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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 | 28 | #include <linux/crc32.h> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
85b4aa49 RL |
30 | #include <linux/cpu.h> |
31 | #include <linux/fs.h> | |
32 | #include <linux/sysfs.h> | |
33 | #include <linux/ctype.h> | |
34 | #include <scsi/scsi_tcq.h> | |
35 | #include <scsi/scsicam.h> | |
36 | #include <scsi/scsi_transport.h> | |
37 | #include <scsi/scsi_transport_fc.h> | |
38 | #include <net/rtnetlink.h> | |
39 | ||
40 | #include <scsi/fc/fc_encaps.h> | |
97c8389d | 41 | #include <scsi/fc/fc_fip.h> |
85b4aa49 RL |
42 | |
43 | #include <scsi/libfc.h> | |
44 | #include <scsi/fc_frame.h> | |
45 | #include <scsi/libfcoe.h> | |
85b4aa49 | 46 | |
fdd78027 | 47 | #include "fcoe.h" |
7f349142 | 48 | |
85b4aa49 RL |
49 | MODULE_AUTHOR("Open-FCoE.org"); |
50 | MODULE_DESCRIPTION("FCoE"); | |
9b34ecff | 51 | MODULE_LICENSE("GPL v2"); |
85b4aa49 | 52 | |
05cc7390 YZ |
53 | /* Performance tuning parameters for fcoe */ |
54 | static unsigned int fcoe_ddp_min; | |
55 | module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR); | |
56 | MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \ | |
57 | "Direct Data Placement (DDP)."); | |
58 | ||
dfc1d0fe CL |
59 | DEFINE_MUTEX(fcoe_config_mutex); |
60 | ||
e7a51997 JE |
61 | /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */ |
62 | static DECLARE_COMPLETION(fcoe_flush_completion); | |
63 | ||
85b4aa49 | 64 | /* fcoe host list */ |
090eb6c4 | 65 | /* must only by accessed under the RTNL mutex */ |
85b4aa49 | 66 | LIST_HEAD(fcoe_hostlist); |
5e5e92df | 67 | DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu); |
85b4aa49 | 68 | |
dd3fd72e | 69 | /* Function Prototypes */ |
1875f27e | 70 | static int fcoe_reset(struct Scsi_Host *); |
fdd78027 VD |
71 | static int fcoe_xmit(struct fc_lport *, struct fc_frame *); |
72 | static int fcoe_rcv(struct sk_buff *, struct net_device *, | |
73 | struct packet_type *, struct net_device *); | |
1875f27e RL |
74 | static int fcoe_percpu_receive_thread(void *); |
75 | static void fcoe_clean_pending_queue(struct fc_lport *); | |
76 | static void fcoe_percpu_clean(struct fc_lport *); | |
5e4f8fe7 | 77 | static int fcoe_link_speed_update(struct fc_lport *); |
1875f27e | 78 | static int fcoe_link_ok(struct fc_lport *); |
fdd78027 VD |
79 | |
80 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); | |
81 | static int fcoe_hostlist_add(const struct fc_lport *); | |
fdd78027 | 82 | |
4bb6b515 | 83 | static void fcoe_check_wait_queue(struct fc_lport *, struct sk_buff *); |
85b4aa49 RL |
84 | static int fcoe_device_notification(struct notifier_block *, ulong, void *); |
85 | static void fcoe_dev_setup(void); | |
86 | static void fcoe_dev_cleanup(void); | |
1875f27e RL |
87 | static struct fcoe_interface |
88 | *fcoe_hostlist_lookup_port(const struct net_device *); | |
89 | ||
90 | static int fcoe_fip_recv(struct sk_buff *, struct net_device *, | |
91 | struct packet_type *, struct net_device *); | |
92 | ||
93 | static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *); | |
94 | static void fcoe_update_src_mac(struct fc_lport *, u8 *); | |
95 | static u8 *fcoe_get_src_mac(struct fc_lport *); | |
96 | static void fcoe_destroy_work(struct work_struct *); | |
97 | ||
98 | static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *, | |
99 | unsigned int); | |
100 | static int fcoe_ddp_done(struct fc_lport *, u16); | |
101 | ||
102 | static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *); | |
103 | ||
104 | static int fcoe_create(const char *, struct kernel_param *); | |
105 | static int fcoe_destroy(const char *, struct kernel_param *); | |
55a66d3c VD |
106 | static int fcoe_enable(const char *, struct kernel_param *); |
107 | static int fcoe_disable(const char *, struct kernel_param *); | |
1875f27e | 108 | |
1875f27e RL |
109 | static struct fc_seq *fcoe_elsct_send(struct fc_lport *, |
110 | u32 did, struct fc_frame *, | |
111 | unsigned int op, | |
112 | void (*resp)(struct fc_seq *, | |
113 | struct fc_frame *, | |
114 | void *), | |
115 | void *, u32 timeout); | |
859b7b64 | 116 | static void fcoe_recv_frame(struct sk_buff *skb); |
1875f27e | 117 | |
b84056bf YZ |
118 | static void fcoe_get_lesb(struct fc_lport *, struct fc_els_lesb *); |
119 | ||
1875f27e RL |
120 | module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR); |
121 | __MODULE_PARM_TYPE(create, "string"); | |
55a66d3c | 122 | MODULE_PARM_DESC(create, " Creates fcoe instance on a ethernet interface"); |
1875f27e RL |
123 | module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR); |
124 | __MODULE_PARM_TYPE(destroy, "string"); | |
55a66d3c VD |
125 | MODULE_PARM_DESC(destroy, " Destroys fcoe instance on a ethernet interface"); |
126 | module_param_call(enable, fcoe_enable, NULL, NULL, S_IWUSR); | |
127 | __MODULE_PARM_TYPE(enable, "string"); | |
128 | MODULE_PARM_DESC(enable, " Enables fcoe on a ethernet interface."); | |
129 | module_param_call(disable, fcoe_disable, NULL, NULL, S_IWUSR); | |
130 | __MODULE_PARM_TYPE(disable, "string"); | |
131 | MODULE_PARM_DESC(disable, " Disables fcoe on a ethernet interface."); | |
1875f27e RL |
132 | |
133 | /* notification function for packets from net device */ | |
85b4aa49 RL |
134 | static struct notifier_block fcoe_notifier = { |
135 | .notifier_call = fcoe_device_notification, | |
136 | }; | |
137 | ||
1875f27e RL |
138 | /* notification function for CPU hotplug events */ |
139 | static struct notifier_block fcoe_cpu_notifier = { | |
140 | .notifier_call = fcoe_cpu_callback, | |
141 | }; | |
142 | ||
e9084bb8 CL |
143 | static struct scsi_transport_template *fcoe_transport_template; |
144 | static struct scsi_transport_template *fcoe_vport_transport_template; | |
7f349142 | 145 | |
1875f27e RL |
146 | static int fcoe_vport_destroy(struct fc_vport *); |
147 | static int fcoe_vport_create(struct fc_vport *, bool disabled); | |
148 | static int fcoe_vport_disable(struct fc_vport *, bool disable); | |
149 | static void fcoe_set_vport_symbolic_name(struct fc_vport *); | |
7d65b0df | 150 | static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *); |
1875f27e RL |
151 | |
152 | static struct libfc_function_template fcoe_libfc_fcn_templ = { | |
153 | .frame_send = fcoe_xmit, | |
154 | .ddp_setup = fcoe_ddp_setup, | |
155 | .ddp_done = fcoe_ddp_done, | |
156 | .elsct_send = fcoe_elsct_send, | |
b84056bf | 157 | .get_lesb = fcoe_get_lesb, |
7d65b0df | 158 | .lport_set_port_id = fcoe_set_port_id, |
1875f27e | 159 | }; |
9a05753b | 160 | |
7f349142 VD |
161 | struct fc_function_template fcoe_transport_function = { |
162 | .show_host_node_name = 1, | |
163 | .show_host_port_name = 1, | |
164 | .show_host_supported_classes = 1, | |
165 | .show_host_supported_fc4s = 1, | |
166 | .show_host_active_fc4s = 1, | |
167 | .show_host_maxframe_size = 1, | |
168 | ||
169 | .show_host_port_id = 1, | |
170 | .show_host_supported_speeds = 1, | |
171 | .get_host_speed = fc_get_host_speed, | |
172 | .show_host_speed = 1, | |
173 | .show_host_port_type = 1, | |
174 | .get_host_port_state = fc_get_host_port_state, | |
175 | .show_host_port_state = 1, | |
176 | .show_host_symbolic_name = 1, | |
177 | ||
178 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
179 | .show_rport_maxframe_size = 1, | |
180 | .show_rport_supported_classes = 1, | |
181 | ||
182 | .show_host_fabric_name = 1, | |
183 | .show_starget_node_name = 1, | |
184 | .show_starget_port_name = 1, | |
185 | .show_starget_port_id = 1, | |
186 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
187 | .show_rport_dev_loss_tmo = 1, | |
188 | .get_fc_host_stats = fc_get_host_stats, | |
189 | .issue_fc_host_lip = fcoe_reset, | |
190 | ||
191 | .terminate_rport_io = fc_rport_terminate_io, | |
9a05753b CL |
192 | |
193 | .vport_create = fcoe_vport_create, | |
194 | .vport_delete = fcoe_vport_destroy, | |
195 | .vport_disable = fcoe_vport_disable, | |
dc8596d3 | 196 | .set_vport_symbolic_name = fcoe_set_vport_symbolic_name, |
a51ab396 SM |
197 | |
198 | .bsg_request = fc_lport_bsg_request, | |
7f349142 VD |
199 | }; |
200 | ||
e9084bb8 CL |
201 | struct fc_function_template fcoe_vport_transport_function = { |
202 | .show_host_node_name = 1, | |
203 | .show_host_port_name = 1, | |
204 | .show_host_supported_classes = 1, | |
205 | .show_host_supported_fc4s = 1, | |
206 | .show_host_active_fc4s = 1, | |
207 | .show_host_maxframe_size = 1, | |
208 | ||
209 | .show_host_port_id = 1, | |
210 | .show_host_supported_speeds = 1, | |
211 | .get_host_speed = fc_get_host_speed, | |
212 | .show_host_speed = 1, | |
213 | .show_host_port_type = 1, | |
214 | .get_host_port_state = fc_get_host_port_state, | |
215 | .show_host_port_state = 1, | |
216 | .show_host_symbolic_name = 1, | |
217 | ||
218 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
219 | .show_rport_maxframe_size = 1, | |
220 | .show_rport_supported_classes = 1, | |
221 | ||
222 | .show_host_fabric_name = 1, | |
223 | .show_starget_node_name = 1, | |
224 | .show_starget_port_name = 1, | |
225 | .show_starget_port_id = 1, | |
226 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
227 | .show_rport_dev_loss_tmo = 1, | |
228 | .get_fc_host_stats = fc_get_host_stats, | |
229 | .issue_fc_host_lip = fcoe_reset, | |
230 | ||
231 | .terminate_rport_io = fc_rport_terminate_io, | |
a51ab396 SM |
232 | |
233 | .bsg_request = fc_lport_bsg_request, | |
e9084bb8 CL |
234 | }; |
235 | ||
7f349142 VD |
236 | static struct scsi_host_template fcoe_shost_template = { |
237 | .module = THIS_MODULE, | |
238 | .name = "FCoE Driver", | |
239 | .proc_name = FCOE_NAME, | |
240 | .queuecommand = fc_queuecommand, | |
241 | .eh_abort_handler = fc_eh_abort, | |
242 | .eh_device_reset_handler = fc_eh_device_reset, | |
243 | .eh_host_reset_handler = fc_eh_host_reset, | |
244 | .slave_alloc = fc_slave_alloc, | |
245 | .change_queue_depth = fc_change_queue_depth, | |
246 | .change_queue_type = fc_change_queue_type, | |
247 | .this_id = -1, | |
14caf44c | 248 | .cmd_per_lun = 3, |
7f349142 VD |
249 | .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, |
250 | .use_clustering = ENABLE_CLUSTERING, | |
251 | .sg_tablesize = SG_ALL, | |
252 | .max_sectors = 0xffff, | |
253 | }; | |
254 | ||
54b649f8 | 255 | /** |
1875f27e RL |
256 | * fcoe_interface_setup() - Setup a FCoE interface |
257 | * @fcoe: The new FCoE interface | |
258 | * @netdev: The net device that the fcoe interface is on | |
54b649f8 CL |
259 | * |
260 | * Returns : 0 for success | |
2e70e241 | 261 | * Locking: must be called with the RTNL mutex held |
54b649f8 CL |
262 | */ |
263 | static int fcoe_interface_setup(struct fcoe_interface *fcoe, | |
264 | struct net_device *netdev) | |
265 | { | |
266 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
267 | struct netdev_hw_addr *ha; | |
5bab87e6 | 268 | struct net_device *real_dev; |
54b649f8 | 269 | u8 flogi_maddr[ETH_ALEN]; |
b7a727f1 | 270 | const struct net_device_ops *ops; |
54b649f8 CL |
271 | |
272 | fcoe->netdev = netdev; | |
273 | ||
b7a727f1 YZ |
274 | /* Let LLD initialize for FCoE */ |
275 | ops = netdev->netdev_ops; | |
276 | if (ops->ndo_fcoe_enable) { | |
277 | if (ops->ndo_fcoe_enable(netdev)) | |
278 | FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE" | |
279 | " specific feature for LLD.\n"); | |
280 | } | |
281 | ||
54b649f8 CL |
282 | /* Do not support for bonding device */ |
283 | if ((netdev->priv_flags & IFF_MASTER_ALB) || | |
284 | (netdev->priv_flags & IFF_SLAVE_INACTIVE) || | |
285 | (netdev->priv_flags & IFF_MASTER_8023AD)) { | |
59d92516 | 286 | FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n"); |
54b649f8 CL |
287 | return -EOPNOTSUPP; |
288 | } | |
289 | ||
290 | /* look for SAN MAC address, if multiple SAN MACs exist, only | |
291 | * use the first one for SPMA */ | |
5bab87e6 YZ |
292 | real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ? |
293 | vlan_dev_real_dev(netdev) : netdev; | |
54b649f8 | 294 | rcu_read_lock(); |
5bab87e6 | 295 | for_each_dev_addr(real_dev, ha) { |
54b649f8 | 296 | if ((ha->type == NETDEV_HW_ADDR_T_SAN) && |
bf361707 | 297 | (is_valid_ether_addr(ha->addr))) { |
54b649f8 CL |
298 | memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); |
299 | fip->spma = 1; | |
300 | break; | |
301 | } | |
302 | } | |
303 | rcu_read_unlock(); | |
304 | ||
305 | /* setup Source Mac Address */ | |
306 | if (!fip->spma) | |
307 | memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); | |
308 | ||
309 | /* | |
310 | * Add FCoE MAC address as second unicast MAC address | |
311 | * or enter promiscuous mode if not capable of listening | |
312 | * for multiple unicast MACs. | |
313 | */ | |
54b649f8 CL |
314 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
315 | dev_unicast_add(netdev, flogi_maddr); | |
316 | if (fip->spma) | |
317 | dev_unicast_add(netdev, fip->ctl_src_addr); | |
318 | dev_mc_add(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0); | |
54b649f8 CL |
319 | |
320 | /* | |
321 | * setup the receive function from ethernet driver | |
322 | * on the ethertype for the given device | |
323 | */ | |
324 | fcoe->fcoe_packet_type.func = fcoe_rcv; | |
325 | fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE); | |
326 | fcoe->fcoe_packet_type.dev = netdev; | |
327 | dev_add_pack(&fcoe->fcoe_packet_type); | |
328 | ||
329 | fcoe->fip_packet_type.func = fcoe_fip_recv; | |
330 | fcoe->fip_packet_type.type = htons(ETH_P_FIP); | |
331 | fcoe->fip_packet_type.dev = netdev; | |
332 | dev_add_pack(&fcoe->fip_packet_type); | |
333 | ||
334 | return 0; | |
335 | } | |
336 | ||
030f4e00 | 337 | /** |
1875f27e RL |
338 | * fcoe_interface_create() - Create a FCoE interface on a net device |
339 | * @netdev: The net device to create the FCoE interface on | |
030f4e00 CL |
340 | * |
341 | * Returns: pointer to a struct fcoe_interface or NULL on error | |
342 | */ | |
343 | static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev) | |
344 | { | |
345 | struct fcoe_interface *fcoe; | |
59d92516 | 346 | int err; |
030f4e00 CL |
347 | |
348 | fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL); | |
349 | if (!fcoe) { | |
350 | FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n"); | |
351 | return NULL; | |
352 | } | |
353 | ||
2e70e241 | 354 | dev_hold(netdev); |
030f4e00 | 355 | kref_init(&fcoe->kref); |
54b649f8 CL |
356 | |
357 | /* | |
358 | * Initialize FIP. | |
359 | */ | |
360 | fcoe_ctlr_init(&fcoe->ctlr); | |
361 | fcoe->ctlr.send = fcoe_fip_send; | |
362 | fcoe->ctlr.update_mac = fcoe_update_src_mac; | |
11b56188 | 363 | fcoe->ctlr.get_src_addr = fcoe_get_src_mac; |
54b649f8 | 364 | |
59d92516 | 365 | err = fcoe_interface_setup(fcoe, netdev); |
366 | if (err) { | |
367 | fcoe_ctlr_destroy(&fcoe->ctlr); | |
368 | kfree(fcoe); | |
369 | dev_put(netdev); | |
370 | return NULL; | |
371 | } | |
030f4e00 CL |
372 | |
373 | return fcoe; | |
374 | } | |
375 | ||
54b649f8 | 376 | /** |
1875f27e RL |
377 | * fcoe_interface_cleanup() - Clean up a FCoE interface |
378 | * @fcoe: The FCoE interface to be cleaned up | |
2e70e241 CL |
379 | * |
380 | * Caller must be holding the RTNL mutex | |
54b649f8 CL |
381 | */ |
382 | void fcoe_interface_cleanup(struct fcoe_interface *fcoe) | |
383 | { | |
384 | struct net_device *netdev = fcoe->netdev; | |
385 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
386 | u8 flogi_maddr[ETH_ALEN]; | |
b7a727f1 | 387 | const struct net_device_ops *ops; |
54b649f8 CL |
388 | |
389 | /* | |
390 | * Don't listen for Ethernet packets anymore. | |
391 | * synchronize_net() ensures that the packet handlers are not running | |
392 | * on another CPU. dev_remove_pack() would do that, this calls the | |
393 | * unsyncronized version __dev_remove_pack() to avoid multiple delays. | |
394 | */ | |
395 | __dev_remove_pack(&fcoe->fcoe_packet_type); | |
396 | __dev_remove_pack(&fcoe->fip_packet_type); | |
397 | synchronize_net(); | |
398 | ||
54b649f8 | 399 | /* Delete secondary MAC addresses */ |
54b649f8 CL |
400 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
401 | dev_unicast_delete(netdev, flogi_maddr); | |
54b649f8 CL |
402 | if (fip->spma) |
403 | dev_unicast_delete(netdev, fip->ctl_src_addr); | |
404 | dev_mc_delete(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0); | |
b7a727f1 YZ |
405 | |
406 | /* Tell the LLD we are done w/ FCoE */ | |
407 | ops = netdev->netdev_ops; | |
408 | if (ops->ndo_fcoe_disable) { | |
409 | if (ops->ndo_fcoe_disable(netdev)) | |
410 | FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" | |
411 | " specific feature for LLD.\n"); | |
412 | } | |
54b649f8 CL |
413 | } |
414 | ||
030f4e00 CL |
415 | /** |
416 | * fcoe_interface_release() - fcoe_port kref release function | |
1875f27e | 417 | * @kref: Embedded reference count in an fcoe_interface struct |
030f4e00 CL |
418 | */ |
419 | static void fcoe_interface_release(struct kref *kref) | |
420 | { | |
421 | struct fcoe_interface *fcoe; | |
2e70e241 | 422 | struct net_device *netdev; |
030f4e00 CL |
423 | |
424 | fcoe = container_of(kref, struct fcoe_interface, kref); | |
2e70e241 CL |
425 | netdev = fcoe->netdev; |
426 | /* tear-down the FCoE controller */ | |
427 | fcoe_ctlr_destroy(&fcoe->ctlr); | |
030f4e00 | 428 | kfree(fcoe); |
2e70e241 | 429 | dev_put(netdev); |
030f4e00 CL |
430 | } |
431 | ||
432 | /** | |
1875f27e RL |
433 | * fcoe_interface_get() - Get a reference to a FCoE interface |
434 | * @fcoe: The FCoE interface to be held | |
030f4e00 CL |
435 | */ |
436 | static inline void fcoe_interface_get(struct fcoe_interface *fcoe) | |
437 | { | |
438 | kref_get(&fcoe->kref); | |
439 | } | |
440 | ||
441 | /** | |
1875f27e RL |
442 | * fcoe_interface_put() - Put a reference to a FCoE interface |
443 | * @fcoe: The FCoE interface to be released | |
030f4e00 CL |
444 | */ |
445 | static inline void fcoe_interface_put(struct fcoe_interface *fcoe) | |
446 | { | |
447 | kref_put(&fcoe->kref, fcoe_interface_release); | |
448 | } | |
449 | ||
ab6b85c1 | 450 | /** |
1875f27e RL |
451 | * fcoe_fip_recv() - Handler for received FIP frames |
452 | * @skb: The receive skb | |
453 | * @netdev: The associated net device | |
454 | * @ptype: The packet_type structure which was used to register this handler | |
455 | * @orig_dev: The original net_device the the skb was received on. | |
456 | * (in case dev is a bond) | |
ab6b85c1 VD |
457 | * |
458 | * Returns: 0 for success | |
459 | */ | |
1875f27e | 460 | static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, |
ab6b85c1 VD |
461 | struct packet_type *ptype, |
462 | struct net_device *orig_dev) | |
463 | { | |
259ad85d | 464 | struct fcoe_interface *fcoe; |
ab6b85c1 | 465 | |
259ad85d | 466 | fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); |
3fe9a0ba | 467 | fcoe_ctlr_recv(&fcoe->ctlr, skb); |
ab6b85c1 VD |
468 | return 0; |
469 | } | |
470 | ||
471 | /** | |
1875f27e RL |
472 | * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame |
473 | * @fip: The FCoE controller | |
474 | * @skb: The FIP packet to be sent | |
ab6b85c1 VD |
475 | */ |
476 | static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
477 | { | |
3fe9a0ba | 478 | skb->dev = fcoe_from_ctlr(fip)->netdev; |
ab6b85c1 VD |
479 | dev_queue_xmit(skb); |
480 | } | |
481 | ||
482 | /** | |
1875f27e RL |
483 | * fcoe_update_src_mac() - Update the Ethernet MAC filters |
484 | * @lport: The local port to update the source MAC on | |
485 | * @addr: Unicast MAC address to add | |
ab6b85c1 VD |
486 | * |
487 | * Remove any previously-set unicast MAC filter. | |
488 | * Add secondary FCoE MAC address filter for our OUI. | |
489 | */ | |
11b56188 | 490 | static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) |
ab6b85c1 | 491 | { |
11b56188 CL |
492 | struct fcoe_port *port = lport_priv(lport); |
493 | struct fcoe_interface *fcoe = port->fcoe; | |
25024989 | 494 | |
ab6b85c1 | 495 | rtnl_lock(); |
11b56188 CL |
496 | if (!is_zero_ether_addr(port->data_src_addr)) |
497 | dev_unicast_delete(fcoe->netdev, port->data_src_addr); | |
498 | if (!is_zero_ether_addr(addr)) | |
499 | dev_unicast_add(fcoe->netdev, addr); | |
500 | memcpy(port->data_src_addr, addr, ETH_ALEN); | |
ab6b85c1 VD |
501 | rtnl_unlock(); |
502 | } | |
503 | ||
11b56188 CL |
504 | /** |
505 | * fcoe_get_src_mac() - return the Ethernet source address for an lport | |
506 | * @lport: libfc lport | |
507 | */ | |
508 | static u8 *fcoe_get_src_mac(struct fc_lport *lport) | |
509 | { | |
510 | struct fcoe_port *port = lport_priv(lport); | |
511 | ||
512 | return port->data_src_addr; | |
513 | } | |
514 | ||
7f349142 | 515 | /** |
1875f27e RL |
516 | * fcoe_lport_config() - Set up a local port |
517 | * @lport: The local port to be setup | |
7f349142 VD |
518 | * |
519 | * Returns: 0 for success | |
520 | */ | |
1875f27e | 521 | static int fcoe_lport_config(struct fc_lport *lport) |
7f349142 | 522 | { |
1875f27e RL |
523 | lport->link_up = 0; |
524 | lport->qfull = 0; | |
525 | lport->max_retry_count = 3; | |
526 | lport->max_rport_retry_count = 3; | |
527 | lport->e_d_tov = 2 * 1000; /* FC-FS default */ | |
528 | lport->r_a_tov = 2 * 2 * 1000; | |
529 | lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | | |
530 | FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); | |
531 | lport->does_npiv = 1; | |
532 | ||
533 | fc_lport_init_stats(lport); | |
7f349142 VD |
534 | |
535 | /* lport fc_lport related configuration */ | |
1875f27e | 536 | fc_lport_config(lport); |
7f349142 VD |
537 | |
538 | /* offload related configuration */ | |
1875f27e RL |
539 | lport->crc_offload = 0; |
540 | lport->seq_offload = 0; | |
541 | lport->lro_enabled = 0; | |
542 | lport->lro_xid = 0; | |
543 | lport->lso_max = 0; | |
7f349142 VD |
544 | |
545 | return 0; | |
546 | } | |
547 | ||
1047f221 | 548 | /** |
1875f27e RL |
549 | * fcoe_queue_timer() - The fcoe queue timer |
550 | * @lport: The local port | |
1047f221 VD |
551 | * |
552 | * Calls fcoe_check_wait_queue on timeout | |
1047f221 | 553 | */ |
1875f27e | 554 | static void fcoe_queue_timer(ulong lport) |
1047f221 | 555 | { |
1875f27e | 556 | fcoe_check_wait_queue((struct fc_lport *)lport, NULL); |
1047f221 VD |
557 | } |
558 | ||
dcece412 YZ |
559 | /** |
560 | * fcoe_get_wwn() - Get the world wide name from LLD if it supports it | |
561 | * @netdev: the associated net device | |
562 | * @wwn: the output WWN | |
563 | * @type: the type of WWN (WWPN or WWNN) | |
564 | * | |
565 | * Returns: 0 for success | |
566 | */ | |
567 | static int fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type) | |
568 | { | |
569 | const struct net_device_ops *ops = netdev->netdev_ops; | |
570 | ||
571 | if (ops->ndo_fcoe_get_wwn) | |
572 | return ops->ndo_fcoe_get_wwn(netdev, wwn, type); | |
573 | return -EINVAL; | |
574 | } | |
575 | ||
7f349142 | 576 | /** |
1875f27e RL |
577 | * fcoe_netdev_config() - Set up net devive for SW FCoE |
578 | * @lport: The local port that is associated with the net device | |
579 | * @netdev: The associated net device | |
7f349142 | 580 | * |
1875f27e | 581 | * Must be called after fcoe_lport_config() as it will use local port mutex |
7f349142 | 582 | * |
1875f27e | 583 | * Returns: 0 for success |
7f349142 | 584 | */ |
1875f27e | 585 | static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) |
7f349142 VD |
586 | { |
587 | u32 mfs; | |
588 | u64 wwnn, wwpn; | |
25024989 | 589 | struct fcoe_interface *fcoe; |
014f5c3f | 590 | struct fcoe_port *port; |
cc0136c2 | 591 | int vid = 0; |
7f349142 VD |
592 | |
593 | /* Setup lport private data to point to fcoe softc */ | |
1875f27e | 594 | port = lport_priv(lport); |
25024989 | 595 | fcoe = port->fcoe; |
7f349142 VD |
596 | |
597 | /* | |
598 | * Determine max frame size based on underlying device and optional | |
599 | * user-configured limit. If the MFS is too low, fcoe_link_ok() | |
600 | * will return 0, so do this first. | |
601 | */ | |
7221d7e5 YZ |
602 | mfs = netdev->mtu; |
603 | if (netdev->features & NETIF_F_FCOE_MTU) { | |
604 | mfs = FCOE_MTU; | |
605 | FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); | |
606 | } | |
607 | mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); | |
1875f27e | 608 | if (fc_set_mfs(lport, mfs)) |
7f349142 VD |
609 | return -EINVAL; |
610 | ||
7f349142 | 611 | /* offload features support */ |
1d1b88dc | 612 | if (netdev->features & NETIF_F_SG) |
1875f27e | 613 | lport->sg_supp = 1; |
7f349142 | 614 | |
7f349142 | 615 | if (netdev->features & NETIF_F_FCOE_CRC) { |
1875f27e | 616 | lport->crc_offload = 1; |
d5488eb9 | 617 | FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); |
7f349142 | 618 | } |
7f349142 | 619 | if (netdev->features & NETIF_F_FSO) { |
1875f27e RL |
620 | lport->seq_offload = 1; |
621 | lport->lso_max = netdev->gso_max_size; | |
d5488eb9 | 622 | FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", |
1875f27e | 623 | lport->lso_max); |
7f349142 | 624 | } |
7f349142 | 625 | if (netdev->fcoe_ddp_xid) { |
1875f27e RL |
626 | lport->lro_enabled = 1; |
627 | lport->lro_xid = netdev->fcoe_ddp_xid; | |
d5488eb9 | 628 | FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", |
1875f27e | 629 | lport->lro_xid); |
7f349142 | 630 | } |
014f5c3f CL |
631 | skb_queue_head_init(&port->fcoe_pending_queue); |
632 | port->fcoe_pending_queue_active = 0; | |
1875f27e | 633 | setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport); |
7f349142 | 634 | |
5e4f8fe7 RL |
635 | fcoe_link_speed_update(lport); |
636 | ||
1875f27e | 637 | if (!lport->vport) { |
cc0136c2 YZ |
638 | /* |
639 | * Use NAA 1&2 (FC-FS Rev. 2.0, Sec. 15) to generate WWNN/WWPN: | |
640 | * For WWNN, we use NAA 1 w/ bit 27-16 of word 0 as 0. | |
641 | * For WWPN, we use NAA 2 w/ bit 27-16 of word 0 from VLAN ID | |
642 | */ | |
643 | if (netdev->priv_flags & IFF_802_1Q_VLAN) | |
644 | vid = vlan_dev_vlan_id(netdev); | |
dcece412 YZ |
645 | |
646 | if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN)) | |
647 | wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0); | |
1875f27e | 648 | fc_set_wwnn(lport, wwnn); |
dcece412 YZ |
649 | if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN)) |
650 | wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, | |
651 | 2, vid); | |
1875f27e | 652 | fc_set_wwpn(lport, wwpn); |
9a05753b | 653 | } |
7f349142 | 654 | |
7f349142 VD |
655 | return 0; |
656 | } | |
657 | ||
658 | /** | |
1875f27e RL |
659 | * fcoe_shost_config() - Set up the SCSI host associated with a local port |
660 | * @lport: The local port | |
1875f27e | 661 | * @dev: The device associated with the SCSI host |
7f349142 VD |
662 | * |
663 | * Must be called after fcoe_lport_config() and fcoe_netdev_config() | |
664 | * | |
1875f27e | 665 | * Returns: 0 for success |
7f349142 | 666 | */ |
8ba00a4b | 667 | static int fcoe_shost_config(struct fc_lport *lport, struct device *dev) |
7f349142 VD |
668 | { |
669 | int rc = 0; | |
670 | ||
671 | /* lport scsi host config */ | |
1875f27e RL |
672 | lport->host->max_lun = FCOE_MAX_LUN; |
673 | lport->host->max_id = FCOE_MAX_FCP_TARGET; | |
674 | lport->host->max_channel = 0; | |
da87bfab VD |
675 | lport->host->max_cmd_len = FCOE_MAX_CMD_LEN; |
676 | ||
1875f27e RL |
677 | if (lport->vport) |
678 | lport->host->transportt = fcoe_vport_transport_template; | |
e9084bb8 | 679 | else |
1875f27e | 680 | lport->host->transportt = fcoe_transport_template; |
7f349142 VD |
681 | |
682 | /* add the new host to the SCSI-ml */ | |
1875f27e | 683 | rc = scsi_add_host(lport->host, dev); |
7f349142 | 684 | if (rc) { |
1875f27e | 685 | FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " |
d5488eb9 | 686 | "error on scsi_add_host\n"); |
7f349142 VD |
687 | return rc; |
688 | } | |
9a05753b | 689 | |
1875f27e RL |
690 | if (!lport->vport) |
691 | fc_host_max_npiv_vports(lport->host) = USHORT_MAX; | |
9a05753b | 692 | |
1875f27e | 693 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, |
5baa17c3 | 694 | "%s v%s over %s", FCOE_NAME, FCOE_VERSION, |
1875f27e | 695 | fcoe_netdev(lport)->name); |
7f349142 VD |
696 | |
697 | return 0; | |
698 | } | |
699 | ||
1875f27e RL |
700 | /** |
701 | * fcoe_oem_match() - The match routine for the offloaded exchange manager | |
702 | * @fp: The I/O frame | |
d7179680 | 703 | * |
1875f27e RL |
704 | * This routine will be associated with an exchange manager (EM). When |
705 | * the libfc exchange handling code is looking for an EM to use it will | |
706 | * call this routine and pass it the frame that it wishes to send. This | |
707 | * routine will return True if the associated EM is to be used and False | |
708 | * if the echange code should continue looking for an EM. | |
709 | * | |
710 | * The offload EM that this routine is associated with will handle any | |
711 | * packets that are for SCSI read requests. | |
712 | * | |
713 | * Returns: True for read types I/O, otherwise returns false. | |
d7179680 VD |
714 | */ |
715 | bool fcoe_oem_match(struct fc_frame *fp) | |
716 | { | |
05cc7390 YZ |
717 | return fc_fcp_is_read(fr_fsp(fp)) && |
718 | (fr_fsp(fp)->data_len > fcoe_ddp_min); | |
d7179680 VD |
719 | } |
720 | ||
7f349142 | 721 | /** |
1875f27e RL |
722 | * fcoe_em_config() - Allocate and configure an exchange manager |
723 | * @lport: The local port that the new EM will be associated with | |
7f349142 | 724 | * |
1875f27e | 725 | * Returns: 0 on success |
7f349142 | 726 | */ |
1875f27e | 727 | static inline int fcoe_em_config(struct fc_lport *lport) |
7f349142 | 728 | { |
1875f27e | 729 | struct fcoe_port *port = lport_priv(lport); |
25024989 CL |
730 | struct fcoe_interface *fcoe = port->fcoe; |
731 | struct fcoe_interface *oldfcoe = NULL; | |
1d1b88dc | 732 | struct net_device *old_real_dev, *cur_real_dev; |
d7179680 VD |
733 | u16 min_xid = FCOE_MIN_XID; |
734 | u16 max_xid = FCOE_MAX_XID; | |
735 | ||
736 | /* | |
737 | * Check if need to allocate an em instance for | |
738 | * offload exchange ids to be shared across all VN_PORTs/lport. | |
739 | */ | |
1875f27e RL |
740 | if (!lport->lro_enabled || !lport->lro_xid || |
741 | (lport->lro_xid >= max_xid)) { | |
742 | lport->lro_xid = 0; | |
d7179680 VD |
743 | goto skip_oem; |
744 | } | |
745 | ||
746 | /* | |
747 | * Reuse existing offload em instance in case | |
1d1b88dc | 748 | * it is already allocated on real eth device |
d7179680 | 749 | */ |
25024989 CL |
750 | if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
751 | cur_real_dev = vlan_dev_real_dev(fcoe->netdev); | |
1d1b88dc | 752 | else |
25024989 | 753 | cur_real_dev = fcoe->netdev; |
1d1b88dc | 754 | |
25024989 | 755 | list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { |
25024989 CL |
756 | if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
757 | old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); | |
1d1b88dc | 758 | else |
25024989 | 759 | old_real_dev = oldfcoe->netdev; |
1d1b88dc VD |
760 | |
761 | if (cur_real_dev == old_real_dev) { | |
991cbb60 | 762 | fcoe->oem = oldfcoe->oem; |
d7179680 VD |
763 | break; |
764 | } | |
765 | } | |
766 | ||
991cbb60 | 767 | if (fcoe->oem) { |
1875f27e | 768 | if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { |
d7179680 VD |
769 | printk(KERN_ERR "fcoe_em_config: failed to add " |
770 | "offload em:%p on interface:%s\n", | |
991cbb60 | 771 | fcoe->oem, fcoe->netdev->name); |
d7179680 VD |
772 | return -ENOMEM; |
773 | } | |
774 | } else { | |
1875f27e RL |
775 | fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, |
776 | FCOE_MIN_XID, lport->lro_xid, | |
777 | fcoe_oem_match); | |
991cbb60 | 778 | if (!fcoe->oem) { |
d7179680 VD |
779 | printk(KERN_ERR "fcoe_em_config: failed to allocate " |
780 | "em for offload exches on interface:%s\n", | |
25024989 | 781 | fcoe->netdev->name); |
d7179680 VD |
782 | return -ENOMEM; |
783 | } | |
784 | } | |
785 | ||
786 | /* | |
787 | * Exclude offload EM xid range from next EM xid range. | |
788 | */ | |
1875f27e | 789 | min_xid += lport->lro_xid + 1; |
d7179680 VD |
790 | |
791 | skip_oem: | |
1875f27e | 792 | if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { |
d7179680 | 793 | printk(KERN_ERR "fcoe_em_config: failed to " |
25024989 | 794 | "allocate em on interface %s\n", fcoe->netdev->name); |
7f349142 | 795 | return -ENOMEM; |
d7179680 | 796 | } |
7f349142 VD |
797 | |
798 | return 0; | |
799 | } | |
800 | ||
801 | /** | |
1875f27e RL |
802 | * fcoe_if_destroy() - Tear down a SW FCoE instance |
803 | * @lport: The local port to be destroyed | |
7f349142 | 804 | */ |
af7f85d9 | 805 | static void fcoe_if_destroy(struct fc_lport *lport) |
7f349142 | 806 | { |
014f5c3f CL |
807 | struct fcoe_port *port = lport_priv(lport); |
808 | struct fcoe_interface *fcoe = port->fcoe; | |
25024989 | 809 | struct net_device *netdev = fcoe->netdev; |
7f349142 | 810 | |
d5488eb9 | 811 | FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); |
7f349142 | 812 | |
7f349142 | 813 | /* Logout of the fabric */ |
af7f85d9 | 814 | fc_fabric_logoff(lport); |
7f349142 | 815 | |
54b649f8 CL |
816 | /* Cleanup the fc_lport */ |
817 | fc_lport_destroy(lport); | |
818 | fc_fcp_destroy(lport); | |
819 | ||
820 | /* Stop the transmit retry timer */ | |
821 | del_timer_sync(&port->timer); | |
ab6b85c1 | 822 | |
54b649f8 CL |
823 | /* Free existing transmit skbs */ |
824 | fcoe_clean_pending_queue(lport); | |
825 | ||
11b56188 CL |
826 | rtnl_lock(); |
827 | if (!is_zero_ether_addr(port->data_src_addr)) | |
828 | dev_unicast_delete(netdev, port->data_src_addr); | |
829 | rtnl_unlock(); | |
830 | ||
54b649f8 CL |
831 | /* receives may not be stopped until after this */ |
832 | fcoe_interface_put(fcoe); | |
7f349142 | 833 | |
f161fb72 | 834 | /* Free queued packets for the per-CPU receive threads */ |
af7f85d9 | 835 | fcoe_percpu_clean(lport); |
f161fb72 | 836 | |
7f349142 | 837 | /* Detach from the scsi-ml */ |
af7f85d9 CL |
838 | fc_remove_host(lport->host); |
839 | scsi_remove_host(lport->host); | |
7f349142 VD |
840 | |
841 | /* There are no more rports or I/O, free the EM */ | |
af7f85d9 | 842 | fc_exch_mgr_free(lport); |
7f349142 | 843 | |
7f349142 | 844 | /* Free memory used by statistical counters */ |
af7f85d9 | 845 | fc_lport_free_stats(lport); |
7f349142 | 846 | |
2e70e241 | 847 | /* Release the Scsi_Host */ |
af7f85d9 | 848 | scsi_host_put(lport->host); |
7f349142 VD |
849 | } |
850 | ||
1875f27e RL |
851 | /** |
852 | * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device | |
853 | * @lport: The local port to setup DDP for | |
854 | * @xid: The exchange ID for this DDP transfer | |
855 | * @sgl: The scatterlist describing this transfer | |
856 | * @sgc: The number of sg items | |
7f349142 | 857 | * |
1875f27e | 858 | * Returns: 0 if the DDP context was not configured |
7f349142 | 859 | */ |
1875f27e RL |
860 | static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, |
861 | struct scatterlist *sgl, unsigned int sgc) | |
7f349142 | 862 | { |
1875f27e | 863 | struct net_device *netdev = fcoe_netdev(lport); |
7f349142 | 864 | |
1875f27e RL |
865 | if (netdev->netdev_ops->ndo_fcoe_ddp_setup) |
866 | return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, | |
867 | xid, sgl, | |
868 | sgc); | |
7f349142 VD |
869 | |
870 | return 0; | |
871 | } | |
872 | ||
1875f27e RL |
873 | /** |
874 | * fcoe_ddp_done() - Call a LLD's ddp_done through the net device | |
875 | * @lport: The local port to complete DDP on | |
876 | * @xid: The exchange ID for this DDP transfer | |
7f349142 | 877 | * |
1875f27e | 878 | * Returns: the length of data that have been completed by DDP |
7f349142 | 879 | */ |
1875f27e | 880 | static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) |
7f349142 | 881 | { |
1875f27e | 882 | struct net_device *netdev = fcoe_netdev(lport); |
7f349142 | 883 | |
1875f27e RL |
884 | if (netdev->netdev_ops->ndo_fcoe_ddp_done) |
885 | return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); | |
7f349142 VD |
886 | return 0; |
887 | } | |
888 | ||
7f349142 | 889 | /** |
1875f27e RL |
890 | * fcoe_if_create() - Create a FCoE instance on an interface |
891 | * @fcoe: The FCoE interface to create a local port on | |
892 | * @parent: The device pointer to be the parent in sysfs for the SCSI host | |
893 | * @npiv: Indicates if the port is a vport or not | |
7f349142 | 894 | * |
1875f27e | 895 | * Creates a fc_lport instance and a Scsi_Host instance and configure them. |
7f349142 | 896 | * |
1875f27e | 897 | * Returns: The allocated fc_lport or an error pointer |
7f349142 | 898 | */ |
030f4e00 | 899 | static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, |
9a05753b | 900 | struct device *parent, int npiv) |
7f349142 | 901 | { |
1875f27e | 902 | struct net_device *netdev = fcoe->netdev; |
af7f85d9 | 903 | struct fc_lport *lport = NULL; |
014f5c3f | 904 | struct fcoe_port *port; |
1875f27e | 905 | int rc; |
9a05753b CL |
906 | /* |
907 | * parent is only a vport if npiv is 1, | |
908 | * but we'll only use vport in that case so go ahead and set it | |
909 | */ | |
910 | struct fc_vport *vport = dev_to_vport(parent); | |
7f349142 | 911 | |
d5488eb9 | 912 | FCOE_NETDEV_DBG(netdev, "Create Interface\n"); |
7f349142 | 913 | |
9a05753b CL |
914 | if (!npiv) { |
915 | lport = libfc_host_alloc(&fcoe_shost_template, | |
916 | sizeof(struct fcoe_port)); | |
917 | } else { | |
918 | lport = libfc_vport_create(vport, | |
919 | sizeof(struct fcoe_port)); | |
920 | } | |
86221969 | 921 | if (!lport) { |
d5488eb9 | 922 | FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); |
af7f85d9 | 923 | rc = -ENOMEM; |
030f4e00 | 924 | goto out; |
7f349142 | 925 | } |
014f5c3f | 926 | port = lport_priv(lport); |
2e70e241 | 927 | port->lport = lport; |
014f5c3f | 928 | port->fcoe = fcoe; |
2e70e241 | 929 | INIT_WORK(&port->destroy_work, fcoe_destroy_work); |
7f349142 | 930 | |
1875f27e | 931 | /* configure a fc_lport including the exchange manager */ |
af7f85d9 | 932 | rc = fcoe_lport_config(lport); |
7f349142 | 933 | if (rc) { |
d5488eb9 RL |
934 | FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " |
935 | "interface\n"); | |
7f349142 VD |
936 | goto out_host_put; |
937 | } | |
938 | ||
9a05753b | 939 | if (npiv) { |
9f8f3aa6 CL |
940 | FCOE_NETDEV_DBG(netdev, "Setting vport names, " |
941 | "%16.16llx %16.16llx\n", | |
1875f27e | 942 | vport->node_name, vport->port_name); |
9a05753b CL |
943 | fc_set_wwnn(lport, vport->node_name); |
944 | fc_set_wwpn(lport, vport->port_name); | |
945 | } | |
946 | ||
ab6b85c1 | 947 | /* configure lport network properties */ |
af7f85d9 | 948 | rc = fcoe_netdev_config(lport, netdev); |
ab6b85c1 | 949 | if (rc) { |
d5488eb9 RL |
950 | FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " |
951 | "interface\n"); | |
54b649f8 | 952 | goto out_lp_destroy; |
ab6b85c1 | 953 | } |
97c8389d | 954 | |
7f349142 | 955 | /* configure lport scsi host properties */ |
8ba00a4b | 956 | rc = fcoe_shost_config(lport, parent); |
7f349142 | 957 | if (rc) { |
d5488eb9 RL |
958 | FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " |
959 | "interface\n"); | |
54b649f8 | 960 | goto out_lp_destroy; |
7f349142 VD |
961 | } |
962 | ||
96316099 | 963 | /* Initialize the library */ |
af7f85d9 | 964 | rc = fcoe_libfc_config(lport, &fcoe_libfc_fcn_templ); |
7f349142 | 965 | if (rc) { |
96316099 | 966 | FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " |
d5488eb9 | 967 | "interface\n"); |
96316099 | 968 | goto out_lp_destroy; |
7f349142 VD |
969 | } |
970 | ||
9a05753b CL |
971 | if (!npiv) { |
972 | /* | |
973 | * fcoe_em_alloc() and fcoe_hostlist_add() both | |
974 | * need to be atomic with respect to other changes to the | |
975 | * hostlist since fcoe_em_alloc() looks for an existing EM | |
976 | * instance on host list updated by fcoe_hostlist_add(). | |
977 | * | |
978 | * This is currently handled through the fcoe_config_mutex | |
979 | * begin held. | |
980 | */ | |
c863df33 | 981 | |
9a05753b CL |
982 | /* lport exch manager allocation */ |
983 | rc = fcoe_em_config(lport); | |
984 | if (rc) { | |
985 | FCOE_NETDEV_DBG(netdev, "Could not configure the EM " | |
1875f27e | 986 | "for the interface\n"); |
9a05753b CL |
987 | goto out_lp_destroy; |
988 | } | |
7f349142 VD |
989 | } |
990 | ||
030f4e00 | 991 | fcoe_interface_get(fcoe); |
af7f85d9 | 992 | return lport; |
7f349142 VD |
993 | |
994 | out_lp_destroy: | |
af7f85d9 | 995 | fc_exch_mgr_free(lport); |
7f349142 | 996 | out_host_put: |
af7f85d9 CL |
997 | scsi_host_put(lport->host); |
998 | out: | |
999 | return ERR_PTR(rc); | |
7f349142 VD |
1000 | } |
1001 | ||
1002 | /** | |
1875f27e | 1003 | * fcoe_if_init() - Initialization routine for fcoe.ko |
7f349142 | 1004 | * |
1875f27e RL |
1005 | * Attaches the SW FCoE transport to the FC transport |
1006 | * | |
1007 | * Returns: 0 on success | |
7f349142 VD |
1008 | */ |
1009 | static int __init fcoe_if_init(void) | |
1010 | { | |
1011 | /* attach to scsi transport */ | |
e9084bb8 CL |
1012 | fcoe_transport_template = fc_attach_transport(&fcoe_transport_function); |
1013 | fcoe_vport_transport_template = | |
1014 | fc_attach_transport(&fcoe_vport_transport_function); | |
7f349142 | 1015 | |
e9084bb8 | 1016 | if (!fcoe_transport_template) { |
d5488eb9 | 1017 | printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); |
7f349142 VD |
1018 | return -ENODEV; |
1019 | } | |
1020 | ||
1021 | return 0; | |
1022 | } | |
1023 | ||
1024 | /** | |
1875f27e RL |
1025 | * fcoe_if_exit() - Tear down fcoe.ko |
1026 | * | |
1027 | * Detaches the SW FCoE transport from the FC transport | |
7f349142 | 1028 | * |
1875f27e | 1029 | * Returns: 0 on success |
7f349142 VD |
1030 | */ |
1031 | int __exit fcoe_if_exit(void) | |
1032 | { | |
e9084bb8 CL |
1033 | fc_release_transport(fcoe_transport_template); |
1034 | fc_release_transport(fcoe_vport_transport_template); | |
1035 | fcoe_transport_template = NULL; | |
1036 | fcoe_vport_transport_template = NULL; | |
7f349142 VD |
1037 | return 0; |
1038 | } | |
1039 | ||
8976f424 | 1040 | /** |
1875f27e RL |
1041 | * fcoe_percpu_thread_create() - Create a receive thread for an online CPU |
1042 | * @cpu: The CPU index of the CPU to create a receive thread for | |
8976f424 RL |
1043 | */ |
1044 | static void fcoe_percpu_thread_create(unsigned int cpu) | |
1045 | { | |
1046 | struct fcoe_percpu_s *p; | |
1047 | struct task_struct *thread; | |
1048 | ||
1049 | p = &per_cpu(fcoe_percpu, cpu); | |
1050 | ||
1051 | thread = kthread_create(fcoe_percpu_receive_thread, | |
1052 | (void *)p, "fcoethread/%d", cpu); | |
1053 | ||
e7a51997 | 1054 | if (likely(!IS_ERR(thread))) { |
8976f424 RL |
1055 | kthread_bind(thread, cpu); |
1056 | wake_up_process(thread); | |
1057 | ||
1058 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1059 | p->thread = thread; | |
1060 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1061 | } | |
1062 | } | |
1063 | ||
1064 | /** | |
1875f27e RL |
1065 | * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU |
1066 | * @cpu: The CPU index of the CPU whose receive thread is to be destroyed | |
8976f424 RL |
1067 | * |
1068 | * Destroys a per-CPU Rx thread. Any pending skbs are moved to the | |
1069 | * current CPU's Rx thread. If the thread being destroyed is bound to | |
1070 | * the CPU processing this context the skbs will be freed. | |
1071 | */ | |
1072 | static void fcoe_percpu_thread_destroy(unsigned int cpu) | |
1073 | { | |
1074 | struct fcoe_percpu_s *p; | |
1075 | struct task_struct *thread; | |
1076 | struct page *crc_eof; | |
1077 | struct sk_buff *skb; | |
1078 | #ifdef CONFIG_SMP | |
1079 | struct fcoe_percpu_s *p0; | |
f018b73a | 1080 | unsigned targ_cpu = get_cpu(); |
8976f424 RL |
1081 | #endif /* CONFIG_SMP */ |
1082 | ||
d5488eb9 | 1083 | FCOE_DBG("Destroying receive thread for CPU %d\n", cpu); |
8976f424 RL |
1084 | |
1085 | /* Prevent any new skbs from being queued for this CPU. */ | |
1086 | p = &per_cpu(fcoe_percpu, cpu); | |
1087 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1088 | thread = p->thread; | |
1089 | p->thread = NULL; | |
1090 | crc_eof = p->crc_eof_page; | |
1091 | p->crc_eof_page = NULL; | |
1092 | p->crc_eof_offset = 0; | |
1093 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1094 | ||
1095 | #ifdef CONFIG_SMP | |
1096 | /* | |
1097 | * Don't bother moving the skb's if this context is running | |
1098 | * on the same CPU that is having its thread destroyed. This | |
1099 | * can easily happen when the module is removed. | |
1100 | */ | |
1101 | if (cpu != targ_cpu) { | |
1102 | p0 = &per_cpu(fcoe_percpu, targ_cpu); | |
1103 | spin_lock_bh(&p0->fcoe_rx_list.lock); | |
1104 | if (p0->thread) { | |
d5488eb9 RL |
1105 | FCOE_DBG("Moving frames from CPU %d to CPU %d\n", |
1106 | cpu, targ_cpu); | |
8976f424 RL |
1107 | |
1108 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1109 | __skb_queue_tail(&p0->fcoe_rx_list, skb); | |
1110 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
1111 | } else { | |
1112 | /* | |
1113 | * The targeted CPU is not initialized and cannot accept | |
1875f27e | 1114 | * new skbs. Unlock the targeted CPU and drop the skbs |
8976f424 RL |
1115 | * on the CPU that is going offline. |
1116 | */ | |
1117 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1118 | kfree_skb(skb); | |
1119 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
1120 | } | |
1121 | } else { | |
1122 | /* | |
1123 | * This scenario occurs when the module is being removed | |
1124 | * and all threads are being destroyed. skbs will continue | |
1125 | * to be shifted from the CPU thread that is being removed | |
1126 | * to the CPU thread associated with the CPU that is processing | |
1127 | * the module removal. Once there is only one CPU Rx thread it | |
1128 | * will reach this case and we will drop all skbs and later | |
1129 | * stop the thread. | |
1130 | */ | |
1131 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1132 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1133 | kfree_skb(skb); | |
1134 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1135 | } | |
f018b73a | 1136 | put_cpu(); |
8976f424 RL |
1137 | #else |
1138 | /* | |
dd3fd72e | 1139 | * This a non-SMP scenario where the singular Rx thread is |
8976f424 RL |
1140 | * being removed. Free all skbs and stop the thread. |
1141 | */ | |
1142 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1143 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1144 | kfree_skb(skb); | |
1145 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1146 | #endif | |
1147 | ||
1148 | if (thread) | |
1149 | kthread_stop(thread); | |
1150 | ||
1151 | if (crc_eof) | |
1152 | put_page(crc_eof); | |
1153 | } | |
1154 | ||
1155 | /** | |
1875f27e RL |
1156 | * fcoe_cpu_callback() - Handler for CPU hotplug events |
1157 | * @nfb: The callback data block | |
1158 | * @action: The event triggering the callback | |
1159 | * @hcpu: The index of the CPU that the event is for | |
8976f424 | 1160 | * |
1875f27e | 1161 | * This creates or destroys per-CPU data for fcoe |
8976f424 RL |
1162 | * |
1163 | * Returns NOTIFY_OK always. | |
1164 | */ | |
1165 | static int fcoe_cpu_callback(struct notifier_block *nfb, | |
1166 | unsigned long action, void *hcpu) | |
1167 | { | |
1168 | unsigned cpu = (unsigned long)hcpu; | |
1169 | ||
1170 | switch (action) { | |
1171 | case CPU_ONLINE: | |
1172 | case CPU_ONLINE_FROZEN: | |
d5488eb9 | 1173 | FCOE_DBG("CPU %x online: Create Rx thread\n", cpu); |
8976f424 RL |
1174 | fcoe_percpu_thread_create(cpu); |
1175 | break; | |
1176 | case CPU_DEAD: | |
1177 | case CPU_DEAD_FROZEN: | |
d5488eb9 | 1178 | FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu); |
8976f424 RL |
1179 | fcoe_percpu_thread_destroy(cpu); |
1180 | break; | |
1181 | default: | |
1182 | break; | |
1183 | } | |
1184 | return NOTIFY_OK; | |
1185 | } | |
1186 | ||
85b4aa49 | 1187 | /** |
1875f27e RL |
1188 | * fcoe_rcv() - Receive packets from a net device |
1189 | * @skb: The received packet | |
1190 | * @netdev: The net device that the packet was received on | |
1191 | * @ptype: The packet type context | |
1192 | * @olddev: The last device net device | |
85b4aa49 | 1193 | * |
1875f27e RL |
1194 | * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a |
1195 | * FC frame and passes the frame to libfc. | |
85b4aa49 RL |
1196 | * |
1197 | * Returns: 0 for success | |
34f42a07 | 1198 | */ |
1875f27e | 1199 | int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, |
85b4aa49 RL |
1200 | struct packet_type *ptype, struct net_device *olddev) |
1201 | { | |
1875f27e | 1202 | struct fc_lport *lport; |
85b4aa49 | 1203 | struct fcoe_rcv_info *fr; |
259ad85d | 1204 | struct fcoe_interface *fcoe; |
85b4aa49 | 1205 | struct fc_frame_header *fh; |
85b4aa49 | 1206 | struct fcoe_percpu_s *fps; |
b2f0091f | 1207 | unsigned int cpu; |
85b4aa49 | 1208 | |
259ad85d | 1209 | fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); |
1875f27e RL |
1210 | lport = fcoe->ctlr.lp; |
1211 | if (unlikely(!lport)) { | |
1212 | FCOE_NETDEV_DBG(netdev, "Cannot find hba structure"); | |
85b4aa49 RL |
1213 | goto err2; |
1214 | } | |
1875f27e | 1215 | if (!lport->link_up) |
97c8389d | 1216 | goto err2; |
85b4aa49 | 1217 | |
1875f27e | 1218 | FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p " |
d5488eb9 RL |
1219 | "data:%p tail:%p end:%p sum:%d dev:%s", |
1220 | skb->len, skb->data_len, skb->head, skb->data, | |
1221 | skb_tail_pointer(skb), skb_end_pointer(skb), | |
1222 | skb->csum, skb->dev ? skb->dev->name : "<NULL>"); | |
85b4aa49 RL |
1223 | |
1224 | /* check for FCOE packet type */ | |
1225 | if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) { | |
1875f27e | 1226 | FCOE_NETDEV_DBG(netdev, "Wrong FC type frame"); |
85b4aa49 RL |
1227 | goto err; |
1228 | } | |
1229 | ||
1230 | /* | |
1231 | * Check for minimum frame length, and make sure required FCoE | |
1232 | * and FC headers are pulled into the linear data area. | |
1233 | */ | |
1234 | if (unlikely((skb->len < FCOE_MIN_FRAME) || | |
1875f27e | 1235 | !pskb_may_pull(skb, FCOE_HEADER_LEN))) |
85b4aa49 RL |
1236 | goto err; |
1237 | ||
1238 | skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); | |
1239 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1240 | ||
85b4aa49 | 1241 | fr = fcoe_dev_from_skb(skb); |
1875f27e | 1242 | fr->fr_dev = lport; |
85b4aa49 | 1243 | fr->ptype = ptype; |
5e5e92df | 1244 | |
85b4aa49 | 1245 | /* |
b2f0091f VD |
1246 | * In case the incoming frame's exchange is originated from |
1247 | * the initiator, then received frame's exchange id is ANDed | |
1248 | * with fc_cpu_mask bits to get the same cpu on which exchange | |
1249 | * was originated, otherwise just use the current cpu. | |
85b4aa49 | 1250 | */ |
b2f0091f VD |
1251 | if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) |
1252 | cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; | |
1253 | else | |
1254 | cpu = smp_processor_id(); | |
5e5e92df | 1255 | |
8976f424 | 1256 | fps = &per_cpu(fcoe_percpu, cpu); |
85b4aa49 | 1257 | spin_lock_bh(&fps->fcoe_rx_list.lock); |
8976f424 RL |
1258 | if (unlikely(!fps->thread)) { |
1259 | /* | |
1260 | * The targeted CPU is not ready, let's target | |
1261 | * the first CPU now. For non-SMP systems this | |
1262 | * will check the same CPU twice. | |
1263 | */ | |
1875f27e | 1264 | FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread " |
d5488eb9 RL |
1265 | "ready for incoming skb- using first online " |
1266 | "CPU.\n"); | |
8976f424 RL |
1267 | |
1268 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
6957177f | 1269 | cpu = cpumask_first(cpu_online_mask); |
8976f424 RL |
1270 | fps = &per_cpu(fcoe_percpu, cpu); |
1271 | spin_lock_bh(&fps->fcoe_rx_list.lock); | |
1272 | if (!fps->thread) { | |
1273 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1274 | goto err; | |
1275 | } | |
1276 | } | |
1277 | ||
1278 | /* | |
1279 | * We now have a valid CPU that we're targeting for | |
1280 | * this skb. We also have this receive thread locked, | |
1281 | * so we're free to queue skbs into it's queue. | |
1282 | */ | |
85b4aa49 | 1283 | |
859b7b64 CL |
1284 | /* If this is a SCSI-FCP frame, and this is already executing on the |
1285 | * correct CPU, and the queue for this CPU is empty, then go ahead | |
1286 | * and process the frame directly in the softirq context. | |
1287 | * This lets us process completions without context switching from the | |
1288 | * NET_RX softirq, to our receive processing thread, and then back to | |
1289 | * BLOCK softirq context. | |
1290 | */ | |
1291 | if (fh->fh_type == FC_TYPE_FCP && | |
1292 | cpu == smp_processor_id() && | |
1293 | skb_queue_empty(&fps->fcoe_rx_list)) { | |
1294 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1295 | fcoe_recv_frame(skb); | |
1296 | } else { | |
1297 | __skb_queue_tail(&fps->fcoe_rx_list, skb); | |
1298 | if (fps->fcoe_rx_list.qlen == 1) | |
1299 | wake_up_process(fps->thread); | |
1300 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1301 | } | |
85b4aa49 RL |
1302 | |
1303 | return 0; | |
1304 | err: | |
f018b73a JE |
1305 | per_cpu_ptr(lport->dev_stats, get_cpu())->ErrorFrames++; |
1306 | put_cpu(); | |
85b4aa49 RL |
1307 | err2: |
1308 | kfree_skb(skb); | |
1309 | return -1; | |
1310 | } | |
85b4aa49 RL |
1311 | |
1312 | /** | |
1875f27e RL |
1313 | * fcoe_start_io() - Start FCoE I/O |
1314 | * @skb: The packet to be transmitted | |
1315 | * | |
1316 | * This routine is called from the net device to start transmitting | |
1317 | * FCoE packets. | |
85b4aa49 RL |
1318 | * |
1319 | * Returns: 0 for success | |
34f42a07 | 1320 | */ |
85b4aa49 RL |
1321 | static inline int fcoe_start_io(struct sk_buff *skb) |
1322 | { | |
18fa11ef | 1323 | struct sk_buff *nskb; |
85b4aa49 RL |
1324 | int rc; |
1325 | ||
18fa11ef CL |
1326 | nskb = skb_clone(skb, GFP_ATOMIC); |
1327 | rc = dev_queue_xmit(nskb); | |
85b4aa49 RL |
1328 | if (rc != 0) |
1329 | return rc; | |
1330 | kfree_skb(skb); | |
1331 | return 0; | |
1332 | } | |
1333 | ||
1334 | /** | |
1875f27e RL |
1335 | * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC |
1336 | * @skb: The packet to be transmitted | |
1337 | * @tlen: The total length of the trailer | |
1338 | * | |
1339 | * This routine allocates a page for frame trailers. The page is re-used if | |
1340 | * there is enough room left on it for the current trailer. If there isn't | |
1341 | * enough buffer left a new page is allocated for the trailer. Reference to | |
1342 | * the page from this function as well as the skbs using the page fragments | |
1343 | * ensure that the page is freed at the appropriate time. | |
85b4aa49 RL |
1344 | * |
1345 | * Returns: 0 for success | |
34f42a07 | 1346 | */ |
85b4aa49 RL |
1347 | static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen) |
1348 | { | |
1349 | struct fcoe_percpu_s *fps; | |
1350 | struct page *page; | |
85b4aa49 | 1351 | |
5e5e92df | 1352 | fps = &get_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1353 | page = fps->crc_eof_page; |
1354 | if (!page) { | |
1355 | page = alloc_page(GFP_ATOMIC); | |
1356 | if (!page) { | |
5e5e92df | 1357 | put_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1358 | return -ENOMEM; |
1359 | } | |
1360 | fps->crc_eof_page = page; | |
8976f424 | 1361 | fps->crc_eof_offset = 0; |
85b4aa49 RL |
1362 | } |
1363 | ||
1364 | get_page(page); | |
1365 | skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page, | |
1366 | fps->crc_eof_offset, tlen); | |
1367 | skb->len += tlen; | |
1368 | skb->data_len += tlen; | |
1369 | skb->truesize += tlen; | |
1370 | fps->crc_eof_offset += sizeof(struct fcoe_crc_eof); | |
1371 | ||
1372 | if (fps->crc_eof_offset >= PAGE_SIZE) { | |
1373 | fps->crc_eof_page = NULL; | |
1374 | fps->crc_eof_offset = 0; | |
1375 | put_page(page); | |
1376 | } | |
5e5e92df | 1377 | put_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1378 | return 0; |
1379 | } | |
1380 | ||
1381 | /** | |
1875f27e RL |
1382 | * fcoe_fc_crc() - Calculates the CRC for a given frame |
1383 | * @fp: The frame to be checksumed | |
85b4aa49 | 1384 | * |
1875f27e RL |
1385 | * This uses crc32() routine to calculate the CRC for a frame |
1386 | * | |
1387 | * Return: The 32 bit CRC value | |
34f42a07 | 1388 | */ |
85b4aa49 RL |
1389 | u32 fcoe_fc_crc(struct fc_frame *fp) |
1390 | { | |
1391 | struct sk_buff *skb = fp_skb(fp); | |
1392 | struct skb_frag_struct *frag; | |
1393 | unsigned char *data; | |
1394 | unsigned long off, len, clen; | |
1395 | u32 crc; | |
1396 | unsigned i; | |
1397 | ||
1398 | crc = crc32(~0, skb->data, skb_headlen(skb)); | |
1399 | ||
1400 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1401 | frag = &skb_shinfo(skb)->frags[i]; | |
1402 | off = frag->page_offset; | |
1403 | len = frag->size; | |
1404 | while (len > 0) { | |
1405 | clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK)); | |
1406 | data = kmap_atomic(frag->page + (off >> PAGE_SHIFT), | |
1407 | KM_SKB_DATA_SOFTIRQ); | |
1408 | crc = crc32(crc, data + (off & ~PAGE_MASK), clen); | |
1409 | kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ); | |
1410 | off += clen; | |
1411 | len -= clen; | |
1412 | } | |
1413 | } | |
1414 | return crc; | |
1415 | } | |
85b4aa49 RL |
1416 | |
1417 | /** | |
1875f27e RL |
1418 | * fcoe_xmit() - Transmit a FCoE frame |
1419 | * @lport: The local port that the frame is to be transmitted for | |
1420 | * @fp: The frame to be transmitted | |
85b4aa49 | 1421 | * |
1875f27e | 1422 | * Return: 0 for success |
34f42a07 | 1423 | */ |
1875f27e | 1424 | int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) |
85b4aa49 | 1425 | { |
4bb6b515 | 1426 | int wlen; |
85b4aa49 RL |
1427 | u32 crc; |
1428 | struct ethhdr *eh; | |
1429 | struct fcoe_crc_eof *cp; | |
1430 | struct sk_buff *skb; | |
1431 | struct fcoe_dev_stats *stats; | |
1432 | struct fc_frame_header *fh; | |
1433 | unsigned int hlen; /* header length implies the version */ | |
1434 | unsigned int tlen; /* trailer length */ | |
1435 | unsigned int elen; /* eth header, may include vlan */ | |
1875f27e | 1436 | struct fcoe_port *port = lport_priv(lport); |
3fe9a0ba | 1437 | struct fcoe_interface *fcoe = port->fcoe; |
85b4aa49 RL |
1438 | u8 sof, eof; |
1439 | struct fcoe_hdr *hp; | |
1440 | ||
1441 | WARN_ON((fr_len(fp) % sizeof(u32)) != 0); | |
1442 | ||
85b4aa49 | 1443 | fh = fc_frame_header_get(fp); |
97c8389d JE |
1444 | skb = fp_skb(fp); |
1445 | wlen = skb->len / FCOE_WORD_TO_BYTE; | |
1446 | ||
1875f27e | 1447 | if (!lport->link_up) { |
3caf02ee | 1448 | kfree_skb(skb); |
97c8389d | 1449 | return 0; |
85b4aa49 RL |
1450 | } |
1451 | ||
9860eeb4 | 1452 | if (unlikely(fh->fh_type == FC_TYPE_ELS) && |
1875f27e | 1453 | fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb)) |
97c8389d JE |
1454 | return 0; |
1455 | ||
85b4aa49 RL |
1456 | sof = fr_sof(fp); |
1457 | eof = fr_eof(fp); | |
1458 | ||
4e57e1cb | 1459 | elen = sizeof(struct ethhdr); |
85b4aa49 RL |
1460 | hlen = sizeof(struct fcoe_hdr); |
1461 | tlen = sizeof(struct fcoe_crc_eof); | |
1462 | wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; | |
1463 | ||
1464 | /* crc offload */ | |
1875f27e | 1465 | if (likely(lport->crc_offload)) { |
39ca9a06 | 1466 | skb->ip_summed = CHECKSUM_PARTIAL; |
85b4aa49 RL |
1467 | skb->csum_start = skb_headroom(skb); |
1468 | skb->csum_offset = skb->len; | |
1469 | crc = 0; | |
1470 | } else { | |
1471 | skb->ip_summed = CHECKSUM_NONE; | |
1472 | crc = fcoe_fc_crc(fp); | |
1473 | } | |
1474 | ||
014f5c3f | 1475 | /* copy port crc and eof to the skb buff */ |
85b4aa49 RL |
1476 | if (skb_is_nonlinear(skb)) { |
1477 | skb_frag_t *frag; | |
1478 | if (fcoe_get_paged_crc_eof(skb, tlen)) { | |
e9041581 | 1479 | kfree_skb(skb); |
85b4aa49 RL |
1480 | return -ENOMEM; |
1481 | } | |
1482 | frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; | |
1483 | cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ) | |
1484 | + frag->page_offset; | |
1485 | } else { | |
1486 | cp = (struct fcoe_crc_eof *)skb_put(skb, tlen); | |
1487 | } | |
1488 | ||
1489 | memset(cp, 0, sizeof(*cp)); | |
1490 | cp->fcoe_eof = eof; | |
1491 | cp->fcoe_crc32 = cpu_to_le32(~crc); | |
1492 | ||
1493 | if (skb_is_nonlinear(skb)) { | |
1494 | kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ); | |
1495 | cp = NULL; | |
1496 | } | |
1497 | ||
014f5c3f | 1498 | /* adjust skb network/transport offsets to match mac/fcoe/port */ |
85b4aa49 RL |
1499 | skb_push(skb, elen + hlen); |
1500 | skb_reset_mac_header(skb); | |
1501 | skb_reset_network_header(skb); | |
1502 | skb->mac_len = elen; | |
211c738d | 1503 | skb->protocol = htons(ETH_P_FCOE); |
3fe9a0ba | 1504 | skb->dev = fcoe->netdev; |
85b4aa49 RL |
1505 | |
1506 | /* fill up mac and fcoe headers */ | |
1507 | eh = eth_hdr(skb); | |
1508 | eh->h_proto = htons(ETH_P_FCOE); | |
3fe9a0ba | 1509 | if (fcoe->ctlr.map_dest) |
85b4aa49 RL |
1510 | fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id); |
1511 | else | |
1512 | /* insert GW address */ | |
3fe9a0ba | 1513 | memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN); |
85b4aa49 | 1514 | |
3fe9a0ba CL |
1515 | if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN)) |
1516 | memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN); | |
85b4aa49 | 1517 | else |
11b56188 | 1518 | memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); |
85b4aa49 RL |
1519 | |
1520 | hp = (struct fcoe_hdr *)(eh + 1); | |
1521 | memset(hp, 0, sizeof(*hp)); | |
1522 | if (FC_FCOE_VER) | |
1523 | FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); | |
1524 | hp->fcoe_sof = sof; | |
1525 | ||
39ca9a06 | 1526 | /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ |
1875f27e | 1527 | if (lport->seq_offload && fr_max_payload(fp)) { |
39ca9a06 YZ |
1528 | skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; |
1529 | skb_shinfo(skb)->gso_size = fr_max_payload(fp); | |
1530 | } else { | |
1531 | skb_shinfo(skb)->gso_type = 0; | |
1532 | skb_shinfo(skb)->gso_size = 0; | |
1533 | } | |
85b4aa49 | 1534 | /* update tx stats: regardless if LLD fails */ |
f018b73a | 1535 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); |
582b45bc RL |
1536 | stats->TxFrames++; |
1537 | stats->TxWords += wlen; | |
f018b73a | 1538 | put_cpu(); |
85b4aa49 RL |
1539 | |
1540 | /* send down to lld */ | |
1875f27e | 1541 | fr_dev(fp) = lport; |
014f5c3f | 1542 | if (port->fcoe_pending_queue.qlen) |
1875f27e | 1543 | fcoe_check_wait_queue(lport, skb); |
4bb6b515 | 1544 | else if (fcoe_start_io(skb)) |
1875f27e | 1545 | fcoe_check_wait_queue(lport, skb); |
85b4aa49 RL |
1546 | |
1547 | return 0; | |
1548 | } | |
85b4aa49 | 1549 | |
e7a51997 | 1550 | /** |
1875f27e RL |
1551 | * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion |
1552 | * @skb: The completed skb (argument required by destructor) | |
e7a51997 JE |
1553 | */ |
1554 | static void fcoe_percpu_flush_done(struct sk_buff *skb) | |
1555 | { | |
1556 | complete(&fcoe_flush_completion); | |
1557 | } | |
1558 | ||
34f42a07 | 1559 | /** |
859b7b64 CL |
1560 | * fcoe_recv_frame() - process a single received frame |
1561 | * @skb: frame to process | |
85b4aa49 | 1562 | */ |
859b7b64 | 1563 | static void fcoe_recv_frame(struct sk_buff *skb) |
85b4aa49 | 1564 | { |
85b4aa49 | 1565 | u32 fr_len; |
1875f27e | 1566 | struct fc_lport *lport; |
85b4aa49 RL |
1567 | struct fcoe_rcv_info *fr; |
1568 | struct fcoe_dev_stats *stats; | |
1569 | struct fc_frame_header *fh; | |
85b4aa49 RL |
1570 | struct fcoe_crc_eof crc_eof; |
1571 | struct fc_frame *fp; | |
014f5c3f | 1572 | struct fcoe_port *port; |
85b4aa49 RL |
1573 | struct fcoe_hdr *hp; |
1574 | ||
859b7b64 CL |
1575 | fr = fcoe_dev_from_skb(skb); |
1576 | lport = fr->fr_dev; | |
1577 | if (unlikely(!lport)) { | |
1578 | if (skb->destructor != fcoe_percpu_flush_done) | |
1579 | FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb"); | |
1580 | kfree_skb(skb); | |
1581 | return; | |
1582 | } | |
1583 | ||
1584 | FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d " | |
1585 | "head:%p data:%p tail:%p end:%p sum:%d dev:%s", | |
1586 | skb->len, skb->data_len, | |
1587 | skb->head, skb->data, skb_tail_pointer(skb), | |
1588 | skb_end_pointer(skb), skb->csum, | |
1589 | skb->dev ? skb->dev->name : "<NULL>"); | |
1590 | ||
859b7b64 CL |
1591 | port = lport_priv(lport); |
1592 | if (skb_is_nonlinear(skb)) | |
1593 | skb_linearize(skb); /* not ideal */ | |
859b7b64 CL |
1594 | |
1595 | /* | |
1596 | * Frame length checks and setting up the header pointers | |
1597 | * was done in fcoe_rcv already. | |
1598 | */ | |
1599 | hp = (struct fcoe_hdr *) skb_network_header(skb); | |
1600 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1601 | ||
f018b73a | 1602 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); |
859b7b64 CL |
1603 | if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { |
1604 | if (stats->ErrorFrames < 5) | |
1605 | printk(KERN_WARNING "fcoe: FCoE version " | |
1606 | "mismatch: The frame has " | |
1607 | "version %x, but the " | |
1608 | "initiator supports version " | |
1609 | "%x\n", FC_FCOE_DECAPS_VER(hp), | |
1610 | FC_FCOE_VER); | |
f018b73a | 1611 | goto drop; |
859b7b64 CL |
1612 | } |
1613 | ||
1614 | skb_pull(skb, sizeof(struct fcoe_hdr)); | |
1615 | fr_len = skb->len - sizeof(struct fcoe_crc_eof); | |
1616 | ||
1617 | stats->RxFrames++; | |
1618 | stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; | |
1619 | ||
1620 | fp = (struct fc_frame *)skb; | |
1621 | fc_frame_init(fp); | |
1622 | fr_dev(fp) = lport; | |
1623 | fr_sof(fp) = hp->fcoe_sof; | |
1624 | ||
1625 | /* Copy out the CRC and EOF trailer for access */ | |
f018b73a JE |
1626 | if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) |
1627 | goto drop; | |
859b7b64 CL |
1628 | fr_eof(fp) = crc_eof.fcoe_eof; |
1629 | fr_crc(fp) = crc_eof.fcoe_crc32; | |
f018b73a JE |
1630 | if (pskb_trim(skb, fr_len)) |
1631 | goto drop; | |
859b7b64 CL |
1632 | |
1633 | /* | |
1634 | * We only check CRC if no offload is available and if it is | |
1635 | * it's solicited data, in which case, the FCP layer would | |
1636 | * check it during the copy. | |
1637 | */ | |
1638 | if (lport->crc_offload && | |
1639 | skb->ip_summed == CHECKSUM_UNNECESSARY) | |
1640 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; | |
1641 | else | |
1642 | fr_flags(fp) |= FCPHF_CRC_UNCHECKED; | |
1643 | ||
1644 | fh = fc_frame_header_get(fp); | |
f018b73a JE |
1645 | if ((fh->fh_r_ctl != FC_RCTL_DD_SOL_DATA || |
1646 | fh->fh_type != FC_TYPE_FCP) && | |
1647 | (fr_flags(fp) & FCPHF_CRC_UNCHECKED)) { | |
859b7b64 CL |
1648 | if (le32_to_cpu(fr_crc(fp)) != |
1649 | ~crc32(~0, skb->data, fr_len)) { | |
1650 | if (stats->InvalidCRCCount < 5) | |
1651 | printk(KERN_WARNING "fcoe: dropping " | |
1652 | "frame with CRC error\n"); | |
1653 | stats->InvalidCRCCount++; | |
f018b73a | 1654 | goto drop; |
859b7b64 CL |
1655 | } |
1656 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; | |
1657 | } | |
f018b73a | 1658 | put_cpu(); |
859b7b64 | 1659 | fc_exch_recv(lport, fp); |
f018b73a JE |
1660 | return; |
1661 | ||
1662 | drop: | |
1663 | stats->ErrorFrames++; | |
1664 | put_cpu(); | |
1665 | kfree_skb(skb); | |
859b7b64 CL |
1666 | } |
1667 | ||
1668 | /** | |
1669 | * fcoe_percpu_receive_thread() - The per-CPU packet receive thread | |
1670 | * @arg: The per-CPU context | |
1671 | * | |
1672 | * Return: 0 for success | |
1673 | */ | |
1674 | int fcoe_percpu_receive_thread(void *arg) | |
1675 | { | |
1676 | struct fcoe_percpu_s *p = arg; | |
1677 | struct sk_buff *skb; | |
1678 | ||
4469c195 | 1679 | set_user_nice(current, -20); |
85b4aa49 RL |
1680 | |
1681 | while (!kthread_should_stop()) { | |
1682 | ||
1683 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1684 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) { | |
1685 | set_current_state(TASK_INTERRUPTIBLE); | |
1686 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1687 | schedule(); | |
1688 | set_current_state(TASK_RUNNING); | |
1689 | if (kthread_should_stop()) | |
1690 | return 0; | |
1691 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1692 | } | |
1693 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
859b7b64 | 1694 | fcoe_recv_frame(skb); |
85b4aa49 RL |
1695 | } |
1696 | return 0; | |
1697 | } | |
1698 | ||
85b4aa49 | 1699 | /** |
1875f27e RL |
1700 | * fcoe_check_wait_queue() - Attempt to clear the transmit backlog |
1701 | * @lport: The local port whose backlog is to be cleared | |
85b4aa49 | 1702 | * |
1875f27e RL |
1703 | * This empties the wait_queue, dequeues the head of the wait_queue queue |
1704 | * and calls fcoe_start_io() for each packet. If all skb have been | |
1705 | * transmitted it returns the qlen. If an error occurs it restores | |
1706 | * wait_queue (to try again later) and returns -1. | |
85b4aa49 | 1707 | * |
1875f27e RL |
1708 | * The wait_queue is used when the skb transmit fails. The failed skb |
1709 | * will go in the wait_queue which will be emptied by the timer function or | |
85b4aa49 | 1710 | * by the next skb transmit. |
34f42a07 | 1711 | */ |
1875f27e | 1712 | static void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb) |
85b4aa49 | 1713 | { |
1875f27e | 1714 | struct fcoe_port *port = lport_priv(lport); |
4bb6b515 | 1715 | int rc; |
85b4aa49 | 1716 | |
014f5c3f | 1717 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
4bb6b515 VD |
1718 | |
1719 | if (skb) | |
014f5c3f | 1720 | __skb_queue_tail(&port->fcoe_pending_queue, skb); |
4bb6b515 | 1721 | |
014f5c3f | 1722 | if (port->fcoe_pending_queue_active) |
c826a314 | 1723 | goto out; |
014f5c3f | 1724 | port->fcoe_pending_queue_active = 1; |
55c8bafb | 1725 | |
014f5c3f | 1726 | while (port->fcoe_pending_queue.qlen) { |
55c8bafb | 1727 | /* keep qlen > 0 until fcoe_start_io succeeds */ |
014f5c3f CL |
1728 | port->fcoe_pending_queue.qlen++; |
1729 | skb = __skb_dequeue(&port->fcoe_pending_queue); | |
55c8bafb | 1730 | |
014f5c3f | 1731 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
55c8bafb | 1732 | rc = fcoe_start_io(skb); |
014f5c3f | 1733 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
55c8bafb CL |
1734 | |
1735 | if (rc) { | |
014f5c3f | 1736 | __skb_queue_head(&port->fcoe_pending_queue, skb); |
55c8bafb | 1737 | /* undo temporary increment above */ |
014f5c3f | 1738 | port->fcoe_pending_queue.qlen--; |
55c8bafb | 1739 | break; |
85b4aa49 | 1740 | } |
55c8bafb | 1741 | /* undo temporary increment above */ |
014f5c3f | 1742 | port->fcoe_pending_queue.qlen--; |
85b4aa49 | 1743 | } |
55c8bafb | 1744 | |
014f5c3f | 1745 | if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH) |
1875f27e | 1746 | lport->qfull = 0; |
014f5c3f CL |
1747 | if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer)) |
1748 | mod_timer(&port->timer, jiffies + 2); | |
1749 | port->fcoe_pending_queue_active = 0; | |
c826a314 | 1750 | out: |
014f5c3f | 1751 | if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH) |
1875f27e | 1752 | lport->qfull = 1; |
014f5c3f | 1753 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
4bb6b515 | 1754 | return; |
85b4aa49 RL |
1755 | } |
1756 | ||
85b4aa49 | 1757 | /** |
1875f27e | 1758 | * fcoe_dev_setup() - Setup the link change notification interface |
34f42a07 | 1759 | */ |
b0d428ad | 1760 | static void fcoe_dev_setup(void) |
85b4aa49 | 1761 | { |
85b4aa49 RL |
1762 | register_netdevice_notifier(&fcoe_notifier); |
1763 | } | |
1764 | ||
1765 | /** | |
1875f27e | 1766 | * fcoe_dev_cleanup() - Cleanup the link change notification interface |
34f42a07 | 1767 | */ |
85b4aa49 RL |
1768 | static void fcoe_dev_cleanup(void) |
1769 | { | |
1770 | unregister_netdevice_notifier(&fcoe_notifier); | |
1771 | } | |
1772 | ||
1773 | /** | |
1875f27e RL |
1774 | * fcoe_device_notification() - Handler for net device events |
1775 | * @notifier: The context of the notification | |
1776 | * @event: The type of event | |
1777 | * @ptr: The net device that the event was on | |
85b4aa49 | 1778 | * |
1875f27e | 1779 | * This function is called by the Ethernet driver in case of link change event. |
85b4aa49 RL |
1780 | * |
1781 | * Returns: 0 for success | |
34f42a07 | 1782 | */ |
85b4aa49 RL |
1783 | static int fcoe_device_notification(struct notifier_block *notifier, |
1784 | ulong event, void *ptr) | |
1785 | { | |
1875f27e | 1786 | struct fc_lport *lport = NULL; |
1d1b88dc | 1787 | struct net_device *netdev = ptr; |
014f5c3f | 1788 | struct fcoe_interface *fcoe; |
2e70e241 | 1789 | struct fcoe_port *port; |
85b4aa49 | 1790 | struct fcoe_dev_stats *stats; |
97c8389d | 1791 | u32 link_possible = 1; |
85b4aa49 RL |
1792 | u32 mfs; |
1793 | int rc = NOTIFY_OK; | |
1794 | ||
014f5c3f | 1795 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
25024989 | 1796 | if (fcoe->netdev == netdev) { |
1875f27e | 1797 | lport = fcoe->ctlr.lp; |
85b4aa49 RL |
1798 | break; |
1799 | } | |
1800 | } | |
1875f27e | 1801 | if (!lport) { |
85b4aa49 RL |
1802 | rc = NOTIFY_DONE; |
1803 | goto out; | |
1804 | } | |
1805 | ||
85b4aa49 RL |
1806 | switch (event) { |
1807 | case NETDEV_DOWN: | |
1808 | case NETDEV_GOING_DOWN: | |
97c8389d | 1809 | link_possible = 0; |
85b4aa49 RL |
1810 | break; |
1811 | case NETDEV_UP: | |
1812 | case NETDEV_CHANGE: | |
85b4aa49 RL |
1813 | break; |
1814 | case NETDEV_CHANGEMTU: | |
7221d7e5 YZ |
1815 | if (netdev->features & NETIF_F_FCOE_MTU) |
1816 | break; | |
1d1b88dc VD |
1817 | mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + |
1818 | sizeof(struct fcoe_crc_eof)); | |
85b4aa49 | 1819 | if (mfs >= FC_MIN_MAX_FRAME) |
1875f27e | 1820 | fc_set_mfs(lport, mfs); |
85b4aa49 RL |
1821 | break; |
1822 | case NETDEV_REGISTER: | |
1823 | break; | |
2e70e241 CL |
1824 | case NETDEV_UNREGISTER: |
1825 | list_del(&fcoe->list); | |
1826 | port = lport_priv(fcoe->ctlr.lp); | |
1827 | fcoe_interface_cleanup(fcoe); | |
1828 | schedule_work(&port->destroy_work); | |
1829 | goto out; | |
1830 | break; | |
85b4aa49 | 1831 | default: |
1d1b88dc | 1832 | FCOE_NETDEV_DBG(netdev, "Unknown event %ld " |
d5488eb9 | 1833 | "from netdev netlink\n", event); |
85b4aa49 | 1834 | } |
5e4f8fe7 RL |
1835 | |
1836 | fcoe_link_speed_update(lport); | |
1837 | ||
1875f27e | 1838 | if (link_possible && !fcoe_link_ok(lport)) |
3fe9a0ba CL |
1839 | fcoe_ctlr_link_up(&fcoe->ctlr); |
1840 | else if (fcoe_ctlr_link_down(&fcoe->ctlr)) { | |
f018b73a | 1841 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); |
97c8389d | 1842 | stats->LinkFailureCount++; |
f018b73a | 1843 | put_cpu(); |
1875f27e | 1844 | fcoe_clean_pending_queue(lport); |
85b4aa49 RL |
1845 | } |
1846 | out: | |
1847 | return rc; | |
1848 | } | |
1849 | ||
1850 | /** | |
1875f27e RL |
1851 | * fcoe_if_to_netdev() - Parse a name buffer to get a net device |
1852 | * @buffer: The name of the net device | |
85b4aa49 | 1853 | * |
1875f27e | 1854 | * Returns: NULL or a ptr to net_device |
34f42a07 | 1855 | */ |
85b4aa49 RL |
1856 | static struct net_device *fcoe_if_to_netdev(const char *buffer) |
1857 | { | |
1858 | char *cp; | |
1859 | char ifname[IFNAMSIZ + 2]; | |
1860 | ||
1861 | if (buffer) { | |
1862 | strlcpy(ifname, buffer, IFNAMSIZ); | |
1863 | cp = ifname + strlen(ifname); | |
1864 | while (--cp >= ifname && *cp == '\n') | |
1865 | *cp = '\0'; | |
1866 | return dev_get_by_name(&init_net, ifname); | |
1867 | } | |
1868 | return NULL; | |
1869 | } | |
1870 | ||
55a66d3c VD |
1871 | /** |
1872 | * fcoe_disable() - Disables a FCoE interface | |
1873 | * @buffer: The name of the Ethernet interface to be disabled | |
1874 | * @kp: The associated kernel parameter | |
1875 | * | |
1876 | * Called from sysfs. | |
1877 | * | |
1878 | * Returns: 0 for success | |
1879 | */ | |
1880 | static int fcoe_disable(const char *buffer, struct kernel_param *kp) | |
1881 | { | |
1882 | struct fcoe_interface *fcoe; | |
1883 | struct net_device *netdev; | |
1884 | int rc = 0; | |
1885 | ||
1886 | mutex_lock(&fcoe_config_mutex); | |
1887 | #ifdef CONFIG_FCOE_MODULE | |
1888 | /* | |
1889 | * Make sure the module has been initialized, and is not about to be | |
1890 | * removed. Module paramter sysfs files are writable before the | |
1891 | * module_init function is called and after module_exit. | |
1892 | */ | |
1893 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
1894 | rc = -ENODEV; | |
1895 | goto out_nodev; | |
1896 | } | |
1897 | #endif | |
1898 | ||
1899 | netdev = fcoe_if_to_netdev(buffer); | |
1900 | if (!netdev) { | |
1901 | rc = -ENODEV; | |
1902 | goto out_nodev; | |
1903 | } | |
1904 | ||
1905 | rtnl_lock(); | |
1906 | fcoe = fcoe_hostlist_lookup_port(netdev); | |
1907 | rtnl_unlock(); | |
1908 | ||
9ee50e48 | 1909 | if (fcoe) { |
55a66d3c | 1910 | fc_fabric_logoff(fcoe->ctlr.lp); |
9ee50e48 CL |
1911 | fcoe_ctlr_link_down(&fcoe->ctlr); |
1912 | } else | |
55a66d3c VD |
1913 | rc = -ENODEV; |
1914 | ||
1915 | dev_put(netdev); | |
1916 | out_nodev: | |
1917 | mutex_unlock(&fcoe_config_mutex); | |
1918 | return rc; | |
1919 | } | |
1920 | ||
1921 | /** | |
1922 | * fcoe_enable() - Enables a FCoE interface | |
1923 | * @buffer: The name of the Ethernet interface to be enabled | |
1924 | * @kp: The associated kernel parameter | |
1925 | * | |
1926 | * Called from sysfs. | |
1927 | * | |
1928 | * Returns: 0 for success | |
1929 | */ | |
1930 | static int fcoe_enable(const char *buffer, struct kernel_param *kp) | |
1931 | { | |
1932 | struct fcoe_interface *fcoe; | |
1933 | struct net_device *netdev; | |
1934 | int rc = 0; | |
1935 | ||
1936 | mutex_lock(&fcoe_config_mutex); | |
1937 | #ifdef CONFIG_FCOE_MODULE | |
1938 | /* | |
1939 | * Make sure the module has been initialized, and is not about to be | |
1940 | * removed. Module paramter sysfs files are writable before the | |
1941 | * module_init function is called and after module_exit. | |
1942 | */ | |
1943 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
1944 | rc = -ENODEV; | |
1945 | goto out_nodev; | |
1946 | } | |
1947 | #endif | |
1948 | ||
1949 | netdev = fcoe_if_to_netdev(buffer); | |
1950 | if (!netdev) { | |
1951 | rc = -ENODEV; | |
1952 | goto out_nodev; | |
1953 | } | |
1954 | ||
1955 | rtnl_lock(); | |
1956 | fcoe = fcoe_hostlist_lookup_port(netdev); | |
1957 | rtnl_unlock(); | |
1958 | ||
9ee50e48 CL |
1959 | if (fcoe) { |
1960 | if (!fcoe_link_ok(fcoe->ctlr.lp)) | |
1961 | fcoe_ctlr_link_up(&fcoe->ctlr); | |
55a66d3c | 1962 | rc = fc_fabric_login(fcoe->ctlr.lp); |
9ee50e48 | 1963 | } else |
55a66d3c VD |
1964 | rc = -ENODEV; |
1965 | ||
1966 | dev_put(netdev); | |
1967 | out_nodev: | |
1968 | mutex_unlock(&fcoe_config_mutex); | |
1969 | return rc; | |
1970 | } | |
1971 | ||
85b4aa49 | 1972 | /** |
1875f27e RL |
1973 | * fcoe_destroy() - Destroy a FCoE interface |
1974 | * @buffer: The name of the Ethernet interface to be destroyed | |
1975 | * @kp: The associated kernel parameter | |
1976 | * | |
1977 | * Called from sysfs. | |
85b4aa49 RL |
1978 | * |
1979 | * Returns: 0 for success | |
34f42a07 | 1980 | */ |
85b4aa49 RL |
1981 | static int fcoe_destroy(const char *buffer, struct kernel_param *kp) |
1982 | { | |
030f4e00 | 1983 | struct fcoe_interface *fcoe; |
2e70e241 | 1984 | struct net_device *netdev; |
8eca355f | 1985 | int rc = 0; |
85b4aa49 | 1986 | |
dfc1d0fe CL |
1987 | mutex_lock(&fcoe_config_mutex); |
1988 | #ifdef CONFIG_FCOE_MODULE | |
1989 | /* | |
1990 | * Make sure the module has been initialized, and is not about to be | |
1991 | * removed. Module paramter sysfs files are writable before the | |
1992 | * module_init function is called and after module_exit. | |
1993 | */ | |
1994 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
1995 | rc = -ENODEV; | |
1996 | goto out_nodev; | |
1997 | } | |
1998 | #endif | |
1999 | ||
85b4aa49 RL |
2000 | netdev = fcoe_if_to_netdev(buffer); |
2001 | if (!netdev) { | |
2002 | rc = -ENODEV; | |
2003 | goto out_nodev; | |
2004 | } | |
2e70e241 | 2005 | |
090eb6c4 | 2006 | rtnl_lock(); |
2e70e241 CL |
2007 | fcoe = fcoe_hostlist_lookup_port(netdev); |
2008 | if (!fcoe) { | |
090eb6c4 | 2009 | rtnl_unlock(); |
85b4aa49 RL |
2010 | rc = -ENODEV; |
2011 | goto out_putdev; | |
2012 | } | |
2e70e241 | 2013 | list_del(&fcoe->list); |
2e70e241 CL |
2014 | fcoe_interface_cleanup(fcoe); |
2015 | rtnl_unlock(); | |
2016 | fcoe_if_destroy(fcoe->ctlr.lp); | |
6409ea65 RL |
2017 | module_put(THIS_MODULE); |
2018 | ||
85b4aa49 RL |
2019 | out_putdev: |
2020 | dev_put(netdev); | |
2021 | out_nodev: | |
dfc1d0fe | 2022 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 RL |
2023 | return rc; |
2024 | } | |
2025 | ||
1875f27e RL |
2026 | /** |
2027 | * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context | |
2028 | * @work: Handle to the FCoE port to be destroyed | |
2029 | */ | |
2e70e241 CL |
2030 | static void fcoe_destroy_work(struct work_struct *work) |
2031 | { | |
2032 | struct fcoe_port *port; | |
2033 | ||
2034 | port = container_of(work, struct fcoe_port, destroy_work); | |
2035 | mutex_lock(&fcoe_config_mutex); | |
2036 | fcoe_if_destroy(port->lport); | |
2037 | mutex_unlock(&fcoe_config_mutex); | |
2038 | } | |
2039 | ||
85b4aa49 | 2040 | /** |
1875f27e RL |
2041 | * fcoe_create() - Create a fcoe interface |
2042 | * @buffer: The name of the Ethernet interface to create on | |
2043 | * @kp: The associated kernel param | |
2044 | * | |
2045 | * Called from sysfs. | |
85b4aa49 RL |
2046 | * |
2047 | * Returns: 0 for success | |
34f42a07 | 2048 | */ |
85b4aa49 RL |
2049 | static int fcoe_create(const char *buffer, struct kernel_param *kp) |
2050 | { | |
2051 | int rc; | |
030f4e00 | 2052 | struct fcoe_interface *fcoe; |
af7f85d9 | 2053 | struct fc_lport *lport; |
85b4aa49 RL |
2054 | struct net_device *netdev; |
2055 | ||
dfc1d0fe CL |
2056 | mutex_lock(&fcoe_config_mutex); |
2057 | #ifdef CONFIG_FCOE_MODULE | |
2058 | /* | |
2059 | * Make sure the module has been initialized, and is not about to be | |
2060 | * removed. Module paramter sysfs files are writable before the | |
2061 | * module_init function is called and after module_exit. | |
2062 | */ | |
2063 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
2064 | rc = -ENODEV; | |
721cafaf | 2065 | goto out_nomod; |
dfc1d0fe CL |
2066 | } |
2067 | #endif | |
2068 | ||
6409ea65 RL |
2069 | if (!try_module_get(THIS_MODULE)) { |
2070 | rc = -EINVAL; | |
2071 | goto out_nomod; | |
2072 | } | |
2073 | ||
2e70e241 | 2074 | rtnl_lock(); |
85b4aa49 RL |
2075 | netdev = fcoe_if_to_netdev(buffer); |
2076 | if (!netdev) { | |
2077 | rc = -ENODEV; | |
2078 | goto out_nodev; | |
2079 | } | |
2e70e241 | 2080 | |
85b4aa49 RL |
2081 | /* look for existing lport */ |
2082 | if (fcoe_hostlist_lookup(netdev)) { | |
2083 | rc = -EEXIST; | |
2084 | goto out_putdev; | |
2085 | } | |
85b4aa49 | 2086 | |
030f4e00 CL |
2087 | fcoe = fcoe_interface_create(netdev); |
2088 | if (!fcoe) { | |
2089 | rc = -ENOMEM; | |
2090 | goto out_putdev; | |
2091 | } | |
2092 | ||
9a05753b | 2093 | lport = fcoe_if_create(fcoe, &netdev->dev, 0); |
af7f85d9 | 2094 | if (IS_ERR(lport)) { |
d5488eb9 | 2095 | printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", |
85b4aa49 | 2096 | netdev->name); |
85b4aa49 | 2097 | rc = -EIO; |
2e70e241 | 2098 | fcoe_interface_cleanup(fcoe); |
030f4e00 | 2099 | goto out_free; |
85b4aa49 | 2100 | } |
030f4e00 | 2101 | |
54b649f8 CL |
2102 | /* Make this the "master" N_Port */ |
2103 | fcoe->ctlr.lp = lport; | |
2104 | ||
c863df33 CL |
2105 | /* add to lports list */ |
2106 | fcoe_hostlist_add(lport); | |
2107 | ||
54b649f8 CL |
2108 | /* start FIP Discovery and FLOGI */ |
2109 | lport->boot_time = jiffies; | |
2110 | fc_fabric_login(lport); | |
2111 | if (!fcoe_link_ok(lport)) | |
2112 | fcoe_ctlr_link_up(&fcoe->ctlr); | |
030f4e00 | 2113 | |
54b649f8 CL |
2114 | /* |
2115 | * Release from init in fcoe_interface_create(), on success lport | |
2116 | * should be holding a reference taken in fcoe_if_create(). | |
2117 | */ | |
030f4e00 | 2118 | fcoe_interface_put(fcoe); |
6409ea65 RL |
2119 | dev_put(netdev); |
2120 | rtnl_unlock(); | |
2121 | mutex_unlock(&fcoe_config_mutex); | |
2122 | ||
2123 | return 0; | |
2124 | out_free: | |
2125 | fcoe_interface_put(fcoe); | |
85b4aa49 RL |
2126 | out_putdev: |
2127 | dev_put(netdev); | |
2128 | out_nodev: | |
2e70e241 | 2129 | rtnl_unlock(); |
6409ea65 RL |
2130 | module_put(THIS_MODULE); |
2131 | out_nomod: | |
dfc1d0fe | 2132 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 RL |
2133 | return rc; |
2134 | } | |
2135 | ||
34f42a07 | 2136 | /** |
5e4f8fe7 RL |
2137 | * fcoe_link_speed_update() - Update the supported and actual link speeds |
2138 | * @lport: The local port to update speeds for | |
85b4aa49 | 2139 | * |
5e4f8fe7 RL |
2140 | * Returns: 0 if the ethtool query was successful |
2141 | * -1 if the ethtool query failed | |
85b4aa49 | 2142 | */ |
5e4f8fe7 | 2143 | int fcoe_link_speed_update(struct fc_lport *lport) |
85b4aa49 | 2144 | { |
1875f27e RL |
2145 | struct fcoe_port *port = lport_priv(lport); |
2146 | struct net_device *netdev = port->fcoe->netdev; | |
85b4aa49 | 2147 | struct ethtool_cmd ecmd = { ETHTOOL_GSET }; |
85b4aa49 | 2148 | |
5e4f8fe7 | 2149 | if (!dev_ethtool_get_settings(netdev, &ecmd)) { |
1875f27e | 2150 | lport->link_supported_speeds &= |
2f718d64 YZ |
2151 | ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT); |
2152 | if (ecmd.supported & (SUPPORTED_1000baseT_Half | | |
2153 | SUPPORTED_1000baseT_Full)) | |
1875f27e | 2154 | lport->link_supported_speeds |= FC_PORTSPEED_1GBIT; |
2f718d64 | 2155 | if (ecmd.supported & SUPPORTED_10000baseT_Full) |
1875f27e | 2156 | lport->link_supported_speeds |= |
2f718d64 YZ |
2157 | FC_PORTSPEED_10GBIT; |
2158 | if (ecmd.speed == SPEED_1000) | |
1875f27e | 2159 | lport->link_speed = FC_PORTSPEED_1GBIT; |
2f718d64 | 2160 | if (ecmd.speed == SPEED_10000) |
1875f27e | 2161 | lport->link_speed = FC_PORTSPEED_10GBIT; |
85b4aa49 | 2162 | |
2f718d64 YZ |
2163 | return 0; |
2164 | } | |
2165 | return -1; | |
85b4aa49 | 2166 | } |
85b4aa49 | 2167 | |
5e4f8fe7 RL |
2168 | /** |
2169 | * fcoe_link_ok() - Check if the link is OK for a local port | |
2170 | * @lport: The local port to check link on | |
2171 | * | |
2172 | * Returns: 0 if link is UP and OK, -1 if not | |
2173 | * | |
2174 | */ | |
2175 | int fcoe_link_ok(struct fc_lport *lport) | |
2176 | { | |
2177 | struct fcoe_port *port = lport_priv(lport); | |
2178 | struct net_device *netdev = port->fcoe->netdev; | |
2179 | ||
2180 | if (netif_oper_up(netdev)) | |
2181 | return 0; | |
2182 | return -1; | |
2183 | } | |
2184 | ||
34f42a07 | 2185 | /** |
1875f27e RL |
2186 | * fcoe_percpu_clean() - Clear all pending skbs for an local port |
2187 | * @lport: The local port whose skbs are to be cleared | |
e7a51997 JE |
2188 | * |
2189 | * Must be called with fcoe_create_mutex held to single-thread completion. | |
2190 | * | |
2191 | * This flushes the pending skbs by adding a new skb to each queue and | |
2192 | * waiting until they are all freed. This assures us that not only are | |
2193 | * there no packets that will be handled by the lport, but also that any | |
2194 | * threads already handling packet have returned. | |
85b4aa49 | 2195 | */ |
1875f27e | 2196 | void fcoe_percpu_clean(struct fc_lport *lport) |
85b4aa49 | 2197 | { |
85b4aa49 RL |
2198 | struct fcoe_percpu_s *pp; |
2199 | struct fcoe_rcv_info *fr; | |
2200 | struct sk_buff_head *list; | |
2201 | struct sk_buff *skb, *next; | |
2202 | struct sk_buff *head; | |
5e5e92df | 2203 | unsigned int cpu; |
85b4aa49 | 2204 | |
5e5e92df RL |
2205 | for_each_possible_cpu(cpu) { |
2206 | pp = &per_cpu(fcoe_percpu, cpu); | |
2207 | spin_lock_bh(&pp->fcoe_rx_list.lock); | |
2208 | list = &pp->fcoe_rx_list; | |
2209 | head = list->next; | |
2210 | for (skb = head; skb != (struct sk_buff *)list; | |
2211 | skb = next) { | |
2212 | next = skb->next; | |
2213 | fr = fcoe_dev_from_skb(skb); | |
1875f27e | 2214 | if (fr->fr_dev == lport) { |
5e5e92df RL |
2215 | __skb_unlink(skb, list); |
2216 | kfree_skb(skb); | |
85b4aa49 | 2217 | } |
85b4aa49 | 2218 | } |
e7a51997 JE |
2219 | |
2220 | if (!pp->thread || !cpu_online(cpu)) { | |
2221 | spin_unlock_bh(&pp->fcoe_rx_list.lock); | |
2222 | continue; | |
2223 | } | |
2224 | ||
2225 | skb = dev_alloc_skb(0); | |
2226 | if (!skb) { | |
2227 | spin_unlock_bh(&pp->fcoe_rx_list.lock); | |
2228 | continue; | |
2229 | } | |
2230 | skb->destructor = fcoe_percpu_flush_done; | |
2231 | ||
2232 | __skb_queue_tail(&pp->fcoe_rx_list, skb); | |
2233 | if (pp->fcoe_rx_list.qlen == 1) | |
2234 | wake_up_process(pp->thread); | |
5e5e92df | 2235 | spin_unlock_bh(&pp->fcoe_rx_list.lock); |
e7a51997 JE |
2236 | |
2237 | wait_for_completion(&fcoe_flush_completion); | |
85b4aa49 RL |
2238 | } |
2239 | } | |
85b4aa49 RL |
2240 | |
2241 | /** | |
34f42a07 | 2242 | * fcoe_clean_pending_queue() - Dequeue a skb and free it |
1875f27e | 2243 | * @lport: The local port to dequeue a skb on |
34f42a07 | 2244 | */ |
1875f27e | 2245 | void fcoe_clean_pending_queue(struct fc_lport *lport) |
85b4aa49 | 2246 | { |
1875f27e | 2247 | struct fcoe_port *port = lport_priv(lport); |
85b4aa49 RL |
2248 | struct sk_buff *skb; |
2249 | ||
014f5c3f CL |
2250 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
2251 | while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) { | |
2252 | spin_unlock_bh(&port->fcoe_pending_queue.lock); | |
85b4aa49 | 2253 | kfree_skb(skb); |
014f5c3f | 2254 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
85b4aa49 | 2255 | } |
014f5c3f | 2256 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
85b4aa49 | 2257 | } |
85b4aa49 | 2258 | |
34f42a07 | 2259 | /** |
1875f27e RL |
2260 | * fcoe_reset() - Reset a local port |
2261 | * @shost: The SCSI host associated with the local port to be reset | |
85b4aa49 | 2262 | * |
1875f27e | 2263 | * Returns: Always 0 (return value required by FC transport template) |
85b4aa49 RL |
2264 | */ |
2265 | int fcoe_reset(struct Scsi_Host *shost) | |
2266 | { | |
2267 | struct fc_lport *lport = shost_priv(shost); | |
2268 | fc_lport_reset(lport); | |
2269 | return 0; | |
2270 | } | |
85b4aa49 | 2271 | |
34f42a07 | 2272 | /** |
1875f27e RL |
2273 | * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device |
2274 | * @netdev: The net device used as a key | |
85b4aa49 | 2275 | * |
1875f27e RL |
2276 | * Locking: Must be called with the RNL mutex held. |
2277 | * | |
2278 | * Returns: NULL or the FCoE interface | |
85b4aa49 | 2279 | */ |
014f5c3f | 2280 | static struct fcoe_interface * |
1875f27e | 2281 | fcoe_hostlist_lookup_port(const struct net_device *netdev) |
85b4aa49 | 2282 | { |
014f5c3f | 2283 | struct fcoe_interface *fcoe; |
85b4aa49 | 2284 | |
014f5c3f | 2285 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
1875f27e | 2286 | if (fcoe->netdev == netdev) |
014f5c3f | 2287 | return fcoe; |
85b4aa49 | 2288 | } |
85b4aa49 RL |
2289 | return NULL; |
2290 | } | |
2291 | ||
34f42a07 | 2292 | /** |
1875f27e RL |
2293 | * fcoe_hostlist_lookup() - Find the local port associated with a |
2294 | * given net device | |
2295 | * @netdev: The netdevice used as a key | |
85b4aa49 | 2296 | * |
1875f27e RL |
2297 | * Locking: Must be called with the RTNL mutex held |
2298 | * | |
2299 | * Returns: NULL or the local port | |
85b4aa49 | 2300 | */ |
090eb6c4 | 2301 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) |
85b4aa49 | 2302 | { |
014f5c3f | 2303 | struct fcoe_interface *fcoe; |
85b4aa49 | 2304 | |
014f5c3f | 2305 | fcoe = fcoe_hostlist_lookup_port(netdev); |
3fe9a0ba | 2306 | return (fcoe) ? fcoe->ctlr.lp : NULL; |
85b4aa49 | 2307 | } |
85b4aa49 | 2308 | |
34f42a07 | 2309 | /** |
1875f27e RL |
2310 | * fcoe_hostlist_add() - Add the FCoE interface identified by a local |
2311 | * port to the hostlist | |
2312 | * @lport: The local port that identifies the FCoE interface to be added | |
85b4aa49 | 2313 | * |
090eb6c4 | 2314 | * Locking: must be called with the RTNL mutex held |
1875f27e RL |
2315 | * |
2316 | * Returns: 0 for success | |
85b4aa49 | 2317 | */ |
090eb6c4 | 2318 | static int fcoe_hostlist_add(const struct fc_lport *lport) |
85b4aa49 | 2319 | { |
014f5c3f CL |
2320 | struct fcoe_interface *fcoe; |
2321 | struct fcoe_port *port; | |
2322 | ||
2323 | fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); | |
2324 | if (!fcoe) { | |
2325 | port = lport_priv(lport); | |
2326 | fcoe = port->fcoe; | |
2327 | list_add_tail(&fcoe->list, &fcoe_hostlist); | |
85b4aa49 RL |
2328 | } |
2329 | return 0; | |
2330 | } | |
85b4aa49 | 2331 | |
85b4aa49 | 2332 | /** |
1875f27e | 2333 | * fcoe_init() - Initialize fcoe.ko |
85b4aa49 | 2334 | * |
1875f27e | 2335 | * Returns: 0 on success, or a negative value on failure |
34f42a07 | 2336 | */ |
85b4aa49 RL |
2337 | static int __init fcoe_init(void) |
2338 | { | |
1875f27e | 2339 | struct fcoe_percpu_s *p; |
38eccabd | 2340 | unsigned int cpu; |
8976f424 | 2341 | int rc = 0; |
85b4aa49 | 2342 | |
dfc1d0fe CL |
2343 | mutex_lock(&fcoe_config_mutex); |
2344 | ||
38eccabd | 2345 | for_each_possible_cpu(cpu) { |
5e5e92df | 2346 | p = &per_cpu(fcoe_percpu, cpu); |
38eccabd RL |
2347 | skb_queue_head_init(&p->fcoe_rx_list); |
2348 | } | |
2349 | ||
8976f424 RL |
2350 | for_each_online_cpu(cpu) |
2351 | fcoe_percpu_thread_create(cpu); | |
85b4aa49 | 2352 | |
8976f424 RL |
2353 | /* Initialize per CPU interrupt thread */ |
2354 | rc = register_hotcpu_notifier(&fcoe_cpu_notifier); | |
2355 | if (rc) | |
2356 | goto out_free; | |
85b4aa49 | 2357 | |
8976f424 | 2358 | /* Setup link change notification */ |
85b4aa49 RL |
2359 | fcoe_dev_setup(); |
2360 | ||
5892c32f CL |
2361 | rc = fcoe_if_init(); |
2362 | if (rc) | |
2363 | goto out_free; | |
85b4aa49 | 2364 | |
dfc1d0fe | 2365 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 | 2366 | return 0; |
8976f424 RL |
2367 | |
2368 | out_free: | |
2369 | for_each_online_cpu(cpu) { | |
2370 | fcoe_percpu_thread_destroy(cpu); | |
2371 | } | |
dfc1d0fe | 2372 | mutex_unlock(&fcoe_config_mutex); |
8976f424 | 2373 | return rc; |
85b4aa49 RL |
2374 | } |
2375 | module_init(fcoe_init); | |
2376 | ||
2377 | /** | |
1875f27e | 2378 | * fcoe_exit() - Clean up fcoe.ko |
85b4aa49 | 2379 | * |
1875f27e | 2380 | * Returns: 0 on success or a negative value on failure |
34f42a07 | 2381 | */ |
85b4aa49 RL |
2382 | static void __exit fcoe_exit(void) |
2383 | { | |
014f5c3f | 2384 | struct fcoe_interface *fcoe, *tmp; |
2e70e241 | 2385 | struct fcoe_port *port; |
1875f27e | 2386 | unsigned int cpu; |
85b4aa49 | 2387 | |
dfc1d0fe CL |
2388 | mutex_lock(&fcoe_config_mutex); |
2389 | ||
85b4aa49 RL |
2390 | fcoe_dev_cleanup(); |
2391 | ||
5919a595 | 2392 | /* releases the associated fcoe hosts */ |
090eb6c4 CL |
2393 | rtnl_lock(); |
2394 | list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { | |
c863df33 | 2395 | list_del(&fcoe->list); |
2e70e241 | 2396 | port = lport_priv(fcoe->ctlr.lp); |
2e70e241 | 2397 | fcoe_interface_cleanup(fcoe); |
2e70e241 | 2398 | schedule_work(&port->destroy_work); |
c863df33 | 2399 | } |
090eb6c4 | 2400 | rtnl_unlock(); |
85b4aa49 | 2401 | |
8976f424 RL |
2402 | unregister_hotcpu_notifier(&fcoe_cpu_notifier); |
2403 | ||
014f5c3f | 2404 | for_each_online_cpu(cpu) |
8976f424 | 2405 | fcoe_percpu_thread_destroy(cpu); |
85b4aa49 | 2406 | |
dfc1d0fe | 2407 | mutex_unlock(&fcoe_config_mutex); |
2e70e241 CL |
2408 | |
2409 | /* flush any asyncronous interface destroys, | |
2410 | * this should happen after the netdev notifier is unregistered */ | |
2411 | flush_scheduled_work(); | |
9a05753b CL |
2412 | /* That will flush out all the N_Ports on the hostlist, but now we |
2413 | * may have NPIV VN_Ports scheduled for destruction */ | |
2414 | flush_scheduled_work(); | |
2e70e241 CL |
2415 | |
2416 | /* detach from scsi transport | |
2417 | * must happen after all destroys are done, therefor after the flush */ | |
2418 | fcoe_if_exit(); | |
85b4aa49 RL |
2419 | } |
2420 | module_exit(fcoe_exit); | |
11b56188 CL |
2421 | |
2422 | /** | |
2423 | * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler | |
2424 | * @seq: active sequence in the FLOGI or FDISC exchange | |
2425 | * @fp: response frame, or error encoded in a pointer (timeout) | |
2426 | * @arg: pointer the the fcoe_ctlr structure | |
2427 | * | |
2428 | * This handles MAC address managment for FCoE, then passes control on to | |
2429 | * the libfc FLOGI response handler. | |
2430 | */ | |
2431 | static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) | |
2432 | { | |
2433 | struct fcoe_ctlr *fip = arg; | |
2434 | struct fc_exch *exch = fc_seq_exch(seq); | |
2435 | struct fc_lport *lport = exch->lp; | |
2436 | u8 *mac; | |
2437 | ||
2438 | if (IS_ERR(fp)) | |
2439 | goto done; | |
2440 | ||
2441 | mac = fr_cb(fp)->granted_mac; | |
2442 | if (is_zero_ether_addr(mac)) { | |
2443 | /* pre-FIP */ | |
386309ce | 2444 | if (fcoe_ctlr_recv_flogi(fip, lport, fp)) { |
11b56188 CL |
2445 | fc_frame_free(fp); |
2446 | return; | |
2447 | } | |
11b56188 | 2448 | } |
386309ce | 2449 | fcoe_update_src_mac(lport, mac); |
11b56188 CL |
2450 | done: |
2451 | fc_lport_flogi_resp(seq, fp, lport); | |
2452 | } | |
2453 | ||
2454 | /** | |
2455 | * fcoe_logo_resp() - FCoE specific LOGO response handler | |
2456 | * @seq: active sequence in the LOGO exchange | |
2457 | * @fp: response frame, or error encoded in a pointer (timeout) | |
2458 | * @arg: pointer the the fcoe_ctlr structure | |
2459 | * | |
2460 | * This handles MAC address managment for FCoE, then passes control on to | |
2461 | * the libfc LOGO response handler. | |
2462 | */ | |
2463 | static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) | |
2464 | { | |
386309ce | 2465 | struct fc_lport *lport = arg; |
11b56188 CL |
2466 | static u8 zero_mac[ETH_ALEN] = { 0 }; |
2467 | ||
2468 | if (!IS_ERR(fp)) | |
386309ce | 2469 | fcoe_update_src_mac(lport, zero_mac); |
11b56188 CL |
2470 | fc_lport_logo_resp(seq, fp, lport); |
2471 | } | |
2472 | ||
2473 | /** | |
2474 | * fcoe_elsct_send - FCoE specific ELS handler | |
2475 | * | |
2476 | * This does special case handling of FIP encapsualted ELS exchanges for FCoE, | |
2477 | * using FCoE specific response handlers and passing the FIP controller as | |
2478 | * the argument (the lport is still available from the exchange). | |
2479 | * | |
2480 | * Most of the work here is just handed off to the libfc routine. | |
2481 | */ | |
1875f27e RL |
2482 | static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, |
2483 | struct fc_frame *fp, unsigned int op, | |
2484 | void (*resp)(struct fc_seq *, | |
2485 | struct fc_frame *, | |
2486 | void *), | |
2487 | void *arg, u32 timeout) | |
11b56188 CL |
2488 | { |
2489 | struct fcoe_port *port = lport_priv(lport); | |
2490 | struct fcoe_interface *fcoe = port->fcoe; | |
2491 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
2492 | struct fc_frame_header *fh = fc_frame_header_get(fp); | |
2493 | ||
2494 | switch (op) { | |
2495 | case ELS_FLOGI: | |
2496 | case ELS_FDISC: | |
2497 | return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, | |
2498 | fip, timeout); | |
2499 | case ELS_LOGO: | |
2500 | /* only hook onto fabric logouts, not port logouts */ | |
2501 | if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) | |
2502 | break; | |
2503 | return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, | |
386309ce | 2504 | lport, timeout); |
11b56188 CL |
2505 | } |
2506 | return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); | |
2507 | } | |
2508 | ||
9a05753b CL |
2509 | /** |
2510 | * fcoe_vport_create() - create an fc_host/scsi_host for a vport | |
2511 | * @vport: fc_vport object to create a new fc_host for | |
2512 | * @disabled: start the new fc_host in a disabled state by default? | |
2513 | * | |
2514 | * Returns: 0 for success | |
2515 | */ | |
2516 | static int fcoe_vport_create(struct fc_vport *vport, bool disabled) | |
2517 | { | |
2518 | struct Scsi_Host *shost = vport_to_shost(vport); | |
2519 | struct fc_lport *n_port = shost_priv(shost); | |
2520 | struct fcoe_port *port = lport_priv(n_port); | |
2521 | struct fcoe_interface *fcoe = port->fcoe; | |
2522 | struct net_device *netdev = fcoe->netdev; | |
2523 | struct fc_lport *vn_port; | |
2524 | ||
2525 | mutex_lock(&fcoe_config_mutex); | |
2526 | vn_port = fcoe_if_create(fcoe, &vport->dev, 1); | |
2527 | mutex_unlock(&fcoe_config_mutex); | |
2528 | ||
2529 | if (IS_ERR(vn_port)) { | |
2530 | printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", | |
2531 | netdev->name); | |
2532 | return -EIO; | |
2533 | } | |
2534 | ||
2535 | if (disabled) { | |
2536 | fc_vport_set_state(vport, FC_VPORT_DISABLED); | |
2537 | } else { | |
2538 | vn_port->boot_time = jiffies; | |
2539 | fc_fabric_login(vn_port); | |
2540 | fc_vport_setlink(vn_port); | |
2541 | } | |
2542 | return 0; | |
2543 | } | |
2544 | ||
2545 | /** | |
2546 | * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport | |
2547 | * @vport: fc_vport object that is being destroyed | |
2548 | * | |
2549 | * Returns: 0 for success | |
2550 | */ | |
2551 | static int fcoe_vport_destroy(struct fc_vport *vport) | |
2552 | { | |
2553 | struct Scsi_Host *shost = vport_to_shost(vport); | |
2554 | struct fc_lport *n_port = shost_priv(shost); | |
2555 | struct fc_lport *vn_port = vport->dd_data; | |
2556 | struct fcoe_port *port = lport_priv(vn_port); | |
2557 | ||
2558 | mutex_lock(&n_port->lp_mutex); | |
2559 | list_del(&vn_port->list); | |
2560 | mutex_unlock(&n_port->lp_mutex); | |
2561 | schedule_work(&port->destroy_work); | |
2562 | return 0; | |
2563 | } | |
2564 | ||
2565 | /** | |
2566 | * fcoe_vport_disable() - change vport state | |
2567 | * @vport: vport to bring online/offline | |
2568 | * @disable: should the vport be disabled? | |
2569 | */ | |
2570 | static int fcoe_vport_disable(struct fc_vport *vport, bool disable) | |
2571 | { | |
2572 | struct fc_lport *lport = vport->dd_data; | |
2573 | ||
2574 | if (disable) { | |
2575 | fc_vport_set_state(vport, FC_VPORT_DISABLED); | |
2576 | fc_fabric_logoff(lport); | |
2577 | } else { | |
2578 | lport->boot_time = jiffies; | |
2579 | fc_fabric_login(lport); | |
2580 | fc_vport_setlink(lport); | |
2581 | } | |
2582 | ||
2583 | return 0; | |
2584 | } | |
2585 | ||
dc8596d3 CL |
2586 | /** |
2587 | * fcoe_vport_set_symbolic_name() - append vport string to symbolic name | |
2588 | * @vport: fc_vport with a new symbolic name string | |
2589 | * | |
2590 | * After generating a new symbolic name string, a new RSPN_ID request is | |
2591 | * sent to the name server. There is no response handler, so if it fails | |
2592 | * for some reason it will not be retried. | |
2593 | */ | |
2594 | static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) | |
2595 | { | |
2596 | struct fc_lport *lport = vport->dd_data; | |
2597 | struct fc_frame *fp; | |
2598 | size_t len; | |
2599 | ||
2600 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, | |
2601 | "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, | |
2602 | fcoe_netdev(lport)->name, vport->symbolic_name); | |
2603 | ||
2604 | if (lport->state != LPORT_ST_READY) | |
2605 | return; | |
2606 | ||
2607 | len = strnlen(fc_host_symbolic_name(lport->host), 255); | |
2608 | fp = fc_frame_alloc(lport, | |
2609 | sizeof(struct fc_ct_hdr) + | |
2610 | sizeof(struct fc_ns_rspn) + len); | |
2611 | if (!fp) | |
2612 | return; | |
2613 | lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, | |
b94f8951 | 2614 | NULL, NULL, 3 * lport->r_a_tov); |
dc8596d3 | 2615 | } |
b84056bf YZ |
2616 | |
2617 | /** | |
2618 | * fcoe_get_lesb() - Fill the FCoE Link Error Status Block | |
2619 | * @lport: the local port | |
2620 | * @fc_lesb: the link error status block | |
2621 | */ | |
2622 | static void fcoe_get_lesb(struct fc_lport *lport, | |
2623 | struct fc_els_lesb *fc_lesb) | |
2624 | { | |
2625 | unsigned int cpu; | |
2626 | u32 lfc, vlfc, mdac; | |
2627 | struct fcoe_dev_stats *devst; | |
2628 | struct fcoe_fc_els_lesb *lesb; | |
2629 | struct net_device *netdev = fcoe_netdev(lport); | |
2630 | ||
2631 | lfc = 0; | |
2632 | vlfc = 0; | |
2633 | mdac = 0; | |
2634 | lesb = (struct fcoe_fc_els_lesb *)fc_lesb; | |
2635 | memset(lesb, 0, sizeof(*lesb)); | |
2636 | for_each_possible_cpu(cpu) { | |
2637 | devst = per_cpu_ptr(lport->dev_stats, cpu); | |
2638 | lfc += devst->LinkFailureCount; | |
2639 | vlfc += devst->VLinkFailureCount; | |
2640 | mdac += devst->MissDiscAdvCount; | |
2641 | } | |
2642 | lesb->lesb_link_fail = htonl(lfc); | |
2643 | lesb->lesb_vlink_fail = htonl(vlfc); | |
2644 | lesb->lesb_miss_fka = htonl(mdac); | |
2645 | lesb->lesb_fcs_error = htonl(dev_get_stats(netdev)->rx_crc_errors); | |
2646 | } | |
7d65b0df JE |
2647 | |
2648 | /** | |
2649 | * fcoe_set_port_id() - Callback from libfc when Port_ID is set. | |
2650 | * @lport: the local port | |
2651 | * @port_id: the port ID | |
2652 | * @fp: the received frame, if any, that caused the port_id to be set. | |
2653 | * | |
2654 | * This routine handles the case where we received a FLOGI and are | |
2655 | * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi() | |
2656 | * so it can set the non-mapped mode and gateway address. | |
2657 | * | |
2658 | * The FLOGI LS_ACC is handled by fcoe_flogi_resp(). | |
2659 | */ | |
2660 | static void fcoe_set_port_id(struct fc_lport *lport, | |
2661 | u32 port_id, struct fc_frame *fp) | |
2662 | { | |
2663 | struct fcoe_port *port = lport_priv(lport); | |
2664 | struct fcoe_interface *fcoe = port->fcoe; | |
2665 | ||
2666 | if (fp && fc_frame_payload_op(fp) == ELS_FLOGI) | |
2667 | fcoe_ctlr_recv_flogi(&fcoe->ctlr, lport, fp); | |
2668 | } |