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20#include <linux/module.h>
21#include <linux/version.h>
22#include <linux/spinlock.h>
23#include <linux/netdevice.h>
24#include <linux/etherdevice.h>
25#include <linux/ethtool.h>
26#include <linux/if_ether.h>
27#include <linux/if_vlan.h>
28#include <linux/crc32.h>
29#include <linux/cpu.h>
30#include <linux/fs.h>
31#include <linux/sysfs.h>
32#include <linux/ctype.h>
33#include <scsi/scsi_tcq.h>
34#include <scsi/scsicam.h>
35#include <scsi/scsi_transport.h>
36#include <scsi/scsi_transport_fc.h>
37#include <net/rtnetlink.h>
38
39#include <scsi/fc/fc_encaps.h>
40#include <scsi/fc/fc_fip.h>
41
42#include <scsi/libfc.h>
43#include <scsi/fc_frame.h>
44#include <scsi/libfcoe.h>
45
46#include "fcoe.h"
47
48MODULE_AUTHOR("Open-FCoE.org");
49MODULE_DESCRIPTION("FCoE");
50MODULE_LICENSE("GPL v2");
51
52
53static unsigned int fcoe_ddp_min;
54module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR);
55MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \
56 "Direct Data Placement (DDP).");
57
58DEFINE_MUTEX(fcoe_config_mutex);
59
60
61static DECLARE_COMPLETION(fcoe_flush_completion);
62
63
64
65LIST_HEAD(fcoe_hostlist);
66DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
67
68
69static int fcoe_reset(struct Scsi_Host *shost);
70static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
71static int fcoe_rcv(struct sk_buff *, struct net_device *,
72 struct packet_type *, struct net_device *);
73static int fcoe_percpu_receive_thread(void *arg);
74static void fcoe_clean_pending_queue(struct fc_lport *lp);
75static void fcoe_percpu_clean(struct fc_lport *lp);
76static int fcoe_link_ok(struct fc_lport *lp);
77
78static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
79static int fcoe_hostlist_add(const struct fc_lport *);
80
81static void fcoe_check_wait_queue(struct fc_lport *, struct sk_buff *);
82static int fcoe_device_notification(struct notifier_block *, ulong, void *);
83static void fcoe_dev_setup(void);
84static void fcoe_dev_cleanup(void);
85static struct fcoe_interface *
86 fcoe_hostlist_lookup_port(const struct net_device *dev);
87
88
89static struct notifier_block fcoe_notifier = {
90 .notifier_call = fcoe_device_notification,
91};
92
93static struct scsi_transport_template *scsi_transport_fcoe_sw;
94
95struct fc_function_template fcoe_transport_function = {
96 .show_host_node_name = 1,
97 .show_host_port_name = 1,
98 .show_host_supported_classes = 1,
99 .show_host_supported_fc4s = 1,
100 .show_host_active_fc4s = 1,
101 .show_host_maxframe_size = 1,
102
103 .show_host_port_id = 1,
104 .show_host_supported_speeds = 1,
105 .get_host_speed = fc_get_host_speed,
106 .show_host_speed = 1,
107 .show_host_port_type = 1,
108 .get_host_port_state = fc_get_host_port_state,
109 .show_host_port_state = 1,
110 .show_host_symbolic_name = 1,
111
112 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
113 .show_rport_maxframe_size = 1,
114 .show_rport_supported_classes = 1,
115
116 .show_host_fabric_name = 1,
117 .show_starget_node_name = 1,
118 .show_starget_port_name = 1,
119 .show_starget_port_id = 1,
120 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
121 .show_rport_dev_loss_tmo = 1,
122 .get_fc_host_stats = fc_get_host_stats,
123 .issue_fc_host_lip = fcoe_reset,
124
125 .terminate_rport_io = fc_rport_terminate_io,
126};
127
128static struct scsi_host_template fcoe_shost_template = {
129 .module = THIS_MODULE,
130 .name = "FCoE Driver",
131 .proc_name = FCOE_NAME,
132 .queuecommand = fc_queuecommand,
133 .eh_abort_handler = fc_eh_abort,
134 .eh_device_reset_handler = fc_eh_device_reset,
135 .eh_host_reset_handler = fc_eh_host_reset,
136 .slave_alloc = fc_slave_alloc,
137 .change_queue_depth = fc_change_queue_depth,
138 .change_queue_type = fc_change_queue_type,
139 .this_id = -1,
140 .cmd_per_lun = 32,
141 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
142 .use_clustering = ENABLE_CLUSTERING,
143 .sg_tablesize = SG_ALL,
144 .max_sectors = 0xffff,
145};
146
147static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *dev,
148 struct packet_type *ptype,
149 struct net_device *orig_dev);
150
151
152
153
154
155
156
157
158static int fcoe_interface_setup(struct fcoe_interface *fcoe,
159 struct net_device *netdev)
160{
161 struct fcoe_ctlr *fip = &fcoe->ctlr;
162 struct netdev_hw_addr *ha;
163 u8 flogi_maddr[ETH_ALEN];
164
165 fcoe->netdev = netdev;
166
167
168 if ((netdev->priv_flags & IFF_MASTER_ALB) ||
169 (netdev->priv_flags & IFF_SLAVE_INACTIVE) ||
170 (netdev->priv_flags & IFF_MASTER_8023AD)) {
171 return -EOPNOTSUPP;
172 }
173
174
175
176 rcu_read_lock();
177 for_each_dev_addr(netdev, ha) {
178 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
179 (is_valid_ether_addr(fip->ctl_src_addr))) {
180 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
181 fip->spma = 1;
182 break;
183 }
184 }
185 rcu_read_unlock();
186
187
188 if (!fip->spma)
189 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
190
191
192
193
194
195
196 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
197 dev_unicast_add(netdev, flogi_maddr);
198 if (fip->spma)
199 dev_unicast_add(netdev, fip->ctl_src_addr);
200 dev_mc_add(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0);
201
202
203
204
205
206 fcoe->fcoe_packet_type.func = fcoe_rcv;
207 fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
208 fcoe->fcoe_packet_type.dev = netdev;
209 dev_add_pack(&fcoe->fcoe_packet_type);
210
211 fcoe->fip_packet_type.func = fcoe_fip_recv;
212 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
213 fcoe->fip_packet_type.dev = netdev;
214 dev_add_pack(&fcoe->fip_packet_type);
215
216 return 0;
217}
218
219static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb);
220static void fcoe_update_src_mac(struct fcoe_ctlr *fip, u8 *old, u8 *new);
221static void fcoe_destroy_work(struct work_struct *work);
222
223
224
225
226
227
228
229static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev)
230{
231 struct fcoe_interface *fcoe;
232
233 fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL);
234 if (!fcoe) {
235 FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n");
236 return NULL;
237 }
238
239 dev_hold(netdev);
240 kref_init(&fcoe->kref);
241
242
243
244
245 fcoe_ctlr_init(&fcoe->ctlr);
246 fcoe->ctlr.send = fcoe_fip_send;
247 fcoe->ctlr.update_mac = fcoe_update_src_mac;
248
249 fcoe_interface_setup(fcoe, netdev);
250
251 return fcoe;
252}
253
254
255
256
257
258
259
260void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
261{
262 struct net_device *netdev = fcoe->netdev;
263 struct fcoe_ctlr *fip = &fcoe->ctlr;
264 u8 flogi_maddr[ETH_ALEN];
265
266
267
268
269
270
271
272 __dev_remove_pack(&fcoe->fcoe_packet_type);
273 __dev_remove_pack(&fcoe->fip_packet_type);
274 synchronize_net();
275
276
277 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
278 dev_unicast_delete(netdev, flogi_maddr);
279 if (!is_zero_ether_addr(fip->data_src_addr))
280 dev_unicast_delete(netdev, fip->data_src_addr);
281 if (fip->spma)
282 dev_unicast_delete(netdev, fip->ctl_src_addr);
283 dev_mc_delete(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0);
284}
285
286
287
288
289
290static void fcoe_interface_release(struct kref *kref)
291{
292 struct fcoe_interface *fcoe;
293 struct net_device *netdev;
294
295 fcoe = container_of(kref, struct fcoe_interface, kref);
296 netdev = fcoe->netdev;
297
298 fcoe_ctlr_destroy(&fcoe->ctlr);
299 kfree(fcoe);
300 dev_put(netdev);
301}
302
303
304
305
306
307static inline void fcoe_interface_get(struct fcoe_interface *fcoe)
308{
309 kref_get(&fcoe->kref);
310}
311
312
313
314
315
316static inline void fcoe_interface_put(struct fcoe_interface *fcoe)
317{
318 kref_put(&fcoe->kref, fcoe_interface_release);
319}
320
321
322
323
324
325
326
327
328
329
330static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *dev,
331 struct packet_type *ptype,
332 struct net_device *orig_dev)
333{
334 struct fcoe_interface *fcoe;
335
336 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
337 fcoe_ctlr_recv(&fcoe->ctlr, skb);
338 return 0;
339}
340
341
342
343
344
345
346static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
347{
348 skb->dev = fcoe_from_ctlr(fip)->netdev;
349 dev_queue_xmit(skb);
350}
351
352
353
354
355
356
357
358
359
360
361static void fcoe_update_src_mac(struct fcoe_ctlr *fip, u8 *old, u8 *new)
362{
363 struct fcoe_interface *fcoe;
364
365 fcoe = fcoe_from_ctlr(fip);
366 rtnl_lock();
367 if (!is_zero_ether_addr(old))
368 dev_unicast_delete(fcoe->netdev, old);
369 dev_unicast_add(fcoe->netdev, new);
370 rtnl_unlock();
371}
372
373
374
375
376
377
378
379static int fcoe_lport_config(struct fc_lport *lp)
380{
381 lp->link_up = 0;
382 lp->qfull = 0;
383 lp->max_retry_count = 3;
384 lp->max_rport_retry_count = 3;
385 lp->e_d_tov = 2 * 1000;
386 lp->r_a_tov = 2 * 2 * 1000;
387 lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
388 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
389
390 fc_lport_init_stats(lp);
391
392
393 fc_lport_config(lp);
394
395
396 lp->crc_offload = 0;
397 lp->seq_offload = 0;
398 lp->lro_enabled = 0;
399 lp->lro_xid = 0;
400 lp->lso_max = 0;
401
402 return 0;
403}
404
405
406
407
408
409
410
411
412static void fcoe_queue_timer(ulong lp)
413{
414 fcoe_check_wait_queue((struct fc_lport *)lp, NULL);
415}
416
417
418
419
420
421
422
423
424
425
426static int fcoe_netdev_config(struct fc_lport *lp, struct net_device *netdev)
427{
428 u32 mfs;
429 u64 wwnn, wwpn;
430 struct fcoe_interface *fcoe;
431 struct fcoe_port *port;
432
433
434 port = lport_priv(lp);
435 fcoe = port->fcoe;
436
437
438
439
440
441
442 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
443 sizeof(struct fcoe_crc_eof));
444 if (fc_set_mfs(lp, mfs))
445 return -EINVAL;
446
447
448 if (netdev->features & NETIF_F_SG)
449 lp->sg_supp = 1;
450
451 if (netdev->features & NETIF_F_FCOE_CRC) {
452 lp->crc_offload = 1;
453 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
454 }
455 if (netdev->features & NETIF_F_FSO) {
456 lp->seq_offload = 1;
457 lp->lso_max = netdev->gso_max_size;
458 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
459 lp->lso_max);
460 }
461 if (netdev->fcoe_ddp_xid) {
462 lp->lro_enabled = 1;
463 lp->lro_xid = netdev->fcoe_ddp_xid;
464 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
465 lp->lro_xid);
466 }
467 skb_queue_head_init(&port->fcoe_pending_queue);
468 port->fcoe_pending_queue_active = 0;
469 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lp);
470
471 wwnn = fcoe_wwn_from_mac(netdev->dev_addr, 1, 0);
472 fc_set_wwnn(lp, wwnn);
473
474 wwpn = fcoe_wwn_from_mac(netdev->dev_addr, 2, 0);
475 fc_set_wwpn(lp, wwpn);
476
477 return 0;
478}
479
480
481
482
483
484
485
486
487
488
489
490static int fcoe_shost_config(struct fc_lport *lp, struct Scsi_Host *shost,
491 struct device *dev)
492{
493 int rc = 0;
494
495
496 lp->host = shost;
497
498 lp->host->max_lun = FCOE_MAX_LUN;
499 lp->host->max_id = FCOE_MAX_FCP_TARGET;
500 lp->host->max_channel = 0;
501 lp->host->transportt = scsi_transport_fcoe_sw;
502
503
504 rc = scsi_add_host(lp->host, dev);
505 if (rc) {
506 FCOE_NETDEV_DBG(fcoe_netdev(lp), "fcoe_shost_config: "
507 "error on scsi_add_host\n");
508 return rc;
509 }
510 sprintf(fc_host_symbolic_name(lp->host), "%s v%s over %s",
511 FCOE_NAME, FCOE_VERSION,
512 fcoe_netdev(lp)->name);
513
514 return 0;
515}
516
517
518
519
520
521
522
523bool fcoe_oem_match(struct fc_frame *fp)
524{
525 return fc_fcp_is_read(fr_fsp(fp)) &&
526 (fr_fsp(fp)->data_len > fcoe_ddp_min);
527}
528
529
530
531
532
533
534
535static inline int fcoe_em_config(struct fc_lport *lp)
536{
537 struct fcoe_port *port = lport_priv(lp);
538 struct fcoe_interface *fcoe = port->fcoe;
539 struct fcoe_interface *oldfcoe = NULL;
540 struct net_device *old_real_dev, *cur_real_dev;
541 u16 min_xid = FCOE_MIN_XID;
542 u16 max_xid = FCOE_MAX_XID;
543
544
545
546
547
548 if (!lp->lro_enabled || !lp->lro_xid || (lp->lro_xid >= max_xid)) {
549 lp->lro_xid = 0;
550 goto skip_oem;
551 }
552
553
554
555
556
557 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
558 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
559 else
560 cur_real_dev = fcoe->netdev;
561
562 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
563 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
564 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
565 else
566 old_real_dev = oldfcoe->netdev;
567
568 if (cur_real_dev == old_real_dev) {
569 fcoe->oem = oldfcoe->oem;
570 break;
571 }
572 }
573
574 if (fcoe->oem) {
575 if (!fc_exch_mgr_add(lp, fcoe->oem, fcoe_oem_match)) {
576 printk(KERN_ERR "fcoe_em_config: failed to add "
577 "offload em:%p on interface:%s\n",
578 fcoe->oem, fcoe->netdev->name);
579 return -ENOMEM;
580 }
581 } else {
582 fcoe->oem = fc_exch_mgr_alloc(lp, FC_CLASS_3,
583 FCOE_MIN_XID, lp->lro_xid,
584 fcoe_oem_match);
585 if (!fcoe->oem) {
586 printk(KERN_ERR "fcoe_em_config: failed to allocate "
587 "em for offload exches on interface:%s\n",
588 fcoe->netdev->name);
589 return -ENOMEM;
590 }
591 }
592
593
594
595
596 min_xid += lp->lro_xid + 1;
597
598skip_oem:
599 if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, min_xid, max_xid, NULL)) {
600 printk(KERN_ERR "fcoe_em_config: failed to "
601 "allocate em on interface %s\n", fcoe->netdev->name);
602 return -ENOMEM;
603 }
604
605 return 0;
606}
607
608
609
610
611
612static void fcoe_if_destroy(struct fc_lport *lport)
613{
614 struct fcoe_port *port = lport_priv(lport);
615 struct fcoe_interface *fcoe = port->fcoe;
616 struct net_device *netdev = fcoe->netdev;
617
618 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
619
620
621 fc_fabric_logoff(lport);
622
623
624 fc_lport_destroy(lport);
625 fc_fcp_destroy(lport);
626
627
628 del_timer_sync(&port->timer);
629
630
631 fcoe_clean_pending_queue(lport);
632
633
634 fcoe_interface_put(fcoe);
635
636
637 fcoe_percpu_clean(lport);
638
639
640 fc_remove_host(lport->host);
641 scsi_remove_host(lport->host);
642
643
644 fc_exch_mgr_free(lport);
645
646
647 fc_lport_free_stats(lport);
648
649
650 scsi_host_put(lport->host);
651}
652
653
654
655
656
657
658
659
660
661
662static int fcoe_ddp_setup(struct fc_lport *lp, u16 xid,
663 struct scatterlist *sgl, unsigned int sgc)
664{
665 struct net_device *n = fcoe_netdev(lp);
666
667 if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_setup)
668 return n->netdev_ops->ndo_fcoe_ddp_setup(n, xid, sgl, sgc);
669
670 return 0;
671}
672
673
674
675
676
677
678
679
680static int fcoe_ddp_done(struct fc_lport *lp, u16 xid)
681{
682 struct net_device *n = fcoe_netdev(lp);
683
684 if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_done)
685 return n->netdev_ops->ndo_fcoe_ddp_done(n, xid);
686 return 0;
687}
688
689static struct libfc_function_template fcoe_libfc_fcn_templ = {
690 .frame_send = fcoe_xmit,
691 .ddp_setup = fcoe_ddp_setup,
692 .ddp_done = fcoe_ddp_done,
693};
694
695
696
697
698
699
700
701
702
703
704static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
705 struct device *parent)
706{
707 int rc;
708 struct fc_lport *lport = NULL;
709 struct fcoe_port *port;
710 struct Scsi_Host *shost;
711 struct net_device *netdev = fcoe->netdev;
712
713 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
714
715 shost = libfc_host_alloc(&fcoe_shost_template,
716 sizeof(struct fcoe_port));
717 if (!shost) {
718 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
719 rc = -ENOMEM;
720 goto out;
721 }
722 lport = shost_priv(shost);
723 port = lport_priv(lport);
724 port->lport = lport;
725 port->fcoe = fcoe;
726 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
727
728
729 rc = fcoe_lport_config(lport);
730 if (rc) {
731 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
732 "interface\n");
733 goto out_host_put;
734 }
735
736
737 rc = fcoe_netdev_config(lport, netdev);
738 if (rc) {
739 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
740 "interface\n");
741 goto out_lp_destroy;
742 }
743
744
745 rc = fcoe_shost_config(lport, shost, parent);
746 if (rc) {
747 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
748 "interface\n");
749 goto out_lp_destroy;
750 }
751
752
753 rc = fcoe_libfc_config(lport, &fcoe_libfc_fcn_templ);
754 if (rc) {
755 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
756 "interface\n");
757 goto out_lp_destroy;
758 }
759
760
761
762
763
764
765
766
767
768
769
770 rc = fcoe_em_config(lport);
771 if (rc) {
772 FCOE_NETDEV_DBG(netdev, "Could not configure the EM for the "
773 "interface\n");
774 goto out_lp_destroy;
775 }
776
777 fcoe_interface_get(fcoe);
778 return lport;
779
780out_lp_destroy:
781 fc_exch_mgr_free(lport);
782out_host_put:
783 scsi_host_put(lport->host);
784out:
785 return ERR_PTR(rc);
786}
787
788
789
790
791
792
793static int __init fcoe_if_init(void)
794{
795
796 scsi_transport_fcoe_sw =
797 fc_attach_transport(&fcoe_transport_function);
798
799 if (!scsi_transport_fcoe_sw) {
800 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
801 return -ENODEV;
802 }
803
804 return 0;
805}
806
807
808
809
810
811
812int __exit fcoe_if_exit(void)
813{
814 fc_release_transport(scsi_transport_fcoe_sw);
815 scsi_transport_fcoe_sw = NULL;
816 return 0;
817}
818
819
820
821
822
823static void fcoe_percpu_thread_create(unsigned int cpu)
824{
825 struct fcoe_percpu_s *p;
826 struct task_struct *thread;
827
828 p = &per_cpu(fcoe_percpu, cpu);
829
830 thread = kthread_create(fcoe_percpu_receive_thread,
831 (void *)p, "fcoethread/%d", cpu);
832
833 if (likely(!IS_ERR(thread))) {
834 kthread_bind(thread, cpu);
835 wake_up_process(thread);
836
837 spin_lock_bh(&p->fcoe_rx_list.lock);
838 p->thread = thread;
839 spin_unlock_bh(&p->fcoe_rx_list.lock);
840 }
841}
842
843
844
845
846
847
848
849
850
851static void fcoe_percpu_thread_destroy(unsigned int cpu)
852{
853 struct fcoe_percpu_s *p;
854 struct task_struct *thread;
855 struct page *crc_eof;
856 struct sk_buff *skb;
857#ifdef CONFIG_SMP
858 struct fcoe_percpu_s *p0;
859 unsigned targ_cpu = smp_processor_id();
860#endif
861
862 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu);
863
864
865 p = &per_cpu(fcoe_percpu, cpu);
866 spin_lock_bh(&p->fcoe_rx_list.lock);
867 thread = p->thread;
868 p->thread = NULL;
869 crc_eof = p->crc_eof_page;
870 p->crc_eof_page = NULL;
871 p->crc_eof_offset = 0;
872 spin_unlock_bh(&p->fcoe_rx_list.lock);
873
874#ifdef CONFIG_SMP
875
876
877
878
879
880 if (cpu != targ_cpu) {
881 p0 = &per_cpu(fcoe_percpu, targ_cpu);
882 spin_lock_bh(&p0->fcoe_rx_list.lock);
883 if (p0->thread) {
884 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
885 cpu, targ_cpu);
886
887 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
888 __skb_queue_tail(&p0->fcoe_rx_list, skb);
889 spin_unlock_bh(&p0->fcoe_rx_list.lock);
890 } else {
891
892
893
894
895
896 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
897 kfree_skb(skb);
898 spin_unlock_bh(&p0->fcoe_rx_list.lock);
899 }
900 } else {
901
902
903
904
905
906
907
908
909
910 spin_lock_bh(&p->fcoe_rx_list.lock);
911 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
912 kfree_skb(skb);
913 spin_unlock_bh(&p->fcoe_rx_list.lock);
914 }
915#else
916
917
918
919
920 spin_lock_bh(&p->fcoe_rx_list.lock);
921 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
922 kfree_skb(skb);
923 spin_unlock_bh(&p->fcoe_rx_list.lock);
924#endif
925
926 if (thread)
927 kthread_stop(thread);
928
929 if (crc_eof)
930 put_page(crc_eof);
931}
932
933
934
935
936
937
938
939
940
941
942
943static int fcoe_cpu_callback(struct notifier_block *nfb,
944 unsigned long action, void *hcpu)
945{
946 unsigned cpu = (unsigned long)hcpu;
947
948 switch (action) {
949 case CPU_ONLINE:
950 case CPU_ONLINE_FROZEN:
951 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu);
952 fcoe_percpu_thread_create(cpu);
953 break;
954 case CPU_DEAD:
955 case CPU_DEAD_FROZEN:
956 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu);
957 fcoe_percpu_thread_destroy(cpu);
958 break;
959 default:
960 break;
961 }
962 return NOTIFY_OK;
963}
964
965static struct notifier_block fcoe_cpu_notifier = {
966 .notifier_call = fcoe_cpu_callback,
967};
968
969
970
971
972
973
974
975
976
977
978
979
980int fcoe_rcv(struct sk_buff *skb, struct net_device *dev,
981 struct packet_type *ptype, struct net_device *olddev)
982{
983 struct fc_lport *lp;
984 struct fcoe_rcv_info *fr;
985 struct fcoe_interface *fcoe;
986 struct fc_frame_header *fh;
987 struct fcoe_percpu_s *fps;
988 unsigned int cpu;
989
990 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
991 lp = fcoe->ctlr.lp;
992 if (unlikely(lp == NULL)) {
993 FCOE_NETDEV_DBG(dev, "Cannot find hba structure");
994 goto err2;
995 }
996 if (!lp->link_up)
997 goto err2;
998
999 FCOE_NETDEV_DBG(dev, "skb_info: len:%d data_len:%d head:%p "
1000 "data:%p tail:%p end:%p sum:%d dev:%s",
1001 skb->len, skb->data_len, skb->head, skb->data,
1002 skb_tail_pointer(skb), skb_end_pointer(skb),
1003 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
1004
1005
1006 if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) {
1007 FCOE_NETDEV_DBG(dev, "Wrong FC type frame");
1008 goto err;
1009 }
1010
1011
1012
1013
1014
1015 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1016 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
1017 goto err;
1018
1019 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1020 fh = (struct fc_frame_header *) skb_transport_header(skb);
1021
1022 fr = fcoe_dev_from_skb(skb);
1023 fr->fr_dev = lp;
1024 fr->ptype = ptype;
1025
1026
1027
1028
1029
1030
1031
1032 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1033 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
1034 else
1035 cpu = smp_processor_id();
1036
1037 fps = &per_cpu(fcoe_percpu, cpu);
1038 spin_lock_bh(&fps->fcoe_rx_list.lock);
1039 if (unlikely(!fps->thread)) {
1040
1041
1042
1043
1044
1045 FCOE_NETDEV_DBG(dev, "CPU is online, but no receive thread "
1046 "ready for incoming skb- using first online "
1047 "CPU.\n");
1048
1049 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1050 cpu = first_cpu(cpu_online_map);
1051 fps = &per_cpu(fcoe_percpu, cpu);
1052 spin_lock_bh(&fps->fcoe_rx_list.lock);
1053 if (!fps->thread) {
1054 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1055 goto err;
1056 }
1057 }
1058
1059
1060
1061
1062
1063
1064 __skb_queue_tail(&fps->fcoe_rx_list, skb);
1065 if (fps->fcoe_rx_list.qlen == 1)
1066 wake_up_process(fps->thread);
1067
1068 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1069
1070 return 0;
1071err:
1072 fc_lport_get_stats(lp)->ErrorFrames++;
1073
1074err2:
1075 kfree_skb(skb);
1076 return -1;
1077}
1078
1079
1080
1081
1082
1083
1084
1085static inline int fcoe_start_io(struct sk_buff *skb)
1086{
1087 int rc;
1088
1089 skb_get(skb);
1090 rc = dev_queue_xmit(skb);
1091 if (rc != 0)
1092 return rc;
1093 kfree_skb(skb);
1094 return 0;
1095}
1096
1097
1098
1099
1100
1101
1102
1103
1104static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen)
1105{
1106 struct fcoe_percpu_s *fps;
1107 struct page *page;
1108
1109 fps = &get_cpu_var(fcoe_percpu);
1110 page = fps->crc_eof_page;
1111 if (!page) {
1112 page = alloc_page(GFP_ATOMIC);
1113 if (!page) {
1114 put_cpu_var(fcoe_percpu);
1115 return -ENOMEM;
1116 }
1117 fps->crc_eof_page = page;
1118 fps->crc_eof_offset = 0;
1119 }
1120
1121 get_page(page);
1122 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page,
1123 fps->crc_eof_offset, tlen);
1124 skb->len += tlen;
1125 skb->data_len += tlen;
1126 skb->truesize += tlen;
1127 fps->crc_eof_offset += sizeof(struct fcoe_crc_eof);
1128
1129 if (fps->crc_eof_offset >= PAGE_SIZE) {
1130 fps->crc_eof_page = NULL;
1131 fps->crc_eof_offset = 0;
1132 put_page(page);
1133 }
1134 put_cpu_var(fcoe_percpu);
1135 return 0;
1136}
1137
1138
1139
1140
1141
1142
1143
1144
1145u32 fcoe_fc_crc(struct fc_frame *fp)
1146{
1147 struct sk_buff *skb = fp_skb(fp);
1148 struct skb_frag_struct *frag;
1149 unsigned char *data;
1150 unsigned long off, len, clen;
1151 u32 crc;
1152 unsigned i;
1153
1154 crc = crc32(~0, skb->data, skb_headlen(skb));
1155
1156 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1157 frag = &skb_shinfo(skb)->frags[i];
1158 off = frag->page_offset;
1159 len = frag->size;
1160 while (len > 0) {
1161 clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK));
1162 data = kmap_atomic(frag->page + (off >> PAGE_SHIFT),
1163 KM_SKB_DATA_SOFTIRQ);
1164 crc = crc32(crc, data + (off & ~PAGE_MASK), clen);
1165 kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ);
1166 off += clen;
1167 len -= clen;
1168 }
1169 }
1170 return crc;
1171}
1172
1173
1174
1175
1176
1177
1178
1179
1180int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
1181{
1182 int wlen;
1183 u32 crc;
1184 struct ethhdr *eh;
1185 struct fcoe_crc_eof *cp;
1186 struct sk_buff *skb;
1187 struct fcoe_dev_stats *stats;
1188 struct fc_frame_header *fh;
1189 unsigned int hlen;
1190 unsigned int tlen;
1191 unsigned int elen;
1192 struct fcoe_port *port = lport_priv(lp);
1193 struct fcoe_interface *fcoe = port->fcoe;
1194 u8 sof, eof;
1195 struct fcoe_hdr *hp;
1196
1197 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1198
1199 fh = fc_frame_header_get(fp);
1200 skb = fp_skb(fp);
1201 wlen = skb->len / FCOE_WORD_TO_BYTE;
1202
1203 if (!lp->link_up) {
1204 kfree_skb(skb);
1205 return 0;
1206 }
1207
1208 if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
1209 fcoe_ctlr_els_send(&fcoe->ctlr, skb))
1210 return 0;
1211
1212 sof = fr_sof(fp);
1213 eof = fr_eof(fp);
1214
1215 elen = sizeof(struct ethhdr);
1216 hlen = sizeof(struct fcoe_hdr);
1217 tlen = sizeof(struct fcoe_crc_eof);
1218 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1219
1220
1221 if (likely(lp->crc_offload)) {
1222 skb->ip_summed = CHECKSUM_PARTIAL;
1223 skb->csum_start = skb_headroom(skb);
1224 skb->csum_offset = skb->len;
1225 crc = 0;
1226 } else {
1227 skb->ip_summed = CHECKSUM_NONE;
1228 crc = fcoe_fc_crc(fp);
1229 }
1230
1231
1232 if (skb_is_nonlinear(skb)) {
1233 skb_frag_t *frag;
1234 if (fcoe_get_paged_crc_eof(skb, tlen)) {
1235 kfree_skb(skb);
1236 return -ENOMEM;
1237 }
1238 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1239 cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ)
1240 + frag->page_offset;
1241 } else {
1242 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
1243 }
1244
1245 memset(cp, 0, sizeof(*cp));
1246 cp->fcoe_eof = eof;
1247 cp->fcoe_crc32 = cpu_to_le32(~crc);
1248
1249 if (skb_is_nonlinear(skb)) {
1250 kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ);
1251 cp = NULL;
1252 }
1253
1254
1255 skb_push(skb, elen + hlen);
1256 skb_reset_mac_header(skb);
1257 skb_reset_network_header(skb);
1258 skb->mac_len = elen;
1259 skb->protocol = htons(ETH_P_FCOE);
1260 skb->dev = fcoe->netdev;
1261
1262
1263 eh = eth_hdr(skb);
1264 eh->h_proto = htons(ETH_P_FCOE);
1265 if (fcoe->ctlr.map_dest)
1266 fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id);
1267 else
1268
1269 memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN);
1270
1271 if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN))
1272 memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN);
1273 else
1274 memcpy(eh->h_source, fcoe->ctlr.data_src_addr, ETH_ALEN);
1275
1276 hp = (struct fcoe_hdr *)(eh + 1);
1277 memset(hp, 0, sizeof(*hp));
1278 if (FC_FCOE_VER)
1279 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1280 hp->fcoe_sof = sof;
1281
1282
1283 if (lp->seq_offload && fr_max_payload(fp)) {
1284 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1285 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1286 } else {
1287 skb_shinfo(skb)->gso_type = 0;
1288 skb_shinfo(skb)->gso_size = 0;
1289 }
1290
1291 stats = fc_lport_get_stats(lp);
1292 stats->TxFrames++;
1293 stats->TxWords += wlen;
1294
1295
1296 fr_dev(fp) = lp;
1297 if (port->fcoe_pending_queue.qlen)
1298 fcoe_check_wait_queue(lp, skb);
1299 else if (fcoe_start_io(skb))
1300 fcoe_check_wait_queue(lp, skb);
1301
1302 return 0;
1303}
1304
1305
1306
1307
1308
1309static void fcoe_percpu_flush_done(struct sk_buff *skb)
1310{
1311 complete(&fcoe_flush_completion);
1312}
1313
1314
1315
1316
1317
1318
1319
1320int fcoe_percpu_receive_thread(void *arg)
1321{
1322 struct fcoe_percpu_s *p = arg;
1323 u32 fr_len;
1324 struct fc_lport *lp;
1325 struct fcoe_rcv_info *fr;
1326 struct fcoe_dev_stats *stats;
1327 struct fc_frame_header *fh;
1328 struct sk_buff *skb;
1329 struct fcoe_crc_eof crc_eof;
1330 struct fc_frame *fp;
1331 u8 *mac = NULL;
1332 struct fcoe_port *port;
1333 struct fcoe_hdr *hp;
1334
1335 set_user_nice(current, -20);
1336
1337 while (!kthread_should_stop()) {
1338
1339 spin_lock_bh(&p->fcoe_rx_list.lock);
1340 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) {
1341 set_current_state(TASK_INTERRUPTIBLE);
1342 spin_unlock_bh(&p->fcoe_rx_list.lock);
1343 schedule();
1344 set_current_state(TASK_RUNNING);
1345 if (kthread_should_stop())
1346 return 0;
1347 spin_lock_bh(&p->fcoe_rx_list.lock);
1348 }
1349 spin_unlock_bh(&p->fcoe_rx_list.lock);
1350 fr = fcoe_dev_from_skb(skb);
1351 lp = fr->fr_dev;
1352 if (unlikely(lp == NULL)) {
1353 if (skb->destructor != fcoe_percpu_flush_done)
1354 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb");
1355 kfree_skb(skb);
1356 continue;
1357 }
1358
1359 FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d "
1360 "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
1361 skb->len, skb->data_len,
1362 skb->head, skb->data, skb_tail_pointer(skb),
1363 skb_end_pointer(skb), skb->csum,
1364 skb->dev ? skb->dev->name : "<NULL>");
1365
1366
1367
1368
1369 port = lport_priv(lp);
1370 if (skb_is_nonlinear(skb))
1371 skb_linearize(skb);
1372 mac = eth_hdr(skb)->h_source;
1373
1374
1375
1376
1377
1378 hp = (struct fcoe_hdr *) skb_network_header(skb);
1379 fh = (struct fc_frame_header *) skb_transport_header(skb);
1380
1381 stats = fc_lport_get_stats(lp);
1382 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1383 if (stats->ErrorFrames < 5)
1384 printk(KERN_WARNING "fcoe: FCoE version "
1385 "mismatch: The frame has "
1386 "version %x, but the "
1387 "initiator supports version "
1388 "%x\n", FC_FCOE_DECAPS_VER(hp),
1389 FC_FCOE_VER);
1390 stats->ErrorFrames++;
1391 kfree_skb(skb);
1392 continue;
1393 }
1394
1395 skb_pull(skb, sizeof(struct fcoe_hdr));
1396 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1397
1398 stats->RxFrames++;
1399 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1400
1401 fp = (struct fc_frame *)skb;
1402 fc_frame_init(fp);
1403 fr_dev(fp) = lp;
1404 fr_sof(fp) = hp->fcoe_sof;
1405
1406
1407 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) {
1408 kfree_skb(skb);
1409 continue;
1410 }
1411 fr_eof(fp) = crc_eof.fcoe_eof;
1412 fr_crc(fp) = crc_eof.fcoe_crc32;
1413 if (pskb_trim(skb, fr_len)) {
1414 kfree_skb(skb);
1415 continue;
1416 }
1417
1418
1419
1420
1421
1422
1423 if (lp->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
1424 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1425 else
1426 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1427
1428 fh = fc_frame_header_get(fp);
1429 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
1430 fh->fh_type == FC_TYPE_FCP) {
1431 fc_exch_recv(lp, fp);
1432 continue;
1433 }
1434 if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) {
1435 if (le32_to_cpu(fr_crc(fp)) !=
1436 ~crc32(~0, skb->data, fr_len)) {
1437 if (stats->InvalidCRCCount < 5)
1438 printk(KERN_WARNING "fcoe: dropping "
1439 "frame with CRC error\n");
1440 stats->InvalidCRCCount++;
1441 stats->ErrorFrames++;
1442 fc_frame_free(fp);
1443 continue;
1444 }
1445 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1446 }
1447 if (unlikely(port->fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN) &&
1448 fcoe_ctlr_recv_flogi(&port->fcoe->ctlr, fp, mac)) {
1449 fc_frame_free(fp);
1450 continue;
1451 }
1452 fc_exch_recv(lp, fp);
1453 }
1454 return 0;
1455}
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470static void fcoe_check_wait_queue(struct fc_lport *lp, struct sk_buff *skb)
1471{
1472 struct fcoe_port *port = lport_priv(lp);
1473 int rc;
1474
1475 spin_lock_bh(&port->fcoe_pending_queue.lock);
1476
1477 if (skb)
1478 __skb_queue_tail(&port->fcoe_pending_queue, skb);
1479
1480 if (port->fcoe_pending_queue_active)
1481 goto out;
1482 port->fcoe_pending_queue_active = 1;
1483
1484 while (port->fcoe_pending_queue.qlen) {
1485
1486 port->fcoe_pending_queue.qlen++;
1487 skb = __skb_dequeue(&port->fcoe_pending_queue);
1488
1489 spin_unlock_bh(&port->fcoe_pending_queue.lock);
1490 rc = fcoe_start_io(skb);
1491 spin_lock_bh(&port->fcoe_pending_queue.lock);
1492
1493 if (rc) {
1494 __skb_queue_head(&port->fcoe_pending_queue, skb);
1495
1496 port->fcoe_pending_queue.qlen--;
1497 break;
1498 }
1499
1500 port->fcoe_pending_queue.qlen--;
1501 }
1502
1503 if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH)
1504 lp->qfull = 0;
1505 if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer))
1506 mod_timer(&port->timer, jiffies + 2);
1507 port->fcoe_pending_queue_active = 0;
1508out:
1509 if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH)
1510 lp->qfull = 1;
1511 spin_unlock_bh(&port->fcoe_pending_queue.lock);
1512 return;
1513}
1514
1515
1516
1517
1518static void fcoe_dev_setup(void)
1519{
1520 register_netdevice_notifier(&fcoe_notifier);
1521}
1522
1523
1524
1525
1526static void fcoe_dev_cleanup(void)
1527{
1528 unregister_netdevice_notifier(&fcoe_notifier);
1529}
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541static int fcoe_device_notification(struct notifier_block *notifier,
1542 ulong event, void *ptr)
1543{
1544 struct fc_lport *lp = NULL;
1545 struct net_device *netdev = ptr;
1546 struct fcoe_interface *fcoe;
1547 struct fcoe_port *port;
1548 struct fcoe_dev_stats *stats;
1549 u32 link_possible = 1;
1550 u32 mfs;
1551 int rc = NOTIFY_OK;
1552
1553 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1554 if (fcoe->netdev == netdev) {
1555 lp = fcoe->ctlr.lp;
1556 break;
1557 }
1558 }
1559 if (lp == NULL) {
1560 rc = NOTIFY_DONE;
1561 goto out;
1562 }
1563
1564 switch (event) {
1565 case NETDEV_DOWN:
1566 case NETDEV_GOING_DOWN:
1567 link_possible = 0;
1568 break;
1569 case NETDEV_UP:
1570 case NETDEV_CHANGE:
1571 break;
1572 case NETDEV_CHANGEMTU:
1573 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
1574 sizeof(struct fcoe_crc_eof));
1575 if (mfs >= FC_MIN_MAX_FRAME)
1576 fc_set_mfs(lp, mfs);
1577 break;
1578 case NETDEV_REGISTER:
1579 break;
1580 case NETDEV_UNREGISTER:
1581 list_del(&fcoe->list);
1582 port = lport_priv(fcoe->ctlr.lp);
1583 fcoe_interface_cleanup(fcoe);
1584 schedule_work(&port->destroy_work);
1585 goto out;
1586 break;
1587 default:
1588 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
1589 "from netdev netlink\n", event);
1590 }
1591 if (link_possible && !fcoe_link_ok(lp))
1592 fcoe_ctlr_link_up(&fcoe->ctlr);
1593 else if (fcoe_ctlr_link_down(&fcoe->ctlr)) {
1594 stats = fc_lport_get_stats(lp);
1595 stats->LinkFailureCount++;
1596 fcoe_clean_pending_queue(lp);
1597 }
1598out:
1599 return rc;
1600}
1601
1602
1603
1604
1605
1606
1607
1608static struct net_device *fcoe_if_to_netdev(const char *buffer)
1609{
1610 char *cp;
1611 char ifname[IFNAMSIZ + 2];
1612
1613 if (buffer) {
1614 strlcpy(ifname, buffer, IFNAMSIZ);
1615 cp = ifname + strlen(ifname);
1616 while (--cp >= ifname && *cp == '\n')
1617 *cp = '\0';
1618 return dev_get_by_name(&init_net, ifname);
1619 }
1620 return NULL;
1621}
1622
1623
1624
1625
1626
1627
1628
1629
1630static int fcoe_destroy(const char *buffer, struct kernel_param *kp)
1631{
1632 struct fcoe_interface *fcoe;
1633 struct net_device *netdev;
1634 int rc;
1635
1636 mutex_lock(&fcoe_config_mutex);
1637#ifdef CONFIG_FCOE_MODULE
1638
1639
1640
1641
1642
1643 if (THIS_MODULE->state != MODULE_STATE_LIVE) {
1644 rc = -ENODEV;
1645 goto out_nodev;
1646 }
1647#endif
1648
1649 netdev = fcoe_if_to_netdev(buffer);
1650 if (!netdev) {
1651 rc = -ENODEV;
1652 goto out_nodev;
1653 }
1654
1655 rtnl_lock();
1656 fcoe = fcoe_hostlist_lookup_port(netdev);
1657 if (!fcoe) {
1658 rtnl_unlock();
1659 rc = -ENODEV;
1660 goto out_putdev;
1661 }
1662 list_del(&fcoe->list);
1663 fcoe_interface_cleanup(fcoe);
1664 rtnl_unlock();
1665 fcoe_if_destroy(fcoe->ctlr.lp);
1666out_putdev:
1667 dev_put(netdev);
1668out_nodev:
1669 mutex_unlock(&fcoe_config_mutex);
1670 return rc;
1671}
1672
1673static void fcoe_destroy_work(struct work_struct *work)
1674{
1675 struct fcoe_port *port;
1676
1677 port = container_of(work, struct fcoe_port, destroy_work);
1678 mutex_lock(&fcoe_config_mutex);
1679 fcoe_if_destroy(port->lport);
1680 mutex_unlock(&fcoe_config_mutex);
1681}
1682
1683
1684
1685
1686
1687
1688
1689
1690static int fcoe_create(const char *buffer, struct kernel_param *kp)
1691{
1692 int rc;
1693 struct fcoe_interface *fcoe;
1694 struct fc_lport *lport;
1695 struct net_device *netdev;
1696
1697 mutex_lock(&fcoe_config_mutex);
1698#ifdef CONFIG_FCOE_MODULE
1699
1700
1701
1702
1703
1704 if (THIS_MODULE->state != MODULE_STATE_LIVE) {
1705 rc = -ENODEV;
1706 goto out_nodev;
1707 }
1708#endif
1709
1710 rtnl_lock();
1711 netdev = fcoe_if_to_netdev(buffer);
1712 if (!netdev) {
1713 rc = -ENODEV;
1714 goto out_nodev;
1715 }
1716
1717
1718 if (fcoe_hostlist_lookup(netdev)) {
1719 rc = -EEXIST;
1720 goto out_putdev;
1721 }
1722
1723 fcoe = fcoe_interface_create(netdev);
1724 if (!fcoe) {
1725 rc = -ENOMEM;
1726 goto out_putdev;
1727 }
1728
1729 lport = fcoe_if_create(fcoe, &netdev->dev);
1730 if (IS_ERR(lport)) {
1731 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
1732 netdev->name);
1733 rc = -EIO;
1734 fcoe_interface_cleanup(fcoe);
1735 goto out_free;
1736 }
1737
1738
1739 fcoe->ctlr.lp = lport;
1740
1741
1742 fcoe_hostlist_add(lport);
1743
1744
1745 lport->boot_time = jiffies;
1746 fc_fabric_login(lport);
1747 if (!fcoe_link_ok(lport))
1748 fcoe_ctlr_link_up(&fcoe->ctlr);
1749
1750 rc = 0;
1751out_free:
1752
1753
1754
1755
1756 fcoe_interface_put(fcoe);
1757out_putdev:
1758 dev_put(netdev);
1759out_nodev:
1760 rtnl_unlock();
1761 mutex_unlock(&fcoe_config_mutex);
1762 return rc;
1763}
1764
1765module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR);
1766__MODULE_PARM_TYPE(create, "string");
1767MODULE_PARM_DESC(create, "Create fcoe fcoe using net device passed in.");
1768module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR);
1769__MODULE_PARM_TYPE(destroy, "string");
1770MODULE_PARM_DESC(destroy, "Destroy fcoe fcoe");
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786int fcoe_link_ok(struct fc_lport *lp)
1787{
1788 struct fcoe_port *port = lport_priv(lp);
1789 struct net_device *dev = port->fcoe->netdev;
1790 struct ethtool_cmd ecmd = { ETHTOOL_GSET };
1791
1792 if ((dev->flags & IFF_UP) && netif_carrier_ok(dev) &&
1793 (!dev_ethtool_get_settings(dev, &ecmd))) {
1794 lp->link_supported_speeds &=
1795 ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
1796 if (ecmd.supported & (SUPPORTED_1000baseT_Half |
1797 SUPPORTED_1000baseT_Full))
1798 lp->link_supported_speeds |= FC_PORTSPEED_1GBIT;
1799 if (ecmd.supported & SUPPORTED_10000baseT_Full)
1800 lp->link_supported_speeds |=
1801 FC_PORTSPEED_10GBIT;
1802 if (ecmd.speed == SPEED_1000)
1803 lp->link_speed = FC_PORTSPEED_1GBIT;
1804 if (ecmd.speed == SPEED_10000)
1805 lp->link_speed = FC_PORTSPEED_10GBIT;
1806
1807 return 0;
1808 }
1809 return -1;
1810}
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823void fcoe_percpu_clean(struct fc_lport *lp)
1824{
1825 struct fcoe_percpu_s *pp;
1826 struct fcoe_rcv_info *fr;
1827 struct sk_buff_head *list;
1828 struct sk_buff *skb, *next;
1829 struct sk_buff *head;
1830 unsigned int cpu;
1831
1832 for_each_possible_cpu(cpu) {
1833 pp = &per_cpu(fcoe_percpu, cpu);
1834 spin_lock_bh(&pp->fcoe_rx_list.lock);
1835 list = &pp->fcoe_rx_list;
1836 head = list->next;
1837 for (skb = head; skb != (struct sk_buff *)list;
1838 skb = next) {
1839 next = skb->next;
1840 fr = fcoe_dev_from_skb(skb);
1841 if (fr->fr_dev == lp) {
1842 __skb_unlink(skb, list);
1843 kfree_skb(skb);
1844 }
1845 }
1846
1847 if (!pp->thread || !cpu_online(cpu)) {
1848 spin_unlock_bh(&pp->fcoe_rx_list.lock);
1849 continue;
1850 }
1851
1852 skb = dev_alloc_skb(0);
1853 if (!skb) {
1854 spin_unlock_bh(&pp->fcoe_rx_list.lock);
1855 continue;
1856 }
1857 skb->destructor = fcoe_percpu_flush_done;
1858
1859 __skb_queue_tail(&pp->fcoe_rx_list, skb);
1860 if (pp->fcoe_rx_list.qlen == 1)
1861 wake_up_process(pp->thread);
1862 spin_unlock_bh(&pp->fcoe_rx_list.lock);
1863
1864 wait_for_completion(&fcoe_flush_completion);
1865 }
1866}
1867
1868
1869
1870
1871
1872
1873
1874void fcoe_clean_pending_queue(struct fc_lport *lp)
1875{
1876 struct fcoe_port *port = lport_priv(lp);
1877 struct sk_buff *skb;
1878
1879 spin_lock_bh(&port->fcoe_pending_queue.lock);
1880 while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) {
1881 spin_unlock_bh(&port->fcoe_pending_queue.lock);
1882 kfree_skb(skb);
1883 spin_lock_bh(&port->fcoe_pending_queue.lock);
1884 }
1885 spin_unlock_bh(&port->fcoe_pending_queue.lock);
1886}
1887
1888
1889
1890
1891
1892
1893
1894int fcoe_reset(struct Scsi_Host *shost)
1895{
1896 struct fc_lport *lport = shost_priv(shost);
1897 fc_lport_reset(lport);
1898 return 0;
1899}
1900
1901
1902
1903
1904
1905
1906
1907
1908static struct fcoe_interface *
1909fcoe_hostlist_lookup_port(const struct net_device *dev)
1910{
1911 struct fcoe_interface *fcoe;
1912
1913 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1914 if (fcoe->netdev == dev)
1915 return fcoe;
1916 }
1917 return NULL;
1918}
1919
1920
1921
1922
1923
1924
1925
1926
1927static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
1928{
1929 struct fcoe_interface *fcoe;
1930
1931 fcoe = fcoe_hostlist_lookup_port(netdev);
1932 return (fcoe) ? fcoe->ctlr.lp : NULL;
1933}
1934
1935
1936
1937
1938
1939
1940
1941
1942static int fcoe_hostlist_add(const struct fc_lport *lport)
1943{
1944 struct fcoe_interface *fcoe;
1945 struct fcoe_port *port;
1946
1947 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
1948 if (!fcoe) {
1949 port = lport_priv(lport);
1950 fcoe = port->fcoe;
1951 list_add_tail(&fcoe->list, &fcoe_hostlist);
1952 }
1953 return 0;
1954}
1955
1956
1957
1958
1959
1960
1961static int __init fcoe_init(void)
1962{
1963 unsigned int cpu;
1964 int rc = 0;
1965 struct fcoe_percpu_s *p;
1966
1967 mutex_lock(&fcoe_config_mutex);
1968
1969 for_each_possible_cpu(cpu) {
1970 p = &per_cpu(fcoe_percpu, cpu);
1971 skb_queue_head_init(&p->fcoe_rx_list);
1972 }
1973
1974 for_each_online_cpu(cpu)
1975 fcoe_percpu_thread_create(cpu);
1976
1977
1978 rc = register_hotcpu_notifier(&fcoe_cpu_notifier);
1979 if (rc)
1980 goto out_free;
1981
1982
1983 fcoe_dev_setup();
1984
1985 rc = fcoe_if_init();
1986 if (rc)
1987 goto out_free;
1988
1989 mutex_unlock(&fcoe_config_mutex);
1990 return 0;
1991
1992out_free:
1993 for_each_online_cpu(cpu) {
1994 fcoe_percpu_thread_destroy(cpu);
1995 }
1996 mutex_unlock(&fcoe_config_mutex);
1997 return rc;
1998}
1999module_init(fcoe_init);
2000
2001
2002
2003
2004
2005
2006static void __exit fcoe_exit(void)
2007{
2008 unsigned int cpu;
2009 struct fcoe_interface *fcoe, *tmp;
2010 struct fcoe_port *port;
2011
2012 mutex_lock(&fcoe_config_mutex);
2013
2014 fcoe_dev_cleanup();
2015
2016
2017 rtnl_lock();
2018 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
2019 list_del(&fcoe->list);
2020 port = lport_priv(fcoe->ctlr.lp);
2021 fcoe_interface_cleanup(fcoe);
2022 schedule_work(&port->destroy_work);
2023 }
2024 rtnl_unlock();
2025
2026 unregister_hotcpu_notifier(&fcoe_cpu_notifier);
2027
2028 for_each_online_cpu(cpu)
2029 fcoe_percpu_thread_destroy(cpu);
2030
2031 mutex_unlock(&fcoe_config_mutex);
2032
2033
2034
2035 flush_scheduled_work();
2036
2037
2038
2039 fcoe_if_exit();
2040}
2041module_exit(fcoe_exit);
2042