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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> | |
21 | #include <linux/version.h> | |
85b4aa49 | 22 | #include <linux/spinlock.h> |
85b4aa49 RL |
23 | #include <linux/netdevice.h> |
24 | #include <linux/etherdevice.h> | |
25 | #include <linux/ethtool.h> | |
26 | #include <linux/if_ether.h> | |
27 | #include <linux/if_vlan.h> | |
85b4aa49 RL |
28 | #include <linux/crc32.h> |
29 | #include <linux/cpu.h> | |
30 | #include <linux/fs.h> | |
31 | #include <linux/sysfs.h> | |
32 | #include <linux/ctype.h> | |
33 | #include <scsi/scsi_tcq.h> | |
34 | #include <scsi/scsicam.h> | |
35 | #include <scsi/scsi_transport.h> | |
36 | #include <scsi/scsi_transport_fc.h> | |
37 | #include <net/rtnetlink.h> | |
38 | ||
39 | #include <scsi/fc/fc_encaps.h> | |
97c8389d | 40 | #include <scsi/fc/fc_fip.h> |
85b4aa49 RL |
41 | |
42 | #include <scsi/libfc.h> | |
43 | #include <scsi/fc_frame.h> | |
44 | #include <scsi/libfcoe.h> | |
85b4aa49 | 45 | |
fdd78027 | 46 | #include "fcoe.h" |
7f349142 | 47 | |
85b4aa49 RL |
48 | MODULE_AUTHOR("Open-FCoE.org"); |
49 | MODULE_DESCRIPTION("FCoE"); | |
9b34ecff | 50 | MODULE_LICENSE("GPL v2"); |
85b4aa49 | 51 | |
05cc7390 YZ |
52 | /* Performance tuning parameters for fcoe */ |
53 | static unsigned int fcoe_ddp_min; | |
54 | module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR); | |
55 | MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \ | |
56 | "Direct Data Placement (DDP)."); | |
57 | ||
dfc1d0fe CL |
58 | DEFINE_MUTEX(fcoe_config_mutex); |
59 | ||
e7a51997 JE |
60 | /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */ |
61 | static DECLARE_COMPLETION(fcoe_flush_completion); | |
62 | ||
85b4aa49 | 63 | /* fcoe host list */ |
090eb6c4 | 64 | /* must only by accessed under the RTNL mutex */ |
85b4aa49 | 65 | LIST_HEAD(fcoe_hostlist); |
5e5e92df | 66 | DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu); |
85b4aa49 | 67 | |
dd3fd72e | 68 | /* Function Prototypes */ |
1875f27e | 69 | static int fcoe_reset(struct Scsi_Host *); |
fdd78027 VD |
70 | static int fcoe_xmit(struct fc_lport *, struct fc_frame *); |
71 | static int fcoe_rcv(struct sk_buff *, struct net_device *, | |
72 | struct packet_type *, struct net_device *); | |
1875f27e RL |
73 | static int fcoe_percpu_receive_thread(void *); |
74 | static void fcoe_clean_pending_queue(struct fc_lport *); | |
75 | static void fcoe_percpu_clean(struct fc_lport *); | |
76 | static int fcoe_link_ok(struct fc_lport *); | |
fdd78027 VD |
77 | |
78 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); | |
79 | static int fcoe_hostlist_add(const struct fc_lport *); | |
fdd78027 | 80 | |
4bb6b515 | 81 | static void fcoe_check_wait_queue(struct fc_lport *, struct sk_buff *); |
85b4aa49 RL |
82 | static int fcoe_device_notification(struct notifier_block *, ulong, void *); |
83 | static void fcoe_dev_setup(void); | |
84 | static void fcoe_dev_cleanup(void); | |
1875f27e RL |
85 | static struct fcoe_interface |
86 | *fcoe_hostlist_lookup_port(const struct net_device *); | |
87 | ||
88 | static int fcoe_fip_recv(struct sk_buff *, struct net_device *, | |
89 | struct packet_type *, struct net_device *); | |
90 | ||
91 | static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *); | |
92 | static void fcoe_update_src_mac(struct fc_lport *, u8 *); | |
93 | static u8 *fcoe_get_src_mac(struct fc_lport *); | |
94 | static void fcoe_destroy_work(struct work_struct *); | |
95 | ||
96 | static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *, | |
97 | unsigned int); | |
98 | static int fcoe_ddp_done(struct fc_lport *, u16); | |
99 | ||
100 | static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *); | |
101 | ||
102 | static int fcoe_create(const char *, struct kernel_param *); | |
103 | static int fcoe_destroy(const char *, struct kernel_param *); | |
104 | ||
1875f27e RL |
105 | static struct fc_seq *fcoe_elsct_send(struct fc_lport *, |
106 | u32 did, struct fc_frame *, | |
107 | unsigned int op, | |
108 | void (*resp)(struct fc_seq *, | |
109 | struct fc_frame *, | |
110 | void *), | |
111 | void *, u32 timeout); | |
112 | ||
113 | module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR); | |
114 | __MODULE_PARM_TYPE(create, "string"); | |
115 | MODULE_PARM_DESC(create, "Create fcoe fcoe using net device passed in."); | |
116 | module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR); | |
117 | __MODULE_PARM_TYPE(destroy, "string"); | |
118 | MODULE_PARM_DESC(destroy, "Destroy fcoe fcoe"); | |
119 | ||
120 | /* notification function for packets from net device */ | |
85b4aa49 RL |
121 | static struct notifier_block fcoe_notifier = { |
122 | .notifier_call = fcoe_device_notification, | |
123 | }; | |
124 | ||
1875f27e RL |
125 | /* notification function for CPU hotplug events */ |
126 | static struct notifier_block fcoe_cpu_notifier = { | |
127 | .notifier_call = fcoe_cpu_callback, | |
128 | }; | |
129 | ||
e9084bb8 CL |
130 | static struct scsi_transport_template *fcoe_transport_template; |
131 | static struct scsi_transport_template *fcoe_vport_transport_template; | |
7f349142 | 132 | |
1875f27e RL |
133 | static int fcoe_vport_destroy(struct fc_vport *); |
134 | static int fcoe_vport_create(struct fc_vport *, bool disabled); | |
135 | static int fcoe_vport_disable(struct fc_vport *, bool disable); | |
136 | static void fcoe_set_vport_symbolic_name(struct fc_vport *); | |
137 | ||
138 | static struct libfc_function_template fcoe_libfc_fcn_templ = { | |
139 | .frame_send = fcoe_xmit, | |
140 | .ddp_setup = fcoe_ddp_setup, | |
141 | .ddp_done = fcoe_ddp_done, | |
142 | .elsct_send = fcoe_elsct_send, | |
143 | }; | |
9a05753b | 144 | |
7f349142 VD |
145 | struct fc_function_template fcoe_transport_function = { |
146 | .show_host_node_name = 1, | |
147 | .show_host_port_name = 1, | |
148 | .show_host_supported_classes = 1, | |
149 | .show_host_supported_fc4s = 1, | |
150 | .show_host_active_fc4s = 1, | |
151 | .show_host_maxframe_size = 1, | |
152 | ||
153 | .show_host_port_id = 1, | |
154 | .show_host_supported_speeds = 1, | |
155 | .get_host_speed = fc_get_host_speed, | |
156 | .show_host_speed = 1, | |
157 | .show_host_port_type = 1, | |
158 | .get_host_port_state = fc_get_host_port_state, | |
159 | .show_host_port_state = 1, | |
160 | .show_host_symbolic_name = 1, | |
161 | ||
162 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
163 | .show_rport_maxframe_size = 1, | |
164 | .show_rport_supported_classes = 1, | |
165 | ||
166 | .show_host_fabric_name = 1, | |
167 | .show_starget_node_name = 1, | |
168 | .show_starget_port_name = 1, | |
169 | .show_starget_port_id = 1, | |
170 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
171 | .show_rport_dev_loss_tmo = 1, | |
172 | .get_fc_host_stats = fc_get_host_stats, | |
173 | .issue_fc_host_lip = fcoe_reset, | |
174 | ||
175 | .terminate_rport_io = fc_rport_terminate_io, | |
9a05753b CL |
176 | |
177 | .vport_create = fcoe_vport_create, | |
178 | .vport_delete = fcoe_vport_destroy, | |
179 | .vport_disable = fcoe_vport_disable, | |
dc8596d3 | 180 | .set_vport_symbolic_name = fcoe_set_vport_symbolic_name, |
a51ab396 SM |
181 | |
182 | .bsg_request = fc_lport_bsg_request, | |
7f349142 VD |
183 | }; |
184 | ||
e9084bb8 CL |
185 | struct fc_function_template fcoe_vport_transport_function = { |
186 | .show_host_node_name = 1, | |
187 | .show_host_port_name = 1, | |
188 | .show_host_supported_classes = 1, | |
189 | .show_host_supported_fc4s = 1, | |
190 | .show_host_active_fc4s = 1, | |
191 | .show_host_maxframe_size = 1, | |
192 | ||
193 | .show_host_port_id = 1, | |
194 | .show_host_supported_speeds = 1, | |
195 | .get_host_speed = fc_get_host_speed, | |
196 | .show_host_speed = 1, | |
197 | .show_host_port_type = 1, | |
198 | .get_host_port_state = fc_get_host_port_state, | |
199 | .show_host_port_state = 1, | |
200 | .show_host_symbolic_name = 1, | |
201 | ||
202 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
203 | .show_rport_maxframe_size = 1, | |
204 | .show_rport_supported_classes = 1, | |
205 | ||
206 | .show_host_fabric_name = 1, | |
207 | .show_starget_node_name = 1, | |
208 | .show_starget_port_name = 1, | |
209 | .show_starget_port_id = 1, | |
210 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
211 | .show_rport_dev_loss_tmo = 1, | |
212 | .get_fc_host_stats = fc_get_host_stats, | |
213 | .issue_fc_host_lip = fcoe_reset, | |
214 | ||
215 | .terminate_rport_io = fc_rport_terminate_io, | |
a51ab396 SM |
216 | |
217 | .bsg_request = fc_lport_bsg_request, | |
e9084bb8 CL |
218 | }; |
219 | ||
7f349142 VD |
220 | static struct scsi_host_template fcoe_shost_template = { |
221 | .module = THIS_MODULE, | |
222 | .name = "FCoE Driver", | |
223 | .proc_name = FCOE_NAME, | |
224 | .queuecommand = fc_queuecommand, | |
225 | .eh_abort_handler = fc_eh_abort, | |
226 | .eh_device_reset_handler = fc_eh_device_reset, | |
227 | .eh_host_reset_handler = fc_eh_host_reset, | |
228 | .slave_alloc = fc_slave_alloc, | |
229 | .change_queue_depth = fc_change_queue_depth, | |
230 | .change_queue_type = fc_change_queue_type, | |
231 | .this_id = -1, | |
14caf44c | 232 | .cmd_per_lun = 3, |
7f349142 VD |
233 | .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, |
234 | .use_clustering = ENABLE_CLUSTERING, | |
235 | .sg_tablesize = SG_ALL, | |
236 | .max_sectors = 0xffff, | |
237 | }; | |
238 | ||
54b649f8 | 239 | /** |
1875f27e RL |
240 | * fcoe_interface_setup() - Setup a FCoE interface |
241 | * @fcoe: The new FCoE interface | |
242 | * @netdev: The net device that the fcoe interface is on | |
54b649f8 CL |
243 | * |
244 | * Returns : 0 for success | |
2e70e241 | 245 | * Locking: must be called with the RTNL mutex held |
54b649f8 CL |
246 | */ |
247 | static int fcoe_interface_setup(struct fcoe_interface *fcoe, | |
248 | struct net_device *netdev) | |
249 | { | |
250 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
251 | struct netdev_hw_addr *ha; | |
252 | u8 flogi_maddr[ETH_ALEN]; | |
b7a727f1 | 253 | const struct net_device_ops *ops; |
54b649f8 CL |
254 | |
255 | fcoe->netdev = netdev; | |
256 | ||
b7a727f1 YZ |
257 | /* Let LLD initialize for FCoE */ |
258 | ops = netdev->netdev_ops; | |
259 | if (ops->ndo_fcoe_enable) { | |
260 | if (ops->ndo_fcoe_enable(netdev)) | |
261 | FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE" | |
262 | " specific feature for LLD.\n"); | |
263 | } | |
264 | ||
54b649f8 CL |
265 | /* Do not support for bonding device */ |
266 | if ((netdev->priv_flags & IFF_MASTER_ALB) || | |
267 | (netdev->priv_flags & IFF_SLAVE_INACTIVE) || | |
268 | (netdev->priv_flags & IFF_MASTER_8023AD)) { | |
59d92516 | 269 | FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n"); |
54b649f8 CL |
270 | return -EOPNOTSUPP; |
271 | } | |
272 | ||
273 | /* look for SAN MAC address, if multiple SAN MACs exist, only | |
274 | * use the first one for SPMA */ | |
275 | rcu_read_lock(); | |
276 | for_each_dev_addr(netdev, ha) { | |
277 | if ((ha->type == NETDEV_HW_ADDR_T_SAN) && | |
278 | (is_valid_ether_addr(fip->ctl_src_addr))) { | |
279 | memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); | |
280 | fip->spma = 1; | |
281 | break; | |
282 | } | |
283 | } | |
284 | rcu_read_unlock(); | |
285 | ||
286 | /* setup Source Mac Address */ | |
287 | if (!fip->spma) | |
288 | memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); | |
289 | ||
290 | /* | |
291 | * Add FCoE MAC address as second unicast MAC address | |
292 | * or enter promiscuous mode if not capable of listening | |
293 | * for multiple unicast MACs. | |
294 | */ | |
54b649f8 CL |
295 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
296 | dev_unicast_add(netdev, flogi_maddr); | |
297 | if (fip->spma) | |
298 | dev_unicast_add(netdev, fip->ctl_src_addr); | |
299 | dev_mc_add(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0); | |
54b649f8 CL |
300 | |
301 | /* | |
302 | * setup the receive function from ethernet driver | |
303 | * on the ethertype for the given device | |
304 | */ | |
305 | fcoe->fcoe_packet_type.func = fcoe_rcv; | |
306 | fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE); | |
307 | fcoe->fcoe_packet_type.dev = netdev; | |
308 | dev_add_pack(&fcoe->fcoe_packet_type); | |
309 | ||
310 | fcoe->fip_packet_type.func = fcoe_fip_recv; | |
311 | fcoe->fip_packet_type.type = htons(ETH_P_FIP); | |
312 | fcoe->fip_packet_type.dev = netdev; | |
313 | dev_add_pack(&fcoe->fip_packet_type); | |
314 | ||
315 | return 0; | |
316 | } | |
317 | ||
030f4e00 | 318 | /** |
1875f27e RL |
319 | * fcoe_interface_create() - Create a FCoE interface on a net device |
320 | * @netdev: The net device to create the FCoE interface on | |
030f4e00 CL |
321 | * |
322 | * Returns: pointer to a struct fcoe_interface or NULL on error | |
323 | */ | |
324 | static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev) | |
325 | { | |
326 | struct fcoe_interface *fcoe; | |
59d92516 | 327 | int err; |
030f4e00 CL |
328 | |
329 | fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL); | |
330 | if (!fcoe) { | |
331 | FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n"); | |
332 | return NULL; | |
333 | } | |
334 | ||
2e70e241 | 335 | dev_hold(netdev); |
030f4e00 | 336 | kref_init(&fcoe->kref); |
54b649f8 CL |
337 | |
338 | /* | |
339 | * Initialize FIP. | |
340 | */ | |
341 | fcoe_ctlr_init(&fcoe->ctlr); | |
342 | fcoe->ctlr.send = fcoe_fip_send; | |
343 | fcoe->ctlr.update_mac = fcoe_update_src_mac; | |
11b56188 | 344 | fcoe->ctlr.get_src_addr = fcoe_get_src_mac; |
54b649f8 | 345 | |
59d92516 | 346 | err = fcoe_interface_setup(fcoe, netdev); |
347 | if (err) { | |
348 | fcoe_ctlr_destroy(&fcoe->ctlr); | |
349 | kfree(fcoe); | |
350 | dev_put(netdev); | |
351 | return NULL; | |
352 | } | |
030f4e00 CL |
353 | |
354 | return fcoe; | |
355 | } | |
356 | ||
54b649f8 | 357 | /** |
1875f27e RL |
358 | * fcoe_interface_cleanup() - Clean up a FCoE interface |
359 | * @fcoe: The FCoE interface to be cleaned up | |
2e70e241 CL |
360 | * |
361 | * Caller must be holding the RTNL mutex | |
54b649f8 CL |
362 | */ |
363 | void fcoe_interface_cleanup(struct fcoe_interface *fcoe) | |
364 | { | |
365 | struct net_device *netdev = fcoe->netdev; | |
366 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
367 | u8 flogi_maddr[ETH_ALEN]; | |
b7a727f1 | 368 | const struct net_device_ops *ops; |
54b649f8 CL |
369 | |
370 | /* | |
371 | * Don't listen for Ethernet packets anymore. | |
372 | * synchronize_net() ensures that the packet handlers are not running | |
373 | * on another CPU. dev_remove_pack() would do that, this calls the | |
374 | * unsyncronized version __dev_remove_pack() to avoid multiple delays. | |
375 | */ | |
376 | __dev_remove_pack(&fcoe->fcoe_packet_type); | |
377 | __dev_remove_pack(&fcoe->fip_packet_type); | |
378 | synchronize_net(); | |
379 | ||
54b649f8 | 380 | /* Delete secondary MAC addresses */ |
54b649f8 CL |
381 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
382 | dev_unicast_delete(netdev, flogi_maddr); | |
54b649f8 CL |
383 | if (fip->spma) |
384 | dev_unicast_delete(netdev, fip->ctl_src_addr); | |
385 | dev_mc_delete(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0); | |
b7a727f1 YZ |
386 | |
387 | /* Tell the LLD we are done w/ FCoE */ | |
388 | ops = netdev->netdev_ops; | |
389 | if (ops->ndo_fcoe_disable) { | |
390 | if (ops->ndo_fcoe_disable(netdev)) | |
391 | FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" | |
392 | " specific feature for LLD.\n"); | |
393 | } | |
54b649f8 CL |
394 | } |
395 | ||
030f4e00 CL |
396 | /** |
397 | * fcoe_interface_release() - fcoe_port kref release function | |
1875f27e | 398 | * @kref: Embedded reference count in an fcoe_interface struct |
030f4e00 CL |
399 | */ |
400 | static void fcoe_interface_release(struct kref *kref) | |
401 | { | |
402 | struct fcoe_interface *fcoe; | |
2e70e241 | 403 | struct net_device *netdev; |
030f4e00 CL |
404 | |
405 | fcoe = container_of(kref, struct fcoe_interface, kref); | |
2e70e241 CL |
406 | netdev = fcoe->netdev; |
407 | /* tear-down the FCoE controller */ | |
408 | fcoe_ctlr_destroy(&fcoe->ctlr); | |
030f4e00 | 409 | kfree(fcoe); |
2e70e241 | 410 | dev_put(netdev); |
030f4e00 CL |
411 | } |
412 | ||
413 | /** | |
1875f27e RL |
414 | * fcoe_interface_get() - Get a reference to a FCoE interface |
415 | * @fcoe: The FCoE interface to be held | |
030f4e00 CL |
416 | */ |
417 | static inline void fcoe_interface_get(struct fcoe_interface *fcoe) | |
418 | { | |
419 | kref_get(&fcoe->kref); | |
420 | } | |
421 | ||
422 | /** | |
1875f27e RL |
423 | * fcoe_interface_put() - Put a reference to a FCoE interface |
424 | * @fcoe: The FCoE interface to be released | |
030f4e00 CL |
425 | */ |
426 | static inline void fcoe_interface_put(struct fcoe_interface *fcoe) | |
427 | { | |
428 | kref_put(&fcoe->kref, fcoe_interface_release); | |
429 | } | |
430 | ||
ab6b85c1 | 431 | /** |
1875f27e RL |
432 | * fcoe_fip_recv() - Handler for received FIP frames |
433 | * @skb: The receive skb | |
434 | * @netdev: The associated net device | |
435 | * @ptype: The packet_type structure which was used to register this handler | |
436 | * @orig_dev: The original net_device the the skb was received on. | |
437 | * (in case dev is a bond) | |
ab6b85c1 VD |
438 | * |
439 | * Returns: 0 for success | |
440 | */ | |
1875f27e | 441 | static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, |
ab6b85c1 VD |
442 | struct packet_type *ptype, |
443 | struct net_device *orig_dev) | |
444 | { | |
259ad85d | 445 | struct fcoe_interface *fcoe; |
ab6b85c1 | 446 | |
259ad85d | 447 | fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); |
3fe9a0ba | 448 | fcoe_ctlr_recv(&fcoe->ctlr, skb); |
ab6b85c1 VD |
449 | return 0; |
450 | } | |
451 | ||
452 | /** | |
1875f27e RL |
453 | * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame |
454 | * @fip: The FCoE controller | |
455 | * @skb: The FIP packet to be sent | |
ab6b85c1 VD |
456 | */ |
457 | static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
458 | { | |
3fe9a0ba | 459 | skb->dev = fcoe_from_ctlr(fip)->netdev; |
ab6b85c1 VD |
460 | dev_queue_xmit(skb); |
461 | } | |
462 | ||
463 | /** | |
1875f27e RL |
464 | * fcoe_update_src_mac() - Update the Ethernet MAC filters |
465 | * @lport: The local port to update the source MAC on | |
466 | * @addr: Unicast MAC address to add | |
ab6b85c1 VD |
467 | * |
468 | * Remove any previously-set unicast MAC filter. | |
469 | * Add secondary FCoE MAC address filter for our OUI. | |
470 | */ | |
11b56188 | 471 | static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) |
ab6b85c1 | 472 | { |
11b56188 CL |
473 | struct fcoe_port *port = lport_priv(lport); |
474 | struct fcoe_interface *fcoe = port->fcoe; | |
25024989 | 475 | |
ab6b85c1 | 476 | rtnl_lock(); |
11b56188 CL |
477 | if (!is_zero_ether_addr(port->data_src_addr)) |
478 | dev_unicast_delete(fcoe->netdev, port->data_src_addr); | |
479 | if (!is_zero_ether_addr(addr)) | |
480 | dev_unicast_add(fcoe->netdev, addr); | |
481 | memcpy(port->data_src_addr, addr, ETH_ALEN); | |
ab6b85c1 VD |
482 | rtnl_unlock(); |
483 | } | |
484 | ||
11b56188 CL |
485 | /** |
486 | * fcoe_get_src_mac() - return the Ethernet source address for an lport | |
487 | * @lport: libfc lport | |
488 | */ | |
489 | static u8 *fcoe_get_src_mac(struct fc_lport *lport) | |
490 | { | |
491 | struct fcoe_port *port = lport_priv(lport); | |
492 | ||
493 | return port->data_src_addr; | |
494 | } | |
495 | ||
7f349142 | 496 | /** |
1875f27e RL |
497 | * fcoe_lport_config() - Set up a local port |
498 | * @lport: The local port to be setup | |
7f349142 VD |
499 | * |
500 | * Returns: 0 for success | |
501 | */ | |
1875f27e | 502 | static int fcoe_lport_config(struct fc_lport *lport) |
7f349142 | 503 | { |
1875f27e RL |
504 | lport->link_up = 0; |
505 | lport->qfull = 0; | |
506 | lport->max_retry_count = 3; | |
507 | lport->max_rport_retry_count = 3; | |
508 | lport->e_d_tov = 2 * 1000; /* FC-FS default */ | |
509 | lport->r_a_tov = 2 * 2 * 1000; | |
510 | lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | | |
511 | FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); | |
512 | lport->does_npiv = 1; | |
513 | ||
514 | fc_lport_init_stats(lport); | |
7f349142 VD |
515 | |
516 | /* lport fc_lport related configuration */ | |
1875f27e | 517 | fc_lport_config(lport); |
7f349142 VD |
518 | |
519 | /* offload related configuration */ | |
1875f27e RL |
520 | lport->crc_offload = 0; |
521 | lport->seq_offload = 0; | |
522 | lport->lro_enabled = 0; | |
523 | lport->lro_xid = 0; | |
524 | lport->lso_max = 0; | |
7f349142 VD |
525 | |
526 | return 0; | |
527 | } | |
528 | ||
1047f221 | 529 | /** |
1875f27e RL |
530 | * fcoe_queue_timer() - The fcoe queue timer |
531 | * @lport: The local port | |
1047f221 VD |
532 | * |
533 | * Calls fcoe_check_wait_queue on timeout | |
1047f221 | 534 | */ |
1875f27e | 535 | static void fcoe_queue_timer(ulong lport) |
1047f221 | 536 | { |
1875f27e | 537 | fcoe_check_wait_queue((struct fc_lport *)lport, NULL); |
1047f221 VD |
538 | } |
539 | ||
7f349142 | 540 | /** |
1875f27e RL |
541 | * fcoe_netdev_config() - Set up net devive for SW FCoE |
542 | * @lport: The local port that is associated with the net device | |
543 | * @netdev: The associated net device | |
7f349142 | 544 | * |
1875f27e | 545 | * Must be called after fcoe_lport_config() as it will use local port mutex |
7f349142 | 546 | * |
1875f27e | 547 | * Returns: 0 for success |
7f349142 | 548 | */ |
1875f27e | 549 | static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) |
7f349142 VD |
550 | { |
551 | u32 mfs; | |
552 | u64 wwnn, wwpn; | |
25024989 | 553 | struct fcoe_interface *fcoe; |
014f5c3f | 554 | struct fcoe_port *port; |
7f349142 VD |
555 | |
556 | /* Setup lport private data to point to fcoe softc */ | |
1875f27e | 557 | port = lport_priv(lport); |
25024989 | 558 | fcoe = port->fcoe; |
7f349142 VD |
559 | |
560 | /* | |
561 | * Determine max frame size based on underlying device and optional | |
562 | * user-configured limit. If the MFS is too low, fcoe_link_ok() | |
563 | * will return 0, so do this first. | |
564 | */ | |
7221d7e5 YZ |
565 | mfs = netdev->mtu; |
566 | if (netdev->features & NETIF_F_FCOE_MTU) { | |
567 | mfs = FCOE_MTU; | |
568 | FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); | |
569 | } | |
570 | mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); | |
1875f27e | 571 | if (fc_set_mfs(lport, mfs)) |
7f349142 VD |
572 | return -EINVAL; |
573 | ||
7f349142 | 574 | /* offload features support */ |
1d1b88dc | 575 | if (netdev->features & NETIF_F_SG) |
1875f27e | 576 | lport->sg_supp = 1; |
7f349142 | 577 | |
7f349142 | 578 | if (netdev->features & NETIF_F_FCOE_CRC) { |
1875f27e | 579 | lport->crc_offload = 1; |
d5488eb9 | 580 | FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); |
7f349142 | 581 | } |
7f349142 | 582 | if (netdev->features & NETIF_F_FSO) { |
1875f27e RL |
583 | lport->seq_offload = 1; |
584 | lport->lso_max = netdev->gso_max_size; | |
d5488eb9 | 585 | FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", |
1875f27e | 586 | lport->lso_max); |
7f349142 | 587 | } |
7f349142 | 588 | if (netdev->fcoe_ddp_xid) { |
1875f27e RL |
589 | lport->lro_enabled = 1; |
590 | lport->lro_xid = netdev->fcoe_ddp_xid; | |
d5488eb9 | 591 | FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", |
1875f27e | 592 | lport->lro_xid); |
7f349142 | 593 | } |
014f5c3f CL |
594 | skb_queue_head_init(&port->fcoe_pending_queue); |
595 | port->fcoe_pending_queue_active = 0; | |
1875f27e | 596 | setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport); |
7f349142 | 597 | |
1875f27e | 598 | if (!lport->vport) { |
9a05753b | 599 | wwnn = fcoe_wwn_from_mac(netdev->dev_addr, 1, 0); |
1875f27e | 600 | fc_set_wwnn(lport, wwnn); |
9a05753b CL |
601 | /* XXX - 3rd arg needs to be vlan id */ |
602 | wwpn = fcoe_wwn_from_mac(netdev->dev_addr, 2, 0); | |
1875f27e | 603 | fc_set_wwpn(lport, wwpn); |
9a05753b | 604 | } |
7f349142 | 605 | |
7f349142 VD |
606 | return 0; |
607 | } | |
608 | ||
609 | /** | |
1875f27e RL |
610 | * fcoe_shost_config() - Set up the SCSI host associated with a local port |
611 | * @lport: The local port | |
612 | * @shost: The SCSI host to associate with the local port | |
613 | * @dev: The device associated with the SCSI host | |
7f349142 VD |
614 | * |
615 | * Must be called after fcoe_lport_config() and fcoe_netdev_config() | |
616 | * | |
1875f27e | 617 | * Returns: 0 for success |
7f349142 | 618 | */ |
1875f27e RL |
619 | static int fcoe_shost_config(struct fc_lport *lport, struct Scsi_Host *shost, |
620 | struct device *dev) | |
7f349142 VD |
621 | { |
622 | int rc = 0; | |
623 | ||
624 | /* lport scsi host config */ | |
1875f27e RL |
625 | lport->host->max_lun = FCOE_MAX_LUN; |
626 | lport->host->max_id = FCOE_MAX_FCP_TARGET; | |
627 | lport->host->max_channel = 0; | |
628 | if (lport->vport) | |
629 | lport->host->transportt = fcoe_vport_transport_template; | |
e9084bb8 | 630 | else |
1875f27e | 631 | lport->host->transportt = fcoe_transport_template; |
7f349142 VD |
632 | |
633 | /* add the new host to the SCSI-ml */ | |
1875f27e | 634 | rc = scsi_add_host(lport->host, dev); |
7f349142 | 635 | if (rc) { |
1875f27e | 636 | FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " |
d5488eb9 | 637 | "error on scsi_add_host\n"); |
7f349142 VD |
638 | return rc; |
639 | } | |
9a05753b | 640 | |
1875f27e RL |
641 | if (!lport->vport) |
642 | fc_host_max_npiv_vports(lport->host) = USHORT_MAX; | |
9a05753b | 643 | |
1875f27e | 644 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, |
5baa17c3 | 645 | "%s v%s over %s", FCOE_NAME, FCOE_VERSION, |
1875f27e | 646 | fcoe_netdev(lport)->name); |
7f349142 VD |
647 | |
648 | return 0; | |
649 | } | |
650 | ||
1875f27e RL |
651 | /** |
652 | * fcoe_oem_match() - The match routine for the offloaded exchange manager | |
653 | * @fp: The I/O frame | |
d7179680 | 654 | * |
1875f27e RL |
655 | * This routine will be associated with an exchange manager (EM). When |
656 | * the libfc exchange handling code is looking for an EM to use it will | |
657 | * call this routine and pass it the frame that it wishes to send. This | |
658 | * routine will return True if the associated EM is to be used and False | |
659 | * if the echange code should continue looking for an EM. | |
660 | * | |
661 | * The offload EM that this routine is associated with will handle any | |
662 | * packets that are for SCSI read requests. | |
663 | * | |
664 | * Returns: True for read types I/O, otherwise returns false. | |
d7179680 VD |
665 | */ |
666 | bool fcoe_oem_match(struct fc_frame *fp) | |
667 | { | |
05cc7390 YZ |
668 | return fc_fcp_is_read(fr_fsp(fp)) && |
669 | (fr_fsp(fp)->data_len > fcoe_ddp_min); | |
d7179680 VD |
670 | } |
671 | ||
7f349142 | 672 | /** |
1875f27e RL |
673 | * fcoe_em_config() - Allocate and configure an exchange manager |
674 | * @lport: The local port that the new EM will be associated with | |
7f349142 | 675 | * |
1875f27e | 676 | * Returns: 0 on success |
7f349142 | 677 | */ |
1875f27e | 678 | static inline int fcoe_em_config(struct fc_lport *lport) |
7f349142 | 679 | { |
1875f27e | 680 | struct fcoe_port *port = lport_priv(lport); |
25024989 CL |
681 | struct fcoe_interface *fcoe = port->fcoe; |
682 | struct fcoe_interface *oldfcoe = NULL; | |
1d1b88dc | 683 | struct net_device *old_real_dev, *cur_real_dev; |
d7179680 VD |
684 | u16 min_xid = FCOE_MIN_XID; |
685 | u16 max_xid = FCOE_MAX_XID; | |
686 | ||
687 | /* | |
688 | * Check if need to allocate an em instance for | |
689 | * offload exchange ids to be shared across all VN_PORTs/lport. | |
690 | */ | |
1875f27e RL |
691 | if (!lport->lro_enabled || !lport->lro_xid || |
692 | (lport->lro_xid >= max_xid)) { | |
693 | lport->lro_xid = 0; | |
d7179680 VD |
694 | goto skip_oem; |
695 | } | |
696 | ||
697 | /* | |
698 | * Reuse existing offload em instance in case | |
1d1b88dc | 699 | * it is already allocated on real eth device |
d7179680 | 700 | */ |
25024989 CL |
701 | if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
702 | cur_real_dev = vlan_dev_real_dev(fcoe->netdev); | |
1d1b88dc | 703 | else |
25024989 | 704 | cur_real_dev = fcoe->netdev; |
1d1b88dc | 705 | |
25024989 | 706 | list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { |
25024989 CL |
707 | if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
708 | old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); | |
1d1b88dc | 709 | else |
25024989 | 710 | old_real_dev = oldfcoe->netdev; |
1d1b88dc VD |
711 | |
712 | if (cur_real_dev == old_real_dev) { | |
991cbb60 | 713 | fcoe->oem = oldfcoe->oem; |
d7179680 VD |
714 | break; |
715 | } | |
716 | } | |
717 | ||
991cbb60 | 718 | if (fcoe->oem) { |
1875f27e | 719 | if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { |
d7179680 VD |
720 | printk(KERN_ERR "fcoe_em_config: failed to add " |
721 | "offload em:%p on interface:%s\n", | |
991cbb60 | 722 | fcoe->oem, fcoe->netdev->name); |
d7179680 VD |
723 | return -ENOMEM; |
724 | } | |
725 | } else { | |
1875f27e RL |
726 | fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, |
727 | FCOE_MIN_XID, lport->lro_xid, | |
728 | fcoe_oem_match); | |
991cbb60 | 729 | if (!fcoe->oem) { |
d7179680 VD |
730 | printk(KERN_ERR "fcoe_em_config: failed to allocate " |
731 | "em for offload exches on interface:%s\n", | |
25024989 | 732 | fcoe->netdev->name); |
d7179680 VD |
733 | return -ENOMEM; |
734 | } | |
735 | } | |
736 | ||
737 | /* | |
738 | * Exclude offload EM xid range from next EM xid range. | |
739 | */ | |
1875f27e | 740 | min_xid += lport->lro_xid + 1; |
d7179680 VD |
741 | |
742 | skip_oem: | |
1875f27e | 743 | if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { |
d7179680 | 744 | printk(KERN_ERR "fcoe_em_config: failed to " |
25024989 | 745 | "allocate em on interface %s\n", fcoe->netdev->name); |
7f349142 | 746 | return -ENOMEM; |
d7179680 | 747 | } |
7f349142 VD |
748 | |
749 | return 0; | |
750 | } | |
751 | ||
752 | /** | |
1875f27e RL |
753 | * fcoe_if_destroy() - Tear down a SW FCoE instance |
754 | * @lport: The local port to be destroyed | |
7f349142 | 755 | */ |
af7f85d9 | 756 | static void fcoe_if_destroy(struct fc_lport *lport) |
7f349142 | 757 | { |
014f5c3f CL |
758 | struct fcoe_port *port = lport_priv(lport); |
759 | struct fcoe_interface *fcoe = port->fcoe; | |
25024989 | 760 | struct net_device *netdev = fcoe->netdev; |
7f349142 | 761 | |
d5488eb9 | 762 | FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); |
7f349142 | 763 | |
7f349142 | 764 | /* Logout of the fabric */ |
af7f85d9 | 765 | fc_fabric_logoff(lport); |
7f349142 | 766 | |
54b649f8 CL |
767 | /* Cleanup the fc_lport */ |
768 | fc_lport_destroy(lport); | |
769 | fc_fcp_destroy(lport); | |
770 | ||
771 | /* Stop the transmit retry timer */ | |
772 | del_timer_sync(&port->timer); | |
ab6b85c1 | 773 | |
54b649f8 CL |
774 | /* Free existing transmit skbs */ |
775 | fcoe_clean_pending_queue(lport); | |
776 | ||
11b56188 CL |
777 | rtnl_lock(); |
778 | if (!is_zero_ether_addr(port->data_src_addr)) | |
779 | dev_unicast_delete(netdev, port->data_src_addr); | |
780 | rtnl_unlock(); | |
781 | ||
54b649f8 CL |
782 | /* receives may not be stopped until after this */ |
783 | fcoe_interface_put(fcoe); | |
7f349142 | 784 | |
f161fb72 | 785 | /* Free queued packets for the per-CPU receive threads */ |
af7f85d9 | 786 | fcoe_percpu_clean(lport); |
f161fb72 | 787 | |
7f349142 | 788 | /* Detach from the scsi-ml */ |
af7f85d9 CL |
789 | fc_remove_host(lport->host); |
790 | scsi_remove_host(lport->host); | |
7f349142 VD |
791 | |
792 | /* There are no more rports or I/O, free the EM */ | |
af7f85d9 | 793 | fc_exch_mgr_free(lport); |
7f349142 | 794 | |
7f349142 | 795 | /* Free memory used by statistical counters */ |
af7f85d9 | 796 | fc_lport_free_stats(lport); |
7f349142 | 797 | |
2e70e241 | 798 | /* Release the Scsi_Host */ |
af7f85d9 | 799 | scsi_host_put(lport->host); |
7f349142 VD |
800 | } |
801 | ||
1875f27e RL |
802 | /** |
803 | * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device | |
804 | * @lport: The local port to setup DDP for | |
805 | * @xid: The exchange ID for this DDP transfer | |
806 | * @sgl: The scatterlist describing this transfer | |
807 | * @sgc: The number of sg items | |
7f349142 | 808 | * |
1875f27e | 809 | * Returns: 0 if the DDP context was not configured |
7f349142 | 810 | */ |
1875f27e RL |
811 | static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, |
812 | struct scatterlist *sgl, unsigned int sgc) | |
7f349142 | 813 | { |
1875f27e | 814 | struct net_device *netdev = fcoe_netdev(lport); |
7f349142 | 815 | |
1875f27e RL |
816 | if (netdev->netdev_ops->ndo_fcoe_ddp_setup) |
817 | return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, | |
818 | xid, sgl, | |
819 | sgc); | |
7f349142 VD |
820 | |
821 | return 0; | |
822 | } | |
823 | ||
1875f27e RL |
824 | /** |
825 | * fcoe_ddp_done() - Call a LLD's ddp_done through the net device | |
826 | * @lport: The local port to complete DDP on | |
827 | * @xid: The exchange ID for this DDP transfer | |
7f349142 | 828 | * |
1875f27e | 829 | * Returns: the length of data that have been completed by DDP |
7f349142 | 830 | */ |
1875f27e | 831 | static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) |
7f349142 | 832 | { |
1875f27e | 833 | struct net_device *netdev = fcoe_netdev(lport); |
7f349142 | 834 | |
1875f27e RL |
835 | if (netdev->netdev_ops->ndo_fcoe_ddp_done) |
836 | return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); | |
7f349142 VD |
837 | return 0; |
838 | } | |
839 | ||
7f349142 | 840 | /** |
1875f27e RL |
841 | * fcoe_if_create() - Create a FCoE instance on an interface |
842 | * @fcoe: The FCoE interface to create a local port on | |
843 | * @parent: The device pointer to be the parent in sysfs for the SCSI host | |
844 | * @npiv: Indicates if the port is a vport or not | |
7f349142 | 845 | * |
1875f27e | 846 | * Creates a fc_lport instance and a Scsi_Host instance and configure them. |
7f349142 | 847 | * |
1875f27e | 848 | * Returns: The allocated fc_lport or an error pointer |
7f349142 | 849 | */ |
030f4e00 | 850 | static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, |
9a05753b | 851 | struct device *parent, int npiv) |
7f349142 | 852 | { |
1875f27e | 853 | struct net_device *netdev = fcoe->netdev; |
af7f85d9 | 854 | struct fc_lport *lport = NULL; |
014f5c3f | 855 | struct fcoe_port *port; |
7f349142 | 856 | struct Scsi_Host *shost; |
1875f27e | 857 | int rc; |
9a05753b CL |
858 | /* |
859 | * parent is only a vport if npiv is 1, | |
860 | * but we'll only use vport in that case so go ahead and set it | |
861 | */ | |
862 | struct fc_vport *vport = dev_to_vport(parent); | |
7f349142 | 863 | |
d5488eb9 | 864 | FCOE_NETDEV_DBG(netdev, "Create Interface\n"); |
7f349142 | 865 | |
9a05753b CL |
866 | if (!npiv) { |
867 | lport = libfc_host_alloc(&fcoe_shost_template, | |
868 | sizeof(struct fcoe_port)); | |
869 | } else { | |
870 | lport = libfc_vport_create(vport, | |
871 | sizeof(struct fcoe_port)); | |
872 | } | |
86221969 | 873 | if (!lport) { |
d5488eb9 | 874 | FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); |
af7f85d9 | 875 | rc = -ENOMEM; |
030f4e00 | 876 | goto out; |
7f349142 | 877 | } |
86221969 | 878 | shost = lport->host; |
014f5c3f | 879 | port = lport_priv(lport); |
2e70e241 | 880 | port->lport = lport; |
014f5c3f | 881 | port->fcoe = fcoe; |
2e70e241 | 882 | INIT_WORK(&port->destroy_work, fcoe_destroy_work); |
7f349142 | 883 | |
1875f27e | 884 | /* configure a fc_lport including the exchange manager */ |
af7f85d9 | 885 | rc = fcoe_lport_config(lport); |
7f349142 | 886 | if (rc) { |
d5488eb9 RL |
887 | FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " |
888 | "interface\n"); | |
7f349142 VD |
889 | goto out_host_put; |
890 | } | |
891 | ||
9a05753b CL |
892 | if (npiv) { |
893 | FCOE_NETDEV_DBG(netdev, "Setting vport names, 0x%llX 0x%llX\n", | |
1875f27e | 894 | vport->node_name, vport->port_name); |
9a05753b CL |
895 | fc_set_wwnn(lport, vport->node_name); |
896 | fc_set_wwpn(lport, vport->port_name); | |
897 | } | |
898 | ||
ab6b85c1 | 899 | /* configure lport network properties */ |
af7f85d9 | 900 | rc = fcoe_netdev_config(lport, netdev); |
ab6b85c1 | 901 | if (rc) { |
d5488eb9 RL |
902 | FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " |
903 | "interface\n"); | |
54b649f8 | 904 | goto out_lp_destroy; |
ab6b85c1 | 905 | } |
97c8389d | 906 | |
7f349142 | 907 | /* configure lport scsi host properties */ |
af7f85d9 | 908 | rc = fcoe_shost_config(lport, shost, parent); |
7f349142 | 909 | if (rc) { |
d5488eb9 RL |
910 | FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " |
911 | "interface\n"); | |
54b649f8 | 912 | goto out_lp_destroy; |
7f349142 VD |
913 | } |
914 | ||
96316099 | 915 | /* Initialize the library */ |
af7f85d9 | 916 | rc = fcoe_libfc_config(lport, &fcoe_libfc_fcn_templ); |
7f349142 | 917 | if (rc) { |
96316099 | 918 | FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " |
d5488eb9 | 919 | "interface\n"); |
96316099 | 920 | goto out_lp_destroy; |
7f349142 VD |
921 | } |
922 | ||
9a05753b CL |
923 | if (!npiv) { |
924 | /* | |
925 | * fcoe_em_alloc() and fcoe_hostlist_add() both | |
926 | * need to be atomic with respect to other changes to the | |
927 | * hostlist since fcoe_em_alloc() looks for an existing EM | |
928 | * instance on host list updated by fcoe_hostlist_add(). | |
929 | * | |
930 | * This is currently handled through the fcoe_config_mutex | |
931 | * begin held. | |
932 | */ | |
c863df33 | 933 | |
9a05753b CL |
934 | /* lport exch manager allocation */ |
935 | rc = fcoe_em_config(lport); | |
936 | if (rc) { | |
937 | FCOE_NETDEV_DBG(netdev, "Could not configure the EM " | |
1875f27e | 938 | "for the interface\n"); |
9a05753b CL |
939 | goto out_lp_destroy; |
940 | } | |
7f349142 VD |
941 | } |
942 | ||
030f4e00 | 943 | fcoe_interface_get(fcoe); |
af7f85d9 | 944 | return lport; |
7f349142 VD |
945 | |
946 | out_lp_destroy: | |
af7f85d9 | 947 | fc_exch_mgr_free(lport); |
7f349142 | 948 | out_host_put: |
af7f85d9 CL |
949 | scsi_host_put(lport->host); |
950 | out: | |
951 | return ERR_PTR(rc); | |
7f349142 VD |
952 | } |
953 | ||
954 | /** | |
1875f27e | 955 | * fcoe_if_init() - Initialization routine for fcoe.ko |
7f349142 | 956 | * |
1875f27e RL |
957 | * Attaches the SW FCoE transport to the FC transport |
958 | * | |
959 | * Returns: 0 on success | |
7f349142 VD |
960 | */ |
961 | static int __init fcoe_if_init(void) | |
962 | { | |
963 | /* attach to scsi transport */ | |
e9084bb8 CL |
964 | fcoe_transport_template = fc_attach_transport(&fcoe_transport_function); |
965 | fcoe_vport_transport_template = | |
966 | fc_attach_transport(&fcoe_vport_transport_function); | |
7f349142 | 967 | |
e9084bb8 | 968 | if (!fcoe_transport_template) { |
d5488eb9 | 969 | printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); |
7f349142 VD |
970 | return -ENODEV; |
971 | } | |
972 | ||
973 | return 0; | |
974 | } | |
975 | ||
976 | /** | |
1875f27e RL |
977 | * fcoe_if_exit() - Tear down fcoe.ko |
978 | * | |
979 | * Detaches the SW FCoE transport from the FC transport | |
7f349142 | 980 | * |
1875f27e | 981 | * Returns: 0 on success |
7f349142 VD |
982 | */ |
983 | int __exit fcoe_if_exit(void) | |
984 | { | |
e9084bb8 CL |
985 | fc_release_transport(fcoe_transport_template); |
986 | fc_release_transport(fcoe_vport_transport_template); | |
987 | fcoe_transport_template = NULL; | |
988 | fcoe_vport_transport_template = NULL; | |
7f349142 VD |
989 | return 0; |
990 | } | |
991 | ||
8976f424 | 992 | /** |
1875f27e RL |
993 | * fcoe_percpu_thread_create() - Create a receive thread for an online CPU |
994 | * @cpu: The CPU index of the CPU to create a receive thread for | |
8976f424 RL |
995 | */ |
996 | static void fcoe_percpu_thread_create(unsigned int cpu) | |
997 | { | |
998 | struct fcoe_percpu_s *p; | |
999 | struct task_struct *thread; | |
1000 | ||
1001 | p = &per_cpu(fcoe_percpu, cpu); | |
1002 | ||
1003 | thread = kthread_create(fcoe_percpu_receive_thread, | |
1004 | (void *)p, "fcoethread/%d", cpu); | |
1005 | ||
e7a51997 | 1006 | if (likely(!IS_ERR(thread))) { |
8976f424 RL |
1007 | kthread_bind(thread, cpu); |
1008 | wake_up_process(thread); | |
1009 | ||
1010 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1011 | p->thread = thread; | |
1012 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1013 | } | |
1014 | } | |
1015 | ||
1016 | /** | |
1875f27e RL |
1017 | * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU |
1018 | * @cpu: The CPU index of the CPU whose receive thread is to be destroyed | |
8976f424 RL |
1019 | * |
1020 | * Destroys a per-CPU Rx thread. Any pending skbs are moved to the | |
1021 | * current CPU's Rx thread. If the thread being destroyed is bound to | |
1022 | * the CPU processing this context the skbs will be freed. | |
1023 | */ | |
1024 | static void fcoe_percpu_thread_destroy(unsigned int cpu) | |
1025 | { | |
1026 | struct fcoe_percpu_s *p; | |
1027 | struct task_struct *thread; | |
1028 | struct page *crc_eof; | |
1029 | struct sk_buff *skb; | |
1030 | #ifdef CONFIG_SMP | |
1031 | struct fcoe_percpu_s *p0; | |
1032 | unsigned targ_cpu = smp_processor_id(); | |
1033 | #endif /* CONFIG_SMP */ | |
1034 | ||
d5488eb9 | 1035 | FCOE_DBG("Destroying receive thread for CPU %d\n", cpu); |
8976f424 RL |
1036 | |
1037 | /* Prevent any new skbs from being queued for this CPU. */ | |
1038 | p = &per_cpu(fcoe_percpu, cpu); | |
1039 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1040 | thread = p->thread; | |
1041 | p->thread = NULL; | |
1042 | crc_eof = p->crc_eof_page; | |
1043 | p->crc_eof_page = NULL; | |
1044 | p->crc_eof_offset = 0; | |
1045 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1046 | ||
1047 | #ifdef CONFIG_SMP | |
1048 | /* | |
1049 | * Don't bother moving the skb's if this context is running | |
1050 | * on the same CPU that is having its thread destroyed. This | |
1051 | * can easily happen when the module is removed. | |
1052 | */ | |
1053 | if (cpu != targ_cpu) { | |
1054 | p0 = &per_cpu(fcoe_percpu, targ_cpu); | |
1055 | spin_lock_bh(&p0->fcoe_rx_list.lock); | |
1056 | if (p0->thread) { | |
d5488eb9 RL |
1057 | FCOE_DBG("Moving frames from CPU %d to CPU %d\n", |
1058 | cpu, targ_cpu); | |
8976f424 RL |
1059 | |
1060 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1061 | __skb_queue_tail(&p0->fcoe_rx_list, skb); | |
1062 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
1063 | } else { | |
1064 | /* | |
1065 | * The targeted CPU is not initialized and cannot accept | |
1875f27e | 1066 | * new skbs. Unlock the targeted CPU and drop the skbs |
8976f424 RL |
1067 | * on the CPU that is going offline. |
1068 | */ | |
1069 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1070 | kfree_skb(skb); | |
1071 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
1072 | } | |
1073 | } else { | |
1074 | /* | |
1075 | * This scenario occurs when the module is being removed | |
1076 | * and all threads are being destroyed. skbs will continue | |
1077 | * to be shifted from the CPU thread that is being removed | |
1078 | * to the CPU thread associated with the CPU that is processing | |
1079 | * the module removal. Once there is only one CPU Rx thread it | |
1080 | * will reach this case and we will drop all skbs and later | |
1081 | * stop the thread. | |
1082 | */ | |
1083 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1084 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1085 | kfree_skb(skb); | |
1086 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1087 | } | |
1088 | #else | |
1089 | /* | |
dd3fd72e | 1090 | * This a non-SMP scenario where the singular Rx thread is |
8976f424 RL |
1091 | * being removed. Free all skbs and stop the thread. |
1092 | */ | |
1093 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1094 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1095 | kfree_skb(skb); | |
1096 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1097 | #endif | |
1098 | ||
1099 | if (thread) | |
1100 | kthread_stop(thread); | |
1101 | ||
1102 | if (crc_eof) | |
1103 | put_page(crc_eof); | |
1104 | } | |
1105 | ||
1106 | /** | |
1875f27e RL |
1107 | * fcoe_cpu_callback() - Handler for CPU hotplug events |
1108 | * @nfb: The callback data block | |
1109 | * @action: The event triggering the callback | |
1110 | * @hcpu: The index of the CPU that the event is for | |
8976f424 | 1111 | * |
1875f27e | 1112 | * This creates or destroys per-CPU data for fcoe |
8976f424 RL |
1113 | * |
1114 | * Returns NOTIFY_OK always. | |
1115 | */ | |
1116 | static int fcoe_cpu_callback(struct notifier_block *nfb, | |
1117 | unsigned long action, void *hcpu) | |
1118 | { | |
1119 | unsigned cpu = (unsigned long)hcpu; | |
1120 | ||
1121 | switch (action) { | |
1122 | case CPU_ONLINE: | |
1123 | case CPU_ONLINE_FROZEN: | |
d5488eb9 | 1124 | FCOE_DBG("CPU %x online: Create Rx thread\n", cpu); |
8976f424 RL |
1125 | fcoe_percpu_thread_create(cpu); |
1126 | break; | |
1127 | case CPU_DEAD: | |
1128 | case CPU_DEAD_FROZEN: | |
d5488eb9 | 1129 | FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu); |
8976f424 RL |
1130 | fcoe_percpu_thread_destroy(cpu); |
1131 | break; | |
1132 | default: | |
1133 | break; | |
1134 | } | |
1135 | return NOTIFY_OK; | |
1136 | } | |
1137 | ||
85b4aa49 | 1138 | /** |
1875f27e RL |
1139 | * fcoe_rcv() - Receive packets from a net device |
1140 | * @skb: The received packet | |
1141 | * @netdev: The net device that the packet was received on | |
1142 | * @ptype: The packet type context | |
1143 | * @olddev: The last device net device | |
85b4aa49 | 1144 | * |
1875f27e RL |
1145 | * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a |
1146 | * FC frame and passes the frame to libfc. | |
85b4aa49 RL |
1147 | * |
1148 | * Returns: 0 for success | |
34f42a07 | 1149 | */ |
1875f27e | 1150 | int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, |
85b4aa49 RL |
1151 | struct packet_type *ptype, struct net_device *olddev) |
1152 | { | |
1875f27e | 1153 | struct fc_lport *lport; |
85b4aa49 | 1154 | struct fcoe_rcv_info *fr; |
259ad85d | 1155 | struct fcoe_interface *fcoe; |
85b4aa49 | 1156 | struct fc_frame_header *fh; |
85b4aa49 | 1157 | struct fcoe_percpu_s *fps; |
b2f0091f | 1158 | unsigned int cpu; |
85b4aa49 | 1159 | |
259ad85d | 1160 | fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); |
1875f27e RL |
1161 | lport = fcoe->ctlr.lp; |
1162 | if (unlikely(!lport)) { | |
1163 | FCOE_NETDEV_DBG(netdev, "Cannot find hba structure"); | |
85b4aa49 RL |
1164 | goto err2; |
1165 | } | |
1875f27e | 1166 | if (!lport->link_up) |
97c8389d | 1167 | goto err2; |
85b4aa49 | 1168 | |
1875f27e | 1169 | FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p " |
d5488eb9 RL |
1170 | "data:%p tail:%p end:%p sum:%d dev:%s", |
1171 | skb->len, skb->data_len, skb->head, skb->data, | |
1172 | skb_tail_pointer(skb), skb_end_pointer(skb), | |
1173 | skb->csum, skb->dev ? skb->dev->name : "<NULL>"); | |
85b4aa49 RL |
1174 | |
1175 | /* check for FCOE packet type */ | |
1176 | if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) { | |
1875f27e | 1177 | FCOE_NETDEV_DBG(netdev, "Wrong FC type frame"); |
85b4aa49 RL |
1178 | goto err; |
1179 | } | |
1180 | ||
1181 | /* | |
1182 | * Check for minimum frame length, and make sure required FCoE | |
1183 | * and FC headers are pulled into the linear data area. | |
1184 | */ | |
1185 | if (unlikely((skb->len < FCOE_MIN_FRAME) || | |
1875f27e | 1186 | !pskb_may_pull(skb, FCOE_HEADER_LEN))) |
85b4aa49 RL |
1187 | goto err; |
1188 | ||
1189 | skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); | |
1190 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1191 | ||
85b4aa49 | 1192 | fr = fcoe_dev_from_skb(skb); |
1875f27e | 1193 | fr->fr_dev = lport; |
85b4aa49 | 1194 | fr->ptype = ptype; |
5e5e92df | 1195 | |
85b4aa49 | 1196 | /* |
b2f0091f VD |
1197 | * In case the incoming frame's exchange is originated from |
1198 | * the initiator, then received frame's exchange id is ANDed | |
1199 | * with fc_cpu_mask bits to get the same cpu on which exchange | |
1200 | * was originated, otherwise just use the current cpu. | |
85b4aa49 | 1201 | */ |
b2f0091f VD |
1202 | if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) |
1203 | cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; | |
1204 | else | |
1205 | cpu = smp_processor_id(); | |
5e5e92df | 1206 | |
8976f424 | 1207 | fps = &per_cpu(fcoe_percpu, cpu); |
85b4aa49 | 1208 | spin_lock_bh(&fps->fcoe_rx_list.lock); |
8976f424 RL |
1209 | if (unlikely(!fps->thread)) { |
1210 | /* | |
1211 | * The targeted CPU is not ready, let's target | |
1212 | * the first CPU now. For non-SMP systems this | |
1213 | * will check the same CPU twice. | |
1214 | */ | |
1875f27e | 1215 | FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread " |
d5488eb9 RL |
1216 | "ready for incoming skb- using first online " |
1217 | "CPU.\n"); | |
8976f424 RL |
1218 | |
1219 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1220 | cpu = first_cpu(cpu_online_map); | |
1221 | fps = &per_cpu(fcoe_percpu, cpu); | |
1222 | spin_lock_bh(&fps->fcoe_rx_list.lock); | |
1223 | if (!fps->thread) { | |
1224 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1225 | goto err; | |
1226 | } | |
1227 | } | |
1228 | ||
1229 | /* | |
1230 | * We now have a valid CPU that we're targeting for | |
1231 | * this skb. We also have this receive thread locked, | |
1232 | * so we're free to queue skbs into it's queue. | |
1233 | */ | |
85b4aa49 RL |
1234 | __skb_queue_tail(&fps->fcoe_rx_list, skb); |
1235 | if (fps->fcoe_rx_list.qlen == 1) | |
1236 | wake_up_process(fps->thread); | |
1237 | ||
1238 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1239 | ||
1240 | return 0; | |
1241 | err: | |
1875f27e | 1242 | fc_lport_get_stats(lport)->ErrorFrames++; |
85b4aa49 RL |
1243 | |
1244 | err2: | |
1245 | kfree_skb(skb); | |
1246 | return -1; | |
1247 | } | |
85b4aa49 RL |
1248 | |
1249 | /** | |
1875f27e RL |
1250 | * fcoe_start_io() - Start FCoE I/O |
1251 | * @skb: The packet to be transmitted | |
1252 | * | |
1253 | * This routine is called from the net device to start transmitting | |
1254 | * FCoE packets. | |
85b4aa49 RL |
1255 | * |
1256 | * Returns: 0 for success | |
34f42a07 | 1257 | */ |
85b4aa49 RL |
1258 | static inline int fcoe_start_io(struct sk_buff *skb) |
1259 | { | |
1260 | int rc; | |
1261 | ||
1262 | skb_get(skb); | |
1263 | rc = dev_queue_xmit(skb); | |
1264 | if (rc != 0) | |
1265 | return rc; | |
1266 | kfree_skb(skb); | |
1267 | return 0; | |
1268 | } | |
1269 | ||
1270 | /** | |
1875f27e RL |
1271 | * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC |
1272 | * @skb: The packet to be transmitted | |
1273 | * @tlen: The total length of the trailer | |
1274 | * | |
1275 | * This routine allocates a page for frame trailers. The page is re-used if | |
1276 | * there is enough room left on it for the current trailer. If there isn't | |
1277 | * enough buffer left a new page is allocated for the trailer. Reference to | |
1278 | * the page from this function as well as the skbs using the page fragments | |
1279 | * ensure that the page is freed at the appropriate time. | |
85b4aa49 RL |
1280 | * |
1281 | * Returns: 0 for success | |
34f42a07 | 1282 | */ |
85b4aa49 RL |
1283 | static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen) |
1284 | { | |
1285 | struct fcoe_percpu_s *fps; | |
1286 | struct page *page; | |
85b4aa49 | 1287 | |
5e5e92df | 1288 | fps = &get_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1289 | page = fps->crc_eof_page; |
1290 | if (!page) { | |
1291 | page = alloc_page(GFP_ATOMIC); | |
1292 | if (!page) { | |
5e5e92df | 1293 | put_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1294 | return -ENOMEM; |
1295 | } | |
1296 | fps->crc_eof_page = page; | |
8976f424 | 1297 | fps->crc_eof_offset = 0; |
85b4aa49 RL |
1298 | } |
1299 | ||
1300 | get_page(page); | |
1301 | skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page, | |
1302 | fps->crc_eof_offset, tlen); | |
1303 | skb->len += tlen; | |
1304 | skb->data_len += tlen; | |
1305 | skb->truesize += tlen; | |
1306 | fps->crc_eof_offset += sizeof(struct fcoe_crc_eof); | |
1307 | ||
1308 | if (fps->crc_eof_offset >= PAGE_SIZE) { | |
1309 | fps->crc_eof_page = NULL; | |
1310 | fps->crc_eof_offset = 0; | |
1311 | put_page(page); | |
1312 | } | |
5e5e92df | 1313 | put_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1314 | return 0; |
1315 | } | |
1316 | ||
1317 | /** | |
1875f27e RL |
1318 | * fcoe_fc_crc() - Calculates the CRC for a given frame |
1319 | * @fp: The frame to be checksumed | |
85b4aa49 | 1320 | * |
1875f27e RL |
1321 | * This uses crc32() routine to calculate the CRC for a frame |
1322 | * | |
1323 | * Return: The 32 bit CRC value | |
34f42a07 | 1324 | */ |
85b4aa49 RL |
1325 | u32 fcoe_fc_crc(struct fc_frame *fp) |
1326 | { | |
1327 | struct sk_buff *skb = fp_skb(fp); | |
1328 | struct skb_frag_struct *frag; | |
1329 | unsigned char *data; | |
1330 | unsigned long off, len, clen; | |
1331 | u32 crc; | |
1332 | unsigned i; | |
1333 | ||
1334 | crc = crc32(~0, skb->data, skb_headlen(skb)); | |
1335 | ||
1336 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1337 | frag = &skb_shinfo(skb)->frags[i]; | |
1338 | off = frag->page_offset; | |
1339 | len = frag->size; | |
1340 | while (len > 0) { | |
1341 | clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK)); | |
1342 | data = kmap_atomic(frag->page + (off >> PAGE_SHIFT), | |
1343 | KM_SKB_DATA_SOFTIRQ); | |
1344 | crc = crc32(crc, data + (off & ~PAGE_MASK), clen); | |
1345 | kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ); | |
1346 | off += clen; | |
1347 | len -= clen; | |
1348 | } | |
1349 | } | |
1350 | return crc; | |
1351 | } | |
85b4aa49 RL |
1352 | |
1353 | /** | |
1875f27e RL |
1354 | * fcoe_xmit() - Transmit a FCoE frame |
1355 | * @lport: The local port that the frame is to be transmitted for | |
1356 | * @fp: The frame to be transmitted | |
85b4aa49 | 1357 | * |
1875f27e | 1358 | * Return: 0 for success |
34f42a07 | 1359 | */ |
1875f27e | 1360 | int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) |
85b4aa49 | 1361 | { |
4bb6b515 | 1362 | int wlen; |
85b4aa49 RL |
1363 | u32 crc; |
1364 | struct ethhdr *eh; | |
1365 | struct fcoe_crc_eof *cp; | |
1366 | struct sk_buff *skb; | |
1367 | struct fcoe_dev_stats *stats; | |
1368 | struct fc_frame_header *fh; | |
1369 | unsigned int hlen; /* header length implies the version */ | |
1370 | unsigned int tlen; /* trailer length */ | |
1371 | unsigned int elen; /* eth header, may include vlan */ | |
1875f27e | 1372 | struct fcoe_port *port = lport_priv(lport); |
3fe9a0ba | 1373 | struct fcoe_interface *fcoe = port->fcoe; |
85b4aa49 RL |
1374 | u8 sof, eof; |
1375 | struct fcoe_hdr *hp; | |
1376 | ||
1377 | WARN_ON((fr_len(fp) % sizeof(u32)) != 0); | |
1378 | ||
85b4aa49 | 1379 | fh = fc_frame_header_get(fp); |
97c8389d JE |
1380 | skb = fp_skb(fp); |
1381 | wlen = skb->len / FCOE_WORD_TO_BYTE; | |
1382 | ||
1875f27e | 1383 | if (!lport->link_up) { |
3caf02ee | 1384 | kfree_skb(skb); |
97c8389d | 1385 | return 0; |
85b4aa49 RL |
1386 | } |
1387 | ||
97c8389d | 1388 | if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) && |
1875f27e | 1389 | fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb)) |
97c8389d JE |
1390 | return 0; |
1391 | ||
85b4aa49 RL |
1392 | sof = fr_sof(fp); |
1393 | eof = fr_eof(fp); | |
1394 | ||
4e57e1cb | 1395 | elen = sizeof(struct ethhdr); |
85b4aa49 RL |
1396 | hlen = sizeof(struct fcoe_hdr); |
1397 | tlen = sizeof(struct fcoe_crc_eof); | |
1398 | wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; | |
1399 | ||
1400 | /* crc offload */ | |
1875f27e | 1401 | if (likely(lport->crc_offload)) { |
39ca9a06 | 1402 | skb->ip_summed = CHECKSUM_PARTIAL; |
85b4aa49 RL |
1403 | skb->csum_start = skb_headroom(skb); |
1404 | skb->csum_offset = skb->len; | |
1405 | crc = 0; | |
1406 | } else { | |
1407 | skb->ip_summed = CHECKSUM_NONE; | |
1408 | crc = fcoe_fc_crc(fp); | |
1409 | } | |
1410 | ||
014f5c3f | 1411 | /* copy port crc and eof to the skb buff */ |
85b4aa49 RL |
1412 | if (skb_is_nonlinear(skb)) { |
1413 | skb_frag_t *frag; | |
1414 | if (fcoe_get_paged_crc_eof(skb, tlen)) { | |
e9041581 | 1415 | kfree_skb(skb); |
85b4aa49 RL |
1416 | return -ENOMEM; |
1417 | } | |
1418 | frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; | |
1419 | cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ) | |
1420 | + frag->page_offset; | |
1421 | } else { | |
1422 | cp = (struct fcoe_crc_eof *)skb_put(skb, tlen); | |
1423 | } | |
1424 | ||
1425 | memset(cp, 0, sizeof(*cp)); | |
1426 | cp->fcoe_eof = eof; | |
1427 | cp->fcoe_crc32 = cpu_to_le32(~crc); | |
1428 | ||
1429 | if (skb_is_nonlinear(skb)) { | |
1430 | kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ); | |
1431 | cp = NULL; | |
1432 | } | |
1433 | ||
014f5c3f | 1434 | /* adjust skb network/transport offsets to match mac/fcoe/port */ |
85b4aa49 RL |
1435 | skb_push(skb, elen + hlen); |
1436 | skb_reset_mac_header(skb); | |
1437 | skb_reset_network_header(skb); | |
1438 | skb->mac_len = elen; | |
211c738d | 1439 | skb->protocol = htons(ETH_P_FCOE); |
3fe9a0ba | 1440 | skb->dev = fcoe->netdev; |
85b4aa49 RL |
1441 | |
1442 | /* fill up mac and fcoe headers */ | |
1443 | eh = eth_hdr(skb); | |
1444 | eh->h_proto = htons(ETH_P_FCOE); | |
3fe9a0ba | 1445 | if (fcoe->ctlr.map_dest) |
85b4aa49 RL |
1446 | fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id); |
1447 | else | |
1448 | /* insert GW address */ | |
3fe9a0ba | 1449 | memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN); |
85b4aa49 | 1450 | |
3fe9a0ba CL |
1451 | if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN)) |
1452 | memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN); | |
85b4aa49 | 1453 | else |
11b56188 | 1454 | memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); |
85b4aa49 RL |
1455 | |
1456 | hp = (struct fcoe_hdr *)(eh + 1); | |
1457 | memset(hp, 0, sizeof(*hp)); | |
1458 | if (FC_FCOE_VER) | |
1459 | FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); | |
1460 | hp->fcoe_sof = sof; | |
1461 | ||
39ca9a06 | 1462 | /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ |
1875f27e | 1463 | if (lport->seq_offload && fr_max_payload(fp)) { |
39ca9a06 YZ |
1464 | skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; |
1465 | skb_shinfo(skb)->gso_size = fr_max_payload(fp); | |
1466 | } else { | |
1467 | skb_shinfo(skb)->gso_type = 0; | |
1468 | skb_shinfo(skb)->gso_size = 0; | |
1469 | } | |
85b4aa49 | 1470 | /* update tx stats: regardless if LLD fails */ |
1875f27e | 1471 | stats = fc_lport_get_stats(lport); |
582b45bc RL |
1472 | stats->TxFrames++; |
1473 | stats->TxWords += wlen; | |
85b4aa49 RL |
1474 | |
1475 | /* send down to lld */ | |
1875f27e | 1476 | fr_dev(fp) = lport; |
014f5c3f | 1477 | if (port->fcoe_pending_queue.qlen) |
1875f27e | 1478 | fcoe_check_wait_queue(lport, skb); |
4bb6b515 | 1479 | else if (fcoe_start_io(skb)) |
1875f27e | 1480 | fcoe_check_wait_queue(lport, skb); |
85b4aa49 RL |
1481 | |
1482 | return 0; | |
1483 | } | |
85b4aa49 | 1484 | |
e7a51997 | 1485 | /** |
1875f27e RL |
1486 | * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion |
1487 | * @skb: The completed skb (argument required by destructor) | |
e7a51997 JE |
1488 | */ |
1489 | static void fcoe_percpu_flush_done(struct sk_buff *skb) | |
1490 | { | |
1491 | complete(&fcoe_flush_completion); | |
1492 | } | |
1493 | ||
34f42a07 | 1494 | /** |
1875f27e RL |
1495 | * fcoe_percpu_receive_thread() - The per-CPU packet receive thread |
1496 | * @arg: The per-CPU context | |
85b4aa49 RL |
1497 | * |
1498 | * Return: 0 for success | |
85b4aa49 RL |
1499 | */ |
1500 | int fcoe_percpu_receive_thread(void *arg) | |
1501 | { | |
1502 | struct fcoe_percpu_s *p = arg; | |
1503 | u32 fr_len; | |
1875f27e | 1504 | struct fc_lport *lport; |
85b4aa49 RL |
1505 | struct fcoe_rcv_info *fr; |
1506 | struct fcoe_dev_stats *stats; | |
1507 | struct fc_frame_header *fh; | |
1508 | struct sk_buff *skb; | |
1509 | struct fcoe_crc_eof crc_eof; | |
1510 | struct fc_frame *fp; | |
1511 | u8 *mac = NULL; | |
014f5c3f | 1512 | struct fcoe_port *port; |
85b4aa49 RL |
1513 | struct fcoe_hdr *hp; |
1514 | ||
4469c195 | 1515 | set_user_nice(current, -20); |
85b4aa49 RL |
1516 | |
1517 | while (!kthread_should_stop()) { | |
1518 | ||
1519 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1520 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) { | |
1521 | set_current_state(TASK_INTERRUPTIBLE); | |
1522 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1523 | schedule(); | |
1524 | set_current_state(TASK_RUNNING); | |
1525 | if (kthread_should_stop()) | |
1526 | return 0; | |
1527 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1528 | } | |
1529 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1530 | fr = fcoe_dev_from_skb(skb); | |
1875f27e RL |
1531 | lport = fr->fr_dev; |
1532 | if (unlikely(!lport)) { | |
e7a51997 JE |
1533 | if (skb->destructor != fcoe_percpu_flush_done) |
1534 | FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb"); | |
85b4aa49 RL |
1535 | kfree_skb(skb); |
1536 | continue; | |
1537 | } | |
1538 | ||
d5488eb9 RL |
1539 | FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d " |
1540 | "head:%p data:%p tail:%p end:%p sum:%d dev:%s", | |
1541 | skb->len, skb->data_len, | |
1542 | skb->head, skb->data, skb_tail_pointer(skb), | |
1543 | skb_end_pointer(skb), skb->csum, | |
1544 | skb->dev ? skb->dev->name : "<NULL>"); | |
85b4aa49 RL |
1545 | |
1546 | /* | |
1547 | * Save source MAC address before discarding header. | |
1548 | */ | |
1875f27e | 1549 | port = lport_priv(lport); |
85b4aa49 RL |
1550 | if (skb_is_nonlinear(skb)) |
1551 | skb_linearize(skb); /* not ideal */ | |
97c8389d | 1552 | mac = eth_hdr(skb)->h_source; |
85b4aa49 RL |
1553 | |
1554 | /* | |
1555 | * Frame length checks and setting up the header pointers | |
1556 | * was done in fcoe_rcv already. | |
1557 | */ | |
1558 | hp = (struct fcoe_hdr *) skb_network_header(skb); | |
1559 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1560 | ||
1875f27e | 1561 | stats = fc_lport_get_stats(lport); |
85b4aa49 | 1562 | if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { |
582b45bc | 1563 | if (stats->ErrorFrames < 5) |
d5488eb9 | 1564 | printk(KERN_WARNING "fcoe: FCoE version " |
582b45bc RL |
1565 | "mismatch: The frame has " |
1566 | "version %x, but the " | |
1567 | "initiator supports version " | |
1568 | "%x\n", FC_FCOE_DECAPS_VER(hp), | |
1569 | FC_FCOE_VER); | |
1570 | stats->ErrorFrames++; | |
85b4aa49 RL |
1571 | kfree_skb(skb); |
1572 | continue; | |
1573 | } | |
1574 | ||
1575 | skb_pull(skb, sizeof(struct fcoe_hdr)); | |
1576 | fr_len = skb->len - sizeof(struct fcoe_crc_eof); | |
1577 | ||
582b45bc RL |
1578 | stats->RxFrames++; |
1579 | stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; | |
85b4aa49 RL |
1580 | |
1581 | fp = (struct fc_frame *)skb; | |
1582 | fc_frame_init(fp); | |
1875f27e | 1583 | fr_dev(fp) = lport; |
85b4aa49 RL |
1584 | fr_sof(fp) = hp->fcoe_sof; |
1585 | ||
1586 | /* Copy out the CRC and EOF trailer for access */ | |
1587 | if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) { | |
1588 | kfree_skb(skb); | |
1589 | continue; | |
1590 | } | |
1591 | fr_eof(fp) = crc_eof.fcoe_eof; | |
1592 | fr_crc(fp) = crc_eof.fcoe_crc32; | |
1593 | if (pskb_trim(skb, fr_len)) { | |
1594 | kfree_skb(skb); | |
1595 | continue; | |
1596 | } | |
1597 | ||
1598 | /* | |
1599 | * We only check CRC if no offload is available and if it is | |
1600 | * it's solicited data, in which case, the FCP layer would | |
1601 | * check it during the copy. | |
1602 | */ | |
1875f27e RL |
1603 | if (lport->crc_offload && |
1604 | skb->ip_summed == CHECKSUM_UNNECESSARY) | |
85b4aa49 RL |
1605 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; |
1606 | else | |
1607 | fr_flags(fp) |= FCPHF_CRC_UNCHECKED; | |
1608 | ||
1609 | fh = fc_frame_header_get(fp); | |
1610 | if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && | |
1611 | fh->fh_type == FC_TYPE_FCP) { | |
1875f27e | 1612 | fc_exch_recv(lport, fp); |
85b4aa49 RL |
1613 | continue; |
1614 | } | |
1615 | if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) { | |
1616 | if (le32_to_cpu(fr_crc(fp)) != | |
1617 | ~crc32(~0, skb->data, fr_len)) { | |
d5488eb9 | 1618 | if (stats->InvalidCRCCount < 5) |
85b4aa49 RL |
1619 | printk(KERN_WARNING "fcoe: dropping " |
1620 | "frame with CRC error\n"); | |
1621 | stats->InvalidCRCCount++; | |
1622 | stats->ErrorFrames++; | |
1623 | fc_frame_free(fp); | |
1624 | continue; | |
1625 | } | |
1626 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; | |
1627 | } | |
1875f27e | 1628 | fc_exch_recv(lport, fp); |
85b4aa49 RL |
1629 | } |
1630 | return 0; | |
1631 | } | |
1632 | ||
85b4aa49 | 1633 | /** |
1875f27e RL |
1634 | * fcoe_check_wait_queue() - Attempt to clear the transmit backlog |
1635 | * @lport: The local port whose backlog is to be cleared | |
85b4aa49 | 1636 | * |
1875f27e RL |
1637 | * This empties the wait_queue, dequeues the head of the wait_queue queue |
1638 | * and calls fcoe_start_io() for each packet. If all skb have been | |
1639 | * transmitted it returns the qlen. If an error occurs it restores | |
1640 | * wait_queue (to try again later) and returns -1. | |
85b4aa49 | 1641 | * |
1875f27e RL |
1642 | * The wait_queue is used when the skb transmit fails. The failed skb |
1643 | * will go in the wait_queue which will be emptied by the timer function or | |
85b4aa49 | 1644 | * by the next skb transmit. |
34f42a07 | 1645 | */ |
1875f27e | 1646 | static void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb) |
85b4aa49 | 1647 | { |
1875f27e | 1648 | struct fcoe_port *port = lport_priv(lport); |
4bb6b515 | 1649 | int rc; |
85b4aa49 | 1650 | |
014f5c3f | 1651 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
4bb6b515 VD |
1652 | |
1653 | if (skb) | |
014f5c3f | 1654 | __skb_queue_tail(&port->fcoe_pending_queue, skb); |
4bb6b515 | 1655 | |
014f5c3f | 1656 | if (port->fcoe_pending_queue_active) |
c826a314 | 1657 | goto out; |
014f5c3f | 1658 | port->fcoe_pending_queue_active = 1; |
55c8bafb | 1659 | |
014f5c3f | 1660 | while (port->fcoe_pending_queue.qlen) { |
55c8bafb | 1661 | /* keep qlen > 0 until fcoe_start_io succeeds */ |
014f5c3f CL |
1662 | port->fcoe_pending_queue.qlen++; |
1663 | skb = __skb_dequeue(&port->fcoe_pending_queue); | |
55c8bafb | 1664 | |
014f5c3f | 1665 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
55c8bafb | 1666 | rc = fcoe_start_io(skb); |
014f5c3f | 1667 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
55c8bafb CL |
1668 | |
1669 | if (rc) { | |
014f5c3f | 1670 | __skb_queue_head(&port->fcoe_pending_queue, skb); |
55c8bafb | 1671 | /* undo temporary increment above */ |
014f5c3f | 1672 | port->fcoe_pending_queue.qlen--; |
55c8bafb | 1673 | break; |
85b4aa49 | 1674 | } |
55c8bafb | 1675 | /* undo temporary increment above */ |
014f5c3f | 1676 | port->fcoe_pending_queue.qlen--; |
85b4aa49 | 1677 | } |
55c8bafb | 1678 | |
014f5c3f | 1679 | if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH) |
1875f27e | 1680 | lport->qfull = 0; |
014f5c3f CL |
1681 | if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer)) |
1682 | mod_timer(&port->timer, jiffies + 2); | |
1683 | port->fcoe_pending_queue_active = 0; | |
c826a314 | 1684 | out: |
014f5c3f | 1685 | if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH) |
1875f27e | 1686 | lport->qfull = 1; |
014f5c3f | 1687 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
4bb6b515 | 1688 | return; |
85b4aa49 RL |
1689 | } |
1690 | ||
85b4aa49 | 1691 | /** |
1875f27e | 1692 | * fcoe_dev_setup() - Setup the link change notification interface |
34f42a07 | 1693 | */ |
b0d428ad | 1694 | static void fcoe_dev_setup(void) |
85b4aa49 | 1695 | { |
85b4aa49 RL |
1696 | register_netdevice_notifier(&fcoe_notifier); |
1697 | } | |
1698 | ||
1699 | /** | |
1875f27e | 1700 | * fcoe_dev_cleanup() - Cleanup the link change notification interface |
34f42a07 | 1701 | */ |
85b4aa49 RL |
1702 | static void fcoe_dev_cleanup(void) |
1703 | { | |
1704 | unregister_netdevice_notifier(&fcoe_notifier); | |
1705 | } | |
1706 | ||
1707 | /** | |
1875f27e RL |
1708 | * fcoe_device_notification() - Handler for net device events |
1709 | * @notifier: The context of the notification | |
1710 | * @event: The type of event | |
1711 | * @ptr: The net device that the event was on | |
85b4aa49 | 1712 | * |
1875f27e | 1713 | * This function is called by the Ethernet driver in case of link change event. |
85b4aa49 RL |
1714 | * |
1715 | * Returns: 0 for success | |
34f42a07 | 1716 | */ |
85b4aa49 RL |
1717 | static int fcoe_device_notification(struct notifier_block *notifier, |
1718 | ulong event, void *ptr) | |
1719 | { | |
1875f27e | 1720 | struct fc_lport *lport = NULL; |
1d1b88dc | 1721 | struct net_device *netdev = ptr; |
014f5c3f | 1722 | struct fcoe_interface *fcoe; |
2e70e241 | 1723 | struct fcoe_port *port; |
85b4aa49 | 1724 | struct fcoe_dev_stats *stats; |
97c8389d | 1725 | u32 link_possible = 1; |
85b4aa49 RL |
1726 | u32 mfs; |
1727 | int rc = NOTIFY_OK; | |
1728 | ||
014f5c3f | 1729 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
25024989 | 1730 | if (fcoe->netdev == netdev) { |
1875f27e | 1731 | lport = fcoe->ctlr.lp; |
85b4aa49 RL |
1732 | break; |
1733 | } | |
1734 | } | |
1875f27e | 1735 | if (!lport) { |
85b4aa49 RL |
1736 | rc = NOTIFY_DONE; |
1737 | goto out; | |
1738 | } | |
1739 | ||
85b4aa49 RL |
1740 | switch (event) { |
1741 | case NETDEV_DOWN: | |
1742 | case NETDEV_GOING_DOWN: | |
97c8389d | 1743 | link_possible = 0; |
85b4aa49 RL |
1744 | break; |
1745 | case NETDEV_UP: | |
1746 | case NETDEV_CHANGE: | |
85b4aa49 RL |
1747 | break; |
1748 | case NETDEV_CHANGEMTU: | |
7221d7e5 YZ |
1749 | if (netdev->features & NETIF_F_FCOE_MTU) |
1750 | break; | |
1d1b88dc VD |
1751 | mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + |
1752 | sizeof(struct fcoe_crc_eof)); | |
85b4aa49 | 1753 | if (mfs >= FC_MIN_MAX_FRAME) |
1875f27e | 1754 | fc_set_mfs(lport, mfs); |
85b4aa49 RL |
1755 | break; |
1756 | case NETDEV_REGISTER: | |
1757 | break; | |
2e70e241 CL |
1758 | case NETDEV_UNREGISTER: |
1759 | list_del(&fcoe->list); | |
1760 | port = lport_priv(fcoe->ctlr.lp); | |
1761 | fcoe_interface_cleanup(fcoe); | |
1762 | schedule_work(&port->destroy_work); | |
1763 | goto out; | |
1764 | break; | |
85b4aa49 | 1765 | default: |
1d1b88dc | 1766 | FCOE_NETDEV_DBG(netdev, "Unknown event %ld " |
d5488eb9 | 1767 | "from netdev netlink\n", event); |
85b4aa49 | 1768 | } |
1875f27e | 1769 | if (link_possible && !fcoe_link_ok(lport)) |
3fe9a0ba CL |
1770 | fcoe_ctlr_link_up(&fcoe->ctlr); |
1771 | else if (fcoe_ctlr_link_down(&fcoe->ctlr)) { | |
1875f27e | 1772 | stats = fc_lport_get_stats(lport); |
97c8389d | 1773 | stats->LinkFailureCount++; |
1875f27e | 1774 | fcoe_clean_pending_queue(lport); |
85b4aa49 RL |
1775 | } |
1776 | out: | |
1777 | return rc; | |
1778 | } | |
1779 | ||
1780 | /** | |
1875f27e RL |
1781 | * fcoe_if_to_netdev() - Parse a name buffer to get a net device |
1782 | * @buffer: The name of the net device | |
85b4aa49 | 1783 | * |
1875f27e | 1784 | * Returns: NULL or a ptr to net_device |
34f42a07 | 1785 | */ |
85b4aa49 RL |
1786 | static struct net_device *fcoe_if_to_netdev(const char *buffer) |
1787 | { | |
1788 | char *cp; | |
1789 | char ifname[IFNAMSIZ + 2]; | |
1790 | ||
1791 | if (buffer) { | |
1792 | strlcpy(ifname, buffer, IFNAMSIZ); | |
1793 | cp = ifname + strlen(ifname); | |
1794 | while (--cp >= ifname && *cp == '\n') | |
1795 | *cp = '\0'; | |
1796 | return dev_get_by_name(&init_net, ifname); | |
1797 | } | |
1798 | return NULL; | |
1799 | } | |
1800 | ||
85b4aa49 | 1801 | /** |
1875f27e RL |
1802 | * fcoe_destroy() - Destroy a FCoE interface |
1803 | * @buffer: The name of the Ethernet interface to be destroyed | |
1804 | * @kp: The associated kernel parameter | |
1805 | * | |
1806 | * Called from sysfs. | |
85b4aa49 RL |
1807 | * |
1808 | * Returns: 0 for success | |
34f42a07 | 1809 | */ |
85b4aa49 RL |
1810 | static int fcoe_destroy(const char *buffer, struct kernel_param *kp) |
1811 | { | |
030f4e00 | 1812 | struct fcoe_interface *fcoe; |
2e70e241 | 1813 | struct net_device *netdev; |
8eca355f | 1814 | int rc = 0; |
85b4aa49 | 1815 | |
dfc1d0fe CL |
1816 | mutex_lock(&fcoe_config_mutex); |
1817 | #ifdef CONFIG_FCOE_MODULE | |
1818 | /* | |
1819 | * Make sure the module has been initialized, and is not about to be | |
1820 | * removed. Module paramter sysfs files are writable before the | |
1821 | * module_init function is called and after module_exit. | |
1822 | */ | |
1823 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
1824 | rc = -ENODEV; | |
1825 | goto out_nodev; | |
1826 | } | |
1827 | #endif | |
1828 | ||
85b4aa49 RL |
1829 | netdev = fcoe_if_to_netdev(buffer); |
1830 | if (!netdev) { | |
1831 | rc = -ENODEV; | |
1832 | goto out_nodev; | |
1833 | } | |
2e70e241 | 1834 | |
090eb6c4 | 1835 | rtnl_lock(); |
2e70e241 CL |
1836 | fcoe = fcoe_hostlist_lookup_port(netdev); |
1837 | if (!fcoe) { | |
090eb6c4 | 1838 | rtnl_unlock(); |
85b4aa49 RL |
1839 | rc = -ENODEV; |
1840 | goto out_putdev; | |
1841 | } | |
2e70e241 | 1842 | list_del(&fcoe->list); |
2e70e241 CL |
1843 | fcoe_interface_cleanup(fcoe); |
1844 | rtnl_unlock(); | |
1845 | fcoe_if_destroy(fcoe->ctlr.lp); | |
85b4aa49 RL |
1846 | out_putdev: |
1847 | dev_put(netdev); | |
1848 | out_nodev: | |
dfc1d0fe | 1849 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 RL |
1850 | return rc; |
1851 | } | |
1852 | ||
1875f27e RL |
1853 | /** |
1854 | * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context | |
1855 | * @work: Handle to the FCoE port to be destroyed | |
1856 | */ | |
2e70e241 CL |
1857 | static void fcoe_destroy_work(struct work_struct *work) |
1858 | { | |
1859 | struct fcoe_port *port; | |
1860 | ||
1861 | port = container_of(work, struct fcoe_port, destroy_work); | |
1862 | mutex_lock(&fcoe_config_mutex); | |
1863 | fcoe_if_destroy(port->lport); | |
1864 | mutex_unlock(&fcoe_config_mutex); | |
1865 | } | |
1866 | ||
85b4aa49 | 1867 | /** |
1875f27e RL |
1868 | * fcoe_create() - Create a fcoe interface |
1869 | * @buffer: The name of the Ethernet interface to create on | |
1870 | * @kp: The associated kernel param | |
1871 | * | |
1872 | * Called from sysfs. | |
85b4aa49 RL |
1873 | * |
1874 | * Returns: 0 for success | |
34f42a07 | 1875 | */ |
85b4aa49 RL |
1876 | static int fcoe_create(const char *buffer, struct kernel_param *kp) |
1877 | { | |
1878 | int rc; | |
030f4e00 | 1879 | struct fcoe_interface *fcoe; |
af7f85d9 | 1880 | struct fc_lport *lport; |
85b4aa49 RL |
1881 | struct net_device *netdev; |
1882 | ||
dfc1d0fe CL |
1883 | mutex_lock(&fcoe_config_mutex); |
1884 | #ifdef CONFIG_FCOE_MODULE | |
1885 | /* | |
1886 | * Make sure the module has been initialized, and is not about to be | |
1887 | * removed. Module paramter sysfs files are writable before the | |
1888 | * module_init function is called and after module_exit. | |
1889 | */ | |
1890 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
1891 | rc = -ENODEV; | |
1892 | goto out_nodev; | |
1893 | } | |
1894 | #endif | |
1895 | ||
2e70e241 | 1896 | rtnl_lock(); |
85b4aa49 RL |
1897 | netdev = fcoe_if_to_netdev(buffer); |
1898 | if (!netdev) { | |
1899 | rc = -ENODEV; | |
1900 | goto out_nodev; | |
1901 | } | |
2e70e241 | 1902 | |
85b4aa49 RL |
1903 | /* look for existing lport */ |
1904 | if (fcoe_hostlist_lookup(netdev)) { | |
1905 | rc = -EEXIST; | |
1906 | goto out_putdev; | |
1907 | } | |
85b4aa49 | 1908 | |
030f4e00 CL |
1909 | fcoe = fcoe_interface_create(netdev); |
1910 | if (!fcoe) { | |
1911 | rc = -ENOMEM; | |
1912 | goto out_putdev; | |
1913 | } | |
1914 | ||
9a05753b | 1915 | lport = fcoe_if_create(fcoe, &netdev->dev, 0); |
af7f85d9 | 1916 | if (IS_ERR(lport)) { |
d5488eb9 | 1917 | printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", |
85b4aa49 | 1918 | netdev->name); |
85b4aa49 | 1919 | rc = -EIO; |
2e70e241 | 1920 | fcoe_interface_cleanup(fcoe); |
030f4e00 | 1921 | goto out_free; |
85b4aa49 | 1922 | } |
030f4e00 | 1923 | |
54b649f8 CL |
1924 | /* Make this the "master" N_Port */ |
1925 | fcoe->ctlr.lp = lport; | |
1926 | ||
c863df33 CL |
1927 | /* add to lports list */ |
1928 | fcoe_hostlist_add(lport); | |
1929 | ||
54b649f8 CL |
1930 | /* start FIP Discovery and FLOGI */ |
1931 | lport->boot_time = jiffies; | |
1932 | fc_fabric_login(lport); | |
1933 | if (!fcoe_link_ok(lport)) | |
1934 | fcoe_ctlr_link_up(&fcoe->ctlr); | |
030f4e00 | 1935 | |
54b649f8 | 1936 | rc = 0; |
030f4e00 | 1937 | out_free: |
54b649f8 CL |
1938 | /* |
1939 | * Release from init in fcoe_interface_create(), on success lport | |
1940 | * should be holding a reference taken in fcoe_if_create(). | |
1941 | */ | |
030f4e00 | 1942 | fcoe_interface_put(fcoe); |
85b4aa49 RL |
1943 | out_putdev: |
1944 | dev_put(netdev); | |
1945 | out_nodev: | |
2e70e241 | 1946 | rtnl_unlock(); |
dfc1d0fe | 1947 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 RL |
1948 | return rc; |
1949 | } | |
1950 | ||
34f42a07 | 1951 | /** |
1875f27e RL |
1952 | * fcoe_link_ok() - Check if the link is OK for a local port |
1953 | * @lport: The local port to check link on | |
85b4aa49 RL |
1954 | * |
1955 | * Any permanently-disqualifying conditions have been previously checked. | |
1956 | * This also updates the speed setting, which may change with link for 100/1000. | |
1957 | * | |
1958 | * This function should probably be checking for PAUSE support at some point | |
1959 | * in the future. Currently Per-priority-pause is not determinable using | |
1960 | * ethtool, so we shouldn't be restrictive until that problem is resolved. | |
1961 | * | |
1962 | * Returns: 0 if link is OK for use by FCoE. | |
1963 | * | |
1964 | */ | |
1875f27e | 1965 | int fcoe_link_ok(struct fc_lport *lport) |
85b4aa49 | 1966 | { |
1875f27e RL |
1967 | struct fcoe_port *port = lport_priv(lport); |
1968 | struct net_device *netdev = port->fcoe->netdev; | |
85b4aa49 | 1969 | struct ethtool_cmd ecmd = { ETHTOOL_GSET }; |
85b4aa49 | 1970 | |
1875f27e RL |
1971 | if ((netdev->flags & IFF_UP) && netif_carrier_ok(netdev) && |
1972 | (!dev_ethtool_get_settings(netdev, &ecmd))) { | |
1973 | lport->link_supported_speeds &= | |
2f718d64 YZ |
1974 | ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT); |
1975 | if (ecmd.supported & (SUPPORTED_1000baseT_Half | | |
1976 | SUPPORTED_1000baseT_Full)) | |
1875f27e | 1977 | lport->link_supported_speeds |= FC_PORTSPEED_1GBIT; |
2f718d64 | 1978 | if (ecmd.supported & SUPPORTED_10000baseT_Full) |
1875f27e | 1979 | lport->link_supported_speeds |= |
2f718d64 YZ |
1980 | FC_PORTSPEED_10GBIT; |
1981 | if (ecmd.speed == SPEED_1000) | |
1875f27e | 1982 | lport->link_speed = FC_PORTSPEED_1GBIT; |
2f718d64 | 1983 | if (ecmd.speed == SPEED_10000) |
1875f27e | 1984 | lport->link_speed = FC_PORTSPEED_10GBIT; |
85b4aa49 | 1985 | |
2f718d64 YZ |
1986 | return 0; |
1987 | } | |
1988 | return -1; | |
85b4aa49 | 1989 | } |
85b4aa49 | 1990 | |
34f42a07 | 1991 | /** |
1875f27e RL |
1992 | * fcoe_percpu_clean() - Clear all pending skbs for an local port |
1993 | * @lport: The local port whose skbs are to be cleared | |
e7a51997 JE |
1994 | * |
1995 | * Must be called with fcoe_create_mutex held to single-thread completion. | |
1996 | * | |
1997 | * This flushes the pending skbs by adding a new skb to each queue and | |
1998 | * waiting until they are all freed. This assures us that not only are | |
1999 | * there no packets that will be handled by the lport, but also that any | |
2000 | * threads already handling packet have returned. | |
85b4aa49 | 2001 | */ |
1875f27e | 2002 | void fcoe_percpu_clean(struct fc_lport *lport) |
85b4aa49 | 2003 | { |
85b4aa49 RL |
2004 | struct fcoe_percpu_s *pp; |
2005 | struct fcoe_rcv_info *fr; | |
2006 | struct sk_buff_head *list; | |
2007 | struct sk_buff *skb, *next; | |
2008 | struct sk_buff *head; | |
5e5e92df | 2009 | unsigned int cpu; |
85b4aa49 | 2010 | |
5e5e92df RL |
2011 | for_each_possible_cpu(cpu) { |
2012 | pp = &per_cpu(fcoe_percpu, cpu); | |
2013 | spin_lock_bh(&pp->fcoe_rx_list.lock); | |
2014 | list = &pp->fcoe_rx_list; | |
2015 | head = list->next; | |
2016 | for (skb = head; skb != (struct sk_buff *)list; | |
2017 | skb = next) { | |
2018 | next = skb->next; | |
2019 | fr = fcoe_dev_from_skb(skb); | |
1875f27e | 2020 | if (fr->fr_dev == lport) { |
5e5e92df RL |
2021 | __skb_unlink(skb, list); |
2022 | kfree_skb(skb); | |
85b4aa49 | 2023 | } |
85b4aa49 | 2024 | } |
e7a51997 JE |
2025 | |
2026 | if (!pp->thread || !cpu_online(cpu)) { | |
2027 | spin_unlock_bh(&pp->fcoe_rx_list.lock); | |
2028 | continue; | |
2029 | } | |
2030 | ||
2031 | skb = dev_alloc_skb(0); | |
2032 | if (!skb) { | |
2033 | spin_unlock_bh(&pp->fcoe_rx_list.lock); | |
2034 | continue; | |
2035 | } | |
2036 | skb->destructor = fcoe_percpu_flush_done; | |
2037 | ||
2038 | __skb_queue_tail(&pp->fcoe_rx_list, skb); | |
2039 | if (pp->fcoe_rx_list.qlen == 1) | |
2040 | wake_up_process(pp->thread); | |
5e5e92df | 2041 | spin_unlock_bh(&pp->fcoe_rx_list.lock); |
e7a51997 JE |
2042 | |
2043 | wait_for_completion(&fcoe_flush_completion); | |
85b4aa49 RL |
2044 | } |
2045 | } | |
85b4aa49 RL |
2046 | |
2047 | /** | |
34f42a07 | 2048 | * fcoe_clean_pending_queue() - Dequeue a skb and free it |
1875f27e | 2049 | * @lport: The local port to dequeue a skb on |
34f42a07 | 2050 | */ |
1875f27e | 2051 | void fcoe_clean_pending_queue(struct fc_lport *lport) |
85b4aa49 | 2052 | { |
1875f27e | 2053 | struct fcoe_port *port = lport_priv(lport); |
85b4aa49 RL |
2054 | struct sk_buff *skb; |
2055 | ||
014f5c3f CL |
2056 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
2057 | while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) { | |
2058 | spin_unlock_bh(&port->fcoe_pending_queue.lock); | |
85b4aa49 | 2059 | kfree_skb(skb); |
014f5c3f | 2060 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
85b4aa49 | 2061 | } |
014f5c3f | 2062 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
85b4aa49 | 2063 | } |
85b4aa49 | 2064 | |
34f42a07 | 2065 | /** |
1875f27e RL |
2066 | * fcoe_reset() - Reset a local port |
2067 | * @shost: The SCSI host associated with the local port to be reset | |
85b4aa49 | 2068 | * |
1875f27e | 2069 | * Returns: Always 0 (return value required by FC transport template) |
85b4aa49 RL |
2070 | */ |
2071 | int fcoe_reset(struct Scsi_Host *shost) | |
2072 | { | |
2073 | struct fc_lport *lport = shost_priv(shost); | |
2074 | fc_lport_reset(lport); | |
2075 | return 0; | |
2076 | } | |
85b4aa49 | 2077 | |
34f42a07 | 2078 | /** |
1875f27e RL |
2079 | * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device |
2080 | * @netdev: The net device used as a key | |
85b4aa49 | 2081 | * |
1875f27e RL |
2082 | * Locking: Must be called with the RNL mutex held. |
2083 | * | |
2084 | * Returns: NULL or the FCoE interface | |
85b4aa49 | 2085 | */ |
014f5c3f | 2086 | static struct fcoe_interface * |
1875f27e | 2087 | fcoe_hostlist_lookup_port(const struct net_device *netdev) |
85b4aa49 | 2088 | { |
014f5c3f | 2089 | struct fcoe_interface *fcoe; |
85b4aa49 | 2090 | |
014f5c3f | 2091 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
1875f27e | 2092 | if (fcoe->netdev == netdev) |
014f5c3f | 2093 | return fcoe; |
85b4aa49 | 2094 | } |
85b4aa49 RL |
2095 | return NULL; |
2096 | } | |
2097 | ||
34f42a07 | 2098 | /** |
1875f27e RL |
2099 | * fcoe_hostlist_lookup() - Find the local port associated with a |
2100 | * given net device | |
2101 | * @netdev: The netdevice used as a key | |
85b4aa49 | 2102 | * |
1875f27e RL |
2103 | * Locking: Must be called with the RTNL mutex held |
2104 | * | |
2105 | * Returns: NULL or the local port | |
85b4aa49 | 2106 | */ |
090eb6c4 | 2107 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) |
85b4aa49 | 2108 | { |
014f5c3f | 2109 | struct fcoe_interface *fcoe; |
85b4aa49 | 2110 | |
014f5c3f | 2111 | fcoe = fcoe_hostlist_lookup_port(netdev); |
3fe9a0ba | 2112 | return (fcoe) ? fcoe->ctlr.lp : NULL; |
85b4aa49 | 2113 | } |
85b4aa49 | 2114 | |
34f42a07 | 2115 | /** |
1875f27e RL |
2116 | * fcoe_hostlist_add() - Add the FCoE interface identified by a local |
2117 | * port to the hostlist | |
2118 | * @lport: The local port that identifies the FCoE interface to be added | |
85b4aa49 | 2119 | * |
090eb6c4 | 2120 | * Locking: must be called with the RTNL mutex held |
1875f27e RL |
2121 | * |
2122 | * Returns: 0 for success | |
85b4aa49 | 2123 | */ |
090eb6c4 | 2124 | static int fcoe_hostlist_add(const struct fc_lport *lport) |
85b4aa49 | 2125 | { |
014f5c3f CL |
2126 | struct fcoe_interface *fcoe; |
2127 | struct fcoe_port *port; | |
2128 | ||
2129 | fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); | |
2130 | if (!fcoe) { | |
2131 | port = lport_priv(lport); | |
2132 | fcoe = port->fcoe; | |
2133 | list_add_tail(&fcoe->list, &fcoe_hostlist); | |
85b4aa49 RL |
2134 | } |
2135 | return 0; | |
2136 | } | |
85b4aa49 | 2137 | |
85b4aa49 | 2138 | /** |
1875f27e | 2139 | * fcoe_init() - Initialize fcoe.ko |
85b4aa49 | 2140 | * |
1875f27e | 2141 | * Returns: 0 on success, or a negative value on failure |
34f42a07 | 2142 | */ |
85b4aa49 RL |
2143 | static int __init fcoe_init(void) |
2144 | { | |
1875f27e | 2145 | struct fcoe_percpu_s *p; |
38eccabd | 2146 | unsigned int cpu; |
8976f424 | 2147 | int rc = 0; |
85b4aa49 | 2148 | |
dfc1d0fe CL |
2149 | mutex_lock(&fcoe_config_mutex); |
2150 | ||
38eccabd | 2151 | for_each_possible_cpu(cpu) { |
5e5e92df | 2152 | p = &per_cpu(fcoe_percpu, cpu); |
38eccabd RL |
2153 | skb_queue_head_init(&p->fcoe_rx_list); |
2154 | } | |
2155 | ||
8976f424 RL |
2156 | for_each_online_cpu(cpu) |
2157 | fcoe_percpu_thread_create(cpu); | |
85b4aa49 | 2158 | |
8976f424 RL |
2159 | /* Initialize per CPU interrupt thread */ |
2160 | rc = register_hotcpu_notifier(&fcoe_cpu_notifier); | |
2161 | if (rc) | |
2162 | goto out_free; | |
85b4aa49 | 2163 | |
8976f424 | 2164 | /* Setup link change notification */ |
85b4aa49 RL |
2165 | fcoe_dev_setup(); |
2166 | ||
5892c32f CL |
2167 | rc = fcoe_if_init(); |
2168 | if (rc) | |
2169 | goto out_free; | |
85b4aa49 | 2170 | |
dfc1d0fe | 2171 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 | 2172 | return 0; |
8976f424 RL |
2173 | |
2174 | out_free: | |
2175 | for_each_online_cpu(cpu) { | |
2176 | fcoe_percpu_thread_destroy(cpu); | |
2177 | } | |
dfc1d0fe | 2178 | mutex_unlock(&fcoe_config_mutex); |
8976f424 | 2179 | return rc; |
85b4aa49 RL |
2180 | } |
2181 | module_init(fcoe_init); | |
2182 | ||
2183 | /** | |
1875f27e | 2184 | * fcoe_exit() - Clean up fcoe.ko |
85b4aa49 | 2185 | * |
1875f27e | 2186 | * Returns: 0 on success or a negative value on failure |
34f42a07 | 2187 | */ |
85b4aa49 RL |
2188 | static void __exit fcoe_exit(void) |
2189 | { | |
014f5c3f | 2190 | struct fcoe_interface *fcoe, *tmp; |
2e70e241 | 2191 | struct fcoe_port *port; |
1875f27e | 2192 | unsigned int cpu; |
85b4aa49 | 2193 | |
dfc1d0fe CL |
2194 | mutex_lock(&fcoe_config_mutex); |
2195 | ||
85b4aa49 RL |
2196 | fcoe_dev_cleanup(); |
2197 | ||
5919a595 | 2198 | /* releases the associated fcoe hosts */ |
090eb6c4 CL |
2199 | rtnl_lock(); |
2200 | list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { | |
c863df33 | 2201 | list_del(&fcoe->list); |
2e70e241 | 2202 | port = lport_priv(fcoe->ctlr.lp); |
2e70e241 | 2203 | fcoe_interface_cleanup(fcoe); |
2e70e241 | 2204 | schedule_work(&port->destroy_work); |
c863df33 | 2205 | } |
090eb6c4 | 2206 | rtnl_unlock(); |
85b4aa49 | 2207 | |
8976f424 RL |
2208 | unregister_hotcpu_notifier(&fcoe_cpu_notifier); |
2209 | ||
014f5c3f | 2210 | for_each_online_cpu(cpu) |
8976f424 | 2211 | fcoe_percpu_thread_destroy(cpu); |
85b4aa49 | 2212 | |
dfc1d0fe | 2213 | mutex_unlock(&fcoe_config_mutex); |
2e70e241 CL |
2214 | |
2215 | /* flush any asyncronous interface destroys, | |
2216 | * this should happen after the netdev notifier is unregistered */ | |
2217 | flush_scheduled_work(); | |
9a05753b CL |
2218 | /* That will flush out all the N_Ports on the hostlist, but now we |
2219 | * may have NPIV VN_Ports scheduled for destruction */ | |
2220 | flush_scheduled_work(); | |
2e70e241 CL |
2221 | |
2222 | /* detach from scsi transport | |
2223 | * must happen after all destroys are done, therefor after the flush */ | |
2224 | fcoe_if_exit(); | |
85b4aa49 RL |
2225 | } |
2226 | module_exit(fcoe_exit); | |
11b56188 CL |
2227 | |
2228 | /** | |
2229 | * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler | |
2230 | * @seq: active sequence in the FLOGI or FDISC exchange | |
2231 | * @fp: response frame, or error encoded in a pointer (timeout) | |
2232 | * @arg: pointer the the fcoe_ctlr structure | |
2233 | * | |
2234 | * This handles MAC address managment for FCoE, then passes control on to | |
2235 | * the libfc FLOGI response handler. | |
2236 | */ | |
2237 | static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) | |
2238 | { | |
2239 | struct fcoe_ctlr *fip = arg; | |
2240 | struct fc_exch *exch = fc_seq_exch(seq); | |
2241 | struct fc_lport *lport = exch->lp; | |
2242 | u8 *mac; | |
2243 | ||
2244 | if (IS_ERR(fp)) | |
2245 | goto done; | |
2246 | ||
2247 | mac = fr_cb(fp)->granted_mac; | |
2248 | if (is_zero_ether_addr(mac)) { | |
2249 | /* pre-FIP */ | |
2250 | mac = eth_hdr(&fp->skb)->h_source; | |
2251 | if (fcoe_ctlr_recv_flogi(fip, lport, fp, mac)) { | |
2252 | fc_frame_free(fp); | |
2253 | return; | |
2254 | } | |
2255 | } else { | |
2256 | /* FIP, libfcoe has already seen it */ | |
2257 | fip->update_mac(lport, fr_cb(fp)->granted_mac); | |
2258 | } | |
2259 | done: | |
2260 | fc_lport_flogi_resp(seq, fp, lport); | |
2261 | } | |
2262 | ||
2263 | /** | |
2264 | * fcoe_logo_resp() - FCoE specific LOGO response handler | |
2265 | * @seq: active sequence in the LOGO exchange | |
2266 | * @fp: response frame, or error encoded in a pointer (timeout) | |
2267 | * @arg: pointer the the fcoe_ctlr structure | |
2268 | * | |
2269 | * This handles MAC address managment for FCoE, then passes control on to | |
2270 | * the libfc LOGO response handler. | |
2271 | */ | |
2272 | static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) | |
2273 | { | |
2274 | struct fcoe_ctlr *fip = arg; | |
2275 | struct fc_exch *exch = fc_seq_exch(seq); | |
2276 | struct fc_lport *lport = exch->lp; | |
2277 | static u8 zero_mac[ETH_ALEN] = { 0 }; | |
2278 | ||
2279 | if (!IS_ERR(fp)) | |
2280 | fip->update_mac(lport, zero_mac); | |
2281 | fc_lport_logo_resp(seq, fp, lport); | |
2282 | } | |
2283 | ||
2284 | /** | |
2285 | * fcoe_elsct_send - FCoE specific ELS handler | |
2286 | * | |
2287 | * This does special case handling of FIP encapsualted ELS exchanges for FCoE, | |
2288 | * using FCoE specific response handlers and passing the FIP controller as | |
2289 | * the argument (the lport is still available from the exchange). | |
2290 | * | |
2291 | * Most of the work here is just handed off to the libfc routine. | |
2292 | */ | |
1875f27e RL |
2293 | static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, |
2294 | struct fc_frame *fp, unsigned int op, | |
2295 | void (*resp)(struct fc_seq *, | |
2296 | struct fc_frame *, | |
2297 | void *), | |
2298 | void *arg, u32 timeout) | |
11b56188 CL |
2299 | { |
2300 | struct fcoe_port *port = lport_priv(lport); | |
2301 | struct fcoe_interface *fcoe = port->fcoe; | |
2302 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
2303 | struct fc_frame_header *fh = fc_frame_header_get(fp); | |
2304 | ||
2305 | switch (op) { | |
2306 | case ELS_FLOGI: | |
2307 | case ELS_FDISC: | |
2308 | return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, | |
2309 | fip, timeout); | |
2310 | case ELS_LOGO: | |
2311 | /* only hook onto fabric logouts, not port logouts */ | |
2312 | if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) | |
2313 | break; | |
2314 | return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, | |
2315 | fip, timeout); | |
2316 | } | |
2317 | return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); | |
2318 | } | |
2319 | ||
9a05753b CL |
2320 | /** |
2321 | * fcoe_vport_create() - create an fc_host/scsi_host for a vport | |
2322 | * @vport: fc_vport object to create a new fc_host for | |
2323 | * @disabled: start the new fc_host in a disabled state by default? | |
2324 | * | |
2325 | * Returns: 0 for success | |
2326 | */ | |
2327 | static int fcoe_vport_create(struct fc_vport *vport, bool disabled) | |
2328 | { | |
2329 | struct Scsi_Host *shost = vport_to_shost(vport); | |
2330 | struct fc_lport *n_port = shost_priv(shost); | |
2331 | struct fcoe_port *port = lport_priv(n_port); | |
2332 | struct fcoe_interface *fcoe = port->fcoe; | |
2333 | struct net_device *netdev = fcoe->netdev; | |
2334 | struct fc_lport *vn_port; | |
2335 | ||
2336 | mutex_lock(&fcoe_config_mutex); | |
2337 | vn_port = fcoe_if_create(fcoe, &vport->dev, 1); | |
2338 | mutex_unlock(&fcoe_config_mutex); | |
2339 | ||
2340 | if (IS_ERR(vn_port)) { | |
2341 | printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", | |
2342 | netdev->name); | |
2343 | return -EIO; | |
2344 | } | |
2345 | ||
2346 | if (disabled) { | |
2347 | fc_vport_set_state(vport, FC_VPORT_DISABLED); | |
2348 | } else { | |
2349 | vn_port->boot_time = jiffies; | |
2350 | fc_fabric_login(vn_port); | |
2351 | fc_vport_setlink(vn_port); | |
2352 | } | |
2353 | return 0; | |
2354 | } | |
2355 | ||
2356 | /** | |
2357 | * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport | |
2358 | * @vport: fc_vport object that is being destroyed | |
2359 | * | |
2360 | * Returns: 0 for success | |
2361 | */ | |
2362 | static int fcoe_vport_destroy(struct fc_vport *vport) | |
2363 | { | |
2364 | struct Scsi_Host *shost = vport_to_shost(vport); | |
2365 | struct fc_lport *n_port = shost_priv(shost); | |
2366 | struct fc_lport *vn_port = vport->dd_data; | |
2367 | struct fcoe_port *port = lport_priv(vn_port); | |
2368 | ||
2369 | mutex_lock(&n_port->lp_mutex); | |
2370 | list_del(&vn_port->list); | |
2371 | mutex_unlock(&n_port->lp_mutex); | |
2372 | schedule_work(&port->destroy_work); | |
2373 | return 0; | |
2374 | } | |
2375 | ||
2376 | /** | |
2377 | * fcoe_vport_disable() - change vport state | |
2378 | * @vport: vport to bring online/offline | |
2379 | * @disable: should the vport be disabled? | |
2380 | */ | |
2381 | static int fcoe_vport_disable(struct fc_vport *vport, bool disable) | |
2382 | { | |
2383 | struct fc_lport *lport = vport->dd_data; | |
2384 | ||
2385 | if (disable) { | |
2386 | fc_vport_set_state(vport, FC_VPORT_DISABLED); | |
2387 | fc_fabric_logoff(lport); | |
2388 | } else { | |
2389 | lport->boot_time = jiffies; | |
2390 | fc_fabric_login(lport); | |
2391 | fc_vport_setlink(lport); | |
2392 | } | |
2393 | ||
2394 | return 0; | |
2395 | } | |
2396 | ||
dc8596d3 CL |
2397 | /** |
2398 | * fcoe_vport_set_symbolic_name() - append vport string to symbolic name | |
2399 | * @vport: fc_vport with a new symbolic name string | |
2400 | * | |
2401 | * After generating a new symbolic name string, a new RSPN_ID request is | |
2402 | * sent to the name server. There is no response handler, so if it fails | |
2403 | * for some reason it will not be retried. | |
2404 | */ | |
2405 | static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) | |
2406 | { | |
2407 | struct fc_lport *lport = vport->dd_data; | |
2408 | struct fc_frame *fp; | |
2409 | size_t len; | |
2410 | ||
2411 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, | |
2412 | "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, | |
2413 | fcoe_netdev(lport)->name, vport->symbolic_name); | |
2414 | ||
2415 | if (lport->state != LPORT_ST_READY) | |
2416 | return; | |
2417 | ||
2418 | len = strnlen(fc_host_symbolic_name(lport->host), 255); | |
2419 | fp = fc_frame_alloc(lport, | |
2420 | sizeof(struct fc_ct_hdr) + | |
2421 | sizeof(struct fc_ns_rspn) + len); | |
2422 | if (!fp) | |
2423 | return; | |
2424 | lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, | |
2425 | NULL, NULL, lport->e_d_tov); | |
2426 | } |