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85b4aa49 | 1 | /* |
af7f85d9 | 2 | * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved. |
85b4aa49 RL |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | * | |
17 | * Maintained at www.Open-FCoE.org | |
18 | */ | |
19 | ||
20 | #include <linux/module.h> | |
21 | #include <linux/version.h> | |
85b4aa49 | 22 | #include <linux/spinlock.h> |
85b4aa49 RL |
23 | #include <linux/netdevice.h> |
24 | #include <linux/etherdevice.h> | |
25 | #include <linux/ethtool.h> | |
26 | #include <linux/if_ether.h> | |
27 | #include <linux/if_vlan.h> | |
85b4aa49 | 28 | #include <linux/crc32.h> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
85b4aa49 RL |
30 | #include <linux/cpu.h> |
31 | #include <linux/fs.h> | |
32 | #include <linux/sysfs.h> | |
33 | #include <linux/ctype.h> | |
34 | #include <scsi/scsi_tcq.h> | |
35 | #include <scsi/scsicam.h> | |
36 | #include <scsi/scsi_transport.h> | |
37 | #include <scsi/scsi_transport_fc.h> | |
38 | #include <net/rtnetlink.h> | |
39 | ||
40 | #include <scsi/fc/fc_encaps.h> | |
97c8389d | 41 | #include <scsi/fc/fc_fip.h> |
85b4aa49 RL |
42 | |
43 | #include <scsi/libfc.h> | |
44 | #include <scsi/fc_frame.h> | |
45 | #include <scsi/libfcoe.h> | |
85b4aa49 | 46 | |
fdd78027 | 47 | #include "fcoe.h" |
7f349142 | 48 | |
85b4aa49 RL |
49 | MODULE_AUTHOR("Open-FCoE.org"); |
50 | MODULE_DESCRIPTION("FCoE"); | |
9b34ecff | 51 | MODULE_LICENSE("GPL v2"); |
85b4aa49 | 52 | |
05cc7390 YZ |
53 | /* Performance tuning parameters for fcoe */ |
54 | static unsigned int fcoe_ddp_min; | |
55 | module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR); | |
56 | MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \ | |
57 | "Direct Data Placement (DDP)."); | |
58 | ||
dfc1d0fe CL |
59 | DEFINE_MUTEX(fcoe_config_mutex); |
60 | ||
e7a51997 JE |
61 | /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */ |
62 | static DECLARE_COMPLETION(fcoe_flush_completion); | |
63 | ||
85b4aa49 | 64 | /* fcoe host list */ |
090eb6c4 | 65 | /* must only by accessed under the RTNL mutex */ |
85b4aa49 | 66 | LIST_HEAD(fcoe_hostlist); |
5e5e92df | 67 | DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu); |
85b4aa49 | 68 | |
dd3fd72e | 69 | /* Function Prototypes */ |
1875f27e | 70 | static int fcoe_reset(struct Scsi_Host *); |
fdd78027 VD |
71 | static int fcoe_xmit(struct fc_lport *, struct fc_frame *); |
72 | static int fcoe_rcv(struct sk_buff *, struct net_device *, | |
73 | struct packet_type *, struct net_device *); | |
1875f27e RL |
74 | static int fcoe_percpu_receive_thread(void *); |
75 | static void fcoe_clean_pending_queue(struct fc_lport *); | |
76 | static void fcoe_percpu_clean(struct fc_lport *); | |
77 | static int fcoe_link_ok(struct fc_lport *); | |
fdd78027 VD |
78 | |
79 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); | |
80 | static int fcoe_hostlist_add(const struct fc_lport *); | |
fdd78027 | 81 | |
4bb6b515 | 82 | static void fcoe_check_wait_queue(struct fc_lport *, struct sk_buff *); |
85b4aa49 RL |
83 | static int fcoe_device_notification(struct notifier_block *, ulong, void *); |
84 | static void fcoe_dev_setup(void); | |
85 | static void fcoe_dev_cleanup(void); | |
1875f27e RL |
86 | static struct fcoe_interface |
87 | *fcoe_hostlist_lookup_port(const struct net_device *); | |
88 | ||
89 | static int fcoe_fip_recv(struct sk_buff *, struct net_device *, | |
90 | struct packet_type *, struct net_device *); | |
91 | ||
92 | static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *); | |
93 | static void fcoe_update_src_mac(struct fc_lport *, u8 *); | |
94 | static u8 *fcoe_get_src_mac(struct fc_lport *); | |
95 | static void fcoe_destroy_work(struct work_struct *); | |
96 | ||
97 | static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *, | |
98 | unsigned int); | |
99 | static int fcoe_ddp_done(struct fc_lport *, u16); | |
100 | ||
101 | static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *); | |
102 | ||
103 | static int fcoe_create(const char *, struct kernel_param *); | |
104 | static int fcoe_destroy(const char *, struct kernel_param *); | |
55a66d3c VD |
105 | static int fcoe_enable(const char *, struct kernel_param *); |
106 | static int fcoe_disable(const char *, struct kernel_param *); | |
1875f27e | 107 | |
1875f27e RL |
108 | static struct fc_seq *fcoe_elsct_send(struct fc_lport *, |
109 | u32 did, struct fc_frame *, | |
110 | unsigned int op, | |
111 | void (*resp)(struct fc_seq *, | |
112 | struct fc_frame *, | |
113 | void *), | |
114 | void *, u32 timeout); | |
859b7b64 | 115 | static void fcoe_recv_frame(struct sk_buff *skb); |
1875f27e | 116 | |
b84056bf YZ |
117 | static void fcoe_get_lesb(struct fc_lport *, struct fc_els_lesb *); |
118 | ||
1875f27e RL |
119 | module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR); |
120 | __MODULE_PARM_TYPE(create, "string"); | |
55a66d3c | 121 | MODULE_PARM_DESC(create, " Creates fcoe instance on a ethernet interface"); |
1875f27e RL |
122 | module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR); |
123 | __MODULE_PARM_TYPE(destroy, "string"); | |
55a66d3c VD |
124 | MODULE_PARM_DESC(destroy, " Destroys fcoe instance on a ethernet interface"); |
125 | module_param_call(enable, fcoe_enable, NULL, NULL, S_IWUSR); | |
126 | __MODULE_PARM_TYPE(enable, "string"); | |
127 | MODULE_PARM_DESC(enable, " Enables fcoe on a ethernet interface."); | |
128 | module_param_call(disable, fcoe_disable, NULL, NULL, S_IWUSR); | |
129 | __MODULE_PARM_TYPE(disable, "string"); | |
130 | MODULE_PARM_DESC(disable, " Disables fcoe on a ethernet interface."); | |
1875f27e RL |
131 | |
132 | /* notification function for packets from net device */ | |
85b4aa49 RL |
133 | static struct notifier_block fcoe_notifier = { |
134 | .notifier_call = fcoe_device_notification, | |
135 | }; | |
136 | ||
1875f27e RL |
137 | /* notification function for CPU hotplug events */ |
138 | static struct notifier_block fcoe_cpu_notifier = { | |
139 | .notifier_call = fcoe_cpu_callback, | |
140 | }; | |
141 | ||
e9084bb8 CL |
142 | static struct scsi_transport_template *fcoe_transport_template; |
143 | static struct scsi_transport_template *fcoe_vport_transport_template; | |
7f349142 | 144 | |
1875f27e RL |
145 | static int fcoe_vport_destroy(struct fc_vport *); |
146 | static int fcoe_vport_create(struct fc_vport *, bool disabled); | |
147 | static int fcoe_vport_disable(struct fc_vport *, bool disable); | |
148 | static void fcoe_set_vport_symbolic_name(struct fc_vport *); | |
149 | ||
150 | static struct libfc_function_template fcoe_libfc_fcn_templ = { | |
151 | .frame_send = fcoe_xmit, | |
152 | .ddp_setup = fcoe_ddp_setup, | |
153 | .ddp_done = fcoe_ddp_done, | |
154 | .elsct_send = fcoe_elsct_send, | |
b84056bf | 155 | .get_lesb = fcoe_get_lesb, |
1875f27e | 156 | }; |
9a05753b | 157 | |
7f349142 VD |
158 | struct fc_function_template fcoe_transport_function = { |
159 | .show_host_node_name = 1, | |
160 | .show_host_port_name = 1, | |
161 | .show_host_supported_classes = 1, | |
162 | .show_host_supported_fc4s = 1, | |
163 | .show_host_active_fc4s = 1, | |
164 | .show_host_maxframe_size = 1, | |
165 | ||
166 | .show_host_port_id = 1, | |
167 | .show_host_supported_speeds = 1, | |
168 | .get_host_speed = fc_get_host_speed, | |
169 | .show_host_speed = 1, | |
170 | .show_host_port_type = 1, | |
171 | .get_host_port_state = fc_get_host_port_state, | |
172 | .show_host_port_state = 1, | |
173 | .show_host_symbolic_name = 1, | |
174 | ||
175 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
176 | .show_rport_maxframe_size = 1, | |
177 | .show_rport_supported_classes = 1, | |
178 | ||
179 | .show_host_fabric_name = 1, | |
180 | .show_starget_node_name = 1, | |
181 | .show_starget_port_name = 1, | |
182 | .show_starget_port_id = 1, | |
183 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
184 | .show_rport_dev_loss_tmo = 1, | |
185 | .get_fc_host_stats = fc_get_host_stats, | |
186 | .issue_fc_host_lip = fcoe_reset, | |
187 | ||
188 | .terminate_rport_io = fc_rport_terminate_io, | |
9a05753b CL |
189 | |
190 | .vport_create = fcoe_vport_create, | |
191 | .vport_delete = fcoe_vport_destroy, | |
192 | .vport_disable = fcoe_vport_disable, | |
dc8596d3 | 193 | .set_vport_symbolic_name = fcoe_set_vport_symbolic_name, |
a51ab396 SM |
194 | |
195 | .bsg_request = fc_lport_bsg_request, | |
7f349142 VD |
196 | }; |
197 | ||
e9084bb8 CL |
198 | struct fc_function_template fcoe_vport_transport_function = { |
199 | .show_host_node_name = 1, | |
200 | .show_host_port_name = 1, | |
201 | .show_host_supported_classes = 1, | |
202 | .show_host_supported_fc4s = 1, | |
203 | .show_host_active_fc4s = 1, | |
204 | .show_host_maxframe_size = 1, | |
205 | ||
206 | .show_host_port_id = 1, | |
207 | .show_host_supported_speeds = 1, | |
208 | .get_host_speed = fc_get_host_speed, | |
209 | .show_host_speed = 1, | |
210 | .show_host_port_type = 1, | |
211 | .get_host_port_state = fc_get_host_port_state, | |
212 | .show_host_port_state = 1, | |
213 | .show_host_symbolic_name = 1, | |
214 | ||
215 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
216 | .show_rport_maxframe_size = 1, | |
217 | .show_rport_supported_classes = 1, | |
218 | ||
219 | .show_host_fabric_name = 1, | |
220 | .show_starget_node_name = 1, | |
221 | .show_starget_port_name = 1, | |
222 | .show_starget_port_id = 1, | |
223 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
224 | .show_rport_dev_loss_tmo = 1, | |
225 | .get_fc_host_stats = fc_get_host_stats, | |
226 | .issue_fc_host_lip = fcoe_reset, | |
227 | ||
228 | .terminate_rport_io = fc_rport_terminate_io, | |
a51ab396 SM |
229 | |
230 | .bsg_request = fc_lport_bsg_request, | |
e9084bb8 CL |
231 | }; |
232 | ||
7f349142 VD |
233 | static struct scsi_host_template fcoe_shost_template = { |
234 | .module = THIS_MODULE, | |
235 | .name = "FCoE Driver", | |
236 | .proc_name = FCOE_NAME, | |
237 | .queuecommand = fc_queuecommand, | |
238 | .eh_abort_handler = fc_eh_abort, | |
239 | .eh_device_reset_handler = fc_eh_device_reset, | |
240 | .eh_host_reset_handler = fc_eh_host_reset, | |
241 | .slave_alloc = fc_slave_alloc, | |
242 | .change_queue_depth = fc_change_queue_depth, | |
243 | .change_queue_type = fc_change_queue_type, | |
244 | .this_id = -1, | |
14caf44c | 245 | .cmd_per_lun = 3, |
7f349142 VD |
246 | .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, |
247 | .use_clustering = ENABLE_CLUSTERING, | |
248 | .sg_tablesize = SG_ALL, | |
249 | .max_sectors = 0xffff, | |
250 | }; | |
251 | ||
54b649f8 | 252 | /** |
1875f27e RL |
253 | * fcoe_interface_setup() - Setup a FCoE interface |
254 | * @fcoe: The new FCoE interface | |
255 | * @netdev: The net device that the fcoe interface is on | |
54b649f8 CL |
256 | * |
257 | * Returns : 0 for success | |
2e70e241 | 258 | * Locking: must be called with the RTNL mutex held |
54b649f8 CL |
259 | */ |
260 | static int fcoe_interface_setup(struct fcoe_interface *fcoe, | |
261 | struct net_device *netdev) | |
262 | { | |
263 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
264 | struct netdev_hw_addr *ha; | |
5bab87e6 | 265 | struct net_device *real_dev; |
54b649f8 | 266 | u8 flogi_maddr[ETH_ALEN]; |
b7a727f1 | 267 | const struct net_device_ops *ops; |
54b649f8 CL |
268 | |
269 | fcoe->netdev = netdev; | |
270 | ||
b7a727f1 YZ |
271 | /* Let LLD initialize for FCoE */ |
272 | ops = netdev->netdev_ops; | |
273 | if (ops->ndo_fcoe_enable) { | |
274 | if (ops->ndo_fcoe_enable(netdev)) | |
275 | FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE" | |
276 | " specific feature for LLD.\n"); | |
277 | } | |
278 | ||
54b649f8 CL |
279 | /* Do not support for bonding device */ |
280 | if ((netdev->priv_flags & IFF_MASTER_ALB) || | |
281 | (netdev->priv_flags & IFF_SLAVE_INACTIVE) || | |
282 | (netdev->priv_flags & IFF_MASTER_8023AD)) { | |
59d92516 | 283 | FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n"); |
54b649f8 CL |
284 | return -EOPNOTSUPP; |
285 | } | |
286 | ||
287 | /* look for SAN MAC address, if multiple SAN MACs exist, only | |
288 | * use the first one for SPMA */ | |
5bab87e6 YZ |
289 | real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ? |
290 | vlan_dev_real_dev(netdev) : netdev; | |
54b649f8 | 291 | rcu_read_lock(); |
5bab87e6 | 292 | for_each_dev_addr(real_dev, ha) { |
54b649f8 | 293 | if ((ha->type == NETDEV_HW_ADDR_T_SAN) && |
bf361707 | 294 | (is_valid_ether_addr(ha->addr))) { |
54b649f8 CL |
295 | memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); |
296 | fip->spma = 1; | |
297 | break; | |
298 | } | |
299 | } | |
300 | rcu_read_unlock(); | |
301 | ||
302 | /* setup Source Mac Address */ | |
303 | if (!fip->spma) | |
304 | memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); | |
305 | ||
306 | /* | |
307 | * Add FCoE MAC address as second unicast MAC address | |
308 | * or enter promiscuous mode if not capable of listening | |
309 | * for multiple unicast MACs. | |
310 | */ | |
54b649f8 CL |
311 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
312 | dev_unicast_add(netdev, flogi_maddr); | |
313 | if (fip->spma) | |
314 | dev_unicast_add(netdev, fip->ctl_src_addr); | |
315 | dev_mc_add(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0); | |
54b649f8 CL |
316 | |
317 | /* | |
318 | * setup the receive function from ethernet driver | |
319 | * on the ethertype for the given device | |
320 | */ | |
321 | fcoe->fcoe_packet_type.func = fcoe_rcv; | |
322 | fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE); | |
323 | fcoe->fcoe_packet_type.dev = netdev; | |
324 | dev_add_pack(&fcoe->fcoe_packet_type); | |
325 | ||
326 | fcoe->fip_packet_type.func = fcoe_fip_recv; | |
327 | fcoe->fip_packet_type.type = htons(ETH_P_FIP); | |
328 | fcoe->fip_packet_type.dev = netdev; | |
329 | dev_add_pack(&fcoe->fip_packet_type); | |
330 | ||
331 | return 0; | |
332 | } | |
333 | ||
030f4e00 | 334 | /** |
1875f27e RL |
335 | * fcoe_interface_create() - Create a FCoE interface on a net device |
336 | * @netdev: The net device to create the FCoE interface on | |
030f4e00 CL |
337 | * |
338 | * Returns: pointer to a struct fcoe_interface or NULL on error | |
339 | */ | |
340 | static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev) | |
341 | { | |
342 | struct fcoe_interface *fcoe; | |
59d92516 | 343 | int err; |
030f4e00 CL |
344 | |
345 | fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL); | |
346 | if (!fcoe) { | |
347 | FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n"); | |
348 | return NULL; | |
349 | } | |
350 | ||
2e70e241 | 351 | dev_hold(netdev); |
030f4e00 | 352 | kref_init(&fcoe->kref); |
54b649f8 CL |
353 | |
354 | /* | |
355 | * Initialize FIP. | |
356 | */ | |
357 | fcoe_ctlr_init(&fcoe->ctlr); | |
358 | fcoe->ctlr.send = fcoe_fip_send; | |
359 | fcoe->ctlr.update_mac = fcoe_update_src_mac; | |
11b56188 | 360 | fcoe->ctlr.get_src_addr = fcoe_get_src_mac; |
54b649f8 | 361 | |
59d92516 | 362 | err = fcoe_interface_setup(fcoe, netdev); |
363 | if (err) { | |
364 | fcoe_ctlr_destroy(&fcoe->ctlr); | |
365 | kfree(fcoe); | |
366 | dev_put(netdev); | |
367 | return NULL; | |
368 | } | |
030f4e00 CL |
369 | |
370 | return fcoe; | |
371 | } | |
372 | ||
54b649f8 | 373 | /** |
1875f27e RL |
374 | * fcoe_interface_cleanup() - Clean up a FCoE interface |
375 | * @fcoe: The FCoE interface to be cleaned up | |
2e70e241 CL |
376 | * |
377 | * Caller must be holding the RTNL mutex | |
54b649f8 CL |
378 | */ |
379 | void fcoe_interface_cleanup(struct fcoe_interface *fcoe) | |
380 | { | |
381 | struct net_device *netdev = fcoe->netdev; | |
382 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
383 | u8 flogi_maddr[ETH_ALEN]; | |
b7a727f1 | 384 | const struct net_device_ops *ops; |
54b649f8 CL |
385 | |
386 | /* | |
387 | * Don't listen for Ethernet packets anymore. | |
388 | * synchronize_net() ensures that the packet handlers are not running | |
389 | * on another CPU. dev_remove_pack() would do that, this calls the | |
390 | * unsyncronized version __dev_remove_pack() to avoid multiple delays. | |
391 | */ | |
392 | __dev_remove_pack(&fcoe->fcoe_packet_type); | |
393 | __dev_remove_pack(&fcoe->fip_packet_type); | |
394 | synchronize_net(); | |
395 | ||
54b649f8 | 396 | /* Delete secondary MAC addresses */ |
54b649f8 CL |
397 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
398 | dev_unicast_delete(netdev, flogi_maddr); | |
54b649f8 CL |
399 | if (fip->spma) |
400 | dev_unicast_delete(netdev, fip->ctl_src_addr); | |
401 | dev_mc_delete(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0); | |
b7a727f1 YZ |
402 | |
403 | /* Tell the LLD we are done w/ FCoE */ | |
404 | ops = netdev->netdev_ops; | |
405 | if (ops->ndo_fcoe_disable) { | |
406 | if (ops->ndo_fcoe_disable(netdev)) | |
407 | FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" | |
408 | " specific feature for LLD.\n"); | |
409 | } | |
54b649f8 CL |
410 | } |
411 | ||
030f4e00 CL |
412 | /** |
413 | * fcoe_interface_release() - fcoe_port kref release function | |
1875f27e | 414 | * @kref: Embedded reference count in an fcoe_interface struct |
030f4e00 CL |
415 | */ |
416 | static void fcoe_interface_release(struct kref *kref) | |
417 | { | |
418 | struct fcoe_interface *fcoe; | |
2e70e241 | 419 | struct net_device *netdev; |
030f4e00 CL |
420 | |
421 | fcoe = container_of(kref, struct fcoe_interface, kref); | |
2e70e241 CL |
422 | netdev = fcoe->netdev; |
423 | /* tear-down the FCoE controller */ | |
424 | fcoe_ctlr_destroy(&fcoe->ctlr); | |
030f4e00 | 425 | kfree(fcoe); |
2e70e241 | 426 | dev_put(netdev); |
030f4e00 CL |
427 | } |
428 | ||
429 | /** | |
1875f27e RL |
430 | * fcoe_interface_get() - Get a reference to a FCoE interface |
431 | * @fcoe: The FCoE interface to be held | |
030f4e00 CL |
432 | */ |
433 | static inline void fcoe_interface_get(struct fcoe_interface *fcoe) | |
434 | { | |
435 | kref_get(&fcoe->kref); | |
436 | } | |
437 | ||
438 | /** | |
1875f27e RL |
439 | * fcoe_interface_put() - Put a reference to a FCoE interface |
440 | * @fcoe: The FCoE interface to be released | |
030f4e00 CL |
441 | */ |
442 | static inline void fcoe_interface_put(struct fcoe_interface *fcoe) | |
443 | { | |
444 | kref_put(&fcoe->kref, fcoe_interface_release); | |
445 | } | |
446 | ||
ab6b85c1 | 447 | /** |
1875f27e RL |
448 | * fcoe_fip_recv() - Handler for received FIP frames |
449 | * @skb: The receive skb | |
450 | * @netdev: The associated net device | |
451 | * @ptype: The packet_type structure which was used to register this handler | |
452 | * @orig_dev: The original net_device the the skb was received on. | |
453 | * (in case dev is a bond) | |
ab6b85c1 VD |
454 | * |
455 | * Returns: 0 for success | |
456 | */ | |
1875f27e | 457 | static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, |
ab6b85c1 VD |
458 | struct packet_type *ptype, |
459 | struct net_device *orig_dev) | |
460 | { | |
259ad85d | 461 | struct fcoe_interface *fcoe; |
ab6b85c1 | 462 | |
259ad85d | 463 | fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); |
3fe9a0ba | 464 | fcoe_ctlr_recv(&fcoe->ctlr, skb); |
ab6b85c1 VD |
465 | return 0; |
466 | } | |
467 | ||
468 | /** | |
1875f27e RL |
469 | * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame |
470 | * @fip: The FCoE controller | |
471 | * @skb: The FIP packet to be sent | |
ab6b85c1 VD |
472 | */ |
473 | static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
474 | { | |
3fe9a0ba | 475 | skb->dev = fcoe_from_ctlr(fip)->netdev; |
ab6b85c1 VD |
476 | dev_queue_xmit(skb); |
477 | } | |
478 | ||
479 | /** | |
1875f27e RL |
480 | * fcoe_update_src_mac() - Update the Ethernet MAC filters |
481 | * @lport: The local port to update the source MAC on | |
482 | * @addr: Unicast MAC address to add | |
ab6b85c1 VD |
483 | * |
484 | * Remove any previously-set unicast MAC filter. | |
485 | * Add secondary FCoE MAC address filter for our OUI. | |
486 | */ | |
11b56188 | 487 | static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) |
ab6b85c1 | 488 | { |
11b56188 CL |
489 | struct fcoe_port *port = lport_priv(lport); |
490 | struct fcoe_interface *fcoe = port->fcoe; | |
25024989 | 491 | |
ab6b85c1 | 492 | rtnl_lock(); |
11b56188 CL |
493 | if (!is_zero_ether_addr(port->data_src_addr)) |
494 | dev_unicast_delete(fcoe->netdev, port->data_src_addr); | |
495 | if (!is_zero_ether_addr(addr)) | |
496 | dev_unicast_add(fcoe->netdev, addr); | |
497 | memcpy(port->data_src_addr, addr, ETH_ALEN); | |
ab6b85c1 VD |
498 | rtnl_unlock(); |
499 | } | |
500 | ||
11b56188 CL |
501 | /** |
502 | * fcoe_get_src_mac() - return the Ethernet source address for an lport | |
503 | * @lport: libfc lport | |
504 | */ | |
505 | static u8 *fcoe_get_src_mac(struct fc_lport *lport) | |
506 | { | |
507 | struct fcoe_port *port = lport_priv(lport); | |
508 | ||
509 | return port->data_src_addr; | |
510 | } | |
511 | ||
7f349142 | 512 | /** |
1875f27e RL |
513 | * fcoe_lport_config() - Set up a local port |
514 | * @lport: The local port to be setup | |
7f349142 VD |
515 | * |
516 | * Returns: 0 for success | |
517 | */ | |
1875f27e | 518 | static int fcoe_lport_config(struct fc_lport *lport) |
7f349142 | 519 | { |
1875f27e RL |
520 | lport->link_up = 0; |
521 | lport->qfull = 0; | |
522 | lport->max_retry_count = 3; | |
523 | lport->max_rport_retry_count = 3; | |
524 | lport->e_d_tov = 2 * 1000; /* FC-FS default */ | |
525 | lport->r_a_tov = 2 * 2 * 1000; | |
526 | lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | | |
527 | FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); | |
528 | lport->does_npiv = 1; | |
529 | ||
530 | fc_lport_init_stats(lport); | |
7f349142 VD |
531 | |
532 | /* lport fc_lport related configuration */ | |
1875f27e | 533 | fc_lport_config(lport); |
7f349142 VD |
534 | |
535 | /* offload related configuration */ | |
1875f27e RL |
536 | lport->crc_offload = 0; |
537 | lport->seq_offload = 0; | |
538 | lport->lro_enabled = 0; | |
539 | lport->lro_xid = 0; | |
540 | lport->lso_max = 0; | |
7f349142 VD |
541 | |
542 | return 0; | |
543 | } | |
544 | ||
1047f221 | 545 | /** |
1875f27e RL |
546 | * fcoe_queue_timer() - The fcoe queue timer |
547 | * @lport: The local port | |
1047f221 VD |
548 | * |
549 | * Calls fcoe_check_wait_queue on timeout | |
1047f221 | 550 | */ |
1875f27e | 551 | static void fcoe_queue_timer(ulong lport) |
1047f221 | 552 | { |
1875f27e | 553 | fcoe_check_wait_queue((struct fc_lport *)lport, NULL); |
1047f221 VD |
554 | } |
555 | ||
dcece412 YZ |
556 | /** |
557 | * fcoe_get_wwn() - Get the world wide name from LLD if it supports it | |
558 | * @netdev: the associated net device | |
559 | * @wwn: the output WWN | |
560 | * @type: the type of WWN (WWPN or WWNN) | |
561 | * | |
562 | * Returns: 0 for success | |
563 | */ | |
564 | static int fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type) | |
565 | { | |
566 | const struct net_device_ops *ops = netdev->netdev_ops; | |
567 | ||
568 | if (ops->ndo_fcoe_get_wwn) | |
569 | return ops->ndo_fcoe_get_wwn(netdev, wwn, type); | |
570 | return -EINVAL; | |
571 | } | |
572 | ||
7f349142 | 573 | /** |
1875f27e RL |
574 | * fcoe_netdev_config() - Set up net devive for SW FCoE |
575 | * @lport: The local port that is associated with the net device | |
576 | * @netdev: The associated net device | |
7f349142 | 577 | * |
1875f27e | 578 | * Must be called after fcoe_lport_config() as it will use local port mutex |
7f349142 | 579 | * |
1875f27e | 580 | * Returns: 0 for success |
7f349142 | 581 | */ |
1875f27e | 582 | static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) |
7f349142 VD |
583 | { |
584 | u32 mfs; | |
585 | u64 wwnn, wwpn; | |
25024989 | 586 | struct fcoe_interface *fcoe; |
014f5c3f | 587 | struct fcoe_port *port; |
cc0136c2 | 588 | int vid = 0; |
7f349142 VD |
589 | |
590 | /* Setup lport private data to point to fcoe softc */ | |
1875f27e | 591 | port = lport_priv(lport); |
25024989 | 592 | fcoe = port->fcoe; |
7f349142 VD |
593 | |
594 | /* | |
595 | * Determine max frame size based on underlying device and optional | |
596 | * user-configured limit. If the MFS is too low, fcoe_link_ok() | |
597 | * will return 0, so do this first. | |
598 | */ | |
7221d7e5 YZ |
599 | mfs = netdev->mtu; |
600 | if (netdev->features & NETIF_F_FCOE_MTU) { | |
601 | mfs = FCOE_MTU; | |
602 | FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); | |
603 | } | |
604 | mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); | |
1875f27e | 605 | if (fc_set_mfs(lport, mfs)) |
7f349142 VD |
606 | return -EINVAL; |
607 | ||
7f349142 | 608 | /* offload features support */ |
1d1b88dc | 609 | if (netdev->features & NETIF_F_SG) |
1875f27e | 610 | lport->sg_supp = 1; |
7f349142 | 611 | |
7f349142 | 612 | if (netdev->features & NETIF_F_FCOE_CRC) { |
1875f27e | 613 | lport->crc_offload = 1; |
d5488eb9 | 614 | FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); |
7f349142 | 615 | } |
7f349142 | 616 | if (netdev->features & NETIF_F_FSO) { |
1875f27e RL |
617 | lport->seq_offload = 1; |
618 | lport->lso_max = netdev->gso_max_size; | |
d5488eb9 | 619 | FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", |
1875f27e | 620 | lport->lso_max); |
7f349142 | 621 | } |
7f349142 | 622 | if (netdev->fcoe_ddp_xid) { |
1875f27e RL |
623 | lport->lro_enabled = 1; |
624 | lport->lro_xid = netdev->fcoe_ddp_xid; | |
d5488eb9 | 625 | FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", |
1875f27e | 626 | lport->lro_xid); |
7f349142 | 627 | } |
014f5c3f CL |
628 | skb_queue_head_init(&port->fcoe_pending_queue); |
629 | port->fcoe_pending_queue_active = 0; | |
1875f27e | 630 | setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport); |
7f349142 | 631 | |
1875f27e | 632 | if (!lport->vport) { |
cc0136c2 YZ |
633 | /* |
634 | * Use NAA 1&2 (FC-FS Rev. 2.0, Sec. 15) to generate WWNN/WWPN: | |
635 | * For WWNN, we use NAA 1 w/ bit 27-16 of word 0 as 0. | |
636 | * For WWPN, we use NAA 2 w/ bit 27-16 of word 0 from VLAN ID | |
637 | */ | |
638 | if (netdev->priv_flags & IFF_802_1Q_VLAN) | |
639 | vid = vlan_dev_vlan_id(netdev); | |
dcece412 YZ |
640 | |
641 | if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN)) | |
642 | wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0); | |
1875f27e | 643 | fc_set_wwnn(lport, wwnn); |
dcece412 YZ |
644 | if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN)) |
645 | wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, | |
646 | 2, vid); | |
1875f27e | 647 | fc_set_wwpn(lport, wwpn); |
9a05753b | 648 | } |
7f349142 | 649 | |
7f349142 VD |
650 | return 0; |
651 | } | |
652 | ||
653 | /** | |
1875f27e RL |
654 | * fcoe_shost_config() - Set up the SCSI host associated with a local port |
655 | * @lport: The local port | |
656 | * @shost: The SCSI host to associate with the local port | |
657 | * @dev: The device associated with the SCSI host | |
7f349142 VD |
658 | * |
659 | * Must be called after fcoe_lport_config() and fcoe_netdev_config() | |
660 | * | |
1875f27e | 661 | * Returns: 0 for success |
7f349142 | 662 | */ |
1875f27e RL |
663 | static int fcoe_shost_config(struct fc_lport *lport, struct Scsi_Host *shost, |
664 | struct device *dev) | |
7f349142 VD |
665 | { |
666 | int rc = 0; | |
667 | ||
668 | /* lport scsi host config */ | |
1875f27e RL |
669 | lport->host->max_lun = FCOE_MAX_LUN; |
670 | lport->host->max_id = FCOE_MAX_FCP_TARGET; | |
671 | lport->host->max_channel = 0; | |
672 | if (lport->vport) | |
673 | lport->host->transportt = fcoe_vport_transport_template; | |
e9084bb8 | 674 | else |
1875f27e | 675 | lport->host->transportt = fcoe_transport_template; |
7f349142 VD |
676 | |
677 | /* add the new host to the SCSI-ml */ | |
1875f27e | 678 | rc = scsi_add_host(lport->host, dev); |
7f349142 | 679 | if (rc) { |
1875f27e | 680 | FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " |
d5488eb9 | 681 | "error on scsi_add_host\n"); |
7f349142 VD |
682 | return rc; |
683 | } | |
9a05753b | 684 | |
1875f27e RL |
685 | if (!lport->vport) |
686 | fc_host_max_npiv_vports(lport->host) = USHORT_MAX; | |
9a05753b | 687 | |
1875f27e | 688 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, |
5baa17c3 | 689 | "%s v%s over %s", FCOE_NAME, FCOE_VERSION, |
1875f27e | 690 | fcoe_netdev(lport)->name); |
7f349142 VD |
691 | |
692 | return 0; | |
693 | } | |
694 | ||
1875f27e RL |
695 | /** |
696 | * fcoe_oem_match() - The match routine for the offloaded exchange manager | |
697 | * @fp: The I/O frame | |
d7179680 | 698 | * |
1875f27e RL |
699 | * This routine will be associated with an exchange manager (EM). When |
700 | * the libfc exchange handling code is looking for an EM to use it will | |
701 | * call this routine and pass it the frame that it wishes to send. This | |
702 | * routine will return True if the associated EM is to be used and False | |
703 | * if the echange code should continue looking for an EM. | |
704 | * | |
705 | * The offload EM that this routine is associated with will handle any | |
706 | * packets that are for SCSI read requests. | |
707 | * | |
708 | * Returns: True for read types I/O, otherwise returns false. | |
d7179680 VD |
709 | */ |
710 | bool fcoe_oem_match(struct fc_frame *fp) | |
711 | { | |
05cc7390 YZ |
712 | return fc_fcp_is_read(fr_fsp(fp)) && |
713 | (fr_fsp(fp)->data_len > fcoe_ddp_min); | |
d7179680 VD |
714 | } |
715 | ||
7f349142 | 716 | /** |
1875f27e RL |
717 | * fcoe_em_config() - Allocate and configure an exchange manager |
718 | * @lport: The local port that the new EM will be associated with | |
7f349142 | 719 | * |
1875f27e | 720 | * Returns: 0 on success |
7f349142 | 721 | */ |
1875f27e | 722 | static inline int fcoe_em_config(struct fc_lport *lport) |
7f349142 | 723 | { |
1875f27e | 724 | struct fcoe_port *port = lport_priv(lport); |
25024989 CL |
725 | struct fcoe_interface *fcoe = port->fcoe; |
726 | struct fcoe_interface *oldfcoe = NULL; | |
1d1b88dc | 727 | struct net_device *old_real_dev, *cur_real_dev; |
d7179680 VD |
728 | u16 min_xid = FCOE_MIN_XID; |
729 | u16 max_xid = FCOE_MAX_XID; | |
730 | ||
731 | /* | |
732 | * Check if need to allocate an em instance for | |
733 | * offload exchange ids to be shared across all VN_PORTs/lport. | |
734 | */ | |
1875f27e RL |
735 | if (!lport->lro_enabled || !lport->lro_xid || |
736 | (lport->lro_xid >= max_xid)) { | |
737 | lport->lro_xid = 0; | |
d7179680 VD |
738 | goto skip_oem; |
739 | } | |
740 | ||
741 | /* | |
742 | * Reuse existing offload em instance in case | |
1d1b88dc | 743 | * it is already allocated on real eth device |
d7179680 | 744 | */ |
25024989 CL |
745 | if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
746 | cur_real_dev = vlan_dev_real_dev(fcoe->netdev); | |
1d1b88dc | 747 | else |
25024989 | 748 | cur_real_dev = fcoe->netdev; |
1d1b88dc | 749 | |
25024989 | 750 | list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { |
25024989 CL |
751 | if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
752 | old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); | |
1d1b88dc | 753 | else |
25024989 | 754 | old_real_dev = oldfcoe->netdev; |
1d1b88dc VD |
755 | |
756 | if (cur_real_dev == old_real_dev) { | |
991cbb60 | 757 | fcoe->oem = oldfcoe->oem; |
d7179680 VD |
758 | break; |
759 | } | |
760 | } | |
761 | ||
991cbb60 | 762 | if (fcoe->oem) { |
1875f27e | 763 | if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { |
d7179680 VD |
764 | printk(KERN_ERR "fcoe_em_config: failed to add " |
765 | "offload em:%p on interface:%s\n", | |
991cbb60 | 766 | fcoe->oem, fcoe->netdev->name); |
d7179680 VD |
767 | return -ENOMEM; |
768 | } | |
769 | } else { | |
1875f27e RL |
770 | fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, |
771 | FCOE_MIN_XID, lport->lro_xid, | |
772 | fcoe_oem_match); | |
991cbb60 | 773 | if (!fcoe->oem) { |
d7179680 VD |
774 | printk(KERN_ERR "fcoe_em_config: failed to allocate " |
775 | "em for offload exches on interface:%s\n", | |
25024989 | 776 | fcoe->netdev->name); |
d7179680 VD |
777 | return -ENOMEM; |
778 | } | |
779 | } | |
780 | ||
781 | /* | |
782 | * Exclude offload EM xid range from next EM xid range. | |
783 | */ | |
1875f27e | 784 | min_xid += lport->lro_xid + 1; |
d7179680 VD |
785 | |
786 | skip_oem: | |
1875f27e | 787 | if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { |
d7179680 | 788 | printk(KERN_ERR "fcoe_em_config: failed to " |
25024989 | 789 | "allocate em on interface %s\n", fcoe->netdev->name); |
7f349142 | 790 | return -ENOMEM; |
d7179680 | 791 | } |
7f349142 VD |
792 | |
793 | return 0; | |
794 | } | |
795 | ||
796 | /** | |
1875f27e RL |
797 | * fcoe_if_destroy() - Tear down a SW FCoE instance |
798 | * @lport: The local port to be destroyed | |
7f349142 | 799 | */ |
af7f85d9 | 800 | static void fcoe_if_destroy(struct fc_lport *lport) |
7f349142 | 801 | { |
014f5c3f CL |
802 | struct fcoe_port *port = lport_priv(lport); |
803 | struct fcoe_interface *fcoe = port->fcoe; | |
25024989 | 804 | struct net_device *netdev = fcoe->netdev; |
7f349142 | 805 | |
d5488eb9 | 806 | FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); |
7f349142 | 807 | |
7f349142 | 808 | /* Logout of the fabric */ |
af7f85d9 | 809 | fc_fabric_logoff(lport); |
7f349142 | 810 | |
54b649f8 CL |
811 | /* Cleanup the fc_lport */ |
812 | fc_lport_destroy(lport); | |
813 | fc_fcp_destroy(lport); | |
814 | ||
815 | /* Stop the transmit retry timer */ | |
816 | del_timer_sync(&port->timer); | |
ab6b85c1 | 817 | |
54b649f8 CL |
818 | /* Free existing transmit skbs */ |
819 | fcoe_clean_pending_queue(lport); | |
820 | ||
11b56188 CL |
821 | rtnl_lock(); |
822 | if (!is_zero_ether_addr(port->data_src_addr)) | |
823 | dev_unicast_delete(netdev, port->data_src_addr); | |
824 | rtnl_unlock(); | |
825 | ||
54b649f8 CL |
826 | /* receives may not be stopped until after this */ |
827 | fcoe_interface_put(fcoe); | |
7f349142 | 828 | |
f161fb72 | 829 | /* Free queued packets for the per-CPU receive threads */ |
af7f85d9 | 830 | fcoe_percpu_clean(lport); |
f161fb72 | 831 | |
7f349142 | 832 | /* Detach from the scsi-ml */ |
af7f85d9 CL |
833 | fc_remove_host(lport->host); |
834 | scsi_remove_host(lport->host); | |
7f349142 VD |
835 | |
836 | /* There are no more rports or I/O, free the EM */ | |
af7f85d9 | 837 | fc_exch_mgr_free(lport); |
7f349142 | 838 | |
7f349142 | 839 | /* Free memory used by statistical counters */ |
af7f85d9 | 840 | fc_lport_free_stats(lport); |
7f349142 | 841 | |
2e70e241 | 842 | /* Release the Scsi_Host */ |
af7f85d9 | 843 | scsi_host_put(lport->host); |
7f349142 VD |
844 | } |
845 | ||
1875f27e RL |
846 | /** |
847 | * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device | |
848 | * @lport: The local port to setup DDP for | |
849 | * @xid: The exchange ID for this DDP transfer | |
850 | * @sgl: The scatterlist describing this transfer | |
851 | * @sgc: The number of sg items | |
7f349142 | 852 | * |
1875f27e | 853 | * Returns: 0 if the DDP context was not configured |
7f349142 | 854 | */ |
1875f27e RL |
855 | static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, |
856 | struct scatterlist *sgl, unsigned int sgc) | |
7f349142 | 857 | { |
1875f27e | 858 | struct net_device *netdev = fcoe_netdev(lport); |
7f349142 | 859 | |
1875f27e RL |
860 | if (netdev->netdev_ops->ndo_fcoe_ddp_setup) |
861 | return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, | |
862 | xid, sgl, | |
863 | sgc); | |
7f349142 VD |
864 | |
865 | return 0; | |
866 | } | |
867 | ||
1875f27e RL |
868 | /** |
869 | * fcoe_ddp_done() - Call a LLD's ddp_done through the net device | |
870 | * @lport: The local port to complete DDP on | |
871 | * @xid: The exchange ID for this DDP transfer | |
7f349142 | 872 | * |
1875f27e | 873 | * Returns: the length of data that have been completed by DDP |
7f349142 | 874 | */ |
1875f27e | 875 | static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) |
7f349142 | 876 | { |
1875f27e | 877 | struct net_device *netdev = fcoe_netdev(lport); |
7f349142 | 878 | |
1875f27e RL |
879 | if (netdev->netdev_ops->ndo_fcoe_ddp_done) |
880 | return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); | |
7f349142 VD |
881 | return 0; |
882 | } | |
883 | ||
7f349142 | 884 | /** |
1875f27e RL |
885 | * fcoe_if_create() - Create a FCoE instance on an interface |
886 | * @fcoe: The FCoE interface to create a local port on | |
887 | * @parent: The device pointer to be the parent in sysfs for the SCSI host | |
888 | * @npiv: Indicates if the port is a vport or not | |
7f349142 | 889 | * |
1875f27e | 890 | * Creates a fc_lport instance and a Scsi_Host instance and configure them. |
7f349142 | 891 | * |
1875f27e | 892 | * Returns: The allocated fc_lport or an error pointer |
7f349142 | 893 | */ |
030f4e00 | 894 | static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, |
9a05753b | 895 | struct device *parent, int npiv) |
7f349142 | 896 | { |
1875f27e | 897 | struct net_device *netdev = fcoe->netdev; |
af7f85d9 | 898 | struct fc_lport *lport = NULL; |
014f5c3f | 899 | struct fcoe_port *port; |
7f349142 | 900 | struct Scsi_Host *shost; |
1875f27e | 901 | int rc; |
9a05753b CL |
902 | /* |
903 | * parent is only a vport if npiv is 1, | |
904 | * but we'll only use vport in that case so go ahead and set it | |
905 | */ | |
906 | struct fc_vport *vport = dev_to_vport(parent); | |
7f349142 | 907 | |
d5488eb9 | 908 | FCOE_NETDEV_DBG(netdev, "Create Interface\n"); |
7f349142 | 909 | |
9a05753b CL |
910 | if (!npiv) { |
911 | lport = libfc_host_alloc(&fcoe_shost_template, | |
912 | sizeof(struct fcoe_port)); | |
913 | } else { | |
914 | lport = libfc_vport_create(vport, | |
915 | sizeof(struct fcoe_port)); | |
916 | } | |
86221969 | 917 | if (!lport) { |
d5488eb9 | 918 | FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); |
af7f85d9 | 919 | rc = -ENOMEM; |
030f4e00 | 920 | goto out; |
7f349142 | 921 | } |
86221969 | 922 | shost = lport->host; |
014f5c3f | 923 | port = lport_priv(lport); |
2e70e241 | 924 | port->lport = lport; |
014f5c3f | 925 | port->fcoe = fcoe; |
2e70e241 | 926 | INIT_WORK(&port->destroy_work, fcoe_destroy_work); |
7f349142 | 927 | |
1875f27e | 928 | /* configure a fc_lport including the exchange manager */ |
af7f85d9 | 929 | rc = fcoe_lport_config(lport); |
7f349142 | 930 | if (rc) { |
d5488eb9 RL |
931 | FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " |
932 | "interface\n"); | |
7f349142 VD |
933 | goto out_host_put; |
934 | } | |
935 | ||
9a05753b CL |
936 | if (npiv) { |
937 | FCOE_NETDEV_DBG(netdev, "Setting vport names, 0x%llX 0x%llX\n", | |
1875f27e | 938 | vport->node_name, vport->port_name); |
9a05753b CL |
939 | fc_set_wwnn(lport, vport->node_name); |
940 | fc_set_wwpn(lport, vport->port_name); | |
941 | } | |
942 | ||
ab6b85c1 | 943 | /* configure lport network properties */ |
af7f85d9 | 944 | rc = fcoe_netdev_config(lport, netdev); |
ab6b85c1 | 945 | if (rc) { |
d5488eb9 RL |
946 | FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " |
947 | "interface\n"); | |
54b649f8 | 948 | goto out_lp_destroy; |
ab6b85c1 | 949 | } |
97c8389d | 950 | |
7f349142 | 951 | /* configure lport scsi host properties */ |
af7f85d9 | 952 | rc = fcoe_shost_config(lport, shost, parent); |
7f349142 | 953 | if (rc) { |
d5488eb9 RL |
954 | FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " |
955 | "interface\n"); | |
54b649f8 | 956 | goto out_lp_destroy; |
7f349142 VD |
957 | } |
958 | ||
96316099 | 959 | /* Initialize the library */ |
af7f85d9 | 960 | rc = fcoe_libfc_config(lport, &fcoe_libfc_fcn_templ); |
7f349142 | 961 | if (rc) { |
96316099 | 962 | FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " |
d5488eb9 | 963 | "interface\n"); |
96316099 | 964 | goto out_lp_destroy; |
7f349142 VD |
965 | } |
966 | ||
9a05753b CL |
967 | if (!npiv) { |
968 | /* | |
969 | * fcoe_em_alloc() and fcoe_hostlist_add() both | |
970 | * need to be atomic with respect to other changes to the | |
971 | * hostlist since fcoe_em_alloc() looks for an existing EM | |
972 | * instance on host list updated by fcoe_hostlist_add(). | |
973 | * | |
974 | * This is currently handled through the fcoe_config_mutex | |
975 | * begin held. | |
976 | */ | |
c863df33 | 977 | |
9a05753b CL |
978 | /* lport exch manager allocation */ |
979 | rc = fcoe_em_config(lport); | |
980 | if (rc) { | |
981 | FCOE_NETDEV_DBG(netdev, "Could not configure the EM " | |
1875f27e | 982 | "for the interface\n"); |
9a05753b CL |
983 | goto out_lp_destroy; |
984 | } | |
7f349142 VD |
985 | } |
986 | ||
030f4e00 | 987 | fcoe_interface_get(fcoe); |
af7f85d9 | 988 | return lport; |
7f349142 VD |
989 | |
990 | out_lp_destroy: | |
af7f85d9 | 991 | fc_exch_mgr_free(lport); |
7f349142 | 992 | out_host_put: |
af7f85d9 CL |
993 | scsi_host_put(lport->host); |
994 | out: | |
995 | return ERR_PTR(rc); | |
7f349142 VD |
996 | } |
997 | ||
998 | /** | |
1875f27e | 999 | * fcoe_if_init() - Initialization routine for fcoe.ko |
7f349142 | 1000 | * |
1875f27e RL |
1001 | * Attaches the SW FCoE transport to the FC transport |
1002 | * | |
1003 | * Returns: 0 on success | |
7f349142 VD |
1004 | */ |
1005 | static int __init fcoe_if_init(void) | |
1006 | { | |
1007 | /* attach to scsi transport */ | |
e9084bb8 CL |
1008 | fcoe_transport_template = fc_attach_transport(&fcoe_transport_function); |
1009 | fcoe_vport_transport_template = | |
1010 | fc_attach_transport(&fcoe_vport_transport_function); | |
7f349142 | 1011 | |
e9084bb8 | 1012 | if (!fcoe_transport_template) { |
d5488eb9 | 1013 | printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); |
7f349142 VD |
1014 | return -ENODEV; |
1015 | } | |
1016 | ||
1017 | return 0; | |
1018 | } | |
1019 | ||
1020 | /** | |
1875f27e RL |
1021 | * fcoe_if_exit() - Tear down fcoe.ko |
1022 | * | |
1023 | * Detaches the SW FCoE transport from the FC transport | |
7f349142 | 1024 | * |
1875f27e | 1025 | * Returns: 0 on success |
7f349142 VD |
1026 | */ |
1027 | int __exit fcoe_if_exit(void) | |
1028 | { | |
e9084bb8 CL |
1029 | fc_release_transport(fcoe_transport_template); |
1030 | fc_release_transport(fcoe_vport_transport_template); | |
1031 | fcoe_transport_template = NULL; | |
1032 | fcoe_vport_transport_template = NULL; | |
7f349142 VD |
1033 | return 0; |
1034 | } | |
1035 | ||
8976f424 | 1036 | /** |
1875f27e RL |
1037 | * fcoe_percpu_thread_create() - Create a receive thread for an online CPU |
1038 | * @cpu: The CPU index of the CPU to create a receive thread for | |
8976f424 RL |
1039 | */ |
1040 | static void fcoe_percpu_thread_create(unsigned int cpu) | |
1041 | { | |
1042 | struct fcoe_percpu_s *p; | |
1043 | struct task_struct *thread; | |
1044 | ||
1045 | p = &per_cpu(fcoe_percpu, cpu); | |
1046 | ||
1047 | thread = kthread_create(fcoe_percpu_receive_thread, | |
1048 | (void *)p, "fcoethread/%d", cpu); | |
1049 | ||
e7a51997 | 1050 | if (likely(!IS_ERR(thread))) { |
8976f424 RL |
1051 | kthread_bind(thread, cpu); |
1052 | wake_up_process(thread); | |
1053 | ||
1054 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1055 | p->thread = thread; | |
1056 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1057 | } | |
1058 | } | |
1059 | ||
1060 | /** | |
1875f27e RL |
1061 | * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU |
1062 | * @cpu: The CPU index of the CPU whose receive thread is to be destroyed | |
8976f424 RL |
1063 | * |
1064 | * Destroys a per-CPU Rx thread. Any pending skbs are moved to the | |
1065 | * current CPU's Rx thread. If the thread being destroyed is bound to | |
1066 | * the CPU processing this context the skbs will be freed. | |
1067 | */ | |
1068 | static void fcoe_percpu_thread_destroy(unsigned int cpu) | |
1069 | { | |
1070 | struct fcoe_percpu_s *p; | |
1071 | struct task_struct *thread; | |
1072 | struct page *crc_eof; | |
1073 | struct sk_buff *skb; | |
1074 | #ifdef CONFIG_SMP | |
1075 | struct fcoe_percpu_s *p0; | |
1076 | unsigned targ_cpu = smp_processor_id(); | |
1077 | #endif /* CONFIG_SMP */ | |
1078 | ||
d5488eb9 | 1079 | FCOE_DBG("Destroying receive thread for CPU %d\n", cpu); |
8976f424 RL |
1080 | |
1081 | /* Prevent any new skbs from being queued for this CPU. */ | |
1082 | p = &per_cpu(fcoe_percpu, cpu); | |
1083 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1084 | thread = p->thread; | |
1085 | p->thread = NULL; | |
1086 | crc_eof = p->crc_eof_page; | |
1087 | p->crc_eof_page = NULL; | |
1088 | p->crc_eof_offset = 0; | |
1089 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1090 | ||
1091 | #ifdef CONFIG_SMP | |
1092 | /* | |
1093 | * Don't bother moving the skb's if this context is running | |
1094 | * on the same CPU that is having its thread destroyed. This | |
1095 | * can easily happen when the module is removed. | |
1096 | */ | |
1097 | if (cpu != targ_cpu) { | |
1098 | p0 = &per_cpu(fcoe_percpu, targ_cpu); | |
1099 | spin_lock_bh(&p0->fcoe_rx_list.lock); | |
1100 | if (p0->thread) { | |
d5488eb9 RL |
1101 | FCOE_DBG("Moving frames from CPU %d to CPU %d\n", |
1102 | cpu, targ_cpu); | |
8976f424 RL |
1103 | |
1104 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1105 | __skb_queue_tail(&p0->fcoe_rx_list, skb); | |
1106 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
1107 | } else { | |
1108 | /* | |
1109 | * The targeted CPU is not initialized and cannot accept | |
1875f27e | 1110 | * new skbs. Unlock the targeted CPU and drop the skbs |
8976f424 RL |
1111 | * on the CPU that is going offline. |
1112 | */ | |
1113 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1114 | kfree_skb(skb); | |
1115 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
1116 | } | |
1117 | } else { | |
1118 | /* | |
1119 | * This scenario occurs when the module is being removed | |
1120 | * and all threads are being destroyed. skbs will continue | |
1121 | * to be shifted from the CPU thread that is being removed | |
1122 | * to the CPU thread associated with the CPU that is processing | |
1123 | * the module removal. Once there is only one CPU Rx thread it | |
1124 | * will reach this case and we will drop all skbs and later | |
1125 | * stop the thread. | |
1126 | */ | |
1127 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1128 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1129 | kfree_skb(skb); | |
1130 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1131 | } | |
1132 | #else | |
1133 | /* | |
dd3fd72e | 1134 | * This a non-SMP scenario where the singular Rx thread is |
8976f424 RL |
1135 | * being removed. Free all skbs and stop the thread. |
1136 | */ | |
1137 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1138 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1139 | kfree_skb(skb); | |
1140 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1141 | #endif | |
1142 | ||
1143 | if (thread) | |
1144 | kthread_stop(thread); | |
1145 | ||
1146 | if (crc_eof) | |
1147 | put_page(crc_eof); | |
1148 | } | |
1149 | ||
1150 | /** | |
1875f27e RL |
1151 | * fcoe_cpu_callback() - Handler for CPU hotplug events |
1152 | * @nfb: The callback data block | |
1153 | * @action: The event triggering the callback | |
1154 | * @hcpu: The index of the CPU that the event is for | |
8976f424 | 1155 | * |
1875f27e | 1156 | * This creates or destroys per-CPU data for fcoe |
8976f424 RL |
1157 | * |
1158 | * Returns NOTIFY_OK always. | |
1159 | */ | |
1160 | static int fcoe_cpu_callback(struct notifier_block *nfb, | |
1161 | unsigned long action, void *hcpu) | |
1162 | { | |
1163 | unsigned cpu = (unsigned long)hcpu; | |
1164 | ||
1165 | switch (action) { | |
1166 | case CPU_ONLINE: | |
1167 | case CPU_ONLINE_FROZEN: | |
d5488eb9 | 1168 | FCOE_DBG("CPU %x online: Create Rx thread\n", cpu); |
8976f424 RL |
1169 | fcoe_percpu_thread_create(cpu); |
1170 | break; | |
1171 | case CPU_DEAD: | |
1172 | case CPU_DEAD_FROZEN: | |
d5488eb9 | 1173 | FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu); |
8976f424 RL |
1174 | fcoe_percpu_thread_destroy(cpu); |
1175 | break; | |
1176 | default: | |
1177 | break; | |
1178 | } | |
1179 | return NOTIFY_OK; | |
1180 | } | |
1181 | ||
85b4aa49 | 1182 | /** |
1875f27e RL |
1183 | * fcoe_rcv() - Receive packets from a net device |
1184 | * @skb: The received packet | |
1185 | * @netdev: The net device that the packet was received on | |
1186 | * @ptype: The packet type context | |
1187 | * @olddev: The last device net device | |
85b4aa49 | 1188 | * |
1875f27e RL |
1189 | * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a |
1190 | * FC frame and passes the frame to libfc. | |
85b4aa49 RL |
1191 | * |
1192 | * Returns: 0 for success | |
34f42a07 | 1193 | */ |
1875f27e | 1194 | int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, |
85b4aa49 RL |
1195 | struct packet_type *ptype, struct net_device *olddev) |
1196 | { | |
1875f27e | 1197 | struct fc_lport *lport; |
85b4aa49 | 1198 | struct fcoe_rcv_info *fr; |
259ad85d | 1199 | struct fcoe_interface *fcoe; |
85b4aa49 | 1200 | struct fc_frame_header *fh; |
85b4aa49 | 1201 | struct fcoe_percpu_s *fps; |
b2f0091f | 1202 | unsigned int cpu; |
85b4aa49 | 1203 | |
259ad85d | 1204 | fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); |
1875f27e RL |
1205 | lport = fcoe->ctlr.lp; |
1206 | if (unlikely(!lport)) { | |
1207 | FCOE_NETDEV_DBG(netdev, "Cannot find hba structure"); | |
85b4aa49 RL |
1208 | goto err2; |
1209 | } | |
1875f27e | 1210 | if (!lport->link_up) |
97c8389d | 1211 | goto err2; |
85b4aa49 | 1212 | |
1875f27e | 1213 | FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p " |
d5488eb9 RL |
1214 | "data:%p tail:%p end:%p sum:%d dev:%s", |
1215 | skb->len, skb->data_len, skb->head, skb->data, | |
1216 | skb_tail_pointer(skb), skb_end_pointer(skb), | |
1217 | skb->csum, skb->dev ? skb->dev->name : "<NULL>"); | |
85b4aa49 RL |
1218 | |
1219 | /* check for FCOE packet type */ | |
1220 | if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) { | |
1875f27e | 1221 | FCOE_NETDEV_DBG(netdev, "Wrong FC type frame"); |
85b4aa49 RL |
1222 | goto err; |
1223 | } | |
1224 | ||
1225 | /* | |
1226 | * Check for minimum frame length, and make sure required FCoE | |
1227 | * and FC headers are pulled into the linear data area. | |
1228 | */ | |
1229 | if (unlikely((skb->len < FCOE_MIN_FRAME) || | |
1875f27e | 1230 | !pskb_may_pull(skb, FCOE_HEADER_LEN))) |
85b4aa49 RL |
1231 | goto err; |
1232 | ||
1233 | skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); | |
1234 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1235 | ||
85b4aa49 | 1236 | fr = fcoe_dev_from_skb(skb); |
1875f27e | 1237 | fr->fr_dev = lport; |
85b4aa49 | 1238 | fr->ptype = ptype; |
5e5e92df | 1239 | |
85b4aa49 | 1240 | /* |
b2f0091f VD |
1241 | * In case the incoming frame's exchange is originated from |
1242 | * the initiator, then received frame's exchange id is ANDed | |
1243 | * with fc_cpu_mask bits to get the same cpu on which exchange | |
1244 | * was originated, otherwise just use the current cpu. | |
85b4aa49 | 1245 | */ |
b2f0091f VD |
1246 | if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) |
1247 | cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; | |
1248 | else | |
1249 | cpu = smp_processor_id(); | |
5e5e92df | 1250 | |
8976f424 | 1251 | fps = &per_cpu(fcoe_percpu, cpu); |
85b4aa49 | 1252 | spin_lock_bh(&fps->fcoe_rx_list.lock); |
8976f424 RL |
1253 | if (unlikely(!fps->thread)) { |
1254 | /* | |
1255 | * The targeted CPU is not ready, let's target | |
1256 | * the first CPU now. For non-SMP systems this | |
1257 | * will check the same CPU twice. | |
1258 | */ | |
1875f27e | 1259 | FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread " |
d5488eb9 RL |
1260 | "ready for incoming skb- using first online " |
1261 | "CPU.\n"); | |
8976f424 RL |
1262 | |
1263 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
6957177f | 1264 | cpu = cpumask_first(cpu_online_mask); |
8976f424 RL |
1265 | fps = &per_cpu(fcoe_percpu, cpu); |
1266 | spin_lock_bh(&fps->fcoe_rx_list.lock); | |
1267 | if (!fps->thread) { | |
1268 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1269 | goto err; | |
1270 | } | |
1271 | } | |
1272 | ||
1273 | /* | |
1274 | * We now have a valid CPU that we're targeting for | |
1275 | * this skb. We also have this receive thread locked, | |
1276 | * so we're free to queue skbs into it's queue. | |
1277 | */ | |
85b4aa49 | 1278 | |
859b7b64 CL |
1279 | /* If this is a SCSI-FCP frame, and this is already executing on the |
1280 | * correct CPU, and the queue for this CPU is empty, then go ahead | |
1281 | * and process the frame directly in the softirq context. | |
1282 | * This lets us process completions without context switching from the | |
1283 | * NET_RX softirq, to our receive processing thread, and then back to | |
1284 | * BLOCK softirq context. | |
1285 | */ | |
1286 | if (fh->fh_type == FC_TYPE_FCP && | |
1287 | cpu == smp_processor_id() && | |
1288 | skb_queue_empty(&fps->fcoe_rx_list)) { | |
1289 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1290 | fcoe_recv_frame(skb); | |
1291 | } else { | |
1292 | __skb_queue_tail(&fps->fcoe_rx_list, skb); | |
1293 | if (fps->fcoe_rx_list.qlen == 1) | |
1294 | wake_up_process(fps->thread); | |
1295 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1296 | } | |
85b4aa49 RL |
1297 | |
1298 | return 0; | |
1299 | err: | |
1875f27e | 1300 | fc_lport_get_stats(lport)->ErrorFrames++; |
85b4aa49 RL |
1301 | |
1302 | err2: | |
1303 | kfree_skb(skb); | |
1304 | return -1; | |
1305 | } | |
85b4aa49 RL |
1306 | |
1307 | /** | |
1875f27e RL |
1308 | * fcoe_start_io() - Start FCoE I/O |
1309 | * @skb: The packet to be transmitted | |
1310 | * | |
1311 | * This routine is called from the net device to start transmitting | |
1312 | * FCoE packets. | |
85b4aa49 RL |
1313 | * |
1314 | * Returns: 0 for success | |
34f42a07 | 1315 | */ |
85b4aa49 RL |
1316 | static inline int fcoe_start_io(struct sk_buff *skb) |
1317 | { | |
18fa11ef | 1318 | struct sk_buff *nskb; |
85b4aa49 RL |
1319 | int rc; |
1320 | ||
18fa11ef CL |
1321 | nskb = skb_clone(skb, GFP_ATOMIC); |
1322 | rc = dev_queue_xmit(nskb); | |
85b4aa49 RL |
1323 | if (rc != 0) |
1324 | return rc; | |
1325 | kfree_skb(skb); | |
1326 | return 0; | |
1327 | } | |
1328 | ||
1329 | /** | |
1875f27e RL |
1330 | * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC |
1331 | * @skb: The packet to be transmitted | |
1332 | * @tlen: The total length of the trailer | |
1333 | * | |
1334 | * This routine allocates a page for frame trailers. The page is re-used if | |
1335 | * there is enough room left on it for the current trailer. If there isn't | |
1336 | * enough buffer left a new page is allocated for the trailer. Reference to | |
1337 | * the page from this function as well as the skbs using the page fragments | |
1338 | * ensure that the page is freed at the appropriate time. | |
85b4aa49 RL |
1339 | * |
1340 | * Returns: 0 for success | |
34f42a07 | 1341 | */ |
85b4aa49 RL |
1342 | static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen) |
1343 | { | |
1344 | struct fcoe_percpu_s *fps; | |
1345 | struct page *page; | |
85b4aa49 | 1346 | |
5e5e92df | 1347 | fps = &get_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1348 | page = fps->crc_eof_page; |
1349 | if (!page) { | |
1350 | page = alloc_page(GFP_ATOMIC); | |
1351 | if (!page) { | |
5e5e92df | 1352 | put_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1353 | return -ENOMEM; |
1354 | } | |
1355 | fps->crc_eof_page = page; | |
8976f424 | 1356 | fps->crc_eof_offset = 0; |
85b4aa49 RL |
1357 | } |
1358 | ||
1359 | get_page(page); | |
1360 | skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page, | |
1361 | fps->crc_eof_offset, tlen); | |
1362 | skb->len += tlen; | |
1363 | skb->data_len += tlen; | |
1364 | skb->truesize += tlen; | |
1365 | fps->crc_eof_offset += sizeof(struct fcoe_crc_eof); | |
1366 | ||
1367 | if (fps->crc_eof_offset >= PAGE_SIZE) { | |
1368 | fps->crc_eof_page = NULL; | |
1369 | fps->crc_eof_offset = 0; | |
1370 | put_page(page); | |
1371 | } | |
5e5e92df | 1372 | put_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1373 | return 0; |
1374 | } | |
1375 | ||
1376 | /** | |
1875f27e RL |
1377 | * fcoe_fc_crc() - Calculates the CRC for a given frame |
1378 | * @fp: The frame to be checksumed | |
85b4aa49 | 1379 | * |
1875f27e RL |
1380 | * This uses crc32() routine to calculate the CRC for a frame |
1381 | * | |
1382 | * Return: The 32 bit CRC value | |
34f42a07 | 1383 | */ |
85b4aa49 RL |
1384 | u32 fcoe_fc_crc(struct fc_frame *fp) |
1385 | { | |
1386 | struct sk_buff *skb = fp_skb(fp); | |
1387 | struct skb_frag_struct *frag; | |
1388 | unsigned char *data; | |
1389 | unsigned long off, len, clen; | |
1390 | u32 crc; | |
1391 | unsigned i; | |
1392 | ||
1393 | crc = crc32(~0, skb->data, skb_headlen(skb)); | |
1394 | ||
1395 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1396 | frag = &skb_shinfo(skb)->frags[i]; | |
1397 | off = frag->page_offset; | |
1398 | len = frag->size; | |
1399 | while (len > 0) { | |
1400 | clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK)); | |
1401 | data = kmap_atomic(frag->page + (off >> PAGE_SHIFT), | |
1402 | KM_SKB_DATA_SOFTIRQ); | |
1403 | crc = crc32(crc, data + (off & ~PAGE_MASK), clen); | |
1404 | kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ); | |
1405 | off += clen; | |
1406 | len -= clen; | |
1407 | } | |
1408 | } | |
1409 | return crc; | |
1410 | } | |
85b4aa49 RL |
1411 | |
1412 | /** | |
1875f27e RL |
1413 | * fcoe_xmit() - Transmit a FCoE frame |
1414 | * @lport: The local port that the frame is to be transmitted for | |
1415 | * @fp: The frame to be transmitted | |
85b4aa49 | 1416 | * |
1875f27e | 1417 | * Return: 0 for success |
34f42a07 | 1418 | */ |
1875f27e | 1419 | int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) |
85b4aa49 | 1420 | { |
4bb6b515 | 1421 | int wlen; |
85b4aa49 RL |
1422 | u32 crc; |
1423 | struct ethhdr *eh; | |
1424 | struct fcoe_crc_eof *cp; | |
1425 | struct sk_buff *skb; | |
1426 | struct fcoe_dev_stats *stats; | |
1427 | struct fc_frame_header *fh; | |
1428 | unsigned int hlen; /* header length implies the version */ | |
1429 | unsigned int tlen; /* trailer length */ | |
1430 | unsigned int elen; /* eth header, may include vlan */ | |
1875f27e | 1431 | struct fcoe_port *port = lport_priv(lport); |
3fe9a0ba | 1432 | struct fcoe_interface *fcoe = port->fcoe; |
85b4aa49 RL |
1433 | u8 sof, eof; |
1434 | struct fcoe_hdr *hp; | |
1435 | ||
1436 | WARN_ON((fr_len(fp) % sizeof(u32)) != 0); | |
1437 | ||
85b4aa49 | 1438 | fh = fc_frame_header_get(fp); |
97c8389d JE |
1439 | skb = fp_skb(fp); |
1440 | wlen = skb->len / FCOE_WORD_TO_BYTE; | |
1441 | ||
1875f27e | 1442 | if (!lport->link_up) { |
3caf02ee | 1443 | kfree_skb(skb); |
97c8389d | 1444 | return 0; |
85b4aa49 RL |
1445 | } |
1446 | ||
97c8389d | 1447 | if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) && |
1875f27e | 1448 | fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb)) |
97c8389d JE |
1449 | return 0; |
1450 | ||
85b4aa49 RL |
1451 | sof = fr_sof(fp); |
1452 | eof = fr_eof(fp); | |
1453 | ||
4e57e1cb | 1454 | elen = sizeof(struct ethhdr); |
85b4aa49 RL |
1455 | hlen = sizeof(struct fcoe_hdr); |
1456 | tlen = sizeof(struct fcoe_crc_eof); | |
1457 | wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; | |
1458 | ||
1459 | /* crc offload */ | |
1875f27e | 1460 | if (likely(lport->crc_offload)) { |
39ca9a06 | 1461 | skb->ip_summed = CHECKSUM_PARTIAL; |
85b4aa49 RL |
1462 | skb->csum_start = skb_headroom(skb); |
1463 | skb->csum_offset = skb->len; | |
1464 | crc = 0; | |
1465 | } else { | |
1466 | skb->ip_summed = CHECKSUM_NONE; | |
1467 | crc = fcoe_fc_crc(fp); | |
1468 | } | |
1469 | ||
014f5c3f | 1470 | /* copy port crc and eof to the skb buff */ |
85b4aa49 RL |
1471 | if (skb_is_nonlinear(skb)) { |
1472 | skb_frag_t *frag; | |
1473 | if (fcoe_get_paged_crc_eof(skb, tlen)) { | |
e9041581 | 1474 | kfree_skb(skb); |
85b4aa49 RL |
1475 | return -ENOMEM; |
1476 | } | |
1477 | frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; | |
1478 | cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ) | |
1479 | + frag->page_offset; | |
1480 | } else { | |
1481 | cp = (struct fcoe_crc_eof *)skb_put(skb, tlen); | |
1482 | } | |
1483 | ||
1484 | memset(cp, 0, sizeof(*cp)); | |
1485 | cp->fcoe_eof = eof; | |
1486 | cp->fcoe_crc32 = cpu_to_le32(~crc); | |
1487 | ||
1488 | if (skb_is_nonlinear(skb)) { | |
1489 | kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ); | |
1490 | cp = NULL; | |
1491 | } | |
1492 | ||
014f5c3f | 1493 | /* adjust skb network/transport offsets to match mac/fcoe/port */ |
85b4aa49 RL |
1494 | skb_push(skb, elen + hlen); |
1495 | skb_reset_mac_header(skb); | |
1496 | skb_reset_network_header(skb); | |
1497 | skb->mac_len = elen; | |
211c738d | 1498 | skb->protocol = htons(ETH_P_FCOE); |
3fe9a0ba | 1499 | skb->dev = fcoe->netdev; |
85b4aa49 RL |
1500 | |
1501 | /* fill up mac and fcoe headers */ | |
1502 | eh = eth_hdr(skb); | |
1503 | eh->h_proto = htons(ETH_P_FCOE); | |
3fe9a0ba | 1504 | if (fcoe->ctlr.map_dest) |
85b4aa49 RL |
1505 | fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id); |
1506 | else | |
1507 | /* insert GW address */ | |
3fe9a0ba | 1508 | memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN); |
85b4aa49 | 1509 | |
3fe9a0ba CL |
1510 | if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN)) |
1511 | memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN); | |
85b4aa49 | 1512 | else |
11b56188 | 1513 | memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); |
85b4aa49 RL |
1514 | |
1515 | hp = (struct fcoe_hdr *)(eh + 1); | |
1516 | memset(hp, 0, sizeof(*hp)); | |
1517 | if (FC_FCOE_VER) | |
1518 | FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); | |
1519 | hp->fcoe_sof = sof; | |
1520 | ||
39ca9a06 | 1521 | /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ |
1875f27e | 1522 | if (lport->seq_offload && fr_max_payload(fp)) { |
39ca9a06 YZ |
1523 | skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; |
1524 | skb_shinfo(skb)->gso_size = fr_max_payload(fp); | |
1525 | } else { | |
1526 | skb_shinfo(skb)->gso_type = 0; | |
1527 | skb_shinfo(skb)->gso_size = 0; | |
1528 | } | |
85b4aa49 | 1529 | /* update tx stats: regardless if LLD fails */ |
1875f27e | 1530 | stats = fc_lport_get_stats(lport); |
582b45bc RL |
1531 | stats->TxFrames++; |
1532 | stats->TxWords += wlen; | |
85b4aa49 RL |
1533 | |
1534 | /* send down to lld */ | |
1875f27e | 1535 | fr_dev(fp) = lport; |
014f5c3f | 1536 | if (port->fcoe_pending_queue.qlen) |
1875f27e | 1537 | fcoe_check_wait_queue(lport, skb); |
4bb6b515 | 1538 | else if (fcoe_start_io(skb)) |
1875f27e | 1539 | fcoe_check_wait_queue(lport, skb); |
85b4aa49 RL |
1540 | |
1541 | return 0; | |
1542 | } | |
85b4aa49 | 1543 | |
e7a51997 | 1544 | /** |
1875f27e RL |
1545 | * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion |
1546 | * @skb: The completed skb (argument required by destructor) | |
e7a51997 JE |
1547 | */ |
1548 | static void fcoe_percpu_flush_done(struct sk_buff *skb) | |
1549 | { | |
1550 | complete(&fcoe_flush_completion); | |
1551 | } | |
1552 | ||
34f42a07 | 1553 | /** |
859b7b64 CL |
1554 | * fcoe_recv_frame() - process a single received frame |
1555 | * @skb: frame to process | |
85b4aa49 | 1556 | */ |
859b7b64 | 1557 | static void fcoe_recv_frame(struct sk_buff *skb) |
85b4aa49 | 1558 | { |
85b4aa49 | 1559 | u32 fr_len; |
1875f27e | 1560 | struct fc_lport *lport; |
85b4aa49 RL |
1561 | struct fcoe_rcv_info *fr; |
1562 | struct fcoe_dev_stats *stats; | |
1563 | struct fc_frame_header *fh; | |
85b4aa49 RL |
1564 | struct fcoe_crc_eof crc_eof; |
1565 | struct fc_frame *fp; | |
1566 | u8 *mac = NULL; | |
014f5c3f | 1567 | struct fcoe_port *port; |
85b4aa49 RL |
1568 | struct fcoe_hdr *hp; |
1569 | ||
859b7b64 CL |
1570 | fr = fcoe_dev_from_skb(skb); |
1571 | lport = fr->fr_dev; | |
1572 | if (unlikely(!lport)) { | |
1573 | if (skb->destructor != fcoe_percpu_flush_done) | |
1574 | FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb"); | |
1575 | kfree_skb(skb); | |
1576 | return; | |
1577 | } | |
1578 | ||
1579 | FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d " | |
1580 | "head:%p data:%p tail:%p end:%p sum:%d dev:%s", | |
1581 | skb->len, skb->data_len, | |
1582 | skb->head, skb->data, skb_tail_pointer(skb), | |
1583 | skb_end_pointer(skb), skb->csum, | |
1584 | skb->dev ? skb->dev->name : "<NULL>"); | |
1585 | ||
1586 | /* | |
1587 | * Save source MAC address before discarding header. | |
1588 | */ | |
1589 | port = lport_priv(lport); | |
1590 | if (skb_is_nonlinear(skb)) | |
1591 | skb_linearize(skb); /* not ideal */ | |
1592 | mac = eth_hdr(skb)->h_source; | |
1593 | ||
1594 | /* | |
1595 | * Frame length checks and setting up the header pointers | |
1596 | * was done in fcoe_rcv already. | |
1597 | */ | |
1598 | hp = (struct fcoe_hdr *) skb_network_header(skb); | |
1599 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1600 | ||
1601 | stats = fc_lport_get_stats(lport); | |
1602 | if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { | |
1603 | if (stats->ErrorFrames < 5) | |
1604 | printk(KERN_WARNING "fcoe: FCoE version " | |
1605 | "mismatch: The frame has " | |
1606 | "version %x, but the " | |
1607 | "initiator supports version " | |
1608 | "%x\n", FC_FCOE_DECAPS_VER(hp), | |
1609 | FC_FCOE_VER); | |
1610 | stats->ErrorFrames++; | |
1611 | kfree_skb(skb); | |
1612 | return; | |
1613 | } | |
1614 | ||
1615 | skb_pull(skb, sizeof(struct fcoe_hdr)); | |
1616 | fr_len = skb->len - sizeof(struct fcoe_crc_eof); | |
1617 | ||
1618 | stats->RxFrames++; | |
1619 | stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; | |
1620 | ||
1621 | fp = (struct fc_frame *)skb; | |
1622 | fc_frame_init(fp); | |
1623 | fr_dev(fp) = lport; | |
1624 | fr_sof(fp) = hp->fcoe_sof; | |
1625 | ||
1626 | /* Copy out the CRC and EOF trailer for access */ | |
1627 | if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) { | |
1628 | kfree_skb(skb); | |
1629 | return; | |
1630 | } | |
1631 | fr_eof(fp) = crc_eof.fcoe_eof; | |
1632 | fr_crc(fp) = crc_eof.fcoe_crc32; | |
1633 | if (pskb_trim(skb, fr_len)) { | |
1634 | kfree_skb(skb); | |
1635 | return; | |
1636 | } | |
1637 | ||
1638 | /* | |
1639 | * We only check CRC if no offload is available and if it is | |
1640 | * it's solicited data, in which case, the FCP layer would | |
1641 | * check it during the copy. | |
1642 | */ | |
1643 | if (lport->crc_offload && | |
1644 | skb->ip_summed == CHECKSUM_UNNECESSARY) | |
1645 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; | |
1646 | else | |
1647 | fr_flags(fp) |= FCPHF_CRC_UNCHECKED; | |
1648 | ||
1649 | fh = fc_frame_header_get(fp); | |
1650 | if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && | |
1651 | fh->fh_type == FC_TYPE_FCP) { | |
1652 | fc_exch_recv(lport, fp); | |
1653 | return; | |
1654 | } | |
1655 | if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) { | |
1656 | if (le32_to_cpu(fr_crc(fp)) != | |
1657 | ~crc32(~0, skb->data, fr_len)) { | |
1658 | if (stats->InvalidCRCCount < 5) | |
1659 | printk(KERN_WARNING "fcoe: dropping " | |
1660 | "frame with CRC error\n"); | |
1661 | stats->InvalidCRCCount++; | |
1662 | stats->ErrorFrames++; | |
1663 | fc_frame_free(fp); | |
1664 | return; | |
1665 | } | |
1666 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; | |
1667 | } | |
1668 | fc_exch_recv(lport, fp); | |
1669 | } | |
1670 | ||
1671 | /** | |
1672 | * fcoe_percpu_receive_thread() - The per-CPU packet receive thread | |
1673 | * @arg: The per-CPU context | |
1674 | * | |
1675 | * Return: 0 for success | |
1676 | */ | |
1677 | int fcoe_percpu_receive_thread(void *arg) | |
1678 | { | |
1679 | struct fcoe_percpu_s *p = arg; | |
1680 | struct sk_buff *skb; | |
1681 | ||
4469c195 | 1682 | set_user_nice(current, -20); |
85b4aa49 RL |
1683 | |
1684 | while (!kthread_should_stop()) { | |
1685 | ||
1686 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1687 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) { | |
1688 | set_current_state(TASK_INTERRUPTIBLE); | |
1689 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1690 | schedule(); | |
1691 | set_current_state(TASK_RUNNING); | |
1692 | if (kthread_should_stop()) | |
1693 | return 0; | |
1694 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1695 | } | |
1696 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
859b7b64 | 1697 | fcoe_recv_frame(skb); |
85b4aa49 RL |
1698 | } |
1699 | return 0; | |
1700 | } | |
1701 | ||
85b4aa49 | 1702 | /** |
1875f27e RL |
1703 | * fcoe_check_wait_queue() - Attempt to clear the transmit backlog |
1704 | * @lport: The local port whose backlog is to be cleared | |
85b4aa49 | 1705 | * |
1875f27e RL |
1706 | * This empties the wait_queue, dequeues the head of the wait_queue queue |
1707 | * and calls fcoe_start_io() for each packet. If all skb have been | |
1708 | * transmitted it returns the qlen. If an error occurs it restores | |
1709 | * wait_queue (to try again later) and returns -1. | |
85b4aa49 | 1710 | * |
1875f27e RL |
1711 | * The wait_queue is used when the skb transmit fails. The failed skb |
1712 | * will go in the wait_queue which will be emptied by the timer function or | |
85b4aa49 | 1713 | * by the next skb transmit. |
34f42a07 | 1714 | */ |
1875f27e | 1715 | static void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb) |
85b4aa49 | 1716 | { |
1875f27e | 1717 | struct fcoe_port *port = lport_priv(lport); |
4bb6b515 | 1718 | int rc; |
85b4aa49 | 1719 | |
014f5c3f | 1720 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
4bb6b515 VD |
1721 | |
1722 | if (skb) | |
014f5c3f | 1723 | __skb_queue_tail(&port->fcoe_pending_queue, skb); |
4bb6b515 | 1724 | |
014f5c3f | 1725 | if (port->fcoe_pending_queue_active) |
c826a314 | 1726 | goto out; |
014f5c3f | 1727 | port->fcoe_pending_queue_active = 1; |
55c8bafb | 1728 | |
014f5c3f | 1729 | while (port->fcoe_pending_queue.qlen) { |
55c8bafb | 1730 | /* keep qlen > 0 until fcoe_start_io succeeds */ |
014f5c3f CL |
1731 | port->fcoe_pending_queue.qlen++; |
1732 | skb = __skb_dequeue(&port->fcoe_pending_queue); | |
55c8bafb | 1733 | |
014f5c3f | 1734 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
55c8bafb | 1735 | rc = fcoe_start_io(skb); |
014f5c3f | 1736 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
55c8bafb CL |
1737 | |
1738 | if (rc) { | |
014f5c3f | 1739 | __skb_queue_head(&port->fcoe_pending_queue, skb); |
55c8bafb | 1740 | /* undo temporary increment above */ |
014f5c3f | 1741 | port->fcoe_pending_queue.qlen--; |
55c8bafb | 1742 | break; |
85b4aa49 | 1743 | } |
55c8bafb | 1744 | /* undo temporary increment above */ |
014f5c3f | 1745 | port->fcoe_pending_queue.qlen--; |
85b4aa49 | 1746 | } |
55c8bafb | 1747 | |
014f5c3f | 1748 | if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH) |
1875f27e | 1749 | lport->qfull = 0; |
014f5c3f CL |
1750 | if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer)) |
1751 | mod_timer(&port->timer, jiffies + 2); | |
1752 | port->fcoe_pending_queue_active = 0; | |
c826a314 | 1753 | out: |
014f5c3f | 1754 | if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH) |
1875f27e | 1755 | lport->qfull = 1; |
014f5c3f | 1756 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
4bb6b515 | 1757 | return; |
85b4aa49 RL |
1758 | } |
1759 | ||
85b4aa49 | 1760 | /** |
1875f27e | 1761 | * fcoe_dev_setup() - Setup the link change notification interface |
34f42a07 | 1762 | */ |
b0d428ad | 1763 | static void fcoe_dev_setup(void) |
85b4aa49 | 1764 | { |
85b4aa49 RL |
1765 | register_netdevice_notifier(&fcoe_notifier); |
1766 | } | |
1767 | ||
1768 | /** | |
1875f27e | 1769 | * fcoe_dev_cleanup() - Cleanup the link change notification interface |
34f42a07 | 1770 | */ |
85b4aa49 RL |
1771 | static void fcoe_dev_cleanup(void) |
1772 | { | |
1773 | unregister_netdevice_notifier(&fcoe_notifier); | |
1774 | } | |
1775 | ||
1776 | /** | |
1875f27e RL |
1777 | * fcoe_device_notification() - Handler for net device events |
1778 | * @notifier: The context of the notification | |
1779 | * @event: The type of event | |
1780 | * @ptr: The net device that the event was on | |
85b4aa49 | 1781 | * |
1875f27e | 1782 | * This function is called by the Ethernet driver in case of link change event. |
85b4aa49 RL |
1783 | * |
1784 | * Returns: 0 for success | |
34f42a07 | 1785 | */ |
85b4aa49 RL |
1786 | static int fcoe_device_notification(struct notifier_block *notifier, |
1787 | ulong event, void *ptr) | |
1788 | { | |
1875f27e | 1789 | struct fc_lport *lport = NULL; |
1d1b88dc | 1790 | struct net_device *netdev = ptr; |
014f5c3f | 1791 | struct fcoe_interface *fcoe; |
2e70e241 | 1792 | struct fcoe_port *port; |
85b4aa49 | 1793 | struct fcoe_dev_stats *stats; |
97c8389d | 1794 | u32 link_possible = 1; |
85b4aa49 RL |
1795 | u32 mfs; |
1796 | int rc = NOTIFY_OK; | |
1797 | ||
014f5c3f | 1798 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
25024989 | 1799 | if (fcoe->netdev == netdev) { |
1875f27e | 1800 | lport = fcoe->ctlr.lp; |
85b4aa49 RL |
1801 | break; |
1802 | } | |
1803 | } | |
1875f27e | 1804 | if (!lport) { |
85b4aa49 RL |
1805 | rc = NOTIFY_DONE; |
1806 | goto out; | |
1807 | } | |
1808 | ||
85b4aa49 RL |
1809 | switch (event) { |
1810 | case NETDEV_DOWN: | |
1811 | case NETDEV_GOING_DOWN: | |
97c8389d | 1812 | link_possible = 0; |
85b4aa49 RL |
1813 | break; |
1814 | case NETDEV_UP: | |
1815 | case NETDEV_CHANGE: | |
85b4aa49 RL |
1816 | break; |
1817 | case NETDEV_CHANGEMTU: | |
7221d7e5 YZ |
1818 | if (netdev->features & NETIF_F_FCOE_MTU) |
1819 | break; | |
1d1b88dc VD |
1820 | mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + |
1821 | sizeof(struct fcoe_crc_eof)); | |
85b4aa49 | 1822 | if (mfs >= FC_MIN_MAX_FRAME) |
1875f27e | 1823 | fc_set_mfs(lport, mfs); |
85b4aa49 RL |
1824 | break; |
1825 | case NETDEV_REGISTER: | |
1826 | break; | |
2e70e241 CL |
1827 | case NETDEV_UNREGISTER: |
1828 | list_del(&fcoe->list); | |
1829 | port = lport_priv(fcoe->ctlr.lp); | |
1830 | fcoe_interface_cleanup(fcoe); | |
1831 | schedule_work(&port->destroy_work); | |
1832 | goto out; | |
1833 | break; | |
85b4aa49 | 1834 | default: |
1d1b88dc | 1835 | FCOE_NETDEV_DBG(netdev, "Unknown event %ld " |
d5488eb9 | 1836 | "from netdev netlink\n", event); |
85b4aa49 | 1837 | } |
1875f27e | 1838 | if (link_possible && !fcoe_link_ok(lport)) |
3fe9a0ba CL |
1839 | fcoe_ctlr_link_up(&fcoe->ctlr); |
1840 | else if (fcoe_ctlr_link_down(&fcoe->ctlr)) { | |
1875f27e | 1841 | stats = fc_lport_get_stats(lport); |
97c8389d | 1842 | stats->LinkFailureCount++; |
1875f27e | 1843 | fcoe_clean_pending_queue(lport); |
85b4aa49 RL |
1844 | } |
1845 | out: | |
1846 | return rc; | |
1847 | } | |
1848 | ||
1849 | /** | |
1875f27e RL |
1850 | * fcoe_if_to_netdev() - Parse a name buffer to get a net device |
1851 | * @buffer: The name of the net device | |
85b4aa49 | 1852 | * |
1875f27e | 1853 | * Returns: NULL or a ptr to net_device |
34f42a07 | 1854 | */ |
85b4aa49 RL |
1855 | static struct net_device *fcoe_if_to_netdev(const char *buffer) |
1856 | { | |
1857 | char *cp; | |
1858 | char ifname[IFNAMSIZ + 2]; | |
1859 | ||
1860 | if (buffer) { | |
1861 | strlcpy(ifname, buffer, IFNAMSIZ); | |
1862 | cp = ifname + strlen(ifname); | |
1863 | while (--cp >= ifname && *cp == '\n') | |
1864 | *cp = '\0'; | |
1865 | return dev_get_by_name(&init_net, ifname); | |
1866 | } | |
1867 | return NULL; | |
1868 | } | |
1869 | ||
55a66d3c VD |
1870 | /** |
1871 | * fcoe_disable() - Disables a FCoE interface | |
1872 | * @buffer: The name of the Ethernet interface to be disabled | |
1873 | * @kp: The associated kernel parameter | |
1874 | * | |
1875 | * Called from sysfs. | |
1876 | * | |
1877 | * Returns: 0 for success | |
1878 | */ | |
1879 | static int fcoe_disable(const char *buffer, struct kernel_param *kp) | |
1880 | { | |
1881 | struct fcoe_interface *fcoe; | |
1882 | struct net_device *netdev; | |
1883 | int rc = 0; | |
1884 | ||
1885 | mutex_lock(&fcoe_config_mutex); | |
1886 | #ifdef CONFIG_FCOE_MODULE | |
1887 | /* | |
1888 | * Make sure the module has been initialized, and is not about to be | |
1889 | * removed. Module paramter sysfs files are writable before the | |
1890 | * module_init function is called and after module_exit. | |
1891 | */ | |
1892 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
1893 | rc = -ENODEV; | |
1894 | goto out_nodev; | |
1895 | } | |
1896 | #endif | |
1897 | ||
1898 | netdev = fcoe_if_to_netdev(buffer); | |
1899 | if (!netdev) { | |
1900 | rc = -ENODEV; | |
1901 | goto out_nodev; | |
1902 | } | |
1903 | ||
1904 | rtnl_lock(); | |
1905 | fcoe = fcoe_hostlist_lookup_port(netdev); | |
1906 | rtnl_unlock(); | |
1907 | ||
1908 | if (fcoe) | |
1909 | fc_fabric_logoff(fcoe->ctlr.lp); | |
1910 | else | |
1911 | rc = -ENODEV; | |
1912 | ||
1913 | dev_put(netdev); | |
1914 | out_nodev: | |
1915 | mutex_unlock(&fcoe_config_mutex); | |
1916 | return rc; | |
1917 | } | |
1918 | ||
1919 | /** | |
1920 | * fcoe_enable() - Enables a FCoE interface | |
1921 | * @buffer: The name of the Ethernet interface to be enabled | |
1922 | * @kp: The associated kernel parameter | |
1923 | * | |
1924 | * Called from sysfs. | |
1925 | * | |
1926 | * Returns: 0 for success | |
1927 | */ | |
1928 | static int fcoe_enable(const char *buffer, struct kernel_param *kp) | |
1929 | { | |
1930 | struct fcoe_interface *fcoe; | |
1931 | struct net_device *netdev; | |
1932 | int rc = 0; | |
1933 | ||
1934 | mutex_lock(&fcoe_config_mutex); | |
1935 | #ifdef CONFIG_FCOE_MODULE | |
1936 | /* | |
1937 | * Make sure the module has been initialized, and is not about to be | |
1938 | * removed. Module paramter sysfs files are writable before the | |
1939 | * module_init function is called and after module_exit. | |
1940 | */ | |
1941 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
1942 | rc = -ENODEV; | |
1943 | goto out_nodev; | |
1944 | } | |
1945 | #endif | |
1946 | ||
1947 | netdev = fcoe_if_to_netdev(buffer); | |
1948 | if (!netdev) { | |
1949 | rc = -ENODEV; | |
1950 | goto out_nodev; | |
1951 | } | |
1952 | ||
1953 | rtnl_lock(); | |
1954 | fcoe = fcoe_hostlist_lookup_port(netdev); | |
1955 | rtnl_unlock(); | |
1956 | ||
1957 | if (fcoe) | |
1958 | rc = fc_fabric_login(fcoe->ctlr.lp); | |
1959 | else | |
1960 | rc = -ENODEV; | |
1961 | ||
1962 | dev_put(netdev); | |
1963 | out_nodev: | |
1964 | mutex_unlock(&fcoe_config_mutex); | |
1965 | return rc; | |
1966 | } | |
1967 | ||
85b4aa49 | 1968 | /** |
1875f27e RL |
1969 | * fcoe_destroy() - Destroy a FCoE interface |
1970 | * @buffer: The name of the Ethernet interface to be destroyed | |
1971 | * @kp: The associated kernel parameter | |
1972 | * | |
1973 | * Called from sysfs. | |
85b4aa49 RL |
1974 | * |
1975 | * Returns: 0 for success | |
34f42a07 | 1976 | */ |
85b4aa49 RL |
1977 | static int fcoe_destroy(const char *buffer, struct kernel_param *kp) |
1978 | { | |
030f4e00 | 1979 | struct fcoe_interface *fcoe; |
2e70e241 | 1980 | struct net_device *netdev; |
8eca355f | 1981 | int rc = 0; |
85b4aa49 | 1982 | |
dfc1d0fe CL |
1983 | mutex_lock(&fcoe_config_mutex); |
1984 | #ifdef CONFIG_FCOE_MODULE | |
1985 | /* | |
1986 | * Make sure the module has been initialized, and is not about to be | |
1987 | * removed. Module paramter sysfs files are writable before the | |
1988 | * module_init function is called and after module_exit. | |
1989 | */ | |
1990 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
1991 | rc = -ENODEV; | |
1992 | goto out_nodev; | |
1993 | } | |
1994 | #endif | |
1995 | ||
85b4aa49 RL |
1996 | netdev = fcoe_if_to_netdev(buffer); |
1997 | if (!netdev) { | |
1998 | rc = -ENODEV; | |
1999 | goto out_nodev; | |
2000 | } | |
2e70e241 | 2001 | |
090eb6c4 | 2002 | rtnl_lock(); |
2e70e241 CL |
2003 | fcoe = fcoe_hostlist_lookup_port(netdev); |
2004 | if (!fcoe) { | |
090eb6c4 | 2005 | rtnl_unlock(); |
85b4aa49 RL |
2006 | rc = -ENODEV; |
2007 | goto out_putdev; | |
2008 | } | |
2e70e241 | 2009 | list_del(&fcoe->list); |
2e70e241 CL |
2010 | fcoe_interface_cleanup(fcoe); |
2011 | rtnl_unlock(); | |
2012 | fcoe_if_destroy(fcoe->ctlr.lp); | |
6409ea65 RL |
2013 | module_put(THIS_MODULE); |
2014 | ||
85b4aa49 RL |
2015 | out_putdev: |
2016 | dev_put(netdev); | |
2017 | out_nodev: | |
dfc1d0fe | 2018 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 RL |
2019 | return rc; |
2020 | } | |
2021 | ||
1875f27e RL |
2022 | /** |
2023 | * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context | |
2024 | * @work: Handle to the FCoE port to be destroyed | |
2025 | */ | |
2e70e241 CL |
2026 | static void fcoe_destroy_work(struct work_struct *work) |
2027 | { | |
2028 | struct fcoe_port *port; | |
2029 | ||
2030 | port = container_of(work, struct fcoe_port, destroy_work); | |
2031 | mutex_lock(&fcoe_config_mutex); | |
2032 | fcoe_if_destroy(port->lport); | |
2033 | mutex_unlock(&fcoe_config_mutex); | |
2034 | } | |
2035 | ||
85b4aa49 | 2036 | /** |
1875f27e RL |
2037 | * fcoe_create() - Create a fcoe interface |
2038 | * @buffer: The name of the Ethernet interface to create on | |
2039 | * @kp: The associated kernel param | |
2040 | * | |
2041 | * Called from sysfs. | |
85b4aa49 RL |
2042 | * |
2043 | * Returns: 0 for success | |
34f42a07 | 2044 | */ |
85b4aa49 RL |
2045 | static int fcoe_create(const char *buffer, struct kernel_param *kp) |
2046 | { | |
2047 | int rc; | |
030f4e00 | 2048 | struct fcoe_interface *fcoe; |
af7f85d9 | 2049 | struct fc_lport *lport; |
85b4aa49 RL |
2050 | struct net_device *netdev; |
2051 | ||
dfc1d0fe CL |
2052 | mutex_lock(&fcoe_config_mutex); |
2053 | #ifdef CONFIG_FCOE_MODULE | |
2054 | /* | |
2055 | * Make sure the module has been initialized, and is not about to be | |
2056 | * removed. Module paramter sysfs files are writable before the | |
2057 | * module_init function is called and after module_exit. | |
2058 | */ | |
2059 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
2060 | rc = -ENODEV; | |
2061 | goto out_nodev; | |
2062 | } | |
2063 | #endif | |
2064 | ||
6409ea65 RL |
2065 | if (!try_module_get(THIS_MODULE)) { |
2066 | rc = -EINVAL; | |
2067 | goto out_nomod; | |
2068 | } | |
2069 | ||
2e70e241 | 2070 | rtnl_lock(); |
85b4aa49 RL |
2071 | netdev = fcoe_if_to_netdev(buffer); |
2072 | if (!netdev) { | |
2073 | rc = -ENODEV; | |
2074 | goto out_nodev; | |
2075 | } | |
2e70e241 | 2076 | |
85b4aa49 RL |
2077 | /* look for existing lport */ |
2078 | if (fcoe_hostlist_lookup(netdev)) { | |
2079 | rc = -EEXIST; | |
2080 | goto out_putdev; | |
2081 | } | |
85b4aa49 | 2082 | |
030f4e00 CL |
2083 | fcoe = fcoe_interface_create(netdev); |
2084 | if (!fcoe) { | |
2085 | rc = -ENOMEM; | |
2086 | goto out_putdev; | |
2087 | } | |
2088 | ||
9a05753b | 2089 | lport = fcoe_if_create(fcoe, &netdev->dev, 0); |
af7f85d9 | 2090 | if (IS_ERR(lport)) { |
d5488eb9 | 2091 | printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", |
85b4aa49 | 2092 | netdev->name); |
85b4aa49 | 2093 | rc = -EIO; |
2e70e241 | 2094 | fcoe_interface_cleanup(fcoe); |
030f4e00 | 2095 | goto out_free; |
85b4aa49 | 2096 | } |
030f4e00 | 2097 | |
54b649f8 CL |
2098 | /* Make this the "master" N_Port */ |
2099 | fcoe->ctlr.lp = lport; | |
2100 | ||
c863df33 CL |
2101 | /* add to lports list */ |
2102 | fcoe_hostlist_add(lport); | |
2103 | ||
54b649f8 CL |
2104 | /* start FIP Discovery and FLOGI */ |
2105 | lport->boot_time = jiffies; | |
2106 | fc_fabric_login(lport); | |
2107 | if (!fcoe_link_ok(lport)) | |
2108 | fcoe_ctlr_link_up(&fcoe->ctlr); | |
030f4e00 | 2109 | |
54b649f8 CL |
2110 | /* |
2111 | * Release from init in fcoe_interface_create(), on success lport | |
2112 | * should be holding a reference taken in fcoe_if_create(). | |
2113 | */ | |
030f4e00 | 2114 | fcoe_interface_put(fcoe); |
6409ea65 RL |
2115 | dev_put(netdev); |
2116 | rtnl_unlock(); | |
2117 | mutex_unlock(&fcoe_config_mutex); | |
2118 | ||
2119 | return 0; | |
2120 | out_free: | |
2121 | fcoe_interface_put(fcoe); | |
85b4aa49 RL |
2122 | out_putdev: |
2123 | dev_put(netdev); | |
2124 | out_nodev: | |
2e70e241 | 2125 | rtnl_unlock(); |
6409ea65 RL |
2126 | module_put(THIS_MODULE); |
2127 | out_nomod: | |
dfc1d0fe | 2128 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 RL |
2129 | return rc; |
2130 | } | |
2131 | ||
34f42a07 | 2132 | /** |
1875f27e RL |
2133 | * fcoe_link_ok() - Check if the link is OK for a local port |
2134 | * @lport: The local port to check link on | |
85b4aa49 RL |
2135 | * |
2136 | * Any permanently-disqualifying conditions have been previously checked. | |
2137 | * This also updates the speed setting, which may change with link for 100/1000. | |
2138 | * | |
2139 | * This function should probably be checking for PAUSE support at some point | |
2140 | * in the future. Currently Per-priority-pause is not determinable using | |
2141 | * ethtool, so we shouldn't be restrictive until that problem is resolved. | |
2142 | * | |
2143 | * Returns: 0 if link is OK for use by FCoE. | |
2144 | * | |
2145 | */ | |
1875f27e | 2146 | int fcoe_link_ok(struct fc_lport *lport) |
85b4aa49 | 2147 | { |
1875f27e RL |
2148 | struct fcoe_port *port = lport_priv(lport); |
2149 | struct net_device *netdev = port->fcoe->netdev; | |
85b4aa49 | 2150 | struct ethtool_cmd ecmd = { ETHTOOL_GSET }; |
85b4aa49 | 2151 | |
1875f27e RL |
2152 | if ((netdev->flags & IFF_UP) && netif_carrier_ok(netdev) && |
2153 | (!dev_ethtool_get_settings(netdev, &ecmd))) { | |
2154 | lport->link_supported_speeds &= | |
2f718d64 YZ |
2155 | ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT); |
2156 | if (ecmd.supported & (SUPPORTED_1000baseT_Half | | |
2157 | SUPPORTED_1000baseT_Full)) | |
1875f27e | 2158 | lport->link_supported_speeds |= FC_PORTSPEED_1GBIT; |
2f718d64 | 2159 | if (ecmd.supported & SUPPORTED_10000baseT_Full) |
1875f27e | 2160 | lport->link_supported_speeds |= |
2f718d64 YZ |
2161 | FC_PORTSPEED_10GBIT; |
2162 | if (ecmd.speed == SPEED_1000) | |
1875f27e | 2163 | lport->link_speed = FC_PORTSPEED_1GBIT; |
2f718d64 | 2164 | if (ecmd.speed == SPEED_10000) |
1875f27e | 2165 | lport->link_speed = FC_PORTSPEED_10GBIT; |
85b4aa49 | 2166 | |
2f718d64 YZ |
2167 | return 0; |
2168 | } | |
2169 | return -1; | |
85b4aa49 | 2170 | } |
85b4aa49 | 2171 | |
34f42a07 | 2172 | /** |
1875f27e RL |
2173 | * fcoe_percpu_clean() - Clear all pending skbs for an local port |
2174 | * @lport: The local port whose skbs are to be cleared | |
e7a51997 JE |
2175 | * |
2176 | * Must be called with fcoe_create_mutex held to single-thread completion. | |
2177 | * | |
2178 | * This flushes the pending skbs by adding a new skb to each queue and | |
2179 | * waiting until they are all freed. This assures us that not only are | |
2180 | * there no packets that will be handled by the lport, but also that any | |
2181 | * threads already handling packet have returned. | |
85b4aa49 | 2182 | */ |
1875f27e | 2183 | void fcoe_percpu_clean(struct fc_lport *lport) |
85b4aa49 | 2184 | { |
85b4aa49 RL |
2185 | struct fcoe_percpu_s *pp; |
2186 | struct fcoe_rcv_info *fr; | |
2187 | struct sk_buff_head *list; | |
2188 | struct sk_buff *skb, *next; | |
2189 | struct sk_buff *head; | |
5e5e92df | 2190 | unsigned int cpu; |
85b4aa49 | 2191 | |
5e5e92df RL |
2192 | for_each_possible_cpu(cpu) { |
2193 | pp = &per_cpu(fcoe_percpu, cpu); | |
2194 | spin_lock_bh(&pp->fcoe_rx_list.lock); | |
2195 | list = &pp->fcoe_rx_list; | |
2196 | head = list->next; | |
2197 | for (skb = head; skb != (struct sk_buff *)list; | |
2198 | skb = next) { | |
2199 | next = skb->next; | |
2200 | fr = fcoe_dev_from_skb(skb); | |
1875f27e | 2201 | if (fr->fr_dev == lport) { |
5e5e92df RL |
2202 | __skb_unlink(skb, list); |
2203 | kfree_skb(skb); | |
85b4aa49 | 2204 | } |
85b4aa49 | 2205 | } |
e7a51997 JE |
2206 | |
2207 | if (!pp->thread || !cpu_online(cpu)) { | |
2208 | spin_unlock_bh(&pp->fcoe_rx_list.lock); | |
2209 | continue; | |
2210 | } | |
2211 | ||
2212 | skb = dev_alloc_skb(0); | |
2213 | if (!skb) { | |
2214 | spin_unlock_bh(&pp->fcoe_rx_list.lock); | |
2215 | continue; | |
2216 | } | |
2217 | skb->destructor = fcoe_percpu_flush_done; | |
2218 | ||
2219 | __skb_queue_tail(&pp->fcoe_rx_list, skb); | |
2220 | if (pp->fcoe_rx_list.qlen == 1) | |
2221 | wake_up_process(pp->thread); | |
5e5e92df | 2222 | spin_unlock_bh(&pp->fcoe_rx_list.lock); |
e7a51997 JE |
2223 | |
2224 | wait_for_completion(&fcoe_flush_completion); | |
85b4aa49 RL |
2225 | } |
2226 | } | |
85b4aa49 RL |
2227 | |
2228 | /** | |
34f42a07 | 2229 | * fcoe_clean_pending_queue() - Dequeue a skb and free it |
1875f27e | 2230 | * @lport: The local port to dequeue a skb on |
34f42a07 | 2231 | */ |
1875f27e | 2232 | void fcoe_clean_pending_queue(struct fc_lport *lport) |
85b4aa49 | 2233 | { |
1875f27e | 2234 | struct fcoe_port *port = lport_priv(lport); |
85b4aa49 RL |
2235 | struct sk_buff *skb; |
2236 | ||
014f5c3f CL |
2237 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
2238 | while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) { | |
2239 | spin_unlock_bh(&port->fcoe_pending_queue.lock); | |
85b4aa49 | 2240 | kfree_skb(skb); |
014f5c3f | 2241 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
85b4aa49 | 2242 | } |
014f5c3f | 2243 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
85b4aa49 | 2244 | } |
85b4aa49 | 2245 | |
34f42a07 | 2246 | /** |
1875f27e RL |
2247 | * fcoe_reset() - Reset a local port |
2248 | * @shost: The SCSI host associated with the local port to be reset | |
85b4aa49 | 2249 | * |
1875f27e | 2250 | * Returns: Always 0 (return value required by FC transport template) |
85b4aa49 RL |
2251 | */ |
2252 | int fcoe_reset(struct Scsi_Host *shost) | |
2253 | { | |
2254 | struct fc_lport *lport = shost_priv(shost); | |
2255 | fc_lport_reset(lport); | |
2256 | return 0; | |
2257 | } | |
85b4aa49 | 2258 | |
34f42a07 | 2259 | /** |
1875f27e RL |
2260 | * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device |
2261 | * @netdev: The net device used as a key | |
85b4aa49 | 2262 | * |
1875f27e RL |
2263 | * Locking: Must be called with the RNL mutex held. |
2264 | * | |
2265 | * Returns: NULL or the FCoE interface | |
85b4aa49 | 2266 | */ |
014f5c3f | 2267 | static struct fcoe_interface * |
1875f27e | 2268 | fcoe_hostlist_lookup_port(const struct net_device *netdev) |
85b4aa49 | 2269 | { |
014f5c3f | 2270 | struct fcoe_interface *fcoe; |
85b4aa49 | 2271 | |
014f5c3f | 2272 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
1875f27e | 2273 | if (fcoe->netdev == netdev) |
014f5c3f | 2274 | return fcoe; |
85b4aa49 | 2275 | } |
85b4aa49 RL |
2276 | return NULL; |
2277 | } | |
2278 | ||
34f42a07 | 2279 | /** |
1875f27e RL |
2280 | * fcoe_hostlist_lookup() - Find the local port associated with a |
2281 | * given net device | |
2282 | * @netdev: The netdevice used as a key | |
85b4aa49 | 2283 | * |
1875f27e RL |
2284 | * Locking: Must be called with the RTNL mutex held |
2285 | * | |
2286 | * Returns: NULL or the local port | |
85b4aa49 | 2287 | */ |
090eb6c4 | 2288 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) |
85b4aa49 | 2289 | { |
014f5c3f | 2290 | struct fcoe_interface *fcoe; |
85b4aa49 | 2291 | |
014f5c3f | 2292 | fcoe = fcoe_hostlist_lookup_port(netdev); |
3fe9a0ba | 2293 | return (fcoe) ? fcoe->ctlr.lp : NULL; |
85b4aa49 | 2294 | } |
85b4aa49 | 2295 | |
34f42a07 | 2296 | /** |
1875f27e RL |
2297 | * fcoe_hostlist_add() - Add the FCoE interface identified by a local |
2298 | * port to the hostlist | |
2299 | * @lport: The local port that identifies the FCoE interface to be added | |
85b4aa49 | 2300 | * |
090eb6c4 | 2301 | * Locking: must be called with the RTNL mutex held |
1875f27e RL |
2302 | * |
2303 | * Returns: 0 for success | |
85b4aa49 | 2304 | */ |
090eb6c4 | 2305 | static int fcoe_hostlist_add(const struct fc_lport *lport) |
85b4aa49 | 2306 | { |
014f5c3f CL |
2307 | struct fcoe_interface *fcoe; |
2308 | struct fcoe_port *port; | |
2309 | ||
2310 | fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); | |
2311 | if (!fcoe) { | |
2312 | port = lport_priv(lport); | |
2313 | fcoe = port->fcoe; | |
2314 | list_add_tail(&fcoe->list, &fcoe_hostlist); | |
85b4aa49 RL |
2315 | } |
2316 | return 0; | |
2317 | } | |
85b4aa49 | 2318 | |
85b4aa49 | 2319 | /** |
1875f27e | 2320 | * fcoe_init() - Initialize fcoe.ko |
85b4aa49 | 2321 | * |
1875f27e | 2322 | * Returns: 0 on success, or a negative value on failure |
34f42a07 | 2323 | */ |
85b4aa49 RL |
2324 | static int __init fcoe_init(void) |
2325 | { | |
1875f27e | 2326 | struct fcoe_percpu_s *p; |
38eccabd | 2327 | unsigned int cpu; |
8976f424 | 2328 | int rc = 0; |
85b4aa49 | 2329 | |
dfc1d0fe CL |
2330 | mutex_lock(&fcoe_config_mutex); |
2331 | ||
38eccabd | 2332 | for_each_possible_cpu(cpu) { |
5e5e92df | 2333 | p = &per_cpu(fcoe_percpu, cpu); |
38eccabd RL |
2334 | skb_queue_head_init(&p->fcoe_rx_list); |
2335 | } | |
2336 | ||
8976f424 RL |
2337 | for_each_online_cpu(cpu) |
2338 | fcoe_percpu_thread_create(cpu); | |
85b4aa49 | 2339 | |
8976f424 RL |
2340 | /* Initialize per CPU interrupt thread */ |
2341 | rc = register_hotcpu_notifier(&fcoe_cpu_notifier); | |
2342 | if (rc) | |
2343 | goto out_free; | |
85b4aa49 | 2344 | |
8976f424 | 2345 | /* Setup link change notification */ |
85b4aa49 RL |
2346 | fcoe_dev_setup(); |
2347 | ||
5892c32f CL |
2348 | rc = fcoe_if_init(); |
2349 | if (rc) | |
2350 | goto out_free; | |
85b4aa49 | 2351 | |
dfc1d0fe | 2352 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 | 2353 | return 0; |
8976f424 RL |
2354 | |
2355 | out_free: | |
2356 | for_each_online_cpu(cpu) { | |
2357 | fcoe_percpu_thread_destroy(cpu); | |
2358 | } | |
dfc1d0fe | 2359 | mutex_unlock(&fcoe_config_mutex); |
8976f424 | 2360 | return rc; |
85b4aa49 RL |
2361 | } |
2362 | module_init(fcoe_init); | |
2363 | ||
2364 | /** | |
1875f27e | 2365 | * fcoe_exit() - Clean up fcoe.ko |
85b4aa49 | 2366 | * |
1875f27e | 2367 | * Returns: 0 on success or a negative value on failure |
34f42a07 | 2368 | */ |
85b4aa49 RL |
2369 | static void __exit fcoe_exit(void) |
2370 | { | |
014f5c3f | 2371 | struct fcoe_interface *fcoe, *tmp; |
2e70e241 | 2372 | struct fcoe_port *port; |
1875f27e | 2373 | unsigned int cpu; |
85b4aa49 | 2374 | |
dfc1d0fe CL |
2375 | mutex_lock(&fcoe_config_mutex); |
2376 | ||
85b4aa49 RL |
2377 | fcoe_dev_cleanup(); |
2378 | ||
5919a595 | 2379 | /* releases the associated fcoe hosts */ |
090eb6c4 CL |
2380 | rtnl_lock(); |
2381 | list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { | |
c863df33 | 2382 | list_del(&fcoe->list); |
2e70e241 | 2383 | port = lport_priv(fcoe->ctlr.lp); |
2e70e241 | 2384 | fcoe_interface_cleanup(fcoe); |
2e70e241 | 2385 | schedule_work(&port->destroy_work); |
c863df33 | 2386 | } |
090eb6c4 | 2387 | rtnl_unlock(); |
85b4aa49 | 2388 | |
8976f424 RL |
2389 | unregister_hotcpu_notifier(&fcoe_cpu_notifier); |
2390 | ||
014f5c3f | 2391 | for_each_online_cpu(cpu) |
8976f424 | 2392 | fcoe_percpu_thread_destroy(cpu); |
85b4aa49 | 2393 | |
dfc1d0fe | 2394 | mutex_unlock(&fcoe_config_mutex); |
2e70e241 CL |
2395 | |
2396 | /* flush any asyncronous interface destroys, | |
2397 | * this should happen after the netdev notifier is unregistered */ | |
2398 | flush_scheduled_work(); | |
9a05753b CL |
2399 | /* That will flush out all the N_Ports on the hostlist, but now we |
2400 | * may have NPIV VN_Ports scheduled for destruction */ | |
2401 | flush_scheduled_work(); | |
2e70e241 CL |
2402 | |
2403 | /* detach from scsi transport | |
2404 | * must happen after all destroys are done, therefor after the flush */ | |
2405 | fcoe_if_exit(); | |
85b4aa49 RL |
2406 | } |
2407 | module_exit(fcoe_exit); | |
11b56188 CL |
2408 | |
2409 | /** | |
2410 | * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler | |
2411 | * @seq: active sequence in the FLOGI or FDISC exchange | |
2412 | * @fp: response frame, or error encoded in a pointer (timeout) | |
2413 | * @arg: pointer the the fcoe_ctlr structure | |
2414 | * | |
2415 | * This handles MAC address managment for FCoE, then passes control on to | |
2416 | * the libfc FLOGI response handler. | |
2417 | */ | |
2418 | static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) | |
2419 | { | |
2420 | struct fcoe_ctlr *fip = arg; | |
2421 | struct fc_exch *exch = fc_seq_exch(seq); | |
2422 | struct fc_lport *lport = exch->lp; | |
2423 | u8 *mac; | |
2424 | ||
2425 | if (IS_ERR(fp)) | |
2426 | goto done; | |
2427 | ||
2428 | mac = fr_cb(fp)->granted_mac; | |
2429 | if (is_zero_ether_addr(mac)) { | |
2430 | /* pre-FIP */ | |
386309ce | 2431 | if (fcoe_ctlr_recv_flogi(fip, lport, fp)) { |
11b56188 CL |
2432 | fc_frame_free(fp); |
2433 | return; | |
2434 | } | |
11b56188 | 2435 | } |
386309ce | 2436 | fcoe_update_src_mac(lport, mac); |
11b56188 CL |
2437 | done: |
2438 | fc_lport_flogi_resp(seq, fp, lport); | |
2439 | } | |
2440 | ||
2441 | /** | |
2442 | * fcoe_logo_resp() - FCoE specific LOGO response handler | |
2443 | * @seq: active sequence in the LOGO exchange | |
2444 | * @fp: response frame, or error encoded in a pointer (timeout) | |
2445 | * @arg: pointer the the fcoe_ctlr structure | |
2446 | * | |
2447 | * This handles MAC address managment for FCoE, then passes control on to | |
2448 | * the libfc LOGO response handler. | |
2449 | */ | |
2450 | static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) | |
2451 | { | |
386309ce | 2452 | struct fc_lport *lport = arg; |
11b56188 CL |
2453 | static u8 zero_mac[ETH_ALEN] = { 0 }; |
2454 | ||
2455 | if (!IS_ERR(fp)) | |
386309ce | 2456 | fcoe_update_src_mac(lport, zero_mac); |
11b56188 CL |
2457 | fc_lport_logo_resp(seq, fp, lport); |
2458 | } | |
2459 | ||
2460 | /** | |
2461 | * fcoe_elsct_send - FCoE specific ELS handler | |
2462 | * | |
2463 | * This does special case handling of FIP encapsualted ELS exchanges for FCoE, | |
2464 | * using FCoE specific response handlers and passing the FIP controller as | |
2465 | * the argument (the lport is still available from the exchange). | |
2466 | * | |
2467 | * Most of the work here is just handed off to the libfc routine. | |
2468 | */ | |
1875f27e RL |
2469 | static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, |
2470 | struct fc_frame *fp, unsigned int op, | |
2471 | void (*resp)(struct fc_seq *, | |
2472 | struct fc_frame *, | |
2473 | void *), | |
2474 | void *arg, u32 timeout) | |
11b56188 CL |
2475 | { |
2476 | struct fcoe_port *port = lport_priv(lport); | |
2477 | struct fcoe_interface *fcoe = port->fcoe; | |
2478 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
2479 | struct fc_frame_header *fh = fc_frame_header_get(fp); | |
2480 | ||
2481 | switch (op) { | |
2482 | case ELS_FLOGI: | |
2483 | case ELS_FDISC: | |
2484 | return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, | |
2485 | fip, timeout); | |
2486 | case ELS_LOGO: | |
2487 | /* only hook onto fabric logouts, not port logouts */ | |
2488 | if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) | |
2489 | break; | |
2490 | return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, | |
386309ce | 2491 | lport, timeout); |
11b56188 CL |
2492 | } |
2493 | return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); | |
2494 | } | |
2495 | ||
9a05753b CL |
2496 | /** |
2497 | * fcoe_vport_create() - create an fc_host/scsi_host for a vport | |
2498 | * @vport: fc_vport object to create a new fc_host for | |
2499 | * @disabled: start the new fc_host in a disabled state by default? | |
2500 | * | |
2501 | * Returns: 0 for success | |
2502 | */ | |
2503 | static int fcoe_vport_create(struct fc_vport *vport, bool disabled) | |
2504 | { | |
2505 | struct Scsi_Host *shost = vport_to_shost(vport); | |
2506 | struct fc_lport *n_port = shost_priv(shost); | |
2507 | struct fcoe_port *port = lport_priv(n_port); | |
2508 | struct fcoe_interface *fcoe = port->fcoe; | |
2509 | struct net_device *netdev = fcoe->netdev; | |
2510 | struct fc_lport *vn_port; | |
2511 | ||
2512 | mutex_lock(&fcoe_config_mutex); | |
2513 | vn_port = fcoe_if_create(fcoe, &vport->dev, 1); | |
2514 | mutex_unlock(&fcoe_config_mutex); | |
2515 | ||
2516 | if (IS_ERR(vn_port)) { | |
2517 | printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", | |
2518 | netdev->name); | |
2519 | return -EIO; | |
2520 | } | |
2521 | ||
2522 | if (disabled) { | |
2523 | fc_vport_set_state(vport, FC_VPORT_DISABLED); | |
2524 | } else { | |
2525 | vn_port->boot_time = jiffies; | |
2526 | fc_fabric_login(vn_port); | |
2527 | fc_vport_setlink(vn_port); | |
2528 | } | |
2529 | return 0; | |
2530 | } | |
2531 | ||
2532 | /** | |
2533 | * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport | |
2534 | * @vport: fc_vport object that is being destroyed | |
2535 | * | |
2536 | * Returns: 0 for success | |
2537 | */ | |
2538 | static int fcoe_vport_destroy(struct fc_vport *vport) | |
2539 | { | |
2540 | struct Scsi_Host *shost = vport_to_shost(vport); | |
2541 | struct fc_lport *n_port = shost_priv(shost); | |
2542 | struct fc_lport *vn_port = vport->dd_data; | |
2543 | struct fcoe_port *port = lport_priv(vn_port); | |
2544 | ||
2545 | mutex_lock(&n_port->lp_mutex); | |
2546 | list_del(&vn_port->list); | |
2547 | mutex_unlock(&n_port->lp_mutex); | |
2548 | schedule_work(&port->destroy_work); | |
2549 | return 0; | |
2550 | } | |
2551 | ||
2552 | /** | |
2553 | * fcoe_vport_disable() - change vport state | |
2554 | * @vport: vport to bring online/offline | |
2555 | * @disable: should the vport be disabled? | |
2556 | */ | |
2557 | static int fcoe_vport_disable(struct fc_vport *vport, bool disable) | |
2558 | { | |
2559 | struct fc_lport *lport = vport->dd_data; | |
2560 | ||
2561 | if (disable) { | |
2562 | fc_vport_set_state(vport, FC_VPORT_DISABLED); | |
2563 | fc_fabric_logoff(lport); | |
2564 | } else { | |
2565 | lport->boot_time = jiffies; | |
2566 | fc_fabric_login(lport); | |
2567 | fc_vport_setlink(lport); | |
2568 | } | |
2569 | ||
2570 | return 0; | |
2571 | } | |
2572 | ||
dc8596d3 CL |
2573 | /** |
2574 | * fcoe_vport_set_symbolic_name() - append vport string to symbolic name | |
2575 | * @vport: fc_vport with a new symbolic name string | |
2576 | * | |
2577 | * After generating a new symbolic name string, a new RSPN_ID request is | |
2578 | * sent to the name server. There is no response handler, so if it fails | |
2579 | * for some reason it will not be retried. | |
2580 | */ | |
2581 | static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) | |
2582 | { | |
2583 | struct fc_lport *lport = vport->dd_data; | |
2584 | struct fc_frame *fp; | |
2585 | size_t len; | |
2586 | ||
2587 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, | |
2588 | "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, | |
2589 | fcoe_netdev(lport)->name, vport->symbolic_name); | |
2590 | ||
2591 | if (lport->state != LPORT_ST_READY) | |
2592 | return; | |
2593 | ||
2594 | len = strnlen(fc_host_symbolic_name(lport->host), 255); | |
2595 | fp = fc_frame_alloc(lport, | |
2596 | sizeof(struct fc_ct_hdr) + | |
2597 | sizeof(struct fc_ns_rspn) + len); | |
2598 | if (!fp) | |
2599 | return; | |
2600 | lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, | |
b94f8951 | 2601 | NULL, NULL, 3 * lport->r_a_tov); |
dc8596d3 | 2602 | } |
b84056bf YZ |
2603 | |
2604 | /** | |
2605 | * fcoe_get_lesb() - Fill the FCoE Link Error Status Block | |
2606 | * @lport: the local port | |
2607 | * @fc_lesb: the link error status block | |
2608 | */ | |
2609 | static void fcoe_get_lesb(struct fc_lport *lport, | |
2610 | struct fc_els_lesb *fc_lesb) | |
2611 | { | |
2612 | unsigned int cpu; | |
2613 | u32 lfc, vlfc, mdac; | |
2614 | struct fcoe_dev_stats *devst; | |
2615 | struct fcoe_fc_els_lesb *lesb; | |
2616 | struct net_device *netdev = fcoe_netdev(lport); | |
2617 | ||
2618 | lfc = 0; | |
2619 | vlfc = 0; | |
2620 | mdac = 0; | |
2621 | lesb = (struct fcoe_fc_els_lesb *)fc_lesb; | |
2622 | memset(lesb, 0, sizeof(*lesb)); | |
2623 | for_each_possible_cpu(cpu) { | |
2624 | devst = per_cpu_ptr(lport->dev_stats, cpu); | |
2625 | lfc += devst->LinkFailureCount; | |
2626 | vlfc += devst->VLinkFailureCount; | |
2627 | mdac += devst->MissDiscAdvCount; | |
2628 | } | |
2629 | lesb->lesb_link_fail = htonl(lfc); | |
2630 | lesb->lesb_vlink_fail = htonl(vlfc); | |
2631 | lesb->lesb_miss_fka = htonl(mdac); | |
2632 | lesb->lesb_fcs_error = htonl(dev_get_stats(netdev)->rx_crc_errors); | |
2633 | } |