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85b4aa49 | 1 | /* |
af7f85d9 | 2 | * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved. |
85b4aa49 RL |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | * | |
17 | * Maintained at www.Open-FCoE.org | |
18 | */ | |
19 | ||
20 | #include <linux/module.h> | |
21 | #include <linux/version.h> | |
85b4aa49 | 22 | #include <linux/spinlock.h> |
85b4aa49 RL |
23 | #include <linux/netdevice.h> |
24 | #include <linux/etherdevice.h> | |
25 | #include <linux/ethtool.h> | |
26 | #include <linux/if_ether.h> | |
27 | #include <linux/if_vlan.h> | |
85b4aa49 | 28 | #include <linux/crc32.h> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
85b4aa49 RL |
30 | #include <linux/cpu.h> |
31 | #include <linux/fs.h> | |
32 | #include <linux/sysfs.h> | |
33 | #include <linux/ctype.h> | |
34 | #include <scsi/scsi_tcq.h> | |
35 | #include <scsi/scsicam.h> | |
36 | #include <scsi/scsi_transport.h> | |
37 | #include <scsi/scsi_transport_fc.h> | |
38 | #include <net/rtnetlink.h> | |
39 | ||
40 | #include <scsi/fc/fc_encaps.h> | |
97c8389d | 41 | #include <scsi/fc/fc_fip.h> |
85b4aa49 RL |
42 | |
43 | #include <scsi/libfc.h> | |
44 | #include <scsi/fc_frame.h> | |
45 | #include <scsi/libfcoe.h> | |
85b4aa49 | 46 | |
fdd78027 | 47 | #include "fcoe.h" |
7f349142 | 48 | |
85b4aa49 RL |
49 | MODULE_AUTHOR("Open-FCoE.org"); |
50 | MODULE_DESCRIPTION("FCoE"); | |
9b34ecff | 51 | MODULE_LICENSE("GPL v2"); |
85b4aa49 | 52 | |
05cc7390 YZ |
53 | /* Performance tuning parameters for fcoe */ |
54 | static unsigned int fcoe_ddp_min; | |
55 | module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR); | |
56 | MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \ | |
57 | "Direct Data Placement (DDP)."); | |
58 | ||
dfc1d0fe CL |
59 | DEFINE_MUTEX(fcoe_config_mutex); |
60 | ||
e7a51997 JE |
61 | /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */ |
62 | static DECLARE_COMPLETION(fcoe_flush_completion); | |
63 | ||
85b4aa49 | 64 | /* fcoe host list */ |
090eb6c4 | 65 | /* must only by accessed under the RTNL mutex */ |
85b4aa49 | 66 | LIST_HEAD(fcoe_hostlist); |
5e5e92df | 67 | DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu); |
85b4aa49 | 68 | |
dd3fd72e | 69 | /* Function Prototypes */ |
1875f27e | 70 | static int fcoe_reset(struct Scsi_Host *); |
fdd78027 VD |
71 | static int fcoe_xmit(struct fc_lport *, struct fc_frame *); |
72 | static int fcoe_rcv(struct sk_buff *, struct net_device *, | |
73 | struct packet_type *, struct net_device *); | |
1875f27e RL |
74 | static int fcoe_percpu_receive_thread(void *); |
75 | static void fcoe_clean_pending_queue(struct fc_lport *); | |
76 | static void fcoe_percpu_clean(struct fc_lport *); | |
5e4f8fe7 | 77 | static int fcoe_link_speed_update(struct fc_lport *); |
1875f27e | 78 | static int fcoe_link_ok(struct fc_lport *); |
fdd78027 VD |
79 | |
80 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); | |
81 | static int fcoe_hostlist_add(const struct fc_lport *); | |
fdd78027 | 82 | |
4bb6b515 | 83 | static void fcoe_check_wait_queue(struct fc_lport *, struct sk_buff *); |
85b4aa49 RL |
84 | static int fcoe_device_notification(struct notifier_block *, ulong, void *); |
85 | static void fcoe_dev_setup(void); | |
86 | static void fcoe_dev_cleanup(void); | |
1875f27e RL |
87 | static struct fcoe_interface |
88 | *fcoe_hostlist_lookup_port(const struct net_device *); | |
89 | ||
90 | static int fcoe_fip_recv(struct sk_buff *, struct net_device *, | |
91 | struct packet_type *, struct net_device *); | |
92 | ||
93 | static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *); | |
94 | static void fcoe_update_src_mac(struct fc_lport *, u8 *); | |
95 | static u8 *fcoe_get_src_mac(struct fc_lport *); | |
96 | static void fcoe_destroy_work(struct work_struct *); | |
97 | ||
98 | static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *, | |
99 | unsigned int); | |
100 | static int fcoe_ddp_done(struct fc_lport *, u16); | |
101 | ||
102 | static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *); | |
103 | ||
104 | static int fcoe_create(const char *, struct kernel_param *); | |
105 | static int fcoe_destroy(const char *, struct kernel_param *); | |
55a66d3c VD |
106 | static int fcoe_enable(const char *, struct kernel_param *); |
107 | static int fcoe_disable(const char *, struct kernel_param *); | |
1875f27e | 108 | |
1875f27e RL |
109 | static struct fc_seq *fcoe_elsct_send(struct fc_lport *, |
110 | u32 did, struct fc_frame *, | |
111 | unsigned int op, | |
112 | void (*resp)(struct fc_seq *, | |
113 | struct fc_frame *, | |
114 | void *), | |
115 | void *, u32 timeout); | |
859b7b64 | 116 | static void fcoe_recv_frame(struct sk_buff *skb); |
1875f27e | 117 | |
b84056bf YZ |
118 | static void fcoe_get_lesb(struct fc_lport *, struct fc_els_lesb *); |
119 | ||
1875f27e RL |
120 | module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR); |
121 | __MODULE_PARM_TYPE(create, "string"); | |
55a66d3c | 122 | MODULE_PARM_DESC(create, " Creates fcoe instance on a ethernet interface"); |
1875f27e RL |
123 | module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR); |
124 | __MODULE_PARM_TYPE(destroy, "string"); | |
55a66d3c VD |
125 | MODULE_PARM_DESC(destroy, " Destroys fcoe instance on a ethernet interface"); |
126 | module_param_call(enable, fcoe_enable, NULL, NULL, S_IWUSR); | |
127 | __MODULE_PARM_TYPE(enable, "string"); | |
128 | MODULE_PARM_DESC(enable, " Enables fcoe on a ethernet interface."); | |
129 | module_param_call(disable, fcoe_disable, NULL, NULL, S_IWUSR); | |
130 | __MODULE_PARM_TYPE(disable, "string"); | |
131 | MODULE_PARM_DESC(disable, " Disables fcoe on a ethernet interface."); | |
1875f27e RL |
132 | |
133 | /* notification function for packets from net device */ | |
85b4aa49 RL |
134 | static struct notifier_block fcoe_notifier = { |
135 | .notifier_call = fcoe_device_notification, | |
136 | }; | |
137 | ||
1875f27e RL |
138 | /* notification function for CPU hotplug events */ |
139 | static struct notifier_block fcoe_cpu_notifier = { | |
140 | .notifier_call = fcoe_cpu_callback, | |
141 | }; | |
142 | ||
e9084bb8 CL |
143 | static struct scsi_transport_template *fcoe_transport_template; |
144 | static struct scsi_transport_template *fcoe_vport_transport_template; | |
7f349142 | 145 | |
1875f27e RL |
146 | static int fcoe_vport_destroy(struct fc_vport *); |
147 | static int fcoe_vport_create(struct fc_vport *, bool disabled); | |
148 | static int fcoe_vport_disable(struct fc_vport *, bool disable); | |
149 | static void fcoe_set_vport_symbolic_name(struct fc_vport *); | |
7d65b0df | 150 | static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *); |
1875f27e RL |
151 | |
152 | static struct libfc_function_template fcoe_libfc_fcn_templ = { | |
153 | .frame_send = fcoe_xmit, | |
154 | .ddp_setup = fcoe_ddp_setup, | |
155 | .ddp_done = fcoe_ddp_done, | |
156 | .elsct_send = fcoe_elsct_send, | |
b84056bf | 157 | .get_lesb = fcoe_get_lesb, |
7d65b0df | 158 | .lport_set_port_id = fcoe_set_port_id, |
1875f27e | 159 | }; |
9a05753b | 160 | |
7f349142 VD |
161 | struct fc_function_template fcoe_transport_function = { |
162 | .show_host_node_name = 1, | |
163 | .show_host_port_name = 1, | |
164 | .show_host_supported_classes = 1, | |
165 | .show_host_supported_fc4s = 1, | |
166 | .show_host_active_fc4s = 1, | |
167 | .show_host_maxframe_size = 1, | |
168 | ||
169 | .show_host_port_id = 1, | |
170 | .show_host_supported_speeds = 1, | |
171 | .get_host_speed = fc_get_host_speed, | |
172 | .show_host_speed = 1, | |
173 | .show_host_port_type = 1, | |
174 | .get_host_port_state = fc_get_host_port_state, | |
175 | .show_host_port_state = 1, | |
176 | .show_host_symbolic_name = 1, | |
177 | ||
178 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
179 | .show_rport_maxframe_size = 1, | |
180 | .show_rport_supported_classes = 1, | |
181 | ||
182 | .show_host_fabric_name = 1, | |
183 | .show_starget_node_name = 1, | |
184 | .show_starget_port_name = 1, | |
185 | .show_starget_port_id = 1, | |
186 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
187 | .show_rport_dev_loss_tmo = 1, | |
188 | .get_fc_host_stats = fc_get_host_stats, | |
189 | .issue_fc_host_lip = fcoe_reset, | |
190 | ||
191 | .terminate_rport_io = fc_rport_terminate_io, | |
9a05753b CL |
192 | |
193 | .vport_create = fcoe_vport_create, | |
194 | .vport_delete = fcoe_vport_destroy, | |
195 | .vport_disable = fcoe_vport_disable, | |
dc8596d3 | 196 | .set_vport_symbolic_name = fcoe_set_vport_symbolic_name, |
a51ab396 SM |
197 | |
198 | .bsg_request = fc_lport_bsg_request, | |
7f349142 VD |
199 | }; |
200 | ||
e9084bb8 CL |
201 | struct fc_function_template fcoe_vport_transport_function = { |
202 | .show_host_node_name = 1, | |
203 | .show_host_port_name = 1, | |
204 | .show_host_supported_classes = 1, | |
205 | .show_host_supported_fc4s = 1, | |
206 | .show_host_active_fc4s = 1, | |
207 | .show_host_maxframe_size = 1, | |
208 | ||
209 | .show_host_port_id = 1, | |
210 | .show_host_supported_speeds = 1, | |
211 | .get_host_speed = fc_get_host_speed, | |
212 | .show_host_speed = 1, | |
213 | .show_host_port_type = 1, | |
214 | .get_host_port_state = fc_get_host_port_state, | |
215 | .show_host_port_state = 1, | |
216 | .show_host_symbolic_name = 1, | |
217 | ||
218 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
219 | .show_rport_maxframe_size = 1, | |
220 | .show_rport_supported_classes = 1, | |
221 | ||
222 | .show_host_fabric_name = 1, | |
223 | .show_starget_node_name = 1, | |
224 | .show_starget_port_name = 1, | |
225 | .show_starget_port_id = 1, | |
226 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
227 | .show_rport_dev_loss_tmo = 1, | |
228 | .get_fc_host_stats = fc_get_host_stats, | |
229 | .issue_fc_host_lip = fcoe_reset, | |
230 | ||
231 | .terminate_rport_io = fc_rport_terminate_io, | |
a51ab396 SM |
232 | |
233 | .bsg_request = fc_lport_bsg_request, | |
e9084bb8 CL |
234 | }; |
235 | ||
7f349142 VD |
236 | static struct scsi_host_template fcoe_shost_template = { |
237 | .module = THIS_MODULE, | |
238 | .name = "FCoE Driver", | |
239 | .proc_name = FCOE_NAME, | |
240 | .queuecommand = fc_queuecommand, | |
241 | .eh_abort_handler = fc_eh_abort, | |
242 | .eh_device_reset_handler = fc_eh_device_reset, | |
243 | .eh_host_reset_handler = fc_eh_host_reset, | |
244 | .slave_alloc = fc_slave_alloc, | |
245 | .change_queue_depth = fc_change_queue_depth, | |
246 | .change_queue_type = fc_change_queue_type, | |
247 | .this_id = -1, | |
14caf44c | 248 | .cmd_per_lun = 3, |
7f349142 VD |
249 | .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, |
250 | .use_clustering = ENABLE_CLUSTERING, | |
251 | .sg_tablesize = SG_ALL, | |
252 | .max_sectors = 0xffff, | |
253 | }; | |
254 | ||
54b649f8 | 255 | /** |
1875f27e RL |
256 | * fcoe_interface_setup() - Setup a FCoE interface |
257 | * @fcoe: The new FCoE interface | |
258 | * @netdev: The net device that the fcoe interface is on | |
54b649f8 CL |
259 | * |
260 | * Returns : 0 for success | |
2e70e241 | 261 | * Locking: must be called with the RTNL mutex held |
54b649f8 CL |
262 | */ |
263 | static int fcoe_interface_setup(struct fcoe_interface *fcoe, | |
264 | struct net_device *netdev) | |
265 | { | |
266 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
267 | struct netdev_hw_addr *ha; | |
5bab87e6 | 268 | struct net_device *real_dev; |
54b649f8 | 269 | u8 flogi_maddr[ETH_ALEN]; |
b7a727f1 | 270 | const struct net_device_ops *ops; |
54b649f8 CL |
271 | |
272 | fcoe->netdev = netdev; | |
273 | ||
b7a727f1 YZ |
274 | /* Let LLD initialize for FCoE */ |
275 | ops = netdev->netdev_ops; | |
276 | if (ops->ndo_fcoe_enable) { | |
277 | if (ops->ndo_fcoe_enable(netdev)) | |
278 | FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE" | |
279 | " specific feature for LLD.\n"); | |
280 | } | |
281 | ||
54b649f8 CL |
282 | /* Do not support for bonding device */ |
283 | if ((netdev->priv_flags & IFF_MASTER_ALB) || | |
284 | (netdev->priv_flags & IFF_SLAVE_INACTIVE) || | |
285 | (netdev->priv_flags & IFF_MASTER_8023AD)) { | |
59d92516 | 286 | FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n"); |
54b649f8 CL |
287 | return -EOPNOTSUPP; |
288 | } | |
289 | ||
290 | /* look for SAN MAC address, if multiple SAN MACs exist, only | |
291 | * use the first one for SPMA */ | |
5bab87e6 YZ |
292 | real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ? |
293 | vlan_dev_real_dev(netdev) : netdev; | |
54b649f8 | 294 | rcu_read_lock(); |
5bab87e6 | 295 | for_each_dev_addr(real_dev, ha) { |
54b649f8 | 296 | if ((ha->type == NETDEV_HW_ADDR_T_SAN) && |
bf361707 | 297 | (is_valid_ether_addr(ha->addr))) { |
54b649f8 CL |
298 | memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); |
299 | fip->spma = 1; | |
300 | break; | |
301 | } | |
302 | } | |
303 | rcu_read_unlock(); | |
304 | ||
305 | /* setup Source Mac Address */ | |
306 | if (!fip->spma) | |
307 | memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); | |
308 | ||
309 | /* | |
310 | * Add FCoE MAC address as second unicast MAC address | |
311 | * or enter promiscuous mode if not capable of listening | |
312 | * for multiple unicast MACs. | |
313 | */ | |
54b649f8 | 314 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
a748ee24 | 315 | dev_uc_add(netdev, flogi_maddr); |
54b649f8 | 316 | if (fip->spma) |
a748ee24 | 317 | dev_uc_add(netdev, fip->ctl_src_addr); |
e10f8c66 JE |
318 | if (fip->mode == FIP_MODE_VN2VN) { |
319 | dev_mc_add(netdev, FIP_ALL_VN2VN_MACS); | |
320 | dev_mc_add(netdev, FIP_ALL_P2P_MACS); | |
321 | } else | |
322 | dev_mc_add(netdev, FIP_ALL_ENODE_MACS); | |
54b649f8 CL |
323 | |
324 | /* | |
325 | * setup the receive function from ethernet driver | |
326 | * on the ethertype for the given device | |
327 | */ | |
328 | fcoe->fcoe_packet_type.func = fcoe_rcv; | |
329 | fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE); | |
330 | fcoe->fcoe_packet_type.dev = netdev; | |
331 | dev_add_pack(&fcoe->fcoe_packet_type); | |
332 | ||
333 | fcoe->fip_packet_type.func = fcoe_fip_recv; | |
334 | fcoe->fip_packet_type.type = htons(ETH_P_FIP); | |
335 | fcoe->fip_packet_type.dev = netdev; | |
336 | dev_add_pack(&fcoe->fip_packet_type); | |
337 | ||
338 | return 0; | |
339 | } | |
340 | ||
030f4e00 | 341 | /** |
1875f27e RL |
342 | * fcoe_interface_create() - Create a FCoE interface on a net device |
343 | * @netdev: The net device to create the FCoE interface on | |
030f4e00 CL |
344 | * |
345 | * Returns: pointer to a struct fcoe_interface or NULL on error | |
346 | */ | |
347 | static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev) | |
348 | { | |
349 | struct fcoe_interface *fcoe; | |
59d92516 | 350 | int err; |
030f4e00 CL |
351 | |
352 | fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL); | |
353 | if (!fcoe) { | |
354 | FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n"); | |
355 | return NULL; | |
356 | } | |
357 | ||
2e70e241 | 358 | dev_hold(netdev); |
030f4e00 | 359 | kref_init(&fcoe->kref); |
54b649f8 CL |
360 | |
361 | /* | |
362 | * Initialize FIP. | |
363 | */ | |
3d902ac0 | 364 | fcoe_ctlr_init(&fcoe->ctlr, FIP_MODE_AUTO); |
54b649f8 CL |
365 | fcoe->ctlr.send = fcoe_fip_send; |
366 | fcoe->ctlr.update_mac = fcoe_update_src_mac; | |
11b56188 | 367 | fcoe->ctlr.get_src_addr = fcoe_get_src_mac; |
54b649f8 | 368 | |
59d92516 | 369 | err = fcoe_interface_setup(fcoe, netdev); |
370 | if (err) { | |
371 | fcoe_ctlr_destroy(&fcoe->ctlr); | |
372 | kfree(fcoe); | |
373 | dev_put(netdev); | |
374 | return NULL; | |
375 | } | |
030f4e00 CL |
376 | |
377 | return fcoe; | |
378 | } | |
379 | ||
54b649f8 | 380 | /** |
1875f27e RL |
381 | * fcoe_interface_cleanup() - Clean up a FCoE interface |
382 | * @fcoe: The FCoE interface to be cleaned up | |
2e70e241 CL |
383 | * |
384 | * Caller must be holding the RTNL mutex | |
54b649f8 CL |
385 | */ |
386 | void fcoe_interface_cleanup(struct fcoe_interface *fcoe) | |
387 | { | |
388 | struct net_device *netdev = fcoe->netdev; | |
389 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
390 | u8 flogi_maddr[ETH_ALEN]; | |
b7a727f1 | 391 | const struct net_device_ops *ops; |
54b649f8 CL |
392 | |
393 | /* | |
394 | * Don't listen for Ethernet packets anymore. | |
395 | * synchronize_net() ensures that the packet handlers are not running | |
396 | * on another CPU. dev_remove_pack() would do that, this calls the | |
397 | * unsyncronized version __dev_remove_pack() to avoid multiple delays. | |
398 | */ | |
399 | __dev_remove_pack(&fcoe->fcoe_packet_type); | |
400 | __dev_remove_pack(&fcoe->fip_packet_type); | |
401 | synchronize_net(); | |
402 | ||
54b649f8 | 403 | /* Delete secondary MAC addresses */ |
54b649f8 | 404 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
a748ee24 | 405 | dev_uc_del(netdev, flogi_maddr); |
54b649f8 | 406 | if (fip->spma) |
a748ee24 | 407 | dev_uc_del(netdev, fip->ctl_src_addr); |
e10f8c66 JE |
408 | if (fip->mode == FIP_MODE_VN2VN) { |
409 | dev_mc_del(netdev, FIP_ALL_VN2VN_MACS); | |
410 | dev_mc_del(netdev, FIP_ALL_P2P_MACS); | |
411 | } else | |
412 | dev_mc_del(netdev, FIP_ALL_ENODE_MACS); | |
b7a727f1 YZ |
413 | |
414 | /* Tell the LLD we are done w/ FCoE */ | |
415 | ops = netdev->netdev_ops; | |
416 | if (ops->ndo_fcoe_disable) { | |
417 | if (ops->ndo_fcoe_disable(netdev)) | |
418 | FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" | |
419 | " specific feature for LLD.\n"); | |
420 | } | |
54b649f8 CL |
421 | } |
422 | ||
030f4e00 CL |
423 | /** |
424 | * fcoe_interface_release() - fcoe_port kref release function | |
1875f27e | 425 | * @kref: Embedded reference count in an fcoe_interface struct |
030f4e00 CL |
426 | */ |
427 | static void fcoe_interface_release(struct kref *kref) | |
428 | { | |
429 | struct fcoe_interface *fcoe; | |
2e70e241 | 430 | struct net_device *netdev; |
030f4e00 CL |
431 | |
432 | fcoe = container_of(kref, struct fcoe_interface, kref); | |
2e70e241 CL |
433 | netdev = fcoe->netdev; |
434 | /* tear-down the FCoE controller */ | |
435 | fcoe_ctlr_destroy(&fcoe->ctlr); | |
030f4e00 | 436 | kfree(fcoe); |
2e70e241 | 437 | dev_put(netdev); |
030f4e00 CL |
438 | } |
439 | ||
440 | /** | |
1875f27e RL |
441 | * fcoe_interface_get() - Get a reference to a FCoE interface |
442 | * @fcoe: The FCoE interface to be held | |
030f4e00 CL |
443 | */ |
444 | static inline void fcoe_interface_get(struct fcoe_interface *fcoe) | |
445 | { | |
446 | kref_get(&fcoe->kref); | |
447 | } | |
448 | ||
449 | /** | |
1875f27e RL |
450 | * fcoe_interface_put() - Put a reference to a FCoE interface |
451 | * @fcoe: The FCoE interface to be released | |
030f4e00 CL |
452 | */ |
453 | static inline void fcoe_interface_put(struct fcoe_interface *fcoe) | |
454 | { | |
455 | kref_put(&fcoe->kref, fcoe_interface_release); | |
456 | } | |
457 | ||
ab6b85c1 | 458 | /** |
1875f27e RL |
459 | * fcoe_fip_recv() - Handler for received FIP frames |
460 | * @skb: The receive skb | |
461 | * @netdev: The associated net device | |
462 | * @ptype: The packet_type structure which was used to register this handler | |
463 | * @orig_dev: The original net_device the the skb was received on. | |
464 | * (in case dev is a bond) | |
ab6b85c1 VD |
465 | * |
466 | * Returns: 0 for success | |
467 | */ | |
1875f27e | 468 | static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, |
ab6b85c1 VD |
469 | struct packet_type *ptype, |
470 | struct net_device *orig_dev) | |
471 | { | |
259ad85d | 472 | struct fcoe_interface *fcoe; |
ab6b85c1 | 473 | |
259ad85d | 474 | fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); |
3fe9a0ba | 475 | fcoe_ctlr_recv(&fcoe->ctlr, skb); |
ab6b85c1 VD |
476 | return 0; |
477 | } | |
478 | ||
479 | /** | |
1875f27e RL |
480 | * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame |
481 | * @fip: The FCoE controller | |
482 | * @skb: The FIP packet to be sent | |
ab6b85c1 VD |
483 | */ |
484 | static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
485 | { | |
3fe9a0ba | 486 | skb->dev = fcoe_from_ctlr(fip)->netdev; |
ab6b85c1 VD |
487 | dev_queue_xmit(skb); |
488 | } | |
489 | ||
490 | /** | |
1875f27e RL |
491 | * fcoe_update_src_mac() - Update the Ethernet MAC filters |
492 | * @lport: The local port to update the source MAC on | |
493 | * @addr: Unicast MAC address to add | |
ab6b85c1 VD |
494 | * |
495 | * Remove any previously-set unicast MAC filter. | |
496 | * Add secondary FCoE MAC address filter for our OUI. | |
497 | */ | |
11b56188 | 498 | static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) |
ab6b85c1 | 499 | { |
11b56188 CL |
500 | struct fcoe_port *port = lport_priv(lport); |
501 | struct fcoe_interface *fcoe = port->fcoe; | |
25024989 | 502 | |
ab6b85c1 | 503 | rtnl_lock(); |
11b56188 | 504 | if (!is_zero_ether_addr(port->data_src_addr)) |
a748ee24 | 505 | dev_uc_del(fcoe->netdev, port->data_src_addr); |
11b56188 | 506 | if (!is_zero_ether_addr(addr)) |
a748ee24 | 507 | dev_uc_add(fcoe->netdev, addr); |
11b56188 | 508 | memcpy(port->data_src_addr, addr, ETH_ALEN); |
ab6b85c1 VD |
509 | rtnl_unlock(); |
510 | } | |
511 | ||
11b56188 CL |
512 | /** |
513 | * fcoe_get_src_mac() - return the Ethernet source address for an lport | |
514 | * @lport: libfc lport | |
515 | */ | |
516 | static u8 *fcoe_get_src_mac(struct fc_lport *lport) | |
517 | { | |
518 | struct fcoe_port *port = lport_priv(lport); | |
519 | ||
520 | return port->data_src_addr; | |
521 | } | |
522 | ||
7f349142 | 523 | /** |
1875f27e RL |
524 | * fcoe_lport_config() - Set up a local port |
525 | * @lport: The local port to be setup | |
7f349142 VD |
526 | * |
527 | * Returns: 0 for success | |
528 | */ | |
1875f27e | 529 | static int fcoe_lport_config(struct fc_lport *lport) |
7f349142 | 530 | { |
1875f27e RL |
531 | lport->link_up = 0; |
532 | lport->qfull = 0; | |
533 | lport->max_retry_count = 3; | |
534 | lport->max_rport_retry_count = 3; | |
535 | lport->e_d_tov = 2 * 1000; /* FC-FS default */ | |
536 | lport->r_a_tov = 2 * 2 * 1000; | |
537 | lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | | |
538 | FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); | |
539 | lport->does_npiv = 1; | |
540 | ||
541 | fc_lport_init_stats(lport); | |
7f349142 VD |
542 | |
543 | /* lport fc_lport related configuration */ | |
1875f27e | 544 | fc_lport_config(lport); |
7f349142 VD |
545 | |
546 | /* offload related configuration */ | |
1875f27e RL |
547 | lport->crc_offload = 0; |
548 | lport->seq_offload = 0; | |
549 | lport->lro_enabled = 0; | |
550 | lport->lro_xid = 0; | |
551 | lport->lso_max = 0; | |
7f349142 VD |
552 | |
553 | return 0; | |
554 | } | |
555 | ||
1047f221 | 556 | /** |
1875f27e RL |
557 | * fcoe_queue_timer() - The fcoe queue timer |
558 | * @lport: The local port | |
1047f221 VD |
559 | * |
560 | * Calls fcoe_check_wait_queue on timeout | |
1047f221 | 561 | */ |
1875f27e | 562 | static void fcoe_queue_timer(ulong lport) |
1047f221 | 563 | { |
1875f27e | 564 | fcoe_check_wait_queue((struct fc_lport *)lport, NULL); |
1047f221 VD |
565 | } |
566 | ||
dcece412 YZ |
567 | /** |
568 | * fcoe_get_wwn() - Get the world wide name from LLD if it supports it | |
569 | * @netdev: the associated net device | |
570 | * @wwn: the output WWN | |
571 | * @type: the type of WWN (WWPN or WWNN) | |
572 | * | |
573 | * Returns: 0 for success | |
574 | */ | |
575 | static int fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type) | |
576 | { | |
577 | const struct net_device_ops *ops = netdev->netdev_ops; | |
578 | ||
579 | if (ops->ndo_fcoe_get_wwn) | |
580 | return ops->ndo_fcoe_get_wwn(netdev, wwn, type); | |
581 | return -EINVAL; | |
582 | } | |
583 | ||
7f349142 | 584 | /** |
1875f27e RL |
585 | * fcoe_netdev_config() - Set up net devive for SW FCoE |
586 | * @lport: The local port that is associated with the net device | |
587 | * @netdev: The associated net device | |
7f349142 | 588 | * |
1875f27e | 589 | * Must be called after fcoe_lport_config() as it will use local port mutex |
7f349142 | 590 | * |
1875f27e | 591 | * Returns: 0 for success |
7f349142 | 592 | */ |
1875f27e | 593 | static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) |
7f349142 VD |
594 | { |
595 | u32 mfs; | |
596 | u64 wwnn, wwpn; | |
25024989 | 597 | struct fcoe_interface *fcoe; |
014f5c3f | 598 | struct fcoe_port *port; |
cc0136c2 | 599 | int vid = 0; |
7f349142 VD |
600 | |
601 | /* Setup lport private data to point to fcoe softc */ | |
1875f27e | 602 | port = lport_priv(lport); |
25024989 | 603 | fcoe = port->fcoe; |
7f349142 VD |
604 | |
605 | /* | |
606 | * Determine max frame size based on underlying device and optional | |
607 | * user-configured limit. If the MFS is too low, fcoe_link_ok() | |
608 | * will return 0, so do this first. | |
609 | */ | |
7221d7e5 YZ |
610 | mfs = netdev->mtu; |
611 | if (netdev->features & NETIF_F_FCOE_MTU) { | |
612 | mfs = FCOE_MTU; | |
613 | FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); | |
614 | } | |
615 | mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); | |
1875f27e | 616 | if (fc_set_mfs(lport, mfs)) |
7f349142 VD |
617 | return -EINVAL; |
618 | ||
7f349142 | 619 | /* offload features support */ |
1d1b88dc | 620 | if (netdev->features & NETIF_F_SG) |
1875f27e | 621 | lport->sg_supp = 1; |
7f349142 | 622 | |
7f349142 | 623 | if (netdev->features & NETIF_F_FCOE_CRC) { |
1875f27e | 624 | lport->crc_offload = 1; |
d5488eb9 | 625 | FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); |
7f349142 | 626 | } |
7f349142 | 627 | if (netdev->features & NETIF_F_FSO) { |
1875f27e RL |
628 | lport->seq_offload = 1; |
629 | lport->lso_max = netdev->gso_max_size; | |
d5488eb9 | 630 | FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", |
1875f27e | 631 | lport->lso_max); |
7f349142 | 632 | } |
7f349142 | 633 | if (netdev->fcoe_ddp_xid) { |
1875f27e RL |
634 | lport->lro_enabled = 1; |
635 | lport->lro_xid = netdev->fcoe_ddp_xid; | |
d5488eb9 | 636 | FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", |
1875f27e | 637 | lport->lro_xid); |
7f349142 | 638 | } |
014f5c3f CL |
639 | skb_queue_head_init(&port->fcoe_pending_queue); |
640 | port->fcoe_pending_queue_active = 0; | |
1875f27e | 641 | setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport); |
7f349142 | 642 | |
5e4f8fe7 RL |
643 | fcoe_link_speed_update(lport); |
644 | ||
1875f27e | 645 | if (!lport->vport) { |
cc0136c2 YZ |
646 | /* |
647 | * Use NAA 1&2 (FC-FS Rev. 2.0, Sec. 15) to generate WWNN/WWPN: | |
648 | * For WWNN, we use NAA 1 w/ bit 27-16 of word 0 as 0. | |
649 | * For WWPN, we use NAA 2 w/ bit 27-16 of word 0 from VLAN ID | |
650 | */ | |
651 | if (netdev->priv_flags & IFF_802_1Q_VLAN) | |
652 | vid = vlan_dev_vlan_id(netdev); | |
dcece412 YZ |
653 | |
654 | if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN)) | |
655 | wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0); | |
1875f27e | 656 | fc_set_wwnn(lport, wwnn); |
dcece412 YZ |
657 | if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN)) |
658 | wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, | |
659 | 2, vid); | |
1875f27e | 660 | fc_set_wwpn(lport, wwpn); |
9a05753b | 661 | } |
7f349142 | 662 | |
7f349142 VD |
663 | return 0; |
664 | } | |
665 | ||
666 | /** | |
1875f27e RL |
667 | * fcoe_shost_config() - Set up the SCSI host associated with a local port |
668 | * @lport: The local port | |
1875f27e | 669 | * @dev: The device associated with the SCSI host |
7f349142 VD |
670 | * |
671 | * Must be called after fcoe_lport_config() and fcoe_netdev_config() | |
672 | * | |
1875f27e | 673 | * Returns: 0 for success |
7f349142 | 674 | */ |
8ba00a4b | 675 | static int fcoe_shost_config(struct fc_lport *lport, struct device *dev) |
7f349142 VD |
676 | { |
677 | int rc = 0; | |
678 | ||
679 | /* lport scsi host config */ | |
1875f27e RL |
680 | lport->host->max_lun = FCOE_MAX_LUN; |
681 | lport->host->max_id = FCOE_MAX_FCP_TARGET; | |
682 | lport->host->max_channel = 0; | |
da87bfab VD |
683 | lport->host->max_cmd_len = FCOE_MAX_CMD_LEN; |
684 | ||
1875f27e RL |
685 | if (lport->vport) |
686 | lport->host->transportt = fcoe_vport_transport_template; | |
e9084bb8 | 687 | else |
1875f27e | 688 | lport->host->transportt = fcoe_transport_template; |
7f349142 VD |
689 | |
690 | /* add the new host to the SCSI-ml */ | |
1875f27e | 691 | rc = scsi_add_host(lport->host, dev); |
7f349142 | 692 | if (rc) { |
1875f27e | 693 | FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " |
d5488eb9 | 694 | "error on scsi_add_host\n"); |
7f349142 VD |
695 | return rc; |
696 | } | |
9a05753b | 697 | |
1875f27e | 698 | if (!lport->vport) |
4be929be | 699 | fc_host_max_npiv_vports(lport->host) = USHRT_MAX; |
9a05753b | 700 | |
1875f27e | 701 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, |
5baa17c3 | 702 | "%s v%s over %s", FCOE_NAME, FCOE_VERSION, |
1875f27e | 703 | fcoe_netdev(lport)->name); |
7f349142 VD |
704 | |
705 | return 0; | |
706 | } | |
707 | ||
1875f27e RL |
708 | /** |
709 | * fcoe_oem_match() - The match routine for the offloaded exchange manager | |
710 | * @fp: The I/O frame | |
d7179680 | 711 | * |
1875f27e RL |
712 | * This routine will be associated with an exchange manager (EM). When |
713 | * the libfc exchange handling code is looking for an EM to use it will | |
714 | * call this routine and pass it the frame that it wishes to send. This | |
715 | * routine will return True if the associated EM is to be used and False | |
716 | * if the echange code should continue looking for an EM. | |
717 | * | |
718 | * The offload EM that this routine is associated with will handle any | |
719 | * packets that are for SCSI read requests. | |
720 | * | |
721 | * Returns: True for read types I/O, otherwise returns false. | |
d7179680 VD |
722 | */ |
723 | bool fcoe_oem_match(struct fc_frame *fp) | |
724 | { | |
05cc7390 YZ |
725 | return fc_fcp_is_read(fr_fsp(fp)) && |
726 | (fr_fsp(fp)->data_len > fcoe_ddp_min); | |
d7179680 VD |
727 | } |
728 | ||
7f349142 | 729 | /** |
1875f27e RL |
730 | * fcoe_em_config() - Allocate and configure an exchange manager |
731 | * @lport: The local port that the new EM will be associated with | |
7f349142 | 732 | * |
1875f27e | 733 | * Returns: 0 on success |
7f349142 | 734 | */ |
1875f27e | 735 | static inline int fcoe_em_config(struct fc_lport *lport) |
7f349142 | 736 | { |
1875f27e | 737 | struct fcoe_port *port = lport_priv(lport); |
25024989 CL |
738 | struct fcoe_interface *fcoe = port->fcoe; |
739 | struct fcoe_interface *oldfcoe = NULL; | |
1d1b88dc | 740 | struct net_device *old_real_dev, *cur_real_dev; |
d7179680 VD |
741 | u16 min_xid = FCOE_MIN_XID; |
742 | u16 max_xid = FCOE_MAX_XID; | |
743 | ||
744 | /* | |
745 | * Check if need to allocate an em instance for | |
746 | * offload exchange ids to be shared across all VN_PORTs/lport. | |
747 | */ | |
1875f27e RL |
748 | if (!lport->lro_enabled || !lport->lro_xid || |
749 | (lport->lro_xid >= max_xid)) { | |
750 | lport->lro_xid = 0; | |
d7179680 VD |
751 | goto skip_oem; |
752 | } | |
753 | ||
754 | /* | |
755 | * Reuse existing offload em instance in case | |
1d1b88dc | 756 | * it is already allocated on real eth device |
d7179680 | 757 | */ |
25024989 CL |
758 | if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
759 | cur_real_dev = vlan_dev_real_dev(fcoe->netdev); | |
1d1b88dc | 760 | else |
25024989 | 761 | cur_real_dev = fcoe->netdev; |
1d1b88dc | 762 | |
25024989 | 763 | list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { |
25024989 CL |
764 | if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
765 | old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); | |
1d1b88dc | 766 | else |
25024989 | 767 | old_real_dev = oldfcoe->netdev; |
1d1b88dc VD |
768 | |
769 | if (cur_real_dev == old_real_dev) { | |
991cbb60 | 770 | fcoe->oem = oldfcoe->oem; |
d7179680 VD |
771 | break; |
772 | } | |
773 | } | |
774 | ||
991cbb60 | 775 | if (fcoe->oem) { |
1875f27e | 776 | if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { |
d7179680 VD |
777 | printk(KERN_ERR "fcoe_em_config: failed to add " |
778 | "offload em:%p on interface:%s\n", | |
991cbb60 | 779 | fcoe->oem, fcoe->netdev->name); |
d7179680 VD |
780 | return -ENOMEM; |
781 | } | |
782 | } else { | |
1875f27e RL |
783 | fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, |
784 | FCOE_MIN_XID, lport->lro_xid, | |
785 | fcoe_oem_match); | |
991cbb60 | 786 | if (!fcoe->oem) { |
d7179680 VD |
787 | printk(KERN_ERR "fcoe_em_config: failed to allocate " |
788 | "em for offload exches on interface:%s\n", | |
25024989 | 789 | fcoe->netdev->name); |
d7179680 VD |
790 | return -ENOMEM; |
791 | } | |
792 | } | |
793 | ||
794 | /* | |
795 | * Exclude offload EM xid range from next EM xid range. | |
796 | */ | |
1875f27e | 797 | min_xid += lport->lro_xid + 1; |
d7179680 VD |
798 | |
799 | skip_oem: | |
1875f27e | 800 | if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { |
d7179680 | 801 | printk(KERN_ERR "fcoe_em_config: failed to " |
25024989 | 802 | "allocate em on interface %s\n", fcoe->netdev->name); |
7f349142 | 803 | return -ENOMEM; |
d7179680 | 804 | } |
7f349142 VD |
805 | |
806 | return 0; | |
807 | } | |
808 | ||
809 | /** | |
1875f27e RL |
810 | * fcoe_if_destroy() - Tear down a SW FCoE instance |
811 | * @lport: The local port to be destroyed | |
34ce27bc VD |
812 | * |
813 | * Locking: must be called with the RTNL mutex held and RTNL mutex | |
814 | * needed to be dropped by this function since not dropping RTNL | |
815 | * would cause circular locking warning on synchronous fip worker | |
816 | * cancelling thru fcoe_interface_put invoked by this function. | |
817 | * | |
7f349142 | 818 | */ |
af7f85d9 | 819 | static void fcoe_if_destroy(struct fc_lport *lport) |
7f349142 | 820 | { |
014f5c3f CL |
821 | struct fcoe_port *port = lport_priv(lport); |
822 | struct fcoe_interface *fcoe = port->fcoe; | |
25024989 | 823 | struct net_device *netdev = fcoe->netdev; |
7f349142 | 824 | |
d5488eb9 | 825 | FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); |
7f349142 | 826 | |
7f349142 | 827 | /* Logout of the fabric */ |
af7f85d9 | 828 | fc_fabric_logoff(lport); |
7f349142 | 829 | |
54b649f8 CL |
830 | /* Cleanup the fc_lport */ |
831 | fc_lport_destroy(lport); | |
832 | fc_fcp_destroy(lport); | |
833 | ||
834 | /* Stop the transmit retry timer */ | |
835 | del_timer_sync(&port->timer); | |
ab6b85c1 | 836 | |
54b649f8 CL |
837 | /* Free existing transmit skbs */ |
838 | fcoe_clean_pending_queue(lport); | |
839 | ||
11b56188 | 840 | if (!is_zero_ether_addr(port->data_src_addr)) |
a748ee24 | 841 | dev_uc_del(netdev, port->data_src_addr); |
11b56188 CL |
842 | rtnl_unlock(); |
843 | ||
54b649f8 CL |
844 | /* receives may not be stopped until after this */ |
845 | fcoe_interface_put(fcoe); | |
7f349142 | 846 | |
f161fb72 | 847 | /* Free queued packets for the per-CPU receive threads */ |
af7f85d9 | 848 | fcoe_percpu_clean(lport); |
f161fb72 | 849 | |
7f349142 | 850 | /* Detach from the scsi-ml */ |
af7f85d9 CL |
851 | fc_remove_host(lport->host); |
852 | scsi_remove_host(lport->host); | |
7f349142 VD |
853 | |
854 | /* There are no more rports or I/O, free the EM */ | |
af7f85d9 | 855 | fc_exch_mgr_free(lport); |
7f349142 | 856 | |
7f349142 | 857 | /* Free memory used by statistical counters */ |
af7f85d9 | 858 | fc_lport_free_stats(lport); |
7f349142 | 859 | |
2e70e241 | 860 | /* Release the Scsi_Host */ |
af7f85d9 | 861 | scsi_host_put(lport->host); |
15af974d | 862 | module_put(THIS_MODULE); |
7f349142 VD |
863 | } |
864 | ||
1875f27e RL |
865 | /** |
866 | * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device | |
867 | * @lport: The local port to setup DDP for | |
868 | * @xid: The exchange ID for this DDP transfer | |
869 | * @sgl: The scatterlist describing this transfer | |
870 | * @sgc: The number of sg items | |
7f349142 | 871 | * |
1875f27e | 872 | * Returns: 0 if the DDP context was not configured |
7f349142 | 873 | */ |
1875f27e RL |
874 | static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, |
875 | struct scatterlist *sgl, unsigned int sgc) | |
7f349142 | 876 | { |
1875f27e | 877 | struct net_device *netdev = fcoe_netdev(lport); |
7f349142 | 878 | |
1875f27e RL |
879 | if (netdev->netdev_ops->ndo_fcoe_ddp_setup) |
880 | return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, | |
881 | xid, sgl, | |
882 | sgc); | |
7f349142 VD |
883 | |
884 | return 0; | |
885 | } | |
886 | ||
1875f27e RL |
887 | /** |
888 | * fcoe_ddp_done() - Call a LLD's ddp_done through the net device | |
889 | * @lport: The local port to complete DDP on | |
890 | * @xid: The exchange ID for this DDP transfer | |
7f349142 | 891 | * |
1875f27e | 892 | * Returns: the length of data that have been completed by DDP |
7f349142 | 893 | */ |
1875f27e | 894 | static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) |
7f349142 | 895 | { |
1875f27e | 896 | struct net_device *netdev = fcoe_netdev(lport); |
7f349142 | 897 | |
1875f27e RL |
898 | if (netdev->netdev_ops->ndo_fcoe_ddp_done) |
899 | return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); | |
7f349142 VD |
900 | return 0; |
901 | } | |
902 | ||
7f349142 | 903 | /** |
1875f27e RL |
904 | * fcoe_if_create() - Create a FCoE instance on an interface |
905 | * @fcoe: The FCoE interface to create a local port on | |
906 | * @parent: The device pointer to be the parent in sysfs for the SCSI host | |
907 | * @npiv: Indicates if the port is a vport or not | |
7f349142 | 908 | * |
1875f27e | 909 | * Creates a fc_lport instance and a Scsi_Host instance and configure them. |
7f349142 | 910 | * |
1875f27e | 911 | * Returns: The allocated fc_lport or an error pointer |
7f349142 | 912 | */ |
030f4e00 | 913 | static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, |
9a05753b | 914 | struct device *parent, int npiv) |
7f349142 | 915 | { |
1875f27e | 916 | struct net_device *netdev = fcoe->netdev; |
af7f85d9 | 917 | struct fc_lport *lport = NULL; |
014f5c3f | 918 | struct fcoe_port *port; |
1875f27e | 919 | int rc; |
9a05753b CL |
920 | /* |
921 | * parent is only a vport if npiv is 1, | |
922 | * but we'll only use vport in that case so go ahead and set it | |
923 | */ | |
924 | struct fc_vport *vport = dev_to_vport(parent); | |
7f349142 | 925 | |
d5488eb9 | 926 | FCOE_NETDEV_DBG(netdev, "Create Interface\n"); |
7f349142 | 927 | |
9a05753b CL |
928 | if (!npiv) { |
929 | lport = libfc_host_alloc(&fcoe_shost_template, | |
930 | sizeof(struct fcoe_port)); | |
931 | } else { | |
932 | lport = libfc_vport_create(vport, | |
933 | sizeof(struct fcoe_port)); | |
934 | } | |
86221969 | 935 | if (!lport) { |
d5488eb9 | 936 | FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); |
af7f85d9 | 937 | rc = -ENOMEM; |
030f4e00 | 938 | goto out; |
7f349142 | 939 | } |
014f5c3f | 940 | port = lport_priv(lport); |
2e70e241 | 941 | port->lport = lport; |
014f5c3f | 942 | port->fcoe = fcoe; |
2e70e241 | 943 | INIT_WORK(&port->destroy_work, fcoe_destroy_work); |
7f349142 | 944 | |
1875f27e | 945 | /* configure a fc_lport including the exchange manager */ |
af7f85d9 | 946 | rc = fcoe_lport_config(lport); |
7f349142 | 947 | if (rc) { |
d5488eb9 RL |
948 | FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " |
949 | "interface\n"); | |
7f349142 VD |
950 | goto out_host_put; |
951 | } | |
952 | ||
9a05753b | 953 | if (npiv) { |
9f8f3aa6 CL |
954 | FCOE_NETDEV_DBG(netdev, "Setting vport names, " |
955 | "%16.16llx %16.16llx\n", | |
1875f27e | 956 | vport->node_name, vport->port_name); |
9a05753b CL |
957 | fc_set_wwnn(lport, vport->node_name); |
958 | fc_set_wwpn(lport, vport->port_name); | |
959 | } | |
960 | ||
ab6b85c1 | 961 | /* configure lport network properties */ |
af7f85d9 | 962 | rc = fcoe_netdev_config(lport, netdev); |
ab6b85c1 | 963 | if (rc) { |
d5488eb9 RL |
964 | FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " |
965 | "interface\n"); | |
54b649f8 | 966 | goto out_lp_destroy; |
ab6b85c1 | 967 | } |
97c8389d | 968 | |
7f349142 | 969 | /* configure lport scsi host properties */ |
8ba00a4b | 970 | rc = fcoe_shost_config(lport, parent); |
7f349142 | 971 | if (rc) { |
d5488eb9 RL |
972 | FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " |
973 | "interface\n"); | |
54b649f8 | 974 | goto out_lp_destroy; |
7f349142 VD |
975 | } |
976 | ||
96316099 | 977 | /* Initialize the library */ |
e10f8c66 | 978 | rc = fcoe_libfc_config(lport, &fcoe->ctlr, &fcoe_libfc_fcn_templ, 1); |
7f349142 | 979 | if (rc) { |
96316099 | 980 | FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " |
d5488eb9 | 981 | "interface\n"); |
96316099 | 982 | goto out_lp_destroy; |
7f349142 VD |
983 | } |
984 | ||
9a05753b CL |
985 | if (!npiv) { |
986 | /* | |
987 | * fcoe_em_alloc() and fcoe_hostlist_add() both | |
988 | * need to be atomic with respect to other changes to the | |
989 | * hostlist since fcoe_em_alloc() looks for an existing EM | |
990 | * instance on host list updated by fcoe_hostlist_add(). | |
991 | * | |
992 | * This is currently handled through the fcoe_config_mutex | |
993 | * begin held. | |
994 | */ | |
c863df33 | 995 | |
9a05753b CL |
996 | /* lport exch manager allocation */ |
997 | rc = fcoe_em_config(lport); | |
998 | if (rc) { | |
999 | FCOE_NETDEV_DBG(netdev, "Could not configure the EM " | |
1875f27e | 1000 | "for the interface\n"); |
9a05753b CL |
1001 | goto out_lp_destroy; |
1002 | } | |
7f349142 VD |
1003 | } |
1004 | ||
030f4e00 | 1005 | fcoe_interface_get(fcoe); |
af7f85d9 | 1006 | return lport; |
7f349142 VD |
1007 | |
1008 | out_lp_destroy: | |
af7f85d9 | 1009 | fc_exch_mgr_free(lport); |
7f349142 | 1010 | out_host_put: |
af7f85d9 CL |
1011 | scsi_host_put(lport->host); |
1012 | out: | |
1013 | return ERR_PTR(rc); | |
7f349142 VD |
1014 | } |
1015 | ||
1016 | /** | |
1875f27e | 1017 | * fcoe_if_init() - Initialization routine for fcoe.ko |
7f349142 | 1018 | * |
1875f27e RL |
1019 | * Attaches the SW FCoE transport to the FC transport |
1020 | * | |
1021 | * Returns: 0 on success | |
7f349142 VD |
1022 | */ |
1023 | static int __init fcoe_if_init(void) | |
1024 | { | |
1025 | /* attach to scsi transport */ | |
e9084bb8 CL |
1026 | fcoe_transport_template = fc_attach_transport(&fcoe_transport_function); |
1027 | fcoe_vport_transport_template = | |
1028 | fc_attach_transport(&fcoe_vport_transport_function); | |
7f349142 | 1029 | |
e9084bb8 | 1030 | if (!fcoe_transport_template) { |
d5488eb9 | 1031 | printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); |
7f349142 VD |
1032 | return -ENODEV; |
1033 | } | |
1034 | ||
1035 | return 0; | |
1036 | } | |
1037 | ||
1038 | /** | |
1875f27e RL |
1039 | * fcoe_if_exit() - Tear down fcoe.ko |
1040 | * | |
1041 | * Detaches the SW FCoE transport from the FC transport | |
7f349142 | 1042 | * |
1875f27e | 1043 | * Returns: 0 on success |
7f349142 VD |
1044 | */ |
1045 | int __exit fcoe_if_exit(void) | |
1046 | { | |
e9084bb8 CL |
1047 | fc_release_transport(fcoe_transport_template); |
1048 | fc_release_transport(fcoe_vport_transport_template); | |
1049 | fcoe_transport_template = NULL; | |
1050 | fcoe_vport_transport_template = NULL; | |
7f349142 VD |
1051 | return 0; |
1052 | } | |
1053 | ||
8976f424 | 1054 | /** |
1875f27e RL |
1055 | * fcoe_percpu_thread_create() - Create a receive thread for an online CPU |
1056 | * @cpu: The CPU index of the CPU to create a receive thread for | |
8976f424 RL |
1057 | */ |
1058 | static void fcoe_percpu_thread_create(unsigned int cpu) | |
1059 | { | |
1060 | struct fcoe_percpu_s *p; | |
1061 | struct task_struct *thread; | |
1062 | ||
1063 | p = &per_cpu(fcoe_percpu, cpu); | |
1064 | ||
1065 | thread = kthread_create(fcoe_percpu_receive_thread, | |
1066 | (void *)p, "fcoethread/%d", cpu); | |
1067 | ||
e7a51997 | 1068 | if (likely(!IS_ERR(thread))) { |
8976f424 RL |
1069 | kthread_bind(thread, cpu); |
1070 | wake_up_process(thread); | |
1071 | ||
1072 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1073 | p->thread = thread; | |
1074 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1075 | } | |
1076 | } | |
1077 | ||
1078 | /** | |
1875f27e RL |
1079 | * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU |
1080 | * @cpu: The CPU index of the CPU whose receive thread is to be destroyed | |
8976f424 RL |
1081 | * |
1082 | * Destroys a per-CPU Rx thread. Any pending skbs are moved to the | |
1083 | * current CPU's Rx thread. If the thread being destroyed is bound to | |
1084 | * the CPU processing this context the skbs will be freed. | |
1085 | */ | |
1086 | static void fcoe_percpu_thread_destroy(unsigned int cpu) | |
1087 | { | |
1088 | struct fcoe_percpu_s *p; | |
1089 | struct task_struct *thread; | |
1090 | struct page *crc_eof; | |
1091 | struct sk_buff *skb; | |
1092 | #ifdef CONFIG_SMP | |
1093 | struct fcoe_percpu_s *p0; | |
f018b73a | 1094 | unsigned targ_cpu = get_cpu(); |
8976f424 RL |
1095 | #endif /* CONFIG_SMP */ |
1096 | ||
d5488eb9 | 1097 | FCOE_DBG("Destroying receive thread for CPU %d\n", cpu); |
8976f424 RL |
1098 | |
1099 | /* Prevent any new skbs from being queued for this CPU. */ | |
1100 | p = &per_cpu(fcoe_percpu, cpu); | |
1101 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1102 | thread = p->thread; | |
1103 | p->thread = NULL; | |
1104 | crc_eof = p->crc_eof_page; | |
1105 | p->crc_eof_page = NULL; | |
1106 | p->crc_eof_offset = 0; | |
1107 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1108 | ||
1109 | #ifdef CONFIG_SMP | |
1110 | /* | |
1111 | * Don't bother moving the skb's if this context is running | |
1112 | * on the same CPU that is having its thread destroyed. This | |
1113 | * can easily happen when the module is removed. | |
1114 | */ | |
1115 | if (cpu != targ_cpu) { | |
1116 | p0 = &per_cpu(fcoe_percpu, targ_cpu); | |
1117 | spin_lock_bh(&p0->fcoe_rx_list.lock); | |
1118 | if (p0->thread) { | |
d5488eb9 RL |
1119 | FCOE_DBG("Moving frames from CPU %d to CPU %d\n", |
1120 | cpu, targ_cpu); | |
8976f424 RL |
1121 | |
1122 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1123 | __skb_queue_tail(&p0->fcoe_rx_list, skb); | |
1124 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
1125 | } else { | |
1126 | /* | |
1127 | * The targeted CPU is not initialized and cannot accept | |
1875f27e | 1128 | * new skbs. Unlock the targeted CPU and drop the skbs |
8976f424 RL |
1129 | * on the CPU that is going offline. |
1130 | */ | |
1131 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1132 | kfree_skb(skb); | |
1133 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
1134 | } | |
1135 | } else { | |
1136 | /* | |
1137 | * This scenario occurs when the module is being removed | |
1138 | * and all threads are being destroyed. skbs will continue | |
1139 | * to be shifted from the CPU thread that is being removed | |
1140 | * to the CPU thread associated with the CPU that is processing | |
1141 | * the module removal. Once there is only one CPU Rx thread it | |
1142 | * will reach this case and we will drop all skbs and later | |
1143 | * stop the thread. | |
1144 | */ | |
1145 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1146 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1147 | kfree_skb(skb); | |
1148 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1149 | } | |
f018b73a | 1150 | put_cpu(); |
8976f424 RL |
1151 | #else |
1152 | /* | |
dd3fd72e | 1153 | * This a non-SMP scenario where the singular Rx thread is |
8976f424 RL |
1154 | * being removed. Free all skbs and stop the thread. |
1155 | */ | |
1156 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1157 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1158 | kfree_skb(skb); | |
1159 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1160 | #endif | |
1161 | ||
1162 | if (thread) | |
1163 | kthread_stop(thread); | |
1164 | ||
1165 | if (crc_eof) | |
1166 | put_page(crc_eof); | |
1167 | } | |
1168 | ||
1169 | /** | |
1875f27e RL |
1170 | * fcoe_cpu_callback() - Handler for CPU hotplug events |
1171 | * @nfb: The callback data block | |
1172 | * @action: The event triggering the callback | |
1173 | * @hcpu: The index of the CPU that the event is for | |
8976f424 | 1174 | * |
1875f27e | 1175 | * This creates or destroys per-CPU data for fcoe |
8976f424 RL |
1176 | * |
1177 | * Returns NOTIFY_OK always. | |
1178 | */ | |
1179 | static int fcoe_cpu_callback(struct notifier_block *nfb, | |
1180 | unsigned long action, void *hcpu) | |
1181 | { | |
1182 | unsigned cpu = (unsigned long)hcpu; | |
1183 | ||
1184 | switch (action) { | |
1185 | case CPU_ONLINE: | |
1186 | case CPU_ONLINE_FROZEN: | |
d5488eb9 | 1187 | FCOE_DBG("CPU %x online: Create Rx thread\n", cpu); |
8976f424 RL |
1188 | fcoe_percpu_thread_create(cpu); |
1189 | break; | |
1190 | case CPU_DEAD: | |
1191 | case CPU_DEAD_FROZEN: | |
d5488eb9 | 1192 | FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu); |
8976f424 RL |
1193 | fcoe_percpu_thread_destroy(cpu); |
1194 | break; | |
1195 | default: | |
1196 | break; | |
1197 | } | |
1198 | return NOTIFY_OK; | |
1199 | } | |
1200 | ||
85b4aa49 | 1201 | /** |
1875f27e RL |
1202 | * fcoe_rcv() - Receive packets from a net device |
1203 | * @skb: The received packet | |
1204 | * @netdev: The net device that the packet was received on | |
1205 | * @ptype: The packet type context | |
1206 | * @olddev: The last device net device | |
85b4aa49 | 1207 | * |
1875f27e RL |
1208 | * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a |
1209 | * FC frame and passes the frame to libfc. | |
85b4aa49 RL |
1210 | * |
1211 | * Returns: 0 for success | |
34f42a07 | 1212 | */ |
1875f27e | 1213 | int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, |
85b4aa49 RL |
1214 | struct packet_type *ptype, struct net_device *olddev) |
1215 | { | |
1875f27e | 1216 | struct fc_lport *lport; |
85b4aa49 | 1217 | struct fcoe_rcv_info *fr; |
259ad85d | 1218 | struct fcoe_interface *fcoe; |
85b4aa49 | 1219 | struct fc_frame_header *fh; |
85b4aa49 | 1220 | struct fcoe_percpu_s *fps; |
519e5135 VD |
1221 | struct fcoe_port *port; |
1222 | struct ethhdr *eh; | |
b2f0091f | 1223 | unsigned int cpu; |
85b4aa49 | 1224 | |
259ad85d | 1225 | fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); |
1875f27e RL |
1226 | lport = fcoe->ctlr.lp; |
1227 | if (unlikely(!lport)) { | |
1228 | FCOE_NETDEV_DBG(netdev, "Cannot find hba structure"); | |
85b4aa49 RL |
1229 | goto err2; |
1230 | } | |
1875f27e | 1231 | if (!lport->link_up) |
97c8389d | 1232 | goto err2; |
85b4aa49 | 1233 | |
1875f27e | 1234 | FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p " |
d5488eb9 RL |
1235 | "data:%p tail:%p end:%p sum:%d dev:%s", |
1236 | skb->len, skb->data_len, skb->head, skb->data, | |
1237 | skb_tail_pointer(skb), skb_end_pointer(skb), | |
1238 | skb->csum, skb->dev ? skb->dev->name : "<NULL>"); | |
85b4aa49 | 1239 | |
519e5135 VD |
1240 | /* check for mac addresses */ |
1241 | eh = eth_hdr(skb); | |
1242 | port = lport_priv(lport); | |
1243 | if (compare_ether_addr(eh->h_dest, port->data_src_addr) && | |
1244 | compare_ether_addr(eh->h_dest, fcoe->ctlr.ctl_src_addr) && | |
1245 | compare_ether_addr(eh->h_dest, (u8[6])FC_FCOE_FLOGI_MAC)) { | |
1246 | FCOE_NETDEV_DBG(netdev, "wrong destination mac address:%pM\n", | |
1247 | eh->h_dest); | |
1248 | goto err; | |
1249 | } | |
1250 | ||
1251 | if (is_fip_mode(&fcoe->ctlr) && | |
1252 | compare_ether_addr(eh->h_source, fcoe->ctlr.dest_addr)) { | |
1253 | FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n", | |
1254 | eh->h_source); | |
85b4aa49 RL |
1255 | goto err; |
1256 | } | |
1257 | ||
1258 | /* | |
1259 | * Check for minimum frame length, and make sure required FCoE | |
1260 | * and FC headers are pulled into the linear data area. | |
1261 | */ | |
1262 | if (unlikely((skb->len < FCOE_MIN_FRAME) || | |
1875f27e | 1263 | !pskb_may_pull(skb, FCOE_HEADER_LEN))) |
85b4aa49 RL |
1264 | goto err; |
1265 | ||
1266 | skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); | |
1267 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1268 | ||
85b4aa49 | 1269 | fr = fcoe_dev_from_skb(skb); |
1875f27e | 1270 | fr->fr_dev = lport; |
85b4aa49 | 1271 | fr->ptype = ptype; |
5e5e92df | 1272 | |
85b4aa49 | 1273 | /* |
b2f0091f VD |
1274 | * In case the incoming frame's exchange is originated from |
1275 | * the initiator, then received frame's exchange id is ANDed | |
1276 | * with fc_cpu_mask bits to get the same cpu on which exchange | |
1277 | * was originated, otherwise just use the current cpu. | |
85b4aa49 | 1278 | */ |
b2f0091f VD |
1279 | if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) |
1280 | cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; | |
1281 | else | |
1282 | cpu = smp_processor_id(); | |
5e5e92df | 1283 | |
8976f424 | 1284 | fps = &per_cpu(fcoe_percpu, cpu); |
85b4aa49 | 1285 | spin_lock_bh(&fps->fcoe_rx_list.lock); |
8976f424 RL |
1286 | if (unlikely(!fps->thread)) { |
1287 | /* | |
1288 | * The targeted CPU is not ready, let's target | |
1289 | * the first CPU now. For non-SMP systems this | |
1290 | * will check the same CPU twice. | |
1291 | */ | |
1875f27e | 1292 | FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread " |
d5488eb9 RL |
1293 | "ready for incoming skb- using first online " |
1294 | "CPU.\n"); | |
8976f424 RL |
1295 | |
1296 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
6957177f | 1297 | cpu = cpumask_first(cpu_online_mask); |
8976f424 RL |
1298 | fps = &per_cpu(fcoe_percpu, cpu); |
1299 | spin_lock_bh(&fps->fcoe_rx_list.lock); | |
1300 | if (!fps->thread) { | |
1301 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1302 | goto err; | |
1303 | } | |
1304 | } | |
1305 | ||
1306 | /* | |
1307 | * We now have a valid CPU that we're targeting for | |
1308 | * this skb. We also have this receive thread locked, | |
1309 | * so we're free to queue skbs into it's queue. | |
1310 | */ | |
85b4aa49 | 1311 | |
859b7b64 CL |
1312 | /* If this is a SCSI-FCP frame, and this is already executing on the |
1313 | * correct CPU, and the queue for this CPU is empty, then go ahead | |
1314 | * and process the frame directly in the softirq context. | |
1315 | * This lets us process completions without context switching from the | |
1316 | * NET_RX softirq, to our receive processing thread, and then back to | |
1317 | * BLOCK softirq context. | |
1318 | */ | |
1319 | if (fh->fh_type == FC_TYPE_FCP && | |
1320 | cpu == smp_processor_id() && | |
1321 | skb_queue_empty(&fps->fcoe_rx_list)) { | |
1322 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1323 | fcoe_recv_frame(skb); | |
1324 | } else { | |
1325 | __skb_queue_tail(&fps->fcoe_rx_list, skb); | |
1326 | if (fps->fcoe_rx_list.qlen == 1) | |
1327 | wake_up_process(fps->thread); | |
1328 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1329 | } | |
85b4aa49 RL |
1330 | |
1331 | return 0; | |
1332 | err: | |
f018b73a JE |
1333 | per_cpu_ptr(lport->dev_stats, get_cpu())->ErrorFrames++; |
1334 | put_cpu(); | |
85b4aa49 RL |
1335 | err2: |
1336 | kfree_skb(skb); | |
1337 | return -1; | |
1338 | } | |
85b4aa49 RL |
1339 | |
1340 | /** | |
1875f27e RL |
1341 | * fcoe_start_io() - Start FCoE I/O |
1342 | * @skb: The packet to be transmitted | |
1343 | * | |
1344 | * This routine is called from the net device to start transmitting | |
1345 | * FCoE packets. | |
85b4aa49 RL |
1346 | * |
1347 | * Returns: 0 for success | |
34f42a07 | 1348 | */ |
85b4aa49 RL |
1349 | static inline int fcoe_start_io(struct sk_buff *skb) |
1350 | { | |
18fa11ef | 1351 | struct sk_buff *nskb; |
85b4aa49 RL |
1352 | int rc; |
1353 | ||
18fa11ef CL |
1354 | nskb = skb_clone(skb, GFP_ATOMIC); |
1355 | rc = dev_queue_xmit(nskb); | |
85b4aa49 RL |
1356 | if (rc != 0) |
1357 | return rc; | |
1358 | kfree_skb(skb); | |
1359 | return 0; | |
1360 | } | |
1361 | ||
1362 | /** | |
1875f27e RL |
1363 | * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC |
1364 | * @skb: The packet to be transmitted | |
1365 | * @tlen: The total length of the trailer | |
1366 | * | |
1367 | * This routine allocates a page for frame trailers. The page is re-used if | |
1368 | * there is enough room left on it for the current trailer. If there isn't | |
1369 | * enough buffer left a new page is allocated for the trailer. Reference to | |
1370 | * the page from this function as well as the skbs using the page fragments | |
1371 | * ensure that the page is freed at the appropriate time. | |
85b4aa49 RL |
1372 | * |
1373 | * Returns: 0 for success | |
34f42a07 | 1374 | */ |
85b4aa49 RL |
1375 | static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen) |
1376 | { | |
1377 | struct fcoe_percpu_s *fps; | |
1378 | struct page *page; | |
85b4aa49 | 1379 | |
5e5e92df | 1380 | fps = &get_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1381 | page = fps->crc_eof_page; |
1382 | if (!page) { | |
1383 | page = alloc_page(GFP_ATOMIC); | |
1384 | if (!page) { | |
5e5e92df | 1385 | put_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1386 | return -ENOMEM; |
1387 | } | |
1388 | fps->crc_eof_page = page; | |
8976f424 | 1389 | fps->crc_eof_offset = 0; |
85b4aa49 RL |
1390 | } |
1391 | ||
1392 | get_page(page); | |
1393 | skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page, | |
1394 | fps->crc_eof_offset, tlen); | |
1395 | skb->len += tlen; | |
1396 | skb->data_len += tlen; | |
1397 | skb->truesize += tlen; | |
1398 | fps->crc_eof_offset += sizeof(struct fcoe_crc_eof); | |
1399 | ||
1400 | if (fps->crc_eof_offset >= PAGE_SIZE) { | |
1401 | fps->crc_eof_page = NULL; | |
1402 | fps->crc_eof_offset = 0; | |
1403 | put_page(page); | |
1404 | } | |
5e5e92df | 1405 | put_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1406 | return 0; |
1407 | } | |
1408 | ||
1409 | /** | |
1875f27e RL |
1410 | * fcoe_fc_crc() - Calculates the CRC for a given frame |
1411 | * @fp: The frame to be checksumed | |
85b4aa49 | 1412 | * |
1875f27e RL |
1413 | * This uses crc32() routine to calculate the CRC for a frame |
1414 | * | |
1415 | * Return: The 32 bit CRC value | |
34f42a07 | 1416 | */ |
85b4aa49 RL |
1417 | u32 fcoe_fc_crc(struct fc_frame *fp) |
1418 | { | |
1419 | struct sk_buff *skb = fp_skb(fp); | |
1420 | struct skb_frag_struct *frag; | |
1421 | unsigned char *data; | |
1422 | unsigned long off, len, clen; | |
1423 | u32 crc; | |
1424 | unsigned i; | |
1425 | ||
1426 | crc = crc32(~0, skb->data, skb_headlen(skb)); | |
1427 | ||
1428 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1429 | frag = &skb_shinfo(skb)->frags[i]; | |
1430 | off = frag->page_offset; | |
1431 | len = frag->size; | |
1432 | while (len > 0) { | |
1433 | clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK)); | |
1434 | data = kmap_atomic(frag->page + (off >> PAGE_SHIFT), | |
1435 | KM_SKB_DATA_SOFTIRQ); | |
1436 | crc = crc32(crc, data + (off & ~PAGE_MASK), clen); | |
1437 | kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ); | |
1438 | off += clen; | |
1439 | len -= clen; | |
1440 | } | |
1441 | } | |
1442 | return crc; | |
1443 | } | |
85b4aa49 RL |
1444 | |
1445 | /** | |
1875f27e RL |
1446 | * fcoe_xmit() - Transmit a FCoE frame |
1447 | * @lport: The local port that the frame is to be transmitted for | |
1448 | * @fp: The frame to be transmitted | |
85b4aa49 | 1449 | * |
1875f27e | 1450 | * Return: 0 for success |
34f42a07 | 1451 | */ |
1875f27e | 1452 | int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) |
85b4aa49 | 1453 | { |
4bb6b515 | 1454 | int wlen; |
85b4aa49 RL |
1455 | u32 crc; |
1456 | struct ethhdr *eh; | |
1457 | struct fcoe_crc_eof *cp; | |
1458 | struct sk_buff *skb; | |
1459 | struct fcoe_dev_stats *stats; | |
1460 | struct fc_frame_header *fh; | |
1461 | unsigned int hlen; /* header length implies the version */ | |
1462 | unsigned int tlen; /* trailer length */ | |
1463 | unsigned int elen; /* eth header, may include vlan */ | |
1875f27e | 1464 | struct fcoe_port *port = lport_priv(lport); |
3fe9a0ba | 1465 | struct fcoe_interface *fcoe = port->fcoe; |
85b4aa49 RL |
1466 | u8 sof, eof; |
1467 | struct fcoe_hdr *hp; | |
1468 | ||
1469 | WARN_ON((fr_len(fp) % sizeof(u32)) != 0); | |
1470 | ||
85b4aa49 | 1471 | fh = fc_frame_header_get(fp); |
97c8389d JE |
1472 | skb = fp_skb(fp); |
1473 | wlen = skb->len / FCOE_WORD_TO_BYTE; | |
1474 | ||
1875f27e | 1475 | if (!lport->link_up) { |
3caf02ee | 1476 | kfree_skb(skb); |
97c8389d | 1477 | return 0; |
85b4aa49 RL |
1478 | } |
1479 | ||
9860eeb4 | 1480 | if (unlikely(fh->fh_type == FC_TYPE_ELS) && |
1875f27e | 1481 | fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb)) |
97c8389d JE |
1482 | return 0; |
1483 | ||
85b4aa49 RL |
1484 | sof = fr_sof(fp); |
1485 | eof = fr_eof(fp); | |
1486 | ||
4e57e1cb | 1487 | elen = sizeof(struct ethhdr); |
85b4aa49 RL |
1488 | hlen = sizeof(struct fcoe_hdr); |
1489 | tlen = sizeof(struct fcoe_crc_eof); | |
1490 | wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; | |
1491 | ||
1492 | /* crc offload */ | |
1875f27e | 1493 | if (likely(lport->crc_offload)) { |
39ca9a06 | 1494 | skb->ip_summed = CHECKSUM_PARTIAL; |
85b4aa49 RL |
1495 | skb->csum_start = skb_headroom(skb); |
1496 | skb->csum_offset = skb->len; | |
1497 | crc = 0; | |
1498 | } else { | |
1499 | skb->ip_summed = CHECKSUM_NONE; | |
1500 | crc = fcoe_fc_crc(fp); | |
1501 | } | |
1502 | ||
014f5c3f | 1503 | /* copy port crc and eof to the skb buff */ |
85b4aa49 RL |
1504 | if (skb_is_nonlinear(skb)) { |
1505 | skb_frag_t *frag; | |
1506 | if (fcoe_get_paged_crc_eof(skb, tlen)) { | |
e9041581 | 1507 | kfree_skb(skb); |
85b4aa49 RL |
1508 | return -ENOMEM; |
1509 | } | |
1510 | frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; | |
1511 | cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ) | |
1512 | + frag->page_offset; | |
1513 | } else { | |
1514 | cp = (struct fcoe_crc_eof *)skb_put(skb, tlen); | |
1515 | } | |
1516 | ||
1517 | memset(cp, 0, sizeof(*cp)); | |
1518 | cp->fcoe_eof = eof; | |
1519 | cp->fcoe_crc32 = cpu_to_le32(~crc); | |
1520 | ||
1521 | if (skb_is_nonlinear(skb)) { | |
1522 | kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ); | |
1523 | cp = NULL; | |
1524 | } | |
1525 | ||
014f5c3f | 1526 | /* adjust skb network/transport offsets to match mac/fcoe/port */ |
85b4aa49 RL |
1527 | skb_push(skb, elen + hlen); |
1528 | skb_reset_mac_header(skb); | |
1529 | skb_reset_network_header(skb); | |
1530 | skb->mac_len = elen; | |
211c738d | 1531 | skb->protocol = htons(ETH_P_FCOE); |
3fe9a0ba | 1532 | skb->dev = fcoe->netdev; |
85b4aa49 RL |
1533 | |
1534 | /* fill up mac and fcoe headers */ | |
1535 | eh = eth_hdr(skb); | |
1536 | eh->h_proto = htons(ETH_P_FCOE); | |
3fe9a0ba | 1537 | if (fcoe->ctlr.map_dest) |
85b4aa49 RL |
1538 | fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id); |
1539 | else | |
1540 | /* insert GW address */ | |
3fe9a0ba | 1541 | memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN); |
85b4aa49 | 1542 | |
3fe9a0ba CL |
1543 | if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN)) |
1544 | memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN); | |
85b4aa49 | 1545 | else |
11b56188 | 1546 | memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); |
85b4aa49 RL |
1547 | |
1548 | hp = (struct fcoe_hdr *)(eh + 1); | |
1549 | memset(hp, 0, sizeof(*hp)); | |
1550 | if (FC_FCOE_VER) | |
1551 | FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); | |
1552 | hp->fcoe_sof = sof; | |
1553 | ||
39ca9a06 | 1554 | /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ |
1875f27e | 1555 | if (lport->seq_offload && fr_max_payload(fp)) { |
39ca9a06 YZ |
1556 | skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; |
1557 | skb_shinfo(skb)->gso_size = fr_max_payload(fp); | |
1558 | } else { | |
1559 | skb_shinfo(skb)->gso_type = 0; | |
1560 | skb_shinfo(skb)->gso_size = 0; | |
1561 | } | |
85b4aa49 | 1562 | /* update tx stats: regardless if LLD fails */ |
f018b73a | 1563 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); |
582b45bc RL |
1564 | stats->TxFrames++; |
1565 | stats->TxWords += wlen; | |
f018b73a | 1566 | put_cpu(); |
85b4aa49 RL |
1567 | |
1568 | /* send down to lld */ | |
1875f27e | 1569 | fr_dev(fp) = lport; |
014f5c3f | 1570 | if (port->fcoe_pending_queue.qlen) |
1875f27e | 1571 | fcoe_check_wait_queue(lport, skb); |
4bb6b515 | 1572 | else if (fcoe_start_io(skb)) |
1875f27e | 1573 | fcoe_check_wait_queue(lport, skb); |
85b4aa49 RL |
1574 | |
1575 | return 0; | |
1576 | } | |
85b4aa49 | 1577 | |
e7a51997 | 1578 | /** |
1875f27e RL |
1579 | * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion |
1580 | * @skb: The completed skb (argument required by destructor) | |
e7a51997 JE |
1581 | */ |
1582 | static void fcoe_percpu_flush_done(struct sk_buff *skb) | |
1583 | { | |
1584 | complete(&fcoe_flush_completion); | |
1585 | } | |
1586 | ||
34f42a07 | 1587 | /** |
859b7b64 CL |
1588 | * fcoe_recv_frame() - process a single received frame |
1589 | * @skb: frame to process | |
85b4aa49 | 1590 | */ |
859b7b64 | 1591 | static void fcoe_recv_frame(struct sk_buff *skb) |
85b4aa49 | 1592 | { |
85b4aa49 | 1593 | u32 fr_len; |
1875f27e | 1594 | struct fc_lport *lport; |
85b4aa49 RL |
1595 | struct fcoe_rcv_info *fr; |
1596 | struct fcoe_dev_stats *stats; | |
1597 | struct fc_frame_header *fh; | |
85b4aa49 RL |
1598 | struct fcoe_crc_eof crc_eof; |
1599 | struct fc_frame *fp; | |
014f5c3f | 1600 | struct fcoe_port *port; |
85b4aa49 RL |
1601 | struct fcoe_hdr *hp; |
1602 | ||
859b7b64 CL |
1603 | fr = fcoe_dev_from_skb(skb); |
1604 | lport = fr->fr_dev; | |
1605 | if (unlikely(!lport)) { | |
1606 | if (skb->destructor != fcoe_percpu_flush_done) | |
1607 | FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb"); | |
1608 | kfree_skb(skb); | |
1609 | return; | |
1610 | } | |
1611 | ||
1612 | FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d " | |
1613 | "head:%p data:%p tail:%p end:%p sum:%d dev:%s", | |
1614 | skb->len, skb->data_len, | |
1615 | skb->head, skb->data, skb_tail_pointer(skb), | |
1616 | skb_end_pointer(skb), skb->csum, | |
1617 | skb->dev ? skb->dev->name : "<NULL>"); | |
1618 | ||
859b7b64 CL |
1619 | port = lport_priv(lport); |
1620 | if (skb_is_nonlinear(skb)) | |
1621 | skb_linearize(skb); /* not ideal */ | |
859b7b64 CL |
1622 | |
1623 | /* | |
1624 | * Frame length checks and setting up the header pointers | |
1625 | * was done in fcoe_rcv already. | |
1626 | */ | |
1627 | hp = (struct fcoe_hdr *) skb_network_header(skb); | |
1628 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1629 | ||
f018b73a | 1630 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); |
859b7b64 CL |
1631 | if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { |
1632 | if (stats->ErrorFrames < 5) | |
1633 | printk(KERN_WARNING "fcoe: FCoE version " | |
1634 | "mismatch: The frame has " | |
1635 | "version %x, but the " | |
1636 | "initiator supports version " | |
1637 | "%x\n", FC_FCOE_DECAPS_VER(hp), | |
1638 | FC_FCOE_VER); | |
f018b73a | 1639 | goto drop; |
859b7b64 CL |
1640 | } |
1641 | ||
1642 | skb_pull(skb, sizeof(struct fcoe_hdr)); | |
1643 | fr_len = skb->len - sizeof(struct fcoe_crc_eof); | |
1644 | ||
1645 | stats->RxFrames++; | |
1646 | stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; | |
1647 | ||
1648 | fp = (struct fc_frame *)skb; | |
1649 | fc_frame_init(fp); | |
1650 | fr_dev(fp) = lport; | |
1651 | fr_sof(fp) = hp->fcoe_sof; | |
1652 | ||
1653 | /* Copy out the CRC and EOF trailer for access */ | |
f018b73a JE |
1654 | if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) |
1655 | goto drop; | |
859b7b64 CL |
1656 | fr_eof(fp) = crc_eof.fcoe_eof; |
1657 | fr_crc(fp) = crc_eof.fcoe_crc32; | |
f018b73a JE |
1658 | if (pskb_trim(skb, fr_len)) |
1659 | goto drop; | |
859b7b64 CL |
1660 | |
1661 | /* | |
1662 | * We only check CRC if no offload is available and if it is | |
1663 | * it's solicited data, in which case, the FCP layer would | |
1664 | * check it during the copy. | |
1665 | */ | |
1666 | if (lport->crc_offload && | |
1667 | skb->ip_summed == CHECKSUM_UNNECESSARY) | |
1668 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; | |
1669 | else | |
1670 | fr_flags(fp) |= FCPHF_CRC_UNCHECKED; | |
1671 | ||
1672 | fh = fc_frame_header_get(fp); | |
f018b73a JE |
1673 | if ((fh->fh_r_ctl != FC_RCTL_DD_SOL_DATA || |
1674 | fh->fh_type != FC_TYPE_FCP) && | |
1675 | (fr_flags(fp) & FCPHF_CRC_UNCHECKED)) { | |
859b7b64 CL |
1676 | if (le32_to_cpu(fr_crc(fp)) != |
1677 | ~crc32(~0, skb->data, fr_len)) { | |
1678 | if (stats->InvalidCRCCount < 5) | |
1679 | printk(KERN_WARNING "fcoe: dropping " | |
1680 | "frame with CRC error\n"); | |
1681 | stats->InvalidCRCCount++; | |
f018b73a | 1682 | goto drop; |
859b7b64 CL |
1683 | } |
1684 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; | |
1685 | } | |
f018b73a | 1686 | put_cpu(); |
859b7b64 | 1687 | fc_exch_recv(lport, fp); |
f018b73a JE |
1688 | return; |
1689 | ||
1690 | drop: | |
1691 | stats->ErrorFrames++; | |
1692 | put_cpu(); | |
1693 | kfree_skb(skb); | |
859b7b64 CL |
1694 | } |
1695 | ||
1696 | /** | |
1697 | * fcoe_percpu_receive_thread() - The per-CPU packet receive thread | |
1698 | * @arg: The per-CPU context | |
1699 | * | |
1700 | * Return: 0 for success | |
1701 | */ | |
1702 | int fcoe_percpu_receive_thread(void *arg) | |
1703 | { | |
1704 | struct fcoe_percpu_s *p = arg; | |
1705 | struct sk_buff *skb; | |
1706 | ||
4469c195 | 1707 | set_user_nice(current, -20); |
85b4aa49 RL |
1708 | |
1709 | while (!kthread_should_stop()) { | |
1710 | ||
1711 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1712 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) { | |
1713 | set_current_state(TASK_INTERRUPTIBLE); | |
1714 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1715 | schedule(); | |
1716 | set_current_state(TASK_RUNNING); | |
1717 | if (kthread_should_stop()) | |
1718 | return 0; | |
1719 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1720 | } | |
1721 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
859b7b64 | 1722 | fcoe_recv_frame(skb); |
85b4aa49 RL |
1723 | } |
1724 | return 0; | |
1725 | } | |
1726 | ||
85b4aa49 | 1727 | /** |
1875f27e RL |
1728 | * fcoe_check_wait_queue() - Attempt to clear the transmit backlog |
1729 | * @lport: The local port whose backlog is to be cleared | |
85b4aa49 | 1730 | * |
1875f27e RL |
1731 | * This empties the wait_queue, dequeues the head of the wait_queue queue |
1732 | * and calls fcoe_start_io() for each packet. If all skb have been | |
1733 | * transmitted it returns the qlen. If an error occurs it restores | |
1734 | * wait_queue (to try again later) and returns -1. | |
85b4aa49 | 1735 | * |
1875f27e RL |
1736 | * The wait_queue is used when the skb transmit fails. The failed skb |
1737 | * will go in the wait_queue which will be emptied by the timer function or | |
85b4aa49 | 1738 | * by the next skb transmit. |
34f42a07 | 1739 | */ |
1875f27e | 1740 | static void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb) |
85b4aa49 | 1741 | { |
1875f27e | 1742 | struct fcoe_port *port = lport_priv(lport); |
4bb6b515 | 1743 | int rc; |
85b4aa49 | 1744 | |
014f5c3f | 1745 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
4bb6b515 VD |
1746 | |
1747 | if (skb) | |
014f5c3f | 1748 | __skb_queue_tail(&port->fcoe_pending_queue, skb); |
4bb6b515 | 1749 | |
014f5c3f | 1750 | if (port->fcoe_pending_queue_active) |
c826a314 | 1751 | goto out; |
014f5c3f | 1752 | port->fcoe_pending_queue_active = 1; |
55c8bafb | 1753 | |
014f5c3f | 1754 | while (port->fcoe_pending_queue.qlen) { |
55c8bafb | 1755 | /* keep qlen > 0 until fcoe_start_io succeeds */ |
014f5c3f CL |
1756 | port->fcoe_pending_queue.qlen++; |
1757 | skb = __skb_dequeue(&port->fcoe_pending_queue); | |
55c8bafb | 1758 | |
014f5c3f | 1759 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
55c8bafb | 1760 | rc = fcoe_start_io(skb); |
014f5c3f | 1761 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
55c8bafb CL |
1762 | |
1763 | if (rc) { | |
014f5c3f | 1764 | __skb_queue_head(&port->fcoe_pending_queue, skb); |
55c8bafb | 1765 | /* undo temporary increment above */ |
014f5c3f | 1766 | port->fcoe_pending_queue.qlen--; |
55c8bafb | 1767 | break; |
85b4aa49 | 1768 | } |
55c8bafb | 1769 | /* undo temporary increment above */ |
014f5c3f | 1770 | port->fcoe_pending_queue.qlen--; |
85b4aa49 | 1771 | } |
55c8bafb | 1772 | |
014f5c3f | 1773 | if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH) |
1875f27e | 1774 | lport->qfull = 0; |
014f5c3f CL |
1775 | if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer)) |
1776 | mod_timer(&port->timer, jiffies + 2); | |
1777 | port->fcoe_pending_queue_active = 0; | |
c826a314 | 1778 | out: |
014f5c3f | 1779 | if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH) |
1875f27e | 1780 | lport->qfull = 1; |
014f5c3f | 1781 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
4bb6b515 | 1782 | return; |
85b4aa49 RL |
1783 | } |
1784 | ||
85b4aa49 | 1785 | /** |
1875f27e | 1786 | * fcoe_dev_setup() - Setup the link change notification interface |
34f42a07 | 1787 | */ |
b0d428ad | 1788 | static void fcoe_dev_setup(void) |
85b4aa49 | 1789 | { |
85b4aa49 RL |
1790 | register_netdevice_notifier(&fcoe_notifier); |
1791 | } | |
1792 | ||
1793 | /** | |
1875f27e | 1794 | * fcoe_dev_cleanup() - Cleanup the link change notification interface |
34f42a07 | 1795 | */ |
85b4aa49 RL |
1796 | static void fcoe_dev_cleanup(void) |
1797 | { | |
1798 | unregister_netdevice_notifier(&fcoe_notifier); | |
1799 | } | |
1800 | ||
1801 | /** | |
1875f27e RL |
1802 | * fcoe_device_notification() - Handler for net device events |
1803 | * @notifier: The context of the notification | |
1804 | * @event: The type of event | |
1805 | * @ptr: The net device that the event was on | |
85b4aa49 | 1806 | * |
1875f27e | 1807 | * This function is called by the Ethernet driver in case of link change event. |
85b4aa49 RL |
1808 | * |
1809 | * Returns: 0 for success | |
34f42a07 | 1810 | */ |
85b4aa49 RL |
1811 | static int fcoe_device_notification(struct notifier_block *notifier, |
1812 | ulong event, void *ptr) | |
1813 | { | |
1875f27e | 1814 | struct fc_lport *lport = NULL; |
1d1b88dc | 1815 | struct net_device *netdev = ptr; |
014f5c3f | 1816 | struct fcoe_interface *fcoe; |
2e70e241 | 1817 | struct fcoe_port *port; |
85b4aa49 | 1818 | struct fcoe_dev_stats *stats; |
97c8389d | 1819 | u32 link_possible = 1; |
85b4aa49 RL |
1820 | u32 mfs; |
1821 | int rc = NOTIFY_OK; | |
1822 | ||
014f5c3f | 1823 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
25024989 | 1824 | if (fcoe->netdev == netdev) { |
1875f27e | 1825 | lport = fcoe->ctlr.lp; |
85b4aa49 RL |
1826 | break; |
1827 | } | |
1828 | } | |
1875f27e | 1829 | if (!lport) { |
85b4aa49 RL |
1830 | rc = NOTIFY_DONE; |
1831 | goto out; | |
1832 | } | |
1833 | ||
85b4aa49 RL |
1834 | switch (event) { |
1835 | case NETDEV_DOWN: | |
1836 | case NETDEV_GOING_DOWN: | |
97c8389d | 1837 | link_possible = 0; |
85b4aa49 RL |
1838 | break; |
1839 | case NETDEV_UP: | |
1840 | case NETDEV_CHANGE: | |
85b4aa49 RL |
1841 | break; |
1842 | case NETDEV_CHANGEMTU: | |
7221d7e5 YZ |
1843 | if (netdev->features & NETIF_F_FCOE_MTU) |
1844 | break; | |
1d1b88dc VD |
1845 | mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + |
1846 | sizeof(struct fcoe_crc_eof)); | |
85b4aa49 | 1847 | if (mfs >= FC_MIN_MAX_FRAME) |
1875f27e | 1848 | fc_set_mfs(lport, mfs); |
85b4aa49 RL |
1849 | break; |
1850 | case NETDEV_REGISTER: | |
1851 | break; | |
2e70e241 CL |
1852 | case NETDEV_UNREGISTER: |
1853 | list_del(&fcoe->list); | |
1854 | port = lport_priv(fcoe->ctlr.lp); | |
1855 | fcoe_interface_cleanup(fcoe); | |
1856 | schedule_work(&port->destroy_work); | |
1857 | goto out; | |
1858 | break; | |
85b4aa49 | 1859 | default: |
1d1b88dc | 1860 | FCOE_NETDEV_DBG(netdev, "Unknown event %ld " |
d5488eb9 | 1861 | "from netdev netlink\n", event); |
85b4aa49 | 1862 | } |
5e4f8fe7 RL |
1863 | |
1864 | fcoe_link_speed_update(lport); | |
1865 | ||
1875f27e | 1866 | if (link_possible && !fcoe_link_ok(lport)) |
3fe9a0ba CL |
1867 | fcoe_ctlr_link_up(&fcoe->ctlr); |
1868 | else if (fcoe_ctlr_link_down(&fcoe->ctlr)) { | |
f018b73a | 1869 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); |
97c8389d | 1870 | stats->LinkFailureCount++; |
f018b73a | 1871 | put_cpu(); |
1875f27e | 1872 | fcoe_clean_pending_queue(lport); |
85b4aa49 RL |
1873 | } |
1874 | out: | |
1875 | return rc; | |
1876 | } | |
1877 | ||
1878 | /** | |
1875f27e RL |
1879 | * fcoe_if_to_netdev() - Parse a name buffer to get a net device |
1880 | * @buffer: The name of the net device | |
85b4aa49 | 1881 | * |
1875f27e | 1882 | * Returns: NULL or a ptr to net_device |
34f42a07 | 1883 | */ |
85b4aa49 RL |
1884 | static struct net_device *fcoe_if_to_netdev(const char *buffer) |
1885 | { | |
1886 | char *cp; | |
1887 | char ifname[IFNAMSIZ + 2]; | |
1888 | ||
1889 | if (buffer) { | |
1890 | strlcpy(ifname, buffer, IFNAMSIZ); | |
1891 | cp = ifname + strlen(ifname); | |
1892 | while (--cp >= ifname && *cp == '\n') | |
1893 | *cp = '\0'; | |
1894 | return dev_get_by_name(&init_net, ifname); | |
1895 | } | |
1896 | return NULL; | |
1897 | } | |
1898 | ||
55a66d3c VD |
1899 | /** |
1900 | * fcoe_disable() - Disables a FCoE interface | |
1901 | * @buffer: The name of the Ethernet interface to be disabled | |
1902 | * @kp: The associated kernel parameter | |
1903 | * | |
1904 | * Called from sysfs. | |
1905 | * | |
1906 | * Returns: 0 for success | |
1907 | */ | |
1908 | static int fcoe_disable(const char *buffer, struct kernel_param *kp) | |
1909 | { | |
1910 | struct fcoe_interface *fcoe; | |
1911 | struct net_device *netdev; | |
1912 | int rc = 0; | |
1913 | ||
1914 | mutex_lock(&fcoe_config_mutex); | |
1915 | #ifdef CONFIG_FCOE_MODULE | |
1916 | /* | |
1917 | * Make sure the module has been initialized, and is not about to be | |
1918 | * removed. Module paramter sysfs files are writable before the | |
1919 | * module_init function is called and after module_exit. | |
1920 | */ | |
1921 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
1922 | rc = -ENODEV; | |
1923 | goto out_nodev; | |
1924 | } | |
1925 | #endif | |
1926 | ||
1927 | netdev = fcoe_if_to_netdev(buffer); | |
1928 | if (!netdev) { | |
1929 | rc = -ENODEV; | |
1930 | goto out_nodev; | |
1931 | } | |
1932 | ||
34ce27bc VD |
1933 | if (!rtnl_trylock()) { |
1934 | dev_put(netdev); | |
1935 | mutex_unlock(&fcoe_config_mutex); | |
1936 | return restart_syscall(); | |
1937 | } | |
1938 | ||
55a66d3c VD |
1939 | fcoe = fcoe_hostlist_lookup_port(netdev); |
1940 | rtnl_unlock(); | |
1941 | ||
9ee50e48 | 1942 | if (fcoe) { |
9ee50e48 | 1943 | fcoe_ctlr_link_down(&fcoe->ctlr); |
9d4cbc05 | 1944 | fcoe_clean_pending_queue(fcoe->ctlr.lp); |
9ee50e48 | 1945 | } else |
55a66d3c VD |
1946 | rc = -ENODEV; |
1947 | ||
1948 | dev_put(netdev); | |
1949 | out_nodev: | |
1950 | mutex_unlock(&fcoe_config_mutex); | |
1951 | return rc; | |
1952 | } | |
1953 | ||
1954 | /** | |
1955 | * fcoe_enable() - Enables a FCoE interface | |
1956 | * @buffer: The name of the Ethernet interface to be enabled | |
1957 | * @kp: The associated kernel parameter | |
1958 | * | |
1959 | * Called from sysfs. | |
1960 | * | |
1961 | * Returns: 0 for success | |
1962 | */ | |
1963 | static int fcoe_enable(const char *buffer, struct kernel_param *kp) | |
1964 | { | |
1965 | struct fcoe_interface *fcoe; | |
1966 | struct net_device *netdev; | |
1967 | int rc = 0; | |
1968 | ||
1969 | mutex_lock(&fcoe_config_mutex); | |
1970 | #ifdef CONFIG_FCOE_MODULE | |
1971 | /* | |
1972 | * Make sure the module has been initialized, and is not about to be | |
1973 | * removed. Module paramter sysfs files are writable before the | |
1974 | * module_init function is called and after module_exit. | |
1975 | */ | |
1976 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
1977 | rc = -ENODEV; | |
1978 | goto out_nodev; | |
1979 | } | |
1980 | #endif | |
1981 | ||
1982 | netdev = fcoe_if_to_netdev(buffer); | |
1983 | if (!netdev) { | |
1984 | rc = -ENODEV; | |
1985 | goto out_nodev; | |
1986 | } | |
1987 | ||
34ce27bc VD |
1988 | if (!rtnl_trylock()) { |
1989 | dev_put(netdev); | |
1990 | mutex_unlock(&fcoe_config_mutex); | |
1991 | return restart_syscall(); | |
1992 | } | |
1993 | ||
55a66d3c VD |
1994 | fcoe = fcoe_hostlist_lookup_port(netdev); |
1995 | rtnl_unlock(); | |
1996 | ||
9d4cbc05 | 1997 | if (!fcoe) |
55a66d3c | 1998 | rc = -ENODEV; |
9d4cbc05 VD |
1999 | else if (!fcoe_link_ok(fcoe->ctlr.lp)) |
2000 | fcoe_ctlr_link_up(&fcoe->ctlr); | |
55a66d3c VD |
2001 | |
2002 | dev_put(netdev); | |
2003 | out_nodev: | |
2004 | mutex_unlock(&fcoe_config_mutex); | |
2005 | return rc; | |
2006 | } | |
2007 | ||
85b4aa49 | 2008 | /** |
1875f27e RL |
2009 | * fcoe_destroy() - Destroy a FCoE interface |
2010 | * @buffer: The name of the Ethernet interface to be destroyed | |
2011 | * @kp: The associated kernel parameter | |
2012 | * | |
2013 | * Called from sysfs. | |
85b4aa49 RL |
2014 | * |
2015 | * Returns: 0 for success | |
34f42a07 | 2016 | */ |
85b4aa49 RL |
2017 | static int fcoe_destroy(const char *buffer, struct kernel_param *kp) |
2018 | { | |
030f4e00 | 2019 | struct fcoe_interface *fcoe; |
2e70e241 | 2020 | struct net_device *netdev; |
8eca355f | 2021 | int rc = 0; |
85b4aa49 | 2022 | |
dfc1d0fe CL |
2023 | mutex_lock(&fcoe_config_mutex); |
2024 | #ifdef CONFIG_FCOE_MODULE | |
2025 | /* | |
2026 | * Make sure the module has been initialized, and is not about to be | |
2027 | * removed. Module paramter sysfs files are writable before the | |
2028 | * module_init function is called and after module_exit. | |
2029 | */ | |
2030 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
2031 | rc = -ENODEV; | |
2032 | goto out_nodev; | |
2033 | } | |
2034 | #endif | |
2035 | ||
85b4aa49 RL |
2036 | netdev = fcoe_if_to_netdev(buffer); |
2037 | if (!netdev) { | |
2038 | rc = -ENODEV; | |
2039 | goto out_nodev; | |
2040 | } | |
2e70e241 | 2041 | |
34ce27bc VD |
2042 | if (!rtnl_trylock()) { |
2043 | dev_put(netdev); | |
2044 | mutex_unlock(&fcoe_config_mutex); | |
2045 | return restart_syscall(); | |
2046 | } | |
2047 | ||
2e70e241 CL |
2048 | fcoe = fcoe_hostlist_lookup_port(netdev); |
2049 | if (!fcoe) { | |
090eb6c4 | 2050 | rtnl_unlock(); |
85b4aa49 RL |
2051 | rc = -ENODEV; |
2052 | goto out_putdev; | |
2053 | } | |
2e70e241 | 2054 | list_del(&fcoe->list); |
2e70e241 | 2055 | fcoe_interface_cleanup(fcoe); |
34ce27bc | 2056 | /* RTNL mutex is dropped by fcoe_if_destroy */ |
2e70e241 | 2057 | fcoe_if_destroy(fcoe->ctlr.lp); |
6409ea65 | 2058 | |
85b4aa49 RL |
2059 | out_putdev: |
2060 | dev_put(netdev); | |
2061 | out_nodev: | |
dfc1d0fe | 2062 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 RL |
2063 | return rc; |
2064 | } | |
2065 | ||
1875f27e RL |
2066 | /** |
2067 | * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context | |
2068 | * @work: Handle to the FCoE port to be destroyed | |
2069 | */ | |
2e70e241 CL |
2070 | static void fcoe_destroy_work(struct work_struct *work) |
2071 | { | |
2072 | struct fcoe_port *port; | |
2073 | ||
2074 | port = container_of(work, struct fcoe_port, destroy_work); | |
2075 | mutex_lock(&fcoe_config_mutex); | |
34ce27bc VD |
2076 | rtnl_lock(); |
2077 | /* RTNL mutex is dropped by fcoe_if_destroy */ | |
2e70e241 CL |
2078 | fcoe_if_destroy(port->lport); |
2079 | mutex_unlock(&fcoe_config_mutex); | |
2080 | } | |
2081 | ||
85b4aa49 | 2082 | /** |
1875f27e RL |
2083 | * fcoe_create() - Create a fcoe interface |
2084 | * @buffer: The name of the Ethernet interface to create on | |
2085 | * @kp: The associated kernel param | |
2086 | * | |
2087 | * Called from sysfs. | |
85b4aa49 RL |
2088 | * |
2089 | * Returns: 0 for success | |
34f42a07 | 2090 | */ |
85b4aa49 RL |
2091 | static int fcoe_create(const char *buffer, struct kernel_param *kp) |
2092 | { | |
2093 | int rc; | |
030f4e00 | 2094 | struct fcoe_interface *fcoe; |
af7f85d9 | 2095 | struct fc_lport *lport; |
85b4aa49 RL |
2096 | struct net_device *netdev; |
2097 | ||
dfc1d0fe | 2098 | mutex_lock(&fcoe_config_mutex); |
34ce27bc VD |
2099 | |
2100 | if (!rtnl_trylock()) { | |
2101 | mutex_unlock(&fcoe_config_mutex); | |
2102 | return restart_syscall(); | |
2103 | } | |
2104 | ||
dfc1d0fe CL |
2105 | #ifdef CONFIG_FCOE_MODULE |
2106 | /* | |
2107 | * Make sure the module has been initialized, and is not about to be | |
2108 | * removed. Module paramter sysfs files are writable before the | |
2109 | * module_init function is called and after module_exit. | |
2110 | */ | |
2111 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
2112 | rc = -ENODEV; | |
721cafaf | 2113 | goto out_nomod; |
dfc1d0fe CL |
2114 | } |
2115 | #endif | |
2116 | ||
6409ea65 RL |
2117 | if (!try_module_get(THIS_MODULE)) { |
2118 | rc = -EINVAL; | |
2119 | goto out_nomod; | |
2120 | } | |
2121 | ||
85b4aa49 RL |
2122 | netdev = fcoe_if_to_netdev(buffer); |
2123 | if (!netdev) { | |
2124 | rc = -ENODEV; | |
2125 | goto out_nodev; | |
2126 | } | |
2e70e241 | 2127 | |
85b4aa49 RL |
2128 | /* look for existing lport */ |
2129 | if (fcoe_hostlist_lookup(netdev)) { | |
2130 | rc = -EEXIST; | |
2131 | goto out_putdev; | |
2132 | } | |
85b4aa49 | 2133 | |
030f4e00 CL |
2134 | fcoe = fcoe_interface_create(netdev); |
2135 | if (!fcoe) { | |
2136 | rc = -ENOMEM; | |
2137 | goto out_putdev; | |
2138 | } | |
2139 | ||
9a05753b | 2140 | lport = fcoe_if_create(fcoe, &netdev->dev, 0); |
af7f85d9 | 2141 | if (IS_ERR(lport)) { |
d5488eb9 | 2142 | printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", |
85b4aa49 | 2143 | netdev->name); |
85b4aa49 | 2144 | rc = -EIO; |
2e70e241 | 2145 | fcoe_interface_cleanup(fcoe); |
030f4e00 | 2146 | goto out_free; |
85b4aa49 | 2147 | } |
030f4e00 | 2148 | |
54b649f8 CL |
2149 | /* Make this the "master" N_Port */ |
2150 | fcoe->ctlr.lp = lport; | |
2151 | ||
c863df33 CL |
2152 | /* add to lports list */ |
2153 | fcoe_hostlist_add(lport); | |
2154 | ||
54b649f8 CL |
2155 | /* start FIP Discovery and FLOGI */ |
2156 | lport->boot_time = jiffies; | |
2157 | fc_fabric_login(lport); | |
2158 | if (!fcoe_link_ok(lport)) | |
2159 | fcoe_ctlr_link_up(&fcoe->ctlr); | |
030f4e00 | 2160 | |
54b649f8 CL |
2161 | /* |
2162 | * Release from init in fcoe_interface_create(), on success lport | |
2163 | * should be holding a reference taken in fcoe_if_create(). | |
2164 | */ | |
030f4e00 | 2165 | fcoe_interface_put(fcoe); |
6409ea65 RL |
2166 | dev_put(netdev); |
2167 | rtnl_unlock(); | |
2168 | mutex_unlock(&fcoe_config_mutex); | |
2169 | ||
2170 | return 0; | |
2171 | out_free: | |
2172 | fcoe_interface_put(fcoe); | |
85b4aa49 RL |
2173 | out_putdev: |
2174 | dev_put(netdev); | |
2175 | out_nodev: | |
6409ea65 RL |
2176 | module_put(THIS_MODULE); |
2177 | out_nomod: | |
34ce27bc | 2178 | rtnl_unlock(); |
dfc1d0fe | 2179 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 RL |
2180 | return rc; |
2181 | } | |
2182 | ||
34f42a07 | 2183 | /** |
5e4f8fe7 RL |
2184 | * fcoe_link_speed_update() - Update the supported and actual link speeds |
2185 | * @lport: The local port to update speeds for | |
85b4aa49 | 2186 | * |
5e4f8fe7 RL |
2187 | * Returns: 0 if the ethtool query was successful |
2188 | * -1 if the ethtool query failed | |
85b4aa49 | 2189 | */ |
5e4f8fe7 | 2190 | int fcoe_link_speed_update(struct fc_lport *lport) |
85b4aa49 | 2191 | { |
1875f27e RL |
2192 | struct fcoe_port *port = lport_priv(lport); |
2193 | struct net_device *netdev = port->fcoe->netdev; | |
85b4aa49 | 2194 | struct ethtool_cmd ecmd = { ETHTOOL_GSET }; |
85b4aa49 | 2195 | |
5e4f8fe7 | 2196 | if (!dev_ethtool_get_settings(netdev, &ecmd)) { |
1875f27e | 2197 | lport->link_supported_speeds &= |
2f718d64 YZ |
2198 | ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT); |
2199 | if (ecmd.supported & (SUPPORTED_1000baseT_Half | | |
2200 | SUPPORTED_1000baseT_Full)) | |
1875f27e | 2201 | lport->link_supported_speeds |= FC_PORTSPEED_1GBIT; |
2f718d64 | 2202 | if (ecmd.supported & SUPPORTED_10000baseT_Full) |
1875f27e | 2203 | lport->link_supported_speeds |= |
2f718d64 YZ |
2204 | FC_PORTSPEED_10GBIT; |
2205 | if (ecmd.speed == SPEED_1000) | |
1875f27e | 2206 | lport->link_speed = FC_PORTSPEED_1GBIT; |
2f718d64 | 2207 | if (ecmd.speed == SPEED_10000) |
1875f27e | 2208 | lport->link_speed = FC_PORTSPEED_10GBIT; |
85b4aa49 | 2209 | |
2f718d64 YZ |
2210 | return 0; |
2211 | } | |
2212 | return -1; | |
85b4aa49 | 2213 | } |
85b4aa49 | 2214 | |
5e4f8fe7 RL |
2215 | /** |
2216 | * fcoe_link_ok() - Check if the link is OK for a local port | |
2217 | * @lport: The local port to check link on | |
2218 | * | |
2219 | * Returns: 0 if link is UP and OK, -1 if not | |
2220 | * | |
2221 | */ | |
2222 | int fcoe_link_ok(struct fc_lport *lport) | |
2223 | { | |
2224 | struct fcoe_port *port = lport_priv(lport); | |
2225 | struct net_device *netdev = port->fcoe->netdev; | |
2226 | ||
2227 | if (netif_oper_up(netdev)) | |
2228 | return 0; | |
2229 | return -1; | |
2230 | } | |
2231 | ||
34f42a07 | 2232 | /** |
1875f27e RL |
2233 | * fcoe_percpu_clean() - Clear all pending skbs for an local port |
2234 | * @lport: The local port whose skbs are to be cleared | |
e7a51997 JE |
2235 | * |
2236 | * Must be called with fcoe_create_mutex held to single-thread completion. | |
2237 | * | |
2238 | * This flushes the pending skbs by adding a new skb to each queue and | |
2239 | * waiting until they are all freed. This assures us that not only are | |
2240 | * there no packets that will be handled by the lport, but also that any | |
2241 | * threads already handling packet have returned. | |
85b4aa49 | 2242 | */ |
1875f27e | 2243 | void fcoe_percpu_clean(struct fc_lport *lport) |
85b4aa49 | 2244 | { |
85b4aa49 RL |
2245 | struct fcoe_percpu_s *pp; |
2246 | struct fcoe_rcv_info *fr; | |
2247 | struct sk_buff_head *list; | |
2248 | struct sk_buff *skb, *next; | |
2249 | struct sk_buff *head; | |
5e5e92df | 2250 | unsigned int cpu; |
85b4aa49 | 2251 | |
5e5e92df RL |
2252 | for_each_possible_cpu(cpu) { |
2253 | pp = &per_cpu(fcoe_percpu, cpu); | |
2254 | spin_lock_bh(&pp->fcoe_rx_list.lock); | |
2255 | list = &pp->fcoe_rx_list; | |
2256 | head = list->next; | |
2257 | for (skb = head; skb != (struct sk_buff *)list; | |
2258 | skb = next) { | |
2259 | next = skb->next; | |
2260 | fr = fcoe_dev_from_skb(skb); | |
1875f27e | 2261 | if (fr->fr_dev == lport) { |
5e5e92df RL |
2262 | __skb_unlink(skb, list); |
2263 | kfree_skb(skb); | |
85b4aa49 | 2264 | } |
85b4aa49 | 2265 | } |
e7a51997 JE |
2266 | |
2267 | if (!pp->thread || !cpu_online(cpu)) { | |
2268 | spin_unlock_bh(&pp->fcoe_rx_list.lock); | |
2269 | continue; | |
2270 | } | |
2271 | ||
2272 | skb = dev_alloc_skb(0); | |
2273 | if (!skb) { | |
2274 | spin_unlock_bh(&pp->fcoe_rx_list.lock); | |
2275 | continue; | |
2276 | } | |
2277 | skb->destructor = fcoe_percpu_flush_done; | |
2278 | ||
2279 | __skb_queue_tail(&pp->fcoe_rx_list, skb); | |
2280 | if (pp->fcoe_rx_list.qlen == 1) | |
2281 | wake_up_process(pp->thread); | |
5e5e92df | 2282 | spin_unlock_bh(&pp->fcoe_rx_list.lock); |
e7a51997 JE |
2283 | |
2284 | wait_for_completion(&fcoe_flush_completion); | |
85b4aa49 RL |
2285 | } |
2286 | } | |
85b4aa49 RL |
2287 | |
2288 | /** | |
34f42a07 | 2289 | * fcoe_clean_pending_queue() - Dequeue a skb and free it |
1875f27e | 2290 | * @lport: The local port to dequeue a skb on |
34f42a07 | 2291 | */ |
1875f27e | 2292 | void fcoe_clean_pending_queue(struct fc_lport *lport) |
85b4aa49 | 2293 | { |
1875f27e | 2294 | struct fcoe_port *port = lport_priv(lport); |
85b4aa49 RL |
2295 | struct sk_buff *skb; |
2296 | ||
014f5c3f CL |
2297 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
2298 | while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) { | |
2299 | spin_unlock_bh(&port->fcoe_pending_queue.lock); | |
85b4aa49 | 2300 | kfree_skb(skb); |
014f5c3f | 2301 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
85b4aa49 | 2302 | } |
014f5c3f | 2303 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
85b4aa49 | 2304 | } |
85b4aa49 | 2305 | |
34f42a07 | 2306 | /** |
1875f27e RL |
2307 | * fcoe_reset() - Reset a local port |
2308 | * @shost: The SCSI host associated with the local port to be reset | |
85b4aa49 | 2309 | * |
1875f27e | 2310 | * Returns: Always 0 (return value required by FC transport template) |
85b4aa49 RL |
2311 | */ |
2312 | int fcoe_reset(struct Scsi_Host *shost) | |
2313 | { | |
2314 | struct fc_lport *lport = shost_priv(shost); | |
2315 | fc_lport_reset(lport); | |
2316 | return 0; | |
2317 | } | |
85b4aa49 | 2318 | |
34f42a07 | 2319 | /** |
1875f27e RL |
2320 | * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device |
2321 | * @netdev: The net device used as a key | |
85b4aa49 | 2322 | * |
1875f27e RL |
2323 | * Locking: Must be called with the RNL mutex held. |
2324 | * | |
2325 | * Returns: NULL or the FCoE interface | |
85b4aa49 | 2326 | */ |
014f5c3f | 2327 | static struct fcoe_interface * |
1875f27e | 2328 | fcoe_hostlist_lookup_port(const struct net_device *netdev) |
85b4aa49 | 2329 | { |
014f5c3f | 2330 | struct fcoe_interface *fcoe; |
85b4aa49 | 2331 | |
014f5c3f | 2332 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
1875f27e | 2333 | if (fcoe->netdev == netdev) |
014f5c3f | 2334 | return fcoe; |
85b4aa49 | 2335 | } |
85b4aa49 RL |
2336 | return NULL; |
2337 | } | |
2338 | ||
34f42a07 | 2339 | /** |
1875f27e RL |
2340 | * fcoe_hostlist_lookup() - Find the local port associated with a |
2341 | * given net device | |
2342 | * @netdev: The netdevice used as a key | |
85b4aa49 | 2343 | * |
1875f27e RL |
2344 | * Locking: Must be called with the RTNL mutex held |
2345 | * | |
2346 | * Returns: NULL or the local port | |
85b4aa49 | 2347 | */ |
090eb6c4 | 2348 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) |
85b4aa49 | 2349 | { |
014f5c3f | 2350 | struct fcoe_interface *fcoe; |
85b4aa49 | 2351 | |
014f5c3f | 2352 | fcoe = fcoe_hostlist_lookup_port(netdev); |
3fe9a0ba | 2353 | return (fcoe) ? fcoe->ctlr.lp : NULL; |
85b4aa49 | 2354 | } |
85b4aa49 | 2355 | |
34f42a07 | 2356 | /** |
1875f27e RL |
2357 | * fcoe_hostlist_add() - Add the FCoE interface identified by a local |
2358 | * port to the hostlist | |
2359 | * @lport: The local port that identifies the FCoE interface to be added | |
85b4aa49 | 2360 | * |
090eb6c4 | 2361 | * Locking: must be called with the RTNL mutex held |
1875f27e RL |
2362 | * |
2363 | * Returns: 0 for success | |
85b4aa49 | 2364 | */ |
090eb6c4 | 2365 | static int fcoe_hostlist_add(const struct fc_lport *lport) |
85b4aa49 | 2366 | { |
014f5c3f CL |
2367 | struct fcoe_interface *fcoe; |
2368 | struct fcoe_port *port; | |
2369 | ||
2370 | fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); | |
2371 | if (!fcoe) { | |
2372 | port = lport_priv(lport); | |
2373 | fcoe = port->fcoe; | |
2374 | list_add_tail(&fcoe->list, &fcoe_hostlist); | |
85b4aa49 RL |
2375 | } |
2376 | return 0; | |
2377 | } | |
85b4aa49 | 2378 | |
85b4aa49 | 2379 | /** |
1875f27e | 2380 | * fcoe_init() - Initialize fcoe.ko |
85b4aa49 | 2381 | * |
1875f27e | 2382 | * Returns: 0 on success, or a negative value on failure |
34f42a07 | 2383 | */ |
85b4aa49 RL |
2384 | static int __init fcoe_init(void) |
2385 | { | |
1875f27e | 2386 | struct fcoe_percpu_s *p; |
38eccabd | 2387 | unsigned int cpu; |
8976f424 | 2388 | int rc = 0; |
85b4aa49 | 2389 | |
dfc1d0fe CL |
2390 | mutex_lock(&fcoe_config_mutex); |
2391 | ||
38eccabd | 2392 | for_each_possible_cpu(cpu) { |
5e5e92df | 2393 | p = &per_cpu(fcoe_percpu, cpu); |
38eccabd RL |
2394 | skb_queue_head_init(&p->fcoe_rx_list); |
2395 | } | |
2396 | ||
8976f424 RL |
2397 | for_each_online_cpu(cpu) |
2398 | fcoe_percpu_thread_create(cpu); | |
85b4aa49 | 2399 | |
8976f424 RL |
2400 | /* Initialize per CPU interrupt thread */ |
2401 | rc = register_hotcpu_notifier(&fcoe_cpu_notifier); | |
2402 | if (rc) | |
2403 | goto out_free; | |
85b4aa49 | 2404 | |
8976f424 | 2405 | /* Setup link change notification */ |
85b4aa49 RL |
2406 | fcoe_dev_setup(); |
2407 | ||
5892c32f CL |
2408 | rc = fcoe_if_init(); |
2409 | if (rc) | |
2410 | goto out_free; | |
85b4aa49 | 2411 | |
dfc1d0fe | 2412 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 | 2413 | return 0; |
8976f424 RL |
2414 | |
2415 | out_free: | |
2416 | for_each_online_cpu(cpu) { | |
2417 | fcoe_percpu_thread_destroy(cpu); | |
2418 | } | |
dfc1d0fe | 2419 | mutex_unlock(&fcoe_config_mutex); |
8976f424 | 2420 | return rc; |
85b4aa49 RL |
2421 | } |
2422 | module_init(fcoe_init); | |
2423 | ||
2424 | /** | |
1875f27e | 2425 | * fcoe_exit() - Clean up fcoe.ko |
85b4aa49 | 2426 | * |
1875f27e | 2427 | * Returns: 0 on success or a negative value on failure |
34f42a07 | 2428 | */ |
85b4aa49 RL |
2429 | static void __exit fcoe_exit(void) |
2430 | { | |
014f5c3f | 2431 | struct fcoe_interface *fcoe, *tmp; |
2e70e241 | 2432 | struct fcoe_port *port; |
1875f27e | 2433 | unsigned int cpu; |
85b4aa49 | 2434 | |
dfc1d0fe CL |
2435 | mutex_lock(&fcoe_config_mutex); |
2436 | ||
85b4aa49 RL |
2437 | fcoe_dev_cleanup(); |
2438 | ||
5919a595 | 2439 | /* releases the associated fcoe hosts */ |
090eb6c4 CL |
2440 | rtnl_lock(); |
2441 | list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { | |
c863df33 | 2442 | list_del(&fcoe->list); |
2e70e241 | 2443 | port = lport_priv(fcoe->ctlr.lp); |
2e70e241 | 2444 | fcoe_interface_cleanup(fcoe); |
2e70e241 | 2445 | schedule_work(&port->destroy_work); |
c863df33 | 2446 | } |
090eb6c4 | 2447 | rtnl_unlock(); |
85b4aa49 | 2448 | |
8976f424 RL |
2449 | unregister_hotcpu_notifier(&fcoe_cpu_notifier); |
2450 | ||
014f5c3f | 2451 | for_each_online_cpu(cpu) |
8976f424 | 2452 | fcoe_percpu_thread_destroy(cpu); |
85b4aa49 | 2453 | |
dfc1d0fe | 2454 | mutex_unlock(&fcoe_config_mutex); |
2e70e241 CL |
2455 | |
2456 | /* flush any asyncronous interface destroys, | |
2457 | * this should happen after the netdev notifier is unregistered */ | |
2458 | flush_scheduled_work(); | |
9a05753b CL |
2459 | /* That will flush out all the N_Ports on the hostlist, but now we |
2460 | * may have NPIV VN_Ports scheduled for destruction */ | |
2461 | flush_scheduled_work(); | |
2e70e241 CL |
2462 | |
2463 | /* detach from scsi transport | |
2464 | * must happen after all destroys are done, therefor after the flush */ | |
2465 | fcoe_if_exit(); | |
85b4aa49 RL |
2466 | } |
2467 | module_exit(fcoe_exit); | |
11b56188 CL |
2468 | |
2469 | /** | |
2470 | * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler | |
2471 | * @seq: active sequence in the FLOGI or FDISC exchange | |
2472 | * @fp: response frame, or error encoded in a pointer (timeout) | |
2473 | * @arg: pointer the the fcoe_ctlr structure | |
2474 | * | |
2475 | * This handles MAC address managment for FCoE, then passes control on to | |
2476 | * the libfc FLOGI response handler. | |
2477 | */ | |
2478 | static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) | |
2479 | { | |
2480 | struct fcoe_ctlr *fip = arg; | |
2481 | struct fc_exch *exch = fc_seq_exch(seq); | |
2482 | struct fc_lport *lport = exch->lp; | |
2483 | u8 *mac; | |
2484 | ||
2485 | if (IS_ERR(fp)) | |
2486 | goto done; | |
2487 | ||
2488 | mac = fr_cb(fp)->granted_mac; | |
2489 | if (is_zero_ether_addr(mac)) { | |
2490 | /* pre-FIP */ | |
386309ce | 2491 | if (fcoe_ctlr_recv_flogi(fip, lport, fp)) { |
11b56188 CL |
2492 | fc_frame_free(fp); |
2493 | return; | |
2494 | } | |
11b56188 | 2495 | } |
386309ce | 2496 | fcoe_update_src_mac(lport, mac); |
11b56188 CL |
2497 | done: |
2498 | fc_lport_flogi_resp(seq, fp, lport); | |
2499 | } | |
2500 | ||
2501 | /** | |
2502 | * fcoe_logo_resp() - FCoE specific LOGO response handler | |
2503 | * @seq: active sequence in the LOGO exchange | |
2504 | * @fp: response frame, or error encoded in a pointer (timeout) | |
2505 | * @arg: pointer the the fcoe_ctlr structure | |
2506 | * | |
2507 | * This handles MAC address managment for FCoE, then passes control on to | |
2508 | * the libfc LOGO response handler. | |
2509 | */ | |
2510 | static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) | |
2511 | { | |
386309ce | 2512 | struct fc_lport *lport = arg; |
11b56188 CL |
2513 | static u8 zero_mac[ETH_ALEN] = { 0 }; |
2514 | ||
2515 | if (!IS_ERR(fp)) | |
386309ce | 2516 | fcoe_update_src_mac(lport, zero_mac); |
11b56188 CL |
2517 | fc_lport_logo_resp(seq, fp, lport); |
2518 | } | |
2519 | ||
2520 | /** | |
2521 | * fcoe_elsct_send - FCoE specific ELS handler | |
2522 | * | |
2523 | * This does special case handling of FIP encapsualted ELS exchanges for FCoE, | |
2524 | * using FCoE specific response handlers and passing the FIP controller as | |
2525 | * the argument (the lport is still available from the exchange). | |
2526 | * | |
2527 | * Most of the work here is just handed off to the libfc routine. | |
2528 | */ | |
1875f27e RL |
2529 | static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, |
2530 | struct fc_frame *fp, unsigned int op, | |
2531 | void (*resp)(struct fc_seq *, | |
2532 | struct fc_frame *, | |
2533 | void *), | |
2534 | void *arg, u32 timeout) | |
11b56188 CL |
2535 | { |
2536 | struct fcoe_port *port = lport_priv(lport); | |
2537 | struct fcoe_interface *fcoe = port->fcoe; | |
2538 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
2539 | struct fc_frame_header *fh = fc_frame_header_get(fp); | |
2540 | ||
2541 | switch (op) { | |
2542 | case ELS_FLOGI: | |
2543 | case ELS_FDISC: | |
e10f8c66 JE |
2544 | if (lport->point_to_multipoint) |
2545 | break; | |
11b56188 CL |
2546 | return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, |
2547 | fip, timeout); | |
2548 | case ELS_LOGO: | |
2549 | /* only hook onto fabric logouts, not port logouts */ | |
2550 | if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) | |
2551 | break; | |
2552 | return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, | |
386309ce | 2553 | lport, timeout); |
11b56188 CL |
2554 | } |
2555 | return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); | |
2556 | } | |
2557 | ||
9a05753b CL |
2558 | /** |
2559 | * fcoe_vport_create() - create an fc_host/scsi_host for a vport | |
2560 | * @vport: fc_vport object to create a new fc_host for | |
2561 | * @disabled: start the new fc_host in a disabled state by default? | |
2562 | * | |
2563 | * Returns: 0 for success | |
2564 | */ | |
2565 | static int fcoe_vport_create(struct fc_vport *vport, bool disabled) | |
2566 | { | |
2567 | struct Scsi_Host *shost = vport_to_shost(vport); | |
2568 | struct fc_lport *n_port = shost_priv(shost); | |
2569 | struct fcoe_port *port = lport_priv(n_port); | |
2570 | struct fcoe_interface *fcoe = port->fcoe; | |
2571 | struct net_device *netdev = fcoe->netdev; | |
2572 | struct fc_lport *vn_port; | |
2573 | ||
2574 | mutex_lock(&fcoe_config_mutex); | |
2575 | vn_port = fcoe_if_create(fcoe, &vport->dev, 1); | |
2576 | mutex_unlock(&fcoe_config_mutex); | |
2577 | ||
2578 | if (IS_ERR(vn_port)) { | |
2579 | printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", | |
2580 | netdev->name); | |
2581 | return -EIO; | |
2582 | } | |
2583 | ||
2584 | if (disabled) { | |
2585 | fc_vport_set_state(vport, FC_VPORT_DISABLED); | |
2586 | } else { | |
2587 | vn_port->boot_time = jiffies; | |
2588 | fc_fabric_login(vn_port); | |
2589 | fc_vport_setlink(vn_port); | |
2590 | } | |
2591 | return 0; | |
2592 | } | |
2593 | ||
2594 | /** | |
2595 | * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport | |
2596 | * @vport: fc_vport object that is being destroyed | |
2597 | * | |
2598 | * Returns: 0 for success | |
2599 | */ | |
2600 | static int fcoe_vport_destroy(struct fc_vport *vport) | |
2601 | { | |
2602 | struct Scsi_Host *shost = vport_to_shost(vport); | |
2603 | struct fc_lport *n_port = shost_priv(shost); | |
2604 | struct fc_lport *vn_port = vport->dd_data; | |
2605 | struct fcoe_port *port = lport_priv(vn_port); | |
2606 | ||
2607 | mutex_lock(&n_port->lp_mutex); | |
2608 | list_del(&vn_port->list); | |
2609 | mutex_unlock(&n_port->lp_mutex); | |
2610 | schedule_work(&port->destroy_work); | |
2611 | return 0; | |
2612 | } | |
2613 | ||
2614 | /** | |
2615 | * fcoe_vport_disable() - change vport state | |
2616 | * @vport: vport to bring online/offline | |
2617 | * @disable: should the vport be disabled? | |
2618 | */ | |
2619 | static int fcoe_vport_disable(struct fc_vport *vport, bool disable) | |
2620 | { | |
2621 | struct fc_lport *lport = vport->dd_data; | |
2622 | ||
2623 | if (disable) { | |
2624 | fc_vport_set_state(vport, FC_VPORT_DISABLED); | |
2625 | fc_fabric_logoff(lport); | |
2626 | } else { | |
2627 | lport->boot_time = jiffies; | |
2628 | fc_fabric_login(lport); | |
2629 | fc_vport_setlink(lport); | |
2630 | } | |
2631 | ||
2632 | return 0; | |
2633 | } | |
2634 | ||
dc8596d3 CL |
2635 | /** |
2636 | * fcoe_vport_set_symbolic_name() - append vport string to symbolic name | |
2637 | * @vport: fc_vport with a new symbolic name string | |
2638 | * | |
2639 | * After generating a new symbolic name string, a new RSPN_ID request is | |
2640 | * sent to the name server. There is no response handler, so if it fails | |
2641 | * for some reason it will not be retried. | |
2642 | */ | |
2643 | static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) | |
2644 | { | |
2645 | struct fc_lport *lport = vport->dd_data; | |
2646 | struct fc_frame *fp; | |
2647 | size_t len; | |
2648 | ||
2649 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, | |
2650 | "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, | |
2651 | fcoe_netdev(lport)->name, vport->symbolic_name); | |
2652 | ||
2653 | if (lport->state != LPORT_ST_READY) | |
2654 | return; | |
2655 | ||
2656 | len = strnlen(fc_host_symbolic_name(lport->host), 255); | |
2657 | fp = fc_frame_alloc(lport, | |
2658 | sizeof(struct fc_ct_hdr) + | |
2659 | sizeof(struct fc_ns_rspn) + len); | |
2660 | if (!fp) | |
2661 | return; | |
2662 | lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, | |
b94f8951 | 2663 | NULL, NULL, 3 * lport->r_a_tov); |
dc8596d3 | 2664 | } |
b84056bf YZ |
2665 | |
2666 | /** | |
2667 | * fcoe_get_lesb() - Fill the FCoE Link Error Status Block | |
2668 | * @lport: the local port | |
2669 | * @fc_lesb: the link error status block | |
2670 | */ | |
2671 | static void fcoe_get_lesb(struct fc_lport *lport, | |
2672 | struct fc_els_lesb *fc_lesb) | |
2673 | { | |
2674 | unsigned int cpu; | |
2675 | u32 lfc, vlfc, mdac; | |
2676 | struct fcoe_dev_stats *devst; | |
2677 | struct fcoe_fc_els_lesb *lesb; | |
2678 | struct net_device *netdev = fcoe_netdev(lport); | |
2679 | ||
2680 | lfc = 0; | |
2681 | vlfc = 0; | |
2682 | mdac = 0; | |
2683 | lesb = (struct fcoe_fc_els_lesb *)fc_lesb; | |
2684 | memset(lesb, 0, sizeof(*lesb)); | |
2685 | for_each_possible_cpu(cpu) { | |
2686 | devst = per_cpu_ptr(lport->dev_stats, cpu); | |
2687 | lfc += devst->LinkFailureCount; | |
2688 | vlfc += devst->VLinkFailureCount; | |
2689 | mdac += devst->MissDiscAdvCount; | |
2690 | } | |
2691 | lesb->lesb_link_fail = htonl(lfc); | |
2692 | lesb->lesb_vlink_fail = htonl(vlfc); | |
2693 | lesb->lesb_miss_fka = htonl(mdac); | |
2694 | lesb->lesb_fcs_error = htonl(dev_get_stats(netdev)->rx_crc_errors); | |
2695 | } | |
7d65b0df JE |
2696 | |
2697 | /** | |
2698 | * fcoe_set_port_id() - Callback from libfc when Port_ID is set. | |
2699 | * @lport: the local port | |
2700 | * @port_id: the port ID | |
2701 | * @fp: the received frame, if any, that caused the port_id to be set. | |
2702 | * | |
2703 | * This routine handles the case where we received a FLOGI and are | |
2704 | * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi() | |
2705 | * so it can set the non-mapped mode and gateway address. | |
2706 | * | |
2707 | * The FLOGI LS_ACC is handled by fcoe_flogi_resp(). | |
2708 | */ | |
2709 | static void fcoe_set_port_id(struct fc_lport *lport, | |
2710 | u32 port_id, struct fc_frame *fp) | |
2711 | { | |
2712 | struct fcoe_port *port = lport_priv(lport); | |
2713 | struct fcoe_interface *fcoe = port->fcoe; | |
2714 | ||
2715 | if (fp && fc_frame_payload_op(fp) == ELS_FLOGI) | |
2716 | fcoe_ctlr_recv_flogi(&fcoe->ctlr, lport, fp); | |
2717 | } |