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85b4aa49 | 1 | /* |
af7f85d9 | 2 | * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved. |
85b4aa49 RL |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | * | |
17 | * Maintained at www.Open-FCoE.org | |
18 | */ | |
19 | ||
20 | #include <linux/module.h> | |
21 | #include <linux/version.h> | |
85b4aa49 | 22 | #include <linux/spinlock.h> |
85b4aa49 RL |
23 | #include <linux/netdevice.h> |
24 | #include <linux/etherdevice.h> | |
25 | #include <linux/ethtool.h> | |
26 | #include <linux/if_ether.h> | |
27 | #include <linux/if_vlan.h> | |
85b4aa49 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 | ||
dfc1d0fe CL |
58 | DEFINE_MUTEX(fcoe_config_mutex); |
59 | ||
85b4aa49 | 60 | /* fcoe host list */ |
090eb6c4 | 61 | /* must only by accessed under the RTNL mutex */ |
85b4aa49 | 62 | LIST_HEAD(fcoe_hostlist); |
5e5e92df | 63 | DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu); |
85b4aa49 | 64 | |
dd3fd72e | 65 | /* Function Prototypes */ |
fdd78027 VD |
66 | static int fcoe_reset(struct Scsi_Host *shost); |
67 | static int fcoe_xmit(struct fc_lport *, struct fc_frame *); | |
68 | static int fcoe_rcv(struct sk_buff *, struct net_device *, | |
69 | struct packet_type *, struct net_device *); | |
70 | static int fcoe_percpu_receive_thread(void *arg); | |
71 | static void fcoe_clean_pending_queue(struct fc_lport *lp); | |
72 | static void fcoe_percpu_clean(struct fc_lport *lp); | |
73 | static int fcoe_link_ok(struct fc_lport *lp); | |
74 | ||
75 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); | |
76 | static int fcoe_hostlist_add(const struct fc_lport *); | |
fdd78027 | 77 | |
4bb6b515 | 78 | static void fcoe_check_wait_queue(struct fc_lport *, struct sk_buff *); |
85b4aa49 RL |
79 | static int fcoe_device_notification(struct notifier_block *, ulong, void *); |
80 | static void fcoe_dev_setup(void); | |
81 | static void fcoe_dev_cleanup(void); | |
2e70e241 CL |
82 | static struct fcoe_interface * |
83 | fcoe_hostlist_lookup_port(const struct net_device *dev); | |
85b4aa49 RL |
84 | |
85 | /* notification function from net device */ | |
86 | static struct notifier_block fcoe_notifier = { | |
87 | .notifier_call = fcoe_device_notification, | |
88 | }; | |
89 | ||
7f349142 VD |
90 | static struct scsi_transport_template *scsi_transport_fcoe_sw; |
91 | ||
92 | struct fc_function_template fcoe_transport_function = { | |
93 | .show_host_node_name = 1, | |
94 | .show_host_port_name = 1, | |
95 | .show_host_supported_classes = 1, | |
96 | .show_host_supported_fc4s = 1, | |
97 | .show_host_active_fc4s = 1, | |
98 | .show_host_maxframe_size = 1, | |
99 | ||
100 | .show_host_port_id = 1, | |
101 | .show_host_supported_speeds = 1, | |
102 | .get_host_speed = fc_get_host_speed, | |
103 | .show_host_speed = 1, | |
104 | .show_host_port_type = 1, | |
105 | .get_host_port_state = fc_get_host_port_state, | |
106 | .show_host_port_state = 1, | |
107 | .show_host_symbolic_name = 1, | |
108 | ||
109 | .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), | |
110 | .show_rport_maxframe_size = 1, | |
111 | .show_rport_supported_classes = 1, | |
112 | ||
113 | .show_host_fabric_name = 1, | |
114 | .show_starget_node_name = 1, | |
115 | .show_starget_port_name = 1, | |
116 | .show_starget_port_id = 1, | |
117 | .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, | |
118 | .show_rport_dev_loss_tmo = 1, | |
119 | .get_fc_host_stats = fc_get_host_stats, | |
120 | .issue_fc_host_lip = fcoe_reset, | |
121 | ||
122 | .terminate_rport_io = fc_rport_terminate_io, | |
123 | }; | |
124 | ||
125 | static struct scsi_host_template fcoe_shost_template = { | |
126 | .module = THIS_MODULE, | |
127 | .name = "FCoE Driver", | |
128 | .proc_name = FCOE_NAME, | |
129 | .queuecommand = fc_queuecommand, | |
130 | .eh_abort_handler = fc_eh_abort, | |
131 | .eh_device_reset_handler = fc_eh_device_reset, | |
132 | .eh_host_reset_handler = fc_eh_host_reset, | |
133 | .slave_alloc = fc_slave_alloc, | |
134 | .change_queue_depth = fc_change_queue_depth, | |
135 | .change_queue_type = fc_change_queue_type, | |
136 | .this_id = -1, | |
137 | .cmd_per_lun = 32, | |
138 | .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, | |
139 | .use_clustering = ENABLE_CLUSTERING, | |
140 | .sg_tablesize = SG_ALL, | |
141 | .max_sectors = 0xffff, | |
142 | }; | |
143 | ||
54b649f8 CL |
144 | static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *dev, |
145 | struct packet_type *ptype, | |
146 | struct net_device *orig_dev); | |
147 | /** | |
148 | * fcoe_interface_setup() | |
149 | * @fcoe: new fcoe_interface | |
150 | * @netdev : ptr to the associated netdevice struct | |
151 | * | |
152 | * Returns : 0 for success | |
2e70e241 | 153 | * Locking: must be called with the RTNL mutex held |
54b649f8 CL |
154 | */ |
155 | static int fcoe_interface_setup(struct fcoe_interface *fcoe, | |
156 | struct net_device *netdev) | |
157 | { | |
158 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
159 | struct netdev_hw_addr *ha; | |
160 | u8 flogi_maddr[ETH_ALEN]; | |
161 | ||
162 | fcoe->netdev = netdev; | |
163 | ||
164 | /* Do not support for bonding device */ | |
165 | if ((netdev->priv_flags & IFF_MASTER_ALB) || | |
166 | (netdev->priv_flags & IFF_SLAVE_INACTIVE) || | |
167 | (netdev->priv_flags & IFF_MASTER_8023AD)) { | |
168 | return -EOPNOTSUPP; | |
169 | } | |
170 | ||
171 | /* look for SAN MAC address, if multiple SAN MACs exist, only | |
172 | * use the first one for SPMA */ | |
173 | rcu_read_lock(); | |
174 | for_each_dev_addr(netdev, ha) { | |
175 | if ((ha->type == NETDEV_HW_ADDR_T_SAN) && | |
176 | (is_valid_ether_addr(fip->ctl_src_addr))) { | |
177 | memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); | |
178 | fip->spma = 1; | |
179 | break; | |
180 | } | |
181 | } | |
182 | rcu_read_unlock(); | |
183 | ||
184 | /* setup Source Mac Address */ | |
185 | if (!fip->spma) | |
186 | memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); | |
187 | ||
188 | /* | |
189 | * Add FCoE MAC address as second unicast MAC address | |
190 | * or enter promiscuous mode if not capable of listening | |
191 | * for multiple unicast MACs. | |
192 | */ | |
54b649f8 CL |
193 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
194 | dev_unicast_add(netdev, flogi_maddr); | |
195 | if (fip->spma) | |
196 | dev_unicast_add(netdev, fip->ctl_src_addr); | |
197 | dev_mc_add(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0); | |
54b649f8 CL |
198 | |
199 | /* | |
200 | * setup the receive function from ethernet driver | |
201 | * on the ethertype for the given device | |
202 | */ | |
203 | fcoe->fcoe_packet_type.func = fcoe_rcv; | |
204 | fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE); | |
205 | fcoe->fcoe_packet_type.dev = netdev; | |
206 | dev_add_pack(&fcoe->fcoe_packet_type); | |
207 | ||
208 | fcoe->fip_packet_type.func = fcoe_fip_recv; | |
209 | fcoe->fip_packet_type.type = htons(ETH_P_FIP); | |
210 | fcoe->fip_packet_type.dev = netdev; | |
211 | dev_add_pack(&fcoe->fip_packet_type); | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
216 | static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb); | |
217 | static void fcoe_update_src_mac(struct fcoe_ctlr *fip, u8 *old, u8 *new); | |
2e70e241 | 218 | static void fcoe_destroy_work(struct work_struct *work); |
54b649f8 | 219 | |
030f4e00 CL |
220 | /** |
221 | * fcoe_interface_create() | |
222 | * @netdev: network interface | |
223 | * | |
224 | * Returns: pointer to a struct fcoe_interface or NULL on error | |
225 | */ | |
226 | static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev) | |
227 | { | |
228 | struct fcoe_interface *fcoe; | |
229 | ||
230 | fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL); | |
231 | if (!fcoe) { | |
232 | FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n"); | |
233 | return NULL; | |
234 | } | |
235 | ||
2e70e241 | 236 | dev_hold(netdev); |
030f4e00 | 237 | kref_init(&fcoe->kref); |
54b649f8 CL |
238 | |
239 | /* | |
240 | * Initialize FIP. | |
241 | */ | |
242 | fcoe_ctlr_init(&fcoe->ctlr); | |
243 | fcoe->ctlr.send = fcoe_fip_send; | |
244 | fcoe->ctlr.update_mac = fcoe_update_src_mac; | |
245 | ||
246 | fcoe_interface_setup(fcoe, netdev); | |
030f4e00 CL |
247 | |
248 | return fcoe; | |
249 | } | |
250 | ||
54b649f8 CL |
251 | /** |
252 | * fcoe_interface_cleanup() - clean up netdev configurations | |
253 | * @fcoe: | |
2e70e241 CL |
254 | * |
255 | * Caller must be holding the RTNL mutex | |
54b649f8 CL |
256 | */ |
257 | void fcoe_interface_cleanup(struct fcoe_interface *fcoe) | |
258 | { | |
259 | struct net_device *netdev = fcoe->netdev; | |
260 | struct fcoe_ctlr *fip = &fcoe->ctlr; | |
261 | u8 flogi_maddr[ETH_ALEN]; | |
262 | ||
263 | /* | |
264 | * Don't listen for Ethernet packets anymore. | |
265 | * synchronize_net() ensures that the packet handlers are not running | |
266 | * on another CPU. dev_remove_pack() would do that, this calls the | |
267 | * unsyncronized version __dev_remove_pack() to avoid multiple delays. | |
268 | */ | |
269 | __dev_remove_pack(&fcoe->fcoe_packet_type); | |
270 | __dev_remove_pack(&fcoe->fip_packet_type); | |
271 | synchronize_net(); | |
272 | ||
54b649f8 | 273 | /* Delete secondary MAC addresses */ |
54b649f8 CL |
274 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
275 | dev_unicast_delete(netdev, flogi_maddr); | |
276 | if (!is_zero_ether_addr(fip->data_src_addr)) | |
277 | dev_unicast_delete(netdev, fip->data_src_addr); | |
278 | if (fip->spma) | |
279 | dev_unicast_delete(netdev, fip->ctl_src_addr); | |
280 | dev_mc_delete(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0); | |
54b649f8 CL |
281 | } |
282 | ||
030f4e00 CL |
283 | /** |
284 | * fcoe_interface_release() - fcoe_port kref release function | |
285 | * @kref: embedded reference count in an fcoe_interface struct | |
286 | */ | |
287 | static void fcoe_interface_release(struct kref *kref) | |
288 | { | |
289 | struct fcoe_interface *fcoe; | |
2e70e241 | 290 | struct net_device *netdev; |
030f4e00 CL |
291 | |
292 | fcoe = container_of(kref, struct fcoe_interface, kref); | |
2e70e241 CL |
293 | netdev = fcoe->netdev; |
294 | /* tear-down the FCoE controller */ | |
295 | fcoe_ctlr_destroy(&fcoe->ctlr); | |
030f4e00 | 296 | kfree(fcoe); |
2e70e241 | 297 | dev_put(netdev); |
030f4e00 CL |
298 | } |
299 | ||
300 | /** | |
301 | * fcoe_interface_get() | |
302 | * @fcoe: | |
303 | */ | |
304 | static inline void fcoe_interface_get(struct fcoe_interface *fcoe) | |
305 | { | |
306 | kref_get(&fcoe->kref); | |
307 | } | |
308 | ||
309 | /** | |
310 | * fcoe_interface_put() | |
311 | * @fcoe: | |
312 | */ | |
313 | static inline void fcoe_interface_put(struct fcoe_interface *fcoe) | |
314 | { | |
315 | kref_put(&fcoe->kref, fcoe_interface_release); | |
316 | } | |
317 | ||
ab6b85c1 VD |
318 | /** |
319 | * fcoe_fip_recv - handle a received FIP frame. | |
320 | * @skb: the receive skb | |
321 | * @dev: associated &net_device | |
322 | * @ptype: the &packet_type structure which was used to register this handler. | |
323 | * @orig_dev: original receive &net_device, in case @dev is a bond. | |
324 | * | |
325 | * Returns: 0 for success | |
326 | */ | |
327 | static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *dev, | |
328 | struct packet_type *ptype, | |
329 | struct net_device *orig_dev) | |
330 | { | |
259ad85d | 331 | struct fcoe_interface *fcoe; |
ab6b85c1 | 332 | |
259ad85d | 333 | fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); |
3fe9a0ba | 334 | fcoe_ctlr_recv(&fcoe->ctlr, skb); |
ab6b85c1 VD |
335 | return 0; |
336 | } | |
337 | ||
338 | /** | |
339 | * fcoe_fip_send() - send an Ethernet-encapsulated FIP frame. | |
340 | * @fip: FCoE controller. | |
341 | * @skb: FIP Packet. | |
342 | */ | |
343 | static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
344 | { | |
3fe9a0ba | 345 | skb->dev = fcoe_from_ctlr(fip)->netdev; |
ab6b85c1 VD |
346 | dev_queue_xmit(skb); |
347 | } | |
348 | ||
349 | /** | |
350 | * fcoe_update_src_mac() - Update Ethernet MAC filters. | |
351 | * @fip: FCoE controller. | |
352 | * @old: Unicast MAC address to delete if the MAC is non-zero. | |
353 | * @new: Unicast MAC address to add. | |
354 | * | |
355 | * Remove any previously-set unicast MAC filter. | |
356 | * Add secondary FCoE MAC address filter for our OUI. | |
357 | */ | |
358 | static void fcoe_update_src_mac(struct fcoe_ctlr *fip, u8 *old, u8 *new) | |
359 | { | |
25024989 | 360 | struct fcoe_interface *fcoe; |
25024989 | 361 | |
3fe9a0ba | 362 | fcoe = fcoe_from_ctlr(fip); |
ab6b85c1 VD |
363 | rtnl_lock(); |
364 | if (!is_zero_ether_addr(old)) | |
25024989 CL |
365 | dev_unicast_delete(fcoe->netdev, old); |
366 | dev_unicast_add(fcoe->netdev, new); | |
ab6b85c1 VD |
367 | rtnl_unlock(); |
368 | } | |
369 | ||
7f349142 VD |
370 | /** |
371 | * fcoe_lport_config() - sets up the fc_lport | |
372 | * @lp: ptr to the fc_lport | |
7f349142 VD |
373 | * |
374 | * Returns: 0 for success | |
375 | */ | |
376 | static int fcoe_lport_config(struct fc_lport *lp) | |
377 | { | |
378 | lp->link_up = 0; | |
379 | lp->qfull = 0; | |
380 | lp->max_retry_count = 3; | |
a3666955 | 381 | lp->max_rport_retry_count = 3; |
7f349142 VD |
382 | lp->e_d_tov = 2 * 1000; /* FC-FS default */ |
383 | lp->r_a_tov = 2 * 2 * 1000; | |
384 | lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | | |
385 | FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); | |
386 | ||
387 | fc_lport_init_stats(lp); | |
388 | ||
389 | /* lport fc_lport related configuration */ | |
390 | fc_lport_config(lp); | |
391 | ||
392 | /* offload related configuration */ | |
393 | lp->crc_offload = 0; | |
394 | lp->seq_offload = 0; | |
395 | lp->lro_enabled = 0; | |
396 | lp->lro_xid = 0; | |
397 | lp->lso_max = 0; | |
398 | ||
399 | return 0; | |
400 | } | |
401 | ||
1047f221 VD |
402 | /** |
403 | * fcoe_queue_timer() - fcoe queue timer | |
404 | * @lp: the fc_lport pointer | |
405 | * | |
406 | * Calls fcoe_check_wait_queue on timeout | |
407 | * | |
408 | */ | |
409 | static void fcoe_queue_timer(ulong lp) | |
410 | { | |
411 | fcoe_check_wait_queue((struct fc_lport *)lp, NULL); | |
412 | } | |
413 | ||
7f349142 VD |
414 | /** |
415 | * fcoe_netdev_config() - Set up netdev for SW FCoE | |
416 | * @lp : ptr to the fc_lport | |
417 | * @netdev : ptr to the associated netdevice struct | |
418 | * | |
419 | * Must be called after fcoe_lport_config() as it will use lport mutex | |
420 | * | |
421 | * Returns : 0 for success | |
422 | */ | |
423 | static int fcoe_netdev_config(struct fc_lport *lp, struct net_device *netdev) | |
424 | { | |
425 | u32 mfs; | |
426 | u64 wwnn, wwpn; | |
25024989 | 427 | struct fcoe_interface *fcoe; |
014f5c3f | 428 | struct fcoe_port *port; |
7f349142 VD |
429 | |
430 | /* Setup lport private data to point to fcoe softc */ | |
014f5c3f | 431 | port = lport_priv(lp); |
25024989 | 432 | fcoe = port->fcoe; |
7f349142 VD |
433 | |
434 | /* | |
435 | * Determine max frame size based on underlying device and optional | |
436 | * user-configured limit. If the MFS is too low, fcoe_link_ok() | |
437 | * will return 0, so do this first. | |
438 | */ | |
1d1b88dc VD |
439 | mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + |
440 | sizeof(struct fcoe_crc_eof)); | |
7f349142 VD |
441 | if (fc_set_mfs(lp, mfs)) |
442 | return -EINVAL; | |
443 | ||
7f349142 | 444 | /* offload features support */ |
1d1b88dc | 445 | if (netdev->features & NETIF_F_SG) |
7f349142 VD |
446 | lp->sg_supp = 1; |
447 | ||
7f349142 VD |
448 | if (netdev->features & NETIF_F_FCOE_CRC) { |
449 | lp->crc_offload = 1; | |
d5488eb9 | 450 | FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); |
7f349142 | 451 | } |
7f349142 VD |
452 | if (netdev->features & NETIF_F_FSO) { |
453 | lp->seq_offload = 1; | |
454 | lp->lso_max = netdev->gso_max_size; | |
d5488eb9 RL |
455 | FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", |
456 | lp->lso_max); | |
7f349142 | 457 | } |
7f349142 VD |
458 | if (netdev->fcoe_ddp_xid) { |
459 | lp->lro_enabled = 1; | |
460 | lp->lro_xid = netdev->fcoe_ddp_xid; | |
d5488eb9 RL |
461 | FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", |
462 | lp->lro_xid); | |
7f349142 | 463 | } |
014f5c3f CL |
464 | skb_queue_head_init(&port->fcoe_pending_queue); |
465 | port->fcoe_pending_queue_active = 0; | |
466 | setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lp); | |
7f349142 | 467 | |
1d1b88dc | 468 | wwnn = fcoe_wwn_from_mac(netdev->dev_addr, 1, 0); |
7f349142 VD |
469 | fc_set_wwnn(lp, wwnn); |
470 | /* XXX - 3rd arg needs to be vlan id */ | |
1d1b88dc | 471 | wwpn = fcoe_wwn_from_mac(netdev->dev_addr, 2, 0); |
7f349142 VD |
472 | fc_set_wwpn(lp, wwpn); |
473 | ||
7f349142 VD |
474 | return 0; |
475 | } | |
476 | ||
477 | /** | |
478 | * fcoe_shost_config() - Sets up fc_lport->host | |
479 | * @lp : ptr to the fc_lport | |
480 | * @shost : ptr to the associated scsi host | |
481 | * @dev : device associated to scsi host | |
482 | * | |
483 | * Must be called after fcoe_lport_config() and fcoe_netdev_config() | |
484 | * | |
485 | * Returns : 0 for success | |
486 | */ | |
487 | static int fcoe_shost_config(struct fc_lport *lp, struct Scsi_Host *shost, | |
488 | struct device *dev) | |
489 | { | |
490 | int rc = 0; | |
491 | ||
492 | /* lport scsi host config */ | |
493 | lp->host = shost; | |
494 | ||
495 | lp->host->max_lun = FCOE_MAX_LUN; | |
496 | lp->host->max_id = FCOE_MAX_FCP_TARGET; | |
497 | lp->host->max_channel = 0; | |
498 | lp->host->transportt = scsi_transport_fcoe_sw; | |
499 | ||
500 | /* add the new host to the SCSI-ml */ | |
501 | rc = scsi_add_host(lp->host, dev); | |
502 | if (rc) { | |
d5488eb9 RL |
503 | FCOE_NETDEV_DBG(fcoe_netdev(lp), "fcoe_shost_config: " |
504 | "error on scsi_add_host\n"); | |
7f349142 VD |
505 | return rc; |
506 | } | |
507 | sprintf(fc_host_symbolic_name(lp->host), "%s v%s over %s", | |
508 | FCOE_NAME, FCOE_VERSION, | |
509 | fcoe_netdev(lp)->name); | |
510 | ||
511 | return 0; | |
512 | } | |
513 | ||
d7179680 VD |
514 | /* |
515 | * fcoe_oem_match() - match for read types IO | |
516 | * @fp: the fc_frame for new IO. | |
517 | * | |
518 | * Returns : true for read types IO, otherwise returns false. | |
519 | */ | |
520 | bool fcoe_oem_match(struct fc_frame *fp) | |
521 | { | |
05cc7390 YZ |
522 | return fc_fcp_is_read(fr_fsp(fp)) && |
523 | (fr_fsp(fp)->data_len > fcoe_ddp_min); | |
d7179680 VD |
524 | } |
525 | ||
7f349142 VD |
526 | /** |
527 | * fcoe_em_config() - allocates em for this lport | |
014f5c3f | 528 | * @lp: the fcoe that em is to allocated for |
7f349142 VD |
529 | * |
530 | * Returns : 0 on success | |
531 | */ | |
532 | static inline int fcoe_em_config(struct fc_lport *lp) | |
533 | { | |
014f5c3f | 534 | struct fcoe_port *port = lport_priv(lp); |
25024989 CL |
535 | struct fcoe_interface *fcoe = port->fcoe; |
536 | struct fcoe_interface *oldfcoe = NULL; | |
1d1b88dc | 537 | struct net_device *old_real_dev, *cur_real_dev; |
d7179680 VD |
538 | u16 min_xid = FCOE_MIN_XID; |
539 | u16 max_xid = FCOE_MAX_XID; | |
540 | ||
541 | /* | |
542 | * Check if need to allocate an em instance for | |
543 | * offload exchange ids to be shared across all VN_PORTs/lport. | |
544 | */ | |
545 | if (!lp->lro_enabled || !lp->lro_xid || (lp->lro_xid >= max_xid)) { | |
546 | lp->lro_xid = 0; | |
547 | goto skip_oem; | |
548 | } | |
549 | ||
550 | /* | |
551 | * Reuse existing offload em instance in case | |
1d1b88dc | 552 | * it is already allocated on real eth device |
d7179680 | 553 | */ |
25024989 CL |
554 | if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
555 | cur_real_dev = vlan_dev_real_dev(fcoe->netdev); | |
1d1b88dc | 556 | else |
25024989 | 557 | cur_real_dev = fcoe->netdev; |
1d1b88dc | 558 | |
25024989 | 559 | list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { |
25024989 CL |
560 | if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
561 | old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); | |
1d1b88dc | 562 | else |
25024989 | 563 | old_real_dev = oldfcoe->netdev; |
1d1b88dc VD |
564 | |
565 | if (cur_real_dev == old_real_dev) { | |
991cbb60 | 566 | fcoe->oem = oldfcoe->oem; |
d7179680 VD |
567 | break; |
568 | } | |
569 | } | |
570 | ||
991cbb60 CL |
571 | if (fcoe->oem) { |
572 | if (!fc_exch_mgr_add(lp, fcoe->oem, fcoe_oem_match)) { | |
d7179680 VD |
573 | printk(KERN_ERR "fcoe_em_config: failed to add " |
574 | "offload em:%p on interface:%s\n", | |
991cbb60 | 575 | fcoe->oem, fcoe->netdev->name); |
d7179680 VD |
576 | return -ENOMEM; |
577 | } | |
578 | } else { | |
991cbb60 | 579 | fcoe->oem = fc_exch_mgr_alloc(lp, FC_CLASS_3, |
d7179680 VD |
580 | FCOE_MIN_XID, lp->lro_xid, |
581 | fcoe_oem_match); | |
991cbb60 | 582 | if (!fcoe->oem) { |
d7179680 VD |
583 | printk(KERN_ERR "fcoe_em_config: failed to allocate " |
584 | "em for offload exches on interface:%s\n", | |
25024989 | 585 | fcoe->netdev->name); |
d7179680 VD |
586 | return -ENOMEM; |
587 | } | |
588 | } | |
589 | ||
590 | /* | |
591 | * Exclude offload EM xid range from next EM xid range. | |
592 | */ | |
593 | min_xid += lp->lro_xid + 1; | |
594 | ||
595 | skip_oem: | |
596 | if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, min_xid, max_xid, NULL)) { | |
597 | printk(KERN_ERR "fcoe_em_config: failed to " | |
25024989 | 598 | "allocate em on interface %s\n", fcoe->netdev->name); |
7f349142 | 599 | return -ENOMEM; |
d7179680 | 600 | } |
7f349142 VD |
601 | |
602 | return 0; | |
603 | } | |
604 | ||
605 | /** | |
606 | * fcoe_if_destroy() - FCoE software HBA tear-down function | |
af7f85d9 | 607 | * @lport: fc_lport to destroy |
7f349142 | 608 | */ |
af7f85d9 | 609 | static void fcoe_if_destroy(struct fc_lport *lport) |
7f349142 | 610 | { |
014f5c3f CL |
611 | struct fcoe_port *port = lport_priv(lport); |
612 | struct fcoe_interface *fcoe = port->fcoe; | |
25024989 | 613 | struct net_device *netdev = fcoe->netdev; |
7f349142 | 614 | |
d5488eb9 | 615 | FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); |
7f349142 | 616 | |
7f349142 | 617 | /* Logout of the fabric */ |
af7f85d9 | 618 | fc_fabric_logoff(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 | 645 | |
2e70e241 | 646 | /* Release the Scsi_Host */ |
af7f85d9 | 647 | scsi_host_put(lport->host); |
7f349142 VD |
648 | } |
649 | ||
650 | /* | |
651 | * fcoe_ddp_setup - calls LLD's ddp_setup through net_device | |
652 | * @lp: the corresponding fc_lport | |
653 | * @xid: the exchange id for this ddp transfer | |
654 | * @sgl: the scatterlist describing this transfer | |
655 | * @sgc: number of sg items | |
656 | * | |
657 | * Returns : 0 no ddp | |
658 | */ | |
659 | static int fcoe_ddp_setup(struct fc_lport *lp, u16 xid, | |
660 | struct scatterlist *sgl, unsigned int sgc) | |
661 | { | |
662 | struct net_device *n = fcoe_netdev(lp); | |
663 | ||
664 | if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_setup) | |
665 | return n->netdev_ops->ndo_fcoe_ddp_setup(n, xid, sgl, sgc); | |
666 | ||
667 | return 0; | |
668 | } | |
669 | ||
670 | /* | |
671 | * fcoe_ddp_done - calls LLD's ddp_done through net_device | |
672 | * @lp: the corresponding fc_lport | |
673 | * @xid: the exchange id for this ddp transfer | |
674 | * | |
675 | * Returns : the length of data that have been completed by ddp | |
676 | */ | |
677 | static int fcoe_ddp_done(struct fc_lport *lp, u16 xid) | |
678 | { | |
679 | struct net_device *n = fcoe_netdev(lp); | |
680 | ||
681 | if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_done) | |
682 | return n->netdev_ops->ndo_fcoe_ddp_done(n, xid); | |
683 | return 0; | |
684 | } | |
685 | ||
686 | static struct libfc_function_template fcoe_libfc_fcn_templ = { | |
687 | .frame_send = fcoe_xmit, | |
688 | .ddp_setup = fcoe_ddp_setup, | |
689 | .ddp_done = fcoe_ddp_done, | |
690 | }; | |
691 | ||
692 | /** | |
030f4e00 CL |
693 | * fcoe_if_create() - this function creates the fcoe port |
694 | * @fcoe: fcoe_interface structure to create an fc_lport instance on | |
af7f85d9 | 695 | * @parent: device pointer to be the parent in sysfs for the SCSI host |
7f349142 | 696 | * |
54b649f8 | 697 | * Creates fc_lport struct and scsi_host for lport, configures lport. |
7f349142 | 698 | * |
af7f85d9 | 699 | * Returns : The allocated fc_lport or an error pointer |
7f349142 | 700 | */ |
030f4e00 | 701 | static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, |
af7f85d9 | 702 | struct device *parent) |
7f349142 VD |
703 | { |
704 | int rc; | |
af7f85d9 | 705 | struct fc_lport *lport = NULL; |
014f5c3f | 706 | struct fcoe_port *port; |
7f349142 | 707 | struct Scsi_Host *shost; |
030f4e00 | 708 | struct net_device *netdev = fcoe->netdev; |
7f349142 | 709 | |
d5488eb9 | 710 | FCOE_NETDEV_DBG(netdev, "Create Interface\n"); |
7f349142 | 711 | |
a0a25da2 | 712 | shost = libfc_host_alloc(&fcoe_shost_template, |
014f5c3f | 713 | sizeof(struct fcoe_port)); |
7f349142 | 714 | if (!shost) { |
d5488eb9 | 715 | FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); |
af7f85d9 | 716 | rc = -ENOMEM; |
030f4e00 | 717 | goto out; |
7f349142 | 718 | } |
af7f85d9 | 719 | lport = shost_priv(shost); |
014f5c3f | 720 | port = lport_priv(lport); |
2e70e241 | 721 | port->lport = lport; |
014f5c3f | 722 | port->fcoe = fcoe; |
2e70e241 | 723 | INIT_WORK(&port->destroy_work, fcoe_destroy_work); |
7f349142 VD |
724 | |
725 | /* configure fc_lport, e.g., em */ | |
af7f85d9 | 726 | rc = fcoe_lport_config(lport); |
7f349142 | 727 | if (rc) { |
d5488eb9 RL |
728 | FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " |
729 | "interface\n"); | |
7f349142 VD |
730 | goto out_host_put; |
731 | } | |
732 | ||
ab6b85c1 | 733 | /* configure lport network properties */ |
af7f85d9 | 734 | rc = fcoe_netdev_config(lport, netdev); |
ab6b85c1 | 735 | if (rc) { |
d5488eb9 RL |
736 | FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " |
737 | "interface\n"); | |
54b649f8 | 738 | goto out_lp_destroy; |
ab6b85c1 | 739 | } |
97c8389d | 740 | |
7f349142 | 741 | /* configure lport scsi host properties */ |
af7f85d9 | 742 | rc = fcoe_shost_config(lport, shost, parent); |
7f349142 | 743 | if (rc) { |
d5488eb9 RL |
744 | FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " |
745 | "interface\n"); | |
54b649f8 | 746 | goto out_lp_destroy; |
7f349142 VD |
747 | } |
748 | ||
96316099 | 749 | /* Initialize the library */ |
af7f85d9 | 750 | rc = fcoe_libfc_config(lport, &fcoe_libfc_fcn_templ); |
7f349142 | 751 | if (rc) { |
96316099 | 752 | FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " |
d5488eb9 | 753 | "interface\n"); |
96316099 | 754 | goto out_lp_destroy; |
7f349142 VD |
755 | } |
756 | ||
e8af4d43 VD |
757 | /* |
758 | * fcoe_em_alloc() and fcoe_hostlist_add() both | |
c863df33 | 759 | * need to be atomic with respect to other changes to the hostlist |
e8af4d43 VD |
760 | * since fcoe_em_alloc() looks for an existing EM |
761 | * instance on host list updated by fcoe_hostlist_add(). | |
c863df33 CL |
762 | * |
763 | * This is currently handled through the fcoe_config_mutex begin held. | |
e8af4d43 | 764 | */ |
c863df33 | 765 | |
96316099 | 766 | /* lport exch manager allocation */ |
af7f85d9 | 767 | rc = fcoe_em_config(lport); |
7f349142 | 768 | if (rc) { |
96316099 | 769 | FCOE_NETDEV_DBG(netdev, "Could not configure the EM for the " |
d5488eb9 | 770 | "interface\n"); |
7f349142 VD |
771 | goto out_lp_destroy; |
772 | } | |
773 | ||
030f4e00 | 774 | fcoe_interface_get(fcoe); |
af7f85d9 | 775 | return lport; |
7f349142 VD |
776 | |
777 | out_lp_destroy: | |
af7f85d9 | 778 | fc_exch_mgr_free(lport); |
7f349142 | 779 | out_host_put: |
af7f85d9 CL |
780 | scsi_host_put(lport->host); |
781 | out: | |
782 | return ERR_PTR(rc); | |
7f349142 VD |
783 | } |
784 | ||
785 | /** | |
786 | * fcoe_if_init() - attach to scsi transport | |
787 | * | |
788 | * Returns : 0 on success | |
789 | */ | |
790 | static int __init fcoe_if_init(void) | |
791 | { | |
792 | /* attach to scsi transport */ | |
793 | scsi_transport_fcoe_sw = | |
794 | fc_attach_transport(&fcoe_transport_function); | |
795 | ||
796 | if (!scsi_transport_fcoe_sw) { | |
d5488eb9 | 797 | printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); |
7f349142 VD |
798 | return -ENODEV; |
799 | } | |
800 | ||
801 | return 0; | |
802 | } | |
803 | ||
804 | /** | |
805 | * fcoe_if_exit() - detach from scsi transport | |
806 | * | |
807 | * Returns : 0 on success | |
808 | */ | |
809 | int __exit fcoe_if_exit(void) | |
810 | { | |
811 | fc_release_transport(scsi_transport_fcoe_sw); | |
dfc1d0fe | 812 | scsi_transport_fcoe_sw = NULL; |
7f349142 VD |
813 | return 0; |
814 | } | |
815 | ||
8976f424 RL |
816 | /** |
817 | * fcoe_percpu_thread_create() - Create a receive thread for an online cpu | |
818 | * @cpu: cpu index for the online cpu | |
819 | */ | |
820 | static void fcoe_percpu_thread_create(unsigned int cpu) | |
821 | { | |
822 | struct fcoe_percpu_s *p; | |
823 | struct task_struct *thread; | |
824 | ||
825 | p = &per_cpu(fcoe_percpu, cpu); | |
826 | ||
827 | thread = kthread_create(fcoe_percpu_receive_thread, | |
828 | (void *)p, "fcoethread/%d", cpu); | |
829 | ||
830 | if (likely(!IS_ERR(p->thread))) { | |
831 | kthread_bind(thread, cpu); | |
832 | wake_up_process(thread); | |
833 | ||
834 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
835 | p->thread = thread; | |
836 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
837 | } | |
838 | } | |
839 | ||
840 | /** | |
841 | * fcoe_percpu_thread_destroy() - removes the rx thread for the given cpu | |
842 | * @cpu: cpu index the rx thread is to be removed | |
843 | * | |
844 | * Destroys a per-CPU Rx thread. Any pending skbs are moved to the | |
845 | * current CPU's Rx thread. If the thread being destroyed is bound to | |
846 | * the CPU processing this context the skbs will be freed. | |
847 | */ | |
848 | static void fcoe_percpu_thread_destroy(unsigned int cpu) | |
849 | { | |
850 | struct fcoe_percpu_s *p; | |
851 | struct task_struct *thread; | |
852 | struct page *crc_eof; | |
853 | struct sk_buff *skb; | |
854 | #ifdef CONFIG_SMP | |
855 | struct fcoe_percpu_s *p0; | |
856 | unsigned targ_cpu = smp_processor_id(); | |
857 | #endif /* CONFIG_SMP */ | |
858 | ||
d5488eb9 | 859 | FCOE_DBG("Destroying receive thread for CPU %d\n", cpu); |
8976f424 RL |
860 | |
861 | /* Prevent any new skbs from being queued for this CPU. */ | |
862 | p = &per_cpu(fcoe_percpu, cpu); | |
863 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
864 | thread = p->thread; | |
865 | p->thread = NULL; | |
866 | crc_eof = p->crc_eof_page; | |
867 | p->crc_eof_page = NULL; | |
868 | p->crc_eof_offset = 0; | |
869 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
870 | ||
871 | #ifdef CONFIG_SMP | |
872 | /* | |
873 | * Don't bother moving the skb's if this context is running | |
874 | * on the same CPU that is having its thread destroyed. This | |
875 | * can easily happen when the module is removed. | |
876 | */ | |
877 | if (cpu != targ_cpu) { | |
878 | p0 = &per_cpu(fcoe_percpu, targ_cpu); | |
879 | spin_lock_bh(&p0->fcoe_rx_list.lock); | |
880 | if (p0->thread) { | |
d5488eb9 RL |
881 | FCOE_DBG("Moving frames from CPU %d to CPU %d\n", |
882 | cpu, targ_cpu); | |
8976f424 RL |
883 | |
884 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
885 | __skb_queue_tail(&p0->fcoe_rx_list, skb); | |
886 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
887 | } else { | |
888 | /* | |
889 | * The targeted CPU is not initialized and cannot accept | |
890 | * new skbs. Unlock the targeted CPU and drop the skbs | |
891 | * on the CPU that is going offline. | |
892 | */ | |
893 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
894 | kfree_skb(skb); | |
895 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
896 | } | |
897 | } else { | |
898 | /* | |
899 | * This scenario occurs when the module is being removed | |
900 | * and all threads are being destroyed. skbs will continue | |
901 | * to be shifted from the CPU thread that is being removed | |
902 | * to the CPU thread associated with the CPU that is processing | |
903 | * the module removal. Once there is only one CPU Rx thread it | |
904 | * will reach this case and we will drop all skbs and later | |
905 | * stop the thread. | |
906 | */ | |
907 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
908 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
909 | kfree_skb(skb); | |
910 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
911 | } | |
912 | #else | |
913 | /* | |
dd3fd72e | 914 | * This a non-SMP scenario where the singular Rx thread is |
8976f424 RL |
915 | * being removed. Free all skbs and stop the thread. |
916 | */ | |
917 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
918 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
919 | kfree_skb(skb); | |
920 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
921 | #endif | |
922 | ||
923 | if (thread) | |
924 | kthread_stop(thread); | |
925 | ||
926 | if (crc_eof) | |
927 | put_page(crc_eof); | |
928 | } | |
929 | ||
930 | /** | |
931 | * fcoe_cpu_callback() - fcoe cpu hotplug event callback | |
932 | * @nfb: callback data block | |
933 | * @action: event triggering the callback | |
934 | * @hcpu: index for the cpu of this event | |
935 | * | |
936 | * This creates or destroys per cpu data for fcoe | |
937 | * | |
938 | * Returns NOTIFY_OK always. | |
939 | */ | |
940 | static int fcoe_cpu_callback(struct notifier_block *nfb, | |
941 | unsigned long action, void *hcpu) | |
942 | { | |
943 | unsigned cpu = (unsigned long)hcpu; | |
944 | ||
945 | switch (action) { | |
946 | case CPU_ONLINE: | |
947 | case CPU_ONLINE_FROZEN: | |
d5488eb9 | 948 | FCOE_DBG("CPU %x online: Create Rx thread\n", cpu); |
8976f424 RL |
949 | fcoe_percpu_thread_create(cpu); |
950 | break; | |
951 | case CPU_DEAD: | |
952 | case CPU_DEAD_FROZEN: | |
d5488eb9 | 953 | FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu); |
8976f424 RL |
954 | fcoe_percpu_thread_destroy(cpu); |
955 | break; | |
956 | default: | |
957 | break; | |
958 | } | |
959 | return NOTIFY_OK; | |
960 | } | |
961 | ||
962 | static struct notifier_block fcoe_cpu_notifier = { | |
963 | .notifier_call = fcoe_cpu_callback, | |
964 | }; | |
965 | ||
85b4aa49 | 966 | /** |
34f42a07 | 967 | * fcoe_rcv() - this is the fcoe receive function called by NET_RX_SOFTIRQ |
85b4aa49 RL |
968 | * @skb: the receive skb |
969 | * @dev: associated net device | |
970 | * @ptype: context | |
dd3fd72e | 971 | * @olddev: last device |
85b4aa49 RL |
972 | * |
973 | * this function will receive the packet and build fc frame and pass it up | |
974 | * | |
975 | * Returns: 0 for success | |
34f42a07 | 976 | */ |
85b4aa49 RL |
977 | int fcoe_rcv(struct sk_buff *skb, struct net_device *dev, |
978 | struct packet_type *ptype, struct net_device *olddev) | |
979 | { | |
980 | struct fc_lport *lp; | |
981 | struct fcoe_rcv_info *fr; | |
259ad85d | 982 | struct fcoe_interface *fcoe; |
85b4aa49 | 983 | struct fc_frame_header *fh; |
85b4aa49 | 984 | struct fcoe_percpu_s *fps; |
b2f0091f | 985 | unsigned int cpu; |
85b4aa49 | 986 | |
259ad85d | 987 | fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); |
3fe9a0ba | 988 | lp = fcoe->ctlr.lp; |
85b4aa49 | 989 | if (unlikely(lp == NULL)) { |
d5488eb9 | 990 | FCOE_NETDEV_DBG(dev, "Cannot find hba structure"); |
85b4aa49 RL |
991 | goto err2; |
992 | } | |
97c8389d JE |
993 | if (!lp->link_up) |
994 | goto err2; | |
85b4aa49 | 995 | |
d5488eb9 RL |
996 | FCOE_NETDEV_DBG(dev, "skb_info: len:%d data_len:%d head:%p " |
997 | "data:%p tail:%p end:%p sum:%d dev:%s", | |
998 | skb->len, skb->data_len, skb->head, skb->data, | |
999 | skb_tail_pointer(skb), skb_end_pointer(skb), | |
1000 | skb->csum, skb->dev ? skb->dev->name : "<NULL>"); | |
85b4aa49 RL |
1001 | |
1002 | /* check for FCOE packet type */ | |
1003 | if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) { | |
d5488eb9 | 1004 | FCOE_NETDEV_DBG(dev, "Wrong FC type frame"); |
85b4aa49 RL |
1005 | goto err; |
1006 | } | |
1007 | ||
1008 | /* | |
1009 | * Check for minimum frame length, and make sure required FCoE | |
1010 | * and FC headers are pulled into the linear data area. | |
1011 | */ | |
1012 | if (unlikely((skb->len < FCOE_MIN_FRAME) || | |
1013 | !pskb_may_pull(skb, FCOE_HEADER_LEN))) | |
1014 | goto err; | |
1015 | ||
1016 | skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); | |
1017 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1018 | ||
85b4aa49 RL |
1019 | fr = fcoe_dev_from_skb(skb); |
1020 | fr->fr_dev = lp; | |
1021 | fr->ptype = ptype; | |
5e5e92df | 1022 | |
85b4aa49 | 1023 | /* |
b2f0091f VD |
1024 | * In case the incoming frame's exchange is originated from |
1025 | * the initiator, then received frame's exchange id is ANDed | |
1026 | * with fc_cpu_mask bits to get the same cpu on which exchange | |
1027 | * was originated, otherwise just use the current cpu. | |
85b4aa49 | 1028 | */ |
b2f0091f VD |
1029 | if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) |
1030 | cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; | |
1031 | else | |
1032 | cpu = smp_processor_id(); | |
5e5e92df | 1033 | |
8976f424 | 1034 | fps = &per_cpu(fcoe_percpu, cpu); |
85b4aa49 | 1035 | spin_lock_bh(&fps->fcoe_rx_list.lock); |
8976f424 RL |
1036 | if (unlikely(!fps->thread)) { |
1037 | /* | |
1038 | * The targeted CPU is not ready, let's target | |
1039 | * the first CPU now. For non-SMP systems this | |
1040 | * will check the same CPU twice. | |
1041 | */ | |
d5488eb9 RL |
1042 | FCOE_NETDEV_DBG(dev, "CPU is online, but no receive thread " |
1043 | "ready for incoming skb- using first online " | |
1044 | "CPU.\n"); | |
8976f424 RL |
1045 | |
1046 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1047 | cpu = first_cpu(cpu_online_map); | |
1048 | fps = &per_cpu(fcoe_percpu, cpu); | |
1049 | spin_lock_bh(&fps->fcoe_rx_list.lock); | |
1050 | if (!fps->thread) { | |
1051 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1052 | goto err; | |
1053 | } | |
1054 | } | |
1055 | ||
1056 | /* | |
1057 | * We now have a valid CPU that we're targeting for | |
1058 | * this skb. We also have this receive thread locked, | |
1059 | * so we're free to queue skbs into it's queue. | |
1060 | */ | |
85b4aa49 RL |
1061 | __skb_queue_tail(&fps->fcoe_rx_list, skb); |
1062 | if (fps->fcoe_rx_list.qlen == 1) | |
1063 | wake_up_process(fps->thread); | |
1064 | ||
1065 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1066 | ||
1067 | return 0; | |
1068 | err: | |
582b45bc | 1069 | fc_lport_get_stats(lp)->ErrorFrames++; |
85b4aa49 RL |
1070 | |
1071 | err2: | |
1072 | kfree_skb(skb); | |
1073 | return -1; | |
1074 | } | |
85b4aa49 RL |
1075 | |
1076 | /** | |
34f42a07 | 1077 | * fcoe_start_io() - pass to netdev to start xmit for fcoe |
85b4aa49 RL |
1078 | * @skb: the skb to be xmitted |
1079 | * | |
1080 | * Returns: 0 for success | |
34f42a07 | 1081 | */ |
85b4aa49 RL |
1082 | static inline int fcoe_start_io(struct sk_buff *skb) |
1083 | { | |
1084 | int rc; | |
1085 | ||
1086 | skb_get(skb); | |
1087 | rc = dev_queue_xmit(skb); | |
1088 | if (rc != 0) | |
1089 | return rc; | |
1090 | kfree_skb(skb); | |
1091 | return 0; | |
1092 | } | |
1093 | ||
1094 | /** | |
dd3fd72e | 1095 | * fcoe_get_paged_crc_eof() - in case we need to alloc a page for crc_eof |
85b4aa49 RL |
1096 | * @skb: the skb to be xmitted |
1097 | * @tlen: total len | |
1098 | * | |
1099 | * Returns: 0 for success | |
34f42a07 | 1100 | */ |
85b4aa49 RL |
1101 | static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen) |
1102 | { | |
1103 | struct fcoe_percpu_s *fps; | |
1104 | struct page *page; | |
85b4aa49 | 1105 | |
5e5e92df | 1106 | fps = &get_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1107 | page = fps->crc_eof_page; |
1108 | if (!page) { | |
1109 | page = alloc_page(GFP_ATOMIC); | |
1110 | if (!page) { | |
5e5e92df | 1111 | put_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1112 | return -ENOMEM; |
1113 | } | |
1114 | fps->crc_eof_page = page; | |
8976f424 | 1115 | fps->crc_eof_offset = 0; |
85b4aa49 RL |
1116 | } |
1117 | ||
1118 | get_page(page); | |
1119 | skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page, | |
1120 | fps->crc_eof_offset, tlen); | |
1121 | skb->len += tlen; | |
1122 | skb->data_len += tlen; | |
1123 | skb->truesize += tlen; | |
1124 | fps->crc_eof_offset += sizeof(struct fcoe_crc_eof); | |
1125 | ||
1126 | if (fps->crc_eof_offset >= PAGE_SIZE) { | |
1127 | fps->crc_eof_page = NULL; | |
1128 | fps->crc_eof_offset = 0; | |
1129 | put_page(page); | |
1130 | } | |
5e5e92df | 1131 | put_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1132 | return 0; |
1133 | } | |
1134 | ||
1135 | /** | |
34f42a07 | 1136 | * fcoe_fc_crc() - calculates FC CRC in this fcoe skb |
dd3fd72e | 1137 | * @fp: the fc_frame containing data to be checksummed |
85b4aa49 | 1138 | * |
014f5c3f | 1139 | * This uses crc32() to calculate the crc for port frame |
85b4aa49 | 1140 | * Return : 32 bit crc |
34f42a07 | 1141 | */ |
85b4aa49 RL |
1142 | u32 fcoe_fc_crc(struct fc_frame *fp) |
1143 | { | |
1144 | struct sk_buff *skb = fp_skb(fp); | |
1145 | struct skb_frag_struct *frag; | |
1146 | unsigned char *data; | |
1147 | unsigned long off, len, clen; | |
1148 | u32 crc; | |
1149 | unsigned i; | |
1150 | ||
1151 | crc = crc32(~0, skb->data, skb_headlen(skb)); | |
1152 | ||
1153 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1154 | frag = &skb_shinfo(skb)->frags[i]; | |
1155 | off = frag->page_offset; | |
1156 | len = frag->size; | |
1157 | while (len > 0) { | |
1158 | clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK)); | |
1159 | data = kmap_atomic(frag->page + (off >> PAGE_SHIFT), | |
1160 | KM_SKB_DATA_SOFTIRQ); | |
1161 | crc = crc32(crc, data + (off & ~PAGE_MASK), clen); | |
1162 | kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ); | |
1163 | off += clen; | |
1164 | len -= clen; | |
1165 | } | |
1166 | } | |
1167 | return crc; | |
1168 | } | |
85b4aa49 RL |
1169 | |
1170 | /** | |
34f42a07 | 1171 | * fcoe_xmit() - FCoE frame transmit function |
014f5c3f | 1172 | * @lp: the associated local fcoe |
85b4aa49 RL |
1173 | * @fp: the fc_frame to be transmitted |
1174 | * | |
1175 | * Return : 0 for success | |
34f42a07 | 1176 | */ |
85b4aa49 RL |
1177 | int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp) |
1178 | { | |
4bb6b515 | 1179 | int wlen; |
85b4aa49 RL |
1180 | u32 crc; |
1181 | struct ethhdr *eh; | |
1182 | struct fcoe_crc_eof *cp; | |
1183 | struct sk_buff *skb; | |
1184 | struct fcoe_dev_stats *stats; | |
1185 | struct fc_frame_header *fh; | |
1186 | unsigned int hlen; /* header length implies the version */ | |
1187 | unsigned int tlen; /* trailer length */ | |
1188 | unsigned int elen; /* eth header, may include vlan */ | |
3fe9a0ba CL |
1189 | struct fcoe_port *port = lport_priv(lp); |
1190 | struct fcoe_interface *fcoe = port->fcoe; | |
85b4aa49 RL |
1191 | u8 sof, eof; |
1192 | struct fcoe_hdr *hp; | |
1193 | ||
1194 | WARN_ON((fr_len(fp) % sizeof(u32)) != 0); | |
1195 | ||
85b4aa49 | 1196 | fh = fc_frame_header_get(fp); |
97c8389d JE |
1197 | skb = fp_skb(fp); |
1198 | wlen = skb->len / FCOE_WORD_TO_BYTE; | |
1199 | ||
1200 | if (!lp->link_up) { | |
3caf02ee | 1201 | kfree_skb(skb); |
97c8389d | 1202 | return 0; |
85b4aa49 RL |
1203 | } |
1204 | ||
97c8389d | 1205 | if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) && |
3fe9a0ba | 1206 | fcoe_ctlr_els_send(&fcoe->ctlr, skb)) |
97c8389d JE |
1207 | return 0; |
1208 | ||
85b4aa49 RL |
1209 | sof = fr_sof(fp); |
1210 | eof = fr_eof(fp); | |
1211 | ||
4e57e1cb | 1212 | elen = sizeof(struct ethhdr); |
85b4aa49 RL |
1213 | hlen = sizeof(struct fcoe_hdr); |
1214 | tlen = sizeof(struct fcoe_crc_eof); | |
1215 | wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; | |
1216 | ||
1217 | /* crc offload */ | |
1218 | if (likely(lp->crc_offload)) { | |
39ca9a06 | 1219 | skb->ip_summed = CHECKSUM_PARTIAL; |
85b4aa49 RL |
1220 | skb->csum_start = skb_headroom(skb); |
1221 | skb->csum_offset = skb->len; | |
1222 | crc = 0; | |
1223 | } else { | |
1224 | skb->ip_summed = CHECKSUM_NONE; | |
1225 | crc = fcoe_fc_crc(fp); | |
1226 | } | |
1227 | ||
014f5c3f | 1228 | /* copy port crc and eof to the skb buff */ |
85b4aa49 RL |
1229 | if (skb_is_nonlinear(skb)) { |
1230 | skb_frag_t *frag; | |
1231 | if (fcoe_get_paged_crc_eof(skb, tlen)) { | |
e9041581 | 1232 | kfree_skb(skb); |
85b4aa49 RL |
1233 | return -ENOMEM; |
1234 | } | |
1235 | frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; | |
1236 | cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ) | |
1237 | + frag->page_offset; | |
1238 | } else { | |
1239 | cp = (struct fcoe_crc_eof *)skb_put(skb, tlen); | |
1240 | } | |
1241 | ||
1242 | memset(cp, 0, sizeof(*cp)); | |
1243 | cp->fcoe_eof = eof; | |
1244 | cp->fcoe_crc32 = cpu_to_le32(~crc); | |
1245 | ||
1246 | if (skb_is_nonlinear(skb)) { | |
1247 | kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ); | |
1248 | cp = NULL; | |
1249 | } | |
1250 | ||
014f5c3f | 1251 | /* adjust skb network/transport offsets to match mac/fcoe/port */ |
85b4aa49 RL |
1252 | skb_push(skb, elen + hlen); |
1253 | skb_reset_mac_header(skb); | |
1254 | skb_reset_network_header(skb); | |
1255 | skb->mac_len = elen; | |
211c738d | 1256 | skb->protocol = htons(ETH_P_FCOE); |
3fe9a0ba | 1257 | skb->dev = fcoe->netdev; |
85b4aa49 RL |
1258 | |
1259 | /* fill up mac and fcoe headers */ | |
1260 | eh = eth_hdr(skb); | |
1261 | eh->h_proto = htons(ETH_P_FCOE); | |
3fe9a0ba | 1262 | if (fcoe->ctlr.map_dest) |
85b4aa49 RL |
1263 | fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id); |
1264 | else | |
1265 | /* insert GW address */ | |
3fe9a0ba | 1266 | memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN); |
85b4aa49 | 1267 | |
3fe9a0ba CL |
1268 | if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN)) |
1269 | memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN); | |
85b4aa49 | 1270 | else |
3fe9a0ba | 1271 | memcpy(eh->h_source, fcoe->ctlr.data_src_addr, ETH_ALEN); |
85b4aa49 RL |
1272 | |
1273 | hp = (struct fcoe_hdr *)(eh + 1); | |
1274 | memset(hp, 0, sizeof(*hp)); | |
1275 | if (FC_FCOE_VER) | |
1276 | FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); | |
1277 | hp->fcoe_sof = sof; | |
1278 | ||
39ca9a06 YZ |
1279 | /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ |
1280 | if (lp->seq_offload && fr_max_payload(fp)) { | |
1281 | skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; | |
1282 | skb_shinfo(skb)->gso_size = fr_max_payload(fp); | |
1283 | } else { | |
1284 | skb_shinfo(skb)->gso_type = 0; | |
1285 | skb_shinfo(skb)->gso_size = 0; | |
1286 | } | |
85b4aa49 | 1287 | /* update tx stats: regardless if LLD fails */ |
582b45bc RL |
1288 | stats = fc_lport_get_stats(lp); |
1289 | stats->TxFrames++; | |
1290 | stats->TxWords += wlen; | |
85b4aa49 RL |
1291 | |
1292 | /* send down to lld */ | |
1293 | fr_dev(fp) = lp; | |
014f5c3f | 1294 | if (port->fcoe_pending_queue.qlen) |
4bb6b515 VD |
1295 | fcoe_check_wait_queue(lp, skb); |
1296 | else if (fcoe_start_io(skb)) | |
1297 | fcoe_check_wait_queue(lp, skb); | |
85b4aa49 RL |
1298 | |
1299 | return 0; | |
1300 | } | |
85b4aa49 | 1301 | |
34f42a07 RL |
1302 | /** |
1303 | * fcoe_percpu_receive_thread() - recv thread per cpu | |
85b4aa49 RL |
1304 | * @arg: ptr to the fcoe per cpu struct |
1305 | * | |
1306 | * Return: 0 for success | |
85b4aa49 RL |
1307 | */ |
1308 | int fcoe_percpu_receive_thread(void *arg) | |
1309 | { | |
1310 | struct fcoe_percpu_s *p = arg; | |
1311 | u32 fr_len; | |
1312 | struct fc_lport *lp; | |
1313 | struct fcoe_rcv_info *fr; | |
1314 | struct fcoe_dev_stats *stats; | |
1315 | struct fc_frame_header *fh; | |
1316 | struct sk_buff *skb; | |
1317 | struct fcoe_crc_eof crc_eof; | |
1318 | struct fc_frame *fp; | |
1319 | u8 *mac = NULL; | |
014f5c3f | 1320 | struct fcoe_port *port; |
85b4aa49 RL |
1321 | struct fcoe_hdr *hp; |
1322 | ||
4469c195 | 1323 | set_user_nice(current, -20); |
85b4aa49 RL |
1324 | |
1325 | while (!kthread_should_stop()) { | |
1326 | ||
1327 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1328 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) { | |
1329 | set_current_state(TASK_INTERRUPTIBLE); | |
1330 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1331 | schedule(); | |
1332 | set_current_state(TASK_RUNNING); | |
1333 | if (kthread_should_stop()) | |
1334 | return 0; | |
1335 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1336 | } | |
1337 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1338 | fr = fcoe_dev_from_skb(skb); | |
1339 | lp = fr->fr_dev; | |
1340 | if (unlikely(lp == NULL)) { | |
d5488eb9 | 1341 | FCOE_NETDEV_DBG(skb->dev, "Invalid HBA Structure"); |
85b4aa49 RL |
1342 | kfree_skb(skb); |
1343 | continue; | |
1344 | } | |
1345 | ||
d5488eb9 RL |
1346 | FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d " |
1347 | "head:%p data:%p tail:%p end:%p sum:%d dev:%s", | |
1348 | skb->len, skb->data_len, | |
1349 | skb->head, skb->data, skb_tail_pointer(skb), | |
1350 | skb_end_pointer(skb), skb->csum, | |
1351 | skb->dev ? skb->dev->name : "<NULL>"); | |
85b4aa49 RL |
1352 | |
1353 | /* | |
1354 | * Save source MAC address before discarding header. | |
1355 | */ | |
014f5c3f | 1356 | port = lport_priv(lp); |
85b4aa49 RL |
1357 | if (skb_is_nonlinear(skb)) |
1358 | skb_linearize(skb); /* not ideal */ | |
97c8389d | 1359 | mac = eth_hdr(skb)->h_source; |
85b4aa49 RL |
1360 | |
1361 | /* | |
1362 | * Frame length checks and setting up the header pointers | |
1363 | * was done in fcoe_rcv already. | |
1364 | */ | |
1365 | hp = (struct fcoe_hdr *) skb_network_header(skb); | |
1366 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1367 | ||
582b45bc | 1368 | stats = fc_lport_get_stats(lp); |
85b4aa49 | 1369 | if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { |
582b45bc | 1370 | if (stats->ErrorFrames < 5) |
d5488eb9 | 1371 | printk(KERN_WARNING "fcoe: FCoE version " |
582b45bc RL |
1372 | "mismatch: The frame has " |
1373 | "version %x, but the " | |
1374 | "initiator supports version " | |
1375 | "%x\n", FC_FCOE_DECAPS_VER(hp), | |
1376 | FC_FCOE_VER); | |
1377 | stats->ErrorFrames++; | |
85b4aa49 RL |
1378 | kfree_skb(skb); |
1379 | continue; | |
1380 | } | |
1381 | ||
1382 | skb_pull(skb, sizeof(struct fcoe_hdr)); | |
1383 | fr_len = skb->len - sizeof(struct fcoe_crc_eof); | |
1384 | ||
582b45bc RL |
1385 | stats->RxFrames++; |
1386 | stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; | |
85b4aa49 RL |
1387 | |
1388 | fp = (struct fc_frame *)skb; | |
1389 | fc_frame_init(fp); | |
1390 | fr_dev(fp) = lp; | |
1391 | fr_sof(fp) = hp->fcoe_sof; | |
1392 | ||
1393 | /* Copy out the CRC and EOF trailer for access */ | |
1394 | if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) { | |
1395 | kfree_skb(skb); | |
1396 | continue; | |
1397 | } | |
1398 | fr_eof(fp) = crc_eof.fcoe_eof; | |
1399 | fr_crc(fp) = crc_eof.fcoe_crc32; | |
1400 | if (pskb_trim(skb, fr_len)) { | |
1401 | kfree_skb(skb); | |
1402 | continue; | |
1403 | } | |
1404 | ||
1405 | /* | |
1406 | * We only check CRC if no offload is available and if it is | |
1407 | * it's solicited data, in which case, the FCP layer would | |
1408 | * check it during the copy. | |
1409 | */ | |
07c00ec4 | 1410 | if (lp->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY) |
85b4aa49 RL |
1411 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; |
1412 | else | |
1413 | fr_flags(fp) |= FCPHF_CRC_UNCHECKED; | |
1414 | ||
1415 | fh = fc_frame_header_get(fp); | |
1416 | if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && | |
1417 | fh->fh_type == FC_TYPE_FCP) { | |
52ff878c | 1418 | fc_exch_recv(lp, fp); |
85b4aa49 RL |
1419 | continue; |
1420 | } | |
1421 | if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) { | |
1422 | if (le32_to_cpu(fr_crc(fp)) != | |
1423 | ~crc32(~0, skb->data, fr_len)) { | |
d5488eb9 | 1424 | if (stats->InvalidCRCCount < 5) |
85b4aa49 RL |
1425 | printk(KERN_WARNING "fcoe: dropping " |
1426 | "frame with CRC error\n"); | |
1427 | stats->InvalidCRCCount++; | |
1428 | stats->ErrorFrames++; | |
1429 | fc_frame_free(fp); | |
1430 | continue; | |
1431 | } | |
1432 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; | |
1433 | } | |
3fe9a0ba CL |
1434 | if (unlikely(port->fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN) && |
1435 | fcoe_ctlr_recv_flogi(&port->fcoe->ctlr, fp, mac)) { | |
97c8389d JE |
1436 | fc_frame_free(fp); |
1437 | continue; | |
1438 | } | |
52ff878c | 1439 | fc_exch_recv(lp, fp); |
85b4aa49 RL |
1440 | } |
1441 | return 0; | |
1442 | } | |
1443 | ||
85b4aa49 | 1444 | /** |
dd3fd72e CL |
1445 | * fcoe_check_wait_queue() - attempt to clear the transmit backlog |
1446 | * @lp: the fc_lport | |
85b4aa49 RL |
1447 | * |
1448 | * This empties the wait_queue, dequeue the head of the wait_queue queue | |
1449 | * and calls fcoe_start_io() for each packet, if all skb have been | |
c826a314 | 1450 | * transmitted, return qlen or -1 if a error occurs, then restore |
dd3fd72e | 1451 | * wait_queue and try again later. |
85b4aa49 RL |
1452 | * |
1453 | * The wait_queue is used when the skb transmit fails. skb will go | |
dd3fd72e | 1454 | * in the wait_queue which will be emptied by the timer function or |
85b4aa49 | 1455 | * by the next skb transmit. |
34f42a07 | 1456 | */ |
4bb6b515 | 1457 | static void fcoe_check_wait_queue(struct fc_lport *lp, struct sk_buff *skb) |
85b4aa49 | 1458 | { |
014f5c3f | 1459 | struct fcoe_port *port = lport_priv(lp); |
4bb6b515 | 1460 | int rc; |
85b4aa49 | 1461 | |
014f5c3f | 1462 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
4bb6b515 VD |
1463 | |
1464 | if (skb) | |
014f5c3f | 1465 | __skb_queue_tail(&port->fcoe_pending_queue, skb); |
4bb6b515 | 1466 | |
014f5c3f | 1467 | if (port->fcoe_pending_queue_active) |
c826a314 | 1468 | goto out; |
014f5c3f | 1469 | port->fcoe_pending_queue_active = 1; |
55c8bafb | 1470 | |
014f5c3f | 1471 | while (port->fcoe_pending_queue.qlen) { |
55c8bafb | 1472 | /* keep qlen > 0 until fcoe_start_io succeeds */ |
014f5c3f CL |
1473 | port->fcoe_pending_queue.qlen++; |
1474 | skb = __skb_dequeue(&port->fcoe_pending_queue); | |
55c8bafb | 1475 | |
014f5c3f | 1476 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
55c8bafb | 1477 | rc = fcoe_start_io(skb); |
014f5c3f | 1478 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
55c8bafb CL |
1479 | |
1480 | if (rc) { | |
014f5c3f | 1481 | __skb_queue_head(&port->fcoe_pending_queue, skb); |
55c8bafb | 1482 | /* undo temporary increment above */ |
014f5c3f | 1483 | port->fcoe_pending_queue.qlen--; |
55c8bafb | 1484 | break; |
85b4aa49 | 1485 | } |
55c8bafb | 1486 | /* undo temporary increment above */ |
014f5c3f | 1487 | port->fcoe_pending_queue.qlen--; |
85b4aa49 | 1488 | } |
55c8bafb | 1489 | |
014f5c3f | 1490 | if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH) |
55c8bafb | 1491 | lp->qfull = 0; |
014f5c3f CL |
1492 | if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer)) |
1493 | mod_timer(&port->timer, jiffies + 2); | |
1494 | port->fcoe_pending_queue_active = 0; | |
c826a314 | 1495 | out: |
014f5c3f | 1496 | if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH) |
4bb6b515 | 1497 | lp->qfull = 1; |
014f5c3f | 1498 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
4bb6b515 | 1499 | return; |
85b4aa49 RL |
1500 | } |
1501 | ||
85b4aa49 | 1502 | /** |
34f42a07 RL |
1503 | * fcoe_dev_setup() - setup link change notification interface |
1504 | */ | |
b0d428ad | 1505 | static void fcoe_dev_setup(void) |
85b4aa49 | 1506 | { |
85b4aa49 RL |
1507 | register_netdevice_notifier(&fcoe_notifier); |
1508 | } | |
1509 | ||
1510 | /** | |
b0d428ad | 1511 | * fcoe_dev_cleanup() - cleanup link change notification interface |
34f42a07 | 1512 | */ |
85b4aa49 RL |
1513 | static void fcoe_dev_cleanup(void) |
1514 | { | |
1515 | unregister_netdevice_notifier(&fcoe_notifier); | |
1516 | } | |
1517 | ||
1518 | /** | |
34f42a07 | 1519 | * fcoe_device_notification() - netdev event notification callback |
85b4aa49 RL |
1520 | * @notifier: context of the notification |
1521 | * @event: type of event | |
1522 | * @ptr: fixed array for output parsed ifname | |
1523 | * | |
1524 | * This function is called by the ethernet driver in case of link change event | |
1525 | * | |
1526 | * Returns: 0 for success | |
34f42a07 | 1527 | */ |
85b4aa49 RL |
1528 | static int fcoe_device_notification(struct notifier_block *notifier, |
1529 | ulong event, void *ptr) | |
1530 | { | |
1531 | struct fc_lport *lp = NULL; | |
1d1b88dc | 1532 | struct net_device *netdev = ptr; |
014f5c3f | 1533 | struct fcoe_interface *fcoe; |
2e70e241 | 1534 | struct fcoe_port *port; |
85b4aa49 | 1535 | struct fcoe_dev_stats *stats; |
97c8389d | 1536 | u32 link_possible = 1; |
85b4aa49 RL |
1537 | u32 mfs; |
1538 | int rc = NOTIFY_OK; | |
1539 | ||
014f5c3f | 1540 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
25024989 | 1541 | if (fcoe->netdev == netdev) { |
3fe9a0ba | 1542 | lp = fcoe->ctlr.lp; |
85b4aa49 RL |
1543 | break; |
1544 | } | |
1545 | } | |
85b4aa49 RL |
1546 | if (lp == NULL) { |
1547 | rc = NOTIFY_DONE; | |
1548 | goto out; | |
1549 | } | |
1550 | ||
85b4aa49 RL |
1551 | switch (event) { |
1552 | case NETDEV_DOWN: | |
1553 | case NETDEV_GOING_DOWN: | |
97c8389d | 1554 | link_possible = 0; |
85b4aa49 RL |
1555 | break; |
1556 | case NETDEV_UP: | |
1557 | case NETDEV_CHANGE: | |
85b4aa49 RL |
1558 | break; |
1559 | case NETDEV_CHANGEMTU: | |
1d1b88dc VD |
1560 | mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + |
1561 | sizeof(struct fcoe_crc_eof)); | |
85b4aa49 RL |
1562 | if (mfs >= FC_MIN_MAX_FRAME) |
1563 | fc_set_mfs(lp, mfs); | |
85b4aa49 RL |
1564 | break; |
1565 | case NETDEV_REGISTER: | |
1566 | break; | |
2e70e241 CL |
1567 | case NETDEV_UNREGISTER: |
1568 | list_del(&fcoe->list); | |
1569 | port = lport_priv(fcoe->ctlr.lp); | |
1570 | fcoe_interface_cleanup(fcoe); | |
1571 | schedule_work(&port->destroy_work); | |
1572 | goto out; | |
1573 | break; | |
85b4aa49 | 1574 | default: |
1d1b88dc | 1575 | FCOE_NETDEV_DBG(netdev, "Unknown event %ld " |
d5488eb9 | 1576 | "from netdev netlink\n", event); |
85b4aa49 | 1577 | } |
97c8389d | 1578 | if (link_possible && !fcoe_link_ok(lp)) |
3fe9a0ba CL |
1579 | fcoe_ctlr_link_up(&fcoe->ctlr); |
1580 | else if (fcoe_ctlr_link_down(&fcoe->ctlr)) { | |
97c8389d JE |
1581 | stats = fc_lport_get_stats(lp); |
1582 | stats->LinkFailureCount++; | |
1583 | fcoe_clean_pending_queue(lp); | |
85b4aa49 RL |
1584 | } |
1585 | out: | |
1586 | return rc; | |
1587 | } | |
1588 | ||
1589 | /** | |
34f42a07 | 1590 | * fcoe_if_to_netdev() - parse a name buffer to get netdev |
85b4aa49 RL |
1591 | * @buffer: incoming buffer to be copied |
1592 | * | |
dd3fd72e | 1593 | * Returns: NULL or ptr to net_device |
34f42a07 | 1594 | */ |
85b4aa49 RL |
1595 | static struct net_device *fcoe_if_to_netdev(const char *buffer) |
1596 | { | |
1597 | char *cp; | |
1598 | char ifname[IFNAMSIZ + 2]; | |
1599 | ||
1600 | if (buffer) { | |
1601 | strlcpy(ifname, buffer, IFNAMSIZ); | |
1602 | cp = ifname + strlen(ifname); | |
1603 | while (--cp >= ifname && *cp == '\n') | |
1604 | *cp = '\0'; | |
1605 | return dev_get_by_name(&init_net, ifname); | |
1606 | } | |
1607 | return NULL; | |
1608 | } | |
1609 | ||
85b4aa49 | 1610 | /** |
34f42a07 | 1611 | * fcoe_destroy() - handles the destroy from sysfs |
dd3fd72e | 1612 | * @buffer: expected to be an eth if name |
85b4aa49 RL |
1613 | * @kp: associated kernel param |
1614 | * | |
1615 | * Returns: 0 for success | |
34f42a07 | 1616 | */ |
85b4aa49 RL |
1617 | static int fcoe_destroy(const char *buffer, struct kernel_param *kp) |
1618 | { | |
030f4e00 | 1619 | struct fcoe_interface *fcoe; |
2e70e241 | 1620 | struct net_device *netdev; |
af7f85d9 | 1621 | int rc; |
85b4aa49 | 1622 | |
dfc1d0fe CL |
1623 | mutex_lock(&fcoe_config_mutex); |
1624 | #ifdef CONFIG_FCOE_MODULE | |
1625 | /* | |
1626 | * Make sure the module has been initialized, and is not about to be | |
1627 | * removed. Module paramter sysfs files are writable before the | |
1628 | * module_init function is called and after module_exit. | |
1629 | */ | |
1630 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
1631 | rc = -ENODEV; | |
1632 | goto out_nodev; | |
1633 | } | |
1634 | #endif | |
1635 | ||
85b4aa49 RL |
1636 | netdev = fcoe_if_to_netdev(buffer); |
1637 | if (!netdev) { | |
1638 | rc = -ENODEV; | |
1639 | goto out_nodev; | |
1640 | } | |
2e70e241 | 1641 | |
090eb6c4 | 1642 | rtnl_lock(); |
2e70e241 CL |
1643 | fcoe = fcoe_hostlist_lookup_port(netdev); |
1644 | if (!fcoe) { | |
090eb6c4 | 1645 | rtnl_unlock(); |
85b4aa49 RL |
1646 | rc = -ENODEV; |
1647 | goto out_putdev; | |
1648 | } | |
2e70e241 | 1649 | list_del(&fcoe->list); |
2e70e241 CL |
1650 | fcoe_interface_cleanup(fcoe); |
1651 | rtnl_unlock(); | |
1652 | fcoe_if_destroy(fcoe->ctlr.lp); | |
85b4aa49 RL |
1653 | out_putdev: |
1654 | dev_put(netdev); | |
1655 | out_nodev: | |
dfc1d0fe | 1656 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 RL |
1657 | return rc; |
1658 | } | |
1659 | ||
2e70e241 CL |
1660 | static void fcoe_destroy_work(struct work_struct *work) |
1661 | { | |
1662 | struct fcoe_port *port; | |
1663 | ||
1664 | port = container_of(work, struct fcoe_port, destroy_work); | |
1665 | mutex_lock(&fcoe_config_mutex); | |
1666 | fcoe_if_destroy(port->lport); | |
1667 | mutex_unlock(&fcoe_config_mutex); | |
1668 | } | |
1669 | ||
85b4aa49 | 1670 | /** |
34f42a07 | 1671 | * fcoe_create() - Handles the create call from sysfs |
dd3fd72e | 1672 | * @buffer: expected to be an eth if name |
85b4aa49 RL |
1673 | * @kp: associated kernel param |
1674 | * | |
1675 | * Returns: 0 for success | |
34f42a07 | 1676 | */ |
85b4aa49 RL |
1677 | static int fcoe_create(const char *buffer, struct kernel_param *kp) |
1678 | { | |
1679 | int rc; | |
030f4e00 | 1680 | struct fcoe_interface *fcoe; |
af7f85d9 | 1681 | struct fc_lport *lport; |
85b4aa49 RL |
1682 | struct net_device *netdev; |
1683 | ||
dfc1d0fe CL |
1684 | mutex_lock(&fcoe_config_mutex); |
1685 | #ifdef CONFIG_FCOE_MODULE | |
1686 | /* | |
1687 | * Make sure the module has been initialized, and is not about to be | |
1688 | * removed. Module paramter sysfs files are writable before the | |
1689 | * module_init function is called and after module_exit. | |
1690 | */ | |
1691 | if (THIS_MODULE->state != MODULE_STATE_LIVE) { | |
1692 | rc = -ENODEV; | |
1693 | goto out_nodev; | |
1694 | } | |
1695 | #endif | |
1696 | ||
2e70e241 | 1697 | rtnl_lock(); |
85b4aa49 RL |
1698 | netdev = fcoe_if_to_netdev(buffer); |
1699 | if (!netdev) { | |
1700 | rc = -ENODEV; | |
1701 | goto out_nodev; | |
1702 | } | |
2e70e241 | 1703 | |
85b4aa49 RL |
1704 | /* look for existing lport */ |
1705 | if (fcoe_hostlist_lookup(netdev)) { | |
1706 | rc = -EEXIST; | |
1707 | goto out_putdev; | |
1708 | } | |
85b4aa49 | 1709 | |
030f4e00 CL |
1710 | fcoe = fcoe_interface_create(netdev); |
1711 | if (!fcoe) { | |
1712 | rc = -ENOMEM; | |
1713 | goto out_putdev; | |
1714 | } | |
1715 | ||
1716 | lport = fcoe_if_create(fcoe, &netdev->dev); | |
af7f85d9 | 1717 | if (IS_ERR(lport)) { |
d5488eb9 | 1718 | printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", |
85b4aa49 | 1719 | netdev->name); |
85b4aa49 | 1720 | rc = -EIO; |
2e70e241 | 1721 | fcoe_interface_cleanup(fcoe); |
030f4e00 | 1722 | goto out_free; |
85b4aa49 | 1723 | } |
030f4e00 | 1724 | |
54b649f8 CL |
1725 | /* Make this the "master" N_Port */ |
1726 | fcoe->ctlr.lp = lport; | |
1727 | ||
c863df33 CL |
1728 | /* add to lports list */ |
1729 | fcoe_hostlist_add(lport); | |
1730 | ||
54b649f8 CL |
1731 | /* start FIP Discovery and FLOGI */ |
1732 | lport->boot_time = jiffies; | |
1733 | fc_fabric_login(lport); | |
1734 | if (!fcoe_link_ok(lport)) | |
1735 | fcoe_ctlr_link_up(&fcoe->ctlr); | |
030f4e00 | 1736 | |
54b649f8 | 1737 | rc = 0; |
030f4e00 | 1738 | out_free: |
54b649f8 CL |
1739 | /* |
1740 | * Release from init in fcoe_interface_create(), on success lport | |
1741 | * should be holding a reference taken in fcoe_if_create(). | |
1742 | */ | |
030f4e00 | 1743 | fcoe_interface_put(fcoe); |
85b4aa49 RL |
1744 | out_putdev: |
1745 | dev_put(netdev); | |
1746 | out_nodev: | |
2e70e241 | 1747 | rtnl_unlock(); |
dfc1d0fe | 1748 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 RL |
1749 | return rc; |
1750 | } | |
1751 | ||
1752 | module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR); | |
1753 | __MODULE_PARM_TYPE(create, "string"); | |
014f5c3f | 1754 | MODULE_PARM_DESC(create, "Create fcoe fcoe using net device passed in."); |
85b4aa49 RL |
1755 | module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR); |
1756 | __MODULE_PARM_TYPE(destroy, "string"); | |
014f5c3f | 1757 | MODULE_PARM_DESC(destroy, "Destroy fcoe fcoe"); |
85b4aa49 | 1758 | |
34f42a07 RL |
1759 | /** |
1760 | * fcoe_link_ok() - Check if link is ok for the fc_lport | |
85b4aa49 RL |
1761 | * @lp: ptr to the fc_lport |
1762 | * | |
1763 | * Any permanently-disqualifying conditions have been previously checked. | |
1764 | * This also updates the speed setting, which may change with link for 100/1000. | |
1765 | * | |
1766 | * This function should probably be checking for PAUSE support at some point | |
1767 | * in the future. Currently Per-priority-pause is not determinable using | |
1768 | * ethtool, so we shouldn't be restrictive until that problem is resolved. | |
1769 | * | |
1770 | * Returns: 0 if link is OK for use by FCoE. | |
1771 | * | |
1772 | */ | |
1773 | int fcoe_link_ok(struct fc_lport *lp) | |
1774 | { | |
014f5c3f | 1775 | struct fcoe_port *port = lport_priv(lp); |
25024989 | 1776 | struct net_device *dev = port->fcoe->netdev; |
85b4aa49 | 1777 | struct ethtool_cmd ecmd = { ETHTOOL_GSET }; |
85b4aa49 | 1778 | |
2f718d64 YZ |
1779 | if ((dev->flags & IFF_UP) && netif_carrier_ok(dev) && |
1780 | (!dev_ethtool_get_settings(dev, &ecmd))) { | |
1781 | lp->link_supported_speeds &= | |
1782 | ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT); | |
1783 | if (ecmd.supported & (SUPPORTED_1000baseT_Half | | |
1784 | SUPPORTED_1000baseT_Full)) | |
1785 | lp->link_supported_speeds |= FC_PORTSPEED_1GBIT; | |
1786 | if (ecmd.supported & SUPPORTED_10000baseT_Full) | |
1787 | lp->link_supported_speeds |= | |
1788 | FC_PORTSPEED_10GBIT; | |
1789 | if (ecmd.speed == SPEED_1000) | |
1790 | lp->link_speed = FC_PORTSPEED_1GBIT; | |
1791 | if (ecmd.speed == SPEED_10000) | |
1792 | lp->link_speed = FC_PORTSPEED_10GBIT; | |
85b4aa49 | 1793 | |
2f718d64 YZ |
1794 | return 0; |
1795 | } | |
1796 | return -1; | |
85b4aa49 | 1797 | } |
85b4aa49 | 1798 | |
34f42a07 RL |
1799 | /** |
1800 | * fcoe_percpu_clean() - Clear the pending skbs for an lport | |
85b4aa49 RL |
1801 | * @lp: the fc_lport |
1802 | */ | |
1803 | void fcoe_percpu_clean(struct fc_lport *lp) | |
1804 | { | |
85b4aa49 RL |
1805 | struct fcoe_percpu_s *pp; |
1806 | struct fcoe_rcv_info *fr; | |
1807 | struct sk_buff_head *list; | |
1808 | struct sk_buff *skb, *next; | |
1809 | struct sk_buff *head; | |
5e5e92df | 1810 | unsigned int cpu; |
85b4aa49 | 1811 | |
5e5e92df RL |
1812 | for_each_possible_cpu(cpu) { |
1813 | pp = &per_cpu(fcoe_percpu, cpu); | |
1814 | spin_lock_bh(&pp->fcoe_rx_list.lock); | |
1815 | list = &pp->fcoe_rx_list; | |
1816 | head = list->next; | |
1817 | for (skb = head; skb != (struct sk_buff *)list; | |
1818 | skb = next) { | |
1819 | next = skb->next; | |
1820 | fr = fcoe_dev_from_skb(skb); | |
1821 | if (fr->fr_dev == lp) { | |
1822 | __skb_unlink(skb, list); | |
1823 | kfree_skb(skb); | |
85b4aa49 | 1824 | } |
85b4aa49 | 1825 | } |
5e5e92df | 1826 | spin_unlock_bh(&pp->fcoe_rx_list.lock); |
85b4aa49 RL |
1827 | } |
1828 | } | |
85b4aa49 RL |
1829 | |
1830 | /** | |
34f42a07 | 1831 | * fcoe_clean_pending_queue() - Dequeue a skb and free it |
85b4aa49 RL |
1832 | * @lp: the corresponding fc_lport |
1833 | * | |
1834 | * Returns: none | |
34f42a07 | 1835 | */ |
85b4aa49 RL |
1836 | void fcoe_clean_pending_queue(struct fc_lport *lp) |
1837 | { | |
014f5c3f | 1838 | struct fcoe_port *port = lport_priv(lp); |
85b4aa49 RL |
1839 | struct sk_buff *skb; |
1840 | ||
014f5c3f CL |
1841 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
1842 | while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) { | |
1843 | spin_unlock_bh(&port->fcoe_pending_queue.lock); | |
85b4aa49 | 1844 | kfree_skb(skb); |
014f5c3f | 1845 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
85b4aa49 | 1846 | } |
014f5c3f | 1847 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
85b4aa49 | 1848 | } |
85b4aa49 | 1849 | |
34f42a07 RL |
1850 | /** |
1851 | * fcoe_reset() - Resets the fcoe | |
85b4aa49 RL |
1852 | * @shost: shost the reset is from |
1853 | * | |
1854 | * Returns: always 0 | |
1855 | */ | |
1856 | int fcoe_reset(struct Scsi_Host *shost) | |
1857 | { | |
1858 | struct fc_lport *lport = shost_priv(shost); | |
1859 | fc_lport_reset(lport); | |
1860 | return 0; | |
1861 | } | |
85b4aa49 | 1862 | |
34f42a07 | 1863 | /** |
014f5c3f | 1864 | * fcoe_hostlist_lookup_port() - find the corresponding lport by a given device |
dd3fd72e | 1865 | * @dev: this is currently ptr to net_device |
85b4aa49 | 1866 | * |
014f5c3f | 1867 | * Returns: NULL or the located fcoe_port |
090eb6c4 | 1868 | * Locking: must be called with the RNL mutex held |
85b4aa49 | 1869 | */ |
014f5c3f CL |
1870 | static struct fcoe_interface * |
1871 | fcoe_hostlist_lookup_port(const struct net_device *dev) | |
85b4aa49 | 1872 | { |
014f5c3f | 1873 | struct fcoe_interface *fcoe; |
85b4aa49 | 1874 | |
014f5c3f | 1875 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
25024989 | 1876 | if (fcoe->netdev == dev) |
014f5c3f | 1877 | return fcoe; |
85b4aa49 | 1878 | } |
85b4aa49 RL |
1879 | return NULL; |
1880 | } | |
1881 | ||
34f42a07 RL |
1882 | /** |
1883 | * fcoe_hostlist_lookup() - Find the corresponding lport by netdev | |
85b4aa49 RL |
1884 | * @netdev: ptr to net_device |
1885 | * | |
1886 | * Returns: 0 for success | |
090eb6c4 | 1887 | * Locking: must be called with the RTNL mutex held |
85b4aa49 | 1888 | */ |
090eb6c4 | 1889 | static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) |
85b4aa49 | 1890 | { |
014f5c3f | 1891 | struct fcoe_interface *fcoe; |
85b4aa49 | 1892 | |
014f5c3f | 1893 | fcoe = fcoe_hostlist_lookup_port(netdev); |
3fe9a0ba | 1894 | return (fcoe) ? fcoe->ctlr.lp : NULL; |
85b4aa49 | 1895 | } |
85b4aa49 | 1896 | |
34f42a07 RL |
1897 | /** |
1898 | * fcoe_hostlist_add() - Add a lport to lports list | |
dd3fd72e | 1899 | * @lp: ptr to the fc_lport to be added |
85b4aa49 RL |
1900 | * |
1901 | * Returns: 0 for success | |
090eb6c4 | 1902 | * Locking: must be called with the RTNL mutex held |
85b4aa49 | 1903 | */ |
090eb6c4 | 1904 | static int fcoe_hostlist_add(const struct fc_lport *lport) |
85b4aa49 | 1905 | { |
014f5c3f CL |
1906 | struct fcoe_interface *fcoe; |
1907 | struct fcoe_port *port; | |
1908 | ||
1909 | fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); | |
1910 | if (!fcoe) { | |
1911 | port = lport_priv(lport); | |
1912 | fcoe = port->fcoe; | |
1913 | list_add_tail(&fcoe->list, &fcoe_hostlist); | |
85b4aa49 RL |
1914 | } |
1915 | return 0; | |
1916 | } | |
85b4aa49 | 1917 | |
85b4aa49 | 1918 | /** |
34f42a07 | 1919 | * fcoe_init() - fcoe module loading initialization |
85b4aa49 | 1920 | * |
85b4aa49 | 1921 | * Returns 0 on success, negative on failure |
34f42a07 | 1922 | */ |
85b4aa49 RL |
1923 | static int __init fcoe_init(void) |
1924 | { | |
38eccabd | 1925 | unsigned int cpu; |
8976f424 | 1926 | int rc = 0; |
85b4aa49 RL |
1927 | struct fcoe_percpu_s *p; |
1928 | ||
dfc1d0fe CL |
1929 | mutex_lock(&fcoe_config_mutex); |
1930 | ||
38eccabd | 1931 | for_each_possible_cpu(cpu) { |
5e5e92df | 1932 | p = &per_cpu(fcoe_percpu, cpu); |
38eccabd RL |
1933 | skb_queue_head_init(&p->fcoe_rx_list); |
1934 | } | |
1935 | ||
8976f424 RL |
1936 | for_each_online_cpu(cpu) |
1937 | fcoe_percpu_thread_create(cpu); | |
85b4aa49 | 1938 | |
8976f424 RL |
1939 | /* Initialize per CPU interrupt thread */ |
1940 | rc = register_hotcpu_notifier(&fcoe_cpu_notifier); | |
1941 | if (rc) | |
1942 | goto out_free; | |
85b4aa49 | 1943 | |
8976f424 | 1944 | /* Setup link change notification */ |
85b4aa49 RL |
1945 | fcoe_dev_setup(); |
1946 | ||
5892c32f CL |
1947 | rc = fcoe_if_init(); |
1948 | if (rc) | |
1949 | goto out_free; | |
85b4aa49 | 1950 | |
dfc1d0fe | 1951 | mutex_unlock(&fcoe_config_mutex); |
85b4aa49 | 1952 | return 0; |
8976f424 RL |
1953 | |
1954 | out_free: | |
1955 | for_each_online_cpu(cpu) { | |
1956 | fcoe_percpu_thread_destroy(cpu); | |
1957 | } | |
dfc1d0fe | 1958 | mutex_unlock(&fcoe_config_mutex); |
8976f424 | 1959 | return rc; |
85b4aa49 RL |
1960 | } |
1961 | module_init(fcoe_init); | |
1962 | ||
1963 | /** | |
34f42a07 | 1964 | * fcoe_exit() - fcoe module unloading cleanup |
85b4aa49 RL |
1965 | * |
1966 | * Returns 0 on success, negative on failure | |
34f42a07 | 1967 | */ |
85b4aa49 RL |
1968 | static void __exit fcoe_exit(void) |
1969 | { | |
5e5e92df | 1970 | unsigned int cpu; |
014f5c3f | 1971 | struct fcoe_interface *fcoe, *tmp; |
2e70e241 | 1972 | struct fcoe_port *port; |
85b4aa49 | 1973 | |
dfc1d0fe CL |
1974 | mutex_lock(&fcoe_config_mutex); |
1975 | ||
85b4aa49 RL |
1976 | fcoe_dev_cleanup(); |
1977 | ||
5919a595 | 1978 | /* releases the associated fcoe hosts */ |
090eb6c4 CL |
1979 | rtnl_lock(); |
1980 | list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { | |
c863df33 | 1981 | list_del(&fcoe->list); |
2e70e241 | 1982 | port = lport_priv(fcoe->ctlr.lp); |
2e70e241 | 1983 | fcoe_interface_cleanup(fcoe); |
2e70e241 | 1984 | schedule_work(&port->destroy_work); |
c863df33 | 1985 | } |
090eb6c4 | 1986 | rtnl_unlock(); |
85b4aa49 | 1987 | |
8976f424 RL |
1988 | unregister_hotcpu_notifier(&fcoe_cpu_notifier); |
1989 | ||
014f5c3f | 1990 | for_each_online_cpu(cpu) |
8976f424 | 1991 | fcoe_percpu_thread_destroy(cpu); |
85b4aa49 | 1992 | |
dfc1d0fe | 1993 | mutex_unlock(&fcoe_config_mutex); |
2e70e241 CL |
1994 | |
1995 | /* flush any asyncronous interface destroys, | |
1996 | * this should happen after the netdev notifier is unregistered */ | |
1997 | flush_scheduled_work(); | |
1998 | ||
1999 | /* detach from scsi transport | |
2000 | * must happen after all destroys are done, therefor after the flush */ | |
2001 | fcoe_if_exit(); | |
85b4aa49 RL |
2002 | } |
2003 | module_exit(fcoe_exit); |