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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); | |
859b7b64 | 112 | static void fcoe_recv_frame(struct sk_buff *skb); |
1875f27e | 113 | |
b84056bf YZ |
114 | static void fcoe_get_lesb(struct fc_lport *, struct fc_els_lesb *); |
115 | ||
1875f27e RL |
116 | module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR); |
117 | __MODULE_PARM_TYPE(create, "string"); | |
118 | MODULE_PARM_DESC(create, "Create fcoe fcoe using net device passed in."); | |
119 | module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR); | |
120 | __MODULE_PARM_TYPE(destroy, "string"); | |
121 | MODULE_PARM_DESC(destroy, "Destroy fcoe fcoe"); | |
122 | ||
123 | /* notification function for packets from net device */ | |
85b4aa49 RL |
124 | static struct notifier_block fcoe_notifier = { |
125 | .notifier_call = fcoe_device_notification, | |
126 | }; | |
127 | ||
1875f27e RL |
128 | /* notification function for CPU hotplug events */ |
129 | static struct notifier_block fcoe_cpu_notifier = { | |
130 | .notifier_call = fcoe_cpu_callback, | |
131 | }; | |
132 | ||
e9084bb8 CL |
133 | static struct scsi_transport_template *fcoe_transport_template; |
134 | static struct scsi_transport_template *fcoe_vport_transport_template; | |
7f349142 | 135 | |
1875f27e RL |
136 | static int fcoe_vport_destroy(struct fc_vport *); |
137 | static int fcoe_vport_create(struct fc_vport *, bool disabled); | |
138 | static int fcoe_vport_disable(struct fc_vport *, bool disable); | |
139 | static void fcoe_set_vport_symbolic_name(struct fc_vport *); | |
140 | ||
141 | static struct libfc_function_template fcoe_libfc_fcn_templ = { | |
142 | .frame_send = fcoe_xmit, | |
143 | .ddp_setup = fcoe_ddp_setup, | |
144 | .ddp_done = fcoe_ddp_done, | |
145 | .elsct_send = fcoe_elsct_send, | |
b84056bf | 146 | .get_lesb = fcoe_get_lesb, |
1875f27e | 147 | }; |
9a05753b | 148 | |
7f349142 VD |
149 | struct fc_function_template fcoe_transport_function = { |
150 | .show_host_node_name = 1, | |
151 | .show_host_port_name = 1, | |
152 | .show_host_supported_classes = 1, | |
153 | .show_host_supported_fc4s = 1, | |
154 | .show_host_active_fc4s = 1, | |
155 | .show_host_maxframe_size = 1, | |
156 | ||
157 | .show_host_port_id = 1, | |
158 | .show_host_supported_speeds = 1, | |
159 | .get_host_speed = fc_get_host_speed, | |
160 | .show_host_speed = 1, | |
161 | .show_host_port_type = 1, | |
162 | .get_host_port_state = fc_get_host_port_state, | |
163 | .show_host_port_state = 1, | |
164 | .show_host_symbolic_name = 1, | |
165 | ||
166 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
167 | .show_rport_maxframe_size = 1, | |
168 | .show_rport_supported_classes = 1, | |
169 | ||
170 | .show_host_fabric_name = 1, | |
171 | .show_starget_node_name = 1, | |
172 | .show_starget_port_name = 1, | |
173 | .show_starget_port_id = 1, | |
174 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
175 | .show_rport_dev_loss_tmo = 1, | |
176 | .get_fc_host_stats = fc_get_host_stats, | |
177 | .issue_fc_host_lip = fcoe_reset, | |
178 | ||
179 | .terminate_rport_io = fc_rport_terminate_io, | |
9a05753b CL |
180 | |
181 | .vport_create = fcoe_vport_create, | |
182 | .vport_delete = fcoe_vport_destroy, | |
183 | .vport_disable = fcoe_vport_disable, | |
dc8596d3 | 184 | .set_vport_symbolic_name = fcoe_set_vport_symbolic_name, |
a51ab396 SM |
185 | |
186 | .bsg_request = fc_lport_bsg_request, | |
7f349142 VD |
187 | }; |
188 | ||
e9084bb8 CL |
189 | struct fc_function_template fcoe_vport_transport_function = { |
190 | .show_host_node_name = 1, | |
191 | .show_host_port_name = 1, | |
192 | .show_host_supported_classes = 1, | |
193 | .show_host_supported_fc4s = 1, | |
194 | .show_host_active_fc4s = 1, | |
195 | .show_host_maxframe_size = 1, | |
196 | ||
197 | .show_host_port_id = 1, | |
198 | .show_host_supported_speeds = 1, | |
199 | .get_host_speed = fc_get_host_speed, | |
200 | .show_host_speed = 1, | |
201 | .show_host_port_type = 1, | |
202 | .get_host_port_state = fc_get_host_port_state, | |
203 | .show_host_port_state = 1, | |
204 | .show_host_symbolic_name = 1, | |
205 | ||
206 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
207 | .show_rport_maxframe_size = 1, | |
208 | .show_rport_supported_classes = 1, | |
209 | ||
210 | .show_host_fabric_name = 1, | |
211 | .show_starget_node_name = 1, | |
212 | .show_starget_port_name = 1, | |
213 | .show_starget_port_id = 1, | |
214 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
215 | .show_rport_dev_loss_tmo = 1, | |
216 | .get_fc_host_stats = fc_get_host_stats, | |
217 | .issue_fc_host_lip = fcoe_reset, | |
218 | ||
219 | .terminate_rport_io = fc_rport_terminate_io, | |
a51ab396 SM |
220 | |
221 | .bsg_request = fc_lport_bsg_request, | |
e9084bb8 CL |
222 | }; |
223 | ||
7f349142 VD |
224 | static struct scsi_host_template fcoe_shost_template = { |
225 | .module = THIS_MODULE, | |
226 | .name = "FCoE Driver", | |
227 | .proc_name = FCOE_NAME, | |
228 | .queuecommand = fc_queuecommand, | |
229 | .eh_abort_handler = fc_eh_abort, | |
230 | .eh_device_reset_handler = fc_eh_device_reset, | |
231 | .eh_host_reset_handler = fc_eh_host_reset, | |
232 | .slave_alloc = fc_slave_alloc, | |
233 | .change_queue_depth = fc_change_queue_depth, | |
234 | .change_queue_type = fc_change_queue_type, | |
235 | .this_id = -1, | |
14caf44c | 236 | .cmd_per_lun = 3, |
7f349142 VD |
237 | .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, |
238 | .use_clustering = ENABLE_CLUSTERING, | |
239 | .sg_tablesize = SG_ALL, | |
240 | .max_sectors = 0xffff, | |
241 | }; | |
242 | ||
54b649f8 | 243 | /** |
1875f27e RL |
244 | * fcoe_interface_setup() - Setup a FCoE interface |
245 | * @fcoe: The new FCoE interface | |
246 | * @netdev: The net device that the fcoe interface is on | |
54b649f8 CL |
247 | * |
248 | * Returns : 0 for success | |
2e70e241 | 249 | * Locking: must be called with the RTNL mutex held |
54b649f8 CL |
250 | */ |
251 | static int fcoe_interface_setup(struct fcoe_interface *fcoe, | |
252 | struct net_device *netdev) | |
253 | { | |
254 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
255 | struct netdev_hw_addr *ha; | |
5bab87e6 | 256 | struct net_device *real_dev; |
54b649f8 | 257 | u8 flogi_maddr[ETH_ALEN]; |
b7a727f1 | 258 | const struct net_device_ops *ops; |
54b649f8 CL |
259 | |
260 | fcoe->netdev = netdev; | |
261 | ||
b7a727f1 YZ |
262 | /* Let LLD initialize for FCoE */ |
263 | ops = netdev->netdev_ops; | |
264 | if (ops->ndo_fcoe_enable) { | |
265 | if (ops->ndo_fcoe_enable(netdev)) | |
266 | FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE" | |
267 | " specific feature for LLD.\n"); | |
268 | } | |
269 | ||
54b649f8 CL |
270 | /* Do not support for bonding device */ |
271 | if ((netdev->priv_flags & IFF_MASTER_ALB) || | |
272 | (netdev->priv_flags & IFF_SLAVE_INACTIVE) || | |
273 | (netdev->priv_flags & IFF_MASTER_8023AD)) { | |
59d92516 | 274 | FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n"); |
54b649f8 CL |
275 | return -EOPNOTSUPP; |
276 | } | |
277 | ||
278 | /* look for SAN MAC address, if multiple SAN MACs exist, only | |
279 | * use the first one for SPMA */ | |
5bab87e6 YZ |
280 | real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ? |
281 | vlan_dev_real_dev(netdev) : netdev; | |
54b649f8 | 282 | rcu_read_lock(); |
5bab87e6 | 283 | for_each_dev_addr(real_dev, ha) { |
54b649f8 | 284 | if ((ha->type == NETDEV_HW_ADDR_T_SAN) && |
bf361707 | 285 | (is_valid_ether_addr(ha->addr))) { |
54b649f8 CL |
286 | memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); |
287 | fip->spma = 1; | |
288 | break; | |
289 | } | |
290 | } | |
291 | rcu_read_unlock(); | |
292 | ||
293 | /* setup Source Mac Address */ | |
294 | if (!fip->spma) | |
295 | memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); | |
296 | ||
297 | /* | |
298 | * Add FCoE MAC address as second unicast MAC address | |
299 | * or enter promiscuous mode if not capable of listening | |
300 | * for multiple unicast MACs. | |
301 | */ | |
54b649f8 CL |
302 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
303 | dev_unicast_add(netdev, flogi_maddr); | |
304 | if (fip->spma) | |
305 | dev_unicast_add(netdev, fip->ctl_src_addr); | |
306 | dev_mc_add(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0); | |
54b649f8 CL |
307 | |
308 | /* | |
309 | * setup the receive function from ethernet driver | |
310 | * on the ethertype for the given device | |
311 | */ | |
312 | fcoe->fcoe_packet_type.func = fcoe_rcv; | |
313 | fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE); | |
314 | fcoe->fcoe_packet_type.dev = netdev; | |
315 | dev_add_pack(&fcoe->fcoe_packet_type); | |
316 | ||
317 | fcoe->fip_packet_type.func = fcoe_fip_recv; | |
318 | fcoe->fip_packet_type.type = htons(ETH_P_FIP); | |
319 | fcoe->fip_packet_type.dev = netdev; | |
320 | dev_add_pack(&fcoe->fip_packet_type); | |
321 | ||
322 | return 0; | |
323 | } | |
324 | ||
030f4e00 | 325 | /** |
1875f27e RL |
326 | * fcoe_interface_create() - Create a FCoE interface on a net device |
327 | * @netdev: The net device to create the FCoE interface on | |
030f4e00 CL |
328 | * |
329 | * Returns: pointer to a struct fcoe_interface or NULL on error | |
330 | */ | |
331 | static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev) | |
332 | { | |
333 | struct fcoe_interface *fcoe; | |
59d92516 | 334 | int err; |
030f4e00 CL |
335 | |
336 | fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL); | |
337 | if (!fcoe) { | |
338 | FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n"); | |
339 | return NULL; | |
340 | } | |
341 | ||
2e70e241 | 342 | dev_hold(netdev); |
030f4e00 | 343 | kref_init(&fcoe->kref); |
54b649f8 CL |
344 | |
345 | /* | |
346 | * Initialize FIP. | |
347 | */ | |
348 | fcoe_ctlr_init(&fcoe->ctlr); | |
349 | fcoe->ctlr.send = fcoe_fip_send; | |
350 | fcoe->ctlr.update_mac = fcoe_update_src_mac; | |
11b56188 | 351 | fcoe->ctlr.get_src_addr = fcoe_get_src_mac; |
54b649f8 | 352 | |
59d92516 | 353 | err = fcoe_interface_setup(fcoe, netdev); |
354 | if (err) { | |
355 | fcoe_ctlr_destroy(&fcoe->ctlr); | |
356 | kfree(fcoe); | |
357 | dev_put(netdev); | |
358 | return NULL; | |
359 | } | |
030f4e00 CL |
360 | |
361 | return fcoe; | |
362 | } | |
363 | ||
54b649f8 | 364 | /** |
1875f27e RL |
365 | * fcoe_interface_cleanup() - Clean up a FCoE interface |
366 | * @fcoe: The FCoE interface to be cleaned up | |
2e70e241 CL |
367 | * |
368 | * Caller must be holding the RTNL mutex | |
54b649f8 CL |
369 | */ |
370 | void fcoe_interface_cleanup(struct fcoe_interface *fcoe) | |
371 | { | |
372 | struct net_device *netdev = fcoe->netdev; | |
373 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
374 | u8 flogi_maddr[ETH_ALEN]; | |
b7a727f1 | 375 | const struct net_device_ops *ops; |
54b649f8 CL |
376 | |
377 | /* | |
378 | * Don't listen for Ethernet packets anymore. | |
379 | * synchronize_net() ensures that the packet handlers are not running | |
380 | * on another CPU. dev_remove_pack() would do that, this calls the | |
381 | * unsyncronized version __dev_remove_pack() to avoid multiple delays. | |
382 | */ | |
383 | __dev_remove_pack(&fcoe->fcoe_packet_type); | |
384 | __dev_remove_pack(&fcoe->fip_packet_type); | |
385 | synchronize_net(); | |
386 | ||
54b649f8 | 387 | /* Delete secondary MAC addresses */ |
54b649f8 CL |
388 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
389 | dev_unicast_delete(netdev, flogi_maddr); | |
54b649f8 CL |
390 | if (fip->spma) |
391 | dev_unicast_delete(netdev, fip->ctl_src_addr); | |
392 | dev_mc_delete(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0); | |
b7a727f1 YZ |
393 | |
394 | /* Tell the LLD we are done w/ FCoE */ | |
395 | ops = netdev->netdev_ops; | |
396 | if (ops->ndo_fcoe_disable) { | |
397 | if (ops->ndo_fcoe_disable(netdev)) | |
398 | FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" | |
399 | " specific feature for LLD.\n"); | |
400 | } | |
54b649f8 CL |
401 | } |
402 | ||
030f4e00 CL |
403 | /** |
404 | * fcoe_interface_release() - fcoe_port kref release function | |
1875f27e | 405 | * @kref: Embedded reference count in an fcoe_interface struct |
030f4e00 CL |
406 | */ |
407 | static void fcoe_interface_release(struct kref *kref) | |
408 | { | |
409 | struct fcoe_interface *fcoe; | |
2e70e241 | 410 | struct net_device *netdev; |
030f4e00 CL |
411 | |
412 | fcoe = container_of(kref, struct fcoe_interface, kref); | |
2e70e241 CL |
413 | netdev = fcoe->netdev; |
414 | /* tear-down the FCoE controller */ | |
415 | fcoe_ctlr_destroy(&fcoe->ctlr); | |
030f4e00 | 416 | kfree(fcoe); |
2e70e241 | 417 | dev_put(netdev); |
030f4e00 CL |
418 | } |
419 | ||
420 | /** | |
1875f27e RL |
421 | * fcoe_interface_get() - Get a reference to a FCoE interface |
422 | * @fcoe: The FCoE interface to be held | |
030f4e00 CL |
423 | */ |
424 | static inline void fcoe_interface_get(struct fcoe_interface *fcoe) | |
425 | { | |
426 | kref_get(&fcoe->kref); | |
427 | } | |
428 | ||
429 | /** | |
1875f27e RL |
430 | * fcoe_interface_put() - Put a reference to a FCoE interface |
431 | * @fcoe: The FCoE interface to be released | |
030f4e00 CL |
432 | */ |
433 | static inline void fcoe_interface_put(struct fcoe_interface *fcoe) | |
434 | { | |
435 | kref_put(&fcoe->kref, fcoe_interface_release); | |
436 | } | |
437 | ||
ab6b85c1 | 438 | /** |
1875f27e RL |
439 | * fcoe_fip_recv() - Handler for received FIP frames |
440 | * @skb: The receive skb | |
441 | * @netdev: The associated net device | |
442 | * @ptype: The packet_type structure which was used to register this handler | |
443 | * @orig_dev: The original net_device the the skb was received on. | |
444 | * (in case dev is a bond) | |
ab6b85c1 VD |
445 | * |
446 | * Returns: 0 for success | |
447 | */ | |
1875f27e | 448 | static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, |
ab6b85c1 VD |
449 | struct packet_type *ptype, |
450 | struct net_device *orig_dev) | |
451 | { | |
259ad85d | 452 | struct fcoe_interface *fcoe; |
ab6b85c1 | 453 | |
259ad85d | 454 | fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); |
3fe9a0ba | 455 | fcoe_ctlr_recv(&fcoe->ctlr, skb); |
ab6b85c1 VD |
456 | return 0; |
457 | } | |
458 | ||
459 | /** | |
1875f27e RL |
460 | * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame |
461 | * @fip: The FCoE controller | |
462 | * @skb: The FIP packet to be sent | |
ab6b85c1 VD |
463 | */ |
464 | static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
465 | { | |
3fe9a0ba | 466 | skb->dev = fcoe_from_ctlr(fip)->netdev; |
ab6b85c1 VD |
467 | dev_queue_xmit(skb); |
468 | } | |
469 | ||
470 | /** | |
1875f27e RL |
471 | * fcoe_update_src_mac() - Update the Ethernet MAC filters |
472 | * @lport: The local port to update the source MAC on | |
473 | * @addr: Unicast MAC address to add | |
ab6b85c1 VD |
474 | * |
475 | * Remove any previously-set unicast MAC filter. | |
476 | * Add secondary FCoE MAC address filter for our OUI. | |
477 | */ | |
11b56188 | 478 | static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) |
ab6b85c1 | 479 | { |
11b56188 CL |
480 | struct fcoe_port *port = lport_priv(lport); |
481 | struct fcoe_interface *fcoe = port->fcoe; | |
25024989 | 482 | |
ab6b85c1 | 483 | rtnl_lock(); |
11b56188 CL |
484 | if (!is_zero_ether_addr(port->data_src_addr)) |
485 | dev_unicast_delete(fcoe->netdev, port->data_src_addr); | |
486 | if (!is_zero_ether_addr(addr)) | |
487 | dev_unicast_add(fcoe->netdev, addr); | |
488 | memcpy(port->data_src_addr, addr, ETH_ALEN); | |
ab6b85c1 VD |
489 | rtnl_unlock(); |
490 | } | |
491 | ||
11b56188 CL |
492 | /** |
493 | * fcoe_get_src_mac() - return the Ethernet source address for an lport | |
494 | * @lport: libfc lport | |
495 | */ | |
496 | static u8 *fcoe_get_src_mac(struct fc_lport *lport) | |
497 | { | |
498 | struct fcoe_port *port = lport_priv(lport); | |
499 | ||
500 | return port->data_src_addr; | |
501 | } | |
502 | ||
7f349142 | 503 | /** |
1875f27e RL |
504 | * fcoe_lport_config() - Set up a local port |
505 | * @lport: The local port to be setup | |
7f349142 VD |
506 | * |
507 | * Returns: 0 for success | |
508 | */ | |
1875f27e | 509 | static int fcoe_lport_config(struct fc_lport *lport) |
7f349142 | 510 | { |
1875f27e RL |
511 | lport->link_up = 0; |
512 | lport->qfull = 0; | |
513 | lport->max_retry_count = 3; | |
514 | lport->max_rport_retry_count = 3; | |
515 | lport->e_d_tov = 2 * 1000; /* FC-FS default */ | |
516 | lport->r_a_tov = 2 * 2 * 1000; | |
517 | lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | | |
518 | FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); | |
519 | lport->does_npiv = 1; | |
520 | ||
521 | fc_lport_init_stats(lport); | |
7f349142 VD |
522 | |
523 | /* lport fc_lport related configuration */ | |
1875f27e | 524 | fc_lport_config(lport); |
7f349142 VD |
525 | |
526 | /* offload related configuration */ | |
1875f27e RL |
527 | lport->crc_offload = 0; |
528 | lport->seq_offload = 0; | |
529 | lport->lro_enabled = 0; | |
530 | lport->lro_xid = 0; | |
531 | lport->lso_max = 0; | |
7f349142 VD |
532 | |
533 | return 0; | |
534 | } | |
535 | ||
1047f221 | 536 | /** |
1875f27e RL |
537 | * fcoe_queue_timer() - The fcoe queue timer |
538 | * @lport: The local port | |
1047f221 VD |
539 | * |
540 | * Calls fcoe_check_wait_queue on timeout | |
1047f221 | 541 | */ |
1875f27e | 542 | static void fcoe_queue_timer(ulong lport) |
1047f221 | 543 | { |
1875f27e | 544 | fcoe_check_wait_queue((struct fc_lport *)lport, NULL); |
1047f221 VD |
545 | } |
546 | ||
7f349142 | 547 | /** |
1875f27e RL |
548 | * fcoe_netdev_config() - Set up net devive for SW FCoE |
549 | * @lport: The local port that is associated with the net device | |
550 | * @netdev: The associated net device | |
7f349142 | 551 | * |
1875f27e | 552 | * Must be called after fcoe_lport_config() as it will use local port mutex |
7f349142 | 553 | * |
1875f27e | 554 | * Returns: 0 for success |
7f349142 | 555 | */ |
1875f27e | 556 | static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) |
7f349142 VD |
557 | { |
558 | u32 mfs; | |
559 | u64 wwnn, wwpn; | |
25024989 | 560 | struct fcoe_interface *fcoe; |
014f5c3f | 561 | struct fcoe_port *port; |
cc0136c2 | 562 | int vid = 0; |
7f349142 VD |
563 | |
564 | /* Setup lport private data to point to fcoe softc */ | |
1875f27e | 565 | port = lport_priv(lport); |
25024989 | 566 | fcoe = port->fcoe; |
7f349142 VD |
567 | |
568 | /* | |
569 | * Determine max frame size based on underlying device and optional | |
570 | * user-configured limit. If the MFS is too low, fcoe_link_ok() | |
571 | * will return 0, so do this first. | |
572 | */ | |
7221d7e5 YZ |
573 | mfs = netdev->mtu; |
574 | if (netdev->features & NETIF_F_FCOE_MTU) { | |
575 | mfs = FCOE_MTU; | |
576 | FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); | |
577 | } | |
578 | mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); | |
1875f27e | 579 | if (fc_set_mfs(lport, mfs)) |
7f349142 VD |
580 | return -EINVAL; |
581 | ||
7f349142 | 582 | /* offload features support */ |
1d1b88dc | 583 | if (netdev->features & NETIF_F_SG) |
1875f27e | 584 | lport->sg_supp = 1; |
7f349142 | 585 | |
7f349142 | 586 | if (netdev->features & NETIF_F_FCOE_CRC) { |
1875f27e | 587 | lport->crc_offload = 1; |
d5488eb9 | 588 | FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); |
7f349142 | 589 | } |
7f349142 | 590 | if (netdev->features & NETIF_F_FSO) { |
1875f27e RL |
591 | lport->seq_offload = 1; |
592 | lport->lso_max = netdev->gso_max_size; | |
d5488eb9 | 593 | FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", |
1875f27e | 594 | lport->lso_max); |
7f349142 | 595 | } |
7f349142 | 596 | if (netdev->fcoe_ddp_xid) { |
1875f27e RL |
597 | lport->lro_enabled = 1; |
598 | lport->lro_xid = netdev->fcoe_ddp_xid; | |
d5488eb9 | 599 | FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", |
1875f27e | 600 | lport->lro_xid); |
7f349142 | 601 | } |
014f5c3f CL |
602 | skb_queue_head_init(&port->fcoe_pending_queue); |
603 | port->fcoe_pending_queue_active = 0; | |
1875f27e | 604 | setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport); |
7f349142 | 605 | |
1875f27e | 606 | if (!lport->vport) { |
cc0136c2 YZ |
607 | /* |
608 | * Use NAA 1&2 (FC-FS Rev. 2.0, Sec. 15) to generate WWNN/WWPN: | |
609 | * For WWNN, we use NAA 1 w/ bit 27-16 of word 0 as 0. | |
610 | * For WWPN, we use NAA 2 w/ bit 27-16 of word 0 from VLAN ID | |
611 | */ | |
612 | if (netdev->priv_flags & IFF_802_1Q_VLAN) | |
613 | vid = vlan_dev_vlan_id(netdev); | |
75ea89ef | 614 | wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0); |
1875f27e | 615 | fc_set_wwnn(lport, wwnn); |
cc0136c2 | 616 | wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 2, vid); |
1875f27e | 617 | fc_set_wwpn(lport, wwpn); |
9a05753b | 618 | } |
7f349142 | 619 | |
7f349142 VD |
620 | return 0; |
621 | } | |
622 | ||
623 | /** | |
1875f27e RL |
624 | * fcoe_shost_config() - Set up the SCSI host associated with a local port |
625 | * @lport: The local port | |
626 | * @shost: The SCSI host to associate with the local port | |
627 | * @dev: The device associated with the SCSI host | |
7f349142 VD |
628 | * |
629 | * Must be called after fcoe_lport_config() and fcoe_netdev_config() | |
630 | * | |
1875f27e | 631 | * Returns: 0 for success |
7f349142 | 632 | */ |
1875f27e RL |
633 | static int fcoe_shost_config(struct fc_lport *lport, struct Scsi_Host *shost, |
634 | struct device *dev) | |
7f349142 VD |
635 | { |
636 | int rc = 0; | |
637 | ||
638 | /* lport scsi host config */ | |
1875f27e RL |
639 | lport->host->max_lun = FCOE_MAX_LUN; |
640 | lport->host->max_id = FCOE_MAX_FCP_TARGET; | |
641 | lport->host->max_channel = 0; | |
642 | if (lport->vport) | |
643 | lport->host->transportt = fcoe_vport_transport_template; | |
e9084bb8 | 644 | else |
1875f27e | 645 | lport->host->transportt = fcoe_transport_template; |
7f349142 VD |
646 | |
647 | /* add the new host to the SCSI-ml */ | |
1875f27e | 648 | rc = scsi_add_host(lport->host, dev); |
7f349142 | 649 | if (rc) { |
1875f27e | 650 | FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " |
d5488eb9 | 651 | "error on scsi_add_host\n"); |
7f349142 VD |
652 | return rc; |
653 | } | |
9a05753b | 654 | |
1875f27e RL |
655 | if (!lport->vport) |
656 | fc_host_max_npiv_vports(lport->host) = USHORT_MAX; | |
9a05753b | 657 | |
1875f27e | 658 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, |
5baa17c3 | 659 | "%s v%s over %s", FCOE_NAME, FCOE_VERSION, |
1875f27e | 660 | fcoe_netdev(lport)->name); |
7f349142 VD |
661 | |
662 | return 0; | |
663 | } | |
664 | ||
1875f27e RL |
665 | /** |
666 | * fcoe_oem_match() - The match routine for the offloaded exchange manager | |
667 | * @fp: The I/O frame | |
d7179680 | 668 | * |
1875f27e RL |
669 | * This routine will be associated with an exchange manager (EM). When |
670 | * the libfc exchange handling code is looking for an EM to use it will | |
671 | * call this routine and pass it the frame that it wishes to send. This | |
672 | * routine will return True if the associated EM is to be used and False | |
673 | * if the echange code should continue looking for an EM. | |
674 | * | |
675 | * The offload EM that this routine is associated with will handle any | |
676 | * packets that are for SCSI read requests. | |
677 | * | |
678 | * Returns: True for read types I/O, otherwise returns false. | |
d7179680 VD |
679 | */ |
680 | bool fcoe_oem_match(struct fc_frame *fp) | |
681 | { | |
05cc7390 YZ |
682 | return fc_fcp_is_read(fr_fsp(fp)) && |
683 | (fr_fsp(fp)->data_len > fcoe_ddp_min); | |
d7179680 VD |
684 | } |
685 | ||
7f349142 | 686 | /** |
1875f27e RL |
687 | * fcoe_em_config() - Allocate and configure an exchange manager |
688 | * @lport: The local port that the new EM will be associated with | |
7f349142 | 689 | * |
1875f27e | 690 | * Returns: 0 on success |
7f349142 | 691 | */ |
1875f27e | 692 | static inline int fcoe_em_config(struct fc_lport *lport) |
7f349142 | 693 | { |
1875f27e | 694 | struct fcoe_port *port = lport_priv(lport); |
25024989 CL |
695 | struct fcoe_interface *fcoe = port->fcoe; |
696 | struct fcoe_interface *oldfcoe = NULL; | |
1d1b88dc | 697 | struct net_device *old_real_dev, *cur_real_dev; |
d7179680 VD |
698 | u16 min_xid = FCOE_MIN_XID; |
699 | u16 max_xid = FCOE_MAX_XID; | |
700 | ||
701 | /* | |
702 | * Check if need to allocate an em instance for | |
703 | * offload exchange ids to be shared across all VN_PORTs/lport. | |
704 | */ | |
1875f27e RL |
705 | if (!lport->lro_enabled || !lport->lro_xid || |
706 | (lport->lro_xid >= max_xid)) { | |
707 | lport->lro_xid = 0; | |
d7179680 VD |
708 | goto skip_oem; |
709 | } | |
710 | ||
711 | /* | |
712 | * Reuse existing offload em instance in case | |
1d1b88dc | 713 | * it is already allocated on real eth device |
d7179680 | 714 | */ |
25024989 CL |
715 | if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
716 | cur_real_dev = vlan_dev_real_dev(fcoe->netdev); | |
1d1b88dc | 717 | else |
25024989 | 718 | cur_real_dev = fcoe->netdev; |
1d1b88dc | 719 | |
25024989 | 720 | list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { |
25024989 CL |
721 | if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
722 | old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); | |
1d1b88dc | 723 | else |
25024989 | 724 | old_real_dev = oldfcoe->netdev; |
1d1b88dc VD |
725 | |
726 | if (cur_real_dev == old_real_dev) { | |
991cbb60 | 727 | fcoe->oem = oldfcoe->oem; |
d7179680 VD |
728 | break; |
729 | } | |
730 | } | |
731 | ||
991cbb60 | 732 | if (fcoe->oem) { |
1875f27e | 733 | if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { |
d7179680 VD |
734 | printk(KERN_ERR "fcoe_em_config: failed to add " |
735 | "offload em:%p on interface:%s\n", | |
991cbb60 | 736 | fcoe->oem, fcoe->netdev->name); |
d7179680 VD |
737 | return -ENOMEM; |
738 | } | |
739 | } else { | |
1875f27e RL |
740 | fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, |
741 | FCOE_MIN_XID, lport->lro_xid, | |
742 | fcoe_oem_match); | |
991cbb60 | 743 | if (!fcoe->oem) { |
d7179680 VD |
744 | printk(KERN_ERR "fcoe_em_config: failed to allocate " |
745 | "em for offload exches on interface:%s\n", | |
25024989 | 746 | fcoe->netdev->name); |
d7179680 VD |
747 | return -ENOMEM; |
748 | } | |
749 | } | |
750 | ||
751 | /* | |
752 | * Exclude offload EM xid range from next EM xid range. | |
753 | */ | |
1875f27e | 754 | min_xid += lport->lro_xid + 1; |
d7179680 VD |
755 | |
756 | skip_oem: | |
1875f27e | 757 | if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { |
d7179680 | 758 | printk(KERN_ERR "fcoe_em_config: failed to " |
25024989 | 759 | "allocate em on interface %s\n", fcoe->netdev->name); |
7f349142 | 760 | return -ENOMEM; |
d7179680 | 761 | } |
7f349142 VD |
762 | |
763 | return 0; | |
764 | } | |
765 | ||
766 | /** | |
1875f27e RL |
767 | * fcoe_if_destroy() - Tear down a SW FCoE instance |
768 | * @lport: The local port to be destroyed | |
7f349142 | 769 | */ |
af7f85d9 | 770 | static void fcoe_if_destroy(struct fc_lport *lport) |
7f349142 | 771 | { |
014f5c3f CL |
772 | struct fcoe_port *port = lport_priv(lport); |
773 | struct fcoe_interface *fcoe = port->fcoe; | |
25024989 | 774 | struct net_device *netdev = fcoe->netdev; |
7f349142 | 775 | |
d5488eb9 | 776 | FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); |
7f349142 | 777 | |
7f349142 | 778 | /* Logout of the fabric */ |
af7f85d9 | 779 | fc_fabric_logoff(lport); |
7f349142 | 780 | |
54b649f8 CL |
781 | /* Cleanup the fc_lport */ |
782 | fc_lport_destroy(lport); | |
783 | fc_fcp_destroy(lport); | |
784 | ||
785 | /* Stop the transmit retry timer */ | |
786 | del_timer_sync(&port->timer); | |
ab6b85c1 | 787 | |
54b649f8 CL |
788 | /* Free existing transmit skbs */ |
789 | fcoe_clean_pending_queue(lport); | |
790 | ||
11b56188 CL |
791 | rtnl_lock(); |
792 | if (!is_zero_ether_addr(port->data_src_addr)) | |
793 | dev_unicast_delete(netdev, port->data_src_addr); | |
794 | rtnl_unlock(); | |
795 | ||
54b649f8 CL |
796 | /* receives may not be stopped until after this */ |
797 | fcoe_interface_put(fcoe); | |
7f349142 | 798 | |
f161fb72 | 799 | /* Free queued packets for the per-CPU receive threads */ |
af7f85d9 | 800 | fcoe_percpu_clean(lport); |
f161fb72 | 801 | |
7f349142 | 802 | /* Detach from the scsi-ml */ |
af7f85d9 CL |
803 | fc_remove_host(lport->host); |
804 | scsi_remove_host(lport->host); | |
7f349142 VD |
805 | |
806 | /* There are no more rports or I/O, free the EM */ | |
af7f85d9 | 807 | fc_exch_mgr_free(lport); |
7f349142 | 808 | |
7f349142 | 809 | /* Free memory used by statistical counters */ |
af7f85d9 | 810 | fc_lport_free_stats(lport); |
7f349142 | 811 | |
2e70e241 | 812 | /* Release the Scsi_Host */ |
af7f85d9 | 813 | scsi_host_put(lport->host); |
7f349142 VD |
814 | } |
815 | ||
1875f27e RL |
816 | /** |
817 | * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device | |
818 | * @lport: The local port to setup DDP for | |
819 | * @xid: The exchange ID for this DDP transfer | |
820 | * @sgl: The scatterlist describing this transfer | |
821 | * @sgc: The number of sg items | |
7f349142 | 822 | * |
1875f27e | 823 | * Returns: 0 if the DDP context was not configured |
7f349142 | 824 | */ |
1875f27e RL |
825 | static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, |
826 | struct scatterlist *sgl, unsigned int sgc) | |
7f349142 | 827 | { |
1875f27e | 828 | struct net_device *netdev = fcoe_netdev(lport); |
7f349142 | 829 | |
1875f27e RL |
830 | if (netdev->netdev_ops->ndo_fcoe_ddp_setup) |
831 | return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, | |
832 | xid, sgl, | |
833 | sgc); | |
7f349142 VD |
834 | |
835 | return 0; | |
836 | } | |
837 | ||
1875f27e RL |
838 | /** |
839 | * fcoe_ddp_done() - Call a LLD's ddp_done through the net device | |
840 | * @lport: The local port to complete DDP on | |
841 | * @xid: The exchange ID for this DDP transfer | |
7f349142 | 842 | * |
1875f27e | 843 | * Returns: the length of data that have been completed by DDP |
7f349142 | 844 | */ |
1875f27e | 845 | static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) |
7f349142 | 846 | { |
1875f27e | 847 | struct net_device *netdev = fcoe_netdev(lport); |
7f349142 | 848 | |
1875f27e RL |
849 | if (netdev->netdev_ops->ndo_fcoe_ddp_done) |
850 | return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); | |
7f349142 VD |
851 | return 0; |
852 | } | |
853 | ||
7f349142 | 854 | /** |
1875f27e RL |
855 | * fcoe_if_create() - Create a FCoE instance on an interface |
856 | * @fcoe: The FCoE interface to create a local port on | |
857 | * @parent: The device pointer to be the parent in sysfs for the SCSI host | |
858 | * @npiv: Indicates if the port is a vport or not | |
7f349142 | 859 | * |
1875f27e | 860 | * Creates a fc_lport instance and a Scsi_Host instance and configure them. |
7f349142 | 861 | * |
1875f27e | 862 | * Returns: The allocated fc_lport or an error pointer |
7f349142 | 863 | */ |
030f4e00 | 864 | static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, |
9a05753b | 865 | struct device *parent, int npiv) |
7f349142 | 866 | { |
1875f27e | 867 | struct net_device *netdev = fcoe->netdev; |
af7f85d9 | 868 | struct fc_lport *lport = NULL; |
014f5c3f | 869 | struct fcoe_port *port; |
7f349142 | 870 | struct Scsi_Host *shost; |
1875f27e | 871 | int rc; |
9a05753b CL |
872 | /* |
873 | * parent is only a vport if npiv is 1, | |
874 | * but we'll only use vport in that case so go ahead and set it | |
875 | */ | |
876 | struct fc_vport *vport = dev_to_vport(parent); | |
7f349142 | 877 | |
d5488eb9 | 878 | FCOE_NETDEV_DBG(netdev, "Create Interface\n"); |
7f349142 | 879 | |
9a05753b CL |
880 | if (!npiv) { |
881 | lport = libfc_host_alloc(&fcoe_shost_template, | |
882 | sizeof(struct fcoe_port)); | |
883 | } else { | |
884 | lport = libfc_vport_create(vport, | |
885 | sizeof(struct fcoe_port)); | |
886 | } | |
86221969 | 887 | if (!lport) { |
d5488eb9 | 888 | FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); |
af7f85d9 | 889 | rc = -ENOMEM; |
030f4e00 | 890 | goto out; |
7f349142 | 891 | } |
86221969 | 892 | shost = lport->host; |
014f5c3f | 893 | port = lport_priv(lport); |
2e70e241 | 894 | port->lport = lport; |
014f5c3f | 895 | port->fcoe = fcoe; |
2e70e241 | 896 | INIT_WORK(&port->destroy_work, fcoe_destroy_work); |
7f349142 | 897 | |
1875f27e | 898 | /* configure a fc_lport including the exchange manager */ |
af7f85d9 | 899 | rc = fcoe_lport_config(lport); |
7f349142 | 900 | if (rc) { |
d5488eb9 RL |
901 | FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " |
902 | "interface\n"); | |
7f349142 VD |
903 | goto out_host_put; |
904 | } | |
905 | ||
9a05753b CL |
906 | if (npiv) { |
907 | FCOE_NETDEV_DBG(netdev, "Setting vport names, 0x%llX 0x%llX\n", | |
1875f27e | 908 | vport->node_name, vport->port_name); |
9a05753b CL |
909 | fc_set_wwnn(lport, vport->node_name); |
910 | fc_set_wwpn(lport, vport->port_name); | |
911 | } | |
912 | ||
ab6b85c1 | 913 | /* configure lport network properties */ |
af7f85d9 | 914 | rc = fcoe_netdev_config(lport, netdev); |
ab6b85c1 | 915 | if (rc) { |
d5488eb9 RL |
916 | FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " |
917 | "interface\n"); | |
54b649f8 | 918 | goto out_lp_destroy; |
ab6b85c1 | 919 | } |
97c8389d | 920 | |
7f349142 | 921 | /* configure lport scsi host properties */ |
af7f85d9 | 922 | rc = fcoe_shost_config(lport, shost, parent); |
7f349142 | 923 | if (rc) { |
d5488eb9 RL |
924 | FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " |
925 | "interface\n"); | |
54b649f8 | 926 | goto out_lp_destroy; |
7f349142 VD |
927 | } |
928 | ||
96316099 | 929 | /* Initialize the library */ |
af7f85d9 | 930 | rc = fcoe_libfc_config(lport, &fcoe_libfc_fcn_templ); |
7f349142 | 931 | if (rc) { |
96316099 | 932 | FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " |
d5488eb9 | 933 | "interface\n"); |
96316099 | 934 | goto out_lp_destroy; |
7f349142 VD |
935 | } |
936 | ||
9a05753b CL |
937 | if (!npiv) { |
938 | /* | |
939 | * fcoe_em_alloc() and fcoe_hostlist_add() both | |
940 | * need to be atomic with respect to other changes to the | |
941 | * hostlist since fcoe_em_alloc() looks for an existing EM | |
942 | * instance on host list updated by fcoe_hostlist_add(). | |
943 | * | |
944 | * This is currently handled through the fcoe_config_mutex | |
945 | * begin held. | |
946 | */ | |
c863df33 | 947 | |
9a05753b CL |
948 | /* lport exch manager allocation */ |
949 | rc = fcoe_em_config(lport); | |
950 | if (rc) { | |
951 | FCOE_NETDEV_DBG(netdev, "Could not configure the EM " | |
1875f27e | 952 | "for the interface\n"); |
9a05753b CL |
953 | goto out_lp_destroy; |
954 | } | |
7f349142 VD |
955 | } |
956 | ||
030f4e00 | 957 | fcoe_interface_get(fcoe); |
af7f85d9 | 958 | return lport; |
7f349142 VD |
959 | |
960 | out_lp_destroy: | |
af7f85d9 | 961 | fc_exch_mgr_free(lport); |
7f349142 | 962 | out_host_put: |
af7f85d9 CL |
963 | scsi_host_put(lport->host); |
964 | out: | |
965 | return ERR_PTR(rc); | |
7f349142 VD |
966 | } |
967 | ||
968 | /** | |
1875f27e | 969 | * fcoe_if_init() - Initialization routine for fcoe.ko |
7f349142 | 970 | * |
1875f27e RL |
971 | * Attaches the SW FCoE transport to the FC transport |
972 | * | |
973 | * Returns: 0 on success | |
7f349142 VD |
974 | */ |
975 | static int __init fcoe_if_init(void) | |
976 | { | |
977 | /* attach to scsi transport */ | |
e9084bb8 CL |
978 | fcoe_transport_template = fc_attach_transport(&fcoe_transport_function); |
979 | fcoe_vport_transport_template = | |
980 | fc_attach_transport(&fcoe_vport_transport_function); | |
7f349142 | 981 | |
e9084bb8 | 982 | if (!fcoe_transport_template) { |
d5488eb9 | 983 | printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); |
7f349142 VD |
984 | return -ENODEV; |
985 | } | |
986 | ||
987 | return 0; | |
988 | } | |
989 | ||
990 | /** | |
1875f27e RL |
991 | * fcoe_if_exit() - Tear down fcoe.ko |
992 | * | |
993 | * Detaches the SW FCoE transport from the FC transport | |
7f349142 | 994 | * |
1875f27e | 995 | * Returns: 0 on success |
7f349142 VD |
996 | */ |
997 | int __exit fcoe_if_exit(void) | |
998 | { | |
e9084bb8 CL |
999 | fc_release_transport(fcoe_transport_template); |
1000 | fc_release_transport(fcoe_vport_transport_template); | |
1001 | fcoe_transport_template = NULL; | |
1002 | fcoe_vport_transport_template = NULL; | |
7f349142 VD |
1003 | return 0; |
1004 | } | |
1005 | ||
8976f424 | 1006 | /** |
1875f27e RL |
1007 | * fcoe_percpu_thread_create() - Create a receive thread for an online CPU |
1008 | * @cpu: The CPU index of the CPU to create a receive thread for | |
8976f424 RL |
1009 | */ |
1010 | static void fcoe_percpu_thread_create(unsigned int cpu) | |
1011 | { | |
1012 | struct fcoe_percpu_s *p; | |
1013 | struct task_struct *thread; | |
1014 | ||
1015 | p = &per_cpu(fcoe_percpu, cpu); | |
1016 | ||
1017 | thread = kthread_create(fcoe_percpu_receive_thread, | |
1018 | (void *)p, "fcoethread/%d", cpu); | |
1019 | ||
e7a51997 | 1020 | if (likely(!IS_ERR(thread))) { |
8976f424 RL |
1021 | kthread_bind(thread, cpu); |
1022 | wake_up_process(thread); | |
1023 | ||
1024 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1025 | p->thread = thread; | |
1026 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1027 | } | |
1028 | } | |
1029 | ||
1030 | /** | |
1875f27e RL |
1031 | * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU |
1032 | * @cpu: The CPU index of the CPU whose receive thread is to be destroyed | |
8976f424 RL |
1033 | * |
1034 | * Destroys a per-CPU Rx thread. Any pending skbs are moved to the | |
1035 | * current CPU's Rx thread. If the thread being destroyed is bound to | |
1036 | * the CPU processing this context the skbs will be freed. | |
1037 | */ | |
1038 | static void fcoe_percpu_thread_destroy(unsigned int cpu) | |
1039 | { | |
1040 | struct fcoe_percpu_s *p; | |
1041 | struct task_struct *thread; | |
1042 | struct page *crc_eof; | |
1043 | struct sk_buff *skb; | |
1044 | #ifdef CONFIG_SMP | |
1045 | struct fcoe_percpu_s *p0; | |
1046 | unsigned targ_cpu = smp_processor_id(); | |
1047 | #endif /* CONFIG_SMP */ | |
1048 | ||
d5488eb9 | 1049 | FCOE_DBG("Destroying receive thread for CPU %d\n", cpu); |
8976f424 RL |
1050 | |
1051 | /* Prevent any new skbs from being queued for this CPU. */ | |
1052 | p = &per_cpu(fcoe_percpu, cpu); | |
1053 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1054 | thread = p->thread; | |
1055 | p->thread = NULL; | |
1056 | crc_eof = p->crc_eof_page; | |
1057 | p->crc_eof_page = NULL; | |
1058 | p->crc_eof_offset = 0; | |
1059 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1060 | ||
1061 | #ifdef CONFIG_SMP | |
1062 | /* | |
1063 | * Don't bother moving the skb's if this context is running | |
1064 | * on the same CPU that is having its thread destroyed. This | |
1065 | * can easily happen when the module is removed. | |
1066 | */ | |
1067 | if (cpu != targ_cpu) { | |
1068 | p0 = &per_cpu(fcoe_percpu, targ_cpu); | |
1069 | spin_lock_bh(&p0->fcoe_rx_list.lock); | |
1070 | if (p0->thread) { | |
d5488eb9 RL |
1071 | FCOE_DBG("Moving frames from CPU %d to CPU %d\n", |
1072 | cpu, targ_cpu); | |
8976f424 RL |
1073 | |
1074 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1075 | __skb_queue_tail(&p0->fcoe_rx_list, skb); | |
1076 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
1077 | } else { | |
1078 | /* | |
1079 | * The targeted CPU is not initialized and cannot accept | |
1875f27e | 1080 | * new skbs. Unlock the targeted CPU and drop the skbs |
8976f424 RL |
1081 | * on the CPU that is going offline. |
1082 | */ | |
1083 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1084 | kfree_skb(skb); | |
1085 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
1086 | } | |
1087 | } else { | |
1088 | /* | |
1089 | * This scenario occurs when the module is being removed | |
1090 | * and all threads are being destroyed. skbs will continue | |
1091 | * to be shifted from the CPU thread that is being removed | |
1092 | * to the CPU thread associated with the CPU that is processing | |
1093 | * the module removal. Once there is only one CPU Rx thread it | |
1094 | * will reach this case and we will drop all skbs and later | |
1095 | * stop the thread. | |
1096 | */ | |
1097 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1098 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1099 | kfree_skb(skb); | |
1100 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1101 | } | |
1102 | #else | |
1103 | /* | |
dd3fd72e | 1104 | * This a non-SMP scenario where the singular Rx thread is |
8976f424 RL |
1105 | * being removed. Free all skbs and stop the thread. |
1106 | */ | |
1107 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1108 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1109 | kfree_skb(skb); | |
1110 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1111 | #endif | |
1112 | ||
1113 | if (thread) | |
1114 | kthread_stop(thread); | |
1115 | ||
1116 | if (crc_eof) | |
1117 | put_page(crc_eof); | |
1118 | } | |
1119 | ||
1120 | /** | |
1875f27e RL |
1121 | * fcoe_cpu_callback() - Handler for CPU hotplug events |
1122 | * @nfb: The callback data block | |
1123 | * @action: The event triggering the callback | |
1124 | * @hcpu: The index of the CPU that the event is for | |
8976f424 | 1125 | * |
1875f27e | 1126 | * This creates or destroys per-CPU data for fcoe |
8976f424 RL |
1127 | * |
1128 | * Returns NOTIFY_OK always. | |
1129 | */ | |
1130 | static int fcoe_cpu_callback(struct notifier_block *nfb, | |
1131 | unsigned long action, void *hcpu) | |
1132 | { | |
1133 | unsigned cpu = (unsigned long)hcpu; | |
1134 | ||
1135 | switch (action) { | |
1136 | case CPU_ONLINE: | |
1137 | case CPU_ONLINE_FROZEN: | |
d5488eb9 | 1138 | FCOE_DBG("CPU %x online: Create Rx thread\n", cpu); |
8976f424 RL |
1139 | fcoe_percpu_thread_create(cpu); |
1140 | break; | |
1141 | case CPU_DEAD: | |
1142 | case CPU_DEAD_FROZEN: | |
d5488eb9 | 1143 | FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu); |
8976f424 RL |
1144 | fcoe_percpu_thread_destroy(cpu); |
1145 | break; | |
1146 | default: | |
1147 | break; | |
1148 | } | |
1149 | return NOTIFY_OK; | |
1150 | } | |
1151 | ||
85b4aa49 | 1152 | /** |
1875f27e RL |
1153 | * fcoe_rcv() - Receive packets from a net device |
1154 | * @skb: The received packet | |
1155 | * @netdev: The net device that the packet was received on | |
1156 | * @ptype: The packet type context | |
1157 | * @olddev: The last device net device | |
85b4aa49 | 1158 | * |
1875f27e RL |
1159 | * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a |
1160 | * FC frame and passes the frame to libfc. | |
85b4aa49 RL |
1161 | * |
1162 | * Returns: 0 for success | |
34f42a07 | 1163 | */ |
1875f27e | 1164 | int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, |
85b4aa49 RL |
1165 | struct packet_type *ptype, struct net_device *olddev) |
1166 | { | |
1875f27e | 1167 | struct fc_lport *lport; |
85b4aa49 | 1168 | struct fcoe_rcv_info *fr; |
259ad85d | 1169 | struct fcoe_interface *fcoe; |
85b4aa49 | 1170 | struct fc_frame_header *fh; |
85b4aa49 | 1171 | struct fcoe_percpu_s *fps; |
b2f0091f | 1172 | unsigned int cpu; |
85b4aa49 | 1173 | |
259ad85d | 1174 | fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); |
1875f27e RL |
1175 | lport = fcoe->ctlr.lp; |
1176 | if (unlikely(!lport)) { | |
1177 | FCOE_NETDEV_DBG(netdev, "Cannot find hba structure"); | |
85b4aa49 RL |
1178 | goto err2; |
1179 | } | |
1875f27e | 1180 | if (!lport->link_up) |
97c8389d | 1181 | goto err2; |
85b4aa49 | 1182 | |
1875f27e | 1183 | FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p " |
d5488eb9 RL |
1184 | "data:%p tail:%p end:%p sum:%d dev:%s", |
1185 | skb->len, skb->data_len, skb->head, skb->data, | |
1186 | skb_tail_pointer(skb), skb_end_pointer(skb), | |
1187 | skb->csum, skb->dev ? skb->dev->name : "<NULL>"); | |
85b4aa49 RL |
1188 | |
1189 | /* check for FCOE packet type */ | |
1190 | if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) { | |
1875f27e | 1191 | FCOE_NETDEV_DBG(netdev, "Wrong FC type frame"); |
85b4aa49 RL |
1192 | goto err; |
1193 | } | |
1194 | ||
1195 | /* | |
1196 | * Check for minimum frame length, and make sure required FCoE | |
1197 | * and FC headers are pulled into the linear data area. | |
1198 | */ | |
1199 | if (unlikely((skb->len < FCOE_MIN_FRAME) || | |
1875f27e | 1200 | !pskb_may_pull(skb, FCOE_HEADER_LEN))) |
85b4aa49 RL |
1201 | goto err; |
1202 | ||
1203 | skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); | |
1204 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1205 | ||
85b4aa49 | 1206 | fr = fcoe_dev_from_skb(skb); |
1875f27e | 1207 | fr->fr_dev = lport; |
85b4aa49 | 1208 | fr->ptype = ptype; |
5e5e92df | 1209 | |
85b4aa49 | 1210 | /* |
b2f0091f VD |
1211 | * In case the incoming frame's exchange is originated from |
1212 | * the initiator, then received frame's exchange id is ANDed | |
1213 | * with fc_cpu_mask bits to get the same cpu on which exchange | |
1214 | * was originated, otherwise just use the current cpu. | |
85b4aa49 | 1215 | */ |
b2f0091f VD |
1216 | if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) |
1217 | cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; | |
1218 | else | |
1219 | cpu = smp_processor_id(); | |
5e5e92df | 1220 | |
8976f424 | 1221 | fps = &per_cpu(fcoe_percpu, cpu); |
85b4aa49 | 1222 | spin_lock_bh(&fps->fcoe_rx_list.lock); |
8976f424 RL |
1223 | if (unlikely(!fps->thread)) { |
1224 | /* | |
1225 | * The targeted CPU is not ready, let's target | |
1226 | * the first CPU now. For non-SMP systems this | |
1227 | * will check the same CPU twice. | |
1228 | */ | |
1875f27e | 1229 | FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread " |
d5488eb9 RL |
1230 | "ready for incoming skb- using first online " |
1231 | "CPU.\n"); | |
8976f424 RL |
1232 | |
1233 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1234 | cpu = first_cpu(cpu_online_map); | |
1235 | fps = &per_cpu(fcoe_percpu, cpu); | |
1236 | spin_lock_bh(&fps->fcoe_rx_list.lock); | |
1237 | if (!fps->thread) { | |
1238 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1239 | goto err; | |
1240 | } | |
1241 | } | |
1242 | ||
1243 | /* | |
1244 | * We now have a valid CPU that we're targeting for | |
1245 | * this skb. We also have this receive thread locked, | |
1246 | * so we're free to queue skbs into it's queue. | |
1247 | */ | |
85b4aa49 | 1248 | |
859b7b64 CL |
1249 | /* If this is a SCSI-FCP frame, and this is already executing on the |
1250 | * correct CPU, and the queue for this CPU is empty, then go ahead | |
1251 | * and process the frame directly in the softirq context. | |
1252 | * This lets us process completions without context switching from the | |
1253 | * NET_RX softirq, to our receive processing thread, and then back to | |
1254 | * BLOCK softirq context. | |
1255 | */ | |
1256 | if (fh->fh_type == FC_TYPE_FCP && | |
1257 | cpu == smp_processor_id() && | |
1258 | skb_queue_empty(&fps->fcoe_rx_list)) { | |
1259 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1260 | fcoe_recv_frame(skb); | |
1261 | } else { | |
1262 | __skb_queue_tail(&fps->fcoe_rx_list, skb); | |
1263 | if (fps->fcoe_rx_list.qlen == 1) | |
1264 | wake_up_process(fps->thread); | |
1265 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1266 | } | |
85b4aa49 RL |
1267 | |
1268 | return 0; | |
1269 | err: | |
1875f27e | 1270 | fc_lport_get_stats(lport)->ErrorFrames++; |
85b4aa49 RL |
1271 | |
1272 | err2: | |
1273 | kfree_skb(skb); | |
1274 | return -1; | |
1275 | } | |
85b4aa49 RL |
1276 | |
1277 | /** | |
1875f27e RL |
1278 | * fcoe_start_io() - Start FCoE I/O |
1279 | * @skb: The packet to be transmitted | |
1280 | * | |
1281 | * This routine is called from the net device to start transmitting | |
1282 | * FCoE packets. | |
85b4aa49 RL |
1283 | * |
1284 | * Returns: 0 for success | |
34f42a07 | 1285 | */ |
85b4aa49 RL |
1286 | static inline int fcoe_start_io(struct sk_buff *skb) |
1287 | { | |
18fa11ef | 1288 | struct sk_buff *nskb; |
85b4aa49 RL |
1289 | int rc; |
1290 | ||
18fa11ef CL |
1291 | nskb = skb_clone(skb, GFP_ATOMIC); |
1292 | rc = dev_queue_xmit(nskb); | |
85b4aa49 RL |
1293 | if (rc != 0) |
1294 | return rc; | |
1295 | kfree_skb(skb); | |
1296 | return 0; | |
1297 | } | |
1298 | ||
1299 | /** | |
1875f27e RL |
1300 | * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC |
1301 | * @skb: The packet to be transmitted | |
1302 | * @tlen: The total length of the trailer | |
1303 | * | |
1304 | * This routine allocates a page for frame trailers. The page is re-used if | |
1305 | * there is enough room left on it for the current trailer. If there isn't | |
1306 | * enough buffer left a new page is allocated for the trailer. Reference to | |
1307 | * the page from this function as well as the skbs using the page fragments | |
1308 | * ensure that the page is freed at the appropriate time. | |
85b4aa49 RL |
1309 | * |
1310 | * Returns: 0 for success | |
34f42a07 | 1311 | */ |
85b4aa49 RL |
1312 | static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen) |
1313 | { | |
1314 | struct fcoe_percpu_s *fps; | |
1315 | struct page *page; | |
85b4aa49 | 1316 | |
5e5e92df | 1317 | fps = &get_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1318 | page = fps->crc_eof_page; |
1319 | if (!page) { | |
1320 | page = alloc_page(GFP_ATOMIC); | |
1321 | if (!page) { | |
5e5e92df | 1322 | put_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1323 | return -ENOMEM; |
1324 | } | |
1325 | fps->crc_eof_page = page; | |
8976f424 | 1326 | fps->crc_eof_offset = 0; |
85b4aa49 RL |
1327 | } |
1328 | ||
1329 | get_page(page); | |
1330 | skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page, | |
1331 | fps->crc_eof_offset, tlen); | |
1332 | skb->len += tlen; | |
1333 | skb->data_len += tlen; | |
1334 | skb->truesize += tlen; | |
1335 | fps->crc_eof_offset += sizeof(struct fcoe_crc_eof); | |
1336 | ||
1337 | if (fps->crc_eof_offset >= PAGE_SIZE) { | |
1338 | fps->crc_eof_page = NULL; | |
1339 | fps->crc_eof_offset = 0; | |
1340 | put_page(page); | |
1341 | } | |
5e5e92df | 1342 | put_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1343 | return 0; |
1344 | } | |
1345 | ||
1346 | /** | |
1875f27e RL |
1347 | * fcoe_fc_crc() - Calculates the CRC for a given frame |
1348 | * @fp: The frame to be checksumed | |
85b4aa49 | 1349 | * |
1875f27e RL |
1350 | * This uses crc32() routine to calculate the CRC for a frame |
1351 | * | |
1352 | * Return: The 32 bit CRC value | |
34f42a07 | 1353 | */ |
85b4aa49 RL |
1354 | u32 fcoe_fc_crc(struct fc_frame *fp) |
1355 | { | |
1356 | struct sk_buff *skb = fp_skb(fp); | |
1357 | struct skb_frag_struct *frag; | |
1358 | unsigned char *data; | |
1359 | unsigned long off, len, clen; | |
1360 | u32 crc; | |
1361 | unsigned i; | |
1362 | ||
1363 | crc = crc32(~0, skb->data, skb_headlen(skb)); | |
1364 | ||
1365 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1366 | frag = &skb_shinfo(skb)->frags[i]; | |
1367 | off = frag->page_offset; | |
1368 | len = frag->size; | |
1369 | while (len > 0) { | |
1370 | clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK)); | |
1371 | data = kmap_atomic(frag->page + (off >> PAGE_SHIFT), | |
1372 | KM_SKB_DATA_SOFTIRQ); | |
1373 | crc = crc32(crc, data + (off & ~PAGE_MASK), clen); | |
1374 | kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ); | |
1375 | off += clen; | |
1376 | len -= clen; | |
1377 | } | |
1378 | } | |
1379 | return crc; | |
1380 | } | |
85b4aa49 RL |
1381 | |
1382 | /** | |
1875f27e RL |
1383 | * fcoe_xmit() - Transmit a FCoE frame |
1384 | * @lport: The local port that the frame is to be transmitted for | |
1385 | * @fp: The frame to be transmitted | |
85b4aa49 | 1386 | * |
1875f27e | 1387 | * Return: 0 for success |
34f42a07 | 1388 | */ |
1875f27e | 1389 | int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) |
85b4aa49 | 1390 | { |
4bb6b515 | 1391 | int wlen; |
85b4aa49 RL |
1392 | u32 crc; |
1393 | struct ethhdr *eh; | |
1394 | struct fcoe_crc_eof *cp; | |
1395 | struct sk_buff *skb; | |
1396 | struct fcoe_dev_stats *stats; | |
1397 | struct fc_frame_header *fh; | |
1398 | unsigned int hlen; /* header length implies the version */ | |
1399 | unsigned int tlen; /* trailer length */ | |
1400 | unsigned int elen; /* eth header, may include vlan */ | |
1875f27e | 1401 | struct fcoe_port *port = lport_priv(lport); |
3fe9a0ba | 1402 | struct fcoe_interface *fcoe = port->fcoe; |
85b4aa49 RL |
1403 | u8 sof, eof; |
1404 | struct fcoe_hdr *hp; | |
1405 | ||
1406 | WARN_ON((fr_len(fp) % sizeof(u32)) != 0); | |
1407 | ||
85b4aa49 | 1408 | fh = fc_frame_header_get(fp); |
97c8389d JE |
1409 | skb = fp_skb(fp); |
1410 | wlen = skb->len / FCOE_WORD_TO_BYTE; | |
1411 | ||
1875f27e | 1412 | if (!lport->link_up) { |
3caf02ee | 1413 | kfree_skb(skb); |
97c8389d | 1414 | return 0; |
85b4aa49 RL |
1415 | } |
1416 | ||
97c8389d | 1417 | if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) && |
1875f27e | 1418 | fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb)) |
97c8389d JE |
1419 | return 0; |
1420 | ||
85b4aa49 RL |
1421 | sof = fr_sof(fp); |
1422 | eof = fr_eof(fp); | |
1423 | ||
4e57e1cb | 1424 | elen = sizeof(struct ethhdr); |
85b4aa49 RL |
1425 | hlen = sizeof(struct fcoe_hdr); |
1426 | tlen = sizeof(struct fcoe_crc_eof); | |
1427 | wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; | |
1428 | ||
1429 | /* crc offload */ | |
1875f27e | 1430 | if (likely(lport->crc_offload)) { |
39ca9a06 | 1431 | skb->ip_summed = CHECKSUM_PARTIAL; |
85b4aa49 RL |
1432 | skb->csum_start = skb_headroom(skb); |
1433 | skb->csum_offset = skb->len; | |
1434 | crc = 0; | |
1435 | } else { | |
1436 | skb->ip_summed = CHECKSUM_NONE; | |
1437 | crc = fcoe_fc_crc(fp); | |
1438 | } | |
1439 | ||
014f5c3f | 1440 | /* copy port crc and eof to the skb buff */ |
85b4aa49 RL |
1441 | if (skb_is_nonlinear(skb)) { |
1442 | skb_frag_t *frag; | |
1443 | if (fcoe_get_paged_crc_eof(skb, tlen)) { | |
e9041581 | 1444 | kfree_skb(skb); |
85b4aa49 RL |
1445 | return -ENOMEM; |
1446 | } | |
1447 | frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; | |
1448 | cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ) | |
1449 | + frag->page_offset; | |
1450 | } else { | |
1451 | cp = (struct fcoe_crc_eof *)skb_put(skb, tlen); | |
1452 | } | |
1453 | ||
1454 | memset(cp, 0, sizeof(*cp)); | |
1455 | cp->fcoe_eof = eof; | |
1456 | cp->fcoe_crc32 = cpu_to_le32(~crc); | |
1457 | ||
1458 | if (skb_is_nonlinear(skb)) { | |
1459 | kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ); | |
1460 | cp = NULL; | |
1461 | } | |
1462 | ||
014f5c3f | 1463 | /* adjust skb network/transport offsets to match mac/fcoe/port */ |
85b4aa49 RL |
1464 | skb_push(skb, elen + hlen); |
1465 | skb_reset_mac_header(skb); | |
1466 | skb_reset_network_header(skb); | |
1467 | skb->mac_len = elen; | |
211c738d | 1468 | skb->protocol = htons(ETH_P_FCOE); |
3fe9a0ba | 1469 | skb->dev = fcoe->netdev; |
85b4aa49 RL |
1470 | |
1471 | /* fill up mac and fcoe headers */ | |
1472 | eh = eth_hdr(skb); | |
1473 | eh->h_proto = htons(ETH_P_FCOE); | |
3fe9a0ba | 1474 | if (fcoe->ctlr.map_dest) |
85b4aa49 RL |
1475 | fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id); |
1476 | else | |
1477 | /* insert GW address */ | |
3fe9a0ba | 1478 | memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN); |
85b4aa49 | 1479 | |
3fe9a0ba CL |
1480 | if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN)) |
1481 | memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN); | |
85b4aa49 | 1482 | else |
11b56188 | 1483 | memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); |
85b4aa49 RL |
1484 | |
1485 | hp = (struct fcoe_hdr *)(eh + 1); | |
1486 | memset(hp, 0, sizeof(*hp)); | |
1487 | if (FC_FCOE_VER) | |
1488 | FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); | |
1489 | hp->fcoe_sof = sof; | |
1490 | ||
39ca9a06 | 1491 | /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ |
1875f27e | 1492 | if (lport->seq_offload && fr_max_payload(fp)) { |
39ca9a06 YZ |
1493 | skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; |
1494 | skb_shinfo(skb)->gso_size = fr_max_payload(fp); | |
1495 | } else { | |
1496 | skb_shinfo(skb)->gso_type = 0; | |
1497 | skb_shinfo(skb)->gso_size = 0; | |
1498 | } | |
85b4aa49 | 1499 | /* update tx stats: regardless if LLD fails */ |
1875f27e | 1500 | stats = fc_lport_get_stats(lport); |
582b45bc RL |
1501 | stats->TxFrames++; |
1502 | stats->TxWords += wlen; | |
85b4aa49 RL |
1503 | |
1504 | /* send down to lld */ | |
1875f27e | 1505 | fr_dev(fp) = lport; |
014f5c3f | 1506 | if (port->fcoe_pending_queue.qlen) |
1875f27e | 1507 | fcoe_check_wait_queue(lport, skb); |
4bb6b515 | 1508 | else if (fcoe_start_io(skb)) |
1875f27e | 1509 | fcoe_check_wait_queue(lport, skb); |
85b4aa49 RL |
1510 | |
1511 | return 0; | |
1512 | } | |
85b4aa49 | 1513 | |
e7a51997 | 1514 | /** |
1875f27e RL |
1515 | * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion |
1516 | * @skb: The completed skb (argument required by destructor) | |
e7a51997 JE |
1517 | */ |
1518 | static void fcoe_percpu_flush_done(struct sk_buff *skb) | |
1519 | { | |
1520 | complete(&fcoe_flush_completion); | |
1521 | } | |
1522 | ||
34f42a07 | 1523 | /** |
859b7b64 CL |
1524 | * fcoe_recv_frame() - process a single received frame |
1525 | * @skb: frame to process | |
85b4aa49 | 1526 | */ |
859b7b64 | 1527 | static void fcoe_recv_frame(struct sk_buff *skb) |
85b4aa49 | 1528 | { |
85b4aa49 | 1529 | u32 fr_len; |
1875f27e | 1530 | struct fc_lport *lport; |
85b4aa49 RL |
1531 | struct fcoe_rcv_info *fr; |
1532 | struct fcoe_dev_stats *stats; | |
1533 | struct fc_frame_header *fh; | |
85b4aa49 RL |
1534 | struct fcoe_crc_eof crc_eof; |
1535 | struct fc_frame *fp; | |
1536 | u8 *mac = NULL; | |
014f5c3f | 1537 | struct fcoe_port *port; |
85b4aa49 RL |
1538 | struct fcoe_hdr *hp; |
1539 | ||
859b7b64 CL |
1540 | fr = fcoe_dev_from_skb(skb); |
1541 | lport = fr->fr_dev; | |
1542 | if (unlikely(!lport)) { | |
1543 | if (skb->destructor != fcoe_percpu_flush_done) | |
1544 | FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb"); | |
1545 | kfree_skb(skb); | |
1546 | return; | |
1547 | } | |
1548 | ||
1549 | FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d " | |
1550 | "head:%p data:%p tail:%p end:%p sum:%d dev:%s", | |
1551 | skb->len, skb->data_len, | |
1552 | skb->head, skb->data, skb_tail_pointer(skb), | |
1553 | skb_end_pointer(skb), skb->csum, | |
1554 | skb->dev ? skb->dev->name : "<NULL>"); | |
1555 | ||
1556 | /* | |
1557 | * Save source MAC address before discarding header. | |
1558 | */ | |
1559 | port = lport_priv(lport); | |
1560 | if (skb_is_nonlinear(skb)) | |
1561 | skb_linearize(skb); /* not ideal */ | |
1562 | mac = eth_hdr(skb)->h_source; | |
1563 | ||
1564 | /* | |
1565 | * Frame length checks and setting up the header pointers | |
1566 | * was done in fcoe_rcv already. | |
1567 | */ | |
1568 | hp = (struct fcoe_hdr *) skb_network_header(skb); | |
1569 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1570 | ||
1571 | stats = fc_lport_get_stats(lport); | |
1572 | if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { | |
1573 | if (stats->ErrorFrames < 5) | |
1574 | printk(KERN_WARNING "fcoe: FCoE version " | |
1575 | "mismatch: The frame has " | |
1576 | "version %x, but the " | |
1577 | "initiator supports version " | |
1578 | "%x\n", FC_FCOE_DECAPS_VER(hp), | |
1579 | FC_FCOE_VER); | |
1580 | stats->ErrorFrames++; | |
1581 | kfree_skb(skb); | |
1582 | return; | |
1583 | } | |
1584 | ||
1585 | skb_pull(skb, sizeof(struct fcoe_hdr)); | |
1586 | fr_len = skb->len - sizeof(struct fcoe_crc_eof); | |
1587 | ||
1588 | stats->RxFrames++; | |
1589 | stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; | |
1590 | ||
1591 | fp = (struct fc_frame *)skb; | |
1592 | fc_frame_init(fp); | |
1593 | fr_dev(fp) = lport; | |
1594 | fr_sof(fp) = hp->fcoe_sof; | |
1595 | ||
1596 | /* Copy out the CRC and EOF trailer for access */ | |
1597 | if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) { | |
1598 | kfree_skb(skb); | |
1599 | return; | |
1600 | } | |
1601 | fr_eof(fp) = crc_eof.fcoe_eof; | |
1602 | fr_crc(fp) = crc_eof.fcoe_crc32; | |
1603 | if (pskb_trim(skb, fr_len)) { | |
1604 | kfree_skb(skb); | |
1605 | return; | |
1606 | } | |
1607 | ||
1608 | /* | |
1609 | * We only check CRC if no offload is available and if it is | |
1610 | * it's solicited data, in which case, the FCP layer would | |
1611 | * check it during the copy. | |
1612 | */ | |
1613 | if (lport->crc_offload && | |
1614 | skb->ip_summed == CHECKSUM_UNNECESSARY) | |
1615 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; | |
1616 | else | |
1617 | fr_flags(fp) |= FCPHF_CRC_UNCHECKED; | |
1618 | ||
1619 | fh = fc_frame_header_get(fp); | |
1620 | if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && | |
1621 | fh->fh_type == FC_TYPE_FCP) { | |
1622 | fc_exch_recv(lport, fp); | |
1623 | return; | |
1624 | } | |
1625 | if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) { | |
1626 | if (le32_to_cpu(fr_crc(fp)) != | |
1627 | ~crc32(~0, skb->data, fr_len)) { | |
1628 | if (stats->InvalidCRCCount < 5) | |
1629 | printk(KERN_WARNING "fcoe: dropping " | |
1630 | "frame with CRC error\n"); | |
1631 | stats->InvalidCRCCount++; | |
1632 | stats->ErrorFrames++; | |
1633 | fc_frame_free(fp); | |
1634 | return; | |
1635 | } | |
1636 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; | |
1637 | } | |
1638 | fc_exch_recv(lport, fp); | |
1639 | } | |
1640 | ||
1641 | /** | |
1642 | * fcoe_percpu_receive_thread() - The per-CPU packet receive thread | |
1643 | * @arg: The per-CPU context | |
1644 | * | |
1645 | * Return: 0 for success | |
1646 | */ | |
1647 | int fcoe_percpu_receive_thread(void *arg) | |
1648 | { | |
1649 | struct fcoe_percpu_s *p = arg; | |
1650 | struct sk_buff *skb; | |
1651 | ||
4469c195 | 1652 | set_user_nice(current, -20); |
85b4aa49 RL |
1653 | |
1654 | while (!kthread_should_stop()) { | |
1655 | ||
1656 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1657 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) { | |
1658 | set_current_state(TASK_INTERRUPTIBLE); | |
1659 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1660 | schedule(); | |
1661 | set_current_state(TASK_RUNNING); | |
1662 | if (kthread_should_stop()) | |
1663 | return 0; | |
1664 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1665 | } | |
1666 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
859b7b64 | 1667 | fcoe_recv_frame(skb); |
85b4aa49 RL |
1668 | } |
1669 | return 0; | |
1670 | } | |
1671 | ||
85b4aa49 | 1672 | /** |
1875f27e RL |
1673 | * fcoe_check_wait_queue() - Attempt to clear the transmit backlog |
1674 | * @lport: The local port whose backlog is to be cleared | |
85b4aa49 | 1675 | * |
1875f27e RL |
1676 | * This empties the wait_queue, dequeues the head of the wait_queue queue |
1677 | * and calls fcoe_start_io() for each packet. If all skb have been | |
1678 | * transmitted it returns the qlen. If an error occurs it restores | |
1679 | * wait_queue (to try again later) and returns -1. | |
85b4aa49 | 1680 | * |
1875f27e RL |
1681 | * The wait_queue is used when the skb transmit fails. The failed skb |
1682 | * will go in the wait_queue which will be emptied by the timer function or | |
85b4aa49 | 1683 | * by the next skb transmit. |
34f42a07 | 1684 | */ |
1875f27e | 1685 | static void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb) |
85b4aa49 | 1686 | { |
1875f27e | 1687 | struct fcoe_port *port = lport_priv(lport); |
4bb6b515 | 1688 | int rc; |
85b4aa49 | 1689 | |
014f5c3f | 1690 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
4bb6b515 VD |
1691 | |
1692 | if (skb) | |
014f5c3f | 1693 | __skb_queue_tail(&port->fcoe_pending_queue, skb); |
4bb6b515 | 1694 | |
014f5c3f | 1695 | if (port->fcoe_pending_queue_active) |
c826a314 | 1696 | goto out; |
014f5c3f | 1697 | port->fcoe_pending_queue_active = 1; |
55c8bafb | 1698 | |
014f5c3f | 1699 | while (port->fcoe_pending_queue.qlen) { |
55c8bafb | 1700 | /* keep qlen > 0 until fcoe_start_io succeeds */ |
014f5c3f CL |
1701 | port->fcoe_pending_queue.qlen++; |
1702 | skb = __skb_dequeue(&port->fcoe_pending_queue); | |
55c8bafb | 1703 | |
014f5c3f | 1704 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
55c8bafb | 1705 | rc = fcoe_start_io(skb); |
014f5c3f | 1706 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
55c8bafb CL |
1707 | |
1708 | if (rc) { | |
014f5c3f | 1709 | __skb_queue_head(&port->fcoe_pending_queue, skb); |
55c8bafb | 1710 | /* undo temporary increment above */ |
014f5c3f | 1711 | port->fcoe_pending_queue.qlen--; |
55c8bafb | 1712 | break; |
85b4aa49 | 1713 | } |
55c8bafb | 1714 | /* undo temporary increment above */ |
014f5c3f | 1715 | port->fcoe_pending_queue.qlen--; |
85b4aa49 | 1716 | } |
55c8bafb | 1717 | |
014f5c3f | 1718 | if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH) |
1875f27e | 1719 | lport->qfull = 0; |
014f5c3f CL |
1720 | if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer)) |
1721 | mod_timer(&port->timer, jiffies + 2); | |
1722 | port->fcoe_pending_queue_active = 0; | |
c826a314 | 1723 | out: |
014f5c3f | 1724 | if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH) |
1875f27e | 1725 | lport->qfull = 1; |
014f5c3f | 1726 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
4bb6b515 | 1727 | return; |
85b4aa49 RL |
1728 | } |
1729 | ||
85b4aa49 | 1730 | /** |
1875f27e | 1731 | * fcoe_dev_setup() - Setup the link change notification interface |
34f42a07 | 1732 | */ |
b0d428ad | 1733 | static void fcoe_dev_setup(void) |
85b4aa49 | 1734 | { |
85b4aa49 RL |
1735 | register_netdevice_notifier(&fcoe_notifier); |
1736 | } | |
1737 | ||
1738 | /** | |
1875f27e | 1739 | * fcoe_dev_cleanup() - Cleanup the link change notification interface |
34f42a07 | 1740 | */ |
85b4aa49 RL |
1741 | static void fcoe_dev_cleanup(void) |
1742 | { | |
1743 | unregister_netdevice_notifier(&fcoe_notifier); | |
1744 | } | |
1745 | ||
1746 | /** | |
1875f27e RL |
1747 | * fcoe_device_notification() - Handler for net device events |
1748 | * @notifier: The context of the notification | |
1749 | * @event: The type of event | |
1750 | * @ptr: The net device that the event was on | |
85b4aa49 | 1751 | * |
1875f27e | 1752 | * This function is called by the Ethernet driver in case of link change event. |
85b4aa49 RL |
1753 | * |
1754 | * Returns: 0 for success | |
34f42a07 | 1755 | */ |
85b4aa49 RL |
1756 | static int fcoe_device_notification(struct notifier_block *notifier, |
1757 | ulong event, void *ptr) | |
1758 | { | |
1875f27e | 1759 | struct fc_lport *lport = NULL; |
1d1b88dc | 1760 | struct net_device *netdev = ptr; |
014f5c3f | 1761 | struct fcoe_interface *fcoe; |
2e70e241 | 1762 | struct fcoe_port *port; |
85b4aa49 | 1763 | struct fcoe_dev_stats *stats; |
97c8389d | 1764 | u32 link_possible = 1; |
85b4aa49 RL |
1765 | u32 mfs; |
1766 | int rc = NOTIFY_OK; | |
1767 | ||
014f5c3f | 1768 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
25024989 | 1769 | if (fcoe->netdev == netdev) { |
1875f27e | 1770 | lport = fcoe->ctlr.lp; |
85b4aa49 RL |
1771 | break; |
1772 | } | |
1773 | } | |
1875f27e | 1774 | if (!lport) { |
85b4aa49 RL |
1775 | rc = NOTIFY_DONE; |
1776 | goto out; | |
1777 | } | |
1778 | ||
85b4aa49 RL |
1779 | switch (event) { |
1780 | case NETDEV_DOWN: | |
1781 | case NETDEV_GOING_DOWN: | |
97c8389d | 1782 | link_possible = 0; |
85b4aa49 RL |
1783 | break; |
1784 | case NETDEV_UP: | |
1785 | case NETDEV_CHANGE: | |
85b4aa49 RL |
1786 | break; |
1787 | case NETDEV_CHANGEMTU: | |
7221d7e5 YZ |
1788 | if (netdev->features & NETIF_F_FCOE_MTU) |
1789 | break; | |
1d1b88dc VD |
1790 | mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + |
1791 | sizeof(struct fcoe_crc_eof)); | |
85b4aa49 | 1792 | if (mfs >= FC_MIN_MAX_FRAME) |
1875f27e | 1793 | fc_set_mfs(lport, mfs); |
85b4aa49 RL |
1794 | break; |
1795 | case NETDEV_REGISTER: | |
1796 | break; | |
2e70e241 CL |
1797 | case NETDEV_UNREGISTER: |
1798 | list_del(&fcoe->list); | |
1799 | port = lport_priv(fcoe->ctlr.lp); | |
1800 | fcoe_interface_cleanup(fcoe); | |
1801 | schedule_work(&port->destroy_work); | |
1802 | goto out; | |
1803 | break; | |
85b4aa49 | 1804 | default: |
1d1b88dc | 1805 | FCOE_NETDEV_DBG(netdev, "Unknown event %ld " |
d5488eb9 | 1806 | "from netdev netlink\n", event); |
85b4aa49 | 1807 | } |
1875f27e | 1808 | if (link_possible && !fcoe_link_ok(lport)) |
3fe9a0ba CL |
1809 | fcoe_ctlr_link_up(&fcoe->ctlr); |
1810 | else if (fcoe_ctlr_link_down(&fcoe->ctlr)) { | |
1875f27e | 1811 | stats = fc_lport_get_stats(lport); |
97c8389d | 1812 | stats->LinkFailureCount++; |
1875f27e | 1813 | fcoe_clean_pending_queue(lport); |
85b4aa49 RL |
1814 | } |
1815 | out: | |
1816 | return rc; | |
1817 | } | |
1818 | ||
1819 | /** | |
1875f27e RL |
1820 | * fcoe_if_to_netdev() - Parse a name buffer to get a net device |
1821 | * @buffer: The name of the net device | |
85b4aa49 | 1822 | * |
1875f27e | 1823 | * Returns: NULL or a ptr to net_device |
34f42a07 | 1824 | */ |
85b4aa49 RL |
1825 | static struct net_device *fcoe_if_to_netdev(const char *buffer) |
1826 | { | |
1827 | char *cp; | |
1828 | char ifname[IFNAMSIZ + 2]; | |
1829 | ||
1830 | if (buffer) { | |
1831 | strlcpy(ifname, buffer, IFNAMSIZ); | |
1832 | cp = ifname + strlen(ifname); | |
1833 | while (--cp >= ifname && *cp == '\n') | |
1834 | *cp = '\0'; | |
1835 | return dev_get_by_name(&init_net, ifname); | |
1836 | } | |
1837 | return NULL; | |
1838 | } | |
1839 | ||
85b4aa49 | 1840 | /** |
1875f27e RL |
1841 | * fcoe_destroy() - Destroy a FCoE interface |
1842 | * @buffer: The name of the Ethernet interface to be destroyed | |
1843 | * @kp: The associated kernel parameter | |
1844 | * | |
1845 | * Called from sysfs. | |
85b4aa49 RL |
1846 | * |
1847 | * Returns: 0 for success | |
34f42a07 | 1848 | */ |
85b4aa49 RL |
1849 | static int fcoe_destroy(const char *buffer, struct kernel_param *kp) |
1850 | { | |
030f4e00 | 1851 | struct fcoe_interface *fcoe; |
2e70e241 | 1852 | struct net_device *netdev; |
8eca355f | 1853 | int rc = 0; |
85b4aa49 | 1854 | |
dfc1d0fe CL |
1855 | mutex_lock(&fcoe_config_mutex); |
1856 | #ifdef CONFIG_FCOE_MODULE | |
1857 | /* | |
1858 | * Make sure the module has been initialized, and is not about to be | |
1859 | * removed. Module paramter sysfs files are writable before the | |
1860 | * module_init function is called and after module_exit. | |
1861 | */ | |
1862 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
1863 | rc = -ENODEV; | |
1864 | goto out_nodev; | |
1865 | } | |
1866 | #endif | |
1867 | ||
85b4aa49 RL |
1868 | netdev = fcoe_if_to_netdev(buffer); |
1869 | if (!netdev) { | |
1870 | rc = -ENODEV; | |
1871 | goto out_nodev; | |
1872 | } | |
2e70e241 | 1873 | |
090eb6c4 | 1874 | rtnl_lock(); |
2e70e241 CL |
1875 | fcoe = fcoe_hostlist_lookup_port(netdev); |
1876 | if (!fcoe) { | |
090eb6c4 | 1877 | rtnl_unlock(); |
85b4aa49 RL |
1878 | rc = -ENODEV; |
1879 | goto out_putdev; | |
1880 | } | |
2e70e241 | 1881 | list_del(&fcoe->list); |
2e70e241 CL |
1882 | fcoe_interface_cleanup(fcoe); |
1883 | rtnl_unlock(); | |
1884 | fcoe_if_destroy(fcoe->ctlr.lp); | |
85b4aa49 RL |
1885 | out_putdev: |
1886 | dev_put(netdev); | |
1887 | out_nodev: | |
dfc1d0fe | 1888 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 RL |
1889 | return rc; |
1890 | } | |
1891 | ||
1875f27e RL |
1892 | /** |
1893 | * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context | |
1894 | * @work: Handle to the FCoE port to be destroyed | |
1895 | */ | |
2e70e241 CL |
1896 | static void fcoe_destroy_work(struct work_struct *work) |
1897 | { | |
1898 | struct fcoe_port *port; | |
1899 | ||
1900 | port = container_of(work, struct fcoe_port, destroy_work); | |
1901 | mutex_lock(&fcoe_config_mutex); | |
1902 | fcoe_if_destroy(port->lport); | |
1903 | mutex_unlock(&fcoe_config_mutex); | |
1904 | } | |
1905 | ||
85b4aa49 | 1906 | /** |
1875f27e RL |
1907 | * fcoe_create() - Create a fcoe interface |
1908 | * @buffer: The name of the Ethernet interface to create on | |
1909 | * @kp: The associated kernel param | |
1910 | * | |
1911 | * Called from sysfs. | |
85b4aa49 RL |
1912 | * |
1913 | * Returns: 0 for success | |
34f42a07 | 1914 | */ |
85b4aa49 RL |
1915 | static int fcoe_create(const char *buffer, struct kernel_param *kp) |
1916 | { | |
1917 | int rc; | |
030f4e00 | 1918 | struct fcoe_interface *fcoe; |
af7f85d9 | 1919 | struct fc_lport *lport; |
85b4aa49 RL |
1920 | struct net_device *netdev; |
1921 | ||
dfc1d0fe CL |
1922 | mutex_lock(&fcoe_config_mutex); |
1923 | #ifdef CONFIG_FCOE_MODULE | |
1924 | /* | |
1925 | * Make sure the module has been initialized, and is not about to be | |
1926 | * removed. Module paramter sysfs files are writable before the | |
1927 | * module_init function is called and after module_exit. | |
1928 | */ | |
1929 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
1930 | rc = -ENODEV; | |
1931 | goto out_nodev; | |
1932 | } | |
1933 | #endif | |
1934 | ||
2e70e241 | 1935 | rtnl_lock(); |
85b4aa49 RL |
1936 | netdev = fcoe_if_to_netdev(buffer); |
1937 | if (!netdev) { | |
1938 | rc = -ENODEV; | |
1939 | goto out_nodev; | |
1940 | } | |
2e70e241 | 1941 | |
85b4aa49 RL |
1942 | /* look for existing lport */ |
1943 | if (fcoe_hostlist_lookup(netdev)) { | |
1944 | rc = -EEXIST; | |
1945 | goto out_putdev; | |
1946 | } | |
85b4aa49 | 1947 | |
030f4e00 CL |
1948 | fcoe = fcoe_interface_create(netdev); |
1949 | if (!fcoe) { | |
1950 | rc = -ENOMEM; | |
1951 | goto out_putdev; | |
1952 | } | |
1953 | ||
9a05753b | 1954 | lport = fcoe_if_create(fcoe, &netdev->dev, 0); |
af7f85d9 | 1955 | if (IS_ERR(lport)) { |
d5488eb9 | 1956 | printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", |
85b4aa49 | 1957 | netdev->name); |
85b4aa49 | 1958 | rc = -EIO; |
2e70e241 | 1959 | fcoe_interface_cleanup(fcoe); |
030f4e00 | 1960 | goto out_free; |
85b4aa49 | 1961 | } |
030f4e00 | 1962 | |
54b649f8 CL |
1963 | /* Make this the "master" N_Port */ |
1964 | fcoe->ctlr.lp = lport; | |
1965 | ||
c863df33 CL |
1966 | /* add to lports list */ |
1967 | fcoe_hostlist_add(lport); | |
1968 | ||
54b649f8 CL |
1969 | /* start FIP Discovery and FLOGI */ |
1970 | lport->boot_time = jiffies; | |
1971 | fc_fabric_login(lport); | |
1972 | if (!fcoe_link_ok(lport)) | |
1973 | fcoe_ctlr_link_up(&fcoe->ctlr); | |
030f4e00 | 1974 | |
54b649f8 | 1975 | rc = 0; |
030f4e00 | 1976 | out_free: |
54b649f8 CL |
1977 | /* |
1978 | * Release from init in fcoe_interface_create(), on success lport | |
1979 | * should be holding a reference taken in fcoe_if_create(). | |
1980 | */ | |
030f4e00 | 1981 | fcoe_interface_put(fcoe); |
85b4aa49 RL |
1982 | out_putdev: |
1983 | dev_put(netdev); | |
1984 | out_nodev: | |
2e70e241 | 1985 | rtnl_unlock(); |
dfc1d0fe | 1986 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 RL |
1987 | return rc; |
1988 | } | |
1989 | ||
34f42a07 | 1990 | /** |
1875f27e RL |
1991 | * fcoe_link_ok() - Check if the link is OK for a local port |
1992 | * @lport: The local port to check link on | |
85b4aa49 RL |
1993 | * |
1994 | * Any permanently-disqualifying conditions have been previously checked. | |
1995 | * This also updates the speed setting, which may change with link for 100/1000. | |
1996 | * | |
1997 | * This function should probably be checking for PAUSE support at some point | |
1998 | * in the future. Currently Per-priority-pause is not determinable using | |
1999 | * ethtool, so we shouldn't be restrictive until that problem is resolved. | |
2000 | * | |
2001 | * Returns: 0 if link is OK for use by FCoE. | |
2002 | * | |
2003 | */ | |
1875f27e | 2004 | int fcoe_link_ok(struct fc_lport *lport) |
85b4aa49 | 2005 | { |
1875f27e RL |
2006 | struct fcoe_port *port = lport_priv(lport); |
2007 | struct net_device *netdev = port->fcoe->netdev; | |
85b4aa49 | 2008 | struct ethtool_cmd ecmd = { ETHTOOL_GSET }; |
85b4aa49 | 2009 | |
1875f27e RL |
2010 | if ((netdev->flags & IFF_UP) && netif_carrier_ok(netdev) && |
2011 | (!dev_ethtool_get_settings(netdev, &ecmd))) { | |
2012 | lport->link_supported_speeds &= | |
2f718d64 YZ |
2013 | ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT); |
2014 | if (ecmd.supported & (SUPPORTED_1000baseT_Half | | |
2015 | SUPPORTED_1000baseT_Full)) | |
1875f27e | 2016 | lport->link_supported_speeds |= FC_PORTSPEED_1GBIT; |
2f718d64 | 2017 | if (ecmd.supported & SUPPORTED_10000baseT_Full) |
1875f27e | 2018 | lport->link_supported_speeds |= |
2f718d64 YZ |
2019 | FC_PORTSPEED_10GBIT; |
2020 | if (ecmd.speed == SPEED_1000) | |
1875f27e | 2021 | lport->link_speed = FC_PORTSPEED_1GBIT; |
2f718d64 | 2022 | if (ecmd.speed == SPEED_10000) |
1875f27e | 2023 | lport->link_speed = FC_PORTSPEED_10GBIT; |
85b4aa49 | 2024 | |
2f718d64 YZ |
2025 | return 0; |
2026 | } | |
2027 | return -1; | |
85b4aa49 | 2028 | } |
85b4aa49 | 2029 | |
34f42a07 | 2030 | /** |
1875f27e RL |
2031 | * fcoe_percpu_clean() - Clear all pending skbs for an local port |
2032 | * @lport: The local port whose skbs are to be cleared | |
e7a51997 JE |
2033 | * |
2034 | * Must be called with fcoe_create_mutex held to single-thread completion. | |
2035 | * | |
2036 | * This flushes the pending skbs by adding a new skb to each queue and | |
2037 | * waiting until they are all freed. This assures us that not only are | |
2038 | * there no packets that will be handled by the lport, but also that any | |
2039 | * threads already handling packet have returned. | |
85b4aa49 | 2040 | */ |
1875f27e | 2041 | void fcoe_percpu_clean(struct fc_lport *lport) |
85b4aa49 | 2042 | { |
85b4aa49 RL |
2043 | struct fcoe_percpu_s *pp; |
2044 | struct fcoe_rcv_info *fr; | |
2045 | struct sk_buff_head *list; | |
2046 | struct sk_buff *skb, *next; | |
2047 | struct sk_buff *head; | |
5e5e92df | 2048 | unsigned int cpu; |
85b4aa49 | 2049 | |
5e5e92df RL |
2050 | for_each_possible_cpu(cpu) { |
2051 | pp = &per_cpu(fcoe_percpu, cpu); | |
2052 | spin_lock_bh(&pp->fcoe_rx_list.lock); | |
2053 | list = &pp->fcoe_rx_list; | |
2054 | head = list->next; | |
2055 | for (skb = head; skb != (struct sk_buff *)list; | |
2056 | skb = next) { | |
2057 | next = skb->next; | |
2058 | fr = fcoe_dev_from_skb(skb); | |
1875f27e | 2059 | if (fr->fr_dev == lport) { |
5e5e92df RL |
2060 | __skb_unlink(skb, list); |
2061 | kfree_skb(skb); | |
85b4aa49 | 2062 | } |
85b4aa49 | 2063 | } |
e7a51997 JE |
2064 | |
2065 | if (!pp->thread || !cpu_online(cpu)) { | |
2066 | spin_unlock_bh(&pp->fcoe_rx_list.lock); | |
2067 | continue; | |
2068 | } | |
2069 | ||
2070 | skb = dev_alloc_skb(0); | |
2071 | if (!skb) { | |
2072 | spin_unlock_bh(&pp->fcoe_rx_list.lock); | |
2073 | continue; | |
2074 | } | |
2075 | skb->destructor = fcoe_percpu_flush_done; | |
2076 | ||
2077 | __skb_queue_tail(&pp->fcoe_rx_list, skb); | |
2078 | if (pp->fcoe_rx_list.qlen == 1) | |
2079 | wake_up_process(pp->thread); | |
5e5e92df | 2080 | spin_unlock_bh(&pp->fcoe_rx_list.lock); |
e7a51997 JE |
2081 | |
2082 | wait_for_completion(&fcoe_flush_completion); | |
85b4aa49 RL |
2083 | } |
2084 | } | |
85b4aa49 RL |
2085 | |
2086 | /** | |
34f42a07 | 2087 | * fcoe_clean_pending_queue() - Dequeue a skb and free it |
1875f27e | 2088 | * @lport: The local port to dequeue a skb on |
34f42a07 | 2089 | */ |
1875f27e | 2090 | void fcoe_clean_pending_queue(struct fc_lport *lport) |
85b4aa49 | 2091 | { |
1875f27e | 2092 | struct fcoe_port *port = lport_priv(lport); |
85b4aa49 RL |
2093 | struct sk_buff *skb; |
2094 | ||
014f5c3f CL |
2095 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
2096 | while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) { | |
2097 | spin_unlock_bh(&port->fcoe_pending_queue.lock); | |
85b4aa49 | 2098 | kfree_skb(skb); |
014f5c3f | 2099 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
85b4aa49 | 2100 | } |
014f5c3f | 2101 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
85b4aa49 | 2102 | } |
85b4aa49 | 2103 | |
34f42a07 | 2104 | /** |
1875f27e RL |
2105 | * fcoe_reset() - Reset a local port |
2106 | * @shost: The SCSI host associated with the local port to be reset | |
85b4aa49 | 2107 | * |
1875f27e | 2108 | * Returns: Always 0 (return value required by FC transport template) |
85b4aa49 RL |
2109 | */ |
2110 | int fcoe_reset(struct Scsi_Host *shost) | |
2111 | { | |
2112 | struct fc_lport *lport = shost_priv(shost); | |
2113 | fc_lport_reset(lport); | |
2114 | return 0; | |
2115 | } | |
85b4aa49 | 2116 | |
34f42a07 | 2117 | /** |
1875f27e RL |
2118 | * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device |
2119 | * @netdev: The net device used as a key | |
85b4aa49 | 2120 | * |
1875f27e RL |
2121 | * Locking: Must be called with the RNL mutex held. |
2122 | * | |
2123 | * Returns: NULL or the FCoE interface | |
85b4aa49 | 2124 | */ |
014f5c3f | 2125 | static struct fcoe_interface * |
1875f27e | 2126 | fcoe_hostlist_lookup_port(const struct net_device *netdev) |
85b4aa49 | 2127 | { |
014f5c3f | 2128 | struct fcoe_interface *fcoe; |
85b4aa49 | 2129 | |
014f5c3f | 2130 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
1875f27e | 2131 | if (fcoe->netdev == netdev) |
014f5c3f | 2132 | return fcoe; |
85b4aa49 | 2133 | } |
85b4aa49 RL |
2134 | return NULL; |
2135 | } | |
2136 | ||
34f42a07 | 2137 | /** |
1875f27e RL |
2138 | * fcoe_hostlist_lookup() - Find the local port associated with a |
2139 | * given net device | |
2140 | * @netdev: The netdevice used as a key | |
85b4aa49 | 2141 | * |
1875f27e RL |
2142 | * Locking: Must be called with the RTNL mutex held |
2143 | * | |
2144 | * Returns: NULL or the local port | |
85b4aa49 | 2145 | */ |
090eb6c4 | 2146 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) |
85b4aa49 | 2147 | { |
014f5c3f | 2148 | struct fcoe_interface *fcoe; |
85b4aa49 | 2149 | |
014f5c3f | 2150 | fcoe = fcoe_hostlist_lookup_port(netdev); |
3fe9a0ba | 2151 | return (fcoe) ? fcoe->ctlr.lp : NULL; |
85b4aa49 | 2152 | } |
85b4aa49 | 2153 | |
34f42a07 | 2154 | /** |
1875f27e RL |
2155 | * fcoe_hostlist_add() - Add the FCoE interface identified by a local |
2156 | * port to the hostlist | |
2157 | * @lport: The local port that identifies the FCoE interface to be added | |
85b4aa49 | 2158 | * |
090eb6c4 | 2159 | * Locking: must be called with the RTNL mutex held |
1875f27e RL |
2160 | * |
2161 | * Returns: 0 for success | |
85b4aa49 | 2162 | */ |
090eb6c4 | 2163 | static int fcoe_hostlist_add(const struct fc_lport *lport) |
85b4aa49 | 2164 | { |
014f5c3f CL |
2165 | struct fcoe_interface *fcoe; |
2166 | struct fcoe_port *port; | |
2167 | ||
2168 | fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); | |
2169 | if (!fcoe) { | |
2170 | port = lport_priv(lport); | |
2171 | fcoe = port->fcoe; | |
2172 | list_add_tail(&fcoe->list, &fcoe_hostlist); | |
85b4aa49 RL |
2173 | } |
2174 | return 0; | |
2175 | } | |
85b4aa49 | 2176 | |
85b4aa49 | 2177 | /** |
1875f27e | 2178 | * fcoe_init() - Initialize fcoe.ko |
85b4aa49 | 2179 | * |
1875f27e | 2180 | * Returns: 0 on success, or a negative value on failure |
34f42a07 | 2181 | */ |
85b4aa49 RL |
2182 | static int __init fcoe_init(void) |
2183 | { | |
1875f27e | 2184 | struct fcoe_percpu_s *p; |
38eccabd | 2185 | unsigned int cpu; |
8976f424 | 2186 | int rc = 0; |
85b4aa49 | 2187 | |
dfc1d0fe CL |
2188 | mutex_lock(&fcoe_config_mutex); |
2189 | ||
38eccabd | 2190 | for_each_possible_cpu(cpu) { |
5e5e92df | 2191 | p = &per_cpu(fcoe_percpu, cpu); |
38eccabd RL |
2192 | skb_queue_head_init(&p->fcoe_rx_list); |
2193 | } | |
2194 | ||
8976f424 RL |
2195 | for_each_online_cpu(cpu) |
2196 | fcoe_percpu_thread_create(cpu); | |
85b4aa49 | 2197 | |
8976f424 RL |
2198 | /* Initialize per CPU interrupt thread */ |
2199 | rc = register_hotcpu_notifier(&fcoe_cpu_notifier); | |
2200 | if (rc) | |
2201 | goto out_free; | |
85b4aa49 | 2202 | |
8976f424 | 2203 | /* Setup link change notification */ |
85b4aa49 RL |
2204 | fcoe_dev_setup(); |
2205 | ||
5892c32f CL |
2206 | rc = fcoe_if_init(); |
2207 | if (rc) | |
2208 | goto out_free; | |
85b4aa49 | 2209 | |
dfc1d0fe | 2210 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 | 2211 | return 0; |
8976f424 RL |
2212 | |
2213 | out_free: | |
2214 | for_each_online_cpu(cpu) { | |
2215 | fcoe_percpu_thread_destroy(cpu); | |
2216 | } | |
dfc1d0fe | 2217 | mutex_unlock(&fcoe_config_mutex); |
8976f424 | 2218 | return rc; |
85b4aa49 RL |
2219 | } |
2220 | module_init(fcoe_init); | |
2221 | ||
2222 | /** | |
1875f27e | 2223 | * fcoe_exit() - Clean up fcoe.ko |
85b4aa49 | 2224 | * |
1875f27e | 2225 | * Returns: 0 on success or a negative value on failure |
34f42a07 | 2226 | */ |
85b4aa49 RL |
2227 | static void __exit fcoe_exit(void) |
2228 | { | |
014f5c3f | 2229 | struct fcoe_interface *fcoe, *tmp; |
2e70e241 | 2230 | struct fcoe_port *port; |
1875f27e | 2231 | unsigned int cpu; |
85b4aa49 | 2232 | |
dfc1d0fe CL |
2233 | mutex_lock(&fcoe_config_mutex); |
2234 | ||
85b4aa49 RL |
2235 | fcoe_dev_cleanup(); |
2236 | ||
5919a595 | 2237 | /* releases the associated fcoe hosts */ |
090eb6c4 CL |
2238 | rtnl_lock(); |
2239 | list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { | |
c863df33 | 2240 | list_del(&fcoe->list); |
2e70e241 | 2241 | port = lport_priv(fcoe->ctlr.lp); |
2e70e241 | 2242 | fcoe_interface_cleanup(fcoe); |
2e70e241 | 2243 | schedule_work(&port->destroy_work); |
c863df33 | 2244 | } |
090eb6c4 | 2245 | rtnl_unlock(); |
85b4aa49 | 2246 | |
8976f424 RL |
2247 | unregister_hotcpu_notifier(&fcoe_cpu_notifier); |
2248 | ||
014f5c3f | 2249 | for_each_online_cpu(cpu) |
8976f424 | 2250 | fcoe_percpu_thread_destroy(cpu); |
85b4aa49 | 2251 | |
dfc1d0fe | 2252 | mutex_unlock(&fcoe_config_mutex); |
2e70e241 CL |
2253 | |
2254 | /* flush any asyncronous interface destroys, | |
2255 | * this should happen after the netdev notifier is unregistered */ | |
2256 | flush_scheduled_work(); | |
9a05753b CL |
2257 | /* That will flush out all the N_Ports on the hostlist, but now we |
2258 | * may have NPIV VN_Ports scheduled for destruction */ | |
2259 | flush_scheduled_work(); | |
2e70e241 CL |
2260 | |
2261 | /* detach from scsi transport | |
2262 | * must happen after all destroys are done, therefor after the flush */ | |
2263 | fcoe_if_exit(); | |
85b4aa49 RL |
2264 | } |
2265 | module_exit(fcoe_exit); | |
11b56188 CL |
2266 | |
2267 | /** | |
2268 | * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler | |
2269 | * @seq: active sequence in the FLOGI or FDISC exchange | |
2270 | * @fp: response frame, or error encoded in a pointer (timeout) | |
2271 | * @arg: pointer the the fcoe_ctlr structure | |
2272 | * | |
2273 | * This handles MAC address managment for FCoE, then passes control on to | |
2274 | * the libfc FLOGI response handler. | |
2275 | */ | |
2276 | static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) | |
2277 | { | |
2278 | struct fcoe_ctlr *fip = arg; | |
2279 | struct fc_exch *exch = fc_seq_exch(seq); | |
2280 | struct fc_lport *lport = exch->lp; | |
2281 | u8 *mac; | |
2282 | ||
2283 | if (IS_ERR(fp)) | |
2284 | goto done; | |
2285 | ||
2286 | mac = fr_cb(fp)->granted_mac; | |
2287 | if (is_zero_ether_addr(mac)) { | |
2288 | /* pre-FIP */ | |
386309ce | 2289 | if (fcoe_ctlr_recv_flogi(fip, lport, fp)) { |
11b56188 CL |
2290 | fc_frame_free(fp); |
2291 | return; | |
2292 | } | |
11b56188 | 2293 | } |
386309ce | 2294 | fcoe_update_src_mac(lport, mac); |
11b56188 CL |
2295 | done: |
2296 | fc_lport_flogi_resp(seq, fp, lport); | |
2297 | } | |
2298 | ||
2299 | /** | |
2300 | * fcoe_logo_resp() - FCoE specific LOGO response handler | |
2301 | * @seq: active sequence in the LOGO exchange | |
2302 | * @fp: response frame, or error encoded in a pointer (timeout) | |
2303 | * @arg: pointer the the fcoe_ctlr structure | |
2304 | * | |
2305 | * This handles MAC address managment for FCoE, then passes control on to | |
2306 | * the libfc LOGO response handler. | |
2307 | */ | |
2308 | static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) | |
2309 | { | |
386309ce | 2310 | struct fc_lport *lport = arg; |
11b56188 CL |
2311 | static u8 zero_mac[ETH_ALEN] = { 0 }; |
2312 | ||
2313 | if (!IS_ERR(fp)) | |
386309ce | 2314 | fcoe_update_src_mac(lport, zero_mac); |
11b56188 CL |
2315 | fc_lport_logo_resp(seq, fp, lport); |
2316 | } | |
2317 | ||
2318 | /** | |
2319 | * fcoe_elsct_send - FCoE specific ELS handler | |
2320 | * | |
2321 | * This does special case handling of FIP encapsualted ELS exchanges for FCoE, | |
2322 | * using FCoE specific response handlers and passing the FIP controller as | |
2323 | * the argument (the lport is still available from the exchange). | |
2324 | * | |
2325 | * Most of the work here is just handed off to the libfc routine. | |
2326 | */ | |
1875f27e RL |
2327 | static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, |
2328 | struct fc_frame *fp, unsigned int op, | |
2329 | void (*resp)(struct fc_seq *, | |
2330 | struct fc_frame *, | |
2331 | void *), | |
2332 | void *arg, u32 timeout) | |
11b56188 CL |
2333 | { |
2334 | struct fcoe_port *port = lport_priv(lport); | |
2335 | struct fcoe_interface *fcoe = port->fcoe; | |
2336 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
2337 | struct fc_frame_header *fh = fc_frame_header_get(fp); | |
2338 | ||
2339 | switch (op) { | |
2340 | case ELS_FLOGI: | |
2341 | case ELS_FDISC: | |
2342 | return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, | |
2343 | fip, timeout); | |
2344 | case ELS_LOGO: | |
2345 | /* only hook onto fabric logouts, not port logouts */ | |
2346 | if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) | |
2347 | break; | |
2348 | return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, | |
386309ce | 2349 | lport, timeout); |
11b56188 CL |
2350 | } |
2351 | return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); | |
2352 | } | |
2353 | ||
9a05753b CL |
2354 | /** |
2355 | * fcoe_vport_create() - create an fc_host/scsi_host for a vport | |
2356 | * @vport: fc_vport object to create a new fc_host for | |
2357 | * @disabled: start the new fc_host in a disabled state by default? | |
2358 | * | |
2359 | * Returns: 0 for success | |
2360 | */ | |
2361 | static int fcoe_vport_create(struct fc_vport *vport, bool disabled) | |
2362 | { | |
2363 | struct Scsi_Host *shost = vport_to_shost(vport); | |
2364 | struct fc_lport *n_port = shost_priv(shost); | |
2365 | struct fcoe_port *port = lport_priv(n_port); | |
2366 | struct fcoe_interface *fcoe = port->fcoe; | |
2367 | struct net_device *netdev = fcoe->netdev; | |
2368 | struct fc_lport *vn_port; | |
2369 | ||
2370 | mutex_lock(&fcoe_config_mutex); | |
2371 | vn_port = fcoe_if_create(fcoe, &vport->dev, 1); | |
2372 | mutex_unlock(&fcoe_config_mutex); | |
2373 | ||
2374 | if (IS_ERR(vn_port)) { | |
2375 | printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", | |
2376 | netdev->name); | |
2377 | return -EIO; | |
2378 | } | |
2379 | ||
2380 | if (disabled) { | |
2381 | fc_vport_set_state(vport, FC_VPORT_DISABLED); | |
2382 | } else { | |
2383 | vn_port->boot_time = jiffies; | |
2384 | fc_fabric_login(vn_port); | |
2385 | fc_vport_setlink(vn_port); | |
2386 | } | |
2387 | return 0; | |
2388 | } | |
2389 | ||
2390 | /** | |
2391 | * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport | |
2392 | * @vport: fc_vport object that is being destroyed | |
2393 | * | |
2394 | * Returns: 0 for success | |
2395 | */ | |
2396 | static int fcoe_vport_destroy(struct fc_vport *vport) | |
2397 | { | |
2398 | struct Scsi_Host *shost = vport_to_shost(vport); | |
2399 | struct fc_lport *n_port = shost_priv(shost); | |
2400 | struct fc_lport *vn_port = vport->dd_data; | |
2401 | struct fcoe_port *port = lport_priv(vn_port); | |
2402 | ||
2403 | mutex_lock(&n_port->lp_mutex); | |
2404 | list_del(&vn_port->list); | |
2405 | mutex_unlock(&n_port->lp_mutex); | |
2406 | schedule_work(&port->destroy_work); | |
2407 | return 0; | |
2408 | } | |
2409 | ||
2410 | /** | |
2411 | * fcoe_vport_disable() - change vport state | |
2412 | * @vport: vport to bring online/offline | |
2413 | * @disable: should the vport be disabled? | |
2414 | */ | |
2415 | static int fcoe_vport_disable(struct fc_vport *vport, bool disable) | |
2416 | { | |
2417 | struct fc_lport *lport = vport->dd_data; | |
2418 | ||
2419 | if (disable) { | |
2420 | fc_vport_set_state(vport, FC_VPORT_DISABLED); | |
2421 | fc_fabric_logoff(lport); | |
2422 | } else { | |
2423 | lport->boot_time = jiffies; | |
2424 | fc_fabric_login(lport); | |
2425 | fc_vport_setlink(lport); | |
2426 | } | |
2427 | ||
2428 | return 0; | |
2429 | } | |
2430 | ||
dc8596d3 CL |
2431 | /** |
2432 | * fcoe_vport_set_symbolic_name() - append vport string to symbolic name | |
2433 | * @vport: fc_vport with a new symbolic name string | |
2434 | * | |
2435 | * After generating a new symbolic name string, a new RSPN_ID request is | |
2436 | * sent to the name server. There is no response handler, so if it fails | |
2437 | * for some reason it will not be retried. | |
2438 | */ | |
2439 | static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) | |
2440 | { | |
2441 | struct fc_lport *lport = vport->dd_data; | |
2442 | struct fc_frame *fp; | |
2443 | size_t len; | |
2444 | ||
2445 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, | |
2446 | "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, | |
2447 | fcoe_netdev(lport)->name, vport->symbolic_name); | |
2448 | ||
2449 | if (lport->state != LPORT_ST_READY) | |
2450 | return; | |
2451 | ||
2452 | len = strnlen(fc_host_symbolic_name(lport->host), 255); | |
2453 | fp = fc_frame_alloc(lport, | |
2454 | sizeof(struct fc_ct_hdr) + | |
2455 | sizeof(struct fc_ns_rspn) + len); | |
2456 | if (!fp) | |
2457 | return; | |
2458 | lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, | |
b94f8951 | 2459 | NULL, NULL, 3 * lport->r_a_tov); |
dc8596d3 | 2460 | } |
b84056bf YZ |
2461 | |
2462 | /** | |
2463 | * fcoe_get_lesb() - Fill the FCoE Link Error Status Block | |
2464 | * @lport: the local port | |
2465 | * @fc_lesb: the link error status block | |
2466 | */ | |
2467 | static void fcoe_get_lesb(struct fc_lport *lport, | |
2468 | struct fc_els_lesb *fc_lesb) | |
2469 | { | |
2470 | unsigned int cpu; | |
2471 | u32 lfc, vlfc, mdac; | |
2472 | struct fcoe_dev_stats *devst; | |
2473 | struct fcoe_fc_els_lesb *lesb; | |
2474 | struct net_device *netdev = fcoe_netdev(lport); | |
2475 | ||
2476 | lfc = 0; | |
2477 | vlfc = 0; | |
2478 | mdac = 0; | |
2479 | lesb = (struct fcoe_fc_els_lesb *)fc_lesb; | |
2480 | memset(lesb, 0, sizeof(*lesb)); | |
2481 | for_each_possible_cpu(cpu) { | |
2482 | devst = per_cpu_ptr(lport->dev_stats, cpu); | |
2483 | lfc += devst->LinkFailureCount; | |
2484 | vlfc += devst->VLinkFailureCount; | |
2485 | mdac += devst->MissDiscAdvCount; | |
2486 | } | |
2487 | lesb->lesb_link_fail = htonl(lfc); | |
2488 | lesb->lesb_vlink_fail = htonl(vlfc); | |
2489 | lesb->lesb_miss_fka = htonl(mdac); | |
2490 | lesb->lesb_fcs_error = htonl(dev_get_stats(netdev)->rx_crc_errors); | |
2491 | } |