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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 | ||
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 | ||
030f4e00 CL |
141 | /** |
142 | * fcoe_interface_create() | |
143 | * @netdev: network interface | |
144 | * | |
145 | * Returns: pointer to a struct fcoe_interface or NULL on error | |
146 | */ | |
147 | static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev) | |
148 | { | |
149 | struct fcoe_interface *fcoe; | |
150 | ||
151 | fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL); | |
152 | if (!fcoe) { | |
153 | FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n"); | |
154 | return NULL; | |
155 | } | |
156 | ||
157 | kref_init(&fcoe->kref); | |
158 | fcoe->netdev = netdev; | |
159 | ||
160 | return fcoe; | |
161 | } | |
162 | ||
163 | /** | |
164 | * fcoe_interface_release() - fcoe_port kref release function | |
165 | * @kref: embedded reference count in an fcoe_interface struct | |
166 | */ | |
167 | static void fcoe_interface_release(struct kref *kref) | |
168 | { | |
169 | struct fcoe_interface *fcoe; | |
170 | ||
171 | fcoe = container_of(kref, struct fcoe_interface, kref); | |
172 | kfree(fcoe); | |
173 | } | |
174 | ||
175 | /** | |
176 | * fcoe_interface_get() | |
177 | * @fcoe: | |
178 | */ | |
179 | static inline void fcoe_interface_get(struct fcoe_interface *fcoe) | |
180 | { | |
181 | kref_get(&fcoe->kref); | |
182 | } | |
183 | ||
184 | /** | |
185 | * fcoe_interface_put() | |
186 | * @fcoe: | |
187 | */ | |
188 | static inline void fcoe_interface_put(struct fcoe_interface *fcoe) | |
189 | { | |
190 | kref_put(&fcoe->kref, fcoe_interface_release); | |
191 | } | |
192 | ||
ab6b85c1 VD |
193 | /** |
194 | * fcoe_fip_recv - handle a received FIP frame. | |
195 | * @skb: the receive skb | |
196 | * @dev: associated &net_device | |
197 | * @ptype: the &packet_type structure which was used to register this handler. | |
198 | * @orig_dev: original receive &net_device, in case @dev is a bond. | |
199 | * | |
200 | * Returns: 0 for success | |
201 | */ | |
202 | static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *dev, | |
203 | struct packet_type *ptype, | |
204 | struct net_device *orig_dev) | |
205 | { | |
259ad85d | 206 | struct fcoe_interface *fcoe; |
ab6b85c1 | 207 | |
259ad85d | 208 | fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); |
3fe9a0ba | 209 | fcoe_ctlr_recv(&fcoe->ctlr, skb); |
ab6b85c1 VD |
210 | return 0; |
211 | } | |
212 | ||
213 | /** | |
214 | * fcoe_fip_send() - send an Ethernet-encapsulated FIP frame. | |
215 | * @fip: FCoE controller. | |
216 | * @skb: FIP Packet. | |
217 | */ | |
218 | static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
219 | { | |
3fe9a0ba | 220 | skb->dev = fcoe_from_ctlr(fip)->netdev; |
ab6b85c1 VD |
221 | dev_queue_xmit(skb); |
222 | } | |
223 | ||
224 | /** | |
225 | * fcoe_update_src_mac() - Update Ethernet MAC filters. | |
226 | * @fip: FCoE controller. | |
227 | * @old: Unicast MAC address to delete if the MAC is non-zero. | |
228 | * @new: Unicast MAC address to add. | |
229 | * | |
230 | * Remove any previously-set unicast MAC filter. | |
231 | * Add secondary FCoE MAC address filter for our OUI. | |
232 | */ | |
233 | static void fcoe_update_src_mac(struct fcoe_ctlr *fip, u8 *old, u8 *new) | |
234 | { | |
25024989 | 235 | struct fcoe_interface *fcoe; |
25024989 | 236 | |
3fe9a0ba | 237 | fcoe = fcoe_from_ctlr(fip); |
ab6b85c1 VD |
238 | rtnl_lock(); |
239 | if (!is_zero_ether_addr(old)) | |
25024989 CL |
240 | dev_unicast_delete(fcoe->netdev, old); |
241 | dev_unicast_add(fcoe->netdev, new); | |
ab6b85c1 VD |
242 | rtnl_unlock(); |
243 | } | |
244 | ||
7f349142 VD |
245 | /** |
246 | * fcoe_lport_config() - sets up the fc_lport | |
247 | * @lp: ptr to the fc_lport | |
7f349142 VD |
248 | * |
249 | * Returns: 0 for success | |
250 | */ | |
251 | static int fcoe_lport_config(struct fc_lport *lp) | |
252 | { | |
253 | lp->link_up = 0; | |
254 | lp->qfull = 0; | |
255 | lp->max_retry_count = 3; | |
a3666955 | 256 | lp->max_rport_retry_count = 3; |
7f349142 VD |
257 | lp->e_d_tov = 2 * 1000; /* FC-FS default */ |
258 | lp->r_a_tov = 2 * 2 * 1000; | |
259 | lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | | |
260 | FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); | |
261 | ||
262 | fc_lport_init_stats(lp); | |
263 | ||
264 | /* lport fc_lport related configuration */ | |
265 | fc_lport_config(lp); | |
266 | ||
267 | /* offload related configuration */ | |
268 | lp->crc_offload = 0; | |
269 | lp->seq_offload = 0; | |
270 | lp->lro_enabled = 0; | |
271 | lp->lro_xid = 0; | |
272 | lp->lso_max = 0; | |
273 | ||
274 | return 0; | |
275 | } | |
276 | ||
ab6b85c1 VD |
277 | /** |
278 | * fcoe_netdev_cleanup() - clean up netdev configurations | |
014f5c3f | 279 | * @port: ptr to the fcoe_port |
ab6b85c1 | 280 | */ |
014f5c3f | 281 | void fcoe_netdev_cleanup(struct fcoe_port *port) |
ab6b85c1 VD |
282 | { |
283 | u8 flogi_maddr[ETH_ALEN]; | |
25024989 | 284 | struct fcoe_interface *fcoe = port->fcoe; |
ab6b85c1 VD |
285 | |
286 | /* Don't listen for Ethernet packets anymore */ | |
259ad85d CL |
287 | dev_remove_pack(&fcoe->fcoe_packet_type); |
288 | dev_remove_pack(&fcoe->fip_packet_type); | |
ab6b85c1 VD |
289 | |
290 | /* Delete secondary MAC addresses */ | |
291 | rtnl_lock(); | |
292 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); | |
25024989 | 293 | dev_unicast_delete(fcoe->netdev, flogi_maddr); |
3fe9a0ba CL |
294 | if (!is_zero_ether_addr(fcoe->ctlr.data_src_addr)) |
295 | dev_unicast_delete(fcoe->netdev, fcoe->ctlr.data_src_addr); | |
296 | if (fcoe->ctlr.spma) | |
297 | dev_unicast_delete(fcoe->netdev, fcoe->ctlr.ctl_src_addr); | |
25024989 | 298 | dev_mc_delete(fcoe->netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0); |
ab6b85c1 VD |
299 | rtnl_unlock(); |
300 | } | |
301 | ||
1047f221 VD |
302 | /** |
303 | * fcoe_queue_timer() - fcoe queue timer | |
304 | * @lp: the fc_lport pointer | |
305 | * | |
306 | * Calls fcoe_check_wait_queue on timeout | |
307 | * | |
308 | */ | |
309 | static void fcoe_queue_timer(ulong lp) | |
310 | { | |
311 | fcoe_check_wait_queue((struct fc_lport *)lp, NULL); | |
312 | } | |
313 | ||
7f349142 VD |
314 | /** |
315 | * fcoe_netdev_config() - Set up netdev for SW FCoE | |
316 | * @lp : ptr to the fc_lport | |
317 | * @netdev : ptr to the associated netdevice struct | |
318 | * | |
319 | * Must be called after fcoe_lport_config() as it will use lport mutex | |
320 | * | |
321 | * Returns : 0 for success | |
322 | */ | |
323 | static int fcoe_netdev_config(struct fc_lport *lp, struct net_device *netdev) | |
324 | { | |
325 | u32 mfs; | |
326 | u64 wwnn, wwpn; | |
25024989 | 327 | struct fcoe_interface *fcoe; |
014f5c3f | 328 | struct fcoe_port *port; |
7f349142 | 329 | u8 flogi_maddr[ETH_ALEN]; |
184dd345 | 330 | struct netdev_hw_addr *ha; |
7f349142 VD |
331 | |
332 | /* Setup lport private data to point to fcoe softc */ | |
014f5c3f | 333 | port = lport_priv(lp); |
25024989 | 334 | fcoe = port->fcoe; |
3fe9a0ba | 335 | fcoe->ctlr.lp = lp; |
25024989 | 336 | fcoe->netdev = netdev; |
7f349142 VD |
337 | |
338 | /* Do not support for bonding device */ | |
1d1b88dc VD |
339 | if ((netdev->priv_flags & IFF_MASTER_ALB) || |
340 | (netdev->priv_flags & IFF_SLAVE_INACTIVE) || | |
341 | (netdev->priv_flags & IFF_MASTER_8023AD)) { | |
7f349142 VD |
342 | return -EOPNOTSUPP; |
343 | } | |
344 | ||
345 | /* | |
346 | * Determine max frame size based on underlying device and optional | |
347 | * user-configured limit. If the MFS is too low, fcoe_link_ok() | |
348 | * will return 0, so do this first. | |
349 | */ | |
1d1b88dc VD |
350 | mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + |
351 | sizeof(struct fcoe_crc_eof)); | |
7f349142 VD |
352 | if (fc_set_mfs(lp, mfs)) |
353 | return -EINVAL; | |
354 | ||
7f349142 | 355 | /* offload features support */ |
1d1b88dc | 356 | if (netdev->features & NETIF_F_SG) |
7f349142 VD |
357 | lp->sg_supp = 1; |
358 | ||
7f349142 VD |
359 | if (netdev->features & NETIF_F_FCOE_CRC) { |
360 | lp->crc_offload = 1; | |
d5488eb9 | 361 | FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); |
7f349142 | 362 | } |
7f349142 VD |
363 | if (netdev->features & NETIF_F_FSO) { |
364 | lp->seq_offload = 1; | |
365 | lp->lso_max = netdev->gso_max_size; | |
d5488eb9 RL |
366 | FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", |
367 | lp->lso_max); | |
7f349142 | 368 | } |
7f349142 VD |
369 | if (netdev->fcoe_ddp_xid) { |
370 | lp->lro_enabled = 1; | |
371 | lp->lro_xid = netdev->fcoe_ddp_xid; | |
d5488eb9 RL |
372 | FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", |
373 | lp->lro_xid); | |
7f349142 | 374 | } |
014f5c3f CL |
375 | skb_queue_head_init(&port->fcoe_pending_queue); |
376 | port->fcoe_pending_queue_active = 0; | |
377 | setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lp); | |
7f349142 | 378 | |
184dd345 VD |
379 | /* look for SAN MAC address, if multiple SAN MACs exist, only |
380 | * use the first one for SPMA */ | |
381 | rcu_read_lock(); | |
382 | for_each_dev_addr(netdev, ha) { | |
383 | if ((ha->type == NETDEV_HW_ADDR_T_SAN) && | |
3fe9a0ba CL |
384 | (is_valid_ether_addr(fcoe->ctlr.ctl_src_addr))) { |
385 | memcpy(fcoe->ctlr.ctl_src_addr, ha->addr, ETH_ALEN); | |
386 | fcoe->ctlr.spma = 1; | |
184dd345 VD |
387 | break; |
388 | } | |
389 | } | |
390 | rcu_read_unlock(); | |
391 | ||
7f349142 | 392 | /* setup Source Mac Address */ |
3fe9a0ba CL |
393 | if (!fcoe->ctlr.spma) |
394 | memcpy(fcoe->ctlr.ctl_src_addr, netdev->dev_addr, | |
014f5c3f | 395 | netdev->addr_len); |
7f349142 | 396 | |
1d1b88dc | 397 | wwnn = fcoe_wwn_from_mac(netdev->dev_addr, 1, 0); |
7f349142 VD |
398 | fc_set_wwnn(lp, wwnn); |
399 | /* XXX - 3rd arg needs to be vlan id */ | |
1d1b88dc | 400 | wwpn = fcoe_wwn_from_mac(netdev->dev_addr, 2, 0); |
7f349142 VD |
401 | fc_set_wwpn(lp, wwpn); |
402 | ||
403 | /* | |
404 | * Add FCoE MAC address as second unicast MAC address | |
405 | * or enter promiscuous mode if not capable of listening | |
406 | * for multiple unicast MACs. | |
407 | */ | |
408 | rtnl_lock(); | |
409 | memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); | |
1d1b88dc | 410 | dev_unicast_add(netdev, flogi_maddr); |
3fe9a0ba CL |
411 | if (fcoe->ctlr.spma) |
412 | dev_unicast_add(netdev, fcoe->ctlr.ctl_src_addr); | |
1d1b88dc | 413 | dev_mc_add(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0); |
7f349142 VD |
414 | rtnl_unlock(); |
415 | ||
416 | /* | |
417 | * setup the receive function from ethernet driver | |
418 | * on the ethertype for the given device | |
419 | */ | |
259ad85d CL |
420 | fcoe->fcoe_packet_type.func = fcoe_rcv; |
421 | fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE); | |
422 | fcoe->fcoe_packet_type.dev = netdev; | |
423 | dev_add_pack(&fcoe->fcoe_packet_type); | |
7f349142 | 424 | |
259ad85d CL |
425 | fcoe->fip_packet_type.func = fcoe_fip_recv; |
426 | fcoe->fip_packet_type.type = htons(ETH_P_FIP); | |
427 | fcoe->fip_packet_type.dev = netdev; | |
428 | dev_add_pack(&fcoe->fip_packet_type); | |
ab6b85c1 | 429 | |
7f349142 VD |
430 | return 0; |
431 | } | |
432 | ||
433 | /** | |
434 | * fcoe_shost_config() - Sets up fc_lport->host | |
435 | * @lp : ptr to the fc_lport | |
436 | * @shost : ptr to the associated scsi host | |
437 | * @dev : device associated to scsi host | |
438 | * | |
439 | * Must be called after fcoe_lport_config() and fcoe_netdev_config() | |
440 | * | |
441 | * Returns : 0 for success | |
442 | */ | |
443 | static int fcoe_shost_config(struct fc_lport *lp, struct Scsi_Host *shost, | |
444 | struct device *dev) | |
445 | { | |
446 | int rc = 0; | |
447 | ||
448 | /* lport scsi host config */ | |
449 | lp->host = shost; | |
450 | ||
451 | lp->host->max_lun = FCOE_MAX_LUN; | |
452 | lp->host->max_id = FCOE_MAX_FCP_TARGET; | |
453 | lp->host->max_channel = 0; | |
454 | lp->host->transportt = scsi_transport_fcoe_sw; | |
455 | ||
456 | /* add the new host to the SCSI-ml */ | |
457 | rc = scsi_add_host(lp->host, dev); | |
458 | if (rc) { | |
d5488eb9 RL |
459 | FCOE_NETDEV_DBG(fcoe_netdev(lp), "fcoe_shost_config: " |
460 | "error on scsi_add_host\n"); | |
7f349142 VD |
461 | return rc; |
462 | } | |
463 | sprintf(fc_host_symbolic_name(lp->host), "%s v%s over %s", | |
464 | FCOE_NAME, FCOE_VERSION, | |
465 | fcoe_netdev(lp)->name); | |
466 | ||
467 | return 0; | |
468 | } | |
469 | ||
d7179680 VD |
470 | /* |
471 | * fcoe_oem_match() - match for read types IO | |
472 | * @fp: the fc_frame for new IO. | |
473 | * | |
474 | * Returns : true for read types IO, otherwise returns false. | |
475 | */ | |
476 | bool fcoe_oem_match(struct fc_frame *fp) | |
477 | { | |
05cc7390 YZ |
478 | return fc_fcp_is_read(fr_fsp(fp)) && |
479 | (fr_fsp(fp)->data_len > fcoe_ddp_min); | |
d7179680 VD |
480 | } |
481 | ||
7f349142 VD |
482 | /** |
483 | * fcoe_em_config() - allocates em for this lport | |
014f5c3f | 484 | * @lp: the fcoe that em is to allocated for |
7f349142 | 485 | * |
e8af4d43 VD |
486 | * Called with write fcoe_hostlist_lock held. |
487 | * | |
7f349142 VD |
488 | * Returns : 0 on success |
489 | */ | |
490 | static inline int fcoe_em_config(struct fc_lport *lp) | |
491 | { | |
014f5c3f | 492 | struct fcoe_port *port = lport_priv(lp); |
25024989 CL |
493 | struct fcoe_interface *fcoe = port->fcoe; |
494 | struct fcoe_interface *oldfcoe = NULL; | |
1d1b88dc | 495 | struct net_device *old_real_dev, *cur_real_dev; |
d7179680 VD |
496 | u16 min_xid = FCOE_MIN_XID; |
497 | u16 max_xid = FCOE_MAX_XID; | |
498 | ||
499 | /* | |
500 | * Check if need to allocate an em instance for | |
501 | * offload exchange ids to be shared across all VN_PORTs/lport. | |
502 | */ | |
503 | if (!lp->lro_enabled || !lp->lro_xid || (lp->lro_xid >= max_xid)) { | |
504 | lp->lro_xid = 0; | |
505 | goto skip_oem; | |
506 | } | |
507 | ||
508 | /* | |
509 | * Reuse existing offload em instance in case | |
1d1b88dc | 510 | * it is already allocated on real eth device |
d7179680 | 511 | */ |
25024989 CL |
512 | if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
513 | cur_real_dev = vlan_dev_real_dev(fcoe->netdev); | |
1d1b88dc | 514 | else |
25024989 | 515 | cur_real_dev = fcoe->netdev; |
1d1b88dc | 516 | |
25024989 | 517 | list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { |
25024989 CL |
518 | if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN) |
519 | old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); | |
1d1b88dc | 520 | else |
25024989 | 521 | old_real_dev = oldfcoe->netdev; |
1d1b88dc VD |
522 | |
523 | if (cur_real_dev == old_real_dev) { | |
991cbb60 | 524 | fcoe->oem = oldfcoe->oem; |
d7179680 VD |
525 | break; |
526 | } | |
527 | } | |
528 | ||
991cbb60 CL |
529 | if (fcoe->oem) { |
530 | if (!fc_exch_mgr_add(lp, fcoe->oem, fcoe_oem_match)) { | |
d7179680 VD |
531 | printk(KERN_ERR "fcoe_em_config: failed to add " |
532 | "offload em:%p on interface:%s\n", | |
991cbb60 | 533 | fcoe->oem, fcoe->netdev->name); |
d7179680 VD |
534 | return -ENOMEM; |
535 | } | |
536 | } else { | |
991cbb60 | 537 | fcoe->oem = fc_exch_mgr_alloc(lp, FC_CLASS_3, |
d7179680 VD |
538 | FCOE_MIN_XID, lp->lro_xid, |
539 | fcoe_oem_match); | |
991cbb60 | 540 | if (!fcoe->oem) { |
d7179680 VD |
541 | printk(KERN_ERR "fcoe_em_config: failed to allocate " |
542 | "em for offload exches on interface:%s\n", | |
25024989 | 543 | fcoe->netdev->name); |
d7179680 VD |
544 | return -ENOMEM; |
545 | } | |
546 | } | |
547 | ||
548 | /* | |
549 | * Exclude offload EM xid range from next EM xid range. | |
550 | */ | |
551 | min_xid += lp->lro_xid + 1; | |
552 | ||
553 | skip_oem: | |
554 | if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, min_xid, max_xid, NULL)) { | |
555 | printk(KERN_ERR "fcoe_em_config: failed to " | |
25024989 | 556 | "allocate em on interface %s\n", fcoe->netdev->name); |
7f349142 | 557 | return -ENOMEM; |
d7179680 | 558 | } |
7f349142 VD |
559 | |
560 | return 0; | |
561 | } | |
562 | ||
563 | /** | |
564 | * fcoe_if_destroy() - FCoE software HBA tear-down function | |
af7f85d9 | 565 | * @lport: fc_lport to destroy |
7f349142 | 566 | */ |
af7f85d9 | 567 | static void fcoe_if_destroy(struct fc_lport *lport) |
7f349142 | 568 | { |
014f5c3f CL |
569 | struct fcoe_port *port = lport_priv(lport); |
570 | struct fcoe_interface *fcoe = port->fcoe; | |
25024989 | 571 | struct net_device *netdev = fcoe->netdev; |
7f349142 | 572 | |
d5488eb9 | 573 | FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); |
7f349142 | 574 | |
7f349142 | 575 | /* Logout of the fabric */ |
af7f85d9 | 576 | fc_fabric_logoff(lport); |
7f349142 VD |
577 | |
578 | /* Remove the instance from fcoe's list */ | |
af7f85d9 | 579 | fcoe_hostlist_remove(lport); |
7f349142 | 580 | |
ab6b85c1 | 581 | /* clean up netdev configurations */ |
014f5c3f | 582 | fcoe_netdev_cleanup(port); |
ab6b85c1 VD |
583 | |
584 | /* tear-down the FCoE controller */ | |
3fe9a0ba | 585 | fcoe_ctlr_destroy(&fcoe->ctlr); |
7f349142 | 586 | |
f161fb72 | 587 | /* Free queued packets for the per-CPU receive threads */ |
af7f85d9 | 588 | fcoe_percpu_clean(lport); |
f161fb72 | 589 | |
7f349142 | 590 | /* Cleanup the fc_lport */ |
af7f85d9 CL |
591 | fc_lport_destroy(lport); |
592 | fc_fcp_destroy(lport); | |
7f349142 VD |
593 | |
594 | /* Detach from the scsi-ml */ | |
af7f85d9 CL |
595 | fc_remove_host(lport->host); |
596 | scsi_remove_host(lport->host); | |
7f349142 VD |
597 | |
598 | /* There are no more rports or I/O, free the EM */ | |
af7f85d9 | 599 | fc_exch_mgr_free(lport); |
7f349142 | 600 | |
7f349142 | 601 | /* Free existing skbs */ |
af7f85d9 | 602 | fcoe_clean_pending_queue(lport); |
7f349142 | 603 | |
1047f221 | 604 | /* Stop the timer */ |
014f5c3f | 605 | del_timer_sync(&port->timer); |
1047f221 | 606 | |
7f349142 | 607 | /* Free memory used by statistical counters */ |
af7f85d9 | 608 | fc_lport_free_stats(lport); |
7f349142 VD |
609 | |
610 | /* Release the net_device and Scsi_Host */ | |
1d1b88dc | 611 | dev_put(netdev); |
af7f85d9 | 612 | scsi_host_put(lport->host); |
030f4e00 | 613 | fcoe_interface_put(fcoe); |
7f349142 VD |
614 | } |
615 | ||
616 | /* | |
617 | * fcoe_ddp_setup - calls LLD's ddp_setup through net_device | |
618 | * @lp: the corresponding fc_lport | |
619 | * @xid: the exchange id for this ddp transfer | |
620 | * @sgl: the scatterlist describing this transfer | |
621 | * @sgc: number of sg items | |
622 | * | |
623 | * Returns : 0 no ddp | |
624 | */ | |
625 | static int fcoe_ddp_setup(struct fc_lport *lp, u16 xid, | |
626 | struct scatterlist *sgl, unsigned int sgc) | |
627 | { | |
628 | struct net_device *n = fcoe_netdev(lp); | |
629 | ||
630 | if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_setup) | |
631 | return n->netdev_ops->ndo_fcoe_ddp_setup(n, xid, sgl, sgc); | |
632 | ||
633 | return 0; | |
634 | } | |
635 | ||
636 | /* | |
637 | * fcoe_ddp_done - calls LLD's ddp_done through net_device | |
638 | * @lp: the corresponding fc_lport | |
639 | * @xid: the exchange id for this ddp transfer | |
640 | * | |
641 | * Returns : the length of data that have been completed by ddp | |
642 | */ | |
643 | static int fcoe_ddp_done(struct fc_lport *lp, u16 xid) | |
644 | { | |
645 | struct net_device *n = fcoe_netdev(lp); | |
646 | ||
647 | if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_done) | |
648 | return n->netdev_ops->ndo_fcoe_ddp_done(n, xid); | |
649 | return 0; | |
650 | } | |
651 | ||
652 | static struct libfc_function_template fcoe_libfc_fcn_templ = { | |
653 | .frame_send = fcoe_xmit, | |
654 | .ddp_setup = fcoe_ddp_setup, | |
655 | .ddp_done = fcoe_ddp_done, | |
656 | }; | |
657 | ||
658 | /** | |
030f4e00 CL |
659 | * fcoe_if_create() - this function creates the fcoe port |
660 | * @fcoe: fcoe_interface structure to create an fc_lport instance on | |
af7f85d9 | 661 | * @parent: device pointer to be the parent in sysfs for the SCSI host |
7f349142 VD |
662 | * |
663 | * Creates fc_lport struct and scsi_host for lport, configures lport | |
664 | * and starts fabric login. | |
665 | * | |
af7f85d9 | 666 | * Returns : The allocated fc_lport or an error pointer |
7f349142 | 667 | */ |
030f4e00 | 668 | static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, |
af7f85d9 | 669 | struct device *parent) |
7f349142 VD |
670 | { |
671 | int rc; | |
af7f85d9 | 672 | struct fc_lport *lport = NULL; |
014f5c3f | 673 | struct fcoe_port *port; |
7f349142 | 674 | struct Scsi_Host *shost; |
030f4e00 | 675 | struct net_device *netdev = fcoe->netdev; |
7f349142 | 676 | |
d5488eb9 | 677 | FCOE_NETDEV_DBG(netdev, "Create Interface\n"); |
7f349142 | 678 | |
a0a25da2 | 679 | shost = libfc_host_alloc(&fcoe_shost_template, |
014f5c3f | 680 | sizeof(struct fcoe_port)); |
7f349142 | 681 | if (!shost) { |
d5488eb9 | 682 | FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); |
af7f85d9 | 683 | rc = -ENOMEM; |
030f4e00 | 684 | goto out; |
7f349142 | 685 | } |
af7f85d9 | 686 | lport = shost_priv(shost); |
014f5c3f | 687 | port = lport_priv(lport); |
014f5c3f | 688 | port->fcoe = fcoe; |
7f349142 VD |
689 | |
690 | /* configure fc_lport, e.g., em */ | |
af7f85d9 | 691 | rc = fcoe_lport_config(lport); |
7f349142 | 692 | if (rc) { |
d5488eb9 RL |
693 | FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " |
694 | "interface\n"); | |
7f349142 VD |
695 | goto out_host_put; |
696 | } | |
697 | ||
97c8389d JE |
698 | /* |
699 | * Initialize FIP. | |
700 | */ | |
3fe9a0ba CL |
701 | fcoe_ctlr_init(&fcoe->ctlr); |
702 | fcoe->ctlr.send = fcoe_fip_send; | |
703 | fcoe->ctlr.update_mac = fcoe_update_src_mac; | |
97c8389d | 704 | |
ab6b85c1 | 705 | /* configure lport network properties */ |
af7f85d9 | 706 | rc = fcoe_netdev_config(lport, netdev); |
ab6b85c1 | 707 | if (rc) { |
d5488eb9 RL |
708 | FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " |
709 | "interface\n"); | |
ab6b85c1 VD |
710 | goto out_netdev_cleanup; |
711 | } | |
97c8389d | 712 | |
7f349142 | 713 | /* configure lport scsi host properties */ |
af7f85d9 | 714 | rc = fcoe_shost_config(lport, shost, parent); |
7f349142 | 715 | if (rc) { |
d5488eb9 RL |
716 | FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " |
717 | "interface\n"); | |
ab6b85c1 | 718 | goto out_netdev_cleanup; |
7f349142 VD |
719 | } |
720 | ||
96316099 | 721 | /* Initialize the library */ |
af7f85d9 | 722 | rc = fcoe_libfc_config(lport, &fcoe_libfc_fcn_templ); |
7f349142 | 723 | if (rc) { |
96316099 | 724 | FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " |
d5488eb9 | 725 | "interface\n"); |
96316099 | 726 | goto out_lp_destroy; |
7f349142 VD |
727 | } |
728 | ||
e8af4d43 VD |
729 | /* |
730 | * fcoe_em_alloc() and fcoe_hostlist_add() both | |
731 | * need to be atomic under fcoe_hostlist_lock | |
732 | * since fcoe_em_alloc() looks for an existing EM | |
733 | * instance on host list updated by fcoe_hostlist_add(). | |
734 | */ | |
735 | write_lock(&fcoe_hostlist_lock); | |
96316099 | 736 | /* lport exch manager allocation */ |
af7f85d9 | 737 | rc = fcoe_em_config(lport); |
7f349142 | 738 | if (rc) { |
96316099 | 739 | FCOE_NETDEV_DBG(netdev, "Could not configure the EM for the " |
d5488eb9 | 740 | "interface\n"); |
7f349142 VD |
741 | goto out_lp_destroy; |
742 | } | |
743 | ||
744 | /* add to lports list */ | |
af7f85d9 | 745 | fcoe_hostlist_add(lport); |
e8af4d43 | 746 | write_unlock(&fcoe_hostlist_lock); |
7f349142 | 747 | |
af7f85d9 | 748 | lport->boot_time = jiffies; |
7f349142 | 749 | |
af7f85d9 | 750 | fc_fabric_login(lport); |
7f349142 | 751 | |
af7f85d9 | 752 | if (!fcoe_link_ok(lport)) |
3fe9a0ba | 753 | fcoe_ctlr_link_up(&fcoe->ctlr); |
97c8389d | 754 | |
7f349142 | 755 | dev_hold(netdev); |
030f4e00 | 756 | fcoe_interface_get(fcoe); |
af7f85d9 | 757 | return lport; |
7f349142 VD |
758 | |
759 | out_lp_destroy: | |
af7f85d9 | 760 | fc_exch_mgr_free(lport); |
ab6b85c1 | 761 | out_netdev_cleanup: |
014f5c3f | 762 | fcoe_netdev_cleanup(port); |
7f349142 | 763 | out_host_put: |
af7f85d9 CL |
764 | scsi_host_put(lport->host); |
765 | out: | |
766 | return ERR_PTR(rc); | |
7f349142 VD |
767 | } |
768 | ||
769 | /** | |
770 | * fcoe_if_init() - attach to scsi transport | |
771 | * | |
772 | * Returns : 0 on success | |
773 | */ | |
774 | static int __init fcoe_if_init(void) | |
775 | { | |
776 | /* attach to scsi transport */ | |
777 | scsi_transport_fcoe_sw = | |
778 | fc_attach_transport(&fcoe_transport_function); | |
779 | ||
780 | if (!scsi_transport_fcoe_sw) { | |
d5488eb9 | 781 | printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); |
7f349142 VD |
782 | return -ENODEV; |
783 | } | |
784 | ||
785 | return 0; | |
786 | } | |
787 | ||
788 | /** | |
789 | * fcoe_if_exit() - detach from scsi transport | |
790 | * | |
791 | * Returns : 0 on success | |
792 | */ | |
793 | int __exit fcoe_if_exit(void) | |
794 | { | |
795 | fc_release_transport(scsi_transport_fcoe_sw); | |
796 | return 0; | |
797 | } | |
798 | ||
8976f424 RL |
799 | /** |
800 | * fcoe_percpu_thread_create() - Create a receive thread for an online cpu | |
801 | * @cpu: cpu index for the online cpu | |
802 | */ | |
803 | static void fcoe_percpu_thread_create(unsigned int cpu) | |
804 | { | |
805 | struct fcoe_percpu_s *p; | |
806 | struct task_struct *thread; | |
807 | ||
808 | p = &per_cpu(fcoe_percpu, cpu); | |
809 | ||
810 | thread = kthread_create(fcoe_percpu_receive_thread, | |
811 | (void *)p, "fcoethread/%d", cpu); | |
812 | ||
813 | if (likely(!IS_ERR(p->thread))) { | |
814 | kthread_bind(thread, cpu); | |
815 | wake_up_process(thread); | |
816 | ||
817 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
818 | p->thread = thread; | |
819 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
820 | } | |
821 | } | |
822 | ||
823 | /** | |
824 | * fcoe_percpu_thread_destroy() - removes the rx thread for the given cpu | |
825 | * @cpu: cpu index the rx thread is to be removed | |
826 | * | |
827 | * Destroys a per-CPU Rx thread. Any pending skbs are moved to the | |
828 | * current CPU's Rx thread. If the thread being destroyed is bound to | |
829 | * the CPU processing this context the skbs will be freed. | |
830 | */ | |
831 | static void fcoe_percpu_thread_destroy(unsigned int cpu) | |
832 | { | |
833 | struct fcoe_percpu_s *p; | |
834 | struct task_struct *thread; | |
835 | struct page *crc_eof; | |
836 | struct sk_buff *skb; | |
837 | #ifdef CONFIG_SMP | |
838 | struct fcoe_percpu_s *p0; | |
839 | unsigned targ_cpu = smp_processor_id(); | |
840 | #endif /* CONFIG_SMP */ | |
841 | ||
d5488eb9 | 842 | FCOE_DBG("Destroying receive thread for CPU %d\n", cpu); |
8976f424 RL |
843 | |
844 | /* Prevent any new skbs from being queued for this CPU. */ | |
845 | p = &per_cpu(fcoe_percpu, cpu); | |
846 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
847 | thread = p->thread; | |
848 | p->thread = NULL; | |
849 | crc_eof = p->crc_eof_page; | |
850 | p->crc_eof_page = NULL; | |
851 | p->crc_eof_offset = 0; | |
852 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
853 | ||
854 | #ifdef CONFIG_SMP | |
855 | /* | |
856 | * Don't bother moving the skb's if this context is running | |
857 | * on the same CPU that is having its thread destroyed. This | |
858 | * can easily happen when the module is removed. | |
859 | */ | |
860 | if (cpu != targ_cpu) { | |
861 | p0 = &per_cpu(fcoe_percpu, targ_cpu); | |
862 | spin_lock_bh(&p0->fcoe_rx_list.lock); | |
863 | if (p0->thread) { | |
d5488eb9 RL |
864 | FCOE_DBG("Moving frames from CPU %d to CPU %d\n", |
865 | cpu, targ_cpu); | |
8976f424 RL |
866 | |
867 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
868 | __skb_queue_tail(&p0->fcoe_rx_list, skb); | |
869 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
870 | } else { | |
871 | /* | |
872 | * The targeted CPU is not initialized and cannot accept | |
873 | * new skbs. Unlock the targeted CPU and drop the skbs | |
874 | * on the CPU that is going offline. | |
875 | */ | |
876 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
877 | kfree_skb(skb); | |
878 | spin_unlock_bh(&p0->fcoe_rx_list.lock); | |
879 | } | |
880 | } else { | |
881 | /* | |
882 | * This scenario occurs when the module is being removed | |
883 | * and all threads are being destroyed. skbs will continue | |
884 | * to be shifted from the CPU thread that is being removed | |
885 | * to the CPU thread associated with the CPU that is processing | |
886 | * the module removal. Once there is only one CPU Rx thread it | |
887 | * will reach this case and we will drop all skbs and later | |
888 | * stop the thread. | |
889 | */ | |
890 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
891 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
892 | kfree_skb(skb); | |
893 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
894 | } | |
895 | #else | |
896 | /* | |
dd3fd72e | 897 | * This a non-SMP scenario where the singular Rx thread is |
8976f424 RL |
898 | * being removed. Free all skbs and stop the thread. |
899 | */ | |
900 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
901 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL) | |
902 | kfree_skb(skb); | |
903 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
904 | #endif | |
905 | ||
906 | if (thread) | |
907 | kthread_stop(thread); | |
908 | ||
909 | if (crc_eof) | |
910 | put_page(crc_eof); | |
911 | } | |
912 | ||
913 | /** | |
914 | * fcoe_cpu_callback() - fcoe cpu hotplug event callback | |
915 | * @nfb: callback data block | |
916 | * @action: event triggering the callback | |
917 | * @hcpu: index for the cpu of this event | |
918 | * | |
919 | * This creates or destroys per cpu data for fcoe | |
920 | * | |
921 | * Returns NOTIFY_OK always. | |
922 | */ | |
923 | static int fcoe_cpu_callback(struct notifier_block *nfb, | |
924 | unsigned long action, void *hcpu) | |
925 | { | |
926 | unsigned cpu = (unsigned long)hcpu; | |
927 | ||
928 | switch (action) { | |
929 | case CPU_ONLINE: | |
930 | case CPU_ONLINE_FROZEN: | |
d5488eb9 | 931 | FCOE_DBG("CPU %x online: Create Rx thread\n", cpu); |
8976f424 RL |
932 | fcoe_percpu_thread_create(cpu); |
933 | break; | |
934 | case CPU_DEAD: | |
935 | case CPU_DEAD_FROZEN: | |
d5488eb9 | 936 | FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu); |
8976f424 RL |
937 | fcoe_percpu_thread_destroy(cpu); |
938 | break; | |
939 | default: | |
940 | break; | |
941 | } | |
942 | return NOTIFY_OK; | |
943 | } | |
944 | ||
945 | static struct notifier_block fcoe_cpu_notifier = { | |
946 | .notifier_call = fcoe_cpu_callback, | |
947 | }; | |
948 | ||
85b4aa49 | 949 | /** |
34f42a07 | 950 | * fcoe_rcv() - this is the fcoe receive function called by NET_RX_SOFTIRQ |
85b4aa49 RL |
951 | * @skb: the receive skb |
952 | * @dev: associated net device | |
953 | * @ptype: context | |
dd3fd72e | 954 | * @olddev: last device |
85b4aa49 RL |
955 | * |
956 | * this function will receive the packet and build fc frame and pass it up | |
957 | * | |
958 | * Returns: 0 for success | |
34f42a07 | 959 | */ |
85b4aa49 RL |
960 | int fcoe_rcv(struct sk_buff *skb, struct net_device *dev, |
961 | struct packet_type *ptype, struct net_device *olddev) | |
962 | { | |
963 | struct fc_lport *lp; | |
964 | struct fcoe_rcv_info *fr; | |
259ad85d | 965 | struct fcoe_interface *fcoe; |
85b4aa49 | 966 | struct fc_frame_header *fh; |
85b4aa49 | 967 | struct fcoe_percpu_s *fps; |
b2f0091f | 968 | unsigned int cpu; |
85b4aa49 | 969 | |
259ad85d | 970 | fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); |
3fe9a0ba | 971 | lp = fcoe->ctlr.lp; |
85b4aa49 | 972 | if (unlikely(lp == NULL)) { |
d5488eb9 | 973 | FCOE_NETDEV_DBG(dev, "Cannot find hba structure"); |
85b4aa49 RL |
974 | goto err2; |
975 | } | |
97c8389d JE |
976 | if (!lp->link_up) |
977 | goto err2; | |
85b4aa49 | 978 | |
d5488eb9 RL |
979 | FCOE_NETDEV_DBG(dev, "skb_info: len:%d data_len:%d head:%p " |
980 | "data:%p tail:%p end:%p sum:%d dev:%s", | |
981 | skb->len, skb->data_len, skb->head, skb->data, | |
982 | skb_tail_pointer(skb), skb_end_pointer(skb), | |
983 | skb->csum, skb->dev ? skb->dev->name : "<NULL>"); | |
85b4aa49 RL |
984 | |
985 | /* check for FCOE packet type */ | |
986 | if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) { | |
d5488eb9 | 987 | FCOE_NETDEV_DBG(dev, "Wrong FC type frame"); |
85b4aa49 RL |
988 | goto err; |
989 | } | |
990 | ||
991 | /* | |
992 | * Check for minimum frame length, and make sure required FCoE | |
993 | * and FC headers are pulled into the linear data area. | |
994 | */ | |
995 | if (unlikely((skb->len < FCOE_MIN_FRAME) || | |
996 | !pskb_may_pull(skb, FCOE_HEADER_LEN))) | |
997 | goto err; | |
998 | ||
999 | skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); | |
1000 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1001 | ||
85b4aa49 RL |
1002 | fr = fcoe_dev_from_skb(skb); |
1003 | fr->fr_dev = lp; | |
1004 | fr->ptype = ptype; | |
5e5e92df | 1005 | |
85b4aa49 | 1006 | /* |
b2f0091f VD |
1007 | * In case the incoming frame's exchange is originated from |
1008 | * the initiator, then received frame's exchange id is ANDed | |
1009 | * with fc_cpu_mask bits to get the same cpu on which exchange | |
1010 | * was originated, otherwise just use the current cpu. | |
85b4aa49 | 1011 | */ |
b2f0091f VD |
1012 | if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) |
1013 | cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; | |
1014 | else | |
1015 | cpu = smp_processor_id(); | |
5e5e92df | 1016 | |
8976f424 | 1017 | fps = &per_cpu(fcoe_percpu, cpu); |
85b4aa49 | 1018 | spin_lock_bh(&fps->fcoe_rx_list.lock); |
8976f424 RL |
1019 | if (unlikely(!fps->thread)) { |
1020 | /* | |
1021 | * The targeted CPU is not ready, let's target | |
1022 | * the first CPU now. For non-SMP systems this | |
1023 | * will check the same CPU twice. | |
1024 | */ | |
d5488eb9 RL |
1025 | FCOE_NETDEV_DBG(dev, "CPU is online, but no receive thread " |
1026 | "ready for incoming skb- using first online " | |
1027 | "CPU.\n"); | |
8976f424 RL |
1028 | |
1029 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1030 | cpu = first_cpu(cpu_online_map); | |
1031 | fps = &per_cpu(fcoe_percpu, cpu); | |
1032 | spin_lock_bh(&fps->fcoe_rx_list.lock); | |
1033 | if (!fps->thread) { | |
1034 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1035 | goto err; | |
1036 | } | |
1037 | } | |
1038 | ||
1039 | /* | |
1040 | * We now have a valid CPU that we're targeting for | |
1041 | * this skb. We also have this receive thread locked, | |
1042 | * so we're free to queue skbs into it's queue. | |
1043 | */ | |
85b4aa49 RL |
1044 | __skb_queue_tail(&fps->fcoe_rx_list, skb); |
1045 | if (fps->fcoe_rx_list.qlen == 1) | |
1046 | wake_up_process(fps->thread); | |
1047 | ||
1048 | spin_unlock_bh(&fps->fcoe_rx_list.lock); | |
1049 | ||
1050 | return 0; | |
1051 | err: | |
582b45bc | 1052 | fc_lport_get_stats(lp)->ErrorFrames++; |
85b4aa49 RL |
1053 | |
1054 | err2: | |
1055 | kfree_skb(skb); | |
1056 | return -1; | |
1057 | } | |
85b4aa49 RL |
1058 | |
1059 | /** | |
34f42a07 | 1060 | * fcoe_start_io() - pass to netdev to start xmit for fcoe |
85b4aa49 RL |
1061 | * @skb: the skb to be xmitted |
1062 | * | |
1063 | * Returns: 0 for success | |
34f42a07 | 1064 | */ |
85b4aa49 RL |
1065 | static inline int fcoe_start_io(struct sk_buff *skb) |
1066 | { | |
1067 | int rc; | |
1068 | ||
1069 | skb_get(skb); | |
1070 | rc = dev_queue_xmit(skb); | |
1071 | if (rc != 0) | |
1072 | return rc; | |
1073 | kfree_skb(skb); | |
1074 | return 0; | |
1075 | } | |
1076 | ||
1077 | /** | |
dd3fd72e | 1078 | * fcoe_get_paged_crc_eof() - in case we need to alloc a page for crc_eof |
85b4aa49 RL |
1079 | * @skb: the skb to be xmitted |
1080 | * @tlen: total len | |
1081 | * | |
1082 | * Returns: 0 for success | |
34f42a07 | 1083 | */ |
85b4aa49 RL |
1084 | static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen) |
1085 | { | |
1086 | struct fcoe_percpu_s *fps; | |
1087 | struct page *page; | |
85b4aa49 | 1088 | |
5e5e92df | 1089 | fps = &get_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1090 | page = fps->crc_eof_page; |
1091 | if (!page) { | |
1092 | page = alloc_page(GFP_ATOMIC); | |
1093 | if (!page) { | |
5e5e92df | 1094 | put_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1095 | return -ENOMEM; |
1096 | } | |
1097 | fps->crc_eof_page = page; | |
8976f424 | 1098 | fps->crc_eof_offset = 0; |
85b4aa49 RL |
1099 | } |
1100 | ||
1101 | get_page(page); | |
1102 | skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page, | |
1103 | fps->crc_eof_offset, tlen); | |
1104 | skb->len += tlen; | |
1105 | skb->data_len += tlen; | |
1106 | skb->truesize += tlen; | |
1107 | fps->crc_eof_offset += sizeof(struct fcoe_crc_eof); | |
1108 | ||
1109 | if (fps->crc_eof_offset >= PAGE_SIZE) { | |
1110 | fps->crc_eof_page = NULL; | |
1111 | fps->crc_eof_offset = 0; | |
1112 | put_page(page); | |
1113 | } | |
5e5e92df | 1114 | put_cpu_var(fcoe_percpu); |
85b4aa49 RL |
1115 | return 0; |
1116 | } | |
1117 | ||
1118 | /** | |
34f42a07 | 1119 | * fcoe_fc_crc() - calculates FC CRC in this fcoe skb |
dd3fd72e | 1120 | * @fp: the fc_frame containing data to be checksummed |
85b4aa49 | 1121 | * |
014f5c3f | 1122 | * This uses crc32() to calculate the crc for port frame |
85b4aa49 | 1123 | * Return : 32 bit crc |
34f42a07 | 1124 | */ |
85b4aa49 RL |
1125 | u32 fcoe_fc_crc(struct fc_frame *fp) |
1126 | { | |
1127 | struct sk_buff *skb = fp_skb(fp); | |
1128 | struct skb_frag_struct *frag; | |
1129 | unsigned char *data; | |
1130 | unsigned long off, len, clen; | |
1131 | u32 crc; | |
1132 | unsigned i; | |
1133 | ||
1134 | crc = crc32(~0, skb->data, skb_headlen(skb)); | |
1135 | ||
1136 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1137 | frag = &skb_shinfo(skb)->frags[i]; | |
1138 | off = frag->page_offset; | |
1139 | len = frag->size; | |
1140 | while (len > 0) { | |
1141 | clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK)); | |
1142 | data = kmap_atomic(frag->page + (off >> PAGE_SHIFT), | |
1143 | KM_SKB_DATA_SOFTIRQ); | |
1144 | crc = crc32(crc, data + (off & ~PAGE_MASK), clen); | |
1145 | kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ); | |
1146 | off += clen; | |
1147 | len -= clen; | |
1148 | } | |
1149 | } | |
1150 | return crc; | |
1151 | } | |
85b4aa49 RL |
1152 | |
1153 | /** | |
34f42a07 | 1154 | * fcoe_xmit() - FCoE frame transmit function |
014f5c3f | 1155 | * @lp: the associated local fcoe |
85b4aa49 RL |
1156 | * @fp: the fc_frame to be transmitted |
1157 | * | |
1158 | * Return : 0 for success | |
34f42a07 | 1159 | */ |
85b4aa49 RL |
1160 | int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp) |
1161 | { | |
4bb6b515 | 1162 | int wlen; |
85b4aa49 RL |
1163 | u32 crc; |
1164 | struct ethhdr *eh; | |
1165 | struct fcoe_crc_eof *cp; | |
1166 | struct sk_buff *skb; | |
1167 | struct fcoe_dev_stats *stats; | |
1168 | struct fc_frame_header *fh; | |
1169 | unsigned int hlen; /* header length implies the version */ | |
1170 | unsigned int tlen; /* trailer length */ | |
1171 | unsigned int elen; /* eth header, may include vlan */ | |
3fe9a0ba CL |
1172 | struct fcoe_port *port = lport_priv(lp); |
1173 | struct fcoe_interface *fcoe = port->fcoe; | |
85b4aa49 RL |
1174 | u8 sof, eof; |
1175 | struct fcoe_hdr *hp; | |
1176 | ||
1177 | WARN_ON((fr_len(fp) % sizeof(u32)) != 0); | |
1178 | ||
85b4aa49 | 1179 | fh = fc_frame_header_get(fp); |
97c8389d JE |
1180 | skb = fp_skb(fp); |
1181 | wlen = skb->len / FCOE_WORD_TO_BYTE; | |
1182 | ||
1183 | if (!lp->link_up) { | |
3caf02ee | 1184 | kfree_skb(skb); |
97c8389d | 1185 | return 0; |
85b4aa49 RL |
1186 | } |
1187 | ||
97c8389d | 1188 | if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) && |
3fe9a0ba | 1189 | fcoe_ctlr_els_send(&fcoe->ctlr, skb)) |
97c8389d JE |
1190 | return 0; |
1191 | ||
85b4aa49 RL |
1192 | sof = fr_sof(fp); |
1193 | eof = fr_eof(fp); | |
1194 | ||
4e57e1cb | 1195 | elen = sizeof(struct ethhdr); |
85b4aa49 RL |
1196 | hlen = sizeof(struct fcoe_hdr); |
1197 | tlen = sizeof(struct fcoe_crc_eof); | |
1198 | wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; | |
1199 | ||
1200 | /* crc offload */ | |
1201 | if (likely(lp->crc_offload)) { | |
39ca9a06 | 1202 | skb->ip_summed = CHECKSUM_PARTIAL; |
85b4aa49 RL |
1203 | skb->csum_start = skb_headroom(skb); |
1204 | skb->csum_offset = skb->len; | |
1205 | crc = 0; | |
1206 | } else { | |
1207 | skb->ip_summed = CHECKSUM_NONE; | |
1208 | crc = fcoe_fc_crc(fp); | |
1209 | } | |
1210 | ||
014f5c3f | 1211 | /* copy port crc and eof to the skb buff */ |
85b4aa49 RL |
1212 | if (skb_is_nonlinear(skb)) { |
1213 | skb_frag_t *frag; | |
1214 | if (fcoe_get_paged_crc_eof(skb, tlen)) { | |
e9041581 | 1215 | kfree_skb(skb); |
85b4aa49 RL |
1216 | return -ENOMEM; |
1217 | } | |
1218 | frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; | |
1219 | cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ) | |
1220 | + frag->page_offset; | |
1221 | } else { | |
1222 | cp = (struct fcoe_crc_eof *)skb_put(skb, tlen); | |
1223 | } | |
1224 | ||
1225 | memset(cp, 0, sizeof(*cp)); | |
1226 | cp->fcoe_eof = eof; | |
1227 | cp->fcoe_crc32 = cpu_to_le32(~crc); | |
1228 | ||
1229 | if (skb_is_nonlinear(skb)) { | |
1230 | kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ); | |
1231 | cp = NULL; | |
1232 | } | |
1233 | ||
014f5c3f | 1234 | /* adjust skb network/transport offsets to match mac/fcoe/port */ |
85b4aa49 RL |
1235 | skb_push(skb, elen + hlen); |
1236 | skb_reset_mac_header(skb); | |
1237 | skb_reset_network_header(skb); | |
1238 | skb->mac_len = elen; | |
211c738d | 1239 | skb->protocol = htons(ETH_P_FCOE); |
3fe9a0ba | 1240 | skb->dev = fcoe->netdev; |
85b4aa49 RL |
1241 | |
1242 | /* fill up mac and fcoe headers */ | |
1243 | eh = eth_hdr(skb); | |
1244 | eh->h_proto = htons(ETH_P_FCOE); | |
3fe9a0ba | 1245 | if (fcoe->ctlr.map_dest) |
85b4aa49 RL |
1246 | fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id); |
1247 | else | |
1248 | /* insert GW address */ | |
3fe9a0ba | 1249 | memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN); |
85b4aa49 | 1250 | |
3fe9a0ba CL |
1251 | if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN)) |
1252 | memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN); | |
85b4aa49 | 1253 | else |
3fe9a0ba | 1254 | memcpy(eh->h_source, fcoe->ctlr.data_src_addr, ETH_ALEN); |
85b4aa49 RL |
1255 | |
1256 | hp = (struct fcoe_hdr *)(eh + 1); | |
1257 | memset(hp, 0, sizeof(*hp)); | |
1258 | if (FC_FCOE_VER) | |
1259 | FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); | |
1260 | hp->fcoe_sof = sof; | |
1261 | ||
39ca9a06 YZ |
1262 | /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ |
1263 | if (lp->seq_offload && fr_max_payload(fp)) { | |
1264 | skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; | |
1265 | skb_shinfo(skb)->gso_size = fr_max_payload(fp); | |
1266 | } else { | |
1267 | skb_shinfo(skb)->gso_type = 0; | |
1268 | skb_shinfo(skb)->gso_size = 0; | |
1269 | } | |
85b4aa49 | 1270 | /* update tx stats: regardless if LLD fails */ |
582b45bc RL |
1271 | stats = fc_lport_get_stats(lp); |
1272 | stats->TxFrames++; | |
1273 | stats->TxWords += wlen; | |
85b4aa49 RL |
1274 | |
1275 | /* send down to lld */ | |
1276 | fr_dev(fp) = lp; | |
014f5c3f | 1277 | if (port->fcoe_pending_queue.qlen) |
4bb6b515 VD |
1278 | fcoe_check_wait_queue(lp, skb); |
1279 | else if (fcoe_start_io(skb)) | |
1280 | fcoe_check_wait_queue(lp, skb); | |
85b4aa49 RL |
1281 | |
1282 | return 0; | |
1283 | } | |
85b4aa49 | 1284 | |
34f42a07 RL |
1285 | /** |
1286 | * fcoe_percpu_receive_thread() - recv thread per cpu | |
85b4aa49 RL |
1287 | * @arg: ptr to the fcoe per cpu struct |
1288 | * | |
1289 | * Return: 0 for success | |
85b4aa49 RL |
1290 | */ |
1291 | int fcoe_percpu_receive_thread(void *arg) | |
1292 | { | |
1293 | struct fcoe_percpu_s *p = arg; | |
1294 | u32 fr_len; | |
1295 | struct fc_lport *lp; | |
1296 | struct fcoe_rcv_info *fr; | |
1297 | struct fcoe_dev_stats *stats; | |
1298 | struct fc_frame_header *fh; | |
1299 | struct sk_buff *skb; | |
1300 | struct fcoe_crc_eof crc_eof; | |
1301 | struct fc_frame *fp; | |
1302 | u8 *mac = NULL; | |
014f5c3f | 1303 | struct fcoe_port *port; |
85b4aa49 RL |
1304 | struct fcoe_hdr *hp; |
1305 | ||
4469c195 | 1306 | set_user_nice(current, -20); |
85b4aa49 RL |
1307 | |
1308 | while (!kthread_should_stop()) { | |
1309 | ||
1310 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1311 | while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) { | |
1312 | set_current_state(TASK_INTERRUPTIBLE); | |
1313 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1314 | schedule(); | |
1315 | set_current_state(TASK_RUNNING); | |
1316 | if (kthread_should_stop()) | |
1317 | return 0; | |
1318 | spin_lock_bh(&p->fcoe_rx_list.lock); | |
1319 | } | |
1320 | spin_unlock_bh(&p->fcoe_rx_list.lock); | |
1321 | fr = fcoe_dev_from_skb(skb); | |
1322 | lp = fr->fr_dev; | |
1323 | if (unlikely(lp == NULL)) { | |
d5488eb9 | 1324 | FCOE_NETDEV_DBG(skb->dev, "Invalid HBA Structure"); |
85b4aa49 RL |
1325 | kfree_skb(skb); |
1326 | continue; | |
1327 | } | |
1328 | ||
d5488eb9 RL |
1329 | FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d " |
1330 | "head:%p data:%p tail:%p end:%p sum:%d dev:%s", | |
1331 | skb->len, skb->data_len, | |
1332 | skb->head, skb->data, skb_tail_pointer(skb), | |
1333 | skb_end_pointer(skb), skb->csum, | |
1334 | skb->dev ? skb->dev->name : "<NULL>"); | |
85b4aa49 RL |
1335 | |
1336 | /* | |
1337 | * Save source MAC address before discarding header. | |
1338 | */ | |
014f5c3f | 1339 | port = lport_priv(lp); |
85b4aa49 RL |
1340 | if (skb_is_nonlinear(skb)) |
1341 | skb_linearize(skb); /* not ideal */ | |
97c8389d | 1342 | mac = eth_hdr(skb)->h_source; |
85b4aa49 RL |
1343 | |
1344 | /* | |
1345 | * Frame length checks and setting up the header pointers | |
1346 | * was done in fcoe_rcv already. | |
1347 | */ | |
1348 | hp = (struct fcoe_hdr *) skb_network_header(skb); | |
1349 | fh = (struct fc_frame_header *) skb_transport_header(skb); | |
1350 | ||
582b45bc | 1351 | stats = fc_lport_get_stats(lp); |
85b4aa49 | 1352 | if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { |
582b45bc | 1353 | if (stats->ErrorFrames < 5) |
d5488eb9 | 1354 | printk(KERN_WARNING "fcoe: FCoE version " |
582b45bc RL |
1355 | "mismatch: The frame has " |
1356 | "version %x, but the " | |
1357 | "initiator supports version " | |
1358 | "%x\n", FC_FCOE_DECAPS_VER(hp), | |
1359 | FC_FCOE_VER); | |
1360 | stats->ErrorFrames++; | |
85b4aa49 RL |
1361 | kfree_skb(skb); |
1362 | continue; | |
1363 | } | |
1364 | ||
1365 | skb_pull(skb, sizeof(struct fcoe_hdr)); | |
1366 | fr_len = skb->len - sizeof(struct fcoe_crc_eof); | |
1367 | ||
582b45bc RL |
1368 | stats->RxFrames++; |
1369 | stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; | |
85b4aa49 RL |
1370 | |
1371 | fp = (struct fc_frame *)skb; | |
1372 | fc_frame_init(fp); | |
1373 | fr_dev(fp) = lp; | |
1374 | fr_sof(fp) = hp->fcoe_sof; | |
1375 | ||
1376 | /* Copy out the CRC and EOF trailer for access */ | |
1377 | if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) { | |
1378 | kfree_skb(skb); | |
1379 | continue; | |
1380 | } | |
1381 | fr_eof(fp) = crc_eof.fcoe_eof; | |
1382 | fr_crc(fp) = crc_eof.fcoe_crc32; | |
1383 | if (pskb_trim(skb, fr_len)) { | |
1384 | kfree_skb(skb); | |
1385 | continue; | |
1386 | } | |
1387 | ||
1388 | /* | |
1389 | * We only check CRC if no offload is available and if it is | |
1390 | * it's solicited data, in which case, the FCP layer would | |
1391 | * check it during the copy. | |
1392 | */ | |
07c00ec4 | 1393 | if (lp->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY) |
85b4aa49 RL |
1394 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; |
1395 | else | |
1396 | fr_flags(fp) |= FCPHF_CRC_UNCHECKED; | |
1397 | ||
1398 | fh = fc_frame_header_get(fp); | |
1399 | if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && | |
1400 | fh->fh_type == FC_TYPE_FCP) { | |
52ff878c | 1401 | fc_exch_recv(lp, fp); |
85b4aa49 RL |
1402 | continue; |
1403 | } | |
1404 | if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) { | |
1405 | if (le32_to_cpu(fr_crc(fp)) != | |
1406 | ~crc32(~0, skb->data, fr_len)) { | |
d5488eb9 | 1407 | if (stats->InvalidCRCCount < 5) |
85b4aa49 RL |
1408 | printk(KERN_WARNING "fcoe: dropping " |
1409 | "frame with CRC error\n"); | |
1410 | stats->InvalidCRCCount++; | |
1411 | stats->ErrorFrames++; | |
1412 | fc_frame_free(fp); | |
1413 | continue; | |
1414 | } | |
1415 | fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; | |
1416 | } | |
3fe9a0ba CL |
1417 | if (unlikely(port->fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN) && |
1418 | fcoe_ctlr_recv_flogi(&port->fcoe->ctlr, fp, mac)) { | |
97c8389d JE |
1419 | fc_frame_free(fp); |
1420 | continue; | |
1421 | } | |
52ff878c | 1422 | fc_exch_recv(lp, fp); |
85b4aa49 RL |
1423 | } |
1424 | return 0; | |
1425 | } | |
1426 | ||
85b4aa49 | 1427 | /** |
dd3fd72e CL |
1428 | * fcoe_check_wait_queue() - attempt to clear the transmit backlog |
1429 | * @lp: the fc_lport | |
85b4aa49 RL |
1430 | * |
1431 | * This empties the wait_queue, dequeue the head of the wait_queue queue | |
1432 | * and calls fcoe_start_io() for each packet, if all skb have been | |
c826a314 | 1433 | * transmitted, return qlen or -1 if a error occurs, then restore |
dd3fd72e | 1434 | * wait_queue and try again later. |
85b4aa49 RL |
1435 | * |
1436 | * The wait_queue is used when the skb transmit fails. skb will go | |
dd3fd72e | 1437 | * in the wait_queue which will be emptied by the timer function or |
85b4aa49 | 1438 | * by the next skb transmit. |
34f42a07 | 1439 | */ |
4bb6b515 | 1440 | static void fcoe_check_wait_queue(struct fc_lport *lp, struct sk_buff *skb) |
85b4aa49 | 1441 | { |
014f5c3f | 1442 | struct fcoe_port *port = lport_priv(lp); |
4bb6b515 | 1443 | int rc; |
85b4aa49 | 1444 | |
014f5c3f | 1445 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
4bb6b515 VD |
1446 | |
1447 | if (skb) | |
014f5c3f | 1448 | __skb_queue_tail(&port->fcoe_pending_queue, skb); |
4bb6b515 | 1449 | |
014f5c3f | 1450 | if (port->fcoe_pending_queue_active) |
c826a314 | 1451 | goto out; |
014f5c3f | 1452 | port->fcoe_pending_queue_active = 1; |
55c8bafb | 1453 | |
014f5c3f | 1454 | while (port->fcoe_pending_queue.qlen) { |
55c8bafb | 1455 | /* keep qlen > 0 until fcoe_start_io succeeds */ |
014f5c3f CL |
1456 | port->fcoe_pending_queue.qlen++; |
1457 | skb = __skb_dequeue(&port->fcoe_pending_queue); | |
55c8bafb | 1458 | |
014f5c3f | 1459 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
55c8bafb | 1460 | rc = fcoe_start_io(skb); |
014f5c3f | 1461 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
55c8bafb CL |
1462 | |
1463 | if (rc) { | |
014f5c3f | 1464 | __skb_queue_head(&port->fcoe_pending_queue, skb); |
55c8bafb | 1465 | /* undo temporary increment above */ |
014f5c3f | 1466 | port->fcoe_pending_queue.qlen--; |
55c8bafb | 1467 | break; |
85b4aa49 | 1468 | } |
55c8bafb | 1469 | /* undo temporary increment above */ |
014f5c3f | 1470 | port->fcoe_pending_queue.qlen--; |
85b4aa49 | 1471 | } |
55c8bafb | 1472 | |
014f5c3f | 1473 | if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH) |
55c8bafb | 1474 | lp->qfull = 0; |
014f5c3f CL |
1475 | if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer)) |
1476 | mod_timer(&port->timer, jiffies + 2); | |
1477 | port->fcoe_pending_queue_active = 0; | |
c826a314 | 1478 | out: |
014f5c3f | 1479 | if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH) |
4bb6b515 | 1480 | lp->qfull = 1; |
014f5c3f | 1481 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
4bb6b515 | 1482 | return; |
85b4aa49 RL |
1483 | } |
1484 | ||
85b4aa49 | 1485 | /** |
34f42a07 RL |
1486 | * fcoe_dev_setup() - setup link change notification interface |
1487 | */ | |
b0d428ad | 1488 | static void fcoe_dev_setup(void) |
85b4aa49 | 1489 | { |
85b4aa49 RL |
1490 | register_netdevice_notifier(&fcoe_notifier); |
1491 | } | |
1492 | ||
1493 | /** | |
b0d428ad | 1494 | * fcoe_dev_cleanup() - cleanup link change notification interface |
34f42a07 | 1495 | */ |
85b4aa49 RL |
1496 | static void fcoe_dev_cleanup(void) |
1497 | { | |
1498 | unregister_netdevice_notifier(&fcoe_notifier); | |
1499 | } | |
1500 | ||
1501 | /** | |
34f42a07 | 1502 | * fcoe_device_notification() - netdev event notification callback |
85b4aa49 RL |
1503 | * @notifier: context of the notification |
1504 | * @event: type of event | |
1505 | * @ptr: fixed array for output parsed ifname | |
1506 | * | |
1507 | * This function is called by the ethernet driver in case of link change event | |
1508 | * | |
1509 | * Returns: 0 for success | |
34f42a07 | 1510 | */ |
85b4aa49 RL |
1511 | static int fcoe_device_notification(struct notifier_block *notifier, |
1512 | ulong event, void *ptr) | |
1513 | { | |
1514 | struct fc_lport *lp = NULL; | |
1d1b88dc | 1515 | struct net_device *netdev = ptr; |
014f5c3f | 1516 | struct fcoe_interface *fcoe; |
85b4aa49 | 1517 | struct fcoe_dev_stats *stats; |
97c8389d | 1518 | u32 link_possible = 1; |
85b4aa49 RL |
1519 | u32 mfs; |
1520 | int rc = NOTIFY_OK; | |
1521 | ||
1522 | read_lock(&fcoe_hostlist_lock); | |
014f5c3f | 1523 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
25024989 | 1524 | if (fcoe->netdev == netdev) { |
3fe9a0ba | 1525 | lp = fcoe->ctlr.lp; |
85b4aa49 RL |
1526 | break; |
1527 | } | |
1528 | } | |
1529 | read_unlock(&fcoe_hostlist_lock); | |
1530 | if (lp == NULL) { | |
1531 | rc = NOTIFY_DONE; | |
1532 | goto out; | |
1533 | } | |
1534 | ||
85b4aa49 RL |
1535 | switch (event) { |
1536 | case NETDEV_DOWN: | |
1537 | case NETDEV_GOING_DOWN: | |
97c8389d | 1538 | link_possible = 0; |
85b4aa49 RL |
1539 | break; |
1540 | case NETDEV_UP: | |
1541 | case NETDEV_CHANGE: | |
85b4aa49 RL |
1542 | break; |
1543 | case NETDEV_CHANGEMTU: | |
1d1b88dc VD |
1544 | mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + |
1545 | sizeof(struct fcoe_crc_eof)); | |
85b4aa49 RL |
1546 | if (mfs >= FC_MIN_MAX_FRAME) |
1547 | fc_set_mfs(lp, mfs); | |
85b4aa49 RL |
1548 | break; |
1549 | case NETDEV_REGISTER: | |
1550 | break; | |
1551 | default: | |
1d1b88dc | 1552 | FCOE_NETDEV_DBG(netdev, "Unknown event %ld " |
d5488eb9 | 1553 | "from netdev netlink\n", event); |
85b4aa49 | 1554 | } |
97c8389d | 1555 | if (link_possible && !fcoe_link_ok(lp)) |
3fe9a0ba CL |
1556 | fcoe_ctlr_link_up(&fcoe->ctlr); |
1557 | else if (fcoe_ctlr_link_down(&fcoe->ctlr)) { | |
97c8389d JE |
1558 | stats = fc_lport_get_stats(lp); |
1559 | stats->LinkFailureCount++; | |
1560 | fcoe_clean_pending_queue(lp); | |
85b4aa49 RL |
1561 | } |
1562 | out: | |
1563 | return rc; | |
1564 | } | |
1565 | ||
1566 | /** | |
34f42a07 | 1567 | * fcoe_if_to_netdev() - parse a name buffer to get netdev |
85b4aa49 RL |
1568 | * @buffer: incoming buffer to be copied |
1569 | * | |
dd3fd72e | 1570 | * Returns: NULL or ptr to net_device |
34f42a07 | 1571 | */ |
85b4aa49 RL |
1572 | static struct net_device *fcoe_if_to_netdev(const char *buffer) |
1573 | { | |
1574 | char *cp; | |
1575 | char ifname[IFNAMSIZ + 2]; | |
1576 | ||
1577 | if (buffer) { | |
1578 | strlcpy(ifname, buffer, IFNAMSIZ); | |
1579 | cp = ifname + strlen(ifname); | |
1580 | while (--cp >= ifname && *cp == '\n') | |
1581 | *cp = '\0'; | |
1582 | return dev_get_by_name(&init_net, ifname); | |
1583 | } | |
1584 | return NULL; | |
1585 | } | |
1586 | ||
1587 | /** | |
dd3fd72e | 1588 | * fcoe_netdev_to_module_owner() - finds out the driver module of the netdev |
85b4aa49 RL |
1589 | * @netdev: the target netdev |
1590 | * | |
1591 | * Returns: ptr to the struct module, NULL for failure | |
34f42a07 | 1592 | */ |
b2ab99c9 RL |
1593 | static struct module * |
1594 | fcoe_netdev_to_module_owner(const struct net_device *netdev) | |
85b4aa49 RL |
1595 | { |
1596 | struct device *dev; | |
1597 | ||
1598 | if (!netdev) | |
1599 | return NULL; | |
1600 | ||
1601 | dev = netdev->dev.parent; | |
1602 | if (!dev) | |
1603 | return NULL; | |
1604 | ||
1605 | if (!dev->driver) | |
1606 | return NULL; | |
1607 | ||
1608 | return dev->driver->owner; | |
1609 | } | |
1610 | ||
1611 | /** | |
34f42a07 | 1612 | * fcoe_ethdrv_get() - Hold the Ethernet driver |
85b4aa49 RL |
1613 | * @netdev: the target netdev |
1614 | * | |
34f42a07 RL |
1615 | * Holds the Ethernet driver module by try_module_get() for |
1616 | * the corresponding netdev. | |
1617 | * | |
dd3fd72e | 1618 | * Returns: 0 for success |
34f42a07 | 1619 | */ |
85b4aa49 RL |
1620 | static int fcoe_ethdrv_get(const struct net_device *netdev) |
1621 | { | |
1622 | struct module *owner; | |
1623 | ||
1624 | owner = fcoe_netdev_to_module_owner(netdev); | |
1625 | if (owner) { | |
d5488eb9 RL |
1626 | FCOE_NETDEV_DBG(netdev, "Hold driver module %s\n", |
1627 | module_name(owner)); | |
85b4aa49 RL |
1628 | return try_module_get(owner); |
1629 | } | |
1630 | return -ENODEV; | |
1631 | } | |
1632 | ||
1633 | /** | |
34f42a07 | 1634 | * fcoe_ethdrv_put() - Release the Ethernet driver |
85b4aa49 RL |
1635 | * @netdev: the target netdev |
1636 | * | |
34f42a07 RL |
1637 | * Releases the Ethernet driver module by module_put for |
1638 | * the corresponding netdev. | |
1639 | * | |
dd3fd72e | 1640 | * Returns: 0 for success |
34f42a07 | 1641 | */ |
85b4aa49 RL |
1642 | static int fcoe_ethdrv_put(const struct net_device *netdev) |
1643 | { | |
1644 | struct module *owner; | |
1645 | ||
1646 | owner = fcoe_netdev_to_module_owner(netdev); | |
1647 | if (owner) { | |
d5488eb9 RL |
1648 | FCOE_NETDEV_DBG(netdev, "Release driver module %s\n", |
1649 | module_name(owner)); | |
85b4aa49 RL |
1650 | module_put(owner); |
1651 | return 0; | |
1652 | } | |
1653 | return -ENODEV; | |
1654 | } | |
1655 | ||
1656 | /** | |
34f42a07 | 1657 | * fcoe_destroy() - handles the destroy from sysfs |
dd3fd72e | 1658 | * @buffer: expected to be an eth if name |
85b4aa49 RL |
1659 | * @kp: associated kernel param |
1660 | * | |
1661 | * Returns: 0 for success | |
34f42a07 | 1662 | */ |
85b4aa49 RL |
1663 | static int fcoe_destroy(const char *buffer, struct kernel_param *kp) |
1664 | { | |
85b4aa49 | 1665 | struct net_device *netdev; |
030f4e00 CL |
1666 | struct fcoe_interface *fcoe; |
1667 | struct fcoe_port *port; | |
af7f85d9 CL |
1668 | struct fc_lport *lport; |
1669 | int rc; | |
85b4aa49 RL |
1670 | |
1671 | netdev = fcoe_if_to_netdev(buffer); | |
1672 | if (!netdev) { | |
1673 | rc = -ENODEV; | |
1674 | goto out_nodev; | |
1675 | } | |
1676 | /* look for existing lport */ | |
af7f85d9 CL |
1677 | lport = fcoe_hostlist_lookup(netdev); |
1678 | if (!lport) { | |
85b4aa49 RL |
1679 | rc = -ENODEV; |
1680 | goto out_putdev; | |
1681 | } | |
030f4e00 CL |
1682 | port = lport_priv(lport); |
1683 | fcoe = port->fcoe; | |
af7f85d9 | 1684 | fcoe_if_destroy(lport); |
85b4aa49 RL |
1685 | fcoe_ethdrv_put(netdev); |
1686 | rc = 0; | |
1687 | out_putdev: | |
1688 | dev_put(netdev); | |
1689 | out_nodev: | |
1690 | return rc; | |
1691 | } | |
1692 | ||
1693 | /** | |
34f42a07 | 1694 | * fcoe_create() - Handles the create call from sysfs |
dd3fd72e | 1695 | * @buffer: expected to be an eth if name |
85b4aa49 RL |
1696 | * @kp: associated kernel param |
1697 | * | |
1698 | * Returns: 0 for success | |
34f42a07 | 1699 | */ |
85b4aa49 RL |
1700 | static int fcoe_create(const char *buffer, struct kernel_param *kp) |
1701 | { | |
1702 | int rc; | |
030f4e00 | 1703 | struct fcoe_interface *fcoe; |
af7f85d9 | 1704 | struct fc_lport *lport; |
85b4aa49 RL |
1705 | struct net_device *netdev; |
1706 | ||
1707 | netdev = fcoe_if_to_netdev(buffer); | |
1708 | if (!netdev) { | |
1709 | rc = -ENODEV; | |
1710 | goto out_nodev; | |
1711 | } | |
1712 | /* look for existing lport */ | |
1713 | if (fcoe_hostlist_lookup(netdev)) { | |
1714 | rc = -EEXIST; | |
1715 | goto out_putdev; | |
1716 | } | |
1717 | fcoe_ethdrv_get(netdev); | |
1718 | ||
030f4e00 CL |
1719 | fcoe = fcoe_interface_create(netdev); |
1720 | if (!fcoe) { | |
1721 | rc = -ENOMEM; | |
1722 | goto out_putdev; | |
1723 | } | |
1724 | ||
1725 | lport = fcoe_if_create(fcoe, &netdev->dev); | |
af7f85d9 | 1726 | if (IS_ERR(lport)) { |
d5488eb9 | 1727 | printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", |
85b4aa49 RL |
1728 | netdev->name); |
1729 | fcoe_ethdrv_put(netdev); | |
1730 | rc = -EIO; | |
030f4e00 | 1731 | goto out_free; |
85b4aa49 | 1732 | } |
030f4e00 CL |
1733 | |
1734 | dev_put(netdev); | |
1735 | return 0; | |
1736 | ||
1737 | out_free: | |
1738 | fcoe_interface_put(fcoe); | |
85b4aa49 RL |
1739 | out_putdev: |
1740 | dev_put(netdev); | |
1741 | out_nodev: | |
1742 | return rc; | |
1743 | } | |
1744 | ||
1745 | module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR); | |
1746 | __MODULE_PARM_TYPE(create, "string"); | |
014f5c3f | 1747 | MODULE_PARM_DESC(create, "Create fcoe fcoe using net device passed in."); |
85b4aa49 RL |
1748 | module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR); |
1749 | __MODULE_PARM_TYPE(destroy, "string"); | |
014f5c3f | 1750 | MODULE_PARM_DESC(destroy, "Destroy fcoe fcoe"); |
85b4aa49 | 1751 | |
34f42a07 RL |
1752 | /** |
1753 | * fcoe_link_ok() - Check if link is ok for the fc_lport | |
85b4aa49 RL |
1754 | * @lp: ptr to the fc_lport |
1755 | * | |
1756 | * Any permanently-disqualifying conditions have been previously checked. | |
1757 | * This also updates the speed setting, which may change with link for 100/1000. | |
1758 | * | |
1759 | * This function should probably be checking for PAUSE support at some point | |
1760 | * in the future. Currently Per-priority-pause is not determinable using | |
1761 | * ethtool, so we shouldn't be restrictive until that problem is resolved. | |
1762 | * | |
1763 | * Returns: 0 if link is OK for use by FCoE. | |
1764 | * | |
1765 | */ | |
1766 | int fcoe_link_ok(struct fc_lport *lp) | |
1767 | { | |
014f5c3f | 1768 | struct fcoe_port *port = lport_priv(lp); |
25024989 | 1769 | struct net_device *dev = port->fcoe->netdev; |
85b4aa49 | 1770 | struct ethtool_cmd ecmd = { ETHTOOL_GSET }; |
85b4aa49 | 1771 | |
2f718d64 YZ |
1772 | if ((dev->flags & IFF_UP) && netif_carrier_ok(dev) && |
1773 | (!dev_ethtool_get_settings(dev, &ecmd))) { | |
1774 | lp->link_supported_speeds &= | |
1775 | ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT); | |
1776 | if (ecmd.supported & (SUPPORTED_1000baseT_Half | | |
1777 | SUPPORTED_1000baseT_Full)) | |
1778 | lp->link_supported_speeds |= FC_PORTSPEED_1GBIT; | |
1779 | if (ecmd.supported & SUPPORTED_10000baseT_Full) | |
1780 | lp->link_supported_speeds |= | |
1781 | FC_PORTSPEED_10GBIT; | |
1782 | if (ecmd.speed == SPEED_1000) | |
1783 | lp->link_speed = FC_PORTSPEED_1GBIT; | |
1784 | if (ecmd.speed == SPEED_10000) | |
1785 | lp->link_speed = FC_PORTSPEED_10GBIT; | |
85b4aa49 | 1786 | |
2f718d64 YZ |
1787 | return 0; |
1788 | } | |
1789 | return -1; | |
85b4aa49 | 1790 | } |
85b4aa49 | 1791 | |
34f42a07 RL |
1792 | /** |
1793 | * fcoe_percpu_clean() - Clear the pending skbs for an lport | |
85b4aa49 RL |
1794 | * @lp: the fc_lport |
1795 | */ | |
1796 | void fcoe_percpu_clean(struct fc_lport *lp) | |
1797 | { | |
85b4aa49 RL |
1798 | struct fcoe_percpu_s *pp; |
1799 | struct fcoe_rcv_info *fr; | |
1800 | struct sk_buff_head *list; | |
1801 | struct sk_buff *skb, *next; | |
1802 | struct sk_buff *head; | |
5e5e92df | 1803 | unsigned int cpu; |
85b4aa49 | 1804 | |
5e5e92df RL |
1805 | for_each_possible_cpu(cpu) { |
1806 | pp = &per_cpu(fcoe_percpu, cpu); | |
1807 | spin_lock_bh(&pp->fcoe_rx_list.lock); | |
1808 | list = &pp->fcoe_rx_list; | |
1809 | head = list->next; | |
1810 | for (skb = head; skb != (struct sk_buff *)list; | |
1811 | skb = next) { | |
1812 | next = skb->next; | |
1813 | fr = fcoe_dev_from_skb(skb); | |
1814 | if (fr->fr_dev == lp) { | |
1815 | __skb_unlink(skb, list); | |
1816 | kfree_skb(skb); | |
85b4aa49 | 1817 | } |
85b4aa49 | 1818 | } |
5e5e92df | 1819 | spin_unlock_bh(&pp->fcoe_rx_list.lock); |
85b4aa49 RL |
1820 | } |
1821 | } | |
85b4aa49 RL |
1822 | |
1823 | /** | |
34f42a07 | 1824 | * fcoe_clean_pending_queue() - Dequeue a skb and free it |
85b4aa49 RL |
1825 | * @lp: the corresponding fc_lport |
1826 | * | |
1827 | * Returns: none | |
34f42a07 | 1828 | */ |
85b4aa49 RL |
1829 | void fcoe_clean_pending_queue(struct fc_lport *lp) |
1830 | { | |
014f5c3f | 1831 | struct fcoe_port *port = lport_priv(lp); |
85b4aa49 RL |
1832 | struct sk_buff *skb; |
1833 | ||
014f5c3f CL |
1834 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
1835 | while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) { | |
1836 | spin_unlock_bh(&port->fcoe_pending_queue.lock); | |
85b4aa49 | 1837 | kfree_skb(skb); |
014f5c3f | 1838 | spin_lock_bh(&port->fcoe_pending_queue.lock); |
85b4aa49 | 1839 | } |
014f5c3f | 1840 | spin_unlock_bh(&port->fcoe_pending_queue.lock); |
85b4aa49 | 1841 | } |
85b4aa49 | 1842 | |
34f42a07 RL |
1843 | /** |
1844 | * fcoe_reset() - Resets the fcoe | |
85b4aa49 RL |
1845 | * @shost: shost the reset is from |
1846 | * | |
1847 | * Returns: always 0 | |
1848 | */ | |
1849 | int fcoe_reset(struct Scsi_Host *shost) | |
1850 | { | |
1851 | struct fc_lport *lport = shost_priv(shost); | |
1852 | fc_lport_reset(lport); | |
1853 | return 0; | |
1854 | } | |
85b4aa49 | 1855 | |
34f42a07 | 1856 | /** |
014f5c3f | 1857 | * fcoe_hostlist_lookup_port() - find the corresponding lport by a given device |
dd3fd72e | 1858 | * @dev: this is currently ptr to net_device |
85b4aa49 | 1859 | * |
e8af4d43 VD |
1860 | * Called with fcoe_hostlist_lock held. |
1861 | * | |
014f5c3f | 1862 | * Returns: NULL or the located fcoe_port |
85b4aa49 | 1863 | */ |
014f5c3f CL |
1864 | static struct fcoe_interface * |
1865 | fcoe_hostlist_lookup_port(const struct net_device *dev) | |
85b4aa49 | 1866 | { |
014f5c3f | 1867 | struct fcoe_interface *fcoe; |
85b4aa49 | 1868 | |
014f5c3f | 1869 | list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
25024989 | 1870 | if (fcoe->netdev == dev) |
014f5c3f | 1871 | return fcoe; |
85b4aa49 | 1872 | } |
85b4aa49 RL |
1873 | return NULL; |
1874 | } | |
1875 | ||
34f42a07 RL |
1876 | /** |
1877 | * fcoe_hostlist_lookup() - Find the corresponding lport by netdev | |
85b4aa49 RL |
1878 | * @netdev: ptr to net_device |
1879 | * | |
1880 | * Returns: 0 for success | |
1881 | */ | |
1882 | struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) | |
1883 | { | |
014f5c3f | 1884 | struct fcoe_interface *fcoe; |
85b4aa49 | 1885 | |
e8af4d43 | 1886 | read_lock(&fcoe_hostlist_lock); |
014f5c3f | 1887 | fcoe = fcoe_hostlist_lookup_port(netdev); |
e8af4d43 | 1888 | read_unlock(&fcoe_hostlist_lock); |
85b4aa49 | 1889 | |
3fe9a0ba | 1890 | return (fcoe) ? fcoe->ctlr.lp : NULL; |
85b4aa49 | 1891 | } |
85b4aa49 | 1892 | |
34f42a07 RL |
1893 | /** |
1894 | * fcoe_hostlist_add() - Add a lport to lports list | |
dd3fd72e | 1895 | * @lp: ptr to the fc_lport to be added |
85b4aa49 | 1896 | * |
e8af4d43 VD |
1897 | * Called with write fcoe_hostlist_lock held. |
1898 | * | |
85b4aa49 RL |
1899 | * Returns: 0 for success |
1900 | */ | |
014f5c3f | 1901 | int fcoe_hostlist_add(const struct fc_lport *lport) |
85b4aa49 | 1902 | { |
014f5c3f CL |
1903 | struct fcoe_interface *fcoe; |
1904 | struct fcoe_port *port; | |
1905 | ||
1906 | fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); | |
1907 | if (!fcoe) { | |
1908 | port = lport_priv(lport); | |
1909 | fcoe = port->fcoe; | |
1910 | list_add_tail(&fcoe->list, &fcoe_hostlist); | |
85b4aa49 RL |
1911 | } |
1912 | return 0; | |
1913 | } | |
85b4aa49 | 1914 | |
34f42a07 RL |
1915 | /** |
1916 | * fcoe_hostlist_remove() - remove a lport from lports list | |
dd3fd72e | 1917 | * @lp: ptr to the fc_lport to be removed |
85b4aa49 RL |
1918 | * |
1919 | * Returns: 0 for success | |
1920 | */ | |
014f5c3f | 1921 | int fcoe_hostlist_remove(const struct fc_lport *lport) |
85b4aa49 | 1922 | { |
014f5c3f | 1923 | struct fcoe_interface *fcoe; |
85b4aa49 | 1924 | |
e8af4d43 | 1925 | write_lock_bh(&fcoe_hostlist_lock); |
014f5c3f CL |
1926 | fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); |
1927 | BUG_ON(!fcoe); | |
1928 | list_del(&fcoe->list); | |
85b4aa49 RL |
1929 | write_unlock_bh(&fcoe_hostlist_lock); |
1930 | ||
1931 | return 0; | |
1932 | } | |
85b4aa49 | 1933 | |
85b4aa49 | 1934 | /** |
34f42a07 | 1935 | * fcoe_init() - fcoe module loading initialization |
85b4aa49 | 1936 | * |
85b4aa49 | 1937 | * Returns 0 on success, negative on failure |
34f42a07 | 1938 | */ |
85b4aa49 RL |
1939 | static int __init fcoe_init(void) |
1940 | { | |
38eccabd | 1941 | unsigned int cpu; |
8976f424 | 1942 | int rc = 0; |
85b4aa49 RL |
1943 | struct fcoe_percpu_s *p; |
1944 | ||
38eccabd | 1945 | for_each_possible_cpu(cpu) { |
5e5e92df | 1946 | p = &per_cpu(fcoe_percpu, cpu); |
38eccabd RL |
1947 | skb_queue_head_init(&p->fcoe_rx_list); |
1948 | } | |
1949 | ||
8976f424 RL |
1950 | for_each_online_cpu(cpu) |
1951 | fcoe_percpu_thread_create(cpu); | |
85b4aa49 | 1952 | |
8976f424 RL |
1953 | /* Initialize per CPU interrupt thread */ |
1954 | rc = register_hotcpu_notifier(&fcoe_cpu_notifier); | |
1955 | if (rc) | |
1956 | goto out_free; | |
85b4aa49 | 1957 | |
8976f424 | 1958 | /* Setup link change notification */ |
85b4aa49 RL |
1959 | fcoe_dev_setup(); |
1960 | ||
5892c32f CL |
1961 | rc = fcoe_if_init(); |
1962 | if (rc) | |
1963 | goto out_free; | |
85b4aa49 RL |
1964 | |
1965 | return 0; | |
8976f424 RL |
1966 | |
1967 | out_free: | |
1968 | for_each_online_cpu(cpu) { | |
1969 | fcoe_percpu_thread_destroy(cpu); | |
1970 | } | |
1971 | ||
1972 | return rc; | |
85b4aa49 RL |
1973 | } |
1974 | module_init(fcoe_init); | |
1975 | ||
1976 | /** | |
34f42a07 | 1977 | * fcoe_exit() - fcoe module unloading cleanup |
85b4aa49 RL |
1978 | * |
1979 | * Returns 0 on success, negative on failure | |
34f42a07 | 1980 | */ |
85b4aa49 RL |
1981 | static void __exit fcoe_exit(void) |
1982 | { | |
5e5e92df | 1983 | unsigned int cpu; |
014f5c3f | 1984 | struct fcoe_interface *fcoe, *tmp; |
85b4aa49 | 1985 | |
85b4aa49 RL |
1986 | fcoe_dev_cleanup(); |
1987 | ||
5919a595 | 1988 | /* releases the associated fcoe hosts */ |
014f5c3f | 1989 | list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) |
3fe9a0ba | 1990 | fcoe_if_destroy(fcoe->ctlr.lp); |
85b4aa49 | 1991 | |
8976f424 RL |
1992 | unregister_hotcpu_notifier(&fcoe_cpu_notifier); |
1993 | ||
014f5c3f | 1994 | for_each_online_cpu(cpu) |
8976f424 | 1995 | fcoe_percpu_thread_destroy(cpu); |
85b4aa49 | 1996 | |
7f349142 VD |
1997 | /* detach from scsi transport */ |
1998 | fcoe_if_exit(); | |
85b4aa49 RL |
1999 | } |
2000 | module_exit(fcoe_exit); |