Commit | Line | Data |
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85b4aa49 | 1 | /* |
af7f85d9 | 2 | * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved. |
85b4aa49 RL |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | * | |
17 | * Maintained at www.Open-FCoE.org | |
18 | */ | |
19 | ||
20 | #include <linux/module.h> | |
85b4aa49 | 21 | #include <linux/spinlock.h> |
85b4aa49 RL |
22 | #include <linux/netdevice.h> |
23 | #include <linux/etherdevice.h> | |
24 | #include <linux/ethtool.h> | |
25 | #include <linux/if_ether.h> | |
26 | #include <linux/if_vlan.h> | |
85b4aa49 | 27 | #include <linux/crc32.h> |
5a0e3ad6 | 28 | #include <linux/slab.h> |
85b4aa49 RL |
29 | #include <linux/cpu.h> |
30 | #include <linux/fs.h> | |
31 | #include <linux/sysfs.h> | |
32 | #include <linux/ctype.h> | |
2ca32b48 | 33 | #include <linux/workqueue.h> |
85b4aa49 RL |
34 | #include <scsi/scsi_tcq.h> |
35 | #include <scsi/scsicam.h> | |
36 | #include <scsi/scsi_transport.h> | |
37 | #include <scsi/scsi_transport_fc.h> | |
38 | #include <net/rtnetlink.h> | |
39 | ||
40 | #include <scsi/fc/fc_encaps.h> | |
97c8389d | 41 | #include <scsi/fc/fc_fip.h> |
85b4aa49 RL |
42 | |
43 | #include <scsi/libfc.h> | |
44 | #include <scsi/fc_frame.h> | |
45 | #include <scsi/libfcoe.h> | |
85b4aa49 | 46 | |
fdd78027 | 47 | #include "fcoe.h" |
7f349142 | 48 | |
85b4aa49 RL |
49 | MODULE_AUTHOR("Open-FCoE.org"); |
50 | MODULE_DESCRIPTION("FCoE"); | |
9b34ecff | 51 | MODULE_LICENSE("GPL v2"); |
85b4aa49 | 52 | |
05cc7390 YZ |
53 | /* Performance tuning parameters for fcoe */ |
54 | static unsigned int fcoe_ddp_min; | |
55 | module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR); | |
56 | MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \ | |
57 | "Direct Data Placement (DDP)."); | |
58 | ||
dfc1d0fe CL |
59 | DEFINE_MUTEX(fcoe_config_mutex); |
60 | ||
2ca32b48 TH |
61 | static struct workqueue_struct *fcoe_wq; |
62 | ||
e7a51997 JE |
63 | /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */ |
64 | static DECLARE_COMPLETION(fcoe_flush_completion); | |
65 | ||
85b4aa49 | 66 | /* fcoe host list */ |
090eb6c4 | 67 | /* must only by accessed under the RTNL mutex */ |
85b4aa49 | 68 | LIST_HEAD(fcoe_hostlist); |
5e5e92df | 69 | DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu); |
85b4aa49 | 70 | |
dd3fd72e | 71 | /* Function Prototypes */ |
1875f27e | 72 | static int fcoe_reset(struct Scsi_Host *); |
fdd78027 VD |
73 | static int fcoe_xmit(struct fc_lport *, struct fc_frame *); |
74 | static int fcoe_rcv(struct sk_buff *, struct net_device *, | |
75 | struct packet_type *, struct net_device *); | |
1875f27e | 76 | static int fcoe_percpu_receive_thread(void *); |
1875f27e | 77 | static void fcoe_percpu_clean(struct fc_lport *); |
5e4f8fe7 | 78 | static int fcoe_link_speed_update(struct fc_lport *); |
1875f27e | 79 | static int fcoe_link_ok(struct fc_lport *); |
fdd78027 VD |
80 | |
81 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); | |
82 | static int fcoe_hostlist_add(const struct fc_lport *); | |
fdd78027 | 83 | |
85b4aa49 RL |
84 | static int fcoe_device_notification(struct notifier_block *, ulong, void *); |
85 | static void fcoe_dev_setup(void); | |
86 | static void fcoe_dev_cleanup(void); | |
1875f27e RL |
87 | static struct fcoe_interface |
88 | *fcoe_hostlist_lookup_port(const struct net_device *); | |
89 | ||
90 | static int fcoe_fip_recv(struct sk_buff *, struct net_device *, | |
91 | struct packet_type *, struct net_device *); | |
92 | ||
93 | static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *); | |
94 | static void fcoe_update_src_mac(struct fc_lport *, u8 *); | |
95 | static u8 *fcoe_get_src_mac(struct fc_lport *); | |
96 | static void fcoe_destroy_work(struct work_struct *); | |
97 | ||
98 | static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *, | |
99 | unsigned int); | |
100 | static int fcoe_ddp_done(struct fc_lport *, u16); | |
71f89491 YZ |
101 | static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *, |
102 | unsigned int); | |
1875f27e RL |
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 *); |
bdf25218 | 140 | static int fcoe_validate_vport_create(struct fc_vport *); |
1875f27e RL |
141 | |
142 | static struct libfc_function_template fcoe_libfc_fcn_templ = { | |
143 | .frame_send = fcoe_xmit, | |
144 | .ddp_setup = fcoe_ddp_setup, | |
145 | .ddp_done = fcoe_ddp_done, | |
71f89491 | 146 | .ddp_target = fcoe_ddp_target, |
1875f27e | 147 | .elsct_send = fcoe_elsct_send, |
b84056bf | 148 | .get_lesb = fcoe_get_lesb, |
7d65b0df | 149 | .lport_set_port_id = fcoe_set_port_id, |
1875f27e | 150 | }; |
9a05753b | 151 | |
8ca86f84 | 152 | struct fc_function_template fcoe_nport_fc_functions = { |
7f349142 VD |
153 | .show_host_node_name = 1, |
154 | .show_host_port_name = 1, | |
155 | .show_host_supported_classes = 1, | |
156 | .show_host_supported_fc4s = 1, | |
157 | .show_host_active_fc4s = 1, | |
158 | .show_host_maxframe_size = 1, | |
159 | ||
160 | .show_host_port_id = 1, | |
161 | .show_host_supported_speeds = 1, | |
162 | .get_host_speed = fc_get_host_speed, | |
163 | .show_host_speed = 1, | |
164 | .show_host_port_type = 1, | |
165 | .get_host_port_state = fc_get_host_port_state, | |
166 | .show_host_port_state = 1, | |
167 | .show_host_symbolic_name = 1, | |
168 | ||
169 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
170 | .show_rport_maxframe_size = 1, | |
171 | .show_rport_supported_classes = 1, | |
172 | ||
173 | .show_host_fabric_name = 1, | |
174 | .show_starget_node_name = 1, | |
175 | .show_starget_port_name = 1, | |
176 | .show_starget_port_id = 1, | |
177 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
178 | .show_rport_dev_loss_tmo = 1, | |
179 | .get_fc_host_stats = fc_get_host_stats, | |
180 | .issue_fc_host_lip = fcoe_reset, | |
181 | ||
182 | .terminate_rport_io = fc_rport_terminate_io, | |
9a05753b CL |
183 | |
184 | .vport_create = fcoe_vport_create, | |
185 | .vport_delete = fcoe_vport_destroy, | |
186 | .vport_disable = fcoe_vport_disable, | |
dc8596d3 | 187 | .set_vport_symbolic_name = fcoe_set_vport_symbolic_name, |
a51ab396 SM |
188 | |
189 | .bsg_request = fc_lport_bsg_request, | |
7f349142 VD |
190 | }; |
191 | ||
8ca86f84 | 192 | struct fc_function_template fcoe_vport_fc_functions = { |
e9084bb8 CL |
193 | .show_host_node_name = 1, |
194 | .show_host_port_name = 1, | |
195 | .show_host_supported_classes = 1, | |
196 | .show_host_supported_fc4s = 1, | |
197 | .show_host_active_fc4s = 1, | |
198 | .show_host_maxframe_size = 1, | |
199 | ||
200 | .show_host_port_id = 1, | |
201 | .show_host_supported_speeds = 1, | |
202 | .get_host_speed = fc_get_host_speed, | |
203 | .show_host_speed = 1, | |
204 | .show_host_port_type = 1, | |
205 | .get_host_port_state = fc_get_host_port_state, | |
206 | .show_host_port_state = 1, | |
207 | .show_host_symbolic_name = 1, | |
208 | ||
209 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
210 | .show_rport_maxframe_size = 1, | |
211 | .show_rport_supported_classes = 1, | |
212 | ||
213 | .show_host_fabric_name = 1, | |
214 | .show_starget_node_name = 1, | |
215 | .show_starget_port_name = 1, | |
216 | .show_starget_port_id = 1, | |
217 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
218 | .show_rport_dev_loss_tmo = 1, | |
219 | .get_fc_host_stats = fc_get_host_stats, | |
220 | .issue_fc_host_lip = fcoe_reset, | |
221 | ||
222 | .terminate_rport_io = fc_rport_terminate_io, | |
a51ab396 SM |
223 | |
224 | .bsg_request = fc_lport_bsg_request, | |
e9084bb8 CL |
225 | }; |
226 | ||
7f349142 VD |
227 | static struct scsi_host_template fcoe_shost_template = { |
228 | .module = THIS_MODULE, | |
229 | .name = "FCoE Driver", | |
230 | .proc_name = FCOE_NAME, | |
231 | .queuecommand = fc_queuecommand, | |
232 | .eh_abort_handler = fc_eh_abort, | |
233 | .eh_device_reset_handler = fc_eh_device_reset, | |
234 | .eh_host_reset_handler = fc_eh_host_reset, | |
235 | .slave_alloc = fc_slave_alloc, | |
236 | .change_queue_depth = fc_change_queue_depth, | |
237 | .change_queue_type = fc_change_queue_type, | |
238 | .this_id = -1, | |
14caf44c | 239 | .cmd_per_lun = 3, |
7f349142 VD |
240 | .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, |
241 | .use_clustering = ENABLE_CLUSTERING, | |
242 | .sg_tablesize = SG_ALL, | |
243 | .max_sectors = 0xffff, | |
244 | }; | |
245 | ||
54b649f8 | 246 | /** |
1875f27e RL |
247 | * fcoe_interface_setup() - Setup a FCoE interface |
248 | * @fcoe: The new FCoE interface | |
249 | * @netdev: The net device that the fcoe interface is on | |
54b649f8 CL |
250 | * |
251 | * Returns : 0 for success | |
2e70e241 | 252 | * Locking: must be called with the RTNL mutex held |
54b649f8 CL |
253 | */ |
254 | static int fcoe_interface_setup(struct fcoe_interface *fcoe, | |
255 | struct net_device *netdev) | |
256 | { | |
257 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
258 | struct netdev_hw_addr *ha; | |
5bab87e6 | 259 | struct net_device *real_dev; |
54b649f8 | 260 | u8 flogi_maddr[ETH_ALEN]; |
b7a727f1 | 261 | const struct net_device_ops *ops; |
54b649f8 CL |
262 | |
263 | fcoe->netdev = netdev; | |
264 | ||
b7a727f1 YZ |
265 | /* Let LLD initialize for FCoE */ |
266 | ops = netdev->netdev_ops; | |
267 | if (ops->ndo_fcoe_enable) { | |
268 | if (ops->ndo_fcoe_enable(netdev)) | |
269 | FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE" | |
270 | " specific feature for LLD.\n"); | |
271 | } | |
272 | ||
54b649f8 | 273 | /* Do not support for bonding device */ |
cc8bdf06 | 274 | if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) { |
59d92516 | 275 | FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n"); |
54b649f8 CL |
276 | return -EOPNOTSUPP; |
277 | } | |
278 | ||
279 | /* look for SAN MAC address, if multiple SAN MACs exist, only | |
280 | * use the first one for SPMA */ | |
5bab87e6 YZ |
281 | real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ? |
282 | vlan_dev_real_dev(netdev) : netdev; | |
54b649f8 | 283 | rcu_read_lock(); |
5bab87e6 | 284 | for_each_dev_addr(real_dev, ha) { |
54b649f8 | 285 | if ((ha->type == NETDEV_HW_ADDR_T_SAN) && |
bf361707 | 286 | (is_valid_ether_addr(ha->addr))) { |
54b649f8 CL |
287 | memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); |
288 | fip->spma = 1; | |
289 | break; | |
290 | } | |
291 | } | |
292 | rcu_read_unlock(); | |
293 | ||
294 | /* setup Source Mac Address */ | |
295 | if (!fip->spma) | |
296 | memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); | |
297 | ||
298 | /* | |
299 | * Add FCoE MAC address as second unicast MAC address | |
300 | * or enter promiscuous mode if not capable of listening | |
301 | * for multiple unicast MACs. | |
302 | */ | |
54b649f8 | 303 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
a748ee24 | 304 | dev_uc_add(netdev, flogi_maddr); |
54b649f8 | 305 | if (fip->spma) |
a748ee24 | 306 | dev_uc_add(netdev, fip->ctl_src_addr); |
e10f8c66 JE |
307 | if (fip->mode == FIP_MODE_VN2VN) { |
308 | dev_mc_add(netdev, FIP_ALL_VN2VN_MACS); | |
309 | dev_mc_add(netdev, FIP_ALL_P2P_MACS); | |
310 | } else | |
311 | dev_mc_add(netdev, FIP_ALL_ENODE_MACS); | |
54b649f8 CL |
312 | |
313 | /* | |
314 | * setup the receive function from ethernet driver | |
315 | * on the ethertype for the given device | |
316 | */ | |
317 | fcoe->fcoe_packet_type.func = fcoe_rcv; | |
318 | fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE); | |
319 | fcoe->fcoe_packet_type.dev = netdev; | |
320 | dev_add_pack(&fcoe->fcoe_packet_type); | |
321 | ||
322 | fcoe->fip_packet_type.func = fcoe_fip_recv; | |
323 | fcoe->fip_packet_type.type = htons(ETH_P_FIP); | |
324 | fcoe->fip_packet_type.dev = netdev; | |
325 | dev_add_pack(&fcoe->fip_packet_type); | |
326 | ||
327 | return 0; | |
328 | } | |
329 | ||
030f4e00 | 330 | /** |
1875f27e RL |
331 | * fcoe_interface_create() - Create a FCoE interface on a net device |
332 | * @netdev: The net device to create the FCoE interface on | |
1dd454d9 | 333 | * @fip_mode: The mode to use for FIP |
030f4e00 CL |
334 | * |
335 | * Returns: pointer to a struct fcoe_interface or NULL on error | |
336 | */ | |
1dd454d9 JE |
337 | static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev, |
338 | enum fip_state fip_mode) | |
030f4e00 CL |
339 | { |
340 | struct fcoe_interface *fcoe; | |
59d92516 | 341 | int err; |
030f4e00 | 342 | |
7287fb91 RL |
343 | if (!try_module_get(THIS_MODULE)) { |
344 | FCOE_NETDEV_DBG(netdev, | |
345 | "Could not get a reference to the module\n"); | |
346 | fcoe = ERR_PTR(-EBUSY); | |
347 | goto out; | |
348 | } | |
349 | ||
030f4e00 CL |
350 | fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL); |
351 | if (!fcoe) { | |
352 | FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n"); | |
7287fb91 RL |
353 | fcoe = ERR_PTR(-ENOMEM); |
354 | goto out_nomod; | |
030f4e00 CL |
355 | } |
356 | ||
2e70e241 | 357 | dev_hold(netdev); |
030f4e00 | 358 | kref_init(&fcoe->kref); |
54b649f8 CL |
359 | |
360 | /* | |
361 | * Initialize FIP. | |
362 | */ | |
1dd454d9 | 363 | fcoe_ctlr_init(&fcoe->ctlr, fip_mode); |
54b649f8 CL |
364 | fcoe->ctlr.send = fcoe_fip_send; |
365 | fcoe->ctlr.update_mac = fcoe_update_src_mac; | |
11b56188 | 366 | fcoe->ctlr.get_src_addr = fcoe_get_src_mac; |
54b649f8 | 367 | |
59d92516 | 368 | err = fcoe_interface_setup(fcoe, netdev); |
369 | if (err) { | |
370 | fcoe_ctlr_destroy(&fcoe->ctlr); | |
371 | kfree(fcoe); | |
372 | dev_put(netdev); | |
7287fb91 RL |
373 | fcoe = ERR_PTR(err); |
374 | goto out_nomod; | |
59d92516 | 375 | } |
030f4e00 | 376 | |
7287fb91 RL |
377 | goto out; |
378 | ||
379 | out_nomod: | |
380 | module_put(THIS_MODULE); | |
381 | out: | |
030f4e00 CL |
382 | return fcoe; |
383 | } | |
384 | ||
f04ca1b6 VD |
385 | /** |
386 | * fcoe_interface_release() - fcoe_port kref release function | |
387 | * @kref: Embedded reference count in an fcoe_interface struct | |
388 | */ | |
389 | static void fcoe_interface_release(struct kref *kref) | |
390 | { | |
391 | struct fcoe_interface *fcoe; | |
392 | struct net_device *netdev; | |
393 | ||
394 | fcoe = container_of(kref, struct fcoe_interface, kref); | |
395 | netdev = fcoe->netdev; | |
396 | /* tear-down the FCoE controller */ | |
397 | fcoe_ctlr_destroy(&fcoe->ctlr); | |
398 | kfree(fcoe); | |
399 | dev_put(netdev); | |
400 | module_put(THIS_MODULE); | |
401 | } | |
402 | ||
403 | /** | |
404 | * fcoe_interface_get() - Get a reference to a FCoE interface | |
405 | * @fcoe: The FCoE interface to be held | |
406 | */ | |
407 | static inline void fcoe_interface_get(struct fcoe_interface *fcoe) | |
408 | { | |
409 | kref_get(&fcoe->kref); | |
410 | } | |
411 | ||
412 | /** | |
413 | * fcoe_interface_put() - Put a reference to a FCoE interface | |
414 | * @fcoe: The FCoE interface to be released | |
415 | */ | |
416 | static inline void fcoe_interface_put(struct fcoe_interface *fcoe) | |
417 | { | |
418 | kref_put(&fcoe->kref, fcoe_interface_release); | |
419 | } | |
420 | ||
54b649f8 | 421 | /** |
1875f27e RL |
422 | * fcoe_interface_cleanup() - Clean up a FCoE interface |
423 | * @fcoe: The FCoE interface to be cleaned up | |
2e70e241 CL |
424 | * |
425 | * Caller must be holding the RTNL mutex | |
54b649f8 CL |
426 | */ |
427 | void fcoe_interface_cleanup(struct fcoe_interface *fcoe) | |
428 | { | |
429 | struct net_device *netdev = fcoe->netdev; | |
430 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
431 | u8 flogi_maddr[ETH_ALEN]; | |
b7a727f1 | 432 | const struct net_device_ops *ops; |
54b649f8 CL |
433 | |
434 | /* | |
435 | * Don't listen for Ethernet packets anymore. | |
436 | * synchronize_net() ensures that the packet handlers are not running | |
437 | * on another CPU. dev_remove_pack() would do that, this calls the | |
438 | * unsyncronized version __dev_remove_pack() to avoid multiple delays. | |
439 | */ | |
440 | __dev_remove_pack(&fcoe->fcoe_packet_type); | |
441 | __dev_remove_pack(&fcoe->fip_packet_type); | |
442 | synchronize_net(); | |
443 | ||
54b649f8 | 444 | /* Delete secondary MAC addresses */ |
54b649f8 | 445 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
a748ee24 | 446 | dev_uc_del(netdev, flogi_maddr); |
54b649f8 | 447 | if (fip->spma) |
a748ee24 | 448 | dev_uc_del(netdev, fip->ctl_src_addr); |
e10f8c66 JE |
449 | if (fip->mode == FIP_MODE_VN2VN) { |
450 | dev_mc_del(netdev, FIP_ALL_VN2VN_MACS); | |
451 | dev_mc_del(netdev, FIP_ALL_P2P_MACS); | |
452 | } else | |
453 | dev_mc_del(netdev, FIP_ALL_ENODE_MACS); | |
b7a727f1 YZ |
454 | |
455 | /* Tell the LLD we are done w/ FCoE */ | |
456 | ops = netdev->netdev_ops; | |
457 | if (ops->ndo_fcoe_disable) { | |
458 | if (ops->ndo_fcoe_disable(netdev)) | |
459 | FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" | |
460 | " specific feature for LLD.\n"); | |
461 | } | |
b2085a4e NP |
462 | |
463 | /* Release the self-reference taken during fcoe_interface_create() */ | |
f04ca1b6 | 464 | fcoe_interface_put(fcoe); |
030f4e00 CL |
465 | } |
466 | ||
ab6b85c1 | 467 | /** |
1875f27e RL |
468 | * fcoe_fip_recv() - Handler for received FIP frames |
469 | * @skb: The receive skb | |
470 | * @netdev: The associated net device | |
471 | * @ptype: The packet_type structure which was used to register this handler | |
472 | * @orig_dev: The original net_device the the skb was received on. | |
473 | * (in case dev is a bond) | |
ab6b85c1 VD |
474 | * |
475 | * Returns: 0 for success | |
476 | */ | |
1875f27e | 477 | static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, |
ab6b85c1 VD |
478 | struct packet_type *ptype, |
479 | struct net_device *orig_dev) | |
480 | { | |
259ad85d | 481 | struct fcoe_interface *fcoe; |
ab6b85c1 | 482 | |
259ad85d | 483 | fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); |
3fe9a0ba | 484 | fcoe_ctlr_recv(&fcoe->ctlr, skb); |
ab6b85c1 VD |
485 | return 0; |
486 | } | |
487 | ||
488 | /** | |
1875f27e RL |
489 | * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame |
490 | * @fip: The FCoE controller | |
491 | * @skb: The FIP packet to be sent | |
ab6b85c1 VD |
492 | */ |
493 | static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
494 | { | |
3fe9a0ba | 495 | skb->dev = fcoe_from_ctlr(fip)->netdev; |
ab6b85c1 VD |
496 | dev_queue_xmit(skb); |
497 | } | |
498 | ||
499 | /** | |
1875f27e RL |
500 | * fcoe_update_src_mac() - Update the Ethernet MAC filters |
501 | * @lport: The local port to update the source MAC on | |
502 | * @addr: Unicast MAC address to add | |
ab6b85c1 VD |
503 | * |
504 | * Remove any previously-set unicast MAC filter. | |
505 | * Add secondary FCoE MAC address filter for our OUI. | |
506 | */ | |
11b56188 | 507 | static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) |
ab6b85c1 | 508 | { |
11b56188 | 509 | struct fcoe_port *port = lport_priv(lport); |
8597ae8b | 510 | struct fcoe_interface *fcoe = port->priv; |
25024989 | 511 | |
ab6b85c1 | 512 | rtnl_lock(); |
11b56188 | 513 | if (!is_zero_ether_addr(port->data_src_addr)) |
a748ee24 | 514 | dev_uc_del(fcoe->netdev, port->data_src_addr); |
11b56188 | 515 | if (!is_zero_ether_addr(addr)) |
a748ee24 | 516 | dev_uc_add(fcoe->netdev, addr); |
11b56188 | 517 | memcpy(port->data_src_addr, addr, ETH_ALEN); |
ab6b85c1 VD |
518 | rtnl_unlock(); |
519 | } | |
520 | ||
11b56188 CL |
521 | /** |
522 | * fcoe_get_src_mac() - return the Ethernet source address for an lport | |
523 | * @lport: libfc lport | |
524 | */ | |
525 | static u8 *fcoe_get_src_mac(struct fc_lport *lport) | |
526 | { | |
527 | struct fcoe_port *port = lport_priv(lport); | |
528 | ||
529 | return port->data_src_addr; | |
530 | } | |
531 | ||
7f349142 | 532 | /** |
1875f27e RL |
533 | * fcoe_lport_config() - Set up a local port |
534 | * @lport: The local port to be setup | |
7f349142 VD |
535 | * |
536 | * Returns: 0 for success | |
537 | */ | |
1875f27e | 538 | static int fcoe_lport_config(struct fc_lport *lport) |
7f349142 | 539 | { |
1875f27e RL |
540 | lport->link_up = 0; |
541 | lport->qfull = 0; | |
542 | lport->max_retry_count = 3; | |
543 | lport->max_rport_retry_count = 3; | |
544 | lport->e_d_tov = 2 * 1000; /* FC-FS default */ | |
545 | lport->r_a_tov = 2 * 2 * 1000; | |
546 | lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | | |
547 | FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); | |
548 | lport->does_npiv = 1; | |
549 | ||
550 | fc_lport_init_stats(lport); | |
7f349142 VD |
551 | |
552 | /* lport fc_lport related configuration */ | |
1875f27e | 553 | fc_lport_config(lport); |
7f349142 VD |
554 | |
555 | /* offload related configuration */ | |
1875f27e RL |
556 | lport->crc_offload = 0; |
557 | lport->seq_offload = 0; | |
558 | lport->lro_enabled = 0; | |
559 | lport->lro_xid = 0; | |
560 | lport->lso_max = 0; | |
7f349142 VD |
561 | |
562 | return 0; | |
563 | } | |
564 | ||
dcece412 YZ |
565 | /** |
566 | * fcoe_get_wwn() - Get the world wide name from LLD if it supports it | |
567 | * @netdev: the associated net device | |
568 | * @wwn: the output WWN | |
569 | * @type: the type of WWN (WWPN or WWNN) | |
570 | * | |
571 | * Returns: 0 for success | |
572 | */ | |
573 | static int fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type) | |
574 | { | |
575 | const struct net_device_ops *ops = netdev->netdev_ops; | |
576 | ||
577 | if (ops->ndo_fcoe_get_wwn) | |
578 | return ops->ndo_fcoe_get_wwn(netdev, wwn, type); | |
579 | return -EINVAL; | |
580 | } | |
581 | ||
54a5b21d YZ |
582 | /** |
583 | * fcoe_netdev_features_change - Updates the lport's offload flags based | |
584 | * on the LLD netdev's FCoE feature flags | |
585 | */ | |
586 | static void fcoe_netdev_features_change(struct fc_lport *lport, | |
587 | struct net_device *netdev) | |
588 | { | |
589 | mutex_lock(&lport->lp_mutex); | |
590 | ||
591 | if (netdev->features & NETIF_F_SG) | |
592 | lport->sg_supp = 1; | |
593 | else | |
594 | lport->sg_supp = 0; | |
595 | ||
596 | if (netdev->features & NETIF_F_FCOE_CRC) { | |
597 | lport->crc_offload = 1; | |
598 | FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); | |
599 | } else { | |
600 | lport->crc_offload = 0; | |
601 | } | |
602 | ||
603 | if (netdev->features & NETIF_F_FSO) { | |
604 | lport->seq_offload = 1; | |
605 | lport->lso_max = netdev->gso_max_size; | |
606 | FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", | |
607 | lport->lso_max); | |
608 | } else { | |
609 | lport->seq_offload = 0; | |
610 | lport->lso_max = 0; | |
611 | } | |
612 | ||
613 | if (netdev->fcoe_ddp_xid) { | |
614 | lport->lro_enabled = 1; | |
615 | lport->lro_xid = netdev->fcoe_ddp_xid; | |
616 | FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", | |
617 | lport->lro_xid); | |
618 | } else { | |
619 | lport->lro_enabled = 0; | |
620 | lport->lro_xid = 0; | |
621 | } | |
622 | ||
623 | mutex_unlock(&lport->lp_mutex); | |
624 | } | |
625 | ||
7f349142 | 626 | /** |
1875f27e RL |
627 | * fcoe_netdev_config() - Set up net devive for SW FCoE |
628 | * @lport: The local port that is associated with the net device | |
629 | * @netdev: The associated net device | |
7f349142 | 630 | * |
1875f27e | 631 | * Must be called after fcoe_lport_config() as it will use local port mutex |
7f349142 | 632 | * |
1875f27e | 633 | * Returns: 0 for success |
7f349142 | 634 | */ |
1875f27e | 635 | static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) |
7f349142 VD |
636 | { |
637 | u32 mfs; | |
638 | u64 wwnn, wwpn; | |
25024989 | 639 | struct fcoe_interface *fcoe; |
014f5c3f | 640 | struct fcoe_port *port; |
7f349142 VD |
641 | |
642 | /* Setup lport private data to point to fcoe softc */ | |
1875f27e | 643 | port = lport_priv(lport); |
8597ae8b | 644 | fcoe = port->priv; |
7f349142 VD |
645 | |
646 | /* | |
647 | * Determine max frame size based on underlying device and optional | |
648 | * user-configured limit. If the MFS is too low, fcoe_link_ok() | |
649 | * will return 0, so do this first. | |
650 | */ | |
7221d7e5 YZ |
651 | mfs = netdev->mtu; |
652 | if (netdev->features & NETIF_F_FCOE_MTU) { | |
653 | mfs = FCOE_MTU; | |
654 | FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); | |
655 | } | |
656 | mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); | |
1875f27e | 657 | if (fc_set_mfs(lport, mfs)) |
7f349142 VD |
658 | return -EINVAL; |
659 | ||
7f349142 | 660 | /* offload features support */ |
54a5b21d | 661 | fcoe_netdev_features_change(lport, netdev); |
7f349142 | 662 | |
014f5c3f CL |
663 | skb_queue_head_init(&port->fcoe_pending_queue); |
664 | port->fcoe_pending_queue_active = 0; | |
1875f27e | 665 | setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport); |
7f349142 | 666 | |
5e4f8fe7 RL |
667 | fcoe_link_speed_update(lport); |
668 | ||
1875f27e | 669 | if (!lport->vport) { |
dcece412 YZ |
670 | if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN)) |
671 | wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0); | |
1875f27e | 672 | fc_set_wwnn(lport, wwnn); |
dcece412 YZ |
673 | if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN)) |
674 | wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, | |
cf4aebca | 675 | 2, 0); |
1875f27e | 676 | fc_set_wwpn(lport, wwpn); |
9a05753b | 677 | } |
7f349142 | 678 | |
7f349142 VD |
679 | return 0; |
680 | } | |
681 | ||
682 | /** | |
1875f27e RL |
683 | * fcoe_shost_config() - Set up the SCSI host associated with a local port |
684 | * @lport: The local port | |
1875f27e | 685 | * @dev: The device associated with the SCSI host |
7f349142 VD |
686 | * |
687 | * Must be called after fcoe_lport_config() and fcoe_netdev_config() | |
688 | * | |
1875f27e | 689 | * Returns: 0 for success |
7f349142 | 690 | */ |
8ba00a4b | 691 | static int fcoe_shost_config(struct fc_lport *lport, struct device *dev) |
7f349142 VD |
692 | { |
693 | int rc = 0; | |
694 | ||
695 | /* lport scsi host config */ | |
1875f27e RL |
696 | lport->host->max_lun = FCOE_MAX_LUN; |
697 | lport->host->max_id = FCOE_MAX_FCP_TARGET; | |
698 | lport->host->max_channel = 0; | |
da87bfab VD |
699 | lport->host->max_cmd_len = FCOE_MAX_CMD_LEN; |
700 | ||
1875f27e | 701 | if (lport->vport) |
8ca86f84 | 702 | lport->host->transportt = fcoe_vport_scsi_transport; |
e9084bb8 | 703 | else |
8ca86f84 | 704 | lport->host->transportt = fcoe_nport_scsi_transport; |
7f349142 VD |
705 | |
706 | /* add the new host to the SCSI-ml */ | |
1875f27e | 707 | rc = scsi_add_host(lport->host, dev); |
7f349142 | 708 | if (rc) { |
1875f27e | 709 | FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " |
d5488eb9 | 710 | "error on scsi_add_host\n"); |
7f349142 VD |
711 | return rc; |
712 | } | |
9a05753b | 713 | |
1875f27e | 714 | if (!lport->vport) |
4be929be | 715 | fc_host_max_npiv_vports(lport->host) = USHRT_MAX; |
9a05753b | 716 | |
1875f27e | 717 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, |
5baa17c3 | 718 | "%s v%s over %s", FCOE_NAME, FCOE_VERSION, |
1875f27e | 719 | fcoe_netdev(lport)->name); |
7f349142 VD |
720 | |
721 | return 0; | |
722 | } | |
723 | ||
1875f27e RL |
724 | /** |
725 | * fcoe_oem_match() - The match routine for the offloaded exchange manager | |
726 | * @fp: The I/O frame | |
d7179680 | 727 | * |
1875f27e RL |
728 | * This routine will be associated with an exchange manager (EM). When |
729 | * the libfc exchange handling code is looking for an EM to use it will | |
730 | * call this routine and pass it the frame that it wishes to send. This | |
731 | * routine will return True if the associated EM is to be used and False | |
732 | * if the echange code should continue looking for an EM. | |
733 | * | |
734 | * The offload EM that this routine is associated with will handle any | |
735 | * packets that are for SCSI read requests. | |
736 | * | |
1ff9918b KP |
737 | * This has been enhanced to work when FCoE stack is operating in target |
738 | * mode. | |
739 | * | |
1875f27e | 740 | * Returns: True for read types I/O, otherwise returns false. |
d7179680 VD |
741 | */ |
742 | bool fcoe_oem_match(struct fc_frame *fp) | |
743 | { | |
1ff9918b KP |
744 | struct fc_frame_header *fh = fc_frame_header_get(fp); |
745 | struct fcp_cmnd *fcp; | |
746 | ||
747 | if (fc_fcp_is_read(fr_fsp(fp)) && | |
748 | (fr_fsp(fp)->data_len > fcoe_ddp_min)) | |
749 | return true; | |
750 | else if (!(ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)) { | |
751 | fcp = fc_frame_payload_get(fp, sizeof(*fcp)); | |
752 | if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN && | |
753 | fcp && (ntohl(fcp->fc_dl) > fcoe_ddp_min) && | |
754 | (fcp->fc_flags & FCP_CFL_WRDATA)) | |
755 | return true; | |
756 | } | |
757 | return false; | |
d7179680 VD |
758 | } |
759 | ||
7f349142 | 760 | /** |
1875f27e RL |
761 | * fcoe_em_config() - Allocate and configure an exchange manager |
762 | * @lport: The local port that the new EM will be associated with | |
7f349142 | 763 | * |
1875f27e | 764 | * Returns: 0 on success |
7f349142 | 765 | */ |
1875f27e | 766 | static inline int fcoe_em_config(struct fc_lport *lport) |
7f349142 | 767 | { |
1875f27e | 768 | struct fcoe_port *port = lport_priv(lport); |
8597ae8b | 769 | struct fcoe_interface *fcoe = port->priv; |
25024989 | 770 | struct fcoe_interface *oldfcoe = NULL; |
1d1b88dc | 771 | struct net_device *old_real_dev, *cur_real_dev; |
d7179680 VD |
772 | u16 min_xid = FCOE_MIN_XID; |
773 | u16 max_xid = FCOE_MAX_XID; | |
774 | ||
775 | /* | |
776 | * Check if need to allocate an em instance for | |
777 | * offload exchange ids to be shared across all VN_PORTs/lport. | |
778 | */ | |
1875f27e RL |
779 | if (!lport->lro_enabled || !lport->lro_xid || |
780 | (lport->lro_xid >= max_xid)) { | |
781 | lport->lro_xid = 0; | |
d7179680 VD |
782 | goto skip_oem; |
783 | } | |
784 | ||
785 | /* | |
786 | * Reuse existing offload em instance in case | |
1d1b88dc | 787 | * it is already allocated on real eth device |
d7179680 | 788 | */ |
25024989 CL |
789 | if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
790 | cur_real_dev = vlan_dev_real_dev(fcoe->netdev); | |
1d1b88dc | 791 | else |
25024989 | 792 | cur_real_dev = fcoe->netdev; |
1d1b88dc | 793 | |
25024989 | 794 | list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { |
25024989 CL |
795 | if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
796 | old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); | |
1d1b88dc | 797 | else |
25024989 | 798 | old_real_dev = oldfcoe->netdev; |
1d1b88dc VD |
799 | |
800 | if (cur_real_dev == old_real_dev) { | |
991cbb60 | 801 | fcoe->oem = oldfcoe->oem; |
d7179680 VD |
802 | break; |
803 | } | |
804 | } | |
805 | ||
991cbb60 | 806 | if (fcoe->oem) { |
1875f27e | 807 | if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { |
d7179680 VD |
808 | printk(KERN_ERR "fcoe_em_config: failed to add " |
809 | "offload em:%p on interface:%s\n", | |
991cbb60 | 810 | fcoe->oem, fcoe->netdev->name); |
d7179680 VD |
811 | return -ENOMEM; |
812 | } | |
813 | } else { | |
1875f27e RL |
814 | fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, |
815 | FCOE_MIN_XID, lport->lro_xid, | |
816 | fcoe_oem_match); | |
991cbb60 | 817 | if (!fcoe->oem) { |
d7179680 VD |
818 | printk(KERN_ERR "fcoe_em_config: failed to allocate " |
819 | "em for offload exches on interface:%s\n", | |
25024989 | 820 | fcoe->netdev->name); |
d7179680 VD |
821 | return -ENOMEM; |
822 | } | |
823 | } | |
824 | ||
825 | /* | |
826 | * Exclude offload EM xid range from next EM xid range. | |
827 | */ | |
1875f27e | 828 | min_xid += lport->lro_xid + 1; |
d7179680 VD |
829 | |
830 | skip_oem: | |
1875f27e | 831 | if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { |
d7179680 | 832 | printk(KERN_ERR "fcoe_em_config: failed to " |
25024989 | 833 | "allocate em on interface %s\n", fcoe->netdev->name); |
7f349142 | 834 | return -ENOMEM; |
d7179680 | 835 | } |
7f349142 VD |
836 | |
837 | return 0; | |
838 | } | |
839 | ||
840 | /** | |
1875f27e RL |
841 | * fcoe_if_destroy() - Tear down a SW FCoE instance |
842 | * @lport: The local port to be destroyed | |
34ce27bc | 843 | * |
7f349142 | 844 | */ |
af7f85d9 | 845 | static void fcoe_if_destroy(struct fc_lport *lport) |
7f349142 | 846 | { |
b2085a4e NP |
847 | struct fcoe_port *port = lport_priv(lport); |
848 | struct fcoe_interface *fcoe = port->priv; | |
849 | struct net_device *netdev = fcoe->netdev; | |
850 | ||
851 | FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); | |
852 | ||
853 | /* Logout of the fabric */ | |
854 | fc_fabric_logoff(lport); | |
855 | ||
856 | /* Cleanup the fc_lport */ | |
857 | fc_lport_destroy(lport); | |
858 | ||
859 | /* Stop the transmit retry timer */ | |
860 | del_timer_sync(&port->timer); | |
861 | ||
862 | /* Free existing transmit skbs */ | |
863 | fcoe_clean_pending_queue(lport); | |
864 | ||
865 | rtnl_lock(); | |
866 | if (!is_zero_ether_addr(port->data_src_addr)) | |
867 | dev_uc_del(netdev, port->data_src_addr); | |
868 | rtnl_unlock(); | |
869 | ||
870 | /* Release reference held in fcoe_if_create() */ | |
871 | fcoe_interface_put(fcoe); | |
872 | ||
f161fb72 | 873 | /* Free queued packets for the per-CPU receive threads */ |
af7f85d9 | 874 | fcoe_percpu_clean(lport); |
f161fb72 | 875 | |
7f349142 | 876 | /* Detach from the scsi-ml */ |
af7f85d9 CL |
877 | fc_remove_host(lport->host); |
878 | scsi_remove_host(lport->host); | |
7f349142 | 879 | |
80e736f8 YZ |
880 | /* Destroy lport scsi_priv */ |
881 | fc_fcp_destroy(lport); | |
882 | ||
7f349142 | 883 | /* There are no more rports or I/O, free the EM */ |
af7f85d9 | 884 | fc_exch_mgr_free(lport); |
7f349142 | 885 | |
7f349142 | 886 | /* Free memory used by statistical counters */ |
af7f85d9 | 887 | fc_lport_free_stats(lport); |
7f349142 | 888 | |
2e70e241 | 889 | /* Release the Scsi_Host */ |
af7f85d9 | 890 | scsi_host_put(lport->host); |
7f349142 VD |
891 | } |
892 | ||
1875f27e RL |
893 | /** |
894 | * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device | |
895 | * @lport: The local port to setup DDP for | |
896 | * @xid: The exchange ID for this DDP transfer | |
897 | * @sgl: The scatterlist describing this transfer | |
898 | * @sgc: The number of sg items | |
7f349142 | 899 | * |
1875f27e | 900 | * Returns: 0 if the DDP context was not configured |
7f349142 | 901 | */ |
1875f27e RL |
902 | static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, |
903 | struct scatterlist *sgl, unsigned int sgc) | |
7f349142 | 904 | { |
1875f27e | 905 | struct net_device *netdev = fcoe_netdev(lport); |
7f349142 | 906 | |
1875f27e RL |
907 | if (netdev->netdev_ops->ndo_fcoe_ddp_setup) |
908 | return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, | |
909 | xid, sgl, | |
910 | sgc); | |
7f349142 VD |
911 | |
912 | return 0; | |
913 | } | |
914 | ||
71f89491 YZ |
915 | /** |
916 | * fcoe_ddp_target() - Call a LLD's ddp_target through the net device | |
917 | * @lport: The local port to setup DDP for | |
918 | * @xid: The exchange ID for this DDP transfer | |
919 | * @sgl: The scatterlist describing this transfer | |
920 | * @sgc: The number of sg items | |
921 | * | |
922 | * Returns: 0 if the DDP context was not configured | |
923 | */ | |
924 | static int fcoe_ddp_target(struct fc_lport *lport, u16 xid, | |
925 | struct scatterlist *sgl, unsigned int sgc) | |
926 | { | |
927 | struct net_device *netdev = fcoe_netdev(lport); | |
928 | ||
929 | if (netdev->netdev_ops->ndo_fcoe_ddp_target) | |
930 | return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid, | |
931 | sgl, sgc); | |
932 | ||
933 | return 0; | |
934 | } | |
935 | ||
936 | ||
1875f27e RL |
937 | /** |
938 | * fcoe_ddp_done() - Call a LLD's ddp_done through the net device | |
939 | * @lport: The local port to complete DDP on | |
940 | * @xid: The exchange ID for this DDP transfer | |
7f349142 | 941 | * |
1875f27e | 942 | * Returns: the length of data that have been completed by DDP |
7f349142 | 943 | */ |
1875f27e | 944 | static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) |
7f349142 | 945 | { |
1875f27e | 946 | struct net_device *netdev = fcoe_netdev(lport); |
7f349142 | 947 | |
1875f27e RL |
948 | if (netdev->netdev_ops->ndo_fcoe_ddp_done) |
949 | return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); | |
7f349142 VD |
950 | return 0; |
951 | } | |
952 | ||
7f349142 | 953 | /** |
1875f27e RL |
954 | * fcoe_if_create() - Create a FCoE instance on an interface |
955 | * @fcoe: The FCoE interface to create a local port on | |
956 | * @parent: The device pointer to be the parent in sysfs for the SCSI host | |
957 | * @npiv: Indicates if the port is a vport or not | |
7f349142 | 958 | * |
1875f27e | 959 | * Creates a fc_lport instance and a Scsi_Host instance and configure them. |
7f349142 | 960 | * |
1875f27e | 961 | * Returns: The allocated fc_lport or an error pointer |
7f349142 | 962 | */ |
030f4e00 | 963 | static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, |
9a05753b | 964 | struct device *parent, int npiv) |
7f349142 | 965 | { |
1875f27e | 966 | struct net_device *netdev = fcoe->netdev; |
72fa396b | 967 | struct fc_lport *lport, *n_port; |
014f5c3f | 968 | struct fcoe_port *port; |
72fa396b | 969 | struct Scsi_Host *shost; |
1875f27e | 970 | int rc; |
9a05753b CL |
971 | /* |
972 | * parent is only a vport if npiv is 1, | |
973 | * but we'll only use vport in that case so go ahead and set it | |
974 | */ | |
975 | struct fc_vport *vport = dev_to_vport(parent); | |
7f349142 | 976 | |
d5488eb9 | 977 | FCOE_NETDEV_DBG(netdev, "Create Interface\n"); |
7f349142 | 978 | |
72fa396b VD |
979 | if (!npiv) |
980 | lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port)); | |
981 | else | |
982 | lport = libfc_vport_create(vport, sizeof(*port)); | |
983 | ||
86221969 | 984 | if (!lport) { |
d5488eb9 | 985 | FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); |
af7f85d9 | 986 | rc = -ENOMEM; |
030f4e00 | 987 | goto out; |
7f349142 | 988 | } |
014f5c3f | 989 | port = lport_priv(lport); |
2e70e241 | 990 | port->lport = lport; |
8597ae8b BPG |
991 | port->priv = fcoe; |
992 | port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH; | |
993 | port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH; | |
2e70e241 | 994 | INIT_WORK(&port->destroy_work, fcoe_destroy_work); |
7f349142 | 995 | |
1875f27e | 996 | /* configure a fc_lport including the exchange manager */ |
af7f85d9 | 997 | rc = fcoe_lport_config(lport); |
7f349142 | 998 | if (rc) { |
d5488eb9 RL |
999 | FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " |
1000 | "interface\n"); | |
7f349142 VD |
1001 | goto out_host_put; |
1002 | } | |
1003 | ||
9a05753b | 1004 | if (npiv) { |
9f8f3aa6 CL |
1005 | FCOE_NETDEV_DBG(netdev, "Setting vport names, " |
1006 | "%16.16llx %16.16llx\n", | |
1875f27e | 1007 | vport->node_name, vport->port_name); |
9a05753b CL |
1008 | fc_set_wwnn(lport, vport->node_name); |
1009 | fc_set_wwpn(lport, vport->port_name); | |
1010 | } | |
1011 | ||
ab6b85c1 | 1012 | /* configure lport network properties */ |
af7f85d9 | 1013 | rc = fcoe_netdev_config(lport, netdev); |
ab6b85c1 | 1014 | if (rc) { |
d5488eb9 RL |
1015 | FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " |
1016 | "interface\n"); | |
54b649f8 | 1017 | goto out_lp_destroy; |
ab6b85c1 | 1018 | } |
97c8389d | 1019 | |
7f349142 | 1020 | /* configure lport scsi host properties */ |
8ba00a4b | 1021 | rc = fcoe_shost_config(lport, parent); |
7f349142 | 1022 | if (rc) { |
d5488eb9 RL |
1023 | FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " |
1024 | "interface\n"); | |
54b649f8 | 1025 | goto out_lp_destroy; |
7f349142 VD |
1026 | } |
1027 | ||
96316099 | 1028 | /* Initialize the library */ |
e10f8c66 | 1029 | rc = fcoe_libfc_config(lport, &fcoe->ctlr, &fcoe_libfc_fcn_templ, 1); |
7f349142 | 1030 | if (rc) { |
96316099 | 1031 | FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " |
d5488eb9 | 1032 | "interface\n"); |
96316099 | 1033 | goto out_lp_destroy; |
7f349142 VD |
1034 | } |
1035 | ||
72fa396b VD |
1036 | /* |
1037 | * fcoe_em_alloc() and fcoe_hostlist_add() both | |
1038 | * need to be atomic with respect to other changes to the | |
1039 | * hostlist since fcoe_em_alloc() looks for an existing EM | |
1040 | * instance on host list updated by fcoe_hostlist_add(). | |
1041 | * | |
1042 | * This is currently handled through the fcoe_config_mutex | |
1043 | * begin held. | |
1044 | */ | |
1045 | if (!npiv) | |
9a05753b CL |
1046 | /* lport exch manager allocation */ |
1047 | rc = fcoe_em_config(lport); | |
72fa396b VD |
1048 | else { |
1049 | shost = vport_to_shost(vport); | |
1050 | n_port = shost_priv(shost); | |
1051 | rc = fc_exch_mgr_list_clone(n_port, lport); | |
1052 | } | |
1053 | ||
1054 | if (rc) { | |
1055 | FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n"); | |
1056 | goto out_lp_destroy; | |
7f349142 VD |
1057 | } |
1058 | ||
030f4e00 | 1059 | fcoe_interface_get(fcoe); |
af7f85d9 | 1060 | return lport; |
7f349142 VD |
1061 | |
1062 | out_lp_destroy: | |
af7f85d9 | 1063 | fc_exch_mgr_free(lport); |
7f349142 | 1064 | out_host_put: |
af7f85d9 CL |
1065 | scsi_host_put(lport->host); |
1066 | out: | |
1067 | return ERR_PTR(rc); | |
7f349142 VD |
1068 | } |
1069 | ||
1070 | /** | |
1875f27e | 1071 | * fcoe_if_init() - Initialization routine for fcoe.ko |
7f349142 | 1072 | * |
1875f27e RL |
1073 | * Attaches the SW FCoE transport to the FC transport |
1074 | * | |
1075 | * Returns: 0 on success | |
7f349142 VD |
1076 | */ |
1077 | static int __init fcoe_if_init(void) | |
1078 | { | |
1079 | /* attach to scsi transport */ | |
8ca86f84 YZ |
1080 | fcoe_nport_scsi_transport = |
1081 | fc_attach_transport(&fcoe_nport_fc_functions); | |
1082 | fcoe_vport_scsi_transport = | |
1083 | fc_attach_transport(&fcoe_vport_fc_functions); | |
7f349142 | 1084 | |
8ca86f84 | 1085 | if (!fcoe_nport_scsi_transport) { |
d5488eb9 | 1086 | printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); |
7f349142 VD |
1087 | return -ENODEV; |
1088 | } | |
1089 | ||
1090 | return 0; | |
1091 | } | |
1092 | ||
1093 | /** | |
1875f27e RL |
1094 | * fcoe_if_exit() - Tear down fcoe.ko |
1095 | * | |
1096 | * Detaches the SW FCoE transport from the FC transport | |
7f349142 | 1097 | * |
1875f27e | 1098 | * Returns: 0 on success |
7f349142 VD |
1099 | */ |
1100 | int __exit fcoe_if_exit(void) | |
1101 | { | |
8ca86f84 YZ |
1102 | fc_release_transport(fcoe_nport_scsi_transport); |
1103 | fc_release_transport(fcoe_vport_scsi_transport); | |
1104 | fcoe_nport_scsi_transport = NULL; | |
1105 | fcoe_vport_scsi_transport = NULL; | |
7f349142 VD |
1106 | return 0; |
1107 | } | |
1108 | ||
8976f424 | 1109 | /** |
1875f27e RL |
1110 | * fcoe_percpu_thread_create() - Create a receive thread for an online CPU |
1111 | * @cpu: The CPU index of the CPU to create a receive thread for | |
8976f424 RL |
1112 | */ |
1113 | static void fcoe_percpu_thread_create(unsigned int cpu) | |
1114 | { | |
1115 | struct fcoe_percpu_s *p; | |
1116 | struct task_struct *thread; | |
1117 | ||
1118 | p = &per_cpu(fcoe_percpu, cpu); | |
1119 | ||
1120 | thread = kthread_create(fcoe_percpu_receive_thread, | |
1121 | (void *)p, "fcoethread/%d", cpu); | |
1122 | ||
e7a51997 | 1123 | if (likely(!IS_ERR(thread))) { |
8976f424 RL |
1124 | kthread_bind(thread, cpu); |
1125 | wake_up_process(thread); | |
1126 | ||
1127 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1128 | p->thread = thread; | |
1129 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1130 | } | |
1131 | } | |
1132 | ||
1133 | /** | |
1875f27e RL |
1134 | * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU |
1135 | * @cpu: The CPU index of the CPU whose receive thread is to be destroyed | |
8976f424 RL |
1136 | * |
1137 | * Destroys a per-CPU Rx thread. Any pending skbs are moved to the | |
1138 | * current CPU's Rx thread. If the thread being destroyed is bound to | |
1139 | * the CPU processing this context the skbs will be freed. | |
1140 | */ | |
1141 | static void fcoe_percpu_thread_destroy(unsigned int cpu) | |
1142 | { | |
1143 | struct fcoe_percpu_s *p; | |
1144 | struct task_struct *thread; | |
1145 | struct page *crc_eof; | |
1146 | struct sk_buff *skb; | |
1147 | #ifdef CONFIG_SMP | |
1148 | struct fcoe_percpu_s *p0; | |
f018b73a | 1149 | unsigned targ_cpu = get_cpu(); |
8976f424 RL |
1150 | #endif /* CONFIG_SMP */ |
1151 | ||
d5488eb9 | 1152 | FCOE_DBG("Destroying receive thread for CPU %d\n", cpu); |
8976f424 RL |
1153 | |
1154 | /* Prevent any new skbs from being queued for this CPU. */ | |
1155 | p = &per_cpu(fcoe_percpu, cpu); | |
1156 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1157 | thread = p->thread; | |
1158 | p->thread = NULL; | |
1159 | crc_eof = p->crc_eof_page; | |
1160 | p->crc_eof_page = NULL; | |
1161 | p->crc_eof_offset = 0; | |
1162 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1163 | ||
1164 | #ifdef CONFIG_SMP | |
1165 | /* | |
1166 | * Don't bother moving the skb's if this context is running | |
1167 | * on the same CPU that is having its thread destroyed. This | |
1168 | * can easily happen when the module is removed. | |
1169 | */ | |
1170 | if (cpu != targ_cpu) { | |
1171 | p0 = &per_cpu(fcoe_percpu, targ_cpu); | |
1172 | spin_lock_bh(&p0->fcoe_rx_list.lock); | |
1173 | if (p0->thread) { | |
d5488eb9 RL |
1174 | FCOE_DBG("Moving frames from CPU %d to CPU %d\n", |
1175 | cpu, targ_cpu); | |
8976f424 RL |
1176 | |
1177 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1178 | __skb_queue_tail(&p0->fcoe_rx_list, skb); | |
1179 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
1180 | } else { | |
1181 | /* | |
1182 | * The targeted CPU is not initialized and cannot accept | |
1875f27e | 1183 | * new skbs. Unlock the targeted CPU and drop the skbs |
8976f424 RL |
1184 | * on the CPU that is going offline. |
1185 | */ | |
1186 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1187 | kfree_skb(skb); | |
1188 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
1189 | } | |
1190 | } else { | |
1191 | /* | |
1192 | * This scenario occurs when the module is being removed | |
1193 | * and all threads are being destroyed. skbs will continue | |
1194 | * to be shifted from the CPU thread that is being removed | |
1195 | * to the CPU thread associated with the CPU that is processing | |
1196 | * the module removal. Once there is only one CPU Rx thread it | |
1197 | * will reach this case and we will drop all skbs and later | |
1198 | * stop the thread. | |
1199 | */ | |
1200 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1201 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1202 | kfree_skb(skb); | |
1203 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1204 | } | |
f018b73a | 1205 | put_cpu(); |
8976f424 RL |
1206 | #else |
1207 | /* | |
dd3fd72e | 1208 | * This a non-SMP scenario where the singular Rx thread is |
8976f424 RL |
1209 | * being removed. Free all skbs and stop the thread. |
1210 | */ | |
1211 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1212 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1213 | kfree_skb(skb); | |
1214 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1215 | #endif | |
1216 | ||
1217 | if (thread) | |
1218 | kthread_stop(thread); | |
1219 | ||
1220 | if (crc_eof) | |
1221 | put_page(crc_eof); | |
1222 | } | |
1223 | ||
1224 | /** | |
1875f27e RL |
1225 | * fcoe_cpu_callback() - Handler for CPU hotplug events |
1226 | * @nfb: The callback data block | |
1227 | * @action: The event triggering the callback | |
1228 | * @hcpu: The index of the CPU that the event is for | |
8976f424 | 1229 | * |
1875f27e | 1230 | * This creates or destroys per-CPU data for fcoe |
8976f424 RL |
1231 | * |
1232 | * Returns NOTIFY_OK always. | |
1233 | */ | |
1234 | static int fcoe_cpu_callback(struct notifier_block *nfb, | |
1235 | unsigned long action, void *hcpu) | |
1236 | { | |
1237 | unsigned cpu = (unsigned long)hcpu; | |
1238 | ||
1239 | switch (action) { | |
1240 | case CPU_ONLINE: | |
1241 | case CPU_ONLINE_FROZEN: | |
d5488eb9 | 1242 | FCOE_DBG("CPU %x online: Create Rx thread\n", cpu); |
8976f424 RL |
1243 | fcoe_percpu_thread_create(cpu); |
1244 | break; | |
1245 | case CPU_DEAD: | |
1246 | case CPU_DEAD_FROZEN: | |
d5488eb9 | 1247 | FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu); |
8976f424 RL |
1248 | fcoe_percpu_thread_destroy(cpu); |
1249 | break; | |
1250 | default: | |
1251 | break; | |
1252 | } | |
1253 | return NOTIFY_OK; | |
1254 | } | |
1255 | ||
064287ee KP |
1256 | /** |
1257 | * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming | |
1258 | * command. | |
1259 | * @curr_cpu: CPU which received request | |
1260 | * | |
1261 | * This routine selects next CPU based on cpumask. | |
1262 | * | |
1263 | * Returns: int (CPU number). Caller to verify if returned CPU is online or not. | |
1264 | */ | |
1265 | static unsigned int fcoe_select_cpu(unsigned int curr_cpu) | |
1266 | { | |
1267 | static unsigned int selected_cpu; | |
1268 | ||
1269 | if (num_online_cpus() == 1) | |
1270 | return curr_cpu; | |
1271 | /* | |
1272 | * Doing following check, to skip "curr_cpu (smp_processor_id)" | |
1273 | * from selection of CPU is intentional. This is to avoid same CPU | |
1274 | * doing post-processing of command. "curr_cpu" to just receive | |
1275 | * incoming request in case where rx_id is UNKNOWN and all other | |
1276 | * CPU to actually process the command(s) | |
1277 | */ | |
1278 | do { | |
1279 | selected_cpu = cpumask_next(selected_cpu, cpu_online_mask); | |
1280 | if (selected_cpu >= nr_cpu_ids) | |
1281 | selected_cpu = cpumask_first(cpu_online_mask); | |
1282 | } while (selected_cpu == curr_cpu); | |
1283 | return selected_cpu; | |
1284 | } | |
1285 | ||
85b4aa49 | 1286 | /** |
1875f27e RL |
1287 | * fcoe_rcv() - Receive packets from a net device |
1288 | * @skb: The received packet | |
1289 | * @netdev: The net device that the packet was received on | |
1290 | * @ptype: The packet type context | |
1291 | * @olddev: The last device net device | |
85b4aa49 | 1292 | * |
1875f27e RL |
1293 | * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a |
1294 | * FC frame and passes the frame to libfc. | |
85b4aa49 RL |
1295 | * |
1296 | * Returns: 0 for success | |
34f42a07 | 1297 | */ |
1875f27e | 1298 | int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, |
85b4aa49 RL |
1299 | struct packet_type *ptype, struct net_device *olddev) |
1300 | { | |
1875f27e | 1301 | struct fc_lport *lport; |
85b4aa49 | 1302 | struct fcoe_rcv_info *fr; |
259ad85d | 1303 | struct fcoe_interface *fcoe; |
85b4aa49 | 1304 | struct fc_frame_header *fh; |
85b4aa49 | 1305 | struct fcoe_percpu_s *fps; |
519e5135 | 1306 | struct ethhdr *eh; |
b2f0091f | 1307 | unsigned int cpu; |
85b4aa49 | 1308 | |
259ad85d | 1309 | fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); |
1875f27e RL |
1310 | lport = fcoe->ctlr.lp; |
1311 | if (unlikely(!lport)) { | |
1312 | FCOE_NETDEV_DBG(netdev, "Cannot find hba structure"); | |
85b4aa49 RL |
1313 | goto err2; |
1314 | } | |
1875f27e | 1315 | if (!lport->link_up) |
97c8389d | 1316 | goto err2; |
85b4aa49 | 1317 | |
1875f27e | 1318 | FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p " |
d5488eb9 RL |
1319 | "data:%p tail:%p end:%p sum:%d dev:%s", |
1320 | skb->len, skb->data_len, skb->head, skb->data, | |
1321 | skb_tail_pointer(skb), skb_end_pointer(skb), | |
1322 | skb->csum, skb->dev ? skb->dev->name : "<NULL>"); | |
85b4aa49 | 1323 | |
519e5135 | 1324 | eh = eth_hdr(skb); |
519e5135 VD |
1325 | |
1326 | if (is_fip_mode(&fcoe->ctlr) && | |
1327 | compare_ether_addr(eh->h_source, fcoe->ctlr.dest_addr)) { | |
1328 | FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n", | |
1329 | eh->h_source); | |
85b4aa49 RL |
1330 | goto err; |
1331 | } | |
1332 | ||
1333 | /* | |
1334 | * Check for minimum frame length, and make sure required FCoE | |
1335 | * and FC headers are pulled into the linear data area. | |
1336 | */ | |
1337 | if (unlikely((skb->len < FCOE_MIN_FRAME) || | |
1875f27e | 1338 | !pskb_may_pull(skb, FCOE_HEADER_LEN))) |
85b4aa49 RL |
1339 | goto err; |
1340 | ||
1341 | skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); | |
1342 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1343 | ||
0ee31cb5 RL |
1344 | if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) { |
1345 | FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n", | |
1346 | eh->h_dest); | |
1347 | goto err; | |
1348 | } | |
1349 | ||
85b4aa49 | 1350 | fr = fcoe_dev_from_skb(skb); |
1875f27e | 1351 | fr->fr_dev = lport; |
85b4aa49 | 1352 | fr->ptype = ptype; |
5e5e92df | 1353 | |
85b4aa49 | 1354 | /* |
b2f0091f VD |
1355 | * In case the incoming frame's exchange is originated from |
1356 | * the initiator, then received frame's exchange id is ANDed | |
1357 | * with fc_cpu_mask bits to get the same cpu on which exchange | |
1358 | * was originated, otherwise just use the current cpu. | |
85b4aa49 | 1359 | */ |
b2f0091f VD |
1360 | if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) |
1361 | cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; | |
064287ee | 1362 | else { |
b2f0091f | 1363 | cpu = smp_processor_id(); |
5e5e92df | 1364 | |
064287ee KP |
1365 | if ((fh->fh_type == FC_TYPE_FCP) && |
1366 | (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) { | |
1367 | do { | |
1368 | cpu = fcoe_select_cpu(cpu); | |
1369 | } while (!cpu_online(cpu)); | |
29bdd2bb KP |
1370 | } else if ((fh->fh_type == FC_TYPE_FCP) && |
1371 | (ntohs(fh->fh_rx_id) != FC_XID_UNKNOWN)) { | |
1372 | cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask; | |
1373 | } else | |
1374 | cpu = smp_processor_id(); | |
064287ee | 1375 | } |
8976f424 | 1376 | fps = &per_cpu(fcoe_percpu, cpu); |
85b4aa49 | 1377 | spin_lock_bh(&fps->fcoe_rx_list.lock); |
8976f424 RL |
1378 | if (unlikely(!fps->thread)) { |
1379 | /* | |
1380 | * The targeted CPU is not ready, let's target | |
1381 | * the first CPU now. For non-SMP systems this | |
1382 | * will check the same CPU twice. | |
1383 | */ | |
1875f27e | 1384 | FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread " |
d5488eb9 RL |
1385 | "ready for incoming skb- using first online " |
1386 | "CPU.\n"); | |
8976f424 RL |
1387 | |
1388 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
6957177f | 1389 | cpu = cpumask_first(cpu_online_mask); |
8976f424 RL |
1390 | fps = &per_cpu(fcoe_percpu, cpu); |
1391 | spin_lock_bh(&fps->fcoe_rx_list.lock); | |
1392 | if (!fps->thread) { | |
1393 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1394 | goto err; | |
1395 | } | |
1396 | } | |
1397 | ||
1398 | /* | |
1399 | * We now have a valid CPU that we're targeting for | |
1400 | * this skb. We also have this receive thread locked, | |
1401 | * so we're free to queue skbs into it's queue. | |
1402 | */ | |
85b4aa49 | 1403 | |
859b7b64 CL |
1404 | /* If this is a SCSI-FCP frame, and this is already executing on the |
1405 | * correct CPU, and the queue for this CPU is empty, then go ahead | |
1406 | * and process the frame directly in the softirq context. | |
1407 | * This lets us process completions without context switching from the | |
1408 | * NET_RX softirq, to our receive processing thread, and then back to | |
1409 | * BLOCK softirq context. | |
1410 | */ | |
1411 | if (fh->fh_type == FC_TYPE_FCP && | |
1412 | cpu == smp_processor_id() && | |
1413 | skb_queue_empty(&fps->fcoe_rx_list)) { | |
1414 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1415 | fcoe_recv_frame(skb); | |
1416 | } else { | |
1417 | __skb_queue_tail(&fps->fcoe_rx_list, skb); | |
1418 | if (fps->fcoe_rx_list.qlen == 1) | |
1419 | wake_up_process(fps->thread); | |
1420 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1421 | } | |
85b4aa49 RL |
1422 | |
1423 | return 0; | |
1424 | err: | |
f018b73a JE |
1425 | per_cpu_ptr(lport->dev_stats, get_cpu())->ErrorFrames++; |
1426 | put_cpu(); | |
85b4aa49 RL |
1427 | err2: |
1428 | kfree_skb(skb); | |
1429 | return -1; | |
1430 | } | |
85b4aa49 RL |
1431 | |
1432 | /** | |
8597ae8b | 1433 | * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC |
1875f27e RL |
1434 | * @skb: The packet to be transmitted |
1435 | * @tlen: The total length of the trailer | |
1436 | * | |
85b4aa49 | 1437 | * Returns: 0 for success |
34f42a07 | 1438 | */ |
8597ae8b | 1439 | static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen) |
85b4aa49 RL |
1440 | { |
1441 | struct fcoe_percpu_s *fps; | |
8597ae8b | 1442 | int rc; |
85b4aa49 | 1443 | |
5e5e92df | 1444 | fps = &get_cpu_var(fcoe_percpu); |
8597ae8b | 1445 | rc = fcoe_get_paged_crc_eof(skb, tlen, fps); |
5e5e92df | 1446 | put_cpu_var(fcoe_percpu); |
85b4aa49 | 1447 | |
8597ae8b | 1448 | return rc; |
85b4aa49 | 1449 | } |
85b4aa49 RL |
1450 | |
1451 | /** | |
1875f27e RL |
1452 | * fcoe_xmit() - Transmit a FCoE frame |
1453 | * @lport: The local port that the frame is to be transmitted for | |
1454 | * @fp: The frame to be transmitted | |
85b4aa49 | 1455 | * |
1875f27e | 1456 | * Return: 0 for success |
34f42a07 | 1457 | */ |
1875f27e | 1458 | int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) |
85b4aa49 | 1459 | { |
4bb6b515 | 1460 | int wlen; |
85b4aa49 RL |
1461 | u32 crc; |
1462 | struct ethhdr *eh; | |
1463 | struct fcoe_crc_eof *cp; | |
1464 | struct sk_buff *skb; | |
1465 | struct fcoe_dev_stats *stats; | |
1466 | struct fc_frame_header *fh; | |
1467 | unsigned int hlen; /* header length implies the version */ | |
1468 | unsigned int tlen; /* trailer length */ | |
1469 | unsigned int elen; /* eth header, may include vlan */ | |
1875f27e | 1470 | struct fcoe_port *port = lport_priv(lport); |
8597ae8b | 1471 | struct fcoe_interface *fcoe = port->priv; |
85b4aa49 RL |
1472 | u8 sof, eof; |
1473 | struct fcoe_hdr *hp; | |
1474 | ||
1475 | WARN_ON((fr_len(fp) % sizeof(u32)) != 0); | |
1476 | ||
85b4aa49 | 1477 | fh = fc_frame_header_get(fp); |
97c8389d JE |
1478 | skb = fp_skb(fp); |
1479 | wlen = skb->len / FCOE_WORD_TO_BYTE; | |
1480 | ||
1875f27e | 1481 | if (!lport->link_up) { |
3caf02ee | 1482 | kfree_skb(skb); |
97c8389d | 1483 | return 0; |
85b4aa49 RL |
1484 | } |
1485 | ||
9860eeb4 | 1486 | if (unlikely(fh->fh_type == FC_TYPE_ELS) && |
1875f27e | 1487 | fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb)) |
97c8389d JE |
1488 | return 0; |
1489 | ||
85b4aa49 RL |
1490 | sof = fr_sof(fp); |
1491 | eof = fr_eof(fp); | |
1492 | ||
4e57e1cb | 1493 | elen = sizeof(struct ethhdr); |
85b4aa49 RL |
1494 | hlen = sizeof(struct fcoe_hdr); |
1495 | tlen = sizeof(struct fcoe_crc_eof); | |
1496 | wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; | |
1497 | ||
1498 | /* crc offload */ | |
1875f27e | 1499 | if (likely(lport->crc_offload)) { |
39ca9a06 | 1500 | skb->ip_summed = CHECKSUM_PARTIAL; |
85b4aa49 RL |
1501 | skb->csum_start = skb_headroom(skb); |
1502 | skb->csum_offset = skb->len; | |
1503 | crc = 0; | |
1504 | } else { | |
1505 | skb->ip_summed = CHECKSUM_NONE; | |
1506 | crc = fcoe_fc_crc(fp); | |
1507 | } | |
1508 | ||
014f5c3f | 1509 | /* copy port crc and eof to the skb buff */ |
85b4aa49 RL |
1510 | if (skb_is_nonlinear(skb)) { |
1511 | skb_frag_t *frag; | |
8597ae8b | 1512 | if (fcoe_alloc_paged_crc_eof(skb, tlen)) { |
e9041581 | 1513 | kfree_skb(skb); |
85b4aa49 RL |
1514 | return -ENOMEM; |
1515 | } | |
1516 | frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; | |
1517 | cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ) | |
1518 | + frag->page_offset; | |
1519 | } else { | |
1520 | cp = (struct fcoe_crc_eof *)skb_put(skb, tlen); | |
1521 | } | |
1522 | ||
1523 | memset(cp, 0, sizeof(*cp)); | |
1524 | cp->fcoe_eof = eof; | |
1525 | cp->fcoe_crc32 = cpu_to_le32(~crc); | |
1526 | ||
1527 | if (skb_is_nonlinear(skb)) { | |
1528 | kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ); | |
1529 | cp = NULL; | |
1530 | } | |
1531 | ||
014f5c3f | 1532 | /* adjust skb network/transport offsets to match mac/fcoe/port */ |
85b4aa49 RL |
1533 | skb_push(skb, elen + hlen); |
1534 | skb_reset_mac_header(skb); | |
1535 | skb_reset_network_header(skb); | |
1536 | skb->mac_len = elen; | |
211c738d | 1537 | skb->protocol = htons(ETH_P_FCOE); |
3fe9a0ba | 1538 | skb->dev = fcoe->netdev; |
85b4aa49 RL |
1539 | |
1540 | /* fill up mac and fcoe headers */ | |
1541 | eh = eth_hdr(skb); | |
1542 | eh->h_proto = htons(ETH_P_FCOE); | |
cd229e42 | 1543 | memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN); |
3fe9a0ba | 1544 | if (fcoe->ctlr.map_dest) |
cd229e42 | 1545 | memcpy(eh->h_dest + 3, fh->fh_d_id, 3); |
85b4aa49 | 1546 | |
3fe9a0ba CL |
1547 | if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN)) |
1548 | memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN); | |
85b4aa49 | 1549 | else |
11b56188 | 1550 | memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); |
85b4aa49 RL |
1551 | |
1552 | hp = (struct fcoe_hdr *)(eh + 1); | |
1553 | memset(hp, 0, sizeof(*hp)); | |
1554 | if (FC_FCOE_VER) | |
1555 | FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); | |
1556 | hp->fcoe_sof = sof; | |
1557 | ||
39ca9a06 | 1558 | /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ |
1875f27e | 1559 | if (lport->seq_offload && fr_max_payload(fp)) { |
39ca9a06 YZ |
1560 | skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; |
1561 | skb_shinfo(skb)->gso_size = fr_max_payload(fp); | |
1562 | } else { | |
1563 | skb_shinfo(skb)->gso_type = 0; | |
1564 | skb_shinfo(skb)->gso_size = 0; | |
1565 | } | |
85b4aa49 | 1566 | /* update tx stats: regardless if LLD fails */ |
f018b73a | 1567 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); |
582b45bc RL |
1568 | stats->TxFrames++; |
1569 | stats->TxWords += wlen; | |
f018b73a | 1570 | put_cpu(); |
85b4aa49 RL |
1571 | |
1572 | /* send down to lld */ | |
1875f27e | 1573 | fr_dev(fp) = lport; |
014f5c3f | 1574 | if (port->fcoe_pending_queue.qlen) |
1875f27e | 1575 | fcoe_check_wait_queue(lport, skb); |
4bb6b515 | 1576 | else if (fcoe_start_io(skb)) |
1875f27e | 1577 | fcoe_check_wait_queue(lport, skb); |
85b4aa49 RL |
1578 | |
1579 | return 0; | |
1580 | } | |
85b4aa49 | 1581 | |
e7a51997 | 1582 | /** |
1875f27e RL |
1583 | * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion |
1584 | * @skb: The completed skb (argument required by destructor) | |
e7a51997 JE |
1585 | */ |
1586 | static void fcoe_percpu_flush_done(struct sk_buff *skb) | |
1587 | { | |
1588 | complete(&fcoe_flush_completion); | |
1589 | } | |
1590 | ||
52ee8321 VD |
1591 | /** |
1592 | * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC | |
1593 | * @lport: The local port the frame was received on | |
1594 | * @fp: The received frame | |
1595 | * | |
1596 | * Return: 0 on passing filtering checks | |
1597 | */ | |
1598 | static inline int fcoe_filter_frames(struct fc_lport *lport, | |
1599 | struct fc_frame *fp) | |
1600 | { | |
1601 | struct fcoe_interface *fcoe; | |
1602 | struct fc_frame_header *fh; | |
1603 | struct sk_buff *skb = (struct sk_buff *)fp; | |
1604 | struct fcoe_dev_stats *stats; | |
1605 | ||
1606 | /* | |
1607 | * We only check CRC if no offload is available and if it is | |
1608 | * it's solicited data, in which case, the FCP layer would | |
1609 | * check it during the copy. | |
1610 | */ | |
1611 | if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY) | |
1612 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; | |
1613 | else | |
1614 | fr_flags(fp) |= FCPHF_CRC_UNCHECKED; | |
1615 | ||
1616 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1617 | fh = fc_frame_header_get(fp); | |
1618 | if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP) | |
1619 | return 0; | |
1620 | ||
8597ae8b | 1621 | fcoe = ((struct fcoe_port *)lport_priv(lport))->priv; |
52ee8321 VD |
1622 | if (is_fip_mode(&fcoe->ctlr) && fc_frame_payload_op(fp) == ELS_LOGO && |
1623 | ntoh24(fh->fh_s_id) == FC_FID_FLOGI) { | |
1624 | FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n"); | |
1625 | return -EINVAL; | |
1626 | } | |
1627 | ||
f2f96d20 | 1628 | if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) || |
52ee8321 VD |
1629 | le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) { |
1630 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; | |
1631 | return 0; | |
1632 | } | |
1633 | ||
1634 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); | |
1635 | stats->InvalidCRCCount++; | |
1636 | if (stats->InvalidCRCCount < 5) | |
1637 | printk(KERN_WARNING "fcoe: dropping frame with CRC error\n"); | |
1638 | return -EINVAL; | |
1639 | } | |
1640 | ||
34f42a07 | 1641 | /** |
859b7b64 CL |
1642 | * fcoe_recv_frame() - process a single received frame |
1643 | * @skb: frame to process | |
85b4aa49 | 1644 | */ |
859b7b64 | 1645 | static void fcoe_recv_frame(struct sk_buff *skb) |
85b4aa49 | 1646 | { |
85b4aa49 | 1647 | u32 fr_len; |
1875f27e | 1648 | struct fc_lport *lport; |
85b4aa49 RL |
1649 | struct fcoe_rcv_info *fr; |
1650 | struct fcoe_dev_stats *stats; | |
85b4aa49 RL |
1651 | struct fcoe_crc_eof crc_eof; |
1652 | struct fc_frame *fp; | |
014f5c3f | 1653 | struct fcoe_port *port; |
85b4aa49 RL |
1654 | struct fcoe_hdr *hp; |
1655 | ||
859b7b64 CL |
1656 | fr = fcoe_dev_from_skb(skb); |
1657 | lport = fr->fr_dev; | |
1658 | if (unlikely(!lport)) { | |
1659 | if (skb->destructor != fcoe_percpu_flush_done) | |
1660 | FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb"); | |
1661 | kfree_skb(skb); | |
1662 | return; | |
1663 | } | |
1664 | ||
1665 | FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d " | |
1666 | "head:%p data:%p tail:%p end:%p sum:%d dev:%s", | |
1667 | skb->len, skb->data_len, | |
1668 | skb->head, skb->data, skb_tail_pointer(skb), | |
1669 | skb_end_pointer(skb), skb->csum, | |
1670 | skb->dev ? skb->dev->name : "<NULL>"); | |
1671 | ||
859b7b64 CL |
1672 | port = lport_priv(lport); |
1673 | if (skb_is_nonlinear(skb)) | |
1674 | skb_linearize(skb); /* not ideal */ | |
859b7b64 CL |
1675 | |
1676 | /* | |
1677 | * Frame length checks and setting up the header pointers | |
1678 | * was done in fcoe_rcv already. | |
1679 | */ | |
1680 | hp = (struct fcoe_hdr *) skb_network_header(skb); | |
859b7b64 | 1681 | |
f018b73a | 1682 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); |
859b7b64 CL |
1683 | if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { |
1684 | if (stats->ErrorFrames < 5) | |
1685 | printk(KERN_WARNING "fcoe: FCoE version " | |
1686 | "mismatch: The frame has " | |
1687 | "version %x, but the " | |
1688 | "initiator supports version " | |
1689 | "%x\n", FC_FCOE_DECAPS_VER(hp), | |
1690 | FC_FCOE_VER); | |
f018b73a | 1691 | goto drop; |
859b7b64 CL |
1692 | } |
1693 | ||
1694 | skb_pull(skb, sizeof(struct fcoe_hdr)); | |
1695 | fr_len = skb->len - sizeof(struct fcoe_crc_eof); | |
1696 | ||
1697 | stats->RxFrames++; | |
1698 | stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; | |
1699 | ||
1700 | fp = (struct fc_frame *)skb; | |
1701 | fc_frame_init(fp); | |
1702 | fr_dev(fp) = lport; | |
1703 | fr_sof(fp) = hp->fcoe_sof; | |
1704 | ||
1705 | /* Copy out the CRC and EOF trailer for access */ | |
f018b73a JE |
1706 | if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) |
1707 | goto drop; | |
859b7b64 CL |
1708 | fr_eof(fp) = crc_eof.fcoe_eof; |
1709 | fr_crc(fp) = crc_eof.fcoe_crc32; | |
f018b73a JE |
1710 | if (pskb_trim(skb, fr_len)) |
1711 | goto drop; | |
859b7b64 | 1712 | |
52ee8321 VD |
1713 | if (!fcoe_filter_frames(lport, fp)) { |
1714 | put_cpu(); | |
1715 | fc_exch_recv(lport, fp); | |
1716 | return; | |
859b7b64 | 1717 | } |
f018b73a JE |
1718 | drop: |
1719 | stats->ErrorFrames++; | |
1720 | put_cpu(); | |
1721 | kfree_skb(skb); | |
859b7b64 CL |
1722 | } |
1723 | ||
1724 | /** | |
1725 | * fcoe_percpu_receive_thread() - The per-CPU packet receive thread | |
1726 | * @arg: The per-CPU context | |
1727 | * | |
1728 | * Return: 0 for success | |
1729 | */ | |
1730 | int fcoe_percpu_receive_thread(void *arg) | |
1731 | { | |
1732 | struct fcoe_percpu_s *p = arg; | |
1733 | struct sk_buff *skb; | |
1734 | ||
4469c195 | 1735 | set_user_nice(current, -20); |
85b4aa49 RL |
1736 | |
1737 | while (!kthread_should_stop()) { | |
1738 | ||
1739 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1740 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) { | |
1741 | set_current_state(TASK_INTERRUPTIBLE); | |
1742 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1743 | schedule(); | |
1744 | set_current_state(TASK_RUNNING); | |
1745 | if (kthread_should_stop()) | |
1746 | return 0; | |
1747 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1748 | } | |
1749 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
859b7b64 | 1750 | fcoe_recv_frame(skb); |
85b4aa49 RL |
1751 | } |
1752 | return 0; | |
1753 | } | |
1754 | ||
85b4aa49 | 1755 | /** |
1875f27e | 1756 | * fcoe_dev_setup() - Setup the link change notification interface |
34f42a07 | 1757 | */ |
b0d428ad | 1758 | static void fcoe_dev_setup(void) |
85b4aa49 | 1759 | { |
85b4aa49 RL |
1760 | register_netdevice_notifier(&fcoe_notifier); |
1761 | } | |
1762 | ||
1763 | /** | |
1875f27e | 1764 | * fcoe_dev_cleanup() - Cleanup the link change notification interface |
34f42a07 | 1765 | */ |
85b4aa49 RL |
1766 | static void fcoe_dev_cleanup(void) |
1767 | { | |
1768 | unregister_netdevice_notifier(&fcoe_notifier); | |
1769 | } | |
1770 | ||
1771 | /** | |
1875f27e RL |
1772 | * fcoe_device_notification() - Handler for net device events |
1773 | * @notifier: The context of the notification | |
1774 | * @event: The type of event | |
1775 | * @ptr: The net device that the event was on | |
85b4aa49 | 1776 | * |
1875f27e | 1777 | * This function is called by the Ethernet driver in case of link change event. |
85b4aa49 RL |
1778 | * |
1779 | * Returns: 0 for success | |
34f42a07 | 1780 | */ |
85b4aa49 RL |
1781 | static int fcoe_device_notification(struct notifier_block *notifier, |
1782 | ulong event, void *ptr) | |
1783 | { | |
1875f27e | 1784 | struct fc_lport *lport = NULL; |
1d1b88dc | 1785 | struct net_device *netdev = ptr; |
014f5c3f | 1786 | struct fcoe_interface *fcoe; |
2e70e241 | 1787 | struct fcoe_port *port; |
85b4aa49 | 1788 | struct fcoe_dev_stats *stats; |
97c8389d | 1789 | u32 link_possible = 1; |
85b4aa49 RL |
1790 | u32 mfs; |
1791 | int rc = NOTIFY_OK; | |
1792 | ||
014f5c3f | 1793 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
25024989 | 1794 | if (fcoe->netdev == netdev) { |
1875f27e | 1795 | lport = fcoe->ctlr.lp; |
85b4aa49 RL |
1796 | break; |
1797 | } | |
1798 | } | |
1875f27e | 1799 | if (!lport) { |
85b4aa49 RL |
1800 | rc = NOTIFY_DONE; |
1801 | goto out; | |
1802 | } | |
1803 | ||
85b4aa49 RL |
1804 | switch (event) { |
1805 | case NETDEV_DOWN: | |
1806 | case NETDEV_GOING_DOWN: | |
97c8389d | 1807 | link_possible = 0; |
85b4aa49 RL |
1808 | break; |
1809 | case NETDEV_UP: | |
1810 | case NETDEV_CHANGE: | |
85b4aa49 RL |
1811 | break; |
1812 | case NETDEV_CHANGEMTU: | |
7221d7e5 YZ |
1813 | if (netdev->features & NETIF_F_FCOE_MTU) |
1814 | break; | |
1d1b88dc VD |
1815 | mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + |
1816 | sizeof(struct fcoe_crc_eof)); | |
85b4aa49 | 1817 | if (mfs >= FC_MIN_MAX_FRAME) |
1875f27e | 1818 | fc_set_mfs(lport, mfs); |
85b4aa49 RL |
1819 | break; |
1820 | case NETDEV_REGISTER: | |
1821 | break; | |
2e70e241 CL |
1822 | case NETDEV_UNREGISTER: |
1823 | list_del(&fcoe->list); | |
1824 | port = lport_priv(fcoe->ctlr.lp); | |
2ca32b48 | 1825 | queue_work(fcoe_wq, &port->destroy_work); |
2e70e241 CL |
1826 | goto out; |
1827 | break; | |
54a5b21d YZ |
1828 | case NETDEV_FEAT_CHANGE: |
1829 | fcoe_netdev_features_change(lport, netdev); | |
1830 | break; | |
85b4aa49 | 1831 | default: |
1d1b88dc | 1832 | FCOE_NETDEV_DBG(netdev, "Unknown event %ld " |
d5488eb9 | 1833 | "from netdev netlink\n", event); |
85b4aa49 | 1834 | } |
5e4f8fe7 RL |
1835 | |
1836 | fcoe_link_speed_update(lport); | |
1837 | ||
1875f27e | 1838 | if (link_possible && !fcoe_link_ok(lport)) |
3fe9a0ba CL |
1839 | fcoe_ctlr_link_up(&fcoe->ctlr); |
1840 | else if (fcoe_ctlr_link_down(&fcoe->ctlr)) { | |
f018b73a | 1841 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); |
97c8389d | 1842 | stats->LinkFailureCount++; |
f018b73a | 1843 | put_cpu(); |
1875f27e | 1844 | fcoe_clean_pending_queue(lport); |
85b4aa49 RL |
1845 | } |
1846 | out: | |
1847 | return rc; | |
1848 | } | |
1849 | ||
55a66d3c VD |
1850 | /** |
1851 | * fcoe_disable() - Disables a FCoE interface | |
78a58246 | 1852 | * @netdev : The net_device object the Ethernet interface to create on |
55a66d3c | 1853 | * |
78a58246 | 1854 | * Called from fcoe transport. |
55a66d3c VD |
1855 | * |
1856 | * Returns: 0 for success | |
1857 | */ | |
78a58246 | 1858 | static int fcoe_disable(struct net_device *netdev) |
55a66d3c VD |
1859 | { |
1860 | struct fcoe_interface *fcoe; | |
55a66d3c VD |
1861 | int rc = 0; |
1862 | ||
1863 | mutex_lock(&fcoe_config_mutex); | |
55a66d3c | 1864 | |
ee5df628 | 1865 | rtnl_lock(); |
55a66d3c VD |
1866 | fcoe = fcoe_hostlist_lookup_port(netdev); |
1867 | rtnl_unlock(); | |
1868 | ||
9ee50e48 | 1869 | if (fcoe) { |
9ee50e48 | 1870 | fcoe_ctlr_link_down(&fcoe->ctlr); |
9d4cbc05 | 1871 | fcoe_clean_pending_queue(fcoe->ctlr.lp); |
9ee50e48 | 1872 | } else |
55a66d3c VD |
1873 | rc = -ENODEV; |
1874 | ||
55a66d3c VD |
1875 | mutex_unlock(&fcoe_config_mutex); |
1876 | return rc; | |
1877 | } | |
1878 | ||
1879 | /** | |
1880 | * fcoe_enable() - Enables a FCoE interface | |
78a58246 | 1881 | * @netdev : The net_device object the Ethernet interface to create on |
55a66d3c | 1882 | * |
78a58246 | 1883 | * Called from fcoe transport. |
55a66d3c VD |
1884 | * |
1885 | * Returns: 0 for success | |
1886 | */ | |
78a58246 | 1887 | static int fcoe_enable(struct net_device *netdev) |
55a66d3c VD |
1888 | { |
1889 | struct fcoe_interface *fcoe; | |
55a66d3c VD |
1890 | int rc = 0; |
1891 | ||
1892 | mutex_lock(&fcoe_config_mutex); | |
ee5df628 | 1893 | rtnl_lock(); |
55a66d3c VD |
1894 | fcoe = fcoe_hostlist_lookup_port(netdev); |
1895 | rtnl_unlock(); | |
1896 | ||
9d4cbc05 | 1897 | if (!fcoe) |
55a66d3c | 1898 | rc = -ENODEV; |
9d4cbc05 VD |
1899 | else if (!fcoe_link_ok(fcoe->ctlr.lp)) |
1900 | fcoe_ctlr_link_up(&fcoe->ctlr); | |
55a66d3c | 1901 | |
55a66d3c VD |
1902 | mutex_unlock(&fcoe_config_mutex); |
1903 | return rc; | |
1904 | } | |
1905 | ||
85b4aa49 | 1906 | /** |
1875f27e | 1907 | * fcoe_destroy() - Destroy a FCoE interface |
78a58246 | 1908 | * @netdev : The net_device object the Ethernet interface to create on |
1875f27e | 1909 | * |
78a58246 | 1910 | * Called from fcoe transport |
85b4aa49 RL |
1911 | * |
1912 | * Returns: 0 for success | |
34f42a07 | 1913 | */ |
78a58246 | 1914 | static int fcoe_destroy(struct net_device *netdev) |
85b4aa49 | 1915 | { |
030f4e00 | 1916 | struct fcoe_interface *fcoe; |
f04ca1b6 | 1917 | struct fc_lport *lport; |
b2085a4e | 1918 | struct fcoe_port *port; |
8eca355f | 1919 | int rc = 0; |
85b4aa49 | 1920 | |
dfc1d0fe | 1921 | mutex_lock(&fcoe_config_mutex); |
ee5df628 | 1922 | rtnl_lock(); |
2e70e241 CL |
1923 | fcoe = fcoe_hostlist_lookup_port(netdev); |
1924 | if (!fcoe) { | |
85b4aa49 | 1925 | rc = -ENODEV; |
78a58246 | 1926 | goto out_nodev; |
85b4aa49 | 1927 | } |
f04ca1b6 | 1928 | lport = fcoe->ctlr.lp; |
b2085a4e | 1929 | port = lport_priv(lport); |
54a5b21d | 1930 | list_del(&fcoe->list); |
b2085a4e | 1931 | queue_work(fcoe_wq, &port->destroy_work); |
85b4aa49 | 1932 | out_nodev: |
b2085a4e | 1933 | rtnl_unlock(); |
dfc1d0fe | 1934 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 RL |
1935 | return rc; |
1936 | } | |
1937 | ||
1875f27e RL |
1938 | /** |
1939 | * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context | |
1940 | * @work: Handle to the FCoE port to be destroyed | |
1941 | */ | |
2e70e241 CL |
1942 | static void fcoe_destroy_work(struct work_struct *work) |
1943 | { | |
1944 | struct fcoe_port *port; | |
b2085a4e NP |
1945 | struct fcoe_interface *fcoe; |
1946 | int npiv = 0; | |
2e70e241 CL |
1947 | |
1948 | port = container_of(work, struct fcoe_port, destroy_work); | |
1949 | mutex_lock(&fcoe_config_mutex); | |
b2085a4e NP |
1950 | |
1951 | /* set if this is an NPIV port */ | |
1952 | npiv = port->lport->vport ? 1 : 0; | |
1953 | ||
1954 | fcoe = port->priv; | |
2e70e241 | 1955 | fcoe_if_destroy(port->lport); |
b2085a4e NP |
1956 | |
1957 | /* Do not tear down the fcoe interface for NPIV port */ | |
1958 | if (!npiv) { | |
1959 | rtnl_lock(); | |
1960 | fcoe_interface_cleanup(fcoe); | |
1961 | rtnl_unlock(); | |
1962 | } | |
1963 | ||
2e70e241 CL |
1964 | mutex_unlock(&fcoe_config_mutex); |
1965 | } | |
1966 | ||
78a58246 YZ |
1967 | /** |
1968 | * fcoe_match() - Check if the FCoE is supported on the given netdevice | |
1969 | * @netdev : The net_device object the Ethernet interface to create on | |
1970 | * | |
1971 | * Called from fcoe transport. | |
1972 | * | |
1973 | * Returns: always returns true as this is the default FCoE transport, | |
1974 | * i.e., support all netdevs. | |
1975 | */ | |
1976 | static bool fcoe_match(struct net_device *netdev) | |
1977 | { | |
1978 | return true; | |
1979 | } | |
1980 | ||
85b4aa49 | 1981 | /** |
1875f27e | 1982 | * fcoe_create() - Create a fcoe interface |
78a58246 YZ |
1983 | * @netdev : The net_device object the Ethernet interface to create on |
1984 | * @fip_mode: The FIP mode for this creation | |
1875f27e | 1985 | * |
78a58246 | 1986 | * Called from fcoe transport |
85b4aa49 RL |
1987 | * |
1988 | * Returns: 0 for success | |
34f42a07 | 1989 | */ |
78a58246 | 1990 | static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode) |
85b4aa49 | 1991 | { |
b2085a4e | 1992 | int rc = 0; |
030f4e00 | 1993 | struct fcoe_interface *fcoe; |
af7f85d9 | 1994 | struct fc_lport *lport; |
85b4aa49 | 1995 | |
dfc1d0fe | 1996 | mutex_lock(&fcoe_config_mutex); |
ee5df628 | 1997 | rtnl_lock(); |
34ce27bc | 1998 | |
85b4aa49 RL |
1999 | /* look for existing lport */ |
2000 | if (fcoe_hostlist_lookup(netdev)) { | |
2001 | rc = -EEXIST; | |
78a58246 | 2002 | goto out_nodev; |
85b4aa49 | 2003 | } |
85b4aa49 | 2004 | |
1dd454d9 | 2005 | fcoe = fcoe_interface_create(netdev, fip_mode); |
7287fb91 RL |
2006 | if (IS_ERR(fcoe)) { |
2007 | rc = PTR_ERR(fcoe); | |
78a58246 | 2008 | goto out_nodev; |
030f4e00 CL |
2009 | } |
2010 | ||
9a05753b | 2011 | lport = fcoe_if_create(fcoe, &netdev->dev, 0); |
af7f85d9 | 2012 | if (IS_ERR(lport)) { |
d5488eb9 | 2013 | printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", |
85b4aa49 | 2014 | netdev->name); |
85b4aa49 | 2015 | rc = -EIO; |
2e70e241 | 2016 | fcoe_interface_cleanup(fcoe); |
b2085a4e | 2017 | goto out_nodev; |
85b4aa49 | 2018 | } |
030f4e00 | 2019 | |
54b649f8 CL |
2020 | /* Make this the "master" N_Port */ |
2021 | fcoe->ctlr.lp = lport; | |
2022 | ||
c863df33 CL |
2023 | /* add to lports list */ |
2024 | fcoe_hostlist_add(lport); | |
2025 | ||
54b649f8 CL |
2026 | /* start FIP Discovery and FLOGI */ |
2027 | lport->boot_time = jiffies; | |
2028 | fc_fabric_login(lport); | |
2029 | if (!fcoe_link_ok(lport)) | |
2030 | fcoe_ctlr_link_up(&fcoe->ctlr); | |
030f4e00 | 2031 | |
85b4aa49 | 2032 | out_nodev: |
34ce27bc | 2033 | rtnl_unlock(); |
dfc1d0fe | 2034 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 RL |
2035 | return rc; |
2036 | } | |
2037 | ||
34f42a07 | 2038 | /** |
5e4f8fe7 RL |
2039 | * fcoe_link_speed_update() - Update the supported and actual link speeds |
2040 | * @lport: The local port to update speeds for | |
85b4aa49 | 2041 | * |
5e4f8fe7 RL |
2042 | * Returns: 0 if the ethtool query was successful |
2043 | * -1 if the ethtool query failed | |
85b4aa49 | 2044 | */ |
5e4f8fe7 | 2045 | int fcoe_link_speed_update(struct fc_lport *lport) |
85b4aa49 | 2046 | { |
8597ae8b | 2047 | struct net_device *netdev = fcoe_netdev(lport); |
8ae6daca | 2048 | struct ethtool_cmd ecmd; |
85b4aa49 | 2049 | |
5e4f8fe7 | 2050 | if (!dev_ethtool_get_settings(netdev, &ecmd)) { |
1875f27e | 2051 | lport->link_supported_speeds &= |
2f718d64 YZ |
2052 | ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT); |
2053 | if (ecmd.supported & (SUPPORTED_1000baseT_Half | | |
2054 | SUPPORTED_1000baseT_Full)) | |
1875f27e | 2055 | lport->link_supported_speeds |= FC_PORTSPEED_1GBIT; |
2f718d64 | 2056 | if (ecmd.supported & SUPPORTED_10000baseT_Full) |
1875f27e | 2057 | lport->link_supported_speeds |= |
2f718d64 | 2058 | FC_PORTSPEED_10GBIT; |
8ae6daca DD |
2059 | switch (ethtool_cmd_speed(&ecmd)) { |
2060 | case SPEED_1000: | |
1875f27e | 2061 | lport->link_speed = FC_PORTSPEED_1GBIT; |
8ae6daca DD |
2062 | break; |
2063 | case SPEED_10000: | |
1875f27e | 2064 | lport->link_speed = FC_PORTSPEED_10GBIT; |
8ae6daca DD |
2065 | break; |
2066 | } | |
2f718d64 YZ |
2067 | return 0; |
2068 | } | |
2069 | return -1; | |
85b4aa49 | 2070 | } |
85b4aa49 | 2071 | |
5e4f8fe7 RL |
2072 | /** |
2073 | * fcoe_link_ok() - Check if the link is OK for a local port | |
2074 | * @lport: The local port to check link on | |
2075 | * | |
2076 | * Returns: 0 if link is UP and OK, -1 if not | |
2077 | * | |
2078 | */ | |
2079 | int fcoe_link_ok(struct fc_lport *lport) | |
2080 | { | |
8597ae8b | 2081 | struct net_device *netdev = fcoe_netdev(lport); |
5e4f8fe7 RL |
2082 | |
2083 | if (netif_oper_up(netdev)) | |
2084 | return 0; | |
2085 | return -1; | |
2086 | } | |
2087 | ||
34f42a07 | 2088 | /** |
1875f27e RL |
2089 | * fcoe_percpu_clean() - Clear all pending skbs for an local port |
2090 | * @lport: The local port whose skbs are to be cleared | |
e7a51997 JE |
2091 | * |
2092 | * Must be called with fcoe_create_mutex held to single-thread completion. | |
2093 | * | |
2094 | * This flushes the pending skbs by adding a new skb to each queue and | |
2095 | * waiting until they are all freed. This assures us that not only are | |
2096 | * there no packets that will be handled by the lport, but also that any | |
2097 | * threads already handling packet have returned. | |
85b4aa49 | 2098 | */ |
1875f27e | 2099 | void fcoe_percpu_clean(struct fc_lport *lport) |
85b4aa49 | 2100 | { |
85b4aa49 RL |
2101 | struct fcoe_percpu_s *pp; |
2102 | struct fcoe_rcv_info *fr; | |
2103 | struct sk_buff_head *list; | |
2104 | struct sk_buff *skb, *next; | |
2105 | struct sk_buff *head; | |
5e5e92df | 2106 | unsigned int cpu; |
85b4aa49 | 2107 | |
5e5e92df RL |
2108 | for_each_possible_cpu(cpu) { |
2109 | pp = &per_cpu(fcoe_percpu, cpu); | |
2110 | spin_lock_bh(&pp->fcoe_rx_list.lock); | |
2111 | list = &pp->fcoe_rx_list; | |
2112 | head = list->next; | |
2113 | for (skb = head; skb != (struct sk_buff *)list; | |
2114 | skb = next) { | |
2115 | next = skb->next; | |
2116 | fr = fcoe_dev_from_skb(skb); | |
1875f27e | 2117 | if (fr->fr_dev == lport) { |
5e5e92df RL |
2118 | __skb_unlink(skb, list); |
2119 | kfree_skb(skb); | |
85b4aa49 | 2120 | } |
85b4aa49 | 2121 | } |
e7a51997 JE |
2122 | |
2123 | if (!pp->thread || !cpu_online(cpu)) { | |
2124 | spin_unlock_bh(&pp->fcoe_rx_list.lock); | |
2125 | continue; | |
2126 | } | |
2127 | ||
2128 | skb = dev_alloc_skb(0); | |
2129 | if (!skb) { | |
2130 | spin_unlock_bh(&pp->fcoe_rx_list.lock); | |
2131 | continue; | |
2132 | } | |
2133 | skb->destructor = fcoe_percpu_flush_done; | |
2134 | ||
2135 | __skb_queue_tail(&pp->fcoe_rx_list, skb); | |
2136 | if (pp->fcoe_rx_list.qlen == 1) | |
2137 | wake_up_process(pp->thread); | |
5e5e92df | 2138 | spin_unlock_bh(&pp->fcoe_rx_list.lock); |
e7a51997 JE |
2139 | |
2140 | wait_for_completion(&fcoe_flush_completion); | |
85b4aa49 RL |
2141 | } |
2142 | } | |
85b4aa49 | 2143 | |
34f42a07 | 2144 | /** |
1875f27e RL |
2145 | * fcoe_reset() - Reset a local port |
2146 | * @shost: The SCSI host associated with the local port to be reset | |
85b4aa49 | 2147 | * |
1875f27e | 2148 | * Returns: Always 0 (return value required by FC transport template) |
85b4aa49 RL |
2149 | */ |
2150 | int fcoe_reset(struct Scsi_Host *shost) | |
2151 | { | |
2152 | struct fc_lport *lport = shost_priv(shost); | |
d2f80952 VD |
2153 | struct fcoe_port *port = lport_priv(lport); |
2154 | struct fcoe_interface *fcoe = port->priv; | |
2155 | ||
2156 | fcoe_ctlr_link_down(&fcoe->ctlr); | |
2157 | fcoe_clean_pending_queue(fcoe->ctlr.lp); | |
2158 | if (!fcoe_link_ok(fcoe->ctlr.lp)) | |
2159 | fcoe_ctlr_link_up(&fcoe->ctlr); | |
85b4aa49 RL |
2160 | return 0; |
2161 | } | |
85b4aa49 | 2162 | |
34f42a07 | 2163 | /** |
1875f27e RL |
2164 | * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device |
2165 | * @netdev: The net device used as a key | |
85b4aa49 | 2166 | * |
1875f27e RL |
2167 | * Locking: Must be called with the RNL mutex held. |
2168 | * | |
2169 | * Returns: NULL or the FCoE interface | |
85b4aa49 | 2170 | */ |
014f5c3f | 2171 | static struct fcoe_interface * |
1875f27e | 2172 | fcoe_hostlist_lookup_port(const struct net_device *netdev) |
85b4aa49 | 2173 | { |
014f5c3f | 2174 | struct fcoe_interface *fcoe; |
85b4aa49 | 2175 | |
014f5c3f | 2176 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
1875f27e | 2177 | if (fcoe->netdev == netdev) |
014f5c3f | 2178 | return fcoe; |
85b4aa49 | 2179 | } |
85b4aa49 RL |
2180 | return NULL; |
2181 | } | |
2182 | ||
34f42a07 | 2183 | /** |
1875f27e RL |
2184 | * fcoe_hostlist_lookup() - Find the local port associated with a |
2185 | * given net device | |
2186 | * @netdev: The netdevice used as a key | |
85b4aa49 | 2187 | * |
1875f27e RL |
2188 | * Locking: Must be called with the RTNL mutex held |
2189 | * | |
2190 | * Returns: NULL or the local port | |
85b4aa49 | 2191 | */ |
090eb6c4 | 2192 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) |
85b4aa49 | 2193 | { |
014f5c3f | 2194 | struct fcoe_interface *fcoe; |
85b4aa49 | 2195 | |
014f5c3f | 2196 | fcoe = fcoe_hostlist_lookup_port(netdev); |
3fe9a0ba | 2197 | return (fcoe) ? fcoe->ctlr.lp : NULL; |
85b4aa49 | 2198 | } |
85b4aa49 | 2199 | |
34f42a07 | 2200 | /** |
1875f27e RL |
2201 | * fcoe_hostlist_add() - Add the FCoE interface identified by a local |
2202 | * port to the hostlist | |
2203 | * @lport: The local port that identifies the FCoE interface to be added | |
85b4aa49 | 2204 | * |
090eb6c4 | 2205 | * Locking: must be called with the RTNL mutex held |
1875f27e RL |
2206 | * |
2207 | * Returns: 0 for success | |
85b4aa49 | 2208 | */ |
090eb6c4 | 2209 | static int fcoe_hostlist_add(const struct fc_lport *lport) |
85b4aa49 | 2210 | { |
014f5c3f CL |
2211 | struct fcoe_interface *fcoe; |
2212 | struct fcoe_port *port; | |
2213 | ||
2214 | fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); | |
2215 | if (!fcoe) { | |
2216 | port = lport_priv(lport); | |
8597ae8b | 2217 | fcoe = port->priv; |
014f5c3f | 2218 | list_add_tail(&fcoe->list, &fcoe_hostlist); |
85b4aa49 RL |
2219 | } |
2220 | return 0; | |
2221 | } | |
85b4aa49 | 2222 | |
78a58246 YZ |
2223 | |
2224 | static struct fcoe_transport fcoe_sw_transport = { | |
2225 | .name = {FCOE_TRANSPORT_DEFAULT}, | |
2226 | .attached = false, | |
2227 | .list = LIST_HEAD_INIT(fcoe_sw_transport.list), | |
2228 | .match = fcoe_match, | |
2229 | .create = fcoe_create, | |
2230 | .destroy = fcoe_destroy, | |
2231 | .enable = fcoe_enable, | |
2232 | .disable = fcoe_disable, | |
2233 | }; | |
2234 | ||
85b4aa49 | 2235 | /** |
1875f27e | 2236 | * fcoe_init() - Initialize fcoe.ko |
85b4aa49 | 2237 | * |
1875f27e | 2238 | * Returns: 0 on success, or a negative value on failure |
34f42a07 | 2239 | */ |
85b4aa49 RL |
2240 | static int __init fcoe_init(void) |
2241 | { | |
1875f27e | 2242 | struct fcoe_percpu_s *p; |
38eccabd | 2243 | unsigned int cpu; |
8976f424 | 2244 | int rc = 0; |
85b4aa49 | 2245 | |
2ca32b48 TH |
2246 | fcoe_wq = alloc_workqueue("fcoe", 0, 0); |
2247 | if (!fcoe_wq) | |
2248 | return -ENOMEM; | |
2249 | ||
78a58246 YZ |
2250 | /* register as a fcoe transport */ |
2251 | rc = fcoe_transport_attach(&fcoe_sw_transport); | |
2252 | if (rc) { | |
2253 | printk(KERN_ERR "failed to register an fcoe transport, check " | |
2254 | "if libfcoe is loaded\n"); | |
2255 | return rc; | |
2256 | } | |
2257 | ||
dfc1d0fe CL |
2258 | mutex_lock(&fcoe_config_mutex); |
2259 | ||
38eccabd | 2260 | for_each_possible_cpu(cpu) { |
5e5e92df | 2261 | p = &per_cpu(fcoe_percpu, cpu); |
38eccabd RL |
2262 | skb_queue_head_init(&p->fcoe_rx_list); |
2263 | } | |
2264 | ||
8976f424 RL |
2265 | for_each_online_cpu(cpu) |
2266 | fcoe_percpu_thread_create(cpu); | |
85b4aa49 | 2267 | |
8976f424 RL |
2268 | /* Initialize per CPU interrupt thread */ |
2269 | rc = register_hotcpu_notifier(&fcoe_cpu_notifier); | |
2270 | if (rc) | |
2271 | goto out_free; | |
85b4aa49 | 2272 | |
8976f424 | 2273 | /* Setup link change notification */ |
85b4aa49 RL |
2274 | fcoe_dev_setup(); |
2275 | ||
5892c32f CL |
2276 | rc = fcoe_if_init(); |
2277 | if (rc) | |
2278 | goto out_free; | |
85b4aa49 | 2279 | |
dfc1d0fe | 2280 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 | 2281 | return 0; |
8976f424 RL |
2282 | |
2283 | out_free: | |
2284 | for_each_online_cpu(cpu) { | |
2285 | fcoe_percpu_thread_destroy(cpu); | |
2286 | } | |
dfc1d0fe | 2287 | mutex_unlock(&fcoe_config_mutex); |
2ca32b48 | 2288 | destroy_workqueue(fcoe_wq); |
8976f424 | 2289 | return rc; |
85b4aa49 RL |
2290 | } |
2291 | module_init(fcoe_init); | |
2292 | ||
2293 | /** | |
1875f27e | 2294 | * fcoe_exit() - Clean up fcoe.ko |
85b4aa49 | 2295 | * |
1875f27e | 2296 | * Returns: 0 on success or a negative value on failure |
34f42a07 | 2297 | */ |
85b4aa49 RL |
2298 | static void __exit fcoe_exit(void) |
2299 | { | |
014f5c3f | 2300 | struct fcoe_interface *fcoe, *tmp; |
2e70e241 | 2301 | struct fcoe_port *port; |
1875f27e | 2302 | unsigned int cpu; |
85b4aa49 | 2303 | |
dfc1d0fe CL |
2304 | mutex_lock(&fcoe_config_mutex); |
2305 | ||
85b4aa49 RL |
2306 | fcoe_dev_cleanup(); |
2307 | ||
5919a595 | 2308 | /* releases the associated fcoe hosts */ |
090eb6c4 CL |
2309 | rtnl_lock(); |
2310 | list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { | |
c863df33 | 2311 | list_del(&fcoe->list); |
2e70e241 | 2312 | port = lport_priv(fcoe->ctlr.lp); |
2ca32b48 | 2313 | queue_work(fcoe_wq, &port->destroy_work); |
c863df33 | 2314 | } |
090eb6c4 | 2315 | rtnl_unlock(); |
85b4aa49 | 2316 | |
8976f424 RL |
2317 | unregister_hotcpu_notifier(&fcoe_cpu_notifier); |
2318 | ||
014f5c3f | 2319 | for_each_online_cpu(cpu) |
8976f424 | 2320 | fcoe_percpu_thread_destroy(cpu); |
85b4aa49 | 2321 | |
dfc1d0fe | 2322 | mutex_unlock(&fcoe_config_mutex); |
2e70e241 | 2323 | |
2ca32b48 TH |
2324 | /* |
2325 | * destroy_work's may be chained but destroy_workqueue() | |
2326 | * can take care of them. Just kill the fcoe_wq. | |
2327 | */ | |
2328 | destroy_workqueue(fcoe_wq); | |
2e70e241 | 2329 | |
2ca32b48 TH |
2330 | /* |
2331 | * Detaching from the scsi transport must happen after all | |
2332 | * destroys are done on the fcoe_wq. destroy_workqueue will | |
2333 | * enusre the fcoe_wq is flushed. | |
2334 | */ | |
2e70e241 | 2335 | fcoe_if_exit(); |
78a58246 YZ |
2336 | |
2337 | /* detach from fcoe transport */ | |
2338 | fcoe_transport_detach(&fcoe_sw_transport); | |
85b4aa49 RL |
2339 | } |
2340 | module_exit(fcoe_exit); | |
11b56188 CL |
2341 | |
2342 | /** | |
2343 | * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler | |
2344 | * @seq: active sequence in the FLOGI or FDISC exchange | |
2345 | * @fp: response frame, or error encoded in a pointer (timeout) | |
2346 | * @arg: pointer the the fcoe_ctlr structure | |
2347 | * | |
65155b37 | 2348 | * This handles MAC address management for FCoE, then passes control on to |
11b56188 CL |
2349 | * the libfc FLOGI response handler. |
2350 | */ | |
2351 | static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) | |
2352 | { | |
2353 | struct fcoe_ctlr *fip = arg; | |
2354 | struct fc_exch *exch = fc_seq_exch(seq); | |
2355 | struct fc_lport *lport = exch->lp; | |
2356 | u8 *mac; | |
2357 | ||
2358 | if (IS_ERR(fp)) | |
2359 | goto done; | |
2360 | ||
2361 | mac = fr_cb(fp)->granted_mac; | |
2362 | if (is_zero_ether_addr(mac)) { | |
2363 | /* pre-FIP */ | |
386309ce | 2364 | if (fcoe_ctlr_recv_flogi(fip, lport, fp)) { |
11b56188 CL |
2365 | fc_frame_free(fp); |
2366 | return; | |
2367 | } | |
11b56188 | 2368 | } |
386309ce | 2369 | fcoe_update_src_mac(lport, mac); |
11b56188 CL |
2370 | done: |
2371 | fc_lport_flogi_resp(seq, fp, lport); | |
2372 | } | |
2373 | ||
2374 | /** | |
2375 | * fcoe_logo_resp() - FCoE specific LOGO response handler | |
2376 | * @seq: active sequence in the LOGO exchange | |
2377 | * @fp: response frame, or error encoded in a pointer (timeout) | |
2378 | * @arg: pointer the the fcoe_ctlr structure | |
2379 | * | |
65155b37 | 2380 | * This handles MAC address management for FCoE, then passes control on to |
11b56188 CL |
2381 | * the libfc LOGO response handler. |
2382 | */ | |
2383 | static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) | |
2384 | { | |
386309ce | 2385 | struct fc_lport *lport = arg; |
11b56188 CL |
2386 | static u8 zero_mac[ETH_ALEN] = { 0 }; |
2387 | ||
2388 | if (!IS_ERR(fp)) | |
386309ce | 2389 | fcoe_update_src_mac(lport, zero_mac); |
11b56188 CL |
2390 | fc_lport_logo_resp(seq, fp, lport); |
2391 | } | |
2392 | ||
2393 | /** | |
2394 | * fcoe_elsct_send - FCoE specific ELS handler | |
2395 | * | |
2396 | * This does special case handling of FIP encapsualted ELS exchanges for FCoE, | |
2397 | * using FCoE specific response handlers and passing the FIP controller as | |
2398 | * the argument (the lport is still available from the exchange). | |
2399 | * | |
2400 | * Most of the work here is just handed off to the libfc routine. | |
2401 | */ | |
1875f27e RL |
2402 | static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, |
2403 | struct fc_frame *fp, unsigned int op, | |
2404 | void (*resp)(struct fc_seq *, | |
2405 | struct fc_frame *, | |
2406 | void *), | |
2407 | void *arg, u32 timeout) | |
11b56188 CL |
2408 | { |
2409 | struct fcoe_port *port = lport_priv(lport); | |
8597ae8b | 2410 | struct fcoe_interface *fcoe = port->priv; |
11b56188 CL |
2411 | struct fcoe_ctlr *fip = &fcoe->ctlr; |
2412 | struct fc_frame_header *fh = fc_frame_header_get(fp); | |
2413 | ||
2414 | switch (op) { | |
2415 | case ELS_FLOGI: | |
2416 | case ELS_FDISC: | |
e10f8c66 JE |
2417 | if (lport->point_to_multipoint) |
2418 | break; | |
11b56188 CL |
2419 | return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, |
2420 | fip, timeout); | |
2421 | case ELS_LOGO: | |
2422 | /* only hook onto fabric logouts, not port logouts */ | |
2423 | if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) | |
2424 | break; | |
2425 | return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, | |
386309ce | 2426 | lport, timeout); |
11b56188 CL |
2427 | } |
2428 | return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); | |
2429 | } | |
2430 | ||
9a05753b CL |
2431 | /** |
2432 | * fcoe_vport_create() - create an fc_host/scsi_host for a vport | |
2433 | * @vport: fc_vport object to create a new fc_host for | |
2434 | * @disabled: start the new fc_host in a disabled state by default? | |
2435 | * | |
2436 | * Returns: 0 for success | |
2437 | */ | |
2438 | static int fcoe_vport_create(struct fc_vport *vport, bool disabled) | |
2439 | { | |
2440 | struct Scsi_Host *shost = vport_to_shost(vport); | |
2441 | struct fc_lport *n_port = shost_priv(shost); | |
2442 | struct fcoe_port *port = lport_priv(n_port); | |
8597ae8b | 2443 | struct fcoe_interface *fcoe = port->priv; |
9a05753b CL |
2444 | struct net_device *netdev = fcoe->netdev; |
2445 | struct fc_lport *vn_port; | |
bdf25218 NP |
2446 | int rc; |
2447 | char buf[32]; | |
2448 | ||
2449 | rc = fcoe_validate_vport_create(vport); | |
2450 | if (rc) { | |
2451 | wwn_to_str(vport->port_name, buf, sizeof(buf)); | |
2452 | printk(KERN_ERR "fcoe: Failed to create vport, " | |
2453 | "WWPN (0x%s) already exists\n", | |
2454 | buf); | |
2455 | return rc; | |
2456 | } | |
9a05753b CL |
2457 | |
2458 | mutex_lock(&fcoe_config_mutex); | |
2459 | vn_port = fcoe_if_create(fcoe, &vport->dev, 1); | |
2460 | mutex_unlock(&fcoe_config_mutex); | |
2461 | ||
2462 | if (IS_ERR(vn_port)) { | |
2463 | printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", | |
2464 | netdev->name); | |
2465 | return -EIO; | |
2466 | } | |
2467 | ||
2468 | if (disabled) { | |
2469 | fc_vport_set_state(vport, FC_VPORT_DISABLED); | |
2470 | } else { | |
2471 | vn_port->boot_time = jiffies; | |
2472 | fc_fabric_login(vn_port); | |
2473 | fc_vport_setlink(vn_port); | |
2474 | } | |
2475 | return 0; | |
2476 | } | |
2477 | ||
2478 | /** | |
2479 | * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport | |
2480 | * @vport: fc_vport object that is being destroyed | |
2481 | * | |
2482 | * Returns: 0 for success | |
2483 | */ | |
2484 | static int fcoe_vport_destroy(struct fc_vport *vport) | |
2485 | { | |
2486 | struct Scsi_Host *shost = vport_to_shost(vport); | |
2487 | struct fc_lport *n_port = shost_priv(shost); | |
2488 | struct fc_lport *vn_port = vport->dd_data; | |
2489 | struct fcoe_port *port = lport_priv(vn_port); | |
2490 | ||
2491 | mutex_lock(&n_port->lp_mutex); | |
2492 | list_del(&vn_port->list); | |
2493 | mutex_unlock(&n_port->lp_mutex); | |
2ca32b48 | 2494 | queue_work(fcoe_wq, &port->destroy_work); |
9a05753b CL |
2495 | return 0; |
2496 | } | |
2497 | ||
2498 | /** | |
2499 | * fcoe_vport_disable() - change vport state | |
2500 | * @vport: vport to bring online/offline | |
2501 | * @disable: should the vport be disabled? | |
2502 | */ | |
2503 | static int fcoe_vport_disable(struct fc_vport *vport, bool disable) | |
2504 | { | |
2505 | struct fc_lport *lport = vport->dd_data; | |
2506 | ||
2507 | if (disable) { | |
2508 | fc_vport_set_state(vport, FC_VPORT_DISABLED); | |
2509 | fc_fabric_logoff(lport); | |
2510 | } else { | |
2511 | lport->boot_time = jiffies; | |
2512 | fc_fabric_login(lport); | |
2513 | fc_vport_setlink(lport); | |
2514 | } | |
2515 | ||
2516 | return 0; | |
2517 | } | |
2518 | ||
dc8596d3 CL |
2519 | /** |
2520 | * fcoe_vport_set_symbolic_name() - append vport string to symbolic name | |
2521 | * @vport: fc_vport with a new symbolic name string | |
2522 | * | |
2523 | * After generating a new symbolic name string, a new RSPN_ID request is | |
2524 | * sent to the name server. There is no response handler, so if it fails | |
2525 | * for some reason it will not be retried. | |
2526 | */ | |
2527 | static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) | |
2528 | { | |
2529 | struct fc_lport *lport = vport->dd_data; | |
2530 | struct fc_frame *fp; | |
2531 | size_t len; | |
2532 | ||
2533 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, | |
2534 | "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, | |
2535 | fcoe_netdev(lport)->name, vport->symbolic_name); | |
2536 | ||
2537 | if (lport->state != LPORT_ST_READY) | |
2538 | return; | |
2539 | ||
2540 | len = strnlen(fc_host_symbolic_name(lport->host), 255); | |
2541 | fp = fc_frame_alloc(lport, | |
2542 | sizeof(struct fc_ct_hdr) + | |
2543 | sizeof(struct fc_ns_rspn) + len); | |
2544 | if (!fp) | |
2545 | return; | |
2546 | lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, | |
b94f8951 | 2547 | NULL, NULL, 3 * lport->r_a_tov); |
dc8596d3 | 2548 | } |
b84056bf YZ |
2549 | |
2550 | /** | |
2551 | * fcoe_get_lesb() - Fill the FCoE Link Error Status Block | |
2552 | * @lport: the local port | |
2553 | * @fc_lesb: the link error status block | |
2554 | */ | |
2555 | static void fcoe_get_lesb(struct fc_lport *lport, | |
2556 | struct fc_els_lesb *fc_lesb) | |
2557 | { | |
2558 | unsigned int cpu; | |
2559 | u32 lfc, vlfc, mdac; | |
2560 | struct fcoe_dev_stats *devst; | |
2561 | struct fcoe_fc_els_lesb *lesb; | |
28172739 | 2562 | struct rtnl_link_stats64 temp; |
b84056bf YZ |
2563 | struct net_device *netdev = fcoe_netdev(lport); |
2564 | ||
2565 | lfc = 0; | |
2566 | vlfc = 0; | |
2567 | mdac = 0; | |
2568 | lesb = (struct fcoe_fc_els_lesb *)fc_lesb; | |
2569 | memset(lesb, 0, sizeof(*lesb)); | |
2570 | for_each_possible_cpu(cpu) { | |
2571 | devst = per_cpu_ptr(lport->dev_stats, cpu); | |
2572 | lfc += devst->LinkFailureCount; | |
2573 | vlfc += devst->VLinkFailureCount; | |
2574 | mdac += devst->MissDiscAdvCount; | |
2575 | } | |
2576 | lesb->lesb_link_fail = htonl(lfc); | |
2577 | lesb->lesb_vlink_fail = htonl(vlfc); | |
2578 | lesb->lesb_miss_fka = htonl(mdac); | |
28172739 | 2579 | lesb->lesb_fcs_error = htonl(dev_get_stats(netdev, &temp)->rx_crc_errors); |
b84056bf | 2580 | } |
7d65b0df JE |
2581 | |
2582 | /** | |
2583 | * fcoe_set_port_id() - Callback from libfc when Port_ID is set. | |
2584 | * @lport: the local port | |
2585 | * @port_id: the port ID | |
2586 | * @fp: the received frame, if any, that caused the port_id to be set. | |
2587 | * | |
2588 | * This routine handles the case where we received a FLOGI and are | |
2589 | * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi() | |
2590 | * so it can set the non-mapped mode and gateway address. | |
2591 | * | |
2592 | * The FLOGI LS_ACC is handled by fcoe_flogi_resp(). | |
2593 | */ | |
2594 | static void fcoe_set_port_id(struct fc_lport *lport, | |
2595 | u32 port_id, struct fc_frame *fp) | |
2596 | { | |
2597 | struct fcoe_port *port = lport_priv(lport); | |
8597ae8b | 2598 | struct fcoe_interface *fcoe = port->priv; |
7d65b0df JE |
2599 | |
2600 | if (fp && fc_frame_payload_op(fp) == ELS_FLOGI) | |
2601 | fcoe_ctlr_recv_flogi(&fcoe->ctlr, lport, fp); | |
2602 | } | |
bdf25218 NP |
2603 | |
2604 | /** | |
2605 | * fcoe_validate_vport_create() - Validate a vport before creating it | |
2606 | * @vport: NPIV port to be created | |
2607 | * | |
2608 | * This routine is meant to add validation for a vport before creating it | |
2609 | * via fcoe_vport_create(). | |
2610 | * Current validations are: | |
2611 | * - WWPN supplied is unique for given lport | |
2612 | * | |
2613 | * | |
2614 | */ | |
2615 | static int fcoe_validate_vport_create(struct fc_vport *vport) | |
2616 | { | |
2617 | struct Scsi_Host *shost = vport_to_shost(vport); | |
2618 | struct fc_lport *n_port = shost_priv(shost); | |
2619 | struct fc_lport *vn_port; | |
2620 | int rc = 0; | |
2621 | char buf[32]; | |
2622 | ||
2623 | mutex_lock(&n_port->lp_mutex); | |
2624 | ||
2625 | wwn_to_str(vport->port_name, buf, sizeof(buf)); | |
2626 | /* Check if the wwpn is not same as that of the lport */ | |
2627 | if (!memcmp(&n_port->wwpn, &vport->port_name, sizeof(u64))) { | |
2628 | FCOE_DBG("vport WWPN 0x%s is same as that of the " | |
2629 | "base port WWPN\n", buf); | |
2630 | rc = -EINVAL; | |
2631 | goto out; | |
2632 | } | |
2633 | ||
2634 | /* Check if there is any existing vport with same wwpn */ | |
2635 | list_for_each_entry(vn_port, &n_port->vports, list) { | |
2636 | if (!memcmp(&vn_port->wwpn, &vport->port_name, sizeof(u64))) { | |
2637 | FCOE_DBG("vport with given WWPN 0x%s already " | |
2638 | "exists\n", buf); | |
2639 | rc = -EINVAL; | |
2640 | break; | |
2641 | } | |
2642 | } | |
2643 | ||
2644 | out: | |
2645 | mutex_unlock(&n_port->lp_mutex); | |
2646 | ||
2647 | return rc; | |
2648 | } |