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85b4aa49 | 1 | /* |
af7f85d9 | 2 | * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved. |
85b4aa49 RL |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | * | |
17 | * Maintained at www.Open-FCoE.org | |
18 | */ | |
19 | ||
20 | #include <linux/module.h> | |
21 | #include <linux/version.h> | |
85b4aa49 | 22 | #include <linux/spinlock.h> |
85b4aa49 RL |
23 | #include <linux/netdevice.h> |
24 | #include <linux/etherdevice.h> | |
25 | #include <linux/ethtool.h> | |
26 | #include <linux/if_ether.h> | |
27 | #include <linux/if_vlan.h> | |
85b4aa49 RL |
28 | #include <linux/crc32.h> |
29 | #include <linux/cpu.h> | |
30 | #include <linux/fs.h> | |
31 | #include <linux/sysfs.h> | |
32 | #include <linux/ctype.h> | |
33 | #include <scsi/scsi_tcq.h> | |
34 | #include <scsi/scsicam.h> | |
35 | #include <scsi/scsi_transport.h> | |
36 | #include <scsi/scsi_transport_fc.h> | |
37 | #include <net/rtnetlink.h> | |
38 | ||
39 | #include <scsi/fc/fc_encaps.h> | |
97c8389d | 40 | #include <scsi/fc/fc_fip.h> |
85b4aa49 RL |
41 | |
42 | #include <scsi/libfc.h> | |
43 | #include <scsi/fc_frame.h> | |
44 | #include <scsi/libfcoe.h> | |
85b4aa49 | 45 | |
fdd78027 | 46 | #include "fcoe.h" |
7f349142 | 47 | |
85b4aa49 RL |
48 | MODULE_AUTHOR("Open-FCoE.org"); |
49 | MODULE_DESCRIPTION("FCoE"); | |
9b34ecff | 50 | MODULE_LICENSE("GPL v2"); |
85b4aa49 | 51 | |
05cc7390 YZ |
52 | /* Performance tuning parameters for fcoe */ |
53 | static unsigned int fcoe_ddp_min; | |
54 | module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR); | |
55 | MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \ | |
56 | "Direct Data Placement (DDP)."); | |
57 | ||
dfc1d0fe CL |
58 | DEFINE_MUTEX(fcoe_config_mutex); |
59 | ||
e7a51997 JE |
60 | /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */ |
61 | static DECLARE_COMPLETION(fcoe_flush_completion); | |
62 | ||
85b4aa49 | 63 | /* fcoe host list */ |
090eb6c4 | 64 | /* must only by accessed under the RTNL mutex */ |
85b4aa49 | 65 | LIST_HEAD(fcoe_hostlist); |
5e5e92df | 66 | DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu); |
85b4aa49 | 67 | |
dd3fd72e | 68 | /* Function Prototypes */ |
1875f27e | 69 | static int fcoe_reset(struct Scsi_Host *); |
fdd78027 VD |
70 | static int fcoe_xmit(struct fc_lport *, struct fc_frame *); |
71 | static int fcoe_rcv(struct sk_buff *, struct net_device *, | |
72 | struct packet_type *, struct net_device *); | |
1875f27e RL |
73 | static int fcoe_percpu_receive_thread(void *); |
74 | static void fcoe_clean_pending_queue(struct fc_lport *); | |
75 | static void fcoe_percpu_clean(struct fc_lport *); | |
76 | static int fcoe_link_ok(struct fc_lport *); | |
fdd78027 VD |
77 | |
78 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); | |
79 | static int fcoe_hostlist_add(const struct fc_lport *); | |
fdd78027 | 80 | |
4bb6b515 | 81 | static void fcoe_check_wait_queue(struct fc_lport *, struct sk_buff *); |
85b4aa49 RL |
82 | static int fcoe_device_notification(struct notifier_block *, ulong, void *); |
83 | static void fcoe_dev_setup(void); | |
84 | static void fcoe_dev_cleanup(void); | |
1875f27e RL |
85 | static struct fcoe_interface |
86 | *fcoe_hostlist_lookup_port(const struct net_device *); | |
87 | ||
88 | static int fcoe_fip_recv(struct sk_buff *, struct net_device *, | |
89 | struct packet_type *, struct net_device *); | |
90 | ||
91 | static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *); | |
92 | static void fcoe_update_src_mac(struct fc_lport *, u8 *); | |
93 | static u8 *fcoe_get_src_mac(struct fc_lport *); | |
94 | static void fcoe_destroy_work(struct work_struct *); | |
95 | ||
96 | static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *, | |
97 | unsigned int); | |
98 | static int fcoe_ddp_done(struct fc_lport *, u16); | |
99 | ||
100 | static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *); | |
101 | ||
102 | static int fcoe_create(const char *, struct kernel_param *); | |
103 | static int fcoe_destroy(const char *, struct kernel_param *); | |
55a66d3c VD |
104 | static int fcoe_enable(const char *, struct kernel_param *); |
105 | static int fcoe_disable(const char *, struct kernel_param *); | |
1875f27e | 106 | |
1875f27e RL |
107 | static struct fc_seq *fcoe_elsct_send(struct fc_lport *, |
108 | u32 did, struct fc_frame *, | |
109 | unsigned int op, | |
110 | void (*resp)(struct fc_seq *, | |
111 | struct fc_frame *, | |
112 | void *), | |
113 | void *, u32 timeout); | |
859b7b64 | 114 | static void fcoe_recv_frame(struct sk_buff *skb); |
1875f27e | 115 | |
b84056bf YZ |
116 | static void fcoe_get_lesb(struct fc_lport *, struct fc_els_lesb *); |
117 | ||
1875f27e RL |
118 | module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR); |
119 | __MODULE_PARM_TYPE(create, "string"); | |
55a66d3c | 120 | MODULE_PARM_DESC(create, " Creates fcoe instance on a ethernet interface"); |
1875f27e RL |
121 | module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR); |
122 | __MODULE_PARM_TYPE(destroy, "string"); | |
55a66d3c VD |
123 | MODULE_PARM_DESC(destroy, " Destroys fcoe instance on a ethernet interface"); |
124 | module_param_call(enable, fcoe_enable, NULL, NULL, S_IWUSR); | |
125 | __MODULE_PARM_TYPE(enable, "string"); | |
126 | MODULE_PARM_DESC(enable, " Enables fcoe on a ethernet interface."); | |
127 | module_param_call(disable, fcoe_disable, NULL, NULL, S_IWUSR); | |
128 | __MODULE_PARM_TYPE(disable, "string"); | |
129 | MODULE_PARM_DESC(disable, " Disables fcoe on a ethernet interface."); | |
1875f27e RL |
130 | |
131 | /* notification function for packets from net device */ | |
85b4aa49 RL |
132 | static struct notifier_block fcoe_notifier = { |
133 | .notifier_call = fcoe_device_notification, | |
134 | }; | |
135 | ||
1875f27e RL |
136 | /* notification function for CPU hotplug events */ |
137 | static struct notifier_block fcoe_cpu_notifier = { | |
138 | .notifier_call = fcoe_cpu_callback, | |
139 | }; | |
140 | ||
e9084bb8 CL |
141 | static struct scsi_transport_template *fcoe_transport_template; |
142 | static struct scsi_transport_template *fcoe_vport_transport_template; | |
7f349142 | 143 | |
1875f27e RL |
144 | static int fcoe_vport_destroy(struct fc_vport *); |
145 | static int fcoe_vport_create(struct fc_vport *, bool disabled); | |
146 | static int fcoe_vport_disable(struct fc_vport *, bool disable); | |
147 | static void fcoe_set_vport_symbolic_name(struct fc_vport *); | |
148 | ||
149 | static struct libfc_function_template fcoe_libfc_fcn_templ = { | |
150 | .frame_send = fcoe_xmit, | |
151 | .ddp_setup = fcoe_ddp_setup, | |
152 | .ddp_done = fcoe_ddp_done, | |
153 | .elsct_send = fcoe_elsct_send, | |
b84056bf | 154 | .get_lesb = fcoe_get_lesb, |
1875f27e | 155 | }; |
9a05753b | 156 | |
7f349142 VD |
157 | struct fc_function_template fcoe_transport_function = { |
158 | .show_host_node_name = 1, | |
159 | .show_host_port_name = 1, | |
160 | .show_host_supported_classes = 1, | |
161 | .show_host_supported_fc4s = 1, | |
162 | .show_host_active_fc4s = 1, | |
163 | .show_host_maxframe_size = 1, | |
164 | ||
165 | .show_host_port_id = 1, | |
166 | .show_host_supported_speeds = 1, | |
167 | .get_host_speed = fc_get_host_speed, | |
168 | .show_host_speed = 1, | |
169 | .show_host_port_type = 1, | |
170 | .get_host_port_state = fc_get_host_port_state, | |
171 | .show_host_port_state = 1, | |
172 | .show_host_symbolic_name = 1, | |
173 | ||
174 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
175 | .show_rport_maxframe_size = 1, | |
176 | .show_rport_supported_classes = 1, | |
177 | ||
178 | .show_host_fabric_name = 1, | |
179 | .show_starget_node_name = 1, | |
180 | .show_starget_port_name = 1, | |
181 | .show_starget_port_id = 1, | |
182 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
183 | .show_rport_dev_loss_tmo = 1, | |
184 | .get_fc_host_stats = fc_get_host_stats, | |
185 | .issue_fc_host_lip = fcoe_reset, | |
186 | ||
187 | .terminate_rport_io = fc_rport_terminate_io, | |
9a05753b CL |
188 | |
189 | .vport_create = fcoe_vport_create, | |
190 | .vport_delete = fcoe_vport_destroy, | |
191 | .vport_disable = fcoe_vport_disable, | |
dc8596d3 | 192 | .set_vport_symbolic_name = fcoe_set_vport_symbolic_name, |
a51ab396 SM |
193 | |
194 | .bsg_request = fc_lport_bsg_request, | |
7f349142 VD |
195 | }; |
196 | ||
e9084bb8 CL |
197 | struct fc_function_template fcoe_vport_transport_function = { |
198 | .show_host_node_name = 1, | |
199 | .show_host_port_name = 1, | |
200 | .show_host_supported_classes = 1, | |
201 | .show_host_supported_fc4s = 1, | |
202 | .show_host_active_fc4s = 1, | |
203 | .show_host_maxframe_size = 1, | |
204 | ||
205 | .show_host_port_id = 1, | |
206 | .show_host_supported_speeds = 1, | |
207 | .get_host_speed = fc_get_host_speed, | |
208 | .show_host_speed = 1, | |
209 | .show_host_port_type = 1, | |
210 | .get_host_port_state = fc_get_host_port_state, | |
211 | .show_host_port_state = 1, | |
212 | .show_host_symbolic_name = 1, | |
213 | ||
214 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
215 | .show_rport_maxframe_size = 1, | |
216 | .show_rport_supported_classes = 1, | |
217 | ||
218 | .show_host_fabric_name = 1, | |
219 | .show_starget_node_name = 1, | |
220 | .show_starget_port_name = 1, | |
221 | .show_starget_port_id = 1, | |
222 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
223 | .show_rport_dev_loss_tmo = 1, | |
224 | .get_fc_host_stats = fc_get_host_stats, | |
225 | .issue_fc_host_lip = fcoe_reset, | |
226 | ||
227 | .terminate_rport_io = fc_rport_terminate_io, | |
a51ab396 SM |
228 | |
229 | .bsg_request = fc_lport_bsg_request, | |
e9084bb8 CL |
230 | }; |
231 | ||
7f349142 VD |
232 | static struct scsi_host_template fcoe_shost_template = { |
233 | .module = THIS_MODULE, | |
234 | .name = "FCoE Driver", | |
235 | .proc_name = FCOE_NAME, | |
236 | .queuecommand = fc_queuecommand, | |
237 | .eh_abort_handler = fc_eh_abort, | |
238 | .eh_device_reset_handler = fc_eh_device_reset, | |
239 | .eh_host_reset_handler = fc_eh_host_reset, | |
240 | .slave_alloc = fc_slave_alloc, | |
241 | .change_queue_depth = fc_change_queue_depth, | |
242 | .change_queue_type = fc_change_queue_type, | |
243 | .this_id = -1, | |
14caf44c | 244 | .cmd_per_lun = 3, |
7f349142 VD |
245 | .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, |
246 | .use_clustering = ENABLE_CLUSTERING, | |
247 | .sg_tablesize = SG_ALL, | |
248 | .max_sectors = 0xffff, | |
249 | }; | |
250 | ||
54b649f8 | 251 | /** |
1875f27e RL |
252 | * fcoe_interface_setup() - Setup a FCoE interface |
253 | * @fcoe: The new FCoE interface | |
254 | * @netdev: The net device that the fcoe interface is on | |
54b649f8 CL |
255 | * |
256 | * Returns : 0 for success | |
2e70e241 | 257 | * Locking: must be called with the RTNL mutex held |
54b649f8 CL |
258 | */ |
259 | static int fcoe_interface_setup(struct fcoe_interface *fcoe, | |
260 | struct net_device *netdev) | |
261 | { | |
262 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
263 | struct netdev_hw_addr *ha; | |
5bab87e6 | 264 | struct net_device *real_dev; |
54b649f8 | 265 | u8 flogi_maddr[ETH_ALEN]; |
b7a727f1 | 266 | const struct net_device_ops *ops; |
54b649f8 CL |
267 | |
268 | fcoe->netdev = netdev; | |
269 | ||
b7a727f1 YZ |
270 | /* Let LLD initialize for FCoE */ |
271 | ops = netdev->netdev_ops; | |
272 | if (ops->ndo_fcoe_enable) { | |
273 | if (ops->ndo_fcoe_enable(netdev)) | |
274 | FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE" | |
275 | " specific feature for LLD.\n"); | |
276 | } | |
277 | ||
54b649f8 CL |
278 | /* Do not support for bonding device */ |
279 | if ((netdev->priv_flags & IFF_MASTER_ALB) || | |
280 | (netdev->priv_flags & IFF_SLAVE_INACTIVE) || | |
281 | (netdev->priv_flags & IFF_MASTER_8023AD)) { | |
59d92516 | 282 | FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n"); |
54b649f8 CL |
283 | return -EOPNOTSUPP; |
284 | } | |
285 | ||
286 | /* look for SAN MAC address, if multiple SAN MACs exist, only | |
287 | * use the first one for SPMA */ | |
5bab87e6 YZ |
288 | real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ? |
289 | vlan_dev_real_dev(netdev) : netdev; | |
54b649f8 | 290 | rcu_read_lock(); |
5bab87e6 | 291 | for_each_dev_addr(real_dev, ha) { |
54b649f8 | 292 | if ((ha->type == NETDEV_HW_ADDR_T_SAN) && |
bf361707 | 293 | (is_valid_ether_addr(ha->addr))) { |
54b649f8 CL |
294 | memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); |
295 | fip->spma = 1; | |
296 | break; | |
297 | } | |
298 | } | |
299 | rcu_read_unlock(); | |
300 | ||
301 | /* setup Source Mac Address */ | |
302 | if (!fip->spma) | |
303 | memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); | |
304 | ||
305 | /* | |
306 | * Add FCoE MAC address as second unicast MAC address | |
307 | * or enter promiscuous mode if not capable of listening | |
308 | * for multiple unicast MACs. | |
309 | */ | |
54b649f8 CL |
310 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
311 | dev_unicast_add(netdev, flogi_maddr); | |
312 | if (fip->spma) | |
313 | dev_unicast_add(netdev, fip->ctl_src_addr); | |
314 | dev_mc_add(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0); | |
54b649f8 CL |
315 | |
316 | /* | |
317 | * setup the receive function from ethernet driver | |
318 | * on the ethertype for the given device | |
319 | */ | |
320 | fcoe->fcoe_packet_type.func = fcoe_rcv; | |
321 | fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE); | |
322 | fcoe->fcoe_packet_type.dev = netdev; | |
323 | dev_add_pack(&fcoe->fcoe_packet_type); | |
324 | ||
325 | fcoe->fip_packet_type.func = fcoe_fip_recv; | |
326 | fcoe->fip_packet_type.type = htons(ETH_P_FIP); | |
327 | fcoe->fip_packet_type.dev = netdev; | |
328 | dev_add_pack(&fcoe->fip_packet_type); | |
329 | ||
330 | return 0; | |
331 | } | |
332 | ||
030f4e00 | 333 | /** |
1875f27e RL |
334 | * fcoe_interface_create() - Create a FCoE interface on a net device |
335 | * @netdev: The net device to create the FCoE interface on | |
030f4e00 CL |
336 | * |
337 | * Returns: pointer to a struct fcoe_interface or NULL on error | |
338 | */ | |
339 | static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev) | |
340 | { | |
341 | struct fcoe_interface *fcoe; | |
59d92516 | 342 | int err; |
030f4e00 CL |
343 | |
344 | fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL); | |
345 | if (!fcoe) { | |
346 | FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n"); | |
347 | return NULL; | |
348 | } | |
349 | ||
2e70e241 | 350 | dev_hold(netdev); |
030f4e00 | 351 | kref_init(&fcoe->kref); |
54b649f8 CL |
352 | |
353 | /* | |
354 | * Initialize FIP. | |
355 | */ | |
356 | fcoe_ctlr_init(&fcoe->ctlr); | |
357 | fcoe->ctlr.send = fcoe_fip_send; | |
358 | fcoe->ctlr.update_mac = fcoe_update_src_mac; | |
11b56188 | 359 | fcoe->ctlr.get_src_addr = fcoe_get_src_mac; |
54b649f8 | 360 | |
59d92516 | 361 | err = fcoe_interface_setup(fcoe, netdev); |
362 | if (err) { | |
363 | fcoe_ctlr_destroy(&fcoe->ctlr); | |
364 | kfree(fcoe); | |
365 | dev_put(netdev); | |
366 | return NULL; | |
367 | } | |
030f4e00 CL |
368 | |
369 | return fcoe; | |
370 | } | |
371 | ||
54b649f8 | 372 | /** |
1875f27e RL |
373 | * fcoe_interface_cleanup() - Clean up a FCoE interface |
374 | * @fcoe: The FCoE interface to be cleaned up | |
2e70e241 CL |
375 | * |
376 | * Caller must be holding the RTNL mutex | |
54b649f8 CL |
377 | */ |
378 | void fcoe_interface_cleanup(struct fcoe_interface *fcoe) | |
379 | { | |
380 | struct net_device *netdev = fcoe->netdev; | |
381 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
382 | u8 flogi_maddr[ETH_ALEN]; | |
b7a727f1 | 383 | const struct net_device_ops *ops; |
54b649f8 CL |
384 | |
385 | /* | |
386 | * Don't listen for Ethernet packets anymore. | |
387 | * synchronize_net() ensures that the packet handlers are not running | |
388 | * on another CPU. dev_remove_pack() would do that, this calls the | |
389 | * unsyncronized version __dev_remove_pack() to avoid multiple delays. | |
390 | */ | |
391 | __dev_remove_pack(&fcoe->fcoe_packet_type); | |
392 | __dev_remove_pack(&fcoe->fip_packet_type); | |
393 | synchronize_net(); | |
394 | ||
54b649f8 | 395 | /* Delete secondary MAC addresses */ |
54b649f8 CL |
396 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
397 | dev_unicast_delete(netdev, flogi_maddr); | |
54b649f8 CL |
398 | if (fip->spma) |
399 | dev_unicast_delete(netdev, fip->ctl_src_addr); | |
400 | dev_mc_delete(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0); | |
b7a727f1 YZ |
401 | |
402 | /* Tell the LLD we are done w/ FCoE */ | |
403 | ops = netdev->netdev_ops; | |
404 | if (ops->ndo_fcoe_disable) { | |
405 | if (ops->ndo_fcoe_disable(netdev)) | |
406 | FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" | |
407 | " specific feature for LLD.\n"); | |
408 | } | |
54b649f8 CL |
409 | } |
410 | ||
030f4e00 CL |
411 | /** |
412 | * fcoe_interface_release() - fcoe_port kref release function | |
1875f27e | 413 | * @kref: Embedded reference count in an fcoe_interface struct |
030f4e00 CL |
414 | */ |
415 | static void fcoe_interface_release(struct kref *kref) | |
416 | { | |
417 | struct fcoe_interface *fcoe; | |
2e70e241 | 418 | struct net_device *netdev; |
030f4e00 CL |
419 | |
420 | fcoe = container_of(kref, struct fcoe_interface, kref); | |
2e70e241 CL |
421 | netdev = fcoe->netdev; |
422 | /* tear-down the FCoE controller */ | |
423 | fcoe_ctlr_destroy(&fcoe->ctlr); | |
030f4e00 | 424 | kfree(fcoe); |
2e70e241 | 425 | dev_put(netdev); |
030f4e00 CL |
426 | } |
427 | ||
428 | /** | |
1875f27e RL |
429 | * fcoe_interface_get() - Get a reference to a FCoE interface |
430 | * @fcoe: The FCoE interface to be held | |
030f4e00 CL |
431 | */ |
432 | static inline void fcoe_interface_get(struct fcoe_interface *fcoe) | |
433 | { | |
434 | kref_get(&fcoe->kref); | |
435 | } | |
436 | ||
437 | /** | |
1875f27e RL |
438 | * fcoe_interface_put() - Put a reference to a FCoE interface |
439 | * @fcoe: The FCoE interface to be released | |
030f4e00 CL |
440 | */ |
441 | static inline void fcoe_interface_put(struct fcoe_interface *fcoe) | |
442 | { | |
443 | kref_put(&fcoe->kref, fcoe_interface_release); | |
444 | } | |
445 | ||
ab6b85c1 | 446 | /** |
1875f27e RL |
447 | * fcoe_fip_recv() - Handler for received FIP frames |
448 | * @skb: The receive skb | |
449 | * @netdev: The associated net device | |
450 | * @ptype: The packet_type structure which was used to register this handler | |
451 | * @orig_dev: The original net_device the the skb was received on. | |
452 | * (in case dev is a bond) | |
ab6b85c1 VD |
453 | * |
454 | * Returns: 0 for success | |
455 | */ | |
1875f27e | 456 | static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, |
ab6b85c1 VD |
457 | struct packet_type *ptype, |
458 | struct net_device *orig_dev) | |
459 | { | |
259ad85d | 460 | struct fcoe_interface *fcoe; |
ab6b85c1 | 461 | |
259ad85d | 462 | fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); |
3fe9a0ba | 463 | fcoe_ctlr_recv(&fcoe->ctlr, skb); |
ab6b85c1 VD |
464 | return 0; |
465 | } | |
466 | ||
467 | /** | |
1875f27e RL |
468 | * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame |
469 | * @fip: The FCoE controller | |
470 | * @skb: The FIP packet to be sent | |
ab6b85c1 VD |
471 | */ |
472 | static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
473 | { | |
3fe9a0ba | 474 | skb->dev = fcoe_from_ctlr(fip)->netdev; |
ab6b85c1 VD |
475 | dev_queue_xmit(skb); |
476 | } | |
477 | ||
478 | /** | |
1875f27e RL |
479 | * fcoe_update_src_mac() - Update the Ethernet MAC filters |
480 | * @lport: The local port to update the source MAC on | |
481 | * @addr: Unicast MAC address to add | |
ab6b85c1 VD |
482 | * |
483 | * Remove any previously-set unicast MAC filter. | |
484 | * Add secondary FCoE MAC address filter for our OUI. | |
485 | */ | |
11b56188 | 486 | static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) |
ab6b85c1 | 487 | { |
11b56188 CL |
488 | struct fcoe_port *port = lport_priv(lport); |
489 | struct fcoe_interface *fcoe = port->fcoe; | |
25024989 | 490 | |
ab6b85c1 | 491 | rtnl_lock(); |
11b56188 CL |
492 | if (!is_zero_ether_addr(port->data_src_addr)) |
493 | dev_unicast_delete(fcoe->netdev, port->data_src_addr); | |
494 | if (!is_zero_ether_addr(addr)) | |
495 | dev_unicast_add(fcoe->netdev, addr); | |
496 | memcpy(port->data_src_addr, addr, ETH_ALEN); | |
ab6b85c1 VD |
497 | rtnl_unlock(); |
498 | } | |
499 | ||
11b56188 CL |
500 | /** |
501 | * fcoe_get_src_mac() - return the Ethernet source address for an lport | |
502 | * @lport: libfc lport | |
503 | */ | |
504 | static u8 *fcoe_get_src_mac(struct fc_lport *lport) | |
505 | { | |
506 | struct fcoe_port *port = lport_priv(lport); | |
507 | ||
508 | return port->data_src_addr; | |
509 | } | |
510 | ||
7f349142 | 511 | /** |
1875f27e RL |
512 | * fcoe_lport_config() - Set up a local port |
513 | * @lport: The local port to be setup | |
7f349142 VD |
514 | * |
515 | * Returns: 0 for success | |
516 | */ | |
1875f27e | 517 | static int fcoe_lport_config(struct fc_lport *lport) |
7f349142 | 518 | { |
1875f27e RL |
519 | lport->link_up = 0; |
520 | lport->qfull = 0; | |
521 | lport->max_retry_count = 3; | |
522 | lport->max_rport_retry_count = 3; | |
523 | lport->e_d_tov = 2 * 1000; /* FC-FS default */ | |
524 | lport->r_a_tov = 2 * 2 * 1000; | |
525 | lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | | |
526 | FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); | |
527 | lport->does_npiv = 1; | |
528 | ||
529 | fc_lport_init_stats(lport); | |
7f349142 VD |
530 | |
531 | /* lport fc_lport related configuration */ | |
1875f27e | 532 | fc_lport_config(lport); |
7f349142 VD |
533 | |
534 | /* offload related configuration */ | |
1875f27e RL |
535 | lport->crc_offload = 0; |
536 | lport->seq_offload = 0; | |
537 | lport->lro_enabled = 0; | |
538 | lport->lro_xid = 0; | |
539 | lport->lso_max = 0; | |
7f349142 VD |
540 | |
541 | return 0; | |
542 | } | |
543 | ||
1047f221 | 544 | /** |
1875f27e RL |
545 | * fcoe_queue_timer() - The fcoe queue timer |
546 | * @lport: The local port | |
1047f221 VD |
547 | * |
548 | * Calls fcoe_check_wait_queue on timeout | |
1047f221 | 549 | */ |
1875f27e | 550 | static void fcoe_queue_timer(ulong lport) |
1047f221 | 551 | { |
1875f27e | 552 | fcoe_check_wait_queue((struct fc_lport *)lport, NULL); |
1047f221 VD |
553 | } |
554 | ||
dcece412 YZ |
555 | /** |
556 | * fcoe_get_wwn() - Get the world wide name from LLD if it supports it | |
557 | * @netdev: the associated net device | |
558 | * @wwn: the output WWN | |
559 | * @type: the type of WWN (WWPN or WWNN) | |
560 | * | |
561 | * Returns: 0 for success | |
562 | */ | |
563 | static int fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type) | |
564 | { | |
565 | const struct net_device_ops *ops = netdev->netdev_ops; | |
566 | ||
567 | if (ops->ndo_fcoe_get_wwn) | |
568 | return ops->ndo_fcoe_get_wwn(netdev, wwn, type); | |
569 | return -EINVAL; | |
570 | } | |
571 | ||
7f349142 | 572 | /** |
1875f27e RL |
573 | * fcoe_netdev_config() - Set up net devive for SW FCoE |
574 | * @lport: The local port that is associated with the net device | |
575 | * @netdev: The associated net device | |
7f349142 | 576 | * |
1875f27e | 577 | * Must be called after fcoe_lport_config() as it will use local port mutex |
7f349142 | 578 | * |
1875f27e | 579 | * Returns: 0 for success |
7f349142 | 580 | */ |
1875f27e | 581 | static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) |
7f349142 VD |
582 | { |
583 | u32 mfs; | |
584 | u64 wwnn, wwpn; | |
25024989 | 585 | struct fcoe_interface *fcoe; |
014f5c3f | 586 | struct fcoe_port *port; |
cc0136c2 | 587 | int vid = 0; |
7f349142 VD |
588 | |
589 | /* Setup lport private data to point to fcoe softc */ | |
1875f27e | 590 | port = lport_priv(lport); |
25024989 | 591 | fcoe = port->fcoe; |
7f349142 VD |
592 | |
593 | /* | |
594 | * Determine max frame size based on underlying device and optional | |
595 | * user-configured limit. If the MFS is too low, fcoe_link_ok() | |
596 | * will return 0, so do this first. | |
597 | */ | |
7221d7e5 YZ |
598 | mfs = netdev->mtu; |
599 | if (netdev->features & NETIF_F_FCOE_MTU) { | |
600 | mfs = FCOE_MTU; | |
601 | FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); | |
602 | } | |
603 | mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); | |
1875f27e | 604 | if (fc_set_mfs(lport, mfs)) |
7f349142 VD |
605 | return -EINVAL; |
606 | ||
7f349142 | 607 | /* offload features support */ |
1d1b88dc | 608 | if (netdev->features & NETIF_F_SG) |
1875f27e | 609 | lport->sg_supp = 1; |
7f349142 | 610 | |
7f349142 | 611 | if (netdev->features & NETIF_F_FCOE_CRC) { |
1875f27e | 612 | lport->crc_offload = 1; |
d5488eb9 | 613 | FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); |
7f349142 | 614 | } |
7f349142 | 615 | if (netdev->features & NETIF_F_FSO) { |
1875f27e RL |
616 | lport->seq_offload = 1; |
617 | lport->lso_max = netdev->gso_max_size; | |
d5488eb9 | 618 | FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", |
1875f27e | 619 | lport->lso_max); |
7f349142 | 620 | } |
7f349142 | 621 | if (netdev->fcoe_ddp_xid) { |
1875f27e RL |
622 | lport->lro_enabled = 1; |
623 | lport->lro_xid = netdev->fcoe_ddp_xid; | |
d5488eb9 | 624 | FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", |
1875f27e | 625 | lport->lro_xid); |
7f349142 | 626 | } |
014f5c3f CL |
627 | skb_queue_head_init(&port->fcoe_pending_queue); |
628 | port->fcoe_pending_queue_active = 0; | |
1875f27e | 629 | setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport); |
7f349142 | 630 | |
1875f27e | 631 | if (!lport->vport) { |
cc0136c2 YZ |
632 | /* |
633 | * Use NAA 1&2 (FC-FS Rev. 2.0, Sec. 15) to generate WWNN/WWPN: | |
634 | * For WWNN, we use NAA 1 w/ bit 27-16 of word 0 as 0. | |
635 | * For WWPN, we use NAA 2 w/ bit 27-16 of word 0 from VLAN ID | |
636 | */ | |
637 | if (netdev->priv_flags & IFF_802_1Q_VLAN) | |
638 | vid = vlan_dev_vlan_id(netdev); | |
dcece412 YZ |
639 | |
640 | if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN)) | |
641 | wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0); | |
1875f27e | 642 | fc_set_wwnn(lport, wwnn); |
dcece412 YZ |
643 | if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN)) |
644 | wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, | |
645 | 2, vid); | |
1875f27e | 646 | fc_set_wwpn(lport, wwpn); |
9a05753b | 647 | } |
7f349142 | 648 | |
7f349142 VD |
649 | return 0; |
650 | } | |
651 | ||
652 | /** | |
1875f27e RL |
653 | * fcoe_shost_config() - Set up the SCSI host associated with a local port |
654 | * @lport: The local port | |
655 | * @shost: The SCSI host to associate with the local port | |
656 | * @dev: The device associated with the SCSI host | |
7f349142 VD |
657 | * |
658 | * Must be called after fcoe_lport_config() and fcoe_netdev_config() | |
659 | * | |
1875f27e | 660 | * Returns: 0 for success |
7f349142 | 661 | */ |
1875f27e RL |
662 | static int fcoe_shost_config(struct fc_lport *lport, struct Scsi_Host *shost, |
663 | struct device *dev) | |
7f349142 VD |
664 | { |
665 | int rc = 0; | |
666 | ||
667 | /* lport scsi host config */ | |
1875f27e RL |
668 | lport->host->max_lun = FCOE_MAX_LUN; |
669 | lport->host->max_id = FCOE_MAX_FCP_TARGET; | |
670 | lport->host->max_channel = 0; | |
671 | if (lport->vport) | |
672 | lport->host->transportt = fcoe_vport_transport_template; | |
e9084bb8 | 673 | else |
1875f27e | 674 | lport->host->transportt = fcoe_transport_template; |
7f349142 VD |
675 | |
676 | /* add the new host to the SCSI-ml */ | |
1875f27e | 677 | rc = scsi_add_host(lport->host, dev); |
7f349142 | 678 | if (rc) { |
1875f27e | 679 | FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " |
d5488eb9 | 680 | "error on scsi_add_host\n"); |
7f349142 VD |
681 | return rc; |
682 | } | |
9a05753b | 683 | |
1875f27e RL |
684 | if (!lport->vport) |
685 | fc_host_max_npiv_vports(lport->host) = USHORT_MAX; | |
9a05753b | 686 | |
1875f27e | 687 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, |
5baa17c3 | 688 | "%s v%s over %s", FCOE_NAME, FCOE_VERSION, |
1875f27e | 689 | fcoe_netdev(lport)->name); |
7f349142 VD |
690 | |
691 | return 0; | |
692 | } | |
693 | ||
1875f27e RL |
694 | /** |
695 | * fcoe_oem_match() - The match routine for the offloaded exchange manager | |
696 | * @fp: The I/O frame | |
d7179680 | 697 | * |
1875f27e RL |
698 | * This routine will be associated with an exchange manager (EM). When |
699 | * the libfc exchange handling code is looking for an EM to use it will | |
700 | * call this routine and pass it the frame that it wishes to send. This | |
701 | * routine will return True if the associated EM is to be used and False | |
702 | * if the echange code should continue looking for an EM. | |
703 | * | |
704 | * The offload EM that this routine is associated with will handle any | |
705 | * packets that are for SCSI read requests. | |
706 | * | |
707 | * Returns: True for read types I/O, otherwise returns false. | |
d7179680 VD |
708 | */ |
709 | bool fcoe_oem_match(struct fc_frame *fp) | |
710 | { | |
05cc7390 YZ |
711 | return fc_fcp_is_read(fr_fsp(fp)) && |
712 | (fr_fsp(fp)->data_len > fcoe_ddp_min); | |
d7179680 VD |
713 | } |
714 | ||
7f349142 | 715 | /** |
1875f27e RL |
716 | * fcoe_em_config() - Allocate and configure an exchange manager |
717 | * @lport: The local port that the new EM will be associated with | |
7f349142 | 718 | * |
1875f27e | 719 | * Returns: 0 on success |
7f349142 | 720 | */ |
1875f27e | 721 | static inline int fcoe_em_config(struct fc_lport *lport) |
7f349142 | 722 | { |
1875f27e | 723 | struct fcoe_port *port = lport_priv(lport); |
25024989 CL |
724 | struct fcoe_interface *fcoe = port->fcoe; |
725 | struct fcoe_interface *oldfcoe = NULL; | |
1d1b88dc | 726 | struct net_device *old_real_dev, *cur_real_dev; |
d7179680 VD |
727 | u16 min_xid = FCOE_MIN_XID; |
728 | u16 max_xid = FCOE_MAX_XID; | |
729 | ||
730 | /* | |
731 | * Check if need to allocate an em instance for | |
732 | * offload exchange ids to be shared across all VN_PORTs/lport. | |
733 | */ | |
1875f27e RL |
734 | if (!lport->lro_enabled || !lport->lro_xid || |
735 | (lport->lro_xid >= max_xid)) { | |
736 | lport->lro_xid = 0; | |
d7179680 VD |
737 | goto skip_oem; |
738 | } | |
739 | ||
740 | /* | |
741 | * Reuse existing offload em instance in case | |
1d1b88dc | 742 | * it is already allocated on real eth device |
d7179680 | 743 | */ |
25024989 CL |
744 | if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
745 | cur_real_dev = vlan_dev_real_dev(fcoe->netdev); | |
1d1b88dc | 746 | else |
25024989 | 747 | cur_real_dev = fcoe->netdev; |
1d1b88dc | 748 | |
25024989 | 749 | list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { |
25024989 CL |
750 | if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
751 | old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); | |
1d1b88dc | 752 | else |
25024989 | 753 | old_real_dev = oldfcoe->netdev; |
1d1b88dc VD |
754 | |
755 | if (cur_real_dev == old_real_dev) { | |
991cbb60 | 756 | fcoe->oem = oldfcoe->oem; |
d7179680 VD |
757 | break; |
758 | } | |
759 | } | |
760 | ||
991cbb60 | 761 | if (fcoe->oem) { |
1875f27e | 762 | if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { |
d7179680 VD |
763 | printk(KERN_ERR "fcoe_em_config: failed to add " |
764 | "offload em:%p on interface:%s\n", | |
991cbb60 | 765 | fcoe->oem, fcoe->netdev->name); |
d7179680 VD |
766 | return -ENOMEM; |
767 | } | |
768 | } else { | |
1875f27e RL |
769 | fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, |
770 | FCOE_MIN_XID, lport->lro_xid, | |
771 | fcoe_oem_match); | |
991cbb60 | 772 | if (!fcoe->oem) { |
d7179680 VD |
773 | printk(KERN_ERR "fcoe_em_config: failed to allocate " |
774 | "em for offload exches on interface:%s\n", | |
25024989 | 775 | fcoe->netdev->name); |
d7179680 VD |
776 | return -ENOMEM; |
777 | } | |
778 | } | |
779 | ||
780 | /* | |
781 | * Exclude offload EM xid range from next EM xid range. | |
782 | */ | |
1875f27e | 783 | min_xid += lport->lro_xid + 1; |
d7179680 VD |
784 | |
785 | skip_oem: | |
1875f27e | 786 | if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { |
d7179680 | 787 | printk(KERN_ERR "fcoe_em_config: failed to " |
25024989 | 788 | "allocate em on interface %s\n", fcoe->netdev->name); |
7f349142 | 789 | return -ENOMEM; |
d7179680 | 790 | } |
7f349142 VD |
791 | |
792 | return 0; | |
793 | } | |
794 | ||
795 | /** | |
1875f27e RL |
796 | * fcoe_if_destroy() - Tear down a SW FCoE instance |
797 | * @lport: The local port to be destroyed | |
7f349142 | 798 | */ |
af7f85d9 | 799 | static void fcoe_if_destroy(struct fc_lport *lport) |
7f349142 | 800 | { |
014f5c3f CL |
801 | struct fcoe_port *port = lport_priv(lport); |
802 | struct fcoe_interface *fcoe = port->fcoe; | |
25024989 | 803 | struct net_device *netdev = fcoe->netdev; |
7f349142 | 804 | |
d5488eb9 | 805 | FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); |
7f349142 | 806 | |
7f349142 | 807 | /* Logout of the fabric */ |
af7f85d9 | 808 | fc_fabric_logoff(lport); |
7f349142 | 809 | |
54b649f8 CL |
810 | /* Cleanup the fc_lport */ |
811 | fc_lport_destroy(lport); | |
812 | fc_fcp_destroy(lport); | |
813 | ||
814 | /* Stop the transmit retry timer */ | |
815 | del_timer_sync(&port->timer); | |
ab6b85c1 | 816 | |
54b649f8 CL |
817 | /* Free existing transmit skbs */ |
818 | fcoe_clean_pending_queue(lport); | |
819 | ||
11b56188 CL |
820 | rtnl_lock(); |
821 | if (!is_zero_ether_addr(port->data_src_addr)) | |
822 | dev_unicast_delete(netdev, port->data_src_addr); | |
823 | rtnl_unlock(); | |
824 | ||
54b649f8 CL |
825 | /* receives may not be stopped until after this */ |
826 | fcoe_interface_put(fcoe); | |
7f349142 | 827 | |
f161fb72 | 828 | /* Free queued packets for the per-CPU receive threads */ |
af7f85d9 | 829 | fcoe_percpu_clean(lport); |
f161fb72 | 830 | |
7f349142 | 831 | /* Detach from the scsi-ml */ |
af7f85d9 CL |
832 | fc_remove_host(lport->host); |
833 | scsi_remove_host(lport->host); | |
7f349142 VD |
834 | |
835 | /* There are no more rports or I/O, free the EM */ | |
af7f85d9 | 836 | fc_exch_mgr_free(lport); |
7f349142 | 837 | |
7f349142 | 838 | /* Free memory used by statistical counters */ |
af7f85d9 | 839 | fc_lport_free_stats(lport); |
7f349142 | 840 | |
2e70e241 | 841 | /* Release the Scsi_Host */ |
af7f85d9 | 842 | scsi_host_put(lport->host); |
7f349142 VD |
843 | } |
844 | ||
1875f27e RL |
845 | /** |
846 | * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device | |
847 | * @lport: The local port to setup DDP for | |
848 | * @xid: The exchange ID for this DDP transfer | |
849 | * @sgl: The scatterlist describing this transfer | |
850 | * @sgc: The number of sg items | |
7f349142 | 851 | * |
1875f27e | 852 | * Returns: 0 if the DDP context was not configured |
7f349142 | 853 | */ |
1875f27e RL |
854 | static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, |
855 | struct scatterlist *sgl, unsigned int sgc) | |
7f349142 | 856 | { |
1875f27e | 857 | struct net_device *netdev = fcoe_netdev(lport); |
7f349142 | 858 | |
1875f27e RL |
859 | if (netdev->netdev_ops->ndo_fcoe_ddp_setup) |
860 | return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, | |
861 | xid, sgl, | |
862 | sgc); | |
7f349142 VD |
863 | |
864 | return 0; | |
865 | } | |
866 | ||
1875f27e RL |
867 | /** |
868 | * fcoe_ddp_done() - Call a LLD's ddp_done through the net device | |
869 | * @lport: The local port to complete DDP on | |
870 | * @xid: The exchange ID for this DDP transfer | |
7f349142 | 871 | * |
1875f27e | 872 | * Returns: the length of data that have been completed by DDP |
7f349142 | 873 | */ |
1875f27e | 874 | static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) |
7f349142 | 875 | { |
1875f27e | 876 | struct net_device *netdev = fcoe_netdev(lport); |
7f349142 | 877 | |
1875f27e RL |
878 | if (netdev->netdev_ops->ndo_fcoe_ddp_done) |
879 | return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); | |
7f349142 VD |
880 | return 0; |
881 | } | |
882 | ||
7f349142 | 883 | /** |
1875f27e RL |
884 | * fcoe_if_create() - Create a FCoE instance on an interface |
885 | * @fcoe: The FCoE interface to create a local port on | |
886 | * @parent: The device pointer to be the parent in sysfs for the SCSI host | |
887 | * @npiv: Indicates if the port is a vport or not | |
7f349142 | 888 | * |
1875f27e | 889 | * Creates a fc_lport instance and a Scsi_Host instance and configure them. |
7f349142 | 890 | * |
1875f27e | 891 | * Returns: The allocated fc_lport or an error pointer |
7f349142 | 892 | */ |
030f4e00 | 893 | static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, |
9a05753b | 894 | struct device *parent, int npiv) |
7f349142 | 895 | { |
1875f27e | 896 | struct net_device *netdev = fcoe->netdev; |
af7f85d9 | 897 | struct fc_lport *lport = NULL; |
014f5c3f | 898 | struct fcoe_port *port; |
7f349142 | 899 | struct Scsi_Host *shost; |
1875f27e | 900 | int rc; |
9a05753b CL |
901 | /* |
902 | * parent is only a vport if npiv is 1, | |
903 | * but we'll only use vport in that case so go ahead and set it | |
904 | */ | |
905 | struct fc_vport *vport = dev_to_vport(parent); | |
7f349142 | 906 | |
d5488eb9 | 907 | FCOE_NETDEV_DBG(netdev, "Create Interface\n"); |
7f349142 | 908 | |
9a05753b CL |
909 | if (!npiv) { |
910 | lport = libfc_host_alloc(&fcoe_shost_template, | |
911 | sizeof(struct fcoe_port)); | |
912 | } else { | |
913 | lport = libfc_vport_create(vport, | |
914 | sizeof(struct fcoe_port)); | |
915 | } | |
86221969 | 916 | if (!lport) { |
d5488eb9 | 917 | FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); |
af7f85d9 | 918 | rc = -ENOMEM; |
030f4e00 | 919 | goto out; |
7f349142 | 920 | } |
86221969 | 921 | shost = lport->host; |
014f5c3f | 922 | port = lport_priv(lport); |
2e70e241 | 923 | port->lport = lport; |
014f5c3f | 924 | port->fcoe = fcoe; |
2e70e241 | 925 | INIT_WORK(&port->destroy_work, fcoe_destroy_work); |
7f349142 | 926 | |
1875f27e | 927 | /* configure a fc_lport including the exchange manager */ |
af7f85d9 | 928 | rc = fcoe_lport_config(lport); |
7f349142 | 929 | if (rc) { |
d5488eb9 RL |
930 | FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " |
931 | "interface\n"); | |
7f349142 VD |
932 | goto out_host_put; |
933 | } | |
934 | ||
9a05753b CL |
935 | if (npiv) { |
936 | FCOE_NETDEV_DBG(netdev, "Setting vport names, 0x%llX 0x%llX\n", | |
1875f27e | 937 | vport->node_name, vport->port_name); |
9a05753b CL |
938 | fc_set_wwnn(lport, vport->node_name); |
939 | fc_set_wwpn(lport, vport->port_name); | |
940 | } | |
941 | ||
ab6b85c1 | 942 | /* configure lport network properties */ |
af7f85d9 | 943 | rc = fcoe_netdev_config(lport, netdev); |
ab6b85c1 | 944 | if (rc) { |
d5488eb9 RL |
945 | FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " |
946 | "interface\n"); | |
54b649f8 | 947 | goto out_lp_destroy; |
ab6b85c1 | 948 | } |
97c8389d | 949 | |
7f349142 | 950 | /* configure lport scsi host properties */ |
af7f85d9 | 951 | rc = fcoe_shost_config(lport, shost, parent); |
7f349142 | 952 | if (rc) { |
d5488eb9 RL |
953 | FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " |
954 | "interface\n"); | |
54b649f8 | 955 | goto out_lp_destroy; |
7f349142 VD |
956 | } |
957 | ||
96316099 | 958 | /* Initialize the library */ |
af7f85d9 | 959 | rc = fcoe_libfc_config(lport, &fcoe_libfc_fcn_templ); |
7f349142 | 960 | if (rc) { |
96316099 | 961 | FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " |
d5488eb9 | 962 | "interface\n"); |
96316099 | 963 | goto out_lp_destroy; |
7f349142 VD |
964 | } |
965 | ||
9a05753b CL |
966 | if (!npiv) { |
967 | /* | |
968 | * fcoe_em_alloc() and fcoe_hostlist_add() both | |
969 | * need to be atomic with respect to other changes to the | |
970 | * hostlist since fcoe_em_alloc() looks for an existing EM | |
971 | * instance on host list updated by fcoe_hostlist_add(). | |
972 | * | |
973 | * This is currently handled through the fcoe_config_mutex | |
974 | * begin held. | |
975 | */ | |
c863df33 | 976 | |
9a05753b CL |
977 | /* lport exch manager allocation */ |
978 | rc = fcoe_em_config(lport); | |
979 | if (rc) { | |
980 | FCOE_NETDEV_DBG(netdev, "Could not configure the EM " | |
1875f27e | 981 | "for the interface\n"); |
9a05753b CL |
982 | goto out_lp_destroy; |
983 | } | |
7f349142 VD |
984 | } |
985 | ||
030f4e00 | 986 | fcoe_interface_get(fcoe); |
af7f85d9 | 987 | return lport; |
7f349142 VD |
988 | |
989 | out_lp_destroy: | |
af7f85d9 | 990 | fc_exch_mgr_free(lport); |
7f349142 | 991 | out_host_put: |
af7f85d9 CL |
992 | scsi_host_put(lport->host); |
993 | out: | |
994 | return ERR_PTR(rc); | |
7f349142 VD |
995 | } |
996 | ||
997 | /** | |
1875f27e | 998 | * fcoe_if_init() - Initialization routine for fcoe.ko |
7f349142 | 999 | * |
1875f27e RL |
1000 | * Attaches the SW FCoE transport to the FC transport |
1001 | * | |
1002 | * Returns: 0 on success | |
7f349142 VD |
1003 | */ |
1004 | static int __init fcoe_if_init(void) | |
1005 | { | |
1006 | /* attach to scsi transport */ | |
e9084bb8 CL |
1007 | fcoe_transport_template = fc_attach_transport(&fcoe_transport_function); |
1008 | fcoe_vport_transport_template = | |
1009 | fc_attach_transport(&fcoe_vport_transport_function); | |
7f349142 | 1010 | |
e9084bb8 | 1011 | if (!fcoe_transport_template) { |
d5488eb9 | 1012 | printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); |
7f349142 VD |
1013 | return -ENODEV; |
1014 | } | |
1015 | ||
1016 | return 0; | |
1017 | } | |
1018 | ||
1019 | /** | |
1875f27e RL |
1020 | * fcoe_if_exit() - Tear down fcoe.ko |
1021 | * | |
1022 | * Detaches the SW FCoE transport from the FC transport | |
7f349142 | 1023 | * |
1875f27e | 1024 | * Returns: 0 on success |
7f349142 VD |
1025 | */ |
1026 | int __exit fcoe_if_exit(void) | |
1027 | { | |
e9084bb8 CL |
1028 | fc_release_transport(fcoe_transport_template); |
1029 | fc_release_transport(fcoe_vport_transport_template); | |
1030 | fcoe_transport_template = NULL; | |
1031 | fcoe_vport_transport_template = NULL; | |
7f349142 VD |
1032 | return 0; |
1033 | } | |
1034 | ||
8976f424 | 1035 | /** |
1875f27e RL |
1036 | * fcoe_percpu_thread_create() - Create a receive thread for an online CPU |
1037 | * @cpu: The CPU index of the CPU to create a receive thread for | |
8976f424 RL |
1038 | */ |
1039 | static void fcoe_percpu_thread_create(unsigned int cpu) | |
1040 | { | |
1041 | struct fcoe_percpu_s *p; | |
1042 | struct task_struct *thread; | |
1043 | ||
1044 | p = &per_cpu(fcoe_percpu, cpu); | |
1045 | ||
1046 | thread = kthread_create(fcoe_percpu_receive_thread, | |
1047 | (void *)p, "fcoethread/%d", cpu); | |
1048 | ||
e7a51997 | 1049 | if (likely(!IS_ERR(thread))) { |
8976f424 RL |
1050 | kthread_bind(thread, cpu); |
1051 | wake_up_process(thread); | |
1052 | ||
1053 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1054 | p->thread = thread; | |
1055 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1056 | } | |
1057 | } | |
1058 | ||
1059 | /** | |
1875f27e RL |
1060 | * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU |
1061 | * @cpu: The CPU index of the CPU whose receive thread is to be destroyed | |
8976f424 RL |
1062 | * |
1063 | * Destroys a per-CPU Rx thread. Any pending skbs are moved to the | |
1064 | * current CPU's Rx thread. If the thread being destroyed is bound to | |
1065 | * the CPU processing this context the skbs will be freed. | |
1066 | */ | |
1067 | static void fcoe_percpu_thread_destroy(unsigned int cpu) | |
1068 | { | |
1069 | struct fcoe_percpu_s *p; | |
1070 | struct task_struct *thread; | |
1071 | struct page *crc_eof; | |
1072 | struct sk_buff *skb; | |
1073 | #ifdef CONFIG_SMP | |
1074 | struct fcoe_percpu_s *p0; | |
1075 | unsigned targ_cpu = smp_processor_id(); | |
1076 | #endif /* CONFIG_SMP */ | |
1077 | ||
d5488eb9 | 1078 | FCOE_DBG("Destroying receive thread for CPU %d\n", cpu); |
8976f424 RL |
1079 | |
1080 | /* Prevent any new skbs from being queued for this CPU. */ | |
1081 | p = &per_cpu(fcoe_percpu, cpu); | |
1082 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1083 | thread = p->thread; | |
1084 | p->thread = NULL; | |
1085 | crc_eof = p->crc_eof_page; | |
1086 | p->crc_eof_page = NULL; | |
1087 | p->crc_eof_offset = 0; | |
1088 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1089 | ||
1090 | #ifdef CONFIG_SMP | |
1091 | /* | |
1092 | * Don't bother moving the skb's if this context is running | |
1093 | * on the same CPU that is having its thread destroyed. This | |
1094 | * can easily happen when the module is removed. | |
1095 | */ | |
1096 | if (cpu != targ_cpu) { | |
1097 | p0 = &per_cpu(fcoe_percpu, targ_cpu); | |
1098 | spin_lock_bh(&p0->fcoe_rx_list.lock); | |
1099 | if (p0->thread) { | |
d5488eb9 RL |
1100 | FCOE_DBG("Moving frames from CPU %d to CPU %d\n", |
1101 | cpu, targ_cpu); | |
8976f424 RL |
1102 | |
1103 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1104 | __skb_queue_tail(&p0->fcoe_rx_list, skb); | |
1105 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
1106 | } else { | |
1107 | /* | |
1108 | * The targeted CPU is not initialized and cannot accept | |
1875f27e | 1109 | * new skbs. Unlock the targeted CPU and drop the skbs |
8976f424 RL |
1110 | * on the CPU that is going offline. |
1111 | */ | |
1112 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1113 | kfree_skb(skb); | |
1114 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
1115 | } | |
1116 | } else { | |
1117 | /* | |
1118 | * This scenario occurs when the module is being removed | |
1119 | * and all threads are being destroyed. skbs will continue | |
1120 | * to be shifted from the CPU thread that is being removed | |
1121 | * to the CPU thread associated with the CPU that is processing | |
1122 | * the module removal. Once there is only one CPU Rx thread it | |
1123 | * will reach this case and we will drop all skbs and later | |
1124 | * stop the thread. | |
1125 | */ | |
1126 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1127 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1128 | kfree_skb(skb); | |
1129 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1130 | } | |
1131 | #else | |
1132 | /* | |
dd3fd72e | 1133 | * This a non-SMP scenario where the singular Rx thread is |
8976f424 RL |
1134 | * being removed. Free all skbs and stop the thread. |
1135 | */ | |
1136 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1137 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1138 | kfree_skb(skb); | |
1139 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1140 | #endif | |
1141 | ||
1142 | if (thread) | |
1143 | kthread_stop(thread); | |
1144 | ||
1145 | if (crc_eof) | |
1146 | put_page(crc_eof); | |
1147 | } | |
1148 | ||
1149 | /** | |
1875f27e RL |
1150 | * fcoe_cpu_callback() - Handler for CPU hotplug events |
1151 | * @nfb: The callback data block | |
1152 | * @action: The event triggering the callback | |
1153 | * @hcpu: The index of the CPU that the event is for | |
8976f424 | 1154 | * |
1875f27e | 1155 | * This creates or destroys per-CPU data for fcoe |
8976f424 RL |
1156 | * |
1157 | * Returns NOTIFY_OK always. | |
1158 | */ | |
1159 | static int fcoe_cpu_callback(struct notifier_block *nfb, | |
1160 | unsigned long action, void *hcpu) | |
1161 | { | |
1162 | unsigned cpu = (unsigned long)hcpu; | |
1163 | ||
1164 | switch (action) { | |
1165 | case CPU_ONLINE: | |
1166 | case CPU_ONLINE_FROZEN: | |
d5488eb9 | 1167 | FCOE_DBG("CPU %x online: Create Rx thread\n", cpu); |
8976f424 RL |
1168 | fcoe_percpu_thread_create(cpu); |
1169 | break; | |
1170 | case CPU_DEAD: | |
1171 | case CPU_DEAD_FROZEN: | |
d5488eb9 | 1172 | FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu); |
8976f424 RL |
1173 | fcoe_percpu_thread_destroy(cpu); |
1174 | break; | |
1175 | default: | |
1176 | break; | |
1177 | } | |
1178 | return NOTIFY_OK; | |
1179 | } | |
1180 | ||
85b4aa49 | 1181 | /** |
1875f27e RL |
1182 | * fcoe_rcv() - Receive packets from a net device |
1183 | * @skb: The received packet | |
1184 | * @netdev: The net device that the packet was received on | |
1185 | * @ptype: The packet type context | |
1186 | * @olddev: The last device net device | |
85b4aa49 | 1187 | * |
1875f27e RL |
1188 | * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a |
1189 | * FC frame and passes the frame to libfc. | |
85b4aa49 RL |
1190 | * |
1191 | * Returns: 0 for success | |
34f42a07 | 1192 | */ |
1875f27e | 1193 | int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, |
85b4aa49 RL |
1194 | struct packet_type *ptype, struct net_device *olddev) |
1195 | { | |
1875f27e | 1196 | struct fc_lport *lport; |
85b4aa49 | 1197 | struct fcoe_rcv_info *fr; |
259ad85d | 1198 | struct fcoe_interface *fcoe; |
85b4aa49 | 1199 | struct fc_frame_header *fh; |
85b4aa49 | 1200 | struct fcoe_percpu_s *fps; |
b2f0091f | 1201 | unsigned int cpu; |
85b4aa49 | 1202 | |
259ad85d | 1203 | fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); |
1875f27e RL |
1204 | lport = fcoe->ctlr.lp; |
1205 | if (unlikely(!lport)) { | |
1206 | FCOE_NETDEV_DBG(netdev, "Cannot find hba structure"); | |
85b4aa49 RL |
1207 | goto err2; |
1208 | } | |
1875f27e | 1209 | if (!lport->link_up) |
97c8389d | 1210 | goto err2; |
85b4aa49 | 1211 | |
1875f27e | 1212 | FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p " |
d5488eb9 RL |
1213 | "data:%p tail:%p end:%p sum:%d dev:%s", |
1214 | skb->len, skb->data_len, skb->head, skb->data, | |
1215 | skb_tail_pointer(skb), skb_end_pointer(skb), | |
1216 | skb->csum, skb->dev ? skb->dev->name : "<NULL>"); | |
85b4aa49 RL |
1217 | |
1218 | /* check for FCOE packet type */ | |
1219 | if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) { | |
1875f27e | 1220 | FCOE_NETDEV_DBG(netdev, "Wrong FC type frame"); |
85b4aa49 RL |
1221 | goto err; |
1222 | } | |
1223 | ||
1224 | /* | |
1225 | * Check for minimum frame length, and make sure required FCoE | |
1226 | * and FC headers are pulled into the linear data area. | |
1227 | */ | |
1228 | if (unlikely((skb->len < FCOE_MIN_FRAME) || | |
1875f27e | 1229 | !pskb_may_pull(skb, FCOE_HEADER_LEN))) |
85b4aa49 RL |
1230 | goto err; |
1231 | ||
1232 | skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); | |
1233 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1234 | ||
85b4aa49 | 1235 | fr = fcoe_dev_from_skb(skb); |
1875f27e | 1236 | fr->fr_dev = lport; |
85b4aa49 | 1237 | fr->ptype = ptype; |
5e5e92df | 1238 | |
85b4aa49 | 1239 | /* |
b2f0091f VD |
1240 | * In case the incoming frame's exchange is originated from |
1241 | * the initiator, then received frame's exchange id is ANDed | |
1242 | * with fc_cpu_mask bits to get the same cpu on which exchange | |
1243 | * was originated, otherwise just use the current cpu. | |
85b4aa49 | 1244 | */ |
b2f0091f VD |
1245 | if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) |
1246 | cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; | |
1247 | else | |
1248 | cpu = smp_processor_id(); | |
5e5e92df | 1249 | |
8976f424 | 1250 | fps = &per_cpu(fcoe_percpu, cpu); |
85b4aa49 | 1251 | spin_lock_bh(&fps->fcoe_rx_list.lock); |
8976f424 RL |
1252 | if (unlikely(!fps->thread)) { |
1253 | /* | |
1254 | * The targeted CPU is not ready, let's target | |
1255 | * the first CPU now. For non-SMP systems this | |
1256 | * will check the same CPU twice. | |
1257 | */ | |
1875f27e | 1258 | FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread " |
d5488eb9 RL |
1259 | "ready for incoming skb- using first online " |
1260 | "CPU.\n"); | |
8976f424 RL |
1261 | |
1262 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
6957177f | 1263 | cpu = cpumask_first(cpu_online_mask); |
8976f424 RL |
1264 | fps = &per_cpu(fcoe_percpu, cpu); |
1265 | spin_lock_bh(&fps->fcoe_rx_list.lock); | |
1266 | if (!fps->thread) { | |
1267 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1268 | goto err; | |
1269 | } | |
1270 | } | |
1271 | ||
1272 | /* | |
1273 | * We now have a valid CPU that we're targeting for | |
1274 | * this skb. We also have this receive thread locked, | |
1275 | * so we're free to queue skbs into it's queue. | |
1276 | */ | |
85b4aa49 | 1277 | |
859b7b64 CL |
1278 | /* If this is a SCSI-FCP frame, and this is already executing on the |
1279 | * correct CPU, and the queue for this CPU is empty, then go ahead | |
1280 | * and process the frame directly in the softirq context. | |
1281 | * This lets us process completions without context switching from the | |
1282 | * NET_RX softirq, to our receive processing thread, and then back to | |
1283 | * BLOCK softirq context. | |
1284 | */ | |
1285 | if (fh->fh_type == FC_TYPE_FCP && | |
1286 | cpu == smp_processor_id() && | |
1287 | skb_queue_empty(&fps->fcoe_rx_list)) { | |
1288 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1289 | fcoe_recv_frame(skb); | |
1290 | } else { | |
1291 | __skb_queue_tail(&fps->fcoe_rx_list, skb); | |
1292 | if (fps->fcoe_rx_list.qlen == 1) | |
1293 | wake_up_process(fps->thread); | |
1294 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1295 | } | |
85b4aa49 RL |
1296 | |
1297 | return 0; | |
1298 | err: | |
1875f27e | 1299 | fc_lport_get_stats(lport)->ErrorFrames++; |
85b4aa49 RL |
1300 | |
1301 | err2: | |
1302 | kfree_skb(skb); | |
1303 | return -1; | |
1304 | } | |
85b4aa49 RL |
1305 | |
1306 | /** | |
1875f27e RL |
1307 | * fcoe_start_io() - Start FCoE I/O |
1308 | * @skb: The packet to be transmitted | |
1309 | * | |
1310 | * This routine is called from the net device to start transmitting | |
1311 | * FCoE packets. | |
85b4aa49 RL |
1312 | * |
1313 | * Returns: 0 for success | |
34f42a07 | 1314 | */ |
85b4aa49 RL |
1315 | static inline int fcoe_start_io(struct sk_buff *skb) |
1316 | { | |
18fa11ef | 1317 | struct sk_buff *nskb; |
85b4aa49 RL |
1318 | int rc; |
1319 | ||
18fa11ef CL |
1320 | nskb = skb_clone(skb, GFP_ATOMIC); |
1321 | rc = dev_queue_xmit(nskb); | |
85b4aa49 RL |
1322 | if (rc != 0) |
1323 | return rc; | |
1324 | kfree_skb(skb); | |
1325 | return 0; | |
1326 | } | |
1327 | ||
1328 | /** | |
1875f27e RL |
1329 | * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC |
1330 | * @skb: The packet to be transmitted | |
1331 | * @tlen: The total length of the trailer | |
1332 | * | |
1333 | * This routine allocates a page for frame trailers. The page is re-used if | |
1334 | * there is enough room left on it for the current trailer. If there isn't | |
1335 | * enough buffer left a new page is allocated for the trailer. Reference to | |
1336 | * the page from this function as well as the skbs using the page fragments | |
1337 | * ensure that the page is freed at the appropriate time. | |
85b4aa49 RL |
1338 | * |
1339 | * Returns: 0 for success | |
34f42a07 | 1340 | */ |
85b4aa49 RL |
1341 | static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen) |
1342 | { | |
1343 | struct fcoe_percpu_s *fps; | |
1344 | struct page *page; | |
85b4aa49 | 1345 | |
5e5e92df | 1346 | fps = &get_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1347 | page = fps->crc_eof_page; |
1348 | if (!page) { | |
1349 | page = alloc_page(GFP_ATOMIC); | |
1350 | if (!page) { | |
5e5e92df | 1351 | put_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1352 | return -ENOMEM; |
1353 | } | |
1354 | fps->crc_eof_page = page; | |
8976f424 | 1355 | fps->crc_eof_offset = 0; |
85b4aa49 RL |
1356 | } |
1357 | ||
1358 | get_page(page); | |
1359 | skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page, | |
1360 | fps->crc_eof_offset, tlen); | |
1361 | skb->len += tlen; | |
1362 | skb->data_len += tlen; | |
1363 | skb->truesize += tlen; | |
1364 | fps->crc_eof_offset += sizeof(struct fcoe_crc_eof); | |
1365 | ||
1366 | if (fps->crc_eof_offset >= PAGE_SIZE) { | |
1367 | fps->crc_eof_page = NULL; | |
1368 | fps->crc_eof_offset = 0; | |
1369 | put_page(page); | |
1370 | } | |
5e5e92df | 1371 | put_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1372 | return 0; |
1373 | } | |
1374 | ||
1375 | /** | |
1875f27e RL |
1376 | * fcoe_fc_crc() - Calculates the CRC for a given frame |
1377 | * @fp: The frame to be checksumed | |
85b4aa49 | 1378 | * |
1875f27e RL |
1379 | * This uses crc32() routine to calculate the CRC for a frame |
1380 | * | |
1381 | * Return: The 32 bit CRC value | |
34f42a07 | 1382 | */ |
85b4aa49 RL |
1383 | u32 fcoe_fc_crc(struct fc_frame *fp) |
1384 | { | |
1385 | struct sk_buff *skb = fp_skb(fp); | |
1386 | struct skb_frag_struct *frag; | |
1387 | unsigned char *data; | |
1388 | unsigned long off, len, clen; | |
1389 | u32 crc; | |
1390 | unsigned i; | |
1391 | ||
1392 | crc = crc32(~0, skb->data, skb_headlen(skb)); | |
1393 | ||
1394 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1395 | frag = &skb_shinfo(skb)->frags[i]; | |
1396 | off = frag->page_offset; | |
1397 | len = frag->size; | |
1398 | while (len > 0) { | |
1399 | clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK)); | |
1400 | data = kmap_atomic(frag->page + (off >> PAGE_SHIFT), | |
1401 | KM_SKB_DATA_SOFTIRQ); | |
1402 | crc = crc32(crc, data + (off & ~PAGE_MASK), clen); | |
1403 | kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ); | |
1404 | off += clen; | |
1405 | len -= clen; | |
1406 | } | |
1407 | } | |
1408 | return crc; | |
1409 | } | |
85b4aa49 RL |
1410 | |
1411 | /** | |
1875f27e RL |
1412 | * fcoe_xmit() - Transmit a FCoE frame |
1413 | * @lport: The local port that the frame is to be transmitted for | |
1414 | * @fp: The frame to be transmitted | |
85b4aa49 | 1415 | * |
1875f27e | 1416 | * Return: 0 for success |
34f42a07 | 1417 | */ |
1875f27e | 1418 | int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) |
85b4aa49 | 1419 | { |
4bb6b515 | 1420 | int wlen; |
85b4aa49 RL |
1421 | u32 crc; |
1422 | struct ethhdr *eh; | |
1423 | struct fcoe_crc_eof *cp; | |
1424 | struct sk_buff *skb; | |
1425 | struct fcoe_dev_stats *stats; | |
1426 | struct fc_frame_header *fh; | |
1427 | unsigned int hlen; /* header length implies the version */ | |
1428 | unsigned int tlen; /* trailer length */ | |
1429 | unsigned int elen; /* eth header, may include vlan */ | |
1875f27e | 1430 | struct fcoe_port *port = lport_priv(lport); |
3fe9a0ba | 1431 | struct fcoe_interface *fcoe = port->fcoe; |
85b4aa49 RL |
1432 | u8 sof, eof; |
1433 | struct fcoe_hdr *hp; | |
1434 | ||
1435 | WARN_ON((fr_len(fp) % sizeof(u32)) != 0); | |
1436 | ||
85b4aa49 | 1437 | fh = fc_frame_header_get(fp); |
97c8389d JE |
1438 | skb = fp_skb(fp); |
1439 | wlen = skb->len / FCOE_WORD_TO_BYTE; | |
1440 | ||
1875f27e | 1441 | if (!lport->link_up) { |
3caf02ee | 1442 | kfree_skb(skb); |
97c8389d | 1443 | return 0; |
85b4aa49 RL |
1444 | } |
1445 | ||
97c8389d | 1446 | if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) && |
1875f27e | 1447 | fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb)) |
97c8389d JE |
1448 | return 0; |
1449 | ||
85b4aa49 RL |
1450 | sof = fr_sof(fp); |
1451 | eof = fr_eof(fp); | |
1452 | ||
4e57e1cb | 1453 | elen = sizeof(struct ethhdr); |
85b4aa49 RL |
1454 | hlen = sizeof(struct fcoe_hdr); |
1455 | tlen = sizeof(struct fcoe_crc_eof); | |
1456 | wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; | |
1457 | ||
1458 | /* crc offload */ | |
1875f27e | 1459 | if (likely(lport->crc_offload)) { |
39ca9a06 | 1460 | skb->ip_summed = CHECKSUM_PARTIAL; |
85b4aa49 RL |
1461 | skb->csum_start = skb_headroom(skb); |
1462 | skb->csum_offset = skb->len; | |
1463 | crc = 0; | |
1464 | } else { | |
1465 | skb->ip_summed = CHECKSUM_NONE; | |
1466 | crc = fcoe_fc_crc(fp); | |
1467 | } | |
1468 | ||
014f5c3f | 1469 | /* copy port crc and eof to the skb buff */ |
85b4aa49 RL |
1470 | if (skb_is_nonlinear(skb)) { |
1471 | skb_frag_t *frag; | |
1472 | if (fcoe_get_paged_crc_eof(skb, tlen)) { | |
e9041581 | 1473 | kfree_skb(skb); |
85b4aa49 RL |
1474 | return -ENOMEM; |
1475 | } | |
1476 | frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; | |
1477 | cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ) | |
1478 | + frag->page_offset; | |
1479 | } else { | |
1480 | cp = (struct fcoe_crc_eof *)skb_put(skb, tlen); | |
1481 | } | |
1482 | ||
1483 | memset(cp, 0, sizeof(*cp)); | |
1484 | cp->fcoe_eof = eof; | |
1485 | cp->fcoe_crc32 = cpu_to_le32(~crc); | |
1486 | ||
1487 | if (skb_is_nonlinear(skb)) { | |
1488 | kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ); | |
1489 | cp = NULL; | |
1490 | } | |
1491 | ||
014f5c3f | 1492 | /* adjust skb network/transport offsets to match mac/fcoe/port */ |
85b4aa49 RL |
1493 | skb_push(skb, elen + hlen); |
1494 | skb_reset_mac_header(skb); | |
1495 | skb_reset_network_header(skb); | |
1496 | skb->mac_len = elen; | |
211c738d | 1497 | skb->protocol = htons(ETH_P_FCOE); |
3fe9a0ba | 1498 | skb->dev = fcoe->netdev; |
85b4aa49 RL |
1499 | |
1500 | /* fill up mac and fcoe headers */ | |
1501 | eh = eth_hdr(skb); | |
1502 | eh->h_proto = htons(ETH_P_FCOE); | |
3fe9a0ba | 1503 | if (fcoe->ctlr.map_dest) |
85b4aa49 RL |
1504 | fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id); |
1505 | else | |
1506 | /* insert GW address */ | |
3fe9a0ba | 1507 | memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN); |
85b4aa49 | 1508 | |
3fe9a0ba CL |
1509 | if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN)) |
1510 | memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN); | |
85b4aa49 | 1511 | else |
11b56188 | 1512 | memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); |
85b4aa49 RL |
1513 | |
1514 | hp = (struct fcoe_hdr *)(eh + 1); | |
1515 | memset(hp, 0, sizeof(*hp)); | |
1516 | if (FC_FCOE_VER) | |
1517 | FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); | |
1518 | hp->fcoe_sof = sof; | |
1519 | ||
39ca9a06 | 1520 | /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ |
1875f27e | 1521 | if (lport->seq_offload && fr_max_payload(fp)) { |
39ca9a06 YZ |
1522 | skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; |
1523 | skb_shinfo(skb)->gso_size = fr_max_payload(fp); | |
1524 | } else { | |
1525 | skb_shinfo(skb)->gso_type = 0; | |
1526 | skb_shinfo(skb)->gso_size = 0; | |
1527 | } | |
85b4aa49 | 1528 | /* update tx stats: regardless if LLD fails */ |
1875f27e | 1529 | stats = fc_lport_get_stats(lport); |
582b45bc RL |
1530 | stats->TxFrames++; |
1531 | stats->TxWords += wlen; | |
85b4aa49 RL |
1532 | |
1533 | /* send down to lld */ | |
1875f27e | 1534 | fr_dev(fp) = lport; |
014f5c3f | 1535 | if (port->fcoe_pending_queue.qlen) |
1875f27e | 1536 | fcoe_check_wait_queue(lport, skb); |
4bb6b515 | 1537 | else if (fcoe_start_io(skb)) |
1875f27e | 1538 | fcoe_check_wait_queue(lport, skb); |
85b4aa49 RL |
1539 | |
1540 | return 0; | |
1541 | } | |
85b4aa49 | 1542 | |
e7a51997 | 1543 | /** |
1875f27e RL |
1544 | * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion |
1545 | * @skb: The completed skb (argument required by destructor) | |
e7a51997 JE |
1546 | */ |
1547 | static void fcoe_percpu_flush_done(struct sk_buff *skb) | |
1548 | { | |
1549 | complete(&fcoe_flush_completion); | |
1550 | } | |
1551 | ||
34f42a07 | 1552 | /** |
859b7b64 CL |
1553 | * fcoe_recv_frame() - process a single received frame |
1554 | * @skb: frame to process | |
85b4aa49 | 1555 | */ |
859b7b64 | 1556 | static void fcoe_recv_frame(struct sk_buff *skb) |
85b4aa49 | 1557 | { |
85b4aa49 | 1558 | u32 fr_len; |
1875f27e | 1559 | struct fc_lport *lport; |
85b4aa49 RL |
1560 | struct fcoe_rcv_info *fr; |
1561 | struct fcoe_dev_stats *stats; | |
1562 | struct fc_frame_header *fh; | |
85b4aa49 RL |
1563 | struct fcoe_crc_eof crc_eof; |
1564 | struct fc_frame *fp; | |
1565 | u8 *mac = NULL; | |
014f5c3f | 1566 | struct fcoe_port *port; |
85b4aa49 RL |
1567 | struct fcoe_hdr *hp; |
1568 | ||
859b7b64 CL |
1569 | fr = fcoe_dev_from_skb(skb); |
1570 | lport = fr->fr_dev; | |
1571 | if (unlikely(!lport)) { | |
1572 | if (skb->destructor != fcoe_percpu_flush_done) | |
1573 | FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb"); | |
1574 | kfree_skb(skb); | |
1575 | return; | |
1576 | } | |
1577 | ||
1578 | FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d " | |
1579 | "head:%p data:%p tail:%p end:%p sum:%d dev:%s", | |
1580 | skb->len, skb->data_len, | |
1581 | skb->head, skb->data, skb_tail_pointer(skb), | |
1582 | skb_end_pointer(skb), skb->csum, | |
1583 | skb->dev ? skb->dev->name : "<NULL>"); | |
1584 | ||
1585 | /* | |
1586 | * Save source MAC address before discarding header. | |
1587 | */ | |
1588 | port = lport_priv(lport); | |
1589 | if (skb_is_nonlinear(skb)) | |
1590 | skb_linearize(skb); /* not ideal */ | |
1591 | mac = eth_hdr(skb)->h_source; | |
1592 | ||
1593 | /* | |
1594 | * Frame length checks and setting up the header pointers | |
1595 | * was done in fcoe_rcv already. | |
1596 | */ | |
1597 | hp = (struct fcoe_hdr *) skb_network_header(skb); | |
1598 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1599 | ||
1600 | stats = fc_lport_get_stats(lport); | |
1601 | if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { | |
1602 | if (stats->ErrorFrames < 5) | |
1603 | printk(KERN_WARNING "fcoe: FCoE version " | |
1604 | "mismatch: The frame has " | |
1605 | "version %x, but the " | |
1606 | "initiator supports version " | |
1607 | "%x\n", FC_FCOE_DECAPS_VER(hp), | |
1608 | FC_FCOE_VER); | |
1609 | stats->ErrorFrames++; | |
1610 | kfree_skb(skb); | |
1611 | return; | |
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 */ | |
1626 | if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) { | |
1627 | kfree_skb(skb); | |
1628 | return; | |
1629 | } | |
1630 | fr_eof(fp) = crc_eof.fcoe_eof; | |
1631 | fr_crc(fp) = crc_eof.fcoe_crc32; | |
1632 | if (pskb_trim(skb, fr_len)) { | |
1633 | kfree_skb(skb); | |
1634 | return; | |
1635 | } | |
1636 | ||
1637 | /* | |
1638 | * We only check CRC if no offload is available and if it is | |
1639 | * it's solicited data, in which case, the FCP layer would | |
1640 | * check it during the copy. | |
1641 | */ | |
1642 | if (lport->crc_offload && | |
1643 | skb->ip_summed == CHECKSUM_UNNECESSARY) | |
1644 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; | |
1645 | else | |
1646 | fr_flags(fp) |= FCPHF_CRC_UNCHECKED; | |
1647 | ||
1648 | fh = fc_frame_header_get(fp); | |
1649 | if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && | |
1650 | fh->fh_type == FC_TYPE_FCP) { | |
1651 | fc_exch_recv(lport, fp); | |
1652 | return; | |
1653 | } | |
1654 | if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) { | |
1655 | if (le32_to_cpu(fr_crc(fp)) != | |
1656 | ~crc32(~0, skb->data, fr_len)) { | |
1657 | if (stats->InvalidCRCCount < 5) | |
1658 | printk(KERN_WARNING "fcoe: dropping " | |
1659 | "frame with CRC error\n"); | |
1660 | stats->InvalidCRCCount++; | |
1661 | stats->ErrorFrames++; | |
1662 | fc_frame_free(fp); | |
1663 | return; | |
1664 | } | |
1665 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; | |
1666 | } | |
1667 | fc_exch_recv(lport, fp); | |
1668 | } | |
1669 | ||
1670 | /** | |
1671 | * fcoe_percpu_receive_thread() - The per-CPU packet receive thread | |
1672 | * @arg: The per-CPU context | |
1673 | * | |
1674 | * Return: 0 for success | |
1675 | */ | |
1676 | int fcoe_percpu_receive_thread(void *arg) | |
1677 | { | |
1678 | struct fcoe_percpu_s *p = arg; | |
1679 | struct sk_buff *skb; | |
1680 | ||
4469c195 | 1681 | set_user_nice(current, -20); |
85b4aa49 RL |
1682 | |
1683 | while (!kthread_should_stop()) { | |
1684 | ||
1685 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1686 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) { | |
1687 | set_current_state(TASK_INTERRUPTIBLE); | |
1688 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1689 | schedule(); | |
1690 | set_current_state(TASK_RUNNING); | |
1691 | if (kthread_should_stop()) | |
1692 | return 0; | |
1693 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1694 | } | |
1695 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
859b7b64 | 1696 | fcoe_recv_frame(skb); |
85b4aa49 RL |
1697 | } |
1698 | return 0; | |
1699 | } | |
1700 | ||
85b4aa49 | 1701 | /** |
1875f27e RL |
1702 | * fcoe_check_wait_queue() - Attempt to clear the transmit backlog |
1703 | * @lport: The local port whose backlog is to be cleared | |
85b4aa49 | 1704 | * |
1875f27e RL |
1705 | * This empties the wait_queue, dequeues the head of the wait_queue queue |
1706 | * and calls fcoe_start_io() for each packet. If all skb have been | |
1707 | * transmitted it returns the qlen. If an error occurs it restores | |
1708 | * wait_queue (to try again later) and returns -1. | |
85b4aa49 | 1709 | * |
1875f27e RL |
1710 | * The wait_queue is used when the skb transmit fails. The failed skb |
1711 | * will go in the wait_queue which will be emptied by the timer function or | |
85b4aa49 | 1712 | * by the next skb transmit. |
34f42a07 | 1713 | */ |
1875f27e | 1714 | static void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb) |
85b4aa49 | 1715 | { |
1875f27e | 1716 | struct fcoe_port *port = lport_priv(lport); |
4bb6b515 | 1717 | int rc; |
85b4aa49 | 1718 | |
014f5c3f | 1719 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
4bb6b515 VD |
1720 | |
1721 | if (skb) | |
014f5c3f | 1722 | __skb_queue_tail(&port->fcoe_pending_queue, skb); |
4bb6b515 | 1723 | |
014f5c3f | 1724 | if (port->fcoe_pending_queue_active) |
c826a314 | 1725 | goto out; |
014f5c3f | 1726 | port->fcoe_pending_queue_active = 1; |
55c8bafb | 1727 | |
014f5c3f | 1728 | while (port->fcoe_pending_queue.qlen) { |
55c8bafb | 1729 | /* keep qlen > 0 until fcoe_start_io succeeds */ |
014f5c3f CL |
1730 | port->fcoe_pending_queue.qlen++; |
1731 | skb = __skb_dequeue(&port->fcoe_pending_queue); | |
55c8bafb | 1732 | |
014f5c3f | 1733 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
55c8bafb | 1734 | rc = fcoe_start_io(skb); |
014f5c3f | 1735 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
55c8bafb CL |
1736 | |
1737 | if (rc) { | |
014f5c3f | 1738 | __skb_queue_head(&port->fcoe_pending_queue, skb); |
55c8bafb | 1739 | /* undo temporary increment above */ |
014f5c3f | 1740 | port->fcoe_pending_queue.qlen--; |
55c8bafb | 1741 | break; |
85b4aa49 | 1742 | } |
55c8bafb | 1743 | /* undo temporary increment above */ |
014f5c3f | 1744 | port->fcoe_pending_queue.qlen--; |
85b4aa49 | 1745 | } |
55c8bafb | 1746 | |
014f5c3f | 1747 | if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH) |
1875f27e | 1748 | lport->qfull = 0; |
014f5c3f CL |
1749 | if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer)) |
1750 | mod_timer(&port->timer, jiffies + 2); | |
1751 | port->fcoe_pending_queue_active = 0; | |
c826a314 | 1752 | out: |
014f5c3f | 1753 | if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH) |
1875f27e | 1754 | lport->qfull = 1; |
014f5c3f | 1755 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
4bb6b515 | 1756 | return; |
85b4aa49 RL |
1757 | } |
1758 | ||
85b4aa49 | 1759 | /** |
1875f27e | 1760 | * fcoe_dev_setup() - Setup the link change notification interface |
34f42a07 | 1761 | */ |
b0d428ad | 1762 | static void fcoe_dev_setup(void) |
85b4aa49 | 1763 | { |
85b4aa49 RL |
1764 | register_netdevice_notifier(&fcoe_notifier); |
1765 | } | |
1766 | ||
1767 | /** | |
1875f27e | 1768 | * fcoe_dev_cleanup() - Cleanup the link change notification interface |
34f42a07 | 1769 | */ |
85b4aa49 RL |
1770 | static void fcoe_dev_cleanup(void) |
1771 | { | |
1772 | unregister_netdevice_notifier(&fcoe_notifier); | |
1773 | } | |
1774 | ||
1775 | /** | |
1875f27e RL |
1776 | * fcoe_device_notification() - Handler for net device events |
1777 | * @notifier: The context of the notification | |
1778 | * @event: The type of event | |
1779 | * @ptr: The net device that the event was on | |
85b4aa49 | 1780 | * |
1875f27e | 1781 | * This function is called by the Ethernet driver in case of link change event. |
85b4aa49 RL |
1782 | * |
1783 | * Returns: 0 for success | |
34f42a07 | 1784 | */ |
85b4aa49 RL |
1785 | static int fcoe_device_notification(struct notifier_block *notifier, |
1786 | ulong event, void *ptr) | |
1787 | { | |
1875f27e | 1788 | struct fc_lport *lport = NULL; |
1d1b88dc | 1789 | struct net_device *netdev = ptr; |
014f5c3f | 1790 | struct fcoe_interface *fcoe; |
2e70e241 | 1791 | struct fcoe_port *port; |
85b4aa49 | 1792 | struct fcoe_dev_stats *stats; |
97c8389d | 1793 | u32 link_possible = 1; |
85b4aa49 RL |
1794 | u32 mfs; |
1795 | int rc = NOTIFY_OK; | |
1796 | ||
014f5c3f | 1797 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
25024989 | 1798 | if (fcoe->netdev == netdev) { |
1875f27e | 1799 | lport = fcoe->ctlr.lp; |
85b4aa49 RL |
1800 | break; |
1801 | } | |
1802 | } | |
1875f27e | 1803 | if (!lport) { |
85b4aa49 RL |
1804 | rc = NOTIFY_DONE; |
1805 | goto out; | |
1806 | } | |
1807 | ||
85b4aa49 RL |
1808 | switch (event) { |
1809 | case NETDEV_DOWN: | |
1810 | case NETDEV_GOING_DOWN: | |
97c8389d | 1811 | link_possible = 0; |
85b4aa49 RL |
1812 | break; |
1813 | case NETDEV_UP: | |
1814 | case NETDEV_CHANGE: | |
85b4aa49 RL |
1815 | break; |
1816 | case NETDEV_CHANGEMTU: | |
7221d7e5 YZ |
1817 | if (netdev->features & NETIF_F_FCOE_MTU) |
1818 | break; | |
1d1b88dc VD |
1819 | mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + |
1820 | sizeof(struct fcoe_crc_eof)); | |
85b4aa49 | 1821 | if (mfs >= FC_MIN_MAX_FRAME) |
1875f27e | 1822 | fc_set_mfs(lport, mfs); |
85b4aa49 RL |
1823 | break; |
1824 | case NETDEV_REGISTER: | |
1825 | break; | |
2e70e241 CL |
1826 | case NETDEV_UNREGISTER: |
1827 | list_del(&fcoe->list); | |
1828 | port = lport_priv(fcoe->ctlr.lp); | |
1829 | fcoe_interface_cleanup(fcoe); | |
1830 | schedule_work(&port->destroy_work); | |
1831 | goto out; | |
1832 | break; | |
85b4aa49 | 1833 | default: |
1d1b88dc | 1834 | FCOE_NETDEV_DBG(netdev, "Unknown event %ld " |
d5488eb9 | 1835 | "from netdev netlink\n", event); |
85b4aa49 | 1836 | } |
1875f27e | 1837 | if (link_possible && !fcoe_link_ok(lport)) |
3fe9a0ba CL |
1838 | fcoe_ctlr_link_up(&fcoe->ctlr); |
1839 | else if (fcoe_ctlr_link_down(&fcoe->ctlr)) { | |
1875f27e | 1840 | stats = fc_lport_get_stats(lport); |
97c8389d | 1841 | stats->LinkFailureCount++; |
1875f27e | 1842 | fcoe_clean_pending_queue(lport); |
85b4aa49 RL |
1843 | } |
1844 | out: | |
1845 | return rc; | |
1846 | } | |
1847 | ||
1848 | /** | |
1875f27e RL |
1849 | * fcoe_if_to_netdev() - Parse a name buffer to get a net device |
1850 | * @buffer: The name of the net device | |
85b4aa49 | 1851 | * |
1875f27e | 1852 | * Returns: NULL or a ptr to net_device |
34f42a07 | 1853 | */ |
85b4aa49 RL |
1854 | static struct net_device *fcoe_if_to_netdev(const char *buffer) |
1855 | { | |
1856 | char *cp; | |
1857 | char ifname[IFNAMSIZ + 2]; | |
1858 | ||
1859 | if (buffer) { | |
1860 | strlcpy(ifname, buffer, IFNAMSIZ); | |
1861 | cp = ifname + strlen(ifname); | |
1862 | while (--cp >= ifname && *cp == '\n') | |
1863 | *cp = '\0'; | |
1864 | return dev_get_by_name(&init_net, ifname); | |
1865 | } | |
1866 | return NULL; | |
1867 | } | |
1868 | ||
55a66d3c VD |
1869 | /** |
1870 | * fcoe_disable() - Disables a FCoE interface | |
1871 | * @buffer: The name of the Ethernet interface to be disabled | |
1872 | * @kp: The associated kernel parameter | |
1873 | * | |
1874 | * Called from sysfs. | |
1875 | * | |
1876 | * Returns: 0 for success | |
1877 | */ | |
1878 | static int fcoe_disable(const char *buffer, struct kernel_param *kp) | |
1879 | { | |
1880 | struct fcoe_interface *fcoe; | |
1881 | struct net_device *netdev; | |
1882 | int rc = 0; | |
1883 | ||
1884 | mutex_lock(&fcoe_config_mutex); | |
1885 | #ifdef CONFIG_FCOE_MODULE | |
1886 | /* | |
1887 | * Make sure the module has been initialized, and is not about to be | |
1888 | * removed. Module paramter sysfs files are writable before the | |
1889 | * module_init function is called and after module_exit. | |
1890 | */ | |
1891 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
1892 | rc = -ENODEV; | |
1893 | goto out_nodev; | |
1894 | } | |
1895 | #endif | |
1896 | ||
1897 | netdev = fcoe_if_to_netdev(buffer); | |
1898 | if (!netdev) { | |
1899 | rc = -ENODEV; | |
1900 | goto out_nodev; | |
1901 | } | |
1902 | ||
1903 | rtnl_lock(); | |
1904 | fcoe = fcoe_hostlist_lookup_port(netdev); | |
1905 | rtnl_unlock(); | |
1906 | ||
1907 | if (fcoe) | |
1908 | fc_fabric_logoff(fcoe->ctlr.lp); | |
1909 | else | |
1910 | rc = -ENODEV; | |
1911 | ||
1912 | dev_put(netdev); | |
1913 | out_nodev: | |
1914 | mutex_unlock(&fcoe_config_mutex); | |
1915 | return rc; | |
1916 | } | |
1917 | ||
1918 | /** | |
1919 | * fcoe_enable() - Enables a FCoE interface | |
1920 | * @buffer: The name of the Ethernet interface to be enabled | |
1921 | * @kp: The associated kernel parameter | |
1922 | * | |
1923 | * Called from sysfs. | |
1924 | * | |
1925 | * Returns: 0 for success | |
1926 | */ | |
1927 | static int fcoe_enable(const char *buffer, struct kernel_param *kp) | |
1928 | { | |
1929 | struct fcoe_interface *fcoe; | |
1930 | struct net_device *netdev; | |
1931 | int rc = 0; | |
1932 | ||
1933 | mutex_lock(&fcoe_config_mutex); | |
1934 | #ifdef CONFIG_FCOE_MODULE | |
1935 | /* | |
1936 | * Make sure the module has been initialized, and is not about to be | |
1937 | * removed. Module paramter sysfs files are writable before the | |
1938 | * module_init function is called and after module_exit. | |
1939 | */ | |
1940 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
1941 | rc = -ENODEV; | |
1942 | goto out_nodev; | |
1943 | } | |
1944 | #endif | |
1945 | ||
1946 | netdev = fcoe_if_to_netdev(buffer); | |
1947 | if (!netdev) { | |
1948 | rc = -ENODEV; | |
1949 | goto out_nodev; | |
1950 | } | |
1951 | ||
1952 | rtnl_lock(); | |
1953 | fcoe = fcoe_hostlist_lookup_port(netdev); | |
1954 | rtnl_unlock(); | |
1955 | ||
1956 | if (fcoe) | |
1957 | rc = fc_fabric_login(fcoe->ctlr.lp); | |
1958 | else | |
1959 | rc = -ENODEV; | |
1960 | ||
1961 | dev_put(netdev); | |
1962 | out_nodev: | |
1963 | mutex_unlock(&fcoe_config_mutex); | |
1964 | return rc; | |
1965 | } | |
1966 | ||
85b4aa49 | 1967 | /** |
1875f27e RL |
1968 | * fcoe_destroy() - Destroy a FCoE interface |
1969 | * @buffer: The name of the Ethernet interface to be destroyed | |
1970 | * @kp: The associated kernel parameter | |
1971 | * | |
1972 | * Called from sysfs. | |
85b4aa49 RL |
1973 | * |
1974 | * Returns: 0 for success | |
34f42a07 | 1975 | */ |
85b4aa49 RL |
1976 | static int fcoe_destroy(const char *buffer, struct kernel_param *kp) |
1977 | { | |
030f4e00 | 1978 | struct fcoe_interface *fcoe; |
2e70e241 | 1979 | struct net_device *netdev; |
8eca355f | 1980 | int rc = 0; |
85b4aa49 | 1981 | |
dfc1d0fe CL |
1982 | mutex_lock(&fcoe_config_mutex); |
1983 | #ifdef CONFIG_FCOE_MODULE | |
1984 | /* | |
1985 | * Make sure the module has been initialized, and is not about to be | |
1986 | * removed. Module paramter sysfs files are writable before the | |
1987 | * module_init function is called and after module_exit. | |
1988 | */ | |
1989 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
1990 | rc = -ENODEV; | |
1991 | goto out_nodev; | |
1992 | } | |
1993 | #endif | |
1994 | ||
85b4aa49 RL |
1995 | netdev = fcoe_if_to_netdev(buffer); |
1996 | if (!netdev) { | |
1997 | rc = -ENODEV; | |
1998 | goto out_nodev; | |
1999 | } | |
2e70e241 | 2000 | |
090eb6c4 | 2001 | rtnl_lock(); |
2e70e241 CL |
2002 | fcoe = fcoe_hostlist_lookup_port(netdev); |
2003 | if (!fcoe) { | |
090eb6c4 | 2004 | rtnl_unlock(); |
85b4aa49 RL |
2005 | rc = -ENODEV; |
2006 | goto out_putdev; | |
2007 | } | |
2e70e241 | 2008 | list_del(&fcoe->list); |
2e70e241 CL |
2009 | fcoe_interface_cleanup(fcoe); |
2010 | rtnl_unlock(); | |
2011 | fcoe_if_destroy(fcoe->ctlr.lp); | |
6409ea65 RL |
2012 | module_put(THIS_MODULE); |
2013 | ||
85b4aa49 RL |
2014 | out_putdev: |
2015 | dev_put(netdev); | |
2016 | out_nodev: | |
dfc1d0fe | 2017 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 RL |
2018 | return rc; |
2019 | } | |
2020 | ||
1875f27e RL |
2021 | /** |
2022 | * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context | |
2023 | * @work: Handle to the FCoE port to be destroyed | |
2024 | */ | |
2e70e241 CL |
2025 | static void fcoe_destroy_work(struct work_struct *work) |
2026 | { | |
2027 | struct fcoe_port *port; | |
2028 | ||
2029 | port = container_of(work, struct fcoe_port, destroy_work); | |
2030 | mutex_lock(&fcoe_config_mutex); | |
2031 | fcoe_if_destroy(port->lport); | |
2032 | mutex_unlock(&fcoe_config_mutex); | |
2033 | } | |
2034 | ||
85b4aa49 | 2035 | /** |
1875f27e RL |
2036 | * fcoe_create() - Create a fcoe interface |
2037 | * @buffer: The name of the Ethernet interface to create on | |
2038 | * @kp: The associated kernel param | |
2039 | * | |
2040 | * Called from sysfs. | |
85b4aa49 RL |
2041 | * |
2042 | * Returns: 0 for success | |
34f42a07 | 2043 | */ |
85b4aa49 RL |
2044 | static int fcoe_create(const char *buffer, struct kernel_param *kp) |
2045 | { | |
2046 | int rc; | |
030f4e00 | 2047 | struct fcoe_interface *fcoe; |
af7f85d9 | 2048 | struct fc_lport *lport; |
85b4aa49 RL |
2049 | struct net_device *netdev; |
2050 | ||
dfc1d0fe CL |
2051 | mutex_lock(&fcoe_config_mutex); |
2052 | #ifdef CONFIG_FCOE_MODULE | |
2053 | /* | |
2054 | * Make sure the module has been initialized, and is not about to be | |
2055 | * removed. Module paramter sysfs files are writable before the | |
2056 | * module_init function is called and after module_exit. | |
2057 | */ | |
2058 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
2059 | rc = -ENODEV; | |
2060 | goto out_nodev; | |
2061 | } | |
2062 | #endif | |
2063 | ||
6409ea65 RL |
2064 | if (!try_module_get(THIS_MODULE)) { |
2065 | rc = -EINVAL; | |
2066 | goto out_nomod; | |
2067 | } | |
2068 | ||
2e70e241 | 2069 | rtnl_lock(); |
85b4aa49 RL |
2070 | netdev = fcoe_if_to_netdev(buffer); |
2071 | if (!netdev) { | |
2072 | rc = -ENODEV; | |
2073 | goto out_nodev; | |
2074 | } | |
2e70e241 | 2075 | |
85b4aa49 RL |
2076 | /* look for existing lport */ |
2077 | if (fcoe_hostlist_lookup(netdev)) { | |
2078 | rc = -EEXIST; | |
2079 | goto out_putdev; | |
2080 | } | |
85b4aa49 | 2081 | |
030f4e00 CL |
2082 | fcoe = fcoe_interface_create(netdev); |
2083 | if (!fcoe) { | |
2084 | rc = -ENOMEM; | |
2085 | goto out_putdev; | |
2086 | } | |
2087 | ||
9a05753b | 2088 | lport = fcoe_if_create(fcoe, &netdev->dev, 0); |
af7f85d9 | 2089 | if (IS_ERR(lport)) { |
d5488eb9 | 2090 | printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", |
85b4aa49 | 2091 | netdev->name); |
85b4aa49 | 2092 | rc = -EIO; |
2e70e241 | 2093 | fcoe_interface_cleanup(fcoe); |
030f4e00 | 2094 | goto out_free; |
85b4aa49 | 2095 | } |
030f4e00 | 2096 | |
54b649f8 CL |
2097 | /* Make this the "master" N_Port */ |
2098 | fcoe->ctlr.lp = lport; | |
2099 | ||
c863df33 CL |
2100 | /* add to lports list */ |
2101 | fcoe_hostlist_add(lport); | |
2102 | ||
54b649f8 CL |
2103 | /* start FIP Discovery and FLOGI */ |
2104 | lport->boot_time = jiffies; | |
2105 | fc_fabric_login(lport); | |
2106 | if (!fcoe_link_ok(lport)) | |
2107 | fcoe_ctlr_link_up(&fcoe->ctlr); | |
030f4e00 | 2108 | |
54b649f8 CL |
2109 | /* |
2110 | * Release from init in fcoe_interface_create(), on success lport | |
2111 | * should be holding a reference taken in fcoe_if_create(). | |
2112 | */ | |
030f4e00 | 2113 | fcoe_interface_put(fcoe); |
6409ea65 RL |
2114 | dev_put(netdev); |
2115 | rtnl_unlock(); | |
2116 | mutex_unlock(&fcoe_config_mutex); | |
2117 | ||
2118 | return 0; | |
2119 | out_free: | |
2120 | fcoe_interface_put(fcoe); | |
85b4aa49 RL |
2121 | out_putdev: |
2122 | dev_put(netdev); | |
2123 | out_nodev: | |
2e70e241 | 2124 | rtnl_unlock(); |
6409ea65 RL |
2125 | module_put(THIS_MODULE); |
2126 | out_nomod: | |
dfc1d0fe | 2127 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 RL |
2128 | return rc; |
2129 | } | |
2130 | ||
34f42a07 | 2131 | /** |
1875f27e RL |
2132 | * fcoe_link_ok() - Check if the link is OK for a local port |
2133 | * @lport: The local port to check link on | |
85b4aa49 RL |
2134 | * |
2135 | * Any permanently-disqualifying conditions have been previously checked. | |
2136 | * This also updates the speed setting, which may change with link for 100/1000. | |
2137 | * | |
2138 | * This function should probably be checking for PAUSE support at some point | |
2139 | * in the future. Currently Per-priority-pause is not determinable using | |
2140 | * ethtool, so we shouldn't be restrictive until that problem is resolved. | |
2141 | * | |
2142 | * Returns: 0 if link is OK for use by FCoE. | |
2143 | * | |
2144 | */ | |
1875f27e | 2145 | int fcoe_link_ok(struct fc_lport *lport) |
85b4aa49 | 2146 | { |
1875f27e RL |
2147 | struct fcoe_port *port = lport_priv(lport); |
2148 | struct net_device *netdev = port->fcoe->netdev; | |
85b4aa49 | 2149 | struct ethtool_cmd ecmd = { ETHTOOL_GSET }; |
85b4aa49 | 2150 | |
1875f27e RL |
2151 | if ((netdev->flags & IFF_UP) && netif_carrier_ok(netdev) && |
2152 | (!dev_ethtool_get_settings(netdev, &ecmd))) { | |
2153 | lport->link_supported_speeds &= | |
2f718d64 YZ |
2154 | ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT); |
2155 | if (ecmd.supported & (SUPPORTED_1000baseT_Half | | |
2156 | SUPPORTED_1000baseT_Full)) | |
1875f27e | 2157 | lport->link_supported_speeds |= FC_PORTSPEED_1GBIT; |
2f718d64 | 2158 | if (ecmd.supported & SUPPORTED_10000baseT_Full) |
1875f27e | 2159 | lport->link_supported_speeds |= |
2f718d64 YZ |
2160 | FC_PORTSPEED_10GBIT; |
2161 | if (ecmd.speed == SPEED_1000) | |
1875f27e | 2162 | lport->link_speed = FC_PORTSPEED_1GBIT; |
2f718d64 | 2163 | if (ecmd.speed == SPEED_10000) |
1875f27e | 2164 | lport->link_speed = FC_PORTSPEED_10GBIT; |
85b4aa49 | 2165 | |
2f718d64 YZ |
2166 | return 0; |
2167 | } | |
2168 | return -1; | |
85b4aa49 | 2169 | } |
85b4aa49 | 2170 | |
34f42a07 | 2171 | /** |
1875f27e RL |
2172 | * fcoe_percpu_clean() - Clear all pending skbs for an local port |
2173 | * @lport: The local port whose skbs are to be cleared | |
e7a51997 JE |
2174 | * |
2175 | * Must be called with fcoe_create_mutex held to single-thread completion. | |
2176 | * | |
2177 | * This flushes the pending skbs by adding a new skb to each queue and | |
2178 | * waiting until they are all freed. This assures us that not only are | |
2179 | * there no packets that will be handled by the lport, but also that any | |
2180 | * threads already handling packet have returned. | |
85b4aa49 | 2181 | */ |
1875f27e | 2182 | void fcoe_percpu_clean(struct fc_lport *lport) |
85b4aa49 | 2183 | { |
85b4aa49 RL |
2184 | struct fcoe_percpu_s *pp; |
2185 | struct fcoe_rcv_info *fr; | |
2186 | struct sk_buff_head *list; | |
2187 | struct sk_buff *skb, *next; | |
2188 | struct sk_buff *head; | |
5e5e92df | 2189 | unsigned int cpu; |
85b4aa49 | 2190 | |
5e5e92df RL |
2191 | for_each_possible_cpu(cpu) { |
2192 | pp = &per_cpu(fcoe_percpu, cpu); | |
2193 | spin_lock_bh(&pp->fcoe_rx_list.lock); | |
2194 | list = &pp->fcoe_rx_list; | |
2195 | head = list->next; | |
2196 | for (skb = head; skb != (struct sk_buff *)list; | |
2197 | skb = next) { | |
2198 | next = skb->next; | |
2199 | fr = fcoe_dev_from_skb(skb); | |
1875f27e | 2200 | if (fr->fr_dev == lport) { |
5e5e92df RL |
2201 | __skb_unlink(skb, list); |
2202 | kfree_skb(skb); | |
85b4aa49 | 2203 | } |
85b4aa49 | 2204 | } |
e7a51997 JE |
2205 | |
2206 | if (!pp->thread || !cpu_online(cpu)) { | |
2207 | spin_unlock_bh(&pp->fcoe_rx_list.lock); | |
2208 | continue; | |
2209 | } | |
2210 | ||
2211 | skb = dev_alloc_skb(0); | |
2212 | if (!skb) { | |
2213 | spin_unlock_bh(&pp->fcoe_rx_list.lock); | |
2214 | continue; | |
2215 | } | |
2216 | skb->destructor = fcoe_percpu_flush_done; | |
2217 | ||
2218 | __skb_queue_tail(&pp->fcoe_rx_list, skb); | |
2219 | if (pp->fcoe_rx_list.qlen == 1) | |
2220 | wake_up_process(pp->thread); | |
5e5e92df | 2221 | spin_unlock_bh(&pp->fcoe_rx_list.lock); |
e7a51997 JE |
2222 | |
2223 | wait_for_completion(&fcoe_flush_completion); | |
85b4aa49 RL |
2224 | } |
2225 | } | |
85b4aa49 RL |
2226 | |
2227 | /** | |
34f42a07 | 2228 | * fcoe_clean_pending_queue() - Dequeue a skb and free it |
1875f27e | 2229 | * @lport: The local port to dequeue a skb on |
34f42a07 | 2230 | */ |
1875f27e | 2231 | void fcoe_clean_pending_queue(struct fc_lport *lport) |
85b4aa49 | 2232 | { |
1875f27e | 2233 | struct fcoe_port *port = lport_priv(lport); |
85b4aa49 RL |
2234 | struct sk_buff *skb; |
2235 | ||
014f5c3f CL |
2236 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
2237 | while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) { | |
2238 | spin_unlock_bh(&port->fcoe_pending_queue.lock); | |
85b4aa49 | 2239 | kfree_skb(skb); |
014f5c3f | 2240 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
85b4aa49 | 2241 | } |
014f5c3f | 2242 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
85b4aa49 | 2243 | } |
85b4aa49 | 2244 | |
34f42a07 | 2245 | /** |
1875f27e RL |
2246 | * fcoe_reset() - Reset a local port |
2247 | * @shost: The SCSI host associated with the local port to be reset | |
85b4aa49 | 2248 | * |
1875f27e | 2249 | * Returns: Always 0 (return value required by FC transport template) |
85b4aa49 RL |
2250 | */ |
2251 | int fcoe_reset(struct Scsi_Host *shost) | |
2252 | { | |
2253 | struct fc_lport *lport = shost_priv(shost); | |
2254 | fc_lport_reset(lport); | |
2255 | return 0; | |
2256 | } | |
85b4aa49 | 2257 | |
34f42a07 | 2258 | /** |
1875f27e RL |
2259 | * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device |
2260 | * @netdev: The net device used as a key | |
85b4aa49 | 2261 | * |
1875f27e RL |
2262 | * Locking: Must be called with the RNL mutex held. |
2263 | * | |
2264 | * Returns: NULL or the FCoE interface | |
85b4aa49 | 2265 | */ |
014f5c3f | 2266 | static struct fcoe_interface * |
1875f27e | 2267 | fcoe_hostlist_lookup_port(const struct net_device *netdev) |
85b4aa49 | 2268 | { |
014f5c3f | 2269 | struct fcoe_interface *fcoe; |
85b4aa49 | 2270 | |
014f5c3f | 2271 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
1875f27e | 2272 | if (fcoe->netdev == netdev) |
014f5c3f | 2273 | return fcoe; |
85b4aa49 | 2274 | } |
85b4aa49 RL |
2275 | return NULL; |
2276 | } | |
2277 | ||
34f42a07 | 2278 | /** |
1875f27e RL |
2279 | * fcoe_hostlist_lookup() - Find the local port associated with a |
2280 | * given net device | |
2281 | * @netdev: The netdevice used as a key | |
85b4aa49 | 2282 | * |
1875f27e RL |
2283 | * Locking: Must be called with the RTNL mutex held |
2284 | * | |
2285 | * Returns: NULL or the local port | |
85b4aa49 | 2286 | */ |
090eb6c4 | 2287 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) |
85b4aa49 | 2288 | { |
014f5c3f | 2289 | struct fcoe_interface *fcoe; |
85b4aa49 | 2290 | |
014f5c3f | 2291 | fcoe = fcoe_hostlist_lookup_port(netdev); |
3fe9a0ba | 2292 | return (fcoe) ? fcoe->ctlr.lp : NULL; |
85b4aa49 | 2293 | } |
85b4aa49 | 2294 | |
34f42a07 | 2295 | /** |
1875f27e RL |
2296 | * fcoe_hostlist_add() - Add the FCoE interface identified by a local |
2297 | * port to the hostlist | |
2298 | * @lport: The local port that identifies the FCoE interface to be added | |
85b4aa49 | 2299 | * |
090eb6c4 | 2300 | * Locking: must be called with the RTNL mutex held |
1875f27e RL |
2301 | * |
2302 | * Returns: 0 for success | |
85b4aa49 | 2303 | */ |
090eb6c4 | 2304 | static int fcoe_hostlist_add(const struct fc_lport *lport) |
85b4aa49 | 2305 | { |
014f5c3f CL |
2306 | struct fcoe_interface *fcoe; |
2307 | struct fcoe_port *port; | |
2308 | ||
2309 | fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); | |
2310 | if (!fcoe) { | |
2311 | port = lport_priv(lport); | |
2312 | fcoe = port->fcoe; | |
2313 | list_add_tail(&fcoe->list, &fcoe_hostlist); | |
85b4aa49 RL |
2314 | } |
2315 | return 0; | |
2316 | } | |
85b4aa49 | 2317 | |
85b4aa49 | 2318 | /** |
1875f27e | 2319 | * fcoe_init() - Initialize fcoe.ko |
85b4aa49 | 2320 | * |
1875f27e | 2321 | * Returns: 0 on success, or a negative value on failure |
34f42a07 | 2322 | */ |
85b4aa49 RL |
2323 | static int __init fcoe_init(void) |
2324 | { | |
1875f27e | 2325 | struct fcoe_percpu_s *p; |
38eccabd | 2326 | unsigned int cpu; |
8976f424 | 2327 | int rc = 0; |
85b4aa49 | 2328 | |
dfc1d0fe CL |
2329 | mutex_lock(&fcoe_config_mutex); |
2330 | ||
38eccabd | 2331 | for_each_possible_cpu(cpu) { |
5e5e92df | 2332 | p = &per_cpu(fcoe_percpu, cpu); |
38eccabd RL |
2333 | skb_queue_head_init(&p->fcoe_rx_list); |
2334 | } | |
2335 | ||
8976f424 RL |
2336 | for_each_online_cpu(cpu) |
2337 | fcoe_percpu_thread_create(cpu); | |
85b4aa49 | 2338 | |
8976f424 RL |
2339 | /* Initialize per CPU interrupt thread */ |
2340 | rc = register_hotcpu_notifier(&fcoe_cpu_notifier); | |
2341 | if (rc) | |
2342 | goto out_free; | |
85b4aa49 | 2343 | |
8976f424 | 2344 | /* Setup link change notification */ |
85b4aa49 RL |
2345 | fcoe_dev_setup(); |
2346 | ||
5892c32f CL |
2347 | rc = fcoe_if_init(); |
2348 | if (rc) | |
2349 | goto out_free; | |
85b4aa49 | 2350 | |
dfc1d0fe | 2351 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 | 2352 | return 0; |
8976f424 RL |
2353 | |
2354 | out_free: | |
2355 | for_each_online_cpu(cpu) { | |
2356 | fcoe_percpu_thread_destroy(cpu); | |
2357 | } | |
dfc1d0fe | 2358 | mutex_unlock(&fcoe_config_mutex); |
8976f424 | 2359 | return rc; |
85b4aa49 RL |
2360 | } |
2361 | module_init(fcoe_init); | |
2362 | ||
2363 | /** | |
1875f27e | 2364 | * fcoe_exit() - Clean up fcoe.ko |
85b4aa49 | 2365 | * |
1875f27e | 2366 | * Returns: 0 on success or a negative value on failure |
34f42a07 | 2367 | */ |
85b4aa49 RL |
2368 | static void __exit fcoe_exit(void) |
2369 | { | |
014f5c3f | 2370 | struct fcoe_interface *fcoe, *tmp; |
2e70e241 | 2371 | struct fcoe_port *port; |
1875f27e | 2372 | unsigned int cpu; |
85b4aa49 | 2373 | |
dfc1d0fe CL |
2374 | mutex_lock(&fcoe_config_mutex); |
2375 | ||
85b4aa49 RL |
2376 | fcoe_dev_cleanup(); |
2377 | ||
5919a595 | 2378 | /* releases the associated fcoe hosts */ |
090eb6c4 CL |
2379 | rtnl_lock(); |
2380 | list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { | |
c863df33 | 2381 | list_del(&fcoe->list); |
2e70e241 | 2382 | port = lport_priv(fcoe->ctlr.lp); |
2e70e241 | 2383 | fcoe_interface_cleanup(fcoe); |
2e70e241 | 2384 | schedule_work(&port->destroy_work); |
c863df33 | 2385 | } |
090eb6c4 | 2386 | rtnl_unlock(); |
85b4aa49 | 2387 | |
8976f424 RL |
2388 | unregister_hotcpu_notifier(&fcoe_cpu_notifier); |
2389 | ||
014f5c3f | 2390 | for_each_online_cpu(cpu) |
8976f424 | 2391 | fcoe_percpu_thread_destroy(cpu); |
85b4aa49 | 2392 | |
dfc1d0fe | 2393 | mutex_unlock(&fcoe_config_mutex); |
2e70e241 CL |
2394 | |
2395 | /* flush any asyncronous interface destroys, | |
2396 | * this should happen after the netdev notifier is unregistered */ | |
2397 | flush_scheduled_work(); | |
9a05753b CL |
2398 | /* That will flush out all the N_Ports on the hostlist, but now we |
2399 | * may have NPIV VN_Ports scheduled for destruction */ | |
2400 | flush_scheduled_work(); | |
2e70e241 CL |
2401 | |
2402 | /* detach from scsi transport | |
2403 | * must happen after all destroys are done, therefor after the flush */ | |
2404 | fcoe_if_exit(); | |
85b4aa49 RL |
2405 | } |
2406 | module_exit(fcoe_exit); | |
11b56188 CL |
2407 | |
2408 | /** | |
2409 | * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler | |
2410 | * @seq: active sequence in the FLOGI or FDISC exchange | |
2411 | * @fp: response frame, or error encoded in a pointer (timeout) | |
2412 | * @arg: pointer the the fcoe_ctlr structure | |
2413 | * | |
2414 | * This handles MAC address managment for FCoE, then passes control on to | |
2415 | * the libfc FLOGI response handler. | |
2416 | */ | |
2417 | static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) | |
2418 | { | |
2419 | struct fcoe_ctlr *fip = arg; | |
2420 | struct fc_exch *exch = fc_seq_exch(seq); | |
2421 | struct fc_lport *lport = exch->lp; | |
2422 | u8 *mac; | |
2423 | ||
2424 | if (IS_ERR(fp)) | |
2425 | goto done; | |
2426 | ||
2427 | mac = fr_cb(fp)->granted_mac; | |
2428 | if (is_zero_ether_addr(mac)) { | |
2429 | /* pre-FIP */ | |
386309ce | 2430 | if (fcoe_ctlr_recv_flogi(fip, lport, fp)) { |
11b56188 CL |
2431 | fc_frame_free(fp); |
2432 | return; | |
2433 | } | |
11b56188 | 2434 | } |
386309ce | 2435 | fcoe_update_src_mac(lport, mac); |
11b56188 CL |
2436 | done: |
2437 | fc_lport_flogi_resp(seq, fp, lport); | |
2438 | } | |
2439 | ||
2440 | /** | |
2441 | * fcoe_logo_resp() - FCoE specific LOGO response handler | |
2442 | * @seq: active sequence in the LOGO exchange | |
2443 | * @fp: response frame, or error encoded in a pointer (timeout) | |
2444 | * @arg: pointer the the fcoe_ctlr structure | |
2445 | * | |
2446 | * This handles MAC address managment for FCoE, then passes control on to | |
2447 | * the libfc LOGO response handler. | |
2448 | */ | |
2449 | static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) | |
2450 | { | |
386309ce | 2451 | struct fc_lport *lport = arg; |
11b56188 CL |
2452 | static u8 zero_mac[ETH_ALEN] = { 0 }; |
2453 | ||
2454 | if (!IS_ERR(fp)) | |
386309ce | 2455 | fcoe_update_src_mac(lport, zero_mac); |
11b56188 CL |
2456 | fc_lport_logo_resp(seq, fp, lport); |
2457 | } | |
2458 | ||
2459 | /** | |
2460 | * fcoe_elsct_send - FCoE specific ELS handler | |
2461 | * | |
2462 | * This does special case handling of FIP encapsualted ELS exchanges for FCoE, | |
2463 | * using FCoE specific response handlers and passing the FIP controller as | |
2464 | * the argument (the lport is still available from the exchange). | |
2465 | * | |
2466 | * Most of the work here is just handed off to the libfc routine. | |
2467 | */ | |
1875f27e RL |
2468 | static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, |
2469 | struct fc_frame *fp, unsigned int op, | |
2470 | void (*resp)(struct fc_seq *, | |
2471 | struct fc_frame *, | |
2472 | void *), | |
2473 | void *arg, u32 timeout) | |
11b56188 CL |
2474 | { |
2475 | struct fcoe_port *port = lport_priv(lport); | |
2476 | struct fcoe_interface *fcoe = port->fcoe; | |
2477 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
2478 | struct fc_frame_header *fh = fc_frame_header_get(fp); | |
2479 | ||
2480 | switch (op) { | |
2481 | case ELS_FLOGI: | |
2482 | case ELS_FDISC: | |
2483 | return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, | |
2484 | fip, timeout); | |
2485 | case ELS_LOGO: | |
2486 | /* only hook onto fabric logouts, not port logouts */ | |
2487 | if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) | |
2488 | break; | |
2489 | return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, | |
386309ce | 2490 | lport, timeout); |
11b56188 CL |
2491 | } |
2492 | return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); | |
2493 | } | |
2494 | ||
9a05753b CL |
2495 | /** |
2496 | * fcoe_vport_create() - create an fc_host/scsi_host for a vport | |
2497 | * @vport: fc_vport object to create a new fc_host for | |
2498 | * @disabled: start the new fc_host in a disabled state by default? | |
2499 | * | |
2500 | * Returns: 0 for success | |
2501 | */ | |
2502 | static int fcoe_vport_create(struct fc_vport *vport, bool disabled) | |
2503 | { | |
2504 | struct Scsi_Host *shost = vport_to_shost(vport); | |
2505 | struct fc_lport *n_port = shost_priv(shost); | |
2506 | struct fcoe_port *port = lport_priv(n_port); | |
2507 | struct fcoe_interface *fcoe = port->fcoe; | |
2508 | struct net_device *netdev = fcoe->netdev; | |
2509 | struct fc_lport *vn_port; | |
2510 | ||
2511 | mutex_lock(&fcoe_config_mutex); | |
2512 | vn_port = fcoe_if_create(fcoe, &vport->dev, 1); | |
2513 | mutex_unlock(&fcoe_config_mutex); | |
2514 | ||
2515 | if (IS_ERR(vn_port)) { | |
2516 | printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", | |
2517 | netdev->name); | |
2518 | return -EIO; | |
2519 | } | |
2520 | ||
2521 | if (disabled) { | |
2522 | fc_vport_set_state(vport, FC_VPORT_DISABLED); | |
2523 | } else { | |
2524 | vn_port->boot_time = jiffies; | |
2525 | fc_fabric_login(vn_port); | |
2526 | fc_vport_setlink(vn_port); | |
2527 | } | |
2528 | return 0; | |
2529 | } | |
2530 | ||
2531 | /** | |
2532 | * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport | |
2533 | * @vport: fc_vport object that is being destroyed | |
2534 | * | |
2535 | * Returns: 0 for success | |
2536 | */ | |
2537 | static int fcoe_vport_destroy(struct fc_vport *vport) | |
2538 | { | |
2539 | struct Scsi_Host *shost = vport_to_shost(vport); | |
2540 | struct fc_lport *n_port = shost_priv(shost); | |
2541 | struct fc_lport *vn_port = vport->dd_data; | |
2542 | struct fcoe_port *port = lport_priv(vn_port); | |
2543 | ||
2544 | mutex_lock(&n_port->lp_mutex); | |
2545 | list_del(&vn_port->list); | |
2546 | mutex_unlock(&n_port->lp_mutex); | |
2547 | schedule_work(&port->destroy_work); | |
2548 | return 0; | |
2549 | } | |
2550 | ||
2551 | /** | |
2552 | * fcoe_vport_disable() - change vport state | |
2553 | * @vport: vport to bring online/offline | |
2554 | * @disable: should the vport be disabled? | |
2555 | */ | |
2556 | static int fcoe_vport_disable(struct fc_vport *vport, bool disable) | |
2557 | { | |
2558 | struct fc_lport *lport = vport->dd_data; | |
2559 | ||
2560 | if (disable) { | |
2561 | fc_vport_set_state(vport, FC_VPORT_DISABLED); | |
2562 | fc_fabric_logoff(lport); | |
2563 | } else { | |
2564 | lport->boot_time = jiffies; | |
2565 | fc_fabric_login(lport); | |
2566 | fc_vport_setlink(lport); | |
2567 | } | |
2568 | ||
2569 | return 0; | |
2570 | } | |
2571 | ||
dc8596d3 CL |
2572 | /** |
2573 | * fcoe_vport_set_symbolic_name() - append vport string to symbolic name | |
2574 | * @vport: fc_vport with a new symbolic name string | |
2575 | * | |
2576 | * After generating a new symbolic name string, a new RSPN_ID request is | |
2577 | * sent to the name server. There is no response handler, so if it fails | |
2578 | * for some reason it will not be retried. | |
2579 | */ | |
2580 | static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) | |
2581 | { | |
2582 | struct fc_lport *lport = vport->dd_data; | |
2583 | struct fc_frame *fp; | |
2584 | size_t len; | |
2585 | ||
2586 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, | |
2587 | "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, | |
2588 | fcoe_netdev(lport)->name, vport->symbolic_name); | |
2589 | ||
2590 | if (lport->state != LPORT_ST_READY) | |
2591 | return; | |
2592 | ||
2593 | len = strnlen(fc_host_symbolic_name(lport->host), 255); | |
2594 | fp = fc_frame_alloc(lport, | |
2595 | sizeof(struct fc_ct_hdr) + | |
2596 | sizeof(struct fc_ns_rspn) + len); | |
2597 | if (!fp) | |
2598 | return; | |
2599 | lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, | |
b94f8951 | 2600 | NULL, NULL, 3 * lport->r_a_tov); |
dc8596d3 | 2601 | } |
b84056bf YZ |
2602 | |
2603 | /** | |
2604 | * fcoe_get_lesb() - Fill the FCoE Link Error Status Block | |
2605 | * @lport: the local port | |
2606 | * @fc_lesb: the link error status block | |
2607 | */ | |
2608 | static void fcoe_get_lesb(struct fc_lport *lport, | |
2609 | struct fc_els_lesb *fc_lesb) | |
2610 | { | |
2611 | unsigned int cpu; | |
2612 | u32 lfc, vlfc, mdac; | |
2613 | struct fcoe_dev_stats *devst; | |
2614 | struct fcoe_fc_els_lesb *lesb; | |
2615 | struct net_device *netdev = fcoe_netdev(lport); | |
2616 | ||
2617 | lfc = 0; | |
2618 | vlfc = 0; | |
2619 | mdac = 0; | |
2620 | lesb = (struct fcoe_fc_els_lesb *)fc_lesb; | |
2621 | memset(lesb, 0, sizeof(*lesb)); | |
2622 | for_each_possible_cpu(cpu) { | |
2623 | devst = per_cpu_ptr(lport->dev_stats, cpu); | |
2624 | lfc += devst->LinkFailureCount; | |
2625 | vlfc += devst->VLinkFailureCount; | |
2626 | mdac += devst->MissDiscAdvCount; | |
2627 | } | |
2628 | lesb->lesb_link_fail = htonl(lfc); | |
2629 | lesb->lesb_vlink_fail = htonl(vlfc); | |
2630 | lesb->lesb_miss_fka = htonl(mdac); | |
2631 | lesb->lesb_fcs_error = htonl(dev_get_stats(netdev)->rx_crc_errors); | |
2632 | } |