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Merge tag 'iwlwifi-for-kalle-2015-01-13' of https://git.kernel.org/pub/scm/linux...
[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,
db5ed4df 283 .change_queue_depth = scsi_change_queue_depth,
7f349142 284 .this_id = -1,
14caf44c 285 .cmd_per_lun = 3,
7f349142
VD		 286 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
287 .use_clustering = ENABLE_CLUSTERING,
288 .sg_tablesize = SG_ALL,
289 .max_sectors = 0xffff,
2ecb204d 290 .use_blk_tags = 1,
c40ecc12 291 .track_queue_depth = 1,
7f349142
VD		 292};
293
54b649f8 294/**
1875f27e
RL		 295 * fcoe_interface_setup() - Setup a FCoE interface
296 * @fcoe: The new FCoE interface
297 * @netdev: The net device that the fcoe interface is on
54b649f8
CL		 298 *
299 * Returns : 0 for success
2e70e241 300 * Locking: must be called with the RTNL mutex held
54b649f8
CL		 301 */
302static int fcoe_interface_setup(struct fcoe_interface *fcoe,
303 struct net_device *netdev)
304{
619fe4be 305 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
54b649f8 306 struct netdev_hw_addr *ha;
5bab87e6 307 struct net_device *real_dev;
54b649f8 308 u8 flogi_maddr[ETH_ALEN];
b7a727f1 309 const struct net_device_ops *ops;
54b649f8
CL		 310
311 fcoe->netdev = netdev;
312
b7a727f1
YZ		 313 /* Let LLD initialize for FCoE */
314 ops = netdev->netdev_ops;
315 if (ops->ndo_fcoe_enable) {
316 if (ops->ndo_fcoe_enable(netdev))
317 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
318 " specific feature for LLD.\n");
319 }
320
54b649f8 321 /* Do not support for bonding device */
cc8bdf06 322 if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) {
59d92516 323 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
54b649f8
CL		 324 return -EOPNOTSUPP;
325 }
326
327 /* look for SAN MAC address, if multiple SAN MACs exist, only
328 * use the first one for SPMA */
5bab87e6
YZ		 329 real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ?
330 vlan_dev_real_dev(netdev) : netdev;
d1483bb9 331 fcoe->realdev = real_dev;
54b649f8 332 rcu_read_lock();
5bab87e6 333 for_each_dev_addr(real_dev, ha) {
54b649f8 334 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
bf361707 335 (is_valid_ether_addr(ha->addr))) {
54b649f8
CL		 336 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
337 fip->spma = 1;
338 break;
339 }
340 }
341 rcu_read_unlock();
342
343 /* setup Source Mac Address */
344 if (!fip->spma)
345 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
346
347 /*
348 * Add FCoE MAC address as second unicast MAC address
349 * or enter promiscuous mode if not capable of listening
350 * for multiple unicast MACs.
351 */
54b649f8 352 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
a748ee24 353 dev_uc_add(netdev, flogi_maddr);
54b649f8 354 if (fip->spma)
a748ee24 355 dev_uc_add(netdev, fip->ctl_src_addr);
e10f8c66
JE		 356 if (fip->mode == FIP_MODE_VN2VN) {
357 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS);
358 dev_mc_add(netdev, FIP_ALL_P2P_MACS);
359 } else
360 dev_mc_add(netdev, FIP_ALL_ENODE_MACS);
54b649f8
CL		 361
362 /*
363 * setup the receive function from ethernet driver
364 * on the ethertype for the given device
365 */
366 fcoe->fcoe_packet_type.func = fcoe_rcv;
367 fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
368 fcoe->fcoe_packet_type.dev = netdev;
369 dev_add_pack(&fcoe->fcoe_packet_type);
370
371 fcoe->fip_packet_type.func = fcoe_fip_recv;
372 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
373 fcoe->fip_packet_type.dev = netdev;
374 dev_add_pack(&fcoe->fip_packet_type);
375
376 return 0;
377}
378
030f4e00 379/**
1875f27e
RL		 380 * fcoe_interface_create() - Create a FCoE interface on a net device
381 * @netdev: The net device to create the FCoE interface on
1dd454d9 382 * @fip_mode: The mode to use for FIP
030f4e00
CL		 383 *
384 * Returns: pointer to a struct fcoe_interface or NULL on error
385 */
1dd454d9
JE		 386static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
387 enum fip_state fip_mode)
030f4e00 388{
8d55e507 389 struct fcoe_ctlr_device *ctlr_dev;
619fe4be 390 struct fcoe_ctlr *ctlr;
030f4e00 391 struct fcoe_interface *fcoe;
619fe4be 392 int size;
59d92516 393 int err;
030f4e00 394
7287fb91
RL		 395 if (!try_module_get(THIS_MODULE)) {
396 FCOE_NETDEV_DBG(netdev,
397 "Could not get a reference to the module\n");
398 fcoe = ERR_PTR(-EBUSY);
399 goto out;
400 }
401
619fe4be 402 size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface);
8d55e507
RL		 403 ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ,
404 size);
405 if (!ctlr_dev) {
406 FCOE_DBG("Failed to add fcoe_ctlr_device\n");
7287fb91 407 fcoe = ERR_PTR(-ENOMEM);
6f68794c 408 goto out_putmod;
030f4e00
CL		 409 }
410
8d55e507 411 ctlr = fcoe_ctlr_device_priv(ctlr_dev);
9d34876f 412 ctlr->cdev = ctlr_dev;
8d55e507
RL		 413 fcoe = fcoe_ctlr_priv(ctlr);
414
2e70e241 415 dev_hold(netdev);
54b649f8
CL		 416
417 /*
418 * Initialize FIP.
419 */
619fe4be
RL		 420 fcoe_ctlr_init(ctlr, fip_mode);
421 ctlr->send = fcoe_fip_send;
422 ctlr->update_mac = fcoe_update_src_mac;
423 ctlr->get_src_addr = fcoe_get_src_mac;
54b649f8 424
59d92516 425 err = fcoe_interface_setup(fcoe, netdev);
426 if (err) {
619fe4be 427 fcoe_ctlr_destroy(ctlr);
8d55e507 428 fcoe_ctlr_device_delete(ctlr_dev);
59d92516 429 dev_put(netdev);
7287fb91 430 fcoe = ERR_PTR(err);
6f68794c 431 goto out_putmod;
59d92516 432 }
030f4e00 433
7287fb91
RL		 434 goto out;
435
6f68794c 436out_putmod:
7287fb91
RL		 437 module_put(THIS_MODULE);
438out:
030f4e00
CL		 439 return fcoe;
440}
441
54b649f8 442/**
433eba04 443 * fcoe_interface_remove() - remove FCoE interface from netdev
1875f27e 444 * @fcoe: The FCoE interface to be cleaned up
2e70e241
CL		 445 *
446 * Caller must be holding the RTNL mutex
54b649f8 447 */
433eba04 448static void fcoe_interface_remove(struct fcoe_interface *fcoe)
54b649f8
CL		 449{
450 struct net_device *netdev = fcoe->netdev;
619fe4be 451 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
54b649f8 452 u8 flogi_maddr[ETH_ALEN];
b7a727f1 453 const struct net_device_ops *ops;
54b649f8
CL		 454
455 /*
456 * Don't listen for Ethernet packets anymore.
457 * synchronize_net() ensures that the packet handlers are not running
458 * on another CPU. dev_remove_pack() would do that, this calls the
459 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
460 */
461 __dev_remove_pack(&fcoe->fcoe_packet_type);
462 __dev_remove_pack(&fcoe->fip_packet_type);
463 synchronize_net();
464
54b649f8 465 /* Delete secondary MAC addresses */
54b649f8 466 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
a748ee24 467 dev_uc_del(netdev, flogi_maddr);
54b649f8 468 if (fip->spma)
a748ee24 469 dev_uc_del(netdev, fip->ctl_src_addr);
e10f8c66
JE		 470 if (fip->mode == FIP_MODE_VN2VN) {
471 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);
472 dev_mc_del(netdev, FIP_ALL_P2P_MACS);
473 } else
474 dev_mc_del(netdev, FIP_ALL_ENODE_MACS);
b7a727f1
YZ		 475
476 /* Tell the LLD we are done w/ FCoE */
477 ops = netdev->netdev_ops;
478 if (ops->ndo_fcoe_disable) {
479 if (ops->ndo_fcoe_disable(netdev))
480 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
481 " specific feature for LLD.\n");
482 }
433eba04
VD		 483 fcoe->removed = 1;
484}
485
486
487/**
488 * fcoe_interface_cleanup() - Clean up a FCoE interface
489 * @fcoe: The FCoE interface to be cleaned up
490 */
491static void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
492{
493 struct net_device *netdev = fcoe->netdev;
619fe4be 494 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
b2085a4e 495
433eba04
VD		 496 rtnl_lock();
497 if (!fcoe->removed)
498 fcoe_interface_remove(fcoe);
848e7d5b
RL		 499 rtnl_unlock();
500
b2085a4e 501 /* Release the self-reference taken during fcoe_interface_create() */
1a8ef414
RL		 502 /* tear-down the FCoE controller */
503 fcoe_ctlr_destroy(fip);
619fe4be 504 scsi_host_put(fip->lp->host);
1a8ef414
RL		 505 dev_put(netdev);
506 module_put(THIS_MODULE);
030f4e00
CL		 507}
508
ab6b85c1 509/**
1875f27e
RL		 510 * fcoe_fip_recv() - Handler for received FIP frames
511 * @skb: The receive skb
512 * @netdev: The associated net device
513 * @ptype: The packet_type structure which was used to register this handler
514 * @orig_dev: The original net_device the the skb was received on.
515 * (in case dev is a bond)
ab6b85c1
VD		 516 *
517 * Returns: 0 for success
518 */
1875f27e 519static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
ab6b85c1
VD		 520 struct packet_type *ptype,
521 struct net_device *orig_dev)
522{
259ad85d 523 struct fcoe_interface *fcoe;
619fe4be 524 struct fcoe_ctlr *ctlr;
ab6b85c1 525
259ad85d 526 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
619fe4be
RL		 527 ctlr = fcoe_to_ctlr(fcoe);
528 fcoe_ctlr_recv(ctlr, skb);
ab6b85c1
VD		 529 return 0;
530}
531
980f5156
VD		 532/**
533 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame
534 * @port: The FCoE port
535 * @skb: The FIP/FCoE packet to be sent
536 */
537static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb)
538{
539 if (port->fcoe_pending_queue.qlen)
540 fcoe_check_wait_queue(port->lport, skb);
541 else if (fcoe_start_io(skb))
542 fcoe_check_wait_queue(port->lport, skb);
543}
544
ab6b85c1 545/**
1875f27e
RL		 546 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
547 * @fip: The FCoE controller
548 * @skb: The FIP packet to be sent
ab6b85c1
VD		 549 */
550static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
551{
3fe9a0ba 552 skb->dev = fcoe_from_ctlr(fip)->netdev;
980f5156 553 fcoe_port_send(lport_priv(fip->lp), skb);
ab6b85c1
VD		 554}
555
556/**
1875f27e
RL		 557 * fcoe_update_src_mac() - Update the Ethernet MAC filters
558 * @lport: The local port to update the source MAC on
559 * @addr: Unicast MAC address to add
ab6b85c1
VD		 560 *
561 * Remove any previously-set unicast MAC filter.
562 * Add secondary FCoE MAC address filter for our OUI.
563 */
11b56188 564static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
ab6b85c1 565{
11b56188 566 struct fcoe_port *port = lport_priv(lport);
8597ae8b 567 struct fcoe_interface *fcoe = port->priv;
25024989 568
11b56188 569 if (!is_zero_ether_addr(port->data_src_addr))
a748ee24 570 dev_uc_del(fcoe->netdev, port->data_src_addr);
11b56188 571 if (!is_zero_ether_addr(addr))
a748ee24 572 dev_uc_add(fcoe->netdev, addr);
11b56188 573 memcpy(port->data_src_addr, addr, ETH_ALEN);
ab6b85c1
VD		 574}
575
11b56188
CL		 576/**
577 * fcoe_get_src_mac() - return the Ethernet source address for an lport
578 * @lport: libfc lport
579 */
580static u8 *fcoe_get_src_mac(struct fc_lport *lport)
581{
582 struct fcoe_port *port = lport_priv(lport);
583
584 return port->data_src_addr;
585}
586
7f349142 587/**
1875f27e
RL		 588 * fcoe_lport_config() - Set up a local port
589 * @lport: The local port to be setup
7f349142
VD		 590 *
591 * Returns: 0 for success
592 */
1875f27e 593static int fcoe_lport_config(struct fc_lport *lport)
7f349142 594{
1875f27e
RL		 595 lport->link_up = 0;
596 lport->qfull = 0;
597 lport->max_retry_count = 3;
598 lport->max_rport_retry_count = 3;
599 lport->e_d_tov = 2 * 1000; /* FC-FS default */
600 lport->r_a_tov = 2 * 2 * 1000;
601 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
602 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
603 lport->does_npiv = 1;
604
605 fc_lport_init_stats(lport);
7f349142
VD		 606
607 /* lport fc_lport related configuration */
1875f27e 608 fc_lport_config(lport);
7f349142
VD		 609
610 /* offload related configuration */
1875f27e
RL		 611 lport->crc_offload = 0;
612 lport->seq_offload = 0;
613 lport->lro_enabled = 0;
614 lport->lro_xid = 0;
615 lport->lso_max = 0;
7f349142
VD		 616
617 return 0;
618}
619
54a5b21d
YZ		 620/**
621 * fcoe_netdev_features_change - Updates the lport's offload flags based
622 * on the LLD netdev's FCoE feature flags
623 */
624static void fcoe_netdev_features_change(struct fc_lport *lport,
625 struct net_device *netdev)
626{
627 mutex_lock(&lport->lp_mutex);
628
629 if (netdev->features & NETIF_F_SG)
630 lport->sg_supp = 1;
631 else
632 lport->sg_supp = 0;
633
634 if (netdev->features & NETIF_F_FCOE_CRC) {
635 lport->crc_offload = 1;
636 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
637 } else {
638 lport->crc_offload = 0;
639 }
640
641 if (netdev->features & NETIF_F_FSO) {
642 lport->seq_offload = 1;
643 lport->lso_max = netdev->gso_max_size;
644 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
645 lport->lso_max);
646 } else {
647 lport->seq_offload = 0;
648 lport->lso_max = 0;
649 }
650
651 if (netdev->fcoe_ddp_xid) {
652 lport->lro_enabled = 1;
653 lport->lro_xid = netdev->fcoe_ddp_xid;
654 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
655 lport->lro_xid);
656 } else {
657 lport->lro_enabled = 0;
658 lport->lro_xid = 0;
659 }
660
661 mutex_unlock(&lport->lp_mutex);
662}
663
7f349142 664/**
1875f27e
RL		 665 * fcoe_netdev_config() - Set up net devive for SW FCoE
666 * @lport: The local port that is associated with the net device
667 * @netdev: The associated net device
7f349142 668 *
1875f27e 669 * Must be called after fcoe_lport_config() as it will use local port mutex
7f349142 670 *
1875f27e 671 * Returns: 0 for success
7f349142 672 */
1875f27e 673static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
7f349142
VD		 674{
675 u32 mfs;
676 u64 wwnn, wwpn;
25024989 677 struct fcoe_interface *fcoe;
619fe4be 678 struct fcoe_ctlr *ctlr;
014f5c3f 679 struct fcoe_port *port;
7f349142
VD		 680
681 /* Setup lport private data to point to fcoe softc */
1875f27e 682 port = lport_priv(lport);
8597ae8b 683 fcoe = port->priv;
619fe4be 684 ctlr = fcoe_to_ctlr(fcoe);
7f349142
VD		 685
686 /*
687 * Determine max frame size based on underlying device and optional
688 * user-configured limit. If the MFS is too low, fcoe_link_ok()
689 * will return 0, so do this first.
690 */
7221d7e5
YZ		 691 mfs = netdev->mtu;
692 if (netdev->features & NETIF_F_FCOE_MTU) {
693 mfs = FCOE_MTU;
694 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
695 }
696 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
1875f27e 697 if (fc_set_mfs(lport, mfs))
7f349142
VD		 698 return -EINVAL;
699
7f349142 700 /* offload features support */
54a5b21d 701 fcoe_netdev_features_change(lport, netdev);
7f349142 702
014f5c3f
CL		 703 skb_queue_head_init(&port->fcoe_pending_queue);
704 port->fcoe_pending_queue_active = 0;
1875f27e 705 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
7f349142 706
5e4f8fe7
RL		 707 fcoe_link_speed_update(lport);
708
1875f27e 709 if (!lport->vport) {
dcece412 710 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
619fe4be 711 wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0);
1875f27e 712 fc_set_wwnn(lport, wwnn);
dcece412 713 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
619fe4be 714 wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr,
cf4aebca 715 2, 0);
1875f27e 716 fc_set_wwpn(lport, wwpn);
9a05753b 717 }
7f349142 718
7f349142
VD		 719 return 0;
720}
721
722/**
1875f27e
RL		 723 * fcoe_shost_config() - Set up the SCSI host associated with a local port
724 * @lport: The local port
1875f27e 725 * @dev: The device associated with the SCSI host
7f349142
VD		 726 *
727 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
728 *
1875f27e 729 * Returns: 0 for success
7f349142 730 */
8ba00a4b 731static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)
7f349142
VD		 732{
733 int rc = 0;
734
735 /* lport scsi host config */
1875f27e
RL		 736 lport->host->max_lun = FCOE_MAX_LUN;
737 lport->host->max_id = FCOE_MAX_FCP_TARGET;
738 lport->host->max_channel = 0;
da87bfab
VD		 739 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;
740
1875f27e 741 if (lport->vport)
8ca86f84 742 lport->host->transportt = fcoe_vport_scsi_transport;
e9084bb8 743 else
8ca86f84 744 lport->host->transportt = fcoe_nport_scsi_transport;
7f349142
VD		 745
746 /* add the new host to the SCSI-ml */
1875f27e 747 rc = scsi_add_host(lport->host, dev);
7f349142 748 if (rc) {
1875f27e 749 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
d5488eb9 750 "error on scsi_add_host\n");
7f349142
VD		 751 return rc;
752 }
9a05753b 753
1875f27e 754 if (!lport->vport)
4be929be 755 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
9a05753b 756
1875f27e 757 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
5baa17c3 758 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
1875f27e 759 fcoe_netdev(lport)->name);
7f349142
VD		 760
761 return 0;
762}
763
6fef3902
NP		 764
765/**
766 * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE
767 * @lport: The local port that is associated with the net device
768 * @netdev: The associated net device
769 *
770 * Must be called after fcoe_shost_config() as it will use local port mutex
771 *
772 */
773static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev)
774{
775 struct fcoe_interface *fcoe;
776 struct fcoe_port *port;
777 struct net_device *realdev;
778 int rc;
6fef3902
NP		 779
780 port = lport_priv(lport);
781 fcoe = port->priv;
782 realdev = fcoe->realdev;
783
784 if (!realdev)
785 return;
786
787 /* No FDMI state m/c for NPIV ports */
788 if (lport->vport)
789 return;
790
791 if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) {
f07d46bb
NP		 792 struct netdev_fcoe_hbainfo *fdmi;
793 fdmi = kzalloc(sizeof(*fdmi), GFP_KERNEL);
794 if (!fdmi)
795 return;
796
6fef3902 797 rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev,
f07d46bb 798 fdmi);
6fef3902
NP		 799 if (rc) {
800 printk(KERN_INFO "fcoe: Failed to retrieve FDMI "
801 "information from netdev.\n");
802 return;
803 }
804
805 snprintf(fc_host_serial_number(lport->host),
806 FC_SERIAL_NUMBER_SIZE,
807 "%s",
f07d46bb 808 fdmi->serial_number);
6fef3902
NP		 809 snprintf(fc_host_manufacturer(lport->host),
810 FC_SERIAL_NUMBER_SIZE,
811 "%s",
f07d46bb 812 fdmi->manufacturer);
6fef3902
NP		 813 snprintf(fc_host_model(lport->host),
814 FC_SYMBOLIC_NAME_SIZE,
815 "%s",
f07d46bb 816 fdmi->model);
6fef3902
NP		 817 snprintf(fc_host_model_description(lport->host),
818 FC_SYMBOLIC_NAME_SIZE,
819 "%s",
f07d46bb 820 fdmi->model_description);
6fef3902
NP		 821 snprintf(fc_host_hardware_version(lport->host),
822 FC_VERSION_STRING_SIZE,
823 "%s",
f07d46bb 824 fdmi->hardware_version);
6fef3902
NP		 825 snprintf(fc_host_driver_version(lport->host),
826 FC_VERSION_STRING_SIZE,
827 "%s",
f07d46bb 828 fdmi->driver_version);
6fef3902
NP		 829 snprintf(fc_host_optionrom_version(lport->host),
830 FC_VERSION_STRING_SIZE,
831 "%s",
f07d46bb 832 fdmi->optionrom_version);
6fef3902
NP		 833 snprintf(fc_host_firmware_version(lport->host),
834 FC_VERSION_STRING_SIZE,
835 "%s",
f07d46bb 836 fdmi->firmware_version);
6fef3902
NP		 837
838 /* Enable FDMI lport states */
839 lport->fdmi_enabled = 1;
f07d46bb 840 kfree(fdmi);
6fef3902
NP		 841 } else {
842 lport->fdmi_enabled = 0;
843 printk(KERN_INFO "fcoe: No FDMI support.\n");
844 }
845}
846
1875f27e
RL		 847/**
848 * fcoe_oem_match() - The match routine for the offloaded exchange manager
849 * @fp: The I/O frame
d7179680 850 *
1875f27e
RL		 851 * This routine will be associated with an exchange manager (EM). When
852 * the libfc exchange handling code is looking for an EM to use it will
853 * call this routine and pass it the frame that it wishes to send. This
854 * routine will return True if the associated EM is to be used and False
855 * if the echange code should continue looking for an EM.
856 *
857 * The offload EM that this routine is associated with will handle any
858 * packets that are for SCSI read requests.
859 *
1ff9918b
KP		 860 * This has been enhanced to work when FCoE stack is operating in target
861 * mode.
862 *
1875f27e 863 * Returns: True for read types I/O, otherwise returns false.
d7179680 864 */
7c9c6841 865static bool fcoe_oem_match(struct fc_frame *fp)
d7179680 866{
1ff9918b
KP		 867 struct fc_frame_header *fh = fc_frame_header_get(fp);
868 struct fcp_cmnd *fcp;
869
870 if (fc_fcp_is_read(fr_fsp(fp)) &&
871 (fr_fsp(fp)->data_len > fcoe_ddp_min))
872 return true;
a762dce4
YZ		 873 else if ((fr_fsp(fp) == NULL) &&
874 (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) &&
875 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) {
1ff9918b 876 fcp = fc_frame_payload_get(fp, sizeof(*fcp));
a762dce4
YZ		 877 if ((fcp->fc_flags & FCP_CFL_WRDATA) &&
878 (ntohl(fcp->fc_dl) > fcoe_ddp_min))
1ff9918b
KP		 879 return true;
880 }
881 return false;
d7179680
VD		 882}
883
7f349142 884/**
1875f27e
RL		 885 * fcoe_em_config() - Allocate and configure an exchange manager
886 * @lport: The local port that the new EM will be associated with
7f349142 887 *
1875f27e 888 * Returns: 0 on success
7f349142 889 */
1875f27e 890static inline int fcoe_em_config(struct fc_lport *lport)
7f349142 891{
1875f27e 892 struct fcoe_port *port = lport_priv(lport);
8597ae8b 893 struct fcoe_interface *fcoe = port->priv;
25024989 894 struct fcoe_interface *oldfcoe = NULL;
1d1b88dc 895 struct net_device *old_real_dev, *cur_real_dev;
d7179680
VD		 896 u16 min_xid = FCOE_MIN_XID;
897 u16 max_xid = FCOE_MAX_XID;
898
899 /*
900 * Check if need to allocate an em instance for
901 * offload exchange ids to be shared across all VN_PORTs/lport.
902 */
1875f27e
RL		 903 if (!lport->lro_enabled || !lport->lro_xid ||
904 (lport->lro_xid >= max_xid)) {
905 lport->lro_xid = 0;
d7179680
VD		 906 goto skip_oem;
907 }
908
909 /*
910 * Reuse existing offload em instance in case
1d1b88dc 911 * it is already allocated on real eth device
d7179680 912 */
25024989
CL		 913 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
914 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
1d1b88dc 915 else
25024989 916 cur_real_dev = fcoe->netdev;
1d1b88dc 917
25024989 918 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
25024989
CL		 919 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
920 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
1d1b88dc 921 else
25024989 922 old_real_dev = oldfcoe->netdev;
1d1b88dc
VD		 923
924 if (cur_real_dev == old_real_dev) {
991cbb60 925 fcoe->oem = oldfcoe->oem;
d7179680
VD		 926 break;
927 }
928 }
929
991cbb60 930 if (fcoe->oem) {
1875f27e 931 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
d7179680
VD		 932 printk(KERN_ERR "fcoe_em_config: failed to add "
933 "offload em:%p on interface:%s\n",
991cbb60 934 fcoe->oem, fcoe->netdev->name);
d7179680
VD		 935 return -ENOMEM;
936 }
937 } else {
1875f27e
RL		 938 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
939 FCOE_MIN_XID, lport->lro_xid,
940 fcoe_oem_match);
991cbb60 941 if (!fcoe->oem) {
d7179680
VD		 942 printk(KERN_ERR "fcoe_em_config: failed to allocate "
943 "em for offload exches on interface:%s\n",
25024989 944 fcoe->netdev->name);
d7179680
VD		 945 return -ENOMEM;
946 }
947 }
948
949 /*
950 * Exclude offload EM xid range from next EM xid range.
951 */
1875f27e 952 min_xid += lport->lro_xid + 1;
d7179680
VD		 953
954skip_oem:
1875f27e 955 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
d7179680 956 printk(KERN_ERR "fcoe_em_config: failed to "
25024989 957 "allocate em on interface %s\n", fcoe->netdev->name);
7f349142 958 return -ENOMEM;
d7179680 959 }
7f349142
VD		 960
961 return 0;
962}
963
964/**
1875f27e
RL		 965 * fcoe_if_destroy() - Tear down a SW FCoE instance
966 * @lport: The local port to be destroyed
34ce27bc 967 *
7f349142 968 */
af7f85d9 969static void fcoe_if_destroy(struct fc_lport *lport)
7f349142 970{
b2085a4e
NP		 971 struct fcoe_port *port = lport_priv(lport);
972 struct fcoe_interface *fcoe = port->priv;
973 struct net_device *netdev = fcoe->netdev;
974
975 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
976
977 /* Logout of the fabric */
978 fc_fabric_logoff(lport);
979
980 /* Cleanup the fc_lport */
981 fc_lport_destroy(lport);
982
983 /* Stop the transmit retry timer */
984 del_timer_sync(&port->timer);
985
986 /* Free existing transmit skbs */
987 fcoe_clean_pending_queue(lport);
988
989 rtnl_lock();
990 if (!is_zero_ether_addr(port->data_src_addr))
991 dev_uc_del(netdev, port->data_src_addr);
433eba04
VD		 992 if (lport->vport)
993 synchronize_net();
994 else
995 fcoe_interface_remove(fcoe);
b2085a4e
NP		 996 rtnl_unlock();
997
f161fb72 998 /* Free queued packets for the per-CPU receive threads */
af7f85d9 999 fcoe_percpu_clean(lport);
f161fb72 1000
7f349142 1001 /* Detach from the scsi-ml */
af7f85d9
CL		 1002 fc_remove_host(lport->host);
1003 scsi_remove_host(lport->host);
7f349142 1004
80e736f8
YZ		 1005 /* Destroy lport scsi_priv */
1006 fc_fcp_destroy(lport);
1007
7f349142 1008 /* There are no more rports or I/O, free the EM */
af7f85d9 1009 fc_exch_mgr_free(lport);
7f349142 1010
7f349142 1011 /* Free memory used by statistical counters */
af7f85d9 1012 fc_lport_free_stats(lport);
7f349142 1013
3cab4468
VD		 1014 /*
1015 * Release the Scsi_Host for vport but hold on to
1016 * master lport until it fcoe interface fully cleaned-up.
1017 */
1018 if (lport->vport)
1019 scsi_host_put(lport->host);
7f349142
VD		 1020}
1021
1875f27e
RL		 1022/**
1023 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
1024 * @lport: The local port to setup DDP for
1025 * @xid: The exchange ID for this DDP transfer
1026 * @sgl: The scatterlist describing this transfer
1027 * @sgc: The number of sg items
7f349142 1028 *
1875f27e 1029 * Returns: 0 if the DDP context was not configured
7f349142 1030 */
1875f27e
RL		 1031static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
1032 struct scatterlist *sgl, unsigned int sgc)
7f349142 1033{
1875f27e 1034 struct net_device *netdev = fcoe_netdev(lport);
7f349142 1035
1875f27e
RL		 1036 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
1037 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
1038 xid, sgl,
1039 sgc);
7f349142
VD		 1040
1041 return 0;
1042}
1043
71f89491
YZ		 1044/**
1045 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device
1046 * @lport: The local port to setup DDP for
1047 * @xid: The exchange ID for this DDP transfer
1048 * @sgl: The scatterlist describing this transfer
1049 * @sgc: The number of sg items
1050 *
1051 * Returns: 0 if the DDP context was not configured
1052 */
1053static int fcoe_ddp_target(struct fc_lport *lport, u16 xid,
1054 struct scatterlist *sgl, unsigned int sgc)
1055{
1056 struct net_device *netdev = fcoe_netdev(lport);
1057
1058 if (netdev->netdev_ops->ndo_fcoe_ddp_target)
1059 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid,
1060 sgl, sgc);
1061
1062 return 0;
1063}
1064
1065
1875f27e
RL		 1066/**
1067 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
1068 * @lport: The local port to complete DDP on
1069 * @xid: The exchange ID for this DDP transfer
7f349142 1070 *
1875f27e 1071 * Returns: the length of data that have been completed by DDP
7f349142 1072 */
1875f27e 1073static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
7f349142 1074{
1875f27e 1075 struct net_device *netdev = fcoe_netdev(lport);
7f349142 1076
1875f27e
RL		 1077 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
1078 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
7f349142
VD		 1079 return 0;
1080}
1081
7f349142 1082/**
1875f27e
RL		 1083 * fcoe_if_create() - Create a FCoE instance on an interface
1084 * @fcoe: The FCoE interface to create a local port on
1085 * @parent: The device pointer to be the parent in sysfs for the SCSI host
1086 * @npiv: Indicates if the port is a vport or not
7f349142 1087 *
1875f27e 1088 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
7f349142 1089 *
1875f27e 1090 * Returns: The allocated fc_lport or an error pointer
7f349142 1091 */
030f4e00 1092static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
9a05753b 1093 struct device *parent, int npiv)
7f349142 1094{
619fe4be 1095 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
1875f27e 1096 struct net_device *netdev = fcoe->netdev;
72fa396b 1097 struct fc_lport *lport, *n_port;
014f5c3f 1098 struct fcoe_port *port;
72fa396b 1099 struct Scsi_Host *shost;
1875f27e 1100 int rc;
9a05753b
CL		 1101 /*
1102 * parent is only a vport if npiv is 1,
1103 * but we'll only use vport in that case so go ahead and set it
1104 */
1105 struct fc_vport *vport = dev_to_vport(parent);
7f349142 1106
d5488eb9 1107 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
7f349142 1108
72fa396b
VD		 1109 if (!npiv)
1110 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port));
1111 else
1112 lport = libfc_vport_create(vport, sizeof(*port));
1113
86221969 1114 if (!lport) {
d5488eb9 1115 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
af7f85d9 1116 rc = -ENOMEM;
030f4e00 1117 goto out;
7f349142 1118 }
014f5c3f 1119 port = lport_priv(lport);
2e70e241 1120 port->lport = lport;
8597ae8b 1121 port->priv = fcoe;
66524ec9 1122 port->get_netdev = fcoe_netdev;
8597ae8b
BPG		 1123 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH;
1124 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH;
2e70e241 1125 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
7f349142 1126
f9184df3
NH		 1127 /*
1128 * Need to add the lport to the hostlist
1129 * so we catch NETDEV_CHANGE events.
1130 */
1131 fcoe_hostlist_add(lport);
1132
1875f27e 1133 /* configure a fc_lport including the exchange manager */
af7f85d9 1134 rc = fcoe_lport_config(lport);
7f349142 1135 if (rc) {
d5488eb9
RL		 1136 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
1137 "interface\n");
7f349142
VD		 1138 goto out_host_put;
1139 }
1140
9a05753b 1141 if (npiv) {
9f8f3aa6
CL		 1142 FCOE_NETDEV_DBG(netdev, "Setting vport names, "
1143 "%16.16llx %16.16llx\n",
1875f27e 1144 vport->node_name, vport->port_name);
9a05753b
CL		 1145 fc_set_wwnn(lport, vport->node_name);
1146 fc_set_wwpn(lport, vport->port_name);
1147 }
1148
ab6b85c1 1149 /* configure lport network properties */
af7f85d9 1150 rc = fcoe_netdev_config(lport, netdev);
ab6b85c1 1151 if (rc) {
d5488eb9
RL		 1152 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
1153 "interface\n");
54b649f8 1154 goto out_lp_destroy;
ab6b85c1 1155 }
97c8389d 1156
7f349142 1157 /* configure lport scsi host properties */
8ba00a4b 1158 rc = fcoe_shost_config(lport, parent);
7f349142 1159 if (rc) {
d5488eb9
RL		 1160 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
1161 "interface\n");
54b649f8 1162 goto out_lp_destroy;
7f349142
VD		 1163 }
1164
96316099 1165 /* Initialize the library */
619fe4be 1166 rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1);
7f349142 1167 if (rc) {
96316099 1168 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
d5488eb9 1169 "interface\n");
96316099 1170 goto out_lp_destroy;
7f349142
VD		 1171 }
1172
6fef3902
NP		 1173 /* Initialized FDMI information */
1174 fcoe_fdmi_info(lport, netdev);
1175
72fa396b
VD		 1176 /*
1177 * fcoe_em_alloc() and fcoe_hostlist_add() both
1178 * need to be atomic with respect to other changes to the
1179 * hostlist since fcoe_em_alloc() looks for an existing EM
1180 * instance on host list updated by fcoe_hostlist_add().
1181 *
1182 * This is currently handled through the fcoe_config_mutex
1183 * begin held.
1184 */
1185 if (!npiv)
9a05753b
CL		 1186 /* lport exch manager allocation */
1187 rc = fcoe_em_config(lport);
72fa396b
VD		 1188 else {
1189 shost = vport_to_shost(vport);
1190 n_port = shost_priv(shost);
1191 rc = fc_exch_mgr_list_clone(n_port, lport);
1192 }
1193
1194 if (rc) {
1195 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n");
1196 goto out_lp_destroy;
7f349142
VD		 1197 }
1198
af7f85d9 1199 return lport;
7f349142
VD		 1200
1201out_lp_destroy:
af7f85d9 1202 fc_exch_mgr_free(lport);
7f349142 1203out_host_put:
f9184df3 1204 fcoe_hostlist_del(lport);
af7f85d9
CL		 1205 scsi_host_put(lport->host);
1206out:
1207 return ERR_PTR(rc);
7f349142
VD		 1208}
1209
1210/**
1875f27e 1211 * fcoe_if_init() - Initialization routine for fcoe.ko
7f349142 1212 *
1875f27e
RL		 1213 * Attaches the SW FCoE transport to the FC transport
1214 *
1215 * Returns: 0 on success
7f349142
VD		 1216 */
1217static int __init fcoe_if_init(void)
1218{
1219 /* attach to scsi transport */
8ca86f84
YZ		 1220 fcoe_nport_scsi_transport =
1221 fc_attach_transport(&fcoe_nport_fc_functions);
1222 fcoe_vport_scsi_transport =
1223 fc_attach_transport(&fcoe_vport_fc_functions);
7f349142 1224
8ca86f84 1225 if (!fcoe_nport_scsi_transport) {
d5488eb9 1226 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
7f349142
VD		 1227 return -ENODEV;
1228 }
1229
1230 return 0;
1231}
1232
1233/**
1875f27e
RL		 1234 * fcoe_if_exit() - Tear down fcoe.ko
1235 *
1236 * Detaches the SW FCoE transport from the FC transport
7f349142 1237 *
1875f27e 1238 * Returns: 0 on success
7f349142 1239 */
7c9c6841 1240static int __exit fcoe_if_exit(void)
7f349142 1241{
8ca86f84
YZ		 1242 fc_release_transport(fcoe_nport_scsi_transport);
1243 fc_release_transport(fcoe_vport_scsi_transport);
1244 fcoe_nport_scsi_transport = NULL;
1245 fcoe_vport_scsi_transport = NULL;
7f349142
VD		 1246 return 0;
1247}
1248
8976f424 1249/**
1875f27e
RL		 1250 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
1251 * @cpu: The CPU index of the CPU to create a receive thread for
8976f424
RL		 1252 */
1253static void fcoe_percpu_thread_create(unsigned int cpu)
1254{
1255 struct fcoe_percpu_s *p;
1256 struct task_struct *thread;
1257
1258 p = &per_cpu(fcoe_percpu, cpu);
1259
5c609ff9
ED		 1260 thread = kthread_create_on_node(fcoe_percpu_receive_thread,
1261 (void *)p, cpu_to_node(cpu),
1262 "fcoethread/%d", cpu);
8976f424 1263
e7a51997 1264 if (likely(!IS_ERR(thread))) {
8976f424
RL		 1265 kthread_bind(thread, cpu);
1266 wake_up_process(thread);
1267
1268 spin_lock_bh(&p->fcoe_rx_list.lock);
1269 p->thread = thread;
1270 spin_unlock_bh(&p->fcoe_rx_list.lock);
1271 }
1272}
1273
1274/**
1875f27e
RL		 1275 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1276 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
8976f424
RL		 1277 *
1278 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1279 * current CPU's Rx thread. If the thread being destroyed is bound to
1280 * the CPU processing this context the skbs will be freed.
1281 */
1282static void fcoe_percpu_thread_destroy(unsigned int cpu)
1283{
1284 struct fcoe_percpu_s *p;
1285 struct task_struct *thread;
1286 struct page *crc_eof;
1287 struct sk_buff *skb;
1288#ifdef CONFIG_SMP
1289 struct fcoe_percpu_s *p0;
f018b73a 1290 unsigned targ_cpu = get_cpu();
8976f424
RL		 1291#endif /* CONFIG_SMP */
1292
d5488eb9 1293 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu);
8976f424
RL		 1294
1295 /* Prevent any new skbs from being queued for this CPU. */
1296 p = &per_cpu(fcoe_percpu, cpu);
1297 spin_lock_bh(&p->fcoe_rx_list.lock);
1298 thread = p->thread;
1299 p->thread = NULL;
1300 crc_eof = p->crc_eof_page;
1301 p->crc_eof_page = NULL;
1302 p->crc_eof_offset = 0;
1303 spin_unlock_bh(&p->fcoe_rx_list.lock);
1304
1305#ifdef CONFIG_SMP
1306 /*
1307 * Don't bother moving the skb's if this context is running
1308 * on the same CPU that is having its thread destroyed. This
1309 * can easily happen when the module is removed.
1310 */
1311 if (cpu != targ_cpu) {
1312 p0 = &per_cpu(fcoe_percpu, targ_cpu);
1313 spin_lock_bh(&p0->fcoe_rx_list.lock);
1314 if (p0->thread) {
d5488eb9
RL		 1315 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1316 cpu, targ_cpu);
8976f424
RL		 1317
1318 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1319 __skb_queue_tail(&p0->fcoe_rx_list, skb);
1320 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1321 } else {
1322 /*
1323 * The targeted CPU is not initialized and cannot accept
1875f27e 1324 * new skbs. Unlock the targeted CPU and drop the skbs
8976f424
RL		 1325 * on the CPU that is going offline.
1326 */
1327 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1328 kfree_skb(skb);
1329 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1330 }
1331 } else {
1332 /*
1333 * This scenario occurs when the module is being removed
1334 * and all threads are being destroyed. skbs will continue
1335 * to be shifted from the CPU thread that is being removed
1336 * to the CPU thread associated with the CPU that is processing
1337 * the module removal. Once there is only one CPU Rx thread it
1338 * will reach this case and we will drop all skbs and later
1339 * stop the thread.
1340 */
1341 spin_lock_bh(&p->fcoe_rx_list.lock);
1342 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1343 kfree_skb(skb);
1344 spin_unlock_bh(&p->fcoe_rx_list.lock);
1345 }
f018b73a 1346 put_cpu();
8976f424
RL		 1347#else
1348 /*
dd3fd72e 1349 * This a non-SMP scenario where the singular Rx thread is
8976f424
RL		 1350 * being removed. Free all skbs and stop the thread.
1351 */
1352 spin_lock_bh(&p->fcoe_rx_list.lock);
1353 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1354 kfree_skb(skb);
1355 spin_unlock_bh(&p->fcoe_rx_list.lock);
1356#endif
1357
1358 if (thread)
1359 kthread_stop(thread);
1360
1361 if (crc_eof)
1362 put_page(crc_eof);
1363}
1364
1365/**
1875f27e
RL		 1366 * fcoe_cpu_callback() - Handler for CPU hotplug events
1367 * @nfb: The callback data block
1368 * @action: The event triggering the callback
1369 * @hcpu: The index of the CPU that the event is for
8976f424 1370 *
1875f27e 1371 * This creates or destroys per-CPU data for fcoe
8976f424
RL		 1372 *
1373 * Returns NOTIFY_OK always.
1374 */
1375static int fcoe_cpu_callback(struct notifier_block *nfb,
1376 unsigned long action, void *hcpu)
1377{
1378 unsigned cpu = (unsigned long)hcpu;
1379
1380 switch (action) {
1381 case CPU_ONLINE:
1382 case CPU_ONLINE_FROZEN:
d5488eb9 1383 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu);
8976f424
RL		 1384 fcoe_percpu_thread_create(cpu);
1385 break;
1386 case CPU_DEAD:
1387 case CPU_DEAD_FROZEN:
d5488eb9 1388 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu);
8976f424
RL		 1389 fcoe_percpu_thread_destroy(cpu);
1390 break;
1391 default:
1392 break;
1393 }
1394 return NOTIFY_OK;
1395}
1396
064287ee
KP		 1397/**
1398 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming
1399 * command.
064287ee 1400 *
d272281c
VD		 1401 * This routine selects next CPU based on cpumask to distribute
1402 * incoming requests in round robin.
064287ee 1403 *
d272281c 1404 * Returns: int CPU number
064287ee 1405 */
d272281c 1406static inline unsigned int fcoe_select_cpu(void)
064287ee
KP		 1407{
1408 static unsigned int selected_cpu;
1409
d272281c
VD		 1410 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask);
1411 if (selected_cpu >= nr_cpu_ids)
1412 selected_cpu = cpumask_first(cpu_online_mask);
1413
064287ee
KP		 1414 return selected_cpu;
1415}
1416
85b4aa49 1417/**
1875f27e
RL		 1418 * fcoe_rcv() - Receive packets from a net device
1419 * @skb: The received packet
1420 * @netdev: The net device that the packet was received on
1421 * @ptype: The packet type context
1422 * @olddev: The last device net device
85b4aa49 1423 *
1875f27e
RL		 1424 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1425 * FC frame and passes the frame to libfc.
85b4aa49
RL		 1426 *
1427 * Returns: 0 for success
34f42a07 1428 */
7c9c6841 1429static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
85b4aa49
RL		 1430 struct packet_type *ptype, struct net_device *olddev)
1431{
1875f27e 1432 struct fc_lport *lport;
85b4aa49 1433 struct fcoe_rcv_info *fr;
619fe4be 1434 struct fcoe_ctlr *ctlr;
259ad85d 1435 struct fcoe_interface *fcoe;
85b4aa49 1436 struct fc_frame_header *fh;
85b4aa49 1437 struct fcoe_percpu_s *fps;
519e5135 1438 struct ethhdr *eh;
b2f0091f 1439 unsigned int cpu;
85b4aa49 1440
259ad85d 1441 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
619fe4be
RL		 1442 ctlr = fcoe_to_ctlr(fcoe);
1443 lport = ctlr->lp;
1875f27e 1444 if (unlikely(!lport)) {
465b87bf 1445 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n");
85b4aa49
RL		 1446 goto err2;
1447 }
1875f27e 1448 if (!lport->link_up)
97c8389d 1449 goto err2;
85b4aa49 1450
465b87bf
BVA		 1451 FCOE_NETDEV_DBG(netdev,
1452 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
d5488eb9
RL		 1453 skb->len, skb->data_len, skb->head, skb->data,
1454 skb_tail_pointer(skb), skb_end_pointer(skb),
1455 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
85b4aa49 1456
8b612434
NH		 1457
1458 skb = skb_share_check(skb, GFP_ATOMIC);
1459
1460 if (skb == NULL)
1461 return NET_RX_DROP;
1462
519e5135 1463 eh = eth_hdr(skb);
519e5135 1464
619fe4be 1465 if (is_fip_mode(ctlr) &&
6942df7f 1466 !ether_addr_equal(eh->h_source, ctlr->dest_addr)) {
519e5135
VD		 1467 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
1468 eh->h_source);
85b4aa49
RL		 1469 goto err;
1470 }
1471
1472 /*
1473 * Check for minimum frame length, and make sure required FCoE
1474 * and FC headers are pulled into the linear data area.
1475 */
1476 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1875f27e 1477 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
85b4aa49
RL		 1478 goto err;
1479
1480 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1481 fh = (struct fc_frame_header *) skb_transport_header(skb);
1482
0ee31cb5
RL		 1483 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) {
1484 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n",
1485 eh->h_dest);
1486 goto err;
1487 }
1488
85b4aa49 1489 fr = fcoe_dev_from_skb(skb);
1875f27e 1490 fr->fr_dev = lport;
5e5e92df 1491
85b4aa49 1492 /*
b2f0091f
VD		 1493 * In case the incoming frame's exchange is originated from
1494 * the initiator, then received frame's exchange id is ANDed
1495 * with fc_cpu_mask bits to get the same cpu on which exchange
d272281c
VD		 1496 * was originated, otherwise select cpu using rx exchange id
1497 * or fcoe_select_cpu().
85b4aa49 1498 */
b2f0091f
VD		 1499 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1500 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
064287ee 1501 else {
d272281c
VD		 1502 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)
1503 cpu = fcoe_select_cpu();
1504 else
29bdd2bb 1505 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask;
064287ee 1506 }
324f6678
VD		 1507
1508 if (cpu >= nr_cpu_ids)
1509 goto err;
1510
8976f424 1511 fps = &per_cpu(fcoe_percpu, cpu);
94aa29f2 1512 spin_lock(&fps->fcoe_rx_list.lock);
8976f424
RL		 1513 if (unlikely(!fps->thread)) {
1514 /*
1515 * The targeted CPU is not ready, let's target
1516 * the first CPU now. For non-SMP systems this
1517 * will check the same CPU twice.
1518 */
1875f27e 1519 FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread "
d5488eb9
RL		 1520 "ready for incoming skb- using first online "
1521 "CPU.\n");
8976f424 1522
94aa29f2 1523 spin_unlock(&fps->fcoe_rx_list.lock);
6957177f 1524 cpu = cpumask_first(cpu_online_mask);
8976f424 1525 fps = &per_cpu(fcoe_percpu, cpu);
94aa29f2 1526 spin_lock(&fps->fcoe_rx_list.lock);
8976f424 1527 if (!fps->thread) {
94aa29f2 1528 spin_unlock(&fps->fcoe_rx_list.lock);
8976f424
RL		 1529 goto err;
1530 }
1531 }
1532
1533 /*
1534 * We now have a valid CPU that we're targeting for
1535 * this skb. We also have this receive thread locked,
1536 * so we're free to queue skbs into it's queue.
1537 */
85b4aa49 1538
5e70c4c4
NH		 1539 /*
1540 * Note: We used to have a set of conditions under which we would
1541 * call fcoe_recv_frame directly, rather than queuing to the rx list
1542 * as it could save a few cycles, but doing so is prohibited, as
1543 * fcoe_recv_frame has several paths that may sleep, which is forbidden
1544 * in softirq context.
859b7b64 1545 */
5e70c4c4 1546 __skb_queue_tail(&fps->fcoe_rx_list, skb);
20dc3811 1547 if (fps->thread->state == TASK_INTERRUPTIBLE)
5e70c4c4 1548 wake_up_process(fps->thread);
94aa29f2 1549 spin_unlock(&fps->fcoe_rx_list.lock);
85b4aa49 1550
34bac2ef 1551 return NET_RX_SUCCESS;
85b4aa49 1552err:
1bd49b48 1553 per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++;
f018b73a 1554 put_cpu();
85b4aa49
RL		 1555err2:
1556 kfree_skb(skb);
34bac2ef 1557 return NET_RX_DROP;
85b4aa49 1558}
85b4aa49
RL		 1559
1560/**
8597ae8b 1561 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1875f27e
RL		 1562 * @skb: The packet to be transmitted
1563 * @tlen: The total length of the trailer
1564 *
85b4aa49 1565 * Returns: 0 for success
34f42a07 1566 */
8597ae8b 1567static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)
85b4aa49
RL		 1568{
1569 struct fcoe_percpu_s *fps;
8597ae8b 1570 int rc;
85b4aa49 1571
5e5e92df 1572 fps = &get_cpu_var(fcoe_percpu);
8597ae8b 1573 rc = fcoe_get_paged_crc_eof(skb, tlen, fps);
5e5e92df 1574 put_cpu_var(fcoe_percpu);
85b4aa49 1575
8597ae8b 1576 return rc;
85b4aa49 1577}
85b4aa49
RL		 1578
1579/**
1875f27e
RL		 1580 * fcoe_xmit() - Transmit a FCoE frame
1581 * @lport: The local port that the frame is to be transmitted for
1582 * @fp: The frame to be transmitted
85b4aa49 1583 *
1875f27e 1584 * Return: 0 for success
34f42a07 1585 */
7c9c6841 1586static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
85b4aa49 1587{
4bb6b515 1588 int wlen;
85b4aa49
RL		 1589 u32 crc;
1590 struct ethhdr *eh;
1591 struct fcoe_crc_eof *cp;
1592 struct sk_buff *skb;
1bd49b48 1593 struct fc_stats *stats;
85b4aa49
RL		 1594 struct fc_frame_header *fh;
1595 unsigned int hlen; /* header length implies the version */
1596 unsigned int tlen; /* trailer length */
1597 unsigned int elen; /* eth header, may include vlan */
1875f27e 1598 struct fcoe_port *port = lport_priv(lport);
8597ae8b 1599 struct fcoe_interface *fcoe = port->priv;
619fe4be 1600 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
85b4aa49
RL		 1601 u8 sof, eof;
1602 struct fcoe_hdr *hp;
1603
1604 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1605
85b4aa49 1606 fh = fc_frame_header_get(fp);
97c8389d
JE		 1607 skb = fp_skb(fp);
1608 wlen = skb->len / FCOE_WORD_TO_BYTE;
1609
1875f27e 1610 if (!lport->link_up) {
3caf02ee 1611 kfree_skb(skb);
97c8389d 1612 return 0;
85b4aa49
RL		 1613 }
1614
9860eeb4 1615 if (unlikely(fh->fh_type == FC_TYPE_ELS) &&
619fe4be 1616 fcoe_ctlr_els_send(ctlr, lport, skb))
97c8389d
JE		 1617 return 0;
1618
85b4aa49
RL		 1619 sof = fr_sof(fp);
1620 eof = fr_eof(fp);
1621
4e57e1cb 1622 elen = sizeof(struct ethhdr);
85b4aa49
RL		 1623 hlen = sizeof(struct fcoe_hdr);
1624 tlen = sizeof(struct fcoe_crc_eof);
1625 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1626
1627 /* crc offload */
1875f27e 1628 if (likely(lport->crc_offload)) {
cf64bc8f 1629 skb->ip_summed = CHECKSUM_UNNECESSARY;
85b4aa49
RL		 1630 skb->csum_start = skb_headroom(skb);
1631 skb->csum_offset = skb->len;
1632 crc = 0;
1633 } else {
1634 skb->ip_summed = CHECKSUM_NONE;
1635 crc = fcoe_fc_crc(fp);
1636 }
1637
014f5c3f 1638 /* copy port crc and eof to the skb buff */
85b4aa49
RL		 1639 if (skb_is_nonlinear(skb)) {
1640 skb_frag_t *frag;
8597ae8b 1641 if (fcoe_alloc_paged_crc_eof(skb, tlen)) {
e9041581 1642 kfree_skb(skb);
85b4aa49
RL		 1643 return -ENOMEM;
1644 }
1645 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
77dfce07 1646 cp = kmap_atomic(skb_frag_page(frag))
85b4aa49
RL		 1647 + frag->page_offset;
1648 } else {
1649 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
1650 }
1651
1652 memset(cp, 0, sizeof(*cp));
1653 cp->fcoe_eof = eof;
1654 cp->fcoe_crc32 = cpu_to_le32(~crc);
1655
1656 if (skb_is_nonlinear(skb)) {
77dfce07 1657 kunmap_atomic(cp);
85b4aa49
RL		 1658 cp = NULL;
1659 }
1660
014f5c3f 1661 /* adjust skb network/transport offsets to match mac/fcoe/port */
85b4aa49
RL		 1662 skb_push(skb, elen + hlen);
1663 skb_reset_mac_header(skb);
1664 skb_reset_network_header(skb);
1665 skb->mac_len = elen;
211c738d 1666 skb->protocol = htons(ETH_P_FCOE);
31c37a6f 1667 skb->priority = fcoe->priority;
6f6c2aa3 1668
d1483bb9 1669 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN &&
f646968f 1670 fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) {
2884d423 1671 /* must set skb->dev before calling vlan_put_tag */
d1483bb9 1672 skb->dev = fcoe->realdev;
b960a0ac
JP		 1673 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1674 vlan_dev_vlan_id(fcoe->netdev));
d1483bb9
VD		 1675 } else
1676 skb->dev = fcoe->netdev;
85b4aa49
RL		 1677
1678 /* fill up mac and fcoe headers */
1679 eh = eth_hdr(skb);
1680 eh->h_proto = htons(ETH_P_FCOE);
619fe4be
RL		 1681 memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN);
1682 if (ctlr->map_dest)
cd229e42 1683 memcpy(eh->h_dest + 3, fh->fh_d_id, 3);
85b4aa49 1684
619fe4be
RL		 1685 if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN))
1686 memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN);
85b4aa49 1687 else
11b56188 1688 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
85b4aa49
RL		 1689
1690 hp = (struct fcoe_hdr *)(eh + 1);
1691 memset(hp, 0, sizeof(*hp));
1692 if (FC_FCOE_VER)
1693 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1694 hp->fcoe_sof = sof;
1695
39ca9a06 1696 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1875f27e 1697 if (lport->seq_offload && fr_max_payload(fp)) {
39ca9a06
YZ		 1698 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1699 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1700 } else {
1701 skb_shinfo(skb)->gso_type = 0;
1702 skb_shinfo(skb)->gso_size = 0;
1703 }
85b4aa49 1704 /* update tx stats: regardless if LLD fails */
1bd49b48 1705 stats = per_cpu_ptr(lport->stats, get_cpu());
582b45bc
RL		 1706 stats->TxFrames++;
1707 stats->TxWords += wlen;
f018b73a 1708 put_cpu();
85b4aa49
RL		 1709
1710 /* send down to lld */
1875f27e 1711 fr_dev(fp) = lport;
980f5156 1712 fcoe_port_send(port, skb);
85b4aa49
RL		 1713 return 0;
1714}
85b4aa49 1715
e7a51997 1716/**
1875f27e
RL		 1717 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1718 * @skb: The completed skb (argument required by destructor)
e7a51997
JE		 1719 */
1720static void fcoe_percpu_flush_done(struct sk_buff *skb)
1721{
1722 complete(&fcoe_flush_completion);
1723}
1724
52ee8321
VD		 1725/**
1726 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
1727 * @lport: The local port the frame was received on
1728 * @fp: The received frame
1729 *
1730 * Return: 0 on passing filtering checks
1731 */
1732static inline int fcoe_filter_frames(struct fc_lport *lport,
1733 struct fc_frame *fp)
1734{
619fe4be 1735 struct fcoe_ctlr *ctlr;
52ee8321
VD		 1736 struct fcoe_interface *fcoe;
1737 struct fc_frame_header *fh;
1738 struct sk_buff *skb = (struct sk_buff *)fp;
1bd49b48 1739 struct fc_stats *stats;
52ee8321
VD		 1740
1741 /*
1742 * We only check CRC if no offload is available and if it is
1743 * it's solicited data, in which case, the FCP layer would
1744 * check it during the copy.
1745 */
1746 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
1747 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1748 else
1749 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1750
1751 fh = (struct fc_frame_header *) skb_transport_header(skb);
1752 fh = fc_frame_header_get(fp);
1753 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP)
1754 return 0;
1755
8597ae8b 1756 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;
619fe4be
RL		 1757 ctlr = fcoe_to_ctlr(fcoe);
1758 if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
52ee8321
VD		 1759 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
1760 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1761 return -EINVAL;
1762 }
1763
f2f96d20 1764 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) ||
52ee8321
VD		 1765 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) {
1766 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1767 return 0;
1768 }
1769
1bd49b48 1770 stats = per_cpu_ptr(lport->stats, get_cpu());
52ee8321
VD		 1771 stats->InvalidCRCCount++;
1772 if (stats->InvalidCRCCount < 5)
1773 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
7e1e7ead 1774 put_cpu();
52ee8321
VD		 1775 return -EINVAL;
1776}
1777
34f42a07 1778/**
859b7b64
CL		 1779 * fcoe_recv_frame() - process a single received frame
1780 * @skb: frame to process
85b4aa49 1781 */
859b7b64 1782static void fcoe_recv_frame(struct sk_buff *skb)
85b4aa49 1783{
85b4aa49 1784 u32 fr_len;
1875f27e 1785 struct fc_lport *lport;
85b4aa49 1786 struct fcoe_rcv_info *fr;
1bd49b48 1787 struct fc_stats *stats;
85b4aa49
RL		 1788 struct fcoe_crc_eof crc_eof;
1789 struct fc_frame *fp;
014f5c3f 1790 struct fcoe_port *port;
85b4aa49
RL		 1791 struct fcoe_hdr *hp;
1792
859b7b64
CL		 1793 fr = fcoe_dev_from_skb(skb);
1794 lport = fr->fr_dev;
1795 if (unlikely(!lport)) {
1796 if (skb->destructor != fcoe_percpu_flush_done)
465b87bf 1797 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n");
859b7b64
CL		 1798 kfree_skb(skb);
1799 return;
1800 }
1801
465b87bf
BVA		 1802 FCOE_NETDEV_DBG(skb->dev,
1803 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
859b7b64
CL		 1804 skb->len, skb->data_len,
1805 skb->head, skb->data, skb_tail_pointer(skb),
1806 skb_end_pointer(skb), skb->csum,
1807 skb->dev ? skb->dev->name : "<NULL>");
1808
859b7b64 1809 port = lport_priv(lport);
f1633011 1810 skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */
859b7b64
CL		 1811
1812 /*
1813 * Frame length checks and setting up the header pointers
1814 * was done in fcoe_rcv already.
1815 */
1816 hp = (struct fcoe_hdr *) skb_network_header(skb);
859b7b64 1817
1bd49b48 1818 stats = per_cpu_ptr(lport->stats, get_cpu());
859b7b64
CL		 1819 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1820 if (stats->ErrorFrames < 5)
1821 printk(KERN_WARNING "fcoe: FCoE version "
1822 "mismatch: The frame has "
1823 "version %x, but the "
1824 "initiator supports version "
1825 "%x\n", FC_FCOE_DECAPS_VER(hp),
1826 FC_FCOE_VER);
f018b73a 1827 goto drop;
859b7b64
CL		 1828 }
1829
1830 skb_pull(skb, sizeof(struct fcoe_hdr));
1831 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1832
1833 stats->RxFrames++;
1834 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1835
1836 fp = (struct fc_frame *)skb;
1837 fc_frame_init(fp);
1838 fr_dev(fp) = lport;
1839 fr_sof(fp) = hp->fcoe_sof;
1840
1841 /* Copy out the CRC and EOF trailer for access */
f018b73a
JE		 1842 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof)))
1843 goto drop;
859b7b64
CL		 1844 fr_eof(fp) = crc_eof.fcoe_eof;
1845 fr_crc(fp) = crc_eof.fcoe_crc32;
f018b73a
JE		 1846 if (pskb_trim(skb, fr_len))
1847 goto drop;
859b7b64 1848
52ee8321
VD		 1849 if (!fcoe_filter_frames(lport, fp)) {
1850 put_cpu();
1851 fc_exch_recv(lport, fp);
1852 return;
859b7b64 1853 }
f018b73a
JE		 1854drop:
1855 stats->ErrorFrames++;
1856 put_cpu();
1857 kfree_skb(skb);
859b7b64
CL		 1858}
1859
1860/**
1861 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1862 * @arg: The per-CPU context
1863 *
1864 * Return: 0 for success
1865 */
7c9c6841 1866static int fcoe_percpu_receive_thread(void *arg)
859b7b64
CL		 1867{
1868 struct fcoe_percpu_s *p = arg;
1869 struct sk_buff *skb;
20dc3811
NH		 1870 struct sk_buff_head tmp;
1871
1872 skb_queue_head_init(&tmp);
859b7b64 1873
8698a745 1874 set_user_nice(current, MIN_NICE);
85b4aa49 1875
95fdd5e9 1876retry:
85b4aa49
RL		 1877 while (!kthread_should_stop()) {
1878
1879 spin_lock_bh(&p->fcoe_rx_list.lock);
20dc3811 1880 skb_queue_splice_init(&p->fcoe_rx_list, &tmp);
20dc3811 1881
95fdd5e9 1882 if (!skb_queue_len(&tmp)) {
85b4aa49
RL		 1883 set_current_state(TASK_INTERRUPTIBLE);
1884 spin_unlock_bh(&p->fcoe_rx_list.lock);
1885 schedule();
95fdd5e9
NH		 1886 goto retry;
1887 }
1888
1889 spin_unlock_bh(&p->fcoe_rx_list.lock);
1890
1891 while ((skb = __skb_dequeue(&tmp)) != NULL)
1892 fcoe_recv_frame(skb);
1893
85b4aa49
RL		 1894 }
1895 return 0;
1896}
1897
85b4aa49 1898/**
1875f27e 1899 * fcoe_dev_setup() - Setup the link change notification interface
34f42a07 1900 */
b0d428ad 1901static void fcoe_dev_setup(void)
85b4aa49 1902{
6f6c2aa3 1903 register_dcbevent_notifier(&dcb_notifier);
85b4aa49
RL		 1904 register_netdevice_notifier(&fcoe_notifier);
1905}
1906
1907/**
1875f27e 1908 * fcoe_dev_cleanup() - Cleanup the link change notification interface
34f42a07 1909 */
85b4aa49
RL		 1910static void fcoe_dev_cleanup(void)
1911{
6f6c2aa3 1912 unregister_dcbevent_notifier(&dcb_notifier);
85b4aa49
RL		 1913 unregister_netdevice_notifier(&fcoe_notifier);
1914}
1915
6f6c2aa3 1916static struct fcoe_interface *
1917fcoe_hostlist_lookup_realdev_port(struct net_device *netdev)
1918{
1919 struct fcoe_interface *fcoe;
1920 struct net_device *real_dev;
1921
1922 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1923 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
1924 real_dev = vlan_dev_real_dev(fcoe->netdev);
1925 else
1926 real_dev = fcoe->netdev;
1927
1928 if (netdev == real_dev)
1929 return fcoe;
1930 }
1931 return NULL;
1932}
1933
1934static int fcoe_dcb_app_notification(struct notifier_block *notifier,
1935 ulong event, void *ptr)
1936{
1937 struct dcb_app_type *entry = ptr;
619fe4be 1938 struct fcoe_ctlr *ctlr;
6f6c2aa3 1939 struct fcoe_interface *fcoe;
1940 struct net_device *netdev;
6f6c2aa3 1941 int prio;
1942
1943 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE)
1944 return NOTIFY_OK;
1945
1946 netdev = dev_get_by_index(&init_net, entry->ifindex);
1947 if (!netdev)
1948 return NOTIFY_OK;
1949
1950 fcoe = fcoe_hostlist_lookup_realdev_port(netdev);
1951 dev_put(netdev);
1952 if (!fcoe)
1953 return NOTIFY_OK;
1954
619fe4be
RL		 1955 ctlr = fcoe_to_ctlr(fcoe);
1956
6f6c2aa3 1957 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE)
1958 prio = ffs(entry->app.priority) - 1;
1959 else
1960 prio = entry->app.priority;
1961
1962 if (prio < 0)
1963 return NOTIFY_OK;
1964
1965 if (entry->app.protocol == ETH_P_FIP ||
1966 entry->app.protocol == ETH_P_FCOE)
619fe4be 1967 ctlr->priority = prio;
6f6c2aa3 1968
31c37a6f
NP		 1969 if (entry->app.protocol == ETH_P_FCOE)
1970 fcoe->priority = prio;
6f6c2aa3 1971
1972 return NOTIFY_OK;
1973}
1974
85b4aa49 1975/**
1875f27e
RL		 1976 * fcoe_device_notification() - Handler for net device events
1977 * @notifier: The context of the notification
1978 * @event: The type of event
1979 * @ptr: The net device that the event was on
85b4aa49 1980 *
1875f27e 1981 * This function is called by the Ethernet driver in case of link change event.
85b4aa49
RL		 1982 *
1983 * Returns: 0 for success
34f42a07 1984 */
85b4aa49
RL		 1985static int fcoe_device_notification(struct notifier_block *notifier,
1986 ulong event, void *ptr)
1987{
435c8667 1988 struct fcoe_ctlr_device *cdev;
1875f27e 1989 struct fc_lport *lport = NULL;
351638e7 1990 struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
619fe4be 1991 struct fcoe_ctlr *ctlr;
014f5c3f 1992 struct fcoe_interface *fcoe;
2e70e241 1993 struct fcoe_port *port;
1bd49b48 1994 struct fc_stats *stats;
97c8389d 1995 u32 link_possible = 1;
85b4aa49
RL		 1996 u32 mfs;
1997 int rc = NOTIFY_OK;
1998
014f5c3f 1999 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
25024989 2000 if (fcoe->netdev == netdev) {
619fe4be
RL		 2001 ctlr = fcoe_to_ctlr(fcoe);
2002 lport = ctlr->lp;
85b4aa49
RL		 2003 break;
2004 }
2005 }
1875f27e 2006 if (!lport) {
85b4aa49
RL		 2007 rc = NOTIFY_DONE;
2008 goto out;
2009 }
2010
85b4aa49
RL		 2011 switch (event) {
2012 case NETDEV_DOWN:
2013 case NETDEV_GOING_DOWN:
97c8389d 2014 link_possible = 0;
85b4aa49
RL		 2015 break;
2016 case NETDEV_UP:
2017 case NETDEV_CHANGE:
85b4aa49
RL		 2018 break;
2019 case NETDEV_CHANGEMTU:
7221d7e5
YZ		 2020 if (netdev->features & NETIF_F_FCOE_MTU)
2021 break;
1d1b88dc
VD		 2022 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
2023 sizeof(struct fcoe_crc_eof));
85b4aa49 2024 if (mfs >= FC_MIN_MAX_FRAME)
1875f27e 2025 fc_set_mfs(lport, mfs);
85b4aa49
RL		 2026 break;
2027 case NETDEV_REGISTER:
2028 break;
2e70e241
CL		 2029 case NETDEV_UNREGISTER:
2030 list_del(&fcoe->list);
619fe4be 2031 port = lport_priv(ctlr->lp);
2ca32b48 2032 queue_work(fcoe_wq, &port->destroy_work);
2e70e241
CL		 2033 goto out;
2034 break;
54a5b21d
YZ		 2035 case NETDEV_FEAT_CHANGE:
2036 fcoe_netdev_features_change(lport, netdev);
2037 break;
85b4aa49 2038 default:
1d1b88dc 2039 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
d5488eb9 2040 "from netdev netlink\n", event);
85b4aa49 2041 }
5e4f8fe7
RL		 2042
2043 fcoe_link_speed_update(lport);
2044
435c8667
RL		 2045 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2046
2047 if (link_possible && !fcoe_link_ok(lport)) {
2048 switch (cdev->enabled) {
2049 case FCOE_CTLR_DISABLED:
2050 pr_info("Link up while interface is disabled.\n");
2051 break;
2052 case FCOE_CTLR_ENABLED:
2053 case FCOE_CTLR_UNUSED:
2054 fcoe_ctlr_link_up(ctlr);
2055 };
2056 } else if (fcoe_ctlr_link_down(ctlr)) {
2057 switch (cdev->enabled) {
2058 case FCOE_CTLR_DISABLED:
2059 pr_info("Link down while interface is disabled.\n");
2060 break;
2061 case FCOE_CTLR_ENABLED:
2062 case FCOE_CTLR_UNUSED:
2063 stats = per_cpu_ptr(lport->stats, get_cpu());
2064 stats->LinkFailureCount++;
2065 put_cpu();
2066 fcoe_clean_pending_queue(lport);
2067 };
85b4aa49
RL		 2068 }
2069out:
2070 return rc;
2071}
2072
55a66d3c
VD		 2073/**
2074 * fcoe_disable() - Disables a FCoE interface
78a58246 2075 * @netdev : The net_device object the Ethernet interface to create on
55a66d3c 2076 *
78a58246 2077 * Called from fcoe transport.
55a66d3c
VD		 2078 *
2079 * Returns: 0 for success
435c8667
RL		 2080 *
2081 * Deprecated: use fcoe_ctlr_enabled()
55a66d3c 2082 */
78a58246 2083static int fcoe_disable(struct net_device *netdev)
55a66d3c 2084{
619fe4be 2085 struct fcoe_ctlr *ctlr;
55a66d3c 2086 struct fcoe_interface *fcoe;
55a66d3c
VD		 2087 int rc = 0;
2088
2089 mutex_lock(&fcoe_config_mutex);
55a66d3c 2090
ee5df628 2091 rtnl_lock();
55a66d3c
VD		 2092 fcoe = fcoe_hostlist_lookup_port(netdev);
2093 rtnl_unlock();
2094
9ee50e48 2095 if (fcoe) {
619fe4be
RL		 2096 ctlr = fcoe_to_ctlr(fcoe);
2097 fcoe_ctlr_link_down(ctlr);
2098 fcoe_clean_pending_queue(ctlr->lp);
9ee50e48 2099 } else
55a66d3c
VD		 2100 rc = -ENODEV;
2101
55a66d3c
VD		 2102 mutex_unlock(&fcoe_config_mutex);
2103 return rc;
2104}
2105
2106/**
2107 * fcoe_enable() - Enables a FCoE interface
78a58246 2108 * @netdev : The net_device object the Ethernet interface to create on
55a66d3c 2109 *
78a58246 2110 * Called from fcoe transport.
55a66d3c
VD		 2111 *
2112 * Returns: 0 for success
2113 */
78a58246 2114static int fcoe_enable(struct net_device *netdev)
55a66d3c 2115{
619fe4be 2116 struct fcoe_ctlr *ctlr;
55a66d3c 2117 struct fcoe_interface *fcoe;
55a66d3c
VD		 2118 int rc = 0;
2119
2120 mutex_lock(&fcoe_config_mutex);
ee5df628 2121 rtnl_lock();
55a66d3c
VD		 2122 fcoe = fcoe_hostlist_lookup_port(netdev);
2123 rtnl_unlock();
2124
619fe4be 2125 if (!fcoe) {
55a66d3c 2126 rc = -ENODEV;
619fe4be
RL		 2127 goto out;
2128 }
55a66d3c 2129
619fe4be
RL		 2130 ctlr = fcoe_to_ctlr(fcoe);
2131
2132 if (!fcoe_link_ok(ctlr->lp))
2133 fcoe_ctlr_link_up(ctlr);
2134
2135out:
55a66d3c
VD		 2136 mutex_unlock(&fcoe_config_mutex);
2137 return rc;
2138}
2139
435c8667
RL		 2140/**
2141 * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller
2142 * @cdev: The FCoE Controller that is being enabled or disabled
2143 *
2144 * fcoe_sysfs will ensure that the state of 'enabled' has
2145 * changed, so no checking is necessary here. This routine simply
2146 * calls fcoe_enable or fcoe_disable, both of which are deprecated.
2147 * When those routines are removed the functionality can be merged
2148 * here.
2149 */
2150static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev)
2151{
2152 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev);
2153 struct fc_lport *lport = ctlr->lp;
2154 struct net_device *netdev = fcoe_netdev(lport);
2155
2156 switch (cdev->enabled) {
2157 case FCOE_CTLR_ENABLED:
2158 return fcoe_enable(netdev);
2159 case FCOE_CTLR_DISABLED:
2160 return fcoe_disable(netdev);
2161 case FCOE_CTLR_UNUSED:
2162 default:
2163 return -ENOTSUPP;
2164 };
2165}
2166
85b4aa49 2167/**
1875f27e 2168 * fcoe_destroy() - Destroy a FCoE interface
78a58246 2169 * @netdev : The net_device object the Ethernet interface to create on
1875f27e 2170 *
78a58246 2171 * Called from fcoe transport
85b4aa49
RL		 2172 *
2173 * Returns: 0 for success
34f42a07 2174 */
78a58246 2175static int fcoe_destroy(struct net_device *netdev)
85b4aa49 2176{
619fe4be 2177 struct fcoe_ctlr *ctlr;
030f4e00 2178 struct fcoe_interface *fcoe;
f04ca1b6 2179 struct fc_lport *lport;
b2085a4e 2180 struct fcoe_port *port;
8eca355f 2181 int rc = 0;
85b4aa49 2182
dfc1d0fe 2183 mutex_lock(&fcoe_config_mutex);
ee5df628 2184 rtnl_lock();
2e70e241
CL		 2185 fcoe = fcoe_hostlist_lookup_port(netdev);
2186 if (!fcoe) {
85b4aa49 2187 rc = -ENODEV;
78a58246 2188 goto out_nodev;
85b4aa49 2189 }
619fe4be
RL		 2190 ctlr = fcoe_to_ctlr(fcoe);
2191 lport = ctlr->lp;
b2085a4e 2192 port = lport_priv(lport);
54a5b21d 2193 list_del(&fcoe->list);
b2085a4e 2194 queue_work(fcoe_wq, &port->destroy_work);
85b4aa49 2195out_nodev:
b2085a4e 2196 rtnl_unlock();
dfc1d0fe 2197 mutex_unlock(&fcoe_config_mutex);
85b4aa49
RL		 2198 return rc;
2199}
2200
1875f27e
RL		 2201/**
2202 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
2203 * @work: Handle to the FCoE port to be destroyed
2204 */
2e70e241
CL		 2205static void fcoe_destroy_work(struct work_struct *work)
2206{
f9c4358e
RL		 2207 struct fcoe_ctlr_device *cdev;
2208 struct fcoe_ctlr *ctlr;
2e70e241 2209 struct fcoe_port *port;
b2085a4e 2210 struct fcoe_interface *fcoe;
94aa743a
NP		 2211 struct Scsi_Host *shost;
2212 struct fc_host_attrs *fc_host;
2213 unsigned long flags;
2214 struct fc_vport *vport;
2215 struct fc_vport *next_vport;
2e70e241
CL		 2216
2217 port = container_of(work, struct fcoe_port, destroy_work);
94aa743a
NP		 2218 shost = port->lport->host;
2219 fc_host = shost_to_fc_host(shost);
2220
2221 /* Loop through all the vports and mark them for deletion */
2222 spin_lock_irqsave(shost->host_lock, flags);
2223 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
2224 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
2225 continue;
2226 } else {
2227 vport->flags |= FC_VPORT_DELETING;
2228 queue_work(fc_host_work_q(shost),
2229 &vport->vport_delete_work);
2230 }
2231 }
2232 spin_unlock_irqrestore(shost->host_lock, flags);
2233
2234 flush_workqueue(fc_host_work_q(shost));
2235
2e70e241 2236 mutex_lock(&fcoe_config_mutex);
b2085a4e 2237
b2085a4e 2238 fcoe = port->priv;
f9c4358e
RL		 2239 ctlr = fcoe_to_ctlr(fcoe);
2240 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2241
2e70e241 2242 fcoe_if_destroy(port->lport);
ccefd23e 2243 fcoe_interface_cleanup(fcoe);
b2085a4e 2244
2e70e241 2245 mutex_unlock(&fcoe_config_mutex);
f9c4358e
RL		 2246
2247 fcoe_ctlr_device_delete(cdev);
2e70e241
CL		 2248}
2249
78a58246
YZ		 2250/**
2251 * fcoe_match() - Check if the FCoE is supported on the given netdevice
2252 * @netdev : The net_device object the Ethernet interface to create on
2253 *
2254 * Called from fcoe transport.
2255 *
2256 * Returns: always returns true as this is the default FCoE transport,
2257 * i.e., support all netdevs.
2258 */
2259static bool fcoe_match(struct net_device *netdev)
2260{
2261 return true;
2262}
2263
6f6c2aa3 2264/**
2265 * fcoe_dcb_create() - Initialize DCB attributes and hooks
2266 * @netdev: The net_device object of the L2 link that should be queried
2267 * @port: The fcoe_port to bind FCoE APP priority with
2268 * @
2269 */
2270static void fcoe_dcb_create(struct fcoe_interface *fcoe)
2271{
2272#ifdef CONFIG_DCB
2273 int dcbx;
2274 u8 fup, up;
2275 struct net_device *netdev = fcoe->realdev;
619fe4be 2276 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
6f6c2aa3 2277 struct dcb_app app = {
2278 .priority = 0,
2279 .protocol = ETH_P_FCOE
2280 };
2281
2282 /* setup DCB priority attributes. */
2283 if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) {
2284 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
2285
2286 if (dcbx & DCB_CAP_DCBX_VER_IEEE) {
2287 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
2288 up = dcb_ieee_getapp_mask(netdev, &app);
2289 app.protocol = ETH_P_FIP;
2290 fup = dcb_ieee_getapp_mask(netdev, &app);
2291 } else {
2292 app.selector = DCB_APP_IDTYPE_ETHTYPE;
2293 up = dcb_getapp(netdev, &app);
2294 app.protocol = ETH_P_FIP;
2295 fup = dcb_getapp(netdev, &app);
2296 }
2297
31c37a6f
NP		 2298 fcoe->priority = ffs(up) ? ffs(up) - 1 : 0;
2299 ctlr->priority = ffs(fup) ? ffs(fup) - 1 : fcoe->priority;
6f6c2aa3 2300 }
2301#endif
2302}
2303
435c8667
RL		 2304enum fcoe_create_link_state {
2305 FCOE_CREATE_LINK_DOWN,
2306 FCOE_CREATE_LINK_UP,
2307};
2308
85b4aa49 2309/**
435c8667
RL		 2310 * _fcoe_create() - (internal) Create a fcoe interface
2311 * @netdev : The net_device object the Ethernet interface to create on
2312 * @fip_mode: The FIP mode for this creation
2313 * @link_state: The ctlr link state on creation
1875f27e 2314 *
435c8667
RL		 2315 * Called from either the libfcoe 'create' module parameter
2316 * via fcoe_create or from fcoe_syfs's ctlr_create file.
85b4aa49 2317 *
435c8667
RL		 2318 * libfcoe's 'create' module parameter is deprecated so some
2319 * consolidation of code can be done when that interface is
2320 * removed.
34f42a07 2321 */
435c8667
RL		 2322static int _fcoe_create(struct net_device *netdev, enum fip_state fip_mode,
2323 enum fcoe_create_link_state link_state)
85b4aa49 2324{
b2085a4e 2325 int rc = 0;
8d55e507 2326 struct fcoe_ctlr_device *ctlr_dev;
619fe4be 2327 struct fcoe_ctlr *ctlr;
030f4e00 2328 struct fcoe_interface *fcoe;
af7f85d9 2329 struct fc_lport *lport;
85b4aa49 2330
dfc1d0fe 2331 mutex_lock(&fcoe_config_mutex);
ee5df628 2332 rtnl_lock();
34ce27bc 2333
85b4aa49
RL		 2334 /* look for existing lport */
2335 if (fcoe_hostlist_lookup(netdev)) {
2336 rc = -EEXIST;
78a58246 2337 goto out_nodev;
85b4aa49 2338 }
85b4aa49 2339
1dd454d9 2340 fcoe = fcoe_interface_create(netdev, fip_mode);
7287fb91
RL		 2341 if (IS_ERR(fcoe)) {
2342 rc = PTR_ERR(fcoe);
78a58246 2343 goto out_nodev;
030f4e00
CL		 2344 }
2345
619fe4be 2346 ctlr = fcoe_to_ctlr(fcoe);
8d55e507
RL		 2347 ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr);
2348 lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0);
af7f85d9 2349 if (IS_ERR(lport)) {
d5488eb9 2350 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
85b4aa49 2351 netdev->name);
85b4aa49 2352 rc = -EIO;
848e7d5b 2353 rtnl_unlock();
2e70e241 2354 fcoe_interface_cleanup(fcoe);
f9c4358e
RL		 2355 mutex_unlock(&fcoe_config_mutex);
2356 fcoe_ctlr_device_delete(ctlr_dev);
2357 goto out;
85b4aa49 2358 }
030f4e00 2359
54b649f8 2360 /* Make this the "master" N_Port */
619fe4be 2361 ctlr->lp = lport;
54b649f8 2362
6f6c2aa3 2363 /* setup DCB priority attributes. */
2364 fcoe_dcb_create(fcoe);
2365
54b649f8
CL		 2366 /* start FIP Discovery and FLOGI */
2367 lport->boot_time = jiffies;
2368 fc_fabric_login(lport);
435c8667
RL		 2369
2370 /*
2371 * If the fcoe_ctlr_device is to be set to DISABLED
2372 * it must be done after the lport is added to the
2373 * hostlist, but before the rtnl_lock is released.
2374 * This is because the rtnl_lock protects the
2375 * hostlist that fcoe_device_notification uses. If
2376 * the FCoE Controller is intended to be created
2377 * DISABLED then 'enabled' needs to be considered
2378 * handling link events. 'enabled' must be set
2379 * before the lport can be found in the hostlist
2380 * when a link up event is received.
2381 */
2382 if (link_state == FCOE_CREATE_LINK_UP)
2383 ctlr_dev->enabled = FCOE_CTLR_ENABLED;
2384 else
2385 ctlr_dev->enabled = FCOE_CTLR_DISABLED;
2386
2387 if (link_state == FCOE_CREATE_LINK_UP &&
2388 !fcoe_link_ok(lport)) {
22805123 2389 rtnl_unlock();
619fe4be 2390 fcoe_ctlr_link_up(ctlr);
22805123
RL		 2391 mutex_unlock(&fcoe_config_mutex);
2392 return rc;
2393 }
030f4e00 2394
85b4aa49 2395out_nodev:
34ce27bc 2396 rtnl_unlock();
dfc1d0fe 2397 mutex_unlock(&fcoe_config_mutex);
f9c4358e 2398out:
85b4aa49
RL		 2399 return rc;
2400}
2401
435c8667
RL		 2402/**
2403 * fcoe_create() - Create a fcoe interface
2404 * @netdev : The net_device object the Ethernet interface to create on
2405 * @fip_mode: The FIP mode for this creation
2406 *
2407 * Called from fcoe transport
2408 *
2409 * Returns: 0 for success
2410 */
2411static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode)
2412{
2413 return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP);
2414}
2415
2416/**
2417 * fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs
2418 * @netdev: The net_device to be used by the allocated FCoE Controller
2419 *
2420 * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr
2421 * in a link_down state. The allows the user an opportunity to configure
2422 * the FCoE Controller from sysfs before enabling the FCoE Controller.
2423 *
2424 * Creating in with this routine starts the FCoE Controller in Fabric
2425 * mode. The user can change to VN2VN or another mode before enabling.
2426 */
2427static int fcoe_ctlr_alloc(struct net_device *netdev)
2428{
2429 return _fcoe_create(netdev, FIP_MODE_FABRIC,
2430 FCOE_CREATE_LINK_DOWN);
2431}
2432
5e4f8fe7
RL		 2433/**
2434 * fcoe_link_ok() - Check if the link is OK for a local port
2435 * @lport: The local port to check link on
2436 *
2437 * Returns: 0 if link is UP and OK, -1 if not
2438 *
2439 */
7c9c6841 2440static int fcoe_link_ok(struct fc_lport *lport)
5e4f8fe7 2441{
8597ae8b 2442 struct net_device *netdev = fcoe_netdev(lport);
5e4f8fe7
RL		 2443
2444 if (netif_oper_up(netdev))
2445 return 0;
2446 return -1;
2447}
2448
34f42a07 2449/**
1875f27e
RL		 2450 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2451 * @lport: The local port whose skbs are to be cleared
e7a51997
JE		 2452 *
2453 * Must be called with fcoe_create_mutex held to single-thread completion.
2454 *
2455 * This flushes the pending skbs by adding a new skb to each queue and
2456 * waiting until they are all freed. This assures us that not only are
2457 * there no packets that will be handled by the lport, but also that any
2458 * threads already handling packet have returned.
85b4aa49 2459 */
7c9c6841 2460static void fcoe_percpu_clean(struct fc_lport *lport)
85b4aa49 2461{
85b4aa49 2462 struct fcoe_percpu_s *pp;
dd060e74 2463 struct sk_buff *skb;
5e5e92df 2464 unsigned int cpu;
85b4aa49 2465
5e5e92df
RL		 2466 for_each_possible_cpu(cpu) {
2467 pp = &per_cpu(fcoe_percpu, cpu);
e7a51997 2468
dd060e74 2469 if (!pp->thread || !cpu_online(cpu))
e7a51997 2470 continue;
e7a51997
JE		 2471
2472 skb = dev_alloc_skb(0);
b3b8abd8 2473 if (!skb)
e7a51997 2474 continue;
b3b8abd8 2475
e7a51997
JE		 2476 skb->destructor = fcoe_percpu_flush_done;
2477
dd060e74 2478 spin_lock_bh(&pp->fcoe_rx_list.lock);
e7a51997
JE		 2479 __skb_queue_tail(&pp->fcoe_rx_list, skb);
2480 if (pp->fcoe_rx_list.qlen == 1)
2481 wake_up_process(pp->thread);
5e5e92df 2482 spin_unlock_bh(&pp->fcoe_rx_list.lock);
e7a51997
JE		 2483
2484 wait_for_completion(&fcoe_flush_completion);
85b4aa49
RL		 2485 }
2486}
85b4aa49 2487
34f42a07 2488/**
1875f27e
RL		 2489 * fcoe_reset() - Reset a local port
2490 * @shost: The SCSI host associated with the local port to be reset
85b4aa49 2491 *
1875f27e 2492 * Returns: Always 0 (return value required by FC transport template)
85b4aa49 2493 */
7c9c6841 2494static int fcoe_reset(struct Scsi_Host *shost)
85b4aa49
RL		 2495{
2496 struct fc_lport *lport = shost_priv(shost);
d2f80952
VD		 2497 struct fcoe_port *port = lport_priv(lport);
2498 struct fcoe_interface *fcoe = port->priv;
619fe4be 2499 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
435c8667 2500 struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
d2f80952 2501
619fe4be
RL		 2502 fcoe_ctlr_link_down(ctlr);
2503 fcoe_clean_pending_queue(ctlr->lp);
435c8667
RL		 2504
2505 if (cdev->enabled != FCOE_CTLR_DISABLED &&
2506 !fcoe_link_ok(ctlr->lp))
619fe4be 2507 fcoe_ctlr_link_up(ctlr);
85b4aa49
RL		 2508 return 0;
2509}
85b4aa49 2510
34f42a07 2511/**
1875f27e
RL		 2512 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2513 * @netdev: The net device used as a key
85b4aa49 2514 *
1875f27e
RL		 2515 * Locking: Must be called with the RNL mutex held.
2516 *
2517 * Returns: NULL or the FCoE interface
85b4aa49 2518 */
014f5c3f 2519static struct fcoe_interface *
1875f27e 2520fcoe_hostlist_lookup_port(const struct net_device *netdev)
85b4aa49 2521{
014f5c3f 2522 struct fcoe_interface *fcoe;
85b4aa49 2523
014f5c3f 2524 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1875f27e 2525 if (fcoe->netdev == netdev)
014f5c3f 2526 return fcoe;
85b4aa49 2527 }
85b4aa49
RL		 2528 return NULL;
2529}
2530
34f42a07 2531/**
1875f27e
RL		 2532 * fcoe_hostlist_lookup() - Find the local port associated with a
2533 * given net device
2534 * @netdev: The netdevice used as a key
85b4aa49 2535 *
1875f27e
RL		 2536 * Locking: Must be called with the RTNL mutex held
2537 *
2538 * Returns: NULL or the local port
85b4aa49 2539 */
090eb6c4 2540static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
85b4aa49 2541{
619fe4be 2542 struct fcoe_ctlr *ctlr;
014f5c3f 2543 struct fcoe_interface *fcoe;
85b4aa49 2544
014f5c3f 2545 fcoe = fcoe_hostlist_lookup_port(netdev);
619fe4be
RL		 2546 ctlr = fcoe_to_ctlr(fcoe);
2547 return (fcoe) ? ctlr->lp : NULL;
85b4aa49 2548}
85b4aa49 2549
34f42a07 2550/**
1875f27e
RL		 2551 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2552 * port to the hostlist
2553 * @lport: The local port that identifies the FCoE interface to be added
85b4aa49 2554 *
090eb6c4 2555 * Locking: must be called with the RTNL mutex held
1875f27e
RL		 2556 *
2557 * Returns: 0 for success
85b4aa49 2558 */
090eb6c4 2559static int fcoe_hostlist_add(const struct fc_lport *lport)
85b4aa49 2560{
014f5c3f
CL		 2561 struct fcoe_interface *fcoe;
2562 struct fcoe_port *port;
2563
2564 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2565 if (!fcoe) {
2566 port = lport_priv(lport);
8597ae8b 2567 fcoe = port->priv;
014f5c3f 2568 list_add_tail(&fcoe->list, &fcoe_hostlist);
85b4aa49
RL		 2569 }
2570 return 0;
2571}
85b4aa49 2572
f9184df3
NH		 2573/**
2574 * fcoe_hostlist_del() - Remove the FCoE interface identified by a local
2575 * port to the hostlist
2576 * @lport: The local port that identifies the FCoE interface to be added
2577 *
2578 * Locking: must be called with the RTNL mutex held
2579 *
2580 */
2581static void fcoe_hostlist_del(const struct fc_lport *lport)
2582{
2583 struct fcoe_interface *fcoe;
2584 struct fcoe_port *port;
2585
2586 port = lport_priv(lport);
2587 fcoe = port->priv;
2588 list_del(&fcoe->list);
2589 return;
2590}
78a58246
YZ		 2591
2592static struct fcoe_transport fcoe_sw_transport = {
2593 .name = {FCOE_TRANSPORT_DEFAULT},
2594 .attached = false,
2595 .list = LIST_HEAD_INIT(fcoe_sw_transport.list),
2596 .match = fcoe_match,
435c8667 2597 .alloc = fcoe_ctlr_alloc,
78a58246
YZ		 2598 .create = fcoe_create,
2599 .destroy = fcoe_destroy,
2600 .enable = fcoe_enable,
2601 .disable = fcoe_disable,
2602};
2603
85b4aa49 2604/**
1875f27e 2605 * fcoe_init() - Initialize fcoe.ko
85b4aa49 2606 *
1875f27e 2607 * Returns: 0 on success, or a negative value on failure
34f42a07 2608 */
85b4aa49
RL		 2609static int __init fcoe_init(void)
2610{
1875f27e 2611 struct fcoe_percpu_s *p;
38eccabd 2612 unsigned int cpu;
8976f424 2613 int rc = 0;
85b4aa49 2614
2ca32b48
TH		 2615 fcoe_wq = alloc_workqueue("fcoe", 0, 0);
2616 if (!fcoe_wq)
2617 return -ENOMEM;
2618
78a58246
YZ		 2619 /* register as a fcoe transport */
2620 rc = fcoe_transport_attach(&fcoe_sw_transport);
2621 if (rc) {
2622 printk(KERN_ERR "failed to register an fcoe transport, check "
2623 "if libfcoe is loaded\n");
2624 return rc;
2625 }
2626
dfc1d0fe
CL		 2627 mutex_lock(&fcoe_config_mutex);
2628
38eccabd 2629 for_each_possible_cpu(cpu) {
5e5e92df 2630 p = &per_cpu(fcoe_percpu, cpu);
38eccabd
RL		 2631 skb_queue_head_init(&p->fcoe_rx_list);
2632 }
2633
cd45ae38
SB		 2634 cpu_notifier_register_begin();
2635
8976f424
RL		 2636 for_each_online_cpu(cpu)
2637 fcoe_percpu_thread_create(cpu);
85b4aa49 2638
8976f424 2639 /* Initialize per CPU interrupt thread */
cd45ae38 2640 rc = __register_hotcpu_notifier(&fcoe_cpu_notifier);
8976f424
RL		 2641 if (rc)
2642 goto out_free;
85b4aa49 2643
cd45ae38
SB		 2644 cpu_notifier_register_done();
2645
8976f424 2646 /* Setup link change notification */
85b4aa49
RL		 2647 fcoe_dev_setup();
2648
5892c32f
CL		 2649 rc = fcoe_if_init();
2650 if (rc)
2651 goto out_free;
85b4aa49 2652
dfc1d0fe 2653 mutex_unlock(&fcoe_config_mutex);
85b4aa49 2654 return 0;
8976f424
RL		 2655
2656out_free:
2657 for_each_online_cpu(cpu) {
2658 fcoe_percpu_thread_destroy(cpu);
2659 }
cd45ae38
SB		 2660
2661 cpu_notifier_register_done();
2662
dfc1d0fe 2663 mutex_unlock(&fcoe_config_mutex);
2ca32b48 2664 destroy_workqueue(fcoe_wq);
8976f424 2665 return rc;
85b4aa49
RL		 2666}
2667module_init(fcoe_init);
2668
2669/**
1875f27e 2670 * fcoe_exit() - Clean up fcoe.ko
85b4aa49 2671 *
1875f27e 2672 * Returns: 0 on success or a negative value on failure
34f42a07 2673 */
85b4aa49
RL		 2674static void __exit fcoe_exit(void)
2675{
014f5c3f 2676 struct fcoe_interface *fcoe, *tmp;
619fe4be 2677 struct fcoe_ctlr *ctlr;
2e70e241 2678 struct fcoe_port *port;
1875f27e 2679 unsigned int cpu;
85b4aa49 2680
dfc1d0fe
CL		 2681 mutex_lock(&fcoe_config_mutex);
2682
85b4aa49
RL		 2683 fcoe_dev_cleanup();
2684
5919a595 2685 /* releases the associated fcoe hosts */
090eb6c4
CL		 2686 rtnl_lock();
2687 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
619fe4be
RL		 2688 ctlr = fcoe_to_ctlr(fcoe);
2689 port = lport_priv(ctlr->lp);
f9184df3 2690 fcoe_hostlist_del(port->lport);
2ca32b48 2691 queue_work(fcoe_wq, &port->destroy_work);
c863df33 2692 }
090eb6c4 2693 rtnl_unlock();
85b4aa49 2694
cd45ae38 2695 cpu_notifier_register_begin();
8976f424 2696
014f5c3f 2697 for_each_online_cpu(cpu)
8976f424 2698 fcoe_percpu_thread_destroy(cpu);
85b4aa49 2699
cd45ae38
SB		 2700 __unregister_hotcpu_notifier(&fcoe_cpu_notifier);
2701
2702 cpu_notifier_register_done();
2703
dfc1d0fe 2704 mutex_unlock(&fcoe_config_mutex);
2e70e241 2705
2ca32b48
TH		 2706 /*
2707 * destroy_work's may be chained but destroy_workqueue()
2708 * can take care of them. Just kill the fcoe_wq.
2709 */
2710 destroy_workqueue(fcoe_wq);
2e70e241 2711
2ca32b48
TH		 2712 /*
2713 * Detaching from the scsi transport must happen after all
2714 * destroys are done on the fcoe_wq. destroy_workqueue will
2715 * enusre the fcoe_wq is flushed.
2716 */
2e70e241 2717 fcoe_if_exit();
78a58246
YZ		 2718
2719 /* detach from fcoe transport */
2720 fcoe_transport_detach(&fcoe_sw_transport);
85b4aa49
RL		 2721}
2722module_exit(fcoe_exit);
11b56188
CL		 2723
2724/**
2725 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2726 * @seq: active sequence in the FLOGI or FDISC exchange
2727 * @fp: response frame, or error encoded in a pointer (timeout)
2728 * @arg: pointer the the fcoe_ctlr structure
2729 *
65155b37 2730 * This handles MAC address management for FCoE, then passes control on to
11b56188
CL		 2731 * the libfc FLOGI response handler.
2732 */
2733static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2734{
2735 struct fcoe_ctlr *fip = arg;
2736 struct fc_exch *exch = fc_seq_exch(seq);
2737 struct fc_lport *lport = exch->lp;
2738 u8 *mac;
2739
2740 if (IS_ERR(fp))
2741 goto done;
2742
2743 mac = fr_cb(fp)->granted_mac;
907c07d4
VD		 2744 /* pre-FIP */
2745 if (is_zero_ether_addr(mac))
2746 fcoe_ctlr_recv_flogi(fip, lport, fp);
2747 if (!is_zero_ether_addr(mac))
2748 fcoe_update_src_mac(lport, mac);
11b56188
CL		 2749done:
2750 fc_lport_flogi_resp(seq, fp, lport);
2751}
2752
2753/**
2754 * fcoe_logo_resp() - FCoE specific LOGO response handler
2755 * @seq: active sequence in the LOGO exchange
2756 * @fp: response frame, or error encoded in a pointer (timeout)
2757 * @arg: pointer the the fcoe_ctlr structure
2758 *
65155b37 2759 * This handles MAC address management for FCoE, then passes control on to
11b56188
CL		 2760 * the libfc LOGO response handler.
2761 */
2762static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2763{
386309ce 2764 struct fc_lport *lport = arg;
11b56188
CL		 2765 static u8 zero_mac[ETH_ALEN] = { 0 };
2766
2767 if (!IS_ERR(fp))
386309ce 2768 fcoe_update_src_mac(lport, zero_mac);
11b56188
CL		 2769 fc_lport_logo_resp(seq, fp, lport);
2770}
2771
2772/**
2773 * fcoe_elsct_send - FCoE specific ELS handler
2774 *
2775 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2776 * using FCoE specific response handlers and passing the FIP controller as
2777 * the argument (the lport is still available from the exchange).
2778 *
2779 * Most of the work here is just handed off to the libfc routine.
2780 */
1875f27e
RL		 2781static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2782 struct fc_frame *fp, unsigned int op,
2783 void (*resp)(struct fc_seq *,
2784 struct fc_frame *,
2785 void *),
2786 void *arg, u32 timeout)
11b56188
CL		 2787{
2788 struct fcoe_port *port = lport_priv(lport);
8597ae8b 2789 struct fcoe_interface *fcoe = port->priv;
619fe4be 2790 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
11b56188
CL		 2791 struct fc_frame_header *fh = fc_frame_header_get(fp);
2792
2793 switch (op) {
2794 case ELS_FLOGI:
2795 case ELS_FDISC:
e10f8c66
JE		 2796 if (lport->point_to_multipoint)
2797 break;
11b56188
CL		 2798 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2799 fip, timeout);
2800 case ELS_LOGO:
2801 /* only hook onto fabric logouts, not port logouts */
2802 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2803 break;
2804 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
386309ce 2805 lport, timeout);
11b56188
CL		 2806 }
2807 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2808}
2809
9a05753b
CL		 2810/**
2811 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2812 * @vport: fc_vport object to create a new fc_host for
2813 * @disabled: start the new fc_host in a disabled state by default?
2814 *
2815 * Returns: 0 for success
2816 */
2817static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2818{
2819 struct Scsi_Host *shost = vport_to_shost(vport);
2820 struct fc_lport *n_port = shost_priv(shost);
2821 struct fcoe_port *port = lport_priv(n_port);
8597ae8b 2822 struct fcoe_interface *fcoe = port->priv;
9a05753b
CL		 2823 struct net_device *netdev = fcoe->netdev;
2824 struct fc_lport *vn_port;
bdf25218
NP		 2825 int rc;
2826 char buf[32];
2827
2828 rc = fcoe_validate_vport_create(vport);
2829 if (rc) {
d834895c 2830 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
bdf25218
NP		 2831 printk(KERN_ERR "fcoe: Failed to create vport, "
2832 "WWPN (0x%s) already exists\n",
2833 buf);
2834 return rc;
2835 }
9a05753b
CL		 2836
2837 mutex_lock(&fcoe_config_mutex);
4bc71cb9 2838 rtnl_lock();
9a05753b 2839 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
4bc71cb9 2840 rtnl_unlock();
9a05753b
CL		 2841 mutex_unlock(&fcoe_config_mutex);
2842
2843 if (IS_ERR(vn_port)) {
2844 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2845 netdev->name);
2846 return -EIO;
2847 }
2848
2849 if (disabled) {
2850 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2851 } else {
2852 vn_port->boot_time = jiffies;
2853 fc_fabric_login(vn_port);
2854 fc_vport_setlink(vn_port);
2855 }
2856 return 0;
2857}
2858
2859/**
2860 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2861 * @vport: fc_vport object that is being destroyed
2862 *
2863 * Returns: 0 for success
2864 */
2865static int fcoe_vport_destroy(struct fc_vport *vport)
2866{
2867 struct Scsi_Host *shost = vport_to_shost(vport);
2868 struct fc_lport *n_port = shost_priv(shost);
2869 struct fc_lport *vn_port = vport->dd_data;
9a05753b
CL		 2870
2871 mutex_lock(&n_port->lp_mutex);
2872 list_del(&vn_port->list);
2873 mutex_unlock(&n_port->lp_mutex);
ccefd23e
RL		 2874
2875 mutex_lock(&fcoe_config_mutex);
2876 fcoe_if_destroy(vn_port);
2877 mutex_unlock(&fcoe_config_mutex);
2878
9a05753b
CL		 2879 return 0;
2880}
2881
2882/**
2883 * fcoe_vport_disable() - change vport state
2884 * @vport: vport to bring online/offline
2885 * @disable: should the vport be disabled?
2886 */
2887static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2888{
2889 struct fc_lport *lport = vport->dd_data;
2890
2891 if (disable) {
2892 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2893 fc_fabric_logoff(lport);
2894 } else {
2895 lport->boot_time = jiffies;
2896 fc_fabric_login(lport);
2897 fc_vport_setlink(lport);
2898 }
2899
2900 return 0;
2901}
2902
dc8596d3
CL		 2903/**
2904 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2905 * @vport: fc_vport with a new symbolic name string
2906 *
2907 * After generating a new symbolic name string, a new RSPN_ID request is
2908 * sent to the name server. There is no response handler, so if it fails
2909 * for some reason it will not be retried.
2910 */
2911static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2912{
2913 struct fc_lport *lport = vport->dd_data;
2914 struct fc_frame *fp;
2915 size_t len;
2916
2917 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2918 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2919 fcoe_netdev(lport)->name, vport->symbolic_name);
2920
2921 if (lport->state != LPORT_ST_READY)
2922 return;
2923
2924 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2925 fp = fc_frame_alloc(lport,
2926 sizeof(struct fc_ct_hdr) +
2927 sizeof(struct fc_ns_rspn) + len);
2928 if (!fp)
2929 return;
2930 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
b94f8951 2931 NULL, NULL, 3 * lport->r_a_tov);
dc8596d3 2932}
b84056bf 2933
8d55e507
RL		 2934static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev)
2935{
2936 struct fcoe_ctlr_device *ctlr_dev =
2937 fcoe_fcf_dev_to_ctlr_dev(fcf_dev);
2938 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
2939 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);
2940
2941 fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev);
2942}
2943
7d65b0df
JE		 2944/**
2945 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2946 * @lport: the local port
2947 * @port_id: the port ID
2948 * @fp: the received frame, if any, that caused the port_id to be set.
2949 *
2950 * This routine handles the case where we received a FLOGI and are
2951 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2952 * so it can set the non-mapped mode and gateway address.
2953 *
2954 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2955 */
2956static void fcoe_set_port_id(struct fc_lport *lport,
2957 u32 port_id, struct fc_frame *fp)
2958{
2959 struct fcoe_port *port = lport_priv(lport);
8597ae8b 2960 struct fcoe_interface *fcoe = port->priv;
619fe4be 2961 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
7d65b0df
JE		 2962
2963 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
619fe4be 2964 fcoe_ctlr_recv_flogi(ctlr, lport, fp);
7d65b0df 2965}
Linux kernel - Deliverables
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