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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> |
6f6c2aa3 | 34 | #include <net/dcbnl.h> |
35 | #include <net/dcbevent.h> | |
85b4aa49 RL |
36 | #include <scsi/scsi_tcq.h> |
37 | #include <scsi/scsicam.h> | |
38 | #include <scsi/scsi_transport.h> | |
39 | #include <scsi/scsi_transport_fc.h> | |
40 | #include <net/rtnetlink.h> | |
41 | ||
42 | #include <scsi/fc/fc_encaps.h> | |
97c8389d | 43 | #include <scsi/fc/fc_fip.h> |
8d55e507 | 44 | #include <scsi/fc/fc_fcoe.h> |
85b4aa49 RL |
45 | |
46 | #include <scsi/libfc.h> | |
47 | #include <scsi/fc_frame.h> | |
48 | #include <scsi/libfcoe.h> | |
85b4aa49 | 49 | |
fdd78027 | 50 | #include "fcoe.h" |
7f349142 | 51 | |
85b4aa49 RL |
52 | MODULE_AUTHOR("Open-FCoE.org"); |
53 | MODULE_DESCRIPTION("FCoE"); | |
9b34ecff | 54 | MODULE_LICENSE("GPL v2"); |
85b4aa49 | 55 | |
05cc7390 | 56 | /* Performance tuning parameters for fcoe */ |
860eca2b | 57 | static unsigned int fcoe_ddp_min = 4096; |
05cc7390 YZ |
58 | module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR); |
59 | MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \ | |
60 | "Direct Data Placement (DDP)."); | |
61 | ||
7c9c6841 BVA |
62 | unsigned int fcoe_debug_logging; |
63 | module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR); | |
64 | MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels"); | |
65 | ||
66 | static DEFINE_MUTEX(fcoe_config_mutex); | |
dfc1d0fe | 67 | |
2ca32b48 TH |
68 | static struct workqueue_struct *fcoe_wq; |
69 | ||
e7a51997 JE |
70 | /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */ |
71 | static DECLARE_COMPLETION(fcoe_flush_completion); | |
72 | ||
85b4aa49 | 73 | /* fcoe host list */ |
090eb6c4 | 74 | /* must only by accessed under the RTNL mutex */ |
7c9c6841 BVA |
75 | static LIST_HEAD(fcoe_hostlist); |
76 | static DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu); | |
85b4aa49 | 77 | |
dd3fd72e | 78 | /* Function Prototypes */ |
1875f27e | 79 | static int fcoe_reset(struct Scsi_Host *); |
fdd78027 VD |
80 | static int fcoe_xmit(struct fc_lport *, struct fc_frame *); |
81 | static int fcoe_rcv(struct sk_buff *, struct net_device *, | |
82 | struct packet_type *, struct net_device *); | |
1875f27e | 83 | static int fcoe_percpu_receive_thread(void *); |
1875f27e RL |
84 | static void fcoe_percpu_clean(struct fc_lport *); |
85 | static int fcoe_link_ok(struct fc_lport *); | |
fdd78027 VD |
86 | |
87 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); | |
88 | static int fcoe_hostlist_add(const struct fc_lport *); | |
f9184df3 | 89 | static void fcoe_hostlist_del(const struct fc_lport *); |
fdd78027 | 90 | |
85b4aa49 RL |
91 | static int fcoe_device_notification(struct notifier_block *, ulong, void *); |
92 | static void fcoe_dev_setup(void); | |
93 | static void fcoe_dev_cleanup(void); | |
1875f27e RL |
94 | static struct fcoe_interface |
95 | *fcoe_hostlist_lookup_port(const struct net_device *); | |
96 | ||
97 | static int fcoe_fip_recv(struct sk_buff *, struct net_device *, | |
98 | struct packet_type *, struct net_device *); | |
99 | ||
100 | static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *); | |
101 | static void fcoe_update_src_mac(struct fc_lport *, u8 *); | |
102 | static u8 *fcoe_get_src_mac(struct fc_lport *); | |
103 | static void fcoe_destroy_work(struct work_struct *); | |
104 | ||
105 | static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *, | |
106 | unsigned int); | |
107 | static int fcoe_ddp_done(struct fc_lport *, u16); | |
71f89491 YZ |
108 | static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *, |
109 | unsigned int); | |
1875f27e | 110 | static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *); |
6f6c2aa3 | 111 | static int fcoe_dcb_app_notification(struct notifier_block *notifier, |
112 | ulong event, void *ptr); | |
1875f27e | 113 | |
78a58246 YZ |
114 | static bool fcoe_match(struct net_device *netdev); |
115 | static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode); | |
116 | static int fcoe_destroy(struct net_device *netdev); | |
117 | static int fcoe_enable(struct net_device *netdev); | |
118 | static int fcoe_disable(struct net_device *netdev); | |
1875f27e | 119 | |
435c8667 RL |
120 | /* fcoe_syfs control interface handlers */ |
121 | static int fcoe_ctlr_alloc(struct net_device *netdev); | |
122 | static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev); | |
123 | ||
124 | ||
1875f27e RL |
125 | static struct fc_seq *fcoe_elsct_send(struct fc_lport *, |
126 | u32 did, struct fc_frame *, | |
127 | unsigned int op, | |
128 | void (*resp)(struct fc_seq *, | |
129 | struct fc_frame *, | |
130 | void *), | |
131 | void *, u32 timeout); | |
859b7b64 | 132 | static void fcoe_recv_frame(struct sk_buff *skb); |
1875f27e | 133 | |
1875f27e | 134 | /* notification function for packets from net device */ |
85b4aa49 RL |
135 | static struct notifier_block fcoe_notifier = { |
136 | .notifier_call = fcoe_device_notification, | |
137 | }; | |
138 | ||
1875f27e RL |
139 | /* notification function for CPU hotplug events */ |
140 | static struct notifier_block fcoe_cpu_notifier = { | |
141 | .notifier_call = fcoe_cpu_callback, | |
142 | }; | |
143 | ||
6f6c2aa3 | 144 | /* notification function for DCB events */ |
145 | static struct notifier_block dcb_notifier = { | |
146 | .notifier_call = fcoe_dcb_app_notification, | |
147 | }; | |
148 | ||
8ca86f84 YZ |
149 | static struct scsi_transport_template *fcoe_nport_scsi_transport; |
150 | static struct scsi_transport_template *fcoe_vport_scsi_transport; | |
7f349142 | 151 | |
1875f27e RL |
152 | static int fcoe_vport_destroy(struct fc_vport *); |
153 | static int fcoe_vport_create(struct fc_vport *, bool disabled); | |
154 | static int fcoe_vport_disable(struct fc_vport *, bool disable); | |
155 | static void fcoe_set_vport_symbolic_name(struct fc_vport *); | |
7d65b0df | 156 | static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *); |
8d55e507 RL |
157 | static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *); |
158 | ||
159 | static struct fcoe_sysfs_function_template fcoe_sysfs_templ = { | |
435c8667 RL |
160 | .set_fcoe_ctlr_mode = fcoe_ctlr_set_fip_mode, |
161 | .set_fcoe_ctlr_enabled = fcoe_ctlr_enabled, | |
8d55e507 RL |
162 | .get_fcoe_ctlr_link_fail = fcoe_ctlr_get_lesb, |
163 | .get_fcoe_ctlr_vlink_fail = fcoe_ctlr_get_lesb, | |
164 | .get_fcoe_ctlr_miss_fka = fcoe_ctlr_get_lesb, | |
165 | .get_fcoe_ctlr_symb_err = fcoe_ctlr_get_lesb, | |
166 | .get_fcoe_ctlr_err_block = fcoe_ctlr_get_lesb, | |
167 | .get_fcoe_ctlr_fcs_error = fcoe_ctlr_get_lesb, | |
168 | ||
169 | .get_fcoe_fcf_selected = fcoe_fcf_get_selected, | |
170 | .get_fcoe_fcf_vlan_id = fcoe_fcf_get_vlan_id, | |
171 | }; | |
1875f27e RL |
172 | |
173 | static struct libfc_function_template fcoe_libfc_fcn_templ = { | |
174 | .frame_send = fcoe_xmit, | |
175 | .ddp_setup = fcoe_ddp_setup, | |
176 | .ddp_done = fcoe_ddp_done, | |
71f89491 | 177 | .ddp_target = fcoe_ddp_target, |
1875f27e | 178 | .elsct_send = fcoe_elsct_send, |
b84056bf | 179 | .get_lesb = fcoe_get_lesb, |
7d65b0df | 180 | .lport_set_port_id = fcoe_set_port_id, |
1875f27e | 181 | }; |
9a05753b | 182 | |
7c9c6841 | 183 | static struct fc_function_template fcoe_nport_fc_functions = { |
7f349142 VD |
184 | .show_host_node_name = 1, |
185 | .show_host_port_name = 1, | |
186 | .show_host_supported_classes = 1, | |
187 | .show_host_supported_fc4s = 1, | |
188 | .show_host_active_fc4s = 1, | |
189 | .show_host_maxframe_size = 1, | |
9f71af2f NP |
190 | .show_host_serial_number = 1, |
191 | .show_host_manufacturer = 1, | |
192 | .show_host_model = 1, | |
193 | .show_host_model_description = 1, | |
194 | .show_host_hardware_version = 1, | |
195 | .show_host_driver_version = 1, | |
196 | .show_host_firmware_version = 1, | |
197 | .show_host_optionrom_version = 1, | |
7f349142 VD |
198 | |
199 | .show_host_port_id = 1, | |
200 | .show_host_supported_speeds = 1, | |
201 | .get_host_speed = fc_get_host_speed, | |
202 | .show_host_speed = 1, | |
203 | .show_host_port_type = 1, | |
204 | .get_host_port_state = fc_get_host_port_state, | |
205 | .show_host_port_state = 1, | |
206 | .show_host_symbolic_name = 1, | |
207 | ||
208 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
209 | .show_rport_maxframe_size = 1, | |
210 | .show_rport_supported_classes = 1, | |
211 | ||
212 | .show_host_fabric_name = 1, | |
213 | .show_starget_node_name = 1, | |
214 | .show_starget_port_name = 1, | |
215 | .show_starget_port_id = 1, | |
216 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
217 | .show_rport_dev_loss_tmo = 1, | |
218 | .get_fc_host_stats = fc_get_host_stats, | |
219 | .issue_fc_host_lip = fcoe_reset, | |
220 | ||
221 | .terminate_rport_io = fc_rport_terminate_io, | |
9a05753b CL |
222 | |
223 | .vport_create = fcoe_vport_create, | |
224 | .vport_delete = fcoe_vport_destroy, | |
225 | .vport_disable = fcoe_vport_disable, | |
dc8596d3 | 226 | .set_vport_symbolic_name = fcoe_set_vport_symbolic_name, |
a51ab396 SM |
227 | |
228 | .bsg_request = fc_lport_bsg_request, | |
7f349142 VD |
229 | }; |
230 | ||
7c9c6841 | 231 | static struct fc_function_template fcoe_vport_fc_functions = { |
e9084bb8 CL |
232 | .show_host_node_name = 1, |
233 | .show_host_port_name = 1, | |
234 | .show_host_supported_classes = 1, | |
235 | .show_host_supported_fc4s = 1, | |
236 | .show_host_active_fc4s = 1, | |
237 | .show_host_maxframe_size = 1, | |
7e5adcfb NP |
238 | .show_host_serial_number = 1, |
239 | .show_host_manufacturer = 1, | |
240 | .show_host_model = 1, | |
241 | .show_host_model_description = 1, | |
242 | .show_host_hardware_version = 1, | |
243 | .show_host_driver_version = 1, | |
244 | .show_host_firmware_version = 1, | |
245 | .show_host_optionrom_version = 1, | |
e9084bb8 CL |
246 | |
247 | .show_host_port_id = 1, | |
248 | .show_host_supported_speeds = 1, | |
249 | .get_host_speed = fc_get_host_speed, | |
250 | .show_host_speed = 1, | |
251 | .show_host_port_type = 1, | |
252 | .get_host_port_state = fc_get_host_port_state, | |
253 | .show_host_port_state = 1, | |
254 | .show_host_symbolic_name = 1, | |
255 | ||
256 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
257 | .show_rport_maxframe_size = 1, | |
258 | .show_rport_supported_classes = 1, | |
259 | ||
260 | .show_host_fabric_name = 1, | |
261 | .show_starget_node_name = 1, | |
262 | .show_starget_port_name = 1, | |
263 | .show_starget_port_id = 1, | |
264 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
265 | .show_rport_dev_loss_tmo = 1, | |
266 | .get_fc_host_stats = fc_get_host_stats, | |
267 | .issue_fc_host_lip = fcoe_reset, | |
268 | ||
269 | .terminate_rport_io = fc_rport_terminate_io, | |
a51ab396 SM |
270 | |
271 | .bsg_request = fc_lport_bsg_request, | |
e9084bb8 CL |
272 | }; |
273 | ||
7f349142 VD |
274 | static struct scsi_host_template fcoe_shost_template = { |
275 | .module = THIS_MODULE, | |
276 | .name = "FCoE Driver", | |
277 | .proc_name = FCOE_NAME, | |
278 | .queuecommand = fc_queuecommand, | |
279 | .eh_abort_handler = fc_eh_abort, | |
280 | .eh_device_reset_handler = fc_eh_device_reset, | |
281 | .eh_host_reset_handler = fc_eh_host_reset, | |
282 | .slave_alloc = fc_slave_alloc, | |
283 | .change_queue_depth = fc_change_queue_depth, | |
284 | .change_queue_type = fc_change_queue_type, | |
285 | .this_id = -1, | |
14caf44c | 286 | .cmd_per_lun = 3, |
7f349142 VD |
287 | .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, |
288 | .use_clustering = ENABLE_CLUSTERING, | |
289 | .sg_tablesize = SG_ALL, | |
290 | .max_sectors = 0xffff, | |
291 | }; | |
292 | ||
54b649f8 | 293 | /** |
1875f27e RL |
294 | * fcoe_interface_setup() - Setup a FCoE interface |
295 | * @fcoe: The new FCoE interface | |
296 | * @netdev: The net device that the fcoe interface is on | |
54b649f8 CL |
297 | * |
298 | * Returns : 0 for success | |
2e70e241 | 299 | * Locking: must be called with the RTNL mutex held |
54b649f8 CL |
300 | */ |
301 | static int fcoe_interface_setup(struct fcoe_interface *fcoe, | |
302 | struct net_device *netdev) | |
303 | { | |
619fe4be | 304 | struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); |
54b649f8 | 305 | struct netdev_hw_addr *ha; |
5bab87e6 | 306 | struct net_device *real_dev; |
54b649f8 | 307 | u8 flogi_maddr[ETH_ALEN]; |
b7a727f1 | 308 | const struct net_device_ops *ops; |
54b649f8 CL |
309 | |
310 | fcoe->netdev = netdev; | |
311 | ||
b7a727f1 YZ |
312 | /* Let LLD initialize for FCoE */ |
313 | ops = netdev->netdev_ops; | |
314 | if (ops->ndo_fcoe_enable) { | |
315 | if (ops->ndo_fcoe_enable(netdev)) | |
316 | FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE" | |
317 | " specific feature for LLD.\n"); | |
318 | } | |
319 | ||
54b649f8 | 320 | /* Do not support for bonding device */ |
cc8bdf06 | 321 | if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) { |
59d92516 | 322 | FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n"); |
54b649f8 CL |
323 | return -EOPNOTSUPP; |
324 | } | |
325 | ||
326 | /* look for SAN MAC address, if multiple SAN MACs exist, only | |
327 | * use the first one for SPMA */ | |
5bab87e6 YZ |
328 | real_dev = (netdev->priv_flags & IFF_802_1Q_VLAN) ? |
329 | vlan_dev_real_dev(netdev) : netdev; | |
d1483bb9 | 330 | fcoe->realdev = real_dev; |
54b649f8 | 331 | rcu_read_lock(); |
5bab87e6 | 332 | for_each_dev_addr(real_dev, ha) { |
54b649f8 | 333 | if ((ha->type == NETDEV_HW_ADDR_T_SAN) && |
bf361707 | 334 | (is_valid_ether_addr(ha->addr))) { |
54b649f8 CL |
335 | memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); |
336 | fip->spma = 1; | |
337 | break; | |
338 | } | |
339 | } | |
340 | rcu_read_unlock(); | |
341 | ||
342 | /* setup Source Mac Address */ | |
343 | if (!fip->spma) | |
344 | memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); | |
345 | ||
346 | /* | |
347 | * Add FCoE MAC address as second unicast MAC address | |
348 | * or enter promiscuous mode if not capable of listening | |
349 | * for multiple unicast MACs. | |
350 | */ | |
54b649f8 | 351 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
a748ee24 | 352 | dev_uc_add(netdev, flogi_maddr); |
54b649f8 | 353 | if (fip->spma) |
a748ee24 | 354 | dev_uc_add(netdev, fip->ctl_src_addr); |
e10f8c66 JE |
355 | if (fip->mode == FIP_MODE_VN2VN) { |
356 | dev_mc_add(netdev, FIP_ALL_VN2VN_MACS); | |
357 | dev_mc_add(netdev, FIP_ALL_P2P_MACS); | |
358 | } else | |
359 | dev_mc_add(netdev, FIP_ALL_ENODE_MACS); | |
54b649f8 CL |
360 | |
361 | /* | |
362 | * setup the receive function from ethernet driver | |
363 | * on the ethertype for the given device | |
364 | */ | |
365 | fcoe->fcoe_packet_type.func = fcoe_rcv; | |
366 | fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE); | |
367 | fcoe->fcoe_packet_type.dev = netdev; | |
368 | dev_add_pack(&fcoe->fcoe_packet_type); | |
369 | ||
370 | fcoe->fip_packet_type.func = fcoe_fip_recv; | |
371 | fcoe->fip_packet_type.type = htons(ETH_P_FIP); | |
372 | fcoe->fip_packet_type.dev = netdev; | |
373 | dev_add_pack(&fcoe->fip_packet_type); | |
374 | ||
375 | return 0; | |
376 | } | |
377 | ||
030f4e00 | 378 | /** |
1875f27e RL |
379 | * fcoe_interface_create() - Create a FCoE interface on a net device |
380 | * @netdev: The net device to create the FCoE interface on | |
1dd454d9 | 381 | * @fip_mode: The mode to use for FIP |
030f4e00 CL |
382 | * |
383 | * Returns: pointer to a struct fcoe_interface or NULL on error | |
384 | */ | |
1dd454d9 JE |
385 | static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev, |
386 | enum fip_state fip_mode) | |
030f4e00 | 387 | { |
8d55e507 | 388 | struct fcoe_ctlr_device *ctlr_dev; |
619fe4be | 389 | struct fcoe_ctlr *ctlr; |
030f4e00 | 390 | struct fcoe_interface *fcoe; |
619fe4be | 391 | int size; |
59d92516 | 392 | int err; |
030f4e00 | 393 | |
7287fb91 RL |
394 | if (!try_module_get(THIS_MODULE)) { |
395 | FCOE_NETDEV_DBG(netdev, | |
396 | "Could not get a reference to the module\n"); | |
397 | fcoe = ERR_PTR(-EBUSY); | |
398 | goto out; | |
399 | } | |
400 | ||
619fe4be | 401 | size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface); |
8d55e507 RL |
402 | ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ, |
403 | size); | |
404 | if (!ctlr_dev) { | |
405 | FCOE_DBG("Failed to add fcoe_ctlr_device\n"); | |
7287fb91 | 406 | fcoe = ERR_PTR(-ENOMEM); |
6f68794c | 407 | goto out_putmod; |
030f4e00 CL |
408 | } |
409 | ||
8d55e507 | 410 | ctlr = fcoe_ctlr_device_priv(ctlr_dev); |
9d34876f | 411 | ctlr->cdev = ctlr_dev; |
8d55e507 RL |
412 | fcoe = fcoe_ctlr_priv(ctlr); |
413 | ||
2e70e241 | 414 | dev_hold(netdev); |
54b649f8 CL |
415 | |
416 | /* | |
417 | * Initialize FIP. | |
418 | */ | |
619fe4be RL |
419 | fcoe_ctlr_init(ctlr, fip_mode); |
420 | ctlr->send = fcoe_fip_send; | |
421 | ctlr->update_mac = fcoe_update_src_mac; | |
422 | ctlr->get_src_addr = fcoe_get_src_mac; | |
54b649f8 | 423 | |
59d92516 | 424 | err = fcoe_interface_setup(fcoe, netdev); |
425 | if (err) { | |
619fe4be | 426 | fcoe_ctlr_destroy(ctlr); |
8d55e507 | 427 | fcoe_ctlr_device_delete(ctlr_dev); |
59d92516 | 428 | dev_put(netdev); |
7287fb91 | 429 | fcoe = ERR_PTR(err); |
6f68794c | 430 | goto out_putmod; |
59d92516 | 431 | } |
030f4e00 | 432 | |
7287fb91 RL |
433 | goto out; |
434 | ||
6f68794c | 435 | out_putmod: |
7287fb91 RL |
436 | module_put(THIS_MODULE); |
437 | out: | |
030f4e00 CL |
438 | return fcoe; |
439 | } | |
440 | ||
54b649f8 | 441 | /** |
433eba04 | 442 | * fcoe_interface_remove() - remove FCoE interface from netdev |
1875f27e | 443 | * @fcoe: The FCoE interface to be cleaned up |
2e70e241 CL |
444 | * |
445 | * Caller must be holding the RTNL mutex | |
54b649f8 | 446 | */ |
433eba04 | 447 | static void fcoe_interface_remove(struct fcoe_interface *fcoe) |
54b649f8 CL |
448 | { |
449 | struct net_device *netdev = fcoe->netdev; | |
619fe4be | 450 | struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); |
54b649f8 | 451 | u8 flogi_maddr[ETH_ALEN]; |
b7a727f1 | 452 | const struct net_device_ops *ops; |
54b649f8 CL |
453 | |
454 | /* | |
455 | * Don't listen for Ethernet packets anymore. | |
456 | * synchronize_net() ensures that the packet handlers are not running | |
457 | * on another CPU. dev_remove_pack() would do that, this calls the | |
458 | * unsyncronized version __dev_remove_pack() to avoid multiple delays. | |
459 | */ | |
460 | __dev_remove_pack(&fcoe->fcoe_packet_type); | |
461 | __dev_remove_pack(&fcoe->fip_packet_type); | |
462 | synchronize_net(); | |
463 | ||
54b649f8 | 464 | /* Delete secondary MAC addresses */ |
54b649f8 | 465 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
a748ee24 | 466 | dev_uc_del(netdev, flogi_maddr); |
54b649f8 | 467 | if (fip->spma) |
a748ee24 | 468 | dev_uc_del(netdev, fip->ctl_src_addr); |
e10f8c66 JE |
469 | if (fip->mode == FIP_MODE_VN2VN) { |
470 | dev_mc_del(netdev, FIP_ALL_VN2VN_MACS); | |
471 | dev_mc_del(netdev, FIP_ALL_P2P_MACS); | |
472 | } else | |
473 | dev_mc_del(netdev, FIP_ALL_ENODE_MACS); | |
b7a727f1 YZ |
474 | |
475 | /* Tell the LLD we are done w/ FCoE */ | |
476 | ops = netdev->netdev_ops; | |
477 | if (ops->ndo_fcoe_disable) { | |
478 | if (ops->ndo_fcoe_disable(netdev)) | |
479 | FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" | |
480 | " specific feature for LLD.\n"); | |
481 | } | |
433eba04 VD |
482 | fcoe->removed = 1; |
483 | } | |
484 | ||
485 | ||
486 | /** | |
487 | * fcoe_interface_cleanup() - Clean up a FCoE interface | |
488 | * @fcoe: The FCoE interface to be cleaned up | |
489 | */ | |
490 | static void fcoe_interface_cleanup(struct fcoe_interface *fcoe) | |
491 | { | |
492 | struct net_device *netdev = fcoe->netdev; | |
619fe4be | 493 | struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); |
b2085a4e | 494 | |
433eba04 VD |
495 | rtnl_lock(); |
496 | if (!fcoe->removed) | |
497 | fcoe_interface_remove(fcoe); | |
848e7d5b RL |
498 | rtnl_unlock(); |
499 | ||
b2085a4e | 500 | /* Release the self-reference taken during fcoe_interface_create() */ |
1a8ef414 RL |
501 | /* tear-down the FCoE controller */ |
502 | fcoe_ctlr_destroy(fip); | |
619fe4be | 503 | scsi_host_put(fip->lp->host); |
1a8ef414 RL |
504 | dev_put(netdev); |
505 | module_put(THIS_MODULE); | |
030f4e00 CL |
506 | } |
507 | ||
ab6b85c1 | 508 | /** |
1875f27e RL |
509 | * fcoe_fip_recv() - Handler for received FIP frames |
510 | * @skb: The receive skb | |
511 | * @netdev: The associated net device | |
512 | * @ptype: The packet_type structure which was used to register this handler | |
513 | * @orig_dev: The original net_device the the skb was received on. | |
514 | * (in case dev is a bond) | |
ab6b85c1 VD |
515 | * |
516 | * Returns: 0 for success | |
517 | */ | |
1875f27e | 518 | static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, |
ab6b85c1 VD |
519 | struct packet_type *ptype, |
520 | struct net_device *orig_dev) | |
521 | { | |
259ad85d | 522 | struct fcoe_interface *fcoe; |
619fe4be | 523 | struct fcoe_ctlr *ctlr; |
ab6b85c1 | 524 | |
259ad85d | 525 | fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); |
619fe4be RL |
526 | ctlr = fcoe_to_ctlr(fcoe); |
527 | fcoe_ctlr_recv(ctlr, skb); | |
ab6b85c1 VD |
528 | return 0; |
529 | } | |
530 | ||
980f5156 VD |
531 | /** |
532 | * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame | |
533 | * @port: The FCoE port | |
534 | * @skb: The FIP/FCoE packet to be sent | |
535 | */ | |
536 | static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb) | |
537 | { | |
538 | if (port->fcoe_pending_queue.qlen) | |
539 | fcoe_check_wait_queue(port->lport, skb); | |
540 | else if (fcoe_start_io(skb)) | |
541 | fcoe_check_wait_queue(port->lport, skb); | |
542 | } | |
543 | ||
ab6b85c1 | 544 | /** |
1875f27e RL |
545 | * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame |
546 | * @fip: The FCoE controller | |
547 | * @skb: The FIP packet to be sent | |
ab6b85c1 VD |
548 | */ |
549 | static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
550 | { | |
3fe9a0ba | 551 | skb->dev = fcoe_from_ctlr(fip)->netdev; |
980f5156 | 552 | fcoe_port_send(lport_priv(fip->lp), skb); |
ab6b85c1 VD |
553 | } |
554 | ||
555 | /** | |
1875f27e RL |
556 | * fcoe_update_src_mac() - Update the Ethernet MAC filters |
557 | * @lport: The local port to update the source MAC on | |
558 | * @addr: Unicast MAC address to add | |
ab6b85c1 VD |
559 | * |
560 | * Remove any previously-set unicast MAC filter. | |
561 | * Add secondary FCoE MAC address filter for our OUI. | |
562 | */ | |
11b56188 | 563 | static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) |
ab6b85c1 | 564 | { |
11b56188 | 565 | struct fcoe_port *port = lport_priv(lport); |
8597ae8b | 566 | struct fcoe_interface *fcoe = port->priv; |
25024989 | 567 | |
11b56188 | 568 | if (!is_zero_ether_addr(port->data_src_addr)) |
a748ee24 | 569 | dev_uc_del(fcoe->netdev, port->data_src_addr); |
11b56188 | 570 | if (!is_zero_ether_addr(addr)) |
a748ee24 | 571 | dev_uc_add(fcoe->netdev, addr); |
11b56188 | 572 | memcpy(port->data_src_addr, addr, ETH_ALEN); |
ab6b85c1 VD |
573 | } |
574 | ||
11b56188 CL |
575 | /** |
576 | * fcoe_get_src_mac() - return the Ethernet source address for an lport | |
577 | * @lport: libfc lport | |
578 | */ | |
579 | static u8 *fcoe_get_src_mac(struct fc_lport *lport) | |
580 | { | |
581 | struct fcoe_port *port = lport_priv(lport); | |
582 | ||
583 | return port->data_src_addr; | |
584 | } | |
585 | ||
7f349142 | 586 | /** |
1875f27e RL |
587 | * fcoe_lport_config() - Set up a local port |
588 | * @lport: The local port to be setup | |
7f349142 VD |
589 | * |
590 | * Returns: 0 for success | |
591 | */ | |
1875f27e | 592 | static int fcoe_lport_config(struct fc_lport *lport) |
7f349142 | 593 | { |
1875f27e RL |
594 | lport->link_up = 0; |
595 | lport->qfull = 0; | |
596 | lport->max_retry_count = 3; | |
597 | lport->max_rport_retry_count = 3; | |
598 | lport->e_d_tov = 2 * 1000; /* FC-FS default */ | |
599 | lport->r_a_tov = 2 * 2 * 1000; | |
600 | lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | | |
601 | FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); | |
602 | lport->does_npiv = 1; | |
603 | ||
604 | fc_lport_init_stats(lport); | |
7f349142 VD |
605 | |
606 | /* lport fc_lport related configuration */ | |
1875f27e | 607 | fc_lport_config(lport); |
7f349142 VD |
608 | |
609 | /* offload related configuration */ | |
1875f27e RL |
610 | lport->crc_offload = 0; |
611 | lport->seq_offload = 0; | |
612 | lport->lro_enabled = 0; | |
613 | lport->lro_xid = 0; | |
614 | lport->lso_max = 0; | |
7f349142 VD |
615 | |
616 | return 0; | |
617 | } | |
618 | ||
54a5b21d YZ |
619 | /** |
620 | * fcoe_netdev_features_change - Updates the lport's offload flags based | |
621 | * on the LLD netdev's FCoE feature flags | |
622 | */ | |
623 | static void fcoe_netdev_features_change(struct fc_lport *lport, | |
624 | struct net_device *netdev) | |
625 | { | |
626 | mutex_lock(&lport->lp_mutex); | |
627 | ||
628 | if (netdev->features & NETIF_F_SG) | |
629 | lport->sg_supp = 1; | |
630 | else | |
631 | lport->sg_supp = 0; | |
632 | ||
633 | if (netdev->features & NETIF_F_FCOE_CRC) { | |
634 | lport->crc_offload = 1; | |
635 | FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); | |
636 | } else { | |
637 | lport->crc_offload = 0; | |
638 | } | |
639 | ||
640 | if (netdev->features & NETIF_F_FSO) { | |
641 | lport->seq_offload = 1; | |
642 | lport->lso_max = netdev->gso_max_size; | |
643 | FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", | |
644 | lport->lso_max); | |
645 | } else { | |
646 | lport->seq_offload = 0; | |
647 | lport->lso_max = 0; | |
648 | } | |
649 | ||
650 | if (netdev->fcoe_ddp_xid) { | |
651 | lport->lro_enabled = 1; | |
652 | lport->lro_xid = netdev->fcoe_ddp_xid; | |
653 | FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", | |
654 | lport->lro_xid); | |
655 | } else { | |
656 | lport->lro_enabled = 0; | |
657 | lport->lro_xid = 0; | |
658 | } | |
659 | ||
660 | mutex_unlock(&lport->lp_mutex); | |
661 | } | |
662 | ||
7f349142 | 663 | /** |
1875f27e RL |
664 | * fcoe_netdev_config() - Set up net devive for SW FCoE |
665 | * @lport: The local port that is associated with the net device | |
666 | * @netdev: The associated net device | |
7f349142 | 667 | * |
1875f27e | 668 | * Must be called after fcoe_lport_config() as it will use local port mutex |
7f349142 | 669 | * |
1875f27e | 670 | * Returns: 0 for success |
7f349142 | 671 | */ |
1875f27e | 672 | static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) |
7f349142 VD |
673 | { |
674 | u32 mfs; | |
675 | u64 wwnn, wwpn; | |
25024989 | 676 | struct fcoe_interface *fcoe; |
619fe4be | 677 | struct fcoe_ctlr *ctlr; |
014f5c3f | 678 | struct fcoe_port *port; |
7f349142 VD |
679 | |
680 | /* Setup lport private data to point to fcoe softc */ | |
1875f27e | 681 | port = lport_priv(lport); |
8597ae8b | 682 | fcoe = port->priv; |
619fe4be | 683 | ctlr = fcoe_to_ctlr(fcoe); |
7f349142 VD |
684 | |
685 | /* | |
686 | * Determine max frame size based on underlying device and optional | |
687 | * user-configured limit. If the MFS is too low, fcoe_link_ok() | |
688 | * will return 0, so do this first. | |
689 | */ | |
7221d7e5 YZ |
690 | mfs = netdev->mtu; |
691 | if (netdev->features & NETIF_F_FCOE_MTU) { | |
692 | mfs = FCOE_MTU; | |
693 | FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); | |
694 | } | |
695 | mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); | |
1875f27e | 696 | if (fc_set_mfs(lport, mfs)) |
7f349142 VD |
697 | return -EINVAL; |
698 | ||
7f349142 | 699 | /* offload features support */ |
54a5b21d | 700 | fcoe_netdev_features_change(lport, netdev); |
7f349142 | 701 | |
014f5c3f CL |
702 | skb_queue_head_init(&port->fcoe_pending_queue); |
703 | port->fcoe_pending_queue_active = 0; | |
1875f27e | 704 | setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport); |
7f349142 | 705 | |
5e4f8fe7 RL |
706 | fcoe_link_speed_update(lport); |
707 | ||
1875f27e | 708 | if (!lport->vport) { |
dcece412 | 709 | if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN)) |
619fe4be | 710 | wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0); |
1875f27e | 711 | fc_set_wwnn(lport, wwnn); |
dcece412 | 712 | if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN)) |
619fe4be | 713 | wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, |
cf4aebca | 714 | 2, 0); |
1875f27e | 715 | fc_set_wwpn(lport, wwpn); |
9a05753b | 716 | } |
7f349142 | 717 | |
7f349142 VD |
718 | return 0; |
719 | } | |
720 | ||
721 | /** | |
1875f27e RL |
722 | * fcoe_shost_config() - Set up the SCSI host associated with a local port |
723 | * @lport: The local port | |
1875f27e | 724 | * @dev: The device associated with the SCSI host |
7f349142 VD |
725 | * |
726 | * Must be called after fcoe_lport_config() and fcoe_netdev_config() | |
727 | * | |
1875f27e | 728 | * Returns: 0 for success |
7f349142 | 729 | */ |
8ba00a4b | 730 | static int fcoe_shost_config(struct fc_lport *lport, struct device *dev) |
7f349142 VD |
731 | { |
732 | int rc = 0; | |
733 | ||
734 | /* lport scsi host config */ | |
1875f27e RL |
735 | lport->host->max_lun = FCOE_MAX_LUN; |
736 | lport->host->max_id = FCOE_MAX_FCP_TARGET; | |
737 | lport->host->max_channel = 0; | |
da87bfab VD |
738 | lport->host->max_cmd_len = FCOE_MAX_CMD_LEN; |
739 | ||
1875f27e | 740 | if (lport->vport) |
8ca86f84 | 741 | lport->host->transportt = fcoe_vport_scsi_transport; |
e9084bb8 | 742 | else |
8ca86f84 | 743 | lport->host->transportt = fcoe_nport_scsi_transport; |
7f349142 VD |
744 | |
745 | /* add the new host to the SCSI-ml */ | |
1875f27e | 746 | rc = scsi_add_host(lport->host, dev); |
7f349142 | 747 | if (rc) { |
1875f27e | 748 | FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " |
d5488eb9 | 749 | "error on scsi_add_host\n"); |
7f349142 VD |
750 | return rc; |
751 | } | |
9a05753b | 752 | |
1875f27e | 753 | if (!lport->vport) |
4be929be | 754 | fc_host_max_npiv_vports(lport->host) = USHRT_MAX; |
9a05753b | 755 | |
1875f27e | 756 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, |
5baa17c3 | 757 | "%s v%s over %s", FCOE_NAME, FCOE_VERSION, |
1875f27e | 758 | fcoe_netdev(lport)->name); |
7f349142 VD |
759 | |
760 | return 0; | |
761 | } | |
762 | ||
6fef3902 NP |
763 | |
764 | /** | |
765 | * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE | |
766 | * @lport: The local port that is associated with the net device | |
767 | * @netdev: The associated net device | |
768 | * | |
769 | * Must be called after fcoe_shost_config() as it will use local port mutex | |
770 | * | |
771 | */ | |
772 | static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev) | |
773 | { | |
774 | struct fcoe_interface *fcoe; | |
775 | struct fcoe_port *port; | |
776 | struct net_device *realdev; | |
777 | int rc; | |
6fef3902 NP |
778 | |
779 | port = lport_priv(lport); | |
780 | fcoe = port->priv; | |
781 | realdev = fcoe->realdev; | |
782 | ||
783 | if (!realdev) | |
784 | return; | |
785 | ||
786 | /* No FDMI state m/c for NPIV ports */ | |
787 | if (lport->vport) | |
788 | return; | |
789 | ||
790 | if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) { | |
f07d46bb NP |
791 | struct netdev_fcoe_hbainfo *fdmi; |
792 | fdmi = kzalloc(sizeof(*fdmi), GFP_KERNEL); | |
793 | if (!fdmi) | |
794 | return; | |
795 | ||
6fef3902 | 796 | rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev, |
f07d46bb | 797 | fdmi); |
6fef3902 NP |
798 | if (rc) { |
799 | printk(KERN_INFO "fcoe: Failed to retrieve FDMI " | |
800 | "information from netdev.\n"); | |
801 | return; | |
802 | } | |
803 | ||
804 | snprintf(fc_host_serial_number(lport->host), | |
805 | FC_SERIAL_NUMBER_SIZE, | |
806 | "%s", | |
f07d46bb | 807 | fdmi->serial_number); |
6fef3902 NP |
808 | snprintf(fc_host_manufacturer(lport->host), |
809 | FC_SERIAL_NUMBER_SIZE, | |
810 | "%s", | |
f07d46bb | 811 | fdmi->manufacturer); |
6fef3902 NP |
812 | snprintf(fc_host_model(lport->host), |
813 | FC_SYMBOLIC_NAME_SIZE, | |
814 | "%s", | |
f07d46bb | 815 | fdmi->model); |
6fef3902 NP |
816 | snprintf(fc_host_model_description(lport->host), |
817 | FC_SYMBOLIC_NAME_SIZE, | |
818 | "%s", | |
f07d46bb | 819 | fdmi->model_description); |
6fef3902 NP |
820 | snprintf(fc_host_hardware_version(lport->host), |
821 | FC_VERSION_STRING_SIZE, | |
822 | "%s", | |
f07d46bb | 823 | fdmi->hardware_version); |
6fef3902 NP |
824 | snprintf(fc_host_driver_version(lport->host), |
825 | FC_VERSION_STRING_SIZE, | |
826 | "%s", | |
f07d46bb | 827 | fdmi->driver_version); |
6fef3902 NP |
828 | snprintf(fc_host_optionrom_version(lport->host), |
829 | FC_VERSION_STRING_SIZE, | |
830 | "%s", | |
f07d46bb | 831 | fdmi->optionrom_version); |
6fef3902 NP |
832 | snprintf(fc_host_firmware_version(lport->host), |
833 | FC_VERSION_STRING_SIZE, | |
834 | "%s", | |
f07d46bb | 835 | fdmi->firmware_version); |
6fef3902 NP |
836 | |
837 | /* Enable FDMI lport states */ | |
838 | lport->fdmi_enabled = 1; | |
f07d46bb | 839 | kfree(fdmi); |
6fef3902 NP |
840 | } else { |
841 | lport->fdmi_enabled = 0; | |
842 | printk(KERN_INFO "fcoe: No FDMI support.\n"); | |
843 | } | |
844 | } | |
845 | ||
1875f27e RL |
846 | /** |
847 | * fcoe_oem_match() - The match routine for the offloaded exchange manager | |
848 | * @fp: The I/O frame | |
d7179680 | 849 | * |
1875f27e RL |
850 | * This routine will be associated with an exchange manager (EM). When |
851 | * the libfc exchange handling code is looking for an EM to use it will | |
852 | * call this routine and pass it the frame that it wishes to send. This | |
853 | * routine will return True if the associated EM is to be used and False | |
854 | * if the echange code should continue looking for an EM. | |
855 | * | |
856 | * The offload EM that this routine is associated with will handle any | |
857 | * packets that are for SCSI read requests. | |
858 | * | |
1ff9918b KP |
859 | * This has been enhanced to work when FCoE stack is operating in target |
860 | * mode. | |
861 | * | |
1875f27e | 862 | * Returns: True for read types I/O, otherwise returns false. |
d7179680 | 863 | */ |
7c9c6841 | 864 | static bool fcoe_oem_match(struct fc_frame *fp) |
d7179680 | 865 | { |
1ff9918b KP |
866 | struct fc_frame_header *fh = fc_frame_header_get(fp); |
867 | struct fcp_cmnd *fcp; | |
868 | ||
869 | if (fc_fcp_is_read(fr_fsp(fp)) && | |
870 | (fr_fsp(fp)->data_len > fcoe_ddp_min)) | |
871 | return true; | |
a762dce4 YZ |
872 | else if ((fr_fsp(fp) == NULL) && |
873 | (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) && | |
874 | (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) { | |
1ff9918b | 875 | fcp = fc_frame_payload_get(fp, sizeof(*fcp)); |
a762dce4 YZ |
876 | if ((fcp->fc_flags & FCP_CFL_WRDATA) && |
877 | (ntohl(fcp->fc_dl) > fcoe_ddp_min)) | |
1ff9918b KP |
878 | return true; |
879 | } | |
880 | return false; | |
d7179680 VD |
881 | } |
882 | ||
7f349142 | 883 | /** |
1875f27e RL |
884 | * fcoe_em_config() - Allocate and configure an exchange manager |
885 | * @lport: The local port that the new EM will be associated with | |
7f349142 | 886 | * |
1875f27e | 887 | * Returns: 0 on success |
7f349142 | 888 | */ |
1875f27e | 889 | static inline int fcoe_em_config(struct fc_lport *lport) |
7f349142 | 890 | { |
1875f27e | 891 | struct fcoe_port *port = lport_priv(lport); |
8597ae8b | 892 | struct fcoe_interface *fcoe = port->priv; |
25024989 | 893 | struct fcoe_interface *oldfcoe = NULL; |
1d1b88dc | 894 | struct net_device *old_real_dev, *cur_real_dev; |
d7179680 VD |
895 | u16 min_xid = FCOE_MIN_XID; |
896 | u16 max_xid = FCOE_MAX_XID; | |
897 | ||
898 | /* | |
899 | * Check if need to allocate an em instance for | |
900 | * offload exchange ids to be shared across all VN_PORTs/lport. | |
901 | */ | |
1875f27e RL |
902 | if (!lport->lro_enabled || !lport->lro_xid || |
903 | (lport->lro_xid >= max_xid)) { | |
904 | lport->lro_xid = 0; | |
d7179680 VD |
905 | goto skip_oem; |
906 | } | |
907 | ||
908 | /* | |
909 | * Reuse existing offload em instance in case | |
1d1b88dc | 910 | * it is already allocated on real eth device |
d7179680 | 911 | */ |
25024989 CL |
912 | if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
913 | cur_real_dev = vlan_dev_real_dev(fcoe->netdev); | |
1d1b88dc | 914 | else |
25024989 | 915 | cur_real_dev = fcoe->netdev; |
1d1b88dc | 916 | |
25024989 | 917 | list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { |
25024989 CL |
918 | if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
919 | old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); | |
1d1b88dc | 920 | else |
25024989 | 921 | old_real_dev = oldfcoe->netdev; |
1d1b88dc VD |
922 | |
923 | if (cur_real_dev == old_real_dev) { | |
991cbb60 | 924 | fcoe->oem = oldfcoe->oem; |
d7179680 VD |
925 | break; |
926 | } | |
927 | } | |
928 | ||
991cbb60 | 929 | if (fcoe->oem) { |
1875f27e | 930 | if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { |
d7179680 VD |
931 | printk(KERN_ERR "fcoe_em_config: failed to add " |
932 | "offload em:%p on interface:%s\n", | |
991cbb60 | 933 | fcoe->oem, fcoe->netdev->name); |
d7179680 VD |
934 | return -ENOMEM; |
935 | } | |
936 | } else { | |
1875f27e RL |
937 | fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, |
938 | FCOE_MIN_XID, lport->lro_xid, | |
939 | fcoe_oem_match); | |
991cbb60 | 940 | if (!fcoe->oem) { |
d7179680 VD |
941 | printk(KERN_ERR "fcoe_em_config: failed to allocate " |
942 | "em for offload exches on interface:%s\n", | |
25024989 | 943 | fcoe->netdev->name); |
d7179680 VD |
944 | return -ENOMEM; |
945 | } | |
946 | } | |
947 | ||
948 | /* | |
949 | * Exclude offload EM xid range from next EM xid range. | |
950 | */ | |
1875f27e | 951 | min_xid += lport->lro_xid + 1; |
d7179680 VD |
952 | |
953 | skip_oem: | |
1875f27e | 954 | if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { |
d7179680 | 955 | printk(KERN_ERR "fcoe_em_config: failed to " |
25024989 | 956 | "allocate em on interface %s\n", fcoe->netdev->name); |
7f349142 | 957 | return -ENOMEM; |
d7179680 | 958 | } |
7f349142 VD |
959 | |
960 | return 0; | |
961 | } | |
962 | ||
963 | /** | |
1875f27e RL |
964 | * fcoe_if_destroy() - Tear down a SW FCoE instance |
965 | * @lport: The local port to be destroyed | |
34ce27bc | 966 | * |
7f349142 | 967 | */ |
af7f85d9 | 968 | static void fcoe_if_destroy(struct fc_lport *lport) |
7f349142 | 969 | { |
b2085a4e NP |
970 | struct fcoe_port *port = lport_priv(lport); |
971 | struct fcoe_interface *fcoe = port->priv; | |
972 | struct net_device *netdev = fcoe->netdev; | |
973 | ||
974 | FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); | |
975 | ||
976 | /* Logout of the fabric */ | |
977 | fc_fabric_logoff(lport); | |
978 | ||
979 | /* Cleanup the fc_lport */ | |
980 | fc_lport_destroy(lport); | |
981 | ||
982 | /* Stop the transmit retry timer */ | |
983 | del_timer_sync(&port->timer); | |
984 | ||
985 | /* Free existing transmit skbs */ | |
986 | fcoe_clean_pending_queue(lport); | |
987 | ||
988 | rtnl_lock(); | |
989 | if (!is_zero_ether_addr(port->data_src_addr)) | |
990 | dev_uc_del(netdev, port->data_src_addr); | |
433eba04 VD |
991 | if (lport->vport) |
992 | synchronize_net(); | |
993 | else | |
994 | fcoe_interface_remove(fcoe); | |
b2085a4e NP |
995 | rtnl_unlock(); |
996 | ||
f161fb72 | 997 | /* Free queued packets for the per-CPU receive threads */ |
af7f85d9 | 998 | fcoe_percpu_clean(lport); |
f161fb72 | 999 | |
7f349142 | 1000 | /* Detach from the scsi-ml */ |
af7f85d9 CL |
1001 | fc_remove_host(lport->host); |
1002 | scsi_remove_host(lport->host); | |
7f349142 | 1003 | |
80e736f8 YZ |
1004 | /* Destroy lport scsi_priv */ |
1005 | fc_fcp_destroy(lport); | |
1006 | ||
7f349142 | 1007 | /* There are no more rports or I/O, free the EM */ |
af7f85d9 | 1008 | fc_exch_mgr_free(lport); |
7f349142 | 1009 | |
7f349142 | 1010 | /* Free memory used by statistical counters */ |
af7f85d9 | 1011 | fc_lport_free_stats(lport); |
7f349142 | 1012 | |
3cab4468 VD |
1013 | /* |
1014 | * Release the Scsi_Host for vport but hold on to | |
1015 | * master lport until it fcoe interface fully cleaned-up. | |
1016 | */ | |
1017 | if (lport->vport) | |
1018 | scsi_host_put(lport->host); | |
7f349142 VD |
1019 | } |
1020 | ||
1875f27e RL |
1021 | /** |
1022 | * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device | |
1023 | * @lport: The local port to setup DDP for | |
1024 | * @xid: The exchange ID for this DDP transfer | |
1025 | * @sgl: The scatterlist describing this transfer | |
1026 | * @sgc: The number of sg items | |
7f349142 | 1027 | * |
1875f27e | 1028 | * Returns: 0 if the DDP context was not configured |
7f349142 | 1029 | */ |
1875f27e RL |
1030 | static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, |
1031 | struct scatterlist *sgl, unsigned int sgc) | |
7f349142 | 1032 | { |
1875f27e | 1033 | struct net_device *netdev = fcoe_netdev(lport); |
7f349142 | 1034 | |
1875f27e RL |
1035 | if (netdev->netdev_ops->ndo_fcoe_ddp_setup) |
1036 | return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, | |
1037 | xid, sgl, | |
1038 | sgc); | |
7f349142 VD |
1039 | |
1040 | return 0; | |
1041 | } | |
1042 | ||
71f89491 YZ |
1043 | /** |
1044 | * fcoe_ddp_target() - Call a LLD's ddp_target through the net device | |
1045 | * @lport: The local port to setup DDP for | |
1046 | * @xid: The exchange ID for this DDP transfer | |
1047 | * @sgl: The scatterlist describing this transfer | |
1048 | * @sgc: The number of sg items | |
1049 | * | |
1050 | * Returns: 0 if the DDP context was not configured | |
1051 | */ | |
1052 | static int fcoe_ddp_target(struct fc_lport *lport, u16 xid, | |
1053 | struct scatterlist *sgl, unsigned int sgc) | |
1054 | { | |
1055 | struct net_device *netdev = fcoe_netdev(lport); | |
1056 | ||
1057 | if (netdev->netdev_ops->ndo_fcoe_ddp_target) | |
1058 | return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid, | |
1059 | sgl, sgc); | |
1060 | ||
1061 | return 0; | |
1062 | } | |
1063 | ||
1064 | ||
1875f27e RL |
1065 | /** |
1066 | * fcoe_ddp_done() - Call a LLD's ddp_done through the net device | |
1067 | * @lport: The local port to complete DDP on | |
1068 | * @xid: The exchange ID for this DDP transfer | |
7f349142 | 1069 | * |
1875f27e | 1070 | * Returns: the length of data that have been completed by DDP |
7f349142 | 1071 | */ |
1875f27e | 1072 | static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) |
7f349142 | 1073 | { |
1875f27e | 1074 | struct net_device *netdev = fcoe_netdev(lport); |
7f349142 | 1075 | |
1875f27e RL |
1076 | if (netdev->netdev_ops->ndo_fcoe_ddp_done) |
1077 | return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); | |
7f349142 VD |
1078 | return 0; |
1079 | } | |
1080 | ||
7f349142 | 1081 | /** |
1875f27e RL |
1082 | * fcoe_if_create() - Create a FCoE instance on an interface |
1083 | * @fcoe: The FCoE interface to create a local port on | |
1084 | * @parent: The device pointer to be the parent in sysfs for the SCSI host | |
1085 | * @npiv: Indicates if the port is a vport or not | |
7f349142 | 1086 | * |
1875f27e | 1087 | * Creates a fc_lport instance and a Scsi_Host instance and configure them. |
7f349142 | 1088 | * |
1875f27e | 1089 | * Returns: The allocated fc_lport or an error pointer |
7f349142 | 1090 | */ |
030f4e00 | 1091 | static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, |
9a05753b | 1092 | struct device *parent, int npiv) |
7f349142 | 1093 | { |
619fe4be | 1094 | struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); |
1875f27e | 1095 | struct net_device *netdev = fcoe->netdev; |
72fa396b | 1096 | struct fc_lport *lport, *n_port; |
014f5c3f | 1097 | struct fcoe_port *port; |
72fa396b | 1098 | struct Scsi_Host *shost; |
1875f27e | 1099 | int rc; |
9a05753b CL |
1100 | /* |
1101 | * parent is only a vport if npiv is 1, | |
1102 | * but we'll only use vport in that case so go ahead and set it | |
1103 | */ | |
1104 | struct fc_vport *vport = dev_to_vport(parent); | |
7f349142 | 1105 | |
d5488eb9 | 1106 | FCOE_NETDEV_DBG(netdev, "Create Interface\n"); |
7f349142 | 1107 | |
72fa396b VD |
1108 | if (!npiv) |
1109 | lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port)); | |
1110 | else | |
1111 | lport = libfc_vport_create(vport, sizeof(*port)); | |
1112 | ||
86221969 | 1113 | if (!lport) { |
d5488eb9 | 1114 | FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); |
af7f85d9 | 1115 | rc = -ENOMEM; |
030f4e00 | 1116 | goto out; |
7f349142 | 1117 | } |
014f5c3f | 1118 | port = lport_priv(lport); |
2e70e241 | 1119 | port->lport = lport; |
8597ae8b | 1120 | port->priv = fcoe; |
66524ec9 | 1121 | port->get_netdev = fcoe_netdev; |
8597ae8b BPG |
1122 | port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH; |
1123 | port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH; | |
2e70e241 | 1124 | INIT_WORK(&port->destroy_work, fcoe_destroy_work); |
7f349142 | 1125 | |
f9184df3 NH |
1126 | /* |
1127 | * Need to add the lport to the hostlist | |
1128 | * so we catch NETDEV_CHANGE events. | |
1129 | */ | |
1130 | fcoe_hostlist_add(lport); | |
1131 | ||
1875f27e | 1132 | /* configure a fc_lport including the exchange manager */ |
af7f85d9 | 1133 | rc = fcoe_lport_config(lport); |
7f349142 | 1134 | if (rc) { |
d5488eb9 RL |
1135 | FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " |
1136 | "interface\n"); | |
7f349142 VD |
1137 | goto out_host_put; |
1138 | } | |
1139 | ||
9a05753b | 1140 | if (npiv) { |
9f8f3aa6 CL |
1141 | FCOE_NETDEV_DBG(netdev, "Setting vport names, " |
1142 | "%16.16llx %16.16llx\n", | |
1875f27e | 1143 | vport->node_name, vport->port_name); |
9a05753b CL |
1144 | fc_set_wwnn(lport, vport->node_name); |
1145 | fc_set_wwpn(lport, vport->port_name); | |
1146 | } | |
1147 | ||
ab6b85c1 | 1148 | /* configure lport network properties */ |
af7f85d9 | 1149 | rc = fcoe_netdev_config(lport, netdev); |
ab6b85c1 | 1150 | if (rc) { |
d5488eb9 RL |
1151 | FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " |
1152 | "interface\n"); | |
54b649f8 | 1153 | goto out_lp_destroy; |
ab6b85c1 | 1154 | } |
97c8389d | 1155 | |
7f349142 | 1156 | /* configure lport scsi host properties */ |
8ba00a4b | 1157 | rc = fcoe_shost_config(lport, parent); |
7f349142 | 1158 | if (rc) { |
d5488eb9 RL |
1159 | FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " |
1160 | "interface\n"); | |
54b649f8 | 1161 | goto out_lp_destroy; |
7f349142 VD |
1162 | } |
1163 | ||
96316099 | 1164 | /* Initialize the library */ |
619fe4be | 1165 | rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1); |
7f349142 | 1166 | if (rc) { |
96316099 | 1167 | FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " |
d5488eb9 | 1168 | "interface\n"); |
96316099 | 1169 | goto out_lp_destroy; |
7f349142 VD |
1170 | } |
1171 | ||
6fef3902 NP |
1172 | /* Initialized FDMI information */ |
1173 | fcoe_fdmi_info(lport, netdev); | |
1174 | ||
72fa396b VD |
1175 | /* |
1176 | * fcoe_em_alloc() and fcoe_hostlist_add() both | |
1177 | * need to be atomic with respect to other changes to the | |
1178 | * hostlist since fcoe_em_alloc() looks for an existing EM | |
1179 | * instance on host list updated by fcoe_hostlist_add(). | |
1180 | * | |
1181 | * This is currently handled through the fcoe_config_mutex | |
1182 | * begin held. | |
1183 | */ | |
1184 | if (!npiv) | |
9a05753b CL |
1185 | /* lport exch manager allocation */ |
1186 | rc = fcoe_em_config(lport); | |
72fa396b VD |
1187 | else { |
1188 | shost = vport_to_shost(vport); | |
1189 | n_port = shost_priv(shost); | |
1190 | rc = fc_exch_mgr_list_clone(n_port, lport); | |
1191 | } | |
1192 | ||
1193 | if (rc) { | |
1194 | FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n"); | |
1195 | goto out_lp_destroy; | |
7f349142 VD |
1196 | } |
1197 | ||
af7f85d9 | 1198 | return lport; |
7f349142 VD |
1199 | |
1200 | out_lp_destroy: | |
af7f85d9 | 1201 | fc_exch_mgr_free(lport); |
7f349142 | 1202 | out_host_put: |
f9184df3 | 1203 | fcoe_hostlist_del(lport); |
af7f85d9 CL |
1204 | scsi_host_put(lport->host); |
1205 | out: | |
1206 | return ERR_PTR(rc); | |
7f349142 VD |
1207 | } |
1208 | ||
1209 | /** | |
1875f27e | 1210 | * fcoe_if_init() - Initialization routine for fcoe.ko |
7f349142 | 1211 | * |
1875f27e RL |
1212 | * Attaches the SW FCoE transport to the FC transport |
1213 | * | |
1214 | * Returns: 0 on success | |
7f349142 VD |
1215 | */ |
1216 | static int __init fcoe_if_init(void) | |
1217 | { | |
1218 | /* attach to scsi transport */ | |
8ca86f84 YZ |
1219 | fcoe_nport_scsi_transport = |
1220 | fc_attach_transport(&fcoe_nport_fc_functions); | |
1221 | fcoe_vport_scsi_transport = | |
1222 | fc_attach_transport(&fcoe_vport_fc_functions); | |
7f349142 | 1223 | |
8ca86f84 | 1224 | if (!fcoe_nport_scsi_transport) { |
d5488eb9 | 1225 | printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); |
7f349142 VD |
1226 | return -ENODEV; |
1227 | } | |
1228 | ||
1229 | return 0; | |
1230 | } | |
1231 | ||
1232 | /** | |
1875f27e RL |
1233 | * fcoe_if_exit() - Tear down fcoe.ko |
1234 | * | |
1235 | * Detaches the SW FCoE transport from the FC transport | |
7f349142 | 1236 | * |
1875f27e | 1237 | * Returns: 0 on success |
7f349142 | 1238 | */ |
7c9c6841 | 1239 | static int __exit fcoe_if_exit(void) |
7f349142 | 1240 | { |
8ca86f84 YZ |
1241 | fc_release_transport(fcoe_nport_scsi_transport); |
1242 | fc_release_transport(fcoe_vport_scsi_transport); | |
1243 | fcoe_nport_scsi_transport = NULL; | |
1244 | fcoe_vport_scsi_transport = NULL; | |
7f349142 VD |
1245 | return 0; |
1246 | } | |
1247 | ||
8976f424 | 1248 | /** |
1875f27e RL |
1249 | * fcoe_percpu_thread_create() - Create a receive thread for an online CPU |
1250 | * @cpu: The CPU index of the CPU to create a receive thread for | |
8976f424 RL |
1251 | */ |
1252 | static void fcoe_percpu_thread_create(unsigned int cpu) | |
1253 | { | |
1254 | struct fcoe_percpu_s *p; | |
1255 | struct task_struct *thread; | |
1256 | ||
1257 | p = &per_cpu(fcoe_percpu, cpu); | |
1258 | ||
5c609ff9 ED |
1259 | thread = kthread_create_on_node(fcoe_percpu_receive_thread, |
1260 | (void *)p, cpu_to_node(cpu), | |
1261 | "fcoethread/%d", cpu); | |
8976f424 | 1262 | |
e7a51997 | 1263 | if (likely(!IS_ERR(thread))) { |
8976f424 RL |
1264 | kthread_bind(thread, cpu); |
1265 | wake_up_process(thread); | |
1266 | ||
1267 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1268 | p->thread = thread; | |
1269 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1270 | } | |
1271 | } | |
1272 | ||
1273 | /** | |
1875f27e RL |
1274 | * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU |
1275 | * @cpu: The CPU index of the CPU whose receive thread is to be destroyed | |
8976f424 RL |
1276 | * |
1277 | * Destroys a per-CPU Rx thread. Any pending skbs are moved to the | |
1278 | * current CPU's Rx thread. If the thread being destroyed is bound to | |
1279 | * the CPU processing this context the skbs will be freed. | |
1280 | */ | |
1281 | static void fcoe_percpu_thread_destroy(unsigned int cpu) | |
1282 | { | |
1283 | struct fcoe_percpu_s *p; | |
1284 | struct task_struct *thread; | |
1285 | struct page *crc_eof; | |
1286 | struct sk_buff *skb; | |
1287 | #ifdef CONFIG_SMP | |
1288 | struct fcoe_percpu_s *p0; | |
f018b73a | 1289 | unsigned targ_cpu = get_cpu(); |
8976f424 RL |
1290 | #endif /* CONFIG_SMP */ |
1291 | ||
d5488eb9 | 1292 | FCOE_DBG("Destroying receive thread for CPU %d\n", cpu); |
8976f424 RL |
1293 | |
1294 | /* Prevent any new skbs from being queued for this CPU. */ | |
1295 | p = &per_cpu(fcoe_percpu, cpu); | |
1296 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1297 | thread = p->thread; | |
1298 | p->thread = NULL; | |
1299 | crc_eof = p->crc_eof_page; | |
1300 | p->crc_eof_page = NULL; | |
1301 | p->crc_eof_offset = 0; | |
1302 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1303 | ||
1304 | #ifdef CONFIG_SMP | |
1305 | /* | |
1306 | * Don't bother moving the skb's if this context is running | |
1307 | * on the same CPU that is having its thread destroyed. This | |
1308 | * can easily happen when the module is removed. | |
1309 | */ | |
1310 | if (cpu != targ_cpu) { | |
1311 | p0 = &per_cpu(fcoe_percpu, targ_cpu); | |
1312 | spin_lock_bh(&p0->fcoe_rx_list.lock); | |
1313 | if (p0->thread) { | |
d5488eb9 RL |
1314 | FCOE_DBG("Moving frames from CPU %d to CPU %d\n", |
1315 | cpu, targ_cpu); | |
8976f424 RL |
1316 | |
1317 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1318 | __skb_queue_tail(&p0->fcoe_rx_list, skb); | |
1319 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
1320 | } else { | |
1321 | /* | |
1322 | * The targeted CPU is not initialized and cannot accept | |
1875f27e | 1323 | * new skbs. Unlock the targeted CPU and drop the skbs |
8976f424 RL |
1324 | * on the CPU that is going offline. |
1325 | */ | |
1326 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1327 | kfree_skb(skb); | |
1328 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
1329 | } | |
1330 | } else { | |
1331 | /* | |
1332 | * This scenario occurs when the module is being removed | |
1333 | * and all threads are being destroyed. skbs will continue | |
1334 | * to be shifted from the CPU thread that is being removed | |
1335 | * to the CPU thread associated with the CPU that is processing | |
1336 | * the module removal. Once there is only one CPU Rx thread it | |
1337 | * will reach this case and we will drop all skbs and later | |
1338 | * stop the thread. | |
1339 | */ | |
1340 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1341 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1342 | kfree_skb(skb); | |
1343 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1344 | } | |
f018b73a | 1345 | put_cpu(); |
8976f424 RL |
1346 | #else |
1347 | /* | |
dd3fd72e | 1348 | * This a non-SMP scenario where the singular Rx thread is |
8976f424 RL |
1349 | * being removed. Free all skbs and stop the thread. |
1350 | */ | |
1351 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1352 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
1353 | kfree_skb(skb); | |
1354 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1355 | #endif | |
1356 | ||
1357 | if (thread) | |
1358 | kthread_stop(thread); | |
1359 | ||
1360 | if (crc_eof) | |
1361 | put_page(crc_eof); | |
1362 | } | |
1363 | ||
1364 | /** | |
1875f27e RL |
1365 | * fcoe_cpu_callback() - Handler for CPU hotplug events |
1366 | * @nfb: The callback data block | |
1367 | * @action: The event triggering the callback | |
1368 | * @hcpu: The index of the CPU that the event is for | |
8976f424 | 1369 | * |
1875f27e | 1370 | * This creates or destroys per-CPU data for fcoe |
8976f424 RL |
1371 | * |
1372 | * Returns NOTIFY_OK always. | |
1373 | */ | |
1374 | static int fcoe_cpu_callback(struct notifier_block *nfb, | |
1375 | unsigned long action, void *hcpu) | |
1376 | { | |
1377 | unsigned cpu = (unsigned long)hcpu; | |
1378 | ||
1379 | switch (action) { | |
1380 | case CPU_ONLINE: | |
1381 | case CPU_ONLINE_FROZEN: | |
d5488eb9 | 1382 | FCOE_DBG("CPU %x online: Create Rx thread\n", cpu); |
8976f424 RL |
1383 | fcoe_percpu_thread_create(cpu); |
1384 | break; | |
1385 | case CPU_DEAD: | |
1386 | case CPU_DEAD_FROZEN: | |
d5488eb9 | 1387 | FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu); |
8976f424 RL |
1388 | fcoe_percpu_thread_destroy(cpu); |
1389 | break; | |
1390 | default: | |
1391 | break; | |
1392 | } | |
1393 | return NOTIFY_OK; | |
1394 | } | |
1395 | ||
064287ee KP |
1396 | /** |
1397 | * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming | |
1398 | * command. | |
064287ee | 1399 | * |
d272281c VD |
1400 | * This routine selects next CPU based on cpumask to distribute |
1401 | * incoming requests in round robin. | |
064287ee | 1402 | * |
d272281c | 1403 | * Returns: int CPU number |
064287ee | 1404 | */ |
d272281c | 1405 | static inline unsigned int fcoe_select_cpu(void) |
064287ee KP |
1406 | { |
1407 | static unsigned int selected_cpu; | |
1408 | ||
d272281c VD |
1409 | selected_cpu = cpumask_next(selected_cpu, cpu_online_mask); |
1410 | if (selected_cpu >= nr_cpu_ids) | |
1411 | selected_cpu = cpumask_first(cpu_online_mask); | |
1412 | ||
064287ee KP |
1413 | return selected_cpu; |
1414 | } | |
1415 | ||
85b4aa49 | 1416 | /** |
1875f27e RL |
1417 | * fcoe_rcv() - Receive packets from a net device |
1418 | * @skb: The received packet | |
1419 | * @netdev: The net device that the packet was received on | |
1420 | * @ptype: The packet type context | |
1421 | * @olddev: The last device net device | |
85b4aa49 | 1422 | * |
1875f27e RL |
1423 | * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a |
1424 | * FC frame and passes the frame to libfc. | |
85b4aa49 RL |
1425 | * |
1426 | * Returns: 0 for success | |
34f42a07 | 1427 | */ |
7c9c6841 | 1428 | static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, |
85b4aa49 RL |
1429 | struct packet_type *ptype, struct net_device *olddev) |
1430 | { | |
1875f27e | 1431 | struct fc_lport *lport; |
85b4aa49 | 1432 | struct fcoe_rcv_info *fr; |
619fe4be | 1433 | struct fcoe_ctlr *ctlr; |
259ad85d | 1434 | struct fcoe_interface *fcoe; |
85b4aa49 | 1435 | struct fc_frame_header *fh; |
85b4aa49 | 1436 | struct fcoe_percpu_s *fps; |
519e5135 | 1437 | struct ethhdr *eh; |
b2f0091f | 1438 | unsigned int cpu; |
85b4aa49 | 1439 | |
259ad85d | 1440 | fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); |
619fe4be RL |
1441 | ctlr = fcoe_to_ctlr(fcoe); |
1442 | lport = ctlr->lp; | |
1875f27e | 1443 | if (unlikely(!lport)) { |
465b87bf | 1444 | FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n"); |
85b4aa49 RL |
1445 | goto err2; |
1446 | } | |
1875f27e | 1447 | if (!lport->link_up) |
97c8389d | 1448 | goto err2; |
85b4aa49 | 1449 | |
465b87bf BVA |
1450 | FCOE_NETDEV_DBG(netdev, |
1451 | "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n", | |
d5488eb9 RL |
1452 | skb->len, skb->data_len, skb->head, skb->data, |
1453 | skb_tail_pointer(skb), skb_end_pointer(skb), | |
1454 | skb->csum, skb->dev ? skb->dev->name : "<NULL>"); | |
85b4aa49 | 1455 | |
8b612434 NH |
1456 | |
1457 | skb = skb_share_check(skb, GFP_ATOMIC); | |
1458 | ||
1459 | if (skb == NULL) | |
1460 | return NET_RX_DROP; | |
1461 | ||
519e5135 | 1462 | eh = eth_hdr(skb); |
519e5135 | 1463 | |
619fe4be | 1464 | if (is_fip_mode(ctlr) && |
6942df7f | 1465 | !ether_addr_equal(eh->h_source, ctlr->dest_addr)) { |
519e5135 VD |
1466 | FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n", |
1467 | eh->h_source); | |
85b4aa49 RL |
1468 | goto err; |
1469 | } | |
1470 | ||
1471 | /* | |
1472 | * Check for minimum frame length, and make sure required FCoE | |
1473 | * and FC headers are pulled into the linear data area. | |
1474 | */ | |
1475 | if (unlikely((skb->len < FCOE_MIN_FRAME) || | |
1875f27e | 1476 | !pskb_may_pull(skb, FCOE_HEADER_LEN))) |
85b4aa49 RL |
1477 | goto err; |
1478 | ||
1479 | skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); | |
1480 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1481 | ||
0ee31cb5 RL |
1482 | if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) { |
1483 | FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n", | |
1484 | eh->h_dest); | |
1485 | goto err; | |
1486 | } | |
1487 | ||
85b4aa49 | 1488 | fr = fcoe_dev_from_skb(skb); |
1875f27e | 1489 | fr->fr_dev = lport; |
5e5e92df | 1490 | |
85b4aa49 | 1491 | /* |
b2f0091f VD |
1492 | * In case the incoming frame's exchange is originated from |
1493 | * the initiator, then received frame's exchange id is ANDed | |
1494 | * with fc_cpu_mask bits to get the same cpu on which exchange | |
d272281c VD |
1495 | * was originated, otherwise select cpu using rx exchange id |
1496 | * or fcoe_select_cpu(). | |
85b4aa49 | 1497 | */ |
b2f0091f VD |
1498 | if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) |
1499 | cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; | |
064287ee | 1500 | else { |
d272281c VD |
1501 | if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN) |
1502 | cpu = fcoe_select_cpu(); | |
1503 | else | |
29bdd2bb | 1504 | cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask; |
064287ee | 1505 | } |
324f6678 VD |
1506 | |
1507 | if (cpu >= nr_cpu_ids) | |
1508 | goto err; | |
1509 | ||
8976f424 | 1510 | fps = &per_cpu(fcoe_percpu, cpu); |
94aa29f2 | 1511 | spin_lock(&fps->fcoe_rx_list.lock); |
8976f424 RL |
1512 | if (unlikely(!fps->thread)) { |
1513 | /* | |
1514 | * The targeted CPU is not ready, let's target | |
1515 | * the first CPU now. For non-SMP systems this | |
1516 | * will check the same CPU twice. | |
1517 | */ | |
1875f27e | 1518 | FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread " |
d5488eb9 RL |
1519 | "ready for incoming skb- using first online " |
1520 | "CPU.\n"); | |
8976f424 | 1521 | |
94aa29f2 | 1522 | spin_unlock(&fps->fcoe_rx_list.lock); |
6957177f | 1523 | cpu = cpumask_first(cpu_online_mask); |
8976f424 | 1524 | fps = &per_cpu(fcoe_percpu, cpu); |
94aa29f2 | 1525 | spin_lock(&fps->fcoe_rx_list.lock); |
8976f424 | 1526 | if (!fps->thread) { |
94aa29f2 | 1527 | spin_unlock(&fps->fcoe_rx_list.lock); |
8976f424 RL |
1528 | goto err; |
1529 | } | |
1530 | } | |
1531 | ||
1532 | /* | |
1533 | * We now have a valid CPU that we're targeting for | |
1534 | * this skb. We also have this receive thread locked, | |
1535 | * so we're free to queue skbs into it's queue. | |
1536 | */ | |
85b4aa49 | 1537 | |
5e70c4c4 NH |
1538 | /* |
1539 | * Note: We used to have a set of conditions under which we would | |
1540 | * call fcoe_recv_frame directly, rather than queuing to the rx list | |
1541 | * as it could save a few cycles, but doing so is prohibited, as | |
1542 | * fcoe_recv_frame has several paths that may sleep, which is forbidden | |
1543 | * in softirq context. | |
859b7b64 | 1544 | */ |
5e70c4c4 | 1545 | __skb_queue_tail(&fps->fcoe_rx_list, skb); |
20dc3811 | 1546 | if (fps->thread->state == TASK_INTERRUPTIBLE) |
5e70c4c4 | 1547 | wake_up_process(fps->thread); |
94aa29f2 | 1548 | spin_unlock(&fps->fcoe_rx_list.lock); |
85b4aa49 | 1549 | |
34bac2ef | 1550 | return NET_RX_SUCCESS; |
85b4aa49 | 1551 | err: |
1bd49b48 | 1552 | per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++; |
f018b73a | 1553 | put_cpu(); |
85b4aa49 RL |
1554 | err2: |
1555 | kfree_skb(skb); | |
34bac2ef | 1556 | return NET_RX_DROP; |
85b4aa49 | 1557 | } |
85b4aa49 RL |
1558 | |
1559 | /** | |
8597ae8b | 1560 | * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC |
1875f27e RL |
1561 | * @skb: The packet to be transmitted |
1562 | * @tlen: The total length of the trailer | |
1563 | * | |
85b4aa49 | 1564 | * Returns: 0 for success |
34f42a07 | 1565 | */ |
8597ae8b | 1566 | static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen) |
85b4aa49 RL |
1567 | { |
1568 | struct fcoe_percpu_s *fps; | |
8597ae8b | 1569 | int rc; |
85b4aa49 | 1570 | |
5e5e92df | 1571 | fps = &get_cpu_var(fcoe_percpu); |
8597ae8b | 1572 | rc = fcoe_get_paged_crc_eof(skb, tlen, fps); |
5e5e92df | 1573 | put_cpu_var(fcoe_percpu); |
85b4aa49 | 1574 | |
8597ae8b | 1575 | return rc; |
85b4aa49 | 1576 | } |
85b4aa49 RL |
1577 | |
1578 | /** | |
1875f27e RL |
1579 | * fcoe_xmit() - Transmit a FCoE frame |
1580 | * @lport: The local port that the frame is to be transmitted for | |
1581 | * @fp: The frame to be transmitted | |
85b4aa49 | 1582 | * |
1875f27e | 1583 | * Return: 0 for success |
34f42a07 | 1584 | */ |
7c9c6841 | 1585 | static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) |
85b4aa49 | 1586 | { |
4bb6b515 | 1587 | int wlen; |
85b4aa49 RL |
1588 | u32 crc; |
1589 | struct ethhdr *eh; | |
1590 | struct fcoe_crc_eof *cp; | |
1591 | struct sk_buff *skb; | |
1bd49b48 | 1592 | struct fc_stats *stats; |
85b4aa49 RL |
1593 | struct fc_frame_header *fh; |
1594 | unsigned int hlen; /* header length implies the version */ | |
1595 | unsigned int tlen; /* trailer length */ | |
1596 | unsigned int elen; /* eth header, may include vlan */ | |
1875f27e | 1597 | struct fcoe_port *port = lport_priv(lport); |
8597ae8b | 1598 | struct fcoe_interface *fcoe = port->priv; |
619fe4be | 1599 | struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); |
85b4aa49 RL |
1600 | u8 sof, eof; |
1601 | struct fcoe_hdr *hp; | |
1602 | ||
1603 | WARN_ON((fr_len(fp) % sizeof(u32)) != 0); | |
1604 | ||
85b4aa49 | 1605 | fh = fc_frame_header_get(fp); |
97c8389d JE |
1606 | skb = fp_skb(fp); |
1607 | wlen = skb->len / FCOE_WORD_TO_BYTE; | |
1608 | ||
1875f27e | 1609 | if (!lport->link_up) { |
3caf02ee | 1610 | kfree_skb(skb); |
97c8389d | 1611 | return 0; |
85b4aa49 RL |
1612 | } |
1613 | ||
9860eeb4 | 1614 | if (unlikely(fh->fh_type == FC_TYPE_ELS) && |
619fe4be | 1615 | fcoe_ctlr_els_send(ctlr, lport, skb)) |
97c8389d JE |
1616 | return 0; |
1617 | ||
85b4aa49 RL |
1618 | sof = fr_sof(fp); |
1619 | eof = fr_eof(fp); | |
1620 | ||
4e57e1cb | 1621 | elen = sizeof(struct ethhdr); |
85b4aa49 RL |
1622 | hlen = sizeof(struct fcoe_hdr); |
1623 | tlen = sizeof(struct fcoe_crc_eof); | |
1624 | wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; | |
1625 | ||
1626 | /* crc offload */ | |
1875f27e | 1627 | if (likely(lport->crc_offload)) { |
cf64bc8f | 1628 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
85b4aa49 RL |
1629 | skb->csum_start = skb_headroom(skb); |
1630 | skb->csum_offset = skb->len; | |
1631 | crc = 0; | |
1632 | } else { | |
1633 | skb->ip_summed = CHECKSUM_NONE; | |
1634 | crc = fcoe_fc_crc(fp); | |
1635 | } | |
1636 | ||
014f5c3f | 1637 | /* copy port crc and eof to the skb buff */ |
85b4aa49 RL |
1638 | if (skb_is_nonlinear(skb)) { |
1639 | skb_frag_t *frag; | |
8597ae8b | 1640 | if (fcoe_alloc_paged_crc_eof(skb, tlen)) { |
e9041581 | 1641 | kfree_skb(skb); |
85b4aa49 RL |
1642 | return -ENOMEM; |
1643 | } | |
1644 | frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; | |
77dfce07 | 1645 | cp = kmap_atomic(skb_frag_page(frag)) |
85b4aa49 RL |
1646 | + frag->page_offset; |
1647 | } else { | |
1648 | cp = (struct fcoe_crc_eof *)skb_put(skb, tlen); | |
1649 | } | |
1650 | ||
1651 | memset(cp, 0, sizeof(*cp)); | |
1652 | cp->fcoe_eof = eof; | |
1653 | cp->fcoe_crc32 = cpu_to_le32(~crc); | |
1654 | ||
1655 | if (skb_is_nonlinear(skb)) { | |
77dfce07 | 1656 | kunmap_atomic(cp); |
85b4aa49 RL |
1657 | cp = NULL; |
1658 | } | |
1659 | ||
014f5c3f | 1660 | /* adjust skb network/transport offsets to match mac/fcoe/port */ |
85b4aa49 RL |
1661 | skb_push(skb, elen + hlen); |
1662 | skb_reset_mac_header(skb); | |
1663 | skb_reset_network_header(skb); | |
1664 | skb->mac_len = elen; | |
211c738d | 1665 | skb->protocol = htons(ETH_P_FCOE); |
31c37a6f | 1666 | skb->priority = fcoe->priority; |
6f6c2aa3 | 1667 | |
d1483bb9 | 1668 | if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN && |
f646968f | 1669 | fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) { |
2884d423 | 1670 | /* must set skb->dev before calling vlan_put_tag */ |
d1483bb9 | 1671 | skb->dev = fcoe->realdev; |
2884d423 RL |
1672 | skb = __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), |
1673 | vlan_dev_vlan_id(fcoe->netdev)); | |
1674 | if (!skb) | |
1675 | return -ENOMEM; | |
d1483bb9 VD |
1676 | } else |
1677 | skb->dev = fcoe->netdev; | |
85b4aa49 RL |
1678 | |
1679 | /* fill up mac and fcoe headers */ | |
1680 | eh = eth_hdr(skb); | |
1681 | eh->h_proto = htons(ETH_P_FCOE); | |
619fe4be RL |
1682 | memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN); |
1683 | if (ctlr->map_dest) | |
cd229e42 | 1684 | memcpy(eh->h_dest + 3, fh->fh_d_id, 3); |
85b4aa49 | 1685 | |
619fe4be RL |
1686 | if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN)) |
1687 | memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN); | |
85b4aa49 | 1688 | else |
11b56188 | 1689 | memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); |
85b4aa49 RL |
1690 | |
1691 | hp = (struct fcoe_hdr *)(eh + 1); | |
1692 | memset(hp, 0, sizeof(*hp)); | |
1693 | if (FC_FCOE_VER) | |
1694 | FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); | |
1695 | hp->fcoe_sof = sof; | |
1696 | ||
39ca9a06 | 1697 | /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ |
1875f27e | 1698 | if (lport->seq_offload && fr_max_payload(fp)) { |
39ca9a06 YZ |
1699 | skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; |
1700 | skb_shinfo(skb)->gso_size = fr_max_payload(fp); | |
1701 | } else { | |
1702 | skb_shinfo(skb)->gso_type = 0; | |
1703 | skb_shinfo(skb)->gso_size = 0; | |
1704 | } | |
85b4aa49 | 1705 | /* update tx stats: regardless if LLD fails */ |
1bd49b48 | 1706 | stats = per_cpu_ptr(lport->stats, get_cpu()); |
582b45bc RL |
1707 | stats->TxFrames++; |
1708 | stats->TxWords += wlen; | |
f018b73a | 1709 | put_cpu(); |
85b4aa49 RL |
1710 | |
1711 | /* send down to lld */ | |
1875f27e | 1712 | fr_dev(fp) = lport; |
980f5156 | 1713 | fcoe_port_send(port, skb); |
85b4aa49 RL |
1714 | return 0; |
1715 | } | |
85b4aa49 | 1716 | |
e7a51997 | 1717 | /** |
1875f27e RL |
1718 | * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion |
1719 | * @skb: The completed skb (argument required by destructor) | |
e7a51997 JE |
1720 | */ |
1721 | static void fcoe_percpu_flush_done(struct sk_buff *skb) | |
1722 | { | |
1723 | complete(&fcoe_flush_completion); | |
1724 | } | |
1725 | ||
52ee8321 VD |
1726 | /** |
1727 | * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC | |
1728 | * @lport: The local port the frame was received on | |
1729 | * @fp: The received frame | |
1730 | * | |
1731 | * Return: 0 on passing filtering checks | |
1732 | */ | |
1733 | static inline int fcoe_filter_frames(struct fc_lport *lport, | |
1734 | struct fc_frame *fp) | |
1735 | { | |
619fe4be | 1736 | struct fcoe_ctlr *ctlr; |
52ee8321 VD |
1737 | struct fcoe_interface *fcoe; |
1738 | struct fc_frame_header *fh; | |
1739 | struct sk_buff *skb = (struct sk_buff *)fp; | |
1bd49b48 | 1740 | struct fc_stats *stats; |
52ee8321 VD |
1741 | |
1742 | /* | |
1743 | * We only check CRC if no offload is available and if it is | |
1744 | * it's solicited data, in which case, the FCP layer would | |
1745 | * check it during the copy. | |
1746 | */ | |
1747 | if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY) | |
1748 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; | |
1749 | else | |
1750 | fr_flags(fp) |= FCPHF_CRC_UNCHECKED; | |
1751 | ||
1752 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1753 | fh = fc_frame_header_get(fp); | |
1754 | if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP) | |
1755 | return 0; | |
1756 | ||
8597ae8b | 1757 | fcoe = ((struct fcoe_port *)lport_priv(lport))->priv; |
619fe4be RL |
1758 | ctlr = fcoe_to_ctlr(fcoe); |
1759 | if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO && | |
52ee8321 VD |
1760 | ntoh24(fh->fh_s_id) == FC_FID_FLOGI) { |
1761 | FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n"); | |
1762 | return -EINVAL; | |
1763 | } | |
1764 | ||
f2f96d20 | 1765 | if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) || |
52ee8321 VD |
1766 | le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) { |
1767 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; | |
1768 | return 0; | |
1769 | } | |
1770 | ||
1bd49b48 | 1771 | stats = per_cpu_ptr(lport->stats, get_cpu()); |
52ee8321 VD |
1772 | stats->InvalidCRCCount++; |
1773 | if (stats->InvalidCRCCount < 5) | |
1774 | printk(KERN_WARNING "fcoe: dropping frame with CRC error\n"); | |
7e1e7ead | 1775 | put_cpu(); |
52ee8321 VD |
1776 | return -EINVAL; |
1777 | } | |
1778 | ||
34f42a07 | 1779 | /** |
859b7b64 CL |
1780 | * fcoe_recv_frame() - process a single received frame |
1781 | * @skb: frame to process | |
85b4aa49 | 1782 | */ |
859b7b64 | 1783 | static void fcoe_recv_frame(struct sk_buff *skb) |
85b4aa49 | 1784 | { |
85b4aa49 | 1785 | u32 fr_len; |
1875f27e | 1786 | struct fc_lport *lport; |
85b4aa49 | 1787 | struct fcoe_rcv_info *fr; |
1bd49b48 | 1788 | struct fc_stats *stats; |
85b4aa49 RL |
1789 | struct fcoe_crc_eof crc_eof; |
1790 | struct fc_frame *fp; | |
014f5c3f | 1791 | struct fcoe_port *port; |
85b4aa49 RL |
1792 | struct fcoe_hdr *hp; |
1793 | ||
859b7b64 CL |
1794 | fr = fcoe_dev_from_skb(skb); |
1795 | lport = fr->fr_dev; | |
1796 | if (unlikely(!lport)) { | |
1797 | if (skb->destructor != fcoe_percpu_flush_done) | |
465b87bf | 1798 | FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n"); |
859b7b64 CL |
1799 | kfree_skb(skb); |
1800 | return; | |
1801 | } | |
1802 | ||
465b87bf BVA |
1803 | FCOE_NETDEV_DBG(skb->dev, |
1804 | "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n", | |
859b7b64 CL |
1805 | skb->len, skb->data_len, |
1806 | skb->head, skb->data, skb_tail_pointer(skb), | |
1807 | skb_end_pointer(skb), skb->csum, | |
1808 | skb->dev ? skb->dev->name : "<NULL>"); | |
1809 | ||
859b7b64 | 1810 | port = lport_priv(lport); |
f1633011 | 1811 | skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */ |
859b7b64 CL |
1812 | |
1813 | /* | |
1814 | * Frame length checks and setting up the header pointers | |
1815 | * was done in fcoe_rcv already. | |
1816 | */ | |
1817 | hp = (struct fcoe_hdr *) skb_network_header(skb); | |
859b7b64 | 1818 | |
1bd49b48 | 1819 | stats = per_cpu_ptr(lport->stats, get_cpu()); |
859b7b64 CL |
1820 | if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { |
1821 | if (stats->ErrorFrames < 5) | |
1822 | printk(KERN_WARNING "fcoe: FCoE version " | |
1823 | "mismatch: The frame has " | |
1824 | "version %x, but the " | |
1825 | "initiator supports version " | |
1826 | "%x\n", FC_FCOE_DECAPS_VER(hp), | |
1827 | FC_FCOE_VER); | |
f018b73a | 1828 | goto drop; |
859b7b64 CL |
1829 | } |
1830 | ||
1831 | skb_pull(skb, sizeof(struct fcoe_hdr)); | |
1832 | fr_len = skb->len - sizeof(struct fcoe_crc_eof); | |
1833 | ||
1834 | stats->RxFrames++; | |
1835 | stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; | |
1836 | ||
1837 | fp = (struct fc_frame *)skb; | |
1838 | fc_frame_init(fp); | |
1839 | fr_dev(fp) = lport; | |
1840 | fr_sof(fp) = hp->fcoe_sof; | |
1841 | ||
1842 | /* Copy out the CRC and EOF trailer for access */ | |
f018b73a JE |
1843 | if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) |
1844 | goto drop; | |
859b7b64 CL |
1845 | fr_eof(fp) = crc_eof.fcoe_eof; |
1846 | fr_crc(fp) = crc_eof.fcoe_crc32; | |
f018b73a JE |
1847 | if (pskb_trim(skb, fr_len)) |
1848 | goto drop; | |
859b7b64 | 1849 | |
52ee8321 VD |
1850 | if (!fcoe_filter_frames(lport, fp)) { |
1851 | put_cpu(); | |
1852 | fc_exch_recv(lport, fp); | |
1853 | return; | |
859b7b64 | 1854 | } |
f018b73a JE |
1855 | drop: |
1856 | stats->ErrorFrames++; | |
1857 | put_cpu(); | |
1858 | kfree_skb(skb); | |
859b7b64 CL |
1859 | } |
1860 | ||
1861 | /** | |
1862 | * fcoe_percpu_receive_thread() - The per-CPU packet receive thread | |
1863 | * @arg: The per-CPU context | |
1864 | * | |
1865 | * Return: 0 for success | |
1866 | */ | |
7c9c6841 | 1867 | static int fcoe_percpu_receive_thread(void *arg) |
859b7b64 CL |
1868 | { |
1869 | struct fcoe_percpu_s *p = arg; | |
1870 | struct sk_buff *skb; | |
20dc3811 NH |
1871 | struct sk_buff_head tmp; |
1872 | ||
1873 | skb_queue_head_init(&tmp); | |
859b7b64 | 1874 | |
4469c195 | 1875 | set_user_nice(current, -20); |
85b4aa49 | 1876 | |
95fdd5e9 | 1877 | retry: |
85b4aa49 RL |
1878 | while (!kthread_should_stop()) { |
1879 | ||
1880 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
20dc3811 | 1881 | skb_queue_splice_init(&p->fcoe_rx_list, &tmp); |
20dc3811 | 1882 | |
95fdd5e9 | 1883 | if (!skb_queue_len(&tmp)) { |
85b4aa49 RL |
1884 | set_current_state(TASK_INTERRUPTIBLE); |
1885 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1886 | schedule(); | |
1887 | set_current_state(TASK_RUNNING); | |
95fdd5e9 NH |
1888 | goto retry; |
1889 | } | |
1890 | ||
1891 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1892 | ||
1893 | while ((skb = __skb_dequeue(&tmp)) != NULL) | |
1894 | fcoe_recv_frame(skb); | |
1895 | ||
85b4aa49 RL |
1896 | } |
1897 | return 0; | |
1898 | } | |
1899 | ||
85b4aa49 | 1900 | /** |
1875f27e | 1901 | * fcoe_dev_setup() - Setup the link change notification interface |
34f42a07 | 1902 | */ |
b0d428ad | 1903 | static void fcoe_dev_setup(void) |
85b4aa49 | 1904 | { |
6f6c2aa3 | 1905 | register_dcbevent_notifier(&dcb_notifier); |
85b4aa49 RL |
1906 | register_netdevice_notifier(&fcoe_notifier); |
1907 | } | |
1908 | ||
1909 | /** | |
1875f27e | 1910 | * fcoe_dev_cleanup() - Cleanup the link change notification interface |
34f42a07 | 1911 | */ |
85b4aa49 RL |
1912 | static void fcoe_dev_cleanup(void) |
1913 | { | |
6f6c2aa3 | 1914 | unregister_dcbevent_notifier(&dcb_notifier); |
85b4aa49 RL |
1915 | unregister_netdevice_notifier(&fcoe_notifier); |
1916 | } | |
1917 | ||
6f6c2aa3 | 1918 | static struct fcoe_interface * |
1919 | fcoe_hostlist_lookup_realdev_port(struct net_device *netdev) | |
1920 | { | |
1921 | struct fcoe_interface *fcoe; | |
1922 | struct net_device *real_dev; | |
1923 | ||
1924 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { | |
1925 | if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) | |
1926 | real_dev = vlan_dev_real_dev(fcoe->netdev); | |
1927 | else | |
1928 | real_dev = fcoe->netdev; | |
1929 | ||
1930 | if (netdev == real_dev) | |
1931 | return fcoe; | |
1932 | } | |
1933 | return NULL; | |
1934 | } | |
1935 | ||
1936 | static int fcoe_dcb_app_notification(struct notifier_block *notifier, | |
1937 | ulong event, void *ptr) | |
1938 | { | |
1939 | struct dcb_app_type *entry = ptr; | |
619fe4be | 1940 | struct fcoe_ctlr *ctlr; |
6f6c2aa3 | 1941 | struct fcoe_interface *fcoe; |
1942 | struct net_device *netdev; | |
6f6c2aa3 | 1943 | int prio; |
1944 | ||
1945 | if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE) | |
1946 | return NOTIFY_OK; | |
1947 | ||
1948 | netdev = dev_get_by_index(&init_net, entry->ifindex); | |
1949 | if (!netdev) | |
1950 | return NOTIFY_OK; | |
1951 | ||
1952 | fcoe = fcoe_hostlist_lookup_realdev_port(netdev); | |
1953 | dev_put(netdev); | |
1954 | if (!fcoe) | |
1955 | return NOTIFY_OK; | |
1956 | ||
619fe4be RL |
1957 | ctlr = fcoe_to_ctlr(fcoe); |
1958 | ||
6f6c2aa3 | 1959 | if (entry->dcbx & DCB_CAP_DCBX_VER_CEE) |
1960 | prio = ffs(entry->app.priority) - 1; | |
1961 | else | |
1962 | prio = entry->app.priority; | |
1963 | ||
1964 | if (prio < 0) | |
1965 | return NOTIFY_OK; | |
1966 | ||
1967 | if (entry->app.protocol == ETH_P_FIP || | |
1968 | entry->app.protocol == ETH_P_FCOE) | |
619fe4be | 1969 | ctlr->priority = prio; |
6f6c2aa3 | 1970 | |
31c37a6f NP |
1971 | if (entry->app.protocol == ETH_P_FCOE) |
1972 | fcoe->priority = prio; | |
6f6c2aa3 | 1973 | |
1974 | return NOTIFY_OK; | |
1975 | } | |
1976 | ||
85b4aa49 | 1977 | /** |
1875f27e RL |
1978 | * fcoe_device_notification() - Handler for net device events |
1979 | * @notifier: The context of the notification | |
1980 | * @event: The type of event | |
1981 | * @ptr: The net device that the event was on | |
85b4aa49 | 1982 | * |
1875f27e | 1983 | * This function is called by the Ethernet driver in case of link change event. |
85b4aa49 RL |
1984 | * |
1985 | * Returns: 0 for success | |
34f42a07 | 1986 | */ |
85b4aa49 RL |
1987 | static int fcoe_device_notification(struct notifier_block *notifier, |
1988 | ulong event, void *ptr) | |
1989 | { | |
435c8667 | 1990 | struct fcoe_ctlr_device *cdev; |
1875f27e | 1991 | struct fc_lport *lport = NULL; |
351638e7 | 1992 | struct net_device *netdev = netdev_notifier_info_to_dev(ptr); |
619fe4be | 1993 | struct fcoe_ctlr *ctlr; |
014f5c3f | 1994 | struct fcoe_interface *fcoe; |
2e70e241 | 1995 | struct fcoe_port *port; |
1bd49b48 | 1996 | struct fc_stats *stats; |
97c8389d | 1997 | u32 link_possible = 1; |
85b4aa49 RL |
1998 | u32 mfs; |
1999 | int rc = NOTIFY_OK; | |
2000 | ||
014f5c3f | 2001 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
25024989 | 2002 | if (fcoe->netdev == netdev) { |
619fe4be RL |
2003 | ctlr = fcoe_to_ctlr(fcoe); |
2004 | lport = ctlr->lp; | |
85b4aa49 RL |
2005 | break; |
2006 | } | |
2007 | } | |
1875f27e | 2008 | if (!lport) { |
85b4aa49 RL |
2009 | rc = NOTIFY_DONE; |
2010 | goto out; | |
2011 | } | |
2012 | ||
85b4aa49 RL |
2013 | switch (event) { |
2014 | case NETDEV_DOWN: | |
2015 | case NETDEV_GOING_DOWN: | |
97c8389d | 2016 | link_possible = 0; |
85b4aa49 RL |
2017 | break; |
2018 | case NETDEV_UP: | |
2019 | case NETDEV_CHANGE: | |
85b4aa49 RL |
2020 | break; |
2021 | case NETDEV_CHANGEMTU: | |
7221d7e5 YZ |
2022 | if (netdev->features & NETIF_F_FCOE_MTU) |
2023 | break; | |
1d1b88dc VD |
2024 | mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + |
2025 | sizeof(struct fcoe_crc_eof)); | |
85b4aa49 | 2026 | if (mfs >= FC_MIN_MAX_FRAME) |
1875f27e | 2027 | fc_set_mfs(lport, mfs); |
85b4aa49 RL |
2028 | break; |
2029 | case NETDEV_REGISTER: | |
2030 | break; | |
2e70e241 CL |
2031 | case NETDEV_UNREGISTER: |
2032 | list_del(&fcoe->list); | |
619fe4be | 2033 | port = lport_priv(ctlr->lp); |
2ca32b48 | 2034 | queue_work(fcoe_wq, &port->destroy_work); |
2e70e241 CL |
2035 | goto out; |
2036 | break; | |
54a5b21d YZ |
2037 | case NETDEV_FEAT_CHANGE: |
2038 | fcoe_netdev_features_change(lport, netdev); | |
2039 | break; | |
85b4aa49 | 2040 | default: |
1d1b88dc | 2041 | FCOE_NETDEV_DBG(netdev, "Unknown event %ld " |
d5488eb9 | 2042 | "from netdev netlink\n", event); |
85b4aa49 | 2043 | } |
5e4f8fe7 RL |
2044 | |
2045 | fcoe_link_speed_update(lport); | |
2046 | ||
435c8667 RL |
2047 | cdev = fcoe_ctlr_to_ctlr_dev(ctlr); |
2048 | ||
2049 | if (link_possible && !fcoe_link_ok(lport)) { | |
2050 | switch (cdev->enabled) { | |
2051 | case FCOE_CTLR_DISABLED: | |
2052 | pr_info("Link up while interface is disabled.\n"); | |
2053 | break; | |
2054 | case FCOE_CTLR_ENABLED: | |
2055 | case FCOE_CTLR_UNUSED: | |
2056 | fcoe_ctlr_link_up(ctlr); | |
2057 | }; | |
2058 | } else if (fcoe_ctlr_link_down(ctlr)) { | |
2059 | switch (cdev->enabled) { | |
2060 | case FCOE_CTLR_DISABLED: | |
2061 | pr_info("Link down while interface is disabled.\n"); | |
2062 | break; | |
2063 | case FCOE_CTLR_ENABLED: | |
2064 | case FCOE_CTLR_UNUSED: | |
2065 | stats = per_cpu_ptr(lport->stats, get_cpu()); | |
2066 | stats->LinkFailureCount++; | |
2067 | put_cpu(); | |
2068 | fcoe_clean_pending_queue(lport); | |
2069 | }; | |
85b4aa49 RL |
2070 | } |
2071 | out: | |
2072 | return rc; | |
2073 | } | |
2074 | ||
55a66d3c VD |
2075 | /** |
2076 | * fcoe_disable() - Disables a FCoE interface | |
78a58246 | 2077 | * @netdev : The net_device object the Ethernet interface to create on |
55a66d3c | 2078 | * |
78a58246 | 2079 | * Called from fcoe transport. |
55a66d3c VD |
2080 | * |
2081 | * Returns: 0 for success | |
435c8667 RL |
2082 | * |
2083 | * Deprecated: use fcoe_ctlr_enabled() | |
55a66d3c | 2084 | */ |
78a58246 | 2085 | static int fcoe_disable(struct net_device *netdev) |
55a66d3c | 2086 | { |
619fe4be | 2087 | struct fcoe_ctlr *ctlr; |
55a66d3c | 2088 | struct fcoe_interface *fcoe; |
55a66d3c VD |
2089 | int rc = 0; |
2090 | ||
2091 | mutex_lock(&fcoe_config_mutex); | |
55a66d3c | 2092 | |
ee5df628 | 2093 | rtnl_lock(); |
55a66d3c VD |
2094 | fcoe = fcoe_hostlist_lookup_port(netdev); |
2095 | rtnl_unlock(); | |
2096 | ||
9ee50e48 | 2097 | if (fcoe) { |
619fe4be RL |
2098 | ctlr = fcoe_to_ctlr(fcoe); |
2099 | fcoe_ctlr_link_down(ctlr); | |
2100 | fcoe_clean_pending_queue(ctlr->lp); | |
9ee50e48 | 2101 | } else |
55a66d3c VD |
2102 | rc = -ENODEV; |
2103 | ||
55a66d3c VD |
2104 | mutex_unlock(&fcoe_config_mutex); |
2105 | return rc; | |
2106 | } | |
2107 | ||
2108 | /** | |
2109 | * fcoe_enable() - Enables a FCoE interface | |
78a58246 | 2110 | * @netdev : The net_device object the Ethernet interface to create on |
55a66d3c | 2111 | * |
78a58246 | 2112 | * Called from fcoe transport. |
55a66d3c VD |
2113 | * |
2114 | * Returns: 0 for success | |
2115 | */ | |
78a58246 | 2116 | static int fcoe_enable(struct net_device *netdev) |
55a66d3c | 2117 | { |
619fe4be | 2118 | struct fcoe_ctlr *ctlr; |
55a66d3c | 2119 | struct fcoe_interface *fcoe; |
55a66d3c VD |
2120 | int rc = 0; |
2121 | ||
2122 | mutex_lock(&fcoe_config_mutex); | |
ee5df628 | 2123 | rtnl_lock(); |
55a66d3c VD |
2124 | fcoe = fcoe_hostlist_lookup_port(netdev); |
2125 | rtnl_unlock(); | |
2126 | ||
619fe4be | 2127 | if (!fcoe) { |
55a66d3c | 2128 | rc = -ENODEV; |
619fe4be RL |
2129 | goto out; |
2130 | } | |
55a66d3c | 2131 | |
619fe4be RL |
2132 | ctlr = fcoe_to_ctlr(fcoe); |
2133 | ||
2134 | if (!fcoe_link_ok(ctlr->lp)) | |
2135 | fcoe_ctlr_link_up(ctlr); | |
2136 | ||
2137 | out: | |
55a66d3c VD |
2138 | mutex_unlock(&fcoe_config_mutex); |
2139 | return rc; | |
2140 | } | |
2141 | ||
435c8667 RL |
2142 | /** |
2143 | * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller | |
2144 | * @cdev: The FCoE Controller that is being enabled or disabled | |
2145 | * | |
2146 | * fcoe_sysfs will ensure that the state of 'enabled' has | |
2147 | * changed, so no checking is necessary here. This routine simply | |
2148 | * calls fcoe_enable or fcoe_disable, both of which are deprecated. | |
2149 | * When those routines are removed the functionality can be merged | |
2150 | * here. | |
2151 | */ | |
2152 | static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev) | |
2153 | { | |
2154 | struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev); | |
2155 | struct fc_lport *lport = ctlr->lp; | |
2156 | struct net_device *netdev = fcoe_netdev(lport); | |
2157 | ||
2158 | switch (cdev->enabled) { | |
2159 | case FCOE_CTLR_ENABLED: | |
2160 | return fcoe_enable(netdev); | |
2161 | case FCOE_CTLR_DISABLED: | |
2162 | return fcoe_disable(netdev); | |
2163 | case FCOE_CTLR_UNUSED: | |
2164 | default: | |
2165 | return -ENOTSUPP; | |
2166 | }; | |
2167 | } | |
2168 | ||
85b4aa49 | 2169 | /** |
1875f27e | 2170 | * fcoe_destroy() - Destroy a FCoE interface |
78a58246 | 2171 | * @netdev : The net_device object the Ethernet interface to create on |
1875f27e | 2172 | * |
78a58246 | 2173 | * Called from fcoe transport |
85b4aa49 RL |
2174 | * |
2175 | * Returns: 0 for success | |
34f42a07 | 2176 | */ |
78a58246 | 2177 | static int fcoe_destroy(struct net_device *netdev) |
85b4aa49 | 2178 | { |
619fe4be | 2179 | struct fcoe_ctlr *ctlr; |
030f4e00 | 2180 | struct fcoe_interface *fcoe; |
f04ca1b6 | 2181 | struct fc_lport *lport; |
b2085a4e | 2182 | struct fcoe_port *port; |
8eca355f | 2183 | int rc = 0; |
85b4aa49 | 2184 | |
dfc1d0fe | 2185 | mutex_lock(&fcoe_config_mutex); |
ee5df628 | 2186 | rtnl_lock(); |
2e70e241 CL |
2187 | fcoe = fcoe_hostlist_lookup_port(netdev); |
2188 | if (!fcoe) { | |
85b4aa49 | 2189 | rc = -ENODEV; |
78a58246 | 2190 | goto out_nodev; |
85b4aa49 | 2191 | } |
619fe4be RL |
2192 | ctlr = fcoe_to_ctlr(fcoe); |
2193 | lport = ctlr->lp; | |
b2085a4e | 2194 | port = lport_priv(lport); |
54a5b21d | 2195 | list_del(&fcoe->list); |
b2085a4e | 2196 | queue_work(fcoe_wq, &port->destroy_work); |
85b4aa49 | 2197 | out_nodev: |
b2085a4e | 2198 | rtnl_unlock(); |
dfc1d0fe | 2199 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 RL |
2200 | return rc; |
2201 | } | |
2202 | ||
1875f27e RL |
2203 | /** |
2204 | * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context | |
2205 | * @work: Handle to the FCoE port to be destroyed | |
2206 | */ | |
2e70e241 CL |
2207 | static void fcoe_destroy_work(struct work_struct *work) |
2208 | { | |
f9c4358e RL |
2209 | struct fcoe_ctlr_device *cdev; |
2210 | struct fcoe_ctlr *ctlr; | |
2e70e241 | 2211 | struct fcoe_port *port; |
b2085a4e | 2212 | struct fcoe_interface *fcoe; |
94aa743a NP |
2213 | struct Scsi_Host *shost; |
2214 | struct fc_host_attrs *fc_host; | |
2215 | unsigned long flags; | |
2216 | struct fc_vport *vport; | |
2217 | struct fc_vport *next_vport; | |
2e70e241 CL |
2218 | |
2219 | port = container_of(work, struct fcoe_port, destroy_work); | |
94aa743a NP |
2220 | shost = port->lport->host; |
2221 | fc_host = shost_to_fc_host(shost); | |
2222 | ||
2223 | /* Loop through all the vports and mark them for deletion */ | |
2224 | spin_lock_irqsave(shost->host_lock, flags); | |
2225 | list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) { | |
2226 | if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { | |
2227 | continue; | |
2228 | } else { | |
2229 | vport->flags |= FC_VPORT_DELETING; | |
2230 | queue_work(fc_host_work_q(shost), | |
2231 | &vport->vport_delete_work); | |
2232 | } | |
2233 | } | |
2234 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2235 | ||
2236 | flush_workqueue(fc_host_work_q(shost)); | |
2237 | ||
2e70e241 | 2238 | mutex_lock(&fcoe_config_mutex); |
b2085a4e | 2239 | |
b2085a4e | 2240 | fcoe = port->priv; |
f9c4358e RL |
2241 | ctlr = fcoe_to_ctlr(fcoe); |
2242 | cdev = fcoe_ctlr_to_ctlr_dev(ctlr); | |
2243 | ||
2e70e241 | 2244 | fcoe_if_destroy(port->lport); |
ccefd23e | 2245 | fcoe_interface_cleanup(fcoe); |
b2085a4e | 2246 | |
2e70e241 | 2247 | mutex_unlock(&fcoe_config_mutex); |
f9c4358e RL |
2248 | |
2249 | fcoe_ctlr_device_delete(cdev); | |
2e70e241 CL |
2250 | } |
2251 | ||
78a58246 YZ |
2252 | /** |
2253 | * fcoe_match() - Check if the FCoE is supported on the given netdevice | |
2254 | * @netdev : The net_device object the Ethernet interface to create on | |
2255 | * | |
2256 | * Called from fcoe transport. | |
2257 | * | |
2258 | * Returns: always returns true as this is the default FCoE transport, | |
2259 | * i.e., support all netdevs. | |
2260 | */ | |
2261 | static bool fcoe_match(struct net_device *netdev) | |
2262 | { | |
2263 | return true; | |
2264 | } | |
2265 | ||
6f6c2aa3 | 2266 | /** |
2267 | * fcoe_dcb_create() - Initialize DCB attributes and hooks | |
2268 | * @netdev: The net_device object of the L2 link that should be queried | |
2269 | * @port: The fcoe_port to bind FCoE APP priority with | |
2270 | * @ | |
2271 | */ | |
2272 | static void fcoe_dcb_create(struct fcoe_interface *fcoe) | |
2273 | { | |
2274 | #ifdef CONFIG_DCB | |
2275 | int dcbx; | |
2276 | u8 fup, up; | |
2277 | struct net_device *netdev = fcoe->realdev; | |
619fe4be | 2278 | struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); |
6f6c2aa3 | 2279 | struct dcb_app app = { |
2280 | .priority = 0, | |
2281 | .protocol = ETH_P_FCOE | |
2282 | }; | |
2283 | ||
2284 | /* setup DCB priority attributes. */ | |
2285 | if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) { | |
2286 | dcbx = netdev->dcbnl_ops->getdcbx(netdev); | |
2287 | ||
2288 | if (dcbx & DCB_CAP_DCBX_VER_IEEE) { | |
2289 | app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE; | |
2290 | up = dcb_ieee_getapp_mask(netdev, &app); | |
2291 | app.protocol = ETH_P_FIP; | |
2292 | fup = dcb_ieee_getapp_mask(netdev, &app); | |
2293 | } else { | |
2294 | app.selector = DCB_APP_IDTYPE_ETHTYPE; | |
2295 | up = dcb_getapp(netdev, &app); | |
2296 | app.protocol = ETH_P_FIP; | |
2297 | fup = dcb_getapp(netdev, &app); | |
2298 | } | |
2299 | ||
31c37a6f NP |
2300 | fcoe->priority = ffs(up) ? ffs(up) - 1 : 0; |
2301 | ctlr->priority = ffs(fup) ? ffs(fup) - 1 : fcoe->priority; | |
6f6c2aa3 | 2302 | } |
2303 | #endif | |
2304 | } | |
2305 | ||
435c8667 RL |
2306 | enum fcoe_create_link_state { |
2307 | FCOE_CREATE_LINK_DOWN, | |
2308 | FCOE_CREATE_LINK_UP, | |
2309 | }; | |
2310 | ||
85b4aa49 | 2311 | /** |
435c8667 RL |
2312 | * _fcoe_create() - (internal) Create a fcoe interface |
2313 | * @netdev : The net_device object the Ethernet interface to create on | |
2314 | * @fip_mode: The FIP mode for this creation | |
2315 | * @link_state: The ctlr link state on creation | |
1875f27e | 2316 | * |
435c8667 RL |
2317 | * Called from either the libfcoe 'create' module parameter |
2318 | * via fcoe_create or from fcoe_syfs's ctlr_create file. | |
85b4aa49 | 2319 | * |
435c8667 RL |
2320 | * libfcoe's 'create' module parameter is deprecated so some |
2321 | * consolidation of code can be done when that interface is | |
2322 | * removed. | |
34f42a07 | 2323 | */ |
435c8667 RL |
2324 | static int _fcoe_create(struct net_device *netdev, enum fip_state fip_mode, |
2325 | enum fcoe_create_link_state link_state) | |
85b4aa49 | 2326 | { |
b2085a4e | 2327 | int rc = 0; |
8d55e507 | 2328 | struct fcoe_ctlr_device *ctlr_dev; |
619fe4be | 2329 | struct fcoe_ctlr *ctlr; |
030f4e00 | 2330 | struct fcoe_interface *fcoe; |
af7f85d9 | 2331 | struct fc_lport *lport; |
85b4aa49 | 2332 | |
dfc1d0fe | 2333 | mutex_lock(&fcoe_config_mutex); |
ee5df628 | 2334 | rtnl_lock(); |
34ce27bc | 2335 | |
85b4aa49 RL |
2336 | /* look for existing lport */ |
2337 | if (fcoe_hostlist_lookup(netdev)) { | |
2338 | rc = -EEXIST; | |
78a58246 | 2339 | goto out_nodev; |
85b4aa49 | 2340 | } |
85b4aa49 | 2341 | |
1dd454d9 | 2342 | fcoe = fcoe_interface_create(netdev, fip_mode); |
7287fb91 RL |
2343 | if (IS_ERR(fcoe)) { |
2344 | rc = PTR_ERR(fcoe); | |
78a58246 | 2345 | goto out_nodev; |
030f4e00 CL |
2346 | } |
2347 | ||
619fe4be | 2348 | ctlr = fcoe_to_ctlr(fcoe); |
8d55e507 RL |
2349 | ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr); |
2350 | lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0); | |
af7f85d9 | 2351 | if (IS_ERR(lport)) { |
d5488eb9 | 2352 | printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", |
85b4aa49 | 2353 | netdev->name); |
85b4aa49 | 2354 | rc = -EIO; |
848e7d5b | 2355 | rtnl_unlock(); |
2e70e241 | 2356 | fcoe_interface_cleanup(fcoe); |
f9c4358e RL |
2357 | mutex_unlock(&fcoe_config_mutex); |
2358 | fcoe_ctlr_device_delete(ctlr_dev); | |
2359 | goto out; | |
85b4aa49 | 2360 | } |
030f4e00 | 2361 | |
54b649f8 | 2362 | /* Make this the "master" N_Port */ |
619fe4be | 2363 | ctlr->lp = lport; |
54b649f8 | 2364 | |
6f6c2aa3 | 2365 | /* setup DCB priority attributes. */ |
2366 | fcoe_dcb_create(fcoe); | |
2367 | ||
54b649f8 CL |
2368 | /* start FIP Discovery and FLOGI */ |
2369 | lport->boot_time = jiffies; | |
2370 | fc_fabric_login(lport); | |
435c8667 RL |
2371 | |
2372 | /* | |
2373 | * If the fcoe_ctlr_device is to be set to DISABLED | |
2374 | * it must be done after the lport is added to the | |
2375 | * hostlist, but before the rtnl_lock is released. | |
2376 | * This is because the rtnl_lock protects the | |
2377 | * hostlist that fcoe_device_notification uses. If | |
2378 | * the FCoE Controller is intended to be created | |
2379 | * DISABLED then 'enabled' needs to be considered | |
2380 | * handling link events. 'enabled' must be set | |
2381 | * before the lport can be found in the hostlist | |
2382 | * when a link up event is received. | |
2383 | */ | |
2384 | if (link_state == FCOE_CREATE_LINK_UP) | |
2385 | ctlr_dev->enabled = FCOE_CTLR_ENABLED; | |
2386 | else | |
2387 | ctlr_dev->enabled = FCOE_CTLR_DISABLED; | |
2388 | ||
2389 | if (link_state == FCOE_CREATE_LINK_UP && | |
2390 | !fcoe_link_ok(lport)) { | |
22805123 | 2391 | rtnl_unlock(); |
619fe4be | 2392 | fcoe_ctlr_link_up(ctlr); |
22805123 RL |
2393 | mutex_unlock(&fcoe_config_mutex); |
2394 | return rc; | |
2395 | } | |
030f4e00 | 2396 | |
85b4aa49 | 2397 | out_nodev: |
34ce27bc | 2398 | rtnl_unlock(); |
dfc1d0fe | 2399 | mutex_unlock(&fcoe_config_mutex); |
f9c4358e | 2400 | out: |
85b4aa49 RL |
2401 | return rc; |
2402 | } | |
2403 | ||
435c8667 RL |
2404 | /** |
2405 | * fcoe_create() - Create a fcoe interface | |
2406 | * @netdev : The net_device object the Ethernet interface to create on | |
2407 | * @fip_mode: The FIP mode for this creation | |
2408 | * | |
2409 | * Called from fcoe transport | |
2410 | * | |
2411 | * Returns: 0 for success | |
2412 | */ | |
2413 | static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode) | |
2414 | { | |
2415 | return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP); | |
2416 | } | |
2417 | ||
2418 | /** | |
2419 | * fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs | |
2420 | * @netdev: The net_device to be used by the allocated FCoE Controller | |
2421 | * | |
2422 | * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr | |
2423 | * in a link_down state. The allows the user an opportunity to configure | |
2424 | * the FCoE Controller from sysfs before enabling the FCoE Controller. | |
2425 | * | |
2426 | * Creating in with this routine starts the FCoE Controller in Fabric | |
2427 | * mode. The user can change to VN2VN or another mode before enabling. | |
2428 | */ | |
2429 | static int fcoe_ctlr_alloc(struct net_device *netdev) | |
2430 | { | |
2431 | return _fcoe_create(netdev, FIP_MODE_FABRIC, | |
2432 | FCOE_CREATE_LINK_DOWN); | |
2433 | } | |
2434 | ||
5e4f8fe7 RL |
2435 | /** |
2436 | * fcoe_link_ok() - Check if the link is OK for a local port | |
2437 | * @lport: The local port to check link on | |
2438 | * | |
2439 | * Returns: 0 if link is UP and OK, -1 if not | |
2440 | * | |
2441 | */ | |
7c9c6841 | 2442 | static int fcoe_link_ok(struct fc_lport *lport) |
5e4f8fe7 | 2443 | { |
8597ae8b | 2444 | struct net_device *netdev = fcoe_netdev(lport); |
5e4f8fe7 RL |
2445 | |
2446 | if (netif_oper_up(netdev)) | |
2447 | return 0; | |
2448 | return -1; | |
2449 | } | |
2450 | ||
34f42a07 | 2451 | /** |
1875f27e RL |
2452 | * fcoe_percpu_clean() - Clear all pending skbs for an local port |
2453 | * @lport: The local port whose skbs are to be cleared | |
e7a51997 JE |
2454 | * |
2455 | * Must be called with fcoe_create_mutex held to single-thread completion. | |
2456 | * | |
2457 | * This flushes the pending skbs by adding a new skb to each queue and | |
2458 | * waiting until they are all freed. This assures us that not only are | |
2459 | * there no packets that will be handled by the lport, but also that any | |
2460 | * threads already handling packet have returned. | |
85b4aa49 | 2461 | */ |
7c9c6841 | 2462 | static void fcoe_percpu_clean(struct fc_lport *lport) |
85b4aa49 | 2463 | { |
85b4aa49 | 2464 | struct fcoe_percpu_s *pp; |
dd060e74 | 2465 | struct sk_buff *skb; |
5e5e92df | 2466 | unsigned int cpu; |
85b4aa49 | 2467 | |
5e5e92df RL |
2468 | for_each_possible_cpu(cpu) { |
2469 | pp = &per_cpu(fcoe_percpu, cpu); | |
e7a51997 | 2470 | |
dd060e74 | 2471 | if (!pp->thread || !cpu_online(cpu)) |
e7a51997 | 2472 | continue; |
e7a51997 JE |
2473 | |
2474 | skb = dev_alloc_skb(0); | |
b3b8abd8 | 2475 | if (!skb) |
e7a51997 | 2476 | continue; |
b3b8abd8 | 2477 | |
e7a51997 JE |
2478 | skb->destructor = fcoe_percpu_flush_done; |
2479 | ||
dd060e74 | 2480 | spin_lock_bh(&pp->fcoe_rx_list.lock); |
e7a51997 JE |
2481 | __skb_queue_tail(&pp->fcoe_rx_list, skb); |
2482 | if (pp->fcoe_rx_list.qlen == 1) | |
2483 | wake_up_process(pp->thread); | |
5e5e92df | 2484 | spin_unlock_bh(&pp->fcoe_rx_list.lock); |
e7a51997 JE |
2485 | |
2486 | wait_for_completion(&fcoe_flush_completion); | |
85b4aa49 RL |
2487 | } |
2488 | } | |
85b4aa49 | 2489 | |
34f42a07 | 2490 | /** |
1875f27e RL |
2491 | * fcoe_reset() - Reset a local port |
2492 | * @shost: The SCSI host associated with the local port to be reset | |
85b4aa49 | 2493 | * |
1875f27e | 2494 | * Returns: Always 0 (return value required by FC transport template) |
85b4aa49 | 2495 | */ |
7c9c6841 | 2496 | static int fcoe_reset(struct Scsi_Host *shost) |
85b4aa49 RL |
2497 | { |
2498 | struct fc_lport *lport = shost_priv(shost); | |
d2f80952 VD |
2499 | struct fcoe_port *port = lport_priv(lport); |
2500 | struct fcoe_interface *fcoe = port->priv; | |
619fe4be | 2501 | struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); |
435c8667 | 2502 | struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr); |
d2f80952 | 2503 | |
619fe4be RL |
2504 | fcoe_ctlr_link_down(ctlr); |
2505 | fcoe_clean_pending_queue(ctlr->lp); | |
435c8667 RL |
2506 | |
2507 | if (cdev->enabled != FCOE_CTLR_DISABLED && | |
2508 | !fcoe_link_ok(ctlr->lp)) | |
619fe4be | 2509 | fcoe_ctlr_link_up(ctlr); |
85b4aa49 RL |
2510 | return 0; |
2511 | } | |
85b4aa49 | 2512 | |
34f42a07 | 2513 | /** |
1875f27e RL |
2514 | * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device |
2515 | * @netdev: The net device used as a key | |
85b4aa49 | 2516 | * |
1875f27e RL |
2517 | * Locking: Must be called with the RNL mutex held. |
2518 | * | |
2519 | * Returns: NULL or the FCoE interface | |
85b4aa49 | 2520 | */ |
014f5c3f | 2521 | static struct fcoe_interface * |
1875f27e | 2522 | fcoe_hostlist_lookup_port(const struct net_device *netdev) |
85b4aa49 | 2523 | { |
014f5c3f | 2524 | struct fcoe_interface *fcoe; |
85b4aa49 | 2525 | |
014f5c3f | 2526 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
1875f27e | 2527 | if (fcoe->netdev == netdev) |
014f5c3f | 2528 | return fcoe; |
85b4aa49 | 2529 | } |
85b4aa49 RL |
2530 | return NULL; |
2531 | } | |
2532 | ||
34f42a07 | 2533 | /** |
1875f27e RL |
2534 | * fcoe_hostlist_lookup() - Find the local port associated with a |
2535 | * given net device | |
2536 | * @netdev: The netdevice used as a key | |
85b4aa49 | 2537 | * |
1875f27e RL |
2538 | * Locking: Must be called with the RTNL mutex held |
2539 | * | |
2540 | * Returns: NULL or the local port | |
85b4aa49 | 2541 | */ |
090eb6c4 | 2542 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) |
85b4aa49 | 2543 | { |
619fe4be | 2544 | struct fcoe_ctlr *ctlr; |
014f5c3f | 2545 | struct fcoe_interface *fcoe; |
85b4aa49 | 2546 | |
014f5c3f | 2547 | fcoe = fcoe_hostlist_lookup_port(netdev); |
619fe4be RL |
2548 | ctlr = fcoe_to_ctlr(fcoe); |
2549 | return (fcoe) ? ctlr->lp : NULL; | |
85b4aa49 | 2550 | } |
85b4aa49 | 2551 | |
34f42a07 | 2552 | /** |
1875f27e RL |
2553 | * fcoe_hostlist_add() - Add the FCoE interface identified by a local |
2554 | * port to the hostlist | |
2555 | * @lport: The local port that identifies the FCoE interface to be added | |
85b4aa49 | 2556 | * |
090eb6c4 | 2557 | * Locking: must be called with the RTNL mutex held |
1875f27e RL |
2558 | * |
2559 | * Returns: 0 for success | |
85b4aa49 | 2560 | */ |
090eb6c4 | 2561 | static int fcoe_hostlist_add(const struct fc_lport *lport) |
85b4aa49 | 2562 | { |
014f5c3f CL |
2563 | struct fcoe_interface *fcoe; |
2564 | struct fcoe_port *port; | |
2565 | ||
2566 | fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); | |
2567 | if (!fcoe) { | |
2568 | port = lport_priv(lport); | |
8597ae8b | 2569 | fcoe = port->priv; |
014f5c3f | 2570 | list_add_tail(&fcoe->list, &fcoe_hostlist); |
85b4aa49 RL |
2571 | } |
2572 | return 0; | |
2573 | } | |
85b4aa49 | 2574 | |
f9184df3 NH |
2575 | /** |
2576 | * fcoe_hostlist_del() - Remove the FCoE interface identified by a local | |
2577 | * port to the hostlist | |
2578 | * @lport: The local port that identifies the FCoE interface to be added | |
2579 | * | |
2580 | * Locking: must be called with the RTNL mutex held | |
2581 | * | |
2582 | */ | |
2583 | static void fcoe_hostlist_del(const struct fc_lport *lport) | |
2584 | { | |
2585 | struct fcoe_interface *fcoe; | |
2586 | struct fcoe_port *port; | |
2587 | ||
2588 | port = lport_priv(lport); | |
2589 | fcoe = port->priv; | |
2590 | list_del(&fcoe->list); | |
2591 | return; | |
2592 | } | |
78a58246 YZ |
2593 | |
2594 | static struct fcoe_transport fcoe_sw_transport = { | |
2595 | .name = {FCOE_TRANSPORT_DEFAULT}, | |
2596 | .attached = false, | |
2597 | .list = LIST_HEAD_INIT(fcoe_sw_transport.list), | |
2598 | .match = fcoe_match, | |
435c8667 | 2599 | .alloc = fcoe_ctlr_alloc, |
78a58246 YZ |
2600 | .create = fcoe_create, |
2601 | .destroy = fcoe_destroy, | |
2602 | .enable = fcoe_enable, | |
2603 | .disable = fcoe_disable, | |
2604 | }; | |
2605 | ||
85b4aa49 | 2606 | /** |
1875f27e | 2607 | * fcoe_init() - Initialize fcoe.ko |
85b4aa49 | 2608 | * |
1875f27e | 2609 | * Returns: 0 on success, or a negative value on failure |
34f42a07 | 2610 | */ |
85b4aa49 RL |
2611 | static int __init fcoe_init(void) |
2612 | { | |
1875f27e | 2613 | struct fcoe_percpu_s *p; |
38eccabd | 2614 | unsigned int cpu; |
8976f424 | 2615 | int rc = 0; |
85b4aa49 | 2616 | |
2ca32b48 TH |
2617 | fcoe_wq = alloc_workqueue("fcoe", 0, 0); |
2618 | if (!fcoe_wq) | |
2619 | return -ENOMEM; | |
2620 | ||
78a58246 YZ |
2621 | /* register as a fcoe transport */ |
2622 | rc = fcoe_transport_attach(&fcoe_sw_transport); | |
2623 | if (rc) { | |
2624 | printk(KERN_ERR "failed to register an fcoe transport, check " | |
2625 | "if libfcoe is loaded\n"); | |
2626 | return rc; | |
2627 | } | |
2628 | ||
dfc1d0fe CL |
2629 | mutex_lock(&fcoe_config_mutex); |
2630 | ||
38eccabd | 2631 | for_each_possible_cpu(cpu) { |
5e5e92df | 2632 | p = &per_cpu(fcoe_percpu, cpu); |
38eccabd RL |
2633 | skb_queue_head_init(&p->fcoe_rx_list); |
2634 | } | |
2635 | ||
8976f424 RL |
2636 | for_each_online_cpu(cpu) |
2637 | fcoe_percpu_thread_create(cpu); | |
85b4aa49 | 2638 | |
8976f424 RL |
2639 | /* Initialize per CPU interrupt thread */ |
2640 | rc = register_hotcpu_notifier(&fcoe_cpu_notifier); | |
2641 | if (rc) | |
2642 | goto out_free; | |
85b4aa49 | 2643 | |
8976f424 | 2644 | /* Setup link change notification */ |
85b4aa49 RL |
2645 | fcoe_dev_setup(); |
2646 | ||
5892c32f CL |
2647 | rc = fcoe_if_init(); |
2648 | if (rc) | |
2649 | goto out_free; | |
85b4aa49 | 2650 | |
dfc1d0fe | 2651 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 | 2652 | return 0; |
8976f424 RL |
2653 | |
2654 | out_free: | |
2655 | for_each_online_cpu(cpu) { | |
2656 | fcoe_percpu_thread_destroy(cpu); | |
2657 | } | |
dfc1d0fe | 2658 | mutex_unlock(&fcoe_config_mutex); |
2ca32b48 | 2659 | destroy_workqueue(fcoe_wq); |
8976f424 | 2660 | return rc; |
85b4aa49 RL |
2661 | } |
2662 | module_init(fcoe_init); | |
2663 | ||
2664 | /** | |
1875f27e | 2665 | * fcoe_exit() - Clean up fcoe.ko |
85b4aa49 | 2666 | * |
1875f27e | 2667 | * Returns: 0 on success or a negative value on failure |
34f42a07 | 2668 | */ |
85b4aa49 RL |
2669 | static void __exit fcoe_exit(void) |
2670 | { | |
014f5c3f | 2671 | struct fcoe_interface *fcoe, *tmp; |
619fe4be | 2672 | struct fcoe_ctlr *ctlr; |
2e70e241 | 2673 | struct fcoe_port *port; |
1875f27e | 2674 | unsigned int cpu; |
85b4aa49 | 2675 | |
dfc1d0fe CL |
2676 | mutex_lock(&fcoe_config_mutex); |
2677 | ||
85b4aa49 RL |
2678 | fcoe_dev_cleanup(); |
2679 | ||
5919a595 | 2680 | /* releases the associated fcoe hosts */ |
090eb6c4 CL |
2681 | rtnl_lock(); |
2682 | list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { | |
619fe4be RL |
2683 | ctlr = fcoe_to_ctlr(fcoe); |
2684 | port = lport_priv(ctlr->lp); | |
f9184df3 | 2685 | fcoe_hostlist_del(port->lport); |
2ca32b48 | 2686 | queue_work(fcoe_wq, &port->destroy_work); |
c863df33 | 2687 | } |
090eb6c4 | 2688 | rtnl_unlock(); |
85b4aa49 | 2689 | |
8976f424 RL |
2690 | unregister_hotcpu_notifier(&fcoe_cpu_notifier); |
2691 | ||
014f5c3f | 2692 | for_each_online_cpu(cpu) |
8976f424 | 2693 | fcoe_percpu_thread_destroy(cpu); |
85b4aa49 | 2694 | |
dfc1d0fe | 2695 | mutex_unlock(&fcoe_config_mutex); |
2e70e241 | 2696 | |
2ca32b48 TH |
2697 | /* |
2698 | * destroy_work's may be chained but destroy_workqueue() | |
2699 | * can take care of them. Just kill the fcoe_wq. | |
2700 | */ | |
2701 | destroy_workqueue(fcoe_wq); | |
2e70e241 | 2702 | |
2ca32b48 TH |
2703 | /* |
2704 | * Detaching from the scsi transport must happen after all | |
2705 | * destroys are done on the fcoe_wq. destroy_workqueue will | |
2706 | * enusre the fcoe_wq is flushed. | |
2707 | */ | |
2e70e241 | 2708 | fcoe_if_exit(); |
78a58246 YZ |
2709 | |
2710 | /* detach from fcoe transport */ | |
2711 | fcoe_transport_detach(&fcoe_sw_transport); | |
85b4aa49 RL |
2712 | } |
2713 | module_exit(fcoe_exit); | |
11b56188 CL |
2714 | |
2715 | /** | |
2716 | * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler | |
2717 | * @seq: active sequence in the FLOGI or FDISC exchange | |
2718 | * @fp: response frame, or error encoded in a pointer (timeout) | |
2719 | * @arg: pointer the the fcoe_ctlr structure | |
2720 | * | |
65155b37 | 2721 | * This handles MAC address management for FCoE, then passes control on to |
11b56188 CL |
2722 | * the libfc FLOGI response handler. |
2723 | */ | |
2724 | static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) | |
2725 | { | |
2726 | struct fcoe_ctlr *fip = arg; | |
2727 | struct fc_exch *exch = fc_seq_exch(seq); | |
2728 | struct fc_lport *lport = exch->lp; | |
2729 | u8 *mac; | |
2730 | ||
2731 | if (IS_ERR(fp)) | |
2732 | goto done; | |
2733 | ||
2734 | mac = fr_cb(fp)->granted_mac; | |
907c07d4 VD |
2735 | /* pre-FIP */ |
2736 | if (is_zero_ether_addr(mac)) | |
2737 | fcoe_ctlr_recv_flogi(fip, lport, fp); | |
2738 | if (!is_zero_ether_addr(mac)) | |
2739 | fcoe_update_src_mac(lport, mac); | |
11b56188 CL |
2740 | done: |
2741 | fc_lport_flogi_resp(seq, fp, lport); | |
2742 | } | |
2743 | ||
2744 | /** | |
2745 | * fcoe_logo_resp() - FCoE specific LOGO response handler | |
2746 | * @seq: active sequence in the LOGO exchange | |
2747 | * @fp: response frame, or error encoded in a pointer (timeout) | |
2748 | * @arg: pointer the the fcoe_ctlr structure | |
2749 | * | |
65155b37 | 2750 | * This handles MAC address management for FCoE, then passes control on to |
11b56188 CL |
2751 | * the libfc LOGO response handler. |
2752 | */ | |
2753 | static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) | |
2754 | { | |
386309ce | 2755 | struct fc_lport *lport = arg; |
11b56188 CL |
2756 | static u8 zero_mac[ETH_ALEN] = { 0 }; |
2757 | ||
2758 | if (!IS_ERR(fp)) | |
386309ce | 2759 | fcoe_update_src_mac(lport, zero_mac); |
11b56188 CL |
2760 | fc_lport_logo_resp(seq, fp, lport); |
2761 | } | |
2762 | ||
2763 | /** | |
2764 | * fcoe_elsct_send - FCoE specific ELS handler | |
2765 | * | |
2766 | * This does special case handling of FIP encapsualted ELS exchanges for FCoE, | |
2767 | * using FCoE specific response handlers and passing the FIP controller as | |
2768 | * the argument (the lport is still available from the exchange). | |
2769 | * | |
2770 | * Most of the work here is just handed off to the libfc routine. | |
2771 | */ | |
1875f27e RL |
2772 | static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, |
2773 | struct fc_frame *fp, unsigned int op, | |
2774 | void (*resp)(struct fc_seq *, | |
2775 | struct fc_frame *, | |
2776 | void *), | |
2777 | void *arg, u32 timeout) | |
11b56188 CL |
2778 | { |
2779 | struct fcoe_port *port = lport_priv(lport); | |
8597ae8b | 2780 | struct fcoe_interface *fcoe = port->priv; |
619fe4be | 2781 | struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); |
11b56188 CL |
2782 | struct fc_frame_header *fh = fc_frame_header_get(fp); |
2783 | ||
2784 | switch (op) { | |
2785 | case ELS_FLOGI: | |
2786 | case ELS_FDISC: | |
e10f8c66 JE |
2787 | if (lport->point_to_multipoint) |
2788 | break; | |
11b56188 CL |
2789 | return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, |
2790 | fip, timeout); | |
2791 | case ELS_LOGO: | |
2792 | /* only hook onto fabric logouts, not port logouts */ | |
2793 | if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) | |
2794 | break; | |
2795 | return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, | |
386309ce | 2796 | lport, timeout); |
11b56188 CL |
2797 | } |
2798 | return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); | |
2799 | } | |
2800 | ||
9a05753b CL |
2801 | /** |
2802 | * fcoe_vport_create() - create an fc_host/scsi_host for a vport | |
2803 | * @vport: fc_vport object to create a new fc_host for | |
2804 | * @disabled: start the new fc_host in a disabled state by default? | |
2805 | * | |
2806 | * Returns: 0 for success | |
2807 | */ | |
2808 | static int fcoe_vport_create(struct fc_vport *vport, bool disabled) | |
2809 | { | |
2810 | struct Scsi_Host *shost = vport_to_shost(vport); | |
2811 | struct fc_lport *n_port = shost_priv(shost); | |
2812 | struct fcoe_port *port = lport_priv(n_port); | |
8597ae8b | 2813 | struct fcoe_interface *fcoe = port->priv; |
9a05753b CL |
2814 | struct net_device *netdev = fcoe->netdev; |
2815 | struct fc_lport *vn_port; | |
bdf25218 NP |
2816 | int rc; |
2817 | char buf[32]; | |
2818 | ||
2819 | rc = fcoe_validate_vport_create(vport); | |
2820 | if (rc) { | |
d834895c | 2821 | fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf)); |
bdf25218 NP |
2822 | printk(KERN_ERR "fcoe: Failed to create vport, " |
2823 | "WWPN (0x%s) already exists\n", | |
2824 | buf); | |
2825 | return rc; | |
2826 | } | |
9a05753b CL |
2827 | |
2828 | mutex_lock(&fcoe_config_mutex); | |
4bc71cb9 | 2829 | rtnl_lock(); |
9a05753b | 2830 | vn_port = fcoe_if_create(fcoe, &vport->dev, 1); |
4bc71cb9 | 2831 | rtnl_unlock(); |
9a05753b CL |
2832 | mutex_unlock(&fcoe_config_mutex); |
2833 | ||
2834 | if (IS_ERR(vn_port)) { | |
2835 | printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", | |
2836 | netdev->name); | |
2837 | return -EIO; | |
2838 | } | |
2839 | ||
2840 | if (disabled) { | |
2841 | fc_vport_set_state(vport, FC_VPORT_DISABLED); | |
2842 | } else { | |
2843 | vn_port->boot_time = jiffies; | |
2844 | fc_fabric_login(vn_port); | |
2845 | fc_vport_setlink(vn_port); | |
2846 | } | |
2847 | return 0; | |
2848 | } | |
2849 | ||
2850 | /** | |
2851 | * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport | |
2852 | * @vport: fc_vport object that is being destroyed | |
2853 | * | |
2854 | * Returns: 0 for success | |
2855 | */ | |
2856 | static int fcoe_vport_destroy(struct fc_vport *vport) | |
2857 | { | |
2858 | struct Scsi_Host *shost = vport_to_shost(vport); | |
2859 | struct fc_lport *n_port = shost_priv(shost); | |
2860 | struct fc_lport *vn_port = vport->dd_data; | |
9a05753b CL |
2861 | |
2862 | mutex_lock(&n_port->lp_mutex); | |
2863 | list_del(&vn_port->list); | |
2864 | mutex_unlock(&n_port->lp_mutex); | |
ccefd23e RL |
2865 | |
2866 | mutex_lock(&fcoe_config_mutex); | |
2867 | fcoe_if_destroy(vn_port); | |
2868 | mutex_unlock(&fcoe_config_mutex); | |
2869 | ||
9a05753b CL |
2870 | return 0; |
2871 | } | |
2872 | ||
2873 | /** | |
2874 | * fcoe_vport_disable() - change vport state | |
2875 | * @vport: vport to bring online/offline | |
2876 | * @disable: should the vport be disabled? | |
2877 | */ | |
2878 | static int fcoe_vport_disable(struct fc_vport *vport, bool disable) | |
2879 | { | |
2880 | struct fc_lport *lport = vport->dd_data; | |
2881 | ||
2882 | if (disable) { | |
2883 | fc_vport_set_state(vport, FC_VPORT_DISABLED); | |
2884 | fc_fabric_logoff(lport); | |
2885 | } else { | |
2886 | lport->boot_time = jiffies; | |
2887 | fc_fabric_login(lport); | |
2888 | fc_vport_setlink(lport); | |
2889 | } | |
2890 | ||
2891 | return 0; | |
2892 | } | |
2893 | ||
dc8596d3 CL |
2894 | /** |
2895 | * fcoe_vport_set_symbolic_name() - append vport string to symbolic name | |
2896 | * @vport: fc_vport with a new symbolic name string | |
2897 | * | |
2898 | * After generating a new symbolic name string, a new RSPN_ID request is | |
2899 | * sent to the name server. There is no response handler, so if it fails | |
2900 | * for some reason it will not be retried. | |
2901 | */ | |
2902 | static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) | |
2903 | { | |
2904 | struct fc_lport *lport = vport->dd_data; | |
2905 | struct fc_frame *fp; | |
2906 | size_t len; | |
2907 | ||
2908 | snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, | |
2909 | "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, | |
2910 | fcoe_netdev(lport)->name, vport->symbolic_name); | |
2911 | ||
2912 | if (lport->state != LPORT_ST_READY) | |
2913 | return; | |
2914 | ||
2915 | len = strnlen(fc_host_symbolic_name(lport->host), 255); | |
2916 | fp = fc_frame_alloc(lport, | |
2917 | sizeof(struct fc_ct_hdr) + | |
2918 | sizeof(struct fc_ns_rspn) + len); | |
2919 | if (!fp) | |
2920 | return; | |
2921 | lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, | |
b94f8951 | 2922 | NULL, NULL, 3 * lport->r_a_tov); |
dc8596d3 | 2923 | } |
b84056bf | 2924 | |
8d55e507 RL |
2925 | static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev) |
2926 | { | |
2927 | struct fcoe_ctlr_device *ctlr_dev = | |
2928 | fcoe_fcf_dev_to_ctlr_dev(fcf_dev); | |
2929 | struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); | |
2930 | struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr); | |
2931 | ||
2932 | fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev); | |
2933 | } | |
2934 | ||
7d65b0df JE |
2935 | /** |
2936 | * fcoe_set_port_id() - Callback from libfc when Port_ID is set. | |
2937 | * @lport: the local port | |
2938 | * @port_id: the port ID | |
2939 | * @fp: the received frame, if any, that caused the port_id to be set. | |
2940 | * | |
2941 | * This routine handles the case where we received a FLOGI and are | |
2942 | * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi() | |
2943 | * so it can set the non-mapped mode and gateway address. | |
2944 | * | |
2945 | * The FLOGI LS_ACC is handled by fcoe_flogi_resp(). | |
2946 | */ | |
2947 | static void fcoe_set_port_id(struct fc_lport *lport, | |
2948 | u32 port_id, struct fc_frame *fp) | |
2949 | { | |
2950 | struct fcoe_port *port = lport_priv(lport); | |
8597ae8b | 2951 | struct fcoe_interface *fcoe = port->priv; |
619fe4be | 2952 | struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); |
7d65b0df JE |
2953 | |
2954 | if (fp && fc_frame_payload_op(fp) == ELS_FLOGI) | |
619fe4be | 2955 | fcoe_ctlr_recv_flogi(ctlr, lport, fp); |
7d65b0df | 2956 | } |