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Merge tag 'pm+acpi-4.6-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
[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,
c40ecc12 290 .track_queue_depth = 1,
7f349142
VD		 291};
292
54b649f8 293/**
1875f27e
RL		 294 * fcoe_interface_setup() - Setup a FCoE interface
295 * @fcoe: The new FCoE interface
296 * @netdev: The net device that the fcoe interface is on
54b649f8
CL		 297 *
298 * Returns : 0 for success
2e70e241 299 * Locking: must be called with the RTNL mutex held
54b649f8
CL		 300 */
301static int fcoe_interface_setup(struct fcoe_interface *fcoe,
302 struct net_device *netdev)
303{
619fe4be 304 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
54b649f8 305 struct netdev_hw_addr *ha;
5bab87e6 306 struct net_device *real_dev;
54b649f8 307 u8 flogi_maddr[ETH_ALEN];
b7a727f1 308 const struct net_device_ops *ops;
54b649f8
CL		 309
310 fcoe->netdev = netdev;
311
b7a727f1
YZ		 312 /* Let LLD initialize for FCoE */
313 ops = netdev->netdev_ops;
314 if (ops->ndo_fcoe_enable) {
315 if (ops->ndo_fcoe_enable(netdev))
316 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
317 " specific feature for LLD.\n");
318 }
319
54b649f8 320 /* Do not support for bonding device */
cc8bdf06 321 if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) {
59d92516 322 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
54b649f8
CL		 323 return -EOPNOTSUPP;
324 }
325
326 /* look for SAN MAC address, if multiple SAN MACs exist, only
327 * use the first one for SPMA */
5bab87e6
YZ		 328 real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ?
329 vlan_dev_real_dev(netdev) : netdev;
d1483bb9 330 fcoe->realdev = real_dev;
54b649f8 331 rcu_read_lock();
5bab87e6 332 for_each_dev_addr(real_dev, ha) {
54b649f8 333 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
bf361707 334 (is_valid_ether_addr(ha->addr))) {
54b649f8
CL		 335 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
336 fip->spma = 1;
337 break;
338 }
339 }
340 rcu_read_unlock();
341
342 /* setup Source Mac Address */
343 if (!fip->spma)
344 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
345
346 /*
347 * Add FCoE MAC address as second unicast MAC address
348 * or enter promiscuous mode if not capable of listening
349 * for multiple unicast MACs.
350 */
54b649f8 351 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
a748ee24 352 dev_uc_add(netdev, flogi_maddr);
54b649f8 353 if (fip->spma)
a748ee24 354 dev_uc_add(netdev, fip->ctl_src_addr);
e10f8c66
JE		 355 if (fip->mode == FIP_MODE_VN2VN) {
356 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS);
357 dev_mc_add(netdev, FIP_ALL_P2P_MACS);
358 } else
359 dev_mc_add(netdev, FIP_ALL_ENODE_MACS);
54b649f8
CL		 360
361 /*
362 * setup the receive function from ethernet driver
363 * on the ethertype for the given device
364 */
365 fcoe->fcoe_packet_type.func = fcoe_rcv;
420fa211 366 fcoe->fcoe_packet_type.type = htons(ETH_P_FCOE);
54b649f8
CL		 367 fcoe->fcoe_packet_type.dev = netdev;
368 dev_add_pack(&fcoe->fcoe_packet_type);
369
370 fcoe->fip_packet_type.func = fcoe_fip_recv;
371 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
372 fcoe->fip_packet_type.dev = netdev;
373 dev_add_pack(&fcoe->fip_packet_type);
374
375 return 0;
376}
377
030f4e00 378/**
1875f27e
RL		 379 * fcoe_interface_create() - Create a FCoE interface on a net device
380 * @netdev: The net device to create the FCoE interface on
1dd454d9 381 * @fip_mode: The mode to use for FIP
030f4e00
CL		 382 *
383 * Returns: pointer to a struct fcoe_interface or NULL on error
384 */
1dd454d9
JE		 385static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
386 enum fip_state fip_mode)
030f4e00 387{
8d55e507 388 struct fcoe_ctlr_device *ctlr_dev;
619fe4be 389 struct fcoe_ctlr *ctlr;
030f4e00 390 struct fcoe_interface *fcoe;
619fe4be 391 int size;
59d92516 392 int err;
030f4e00 393
7287fb91
RL		 394 if (!try_module_get(THIS_MODULE)) {
395 FCOE_NETDEV_DBG(netdev,
396 "Could not get a reference to the module\n");
397 fcoe = ERR_PTR(-EBUSY);
398 goto out;
399 }
400
619fe4be 401 size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface);
8d55e507
RL		 402 ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ,
403 size);
404 if (!ctlr_dev) {
405 FCOE_DBG("Failed to add fcoe_ctlr_device\n");
7287fb91 406 fcoe = ERR_PTR(-ENOMEM);
6f68794c 407 goto out_putmod;
030f4e00
CL		 408 }
409
8d55e507 410 ctlr = fcoe_ctlr_device_priv(ctlr_dev);
9d34876f 411 ctlr->cdev = ctlr_dev;
8d55e507
RL		 412 fcoe = fcoe_ctlr_priv(ctlr);
413
2e70e241 414 dev_hold(netdev);
54b649f8
CL		 415
416 /*
417 * Initialize FIP.
418 */
619fe4be
RL		 419 fcoe_ctlr_init(ctlr, fip_mode);
420 ctlr->send = fcoe_fip_send;
421 ctlr->update_mac = fcoe_update_src_mac;
422 ctlr->get_src_addr = fcoe_get_src_mac;
54b649f8 423
59d92516 424 err = fcoe_interface_setup(fcoe, netdev);
425 if (err) {
619fe4be 426 fcoe_ctlr_destroy(ctlr);
8d55e507 427 fcoe_ctlr_device_delete(ctlr_dev);
59d92516 428 dev_put(netdev);
7287fb91 429 fcoe = ERR_PTR(err);
6f68794c 430 goto out_putmod;
59d92516 431 }
030f4e00 432
7287fb91
RL		 433 goto out;
434
6f68794c 435out_putmod:
7287fb91
RL		 436 module_put(THIS_MODULE);
437out:
030f4e00
CL		 438 return fcoe;
439}
440
54b649f8 441/**
433eba04 442 * fcoe_interface_remove() - remove FCoE interface from netdev
1875f27e 443 * @fcoe: The FCoE interface to be cleaned up
2e70e241
CL		 444 *
445 * Caller must be holding the RTNL mutex
54b649f8 446 */
433eba04 447static void fcoe_interface_remove(struct fcoe_interface *fcoe)
54b649f8
CL		 448{
449 struct net_device *netdev = fcoe->netdev;
619fe4be 450 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
54b649f8 451 u8 flogi_maddr[ETH_ALEN];
b7a727f1 452 const struct net_device_ops *ops;
54b649f8
CL		 453
454 /*
455 * Don't listen for Ethernet packets anymore.
456 * synchronize_net() ensures that the packet handlers are not running
457 * on another CPU. dev_remove_pack() would do that, this calls the
458 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
459 */
460 __dev_remove_pack(&fcoe->fcoe_packet_type);
461 __dev_remove_pack(&fcoe->fip_packet_type);
462 synchronize_net();
463
54b649f8 464 /* Delete secondary MAC addresses */
54b649f8 465 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
a748ee24 466 dev_uc_del(netdev, flogi_maddr);
54b649f8 467 if (fip->spma)
a748ee24 468 dev_uc_del(netdev, fip->ctl_src_addr);
e10f8c66
JE		 469 if (fip->mode == FIP_MODE_VN2VN) {
470 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);
471 dev_mc_del(netdev, FIP_ALL_P2P_MACS);
472 } else
473 dev_mc_del(netdev, FIP_ALL_ENODE_MACS);
b7a727f1
YZ		 474
475 /* Tell the LLD we are done w/ FCoE */
476 ops = netdev->netdev_ops;
477 if (ops->ndo_fcoe_disable) {
478 if (ops->ndo_fcoe_disable(netdev))
479 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
480 " specific feature for LLD.\n");
481 }
433eba04
VD		 482 fcoe->removed = 1;
483}
484
485
486/**
487 * fcoe_interface_cleanup() - Clean up a FCoE interface
488 * @fcoe: The FCoE interface to be cleaned up
489 */
490static void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
491{
492 struct net_device *netdev = fcoe->netdev;
619fe4be 493 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
b2085a4e 494
433eba04
VD		 495 rtnl_lock();
496 if (!fcoe->removed)
497 fcoe_interface_remove(fcoe);
848e7d5b
RL		 498 rtnl_unlock();
499
b2085a4e 500 /* Release the self-reference taken during fcoe_interface_create() */
1a8ef414
RL		 501 /* tear-down the FCoE controller */
502 fcoe_ctlr_destroy(fip);
619fe4be 503 scsi_host_put(fip->lp->host);
1a8ef414
RL		 504 dev_put(netdev);
505 module_put(THIS_MODULE);
030f4e00
CL		 506}
507
ab6b85c1 508/**
1875f27e
RL		 509 * fcoe_fip_recv() - Handler for received FIP frames
510 * @skb: The receive skb
511 * @netdev: The associated net device
512 * @ptype: The packet_type structure which was used to register this handler
513 * @orig_dev: The original net_device the the skb was received on.
514 * (in case dev is a bond)
ab6b85c1
VD		 515 *
516 * Returns: 0 for success
517 */
1875f27e 518static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
ab6b85c1
VD		 519 struct packet_type *ptype,
520 struct net_device *orig_dev)
521{
259ad85d 522 struct fcoe_interface *fcoe;
619fe4be 523 struct fcoe_ctlr *ctlr;
ab6b85c1 524
259ad85d 525 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
619fe4be
RL		 526 ctlr = fcoe_to_ctlr(fcoe);
527 fcoe_ctlr_recv(ctlr, skb);
ab6b85c1
VD		 528 return 0;
529}
530
980f5156
VD		 531/**
532 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame
533 * @port: The FCoE port
534 * @skb: The FIP/FCoE packet to be sent
535 */
536static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb)
537{
538 if (port->fcoe_pending_queue.qlen)
539 fcoe_check_wait_queue(port->lport, skb);
540 else if (fcoe_start_io(skb))
541 fcoe_check_wait_queue(port->lport, skb);
542}
543
ab6b85c1 544/**
1875f27e
RL		 545 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
546 * @fip: The FCoE controller
547 * @skb: The FIP packet to be sent
ab6b85c1
VD		 548 */
549static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
550{
3fe9a0ba 551 skb->dev = fcoe_from_ctlr(fip)->netdev;
980f5156 552 fcoe_port_send(lport_priv(fip->lp), skb);
ab6b85c1
VD		 553}
554
555/**
1875f27e
RL		 556 * fcoe_update_src_mac() - Update the Ethernet MAC filters
557 * @lport: The local port to update the source MAC on
558 * @addr: Unicast MAC address to add
ab6b85c1
VD		 559 *
560 * Remove any previously-set unicast MAC filter.
561 * Add secondary FCoE MAC address filter for our OUI.
562 */
11b56188 563static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
ab6b85c1 564{
11b56188 565 struct fcoe_port *port = lport_priv(lport);
8597ae8b 566 struct fcoe_interface *fcoe = port->priv;
25024989 567
11b56188 568 if (!is_zero_ether_addr(port->data_src_addr))
a748ee24 569 dev_uc_del(fcoe->netdev, port->data_src_addr);
11b56188 570 if (!is_zero_ether_addr(addr))
a748ee24 571 dev_uc_add(fcoe->netdev, addr);
11b56188 572 memcpy(port->data_src_addr, addr, ETH_ALEN);
ab6b85c1
VD		 573}
574
11b56188
CL		 575/**
576 * fcoe_get_src_mac() - return the Ethernet source address for an lport
577 * @lport: libfc lport
578 */
579static u8 *fcoe_get_src_mac(struct fc_lport *lport)
580{
581 struct fcoe_port *port = lport_priv(lport);
582
583 return port->data_src_addr;
584}
585
7f349142 586/**
1875f27e
RL		 587 * fcoe_lport_config() - Set up a local port
588 * @lport: The local port to be setup
7f349142
VD		 589 *
590 * Returns: 0 for success
591 */
1875f27e 592static int fcoe_lport_config(struct fc_lport *lport)
7f349142 593{
1875f27e
RL		 594 lport->link_up = 0;
595 lport->qfull = 0;
596 lport->max_retry_count = 3;
597 lport->max_rport_retry_count = 3;
598 lport->e_d_tov = 2 * 1000; /* FC-FS default */
599 lport->r_a_tov = 2 * 2 * 1000;
600 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
601 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
602 lport->does_npiv = 1;
603
604 fc_lport_init_stats(lport);
7f349142
VD		 605
606 /* lport fc_lport related configuration */
1875f27e 607 fc_lport_config(lport);
7f349142
VD		 608
609 /* offload related configuration */
1875f27e
RL		 610 lport->crc_offload = 0;
611 lport->seq_offload = 0;
612 lport->lro_enabled = 0;
613 lport->lro_xid = 0;
614 lport->lso_max = 0;
7f349142
VD		 615
616 return 0;
617}
618
54a5b21d
YZ		 619/**
620 * fcoe_netdev_features_change - Updates the lport's offload flags based
621 * on the LLD netdev's FCoE feature flags
622 */
623static void fcoe_netdev_features_change(struct fc_lport *lport,
624 struct net_device *netdev)
625{
626 mutex_lock(&lport->lp_mutex);
627
628 if (netdev->features & NETIF_F_SG)
629 lport->sg_supp = 1;
630 else
631 lport->sg_supp = 0;
632
633 if (netdev->features & NETIF_F_FCOE_CRC) {
634 lport->crc_offload = 1;
635 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
636 } else {
637 lport->crc_offload = 0;
638 }
639
640 if (netdev->features & NETIF_F_FSO) {
641 lport->seq_offload = 1;
642 lport->lso_max = netdev->gso_max_size;
643 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
644 lport->lso_max);
645 } else {
646 lport->seq_offload = 0;
647 lport->lso_max = 0;
648 }
649
650 if (netdev->fcoe_ddp_xid) {
651 lport->lro_enabled = 1;
652 lport->lro_xid = netdev->fcoe_ddp_xid;
653 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
654 lport->lro_xid);
655 } else {
656 lport->lro_enabled = 0;
657 lport->lro_xid = 0;
658 }
659
660 mutex_unlock(&lport->lp_mutex);
661}
662
7f349142 663/**
1875f27e
RL		 664 * fcoe_netdev_config() - Set up net devive for SW FCoE
665 * @lport: The local port that is associated with the net device
666 * @netdev: The associated net device
7f349142 667 *
1875f27e 668 * Must be called after fcoe_lport_config() as it will use local port mutex
7f349142 669 *
1875f27e 670 * Returns: 0 for success
7f349142 671 */
1875f27e 672static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
7f349142
VD		 673{
674 u32 mfs;
675 u64 wwnn, wwpn;
25024989 676 struct fcoe_interface *fcoe;
619fe4be 677 struct fcoe_ctlr *ctlr;
014f5c3f 678 struct fcoe_port *port;
7f349142
VD		 679
680 /* Setup lport private data to point to fcoe softc */
1875f27e 681 port = lport_priv(lport);
8597ae8b 682 fcoe = port->priv;
619fe4be 683 ctlr = fcoe_to_ctlr(fcoe);
7f349142
VD		 684
685 /*
686 * Determine max frame size based on underlying device and optional
687 * user-configured limit. If the MFS is too low, fcoe_link_ok()
688 * will return 0, so do this first.
689 */
7221d7e5
YZ		 690 mfs = netdev->mtu;
691 if (netdev->features & NETIF_F_FCOE_MTU) {
692 mfs = FCOE_MTU;
693 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
694 }
695 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
1875f27e 696 if (fc_set_mfs(lport, mfs))
7f349142
VD		 697 return -EINVAL;
698
7f349142 699 /* offload features support */
54a5b21d 700 fcoe_netdev_features_change(lport, netdev);
7f349142 701
014f5c3f
CL		 702 skb_queue_head_init(&port->fcoe_pending_queue);
703 port->fcoe_pending_queue_active = 0;
1875f27e 704 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
7f349142 705
5e4f8fe7
RL		 706 fcoe_link_speed_update(lport);
707
1875f27e 708 if (!lport->vport) {
dcece412 709 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
619fe4be 710 wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0);
1875f27e 711 fc_set_wwnn(lport, wwnn);
dcece412 712 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
619fe4be 713 wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr,
cf4aebca 714 2, 0);
1875f27e 715 fc_set_wwpn(lport, wwpn);
9a05753b 716 }
7f349142 717
7f349142
VD		 718 return 0;
719}
720
721/**
1875f27e
RL		 722 * fcoe_shost_config() - Set up the SCSI host associated with a local port
723 * @lport: The local port
1875f27e 724 * @dev: The device associated with the SCSI host
7f349142
VD		 725 *
726 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
727 *
1875f27e 728 * Returns: 0 for success
7f349142 729 */
8ba00a4b 730static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)
7f349142
VD		 731{
732 int rc = 0;
733
734 /* lport scsi host config */
1875f27e
RL		 735 lport->host->max_lun = FCOE_MAX_LUN;
736 lport->host->max_id = FCOE_MAX_FCP_TARGET;
737 lport->host->max_channel = 0;
da87bfab
VD		 738 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;
739
1875f27e 740 if (lport->vport)
8ca86f84 741 lport->host->transportt = fcoe_vport_scsi_transport;
e9084bb8 742 else
8ca86f84 743 lport->host->transportt = fcoe_nport_scsi_transport;
7f349142
VD		 744
745 /* add the new host to the SCSI-ml */
1875f27e 746 rc = scsi_add_host(lport->host, dev);
7f349142 747 if (rc) {
1875f27e 748 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
d5488eb9 749 "error on scsi_add_host\n");
7f349142
VD		 750 return rc;
751 }
9a05753b 752
1875f27e 753 if (!lport->vport)
4be929be 754 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
9a05753b 755
1875f27e 756 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
5baa17c3 757 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
1875f27e 758 fcoe_netdev(lport)->name);
7f349142
VD		 759
760 return 0;
761}
762
6fef3902
NP		 763
764/**
765 * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE
766 * @lport: The local port that is associated with the net device
767 * @netdev: The associated net device
768 *
769 * Must be called after fcoe_shost_config() as it will use local port mutex
770 *
771 */
772static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev)
773{
774 struct fcoe_interface *fcoe;
775 struct fcoe_port *port;
776 struct net_device *realdev;
777 int rc;
6fef3902
NP		 778
779 port = lport_priv(lport);
780 fcoe = port->priv;
781 realdev = fcoe->realdev;
782
783 if (!realdev)
784 return;
785
786 /* No FDMI state m/c for NPIV ports */
787 if (lport->vport)
788 return;
789
790 if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) {
f07d46bb
NP		 791 struct netdev_fcoe_hbainfo *fdmi;
792 fdmi = kzalloc(sizeof(*fdmi), GFP_KERNEL);
793 if (!fdmi)
794 return;
795
6fef3902 796 rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev,
f07d46bb 797 fdmi);
6fef3902
NP		 798 if (rc) {
799 printk(KERN_INFO "fcoe: Failed to retrieve FDMI "
800 "information from netdev.\n");
801 return;
802 }
803
804 snprintf(fc_host_serial_number(lport->host),
805 FC_SERIAL_NUMBER_SIZE,
806 "%s",
f07d46bb 807 fdmi->serial_number);
6fef3902
NP		 808 snprintf(fc_host_manufacturer(lport->host),
809 FC_SERIAL_NUMBER_SIZE,
810 "%s",
f07d46bb 811 fdmi->manufacturer);
6fef3902
NP		 812 snprintf(fc_host_model(lport->host),
813 FC_SYMBOLIC_NAME_SIZE,
814 "%s",
f07d46bb 815 fdmi->model);
6fef3902
NP		 816 snprintf(fc_host_model_description(lport->host),
817 FC_SYMBOLIC_NAME_SIZE,
818 "%s",
f07d46bb 819 fdmi->model_description);
6fef3902
NP		 820 snprintf(fc_host_hardware_version(lport->host),
821 FC_VERSION_STRING_SIZE,
822 "%s",
f07d46bb 823 fdmi->hardware_version);
6fef3902
NP		 824 snprintf(fc_host_driver_version(lport->host),
825 FC_VERSION_STRING_SIZE,
826 "%s",
f07d46bb 827 fdmi->driver_version);
6fef3902
NP		 828 snprintf(fc_host_optionrom_version(lport->host),
829 FC_VERSION_STRING_SIZE,
830 "%s",
f07d46bb 831 fdmi->optionrom_version);
6fef3902
NP		 832 snprintf(fc_host_firmware_version(lport->host),
833 FC_VERSION_STRING_SIZE,
834 "%s",
f07d46bb 835 fdmi->firmware_version);
6fef3902
NP		 836
837 /* Enable FDMI lport states */
838 lport->fdmi_enabled = 1;
f07d46bb 839 kfree(fdmi);
6fef3902
NP		 840 } else {
841 lport->fdmi_enabled = 0;
842 printk(KERN_INFO "fcoe: No FDMI support.\n");
843 }
844}
845
1875f27e
RL		 846/**
847 * fcoe_oem_match() - The match routine for the offloaded exchange manager
848 * @fp: The I/O frame
d7179680 849 *
1875f27e
RL		 850 * This routine will be associated with an exchange manager (EM). When
851 * the libfc exchange handling code is looking for an EM to use it will
852 * call this routine and pass it the frame that it wishes to send. This
853 * routine will return True if the associated EM is to be used and False
854 * if the echange code should continue looking for an EM.
855 *
856 * The offload EM that this routine is associated with will handle any
857 * packets that are for SCSI read requests.
858 *
1ff9918b
KP		 859 * This has been enhanced to work when FCoE stack is operating in target
860 * mode.
861 *
1875f27e 862 * Returns: True for read types I/O, otherwise returns false.
d7179680 863 */
7c9c6841 864static bool fcoe_oem_match(struct fc_frame *fp)
d7179680 865{
1ff9918b
KP		 866 struct fc_frame_header *fh = fc_frame_header_get(fp);
867 struct fcp_cmnd *fcp;
868
869 if (fc_fcp_is_read(fr_fsp(fp)) &&
870 (fr_fsp(fp)->data_len > fcoe_ddp_min))
871 return true;
a762dce4
YZ		 872 else if ((fr_fsp(fp) == NULL) &&
873 (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) &&
874 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) {
1ff9918b 875 fcp = fc_frame_payload_get(fp, sizeof(*fcp));
a762dce4
YZ		 876 if ((fcp->fc_flags & FCP_CFL_WRDATA) &&
877 (ntohl(fcp->fc_dl) > fcoe_ddp_min))
1ff9918b
KP		 878 return true;
879 }
880 return false;
d7179680
VD		 881}
882
7f349142 883/**
1875f27e
RL		 884 * fcoe_em_config() - Allocate and configure an exchange manager
885 * @lport: The local port that the new EM will be associated with
7f349142 886 *
1875f27e 887 * Returns: 0 on success
7f349142 888 */
1875f27e 889static inline int fcoe_em_config(struct fc_lport *lport)
7f349142 890{
1875f27e 891 struct fcoe_port *port = lport_priv(lport);
8597ae8b 892 struct fcoe_interface *fcoe = port->priv;
25024989 893 struct fcoe_interface *oldfcoe = NULL;
1d1b88dc 894 struct net_device *old_real_dev, *cur_real_dev;
d7179680
VD		 895 u16 min_xid = FCOE_MIN_XID;
896 u16 max_xid = FCOE_MAX_XID;
897
898 /*
899 * Check if need to allocate an em instance for
900 * offload exchange ids to be shared across all VN_PORTs/lport.
901 */
1875f27e
RL		 902 if (!lport->lro_enabled || !lport->lro_xid ||
903 (lport->lro_xid >= max_xid)) {
904 lport->lro_xid = 0;
d7179680
VD		 905 goto skip_oem;
906 }
907
908 /*
909 * Reuse existing offload em instance in case
1d1b88dc 910 * it is already allocated on real eth device
d7179680 911 */
25024989
CL		 912 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
913 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
1d1b88dc 914 else
25024989 915 cur_real_dev = fcoe->netdev;
1d1b88dc 916
25024989 917 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
25024989
CL		 918 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
919 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
1d1b88dc 920 else
25024989 921 old_real_dev = oldfcoe->netdev;
1d1b88dc
VD		 922
923 if (cur_real_dev == old_real_dev) {
991cbb60 924 fcoe->oem = oldfcoe->oem;
d7179680
VD		 925 break;
926 }
927 }
928
991cbb60 929 if (fcoe->oem) {
1875f27e 930 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
d7179680
VD		 931 printk(KERN_ERR "fcoe_em_config: failed to add "
932 "offload em:%p on interface:%s\n",
991cbb60 933 fcoe->oem, fcoe->netdev->name);
d7179680
VD		 934 return -ENOMEM;
935 }
936 } else {
1875f27e
RL		 937 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
938 FCOE_MIN_XID, lport->lro_xid,
939 fcoe_oem_match);
991cbb60 940 if (!fcoe->oem) {
d7179680
VD		 941 printk(KERN_ERR "fcoe_em_config: failed to allocate "
942 "em for offload exches on interface:%s\n",
25024989 943 fcoe->netdev->name);
d7179680
VD		 944 return -ENOMEM;
945 }
946 }
947
948 /*
949 * Exclude offload EM xid range from next EM xid range.
950 */
1875f27e 951 min_xid += lport->lro_xid + 1;
d7179680
VD		 952
953skip_oem:
1875f27e 954 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
d7179680 955 printk(KERN_ERR "fcoe_em_config: failed to "
25024989 956 "allocate em on interface %s\n", fcoe->netdev->name);
7f349142 957 return -ENOMEM;
d7179680 958 }
7f349142
VD		 959
960 return 0;
961}
962
963/**
1875f27e
RL		 964 * fcoe_if_destroy() - Tear down a SW FCoE instance
965 * @lport: The local port to be destroyed
34ce27bc 966 *
7f349142 967 */
af7f85d9 968static void fcoe_if_destroy(struct fc_lport *lport)
7f349142 969{
b2085a4e
NP		 970 struct fcoe_port *port = lport_priv(lport);
971 struct fcoe_interface *fcoe = port->priv;
972 struct net_device *netdev = fcoe->netdev;
973
974 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
975
976 /* Logout of the fabric */
977 fc_fabric_logoff(lport);
978
979 /* Cleanup the fc_lport */
980 fc_lport_destroy(lport);
981
982 /* Stop the transmit retry timer */
983 del_timer_sync(&port->timer);
984
985 /* Free existing transmit skbs */
986 fcoe_clean_pending_queue(lport);
987
988 rtnl_lock();
989 if (!is_zero_ether_addr(port->data_src_addr))
990 dev_uc_del(netdev, port->data_src_addr);
433eba04
VD		 991 if (lport->vport)
992 synchronize_net();
993 else
994 fcoe_interface_remove(fcoe);
b2085a4e
NP		 995 rtnl_unlock();
996
f161fb72 997 /* Free queued packets for the per-CPU receive threads */
af7f85d9 998 fcoe_percpu_clean(lport);
f161fb72 999
7f349142 1000 /* Detach from the scsi-ml */
af7f85d9
CL		 1001 fc_remove_host(lport->host);
1002 scsi_remove_host(lport->host);
7f349142 1003
80e736f8
YZ		 1004 /* Destroy lport scsi_priv */
1005 fc_fcp_destroy(lport);
1006
7f349142 1007 /* There are no more rports or I/O, free the EM */
af7f85d9 1008 fc_exch_mgr_free(lport);
7f349142 1009
7f349142 1010 /* Free memory used by statistical counters */
af7f85d9 1011 fc_lport_free_stats(lport);
7f349142 1012
3cab4468
VD		 1013 /*
1014 * Release the Scsi_Host for vport but hold on to
1015 * master lport until it fcoe interface fully cleaned-up.
1016 */
1017 if (lport->vport)
1018 scsi_host_put(lport->host);
7f349142
VD		 1019}
1020
1875f27e
RL		 1021/**
1022 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
1023 * @lport: The local port to setup DDP for
1024 * @xid: The exchange ID for this DDP transfer
1025 * @sgl: The scatterlist describing this transfer
1026 * @sgc: The number of sg items
7f349142 1027 *
1875f27e 1028 * Returns: 0 if the DDP context was not configured
7f349142 1029 */
1875f27e
RL		 1030static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
1031 struct scatterlist *sgl, unsigned int sgc)
7f349142 1032{
1875f27e 1033 struct net_device *netdev = fcoe_netdev(lport);
7f349142 1034
1875f27e
RL		 1035 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
1036 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
1037 xid, sgl,
1038 sgc);
7f349142
VD		 1039
1040 return 0;
1041}
1042
71f89491
YZ		 1043/**
1044 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device
1045 * @lport: The local port to setup DDP for
1046 * @xid: The exchange ID for this DDP transfer
1047 * @sgl: The scatterlist describing this transfer
1048 * @sgc: The number of sg items
1049 *
1050 * Returns: 0 if the DDP context was not configured
1051 */
1052static int fcoe_ddp_target(struct fc_lport *lport, u16 xid,
1053 struct scatterlist *sgl, unsigned int sgc)
1054{
1055 struct net_device *netdev = fcoe_netdev(lport);
1056
1057 if (netdev->netdev_ops->ndo_fcoe_ddp_target)
1058 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid,
1059 sgl, sgc);
1060
1061 return 0;
1062}
1063
1064
1875f27e
RL		 1065/**
1066 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
1067 * @lport: The local port to complete DDP on
1068 * @xid: The exchange ID for this DDP transfer
7f349142 1069 *
1875f27e 1070 * Returns: the length of data that have been completed by DDP
7f349142 1071 */
1875f27e 1072static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
7f349142 1073{
1875f27e 1074 struct net_device *netdev = fcoe_netdev(lport);
7f349142 1075
1875f27e
RL		 1076 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
1077 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
7f349142
VD		 1078 return 0;
1079}
1080
7f349142 1081/**
1875f27e
RL		 1082 * fcoe_if_create() - Create a FCoE instance on an interface
1083 * @fcoe: The FCoE interface to create a local port on
1084 * @parent: The device pointer to be the parent in sysfs for the SCSI host
1085 * @npiv: Indicates if the port is a vport or not
7f349142 1086 *
1875f27e 1087 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
7f349142 1088 *
1875f27e 1089 * Returns: The allocated fc_lport or an error pointer
7f349142 1090 */
030f4e00 1091static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
9a05753b 1092 struct device *parent, int npiv)
7f349142 1093{
619fe4be 1094 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
1875f27e 1095 struct net_device *netdev = fcoe->netdev;
72fa396b 1096 struct fc_lport *lport, *n_port;
014f5c3f 1097 struct fcoe_port *port;
72fa396b 1098 struct Scsi_Host *shost;
1875f27e 1099 int rc;
9a05753b
CL		 1100 /*
1101 * parent is only a vport if npiv is 1,
1102 * but we'll only use vport in that case so go ahead and set it
1103 */
1104 struct fc_vport *vport = dev_to_vport(parent);
7f349142 1105
d5488eb9 1106 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
7f349142 1107
72fa396b
VD		 1108 if (!npiv)
1109 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port));
1110 else
1111 lport = libfc_vport_create(vport, sizeof(*port));
1112
86221969 1113 if (!lport) {
d5488eb9 1114 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
af7f85d9 1115 rc = -ENOMEM;
030f4e00 1116 goto out;
7f349142 1117 }
014f5c3f 1118 port = lport_priv(lport);
2e70e241 1119 port->lport = lport;
8597ae8b 1120 port->priv = fcoe;
66524ec9 1121 port->get_netdev = fcoe_netdev;
8597ae8b
BPG		 1122 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH;
1123 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH;
2e70e241 1124 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
7f349142 1125
f9184df3
NH		 1126 /*
1127 * Need to add the lport to the hostlist
1128 * so we catch NETDEV_CHANGE events.
1129 */
1130 fcoe_hostlist_add(lport);
1131
1875f27e 1132 /* configure a fc_lport including the exchange manager */
af7f85d9 1133 rc = fcoe_lport_config(lport);
7f349142 1134 if (rc) {
d5488eb9
RL		 1135 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
1136 "interface\n");
7f349142
VD		 1137 goto out_host_put;
1138 }
1139
9a05753b 1140 if (npiv) {
9f8f3aa6
CL		 1141 FCOE_NETDEV_DBG(netdev, "Setting vport names, "
1142 "%16.16llx %16.16llx\n",
1875f27e 1143 vport->node_name, vport->port_name);
9a05753b
CL		 1144 fc_set_wwnn(lport, vport->node_name);
1145 fc_set_wwpn(lport, vport->port_name);
1146 }
1147
ab6b85c1 1148 /* configure lport network properties */
af7f85d9 1149 rc = fcoe_netdev_config(lport, netdev);
ab6b85c1 1150 if (rc) {
d5488eb9
RL		 1151 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
1152 "interface\n");
54b649f8 1153 goto out_lp_destroy;
ab6b85c1 1154 }
97c8389d 1155
7f349142 1156 /* configure lport scsi host properties */
8ba00a4b 1157 rc = fcoe_shost_config(lport, parent);
7f349142 1158 if (rc) {
d5488eb9
RL		 1159 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
1160 "interface\n");
54b649f8 1161 goto out_lp_destroy;
7f349142
VD		 1162 }
1163
96316099 1164 /* Initialize the library */
619fe4be 1165 rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1);
7f349142 1166 if (rc) {
96316099 1167 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
d5488eb9 1168 "interface\n");
96316099 1169 goto out_lp_destroy;
7f349142
VD		 1170 }
1171
6fef3902
NP		 1172 /* Initialized FDMI information */
1173 fcoe_fdmi_info(lport, netdev);
1174
72fa396b
VD		 1175 /*
1176 * fcoe_em_alloc() and fcoe_hostlist_add() both
1177 * need to be atomic with respect to other changes to the
1178 * hostlist since fcoe_em_alloc() looks for an existing EM
1179 * instance on host list updated by fcoe_hostlist_add().
1180 *
1181 * This is currently handled through the fcoe_config_mutex
1182 * begin held.
1183 */
1184 if (!npiv)
9a05753b
CL		 1185 /* lport exch manager allocation */
1186 rc = fcoe_em_config(lport);
72fa396b
VD		 1187 else {
1188 shost = vport_to_shost(vport);
1189 n_port = shost_priv(shost);
1190 rc = fc_exch_mgr_list_clone(n_port, lport);
1191 }
1192
1193 if (rc) {
1194 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n");
1195 goto out_lp_destroy;
7f349142
VD		 1196 }
1197
af7f85d9 1198 return lport;
7f349142
VD		 1199
1200out_lp_destroy:
af7f85d9 1201 fc_exch_mgr_free(lport);
7f349142 1202out_host_put:
f9184df3 1203 fcoe_hostlist_del(lport);
af7f85d9
CL		 1204 scsi_host_put(lport->host);
1205out:
1206 return ERR_PTR(rc);
7f349142
VD		 1207}
1208
1209/**
1875f27e 1210 * fcoe_if_init() - Initialization routine for fcoe.ko
7f349142 1211 *
1875f27e
RL		 1212 * Attaches the SW FCoE transport to the FC transport
1213 *
1214 * Returns: 0 on success
7f349142
VD		 1215 */
1216static int __init fcoe_if_init(void)
1217{
1218 /* attach to scsi transport */
8ca86f84
YZ		 1219 fcoe_nport_scsi_transport =
1220 fc_attach_transport(&fcoe_nport_fc_functions);
1221 fcoe_vport_scsi_transport =
1222 fc_attach_transport(&fcoe_vport_fc_functions);
7f349142 1223
8ca86f84 1224 if (!fcoe_nport_scsi_transport) {
d5488eb9 1225 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
7f349142
VD		 1226 return -ENODEV;
1227 }
1228
1229 return 0;
1230}
1231
1232/**
1875f27e
RL		 1233 * fcoe_if_exit() - Tear down fcoe.ko
1234 *
1235 * Detaches the SW FCoE transport from the FC transport
7f349142 1236 *
1875f27e 1237 * Returns: 0 on success
7f349142 1238 */
7c9c6841 1239static int __exit fcoe_if_exit(void)
7f349142 1240{
8ca86f84
YZ		 1241 fc_release_transport(fcoe_nport_scsi_transport);
1242 fc_release_transport(fcoe_vport_scsi_transport);
1243 fcoe_nport_scsi_transport = NULL;
1244 fcoe_vport_scsi_transport = NULL;
7f349142
VD		 1245 return 0;
1246}
1247
8976f424 1248/**
1875f27e
RL		 1249 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
1250 * @cpu: The CPU index of the CPU to create a receive thread for
8976f424
RL		 1251 */
1252static void fcoe_percpu_thread_create(unsigned int cpu)
1253{
1254 struct fcoe_percpu_s *p;
1255 struct task_struct *thread;
1256
1257 p = &per_cpu(fcoe_percpu, cpu);
1258
5c609ff9
ED		 1259 thread = kthread_create_on_node(fcoe_percpu_receive_thread,
1260 (void *)p, cpu_to_node(cpu),
1261 "fcoethread/%d", cpu);
8976f424 1262
e7a51997 1263 if (likely(!IS_ERR(thread))) {
8976f424
RL		 1264 kthread_bind(thread, cpu);
1265 wake_up_process(thread);
1266
1267 spin_lock_bh(&p->fcoe_rx_list.lock);
1268 p->thread = thread;
1269 spin_unlock_bh(&p->fcoe_rx_list.lock);
1270 }
1271}
1272
1273/**
1875f27e
RL		 1274 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1275 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
8976f424
RL		 1276 *
1277 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1278 * current CPU's Rx thread. If the thread being destroyed is bound to
1279 * the CPU processing this context the skbs will be freed.
1280 */
1281static void fcoe_percpu_thread_destroy(unsigned int cpu)
1282{
1283 struct fcoe_percpu_s *p;
1284 struct task_struct *thread;
1285 struct page *crc_eof;
1286 struct sk_buff *skb;
1287#ifdef CONFIG_SMP
1288 struct fcoe_percpu_s *p0;
f018b73a 1289 unsigned targ_cpu = get_cpu();
8976f424
RL		 1290#endif /* CONFIG_SMP */
1291
d5488eb9 1292 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu);
8976f424
RL		 1293
1294 /* Prevent any new skbs from being queued for this CPU. */
1295 p = &per_cpu(fcoe_percpu, cpu);
1296 spin_lock_bh(&p->fcoe_rx_list.lock);
1297 thread = p->thread;
1298 p->thread = NULL;
1299 crc_eof = p->crc_eof_page;
1300 p->crc_eof_page = NULL;
1301 p->crc_eof_offset = 0;
1302 spin_unlock_bh(&p->fcoe_rx_list.lock);
1303
1304#ifdef CONFIG_SMP
1305 /*
1306 * Don't bother moving the skb's if this context is running
1307 * on the same CPU that is having its thread destroyed. This
1308 * can easily happen when the module is removed.
1309 */
1310 if (cpu != targ_cpu) {
1311 p0 = &per_cpu(fcoe_percpu, targ_cpu);
1312 spin_lock_bh(&p0->fcoe_rx_list.lock);
1313 if (p0->thread) {
d5488eb9
RL		 1314 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1315 cpu, targ_cpu);
8976f424
RL		 1316
1317 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1318 __skb_queue_tail(&p0->fcoe_rx_list, skb);
1319 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1320 } else {
1321 /*
1322 * The targeted CPU is not initialized and cannot accept
1875f27e 1323 * new skbs. Unlock the targeted CPU and drop the skbs
8976f424
RL		 1324 * on the CPU that is going offline.
1325 */
1326 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1327 kfree_skb(skb);
1328 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1329 }
1330 } else {
1331 /*
1332 * This scenario occurs when the module is being removed
1333 * and all threads are being destroyed. skbs will continue
1334 * to be shifted from the CPU thread that is being removed
1335 * to the CPU thread associated with the CPU that is processing
1336 * the module removal. Once there is only one CPU Rx thread it
1337 * will reach this case and we will drop all skbs and later
1338 * stop the thread.
1339 */
1340 spin_lock_bh(&p->fcoe_rx_list.lock);
1341 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1342 kfree_skb(skb);
1343 spin_unlock_bh(&p->fcoe_rx_list.lock);
1344 }
f018b73a 1345 put_cpu();
8976f424
RL		 1346#else
1347 /*
dd3fd72e 1348 * This a non-SMP scenario where the singular Rx thread is
8976f424
RL		 1349 * being removed. Free all skbs and stop the thread.
1350 */
1351 spin_lock_bh(&p->fcoe_rx_list.lock);
1352 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1353 kfree_skb(skb);
1354 spin_unlock_bh(&p->fcoe_rx_list.lock);
1355#endif
1356
1357 if (thread)
1358 kthread_stop(thread);
1359
1360 if (crc_eof)
1361 put_page(crc_eof);
1362}
1363
1364/**
1875f27e
RL		 1365 * fcoe_cpu_callback() - Handler for CPU hotplug events
1366 * @nfb: The callback data block
1367 * @action: The event triggering the callback
1368 * @hcpu: The index of the CPU that the event is for
8976f424 1369 *
1875f27e 1370 * This creates or destroys per-CPU data for fcoe
8976f424
RL		 1371 *
1372 * Returns NOTIFY_OK always.
1373 */
1374static int fcoe_cpu_callback(struct notifier_block *nfb,
1375 unsigned long action, void *hcpu)
1376{
1377 unsigned cpu = (unsigned long)hcpu;
1378
1379 switch (action) {
1380 case CPU_ONLINE:
1381 case CPU_ONLINE_FROZEN:
d5488eb9 1382 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu);
8976f424
RL		 1383 fcoe_percpu_thread_create(cpu);
1384 break;
1385 case CPU_DEAD:
1386 case CPU_DEAD_FROZEN:
d5488eb9 1387 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu);
8976f424
RL		 1388 fcoe_percpu_thread_destroy(cpu);
1389 break;
1390 default:
1391 break;
1392 }
1393 return NOTIFY_OK;
1394}
1395
064287ee
KP		 1396/**
1397 * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming
1398 * command.
064287ee 1399 *
d272281c
VD		 1400 * This routine selects next CPU based on cpumask to distribute
1401 * incoming requests in round robin.
064287ee 1402 *
d272281c 1403 * Returns: int CPU number
064287ee 1404 */
d272281c 1405static inline unsigned int fcoe_select_cpu(void)
064287ee
KP		 1406{
1407 static unsigned int selected_cpu;
1408
d272281c
VD		 1409 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask);
1410 if (selected_cpu >= nr_cpu_ids)
1411 selected_cpu = cpumask_first(cpu_online_mask);
1412
064287ee
KP		 1413 return selected_cpu;
1414}
1415
85b4aa49 1416/**
1875f27e
RL		 1417 * fcoe_rcv() - Receive packets from a net device
1418 * @skb: The received packet
1419 * @netdev: The net device that the packet was received on
1420 * @ptype: The packet type context
1421 * @olddev: The last device net device
85b4aa49 1422 *
1875f27e
RL		 1423 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1424 * FC frame and passes the frame to libfc.
85b4aa49
RL		 1425 *
1426 * Returns: 0 for success
34f42a07 1427 */
7c9c6841 1428static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
85b4aa49
RL		 1429 struct packet_type *ptype, struct net_device *olddev)
1430{
1875f27e 1431 struct fc_lport *lport;
85b4aa49 1432 struct fcoe_rcv_info *fr;
619fe4be 1433 struct fcoe_ctlr *ctlr;
259ad85d 1434 struct fcoe_interface *fcoe;
85b4aa49 1435 struct fc_frame_header *fh;
85b4aa49 1436 struct fcoe_percpu_s *fps;
519e5135 1437 struct ethhdr *eh;
b2f0091f 1438 unsigned int cpu;
85b4aa49 1439
259ad85d 1440 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
619fe4be
RL		 1441 ctlr = fcoe_to_ctlr(fcoe);
1442 lport = ctlr->lp;
1875f27e 1443 if (unlikely(!lport)) {
465b87bf 1444 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n");
85b4aa49
RL		 1445 goto err2;
1446 }
1875f27e 1447 if (!lport->link_up)
97c8389d 1448 goto err2;
85b4aa49 1449
465b87bf
BVA		 1450 FCOE_NETDEV_DBG(netdev,
1451 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
d5488eb9
RL		 1452 skb->len, skb->data_len, skb->head, skb->data,
1453 skb_tail_pointer(skb), skb_end_pointer(skb),
1454 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
85b4aa49 1455
8b612434
NH		 1456
1457 skb = skb_share_check(skb, GFP_ATOMIC);
1458
1459 if (skb == NULL)
1460 return NET_RX_DROP;
1461
519e5135 1462 eh = eth_hdr(skb);
519e5135 1463
619fe4be 1464 if (is_fip_mode(ctlr) &&
6942df7f 1465 !ether_addr_equal(eh->h_source, ctlr->dest_addr)) {
519e5135
VD		 1466 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
1467 eh->h_source);
85b4aa49
RL		 1468 goto err;
1469 }
1470
1471 /*
1472 * Check for minimum frame length, and make sure required FCoE
1473 * and FC headers are pulled into the linear data area.
1474 */
1475 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1875f27e 1476 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
85b4aa49
RL		 1477 goto err;
1478
1479 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1480 fh = (struct fc_frame_header *) skb_transport_header(skb);
1481
0ee31cb5
RL		 1482 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) {
1483 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n",
1484 eh->h_dest);
1485 goto err;
1486 }
1487
85b4aa49 1488 fr = fcoe_dev_from_skb(skb);
1875f27e 1489 fr->fr_dev = lport;
5e5e92df 1490
85b4aa49 1491 /*
b2f0091f
VD		 1492 * In case the incoming frame's exchange is originated from
1493 * the initiator, then received frame's exchange id is ANDed
1494 * with fc_cpu_mask bits to get the same cpu on which exchange
d272281c
VD		 1495 * was originated, otherwise select cpu using rx exchange id
1496 * or fcoe_select_cpu().
85b4aa49 1497 */
b2f0091f
VD		 1498 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1499 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
064287ee 1500 else {
d272281c
VD		 1501 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)
1502 cpu = fcoe_select_cpu();
1503 else
29bdd2bb 1504 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask;
064287ee 1505 }
324f6678
VD		 1506
1507 if (cpu >= nr_cpu_ids)
1508 goto err;
1509
8976f424 1510 fps = &per_cpu(fcoe_percpu, cpu);
94aa29f2 1511 spin_lock(&fps->fcoe_rx_list.lock);
8976f424
RL		 1512 if (unlikely(!fps->thread)) {
1513 /*
1514 * The targeted CPU is not ready, let's target
1515 * the first CPU now. For non-SMP systems this
1516 * will check the same CPU twice.
1517 */
1875f27e 1518 FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread "
d5488eb9
RL		 1519 "ready for incoming skb- using first online "
1520 "CPU.\n");
8976f424 1521
94aa29f2 1522 spin_unlock(&fps->fcoe_rx_list.lock);
6957177f 1523 cpu = cpumask_first(cpu_online_mask);
8976f424 1524 fps = &per_cpu(fcoe_percpu, cpu);
94aa29f2 1525 spin_lock(&fps->fcoe_rx_list.lock);
8976f424 1526 if (!fps->thread) {
94aa29f2 1527 spin_unlock(&fps->fcoe_rx_list.lock);
8976f424
RL		 1528 goto err;
1529 }
1530 }
1531
1532 /*
1533 * We now have a valid CPU that we're targeting for
1534 * this skb. We also have this receive thread locked,
1535 * so we're free to queue skbs into it's queue.
1536 */
85b4aa49 1537
5e70c4c4
NH		 1538 /*
1539 * Note: We used to have a set of conditions under which we would
1540 * call fcoe_recv_frame directly, rather than queuing to the rx list
1541 * as it could save a few cycles, but doing so is prohibited, as
1542 * fcoe_recv_frame has several paths that may sleep, which is forbidden
1543 * in softirq context.
859b7b64 1544 */
5e70c4c4 1545 __skb_queue_tail(&fps->fcoe_rx_list, skb);
20dc3811 1546 if (fps->thread->state == TASK_INTERRUPTIBLE)
5e70c4c4 1547 wake_up_process(fps->thread);
94aa29f2 1548 spin_unlock(&fps->fcoe_rx_list.lock);
85b4aa49 1549
34bac2ef 1550 return NET_RX_SUCCESS;
85b4aa49 1551err:
1bd49b48 1552 per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++;
f018b73a 1553 put_cpu();
85b4aa49
RL		 1554err2:
1555 kfree_skb(skb);
34bac2ef 1556 return NET_RX_DROP;
85b4aa49 1557}
85b4aa49
RL		 1558
1559/**
8597ae8b 1560 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1875f27e
RL		 1561 * @skb: The packet to be transmitted
1562 * @tlen: The total length of the trailer
1563 *
85b4aa49 1564 * Returns: 0 for success
34f42a07 1565 */
8597ae8b 1566static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)
85b4aa49
RL		 1567{
1568 struct fcoe_percpu_s *fps;
8597ae8b 1569 int rc;
85b4aa49 1570
5e5e92df 1571 fps = &get_cpu_var(fcoe_percpu);
8597ae8b 1572 rc = fcoe_get_paged_crc_eof(skb, tlen, fps);
5e5e92df 1573 put_cpu_var(fcoe_percpu);
85b4aa49 1574
8597ae8b 1575 return rc;
85b4aa49 1576}
85b4aa49
RL		 1577
1578/**
1875f27e
RL		 1579 * fcoe_xmit() - Transmit a FCoE frame
1580 * @lport: The local port that the frame is to be transmitted for
1581 * @fp: The frame to be transmitted
85b4aa49 1582 *
1875f27e 1583 * Return: 0 for success
34f42a07 1584 */
7c9c6841 1585static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
85b4aa49 1586{
4bb6b515 1587 int wlen;
85b4aa49
RL		 1588 u32 crc;
1589 struct ethhdr *eh;
1590 struct fcoe_crc_eof *cp;
1591 struct sk_buff *skb;
1bd49b48 1592 struct fc_stats *stats;
85b4aa49
RL		 1593 struct fc_frame_header *fh;
1594 unsigned int hlen; /* header length implies the version */
1595 unsigned int tlen; /* trailer length */
1596 unsigned int elen; /* eth header, may include vlan */
1875f27e 1597 struct fcoe_port *port = lport_priv(lport);
8597ae8b 1598 struct fcoe_interface *fcoe = port->priv;
619fe4be 1599 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
85b4aa49
RL		 1600 u8 sof, eof;
1601 struct fcoe_hdr *hp;
1602
1603 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1604
85b4aa49 1605 fh = fc_frame_header_get(fp);
97c8389d
JE		 1606 skb = fp_skb(fp);
1607 wlen = skb->len / FCOE_WORD_TO_BYTE;
1608
1875f27e 1609 if (!lport->link_up) {
3caf02ee 1610 kfree_skb(skb);
97c8389d 1611 return 0;
85b4aa49
RL		 1612 }
1613
9860eeb4 1614 if (unlikely(fh->fh_type == FC_TYPE_ELS) &&
619fe4be 1615 fcoe_ctlr_els_send(ctlr, lport, skb))
97c8389d
JE		 1616 return 0;
1617
85b4aa49
RL		 1618 sof = fr_sof(fp);
1619 eof = fr_eof(fp);
1620
4e57e1cb 1621 elen = sizeof(struct ethhdr);
85b4aa49
RL		 1622 hlen = sizeof(struct fcoe_hdr);
1623 tlen = sizeof(struct fcoe_crc_eof);
1624 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1625
1626 /* crc offload */
1875f27e 1627 if (likely(lport->crc_offload)) {
253aab05 1628 skb->ip_summed = CHECKSUM_PARTIAL;
85b4aa49
RL		 1629 skb->csum_start = skb_headroom(skb);
1630 skb->csum_offset = skb->len;
1631 crc = 0;
1632 } else {
1633 skb->ip_summed = CHECKSUM_NONE;
1634 crc = fcoe_fc_crc(fp);
1635 }
1636
014f5c3f 1637 /* copy port crc and eof to the skb buff */
85b4aa49
RL		 1638 if (skb_is_nonlinear(skb)) {
1639 skb_frag_t *frag;
8597ae8b 1640 if (fcoe_alloc_paged_crc_eof(skb, tlen)) {
e9041581 1641 kfree_skb(skb);
85b4aa49
RL		 1642 return -ENOMEM;
1643 }
1644 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
77dfce07 1645 cp = kmap_atomic(skb_frag_page(frag))
85b4aa49
RL		 1646 + frag->page_offset;
1647 } else {
1648 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
1649 }
1650
1651 memset(cp, 0, sizeof(*cp));
1652 cp->fcoe_eof = eof;
1653 cp->fcoe_crc32 = cpu_to_le32(~crc);
1654
1655 if (skb_is_nonlinear(skb)) {
77dfce07 1656 kunmap_atomic(cp);
85b4aa49
RL		 1657 cp = NULL;
1658 }
1659
014f5c3f 1660 /* adjust skb network/transport offsets to match mac/fcoe/port */
85b4aa49
RL		 1661 skb_push(skb, elen + hlen);
1662 skb_reset_mac_header(skb);
1663 skb_reset_network_header(skb);
1664 skb->mac_len = elen;
211c738d 1665 skb->protocol = htons(ETH_P_FCOE);
31c37a6f 1666 skb->priority = fcoe->priority;
6f6c2aa3 1667
d1483bb9 1668 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN &&
f646968f 1669 fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) {
2884d423 1670 /* must set skb->dev before calling vlan_put_tag */
d1483bb9 1671 skb->dev = fcoe->realdev;
b960a0ac
JP		 1672 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1673 vlan_dev_vlan_id(fcoe->netdev));
d1483bb9
VD		 1674 } else
1675 skb->dev = fcoe->netdev;
85b4aa49
RL		 1676
1677 /* fill up mac and fcoe headers */
1678 eh = eth_hdr(skb);
1679 eh->h_proto = htons(ETH_P_FCOE);
619fe4be
RL		 1680 memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN);
1681 if (ctlr->map_dest)
cd229e42 1682 memcpy(eh->h_dest + 3, fh->fh_d_id, 3);
85b4aa49 1683
619fe4be
RL		 1684 if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN))
1685 memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN);
85b4aa49 1686 else
11b56188 1687 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
85b4aa49
RL		 1688
1689 hp = (struct fcoe_hdr *)(eh + 1);
1690 memset(hp, 0, sizeof(*hp));
1691 if (FC_FCOE_VER)
1692 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1693 hp->fcoe_sof = sof;
1694
39ca9a06 1695 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1875f27e 1696 if (lport->seq_offload && fr_max_payload(fp)) {
39ca9a06
YZ		 1697 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1698 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1699 } else {
1700 skb_shinfo(skb)->gso_type = 0;
1701 skb_shinfo(skb)->gso_size = 0;
1702 }
85b4aa49 1703 /* update tx stats: regardless if LLD fails */
1bd49b48 1704 stats = per_cpu_ptr(lport->stats, get_cpu());
582b45bc
RL		 1705 stats->TxFrames++;
1706 stats->TxWords += wlen;
f018b73a 1707 put_cpu();
85b4aa49
RL		 1708
1709 /* send down to lld */
1875f27e 1710 fr_dev(fp) = lport;
980f5156 1711 fcoe_port_send(port, skb);
85b4aa49
RL		 1712 return 0;
1713}
85b4aa49 1714
e7a51997 1715/**
1875f27e
RL		 1716 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1717 * @skb: The completed skb (argument required by destructor)
e7a51997
JE		 1718 */
1719static void fcoe_percpu_flush_done(struct sk_buff *skb)
1720{
1721 complete(&fcoe_flush_completion);
1722}
1723
52ee8321
VD		 1724/**
1725 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC
1726 * @lport: The local port the frame was received on
1727 * @fp: The received frame
1728 *
1729 * Return: 0 on passing filtering checks
1730 */
1731static inline int fcoe_filter_frames(struct fc_lport *lport,
1732 struct fc_frame *fp)
1733{
619fe4be 1734 struct fcoe_ctlr *ctlr;
52ee8321
VD		 1735 struct fcoe_interface *fcoe;
1736 struct fc_frame_header *fh;
1737 struct sk_buff *skb = (struct sk_buff *)fp;
1bd49b48 1738 struct fc_stats *stats;
52ee8321
VD		 1739
1740 /*
1741 * We only check CRC if no offload is available and if it is
1742 * it's solicited data, in which case, the FCP layer would
1743 * check it during the copy.
1744 */
1745 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
1746 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1747 else
1748 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1749
1750 fh = (struct fc_frame_header *) skb_transport_header(skb);
1751 fh = fc_frame_header_get(fp);
1752 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP)
1753 return 0;
1754
8597ae8b 1755 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;
619fe4be
RL		 1756 ctlr = fcoe_to_ctlr(fcoe);
1757 if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
52ee8321
VD		 1758 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
1759 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1760 return -EINVAL;
1761 }
1762
f2f96d20 1763 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) ||
52ee8321
VD		 1764 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) {
1765 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1766 return 0;
1767 }
1768
1bd49b48 1769 stats = per_cpu_ptr(lport->stats, get_cpu());
52ee8321
VD		 1770 stats->InvalidCRCCount++;
1771 if (stats->InvalidCRCCount < 5)
1772 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
7e1e7ead 1773 put_cpu();
52ee8321
VD		 1774 return -EINVAL;
1775}
1776
34f42a07 1777/**
859b7b64
CL		 1778 * fcoe_recv_frame() - process a single received frame
1779 * @skb: frame to process
85b4aa49 1780 */
859b7b64 1781static void fcoe_recv_frame(struct sk_buff *skb)
85b4aa49 1782{
85b4aa49 1783 u32 fr_len;
1875f27e 1784 struct fc_lport *lport;
85b4aa49 1785 struct fcoe_rcv_info *fr;
1bd49b48 1786 struct fc_stats *stats;
85b4aa49
RL		 1787 struct fcoe_crc_eof crc_eof;
1788 struct fc_frame *fp;
014f5c3f 1789 struct fcoe_port *port;
85b4aa49
RL		 1790 struct fcoe_hdr *hp;
1791
859b7b64
CL		 1792 fr = fcoe_dev_from_skb(skb);
1793 lport = fr->fr_dev;
1794 if (unlikely(!lport)) {
1795 if (skb->destructor != fcoe_percpu_flush_done)
465b87bf 1796 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n");
859b7b64
CL		 1797 kfree_skb(skb);
1798 return;
1799 }
1800
465b87bf
BVA		 1801 FCOE_NETDEV_DBG(skb->dev,
1802 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
859b7b64
CL		 1803 skb->len, skb->data_len,
1804 skb->head, skb->data, skb_tail_pointer(skb),
1805 skb_end_pointer(skb), skb->csum,
1806 skb->dev ? skb->dev->name : "<NULL>");
1807
859b7b64 1808 port = lport_priv(lport);
f1633011 1809 skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */
859b7b64
CL		 1810
1811 /*
1812 * Frame length checks and setting up the header pointers
1813 * was done in fcoe_rcv already.
1814 */
1815 hp = (struct fcoe_hdr *) skb_network_header(skb);
859b7b64 1816
1bd49b48 1817 stats = per_cpu_ptr(lport->stats, get_cpu());
859b7b64
CL		 1818 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1819 if (stats->ErrorFrames < 5)
1820 printk(KERN_WARNING "fcoe: FCoE version "
1821 "mismatch: The frame has "
1822 "version %x, but the "
1823 "initiator supports version "
1824 "%x\n", FC_FCOE_DECAPS_VER(hp),
1825 FC_FCOE_VER);
f018b73a 1826 goto drop;
859b7b64
CL		 1827 }
1828
1829 skb_pull(skb, sizeof(struct fcoe_hdr));
1830 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1831
1832 stats->RxFrames++;
1833 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1834
1835 fp = (struct fc_frame *)skb;
1836 fc_frame_init(fp);
1837 fr_dev(fp) = lport;
1838 fr_sof(fp) = hp->fcoe_sof;
1839
1840 /* Copy out the CRC and EOF trailer for access */
f018b73a
JE		 1841 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof)))
1842 goto drop;
859b7b64
CL		 1843 fr_eof(fp) = crc_eof.fcoe_eof;
1844 fr_crc(fp) = crc_eof.fcoe_crc32;
f018b73a
JE		 1845 if (pskb_trim(skb, fr_len))
1846 goto drop;
859b7b64 1847
52ee8321
VD		 1848 if (!fcoe_filter_frames(lport, fp)) {
1849 put_cpu();
1850 fc_exch_recv(lport, fp);
1851 return;
859b7b64 1852 }
f018b73a
JE		 1853drop:
1854 stats->ErrorFrames++;
1855 put_cpu();
1856 kfree_skb(skb);
859b7b64
CL		 1857}
1858
1859/**
1860 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1861 * @arg: The per-CPU context
1862 *
1863 * Return: 0 for success
1864 */
7c9c6841 1865static int fcoe_percpu_receive_thread(void *arg)
859b7b64
CL		 1866{
1867 struct fcoe_percpu_s *p = arg;
1868 struct sk_buff *skb;
20dc3811
NH		 1869 struct sk_buff_head tmp;
1870
1871 skb_queue_head_init(&tmp);
859b7b64 1872
8698a745 1873 set_user_nice(current, MIN_NICE);
85b4aa49
RL		 1874
1875 while (!kthread_should_stop()) {
1876
1877 spin_lock_bh(&p->fcoe_rx_list.lock);
20dc3811 1878 skb_queue_splice_init(&p->fcoe_rx_list, &tmp);
20dc3811 1879
95fdd5e9 1880 if (!skb_queue_len(&tmp)) {
85b4aa49
RL		 1881 set_current_state(TASK_INTERRUPTIBLE);
1882 spin_unlock_bh(&p->fcoe_rx_list.lock);
1883 schedule();
481ebb3d 1884 continue;
95fdd5e9
NH		 1885 }
1886
1887 spin_unlock_bh(&p->fcoe_rx_list.lock);
1888
1889 while ((skb = __skb_dequeue(&tmp)) != NULL)
1890 fcoe_recv_frame(skb);
1891
85b4aa49
RL		 1892 }
1893 return 0;
1894}
1895
85b4aa49 1896/**
1875f27e 1897 * fcoe_dev_setup() - Setup the link change notification interface
34f42a07 1898 */
b0d428ad 1899static void fcoe_dev_setup(void)
85b4aa49 1900{
6f6c2aa3 1901 register_dcbevent_notifier(&dcb_notifier);
85b4aa49
RL		 1902 register_netdevice_notifier(&fcoe_notifier);
1903}
1904
1905/**
1875f27e 1906 * fcoe_dev_cleanup() - Cleanup the link change notification interface
34f42a07 1907 */
85b4aa49
RL		 1908static void fcoe_dev_cleanup(void)
1909{
6f6c2aa3 1910 unregister_dcbevent_notifier(&dcb_notifier);
85b4aa49
RL		 1911 unregister_netdevice_notifier(&fcoe_notifier);
1912}
1913
6f6c2aa3 1914static struct fcoe_interface *
1915fcoe_hostlist_lookup_realdev_port(struct net_device *netdev)
1916{
1917 struct fcoe_interface *fcoe;
1918 struct net_device *real_dev;
1919
1920 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1921 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
1922 real_dev = vlan_dev_real_dev(fcoe->netdev);
1923 else
1924 real_dev = fcoe->netdev;
1925
1926 if (netdev == real_dev)
1927 return fcoe;
1928 }
1929 return NULL;
1930}
1931
1932static int fcoe_dcb_app_notification(struct notifier_block *notifier,
1933 ulong event, void *ptr)
1934{
1935 struct dcb_app_type *entry = ptr;
619fe4be 1936 struct fcoe_ctlr *ctlr;
6f6c2aa3 1937 struct fcoe_interface *fcoe;
1938 struct net_device *netdev;
6f6c2aa3 1939 int prio;
1940
1941 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE)
1942 return NOTIFY_OK;
1943
1944 netdev = dev_get_by_index(&init_net, entry->ifindex);
1945 if (!netdev)
1946 return NOTIFY_OK;
1947
1948 fcoe = fcoe_hostlist_lookup_realdev_port(netdev);
1949 dev_put(netdev);
1950 if (!fcoe)
1951 return NOTIFY_OK;
1952
619fe4be
RL		 1953 ctlr = fcoe_to_ctlr(fcoe);
1954
6f6c2aa3 1955 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE)
1956 prio = ffs(entry->app.priority) - 1;
1957 else
1958 prio = entry->app.priority;
1959
1960 if (prio < 0)
1961 return NOTIFY_OK;
1962
1963 if (entry->app.protocol == ETH_P_FIP ||
1964 entry->app.protocol == ETH_P_FCOE)
619fe4be 1965 ctlr->priority = prio;
6f6c2aa3 1966
31c37a6f
NP		 1967 if (entry->app.protocol == ETH_P_FCOE)
1968 fcoe->priority = prio;
6f6c2aa3 1969
1970 return NOTIFY_OK;
1971}
1972
85b4aa49 1973/**
1875f27e
RL		 1974 * fcoe_device_notification() - Handler for net device events
1975 * @notifier: The context of the notification
1976 * @event: The type of event
1977 * @ptr: The net device that the event was on
85b4aa49 1978 *
1875f27e 1979 * This function is called by the Ethernet driver in case of link change event.
85b4aa49
RL		 1980 *
1981 * Returns: 0 for success
34f42a07 1982 */
85b4aa49
RL		 1983static int fcoe_device_notification(struct notifier_block *notifier,
1984 ulong event, void *ptr)
1985{
435c8667 1986 struct fcoe_ctlr_device *cdev;
1875f27e 1987 struct fc_lport *lport = NULL;
351638e7 1988 struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
619fe4be 1989 struct fcoe_ctlr *ctlr;
014f5c3f 1990 struct fcoe_interface *fcoe;
2e70e241 1991 struct fcoe_port *port;
1bd49b48 1992 struct fc_stats *stats;
97c8389d 1993 u32 link_possible = 1;
85b4aa49
RL		 1994 u32 mfs;
1995 int rc = NOTIFY_OK;
1996
014f5c3f 1997 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
25024989 1998 if (fcoe->netdev == netdev) {
619fe4be
RL		 1999 ctlr = fcoe_to_ctlr(fcoe);
2000 lport = ctlr->lp;
85b4aa49
RL		 2001 break;
2002 }
2003 }
1875f27e 2004 if (!lport) {
85b4aa49
RL		 2005 rc = NOTIFY_DONE;
2006 goto out;
2007 }
2008
85b4aa49
RL		 2009 switch (event) {
2010 case NETDEV_DOWN:
2011 case NETDEV_GOING_DOWN:
97c8389d 2012 link_possible = 0;
85b4aa49
RL		 2013 break;
2014 case NETDEV_UP:
2015 case NETDEV_CHANGE:
85b4aa49
RL		 2016 break;
2017 case NETDEV_CHANGEMTU:
7221d7e5
YZ		 2018 if (netdev->features & NETIF_F_FCOE_MTU)
2019 break;
1d1b88dc
VD		 2020 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
2021 sizeof(struct fcoe_crc_eof));
85b4aa49 2022 if (mfs >= FC_MIN_MAX_FRAME)
1875f27e 2023 fc_set_mfs(lport, mfs);
85b4aa49
RL		 2024 break;
2025 case NETDEV_REGISTER:
2026 break;
2e70e241
CL		 2027 case NETDEV_UNREGISTER:
2028 list_del(&fcoe->list);
619fe4be 2029 port = lport_priv(ctlr->lp);
2ca32b48 2030 queue_work(fcoe_wq, &port->destroy_work);
2e70e241
CL		 2031 goto out;
2032 break;
54a5b21d
YZ		 2033 case NETDEV_FEAT_CHANGE:
2034 fcoe_netdev_features_change(lport, netdev);
2035 break;
85b4aa49 2036 default:
1d1b88dc 2037 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
d5488eb9 2038 "from netdev netlink\n", event);
85b4aa49 2039 }
5e4f8fe7
RL		 2040
2041 fcoe_link_speed_update(lport);
2042
435c8667
RL		 2043 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2044
2045 if (link_possible && !fcoe_link_ok(lport)) {
2046 switch (cdev->enabled) {
2047 case FCOE_CTLR_DISABLED:
2048 pr_info("Link up while interface is disabled.\n");
2049 break;
2050 case FCOE_CTLR_ENABLED:
2051 case FCOE_CTLR_UNUSED:
2052 fcoe_ctlr_link_up(ctlr);
2053 };
2054 } else if (fcoe_ctlr_link_down(ctlr)) {
2055 switch (cdev->enabled) {
2056 case FCOE_CTLR_DISABLED:
2057 pr_info("Link down while interface is disabled.\n");
2058 break;
2059 case FCOE_CTLR_ENABLED:
2060 case FCOE_CTLR_UNUSED:
2061 stats = per_cpu_ptr(lport->stats, get_cpu());
2062 stats->LinkFailureCount++;
2063 put_cpu();
2064 fcoe_clean_pending_queue(lport);
2065 };
85b4aa49
RL		 2066 }
2067out:
2068 return rc;
2069}
2070
55a66d3c
VD		 2071/**
2072 * fcoe_disable() - Disables a FCoE interface
78a58246 2073 * @netdev : The net_device object the Ethernet interface to create on
55a66d3c 2074 *
78a58246 2075 * Called from fcoe transport.
55a66d3c
VD		 2076 *
2077 * Returns: 0 for success
435c8667
RL		 2078 *
2079 * Deprecated: use fcoe_ctlr_enabled()
55a66d3c 2080 */
78a58246 2081static int fcoe_disable(struct net_device *netdev)
55a66d3c 2082{
619fe4be 2083 struct fcoe_ctlr *ctlr;
55a66d3c 2084 struct fcoe_interface *fcoe;
55a66d3c
VD		 2085 int rc = 0;
2086
2087 mutex_lock(&fcoe_config_mutex);
55a66d3c 2088
ee5df628 2089 rtnl_lock();
55a66d3c
VD		 2090 fcoe = fcoe_hostlist_lookup_port(netdev);
2091 rtnl_unlock();
2092
9ee50e48 2093 if (fcoe) {
619fe4be
RL		 2094 ctlr = fcoe_to_ctlr(fcoe);
2095 fcoe_ctlr_link_down(ctlr);
2096 fcoe_clean_pending_queue(ctlr->lp);
9ee50e48 2097 } else
55a66d3c
VD		 2098 rc = -ENODEV;
2099
55a66d3c
VD		 2100 mutex_unlock(&fcoe_config_mutex);
2101 return rc;
2102}
2103
2104/**
2105 * fcoe_enable() - Enables a FCoE interface
78a58246 2106 * @netdev : The net_device object the Ethernet interface to create on
55a66d3c 2107 *
78a58246 2108 * Called from fcoe transport.
55a66d3c
VD		 2109 *
2110 * Returns: 0 for success
2111 */
78a58246 2112static int fcoe_enable(struct net_device *netdev)
55a66d3c 2113{
619fe4be 2114 struct fcoe_ctlr *ctlr;
55a66d3c 2115 struct fcoe_interface *fcoe;
55a66d3c
VD		 2116 int rc = 0;
2117
2118 mutex_lock(&fcoe_config_mutex);
ee5df628 2119 rtnl_lock();
55a66d3c
VD		 2120 fcoe = fcoe_hostlist_lookup_port(netdev);
2121 rtnl_unlock();
2122
619fe4be 2123 if (!fcoe) {
55a66d3c 2124 rc = -ENODEV;
619fe4be
RL		 2125 goto out;
2126 }
55a66d3c 2127
619fe4be
RL		 2128 ctlr = fcoe_to_ctlr(fcoe);
2129
2130 if (!fcoe_link_ok(ctlr->lp))
2131 fcoe_ctlr_link_up(ctlr);
2132
2133out:
55a66d3c
VD		 2134 mutex_unlock(&fcoe_config_mutex);
2135 return rc;
2136}
2137
435c8667
RL		 2138/**
2139 * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller
2140 * @cdev: The FCoE Controller that is being enabled or disabled
2141 *
2142 * fcoe_sysfs will ensure that the state of 'enabled' has
2143 * changed, so no checking is necessary here. This routine simply
2144 * calls fcoe_enable or fcoe_disable, both of which are deprecated.
2145 * When those routines are removed the functionality can be merged
2146 * here.
2147 */
2148static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev)
2149{
2150 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev);
2151 struct fc_lport *lport = ctlr->lp;
2152 struct net_device *netdev = fcoe_netdev(lport);
2153
2154 switch (cdev->enabled) {
2155 case FCOE_CTLR_ENABLED:
2156 return fcoe_enable(netdev);
2157 case FCOE_CTLR_DISABLED:
2158 return fcoe_disable(netdev);
2159 case FCOE_CTLR_UNUSED:
2160 default:
2161 return -ENOTSUPP;
2162 };
2163}
2164
85b4aa49 2165/**
1875f27e 2166 * fcoe_destroy() - Destroy a FCoE interface
78a58246 2167 * @netdev : The net_device object the Ethernet interface to create on
1875f27e 2168 *
78a58246 2169 * Called from fcoe transport
85b4aa49
RL		 2170 *
2171 * Returns: 0 for success
34f42a07 2172 */
78a58246 2173static int fcoe_destroy(struct net_device *netdev)
85b4aa49 2174{
619fe4be 2175 struct fcoe_ctlr *ctlr;
030f4e00 2176 struct fcoe_interface *fcoe;
f04ca1b6 2177 struct fc_lport *lport;
b2085a4e 2178 struct fcoe_port *port;
8eca355f 2179 int rc = 0;
85b4aa49 2180
dfc1d0fe 2181 mutex_lock(&fcoe_config_mutex);
ee5df628 2182 rtnl_lock();
2e70e241
CL		 2183 fcoe = fcoe_hostlist_lookup_port(netdev);
2184 if (!fcoe) {
85b4aa49 2185 rc = -ENODEV;
78a58246 2186 goto out_nodev;
85b4aa49 2187 }
619fe4be
RL		 2188 ctlr = fcoe_to_ctlr(fcoe);
2189 lport = ctlr->lp;
b2085a4e 2190 port = lport_priv(lport);
54a5b21d 2191 list_del(&fcoe->list);
b2085a4e 2192 queue_work(fcoe_wq, &port->destroy_work);
85b4aa49 2193out_nodev:
b2085a4e 2194 rtnl_unlock();
dfc1d0fe 2195 mutex_unlock(&fcoe_config_mutex);
85b4aa49
RL		 2196 return rc;
2197}
2198
1875f27e
RL		 2199/**
2200 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
2201 * @work: Handle to the FCoE port to be destroyed
2202 */
2e70e241
CL		 2203static void fcoe_destroy_work(struct work_struct *work)
2204{
f9c4358e
RL		 2205 struct fcoe_ctlr_device *cdev;
2206 struct fcoe_ctlr *ctlr;
2e70e241 2207 struct fcoe_port *port;
b2085a4e 2208 struct fcoe_interface *fcoe;
94aa743a
NP		 2209 struct Scsi_Host *shost;
2210 struct fc_host_attrs *fc_host;
2211 unsigned long flags;
2212 struct fc_vport *vport;
2213 struct fc_vport *next_vport;
2e70e241
CL		 2214
2215 port = container_of(work, struct fcoe_port, destroy_work);
94aa743a
NP		 2216 shost = port->lport->host;
2217 fc_host = shost_to_fc_host(shost);
2218
2219 /* Loop through all the vports and mark them for deletion */
2220 spin_lock_irqsave(shost->host_lock, flags);
2221 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
2222 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
2223 continue;
2224 } else {
2225 vport->flags |= FC_VPORT_DELETING;
2226 queue_work(fc_host_work_q(shost),
2227 &vport->vport_delete_work);
2228 }
2229 }
2230 spin_unlock_irqrestore(shost->host_lock, flags);
2231
2232 flush_workqueue(fc_host_work_q(shost));
2233
2e70e241 2234 mutex_lock(&fcoe_config_mutex);
b2085a4e 2235
b2085a4e 2236 fcoe = port->priv;
f9c4358e
RL		 2237 ctlr = fcoe_to_ctlr(fcoe);
2238 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2239
2e70e241 2240 fcoe_if_destroy(port->lport);
ccefd23e 2241 fcoe_interface_cleanup(fcoe);
b2085a4e 2242
2e70e241 2243 mutex_unlock(&fcoe_config_mutex);
f9c4358e
RL		 2244
2245 fcoe_ctlr_device_delete(cdev);
2e70e241
CL		 2246}
2247
78a58246
YZ		 2248/**
2249 * fcoe_match() - Check if the FCoE is supported on the given netdevice
2250 * @netdev : The net_device object the Ethernet interface to create on
2251 *
2252 * Called from fcoe transport.
2253 *
2254 * Returns: always returns true as this is the default FCoE transport,
2255 * i.e., support all netdevs.
2256 */
2257static bool fcoe_match(struct net_device *netdev)
2258{
2259 return true;
2260}
2261
6f6c2aa3 2262/**
2263 * fcoe_dcb_create() - Initialize DCB attributes and hooks
2264 * @netdev: The net_device object of the L2 link that should be queried
2265 * @port: The fcoe_port to bind FCoE APP priority with
2266 * @
2267 */
2268static void fcoe_dcb_create(struct fcoe_interface *fcoe)
2269{
2270#ifdef CONFIG_DCB
2271 int dcbx;
2272 u8 fup, up;
2273 struct net_device *netdev = fcoe->realdev;
619fe4be 2274 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
6f6c2aa3 2275 struct dcb_app app = {
2276 .priority = 0,
2277 .protocol = ETH_P_FCOE
2278 };
2279
2280 /* setup DCB priority attributes. */
2281 if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) {
2282 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
2283
2284 if (dcbx & DCB_CAP_DCBX_VER_IEEE) {
2285 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
2286 up = dcb_ieee_getapp_mask(netdev, &app);
2287 app.protocol = ETH_P_FIP;
2288 fup = dcb_ieee_getapp_mask(netdev, &app);
2289 } else {
2290 app.selector = DCB_APP_IDTYPE_ETHTYPE;
2291 up = dcb_getapp(netdev, &app);
2292 app.protocol = ETH_P_FIP;
2293 fup = dcb_getapp(netdev, &app);
2294 }
2295
31c37a6f
NP		 2296 fcoe->priority = ffs(up) ? ffs(up) - 1 : 0;
2297 ctlr->priority = ffs(fup) ? ffs(fup) - 1 : fcoe->priority;
6f6c2aa3 2298 }
2299#endif
2300}
2301
435c8667
RL		 2302enum fcoe_create_link_state {
2303 FCOE_CREATE_LINK_DOWN,
2304 FCOE_CREATE_LINK_UP,
2305};
2306
85b4aa49 2307/**
435c8667
RL		 2308 * _fcoe_create() - (internal) Create a fcoe interface
2309 * @netdev : The net_device object the Ethernet interface to create on
2310 * @fip_mode: The FIP mode for this creation
2311 * @link_state: The ctlr link state on creation
1875f27e 2312 *
435c8667
RL		 2313 * Called from either the libfcoe 'create' module parameter
2314 * via fcoe_create or from fcoe_syfs's ctlr_create file.
85b4aa49 2315 *
435c8667
RL		 2316 * libfcoe's 'create' module parameter is deprecated so some
2317 * consolidation of code can be done when that interface is
2318 * removed.
34f42a07 2319 */
435c8667
RL		 2320static int _fcoe_create(struct net_device *netdev, enum fip_state fip_mode,
2321 enum fcoe_create_link_state link_state)
85b4aa49 2322{
b2085a4e 2323 int rc = 0;
8d55e507 2324 struct fcoe_ctlr_device *ctlr_dev;
619fe4be 2325 struct fcoe_ctlr *ctlr;
030f4e00 2326 struct fcoe_interface *fcoe;
af7f85d9 2327 struct fc_lport *lport;
85b4aa49 2328
dfc1d0fe 2329 mutex_lock(&fcoe_config_mutex);
ee5df628 2330 rtnl_lock();
34ce27bc 2331
85b4aa49
RL		 2332 /* look for existing lport */
2333 if (fcoe_hostlist_lookup(netdev)) {
2334 rc = -EEXIST;
78a58246 2335 goto out_nodev;
85b4aa49 2336 }
85b4aa49 2337
1dd454d9 2338 fcoe = fcoe_interface_create(netdev, fip_mode);
7287fb91
RL		 2339 if (IS_ERR(fcoe)) {
2340 rc = PTR_ERR(fcoe);
78a58246 2341 goto out_nodev;
030f4e00
CL		 2342 }
2343
619fe4be 2344 ctlr = fcoe_to_ctlr(fcoe);
8d55e507
RL		 2345 ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr);
2346 lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0);
af7f85d9 2347 if (IS_ERR(lport)) {
d5488eb9 2348 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
85b4aa49 2349 netdev->name);
85b4aa49 2350 rc = -EIO;
848e7d5b 2351 rtnl_unlock();
2e70e241 2352 fcoe_interface_cleanup(fcoe);
f9c4358e
RL		 2353 mutex_unlock(&fcoe_config_mutex);
2354 fcoe_ctlr_device_delete(ctlr_dev);
2355 goto out;
85b4aa49 2356 }
030f4e00 2357
54b649f8 2358 /* Make this the "master" N_Port */
619fe4be 2359 ctlr->lp = lport;
54b649f8 2360
6f6c2aa3 2361 /* setup DCB priority attributes. */
2362 fcoe_dcb_create(fcoe);
2363
54b649f8
CL		 2364 /* start FIP Discovery and FLOGI */
2365 lport->boot_time = jiffies;
2366 fc_fabric_login(lport);
435c8667
RL		 2367
2368 /*
2369 * If the fcoe_ctlr_device is to be set to DISABLED
2370 * it must be done after the lport is added to the
2371 * hostlist, but before the rtnl_lock is released.
2372 * This is because the rtnl_lock protects the
2373 * hostlist that fcoe_device_notification uses. If
2374 * the FCoE Controller is intended to be created
2375 * DISABLED then 'enabled' needs to be considered
2376 * handling link events. 'enabled' must be set
2377 * before the lport can be found in the hostlist
2378 * when a link up event is received.
2379 */
2380 if (link_state == FCOE_CREATE_LINK_UP)
2381 ctlr_dev->enabled = FCOE_CTLR_ENABLED;
2382 else
2383 ctlr_dev->enabled = FCOE_CTLR_DISABLED;
2384
2385 if (link_state == FCOE_CREATE_LINK_UP &&
2386 !fcoe_link_ok(lport)) {
22805123 2387 rtnl_unlock();
619fe4be 2388 fcoe_ctlr_link_up(ctlr);
22805123
RL		 2389 mutex_unlock(&fcoe_config_mutex);
2390 return rc;
2391 }
030f4e00 2392
85b4aa49 2393out_nodev:
34ce27bc 2394 rtnl_unlock();
dfc1d0fe 2395 mutex_unlock(&fcoe_config_mutex);
f9c4358e 2396out:
85b4aa49
RL		 2397 return rc;
2398}
2399
435c8667
RL		 2400/**
2401 * fcoe_create() - Create a fcoe interface
2402 * @netdev : The net_device object the Ethernet interface to create on
2403 * @fip_mode: The FIP mode for this creation
2404 *
2405 * Called from fcoe transport
2406 *
2407 * Returns: 0 for success
2408 */
2409static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode)
2410{
2411 return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP);
2412}
2413
2414/**
2415 * fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs
2416 * @netdev: The net_device to be used by the allocated FCoE Controller
2417 *
2418 * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr
2419 * in a link_down state. The allows the user an opportunity to configure
2420 * the FCoE Controller from sysfs before enabling the FCoE Controller.
2421 *
2422 * Creating in with this routine starts the FCoE Controller in Fabric
2423 * mode. The user can change to VN2VN or another mode before enabling.
2424 */
2425static int fcoe_ctlr_alloc(struct net_device *netdev)
2426{
2427 return _fcoe_create(netdev, FIP_MODE_FABRIC,
2428 FCOE_CREATE_LINK_DOWN);
2429}
2430
5e4f8fe7
RL		 2431/**
2432 * fcoe_link_ok() - Check if the link is OK for a local port
2433 * @lport: The local port to check link on
2434 *
2435 * Returns: 0 if link is UP and OK, -1 if not
2436 *
2437 */
7c9c6841 2438static int fcoe_link_ok(struct fc_lport *lport)
5e4f8fe7 2439{
8597ae8b 2440 struct net_device *netdev = fcoe_netdev(lport);
5e4f8fe7
RL		 2441
2442 if (netif_oper_up(netdev))
2443 return 0;
2444 return -1;
2445}
2446
34f42a07 2447/**
1875f27e
RL		 2448 * fcoe_percpu_clean() - Clear all pending skbs for an local port
2449 * @lport: The local port whose skbs are to be cleared
e7a51997
JE		 2450 *
2451 * Must be called with fcoe_create_mutex held to single-thread completion.
2452 *
2453 * This flushes the pending skbs by adding a new skb to each queue and
2454 * waiting until they are all freed. This assures us that not only are
2455 * there no packets that will be handled by the lport, but also that any
2456 * threads already handling packet have returned.
85b4aa49 2457 */
7c9c6841 2458static void fcoe_percpu_clean(struct fc_lport *lport)
85b4aa49 2459{
85b4aa49 2460 struct fcoe_percpu_s *pp;
dd060e74 2461 struct sk_buff *skb;
5e5e92df 2462 unsigned int cpu;
85b4aa49 2463
5e5e92df
RL		 2464 for_each_possible_cpu(cpu) {
2465 pp = &per_cpu(fcoe_percpu, cpu);
e7a51997 2466
dd060e74 2467 if (!pp->thread || !cpu_online(cpu))
e7a51997 2468 continue;
e7a51997
JE		 2469
2470 skb = dev_alloc_skb(0);
b3b8abd8 2471 if (!skb)
e7a51997 2472 continue;
b3b8abd8 2473
e7a51997
JE		 2474 skb->destructor = fcoe_percpu_flush_done;
2475
dd060e74 2476 spin_lock_bh(&pp->fcoe_rx_list.lock);
e7a51997
JE		 2477 __skb_queue_tail(&pp->fcoe_rx_list, skb);
2478 if (pp->fcoe_rx_list.qlen == 1)
2479 wake_up_process(pp->thread);
5e5e92df 2480 spin_unlock_bh(&pp->fcoe_rx_list.lock);
e7a51997
JE		 2481
2482 wait_for_completion(&fcoe_flush_completion);
85b4aa49
RL		 2483 }
2484}
85b4aa49 2485
34f42a07 2486/**
1875f27e
RL		 2487 * fcoe_reset() - Reset a local port
2488 * @shost: The SCSI host associated with the local port to be reset
85b4aa49 2489 *
1875f27e 2490 * Returns: Always 0 (return value required by FC transport template)
85b4aa49 2491 */
7c9c6841 2492static int fcoe_reset(struct Scsi_Host *shost)
85b4aa49
RL		 2493{
2494 struct fc_lport *lport = shost_priv(shost);
d2f80952
VD		 2495 struct fcoe_port *port = lport_priv(lport);
2496 struct fcoe_interface *fcoe = port->priv;
619fe4be 2497 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
435c8667 2498 struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
d2f80952 2499
619fe4be
RL		 2500 fcoe_ctlr_link_down(ctlr);
2501 fcoe_clean_pending_queue(ctlr->lp);
435c8667
RL		 2502
2503 if (cdev->enabled != FCOE_CTLR_DISABLED &&
2504 !fcoe_link_ok(ctlr->lp))
619fe4be 2505 fcoe_ctlr_link_up(ctlr);
85b4aa49
RL		 2506 return 0;
2507}
85b4aa49 2508
34f42a07 2509/**
1875f27e
RL		 2510 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2511 * @netdev: The net device used as a key
85b4aa49 2512 *
1875f27e
RL		 2513 * Locking: Must be called with the RNL mutex held.
2514 *
2515 * Returns: NULL or the FCoE interface
85b4aa49 2516 */
014f5c3f 2517static struct fcoe_interface *
1875f27e 2518fcoe_hostlist_lookup_port(const struct net_device *netdev)
85b4aa49 2519{
014f5c3f 2520 struct fcoe_interface *fcoe;
85b4aa49 2521
014f5c3f 2522 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1875f27e 2523 if (fcoe->netdev == netdev)
014f5c3f 2524 return fcoe;
85b4aa49 2525 }
85b4aa49
RL		 2526 return NULL;
2527}
2528
34f42a07 2529/**
1875f27e
RL		 2530 * fcoe_hostlist_lookup() - Find the local port associated with a
2531 * given net device
2532 * @netdev: The netdevice used as a key
85b4aa49 2533 *
1875f27e
RL		 2534 * Locking: Must be called with the RTNL mutex held
2535 *
2536 * Returns: NULL or the local port
85b4aa49 2537 */
090eb6c4 2538static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
85b4aa49 2539{
619fe4be 2540 struct fcoe_ctlr *ctlr;
014f5c3f 2541 struct fcoe_interface *fcoe;
85b4aa49 2542
014f5c3f 2543 fcoe = fcoe_hostlist_lookup_port(netdev);
619fe4be
RL		 2544 ctlr = fcoe_to_ctlr(fcoe);
2545 return (fcoe) ? ctlr->lp : NULL;
85b4aa49 2546}
85b4aa49 2547
34f42a07 2548/**
1875f27e
RL		 2549 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2550 * port to the hostlist
2551 * @lport: The local port that identifies the FCoE interface to be added
85b4aa49 2552 *
090eb6c4 2553 * Locking: must be called with the RTNL mutex held
1875f27e
RL		 2554 *
2555 * Returns: 0 for success
85b4aa49 2556 */
090eb6c4 2557static int fcoe_hostlist_add(const struct fc_lport *lport)
85b4aa49 2558{
014f5c3f
CL		 2559 struct fcoe_interface *fcoe;
2560 struct fcoe_port *port;
2561
2562 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2563 if (!fcoe) {
2564 port = lport_priv(lport);
8597ae8b 2565 fcoe = port->priv;
014f5c3f 2566 list_add_tail(&fcoe->list, &fcoe_hostlist);
85b4aa49
RL		 2567 }
2568 return 0;
2569}
85b4aa49 2570
f9184df3
NH		 2571/**
2572 * fcoe_hostlist_del() - Remove the FCoE interface identified by a local
2573 * port to the hostlist
2574 * @lport: The local port that identifies the FCoE interface to be added
2575 *
2576 * Locking: must be called with the RTNL mutex held
2577 *
2578 */
2579static void fcoe_hostlist_del(const struct fc_lport *lport)
2580{
2581 struct fcoe_interface *fcoe;
2582 struct fcoe_port *port;
2583
2584 port = lport_priv(lport);
2585 fcoe = port->priv;
2586 list_del(&fcoe->list);
2587 return;
2588}
78a58246
YZ		 2589
2590static struct fcoe_transport fcoe_sw_transport = {
2591 .name = {FCOE_TRANSPORT_DEFAULT},
2592 .attached = false,
2593 .list = LIST_HEAD_INIT(fcoe_sw_transport.list),
2594 .match = fcoe_match,
435c8667 2595 .alloc = fcoe_ctlr_alloc,
78a58246
YZ		 2596 .create = fcoe_create,
2597 .destroy = fcoe_destroy,
2598 .enable = fcoe_enable,
2599 .disable = fcoe_disable,
2600};
2601
85b4aa49 2602/**
1875f27e 2603 * fcoe_init() - Initialize fcoe.ko
85b4aa49 2604 *
1875f27e 2605 * Returns: 0 on success, or a negative value on failure
34f42a07 2606 */
85b4aa49
RL		 2607static int __init fcoe_init(void)
2608{
1875f27e 2609 struct fcoe_percpu_s *p;
38eccabd 2610 unsigned int cpu;
8976f424 2611 int rc = 0;
85b4aa49 2612
2ca32b48
TH		 2613 fcoe_wq = alloc_workqueue("fcoe", 0, 0);
2614 if (!fcoe_wq)
2615 return -ENOMEM;
2616
78a58246
YZ		 2617 /* register as a fcoe transport */
2618 rc = fcoe_transport_attach(&fcoe_sw_transport);
2619 if (rc) {
2620 printk(KERN_ERR "failed to register an fcoe transport, check "
2621 "if libfcoe is loaded\n");
2622 return rc;
2623 }
2624
dfc1d0fe
CL		 2625 mutex_lock(&fcoe_config_mutex);
2626
38eccabd 2627 for_each_possible_cpu(cpu) {
5e5e92df 2628 p = &per_cpu(fcoe_percpu, cpu);
38eccabd
RL		 2629 skb_queue_head_init(&p->fcoe_rx_list);
2630 }
2631
cd45ae38
SB		 2632 cpu_notifier_register_begin();
2633
8976f424
RL		 2634 for_each_online_cpu(cpu)
2635 fcoe_percpu_thread_create(cpu);
85b4aa49 2636
8976f424 2637 /* Initialize per CPU interrupt thread */
cd45ae38 2638 rc = __register_hotcpu_notifier(&fcoe_cpu_notifier);
8976f424
RL		 2639 if (rc)
2640 goto out_free;
85b4aa49 2641
cd45ae38
SB		 2642 cpu_notifier_register_done();
2643
8976f424 2644 /* Setup link change notification */
85b4aa49
RL		 2645 fcoe_dev_setup();
2646
5892c32f
CL		 2647 rc = fcoe_if_init();
2648 if (rc)
2649 goto out_free;
85b4aa49 2650
dfc1d0fe 2651 mutex_unlock(&fcoe_config_mutex);
85b4aa49 2652 return 0;
8976f424
RL		 2653
2654out_free:
2655 for_each_online_cpu(cpu) {
2656 fcoe_percpu_thread_destroy(cpu);
2657 }
cd45ae38
SB		 2658
2659 cpu_notifier_register_done();
2660
dfc1d0fe 2661 mutex_unlock(&fcoe_config_mutex);
2ca32b48 2662 destroy_workqueue(fcoe_wq);
8976f424 2663 return rc;
85b4aa49
RL		 2664}
2665module_init(fcoe_init);
2666
2667/**
1875f27e 2668 * fcoe_exit() - Clean up fcoe.ko
85b4aa49 2669 *
1875f27e 2670 * Returns: 0 on success or a negative value on failure
34f42a07 2671 */
85b4aa49
RL		 2672static void __exit fcoe_exit(void)
2673{
014f5c3f 2674 struct fcoe_interface *fcoe, *tmp;
619fe4be 2675 struct fcoe_ctlr *ctlr;
2e70e241 2676 struct fcoe_port *port;
1875f27e 2677 unsigned int cpu;
85b4aa49 2678
dfc1d0fe
CL		 2679 mutex_lock(&fcoe_config_mutex);
2680
85b4aa49
RL		 2681 fcoe_dev_cleanup();
2682
5919a595 2683 /* releases the associated fcoe hosts */
090eb6c4
CL		 2684 rtnl_lock();
2685 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
619fe4be
RL		 2686 ctlr = fcoe_to_ctlr(fcoe);
2687 port = lport_priv(ctlr->lp);
f9184df3 2688 fcoe_hostlist_del(port->lport);
2ca32b48 2689 queue_work(fcoe_wq, &port->destroy_work);
c863df33 2690 }
090eb6c4 2691 rtnl_unlock();
85b4aa49 2692
cd45ae38 2693 cpu_notifier_register_begin();
8976f424 2694
014f5c3f 2695 for_each_online_cpu(cpu)
8976f424 2696 fcoe_percpu_thread_destroy(cpu);
85b4aa49 2697
cd45ae38
SB		 2698 __unregister_hotcpu_notifier(&fcoe_cpu_notifier);
2699
2700 cpu_notifier_register_done();
2701
dfc1d0fe 2702 mutex_unlock(&fcoe_config_mutex);
2e70e241 2703
2ca32b48
TH		 2704 /*
2705 * destroy_work's may be chained but destroy_workqueue()
2706 * can take care of them. Just kill the fcoe_wq.
2707 */
2708 destroy_workqueue(fcoe_wq);
2e70e241 2709
2ca32b48
TH		 2710 /*
2711 * Detaching from the scsi transport must happen after all
2712 * destroys are done on the fcoe_wq. destroy_workqueue will
2713 * enusre the fcoe_wq is flushed.
2714 */
2e70e241 2715 fcoe_if_exit();
78a58246
YZ		 2716
2717 /* detach from fcoe transport */
2718 fcoe_transport_detach(&fcoe_sw_transport);
85b4aa49
RL		 2719}
2720module_exit(fcoe_exit);
11b56188
CL		 2721
2722/**
2723 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2724 * @seq: active sequence in the FLOGI or FDISC exchange
2725 * @fp: response frame, or error encoded in a pointer (timeout)
2726 * @arg: pointer the the fcoe_ctlr structure
2727 *
65155b37 2728 * This handles MAC address management for FCoE, then passes control on to
11b56188
CL		 2729 * the libfc FLOGI response handler.
2730 */
2731static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2732{
2733 struct fcoe_ctlr *fip = arg;
2734 struct fc_exch *exch = fc_seq_exch(seq);
2735 struct fc_lport *lport = exch->lp;
2736 u8 *mac;
2737
2738 if (IS_ERR(fp))
2739 goto done;
2740
2741 mac = fr_cb(fp)->granted_mac;
907c07d4
VD		 2742 /* pre-FIP */
2743 if (is_zero_ether_addr(mac))
2744 fcoe_ctlr_recv_flogi(fip, lport, fp);
2745 if (!is_zero_ether_addr(mac))
2746 fcoe_update_src_mac(lport, mac);
11b56188
CL		 2747done:
2748 fc_lport_flogi_resp(seq, fp, lport);
2749}
2750
2751/**
2752 * fcoe_logo_resp() - FCoE specific LOGO response handler
2753 * @seq: active sequence in the LOGO exchange
2754 * @fp: response frame, or error encoded in a pointer (timeout)
2755 * @arg: pointer the the fcoe_ctlr structure
2756 *
65155b37 2757 * This handles MAC address management for FCoE, then passes control on to
11b56188
CL		 2758 * the libfc LOGO response handler.
2759 */
2760static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2761{
386309ce 2762 struct fc_lport *lport = arg;
11b56188
CL		 2763 static u8 zero_mac[ETH_ALEN] = { 0 };
2764
2765 if (!IS_ERR(fp))
386309ce 2766 fcoe_update_src_mac(lport, zero_mac);
11b56188
CL		 2767 fc_lport_logo_resp(seq, fp, lport);
2768}
2769
2770/**
2771 * fcoe_elsct_send - FCoE specific ELS handler
2772 *
2773 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2774 * using FCoE specific response handlers and passing the FIP controller as
2775 * the argument (the lport is still available from the exchange).
2776 *
2777 * Most of the work here is just handed off to the libfc routine.
2778 */
1875f27e
RL		 2779static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2780 struct fc_frame *fp, unsigned int op,
2781 void (*resp)(struct fc_seq *,
2782 struct fc_frame *,
2783 void *),
2784 void *arg, u32 timeout)
11b56188
CL		 2785{
2786 struct fcoe_port *port = lport_priv(lport);
8597ae8b 2787 struct fcoe_interface *fcoe = port->priv;
619fe4be 2788 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
11b56188
CL		 2789 struct fc_frame_header *fh = fc_frame_header_get(fp);
2790
2791 switch (op) {
2792 case ELS_FLOGI:
2793 case ELS_FDISC:
e10f8c66
JE		 2794 if (lport->point_to_multipoint)
2795 break;
11b56188
CL		 2796 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2797 fip, timeout);
2798 case ELS_LOGO:
2799 /* only hook onto fabric logouts, not port logouts */
2800 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2801 break;
2802 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
386309ce 2803 lport, timeout);
11b56188
CL		 2804 }
2805 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2806}
2807
9a05753b
CL		 2808/**
2809 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2810 * @vport: fc_vport object to create a new fc_host for
2811 * @disabled: start the new fc_host in a disabled state by default?
2812 *
2813 * Returns: 0 for success
2814 */
2815static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2816{
2817 struct Scsi_Host *shost = vport_to_shost(vport);
2818 struct fc_lport *n_port = shost_priv(shost);
2819 struct fcoe_port *port = lport_priv(n_port);
8597ae8b 2820 struct fcoe_interface *fcoe = port->priv;
9a05753b
CL		 2821 struct net_device *netdev = fcoe->netdev;
2822 struct fc_lport *vn_port;
bdf25218
NP		 2823 int rc;
2824 char buf[32];
2825
2826 rc = fcoe_validate_vport_create(vport);
2827 if (rc) {
d834895c 2828 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
bdf25218
NP		 2829 printk(KERN_ERR "fcoe: Failed to create vport, "
2830 "WWPN (0x%s) already exists\n",
2831 buf);
2832 return rc;
2833 }
9a05753b
CL		 2834
2835 mutex_lock(&fcoe_config_mutex);
4bc71cb9 2836 rtnl_lock();
9a05753b 2837 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
4bc71cb9 2838 rtnl_unlock();
9a05753b
CL		 2839 mutex_unlock(&fcoe_config_mutex);
2840
2841 if (IS_ERR(vn_port)) {
2842 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2843 netdev->name);
2844 return -EIO;
2845 }
2846
2847 if (disabled) {
2848 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2849 } else {
2850 vn_port->boot_time = jiffies;
2851 fc_fabric_login(vn_port);
2852 fc_vport_setlink(vn_port);
2853 }
2854 return 0;
2855}
2856
2857/**
2858 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2859 * @vport: fc_vport object that is being destroyed
2860 *
2861 * Returns: 0 for success
2862 */
2863static int fcoe_vport_destroy(struct fc_vport *vport)
2864{
2865 struct Scsi_Host *shost = vport_to_shost(vport);
2866 struct fc_lport *n_port = shost_priv(shost);
2867 struct fc_lport *vn_port = vport->dd_data;
9a05753b
CL		 2868
2869 mutex_lock(&n_port->lp_mutex);
2870 list_del(&vn_port->list);
2871 mutex_unlock(&n_port->lp_mutex);
ccefd23e
RL		 2872
2873 mutex_lock(&fcoe_config_mutex);
2874 fcoe_if_destroy(vn_port);
2875 mutex_unlock(&fcoe_config_mutex);
2876
9a05753b
CL		 2877 return 0;
2878}
2879
2880/**
2881 * fcoe_vport_disable() - change vport state
2882 * @vport: vport to bring online/offline
2883 * @disable: should the vport be disabled?
2884 */
2885static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2886{
2887 struct fc_lport *lport = vport->dd_data;
2888
2889 if (disable) {
2890 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2891 fc_fabric_logoff(lport);
2892 } else {
2893 lport->boot_time = jiffies;
2894 fc_fabric_login(lport);
2895 fc_vport_setlink(lport);
2896 }
2897
2898 return 0;
2899}
2900
dc8596d3
CL		 2901/**
2902 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2903 * @vport: fc_vport with a new symbolic name string
2904 *
2905 * After generating a new symbolic name string, a new RSPN_ID request is
2906 * sent to the name server. There is no response handler, so if it fails
2907 * for some reason it will not be retried.
2908 */
2909static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2910{
2911 struct fc_lport *lport = vport->dd_data;
2912 struct fc_frame *fp;
2913 size_t len;
2914
2915 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2916 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2917 fcoe_netdev(lport)->name, vport->symbolic_name);
2918
2919 if (lport->state != LPORT_ST_READY)
2920 return;
2921
2922 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2923 fp = fc_frame_alloc(lport,
2924 sizeof(struct fc_ct_hdr) +
2925 sizeof(struct fc_ns_rspn) + len);
2926 if (!fp)
2927 return;
2928 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
b94f8951 2929 NULL, NULL, 3 * lport->r_a_tov);
dc8596d3 2930}
b84056bf 2931
8d55e507
RL		 2932static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev)
2933{
2934 struct fcoe_ctlr_device *ctlr_dev =
2935 fcoe_fcf_dev_to_ctlr_dev(fcf_dev);
2936 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
2937 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);
2938
2939 fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev);
2940}
2941
7d65b0df
JE		 2942/**
2943 * fcoe_set_port_id() - Callback from libfc when Port_ID is set.
2944 * @lport: the local port
2945 * @port_id: the port ID
2946 * @fp: the received frame, if any, that caused the port_id to be set.
2947 *
2948 * This routine handles the case where we received a FLOGI and are
2949 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi()
2950 * so it can set the non-mapped mode and gateway address.
2951 *
2952 * The FLOGI LS_ACC is handled by fcoe_flogi_resp().
2953 */
2954static void fcoe_set_port_id(struct fc_lport *lport,
2955 u32 port_id, struct fc_frame *fp)
2956{
2957 struct fcoe_port *port = lport_priv(lport);
8597ae8b 2958 struct fcoe_interface *fcoe = port->priv;
619fe4be 2959 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
7d65b0df
JE		 2960
2961 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
619fe4be 2962 fcoe_ctlr_recv_flogi(ctlr, lport, fp);
7d65b0df 2963}
Linux kernel - Deliverables
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