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85b4aa49 | 1 | /* |
af7f85d9 | 2 | * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved. |
85b4aa49 RL |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | * | |
17 | * Maintained at www.Open-FCoE.org | |
18 | */ | |
19 | ||
20 | #include <linux/module.h> | |
21 | #include <linux/version.h> | |
85b4aa49 | 22 | #include <linux/spinlock.h> |
85b4aa49 RL |
23 | #include <linux/netdevice.h> |
24 | #include <linux/etherdevice.h> | |
25 | #include <linux/ethtool.h> | |
26 | #include <linux/if_ether.h> | |
27 | #include <linux/if_vlan.h> | |
85b4aa49 RL |
28 | #include <linux/crc32.h> |
29 | #include <linux/cpu.h> | |
30 | #include <linux/fs.h> | |
31 | #include <linux/sysfs.h> | |
32 | #include <linux/ctype.h> | |
33 | #include <scsi/scsi_tcq.h> | |
34 | #include <scsi/scsicam.h> | |
35 | #include <scsi/scsi_transport.h> | |
36 | #include <scsi/scsi_transport_fc.h> | |
37 | #include <net/rtnetlink.h> | |
38 | ||
39 | #include <scsi/fc/fc_encaps.h> | |
97c8389d | 40 | #include <scsi/fc/fc_fip.h> |
85b4aa49 RL |
41 | |
42 | #include <scsi/libfc.h> | |
43 | #include <scsi/fc_frame.h> | |
44 | #include <scsi/libfcoe.h> | |
85b4aa49 | 45 | |
fdd78027 | 46 | #include "fcoe.h" |
7f349142 | 47 | |
85b4aa49 RL |
48 | MODULE_AUTHOR("Open-FCoE.org"); |
49 | MODULE_DESCRIPTION("FCoE"); | |
9b34ecff | 50 | MODULE_LICENSE("GPL v2"); |
85b4aa49 | 51 | |
05cc7390 YZ |
52 | /* Performance tuning parameters for fcoe */ |
53 | static unsigned int fcoe_ddp_min; | |
54 | module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR); | |
55 | MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \ | |
56 | "Direct Data Placement (DDP)."); | |
57 | ||
dfc1d0fe CL |
58 | DEFINE_MUTEX(fcoe_config_mutex); |
59 | ||
e7a51997 JE |
60 | /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */ |
61 | static DECLARE_COMPLETION(fcoe_flush_completion); | |
62 | ||
85b4aa49 | 63 | /* fcoe host list */ |
090eb6c4 | 64 | /* must only by accessed under the RTNL mutex */ |
85b4aa49 | 65 | LIST_HEAD(fcoe_hostlist); |
5e5e92df | 66 | DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu); |
85b4aa49 | 67 | |
dd3fd72e | 68 | /* Function Prototypes */ |
1875f27e | 69 | static int fcoe_reset(struct Scsi_Host *); |
fdd78027 VD |
70 | static int fcoe_xmit(struct fc_lport *, struct fc_frame *); |
71 | static int fcoe_rcv(struct sk_buff *, struct net_device *, | |
72 | struct packet_type *, struct net_device *); | |
1875f27e RL |
73 | static int fcoe_percpu_receive_thread(void *); |
74 | static void fcoe_clean_pending_queue(struct fc_lport *); | |
75 | static void fcoe_percpu_clean(struct fc_lport *); | |
76 | static int fcoe_link_ok(struct fc_lport *); | |
fdd78027 VD |
77 | |
78 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); | |
79 | static int fcoe_hostlist_add(const struct fc_lport *); | |
fdd78027 | 80 | |
4bb6b515 | 81 | static void fcoe_check_wait_queue(struct fc_lport *, struct sk_buff *); |
85b4aa49 RL |
82 | static int fcoe_device_notification(struct notifier_block *, ulong, void *); |
83 | static void fcoe_dev_setup(void); | |
84 | static void fcoe_dev_cleanup(void); | |
1875f27e RL |
85 | static struct fcoe_interface |
86 | *fcoe_hostlist_lookup_port(const struct net_device *); | |
87 | ||
88 | static int fcoe_fip_recv(struct sk_buff *, struct net_device *, | |
89 | struct packet_type *, struct net_device *); | |
90 | ||
91 | static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *); | |
92 | static void fcoe_update_src_mac(struct fc_lport *, u8 *); | |
93 | static u8 *fcoe_get_src_mac(struct fc_lport *); | |
94 | static void fcoe_destroy_work(struct work_struct *); | |
95 | ||
96 | static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *, | |
97 | unsigned int); | |
98 | static int fcoe_ddp_done(struct fc_lport *, u16); | |
99 | ||
100 | static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *); | |
101 | ||
102 | static int fcoe_create(const char *, struct kernel_param *); | |
103 | static int fcoe_destroy(const char *, struct kernel_param *); | |
104 | ||
1875f27e RL |
105 | static struct fc_seq *fcoe_elsct_send(struct fc_lport *, |
106 | u32 did, struct fc_frame *, | |
107 | unsigned int op, | |
108 | void (*resp)(struct fc_seq *, | |
109 | struct fc_frame *, | |
110 | void *), | |
111 | void *, u32 timeout); | |
112 | ||
113 | module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR); | |
114 | __MODULE_PARM_TYPE(create, "string"); | |
115 | MODULE_PARM_DESC(create, "Create fcoe fcoe using net device passed in."); | |
116 | module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR); | |
117 | __MODULE_PARM_TYPE(destroy, "string"); | |
118 | MODULE_PARM_DESC(destroy, "Destroy fcoe fcoe"); | |
119 | ||
120 | /* notification function for packets from net device */ | |
85b4aa49 RL |
121 | static struct notifier_block fcoe_notifier = { |
122 | .notifier_call = fcoe_device_notification, | |
123 | }; | |
124 | ||
1875f27e RL |
125 | /* notification function for CPU hotplug events */ |
126 | static struct notifier_block fcoe_cpu_notifier = { | |
127 | .notifier_call = fcoe_cpu_callback, | |
128 | }; | |
129 | ||
e9084bb8 CL |
130 | static struct scsi_transport_template *fcoe_transport_template; |
131 | static struct scsi_transport_template *fcoe_vport_transport_template; | |
7f349142 | 132 | |
1875f27e RL |
133 | static int fcoe_vport_destroy(struct fc_vport *); |
134 | static int fcoe_vport_create(struct fc_vport *, bool disabled); | |
135 | static int fcoe_vport_disable(struct fc_vport *, bool disable); | |
136 | static void fcoe_set_vport_symbolic_name(struct fc_vport *); | |
137 | ||
138 | static struct libfc_function_template fcoe_libfc_fcn_templ = { | |
139 | .frame_send = fcoe_xmit, | |
140 | .ddp_setup = fcoe_ddp_setup, | |
141 | .ddp_done = fcoe_ddp_done, | |
142 | .elsct_send = fcoe_elsct_send, | |
143 | }; | |
9a05753b | 144 | |
7f349142 VD |
145 | struct fc_function_template fcoe_transport_function = { |
146 | .show_host_node_name = 1, | |
147 | .show_host_port_name = 1, | |
148 | .show_host_supported_classes = 1, | |
149 | .show_host_supported_fc4s = 1, | |
150 | .show_host_active_fc4s = 1, | |
151 | .show_host_maxframe_size = 1, | |
152 | ||
153 | .show_host_port_id = 1, | |
154 | .show_host_supported_speeds = 1, | |
155 | .get_host_speed = fc_get_host_speed, | |
156 | .show_host_speed = 1, | |
157 | .show_host_port_type = 1, | |
158 | .get_host_port_state = fc_get_host_port_state, | |
159 | .show_host_port_state = 1, | |
160 | .show_host_symbolic_name = 1, | |
161 | ||
162 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
163 | .show_rport_maxframe_size = 1, | |
164 | .show_rport_supported_classes = 1, | |
165 | ||
166 | .show_host_fabric_name = 1, | |
167 | .show_starget_node_name = 1, | |
168 | .show_starget_port_name = 1, | |
169 | .show_starget_port_id = 1, | |
170 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
171 | .show_rport_dev_loss_tmo = 1, | |
172 | .get_fc_host_stats = fc_get_host_stats, | |
173 | .issue_fc_host_lip = fcoe_reset, | |
174 | ||
175 | .terminate_rport_io = fc_rport_terminate_io, | |
9a05753b CL |
176 | |
177 | .vport_create = fcoe_vport_create, | |
178 | .vport_delete = fcoe_vport_destroy, | |
179 | .vport_disable = fcoe_vport_disable, | |
dc8596d3 | 180 | .set_vport_symbolic_name = fcoe_set_vport_symbolic_name, |
a51ab396 SM |
181 | |
182 | .bsg_request = fc_lport_bsg_request, | |
7f349142 VD |
183 | }; |
184 | ||
e9084bb8 CL |
185 | struct fc_function_template fcoe_vport_transport_function = { |
186 | .show_host_node_name = 1, | |
187 | .show_host_port_name = 1, | |
188 | .show_host_supported_classes = 1, | |
189 | .show_host_supported_fc4s = 1, | |
190 | .show_host_active_fc4s = 1, | |
191 | .show_host_maxframe_size = 1, | |
192 | ||
193 | .show_host_port_id = 1, | |
194 | .show_host_supported_speeds = 1, | |
195 | .get_host_speed = fc_get_host_speed, | |
196 | .show_host_speed = 1, | |
197 | .show_host_port_type = 1, | |
198 | .get_host_port_state = fc_get_host_port_state, | |
199 | .show_host_port_state = 1, | |
200 | .show_host_symbolic_name = 1, | |
201 | ||
202 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
203 | .show_rport_maxframe_size = 1, | |
204 | .show_rport_supported_classes = 1, | |
205 | ||
206 | .show_host_fabric_name = 1, | |
207 | .show_starget_node_name = 1, | |
208 | .show_starget_port_name = 1, | |
209 | .show_starget_port_id = 1, | |
210 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
211 | .show_rport_dev_loss_tmo = 1, | |
212 | .get_fc_host_stats = fc_get_host_stats, | |
213 | .issue_fc_host_lip = fcoe_reset, | |
214 | ||
215 | .terminate_rport_io = fc_rport_terminate_io, | |
a51ab396 SM |
216 | |
217 | .bsg_request = fc_lport_bsg_request, | |
e9084bb8 CL |
218 | }; |
219 | ||
7f349142 VD |
220 | static struct scsi_host_template fcoe_shost_template = { |
221 | .module = THIS_MODULE, | |
222 | .name = "FCoE Driver", | |
223 | .proc_name = FCOE_NAME, | |
224 | .queuecommand = fc_queuecommand, | |
225 | .eh_abort_handler = fc_eh_abort, | |
226 | .eh_device_reset_handler = fc_eh_device_reset, | |
227 | .eh_host_reset_handler = fc_eh_host_reset, | |
228 | .slave_alloc = fc_slave_alloc, | |
229 | .change_queue_depth = fc_change_queue_depth, | |
230 | .change_queue_type = fc_change_queue_type, | |
231 | .this_id = -1, | |
14caf44c | 232 | .cmd_per_lun = 3, |
7f349142 VD |
233 | .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, |
234 | .use_clustering = ENABLE_CLUSTERING, | |
235 | .sg_tablesize = SG_ALL, | |
236 | .max_sectors = 0xffff, | |
237 | }; | |
238 | ||
54b649f8 | 239 | /** |
1875f27e RL |
240 | * fcoe_interface_setup() - Setup a FCoE interface |
241 | * @fcoe: The new FCoE interface | |
242 | * @netdev: The net device that the fcoe interface is on | |
54b649f8 CL |
243 | * |
244 | * Returns : 0 for success | |
2e70e241 | 245 | * Locking: must be called with the RTNL mutex held |
54b649f8 CL |
246 | */ |
247 | static int fcoe_interface_setup(struct fcoe_interface *fcoe, | |
248 | struct net_device *netdev) | |
249 | { | |
250 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
251 | struct netdev_hw_addr *ha; | |
5bab87e6 | 252 | struct net_device *real_dev; |
54b649f8 | 253 | u8 flogi_maddr[ETH_ALEN]; |
b7a727f1 | 254 | const struct net_device_ops *ops; |
54b649f8 CL |
255 | |
256 | fcoe->netdev = netdev; | |
257 | ||
b7a727f1 YZ |
258 | /* Let LLD initialize for FCoE */ |
259 | ops = netdev->netdev_ops; | |
260 | if (ops->ndo_fcoe_enable) { | |
261 | if (ops->ndo_fcoe_enable(netdev)) | |
262 | FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE" | |
263 | " specific feature for LLD.\n"); | |
264 | } | |
265 | ||
54b649f8 CL |
266 | /* Do not support for bonding device */ |
267 | if ((netdev->priv_flags & IFF_MASTER_ALB) || | |
268 | (netdev->priv_flags & IFF_SLAVE_INACTIVE) || | |
269 | (netdev->priv_flags & IFF_MASTER_8023AD)) { | |
59d92516 | 270 | FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n"); |
54b649f8 CL |
271 | return -EOPNOTSUPP; |
272 | } | |
273 | ||
274 | /* look for SAN MAC address, if multiple SAN MACs exist, only | |
275 | * use the first one for SPMA */ | |
5bab87e6 YZ |
276 | real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ? |
277 | vlan_dev_real_dev(netdev) : netdev; | |
54b649f8 | 278 | rcu_read_lock(); |
5bab87e6 | 279 | for_each_dev_addr(real_dev, ha) { |
54b649f8 | 280 | if ((ha->type == NETDEV_HW_ADDR_T_SAN) && |
bf361707 | 281 | (is_valid_ether_addr(ha->addr))) { |
54b649f8 CL |
282 | memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); |
283 | fip->spma = 1; | |
284 | break; | |
285 | } | |
286 | } | |
287 | rcu_read_unlock(); | |
288 | ||
289 | /* setup Source Mac Address */ | |
290 | if (!fip->spma) | |
291 | memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); | |
292 | ||
293 | /* | |
294 | * Add FCoE MAC address as second unicast MAC address | |
295 | * or enter promiscuous mode if not capable of listening | |
296 | * for multiple unicast MACs. | |
297 | */ | |
54b649f8 CL |
298 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
299 | dev_unicast_add(netdev, flogi_maddr); | |
300 | if (fip->spma) | |
301 | dev_unicast_add(netdev, fip->ctl_src_addr); | |
302 | dev_mc_add(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0); | |
54b649f8 CL |
303 | |
304 | /* | |
305 | * setup the receive function from ethernet driver | |
306 | * on the ethertype for the given device | |
307 | */ | |
308 | fcoe->fcoe_packet_type.func = fcoe_rcv; | |
309 | fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE); | |
310 | fcoe->fcoe_packet_type.dev = netdev; | |
311 | dev_add_pack(&fcoe->fcoe_packet_type); | |
312 | ||
313 | fcoe->fip_packet_type.func = fcoe_fip_recv; | |
314 | fcoe->fip_packet_type.type = htons(ETH_P_FIP); | |
315 | fcoe->fip_packet_type.dev = netdev; | |
316 | dev_add_pack(&fcoe->fip_packet_type); | |
317 | ||
318 | return 0; | |
319 | } | |
320 | ||
030f4e00 | 321 | /** |
1875f27e RL |
322 | * fcoe_interface_create() - Create a FCoE interface on a net device |
323 | * @netdev: The net device to create the FCoE interface on | |
030f4e00 CL |
324 | * |
325 | * Returns: pointer to a struct fcoe_interface or NULL on error | |
326 | */ | |
327 | static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev) | |
328 | { | |
329 | struct fcoe_interface *fcoe; | |
59d92516 | 330 | int err; |
030f4e00 CL |
331 | |
332 | fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL); | |
333 | if (!fcoe) { | |
334 | FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n"); | |
335 | return NULL; | |
336 | } | |
337 | ||
2e70e241 | 338 | dev_hold(netdev); |
030f4e00 | 339 | kref_init(&fcoe->kref); |
54b649f8 CL |
340 | |
341 | /* | |
342 | * Initialize FIP. | |
343 | */ | |
344 | fcoe_ctlr_init(&fcoe->ctlr); | |
345 | fcoe->ctlr.send = fcoe_fip_send; | |
346 | fcoe->ctlr.update_mac = fcoe_update_src_mac; | |
11b56188 | 347 | fcoe->ctlr.get_src_addr = fcoe_get_src_mac; |
54b649f8 | 348 | |
59d92516 | 349 | err = fcoe_interface_setup(fcoe, netdev); |
350 | if (err) { | |
351 | fcoe_ctlr_destroy(&fcoe->ctlr); | |
352 | kfree(fcoe); | |
353 | dev_put(netdev); | |
354 | return NULL; | |
355 | } | |
030f4e00 CL |
356 | |
357 | return fcoe; | |
358 | } | |
359 | ||
54b649f8 | 360 | /** |
1875f27e RL |
361 | * fcoe_interface_cleanup() - Clean up a FCoE interface |
362 | * @fcoe: The FCoE interface to be cleaned up | |
2e70e241 CL |
363 | * |
364 | * Caller must be holding the RTNL mutex | |
54b649f8 CL |
365 | */ |
366 | void fcoe_interface_cleanup(struct fcoe_interface *fcoe) | |
367 | { | |
368 | struct net_device *netdev = fcoe->netdev; | |
369 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
370 | u8 flogi_maddr[ETH_ALEN]; | |
b7a727f1 | 371 | const struct net_device_ops *ops; |
54b649f8 CL |
372 | |
373 | /* | |
374 | * Don't listen for Ethernet packets anymore. | |
375 | * synchronize_net() ensures that the packet handlers are not running | |
376 | * on another CPU. dev_remove_pack() would do that, this calls the | |
377 | * unsyncronized version __dev_remove_pack() to avoid multiple delays. | |
378 | */ | |
379 | __dev_remove_pack(&fcoe->fcoe_packet_type); | |
380 | __dev_remove_pack(&fcoe->fip_packet_type); | |
381 | synchronize_net(); | |
382 | ||
54b649f8 | 383 | /* Delete secondary MAC addresses */ |
54b649f8 CL |
384 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
385 | dev_unicast_delete(netdev, flogi_maddr); | |
54b649f8 CL |
386 | if (fip->spma) |
387 | dev_unicast_delete(netdev, fip->ctl_src_addr); | |
388 | dev_mc_delete(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0); | |
b7a727f1 YZ |
389 | |
390 | /* Tell the LLD we are done w/ FCoE */ | |
391 | ops = netdev->netdev_ops; | |
392 | if (ops->ndo_fcoe_disable) { | |
393 | if (ops->ndo_fcoe_disable(netdev)) | |
394 | FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" | |
395 | " specific feature for LLD.\n"); | |
396 | } | |
54b649f8 CL |
397 | } |
398 | ||
030f4e00 CL |
399 | /** |
400 | * fcoe_interface_release() - fcoe_port kref release function | |
1875f27e | 401 | * @kref: Embedded reference count in an fcoe_interface struct |
030f4e00 CL |
402 | */ |
403 | static void fcoe_interface_release(struct kref *kref) | |
404 | { | |
405 | struct fcoe_interface *fcoe; | |
2e70e241 | 406 | struct net_device *netdev; |
030f4e00 CL |
407 | |
408 | fcoe = container_of(kref, struct fcoe_interface, kref); | |
2e70e241 CL |
409 | netdev = fcoe->netdev; |
410 | /* tear-down the FCoE controller */ | |
411 | fcoe_ctlr_destroy(&fcoe->ctlr); | |
030f4e00 | 412 | kfree(fcoe); |
2e70e241 | 413 | dev_put(netdev); |
030f4e00 CL |
414 | } |
415 | ||
416 | /** | |
1875f27e RL |
417 | * fcoe_interface_get() - Get a reference to a FCoE interface |
418 | * @fcoe: The FCoE interface to be held | |
030f4e00 CL |
419 | */ |
420 | static inline void fcoe_interface_get(struct fcoe_interface *fcoe) | |
421 | { | |
422 | kref_get(&fcoe->kref); | |
423 | } | |
424 | ||
425 | /** | |
1875f27e RL |
426 | * fcoe_interface_put() - Put a reference to a FCoE interface |
427 | * @fcoe: The FCoE interface to be released | |
030f4e00 CL |
428 | */ |
429 | static inline void fcoe_interface_put(struct fcoe_interface *fcoe) | |
430 | { | |
431 | kref_put(&fcoe->kref, fcoe_interface_release); | |
432 | } | |
433 | ||
ab6b85c1 | 434 | /** |
1875f27e RL |
435 | * fcoe_fip_recv() - Handler for received FIP frames |
436 | * @skb: The receive skb | |
437 | * @netdev: The associated net device | |
438 | * @ptype: The packet_type structure which was used to register this handler | |
439 | * @orig_dev: The original net_device the the skb was received on. | |
440 | * (in case dev is a bond) | |
ab6b85c1 VD |
441 | * |
442 | * Returns: 0 for success | |
443 | */ | |
1875f27e | 444 | static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, |
ab6b85c1 VD |
445 | struct packet_type *ptype, |
446 | struct net_device *orig_dev) | |
447 | { | |
259ad85d | 448 | struct fcoe_interface *fcoe; |
ab6b85c1 | 449 | |
259ad85d | 450 | fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); |
3fe9a0ba | 451 | fcoe_ctlr_recv(&fcoe->ctlr, skb); |
ab6b85c1 VD |
452 | return 0; |
453 | } | |
454 | ||
455 | /** | |
1875f27e RL |
456 | * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame |
457 | * @fip: The FCoE controller | |
458 | * @skb: The FIP packet to be sent | |
ab6b85c1 VD |
459 | */ |
460 | static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
461 | { | |
3fe9a0ba | 462 | skb->dev = fcoe_from_ctlr(fip)->netdev; |
ab6b85c1 VD |
463 | dev_queue_xmit(skb); |
464 | } | |
465 | ||
466 | /** | |
1875f27e RL |
467 | * fcoe_update_src_mac() - Update the Ethernet MAC filters |
468 | * @lport: The local port to update the source MAC on | |
469 | * @addr: Unicast MAC address to add | |
ab6b85c1 VD |
470 | * |
471 | * Remove any previously-set unicast MAC filter. | |
472 | * Add secondary FCoE MAC address filter for our OUI. | |
473 | */ | |
11b56188 | 474 | static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) |
ab6b85c1 | 475 | { |
11b56188 CL |
476 | struct fcoe_port *port = lport_priv(lport); |
477 | struct fcoe_interface *fcoe = port->fcoe; | |
25024989 | 478 | |
ab6b85c1 | 479 | rtnl_lock(); |
11b56188 CL |
480 | if (!is_zero_ether_addr(port->data_src_addr)) |
481 | dev_unicast_delete(fcoe->netdev, port->data_src_addr); | |
482 | if (!is_zero_ether_addr(addr)) | |
483 | dev_unicast_add(fcoe->netdev, addr); | |
484 | memcpy(port->data_src_addr, addr, ETH_ALEN); | |
ab6b85c1 VD |
485 | rtnl_unlock(); |
486 | } | |
487 | ||
11b56188 CL |
488 | /** |
489 | * fcoe_get_src_mac() - return the Ethernet source address for an lport | |
490 | * @lport: libfc lport | |
491 | */ | |
492 | static u8 *fcoe_get_src_mac(struct fc_lport *lport) | |
493 | { | |
494 | struct fcoe_port *port = lport_priv(lport); | |
495 | ||
496 | return port->data_src_addr; | |
497 | } | |
498 | ||
7f349142 | 499 | /** |
1875f27e RL |
500 | * fcoe_lport_config() - Set up a local port |
501 | * @lport: The local port to be setup | |
7f349142 VD |
502 | * |
503 | * Returns: 0 for success | |
504 | */ | |
1875f27e | 505 | static int fcoe_lport_config(struct fc_lport *lport) |
7f349142 | 506 | { |
1875f27e RL |
507 | lport->link_up = 0; |
508 | lport->qfull = 0; | |
509 | lport->max_retry_count = 3; | |
510 | lport->max_rport_retry_count = 3; | |
511 | lport->e_d_tov = 2 * 1000; /* FC-FS default */ | |
512 | lport->r_a_tov = 2 * 2 * 1000; | |
513 | lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | | |
514 | FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); | |
515 | lport->does_npiv = 1; | |
516 | ||
517 | fc_lport_init_stats(lport); | |
7f349142 VD |
518 | |
519 | /* lport fc_lport related configuration */ | |
1875f27e | 520 | fc_lport_config(lport); |
7f349142 VD |
521 | |
522 | /* offload related configuration */ | |
1875f27e RL |
523 | lport->crc_offload = 0; |
524 | lport->seq_offload = 0; | |
525 | lport->lro_enabled = 0; | |
526 | lport->lro_xid = 0; | |
527 | lport->lso_max = 0; | |
7f349142 VD |
528 | |
529 | return 0; | |
530 | } | |
531 | ||
1047f221 | 532 | /** |
1875f27e RL |
533 | * fcoe_queue_timer() - The fcoe queue timer |
534 | * @lport: The local port | |
1047f221 VD |
535 | * |
536 | * Calls fcoe_check_wait_queue on timeout | |
1047f221 | 537 | */ |
1875f27e | 538 | static void fcoe_queue_timer(ulong lport) |
1047f221 | 539 | { |
1875f27e | 540 | fcoe_check_wait_queue((struct fc_lport *)lport, NULL); |
1047f221 VD |
541 | } |
542 | ||
7f349142 | 543 | /** |
1875f27e RL |
544 | * fcoe_netdev_config() - Set up net devive for SW FCoE |
545 | * @lport: The local port that is associated with the net device | |
546 | * @netdev: The associated net device | |
7f349142 | 547 | * |
1875f27e | 548 | * Must be called after fcoe_lport_config() as it will use local port mutex |
7f349142 | 549 | * |
1875f27e | 550 | * Returns: 0 for success |
7f349142 | 551 | */ |
1875f27e | 552 | static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) |
7f349142 VD |
553 | { |
554 | u32 mfs; | |
555 | u64 wwnn, wwpn; | |
25024989 | 556 | struct fcoe_interface *fcoe; |
014f5c3f | 557 | struct fcoe_port *port; |
cc0136c2 | 558 | int vid = 0; |
7f349142 VD |
559 | |
560 | /* Setup lport private data to point to fcoe softc */ | |
1875f27e | 561 | port = lport_priv(lport); |
25024989 | 562 | fcoe = port->fcoe; |
7f349142 VD |
563 | |
564 | /* | |
565 | * Determine max frame size based on underlying device and optional | |
566 | * user-configured limit. If the MFS is too low, fcoe_link_ok() | |
567 | * will return 0, so do this first. | |
568 | */ | |
7221d7e5 YZ |
569 | mfs = netdev->mtu; |
570 | if (netdev->features & NETIF_F_FCOE_MTU) { | |
571 | mfs = FCOE_MTU; | |
572 | FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); | |
573 | } | |
574 | mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); | |
1875f27e | 575 | if (fc_set_mfs(lport, mfs)) |
7f349142 VD |
576 | return -EINVAL; |
577 | ||
7f349142 | 578 | /* offload features support */ |
1d1b88dc | 579 | if (netdev->features & NETIF_F_SG) |
1875f27e | 580 | lport->sg_supp = 1; |
7f349142 | 581 | |
7f349142 | 582 | if (netdev->features & NETIF_F_FCOE_CRC) { |
1875f27e | 583 | lport->crc_offload = 1; |
d5488eb9 | 584 | FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); |
7f349142 | 585 | } |
7f349142 | 586 | if (netdev->features & NETIF_F_FSO) { |
1875f27e RL |
587 | lport->seq_offload = 1; |
588 | lport->lso_max = netdev->gso_max_size; | |
d5488eb9 | 589 | FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", |
1875f27e | 590 | lport->lso_max); |
7f349142 | 591 | } |
7f349142 | 592 | if (netdev->fcoe_ddp_xid) { |
1875f27e RL |
593 | lport->lro_enabled = 1; |
594 | lport->lro_xid = netdev->fcoe_ddp_xid; | |
d5488eb9 | 595 | FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", |
1875f27e | 596 | lport->lro_xid); |
7f349142 | 597 | } |
014f5c3f CL |
598 | skb_queue_head_init(&port->fcoe_pending_queue); |
599 | port->fcoe_pending_queue_active = 0; | |
1875f27e | 600 | setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport); |
7f349142 | 601 | |
1875f27e | 602 | if (!lport->vport) { |
cc0136c2 YZ |
603 | /* |
604 | * Use NAA 1&2 (FC-FS Rev. 2.0, Sec. 15) to generate WWNN/WWPN: | |
605 | * For WWNN, we use NAA 1 w/ bit 27-16 of word 0 as 0. | |
606 | * For WWPN, we use NAA 2 w/ bit 27-16 of word 0 from VLAN ID | |
607 | */ | |
608 | if (netdev->priv_flags & IFF_802_1Q_VLAN) | |
609 | vid = vlan_dev_vlan_id(netdev); | |
75ea89ef | 610 | wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0); |
1875f27e | 611 | fc_set_wwnn(lport, wwnn); |
cc0136c2 | 612 | wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 2, vid); |
1875f27e | 613 | fc_set_wwpn(lport, wwpn); |
9a05753b | 614 | } |
7f349142 | 615 | |
7f349142 VD |
616 | return 0; |
617 | } | |
618 | ||
619 | /** | |
1875f27e RL |
620 | * fcoe_shost_config() - Set up the SCSI host associated with a local port |
621 | * @lport: The local port | |
622 | * @shost: The SCSI host to associate with the local port | |
623 | * @dev: The device associated with the SCSI host | |
7f349142 VD |
624 | * |
625 | * Must be called after fcoe_lport_config() and fcoe_netdev_config() | |
626 | * | |
1875f27e | 627 | * Returns: 0 for success |
7f349142 | 628 | */ |
1875f27e RL |
629 | static int fcoe_shost_config(struct fc_lport *lport, struct Scsi_Host *shost, |
630 | struct device *dev) | |
7f349142 VD |
631 | { |
632 | int rc = 0; | |
633 | ||
634 | /* lport scsi host config */ | |
1875f27e RL |
635 | lport->host->max_lun = FCOE_MAX_LUN; |
636 | lport->host->max_id = FCOE_MAX_FCP_TARGET; | |
637 | lport->host->max_channel = 0; | |
638 | if (lport->vport) | |
639 | lport->host->transportt = fcoe_vport_transport_template; | |
e9084bb8 | 640 | else |
1875f27e | 641 | lport->host->transportt = fcoe_transport_template; |
7f349142 VD |
642 | |
643 | /* add the new host to the SCSI-ml */ | |
1875f27e | 644 | rc = scsi_add_host(lport->host, dev); |
7f349142 | 645 | if (rc) { |
1875f27e | 646 | FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " |
d5488eb9 | 647 | "error on scsi_add_host\n"); |
7f349142 VD |
648 | return rc; |
649 | } | |
9a05753b | 650 | |
1875f27e RL |
651 | if (!lport->vport) |
652 | fc_host_max_npiv_vports(lport->host) = USHORT_MAX; | |
9a05753b | 653 | |
1875f27e | 654 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, |
5baa17c3 | 655 | "%s v%s over %s", FCOE_NAME, FCOE_VERSION, |
1875f27e | 656 | fcoe_netdev(lport)->name); |
7f349142 VD |
657 | |
658 | return 0; | |
659 | } | |
660 | ||
1875f27e RL |
661 | /** |
662 | * fcoe_oem_match() - The match routine for the offloaded exchange manager | |
663 | * @fp: The I/O frame | |
d7179680 | 664 | * |
1875f27e RL |
665 | * This routine will be associated with an exchange manager (EM). When |
666 | * the libfc exchange handling code is looking for an EM to use it will | |
667 | * call this routine and pass it the frame that it wishes to send. This | |
668 | * routine will return True if the associated EM is to be used and False | |
669 | * if the echange code should continue looking for an EM. | |
670 | * | |
671 | * The offload EM that this routine is associated with will handle any | |
672 | * packets that are for SCSI read requests. | |
673 | * | |
674 | * Returns: True for read types I/O, otherwise returns false. | |
d7179680 VD |
675 | */ |
676 | bool fcoe_oem_match(struct fc_frame *fp) | |
677 | { | |
05cc7390 YZ |
678 | return fc_fcp_is_read(fr_fsp(fp)) && |
679 | (fr_fsp(fp)->data_len > fcoe_ddp_min); | |
d7179680 VD |
680 | } |
681 | ||
7f349142 | 682 | /** |
1875f27e RL |
683 | * fcoe_em_config() - Allocate and configure an exchange manager |
684 | * @lport: The local port that the new EM will be associated with | |
7f349142 | 685 | * |
1875f27e | 686 | * Returns: 0 on success |
7f349142 | 687 | */ |
1875f27e | 688 | static inline int fcoe_em_config(struct fc_lport *lport) |
7f349142 | 689 | { |
1875f27e | 690 | struct fcoe_port *port = lport_priv(lport); |
25024989 CL |
691 | struct fcoe_interface *fcoe = port->fcoe; |
692 | struct fcoe_interface *oldfcoe = NULL; | |
1d1b88dc | 693 | struct net_device *old_real_dev, *cur_real_dev; |
d7179680 VD |
694 | u16 min_xid = FCOE_MIN_XID; |
695 | u16 max_xid = FCOE_MAX_XID; | |
696 | ||
697 | /* | |
698 | * Check if need to allocate an em instance for | |
699 | * offload exchange ids to be shared across all VN_PORTs/lport. | |
700 | */ | |
1875f27e RL |
701 | if (!lport->lro_enabled || !lport->lro_xid || |
702 | (lport->lro_xid >= max_xid)) { | |
703 | lport->lro_xid = 0; | |
d7179680 VD |
704 | goto skip_oem; |
705 | } | |
706 | ||
707 | /* | |
708 | * Reuse existing offload em instance in case | |
1d1b88dc | 709 | * it is already allocated on real eth device |
d7179680 | 710 | */ |
25024989 CL |
711 | if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
712 | cur_real_dev = vlan_dev_real_dev(fcoe->netdev); | |
1d1b88dc | 713 | else |
25024989 | 714 | cur_real_dev = fcoe->netdev; |
1d1b88dc | 715 | |
25024989 | 716 | list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { |
25024989 CL |
717 | if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
718 | old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); | |
1d1b88dc | 719 | else |
25024989 | 720 | old_real_dev = oldfcoe->netdev; |
1d1b88dc VD |
721 | |
722 | if (cur_real_dev == old_real_dev) { | |
991cbb60 | 723 | fcoe->oem = oldfcoe->oem; |
d7179680 VD |
724 | break; |
725 | } | |
726 | } | |
727 | ||
991cbb60 | 728 | if (fcoe->oem) { |
1875f27e | 729 | if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { |
d7179680 VD |
730 | printk(KERN_ERR "fcoe_em_config: failed to add " |
731 | "offload em:%p on interface:%s\n", | |
991cbb60 | 732 | fcoe->oem, fcoe->netdev->name); |
d7179680 VD |
733 | return -ENOMEM; |
734 | } | |
735 | } else { | |
1875f27e RL |
736 | fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, |
737 | FCOE_MIN_XID, lport->lro_xid, | |
738 | fcoe_oem_match); | |
991cbb60 | 739 | if (!fcoe->oem) { |
d7179680 VD |
740 | printk(KERN_ERR "fcoe_em_config: failed to allocate " |
741 | "em for offload exches on interface:%s\n", | |
25024989 | 742 | fcoe->netdev->name); |
d7179680 VD |
743 | return -ENOMEM; |
744 | } | |
745 | } | |
746 | ||
747 | /* | |
748 | * Exclude offload EM xid range from next EM xid range. | |
749 | */ | |
1875f27e | 750 | min_xid += lport->lro_xid + 1; |
d7179680 VD |
751 | |
752 | skip_oem: | |
1875f27e | 753 | if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { |
d7179680 | 754 | printk(KERN_ERR "fcoe_em_config: failed to " |
25024989 | 755 | "allocate em on interface %s\n", fcoe->netdev->name); |
7f349142 | 756 | return -ENOMEM; |
d7179680 | 757 | } |
7f349142 VD |
758 | |
759 | return 0; | |
760 | } | |
761 | ||
762 | /** | |
1875f27e RL |
763 | * fcoe_if_destroy() - Tear down a SW FCoE instance |
764 | * @lport: The local port to be destroyed | |
7f349142 | 765 | */ |
af7f85d9 | 766 | static void fcoe_if_destroy(struct fc_lport *lport) |
7f349142 | 767 | { |
014f5c3f CL |
768 | struct fcoe_port *port = lport_priv(lport); |
769 | struct fcoe_interface *fcoe = port->fcoe; | |
25024989 | 770 | struct net_device *netdev = fcoe->netdev; |
7f349142 | 771 | |
d5488eb9 | 772 | FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); |
7f349142 | 773 | |
7f349142 | 774 | /* Logout of the fabric */ |
af7f85d9 | 775 | fc_fabric_logoff(lport); |
7f349142 | 776 | |
54b649f8 CL |
777 | /* Cleanup the fc_lport */ |
778 | fc_lport_destroy(lport); | |
779 | fc_fcp_destroy(lport); | |
780 | ||
781 | /* Stop the transmit retry timer */ | |
782 | del_timer_sync(&port->timer); | |
ab6b85c1 | 783 | |
54b649f8 CL |
784 | /* Free existing transmit skbs */ |
785 | fcoe_clean_pending_queue(lport); | |
786 | ||
11b56188 CL |
787 | rtnl_lock(); |
788 | if (!is_zero_ether_addr(port->data_src_addr)) | |
789 | dev_unicast_delete(netdev, port->data_src_addr); | |
790 | rtnl_unlock(); | |
791 | ||
54b649f8 CL |
792 | /* receives may not be stopped until after this */ |
793 | fcoe_interface_put(fcoe); | |
7f349142 | 794 | |
f161fb72 | 795 | /* Free queued packets for the per-CPU receive threads */ |
af7f85d9 | 796 | fcoe_percpu_clean(lport); |
f161fb72 | 797 | |
7f349142 | 798 | /* Detach from the scsi-ml */ |
af7f85d9 CL |
799 | fc_remove_host(lport->host); |
800 | scsi_remove_host(lport->host); | |
7f349142 VD |
801 | |
802 | /* There are no more rports or I/O, free the EM */ | |
af7f85d9 | 803 | fc_exch_mgr_free(lport); |
7f349142 | 804 | |
7f349142 | 805 | /* Free memory used by statistical counters */ |
af7f85d9 | 806 | fc_lport_free_stats(lport); |
7f349142 | 807 | |
2e70e241 | 808 | /* Release the Scsi_Host */ |
af7f85d9 | 809 | scsi_host_put(lport->host); |
7f349142 VD |
810 | } |
811 | ||
1875f27e RL |
812 | /** |
813 | * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device | |
814 | * @lport: The local port to setup DDP for | |
815 | * @xid: The exchange ID for this DDP transfer | |
816 | * @sgl: The scatterlist describing this transfer | |
817 | * @sgc: The number of sg items | |
7f349142 | 818 | * |
1875f27e | 819 | * Returns: 0 if the DDP context was not configured |
7f349142 | 820 | */ |
1875f27e RL |
821 | static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, |
822 | struct scatterlist *sgl, unsigned int sgc) | |
7f349142 | 823 | { |
1875f27e | 824 | struct net_device *netdev = fcoe_netdev(lport); |
7f349142 | 825 | |
1875f27e RL |
826 | if (netdev->netdev_ops->ndo_fcoe_ddp_setup) |
827 | return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, | |
828 | xid, sgl, | |
829 | sgc); | |
7f349142 VD |
830 | |
831 | return 0; | |
832 | } | |
833 | ||
1875f27e RL |
834 | /** |
835 | * fcoe_ddp_done() - Call a LLD's ddp_done through the net device | |
836 | * @lport: The local port to complete DDP on | |
837 | * @xid: The exchange ID for this DDP transfer | |
7f349142 | 838 | * |
1875f27e | 839 | * Returns: the length of data that have been completed by DDP |
7f349142 | 840 | */ |
1875f27e | 841 | static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) |
7f349142 | 842 | { |
1875f27e | 843 | struct net_device *netdev = fcoe_netdev(lport); |
7f349142 | 844 | |
1875f27e RL |
845 | if (netdev->netdev_ops->ndo_fcoe_ddp_done) |
846 | return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); | |
7f349142 VD |
847 | return 0; |
848 | } | |
849 | ||
7f349142 | 850 | /** |
1875f27e RL |
851 | * fcoe_if_create() - Create a FCoE instance on an interface |
852 | * @fcoe: The FCoE interface to create a local port on | |
853 | * @parent: The device pointer to be the parent in sysfs for the SCSI host | |
854 | * @npiv: Indicates if the port is a vport or not | |
7f349142 | 855 | * |
1875f27e | 856 | * Creates a fc_lport instance and a Scsi_Host instance and configure them. |
7f349142 | 857 | * |
1875f27e | 858 | * Returns: The allocated fc_lport or an error pointer |
7f349142 | 859 | */ |
030f4e00 | 860 | static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, |
9a05753b | 861 | struct device *parent, int npiv) |
7f349142 | 862 | { |
1875f27e | 863 | struct net_device *netdev = fcoe->netdev; |
af7f85d9 | 864 | struct fc_lport *lport = NULL; |
014f5c3f | 865 | struct fcoe_port *port; |
7f349142 | 866 | struct Scsi_Host *shost; |
1875f27e | 867 | int rc; |
9a05753b CL |
868 | /* |
869 | * parent is only a vport if npiv is 1, | |
870 | * but we'll only use vport in that case so go ahead and set it | |
871 | */ | |
872 | struct fc_vport *vport = dev_to_vport(parent); | |
7f349142 | 873 | |
d5488eb9 | 874 | FCOE_NETDEV_DBG(netdev, "Create Interface\n"); |
7f349142 | 875 | |
9a05753b CL |
876 | if (!npiv) { |
877 | lport = libfc_host_alloc(&fcoe_shost_template, | |
878 | sizeof(struct fcoe_port)); | |
879 | } else { | |
880 | lport = libfc_vport_create(vport, | |
881 | sizeof(struct fcoe_port)); | |
882 | } | |
86221969 | 883 | if (!lport) { |
d5488eb9 | 884 | FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); |
af7f85d9 | 885 | rc = -ENOMEM; |
030f4e00 | 886 | goto out; |
7f349142 | 887 | } |
86221969 | 888 | shost = lport->host; |
014f5c3f | 889 | port = lport_priv(lport); |
2e70e241 | 890 | port->lport = lport; |
014f5c3f | 891 | port->fcoe = fcoe; |
2e70e241 | 892 | INIT_WORK(&port->destroy_work, fcoe_destroy_work); |
7f349142 | 893 | |
1875f27e | 894 | /* configure a fc_lport including the exchange manager */ |
af7f85d9 | 895 | rc = fcoe_lport_config(lport); |
7f349142 | 896 | if (rc) { |
d5488eb9 RL |
897 | FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " |
898 | "interface\n"); | |
7f349142 VD |
899 | goto out_host_put; |
900 | } | |
901 | ||
9a05753b CL |
902 | if (npiv) { |
903 | FCOE_NETDEV_DBG(netdev, "Setting vport names, 0x%llX 0x%llX\n", | |
1875f27e | 904 | vport->node_name, vport->port_name); |
9a05753b CL |
905 | fc_set_wwnn(lport, vport->node_name); |
906 | fc_set_wwpn(lport, vport->port_name); | |
907 | } | |
908 | ||
ab6b85c1 | 909 | /* configure lport network properties */ |
af7f85d9 | 910 | rc = fcoe_netdev_config(lport, netdev); |
ab6b85c1 | 911 | if (rc) { |
d5488eb9 RL |
912 | FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " |
913 | "interface\n"); | |
54b649f8 | 914 | goto out_lp_destroy; |
ab6b85c1 | 915 | } |
97c8389d | 916 | |
7f349142 | 917 | /* configure lport scsi host properties */ |
af7f85d9 | 918 | rc = fcoe_shost_config(lport, shost, parent); |
7f349142 | 919 | if (rc) { |
d5488eb9 RL |
920 | FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " |
921 | "interface\n"); | |
54b649f8 | 922 | goto out_lp_destroy; |
7f349142 VD |
923 | } |
924 | ||
96316099 | 925 | /* Initialize the library */ |
af7f85d9 | 926 | rc = fcoe_libfc_config(lport, &fcoe_libfc_fcn_templ); |
7f349142 | 927 | if (rc) { |
96316099 | 928 | FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " |
d5488eb9 | 929 | "interface\n"); |
96316099 | 930 | goto out_lp_destroy; |
7f349142 VD |
931 | } |
932 | ||
9a05753b CL |
933 | if (!npiv) { |
934 | /* | |
935 | * fcoe_em_alloc() and fcoe_hostlist_add() both | |
936 | * need to be atomic with respect to other changes to the | |
937 | * hostlist since fcoe_em_alloc() looks for an existing EM | |
938 | * instance on host list updated by fcoe_hostlist_add(). | |
939 | * | |
940 | * This is currently handled through the fcoe_config_mutex | |
941 | * begin held. | |
942 | */ | |
c863df33 | 943 | |
9a05753b CL |
944 | /* lport exch manager allocation */ |
945 | rc = fcoe_em_config(lport); | |
946 | if (rc) { | |
947 | FCOE_NETDEV_DBG(netdev, "Could not configure the EM " | |
1875f27e | 948 | "for the interface\n"); |
9a05753b CL |
949 | goto out_lp_destroy; |
950 | } | |
7f349142 VD |
951 | } |
952 | ||
030f4e00 | 953 | fcoe_interface_get(fcoe); |
af7f85d9 | 954 | return lport; |
7f349142 VD |
955 | |
956 | out_lp_destroy: | |
af7f85d9 | 957 | fc_exch_mgr_free(lport); |
7f349142 | 958 | out_host_put: |
af7f85d9 CL |
959 | scsi_host_put(lport->host); |
960 | out: | |
961 | return ERR_PTR(rc); | |
7f349142 VD |
962 | } |
963 | ||
964 | /** | |
1875f27e | 965 | * fcoe_if_init() - Initialization routine for fcoe.ko |
7f349142 | 966 | * |
1875f27e RL |
967 | * Attaches the SW FCoE transport to the FC transport |
968 | * | |
969 | * Returns: 0 on success | |
7f349142 VD |
970 | */ |
971 | static int __init fcoe_if_init(void) | |
972 | { | |
973 | /* attach to scsi transport */ | |
e9084bb8 CL |
974 | fcoe_transport_template = fc_attach_transport(&fcoe_transport_function); |
975 | fcoe_vport_transport_template = | |
976 | fc_attach_transport(&fcoe_vport_transport_function); | |
7f349142 | 977 | |
e9084bb8 | 978 | if (!fcoe_transport_template) { |
d5488eb9 | 979 | printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); |
7f349142 VD |
980 | return -ENODEV; |
981 | } | |
982 | ||
983 | return 0; | |
984 | } | |
985 | ||
986 | /** | |
1875f27e RL |
987 | * fcoe_if_exit() - Tear down fcoe.ko |
988 | * | |
989 | * Detaches the SW FCoE transport from the FC transport | |
7f349142 | 990 | * |
1875f27e | 991 | * Returns: 0 on success |
7f349142 VD |
992 | */ |
993 | int __exit fcoe_if_exit(void) | |
994 | { | |
e9084bb8 CL |
995 | fc_release_transport(fcoe_transport_template); |
996 | fc_release_transport(fcoe_vport_transport_template); | |
997 | fcoe_transport_template = NULL; | |
998 | fcoe_vport_transport_template = NULL; | |
7f349142 VD |
999 | return 0; |
1000 | } | |
1001 | ||
8976f424 | 1002 | /** |
1875f27e RL |
1003 | * fcoe_percpu_thread_create() - Create a receive thread for an online CPU |
1004 | * @cpu: The CPU index of the CPU to create a receive thread for | |
8976f424 RL |
1005 | */ |
1006 | static void fcoe_percpu_thread_create(unsigned int cpu) | |
1007 | { | |
1008 | struct fcoe_percpu_s *p; | |
1009 | struct task_struct *thread; | |
1010 | ||
1011 | p = &per_cpu(fcoe_percpu, cpu); | |
1012 | ||
1013 | thread = kthread_create(fcoe_percpu_receive_thread, | |
1014 | (void *)p, "fcoethread/%d", cpu); | |
1015 | ||
e7a51997 | 1016 | if (likely(!IS_ERR(thread))) { |
8976f424 RL |
1017 | kthread_bind(thread, cpu); |
1018 | wake_up_process(thread); | |
1019 | ||
1020 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1021 | p->thread = thread; | |
1022 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1023 | } | |
1024 | } | |
1025 | ||
1026 | /** | |
1875f27e RL |
1027 | * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU |
1028 | * @cpu: The CPU index of the CPU whose receive thread is to be destroyed | |
8976f424 RL |
1029 | * |
1030 | * Destroys a per-CPU Rx thread. Any pending skbs are moved to the | |
1031 | * current CPU's Rx thread. If the thread being destroyed is bound to | |
1032 | * the CPU processing this context the skbs will be freed. | |
1033 | */ | |
1034 | static void fcoe_percpu_thread_destroy(unsigned int cpu) | |
1035 | { | |
1036 | struct fcoe_percpu_s *p; | |
1037 | struct task_struct *thread; | |
1038 | struct page *crc_eof; | |
1039 | struct sk_buff *skb; | |
1040 | #ifdef CONFIG_SMP | |
1041 | struct fcoe_percpu_s *p0; | |
1042 | unsigned targ_cpu = smp_processor_id(); | |
1043 | #endif /* CONFIG_SMP */ | |
1044 | ||
d5488eb9 | 1045 | FCOE_DBG("Destroying receive thread for CPU %d\n", cpu); |
8976f424 RL |
1046 | |
1047 | /* Prevent any new skbs from being queued for this CPU. */ | |
1048 | p = &per_cpu(fcoe_percpu, cpu); | |
1049 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1050 | thread = p->thread; | |
1051 | p->thread = NULL; | |
1052 | crc_eof = p->crc_eof_page; | |
1053 | p->crc_eof_page = NULL; | |
1054 | p->crc_eof_offset = 0; | |
1055 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1056 | ||
1057 | #ifdef CONFIG_SMP | |
1058 | /* | |
1059 | * Don't bother moving the skb's if this context is running | |
1060 | * on the same CPU that is having its thread destroyed. This | |
1061 | * can easily happen when the module is removed. | |
1062 | */ | |
1063 | if (cpu != targ_cpu) { | |
1064 | p0 = &per_cpu(fcoe_percpu, targ_cpu); | |
1065 | spin_lock_bh(&p0->fcoe_rx_list.lock); | |
1066 | if (p0->thread) { | |
d5488eb9 RL |
1067 | FCOE_DBG("Moving frames from CPU %d to CPU %d\n", |
1068 | cpu, targ_cpu); | |
8976f424 RL |
1069 | |
1070 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1071 | __skb_queue_tail(&p0->fcoe_rx_list, skb); | |
1072 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
1073 | } else { | |
1074 | /* | |
1075 | * The targeted CPU is not initialized and cannot accept | |
1875f27e | 1076 | * new skbs. Unlock the targeted CPU and drop the skbs |
8976f424 RL |
1077 | * on the CPU that is going offline. |
1078 | */ | |
1079 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1080 | kfree_skb(skb); | |
1081 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
1082 | } | |
1083 | } else { | |
1084 | /* | |
1085 | * This scenario occurs when the module is being removed | |
1086 | * and all threads are being destroyed. skbs will continue | |
1087 | * to be shifted from the CPU thread that is being removed | |
1088 | * to the CPU thread associated with the CPU that is processing | |
1089 | * the module removal. Once there is only one CPU Rx thread it | |
1090 | * will reach this case and we will drop all skbs and later | |
1091 | * stop the thread. | |
1092 | */ | |
1093 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1094 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1095 | kfree_skb(skb); | |
1096 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1097 | } | |
1098 | #else | |
1099 | /* | |
dd3fd72e | 1100 | * This a non-SMP scenario where the singular Rx thread is |
8976f424 RL |
1101 | * being removed. Free all skbs and stop the thread. |
1102 | */ | |
1103 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1104 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1105 | kfree_skb(skb); | |
1106 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1107 | #endif | |
1108 | ||
1109 | if (thread) | |
1110 | kthread_stop(thread); | |
1111 | ||
1112 | if (crc_eof) | |
1113 | put_page(crc_eof); | |
1114 | } | |
1115 | ||
1116 | /** | |
1875f27e RL |
1117 | * fcoe_cpu_callback() - Handler for CPU hotplug events |
1118 | * @nfb: The callback data block | |
1119 | * @action: The event triggering the callback | |
1120 | * @hcpu: The index of the CPU that the event is for | |
8976f424 | 1121 | * |
1875f27e | 1122 | * This creates or destroys per-CPU data for fcoe |
8976f424 RL |
1123 | * |
1124 | * Returns NOTIFY_OK always. | |
1125 | */ | |
1126 | static int fcoe_cpu_callback(struct notifier_block *nfb, | |
1127 | unsigned long action, void *hcpu) | |
1128 | { | |
1129 | unsigned cpu = (unsigned long)hcpu; | |
1130 | ||
1131 | switch (action) { | |
1132 | case CPU_ONLINE: | |
1133 | case CPU_ONLINE_FROZEN: | |
d5488eb9 | 1134 | FCOE_DBG("CPU %x online: Create Rx thread\n", cpu); |
8976f424 RL |
1135 | fcoe_percpu_thread_create(cpu); |
1136 | break; | |
1137 | case CPU_DEAD: | |
1138 | case CPU_DEAD_FROZEN: | |
d5488eb9 | 1139 | FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu); |
8976f424 RL |
1140 | fcoe_percpu_thread_destroy(cpu); |
1141 | break; | |
1142 | default: | |
1143 | break; | |
1144 | } | |
1145 | return NOTIFY_OK; | |
1146 | } | |
1147 | ||
85b4aa49 | 1148 | /** |
1875f27e RL |
1149 | * fcoe_rcv() - Receive packets from a net device |
1150 | * @skb: The received packet | |
1151 | * @netdev: The net device that the packet was received on | |
1152 | * @ptype: The packet type context | |
1153 | * @olddev: The last device net device | |
85b4aa49 | 1154 | * |
1875f27e RL |
1155 | * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a |
1156 | * FC frame and passes the frame to libfc. | |
85b4aa49 RL |
1157 | * |
1158 | * Returns: 0 for success | |
34f42a07 | 1159 | */ |
1875f27e | 1160 | int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, |
85b4aa49 RL |
1161 | struct packet_type *ptype, struct net_device *olddev) |
1162 | { | |
1875f27e | 1163 | struct fc_lport *lport; |
85b4aa49 | 1164 | struct fcoe_rcv_info *fr; |
259ad85d | 1165 | struct fcoe_interface *fcoe; |
85b4aa49 | 1166 | struct fc_frame_header *fh; |
85b4aa49 | 1167 | struct fcoe_percpu_s *fps; |
b2f0091f | 1168 | unsigned int cpu; |
85b4aa49 | 1169 | |
259ad85d | 1170 | fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); |
1875f27e RL |
1171 | lport = fcoe->ctlr.lp; |
1172 | if (unlikely(!lport)) { | |
1173 | FCOE_NETDEV_DBG(netdev, "Cannot find hba structure"); | |
85b4aa49 RL |
1174 | goto err2; |
1175 | } | |
1875f27e | 1176 | if (!lport->link_up) |
97c8389d | 1177 | goto err2; |
85b4aa49 | 1178 | |
1875f27e | 1179 | FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p " |
d5488eb9 RL |
1180 | "data:%p tail:%p end:%p sum:%d dev:%s", |
1181 | skb->len, skb->data_len, skb->head, skb->data, | |
1182 | skb_tail_pointer(skb), skb_end_pointer(skb), | |
1183 | skb->csum, skb->dev ? skb->dev->name : "<NULL>"); | |
85b4aa49 RL |
1184 | |
1185 | /* check for FCOE packet type */ | |
1186 | if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) { | |
1875f27e | 1187 | FCOE_NETDEV_DBG(netdev, "Wrong FC type frame"); |
85b4aa49 RL |
1188 | goto err; |
1189 | } | |
1190 | ||
1191 | /* | |
1192 | * Check for minimum frame length, and make sure required FCoE | |
1193 | * and FC headers are pulled into the linear data area. | |
1194 | */ | |
1195 | if (unlikely((skb->len < FCOE_MIN_FRAME) || | |
1875f27e | 1196 | !pskb_may_pull(skb, FCOE_HEADER_LEN))) |
85b4aa49 RL |
1197 | goto err; |
1198 | ||
1199 | skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); | |
1200 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1201 | ||
85b4aa49 | 1202 | fr = fcoe_dev_from_skb(skb); |
1875f27e | 1203 | fr->fr_dev = lport; |
85b4aa49 | 1204 | fr->ptype = ptype; |
5e5e92df | 1205 | |
85b4aa49 | 1206 | /* |
b2f0091f VD |
1207 | * In case the incoming frame's exchange is originated from |
1208 | * the initiator, then received frame's exchange id is ANDed | |
1209 | * with fc_cpu_mask bits to get the same cpu on which exchange | |
1210 | * was originated, otherwise just use the current cpu. | |
85b4aa49 | 1211 | */ |
b2f0091f VD |
1212 | if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) |
1213 | cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; | |
1214 | else | |
1215 | cpu = smp_processor_id(); | |
5e5e92df | 1216 | |
8976f424 | 1217 | fps = &per_cpu(fcoe_percpu, cpu); |
85b4aa49 | 1218 | spin_lock_bh(&fps->fcoe_rx_list.lock); |
8976f424 RL |
1219 | if (unlikely(!fps->thread)) { |
1220 | /* | |
1221 | * The targeted CPU is not ready, let's target | |
1222 | * the first CPU now. For non-SMP systems this | |
1223 | * will check the same CPU twice. | |
1224 | */ | |
1875f27e | 1225 | FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread " |
d5488eb9 RL |
1226 | "ready for incoming skb- using first online " |
1227 | "CPU.\n"); | |
8976f424 RL |
1228 | |
1229 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1230 | cpu = first_cpu(cpu_online_map); | |
1231 | fps = &per_cpu(fcoe_percpu, cpu); | |
1232 | spin_lock_bh(&fps->fcoe_rx_list.lock); | |
1233 | if (!fps->thread) { | |
1234 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1235 | goto err; | |
1236 | } | |
1237 | } | |
1238 | ||
1239 | /* | |
1240 | * We now have a valid CPU that we're targeting for | |
1241 | * this skb. We also have this receive thread locked, | |
1242 | * so we're free to queue skbs into it's queue. | |
1243 | */ | |
85b4aa49 RL |
1244 | __skb_queue_tail(&fps->fcoe_rx_list, skb); |
1245 | if (fps->fcoe_rx_list.qlen == 1) | |
1246 | wake_up_process(fps->thread); | |
1247 | ||
1248 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1249 | ||
1250 | return 0; | |
1251 | err: | |
1875f27e | 1252 | fc_lport_get_stats(lport)->ErrorFrames++; |
85b4aa49 RL |
1253 | |
1254 | err2: | |
1255 | kfree_skb(skb); | |
1256 | return -1; | |
1257 | } | |
85b4aa49 RL |
1258 | |
1259 | /** | |
1875f27e RL |
1260 | * fcoe_start_io() - Start FCoE I/O |
1261 | * @skb: The packet to be transmitted | |
1262 | * | |
1263 | * This routine is called from the net device to start transmitting | |
1264 | * FCoE packets. | |
85b4aa49 RL |
1265 | * |
1266 | * Returns: 0 for success | |
34f42a07 | 1267 | */ |
85b4aa49 RL |
1268 | static inline int fcoe_start_io(struct sk_buff *skb) |
1269 | { | |
18fa11ef | 1270 | struct sk_buff *nskb; |
85b4aa49 RL |
1271 | int rc; |
1272 | ||
18fa11ef CL |
1273 | nskb = skb_clone(skb, GFP_ATOMIC); |
1274 | rc = dev_queue_xmit(nskb); | |
85b4aa49 RL |
1275 | if (rc != 0) |
1276 | return rc; | |
1277 | kfree_skb(skb); | |
1278 | return 0; | |
1279 | } | |
1280 | ||
1281 | /** | |
1875f27e RL |
1282 | * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC |
1283 | * @skb: The packet to be transmitted | |
1284 | * @tlen: The total length of the trailer | |
1285 | * | |
1286 | * This routine allocates a page for frame trailers. The page is re-used if | |
1287 | * there is enough room left on it for the current trailer. If there isn't | |
1288 | * enough buffer left a new page is allocated for the trailer. Reference to | |
1289 | * the page from this function as well as the skbs using the page fragments | |
1290 | * ensure that the page is freed at the appropriate time. | |
85b4aa49 RL |
1291 | * |
1292 | * Returns: 0 for success | |
34f42a07 | 1293 | */ |
85b4aa49 RL |
1294 | static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen) |
1295 | { | |
1296 | struct fcoe_percpu_s *fps; | |
1297 | struct page *page; | |
85b4aa49 | 1298 | |
5e5e92df | 1299 | fps = &get_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1300 | page = fps->crc_eof_page; |
1301 | if (!page) { | |
1302 | page = alloc_page(GFP_ATOMIC); | |
1303 | if (!page) { | |
5e5e92df | 1304 | put_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1305 | return -ENOMEM; |
1306 | } | |
1307 | fps->crc_eof_page = page; | |
8976f424 | 1308 | fps->crc_eof_offset = 0; |
85b4aa49 RL |
1309 | } |
1310 | ||
1311 | get_page(page); | |
1312 | skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page, | |
1313 | fps->crc_eof_offset, tlen); | |
1314 | skb->len += tlen; | |
1315 | skb->data_len += tlen; | |
1316 | skb->truesize += tlen; | |
1317 | fps->crc_eof_offset += sizeof(struct fcoe_crc_eof); | |
1318 | ||
1319 | if (fps->crc_eof_offset >= PAGE_SIZE) { | |
1320 | fps->crc_eof_page = NULL; | |
1321 | fps->crc_eof_offset = 0; | |
1322 | put_page(page); | |
1323 | } | |
5e5e92df | 1324 | put_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1325 | return 0; |
1326 | } | |
1327 | ||
1328 | /** | |
1875f27e RL |
1329 | * fcoe_fc_crc() - Calculates the CRC for a given frame |
1330 | * @fp: The frame to be checksumed | |
85b4aa49 | 1331 | * |
1875f27e RL |
1332 | * This uses crc32() routine to calculate the CRC for a frame |
1333 | * | |
1334 | * Return: The 32 bit CRC value | |
34f42a07 | 1335 | */ |
85b4aa49 RL |
1336 | u32 fcoe_fc_crc(struct fc_frame *fp) |
1337 | { | |
1338 | struct sk_buff *skb = fp_skb(fp); | |
1339 | struct skb_frag_struct *frag; | |
1340 | unsigned char *data; | |
1341 | unsigned long off, len, clen; | |
1342 | u32 crc; | |
1343 | unsigned i; | |
1344 | ||
1345 | crc = crc32(~0, skb->data, skb_headlen(skb)); | |
1346 | ||
1347 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1348 | frag = &skb_shinfo(skb)->frags[i]; | |
1349 | off = frag->page_offset; | |
1350 | len = frag->size; | |
1351 | while (len > 0) { | |
1352 | clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK)); | |
1353 | data = kmap_atomic(frag->page + (off >> PAGE_SHIFT), | |
1354 | KM_SKB_DATA_SOFTIRQ); | |
1355 | crc = crc32(crc, data + (off & ~PAGE_MASK), clen); | |
1356 | kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ); | |
1357 | off += clen; | |
1358 | len -= clen; | |
1359 | } | |
1360 | } | |
1361 | return crc; | |
1362 | } | |
85b4aa49 RL |
1363 | |
1364 | /** | |
1875f27e RL |
1365 | * fcoe_xmit() - Transmit a FCoE frame |
1366 | * @lport: The local port that the frame is to be transmitted for | |
1367 | * @fp: The frame to be transmitted | |
85b4aa49 | 1368 | * |
1875f27e | 1369 | * Return: 0 for success |
34f42a07 | 1370 | */ |
1875f27e | 1371 | int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) |
85b4aa49 | 1372 | { |
4bb6b515 | 1373 | int wlen; |
85b4aa49 RL |
1374 | u32 crc; |
1375 | struct ethhdr *eh; | |
1376 | struct fcoe_crc_eof *cp; | |
1377 | struct sk_buff *skb; | |
1378 | struct fcoe_dev_stats *stats; | |
1379 | struct fc_frame_header *fh; | |
1380 | unsigned int hlen; /* header length implies the version */ | |
1381 | unsigned int tlen; /* trailer length */ | |
1382 | unsigned int elen; /* eth header, may include vlan */ | |
1875f27e | 1383 | struct fcoe_port *port = lport_priv(lport); |
3fe9a0ba | 1384 | struct fcoe_interface *fcoe = port->fcoe; |
85b4aa49 RL |
1385 | u8 sof, eof; |
1386 | struct fcoe_hdr *hp; | |
1387 | ||
1388 | WARN_ON((fr_len(fp) % sizeof(u32)) != 0); | |
1389 | ||
85b4aa49 | 1390 | fh = fc_frame_header_get(fp); |
97c8389d JE |
1391 | skb = fp_skb(fp); |
1392 | wlen = skb->len / FCOE_WORD_TO_BYTE; | |
1393 | ||
1875f27e | 1394 | if (!lport->link_up) { |
3caf02ee | 1395 | kfree_skb(skb); |
97c8389d | 1396 | return 0; |
85b4aa49 RL |
1397 | } |
1398 | ||
97c8389d | 1399 | if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) && |
1875f27e | 1400 | fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb)) |
97c8389d JE |
1401 | return 0; |
1402 | ||
85b4aa49 RL |
1403 | sof = fr_sof(fp); |
1404 | eof = fr_eof(fp); | |
1405 | ||
4e57e1cb | 1406 | elen = sizeof(struct ethhdr); |
85b4aa49 RL |
1407 | hlen = sizeof(struct fcoe_hdr); |
1408 | tlen = sizeof(struct fcoe_crc_eof); | |
1409 | wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; | |
1410 | ||
1411 | /* crc offload */ | |
1875f27e | 1412 | if (likely(lport->crc_offload)) { |
39ca9a06 | 1413 | skb->ip_summed = CHECKSUM_PARTIAL; |
85b4aa49 RL |
1414 | skb->csum_start = skb_headroom(skb); |
1415 | skb->csum_offset = skb->len; | |
1416 | crc = 0; | |
1417 | } else { | |
1418 | skb->ip_summed = CHECKSUM_NONE; | |
1419 | crc = fcoe_fc_crc(fp); | |
1420 | } | |
1421 | ||
014f5c3f | 1422 | /* copy port crc and eof to the skb buff */ |
85b4aa49 RL |
1423 | if (skb_is_nonlinear(skb)) { |
1424 | skb_frag_t *frag; | |
1425 | if (fcoe_get_paged_crc_eof(skb, tlen)) { | |
e9041581 | 1426 | kfree_skb(skb); |
85b4aa49 RL |
1427 | return -ENOMEM; |
1428 | } | |
1429 | frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; | |
1430 | cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ) | |
1431 | + frag->page_offset; | |
1432 | } else { | |
1433 | cp = (struct fcoe_crc_eof *)skb_put(skb, tlen); | |
1434 | } | |
1435 | ||
1436 | memset(cp, 0, sizeof(*cp)); | |
1437 | cp->fcoe_eof = eof; | |
1438 | cp->fcoe_crc32 = cpu_to_le32(~crc); | |
1439 | ||
1440 | if (skb_is_nonlinear(skb)) { | |
1441 | kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ); | |
1442 | cp = NULL; | |
1443 | } | |
1444 | ||
014f5c3f | 1445 | /* adjust skb network/transport offsets to match mac/fcoe/port */ |
85b4aa49 RL |
1446 | skb_push(skb, elen + hlen); |
1447 | skb_reset_mac_header(skb); | |
1448 | skb_reset_network_header(skb); | |
1449 | skb->mac_len = elen; | |
211c738d | 1450 | skb->protocol = htons(ETH_P_FCOE); |
3fe9a0ba | 1451 | skb->dev = fcoe->netdev; |
85b4aa49 RL |
1452 | |
1453 | /* fill up mac and fcoe headers */ | |
1454 | eh = eth_hdr(skb); | |
1455 | eh->h_proto = htons(ETH_P_FCOE); | |
3fe9a0ba | 1456 | if (fcoe->ctlr.map_dest) |
85b4aa49 RL |
1457 | fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id); |
1458 | else | |
1459 | /* insert GW address */ | |
3fe9a0ba | 1460 | memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN); |
85b4aa49 | 1461 | |
3fe9a0ba CL |
1462 | if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN)) |
1463 | memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN); | |
85b4aa49 | 1464 | else |
11b56188 | 1465 | memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); |
85b4aa49 RL |
1466 | |
1467 | hp = (struct fcoe_hdr *)(eh + 1); | |
1468 | memset(hp, 0, sizeof(*hp)); | |
1469 | if (FC_FCOE_VER) | |
1470 | FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); | |
1471 | hp->fcoe_sof = sof; | |
1472 | ||
39ca9a06 | 1473 | /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ |
1875f27e | 1474 | if (lport->seq_offload && fr_max_payload(fp)) { |
39ca9a06 YZ |
1475 | skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; |
1476 | skb_shinfo(skb)->gso_size = fr_max_payload(fp); | |
1477 | } else { | |
1478 | skb_shinfo(skb)->gso_type = 0; | |
1479 | skb_shinfo(skb)->gso_size = 0; | |
1480 | } | |
85b4aa49 | 1481 | /* update tx stats: regardless if LLD fails */ |
1875f27e | 1482 | stats = fc_lport_get_stats(lport); |
582b45bc RL |
1483 | stats->TxFrames++; |
1484 | stats->TxWords += wlen; | |
85b4aa49 RL |
1485 | |
1486 | /* send down to lld */ | |
1875f27e | 1487 | fr_dev(fp) = lport; |
014f5c3f | 1488 | if (port->fcoe_pending_queue.qlen) |
1875f27e | 1489 | fcoe_check_wait_queue(lport, skb); |
4bb6b515 | 1490 | else if (fcoe_start_io(skb)) |
1875f27e | 1491 | fcoe_check_wait_queue(lport, skb); |
85b4aa49 RL |
1492 | |
1493 | return 0; | |
1494 | } | |
85b4aa49 | 1495 | |
e7a51997 | 1496 | /** |
1875f27e RL |
1497 | * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion |
1498 | * @skb: The completed skb (argument required by destructor) | |
e7a51997 JE |
1499 | */ |
1500 | static void fcoe_percpu_flush_done(struct sk_buff *skb) | |
1501 | { | |
1502 | complete(&fcoe_flush_completion); | |
1503 | } | |
1504 | ||
34f42a07 | 1505 | /** |
1875f27e RL |
1506 | * fcoe_percpu_receive_thread() - The per-CPU packet receive thread |
1507 | * @arg: The per-CPU context | |
85b4aa49 RL |
1508 | * |
1509 | * Return: 0 for success | |
85b4aa49 RL |
1510 | */ |
1511 | int fcoe_percpu_receive_thread(void *arg) | |
1512 | { | |
1513 | struct fcoe_percpu_s *p = arg; | |
1514 | u32 fr_len; | |
1875f27e | 1515 | struct fc_lport *lport; |
85b4aa49 RL |
1516 | struct fcoe_rcv_info *fr; |
1517 | struct fcoe_dev_stats *stats; | |
1518 | struct fc_frame_header *fh; | |
1519 | struct sk_buff *skb; | |
1520 | struct fcoe_crc_eof crc_eof; | |
1521 | struct fc_frame *fp; | |
1522 | u8 *mac = NULL; | |
014f5c3f | 1523 | struct fcoe_port *port; |
85b4aa49 RL |
1524 | struct fcoe_hdr *hp; |
1525 | ||
4469c195 | 1526 | set_user_nice(current, -20); |
85b4aa49 RL |
1527 | |
1528 | while (!kthread_should_stop()) { | |
1529 | ||
1530 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1531 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) { | |
1532 | set_current_state(TASK_INTERRUPTIBLE); | |
1533 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1534 | schedule(); | |
1535 | set_current_state(TASK_RUNNING); | |
1536 | if (kthread_should_stop()) | |
1537 | return 0; | |
1538 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1539 | } | |
1540 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1541 | fr = fcoe_dev_from_skb(skb); | |
1875f27e RL |
1542 | lport = fr->fr_dev; |
1543 | if (unlikely(!lport)) { | |
e7a51997 JE |
1544 | if (skb->destructor != fcoe_percpu_flush_done) |
1545 | FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb"); | |
85b4aa49 RL |
1546 | kfree_skb(skb); |
1547 | continue; | |
1548 | } | |
1549 | ||
d5488eb9 RL |
1550 | FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d " |
1551 | "head:%p data:%p tail:%p end:%p sum:%d dev:%s", | |
1552 | skb->len, skb->data_len, | |
1553 | skb->head, skb->data, skb_tail_pointer(skb), | |
1554 | skb_end_pointer(skb), skb->csum, | |
1555 | skb->dev ? skb->dev->name : "<NULL>"); | |
85b4aa49 RL |
1556 | |
1557 | /* | |
1558 | * Save source MAC address before discarding header. | |
1559 | */ | |
1875f27e | 1560 | port = lport_priv(lport); |
85b4aa49 RL |
1561 | if (skb_is_nonlinear(skb)) |
1562 | skb_linearize(skb); /* not ideal */ | |
97c8389d | 1563 | mac = eth_hdr(skb)->h_source; |
85b4aa49 RL |
1564 | |
1565 | /* | |
1566 | * Frame length checks and setting up the header pointers | |
1567 | * was done in fcoe_rcv already. | |
1568 | */ | |
1569 | hp = (struct fcoe_hdr *) skb_network_header(skb); | |
1570 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1571 | ||
1875f27e | 1572 | stats = fc_lport_get_stats(lport); |
85b4aa49 | 1573 | if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { |
582b45bc | 1574 | if (stats->ErrorFrames < 5) |
d5488eb9 | 1575 | printk(KERN_WARNING "fcoe: FCoE version " |
582b45bc RL |
1576 | "mismatch: The frame has " |
1577 | "version %x, but the " | |
1578 | "initiator supports version " | |
1579 | "%x\n", FC_FCOE_DECAPS_VER(hp), | |
1580 | FC_FCOE_VER); | |
1581 | stats->ErrorFrames++; | |
85b4aa49 RL |
1582 | kfree_skb(skb); |
1583 | continue; | |
1584 | } | |
1585 | ||
1586 | skb_pull(skb, sizeof(struct fcoe_hdr)); | |
1587 | fr_len = skb->len - sizeof(struct fcoe_crc_eof); | |
1588 | ||
582b45bc RL |
1589 | stats->RxFrames++; |
1590 | stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; | |
85b4aa49 RL |
1591 | |
1592 | fp = (struct fc_frame *)skb; | |
1593 | fc_frame_init(fp); | |
1875f27e | 1594 | fr_dev(fp) = lport; |
85b4aa49 RL |
1595 | fr_sof(fp) = hp->fcoe_sof; |
1596 | ||
1597 | /* Copy out the CRC and EOF trailer for access */ | |
1598 | if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) { | |
1599 | kfree_skb(skb); | |
1600 | continue; | |
1601 | } | |
1602 | fr_eof(fp) = crc_eof.fcoe_eof; | |
1603 | fr_crc(fp) = crc_eof.fcoe_crc32; | |
1604 | if (pskb_trim(skb, fr_len)) { | |
1605 | kfree_skb(skb); | |
1606 | continue; | |
1607 | } | |
1608 | ||
1609 | /* | |
1610 | * We only check CRC if no offload is available and if it is | |
1611 | * it's solicited data, in which case, the FCP layer would | |
1612 | * check it during the copy. | |
1613 | */ | |
1875f27e RL |
1614 | if (lport->crc_offload && |
1615 | skb->ip_summed == CHECKSUM_UNNECESSARY) | |
85b4aa49 RL |
1616 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; |
1617 | else | |
1618 | fr_flags(fp) |= FCPHF_CRC_UNCHECKED; | |
1619 | ||
1620 | fh = fc_frame_header_get(fp); | |
1621 | if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && | |
1622 | fh->fh_type == FC_TYPE_FCP) { | |
1875f27e | 1623 | fc_exch_recv(lport, fp); |
85b4aa49 RL |
1624 | continue; |
1625 | } | |
1626 | if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) { | |
1627 | if (le32_to_cpu(fr_crc(fp)) != | |
1628 | ~crc32(~0, skb->data, fr_len)) { | |
d5488eb9 | 1629 | if (stats->InvalidCRCCount < 5) |
85b4aa49 RL |
1630 | printk(KERN_WARNING "fcoe: dropping " |
1631 | "frame with CRC error\n"); | |
1632 | stats->InvalidCRCCount++; | |
1633 | stats->ErrorFrames++; | |
1634 | fc_frame_free(fp); | |
1635 | continue; | |
1636 | } | |
1637 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; | |
1638 | } | |
1875f27e | 1639 | fc_exch_recv(lport, fp); |
85b4aa49 RL |
1640 | } |
1641 | return 0; | |
1642 | } | |
1643 | ||
85b4aa49 | 1644 | /** |
1875f27e RL |
1645 | * fcoe_check_wait_queue() - Attempt to clear the transmit backlog |
1646 | * @lport: The local port whose backlog is to be cleared | |
85b4aa49 | 1647 | * |
1875f27e RL |
1648 | * This empties the wait_queue, dequeues the head of the wait_queue queue |
1649 | * and calls fcoe_start_io() for each packet. If all skb have been | |
1650 | * transmitted it returns the qlen. If an error occurs it restores | |
1651 | * wait_queue (to try again later) and returns -1. | |
85b4aa49 | 1652 | * |
1875f27e RL |
1653 | * The wait_queue is used when the skb transmit fails. The failed skb |
1654 | * will go in the wait_queue which will be emptied by the timer function or | |
85b4aa49 | 1655 | * by the next skb transmit. |
34f42a07 | 1656 | */ |
1875f27e | 1657 | static void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb) |
85b4aa49 | 1658 | { |
1875f27e | 1659 | struct fcoe_port *port = lport_priv(lport); |
4bb6b515 | 1660 | int rc; |
85b4aa49 | 1661 | |
014f5c3f | 1662 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
4bb6b515 VD |
1663 | |
1664 | if (skb) | |
014f5c3f | 1665 | __skb_queue_tail(&port->fcoe_pending_queue, skb); |
4bb6b515 | 1666 | |
014f5c3f | 1667 | if (port->fcoe_pending_queue_active) |
c826a314 | 1668 | goto out; |
014f5c3f | 1669 | port->fcoe_pending_queue_active = 1; |
55c8bafb | 1670 | |
014f5c3f | 1671 | while (port->fcoe_pending_queue.qlen) { |
55c8bafb | 1672 | /* keep qlen > 0 until fcoe_start_io succeeds */ |
014f5c3f CL |
1673 | port->fcoe_pending_queue.qlen++; |
1674 | skb = __skb_dequeue(&port->fcoe_pending_queue); | |
55c8bafb | 1675 | |
014f5c3f | 1676 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
55c8bafb | 1677 | rc = fcoe_start_io(skb); |
014f5c3f | 1678 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
55c8bafb CL |
1679 | |
1680 | if (rc) { | |
014f5c3f | 1681 | __skb_queue_head(&port->fcoe_pending_queue, skb); |
55c8bafb | 1682 | /* undo temporary increment above */ |
014f5c3f | 1683 | port->fcoe_pending_queue.qlen--; |
55c8bafb | 1684 | break; |
85b4aa49 | 1685 | } |
55c8bafb | 1686 | /* undo temporary increment above */ |
014f5c3f | 1687 | port->fcoe_pending_queue.qlen--; |
85b4aa49 | 1688 | } |
55c8bafb | 1689 | |
014f5c3f | 1690 | if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH) |
1875f27e | 1691 | lport->qfull = 0; |
014f5c3f CL |
1692 | if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer)) |
1693 | mod_timer(&port->timer, jiffies + 2); | |
1694 | port->fcoe_pending_queue_active = 0; | |
c826a314 | 1695 | out: |
014f5c3f | 1696 | if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH) |
1875f27e | 1697 | lport->qfull = 1; |
014f5c3f | 1698 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
4bb6b515 | 1699 | return; |
85b4aa49 RL |
1700 | } |
1701 | ||
85b4aa49 | 1702 | /** |
1875f27e | 1703 | * fcoe_dev_setup() - Setup the link change notification interface |
34f42a07 | 1704 | */ |
b0d428ad | 1705 | static void fcoe_dev_setup(void) |
85b4aa49 | 1706 | { |
85b4aa49 RL |
1707 | register_netdevice_notifier(&fcoe_notifier); |
1708 | } | |
1709 | ||
1710 | /** | |
1875f27e | 1711 | * fcoe_dev_cleanup() - Cleanup the link change notification interface |
34f42a07 | 1712 | */ |
85b4aa49 RL |
1713 | static void fcoe_dev_cleanup(void) |
1714 | { | |
1715 | unregister_netdevice_notifier(&fcoe_notifier); | |
1716 | } | |
1717 | ||
1718 | /** | |
1875f27e RL |
1719 | * fcoe_device_notification() - Handler for net device events |
1720 | * @notifier: The context of the notification | |
1721 | * @event: The type of event | |
1722 | * @ptr: The net device that the event was on | |
85b4aa49 | 1723 | * |
1875f27e | 1724 | * This function is called by the Ethernet driver in case of link change event. |
85b4aa49 RL |
1725 | * |
1726 | * Returns: 0 for success | |
34f42a07 | 1727 | */ |
85b4aa49 RL |
1728 | static int fcoe_device_notification(struct notifier_block *notifier, |
1729 | ulong event, void *ptr) | |
1730 | { | |
1875f27e | 1731 | struct fc_lport *lport = NULL; |
1d1b88dc | 1732 | struct net_device *netdev = ptr; |
014f5c3f | 1733 | struct fcoe_interface *fcoe; |
2e70e241 | 1734 | struct fcoe_port *port; |
85b4aa49 | 1735 | struct fcoe_dev_stats *stats; |
97c8389d | 1736 | u32 link_possible = 1; |
85b4aa49 RL |
1737 | u32 mfs; |
1738 | int rc = NOTIFY_OK; | |
1739 | ||
014f5c3f | 1740 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
25024989 | 1741 | if (fcoe->netdev == netdev) { |
1875f27e | 1742 | lport = fcoe->ctlr.lp; |
85b4aa49 RL |
1743 | break; |
1744 | } | |
1745 | } | |
1875f27e | 1746 | if (!lport) { |
85b4aa49 RL |
1747 | rc = NOTIFY_DONE; |
1748 | goto out; | |
1749 | } | |
1750 | ||
85b4aa49 RL |
1751 | switch (event) { |
1752 | case NETDEV_DOWN: | |
1753 | case NETDEV_GOING_DOWN: | |
97c8389d | 1754 | link_possible = 0; |
85b4aa49 RL |
1755 | break; |
1756 | case NETDEV_UP: | |
1757 | case NETDEV_CHANGE: | |
85b4aa49 RL |
1758 | break; |
1759 | case NETDEV_CHANGEMTU: | |
7221d7e5 YZ |
1760 | if (netdev->features & NETIF_F_FCOE_MTU) |
1761 | break; | |
1d1b88dc VD |
1762 | mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + |
1763 | sizeof(struct fcoe_crc_eof)); | |
85b4aa49 | 1764 | if (mfs >= FC_MIN_MAX_FRAME) |
1875f27e | 1765 | fc_set_mfs(lport, mfs); |
85b4aa49 RL |
1766 | break; |
1767 | case NETDEV_REGISTER: | |
1768 | break; | |
2e70e241 CL |
1769 | case NETDEV_UNREGISTER: |
1770 | list_del(&fcoe->list); | |
1771 | port = lport_priv(fcoe->ctlr.lp); | |
1772 | fcoe_interface_cleanup(fcoe); | |
1773 | schedule_work(&port->destroy_work); | |
1774 | goto out; | |
1775 | break; | |
85b4aa49 | 1776 | default: |
1d1b88dc | 1777 | FCOE_NETDEV_DBG(netdev, "Unknown event %ld " |
d5488eb9 | 1778 | "from netdev netlink\n", event); |
85b4aa49 | 1779 | } |
1875f27e | 1780 | if (link_possible && !fcoe_link_ok(lport)) |
3fe9a0ba CL |
1781 | fcoe_ctlr_link_up(&fcoe->ctlr); |
1782 | else if (fcoe_ctlr_link_down(&fcoe->ctlr)) { | |
1875f27e | 1783 | stats = fc_lport_get_stats(lport); |
97c8389d | 1784 | stats->LinkFailureCount++; |
1875f27e | 1785 | fcoe_clean_pending_queue(lport); |
85b4aa49 RL |
1786 | } |
1787 | out: | |
1788 | return rc; | |
1789 | } | |
1790 | ||
1791 | /** | |
1875f27e RL |
1792 | * fcoe_if_to_netdev() - Parse a name buffer to get a net device |
1793 | * @buffer: The name of the net device | |
85b4aa49 | 1794 | * |
1875f27e | 1795 | * Returns: NULL or a ptr to net_device |
34f42a07 | 1796 | */ |
85b4aa49 RL |
1797 | static struct net_device *fcoe_if_to_netdev(const char *buffer) |
1798 | { | |
1799 | char *cp; | |
1800 | char ifname[IFNAMSIZ + 2]; | |
1801 | ||
1802 | if (buffer) { | |
1803 | strlcpy(ifname, buffer, IFNAMSIZ); | |
1804 | cp = ifname + strlen(ifname); | |
1805 | while (--cp >= ifname && *cp == '\n') | |
1806 | *cp = '\0'; | |
1807 | return dev_get_by_name(&init_net, ifname); | |
1808 | } | |
1809 | return NULL; | |
1810 | } | |
1811 | ||
85b4aa49 | 1812 | /** |
1875f27e RL |
1813 | * fcoe_destroy() - Destroy a FCoE interface |
1814 | * @buffer: The name of the Ethernet interface to be destroyed | |
1815 | * @kp: The associated kernel parameter | |
1816 | * | |
1817 | * Called from sysfs. | |
85b4aa49 RL |
1818 | * |
1819 | * Returns: 0 for success | |
34f42a07 | 1820 | */ |
85b4aa49 RL |
1821 | static int fcoe_destroy(const char *buffer, struct kernel_param *kp) |
1822 | { | |
030f4e00 | 1823 | struct fcoe_interface *fcoe; |
2e70e241 | 1824 | struct net_device *netdev; |
8eca355f | 1825 | int rc = 0; |
85b4aa49 | 1826 | |
dfc1d0fe CL |
1827 | mutex_lock(&fcoe_config_mutex); |
1828 | #ifdef CONFIG_FCOE_MODULE | |
1829 | /* | |
1830 | * Make sure the module has been initialized, and is not about to be | |
1831 | * removed. Module paramter sysfs files are writable before the | |
1832 | * module_init function is called and after module_exit. | |
1833 | */ | |
1834 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
1835 | rc = -ENODEV; | |
1836 | goto out_nodev; | |
1837 | } | |
1838 | #endif | |
1839 | ||
85b4aa49 RL |
1840 | netdev = fcoe_if_to_netdev(buffer); |
1841 | if (!netdev) { | |
1842 | rc = -ENODEV; | |
1843 | goto out_nodev; | |
1844 | } | |
2e70e241 | 1845 | |
090eb6c4 | 1846 | rtnl_lock(); |
2e70e241 CL |
1847 | fcoe = fcoe_hostlist_lookup_port(netdev); |
1848 | if (!fcoe) { | |
090eb6c4 | 1849 | rtnl_unlock(); |
85b4aa49 RL |
1850 | rc = -ENODEV; |
1851 | goto out_putdev; | |
1852 | } | |
2e70e241 | 1853 | list_del(&fcoe->list); |
2e70e241 CL |
1854 | fcoe_interface_cleanup(fcoe); |
1855 | rtnl_unlock(); | |
1856 | fcoe_if_destroy(fcoe->ctlr.lp); | |
85b4aa49 RL |
1857 | out_putdev: |
1858 | dev_put(netdev); | |
1859 | out_nodev: | |
dfc1d0fe | 1860 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 RL |
1861 | return rc; |
1862 | } | |
1863 | ||
1875f27e RL |
1864 | /** |
1865 | * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context | |
1866 | * @work: Handle to the FCoE port to be destroyed | |
1867 | */ | |
2e70e241 CL |
1868 | static void fcoe_destroy_work(struct work_struct *work) |
1869 | { | |
1870 | struct fcoe_port *port; | |
1871 | ||
1872 | port = container_of(work, struct fcoe_port, destroy_work); | |
1873 | mutex_lock(&fcoe_config_mutex); | |
1874 | fcoe_if_destroy(port->lport); | |
1875 | mutex_unlock(&fcoe_config_mutex); | |
1876 | } | |
1877 | ||
85b4aa49 | 1878 | /** |
1875f27e RL |
1879 | * fcoe_create() - Create a fcoe interface |
1880 | * @buffer: The name of the Ethernet interface to create on | |
1881 | * @kp: The associated kernel param | |
1882 | * | |
1883 | * Called from sysfs. | |
85b4aa49 RL |
1884 | * |
1885 | * Returns: 0 for success | |
34f42a07 | 1886 | */ |
85b4aa49 RL |
1887 | static int fcoe_create(const char *buffer, struct kernel_param *kp) |
1888 | { | |
1889 | int rc; | |
030f4e00 | 1890 | struct fcoe_interface *fcoe; |
af7f85d9 | 1891 | struct fc_lport *lport; |
85b4aa49 RL |
1892 | struct net_device *netdev; |
1893 | ||
dfc1d0fe CL |
1894 | mutex_lock(&fcoe_config_mutex); |
1895 | #ifdef CONFIG_FCOE_MODULE | |
1896 | /* | |
1897 | * Make sure the module has been initialized, and is not about to be | |
1898 | * removed. Module paramter sysfs files are writable before the | |
1899 | * module_init function is called and after module_exit. | |
1900 | */ | |
1901 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
1902 | rc = -ENODEV; | |
1903 | goto out_nodev; | |
1904 | } | |
1905 | #endif | |
1906 | ||
2e70e241 | 1907 | rtnl_lock(); |
85b4aa49 RL |
1908 | netdev = fcoe_if_to_netdev(buffer); |
1909 | if (!netdev) { | |
1910 | rc = -ENODEV; | |
1911 | goto out_nodev; | |
1912 | } | |
2e70e241 | 1913 | |
85b4aa49 RL |
1914 | /* look for existing lport */ |
1915 | if (fcoe_hostlist_lookup(netdev)) { | |
1916 | rc = -EEXIST; | |
1917 | goto out_putdev; | |
1918 | } | |
85b4aa49 | 1919 | |
030f4e00 CL |
1920 | fcoe = fcoe_interface_create(netdev); |
1921 | if (!fcoe) { | |
1922 | rc = -ENOMEM; | |
1923 | goto out_putdev; | |
1924 | } | |
1925 | ||
9a05753b | 1926 | lport = fcoe_if_create(fcoe, &netdev->dev, 0); |
af7f85d9 | 1927 | if (IS_ERR(lport)) { |
d5488eb9 | 1928 | printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", |
85b4aa49 | 1929 | netdev->name); |
85b4aa49 | 1930 | rc = -EIO; |
2e70e241 | 1931 | fcoe_interface_cleanup(fcoe); |
030f4e00 | 1932 | goto out_free; |
85b4aa49 | 1933 | } |
030f4e00 | 1934 | |
54b649f8 CL |
1935 | /* Make this the "master" N_Port */ |
1936 | fcoe->ctlr.lp = lport; | |
1937 | ||
c863df33 CL |
1938 | /* add to lports list */ |
1939 | fcoe_hostlist_add(lport); | |
1940 | ||
54b649f8 CL |
1941 | /* start FIP Discovery and FLOGI */ |
1942 | lport->boot_time = jiffies; | |
1943 | fc_fabric_login(lport); | |
1944 | if (!fcoe_link_ok(lport)) | |
1945 | fcoe_ctlr_link_up(&fcoe->ctlr); | |
030f4e00 | 1946 | |
54b649f8 | 1947 | rc = 0; |
030f4e00 | 1948 | out_free: |
54b649f8 CL |
1949 | /* |
1950 | * Release from init in fcoe_interface_create(), on success lport | |
1951 | * should be holding a reference taken in fcoe_if_create(). | |
1952 | */ | |
030f4e00 | 1953 | fcoe_interface_put(fcoe); |
85b4aa49 RL |
1954 | out_putdev: |
1955 | dev_put(netdev); | |
1956 | out_nodev: | |
2e70e241 | 1957 | rtnl_unlock(); |
dfc1d0fe | 1958 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 RL |
1959 | return rc; |
1960 | } | |
1961 | ||
34f42a07 | 1962 | /** |
1875f27e RL |
1963 | * fcoe_link_ok() - Check if the link is OK for a local port |
1964 | * @lport: The local port to check link on | |
85b4aa49 RL |
1965 | * |
1966 | * Any permanently-disqualifying conditions have been previously checked. | |
1967 | * This also updates the speed setting, which may change with link for 100/1000. | |
1968 | * | |
1969 | * This function should probably be checking for PAUSE support at some point | |
1970 | * in the future. Currently Per-priority-pause is not determinable using | |
1971 | * ethtool, so we shouldn't be restrictive until that problem is resolved. | |
1972 | * | |
1973 | * Returns: 0 if link is OK for use by FCoE. | |
1974 | * | |
1975 | */ | |
1875f27e | 1976 | int fcoe_link_ok(struct fc_lport *lport) |
85b4aa49 | 1977 | { |
1875f27e RL |
1978 | struct fcoe_port *port = lport_priv(lport); |
1979 | struct net_device *netdev = port->fcoe->netdev; | |
85b4aa49 | 1980 | struct ethtool_cmd ecmd = { ETHTOOL_GSET }; |
85b4aa49 | 1981 | |
1875f27e RL |
1982 | if ((netdev->flags & IFF_UP) && netif_carrier_ok(netdev) && |
1983 | (!dev_ethtool_get_settings(netdev, &ecmd))) { | |
1984 | lport->link_supported_speeds &= | |
2f718d64 YZ |
1985 | ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT); |
1986 | if (ecmd.supported & (SUPPORTED_1000baseT_Half | | |
1987 | SUPPORTED_1000baseT_Full)) | |
1875f27e | 1988 | lport->link_supported_speeds |= FC_PORTSPEED_1GBIT; |
2f718d64 | 1989 | if (ecmd.supported & SUPPORTED_10000baseT_Full) |
1875f27e | 1990 | lport->link_supported_speeds |= |
2f718d64 YZ |
1991 | FC_PORTSPEED_10GBIT; |
1992 | if (ecmd.speed == SPEED_1000) | |
1875f27e | 1993 | lport->link_speed = FC_PORTSPEED_1GBIT; |
2f718d64 | 1994 | if (ecmd.speed == SPEED_10000) |
1875f27e | 1995 | lport->link_speed = FC_PORTSPEED_10GBIT; |
85b4aa49 | 1996 | |
2f718d64 YZ |
1997 | return 0; |
1998 | } | |
1999 | return -1; | |
85b4aa49 | 2000 | } |
85b4aa49 | 2001 | |
34f42a07 | 2002 | /** |
1875f27e RL |
2003 | * fcoe_percpu_clean() - Clear all pending skbs for an local port |
2004 | * @lport: The local port whose skbs are to be cleared | |
e7a51997 JE |
2005 | * |
2006 | * Must be called with fcoe_create_mutex held to single-thread completion. | |
2007 | * | |
2008 | * This flushes the pending skbs by adding a new skb to each queue and | |
2009 | * waiting until they are all freed. This assures us that not only are | |
2010 | * there no packets that will be handled by the lport, but also that any | |
2011 | * threads already handling packet have returned. | |
85b4aa49 | 2012 | */ |
1875f27e | 2013 | void fcoe_percpu_clean(struct fc_lport *lport) |
85b4aa49 | 2014 | { |
85b4aa49 RL |
2015 | struct fcoe_percpu_s *pp; |
2016 | struct fcoe_rcv_info *fr; | |
2017 | struct sk_buff_head *list; | |
2018 | struct sk_buff *skb, *next; | |
2019 | struct sk_buff *head; | |
5e5e92df | 2020 | unsigned int cpu; |
85b4aa49 | 2021 | |
5e5e92df RL |
2022 | for_each_possible_cpu(cpu) { |
2023 | pp = &per_cpu(fcoe_percpu, cpu); | |
2024 | spin_lock_bh(&pp->fcoe_rx_list.lock); | |
2025 | list = &pp->fcoe_rx_list; | |
2026 | head = list->next; | |
2027 | for (skb = head; skb != (struct sk_buff *)list; | |
2028 | skb = next) { | |
2029 | next = skb->next; | |
2030 | fr = fcoe_dev_from_skb(skb); | |
1875f27e | 2031 | if (fr->fr_dev == lport) { |
5e5e92df RL |
2032 | __skb_unlink(skb, list); |
2033 | kfree_skb(skb); | |
85b4aa49 | 2034 | } |
85b4aa49 | 2035 | } |
e7a51997 JE |
2036 | |
2037 | if (!pp->thread || !cpu_online(cpu)) { | |
2038 | spin_unlock_bh(&pp->fcoe_rx_list.lock); | |
2039 | continue; | |
2040 | } | |
2041 | ||
2042 | skb = dev_alloc_skb(0); | |
2043 | if (!skb) { | |
2044 | spin_unlock_bh(&pp->fcoe_rx_list.lock); | |
2045 | continue; | |
2046 | } | |
2047 | skb->destructor = fcoe_percpu_flush_done; | |
2048 | ||
2049 | __skb_queue_tail(&pp->fcoe_rx_list, skb); | |
2050 | if (pp->fcoe_rx_list.qlen == 1) | |
2051 | wake_up_process(pp->thread); | |
5e5e92df | 2052 | spin_unlock_bh(&pp->fcoe_rx_list.lock); |
e7a51997 JE |
2053 | |
2054 | wait_for_completion(&fcoe_flush_completion); | |
85b4aa49 RL |
2055 | } |
2056 | } | |
85b4aa49 RL |
2057 | |
2058 | /** | |
34f42a07 | 2059 | * fcoe_clean_pending_queue() - Dequeue a skb and free it |
1875f27e | 2060 | * @lport: The local port to dequeue a skb on |
34f42a07 | 2061 | */ |
1875f27e | 2062 | void fcoe_clean_pending_queue(struct fc_lport *lport) |
85b4aa49 | 2063 | { |
1875f27e | 2064 | struct fcoe_port *port = lport_priv(lport); |
85b4aa49 RL |
2065 | struct sk_buff *skb; |
2066 | ||
014f5c3f CL |
2067 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
2068 | while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) { | |
2069 | spin_unlock_bh(&port->fcoe_pending_queue.lock); | |
85b4aa49 | 2070 | kfree_skb(skb); |
014f5c3f | 2071 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
85b4aa49 | 2072 | } |
014f5c3f | 2073 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
85b4aa49 | 2074 | } |
85b4aa49 | 2075 | |
34f42a07 | 2076 | /** |
1875f27e RL |
2077 | * fcoe_reset() - Reset a local port |
2078 | * @shost: The SCSI host associated with the local port to be reset | |
85b4aa49 | 2079 | * |
1875f27e | 2080 | * Returns: Always 0 (return value required by FC transport template) |
85b4aa49 RL |
2081 | */ |
2082 | int fcoe_reset(struct Scsi_Host *shost) | |
2083 | { | |
2084 | struct fc_lport *lport = shost_priv(shost); | |
2085 | fc_lport_reset(lport); | |
2086 | return 0; | |
2087 | } | |
85b4aa49 | 2088 | |
34f42a07 | 2089 | /** |
1875f27e RL |
2090 | * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device |
2091 | * @netdev: The net device used as a key | |
85b4aa49 | 2092 | * |
1875f27e RL |
2093 | * Locking: Must be called with the RNL mutex held. |
2094 | * | |
2095 | * Returns: NULL or the FCoE interface | |
85b4aa49 | 2096 | */ |
014f5c3f | 2097 | static struct fcoe_interface * |
1875f27e | 2098 | fcoe_hostlist_lookup_port(const struct net_device *netdev) |
85b4aa49 | 2099 | { |
014f5c3f | 2100 | struct fcoe_interface *fcoe; |
85b4aa49 | 2101 | |
014f5c3f | 2102 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
1875f27e | 2103 | if (fcoe->netdev == netdev) |
014f5c3f | 2104 | return fcoe; |
85b4aa49 | 2105 | } |
85b4aa49 RL |
2106 | return NULL; |
2107 | } | |
2108 | ||
34f42a07 | 2109 | /** |
1875f27e RL |
2110 | * fcoe_hostlist_lookup() - Find the local port associated with a |
2111 | * given net device | |
2112 | * @netdev: The netdevice used as a key | |
85b4aa49 | 2113 | * |
1875f27e RL |
2114 | * Locking: Must be called with the RTNL mutex held |
2115 | * | |
2116 | * Returns: NULL or the local port | |
85b4aa49 | 2117 | */ |
090eb6c4 | 2118 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) |
85b4aa49 | 2119 | { |
014f5c3f | 2120 | struct fcoe_interface *fcoe; |
85b4aa49 | 2121 | |
014f5c3f | 2122 | fcoe = fcoe_hostlist_lookup_port(netdev); |
3fe9a0ba | 2123 | return (fcoe) ? fcoe->ctlr.lp : NULL; |
85b4aa49 | 2124 | } |
85b4aa49 | 2125 | |
34f42a07 | 2126 | /** |
1875f27e RL |
2127 | * fcoe_hostlist_add() - Add the FCoE interface identified by a local |
2128 | * port to the hostlist | |
2129 | * @lport: The local port that identifies the FCoE interface to be added | |
85b4aa49 | 2130 | * |
090eb6c4 | 2131 | * Locking: must be called with the RTNL mutex held |
1875f27e RL |
2132 | * |
2133 | * Returns: 0 for success | |
85b4aa49 | 2134 | */ |
090eb6c4 | 2135 | static int fcoe_hostlist_add(const struct fc_lport *lport) |
85b4aa49 | 2136 | { |
014f5c3f CL |
2137 | struct fcoe_interface *fcoe; |
2138 | struct fcoe_port *port; | |
2139 | ||
2140 | fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); | |
2141 | if (!fcoe) { | |
2142 | port = lport_priv(lport); | |
2143 | fcoe = port->fcoe; | |
2144 | list_add_tail(&fcoe->list, &fcoe_hostlist); | |
85b4aa49 RL |
2145 | } |
2146 | return 0; | |
2147 | } | |
85b4aa49 | 2148 | |
85b4aa49 | 2149 | /** |
1875f27e | 2150 | * fcoe_init() - Initialize fcoe.ko |
85b4aa49 | 2151 | * |
1875f27e | 2152 | * Returns: 0 on success, or a negative value on failure |
34f42a07 | 2153 | */ |
85b4aa49 RL |
2154 | static int __init fcoe_init(void) |
2155 | { | |
1875f27e | 2156 | struct fcoe_percpu_s *p; |
38eccabd | 2157 | unsigned int cpu; |
8976f424 | 2158 | int rc = 0; |
85b4aa49 | 2159 | |
dfc1d0fe CL |
2160 | mutex_lock(&fcoe_config_mutex); |
2161 | ||
38eccabd | 2162 | for_each_possible_cpu(cpu) { |
5e5e92df | 2163 | p = &per_cpu(fcoe_percpu, cpu); |
38eccabd RL |
2164 | skb_queue_head_init(&p->fcoe_rx_list); |
2165 | } | |
2166 | ||
8976f424 RL |
2167 | for_each_online_cpu(cpu) |
2168 | fcoe_percpu_thread_create(cpu); | |
85b4aa49 | 2169 | |
8976f424 RL |
2170 | /* Initialize per CPU interrupt thread */ |
2171 | rc = register_hotcpu_notifier(&fcoe_cpu_notifier); | |
2172 | if (rc) | |
2173 | goto out_free; | |
85b4aa49 | 2174 | |
8976f424 | 2175 | /* Setup link change notification */ |
85b4aa49 RL |
2176 | fcoe_dev_setup(); |
2177 | ||
5892c32f CL |
2178 | rc = fcoe_if_init(); |
2179 | if (rc) | |
2180 | goto out_free; | |
85b4aa49 | 2181 | |
dfc1d0fe | 2182 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 | 2183 | return 0; |
8976f424 RL |
2184 | |
2185 | out_free: | |
2186 | for_each_online_cpu(cpu) { | |
2187 | fcoe_percpu_thread_destroy(cpu); | |
2188 | } | |
dfc1d0fe | 2189 | mutex_unlock(&fcoe_config_mutex); |
8976f424 | 2190 | return rc; |
85b4aa49 RL |
2191 | } |
2192 | module_init(fcoe_init); | |
2193 | ||
2194 | /** | |
1875f27e | 2195 | * fcoe_exit() - Clean up fcoe.ko |
85b4aa49 | 2196 | * |
1875f27e | 2197 | * Returns: 0 on success or a negative value on failure |
34f42a07 | 2198 | */ |
85b4aa49 RL |
2199 | static void __exit fcoe_exit(void) |
2200 | { | |
014f5c3f | 2201 | struct fcoe_interface *fcoe, *tmp; |
2e70e241 | 2202 | struct fcoe_port *port; |
1875f27e | 2203 | unsigned int cpu; |
85b4aa49 | 2204 | |
dfc1d0fe CL |
2205 | mutex_lock(&fcoe_config_mutex); |
2206 | ||
85b4aa49 RL |
2207 | fcoe_dev_cleanup(); |
2208 | ||
5919a595 | 2209 | /* releases the associated fcoe hosts */ |
090eb6c4 CL |
2210 | rtnl_lock(); |
2211 | list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { | |
c863df33 | 2212 | list_del(&fcoe->list); |
2e70e241 | 2213 | port = lport_priv(fcoe->ctlr.lp); |
2e70e241 | 2214 | fcoe_interface_cleanup(fcoe); |
2e70e241 | 2215 | schedule_work(&port->destroy_work); |
c863df33 | 2216 | } |
090eb6c4 | 2217 | rtnl_unlock(); |
85b4aa49 | 2218 | |
8976f424 RL |
2219 | unregister_hotcpu_notifier(&fcoe_cpu_notifier); |
2220 | ||
014f5c3f | 2221 | for_each_online_cpu(cpu) |
8976f424 | 2222 | fcoe_percpu_thread_destroy(cpu); |
85b4aa49 | 2223 | |
dfc1d0fe | 2224 | mutex_unlock(&fcoe_config_mutex); |
2e70e241 CL |
2225 | |
2226 | /* flush any asyncronous interface destroys, | |
2227 | * this should happen after the netdev notifier is unregistered */ | |
2228 | flush_scheduled_work(); | |
9a05753b CL |
2229 | /* That will flush out all the N_Ports on the hostlist, but now we |
2230 | * may have NPIV VN_Ports scheduled for destruction */ | |
2231 | flush_scheduled_work(); | |
2e70e241 CL |
2232 | |
2233 | /* detach from scsi transport | |
2234 | * must happen after all destroys are done, therefor after the flush */ | |
2235 | fcoe_if_exit(); | |
85b4aa49 RL |
2236 | } |
2237 | module_exit(fcoe_exit); | |
11b56188 CL |
2238 | |
2239 | /** | |
2240 | * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler | |
2241 | * @seq: active sequence in the FLOGI or FDISC exchange | |
2242 | * @fp: response frame, or error encoded in a pointer (timeout) | |
2243 | * @arg: pointer the the fcoe_ctlr structure | |
2244 | * | |
2245 | * This handles MAC address managment for FCoE, then passes control on to | |
2246 | * the libfc FLOGI response handler. | |
2247 | */ | |
2248 | static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) | |
2249 | { | |
2250 | struct fcoe_ctlr *fip = arg; | |
2251 | struct fc_exch *exch = fc_seq_exch(seq); | |
2252 | struct fc_lport *lport = exch->lp; | |
2253 | u8 *mac; | |
2254 | ||
2255 | if (IS_ERR(fp)) | |
2256 | goto done; | |
2257 | ||
2258 | mac = fr_cb(fp)->granted_mac; | |
2259 | if (is_zero_ether_addr(mac)) { | |
2260 | /* pre-FIP */ | |
386309ce | 2261 | if (fcoe_ctlr_recv_flogi(fip, lport, fp)) { |
11b56188 CL |
2262 | fc_frame_free(fp); |
2263 | return; | |
2264 | } | |
11b56188 | 2265 | } |
386309ce | 2266 | fcoe_update_src_mac(lport, mac); |
11b56188 CL |
2267 | done: |
2268 | fc_lport_flogi_resp(seq, fp, lport); | |
2269 | } | |
2270 | ||
2271 | /** | |
2272 | * fcoe_logo_resp() - FCoE specific LOGO response handler | |
2273 | * @seq: active sequence in the LOGO exchange | |
2274 | * @fp: response frame, or error encoded in a pointer (timeout) | |
2275 | * @arg: pointer the the fcoe_ctlr structure | |
2276 | * | |
2277 | * This handles MAC address managment for FCoE, then passes control on to | |
2278 | * the libfc LOGO response handler. | |
2279 | */ | |
2280 | static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) | |
2281 | { | |
386309ce | 2282 | struct fc_lport *lport = arg; |
11b56188 CL |
2283 | static u8 zero_mac[ETH_ALEN] = { 0 }; |
2284 | ||
2285 | if (!IS_ERR(fp)) | |
386309ce | 2286 | fcoe_update_src_mac(lport, zero_mac); |
11b56188 CL |
2287 | fc_lport_logo_resp(seq, fp, lport); |
2288 | } | |
2289 | ||
2290 | /** | |
2291 | * fcoe_elsct_send - FCoE specific ELS handler | |
2292 | * | |
2293 | * This does special case handling of FIP encapsualted ELS exchanges for FCoE, | |
2294 | * using FCoE specific response handlers and passing the FIP controller as | |
2295 | * the argument (the lport is still available from the exchange). | |
2296 | * | |
2297 | * Most of the work here is just handed off to the libfc routine. | |
2298 | */ | |
1875f27e RL |
2299 | static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, |
2300 | struct fc_frame *fp, unsigned int op, | |
2301 | void (*resp)(struct fc_seq *, | |
2302 | struct fc_frame *, | |
2303 | void *), | |
2304 | void *arg, u32 timeout) | |
11b56188 CL |
2305 | { |
2306 | struct fcoe_port *port = lport_priv(lport); | |
2307 | struct fcoe_interface *fcoe = port->fcoe; | |
2308 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
2309 | struct fc_frame_header *fh = fc_frame_header_get(fp); | |
2310 | ||
2311 | switch (op) { | |
2312 | case ELS_FLOGI: | |
2313 | case ELS_FDISC: | |
2314 | return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, | |
2315 | fip, timeout); | |
2316 | case ELS_LOGO: | |
2317 | /* only hook onto fabric logouts, not port logouts */ | |
2318 | if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) | |
2319 | break; | |
2320 | return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, | |
386309ce | 2321 | lport, timeout); |
11b56188 CL |
2322 | } |
2323 | return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); | |
2324 | } | |
2325 | ||
9a05753b CL |
2326 | /** |
2327 | * fcoe_vport_create() - create an fc_host/scsi_host for a vport | |
2328 | * @vport: fc_vport object to create a new fc_host for | |
2329 | * @disabled: start the new fc_host in a disabled state by default? | |
2330 | * | |
2331 | * Returns: 0 for success | |
2332 | */ | |
2333 | static int fcoe_vport_create(struct fc_vport *vport, bool disabled) | |
2334 | { | |
2335 | struct Scsi_Host *shost = vport_to_shost(vport); | |
2336 | struct fc_lport *n_port = shost_priv(shost); | |
2337 | struct fcoe_port *port = lport_priv(n_port); | |
2338 | struct fcoe_interface *fcoe = port->fcoe; | |
2339 | struct net_device *netdev = fcoe->netdev; | |
2340 | struct fc_lport *vn_port; | |
2341 | ||
2342 | mutex_lock(&fcoe_config_mutex); | |
2343 | vn_port = fcoe_if_create(fcoe, &vport->dev, 1); | |
2344 | mutex_unlock(&fcoe_config_mutex); | |
2345 | ||
2346 | if (IS_ERR(vn_port)) { | |
2347 | printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", | |
2348 | netdev->name); | |
2349 | return -EIO; | |
2350 | } | |
2351 | ||
2352 | if (disabled) { | |
2353 | fc_vport_set_state(vport, FC_VPORT_DISABLED); | |
2354 | } else { | |
2355 | vn_port->boot_time = jiffies; | |
2356 | fc_fabric_login(vn_port); | |
2357 | fc_vport_setlink(vn_port); | |
2358 | } | |
2359 | return 0; | |
2360 | } | |
2361 | ||
2362 | /** | |
2363 | * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport | |
2364 | * @vport: fc_vport object that is being destroyed | |
2365 | * | |
2366 | * Returns: 0 for success | |
2367 | */ | |
2368 | static int fcoe_vport_destroy(struct fc_vport *vport) | |
2369 | { | |
2370 | struct Scsi_Host *shost = vport_to_shost(vport); | |
2371 | struct fc_lport *n_port = shost_priv(shost); | |
2372 | struct fc_lport *vn_port = vport->dd_data; | |
2373 | struct fcoe_port *port = lport_priv(vn_port); | |
2374 | ||
2375 | mutex_lock(&n_port->lp_mutex); | |
2376 | list_del(&vn_port->list); | |
2377 | mutex_unlock(&n_port->lp_mutex); | |
2378 | schedule_work(&port->destroy_work); | |
2379 | return 0; | |
2380 | } | |
2381 | ||
2382 | /** | |
2383 | * fcoe_vport_disable() - change vport state | |
2384 | * @vport: vport to bring online/offline | |
2385 | * @disable: should the vport be disabled? | |
2386 | */ | |
2387 | static int fcoe_vport_disable(struct fc_vport *vport, bool disable) | |
2388 | { | |
2389 | struct fc_lport *lport = vport->dd_data; | |
2390 | ||
2391 | if (disable) { | |
2392 | fc_vport_set_state(vport, FC_VPORT_DISABLED); | |
2393 | fc_fabric_logoff(lport); | |
2394 | } else { | |
2395 | lport->boot_time = jiffies; | |
2396 | fc_fabric_login(lport); | |
2397 | fc_vport_setlink(lport); | |
2398 | } | |
2399 | ||
2400 | return 0; | |
2401 | } | |
2402 | ||
dc8596d3 CL |
2403 | /** |
2404 | * fcoe_vport_set_symbolic_name() - append vport string to symbolic name | |
2405 | * @vport: fc_vport with a new symbolic name string | |
2406 | * | |
2407 | * After generating a new symbolic name string, a new RSPN_ID request is | |
2408 | * sent to the name server. There is no response handler, so if it fails | |
2409 | * for some reason it will not be retried. | |
2410 | */ | |
2411 | static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) | |
2412 | { | |
2413 | struct fc_lport *lport = vport->dd_data; | |
2414 | struct fc_frame *fp; | |
2415 | size_t len; | |
2416 | ||
2417 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, | |
2418 | "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, | |
2419 | fcoe_netdev(lport)->name, vport->symbolic_name); | |
2420 | ||
2421 | if (lport->state != LPORT_ST_READY) | |
2422 | return; | |
2423 | ||
2424 | len = strnlen(fc_host_symbolic_name(lport->host), 255); | |
2425 | fp = fc_frame_alloc(lport, | |
2426 | sizeof(struct fc_ct_hdr) + | |
2427 | sizeof(struct fc_ns_rspn) + len); | |
2428 | if (!fp) | |
2429 | return; | |
2430 | lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, | |
2431 | NULL, NULL, lport->e_d_tov); | |
2432 | } |