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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved.
4 *
5 * Maintained at www.Open-FCoE.org
6 */
7
8#include <linux/module.h>
9#include <linux/spinlock.h>
10#include <linux/netdevice.h>
11#include <linux/etherdevice.h>
12#include <linux/ethtool.h>
13#include <linux/if_ether.h>
14#include <linux/if_vlan.h>
15#include <linux/crc32.h>
16#include <linux/slab.h>
17#include <linux/cpu.h>
18#include <linux/fs.h>
19#include <linux/sysfs.h>
20#include <linux/ctype.h>
21#include <linux/workqueue.h>
22#include <net/dcbnl.h>
23#include <net/dcbevent.h>
24#include <scsi/scsi_tcq.h>
25#include <scsi/scsicam.h>
26#include <scsi/scsi_transport.h>
27#include <scsi/scsi_transport_fc.h>
28#include <net/netdev_lock.h>
29#include <net/rtnetlink.h>
30
31#include <scsi/fc/fc_encaps.h>
32#include <scsi/fc/fc_fip.h>
33#include <scsi/fc/fc_fcoe.h>
34
35#include <scsi/libfc.h>
36#include <scsi/fc_frame.h>
37#include <scsi/libfcoe.h>
38
39#include "fcoe.h"
40
41MODULE_AUTHOR("Open-FCoE.org");
42MODULE_DESCRIPTION("FCoE");
43MODULE_LICENSE("GPL v2");
44
45/* Performance tuning parameters for fcoe */
46static unsigned int fcoe_ddp_min = 4096;
47module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR);
48MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \
49 "Direct Data Placement (DDP).");
50
51unsigned int fcoe_debug_logging;
52module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR);
53MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
54
55static unsigned int fcoe_e_d_tov = 2 * 1000;
56module_param_named(e_d_tov, fcoe_e_d_tov, int, S_IRUGO|S_IWUSR);
57MODULE_PARM_DESC(e_d_tov, "E_D_TOV in ms, default 2000");
58
59static unsigned int fcoe_r_a_tov = 2 * 2 * 1000;
60module_param_named(r_a_tov, fcoe_r_a_tov, int, S_IRUGO|S_IWUSR);
61MODULE_PARM_DESC(r_a_tov, "R_A_TOV in ms, default 4000");
62
63static DEFINE_MUTEX(fcoe_config_mutex);
64
65static struct workqueue_struct *fcoe_wq;
66
67/* fcoe host list */
68/* must only by accessed under the RTNL mutex */
69static LIST_HEAD(fcoe_hostlist);
70static DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
71
72/* Function Prototypes */
73static int fcoe_reset(struct Scsi_Host *);
74static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
75static int fcoe_rcv(struct sk_buff *, struct net_device *,
76 struct packet_type *, struct net_device *);
77static void fcoe_percpu_clean(struct fc_lport *);
78static int fcoe_link_ok(struct fc_lport *);
79
80static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
81static int fcoe_hostlist_add(const struct fc_lport *);
82static void fcoe_hostlist_del(const struct fc_lport *);
83
84static int fcoe_device_notification(struct notifier_block *, ulong, void *);
85static void fcoe_dev_setup(void);
86static void fcoe_dev_cleanup(void);
87static struct fcoe_interface
88*fcoe_hostlist_lookup_port(const struct net_device *);
89
90static int fcoe_fip_recv(struct sk_buff *, struct net_device *,
91 struct packet_type *, struct net_device *);
92static int fcoe_fip_vlan_recv(struct sk_buff *, struct net_device *,
93 struct packet_type *, struct net_device *);
94
95static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *);
96static void fcoe_update_src_mac(struct fc_lport *, u8 *);
97static u8 *fcoe_get_src_mac(struct fc_lport *);
98static void fcoe_destroy_work(struct work_struct *);
99
100static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *,
101 unsigned int);
102static int fcoe_ddp_done(struct fc_lport *, u16);
103static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *,
104 unsigned int);
105static int fcoe_dcb_app_notification(struct notifier_block *notifier,
106 ulong event, void *ptr);
107
108static bool fcoe_match(struct net_device *netdev);
109static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode);
110static int fcoe_destroy(struct net_device *netdev);
111static int fcoe_enable(struct net_device *netdev);
112static int fcoe_disable(struct net_device *netdev);
113
114/* fcoe_syfs control interface handlers */
115static int fcoe_ctlr_alloc(struct net_device *netdev);
116static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev);
117static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev);
118
119static struct fc_seq *fcoe_elsct_send(struct fc_lport *,
120 u32 did, struct fc_frame *,
121 unsigned int op,
122 void (*resp)(struct fc_seq *,
123 struct fc_frame *,
124 void *),
125 void *, u32 timeout);
126static void fcoe_recv_frame(struct sk_buff *skb);
127
128/* notification function for packets from net device */
129static struct notifier_block fcoe_notifier = {
130 .notifier_call = fcoe_device_notification,
131};
132
133/* notification function for DCB events */
134static struct notifier_block dcb_notifier = {
135 .notifier_call = fcoe_dcb_app_notification,
136};
137
138static struct scsi_transport_template *fcoe_nport_scsi_transport;
139static struct scsi_transport_template *fcoe_vport_scsi_transport;
140
141static int fcoe_vport_destroy(struct fc_vport *);
142static int fcoe_vport_create(struct fc_vport *, bool disabled);
143static int fcoe_vport_disable(struct fc_vport *, bool disable);
144static void fcoe_set_vport_symbolic_name(struct fc_vport *);
145static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *);
146static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *);
147static void fcoe_vport_remove(struct fc_lport *);
148
149static struct fcoe_sysfs_function_template fcoe_sysfs_templ = {
150 .set_fcoe_ctlr_mode = fcoe_ctlr_mode,
151 .set_fcoe_ctlr_enabled = fcoe_ctlr_enabled,
152 .get_fcoe_ctlr_link_fail = fcoe_ctlr_get_lesb,
153 .get_fcoe_ctlr_vlink_fail = fcoe_ctlr_get_lesb,
154 .get_fcoe_ctlr_miss_fka = fcoe_ctlr_get_lesb,
155 .get_fcoe_ctlr_symb_err = fcoe_ctlr_get_lesb,
156 .get_fcoe_ctlr_err_block = fcoe_ctlr_get_lesb,
157 .get_fcoe_ctlr_fcs_error = fcoe_ctlr_get_lesb,
158
159 .get_fcoe_fcf_selected = fcoe_fcf_get_selected,
160 .get_fcoe_fcf_vlan_id = fcoe_fcf_get_vlan_id,
161};
162
163static struct libfc_function_template fcoe_libfc_fcn_templ = {
164 .frame_send = fcoe_xmit,
165 .ddp_setup = fcoe_ddp_setup,
166 .ddp_done = fcoe_ddp_done,
167 .ddp_target = fcoe_ddp_target,
168 .elsct_send = fcoe_elsct_send,
169 .get_lesb = fcoe_get_lesb,
170 .lport_set_port_id = fcoe_set_port_id,
171};
172
173static struct fc_function_template fcoe_nport_fc_functions = {
174 .show_host_node_name = 1,
175 .show_host_port_name = 1,
176 .show_host_supported_classes = 1,
177 .show_host_supported_fc4s = 1,
178 .show_host_active_fc4s = 1,
179 .show_host_maxframe_size = 1,
180 .show_host_serial_number = 1,
181 .show_host_manufacturer = 1,
182 .show_host_model = 1,
183 .show_host_model_description = 1,
184 .show_host_hardware_version = 1,
185 .show_host_driver_version = 1,
186 .show_host_firmware_version = 1,
187 .show_host_optionrom_version = 1,
188
189 .show_host_port_id = 1,
190 .show_host_supported_speeds = 1,
191 .get_host_speed = fc_get_host_speed,
192 .show_host_speed = 1,
193 .show_host_port_type = 1,
194 .get_host_port_state = fc_get_host_port_state,
195 .show_host_port_state = 1,
196 .show_host_symbolic_name = 1,
197
198 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
199 .show_rport_maxframe_size = 1,
200 .show_rport_supported_classes = 1,
201
202 .show_host_fabric_name = 1,
203 .show_starget_node_name = 1,
204 .show_starget_port_name = 1,
205 .show_starget_port_id = 1,
206 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
207 .show_rport_dev_loss_tmo = 1,
208 .get_fc_host_stats = fc_get_host_stats,
209 .issue_fc_host_lip = fcoe_reset,
210
211 .terminate_rport_io = fc_rport_terminate_io,
212
213 .vport_create = fcoe_vport_create,
214 .vport_delete = fcoe_vport_destroy,
215 .vport_disable = fcoe_vport_disable,
216 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
217
218 .bsg_request = fc_lport_bsg_request,
219};
220
221static struct fc_function_template fcoe_vport_fc_functions = {
222 .show_host_node_name = 1,
223 .show_host_port_name = 1,
224 .show_host_supported_classes = 1,
225 .show_host_supported_fc4s = 1,
226 .show_host_active_fc4s = 1,
227 .show_host_maxframe_size = 1,
228 .show_host_serial_number = 1,
229 .show_host_manufacturer = 1,
230 .show_host_model = 1,
231 .show_host_model_description = 1,
232 .show_host_hardware_version = 1,
233 .show_host_driver_version = 1,
234 .show_host_firmware_version = 1,
235 .show_host_optionrom_version = 1,
236
237 .show_host_port_id = 1,
238 .show_host_supported_speeds = 1,
239 .get_host_speed = fc_get_host_speed,
240 .show_host_speed = 1,
241 .show_host_port_type = 1,
242 .get_host_port_state = fc_get_host_port_state,
243 .show_host_port_state = 1,
244 .show_host_symbolic_name = 1,
245
246 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
247 .show_rport_maxframe_size = 1,
248 .show_rport_supported_classes = 1,
249
250 .show_host_fabric_name = 1,
251 .show_starget_node_name = 1,
252 .show_starget_port_name = 1,
253 .show_starget_port_id = 1,
254 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
255 .show_rport_dev_loss_tmo = 1,
256 .get_fc_host_stats = fc_get_host_stats,
257 .issue_fc_host_lip = fcoe_reset,
258
259 .terminate_rport_io = fc_rport_terminate_io,
260
261 .bsg_request = fc_lport_bsg_request,
262};
263
264static const struct scsi_host_template fcoe_shost_template = {
265 .module = THIS_MODULE,
266 .name = "FCoE Driver",
267 .proc_name = FCOE_NAME,
268 .queuecommand = fc_queuecommand,
269 .eh_timed_out = fc_eh_timed_out,
270 .eh_abort_handler = fc_eh_abort,
271 .eh_device_reset_handler = fc_eh_device_reset,
272 .eh_host_reset_handler = fc_eh_host_reset,
273 .sdev_init = fc_sdev_init,
274 .change_queue_depth = scsi_change_queue_depth,
275 .this_id = -1,
276 .cmd_per_lun = 3,
277 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
278 .sg_tablesize = SG_ALL,
279 .max_sectors = 0xffff,
280 .track_queue_depth = 1,
281 .cmd_size = sizeof(struct libfc_cmd_priv),
282};
283
284/**
285 * fcoe_interface_setup() - Setup a FCoE interface
286 * @fcoe: The new FCoE interface
287 * @netdev: The net device that the fcoe interface is on
288 *
289 * Returns : 0 for success
290 * Locking: must be called with the RTNL mutex held
291 */
292static int fcoe_interface_setup(struct fcoe_interface *fcoe,
293 struct net_device *netdev)
294{
295 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
296 struct netdev_hw_addr *ha;
297 struct net_device *real_dev;
298 static const u8 flogi_maddr[ETH_ALEN] = FC_FCOE_FLOGI_MAC;
299 const struct net_device_ops *ops;
300
301 fcoe->netdev = netdev;
302
303 /* Let LLD initialize for FCoE */
304 ops = netdev->netdev_ops;
305 if (ops->ndo_fcoe_enable) {
306 if (ops->ndo_fcoe_enable(netdev))
307 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
308 " specific feature for LLD.\n");
309 }
310
311 /* Do not support for bonding device */
312 if (netif_is_bond_master(netdev)) {
313 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
314 return -EOPNOTSUPP;
315 }
316
317 /* look for SAN MAC address, if multiple SAN MACs exist, only
318 * use the first one for SPMA */
319 real_dev = is_vlan_dev(netdev) ? vlan_dev_real_dev(netdev) : netdev;
320 fcoe->realdev = real_dev;
321 rcu_read_lock();
322 for_each_dev_addr(real_dev, ha) {
323 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
324 (is_valid_ether_addr(ha->addr))) {
325 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
326 fip->spma = 1;
327 break;
328 }
329 }
330 rcu_read_unlock();
331
332 /* setup Source Mac Address */
333 if (!fip->spma)
334 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
335
336 /*
337 * Add FCoE MAC address as second unicast MAC address
338 * or enter promiscuous mode if not capable of listening
339 * for multiple unicast MACs.
340 */
341 dev_uc_add(netdev, flogi_maddr);
342 if (fip->spma)
343 dev_uc_add(netdev, fip->ctl_src_addr);
344 if (fip->mode == FIP_MODE_VN2VN) {
345 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS);
346 dev_mc_add(netdev, FIP_ALL_P2P_MACS);
347 } else
348 dev_mc_add(netdev, FIP_ALL_ENODE_MACS);
349
350 /*
351 * setup the receive function from ethernet driver
352 * on the ethertype for the given device
353 */
354 fcoe->fcoe_packet_type.func = fcoe_rcv;
355 fcoe->fcoe_packet_type.type = htons(ETH_P_FCOE);
356 fcoe->fcoe_packet_type.dev = netdev;
357 dev_add_pack(&fcoe->fcoe_packet_type);
358
359 fcoe->fip_packet_type.func = fcoe_fip_recv;
360 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
361 fcoe->fip_packet_type.dev = netdev;
362 dev_add_pack(&fcoe->fip_packet_type);
363
364 if (netdev != real_dev) {
365 fcoe->fip_vlan_packet_type.func = fcoe_fip_vlan_recv;
366 fcoe->fip_vlan_packet_type.type = htons(ETH_P_FIP);
367 fcoe->fip_vlan_packet_type.dev = real_dev;
368 dev_add_pack(&fcoe->fip_vlan_packet_type);
369 }
370 return 0;
371}
372
373/**
374 * fcoe_interface_create() - Create a FCoE interface on a net device
375 * @netdev: The net device to create the FCoE interface on
376 * @fip_mode: The mode to use for FIP
377 *
378 * Returns: pointer to a struct fcoe_interface or NULL on error
379 */
380static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
381 enum fip_mode fip_mode)
382{
383 struct fcoe_ctlr_device *ctlr_dev;
384 struct fcoe_ctlr *ctlr;
385 struct fcoe_interface *fcoe;
386 int size;
387 int err;
388
389 if (!try_module_get(THIS_MODULE)) {
390 FCOE_NETDEV_DBG(netdev,
391 "Could not get a reference to the module\n");
392 fcoe = ERR_PTR(-EBUSY);
393 goto out;
394 }
395
396 size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface);
397 ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ,
398 size);
399 if (!ctlr_dev) {
400 FCOE_DBG("Failed to add fcoe_ctlr_device\n");
401 fcoe = ERR_PTR(-ENOMEM);
402 goto out_putmod;
403 }
404
405 ctlr = fcoe_ctlr_device_priv(ctlr_dev);
406 ctlr->cdev = ctlr_dev;
407 fcoe = fcoe_ctlr_priv(ctlr);
408
409 dev_hold(netdev);
410
411 /*
412 * Initialize FIP.
413 */
414 fcoe_ctlr_init(ctlr, fip_mode);
415 ctlr->send = fcoe_fip_send;
416 ctlr->update_mac = fcoe_update_src_mac;
417 ctlr->get_src_addr = fcoe_get_src_mac;
418
419 err = fcoe_interface_setup(fcoe, netdev);
420 if (err) {
421 fcoe_ctlr_destroy(ctlr);
422 fcoe_ctlr_device_delete(ctlr_dev);
423 dev_put(netdev);
424 fcoe = ERR_PTR(err);
425 goto out_putmod;
426 }
427
428 goto out;
429
430out_putmod:
431 module_put(THIS_MODULE);
432out:
433 return fcoe;
434}
435
436/**
437 * fcoe_interface_remove() - remove FCoE interface from netdev
438 * @fcoe: The FCoE interface to be cleaned up
439 *
440 * Caller must be holding the RTNL mutex
441 */
442static void fcoe_interface_remove(struct fcoe_interface *fcoe)
443{
444 struct net_device *netdev = fcoe->netdev;
445 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
446 static const u8 flogi_maddr[ETH_ALEN] = FC_FCOE_FLOGI_MAC;
447 const struct net_device_ops *ops;
448
449 /*
450 * Don't listen for Ethernet packets anymore.
451 * synchronize_net() ensures that the packet handlers are not running
452 * on another CPU. dev_remove_pack() would do that, this calls the
453 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
454 */
455 __dev_remove_pack(&fcoe->fcoe_packet_type);
456 __dev_remove_pack(&fcoe->fip_packet_type);
457 if (netdev != fcoe->realdev)
458 __dev_remove_pack(&fcoe->fip_vlan_packet_type);
459 synchronize_net();
460
461 /* Delete secondary MAC addresses */
462 dev_uc_del(netdev, flogi_maddr);
463 if (fip->spma)
464 dev_uc_del(netdev, fip->ctl_src_addr);
465 if (fip->mode == FIP_MODE_VN2VN) {
466 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);
467 dev_mc_del(netdev, FIP_ALL_P2P_MACS);
468 } else
469 dev_mc_del(netdev, FIP_ALL_ENODE_MACS);
470
471 /* Tell the LLD we are done w/ FCoE */
472 ops = netdev->netdev_ops;
473 if (ops->ndo_fcoe_disable) {
474 if (ops->ndo_fcoe_disable(netdev))
475 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
476 " specific feature for LLD.\n");
477 }
478 fcoe->removed = 1;
479}
480
481
482/**
483 * fcoe_interface_cleanup() - Clean up a FCoE interface
484 * @fcoe: The FCoE interface to be cleaned up
485 */
486static void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
487{
488 struct net_device *netdev = fcoe->netdev;
489 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
490
491 /* Release the self-reference taken during fcoe_interface_create() */
492 /* tear-down the FCoE controller */
493 fcoe_ctlr_destroy(fip);
494 scsi_host_put(fip->lp->host);
495 dev_put(netdev);
496 module_put(THIS_MODULE);
497}
498
499/**
500 * fcoe_fip_recv() - Handler for received FIP frames
501 * @skb: The receive skb
502 * @netdev: The associated net device
503 * @ptype: The packet_type structure which was used to register this handler
504 * @orig_dev: The original net_device the skb was received on.
505 * (in case dev is a bond)
506 *
507 * Returns: 0 for success
508 */
509static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
510 struct packet_type *ptype,
511 struct net_device *orig_dev)
512{
513 struct fcoe_interface *fcoe;
514 struct fcoe_ctlr *ctlr;
515
516 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
517 ctlr = fcoe_to_ctlr(fcoe);
518 fcoe_ctlr_recv(ctlr, skb);
519 return 0;
520}
521
522/**
523 * fcoe_fip_vlan_recv() - Handler for received FIP VLAN discovery frames
524 * @skb: The receive skb
525 * @netdev: The associated net device
526 * @ptype: The packet_type structure which was used to register this handler
527 * @orig_dev: The original net_device the skb was received on.
528 * (in case dev is a bond)
529 *
530 * Returns: 0 for success
531 */
532static int fcoe_fip_vlan_recv(struct sk_buff *skb, struct net_device *netdev,
533 struct packet_type *ptype,
534 struct net_device *orig_dev)
535{
536 struct fcoe_interface *fcoe;
537 struct fcoe_ctlr *ctlr;
538
539 fcoe = container_of(ptype, struct fcoe_interface, fip_vlan_packet_type);
540 ctlr = fcoe_to_ctlr(fcoe);
541 fcoe_ctlr_recv(ctlr, skb);
542 return 0;
543}
544
545/**
546 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame
547 * @port: The FCoE port
548 * @skb: The FIP/FCoE packet to be sent
549 */
550static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb)
551{
552 if (port->fcoe_pending_queue.qlen)
553 fcoe_check_wait_queue(port->lport, skb);
554 else if (fcoe_start_io(skb))
555 fcoe_check_wait_queue(port->lport, skb);
556}
557
558/**
559 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
560 * @fip: The FCoE controller
561 * @skb: The FIP packet to be sent
562 */
563static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
564{
565 struct fcoe_interface *fcoe = fcoe_from_ctlr(fip);
566 struct fip_frame {
567 struct ethhdr eth;
568 struct fip_header fip;
569 } __packed *frame;
570
571 /*
572 * Use default VLAN for FIP VLAN discovery protocol
573 */
574 frame = (struct fip_frame *)skb->data;
575 if (ntohs(frame->eth.h_proto) == ETH_P_FIP &&
576 ntohs(frame->fip.fip_op) == FIP_OP_VLAN &&
577 fcoe->realdev != fcoe->netdev)
578 skb->dev = fcoe->realdev;
579 else
580 skb->dev = fcoe->netdev;
581 fcoe_port_send(lport_priv(fip->lp), skb);
582}
583
584/**
585 * fcoe_update_src_mac() - Update the Ethernet MAC filters
586 * @lport: The local port to update the source MAC on
587 * @addr: Unicast MAC address to add
588 *
589 * Remove any previously-set unicast MAC filter.
590 * Add secondary FCoE MAC address filter for our OUI.
591 */
592static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
593{
594 struct fcoe_port *port = lport_priv(lport);
595 struct fcoe_interface *fcoe = port->priv;
596
597 if (!is_zero_ether_addr(port->data_src_addr))
598 dev_uc_del(fcoe->netdev, port->data_src_addr);
599 if (!is_zero_ether_addr(addr))
600 dev_uc_add(fcoe->netdev, addr);
601 memcpy(port->data_src_addr, addr, ETH_ALEN);
602}
603
604/**
605 * fcoe_get_src_mac() - return the Ethernet source address for an lport
606 * @lport: libfc lport
607 */
608static u8 *fcoe_get_src_mac(struct fc_lport *lport)
609{
610 struct fcoe_port *port = lport_priv(lport);
611
612 return port->data_src_addr;
613}
614
615/**
616 * fcoe_lport_config() - Set up a local port
617 * @lport: The local port to be setup
618 *
619 * Returns: 0 for success
620 */
621static int fcoe_lport_config(struct fc_lport *lport)
622{
623 lport->link_up = 0;
624 lport->qfull = 0;
625 lport->max_retry_count = 3;
626 lport->max_rport_retry_count = 3;
627 lport->e_d_tov = fcoe_e_d_tov;
628 lport->r_a_tov = fcoe_r_a_tov;
629 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
630 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
631 lport->does_npiv = 1;
632
633 fc_lport_init_stats(lport);
634
635 /* lport fc_lport related configuration */
636 fc_lport_config(lport);
637
638 /* offload related configuration */
639 lport->crc_offload = 0;
640 lport->seq_offload = 0;
641 lport->lro_enabled = 0;
642 lport->lro_xid = 0;
643 lport->lso_max = 0;
644
645 return 0;
646}
647
648/*
649 * fcoe_netdev_features_change - Updates the lport's offload flags based
650 * on the LLD netdev's FCoE feature flags
651 */
652static void fcoe_netdev_features_change(struct fc_lport *lport,
653 struct net_device *netdev)
654{
655 mutex_lock(&lport->lp_mutex);
656
657 if (netdev->features & NETIF_F_SG)
658 lport->sg_supp = 1;
659 else
660 lport->sg_supp = 0;
661
662 if (netdev->features & NETIF_F_FCOE_CRC) {
663 lport->crc_offload = 1;
664 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
665 } else {
666 lport->crc_offload = 0;
667 }
668
669 if (netdev->features & NETIF_F_FSO) {
670 lport->seq_offload = 1;
671 lport->lso_max = min(netdev->gso_max_size, GSO_LEGACY_MAX_SIZE);
672 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
673 lport->lso_max);
674 } else {
675 lport->seq_offload = 0;
676 lport->lso_max = 0;
677 }
678
679 if (netdev->fcoe_ddp_xid) {
680 lport->lro_enabled = 1;
681 lport->lro_xid = netdev->fcoe_ddp_xid;
682 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
683 lport->lro_xid);
684 } else {
685 lport->lro_enabled = 0;
686 lport->lro_xid = 0;
687 }
688
689 mutex_unlock(&lport->lp_mutex);
690}
691
692/**
693 * fcoe_netdev_config() - Set up net devive for SW FCoE
694 * @lport: The local port that is associated with the net device
695 * @netdev: The associated net device
696 *
697 * Must be called after fcoe_lport_config() as it will use local port mutex
698 *
699 * Returns: 0 for success
700 */
701static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
702{
703 u32 mfs;
704 u64 wwnn, wwpn;
705 struct fcoe_interface *fcoe;
706 struct fcoe_ctlr *ctlr;
707 struct fcoe_port *port;
708
709 /* Setup lport private data to point to fcoe softc */
710 port = lport_priv(lport);
711 fcoe = port->priv;
712 ctlr = fcoe_to_ctlr(fcoe);
713
714 /* Figure out the VLAN ID, if any */
715 if (is_vlan_dev(netdev))
716 lport->vlan = vlan_dev_vlan_id(netdev);
717 else
718 lport->vlan = 0;
719
720 /*
721 * Determine max frame size based on underlying device and optional
722 * user-configured limit. If the MFS is too low, fcoe_link_ok()
723 * will return 0, so do this first.
724 */
725 mfs = netdev->mtu;
726 if (netdev->fcoe_mtu) {
727 mfs = FCOE_MTU;
728 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
729 }
730 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
731 if (fc_set_mfs(lport, mfs))
732 return -EINVAL;
733
734 /* offload features support */
735 fcoe_netdev_features_change(lport, netdev);
736
737 skb_queue_head_init(&port->fcoe_pending_queue);
738 port->fcoe_pending_queue_active = 0;
739 timer_setup(&port->timer, fcoe_queue_timer, 0);
740
741 netdev_lock_ops(netdev);
742 fcoe_link_speed_update(lport);
743 netdev_unlock_ops(netdev);
744
745 if (!lport->vport) {
746 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
747 wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0);
748 fc_set_wwnn(lport, wwnn);
749 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
750 wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr,
751 2, 0);
752 fc_set_wwpn(lport, wwpn);
753 }
754
755 return 0;
756}
757
758/**
759 * fcoe_shost_config() - Set up the SCSI host associated with a local port
760 * @lport: The local port
761 * @dev: The device associated with the SCSI host
762 *
763 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
764 *
765 * Returns: 0 for success
766 */
767static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)
768{
769 int rc = 0;
770
771 /* lport scsi host config */
772 lport->host->max_lun = FCOE_MAX_LUN;
773 lport->host->max_id = FCOE_MAX_FCP_TARGET;
774 lport->host->max_channel = 0;
775 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;
776
777 if (lport->vport)
778 lport->host->transportt = fcoe_vport_scsi_transport;
779 else
780 lport->host->transportt = fcoe_nport_scsi_transport;
781
782 /* add the new host to the SCSI-ml */
783 rc = scsi_add_host(lport->host, dev);
784 if (rc) {
785 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
786 "error on scsi_add_host\n");
787 return rc;
788 }
789
790 if (!lport->vport)
791 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
792
793 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
794 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
795 fcoe_netdev(lport)->name);
796
797 return 0;
798}
799
800
801/**
802 * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE
803 * @lport: The local port that is associated with the net device
804 * @netdev: The associated net device
805 *
806 * Must be called after fcoe_shost_config() as it will use local port mutex
807 *
808 */
809static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev)
810{
811 struct fcoe_interface *fcoe;
812 struct fcoe_port *port;
813 struct net_device *realdev;
814 int rc;
815
816 port = lport_priv(lport);
817 fcoe = port->priv;
818 realdev = fcoe->realdev;
819
820 /* No FDMI state m/c for NPIV ports */
821 if (lport->vport)
822 return;
823
824 if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) {
825 struct netdev_fcoe_hbainfo *fdmi;
826 fdmi = kzalloc_obj(*fdmi);
827 if (!fdmi)
828 return;
829
830 rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev,
831 fdmi);
832 if (rc) {
833 printk(KERN_INFO "fcoe: Failed to retrieve FDMI "
834 "information from netdev.\n");
835 return;
836 }
837
838 snprintf(fc_host_serial_number(lport->host),
839 FC_SERIAL_NUMBER_SIZE,
840 "%s",
841 fdmi->serial_number);
842 snprintf(fc_host_manufacturer(lport->host),
843 FC_SERIAL_NUMBER_SIZE,
844 "%s",
845 fdmi->manufacturer);
846 snprintf(fc_host_model(lport->host),
847 FC_SYMBOLIC_NAME_SIZE,
848 "%s",
849 fdmi->model);
850 snprintf(fc_host_model_description(lport->host),
851 FC_SYMBOLIC_NAME_SIZE,
852 "%s",
853 fdmi->model_description);
854 snprintf(fc_host_hardware_version(lport->host),
855 FC_VERSION_STRING_SIZE,
856 "%s",
857 fdmi->hardware_version);
858 snprintf(fc_host_driver_version(lport->host),
859 FC_VERSION_STRING_SIZE,
860 "%s",
861 fdmi->driver_version);
862 snprintf(fc_host_optionrom_version(lport->host),
863 FC_VERSION_STRING_SIZE,
864 "%s",
865 fdmi->optionrom_version);
866 snprintf(fc_host_firmware_version(lport->host),
867 FC_VERSION_STRING_SIZE,
868 "%s",
869 fdmi->firmware_version);
870
871 /* Enable FDMI lport states */
872 lport->fdmi_enabled = 1;
873 kfree(fdmi);
874 } else {
875 lport->fdmi_enabled = 0;
876 printk(KERN_INFO "fcoe: No FDMI support.\n");
877 }
878}
879
880/**
881 * fcoe_oem_match() - The match routine for the offloaded exchange manager
882 * @fp: The I/O frame
883 *
884 * This routine will be associated with an exchange manager (EM). When
885 * the libfc exchange handling code is looking for an EM to use it will
886 * call this routine and pass it the frame that it wishes to send. This
887 * routine will return True if the associated EM is to be used and False
888 * if the echange code should continue looking for an EM.
889 *
890 * The offload EM that this routine is associated with will handle any
891 * packets that are for SCSI read requests.
892 *
893 * This has been enhanced to work when FCoE stack is operating in target
894 * mode.
895 *
896 * Returns: True for read types I/O, otherwise returns false.
897 */
898static bool fcoe_oem_match(struct fc_frame *fp)
899{
900 struct fc_frame_header *fh = fc_frame_header_get(fp);
901 struct fcp_cmnd *fcp;
902
903 if (fc_fcp_is_read(fr_fsp(fp)) &&
904 (fr_fsp(fp)->data_len > fcoe_ddp_min))
905 return true;
906 else if ((fr_fsp(fp) == NULL) &&
907 (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) &&
908 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) {
909 fcp = fc_frame_payload_get(fp, sizeof(*fcp));
910 if ((fcp->fc_flags & FCP_CFL_WRDATA) &&
911 (ntohl(fcp->fc_dl) > fcoe_ddp_min))
912 return true;
913 }
914 return false;
915}
916
917/**
918 * fcoe_em_config() - Allocate and configure an exchange manager
919 * @lport: The local port that the new EM will be associated with
920 *
921 * Returns: 0 on success
922 */
923static inline int fcoe_em_config(struct fc_lport *lport)
924{
925 struct fcoe_port *port = lport_priv(lport);
926 struct fcoe_interface *fcoe = port->priv;
927 struct fcoe_interface *oldfcoe = NULL;
928 struct net_device *old_real_dev, *cur_real_dev;
929 u16 min_xid = FCOE_MIN_XID;
930 u16 max_xid = FCOE_MAX_XID;
931
932 /*
933 * Check if need to allocate an em instance for
934 * offload exchange ids to be shared across all VN_PORTs/lport.
935 */
936 if (!lport->lro_enabled || !lport->lro_xid ||
937 (lport->lro_xid >= max_xid)) {
938 lport->lro_xid = 0;
939 goto skip_oem;
940 }
941
942 /*
943 * Reuse existing offload em instance in case
944 * it is already allocated on real eth device
945 */
946 if (is_vlan_dev(fcoe->netdev))
947 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
948 else
949 cur_real_dev = fcoe->netdev;
950
951 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
952 if (is_vlan_dev(oldfcoe->netdev))
953 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
954 else
955 old_real_dev = oldfcoe->netdev;
956
957 if (cur_real_dev == old_real_dev) {
958 fcoe->oem = oldfcoe->oem;
959 break;
960 }
961 }
962
963 if (fcoe->oem) {
964 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
965 printk(KERN_ERR "fcoe_em_config: failed to add "
966 "offload em:%p on interface:%s\n",
967 fcoe->oem, fcoe->netdev->name);
968 return -ENOMEM;
969 }
970 } else {
971 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
972 FCOE_MIN_XID, lport->lro_xid,
973 fcoe_oem_match);
974 if (!fcoe->oem) {
975 printk(KERN_ERR "fcoe_em_config: failed to allocate "
976 "em for offload exches on interface:%s\n",
977 fcoe->netdev->name);
978 return -ENOMEM;
979 }
980 }
981
982 /*
983 * Exclude offload EM xid range from next EM xid range.
984 */
985 min_xid += lport->lro_xid + 1;
986
987skip_oem:
988 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
989 printk(KERN_ERR "fcoe_em_config: failed to "
990 "allocate em on interface %s\n", fcoe->netdev->name);
991 return -ENOMEM;
992 }
993
994 return 0;
995}
996
997/**
998 * fcoe_if_destroy() - Tear down a SW FCoE instance
999 * @lport: The local port to be destroyed
1000 *
1001 * Locking: Must be called with the RTNL mutex held.
1002 *
1003 */
1004static void fcoe_if_destroy(struct fc_lport *lport)
1005{
1006 struct fcoe_port *port = lport_priv(lport);
1007 struct fcoe_interface *fcoe = port->priv;
1008 struct net_device *netdev = fcoe->netdev;
1009
1010 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
1011
1012 /* Logout of the fabric */
1013 fc_fabric_logoff(lport);
1014
1015 /* Cleanup the fc_lport */
1016 fc_lport_destroy(lport);
1017
1018 /* Stop the transmit retry timer */
1019 timer_delete_sync(&port->timer);
1020
1021 /* Free existing transmit skbs */
1022 fcoe_clean_pending_queue(lport);
1023
1024 if (!is_zero_ether_addr(port->data_src_addr))
1025 dev_uc_del(netdev, port->data_src_addr);
1026 if (lport->vport)
1027 synchronize_net();
1028 else
1029 fcoe_interface_remove(fcoe);
1030
1031 /* Free queued packets for the per-CPU receive threads */
1032 fcoe_percpu_clean(lport);
1033
1034 /* Detach from the scsi-ml */
1035 fc_remove_host(lport->host);
1036 scsi_remove_host(lport->host);
1037
1038 /* Destroy lport scsi_priv */
1039 fc_fcp_destroy(lport);
1040
1041 /* There are no more rports or I/O, free the EM */
1042 fc_exch_mgr_free(lport);
1043
1044 /* Free memory used by statistical counters */
1045 fc_lport_free_stats(lport);
1046
1047 /*
1048 * Release the Scsi_Host for vport but hold on to
1049 * master lport until it fcoe interface fully cleaned-up.
1050 */
1051 if (lport->vport)
1052 scsi_host_put(lport->host);
1053}
1054
1055/**
1056 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
1057 * @lport: The local port to setup DDP for
1058 * @xid: The exchange ID for this DDP transfer
1059 * @sgl: The scatterlist describing this transfer
1060 * @sgc: The number of sg items
1061 *
1062 * Returns: 0 if the DDP context was not configured
1063 */
1064static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
1065 struct scatterlist *sgl, unsigned int sgc)
1066{
1067 struct net_device *netdev = fcoe_netdev(lport);
1068
1069 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
1070 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
1071 xid, sgl,
1072 sgc);
1073
1074 return 0;
1075}
1076
1077/**
1078 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device
1079 * @lport: The local port to setup DDP for
1080 * @xid: The exchange ID for this DDP transfer
1081 * @sgl: The scatterlist describing this transfer
1082 * @sgc: The number of sg items
1083 *
1084 * Returns: 0 if the DDP context was not configured
1085 */
1086static int fcoe_ddp_target(struct fc_lport *lport, u16 xid,
1087 struct scatterlist *sgl, unsigned int sgc)
1088{
1089 struct net_device *netdev = fcoe_netdev(lport);
1090
1091 if (netdev->netdev_ops->ndo_fcoe_ddp_target)
1092 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid,
1093 sgl, sgc);
1094
1095 return 0;
1096}
1097
1098
1099/**
1100 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
1101 * @lport: The local port to complete DDP on
1102 * @xid: The exchange ID for this DDP transfer
1103 *
1104 * Returns: the length of data that have been completed by DDP
1105 */
1106static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
1107{
1108 struct net_device *netdev = fcoe_netdev(lport);
1109
1110 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
1111 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
1112 return 0;
1113}
1114
1115/**
1116 * fcoe_if_create() - Create a FCoE instance on an interface
1117 * @fcoe: The FCoE interface to create a local port on
1118 * @parent: The device pointer to be the parent in sysfs for the SCSI host
1119 * @npiv: Indicates if the port is a vport or not
1120 *
1121 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
1122 *
1123 * Returns: The allocated fc_lport or an error pointer
1124 */
1125static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
1126 struct device *parent, int npiv)
1127{
1128 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
1129 struct net_device *netdev = fcoe->netdev;
1130 struct fc_lport *lport, *n_port;
1131 struct fcoe_port *port;
1132 struct Scsi_Host *shost;
1133 int rc;
1134 /*
1135 * parent is only a vport if npiv is 1,
1136 * but we'll only use vport in that case so go ahead and set it
1137 */
1138 struct fc_vport *vport = dev_to_vport(parent);
1139
1140 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
1141
1142 if (!npiv)
1143 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port));
1144 else
1145 lport = libfc_vport_create(vport, sizeof(*port));
1146
1147 if (!lport) {
1148 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
1149 rc = -ENOMEM;
1150 goto out;
1151 }
1152 port = lport_priv(lport);
1153 port->lport = lport;
1154 port->priv = fcoe;
1155 port->get_netdev = fcoe_netdev;
1156 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH;
1157 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH;
1158 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
1159
1160 /*
1161 * Need to add the lport to the hostlist
1162 * so we catch NETDEV_CHANGE events.
1163 */
1164 fcoe_hostlist_add(lport);
1165
1166 /* configure a fc_lport including the exchange manager */
1167 rc = fcoe_lport_config(lport);
1168 if (rc) {
1169 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
1170 "interface\n");
1171 goto out_host_put;
1172 }
1173
1174 if (npiv) {
1175 FCOE_NETDEV_DBG(netdev, "Setting vport names, "
1176 "%16.16llx %16.16llx\n",
1177 vport->node_name, vport->port_name);
1178 fc_set_wwnn(lport, vport->node_name);
1179 fc_set_wwpn(lport, vport->port_name);
1180 }
1181
1182 /* configure lport network properties */
1183 rc = fcoe_netdev_config(lport, netdev);
1184 if (rc) {
1185 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
1186 "interface\n");
1187 goto out_lp_destroy;
1188 }
1189
1190 /* configure lport scsi host properties */
1191 rc = fcoe_shost_config(lport, parent);
1192 if (rc) {
1193 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
1194 "interface\n");
1195 goto out_lp_destroy;
1196 }
1197
1198 /* Initialize the library */
1199 rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1);
1200 if (rc) {
1201 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
1202 "interface\n");
1203 goto out_lp_destroy;
1204 }
1205
1206 /* Initialized FDMI information */
1207 fcoe_fdmi_info(lport, netdev);
1208
1209 /*
1210 * fcoe_em_alloc() and fcoe_hostlist_add() both
1211 * need to be atomic with respect to other changes to the
1212 * hostlist since fcoe_em_alloc() looks for an existing EM
1213 * instance on host list updated by fcoe_hostlist_add().
1214 *
1215 * This is currently handled through the fcoe_config_mutex
1216 * begin held.
1217 */
1218 if (!npiv)
1219 /* lport exch manager allocation */
1220 rc = fcoe_em_config(lport);
1221 else {
1222 shost = vport_to_shost(vport);
1223 n_port = shost_priv(shost);
1224 rc = fc_exch_mgr_list_clone(n_port, lport);
1225 }
1226
1227 if (rc) {
1228 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n");
1229 goto out_lp_destroy;
1230 }
1231
1232 return lport;
1233
1234out_lp_destroy:
1235 fc_exch_mgr_free(lport);
1236out_host_put:
1237 fcoe_hostlist_del(lport);
1238 scsi_host_put(lport->host);
1239out:
1240 return ERR_PTR(rc);
1241}
1242
1243/**
1244 * fcoe_if_init() - Initialization routine for fcoe.ko
1245 *
1246 * Attaches the SW FCoE transport to the FC transport
1247 *
1248 * Returns: 0 on success
1249 */
1250static int __init fcoe_if_init(void)
1251{
1252 /* attach to scsi transport */
1253 fcoe_nport_scsi_transport =
1254 fc_attach_transport(&fcoe_nport_fc_functions);
1255 if (!fcoe_nport_scsi_transport)
1256 goto err;
1257
1258 fcoe_vport_scsi_transport =
1259 fc_attach_transport(&fcoe_vport_fc_functions);
1260 if (!fcoe_vport_scsi_transport)
1261 goto err_vport;
1262
1263 return 0;
1264
1265err_vport:
1266 fc_release_transport(fcoe_nport_scsi_transport);
1267err:
1268 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
1269 return -ENODEV;
1270}
1271
1272/**
1273 * fcoe_if_exit() - Tear down fcoe.ko
1274 *
1275 * Detaches the SW FCoE transport from the FC transport
1276 *
1277 * Returns: 0 on success
1278 */
1279static int __exit fcoe_if_exit(void)
1280{
1281 fc_release_transport(fcoe_nport_scsi_transport);
1282 fc_release_transport(fcoe_vport_scsi_transport);
1283 fcoe_nport_scsi_transport = NULL;
1284 fcoe_vport_scsi_transport = NULL;
1285 return 0;
1286}
1287
1288static void fcoe_thread_cleanup_local(unsigned int cpu)
1289{
1290 struct page *crc_eof;
1291 struct fcoe_percpu_s *p;
1292
1293 p = per_cpu_ptr(&fcoe_percpu, cpu);
1294 spin_lock_bh(&p->fcoe_rx_list.lock);
1295 crc_eof = p->crc_eof_page;
1296 p->crc_eof_page = NULL;
1297 p->crc_eof_offset = 0;
1298 spin_unlock_bh(&p->fcoe_rx_list.lock);
1299
1300 if (crc_eof)
1301 put_page(crc_eof);
1302 flush_work(&p->work);
1303}
1304
1305/**
1306 * fcoe_rcv() - Receive packets from a net device
1307 * @skb: The received packet
1308 * @netdev: The net device that the packet was received on
1309 * @ptype: The packet type context
1310 * @olddev: The last device net device
1311 *
1312 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1313 * FC frame and passes the frame to libfc.
1314 *
1315 * Returns: 0 for success
1316 */
1317static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
1318 struct packet_type *ptype, struct net_device *olddev)
1319{
1320 struct fc_lport *lport;
1321 struct fcoe_rcv_info *fr;
1322 struct fcoe_ctlr *ctlr;
1323 struct fcoe_interface *fcoe;
1324 struct fc_frame_header *fh;
1325 struct fcoe_percpu_s *fps;
1326 struct ethhdr *eh;
1327 unsigned int cpu;
1328
1329 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
1330 ctlr = fcoe_to_ctlr(fcoe);
1331 lport = ctlr->lp;
1332 if (unlikely(!lport)) {
1333 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n");
1334 goto err2;
1335 }
1336 if (!lport->link_up)
1337 goto err2;
1338
1339 FCOE_NETDEV_DBG(netdev,
1340 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
1341 skb->len, skb->data_len, skb->head, skb->data,
1342 skb_tail_pointer(skb), skb_end_pointer(skb),
1343 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
1344
1345
1346 skb = skb_share_check(skb, GFP_ATOMIC);
1347
1348 if (skb == NULL)
1349 return NET_RX_DROP;
1350
1351 eh = eth_hdr(skb);
1352
1353 if (is_fip_mode(ctlr) &&
1354 !ether_addr_equal(eh->h_source, ctlr->dest_addr)) {
1355 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
1356 eh->h_source);
1357 goto err;
1358 }
1359
1360 /*
1361 * Check for minimum frame length, and make sure required FCoE
1362 * and FC headers are pulled into the linear data area.
1363 */
1364 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1365 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
1366 goto err;
1367
1368 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1369 fh = (struct fc_frame_header *) skb_transport_header(skb);
1370
1371 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) {
1372 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n",
1373 eh->h_dest);
1374 goto err;
1375 }
1376
1377 fr = fcoe_dev_from_skb(skb);
1378 fr->fr_dev = lport;
1379
1380 /*
1381 * In case the incoming frame's exchange is originated from
1382 * the initiator, then received frame's exchange id is ANDed
1383 * with fc_cpu_mask bits to get the same cpu on which exchange
1384 * was originated, otherwise select cpu using rx exchange id
1385 * or fcoe_select_cpu().
1386 */
1387 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1388 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
1389 else {
1390 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)
1391 cpu = skb->alloc_cpu;
1392 else
1393 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask;
1394 }
1395
1396 if (cpu >= nr_cpu_ids)
1397 goto err;
1398
1399 fps = &per_cpu(fcoe_percpu, cpu);
1400 spin_lock(&fps->fcoe_rx_list.lock);
1401 /*
1402 * We now have a valid CPU that we're targeting for
1403 * this skb. We also have this receive thread locked,
1404 * so we're free to queue skbs into it's queue.
1405 */
1406
1407 /*
1408 * Note: We used to have a set of conditions under which we would
1409 * call fcoe_recv_frame directly, rather than queuing to the rx list
1410 * as it could save a few cycles, but doing so is prohibited, as
1411 * fcoe_recv_frame has several paths that may sleep, which is forbidden
1412 * in softirq context.
1413 */
1414 __skb_queue_tail(&fps->fcoe_rx_list, skb);
1415 schedule_work_on(cpu, &fps->work);
1416 spin_unlock(&fps->fcoe_rx_list.lock);
1417
1418 return NET_RX_SUCCESS;
1419err:
1420 this_cpu_inc(lport->stats->ErrorFrames);
1421err2:
1422 kfree_skb(skb);
1423 return NET_RX_DROP;
1424}
1425
1426/**
1427 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1428 * @skb: The packet to be transmitted
1429 * @tlen: The total length of the trailer
1430 *
1431 * Returns: 0 for success
1432 */
1433static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)
1434{
1435 struct fcoe_percpu_s *fps;
1436 int rc;
1437
1438 local_lock(&fcoe_percpu.lock);
1439 fps = this_cpu_ptr(&fcoe_percpu);
1440 rc = fcoe_get_paged_crc_eof(skb, tlen, fps);
1441 local_unlock(&fcoe_percpu.lock);
1442
1443 return rc;
1444}
1445
1446/**
1447 * fcoe_xmit() - Transmit a FCoE frame
1448 * @lport: The local port that the frame is to be transmitted for
1449 * @fp: The frame to be transmitted
1450 *
1451 * Return: 0 for success
1452 */
1453static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
1454{
1455 int wlen;
1456 u32 crc;
1457 struct ethhdr *eh;
1458 struct fcoe_crc_eof *cp;
1459 struct sk_buff *skb;
1460 struct fc_frame_header *fh;
1461 unsigned int hlen; /* header length implies the version */
1462 unsigned int tlen; /* trailer length */
1463 unsigned int elen; /* eth header, may include vlan */
1464 struct fcoe_port *port = lport_priv(lport);
1465 struct fcoe_interface *fcoe = port->priv;
1466 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
1467 u8 sof, eof;
1468 struct fcoe_hdr *hp;
1469
1470 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1471
1472 fh = fc_frame_header_get(fp);
1473 skb = fp_skb(fp);
1474
1475 if (!lport->link_up) {
1476 kfree_skb(skb);
1477 return 0;
1478 }
1479
1480 if (unlikely(fh->fh_type == FC_TYPE_ELS) &&
1481 fcoe_ctlr_els_send(ctlr, lport, skb))
1482 return 0;
1483
1484 sof = fr_sof(fp);
1485 eof = fr_eof(fp);
1486
1487 elen = sizeof(struct ethhdr);
1488 hlen = sizeof(struct fcoe_hdr);
1489 tlen = sizeof(struct fcoe_crc_eof);
1490 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1491
1492 /* crc offload */
1493 if (likely(lport->crc_offload)) {
1494 skb->ip_summed = CHECKSUM_PARTIAL;
1495 skb->csum_start = skb_headroom(skb);
1496 skb->csum_offset = skb->len;
1497 crc = 0;
1498 } else {
1499 skb->ip_summed = CHECKSUM_NONE;
1500 crc = fcoe_fc_crc(fp);
1501 }
1502
1503 /* copy port crc and eof to the skb buff */
1504 if (skb_is_nonlinear(skb)) {
1505 skb_frag_t *frag;
1506 if (fcoe_alloc_paged_crc_eof(skb, tlen)) {
1507 kfree_skb(skb);
1508 return -ENOMEM;
1509 }
1510 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1511 cp = kmap_atomic(skb_frag_page(frag)) + skb_frag_off(frag);
1512 } else {
1513 cp = skb_put(skb, tlen);
1514 }
1515
1516 memset(cp, 0, sizeof(*cp));
1517 cp->fcoe_eof = eof;
1518 cp->fcoe_crc32 = cpu_to_le32(~crc);
1519
1520 if (skb_is_nonlinear(skb)) {
1521 kunmap_atomic(cp);
1522 cp = NULL;
1523 }
1524
1525 /* adjust skb network/transport offsets to match mac/fcoe/port */
1526 skb_push(skb, elen + hlen);
1527 skb_reset_mac_header(skb);
1528 skb_reset_network_header(skb);
1529 skb->mac_len = elen;
1530 skb->protocol = htons(ETH_P_FCOE);
1531 skb->priority = fcoe->priority;
1532
1533 if (is_vlan_dev(fcoe->netdev) &&
1534 fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) {
1535 /* must set skb->dev before calling vlan_put_tag */
1536 skb->dev = fcoe->realdev;
1537 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1538 vlan_dev_vlan_id(fcoe->netdev));
1539 } else
1540 skb->dev = fcoe->netdev;
1541
1542 /* fill up mac and fcoe headers */
1543 eh = eth_hdr(skb);
1544 eh->h_proto = htons(ETH_P_FCOE);
1545 memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN);
1546 if (ctlr->map_dest)
1547 memcpy(eh->h_dest + 3, fh->fh_d_id, 3);
1548
1549 if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN))
1550 memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN);
1551 else
1552 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
1553
1554 hp = (struct fcoe_hdr *)(eh + 1);
1555 memset(hp, 0, sizeof(*hp));
1556 if (FC_FCOE_VER)
1557 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1558 hp->fcoe_sof = sof;
1559
1560 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1561 if (lport->seq_offload && fr_max_payload(fp)) {
1562 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1563 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1564 } else {
1565 skb_shinfo(skb)->gso_type = 0;
1566 skb_shinfo(skb)->gso_size = 0;
1567 }
1568 /* update tx stats: regardless if LLD fails */
1569 this_cpu_inc(lport->stats->TxFrames);
1570 this_cpu_add(lport->stats->TxWords, wlen);
1571
1572 /* send down to lld */
1573 fr_dev(fp) = lport;
1574 fcoe_port_send(port, skb);
1575 return 0;
1576}
1577
1578/**
1579 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
1580 * @lport: The local port the frame was received on
1581 * @fp: The received frame
1582 *
1583 * Return: 0 on passing filtering checks
1584 */
1585static inline int fcoe_filter_frames(struct fc_lport *lport,
1586 struct fc_frame *fp)
1587{
1588 struct fcoe_ctlr *ctlr;
1589 struct fcoe_interface *fcoe;
1590 struct fc_frame_header *fh;
1591 struct sk_buff *skb = (struct sk_buff *)fp;
1592
1593 /*
1594 * We only check CRC if no offload is available and if it is
1595 * it's solicited data, in which case, the FCP layer would
1596 * check it during the copy.
1597 */
1598 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
1599 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1600 else
1601 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1602
1603 fh = fc_frame_header_get(fp);
1604 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP)
1605 return 0;
1606
1607 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;
1608 ctlr = fcoe_to_ctlr(fcoe);
1609 if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
1610 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
1611 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1612 return -EINVAL;
1613 }
1614
1615 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) ||
1616 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) {
1617 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1618 return 0;
1619 }
1620
1621 if (this_cpu_inc_return(lport->stats->InvalidCRCCount) < 5)
1622 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
1623 return -EINVAL;
1624}
1625
1626/**
1627 * fcoe_recv_frame() - process a single received frame
1628 * @skb: frame to process
1629 */
1630static void fcoe_recv_frame(struct sk_buff *skb)
1631{
1632 u32 fr_len;
1633 struct fc_lport *lport;
1634 struct fcoe_rcv_info *fr;
1635 struct fcoe_crc_eof crc_eof;
1636 struct fc_frame *fp;
1637 struct fcoe_hdr *hp;
1638
1639 fr = fcoe_dev_from_skb(skb);
1640 lport = fr->fr_dev;
1641 if (unlikely(!lport)) {
1642 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n");
1643 kfree_skb(skb);
1644 return;
1645 }
1646
1647 FCOE_NETDEV_DBG(skb->dev,
1648 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
1649 skb->len, skb->data_len,
1650 skb->head, skb->data, skb_tail_pointer(skb),
1651 skb_end_pointer(skb), skb->csum,
1652 skb->dev ? skb->dev->name : "<NULL>");
1653
1654 skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */
1655
1656 /*
1657 * Frame length checks and setting up the header pointers
1658 * was done in fcoe_rcv already.
1659 */
1660 hp = (struct fcoe_hdr *) skb_network_header(skb);
1661
1662 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1663 struct fc_stats *stats;
1664
1665 stats = per_cpu_ptr(lport->stats, raw_smp_processor_id());
1666 if (READ_ONCE(stats->ErrorFrames) < 5)
1667 printk(KERN_WARNING "fcoe: FCoE version "
1668 "mismatch: The frame has "
1669 "version %x, but the "
1670 "initiator supports version "
1671 "%x\n", FC_FCOE_DECAPS_VER(hp),
1672 FC_FCOE_VER);
1673 goto drop;
1674 }
1675
1676 skb_pull(skb, sizeof(struct fcoe_hdr));
1677 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1678
1679 this_cpu_inc(lport->stats->RxFrames);
1680 this_cpu_add(lport->stats->RxWords, fr_len / FCOE_WORD_TO_BYTE);
1681
1682 fp = (struct fc_frame *)skb;
1683 fc_frame_init(fp);
1684 fr_dev(fp) = lport;
1685 fr_sof(fp) = hp->fcoe_sof;
1686
1687 /* Copy out the CRC and EOF trailer for access */
1688 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof)))
1689 goto drop;
1690 fr_eof(fp) = crc_eof.fcoe_eof;
1691 fr_crc(fp) = crc_eof.fcoe_crc32;
1692 if (pskb_trim(skb, fr_len))
1693 goto drop;
1694
1695 if (!fcoe_filter_frames(lport, fp)) {
1696 fc_exch_recv(lport, fp);
1697 return;
1698 }
1699drop:
1700 this_cpu_inc(lport->stats->ErrorFrames);
1701 kfree_skb(skb);
1702}
1703
1704/**
1705 * fcoe_receive_work() - The per-CPU worker
1706 * @work: The work struct
1707 *
1708 */
1709static void fcoe_receive_work(struct work_struct *work)
1710{
1711 struct fcoe_percpu_s *p;
1712 struct sk_buff *skb;
1713 struct sk_buff_head tmp;
1714
1715 p = container_of(work, struct fcoe_percpu_s, work);
1716 skb_queue_head_init(&tmp);
1717
1718 spin_lock_bh(&p->fcoe_rx_list.lock);
1719 skb_queue_splice_init(&p->fcoe_rx_list, &tmp);
1720 spin_unlock_bh(&p->fcoe_rx_list.lock);
1721
1722 if (!skb_queue_len(&tmp))
1723 return;
1724
1725 while ((skb = __skb_dequeue(&tmp)))
1726 fcoe_recv_frame(skb);
1727}
1728
1729/**
1730 * fcoe_dev_setup() - Setup the link change notification interface
1731 */
1732static void fcoe_dev_setup(void)
1733{
1734 register_dcbevent_notifier(&dcb_notifier);
1735 register_netdevice_notifier(&fcoe_notifier);
1736}
1737
1738/**
1739 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1740 */
1741static void fcoe_dev_cleanup(void)
1742{
1743 unregister_dcbevent_notifier(&dcb_notifier);
1744 unregister_netdevice_notifier(&fcoe_notifier);
1745}
1746
1747static struct fcoe_interface *
1748fcoe_hostlist_lookup_realdev_port(struct net_device *netdev)
1749{
1750 struct fcoe_interface *fcoe;
1751 struct net_device *real_dev;
1752
1753 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1754 if (is_vlan_dev(fcoe->netdev))
1755 real_dev = vlan_dev_real_dev(fcoe->netdev);
1756 else
1757 real_dev = fcoe->netdev;
1758
1759 if (netdev == real_dev)
1760 return fcoe;
1761 }
1762 return NULL;
1763}
1764
1765static int fcoe_dcb_app_notification(struct notifier_block *notifier,
1766 ulong event, void *ptr)
1767{
1768 struct dcb_app_type *entry = ptr;
1769 struct fcoe_ctlr *ctlr;
1770 struct fcoe_interface *fcoe;
1771 struct net_device *netdev;
1772 int prio;
1773
1774 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE)
1775 return NOTIFY_OK;
1776
1777 netdev = dev_get_by_index(&init_net, entry->ifindex);
1778 if (!netdev)
1779 return NOTIFY_OK;
1780
1781 fcoe = fcoe_hostlist_lookup_realdev_port(netdev);
1782 dev_put(netdev);
1783 if (!fcoe)
1784 return NOTIFY_OK;
1785
1786 ctlr = fcoe_to_ctlr(fcoe);
1787
1788 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE)
1789 prio = ffs(entry->app.priority) - 1;
1790 else
1791 prio = entry->app.priority;
1792
1793 if (prio < 0)
1794 return NOTIFY_OK;
1795
1796 if (entry->app.protocol == ETH_P_FIP ||
1797 entry->app.protocol == ETH_P_FCOE)
1798 ctlr->priority = prio;
1799
1800 if (entry->app.protocol == ETH_P_FCOE)
1801 fcoe->priority = prio;
1802
1803 return NOTIFY_OK;
1804}
1805
1806/**
1807 * fcoe_device_notification() - Handler for net device events
1808 * @notifier: The context of the notification
1809 * @event: The type of event
1810 * @ptr: The net device that the event was on
1811 *
1812 * This function is called by the Ethernet driver in case of link change event.
1813 *
1814 * Returns: 0 for success
1815 */
1816static int fcoe_device_notification(struct notifier_block *notifier,
1817 ulong event, void *ptr)
1818{
1819 struct fcoe_ctlr_device *cdev;
1820 struct fc_lport *lport = NULL;
1821 struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
1822 struct fcoe_ctlr *ctlr;
1823 struct fcoe_interface *fcoe;
1824 u32 link_possible = 1;
1825 u32 mfs;
1826 int rc = NOTIFY_OK;
1827
1828 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1829 if (fcoe->netdev == netdev) {
1830 ctlr = fcoe_to_ctlr(fcoe);
1831 lport = ctlr->lp;
1832 break;
1833 }
1834 }
1835 if (!lport) {
1836 rc = NOTIFY_DONE;
1837 goto out;
1838 }
1839
1840 switch (event) {
1841 case NETDEV_DOWN:
1842 case NETDEV_GOING_DOWN:
1843 link_possible = 0;
1844 break;
1845 case NETDEV_UP:
1846 case NETDEV_CHANGE:
1847 fcoe_link_speed_update(lport);
1848 break;
1849 case NETDEV_CHANGEMTU:
1850 if (netdev->fcoe_mtu)
1851 break;
1852 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
1853 sizeof(struct fcoe_crc_eof));
1854 if (mfs >= FC_MIN_MAX_FRAME)
1855 fc_set_mfs(lport, mfs);
1856 break;
1857 case NETDEV_REGISTER:
1858 break;
1859 case NETDEV_UNREGISTER:
1860 list_del(&fcoe->list);
1861 fcoe_vport_remove(lport);
1862 mutex_lock(&fcoe_config_mutex);
1863 fcoe_if_destroy(lport);
1864 if (!fcoe->removed)
1865 fcoe_interface_remove(fcoe);
1866 fcoe_interface_cleanup(fcoe);
1867 mutex_unlock(&fcoe_config_mutex);
1868 fcoe_ctlr_device_delete(fcoe_ctlr_to_ctlr_dev(ctlr));
1869 goto out;
1870 case NETDEV_FEAT_CHANGE:
1871 fcoe_netdev_features_change(lport, netdev);
1872 break;
1873 default:
1874 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
1875 "from netdev netlink\n", event);
1876 }
1877
1878 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
1879
1880 if (link_possible && !fcoe_link_ok(lport)) {
1881 switch (cdev->enabled) {
1882 case FCOE_CTLR_DISABLED:
1883 pr_info("Link up while interface is disabled.\n");
1884 break;
1885 case FCOE_CTLR_ENABLED:
1886 case FCOE_CTLR_UNUSED:
1887 fcoe_ctlr_link_up(ctlr);
1888 }
1889 } else if (fcoe_ctlr_link_down(ctlr)) {
1890 switch (cdev->enabled) {
1891 case FCOE_CTLR_DISABLED:
1892 pr_info("Link down while interface is disabled.\n");
1893 break;
1894 case FCOE_CTLR_ENABLED:
1895 case FCOE_CTLR_UNUSED:
1896 this_cpu_inc(lport->stats->LinkFailureCount);
1897 fcoe_clean_pending_queue(lport);
1898 }
1899 }
1900out:
1901 return rc;
1902}
1903
1904/**
1905 * fcoe_disable() - Disables a FCoE interface
1906 * @netdev : The net_device object the Ethernet interface to create on
1907 *
1908 * Called from fcoe transport.
1909 *
1910 * Returns: 0 for success
1911 *
1912 * Deprecated: use fcoe_ctlr_enabled()
1913 */
1914static int fcoe_disable(struct net_device *netdev)
1915{
1916 struct fcoe_ctlr *ctlr;
1917 struct fcoe_interface *fcoe;
1918 int rc = 0;
1919
1920 mutex_lock(&fcoe_config_mutex);
1921
1922 rtnl_lock();
1923 fcoe = fcoe_hostlist_lookup_port(netdev);
1924 rtnl_unlock();
1925
1926 if (fcoe) {
1927 ctlr = fcoe_to_ctlr(fcoe);
1928 fcoe_ctlr_link_down(ctlr);
1929 fcoe_clean_pending_queue(ctlr->lp);
1930 } else
1931 rc = -ENODEV;
1932
1933 mutex_unlock(&fcoe_config_mutex);
1934 return rc;
1935}
1936
1937/**
1938 * fcoe_enable() - Enables a FCoE interface
1939 * @netdev : The net_device object the Ethernet interface to create on
1940 *
1941 * Called from fcoe transport.
1942 *
1943 * Returns: 0 for success
1944 */
1945static int fcoe_enable(struct net_device *netdev)
1946{
1947 struct fcoe_ctlr *ctlr;
1948 struct fcoe_interface *fcoe;
1949 int rc = 0;
1950
1951 mutex_lock(&fcoe_config_mutex);
1952 rtnl_lock();
1953 fcoe = fcoe_hostlist_lookup_port(netdev);
1954 rtnl_unlock();
1955
1956 if (!fcoe) {
1957 rc = -ENODEV;
1958 goto out;
1959 }
1960
1961 ctlr = fcoe_to_ctlr(fcoe);
1962
1963 if (!fcoe_link_ok(ctlr->lp))
1964 fcoe_ctlr_link_up(ctlr);
1965
1966out:
1967 mutex_unlock(&fcoe_config_mutex);
1968 return rc;
1969}
1970
1971/**
1972 * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller
1973 * @cdev: The FCoE Controller that is being enabled or disabled
1974 *
1975 * fcoe_sysfs will ensure that the state of 'enabled' has
1976 * changed, so no checking is necessary here. This routine simply
1977 * calls fcoe_enable or fcoe_disable, both of which are deprecated.
1978 * When those routines are removed the functionality can be merged
1979 * here.
1980 */
1981static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev)
1982{
1983 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev);
1984 struct fc_lport *lport = ctlr->lp;
1985 struct net_device *netdev = fcoe_netdev(lport);
1986
1987 switch (cdev->enabled) {
1988 case FCOE_CTLR_ENABLED:
1989 return fcoe_enable(netdev);
1990 case FCOE_CTLR_DISABLED:
1991 return fcoe_disable(netdev);
1992 case FCOE_CTLR_UNUSED:
1993 default:
1994 return -ENOTSUPP;
1995 }
1996}
1997
1998/**
1999 * fcoe_ctlr_mode() - Switch FIP mode
2000 * @ctlr_dev: The FCoE Controller that is being modified
2001 *
2002 * When the FIP mode has been changed we need to update
2003 * the multicast addresses to ensure we get the correct
2004 * frames.
2005 */
2006static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev)
2007{
2008 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
2009 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);
2010
2011 if (ctlr_dev->mode == FIP_CONN_TYPE_VN2VN &&
2012 ctlr->mode != FIP_MODE_VN2VN) {
2013 dev_mc_del(fcoe->netdev, FIP_ALL_ENODE_MACS);
2014 dev_mc_add(fcoe->netdev, FIP_ALL_VN2VN_MACS);
2015 dev_mc_add(fcoe->netdev, FIP_ALL_P2P_MACS);
2016 } else if (ctlr->mode != FIP_MODE_FABRIC) {
2017 dev_mc_del(fcoe->netdev, FIP_ALL_VN2VN_MACS);
2018 dev_mc_del(fcoe->netdev, FIP_ALL_P2P_MACS);
2019 dev_mc_add(fcoe->netdev, FIP_ALL_ENODE_MACS);
2020 }
2021 fcoe_ctlr_set_fip_mode(ctlr_dev);
2022}
2023
2024/**
2025 * fcoe_destroy() - Destroy a FCoE interface
2026 * @netdev : The net_device object the Ethernet interface to create on
2027 *
2028 * Called from fcoe transport
2029 *
2030 * Returns: 0 for success
2031 */
2032static int fcoe_destroy(struct net_device *netdev)
2033{
2034 struct fcoe_ctlr *ctlr;
2035 struct fcoe_interface *fcoe;
2036 struct fc_lport *lport;
2037 struct fcoe_port *port;
2038 int rc = 0;
2039
2040 mutex_lock(&fcoe_config_mutex);
2041 rtnl_lock();
2042 fcoe = fcoe_hostlist_lookup_port(netdev);
2043 if (!fcoe) {
2044 rc = -ENODEV;
2045 goto out_nodev;
2046 }
2047 ctlr = fcoe_to_ctlr(fcoe);
2048 lport = ctlr->lp;
2049 port = lport_priv(lport);
2050 list_del(&fcoe->list);
2051 queue_work(fcoe_wq, &port->destroy_work);
2052out_nodev:
2053 rtnl_unlock();
2054 mutex_unlock(&fcoe_config_mutex);
2055 return rc;
2056}
2057
2058/**
2059 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
2060 * @work: Handle to the FCoE port to be destroyed
2061 */
2062static void fcoe_destroy_work(struct work_struct *work)
2063{
2064 struct fcoe_ctlr_device *cdev;
2065 struct fcoe_ctlr *ctlr;
2066 struct fcoe_port *port;
2067 struct fcoe_interface *fcoe;
2068
2069 port = container_of(work, struct fcoe_port, destroy_work);
2070
2071 fcoe_vport_remove(port->lport);
2072
2073 mutex_lock(&fcoe_config_mutex);
2074
2075 fcoe = port->priv;
2076 ctlr = fcoe_to_ctlr(fcoe);
2077 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2078
2079 rtnl_lock();
2080 fcoe_if_destroy(port->lport);
2081 if (!fcoe->removed)
2082 fcoe_interface_remove(fcoe);
2083 rtnl_unlock();
2084 fcoe_interface_cleanup(fcoe);
2085
2086 mutex_unlock(&fcoe_config_mutex);
2087
2088 fcoe_ctlr_device_delete(cdev);
2089}
2090
2091/**
2092 * fcoe_match() - Check if the FCoE is supported on the given netdevice
2093 * @netdev : The net_device object the Ethernet interface to create on
2094 *
2095 * Called from fcoe transport.
2096 *
2097 * Returns: always returns true as this is the default FCoE transport,
2098 * i.e., support all netdevs.
2099 */
2100static bool fcoe_match(struct net_device *netdev)
2101{
2102 return true;
2103}
2104
2105/**
2106 * fcoe_dcb_create() - Initialize DCB attributes and hooks
2107 * @fcoe: The new FCoE interface
2108 */
2109static void fcoe_dcb_create(struct fcoe_interface *fcoe)
2110{
2111 int ctlr_prio = TC_PRIO_BESTEFFORT;
2112 int fcoe_prio = TC_PRIO_INTERACTIVE;
2113 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2114#ifdef CONFIG_DCB
2115 int dcbx;
2116 u8 fup, up;
2117 struct net_device *netdev = fcoe->realdev;
2118 struct dcb_app app = {
2119 .priority = 0,
2120 .protocol = ETH_P_FCOE
2121 };
2122
2123 /* setup DCB priority attributes. */
2124 if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) {
2125 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
2126
2127 if (dcbx & DCB_CAP_DCBX_VER_IEEE) {
2128 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
2129 up = dcb_ieee_getapp_mask(netdev, &app);
2130 app.protocol = ETH_P_FIP;
2131 fup = dcb_ieee_getapp_mask(netdev, &app);
2132 } else {
2133 app.selector = DCB_APP_IDTYPE_ETHTYPE;
2134 up = dcb_getapp(netdev, &app);
2135 app.protocol = ETH_P_FIP;
2136 fup = dcb_getapp(netdev, &app);
2137 }
2138
2139 fcoe_prio = ffs(up) ? ffs(up) - 1 : 0;
2140 ctlr_prio = ffs(fup) ? ffs(fup) - 1 : fcoe_prio;
2141 }
2142#endif
2143 fcoe->priority = fcoe_prio;
2144 ctlr->priority = ctlr_prio;
2145}
2146
2147enum fcoe_create_link_state {
2148 FCOE_CREATE_LINK_DOWN,
2149 FCOE_CREATE_LINK_UP,
2150};
2151
2152/**
2153 * _fcoe_create() - (internal) Create a fcoe interface
2154 * @netdev : The net_device object the Ethernet interface to create on
2155 * @fip_mode: The FIP mode for this creation
2156 * @link_state: The ctlr link state on creation
2157 *
2158 * Called from either the libfcoe 'create' module parameter
2159 * via fcoe_create or from fcoe_syfs's ctlr_create file.
2160 *
2161 * libfcoe's 'create' module parameter is deprecated so some
2162 * consolidation of code can be done when that interface is
2163 * removed.
2164 */
2165static int _fcoe_create(struct net_device *netdev, enum fip_mode fip_mode,
2166 enum fcoe_create_link_state link_state)
2167{
2168 int rc = 0;
2169 struct fcoe_ctlr_device *ctlr_dev;
2170 struct fcoe_ctlr *ctlr;
2171 struct fcoe_interface *fcoe;
2172 struct fc_lport *lport;
2173
2174 mutex_lock(&fcoe_config_mutex);
2175 rtnl_lock();
2176
2177 /* look for existing lport */
2178 if (fcoe_hostlist_lookup(netdev)) {
2179 rc = -EEXIST;
2180 goto out_nodev;
2181 }
2182
2183 fcoe = fcoe_interface_create(netdev, fip_mode);
2184 if (IS_ERR(fcoe)) {
2185 rc = PTR_ERR(fcoe);
2186 goto out_nodev;
2187 }
2188
2189 ctlr = fcoe_to_ctlr(fcoe);
2190 ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr);
2191 lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0);
2192 if (IS_ERR(lport)) {
2193 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
2194 netdev->name);
2195 rc = -EIO;
2196 if (!fcoe->removed)
2197 fcoe_interface_remove(fcoe);
2198 rtnl_unlock();
2199 fcoe_interface_cleanup(fcoe);
2200 mutex_unlock(&fcoe_config_mutex);
2201 fcoe_ctlr_device_delete(ctlr_dev);
2202 return rc;
2203 }
2204
2205 /* Make this the "master" N_Port */
2206 ctlr->lp = lport;
2207
2208 /* setup DCB priority attributes. */
2209 fcoe_dcb_create(fcoe);
2210
2211 /* start FIP Discovery and FLOGI */
2212 lport->boot_time = jiffies;
2213 fc_fabric_login(lport);
2214
2215 /*
2216 * If the fcoe_ctlr_device is to be set to DISABLED
2217 * it must be done after the lport is added to the
2218 * hostlist, but before the rtnl_lock is released.
2219 * This is because the rtnl_lock protects the
2220 * hostlist that fcoe_device_notification uses. If
2221 * the FCoE Controller is intended to be created
2222 * DISABLED then 'enabled' needs to be considered
2223 * handling link events. 'enabled' must be set
2224 * before the lport can be found in the hostlist
2225 * when a link up event is received.
2226 */
2227 if (link_state == FCOE_CREATE_LINK_UP)
2228 ctlr_dev->enabled = FCOE_CTLR_ENABLED;
2229 else
2230 ctlr_dev->enabled = FCOE_CTLR_DISABLED;
2231
2232 if (link_state == FCOE_CREATE_LINK_UP &&
2233 !fcoe_link_ok(lport)) {
2234 rtnl_unlock();
2235 fcoe_ctlr_link_up(ctlr);
2236 mutex_unlock(&fcoe_config_mutex);
2237 return rc;
2238 }
2239
2240out_nodev:
2241 rtnl_unlock();
2242 mutex_unlock(&fcoe_config_mutex);
2243
2244 return rc;
2245}
2246
2247/**
2248 * fcoe_create() - Create a fcoe interface
2249 * @netdev : The net_device object the Ethernet interface to create on
2250 * @fip_mode: The FIP mode for this creation
2251 *
2252 * Called from fcoe transport
2253 *
2254 * Returns: 0 for success
2255 */
2256static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode)
2257{
2258 return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP);
2259}
2260
2261/**
2262 * fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs
2263 * @netdev: The net_device to be used by the allocated FCoE Controller
2264 *
2265 * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr
2266 * in a link_down state. The allows the user an opportunity to configure
2267 * the FCoE Controller from sysfs before enabling the FCoE Controller.
2268 *
2269 * Creating in with this routine starts the FCoE Controller in Fabric
2270 * mode. The user can change to VN2VN or another mode before enabling.
2271 */
2272static int fcoe_ctlr_alloc(struct net_device *netdev)
2273{
2274 return _fcoe_create(netdev, FIP_MODE_FABRIC,
2275 FCOE_CREATE_LINK_DOWN);
2276}
2277
2278/**
2279 * fcoe_link_ok() - Check if the link is OK for a local port
2280 * @lport: The local port to check link on
2281 *
2282 * Returns: 0 if link is UP and OK, -1 if not
2283 *
2284 */
2285static int fcoe_link_ok(struct fc_lport *lport)
2286{
2287 struct net_device *netdev = fcoe_netdev(lport);
2288
2289 if (netif_oper_up(netdev))
2290 return 0;
2291 return -1;
2292}
2293
2294/**
2295 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2296 * @lport: The local port whose skbs are to be cleared
2297 *
2298 * Must be called with fcoe_create_mutex held to single-thread completion.
2299 *
2300 * This flushes the pending skbs by flush the work item for each CPU. The work
2301 * item on each possible CPU is flushed because we may have used the per-CPU
2302 * struct of an offline CPU.
2303 */
2304static void fcoe_percpu_clean(struct fc_lport *lport)
2305{
2306 struct fcoe_percpu_s *pp;
2307 unsigned int cpu;
2308
2309 for_each_possible_cpu(cpu) {
2310 pp = &per_cpu(fcoe_percpu, cpu);
2311
2312 flush_work(&pp->work);
2313 }
2314}
2315
2316/**
2317 * fcoe_reset() - Reset a local port
2318 * @shost: The SCSI host associated with the local port to be reset
2319 *
2320 * Returns: Always 0 (return value required by FC transport template)
2321 */
2322static int fcoe_reset(struct Scsi_Host *shost)
2323{
2324 struct fc_lport *lport = shost_priv(shost);
2325 struct fcoe_port *port = lport_priv(lport);
2326 struct fcoe_interface *fcoe = port->priv;
2327 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2328 struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2329
2330 fcoe_ctlr_link_down(ctlr);
2331 fcoe_clean_pending_queue(ctlr->lp);
2332
2333 if (cdev->enabled != FCOE_CTLR_DISABLED &&
2334 !fcoe_link_ok(ctlr->lp))
2335 fcoe_ctlr_link_up(ctlr);
2336 return 0;
2337}
2338
2339/**
2340 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2341 * @netdev: The net device used as a key
2342 *
2343 * Locking: Must be called with the RNL mutex held.
2344 *
2345 * Returns: NULL or the FCoE interface
2346 */
2347static struct fcoe_interface *
2348fcoe_hostlist_lookup_port(const struct net_device *netdev)
2349{
2350 struct fcoe_interface *fcoe;
2351
2352 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
2353 if (fcoe->netdev == netdev)
2354 return fcoe;
2355 }
2356 return NULL;
2357}
2358
2359/**
2360 * fcoe_hostlist_lookup() - Find the local port associated with a
2361 * given net device
2362 * @netdev: The netdevice used as a key
2363 *
2364 * Locking: Must be called with the RTNL mutex held
2365 *
2366 * Returns: NULL or the local port
2367 */
2368static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
2369{
2370 struct fcoe_ctlr *ctlr;
2371 struct fcoe_interface *fcoe;
2372
2373 fcoe = fcoe_hostlist_lookup_port(netdev);
2374 ctlr = fcoe_to_ctlr(fcoe);
2375 return (fcoe) ? ctlr->lp : NULL;
2376}
2377
2378/**
2379 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2380 * port to the hostlist
2381 * @lport: The local port that identifies the FCoE interface to be added
2382 *
2383 * Locking: must be called with the RTNL mutex held
2384 *
2385 * Returns: 0 for success
2386 */
2387static int fcoe_hostlist_add(const struct fc_lport *lport)
2388{
2389 struct fcoe_interface *fcoe;
2390 struct fcoe_port *port;
2391
2392 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2393 if (!fcoe) {
2394 port = lport_priv(lport);
2395 fcoe = port->priv;
2396 list_add_tail(&fcoe->list, &fcoe_hostlist);
2397 }
2398 return 0;
2399}
2400
2401/**
2402 * fcoe_hostlist_del() - Remove the FCoE interface identified by a local
2403 * port to the hostlist
2404 * @lport: The local port that identifies the FCoE interface to be added
2405 *
2406 * Locking: must be called with the RTNL mutex held
2407 *
2408 */
2409static void fcoe_hostlist_del(const struct fc_lport *lport)
2410{
2411 struct fcoe_interface *fcoe;
2412 struct fcoe_port *port;
2413
2414 port = lport_priv(lport);
2415 fcoe = port->priv;
2416 list_del(&fcoe->list);
2417 return;
2418}
2419
2420static struct fcoe_transport fcoe_sw_transport = {
2421 .name = {FCOE_TRANSPORT_DEFAULT},
2422 .attached = false,
2423 .list = LIST_HEAD_INIT(fcoe_sw_transport.list),
2424 .match = fcoe_match,
2425 .alloc = fcoe_ctlr_alloc,
2426 .create = fcoe_create,
2427 .destroy = fcoe_destroy,
2428 .enable = fcoe_enable,
2429 .disable = fcoe_disable,
2430};
2431
2432/**
2433 * fcoe_init() - Initialize fcoe.ko
2434 *
2435 * Returns: 0 on success, or a negative value on failure
2436 */
2437static int __init fcoe_init(void)
2438{
2439 struct fcoe_percpu_s *p;
2440 unsigned int cpu;
2441 int rc = 0;
2442
2443 fcoe_wq = alloc_workqueue("fcoe", WQ_PERCPU, 0);
2444 if (!fcoe_wq)
2445 return -ENOMEM;
2446
2447 /* register as a fcoe transport */
2448 rc = fcoe_transport_attach(&fcoe_sw_transport);
2449 if (rc) {
2450 printk(KERN_ERR "failed to register an fcoe transport, check "
2451 "if libfcoe is loaded\n");
2452 goto out_destroy;
2453 }
2454
2455 mutex_lock(&fcoe_config_mutex);
2456
2457 for_each_possible_cpu(cpu) {
2458 p = per_cpu_ptr(&fcoe_percpu, cpu);
2459 INIT_WORK(&p->work, fcoe_receive_work);
2460 skb_queue_head_init(&p->fcoe_rx_list);
2461 local_lock_init(&p->lock);
2462 }
2463
2464 /* Setup link change notification */
2465 fcoe_dev_setup();
2466
2467 rc = fcoe_if_init();
2468 if (rc)
2469 goto out_free;
2470
2471 mutex_unlock(&fcoe_config_mutex);
2472 return 0;
2473
2474out_free:
2475 mutex_unlock(&fcoe_config_mutex);
2476 fcoe_transport_detach(&fcoe_sw_transport);
2477out_destroy:
2478 destroy_workqueue(fcoe_wq);
2479 return rc;
2480}
2481module_init(fcoe_init);
2482
2483/**
2484 * fcoe_exit() - Clean up fcoe.ko
2485 *
2486 * Returns: 0 on success or a negative value on failure
2487 */
2488static void __exit fcoe_exit(void)
2489{
2490 struct fcoe_interface *fcoe, *tmp;
2491 struct fcoe_ctlr *ctlr;
2492 struct fcoe_port *port;
2493 unsigned int cpu;
2494
2495 mutex_lock(&fcoe_config_mutex);
2496
2497 fcoe_dev_cleanup();
2498
2499 /* releases the associated fcoe hosts */
2500 rtnl_lock();
2501 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
2502 ctlr = fcoe_to_ctlr(fcoe);
2503 port = lport_priv(ctlr->lp);
2504 fcoe_hostlist_del(port->lport);
2505 queue_work(fcoe_wq, &port->destroy_work);
2506 }
2507 rtnl_unlock();
2508
2509 for_each_possible_cpu(cpu)
2510 fcoe_thread_cleanup_local(cpu);
2511
2512 mutex_unlock(&fcoe_config_mutex);
2513
2514 /*
2515 * destroy_work's may be chained but destroy_workqueue()
2516 * can take care of them. Just kill the fcoe_wq.
2517 */
2518 destroy_workqueue(fcoe_wq);
2519
2520 /*
2521 * Detaching from the scsi transport must happen after all
2522 * destroys are done on the fcoe_wq. destroy_workqueue will
2523 * enusre the fcoe_wq is flushed.
2524 */
2525 fcoe_if_exit();
2526
2527 /* detach from fcoe transport */
2528 fcoe_transport_detach(&fcoe_sw_transport);
2529}
2530module_exit(fcoe_exit);
2531
2532/**
2533 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2534 * @seq: active sequence in the FLOGI or FDISC exchange
2535 * @fp: response frame, or error encoded in a pointer (timeout)
2536 * @arg: pointer to the fcoe_ctlr structure
2537 *
2538 * This handles MAC address management for FCoE, then passes control on to
2539 * the libfc FLOGI response handler.
2540 */
2541static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2542{
2543 struct fcoe_ctlr *fip = arg;
2544 struct fc_exch *exch = fc_seq_exch(seq);
2545 struct fc_lport *lport = exch->lp;
2546 u8 *mac;
2547
2548 if (IS_ERR(fp))
2549 goto done;
2550
2551 mac = fr_cb(fp)->granted_mac;
2552 /* pre-FIP */
2553 if (is_zero_ether_addr(mac))
2554 fcoe_ctlr_recv_flogi(fip, lport, fp);
2555 else
2556 fcoe_update_src_mac(lport, mac);
2557done:
2558 fc_lport_flogi_resp(seq, fp, lport);
2559}
2560
2561/**
2562 * fcoe_logo_resp() - FCoE specific LOGO response handler
2563 * @seq: active sequence in the LOGO exchange
2564 * @fp: response frame, or error encoded in a pointer (timeout)
2565 * @arg: pointer to the fcoe_ctlr structure
2566 *
2567 * This handles MAC address management for FCoE, then passes control on to
2568 * the libfc LOGO response handler.
2569 */
2570static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2571{
2572 struct fc_lport *lport = arg;
2573 static u8 zero_mac[ETH_ALEN] = { 0 };
2574
2575 if (!IS_ERR(fp))
2576 fcoe_update_src_mac(lport, zero_mac);
2577 fc_lport_logo_resp(seq, fp, lport);
2578}
2579
2580/*
2581 * fcoe_elsct_send - FCoE specific ELS handler
2582 *
2583 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2584 * using FCoE specific response handlers and passing the FIP controller as
2585 * the argument (the lport is still available from the exchange).
2586 *
2587 * Most of the work here is just handed off to the libfc routine.
2588 */
2589static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2590 struct fc_frame *fp, unsigned int op,
2591 void (*resp)(struct fc_seq *,
2592 struct fc_frame *,
2593 void *),
2594 void *arg, u32 timeout)
2595{
2596 struct fcoe_port *port = lport_priv(lport);
2597 struct fcoe_interface *fcoe = port->priv;
2598 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
2599 struct fc_frame_header *fh = fc_frame_header_get(fp);
2600
2601 switch (op) {
2602 case ELS_FLOGI:
2603 case ELS_FDISC:
2604 if (lport->point_to_multipoint)
2605 break;
2606 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2607 fip, timeout);
2608 case ELS_LOGO:
2609 /* only hook onto fabric logouts, not port logouts */
2610 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2611 break;
2612 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
2613 lport, timeout);
2614 }
2615 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2616}
2617
2618/**
2619 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2620 * @vport: fc_vport object to create a new fc_host for
2621 * @disabled: start the new fc_host in a disabled state by default?
2622 *
2623 * Returns: 0 for success
2624 */
2625static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2626{
2627 struct Scsi_Host *shost = vport_to_shost(vport);
2628 struct fc_lport *n_port = shost_priv(shost);
2629 struct fcoe_port *port = lport_priv(n_port);
2630 struct fcoe_interface *fcoe = port->priv;
2631 struct net_device *netdev = fcoe->netdev;
2632 struct fc_lport *vn_port;
2633 int rc;
2634 char buf[32];
2635
2636 rc = fcoe_validate_vport_create(vport);
2637 if (rc) {
2638 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
2639 printk(KERN_ERR "fcoe: Failed to create vport, "
2640 "WWPN (0x%s) already exists\n",
2641 buf);
2642 return rc;
2643 }
2644
2645 mutex_lock(&fcoe_config_mutex);
2646 rtnl_lock();
2647 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
2648 rtnl_unlock();
2649 mutex_unlock(&fcoe_config_mutex);
2650
2651 if (IS_ERR(vn_port)) {
2652 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2653 netdev->name);
2654 return -EIO;
2655 }
2656
2657 if (disabled) {
2658 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2659 } else {
2660 vn_port->boot_time = jiffies;
2661 fc_fabric_login(vn_port);
2662 fc_vport_setlink(vn_port);
2663 }
2664 return 0;
2665}
2666
2667/**
2668 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2669 * @vport: fc_vport object that is being destroyed
2670 *
2671 * Returns: 0 for success
2672 */
2673static int fcoe_vport_destroy(struct fc_vport *vport)
2674{
2675 struct Scsi_Host *shost = vport_to_shost(vport);
2676 struct fc_lport *n_port = shost_priv(shost);
2677 struct fc_lport *vn_port = vport->dd_data;
2678
2679 mutex_lock(&n_port->lp_mutex);
2680 list_del(&vn_port->list);
2681 mutex_unlock(&n_port->lp_mutex);
2682
2683 mutex_lock(&fcoe_config_mutex);
2684 rtnl_lock();
2685 fcoe_if_destroy(vn_port);
2686 rtnl_unlock();
2687 mutex_unlock(&fcoe_config_mutex);
2688
2689 return 0;
2690}
2691
2692/**
2693 * fcoe_vport_remove() - remove attached vports
2694 * @lport: lport for which the vports should be removed
2695 */
2696static void fcoe_vport_remove(struct fc_lport *lport)
2697{
2698 struct Scsi_Host *shost;
2699 struct fc_host_attrs *fc_host;
2700 unsigned long flags;
2701 struct fc_vport *vport;
2702 struct fc_vport *next_vport;
2703
2704 shost = lport->host;
2705 fc_host = shost_to_fc_host(shost);
2706
2707 /* Loop through all the vports and mark them for deletion */
2708 spin_lock_irqsave(shost->host_lock, flags);
2709 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
2710 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
2711 continue;
2712 } else {
2713 vport->flags |= FC_VPORT_DELETING;
2714 queue_work(fc_host_work_q(shost),
2715 &vport->vport_delete_work);
2716 }
2717 }
2718 spin_unlock_irqrestore(shost->host_lock, flags);
2719
2720 flush_workqueue(fc_host_work_q(shost));
2721}
2722
2723/**
2724 * fcoe_vport_disable() - change vport state
2725 * @vport: vport to bring online/offline
2726 * @disable: should the vport be disabled?
2727 */
2728static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2729{
2730 struct fc_lport *lport = vport->dd_data;
2731
2732 if (disable) {
2733 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2734 fc_fabric_logoff(lport);
2735 } else {
2736 lport->boot_time = jiffies;
2737 fc_fabric_login(lport);
2738 fc_vport_setlink(lport);
2739 }
2740
2741 return 0;
2742}
2743
2744/**
2745 * fcoe_set_vport_symbolic_name() - append vport string to symbolic name
2746 * @vport: fc_vport with a new symbolic name string
2747 *
2748 * After generating a new symbolic name string, a new RSPN_ID request is
2749 * sent to the name server. There is no response handler, so if it fails
2750 * for some reason it will not be retried.
2751 */
2752static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2753{
2754 struct fc_lport *lport = vport->dd_data;
2755 struct fc_frame *fp;
2756 size_t len;
2757
2758 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2759 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2760 fcoe_netdev(lport)->name, vport->symbolic_name);
2761
2762 if (lport->state != LPORT_ST_READY)
2763 return;
2764
2765 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2766 fp = fc_frame_alloc(lport,
2767 sizeof(struct fc_ct_hdr) +
2768 sizeof(struct fc_ns_rspn) + len);
2769 if (!fp)
2770 return;
2771 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
2772 NULL, NULL, 3 * lport->r_a_tov);
2773}
2774
2775static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev)
2776{
2777 struct fcoe_ctlr_device *ctlr_dev =
2778 fcoe_fcf_dev_to_ctlr_dev(fcf_dev);
2779 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
2780 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);
2781
2782 fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev);
2783}
2784
2785/**
2786 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2787 * @lport: the local port
2788 * @port_id: the port ID
2789 * @fp: the received frame, if any, that caused the port_id to be set.
2790 *
2791 * This routine handles the case where we received a FLOGI and are
2792 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2793 * so it can set the non-mapped mode and gateway address.
2794 *
2795 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2796 */
2797static void fcoe_set_port_id(struct fc_lport *lport,
2798 u32 port_id, struct fc_frame *fp)
2799{
2800 struct fcoe_port *port = lport_priv(lport);
2801 struct fcoe_interface *fcoe = port->priv;
2802 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2803
2804 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
2805 fcoe_ctlr_recv_flogi(ctlr, lport, fp);
2806}