Commit | Line | Data |
---|---|---|
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> | |
2ca32b48 | 34 | #include <linux/workqueue.h> |
85b4aa49 RL |
35 | #include <scsi/scsi_tcq.h> |
36 | #include <scsi/scsicam.h> | |
37 | #include <scsi/scsi_transport.h> | |
38 | #include <scsi/scsi_transport_fc.h> | |
39 | #include <net/rtnetlink.h> | |
40 | ||
41 | #include <scsi/fc/fc_encaps.h> | |
97c8389d | 42 | #include <scsi/fc/fc_fip.h> |
85b4aa49 RL |
43 | |
44 | #include <scsi/libfc.h> | |
45 | #include <scsi/fc_frame.h> | |
46 | #include <scsi/libfcoe.h> | |
85b4aa49 | 47 | |
fdd78027 | 48 | #include "fcoe.h" |
7f349142 | 49 | |
85b4aa49 RL |
50 | MODULE_AUTHOR("Open-FCoE.org"); |
51 | MODULE_DESCRIPTION("FCoE"); | |
9b34ecff | 52 | MODULE_LICENSE("GPL v2"); |
85b4aa49 | 53 | |
05cc7390 YZ |
54 | /* Performance tuning parameters for fcoe */ |
55 | static unsigned int fcoe_ddp_min; | |
56 | module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR); | |
57 | MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \ | |
58 | "Direct Data Placement (DDP)."); | |
59 | ||
dfc1d0fe CL |
60 | DEFINE_MUTEX(fcoe_config_mutex); |
61 | ||
2ca32b48 TH |
62 | static struct workqueue_struct *fcoe_wq; |
63 | ||
e7a51997 JE |
64 | /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */ |
65 | static DECLARE_COMPLETION(fcoe_flush_completion); | |
66 | ||
85b4aa49 | 67 | /* fcoe host list */ |
090eb6c4 | 68 | /* must only by accessed under the RTNL mutex */ |
85b4aa49 | 69 | LIST_HEAD(fcoe_hostlist); |
5e5e92df | 70 | DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu); |
85b4aa49 | 71 | |
dd3fd72e | 72 | /* Function Prototypes */ |
1875f27e | 73 | static int fcoe_reset(struct Scsi_Host *); |
fdd78027 VD |
74 | static int fcoe_xmit(struct fc_lport *, struct fc_frame *); |
75 | static int fcoe_rcv(struct sk_buff *, struct net_device *, | |
76 | struct packet_type *, struct net_device *); | |
1875f27e | 77 | static int fcoe_percpu_receive_thread(void *); |
1875f27e | 78 | static void fcoe_percpu_clean(struct fc_lport *); |
5e4f8fe7 | 79 | static int fcoe_link_speed_update(struct fc_lport *); |
1875f27e | 80 | static int fcoe_link_ok(struct fc_lport *); |
fdd78027 VD |
81 | |
82 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); | |
83 | static int fcoe_hostlist_add(const struct fc_lport *); | |
fdd78027 | 84 | |
85b4aa49 RL |
85 | static int fcoe_device_notification(struct notifier_block *, ulong, void *); |
86 | static void fcoe_dev_setup(void); | |
87 | static void fcoe_dev_cleanup(void); | |
1875f27e RL |
88 | static struct fcoe_interface |
89 | *fcoe_hostlist_lookup_port(const struct net_device *); | |
90 | ||
91 | static int fcoe_fip_recv(struct sk_buff *, struct net_device *, | |
92 | struct packet_type *, struct net_device *); | |
93 | ||
94 | static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *); | |
95 | static void fcoe_update_src_mac(struct fc_lport *, u8 *); | |
96 | static u8 *fcoe_get_src_mac(struct fc_lport *); | |
97 | static void fcoe_destroy_work(struct work_struct *); | |
98 | ||
99 | static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *, | |
100 | unsigned int); | |
101 | static int fcoe_ddp_done(struct fc_lport *, u16); | |
102 | ||
103 | static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *); | |
104 | ||
78a58246 YZ |
105 | static bool fcoe_match(struct net_device *netdev); |
106 | static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode); | |
107 | static int fcoe_destroy(struct net_device *netdev); | |
108 | static int fcoe_enable(struct net_device *netdev); | |
109 | static int fcoe_disable(struct net_device *netdev); | |
1875f27e | 110 | |
1875f27e RL |
111 | static struct fc_seq *fcoe_elsct_send(struct fc_lport *, |
112 | u32 did, struct fc_frame *, | |
113 | unsigned int op, | |
114 | void (*resp)(struct fc_seq *, | |
115 | struct fc_frame *, | |
116 | void *), | |
117 | void *, u32 timeout); | |
859b7b64 | 118 | static void fcoe_recv_frame(struct sk_buff *skb); |
1875f27e | 119 | |
b84056bf YZ |
120 | static void fcoe_get_lesb(struct fc_lport *, struct fc_els_lesb *); |
121 | ||
1875f27e | 122 | /* notification function for packets from net device */ |
85b4aa49 RL |
123 | static struct notifier_block fcoe_notifier = { |
124 | .notifier_call = fcoe_device_notification, | |
125 | }; | |
126 | ||
1875f27e RL |
127 | /* notification function for CPU hotplug events */ |
128 | static struct notifier_block fcoe_cpu_notifier = { | |
129 | .notifier_call = fcoe_cpu_callback, | |
130 | }; | |
131 | ||
8ca86f84 YZ |
132 | static struct scsi_transport_template *fcoe_nport_scsi_transport; |
133 | static struct scsi_transport_template *fcoe_vport_scsi_transport; | |
7f349142 | 134 | |
1875f27e RL |
135 | static int fcoe_vport_destroy(struct fc_vport *); |
136 | static int fcoe_vport_create(struct fc_vport *, bool disabled); | |
137 | static int fcoe_vport_disable(struct fc_vport *, bool disable); | |
138 | static void fcoe_set_vport_symbolic_name(struct fc_vport *); | |
7d65b0df | 139 | static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *); |
1875f27e RL |
140 | |
141 | static struct libfc_function_template fcoe_libfc_fcn_templ = { | |
142 | .frame_send = fcoe_xmit, | |
143 | .ddp_setup = fcoe_ddp_setup, | |
144 | .ddp_done = fcoe_ddp_done, | |
145 | .elsct_send = fcoe_elsct_send, | |
b84056bf | 146 | .get_lesb = fcoe_get_lesb, |
7d65b0df | 147 | .lport_set_port_id = fcoe_set_port_id, |
1875f27e | 148 | }; |
9a05753b | 149 | |
8ca86f84 | 150 | struct fc_function_template fcoe_nport_fc_functions = { |
7f349142 VD |
151 | .show_host_node_name = 1, |
152 | .show_host_port_name = 1, | |
153 | .show_host_supported_classes = 1, | |
154 | .show_host_supported_fc4s = 1, | |
155 | .show_host_active_fc4s = 1, | |
156 | .show_host_maxframe_size = 1, | |
157 | ||
158 | .show_host_port_id = 1, | |
159 | .show_host_supported_speeds = 1, | |
160 | .get_host_speed = fc_get_host_speed, | |
161 | .show_host_speed = 1, | |
162 | .show_host_port_type = 1, | |
163 | .get_host_port_state = fc_get_host_port_state, | |
164 | .show_host_port_state = 1, | |
165 | .show_host_symbolic_name = 1, | |
166 | ||
167 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
168 | .show_rport_maxframe_size = 1, | |
169 | .show_rport_supported_classes = 1, | |
170 | ||
171 | .show_host_fabric_name = 1, | |
172 | .show_starget_node_name = 1, | |
173 | .show_starget_port_name = 1, | |
174 | .show_starget_port_id = 1, | |
175 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
176 | .show_rport_dev_loss_tmo = 1, | |
177 | .get_fc_host_stats = fc_get_host_stats, | |
178 | .issue_fc_host_lip = fcoe_reset, | |
179 | ||
180 | .terminate_rport_io = fc_rport_terminate_io, | |
9a05753b CL |
181 | |
182 | .vport_create = fcoe_vport_create, | |
183 | .vport_delete = fcoe_vport_destroy, | |
184 | .vport_disable = fcoe_vport_disable, | |
dc8596d3 | 185 | .set_vport_symbolic_name = fcoe_set_vport_symbolic_name, |
a51ab396 SM |
186 | |
187 | .bsg_request = fc_lport_bsg_request, | |
7f349142 VD |
188 | }; |
189 | ||
8ca86f84 | 190 | struct fc_function_template fcoe_vport_fc_functions = { |
e9084bb8 CL |
191 | .show_host_node_name = 1, |
192 | .show_host_port_name = 1, | |
193 | .show_host_supported_classes = 1, | |
194 | .show_host_supported_fc4s = 1, | |
195 | .show_host_active_fc4s = 1, | |
196 | .show_host_maxframe_size = 1, | |
197 | ||
198 | .show_host_port_id = 1, | |
199 | .show_host_supported_speeds = 1, | |
200 | .get_host_speed = fc_get_host_speed, | |
201 | .show_host_speed = 1, | |
202 | .show_host_port_type = 1, | |
203 | .get_host_port_state = fc_get_host_port_state, | |
204 | .show_host_port_state = 1, | |
205 | .show_host_symbolic_name = 1, | |
206 | ||
207 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
208 | .show_rport_maxframe_size = 1, | |
209 | .show_rport_supported_classes = 1, | |
210 | ||
211 | .show_host_fabric_name = 1, | |
212 | .show_starget_node_name = 1, | |
213 | .show_starget_port_name = 1, | |
214 | .show_starget_port_id = 1, | |
215 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
216 | .show_rport_dev_loss_tmo = 1, | |
217 | .get_fc_host_stats = fc_get_host_stats, | |
218 | .issue_fc_host_lip = fcoe_reset, | |
219 | ||
220 | .terminate_rport_io = fc_rport_terminate_io, | |
a51ab396 SM |
221 | |
222 | .bsg_request = fc_lport_bsg_request, | |
e9084bb8 CL |
223 | }; |
224 | ||
7f349142 VD |
225 | static struct scsi_host_template fcoe_shost_template = { |
226 | .module = THIS_MODULE, | |
227 | .name = "FCoE Driver", | |
228 | .proc_name = FCOE_NAME, | |
229 | .queuecommand = fc_queuecommand, | |
230 | .eh_abort_handler = fc_eh_abort, | |
231 | .eh_device_reset_handler = fc_eh_device_reset, | |
232 | .eh_host_reset_handler = fc_eh_host_reset, | |
233 | .slave_alloc = fc_slave_alloc, | |
234 | .change_queue_depth = fc_change_queue_depth, | |
235 | .change_queue_type = fc_change_queue_type, | |
236 | .this_id = -1, | |
14caf44c | 237 | .cmd_per_lun = 3, |
7f349142 VD |
238 | .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, |
239 | .use_clustering = ENABLE_CLUSTERING, | |
240 | .sg_tablesize = SG_ALL, | |
241 | .max_sectors = 0xffff, | |
242 | }; | |
243 | ||
54b649f8 | 244 | /** |
1875f27e RL |
245 | * fcoe_interface_setup() - Setup a FCoE interface |
246 | * @fcoe: The new FCoE interface | |
247 | * @netdev: The net device that the fcoe interface is on | |
54b649f8 CL |
248 | * |
249 | * Returns : 0 for success | |
2e70e241 | 250 | * Locking: must be called with the RTNL mutex held |
54b649f8 CL |
251 | */ |
252 | static int fcoe_interface_setup(struct fcoe_interface *fcoe, | |
253 | struct net_device *netdev) | |
254 | { | |
255 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
256 | struct netdev_hw_addr *ha; | |
5bab87e6 | 257 | struct net_device *real_dev; |
54b649f8 | 258 | u8 flogi_maddr[ETH_ALEN]; |
b7a727f1 | 259 | const struct net_device_ops *ops; |
54b649f8 CL |
260 | |
261 | fcoe->netdev = netdev; | |
262 | ||
b7a727f1 YZ |
263 | /* Let LLD initialize for FCoE */ |
264 | ops = netdev->netdev_ops; | |
265 | if (ops->ndo_fcoe_enable) { | |
266 | if (ops->ndo_fcoe_enable(netdev)) | |
267 | FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE" | |
268 | " specific feature for LLD.\n"); | |
269 | } | |
270 | ||
54b649f8 | 271 | /* Do not support for bonding device */ |
cc8bdf06 | 272 | if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) { |
59d92516 | 273 | FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n"); |
54b649f8 CL |
274 | return -EOPNOTSUPP; |
275 | } | |
276 | ||
277 | /* look for SAN MAC address, if multiple SAN MACs exist, only | |
278 | * use the first one for SPMA */ | |
5bab87e6 YZ |
279 | real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ? |
280 | vlan_dev_real_dev(netdev) : netdev; | |
54b649f8 | 281 | rcu_read_lock(); |
5bab87e6 | 282 | for_each_dev_addr(real_dev, ha) { |
54b649f8 | 283 | if ((ha->type == NETDEV_HW_ADDR_T_SAN) && |
bf361707 | 284 | (is_valid_ether_addr(ha->addr))) { |
54b649f8 CL |
285 | memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); |
286 | fip->spma = 1; | |
287 | break; | |
288 | } | |
289 | } | |
290 | rcu_read_unlock(); | |
291 | ||
292 | /* setup Source Mac Address */ | |
293 | if (!fip->spma) | |
294 | memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); | |
295 | ||
296 | /* | |
297 | * Add FCoE MAC address as second unicast MAC address | |
298 | * or enter promiscuous mode if not capable of listening | |
299 | * for multiple unicast MACs. | |
300 | */ | |
54b649f8 | 301 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
a748ee24 | 302 | dev_uc_add(netdev, flogi_maddr); |
54b649f8 | 303 | if (fip->spma) |
a748ee24 | 304 | dev_uc_add(netdev, fip->ctl_src_addr); |
e10f8c66 JE |
305 | if (fip->mode == FIP_MODE_VN2VN) { |
306 | dev_mc_add(netdev, FIP_ALL_VN2VN_MACS); | |
307 | dev_mc_add(netdev, FIP_ALL_P2P_MACS); | |
308 | } else | |
309 | dev_mc_add(netdev, FIP_ALL_ENODE_MACS); | |
54b649f8 CL |
310 | |
311 | /* | |
312 | * setup the receive function from ethernet driver | |
313 | * on the ethertype for the given device | |
314 | */ | |
315 | fcoe->fcoe_packet_type.func = fcoe_rcv; | |
316 | fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE); | |
317 | fcoe->fcoe_packet_type.dev = netdev; | |
318 | dev_add_pack(&fcoe->fcoe_packet_type); | |
319 | ||
320 | fcoe->fip_packet_type.func = fcoe_fip_recv; | |
321 | fcoe->fip_packet_type.type = htons(ETH_P_FIP); | |
322 | fcoe->fip_packet_type.dev = netdev; | |
323 | dev_add_pack(&fcoe->fip_packet_type); | |
324 | ||
325 | return 0; | |
326 | } | |
327 | ||
030f4e00 | 328 | /** |
1875f27e RL |
329 | * fcoe_interface_create() - Create a FCoE interface on a net device |
330 | * @netdev: The net device to create the FCoE interface on | |
1dd454d9 | 331 | * @fip_mode: The mode to use for FIP |
030f4e00 CL |
332 | * |
333 | * Returns: pointer to a struct fcoe_interface or NULL on error | |
334 | */ | |
1dd454d9 JE |
335 | static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev, |
336 | enum fip_state fip_mode) | |
030f4e00 CL |
337 | { |
338 | struct fcoe_interface *fcoe; | |
59d92516 | 339 | int err; |
030f4e00 | 340 | |
7287fb91 RL |
341 | if (!try_module_get(THIS_MODULE)) { |
342 | FCOE_NETDEV_DBG(netdev, | |
343 | "Could not get a reference to the module\n"); | |
344 | fcoe = ERR_PTR(-EBUSY); | |
345 | goto out; | |
346 | } | |
347 | ||
030f4e00 CL |
348 | fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL); |
349 | if (!fcoe) { | |
350 | FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n"); | |
7287fb91 RL |
351 | fcoe = ERR_PTR(-ENOMEM); |
352 | goto out_nomod; | |
030f4e00 CL |
353 | } |
354 | ||
2e70e241 | 355 | dev_hold(netdev); |
030f4e00 | 356 | kref_init(&fcoe->kref); |
54b649f8 CL |
357 | |
358 | /* | |
359 | * Initialize FIP. | |
360 | */ | |
1dd454d9 | 361 | fcoe_ctlr_init(&fcoe->ctlr, fip_mode); |
54b649f8 CL |
362 | fcoe->ctlr.send = fcoe_fip_send; |
363 | fcoe->ctlr.update_mac = fcoe_update_src_mac; | |
11b56188 | 364 | fcoe->ctlr.get_src_addr = fcoe_get_src_mac; |
54b649f8 | 365 | |
59d92516 | 366 | err = fcoe_interface_setup(fcoe, netdev); |
367 | if (err) { | |
368 | fcoe_ctlr_destroy(&fcoe->ctlr); | |
369 | kfree(fcoe); | |
370 | dev_put(netdev); | |
7287fb91 RL |
371 | fcoe = ERR_PTR(err); |
372 | goto out_nomod; | |
59d92516 | 373 | } |
030f4e00 | 374 | |
7287fb91 RL |
375 | goto out; |
376 | ||
377 | out_nomod: | |
378 | module_put(THIS_MODULE); | |
379 | out: | |
030f4e00 CL |
380 | return fcoe; |
381 | } | |
382 | ||
54b649f8 | 383 | /** |
1875f27e RL |
384 | * fcoe_interface_cleanup() - Clean up a FCoE interface |
385 | * @fcoe: The FCoE interface to be cleaned up | |
2e70e241 CL |
386 | * |
387 | * Caller must be holding the RTNL mutex | |
54b649f8 CL |
388 | */ |
389 | void fcoe_interface_cleanup(struct fcoe_interface *fcoe) | |
390 | { | |
391 | struct net_device *netdev = fcoe->netdev; | |
392 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
393 | u8 flogi_maddr[ETH_ALEN]; | |
b7a727f1 | 394 | const struct net_device_ops *ops; |
54b649f8 CL |
395 | |
396 | /* | |
397 | * Don't listen for Ethernet packets anymore. | |
398 | * synchronize_net() ensures that the packet handlers are not running | |
399 | * on another CPU. dev_remove_pack() would do that, this calls the | |
400 | * unsyncronized version __dev_remove_pack() to avoid multiple delays. | |
401 | */ | |
402 | __dev_remove_pack(&fcoe->fcoe_packet_type); | |
403 | __dev_remove_pack(&fcoe->fip_packet_type); | |
404 | synchronize_net(); | |
405 | ||
54b649f8 | 406 | /* Delete secondary MAC addresses */ |
54b649f8 | 407 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
a748ee24 | 408 | dev_uc_del(netdev, flogi_maddr); |
54b649f8 | 409 | if (fip->spma) |
a748ee24 | 410 | dev_uc_del(netdev, fip->ctl_src_addr); |
e10f8c66 JE |
411 | if (fip->mode == FIP_MODE_VN2VN) { |
412 | dev_mc_del(netdev, FIP_ALL_VN2VN_MACS); | |
413 | dev_mc_del(netdev, FIP_ALL_P2P_MACS); | |
414 | } else | |
415 | dev_mc_del(netdev, FIP_ALL_ENODE_MACS); | |
b7a727f1 YZ |
416 | |
417 | /* Tell the LLD we are done w/ FCoE */ | |
418 | ops = netdev->netdev_ops; | |
419 | if (ops->ndo_fcoe_disable) { | |
420 | if (ops->ndo_fcoe_disable(netdev)) | |
421 | FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" | |
422 | " specific feature for LLD.\n"); | |
423 | } | |
54b649f8 CL |
424 | } |
425 | ||
030f4e00 CL |
426 | /** |
427 | * fcoe_interface_release() - fcoe_port kref release function | |
1875f27e | 428 | * @kref: Embedded reference count in an fcoe_interface struct |
030f4e00 CL |
429 | */ |
430 | static void fcoe_interface_release(struct kref *kref) | |
431 | { | |
432 | struct fcoe_interface *fcoe; | |
2e70e241 | 433 | struct net_device *netdev; |
030f4e00 CL |
434 | |
435 | fcoe = container_of(kref, struct fcoe_interface, kref); | |
2e70e241 CL |
436 | netdev = fcoe->netdev; |
437 | /* tear-down the FCoE controller */ | |
438 | fcoe_ctlr_destroy(&fcoe->ctlr); | |
030f4e00 | 439 | kfree(fcoe); |
2e70e241 | 440 | dev_put(netdev); |
7287fb91 | 441 | module_put(THIS_MODULE); |
030f4e00 CL |
442 | } |
443 | ||
444 | /** | |
1875f27e RL |
445 | * fcoe_interface_get() - Get a reference to a FCoE interface |
446 | * @fcoe: The FCoE interface to be held | |
030f4e00 CL |
447 | */ |
448 | static inline void fcoe_interface_get(struct fcoe_interface *fcoe) | |
449 | { | |
450 | kref_get(&fcoe->kref); | |
451 | } | |
452 | ||
453 | /** | |
1875f27e RL |
454 | * fcoe_interface_put() - Put a reference to a FCoE interface |
455 | * @fcoe: The FCoE interface to be released | |
030f4e00 CL |
456 | */ |
457 | static inline void fcoe_interface_put(struct fcoe_interface *fcoe) | |
458 | { | |
459 | kref_put(&fcoe->kref, fcoe_interface_release); | |
460 | } | |
461 | ||
ab6b85c1 | 462 | /** |
1875f27e RL |
463 | * fcoe_fip_recv() - Handler for received FIP frames |
464 | * @skb: The receive skb | |
465 | * @netdev: The associated net device | |
466 | * @ptype: The packet_type structure which was used to register this handler | |
467 | * @orig_dev: The original net_device the the skb was received on. | |
468 | * (in case dev is a bond) | |
ab6b85c1 VD |
469 | * |
470 | * Returns: 0 for success | |
471 | */ | |
1875f27e | 472 | static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, |
ab6b85c1 VD |
473 | struct packet_type *ptype, |
474 | struct net_device *orig_dev) | |
475 | { | |
259ad85d | 476 | struct fcoe_interface *fcoe; |
ab6b85c1 | 477 | |
259ad85d | 478 | fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); |
3fe9a0ba | 479 | fcoe_ctlr_recv(&fcoe->ctlr, skb); |
ab6b85c1 VD |
480 | return 0; |
481 | } | |
482 | ||
483 | /** | |
1875f27e RL |
484 | * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame |
485 | * @fip: The FCoE controller | |
486 | * @skb: The FIP packet to be sent | |
ab6b85c1 VD |
487 | */ |
488 | static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
489 | { | |
3fe9a0ba | 490 | skb->dev = fcoe_from_ctlr(fip)->netdev; |
ab6b85c1 VD |
491 | dev_queue_xmit(skb); |
492 | } | |
493 | ||
494 | /** | |
1875f27e RL |
495 | * fcoe_update_src_mac() - Update the Ethernet MAC filters |
496 | * @lport: The local port to update the source MAC on | |
497 | * @addr: Unicast MAC address to add | |
ab6b85c1 VD |
498 | * |
499 | * Remove any previously-set unicast MAC filter. | |
500 | * Add secondary FCoE MAC address filter for our OUI. | |
501 | */ | |
11b56188 | 502 | static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) |
ab6b85c1 | 503 | { |
11b56188 | 504 | struct fcoe_port *port = lport_priv(lport); |
8597ae8b | 505 | struct fcoe_interface *fcoe = port->priv; |
25024989 | 506 | |
ab6b85c1 | 507 | rtnl_lock(); |
11b56188 | 508 | if (!is_zero_ether_addr(port->data_src_addr)) |
a748ee24 | 509 | dev_uc_del(fcoe->netdev, port->data_src_addr); |
11b56188 | 510 | if (!is_zero_ether_addr(addr)) |
a748ee24 | 511 | dev_uc_add(fcoe->netdev, addr); |
11b56188 | 512 | memcpy(port->data_src_addr, addr, ETH_ALEN); |
ab6b85c1 VD |
513 | rtnl_unlock(); |
514 | } | |
515 | ||
11b56188 CL |
516 | /** |
517 | * fcoe_get_src_mac() - return the Ethernet source address for an lport | |
518 | * @lport: libfc lport | |
519 | */ | |
520 | static u8 *fcoe_get_src_mac(struct fc_lport *lport) | |
521 | { | |
522 | struct fcoe_port *port = lport_priv(lport); | |
523 | ||
524 | return port->data_src_addr; | |
525 | } | |
526 | ||
7f349142 | 527 | /** |
1875f27e RL |
528 | * fcoe_lport_config() - Set up a local port |
529 | * @lport: The local port to be setup | |
7f349142 VD |
530 | * |
531 | * Returns: 0 for success | |
532 | */ | |
1875f27e | 533 | static int fcoe_lport_config(struct fc_lport *lport) |
7f349142 | 534 | { |
1875f27e RL |
535 | lport->link_up = 0; |
536 | lport->qfull = 0; | |
537 | lport->max_retry_count = 3; | |
538 | lport->max_rport_retry_count = 3; | |
539 | lport->e_d_tov = 2 * 1000; /* FC-FS default */ | |
540 | lport->r_a_tov = 2 * 2 * 1000; | |
541 | lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | | |
542 | FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); | |
543 | lport->does_npiv = 1; | |
544 | ||
545 | fc_lport_init_stats(lport); | |
7f349142 VD |
546 | |
547 | /* lport fc_lport related configuration */ | |
1875f27e | 548 | fc_lport_config(lport); |
7f349142 VD |
549 | |
550 | /* offload related configuration */ | |
1875f27e RL |
551 | lport->crc_offload = 0; |
552 | lport->seq_offload = 0; | |
553 | lport->lro_enabled = 0; | |
554 | lport->lro_xid = 0; | |
555 | lport->lso_max = 0; | |
7f349142 VD |
556 | |
557 | return 0; | |
558 | } | |
559 | ||
dcece412 YZ |
560 | /** |
561 | * fcoe_get_wwn() - Get the world wide name from LLD if it supports it | |
562 | * @netdev: the associated net device | |
563 | * @wwn: the output WWN | |
564 | * @type: the type of WWN (WWPN or WWNN) | |
565 | * | |
566 | * Returns: 0 for success | |
567 | */ | |
568 | static int fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type) | |
569 | { | |
570 | const struct net_device_ops *ops = netdev->netdev_ops; | |
571 | ||
572 | if (ops->ndo_fcoe_get_wwn) | |
573 | return ops->ndo_fcoe_get_wwn(netdev, wwn, type); | |
574 | return -EINVAL; | |
575 | } | |
576 | ||
54a5b21d YZ |
577 | /** |
578 | * fcoe_netdev_features_change - Updates the lport's offload flags based | |
579 | * on the LLD netdev's FCoE feature flags | |
580 | */ | |
581 | static void fcoe_netdev_features_change(struct fc_lport *lport, | |
582 | struct net_device *netdev) | |
583 | { | |
584 | mutex_lock(&lport->lp_mutex); | |
585 | ||
586 | if (netdev->features & NETIF_F_SG) | |
587 | lport->sg_supp = 1; | |
588 | else | |
589 | lport->sg_supp = 0; | |
590 | ||
591 | if (netdev->features & NETIF_F_FCOE_CRC) { | |
592 | lport->crc_offload = 1; | |
593 | FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); | |
594 | } else { | |
595 | lport->crc_offload = 0; | |
596 | } | |
597 | ||
598 | if (netdev->features & NETIF_F_FSO) { | |
599 | lport->seq_offload = 1; | |
600 | lport->lso_max = netdev->gso_max_size; | |
601 | FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", | |
602 | lport->lso_max); | |
603 | } else { | |
604 | lport->seq_offload = 0; | |
605 | lport->lso_max = 0; | |
606 | } | |
607 | ||
608 | if (netdev->fcoe_ddp_xid) { | |
609 | lport->lro_enabled = 1; | |
610 | lport->lro_xid = netdev->fcoe_ddp_xid; | |
611 | FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", | |
612 | lport->lro_xid); | |
613 | } else { | |
614 | lport->lro_enabled = 0; | |
615 | lport->lro_xid = 0; | |
616 | } | |
617 | ||
618 | mutex_unlock(&lport->lp_mutex); | |
619 | } | |
620 | ||
7f349142 | 621 | /** |
1875f27e RL |
622 | * fcoe_netdev_config() - Set up net devive for SW FCoE |
623 | * @lport: The local port that is associated with the net device | |
624 | * @netdev: The associated net device | |
7f349142 | 625 | * |
1875f27e | 626 | * Must be called after fcoe_lport_config() as it will use local port mutex |
7f349142 | 627 | * |
1875f27e | 628 | * Returns: 0 for success |
7f349142 | 629 | */ |
1875f27e | 630 | static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) |
7f349142 VD |
631 | { |
632 | u32 mfs; | |
633 | u64 wwnn, wwpn; | |
25024989 | 634 | struct fcoe_interface *fcoe; |
014f5c3f | 635 | struct fcoe_port *port; |
7f349142 VD |
636 | |
637 | /* Setup lport private data to point to fcoe softc */ | |
1875f27e | 638 | port = lport_priv(lport); |
8597ae8b | 639 | fcoe = port->priv; |
7f349142 VD |
640 | |
641 | /* | |
642 | * Determine max frame size based on underlying device and optional | |
643 | * user-configured limit. If the MFS is too low, fcoe_link_ok() | |
644 | * will return 0, so do this first. | |
645 | */ | |
7221d7e5 YZ |
646 | mfs = netdev->mtu; |
647 | if (netdev->features & NETIF_F_FCOE_MTU) { | |
648 | mfs = FCOE_MTU; | |
649 | FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); | |
650 | } | |
651 | mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); | |
1875f27e | 652 | if (fc_set_mfs(lport, mfs)) |
7f349142 VD |
653 | return -EINVAL; |
654 | ||
7f349142 | 655 | /* offload features support */ |
54a5b21d | 656 | fcoe_netdev_features_change(lport, netdev); |
7f349142 | 657 | |
014f5c3f CL |
658 | skb_queue_head_init(&port->fcoe_pending_queue); |
659 | port->fcoe_pending_queue_active = 0; | |
1875f27e | 660 | setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport); |
7f349142 | 661 | |
5e4f8fe7 RL |
662 | fcoe_link_speed_update(lport); |
663 | ||
1875f27e | 664 | if (!lport->vport) { |
dcece412 YZ |
665 | if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN)) |
666 | wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0); | |
1875f27e | 667 | fc_set_wwnn(lport, wwnn); |
dcece412 YZ |
668 | if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN)) |
669 | wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, | |
cf4aebca | 670 | 2, 0); |
1875f27e | 671 | fc_set_wwpn(lport, wwpn); |
9a05753b | 672 | } |
7f349142 | 673 | |
7f349142 VD |
674 | return 0; |
675 | } | |
676 | ||
677 | /** | |
1875f27e RL |
678 | * fcoe_shost_config() - Set up the SCSI host associated with a local port |
679 | * @lport: The local port | |
1875f27e | 680 | * @dev: The device associated with the SCSI host |
7f349142 VD |
681 | * |
682 | * Must be called after fcoe_lport_config() and fcoe_netdev_config() | |
683 | * | |
1875f27e | 684 | * Returns: 0 for success |
7f349142 | 685 | */ |
8ba00a4b | 686 | static int fcoe_shost_config(struct fc_lport *lport, struct device *dev) |
7f349142 VD |
687 | { |
688 | int rc = 0; | |
689 | ||
690 | /* lport scsi host config */ | |
1875f27e RL |
691 | lport->host->max_lun = FCOE_MAX_LUN; |
692 | lport->host->max_id = FCOE_MAX_FCP_TARGET; | |
693 | lport->host->max_channel = 0; | |
da87bfab VD |
694 | lport->host->max_cmd_len = FCOE_MAX_CMD_LEN; |
695 | ||
1875f27e | 696 | if (lport->vport) |
8ca86f84 | 697 | lport->host->transportt = fcoe_vport_scsi_transport; |
e9084bb8 | 698 | else |
8ca86f84 | 699 | lport->host->transportt = fcoe_nport_scsi_transport; |
7f349142 VD |
700 | |
701 | /* add the new host to the SCSI-ml */ | |
1875f27e | 702 | rc = scsi_add_host(lport->host, dev); |
7f349142 | 703 | if (rc) { |
1875f27e | 704 | FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " |
d5488eb9 | 705 | "error on scsi_add_host\n"); |
7f349142 VD |
706 | return rc; |
707 | } | |
9a05753b | 708 | |
1875f27e | 709 | if (!lport->vport) |
4be929be | 710 | fc_host_max_npiv_vports(lport->host) = USHRT_MAX; |
9a05753b | 711 | |
1875f27e | 712 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, |
5baa17c3 | 713 | "%s v%s over %s", FCOE_NAME, FCOE_VERSION, |
1875f27e | 714 | fcoe_netdev(lport)->name); |
7f349142 VD |
715 | |
716 | return 0; | |
717 | } | |
718 | ||
1875f27e RL |
719 | /** |
720 | * fcoe_oem_match() - The match routine for the offloaded exchange manager | |
721 | * @fp: The I/O frame | |
d7179680 | 722 | * |
1875f27e RL |
723 | * This routine will be associated with an exchange manager (EM). When |
724 | * the libfc exchange handling code is looking for an EM to use it will | |
725 | * call this routine and pass it the frame that it wishes to send. This | |
726 | * routine will return True if the associated EM is to be used and False | |
727 | * if the echange code should continue looking for an EM. | |
728 | * | |
729 | * The offload EM that this routine is associated with will handle any | |
730 | * packets that are for SCSI read requests. | |
731 | * | |
732 | * Returns: True for read types I/O, otherwise returns false. | |
d7179680 VD |
733 | */ |
734 | bool fcoe_oem_match(struct fc_frame *fp) | |
735 | { | |
05cc7390 YZ |
736 | return fc_fcp_is_read(fr_fsp(fp)) && |
737 | (fr_fsp(fp)->data_len > fcoe_ddp_min); | |
d7179680 VD |
738 | } |
739 | ||
7f349142 | 740 | /** |
1875f27e RL |
741 | * fcoe_em_config() - Allocate and configure an exchange manager |
742 | * @lport: The local port that the new EM will be associated with | |
7f349142 | 743 | * |
1875f27e | 744 | * Returns: 0 on success |
7f349142 | 745 | */ |
1875f27e | 746 | static inline int fcoe_em_config(struct fc_lport *lport) |
7f349142 | 747 | { |
1875f27e | 748 | struct fcoe_port *port = lport_priv(lport); |
8597ae8b | 749 | struct fcoe_interface *fcoe = port->priv; |
25024989 | 750 | struct fcoe_interface *oldfcoe = NULL; |
1d1b88dc | 751 | struct net_device *old_real_dev, *cur_real_dev; |
d7179680 VD |
752 | u16 min_xid = FCOE_MIN_XID; |
753 | u16 max_xid = FCOE_MAX_XID; | |
754 | ||
755 | /* | |
756 | * Check if need to allocate an em instance for | |
757 | * offload exchange ids to be shared across all VN_PORTs/lport. | |
758 | */ | |
1875f27e RL |
759 | if (!lport->lro_enabled || !lport->lro_xid || |
760 | (lport->lro_xid >= max_xid)) { | |
761 | lport->lro_xid = 0; | |
d7179680 VD |
762 | goto skip_oem; |
763 | } | |
764 | ||
765 | /* | |
766 | * Reuse existing offload em instance in case | |
1d1b88dc | 767 | * it is already allocated on real eth device |
d7179680 | 768 | */ |
25024989 CL |
769 | if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
770 | cur_real_dev = vlan_dev_real_dev(fcoe->netdev); | |
1d1b88dc | 771 | else |
25024989 | 772 | cur_real_dev = fcoe->netdev; |
1d1b88dc | 773 | |
25024989 | 774 | list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { |
25024989 CL |
775 | if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
776 | old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); | |
1d1b88dc | 777 | else |
25024989 | 778 | old_real_dev = oldfcoe->netdev; |
1d1b88dc VD |
779 | |
780 | if (cur_real_dev == old_real_dev) { | |
991cbb60 | 781 | fcoe->oem = oldfcoe->oem; |
d7179680 VD |
782 | break; |
783 | } | |
784 | } | |
785 | ||
991cbb60 | 786 | if (fcoe->oem) { |
1875f27e | 787 | if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { |
d7179680 VD |
788 | printk(KERN_ERR "fcoe_em_config: failed to add " |
789 | "offload em:%p on interface:%s\n", | |
991cbb60 | 790 | fcoe->oem, fcoe->netdev->name); |
d7179680 VD |
791 | return -ENOMEM; |
792 | } | |
793 | } else { | |
1875f27e RL |
794 | fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, |
795 | FCOE_MIN_XID, lport->lro_xid, | |
796 | fcoe_oem_match); | |
991cbb60 | 797 | if (!fcoe->oem) { |
d7179680 VD |
798 | printk(KERN_ERR "fcoe_em_config: failed to allocate " |
799 | "em for offload exches on interface:%s\n", | |
25024989 | 800 | fcoe->netdev->name); |
d7179680 VD |
801 | return -ENOMEM; |
802 | } | |
803 | } | |
804 | ||
805 | /* | |
806 | * Exclude offload EM xid range from next EM xid range. | |
807 | */ | |
1875f27e | 808 | min_xid += lport->lro_xid + 1; |
d7179680 VD |
809 | |
810 | skip_oem: | |
1875f27e | 811 | if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { |
d7179680 | 812 | printk(KERN_ERR "fcoe_em_config: failed to " |
25024989 | 813 | "allocate em on interface %s\n", fcoe->netdev->name); |
7f349142 | 814 | return -ENOMEM; |
d7179680 | 815 | } |
7f349142 VD |
816 | |
817 | return 0; | |
818 | } | |
819 | ||
820 | /** | |
1875f27e RL |
821 | * fcoe_if_destroy() - Tear down a SW FCoE instance |
822 | * @lport: The local port to be destroyed | |
34ce27bc VD |
823 | * |
824 | * Locking: must be called with the RTNL mutex held and RTNL mutex | |
825 | * needed to be dropped by this function since not dropping RTNL | |
826 | * would cause circular locking warning on synchronous fip worker | |
827 | * cancelling thru fcoe_interface_put invoked by this function. | |
828 | * | |
7f349142 | 829 | */ |
af7f85d9 | 830 | static void fcoe_if_destroy(struct fc_lport *lport) |
7f349142 | 831 | { |
014f5c3f | 832 | struct fcoe_port *port = lport_priv(lport); |
8597ae8b | 833 | struct fcoe_interface *fcoe = port->priv; |
25024989 | 834 | struct net_device *netdev = fcoe->netdev; |
7f349142 | 835 | |
d5488eb9 | 836 | FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); |
7f349142 | 837 | |
7f349142 | 838 | /* Logout of the fabric */ |
af7f85d9 | 839 | fc_fabric_logoff(lport); |
7f349142 | 840 | |
54b649f8 CL |
841 | /* Cleanup the fc_lport */ |
842 | fc_lport_destroy(lport); | |
54b649f8 CL |
843 | |
844 | /* Stop the transmit retry timer */ | |
845 | del_timer_sync(&port->timer); | |
ab6b85c1 | 846 | |
54b649f8 CL |
847 | /* Free existing transmit skbs */ |
848 | fcoe_clean_pending_queue(lport); | |
849 | ||
11b56188 | 850 | if (!is_zero_ether_addr(port->data_src_addr)) |
a748ee24 | 851 | dev_uc_del(netdev, port->data_src_addr); |
11b56188 CL |
852 | rtnl_unlock(); |
853 | ||
54b649f8 CL |
854 | /* receives may not be stopped until after this */ |
855 | fcoe_interface_put(fcoe); | |
7f349142 | 856 | |
f161fb72 | 857 | /* Free queued packets for the per-CPU receive threads */ |
af7f85d9 | 858 | fcoe_percpu_clean(lport); |
f161fb72 | 859 | |
7f349142 | 860 | /* Detach from the scsi-ml */ |
af7f85d9 CL |
861 | fc_remove_host(lport->host); |
862 | scsi_remove_host(lport->host); | |
7f349142 | 863 | |
80e736f8 YZ |
864 | /* Destroy lport scsi_priv */ |
865 | fc_fcp_destroy(lport); | |
866 | ||
7f349142 | 867 | /* There are no more rports or I/O, free the EM */ |
af7f85d9 | 868 | fc_exch_mgr_free(lport); |
7f349142 | 869 | |
7f349142 | 870 | /* Free memory used by statistical counters */ |
af7f85d9 | 871 | fc_lport_free_stats(lport); |
7f349142 | 872 | |
2e70e241 | 873 | /* Release the Scsi_Host */ |
af7f85d9 | 874 | scsi_host_put(lport->host); |
7f349142 VD |
875 | } |
876 | ||
1875f27e RL |
877 | /** |
878 | * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device | |
879 | * @lport: The local port to setup DDP for | |
880 | * @xid: The exchange ID for this DDP transfer | |
881 | * @sgl: The scatterlist describing this transfer | |
882 | * @sgc: The number of sg items | |
7f349142 | 883 | * |
1875f27e | 884 | * Returns: 0 if the DDP context was not configured |
7f349142 | 885 | */ |
1875f27e RL |
886 | static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, |
887 | struct scatterlist *sgl, unsigned int sgc) | |
7f349142 | 888 | { |
1875f27e | 889 | struct net_device *netdev = fcoe_netdev(lport); |
7f349142 | 890 | |
1875f27e RL |
891 | if (netdev->netdev_ops->ndo_fcoe_ddp_setup) |
892 | return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, | |
893 | xid, sgl, | |
894 | sgc); | |
7f349142 VD |
895 | |
896 | return 0; | |
897 | } | |
898 | ||
1875f27e RL |
899 | /** |
900 | * fcoe_ddp_done() - Call a LLD's ddp_done through the net device | |
901 | * @lport: The local port to complete DDP on | |
902 | * @xid: The exchange ID for this DDP transfer | |
7f349142 | 903 | * |
1875f27e | 904 | * Returns: the length of data that have been completed by DDP |
7f349142 | 905 | */ |
1875f27e | 906 | static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) |
7f349142 | 907 | { |
1875f27e | 908 | struct net_device *netdev = fcoe_netdev(lport); |
7f349142 | 909 | |
1875f27e RL |
910 | if (netdev->netdev_ops->ndo_fcoe_ddp_done) |
911 | return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); | |
7f349142 VD |
912 | return 0; |
913 | } | |
914 | ||
7f349142 | 915 | /** |
1875f27e RL |
916 | * fcoe_if_create() - Create a FCoE instance on an interface |
917 | * @fcoe: The FCoE interface to create a local port on | |
918 | * @parent: The device pointer to be the parent in sysfs for the SCSI host | |
919 | * @npiv: Indicates if the port is a vport or not | |
7f349142 | 920 | * |
1875f27e | 921 | * Creates a fc_lport instance and a Scsi_Host instance and configure them. |
7f349142 | 922 | * |
1875f27e | 923 | * Returns: The allocated fc_lport or an error pointer |
7f349142 | 924 | */ |
030f4e00 | 925 | static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, |
9a05753b | 926 | struct device *parent, int npiv) |
7f349142 | 927 | { |
1875f27e | 928 | struct net_device *netdev = fcoe->netdev; |
72fa396b | 929 | struct fc_lport *lport, *n_port; |
014f5c3f | 930 | struct fcoe_port *port; |
72fa396b | 931 | struct Scsi_Host *shost; |
1875f27e | 932 | int rc; |
9a05753b CL |
933 | /* |
934 | * parent is only a vport if npiv is 1, | |
935 | * but we'll only use vport in that case so go ahead and set it | |
936 | */ | |
937 | struct fc_vport *vport = dev_to_vport(parent); | |
7f349142 | 938 | |
d5488eb9 | 939 | FCOE_NETDEV_DBG(netdev, "Create Interface\n"); |
7f349142 | 940 | |
72fa396b VD |
941 | if (!npiv) |
942 | lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port)); | |
943 | else | |
944 | lport = libfc_vport_create(vport, sizeof(*port)); | |
945 | ||
86221969 | 946 | if (!lport) { |
d5488eb9 | 947 | FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); |
af7f85d9 | 948 | rc = -ENOMEM; |
030f4e00 | 949 | goto out; |
7f349142 | 950 | } |
014f5c3f | 951 | port = lport_priv(lport); |
2e70e241 | 952 | port->lport = lport; |
8597ae8b BPG |
953 | port->priv = fcoe; |
954 | port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH; | |
955 | port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH; | |
2e70e241 | 956 | INIT_WORK(&port->destroy_work, fcoe_destroy_work); |
7f349142 | 957 | |
1875f27e | 958 | /* configure a fc_lport including the exchange manager */ |
af7f85d9 | 959 | rc = fcoe_lport_config(lport); |
7f349142 | 960 | if (rc) { |
d5488eb9 RL |
961 | FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " |
962 | "interface\n"); | |
7f349142 VD |
963 | goto out_host_put; |
964 | } | |
965 | ||
9a05753b | 966 | if (npiv) { |
9f8f3aa6 CL |
967 | FCOE_NETDEV_DBG(netdev, "Setting vport names, " |
968 | "%16.16llx %16.16llx\n", | |
1875f27e | 969 | vport->node_name, vport->port_name); |
9a05753b CL |
970 | fc_set_wwnn(lport, vport->node_name); |
971 | fc_set_wwpn(lport, vport->port_name); | |
972 | } | |
973 | ||
ab6b85c1 | 974 | /* configure lport network properties */ |
af7f85d9 | 975 | rc = fcoe_netdev_config(lport, netdev); |
ab6b85c1 | 976 | if (rc) { |
d5488eb9 RL |
977 | FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " |
978 | "interface\n"); | |
54b649f8 | 979 | goto out_lp_destroy; |
ab6b85c1 | 980 | } |
97c8389d | 981 | |
7f349142 | 982 | /* configure lport scsi host properties */ |
8ba00a4b | 983 | rc = fcoe_shost_config(lport, parent); |
7f349142 | 984 | if (rc) { |
d5488eb9 RL |
985 | FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " |
986 | "interface\n"); | |
54b649f8 | 987 | goto out_lp_destroy; |
7f349142 VD |
988 | } |
989 | ||
96316099 | 990 | /* Initialize the library */ |
e10f8c66 | 991 | rc = fcoe_libfc_config(lport, &fcoe->ctlr, &fcoe_libfc_fcn_templ, 1); |
7f349142 | 992 | if (rc) { |
96316099 | 993 | FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " |
d5488eb9 | 994 | "interface\n"); |
96316099 | 995 | goto out_lp_destroy; |
7f349142 VD |
996 | } |
997 | ||
72fa396b VD |
998 | /* |
999 | * fcoe_em_alloc() and fcoe_hostlist_add() both | |
1000 | * need to be atomic with respect to other changes to the | |
1001 | * hostlist since fcoe_em_alloc() looks for an existing EM | |
1002 | * instance on host list updated by fcoe_hostlist_add(). | |
1003 | * | |
1004 | * This is currently handled through the fcoe_config_mutex | |
1005 | * begin held. | |
1006 | */ | |
1007 | if (!npiv) | |
9a05753b CL |
1008 | /* lport exch manager allocation */ |
1009 | rc = fcoe_em_config(lport); | |
72fa396b VD |
1010 | else { |
1011 | shost = vport_to_shost(vport); | |
1012 | n_port = shost_priv(shost); | |
1013 | rc = fc_exch_mgr_list_clone(n_port, lport); | |
1014 | } | |
1015 | ||
1016 | if (rc) { | |
1017 | FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n"); | |
1018 | goto out_lp_destroy; | |
7f349142 VD |
1019 | } |
1020 | ||
030f4e00 | 1021 | fcoe_interface_get(fcoe); |
af7f85d9 | 1022 | return lport; |
7f349142 VD |
1023 | |
1024 | out_lp_destroy: | |
af7f85d9 | 1025 | fc_exch_mgr_free(lport); |
7f349142 | 1026 | out_host_put: |
af7f85d9 CL |
1027 | scsi_host_put(lport->host); |
1028 | out: | |
1029 | return ERR_PTR(rc); | |
7f349142 VD |
1030 | } |
1031 | ||
1032 | /** | |
1875f27e | 1033 | * fcoe_if_init() - Initialization routine for fcoe.ko |
7f349142 | 1034 | * |
1875f27e RL |
1035 | * Attaches the SW FCoE transport to the FC transport |
1036 | * | |
1037 | * Returns: 0 on success | |
7f349142 VD |
1038 | */ |
1039 | static int __init fcoe_if_init(void) | |
1040 | { | |
1041 | /* attach to scsi transport */ | |
8ca86f84 YZ |
1042 | fcoe_nport_scsi_transport = |
1043 | fc_attach_transport(&fcoe_nport_fc_functions); | |
1044 | fcoe_vport_scsi_transport = | |
1045 | fc_attach_transport(&fcoe_vport_fc_functions); | |
7f349142 | 1046 | |
8ca86f84 | 1047 | if (!fcoe_nport_scsi_transport) { |
d5488eb9 | 1048 | printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); |
7f349142 VD |
1049 | return -ENODEV; |
1050 | } | |
1051 | ||
1052 | return 0; | |
1053 | } | |
1054 | ||
1055 | /** | |
1875f27e RL |
1056 | * fcoe_if_exit() - Tear down fcoe.ko |
1057 | * | |
1058 | * Detaches the SW FCoE transport from the FC transport | |
7f349142 | 1059 | * |
1875f27e | 1060 | * Returns: 0 on success |
7f349142 VD |
1061 | */ |
1062 | int __exit fcoe_if_exit(void) | |
1063 | { | |
8ca86f84 YZ |
1064 | fc_release_transport(fcoe_nport_scsi_transport); |
1065 | fc_release_transport(fcoe_vport_scsi_transport); | |
1066 | fcoe_nport_scsi_transport = NULL; | |
1067 | fcoe_vport_scsi_transport = NULL; | |
7f349142 VD |
1068 | return 0; |
1069 | } | |
1070 | ||
8976f424 | 1071 | /** |
1875f27e RL |
1072 | * fcoe_percpu_thread_create() - Create a receive thread for an online CPU |
1073 | * @cpu: The CPU index of the CPU to create a receive thread for | |
8976f424 RL |
1074 | */ |
1075 | static void fcoe_percpu_thread_create(unsigned int cpu) | |
1076 | { | |
1077 | struct fcoe_percpu_s *p; | |
1078 | struct task_struct *thread; | |
1079 | ||
1080 | p = &per_cpu(fcoe_percpu, cpu); | |
1081 | ||
1082 | thread = kthread_create(fcoe_percpu_receive_thread, | |
1083 | (void *)p, "fcoethread/%d", cpu); | |
1084 | ||
e7a51997 | 1085 | if (likely(!IS_ERR(thread))) { |
8976f424 RL |
1086 | kthread_bind(thread, cpu); |
1087 | wake_up_process(thread); | |
1088 | ||
1089 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1090 | p->thread = thread; | |
1091 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1092 | } | |
1093 | } | |
1094 | ||
1095 | /** | |
1875f27e RL |
1096 | * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU |
1097 | * @cpu: The CPU index of the CPU whose receive thread is to be destroyed | |
8976f424 RL |
1098 | * |
1099 | * Destroys a per-CPU Rx thread. Any pending skbs are moved to the | |
1100 | * current CPU's Rx thread. If the thread being destroyed is bound to | |
1101 | * the CPU processing this context the skbs will be freed. | |
1102 | */ | |
1103 | static void fcoe_percpu_thread_destroy(unsigned int cpu) | |
1104 | { | |
1105 | struct fcoe_percpu_s *p; | |
1106 | struct task_struct *thread; | |
1107 | struct page *crc_eof; | |
1108 | struct sk_buff *skb; | |
1109 | #ifdef CONFIG_SMP | |
1110 | struct fcoe_percpu_s *p0; | |
f018b73a | 1111 | unsigned targ_cpu = get_cpu(); |
8976f424 RL |
1112 | #endif /* CONFIG_SMP */ |
1113 | ||
d5488eb9 | 1114 | FCOE_DBG("Destroying receive thread for CPU %d\n", cpu); |
8976f424 RL |
1115 | |
1116 | /* Prevent any new skbs from being queued for this CPU. */ | |
1117 | p = &per_cpu(fcoe_percpu, cpu); | |
1118 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1119 | thread = p->thread; | |
1120 | p->thread = NULL; | |
1121 | crc_eof = p->crc_eof_page; | |
1122 | p->crc_eof_page = NULL; | |
1123 | p->crc_eof_offset = 0; | |
1124 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1125 | ||
1126 | #ifdef CONFIG_SMP | |
1127 | /* | |
1128 | * Don't bother moving the skb's if this context is running | |
1129 | * on the same CPU that is having its thread destroyed. This | |
1130 | * can easily happen when the module is removed. | |
1131 | */ | |
1132 | if (cpu != targ_cpu) { | |
1133 | p0 = &per_cpu(fcoe_percpu, targ_cpu); | |
1134 | spin_lock_bh(&p0->fcoe_rx_list.lock); | |
1135 | if (p0->thread) { | |
d5488eb9 RL |
1136 | FCOE_DBG("Moving frames from CPU %d to CPU %d\n", |
1137 | cpu, targ_cpu); | |
8976f424 RL |
1138 | |
1139 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1140 | __skb_queue_tail(&p0->fcoe_rx_list, skb); | |
1141 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
1142 | } else { | |
1143 | /* | |
1144 | * The targeted CPU is not initialized and cannot accept | |
1875f27e | 1145 | * new skbs. Unlock the targeted CPU and drop the skbs |
8976f424 RL |
1146 | * on the CPU that is going offline. |
1147 | */ | |
1148 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1149 | kfree_skb(skb); | |
1150 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
1151 | } | |
1152 | } else { | |
1153 | /* | |
1154 | * This scenario occurs when the module is being removed | |
1155 | * and all threads are being destroyed. skbs will continue | |
1156 | * to be shifted from the CPU thread that is being removed | |
1157 | * to the CPU thread associated with the CPU that is processing | |
1158 | * the module removal. Once there is only one CPU Rx thread it | |
1159 | * will reach this case and we will drop all skbs and later | |
1160 | * stop the thread. | |
1161 | */ | |
1162 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1163 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1164 | kfree_skb(skb); | |
1165 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1166 | } | |
f018b73a | 1167 | put_cpu(); |
8976f424 RL |
1168 | #else |
1169 | /* | |
dd3fd72e | 1170 | * This a non-SMP scenario where the singular Rx thread is |
8976f424 RL |
1171 | * being removed. Free all skbs and stop the thread. |
1172 | */ | |
1173 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1174 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1175 | kfree_skb(skb); | |
1176 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1177 | #endif | |
1178 | ||
1179 | if (thread) | |
1180 | kthread_stop(thread); | |
1181 | ||
1182 | if (crc_eof) | |
1183 | put_page(crc_eof); | |
1184 | } | |
1185 | ||
1186 | /** | |
1875f27e RL |
1187 | * fcoe_cpu_callback() - Handler for CPU hotplug events |
1188 | * @nfb: The callback data block | |
1189 | * @action: The event triggering the callback | |
1190 | * @hcpu: The index of the CPU that the event is for | |
8976f424 | 1191 | * |
1875f27e | 1192 | * This creates or destroys per-CPU data for fcoe |
8976f424 RL |
1193 | * |
1194 | * Returns NOTIFY_OK always. | |
1195 | */ | |
1196 | static int fcoe_cpu_callback(struct notifier_block *nfb, | |
1197 | unsigned long action, void *hcpu) | |
1198 | { | |
1199 | unsigned cpu = (unsigned long)hcpu; | |
1200 | ||
1201 | switch (action) { | |
1202 | case CPU_ONLINE: | |
1203 | case CPU_ONLINE_FROZEN: | |
d5488eb9 | 1204 | FCOE_DBG("CPU %x online: Create Rx thread\n", cpu); |
8976f424 RL |
1205 | fcoe_percpu_thread_create(cpu); |
1206 | break; | |
1207 | case CPU_DEAD: | |
1208 | case CPU_DEAD_FROZEN: | |
d5488eb9 | 1209 | FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu); |
8976f424 RL |
1210 | fcoe_percpu_thread_destroy(cpu); |
1211 | break; | |
1212 | default: | |
1213 | break; | |
1214 | } | |
1215 | return NOTIFY_OK; | |
1216 | } | |
1217 | ||
85b4aa49 | 1218 | /** |
1875f27e RL |
1219 | * fcoe_rcv() - Receive packets from a net device |
1220 | * @skb: The received packet | |
1221 | * @netdev: The net device that the packet was received on | |
1222 | * @ptype: The packet type context | |
1223 | * @olddev: The last device net device | |
85b4aa49 | 1224 | * |
1875f27e RL |
1225 | * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a |
1226 | * FC frame and passes the frame to libfc. | |
85b4aa49 RL |
1227 | * |
1228 | * Returns: 0 for success | |
34f42a07 | 1229 | */ |
1875f27e | 1230 | int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, |
85b4aa49 RL |
1231 | struct packet_type *ptype, struct net_device *olddev) |
1232 | { | |
1875f27e | 1233 | struct fc_lport *lport; |
85b4aa49 | 1234 | struct fcoe_rcv_info *fr; |
259ad85d | 1235 | struct fcoe_interface *fcoe; |
85b4aa49 | 1236 | struct fc_frame_header *fh; |
85b4aa49 | 1237 | struct fcoe_percpu_s *fps; |
519e5135 | 1238 | struct ethhdr *eh; |
b2f0091f | 1239 | unsigned int cpu; |
85b4aa49 | 1240 | |
259ad85d | 1241 | fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); |
1875f27e RL |
1242 | lport = fcoe->ctlr.lp; |
1243 | if (unlikely(!lport)) { | |
1244 | FCOE_NETDEV_DBG(netdev, "Cannot find hba structure"); | |
85b4aa49 RL |
1245 | goto err2; |
1246 | } | |
1875f27e | 1247 | if (!lport->link_up) |
97c8389d | 1248 | goto err2; |
85b4aa49 | 1249 | |
1875f27e | 1250 | FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p " |
d5488eb9 RL |
1251 | "data:%p tail:%p end:%p sum:%d dev:%s", |
1252 | skb->len, skb->data_len, skb->head, skb->data, | |
1253 | skb_tail_pointer(skb), skb_end_pointer(skb), | |
1254 | skb->csum, skb->dev ? skb->dev->name : "<NULL>"); | |
85b4aa49 | 1255 | |
519e5135 | 1256 | eh = eth_hdr(skb); |
519e5135 VD |
1257 | |
1258 | if (is_fip_mode(&fcoe->ctlr) && | |
1259 | compare_ether_addr(eh->h_source, fcoe->ctlr.dest_addr)) { | |
1260 | FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n", | |
1261 | eh->h_source); | |
85b4aa49 RL |
1262 | goto err; |
1263 | } | |
1264 | ||
1265 | /* | |
1266 | * Check for minimum frame length, and make sure required FCoE | |
1267 | * and FC headers are pulled into the linear data area. | |
1268 | */ | |
1269 | if (unlikely((skb->len < FCOE_MIN_FRAME) || | |
1875f27e | 1270 | !pskb_may_pull(skb, FCOE_HEADER_LEN))) |
85b4aa49 RL |
1271 | goto err; |
1272 | ||
1273 | skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); | |
1274 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1275 | ||
0ee31cb5 RL |
1276 | if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) { |
1277 | FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n", | |
1278 | eh->h_dest); | |
1279 | goto err; | |
1280 | } | |
1281 | ||
85b4aa49 | 1282 | fr = fcoe_dev_from_skb(skb); |
1875f27e | 1283 | fr->fr_dev = lport; |
85b4aa49 | 1284 | fr->ptype = ptype; |
5e5e92df | 1285 | |
85b4aa49 | 1286 | /* |
b2f0091f VD |
1287 | * In case the incoming frame's exchange is originated from |
1288 | * the initiator, then received frame's exchange id is ANDed | |
1289 | * with fc_cpu_mask bits to get the same cpu on which exchange | |
1290 | * was originated, otherwise just use the current cpu. | |
85b4aa49 | 1291 | */ |
b2f0091f VD |
1292 | if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) |
1293 | cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; | |
1294 | else | |
1295 | cpu = smp_processor_id(); | |
5e5e92df | 1296 | |
8976f424 | 1297 | fps = &per_cpu(fcoe_percpu, cpu); |
85b4aa49 | 1298 | spin_lock_bh(&fps->fcoe_rx_list.lock); |
8976f424 RL |
1299 | if (unlikely(!fps->thread)) { |
1300 | /* | |
1301 | * The targeted CPU is not ready, let's target | |
1302 | * the first CPU now. For non-SMP systems this | |
1303 | * will check the same CPU twice. | |
1304 | */ | |
1875f27e | 1305 | FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread " |
d5488eb9 RL |
1306 | "ready for incoming skb- using first online " |
1307 | "CPU.\n"); | |
8976f424 RL |
1308 | |
1309 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
6957177f | 1310 | cpu = cpumask_first(cpu_online_mask); |
8976f424 RL |
1311 | fps = &per_cpu(fcoe_percpu, cpu); |
1312 | spin_lock_bh(&fps->fcoe_rx_list.lock); | |
1313 | if (!fps->thread) { | |
1314 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1315 | goto err; | |
1316 | } | |
1317 | } | |
1318 | ||
1319 | /* | |
1320 | * We now have a valid CPU that we're targeting for | |
1321 | * this skb. We also have this receive thread locked, | |
1322 | * so we're free to queue skbs into it's queue. | |
1323 | */ | |
85b4aa49 | 1324 | |
859b7b64 CL |
1325 | /* If this is a SCSI-FCP frame, and this is already executing on the |
1326 | * correct CPU, and the queue for this CPU is empty, then go ahead | |
1327 | * and process the frame directly in the softirq context. | |
1328 | * This lets us process completions without context switching from the | |
1329 | * NET_RX softirq, to our receive processing thread, and then back to | |
1330 | * BLOCK softirq context. | |
1331 | */ | |
1332 | if (fh->fh_type == FC_TYPE_FCP && | |
1333 | cpu == smp_processor_id() && | |
1334 | skb_queue_empty(&fps->fcoe_rx_list)) { | |
1335 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1336 | fcoe_recv_frame(skb); | |
1337 | } else { | |
1338 | __skb_queue_tail(&fps->fcoe_rx_list, skb); | |
1339 | if (fps->fcoe_rx_list.qlen == 1) | |
1340 | wake_up_process(fps->thread); | |
1341 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1342 | } | |
85b4aa49 RL |
1343 | |
1344 | return 0; | |
1345 | err: | |
f018b73a JE |
1346 | per_cpu_ptr(lport->dev_stats, get_cpu())->ErrorFrames++; |
1347 | put_cpu(); | |
85b4aa49 RL |
1348 | err2: |
1349 | kfree_skb(skb); | |
1350 | return -1; | |
1351 | } | |
85b4aa49 RL |
1352 | |
1353 | /** | |
8597ae8b | 1354 | * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC |
1875f27e RL |
1355 | * @skb: The packet to be transmitted |
1356 | * @tlen: The total length of the trailer | |
1357 | * | |
85b4aa49 | 1358 | * Returns: 0 for success |
34f42a07 | 1359 | */ |
8597ae8b | 1360 | static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen) |
85b4aa49 RL |
1361 | { |
1362 | struct fcoe_percpu_s *fps; | |
8597ae8b | 1363 | int rc; |
85b4aa49 | 1364 | |
5e5e92df | 1365 | fps = &get_cpu_var(fcoe_percpu); |
8597ae8b | 1366 | rc = fcoe_get_paged_crc_eof(skb, tlen, fps); |
5e5e92df | 1367 | put_cpu_var(fcoe_percpu); |
85b4aa49 | 1368 | |
8597ae8b | 1369 | return rc; |
85b4aa49 | 1370 | } |
85b4aa49 RL |
1371 | |
1372 | /** | |
1875f27e RL |
1373 | * fcoe_xmit() - Transmit a FCoE frame |
1374 | * @lport: The local port that the frame is to be transmitted for | |
1375 | * @fp: The frame to be transmitted | |
85b4aa49 | 1376 | * |
1875f27e | 1377 | * Return: 0 for success |
34f42a07 | 1378 | */ |
1875f27e | 1379 | int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) |
85b4aa49 | 1380 | { |
4bb6b515 | 1381 | int wlen; |
85b4aa49 RL |
1382 | u32 crc; |
1383 | struct ethhdr *eh; | |
1384 | struct fcoe_crc_eof *cp; | |
1385 | struct sk_buff *skb; | |
1386 | struct fcoe_dev_stats *stats; | |
1387 | struct fc_frame_header *fh; | |
1388 | unsigned int hlen; /* header length implies the version */ | |
1389 | unsigned int tlen; /* trailer length */ | |
1390 | unsigned int elen; /* eth header, may include vlan */ | |
1875f27e | 1391 | struct fcoe_port *port = lport_priv(lport); |
8597ae8b | 1392 | struct fcoe_interface *fcoe = port->priv; |
85b4aa49 RL |
1393 | u8 sof, eof; |
1394 | struct fcoe_hdr *hp; | |
1395 | ||
1396 | WARN_ON((fr_len(fp) % sizeof(u32)) != 0); | |
1397 | ||
85b4aa49 | 1398 | fh = fc_frame_header_get(fp); |
97c8389d JE |
1399 | skb = fp_skb(fp); |
1400 | wlen = skb->len / FCOE_WORD_TO_BYTE; | |
1401 | ||
1875f27e | 1402 | if (!lport->link_up) { |
3caf02ee | 1403 | kfree_skb(skb); |
97c8389d | 1404 | return 0; |
85b4aa49 RL |
1405 | } |
1406 | ||
9860eeb4 | 1407 | if (unlikely(fh->fh_type == FC_TYPE_ELS) && |
1875f27e | 1408 | fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb)) |
97c8389d JE |
1409 | return 0; |
1410 | ||
85b4aa49 RL |
1411 | sof = fr_sof(fp); |
1412 | eof = fr_eof(fp); | |
1413 | ||
4e57e1cb | 1414 | elen = sizeof(struct ethhdr); |
85b4aa49 RL |
1415 | hlen = sizeof(struct fcoe_hdr); |
1416 | tlen = sizeof(struct fcoe_crc_eof); | |
1417 | wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; | |
1418 | ||
1419 | /* crc offload */ | |
1875f27e | 1420 | if (likely(lport->crc_offload)) { |
39ca9a06 | 1421 | skb->ip_summed = CHECKSUM_PARTIAL; |
85b4aa49 RL |
1422 | skb->csum_start = skb_headroom(skb); |
1423 | skb->csum_offset = skb->len; | |
1424 | crc = 0; | |
1425 | } else { | |
1426 | skb->ip_summed = CHECKSUM_NONE; | |
1427 | crc = fcoe_fc_crc(fp); | |
1428 | } | |
1429 | ||
014f5c3f | 1430 | /* copy port crc and eof to the skb buff */ |
85b4aa49 RL |
1431 | if (skb_is_nonlinear(skb)) { |
1432 | skb_frag_t *frag; | |
8597ae8b | 1433 | if (fcoe_alloc_paged_crc_eof(skb, tlen)) { |
e9041581 | 1434 | kfree_skb(skb); |
85b4aa49 RL |
1435 | return -ENOMEM; |
1436 | } | |
1437 | frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; | |
1438 | cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ) | |
1439 | + frag->page_offset; | |
1440 | } else { | |
1441 | cp = (struct fcoe_crc_eof *)skb_put(skb, tlen); | |
1442 | } | |
1443 | ||
1444 | memset(cp, 0, sizeof(*cp)); | |
1445 | cp->fcoe_eof = eof; | |
1446 | cp->fcoe_crc32 = cpu_to_le32(~crc); | |
1447 | ||
1448 | if (skb_is_nonlinear(skb)) { | |
1449 | kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ); | |
1450 | cp = NULL; | |
1451 | } | |
1452 | ||
014f5c3f | 1453 | /* adjust skb network/transport offsets to match mac/fcoe/port */ |
85b4aa49 RL |
1454 | skb_push(skb, elen + hlen); |
1455 | skb_reset_mac_header(skb); | |
1456 | skb_reset_network_header(skb); | |
1457 | skb->mac_len = elen; | |
211c738d | 1458 | skb->protocol = htons(ETH_P_FCOE); |
3fe9a0ba | 1459 | skb->dev = fcoe->netdev; |
85b4aa49 RL |
1460 | |
1461 | /* fill up mac and fcoe headers */ | |
1462 | eh = eth_hdr(skb); | |
1463 | eh->h_proto = htons(ETH_P_FCOE); | |
cd229e42 | 1464 | memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN); |
3fe9a0ba | 1465 | if (fcoe->ctlr.map_dest) |
cd229e42 | 1466 | memcpy(eh->h_dest + 3, fh->fh_d_id, 3); |
85b4aa49 | 1467 | |
3fe9a0ba CL |
1468 | if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN)) |
1469 | memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN); | |
85b4aa49 | 1470 | else |
11b56188 | 1471 | memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); |
85b4aa49 RL |
1472 | |
1473 | hp = (struct fcoe_hdr *)(eh + 1); | |
1474 | memset(hp, 0, sizeof(*hp)); | |
1475 | if (FC_FCOE_VER) | |
1476 | FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); | |
1477 | hp->fcoe_sof = sof; | |
1478 | ||
39ca9a06 | 1479 | /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ |
1875f27e | 1480 | if (lport->seq_offload && fr_max_payload(fp)) { |
39ca9a06 YZ |
1481 | skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; |
1482 | skb_shinfo(skb)->gso_size = fr_max_payload(fp); | |
1483 | } else { | |
1484 | skb_shinfo(skb)->gso_type = 0; | |
1485 | skb_shinfo(skb)->gso_size = 0; | |
1486 | } | |
85b4aa49 | 1487 | /* update tx stats: regardless if LLD fails */ |
f018b73a | 1488 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); |
582b45bc RL |
1489 | stats->TxFrames++; |
1490 | stats->TxWords += wlen; | |
f018b73a | 1491 | put_cpu(); |
85b4aa49 RL |
1492 | |
1493 | /* send down to lld */ | |
1875f27e | 1494 | fr_dev(fp) = lport; |
014f5c3f | 1495 | if (port->fcoe_pending_queue.qlen) |
1875f27e | 1496 | fcoe_check_wait_queue(lport, skb); |
4bb6b515 | 1497 | else if (fcoe_start_io(skb)) |
1875f27e | 1498 | fcoe_check_wait_queue(lport, skb); |
85b4aa49 RL |
1499 | |
1500 | return 0; | |
1501 | } | |
85b4aa49 | 1502 | |
e7a51997 | 1503 | /** |
1875f27e RL |
1504 | * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion |
1505 | * @skb: The completed skb (argument required by destructor) | |
e7a51997 JE |
1506 | */ |
1507 | static void fcoe_percpu_flush_done(struct sk_buff *skb) | |
1508 | { | |
1509 | complete(&fcoe_flush_completion); | |
1510 | } | |
1511 | ||
52ee8321 VD |
1512 | /** |
1513 | * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC | |
1514 | * @lport: The local port the frame was received on | |
1515 | * @fp: The received frame | |
1516 | * | |
1517 | * Return: 0 on passing filtering checks | |
1518 | */ | |
1519 | static inline int fcoe_filter_frames(struct fc_lport *lport, | |
1520 | struct fc_frame *fp) | |
1521 | { | |
1522 | struct fcoe_interface *fcoe; | |
1523 | struct fc_frame_header *fh; | |
1524 | struct sk_buff *skb = (struct sk_buff *)fp; | |
1525 | struct fcoe_dev_stats *stats; | |
1526 | ||
1527 | /* | |
1528 | * We only check CRC if no offload is available and if it is | |
1529 | * it's solicited data, in which case, the FCP layer would | |
1530 | * check it during the copy. | |
1531 | */ | |
1532 | if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY) | |
1533 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; | |
1534 | else | |
1535 | fr_flags(fp) |= FCPHF_CRC_UNCHECKED; | |
1536 | ||
1537 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1538 | fh = fc_frame_header_get(fp); | |
1539 | if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP) | |
1540 | return 0; | |
1541 | ||
8597ae8b | 1542 | fcoe = ((struct fcoe_port *)lport_priv(lport))->priv; |
52ee8321 VD |
1543 | if (is_fip_mode(&fcoe->ctlr) && fc_frame_payload_op(fp) == ELS_LOGO && |
1544 | ntoh24(fh->fh_s_id) == FC_FID_FLOGI) { | |
1545 | FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n"); | |
1546 | return -EINVAL; | |
1547 | } | |
1548 | ||
f2f96d20 | 1549 | if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) || |
52ee8321 VD |
1550 | le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) { |
1551 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; | |
1552 | return 0; | |
1553 | } | |
1554 | ||
1555 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); | |
1556 | stats->InvalidCRCCount++; | |
1557 | if (stats->InvalidCRCCount < 5) | |
1558 | printk(KERN_WARNING "fcoe: dropping frame with CRC error\n"); | |
1559 | return -EINVAL; | |
1560 | } | |
1561 | ||
34f42a07 | 1562 | /** |
859b7b64 CL |
1563 | * fcoe_recv_frame() - process a single received frame |
1564 | * @skb: frame to process | |
85b4aa49 | 1565 | */ |
859b7b64 | 1566 | static void fcoe_recv_frame(struct sk_buff *skb) |
85b4aa49 | 1567 | { |
85b4aa49 | 1568 | u32 fr_len; |
1875f27e | 1569 | struct fc_lport *lport; |
85b4aa49 RL |
1570 | struct fcoe_rcv_info *fr; |
1571 | struct fcoe_dev_stats *stats; | |
85b4aa49 RL |
1572 | struct fcoe_crc_eof crc_eof; |
1573 | struct fc_frame *fp; | |
014f5c3f | 1574 | struct fcoe_port *port; |
85b4aa49 RL |
1575 | struct fcoe_hdr *hp; |
1576 | ||
859b7b64 CL |
1577 | fr = fcoe_dev_from_skb(skb); |
1578 | lport = fr->fr_dev; | |
1579 | if (unlikely(!lport)) { | |
1580 | if (skb->destructor != fcoe_percpu_flush_done) | |
1581 | FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb"); | |
1582 | kfree_skb(skb); | |
1583 | return; | |
1584 | } | |
1585 | ||
1586 | FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d " | |
1587 | "head:%p data:%p tail:%p end:%p sum:%d dev:%s", | |
1588 | skb->len, skb->data_len, | |
1589 | skb->head, skb->data, skb_tail_pointer(skb), | |
1590 | skb_end_pointer(skb), skb->csum, | |
1591 | skb->dev ? skb->dev->name : "<NULL>"); | |
1592 | ||
859b7b64 CL |
1593 | port = lport_priv(lport); |
1594 | if (skb_is_nonlinear(skb)) | |
1595 | skb_linearize(skb); /* not ideal */ | |
859b7b64 CL |
1596 | |
1597 | /* | |
1598 | * Frame length checks and setting up the header pointers | |
1599 | * was done in fcoe_rcv already. | |
1600 | */ | |
1601 | hp = (struct fcoe_hdr *) skb_network_header(skb); | |
859b7b64 | 1602 | |
f018b73a | 1603 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); |
859b7b64 CL |
1604 | if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { |
1605 | if (stats->ErrorFrames < 5) | |
1606 | printk(KERN_WARNING "fcoe: FCoE version " | |
1607 | "mismatch: The frame has " | |
1608 | "version %x, but the " | |
1609 | "initiator supports version " | |
1610 | "%x\n", FC_FCOE_DECAPS_VER(hp), | |
1611 | FC_FCOE_VER); | |
f018b73a | 1612 | goto drop; |
859b7b64 CL |
1613 | } |
1614 | ||
1615 | skb_pull(skb, sizeof(struct fcoe_hdr)); | |
1616 | fr_len = skb->len - sizeof(struct fcoe_crc_eof); | |
1617 | ||
1618 | stats->RxFrames++; | |
1619 | stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; | |
1620 | ||
1621 | fp = (struct fc_frame *)skb; | |
1622 | fc_frame_init(fp); | |
1623 | fr_dev(fp) = lport; | |
1624 | fr_sof(fp) = hp->fcoe_sof; | |
1625 | ||
1626 | /* Copy out the CRC and EOF trailer for access */ | |
f018b73a JE |
1627 | if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) |
1628 | goto drop; | |
859b7b64 CL |
1629 | fr_eof(fp) = crc_eof.fcoe_eof; |
1630 | fr_crc(fp) = crc_eof.fcoe_crc32; | |
f018b73a JE |
1631 | if (pskb_trim(skb, fr_len)) |
1632 | goto drop; | |
859b7b64 | 1633 | |
52ee8321 VD |
1634 | if (!fcoe_filter_frames(lport, fp)) { |
1635 | put_cpu(); | |
1636 | fc_exch_recv(lport, fp); | |
1637 | return; | |
859b7b64 | 1638 | } |
f018b73a JE |
1639 | drop: |
1640 | stats->ErrorFrames++; | |
1641 | put_cpu(); | |
1642 | kfree_skb(skb); | |
859b7b64 CL |
1643 | } |
1644 | ||
1645 | /** | |
1646 | * fcoe_percpu_receive_thread() - The per-CPU packet receive thread | |
1647 | * @arg: The per-CPU context | |
1648 | * | |
1649 | * Return: 0 for success | |
1650 | */ | |
1651 | int fcoe_percpu_receive_thread(void *arg) | |
1652 | { | |
1653 | struct fcoe_percpu_s *p = arg; | |
1654 | struct sk_buff *skb; | |
1655 | ||
4469c195 | 1656 | set_user_nice(current, -20); |
85b4aa49 RL |
1657 | |
1658 | while (!kthread_should_stop()) { | |
1659 | ||
1660 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1661 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) { | |
1662 | set_current_state(TASK_INTERRUPTIBLE); | |
1663 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1664 | schedule(); | |
1665 | set_current_state(TASK_RUNNING); | |
1666 | if (kthread_should_stop()) | |
1667 | return 0; | |
1668 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1669 | } | |
1670 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
859b7b64 | 1671 | fcoe_recv_frame(skb); |
85b4aa49 RL |
1672 | } |
1673 | return 0; | |
1674 | } | |
1675 | ||
85b4aa49 | 1676 | /** |
1875f27e | 1677 | * fcoe_dev_setup() - Setup the link change notification interface |
34f42a07 | 1678 | */ |
b0d428ad | 1679 | static void fcoe_dev_setup(void) |
85b4aa49 | 1680 | { |
85b4aa49 RL |
1681 | register_netdevice_notifier(&fcoe_notifier); |
1682 | } | |
1683 | ||
1684 | /** | |
1875f27e | 1685 | * fcoe_dev_cleanup() - Cleanup the link change notification interface |
34f42a07 | 1686 | */ |
85b4aa49 RL |
1687 | static void fcoe_dev_cleanup(void) |
1688 | { | |
1689 | unregister_netdevice_notifier(&fcoe_notifier); | |
1690 | } | |
1691 | ||
1692 | /** | |
1875f27e RL |
1693 | * fcoe_device_notification() - Handler for net device events |
1694 | * @notifier: The context of the notification | |
1695 | * @event: The type of event | |
1696 | * @ptr: The net device that the event was on | |
85b4aa49 | 1697 | * |
1875f27e | 1698 | * This function is called by the Ethernet driver in case of link change event. |
85b4aa49 RL |
1699 | * |
1700 | * Returns: 0 for success | |
34f42a07 | 1701 | */ |
85b4aa49 RL |
1702 | static int fcoe_device_notification(struct notifier_block *notifier, |
1703 | ulong event, void *ptr) | |
1704 | { | |
1875f27e | 1705 | struct fc_lport *lport = NULL; |
1d1b88dc | 1706 | struct net_device *netdev = ptr; |
014f5c3f | 1707 | struct fcoe_interface *fcoe; |
2e70e241 | 1708 | struct fcoe_port *port; |
85b4aa49 | 1709 | struct fcoe_dev_stats *stats; |
97c8389d | 1710 | u32 link_possible = 1; |
85b4aa49 RL |
1711 | u32 mfs; |
1712 | int rc = NOTIFY_OK; | |
1713 | ||
014f5c3f | 1714 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
25024989 | 1715 | if (fcoe->netdev == netdev) { |
1875f27e | 1716 | lport = fcoe->ctlr.lp; |
85b4aa49 RL |
1717 | break; |
1718 | } | |
1719 | } | |
1875f27e | 1720 | if (!lport) { |
85b4aa49 RL |
1721 | rc = NOTIFY_DONE; |
1722 | goto out; | |
1723 | } | |
1724 | ||
85b4aa49 RL |
1725 | switch (event) { |
1726 | case NETDEV_DOWN: | |
1727 | case NETDEV_GOING_DOWN: | |
97c8389d | 1728 | link_possible = 0; |
85b4aa49 RL |
1729 | break; |
1730 | case NETDEV_UP: | |
1731 | case NETDEV_CHANGE: | |
85b4aa49 RL |
1732 | break; |
1733 | case NETDEV_CHANGEMTU: | |
7221d7e5 YZ |
1734 | if (netdev->features & NETIF_F_FCOE_MTU) |
1735 | break; | |
1d1b88dc VD |
1736 | mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + |
1737 | sizeof(struct fcoe_crc_eof)); | |
85b4aa49 | 1738 | if (mfs >= FC_MIN_MAX_FRAME) |
1875f27e | 1739 | fc_set_mfs(lport, mfs); |
85b4aa49 RL |
1740 | break; |
1741 | case NETDEV_REGISTER: | |
1742 | break; | |
2e70e241 CL |
1743 | case NETDEV_UNREGISTER: |
1744 | list_del(&fcoe->list); | |
1745 | port = lport_priv(fcoe->ctlr.lp); | |
1746 | fcoe_interface_cleanup(fcoe); | |
2ca32b48 | 1747 | queue_work(fcoe_wq, &port->destroy_work); |
2e70e241 CL |
1748 | goto out; |
1749 | break; | |
54a5b21d YZ |
1750 | case NETDEV_FEAT_CHANGE: |
1751 | fcoe_netdev_features_change(lport, netdev); | |
1752 | break; | |
85b4aa49 | 1753 | default: |
1d1b88dc | 1754 | FCOE_NETDEV_DBG(netdev, "Unknown event %ld " |
d5488eb9 | 1755 | "from netdev netlink\n", event); |
85b4aa49 | 1756 | } |
5e4f8fe7 RL |
1757 | |
1758 | fcoe_link_speed_update(lport); | |
1759 | ||
1875f27e | 1760 | if (link_possible && !fcoe_link_ok(lport)) |
3fe9a0ba CL |
1761 | fcoe_ctlr_link_up(&fcoe->ctlr); |
1762 | else if (fcoe_ctlr_link_down(&fcoe->ctlr)) { | |
f018b73a | 1763 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); |
97c8389d | 1764 | stats->LinkFailureCount++; |
f018b73a | 1765 | put_cpu(); |
1875f27e | 1766 | fcoe_clean_pending_queue(lport); |
85b4aa49 RL |
1767 | } |
1768 | out: | |
1769 | return rc; | |
1770 | } | |
1771 | ||
55a66d3c VD |
1772 | /** |
1773 | * fcoe_disable() - Disables a FCoE interface | |
78a58246 | 1774 | * @netdev : The net_device object the Ethernet interface to create on |
55a66d3c | 1775 | * |
78a58246 | 1776 | * Called from fcoe transport. |
55a66d3c VD |
1777 | * |
1778 | * Returns: 0 for success | |
1779 | */ | |
78a58246 | 1780 | static int fcoe_disable(struct net_device *netdev) |
55a66d3c VD |
1781 | { |
1782 | struct fcoe_interface *fcoe; | |
55a66d3c VD |
1783 | int rc = 0; |
1784 | ||
1785 | mutex_lock(&fcoe_config_mutex); | |
1786 | #ifdef CONFIG_FCOE_MODULE | |
1787 | /* | |
1788 | * Make sure the module has been initialized, and is not about to be | |
1789 | * removed. Module paramter sysfs files are writable before the | |
1790 | * module_init function is called and after module_exit. | |
1791 | */ | |
1792 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
1793 | rc = -ENODEV; | |
1794 | goto out_nodev; | |
1795 | } | |
1796 | #endif | |
1797 | ||
34ce27bc | 1798 | if (!rtnl_trylock()) { |
34ce27bc | 1799 | mutex_unlock(&fcoe_config_mutex); |
78a58246 | 1800 | return -ERESTARTSYS; |
34ce27bc VD |
1801 | } |
1802 | ||
55a66d3c VD |
1803 | fcoe = fcoe_hostlist_lookup_port(netdev); |
1804 | rtnl_unlock(); | |
1805 | ||
9ee50e48 | 1806 | if (fcoe) { |
9ee50e48 | 1807 | fcoe_ctlr_link_down(&fcoe->ctlr); |
9d4cbc05 | 1808 | fcoe_clean_pending_queue(fcoe->ctlr.lp); |
9ee50e48 | 1809 | } else |
55a66d3c VD |
1810 | rc = -ENODEV; |
1811 | ||
55a66d3c VD |
1812 | out_nodev: |
1813 | mutex_unlock(&fcoe_config_mutex); | |
1814 | return rc; | |
1815 | } | |
1816 | ||
1817 | /** | |
1818 | * fcoe_enable() - Enables a FCoE interface | |
78a58246 | 1819 | * @netdev : The net_device object the Ethernet interface to create on |
55a66d3c | 1820 | * |
78a58246 | 1821 | * Called from fcoe transport. |
55a66d3c VD |
1822 | * |
1823 | * Returns: 0 for success | |
1824 | */ | |
78a58246 | 1825 | static int fcoe_enable(struct net_device *netdev) |
55a66d3c VD |
1826 | { |
1827 | struct fcoe_interface *fcoe; | |
55a66d3c VD |
1828 | int rc = 0; |
1829 | ||
1830 | mutex_lock(&fcoe_config_mutex); | |
1831 | #ifdef CONFIG_FCOE_MODULE | |
1832 | /* | |
1833 | * Make sure the module has been initialized, and is not about to be | |
1834 | * removed. Module paramter sysfs files are writable before the | |
1835 | * module_init function is called and after module_exit. | |
1836 | */ | |
1837 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
1838 | rc = -ENODEV; | |
1839 | goto out_nodev; | |
1840 | } | |
1841 | #endif | |
34ce27bc | 1842 | if (!rtnl_trylock()) { |
34ce27bc | 1843 | mutex_unlock(&fcoe_config_mutex); |
78a58246 | 1844 | return -ERESTARTSYS; |
34ce27bc VD |
1845 | } |
1846 | ||
55a66d3c VD |
1847 | fcoe = fcoe_hostlist_lookup_port(netdev); |
1848 | rtnl_unlock(); | |
1849 | ||
9d4cbc05 | 1850 | if (!fcoe) |
55a66d3c | 1851 | rc = -ENODEV; |
9d4cbc05 VD |
1852 | else if (!fcoe_link_ok(fcoe->ctlr.lp)) |
1853 | fcoe_ctlr_link_up(&fcoe->ctlr); | |
55a66d3c | 1854 | |
55a66d3c VD |
1855 | out_nodev: |
1856 | mutex_unlock(&fcoe_config_mutex); | |
1857 | return rc; | |
1858 | } | |
1859 | ||
85b4aa49 | 1860 | /** |
1875f27e | 1861 | * fcoe_destroy() - Destroy a FCoE interface |
78a58246 | 1862 | * @netdev : The net_device object the Ethernet interface to create on |
1875f27e | 1863 | * |
78a58246 | 1864 | * Called from fcoe transport |
85b4aa49 RL |
1865 | * |
1866 | * Returns: 0 for success | |
34f42a07 | 1867 | */ |
78a58246 | 1868 | static int fcoe_destroy(struct net_device *netdev) |
85b4aa49 | 1869 | { |
030f4e00 | 1870 | struct fcoe_interface *fcoe; |
8eca355f | 1871 | int rc = 0; |
85b4aa49 | 1872 | |
dfc1d0fe CL |
1873 | mutex_lock(&fcoe_config_mutex); |
1874 | #ifdef CONFIG_FCOE_MODULE | |
1875 | /* | |
1876 | * Make sure the module has been initialized, and is not about to be | |
1877 | * removed. Module paramter sysfs files are writable before the | |
1878 | * module_init function is called and after module_exit. | |
1879 | */ | |
1880 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
1881 | rc = -ENODEV; | |
1882 | goto out_nodev; | |
1883 | } | |
1884 | #endif | |
34ce27bc | 1885 | if (!rtnl_trylock()) { |
34ce27bc | 1886 | mutex_unlock(&fcoe_config_mutex); |
78a58246 | 1887 | return -ERESTARTSYS; |
34ce27bc VD |
1888 | } |
1889 | ||
2e70e241 CL |
1890 | fcoe = fcoe_hostlist_lookup_port(netdev); |
1891 | if (!fcoe) { | |
090eb6c4 | 1892 | rtnl_unlock(); |
85b4aa49 | 1893 | rc = -ENODEV; |
78a58246 | 1894 | goto out_nodev; |
85b4aa49 | 1895 | } |
2e70e241 | 1896 | fcoe_interface_cleanup(fcoe); |
54a5b21d | 1897 | list_del(&fcoe->list); |
34ce27bc | 1898 | /* RTNL mutex is dropped by fcoe_if_destroy */ |
2e70e241 | 1899 | fcoe_if_destroy(fcoe->ctlr.lp); |
85b4aa49 | 1900 | out_nodev: |
dfc1d0fe | 1901 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 RL |
1902 | return rc; |
1903 | } | |
1904 | ||
1875f27e RL |
1905 | /** |
1906 | * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context | |
1907 | * @work: Handle to the FCoE port to be destroyed | |
1908 | */ | |
2e70e241 CL |
1909 | static void fcoe_destroy_work(struct work_struct *work) |
1910 | { | |
1911 | struct fcoe_port *port; | |
1912 | ||
1913 | port = container_of(work, struct fcoe_port, destroy_work); | |
1914 | mutex_lock(&fcoe_config_mutex); | |
34ce27bc VD |
1915 | rtnl_lock(); |
1916 | /* RTNL mutex is dropped by fcoe_if_destroy */ | |
2e70e241 CL |
1917 | fcoe_if_destroy(port->lport); |
1918 | mutex_unlock(&fcoe_config_mutex); | |
1919 | } | |
1920 | ||
78a58246 YZ |
1921 | /** |
1922 | * fcoe_match() - Check if the FCoE is supported on the given netdevice | |
1923 | * @netdev : The net_device object the Ethernet interface to create on | |
1924 | * | |
1925 | * Called from fcoe transport. | |
1926 | * | |
1927 | * Returns: always returns true as this is the default FCoE transport, | |
1928 | * i.e., support all netdevs. | |
1929 | */ | |
1930 | static bool fcoe_match(struct net_device *netdev) | |
1931 | { | |
1932 | return true; | |
1933 | } | |
1934 | ||
85b4aa49 | 1935 | /** |
1875f27e | 1936 | * fcoe_create() - Create a fcoe interface |
78a58246 YZ |
1937 | * @netdev : The net_device object the Ethernet interface to create on |
1938 | * @fip_mode: The FIP mode for this creation | |
1875f27e | 1939 | * |
78a58246 | 1940 | * Called from fcoe transport |
85b4aa49 RL |
1941 | * |
1942 | * Returns: 0 for success | |
34f42a07 | 1943 | */ |
78a58246 | 1944 | static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode) |
85b4aa49 RL |
1945 | { |
1946 | int rc; | |
030f4e00 | 1947 | struct fcoe_interface *fcoe; |
af7f85d9 | 1948 | struct fc_lport *lport; |
85b4aa49 | 1949 | |
dfc1d0fe | 1950 | mutex_lock(&fcoe_config_mutex); |
34ce27bc VD |
1951 | |
1952 | if (!rtnl_trylock()) { | |
1953 | mutex_unlock(&fcoe_config_mutex); | |
78a58246 | 1954 | return -ERESTARTSYS; |
34ce27bc VD |
1955 | } |
1956 | ||
dfc1d0fe CL |
1957 | #ifdef CONFIG_FCOE_MODULE |
1958 | /* | |
1959 | * Make sure the module has been initialized, and is not about to be | |
1960 | * removed. Module paramter sysfs files are writable before the | |
1961 | * module_init function is called and after module_exit. | |
1962 | */ | |
1963 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
85b4aa49 RL |
1964 | rc = -ENODEV; |
1965 | goto out_nodev; | |
1966 | } | |
dfc1d0fe | 1967 | #endif |
2e70e241 | 1968 | |
85b4aa49 RL |
1969 | /* look for existing lport */ |
1970 | if (fcoe_hostlist_lookup(netdev)) { | |
1971 | rc = -EEXIST; | |
78a58246 | 1972 | goto out_nodev; |
85b4aa49 | 1973 | } |
85b4aa49 | 1974 | |
1dd454d9 | 1975 | fcoe = fcoe_interface_create(netdev, fip_mode); |
7287fb91 RL |
1976 | if (IS_ERR(fcoe)) { |
1977 | rc = PTR_ERR(fcoe); | |
78a58246 | 1978 | goto out_nodev; |
030f4e00 CL |
1979 | } |
1980 | ||
9a05753b | 1981 | lport = fcoe_if_create(fcoe, &netdev->dev, 0); |
af7f85d9 | 1982 | if (IS_ERR(lport)) { |
d5488eb9 | 1983 | printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", |
85b4aa49 | 1984 | netdev->name); |
85b4aa49 | 1985 | rc = -EIO; |
2e70e241 | 1986 | fcoe_interface_cleanup(fcoe); |
030f4e00 | 1987 | goto out_free; |
85b4aa49 | 1988 | } |
030f4e00 | 1989 | |
54b649f8 CL |
1990 | /* Make this the "master" N_Port */ |
1991 | fcoe->ctlr.lp = lport; | |
1992 | ||
c863df33 CL |
1993 | /* add to lports list */ |
1994 | fcoe_hostlist_add(lport); | |
1995 | ||
54b649f8 CL |
1996 | /* start FIP Discovery and FLOGI */ |
1997 | lport->boot_time = jiffies; | |
1998 | fc_fabric_login(lport); | |
1999 | if (!fcoe_link_ok(lport)) | |
2000 | fcoe_ctlr_link_up(&fcoe->ctlr); | |
030f4e00 | 2001 | |
54b649f8 CL |
2002 | /* |
2003 | * Release from init in fcoe_interface_create(), on success lport | |
2004 | * should be holding a reference taken in fcoe_if_create(). | |
2005 | */ | |
030f4e00 | 2006 | fcoe_interface_put(fcoe); |
6409ea65 RL |
2007 | rtnl_unlock(); |
2008 | mutex_unlock(&fcoe_config_mutex); | |
2009 | ||
2010 | return 0; | |
2011 | out_free: | |
2012 | fcoe_interface_put(fcoe); | |
85b4aa49 | 2013 | out_nodev: |
34ce27bc | 2014 | rtnl_unlock(); |
dfc1d0fe | 2015 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 RL |
2016 | return rc; |
2017 | } | |
2018 | ||
34f42a07 | 2019 | /** |
5e4f8fe7 RL |
2020 | * fcoe_link_speed_update() - Update the supported and actual link speeds |
2021 | * @lport: The local port to update speeds for | |
85b4aa49 | 2022 | * |
5e4f8fe7 RL |
2023 | * Returns: 0 if the ethtool query was successful |
2024 | * -1 if the ethtool query failed | |
85b4aa49 | 2025 | */ |
5e4f8fe7 | 2026 | int fcoe_link_speed_update(struct fc_lport *lport) |
85b4aa49 | 2027 | { |
8597ae8b | 2028 | struct net_device *netdev = fcoe_netdev(lport); |
85b4aa49 | 2029 | struct ethtool_cmd ecmd = { ETHTOOL_GSET }; |
85b4aa49 | 2030 | |
5e4f8fe7 | 2031 | if (!dev_ethtool_get_settings(netdev, &ecmd)) { |
1875f27e | 2032 | lport->link_supported_speeds &= |
2f718d64 YZ |
2033 | ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT); |
2034 | if (ecmd.supported & (SUPPORTED_1000baseT_Half | | |
2035 | SUPPORTED_1000baseT_Full)) | |
1875f27e | 2036 | lport->link_supported_speeds |= FC_PORTSPEED_1GBIT; |
2f718d64 | 2037 | if (ecmd.supported & SUPPORTED_10000baseT_Full) |
1875f27e | 2038 | lport->link_supported_speeds |= |
2f718d64 YZ |
2039 | FC_PORTSPEED_10GBIT; |
2040 | if (ecmd.speed == SPEED_1000) | |
1875f27e | 2041 | lport->link_speed = FC_PORTSPEED_1GBIT; |
2f718d64 | 2042 | if (ecmd.speed == SPEED_10000) |
1875f27e | 2043 | lport->link_speed = FC_PORTSPEED_10GBIT; |
85b4aa49 | 2044 | |
2f718d64 YZ |
2045 | return 0; |
2046 | } | |
2047 | return -1; | |
85b4aa49 | 2048 | } |
85b4aa49 | 2049 | |
5e4f8fe7 RL |
2050 | /** |
2051 | * fcoe_link_ok() - Check if the link is OK for a local port | |
2052 | * @lport: The local port to check link on | |
2053 | * | |
2054 | * Returns: 0 if link is UP and OK, -1 if not | |
2055 | * | |
2056 | */ | |
2057 | int fcoe_link_ok(struct fc_lport *lport) | |
2058 | { | |
8597ae8b | 2059 | struct net_device *netdev = fcoe_netdev(lport); |
5e4f8fe7 RL |
2060 | |
2061 | if (netif_oper_up(netdev)) | |
2062 | return 0; | |
2063 | return -1; | |
2064 | } | |
2065 | ||
34f42a07 | 2066 | /** |
1875f27e RL |
2067 | * fcoe_percpu_clean() - Clear all pending skbs for an local port |
2068 | * @lport: The local port whose skbs are to be cleared | |
e7a51997 JE |
2069 | * |
2070 | * Must be called with fcoe_create_mutex held to single-thread completion. | |
2071 | * | |
2072 | * This flushes the pending skbs by adding a new skb to each queue and | |
2073 | * waiting until they are all freed. This assures us that not only are | |
2074 | * there no packets that will be handled by the lport, but also that any | |
2075 | * threads already handling packet have returned. | |
85b4aa49 | 2076 | */ |
1875f27e | 2077 | void fcoe_percpu_clean(struct fc_lport *lport) |
85b4aa49 | 2078 | { |
85b4aa49 RL |
2079 | struct fcoe_percpu_s *pp; |
2080 | struct fcoe_rcv_info *fr; | |
2081 | struct sk_buff_head *list; | |
2082 | struct sk_buff *skb, *next; | |
2083 | struct sk_buff *head; | |
5e5e92df | 2084 | unsigned int cpu; |
85b4aa49 | 2085 | |
5e5e92df RL |
2086 | for_each_possible_cpu(cpu) { |
2087 | pp = &per_cpu(fcoe_percpu, cpu); | |
2088 | spin_lock_bh(&pp->fcoe_rx_list.lock); | |
2089 | list = &pp->fcoe_rx_list; | |
2090 | head = list->next; | |
2091 | for (skb = head; skb != (struct sk_buff *)list; | |
2092 | skb = next) { | |
2093 | next = skb->next; | |
2094 | fr = fcoe_dev_from_skb(skb); | |
1875f27e | 2095 | if (fr->fr_dev == lport) { |
5e5e92df RL |
2096 | __skb_unlink(skb, list); |
2097 | kfree_skb(skb); | |
85b4aa49 | 2098 | } |
85b4aa49 | 2099 | } |
e7a51997 JE |
2100 | |
2101 | if (!pp->thread || !cpu_online(cpu)) { | |
2102 | spin_unlock_bh(&pp->fcoe_rx_list.lock); | |
2103 | continue; | |
2104 | } | |
2105 | ||
2106 | skb = dev_alloc_skb(0); | |
2107 | if (!skb) { | |
2108 | spin_unlock_bh(&pp->fcoe_rx_list.lock); | |
2109 | continue; | |
2110 | } | |
2111 | skb->destructor = fcoe_percpu_flush_done; | |
2112 | ||
2113 | __skb_queue_tail(&pp->fcoe_rx_list, skb); | |
2114 | if (pp->fcoe_rx_list.qlen == 1) | |
2115 | wake_up_process(pp->thread); | |
5e5e92df | 2116 | spin_unlock_bh(&pp->fcoe_rx_list.lock); |
e7a51997 JE |
2117 | |
2118 | wait_for_completion(&fcoe_flush_completion); | |
85b4aa49 RL |
2119 | } |
2120 | } | |
85b4aa49 | 2121 | |
34f42a07 | 2122 | /** |
1875f27e RL |
2123 | * fcoe_reset() - Reset a local port |
2124 | * @shost: The SCSI host associated with the local port to be reset | |
85b4aa49 | 2125 | * |
1875f27e | 2126 | * Returns: Always 0 (return value required by FC transport template) |
85b4aa49 RL |
2127 | */ |
2128 | int fcoe_reset(struct Scsi_Host *shost) | |
2129 | { | |
2130 | struct fc_lport *lport = shost_priv(shost); | |
d2f80952 VD |
2131 | struct fcoe_port *port = lport_priv(lport); |
2132 | struct fcoe_interface *fcoe = port->priv; | |
2133 | ||
2134 | fcoe_ctlr_link_down(&fcoe->ctlr); | |
2135 | fcoe_clean_pending_queue(fcoe->ctlr.lp); | |
2136 | if (!fcoe_link_ok(fcoe->ctlr.lp)) | |
2137 | fcoe_ctlr_link_up(&fcoe->ctlr); | |
85b4aa49 RL |
2138 | return 0; |
2139 | } | |
85b4aa49 | 2140 | |
34f42a07 | 2141 | /** |
1875f27e RL |
2142 | * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device |
2143 | * @netdev: The net device used as a key | |
85b4aa49 | 2144 | * |
1875f27e RL |
2145 | * Locking: Must be called with the RNL mutex held. |
2146 | * | |
2147 | * Returns: NULL or the FCoE interface | |
85b4aa49 | 2148 | */ |
014f5c3f | 2149 | static struct fcoe_interface * |
1875f27e | 2150 | fcoe_hostlist_lookup_port(const struct net_device *netdev) |
85b4aa49 | 2151 | { |
014f5c3f | 2152 | struct fcoe_interface *fcoe; |
85b4aa49 | 2153 | |
014f5c3f | 2154 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
1875f27e | 2155 | if (fcoe->netdev == netdev) |
014f5c3f | 2156 | return fcoe; |
85b4aa49 | 2157 | } |
85b4aa49 RL |
2158 | return NULL; |
2159 | } | |
2160 | ||
34f42a07 | 2161 | /** |
1875f27e RL |
2162 | * fcoe_hostlist_lookup() - Find the local port associated with a |
2163 | * given net device | |
2164 | * @netdev: The netdevice used as a key | |
85b4aa49 | 2165 | * |
1875f27e RL |
2166 | * Locking: Must be called with the RTNL mutex held |
2167 | * | |
2168 | * Returns: NULL or the local port | |
85b4aa49 | 2169 | */ |
090eb6c4 | 2170 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) |
85b4aa49 | 2171 | { |
014f5c3f | 2172 | struct fcoe_interface *fcoe; |
85b4aa49 | 2173 | |
014f5c3f | 2174 | fcoe = fcoe_hostlist_lookup_port(netdev); |
3fe9a0ba | 2175 | return (fcoe) ? fcoe->ctlr.lp : NULL; |
85b4aa49 | 2176 | } |
85b4aa49 | 2177 | |
34f42a07 | 2178 | /** |
1875f27e RL |
2179 | * fcoe_hostlist_add() - Add the FCoE interface identified by a local |
2180 | * port to the hostlist | |
2181 | * @lport: The local port that identifies the FCoE interface to be added | |
85b4aa49 | 2182 | * |
090eb6c4 | 2183 | * Locking: must be called with the RTNL mutex held |
1875f27e RL |
2184 | * |
2185 | * Returns: 0 for success | |
85b4aa49 | 2186 | */ |
090eb6c4 | 2187 | static int fcoe_hostlist_add(const struct fc_lport *lport) |
85b4aa49 | 2188 | { |
014f5c3f CL |
2189 | struct fcoe_interface *fcoe; |
2190 | struct fcoe_port *port; | |
2191 | ||
2192 | fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); | |
2193 | if (!fcoe) { | |
2194 | port = lport_priv(lport); | |
8597ae8b | 2195 | fcoe = port->priv; |
014f5c3f | 2196 | list_add_tail(&fcoe->list, &fcoe_hostlist); |
85b4aa49 RL |
2197 | } |
2198 | return 0; | |
2199 | } | |
85b4aa49 | 2200 | |
78a58246 YZ |
2201 | |
2202 | static struct fcoe_transport fcoe_sw_transport = { | |
2203 | .name = {FCOE_TRANSPORT_DEFAULT}, | |
2204 | .attached = false, | |
2205 | .list = LIST_HEAD_INIT(fcoe_sw_transport.list), | |
2206 | .match = fcoe_match, | |
2207 | .create = fcoe_create, | |
2208 | .destroy = fcoe_destroy, | |
2209 | .enable = fcoe_enable, | |
2210 | .disable = fcoe_disable, | |
2211 | }; | |
2212 | ||
85b4aa49 | 2213 | /** |
1875f27e | 2214 | * fcoe_init() - Initialize fcoe.ko |
85b4aa49 | 2215 | * |
1875f27e | 2216 | * Returns: 0 on success, or a negative value on failure |
34f42a07 | 2217 | */ |
85b4aa49 RL |
2218 | static int __init fcoe_init(void) |
2219 | { | |
1875f27e | 2220 | struct fcoe_percpu_s *p; |
38eccabd | 2221 | unsigned int cpu; |
8976f424 | 2222 | int rc = 0; |
85b4aa49 | 2223 | |
2ca32b48 TH |
2224 | fcoe_wq = alloc_workqueue("fcoe", 0, 0); |
2225 | if (!fcoe_wq) | |
2226 | return -ENOMEM; | |
2227 | ||
78a58246 YZ |
2228 | /* register as a fcoe transport */ |
2229 | rc = fcoe_transport_attach(&fcoe_sw_transport); | |
2230 | if (rc) { | |
2231 | printk(KERN_ERR "failed to register an fcoe transport, check " | |
2232 | "if libfcoe is loaded\n"); | |
2233 | return rc; | |
2234 | } | |
2235 | ||
dfc1d0fe CL |
2236 | mutex_lock(&fcoe_config_mutex); |
2237 | ||
38eccabd | 2238 | for_each_possible_cpu(cpu) { |
5e5e92df | 2239 | p = &per_cpu(fcoe_percpu, cpu); |
38eccabd RL |
2240 | skb_queue_head_init(&p->fcoe_rx_list); |
2241 | } | |
2242 | ||
8976f424 RL |
2243 | for_each_online_cpu(cpu) |
2244 | fcoe_percpu_thread_create(cpu); | |
85b4aa49 | 2245 | |
8976f424 RL |
2246 | /* Initialize per CPU interrupt thread */ |
2247 | rc = register_hotcpu_notifier(&fcoe_cpu_notifier); | |
2248 | if (rc) | |
2249 | goto out_free; | |
85b4aa49 | 2250 | |
8976f424 | 2251 | /* Setup link change notification */ |
85b4aa49 RL |
2252 | fcoe_dev_setup(); |
2253 | ||
5892c32f CL |
2254 | rc = fcoe_if_init(); |
2255 | if (rc) | |
2256 | goto out_free; | |
85b4aa49 | 2257 | |
dfc1d0fe | 2258 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 | 2259 | return 0; |
8976f424 RL |
2260 | |
2261 | out_free: | |
2262 | for_each_online_cpu(cpu) { | |
2263 | fcoe_percpu_thread_destroy(cpu); | |
2264 | } | |
dfc1d0fe | 2265 | mutex_unlock(&fcoe_config_mutex); |
2ca32b48 | 2266 | destroy_workqueue(fcoe_wq); |
8976f424 | 2267 | return rc; |
85b4aa49 RL |
2268 | } |
2269 | module_init(fcoe_init); | |
2270 | ||
2271 | /** | |
1875f27e | 2272 | * fcoe_exit() - Clean up fcoe.ko |
85b4aa49 | 2273 | * |
1875f27e | 2274 | * Returns: 0 on success or a negative value on failure |
34f42a07 | 2275 | */ |
85b4aa49 RL |
2276 | static void __exit fcoe_exit(void) |
2277 | { | |
014f5c3f | 2278 | struct fcoe_interface *fcoe, *tmp; |
2e70e241 | 2279 | struct fcoe_port *port; |
1875f27e | 2280 | unsigned int cpu; |
85b4aa49 | 2281 | |
dfc1d0fe CL |
2282 | mutex_lock(&fcoe_config_mutex); |
2283 | ||
85b4aa49 RL |
2284 | fcoe_dev_cleanup(); |
2285 | ||
5919a595 | 2286 | /* releases the associated fcoe hosts */ |
090eb6c4 CL |
2287 | rtnl_lock(); |
2288 | list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { | |
c863df33 | 2289 | list_del(&fcoe->list); |
2e70e241 | 2290 | port = lport_priv(fcoe->ctlr.lp); |
2e70e241 | 2291 | fcoe_interface_cleanup(fcoe); |
2ca32b48 | 2292 | queue_work(fcoe_wq, &port->destroy_work); |
c863df33 | 2293 | } |
090eb6c4 | 2294 | rtnl_unlock(); |
85b4aa49 | 2295 | |
8976f424 RL |
2296 | unregister_hotcpu_notifier(&fcoe_cpu_notifier); |
2297 | ||
014f5c3f | 2298 | for_each_online_cpu(cpu) |
8976f424 | 2299 | fcoe_percpu_thread_destroy(cpu); |
85b4aa49 | 2300 | |
dfc1d0fe | 2301 | mutex_unlock(&fcoe_config_mutex); |
2e70e241 | 2302 | |
2ca32b48 TH |
2303 | /* |
2304 | * destroy_work's may be chained but destroy_workqueue() | |
2305 | * can take care of them. Just kill the fcoe_wq. | |
2306 | */ | |
2307 | destroy_workqueue(fcoe_wq); | |
2e70e241 | 2308 | |
2ca32b48 TH |
2309 | /* |
2310 | * Detaching from the scsi transport must happen after all | |
2311 | * destroys are done on the fcoe_wq. destroy_workqueue will | |
2312 | * enusre the fcoe_wq is flushed. | |
2313 | */ | |
2e70e241 | 2314 | fcoe_if_exit(); |
78a58246 YZ |
2315 | |
2316 | /* detach from fcoe transport */ | |
2317 | fcoe_transport_detach(&fcoe_sw_transport); | |
85b4aa49 RL |
2318 | } |
2319 | module_exit(fcoe_exit); | |
11b56188 CL |
2320 | |
2321 | /** | |
2322 | * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler | |
2323 | * @seq: active sequence in the FLOGI or FDISC exchange | |
2324 | * @fp: response frame, or error encoded in a pointer (timeout) | |
2325 | * @arg: pointer the the fcoe_ctlr structure | |
2326 | * | |
65155b37 | 2327 | * This handles MAC address management for FCoE, then passes control on to |
11b56188 CL |
2328 | * the libfc FLOGI response handler. |
2329 | */ | |
2330 | static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) | |
2331 | { | |
2332 | struct fcoe_ctlr *fip = arg; | |
2333 | struct fc_exch *exch = fc_seq_exch(seq); | |
2334 | struct fc_lport *lport = exch->lp; | |
2335 | u8 *mac; | |
2336 | ||
2337 | if (IS_ERR(fp)) | |
2338 | goto done; | |
2339 | ||
2340 | mac = fr_cb(fp)->granted_mac; | |
2341 | if (is_zero_ether_addr(mac)) { | |
2342 | /* pre-FIP */ | |
386309ce | 2343 | if (fcoe_ctlr_recv_flogi(fip, lport, fp)) { |
11b56188 CL |
2344 | fc_frame_free(fp); |
2345 | return; | |
2346 | } | |
11b56188 | 2347 | } |
386309ce | 2348 | fcoe_update_src_mac(lport, mac); |
11b56188 CL |
2349 | done: |
2350 | fc_lport_flogi_resp(seq, fp, lport); | |
2351 | } | |
2352 | ||
2353 | /** | |
2354 | * fcoe_logo_resp() - FCoE specific LOGO response handler | |
2355 | * @seq: active sequence in the LOGO exchange | |
2356 | * @fp: response frame, or error encoded in a pointer (timeout) | |
2357 | * @arg: pointer the the fcoe_ctlr structure | |
2358 | * | |
65155b37 | 2359 | * This handles MAC address management for FCoE, then passes control on to |
11b56188 CL |
2360 | * the libfc LOGO response handler. |
2361 | */ | |
2362 | static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) | |
2363 | { | |
386309ce | 2364 | struct fc_lport *lport = arg; |
11b56188 CL |
2365 | static u8 zero_mac[ETH_ALEN] = { 0 }; |
2366 | ||
2367 | if (!IS_ERR(fp)) | |
386309ce | 2368 | fcoe_update_src_mac(lport, zero_mac); |
11b56188 CL |
2369 | fc_lport_logo_resp(seq, fp, lport); |
2370 | } | |
2371 | ||
2372 | /** | |
2373 | * fcoe_elsct_send - FCoE specific ELS handler | |
2374 | * | |
2375 | * This does special case handling of FIP encapsualted ELS exchanges for FCoE, | |
2376 | * using FCoE specific response handlers and passing the FIP controller as | |
2377 | * the argument (the lport is still available from the exchange). | |
2378 | * | |
2379 | * Most of the work here is just handed off to the libfc routine. | |
2380 | */ | |
1875f27e RL |
2381 | static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, |
2382 | struct fc_frame *fp, unsigned int op, | |
2383 | void (*resp)(struct fc_seq *, | |
2384 | struct fc_frame *, | |
2385 | void *), | |
2386 | void *arg, u32 timeout) | |
11b56188 CL |
2387 | { |
2388 | struct fcoe_port *port = lport_priv(lport); | |
8597ae8b | 2389 | struct fcoe_interface *fcoe = port->priv; |
11b56188 CL |
2390 | struct fcoe_ctlr *fip = &fcoe->ctlr; |
2391 | struct fc_frame_header *fh = fc_frame_header_get(fp); | |
2392 | ||
2393 | switch (op) { | |
2394 | case ELS_FLOGI: | |
2395 | case ELS_FDISC: | |
e10f8c66 JE |
2396 | if (lport->point_to_multipoint) |
2397 | break; | |
11b56188 CL |
2398 | return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, |
2399 | fip, timeout); | |
2400 | case ELS_LOGO: | |
2401 | /* only hook onto fabric logouts, not port logouts */ | |
2402 | if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) | |
2403 | break; | |
2404 | return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, | |
386309ce | 2405 | lport, timeout); |
11b56188 CL |
2406 | } |
2407 | return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); | |
2408 | } | |
2409 | ||
9a05753b CL |
2410 | /** |
2411 | * fcoe_vport_create() - create an fc_host/scsi_host for a vport | |
2412 | * @vport: fc_vport object to create a new fc_host for | |
2413 | * @disabled: start the new fc_host in a disabled state by default? | |
2414 | * | |
2415 | * Returns: 0 for success | |
2416 | */ | |
2417 | static int fcoe_vport_create(struct fc_vport *vport, bool disabled) | |
2418 | { | |
2419 | struct Scsi_Host *shost = vport_to_shost(vport); | |
2420 | struct fc_lport *n_port = shost_priv(shost); | |
2421 | struct fcoe_port *port = lport_priv(n_port); | |
8597ae8b | 2422 | struct fcoe_interface *fcoe = port->priv; |
9a05753b CL |
2423 | struct net_device *netdev = fcoe->netdev; |
2424 | struct fc_lport *vn_port; | |
2425 | ||
2426 | mutex_lock(&fcoe_config_mutex); | |
2427 | vn_port = fcoe_if_create(fcoe, &vport->dev, 1); | |
2428 | mutex_unlock(&fcoe_config_mutex); | |
2429 | ||
2430 | if (IS_ERR(vn_port)) { | |
2431 | printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", | |
2432 | netdev->name); | |
2433 | return -EIO; | |
2434 | } | |
2435 | ||
2436 | if (disabled) { | |
2437 | fc_vport_set_state(vport, FC_VPORT_DISABLED); | |
2438 | } else { | |
2439 | vn_port->boot_time = jiffies; | |
2440 | fc_fabric_login(vn_port); | |
2441 | fc_vport_setlink(vn_port); | |
2442 | } | |
2443 | return 0; | |
2444 | } | |
2445 | ||
2446 | /** | |
2447 | * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport | |
2448 | * @vport: fc_vport object that is being destroyed | |
2449 | * | |
2450 | * Returns: 0 for success | |
2451 | */ | |
2452 | static int fcoe_vport_destroy(struct fc_vport *vport) | |
2453 | { | |
2454 | struct Scsi_Host *shost = vport_to_shost(vport); | |
2455 | struct fc_lport *n_port = shost_priv(shost); | |
2456 | struct fc_lport *vn_port = vport->dd_data; | |
2457 | struct fcoe_port *port = lport_priv(vn_port); | |
2458 | ||
2459 | mutex_lock(&n_port->lp_mutex); | |
2460 | list_del(&vn_port->list); | |
2461 | mutex_unlock(&n_port->lp_mutex); | |
2ca32b48 | 2462 | queue_work(fcoe_wq, &port->destroy_work); |
9a05753b CL |
2463 | return 0; |
2464 | } | |
2465 | ||
2466 | /** | |
2467 | * fcoe_vport_disable() - change vport state | |
2468 | * @vport: vport to bring online/offline | |
2469 | * @disable: should the vport be disabled? | |
2470 | */ | |
2471 | static int fcoe_vport_disable(struct fc_vport *vport, bool disable) | |
2472 | { | |
2473 | struct fc_lport *lport = vport->dd_data; | |
2474 | ||
2475 | if (disable) { | |
2476 | fc_vport_set_state(vport, FC_VPORT_DISABLED); | |
2477 | fc_fabric_logoff(lport); | |
2478 | } else { | |
2479 | lport->boot_time = jiffies; | |
2480 | fc_fabric_login(lport); | |
2481 | fc_vport_setlink(lport); | |
2482 | } | |
2483 | ||
2484 | return 0; | |
2485 | } | |
2486 | ||
dc8596d3 CL |
2487 | /** |
2488 | * fcoe_vport_set_symbolic_name() - append vport string to symbolic name | |
2489 | * @vport: fc_vport with a new symbolic name string | |
2490 | * | |
2491 | * After generating a new symbolic name string, a new RSPN_ID request is | |
2492 | * sent to the name server. There is no response handler, so if it fails | |
2493 | * for some reason it will not be retried. | |
2494 | */ | |
2495 | static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) | |
2496 | { | |
2497 | struct fc_lport *lport = vport->dd_data; | |
2498 | struct fc_frame *fp; | |
2499 | size_t len; | |
2500 | ||
2501 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, | |
2502 | "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, | |
2503 | fcoe_netdev(lport)->name, vport->symbolic_name); | |
2504 | ||
2505 | if (lport->state != LPORT_ST_READY) | |
2506 | return; | |
2507 | ||
2508 | len = strnlen(fc_host_symbolic_name(lport->host), 255); | |
2509 | fp = fc_frame_alloc(lport, | |
2510 | sizeof(struct fc_ct_hdr) + | |
2511 | sizeof(struct fc_ns_rspn) + len); | |
2512 | if (!fp) | |
2513 | return; | |
2514 | lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, | |
b94f8951 | 2515 | NULL, NULL, 3 * lport->r_a_tov); |
dc8596d3 | 2516 | } |
b84056bf YZ |
2517 | |
2518 | /** | |
2519 | * fcoe_get_lesb() - Fill the FCoE Link Error Status Block | |
2520 | * @lport: the local port | |
2521 | * @fc_lesb: the link error status block | |
2522 | */ | |
2523 | static void fcoe_get_lesb(struct fc_lport *lport, | |
2524 | struct fc_els_lesb *fc_lesb) | |
2525 | { | |
2526 | unsigned int cpu; | |
2527 | u32 lfc, vlfc, mdac; | |
2528 | struct fcoe_dev_stats *devst; | |
2529 | struct fcoe_fc_els_lesb *lesb; | |
28172739 | 2530 | struct rtnl_link_stats64 temp; |
b84056bf YZ |
2531 | struct net_device *netdev = fcoe_netdev(lport); |
2532 | ||
2533 | lfc = 0; | |
2534 | vlfc = 0; | |
2535 | mdac = 0; | |
2536 | lesb = (struct fcoe_fc_els_lesb *)fc_lesb; | |
2537 | memset(lesb, 0, sizeof(*lesb)); | |
2538 | for_each_possible_cpu(cpu) { | |
2539 | devst = per_cpu_ptr(lport->dev_stats, cpu); | |
2540 | lfc += devst->LinkFailureCount; | |
2541 | vlfc += devst->VLinkFailureCount; | |
2542 | mdac += devst->MissDiscAdvCount; | |
2543 | } | |
2544 | lesb->lesb_link_fail = htonl(lfc); | |
2545 | lesb->lesb_vlink_fail = htonl(vlfc); | |
2546 | lesb->lesb_miss_fka = htonl(mdac); | |
28172739 | 2547 | lesb->lesb_fcs_error = htonl(dev_get_stats(netdev, &temp)->rx_crc_errors); |
b84056bf | 2548 | } |
7d65b0df JE |
2549 | |
2550 | /** | |
2551 | * fcoe_set_port_id() - Callback from libfc when Port_ID is set. | |
2552 | * @lport: the local port | |
2553 | * @port_id: the port ID | |
2554 | * @fp: the received frame, if any, that caused the port_id to be set. | |
2555 | * | |
2556 | * This routine handles the case where we received a FLOGI and are | |
2557 | * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi() | |
2558 | * so it can set the non-mapped mode and gateway address. | |
2559 | * | |
2560 | * The FLOGI LS_ACC is handled by fcoe_flogi_resp(). | |
2561 | */ | |
2562 | static void fcoe_set_port_id(struct fc_lport *lport, | |
2563 | u32 port_id, struct fc_frame *fp) | |
2564 | { | |
2565 | struct fcoe_port *port = lport_priv(lport); | |
8597ae8b | 2566 | struct fcoe_interface *fcoe = port->priv; |
7d65b0df JE |
2567 | |
2568 | if (fp && fc_frame_payload_op(fp) == ELS_FLOGI) | |
2569 | fcoe_ctlr_recv_flogi(&fcoe->ctlr, lport, fp); | |
2570 | } |