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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 = fc_change_queue_depth,
284 .change_queue_type = fc_change_queue_type,
285 .this_id = -1,
286 .cmd_per_lun = 3,
287 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
288 .use_clustering = ENABLE_CLUSTERING,
289 .sg_tablesize = SG_ALL,
290 .max_sectors = 0xffff,
291};
292
293
294
295
296
297
298
299
300
301static int fcoe_interface_setup(struct fcoe_interface *fcoe,
302 struct net_device *netdev)
303{
304 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
305 struct netdev_hw_addr *ha;
306 struct net_device *real_dev;
307 u8 flogi_maddr[ETH_ALEN];
308 const struct net_device_ops *ops;
309
310 fcoe->netdev = netdev;
311
312
313 ops = netdev->netdev_ops;
314 if (ops->ndo_fcoe_enable) {
315 if (ops->ndo_fcoe_enable(netdev))
316 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
317 " specific feature for LLD.\n");
318 }
319
320
321 if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) {
322 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
323 return -EOPNOTSUPP;
324 }
325
326
327
328 real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ?
329 vlan_dev_real_dev(netdev) : netdev;
330 fcoe->realdev = real_dev;
331 rcu_read_lock();
332 for_each_dev_addr(real_dev, ha) {
333 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
334 (is_valid_ether_addr(ha->addr))) {
335 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
336 fip->spma = 1;
337 break;
338 }
339 }
340 rcu_read_unlock();
341
342
343 if (!fip->spma)
344 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
345
346
347
348
349
350
351 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
352 dev_uc_add(netdev, flogi_maddr);
353 if (fip->spma)
354 dev_uc_add(netdev, fip->ctl_src_addr);
355 if (fip->mode == FIP_MODE_VN2VN) {
356 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS);
357 dev_mc_add(netdev, FIP_ALL_P2P_MACS);
358 } else
359 dev_mc_add(netdev, FIP_ALL_ENODE_MACS);
360
361
362
363
364
365 fcoe->fcoe_packet_type.func = fcoe_rcv;
366 fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
367 fcoe->fcoe_packet_type.dev = netdev;
368 dev_add_pack(&fcoe->fcoe_packet_type);
369
370 fcoe->fip_packet_type.func = fcoe_fip_recv;
371 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
372 fcoe->fip_packet_type.dev = netdev;
373 dev_add_pack(&fcoe->fip_packet_type);
374
375 return 0;
376}
377
378
379
380
381
382
383
384
385static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
386 enum fip_state fip_mode)
387{
388 struct fcoe_ctlr_device *ctlr_dev;
389 struct fcoe_ctlr *ctlr;
390 struct fcoe_interface *fcoe;
391 int size;
392 int err;
393
394 if (!try_module_get(THIS_MODULE)) {
395 FCOE_NETDEV_DBG(netdev,
396 "Could not get a reference to the module\n");
397 fcoe = ERR_PTR(-EBUSY);
398 goto out;
399 }
400
401 size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface);
402 ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ,
403 size);
404 if (!ctlr_dev) {
405 FCOE_DBG("Failed to add fcoe_ctlr_device\n");
406 fcoe = ERR_PTR(-ENOMEM);
407 goto out_putmod;
408 }
409
410 ctlr = fcoe_ctlr_device_priv(ctlr_dev);
411 fcoe = fcoe_ctlr_priv(ctlr);
412
413 dev_hold(netdev);
414
415
416
417
418 fcoe_ctlr_init(ctlr, fip_mode);
419 ctlr->send = fcoe_fip_send;
420 ctlr->update_mac = fcoe_update_src_mac;
421 ctlr->get_src_addr = fcoe_get_src_mac;
422
423 err = fcoe_interface_setup(fcoe, netdev);
424 if (err) {
425 fcoe_ctlr_destroy(ctlr);
426 fcoe_ctlr_device_delete(ctlr_dev);
427 dev_put(netdev);
428 fcoe = ERR_PTR(err);
429 goto out_putmod;
430 }
431
432 goto out;
433
434out_putmod:
435 module_put(THIS_MODULE);
436out:
437 return fcoe;
438}
439
440
441
442
443
444
445
446static void fcoe_interface_remove(struct fcoe_interface *fcoe)
447{
448 struct net_device *netdev = fcoe->netdev;
449 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
450 u8 flogi_maddr[ETH_ALEN];
451 const struct net_device_ops *ops;
452
453
454
455
456
457
458
459 __dev_remove_pack(&fcoe->fcoe_packet_type);
460 __dev_remove_pack(&fcoe->fip_packet_type);
461 synchronize_net();
462
463
464 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
465 dev_uc_del(netdev, flogi_maddr);
466 if (fip->spma)
467 dev_uc_del(netdev, fip->ctl_src_addr);
468 if (fip->mode == FIP_MODE_VN2VN) {
469 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);
470 dev_mc_del(netdev, FIP_ALL_P2P_MACS);
471 } else
472 dev_mc_del(netdev, FIP_ALL_ENODE_MACS);
473
474
475 ops = netdev->netdev_ops;
476 if (ops->ndo_fcoe_disable) {
477 if (ops->ndo_fcoe_disable(netdev))
478 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
479 " specific feature for LLD.\n");
480 }
481 fcoe->removed = 1;
482}
483
484
485
486
487
488
489static void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
490{
491 struct net_device *netdev = fcoe->netdev;
492 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
493
494 rtnl_lock();
495 if (!fcoe->removed)
496 fcoe_interface_remove(fcoe);
497 rtnl_unlock();
498
499
500
501 fcoe_ctlr_destroy(fip);
502 scsi_host_put(fip->lp->host);
503 dev_put(netdev);
504 module_put(THIS_MODULE);
505}
506
507
508
509
510
511
512
513
514
515
516
517static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
518 struct packet_type *ptype,
519 struct net_device *orig_dev)
520{
521 struct fcoe_interface *fcoe;
522 struct fcoe_ctlr *ctlr;
523
524 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
525 ctlr = fcoe_to_ctlr(fcoe);
526 fcoe_ctlr_recv(ctlr, skb);
527 return 0;
528}
529
530
531
532
533
534
535static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb)
536{
537 if (port->fcoe_pending_queue.qlen)
538 fcoe_check_wait_queue(port->lport, skb);
539 else if (fcoe_start_io(skb))
540 fcoe_check_wait_queue(port->lport, skb);
541}
542
543
544
545
546
547
548static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
549{
550 skb->dev = fcoe_from_ctlr(fip)->netdev;
551 fcoe_port_send(lport_priv(fip->lp), skb);
552}
553
554
555
556
557
558
559
560
561
562static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
563{
564 struct fcoe_port *port = lport_priv(lport);
565 struct fcoe_interface *fcoe = port->priv;
566
567 if (!is_zero_ether_addr(port->data_src_addr))
568 dev_uc_del(fcoe->netdev, port->data_src_addr);
569 if (!is_zero_ether_addr(addr))
570 dev_uc_add(fcoe->netdev, addr);
571 memcpy(port->data_src_addr, addr, ETH_ALEN);
572}
573
574
575
576
577
578static u8 *fcoe_get_src_mac(struct fc_lport *lport)
579{
580 struct fcoe_port *port = lport_priv(lport);
581
582 return port->data_src_addr;
583}
584
585
586
587
588
589
590
591static int fcoe_lport_config(struct fc_lport *lport)
592{
593 lport->link_up = 0;
594 lport->qfull = 0;
595 lport->max_retry_count = 3;
596 lport->max_rport_retry_count = 3;
597 lport->e_d_tov = 2 * 1000;
598 lport->r_a_tov = 2 * 2 * 1000;
599 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
600 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
601 lport->does_npiv = 1;
602
603 fc_lport_init_stats(lport);
604
605
606 fc_lport_config(lport);
607
608
609 lport->crc_offload = 0;
610 lport->seq_offload = 0;
611 lport->lro_enabled = 0;
612 lport->lro_xid = 0;
613 lport->lso_max = 0;
614
615 return 0;
616}
617
618
619
620
621
622static void fcoe_netdev_features_change(struct fc_lport *lport,
623 struct net_device *netdev)
624{
625 mutex_lock(&lport->lp_mutex);
626
627 if (netdev->features & NETIF_F_SG)
628 lport->sg_supp = 1;
629 else
630 lport->sg_supp = 0;
631
632 if (netdev->features & NETIF_F_FCOE_CRC) {
633 lport->crc_offload = 1;
634 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
635 } else {
636 lport->crc_offload = 0;
637 }
638
639 if (netdev->features & NETIF_F_FSO) {
640 lport->seq_offload = 1;
641 lport->lso_max = netdev->gso_max_size;
642 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
643 lport->lso_max);
644 } else {
645 lport->seq_offload = 0;
646 lport->lso_max = 0;
647 }
648
649 if (netdev->fcoe_ddp_xid) {
650 lport->lro_enabled = 1;
651 lport->lro_xid = netdev->fcoe_ddp_xid;
652 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
653 lport->lro_xid);
654 } else {
655 lport->lro_enabled = 0;
656 lport->lro_xid = 0;
657 }
658
659 mutex_unlock(&lport->lp_mutex);
660}
661
662
663
664
665
666
667
668
669
670
671static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
672{
673 u32 mfs;
674 u64 wwnn, wwpn;
675 struct fcoe_interface *fcoe;
676 struct fcoe_ctlr *ctlr;
677 struct fcoe_port *port;
678
679
680 port = lport_priv(lport);
681 fcoe = port->priv;
682 ctlr = fcoe_to_ctlr(fcoe);
683
684
685
686
687
688
689 mfs = netdev->mtu;
690 if (netdev->features & NETIF_F_FCOE_MTU) {
691 mfs = FCOE_MTU;
692 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
693 }
694 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
695 if (fc_set_mfs(lport, mfs))
696 return -EINVAL;
697
698
699 fcoe_netdev_features_change(lport, netdev);
700
701 skb_queue_head_init(&port->fcoe_pending_queue);
702 port->fcoe_pending_queue_active = 0;
703 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
704
705 fcoe_link_speed_update(lport);
706
707 if (!lport->vport) {
708 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
709 wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0);
710 fc_set_wwnn(lport, wwnn);
711 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
712 wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr,
713 2, 0);
714 fc_set_wwpn(lport, wwpn);
715 }
716
717 return 0;
718}
719
720
721
722
723
724
725
726
727
728
729static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)
730{
731 int rc = 0;
732
733
734 lport->host->max_lun = FCOE_MAX_LUN;
735 lport->host->max_id = FCOE_MAX_FCP_TARGET;
736 lport->host->max_channel = 0;
737 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;
738
739 if (lport->vport)
740 lport->host->transportt = fcoe_vport_scsi_transport;
741 else
742 lport->host->transportt = fcoe_nport_scsi_transport;
743
744
745 rc = scsi_add_host(lport->host, dev);
746 if (rc) {
747 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
748 "error on scsi_add_host\n");
749 return rc;
750 }
751
752 if (!lport->vport)
753 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
754
755 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
756 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
757 fcoe_netdev(lport)->name);
758
759 return 0;
760}
761
762
763
764
765
766
767
768
769
770
771static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev)
772{
773 struct fcoe_interface *fcoe;
774 struct fcoe_port *port;
775 struct net_device *realdev;
776 int rc;
777
778 port = lport_priv(lport);
779 fcoe = port->priv;
780 realdev = fcoe->realdev;
781
782 if (!realdev)
783 return;
784
785
786 if (lport->vport)
787 return;
788
789 if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) {
790 struct netdev_fcoe_hbainfo *fdmi;
791 fdmi = kzalloc(sizeof(*fdmi), GFP_KERNEL);
792 if (!fdmi)
793 return;
794
795 rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev,
796 fdmi);
797 if (rc) {
798 printk(KERN_INFO "fcoe: Failed to retrieve FDMI "
799 "information from netdev.\n");
800 return;
801 }
802
803 snprintf(fc_host_serial_number(lport->host),
804 FC_SERIAL_NUMBER_SIZE,
805 "%s",
806 fdmi->serial_number);
807 snprintf(fc_host_manufacturer(lport->host),
808 FC_SERIAL_NUMBER_SIZE,
809 "%s",
810 fdmi->manufacturer);
811 snprintf(fc_host_model(lport->host),
812 FC_SYMBOLIC_NAME_SIZE,
813 "%s",
814 fdmi->model);
815 snprintf(fc_host_model_description(lport->host),
816 FC_SYMBOLIC_NAME_SIZE,
817 "%s",
818 fdmi->model_description);
819 snprintf(fc_host_hardware_version(lport->host),
820 FC_VERSION_STRING_SIZE,
821 "%s",
822 fdmi->hardware_version);
823 snprintf(fc_host_driver_version(lport->host),
824 FC_VERSION_STRING_SIZE,
825 "%s",
826 fdmi->driver_version);
827 snprintf(fc_host_optionrom_version(lport->host),
828 FC_VERSION_STRING_SIZE,
829 "%s",
830 fdmi->optionrom_version);
831 snprintf(fc_host_firmware_version(lport->host),
832 FC_VERSION_STRING_SIZE,
833 "%s",
834 fdmi->firmware_version);
835
836
837 lport->fdmi_enabled = 1;
838 kfree(fdmi);
839 } else {
840 lport->fdmi_enabled = 0;
841 printk(KERN_INFO "fcoe: No FDMI support.\n");
842 }
843}
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863static bool fcoe_oem_match(struct fc_frame *fp)
864{
865 struct fc_frame_header *fh = fc_frame_header_get(fp);
866 struct fcp_cmnd *fcp;
867
868 if (fc_fcp_is_read(fr_fsp(fp)) &&
869 (fr_fsp(fp)->data_len > fcoe_ddp_min))
870 return true;
871 else if ((fr_fsp(fp) == NULL) &&
872 (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) &&
873 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) {
874 fcp = fc_frame_payload_get(fp, sizeof(*fcp));
875 if ((fcp->fc_flags & FCP_CFL_WRDATA) &&
876 (ntohl(fcp->fc_dl) > fcoe_ddp_min))
877 return true;
878 }
879 return false;
880}
881
882
883
884
885
886
887
888static inline int fcoe_em_config(struct fc_lport *lport)
889{
890 struct fcoe_port *port = lport_priv(lport);
891 struct fcoe_interface *fcoe = port->priv;
892 struct fcoe_interface *oldfcoe = NULL;
893 struct net_device *old_real_dev, *cur_real_dev;
894 u16 min_xid = FCOE_MIN_XID;
895 u16 max_xid = FCOE_MAX_XID;
896
897
898
899
900
901 if (!lport->lro_enabled || !lport->lro_xid ||
902 (lport->lro_xid >= max_xid)) {
903 lport->lro_xid = 0;
904 goto skip_oem;
905 }
906
907
908
909
910
911 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
912 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
913 else
914 cur_real_dev = fcoe->netdev;
915
916 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
917 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
918 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
919 else
920 old_real_dev = oldfcoe->netdev;
921
922 if (cur_real_dev == old_real_dev) {
923 fcoe->oem = oldfcoe->oem;
924 break;
925 }
926 }
927
928 if (fcoe->oem) {
929 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
930 printk(KERN_ERR "fcoe_em_config: failed to add "
931 "offload em:%p on interface:%s\n",
932 fcoe->oem, fcoe->netdev->name);
933 return -ENOMEM;
934 }
935 } else {
936 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
937 FCOE_MIN_XID, lport->lro_xid,
938 fcoe_oem_match);
939 if (!fcoe->oem) {
940 printk(KERN_ERR "fcoe_em_config: failed to allocate "
941 "em for offload exches on interface:%s\n",
942 fcoe->netdev->name);
943 return -ENOMEM;
944 }
945 }
946
947
948
949
950 min_xid += lport->lro_xid + 1;
951
952skip_oem:
953 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
954 printk(KERN_ERR "fcoe_em_config: failed to "
955 "allocate em on interface %s\n", fcoe->netdev->name);
956 return -ENOMEM;
957 }
958
959 return 0;
960}
961
962
963
964
965
966
967static void fcoe_if_destroy(struct fc_lport *lport)
968{
969 struct fcoe_port *port = lport_priv(lport);
970 struct fcoe_interface *fcoe = port->priv;
971 struct net_device *netdev = fcoe->netdev;
972
973 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
974
975
976 fc_fabric_logoff(lport);
977
978
979 fc_lport_destroy(lport);
980
981
982 del_timer_sync(&port->timer);
983
984
985 fcoe_clean_pending_queue(lport);
986
987 rtnl_lock();
988 if (!is_zero_ether_addr(port->data_src_addr))
989 dev_uc_del(netdev, port->data_src_addr);
990 if (lport->vport)
991 synchronize_net();
992 else
993 fcoe_interface_remove(fcoe);
994 rtnl_unlock();
995
996
997 fcoe_percpu_clean(lport);
998
999
1000 fc_remove_host(lport->host);
1001 scsi_remove_host(lport->host);
1002
1003
1004 fc_fcp_destroy(lport);
1005
1006
1007 fc_exch_mgr_free(lport);
1008
1009
1010 fc_lport_free_stats(lport);
1011
1012
1013
1014
1015
1016 if (lport->vport)
1017 scsi_host_put(lport->host);
1018}
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
1030 struct scatterlist *sgl, unsigned int sgc)
1031{
1032 struct net_device *netdev = fcoe_netdev(lport);
1033
1034 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
1035 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
1036 xid, sgl,
1037 sgc);
1038
1039 return 0;
1040}
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051static int fcoe_ddp_target(struct fc_lport *lport, u16 xid,
1052 struct scatterlist *sgl, unsigned int sgc)
1053{
1054 struct net_device *netdev = fcoe_netdev(lport);
1055
1056 if (netdev->netdev_ops->ndo_fcoe_ddp_target)
1057 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid,
1058 sgl, sgc);
1059
1060 return 0;
1061}
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
1072{
1073 struct net_device *netdev = fcoe_netdev(lport);
1074
1075 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
1076 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
1077 return 0;
1078}
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
1091 struct device *parent, int npiv)
1092{
1093 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
1094 struct net_device *netdev = fcoe->netdev;
1095 struct fc_lport *lport, *n_port;
1096 struct fcoe_port *port;
1097 struct Scsi_Host *shost;
1098 int rc;
1099
1100
1101
1102
1103 struct fc_vport *vport = dev_to_vport(parent);
1104
1105 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
1106
1107 if (!npiv)
1108 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port));
1109 else
1110 lport = libfc_vport_create(vport, sizeof(*port));
1111
1112 if (!lport) {
1113 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
1114 rc = -ENOMEM;
1115 goto out;
1116 }
1117 port = lport_priv(lport);
1118 port->lport = lport;
1119 port->priv = fcoe;
1120 port->get_netdev = fcoe_netdev;
1121 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH;
1122 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH;
1123 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
1124
1125
1126
1127
1128
1129 fcoe_hostlist_add(lport);
1130
1131
1132 rc = fcoe_lport_config(lport);
1133 if (rc) {
1134 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
1135 "interface\n");
1136 goto out_host_put;
1137 }
1138
1139 if (npiv) {
1140 FCOE_NETDEV_DBG(netdev, "Setting vport names, "
1141 "%16.16llx %16.16llx\n",
1142 vport->node_name, vport->port_name);
1143 fc_set_wwnn(lport, vport->node_name);
1144 fc_set_wwpn(lport, vport->port_name);
1145 }
1146
1147
1148 rc = fcoe_netdev_config(lport, netdev);
1149 if (rc) {
1150 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
1151 "interface\n");
1152 goto out_lp_destroy;
1153 }
1154
1155
1156 rc = fcoe_shost_config(lport, parent);
1157 if (rc) {
1158 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
1159 "interface\n");
1160 goto out_lp_destroy;
1161 }
1162
1163
1164 rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1);
1165 if (rc) {
1166 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
1167 "interface\n");
1168 goto out_lp_destroy;
1169 }
1170
1171
1172 fcoe_fdmi_info(lport, netdev);
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183 if (!npiv)
1184
1185 rc = fcoe_em_config(lport);
1186 else {
1187 shost = vport_to_shost(vport);
1188 n_port = shost_priv(shost);
1189 rc = fc_exch_mgr_list_clone(n_port, lport);
1190 }
1191
1192 if (rc) {
1193 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n");
1194 goto out_lp_destroy;
1195 }
1196
1197 return lport;
1198
1199out_lp_destroy:
1200 fc_exch_mgr_free(lport);
1201out_host_put:
1202 fcoe_hostlist_del(lport);
1203 scsi_host_put(lport->host);
1204out:
1205 return ERR_PTR(rc);
1206}
1207
1208
1209
1210
1211
1212
1213
1214
1215static int __init fcoe_if_init(void)
1216{
1217
1218 fcoe_nport_scsi_transport =
1219 fc_attach_transport(&fcoe_nport_fc_functions);
1220 fcoe_vport_scsi_transport =
1221 fc_attach_transport(&fcoe_vport_fc_functions);
1222
1223 if (!fcoe_nport_scsi_transport) {
1224 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
1225 return -ENODEV;
1226 }
1227
1228 return 0;
1229}
1230
1231
1232
1233
1234
1235
1236
1237
1238static int __exit fcoe_if_exit(void)
1239{
1240 fc_release_transport(fcoe_nport_scsi_transport);
1241 fc_release_transport(fcoe_vport_scsi_transport);
1242 fcoe_nport_scsi_transport = NULL;
1243 fcoe_vport_scsi_transport = NULL;
1244 return 0;
1245}
1246
1247
1248
1249
1250
1251static void fcoe_percpu_thread_create(unsigned int cpu)
1252{
1253 struct fcoe_percpu_s *p;
1254 struct task_struct *thread;
1255
1256 p = &per_cpu(fcoe_percpu, cpu);
1257
1258 thread = kthread_create_on_node(fcoe_percpu_receive_thread,
1259 (void *)p, cpu_to_node(cpu),
1260 "fcoethread/%d", cpu);
1261
1262 if (likely(!IS_ERR(thread))) {
1263 kthread_bind(thread, cpu);
1264 wake_up_process(thread);
1265
1266 spin_lock_bh(&p->fcoe_rx_list.lock);
1267 p->thread = thread;
1268 spin_unlock_bh(&p->fcoe_rx_list.lock);
1269 }
1270}
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280static void fcoe_percpu_thread_destroy(unsigned int cpu)
1281{
1282 struct fcoe_percpu_s *p;
1283 struct task_struct *thread;
1284 struct page *crc_eof;
1285 struct sk_buff *skb;
1286#ifdef CONFIG_SMP
1287 struct fcoe_percpu_s *p0;
1288 unsigned targ_cpu = get_cpu();
1289#endif
1290
1291 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu);
1292
1293
1294 p = &per_cpu(fcoe_percpu, cpu);
1295 spin_lock_bh(&p->fcoe_rx_list.lock);
1296 thread = p->thread;
1297 p->thread = NULL;
1298 crc_eof = p->crc_eof_page;
1299 p->crc_eof_page = NULL;
1300 p->crc_eof_offset = 0;
1301 spin_unlock_bh(&p->fcoe_rx_list.lock);
1302
1303#ifdef CONFIG_SMP
1304
1305
1306
1307
1308
1309 if (cpu != targ_cpu) {
1310 p0 = &per_cpu(fcoe_percpu, targ_cpu);
1311 spin_lock_bh(&p0->fcoe_rx_list.lock);
1312 if (p0->thread) {
1313 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1314 cpu, targ_cpu);
1315
1316 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1317 __skb_queue_tail(&p0->fcoe_rx_list, skb);
1318 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1319 } else {
1320
1321
1322
1323
1324
1325 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1326 kfree_skb(skb);
1327 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1328 }
1329 } else {
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339 spin_lock_bh(&p->fcoe_rx_list.lock);
1340 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1341 kfree_skb(skb);
1342 spin_unlock_bh(&p->fcoe_rx_list.lock);
1343 }
1344 put_cpu();
1345#else
1346
1347
1348
1349
1350 spin_lock_bh(&p->fcoe_rx_list.lock);
1351 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1352 kfree_skb(skb);
1353 spin_unlock_bh(&p->fcoe_rx_list.lock);
1354#endif
1355
1356 if (thread)
1357 kthread_stop(thread);
1358
1359 if (crc_eof)
1360 put_page(crc_eof);
1361}
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373static int fcoe_cpu_callback(struct notifier_block *nfb,
1374 unsigned long action, void *hcpu)
1375{
1376 unsigned cpu = (unsigned long)hcpu;
1377
1378 switch (action) {
1379 case CPU_ONLINE:
1380 case CPU_ONLINE_FROZEN:
1381 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu);
1382 fcoe_percpu_thread_create(cpu);
1383 break;
1384 case CPU_DEAD:
1385 case CPU_DEAD_FROZEN:
1386 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu);
1387 fcoe_percpu_thread_destroy(cpu);
1388 break;
1389 default:
1390 break;
1391 }
1392 return NOTIFY_OK;
1393}
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404static inline unsigned int fcoe_select_cpu(void)
1405{
1406 static unsigned int selected_cpu;
1407
1408 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask);
1409 if (selected_cpu >= nr_cpu_ids)
1410 selected_cpu = cpumask_first(cpu_online_mask);
1411
1412 return selected_cpu;
1413}
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
1428 struct packet_type *ptype, struct net_device *olddev)
1429{
1430 struct fc_lport *lport;
1431 struct fcoe_rcv_info *fr;
1432 struct fcoe_ctlr *ctlr;
1433 struct fcoe_interface *fcoe;
1434 struct fc_frame_header *fh;
1435 struct fcoe_percpu_s *fps;
1436 struct ethhdr *eh;
1437 unsigned int cpu;
1438
1439 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
1440 ctlr = fcoe_to_ctlr(fcoe);
1441 lport = ctlr->lp;
1442 if (unlikely(!lport)) {
1443 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure");
1444 goto err2;
1445 }
1446 if (!lport->link_up)
1447 goto err2;
1448
1449 FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p "
1450 "data:%p tail:%p end:%p sum:%d dev:%s",
1451 skb->len, skb->data_len, skb->head, skb->data,
1452 skb_tail_pointer(skb), skb_end_pointer(skb),
1453 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
1454
1455 eh = eth_hdr(skb);
1456
1457 if (is_fip_mode(ctlr) &&
1458 compare_ether_addr(eh->h_source, ctlr->dest_addr)) {
1459 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
1460 eh->h_source);
1461 goto err;
1462 }
1463
1464
1465
1466
1467
1468 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1469 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
1470 goto err;
1471
1472 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1473 fh = (struct fc_frame_header *) skb_transport_header(skb);
1474
1475 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) {
1476 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n",
1477 eh->h_dest);
1478 goto err;
1479 }
1480
1481 fr = fcoe_dev_from_skb(skb);
1482 fr->fr_dev = lport;
1483
1484
1485
1486
1487
1488
1489
1490
1491 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1492 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
1493 else {
1494 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)
1495 cpu = fcoe_select_cpu();
1496 else
1497 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask;
1498 }
1499
1500 if (cpu >= nr_cpu_ids)
1501 goto err;
1502
1503 fps = &per_cpu(fcoe_percpu, cpu);
1504 spin_lock(&fps->fcoe_rx_list.lock);
1505 if (unlikely(!fps->thread)) {
1506
1507
1508
1509
1510
1511 FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread "
1512 "ready for incoming skb- using first online "
1513 "CPU.\n");
1514
1515 spin_unlock(&fps->fcoe_rx_list.lock);
1516 cpu = cpumask_first(cpu_online_mask);
1517 fps = &per_cpu(fcoe_percpu, cpu);
1518 spin_lock(&fps->fcoe_rx_list.lock);
1519 if (!fps->thread) {
1520 spin_unlock(&fps->fcoe_rx_list.lock);
1521 goto err;
1522 }
1523 }
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538 __skb_queue_tail(&fps->fcoe_rx_list, skb);
1539 if (fps->thread->state == TASK_INTERRUPTIBLE)
1540 wake_up_process(fps->thread);
1541 spin_unlock(&fps->fcoe_rx_list.lock);
1542
1543 return 0;
1544err:
1545 per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++;
1546 put_cpu();
1547err2:
1548 kfree_skb(skb);
1549 return -1;
1550}
1551
1552
1553
1554
1555
1556
1557
1558
1559static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)
1560{
1561 struct fcoe_percpu_s *fps;
1562 int rc;
1563
1564 fps = &get_cpu_var(fcoe_percpu);
1565 rc = fcoe_get_paged_crc_eof(skb, tlen, fps);
1566 put_cpu_var(fcoe_percpu);
1567
1568 return rc;
1569}
1570
1571
1572
1573
1574
1575
1576
1577
1578static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
1579{
1580 int wlen;
1581 u32 crc;
1582 struct ethhdr *eh;
1583 struct fcoe_crc_eof *cp;
1584 struct sk_buff *skb;
1585 struct fc_stats *stats;
1586 struct fc_frame_header *fh;
1587 unsigned int hlen;
1588 unsigned int tlen;
1589 unsigned int elen;
1590 struct fcoe_port *port = lport_priv(lport);
1591 struct fcoe_interface *fcoe = port->priv;
1592 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
1593 u8 sof, eof;
1594 struct fcoe_hdr *hp;
1595
1596 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1597
1598 fh = fc_frame_header_get(fp);
1599 skb = fp_skb(fp);
1600 wlen = skb->len / FCOE_WORD_TO_BYTE;
1601
1602 if (!lport->link_up) {
1603 kfree_skb(skb);
1604 return 0;
1605 }
1606
1607 if (unlikely(fh->fh_type == FC_TYPE_ELS) &&
1608 fcoe_ctlr_els_send(ctlr, lport, skb))
1609 return 0;
1610
1611 sof = fr_sof(fp);
1612 eof = fr_eof(fp);
1613
1614 elen = sizeof(struct ethhdr);
1615 hlen = sizeof(struct fcoe_hdr);
1616 tlen = sizeof(struct fcoe_crc_eof);
1617 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1618
1619
1620 if (likely(lport->crc_offload)) {
1621 skb->ip_summed = CHECKSUM_UNNECESSARY;
1622 skb->csum_start = skb_headroom(skb);
1623 skb->csum_offset = skb->len;
1624 crc = 0;
1625 } else {
1626 skb->ip_summed = CHECKSUM_NONE;
1627 crc = fcoe_fc_crc(fp);
1628 }
1629
1630
1631 if (skb_is_nonlinear(skb)) {
1632 skb_frag_t *frag;
1633 if (fcoe_alloc_paged_crc_eof(skb, tlen)) {
1634 kfree_skb(skb);
1635 return -ENOMEM;
1636 }
1637 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1638 cp = kmap_atomic(skb_frag_page(frag))
1639 + frag->page_offset;
1640 } else {
1641 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
1642 }
1643
1644 memset(cp, 0, sizeof(*cp));
1645 cp->fcoe_eof = eof;
1646 cp->fcoe_crc32 = cpu_to_le32(~crc);
1647
1648 if (skb_is_nonlinear(skb)) {
1649 kunmap_atomic(cp);
1650 cp = NULL;
1651 }
1652
1653
1654 skb_push(skb, elen + hlen);
1655 skb_reset_mac_header(skb);
1656 skb_reset_network_header(skb);
1657 skb->mac_len = elen;
1658 skb->protocol = htons(ETH_P_FCOE);
1659 skb->priority = fcoe->priority;
1660
1661 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN &&
1662 fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) {
1663
1664 skb->dev = fcoe->realdev;
1665 skb = __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1666 vlan_dev_vlan_id(fcoe->netdev));
1667 if (!skb)
1668 return -ENOMEM;
1669 } else
1670 skb->dev = fcoe->netdev;
1671
1672
1673 eh = eth_hdr(skb);
1674 eh->h_proto = htons(ETH_P_FCOE);
1675 memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN);
1676 if (ctlr->map_dest)
1677 memcpy(eh->h_dest + 3, fh->fh_d_id, 3);
1678
1679 if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN))
1680 memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN);
1681 else
1682 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
1683
1684 hp = (struct fcoe_hdr *)(eh + 1);
1685 memset(hp, 0, sizeof(*hp));
1686 if (FC_FCOE_VER)
1687 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1688 hp->fcoe_sof = sof;
1689
1690
1691 if (lport->seq_offload && fr_max_payload(fp)) {
1692 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1693 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1694 } else {
1695 skb_shinfo(skb)->gso_type = 0;
1696 skb_shinfo(skb)->gso_size = 0;
1697 }
1698
1699 stats = per_cpu_ptr(lport->stats, get_cpu());
1700 stats->TxFrames++;
1701 stats->TxWords += wlen;
1702 put_cpu();
1703
1704
1705 fr_dev(fp) = lport;
1706 fcoe_port_send(port, skb);
1707 return 0;
1708}
1709
1710
1711
1712
1713
1714static void fcoe_percpu_flush_done(struct sk_buff *skb)
1715{
1716 complete(&fcoe_flush_completion);
1717}
1718
1719
1720
1721
1722
1723
1724
1725
1726static inline int fcoe_filter_frames(struct fc_lport *lport,
1727 struct fc_frame *fp)
1728{
1729 struct fcoe_ctlr *ctlr;
1730 struct fcoe_interface *fcoe;
1731 struct fc_frame_header *fh;
1732 struct sk_buff *skb = (struct sk_buff *)fp;
1733 struct fc_stats *stats;
1734
1735
1736
1737
1738
1739
1740 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
1741 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1742 else
1743 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1744
1745 fh = (struct fc_frame_header *) skb_transport_header(skb);
1746 fh = fc_frame_header_get(fp);
1747 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP)
1748 return 0;
1749
1750 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;
1751 ctlr = fcoe_to_ctlr(fcoe);
1752 if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
1753 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
1754 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1755 return -EINVAL;
1756 }
1757
1758 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) ||
1759 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) {
1760 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1761 return 0;
1762 }
1763
1764 stats = per_cpu_ptr(lport->stats, get_cpu());
1765 stats->InvalidCRCCount++;
1766 if (stats->InvalidCRCCount < 5)
1767 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
1768 put_cpu();
1769 return -EINVAL;
1770}
1771
1772
1773
1774
1775
1776static void fcoe_recv_frame(struct sk_buff *skb)
1777{
1778 u32 fr_len;
1779 struct fc_lport *lport;
1780 struct fcoe_rcv_info *fr;
1781 struct fc_stats *stats;
1782 struct fcoe_crc_eof crc_eof;
1783 struct fc_frame *fp;
1784 struct fcoe_port *port;
1785 struct fcoe_hdr *hp;
1786
1787 fr = fcoe_dev_from_skb(skb);
1788 lport = fr->fr_dev;
1789 if (unlikely(!lport)) {
1790 if (skb->destructor != fcoe_percpu_flush_done)
1791 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb");
1792 kfree_skb(skb);
1793 return;
1794 }
1795
1796 FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d "
1797 "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
1798 skb->len, skb->data_len,
1799 skb->head, skb->data, skb_tail_pointer(skb),
1800 skb_end_pointer(skb), skb->csum,
1801 skb->dev ? skb->dev->name : "<NULL>");
1802
1803 port = lport_priv(lport);
1804 skb_linearize(skb);
1805
1806
1807
1808
1809
1810 hp = (struct fcoe_hdr *) skb_network_header(skb);
1811
1812 stats = per_cpu_ptr(lport->stats, get_cpu());
1813 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1814 if (stats->ErrorFrames < 5)
1815 printk(KERN_WARNING "fcoe: FCoE version "
1816 "mismatch: The frame has "
1817 "version %x, but the "
1818 "initiator supports version "
1819 "%x\n", FC_FCOE_DECAPS_VER(hp),
1820 FC_FCOE_VER);
1821 goto drop;
1822 }
1823
1824 skb_pull(skb, sizeof(struct fcoe_hdr));
1825 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1826
1827 stats->RxFrames++;
1828 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1829
1830 fp = (struct fc_frame *)skb;
1831 fc_frame_init(fp);
1832 fr_dev(fp) = lport;
1833 fr_sof(fp) = hp->fcoe_sof;
1834
1835
1836 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof)))
1837 goto drop;
1838 fr_eof(fp) = crc_eof.fcoe_eof;
1839 fr_crc(fp) = crc_eof.fcoe_crc32;
1840 if (pskb_trim(skb, fr_len))
1841 goto drop;
1842
1843 if (!fcoe_filter_frames(lport, fp)) {
1844 put_cpu();
1845 fc_exch_recv(lport, fp);
1846 return;
1847 }
1848drop:
1849 stats->ErrorFrames++;
1850 put_cpu();
1851 kfree_skb(skb);
1852}
1853
1854
1855
1856
1857
1858
1859
1860static int fcoe_percpu_receive_thread(void *arg)
1861{
1862 struct fcoe_percpu_s *p = arg;
1863 struct sk_buff *skb;
1864 struct sk_buff_head tmp;
1865
1866 skb_queue_head_init(&tmp);
1867
1868 set_user_nice(current, -20);
1869
1870retry:
1871 while (!kthread_should_stop()) {
1872
1873 spin_lock_bh(&p->fcoe_rx_list.lock);
1874 skb_queue_splice_init(&p->fcoe_rx_list, &tmp);
1875
1876 if (!skb_queue_len(&tmp)) {
1877 set_current_state(TASK_INTERRUPTIBLE);
1878 spin_unlock_bh(&p->fcoe_rx_list.lock);
1879 schedule();
1880 set_current_state(TASK_RUNNING);
1881 goto retry;
1882 }
1883
1884 spin_unlock_bh(&p->fcoe_rx_list.lock);
1885
1886 while ((skb = __skb_dequeue(&tmp)) != NULL)
1887 fcoe_recv_frame(skb);
1888
1889 }
1890 return 0;
1891}
1892
1893
1894
1895
1896static void fcoe_dev_setup(void)
1897{
1898 register_dcbevent_notifier(&dcb_notifier);
1899 register_netdevice_notifier(&fcoe_notifier);
1900}
1901
1902
1903
1904
1905static void fcoe_dev_cleanup(void)
1906{
1907 unregister_dcbevent_notifier(&dcb_notifier);
1908 unregister_netdevice_notifier(&fcoe_notifier);
1909}
1910
1911static struct fcoe_interface *
1912fcoe_hostlist_lookup_realdev_port(struct net_device *netdev)
1913{
1914 struct fcoe_interface *fcoe;
1915 struct net_device *real_dev;
1916
1917 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1918 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
1919 real_dev = vlan_dev_real_dev(fcoe->netdev);
1920 else
1921 real_dev = fcoe->netdev;
1922
1923 if (netdev == real_dev)
1924 return fcoe;
1925 }
1926 return NULL;
1927}
1928
1929static int fcoe_dcb_app_notification(struct notifier_block *notifier,
1930 ulong event, void *ptr)
1931{
1932 struct dcb_app_type *entry = ptr;
1933 struct fcoe_ctlr *ctlr;
1934 struct fcoe_interface *fcoe;
1935 struct net_device *netdev;
1936 int prio;
1937
1938 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE)
1939 return NOTIFY_OK;
1940
1941 netdev = dev_get_by_index(&init_net, entry->ifindex);
1942 if (!netdev)
1943 return NOTIFY_OK;
1944
1945 fcoe = fcoe_hostlist_lookup_realdev_port(netdev);
1946 dev_put(netdev);
1947 if (!fcoe)
1948 return NOTIFY_OK;
1949
1950 ctlr = fcoe_to_ctlr(fcoe);
1951
1952 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE)
1953 prio = ffs(entry->app.priority) - 1;
1954 else
1955 prio = entry->app.priority;
1956
1957 if (prio < 0)
1958 return NOTIFY_OK;
1959
1960 if (entry->app.protocol == ETH_P_FIP ||
1961 entry->app.protocol == ETH_P_FCOE)
1962 ctlr->priority = prio;
1963
1964 if (entry->app.protocol == ETH_P_FCOE)
1965 fcoe->priority = prio;
1966
1967 return NOTIFY_OK;
1968}
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980static int fcoe_device_notification(struct notifier_block *notifier,
1981 ulong event, void *ptr)
1982{
1983 struct fcoe_ctlr_device *cdev;
1984 struct fc_lport *lport = NULL;
1985 struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
1986 struct fcoe_ctlr *ctlr;
1987 struct fcoe_interface *fcoe;
1988 struct fcoe_port *port;
1989 struct fc_stats *stats;
1990 u32 link_possible = 1;
1991 u32 mfs;
1992 int rc = NOTIFY_OK;
1993
1994 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1995 if (fcoe->netdev == netdev) {
1996 ctlr = fcoe_to_ctlr(fcoe);
1997 lport = ctlr->lp;
1998 break;
1999 }
2000 }
2001 if (!lport) {
2002 rc = NOTIFY_DONE;
2003 goto out;
2004 }
2005
2006 switch (event) {
2007 case NETDEV_DOWN:
2008 case NETDEV_GOING_DOWN:
2009 link_possible = 0;
2010 break;
2011 case NETDEV_UP:
2012 case NETDEV_CHANGE:
2013 break;
2014 case NETDEV_CHANGEMTU:
2015 if (netdev->features & NETIF_F_FCOE_MTU)
2016 break;
2017 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
2018 sizeof(struct fcoe_crc_eof));
2019 if (mfs >= FC_MIN_MAX_FRAME)
2020 fc_set_mfs(lport, mfs);
2021 break;
2022 case NETDEV_REGISTER:
2023 break;
2024 case NETDEV_UNREGISTER:
2025 list_del(&fcoe->list);
2026 port = lport_priv(ctlr->lp);
2027 queue_work(fcoe_wq, &port->destroy_work);
2028 goto out;
2029 break;
2030 case NETDEV_FEAT_CHANGE:
2031 fcoe_netdev_features_change(lport, netdev);
2032 break;
2033 default:
2034 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
2035 "from netdev netlink\n", event);
2036 }
2037
2038 fcoe_link_speed_update(lport);
2039
2040 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2041
2042 if (link_possible && !fcoe_link_ok(lport)) {
2043 switch (cdev->enabled) {
2044 case FCOE_CTLR_DISABLED:
2045 pr_info("Link up while interface is disabled.\n");
2046 break;
2047 case FCOE_CTLR_ENABLED:
2048 case FCOE_CTLR_UNUSED:
2049 fcoe_ctlr_link_up(ctlr);
2050 };
2051 } else if (fcoe_ctlr_link_down(ctlr)) {
2052 switch (cdev->enabled) {
2053 case FCOE_CTLR_DISABLED:
2054 pr_info("Link down while interface is disabled.\n");
2055 break;
2056 case FCOE_CTLR_ENABLED:
2057 case FCOE_CTLR_UNUSED:
2058 stats = per_cpu_ptr(lport->stats, get_cpu());
2059 stats->LinkFailureCount++;
2060 put_cpu();
2061 fcoe_clean_pending_queue(lport);
2062 };
2063 }
2064out:
2065 return rc;
2066}
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078static int fcoe_disable(struct net_device *netdev)
2079{
2080 struct fcoe_ctlr *ctlr;
2081 struct fcoe_interface *fcoe;
2082 int rc = 0;
2083
2084 mutex_lock(&fcoe_config_mutex);
2085
2086 rtnl_lock();
2087 fcoe = fcoe_hostlist_lookup_port(netdev);
2088 rtnl_unlock();
2089
2090 if (fcoe) {
2091 ctlr = fcoe_to_ctlr(fcoe);
2092 fcoe_ctlr_link_down(ctlr);
2093 fcoe_clean_pending_queue(ctlr->lp);
2094 } else
2095 rc = -ENODEV;
2096
2097 mutex_unlock(&fcoe_config_mutex);
2098 return rc;
2099}
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109static int fcoe_enable(struct net_device *netdev)
2110{
2111 struct fcoe_ctlr *ctlr;
2112 struct fcoe_interface *fcoe;
2113 int rc = 0;
2114
2115 mutex_lock(&fcoe_config_mutex);
2116 rtnl_lock();
2117 fcoe = fcoe_hostlist_lookup_port(netdev);
2118 rtnl_unlock();
2119
2120 if (!fcoe) {
2121 rc = -ENODEV;
2122 goto out;
2123 }
2124
2125 ctlr = fcoe_to_ctlr(fcoe);
2126
2127 if (!fcoe_link_ok(ctlr->lp))
2128 fcoe_ctlr_link_up(ctlr);
2129
2130out:
2131 mutex_unlock(&fcoe_config_mutex);
2132 return rc;
2133}
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev)
2146{
2147 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev);
2148 struct fc_lport *lport = ctlr->lp;
2149 struct net_device *netdev = fcoe_netdev(lport);
2150
2151 switch (cdev->enabled) {
2152 case FCOE_CTLR_ENABLED:
2153 return fcoe_enable(netdev);
2154 case FCOE_CTLR_DISABLED:
2155 return fcoe_disable(netdev);
2156 case FCOE_CTLR_UNUSED:
2157 default:
2158 return -ENOTSUPP;
2159 };
2160}
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170static int fcoe_destroy(struct net_device *netdev)
2171{
2172 struct fcoe_ctlr *ctlr;
2173 struct fcoe_interface *fcoe;
2174 struct fc_lport *lport;
2175 struct fcoe_port *port;
2176 int rc = 0;
2177
2178 mutex_lock(&fcoe_config_mutex);
2179 rtnl_lock();
2180 fcoe = fcoe_hostlist_lookup_port(netdev);
2181 if (!fcoe) {
2182 rc = -ENODEV;
2183 goto out_nodev;
2184 }
2185 ctlr = fcoe_to_ctlr(fcoe);
2186 lport = ctlr->lp;
2187 port = lport_priv(lport);
2188 list_del(&fcoe->list);
2189 queue_work(fcoe_wq, &port->destroy_work);
2190out_nodev:
2191 rtnl_unlock();
2192 mutex_unlock(&fcoe_config_mutex);
2193 return rc;
2194}
2195
2196
2197
2198
2199
2200static void fcoe_destroy_work(struct work_struct *work)
2201{
2202 struct fcoe_ctlr_device *cdev;
2203 struct fcoe_ctlr *ctlr;
2204 struct fcoe_port *port;
2205 struct fcoe_interface *fcoe;
2206 struct Scsi_Host *shost;
2207 struct fc_host_attrs *fc_host;
2208 unsigned long flags;
2209 struct fc_vport *vport;
2210 struct fc_vport *next_vport;
2211
2212 port = container_of(work, struct fcoe_port, destroy_work);
2213 shost = port->lport->host;
2214 fc_host = shost_to_fc_host(shost);
2215
2216
2217 spin_lock_irqsave(shost->host_lock, flags);
2218 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
2219 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
2220 continue;
2221 } else {
2222 vport->flags |= FC_VPORT_DELETING;
2223 queue_work(fc_host_work_q(shost),
2224 &vport->vport_delete_work);
2225 }
2226 }
2227 spin_unlock_irqrestore(shost->host_lock, flags);
2228
2229 flush_workqueue(fc_host_work_q(shost));
2230
2231 mutex_lock(&fcoe_config_mutex);
2232
2233 fcoe = port->priv;
2234 ctlr = fcoe_to_ctlr(fcoe);
2235 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2236
2237 fcoe_if_destroy(port->lport);
2238 fcoe_interface_cleanup(fcoe);
2239
2240 mutex_unlock(&fcoe_config_mutex);
2241
2242 fcoe_ctlr_device_delete(cdev);
2243}
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254static bool fcoe_match(struct net_device *netdev)
2255{
2256 return true;
2257}
2258
2259
2260
2261
2262
2263
2264
2265static void fcoe_dcb_create(struct fcoe_interface *fcoe)
2266{
2267#ifdef CONFIG_DCB
2268 int dcbx;
2269 u8 fup, up;
2270 struct net_device *netdev = fcoe->realdev;
2271 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2272 struct dcb_app app = {
2273 .priority = 0,
2274 .protocol = ETH_P_FCOE
2275 };
2276
2277
2278 if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) {
2279 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
2280
2281 if (dcbx & DCB_CAP_DCBX_VER_IEEE) {
2282 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
2283 up = dcb_ieee_getapp_mask(netdev, &app);
2284 app.protocol = ETH_P_FIP;
2285 fup = dcb_ieee_getapp_mask(netdev, &app);
2286 } else {
2287 app.selector = DCB_APP_IDTYPE_ETHTYPE;
2288 up = dcb_getapp(netdev, &app);
2289 app.protocol = ETH_P_FIP;
2290 fup = dcb_getapp(netdev, &app);
2291 }
2292
2293 fcoe->priority = ffs(up) ? ffs(up) - 1 : 0;
2294 ctlr->priority = ffs(fup) ? ffs(fup) - 1 : fcoe->priority;
2295 }
2296#endif
2297}
2298
2299enum fcoe_create_link_state {
2300 FCOE_CREATE_LINK_DOWN,
2301 FCOE_CREATE_LINK_UP,
2302};
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317static int _fcoe_create(struct net_device *netdev, enum fip_state fip_mode,
2318 enum fcoe_create_link_state link_state)
2319{
2320 int rc = 0;
2321 struct fcoe_ctlr_device *ctlr_dev;
2322 struct fcoe_ctlr *ctlr;
2323 struct fcoe_interface *fcoe;
2324 struct fc_lport *lport;
2325
2326 mutex_lock(&fcoe_config_mutex);
2327 rtnl_lock();
2328
2329
2330 if (fcoe_hostlist_lookup(netdev)) {
2331 rc = -EEXIST;
2332 goto out_nodev;
2333 }
2334
2335 fcoe = fcoe_interface_create(netdev, fip_mode);
2336 if (IS_ERR(fcoe)) {
2337 rc = PTR_ERR(fcoe);
2338 goto out_nodev;
2339 }
2340
2341 ctlr = fcoe_to_ctlr(fcoe);
2342 ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr);
2343 lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0);
2344 if (IS_ERR(lport)) {
2345 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
2346 netdev->name);
2347 rc = -EIO;
2348 rtnl_unlock();
2349 fcoe_interface_cleanup(fcoe);
2350 mutex_unlock(&fcoe_config_mutex);
2351 fcoe_ctlr_device_delete(ctlr_dev);
2352 goto out;
2353 }
2354
2355
2356 ctlr->lp = lport;
2357
2358
2359 fcoe_dcb_create(fcoe);
2360
2361
2362 lport->boot_time = jiffies;
2363 fc_fabric_login(lport);
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377 if (link_state == FCOE_CREATE_LINK_UP)
2378 ctlr_dev->enabled = FCOE_CTLR_ENABLED;
2379 else
2380 ctlr_dev->enabled = FCOE_CTLR_DISABLED;
2381
2382 if (link_state == FCOE_CREATE_LINK_UP &&
2383 !fcoe_link_ok(lport)) {
2384 rtnl_unlock();
2385 fcoe_ctlr_link_up(ctlr);
2386 mutex_unlock(&fcoe_config_mutex);
2387 return rc;
2388 }
2389
2390out_nodev:
2391 rtnl_unlock();
2392 mutex_unlock(&fcoe_config_mutex);
2393out:
2394 return rc;
2395}
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode)
2407{
2408 return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP);
2409}
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422static int fcoe_ctlr_alloc(struct net_device *netdev)
2423{
2424 return _fcoe_create(netdev, FIP_MODE_FABRIC,
2425 FCOE_CREATE_LINK_DOWN);
2426}
2427
2428
2429
2430
2431
2432
2433
2434
2435static int fcoe_link_ok(struct fc_lport *lport)
2436{
2437 struct net_device *netdev = fcoe_netdev(lport);
2438
2439 if (netif_oper_up(netdev))
2440 return 0;
2441 return -1;
2442}
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455static void fcoe_percpu_clean(struct fc_lport *lport)
2456{
2457 struct fcoe_percpu_s *pp;
2458 struct sk_buff *skb;
2459 unsigned int cpu;
2460
2461 for_each_possible_cpu(cpu) {
2462 pp = &per_cpu(fcoe_percpu, cpu);
2463
2464 if (!pp->thread || !cpu_online(cpu))
2465 continue;
2466
2467 skb = dev_alloc_skb(0);
2468 if (!skb)
2469 continue;
2470
2471 skb->destructor = fcoe_percpu_flush_done;
2472
2473 spin_lock_bh(&pp->fcoe_rx_list.lock);
2474 __skb_queue_tail(&pp->fcoe_rx_list, skb);
2475 if (pp->fcoe_rx_list.qlen == 1)
2476 wake_up_process(pp->thread);
2477 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2478
2479 wait_for_completion(&fcoe_flush_completion);
2480 }
2481}
2482
2483
2484
2485
2486
2487
2488
2489static int fcoe_reset(struct Scsi_Host *shost)
2490{
2491 struct fc_lport *lport = shost_priv(shost);
2492 struct fcoe_port *port = lport_priv(lport);
2493 struct fcoe_interface *fcoe = port->priv;
2494 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2495 struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2496
2497 fcoe_ctlr_link_down(ctlr);
2498 fcoe_clean_pending_queue(ctlr->lp);
2499
2500 if (cdev->enabled != FCOE_CTLR_DISABLED &&
2501 !fcoe_link_ok(ctlr->lp))
2502 fcoe_ctlr_link_up(ctlr);
2503 return 0;
2504}
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514static struct fcoe_interface *
2515fcoe_hostlist_lookup_port(const struct net_device *netdev)
2516{
2517 struct fcoe_interface *fcoe;
2518
2519 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
2520 if (fcoe->netdev == netdev)
2521 return fcoe;
2522 }
2523 return NULL;
2524}
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
2536{
2537 struct fcoe_ctlr *ctlr;
2538 struct fcoe_interface *fcoe;
2539
2540 fcoe = fcoe_hostlist_lookup_port(netdev);
2541 ctlr = fcoe_to_ctlr(fcoe);
2542 return (fcoe) ? ctlr->lp : NULL;
2543}
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554static int fcoe_hostlist_add(const struct fc_lport *lport)
2555{
2556 struct fcoe_interface *fcoe;
2557 struct fcoe_port *port;
2558
2559 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2560 if (!fcoe) {
2561 port = lport_priv(lport);
2562 fcoe = port->priv;
2563 list_add_tail(&fcoe->list, &fcoe_hostlist);
2564 }
2565 return 0;
2566}
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576static void fcoe_hostlist_del(const struct fc_lport *lport)
2577{
2578 struct fcoe_interface *fcoe;
2579 struct fcoe_port *port;
2580
2581 port = lport_priv(lport);
2582 fcoe = port->priv;
2583 list_del(&fcoe->list);
2584 return;
2585}
2586
2587static struct fcoe_transport fcoe_sw_transport = {
2588 .name = {FCOE_TRANSPORT_DEFAULT},
2589 .attached = false,
2590 .list = LIST_HEAD_INIT(fcoe_sw_transport.list),
2591 .match = fcoe_match,
2592 .alloc = fcoe_ctlr_alloc,
2593 .create = fcoe_create,
2594 .destroy = fcoe_destroy,
2595 .enable = fcoe_enable,
2596 .disable = fcoe_disable,
2597};
2598
2599
2600
2601
2602
2603
2604static int __init fcoe_init(void)
2605{
2606 struct fcoe_percpu_s *p;
2607 unsigned int cpu;
2608 int rc = 0;
2609
2610 fcoe_wq = alloc_workqueue("fcoe", 0, 0);
2611 if (!fcoe_wq)
2612 return -ENOMEM;
2613
2614
2615 rc = fcoe_transport_attach(&fcoe_sw_transport);
2616 if (rc) {
2617 printk(KERN_ERR "failed to register an fcoe transport, check "
2618 "if libfcoe is loaded\n");
2619 return rc;
2620 }
2621
2622 mutex_lock(&fcoe_config_mutex);
2623
2624 for_each_possible_cpu(cpu) {
2625 p = &per_cpu(fcoe_percpu, cpu);
2626 skb_queue_head_init(&p->fcoe_rx_list);
2627 }
2628
2629 for_each_online_cpu(cpu)
2630 fcoe_percpu_thread_create(cpu);
2631
2632
2633 rc = register_hotcpu_notifier(&fcoe_cpu_notifier);
2634 if (rc)
2635 goto out_free;
2636
2637
2638 fcoe_dev_setup();
2639
2640 rc = fcoe_if_init();
2641 if (rc)
2642 goto out_free;
2643
2644 mutex_unlock(&fcoe_config_mutex);
2645 return 0;
2646
2647out_free:
2648 for_each_online_cpu(cpu) {
2649 fcoe_percpu_thread_destroy(cpu);
2650 }
2651 mutex_unlock(&fcoe_config_mutex);
2652 destroy_workqueue(fcoe_wq);
2653 return rc;
2654}
2655module_init(fcoe_init);
2656
2657
2658
2659
2660
2661
2662static void __exit fcoe_exit(void)
2663{
2664 struct fcoe_interface *fcoe, *tmp;
2665 struct fcoe_ctlr *ctlr;
2666 struct fcoe_port *port;
2667 unsigned int cpu;
2668
2669 mutex_lock(&fcoe_config_mutex);
2670
2671 fcoe_dev_cleanup();
2672
2673
2674 rtnl_lock();
2675 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
2676 ctlr = fcoe_to_ctlr(fcoe);
2677 port = lport_priv(ctlr->lp);
2678 fcoe_hostlist_del(port->lport);
2679 queue_work(fcoe_wq, &port->destroy_work);
2680 }
2681 rtnl_unlock();
2682
2683 unregister_hotcpu_notifier(&fcoe_cpu_notifier);
2684
2685 for_each_online_cpu(cpu)
2686 fcoe_percpu_thread_destroy(cpu);
2687
2688 mutex_unlock(&fcoe_config_mutex);
2689
2690
2691
2692
2693
2694 destroy_workqueue(fcoe_wq);
2695
2696
2697
2698
2699
2700
2701 fcoe_if_exit();
2702
2703
2704 fcoe_transport_detach(&fcoe_sw_transport);
2705}
2706module_exit(fcoe_exit);
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2718{
2719 struct fcoe_ctlr *fip = arg;
2720 struct fc_exch *exch = fc_seq_exch(seq);
2721 struct fc_lport *lport = exch->lp;
2722 u8 *mac;
2723
2724 if (IS_ERR(fp))
2725 goto done;
2726
2727 mac = fr_cb(fp)->granted_mac;
2728
2729 if (is_zero_ether_addr(mac))
2730 fcoe_ctlr_recv_flogi(fip, lport, fp);
2731 if (!is_zero_ether_addr(mac))
2732 fcoe_update_src_mac(lport, mac);
2733done:
2734 fc_lport_flogi_resp(seq, fp, lport);
2735}
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2747{
2748 struct fc_lport *lport = arg;
2749 static u8 zero_mac[ETH_ALEN] = { 0 };
2750
2751 if (!IS_ERR(fp))
2752 fcoe_update_src_mac(lport, zero_mac);
2753 fc_lport_logo_resp(seq, fp, lport);
2754}
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2766 struct fc_frame *fp, unsigned int op,
2767 void (*resp)(struct fc_seq *,
2768 struct fc_frame *,
2769 void *),
2770 void *arg, u32 timeout)
2771{
2772 struct fcoe_port *port = lport_priv(lport);
2773 struct fcoe_interface *fcoe = port->priv;
2774 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
2775 struct fc_frame_header *fh = fc_frame_header_get(fp);
2776
2777 switch (op) {
2778 case ELS_FLOGI:
2779 case ELS_FDISC:
2780 if (lport->point_to_multipoint)
2781 break;
2782 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2783 fip, timeout);
2784 case ELS_LOGO:
2785
2786 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2787 break;
2788 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
2789 lport, timeout);
2790 }
2791 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2792}
2793
2794
2795
2796
2797
2798
2799
2800
2801static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2802{
2803 struct Scsi_Host *shost = vport_to_shost(vport);
2804 struct fc_lport *n_port = shost_priv(shost);
2805 struct fcoe_port *port = lport_priv(n_port);
2806 struct fcoe_interface *fcoe = port->priv;
2807 struct net_device *netdev = fcoe->netdev;
2808 struct fc_lport *vn_port;
2809 int rc;
2810 char buf[32];
2811
2812 rc = fcoe_validate_vport_create(vport);
2813 if (rc) {
2814 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
2815 printk(KERN_ERR "fcoe: Failed to create vport, "
2816 "WWPN (0x%s) already exists\n",
2817 buf);
2818 return rc;
2819 }
2820
2821 mutex_lock(&fcoe_config_mutex);
2822 rtnl_lock();
2823 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
2824 rtnl_unlock();
2825 mutex_unlock(&fcoe_config_mutex);
2826
2827 if (IS_ERR(vn_port)) {
2828 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2829 netdev->name);
2830 return -EIO;
2831 }
2832
2833 if (disabled) {
2834 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2835 } else {
2836 vn_port->boot_time = jiffies;
2837 fc_fabric_login(vn_port);
2838 fc_vport_setlink(vn_port);
2839 }
2840 return 0;
2841}
2842
2843
2844
2845
2846
2847
2848
2849static int fcoe_vport_destroy(struct fc_vport *vport)
2850{
2851 struct Scsi_Host *shost = vport_to_shost(vport);
2852 struct fc_lport *n_port = shost_priv(shost);
2853 struct fc_lport *vn_port = vport->dd_data;
2854
2855 mutex_lock(&n_port->lp_mutex);
2856 list_del(&vn_port->list);
2857 mutex_unlock(&n_port->lp_mutex);
2858
2859 mutex_lock(&fcoe_config_mutex);
2860 fcoe_if_destroy(vn_port);
2861 mutex_unlock(&fcoe_config_mutex);
2862
2863 return 0;
2864}
2865
2866
2867
2868
2869
2870
2871static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2872{
2873 struct fc_lport *lport = vport->dd_data;
2874
2875 if (disable) {
2876 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2877 fc_fabric_logoff(lport);
2878 } else {
2879 lport->boot_time = jiffies;
2880 fc_fabric_login(lport);
2881 fc_vport_setlink(lport);
2882 }
2883
2884 return 0;
2885}
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2896{
2897 struct fc_lport *lport = vport->dd_data;
2898 struct fc_frame *fp;
2899 size_t len;
2900
2901 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2902 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2903 fcoe_netdev(lport)->name, vport->symbolic_name);
2904
2905 if (lport->state != LPORT_ST_READY)
2906 return;
2907
2908 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2909 fp = fc_frame_alloc(lport,
2910 sizeof(struct fc_ct_hdr) +
2911 sizeof(struct fc_ns_rspn) + len);
2912 if (!fp)
2913 return;
2914 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
2915 NULL, NULL, 3 * lport->r_a_tov);
2916}
2917
2918static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev)
2919{
2920 struct fcoe_ctlr_device *ctlr_dev =
2921 fcoe_fcf_dev_to_ctlr_dev(fcf_dev);
2922 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
2923 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);
2924
2925 fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev);
2926}
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940static void fcoe_set_port_id(struct fc_lport *lport,
2941 u32 port_id, struct fc_frame *fp)
2942{
2943 struct fcoe_port *port = lport_priv(lport);
2944 struct fcoe_interface *fcoe = port->priv;
2945 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2946
2947 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
2948 fcoe_ctlr_recv_flogi(ctlr, lport, fp);
2949}
2950