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bonding: remove ifenslave.c from kernel source
[deliverable/linux.git] / drivers / scsi / fcoe / fcoe.c
CommitLineData
85b4aa49 1/*
af7f85d9 2 * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved.
85b4aa49
RL		 3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
16 *
17 * Maintained at www.Open-FCoE.org
18 */
19
20#include <linux/module.h>
85b4aa49 21#include <linux/spinlock.h>
85b4aa49
RL		 22#include <linux/netdevice.h>
23#include <linux/etherdevice.h>
24#include <linux/ethtool.h>
25#include <linux/if_ether.h>
26#include <linux/if_vlan.h>
85b4aa49 27#include <linux/crc32.h>
5a0e3ad6 28#include <linux/slab.h>
85b4aa49
RL		 29#include <linux/cpu.h>
30#include <linux/fs.h>
31#include <linux/sysfs.h>
32#include <linux/ctype.h>
2ca32b48 33#include <linux/workqueue.h>
6f6c2aa3 34#include <net/dcbnl.h>
35#include <net/dcbevent.h>
85b4aa49
RL		 36#include <scsi/scsi_tcq.h>
37#include <scsi/scsicam.h>
38#include <scsi/scsi_transport.h>
39#include <scsi/scsi_transport_fc.h>
40#include <net/rtnetlink.h>
41
42#include <scsi/fc/fc_encaps.h>
97c8389d 43#include <scsi/fc/fc_fip.h>
8d55e507 44#include <scsi/fc/fc_fcoe.h>
85b4aa49
RL		 45
46#include <scsi/libfc.h>
47#include <scsi/fc_frame.h>
48#include <scsi/libfcoe.h>
85b4aa49 49
fdd78027 50#include "fcoe.h"
7f349142 51
85b4aa49
RL		 52MODULE_AUTHOR("Open-FCoE.org");
53MODULE_DESCRIPTION("FCoE");
9b34ecff 54MODULE_LICENSE("GPL v2");
85b4aa49 55
05cc7390 56/* Performance tuning parameters for fcoe */
860eca2b 57static unsigned int fcoe_ddp_min = 4096;
05cc7390
YZ		 58module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR);
59MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \
60 "Direct Data Placement (DDP).");
61
7c9c6841
BVA		 62unsigned int fcoe_debug_logging;
63module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR);
64MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
65
66static DEFINE_MUTEX(fcoe_config_mutex);
dfc1d0fe 67
2ca32b48
TH		 68static struct workqueue_struct *fcoe_wq;
69
e7a51997
JE		 70/* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */
71static DECLARE_COMPLETION(fcoe_flush_completion);
72
85b4aa49 73/* fcoe host list */
090eb6c4 74/* must only by accessed under the RTNL mutex */
7c9c6841
BVA		 75static LIST_HEAD(fcoe_hostlist);
76static DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
85b4aa49 77
dd3fd72e 78/* Function Prototypes */
1875f27e 79static int fcoe_reset(struct Scsi_Host *);
fdd78027
VD		 80static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
81static int fcoe_rcv(struct sk_buff *, struct net_device *,
82 struct packet_type *, struct net_device *);
1875f27e 83static int fcoe_percpu_receive_thread(void *);
1875f27e
RL		 84static void fcoe_percpu_clean(struct fc_lport *);
85static int fcoe_link_ok(struct fc_lport *);
fdd78027
VD		 86
87static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
88static int fcoe_hostlist_add(const struct fc_lport *);
f9184df3 89static void fcoe_hostlist_del(const struct fc_lport *);
fdd78027 90
85b4aa49
RL		 91static int fcoe_device_notification(struct notifier_block *, ulong, void *);
92static void fcoe_dev_setup(void);
93static void fcoe_dev_cleanup(void);
1875f27e
RL		 94static struct fcoe_interface
95*fcoe_hostlist_lookup_port(const struct net_device *);
96
97static int fcoe_fip_recv(struct sk_buff *, struct net_device *,
98 struct packet_type *, struct net_device *);
99
100static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *);
101static void fcoe_update_src_mac(struct fc_lport *, u8 *);
102static u8 *fcoe_get_src_mac(struct fc_lport *);
103static void fcoe_destroy_work(struct work_struct *);
104
105static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *,
106 unsigned int);
107static int fcoe_ddp_done(struct fc_lport *, u16);
71f89491
YZ		 108static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *,
109 unsigned int);
1875f27e 110static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *);
6f6c2aa3 111static int fcoe_dcb_app_notification(struct notifier_block *notifier,
112 ulong event, void *ptr);
1875f27e 113
78a58246
YZ		 114static bool fcoe_match(struct net_device *netdev);
115static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode);
116static int fcoe_destroy(struct net_device *netdev);
117static int fcoe_enable(struct net_device *netdev);
118static int fcoe_disable(struct net_device *netdev);
1875f27e 119
435c8667
RL		 120/* fcoe_syfs control interface handlers */
121static int fcoe_ctlr_alloc(struct net_device *netdev);
122static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev);
123
124
1875f27e
RL		 125static struct fc_seq *fcoe_elsct_send(struct fc_lport *,
126 u32 did, struct fc_frame *,
127 unsigned int op,
128 void (*resp)(struct fc_seq *,
129 struct fc_frame *,
130 void *),
131 void *, u32 timeout);
859b7b64 132static void fcoe_recv_frame(struct sk_buff *skb);
1875f27e 133
1875f27e 134/* notification function for packets from net device */
85b4aa49
RL		 135static struct notifier_block fcoe_notifier = {
136 .notifier_call = fcoe_device_notification,
137};
138
1875f27e
RL		 139/* notification function for CPU hotplug events */
140static struct notifier_block fcoe_cpu_notifier = {
141 .notifier_call = fcoe_cpu_callback,
142};
143
6f6c2aa3 144/* notification function for DCB events */
145static struct notifier_block dcb_notifier = {
146 .notifier_call = fcoe_dcb_app_notification,
147};
148
8ca86f84
YZ		 149static struct scsi_transport_template *fcoe_nport_scsi_transport;
150static struct scsi_transport_template *fcoe_vport_scsi_transport;
7f349142 151
1875f27e
RL		 152static int fcoe_vport_destroy(struct fc_vport *);
153static int fcoe_vport_create(struct fc_vport *, bool disabled);
154static int fcoe_vport_disable(struct fc_vport *, bool disable);
155static void fcoe_set_vport_symbolic_name(struct fc_vport *);
7d65b0df 156static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *);
8d55e507
RL		 157static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *);
158
159static struct fcoe_sysfs_function_template fcoe_sysfs_templ = {
435c8667
RL		 160 .set_fcoe_ctlr_mode = fcoe_ctlr_set_fip_mode,
161 .set_fcoe_ctlr_enabled = fcoe_ctlr_enabled,
8d55e507
RL		 162 .get_fcoe_ctlr_link_fail = fcoe_ctlr_get_lesb,
163 .get_fcoe_ctlr_vlink_fail = fcoe_ctlr_get_lesb,
164 .get_fcoe_ctlr_miss_fka = fcoe_ctlr_get_lesb,
165 .get_fcoe_ctlr_symb_err = fcoe_ctlr_get_lesb,
166 .get_fcoe_ctlr_err_block = fcoe_ctlr_get_lesb,
167 .get_fcoe_ctlr_fcs_error = fcoe_ctlr_get_lesb,
168
169 .get_fcoe_fcf_selected = fcoe_fcf_get_selected,
170 .get_fcoe_fcf_vlan_id = fcoe_fcf_get_vlan_id,
171};
1875f27e
RL		 172
173static struct libfc_function_template fcoe_libfc_fcn_templ = {
174 .frame_send = fcoe_xmit,
175 .ddp_setup = fcoe_ddp_setup,
176 .ddp_done = fcoe_ddp_done,
71f89491 177 .ddp_target = fcoe_ddp_target,
1875f27e 178 .elsct_send = fcoe_elsct_send,
b84056bf 179 .get_lesb = fcoe_get_lesb,
7d65b0df 180 .lport_set_port_id = fcoe_set_port_id,
1875f27e 181};
9a05753b 182
7c9c6841 183static struct fc_function_template fcoe_nport_fc_functions = {
7f349142
VD		 184 .show_host_node_name = 1,
185 .show_host_port_name = 1,
186 .show_host_supported_classes = 1,
187 .show_host_supported_fc4s = 1,
188 .show_host_active_fc4s = 1,
189 .show_host_maxframe_size = 1,
9f71af2f
NP		 190 .show_host_serial_number = 1,
191 .show_host_manufacturer = 1,
192 .show_host_model = 1,
193 .show_host_model_description = 1,
194 .show_host_hardware_version = 1,
195 .show_host_driver_version = 1,
196 .show_host_firmware_version = 1,
197 .show_host_optionrom_version = 1,
7f349142
VD		 198
199 .show_host_port_id = 1,
200 .show_host_supported_speeds = 1,
201 .get_host_speed = fc_get_host_speed,
202 .show_host_speed = 1,
203 .show_host_port_type = 1,
204 .get_host_port_state = fc_get_host_port_state,
205 .show_host_port_state = 1,
206 .show_host_symbolic_name = 1,
207
208 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
209 .show_rport_maxframe_size = 1,
210 .show_rport_supported_classes = 1,
211
212 .show_host_fabric_name = 1,
213 .show_starget_node_name = 1,
214 .show_starget_port_name = 1,
215 .show_starget_port_id = 1,
216 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
217 .show_rport_dev_loss_tmo = 1,
218 .get_fc_host_stats = fc_get_host_stats,
219 .issue_fc_host_lip = fcoe_reset,
220
221 .terminate_rport_io = fc_rport_terminate_io,
9a05753b
CL		 222
223 .vport_create = fcoe_vport_create,
224 .vport_delete = fcoe_vport_destroy,
225 .vport_disable = fcoe_vport_disable,
dc8596d3 226 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
a51ab396
SM		 227
228 .bsg_request = fc_lport_bsg_request,
7f349142
VD		 229};
230
7c9c6841 231static struct fc_function_template fcoe_vport_fc_functions = {
e9084bb8
CL		 232 .show_host_node_name = 1,
233 .show_host_port_name = 1,
234 .show_host_supported_classes = 1,
235 .show_host_supported_fc4s = 1,
236 .show_host_active_fc4s = 1,
237 .show_host_maxframe_size = 1,
7e5adcfb
NP		 238 .show_host_serial_number = 1,
239 .show_host_manufacturer = 1,
240 .show_host_model = 1,
241 .show_host_model_description = 1,
242 .show_host_hardware_version = 1,
243 .show_host_driver_version = 1,
244 .show_host_firmware_version = 1,
245 .show_host_optionrom_version = 1,
e9084bb8
CL		 246
247 .show_host_port_id = 1,
248 .show_host_supported_speeds = 1,
249 .get_host_speed = fc_get_host_speed,
250 .show_host_speed = 1,
251 .show_host_port_type = 1,
252 .get_host_port_state = fc_get_host_port_state,
253 .show_host_port_state = 1,
254 .show_host_symbolic_name = 1,
255
256 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
257 .show_rport_maxframe_size = 1,
258 .show_rport_supported_classes = 1,
259
260 .show_host_fabric_name = 1,
261 .show_starget_node_name = 1,
262 .show_starget_port_name = 1,
263 .show_starget_port_id = 1,
264 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
265 .show_rport_dev_loss_tmo = 1,
266 .get_fc_host_stats = fc_get_host_stats,
267 .issue_fc_host_lip = fcoe_reset,
268
269 .terminate_rport_io = fc_rport_terminate_io,
a51ab396
SM		 270
271 .bsg_request = fc_lport_bsg_request,
e9084bb8
CL		 272};
273
7f349142
VD		 274static struct scsi_host_template fcoe_shost_template = {
275 .module = THIS_MODULE,
276 .name = "FCoE Driver",
277 .proc_name = FCOE_NAME,
278 .queuecommand = fc_queuecommand,
279 .eh_abort_handler = fc_eh_abort,
280 .eh_device_reset_handler = fc_eh_device_reset,
281 .eh_host_reset_handler = fc_eh_host_reset,
282 .slave_alloc = fc_slave_alloc,
283 .change_queue_depth = fc_change_queue_depth,
284 .change_queue_type = fc_change_queue_type,
285 .this_id = -1,
14caf44c 286 .cmd_per_lun = 3,
7f349142
VD		 287 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
288 .use_clustering = ENABLE_CLUSTERING,
289 .sg_tablesize = SG_ALL,
290 .max_sectors = 0xffff,
291};
292
54b649f8 293/**
1875f27e
RL		 294 * fcoe_interface_setup() - Setup a FCoE interface
295 * @fcoe: The new FCoE interface
296 * @netdev: The net device that the fcoe interface is on
54b649f8
CL		 297 *
298 * Returns : 0 for success
2e70e241 299 * Locking: must be called with the RTNL mutex held
54b649f8
CL		 300 */
301static int fcoe_interface_setup(struct fcoe_interface *fcoe,
302 struct net_device *netdev)
303{
619fe4be 304 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
54b649f8 305 struct netdev_hw_addr *ha;
5bab87e6 306 struct net_device *real_dev;
54b649f8 307 u8 flogi_maddr[ETH_ALEN];
b7a727f1 308 const struct net_device_ops *ops;
54b649f8
CL		 309
310 fcoe->netdev = netdev;
311
b7a727f1
YZ		 312 /* Let LLD initialize for FCoE */
313 ops = netdev->netdev_ops;
314 if (ops->ndo_fcoe_enable) {
315 if (ops->ndo_fcoe_enable(netdev))
316 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
317 " specific feature for LLD.\n");
318 }
319
54b649f8 320 /* Do not support for bonding device */
cc8bdf06 321 if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) {
59d92516 322 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
54b649f8
CL		 323 return -EOPNOTSUPP;
324 }
325
326 /* look for SAN MAC address, if multiple SAN MACs exist, only
327 * use the first one for SPMA */
5bab87e6
YZ		 328 real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ?
329 vlan_dev_real_dev(netdev) : netdev;
d1483bb9 330 fcoe->realdev = real_dev;
54b649f8 331 rcu_read_lock();
5bab87e6 332 for_each_dev_addr(real_dev, ha) {
54b649f8 333 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
bf361707 334 (is_valid_ether_addr(ha->addr))) {
54b649f8
CL		 335 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
336 fip->spma = 1;
337 break;
338 }
339 }
340 rcu_read_unlock();
341
342 /* setup Source Mac Address */
343 if (!fip->spma)
344 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
345
346 /*
347 * Add FCoE MAC address as second unicast MAC address
348 * or enter promiscuous mode if not capable of listening
349 * for multiple unicast MACs.
350 */
54b649f8 351 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
a748ee24 352 dev_uc_add(netdev, flogi_maddr);
54b649f8 353 if (fip->spma)
a748ee24 354 dev_uc_add(netdev, fip->ctl_src_addr);
e10f8c66
JE		 355 if (fip->mode == FIP_MODE_VN2VN) {
356 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS);
357 dev_mc_add(netdev, FIP_ALL_P2P_MACS);
358 } else
359 dev_mc_add(netdev, FIP_ALL_ENODE_MACS);
54b649f8
CL		 360
361 /*
362 * setup the receive function from ethernet driver
363 * on the ethertype for the given device
364 */
365 fcoe->fcoe_packet_type.func = fcoe_rcv;
366 fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
367 fcoe->fcoe_packet_type.dev = netdev;
368 dev_add_pack(&fcoe->fcoe_packet_type);
369
370 fcoe->fip_packet_type.func = fcoe_fip_recv;
371 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
372 fcoe->fip_packet_type.dev = netdev;
373 dev_add_pack(&fcoe->fip_packet_type);
374
375 return 0;
376}
377
030f4e00 378/**
1875f27e
RL		 379 * fcoe_interface_create() - Create a FCoE interface on a net device
380 * @netdev: The net device to create the FCoE interface on
1dd454d9 381 * @fip_mode: The mode to use for FIP
030f4e00
CL		 382 *
383 * Returns: pointer to a struct fcoe_interface or NULL on error
384 */
1dd454d9
JE		 385static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
386 enum fip_state fip_mode)
030f4e00 387{
8d55e507 388 struct fcoe_ctlr_device *ctlr_dev;
619fe4be 389 struct fcoe_ctlr *ctlr;
030f4e00 390 struct fcoe_interface *fcoe;
619fe4be 391 int size;
59d92516 392 int err;
030f4e00 393
7287fb91
RL		 394 if (!try_module_get(THIS_MODULE)) {
395 FCOE_NETDEV_DBG(netdev,
396 "Could not get a reference to the module\n");
397 fcoe = ERR_PTR(-EBUSY);
398 goto out;
399 }
400
619fe4be 401 size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface);
8d55e507
RL		 402 ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ,
403 size);
404 if (!ctlr_dev) {
405 FCOE_DBG("Failed to add fcoe_ctlr_device\n");
7287fb91 406 fcoe = ERR_PTR(-ENOMEM);
6f68794c 407 goto out_putmod;
030f4e00
CL		 408 }
409
8d55e507
RL		 410 ctlr = fcoe_ctlr_device_priv(ctlr_dev);
411 fcoe = fcoe_ctlr_priv(ctlr);
412
2e70e241 413 dev_hold(netdev);
54b649f8
CL		 414
415 /*
416 * Initialize FIP.
417 */
619fe4be
RL		 418 fcoe_ctlr_init(ctlr, fip_mode);
419 ctlr->send = fcoe_fip_send;
420 ctlr->update_mac = fcoe_update_src_mac;
421 ctlr->get_src_addr = fcoe_get_src_mac;
54b649f8 422
59d92516 423 err = fcoe_interface_setup(fcoe, netdev);
424 if (err) {
619fe4be 425 fcoe_ctlr_destroy(ctlr);
8d55e507 426 fcoe_ctlr_device_delete(ctlr_dev);
59d92516 427 dev_put(netdev);
7287fb91 428 fcoe = ERR_PTR(err);
6f68794c 429 goto out_putmod;
59d92516 430 }
030f4e00 431
7287fb91
RL		 432 goto out;
433
6f68794c 434out_putmod:
7287fb91
RL		 435 module_put(THIS_MODULE);
436out:
030f4e00
CL		 437 return fcoe;
438}
439
54b649f8 440/**
433eba04 441 * fcoe_interface_remove() - remove FCoE interface from netdev
1875f27e 442 * @fcoe: The FCoE interface to be cleaned up
2e70e241
CL		 443 *
444 * Caller must be holding the RTNL mutex
54b649f8 445 */
433eba04 446static void fcoe_interface_remove(struct fcoe_interface *fcoe)
54b649f8
CL		 447{
448 struct net_device *netdev = fcoe->netdev;
619fe4be 449 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
54b649f8 450 u8 flogi_maddr[ETH_ALEN];
b7a727f1 451 const struct net_device_ops *ops;
54b649f8
CL		 452
453 /*
454 * Don't listen for Ethernet packets anymore.
455 * synchronize_net() ensures that the packet handlers are not running
456 * on another CPU. dev_remove_pack() would do that, this calls the
457 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
458 */
459 __dev_remove_pack(&fcoe->fcoe_packet_type);
460 __dev_remove_pack(&fcoe->fip_packet_type);
461 synchronize_net();
462
54b649f8 463 /* Delete secondary MAC addresses */
54b649f8 464 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
a748ee24 465 dev_uc_del(netdev, flogi_maddr);
54b649f8 466 if (fip->spma)
a748ee24 467 dev_uc_del(netdev, fip->ctl_src_addr);
e10f8c66
JE		 468 if (fip->mode == FIP_MODE_VN2VN) {
469 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);
470 dev_mc_del(netdev, FIP_ALL_P2P_MACS);
471 } else
472 dev_mc_del(netdev, FIP_ALL_ENODE_MACS);
b7a727f1
YZ		 473
474 /* Tell the LLD we are done w/ FCoE */
475 ops = netdev->netdev_ops;
476 if (ops->ndo_fcoe_disable) {
477 if (ops->ndo_fcoe_disable(netdev))
478 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
479 " specific feature for LLD.\n");
480 }
433eba04
VD		 481 fcoe->removed = 1;
482}
483
484
485/**
486 * fcoe_interface_cleanup() - Clean up a FCoE interface
487 * @fcoe: The FCoE interface to be cleaned up
488 */
489static void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
490{
491 struct net_device *netdev = fcoe->netdev;
619fe4be 492 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
b2085a4e 493
433eba04
VD		 494 rtnl_lock();
495 if (!fcoe->removed)
496 fcoe_interface_remove(fcoe);
848e7d5b
RL		 497 rtnl_unlock();
498
b2085a4e 499 /* Release the self-reference taken during fcoe_interface_create() */
1a8ef414
RL		 500 /* tear-down the FCoE controller */
501 fcoe_ctlr_destroy(fip);
619fe4be 502 scsi_host_put(fip->lp->host);
1a8ef414
RL		 503 dev_put(netdev);
504 module_put(THIS_MODULE);
030f4e00
CL		 505}
506
ab6b85c1 507/**
1875f27e
RL		 508 * fcoe_fip_recv() - Handler for received FIP frames
509 * @skb: The receive skb
510 * @netdev: The associated net device
511 * @ptype: The packet_type structure which was used to register this handler
512 * @orig_dev: The original net_device the the skb was received on.
513 * (in case dev is a bond)
ab6b85c1
VD		 514 *
515 * Returns: 0 for success
516 */
1875f27e 517static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
ab6b85c1
VD		 518 struct packet_type *ptype,
519 struct net_device *orig_dev)
520{
259ad85d 521 struct fcoe_interface *fcoe;
619fe4be 522 struct fcoe_ctlr *ctlr;
ab6b85c1 523
259ad85d 524 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
619fe4be
RL		 525 ctlr = fcoe_to_ctlr(fcoe);
526 fcoe_ctlr_recv(ctlr, skb);
ab6b85c1
VD		 527 return 0;
528}
529
980f5156
VD		 530/**
531 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame
532 * @port: The FCoE port
533 * @skb: The FIP/FCoE packet to be sent
534 */
535static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb)
536{
537 if (port->fcoe_pending_queue.qlen)
538 fcoe_check_wait_queue(port->lport, skb);
539 else if (fcoe_start_io(skb))
540 fcoe_check_wait_queue(port->lport, skb);
541}
542
ab6b85c1 543/**
1875f27e
RL		 544 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
545 * @fip: The FCoE controller
546 * @skb: The FIP packet to be sent
ab6b85c1
VD		 547 */
548static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
549{
3fe9a0ba 550 skb->dev = fcoe_from_ctlr(fip)->netdev;
980f5156 551 fcoe_port_send(lport_priv(fip->lp), skb);
ab6b85c1
VD		 552}
553
554/**
1875f27e
RL		 555 * fcoe_update_src_mac() - Update the Ethernet MAC filters
556 * @lport: The local port to update the source MAC on
557 * @addr: Unicast MAC address to add
ab6b85c1
VD		 558 *
559 * Remove any previously-set unicast MAC filter.
560 * Add secondary FCoE MAC address filter for our OUI.
561 */
11b56188 562static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
ab6b85c1 563{
11b56188 564 struct fcoe_port *port = lport_priv(lport);
8597ae8b 565 struct fcoe_interface *fcoe = port->priv;
25024989 566
11b56188 567 if (!is_zero_ether_addr(port->data_src_addr))
a748ee24 568 dev_uc_del(fcoe->netdev, port->data_src_addr);
11b56188 569 if (!is_zero_ether_addr(addr))
a748ee24 570 dev_uc_add(fcoe->netdev, addr);
11b56188 571 memcpy(port->data_src_addr, addr, ETH_ALEN);
ab6b85c1
VD		 572}
573
11b56188
CL		 574/**
575 * fcoe_get_src_mac() - return the Ethernet source address for an lport
576 * @lport: libfc lport
577 */
578static u8 *fcoe_get_src_mac(struct fc_lport *lport)
579{
580 struct fcoe_port *port = lport_priv(lport);
581
582 return port->data_src_addr;
583}
584
7f349142 585/**
1875f27e
RL		 586 * fcoe_lport_config() - Set up a local port
587 * @lport: The local port to be setup
7f349142
VD		 588 *
589 * Returns: 0 for success
590 */
1875f27e 591static int fcoe_lport_config(struct fc_lport *lport)
7f349142 592{
1875f27e
RL		 593 lport->link_up = 0;
594 lport->qfull = 0;
595 lport->max_retry_count = 3;
596 lport->max_rport_retry_count = 3;
597 lport->e_d_tov = 2 * 1000; /* FC-FS default */
598 lport->r_a_tov = 2 * 2 * 1000;
599 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
600 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
601 lport->does_npiv = 1;
602
603 fc_lport_init_stats(lport);
7f349142
VD		 604
605 /* lport fc_lport related configuration */
1875f27e 606 fc_lport_config(lport);
7f349142
VD		 607
608 /* offload related configuration */
1875f27e
RL		 609 lport->crc_offload = 0;
610 lport->seq_offload = 0;
611 lport->lro_enabled = 0;
612 lport->lro_xid = 0;
613 lport->lso_max = 0;
7f349142
VD		 614
615 return 0;
616}
617
54a5b21d
YZ		 618/**
619 * fcoe_netdev_features_change - Updates the lport's offload flags based
620 * on the LLD netdev's FCoE feature flags
621 */
622static void fcoe_netdev_features_change(struct fc_lport *lport,
623 struct net_device *netdev)
624{
625 mutex_lock(&lport->lp_mutex);
626
627 if (netdev->features & NETIF_F_SG)
628 lport->sg_supp = 1;
629 else
630 lport->sg_supp = 0;
631
632 if (netdev->features & NETIF_F_FCOE_CRC) {
633 lport->crc_offload = 1;
634 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
635 } else {
636 lport->crc_offload = 0;
637 }
638
639 if (netdev->features & NETIF_F_FSO) {
640 lport->seq_offload = 1;
641 lport->lso_max = netdev->gso_max_size;
642 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
643 lport->lso_max);
644 } else {
645 lport->seq_offload = 0;
646 lport->lso_max = 0;
647 }
648
649 if (netdev->fcoe_ddp_xid) {
650 lport->lro_enabled = 1;
651 lport->lro_xid = netdev->fcoe_ddp_xid;
652 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
653 lport->lro_xid);
654 } else {
655 lport->lro_enabled = 0;
656 lport->lro_xid = 0;
657 }
658
659 mutex_unlock(&lport->lp_mutex);
660}
661
7f349142 662/**
1875f27e
RL		 663 * fcoe_netdev_config() - Set up net devive for SW FCoE
664 * @lport: The local port that is associated with the net device
665 * @netdev: The associated net device
7f349142 666 *
1875f27e 667 * Must be called after fcoe_lport_config() as it will use local port mutex
7f349142 668 *
1875f27e 669 * Returns: 0 for success
7f349142 670 */
1875f27e 671static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
7f349142
VD		 672{
673 u32 mfs;
674 u64 wwnn, wwpn;
25024989 675 struct fcoe_interface *fcoe;
619fe4be 676 struct fcoe_ctlr *ctlr;
014f5c3f 677 struct fcoe_port *port;
7f349142
VD		 678
679 /* Setup lport private data to point to fcoe softc */
1875f27e 680 port = lport_priv(lport);
8597ae8b 681 fcoe = port->priv;
619fe4be 682 ctlr = fcoe_to_ctlr(fcoe);
7f349142
VD		 683
684 /*
685 * Determine max frame size based on underlying device and optional
686 * user-configured limit. If the MFS is too low, fcoe_link_ok()
687 * will return 0, so do this first.
688 */
7221d7e5
YZ		 689 mfs = netdev->mtu;
690 if (netdev->features & NETIF_F_FCOE_MTU) {
691 mfs = FCOE_MTU;
692 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
693 }
694 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
1875f27e 695 if (fc_set_mfs(lport, mfs))
7f349142
VD		 696 return -EINVAL;
697
7f349142 698 /* offload features support */
54a5b21d 699 fcoe_netdev_features_change(lport, netdev);
7f349142 700
014f5c3f
CL		 701 skb_queue_head_init(&port->fcoe_pending_queue);
702 port->fcoe_pending_queue_active = 0;
1875f27e 703 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
7f349142 704
5e4f8fe7
RL		 705 fcoe_link_speed_update(lport);
706
1875f27e 707 if (!lport->vport) {
dcece412 708 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
619fe4be 709 wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0);
1875f27e 710 fc_set_wwnn(lport, wwnn);
dcece412 711 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
619fe4be 712 wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr,
cf4aebca 713 2, 0);
1875f27e 714 fc_set_wwpn(lport, wwpn);
9a05753b 715 }
7f349142 716
7f349142
VD		 717 return 0;
718}
719
720/**
1875f27e
RL		 721 * fcoe_shost_config() - Set up the SCSI host associated with a local port
722 * @lport: The local port
1875f27e 723 * @dev: The device associated with the SCSI host
7f349142
VD		 724 *
725 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
726 *
1875f27e 727 * Returns: 0 for success
7f349142 728 */
8ba00a4b 729static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)
7f349142
VD		 730{
731 int rc = 0;
732
733 /* lport scsi host config */
1875f27e
RL		 734 lport->host->max_lun = FCOE_MAX_LUN;
735 lport->host->max_id = FCOE_MAX_FCP_TARGET;
736 lport->host->max_channel = 0;
da87bfab
VD		 737 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;
738
1875f27e 739 if (lport->vport)
8ca86f84 740 lport->host->transportt = fcoe_vport_scsi_transport;
e9084bb8 741 else
8ca86f84 742 lport->host->transportt = fcoe_nport_scsi_transport;
7f349142
VD		 743
744 /* add the new host to the SCSI-ml */
1875f27e 745 rc = scsi_add_host(lport->host, dev);
7f349142 746 if (rc) {
1875f27e 747 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
d5488eb9 748 "error on scsi_add_host\n");
7f349142
VD		 749 return rc;
750 }
9a05753b 751
1875f27e 752 if (!lport->vport)
4be929be 753 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
9a05753b 754
1875f27e 755 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
5baa17c3 756 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
1875f27e 757 fcoe_netdev(lport)->name);
7f349142
VD		 758
759 return 0;
760}
761
6fef3902
NP		 762
763/**
764 * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE
765 * @lport: The local port that is associated with the net device
766 * @netdev: The associated net device
767 *
768 * Must be called after fcoe_shost_config() as it will use local port mutex
769 *
770 */
771static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev)
772{
773 struct fcoe_interface *fcoe;
774 struct fcoe_port *port;
775 struct net_device *realdev;
776 int rc;
777 struct netdev_fcoe_hbainfo fdmi;
778
779 port = lport_priv(lport);
780 fcoe = port->priv;
781 realdev = fcoe->realdev;
782
783 if (!realdev)
784 return;
785
786 /* No FDMI state m/c for NPIV ports */
787 if (lport->vport)
788 return;
789
790 if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) {
791 memset(&fdmi, 0, sizeof(fdmi));
792 rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev,
793 &fdmi);
794 if (rc) {
795 printk(KERN_INFO "fcoe: Failed to retrieve FDMI "
796 "information from netdev.\n");
797 return;
798 }
799
800 snprintf(fc_host_serial_number(lport->host),
801 FC_SERIAL_NUMBER_SIZE,
802 "%s",
803 fdmi.serial_number);
804 snprintf(fc_host_manufacturer(lport->host),
805 FC_SERIAL_NUMBER_SIZE,
806 "%s",
807 fdmi.manufacturer);
808 snprintf(fc_host_model(lport->host),
809 FC_SYMBOLIC_NAME_SIZE,
810 "%s",
811 fdmi.model);
812 snprintf(fc_host_model_description(lport->host),
813 FC_SYMBOLIC_NAME_SIZE,
814 "%s",
815 fdmi.model_description);
816 snprintf(fc_host_hardware_version(lport->host),
817 FC_VERSION_STRING_SIZE,
818 "%s",
819 fdmi.hardware_version);
820 snprintf(fc_host_driver_version(lport->host),
821 FC_VERSION_STRING_SIZE,
822 "%s",
823 fdmi.driver_version);
824 snprintf(fc_host_optionrom_version(lport->host),
825 FC_VERSION_STRING_SIZE,
826 "%s",
827 fdmi.optionrom_version);
828 snprintf(fc_host_firmware_version(lport->host),
829 FC_VERSION_STRING_SIZE,
830 "%s",
831 fdmi.firmware_version);
832
833 /* Enable FDMI lport states */
834 lport->fdmi_enabled = 1;
835 } else {
836 lport->fdmi_enabled = 0;
837 printk(KERN_INFO "fcoe: No FDMI support.\n");
838 }
839}
840
1875f27e
RL		 841/**
842 * fcoe_oem_match() - The match routine for the offloaded exchange manager
843 * @fp: The I/O frame
d7179680 844 *
1875f27e
RL		 845 * This routine will be associated with an exchange manager (EM). When
846 * the libfc exchange handling code is looking for an EM to use it will
847 * call this routine and pass it the frame that it wishes to send. This
848 * routine will return True if the associated EM is to be used and False
849 * if the echange code should continue looking for an EM.
850 *
851 * The offload EM that this routine is associated with will handle any
852 * packets that are for SCSI read requests.
853 *
1ff9918b
KP		 854 * This has been enhanced to work when FCoE stack is operating in target
855 * mode.
856 *
1875f27e 857 * Returns: True for read types I/O, otherwise returns false.
d7179680 858 */
7c9c6841 859static bool fcoe_oem_match(struct fc_frame *fp)
d7179680 860{
1ff9918b
KP		 861 struct fc_frame_header *fh = fc_frame_header_get(fp);
862 struct fcp_cmnd *fcp;
863
864 if (fc_fcp_is_read(fr_fsp(fp)) &&
865 (fr_fsp(fp)->data_len > fcoe_ddp_min))
866 return true;
a762dce4
YZ		 867 else if ((fr_fsp(fp) == NULL) &&
868 (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) &&
869 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) {
1ff9918b 870 fcp = fc_frame_payload_get(fp, sizeof(*fcp));
a762dce4
YZ		 871 if ((fcp->fc_flags & FCP_CFL_WRDATA) &&
872 (ntohl(fcp->fc_dl) > fcoe_ddp_min))
1ff9918b
KP		 873 return true;
874 }
875 return false;
d7179680
VD		 876}
877
7f349142 878/**
1875f27e
RL		 879 * fcoe_em_config() - Allocate and configure an exchange manager
880 * @lport: The local port that the new EM will be associated with
7f349142 881 *
1875f27e 882 * Returns: 0 on success
7f349142 883 */
1875f27e 884static inline int fcoe_em_config(struct fc_lport *lport)
7f349142 885{
1875f27e 886 struct fcoe_port *port = lport_priv(lport);
8597ae8b 887 struct fcoe_interface *fcoe = port->priv;
25024989 888 struct fcoe_interface *oldfcoe = NULL;
1d1b88dc 889 struct net_device *old_real_dev, *cur_real_dev;
d7179680
VD		 890 u16 min_xid = FCOE_MIN_XID;
891 u16 max_xid = FCOE_MAX_XID;
892
893 /*
894 * Check if need to allocate an em instance for
895 * offload exchange ids to be shared across all VN_PORTs/lport.
896 */
1875f27e
RL		 897 if (!lport->lro_enabled || !lport->lro_xid ||
898 (lport->lro_xid >= max_xid)) {
899 lport->lro_xid = 0;
d7179680
VD		 900 goto skip_oem;
901 }
902
903 /*
904 * Reuse existing offload em instance in case
1d1b88dc 905 * it is already allocated on real eth device
d7179680 906 */
25024989
CL		 907 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
908 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
1d1b88dc 909 else
25024989 910 cur_real_dev = fcoe->netdev;
1d1b88dc 911
25024989 912 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
25024989
CL		 913 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
914 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
1d1b88dc 915 else
25024989 916 old_real_dev = oldfcoe->netdev;
1d1b88dc
VD		 917
918 if (cur_real_dev == old_real_dev) {
991cbb60 919 fcoe->oem = oldfcoe->oem;
d7179680
VD		 920 break;
921 }
922 }
923
991cbb60 924 if (fcoe->oem) {
1875f27e 925 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
d7179680
VD		 926 printk(KERN_ERR "fcoe_em_config: failed to add "
927 "offload em:%p on interface:%s\n",
991cbb60 928 fcoe->oem, fcoe->netdev->name);
d7179680
VD		 929 return -ENOMEM;
930 }
931 } else {
1875f27e
RL		 932 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
933 FCOE_MIN_XID, lport->lro_xid,
934 fcoe_oem_match);
991cbb60 935 if (!fcoe->oem) {
d7179680
VD		 936 printk(KERN_ERR "fcoe_em_config: failed to allocate "
937 "em for offload exches on interface:%s\n",
25024989 938 fcoe->netdev->name);
d7179680
VD		 939 return -ENOMEM;
940 }
941 }
942
943 /*
944 * Exclude offload EM xid range from next EM xid range.
945 */
1875f27e 946 min_xid += lport->lro_xid + 1;
d7179680
VD		 947
948skip_oem:
1875f27e 949 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
d7179680 950 printk(KERN_ERR "fcoe_em_config: failed to "
25024989 951 "allocate em on interface %s\n", fcoe->netdev->name);
7f349142 952 return -ENOMEM;
d7179680 953 }
7f349142
VD		 954
955 return 0;
956}
957
958/**
1875f27e
RL		 959 * fcoe_if_destroy() - Tear down a SW FCoE instance
960 * @lport: The local port to be destroyed
34ce27bc 961 *
7f349142 962 */
af7f85d9 963static void fcoe_if_destroy(struct fc_lport *lport)
7f349142 964{
b2085a4e
NP		 965 struct fcoe_port *port = lport_priv(lport);
966 struct fcoe_interface *fcoe = port->priv;
967 struct net_device *netdev = fcoe->netdev;
968
969 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
970
971 /* Logout of the fabric */
972 fc_fabric_logoff(lport);
973
974 /* Cleanup the fc_lport */
975 fc_lport_destroy(lport);
976
977 /* Stop the transmit retry timer */
978 del_timer_sync(&port->timer);
979
980 /* Free existing transmit skbs */
981 fcoe_clean_pending_queue(lport);
982
983 rtnl_lock();
984 if (!is_zero_ether_addr(port->data_src_addr))
985 dev_uc_del(netdev, port->data_src_addr);
433eba04
VD		 986 if (lport->vport)
987 synchronize_net();
988 else
989 fcoe_interface_remove(fcoe);
b2085a4e
NP		 990 rtnl_unlock();
991
f161fb72 992 /* Free queued packets for the per-CPU receive threads */
af7f85d9 993 fcoe_percpu_clean(lport);
f161fb72 994
7f349142 995 /* Detach from the scsi-ml */
af7f85d9
CL		 996 fc_remove_host(lport->host);
997 scsi_remove_host(lport->host);
7f349142 998
80e736f8
YZ		 999 /* Destroy lport scsi_priv */
1000 fc_fcp_destroy(lport);
1001
7f349142 1002 /* There are no more rports or I/O, free the EM */
af7f85d9 1003 fc_exch_mgr_free(lport);
7f349142 1004
7f349142 1005 /* Free memory used by statistical counters */
af7f85d9 1006 fc_lport_free_stats(lport);
7f349142 1007
3cab4468
VD		 1008 /*
1009 * Release the Scsi_Host for vport but hold on to
1010 * master lport until it fcoe interface fully cleaned-up.
1011 */
1012 if (lport->vport)
1013 scsi_host_put(lport->host);
7f349142
VD		 1014}
1015
1875f27e
RL		 1016/**
1017 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
1018 * @lport: The local port to setup DDP for
1019 * @xid: The exchange ID for this DDP transfer
1020 * @sgl: The scatterlist describing this transfer
1021 * @sgc: The number of sg items
7f349142 1022 *
1875f27e 1023 * Returns: 0 if the DDP context was not configured
7f349142 1024 */
1875f27e
RL		 1025static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
1026 struct scatterlist *sgl, unsigned int sgc)
7f349142 1027{
1875f27e 1028 struct net_device *netdev = fcoe_netdev(lport);
7f349142 1029
1875f27e
RL		 1030 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
1031 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
1032 xid, sgl,
1033 sgc);
7f349142
VD		 1034
1035 return 0;
1036}
1037
71f89491
YZ		 1038/**
1039 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device
1040 * @lport: The local port to setup DDP for
1041 * @xid: The exchange ID for this DDP transfer
1042 * @sgl: The scatterlist describing this transfer
1043 * @sgc: The number of sg items
1044 *
1045 * Returns: 0 if the DDP context was not configured
1046 */
1047static int fcoe_ddp_target(struct fc_lport *lport, u16 xid,
1048 struct scatterlist *sgl, unsigned int sgc)
1049{
1050 struct net_device *netdev = fcoe_netdev(lport);
1051
1052 if (netdev->netdev_ops->ndo_fcoe_ddp_target)
1053 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid,
1054 sgl, sgc);
1055
1056 return 0;
1057}
1058
1059
1875f27e
RL		 1060/**
1061 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
1062 * @lport: The local port to complete DDP on
1063 * @xid: The exchange ID for this DDP transfer
7f349142 1064 *
1875f27e 1065 * Returns: the length of data that have been completed by DDP
7f349142 1066 */
1875f27e 1067static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
7f349142 1068{
1875f27e 1069 struct net_device *netdev = fcoe_netdev(lport);
7f349142 1070
1875f27e
RL		 1071 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
1072 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
7f349142
VD		 1073 return 0;
1074}
1075
7f349142 1076/**
1875f27e
RL		 1077 * fcoe_if_create() - Create a FCoE instance on an interface
1078 * @fcoe: The FCoE interface to create a local port on
1079 * @parent: The device pointer to be the parent in sysfs for the SCSI host
1080 * @npiv: Indicates if the port is a vport or not
7f349142 1081 *
1875f27e 1082 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
7f349142 1083 *
1875f27e 1084 * Returns: The allocated fc_lport or an error pointer
7f349142 1085 */
030f4e00 1086static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
9a05753b 1087 struct device *parent, int npiv)
7f349142 1088{
619fe4be 1089 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
1875f27e 1090 struct net_device *netdev = fcoe->netdev;
72fa396b 1091 struct fc_lport *lport, *n_port;
014f5c3f 1092 struct fcoe_port *port;
72fa396b 1093 struct Scsi_Host *shost;
1875f27e 1094 int rc;
9a05753b
CL		 1095 /*
1096 * parent is only a vport if npiv is 1,
1097 * but we'll only use vport in that case so go ahead and set it
1098 */
1099 struct fc_vport *vport = dev_to_vport(parent);
7f349142 1100
d5488eb9 1101 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
7f349142 1102
72fa396b
VD		 1103 if (!npiv)
1104 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port));
1105 else
1106 lport = libfc_vport_create(vport, sizeof(*port));
1107
86221969 1108 if (!lport) {
d5488eb9 1109 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
af7f85d9 1110 rc = -ENOMEM;
030f4e00 1111 goto out;
7f349142 1112 }
014f5c3f 1113 port = lport_priv(lport);
2e70e241 1114 port->lport = lport;
8597ae8b 1115 port->priv = fcoe;
66524ec9 1116 port->get_netdev = fcoe_netdev;
8597ae8b
BPG		 1117 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH;
1118 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH;
2e70e241 1119 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
7f349142 1120
f9184df3
NH		 1121 /*
1122 * Need to add the lport to the hostlist
1123 * so we catch NETDEV_CHANGE events.
1124 */
1125 fcoe_hostlist_add(lport);
1126
1875f27e 1127 /* configure a fc_lport including the exchange manager */
af7f85d9 1128 rc = fcoe_lport_config(lport);
7f349142 1129 if (rc) {
d5488eb9
RL		 1130 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
1131 "interface\n");
7f349142
VD		 1132 goto out_host_put;
1133 }
1134
9a05753b 1135 if (npiv) {
9f8f3aa6
CL		 1136 FCOE_NETDEV_DBG(netdev, "Setting vport names, "
1137 "%16.16llx %16.16llx\n",
1875f27e 1138 vport->node_name, vport->port_name);
9a05753b
CL		 1139 fc_set_wwnn(lport, vport->node_name);
1140 fc_set_wwpn(lport, vport->port_name);
1141 }
1142
ab6b85c1 1143 /* configure lport network properties */
af7f85d9 1144 rc = fcoe_netdev_config(lport, netdev);
ab6b85c1 1145 if (rc) {
d5488eb9
RL		 1146 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
1147 "interface\n");
54b649f8 1148 goto out_lp_destroy;
ab6b85c1 1149 }
97c8389d 1150
7f349142 1151 /* configure lport scsi host properties */
8ba00a4b 1152 rc = fcoe_shost_config(lport, parent);
7f349142 1153 if (rc) {
d5488eb9
RL		 1154 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
1155 "interface\n");
54b649f8 1156 goto out_lp_destroy;
7f349142
VD		 1157 }
1158
96316099 1159 /* Initialize the library */
619fe4be 1160 rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1);
7f349142 1161 if (rc) {
96316099 1162 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
d5488eb9 1163 "interface\n");
96316099 1164 goto out_lp_destroy;
7f349142
VD		 1165 }
1166
6fef3902
NP		 1167 /* Initialized FDMI information */
1168 fcoe_fdmi_info(lport, netdev);
1169
72fa396b
VD		 1170 /*
1171 * fcoe_em_alloc() and fcoe_hostlist_add() both
1172 * need to be atomic with respect to other changes to the
1173 * hostlist since fcoe_em_alloc() looks for an existing EM
1174 * instance on host list updated by fcoe_hostlist_add().
1175 *
1176 * This is currently handled through the fcoe_config_mutex
1177 * begin held.
1178 */
1179 if (!npiv)
9a05753b
CL		 1180 /* lport exch manager allocation */
1181 rc = fcoe_em_config(lport);
72fa396b
VD		 1182 else {
1183 shost = vport_to_shost(vport);
1184 n_port = shost_priv(shost);
1185 rc = fc_exch_mgr_list_clone(n_port, lport);
1186 }
1187
1188 if (rc) {
1189 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n");
1190 goto out_lp_destroy;
7f349142
VD		 1191 }
1192
af7f85d9 1193 return lport;
7f349142
VD		 1194
1195out_lp_destroy:
af7f85d9 1196 fc_exch_mgr_free(lport);
7f349142 1197out_host_put:
f9184df3 1198 fcoe_hostlist_del(lport);
af7f85d9
CL		 1199 scsi_host_put(lport->host);
1200out:
1201 return ERR_PTR(rc);
7f349142
VD		 1202}
1203
1204/**
1875f27e 1205 * fcoe_if_init() - Initialization routine for fcoe.ko
7f349142 1206 *
1875f27e
RL		 1207 * Attaches the SW FCoE transport to the FC transport
1208 *
1209 * Returns: 0 on success
7f349142
VD		 1210 */
1211static int __init fcoe_if_init(void)
1212{
1213 /* attach to scsi transport */
8ca86f84
YZ		 1214 fcoe_nport_scsi_transport =
1215 fc_attach_transport(&fcoe_nport_fc_functions);
1216 fcoe_vport_scsi_transport =
1217 fc_attach_transport(&fcoe_vport_fc_functions);
7f349142 1218
8ca86f84 1219 if (!fcoe_nport_scsi_transport) {
d5488eb9 1220 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
7f349142
VD		 1221 return -ENODEV;
1222 }
1223
1224 return 0;
1225}
1226
1227/**
1875f27e
RL		 1228 * fcoe_if_exit() - Tear down fcoe.ko
1229 *
1230 * Detaches the SW FCoE transport from the FC transport
7f349142 1231 *
1875f27e 1232 * Returns: 0 on success
7f349142 1233 */
7c9c6841 1234static int __exit fcoe_if_exit(void)
7f349142 1235{
8ca86f84
YZ		 1236 fc_release_transport(fcoe_nport_scsi_transport);
1237 fc_release_transport(fcoe_vport_scsi_transport);
1238 fcoe_nport_scsi_transport = NULL;
1239 fcoe_vport_scsi_transport = NULL;
7f349142
VD		 1240 return 0;
1241}
1242
8976f424 1243/**
1875f27e
RL		 1244 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
1245 * @cpu: The CPU index of the CPU to create a receive thread for
8976f424
RL		 1246 */
1247static void fcoe_percpu_thread_create(unsigned int cpu)
1248{
1249 struct fcoe_percpu_s *p;
1250 struct task_struct *thread;
1251
1252 p = &per_cpu(fcoe_percpu, cpu);
1253
5c609ff9
ED		 1254 thread = kthread_create_on_node(fcoe_percpu_receive_thread,
1255 (void *)p, cpu_to_node(cpu),
1256 "fcoethread/%d", cpu);
8976f424 1257
e7a51997 1258 if (likely(!IS_ERR(thread))) {
8976f424
RL		 1259 kthread_bind(thread, cpu);
1260 wake_up_process(thread);
1261
1262 spin_lock_bh(&p->fcoe_rx_list.lock);
1263 p->thread = thread;
1264 spin_unlock_bh(&p->fcoe_rx_list.lock);
1265 }
1266}
1267
1268/**
1875f27e
RL		 1269 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1270 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
8976f424
RL		 1271 *
1272 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1273 * current CPU's Rx thread. If the thread being destroyed is bound to
1274 * the CPU processing this context the skbs will be freed.
1275 */
1276static void fcoe_percpu_thread_destroy(unsigned int cpu)
1277{
1278 struct fcoe_percpu_s *p;
1279 struct task_struct *thread;
1280 struct page *crc_eof;
1281 struct sk_buff *skb;
1282#ifdef CONFIG_SMP
1283 struct fcoe_percpu_s *p0;
f018b73a 1284 unsigned targ_cpu = get_cpu();
8976f424
RL		 1285#endif /* CONFIG_SMP */
1286
d5488eb9 1287 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu);
8976f424
RL		 1288
1289 /* Prevent any new skbs from being queued for this CPU. */
1290 p = &per_cpu(fcoe_percpu, cpu);
1291 spin_lock_bh(&p->fcoe_rx_list.lock);
1292 thread = p->thread;
1293 p->thread = NULL;
1294 crc_eof = p->crc_eof_page;
1295 p->crc_eof_page = NULL;
1296 p->crc_eof_offset = 0;
1297 spin_unlock_bh(&p->fcoe_rx_list.lock);
1298
1299#ifdef CONFIG_SMP
1300 /*
1301 * Don't bother moving the skb's if this context is running
1302 * on the same CPU that is having its thread destroyed. This
1303 * can easily happen when the module is removed.
1304 */
1305 if (cpu != targ_cpu) {
1306 p0 = &per_cpu(fcoe_percpu, targ_cpu);
1307 spin_lock_bh(&p0->fcoe_rx_list.lock);
1308 if (p0->thread) {
d5488eb9
RL		 1309 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1310 cpu, targ_cpu);
8976f424
RL		 1311
1312 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1313 __skb_queue_tail(&p0->fcoe_rx_list, skb);
1314 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1315 } else {
1316 /*
1317 * The targeted CPU is not initialized and cannot accept
1875f27e 1318 * new skbs. Unlock the targeted CPU and drop the skbs
8976f424
RL		 1319 * on the CPU that is going offline.
1320 */
1321 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1322 kfree_skb(skb);
1323 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1324 }
1325 } else {
1326 /*
1327 * This scenario occurs when the module is being removed
1328 * and all threads are being destroyed. skbs will continue
1329 * to be shifted from the CPU thread that is being removed
1330 * to the CPU thread associated with the CPU that is processing
1331 * the module removal. Once there is only one CPU Rx thread it
1332 * will reach this case and we will drop all skbs and later
1333 * stop the thread.
1334 */
1335 spin_lock_bh(&p->fcoe_rx_list.lock);
1336 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1337 kfree_skb(skb);
1338 spin_unlock_bh(&p->fcoe_rx_list.lock);
1339 }
f018b73a 1340 put_cpu();
8976f424
RL		 1341#else
1342 /*
dd3fd72e 1343 * This a non-SMP scenario where the singular Rx thread is
8976f424
RL		 1344 * being removed. Free all skbs and stop the thread.
1345 */
1346 spin_lock_bh(&p->fcoe_rx_list.lock);
1347 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1348 kfree_skb(skb);
1349 spin_unlock_bh(&p->fcoe_rx_list.lock);
1350#endif
1351
1352 if (thread)
1353 kthread_stop(thread);
1354
1355 if (crc_eof)
1356 put_page(crc_eof);
1357}
1358
1359/**
1875f27e
RL		 1360 * fcoe_cpu_callback() - Handler for CPU hotplug events
1361 * @nfb: The callback data block
1362 * @action: The event triggering the callback
1363 * @hcpu: The index of the CPU that the event is for
8976f424 1364 *
1875f27e 1365 * This creates or destroys per-CPU data for fcoe
8976f424
RL		 1366 *
1367 * Returns NOTIFY_OK always.
1368 */
1369static int fcoe_cpu_callback(struct notifier_block *nfb,
1370 unsigned long action, void *hcpu)
1371{
1372 unsigned cpu = (unsigned long)hcpu;
1373
1374 switch (action) {
1375 case CPU_ONLINE:
1376 case CPU_ONLINE_FROZEN:
d5488eb9 1377 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu);
8976f424
RL		 1378 fcoe_percpu_thread_create(cpu);
1379 break;
1380 case CPU_DEAD:
1381 case CPU_DEAD_FROZEN:
d5488eb9 1382 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu);
8976f424
RL		 1383 fcoe_percpu_thread_destroy(cpu);
1384 break;
1385 default:
1386 break;
1387 }
1388 return NOTIFY_OK;
1389}
1390
064287ee
KP		 1391/**
1392 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming
1393 * command.
064287ee 1394 *
d272281c
VD		 1395 * This routine selects next CPU based on cpumask to distribute
1396 * incoming requests in round robin.
064287ee 1397 *
d272281c 1398 * Returns: int CPU number
064287ee 1399 */
d272281c 1400static inline unsigned int fcoe_select_cpu(void)
064287ee
KP		 1401{
1402 static unsigned int selected_cpu;
1403
d272281c
VD		 1404 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask);
1405 if (selected_cpu >= nr_cpu_ids)
1406 selected_cpu = cpumask_first(cpu_online_mask);
1407
064287ee
KP		 1408 return selected_cpu;
1409}
1410
85b4aa49 1411/**
1875f27e
RL		 1412 * fcoe_rcv() - Receive packets from a net device
1413 * @skb: The received packet
1414 * @netdev: The net device that the packet was received on
1415 * @ptype: The packet type context
1416 * @olddev: The last device net device
85b4aa49 1417 *
1875f27e
RL		 1418 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1419 * FC frame and passes the frame to libfc.
85b4aa49
RL		 1420 *
1421 * Returns: 0 for success
34f42a07 1422 */
7c9c6841 1423static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
85b4aa49
RL		 1424 struct packet_type *ptype, struct net_device *olddev)
1425{
1875f27e 1426 struct fc_lport *lport;
85b4aa49 1427 struct fcoe_rcv_info *fr;
619fe4be 1428 struct fcoe_ctlr *ctlr;
259ad85d 1429 struct fcoe_interface *fcoe;
85b4aa49 1430 struct fc_frame_header *fh;
85b4aa49 1431 struct fcoe_percpu_s *fps;
519e5135 1432 struct ethhdr *eh;
b2f0091f 1433 unsigned int cpu;
85b4aa49 1434
259ad85d 1435 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
619fe4be
RL		 1436 ctlr = fcoe_to_ctlr(fcoe);
1437 lport = ctlr->lp;
1875f27e
RL		 1438 if (unlikely(!lport)) {
1439 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure");
85b4aa49
RL		 1440 goto err2;
1441 }
1875f27e 1442 if (!lport->link_up)
97c8389d 1443 goto err2;
85b4aa49 1444
1875f27e 1445 FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p "
d5488eb9
RL		 1446 "data:%p tail:%p end:%p sum:%d dev:%s",
1447 skb->len, skb->data_len, skb->head, skb->data,
1448 skb_tail_pointer(skb), skb_end_pointer(skb),
1449 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
85b4aa49 1450
519e5135 1451 eh = eth_hdr(skb);
519e5135 1452
619fe4be
RL		 1453 if (is_fip_mode(ctlr) &&
1454 compare_ether_addr(eh->h_source, ctlr->dest_addr)) {
519e5135
VD		 1455 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
1456 eh->h_source);
85b4aa49
RL		 1457 goto err;
1458 }
1459
1460 /*
1461 * Check for minimum frame length, and make sure required FCoE
1462 * and FC headers are pulled into the linear data area.
1463 */
1464 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1875f27e 1465 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
85b4aa49
RL		 1466 goto err;
1467
1468 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1469 fh = (struct fc_frame_header *) skb_transport_header(skb);
1470
0ee31cb5
RL		 1471 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) {
1472 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n",
1473 eh->h_dest);
1474 goto err;
1475 }
1476
85b4aa49 1477 fr = fcoe_dev_from_skb(skb);
1875f27e 1478 fr->fr_dev = lport;
5e5e92df 1479
85b4aa49 1480 /*
b2f0091f
VD		 1481 * In case the incoming frame's exchange is originated from
1482 * the initiator, then received frame's exchange id is ANDed
1483 * with fc_cpu_mask bits to get the same cpu on which exchange
d272281c
VD		 1484 * was originated, otherwise select cpu using rx exchange id
1485 * or fcoe_select_cpu().
85b4aa49 1486 */
b2f0091f
VD		 1487 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1488 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
064287ee 1489 else {
d272281c
VD		 1490 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)
1491 cpu = fcoe_select_cpu();
1492 else
29bdd2bb 1493 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask;
064287ee 1494 }
324f6678
VD		 1495
1496 if (cpu >= nr_cpu_ids)
1497 goto err;
1498
8976f424 1499 fps = &per_cpu(fcoe_percpu, cpu);
94aa29f2 1500 spin_lock(&fps->fcoe_rx_list.lock);
8976f424
RL		 1501 if (unlikely(!fps->thread)) {
1502 /*
1503 * The targeted CPU is not ready, let's target
1504 * the first CPU now. For non-SMP systems this
1505 * will check the same CPU twice.
1506 */
1875f27e 1507 FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread "
d5488eb9
RL		 1508 "ready for incoming skb- using first online "
1509 "CPU.\n");
8976f424 1510
94aa29f2 1511 spin_unlock(&fps->fcoe_rx_list.lock);
6957177f 1512 cpu = cpumask_first(cpu_online_mask);
8976f424 1513 fps = &per_cpu(fcoe_percpu, cpu);
94aa29f2 1514 spin_lock(&fps->fcoe_rx_list.lock);
8976f424 1515 if (!fps->thread) {
94aa29f2 1516 spin_unlock(&fps->fcoe_rx_list.lock);
8976f424
RL		 1517 goto err;
1518 }
1519 }
1520
1521 /*
1522 * We now have a valid CPU that we're targeting for
1523 * this skb. We also have this receive thread locked,
1524 * so we're free to queue skbs into it's queue.
1525 */
85b4aa49 1526
5e70c4c4
NH		 1527 /*
1528 * Note: We used to have a set of conditions under which we would
1529 * call fcoe_recv_frame directly, rather than queuing to the rx list
1530 * as it could save a few cycles, but doing so is prohibited, as
1531 * fcoe_recv_frame has several paths that may sleep, which is forbidden
1532 * in softirq context.
859b7b64 1533 */
5e70c4c4 1534 __skb_queue_tail(&fps->fcoe_rx_list, skb);
20dc3811 1535 if (fps->thread->state == TASK_INTERRUPTIBLE)
5e70c4c4 1536 wake_up_process(fps->thread);
94aa29f2 1537 spin_unlock(&fps->fcoe_rx_list.lock);
85b4aa49
RL		 1538
1539 return 0;
1540err:
1bd49b48 1541 per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++;
f018b73a 1542 put_cpu();
85b4aa49
RL		 1543err2:
1544 kfree_skb(skb);
1545 return -1;
1546}
85b4aa49
RL		 1547
1548/**
8597ae8b 1549 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1875f27e
RL		 1550 * @skb: The packet to be transmitted
1551 * @tlen: The total length of the trailer
1552 *
85b4aa49 1553 * Returns: 0 for success
34f42a07 1554 */
8597ae8b 1555static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)
85b4aa49
RL		 1556{
1557 struct fcoe_percpu_s *fps;
8597ae8b 1558 int rc;
85b4aa49 1559
5e5e92df 1560 fps = &get_cpu_var(fcoe_percpu);
8597ae8b 1561 rc = fcoe_get_paged_crc_eof(skb, tlen, fps);
5e5e92df 1562 put_cpu_var(fcoe_percpu);
85b4aa49 1563
8597ae8b 1564 return rc;
85b4aa49 1565}
85b4aa49
RL		 1566
1567/**
1875f27e
RL		 1568 * fcoe_xmit() - Transmit a FCoE frame
1569 * @lport: The local port that the frame is to be transmitted for
1570 * @fp: The frame to be transmitted
85b4aa49 1571 *
1875f27e 1572 * Return: 0 for success
34f42a07 1573 */
7c9c6841 1574static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
85b4aa49 1575{
4bb6b515 1576 int wlen;
85b4aa49
RL		 1577 u32 crc;
1578 struct ethhdr *eh;
1579 struct fcoe_crc_eof *cp;
1580 struct sk_buff *skb;
1bd49b48 1581 struct fc_stats *stats;
85b4aa49
RL		 1582 struct fc_frame_header *fh;
1583 unsigned int hlen; /* header length implies the version */
1584 unsigned int tlen; /* trailer length */
1585 unsigned int elen; /* eth header, may include vlan */
1875f27e 1586 struct fcoe_port *port = lport_priv(lport);
8597ae8b 1587 struct fcoe_interface *fcoe = port->priv;
619fe4be 1588 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
85b4aa49
RL		 1589 u8 sof, eof;
1590 struct fcoe_hdr *hp;
1591
1592 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1593
85b4aa49 1594 fh = fc_frame_header_get(fp);
97c8389d
JE		 1595 skb = fp_skb(fp);
1596 wlen = skb->len / FCOE_WORD_TO_BYTE;
1597
1875f27e 1598 if (!lport->link_up) {
3caf02ee 1599 kfree_skb(skb);
97c8389d 1600 return 0;
85b4aa49
RL		 1601 }
1602
9860eeb4 1603 if (unlikely(fh->fh_type == FC_TYPE_ELS) &&
619fe4be 1604 fcoe_ctlr_els_send(ctlr, lport, skb))
97c8389d
JE		 1605 return 0;
1606
85b4aa49
RL		 1607 sof = fr_sof(fp);
1608 eof = fr_eof(fp);
1609
4e57e1cb 1610 elen = sizeof(struct ethhdr);
85b4aa49
RL		 1611 hlen = sizeof(struct fcoe_hdr);
1612 tlen = sizeof(struct fcoe_crc_eof);
1613 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1614
1615 /* crc offload */
1875f27e 1616 if (likely(lport->crc_offload)) {
cf64bc8f 1617 skb->ip_summed = CHECKSUM_UNNECESSARY;
85b4aa49
RL		 1618 skb->csum_start = skb_headroom(skb);
1619 skb->csum_offset = skb->len;
1620 crc = 0;
1621 } else {
1622 skb->ip_summed = CHECKSUM_NONE;
1623 crc = fcoe_fc_crc(fp);
1624 }
1625
014f5c3f 1626 /* copy port crc and eof to the skb buff */
85b4aa49
RL		 1627 if (skb_is_nonlinear(skb)) {
1628 skb_frag_t *frag;
8597ae8b 1629 if (fcoe_alloc_paged_crc_eof(skb, tlen)) {
e9041581 1630 kfree_skb(skb);
85b4aa49
RL		 1631 return -ENOMEM;
1632 }
1633 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
77dfce07 1634 cp = kmap_atomic(skb_frag_page(frag))
85b4aa49
RL		 1635 + frag->page_offset;
1636 } else {
1637 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
1638 }
1639
1640 memset(cp, 0, sizeof(*cp));
1641 cp->fcoe_eof = eof;
1642 cp->fcoe_crc32 = cpu_to_le32(~crc);
1643
1644 if (skb_is_nonlinear(skb)) {
77dfce07 1645 kunmap_atomic(cp);
85b4aa49
RL		 1646 cp = NULL;
1647 }
1648
014f5c3f 1649 /* adjust skb network/transport offsets to match mac/fcoe/port */
85b4aa49
RL		 1650 skb_push(skb, elen + hlen);
1651 skb_reset_mac_header(skb);
1652 skb_reset_network_header(skb);
1653 skb->mac_len = elen;
211c738d 1654 skb->protocol = htons(ETH_P_FCOE);
31c37a6f 1655 skb->priority = fcoe->priority;
6f6c2aa3 1656
d1483bb9 1657 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN &&
f646968f 1658 fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) {
d1483bb9
VD		 1659 skb->vlan_tci = VLAN_TAG_PRESENT |
1660 vlan_dev_vlan_id(fcoe->netdev);
1661 skb->dev = fcoe->realdev;
1662 } else
1663 skb->dev = fcoe->netdev;
85b4aa49
RL		 1664
1665 /* fill up mac and fcoe headers */
1666 eh = eth_hdr(skb);
1667 eh->h_proto = htons(ETH_P_FCOE);
619fe4be
RL		 1668 memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN);
1669 if (ctlr->map_dest)
cd229e42 1670 memcpy(eh->h_dest + 3, fh->fh_d_id, 3);
85b4aa49 1671
619fe4be
RL		 1672 if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN))
1673 memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN);
85b4aa49 1674 else
11b56188 1675 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
85b4aa49
RL		 1676
1677 hp = (struct fcoe_hdr *)(eh + 1);
1678 memset(hp, 0, sizeof(*hp));
1679 if (FC_FCOE_VER)
1680 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1681 hp->fcoe_sof = sof;
1682
39ca9a06 1683 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1875f27e 1684 if (lport->seq_offload && fr_max_payload(fp)) {
39ca9a06
YZ		 1685 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1686 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1687 } else {
1688 skb_shinfo(skb)->gso_type = 0;
1689 skb_shinfo(skb)->gso_size = 0;
1690 }
85b4aa49 1691 /* update tx stats: regardless if LLD fails */
1bd49b48 1692 stats = per_cpu_ptr(lport->stats, get_cpu());
582b45bc
RL		 1693 stats->TxFrames++;
1694 stats->TxWords += wlen;
f018b73a 1695 put_cpu();
85b4aa49
RL		 1696
1697 /* send down to lld */
1875f27e 1698 fr_dev(fp) = lport;
980f5156 1699 fcoe_port_send(port, skb);
85b4aa49
RL		 1700 return 0;
1701}
85b4aa49 1702
e7a51997 1703/**
1875f27e
RL		 1704 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1705 * @skb: The completed skb (argument required by destructor)
e7a51997
JE		 1706 */
1707static void fcoe_percpu_flush_done(struct sk_buff *skb)
1708{
1709 complete(&fcoe_flush_completion);
1710}
1711
52ee8321
VD		 1712/**
1713 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
1714 * @lport: The local port the frame was received on
1715 * @fp: The received frame
1716 *
1717 * Return: 0 on passing filtering checks
1718 */
1719static inline int fcoe_filter_frames(struct fc_lport *lport,
1720 struct fc_frame *fp)
1721{
619fe4be 1722 struct fcoe_ctlr *ctlr;
52ee8321
VD		 1723 struct fcoe_interface *fcoe;
1724 struct fc_frame_header *fh;
1725 struct sk_buff *skb = (struct sk_buff *)fp;
1bd49b48 1726 struct fc_stats *stats;
52ee8321
VD		 1727
1728 /*
1729 * We only check CRC if no offload is available and if it is
1730 * it's solicited data, in which case, the FCP layer would
1731 * check it during the copy.
1732 */
1733 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
1734 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1735 else
1736 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1737
1738 fh = (struct fc_frame_header *) skb_transport_header(skb);
1739 fh = fc_frame_header_get(fp);
1740 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP)
1741 return 0;
1742
8597ae8b 1743 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;
619fe4be
RL		 1744 ctlr = fcoe_to_ctlr(fcoe);
1745 if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
52ee8321
VD		 1746 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
1747 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1748 return -EINVAL;
1749 }
1750
f2f96d20 1751 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) ||
52ee8321
VD		 1752 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) {
1753 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1754 return 0;
1755 }
1756
1bd49b48 1757 stats = per_cpu_ptr(lport->stats, get_cpu());
52ee8321
VD		 1758 stats->InvalidCRCCount++;
1759 if (stats->InvalidCRCCount < 5)
1760 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
7e1e7ead 1761 put_cpu();
52ee8321
VD		 1762 return -EINVAL;
1763}
1764
34f42a07 1765/**
859b7b64
CL		 1766 * fcoe_recv_frame() - process a single received frame
1767 * @skb: frame to process
85b4aa49 1768 */
859b7b64 1769static void fcoe_recv_frame(struct sk_buff *skb)
85b4aa49 1770{
85b4aa49 1771 u32 fr_len;
1875f27e 1772 struct fc_lport *lport;
85b4aa49 1773 struct fcoe_rcv_info *fr;
1bd49b48 1774 struct fc_stats *stats;
85b4aa49
RL		 1775 struct fcoe_crc_eof crc_eof;
1776 struct fc_frame *fp;
014f5c3f 1777 struct fcoe_port *port;
85b4aa49
RL		 1778 struct fcoe_hdr *hp;
1779
859b7b64
CL		 1780 fr = fcoe_dev_from_skb(skb);
1781 lport = fr->fr_dev;
1782 if (unlikely(!lport)) {
1783 if (skb->destructor != fcoe_percpu_flush_done)
1784 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb");
1785 kfree_skb(skb);
1786 return;
1787 }
1788
1789 FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d "
1790 "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
1791 skb->len, skb->data_len,
1792 skb->head, skb->data, skb_tail_pointer(skb),
1793 skb_end_pointer(skb), skb->csum,
1794 skb->dev ? skb->dev->name : "<NULL>");
1795
859b7b64 1796 port = lport_priv(lport);
f1633011 1797 skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */
859b7b64
CL		 1798
1799 /*
1800 * Frame length checks and setting up the header pointers
1801 * was done in fcoe_rcv already.
1802 */
1803 hp = (struct fcoe_hdr *) skb_network_header(skb);
859b7b64 1804
1bd49b48 1805 stats = per_cpu_ptr(lport->stats, get_cpu());
859b7b64
CL		 1806 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1807 if (stats->ErrorFrames < 5)
1808 printk(KERN_WARNING "fcoe: FCoE version "
1809 "mismatch: The frame has "
1810 "version %x, but the "
1811 "initiator supports version "
1812 "%x\n", FC_FCOE_DECAPS_VER(hp),
1813 FC_FCOE_VER);
f018b73a 1814 goto drop;
859b7b64
CL		 1815 }
1816
1817 skb_pull(skb, sizeof(struct fcoe_hdr));
1818 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1819
1820 stats->RxFrames++;
1821 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1822
1823 fp = (struct fc_frame *)skb;
1824 fc_frame_init(fp);
1825 fr_dev(fp) = lport;
1826 fr_sof(fp) = hp->fcoe_sof;
1827
1828 /* Copy out the CRC and EOF trailer for access */
f018b73a
JE		 1829 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof)))
1830 goto drop;
859b7b64
CL		 1831 fr_eof(fp) = crc_eof.fcoe_eof;
1832 fr_crc(fp) = crc_eof.fcoe_crc32;
f018b73a
JE		 1833 if (pskb_trim(skb, fr_len))
1834 goto drop;
859b7b64 1835
52ee8321
VD		 1836 if (!fcoe_filter_frames(lport, fp)) {
1837 put_cpu();
1838 fc_exch_recv(lport, fp);
1839 return;
859b7b64 1840 }
f018b73a
JE		 1841drop:
1842 stats->ErrorFrames++;
1843 put_cpu();
1844 kfree_skb(skb);
859b7b64
CL		 1845}
1846
1847/**
1848 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1849 * @arg: The per-CPU context
1850 *
1851 * Return: 0 for success
1852 */
7c9c6841 1853static int fcoe_percpu_receive_thread(void *arg)
859b7b64
CL		 1854{
1855 struct fcoe_percpu_s *p = arg;
1856 struct sk_buff *skb;
20dc3811
NH		 1857 struct sk_buff_head tmp;
1858
1859 skb_queue_head_init(&tmp);
859b7b64 1860
4469c195 1861 set_user_nice(current, -20);
85b4aa49 1862
95fdd5e9 1863retry:
85b4aa49
RL		 1864 while (!kthread_should_stop()) {
1865
1866 spin_lock_bh(&p->fcoe_rx_list.lock);
20dc3811 1867 skb_queue_splice_init(&p->fcoe_rx_list, &tmp);
20dc3811 1868
95fdd5e9 1869 if (!skb_queue_len(&tmp)) {
85b4aa49
RL		 1870 set_current_state(TASK_INTERRUPTIBLE);
1871 spin_unlock_bh(&p->fcoe_rx_list.lock);
1872 schedule();
1873 set_current_state(TASK_RUNNING);
95fdd5e9
NH		 1874 goto retry;
1875 }
1876
1877 spin_unlock_bh(&p->fcoe_rx_list.lock);
1878
1879 while ((skb = __skb_dequeue(&tmp)) != NULL)
1880 fcoe_recv_frame(skb);
1881
85b4aa49
RL		 1882 }
1883 return 0;
1884}
1885
85b4aa49 1886/**
1875f27e 1887 * fcoe_dev_setup() - Setup the link change notification interface
34f42a07 1888 */
b0d428ad 1889static void fcoe_dev_setup(void)
85b4aa49 1890{
6f6c2aa3 1891 register_dcbevent_notifier(&dcb_notifier);
85b4aa49
RL		 1892 register_netdevice_notifier(&fcoe_notifier);
1893}
1894
1895/**
1875f27e 1896 * fcoe_dev_cleanup() - Cleanup the link change notification interface
34f42a07 1897 */
85b4aa49
RL		 1898static void fcoe_dev_cleanup(void)
1899{
6f6c2aa3 1900 unregister_dcbevent_notifier(&dcb_notifier);
85b4aa49
RL		 1901 unregister_netdevice_notifier(&fcoe_notifier);
1902}
1903
6f6c2aa3 1904static struct fcoe_interface *
1905fcoe_hostlist_lookup_realdev_port(struct net_device *netdev)
1906{
1907 struct fcoe_interface *fcoe;
1908 struct net_device *real_dev;
1909
1910 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1911 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
1912 real_dev = vlan_dev_real_dev(fcoe->netdev);
1913 else
1914 real_dev = fcoe->netdev;
1915
1916 if (netdev == real_dev)
1917 return fcoe;
1918 }
1919 return NULL;
1920}
1921
1922static int fcoe_dcb_app_notification(struct notifier_block *notifier,
1923 ulong event, void *ptr)
1924{
1925 struct dcb_app_type *entry = ptr;
619fe4be 1926 struct fcoe_ctlr *ctlr;
6f6c2aa3 1927 struct fcoe_interface *fcoe;
1928 struct net_device *netdev;
6f6c2aa3 1929 int prio;
1930
1931 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE)
1932 return NOTIFY_OK;
1933
1934 netdev = dev_get_by_index(&init_net, entry->ifindex);
1935 if (!netdev)
1936 return NOTIFY_OK;
1937
1938 fcoe = fcoe_hostlist_lookup_realdev_port(netdev);
1939 dev_put(netdev);
1940 if (!fcoe)
1941 return NOTIFY_OK;
1942
619fe4be
RL		 1943 ctlr = fcoe_to_ctlr(fcoe);
1944
6f6c2aa3 1945 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE)
1946 prio = ffs(entry->app.priority) - 1;
1947 else
1948 prio = entry->app.priority;
1949
1950 if (prio < 0)
1951 return NOTIFY_OK;
1952
1953 if (entry->app.protocol == ETH_P_FIP ||
1954 entry->app.protocol == ETH_P_FCOE)
619fe4be 1955 ctlr->priority = prio;
6f6c2aa3 1956
31c37a6f
NP		 1957 if (entry->app.protocol == ETH_P_FCOE)
1958 fcoe->priority = prio;
6f6c2aa3 1959
1960 return NOTIFY_OK;
1961}
1962
85b4aa49 1963/**
1875f27e
RL		 1964 * fcoe_device_notification() - Handler for net device events
1965 * @notifier: The context of the notification
1966 * @event: The type of event
1967 * @ptr: The net device that the event was on
85b4aa49 1968 *
1875f27e 1969 * This function is called by the Ethernet driver in case of link change event.
85b4aa49
RL		 1970 *
1971 * Returns: 0 for success
34f42a07 1972 */
85b4aa49
RL		 1973static int fcoe_device_notification(struct notifier_block *notifier,
1974 ulong event, void *ptr)
1975{
435c8667 1976 struct fcoe_ctlr_device *cdev;
1875f27e 1977 struct fc_lport *lport = NULL;
1d1b88dc 1978 struct net_device *netdev = ptr;
619fe4be 1979 struct fcoe_ctlr *ctlr;
014f5c3f 1980 struct fcoe_interface *fcoe;
2e70e241 1981 struct fcoe_port *port;
1bd49b48 1982 struct fc_stats *stats;
97c8389d 1983 u32 link_possible = 1;
85b4aa49
RL		 1984 u32 mfs;
1985 int rc = NOTIFY_OK;
1986
014f5c3f 1987 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
25024989 1988 if (fcoe->netdev == netdev) {
619fe4be
RL		 1989 ctlr = fcoe_to_ctlr(fcoe);
1990 lport = ctlr->lp;
85b4aa49
RL		 1991 break;
1992 }
1993 }
1875f27e 1994 if (!lport) {
85b4aa49
RL		 1995 rc = NOTIFY_DONE;
1996 goto out;
1997 }
1998
85b4aa49
RL		 1999 switch (event) {
2000 case NETDEV_DOWN:
2001 case NETDEV_GOING_DOWN:
97c8389d 2002 link_possible = 0;
85b4aa49
RL		 2003 break;
2004 case NETDEV_UP:
2005 case NETDEV_CHANGE:
85b4aa49
RL		 2006 break;
2007 case NETDEV_CHANGEMTU:
7221d7e5
YZ		 2008 if (netdev->features & NETIF_F_FCOE_MTU)
2009 break;
1d1b88dc
VD		 2010 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
2011 sizeof(struct fcoe_crc_eof));
85b4aa49 2012 if (mfs >= FC_MIN_MAX_FRAME)
1875f27e 2013 fc_set_mfs(lport, mfs);
85b4aa49
RL		 2014 break;
2015 case NETDEV_REGISTER:
2016 break;
2e70e241
CL		 2017 case NETDEV_UNREGISTER:
2018 list_del(&fcoe->list);
619fe4be 2019 port = lport_priv(ctlr->lp);
2ca32b48 2020 queue_work(fcoe_wq, &port->destroy_work);
2e70e241
CL		 2021 goto out;
2022 break;
54a5b21d
YZ		 2023 case NETDEV_FEAT_CHANGE:
2024 fcoe_netdev_features_change(lport, netdev);
2025 break;
85b4aa49 2026 default:
1d1b88dc 2027 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
d5488eb9 2028 "from netdev netlink\n", event);
85b4aa49 2029 }
5e4f8fe7
RL		 2030
2031 fcoe_link_speed_update(lport);
2032
435c8667
RL		 2033 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2034
2035 if (link_possible && !fcoe_link_ok(lport)) {
2036 switch (cdev->enabled) {
2037 case FCOE_CTLR_DISABLED:
2038 pr_info("Link up while interface is disabled.\n");
2039 break;
2040 case FCOE_CTLR_ENABLED:
2041 case FCOE_CTLR_UNUSED:
2042 fcoe_ctlr_link_up(ctlr);
2043 };
2044 } else if (fcoe_ctlr_link_down(ctlr)) {
2045 switch (cdev->enabled) {
2046 case FCOE_CTLR_DISABLED:
2047 pr_info("Link down while interface is disabled.\n");
2048 break;
2049 case FCOE_CTLR_ENABLED:
2050 case FCOE_CTLR_UNUSED:
2051 stats = per_cpu_ptr(lport->stats, get_cpu());
2052 stats->LinkFailureCount++;
2053 put_cpu();
2054 fcoe_clean_pending_queue(lport);
2055 };
85b4aa49
RL		 2056 }
2057out:
2058 return rc;
2059}
2060
55a66d3c
VD		 2061/**
2062 * fcoe_disable() - Disables a FCoE interface
78a58246 2063 * @netdev : The net_device object the Ethernet interface to create on
55a66d3c 2064 *
78a58246 2065 * Called from fcoe transport.
55a66d3c
VD		 2066 *
2067 * Returns: 0 for success
435c8667
RL		 2068 *
2069 * Deprecated: use fcoe_ctlr_enabled()
55a66d3c 2070 */
78a58246 2071static int fcoe_disable(struct net_device *netdev)
55a66d3c 2072{
619fe4be 2073 struct fcoe_ctlr *ctlr;
55a66d3c 2074 struct fcoe_interface *fcoe;
55a66d3c
VD		 2075 int rc = 0;
2076
2077 mutex_lock(&fcoe_config_mutex);
55a66d3c 2078
ee5df628 2079 rtnl_lock();
55a66d3c
VD		 2080 fcoe = fcoe_hostlist_lookup_port(netdev);
2081 rtnl_unlock();
2082
9ee50e48 2083 if (fcoe) {
619fe4be
RL		 2084 ctlr = fcoe_to_ctlr(fcoe);
2085 fcoe_ctlr_link_down(ctlr);
2086 fcoe_clean_pending_queue(ctlr->lp);
9ee50e48 2087 } else
55a66d3c
VD		 2088 rc = -ENODEV;
2089
55a66d3c
VD		 2090 mutex_unlock(&fcoe_config_mutex);
2091 return rc;
2092}
2093
2094/**
2095 * fcoe_enable() - Enables a FCoE interface
78a58246 2096 * @netdev : The net_device object the Ethernet interface to create on
55a66d3c 2097 *
78a58246 2098 * Called from fcoe transport.
55a66d3c
VD		 2099 *
2100 * Returns: 0 for success
2101 */
78a58246 2102static int fcoe_enable(struct net_device *netdev)
55a66d3c 2103{
619fe4be 2104 struct fcoe_ctlr *ctlr;
55a66d3c 2105 struct fcoe_interface *fcoe;
55a66d3c
VD		 2106 int rc = 0;
2107
2108 mutex_lock(&fcoe_config_mutex);
ee5df628 2109 rtnl_lock();
55a66d3c
VD		 2110 fcoe = fcoe_hostlist_lookup_port(netdev);
2111 rtnl_unlock();
2112
619fe4be 2113 if (!fcoe) {
55a66d3c 2114 rc = -ENODEV;
619fe4be
RL		 2115 goto out;
2116 }
55a66d3c 2117
619fe4be
RL		 2118 ctlr = fcoe_to_ctlr(fcoe);
2119
2120 if (!fcoe_link_ok(ctlr->lp))
2121 fcoe_ctlr_link_up(ctlr);
2122
2123out:
55a66d3c
VD		 2124 mutex_unlock(&fcoe_config_mutex);
2125 return rc;
2126}
2127
435c8667
RL		 2128/**
2129 * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller
2130 * @cdev: The FCoE Controller that is being enabled or disabled
2131 *
2132 * fcoe_sysfs will ensure that the state of 'enabled' has
2133 * changed, so no checking is necessary here. This routine simply
2134 * calls fcoe_enable or fcoe_disable, both of which are deprecated.
2135 * When those routines are removed the functionality can be merged
2136 * here.
2137 */
2138static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev)
2139{
2140 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev);
2141 struct fc_lport *lport = ctlr->lp;
2142 struct net_device *netdev = fcoe_netdev(lport);
2143
2144 switch (cdev->enabled) {
2145 case FCOE_CTLR_ENABLED:
2146 return fcoe_enable(netdev);
2147 case FCOE_CTLR_DISABLED:
2148 return fcoe_disable(netdev);
2149 case FCOE_CTLR_UNUSED:
2150 default:
2151 return -ENOTSUPP;
2152 };
2153}
2154
85b4aa49 2155/**
1875f27e 2156 * fcoe_destroy() - Destroy a FCoE interface
78a58246 2157 * @netdev : The net_device object the Ethernet interface to create on
1875f27e 2158 *
78a58246 2159 * Called from fcoe transport
85b4aa49
RL		 2160 *
2161 * Returns: 0 for success
34f42a07 2162 */
78a58246 2163static int fcoe_destroy(struct net_device *netdev)
85b4aa49 2164{
619fe4be 2165 struct fcoe_ctlr *ctlr;
030f4e00 2166 struct fcoe_interface *fcoe;
f04ca1b6 2167 struct fc_lport *lport;
b2085a4e 2168 struct fcoe_port *port;
8eca355f 2169 int rc = 0;
85b4aa49 2170
dfc1d0fe 2171 mutex_lock(&fcoe_config_mutex);
ee5df628 2172 rtnl_lock();
2e70e241
CL		 2173 fcoe = fcoe_hostlist_lookup_port(netdev);
2174 if (!fcoe) {
85b4aa49 2175 rc = -ENODEV;
78a58246 2176 goto out_nodev;
85b4aa49 2177 }
619fe4be
RL		 2178 ctlr = fcoe_to_ctlr(fcoe);
2179 lport = ctlr->lp;
b2085a4e 2180 port = lport_priv(lport);
54a5b21d 2181 list_del(&fcoe->list);
b2085a4e 2182 queue_work(fcoe_wq, &port->destroy_work);
85b4aa49 2183out_nodev:
b2085a4e 2184 rtnl_unlock();
dfc1d0fe 2185 mutex_unlock(&fcoe_config_mutex);
85b4aa49
RL		 2186 return rc;
2187}
2188
1875f27e
RL		 2189/**
2190 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
2191 * @work: Handle to the FCoE port to be destroyed
2192 */
2e70e241
CL		 2193static void fcoe_destroy_work(struct work_struct *work)
2194{
f9c4358e
RL		 2195 struct fcoe_ctlr_device *cdev;
2196 struct fcoe_ctlr *ctlr;
2e70e241 2197 struct fcoe_port *port;
b2085a4e 2198 struct fcoe_interface *fcoe;
94aa743a
NP		 2199 struct Scsi_Host *shost;
2200 struct fc_host_attrs *fc_host;
2201 unsigned long flags;
2202 struct fc_vport *vport;
2203 struct fc_vport *next_vport;
2e70e241
CL		 2204
2205 port = container_of(work, struct fcoe_port, destroy_work);
94aa743a
NP		 2206 shost = port->lport->host;
2207 fc_host = shost_to_fc_host(shost);
2208
2209 /* Loop through all the vports and mark them for deletion */
2210 spin_lock_irqsave(shost->host_lock, flags);
2211 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
2212 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
2213 continue;
2214 } else {
2215 vport->flags |= FC_VPORT_DELETING;
2216 queue_work(fc_host_work_q(shost),
2217 &vport->vport_delete_work);
2218 }
2219 }
2220 spin_unlock_irqrestore(shost->host_lock, flags);
2221
2222 flush_workqueue(fc_host_work_q(shost));
2223
2e70e241 2224 mutex_lock(&fcoe_config_mutex);
b2085a4e 2225
b2085a4e 2226 fcoe = port->priv;
f9c4358e
RL		 2227 ctlr = fcoe_to_ctlr(fcoe);
2228 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2229
2e70e241 2230 fcoe_if_destroy(port->lport);
ccefd23e 2231 fcoe_interface_cleanup(fcoe);
b2085a4e 2232
2e70e241 2233 mutex_unlock(&fcoe_config_mutex);
f9c4358e
RL		 2234
2235 fcoe_ctlr_device_delete(cdev);
2e70e241
CL		 2236}
2237
78a58246
YZ		 2238/**
2239 * fcoe_match() - Check if the FCoE is supported on the given netdevice
2240 * @netdev : The net_device object the Ethernet interface to create on
2241 *
2242 * Called from fcoe transport.
2243 *
2244 * Returns: always returns true as this is the default FCoE transport,
2245 * i.e., support all netdevs.
2246 */
2247static bool fcoe_match(struct net_device *netdev)
2248{
2249 return true;
2250}
2251
6f6c2aa3 2252/**
2253 * fcoe_dcb_create() - Initialize DCB attributes and hooks
2254 * @netdev: The net_device object of the L2 link that should be queried
2255 * @port: The fcoe_port to bind FCoE APP priority with
2256 * @
2257 */
2258static void fcoe_dcb_create(struct fcoe_interface *fcoe)
2259{
2260#ifdef CONFIG_DCB
2261 int dcbx;
2262 u8 fup, up;
2263 struct net_device *netdev = fcoe->realdev;
619fe4be 2264 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
6f6c2aa3 2265 struct dcb_app app = {
2266 .priority = 0,
2267 .protocol = ETH_P_FCOE
2268 };
2269
2270 /* setup DCB priority attributes. */
2271 if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) {
2272 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
2273
2274 if (dcbx & DCB_CAP_DCBX_VER_IEEE) {
2275 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
2276 up = dcb_ieee_getapp_mask(netdev, &app);
2277 app.protocol = ETH_P_FIP;
2278 fup = dcb_ieee_getapp_mask(netdev, &app);
2279 } else {
2280 app.selector = DCB_APP_IDTYPE_ETHTYPE;
2281 up = dcb_getapp(netdev, &app);
2282 app.protocol = ETH_P_FIP;
2283 fup = dcb_getapp(netdev, &app);
2284 }
2285
31c37a6f
NP		 2286 fcoe->priority = ffs(up) ? ffs(up) - 1 : 0;
2287 ctlr->priority = ffs(fup) ? ffs(fup) - 1 : fcoe->priority;
6f6c2aa3 2288 }
2289#endif
2290}
2291
435c8667
RL		 2292enum fcoe_create_link_state {
2293 FCOE_CREATE_LINK_DOWN,
2294 FCOE_CREATE_LINK_UP,
2295};
2296
85b4aa49 2297/**
435c8667
RL		 2298 * _fcoe_create() - (internal) Create a fcoe interface
2299 * @netdev : The net_device object the Ethernet interface to create on
2300 * @fip_mode: The FIP mode for this creation
2301 * @link_state: The ctlr link state on creation
1875f27e 2302 *
435c8667
RL		 2303 * Called from either the libfcoe 'create' module parameter
2304 * via fcoe_create or from fcoe_syfs's ctlr_create file.
85b4aa49 2305 *
435c8667
RL		 2306 * libfcoe's 'create' module parameter is deprecated so some
2307 * consolidation of code can be done when that interface is
2308 * removed.
34f42a07 2309 */
435c8667
RL		 2310static int _fcoe_create(struct net_device *netdev, enum fip_state fip_mode,
2311 enum fcoe_create_link_state link_state)
85b4aa49 2312{
b2085a4e 2313 int rc = 0;
8d55e507 2314 struct fcoe_ctlr_device *ctlr_dev;
619fe4be 2315 struct fcoe_ctlr *ctlr;
030f4e00 2316 struct fcoe_interface *fcoe;
af7f85d9 2317 struct fc_lport *lport;
85b4aa49 2318
dfc1d0fe 2319 mutex_lock(&fcoe_config_mutex);
ee5df628 2320 rtnl_lock();
34ce27bc 2321
85b4aa49
RL		 2322 /* look for existing lport */
2323 if (fcoe_hostlist_lookup(netdev)) {
2324 rc = -EEXIST;
78a58246 2325 goto out_nodev;
85b4aa49 2326 }
85b4aa49 2327
1dd454d9 2328 fcoe = fcoe_interface_create(netdev, fip_mode);
7287fb91
RL		 2329 if (IS_ERR(fcoe)) {
2330 rc = PTR_ERR(fcoe);
78a58246 2331 goto out_nodev;
030f4e00
CL		 2332 }
2333
619fe4be 2334 ctlr = fcoe_to_ctlr(fcoe);
8d55e507
RL		 2335 ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr);
2336 lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0);
af7f85d9 2337 if (IS_ERR(lport)) {
d5488eb9 2338 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
85b4aa49 2339 netdev->name);
85b4aa49 2340 rc = -EIO;
848e7d5b 2341 rtnl_unlock();
2e70e241 2342 fcoe_interface_cleanup(fcoe);
f9c4358e
RL		 2343 mutex_unlock(&fcoe_config_mutex);
2344 fcoe_ctlr_device_delete(ctlr_dev);
2345 goto out;
85b4aa49 2346 }
030f4e00 2347
54b649f8 2348 /* Make this the "master" N_Port */
619fe4be 2349 ctlr->lp = lport;
54b649f8 2350
6f6c2aa3 2351 /* setup DCB priority attributes. */
2352 fcoe_dcb_create(fcoe);
2353
54b649f8
CL		 2354 /* start FIP Discovery and FLOGI */
2355 lport->boot_time = jiffies;
2356 fc_fabric_login(lport);
435c8667
RL		 2357
2358 /*
2359 * If the fcoe_ctlr_device is to be set to DISABLED
2360 * it must be done after the lport is added to the
2361 * hostlist, but before the rtnl_lock is released.
2362 * This is because the rtnl_lock protects the
2363 * hostlist that fcoe_device_notification uses. If
2364 * the FCoE Controller is intended to be created
2365 * DISABLED then 'enabled' needs to be considered
2366 * handling link events. 'enabled' must be set
2367 * before the lport can be found in the hostlist
2368 * when a link up event is received.
2369 */
2370 if (link_state == FCOE_CREATE_LINK_UP)
2371 ctlr_dev->enabled = FCOE_CTLR_ENABLED;
2372 else
2373 ctlr_dev->enabled = FCOE_CTLR_DISABLED;
2374
2375 if (link_state == FCOE_CREATE_LINK_UP &&
2376 !fcoe_link_ok(lport)) {
22805123 2377 rtnl_unlock();
619fe4be 2378 fcoe_ctlr_link_up(ctlr);
22805123
RL		 2379 mutex_unlock(&fcoe_config_mutex);
2380 return rc;
2381 }
030f4e00 2382
85b4aa49 2383out_nodev:
34ce27bc 2384 rtnl_unlock();
dfc1d0fe 2385 mutex_unlock(&fcoe_config_mutex);
f9c4358e 2386out:
85b4aa49
RL		 2387 return rc;
2388}
2389
435c8667
RL		 2390/**
2391 * fcoe_create() - Create a fcoe interface
2392 * @netdev : The net_device object the Ethernet interface to create on
2393 * @fip_mode: The FIP mode for this creation
2394 *
2395 * Called from fcoe transport
2396 *
2397 * Returns: 0 for success
2398 */
2399static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode)
2400{
2401 return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP);
2402}
2403
2404/**
2405 * fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs
2406 * @netdev: The net_device to be used by the allocated FCoE Controller
2407 *
2408 * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr
2409 * in a link_down state. The allows the user an opportunity to configure
2410 * the FCoE Controller from sysfs before enabling the FCoE Controller.
2411 *
2412 * Creating in with this routine starts the FCoE Controller in Fabric
2413 * mode. The user can change to VN2VN or another mode before enabling.
2414 */
2415static int fcoe_ctlr_alloc(struct net_device *netdev)
2416{
2417 return _fcoe_create(netdev, FIP_MODE_FABRIC,
2418 FCOE_CREATE_LINK_DOWN);
2419}
2420
5e4f8fe7
RL		 2421/**
2422 * fcoe_link_ok() - Check if the link is OK for a local port
2423 * @lport: The local port to check link on
2424 *
2425 * Returns: 0 if link is UP and OK, -1 if not
2426 *
2427 */
7c9c6841 2428static int fcoe_link_ok(struct fc_lport *lport)
5e4f8fe7 2429{
8597ae8b 2430 struct net_device *netdev = fcoe_netdev(lport);
5e4f8fe7
RL		 2431
2432 if (netif_oper_up(netdev))
2433 return 0;
2434 return -1;
2435}
2436
34f42a07 2437/**
1875f27e
RL		 2438 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2439 * @lport: The local port whose skbs are to be cleared
e7a51997
JE		 2440 *
2441 * Must be called with fcoe_create_mutex held to single-thread completion.
2442 *
2443 * This flushes the pending skbs by adding a new skb to each queue and
2444 * waiting until they are all freed. This assures us that not only are
2445 * there no packets that will be handled by the lport, but also that any
2446 * threads already handling packet have returned.
85b4aa49 2447 */
7c9c6841 2448static void fcoe_percpu_clean(struct fc_lport *lport)
85b4aa49 2449{
85b4aa49 2450 struct fcoe_percpu_s *pp;
dd060e74 2451 struct sk_buff *skb;
5e5e92df 2452 unsigned int cpu;
85b4aa49 2453
5e5e92df
RL		 2454 for_each_possible_cpu(cpu) {
2455 pp = &per_cpu(fcoe_percpu, cpu);
e7a51997 2456
dd060e74 2457 if (!pp->thread || !cpu_online(cpu))
e7a51997 2458 continue;
e7a51997
JE		 2459
2460 skb = dev_alloc_skb(0);
b3b8abd8 2461 if (!skb)
e7a51997 2462 continue;
b3b8abd8 2463
e7a51997
JE		 2464 skb->destructor = fcoe_percpu_flush_done;
2465
dd060e74 2466 spin_lock_bh(&pp->fcoe_rx_list.lock);
e7a51997
JE		 2467 __skb_queue_tail(&pp->fcoe_rx_list, skb);
2468 if (pp->fcoe_rx_list.qlen == 1)
2469 wake_up_process(pp->thread);
5e5e92df 2470 spin_unlock_bh(&pp->fcoe_rx_list.lock);
e7a51997
JE		 2471
2472 wait_for_completion(&fcoe_flush_completion);
85b4aa49
RL		 2473 }
2474}
85b4aa49 2475
34f42a07 2476/**
1875f27e
RL		 2477 * fcoe_reset() - Reset a local port
2478 * @shost: The SCSI host associated with the local port to be reset
85b4aa49 2479 *
1875f27e 2480 * Returns: Always 0 (return value required by FC transport template)
85b4aa49 2481 */
7c9c6841 2482static int fcoe_reset(struct Scsi_Host *shost)
85b4aa49
RL		 2483{
2484 struct fc_lport *lport = shost_priv(shost);
d2f80952
VD		 2485 struct fcoe_port *port = lport_priv(lport);
2486 struct fcoe_interface *fcoe = port->priv;
619fe4be 2487 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
435c8667 2488 struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
d2f80952 2489
619fe4be
RL		 2490 fcoe_ctlr_link_down(ctlr);
2491 fcoe_clean_pending_queue(ctlr->lp);
435c8667
RL		 2492
2493 if (cdev->enabled != FCOE_CTLR_DISABLED &&
2494 !fcoe_link_ok(ctlr->lp))
619fe4be 2495 fcoe_ctlr_link_up(ctlr);
85b4aa49
RL		 2496 return 0;
2497}
85b4aa49 2498
34f42a07 2499/**
1875f27e
RL		 2500 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2501 * @netdev: The net device used as a key
85b4aa49 2502 *
1875f27e
RL		 2503 * Locking: Must be called with the RNL mutex held.
2504 *
2505 * Returns: NULL or the FCoE interface
85b4aa49 2506 */
014f5c3f 2507static struct fcoe_interface *
1875f27e 2508fcoe_hostlist_lookup_port(const struct net_device *netdev)
85b4aa49 2509{
014f5c3f 2510 struct fcoe_interface *fcoe;
85b4aa49 2511
014f5c3f 2512 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1875f27e 2513 if (fcoe->netdev == netdev)
014f5c3f 2514 return fcoe;
85b4aa49 2515 }
85b4aa49
RL		 2516 return NULL;
2517}
2518
34f42a07 2519/**
1875f27e
RL		 2520 * fcoe_hostlist_lookup() - Find the local port associated with a
2521 * given net device
2522 * @netdev: The netdevice used as a key
85b4aa49 2523 *
1875f27e
RL		 2524 * Locking: Must be called with the RTNL mutex held
2525 *
2526 * Returns: NULL or the local port
85b4aa49 2527 */
090eb6c4 2528static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
85b4aa49 2529{
619fe4be 2530 struct fcoe_ctlr *ctlr;
014f5c3f 2531 struct fcoe_interface *fcoe;
85b4aa49 2532
014f5c3f 2533 fcoe = fcoe_hostlist_lookup_port(netdev);
619fe4be
RL		 2534 ctlr = fcoe_to_ctlr(fcoe);
2535 return (fcoe) ? ctlr->lp : NULL;
85b4aa49 2536}
85b4aa49 2537
34f42a07 2538/**
1875f27e
RL		 2539 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2540 * port to the hostlist
2541 * @lport: The local port that identifies the FCoE interface to be added
85b4aa49 2542 *
090eb6c4 2543 * Locking: must be called with the RTNL mutex held
1875f27e
RL		 2544 *
2545 * Returns: 0 for success
85b4aa49 2546 */
090eb6c4 2547static int fcoe_hostlist_add(const struct fc_lport *lport)
85b4aa49 2548{
014f5c3f
CL		 2549 struct fcoe_interface *fcoe;
2550 struct fcoe_port *port;
2551
2552 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2553 if (!fcoe) {
2554 port = lport_priv(lport);
8597ae8b 2555 fcoe = port->priv;
014f5c3f 2556 list_add_tail(&fcoe->list, &fcoe_hostlist);
85b4aa49
RL		 2557 }
2558 return 0;
2559}
85b4aa49 2560
f9184df3
NH		 2561/**
2562 * fcoe_hostlist_del() - Remove the FCoE interface identified by a local
2563 * port to the hostlist
2564 * @lport: The local port that identifies the FCoE interface to be added
2565 *
2566 * Locking: must be called with the RTNL mutex held
2567 *
2568 */
2569static void fcoe_hostlist_del(const struct fc_lport *lport)
2570{
2571 struct fcoe_interface *fcoe;
2572 struct fcoe_port *port;
2573
2574 port = lport_priv(lport);
2575 fcoe = port->priv;
2576 list_del(&fcoe->list);
2577 return;
2578}
78a58246
YZ		 2579
2580static struct fcoe_transport fcoe_sw_transport = {
2581 .name = {FCOE_TRANSPORT_DEFAULT},
2582 .attached = false,
2583 .list = LIST_HEAD_INIT(fcoe_sw_transport.list),
2584 .match = fcoe_match,
435c8667 2585 .alloc = fcoe_ctlr_alloc,
78a58246
YZ		 2586 .create = fcoe_create,
2587 .destroy = fcoe_destroy,
2588 .enable = fcoe_enable,
2589 .disable = fcoe_disable,
2590};
2591
85b4aa49 2592/**
1875f27e 2593 * fcoe_init() - Initialize fcoe.ko
85b4aa49 2594 *
1875f27e 2595 * Returns: 0 on success, or a negative value on failure
34f42a07 2596 */
85b4aa49
RL		 2597static int __init fcoe_init(void)
2598{
1875f27e 2599 struct fcoe_percpu_s *p;
38eccabd 2600 unsigned int cpu;
8976f424 2601 int rc = 0;
85b4aa49 2602
2ca32b48
TH		 2603 fcoe_wq = alloc_workqueue("fcoe", 0, 0);
2604 if (!fcoe_wq)
2605 return -ENOMEM;
2606
78a58246
YZ		 2607 /* register as a fcoe transport */
2608 rc = fcoe_transport_attach(&fcoe_sw_transport);
2609 if (rc) {
2610 printk(KERN_ERR "failed to register an fcoe transport, check "
2611 "if libfcoe is loaded\n");
2612 return rc;
2613 }
2614
dfc1d0fe
CL		 2615 mutex_lock(&fcoe_config_mutex);
2616
38eccabd 2617 for_each_possible_cpu(cpu) {
5e5e92df 2618 p = &per_cpu(fcoe_percpu, cpu);
38eccabd
RL		 2619 skb_queue_head_init(&p->fcoe_rx_list);
2620 }
2621
8976f424
RL		 2622 for_each_online_cpu(cpu)
2623 fcoe_percpu_thread_create(cpu);
85b4aa49 2624
8976f424
RL		 2625 /* Initialize per CPU interrupt thread */
2626 rc = register_hotcpu_notifier(&fcoe_cpu_notifier);
2627 if (rc)
2628 goto out_free;
85b4aa49 2629
8976f424 2630 /* Setup link change notification */
85b4aa49
RL		 2631 fcoe_dev_setup();
2632
5892c32f
CL		 2633 rc = fcoe_if_init();
2634 if (rc)
2635 goto out_free;
85b4aa49 2636
dfc1d0fe 2637 mutex_unlock(&fcoe_config_mutex);
85b4aa49 2638 return 0;
8976f424
RL		 2639
2640out_free:
2641 for_each_online_cpu(cpu) {
2642 fcoe_percpu_thread_destroy(cpu);
2643 }
dfc1d0fe 2644 mutex_unlock(&fcoe_config_mutex);
2ca32b48 2645 destroy_workqueue(fcoe_wq);
8976f424 2646 return rc;
85b4aa49
RL		 2647}
2648module_init(fcoe_init);
2649
2650/**
1875f27e 2651 * fcoe_exit() - Clean up fcoe.ko
85b4aa49 2652 *
1875f27e 2653 * Returns: 0 on success or a negative value on failure
34f42a07 2654 */
85b4aa49
RL		 2655static void __exit fcoe_exit(void)
2656{
014f5c3f 2657 struct fcoe_interface *fcoe, *tmp;
619fe4be 2658 struct fcoe_ctlr *ctlr;
2e70e241 2659 struct fcoe_port *port;
1875f27e 2660 unsigned int cpu;
85b4aa49 2661
dfc1d0fe
CL		 2662 mutex_lock(&fcoe_config_mutex);
2663
85b4aa49
RL		 2664 fcoe_dev_cleanup();
2665
5919a595 2666 /* releases the associated fcoe hosts */
090eb6c4
CL		 2667 rtnl_lock();
2668 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
619fe4be
RL		 2669 ctlr = fcoe_to_ctlr(fcoe);
2670 port = lport_priv(ctlr->lp);
f9184df3 2671 fcoe_hostlist_del(port->lport);
2ca32b48 2672 queue_work(fcoe_wq, &port->destroy_work);
c863df33 2673 }
090eb6c4 2674 rtnl_unlock();
85b4aa49 2675
8976f424
RL		 2676 unregister_hotcpu_notifier(&fcoe_cpu_notifier);
2677
014f5c3f 2678 for_each_online_cpu(cpu)
8976f424 2679 fcoe_percpu_thread_destroy(cpu);
85b4aa49 2680
dfc1d0fe 2681 mutex_unlock(&fcoe_config_mutex);
2e70e241 2682
2ca32b48
TH		 2683 /*
2684 * destroy_work's may be chained but destroy_workqueue()
2685 * can take care of them. Just kill the fcoe_wq.
2686 */
2687 destroy_workqueue(fcoe_wq);
2e70e241 2688
2ca32b48
TH		 2689 /*
2690 * Detaching from the scsi transport must happen after all
2691 * destroys are done on the fcoe_wq. destroy_workqueue will
2692 * enusre the fcoe_wq is flushed.
2693 */
2e70e241 2694 fcoe_if_exit();
78a58246
YZ		 2695
2696 /* detach from fcoe transport */
2697 fcoe_transport_detach(&fcoe_sw_transport);
85b4aa49
RL		 2698}
2699module_exit(fcoe_exit);
11b56188
CL		 2700
2701/**
2702 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2703 * @seq: active sequence in the FLOGI or FDISC exchange
2704 * @fp: response frame, or error encoded in a pointer (timeout)
2705 * @arg: pointer the the fcoe_ctlr structure
2706 *
65155b37 2707 * This handles MAC address management for FCoE, then passes control on to
11b56188
CL		 2708 * the libfc FLOGI response handler.
2709 */
2710static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2711{
2712 struct fcoe_ctlr *fip = arg;
2713 struct fc_exch *exch = fc_seq_exch(seq);
2714 struct fc_lport *lport = exch->lp;
2715 u8 *mac;
2716
2717 if (IS_ERR(fp))
2718 goto done;
2719
2720 mac = fr_cb(fp)->granted_mac;
907c07d4
VD		 2721 /* pre-FIP */
2722 if (is_zero_ether_addr(mac))
2723 fcoe_ctlr_recv_flogi(fip, lport, fp);
2724 if (!is_zero_ether_addr(mac))
2725 fcoe_update_src_mac(lport, mac);
11b56188
CL		 2726done:
2727 fc_lport_flogi_resp(seq, fp, lport);
2728}
2729
2730/**
2731 * fcoe_logo_resp() - FCoE specific LOGO response handler
2732 * @seq: active sequence in the LOGO exchange
2733 * @fp: response frame, or error encoded in a pointer (timeout)
2734 * @arg: pointer the the fcoe_ctlr structure
2735 *
65155b37 2736 * This handles MAC address management for FCoE, then passes control on to
11b56188
CL		 2737 * the libfc LOGO response handler.
2738 */
2739static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2740{
386309ce 2741 struct fc_lport *lport = arg;
11b56188
CL		 2742 static u8 zero_mac[ETH_ALEN] = { 0 };
2743
2744 if (!IS_ERR(fp))
386309ce 2745 fcoe_update_src_mac(lport, zero_mac);
11b56188
CL		 2746 fc_lport_logo_resp(seq, fp, lport);
2747}
2748
2749/**
2750 * fcoe_elsct_send - FCoE specific ELS handler
2751 *
2752 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2753 * using FCoE specific response handlers and passing the FIP controller as
2754 * the argument (the lport is still available from the exchange).
2755 *
2756 * Most of the work here is just handed off to the libfc routine.
2757 */
1875f27e
RL		 2758static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2759 struct fc_frame *fp, unsigned int op,
2760 void (*resp)(struct fc_seq *,
2761 struct fc_frame *,
2762 void *),
2763 void *arg, u32 timeout)
11b56188
CL		 2764{
2765 struct fcoe_port *port = lport_priv(lport);
8597ae8b 2766 struct fcoe_interface *fcoe = port->priv;
619fe4be 2767 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
11b56188
CL		 2768 struct fc_frame_header *fh = fc_frame_header_get(fp);
2769
2770 switch (op) {
2771 case ELS_FLOGI:
2772 case ELS_FDISC:
e10f8c66
JE		 2773 if (lport->point_to_multipoint)
2774 break;
11b56188
CL		 2775 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2776 fip, timeout);
2777 case ELS_LOGO:
2778 /* only hook onto fabric logouts, not port logouts */
2779 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2780 break;
2781 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
386309ce 2782 lport, timeout);
11b56188
CL		 2783 }
2784 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2785}
2786
9a05753b
CL		 2787/**
2788 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2789 * @vport: fc_vport object to create a new fc_host for
2790 * @disabled: start the new fc_host in a disabled state by default?
2791 *
2792 * Returns: 0 for success
2793 */
2794static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2795{
2796 struct Scsi_Host *shost = vport_to_shost(vport);
2797 struct fc_lport *n_port = shost_priv(shost);
2798 struct fcoe_port *port = lport_priv(n_port);
8597ae8b 2799 struct fcoe_interface *fcoe = port->priv;
9a05753b
CL		 2800 struct net_device *netdev = fcoe->netdev;
2801 struct fc_lport *vn_port;
bdf25218
NP		 2802 int rc;
2803 char buf[32];
2804
2805 rc = fcoe_validate_vport_create(vport);
2806 if (rc) {
d834895c 2807 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
bdf25218
NP		 2808 printk(KERN_ERR "fcoe: Failed to create vport, "
2809 "WWPN (0x%s) already exists\n",
2810 buf);
2811 return rc;
2812 }
9a05753b
CL		 2813
2814 mutex_lock(&fcoe_config_mutex);
4bc71cb9 2815 rtnl_lock();
9a05753b 2816 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
4bc71cb9 2817 rtnl_unlock();
9a05753b
CL		 2818 mutex_unlock(&fcoe_config_mutex);
2819
2820 if (IS_ERR(vn_port)) {
2821 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2822 netdev->name);
2823 return -EIO;
2824 }
2825
2826 if (disabled) {
2827 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2828 } else {
2829 vn_port->boot_time = jiffies;
2830 fc_fabric_login(vn_port);
2831 fc_vport_setlink(vn_port);
2832 }
2833 return 0;
2834}
2835
2836/**
2837 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2838 * @vport: fc_vport object that is being destroyed
2839 *
2840 * Returns: 0 for success
2841 */
2842static int fcoe_vport_destroy(struct fc_vport *vport)
2843{
2844 struct Scsi_Host *shost = vport_to_shost(vport);
2845 struct fc_lport *n_port = shost_priv(shost);
2846 struct fc_lport *vn_port = vport->dd_data;
9a05753b
CL		 2847
2848 mutex_lock(&n_port->lp_mutex);
2849 list_del(&vn_port->list);
2850 mutex_unlock(&n_port->lp_mutex);
ccefd23e
RL		 2851
2852 mutex_lock(&fcoe_config_mutex);
2853 fcoe_if_destroy(vn_port);
2854 mutex_unlock(&fcoe_config_mutex);
2855
9a05753b
CL		 2856 return 0;
2857}
2858
2859/**
2860 * fcoe_vport_disable() - change vport state
2861 * @vport: vport to bring online/offline
2862 * @disable: should the vport be disabled?
2863 */
2864static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2865{
2866 struct fc_lport *lport = vport->dd_data;
2867
2868 if (disable) {
2869 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2870 fc_fabric_logoff(lport);
2871 } else {
2872 lport->boot_time = jiffies;
2873 fc_fabric_login(lport);
2874 fc_vport_setlink(lport);
2875 }
2876
2877 return 0;
2878}
2879
dc8596d3
CL		 2880/**
2881 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2882 * @vport: fc_vport with a new symbolic name string
2883 *
2884 * After generating a new symbolic name string, a new RSPN_ID request is
2885 * sent to the name server. There is no response handler, so if it fails
2886 * for some reason it will not be retried.
2887 */
2888static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2889{
2890 struct fc_lport *lport = vport->dd_data;
2891 struct fc_frame *fp;
2892 size_t len;
2893
2894 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2895 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2896 fcoe_netdev(lport)->name, vport->symbolic_name);
2897
2898 if (lport->state != LPORT_ST_READY)
2899 return;
2900
2901 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2902 fp = fc_frame_alloc(lport,
2903 sizeof(struct fc_ct_hdr) +
2904 sizeof(struct fc_ns_rspn) + len);
2905 if (!fp)
2906 return;
2907 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
b94f8951 2908 NULL, NULL, 3 * lport->r_a_tov);
dc8596d3 2909}
b84056bf 2910
8d55e507
RL		 2911static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev)
2912{
2913 struct fcoe_ctlr_device *ctlr_dev =
2914 fcoe_fcf_dev_to_ctlr_dev(fcf_dev);
2915 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
2916 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);
2917
2918 fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev);
2919}
2920
7d65b0df
JE		 2921/**
2922 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2923 * @lport: the local port
2924 * @port_id: the port ID
2925 * @fp: the received frame, if any, that caused the port_id to be set.
2926 *
2927 * This routine handles the case where we received a FLOGI and are
2928 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2929 * so it can set the non-mapped mode and gateway address.
2930 *
2931 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2932 */
2933static void fcoe_set_port_id(struct fc_lport *lport,
2934 u32 port_id, struct fc_frame *fp)
2935{
2936 struct fcoe_port *port = lport_priv(lport);
8597ae8b 2937 struct fcoe_interface *fcoe = port->priv;
619fe4be 2938 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
7d65b0df
JE		 2939
2940 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
619fe4be 2941 fcoe_ctlr_recv_flogi(ctlr, lport, fp);
7d65b0df 2942}
Linux kernel - Deliverables
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