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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>
30#include <linux/fs.h>
31#include <linux/sysfs.h>
32#include <linux/ctype.h>
33#include <linux/workqueue.h>
34#include <net/dcbnl.h>
35#include <net/dcbevent.h>
36#include <scsi/scsi_tcq.h>
37#include <scsi/scsicam.h>
38#include <scsi/scsi_transport.h>
39#include <scsi/scsi_transport_fc.h>
40#include <net/rtnetlink.h>
41
42#include <scsi/fc/fc_encaps.h>
43#include <scsi/fc/fc_fip.h>
44#include <scsi/fc/fc_fcoe.h>
45
46#include <scsi/libfc.h>
47#include <scsi/fc_frame.h>
48#include <scsi/libfcoe.h>
49
50#include "fcoe.h"
51
52MODULE_AUTHOR("Open-FCoE.org");
53MODULE_DESCRIPTION("FCoE");
54MODULE_LICENSE("GPL v2");
55
56
57static unsigned int fcoe_ddp_min = 4096;
58module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR);
59MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \
60 "Direct Data Placement (DDP).");
61
62unsigned int fcoe_debug_logging;
63module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR);
64MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
65
66static DEFINE_MUTEX(fcoe_config_mutex);
67
68static struct workqueue_struct *fcoe_wq;
69
70
71static DECLARE_COMPLETION(fcoe_flush_completion);
72
73
74
75static LIST_HEAD(fcoe_hostlist);
76static DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
77
78
79static int fcoe_reset(struct Scsi_Host *);
80static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
81static int fcoe_rcv(struct sk_buff *, struct net_device *,
82 struct packet_type *, struct net_device *);
83static int fcoe_percpu_receive_thread(void *);
84static void fcoe_percpu_clean(struct fc_lport *);
85static int fcoe_link_ok(struct fc_lport *);
86
87static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
88static int fcoe_hostlist_add(const struct fc_lport *);
89static void fcoe_hostlist_del(const struct fc_lport *);
90
91static int fcoe_device_notification(struct notifier_block *, ulong, void *);
92static void fcoe_dev_setup(void);
93static void fcoe_dev_cleanup(void);
94static struct fcoe_interface
95*fcoe_hostlist_lookup_port(const struct net_device *);
96
97static int fcoe_fip_recv(struct sk_buff *, struct net_device *,
98 struct packet_type *, struct net_device *);
99
100static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *);
101static void fcoe_update_src_mac(struct fc_lport *, u8 *);
102static u8 *fcoe_get_src_mac(struct fc_lport *);
103static void fcoe_destroy_work(struct work_struct *);
104
105static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *,
106 unsigned int);
107static int fcoe_ddp_done(struct fc_lport *, u16);
108static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *,
109 unsigned int);
110static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *);
111static int fcoe_dcb_app_notification(struct notifier_block *notifier,
112 ulong event, void *ptr);
113
114static bool fcoe_match(struct net_device *netdev);
115static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode);
116static int fcoe_destroy(struct net_device *netdev);
117static int fcoe_enable(struct net_device *netdev);
118static int fcoe_disable(struct net_device *netdev);
119
120
121static int fcoe_ctlr_alloc(struct net_device *netdev);
122static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev);
123
124
125static struct fc_seq *fcoe_elsct_send(struct fc_lport *,
126 u32 did, struct fc_frame *,
127 unsigned int op,
128 void (*resp)(struct fc_seq *,
129 struct fc_frame *,
130 void *),
131 void *, u32 timeout);
132static void fcoe_recv_frame(struct sk_buff *skb);
133
134
135static struct notifier_block fcoe_notifier = {
136 .notifier_call = fcoe_device_notification,
137};
138
139
140static struct notifier_block fcoe_cpu_notifier = {
141 .notifier_call = fcoe_cpu_callback,
142};
143
144
145static struct notifier_block dcb_notifier = {
146 .notifier_call = fcoe_dcb_app_notification,
147};
148
149static struct scsi_transport_template *fcoe_nport_scsi_transport;
150static struct scsi_transport_template *fcoe_vport_scsi_transport;
151
152static int fcoe_vport_destroy(struct fc_vport *);
153static int fcoe_vport_create(struct fc_vport *, bool disabled);
154static int fcoe_vport_disable(struct fc_vport *, bool disable);
155static void fcoe_set_vport_symbolic_name(struct fc_vport *);
156static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *);
157static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *);
158
159static struct fcoe_sysfs_function_template fcoe_sysfs_templ = {
160 .set_fcoe_ctlr_mode = fcoe_ctlr_set_fip_mode,
161 .set_fcoe_ctlr_enabled = fcoe_ctlr_enabled,
162 .get_fcoe_ctlr_link_fail = fcoe_ctlr_get_lesb,
163 .get_fcoe_ctlr_vlink_fail = fcoe_ctlr_get_lesb,
164 .get_fcoe_ctlr_miss_fka = fcoe_ctlr_get_lesb,
165 .get_fcoe_ctlr_symb_err = fcoe_ctlr_get_lesb,
166 .get_fcoe_ctlr_err_block = fcoe_ctlr_get_lesb,
167 .get_fcoe_ctlr_fcs_error = fcoe_ctlr_get_lesb,
168
169 .get_fcoe_fcf_selected = fcoe_fcf_get_selected,
170 .get_fcoe_fcf_vlan_id = fcoe_fcf_get_vlan_id,
171};
172
173static struct libfc_function_template fcoe_libfc_fcn_templ = {
174 .frame_send = fcoe_xmit,
175 .ddp_setup = fcoe_ddp_setup,
176 .ddp_done = fcoe_ddp_done,
177 .ddp_target = fcoe_ddp_target,
178 .elsct_send = fcoe_elsct_send,
179 .get_lesb = fcoe_get_lesb,
180 .lport_set_port_id = fcoe_set_port_id,
181};
182
183static struct fc_function_template fcoe_nport_fc_functions = {
184 .show_host_node_name = 1,
185 .show_host_port_name = 1,
186 .show_host_supported_classes = 1,
187 .show_host_supported_fc4s = 1,
188 .show_host_active_fc4s = 1,
189 .show_host_maxframe_size = 1,
190 .show_host_serial_number = 1,
191 .show_host_manufacturer = 1,
192 .show_host_model = 1,
193 .show_host_model_description = 1,
194 .show_host_hardware_version = 1,
195 .show_host_driver_version = 1,
196 .show_host_firmware_version = 1,
197 .show_host_optionrom_version = 1,
198
199 .show_host_port_id = 1,
200 .show_host_supported_speeds = 1,
201 .get_host_speed = fc_get_host_speed,
202 .show_host_speed = 1,
203 .show_host_port_type = 1,
204 .get_host_port_state = fc_get_host_port_state,
205 .show_host_port_state = 1,
206 .show_host_symbolic_name = 1,
207
208 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
209 .show_rport_maxframe_size = 1,
210 .show_rport_supported_classes = 1,
211
212 .show_host_fabric_name = 1,
213 .show_starget_node_name = 1,
214 .show_starget_port_name = 1,
215 .show_starget_port_id = 1,
216 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
217 .show_rport_dev_loss_tmo = 1,
218 .get_fc_host_stats = fc_get_host_stats,
219 .issue_fc_host_lip = fcoe_reset,
220
221 .terminate_rport_io = fc_rport_terminate_io,
222
223 .vport_create = fcoe_vport_create,
224 .vport_delete = fcoe_vport_destroy,
225 .vport_disable = fcoe_vport_disable,
226 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
227
228 .bsg_request = fc_lport_bsg_request,
229};
230
231static struct fc_function_template fcoe_vport_fc_functions = {
232 .show_host_node_name = 1,
233 .show_host_port_name = 1,
234 .show_host_supported_classes = 1,
235 .show_host_supported_fc4s = 1,
236 .show_host_active_fc4s = 1,
237 .show_host_maxframe_size = 1,
238 .show_host_serial_number = 1,
239 .show_host_manufacturer = 1,
240 .show_host_model = 1,
241 .show_host_model_description = 1,
242 .show_host_hardware_version = 1,
243 .show_host_driver_version = 1,
244 .show_host_firmware_version = 1,
245 .show_host_optionrom_version = 1,
246
247 .show_host_port_id = 1,
248 .show_host_supported_speeds = 1,
249 .get_host_speed = fc_get_host_speed,
250 .show_host_speed = 1,
251 .show_host_port_type = 1,
252 .get_host_port_state = fc_get_host_port_state,
253 .show_host_port_state = 1,
254 .show_host_symbolic_name = 1,
255
256 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
257 .show_rport_maxframe_size = 1,
258 .show_rport_supported_classes = 1,
259
260 .show_host_fabric_name = 1,
261 .show_starget_node_name = 1,
262 .show_starget_port_name = 1,
263 .show_starget_port_id = 1,
264 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
265 .show_rport_dev_loss_tmo = 1,
266 .get_fc_host_stats = fc_get_host_stats,
267 .issue_fc_host_lip = fcoe_reset,
268
269 .terminate_rport_io = fc_rport_terminate_io,
270
271 .bsg_request = fc_lport_bsg_request,
272};
273
274static struct scsi_host_template fcoe_shost_template = {
275 .module = THIS_MODULE,
276 .name = "FCoE Driver",
277 .proc_name = FCOE_NAME,
278 .queuecommand = fc_queuecommand,
279 .eh_abort_handler = fc_eh_abort,
280 .eh_device_reset_handler = fc_eh_device_reset,
281 .eh_host_reset_handler = fc_eh_host_reset,
282 .slave_alloc = fc_slave_alloc,
283 .change_queue_depth = scsi_change_queue_depth,
284 .this_id = -1,
285 .cmd_per_lun = 3,
286 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
287 .use_clustering = ENABLE_CLUSTERING,
288 .sg_tablesize = SG_ALL,
289 .max_sectors = 0xffff,
290 .use_blk_tags = 1,
291 .track_queue_depth = 1,
292};
293
294
295
296
297
298
299
300
301
302static int fcoe_interface_setup(struct fcoe_interface *fcoe,
303 struct net_device *netdev)
304{
305 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
306 struct netdev_hw_addr *ha;
307 struct net_device *real_dev;
308 u8 flogi_maddr[ETH_ALEN];
309 const struct net_device_ops *ops;
310
311 fcoe->netdev = netdev;
312
313
314 ops = netdev->netdev_ops;
315 if (ops->ndo_fcoe_enable) {
316 if (ops->ndo_fcoe_enable(netdev))
317 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
318 " specific feature for LLD.\n");
319 }
320
321
322 if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) {
323 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
324 return -EOPNOTSUPP;
325 }
326
327
328
329 real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ?
330 vlan_dev_real_dev(netdev) : netdev;
331 fcoe->realdev = real_dev;
332 rcu_read_lock();
333 for_each_dev_addr(real_dev, ha) {
334 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
335 (is_valid_ether_addr(ha->addr))) {
336 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
337 fip->spma = 1;
338 break;
339 }
340 }
341 rcu_read_unlock();
342
343
344 if (!fip->spma)
345 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
346
347
348
349
350
351
352 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
353 dev_uc_add(netdev, flogi_maddr);
354 if (fip->spma)
355 dev_uc_add(netdev, fip->ctl_src_addr);
356 if (fip->mode == FIP_MODE_VN2VN) {
357 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS);
358 dev_mc_add(netdev, FIP_ALL_P2P_MACS);
359 } else
360 dev_mc_add(netdev, FIP_ALL_ENODE_MACS);
361
362
363
364
365
366 fcoe->fcoe_packet_type.func = fcoe_rcv;
367 fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
368 fcoe->fcoe_packet_type.dev = netdev;
369 dev_add_pack(&fcoe->fcoe_packet_type);
370
371 fcoe->fip_packet_type.func = fcoe_fip_recv;
372 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
373 fcoe->fip_packet_type.dev = netdev;
374 dev_add_pack(&fcoe->fip_packet_type);
375
376 return 0;
377}
378
379
380
381
382
383
384
385
386static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
387 enum fip_state fip_mode)
388{
389 struct fcoe_ctlr_device *ctlr_dev;
390 struct fcoe_ctlr *ctlr;
391 struct fcoe_interface *fcoe;
392 int size;
393 int err;
394
395 if (!try_module_get(THIS_MODULE)) {
396 FCOE_NETDEV_DBG(netdev,
397 "Could not get a reference to the module\n");
398 fcoe = ERR_PTR(-EBUSY);
399 goto out;
400 }
401
402 size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface);
403 ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ,
404 size);
405 if (!ctlr_dev) {
406 FCOE_DBG("Failed to add fcoe_ctlr_device\n");
407 fcoe = ERR_PTR(-ENOMEM);
408 goto out_putmod;
409 }
410
411 ctlr = fcoe_ctlr_device_priv(ctlr_dev);
412 ctlr->cdev = ctlr_dev;
413 fcoe = fcoe_ctlr_priv(ctlr);
414
415 dev_hold(netdev);
416
417
418
419
420 fcoe_ctlr_init(ctlr, fip_mode);
421 ctlr->send = fcoe_fip_send;
422 ctlr->update_mac = fcoe_update_src_mac;
423 ctlr->get_src_addr = fcoe_get_src_mac;
424
425 err = fcoe_interface_setup(fcoe, netdev);
426 if (err) {
427 fcoe_ctlr_destroy(ctlr);
428 fcoe_ctlr_device_delete(ctlr_dev);
429 dev_put(netdev);
430 fcoe = ERR_PTR(err);
431 goto out_putmod;
432 }
433
434 goto out;
435
436out_putmod:
437 module_put(THIS_MODULE);
438out:
439 return fcoe;
440}
441
442
443
444
445
446
447
448static void fcoe_interface_remove(struct fcoe_interface *fcoe)
449{
450 struct net_device *netdev = fcoe->netdev;
451 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
452 u8 flogi_maddr[ETH_ALEN];
453 const struct net_device_ops *ops;
454
455
456
457
458
459
460
461 __dev_remove_pack(&fcoe->fcoe_packet_type);
462 __dev_remove_pack(&fcoe->fip_packet_type);
463 synchronize_net();
464
465
466 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
467 dev_uc_del(netdev, flogi_maddr);
468 if (fip->spma)
469 dev_uc_del(netdev, fip->ctl_src_addr);
470 if (fip->mode == FIP_MODE_VN2VN) {
471 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);
472 dev_mc_del(netdev, FIP_ALL_P2P_MACS);
473 } else
474 dev_mc_del(netdev, FIP_ALL_ENODE_MACS);
475
476
477 ops = netdev->netdev_ops;
478 if (ops->ndo_fcoe_disable) {
479 if (ops->ndo_fcoe_disable(netdev))
480 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
481 " specific feature for LLD.\n");
482 }
483 fcoe->removed = 1;
484}
485
486
487
488
489
490
491static void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
492{
493 struct net_device *netdev = fcoe->netdev;
494 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
495
496 rtnl_lock();
497 if (!fcoe->removed)
498 fcoe_interface_remove(fcoe);
499 rtnl_unlock();
500
501
502
503 fcoe_ctlr_destroy(fip);
504 scsi_host_put(fip->lp->host);
505 dev_put(netdev);
506 module_put(THIS_MODULE);
507}
508
509
510
511
512
513
514
515
516
517
518
519static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
520 struct packet_type *ptype,
521 struct net_device *orig_dev)
522{
523 struct fcoe_interface *fcoe;
524 struct fcoe_ctlr *ctlr;
525
526 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
527 ctlr = fcoe_to_ctlr(fcoe);
528 fcoe_ctlr_recv(ctlr, skb);
529 return 0;
530}
531
532
533
534
535
536
537static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb)
538{
539 if (port->fcoe_pending_queue.qlen)
540 fcoe_check_wait_queue(port->lport, skb);
541 else if (fcoe_start_io(skb))
542 fcoe_check_wait_queue(port->lport, skb);
543}
544
545
546
547
548
549
550static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
551{
552 skb->dev = fcoe_from_ctlr(fip)->netdev;
553 fcoe_port_send(lport_priv(fip->lp), skb);
554}
555
556
557
558
559
560
561
562
563
564static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
565{
566 struct fcoe_port *port = lport_priv(lport);
567 struct fcoe_interface *fcoe = port->priv;
568
569 if (!is_zero_ether_addr(port->data_src_addr))
570 dev_uc_del(fcoe->netdev, port->data_src_addr);
571 if (!is_zero_ether_addr(addr))
572 dev_uc_add(fcoe->netdev, addr);
573 memcpy(port->data_src_addr, addr, ETH_ALEN);
574}
575
576
577
578
579
580static u8 *fcoe_get_src_mac(struct fc_lport *lport)
581{
582 struct fcoe_port *port = lport_priv(lport);
583
584 return port->data_src_addr;
585}
586
587
588
589
590
591
592
593static int fcoe_lport_config(struct fc_lport *lport)
594{
595 lport->link_up = 0;
596 lport->qfull = 0;
597 lport->max_retry_count = 3;
598 lport->max_rport_retry_count = 3;
599 lport->e_d_tov = 2 * 1000;
600 lport->r_a_tov = 2 * 2 * 1000;
601 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
602 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
603 lport->does_npiv = 1;
604
605 fc_lport_init_stats(lport);
606
607
608 fc_lport_config(lport);
609
610
611 lport->crc_offload = 0;
612 lport->seq_offload = 0;
613 lport->lro_enabled = 0;
614 lport->lro_xid = 0;
615 lport->lso_max = 0;
616
617 return 0;
618}
619
620
621
622
623
624static void fcoe_netdev_features_change(struct fc_lport *lport,
625 struct net_device *netdev)
626{
627 mutex_lock(&lport->lp_mutex);
628
629 if (netdev->features & NETIF_F_SG)
630 lport->sg_supp = 1;
631 else
632 lport->sg_supp = 0;
633
634 if (netdev->features & NETIF_F_FCOE_CRC) {
635 lport->crc_offload = 1;
636 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
637 } else {
638 lport->crc_offload = 0;
639 }
640
641 if (netdev->features & NETIF_F_FSO) {
642 lport->seq_offload = 1;
643 lport->lso_max = netdev->gso_max_size;
644 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
645 lport->lso_max);
646 } else {
647 lport->seq_offload = 0;
648 lport->lso_max = 0;
649 }
650
651 if (netdev->fcoe_ddp_xid) {
652 lport->lro_enabled = 1;
653 lport->lro_xid = netdev->fcoe_ddp_xid;
654 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
655 lport->lro_xid);
656 } else {
657 lport->lro_enabled = 0;
658 lport->lro_xid = 0;
659 }
660
661 mutex_unlock(&lport->lp_mutex);
662}
663
664
665
666
667
668
669
670
671
672
673static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
674{
675 u32 mfs;
676 u64 wwnn, wwpn;
677 struct fcoe_interface *fcoe;
678 struct fcoe_ctlr *ctlr;
679 struct fcoe_port *port;
680
681
682 port = lport_priv(lport);
683 fcoe = port->priv;
684 ctlr = fcoe_to_ctlr(fcoe);
685
686
687
688
689
690
691 mfs = netdev->mtu;
692 if (netdev->features & NETIF_F_FCOE_MTU) {
693 mfs = FCOE_MTU;
694 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
695 }
696 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
697 if (fc_set_mfs(lport, mfs))
698 return -EINVAL;
699
700
701 fcoe_netdev_features_change(lport, netdev);
702
703 skb_queue_head_init(&port->fcoe_pending_queue);
704 port->fcoe_pending_queue_active = 0;
705 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
706
707 fcoe_link_speed_update(lport);
708
709 if (!lport->vport) {
710 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
711 wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0);
712 fc_set_wwnn(lport, wwnn);
713 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
714 wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr,
715 2, 0);
716 fc_set_wwpn(lport, wwpn);
717 }
718
719 return 0;
720}
721
722
723
724
725
726
727
728
729
730
731static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)
732{
733 int rc = 0;
734
735
736 lport->host->max_lun = FCOE_MAX_LUN;
737 lport->host->max_id = FCOE_MAX_FCP_TARGET;
738 lport->host->max_channel = 0;
739 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;
740
741 if (lport->vport)
742 lport->host->transportt = fcoe_vport_scsi_transport;
743 else
744 lport->host->transportt = fcoe_nport_scsi_transport;
745
746
747 rc = scsi_add_host(lport->host, dev);
748 if (rc) {
749 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
750 "error on scsi_add_host\n");
751 return rc;
752 }
753
754 if (!lport->vport)
755 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
756
757 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
758 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
759 fcoe_netdev(lport)->name);
760
761 return 0;
762}
763
764
765
766
767
768
769
770
771
772
773static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev)
774{
775 struct fcoe_interface *fcoe;
776 struct fcoe_port *port;
777 struct net_device *realdev;
778 int rc;
779
780 port = lport_priv(lport);
781 fcoe = port->priv;
782 realdev = fcoe->realdev;
783
784 if (!realdev)
785 return;
786
787
788 if (lport->vport)
789 return;
790
791 if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) {
792 struct netdev_fcoe_hbainfo *fdmi;
793 fdmi = kzalloc(sizeof(*fdmi), GFP_KERNEL);
794 if (!fdmi)
795 return;
796
797 rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev,
798 fdmi);
799 if (rc) {
800 printk(KERN_INFO "fcoe: Failed to retrieve FDMI "
801 "information from netdev.\n");
802 return;
803 }
804
805 snprintf(fc_host_serial_number(lport->host),
806 FC_SERIAL_NUMBER_SIZE,
807 "%s",
808 fdmi->serial_number);
809 snprintf(fc_host_manufacturer(lport->host),
810 FC_SERIAL_NUMBER_SIZE,
811 "%s",
812 fdmi->manufacturer);
813 snprintf(fc_host_model(lport->host),
814 FC_SYMBOLIC_NAME_SIZE,
815 "%s",
816 fdmi->model);
817 snprintf(fc_host_model_description(lport->host),
818 FC_SYMBOLIC_NAME_SIZE,
819 "%s",
820 fdmi->model_description);
821 snprintf(fc_host_hardware_version(lport->host),
822 FC_VERSION_STRING_SIZE,
823 "%s",
824 fdmi->hardware_version);
825 snprintf(fc_host_driver_version(lport->host),
826 FC_VERSION_STRING_SIZE,
827 "%s",
828 fdmi->driver_version);
829 snprintf(fc_host_optionrom_version(lport->host),
830 FC_VERSION_STRING_SIZE,
831 "%s",
832 fdmi->optionrom_version);
833 snprintf(fc_host_firmware_version(lport->host),
834 FC_VERSION_STRING_SIZE,
835 "%s",
836 fdmi->firmware_version);
837
838
839 lport->fdmi_enabled = 1;
840 kfree(fdmi);
841 } else {
842 lport->fdmi_enabled = 0;
843 printk(KERN_INFO "fcoe: No FDMI support.\n");
844 }
845}
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865static bool fcoe_oem_match(struct fc_frame *fp)
866{
867 struct fc_frame_header *fh = fc_frame_header_get(fp);
868 struct fcp_cmnd *fcp;
869
870 if (fc_fcp_is_read(fr_fsp(fp)) &&
871 (fr_fsp(fp)->data_len > fcoe_ddp_min))
872 return true;
873 else if ((fr_fsp(fp) == NULL) &&
874 (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) &&
875 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) {
876 fcp = fc_frame_payload_get(fp, sizeof(*fcp));
877 if ((fcp->fc_flags & FCP_CFL_WRDATA) &&
878 (ntohl(fcp->fc_dl) > fcoe_ddp_min))
879 return true;
880 }
881 return false;
882}
883
884
885
886
887
888
889
890static inline int fcoe_em_config(struct fc_lport *lport)
891{
892 struct fcoe_port *port = lport_priv(lport);
893 struct fcoe_interface *fcoe = port->priv;
894 struct fcoe_interface *oldfcoe = NULL;
895 struct net_device *old_real_dev, *cur_real_dev;
896 u16 min_xid = FCOE_MIN_XID;
897 u16 max_xid = FCOE_MAX_XID;
898
899
900
901
902
903 if (!lport->lro_enabled || !lport->lro_xid ||
904 (lport->lro_xid >= max_xid)) {
905 lport->lro_xid = 0;
906 goto skip_oem;
907 }
908
909
910
911
912
913 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
914 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
915 else
916 cur_real_dev = fcoe->netdev;
917
918 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
919 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
920 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
921 else
922 old_real_dev = oldfcoe->netdev;
923
924 if (cur_real_dev == old_real_dev) {
925 fcoe->oem = oldfcoe->oem;
926 break;
927 }
928 }
929
930 if (fcoe->oem) {
931 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
932 printk(KERN_ERR "fcoe_em_config: failed to add "
933 "offload em:%p on interface:%s\n",
934 fcoe->oem, fcoe->netdev->name);
935 return -ENOMEM;
936 }
937 } else {
938 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
939 FCOE_MIN_XID, lport->lro_xid,
940 fcoe_oem_match);
941 if (!fcoe->oem) {
942 printk(KERN_ERR "fcoe_em_config: failed to allocate "
943 "em for offload exches on interface:%s\n",
944 fcoe->netdev->name);
945 return -ENOMEM;
946 }
947 }
948
949
950
951
952 min_xid += lport->lro_xid + 1;
953
954skip_oem:
955 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
956 printk(KERN_ERR "fcoe_em_config: failed to "
957 "allocate em on interface %s\n", fcoe->netdev->name);
958 return -ENOMEM;
959 }
960
961 return 0;
962}
963
964
965
966
967
968
969static void fcoe_if_destroy(struct fc_lport *lport)
970{
971 struct fcoe_port *port = lport_priv(lport);
972 struct fcoe_interface *fcoe = port->priv;
973 struct net_device *netdev = fcoe->netdev;
974
975 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
976
977
978 fc_fabric_logoff(lport);
979
980
981 fc_lport_destroy(lport);
982
983
984 del_timer_sync(&port->timer);
985
986
987 fcoe_clean_pending_queue(lport);
988
989 rtnl_lock();
990 if (!is_zero_ether_addr(port->data_src_addr))
991 dev_uc_del(netdev, port->data_src_addr);
992 if (lport->vport)
993 synchronize_net();
994 else
995 fcoe_interface_remove(fcoe);
996 rtnl_unlock();
997
998
999 fcoe_percpu_clean(lport);
1000
1001
1002 fc_remove_host(lport->host);
1003 scsi_remove_host(lport->host);
1004
1005
1006 fc_fcp_destroy(lport);
1007
1008
1009 fc_exch_mgr_free(lport);
1010
1011
1012 fc_lport_free_stats(lport);
1013
1014
1015
1016
1017
1018 if (lport->vport)
1019 scsi_host_put(lport->host);
1020}
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
1032 struct scatterlist *sgl, unsigned int sgc)
1033{
1034 struct net_device *netdev = fcoe_netdev(lport);
1035
1036 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
1037 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
1038 xid, sgl,
1039 sgc);
1040
1041 return 0;
1042}
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053static int fcoe_ddp_target(struct fc_lport *lport, u16 xid,
1054 struct scatterlist *sgl, unsigned int sgc)
1055{
1056 struct net_device *netdev = fcoe_netdev(lport);
1057
1058 if (netdev->netdev_ops->ndo_fcoe_ddp_target)
1059 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid,
1060 sgl, sgc);
1061
1062 return 0;
1063}
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
1074{
1075 struct net_device *netdev = fcoe_netdev(lport);
1076
1077 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
1078 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
1079 return 0;
1080}
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
1093 struct device *parent, int npiv)
1094{
1095 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
1096 struct net_device *netdev = fcoe->netdev;
1097 struct fc_lport *lport, *n_port;
1098 struct fcoe_port *port;
1099 struct Scsi_Host *shost;
1100 int rc;
1101
1102
1103
1104
1105 struct fc_vport *vport = dev_to_vport(parent);
1106
1107 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
1108
1109 if (!npiv)
1110 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port));
1111 else
1112 lport = libfc_vport_create(vport, sizeof(*port));
1113
1114 if (!lport) {
1115 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
1116 rc = -ENOMEM;
1117 goto out;
1118 }
1119 port = lport_priv(lport);
1120 port->lport = lport;
1121 port->priv = fcoe;
1122 port->get_netdev = fcoe_netdev;
1123 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH;
1124 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH;
1125 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
1126
1127
1128
1129
1130
1131 fcoe_hostlist_add(lport);
1132
1133
1134 rc = fcoe_lport_config(lport);
1135 if (rc) {
1136 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
1137 "interface\n");
1138 goto out_host_put;
1139 }
1140
1141 if (npiv) {
1142 FCOE_NETDEV_DBG(netdev, "Setting vport names, "
1143 "%16.16llx %16.16llx\n",
1144 vport->node_name, vport->port_name);
1145 fc_set_wwnn(lport, vport->node_name);
1146 fc_set_wwpn(lport, vport->port_name);
1147 }
1148
1149
1150 rc = fcoe_netdev_config(lport, netdev);
1151 if (rc) {
1152 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
1153 "interface\n");
1154 goto out_lp_destroy;
1155 }
1156
1157
1158 rc = fcoe_shost_config(lport, parent);
1159 if (rc) {
1160 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
1161 "interface\n");
1162 goto out_lp_destroy;
1163 }
1164
1165
1166 rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1);
1167 if (rc) {
1168 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
1169 "interface\n");
1170 goto out_lp_destroy;
1171 }
1172
1173
1174 fcoe_fdmi_info(lport, netdev);
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185 if (!npiv)
1186
1187 rc = fcoe_em_config(lport);
1188 else {
1189 shost = vport_to_shost(vport);
1190 n_port = shost_priv(shost);
1191 rc = fc_exch_mgr_list_clone(n_port, lport);
1192 }
1193
1194 if (rc) {
1195 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n");
1196 goto out_lp_destroy;
1197 }
1198
1199 return lport;
1200
1201out_lp_destroy:
1202 fc_exch_mgr_free(lport);
1203out_host_put:
1204 fcoe_hostlist_del(lport);
1205 scsi_host_put(lport->host);
1206out:
1207 return ERR_PTR(rc);
1208}
1209
1210
1211
1212
1213
1214
1215
1216
1217static int __init fcoe_if_init(void)
1218{
1219
1220 fcoe_nport_scsi_transport =
1221 fc_attach_transport(&fcoe_nport_fc_functions);
1222 fcoe_vport_scsi_transport =
1223 fc_attach_transport(&fcoe_vport_fc_functions);
1224
1225 if (!fcoe_nport_scsi_transport) {
1226 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
1227 return -ENODEV;
1228 }
1229
1230 return 0;
1231}
1232
1233
1234
1235
1236
1237
1238
1239
1240static int __exit fcoe_if_exit(void)
1241{
1242 fc_release_transport(fcoe_nport_scsi_transport);
1243 fc_release_transport(fcoe_vport_scsi_transport);
1244 fcoe_nport_scsi_transport = NULL;
1245 fcoe_vport_scsi_transport = NULL;
1246 return 0;
1247}
1248
1249
1250
1251
1252
1253static void fcoe_percpu_thread_create(unsigned int cpu)
1254{
1255 struct fcoe_percpu_s *p;
1256 struct task_struct *thread;
1257
1258 p = &per_cpu(fcoe_percpu, cpu);
1259
1260 thread = kthread_create_on_node(fcoe_percpu_receive_thread,
1261 (void *)p, cpu_to_node(cpu),
1262 "fcoethread/%d", cpu);
1263
1264 if (likely(!IS_ERR(thread))) {
1265 kthread_bind(thread, cpu);
1266 wake_up_process(thread);
1267
1268 spin_lock_bh(&p->fcoe_rx_list.lock);
1269 p->thread = thread;
1270 spin_unlock_bh(&p->fcoe_rx_list.lock);
1271 }
1272}
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282static void fcoe_percpu_thread_destroy(unsigned int cpu)
1283{
1284 struct fcoe_percpu_s *p;
1285 struct task_struct *thread;
1286 struct page *crc_eof;
1287 struct sk_buff *skb;
1288#ifdef CONFIG_SMP
1289 struct fcoe_percpu_s *p0;
1290 unsigned targ_cpu = get_cpu();
1291#endif
1292
1293 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu);
1294
1295
1296 p = &per_cpu(fcoe_percpu, cpu);
1297 spin_lock_bh(&p->fcoe_rx_list.lock);
1298 thread = p->thread;
1299 p->thread = NULL;
1300 crc_eof = p->crc_eof_page;
1301 p->crc_eof_page = NULL;
1302 p->crc_eof_offset = 0;
1303 spin_unlock_bh(&p->fcoe_rx_list.lock);
1304
1305#ifdef CONFIG_SMP
1306
1307
1308
1309
1310
1311 if (cpu != targ_cpu) {
1312 p0 = &per_cpu(fcoe_percpu, targ_cpu);
1313 spin_lock_bh(&p0->fcoe_rx_list.lock);
1314 if (p0->thread) {
1315 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1316 cpu, targ_cpu);
1317
1318 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1319 __skb_queue_tail(&p0->fcoe_rx_list, skb);
1320 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1321 } else {
1322
1323
1324
1325
1326
1327 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1328 kfree_skb(skb);
1329 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1330 }
1331 } else {
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341 spin_lock_bh(&p->fcoe_rx_list.lock);
1342 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1343 kfree_skb(skb);
1344 spin_unlock_bh(&p->fcoe_rx_list.lock);
1345 }
1346 put_cpu();
1347#else
1348
1349
1350
1351
1352 spin_lock_bh(&p->fcoe_rx_list.lock);
1353 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1354 kfree_skb(skb);
1355 spin_unlock_bh(&p->fcoe_rx_list.lock);
1356#endif
1357
1358 if (thread)
1359 kthread_stop(thread);
1360
1361 if (crc_eof)
1362 put_page(crc_eof);
1363}
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375static int fcoe_cpu_callback(struct notifier_block *nfb,
1376 unsigned long action, void *hcpu)
1377{
1378 unsigned cpu = (unsigned long)hcpu;
1379
1380 switch (action) {
1381 case CPU_ONLINE:
1382 case CPU_ONLINE_FROZEN:
1383 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu);
1384 fcoe_percpu_thread_create(cpu);
1385 break;
1386 case CPU_DEAD:
1387 case CPU_DEAD_FROZEN:
1388 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu);
1389 fcoe_percpu_thread_destroy(cpu);
1390 break;
1391 default:
1392 break;
1393 }
1394 return NOTIFY_OK;
1395}
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406static inline unsigned int fcoe_select_cpu(void)
1407{
1408 static unsigned int selected_cpu;
1409
1410 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask);
1411 if (selected_cpu >= nr_cpu_ids)
1412 selected_cpu = cpumask_first(cpu_online_mask);
1413
1414 return selected_cpu;
1415}
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
1430 struct packet_type *ptype, struct net_device *olddev)
1431{
1432 struct fc_lport *lport;
1433 struct fcoe_rcv_info *fr;
1434 struct fcoe_ctlr *ctlr;
1435 struct fcoe_interface *fcoe;
1436 struct fc_frame_header *fh;
1437 struct fcoe_percpu_s *fps;
1438 struct ethhdr *eh;
1439 unsigned int cpu;
1440
1441 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
1442 ctlr = fcoe_to_ctlr(fcoe);
1443 lport = ctlr->lp;
1444 if (unlikely(!lport)) {
1445 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n");
1446 goto err2;
1447 }
1448 if (!lport->link_up)
1449 goto err2;
1450
1451 FCOE_NETDEV_DBG(netdev,
1452 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
1453 skb->len, skb->data_len, skb->head, skb->data,
1454 skb_tail_pointer(skb), skb_end_pointer(skb),
1455 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
1456
1457
1458 skb = skb_share_check(skb, GFP_ATOMIC);
1459
1460 if (skb == NULL)
1461 return NET_RX_DROP;
1462
1463 eh = eth_hdr(skb);
1464
1465 if (is_fip_mode(ctlr) &&
1466 !ether_addr_equal(eh->h_source, ctlr->dest_addr)) {
1467 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
1468 eh->h_source);
1469 goto err;
1470 }
1471
1472
1473
1474
1475
1476 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1477 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
1478 goto err;
1479
1480 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1481 fh = (struct fc_frame_header *) skb_transport_header(skb);
1482
1483 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) {
1484 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n",
1485 eh->h_dest);
1486 goto err;
1487 }
1488
1489 fr = fcoe_dev_from_skb(skb);
1490 fr->fr_dev = lport;
1491
1492
1493
1494
1495
1496
1497
1498
1499 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1500 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
1501 else {
1502 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)
1503 cpu = fcoe_select_cpu();
1504 else
1505 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask;
1506 }
1507
1508 if (cpu >= nr_cpu_ids)
1509 goto err;
1510
1511 fps = &per_cpu(fcoe_percpu, cpu);
1512 spin_lock(&fps->fcoe_rx_list.lock);
1513 if (unlikely(!fps->thread)) {
1514
1515
1516
1517
1518
1519 FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread "
1520 "ready for incoming skb- using first online "
1521 "CPU.\n");
1522
1523 spin_unlock(&fps->fcoe_rx_list.lock);
1524 cpu = cpumask_first(cpu_online_mask);
1525 fps = &per_cpu(fcoe_percpu, cpu);
1526 spin_lock(&fps->fcoe_rx_list.lock);
1527 if (!fps->thread) {
1528 spin_unlock(&fps->fcoe_rx_list.lock);
1529 goto err;
1530 }
1531 }
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546 __skb_queue_tail(&fps->fcoe_rx_list, skb);
1547 if (fps->thread->state == TASK_INTERRUPTIBLE)
1548 wake_up_process(fps->thread);
1549 spin_unlock(&fps->fcoe_rx_list.lock);
1550
1551 return NET_RX_SUCCESS;
1552err:
1553 per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++;
1554 put_cpu();
1555err2:
1556 kfree_skb(skb);
1557 return NET_RX_DROP;
1558}
1559
1560
1561
1562
1563
1564
1565
1566
1567static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)
1568{
1569 struct fcoe_percpu_s *fps;
1570 int rc;
1571
1572 fps = &get_cpu_var(fcoe_percpu);
1573 rc = fcoe_get_paged_crc_eof(skb, tlen, fps);
1574 put_cpu_var(fcoe_percpu);
1575
1576 return rc;
1577}
1578
1579
1580
1581
1582
1583
1584
1585
1586static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
1587{
1588 int wlen;
1589 u32 crc;
1590 struct ethhdr *eh;
1591 struct fcoe_crc_eof *cp;
1592 struct sk_buff *skb;
1593 struct fc_stats *stats;
1594 struct fc_frame_header *fh;
1595 unsigned int hlen;
1596 unsigned int tlen;
1597 unsigned int elen;
1598 struct fcoe_port *port = lport_priv(lport);
1599 struct fcoe_interface *fcoe = port->priv;
1600 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
1601 u8 sof, eof;
1602 struct fcoe_hdr *hp;
1603
1604 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1605
1606 fh = fc_frame_header_get(fp);
1607 skb = fp_skb(fp);
1608 wlen = skb->len / FCOE_WORD_TO_BYTE;
1609
1610 if (!lport->link_up) {
1611 kfree_skb(skb);
1612 return 0;
1613 }
1614
1615 if (unlikely(fh->fh_type == FC_TYPE_ELS) &&
1616 fcoe_ctlr_els_send(ctlr, lport, skb))
1617 return 0;
1618
1619 sof = fr_sof(fp);
1620 eof = fr_eof(fp);
1621
1622 elen = sizeof(struct ethhdr);
1623 hlen = sizeof(struct fcoe_hdr);
1624 tlen = sizeof(struct fcoe_crc_eof);
1625 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1626
1627
1628 if (likely(lport->crc_offload)) {
1629 skb->ip_summed = CHECKSUM_UNNECESSARY;
1630 skb->csum_start = skb_headroom(skb);
1631 skb->csum_offset = skb->len;
1632 crc = 0;
1633 } else {
1634 skb->ip_summed = CHECKSUM_NONE;
1635 crc = fcoe_fc_crc(fp);
1636 }
1637
1638
1639 if (skb_is_nonlinear(skb)) {
1640 skb_frag_t *frag;
1641 if (fcoe_alloc_paged_crc_eof(skb, tlen)) {
1642 kfree_skb(skb);
1643 return -ENOMEM;
1644 }
1645 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1646 cp = kmap_atomic(skb_frag_page(frag))
1647 + frag->page_offset;
1648 } else {
1649 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
1650 }
1651
1652 memset(cp, 0, sizeof(*cp));
1653 cp->fcoe_eof = eof;
1654 cp->fcoe_crc32 = cpu_to_le32(~crc);
1655
1656 if (skb_is_nonlinear(skb)) {
1657 kunmap_atomic(cp);
1658 cp = NULL;
1659 }
1660
1661
1662 skb_push(skb, elen + hlen);
1663 skb_reset_mac_header(skb);
1664 skb_reset_network_header(skb);
1665 skb->mac_len = elen;
1666 skb->protocol = htons(ETH_P_FCOE);
1667 skb->priority = fcoe->priority;
1668
1669 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN &&
1670 fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) {
1671
1672 skb->dev = fcoe->realdev;
1673 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1674 vlan_dev_vlan_id(fcoe->netdev));
1675 } else
1676 skb->dev = fcoe->netdev;
1677
1678
1679 eh = eth_hdr(skb);
1680 eh->h_proto = htons(ETH_P_FCOE);
1681 memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN);
1682 if (ctlr->map_dest)
1683 memcpy(eh->h_dest + 3, fh->fh_d_id, 3);
1684
1685 if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN))
1686 memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN);
1687 else
1688 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
1689
1690 hp = (struct fcoe_hdr *)(eh + 1);
1691 memset(hp, 0, sizeof(*hp));
1692 if (FC_FCOE_VER)
1693 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1694 hp->fcoe_sof = sof;
1695
1696
1697 if (lport->seq_offload && fr_max_payload(fp)) {
1698 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1699 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1700 } else {
1701 skb_shinfo(skb)->gso_type = 0;
1702 skb_shinfo(skb)->gso_size = 0;
1703 }
1704
1705 stats = per_cpu_ptr(lport->stats, get_cpu());
1706 stats->TxFrames++;
1707 stats->TxWords += wlen;
1708 put_cpu();
1709
1710
1711 fr_dev(fp) = lport;
1712 fcoe_port_send(port, skb);
1713 return 0;
1714}
1715
1716
1717
1718
1719
1720static void fcoe_percpu_flush_done(struct sk_buff *skb)
1721{
1722 complete(&fcoe_flush_completion);
1723}
1724
1725
1726
1727
1728
1729
1730
1731
1732static inline int fcoe_filter_frames(struct fc_lport *lport,
1733 struct fc_frame *fp)
1734{
1735 struct fcoe_ctlr *ctlr;
1736 struct fcoe_interface *fcoe;
1737 struct fc_frame_header *fh;
1738 struct sk_buff *skb = (struct sk_buff *)fp;
1739 struct fc_stats *stats;
1740
1741
1742
1743
1744
1745
1746 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
1747 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1748 else
1749 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1750
1751 fh = (struct fc_frame_header *) skb_transport_header(skb);
1752 fh = fc_frame_header_get(fp);
1753 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP)
1754 return 0;
1755
1756 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;
1757 ctlr = fcoe_to_ctlr(fcoe);
1758 if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
1759 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
1760 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1761 return -EINVAL;
1762 }
1763
1764 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) ||
1765 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) {
1766 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1767 return 0;
1768 }
1769
1770 stats = per_cpu_ptr(lport->stats, get_cpu());
1771 stats->InvalidCRCCount++;
1772 if (stats->InvalidCRCCount < 5)
1773 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
1774 put_cpu();
1775 return -EINVAL;
1776}
1777
1778
1779
1780
1781
1782static void fcoe_recv_frame(struct sk_buff *skb)
1783{
1784 u32 fr_len;
1785 struct fc_lport *lport;
1786 struct fcoe_rcv_info *fr;
1787 struct fc_stats *stats;
1788 struct fcoe_crc_eof crc_eof;
1789 struct fc_frame *fp;
1790 struct fcoe_port *port;
1791 struct fcoe_hdr *hp;
1792
1793 fr = fcoe_dev_from_skb(skb);
1794 lport = fr->fr_dev;
1795 if (unlikely(!lport)) {
1796 if (skb->destructor != fcoe_percpu_flush_done)
1797 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n");
1798 kfree_skb(skb);
1799 return;
1800 }
1801
1802 FCOE_NETDEV_DBG(skb->dev,
1803 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
1804 skb->len, skb->data_len,
1805 skb->head, skb->data, skb_tail_pointer(skb),
1806 skb_end_pointer(skb), skb->csum,
1807 skb->dev ? skb->dev->name : "<NULL>");
1808
1809 port = lport_priv(lport);
1810 skb_linearize(skb);
1811
1812
1813
1814
1815
1816 hp = (struct fcoe_hdr *) skb_network_header(skb);
1817
1818 stats = per_cpu_ptr(lport->stats, get_cpu());
1819 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1820 if (stats->ErrorFrames < 5)
1821 printk(KERN_WARNING "fcoe: FCoE version "
1822 "mismatch: The frame has "
1823 "version %x, but the "
1824 "initiator supports version "
1825 "%x\n", FC_FCOE_DECAPS_VER(hp),
1826 FC_FCOE_VER);
1827 goto drop;
1828 }
1829
1830 skb_pull(skb, sizeof(struct fcoe_hdr));
1831 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1832
1833 stats->RxFrames++;
1834 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1835
1836 fp = (struct fc_frame *)skb;
1837 fc_frame_init(fp);
1838 fr_dev(fp) = lport;
1839 fr_sof(fp) = hp->fcoe_sof;
1840
1841
1842 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof)))
1843 goto drop;
1844 fr_eof(fp) = crc_eof.fcoe_eof;
1845 fr_crc(fp) = crc_eof.fcoe_crc32;
1846 if (pskb_trim(skb, fr_len))
1847 goto drop;
1848
1849 if (!fcoe_filter_frames(lport, fp)) {
1850 put_cpu();
1851 fc_exch_recv(lport, fp);
1852 return;
1853 }
1854drop:
1855 stats->ErrorFrames++;
1856 put_cpu();
1857 kfree_skb(skb);
1858}
1859
1860
1861
1862
1863
1864
1865
1866static int fcoe_percpu_receive_thread(void *arg)
1867{
1868 struct fcoe_percpu_s *p = arg;
1869 struct sk_buff *skb;
1870 struct sk_buff_head tmp;
1871
1872 skb_queue_head_init(&tmp);
1873
1874 set_user_nice(current, MIN_NICE);
1875
1876retry:
1877 while (!kthread_should_stop()) {
1878
1879 spin_lock_bh(&p->fcoe_rx_list.lock);
1880 skb_queue_splice_init(&p->fcoe_rx_list, &tmp);
1881
1882 if (!skb_queue_len(&tmp)) {
1883 set_current_state(TASK_INTERRUPTIBLE);
1884 spin_unlock_bh(&p->fcoe_rx_list.lock);
1885 schedule();
1886 goto retry;
1887 }
1888
1889 spin_unlock_bh(&p->fcoe_rx_list.lock);
1890
1891 while ((skb = __skb_dequeue(&tmp)) != NULL)
1892 fcoe_recv_frame(skb);
1893
1894 }
1895 return 0;
1896}
1897
1898
1899
1900
1901static void fcoe_dev_setup(void)
1902{
1903 register_dcbevent_notifier(&dcb_notifier);
1904 register_netdevice_notifier(&fcoe_notifier);
1905}
1906
1907
1908
1909
1910static void fcoe_dev_cleanup(void)
1911{
1912 unregister_dcbevent_notifier(&dcb_notifier);
1913 unregister_netdevice_notifier(&fcoe_notifier);
1914}
1915
1916static struct fcoe_interface *
1917fcoe_hostlist_lookup_realdev_port(struct net_device *netdev)
1918{
1919 struct fcoe_interface *fcoe;
1920 struct net_device *real_dev;
1921
1922 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1923 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
1924 real_dev = vlan_dev_real_dev(fcoe->netdev);
1925 else
1926 real_dev = fcoe->netdev;
1927
1928 if (netdev == real_dev)
1929 return fcoe;
1930 }
1931 return NULL;
1932}
1933
1934static int fcoe_dcb_app_notification(struct notifier_block *notifier,
1935 ulong event, void *ptr)
1936{
1937 struct dcb_app_type *entry = ptr;
1938 struct fcoe_ctlr *ctlr;
1939 struct fcoe_interface *fcoe;
1940 struct net_device *netdev;
1941 int prio;
1942
1943 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE)
1944 return NOTIFY_OK;
1945
1946 netdev = dev_get_by_index(&init_net, entry->ifindex);
1947 if (!netdev)
1948 return NOTIFY_OK;
1949
1950 fcoe = fcoe_hostlist_lookup_realdev_port(netdev);
1951 dev_put(netdev);
1952 if (!fcoe)
1953 return NOTIFY_OK;
1954
1955 ctlr = fcoe_to_ctlr(fcoe);
1956
1957 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE)
1958 prio = ffs(entry->app.priority) - 1;
1959 else
1960 prio = entry->app.priority;
1961
1962 if (prio < 0)
1963 return NOTIFY_OK;
1964
1965 if (entry->app.protocol == ETH_P_FIP ||
1966 entry->app.protocol == ETH_P_FCOE)
1967 ctlr->priority = prio;
1968
1969 if (entry->app.protocol == ETH_P_FCOE)
1970 fcoe->priority = prio;
1971
1972 return NOTIFY_OK;
1973}
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985static int fcoe_device_notification(struct notifier_block *notifier,
1986 ulong event, void *ptr)
1987{
1988 struct fcoe_ctlr_device *cdev;
1989 struct fc_lport *lport = NULL;
1990 struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
1991 struct fcoe_ctlr *ctlr;
1992 struct fcoe_interface *fcoe;
1993 struct fcoe_port *port;
1994 struct fc_stats *stats;
1995 u32 link_possible = 1;
1996 u32 mfs;
1997 int rc = NOTIFY_OK;
1998
1999 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
2000 if (fcoe->netdev == netdev) {
2001 ctlr = fcoe_to_ctlr(fcoe);
2002 lport = ctlr->lp;
2003 break;
2004 }
2005 }
2006 if (!lport) {
2007 rc = NOTIFY_DONE;
2008 goto out;
2009 }
2010
2011 switch (event) {
2012 case NETDEV_DOWN:
2013 case NETDEV_GOING_DOWN:
2014 link_possible = 0;
2015 break;
2016 case NETDEV_UP:
2017 case NETDEV_CHANGE:
2018 break;
2019 case NETDEV_CHANGEMTU:
2020 if (netdev->features & NETIF_F_FCOE_MTU)
2021 break;
2022 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
2023 sizeof(struct fcoe_crc_eof));
2024 if (mfs >= FC_MIN_MAX_FRAME)
2025 fc_set_mfs(lport, mfs);
2026 break;
2027 case NETDEV_REGISTER:
2028 break;
2029 case NETDEV_UNREGISTER:
2030 list_del(&fcoe->list);
2031 port = lport_priv(ctlr->lp);
2032 queue_work(fcoe_wq, &port->destroy_work);
2033 goto out;
2034 break;
2035 case NETDEV_FEAT_CHANGE:
2036 fcoe_netdev_features_change(lport, netdev);
2037 break;
2038 default:
2039 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
2040 "from netdev netlink\n", event);
2041 }
2042
2043 fcoe_link_speed_update(lport);
2044
2045 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2046
2047 if (link_possible && !fcoe_link_ok(lport)) {
2048 switch (cdev->enabled) {
2049 case FCOE_CTLR_DISABLED:
2050 pr_info("Link up while interface is disabled.\n");
2051 break;
2052 case FCOE_CTLR_ENABLED:
2053 case FCOE_CTLR_UNUSED:
2054 fcoe_ctlr_link_up(ctlr);
2055 };
2056 } else if (fcoe_ctlr_link_down(ctlr)) {
2057 switch (cdev->enabled) {
2058 case FCOE_CTLR_DISABLED:
2059 pr_info("Link down while interface is disabled.\n");
2060 break;
2061 case FCOE_CTLR_ENABLED:
2062 case FCOE_CTLR_UNUSED:
2063 stats = per_cpu_ptr(lport->stats, get_cpu());
2064 stats->LinkFailureCount++;
2065 put_cpu();
2066 fcoe_clean_pending_queue(lport);
2067 };
2068 }
2069out:
2070 return rc;
2071}
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083static int fcoe_disable(struct net_device *netdev)
2084{
2085 struct fcoe_ctlr *ctlr;
2086 struct fcoe_interface *fcoe;
2087 int rc = 0;
2088
2089 mutex_lock(&fcoe_config_mutex);
2090
2091 rtnl_lock();
2092 fcoe = fcoe_hostlist_lookup_port(netdev);
2093 rtnl_unlock();
2094
2095 if (fcoe) {
2096 ctlr = fcoe_to_ctlr(fcoe);
2097 fcoe_ctlr_link_down(ctlr);
2098 fcoe_clean_pending_queue(ctlr->lp);
2099 } else
2100 rc = -ENODEV;
2101
2102 mutex_unlock(&fcoe_config_mutex);
2103 return rc;
2104}
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114static int fcoe_enable(struct net_device *netdev)
2115{
2116 struct fcoe_ctlr *ctlr;
2117 struct fcoe_interface *fcoe;
2118 int rc = 0;
2119
2120 mutex_lock(&fcoe_config_mutex);
2121 rtnl_lock();
2122 fcoe = fcoe_hostlist_lookup_port(netdev);
2123 rtnl_unlock();
2124
2125 if (!fcoe) {
2126 rc = -ENODEV;
2127 goto out;
2128 }
2129
2130 ctlr = fcoe_to_ctlr(fcoe);
2131
2132 if (!fcoe_link_ok(ctlr->lp))
2133 fcoe_ctlr_link_up(ctlr);
2134
2135out:
2136 mutex_unlock(&fcoe_config_mutex);
2137 return rc;
2138}
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev)
2151{
2152 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev);
2153 struct fc_lport *lport = ctlr->lp;
2154 struct net_device *netdev = fcoe_netdev(lport);
2155
2156 switch (cdev->enabled) {
2157 case FCOE_CTLR_ENABLED:
2158 return fcoe_enable(netdev);
2159 case FCOE_CTLR_DISABLED:
2160 return fcoe_disable(netdev);
2161 case FCOE_CTLR_UNUSED:
2162 default:
2163 return -ENOTSUPP;
2164 };
2165}
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175static int fcoe_destroy(struct net_device *netdev)
2176{
2177 struct fcoe_ctlr *ctlr;
2178 struct fcoe_interface *fcoe;
2179 struct fc_lport *lport;
2180 struct fcoe_port *port;
2181 int rc = 0;
2182
2183 mutex_lock(&fcoe_config_mutex);
2184 rtnl_lock();
2185 fcoe = fcoe_hostlist_lookup_port(netdev);
2186 if (!fcoe) {
2187 rc = -ENODEV;
2188 goto out_nodev;
2189 }
2190 ctlr = fcoe_to_ctlr(fcoe);
2191 lport = ctlr->lp;
2192 port = lport_priv(lport);
2193 list_del(&fcoe->list);
2194 queue_work(fcoe_wq, &port->destroy_work);
2195out_nodev:
2196 rtnl_unlock();
2197 mutex_unlock(&fcoe_config_mutex);
2198 return rc;
2199}
2200
2201
2202
2203
2204
2205static void fcoe_destroy_work(struct work_struct *work)
2206{
2207 struct fcoe_ctlr_device *cdev;
2208 struct fcoe_ctlr *ctlr;
2209 struct fcoe_port *port;
2210 struct fcoe_interface *fcoe;
2211 struct Scsi_Host *shost;
2212 struct fc_host_attrs *fc_host;
2213 unsigned long flags;
2214 struct fc_vport *vport;
2215 struct fc_vport *next_vport;
2216
2217 port = container_of(work, struct fcoe_port, destroy_work);
2218 shost = port->lport->host;
2219 fc_host = shost_to_fc_host(shost);
2220
2221
2222 spin_lock_irqsave(shost->host_lock, flags);
2223 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
2224 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
2225 continue;
2226 } else {
2227 vport->flags |= FC_VPORT_DELETING;
2228 queue_work(fc_host_work_q(shost),
2229 &vport->vport_delete_work);
2230 }
2231 }
2232 spin_unlock_irqrestore(shost->host_lock, flags);
2233
2234 flush_workqueue(fc_host_work_q(shost));
2235
2236 mutex_lock(&fcoe_config_mutex);
2237
2238 fcoe = port->priv;
2239 ctlr = fcoe_to_ctlr(fcoe);
2240 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2241
2242 fcoe_if_destroy(port->lport);
2243 fcoe_interface_cleanup(fcoe);
2244
2245 mutex_unlock(&fcoe_config_mutex);
2246
2247 fcoe_ctlr_device_delete(cdev);
2248}
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259static bool fcoe_match(struct net_device *netdev)
2260{
2261 return true;
2262}
2263
2264
2265
2266
2267
2268
2269
2270static void fcoe_dcb_create(struct fcoe_interface *fcoe)
2271{
2272#ifdef CONFIG_DCB
2273 int dcbx;
2274 u8 fup, up;
2275 struct net_device *netdev = fcoe->realdev;
2276 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2277 struct dcb_app app = {
2278 .priority = 0,
2279 .protocol = ETH_P_FCOE
2280 };
2281
2282
2283 if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) {
2284 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
2285
2286 if (dcbx & DCB_CAP_DCBX_VER_IEEE) {
2287 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
2288 up = dcb_ieee_getapp_mask(netdev, &app);
2289 app.protocol = ETH_P_FIP;
2290 fup = dcb_ieee_getapp_mask(netdev, &app);
2291 } else {
2292 app.selector = DCB_APP_IDTYPE_ETHTYPE;
2293 up = dcb_getapp(netdev, &app);
2294 app.protocol = ETH_P_FIP;
2295 fup = dcb_getapp(netdev, &app);
2296 }
2297
2298 fcoe->priority = ffs(up) ? ffs(up) - 1 : 0;
2299 ctlr->priority = ffs(fup) ? ffs(fup) - 1 : fcoe->priority;
2300 }
2301#endif
2302}
2303
2304enum fcoe_create_link_state {
2305 FCOE_CREATE_LINK_DOWN,
2306 FCOE_CREATE_LINK_UP,
2307};
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322static int _fcoe_create(struct net_device *netdev, enum fip_state fip_mode,
2323 enum fcoe_create_link_state link_state)
2324{
2325 int rc = 0;
2326 struct fcoe_ctlr_device *ctlr_dev;
2327 struct fcoe_ctlr *ctlr;
2328 struct fcoe_interface *fcoe;
2329 struct fc_lport *lport;
2330
2331 mutex_lock(&fcoe_config_mutex);
2332 rtnl_lock();
2333
2334
2335 if (fcoe_hostlist_lookup(netdev)) {
2336 rc = -EEXIST;
2337 goto out_nodev;
2338 }
2339
2340 fcoe = fcoe_interface_create(netdev, fip_mode);
2341 if (IS_ERR(fcoe)) {
2342 rc = PTR_ERR(fcoe);
2343 goto out_nodev;
2344 }
2345
2346 ctlr = fcoe_to_ctlr(fcoe);
2347 ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr);
2348 lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0);
2349 if (IS_ERR(lport)) {
2350 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
2351 netdev->name);
2352 rc = -EIO;
2353 rtnl_unlock();
2354 fcoe_interface_cleanup(fcoe);
2355 mutex_unlock(&fcoe_config_mutex);
2356 fcoe_ctlr_device_delete(ctlr_dev);
2357 goto out;
2358 }
2359
2360
2361 ctlr->lp = lport;
2362
2363
2364 fcoe_dcb_create(fcoe);
2365
2366
2367 lport->boot_time = jiffies;
2368 fc_fabric_login(lport);
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382 if (link_state == FCOE_CREATE_LINK_UP)
2383 ctlr_dev->enabled = FCOE_CTLR_ENABLED;
2384 else
2385 ctlr_dev->enabled = FCOE_CTLR_DISABLED;
2386
2387 if (link_state == FCOE_CREATE_LINK_UP &&
2388 !fcoe_link_ok(lport)) {
2389 rtnl_unlock();
2390 fcoe_ctlr_link_up(ctlr);
2391 mutex_unlock(&fcoe_config_mutex);
2392 return rc;
2393 }
2394
2395out_nodev:
2396 rtnl_unlock();
2397 mutex_unlock(&fcoe_config_mutex);
2398out:
2399 return rc;
2400}
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode)
2412{
2413 return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP);
2414}
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427static int fcoe_ctlr_alloc(struct net_device *netdev)
2428{
2429 return _fcoe_create(netdev, FIP_MODE_FABRIC,
2430 FCOE_CREATE_LINK_DOWN);
2431}
2432
2433
2434
2435
2436
2437
2438
2439
2440static int fcoe_link_ok(struct fc_lport *lport)
2441{
2442 struct net_device *netdev = fcoe_netdev(lport);
2443
2444 if (netif_oper_up(netdev))
2445 return 0;
2446 return -1;
2447}
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460static void fcoe_percpu_clean(struct fc_lport *lport)
2461{
2462 struct fcoe_percpu_s *pp;
2463 struct sk_buff *skb;
2464 unsigned int cpu;
2465
2466 for_each_possible_cpu(cpu) {
2467 pp = &per_cpu(fcoe_percpu, cpu);
2468
2469 if (!pp->thread || !cpu_online(cpu))
2470 continue;
2471
2472 skb = dev_alloc_skb(0);
2473 if (!skb)
2474 continue;
2475
2476 skb->destructor = fcoe_percpu_flush_done;
2477
2478 spin_lock_bh(&pp->fcoe_rx_list.lock);
2479 __skb_queue_tail(&pp->fcoe_rx_list, skb);
2480 if (pp->fcoe_rx_list.qlen == 1)
2481 wake_up_process(pp->thread);
2482 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2483
2484 wait_for_completion(&fcoe_flush_completion);
2485 }
2486}
2487
2488
2489
2490
2491
2492
2493
2494static int fcoe_reset(struct Scsi_Host *shost)
2495{
2496 struct fc_lport *lport = shost_priv(shost);
2497 struct fcoe_port *port = lport_priv(lport);
2498 struct fcoe_interface *fcoe = port->priv;
2499 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2500 struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2501
2502 fcoe_ctlr_link_down(ctlr);
2503 fcoe_clean_pending_queue(ctlr->lp);
2504
2505 if (cdev->enabled != FCOE_CTLR_DISABLED &&
2506 !fcoe_link_ok(ctlr->lp))
2507 fcoe_ctlr_link_up(ctlr);
2508 return 0;
2509}
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519static struct fcoe_interface *
2520fcoe_hostlist_lookup_port(const struct net_device *netdev)
2521{
2522 struct fcoe_interface *fcoe;
2523
2524 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
2525 if (fcoe->netdev == netdev)
2526 return fcoe;
2527 }
2528 return NULL;
2529}
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
2541{
2542 struct fcoe_ctlr *ctlr;
2543 struct fcoe_interface *fcoe;
2544
2545 fcoe = fcoe_hostlist_lookup_port(netdev);
2546 ctlr = fcoe_to_ctlr(fcoe);
2547 return (fcoe) ? ctlr->lp : NULL;
2548}
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559static int fcoe_hostlist_add(const struct fc_lport *lport)
2560{
2561 struct fcoe_interface *fcoe;
2562 struct fcoe_port *port;
2563
2564 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2565 if (!fcoe) {
2566 port = lport_priv(lport);
2567 fcoe = port->priv;
2568 list_add_tail(&fcoe->list, &fcoe_hostlist);
2569 }
2570 return 0;
2571}
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581static void fcoe_hostlist_del(const struct fc_lport *lport)
2582{
2583 struct fcoe_interface *fcoe;
2584 struct fcoe_port *port;
2585
2586 port = lport_priv(lport);
2587 fcoe = port->priv;
2588 list_del(&fcoe->list);
2589 return;
2590}
2591
2592static struct fcoe_transport fcoe_sw_transport = {
2593 .name = {FCOE_TRANSPORT_DEFAULT},
2594 .attached = false,
2595 .list = LIST_HEAD_INIT(fcoe_sw_transport.list),
2596 .match = fcoe_match,
2597 .alloc = fcoe_ctlr_alloc,
2598 .create = fcoe_create,
2599 .destroy = fcoe_destroy,
2600 .enable = fcoe_enable,
2601 .disable = fcoe_disable,
2602};
2603
2604
2605
2606
2607
2608
2609static int __init fcoe_init(void)
2610{
2611 struct fcoe_percpu_s *p;
2612 unsigned int cpu;
2613 int rc = 0;
2614
2615 fcoe_wq = alloc_workqueue("fcoe", 0, 0);
2616 if (!fcoe_wq)
2617 return -ENOMEM;
2618
2619
2620 rc = fcoe_transport_attach(&fcoe_sw_transport);
2621 if (rc) {
2622 printk(KERN_ERR "failed to register an fcoe transport, check "
2623 "if libfcoe is loaded\n");
2624 return rc;
2625 }
2626
2627 mutex_lock(&fcoe_config_mutex);
2628
2629 for_each_possible_cpu(cpu) {
2630 p = &per_cpu(fcoe_percpu, cpu);
2631 skb_queue_head_init(&p->fcoe_rx_list);
2632 }
2633
2634 cpu_notifier_register_begin();
2635
2636 for_each_online_cpu(cpu)
2637 fcoe_percpu_thread_create(cpu);
2638
2639
2640 rc = __register_hotcpu_notifier(&fcoe_cpu_notifier);
2641 if (rc)
2642 goto out_free;
2643
2644 cpu_notifier_register_done();
2645
2646
2647 fcoe_dev_setup();
2648
2649 rc = fcoe_if_init();
2650 if (rc)
2651 goto out_free;
2652
2653 mutex_unlock(&fcoe_config_mutex);
2654 return 0;
2655
2656out_free:
2657 for_each_online_cpu(cpu) {
2658 fcoe_percpu_thread_destroy(cpu);
2659 }
2660
2661 cpu_notifier_register_done();
2662
2663 mutex_unlock(&fcoe_config_mutex);
2664 destroy_workqueue(fcoe_wq);
2665 return rc;
2666}
2667module_init(fcoe_init);
2668
2669
2670
2671
2672
2673
2674static void __exit fcoe_exit(void)
2675{
2676 struct fcoe_interface *fcoe, *tmp;
2677 struct fcoe_ctlr *ctlr;
2678 struct fcoe_port *port;
2679 unsigned int cpu;
2680
2681 mutex_lock(&fcoe_config_mutex);
2682
2683 fcoe_dev_cleanup();
2684
2685
2686 rtnl_lock();
2687 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
2688 ctlr = fcoe_to_ctlr(fcoe);
2689 port = lport_priv(ctlr->lp);
2690 fcoe_hostlist_del(port->lport);
2691 queue_work(fcoe_wq, &port->destroy_work);
2692 }
2693 rtnl_unlock();
2694
2695 cpu_notifier_register_begin();
2696
2697 for_each_online_cpu(cpu)
2698 fcoe_percpu_thread_destroy(cpu);
2699
2700 __unregister_hotcpu_notifier(&fcoe_cpu_notifier);
2701
2702 cpu_notifier_register_done();
2703
2704 mutex_unlock(&fcoe_config_mutex);
2705
2706
2707
2708
2709
2710 destroy_workqueue(fcoe_wq);
2711
2712
2713
2714
2715
2716
2717 fcoe_if_exit();
2718
2719
2720 fcoe_transport_detach(&fcoe_sw_transport);
2721}
2722module_exit(fcoe_exit);
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2734{
2735 struct fcoe_ctlr *fip = arg;
2736 struct fc_exch *exch = fc_seq_exch(seq);
2737 struct fc_lport *lport = exch->lp;
2738 u8 *mac;
2739
2740 if (IS_ERR(fp))
2741 goto done;
2742
2743 mac = fr_cb(fp)->granted_mac;
2744
2745 if (is_zero_ether_addr(mac))
2746 fcoe_ctlr_recv_flogi(fip, lport, fp);
2747 if (!is_zero_ether_addr(mac))
2748 fcoe_update_src_mac(lport, mac);
2749done:
2750 fc_lport_flogi_resp(seq, fp, lport);
2751}
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2763{
2764 struct fc_lport *lport = arg;
2765 static u8 zero_mac[ETH_ALEN] = { 0 };
2766
2767 if (!IS_ERR(fp))
2768 fcoe_update_src_mac(lport, zero_mac);
2769 fc_lport_logo_resp(seq, fp, lport);
2770}
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2782 struct fc_frame *fp, unsigned int op,
2783 void (*resp)(struct fc_seq *,
2784 struct fc_frame *,
2785 void *),
2786 void *arg, u32 timeout)
2787{
2788 struct fcoe_port *port = lport_priv(lport);
2789 struct fcoe_interface *fcoe = port->priv;
2790 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
2791 struct fc_frame_header *fh = fc_frame_header_get(fp);
2792
2793 switch (op) {
2794 case ELS_FLOGI:
2795 case ELS_FDISC:
2796 if (lport->point_to_multipoint)
2797 break;
2798 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2799 fip, timeout);
2800 case ELS_LOGO:
2801
2802 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2803 break;
2804 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
2805 lport, timeout);
2806 }
2807 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2808}
2809
2810
2811
2812
2813
2814
2815
2816
2817static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2818{
2819 struct Scsi_Host *shost = vport_to_shost(vport);
2820 struct fc_lport *n_port = shost_priv(shost);
2821 struct fcoe_port *port = lport_priv(n_port);
2822 struct fcoe_interface *fcoe = port->priv;
2823 struct net_device *netdev = fcoe->netdev;
2824 struct fc_lport *vn_port;
2825 int rc;
2826 char buf[32];
2827
2828 rc = fcoe_validate_vport_create(vport);
2829 if (rc) {
2830 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
2831 printk(KERN_ERR "fcoe: Failed to create vport, "
2832 "WWPN (0x%s) already exists\n",
2833 buf);
2834 return rc;
2835 }
2836
2837 mutex_lock(&fcoe_config_mutex);
2838 rtnl_lock();
2839 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
2840 rtnl_unlock();
2841 mutex_unlock(&fcoe_config_mutex);
2842
2843 if (IS_ERR(vn_port)) {
2844 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2845 netdev->name);
2846 return -EIO;
2847 }
2848
2849 if (disabled) {
2850 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2851 } else {
2852 vn_port->boot_time = jiffies;
2853 fc_fabric_login(vn_port);
2854 fc_vport_setlink(vn_port);
2855 }
2856 return 0;
2857}
2858
2859
2860
2861
2862
2863
2864
2865static int fcoe_vport_destroy(struct fc_vport *vport)
2866{
2867 struct Scsi_Host *shost = vport_to_shost(vport);
2868 struct fc_lport *n_port = shost_priv(shost);
2869 struct fc_lport *vn_port = vport->dd_data;
2870
2871 mutex_lock(&n_port->lp_mutex);
2872 list_del(&vn_port->list);
2873 mutex_unlock(&n_port->lp_mutex);
2874
2875 mutex_lock(&fcoe_config_mutex);
2876 fcoe_if_destroy(vn_port);
2877 mutex_unlock(&fcoe_config_mutex);
2878
2879 return 0;
2880}
2881
2882
2883
2884
2885
2886
2887static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2888{
2889 struct fc_lport *lport = vport->dd_data;
2890
2891 if (disable) {
2892 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2893 fc_fabric_logoff(lport);
2894 } else {
2895 lport->boot_time = jiffies;
2896 fc_fabric_login(lport);
2897 fc_vport_setlink(lport);
2898 }
2899
2900 return 0;
2901}
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2912{
2913 struct fc_lport *lport = vport->dd_data;
2914 struct fc_frame *fp;
2915 size_t len;
2916
2917 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2918 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2919 fcoe_netdev(lport)->name, vport->symbolic_name);
2920
2921 if (lport->state != LPORT_ST_READY)
2922 return;
2923
2924 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2925 fp = fc_frame_alloc(lport,
2926 sizeof(struct fc_ct_hdr) +
2927 sizeof(struct fc_ns_rspn) + len);
2928 if (!fp)
2929 return;
2930 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
2931 NULL, NULL, 3 * lport->r_a_tov);
2932}
2933
2934static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev)
2935{
2936 struct fcoe_ctlr_device *ctlr_dev =
2937 fcoe_fcf_dev_to_ctlr_dev(fcf_dev);
2938 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
2939 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);
2940
2941 fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev);
2942}
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956static void fcoe_set_port_id(struct fc_lport *lport,
2957 u32 port_id, struct fc_frame *fp)
2958{
2959 struct fcoe_port *port = lport_priv(lport);
2960 struct fcoe_interface *fcoe = port->priv;
2961 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2962
2963 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
2964 fcoe_ctlr_recv_flogi(ctlr, lport, fp);
2965}
2966