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/spinlock.h>
22 #include <linux/netdevice.h>
23 #include <linux/etherdevice.h>
24 #include <linux/ethtool.h>
25 #include <linux/if_ether.h>
26 #include <linux/if_vlan.h>
27 #include <linux/crc32.h>
28 #include <linux/slab.h>
29 #include <linux/cpu.h>
31 #include <linux/sysfs.h>
32 #include <linux/ctype.h>
33 #include <linux/workqueue.h>
34 #include <scsi/scsi_tcq.h>
35 #include <scsi/scsicam.h>
36 #include <scsi/scsi_transport.h>
37 #include <scsi/scsi_transport_fc.h>
38 #include <net/rtnetlink.h>
40 #include <scsi/fc/fc_encaps.h>
41 #include <scsi/fc/fc_fip.h>
43 #include <scsi/libfc.h>
44 #include <scsi/fc_frame.h>
45 #include <scsi/libfcoe.h>
49 MODULE_AUTHOR("Open-FCoE.org");
50 MODULE_DESCRIPTION("FCoE");
51 MODULE_LICENSE("GPL v2");
53 /* Performance tuning parameters for fcoe */
54 static unsigned int fcoe_ddp_min;
55 module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR);
56 MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \
57 "Direct Data Placement (DDP).");
59 DEFINE_MUTEX(fcoe_config_mutex);
61 static struct workqueue_struct *fcoe_wq;
63 /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */
64 static DECLARE_COMPLETION(fcoe_flush_completion);
67 /* must only by accessed under the RTNL mutex */
68 LIST_HEAD(fcoe_hostlist);
69 DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
71 /* Function Prototypes */
72 static int fcoe_reset(struct Scsi_Host *);
73 static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
74 static int fcoe_rcv(struct sk_buff *, struct net_device *,
75 struct packet_type *, struct net_device *);
76 static int fcoe_percpu_receive_thread(void *);
77 static void fcoe_percpu_clean(struct fc_lport *);
78 static int fcoe_link_speed_update(struct fc_lport *);
79 static int fcoe_link_ok(struct fc_lport *);
81 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
82 static int fcoe_hostlist_add(const struct fc_lport *);
84 static int fcoe_device_notification(struct notifier_block *, ulong, void *);
85 static void fcoe_dev_setup(void);
86 static void fcoe_dev_cleanup(void);
87 static struct fcoe_interface
88 *fcoe_hostlist_lookup_port(const struct net_device *);
90 static int fcoe_fip_recv(struct sk_buff *, struct net_device *,
91 struct packet_type *, struct net_device *);
93 static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *);
94 static void fcoe_update_src_mac(struct fc_lport *, u8 *);
95 static u8 *fcoe_get_src_mac(struct fc_lport *);
96 static void fcoe_destroy_work(struct work_struct *);
98 static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *,
100 static int fcoe_ddp_done(struct fc_lport *, u16);
101 static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *,
103 static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *);
105 static bool fcoe_match(struct net_device *netdev);
106 static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode);
107 static int fcoe_destroy(struct net_device *netdev);
108 static int fcoe_enable(struct net_device *netdev);
109 static int fcoe_disable(struct net_device *netdev);
111 static struct fc_seq *fcoe_elsct_send(struct fc_lport *,
112 u32 did, struct fc_frame *,
114 void (*resp)(struct fc_seq *,
117 void *, u32 timeout);
118 static void fcoe_recv_frame(struct sk_buff *skb);
120 static void fcoe_get_lesb(struct fc_lport *, struct fc_els_lesb *);
122 /* notification function for packets from net device */
123 static struct notifier_block fcoe_notifier = {
124 .notifier_call = fcoe_device_notification,
127 /* notification function for CPU hotplug events */
128 static struct notifier_block fcoe_cpu_notifier = {
129 .notifier_call = fcoe_cpu_callback,
132 static struct scsi_transport_template *fcoe_nport_scsi_transport;
133 static struct scsi_transport_template *fcoe_vport_scsi_transport;
135 static int fcoe_vport_destroy(struct fc_vport *);
136 static int fcoe_vport_create(struct fc_vport *, bool disabled);
137 static int fcoe_vport_disable(struct fc_vport *, bool disable);
138 static void fcoe_set_vport_symbolic_name(struct fc_vport *);
139 static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *);
140 static int fcoe_validate_vport_create(struct fc_vport *);
142 static struct libfc_function_template fcoe_libfc_fcn_templ = {
143 .frame_send = fcoe_xmit,
144 .ddp_setup = fcoe_ddp_setup,
145 .ddp_done = fcoe_ddp_done,
146 .ddp_target = fcoe_ddp_target,
147 .elsct_send = fcoe_elsct_send,
148 .get_lesb = fcoe_get_lesb,
149 .lport_set_port_id = fcoe_set_port_id,
152 struct fc_function_template fcoe_nport_fc_functions = {
153 .show_host_node_name = 1,
154 .show_host_port_name = 1,
155 .show_host_supported_classes = 1,
156 .show_host_supported_fc4s = 1,
157 .show_host_active_fc4s = 1,
158 .show_host_maxframe_size = 1,
160 .show_host_port_id = 1,
161 .show_host_supported_speeds = 1,
162 .get_host_speed = fc_get_host_speed,
163 .show_host_speed = 1,
164 .show_host_port_type = 1,
165 .get_host_port_state = fc_get_host_port_state,
166 .show_host_port_state = 1,
167 .show_host_symbolic_name = 1,
169 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
170 .show_rport_maxframe_size = 1,
171 .show_rport_supported_classes = 1,
173 .show_host_fabric_name = 1,
174 .show_starget_node_name = 1,
175 .show_starget_port_name = 1,
176 .show_starget_port_id = 1,
177 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
178 .show_rport_dev_loss_tmo = 1,
179 .get_fc_host_stats = fc_get_host_stats,
180 .issue_fc_host_lip = fcoe_reset,
182 .terminate_rport_io = fc_rport_terminate_io,
184 .vport_create = fcoe_vport_create,
185 .vport_delete = fcoe_vport_destroy,
186 .vport_disable = fcoe_vport_disable,
187 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
189 .bsg_request = fc_lport_bsg_request,
192 struct fc_function_template fcoe_vport_fc_functions = {
193 .show_host_node_name = 1,
194 .show_host_port_name = 1,
195 .show_host_supported_classes = 1,
196 .show_host_supported_fc4s = 1,
197 .show_host_active_fc4s = 1,
198 .show_host_maxframe_size = 1,
200 .show_host_port_id = 1,
201 .show_host_supported_speeds = 1,
202 .get_host_speed = fc_get_host_speed,
203 .show_host_speed = 1,
204 .show_host_port_type = 1,
205 .get_host_port_state = fc_get_host_port_state,
206 .show_host_port_state = 1,
207 .show_host_symbolic_name = 1,
209 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
210 .show_rport_maxframe_size = 1,
211 .show_rport_supported_classes = 1,
213 .show_host_fabric_name = 1,
214 .show_starget_node_name = 1,
215 .show_starget_port_name = 1,
216 .show_starget_port_id = 1,
217 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
218 .show_rport_dev_loss_tmo = 1,
219 .get_fc_host_stats = fc_get_host_stats,
220 .issue_fc_host_lip = fcoe_reset,
222 .terminate_rport_io = fc_rport_terminate_io,
224 .bsg_request = fc_lport_bsg_request,
227 static struct scsi_host_template fcoe_shost_template = {
228 .module = THIS_MODULE,
229 .name = "FCoE Driver",
230 .proc_name = FCOE_NAME,
231 .queuecommand = fc_queuecommand,
232 .eh_abort_handler = fc_eh_abort,
233 .eh_device_reset_handler = fc_eh_device_reset,
234 .eh_host_reset_handler = fc_eh_host_reset,
235 .slave_alloc = fc_slave_alloc,
236 .change_queue_depth = fc_change_queue_depth,
237 .change_queue_type = fc_change_queue_type,
240 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
241 .use_clustering = ENABLE_CLUSTERING,
242 .sg_tablesize = SG_ALL,
243 .max_sectors = 0xffff,
247 * fcoe_interface_setup() - Setup a FCoE interface
248 * @fcoe: The new FCoE interface
249 * @netdev: The net device that the fcoe interface is on
251 * Returns : 0 for success
252 * Locking: must be called with the RTNL mutex held
254 static int fcoe_interface_setup(struct fcoe_interface *fcoe,
255 struct net_device *netdev)
257 struct fcoe_ctlr *fip = &fcoe->ctlr;
258 struct netdev_hw_addr *ha;
259 struct net_device *real_dev;
260 u8 flogi_maddr[ETH_ALEN];
261 const struct net_device_ops *ops;
263 fcoe->netdev = netdev;
265 /* Let LLD initialize for FCoE */
266 ops = netdev->netdev_ops;
267 if (ops->ndo_fcoe_enable) {
268 if (ops->ndo_fcoe_enable(netdev))
269 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
270 " specific feature for LLD.\n");
273 /* Do not support for bonding device */
274 if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) {
275 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
279 /* look for SAN MAC address, if multiple SAN MACs exist, only
280 * use the first one for SPMA */
281 real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ?
282 vlan_dev_real_dev(netdev) : netdev;
284 for_each_dev_addr(real_dev, ha) {
285 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
286 (is_valid_ether_addr(ha->addr))) {
287 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
294 /* setup Source Mac Address */
296 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
299 * Add FCoE MAC address as second unicast MAC address
300 * or enter promiscuous mode if not capable of listening
301 * for multiple unicast MACs.
303 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
304 dev_uc_add(netdev, flogi_maddr);
306 dev_uc_add(netdev, fip->ctl_src_addr);
307 if (fip->mode == FIP_MODE_VN2VN) {
308 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS);
309 dev_mc_add(netdev, FIP_ALL_P2P_MACS);
311 dev_mc_add(netdev, FIP_ALL_ENODE_MACS);
314 * setup the receive function from ethernet driver
315 * on the ethertype for the given device
317 fcoe->fcoe_packet_type.func = fcoe_rcv;
318 fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
319 fcoe->fcoe_packet_type.dev = netdev;
320 dev_add_pack(&fcoe->fcoe_packet_type);
322 fcoe->fip_packet_type.func = fcoe_fip_recv;
323 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
324 fcoe->fip_packet_type.dev = netdev;
325 dev_add_pack(&fcoe->fip_packet_type);
331 * fcoe_interface_create() - Create a FCoE interface on a net device
332 * @netdev: The net device to create the FCoE interface on
333 * @fip_mode: The mode to use for FIP
335 * Returns: pointer to a struct fcoe_interface or NULL on error
337 static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
338 enum fip_state fip_mode)
340 struct fcoe_interface *fcoe;
343 if (!try_module_get(THIS_MODULE)) {
344 FCOE_NETDEV_DBG(netdev,
345 "Could not get a reference to the module\n");
346 fcoe = ERR_PTR(-EBUSY);
350 fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL);
352 FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n");
353 fcoe = ERR_PTR(-ENOMEM);
358 kref_init(&fcoe->kref);
363 fcoe_ctlr_init(&fcoe->ctlr, fip_mode);
364 fcoe->ctlr.send = fcoe_fip_send;
365 fcoe->ctlr.update_mac = fcoe_update_src_mac;
366 fcoe->ctlr.get_src_addr = fcoe_get_src_mac;
368 err = fcoe_interface_setup(fcoe, netdev);
370 fcoe_ctlr_destroy(&fcoe->ctlr);
380 module_put(THIS_MODULE);
386 * fcoe_interface_release() - fcoe_port kref release function
387 * @kref: Embedded reference count in an fcoe_interface struct
389 static void fcoe_interface_release(struct kref *kref)
391 struct fcoe_interface *fcoe;
392 struct net_device *netdev;
394 fcoe = container_of(kref, struct fcoe_interface, kref);
395 netdev = fcoe->netdev;
396 /* tear-down the FCoE controller */
397 fcoe_ctlr_destroy(&fcoe->ctlr);
400 module_put(THIS_MODULE);
404 * fcoe_interface_get() - Get a reference to a FCoE interface
405 * @fcoe: The FCoE interface to be held
407 static inline void fcoe_interface_get(struct fcoe_interface *fcoe)
409 kref_get(&fcoe->kref);
413 * fcoe_interface_put() - Put a reference to a FCoE interface
414 * @fcoe: The FCoE interface to be released
416 static inline void fcoe_interface_put(struct fcoe_interface *fcoe)
418 kref_put(&fcoe->kref, fcoe_interface_release);
422 * fcoe_interface_cleanup() - Clean up a FCoE interface
423 * @fcoe: The FCoE interface to be cleaned up
425 * Caller must be holding the RTNL mutex
427 void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
429 struct net_device *netdev = fcoe->netdev;
430 struct fcoe_ctlr *fip = &fcoe->ctlr;
431 u8 flogi_maddr[ETH_ALEN];
432 const struct net_device_ops *ops;
435 * Don't listen for Ethernet packets anymore.
436 * synchronize_net() ensures that the packet handlers are not running
437 * on another CPU. dev_remove_pack() would do that, this calls the
438 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
440 __dev_remove_pack(&fcoe->fcoe_packet_type);
441 __dev_remove_pack(&fcoe->fip_packet_type);
444 /* Delete secondary MAC addresses */
445 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
446 dev_uc_del(netdev, flogi_maddr);
448 dev_uc_del(netdev, fip->ctl_src_addr);
449 if (fip->mode == FIP_MODE_VN2VN) {
450 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);
451 dev_mc_del(netdev, FIP_ALL_P2P_MACS);
453 dev_mc_del(netdev, FIP_ALL_ENODE_MACS);
455 /* Tell the LLD we are done w/ FCoE */
456 ops = netdev->netdev_ops;
457 if (ops->ndo_fcoe_disable) {
458 if (ops->ndo_fcoe_disable(netdev))
459 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
460 " specific feature for LLD.\n");
463 /* Release the self-reference taken during fcoe_interface_create() */
464 fcoe_interface_put(fcoe);
468 * fcoe_fip_recv() - Handler for received FIP frames
469 * @skb: The receive skb
470 * @netdev: The associated net device
471 * @ptype: The packet_type structure which was used to register this handler
472 * @orig_dev: The original net_device the the skb was received on.
473 * (in case dev is a bond)
475 * Returns: 0 for success
477 static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
478 struct packet_type *ptype,
479 struct net_device *orig_dev)
481 struct fcoe_interface *fcoe;
483 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
484 fcoe_ctlr_recv(&fcoe->ctlr, skb);
489 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
490 * @fip: The FCoE controller
491 * @skb: The FIP packet to be sent
493 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
495 skb->dev = fcoe_from_ctlr(fip)->netdev;
500 * fcoe_update_src_mac() - Update the Ethernet MAC filters
501 * @lport: The local port to update the source MAC on
502 * @addr: Unicast MAC address to add
504 * Remove any previously-set unicast MAC filter.
505 * Add secondary FCoE MAC address filter for our OUI.
507 static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
509 struct fcoe_port *port = lport_priv(lport);
510 struct fcoe_interface *fcoe = port->priv;
513 if (!is_zero_ether_addr(port->data_src_addr))
514 dev_uc_del(fcoe->netdev, port->data_src_addr);
515 if (!is_zero_ether_addr(addr))
516 dev_uc_add(fcoe->netdev, addr);
517 memcpy(port->data_src_addr, addr, ETH_ALEN);
522 * fcoe_get_src_mac() - return the Ethernet source address for an lport
523 * @lport: libfc lport
525 static u8 *fcoe_get_src_mac(struct fc_lport *lport)
527 struct fcoe_port *port = lport_priv(lport);
529 return port->data_src_addr;
533 * fcoe_lport_config() - Set up a local port
534 * @lport: The local port to be setup
536 * Returns: 0 for success
538 static int fcoe_lport_config(struct fc_lport *lport)
542 lport->max_retry_count = 3;
543 lport->max_rport_retry_count = 3;
544 lport->e_d_tov = 2 * 1000; /* FC-FS default */
545 lport->r_a_tov = 2 * 2 * 1000;
546 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
547 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
548 lport->does_npiv = 1;
550 fc_lport_init_stats(lport);
552 /* lport fc_lport related configuration */
553 fc_lport_config(lport);
555 /* offload related configuration */
556 lport->crc_offload = 0;
557 lport->seq_offload = 0;
558 lport->lro_enabled = 0;
566 * fcoe_get_wwn() - Get the world wide name from LLD if it supports it
567 * @netdev: the associated net device
568 * @wwn: the output WWN
569 * @type: the type of WWN (WWPN or WWNN)
571 * Returns: 0 for success
573 static int fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type)
575 const struct net_device_ops *ops = netdev->netdev_ops;
577 if (ops->ndo_fcoe_get_wwn)
578 return ops->ndo_fcoe_get_wwn(netdev, wwn, type);
583 * fcoe_netdev_features_change - Updates the lport's offload flags based
584 * on the LLD netdev's FCoE feature flags
586 static void fcoe_netdev_features_change(struct fc_lport *lport,
587 struct net_device *netdev)
589 mutex_lock(&lport->lp_mutex);
591 if (netdev->features & NETIF_F_SG)
596 if (netdev->features & NETIF_F_FCOE_CRC) {
597 lport->crc_offload = 1;
598 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
600 lport->crc_offload = 0;
603 if (netdev->features & NETIF_F_FSO) {
604 lport->seq_offload = 1;
605 lport->lso_max = netdev->gso_max_size;
606 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
609 lport->seq_offload = 0;
613 if (netdev->fcoe_ddp_xid) {
614 lport->lro_enabled = 1;
615 lport->lro_xid = netdev->fcoe_ddp_xid;
616 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
619 lport->lro_enabled = 0;
623 mutex_unlock(&lport->lp_mutex);
627 * fcoe_netdev_config() - Set up net devive for SW FCoE
628 * @lport: The local port that is associated with the net device
629 * @netdev: The associated net device
631 * Must be called after fcoe_lport_config() as it will use local port mutex
633 * Returns: 0 for success
635 static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
639 struct fcoe_interface *fcoe;
640 struct fcoe_port *port;
642 /* Setup lport private data to point to fcoe softc */
643 port = lport_priv(lport);
647 * Determine max frame size based on underlying device and optional
648 * user-configured limit. If the MFS is too low, fcoe_link_ok()
649 * will return 0, so do this first.
652 if (netdev->features & NETIF_F_FCOE_MTU) {
654 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
656 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
657 if (fc_set_mfs(lport, mfs))
660 /* offload features support */
661 fcoe_netdev_features_change(lport, netdev);
663 skb_queue_head_init(&port->fcoe_pending_queue);
664 port->fcoe_pending_queue_active = 0;
665 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
667 fcoe_link_speed_update(lport);
670 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
671 wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0);
672 fc_set_wwnn(lport, wwnn);
673 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
674 wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr,
676 fc_set_wwpn(lport, wwpn);
683 * fcoe_shost_config() - Set up the SCSI host associated with a local port
684 * @lport: The local port
685 * @dev: The device associated with the SCSI host
687 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
689 * Returns: 0 for success
691 static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)
695 /* lport scsi host config */
696 lport->host->max_lun = FCOE_MAX_LUN;
697 lport->host->max_id = FCOE_MAX_FCP_TARGET;
698 lport->host->max_channel = 0;
699 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;
702 lport->host->transportt = fcoe_vport_scsi_transport;
704 lport->host->transportt = fcoe_nport_scsi_transport;
706 /* add the new host to the SCSI-ml */
707 rc = scsi_add_host(lport->host, dev);
709 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
710 "error on scsi_add_host\n");
715 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
717 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
718 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
719 fcoe_netdev(lport)->name);
725 * fcoe_oem_match() - The match routine for the offloaded exchange manager
728 * This routine will be associated with an exchange manager (EM). When
729 * the libfc exchange handling code is looking for an EM to use it will
730 * call this routine and pass it the frame that it wishes to send. This
731 * routine will return True if the associated EM is to be used and False
732 * if the echange code should continue looking for an EM.
734 * The offload EM that this routine is associated with will handle any
735 * packets that are for SCSI read requests.
737 * This has been enhanced to work when FCoE stack is operating in target
740 * Returns: True for read types I/O, otherwise returns false.
742 bool fcoe_oem_match(struct fc_frame *fp)
744 struct fc_frame_header *fh = fc_frame_header_get(fp);
745 struct fcp_cmnd *fcp;
747 if (fc_fcp_is_read(fr_fsp(fp)) &&
748 (fr_fsp(fp)->data_len > fcoe_ddp_min))
750 else if (!(ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)) {
751 fcp = fc_frame_payload_get(fp, sizeof(*fcp));
752 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN &&
753 fcp && (ntohl(fcp->fc_dl) > fcoe_ddp_min) &&
754 (fcp->fc_flags & FCP_CFL_WRDATA))
761 * fcoe_em_config() - Allocate and configure an exchange manager
762 * @lport: The local port that the new EM will be associated with
764 * Returns: 0 on success
766 static inline int fcoe_em_config(struct fc_lport *lport)
768 struct fcoe_port *port = lport_priv(lport);
769 struct fcoe_interface *fcoe = port->priv;
770 struct fcoe_interface *oldfcoe = NULL;
771 struct net_device *old_real_dev, *cur_real_dev;
772 u16 min_xid = FCOE_MIN_XID;
773 u16 max_xid = FCOE_MAX_XID;
776 * Check if need to allocate an em instance for
777 * offload exchange ids to be shared across all VN_PORTs/lport.
779 if (!lport->lro_enabled || !lport->lro_xid ||
780 (lport->lro_xid >= max_xid)) {
786 * Reuse existing offload em instance in case
787 * it is already allocated on real eth device
789 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
790 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
792 cur_real_dev = fcoe->netdev;
794 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
795 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
796 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
798 old_real_dev = oldfcoe->netdev;
800 if (cur_real_dev == old_real_dev) {
801 fcoe->oem = oldfcoe->oem;
807 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
808 printk(KERN_ERR "fcoe_em_config: failed to add "
809 "offload em:%p on interface:%s\n",
810 fcoe->oem, fcoe->netdev->name);
814 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
815 FCOE_MIN_XID, lport->lro_xid,
818 printk(KERN_ERR "fcoe_em_config: failed to allocate "
819 "em for offload exches on interface:%s\n",
826 * Exclude offload EM xid range from next EM xid range.
828 min_xid += lport->lro_xid + 1;
831 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
832 printk(KERN_ERR "fcoe_em_config: failed to "
833 "allocate em on interface %s\n", fcoe->netdev->name);
841 * fcoe_if_destroy() - Tear down a SW FCoE instance
842 * @lport: The local port to be destroyed
845 static void fcoe_if_destroy(struct fc_lport *lport)
847 struct fcoe_port *port = lport_priv(lport);
848 struct fcoe_interface *fcoe = port->priv;
849 struct net_device *netdev = fcoe->netdev;
851 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
853 /* Logout of the fabric */
854 fc_fabric_logoff(lport);
856 /* Cleanup the fc_lport */
857 fc_lport_destroy(lport);
859 /* Stop the transmit retry timer */
860 del_timer_sync(&port->timer);
862 /* Free existing transmit skbs */
863 fcoe_clean_pending_queue(lport);
866 if (!is_zero_ether_addr(port->data_src_addr))
867 dev_uc_del(netdev, port->data_src_addr);
870 /* Release reference held in fcoe_if_create() */
871 fcoe_interface_put(fcoe);
873 /* Free queued packets for the per-CPU receive threads */
874 fcoe_percpu_clean(lport);
876 /* Detach from the scsi-ml */
877 fc_remove_host(lport->host);
878 scsi_remove_host(lport->host);
880 /* Destroy lport scsi_priv */
881 fc_fcp_destroy(lport);
883 /* There are no more rports or I/O, free the EM */
884 fc_exch_mgr_free(lport);
886 /* Free memory used by statistical counters */
887 fc_lport_free_stats(lport);
889 /* Release the Scsi_Host */
890 scsi_host_put(lport->host);
894 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
895 * @lport: The local port to setup DDP for
896 * @xid: The exchange ID for this DDP transfer
897 * @sgl: The scatterlist describing this transfer
898 * @sgc: The number of sg items
900 * Returns: 0 if the DDP context was not configured
902 static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
903 struct scatterlist *sgl, unsigned int sgc)
905 struct net_device *netdev = fcoe_netdev(lport);
907 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
908 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
916 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device
917 * @lport: The local port to setup DDP for
918 * @xid: The exchange ID for this DDP transfer
919 * @sgl: The scatterlist describing this transfer
920 * @sgc: The number of sg items
922 * Returns: 0 if the DDP context was not configured
924 static int fcoe_ddp_target(struct fc_lport *lport, u16 xid,
925 struct scatterlist *sgl, unsigned int sgc)
927 struct net_device *netdev = fcoe_netdev(lport);
929 if (netdev->netdev_ops->ndo_fcoe_ddp_target)
930 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid,
938 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
939 * @lport: The local port to complete DDP on
940 * @xid: The exchange ID for this DDP transfer
942 * Returns: the length of data that have been completed by DDP
944 static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
946 struct net_device *netdev = fcoe_netdev(lport);
948 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
949 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
954 * fcoe_if_create() - Create a FCoE instance on an interface
955 * @fcoe: The FCoE interface to create a local port on
956 * @parent: The device pointer to be the parent in sysfs for the SCSI host
957 * @npiv: Indicates if the port is a vport or not
959 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
961 * Returns: The allocated fc_lport or an error pointer
963 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
964 struct device *parent, int npiv)
966 struct net_device *netdev = fcoe->netdev;
967 struct fc_lport *lport, *n_port;
968 struct fcoe_port *port;
969 struct Scsi_Host *shost;
972 * parent is only a vport if npiv is 1,
973 * but we'll only use vport in that case so go ahead and set it
975 struct fc_vport *vport = dev_to_vport(parent);
977 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
980 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port));
982 lport = libfc_vport_create(vport, sizeof(*port));
985 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
989 port = lport_priv(lport);
992 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH;
993 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH;
994 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
996 /* configure a fc_lport including the exchange manager */
997 rc = fcoe_lport_config(lport);
999 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
1005 FCOE_NETDEV_DBG(netdev, "Setting vport names, "
1006 "%16.16llx %16.16llx\n",
1007 vport->node_name, vport->port_name);
1008 fc_set_wwnn(lport, vport->node_name);
1009 fc_set_wwpn(lport, vport->port_name);
1012 /* configure lport network properties */
1013 rc = fcoe_netdev_config(lport, netdev);
1015 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
1017 goto out_lp_destroy;
1020 /* configure lport scsi host properties */
1021 rc = fcoe_shost_config(lport, parent);
1023 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
1025 goto out_lp_destroy;
1028 /* Initialize the library */
1029 rc = fcoe_libfc_config(lport, &fcoe->ctlr, &fcoe_libfc_fcn_templ, 1);
1031 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
1033 goto out_lp_destroy;
1037 * fcoe_em_alloc() and fcoe_hostlist_add() both
1038 * need to be atomic with respect to other changes to the
1039 * hostlist since fcoe_em_alloc() looks for an existing EM
1040 * instance on host list updated by fcoe_hostlist_add().
1042 * This is currently handled through the fcoe_config_mutex
1046 /* lport exch manager allocation */
1047 rc = fcoe_em_config(lport);
1049 shost = vport_to_shost(vport);
1050 n_port = shost_priv(shost);
1051 rc = fc_exch_mgr_list_clone(n_port, lport);
1055 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n");
1056 goto out_lp_destroy;
1059 fcoe_interface_get(fcoe);
1063 fc_exch_mgr_free(lport);
1065 scsi_host_put(lport->host);
1071 * fcoe_if_init() - Initialization routine for fcoe.ko
1073 * Attaches the SW FCoE transport to the FC transport
1075 * Returns: 0 on success
1077 static int __init fcoe_if_init(void)
1079 /* attach to scsi transport */
1080 fcoe_nport_scsi_transport =
1081 fc_attach_transport(&fcoe_nport_fc_functions);
1082 fcoe_vport_scsi_transport =
1083 fc_attach_transport(&fcoe_vport_fc_functions);
1085 if (!fcoe_nport_scsi_transport) {
1086 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
1094 * fcoe_if_exit() - Tear down fcoe.ko
1096 * Detaches the SW FCoE transport from the FC transport
1098 * Returns: 0 on success
1100 int __exit fcoe_if_exit(void)
1102 fc_release_transport(fcoe_nport_scsi_transport);
1103 fc_release_transport(fcoe_vport_scsi_transport);
1104 fcoe_nport_scsi_transport = NULL;
1105 fcoe_vport_scsi_transport = NULL;
1110 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
1111 * @cpu: The CPU index of the CPU to create a receive thread for
1113 static void fcoe_percpu_thread_create(unsigned int cpu)
1115 struct fcoe_percpu_s *p;
1116 struct task_struct *thread;
1118 p = &per_cpu(fcoe_percpu, cpu);
1120 thread = kthread_create(fcoe_percpu_receive_thread,
1121 (void *)p, "fcoethread/%d", cpu);
1123 if (likely(!IS_ERR(thread))) {
1124 kthread_bind(thread, cpu);
1125 wake_up_process(thread);
1127 spin_lock_bh(&p->fcoe_rx_list.lock);
1129 spin_unlock_bh(&p->fcoe_rx_list.lock);
1134 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1135 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
1137 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1138 * current CPU's Rx thread. If the thread being destroyed is bound to
1139 * the CPU processing this context the skbs will be freed.
1141 static void fcoe_percpu_thread_destroy(unsigned int cpu)
1143 struct fcoe_percpu_s *p;
1144 struct task_struct *thread;
1145 struct page *crc_eof;
1146 struct sk_buff *skb;
1148 struct fcoe_percpu_s *p0;
1149 unsigned targ_cpu = get_cpu();
1150 #endif /* CONFIG_SMP */
1152 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu);
1154 /* Prevent any new skbs from being queued for this CPU. */
1155 p = &per_cpu(fcoe_percpu, cpu);
1156 spin_lock_bh(&p->fcoe_rx_list.lock);
1159 crc_eof = p->crc_eof_page;
1160 p->crc_eof_page = NULL;
1161 p->crc_eof_offset = 0;
1162 spin_unlock_bh(&p->fcoe_rx_list.lock);
1166 * Don't bother moving the skb's if this context is running
1167 * on the same CPU that is having its thread destroyed. This
1168 * can easily happen when the module is removed.
1170 if (cpu != targ_cpu) {
1171 p0 = &per_cpu(fcoe_percpu, targ_cpu);
1172 spin_lock_bh(&p0->fcoe_rx_list.lock);
1174 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1177 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1178 __skb_queue_tail(&p0->fcoe_rx_list, skb);
1179 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1182 * The targeted CPU is not initialized and cannot accept
1183 * new skbs. Unlock the targeted CPU and drop the skbs
1184 * on the CPU that is going offline.
1186 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1188 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1192 * This scenario occurs when the module is being removed
1193 * and all threads are being destroyed. skbs will continue
1194 * to be shifted from the CPU thread that is being removed
1195 * to the CPU thread associated with the CPU that is processing
1196 * the module removal. Once there is only one CPU Rx thread it
1197 * will reach this case and we will drop all skbs and later
1200 spin_lock_bh(&p->fcoe_rx_list.lock);
1201 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1203 spin_unlock_bh(&p->fcoe_rx_list.lock);
1208 * This a non-SMP scenario where the singular Rx thread is
1209 * being removed. Free all skbs and stop the thread.
1211 spin_lock_bh(&p->fcoe_rx_list.lock);
1212 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1214 spin_unlock_bh(&p->fcoe_rx_list.lock);
1218 kthread_stop(thread);
1225 * fcoe_cpu_callback() - Handler for CPU hotplug events
1226 * @nfb: The callback data block
1227 * @action: The event triggering the callback
1228 * @hcpu: The index of the CPU that the event is for
1230 * This creates or destroys per-CPU data for fcoe
1232 * Returns NOTIFY_OK always.
1234 static int fcoe_cpu_callback(struct notifier_block *nfb,
1235 unsigned long action, void *hcpu)
1237 unsigned cpu = (unsigned long)hcpu;
1241 case CPU_ONLINE_FROZEN:
1242 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu);
1243 fcoe_percpu_thread_create(cpu);
1246 case CPU_DEAD_FROZEN:
1247 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu);
1248 fcoe_percpu_thread_destroy(cpu);
1257 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming
1259 * @curr_cpu: CPU which received request
1261 * This routine selects next CPU based on cpumask.
1263 * Returns: int (CPU number). Caller to verify if returned CPU is online or not.
1265 static unsigned int fcoe_select_cpu(unsigned int curr_cpu)
1267 static unsigned int selected_cpu;
1269 if (num_online_cpus() == 1)
1272 * Doing following check, to skip "curr_cpu (smp_processor_id)"
1273 * from selection of CPU is intentional. This is to avoid same CPU
1274 * doing post-processing of command. "curr_cpu" to just receive
1275 * incoming request in case where rx_id is UNKNOWN and all other
1276 * CPU to actually process the command(s)
1279 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask);
1280 if (selected_cpu >= nr_cpu_ids)
1281 selected_cpu = cpumask_first(cpu_online_mask);
1282 } while (selected_cpu == curr_cpu);
1283 return selected_cpu;
1287 * fcoe_rcv() - Receive packets from a net device
1288 * @skb: The received packet
1289 * @netdev: The net device that the packet was received on
1290 * @ptype: The packet type context
1291 * @olddev: The last device net device
1293 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1294 * FC frame and passes the frame to libfc.
1296 * Returns: 0 for success
1298 int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
1299 struct packet_type *ptype, struct net_device *olddev)
1301 struct fc_lport *lport;
1302 struct fcoe_rcv_info *fr;
1303 struct fcoe_interface *fcoe;
1304 struct fc_frame_header *fh;
1305 struct fcoe_percpu_s *fps;
1309 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
1310 lport = fcoe->ctlr.lp;
1311 if (unlikely(!lport)) {
1312 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure");
1315 if (!lport->link_up)
1318 FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p "
1319 "data:%p tail:%p end:%p sum:%d dev:%s",
1320 skb->len, skb->data_len, skb->head, skb->data,
1321 skb_tail_pointer(skb), skb_end_pointer(skb),
1322 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
1326 if (is_fip_mode(&fcoe->ctlr) &&
1327 compare_ether_addr(eh->h_source, fcoe->ctlr.dest_addr)) {
1328 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
1334 * Check for minimum frame length, and make sure required FCoE
1335 * and FC headers are pulled into the linear data area.
1337 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1338 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
1341 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1342 fh = (struct fc_frame_header *) skb_transport_header(skb);
1344 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) {
1345 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n",
1350 fr = fcoe_dev_from_skb(skb);
1355 * In case the incoming frame's exchange is originated from
1356 * the initiator, then received frame's exchange id is ANDed
1357 * with fc_cpu_mask bits to get the same cpu on which exchange
1358 * was originated, otherwise just use the current cpu.
1360 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1361 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
1363 cpu = smp_processor_id();
1365 if ((fh->fh_type == FC_TYPE_FCP) &&
1366 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) {
1368 cpu = fcoe_select_cpu(cpu);
1369 } while (!cpu_online(cpu));
1370 } else if ((fh->fh_type == FC_TYPE_FCP) &&
1371 (ntohs(fh->fh_rx_id) != FC_XID_UNKNOWN)) {
1372 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask;
1374 cpu = smp_processor_id();
1376 fps = &per_cpu(fcoe_percpu, cpu);
1377 spin_lock_bh(&fps->fcoe_rx_list.lock);
1378 if (unlikely(!fps->thread)) {
1380 * The targeted CPU is not ready, let's target
1381 * the first CPU now. For non-SMP systems this
1382 * will check the same CPU twice.
1384 FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread "
1385 "ready for incoming skb- using first online "
1388 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1389 cpu = cpumask_first(cpu_online_mask);
1390 fps = &per_cpu(fcoe_percpu, cpu);
1391 spin_lock_bh(&fps->fcoe_rx_list.lock);
1393 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1399 * We now have a valid CPU that we're targeting for
1400 * this skb. We also have this receive thread locked,
1401 * so we're free to queue skbs into it's queue.
1404 /* If this is a SCSI-FCP frame, and this is already executing on the
1405 * correct CPU, and the queue for this CPU is empty, then go ahead
1406 * and process the frame directly in the softirq context.
1407 * This lets us process completions without context switching from the
1408 * NET_RX softirq, to our receive processing thread, and then back to
1409 * BLOCK softirq context.
1411 if (fh->fh_type == FC_TYPE_FCP &&
1412 cpu == smp_processor_id() &&
1413 skb_queue_empty(&fps->fcoe_rx_list)) {
1414 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1415 fcoe_recv_frame(skb);
1417 __skb_queue_tail(&fps->fcoe_rx_list, skb);
1418 if (fps->fcoe_rx_list.qlen == 1)
1419 wake_up_process(fps->thread);
1420 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1425 per_cpu_ptr(lport->dev_stats, get_cpu())->ErrorFrames++;
1433 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1434 * @skb: The packet to be transmitted
1435 * @tlen: The total length of the trailer
1437 * Returns: 0 for success
1439 static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)
1441 struct fcoe_percpu_s *fps;
1444 fps = &get_cpu_var(fcoe_percpu);
1445 rc = fcoe_get_paged_crc_eof(skb, tlen, fps);
1446 put_cpu_var(fcoe_percpu);
1452 * fcoe_xmit() - Transmit a FCoE frame
1453 * @lport: The local port that the frame is to be transmitted for
1454 * @fp: The frame to be transmitted
1456 * Return: 0 for success
1458 int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
1463 struct fcoe_crc_eof *cp;
1464 struct sk_buff *skb;
1465 struct fcoe_dev_stats *stats;
1466 struct fc_frame_header *fh;
1467 unsigned int hlen; /* header length implies the version */
1468 unsigned int tlen; /* trailer length */
1469 unsigned int elen; /* eth header, may include vlan */
1470 struct fcoe_port *port = lport_priv(lport);
1471 struct fcoe_interface *fcoe = port->priv;
1473 struct fcoe_hdr *hp;
1475 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1477 fh = fc_frame_header_get(fp);
1479 wlen = skb->len / FCOE_WORD_TO_BYTE;
1481 if (!lport->link_up) {
1486 if (unlikely(fh->fh_type == FC_TYPE_ELS) &&
1487 fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb))
1493 elen = sizeof(struct ethhdr);
1494 hlen = sizeof(struct fcoe_hdr);
1495 tlen = sizeof(struct fcoe_crc_eof);
1496 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1499 if (likely(lport->crc_offload)) {
1500 skb->ip_summed = CHECKSUM_PARTIAL;
1501 skb->csum_start = skb_headroom(skb);
1502 skb->csum_offset = skb->len;
1505 skb->ip_summed = CHECKSUM_NONE;
1506 crc = fcoe_fc_crc(fp);
1509 /* copy port crc and eof to the skb buff */
1510 if (skb_is_nonlinear(skb)) {
1512 if (fcoe_alloc_paged_crc_eof(skb, tlen)) {
1516 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1517 cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ)
1518 + frag->page_offset;
1520 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
1523 memset(cp, 0, sizeof(*cp));
1525 cp->fcoe_crc32 = cpu_to_le32(~crc);
1527 if (skb_is_nonlinear(skb)) {
1528 kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ);
1532 /* adjust skb network/transport offsets to match mac/fcoe/port */
1533 skb_push(skb, elen + hlen);
1534 skb_reset_mac_header(skb);
1535 skb_reset_network_header(skb);
1536 skb->mac_len = elen;
1537 skb->protocol = htons(ETH_P_FCOE);
1538 skb->dev = fcoe->netdev;
1540 /* fill up mac and fcoe headers */
1542 eh->h_proto = htons(ETH_P_FCOE);
1543 memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN);
1544 if (fcoe->ctlr.map_dest)
1545 memcpy(eh->h_dest + 3, fh->fh_d_id, 3);
1547 if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN))
1548 memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN);
1550 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
1552 hp = (struct fcoe_hdr *)(eh + 1);
1553 memset(hp, 0, sizeof(*hp));
1555 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1558 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1559 if (lport->seq_offload && fr_max_payload(fp)) {
1560 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1561 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1563 skb_shinfo(skb)->gso_type = 0;
1564 skb_shinfo(skb)->gso_size = 0;
1566 /* update tx stats: regardless if LLD fails */
1567 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1569 stats->TxWords += wlen;
1572 /* send down to lld */
1574 if (port->fcoe_pending_queue.qlen)
1575 fcoe_check_wait_queue(lport, skb);
1576 else if (fcoe_start_io(skb))
1577 fcoe_check_wait_queue(lport, skb);
1583 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1584 * @skb: The completed skb (argument required by destructor)
1586 static void fcoe_percpu_flush_done(struct sk_buff *skb)
1588 complete(&fcoe_flush_completion);
1592 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
1593 * @lport: The local port the frame was received on
1594 * @fp: The received frame
1596 * Return: 0 on passing filtering checks
1598 static inline int fcoe_filter_frames(struct fc_lport *lport,
1599 struct fc_frame *fp)
1601 struct fcoe_interface *fcoe;
1602 struct fc_frame_header *fh;
1603 struct sk_buff *skb = (struct sk_buff *)fp;
1604 struct fcoe_dev_stats *stats;
1607 * We only check CRC if no offload is available and if it is
1608 * it's solicited data, in which case, the FCP layer would
1609 * check it during the copy.
1611 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
1612 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1614 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1616 fh = (struct fc_frame_header *) skb_transport_header(skb);
1617 fh = fc_frame_header_get(fp);
1618 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP)
1621 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;
1622 if (is_fip_mode(&fcoe->ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
1623 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
1624 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1628 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) ||
1629 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) {
1630 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1634 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1635 stats->InvalidCRCCount++;
1636 if (stats->InvalidCRCCount < 5)
1637 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
1642 * fcoe_recv_frame() - process a single received frame
1643 * @skb: frame to process
1645 static void fcoe_recv_frame(struct sk_buff *skb)
1648 struct fc_lport *lport;
1649 struct fcoe_rcv_info *fr;
1650 struct fcoe_dev_stats *stats;
1651 struct fcoe_crc_eof crc_eof;
1652 struct fc_frame *fp;
1653 struct fcoe_port *port;
1654 struct fcoe_hdr *hp;
1656 fr = fcoe_dev_from_skb(skb);
1658 if (unlikely(!lport)) {
1659 if (skb->destructor != fcoe_percpu_flush_done)
1660 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb");
1665 FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d "
1666 "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
1667 skb->len, skb->data_len,
1668 skb->head, skb->data, skb_tail_pointer(skb),
1669 skb_end_pointer(skb), skb->csum,
1670 skb->dev ? skb->dev->name : "<NULL>");
1672 port = lport_priv(lport);
1673 if (skb_is_nonlinear(skb))
1674 skb_linearize(skb); /* not ideal */
1677 * Frame length checks and setting up the header pointers
1678 * was done in fcoe_rcv already.
1680 hp = (struct fcoe_hdr *) skb_network_header(skb);
1682 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1683 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1684 if (stats->ErrorFrames < 5)
1685 printk(KERN_WARNING "fcoe: FCoE version "
1686 "mismatch: The frame has "
1687 "version %x, but the "
1688 "initiator supports version "
1689 "%x\n", FC_FCOE_DECAPS_VER(hp),
1694 skb_pull(skb, sizeof(struct fcoe_hdr));
1695 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1698 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1700 fp = (struct fc_frame *)skb;
1703 fr_sof(fp) = hp->fcoe_sof;
1705 /* Copy out the CRC and EOF trailer for access */
1706 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof)))
1708 fr_eof(fp) = crc_eof.fcoe_eof;
1709 fr_crc(fp) = crc_eof.fcoe_crc32;
1710 if (pskb_trim(skb, fr_len))
1713 if (!fcoe_filter_frames(lport, fp)) {
1715 fc_exch_recv(lport, fp);
1719 stats->ErrorFrames++;
1725 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1726 * @arg: The per-CPU context
1728 * Return: 0 for success
1730 int fcoe_percpu_receive_thread(void *arg)
1732 struct fcoe_percpu_s *p = arg;
1733 struct sk_buff *skb;
1735 set_user_nice(current, -20);
1737 while (!kthread_should_stop()) {
1739 spin_lock_bh(&p->fcoe_rx_list.lock);
1740 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) {
1741 set_current_state(TASK_INTERRUPTIBLE);
1742 spin_unlock_bh(&p->fcoe_rx_list.lock);
1744 set_current_state(TASK_RUNNING);
1745 if (kthread_should_stop())
1747 spin_lock_bh(&p->fcoe_rx_list.lock);
1749 spin_unlock_bh(&p->fcoe_rx_list.lock);
1750 fcoe_recv_frame(skb);
1756 * fcoe_dev_setup() - Setup the link change notification interface
1758 static void fcoe_dev_setup(void)
1760 register_netdevice_notifier(&fcoe_notifier);
1764 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1766 static void fcoe_dev_cleanup(void)
1768 unregister_netdevice_notifier(&fcoe_notifier);
1772 * fcoe_device_notification() - Handler for net device events
1773 * @notifier: The context of the notification
1774 * @event: The type of event
1775 * @ptr: The net device that the event was on
1777 * This function is called by the Ethernet driver in case of link change event.
1779 * Returns: 0 for success
1781 static int fcoe_device_notification(struct notifier_block *notifier,
1782 ulong event, void *ptr)
1784 struct fc_lport *lport = NULL;
1785 struct net_device *netdev = ptr;
1786 struct fcoe_interface *fcoe;
1787 struct fcoe_port *port;
1788 struct fcoe_dev_stats *stats;
1789 u32 link_possible = 1;
1793 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1794 if (fcoe->netdev == netdev) {
1795 lport = fcoe->ctlr.lp;
1806 case NETDEV_GOING_DOWN:
1812 case NETDEV_CHANGEMTU:
1813 if (netdev->features & NETIF_F_FCOE_MTU)
1815 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
1816 sizeof(struct fcoe_crc_eof));
1817 if (mfs >= FC_MIN_MAX_FRAME)
1818 fc_set_mfs(lport, mfs);
1820 case NETDEV_REGISTER:
1822 case NETDEV_UNREGISTER:
1823 list_del(&fcoe->list);
1824 port = lport_priv(fcoe->ctlr.lp);
1825 queue_work(fcoe_wq, &port->destroy_work);
1828 case NETDEV_FEAT_CHANGE:
1829 fcoe_netdev_features_change(lport, netdev);
1832 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
1833 "from netdev netlink\n", event);
1836 fcoe_link_speed_update(lport);
1838 if (link_possible && !fcoe_link_ok(lport))
1839 fcoe_ctlr_link_up(&fcoe->ctlr);
1840 else if (fcoe_ctlr_link_down(&fcoe->ctlr)) {
1841 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1842 stats->LinkFailureCount++;
1844 fcoe_clean_pending_queue(lport);
1851 * fcoe_disable() - Disables a FCoE interface
1852 * @netdev : The net_device object the Ethernet interface to create on
1854 * Called from fcoe transport.
1856 * Returns: 0 for success
1858 static int fcoe_disable(struct net_device *netdev)
1860 struct fcoe_interface *fcoe;
1863 mutex_lock(&fcoe_config_mutex);
1866 fcoe = fcoe_hostlist_lookup_port(netdev);
1870 fcoe_ctlr_link_down(&fcoe->ctlr);
1871 fcoe_clean_pending_queue(fcoe->ctlr.lp);
1875 mutex_unlock(&fcoe_config_mutex);
1880 * fcoe_enable() - Enables a FCoE interface
1881 * @netdev : The net_device object the Ethernet interface to create on
1883 * Called from fcoe transport.
1885 * Returns: 0 for success
1887 static int fcoe_enable(struct net_device *netdev)
1889 struct fcoe_interface *fcoe;
1892 mutex_lock(&fcoe_config_mutex);
1894 fcoe = fcoe_hostlist_lookup_port(netdev);
1899 else if (!fcoe_link_ok(fcoe->ctlr.lp))
1900 fcoe_ctlr_link_up(&fcoe->ctlr);
1902 mutex_unlock(&fcoe_config_mutex);
1907 * fcoe_destroy() - Destroy a FCoE interface
1908 * @netdev : The net_device object the Ethernet interface to create on
1910 * Called from fcoe transport
1912 * Returns: 0 for success
1914 static int fcoe_destroy(struct net_device *netdev)
1916 struct fcoe_interface *fcoe;
1917 struct fc_lport *lport;
1918 struct fcoe_port *port;
1921 mutex_lock(&fcoe_config_mutex);
1923 fcoe = fcoe_hostlist_lookup_port(netdev);
1928 lport = fcoe->ctlr.lp;
1929 port = lport_priv(lport);
1930 list_del(&fcoe->list);
1931 queue_work(fcoe_wq, &port->destroy_work);
1934 mutex_unlock(&fcoe_config_mutex);
1939 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
1940 * @work: Handle to the FCoE port to be destroyed
1942 static void fcoe_destroy_work(struct work_struct *work)
1944 struct fcoe_port *port;
1945 struct fcoe_interface *fcoe;
1948 port = container_of(work, struct fcoe_port, destroy_work);
1949 mutex_lock(&fcoe_config_mutex);
1951 /* set if this is an NPIV port */
1952 npiv = port->lport->vport ? 1 : 0;
1955 fcoe_if_destroy(port->lport);
1957 /* Do not tear down the fcoe interface for NPIV port */
1960 fcoe_interface_cleanup(fcoe);
1964 mutex_unlock(&fcoe_config_mutex);
1968 * fcoe_match() - Check if the FCoE is supported on the given netdevice
1969 * @netdev : The net_device object the Ethernet interface to create on
1971 * Called from fcoe transport.
1973 * Returns: always returns true as this is the default FCoE transport,
1974 * i.e., support all netdevs.
1976 static bool fcoe_match(struct net_device *netdev)
1982 * fcoe_create() - Create a fcoe interface
1983 * @netdev : The net_device object the Ethernet interface to create on
1984 * @fip_mode: The FIP mode for this creation
1986 * Called from fcoe transport
1988 * Returns: 0 for success
1990 static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode)
1993 struct fcoe_interface *fcoe;
1994 struct fc_lport *lport;
1996 mutex_lock(&fcoe_config_mutex);
1999 /* look for existing lport */
2000 if (fcoe_hostlist_lookup(netdev)) {
2005 fcoe = fcoe_interface_create(netdev, fip_mode);
2011 lport = fcoe_if_create(fcoe, &netdev->dev, 0);
2012 if (IS_ERR(lport)) {
2013 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
2016 fcoe_interface_cleanup(fcoe);
2020 /* Make this the "master" N_Port */
2021 fcoe->ctlr.lp = lport;
2023 /* add to lports list */
2024 fcoe_hostlist_add(lport);
2026 /* start FIP Discovery and FLOGI */
2027 lport->boot_time = jiffies;
2028 fc_fabric_login(lport);
2029 if (!fcoe_link_ok(lport))
2030 fcoe_ctlr_link_up(&fcoe->ctlr);
2034 mutex_unlock(&fcoe_config_mutex);
2039 * fcoe_link_speed_update() - Update the supported and actual link speeds
2040 * @lport: The local port to update speeds for
2042 * Returns: 0 if the ethtool query was successful
2043 * -1 if the ethtool query failed
2045 int fcoe_link_speed_update(struct fc_lport *lport)
2047 struct net_device *netdev = fcoe_netdev(lport);
2048 struct ethtool_cmd ecmd;
2050 if (!dev_ethtool_get_settings(netdev, &ecmd)) {
2051 lport->link_supported_speeds &=
2052 ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
2053 if (ecmd.supported & (SUPPORTED_1000baseT_Half |
2054 SUPPORTED_1000baseT_Full))
2055 lport->link_supported_speeds |= FC_PORTSPEED_1GBIT;
2056 if (ecmd.supported & SUPPORTED_10000baseT_Full)
2057 lport->link_supported_speeds |=
2058 FC_PORTSPEED_10GBIT;
2059 switch (ethtool_cmd_speed(&ecmd)) {
2061 lport->link_speed = FC_PORTSPEED_1GBIT;
2064 lport->link_speed = FC_PORTSPEED_10GBIT;
2073 * fcoe_link_ok() - Check if the link is OK for a local port
2074 * @lport: The local port to check link on
2076 * Returns: 0 if link is UP and OK, -1 if not
2079 int fcoe_link_ok(struct fc_lport *lport)
2081 struct net_device *netdev = fcoe_netdev(lport);
2083 if (netif_oper_up(netdev))
2089 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2090 * @lport: The local port whose skbs are to be cleared
2092 * Must be called with fcoe_create_mutex held to single-thread completion.
2094 * This flushes the pending skbs by adding a new skb to each queue and
2095 * waiting until they are all freed. This assures us that not only are
2096 * there no packets that will be handled by the lport, but also that any
2097 * threads already handling packet have returned.
2099 void fcoe_percpu_clean(struct fc_lport *lport)
2101 struct fcoe_percpu_s *pp;
2102 struct fcoe_rcv_info *fr;
2103 struct sk_buff_head *list;
2104 struct sk_buff *skb, *next;
2105 struct sk_buff *head;
2108 for_each_possible_cpu(cpu) {
2109 pp = &per_cpu(fcoe_percpu, cpu);
2110 spin_lock_bh(&pp->fcoe_rx_list.lock);
2111 list = &pp->fcoe_rx_list;
2113 for (skb = head; skb != (struct sk_buff *)list;
2116 fr = fcoe_dev_from_skb(skb);
2117 if (fr->fr_dev == lport) {
2118 __skb_unlink(skb, list);
2123 if (!pp->thread || !cpu_online(cpu)) {
2124 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2128 skb = dev_alloc_skb(0);
2130 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2133 skb->destructor = fcoe_percpu_flush_done;
2135 __skb_queue_tail(&pp->fcoe_rx_list, skb);
2136 if (pp->fcoe_rx_list.qlen == 1)
2137 wake_up_process(pp->thread);
2138 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2140 wait_for_completion(&fcoe_flush_completion);
2145 * fcoe_reset() - Reset a local port
2146 * @shost: The SCSI host associated with the local port to be reset
2148 * Returns: Always 0 (return value required by FC transport template)
2150 int fcoe_reset(struct Scsi_Host *shost)
2152 struct fc_lport *lport = shost_priv(shost);
2153 struct fcoe_port *port = lport_priv(lport);
2154 struct fcoe_interface *fcoe = port->priv;
2156 fcoe_ctlr_link_down(&fcoe->ctlr);
2157 fcoe_clean_pending_queue(fcoe->ctlr.lp);
2158 if (!fcoe_link_ok(fcoe->ctlr.lp))
2159 fcoe_ctlr_link_up(&fcoe->ctlr);
2164 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2165 * @netdev: The net device used as a key
2167 * Locking: Must be called with the RNL mutex held.
2169 * Returns: NULL or the FCoE interface
2171 static struct fcoe_interface *
2172 fcoe_hostlist_lookup_port(const struct net_device *netdev)
2174 struct fcoe_interface *fcoe;
2176 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
2177 if (fcoe->netdev == netdev)
2184 * fcoe_hostlist_lookup() - Find the local port associated with a
2186 * @netdev: The netdevice used as a key
2188 * Locking: Must be called with the RTNL mutex held
2190 * Returns: NULL or the local port
2192 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
2194 struct fcoe_interface *fcoe;
2196 fcoe = fcoe_hostlist_lookup_port(netdev);
2197 return (fcoe) ? fcoe->ctlr.lp : NULL;
2201 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2202 * port to the hostlist
2203 * @lport: The local port that identifies the FCoE interface to be added
2205 * Locking: must be called with the RTNL mutex held
2207 * Returns: 0 for success
2209 static int fcoe_hostlist_add(const struct fc_lport *lport)
2211 struct fcoe_interface *fcoe;
2212 struct fcoe_port *port;
2214 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2216 port = lport_priv(lport);
2218 list_add_tail(&fcoe->list, &fcoe_hostlist);
2224 static struct fcoe_transport fcoe_sw_transport = {
2225 .name = {FCOE_TRANSPORT_DEFAULT},
2227 .list = LIST_HEAD_INIT(fcoe_sw_transport.list),
2228 .match = fcoe_match,
2229 .create = fcoe_create,
2230 .destroy = fcoe_destroy,
2231 .enable = fcoe_enable,
2232 .disable = fcoe_disable,
2236 * fcoe_init() - Initialize fcoe.ko
2238 * Returns: 0 on success, or a negative value on failure
2240 static int __init fcoe_init(void)
2242 struct fcoe_percpu_s *p;
2246 fcoe_wq = alloc_workqueue("fcoe", 0, 0);
2250 /* register as a fcoe transport */
2251 rc = fcoe_transport_attach(&fcoe_sw_transport);
2253 printk(KERN_ERR "failed to register an fcoe transport, check "
2254 "if libfcoe is loaded\n");
2258 mutex_lock(&fcoe_config_mutex);
2260 for_each_possible_cpu(cpu) {
2261 p = &per_cpu(fcoe_percpu, cpu);
2262 skb_queue_head_init(&p->fcoe_rx_list);
2265 for_each_online_cpu(cpu)
2266 fcoe_percpu_thread_create(cpu);
2268 /* Initialize per CPU interrupt thread */
2269 rc = register_hotcpu_notifier(&fcoe_cpu_notifier);
2273 /* Setup link change notification */
2276 rc = fcoe_if_init();
2280 mutex_unlock(&fcoe_config_mutex);
2284 for_each_online_cpu(cpu) {
2285 fcoe_percpu_thread_destroy(cpu);
2287 mutex_unlock(&fcoe_config_mutex);
2288 destroy_workqueue(fcoe_wq);
2291 module_init(fcoe_init);
2294 * fcoe_exit() - Clean up fcoe.ko
2296 * Returns: 0 on success or a negative value on failure
2298 static void __exit fcoe_exit(void)
2300 struct fcoe_interface *fcoe, *tmp;
2301 struct fcoe_port *port;
2304 mutex_lock(&fcoe_config_mutex);
2308 /* releases the associated fcoe hosts */
2310 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
2311 list_del(&fcoe->list);
2312 port = lport_priv(fcoe->ctlr.lp);
2313 queue_work(fcoe_wq, &port->destroy_work);
2317 unregister_hotcpu_notifier(&fcoe_cpu_notifier);
2319 for_each_online_cpu(cpu)
2320 fcoe_percpu_thread_destroy(cpu);
2322 mutex_unlock(&fcoe_config_mutex);
2325 * destroy_work's may be chained but destroy_workqueue()
2326 * can take care of them. Just kill the fcoe_wq.
2328 destroy_workqueue(fcoe_wq);
2331 * Detaching from the scsi transport must happen after all
2332 * destroys are done on the fcoe_wq. destroy_workqueue will
2333 * enusre the fcoe_wq is flushed.
2337 /* detach from fcoe transport */
2338 fcoe_transport_detach(&fcoe_sw_transport);
2340 module_exit(fcoe_exit);
2343 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2344 * @seq: active sequence in the FLOGI or FDISC exchange
2345 * @fp: response frame, or error encoded in a pointer (timeout)
2346 * @arg: pointer the the fcoe_ctlr structure
2348 * This handles MAC address management for FCoE, then passes control on to
2349 * the libfc FLOGI response handler.
2351 static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2353 struct fcoe_ctlr *fip = arg;
2354 struct fc_exch *exch = fc_seq_exch(seq);
2355 struct fc_lport *lport = exch->lp;
2361 mac = fr_cb(fp)->granted_mac;
2362 if (is_zero_ether_addr(mac)) {
2364 if (fcoe_ctlr_recv_flogi(fip, lport, fp)) {
2369 fcoe_update_src_mac(lport, mac);
2371 fc_lport_flogi_resp(seq, fp, lport);
2375 * fcoe_logo_resp() - FCoE specific LOGO response handler
2376 * @seq: active sequence in the LOGO exchange
2377 * @fp: response frame, or error encoded in a pointer (timeout)
2378 * @arg: pointer the the fcoe_ctlr structure
2380 * This handles MAC address management for FCoE, then passes control on to
2381 * the libfc LOGO response handler.
2383 static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2385 struct fc_lport *lport = arg;
2386 static u8 zero_mac[ETH_ALEN] = { 0 };
2389 fcoe_update_src_mac(lport, zero_mac);
2390 fc_lport_logo_resp(seq, fp, lport);
2394 * fcoe_elsct_send - FCoE specific ELS handler
2396 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2397 * using FCoE specific response handlers and passing the FIP controller as
2398 * the argument (the lport is still available from the exchange).
2400 * Most of the work here is just handed off to the libfc routine.
2402 static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2403 struct fc_frame *fp, unsigned int op,
2404 void (*resp)(struct fc_seq *,
2407 void *arg, u32 timeout)
2409 struct fcoe_port *port = lport_priv(lport);
2410 struct fcoe_interface *fcoe = port->priv;
2411 struct fcoe_ctlr *fip = &fcoe->ctlr;
2412 struct fc_frame_header *fh = fc_frame_header_get(fp);
2417 if (lport->point_to_multipoint)
2419 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2422 /* only hook onto fabric logouts, not port logouts */
2423 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2425 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
2428 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2432 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2433 * @vport: fc_vport object to create a new fc_host for
2434 * @disabled: start the new fc_host in a disabled state by default?
2436 * Returns: 0 for success
2438 static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2440 struct Scsi_Host *shost = vport_to_shost(vport);
2441 struct fc_lport *n_port = shost_priv(shost);
2442 struct fcoe_port *port = lport_priv(n_port);
2443 struct fcoe_interface *fcoe = port->priv;
2444 struct net_device *netdev = fcoe->netdev;
2445 struct fc_lport *vn_port;
2449 rc = fcoe_validate_vport_create(vport);
2451 wwn_to_str(vport->port_name, buf, sizeof(buf));
2452 printk(KERN_ERR "fcoe: Failed to create vport, "
2453 "WWPN (0x%s) already exists\n",
2458 mutex_lock(&fcoe_config_mutex);
2459 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
2460 mutex_unlock(&fcoe_config_mutex);
2462 if (IS_ERR(vn_port)) {
2463 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2469 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2471 vn_port->boot_time = jiffies;
2472 fc_fabric_login(vn_port);
2473 fc_vport_setlink(vn_port);
2479 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2480 * @vport: fc_vport object that is being destroyed
2482 * Returns: 0 for success
2484 static int fcoe_vport_destroy(struct fc_vport *vport)
2486 struct Scsi_Host *shost = vport_to_shost(vport);
2487 struct fc_lport *n_port = shost_priv(shost);
2488 struct fc_lport *vn_port = vport->dd_data;
2489 struct fcoe_port *port = lport_priv(vn_port);
2491 mutex_lock(&n_port->lp_mutex);
2492 list_del(&vn_port->list);
2493 mutex_unlock(&n_port->lp_mutex);
2494 queue_work(fcoe_wq, &port->destroy_work);
2499 * fcoe_vport_disable() - change vport state
2500 * @vport: vport to bring online/offline
2501 * @disable: should the vport be disabled?
2503 static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2505 struct fc_lport *lport = vport->dd_data;
2508 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2509 fc_fabric_logoff(lport);
2511 lport->boot_time = jiffies;
2512 fc_fabric_login(lport);
2513 fc_vport_setlink(lport);
2520 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2521 * @vport: fc_vport with a new symbolic name string
2523 * After generating a new symbolic name string, a new RSPN_ID request is
2524 * sent to the name server. There is no response handler, so if it fails
2525 * for some reason it will not be retried.
2527 static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2529 struct fc_lport *lport = vport->dd_data;
2530 struct fc_frame *fp;
2533 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2534 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2535 fcoe_netdev(lport)->name, vport->symbolic_name);
2537 if (lport->state != LPORT_ST_READY)
2540 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2541 fp = fc_frame_alloc(lport,
2542 sizeof(struct fc_ct_hdr) +
2543 sizeof(struct fc_ns_rspn) + len);
2546 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
2547 NULL, NULL, 3 * lport->r_a_tov);
2551 * fcoe_get_lesb() - Fill the FCoE Link Error Status Block
2552 * @lport: the local port
2553 * @fc_lesb: the link error status block
2555 static void fcoe_get_lesb(struct fc_lport *lport,
2556 struct fc_els_lesb *fc_lesb)
2559 u32 lfc, vlfc, mdac;
2560 struct fcoe_dev_stats *devst;
2561 struct fcoe_fc_els_lesb *lesb;
2562 struct rtnl_link_stats64 temp;
2563 struct net_device *netdev = fcoe_netdev(lport);
2568 lesb = (struct fcoe_fc_els_lesb *)fc_lesb;
2569 memset(lesb, 0, sizeof(*lesb));
2570 for_each_possible_cpu(cpu) {
2571 devst = per_cpu_ptr(lport->dev_stats, cpu);
2572 lfc += devst->LinkFailureCount;
2573 vlfc += devst->VLinkFailureCount;
2574 mdac += devst->MissDiscAdvCount;
2576 lesb->lesb_link_fail = htonl(lfc);
2577 lesb->lesb_vlink_fail = htonl(vlfc);
2578 lesb->lesb_miss_fka = htonl(mdac);
2579 lesb->lesb_fcs_error = htonl(dev_get_stats(netdev, &temp)->rx_crc_errors);
2583 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2584 * @lport: the local port
2585 * @port_id: the port ID
2586 * @fp: the received frame, if any, that caused the port_id to be set.
2588 * This routine handles the case where we received a FLOGI and are
2589 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2590 * so it can set the non-mapped mode and gateway address.
2592 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2594 static void fcoe_set_port_id(struct fc_lport *lport,
2595 u32 port_id, struct fc_frame *fp)
2597 struct fcoe_port *port = lport_priv(lport);
2598 struct fcoe_interface *fcoe = port->priv;
2600 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
2601 fcoe_ctlr_recv_flogi(&fcoe->ctlr, lport, fp);
2605 * fcoe_validate_vport_create() - Validate a vport before creating it
2606 * @vport: NPIV port to be created
2608 * This routine is meant to add validation for a vport before creating it
2609 * via fcoe_vport_create().
2610 * Current validations are:
2611 * - WWPN supplied is unique for given lport
2615 static int fcoe_validate_vport_create(struct fc_vport *vport)
2617 struct Scsi_Host *shost = vport_to_shost(vport);
2618 struct fc_lport *n_port = shost_priv(shost);
2619 struct fc_lport *vn_port;
2623 mutex_lock(&n_port->lp_mutex);
2625 wwn_to_str(vport->port_name, buf, sizeof(buf));
2626 /* Check if the wwpn is not same as that of the lport */
2627 if (!memcmp(&n_port->wwpn, &vport->port_name, sizeof(u64))) {
2628 FCOE_DBG("vport WWPN 0x%s is same as that of the "
2629 "base port WWPN\n", buf);
2634 /* Check if there is any existing vport with same wwpn */
2635 list_for_each_entry(vn_port, &n_port->vports, list) {
2636 if (!memcmp(&vn_port->wwpn, &vport->port_name, sizeof(u64))) {
2637 FCOE_DBG("vport with given WWPN 0x%s already "
2645 mutex_unlock(&n_port->lp_mutex);