev, FIP_ALL_P2P_MACS);
312 dev_mc_add(netdev, FIP_ALL_ENODE_MACS);
315 * setup the receive function from ethernet driver
316 * on the ethertype for the given device
318 fcoe->fcoe_packet_type.func = fcoe_rcv;
319 fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
320 fcoe->fcoe_packet_type.dev = netdev;
321 dev_add_pack(&fcoe->fcoe_packet_type);
323 fcoe->fip_packet_type.func = fcoe_fip_recv;
324 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
325 fcoe->fip_packet_type.dev = netdev;
326 dev_add_pack(&fcoe->fip_packet_type);
332 * fcoe_interface_create() - Create a FCoE interface on a net device
333 * @netdev: The net device to create the FCoE interface on
334 * @fip_mode: The mode to use for FIP
336 * Returns: pointer to a struct fcoe_interface or NULL on error
338 static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
339 enum fip_state fip_mode)
341 struct fcoe_interface *fcoe;
344 if (!try_module_get(THIS_MODULE)) {
345 FCOE_NETDEV_DBG(netdev,
346 "Could not get a reference to the module\n");
347 fcoe = ERR_PTR(-EBUSY);
351 fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL);
353 FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n");
354 fcoe = ERR_PTR(-ENOMEM);
359 kref_init(&fcoe->kref);
364 fcoe_ctlr_init(&fcoe->ctlr, fip_mode);
365 fcoe->ctlr.send = fcoe_fip_send;
366 fcoe->ctlr.update_mac = fcoe_update_src_mac;
367 fcoe->ctlr.get_src_addr = fcoe_get_src_mac;
369 err = fcoe_interface_setup(fcoe, netdev);
371 fcoe_ctlr_destroy(&fcoe->ctlr);
381 module_put(THIS_MODULE);
387 * fcoe_interface_release() - fcoe_port kref release function
388 * @kref: Embedded reference count in an fcoe_interface struct
390 static void fcoe_interface_release(struct kref *kref)
392 struct fcoe_interface *fcoe;
393 struct net_device *netdev;
395 fcoe = container_of(kref, struct fcoe_interface, kref);
396 netdev = fcoe->netdev;
397 /* tear-down the FCoE controller */
398 fcoe_ctlr_destroy(&fcoe->ctlr);
401 module_put(THIS_MODULE);
405 * fcoe_interface_get() - Get a reference to a FCoE interface
406 * @fcoe: The FCoE interface to be held
408 static inline void fcoe_interface_get(struct fcoe_interface *fcoe)
410 kref_get(&fcoe->kref);
414 * fcoe_interface_put() - Put a reference to a FCoE interface
415 * @fcoe: The FCoE interface to be released
417 static inline void fcoe_interface_put(struct fcoe_interface *fcoe)
419 kref_put(&fcoe->kref, fcoe_interface_release);
423 * fcoe_interface_cleanup() - Clean up a FCoE interface
424 * @fcoe: The FCoE interface to be cleaned up
426 * Caller must be holding the RTNL mutex
428 void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
430 struct net_device *netdev = fcoe->netdev;
431 struct fcoe_ctlr *fip = &fcoe->ctlr;
432 u8 flogi_maddr[ETH_ALEN];
433 const struct net_device_ops *ops;
436 * Don't listen for Ethernet packets anymore.
437 * synchronize_net() ensures that the packet handlers are not running
438 * on another CPU. dev_remove_pack() would do that, this calls the
439 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
441 __dev_remove_pack(&fcoe->fcoe_packet_type);
442 __dev_remove_pack(&fcoe->fip_packet_type);
445 /* Delete secondary MAC addresses */
446 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
447 dev_uc_del(netdev, flogi_maddr);
449 dev_uc_del(netdev, fip->ctl_src_addr);
450 if (fip->mode == FIP_MODE_VN2VN) {
451 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);
452 dev_mc_del(netdev, FIP_ALL_P2P_MACS);
454 dev_mc_del(netdev, FIP_ALL_ENODE_MACS);
456 /* Tell the LLD we are done w/ FCoE */
457 ops = netdev->netdev_ops;
458 if (ops->ndo_fcoe_disable) {
459 if (ops->ndo_fcoe_disable(netdev))
460 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
461 " specific feature for LLD.\n");
464 /* Release the self-reference taken during fcoe_interface_create() */
465 fcoe_interface_put(fcoe);
469 * fcoe_fip_recv() - Handler for received FIP frames
470 * @skb: The receive skb
471 * @netdev: The associated net device
472 * @ptype: The packet_type structure which was used to register this handler
473 * @orig_dev: The original net_device the the skb was received on.
474 * (in case dev is a bond)
476 * Returns: 0 for success
478 static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
479 struct packet_type *ptype,
480 struct net_device *orig_dev)
482 struct fcoe_interface *fcoe;
484 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
485 fcoe_ctlr_recv(&fcoe->ctlr, skb);
490 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
491 * @fip: The FCoE controller
492 * @skb: The FIP packet to be sent
494 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
496 skb->dev = fcoe_from_ctlr(fip)->netdev;
501 * fcoe_update_src_mac() - Update the Ethernet MAC filters
502 * @lport: The local port to update the source MAC on
503 * @addr: Unicast MAC address to add
505 * Remove any previously-set unicast MAC filter.
506 * Add secondary FCoE MAC address filter for our OUI.
508 static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
510 struct fcoe_port *port = lport_priv(lport);
511 struct fcoe_interface *fcoe = port->priv;
514 if (!is_zero_ether_addr(port->data_src_addr))
515 dev_uc_del(fcoe->netdev, port->data_src_addr);
516 if (!is_zero_ether_addr(addr))
517 dev_uc_add(fcoe->netdev, addr);
518 memcpy(port->data_src_addr, addr, ETH_ALEN);
523 * fcoe_get_src_mac() - return the Ethernet source address for an lport
524 * @lport: libfc lport
526 static u8 *fcoe_get_src_mac(struct fc_lport *lport)
528 struct fcoe_port *port = lport_priv(lport);
530 return port->data_src_addr;
534 * fcoe_lport_config() - Set up a local port
535 * @lport: The local port to be setup
537 * Returns: 0 for success
539 static int fcoe_lport_config(struct fc_lport *lport)
543 lport->max_retry_count = 3;
544 lport->max_rport_retry_count = 3;
545 lport->e_d_tov = 2 * 1000; /* FC-FS default */
546 lport->r_a_tov = 2 * 2 * 1000;
547 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
548 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
549 lport->does_npiv = 1;
551 fc_lport_init_stats(lport);
553 /* lport fc_lport related configuration */
554 fc_lport_config(lport);
556 /* offload related configuration */
557 lport->crc_offload = 0;
558 lport->seq_offload = 0;
559 lport->lro_enabled = 0;
567 * fcoe_get_wwn() - Get the world wide name from LLD if it supports it
568 * @netdev: the associated net device
569 * @wwn: the output WWN
570 * @type: the type of WWN (WWPN or WWNN)
572 * Returns: 0 for success
574 static int fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type)
576 const struct net_device_ops *ops = netdev->netdev_ops;
578 if (ops->ndo_fcoe_get_wwn)
579 return ops->ndo_fcoe_get_wwn(netdev, wwn, type);
584 * fcoe_netdev_features_change - Updates the lport's offload flags based
585 * on the LLD netdev's FCoE feature flags
587 static void fcoe_netdev_features_change(struct fc_lport *lport,
588 struct net_device *netdev)
590 mutex_lock(&lport->lp_mutex);
592 if (netdev->features & NETIF_F_SG)
597 if (netdev->features & NETIF_F_FCOE_CRC) {
598 lport->crc_offload = 1;
599 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
601 lport->crc_offload = 0;
604 if (netdev->features & NETIF_F_FSO) {
605 lport->seq_offload = 1;
606 lport->lso_max = netdev->gso_max_size;
607 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
610 lport->seq_offload = 0;
614 if (netdev->fcoe_ddp_xid) {
615 lport->lro_enabled = 1;
616 lport->lro_xid = netdev->fcoe_ddp_xid;
617 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
620 lport->lro_enabled = 0;
624 mutex_unlock(&lport->lp_mutex);
628 * fcoe_netdev_config() - Set up net devive for SW FCoE
629 * @lport: The local port that is associated with the net device
630 * @netdev: The associated net device
632 * Must be called after fcoe_lport_config() as it will use local port mutex
634 * Returns: 0 for success
636 static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
640 struct fcoe_interface *fcoe;
641 struct fcoe_port *port;
643 /* Setup lport private data to point to fcoe softc */
644 port = lport_priv(lport);
648 * Determine max frame size based on underlying device and optional
649 * user-configured limit. If the MFS is too low, fcoe_link_ok()
650 * will return 0, so do this first.
653 if (netdev->features & NETIF_F_FCOE_MTU) {
655 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
657 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
658 if (fc_set_mfs(lport, mfs))
661 /* offload features support */
662 fcoe_netdev_features_change(lport, netdev);
664 skb_queue_head_init(&port->fcoe_pending_queue);
665 port->fcoe_pending_queue_active = 0;
666 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
668 fcoe_link_speed_update(lport);
671 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
672 wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0);
673 fc_set_wwnn(lport, wwnn);
674 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
675 wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr,
677 fc_set_wwpn(lport, wwpn);
684 * fcoe_shost_config() - Set up the SCSI host associated with a local port
685 * @lport: The local port
686 * @dev: The device associated with the SCSI host
688 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
690 * Returns: 0 for success
692 static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)
696 /* lport scsi host config */
697 lport->host->max_lun = FCOE_MAX_LUN;
698 lport->host->max_id = FCOE_MAX_FCP_TARGET;
699 lport->host->max_channel = 0;
700 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;
703 lport->host->transportt = fcoe_vport_scsi_transport;
705 lport->host->transportt = fcoe_nport_scsi_transport;
707 /* add the new host to the SCSI-ml */
708 rc = scsi_add_host(lport->host, dev);
710 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
711 "error on scsi_add_host\n");
716 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
718 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
719 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
720 fcoe_netdev(lport)->name);
726 * fcoe_oem_match() - The match routine for the offloaded exchange manager
729 * This routine will be associated with an exchange manager (EM). When
730 * the libfc exchange handling code is looking for an EM to use it will
731 * call this routine and pass it the frame that it wishes to send. This
732 * routine will return True if the associated EM is to be used and False
733 * if the echange code should continue looking for an EM.
735 * The offload EM that this routine is associated with will handle any
736 * packets that are for SCSI read requests.
738 * This has been enhanced to work when FCoE stack is operating in target
741 * Returns: True for read types I/O, otherwise returns false.
743 bool fcoe_oem_match(struct fc_frame *fp)
745 struct fc_frame_header *fh = fc_frame_header_get(fp);
746 struct fcp_cmnd *fcp;
748 if (fc_fcp_is_read(fr_fsp(fp)) &&
749 (fr_fsp(fp)->data_len > fcoe_ddp_min))
751 else if (!(ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)) {
752 fcp = fc_frame_payload_get(fp, sizeof(*fcp));
753 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN &&
754 fcp && (ntohl(fcp->fc_dl) > fcoe_ddp_min) &&
755 (fcp->fc_flags & FCP_CFL_WRDATA))
762 * fcoe_em_config() - Allocate and configure an exchange manager
763 * @lport: The local port that the new EM will be associated with
765 * Returns: 0 on success
767 static inline int fcoe_em_config(struct fc_lport *lport)
769 struct fcoe_port *port = lport_priv(lport);
770 struct fcoe_interface *fcoe = port->priv;
771 struct fcoe_interface *oldfcoe = NULL;
772 struct net_device *old_real_dev, *cur_real_dev;
773 u16 min_xid = FCOE_MIN_XID;
774 u16 max_xid = FCOE_MAX_XID;
777 * Check if need to allocate an em instance for
778 * offload exchange ids to be shared across all VN_PORTs/lport.
780 if (!lport->lro_enabled || !lport->lro_xid ||
781 (lport->lro_xid >= max_xid)) {
787 * Reuse existing offload em instance in case
788 * it is already allocated on real eth device
790 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
791 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
793 cur_real_dev = fcoe->netdev;
795 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
796 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
797 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
799 old_real_dev = oldfcoe->netdev;
801 if (cur_real_dev == old_real_dev) {
802 fcoe->oem = oldfcoe->oem;
808 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
809 printk(KERN_ERR "fcoe_em_config: failed to add "
810 "offload em:%p on interface:%s\n",
811 fcoe->oem, fcoe->netdev->name);
815 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
816 FCOE_MIN_XID, lport->lro_xid,
819 printk(KERN_ERR "fcoe_em_config: failed to allocate "
820 "em for offload exches on interface:%s\n",
827 * Exclude offload EM xid range from next EM xid range.
829 min_xid += lport->lro_xid + 1;
832 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
833 printk(KERN_ERR "fcoe_em_config: failed to "
834 "allocate em on interface %s\n", fcoe->netdev->name);
842 * fcoe_if_destroy() - Tear down a SW FCoE instance
843 * @lport: The local port to be destroyed
846 static void fcoe_if_destroy(struct fc_lport *lport)
848 struct fcoe_port *port = lport_priv(lport);
849 struct fcoe_interface *fcoe = port->priv;
850 struct net_device *netdev = fcoe->netdev;
852 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
854 /* Logout of the fabric */
855 fc_fabric_logoff(lport);
857 /* Cleanup the fc_lport */
858 fc_lport_destroy(lport);
860 /* Stop the transmit retry timer */
861 del_timer_sync(&port->timer);
863 /* Free existing transmit skbs */
864 fcoe_clean_pending_queue(lport);
867 if (!is_zero_ether_addr(port->data_src_addr))
868 dev_uc_del(netdev, port->data_src_addr);
871 /* Release reference held in fcoe_if_create() */
872 fcoe_interface_put(fcoe);
874 /* Free queued packets for the per-CPU receive threads */
875 fcoe_percpu_clean(lport);
877 /* Detach from the scsi-ml */
878 fc_remove_host(lport->host);
879 scsi_remove_host(lport->host);
881 /* Destroy lport scsi_priv */
882 fc_fcp_destroy(lport);
884 /* There are no more rports or I/O, free the EM */
885 fc_exch_mgr_free(lport);
887 /* Free memory used by statistical counters */
888 fc_lport_free_stats(lport);
890 /* Release the Scsi_Host */
891 scsi_host_put(lport->host);
895 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
896 * @lport: The local port to setup DDP for
897 * @xid: The exchange ID for this DDP transfer
898 * @sgl: The scatterlist describing this transfer
899 * @sgc: The number of sg items
901 * Returns: 0 if the DDP context was not configured
903 static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
904 struct scatterlist *sgl, unsigned int sgc)
906 struct net_device *netdev = fcoe_netdev(lport);
908 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
909 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
917 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device
918 * @lport: The local port to setup DDP for
919 * @xid: The exchange ID for this DDP transfer
920 * @sgl: The scatterlist describing this transfer
921 * @sgc: The number of sg items
923 * Returns: 0 if the DDP context was not configured
925 static int fcoe_ddp_target(struct fc_lport *lport, u16 xid,
926 struct scatterlist *sgl, unsigned int sgc)
928 struct net_device *netdev = fcoe_netdev(lport);
930 if (netdev->netdev_ops->ndo_fcoe_ddp_target)
931 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid,
939 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
940 * @lport: The local port to complete DDP on
941 * @xid: The exchange ID for this DDP transfer
943 * Returns: the length of data that have been completed by DDP
945 static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
947 struct net_device *netdev = fcoe_netdev(lport);
949 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
950 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
955 * fcoe_if_create() - Create a FCoE instance on an interface
956 * @fcoe: The FCoE interface to create a local port on
957 * @parent: The device pointer to be the parent in sysfs for the SCSI host
958 * @npiv: Indicates if the port is a vport or not
960 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
962 * Returns: The allocated fc_lport or an error pointer
964 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
965 struct device *parent, int npiv)
967 struct net_device *netdev = fcoe->netdev;
968 struct fc_lport *lport, *n_port;
969 struct fcoe_port *port;
970 struct Scsi_Host *shost;
973 * parent is only a vport if npiv is 1,
974 * but we'll only use vport in that case so go ahead and set it
976 struct fc_vport *vport = dev_to_vport(parent);
978 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
981 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port));
983 lport = libfc_vport_create(vport, sizeof(*port));
986 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
990 port = lport_priv(lport);
993 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH;
994 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH;
995 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
997 /* configure a fc_lport including the exchange manager */
998 rc = fcoe_lport_config(lport);
1000 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
1006 FCOE_NETDEV_DBG(netdev, "Setting vport names, "
1007 "%16.16llx %16.16llx\n",
1008 vport->node_name, vport->port_name);
1009 fc_set_wwnn(lport, vport->node_name);
1010 fc_set_wwpn(lport, vport->port_name);
1013 /* configure lport network properties */
1014 rc = fcoe_netdev_config(lport, netdev);
1016 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
1018 goto out_lp_destroy;
1021 /* configure lport scsi host properties */
1022 rc = fcoe_shost_config(lport, parent);
1024 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
1026 goto out_lp_destroy;
1029 /* Initialize the library */
1030 rc = fcoe_libfc_config(lport, &fcoe->ctlr, &fcoe_libfc_fcn_templ, 1);
1032 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
1034 goto out_lp_destroy;
1038 * fcoe_em_alloc() and fcoe_hostlist_add() both
1039 * need to be atomic with respect to other changes to the
1040 * hostlist since fcoe_em_alloc() looks for an existing EM
1041 * instance on host list updated by fcoe_hostlist_add().
1043 * This is currently handled through the fcoe_config_mutex
1047 /* lport exch manager allocation */
1048 rc = fcoe_em_config(lport);
1050 shost = vport_to_shost(vport);
1051 n_port = shost_priv(shost);
1052 rc = fc_exch_mgr_list_clone(n_port, lport);
1056 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n");
1057 goto out_lp_destroy;
1060 fcoe_interface_get(fcoe);
1064 fc_exch_mgr_free(lport);
1066 scsi_host_put(lport->host);
1072 * fcoe_if_init() - Initialization routine for fcoe.ko
1074 * Attaches the SW FCoE transport to the FC transport
1076 * Returns: 0 on success
1078 static int __init fcoe_if_init(void)
1080 /* attach to scsi transport */
1081 fcoe_nport_scsi_transport =
1082 fc_attach_transport(&fcoe_nport_fc_functions);
1083 fcoe_vport_scsi_transport =
1084 fc_attach_transport(&fcoe_vport_fc_functions);
1086 if (!fcoe_nport_scsi_transport) {
1087 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
1095 * fcoe_if_exit() - Tear down fcoe.ko
1097 * Detaches the SW FCoE transport from the FC transport
1099 * Returns: 0 on success
1101 int __exit fcoe_if_exit(void)
1103 fc_release_transport(fcoe_nport_scsi_transport);
1104 fc_release_transport(fcoe_vport_scsi_transport);
1105 fcoe_nport_scsi_transport = NULL;
1106 fcoe_vport_scsi_transport = NULL;
1111 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
1112 * @cpu: The CPU index of the CPU to create a receive thread for
1114 static void fcoe_percpu_thread_create(unsigned int cpu)
1116 struct fcoe_percpu_s *p;
1117 struct task_struct *thread;
1119 p = &per_cpu(fcoe_percpu, cpu);
1121 thread = kthread_create(fcoe_percpu_receive_thread,
1122 (void *)p, "fcoethread/%d", cpu);
1124 if (likely(!IS_ERR(thread))) {
1125 kthread_bind(thread, cpu);
1126 wake_up_process(thread);
1128 spin_lock_bh(&p->fcoe_rx_list.lock);
1130 spin_unlock_bh(&p->fcoe_rx_list.lock);
1135 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1136 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
1138 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1139 * current CPU's Rx thread. If the thread being destroyed is bound to
1140 * the CPU processing this context the skbs will be freed.
1142 static void fcoe_percpu_thread_destroy(unsigned int cpu)
1144 struct fcoe_percpu_s *p;
1145 struct task_struct *thread;
1146 struct page *crc_eof;
1147 struct sk_buff *skb;
1149 struct fcoe_percpu_s *p0;
1150 unsigned targ_cpu = get_cpu();
1151 #endif /* CONFIG_SMP */
1153 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu);
1155 /* Prevent any new skbs from being queued for this CPU. */
1156 p = &per_cpu(fcoe_percpu, cpu);
1157 spin_lock_bh(&p->fcoe_rx_list.lock);
1160 crc_eof = p->crc_eof_page;
1161 p->crc_eof_page = NULL;
1162 p->crc_eof_offset = 0;
1163 spin_unlock_bh(&p->fcoe_rx_list.lock);
1167 * Don't bother moving the skb's if this context is running
1168 * on the same CPU that is having its thread destroyed. This
1169 * can easily happen when the module is removed.
1171 if (cpu != targ_cpu) {
1172 p0 = &per_cpu(fcoe_percpu, targ_cpu);
1173 spin_lock_bh(&p0->fcoe_rx_list.lock);
1175 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1178 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1179 __skb_queue_tail(&p0->fcoe_rx_list, skb);
1180 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1183 * The targeted CPU is not initialized and cannot accept
1184 * new skbs. Unlock the targeted CPU and drop the skbs
1185 * on the CPU that is going offline.
1187 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1189 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1193 * This scenario occurs when the module is being removed
1194 * and all threads are being destroyed. skbs will continue
1195 * to be shifted from the CPU thread that is being removed
1196 * to the CPU thread associated with the CPU that is processing
1197 * the module removal. Once there is only one CPU Rx thread it
1198 * will reach this case and we will drop all skbs and later
1201 spin_lock_bh(&p->fcoe_rx_list.lock);
1202 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1204 spin_unlock_bh(&p->fcoe_rx_list.lock);
1209 * This a non-SMP scenario where the singular Rx thread is
1210 * being removed. Free all skbs and stop the thread.
1212 spin_lock_bh(&p->fcoe_rx_list.lock);
1213 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1215 spin_unlock_bh(&p->fcoe_rx_list.lock);
1219 kthread_stop(thread);
1226 * fcoe_cpu_callback() - Handler for CPU hotplug events
1227 * @nfb: The callback data block
1228 * @action: The event triggering the callback
1229 * @hcpu: The index of the CPU that the event is for
1231 * This creates or destroys per-CPU data for fcoe
1233 * Returns NOTIFY_OK always.
1235 static int fcoe_cpu_callback(struct notifier_block *nfb,
1236 unsigned long action, void *hcpu)
1238 unsigned cpu = (unsigned long)hcpu;
1242 case CPU_ONLINE_FROZEN:
1243 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu);
1244 fcoe_percpu_thread_create(cpu);
1247 case CPU_DEAD_FROZEN:
1248 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu);
1249 fcoe_percpu_thread_destroy(cpu);
1258 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming
1260 * @curr_cpu: CPU which received request
1262 * This routine selects next CPU based on cpumask.
1264 * Returns: int (CPU number). Caller to verify if returned CPU is online or not.
1266 static unsigned int fcoe_select_cpu(unsigned int curr_cpu)
1268 static unsigned int selected_cpu;
1270 if (num_online_cpus() == 1)
1273 * Doing following check, to skip "curr_cpu (smp_processor_id)"
1274 * from selection of CPU is intentional. This is to avoid same CPU
1275 * doing post-processing of command. "curr_cpu" to just receive
1276 * incoming request in case where rx_id is UNKNOWN and all other
1277 * CPU to actually process the command(s)
1280 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask);
1281 if (selected_cpu >= nr_cpu_ids)
1282 selected_cpu = cpumask_first(cpu_online_mask);
1283 } while (selected_cpu == curr_cpu);
1284 return selected_cpu;
1288 * fcoe_rcv() - Receive packets from a net device
1289 * @skb: The received packet
1290 * @netdev: The net device that the packet was received on
1291 * @ptype: The packet type context
1292 * @olddev: The last device net device
1294 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1295 * FC frame and passes the frame to libfc.
1297 * Returns: 0 for success
1299 int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
1300 struct packet_type *ptype, struct net_device *olddev)
1302 struct fc_lport *lport;
1303 struct fcoe_rcv_info *fr;
1304 struct fcoe_interface *fcoe;
1305 struct fc_frame_header *fh;
1306 struct fcoe_percpu_s *fps;
1310 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
1311 lport = fcoe->ctlr.lp;
1312 if (unlikely(!lport)) {
1313 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure");
1316 if (!lport->link_up)
1319 FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p "
1320 "data:%p tail:%p end:%p sum:%d dev:%s",
1321 skb->len, skb->data_len, skb->head, skb->data,
1322 skb_tail_pointer(skb), skb_end_pointer(skb),
1323 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
1327 if (is_fip_mode(&fcoe->ctlr) &&
1328 compare_ether_addr(eh->h_source, fcoe->ctlr.dest_addr)) {
1329 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
1335 * Check for minimum frame length, and make sure required FCoE
1336 * and FC headers are pulled into the linear data area.
1338 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1339 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
1342 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1343 fh = (struct fc_frame_header *) skb_transport_header(skb);
1345 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) {
1346 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n",
1351 fr = fcoe_dev_from_skb(skb);
1356 * In case the incoming frame's exchange is originated from
1357 * the initiator, then received frame's exchange id is ANDed
1358 * with fc_cpu_mask bits to get the same cpu on which exchange
1359 * was originated, otherwise just use the current cpu.
1361 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1362 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
1364 cpu = smp_processor_id();
1366 if ((fh->fh_type == FC_TYPE_FCP) &&
1367 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) {
1369 cpu = fcoe_select_cpu(cpu);
1370 } while (!cpu_online(cpu));
1371 } else if ((fh->fh_type == FC_TYPE_FCP) &&
1372 (ntohs(fh->fh_rx_id) != FC_XID_UNKNOWN)) {
1373 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask;
1375 cpu = smp_processor_id();
1377 fps = &per_cpu(fcoe_percpu, cpu);
1378 spin_lock_bh(&fps->fcoe_rx_list.lock);
1379 if (unlikely(!fps->thread)) {
1381 * The targeted CPU is not ready, let's target
1382 * the first CPU now. For non-SMP systems this
1383 * will check the same CPU twice.
1385 FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread "
1386 "ready for incoming skb- using first online "
1389 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1390 cpu = cpumask_first(cpu_online_mask);
1391 fps = &per_cpu(fcoe_percpu, cpu);
1392 spin_lock_bh(&fps->fcoe_rx_list.lock);
1394 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1400 * We now have a valid CPU that we're targeting for
1401 * this skb. We also have this receive thread locked,
1402 * so we're free to queue skbs into it's queue.
1405 /* If this is a SCSI-FCP frame, and this is already executing on the
1406 * correct CPU, and the queue for this CPU is empty, then go ahead
1407 * and process the frame directly in the softirq context.
1408 * This lets us process completions without context switching from the
1409 * NET_RX softirq, to our receive processing thread, and then back to
1410 * BLOCK softirq context.
1412 if (fh->fh_type == FC_TYPE_FCP &&
1413 cpu == smp_processor_id() &&
1414 skb_queue_empty(&fps->fcoe_rx_list)) {
1415 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1416 fcoe_recv_frame(skb);
1418 __skb_queue_tail(&fps->fcoe_rx_list, skb);
1419 if (fps->fcoe_rx_list.qlen == 1)
1420 wake_up_process(fps->thread);
1421 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1426 per_cpu_ptr(lport->dev_stats, get_cpu())->ErrorFrames++;
1434 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1435 * @skb: The packet to be transmitted
1436 * @tlen: The total length of the trailer
1438 * Returns: 0 for success
1440 static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)
1442 struct fcoe_percpu_s *fps;
1445 fps = &get_cpu_var(fcoe_percpu);
1446 rc = fcoe_get_paged_crc_eof(skb, tlen, fps);
1447 put_cpu_var(fcoe_percpu);
1453 * fcoe_xmit() - Transmit a FCoE frame
1454 * @lport: The local port that the frame is to be transmitted for
1455 * @fp: The frame to be transmitted
1457 * Return: 0 for success
1459 int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
1464 struct fcoe_crc_eof *cp;
1465 struct sk_buff *skb;
1466 struct fcoe_dev_stats *stats;
1467 struct fc_frame_header *fh;
1468 unsigned int hlen; /* header length implies the version */
1469 unsigned int tlen; /* trailer length */
1470 unsigned int elen; /* eth header, may include vlan */
1471 struct fcoe_port *port = lport_priv(lport);
1472 struct fcoe_interface *fcoe = port->priv;
1474 struct fcoe_hdr *hp;
1476 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1478 fh = fc_frame_header_get(fp);
1480 wlen = skb->len / FCOE_WORD_TO_BYTE;
1482 if (!lport->link_up) {
1487 if (unlikely(fh->fh_type == FC_TYPE_ELS) &&
1488 fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb))
1494 elen = sizeof(struct ethhdr);
1495 hlen = sizeof(struct fcoe_hdr);
1496 tlen = sizeof(struct fcoe_crc_eof);
1497 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1500 if (likely(lport->crc_offload)) {
1501 skb->ip_summed = CHECKSUM_PARTIAL;
1502 skb->csum_start = skb_headroom(skb);
1503 skb->csum_offset = skb->len;
1506 skb->ip_summed = CHECKSUM_NONE;
1507 crc = fcoe_fc_crc(fp);
1510 /* copy port crc and eof to the skb buff */
1511 if (skb_is_nonlinear(skb)) {
1513 if (fcoe_alloc_paged_crc_eof(skb, tlen)) {
1517 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1518 cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ)
1519 + frag->page_offset;
1521 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
1524 memset(cp, 0, sizeof(*cp));
1526 cp->fcoe_crc32 = cpu_to_le32(~crc);
1528 if (skb_is_nonlinear(skb)) {
1529 kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ);
1533 /* adjust skb network/transport offsets to match mac/fcoe/port */
1534 skb_push(skb, elen + hlen);
1535 skb_reset_mac_header(skb);
1536 skb_reset_network_header(skb);
1537 skb->mac_len = elen;
1538 skb->protocol = htons(ETH_P_FCOE);
1539 skb->dev = fcoe->netdev;
1541 /* fill up mac and fcoe headers */
1543 eh->h_proto = htons(ETH_P_FCOE);
1544 memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN);
1545 if (fcoe->ctlr.map_dest)
1546 memcpy(eh->h_dest + 3, fh->fh_d_id, 3);
1548 if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN))
1549 memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN);
1551 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
1553 hp = (struct fcoe_hdr *)(eh + 1);
1554 memset(hp, 0, sizeof(*hp));
1556 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1559 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1560 if (lport->seq_offload && fr_max_payload(fp)) {
1561 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1562 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1564 skb_shinfo(skb)->gso_type = 0;
1565 skb_shinfo(skb)->gso_size = 0;
1567 /* update tx stats: regardless if LLD fails */
1568 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1570 stats->TxWords += wlen;
1573 /* send down to lld */
1575 if (port->fcoe_pending_queue.qlen)
1576 fcoe_check_wait_queue(lport, skb);
1577 else if (fcoe_start_io(skb))
1578 fcoe_check_wait_queue(lport, skb);
1584 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1585 * @skb: The completed skb (argument required by destructor)
1587 static void fcoe_percpu_flush_done(struct sk_buff *skb)
1589 complete(&fcoe_flush_completion);
1593 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
1594 * @lport: The local port the frame was received on
1595 * @fp: The received frame
1597 * Return: 0 on passing filtering checks
1599 static inline int fcoe_filter_frames(struct fc_lport *lport,
1600 struct fc_frame *fp)
1602 struct fcoe_interface *fcoe;
1603 struct fc_frame_header *fh;
1604 struct sk_buff *skb = (struct sk_buff *)fp;
1605 struct fcoe_dev_stats *stats;
1608 * We only check CRC if no offload is available and if it is
1609 * it's solicited data, in which case, the FCP layer would
1610 * check it during the copy.
1612 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
1613 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1615 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1617 fh = (struct fc_frame_header *) skb_transport_header(skb);
1618 fh = fc_frame_header_get(fp);
1619 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP)
1622 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;
1623 if (is_fip_mode(&fcoe->ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
1624 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
1625 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1629 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) ||
1630 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) {
1631 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1635 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1636 stats->InvalidCRCCount++;
1637 if (stats->InvalidCRCCount < 5)
1638 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
1643 * fcoe_recv_frame() - process a single received frame
1644 * @skb: frame to process
1646 static void fcoe_recv_frame(struct sk_buff *skb)
1649 struct fc_lport *lport;
1650 struct fcoe_rcv_info *fr;
1651 struct fcoe_dev_stats *stats;
1652 struct fcoe_crc_eof crc_eof;
1653 struct fc_frame *fp;
1654 struct fcoe_port *port;
1655 struct fcoe_hdr *hp;
1657 fr = fcoe_dev_from_skb(skb);
1659 if (unlikely(!lport)) {
1660 if (skb->destructor != fcoe_percpu_flush_done)
1661 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb");
1666 FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d "
1667 "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
1668 skb->len, skb->data_len,
1669 skb->head, skb->data, skb_tail_pointer(skb),
1670 skb_end_pointer(skb), skb->csum,
1671 skb->dev ? skb->dev->name : "<NULL>");
1673 port = lport_priv(lport);
1674 if (skb_is_nonlinear(skb))
1675 skb_linearize(skb); /* not ideal */
1678 * Frame length checks and setting up the header pointers
1679 * was done in fcoe_rcv already.
1681 hp = (struct fcoe_hdr *) skb_network_header(skb);
1683 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1684 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1685 if (stats->ErrorFrames < 5)
1686 printk(KERN_WARNING "fcoe: FCoE version "
1687 "mismatch: The frame has "
1688 "version %x, but the "
1689 "initiator supports version "
1690 "%x\n", FC_FCOE_DECAPS_VER(hp),
1695 skb_pull(skb, sizeof(struct fcoe_hdr));
1696 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1699 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1701 fp = (struct fc_frame *)skb;
1704 fr_sof(fp) = hp->fcoe_sof;
1706 /* Copy out the CRC and EOF trailer for access */
1707 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof)))
1709 fr_eof(fp) = crc_eof.fcoe_eof;
1710 fr_crc(fp) = crc_eof.fcoe_crc32;
1711 if (pskb_trim(skb, fr_len))
1714 if (!fcoe_filter_frames(lport, fp)) {
1716 fc_exch_recv(lport, fp);
1720 stats->ErrorFrames++;
1726 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1727 * @arg: The per-CPU context
1729 * Return: 0 for success
1731 int fcoe_percpu_receive_thread(void *arg)
1733 struct fcoe_percpu_s *p = arg;
1734 struct sk_buff *skb;
1736 set_user_nice(current, -20);
1738 while (!kthread_should_stop()) {
1740 spin_lock_bh(&p->fcoe_rx_list.lock);
1741 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) {
1742 set_current_state(TASK_INTERRUPTIBLE);
1743 spin_unlock_bh(&p->fcoe_rx_list.lock);
1745 set_current_state(TASK_RUNNING);
1746 if (kthread_should_stop())
1748 spin_lock_bh(&p->fcoe_rx_list.lock);
1750 spin_unlock_bh(&p->fcoe_rx_list.lock);
1751 fcoe_recv_frame(skb);
1757 * fcoe_dev_setup() - Setup the link change notification interface
1759 static void fcoe_dev_setup(void)
1761 register_netdevice_notifier(&fcoe_notifier);
1765 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1767 static void fcoe_dev_cleanup(void)
1769 unregister_netdevice_notifier(&fcoe_notifier);
1773 * fcoe_device_notification() - Handler for net device events
1774 * @notifier: The context of the notification
1775 * @event: The type of event
1776 * @ptr: The net device that the event was on
1778 * This function is called by the Ethernet driver in case of link change event.
1780 * Returns: 0 for success
1782 static int fcoe_device_notification(struct notifier_block *notifier,
1783 ulong event, void *ptr)
1785 struct fc_lport *lport = NULL;
1786 struct net_device *netdev = ptr;
1787 struct fcoe_interface *fcoe;
1788 struct fcoe_port *port;
1789 struct fcoe_dev_stats *stats;
1790 u32 link_possible = 1;
1794 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1795 if (fcoe->netdev == netdev) {
1796 lport = fcoe->ctlr.lp;
1807 case NETDEV_GOING_DOWN:
1813 case NETDEV_CHANGEMTU:
1814 if (netdev->features & NETIF_F_FCOE_MTU)
1816 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
1817 sizeof(struct fcoe_crc_eof));
1818 if (mfs >= FC_MIN_MAX_FRAME)
1819 fc_set_mfs(lport, mfs);
1821 case NETDEV_REGISTER:
1823 case NETDEV_UNREGISTER:
1824 list_del(&fcoe->list);
1825 port = lport_priv(fcoe->ctlr.lp);
1826 queue_work(fcoe_wq, &port->destroy_work);
1829 case NETDEV_FEAT_CHANGE:
1830 fcoe_netdev_features_change(lport, netdev);
1833 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
1834 "from netdev netlink\n", event);
1837 fcoe_link_speed_update(lport);
1839 if (link_possible && !fcoe_link_ok(lport))
1840 fcoe_ctlr_link_up(&fcoe->ctlr);
1841 else if (fcoe_ctlr_link_down(&fcoe->ctlr)) {
1842 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1843 stats->LinkFailureCount++;
1845 fcoe_clean_pending_queue(lport);
1852 * fcoe_disable() - Disables a FCoE interface
1853 * @netdev : The net_device object the Ethernet interface to create on
1855 * Called from fcoe transport.
1857 * Returns: 0 for success
1859 static int fcoe_disable(struct net_device *netdev)
1861 struct fcoe_interface *fcoe;
1864 mutex_lock(&fcoe_config_mutex);
1867 fcoe = fcoe_hostlist_lookup_port(netdev);
1871 fcoe_ctlr_link_down(&fcoe->ctlr);
1872 fcoe_clean_pending_queue(fcoe->ctlr.lp);
1876 mutex_unlock(&fcoe_config_mutex);
1881 * fcoe_enable() - Enables a FCoE interface
1882 * @netdev : The net_device object the Ethernet interface to create on
1884 * Called from fcoe transport.
1886 * Returns: 0 for success
1888 static int fcoe_enable(struct net_device *netdev)
1890 struct fcoe_interface *fcoe;
1893 mutex_lock(&fcoe_config_mutex);
1895 fcoe = fcoe_hostlist_lookup_port(netdev);
1900 else if (!fcoe_link_ok(fcoe->ctlr.lp))
1901 fcoe_ctlr_link_up(&fcoe->ctlr);
1903 mutex_unlock(&fcoe_config_mutex);
1908 * fcoe_destroy() - Destroy a FCoE interface
1909 * @netdev : The net_device object the Ethernet interface to create on
1911 * Called from fcoe transport
1913 * Returns: 0 for success
1915 static int fcoe_destroy(struct net_device *netdev)
1917 struct fcoe_interface *fcoe;
1918 struct fc_lport *lport;
1919 struct fcoe_port *port;
1922 mutex_lock(&fcoe_config_mutex);
1924 fcoe = fcoe_hostlist_lookup_port(netdev);
1929 lport = fcoe->ctlr.lp;
1930 port = lport_priv(lport);
1931 list_del(&fcoe->list);
1932 queue_work(fcoe_wq, &port->destroy_work);
1935 mutex_unlock(&fcoe_config_mutex);
1940 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
1941 * @work: Handle to the FCoE port to be destroyed
1943 static void fcoe_destroy_work(struct work_struct *work)
1945 struct fcoe_port *port;
1946 struct fcoe_interface *fcoe;
1949 port = container_of(work, struct fcoe_port, destroy_work);
1950 mutex_lock(&fcoe_config_mutex);
1952 /* set if this is an NPIV port */
1953 npiv = port->lport->vport ? 1 : 0;
1956 fcoe_if_destroy(port->lport);
1958 /* Do not tear down the fcoe interface for NPIV port */
1961 fcoe_interface_cleanup(fcoe);
1965 mutex_unlock(&fcoe_config_mutex);
1969 * fcoe_match() - Check if the FCoE is supported on the given netdevice
1970 * @netdev : The net_device object the Ethernet interface to create on
1972 * Called from fcoe transport.
1974 * Returns: always returns true as this is the default FCoE transport,
1975 * i.e., support all netdevs.
1977 static bool fcoe_match(struct net_device *netdev)
1983 * fcoe_create() - Create a fcoe interface
1984 * @netdev : The net_device object the Ethernet interface to create on
1985 * @fip_mode: The FIP mode for this creation
1987 * Called from fcoe transport
1989 * Returns: 0 for success
1991 static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode)
1994 struct fcoe_interface *fcoe;
1995 struct fc_lport *lport;
1997 mutex_lock(&fcoe_config_mutex);
2000 /* look for existing lport */
2001 if (fcoe_hostlist_lookup(netdev)) {
2006 fcoe = fcoe_interface_create(netdev, fip_mode);
2012 lport = fcoe_if_create(fcoe, &netdev->dev, 0);
2013 if (IS_ERR(lport)) {
2014 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
2017 fcoe_interface_cleanup(fcoe);
2021 /* Make this the "master" N_Port */
2022 fcoe->ctlr.lp = lport;
2024 /* add to lports list */
2025 fcoe_hostlist_add(lport);
2027 /* start FIP Discovery and FLOGI */
2028 lport->boot_time = jiffies;
2029 fc_fabric_login(lport);
2030 if (!fcoe_link_ok(lport))
2031 fcoe_ctlr_link_up(&fcoe->ctlr);
2035 mutex_unlock(&fcoe_config_mutex);
2040 * fcoe_link_speed_update() - Update the supported and actual link speeds
2041 * @lport: The local port to update speeds for
2043 * Returns: 0 if the ethtool query was successful
2044 * -1 if the ethtool query failed
2046 int fcoe_link_speed_update(struct fc_lport *lport)
2048 struct net_device *netdev = fcoe_netdev(lport);
2049 struct ethtool_cmd ecmd;
2051 if (!dev_ethtool_get_settings(netdev, &ecmd)) {
2052 lport->link_supported_speeds &=
2053 ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
2054 if (ecmd.supported & (SUPPORTED_1000baseT_Half |
2055 SUPPORTED_1000baseT_Full))
2056 lport->link_supported_speeds |= FC_PORTSPEED_1GBIT;
2057 if (ecmd.supported & SUPPORTED_10000baseT_Full)
2058 lport->link_supported_speeds |=
2059 FC_PORTSPEED_10GBIT;
2060 switch (ethtool_cmd_speed(&ecmd)) {
2062 lport->link_speed = FC_PORTSPEED_1GBIT;
2065 lport->link_speed = FC_PORTSPEED_10GBIT;
2074 * fcoe_link_ok() - Check if the link is OK for a local port
2075 * @lport: The local port to check link on
2077 * Returns: 0 if link is UP and OK, -1 if not
2080 int fcoe_link_ok(struct fc_lport *lport)
2082 struct net_device *netdev = fcoe_netdev(lport);
2084 if (netif_oper_up(netdev))
2090 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2091 * @lport: The local port whose skbs are to be cleared
2093 * Must be called with fcoe_create_mutex held to single-thread completion.
2095 * This flushes the pending skbs by adding a new skb to each queue and
2096 * waiting until they are all freed. This assures us that not only are
2097 * there no packets that will be handled by the lport, but also that any
2098 * threads already handling packet have returned.
2100 void fcoe_percpu_clean(struct fc_lport *lport)
2102 struct fcoe_percpu_s *pp;
2103 struct fcoe_rcv_info *fr;
2104 struct sk_buff_head *list;
2105 struct sk_buff *skb, *next;
2106 struct sk_buff *head;
2109 for_each_possible_cpu(cpu) {
2110 pp = &per_cpu(fcoe_percpu, cpu);
2111 spin_lock_bh(&pp->fcoe_rx_list.lock);
2112 list = &pp->fcoe_rx_list;
2114 for (skb = head; skb != (struct sk_buff *)list;
2117 fr = fcoe_dev_from_skb(skb);
2118 if (fr->fr_dev == lport) {
2119 __skb_unlink(skb, list);
2124 if (!pp->thread || !cpu_online(cpu)) {
2125 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2129 skb = dev_alloc_skb(0);
2131 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2134 skb->destructor = fcoe_percpu_flush_done;
2136 __skb_queue_tail(&pp->fcoe_rx_list, skb);
2137 if (pp->fcoe_rx_list.qlen == 1)
2138 wake_up_process(pp->thread);
2139 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2141 wait_for_completion(&fcoe_flush_completion);
2146 * fcoe_reset() - Reset a local port
2147 * @shost: The SCSI host associated with the local port to be reset
2149 * Returns: Always 0 (return value required by FC transport template)
2151 int fcoe_reset(struct Scsi_Host *shost)
2153 struct fc_lport *lport = shost_priv(shost);
2154 struct fcoe_port *port = lport_priv(lport);
2155 struct fcoe_interface *fcoe = port->priv;
2157 fcoe_ctlr_link_down(&fcoe->ctlr);
2158 fcoe_clean_pending_queue(fcoe->ctlr.lp);
2159 if (!fcoe_link_ok(fcoe->ctlr.lp))
2160 fcoe_ctlr_link_up(&fcoe->ctlr);
2165 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2166 * @netdev: The net device used as a key
2168 * Locking: Must be called with the RNL mutex held.
2170 * Returns: NULL or the FCoE interface
2172 static struct fcoe_interface *
2173 fcoe_hostlist_lookup_port(const struct net_device *netdev)
2175 struct fcoe_interface *fcoe;
2177 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
2178 if (fcoe->netdev == netdev)
2185 * fcoe_hostlist_lookup() - Find the local port associated with a
2187 * @netdev: The netdevice used as a key
2189 * Locking: Must be called with the RTNL mutex held
2191 * Returns: NULL or the local port
2193 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
2195 struct fcoe_interface *fcoe;
2197 fcoe = fcoe_hostlist_lookup_port(netdev);
2198 return (fcoe) ? fcoe->ctlr.lp : NULL;
2202 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2203 * port to the hostlist
2204 * @lport: The local port that identifies the FCoE interface to be added
2206 * Locking: must be called with the RTNL mutex held
2208 * Returns: 0 for success
2210 static int fcoe_hostlist_add(const struct fc_lport *lport)
2212 struct fcoe_interface *fcoe;
2213 struct fcoe_port *port;
2215 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2217 port = lport_priv(lport);
2219 list_add_tail(&fcoe->list, &fcoe_hostlist);
2225 static struct fcoe_transport fcoe_sw_transport = {
2226 .name = {FCOE_TRANSPORT_DEFAULT},
2228 .list = LIST_HEAD_INIT(fcoe_sw_transport.list),
2229 .match = fcoe_match,
2230 .create = fcoe_create,
2231 .destroy = fcoe_destroy,
2232 .enable = fcoe_enable,
2233 .disable = fcoe_disable,
2237 * fcoe_init() - Initialize fcoe.ko
2239 * Returns: 0 on success, or a negative value on failure
2241 static int __init fcoe_init(void)
2243 struct fcoe_percpu_s *p;
2247 fcoe_wq = alloc_workqueue("fcoe", 0, 0);
2251 /* register as a fcoe transport */
2252 rc = fcoe_transport_attach(&fcoe_sw_transport);
2254 printk(KERN_ERR "failed to register an fcoe transport, check "
2255 "if libfcoe is loaded\n");
2259 mutex_lock(&fcoe_config_mutex);
2261 for_each_possible_cpu(cpu) {
2262 p = &per_cpu(fcoe_percpu, cpu);
2263 skb_queue_head_init(&p->fcoe_rx_list);
2266 for_each_online_cpu(cpu)
2267 fcoe_percpu_thread_create(cpu);
2269 /* Initialize per CPU interrupt thread */
2270 rc = register_hotcpu_notifier(&fcoe_cpu_notifier);
2274 /* Setup link change notification */
2277 rc = fcoe_if_init();
2281 mutex_unlock(&fcoe_config_mutex);
2285 for_each_online_cpu(cpu) {
2286 fcoe_percpu_thread_destroy(cpu);
2288 mutex_unlock(&fcoe_config_mutex);
2289 destroy_workqueue(fcoe_wq);
2292 module_init(fcoe_init);
2295 * fcoe_exit() - Clean up fcoe.ko
2297 * Returns: 0 on success or a negative value on failure
2299 static void __exit fcoe_exit(void)
2301 struct fcoe_interface *fcoe, *tmp;
2302 struct fcoe_port *port;
2305 mutex_lock(&fcoe_config_mutex);
2309 /* releases the associated fcoe hosts */
2311 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
2312 list_del(&fcoe->list);
2313 port = lport_priv(fcoe->ctlr.lp);
2314 queue_work(fcoe_wq, &port->destroy_work);
2318 unregister_hotcpu_notifier(&fcoe_cpu_notifier);
2320 for_each_online_cpu(cpu)
2321 fcoe_percpu_thread_destroy(cpu);
2323 mutex_unlock(&fcoe_config_mutex);
2326 * destroy_work's may be chained but destroy_workqueue()
2327 * can take care of them. Just kill the fcoe_wq.
2329 destroy_workqueue(fcoe_wq);
2332 * Detaching from the scsi transport must happen after all
2333 * destroys are done on the fcoe_wq. destroy_workqueue will
2334 * enusre the fcoe_wq is flushed.
2338 /* detach from fcoe transport */
2339 fcoe_transport_detach(&fcoe_sw_transport);
2341 module_exit(fcoe_exit);
2344 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2345 * @seq: active sequence in the FLOGI or FDISC exchange
2346 * @fp: response frame, or error encoded in a pointer (timeout)
2347 * @arg: pointer the the fcoe_ctlr structure
2349 * This handles MAC address management for FCoE, then passes control on to
2350 * the libfc FLOGI response handler.
2352 static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2354 struct fcoe_ctlr *fip = arg;
2355 struct fc_exch *exch = fc_seq_exch(seq);
2356 struct fc_lport *lport = exch->lp;
2362 mac = fr_cb(fp)->granted_mac;
2363 if (is_zero_ether_addr(mac)) {
2365 if (fcoe_ctlr_recv_flogi(fip, lport, fp)) {
2370 fcoe_update_src_mac(lport, mac);
2372 fc_lport_flogi_resp(seq, fp, lport);
2376 * fcoe_logo_resp() - FCoE specific LOGO response handler
2377 * @seq: active sequence in the LOGO exchange
2378 * @fp: response frame, or error encoded in a pointer (timeout)
2379 * @arg: pointer the the fcoe_ctlr structure
2381 * This handles MAC address management for FCoE, then passes control on to
2382 * the libfc LOGO response handler.
2384 static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2386 struct fc_lport *lport = arg;
2387 static u8 zero_mac[ETH_ALEN] = { 0 };
2390 fcoe_update_src_mac(lport, zero_mac);
2391 fc_lport_logo_resp(seq, fp, lport);
2395 * fcoe_elsct_send - FCoE specific ELS handler
2397 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2398 * using FCoE specific response handlers and passing the FIP controller as
2399 * the argument (the lport is still available from the exchange).
2401 * Most of the work here is just handed off to the libfc routine.
2403 static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2404 struct fc_frame *fp, unsigned int op,
2405 void (*resp)(struct fc_seq *,
2408 void *arg, u32 timeout)
2410 struct fcoe_port *port = lport_priv(lport);
2411 struct fcoe_interface *fcoe = port->priv;
2412 struct fcoe_ctlr *fip = &fcoe->ctlr;
2413 struct fc_frame_header *fh = fc_frame_header_get(fp);
2418 if (lport->point_to_multipoint)
2420 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2423 /* only hook onto fabric logouts, not port logouts */
2424 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2426 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
2429 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2433 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2434 * @vport: fc_vport object to create a new fc_host for
2435 * @disabled: start the new fc_host in a disabled state by default?
2437 * Returns: 0 for success
2439 static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2441 struct Scsi_Host *shost = vport_to_shost(vport);
2442 struct fc_lport *n_port = shost_priv(shost);
2443 struct fcoe_port *port = lport_priv(n_port);
2444 struct fcoe_interface *fcoe = port->priv;
2445 struct net_device *netdev = fcoe->netdev;
2446 struct fc_lport *vn_port;
2450 rc = fcoe_validate_vport_create(vport);
2452 wwn_to_str(vport->port_name, buf, sizeof(buf));
2453 printk(KERN_ERR "fcoe: Failed to create vport, "
2454 "WWPN (0x%s) already exists\n",
2459 mutex_lock(&fcoe_config_mutex);
2460 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
2461 mutex_unlock(&fcoe_config_mutex);
2463 if (IS_ERR(vn_port)) {
2464 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2470 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2472 vn_port->boot_time = jiffies;
2473 fc_fabric_login(vn_port);
2474 fc_vport_setlink(vn_port);
2480 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2481 * @vport: fc_vport object that is being destroyed
2483 * Returns: 0 for success
2485 static int fcoe_vport_destroy(struct fc_vport *vport)
2487 struct Scsi_Host *shost = vport_to_shost(vport);
2488 struct fc_lport *n_port = shost_priv(shost);
2489 struct fc_lport *vn_port = vport->dd_data;
2490 struct fcoe_port *port = lport_priv(vn_port);
2492 mutex_lock(&n_port->lp_mutex);
2493 list_del(&vn_port->list);
2494 mutex_unlock(&n_port->lp_mutex);
2495 queue_work(fcoe_wq, &port->destroy_work);
2500 * fcoe_vport_disable() - change vport state
2501 * @vport: vport to bring online/offline
2502 * @disable: should the vport be disabled?
2504 static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2506 struct fc_lport *lport = vport->dd_data;
2509 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2510 fc_fabric_logoff(lport);
2512 lport->boot_time = jiffies;
2513 fc_fabric_login(lport);
2514 fc_vport_setlink(lport);
2521 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2522 * @vport: fc_vport with a new symbolic name string
2524 * After generating a new symbolic name string, a new RSPN_ID request is
2525 * sent to the name server. There is no response handler, so if it fails
2526 * for some reason it will not be retried.
2528 static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2530 struct fc_lport *lport = vport->dd_data;
2531 struct fc_frame *fp;
2534 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2535 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2536 fcoe_netdev(lport)->name, vport->symbolic_name);
2538 if (lport->state != LPORT_ST_READY)
2541 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2542 fp = fc_frame_alloc(lport,
2543 sizeof(struct fc_ct_hdr) +
2544 sizeof(struct fc_ns_rspn) + len);
2547 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
2548 NULL, NULL, 3 * lport->r_a_tov);
2552 * fcoe_get_lesb() - Fill the FCoE Link Error Status Block
2553 * @lport: the local port
2554 * @fc_lesb: the link error status block
2556 static void fcoe_get_lesb(struct fc_lport *lport,
2557 struct fc_els_lesb *fc_lesb)
2560 u32 lfc, vlfc, mdac;
2561 struct fcoe_dev_stats *devst;
2562 struct fcoe_fc_els_lesb *lesb;
2563 struct rtnl_link_stats64 temp;
2564 struct net_device *netdev = fcoe_netdev(lport);
2569 lesb = (struct fcoe_fc_els_lesb *)fc_lesb;
2570 memset(lesb, 0, sizeof(*lesb));
2571 for_each_possible_cpu(cpu) {
2572 devst = per_cpu_ptr(lport->dev_stats, cpu);
2573 lfc += devst->LinkFailureCount;
2574 vlfc += devst->VLinkFailureCount;
2575 mdac += devst->MissDiscAdvCount;
2577 lesb->lesb_link_fail = htonl(lfc);
2578 lesb->lesb_vlink_fail = htonl(vlfc);
2579 lesb->lesb_miss_fka = htonl(mdac);
2580 lesb->lesb_fcs_error = htonl(dev_get_stats(netdev, &temp)->rx_crc_errors);
2584 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2585 * @lport: the local port
2586 * @port_id: the port ID
2587 * @fp: the received frame, if any, that caused the port_id to be set.
2589 * This routine handles the case where we received a FLOGI and are
2590 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2591 * so it can set the non-mapped mode and gateway address.
2593 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2595 static void fcoe_set_port_id(struct fc_lport *lport,
2596 u32 port_id, struct fc_frame *fp)
2598 struct fcoe_port *port = lport_priv(lport);
2599 struct fcoe_interface *fcoe = port->priv;
2601 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
2602 fcoe_ctlr_recv_flogi(&fcoe->ctlr, lport, fp);
2606 * fcoe_validate_vport_create() - Validate a vport before creating it
2607 * @vport: NPIV port to be created
2609 * This routine is meant to add validation for a vport before creating it
2610 * via fcoe_vport_create().
2611 * Current validations are:
2612 * - WWPN supplied is unique for given lport
2616 static int fcoe_validate_vport_create(struct fc_vport *vport)
2618 struct Scsi_Host *shost = vport_to_shost(vport);
2619 struct fc_lport *n_port = shost_priv(shost);
2620 struct fc_lport *vn_port;
2624 mutex_lock(&n_port->lp_mutex);
2626 wwn_to_str(vport->port_name, buf, sizeof(buf));
2627 /* Check if the wwpn is not same as that of the lport */
2628 if (!memcmp(&n_port->wwpn, &vport->port_name, sizeof(u64))) {
2629 FCOE_DBG("vport WWPN 0x%s is same as that of the "
2630 "base port WWPN\n", buf);
2635 /* Check if there is any existing vport with same wwpn */
2636 list_for_each_entry(vn_port, &n_port->vports, list) {
2637 if (!memcmp(&vn_port->wwpn, &vport->port_name, sizeof(u64))) {
2638 FCOE_DBG("vport with given WWPN 0x%s already "
2646 mutex_unlock(&n_port->lp_mutex);