Commit | Line | Data |
---|---|---|
85b4aa49 | 1 | /* |
af7f85d9 | 2 | * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved. |
85b4aa49 RL |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | * | |
17 | * Maintained at www.Open-FCoE.org | |
18 | */ | |
19 | ||
20 | #include <linux/module.h> | |
21 | #include <linux/version.h> | |
85b4aa49 | 22 | #include <linux/spinlock.h> |
85b4aa49 RL |
23 | #include <linux/netdevice.h> |
24 | #include <linux/etherdevice.h> | |
25 | #include <linux/ethtool.h> | |
26 | #include <linux/if_ether.h> | |
27 | #include <linux/if_vlan.h> | |
85b4aa49 RL |
28 | #include <linux/crc32.h> |
29 | #include <linux/cpu.h> | |
30 | #include <linux/fs.h> | |
31 | #include <linux/sysfs.h> | |
32 | #include <linux/ctype.h> | |
33 | #include <scsi/scsi_tcq.h> | |
34 | #include <scsi/scsicam.h> | |
35 | #include <scsi/scsi_transport.h> | |
36 | #include <scsi/scsi_transport_fc.h> | |
37 | #include <net/rtnetlink.h> | |
38 | ||
39 | #include <scsi/fc/fc_encaps.h> | |
97c8389d | 40 | #include <scsi/fc/fc_fip.h> |
85b4aa49 RL |
41 | |
42 | #include <scsi/libfc.h> | |
43 | #include <scsi/fc_frame.h> | |
44 | #include <scsi/libfcoe.h> | |
85b4aa49 | 45 | |
fdd78027 | 46 | #include "fcoe.h" |
7f349142 | 47 | |
85b4aa49 RL |
48 | MODULE_AUTHOR("Open-FCoE.org"); |
49 | MODULE_DESCRIPTION("FCoE"); | |
9b34ecff | 50 | MODULE_LICENSE("GPL v2"); |
85b4aa49 | 51 | |
05cc7390 YZ |
52 | /* Performance tuning parameters for fcoe */ |
53 | static unsigned int fcoe_ddp_min; | |
54 | module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR); | |
55 | MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \ | |
56 | "Direct Data Placement (DDP)."); | |
57 | ||
85b4aa49 RL |
58 | /* fcoe host list */ |
59 | LIST_HEAD(fcoe_hostlist); | |
60 | DEFINE_RWLOCK(fcoe_hostlist_lock); | |
5e5e92df | 61 | DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu); |
85b4aa49 | 62 | |
dd3fd72e | 63 | /* Function Prototypes */ |
fdd78027 VD |
64 | static int fcoe_reset(struct Scsi_Host *shost); |
65 | static int fcoe_xmit(struct fc_lport *, struct fc_frame *); | |
66 | static int fcoe_rcv(struct sk_buff *, struct net_device *, | |
67 | struct packet_type *, struct net_device *); | |
68 | static int fcoe_percpu_receive_thread(void *arg); | |
69 | static void fcoe_clean_pending_queue(struct fc_lport *lp); | |
70 | static void fcoe_percpu_clean(struct fc_lport *lp); | |
71 | static int fcoe_link_ok(struct fc_lport *lp); | |
72 | ||
73 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); | |
74 | static int fcoe_hostlist_add(const struct fc_lport *); | |
75 | static int fcoe_hostlist_remove(const struct fc_lport *); | |
76 | ||
4bb6b515 | 77 | static void fcoe_check_wait_queue(struct fc_lport *, struct sk_buff *); |
85b4aa49 RL |
78 | static int fcoe_device_notification(struct notifier_block *, ulong, void *); |
79 | static void fcoe_dev_setup(void); | |
80 | static void fcoe_dev_cleanup(void); | |
81 | ||
82 | /* notification function from net device */ | |
83 | static struct notifier_block fcoe_notifier = { | |
84 | .notifier_call = fcoe_device_notification, | |
85 | }; | |
86 | ||
7f349142 VD |
87 | static struct scsi_transport_template *scsi_transport_fcoe_sw; |
88 | ||
89 | struct fc_function_template fcoe_transport_function = { | |
90 | .show_host_node_name = 1, | |
91 | .show_host_port_name = 1, | |
92 | .show_host_supported_classes = 1, | |
93 | .show_host_supported_fc4s = 1, | |
94 | .show_host_active_fc4s = 1, | |
95 | .show_host_maxframe_size = 1, | |
96 | ||
97 | .show_host_port_id = 1, | |
98 | .show_host_supported_speeds = 1, | |
99 | .get_host_speed = fc_get_host_speed, | |
100 | .show_host_speed = 1, | |
101 | .show_host_port_type = 1, | |
102 | .get_host_port_state = fc_get_host_port_state, | |
103 | .show_host_port_state = 1, | |
104 | .show_host_symbolic_name = 1, | |
105 | ||
106 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
107 | .show_rport_maxframe_size = 1, | |
108 | .show_rport_supported_classes = 1, | |
109 | ||
110 | .show_host_fabric_name = 1, | |
111 | .show_starget_node_name = 1, | |
112 | .show_starget_port_name = 1, | |
113 | .show_starget_port_id = 1, | |
114 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
115 | .show_rport_dev_loss_tmo = 1, | |
116 | .get_fc_host_stats = fc_get_host_stats, | |
117 | .issue_fc_host_lip = fcoe_reset, | |
118 | ||
119 | .terminate_rport_io = fc_rport_terminate_io, | |
120 | }; | |
121 | ||
122 | static struct scsi_host_template fcoe_shost_template = { | |
123 | .module = THIS_MODULE, | |
124 | .name = "FCoE Driver", | |
125 | .proc_name = FCOE_NAME, | |
126 | .queuecommand = fc_queuecommand, | |
127 | .eh_abort_handler = fc_eh_abort, | |
128 | .eh_device_reset_handler = fc_eh_device_reset, | |
129 | .eh_host_reset_handler = fc_eh_host_reset, | |
130 | .slave_alloc = fc_slave_alloc, | |
131 | .change_queue_depth = fc_change_queue_depth, | |
132 | .change_queue_type = fc_change_queue_type, | |
133 | .this_id = -1, | |
134 | .cmd_per_lun = 32, | |
135 | .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, | |
136 | .use_clustering = ENABLE_CLUSTERING, | |
137 | .sg_tablesize = SG_ALL, | |
138 | .max_sectors = 0xffff, | |
139 | }; | |
140 | ||
54b649f8 CL |
141 | static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *dev, |
142 | struct packet_type *ptype, | |
143 | struct net_device *orig_dev); | |
144 | /** | |
145 | * fcoe_interface_setup() | |
146 | * @fcoe: new fcoe_interface | |
147 | * @netdev : ptr to the associated netdevice struct | |
148 | * | |
149 | * Returns : 0 for success | |
150 | */ | |
151 | static int fcoe_interface_setup(struct fcoe_interface *fcoe, | |
152 | struct net_device *netdev) | |
153 | { | |
154 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
155 | struct netdev_hw_addr *ha; | |
156 | u8 flogi_maddr[ETH_ALEN]; | |
157 | ||
158 | fcoe->netdev = netdev; | |
159 | ||
160 | /* Do not support for bonding device */ | |
161 | if ((netdev->priv_flags & IFF_MASTER_ALB) || | |
162 | (netdev->priv_flags & IFF_SLAVE_INACTIVE) || | |
163 | (netdev->priv_flags & IFF_MASTER_8023AD)) { | |
164 | return -EOPNOTSUPP; | |
165 | } | |
166 | ||
167 | /* look for SAN MAC address, if multiple SAN MACs exist, only | |
168 | * use the first one for SPMA */ | |
169 | rcu_read_lock(); | |
170 | for_each_dev_addr(netdev, ha) { | |
171 | if ((ha->type == NETDEV_HW_ADDR_T_SAN) && | |
172 | (is_valid_ether_addr(fip->ctl_src_addr))) { | |
173 | memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); | |
174 | fip->spma = 1; | |
175 | break; | |
176 | } | |
177 | } | |
178 | rcu_read_unlock(); | |
179 | ||
180 | /* setup Source Mac Address */ | |
181 | if (!fip->spma) | |
182 | memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); | |
183 | ||
184 | /* | |
185 | * Add FCoE MAC address as second unicast MAC address | |
186 | * or enter promiscuous mode if not capable of listening | |
187 | * for multiple unicast MACs. | |
188 | */ | |
189 | rtnl_lock(); | |
190 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); | |
191 | dev_unicast_add(netdev, flogi_maddr); | |
192 | if (fip->spma) | |
193 | dev_unicast_add(netdev, fip->ctl_src_addr); | |
194 | dev_mc_add(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0); | |
195 | rtnl_unlock(); | |
196 | ||
197 | /* | |
198 | * setup the receive function from ethernet driver | |
199 | * on the ethertype for the given device | |
200 | */ | |
201 | fcoe->fcoe_packet_type.func = fcoe_rcv; | |
202 | fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE); | |
203 | fcoe->fcoe_packet_type.dev = netdev; | |
204 | dev_add_pack(&fcoe->fcoe_packet_type); | |
205 | ||
206 | fcoe->fip_packet_type.func = fcoe_fip_recv; | |
207 | fcoe->fip_packet_type.type = htons(ETH_P_FIP); | |
208 | fcoe->fip_packet_type.dev = netdev; | |
209 | dev_add_pack(&fcoe->fip_packet_type); | |
210 | ||
211 | return 0; | |
212 | } | |
213 | ||
214 | static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb); | |
215 | static void fcoe_update_src_mac(struct fcoe_ctlr *fip, u8 *old, u8 *new); | |
216 | ||
030f4e00 CL |
217 | /** |
218 | * fcoe_interface_create() | |
219 | * @netdev: network interface | |
220 | * | |
221 | * Returns: pointer to a struct fcoe_interface or NULL on error | |
222 | */ | |
223 | static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev) | |
224 | { | |
225 | struct fcoe_interface *fcoe; | |
226 | ||
227 | fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL); | |
228 | if (!fcoe) { | |
229 | FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n"); | |
230 | return NULL; | |
231 | } | |
232 | ||
233 | kref_init(&fcoe->kref); | |
54b649f8 CL |
234 | |
235 | /* | |
236 | * Initialize FIP. | |
237 | */ | |
238 | fcoe_ctlr_init(&fcoe->ctlr); | |
239 | fcoe->ctlr.send = fcoe_fip_send; | |
240 | fcoe->ctlr.update_mac = fcoe_update_src_mac; | |
241 | ||
242 | fcoe_interface_setup(fcoe, netdev); | |
030f4e00 CL |
243 | |
244 | return fcoe; | |
245 | } | |
246 | ||
54b649f8 CL |
247 | /** |
248 | * fcoe_interface_cleanup() - clean up netdev configurations | |
249 | * @fcoe: | |
250 | */ | |
251 | void fcoe_interface_cleanup(struct fcoe_interface *fcoe) | |
252 | { | |
253 | struct net_device *netdev = fcoe->netdev; | |
254 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
255 | u8 flogi_maddr[ETH_ALEN]; | |
256 | ||
257 | /* | |
258 | * Don't listen for Ethernet packets anymore. | |
259 | * synchronize_net() ensures that the packet handlers are not running | |
260 | * on another CPU. dev_remove_pack() would do that, this calls the | |
261 | * unsyncronized version __dev_remove_pack() to avoid multiple delays. | |
262 | */ | |
263 | __dev_remove_pack(&fcoe->fcoe_packet_type); | |
264 | __dev_remove_pack(&fcoe->fip_packet_type); | |
265 | synchronize_net(); | |
266 | ||
267 | /* tear-down the FCoE controller */ | |
268 | fcoe_ctlr_destroy(&fcoe->ctlr); | |
269 | ||
270 | /* Delete secondary MAC addresses */ | |
271 | rtnl_lock(); | |
272 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); | |
273 | dev_unicast_delete(netdev, flogi_maddr); | |
274 | if (!is_zero_ether_addr(fip->data_src_addr)) | |
275 | dev_unicast_delete(netdev, fip->data_src_addr); | |
276 | if (fip->spma) | |
277 | dev_unicast_delete(netdev, fip->ctl_src_addr); | |
278 | dev_mc_delete(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0); | |
279 | rtnl_unlock(); | |
280 | } | |
281 | ||
030f4e00 CL |
282 | /** |
283 | * fcoe_interface_release() - fcoe_port kref release function | |
284 | * @kref: embedded reference count in an fcoe_interface struct | |
285 | */ | |
286 | static void fcoe_interface_release(struct kref *kref) | |
287 | { | |
288 | struct fcoe_interface *fcoe; | |
289 | ||
290 | fcoe = container_of(kref, struct fcoe_interface, kref); | |
54b649f8 | 291 | fcoe_interface_cleanup(fcoe); |
030f4e00 CL |
292 | kfree(fcoe); |
293 | } | |
294 | ||
295 | /** | |
296 | * fcoe_interface_get() | |
297 | * @fcoe: | |
298 | */ | |
299 | static inline void fcoe_interface_get(struct fcoe_interface *fcoe) | |
300 | { | |
301 | kref_get(&fcoe->kref); | |
302 | } | |
303 | ||
304 | /** | |
305 | * fcoe_interface_put() | |
306 | * @fcoe: | |
307 | */ | |
308 | static inline void fcoe_interface_put(struct fcoe_interface *fcoe) | |
309 | { | |
310 | kref_put(&fcoe->kref, fcoe_interface_release); | |
311 | } | |
312 | ||
ab6b85c1 VD |
313 | /** |
314 | * fcoe_fip_recv - handle a received FIP frame. | |
315 | * @skb: the receive skb | |
316 | * @dev: associated &net_device | |
317 | * @ptype: the &packet_type structure which was used to register this handler. | |
318 | * @orig_dev: original receive &net_device, in case @dev is a bond. | |
319 | * | |
320 | * Returns: 0 for success | |
321 | */ | |
322 | static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *dev, | |
323 | struct packet_type *ptype, | |
324 | struct net_device *orig_dev) | |
325 | { | |
259ad85d | 326 | struct fcoe_interface *fcoe; |
ab6b85c1 | 327 | |
259ad85d | 328 | fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); |
3fe9a0ba | 329 | fcoe_ctlr_recv(&fcoe->ctlr, skb); |
ab6b85c1 VD |
330 | return 0; |
331 | } | |
332 | ||
333 | /** | |
334 | * fcoe_fip_send() - send an Ethernet-encapsulated FIP frame. | |
335 | * @fip: FCoE controller. | |
336 | * @skb: FIP Packet. | |
337 | */ | |
338 | static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
339 | { | |
3fe9a0ba | 340 | skb->dev = fcoe_from_ctlr(fip)->netdev; |
ab6b85c1 VD |
341 | dev_queue_xmit(skb); |
342 | } | |
343 | ||
344 | /** | |
345 | * fcoe_update_src_mac() - Update Ethernet MAC filters. | |
346 | * @fip: FCoE controller. | |
347 | * @old: Unicast MAC address to delete if the MAC is non-zero. | |
348 | * @new: Unicast MAC address to add. | |
349 | * | |
350 | * Remove any previously-set unicast MAC filter. | |
351 | * Add secondary FCoE MAC address filter for our OUI. | |
352 | */ | |
353 | static void fcoe_update_src_mac(struct fcoe_ctlr *fip, u8 *old, u8 *new) | |
354 | { | |
25024989 | 355 | struct fcoe_interface *fcoe; |
25024989 | 356 | |
3fe9a0ba | 357 | fcoe = fcoe_from_ctlr(fip); |
ab6b85c1 VD |
358 | rtnl_lock(); |
359 | if (!is_zero_ether_addr(old)) | |
25024989 CL |
360 | dev_unicast_delete(fcoe->netdev, old); |
361 | dev_unicast_add(fcoe->netdev, new); | |
ab6b85c1 VD |
362 | rtnl_unlock(); |
363 | } | |
364 | ||
7f349142 VD |
365 | /** |
366 | * fcoe_lport_config() - sets up the fc_lport | |
367 | * @lp: ptr to the fc_lport | |
7f349142 VD |
368 | * |
369 | * Returns: 0 for success | |
370 | */ | |
371 | static int fcoe_lport_config(struct fc_lport *lp) | |
372 | { | |
373 | lp->link_up = 0; | |
374 | lp->qfull = 0; | |
375 | lp->max_retry_count = 3; | |
a3666955 | 376 | lp->max_rport_retry_count = 3; |
7f349142 VD |
377 | lp->e_d_tov = 2 * 1000; /* FC-FS default */ |
378 | lp->r_a_tov = 2 * 2 * 1000; | |
379 | lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | | |
380 | FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); | |
381 | ||
382 | fc_lport_init_stats(lp); | |
383 | ||
384 | /* lport fc_lport related configuration */ | |
385 | fc_lport_config(lp); | |
386 | ||
387 | /* offload related configuration */ | |
388 | lp->crc_offload = 0; | |
389 | lp->seq_offload = 0; | |
390 | lp->lro_enabled = 0; | |
391 | lp->lro_xid = 0; | |
392 | lp->lso_max = 0; | |
393 | ||
394 | return 0; | |
395 | } | |
396 | ||
1047f221 VD |
397 | /** |
398 | * fcoe_queue_timer() - fcoe queue timer | |
399 | * @lp: the fc_lport pointer | |
400 | * | |
401 | * Calls fcoe_check_wait_queue on timeout | |
402 | * | |
403 | */ | |
404 | static void fcoe_queue_timer(ulong lp) | |
405 | { | |
406 | fcoe_check_wait_queue((struct fc_lport *)lp, NULL); | |
407 | } | |
408 | ||
7f349142 VD |
409 | /** |
410 | * fcoe_netdev_config() - Set up netdev for SW FCoE | |
411 | * @lp : ptr to the fc_lport | |
412 | * @netdev : ptr to the associated netdevice struct | |
413 | * | |
414 | * Must be called after fcoe_lport_config() as it will use lport mutex | |
415 | * | |
416 | * Returns : 0 for success | |
417 | */ | |
418 | static int fcoe_netdev_config(struct fc_lport *lp, struct net_device *netdev) | |
419 | { | |
420 | u32 mfs; | |
421 | u64 wwnn, wwpn; | |
25024989 | 422 | struct fcoe_interface *fcoe; |
014f5c3f | 423 | struct fcoe_port *port; |
7f349142 VD |
424 | |
425 | /* Setup lport private data to point to fcoe softc */ | |
014f5c3f | 426 | port = lport_priv(lp); |
25024989 | 427 | fcoe = port->fcoe; |
7f349142 VD |
428 | |
429 | /* | |
430 | * Determine max frame size based on underlying device and optional | |
431 | * user-configured limit. If the MFS is too low, fcoe_link_ok() | |
432 | * will return 0, so do this first. | |
433 | */ | |
1d1b88dc VD |
434 | mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + |
435 | sizeof(struct fcoe_crc_eof)); | |
7f349142 VD |
436 | if (fc_set_mfs(lp, mfs)) |
437 | return -EINVAL; | |
438 | ||
7f349142 | 439 | /* offload features support */ |
1d1b88dc | 440 | if (netdev->features & NETIF_F_SG) |
7f349142 VD |
441 | lp->sg_supp = 1; |
442 | ||
7f349142 VD |
443 | if (netdev->features & NETIF_F_FCOE_CRC) { |
444 | lp->crc_offload = 1; | |
d5488eb9 | 445 | FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); |
7f349142 | 446 | } |
7f349142 VD |
447 | if (netdev->features & NETIF_F_FSO) { |
448 | lp->seq_offload = 1; | |
449 | lp->lso_max = netdev->gso_max_size; | |
d5488eb9 RL |
450 | FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", |
451 | lp->lso_max); | |
7f349142 | 452 | } |
7f349142 VD |
453 | if (netdev->fcoe_ddp_xid) { |
454 | lp->lro_enabled = 1; | |
455 | lp->lro_xid = netdev->fcoe_ddp_xid; | |
d5488eb9 RL |
456 | FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", |
457 | lp->lro_xid); | |
7f349142 | 458 | } |
014f5c3f CL |
459 | skb_queue_head_init(&port->fcoe_pending_queue); |
460 | port->fcoe_pending_queue_active = 0; | |
461 | setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lp); | |
7f349142 | 462 | |
1d1b88dc | 463 | wwnn = fcoe_wwn_from_mac(netdev->dev_addr, 1, 0); |
7f349142 VD |
464 | fc_set_wwnn(lp, wwnn); |
465 | /* XXX - 3rd arg needs to be vlan id */ | |
1d1b88dc | 466 | wwpn = fcoe_wwn_from_mac(netdev->dev_addr, 2, 0); |
7f349142 VD |
467 | fc_set_wwpn(lp, wwpn); |
468 | ||
7f349142 VD |
469 | return 0; |
470 | } | |
471 | ||
472 | /** | |
473 | * fcoe_shost_config() - Sets up fc_lport->host | |
474 | * @lp : ptr to the fc_lport | |
475 | * @shost : ptr to the associated scsi host | |
476 | * @dev : device associated to scsi host | |
477 | * | |
478 | * Must be called after fcoe_lport_config() and fcoe_netdev_config() | |
479 | * | |
480 | * Returns : 0 for success | |
481 | */ | |
482 | static int fcoe_shost_config(struct fc_lport *lp, struct Scsi_Host *shost, | |
483 | struct device *dev) | |
484 | { | |
485 | int rc = 0; | |
486 | ||
487 | /* lport scsi host config */ | |
488 | lp->host = shost; | |
489 | ||
490 | lp->host->max_lun = FCOE_MAX_LUN; | |
491 | lp->host->max_id = FCOE_MAX_FCP_TARGET; | |
492 | lp->host->max_channel = 0; | |
493 | lp->host->transportt = scsi_transport_fcoe_sw; | |
494 | ||
495 | /* add the new host to the SCSI-ml */ | |
496 | rc = scsi_add_host(lp->host, dev); | |
497 | if (rc) { | |
d5488eb9 RL |
498 | FCOE_NETDEV_DBG(fcoe_netdev(lp), "fcoe_shost_config: " |
499 | "error on scsi_add_host\n"); | |
7f349142 VD |
500 | return rc; |
501 | } | |
502 | sprintf(fc_host_symbolic_name(lp->host), "%s v%s over %s", | |
503 | FCOE_NAME, FCOE_VERSION, | |
504 | fcoe_netdev(lp)->name); | |
505 | ||
506 | return 0; | |
507 | } | |
508 | ||
d7179680 VD |
509 | /* |
510 | * fcoe_oem_match() - match for read types IO | |
511 | * @fp: the fc_frame for new IO. | |
512 | * | |
513 | * Returns : true for read types IO, otherwise returns false. | |
514 | */ | |
515 | bool fcoe_oem_match(struct fc_frame *fp) | |
516 | { | |
05cc7390 YZ |
517 | return fc_fcp_is_read(fr_fsp(fp)) && |
518 | (fr_fsp(fp)->data_len > fcoe_ddp_min); | |
d7179680 VD |
519 | } |
520 | ||
7f349142 VD |
521 | /** |
522 | * fcoe_em_config() - allocates em for this lport | |
014f5c3f | 523 | * @lp: the fcoe that em is to allocated for |
7f349142 | 524 | * |
e8af4d43 VD |
525 | * Called with write fcoe_hostlist_lock held. |
526 | * | |
7f349142 VD |
527 | * Returns : 0 on success |
528 | */ | |
529 | static inline int fcoe_em_config(struct fc_lport *lp) | |
530 | { | |
014f5c3f | 531 | struct fcoe_port *port = lport_priv(lp); |
25024989 CL |
532 | struct fcoe_interface *fcoe = port->fcoe; |
533 | struct fcoe_interface *oldfcoe = NULL; | |
1d1b88dc | 534 | struct net_device *old_real_dev, *cur_real_dev; |
d7179680 VD |
535 | u16 min_xid = FCOE_MIN_XID; |
536 | u16 max_xid = FCOE_MAX_XID; | |
537 | ||
538 | /* | |
539 | * Check if need to allocate an em instance for | |
540 | * offload exchange ids to be shared across all VN_PORTs/lport. | |
541 | */ | |
542 | if (!lp->lro_enabled || !lp->lro_xid || (lp->lro_xid >= max_xid)) { | |
543 | lp->lro_xid = 0; | |
544 | goto skip_oem; | |
545 | } | |
546 | ||
547 | /* | |
548 | * Reuse existing offload em instance in case | |
1d1b88dc | 549 | * it is already allocated on real eth device |
d7179680 | 550 | */ |
25024989 CL |
551 | if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
552 | cur_real_dev = vlan_dev_real_dev(fcoe->netdev); | |
1d1b88dc | 553 | else |
25024989 | 554 | cur_real_dev = fcoe->netdev; |
1d1b88dc | 555 | |
25024989 | 556 | list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { |
25024989 CL |
557 | if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
558 | old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); | |
1d1b88dc | 559 | else |
25024989 | 560 | old_real_dev = oldfcoe->netdev; |
1d1b88dc VD |
561 | |
562 | if (cur_real_dev == old_real_dev) { | |
991cbb60 | 563 | fcoe->oem = oldfcoe->oem; |
d7179680 VD |
564 | break; |
565 | } | |
566 | } | |
567 | ||
991cbb60 CL |
568 | if (fcoe->oem) { |
569 | if (!fc_exch_mgr_add(lp, fcoe->oem, fcoe_oem_match)) { | |
d7179680 VD |
570 | printk(KERN_ERR "fcoe_em_config: failed to add " |
571 | "offload em:%p on interface:%s\n", | |
991cbb60 | 572 | fcoe->oem, fcoe->netdev->name); |
d7179680 VD |
573 | return -ENOMEM; |
574 | } | |
575 | } else { | |
991cbb60 | 576 | fcoe->oem = fc_exch_mgr_alloc(lp, FC_CLASS_3, |
d7179680 VD |
577 | FCOE_MIN_XID, lp->lro_xid, |
578 | fcoe_oem_match); | |
991cbb60 | 579 | if (!fcoe->oem) { |
d7179680 VD |
580 | printk(KERN_ERR "fcoe_em_config: failed to allocate " |
581 | "em for offload exches on interface:%s\n", | |
25024989 | 582 | fcoe->netdev->name); |
d7179680 VD |
583 | return -ENOMEM; |
584 | } | |
585 | } | |
586 | ||
587 | /* | |
588 | * Exclude offload EM xid range from next EM xid range. | |
589 | */ | |
590 | min_xid += lp->lro_xid + 1; | |
591 | ||
592 | skip_oem: | |
593 | if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, min_xid, max_xid, NULL)) { | |
594 | printk(KERN_ERR "fcoe_em_config: failed to " | |
25024989 | 595 | "allocate em on interface %s\n", fcoe->netdev->name); |
7f349142 | 596 | return -ENOMEM; |
d7179680 | 597 | } |
7f349142 VD |
598 | |
599 | return 0; | |
600 | } | |
601 | ||
602 | /** | |
603 | * fcoe_if_destroy() - FCoE software HBA tear-down function | |
af7f85d9 | 604 | * @lport: fc_lport to destroy |
7f349142 | 605 | */ |
af7f85d9 | 606 | static void fcoe_if_destroy(struct fc_lport *lport) |
7f349142 | 607 | { |
014f5c3f CL |
608 | struct fcoe_port *port = lport_priv(lport); |
609 | struct fcoe_interface *fcoe = port->fcoe; | |
25024989 | 610 | struct net_device *netdev = fcoe->netdev; |
7f349142 | 611 | |
d5488eb9 | 612 | FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); |
7f349142 | 613 | |
7f349142 | 614 | /* Logout of the fabric */ |
af7f85d9 | 615 | fc_fabric_logoff(lport); |
7f349142 VD |
616 | |
617 | /* Remove the instance from fcoe's list */ | |
af7f85d9 | 618 | fcoe_hostlist_remove(lport); |
7f349142 | 619 | |
54b649f8 CL |
620 | /* Cleanup the fc_lport */ |
621 | fc_lport_destroy(lport); | |
622 | fc_fcp_destroy(lport); | |
623 | ||
624 | /* Stop the transmit retry timer */ | |
625 | del_timer_sync(&port->timer); | |
ab6b85c1 | 626 | |
54b649f8 CL |
627 | /* Free existing transmit skbs */ |
628 | fcoe_clean_pending_queue(lport); | |
629 | ||
630 | /* receives may not be stopped until after this */ | |
631 | fcoe_interface_put(fcoe); | |
7f349142 | 632 | |
f161fb72 | 633 | /* Free queued packets for the per-CPU receive threads */ |
af7f85d9 | 634 | fcoe_percpu_clean(lport); |
f161fb72 | 635 | |
7f349142 | 636 | /* Detach from the scsi-ml */ |
af7f85d9 CL |
637 | fc_remove_host(lport->host); |
638 | scsi_remove_host(lport->host); | |
7f349142 VD |
639 | |
640 | /* There are no more rports or I/O, free the EM */ | |
af7f85d9 | 641 | fc_exch_mgr_free(lport); |
7f349142 | 642 | |
7f349142 | 643 | /* Free memory used by statistical counters */ |
af7f85d9 | 644 | fc_lport_free_stats(lport); |
7f349142 VD |
645 | |
646 | /* Release the net_device and Scsi_Host */ | |
1d1b88dc | 647 | dev_put(netdev); |
af7f85d9 | 648 | scsi_host_put(lport->host); |
7f349142 VD |
649 | } |
650 | ||
651 | /* | |
652 | * fcoe_ddp_setup - calls LLD's ddp_setup through net_device | |
653 | * @lp: the corresponding fc_lport | |
654 | * @xid: the exchange id for this ddp transfer | |
655 | * @sgl: the scatterlist describing this transfer | |
656 | * @sgc: number of sg items | |
657 | * | |
658 | * Returns : 0 no ddp | |
659 | */ | |
660 | static int fcoe_ddp_setup(struct fc_lport *lp, u16 xid, | |
661 | struct scatterlist *sgl, unsigned int sgc) | |
662 | { | |
663 | struct net_device *n = fcoe_netdev(lp); | |
664 | ||
665 | if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_setup) | |
666 | return n->netdev_ops->ndo_fcoe_ddp_setup(n, xid, sgl, sgc); | |
667 | ||
668 | return 0; | |
669 | } | |
670 | ||
671 | /* | |
672 | * fcoe_ddp_done - calls LLD's ddp_done through net_device | |
673 | * @lp: the corresponding fc_lport | |
674 | * @xid: the exchange id for this ddp transfer | |
675 | * | |
676 | * Returns : the length of data that have been completed by ddp | |
677 | */ | |
678 | static int fcoe_ddp_done(struct fc_lport *lp, u16 xid) | |
679 | { | |
680 | struct net_device *n = fcoe_netdev(lp); | |
681 | ||
682 | if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_done) | |
683 | return n->netdev_ops->ndo_fcoe_ddp_done(n, xid); | |
684 | return 0; | |
685 | } | |
686 | ||
687 | static struct libfc_function_template fcoe_libfc_fcn_templ = { | |
688 | .frame_send = fcoe_xmit, | |
689 | .ddp_setup = fcoe_ddp_setup, | |
690 | .ddp_done = fcoe_ddp_done, | |
691 | }; | |
692 | ||
693 | /** | |
030f4e00 CL |
694 | * fcoe_if_create() - this function creates the fcoe port |
695 | * @fcoe: fcoe_interface structure to create an fc_lport instance on | |
af7f85d9 | 696 | * @parent: device pointer to be the parent in sysfs for the SCSI host |
7f349142 | 697 | * |
54b649f8 | 698 | * Creates fc_lport struct and scsi_host for lport, configures lport. |
7f349142 | 699 | * |
af7f85d9 | 700 | * Returns : The allocated fc_lport or an error pointer |
7f349142 | 701 | */ |
030f4e00 | 702 | static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, |
af7f85d9 | 703 | struct device *parent) |
7f349142 VD |
704 | { |
705 | int rc; | |
af7f85d9 | 706 | struct fc_lport *lport = NULL; |
014f5c3f | 707 | struct fcoe_port *port; |
7f349142 | 708 | struct Scsi_Host *shost; |
030f4e00 | 709 | struct net_device *netdev = fcoe->netdev; |
7f349142 | 710 | |
d5488eb9 | 711 | FCOE_NETDEV_DBG(netdev, "Create Interface\n"); |
7f349142 | 712 | |
a0a25da2 | 713 | shost = libfc_host_alloc(&fcoe_shost_template, |
014f5c3f | 714 | sizeof(struct fcoe_port)); |
7f349142 | 715 | if (!shost) { |
d5488eb9 | 716 | FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); |
af7f85d9 | 717 | rc = -ENOMEM; |
030f4e00 | 718 | goto out; |
7f349142 | 719 | } |
af7f85d9 | 720 | lport = shost_priv(shost); |
014f5c3f | 721 | port = lport_priv(lport); |
014f5c3f | 722 | port->fcoe = fcoe; |
7f349142 VD |
723 | |
724 | /* configure fc_lport, e.g., em */ | |
af7f85d9 | 725 | rc = fcoe_lport_config(lport); |
7f349142 | 726 | if (rc) { |
d5488eb9 RL |
727 | FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " |
728 | "interface\n"); | |
7f349142 VD |
729 | goto out_host_put; |
730 | } | |
731 | ||
ab6b85c1 | 732 | /* configure lport network properties */ |
af7f85d9 | 733 | rc = fcoe_netdev_config(lport, netdev); |
ab6b85c1 | 734 | if (rc) { |
d5488eb9 RL |
735 | FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " |
736 | "interface\n"); | |
54b649f8 | 737 | goto out_lp_destroy; |
ab6b85c1 | 738 | } |
97c8389d | 739 | |
7f349142 | 740 | /* configure lport scsi host properties */ |
af7f85d9 | 741 | rc = fcoe_shost_config(lport, shost, parent); |
7f349142 | 742 | if (rc) { |
d5488eb9 RL |
743 | FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " |
744 | "interface\n"); | |
54b649f8 | 745 | goto out_lp_destroy; |
7f349142 VD |
746 | } |
747 | ||
96316099 | 748 | /* Initialize the library */ |
af7f85d9 | 749 | rc = fcoe_libfc_config(lport, &fcoe_libfc_fcn_templ); |
7f349142 | 750 | if (rc) { |
96316099 | 751 | FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " |
d5488eb9 | 752 | "interface\n"); |
96316099 | 753 | goto out_lp_destroy; |
7f349142 VD |
754 | } |
755 | ||
e8af4d43 VD |
756 | /* |
757 | * fcoe_em_alloc() and fcoe_hostlist_add() both | |
758 | * need to be atomic under fcoe_hostlist_lock | |
759 | * since fcoe_em_alloc() looks for an existing EM | |
760 | * instance on host list updated by fcoe_hostlist_add(). | |
761 | */ | |
762 | write_lock(&fcoe_hostlist_lock); | |
96316099 | 763 | /* lport exch manager allocation */ |
af7f85d9 | 764 | rc = fcoe_em_config(lport); |
7f349142 | 765 | if (rc) { |
96316099 | 766 | FCOE_NETDEV_DBG(netdev, "Could not configure the EM for the " |
d5488eb9 | 767 | "interface\n"); |
7f349142 VD |
768 | goto out_lp_destroy; |
769 | } | |
770 | ||
771 | /* add to lports list */ | |
af7f85d9 | 772 | fcoe_hostlist_add(lport); |
e8af4d43 | 773 | write_unlock(&fcoe_hostlist_lock); |
7f349142 | 774 | |
7f349142 | 775 | dev_hold(netdev); |
030f4e00 | 776 | fcoe_interface_get(fcoe); |
af7f85d9 | 777 | return lport; |
7f349142 VD |
778 | |
779 | out_lp_destroy: | |
af7f85d9 | 780 | fc_exch_mgr_free(lport); |
7f349142 | 781 | out_host_put: |
af7f85d9 CL |
782 | scsi_host_put(lport->host); |
783 | out: | |
784 | return ERR_PTR(rc); | |
7f349142 VD |
785 | } |
786 | ||
787 | /** | |
788 | * fcoe_if_init() - attach to scsi transport | |
789 | * | |
790 | * Returns : 0 on success | |
791 | */ | |
792 | static int __init fcoe_if_init(void) | |
793 | { | |
794 | /* attach to scsi transport */ | |
795 | scsi_transport_fcoe_sw = | |
796 | fc_attach_transport(&fcoe_transport_function); | |
797 | ||
798 | if (!scsi_transport_fcoe_sw) { | |
d5488eb9 | 799 | printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); |
7f349142 VD |
800 | return -ENODEV; |
801 | } | |
802 | ||
803 | return 0; | |
804 | } | |
805 | ||
806 | /** | |
807 | * fcoe_if_exit() - detach from scsi transport | |
808 | * | |
809 | * Returns : 0 on success | |
810 | */ | |
811 | int __exit fcoe_if_exit(void) | |
812 | { | |
813 | fc_release_transport(scsi_transport_fcoe_sw); | |
814 | return 0; | |
815 | } | |
816 | ||
8976f424 RL |
817 | /** |
818 | * fcoe_percpu_thread_create() - Create a receive thread for an online cpu | |
819 | * @cpu: cpu index for the online cpu | |
820 | */ | |
821 | static void fcoe_percpu_thread_create(unsigned int cpu) | |
822 | { | |
823 | struct fcoe_percpu_s *p; | |
824 | struct task_struct *thread; | |
825 | ||
826 | p = &per_cpu(fcoe_percpu, cpu); | |
827 | ||
828 | thread = kthread_create(fcoe_percpu_receive_thread, | |
829 | (void *)p, "fcoethread/%d", cpu); | |
830 | ||
831 | if (likely(!IS_ERR(p->thread))) { | |
832 | kthread_bind(thread, cpu); | |
833 | wake_up_process(thread); | |
834 | ||
835 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
836 | p->thread = thread; | |
837 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
838 | } | |
839 | } | |
840 | ||
841 | /** | |
842 | * fcoe_percpu_thread_destroy() - removes the rx thread for the given cpu | |
843 | * @cpu: cpu index the rx thread is to be removed | |
844 | * | |
845 | * Destroys a per-CPU Rx thread. Any pending skbs are moved to the | |
846 | * current CPU's Rx thread. If the thread being destroyed is bound to | |
847 | * the CPU processing this context the skbs will be freed. | |
848 | */ | |
849 | static void fcoe_percpu_thread_destroy(unsigned int cpu) | |
850 | { | |
851 | struct fcoe_percpu_s *p; | |
852 | struct task_struct *thread; | |
853 | struct page *crc_eof; | |
854 | struct sk_buff *skb; | |
855 | #ifdef CONFIG_SMP | |
856 | struct fcoe_percpu_s *p0; | |
857 | unsigned targ_cpu = smp_processor_id(); | |
858 | #endif /* CONFIG_SMP */ | |
859 | ||
d5488eb9 | 860 | FCOE_DBG("Destroying receive thread for CPU %d\n", cpu); |
8976f424 RL |
861 | |
862 | /* Prevent any new skbs from being queued for this CPU. */ | |
863 | p = &per_cpu(fcoe_percpu, cpu); | |
864 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
865 | thread = p->thread; | |
866 | p->thread = NULL; | |
867 | crc_eof = p->crc_eof_page; | |
868 | p->crc_eof_page = NULL; | |
869 | p->crc_eof_offset = 0; | |
870 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
871 | ||
872 | #ifdef CONFIG_SMP | |
873 | /* | |
874 | * Don't bother moving the skb's if this context is running | |
875 | * on the same CPU that is having its thread destroyed. This | |
876 | * can easily happen when the module is removed. | |
877 | */ | |
878 | if (cpu != targ_cpu) { | |
879 | p0 = &per_cpu(fcoe_percpu, targ_cpu); | |
880 | spin_lock_bh(&p0->fcoe_rx_list.lock); | |
881 | if (p0->thread) { | |
d5488eb9 RL |
882 | FCOE_DBG("Moving frames from CPU %d to CPU %d\n", |
883 | cpu, targ_cpu); | |
8976f424 RL |
884 | |
885 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
886 | __skb_queue_tail(&p0->fcoe_rx_list, skb); | |
887 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
888 | } else { | |
889 | /* | |
890 | * The targeted CPU is not initialized and cannot accept | |
891 | * new skbs. Unlock the targeted CPU and drop the skbs | |
892 | * on the CPU that is going offline. | |
893 | */ | |
894 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
895 | kfree_skb(skb); | |
896 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
897 | } | |
898 | } else { | |
899 | /* | |
900 | * This scenario occurs when the module is being removed | |
901 | * and all threads are being destroyed. skbs will continue | |
902 | * to be shifted from the CPU thread that is being removed | |
903 | * to the CPU thread associated with the CPU that is processing | |
904 | * the module removal. Once there is only one CPU Rx thread it | |
905 | * will reach this case and we will drop all skbs and later | |
906 | * stop the thread. | |
907 | */ | |
908 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
909 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
910 | kfree_skb(skb); | |
911 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
912 | } | |
913 | #else | |
914 | /* | |
dd3fd72e | 915 | * This a non-SMP scenario where the singular Rx thread is |
8976f424 RL |
916 | * being removed. Free all skbs and stop the thread. |
917 | */ | |
918 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
919 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
920 | kfree_skb(skb); | |
921 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
922 | #endif | |
923 | ||
924 | if (thread) | |
925 | kthread_stop(thread); | |
926 | ||
927 | if (crc_eof) | |
928 | put_page(crc_eof); | |
929 | } | |
930 | ||
931 | /** | |
932 | * fcoe_cpu_callback() - fcoe cpu hotplug event callback | |
933 | * @nfb: callback data block | |
934 | * @action: event triggering the callback | |
935 | * @hcpu: index for the cpu of this event | |
936 | * | |
937 | * This creates or destroys per cpu data for fcoe | |
938 | * | |
939 | * Returns NOTIFY_OK always. | |
940 | */ | |
941 | static int fcoe_cpu_callback(struct notifier_block *nfb, | |
942 | unsigned long action, void *hcpu) | |
943 | { | |
944 | unsigned cpu = (unsigned long)hcpu; | |
945 | ||
946 | switch (action) { | |
947 | case CPU_ONLINE: | |
948 | case CPU_ONLINE_FROZEN: | |
d5488eb9 | 949 | FCOE_DBG("CPU %x online: Create Rx thread\n", cpu); |
8976f424 RL |
950 | fcoe_percpu_thread_create(cpu); |
951 | break; | |
952 | case CPU_DEAD: | |
953 | case CPU_DEAD_FROZEN: | |
d5488eb9 | 954 | FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu); |
8976f424 RL |
955 | fcoe_percpu_thread_destroy(cpu); |
956 | break; | |
957 | default: | |
958 | break; | |
959 | } | |
960 | return NOTIFY_OK; | |
961 | } | |
962 | ||
963 | static struct notifier_block fcoe_cpu_notifier = { | |
964 | .notifier_call = fcoe_cpu_callback, | |
965 | }; | |
966 | ||
85b4aa49 | 967 | /** |
34f42a07 | 968 | * fcoe_rcv() - this is the fcoe receive function called by NET_RX_SOFTIRQ |
85b4aa49 RL |
969 | * @skb: the receive skb |
970 | * @dev: associated net device | |
971 | * @ptype: context | |
dd3fd72e | 972 | * @olddev: last device |
85b4aa49 RL |
973 | * |
974 | * this function will receive the packet and build fc frame and pass it up | |
975 | * | |
976 | * Returns: 0 for success | |
34f42a07 | 977 | */ |
85b4aa49 RL |
978 | int fcoe_rcv(struct sk_buff *skb, struct net_device *dev, |
979 | struct packet_type *ptype, struct net_device *olddev) | |
980 | { | |
981 | struct fc_lport *lp; | |
982 | struct fcoe_rcv_info *fr; | |
259ad85d | 983 | struct fcoe_interface *fcoe; |
85b4aa49 | 984 | struct fc_frame_header *fh; |
85b4aa49 | 985 | struct fcoe_percpu_s *fps; |
b2f0091f | 986 | unsigned int cpu; |
85b4aa49 | 987 | |
259ad85d | 988 | fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); |
3fe9a0ba | 989 | lp = fcoe->ctlr.lp; |
85b4aa49 | 990 | if (unlikely(lp == NULL)) { |
d5488eb9 | 991 | FCOE_NETDEV_DBG(dev, "Cannot find hba structure"); |
85b4aa49 RL |
992 | goto err2; |
993 | } | |
97c8389d JE |
994 | if (!lp->link_up) |
995 | goto err2; | |
85b4aa49 | 996 | |
d5488eb9 RL |
997 | FCOE_NETDEV_DBG(dev, "skb_info: len:%d data_len:%d head:%p " |
998 | "data:%p tail:%p end:%p sum:%d dev:%s", | |
999 | skb->len, skb->data_len, skb->head, skb->data, | |
1000 | skb_tail_pointer(skb), skb_end_pointer(skb), | |
1001 | skb->csum, skb->dev ? skb->dev->name : "<NULL>"); | |
85b4aa49 RL |
1002 | |
1003 | /* check for FCOE packet type */ | |
1004 | if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) { | |
d5488eb9 | 1005 | FCOE_NETDEV_DBG(dev, "Wrong FC type frame"); |
85b4aa49 RL |
1006 | goto err; |
1007 | } | |
1008 | ||
1009 | /* | |
1010 | * Check for minimum frame length, and make sure required FCoE | |
1011 | * and FC headers are pulled into the linear data area. | |
1012 | */ | |
1013 | if (unlikely((skb->len < FCOE_MIN_FRAME) || | |
1014 | !pskb_may_pull(skb, FCOE_HEADER_LEN))) | |
1015 | goto err; | |
1016 | ||
1017 | skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); | |
1018 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1019 | ||
85b4aa49 RL |
1020 | fr = fcoe_dev_from_skb(skb); |
1021 | fr->fr_dev = lp; | |
1022 | fr->ptype = ptype; | |
5e5e92df | 1023 | |
85b4aa49 | 1024 | /* |
b2f0091f VD |
1025 | * In case the incoming frame's exchange is originated from |
1026 | * the initiator, then received frame's exchange id is ANDed | |
1027 | * with fc_cpu_mask bits to get the same cpu on which exchange | |
1028 | * was originated, otherwise just use the current cpu. | |
85b4aa49 | 1029 | */ |
b2f0091f VD |
1030 | if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) |
1031 | cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; | |
1032 | else | |
1033 | cpu = smp_processor_id(); | |
5e5e92df | 1034 | |
8976f424 | 1035 | fps = &per_cpu(fcoe_percpu, cpu); |
85b4aa49 | 1036 | spin_lock_bh(&fps->fcoe_rx_list.lock); |
8976f424 RL |
1037 | if (unlikely(!fps->thread)) { |
1038 | /* | |
1039 | * The targeted CPU is not ready, let's target | |
1040 | * the first CPU now. For non-SMP systems this | |
1041 | * will check the same CPU twice. | |
1042 | */ | |
d5488eb9 RL |
1043 | FCOE_NETDEV_DBG(dev, "CPU is online, but no receive thread " |
1044 | "ready for incoming skb- using first online " | |
1045 | "CPU.\n"); | |
8976f424 RL |
1046 | |
1047 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1048 | cpu = first_cpu(cpu_online_map); | |
1049 | fps = &per_cpu(fcoe_percpu, cpu); | |
1050 | spin_lock_bh(&fps->fcoe_rx_list.lock); | |
1051 | if (!fps->thread) { | |
1052 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1053 | goto err; | |
1054 | } | |
1055 | } | |
1056 | ||
1057 | /* | |
1058 | * We now have a valid CPU that we're targeting for | |
1059 | * this skb. We also have this receive thread locked, | |
1060 | * so we're free to queue skbs into it's queue. | |
1061 | */ | |
85b4aa49 RL |
1062 | __skb_queue_tail(&fps->fcoe_rx_list, skb); |
1063 | if (fps->fcoe_rx_list.qlen == 1) | |
1064 | wake_up_process(fps->thread); | |
1065 | ||
1066 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1067 | ||
1068 | return 0; | |
1069 | err: | |
582b45bc | 1070 | fc_lport_get_stats(lp)->ErrorFrames++; |
85b4aa49 RL |
1071 | |
1072 | err2: | |
1073 | kfree_skb(skb); | |
1074 | return -1; | |
1075 | } | |
85b4aa49 RL |
1076 | |
1077 | /** | |
34f42a07 | 1078 | * fcoe_start_io() - pass to netdev to start xmit for fcoe |
85b4aa49 RL |
1079 | * @skb: the skb to be xmitted |
1080 | * | |
1081 | * Returns: 0 for success | |
34f42a07 | 1082 | */ |
85b4aa49 RL |
1083 | static inline int fcoe_start_io(struct sk_buff *skb) |
1084 | { | |
1085 | int rc; | |
1086 | ||
1087 | skb_get(skb); | |
1088 | rc = dev_queue_xmit(skb); | |
1089 | if (rc != 0) | |
1090 | return rc; | |
1091 | kfree_skb(skb); | |
1092 | return 0; | |
1093 | } | |
1094 | ||
1095 | /** | |
dd3fd72e | 1096 | * fcoe_get_paged_crc_eof() - in case we need to alloc a page for crc_eof |
85b4aa49 RL |
1097 | * @skb: the skb to be xmitted |
1098 | * @tlen: total len | |
1099 | * | |
1100 | * Returns: 0 for success | |
34f42a07 | 1101 | */ |
85b4aa49 RL |
1102 | static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen) |
1103 | { | |
1104 | struct fcoe_percpu_s *fps; | |
1105 | struct page *page; | |
85b4aa49 | 1106 | |
5e5e92df | 1107 | fps = &get_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1108 | page = fps->crc_eof_page; |
1109 | if (!page) { | |
1110 | page = alloc_page(GFP_ATOMIC); | |
1111 | if (!page) { | |
5e5e92df | 1112 | put_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1113 | return -ENOMEM; |
1114 | } | |
1115 | fps->crc_eof_page = page; | |
8976f424 | 1116 | fps->crc_eof_offset = 0; |
85b4aa49 RL |
1117 | } |
1118 | ||
1119 | get_page(page); | |
1120 | skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page, | |
1121 | fps->crc_eof_offset, tlen); | |
1122 | skb->len += tlen; | |
1123 | skb->data_len += tlen; | |
1124 | skb->truesize += tlen; | |
1125 | fps->crc_eof_offset += sizeof(struct fcoe_crc_eof); | |
1126 | ||
1127 | if (fps->crc_eof_offset >= PAGE_SIZE) { | |
1128 | fps->crc_eof_page = NULL; | |
1129 | fps->crc_eof_offset = 0; | |
1130 | put_page(page); | |
1131 | } | |
5e5e92df | 1132 | put_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1133 | return 0; |
1134 | } | |
1135 | ||
1136 | /** | |
34f42a07 | 1137 | * fcoe_fc_crc() - calculates FC CRC in this fcoe skb |
dd3fd72e | 1138 | * @fp: the fc_frame containing data to be checksummed |
85b4aa49 | 1139 | * |
014f5c3f | 1140 | * This uses crc32() to calculate the crc for port frame |
85b4aa49 | 1141 | * Return : 32 bit crc |
34f42a07 | 1142 | */ |
85b4aa49 RL |
1143 | u32 fcoe_fc_crc(struct fc_frame *fp) |
1144 | { | |
1145 | struct sk_buff *skb = fp_skb(fp); | |
1146 | struct skb_frag_struct *frag; | |
1147 | unsigned char *data; | |
1148 | unsigned long off, len, clen; | |
1149 | u32 crc; | |
1150 | unsigned i; | |
1151 | ||
1152 | crc = crc32(~0, skb->data, skb_headlen(skb)); | |
1153 | ||
1154 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1155 | frag = &skb_shinfo(skb)->frags[i]; | |
1156 | off = frag->page_offset; | |
1157 | len = frag->size; | |
1158 | while (len > 0) { | |
1159 | clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK)); | |
1160 | data = kmap_atomic(frag->page + (off >> PAGE_SHIFT), | |
1161 | KM_SKB_DATA_SOFTIRQ); | |
1162 | crc = crc32(crc, data + (off & ~PAGE_MASK), clen); | |
1163 | kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ); | |
1164 | off += clen; | |
1165 | len -= clen; | |
1166 | } | |
1167 | } | |
1168 | return crc; | |
1169 | } | |
85b4aa49 RL |
1170 | |
1171 | /** | |
34f42a07 | 1172 | * fcoe_xmit() - FCoE frame transmit function |
014f5c3f | 1173 | * @lp: the associated local fcoe |
85b4aa49 RL |
1174 | * @fp: the fc_frame to be transmitted |
1175 | * | |
1176 | * Return : 0 for success | |
34f42a07 | 1177 | */ |
85b4aa49 RL |
1178 | int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp) |
1179 | { | |
4bb6b515 | 1180 | int wlen; |
85b4aa49 RL |
1181 | u32 crc; |
1182 | struct ethhdr *eh; | |
1183 | struct fcoe_crc_eof *cp; | |
1184 | struct sk_buff *skb; | |
1185 | struct fcoe_dev_stats *stats; | |
1186 | struct fc_frame_header *fh; | |
1187 | unsigned int hlen; /* header length implies the version */ | |
1188 | unsigned int tlen; /* trailer length */ | |
1189 | unsigned int elen; /* eth header, may include vlan */ | |
3fe9a0ba CL |
1190 | struct fcoe_port *port = lport_priv(lp); |
1191 | struct fcoe_interface *fcoe = port->fcoe; | |
85b4aa49 RL |
1192 | u8 sof, eof; |
1193 | struct fcoe_hdr *hp; | |
1194 | ||
1195 | WARN_ON((fr_len(fp) % sizeof(u32)) != 0); | |
1196 | ||
85b4aa49 | 1197 | fh = fc_frame_header_get(fp); |
97c8389d JE |
1198 | skb = fp_skb(fp); |
1199 | wlen = skb->len / FCOE_WORD_TO_BYTE; | |
1200 | ||
1201 | if (!lp->link_up) { | |
3caf02ee | 1202 | kfree_skb(skb); |
97c8389d | 1203 | return 0; |
85b4aa49 RL |
1204 | } |
1205 | ||
97c8389d | 1206 | if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) && |
3fe9a0ba | 1207 | fcoe_ctlr_els_send(&fcoe->ctlr, skb)) |
97c8389d JE |
1208 | return 0; |
1209 | ||
85b4aa49 RL |
1210 | sof = fr_sof(fp); |
1211 | eof = fr_eof(fp); | |
1212 | ||
4e57e1cb | 1213 | elen = sizeof(struct ethhdr); |
85b4aa49 RL |
1214 | hlen = sizeof(struct fcoe_hdr); |
1215 | tlen = sizeof(struct fcoe_crc_eof); | |
1216 | wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; | |
1217 | ||
1218 | /* crc offload */ | |
1219 | if (likely(lp->crc_offload)) { | |
39ca9a06 | 1220 | skb->ip_summed = CHECKSUM_PARTIAL; |
85b4aa49 RL |
1221 | skb->csum_start = skb_headroom(skb); |
1222 | skb->csum_offset = skb->len; | |
1223 | crc = 0; | |
1224 | } else { | |
1225 | skb->ip_summed = CHECKSUM_NONE; | |
1226 | crc = fcoe_fc_crc(fp); | |
1227 | } | |
1228 | ||
014f5c3f | 1229 | /* copy port crc and eof to the skb buff */ |
85b4aa49 RL |
1230 | if (skb_is_nonlinear(skb)) { |
1231 | skb_frag_t *frag; | |
1232 | if (fcoe_get_paged_crc_eof(skb, tlen)) { | |
e9041581 | 1233 | kfree_skb(skb); |
85b4aa49 RL |
1234 | return -ENOMEM; |
1235 | } | |
1236 | frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; | |
1237 | cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ) | |
1238 | + frag->page_offset; | |
1239 | } else { | |
1240 | cp = (struct fcoe_crc_eof *)skb_put(skb, tlen); | |
1241 | } | |
1242 | ||
1243 | memset(cp, 0, sizeof(*cp)); | |
1244 | cp->fcoe_eof = eof; | |
1245 | cp->fcoe_crc32 = cpu_to_le32(~crc); | |
1246 | ||
1247 | if (skb_is_nonlinear(skb)) { | |
1248 | kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ); | |
1249 | cp = NULL; | |
1250 | } | |
1251 | ||
014f5c3f | 1252 | /* adjust skb network/transport offsets to match mac/fcoe/port */ |
85b4aa49 RL |
1253 | skb_push(skb, elen + hlen); |
1254 | skb_reset_mac_header(skb); | |
1255 | skb_reset_network_header(skb); | |
1256 | skb->mac_len = elen; | |
211c738d | 1257 | skb->protocol = htons(ETH_P_FCOE); |
3fe9a0ba | 1258 | skb->dev = fcoe->netdev; |
85b4aa49 RL |
1259 | |
1260 | /* fill up mac and fcoe headers */ | |
1261 | eh = eth_hdr(skb); | |
1262 | eh->h_proto = htons(ETH_P_FCOE); | |
3fe9a0ba | 1263 | if (fcoe->ctlr.map_dest) |
85b4aa49 RL |
1264 | fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id); |
1265 | else | |
1266 | /* insert GW address */ | |
3fe9a0ba | 1267 | memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN); |
85b4aa49 | 1268 | |
3fe9a0ba CL |
1269 | if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN)) |
1270 | memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN); | |
85b4aa49 | 1271 | else |
3fe9a0ba | 1272 | memcpy(eh->h_source, fcoe->ctlr.data_src_addr, ETH_ALEN); |
85b4aa49 RL |
1273 | |
1274 | hp = (struct fcoe_hdr *)(eh + 1); | |
1275 | memset(hp, 0, sizeof(*hp)); | |
1276 | if (FC_FCOE_VER) | |
1277 | FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); | |
1278 | hp->fcoe_sof = sof; | |
1279 | ||
39ca9a06 YZ |
1280 | /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ |
1281 | if (lp->seq_offload && fr_max_payload(fp)) { | |
1282 | skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; | |
1283 | skb_shinfo(skb)->gso_size = fr_max_payload(fp); | |
1284 | } else { | |
1285 | skb_shinfo(skb)->gso_type = 0; | |
1286 | skb_shinfo(skb)->gso_size = 0; | |
1287 | } | |
85b4aa49 | 1288 | /* update tx stats: regardless if LLD fails */ |
582b45bc RL |
1289 | stats = fc_lport_get_stats(lp); |
1290 | stats->TxFrames++; | |
1291 | stats->TxWords += wlen; | |
85b4aa49 RL |
1292 | |
1293 | /* send down to lld */ | |
1294 | fr_dev(fp) = lp; | |
014f5c3f | 1295 | if (port->fcoe_pending_queue.qlen) |
4bb6b515 VD |
1296 | fcoe_check_wait_queue(lp, skb); |
1297 | else if (fcoe_start_io(skb)) | |
1298 | fcoe_check_wait_queue(lp, skb); | |
85b4aa49 RL |
1299 | |
1300 | return 0; | |
1301 | } | |
85b4aa49 | 1302 | |
34f42a07 RL |
1303 | /** |
1304 | * fcoe_percpu_receive_thread() - recv thread per cpu | |
85b4aa49 RL |
1305 | * @arg: ptr to the fcoe per cpu struct |
1306 | * | |
1307 | * Return: 0 for success | |
85b4aa49 RL |
1308 | */ |
1309 | int fcoe_percpu_receive_thread(void *arg) | |
1310 | { | |
1311 | struct fcoe_percpu_s *p = arg; | |
1312 | u32 fr_len; | |
1313 | struct fc_lport *lp; | |
1314 | struct fcoe_rcv_info *fr; | |
1315 | struct fcoe_dev_stats *stats; | |
1316 | struct fc_frame_header *fh; | |
1317 | struct sk_buff *skb; | |
1318 | struct fcoe_crc_eof crc_eof; | |
1319 | struct fc_frame *fp; | |
1320 | u8 *mac = NULL; | |
014f5c3f | 1321 | struct fcoe_port *port; |
85b4aa49 RL |
1322 | struct fcoe_hdr *hp; |
1323 | ||
4469c195 | 1324 | set_user_nice(current, -20); |
85b4aa49 RL |
1325 | |
1326 | while (!kthread_should_stop()) { | |
1327 | ||
1328 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1329 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) { | |
1330 | set_current_state(TASK_INTERRUPTIBLE); | |
1331 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1332 | schedule(); | |
1333 | set_current_state(TASK_RUNNING); | |
1334 | if (kthread_should_stop()) | |
1335 | return 0; | |
1336 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1337 | } | |
1338 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1339 | fr = fcoe_dev_from_skb(skb); | |
1340 | lp = fr->fr_dev; | |
1341 | if (unlikely(lp == NULL)) { | |
d5488eb9 | 1342 | FCOE_NETDEV_DBG(skb->dev, "Invalid HBA Structure"); |
85b4aa49 RL |
1343 | kfree_skb(skb); |
1344 | continue; | |
1345 | } | |
1346 | ||
d5488eb9 RL |
1347 | FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d " |
1348 | "head:%p data:%p tail:%p end:%p sum:%d dev:%s", | |
1349 | skb->len, skb->data_len, | |
1350 | skb->head, skb->data, skb_tail_pointer(skb), | |
1351 | skb_end_pointer(skb), skb->csum, | |
1352 | skb->dev ? skb->dev->name : "<NULL>"); | |
85b4aa49 RL |
1353 | |
1354 | /* | |
1355 | * Save source MAC address before discarding header. | |
1356 | */ | |
014f5c3f | 1357 | port = lport_priv(lp); |
85b4aa49 RL |
1358 | if (skb_is_nonlinear(skb)) |
1359 | skb_linearize(skb); /* not ideal */ | |
97c8389d | 1360 | mac = eth_hdr(skb)->h_source; |
85b4aa49 RL |
1361 | |
1362 | /* | |
1363 | * Frame length checks and setting up the header pointers | |
1364 | * was done in fcoe_rcv already. | |
1365 | */ | |
1366 | hp = (struct fcoe_hdr *) skb_network_header(skb); | |
1367 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1368 | ||
582b45bc | 1369 | stats = fc_lport_get_stats(lp); |
85b4aa49 | 1370 | if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { |
582b45bc | 1371 | if (stats->ErrorFrames < 5) |
d5488eb9 | 1372 | printk(KERN_WARNING "fcoe: FCoE version " |
582b45bc RL |
1373 | "mismatch: The frame has " |
1374 | "version %x, but the " | |
1375 | "initiator supports version " | |
1376 | "%x\n", FC_FCOE_DECAPS_VER(hp), | |
1377 | FC_FCOE_VER); | |
1378 | stats->ErrorFrames++; | |
85b4aa49 RL |
1379 | kfree_skb(skb); |
1380 | continue; | |
1381 | } | |
1382 | ||
1383 | skb_pull(skb, sizeof(struct fcoe_hdr)); | |
1384 | fr_len = skb->len - sizeof(struct fcoe_crc_eof); | |
1385 | ||
582b45bc RL |
1386 | stats->RxFrames++; |
1387 | stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; | |
85b4aa49 RL |
1388 | |
1389 | fp = (struct fc_frame *)skb; | |
1390 | fc_frame_init(fp); | |
1391 | fr_dev(fp) = lp; | |
1392 | fr_sof(fp) = hp->fcoe_sof; | |
1393 | ||
1394 | /* Copy out the CRC and EOF trailer for access */ | |
1395 | if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) { | |
1396 | kfree_skb(skb); | |
1397 | continue; | |
1398 | } | |
1399 | fr_eof(fp) = crc_eof.fcoe_eof; | |
1400 | fr_crc(fp) = crc_eof.fcoe_crc32; | |
1401 | if (pskb_trim(skb, fr_len)) { | |
1402 | kfree_skb(skb); | |
1403 | continue; | |
1404 | } | |
1405 | ||
1406 | /* | |
1407 | * We only check CRC if no offload is available and if it is | |
1408 | * it's solicited data, in which case, the FCP layer would | |
1409 | * check it during the copy. | |
1410 | */ | |
07c00ec4 | 1411 | if (lp->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY) |
85b4aa49 RL |
1412 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; |
1413 | else | |
1414 | fr_flags(fp) |= FCPHF_CRC_UNCHECKED; | |
1415 | ||
1416 | fh = fc_frame_header_get(fp); | |
1417 | if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && | |
1418 | fh->fh_type == FC_TYPE_FCP) { | |
52ff878c | 1419 | fc_exch_recv(lp, fp); |
85b4aa49 RL |
1420 | continue; |
1421 | } | |
1422 | if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) { | |
1423 | if (le32_to_cpu(fr_crc(fp)) != | |
1424 | ~crc32(~0, skb->data, fr_len)) { | |
d5488eb9 | 1425 | if (stats->InvalidCRCCount < 5) |
85b4aa49 RL |
1426 | printk(KERN_WARNING "fcoe: dropping " |
1427 | "frame with CRC error\n"); | |
1428 | stats->InvalidCRCCount++; | |
1429 | stats->ErrorFrames++; | |
1430 | fc_frame_free(fp); | |
1431 | continue; | |
1432 | } | |
1433 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; | |
1434 | } | |
3fe9a0ba CL |
1435 | if (unlikely(port->fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN) && |
1436 | fcoe_ctlr_recv_flogi(&port->fcoe->ctlr, fp, mac)) { | |
97c8389d JE |
1437 | fc_frame_free(fp); |
1438 | continue; | |
1439 | } | |
52ff878c | 1440 | fc_exch_recv(lp, fp); |
85b4aa49 RL |
1441 | } |
1442 | return 0; | |
1443 | } | |
1444 | ||
85b4aa49 | 1445 | /** |
dd3fd72e CL |
1446 | * fcoe_check_wait_queue() - attempt to clear the transmit backlog |
1447 | * @lp: the fc_lport | |
85b4aa49 RL |
1448 | * |
1449 | * This empties the wait_queue, dequeue the head of the wait_queue queue | |
1450 | * and calls fcoe_start_io() for each packet, if all skb have been | |
c826a314 | 1451 | * transmitted, return qlen or -1 if a error occurs, then restore |
dd3fd72e | 1452 | * wait_queue and try again later. |
85b4aa49 RL |
1453 | * |
1454 | * The wait_queue is used when the skb transmit fails. skb will go | |
dd3fd72e | 1455 | * in the wait_queue which will be emptied by the timer function or |
85b4aa49 | 1456 | * by the next skb transmit. |
34f42a07 | 1457 | */ |
4bb6b515 | 1458 | static void fcoe_check_wait_queue(struct fc_lport *lp, struct sk_buff *skb) |
85b4aa49 | 1459 | { |
014f5c3f | 1460 | struct fcoe_port *port = lport_priv(lp); |
4bb6b515 | 1461 | int rc; |
85b4aa49 | 1462 | |
014f5c3f | 1463 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
4bb6b515 VD |
1464 | |
1465 | if (skb) | |
014f5c3f | 1466 | __skb_queue_tail(&port->fcoe_pending_queue, skb); |
4bb6b515 | 1467 | |
014f5c3f | 1468 | if (port->fcoe_pending_queue_active) |
c826a314 | 1469 | goto out; |
014f5c3f | 1470 | port->fcoe_pending_queue_active = 1; |
55c8bafb | 1471 | |
014f5c3f | 1472 | while (port->fcoe_pending_queue.qlen) { |
55c8bafb | 1473 | /* keep qlen > 0 until fcoe_start_io succeeds */ |
014f5c3f CL |
1474 | port->fcoe_pending_queue.qlen++; |
1475 | skb = __skb_dequeue(&port->fcoe_pending_queue); | |
55c8bafb | 1476 | |
014f5c3f | 1477 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
55c8bafb | 1478 | rc = fcoe_start_io(skb); |
014f5c3f | 1479 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
55c8bafb CL |
1480 | |
1481 | if (rc) { | |
014f5c3f | 1482 | __skb_queue_head(&port->fcoe_pending_queue, skb); |
55c8bafb | 1483 | /* undo temporary increment above */ |
014f5c3f | 1484 | port->fcoe_pending_queue.qlen--; |
55c8bafb | 1485 | break; |
85b4aa49 | 1486 | } |
55c8bafb | 1487 | /* undo temporary increment above */ |
014f5c3f | 1488 | port->fcoe_pending_queue.qlen--; |
85b4aa49 | 1489 | } |
55c8bafb | 1490 | |
014f5c3f | 1491 | if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH) |
55c8bafb | 1492 | lp->qfull = 0; |
014f5c3f CL |
1493 | if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer)) |
1494 | mod_timer(&port->timer, jiffies + 2); | |
1495 | port->fcoe_pending_queue_active = 0; | |
c826a314 | 1496 | out: |
014f5c3f | 1497 | if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH) |
4bb6b515 | 1498 | lp->qfull = 1; |
014f5c3f | 1499 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
4bb6b515 | 1500 | return; |
85b4aa49 RL |
1501 | } |
1502 | ||
85b4aa49 | 1503 | /** |
34f42a07 RL |
1504 | * fcoe_dev_setup() - setup link change notification interface |
1505 | */ | |
b0d428ad | 1506 | static void fcoe_dev_setup(void) |
85b4aa49 | 1507 | { |
85b4aa49 RL |
1508 | register_netdevice_notifier(&fcoe_notifier); |
1509 | } | |
1510 | ||
1511 | /** | |
b0d428ad | 1512 | * fcoe_dev_cleanup() - cleanup link change notification interface |
34f42a07 | 1513 | */ |
85b4aa49 RL |
1514 | static void fcoe_dev_cleanup(void) |
1515 | { | |
1516 | unregister_netdevice_notifier(&fcoe_notifier); | |
1517 | } | |
1518 | ||
1519 | /** | |
34f42a07 | 1520 | * fcoe_device_notification() - netdev event notification callback |
85b4aa49 RL |
1521 | * @notifier: context of the notification |
1522 | * @event: type of event | |
1523 | * @ptr: fixed array for output parsed ifname | |
1524 | * | |
1525 | * This function is called by the ethernet driver in case of link change event | |
1526 | * | |
1527 | * Returns: 0 for success | |
34f42a07 | 1528 | */ |
85b4aa49 RL |
1529 | static int fcoe_device_notification(struct notifier_block *notifier, |
1530 | ulong event, void *ptr) | |
1531 | { | |
1532 | struct fc_lport *lp = NULL; | |
1d1b88dc | 1533 | struct net_device *netdev = ptr; |
014f5c3f | 1534 | struct fcoe_interface *fcoe; |
85b4aa49 | 1535 | struct fcoe_dev_stats *stats; |
97c8389d | 1536 | u32 link_possible = 1; |
85b4aa49 RL |
1537 | u32 mfs; |
1538 | int rc = NOTIFY_OK; | |
1539 | ||
1540 | read_lock(&fcoe_hostlist_lock); | |
014f5c3f | 1541 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
25024989 | 1542 | if (fcoe->netdev == netdev) { |
3fe9a0ba | 1543 | lp = fcoe->ctlr.lp; |
85b4aa49 RL |
1544 | break; |
1545 | } | |
1546 | } | |
1547 | read_unlock(&fcoe_hostlist_lock); | |
1548 | if (lp == NULL) { | |
1549 | rc = NOTIFY_DONE; | |
1550 | goto out; | |
1551 | } | |
1552 | ||
85b4aa49 RL |
1553 | switch (event) { |
1554 | case NETDEV_DOWN: | |
1555 | case NETDEV_GOING_DOWN: | |
97c8389d | 1556 | link_possible = 0; |
85b4aa49 RL |
1557 | break; |
1558 | case NETDEV_UP: | |
1559 | case NETDEV_CHANGE: | |
85b4aa49 RL |
1560 | break; |
1561 | case NETDEV_CHANGEMTU: | |
1d1b88dc VD |
1562 | mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + |
1563 | sizeof(struct fcoe_crc_eof)); | |
85b4aa49 RL |
1564 | if (mfs >= FC_MIN_MAX_FRAME) |
1565 | fc_set_mfs(lp, mfs); | |
85b4aa49 RL |
1566 | break; |
1567 | case NETDEV_REGISTER: | |
1568 | break; | |
1569 | default: | |
1d1b88dc | 1570 | FCOE_NETDEV_DBG(netdev, "Unknown event %ld " |
d5488eb9 | 1571 | "from netdev netlink\n", event); |
85b4aa49 | 1572 | } |
97c8389d | 1573 | if (link_possible && !fcoe_link_ok(lp)) |
3fe9a0ba CL |
1574 | fcoe_ctlr_link_up(&fcoe->ctlr); |
1575 | else if (fcoe_ctlr_link_down(&fcoe->ctlr)) { | |
97c8389d JE |
1576 | stats = fc_lport_get_stats(lp); |
1577 | stats->LinkFailureCount++; | |
1578 | fcoe_clean_pending_queue(lp); | |
85b4aa49 RL |
1579 | } |
1580 | out: | |
1581 | return rc; | |
1582 | } | |
1583 | ||
1584 | /** | |
34f42a07 | 1585 | * fcoe_if_to_netdev() - parse a name buffer to get netdev |
85b4aa49 RL |
1586 | * @buffer: incoming buffer to be copied |
1587 | * | |
dd3fd72e | 1588 | * Returns: NULL or ptr to net_device |
34f42a07 | 1589 | */ |
85b4aa49 RL |
1590 | static struct net_device *fcoe_if_to_netdev(const char *buffer) |
1591 | { | |
1592 | char *cp; | |
1593 | char ifname[IFNAMSIZ + 2]; | |
1594 | ||
1595 | if (buffer) { | |
1596 | strlcpy(ifname, buffer, IFNAMSIZ); | |
1597 | cp = ifname + strlen(ifname); | |
1598 | while (--cp >= ifname && *cp == '\n') | |
1599 | *cp = '\0'; | |
1600 | return dev_get_by_name(&init_net, ifname); | |
1601 | } | |
1602 | return NULL; | |
1603 | } | |
1604 | ||
1605 | /** | |
dd3fd72e | 1606 | * fcoe_netdev_to_module_owner() - finds out the driver module of the netdev |
85b4aa49 RL |
1607 | * @netdev: the target netdev |
1608 | * | |
1609 | * Returns: ptr to the struct module, NULL for failure | |
34f42a07 | 1610 | */ |
b2ab99c9 RL |
1611 | static struct module * |
1612 | fcoe_netdev_to_module_owner(const struct net_device *netdev) | |
85b4aa49 RL |
1613 | { |
1614 | struct device *dev; | |
1615 | ||
1616 | if (!netdev) | |
1617 | return NULL; | |
1618 | ||
1619 | dev = netdev->dev.parent; | |
1620 | if (!dev) | |
1621 | return NULL; | |
1622 | ||
1623 | if (!dev->driver) | |
1624 | return NULL; | |
1625 | ||
1626 | return dev->driver->owner; | |
1627 | } | |
1628 | ||
1629 | /** | |
34f42a07 | 1630 | * fcoe_ethdrv_get() - Hold the Ethernet driver |
85b4aa49 RL |
1631 | * @netdev: the target netdev |
1632 | * | |
34f42a07 RL |
1633 | * Holds the Ethernet driver module by try_module_get() for |
1634 | * the corresponding netdev. | |
1635 | * | |
dd3fd72e | 1636 | * Returns: 0 for success |
34f42a07 | 1637 | */ |
85b4aa49 RL |
1638 | static int fcoe_ethdrv_get(const struct net_device *netdev) |
1639 | { | |
1640 | struct module *owner; | |
1641 | ||
1642 | owner = fcoe_netdev_to_module_owner(netdev); | |
1643 | if (owner) { | |
d5488eb9 RL |
1644 | FCOE_NETDEV_DBG(netdev, "Hold driver module %s\n", |
1645 | module_name(owner)); | |
85b4aa49 RL |
1646 | return try_module_get(owner); |
1647 | } | |
1648 | return -ENODEV; | |
1649 | } | |
1650 | ||
1651 | /** | |
34f42a07 | 1652 | * fcoe_ethdrv_put() - Release the Ethernet driver |
85b4aa49 RL |
1653 | * @netdev: the target netdev |
1654 | * | |
34f42a07 RL |
1655 | * Releases the Ethernet driver module by module_put for |
1656 | * the corresponding netdev. | |
1657 | * | |
dd3fd72e | 1658 | * Returns: 0 for success |
34f42a07 | 1659 | */ |
85b4aa49 RL |
1660 | static int fcoe_ethdrv_put(const struct net_device *netdev) |
1661 | { | |
1662 | struct module *owner; | |
1663 | ||
1664 | owner = fcoe_netdev_to_module_owner(netdev); | |
1665 | if (owner) { | |
d5488eb9 RL |
1666 | FCOE_NETDEV_DBG(netdev, "Release driver module %s\n", |
1667 | module_name(owner)); | |
85b4aa49 RL |
1668 | module_put(owner); |
1669 | return 0; | |
1670 | } | |
1671 | return -ENODEV; | |
1672 | } | |
1673 | ||
1674 | /** | |
34f42a07 | 1675 | * fcoe_destroy() - handles the destroy from sysfs |
dd3fd72e | 1676 | * @buffer: expected to be an eth if name |
85b4aa49 RL |
1677 | * @kp: associated kernel param |
1678 | * | |
1679 | * Returns: 0 for success | |
34f42a07 | 1680 | */ |
85b4aa49 RL |
1681 | static int fcoe_destroy(const char *buffer, struct kernel_param *kp) |
1682 | { | |
85b4aa49 | 1683 | struct net_device *netdev; |
030f4e00 CL |
1684 | struct fcoe_interface *fcoe; |
1685 | struct fcoe_port *port; | |
af7f85d9 CL |
1686 | struct fc_lport *lport; |
1687 | int rc; | |
85b4aa49 RL |
1688 | |
1689 | netdev = fcoe_if_to_netdev(buffer); | |
1690 | if (!netdev) { | |
1691 | rc = -ENODEV; | |
1692 | goto out_nodev; | |
1693 | } | |
1694 | /* look for existing lport */ | |
af7f85d9 CL |
1695 | lport = fcoe_hostlist_lookup(netdev); |
1696 | if (!lport) { | |
85b4aa49 RL |
1697 | rc = -ENODEV; |
1698 | goto out_putdev; | |
1699 | } | |
030f4e00 CL |
1700 | port = lport_priv(lport); |
1701 | fcoe = port->fcoe; | |
af7f85d9 | 1702 | fcoe_if_destroy(lport); |
85b4aa49 RL |
1703 | fcoe_ethdrv_put(netdev); |
1704 | rc = 0; | |
1705 | out_putdev: | |
1706 | dev_put(netdev); | |
1707 | out_nodev: | |
1708 | return rc; | |
1709 | } | |
1710 | ||
1711 | /** | |
34f42a07 | 1712 | * fcoe_create() - Handles the create call from sysfs |
dd3fd72e | 1713 | * @buffer: expected to be an eth if name |
85b4aa49 RL |
1714 | * @kp: associated kernel param |
1715 | * | |
1716 | * Returns: 0 for success | |
34f42a07 | 1717 | */ |
85b4aa49 RL |
1718 | static int fcoe_create(const char *buffer, struct kernel_param *kp) |
1719 | { | |
1720 | int rc; | |
030f4e00 | 1721 | struct fcoe_interface *fcoe; |
af7f85d9 | 1722 | struct fc_lport *lport; |
85b4aa49 RL |
1723 | struct net_device *netdev; |
1724 | ||
1725 | netdev = fcoe_if_to_netdev(buffer); | |
1726 | if (!netdev) { | |
1727 | rc = -ENODEV; | |
1728 | goto out_nodev; | |
1729 | } | |
1730 | /* look for existing lport */ | |
1731 | if (fcoe_hostlist_lookup(netdev)) { | |
1732 | rc = -EEXIST; | |
1733 | goto out_putdev; | |
1734 | } | |
1735 | fcoe_ethdrv_get(netdev); | |
1736 | ||
030f4e00 CL |
1737 | fcoe = fcoe_interface_create(netdev); |
1738 | if (!fcoe) { | |
1739 | rc = -ENOMEM; | |
1740 | goto out_putdev; | |
1741 | } | |
1742 | ||
1743 | lport = fcoe_if_create(fcoe, &netdev->dev); | |
af7f85d9 | 1744 | if (IS_ERR(lport)) { |
d5488eb9 | 1745 | printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", |
85b4aa49 RL |
1746 | netdev->name); |
1747 | fcoe_ethdrv_put(netdev); | |
1748 | rc = -EIO; | |
030f4e00 | 1749 | goto out_free; |
85b4aa49 | 1750 | } |
030f4e00 | 1751 | |
54b649f8 CL |
1752 | /* Make this the "master" N_Port */ |
1753 | fcoe->ctlr.lp = lport; | |
1754 | ||
1755 | /* start FIP Discovery and FLOGI */ | |
1756 | lport->boot_time = jiffies; | |
1757 | fc_fabric_login(lport); | |
1758 | if (!fcoe_link_ok(lport)) | |
1759 | fcoe_ctlr_link_up(&fcoe->ctlr); | |
030f4e00 | 1760 | |
54b649f8 | 1761 | rc = 0; |
030f4e00 | 1762 | out_free: |
54b649f8 CL |
1763 | /* |
1764 | * Release from init in fcoe_interface_create(), on success lport | |
1765 | * should be holding a reference taken in fcoe_if_create(). | |
1766 | */ | |
030f4e00 | 1767 | fcoe_interface_put(fcoe); |
85b4aa49 RL |
1768 | out_putdev: |
1769 | dev_put(netdev); | |
1770 | out_nodev: | |
1771 | return rc; | |
1772 | } | |
1773 | ||
1774 | module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR); | |
1775 | __MODULE_PARM_TYPE(create, "string"); | |
014f5c3f | 1776 | MODULE_PARM_DESC(create, "Create fcoe fcoe using net device passed in."); |
85b4aa49 RL |
1777 | module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR); |
1778 | __MODULE_PARM_TYPE(destroy, "string"); | |
014f5c3f | 1779 | MODULE_PARM_DESC(destroy, "Destroy fcoe fcoe"); |
85b4aa49 | 1780 | |
34f42a07 RL |
1781 | /** |
1782 | * fcoe_link_ok() - Check if link is ok for the fc_lport | |
85b4aa49 RL |
1783 | * @lp: ptr to the fc_lport |
1784 | * | |
1785 | * Any permanently-disqualifying conditions have been previously checked. | |
1786 | * This also updates the speed setting, which may change with link for 100/1000. | |
1787 | * | |
1788 | * This function should probably be checking for PAUSE support at some point | |
1789 | * in the future. Currently Per-priority-pause is not determinable using | |
1790 | * ethtool, so we shouldn't be restrictive until that problem is resolved. | |
1791 | * | |
1792 | * Returns: 0 if link is OK for use by FCoE. | |
1793 | * | |
1794 | */ | |
1795 | int fcoe_link_ok(struct fc_lport *lp) | |
1796 | { | |
014f5c3f | 1797 | struct fcoe_port *port = lport_priv(lp); |
25024989 | 1798 | struct net_device *dev = port->fcoe->netdev; |
85b4aa49 | 1799 | struct ethtool_cmd ecmd = { ETHTOOL_GSET }; |
85b4aa49 | 1800 | |
2f718d64 YZ |
1801 | if ((dev->flags & IFF_UP) && netif_carrier_ok(dev) && |
1802 | (!dev_ethtool_get_settings(dev, &ecmd))) { | |
1803 | lp->link_supported_speeds &= | |
1804 | ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT); | |
1805 | if (ecmd.supported & (SUPPORTED_1000baseT_Half | | |
1806 | SUPPORTED_1000baseT_Full)) | |
1807 | lp->link_supported_speeds |= FC_PORTSPEED_1GBIT; | |
1808 | if (ecmd.supported & SUPPORTED_10000baseT_Full) | |
1809 | lp->link_supported_speeds |= | |
1810 | FC_PORTSPEED_10GBIT; | |
1811 | if (ecmd.speed == SPEED_1000) | |
1812 | lp->link_speed = FC_PORTSPEED_1GBIT; | |
1813 | if (ecmd.speed == SPEED_10000) | |
1814 | lp->link_speed = FC_PORTSPEED_10GBIT; | |
85b4aa49 | 1815 | |
2f718d64 YZ |
1816 | return 0; |
1817 | } | |
1818 | return -1; | |
85b4aa49 | 1819 | } |
85b4aa49 | 1820 | |
34f42a07 RL |
1821 | /** |
1822 | * fcoe_percpu_clean() - Clear the pending skbs for an lport | |
85b4aa49 RL |
1823 | * @lp: the fc_lport |
1824 | */ | |
1825 | void fcoe_percpu_clean(struct fc_lport *lp) | |
1826 | { | |
85b4aa49 RL |
1827 | struct fcoe_percpu_s *pp; |
1828 | struct fcoe_rcv_info *fr; | |
1829 | struct sk_buff_head *list; | |
1830 | struct sk_buff *skb, *next; | |
1831 | struct sk_buff *head; | |
5e5e92df | 1832 | unsigned int cpu; |
85b4aa49 | 1833 | |
5e5e92df RL |
1834 | for_each_possible_cpu(cpu) { |
1835 | pp = &per_cpu(fcoe_percpu, cpu); | |
1836 | spin_lock_bh(&pp->fcoe_rx_list.lock); | |
1837 | list = &pp->fcoe_rx_list; | |
1838 | head = list->next; | |
1839 | for (skb = head; skb != (struct sk_buff *)list; | |
1840 | skb = next) { | |
1841 | next = skb->next; | |
1842 | fr = fcoe_dev_from_skb(skb); | |
1843 | if (fr->fr_dev == lp) { | |
1844 | __skb_unlink(skb, list); | |
1845 | kfree_skb(skb); | |
85b4aa49 | 1846 | } |
85b4aa49 | 1847 | } |
5e5e92df | 1848 | spin_unlock_bh(&pp->fcoe_rx_list.lock); |
85b4aa49 RL |
1849 | } |
1850 | } | |
85b4aa49 RL |
1851 | |
1852 | /** | |
34f42a07 | 1853 | * fcoe_clean_pending_queue() - Dequeue a skb and free it |
85b4aa49 RL |
1854 | * @lp: the corresponding fc_lport |
1855 | * | |
1856 | * Returns: none | |
34f42a07 | 1857 | */ |
85b4aa49 RL |
1858 | void fcoe_clean_pending_queue(struct fc_lport *lp) |
1859 | { | |
014f5c3f | 1860 | struct fcoe_port *port = lport_priv(lp); |
85b4aa49 RL |
1861 | struct sk_buff *skb; |
1862 | ||
014f5c3f CL |
1863 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
1864 | while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) { | |
1865 | spin_unlock_bh(&port->fcoe_pending_queue.lock); | |
85b4aa49 | 1866 | kfree_skb(skb); |
014f5c3f | 1867 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
85b4aa49 | 1868 | } |
014f5c3f | 1869 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
85b4aa49 | 1870 | } |
85b4aa49 | 1871 | |
34f42a07 RL |
1872 | /** |
1873 | * fcoe_reset() - Resets the fcoe | |
85b4aa49 RL |
1874 | * @shost: shost the reset is from |
1875 | * | |
1876 | * Returns: always 0 | |
1877 | */ | |
1878 | int fcoe_reset(struct Scsi_Host *shost) | |
1879 | { | |
1880 | struct fc_lport *lport = shost_priv(shost); | |
1881 | fc_lport_reset(lport); | |
1882 | return 0; | |
1883 | } | |
85b4aa49 | 1884 | |
34f42a07 | 1885 | /** |
014f5c3f | 1886 | * fcoe_hostlist_lookup_port() - find the corresponding lport by a given device |
dd3fd72e | 1887 | * @dev: this is currently ptr to net_device |
85b4aa49 | 1888 | * |
e8af4d43 VD |
1889 | * Called with fcoe_hostlist_lock held. |
1890 | * | |
014f5c3f | 1891 | * Returns: NULL or the located fcoe_port |
85b4aa49 | 1892 | */ |
014f5c3f CL |
1893 | static struct fcoe_interface * |
1894 | fcoe_hostlist_lookup_port(const struct net_device *dev) | |
85b4aa49 | 1895 | { |
014f5c3f | 1896 | struct fcoe_interface *fcoe; |
85b4aa49 | 1897 | |
014f5c3f | 1898 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
25024989 | 1899 | if (fcoe->netdev == dev) |
014f5c3f | 1900 | return fcoe; |
85b4aa49 | 1901 | } |
85b4aa49 RL |
1902 | return NULL; |
1903 | } | |
1904 | ||
34f42a07 RL |
1905 | /** |
1906 | * fcoe_hostlist_lookup() - Find the corresponding lport by netdev | |
85b4aa49 RL |
1907 | * @netdev: ptr to net_device |
1908 | * | |
1909 | * Returns: 0 for success | |
1910 | */ | |
1911 | struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) | |
1912 | { | |
014f5c3f | 1913 | struct fcoe_interface *fcoe; |
85b4aa49 | 1914 | |
e8af4d43 | 1915 | read_lock(&fcoe_hostlist_lock); |
014f5c3f | 1916 | fcoe = fcoe_hostlist_lookup_port(netdev); |
e8af4d43 | 1917 | read_unlock(&fcoe_hostlist_lock); |
85b4aa49 | 1918 | |
3fe9a0ba | 1919 | return (fcoe) ? fcoe->ctlr.lp : NULL; |
85b4aa49 | 1920 | } |
85b4aa49 | 1921 | |
34f42a07 RL |
1922 | /** |
1923 | * fcoe_hostlist_add() - Add a lport to lports list | |
dd3fd72e | 1924 | * @lp: ptr to the fc_lport to be added |
85b4aa49 | 1925 | * |
e8af4d43 VD |
1926 | * Called with write fcoe_hostlist_lock held. |
1927 | * | |
85b4aa49 RL |
1928 | * Returns: 0 for success |
1929 | */ | |
014f5c3f | 1930 | int fcoe_hostlist_add(const struct fc_lport *lport) |
85b4aa49 | 1931 | { |
014f5c3f CL |
1932 | struct fcoe_interface *fcoe; |
1933 | struct fcoe_port *port; | |
1934 | ||
1935 | fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); | |
1936 | if (!fcoe) { | |
1937 | port = lport_priv(lport); | |
1938 | fcoe = port->fcoe; | |
1939 | list_add_tail(&fcoe->list, &fcoe_hostlist); | |
85b4aa49 RL |
1940 | } |
1941 | return 0; | |
1942 | } | |
85b4aa49 | 1943 | |
34f42a07 RL |
1944 | /** |
1945 | * fcoe_hostlist_remove() - remove a lport from lports list | |
dd3fd72e | 1946 | * @lp: ptr to the fc_lport to be removed |
85b4aa49 RL |
1947 | * |
1948 | * Returns: 0 for success | |
1949 | */ | |
014f5c3f | 1950 | int fcoe_hostlist_remove(const struct fc_lport *lport) |
85b4aa49 | 1951 | { |
014f5c3f | 1952 | struct fcoe_interface *fcoe; |
85b4aa49 | 1953 | |
e8af4d43 | 1954 | write_lock_bh(&fcoe_hostlist_lock); |
014f5c3f CL |
1955 | fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); |
1956 | BUG_ON(!fcoe); | |
1957 | list_del(&fcoe->list); | |
85b4aa49 RL |
1958 | write_unlock_bh(&fcoe_hostlist_lock); |
1959 | ||
1960 | return 0; | |
1961 | } | |
85b4aa49 | 1962 | |
85b4aa49 | 1963 | /** |
34f42a07 | 1964 | * fcoe_init() - fcoe module loading initialization |
85b4aa49 | 1965 | * |
85b4aa49 | 1966 | * Returns 0 on success, negative on failure |
34f42a07 | 1967 | */ |
85b4aa49 RL |
1968 | static int __init fcoe_init(void) |
1969 | { | |
38eccabd | 1970 | unsigned int cpu; |
8976f424 | 1971 | int rc = 0; |
85b4aa49 RL |
1972 | struct fcoe_percpu_s *p; |
1973 | ||
38eccabd | 1974 | for_each_possible_cpu(cpu) { |
5e5e92df | 1975 | p = &per_cpu(fcoe_percpu, cpu); |
38eccabd RL |
1976 | skb_queue_head_init(&p->fcoe_rx_list); |
1977 | } | |
1978 | ||
8976f424 RL |
1979 | for_each_online_cpu(cpu) |
1980 | fcoe_percpu_thread_create(cpu); | |
85b4aa49 | 1981 | |
8976f424 RL |
1982 | /* Initialize per CPU interrupt thread */ |
1983 | rc = register_hotcpu_notifier(&fcoe_cpu_notifier); | |
1984 | if (rc) | |
1985 | goto out_free; | |
85b4aa49 | 1986 | |
8976f424 | 1987 | /* Setup link change notification */ |
85b4aa49 RL |
1988 | fcoe_dev_setup(); |
1989 | ||
5892c32f CL |
1990 | rc = fcoe_if_init(); |
1991 | if (rc) | |
1992 | goto out_free; | |
85b4aa49 RL |
1993 | |
1994 | return 0; | |
8976f424 RL |
1995 | |
1996 | out_free: | |
1997 | for_each_online_cpu(cpu) { | |
1998 | fcoe_percpu_thread_destroy(cpu); | |
1999 | } | |
2000 | ||
2001 | return rc; | |
85b4aa49 RL |
2002 | } |
2003 | module_init(fcoe_init); | |
2004 | ||
2005 | /** | |
34f42a07 | 2006 | * fcoe_exit() - fcoe module unloading cleanup |
85b4aa49 RL |
2007 | * |
2008 | * Returns 0 on success, negative on failure | |
34f42a07 | 2009 | */ |
85b4aa49 RL |
2010 | static void __exit fcoe_exit(void) |
2011 | { | |
5e5e92df | 2012 | unsigned int cpu; |
014f5c3f | 2013 | struct fcoe_interface *fcoe, *tmp; |
85b4aa49 | 2014 | |
85b4aa49 RL |
2015 | fcoe_dev_cleanup(); |
2016 | ||
5919a595 | 2017 | /* releases the associated fcoe hosts */ |
014f5c3f | 2018 | list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) |
3fe9a0ba | 2019 | fcoe_if_destroy(fcoe->ctlr.lp); |
85b4aa49 | 2020 | |
8976f424 RL |
2021 | unregister_hotcpu_notifier(&fcoe_cpu_notifier); |
2022 | ||
014f5c3f | 2023 | for_each_online_cpu(cpu) |
8976f424 | 2024 | fcoe_percpu_thread_destroy(cpu); |
85b4aa49 | 2025 | |
7f349142 VD |
2026 | /* detach from scsi transport */ |
2027 | fcoe_if_exit(); | |
85b4aa49 RL |
2028 | } |
2029 | module_exit(fcoe_exit); |