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