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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 | ||
3067817a | 120 | module_param_call(create, fcoe_create, NULL, (void *)FIP_MODE_FABRIC, S_IWUSR); |
1875f27e | 121 | __MODULE_PARM_TYPE(create, "string"); |
55a66d3c | 122 | MODULE_PARM_DESC(create, " Creates fcoe instance on a ethernet interface"); |
1dd454d9 JE |
123 | module_param_call(create_vn2vn, fcoe_create, NULL, |
124 | (void *)FIP_MODE_VN2VN, S_IWUSR); | |
125 | __MODULE_PARM_TYPE(create_vn2vn, "string"); | |
126 | MODULE_PARM_DESC(create_vn2vn, " Creates a VN_node to VN_node FCoE instance " | |
127 | "on an Ethernet interface"); | |
1875f27e RL |
128 | module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR); |
129 | __MODULE_PARM_TYPE(destroy, "string"); | |
55a66d3c VD |
130 | MODULE_PARM_DESC(destroy, " Destroys fcoe instance on a ethernet interface"); |
131 | module_param_call(enable, fcoe_enable, NULL, NULL, S_IWUSR); | |
132 | __MODULE_PARM_TYPE(enable, "string"); | |
133 | MODULE_PARM_DESC(enable, " Enables fcoe on a ethernet interface."); | |
134 | module_param_call(disable, fcoe_disable, NULL, NULL, S_IWUSR); | |
135 | __MODULE_PARM_TYPE(disable, "string"); | |
136 | MODULE_PARM_DESC(disable, " Disables fcoe on a ethernet interface."); | |
1875f27e RL |
137 | |
138 | /* notification function for packets from net device */ | |
85b4aa49 RL |
139 | static struct notifier_block fcoe_notifier = { |
140 | .notifier_call = fcoe_device_notification, | |
141 | }; | |
142 | ||
1875f27e RL |
143 | /* notification function for CPU hotplug events */ |
144 | static struct notifier_block fcoe_cpu_notifier = { | |
145 | .notifier_call = fcoe_cpu_callback, | |
146 | }; | |
147 | ||
e9084bb8 CL |
148 | static struct scsi_transport_template *fcoe_transport_template; |
149 | static struct scsi_transport_template *fcoe_vport_transport_template; | |
7f349142 | 150 | |
1875f27e RL |
151 | static int fcoe_vport_destroy(struct fc_vport *); |
152 | static int fcoe_vport_create(struct fc_vport *, bool disabled); | |
153 | static int fcoe_vport_disable(struct fc_vport *, bool disable); | |
154 | static void fcoe_set_vport_symbolic_name(struct fc_vport *); | |
7d65b0df | 155 | static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *); |
1875f27e RL |
156 | |
157 | static struct libfc_function_template fcoe_libfc_fcn_templ = { | |
158 | .frame_send = fcoe_xmit, | |
159 | .ddp_setup = fcoe_ddp_setup, | |
160 | .ddp_done = fcoe_ddp_done, | |
161 | .elsct_send = fcoe_elsct_send, | |
b84056bf | 162 | .get_lesb = fcoe_get_lesb, |
7d65b0df | 163 | .lport_set_port_id = fcoe_set_port_id, |
1875f27e | 164 | }; |
9a05753b | 165 | |
7f349142 VD |
166 | struct fc_function_template fcoe_transport_function = { |
167 | .show_host_node_name = 1, | |
168 | .show_host_port_name = 1, | |
169 | .show_host_supported_classes = 1, | |
170 | .show_host_supported_fc4s = 1, | |
171 | .show_host_active_fc4s = 1, | |
172 | .show_host_maxframe_size = 1, | |
173 | ||
174 | .show_host_port_id = 1, | |
175 | .show_host_supported_speeds = 1, | |
176 | .get_host_speed = fc_get_host_speed, | |
177 | .show_host_speed = 1, | |
178 | .show_host_port_type = 1, | |
179 | .get_host_port_state = fc_get_host_port_state, | |
180 | .show_host_port_state = 1, | |
181 | .show_host_symbolic_name = 1, | |
182 | ||
183 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
184 | .show_rport_maxframe_size = 1, | |
185 | .show_rport_supported_classes = 1, | |
186 | ||
187 | .show_host_fabric_name = 1, | |
188 | .show_starget_node_name = 1, | |
189 | .show_starget_port_name = 1, | |
190 | .show_starget_port_id = 1, | |
191 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
192 | .show_rport_dev_loss_tmo = 1, | |
193 | .get_fc_host_stats = fc_get_host_stats, | |
194 | .issue_fc_host_lip = fcoe_reset, | |
195 | ||
196 | .terminate_rport_io = fc_rport_terminate_io, | |
9a05753b CL |
197 | |
198 | .vport_create = fcoe_vport_create, | |
199 | .vport_delete = fcoe_vport_destroy, | |
200 | .vport_disable = fcoe_vport_disable, | |
dc8596d3 | 201 | .set_vport_symbolic_name = fcoe_set_vport_symbolic_name, |
a51ab396 SM |
202 | |
203 | .bsg_request = fc_lport_bsg_request, | |
7f349142 VD |
204 | }; |
205 | ||
e9084bb8 CL |
206 | struct fc_function_template fcoe_vport_transport_function = { |
207 | .show_host_node_name = 1, | |
208 | .show_host_port_name = 1, | |
209 | .show_host_supported_classes = 1, | |
210 | .show_host_supported_fc4s = 1, | |
211 | .show_host_active_fc4s = 1, | |
212 | .show_host_maxframe_size = 1, | |
213 | ||
214 | .show_host_port_id = 1, | |
215 | .show_host_supported_speeds = 1, | |
216 | .get_host_speed = fc_get_host_speed, | |
217 | .show_host_speed = 1, | |
218 | .show_host_port_type = 1, | |
219 | .get_host_port_state = fc_get_host_port_state, | |
220 | .show_host_port_state = 1, | |
221 | .show_host_symbolic_name = 1, | |
222 | ||
223 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
224 | .show_rport_maxframe_size = 1, | |
225 | .show_rport_supported_classes = 1, | |
226 | ||
227 | .show_host_fabric_name = 1, | |
228 | .show_starget_node_name = 1, | |
229 | .show_starget_port_name = 1, | |
230 | .show_starget_port_id = 1, | |
231 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
232 | .show_rport_dev_loss_tmo = 1, | |
233 | .get_fc_host_stats = fc_get_host_stats, | |
234 | .issue_fc_host_lip = fcoe_reset, | |
235 | ||
236 | .terminate_rport_io = fc_rport_terminate_io, | |
a51ab396 SM |
237 | |
238 | .bsg_request = fc_lport_bsg_request, | |
e9084bb8 CL |
239 | }; |
240 | ||
7f349142 VD |
241 | static struct scsi_host_template fcoe_shost_template = { |
242 | .module = THIS_MODULE, | |
243 | .name = "FCoE Driver", | |
244 | .proc_name = FCOE_NAME, | |
245 | .queuecommand = fc_queuecommand, | |
246 | .eh_abort_handler = fc_eh_abort, | |
247 | .eh_device_reset_handler = fc_eh_device_reset, | |
248 | .eh_host_reset_handler = fc_eh_host_reset, | |
249 | .slave_alloc = fc_slave_alloc, | |
250 | .change_queue_depth = fc_change_queue_depth, | |
251 | .change_queue_type = fc_change_queue_type, | |
252 | .this_id = -1, | |
14caf44c | 253 | .cmd_per_lun = 3, |
7f349142 VD |
254 | .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, |
255 | .use_clustering = ENABLE_CLUSTERING, | |
256 | .sg_tablesize = SG_ALL, | |
257 | .max_sectors = 0xffff, | |
258 | }; | |
259 | ||
54b649f8 | 260 | /** |
1875f27e RL |
261 | * fcoe_interface_setup() - Setup a FCoE interface |
262 | * @fcoe: The new FCoE interface | |
263 | * @netdev: The net device that the fcoe interface is on | |
54b649f8 CL |
264 | * |
265 | * Returns : 0 for success | |
2e70e241 | 266 | * Locking: must be called with the RTNL mutex held |
54b649f8 CL |
267 | */ |
268 | static int fcoe_interface_setup(struct fcoe_interface *fcoe, | |
269 | struct net_device *netdev) | |
270 | { | |
271 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
272 | struct netdev_hw_addr *ha; | |
5bab87e6 | 273 | struct net_device *real_dev; |
54b649f8 | 274 | u8 flogi_maddr[ETH_ALEN]; |
b7a727f1 | 275 | const struct net_device_ops *ops; |
54b649f8 CL |
276 | |
277 | fcoe->netdev = netdev; | |
278 | ||
b7a727f1 YZ |
279 | /* Let LLD initialize for FCoE */ |
280 | ops = netdev->netdev_ops; | |
281 | if (ops->ndo_fcoe_enable) { | |
282 | if (ops->ndo_fcoe_enable(netdev)) | |
283 | FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE" | |
284 | " specific feature for LLD.\n"); | |
285 | } | |
286 | ||
54b649f8 CL |
287 | /* Do not support for bonding device */ |
288 | if ((netdev->priv_flags & IFF_MASTER_ALB) || | |
289 | (netdev->priv_flags & IFF_SLAVE_INACTIVE) || | |
290 | (netdev->priv_flags & IFF_MASTER_8023AD)) { | |
59d92516 | 291 | FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n"); |
54b649f8 CL |
292 | return -EOPNOTSUPP; |
293 | } | |
294 | ||
295 | /* look for SAN MAC address, if multiple SAN MACs exist, only | |
296 | * use the first one for SPMA */ | |
5bab87e6 YZ |
297 | real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ? |
298 | vlan_dev_real_dev(netdev) : netdev; | |
54b649f8 | 299 | rcu_read_lock(); |
5bab87e6 | 300 | for_each_dev_addr(real_dev, ha) { |
54b649f8 | 301 | if ((ha->type == NETDEV_HW_ADDR_T_SAN) && |
bf361707 | 302 | (is_valid_ether_addr(ha->addr))) { |
54b649f8 CL |
303 | memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); |
304 | fip->spma = 1; | |
305 | break; | |
306 | } | |
307 | } | |
308 | rcu_read_unlock(); | |
309 | ||
310 | /* setup Source Mac Address */ | |
311 | if (!fip->spma) | |
312 | memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); | |
313 | ||
314 | /* | |
315 | * Add FCoE MAC address as second unicast MAC address | |
316 | * or enter promiscuous mode if not capable of listening | |
317 | * for multiple unicast MACs. | |
318 | */ | |
54b649f8 | 319 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
a748ee24 | 320 | dev_uc_add(netdev, flogi_maddr); |
54b649f8 | 321 | if (fip->spma) |
a748ee24 | 322 | dev_uc_add(netdev, fip->ctl_src_addr); |
e10f8c66 JE |
323 | if (fip->mode == FIP_MODE_VN2VN) { |
324 | dev_mc_add(netdev, FIP_ALL_VN2VN_MACS); | |
325 | dev_mc_add(netdev, FIP_ALL_P2P_MACS); | |
326 | } else | |
327 | dev_mc_add(netdev, FIP_ALL_ENODE_MACS); | |
54b649f8 CL |
328 | |
329 | /* | |
330 | * setup the receive function from ethernet driver | |
331 | * on the ethertype for the given device | |
332 | */ | |
333 | fcoe->fcoe_packet_type.func = fcoe_rcv; | |
334 | fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE); | |
335 | fcoe->fcoe_packet_type.dev = netdev; | |
336 | dev_add_pack(&fcoe->fcoe_packet_type); | |
337 | ||
338 | fcoe->fip_packet_type.func = fcoe_fip_recv; | |
339 | fcoe->fip_packet_type.type = htons(ETH_P_FIP); | |
340 | fcoe->fip_packet_type.dev = netdev; | |
341 | dev_add_pack(&fcoe->fip_packet_type); | |
342 | ||
343 | return 0; | |
344 | } | |
345 | ||
030f4e00 | 346 | /** |
1875f27e RL |
347 | * fcoe_interface_create() - Create a FCoE interface on a net device |
348 | * @netdev: The net device to create the FCoE interface on | |
1dd454d9 | 349 | * @fip_mode: The mode to use for FIP |
030f4e00 CL |
350 | * |
351 | * Returns: pointer to a struct fcoe_interface or NULL on error | |
352 | */ | |
1dd454d9 JE |
353 | static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev, |
354 | enum fip_state fip_mode) | |
030f4e00 CL |
355 | { |
356 | struct fcoe_interface *fcoe; | |
59d92516 | 357 | int err; |
030f4e00 CL |
358 | |
359 | fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL); | |
360 | if (!fcoe) { | |
361 | FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n"); | |
362 | return NULL; | |
363 | } | |
364 | ||
2e70e241 | 365 | dev_hold(netdev); |
030f4e00 | 366 | kref_init(&fcoe->kref); |
54b649f8 CL |
367 | |
368 | /* | |
369 | * Initialize FIP. | |
370 | */ | |
1dd454d9 | 371 | fcoe_ctlr_init(&fcoe->ctlr, fip_mode); |
54b649f8 CL |
372 | fcoe->ctlr.send = fcoe_fip_send; |
373 | fcoe->ctlr.update_mac = fcoe_update_src_mac; | |
11b56188 | 374 | fcoe->ctlr.get_src_addr = fcoe_get_src_mac; |
54b649f8 | 375 | |
59d92516 | 376 | err = fcoe_interface_setup(fcoe, netdev); |
377 | if (err) { | |
378 | fcoe_ctlr_destroy(&fcoe->ctlr); | |
379 | kfree(fcoe); | |
380 | dev_put(netdev); | |
381 | return NULL; | |
382 | } | |
030f4e00 CL |
383 | |
384 | return fcoe; | |
385 | } | |
386 | ||
54b649f8 | 387 | /** |
1875f27e RL |
388 | * fcoe_interface_cleanup() - Clean up a FCoE interface |
389 | * @fcoe: The FCoE interface to be cleaned up | |
2e70e241 CL |
390 | * |
391 | * Caller must be holding the RTNL mutex | |
54b649f8 CL |
392 | */ |
393 | void fcoe_interface_cleanup(struct fcoe_interface *fcoe) | |
394 | { | |
395 | struct net_device *netdev = fcoe->netdev; | |
396 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
397 | u8 flogi_maddr[ETH_ALEN]; | |
b7a727f1 | 398 | const struct net_device_ops *ops; |
54b649f8 CL |
399 | |
400 | /* | |
401 | * Don't listen for Ethernet packets anymore. | |
402 | * synchronize_net() ensures that the packet handlers are not running | |
403 | * on another CPU. dev_remove_pack() would do that, this calls the | |
404 | * unsyncronized version __dev_remove_pack() to avoid multiple delays. | |
405 | */ | |
406 | __dev_remove_pack(&fcoe->fcoe_packet_type); | |
407 | __dev_remove_pack(&fcoe->fip_packet_type); | |
408 | synchronize_net(); | |
409 | ||
54b649f8 | 410 | /* Delete secondary MAC addresses */ |
54b649f8 | 411 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
a748ee24 | 412 | dev_uc_del(netdev, flogi_maddr); |
54b649f8 | 413 | if (fip->spma) |
a748ee24 | 414 | dev_uc_del(netdev, fip->ctl_src_addr); |
e10f8c66 JE |
415 | if (fip->mode == FIP_MODE_VN2VN) { |
416 | dev_mc_del(netdev, FIP_ALL_VN2VN_MACS); | |
417 | dev_mc_del(netdev, FIP_ALL_P2P_MACS); | |
418 | } else | |
419 | dev_mc_del(netdev, FIP_ALL_ENODE_MACS); | |
b7a727f1 YZ |
420 | |
421 | /* Tell the LLD we are done w/ FCoE */ | |
422 | ops = netdev->netdev_ops; | |
423 | if (ops->ndo_fcoe_disable) { | |
424 | if (ops->ndo_fcoe_disable(netdev)) | |
425 | FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" | |
426 | " specific feature for LLD.\n"); | |
427 | } | |
54b649f8 CL |
428 | } |
429 | ||
030f4e00 CL |
430 | /** |
431 | * fcoe_interface_release() - fcoe_port kref release function | |
1875f27e | 432 | * @kref: Embedded reference count in an fcoe_interface struct |
030f4e00 CL |
433 | */ |
434 | static void fcoe_interface_release(struct kref *kref) | |
435 | { | |
436 | struct fcoe_interface *fcoe; | |
2e70e241 | 437 | struct net_device *netdev; |
030f4e00 CL |
438 | |
439 | fcoe = container_of(kref, struct fcoe_interface, kref); | |
2e70e241 CL |
440 | netdev = fcoe->netdev; |
441 | /* tear-down the FCoE controller */ | |
442 | fcoe_ctlr_destroy(&fcoe->ctlr); | |
030f4e00 | 443 | kfree(fcoe); |
2e70e241 | 444 | dev_put(netdev); |
030f4e00 CL |
445 | } |
446 | ||
447 | /** | |
1875f27e RL |
448 | * fcoe_interface_get() - Get a reference to a FCoE interface |
449 | * @fcoe: The FCoE interface to be held | |
030f4e00 CL |
450 | */ |
451 | static inline void fcoe_interface_get(struct fcoe_interface *fcoe) | |
452 | { | |
453 | kref_get(&fcoe->kref); | |
454 | } | |
455 | ||
456 | /** | |
1875f27e RL |
457 | * fcoe_interface_put() - Put a reference to a FCoE interface |
458 | * @fcoe: The FCoE interface to be released | |
030f4e00 CL |
459 | */ |
460 | static inline void fcoe_interface_put(struct fcoe_interface *fcoe) | |
461 | { | |
462 | kref_put(&fcoe->kref, fcoe_interface_release); | |
463 | } | |
464 | ||
ab6b85c1 | 465 | /** |
1875f27e RL |
466 | * fcoe_fip_recv() - Handler for received FIP frames |
467 | * @skb: The receive skb | |
468 | * @netdev: The associated net device | |
469 | * @ptype: The packet_type structure which was used to register this handler | |
470 | * @orig_dev: The original net_device the the skb was received on. | |
471 | * (in case dev is a bond) | |
ab6b85c1 VD |
472 | * |
473 | * Returns: 0 for success | |
474 | */ | |
1875f27e | 475 | static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, |
ab6b85c1 VD |
476 | struct packet_type *ptype, |
477 | struct net_device *orig_dev) | |
478 | { | |
259ad85d | 479 | struct fcoe_interface *fcoe; |
ab6b85c1 | 480 | |
259ad85d | 481 | fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); |
3fe9a0ba | 482 | fcoe_ctlr_recv(&fcoe->ctlr, skb); |
ab6b85c1 VD |
483 | return 0; |
484 | } | |
485 | ||
486 | /** | |
1875f27e RL |
487 | * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame |
488 | * @fip: The FCoE controller | |
489 | * @skb: The FIP packet to be sent | |
ab6b85c1 VD |
490 | */ |
491 | static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
492 | { | |
3fe9a0ba | 493 | skb->dev = fcoe_from_ctlr(fip)->netdev; |
ab6b85c1 VD |
494 | dev_queue_xmit(skb); |
495 | } | |
496 | ||
497 | /** | |
1875f27e RL |
498 | * fcoe_update_src_mac() - Update the Ethernet MAC filters |
499 | * @lport: The local port to update the source MAC on | |
500 | * @addr: Unicast MAC address to add | |
ab6b85c1 VD |
501 | * |
502 | * Remove any previously-set unicast MAC filter. | |
503 | * Add secondary FCoE MAC address filter for our OUI. | |
504 | */ | |
11b56188 | 505 | static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) |
ab6b85c1 | 506 | { |
11b56188 CL |
507 | struct fcoe_port *port = lport_priv(lport); |
508 | struct fcoe_interface *fcoe = port->fcoe; | |
25024989 | 509 | |
ab6b85c1 | 510 | rtnl_lock(); |
11b56188 | 511 | if (!is_zero_ether_addr(port->data_src_addr)) |
a748ee24 | 512 | dev_uc_del(fcoe->netdev, port->data_src_addr); |
11b56188 | 513 | if (!is_zero_ether_addr(addr)) |
a748ee24 | 514 | dev_uc_add(fcoe->netdev, addr); |
11b56188 | 515 | memcpy(port->data_src_addr, addr, ETH_ALEN); |
ab6b85c1 VD |
516 | rtnl_unlock(); |
517 | } | |
518 | ||
11b56188 CL |
519 | /** |
520 | * fcoe_get_src_mac() - return the Ethernet source address for an lport | |
521 | * @lport: libfc lport | |
522 | */ | |
523 | static u8 *fcoe_get_src_mac(struct fc_lport *lport) | |
524 | { | |
525 | struct fcoe_port *port = lport_priv(lport); | |
526 | ||
527 | return port->data_src_addr; | |
528 | } | |
529 | ||
7f349142 | 530 | /** |
1875f27e RL |
531 | * fcoe_lport_config() - Set up a local port |
532 | * @lport: The local port to be setup | |
7f349142 VD |
533 | * |
534 | * Returns: 0 for success | |
535 | */ | |
1875f27e | 536 | static int fcoe_lport_config(struct fc_lport *lport) |
7f349142 | 537 | { |
1875f27e RL |
538 | lport->link_up = 0; |
539 | lport->qfull = 0; | |
540 | lport->max_retry_count = 3; | |
541 | lport->max_rport_retry_count = 3; | |
542 | lport->e_d_tov = 2 * 1000; /* FC-FS default */ | |
543 | lport->r_a_tov = 2 * 2 * 1000; | |
544 | lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | | |
545 | FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); | |
546 | lport->does_npiv = 1; | |
547 | ||
548 | fc_lport_init_stats(lport); | |
7f349142 VD |
549 | |
550 | /* lport fc_lport related configuration */ | |
1875f27e | 551 | fc_lport_config(lport); |
7f349142 VD |
552 | |
553 | /* offload related configuration */ | |
1875f27e RL |
554 | lport->crc_offload = 0; |
555 | lport->seq_offload = 0; | |
556 | lport->lro_enabled = 0; | |
557 | lport->lro_xid = 0; | |
558 | lport->lso_max = 0; | |
7f349142 VD |
559 | |
560 | return 0; | |
561 | } | |
562 | ||
1047f221 | 563 | /** |
1875f27e RL |
564 | * fcoe_queue_timer() - The fcoe queue timer |
565 | * @lport: The local port | |
1047f221 VD |
566 | * |
567 | * Calls fcoe_check_wait_queue on timeout | |
1047f221 | 568 | */ |
1875f27e | 569 | static void fcoe_queue_timer(ulong lport) |
1047f221 | 570 | { |
1875f27e | 571 | fcoe_check_wait_queue((struct fc_lport *)lport, NULL); |
1047f221 VD |
572 | } |
573 | ||
dcece412 YZ |
574 | /** |
575 | * fcoe_get_wwn() - Get the world wide name from LLD if it supports it | |
576 | * @netdev: the associated net device | |
577 | * @wwn: the output WWN | |
578 | * @type: the type of WWN (WWPN or WWNN) | |
579 | * | |
580 | * Returns: 0 for success | |
581 | */ | |
582 | static int fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type) | |
583 | { | |
584 | const struct net_device_ops *ops = netdev->netdev_ops; | |
585 | ||
586 | if (ops->ndo_fcoe_get_wwn) | |
587 | return ops->ndo_fcoe_get_wwn(netdev, wwn, type); | |
588 | return -EINVAL; | |
589 | } | |
590 | ||
54a5b21d YZ |
591 | /** |
592 | * fcoe_netdev_features_change - Updates the lport's offload flags based | |
593 | * on the LLD netdev's FCoE feature flags | |
594 | */ | |
595 | static void fcoe_netdev_features_change(struct fc_lport *lport, | |
596 | struct net_device *netdev) | |
597 | { | |
598 | mutex_lock(&lport->lp_mutex); | |
599 | ||
600 | if (netdev->features & NETIF_F_SG) | |
601 | lport->sg_supp = 1; | |
602 | else | |
603 | lport->sg_supp = 0; | |
604 | ||
605 | if (netdev->features & NETIF_F_FCOE_CRC) { | |
606 | lport->crc_offload = 1; | |
607 | FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); | |
608 | } else { | |
609 | lport->crc_offload = 0; | |
610 | } | |
611 | ||
612 | if (netdev->features & NETIF_F_FSO) { | |
613 | lport->seq_offload = 1; | |
614 | lport->lso_max = netdev->gso_max_size; | |
615 | FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", | |
616 | lport->lso_max); | |
617 | } else { | |
618 | lport->seq_offload = 0; | |
619 | lport->lso_max = 0; | |
620 | } | |
621 | ||
622 | if (netdev->fcoe_ddp_xid) { | |
623 | lport->lro_enabled = 1; | |
624 | lport->lro_xid = netdev->fcoe_ddp_xid; | |
625 | FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", | |
626 | lport->lro_xid); | |
627 | } else { | |
628 | lport->lro_enabled = 0; | |
629 | lport->lro_xid = 0; | |
630 | } | |
631 | ||
632 | mutex_unlock(&lport->lp_mutex); | |
633 | } | |
634 | ||
7f349142 | 635 | /** |
1875f27e RL |
636 | * fcoe_netdev_config() - Set up net devive for SW FCoE |
637 | * @lport: The local port that is associated with the net device | |
638 | * @netdev: The associated net device | |
7f349142 | 639 | * |
1875f27e | 640 | * Must be called after fcoe_lport_config() as it will use local port mutex |
7f349142 | 641 | * |
1875f27e | 642 | * Returns: 0 for success |
7f349142 | 643 | */ |
1875f27e | 644 | static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) |
7f349142 VD |
645 | { |
646 | u32 mfs; | |
647 | u64 wwnn, wwpn; | |
25024989 | 648 | struct fcoe_interface *fcoe; |
014f5c3f | 649 | struct fcoe_port *port; |
7f349142 VD |
650 | |
651 | /* Setup lport private data to point to fcoe softc */ | |
1875f27e | 652 | port = lport_priv(lport); |
25024989 | 653 | fcoe = port->fcoe; |
7f349142 VD |
654 | |
655 | /* | |
656 | * Determine max frame size based on underlying device and optional | |
657 | * user-configured limit. If the MFS is too low, fcoe_link_ok() | |
658 | * will return 0, so do this first. | |
659 | */ | |
7221d7e5 YZ |
660 | mfs = netdev->mtu; |
661 | if (netdev->features & NETIF_F_FCOE_MTU) { | |
662 | mfs = FCOE_MTU; | |
663 | FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); | |
664 | } | |
665 | mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); | |
1875f27e | 666 | if (fc_set_mfs(lport, mfs)) |
7f349142 VD |
667 | return -EINVAL; |
668 | ||
7f349142 | 669 | /* offload features support */ |
54a5b21d | 670 | fcoe_netdev_features_change(lport, netdev); |
7f349142 | 671 | |
014f5c3f CL |
672 | skb_queue_head_init(&port->fcoe_pending_queue); |
673 | port->fcoe_pending_queue_active = 0; | |
1875f27e | 674 | setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport); |
7f349142 | 675 | |
5e4f8fe7 RL |
676 | fcoe_link_speed_update(lport); |
677 | ||
1875f27e | 678 | if (!lport->vport) { |
dcece412 YZ |
679 | if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN)) |
680 | wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0); | |
1875f27e | 681 | fc_set_wwnn(lport, wwnn); |
dcece412 YZ |
682 | if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN)) |
683 | wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, | |
cf4aebca | 684 | 2, 0); |
1875f27e | 685 | fc_set_wwpn(lport, wwpn); |
9a05753b | 686 | } |
7f349142 | 687 | |
7f349142 VD |
688 | return 0; |
689 | } | |
690 | ||
691 | /** | |
1875f27e RL |
692 | * fcoe_shost_config() - Set up the SCSI host associated with a local port |
693 | * @lport: The local port | |
1875f27e | 694 | * @dev: The device associated with the SCSI host |
7f349142 VD |
695 | * |
696 | * Must be called after fcoe_lport_config() and fcoe_netdev_config() | |
697 | * | |
1875f27e | 698 | * Returns: 0 for success |
7f349142 | 699 | */ |
8ba00a4b | 700 | static int fcoe_shost_config(struct fc_lport *lport, struct device *dev) |
7f349142 VD |
701 | { |
702 | int rc = 0; | |
703 | ||
704 | /* lport scsi host config */ | |
1875f27e RL |
705 | lport->host->max_lun = FCOE_MAX_LUN; |
706 | lport->host->max_id = FCOE_MAX_FCP_TARGET; | |
707 | lport->host->max_channel = 0; | |
da87bfab VD |
708 | lport->host->max_cmd_len = FCOE_MAX_CMD_LEN; |
709 | ||
1875f27e RL |
710 | if (lport->vport) |
711 | lport->host->transportt = fcoe_vport_transport_template; | |
e9084bb8 | 712 | else |
1875f27e | 713 | lport->host->transportt = fcoe_transport_template; |
7f349142 VD |
714 | |
715 | /* add the new host to the SCSI-ml */ | |
1875f27e | 716 | rc = scsi_add_host(lport->host, dev); |
7f349142 | 717 | if (rc) { |
1875f27e | 718 | FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " |
d5488eb9 | 719 | "error on scsi_add_host\n"); |
7f349142 VD |
720 | return rc; |
721 | } | |
9a05753b | 722 | |
1875f27e | 723 | if (!lport->vport) |
4be929be | 724 | fc_host_max_npiv_vports(lport->host) = USHRT_MAX; |
9a05753b | 725 | |
1875f27e | 726 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, |
5baa17c3 | 727 | "%s v%s over %s", FCOE_NAME, FCOE_VERSION, |
1875f27e | 728 | fcoe_netdev(lport)->name); |
7f349142 VD |
729 | |
730 | return 0; | |
731 | } | |
732 | ||
1875f27e RL |
733 | /** |
734 | * fcoe_oem_match() - The match routine for the offloaded exchange manager | |
735 | * @fp: The I/O frame | |
d7179680 | 736 | * |
1875f27e RL |
737 | * This routine will be associated with an exchange manager (EM). When |
738 | * the libfc exchange handling code is looking for an EM to use it will | |
739 | * call this routine and pass it the frame that it wishes to send. This | |
740 | * routine will return True if the associated EM is to be used and False | |
741 | * if the echange code should continue looking for an EM. | |
742 | * | |
743 | * The offload EM that this routine is associated with will handle any | |
744 | * packets that are for SCSI read requests. | |
745 | * | |
746 | * Returns: True for read types I/O, otherwise returns false. | |
d7179680 VD |
747 | */ |
748 | bool fcoe_oem_match(struct fc_frame *fp) | |
749 | { | |
05cc7390 YZ |
750 | return fc_fcp_is_read(fr_fsp(fp)) && |
751 | (fr_fsp(fp)->data_len > fcoe_ddp_min); | |
d7179680 VD |
752 | } |
753 | ||
7f349142 | 754 | /** |
1875f27e RL |
755 | * fcoe_em_config() - Allocate and configure an exchange manager |
756 | * @lport: The local port that the new EM will be associated with | |
7f349142 | 757 | * |
1875f27e | 758 | * Returns: 0 on success |
7f349142 | 759 | */ |
1875f27e | 760 | static inline int fcoe_em_config(struct fc_lport *lport) |
7f349142 | 761 | { |
1875f27e | 762 | struct fcoe_port *port = lport_priv(lport); |
25024989 CL |
763 | struct fcoe_interface *fcoe = port->fcoe; |
764 | struct fcoe_interface *oldfcoe = NULL; | |
1d1b88dc | 765 | struct net_device *old_real_dev, *cur_real_dev; |
d7179680 VD |
766 | u16 min_xid = FCOE_MIN_XID; |
767 | u16 max_xid = FCOE_MAX_XID; | |
768 | ||
769 | /* | |
770 | * Check if need to allocate an em instance for | |
771 | * offload exchange ids to be shared across all VN_PORTs/lport. | |
772 | */ | |
1875f27e RL |
773 | if (!lport->lro_enabled || !lport->lro_xid || |
774 | (lport->lro_xid >= max_xid)) { | |
775 | lport->lro_xid = 0; | |
d7179680 VD |
776 | goto skip_oem; |
777 | } | |
778 | ||
779 | /* | |
780 | * Reuse existing offload em instance in case | |
1d1b88dc | 781 | * it is already allocated on real eth device |
d7179680 | 782 | */ |
25024989 CL |
783 | if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
784 | cur_real_dev = vlan_dev_real_dev(fcoe->netdev); | |
1d1b88dc | 785 | else |
25024989 | 786 | cur_real_dev = fcoe->netdev; |
1d1b88dc | 787 | |
25024989 | 788 | list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { |
25024989 CL |
789 | if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
790 | old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); | |
1d1b88dc | 791 | else |
25024989 | 792 | old_real_dev = oldfcoe->netdev; |
1d1b88dc VD |
793 | |
794 | if (cur_real_dev == old_real_dev) { | |
991cbb60 | 795 | fcoe->oem = oldfcoe->oem; |
d7179680 VD |
796 | break; |
797 | } | |
798 | } | |
799 | ||
991cbb60 | 800 | if (fcoe->oem) { |
1875f27e | 801 | if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { |
d7179680 VD |
802 | printk(KERN_ERR "fcoe_em_config: failed to add " |
803 | "offload em:%p on interface:%s\n", | |
991cbb60 | 804 | fcoe->oem, fcoe->netdev->name); |
d7179680 VD |
805 | return -ENOMEM; |
806 | } | |
807 | } else { | |
1875f27e RL |
808 | fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, |
809 | FCOE_MIN_XID, lport->lro_xid, | |
810 | fcoe_oem_match); | |
991cbb60 | 811 | if (!fcoe->oem) { |
d7179680 VD |
812 | printk(KERN_ERR "fcoe_em_config: failed to allocate " |
813 | "em for offload exches on interface:%s\n", | |
25024989 | 814 | fcoe->netdev->name); |
d7179680 VD |
815 | return -ENOMEM; |
816 | } | |
817 | } | |
818 | ||
819 | /* | |
820 | * Exclude offload EM xid range from next EM xid range. | |
821 | */ | |
1875f27e | 822 | min_xid += lport->lro_xid + 1; |
d7179680 VD |
823 | |
824 | skip_oem: | |
1875f27e | 825 | if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { |
d7179680 | 826 | printk(KERN_ERR "fcoe_em_config: failed to " |
25024989 | 827 | "allocate em on interface %s\n", fcoe->netdev->name); |
7f349142 | 828 | return -ENOMEM; |
d7179680 | 829 | } |
7f349142 VD |
830 | |
831 | return 0; | |
832 | } | |
833 | ||
834 | /** | |
1875f27e RL |
835 | * fcoe_if_destroy() - Tear down a SW FCoE instance |
836 | * @lport: The local port to be destroyed | |
34ce27bc VD |
837 | * |
838 | * Locking: must be called with the RTNL mutex held and RTNL mutex | |
839 | * needed to be dropped by this function since not dropping RTNL | |
840 | * would cause circular locking warning on synchronous fip worker | |
841 | * cancelling thru fcoe_interface_put invoked by this function. | |
842 | * | |
7f349142 | 843 | */ |
af7f85d9 | 844 | static void fcoe_if_destroy(struct fc_lport *lport) |
7f349142 | 845 | { |
014f5c3f CL |
846 | struct fcoe_port *port = lport_priv(lport); |
847 | struct fcoe_interface *fcoe = port->fcoe; | |
25024989 | 848 | struct net_device *netdev = fcoe->netdev; |
7f349142 | 849 | |
d5488eb9 | 850 | FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); |
7f349142 | 851 | |
7f349142 | 852 | /* Logout of the fabric */ |
af7f85d9 | 853 | fc_fabric_logoff(lport); |
7f349142 | 854 | |
54b649f8 CL |
855 | /* Cleanup the fc_lport */ |
856 | fc_lport_destroy(lport); | |
54b649f8 CL |
857 | |
858 | /* Stop the transmit retry timer */ | |
859 | del_timer_sync(&port->timer); | |
ab6b85c1 | 860 | |
54b649f8 CL |
861 | /* Free existing transmit skbs */ |
862 | fcoe_clean_pending_queue(lport); | |
863 | ||
11b56188 | 864 | if (!is_zero_ether_addr(port->data_src_addr)) |
a748ee24 | 865 | dev_uc_del(netdev, port->data_src_addr); |
11b56188 CL |
866 | rtnl_unlock(); |
867 | ||
54b649f8 CL |
868 | /* receives may not be stopped until after this */ |
869 | fcoe_interface_put(fcoe); | |
7f349142 | 870 | |
f161fb72 | 871 | /* Free queued packets for the per-CPU receive threads */ |
af7f85d9 | 872 | fcoe_percpu_clean(lport); |
f161fb72 | 873 | |
7f349142 | 874 | /* Detach from the scsi-ml */ |
af7f85d9 CL |
875 | fc_remove_host(lport->host); |
876 | scsi_remove_host(lport->host); | |
7f349142 | 877 | |
80e736f8 YZ |
878 | /* Destroy lport scsi_priv */ |
879 | fc_fcp_destroy(lport); | |
880 | ||
7f349142 | 881 | /* There are no more rports or I/O, free the EM */ |
af7f85d9 | 882 | fc_exch_mgr_free(lport); |
7f349142 | 883 | |
7f349142 | 884 | /* Free memory used by statistical counters */ |
af7f85d9 | 885 | fc_lport_free_stats(lport); |
7f349142 | 886 | |
2e70e241 | 887 | /* Release the Scsi_Host */ |
af7f85d9 | 888 | scsi_host_put(lport->host); |
15af974d | 889 | module_put(THIS_MODULE); |
7f349142 VD |
890 | } |
891 | ||
1875f27e RL |
892 | /** |
893 | * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device | |
894 | * @lport: The local port to setup DDP for | |
895 | * @xid: The exchange ID for this DDP transfer | |
896 | * @sgl: The scatterlist describing this transfer | |
897 | * @sgc: The number of sg items | |
7f349142 | 898 | * |
1875f27e | 899 | * Returns: 0 if the DDP context was not configured |
7f349142 | 900 | */ |
1875f27e RL |
901 | static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, |
902 | struct scatterlist *sgl, unsigned int sgc) | |
7f349142 | 903 | { |
1875f27e | 904 | struct net_device *netdev = fcoe_netdev(lport); |
7f349142 | 905 | |
1875f27e RL |
906 | if (netdev->netdev_ops->ndo_fcoe_ddp_setup) |
907 | return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, | |
908 | xid, sgl, | |
909 | sgc); | |
7f349142 VD |
910 | |
911 | return 0; | |
912 | } | |
913 | ||
1875f27e RL |
914 | /** |
915 | * fcoe_ddp_done() - Call a LLD's ddp_done through the net device | |
916 | * @lport: The local port to complete DDP on | |
917 | * @xid: The exchange ID for this DDP transfer | |
7f349142 | 918 | * |
1875f27e | 919 | * Returns: the length of data that have been completed by DDP |
7f349142 | 920 | */ |
1875f27e | 921 | static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) |
7f349142 | 922 | { |
1875f27e | 923 | struct net_device *netdev = fcoe_netdev(lport); |
7f349142 | 924 | |
1875f27e RL |
925 | if (netdev->netdev_ops->ndo_fcoe_ddp_done) |
926 | return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); | |
7f349142 VD |
927 | return 0; |
928 | } | |
929 | ||
7f349142 | 930 | /** |
1875f27e RL |
931 | * fcoe_if_create() - Create a FCoE instance on an interface |
932 | * @fcoe: The FCoE interface to create a local port on | |
933 | * @parent: The device pointer to be the parent in sysfs for the SCSI host | |
934 | * @npiv: Indicates if the port is a vport or not | |
7f349142 | 935 | * |
1875f27e | 936 | * Creates a fc_lport instance and a Scsi_Host instance and configure them. |
7f349142 | 937 | * |
1875f27e | 938 | * Returns: The allocated fc_lport or an error pointer |
7f349142 | 939 | */ |
030f4e00 | 940 | static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, |
9a05753b | 941 | struct device *parent, int npiv) |
7f349142 | 942 | { |
1875f27e | 943 | struct net_device *netdev = fcoe->netdev; |
af7f85d9 | 944 | struct fc_lport *lport = NULL; |
014f5c3f | 945 | struct fcoe_port *port; |
1875f27e | 946 | int rc; |
9a05753b CL |
947 | /* |
948 | * parent is only a vport if npiv is 1, | |
949 | * but we'll only use vport in that case so go ahead and set it | |
950 | */ | |
951 | struct fc_vport *vport = dev_to_vport(parent); | |
7f349142 | 952 | |
d5488eb9 | 953 | FCOE_NETDEV_DBG(netdev, "Create Interface\n"); |
7f349142 | 954 | |
9a05753b CL |
955 | if (!npiv) { |
956 | lport = libfc_host_alloc(&fcoe_shost_template, | |
957 | sizeof(struct fcoe_port)); | |
958 | } else { | |
959 | lport = libfc_vport_create(vport, | |
960 | sizeof(struct fcoe_port)); | |
961 | } | |
86221969 | 962 | if (!lport) { |
d5488eb9 | 963 | FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); |
af7f85d9 | 964 | rc = -ENOMEM; |
030f4e00 | 965 | goto out; |
7f349142 | 966 | } |
014f5c3f | 967 | port = lport_priv(lport); |
2e70e241 | 968 | port->lport = lport; |
014f5c3f | 969 | port->fcoe = fcoe; |
2e70e241 | 970 | INIT_WORK(&port->destroy_work, fcoe_destroy_work); |
7f349142 | 971 | |
1875f27e | 972 | /* configure a fc_lport including the exchange manager */ |
af7f85d9 | 973 | rc = fcoe_lport_config(lport); |
7f349142 | 974 | if (rc) { |
d5488eb9 RL |
975 | FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " |
976 | "interface\n"); | |
7f349142 VD |
977 | goto out_host_put; |
978 | } | |
979 | ||
9a05753b | 980 | if (npiv) { |
9f8f3aa6 CL |
981 | FCOE_NETDEV_DBG(netdev, "Setting vport names, " |
982 | "%16.16llx %16.16llx\n", | |
1875f27e | 983 | vport->node_name, vport->port_name); |
9a05753b CL |
984 | fc_set_wwnn(lport, vport->node_name); |
985 | fc_set_wwpn(lport, vport->port_name); | |
986 | } | |
987 | ||
ab6b85c1 | 988 | /* configure lport network properties */ |
af7f85d9 | 989 | rc = fcoe_netdev_config(lport, netdev); |
ab6b85c1 | 990 | if (rc) { |
d5488eb9 RL |
991 | FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " |
992 | "interface\n"); | |
54b649f8 | 993 | goto out_lp_destroy; |
ab6b85c1 | 994 | } |
97c8389d | 995 | |
7f349142 | 996 | /* configure lport scsi host properties */ |
8ba00a4b | 997 | rc = fcoe_shost_config(lport, parent); |
7f349142 | 998 | if (rc) { |
d5488eb9 RL |
999 | FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " |
1000 | "interface\n"); | |
54b649f8 | 1001 | goto out_lp_destroy; |
7f349142 VD |
1002 | } |
1003 | ||
96316099 | 1004 | /* Initialize the library */ |
e10f8c66 | 1005 | rc = fcoe_libfc_config(lport, &fcoe->ctlr, &fcoe_libfc_fcn_templ, 1); |
7f349142 | 1006 | if (rc) { |
96316099 | 1007 | FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " |
d5488eb9 | 1008 | "interface\n"); |
96316099 | 1009 | goto out_lp_destroy; |
7f349142 VD |
1010 | } |
1011 | ||
9a05753b CL |
1012 | if (!npiv) { |
1013 | /* | |
1014 | * fcoe_em_alloc() and fcoe_hostlist_add() both | |
1015 | * need to be atomic with respect to other changes to the | |
1016 | * hostlist since fcoe_em_alloc() looks for an existing EM | |
1017 | * instance on host list updated by fcoe_hostlist_add(). | |
1018 | * | |
1019 | * This is currently handled through the fcoe_config_mutex | |
1020 | * begin held. | |
1021 | */ | |
c863df33 | 1022 | |
9a05753b CL |
1023 | /* lport exch manager allocation */ |
1024 | rc = fcoe_em_config(lport); | |
1025 | if (rc) { | |
1026 | FCOE_NETDEV_DBG(netdev, "Could not configure the EM " | |
1875f27e | 1027 | "for the interface\n"); |
9a05753b CL |
1028 | goto out_lp_destroy; |
1029 | } | |
7f349142 VD |
1030 | } |
1031 | ||
030f4e00 | 1032 | fcoe_interface_get(fcoe); |
af7f85d9 | 1033 | return lport; |
7f349142 VD |
1034 | |
1035 | out_lp_destroy: | |
af7f85d9 | 1036 | fc_exch_mgr_free(lport); |
7f349142 | 1037 | out_host_put: |
af7f85d9 CL |
1038 | scsi_host_put(lport->host); |
1039 | out: | |
1040 | return ERR_PTR(rc); | |
7f349142 VD |
1041 | } |
1042 | ||
1043 | /** | |
1875f27e | 1044 | * fcoe_if_init() - Initialization routine for fcoe.ko |
7f349142 | 1045 | * |
1875f27e RL |
1046 | * Attaches the SW FCoE transport to the FC transport |
1047 | * | |
1048 | * Returns: 0 on success | |
7f349142 VD |
1049 | */ |
1050 | static int __init fcoe_if_init(void) | |
1051 | { | |
1052 | /* attach to scsi transport */ | |
e9084bb8 CL |
1053 | fcoe_transport_template = fc_attach_transport(&fcoe_transport_function); |
1054 | fcoe_vport_transport_template = | |
1055 | fc_attach_transport(&fcoe_vport_transport_function); | |
7f349142 | 1056 | |
e9084bb8 | 1057 | if (!fcoe_transport_template) { |
d5488eb9 | 1058 | printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); |
7f349142 VD |
1059 | return -ENODEV; |
1060 | } | |
1061 | ||
1062 | return 0; | |
1063 | } | |
1064 | ||
1065 | /** | |
1875f27e RL |
1066 | * fcoe_if_exit() - Tear down fcoe.ko |
1067 | * | |
1068 | * Detaches the SW FCoE transport from the FC transport | |
7f349142 | 1069 | * |
1875f27e | 1070 | * Returns: 0 on success |
7f349142 VD |
1071 | */ |
1072 | int __exit fcoe_if_exit(void) | |
1073 | { | |
e9084bb8 CL |
1074 | fc_release_transport(fcoe_transport_template); |
1075 | fc_release_transport(fcoe_vport_transport_template); | |
1076 | fcoe_transport_template = NULL; | |
1077 | fcoe_vport_transport_template = NULL; | |
7f349142 VD |
1078 | return 0; |
1079 | } | |
1080 | ||
8976f424 | 1081 | /** |
1875f27e RL |
1082 | * fcoe_percpu_thread_create() - Create a receive thread for an online CPU |
1083 | * @cpu: The CPU index of the CPU to create a receive thread for | |
8976f424 RL |
1084 | */ |
1085 | static void fcoe_percpu_thread_create(unsigned int cpu) | |
1086 | { | |
1087 | struct fcoe_percpu_s *p; | |
1088 | struct task_struct *thread; | |
1089 | ||
1090 | p = &per_cpu(fcoe_percpu, cpu); | |
1091 | ||
1092 | thread = kthread_create(fcoe_percpu_receive_thread, | |
1093 | (void *)p, "fcoethread/%d", cpu); | |
1094 | ||
e7a51997 | 1095 | if (likely(!IS_ERR(thread))) { |
8976f424 RL |
1096 | kthread_bind(thread, cpu); |
1097 | wake_up_process(thread); | |
1098 | ||
1099 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1100 | p->thread = thread; | |
1101 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1102 | } | |
1103 | } | |
1104 | ||
1105 | /** | |
1875f27e RL |
1106 | * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU |
1107 | * @cpu: The CPU index of the CPU whose receive thread is to be destroyed | |
8976f424 RL |
1108 | * |
1109 | * Destroys a per-CPU Rx thread. Any pending skbs are moved to the | |
1110 | * current CPU's Rx thread. If the thread being destroyed is bound to | |
1111 | * the CPU processing this context the skbs will be freed. | |
1112 | */ | |
1113 | static void fcoe_percpu_thread_destroy(unsigned int cpu) | |
1114 | { | |
1115 | struct fcoe_percpu_s *p; | |
1116 | struct task_struct *thread; | |
1117 | struct page *crc_eof; | |
1118 | struct sk_buff *skb; | |
1119 | #ifdef CONFIG_SMP | |
1120 | struct fcoe_percpu_s *p0; | |
f018b73a | 1121 | unsigned targ_cpu = get_cpu(); |
8976f424 RL |
1122 | #endif /* CONFIG_SMP */ |
1123 | ||
d5488eb9 | 1124 | FCOE_DBG("Destroying receive thread for CPU %d\n", cpu); |
8976f424 RL |
1125 | |
1126 | /* Prevent any new skbs from being queued for this CPU. */ | |
1127 | p = &per_cpu(fcoe_percpu, cpu); | |
1128 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1129 | thread = p->thread; | |
1130 | p->thread = NULL; | |
1131 | crc_eof = p->crc_eof_page; | |
1132 | p->crc_eof_page = NULL; | |
1133 | p->crc_eof_offset = 0; | |
1134 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1135 | ||
1136 | #ifdef CONFIG_SMP | |
1137 | /* | |
1138 | * Don't bother moving the skb's if this context is running | |
1139 | * on the same CPU that is having its thread destroyed. This | |
1140 | * can easily happen when the module is removed. | |
1141 | */ | |
1142 | if (cpu != targ_cpu) { | |
1143 | p0 = &per_cpu(fcoe_percpu, targ_cpu); | |
1144 | spin_lock_bh(&p0->fcoe_rx_list.lock); | |
1145 | if (p0->thread) { | |
d5488eb9 RL |
1146 | FCOE_DBG("Moving frames from CPU %d to CPU %d\n", |
1147 | cpu, targ_cpu); | |
8976f424 RL |
1148 | |
1149 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1150 | __skb_queue_tail(&p0->fcoe_rx_list, skb); | |
1151 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
1152 | } else { | |
1153 | /* | |
1154 | * The targeted CPU is not initialized and cannot accept | |
1875f27e | 1155 | * new skbs. Unlock the targeted CPU and drop the skbs |
8976f424 RL |
1156 | * on the CPU that is going offline. |
1157 | */ | |
1158 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1159 | kfree_skb(skb); | |
1160 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
1161 | } | |
1162 | } else { | |
1163 | /* | |
1164 | * This scenario occurs when the module is being removed | |
1165 | * and all threads are being destroyed. skbs will continue | |
1166 | * to be shifted from the CPU thread that is being removed | |
1167 | * to the CPU thread associated with the CPU that is processing | |
1168 | * the module removal. Once there is only one CPU Rx thread it | |
1169 | * will reach this case and we will drop all skbs and later | |
1170 | * stop the thread. | |
1171 | */ | |
1172 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1173 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1174 | kfree_skb(skb); | |
1175 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1176 | } | |
f018b73a | 1177 | put_cpu(); |
8976f424 RL |
1178 | #else |
1179 | /* | |
dd3fd72e | 1180 | * This a non-SMP scenario where the singular Rx thread is |
8976f424 RL |
1181 | * being removed. Free all skbs and stop the thread. |
1182 | */ | |
1183 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1184 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1185 | kfree_skb(skb); | |
1186 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1187 | #endif | |
1188 | ||
1189 | if (thread) | |
1190 | kthread_stop(thread); | |
1191 | ||
1192 | if (crc_eof) | |
1193 | put_page(crc_eof); | |
1194 | } | |
1195 | ||
1196 | /** | |
1875f27e RL |
1197 | * fcoe_cpu_callback() - Handler for CPU hotplug events |
1198 | * @nfb: The callback data block | |
1199 | * @action: The event triggering the callback | |
1200 | * @hcpu: The index of the CPU that the event is for | |
8976f424 | 1201 | * |
1875f27e | 1202 | * This creates or destroys per-CPU data for fcoe |
8976f424 RL |
1203 | * |
1204 | * Returns NOTIFY_OK always. | |
1205 | */ | |
1206 | static int fcoe_cpu_callback(struct notifier_block *nfb, | |
1207 | unsigned long action, void *hcpu) | |
1208 | { | |
1209 | unsigned cpu = (unsigned long)hcpu; | |
1210 | ||
1211 | switch (action) { | |
1212 | case CPU_ONLINE: | |
1213 | case CPU_ONLINE_FROZEN: | |
d5488eb9 | 1214 | FCOE_DBG("CPU %x online: Create Rx thread\n", cpu); |
8976f424 RL |
1215 | fcoe_percpu_thread_create(cpu); |
1216 | break; | |
1217 | case CPU_DEAD: | |
1218 | case CPU_DEAD_FROZEN: | |
d5488eb9 | 1219 | FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu); |
8976f424 RL |
1220 | fcoe_percpu_thread_destroy(cpu); |
1221 | break; | |
1222 | default: | |
1223 | break; | |
1224 | } | |
1225 | return NOTIFY_OK; | |
1226 | } | |
1227 | ||
85b4aa49 | 1228 | /** |
1875f27e RL |
1229 | * fcoe_rcv() - Receive packets from a net device |
1230 | * @skb: The received packet | |
1231 | * @netdev: The net device that the packet was received on | |
1232 | * @ptype: The packet type context | |
1233 | * @olddev: The last device net device | |
85b4aa49 | 1234 | * |
1875f27e RL |
1235 | * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a |
1236 | * FC frame and passes the frame to libfc. | |
85b4aa49 RL |
1237 | * |
1238 | * Returns: 0 for success | |
34f42a07 | 1239 | */ |
1875f27e | 1240 | int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, |
85b4aa49 RL |
1241 | struct packet_type *ptype, struct net_device *olddev) |
1242 | { | |
1875f27e | 1243 | struct fc_lport *lport; |
85b4aa49 | 1244 | struct fcoe_rcv_info *fr; |
259ad85d | 1245 | struct fcoe_interface *fcoe; |
85b4aa49 | 1246 | struct fc_frame_header *fh; |
85b4aa49 | 1247 | struct fcoe_percpu_s *fps; |
519e5135 | 1248 | struct ethhdr *eh; |
b2f0091f | 1249 | unsigned int cpu; |
85b4aa49 | 1250 | |
259ad85d | 1251 | fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); |
1875f27e RL |
1252 | lport = fcoe->ctlr.lp; |
1253 | if (unlikely(!lport)) { | |
1254 | FCOE_NETDEV_DBG(netdev, "Cannot find hba structure"); | |
85b4aa49 RL |
1255 | goto err2; |
1256 | } | |
1875f27e | 1257 | if (!lport->link_up) |
97c8389d | 1258 | goto err2; |
85b4aa49 | 1259 | |
1875f27e | 1260 | FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p " |
d5488eb9 RL |
1261 | "data:%p tail:%p end:%p sum:%d dev:%s", |
1262 | skb->len, skb->data_len, skb->head, skb->data, | |
1263 | skb_tail_pointer(skb), skb_end_pointer(skb), | |
1264 | skb->csum, skb->dev ? skb->dev->name : "<NULL>"); | |
85b4aa49 | 1265 | |
519e5135 | 1266 | eh = eth_hdr(skb); |
519e5135 VD |
1267 | |
1268 | if (is_fip_mode(&fcoe->ctlr) && | |
1269 | compare_ether_addr(eh->h_source, fcoe->ctlr.dest_addr)) { | |
1270 | FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n", | |
1271 | eh->h_source); | |
85b4aa49 RL |
1272 | goto err; |
1273 | } | |
1274 | ||
1275 | /* | |
1276 | * Check for minimum frame length, and make sure required FCoE | |
1277 | * and FC headers are pulled into the linear data area. | |
1278 | */ | |
1279 | if (unlikely((skb->len < FCOE_MIN_FRAME) || | |
1875f27e | 1280 | !pskb_may_pull(skb, FCOE_HEADER_LEN))) |
85b4aa49 RL |
1281 | goto err; |
1282 | ||
1283 | skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); | |
1284 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1285 | ||
0ee31cb5 RL |
1286 | if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) { |
1287 | FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n", | |
1288 | eh->h_dest); | |
1289 | goto err; | |
1290 | } | |
1291 | ||
85b4aa49 | 1292 | fr = fcoe_dev_from_skb(skb); |
1875f27e | 1293 | fr->fr_dev = lport; |
85b4aa49 | 1294 | fr->ptype = ptype; |
5e5e92df | 1295 | |
85b4aa49 | 1296 | /* |
b2f0091f VD |
1297 | * In case the incoming frame's exchange is originated from |
1298 | * the initiator, then received frame's exchange id is ANDed | |
1299 | * with fc_cpu_mask bits to get the same cpu on which exchange | |
1300 | * was originated, otherwise just use the current cpu. | |
85b4aa49 | 1301 | */ |
b2f0091f VD |
1302 | if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) |
1303 | cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; | |
1304 | else | |
1305 | cpu = smp_processor_id(); | |
5e5e92df | 1306 | |
8976f424 | 1307 | fps = &per_cpu(fcoe_percpu, cpu); |
85b4aa49 | 1308 | spin_lock_bh(&fps->fcoe_rx_list.lock); |
8976f424 RL |
1309 | if (unlikely(!fps->thread)) { |
1310 | /* | |
1311 | * The targeted CPU is not ready, let's target | |
1312 | * the first CPU now. For non-SMP systems this | |
1313 | * will check the same CPU twice. | |
1314 | */ | |
1875f27e | 1315 | FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread " |
d5488eb9 RL |
1316 | "ready for incoming skb- using first online " |
1317 | "CPU.\n"); | |
8976f424 RL |
1318 | |
1319 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
6957177f | 1320 | cpu = cpumask_first(cpu_online_mask); |
8976f424 RL |
1321 | fps = &per_cpu(fcoe_percpu, cpu); |
1322 | spin_lock_bh(&fps->fcoe_rx_list.lock); | |
1323 | if (!fps->thread) { | |
1324 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1325 | goto err; | |
1326 | } | |
1327 | } | |
1328 | ||
1329 | /* | |
1330 | * We now have a valid CPU that we're targeting for | |
1331 | * this skb. We also have this receive thread locked, | |
1332 | * so we're free to queue skbs into it's queue. | |
1333 | */ | |
85b4aa49 | 1334 | |
859b7b64 CL |
1335 | /* If this is a SCSI-FCP frame, and this is already executing on the |
1336 | * correct CPU, and the queue for this CPU is empty, then go ahead | |
1337 | * and process the frame directly in the softirq context. | |
1338 | * This lets us process completions without context switching from the | |
1339 | * NET_RX softirq, to our receive processing thread, and then back to | |
1340 | * BLOCK softirq context. | |
1341 | */ | |
1342 | if (fh->fh_type == FC_TYPE_FCP && | |
1343 | cpu == smp_processor_id() && | |
1344 | skb_queue_empty(&fps->fcoe_rx_list)) { | |
1345 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1346 | fcoe_recv_frame(skb); | |
1347 | } else { | |
1348 | __skb_queue_tail(&fps->fcoe_rx_list, skb); | |
1349 | if (fps->fcoe_rx_list.qlen == 1) | |
1350 | wake_up_process(fps->thread); | |
1351 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1352 | } | |
85b4aa49 RL |
1353 | |
1354 | return 0; | |
1355 | err: | |
f018b73a JE |
1356 | per_cpu_ptr(lport->dev_stats, get_cpu())->ErrorFrames++; |
1357 | put_cpu(); | |
85b4aa49 RL |
1358 | err2: |
1359 | kfree_skb(skb); | |
1360 | return -1; | |
1361 | } | |
85b4aa49 RL |
1362 | |
1363 | /** | |
1875f27e RL |
1364 | * fcoe_start_io() - Start FCoE I/O |
1365 | * @skb: The packet to be transmitted | |
1366 | * | |
1367 | * This routine is called from the net device to start transmitting | |
1368 | * FCoE packets. | |
85b4aa49 RL |
1369 | * |
1370 | * Returns: 0 for success | |
34f42a07 | 1371 | */ |
85b4aa49 RL |
1372 | static inline int fcoe_start_io(struct sk_buff *skb) |
1373 | { | |
18fa11ef | 1374 | struct sk_buff *nskb; |
85b4aa49 RL |
1375 | int rc; |
1376 | ||
18fa11ef CL |
1377 | nskb = skb_clone(skb, GFP_ATOMIC); |
1378 | rc = dev_queue_xmit(nskb); | |
85b4aa49 RL |
1379 | if (rc != 0) |
1380 | return rc; | |
1381 | kfree_skb(skb); | |
1382 | return 0; | |
1383 | } | |
1384 | ||
1385 | /** | |
1875f27e RL |
1386 | * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC |
1387 | * @skb: The packet to be transmitted | |
1388 | * @tlen: The total length of the trailer | |
1389 | * | |
1390 | * This routine allocates a page for frame trailers. The page is re-used if | |
1391 | * there is enough room left on it for the current trailer. If there isn't | |
1392 | * enough buffer left a new page is allocated for the trailer. Reference to | |
1393 | * the page from this function as well as the skbs using the page fragments | |
1394 | * ensure that the page is freed at the appropriate time. | |
85b4aa49 RL |
1395 | * |
1396 | * Returns: 0 for success | |
34f42a07 | 1397 | */ |
85b4aa49 RL |
1398 | static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen) |
1399 | { | |
1400 | struct fcoe_percpu_s *fps; | |
1401 | struct page *page; | |
85b4aa49 | 1402 | |
5e5e92df | 1403 | fps = &get_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1404 | page = fps->crc_eof_page; |
1405 | if (!page) { | |
1406 | page = alloc_page(GFP_ATOMIC); | |
1407 | if (!page) { | |
5e5e92df | 1408 | put_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1409 | return -ENOMEM; |
1410 | } | |
1411 | fps->crc_eof_page = page; | |
8976f424 | 1412 | fps->crc_eof_offset = 0; |
85b4aa49 RL |
1413 | } |
1414 | ||
1415 | get_page(page); | |
1416 | skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page, | |
1417 | fps->crc_eof_offset, tlen); | |
1418 | skb->len += tlen; | |
1419 | skb->data_len += tlen; | |
1420 | skb->truesize += tlen; | |
1421 | fps->crc_eof_offset += sizeof(struct fcoe_crc_eof); | |
1422 | ||
1423 | if (fps->crc_eof_offset >= PAGE_SIZE) { | |
1424 | fps->crc_eof_page = NULL; | |
1425 | fps->crc_eof_offset = 0; | |
1426 | put_page(page); | |
1427 | } | |
5e5e92df | 1428 | put_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1429 | return 0; |
1430 | } | |
1431 | ||
1432 | /** | |
1875f27e RL |
1433 | * fcoe_fc_crc() - Calculates the CRC for a given frame |
1434 | * @fp: The frame to be checksumed | |
85b4aa49 | 1435 | * |
1875f27e RL |
1436 | * This uses crc32() routine to calculate the CRC for a frame |
1437 | * | |
1438 | * Return: The 32 bit CRC value | |
34f42a07 | 1439 | */ |
85b4aa49 RL |
1440 | u32 fcoe_fc_crc(struct fc_frame *fp) |
1441 | { | |
1442 | struct sk_buff *skb = fp_skb(fp); | |
1443 | struct skb_frag_struct *frag; | |
1444 | unsigned char *data; | |
1445 | unsigned long off, len, clen; | |
1446 | u32 crc; | |
1447 | unsigned i; | |
1448 | ||
1449 | crc = crc32(~0, skb->data, skb_headlen(skb)); | |
1450 | ||
1451 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1452 | frag = &skb_shinfo(skb)->frags[i]; | |
1453 | off = frag->page_offset; | |
1454 | len = frag->size; | |
1455 | while (len > 0) { | |
1456 | clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK)); | |
1457 | data = kmap_atomic(frag->page + (off >> PAGE_SHIFT), | |
1458 | KM_SKB_DATA_SOFTIRQ); | |
1459 | crc = crc32(crc, data + (off & ~PAGE_MASK), clen); | |
1460 | kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ); | |
1461 | off += clen; | |
1462 | len -= clen; | |
1463 | } | |
1464 | } | |
1465 | return crc; | |
1466 | } | |
85b4aa49 RL |
1467 | |
1468 | /** | |
1875f27e RL |
1469 | * fcoe_xmit() - Transmit a FCoE frame |
1470 | * @lport: The local port that the frame is to be transmitted for | |
1471 | * @fp: The frame to be transmitted | |
85b4aa49 | 1472 | * |
1875f27e | 1473 | * Return: 0 for success |
34f42a07 | 1474 | */ |
1875f27e | 1475 | int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) |
85b4aa49 | 1476 | { |
4bb6b515 | 1477 | int wlen; |
85b4aa49 RL |
1478 | u32 crc; |
1479 | struct ethhdr *eh; | |
1480 | struct fcoe_crc_eof *cp; | |
1481 | struct sk_buff *skb; | |
1482 | struct fcoe_dev_stats *stats; | |
1483 | struct fc_frame_header *fh; | |
1484 | unsigned int hlen; /* header length implies the version */ | |
1485 | unsigned int tlen; /* trailer length */ | |
1486 | unsigned int elen; /* eth header, may include vlan */ | |
1875f27e | 1487 | struct fcoe_port *port = lport_priv(lport); |
3fe9a0ba | 1488 | struct fcoe_interface *fcoe = port->fcoe; |
85b4aa49 RL |
1489 | u8 sof, eof; |
1490 | struct fcoe_hdr *hp; | |
1491 | ||
1492 | WARN_ON((fr_len(fp) % sizeof(u32)) != 0); | |
1493 | ||
85b4aa49 | 1494 | fh = fc_frame_header_get(fp); |
97c8389d JE |
1495 | skb = fp_skb(fp); |
1496 | wlen = skb->len / FCOE_WORD_TO_BYTE; | |
1497 | ||
1875f27e | 1498 | if (!lport->link_up) { |
3caf02ee | 1499 | kfree_skb(skb); |
97c8389d | 1500 | return 0; |
85b4aa49 RL |
1501 | } |
1502 | ||
9860eeb4 | 1503 | if (unlikely(fh->fh_type == FC_TYPE_ELS) && |
1875f27e | 1504 | fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb)) |
97c8389d JE |
1505 | return 0; |
1506 | ||
85b4aa49 RL |
1507 | sof = fr_sof(fp); |
1508 | eof = fr_eof(fp); | |
1509 | ||
4e57e1cb | 1510 | elen = sizeof(struct ethhdr); |
85b4aa49 RL |
1511 | hlen = sizeof(struct fcoe_hdr); |
1512 | tlen = sizeof(struct fcoe_crc_eof); | |
1513 | wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; | |
1514 | ||
1515 | /* crc offload */ | |
1875f27e | 1516 | if (likely(lport->crc_offload)) { |
39ca9a06 | 1517 | skb->ip_summed = CHECKSUM_PARTIAL; |
85b4aa49 RL |
1518 | skb->csum_start = skb_headroom(skb); |
1519 | skb->csum_offset = skb->len; | |
1520 | crc = 0; | |
1521 | } else { | |
1522 | skb->ip_summed = CHECKSUM_NONE; | |
1523 | crc = fcoe_fc_crc(fp); | |
1524 | } | |
1525 | ||
014f5c3f | 1526 | /* copy port crc and eof to the skb buff */ |
85b4aa49 RL |
1527 | if (skb_is_nonlinear(skb)) { |
1528 | skb_frag_t *frag; | |
1529 | if (fcoe_get_paged_crc_eof(skb, tlen)) { | |
e9041581 | 1530 | kfree_skb(skb); |
85b4aa49 RL |
1531 | return -ENOMEM; |
1532 | } | |
1533 | frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; | |
1534 | cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ) | |
1535 | + frag->page_offset; | |
1536 | } else { | |
1537 | cp = (struct fcoe_crc_eof *)skb_put(skb, tlen); | |
1538 | } | |
1539 | ||
1540 | memset(cp, 0, sizeof(*cp)); | |
1541 | cp->fcoe_eof = eof; | |
1542 | cp->fcoe_crc32 = cpu_to_le32(~crc); | |
1543 | ||
1544 | if (skb_is_nonlinear(skb)) { | |
1545 | kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ); | |
1546 | cp = NULL; | |
1547 | } | |
1548 | ||
014f5c3f | 1549 | /* adjust skb network/transport offsets to match mac/fcoe/port */ |
85b4aa49 RL |
1550 | skb_push(skb, elen + hlen); |
1551 | skb_reset_mac_header(skb); | |
1552 | skb_reset_network_header(skb); | |
1553 | skb->mac_len = elen; | |
211c738d | 1554 | skb->protocol = htons(ETH_P_FCOE); |
3fe9a0ba | 1555 | skb->dev = fcoe->netdev; |
85b4aa49 RL |
1556 | |
1557 | /* fill up mac and fcoe headers */ | |
1558 | eh = eth_hdr(skb); | |
1559 | eh->h_proto = htons(ETH_P_FCOE); | |
cd229e42 | 1560 | memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN); |
3fe9a0ba | 1561 | if (fcoe->ctlr.map_dest) |
cd229e42 | 1562 | memcpy(eh->h_dest + 3, fh->fh_d_id, 3); |
85b4aa49 | 1563 | |
3fe9a0ba CL |
1564 | if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN)) |
1565 | memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN); | |
85b4aa49 | 1566 | else |
11b56188 | 1567 | memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); |
85b4aa49 RL |
1568 | |
1569 | hp = (struct fcoe_hdr *)(eh + 1); | |
1570 | memset(hp, 0, sizeof(*hp)); | |
1571 | if (FC_FCOE_VER) | |
1572 | FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); | |
1573 | hp->fcoe_sof = sof; | |
1574 | ||
39ca9a06 | 1575 | /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ |
1875f27e | 1576 | if (lport->seq_offload && fr_max_payload(fp)) { |
39ca9a06 YZ |
1577 | skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; |
1578 | skb_shinfo(skb)->gso_size = fr_max_payload(fp); | |
1579 | } else { | |
1580 | skb_shinfo(skb)->gso_type = 0; | |
1581 | skb_shinfo(skb)->gso_size = 0; | |
1582 | } | |
85b4aa49 | 1583 | /* update tx stats: regardless if LLD fails */ |
f018b73a | 1584 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); |
582b45bc RL |
1585 | stats->TxFrames++; |
1586 | stats->TxWords += wlen; | |
f018b73a | 1587 | put_cpu(); |
85b4aa49 RL |
1588 | |
1589 | /* send down to lld */ | |
1875f27e | 1590 | fr_dev(fp) = lport; |
014f5c3f | 1591 | if (port->fcoe_pending_queue.qlen) |
1875f27e | 1592 | fcoe_check_wait_queue(lport, skb); |
4bb6b515 | 1593 | else if (fcoe_start_io(skb)) |
1875f27e | 1594 | fcoe_check_wait_queue(lport, skb); |
85b4aa49 RL |
1595 | |
1596 | return 0; | |
1597 | } | |
85b4aa49 | 1598 | |
e7a51997 | 1599 | /** |
1875f27e RL |
1600 | * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion |
1601 | * @skb: The completed skb (argument required by destructor) | |
e7a51997 JE |
1602 | */ |
1603 | static void fcoe_percpu_flush_done(struct sk_buff *skb) | |
1604 | { | |
1605 | complete(&fcoe_flush_completion); | |
1606 | } | |
1607 | ||
34f42a07 | 1608 | /** |
859b7b64 CL |
1609 | * fcoe_recv_frame() - process a single received frame |
1610 | * @skb: frame to process | |
85b4aa49 | 1611 | */ |
859b7b64 | 1612 | static void fcoe_recv_frame(struct sk_buff *skb) |
85b4aa49 | 1613 | { |
85b4aa49 | 1614 | u32 fr_len; |
1875f27e | 1615 | struct fc_lport *lport; |
85b4aa49 RL |
1616 | struct fcoe_rcv_info *fr; |
1617 | struct fcoe_dev_stats *stats; | |
1618 | struct fc_frame_header *fh; | |
85b4aa49 RL |
1619 | struct fcoe_crc_eof crc_eof; |
1620 | struct fc_frame *fp; | |
014f5c3f | 1621 | struct fcoe_port *port; |
85b4aa49 RL |
1622 | struct fcoe_hdr *hp; |
1623 | ||
859b7b64 CL |
1624 | fr = fcoe_dev_from_skb(skb); |
1625 | lport = fr->fr_dev; | |
1626 | if (unlikely(!lport)) { | |
1627 | if (skb->destructor != fcoe_percpu_flush_done) | |
1628 | FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb"); | |
1629 | kfree_skb(skb); | |
1630 | return; | |
1631 | } | |
1632 | ||
1633 | FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d " | |
1634 | "head:%p data:%p tail:%p end:%p sum:%d dev:%s", | |
1635 | skb->len, skb->data_len, | |
1636 | skb->head, skb->data, skb_tail_pointer(skb), | |
1637 | skb_end_pointer(skb), skb->csum, | |
1638 | skb->dev ? skb->dev->name : "<NULL>"); | |
1639 | ||
859b7b64 CL |
1640 | port = lport_priv(lport); |
1641 | if (skb_is_nonlinear(skb)) | |
1642 | skb_linearize(skb); /* not ideal */ | |
859b7b64 CL |
1643 | |
1644 | /* | |
1645 | * Frame length checks and setting up the header pointers | |
1646 | * was done in fcoe_rcv already. | |
1647 | */ | |
1648 | hp = (struct fcoe_hdr *) skb_network_header(skb); | |
1649 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1650 | ||
f018b73a | 1651 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); |
859b7b64 CL |
1652 | if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { |
1653 | if (stats->ErrorFrames < 5) | |
1654 | printk(KERN_WARNING "fcoe: FCoE version " | |
1655 | "mismatch: The frame has " | |
1656 | "version %x, but the " | |
1657 | "initiator supports version " | |
1658 | "%x\n", FC_FCOE_DECAPS_VER(hp), | |
1659 | FC_FCOE_VER); | |
f018b73a | 1660 | goto drop; |
859b7b64 CL |
1661 | } |
1662 | ||
1663 | skb_pull(skb, sizeof(struct fcoe_hdr)); | |
1664 | fr_len = skb->len - sizeof(struct fcoe_crc_eof); | |
1665 | ||
1666 | stats->RxFrames++; | |
1667 | stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; | |
1668 | ||
1669 | fp = (struct fc_frame *)skb; | |
1670 | fc_frame_init(fp); | |
1671 | fr_dev(fp) = lport; | |
1672 | fr_sof(fp) = hp->fcoe_sof; | |
1673 | ||
1674 | /* Copy out the CRC and EOF trailer for access */ | |
f018b73a JE |
1675 | if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) |
1676 | goto drop; | |
859b7b64 CL |
1677 | fr_eof(fp) = crc_eof.fcoe_eof; |
1678 | fr_crc(fp) = crc_eof.fcoe_crc32; | |
f018b73a JE |
1679 | if (pskb_trim(skb, fr_len)) |
1680 | goto drop; | |
859b7b64 CL |
1681 | |
1682 | /* | |
1683 | * We only check CRC if no offload is available and if it is | |
1684 | * it's solicited data, in which case, the FCP layer would | |
1685 | * check it during the copy. | |
1686 | */ | |
1687 | if (lport->crc_offload && | |
1688 | skb->ip_summed == CHECKSUM_UNNECESSARY) | |
1689 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; | |
1690 | else | |
1691 | fr_flags(fp) |= FCPHF_CRC_UNCHECKED; | |
1692 | ||
1693 | fh = fc_frame_header_get(fp); | |
f018b73a JE |
1694 | if ((fh->fh_r_ctl != FC_RCTL_DD_SOL_DATA || |
1695 | fh->fh_type != FC_TYPE_FCP) && | |
1696 | (fr_flags(fp) & FCPHF_CRC_UNCHECKED)) { | |
859b7b64 CL |
1697 | if (le32_to_cpu(fr_crc(fp)) != |
1698 | ~crc32(~0, skb->data, fr_len)) { | |
1699 | if (stats->InvalidCRCCount < 5) | |
1700 | printk(KERN_WARNING "fcoe: dropping " | |
1701 | "frame with CRC error\n"); | |
1702 | stats->InvalidCRCCount++; | |
f018b73a | 1703 | goto drop; |
859b7b64 CL |
1704 | } |
1705 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; | |
1706 | } | |
f018b73a | 1707 | put_cpu(); |
859b7b64 | 1708 | fc_exch_recv(lport, fp); |
f018b73a JE |
1709 | return; |
1710 | ||
1711 | drop: | |
1712 | stats->ErrorFrames++; | |
1713 | put_cpu(); | |
1714 | kfree_skb(skb); | |
859b7b64 CL |
1715 | } |
1716 | ||
1717 | /** | |
1718 | * fcoe_percpu_receive_thread() - The per-CPU packet receive thread | |
1719 | * @arg: The per-CPU context | |
1720 | * | |
1721 | * Return: 0 for success | |
1722 | */ | |
1723 | int fcoe_percpu_receive_thread(void *arg) | |
1724 | { | |
1725 | struct fcoe_percpu_s *p = arg; | |
1726 | struct sk_buff *skb; | |
1727 | ||
4469c195 | 1728 | set_user_nice(current, -20); |
85b4aa49 RL |
1729 | |
1730 | while (!kthread_should_stop()) { | |
1731 | ||
1732 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1733 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) { | |
1734 | set_current_state(TASK_INTERRUPTIBLE); | |
1735 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1736 | schedule(); | |
1737 | set_current_state(TASK_RUNNING); | |
1738 | if (kthread_should_stop()) | |
1739 | return 0; | |
1740 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1741 | } | |
1742 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
859b7b64 | 1743 | fcoe_recv_frame(skb); |
85b4aa49 RL |
1744 | } |
1745 | return 0; | |
1746 | } | |
1747 | ||
85b4aa49 | 1748 | /** |
1875f27e RL |
1749 | * fcoe_check_wait_queue() - Attempt to clear the transmit backlog |
1750 | * @lport: The local port whose backlog is to be cleared | |
85b4aa49 | 1751 | * |
1875f27e RL |
1752 | * This empties the wait_queue, dequeues the head of the wait_queue queue |
1753 | * and calls fcoe_start_io() for each packet. If all skb have been | |
1754 | * transmitted it returns the qlen. If an error occurs it restores | |
1755 | * wait_queue (to try again later) and returns -1. | |
85b4aa49 | 1756 | * |
1875f27e RL |
1757 | * The wait_queue is used when the skb transmit fails. The failed skb |
1758 | * will go in the wait_queue which will be emptied by the timer function or | |
85b4aa49 | 1759 | * by the next skb transmit. |
34f42a07 | 1760 | */ |
1875f27e | 1761 | static void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb) |
85b4aa49 | 1762 | { |
1875f27e | 1763 | struct fcoe_port *port = lport_priv(lport); |
4bb6b515 | 1764 | int rc; |
85b4aa49 | 1765 | |
014f5c3f | 1766 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
4bb6b515 VD |
1767 | |
1768 | if (skb) | |
014f5c3f | 1769 | __skb_queue_tail(&port->fcoe_pending_queue, skb); |
4bb6b515 | 1770 | |
014f5c3f | 1771 | if (port->fcoe_pending_queue_active) |
c826a314 | 1772 | goto out; |
014f5c3f | 1773 | port->fcoe_pending_queue_active = 1; |
55c8bafb | 1774 | |
014f5c3f | 1775 | while (port->fcoe_pending_queue.qlen) { |
55c8bafb | 1776 | /* keep qlen > 0 until fcoe_start_io succeeds */ |
014f5c3f CL |
1777 | port->fcoe_pending_queue.qlen++; |
1778 | skb = __skb_dequeue(&port->fcoe_pending_queue); | |
55c8bafb | 1779 | |
014f5c3f | 1780 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
55c8bafb | 1781 | rc = fcoe_start_io(skb); |
014f5c3f | 1782 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
55c8bafb CL |
1783 | |
1784 | if (rc) { | |
014f5c3f | 1785 | __skb_queue_head(&port->fcoe_pending_queue, skb); |
55c8bafb | 1786 | /* undo temporary increment above */ |
014f5c3f | 1787 | port->fcoe_pending_queue.qlen--; |
55c8bafb | 1788 | break; |
85b4aa49 | 1789 | } |
55c8bafb | 1790 | /* undo temporary increment above */ |
014f5c3f | 1791 | port->fcoe_pending_queue.qlen--; |
85b4aa49 | 1792 | } |
55c8bafb | 1793 | |
014f5c3f | 1794 | if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH) |
1875f27e | 1795 | lport->qfull = 0; |
014f5c3f CL |
1796 | if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer)) |
1797 | mod_timer(&port->timer, jiffies + 2); | |
1798 | port->fcoe_pending_queue_active = 0; | |
c826a314 | 1799 | out: |
014f5c3f | 1800 | if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH) |
1875f27e | 1801 | lport->qfull = 1; |
014f5c3f | 1802 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
4bb6b515 | 1803 | return; |
85b4aa49 RL |
1804 | } |
1805 | ||
85b4aa49 | 1806 | /** |
1875f27e | 1807 | * fcoe_dev_setup() - Setup the link change notification interface |
34f42a07 | 1808 | */ |
b0d428ad | 1809 | static void fcoe_dev_setup(void) |
85b4aa49 | 1810 | { |
85b4aa49 RL |
1811 | register_netdevice_notifier(&fcoe_notifier); |
1812 | } | |
1813 | ||
1814 | /** | |
1875f27e | 1815 | * fcoe_dev_cleanup() - Cleanup the link change notification interface |
34f42a07 | 1816 | */ |
85b4aa49 RL |
1817 | static void fcoe_dev_cleanup(void) |
1818 | { | |
1819 | unregister_netdevice_notifier(&fcoe_notifier); | |
1820 | } | |
1821 | ||
1822 | /** | |
1875f27e RL |
1823 | * fcoe_device_notification() - Handler for net device events |
1824 | * @notifier: The context of the notification | |
1825 | * @event: The type of event | |
1826 | * @ptr: The net device that the event was on | |
85b4aa49 | 1827 | * |
1875f27e | 1828 | * This function is called by the Ethernet driver in case of link change event. |
85b4aa49 RL |
1829 | * |
1830 | * Returns: 0 for success | |
34f42a07 | 1831 | */ |
85b4aa49 RL |
1832 | static int fcoe_device_notification(struct notifier_block *notifier, |
1833 | ulong event, void *ptr) | |
1834 | { | |
1875f27e | 1835 | struct fc_lport *lport = NULL; |
1d1b88dc | 1836 | struct net_device *netdev = ptr; |
014f5c3f | 1837 | struct fcoe_interface *fcoe; |
2e70e241 | 1838 | struct fcoe_port *port; |
85b4aa49 | 1839 | struct fcoe_dev_stats *stats; |
97c8389d | 1840 | u32 link_possible = 1; |
85b4aa49 RL |
1841 | u32 mfs; |
1842 | int rc = NOTIFY_OK; | |
1843 | ||
014f5c3f | 1844 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
25024989 | 1845 | if (fcoe->netdev == netdev) { |
1875f27e | 1846 | lport = fcoe->ctlr.lp; |
85b4aa49 RL |
1847 | break; |
1848 | } | |
1849 | } | |
1875f27e | 1850 | if (!lport) { |
85b4aa49 RL |
1851 | rc = NOTIFY_DONE; |
1852 | goto out; | |
1853 | } | |
1854 | ||
85b4aa49 RL |
1855 | switch (event) { |
1856 | case NETDEV_DOWN: | |
1857 | case NETDEV_GOING_DOWN: | |
97c8389d | 1858 | link_possible = 0; |
85b4aa49 RL |
1859 | break; |
1860 | case NETDEV_UP: | |
1861 | case NETDEV_CHANGE: | |
85b4aa49 RL |
1862 | break; |
1863 | case NETDEV_CHANGEMTU: | |
7221d7e5 YZ |
1864 | if (netdev->features & NETIF_F_FCOE_MTU) |
1865 | break; | |
1d1b88dc VD |
1866 | mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + |
1867 | sizeof(struct fcoe_crc_eof)); | |
85b4aa49 | 1868 | if (mfs >= FC_MIN_MAX_FRAME) |
1875f27e | 1869 | fc_set_mfs(lport, mfs); |
85b4aa49 RL |
1870 | break; |
1871 | case NETDEV_REGISTER: | |
1872 | break; | |
2e70e241 CL |
1873 | case NETDEV_UNREGISTER: |
1874 | list_del(&fcoe->list); | |
1875 | port = lport_priv(fcoe->ctlr.lp); | |
1876 | fcoe_interface_cleanup(fcoe); | |
1877 | schedule_work(&port->destroy_work); | |
1878 | goto out; | |
1879 | break; | |
54a5b21d YZ |
1880 | case NETDEV_FEAT_CHANGE: |
1881 | fcoe_netdev_features_change(lport, netdev); | |
1882 | break; | |
85b4aa49 | 1883 | default: |
1d1b88dc | 1884 | FCOE_NETDEV_DBG(netdev, "Unknown event %ld " |
d5488eb9 | 1885 | "from netdev netlink\n", event); |
85b4aa49 | 1886 | } |
5e4f8fe7 RL |
1887 | |
1888 | fcoe_link_speed_update(lport); | |
1889 | ||
1875f27e | 1890 | if (link_possible && !fcoe_link_ok(lport)) |
3fe9a0ba CL |
1891 | fcoe_ctlr_link_up(&fcoe->ctlr); |
1892 | else if (fcoe_ctlr_link_down(&fcoe->ctlr)) { | |
f018b73a | 1893 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); |
97c8389d | 1894 | stats->LinkFailureCount++; |
f018b73a | 1895 | put_cpu(); |
1875f27e | 1896 | fcoe_clean_pending_queue(lport); |
85b4aa49 RL |
1897 | } |
1898 | out: | |
1899 | return rc; | |
1900 | } | |
1901 | ||
1902 | /** | |
1875f27e RL |
1903 | * fcoe_if_to_netdev() - Parse a name buffer to get a net device |
1904 | * @buffer: The name of the net device | |
85b4aa49 | 1905 | * |
1875f27e | 1906 | * Returns: NULL or a ptr to net_device |
34f42a07 | 1907 | */ |
85b4aa49 RL |
1908 | static struct net_device *fcoe_if_to_netdev(const char *buffer) |
1909 | { | |
1910 | char *cp; | |
1911 | char ifname[IFNAMSIZ + 2]; | |
1912 | ||
1913 | if (buffer) { | |
1914 | strlcpy(ifname, buffer, IFNAMSIZ); | |
1915 | cp = ifname + strlen(ifname); | |
1916 | while (--cp >= ifname && *cp == '\n') | |
1917 | *cp = '\0'; | |
1918 | return dev_get_by_name(&init_net, ifname); | |
1919 | } | |
1920 | return NULL; | |
1921 | } | |
1922 | ||
55a66d3c VD |
1923 | /** |
1924 | * fcoe_disable() - Disables a FCoE interface | |
1925 | * @buffer: The name of the Ethernet interface to be disabled | |
1926 | * @kp: The associated kernel parameter | |
1927 | * | |
1928 | * Called from sysfs. | |
1929 | * | |
1930 | * Returns: 0 for success | |
1931 | */ | |
1932 | static int fcoe_disable(const char *buffer, struct kernel_param *kp) | |
1933 | { | |
1934 | struct fcoe_interface *fcoe; | |
1935 | struct net_device *netdev; | |
1936 | int rc = 0; | |
1937 | ||
1938 | mutex_lock(&fcoe_config_mutex); | |
1939 | #ifdef CONFIG_FCOE_MODULE | |
1940 | /* | |
1941 | * Make sure the module has been initialized, and is not about to be | |
1942 | * removed. Module paramter sysfs files are writable before the | |
1943 | * module_init function is called and after module_exit. | |
1944 | */ | |
1945 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
1946 | rc = -ENODEV; | |
1947 | goto out_nodev; | |
1948 | } | |
1949 | #endif | |
1950 | ||
1951 | netdev = fcoe_if_to_netdev(buffer); | |
1952 | if (!netdev) { | |
1953 | rc = -ENODEV; | |
1954 | goto out_nodev; | |
1955 | } | |
1956 | ||
34ce27bc VD |
1957 | if (!rtnl_trylock()) { |
1958 | dev_put(netdev); | |
1959 | mutex_unlock(&fcoe_config_mutex); | |
1960 | return restart_syscall(); | |
1961 | } | |
1962 | ||
55a66d3c VD |
1963 | fcoe = fcoe_hostlist_lookup_port(netdev); |
1964 | rtnl_unlock(); | |
1965 | ||
9ee50e48 | 1966 | if (fcoe) { |
9ee50e48 | 1967 | fcoe_ctlr_link_down(&fcoe->ctlr); |
9d4cbc05 | 1968 | fcoe_clean_pending_queue(fcoe->ctlr.lp); |
9ee50e48 | 1969 | } else |
55a66d3c VD |
1970 | rc = -ENODEV; |
1971 | ||
1972 | dev_put(netdev); | |
1973 | out_nodev: | |
1974 | mutex_unlock(&fcoe_config_mutex); | |
1975 | return rc; | |
1976 | } | |
1977 | ||
1978 | /** | |
1979 | * fcoe_enable() - Enables a FCoE interface | |
1980 | * @buffer: The name of the Ethernet interface to be enabled | |
1981 | * @kp: The associated kernel parameter | |
1982 | * | |
1983 | * Called from sysfs. | |
1984 | * | |
1985 | * Returns: 0 for success | |
1986 | */ | |
1987 | static int fcoe_enable(const char *buffer, struct kernel_param *kp) | |
1988 | { | |
1989 | struct fcoe_interface *fcoe; | |
1990 | struct net_device *netdev; | |
1991 | int rc = 0; | |
1992 | ||
1993 | mutex_lock(&fcoe_config_mutex); | |
1994 | #ifdef CONFIG_FCOE_MODULE | |
1995 | /* | |
1996 | * Make sure the module has been initialized, and is not about to be | |
1997 | * removed. Module paramter sysfs files are writable before the | |
1998 | * module_init function is called and after module_exit. | |
1999 | */ | |
2000 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
2001 | rc = -ENODEV; | |
2002 | goto out_nodev; | |
2003 | } | |
2004 | #endif | |
2005 | ||
2006 | netdev = fcoe_if_to_netdev(buffer); | |
2007 | if (!netdev) { | |
2008 | rc = -ENODEV; | |
2009 | goto out_nodev; | |
2010 | } | |
2011 | ||
34ce27bc VD |
2012 | if (!rtnl_trylock()) { |
2013 | dev_put(netdev); | |
2014 | mutex_unlock(&fcoe_config_mutex); | |
2015 | return restart_syscall(); | |
2016 | } | |
2017 | ||
55a66d3c VD |
2018 | fcoe = fcoe_hostlist_lookup_port(netdev); |
2019 | rtnl_unlock(); | |
2020 | ||
9d4cbc05 | 2021 | if (!fcoe) |
55a66d3c | 2022 | rc = -ENODEV; |
9d4cbc05 VD |
2023 | else if (!fcoe_link_ok(fcoe->ctlr.lp)) |
2024 | fcoe_ctlr_link_up(&fcoe->ctlr); | |
55a66d3c VD |
2025 | |
2026 | dev_put(netdev); | |
2027 | out_nodev: | |
2028 | mutex_unlock(&fcoe_config_mutex); | |
2029 | return rc; | |
2030 | } | |
2031 | ||
85b4aa49 | 2032 | /** |
1875f27e RL |
2033 | * fcoe_destroy() - Destroy a FCoE interface |
2034 | * @buffer: The name of the Ethernet interface to be destroyed | |
2035 | * @kp: The associated kernel parameter | |
2036 | * | |
2037 | * Called from sysfs. | |
85b4aa49 RL |
2038 | * |
2039 | * Returns: 0 for success | |
34f42a07 | 2040 | */ |
85b4aa49 RL |
2041 | static int fcoe_destroy(const char *buffer, struct kernel_param *kp) |
2042 | { | |
030f4e00 | 2043 | struct fcoe_interface *fcoe; |
2e70e241 | 2044 | struct net_device *netdev; |
8eca355f | 2045 | int rc = 0; |
85b4aa49 | 2046 | |
dfc1d0fe CL |
2047 | mutex_lock(&fcoe_config_mutex); |
2048 | #ifdef CONFIG_FCOE_MODULE | |
2049 | /* | |
2050 | * Make sure the module has been initialized, and is not about to be | |
2051 | * removed. Module paramter sysfs files are writable before the | |
2052 | * module_init function is called and after module_exit. | |
2053 | */ | |
2054 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
2055 | rc = -ENODEV; | |
2056 | goto out_nodev; | |
2057 | } | |
2058 | #endif | |
2059 | ||
85b4aa49 RL |
2060 | netdev = fcoe_if_to_netdev(buffer); |
2061 | if (!netdev) { | |
2062 | rc = -ENODEV; | |
2063 | goto out_nodev; | |
2064 | } | |
2e70e241 | 2065 | |
34ce27bc VD |
2066 | if (!rtnl_trylock()) { |
2067 | dev_put(netdev); | |
2068 | mutex_unlock(&fcoe_config_mutex); | |
2069 | return restart_syscall(); | |
2070 | } | |
2071 | ||
2e70e241 CL |
2072 | fcoe = fcoe_hostlist_lookup_port(netdev); |
2073 | if (!fcoe) { | |
090eb6c4 | 2074 | rtnl_unlock(); |
85b4aa49 RL |
2075 | rc = -ENODEV; |
2076 | goto out_putdev; | |
2077 | } | |
2e70e241 | 2078 | fcoe_interface_cleanup(fcoe); |
54a5b21d | 2079 | list_del(&fcoe->list); |
34ce27bc | 2080 | /* RTNL mutex is dropped by fcoe_if_destroy */ |
2e70e241 | 2081 | fcoe_if_destroy(fcoe->ctlr.lp); |
6409ea65 | 2082 | |
85b4aa49 RL |
2083 | out_putdev: |
2084 | dev_put(netdev); | |
2085 | out_nodev: | |
dfc1d0fe | 2086 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 RL |
2087 | return rc; |
2088 | } | |
2089 | ||
1875f27e RL |
2090 | /** |
2091 | * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context | |
2092 | * @work: Handle to the FCoE port to be destroyed | |
2093 | */ | |
2e70e241 CL |
2094 | static void fcoe_destroy_work(struct work_struct *work) |
2095 | { | |
2096 | struct fcoe_port *port; | |
2097 | ||
2098 | port = container_of(work, struct fcoe_port, destroy_work); | |
2099 | mutex_lock(&fcoe_config_mutex); | |
34ce27bc VD |
2100 | rtnl_lock(); |
2101 | /* RTNL mutex is dropped by fcoe_if_destroy */ | |
2e70e241 CL |
2102 | fcoe_if_destroy(port->lport); |
2103 | mutex_unlock(&fcoe_config_mutex); | |
2104 | } | |
2105 | ||
85b4aa49 | 2106 | /** |
1875f27e RL |
2107 | * fcoe_create() - Create a fcoe interface |
2108 | * @buffer: The name of the Ethernet interface to create on | |
2109 | * @kp: The associated kernel param | |
2110 | * | |
2111 | * Called from sysfs. | |
85b4aa49 RL |
2112 | * |
2113 | * Returns: 0 for success | |
34f42a07 | 2114 | */ |
85b4aa49 RL |
2115 | static int fcoe_create(const char *buffer, struct kernel_param *kp) |
2116 | { | |
1dd454d9 | 2117 | enum fip_state fip_mode = (enum fip_state)(long)kp->arg; |
85b4aa49 | 2118 | int rc; |
030f4e00 | 2119 | struct fcoe_interface *fcoe; |
af7f85d9 | 2120 | struct fc_lport *lport; |
85b4aa49 RL |
2121 | struct net_device *netdev; |
2122 | ||
dfc1d0fe | 2123 | mutex_lock(&fcoe_config_mutex); |
34ce27bc VD |
2124 | |
2125 | if (!rtnl_trylock()) { | |
2126 | mutex_unlock(&fcoe_config_mutex); | |
2127 | return restart_syscall(); | |
2128 | } | |
2129 | ||
dfc1d0fe CL |
2130 | #ifdef CONFIG_FCOE_MODULE |
2131 | /* | |
2132 | * Make sure the module has been initialized, and is not about to be | |
2133 | * removed. Module paramter sysfs files are writable before the | |
2134 | * module_init function is called and after module_exit. | |
2135 | */ | |
2136 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
2137 | rc = -ENODEV; | |
721cafaf | 2138 | goto out_nomod; |
dfc1d0fe CL |
2139 | } |
2140 | #endif | |
2141 | ||
6409ea65 RL |
2142 | if (!try_module_get(THIS_MODULE)) { |
2143 | rc = -EINVAL; | |
2144 | goto out_nomod; | |
2145 | } | |
2146 | ||
85b4aa49 RL |
2147 | netdev = fcoe_if_to_netdev(buffer); |
2148 | if (!netdev) { | |
2149 | rc = -ENODEV; | |
2150 | goto out_nodev; | |
2151 | } | |
2e70e241 | 2152 | |
85b4aa49 RL |
2153 | /* look for existing lport */ |
2154 | if (fcoe_hostlist_lookup(netdev)) { | |
2155 | rc = -EEXIST; | |
2156 | goto out_putdev; | |
2157 | } | |
85b4aa49 | 2158 | |
1dd454d9 | 2159 | fcoe = fcoe_interface_create(netdev, fip_mode); |
030f4e00 CL |
2160 | if (!fcoe) { |
2161 | rc = -ENOMEM; | |
2162 | goto out_putdev; | |
2163 | } | |
2164 | ||
9a05753b | 2165 | lport = fcoe_if_create(fcoe, &netdev->dev, 0); |
af7f85d9 | 2166 | if (IS_ERR(lport)) { |
d5488eb9 | 2167 | printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", |
85b4aa49 | 2168 | netdev->name); |
85b4aa49 | 2169 | rc = -EIO; |
2e70e241 | 2170 | fcoe_interface_cleanup(fcoe); |
030f4e00 | 2171 | goto out_free; |
85b4aa49 | 2172 | } |
030f4e00 | 2173 | |
54b649f8 CL |
2174 | /* Make this the "master" N_Port */ |
2175 | fcoe->ctlr.lp = lport; | |
2176 | ||
c863df33 CL |
2177 | /* add to lports list */ |
2178 | fcoe_hostlist_add(lport); | |
2179 | ||
54b649f8 CL |
2180 | /* start FIP Discovery and FLOGI */ |
2181 | lport->boot_time = jiffies; | |
2182 | fc_fabric_login(lport); | |
2183 | if (!fcoe_link_ok(lport)) | |
2184 | fcoe_ctlr_link_up(&fcoe->ctlr); | |
030f4e00 | 2185 | |
54b649f8 CL |
2186 | /* |
2187 | * Release from init in fcoe_interface_create(), on success lport | |
2188 | * should be holding a reference taken in fcoe_if_create(). | |
2189 | */ | |
030f4e00 | 2190 | fcoe_interface_put(fcoe); |
6409ea65 RL |
2191 | dev_put(netdev); |
2192 | rtnl_unlock(); | |
2193 | mutex_unlock(&fcoe_config_mutex); | |
2194 | ||
2195 | return 0; | |
2196 | out_free: | |
2197 | fcoe_interface_put(fcoe); | |
85b4aa49 RL |
2198 | out_putdev: |
2199 | dev_put(netdev); | |
2200 | out_nodev: | |
6409ea65 RL |
2201 | module_put(THIS_MODULE); |
2202 | out_nomod: | |
34ce27bc | 2203 | rtnl_unlock(); |
dfc1d0fe | 2204 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 RL |
2205 | return rc; |
2206 | } | |
2207 | ||
34f42a07 | 2208 | /** |
5e4f8fe7 RL |
2209 | * fcoe_link_speed_update() - Update the supported and actual link speeds |
2210 | * @lport: The local port to update speeds for | |
85b4aa49 | 2211 | * |
5e4f8fe7 RL |
2212 | * Returns: 0 if the ethtool query was successful |
2213 | * -1 if the ethtool query failed | |
85b4aa49 | 2214 | */ |
5e4f8fe7 | 2215 | int fcoe_link_speed_update(struct fc_lport *lport) |
85b4aa49 | 2216 | { |
1875f27e RL |
2217 | struct fcoe_port *port = lport_priv(lport); |
2218 | struct net_device *netdev = port->fcoe->netdev; | |
85b4aa49 | 2219 | struct ethtool_cmd ecmd = { ETHTOOL_GSET }; |
85b4aa49 | 2220 | |
5e4f8fe7 | 2221 | if (!dev_ethtool_get_settings(netdev, &ecmd)) { |
1875f27e | 2222 | lport->link_supported_speeds &= |
2f718d64 YZ |
2223 | ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT); |
2224 | if (ecmd.supported & (SUPPORTED_1000baseT_Half | | |
2225 | SUPPORTED_1000baseT_Full)) | |
1875f27e | 2226 | lport->link_supported_speeds |= FC_PORTSPEED_1GBIT; |
2f718d64 | 2227 | if (ecmd.supported & SUPPORTED_10000baseT_Full) |
1875f27e | 2228 | lport->link_supported_speeds |= |
2f718d64 YZ |
2229 | FC_PORTSPEED_10GBIT; |
2230 | if (ecmd.speed == SPEED_1000) | |
1875f27e | 2231 | lport->link_speed = FC_PORTSPEED_1GBIT; |
2f718d64 | 2232 | if (ecmd.speed == SPEED_10000) |
1875f27e | 2233 | lport->link_speed = FC_PORTSPEED_10GBIT; |
85b4aa49 | 2234 | |
2f718d64 YZ |
2235 | return 0; |
2236 | } | |
2237 | return -1; | |
85b4aa49 | 2238 | } |
85b4aa49 | 2239 | |
5e4f8fe7 RL |
2240 | /** |
2241 | * fcoe_link_ok() - Check if the link is OK for a local port | |
2242 | * @lport: The local port to check link on | |
2243 | * | |
2244 | * Returns: 0 if link is UP and OK, -1 if not | |
2245 | * | |
2246 | */ | |
2247 | int fcoe_link_ok(struct fc_lport *lport) | |
2248 | { | |
2249 | struct fcoe_port *port = lport_priv(lport); | |
2250 | struct net_device *netdev = port->fcoe->netdev; | |
2251 | ||
2252 | if (netif_oper_up(netdev)) | |
2253 | return 0; | |
2254 | return -1; | |
2255 | } | |
2256 | ||
34f42a07 | 2257 | /** |
1875f27e RL |
2258 | * fcoe_percpu_clean() - Clear all pending skbs for an local port |
2259 | * @lport: The local port whose skbs are to be cleared | |
e7a51997 JE |
2260 | * |
2261 | * Must be called with fcoe_create_mutex held to single-thread completion. | |
2262 | * | |
2263 | * This flushes the pending skbs by adding a new skb to each queue and | |
2264 | * waiting until they are all freed. This assures us that not only are | |
2265 | * there no packets that will be handled by the lport, but also that any | |
2266 | * threads already handling packet have returned. | |
85b4aa49 | 2267 | */ |
1875f27e | 2268 | void fcoe_percpu_clean(struct fc_lport *lport) |
85b4aa49 | 2269 | { |
85b4aa49 RL |
2270 | struct fcoe_percpu_s *pp; |
2271 | struct fcoe_rcv_info *fr; | |
2272 | struct sk_buff_head *list; | |
2273 | struct sk_buff *skb, *next; | |
2274 | struct sk_buff *head; | |
5e5e92df | 2275 | unsigned int cpu; |
85b4aa49 | 2276 | |
5e5e92df RL |
2277 | for_each_possible_cpu(cpu) { |
2278 | pp = &per_cpu(fcoe_percpu, cpu); | |
2279 | spin_lock_bh(&pp->fcoe_rx_list.lock); | |
2280 | list = &pp->fcoe_rx_list; | |
2281 | head = list->next; | |
2282 | for (skb = head; skb != (struct sk_buff *)list; | |
2283 | skb = next) { | |
2284 | next = skb->next; | |
2285 | fr = fcoe_dev_from_skb(skb); | |
1875f27e | 2286 | if (fr->fr_dev == lport) { |
5e5e92df RL |
2287 | __skb_unlink(skb, list); |
2288 | kfree_skb(skb); | |
85b4aa49 | 2289 | } |
85b4aa49 | 2290 | } |
e7a51997 JE |
2291 | |
2292 | if (!pp->thread || !cpu_online(cpu)) { | |
2293 | spin_unlock_bh(&pp->fcoe_rx_list.lock); | |
2294 | continue; | |
2295 | } | |
2296 | ||
2297 | skb = dev_alloc_skb(0); | |
2298 | if (!skb) { | |
2299 | spin_unlock_bh(&pp->fcoe_rx_list.lock); | |
2300 | continue; | |
2301 | } | |
2302 | skb->destructor = fcoe_percpu_flush_done; | |
2303 | ||
2304 | __skb_queue_tail(&pp->fcoe_rx_list, skb); | |
2305 | if (pp->fcoe_rx_list.qlen == 1) | |
2306 | wake_up_process(pp->thread); | |
5e5e92df | 2307 | spin_unlock_bh(&pp->fcoe_rx_list.lock); |
e7a51997 JE |
2308 | |
2309 | wait_for_completion(&fcoe_flush_completion); | |
85b4aa49 RL |
2310 | } |
2311 | } | |
85b4aa49 RL |
2312 | |
2313 | /** | |
34f42a07 | 2314 | * fcoe_clean_pending_queue() - Dequeue a skb and free it |
1875f27e | 2315 | * @lport: The local port to dequeue a skb on |
34f42a07 | 2316 | */ |
1875f27e | 2317 | void fcoe_clean_pending_queue(struct fc_lport *lport) |
85b4aa49 | 2318 | { |
1875f27e | 2319 | struct fcoe_port *port = lport_priv(lport); |
85b4aa49 RL |
2320 | struct sk_buff *skb; |
2321 | ||
014f5c3f CL |
2322 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
2323 | while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) { | |
2324 | spin_unlock_bh(&port->fcoe_pending_queue.lock); | |
85b4aa49 | 2325 | kfree_skb(skb); |
014f5c3f | 2326 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
85b4aa49 | 2327 | } |
014f5c3f | 2328 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
85b4aa49 | 2329 | } |
85b4aa49 | 2330 | |
34f42a07 | 2331 | /** |
1875f27e RL |
2332 | * fcoe_reset() - Reset a local port |
2333 | * @shost: The SCSI host associated with the local port to be reset | |
85b4aa49 | 2334 | * |
1875f27e | 2335 | * Returns: Always 0 (return value required by FC transport template) |
85b4aa49 RL |
2336 | */ |
2337 | int fcoe_reset(struct Scsi_Host *shost) | |
2338 | { | |
2339 | struct fc_lport *lport = shost_priv(shost); | |
2340 | fc_lport_reset(lport); | |
2341 | return 0; | |
2342 | } | |
85b4aa49 | 2343 | |
34f42a07 | 2344 | /** |
1875f27e RL |
2345 | * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device |
2346 | * @netdev: The net device used as a key | |
85b4aa49 | 2347 | * |
1875f27e RL |
2348 | * Locking: Must be called with the RNL mutex held. |
2349 | * | |
2350 | * Returns: NULL or the FCoE interface | |
85b4aa49 | 2351 | */ |
014f5c3f | 2352 | static struct fcoe_interface * |
1875f27e | 2353 | fcoe_hostlist_lookup_port(const struct net_device *netdev) |
85b4aa49 | 2354 | { |
014f5c3f | 2355 | struct fcoe_interface *fcoe; |
85b4aa49 | 2356 | |
014f5c3f | 2357 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
1875f27e | 2358 | if (fcoe->netdev == netdev) |
014f5c3f | 2359 | return fcoe; |
85b4aa49 | 2360 | } |
85b4aa49 RL |
2361 | return NULL; |
2362 | } | |
2363 | ||
34f42a07 | 2364 | /** |
1875f27e RL |
2365 | * fcoe_hostlist_lookup() - Find the local port associated with a |
2366 | * given net device | |
2367 | * @netdev: The netdevice used as a key | |
85b4aa49 | 2368 | * |
1875f27e RL |
2369 | * Locking: Must be called with the RTNL mutex held |
2370 | * | |
2371 | * Returns: NULL or the local port | |
85b4aa49 | 2372 | */ |
090eb6c4 | 2373 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) |
85b4aa49 | 2374 | { |
014f5c3f | 2375 | struct fcoe_interface *fcoe; |
85b4aa49 | 2376 | |
014f5c3f | 2377 | fcoe = fcoe_hostlist_lookup_port(netdev); |
3fe9a0ba | 2378 | return (fcoe) ? fcoe->ctlr.lp : NULL; |
85b4aa49 | 2379 | } |
85b4aa49 | 2380 | |
34f42a07 | 2381 | /** |
1875f27e RL |
2382 | * fcoe_hostlist_add() - Add the FCoE interface identified by a local |
2383 | * port to the hostlist | |
2384 | * @lport: The local port that identifies the FCoE interface to be added | |
85b4aa49 | 2385 | * |
090eb6c4 | 2386 | * Locking: must be called with the RTNL mutex held |
1875f27e RL |
2387 | * |
2388 | * Returns: 0 for success | |
85b4aa49 | 2389 | */ |
090eb6c4 | 2390 | static int fcoe_hostlist_add(const struct fc_lport *lport) |
85b4aa49 | 2391 | { |
014f5c3f CL |
2392 | struct fcoe_interface *fcoe; |
2393 | struct fcoe_port *port; | |
2394 | ||
2395 | fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); | |
2396 | if (!fcoe) { | |
2397 | port = lport_priv(lport); | |
2398 | fcoe = port->fcoe; | |
2399 | list_add_tail(&fcoe->list, &fcoe_hostlist); | |
85b4aa49 RL |
2400 | } |
2401 | return 0; | |
2402 | } | |
85b4aa49 | 2403 | |
85b4aa49 | 2404 | /** |
1875f27e | 2405 | * fcoe_init() - Initialize fcoe.ko |
85b4aa49 | 2406 | * |
1875f27e | 2407 | * Returns: 0 on success, or a negative value on failure |
34f42a07 | 2408 | */ |
85b4aa49 RL |
2409 | static int __init fcoe_init(void) |
2410 | { | |
1875f27e | 2411 | struct fcoe_percpu_s *p; |
38eccabd | 2412 | unsigned int cpu; |
8976f424 | 2413 | int rc = 0; |
85b4aa49 | 2414 | |
dfc1d0fe CL |
2415 | mutex_lock(&fcoe_config_mutex); |
2416 | ||
38eccabd | 2417 | for_each_possible_cpu(cpu) { |
5e5e92df | 2418 | p = &per_cpu(fcoe_percpu, cpu); |
38eccabd RL |
2419 | skb_queue_head_init(&p->fcoe_rx_list); |
2420 | } | |
2421 | ||
8976f424 RL |
2422 | for_each_online_cpu(cpu) |
2423 | fcoe_percpu_thread_create(cpu); | |
85b4aa49 | 2424 | |
8976f424 RL |
2425 | /* Initialize per CPU interrupt thread */ |
2426 | rc = register_hotcpu_notifier(&fcoe_cpu_notifier); | |
2427 | if (rc) | |
2428 | goto out_free; | |
85b4aa49 | 2429 | |
8976f424 | 2430 | /* Setup link change notification */ |
85b4aa49 RL |
2431 | fcoe_dev_setup(); |
2432 | ||
5892c32f CL |
2433 | rc = fcoe_if_init(); |
2434 | if (rc) | |
2435 | goto out_free; | |
85b4aa49 | 2436 | |
dfc1d0fe | 2437 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 | 2438 | return 0; |
8976f424 RL |
2439 | |
2440 | out_free: | |
2441 | for_each_online_cpu(cpu) { | |
2442 | fcoe_percpu_thread_destroy(cpu); | |
2443 | } | |
dfc1d0fe | 2444 | mutex_unlock(&fcoe_config_mutex); |
8976f424 | 2445 | return rc; |
85b4aa49 RL |
2446 | } |
2447 | module_init(fcoe_init); | |
2448 | ||
2449 | /** | |
1875f27e | 2450 | * fcoe_exit() - Clean up fcoe.ko |
85b4aa49 | 2451 | * |
1875f27e | 2452 | * Returns: 0 on success or a negative value on failure |
34f42a07 | 2453 | */ |
85b4aa49 RL |
2454 | static void __exit fcoe_exit(void) |
2455 | { | |
014f5c3f | 2456 | struct fcoe_interface *fcoe, *tmp; |
2e70e241 | 2457 | struct fcoe_port *port; |
1875f27e | 2458 | unsigned int cpu; |
85b4aa49 | 2459 | |
dfc1d0fe CL |
2460 | mutex_lock(&fcoe_config_mutex); |
2461 | ||
85b4aa49 RL |
2462 | fcoe_dev_cleanup(); |
2463 | ||
5919a595 | 2464 | /* releases the associated fcoe hosts */ |
090eb6c4 CL |
2465 | rtnl_lock(); |
2466 | list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { | |
c863df33 | 2467 | list_del(&fcoe->list); |
2e70e241 | 2468 | port = lport_priv(fcoe->ctlr.lp); |
2e70e241 | 2469 | fcoe_interface_cleanup(fcoe); |
2e70e241 | 2470 | schedule_work(&port->destroy_work); |
c863df33 | 2471 | } |
090eb6c4 | 2472 | rtnl_unlock(); |
85b4aa49 | 2473 | |
8976f424 RL |
2474 | unregister_hotcpu_notifier(&fcoe_cpu_notifier); |
2475 | ||
014f5c3f | 2476 | for_each_online_cpu(cpu) |
8976f424 | 2477 | fcoe_percpu_thread_destroy(cpu); |
85b4aa49 | 2478 | |
dfc1d0fe | 2479 | mutex_unlock(&fcoe_config_mutex); |
2e70e241 CL |
2480 | |
2481 | /* flush any asyncronous interface destroys, | |
2482 | * this should happen after the netdev notifier is unregistered */ | |
2483 | flush_scheduled_work(); | |
9a05753b CL |
2484 | /* That will flush out all the N_Ports on the hostlist, but now we |
2485 | * may have NPIV VN_Ports scheduled for destruction */ | |
2486 | flush_scheduled_work(); | |
2e70e241 CL |
2487 | |
2488 | /* detach from scsi transport | |
2489 | * must happen after all destroys are done, therefor after the flush */ | |
2490 | fcoe_if_exit(); | |
85b4aa49 RL |
2491 | } |
2492 | module_exit(fcoe_exit); | |
11b56188 CL |
2493 | |
2494 | /** | |
2495 | * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler | |
2496 | * @seq: active sequence in the FLOGI or FDISC exchange | |
2497 | * @fp: response frame, or error encoded in a pointer (timeout) | |
2498 | * @arg: pointer the the fcoe_ctlr structure | |
2499 | * | |
65155b37 | 2500 | * This handles MAC address management for FCoE, then passes control on to |
11b56188 CL |
2501 | * the libfc FLOGI response handler. |
2502 | */ | |
2503 | static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) | |
2504 | { | |
2505 | struct fcoe_ctlr *fip = arg; | |
2506 | struct fc_exch *exch = fc_seq_exch(seq); | |
2507 | struct fc_lport *lport = exch->lp; | |
2508 | u8 *mac; | |
2509 | ||
2510 | if (IS_ERR(fp)) | |
2511 | goto done; | |
2512 | ||
2513 | mac = fr_cb(fp)->granted_mac; | |
2514 | if (is_zero_ether_addr(mac)) { | |
2515 | /* pre-FIP */ | |
386309ce | 2516 | if (fcoe_ctlr_recv_flogi(fip, lport, fp)) { |
11b56188 CL |
2517 | fc_frame_free(fp); |
2518 | return; | |
2519 | } | |
11b56188 | 2520 | } |
386309ce | 2521 | fcoe_update_src_mac(lport, mac); |
11b56188 CL |
2522 | done: |
2523 | fc_lport_flogi_resp(seq, fp, lport); | |
2524 | } | |
2525 | ||
2526 | /** | |
2527 | * fcoe_logo_resp() - FCoE specific LOGO response handler | |
2528 | * @seq: active sequence in the LOGO exchange | |
2529 | * @fp: response frame, or error encoded in a pointer (timeout) | |
2530 | * @arg: pointer the the fcoe_ctlr structure | |
2531 | * | |
65155b37 | 2532 | * This handles MAC address management for FCoE, then passes control on to |
11b56188 CL |
2533 | * the libfc LOGO response handler. |
2534 | */ | |
2535 | static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) | |
2536 | { | |
386309ce | 2537 | struct fc_lport *lport = arg; |
11b56188 CL |
2538 | static u8 zero_mac[ETH_ALEN] = { 0 }; |
2539 | ||
2540 | if (!IS_ERR(fp)) | |
386309ce | 2541 | fcoe_update_src_mac(lport, zero_mac); |
11b56188 CL |
2542 | fc_lport_logo_resp(seq, fp, lport); |
2543 | } | |
2544 | ||
2545 | /** | |
2546 | * fcoe_elsct_send - FCoE specific ELS handler | |
2547 | * | |
2548 | * This does special case handling of FIP encapsualted ELS exchanges for FCoE, | |
2549 | * using FCoE specific response handlers and passing the FIP controller as | |
2550 | * the argument (the lport is still available from the exchange). | |
2551 | * | |
2552 | * Most of the work here is just handed off to the libfc routine. | |
2553 | */ | |
1875f27e RL |
2554 | static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, |
2555 | struct fc_frame *fp, unsigned int op, | |
2556 | void (*resp)(struct fc_seq *, | |
2557 | struct fc_frame *, | |
2558 | void *), | |
2559 | void *arg, u32 timeout) | |
11b56188 CL |
2560 | { |
2561 | struct fcoe_port *port = lport_priv(lport); | |
2562 | struct fcoe_interface *fcoe = port->fcoe; | |
2563 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
2564 | struct fc_frame_header *fh = fc_frame_header_get(fp); | |
2565 | ||
2566 | switch (op) { | |
2567 | case ELS_FLOGI: | |
2568 | case ELS_FDISC: | |
e10f8c66 JE |
2569 | if (lport->point_to_multipoint) |
2570 | break; | |
11b56188 CL |
2571 | return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, |
2572 | fip, timeout); | |
2573 | case ELS_LOGO: | |
2574 | /* only hook onto fabric logouts, not port logouts */ | |
2575 | if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) | |
2576 | break; | |
2577 | return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, | |
386309ce | 2578 | lport, timeout); |
11b56188 CL |
2579 | } |
2580 | return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); | |
2581 | } | |
2582 | ||
9a05753b CL |
2583 | /** |
2584 | * fcoe_vport_create() - create an fc_host/scsi_host for a vport | |
2585 | * @vport: fc_vport object to create a new fc_host for | |
2586 | * @disabled: start the new fc_host in a disabled state by default? | |
2587 | * | |
2588 | * Returns: 0 for success | |
2589 | */ | |
2590 | static int fcoe_vport_create(struct fc_vport *vport, bool disabled) | |
2591 | { | |
2592 | struct Scsi_Host *shost = vport_to_shost(vport); | |
2593 | struct fc_lport *n_port = shost_priv(shost); | |
2594 | struct fcoe_port *port = lport_priv(n_port); | |
2595 | struct fcoe_interface *fcoe = port->fcoe; | |
2596 | struct net_device *netdev = fcoe->netdev; | |
2597 | struct fc_lport *vn_port; | |
2598 | ||
2599 | mutex_lock(&fcoe_config_mutex); | |
2600 | vn_port = fcoe_if_create(fcoe, &vport->dev, 1); | |
2601 | mutex_unlock(&fcoe_config_mutex); | |
2602 | ||
2603 | if (IS_ERR(vn_port)) { | |
2604 | printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", | |
2605 | netdev->name); | |
2606 | return -EIO; | |
2607 | } | |
2608 | ||
2609 | if (disabled) { | |
2610 | fc_vport_set_state(vport, FC_VPORT_DISABLED); | |
2611 | } else { | |
2612 | vn_port->boot_time = jiffies; | |
2613 | fc_fabric_login(vn_port); | |
2614 | fc_vport_setlink(vn_port); | |
2615 | } | |
2616 | return 0; | |
2617 | } | |
2618 | ||
2619 | /** | |
2620 | * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport | |
2621 | * @vport: fc_vport object that is being destroyed | |
2622 | * | |
2623 | * Returns: 0 for success | |
2624 | */ | |
2625 | static int fcoe_vport_destroy(struct fc_vport *vport) | |
2626 | { | |
2627 | struct Scsi_Host *shost = vport_to_shost(vport); | |
2628 | struct fc_lport *n_port = shost_priv(shost); | |
2629 | struct fc_lport *vn_port = vport->dd_data; | |
2630 | struct fcoe_port *port = lport_priv(vn_port); | |
2631 | ||
2632 | mutex_lock(&n_port->lp_mutex); | |
2633 | list_del(&vn_port->list); | |
2634 | mutex_unlock(&n_port->lp_mutex); | |
2635 | schedule_work(&port->destroy_work); | |
2636 | return 0; | |
2637 | } | |
2638 | ||
2639 | /** | |
2640 | * fcoe_vport_disable() - change vport state | |
2641 | * @vport: vport to bring online/offline | |
2642 | * @disable: should the vport be disabled? | |
2643 | */ | |
2644 | static int fcoe_vport_disable(struct fc_vport *vport, bool disable) | |
2645 | { | |
2646 | struct fc_lport *lport = vport->dd_data; | |
2647 | ||
2648 | if (disable) { | |
2649 | fc_vport_set_state(vport, FC_VPORT_DISABLED); | |
2650 | fc_fabric_logoff(lport); | |
2651 | } else { | |
2652 | lport->boot_time = jiffies; | |
2653 | fc_fabric_login(lport); | |
2654 | fc_vport_setlink(lport); | |
2655 | } | |
2656 | ||
2657 | return 0; | |
2658 | } | |
2659 | ||
dc8596d3 CL |
2660 | /** |
2661 | * fcoe_vport_set_symbolic_name() - append vport string to symbolic name | |
2662 | * @vport: fc_vport with a new symbolic name string | |
2663 | * | |
2664 | * After generating a new symbolic name string, a new RSPN_ID request is | |
2665 | * sent to the name server. There is no response handler, so if it fails | |
2666 | * for some reason it will not be retried. | |
2667 | */ | |
2668 | static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) | |
2669 | { | |
2670 | struct fc_lport *lport = vport->dd_data; | |
2671 | struct fc_frame *fp; | |
2672 | size_t len; | |
2673 | ||
2674 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, | |
2675 | "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, | |
2676 | fcoe_netdev(lport)->name, vport->symbolic_name); | |
2677 | ||
2678 | if (lport->state != LPORT_ST_READY) | |
2679 | return; | |
2680 | ||
2681 | len = strnlen(fc_host_symbolic_name(lport->host), 255); | |
2682 | fp = fc_frame_alloc(lport, | |
2683 | sizeof(struct fc_ct_hdr) + | |
2684 | sizeof(struct fc_ns_rspn) + len); | |
2685 | if (!fp) | |
2686 | return; | |
2687 | lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, | |
b94f8951 | 2688 | NULL, NULL, 3 * lport->r_a_tov); |
dc8596d3 | 2689 | } |
b84056bf YZ |
2690 | |
2691 | /** | |
2692 | * fcoe_get_lesb() - Fill the FCoE Link Error Status Block | |
2693 | * @lport: the local port | |
2694 | * @fc_lesb: the link error status block | |
2695 | */ | |
2696 | static void fcoe_get_lesb(struct fc_lport *lport, | |
2697 | struct fc_els_lesb *fc_lesb) | |
2698 | { | |
2699 | unsigned int cpu; | |
2700 | u32 lfc, vlfc, mdac; | |
2701 | struct fcoe_dev_stats *devst; | |
2702 | struct fcoe_fc_els_lesb *lesb; | |
28172739 | 2703 | struct rtnl_link_stats64 temp; |
b84056bf YZ |
2704 | struct net_device *netdev = fcoe_netdev(lport); |
2705 | ||
2706 | lfc = 0; | |
2707 | vlfc = 0; | |
2708 | mdac = 0; | |
2709 | lesb = (struct fcoe_fc_els_lesb *)fc_lesb; | |
2710 | memset(lesb, 0, sizeof(*lesb)); | |
2711 | for_each_possible_cpu(cpu) { | |
2712 | devst = per_cpu_ptr(lport->dev_stats, cpu); | |
2713 | lfc += devst->LinkFailureCount; | |
2714 | vlfc += devst->VLinkFailureCount; | |
2715 | mdac += devst->MissDiscAdvCount; | |
2716 | } | |
2717 | lesb->lesb_link_fail = htonl(lfc); | |
2718 | lesb->lesb_vlink_fail = htonl(vlfc); | |
2719 | lesb->lesb_miss_fka = htonl(mdac); | |
28172739 | 2720 | lesb->lesb_fcs_error = htonl(dev_get_stats(netdev, &temp)->rx_crc_errors); |
b84056bf | 2721 | } |
7d65b0df JE |
2722 | |
2723 | /** | |
2724 | * fcoe_set_port_id() - Callback from libfc when Port_ID is set. | |
2725 | * @lport: the local port | |
2726 | * @port_id: the port ID | |
2727 | * @fp: the received frame, if any, that caused the port_id to be set. | |
2728 | * | |
2729 | * This routine handles the case where we received a FLOGI and are | |
2730 | * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi() | |
2731 | * so it can set the non-mapped mode and gateway address. | |
2732 | * | |
2733 | * The FLOGI LS_ACC is handled by fcoe_flogi_resp(). | |
2734 | */ | |
2735 | static void fcoe_set_port_id(struct fc_lport *lport, | |
2736 | u32 port_id, struct fc_frame *fp) | |
2737 | { | |
2738 | struct fcoe_port *port = lport_priv(lport); | |
2739 | struct fcoe_interface *fcoe = port->fcoe; | |
2740 | ||
2741 | if (fp && fc_frame_payload_op(fp) == ELS_FLOGI) | |
2742 | fcoe_ctlr_recv_flogi(&fcoe->ctlr, lport, fp); | |
2743 | } |