]>
Commit | Line | Data |
---|---|---|
c72dfae2 SB |
1 | /* |
2 | * CAIF Interface registration. | |
3 | * Copyright (C) ST-Ericsson AB 2010 | |
4 | * Author: Sjur Brendeland/sjur.brandeland@stericsson.com | |
5 | * License terms: GNU General Public License (GPL) version 2 | |
6 | * | |
7 | * Borrowed heavily from file: pn_dev.c. Thanks to | |
8 | * Remi Denis-Courmont <remi.denis-courmont@nokia.com> | |
9 | * and Sakari Ailus <sakari.ailus@nokia.com> | |
10 | */ | |
11 | ||
b31fa5ba JP |
12 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__ |
13 | ||
c72dfae2 SB |
14 | #include <linux/kernel.h> |
15 | #include <linux/if_arp.h> | |
16 | #include <linux/net.h> | |
17 | #include <linux/netdevice.h> | |
bd30ce4b | 18 | #include <linux/mutex.h> |
3a9a231d | 19 | #include <linux/module.h> |
0e4c7d85 | 20 | #include <linux/spinlock.h> |
c72dfae2 SB |
21 | #include <net/netns/generic.h> |
22 | #include <net/net_namespace.h> | |
23 | #include <net/pkt_sched.h> | |
24 | #include <net/caif/caif_device.h> | |
c72dfae2 SB |
25 | #include <net/caif/caif_layer.h> |
26 | #include <net/caif/cfpkt.h> | |
27 | #include <net/caif/cfcnfg.h> | |
7c18d220 | 28 | #include <net/caif/cfserl.h> |
c72dfae2 SB |
29 | |
30 | MODULE_LICENSE("GPL"); | |
c72dfae2 SB |
31 | |
32 | /* Used for local tracking of the CAIF net devices */ | |
33 | struct caif_device_entry { | |
34 | struct cflayer layer; | |
35 | struct list_head list; | |
c72dfae2 | 36 | struct net_device *netdev; |
bd30ce4b | 37 | int __percpu *pcpu_refcnt; |
0e4c7d85 | 38 | spinlock_t flow_lock; |
7d311304 | 39 | struct sk_buff *xoff_skb; |
40 | void (*xoff_skb_dtor)(struct sk_buff *skb); | |
0e4c7d85 | 41 | bool xoff; |
c72dfae2 SB |
42 | }; |
43 | ||
44 | struct caif_device_entry_list { | |
45 | struct list_head list; | |
46 | /* Protects simulanous deletes in list */ | |
bd30ce4b | 47 | struct mutex lock; |
c72dfae2 SB |
48 | }; |
49 | ||
50 | struct caif_net { | |
bee925db | 51 | struct cfcnfg *cfg; |
c72dfae2 SB |
52 | struct caif_device_entry_list caifdevs; |
53 | }; | |
54 | ||
55 | static int caif_net_id; | |
0e4c7d85 | 56 | static int q_high = 50; /* Percent */ |
bee925db | 57 | |
58 | struct cfcnfg *get_cfcnfg(struct net *net) | |
59 | { | |
60 | struct caif_net *caifn; | |
bee925db | 61 | caifn = net_generic(net, caif_net_id); |
bee925db | 62 | return caifn->cfg; |
63 | } | |
64 | EXPORT_SYMBOL(get_cfcnfg); | |
c72dfae2 SB |
65 | |
66 | static struct caif_device_entry_list *caif_device_list(struct net *net) | |
67 | { | |
68 | struct caif_net *caifn; | |
c72dfae2 | 69 | caifn = net_generic(net, caif_net_id); |
c72dfae2 SB |
70 | return &caifn->caifdevs; |
71 | } | |
72 | ||
bd30ce4b | 73 | static void caifd_put(struct caif_device_entry *e) |
74 | { | |
933393f5 | 75 | this_cpu_dec(*e->pcpu_refcnt); |
bd30ce4b | 76 | } |
77 | ||
78 | static void caifd_hold(struct caif_device_entry *e) | |
79 | { | |
933393f5 | 80 | this_cpu_inc(*e->pcpu_refcnt); |
bd30ce4b | 81 | } |
82 | ||
83 | static int caifd_refcnt_read(struct caif_device_entry *e) | |
84 | { | |
85 | int i, refcnt = 0; | |
86 | for_each_possible_cpu(i) | |
87 | refcnt += *per_cpu_ptr(e->pcpu_refcnt, i); | |
88 | return refcnt; | |
89 | } | |
90 | ||
c72dfae2 SB |
91 | /* Allocate new CAIF device. */ |
92 | static struct caif_device_entry *caif_device_alloc(struct net_device *dev) | |
93 | { | |
94 | struct caif_device_entry_list *caifdevs; | |
95 | struct caif_device_entry *caifd; | |
bd30ce4b | 96 | |
c72dfae2 | 97 | caifdevs = caif_device_list(dev_net(dev)); |
bd30ce4b | 98 | |
4fb66b82 | 99 | caifd = kzalloc(sizeof(*caifd), GFP_KERNEL); |
c72dfae2 SB |
100 | if (!caifd) |
101 | return NULL; | |
bd30ce4b | 102 | caifd->pcpu_refcnt = alloc_percpu(int); |
4fb66b82 ED |
103 | if (!caifd->pcpu_refcnt) { |
104 | kfree(caifd); | |
105 | return NULL; | |
106 | } | |
c72dfae2 | 107 | caifd->netdev = dev; |
bd30ce4b | 108 | dev_hold(dev); |
c72dfae2 SB |
109 | return caifd; |
110 | } | |
111 | ||
112 | static struct caif_device_entry *caif_get(struct net_device *dev) | |
113 | { | |
114 | struct caif_device_entry_list *caifdevs = | |
115 | caif_device_list(dev_net(dev)); | |
116 | struct caif_device_entry *caifd; | |
7c18d220 | 117 | |
bd30ce4b | 118 | list_for_each_entry_rcu(caifd, &caifdevs->list, list) { |
c72dfae2 SB |
119 | if (caifd->netdev == dev) |
120 | return caifd; | |
121 | } | |
122 | return NULL; | |
123 | } | |
124 | ||
0e4c7d85 | 125 | void caif_flow_cb(struct sk_buff *skb) |
126 | { | |
127 | struct caif_device_entry *caifd; | |
7d311304 | 128 | void (*dtor)(struct sk_buff *skb) = NULL; |
0e4c7d85 | 129 | bool send_xoff; |
130 | ||
131 | WARN_ON(skb->dev == NULL); | |
132 | ||
133 | rcu_read_lock(); | |
134 | caifd = caif_get(skb->dev); | |
135 | caifd_hold(caifd); | |
136 | rcu_read_unlock(); | |
137 | ||
138 | spin_lock_bh(&caifd->flow_lock); | |
139 | send_xoff = caifd->xoff; | |
140 | caifd->xoff = 0; | |
59f608d8 | 141 | dtor = caifd->xoff_skb_dtor; |
142 | ||
143 | if (WARN_ON(caifd->xoff_skb != skb)) | |
144 | skb = NULL; | |
145 | ||
146 | caifd->xoff_skb = NULL; | |
147 | caifd->xoff_skb_dtor = NULL; | |
148 | ||
0e4c7d85 | 149 | spin_unlock_bh(&caifd->flow_lock); |
150 | ||
59f608d8 | 151 | if (dtor && skb) |
7d311304 | 152 | dtor(skb); |
153 | ||
0e4c7d85 | 154 | if (send_xoff) |
155 | caifd->layer.up-> | |
156 | ctrlcmd(caifd->layer.up, | |
157 | _CAIF_CTRLCMD_PHYIF_FLOW_ON_IND, | |
158 | caifd->layer.id); | |
159 | caifd_put(caifd); | |
160 | } | |
161 | ||
c72dfae2 SB |
162 | static int transmit(struct cflayer *layer, struct cfpkt *pkt) |
163 | { | |
0e4c7d85 | 164 | int err, high = 0, qlen = 0; |
c72dfae2 SB |
165 | struct caif_device_entry *caifd = |
166 | container_of(layer, struct caif_device_entry, layer); | |
4dd820c0 | 167 | struct sk_buff *skb; |
0e4c7d85 | 168 | struct netdev_queue *txq; |
169 | ||
170 | rcu_read_lock_bh(); | |
4dd820c0 | 171 | |
c72dfae2 SB |
172 | skb = cfpkt_tonative(pkt); |
173 | skb->dev = caifd->netdev; | |
7c18d220 | 174 | skb_reset_network_header(skb); |
175 | skb->protocol = htons(ETH_P_CAIF); | |
0e4c7d85 | 176 | |
177 | /* Check if we need to handle xoff */ | |
178 | if (likely(caifd->netdev->tx_queue_len == 0)) | |
179 | goto noxoff; | |
180 | ||
181 | if (unlikely(caifd->xoff)) | |
182 | goto noxoff; | |
183 | ||
184 | if (likely(!netif_queue_stopped(caifd->netdev))) { | |
185 | /* If we run with a TX queue, check if the queue is too long*/ | |
186 | txq = netdev_get_tx_queue(skb->dev, 0); | |
187 | qlen = qdisc_qlen(rcu_dereference_bh(txq->qdisc)); | |
188 | ||
189 | if (likely(qlen == 0)) | |
190 | goto noxoff; | |
191 | ||
192 | high = (caifd->netdev->tx_queue_len * q_high) / 100; | |
193 | if (likely(qlen < high)) | |
194 | goto noxoff; | |
195 | } | |
196 | ||
197 | /* Hold lock while accessing xoff */ | |
198 | spin_lock_bh(&caifd->flow_lock); | |
199 | if (caifd->xoff) { | |
200 | spin_unlock_bh(&caifd->flow_lock); | |
201 | goto noxoff; | |
202 | } | |
203 | ||
204 | /* | |
205 | * Handle flow off, we do this by temporary hi-jacking this | |
206 | * skb's destructor function, and replace it with our own | |
207 | * flow-on callback. The callback will set flow-on and call | |
208 | * the original destructor. | |
209 | */ | |
210 | ||
211 | pr_debug("queue has stopped(%d) or is full (%d > %d)\n", | |
212 | netif_queue_stopped(caifd->netdev), | |
213 | qlen, high); | |
214 | caifd->xoff = 1; | |
7d311304 | 215 | caifd->xoff_skb = skb; |
216 | caifd->xoff_skb_dtor = skb->destructor; | |
217 | skb->destructor = caif_flow_cb; | |
0e4c7d85 | 218 | spin_unlock_bh(&caifd->flow_lock); |
0e4c7d85 | 219 | |
220 | caifd->layer.up->ctrlcmd(caifd->layer.up, | |
221 | _CAIF_CTRLCMD_PHYIF_FLOW_OFF_IND, | |
222 | caifd->layer.id); | |
223 | noxoff: | |
224 | rcu_read_unlock_bh(); | |
4dd820c0 | 225 | |
c85c2951 | 226 | err = dev_queue_xmit(skb); |
227 | if (err > 0) | |
228 | err = -EIO; | |
c72dfae2 | 229 | |
c85c2951 | 230 | return err; |
c72dfae2 SB |
231 | } |
232 | ||
c72dfae2 | 233 | /* |
bd30ce4b | 234 | * Stuff received packets into the CAIF stack. |
c72dfae2 SB |
235 | * On error, returns non-zero and releases the skb. |
236 | */ | |
237 | static int receive(struct sk_buff *skb, struct net_device *dev, | |
238 | struct packet_type *pkttype, struct net_device *orig_dev) | |
239 | { | |
c72dfae2 SB |
240 | struct cfpkt *pkt; |
241 | struct caif_device_entry *caifd; | |
69c867c9 | 242 | int err; |
bd30ce4b | 243 | |
c72dfae2 | 244 | pkt = cfpkt_fromnative(CAIF_DIR_IN, skb); |
bd30ce4b | 245 | |
246 | rcu_read_lock(); | |
c72dfae2 | 247 | caifd = caif_get(dev); |
c72dfae2 | 248 | |
bd30ce4b | 249 | if (!caifd || !caifd->layer.up || !caifd->layer.up->receive || |
250 | !netif_oper_up(caifd->netdev)) { | |
251 | rcu_read_unlock(); | |
252 | kfree_skb(skb); | |
c72dfae2 | 253 | return NET_RX_DROP; |
bd30ce4b | 254 | } |
255 | ||
256 | /* Hold reference to netdevice while using CAIF stack */ | |
257 | caifd_hold(caifd); | |
258 | rcu_read_unlock(); | |
c72dfae2 | 259 | |
69c867c9 | 260 | err = caifd->layer.up->receive(caifd->layer.up, pkt); |
261 | ||
262 | /* For -EILSEQ the packet is not freed so so it now */ | |
263 | if (err == -EILSEQ) | |
264 | cfpkt_destroy(pkt); | |
bd30ce4b | 265 | |
266 | /* Release reference to stack upwards */ | |
267 | caifd_put(caifd); | |
7c18d220 | 268 | |
269 | if (err != 0) | |
270 | err = NET_RX_DROP; | |
271 | return err; | |
c72dfae2 SB |
272 | } |
273 | ||
274 | static struct packet_type caif_packet_type __read_mostly = { | |
275 | .type = cpu_to_be16(ETH_P_CAIF), | |
276 | .func = receive, | |
277 | }; | |
278 | ||
279 | static void dev_flowctrl(struct net_device *dev, int on) | |
280 | { | |
bd30ce4b | 281 | struct caif_device_entry *caifd; |
282 | ||
283 | rcu_read_lock(); | |
284 | ||
285 | caifd = caif_get(dev); | |
286 | if (!caifd || !caifd->layer.up || !caifd->layer.up->ctrlcmd) { | |
287 | rcu_read_unlock(); | |
c72dfae2 | 288 | return; |
bd30ce4b | 289 | } |
290 | ||
291 | caifd_hold(caifd); | |
292 | rcu_read_unlock(); | |
c72dfae2 SB |
293 | |
294 | caifd->layer.up->ctrlcmd(caifd->layer.up, | |
295 | on ? | |
296 | _CAIF_CTRLCMD_PHYIF_FLOW_ON_IND : | |
297 | _CAIF_CTRLCMD_PHYIF_FLOW_OFF_IND, | |
298 | caifd->layer.id); | |
bd30ce4b | 299 | caifd_put(caifd); |
c72dfae2 SB |
300 | } |
301 | ||
7c18d220 | 302 | void caif_enroll_dev(struct net_device *dev, struct caif_dev_common *caifdev, |
303 | struct cflayer *link_support, int head_room, | |
304 | struct cflayer **layer, int (**rcv_func)( | |
305 | struct sk_buff *, struct net_device *, | |
306 | struct packet_type *, struct net_device *)) | |
307 | { | |
308 | struct caif_device_entry *caifd; | |
309 | enum cfcnfg_phy_preference pref; | |
310 | struct cfcnfg *cfg = get_cfcnfg(dev_net(dev)); | |
311 | struct caif_device_entry_list *caifdevs; | |
312 | ||
313 | caifdevs = caif_device_list(dev_net(dev)); | |
7c18d220 | 314 | caifd = caif_device_alloc(dev); |
315 | if (!caifd) | |
316 | return; | |
317 | *layer = &caifd->layer; | |
0e4c7d85 | 318 | spin_lock_init(&caifd->flow_lock); |
7c18d220 | 319 | |
320 | switch (caifdev->link_select) { | |
321 | case CAIF_LINK_HIGH_BANDW: | |
322 | pref = CFPHYPREF_HIGH_BW; | |
323 | break; | |
324 | case CAIF_LINK_LOW_LATENCY: | |
325 | pref = CFPHYPREF_LOW_LAT; | |
326 | break; | |
327 | default: | |
328 | pref = CFPHYPREF_HIGH_BW; | |
329 | break; | |
330 | } | |
331 | mutex_lock(&caifdevs->lock); | |
332 | list_add_rcu(&caifd->list, &caifdevs->list); | |
333 | ||
334 | strncpy(caifd->layer.name, dev->name, | |
335 | sizeof(caifd->layer.name) - 1); | |
336 | caifd->layer.name[sizeof(caifd->layer.name) - 1] = 0; | |
337 | caifd->layer.transmit = transmit; | |
338 | cfcnfg_add_phy_layer(cfg, | |
339 | dev, | |
340 | &caifd->layer, | |
341 | pref, | |
342 | link_support, | |
343 | caifdev->use_fcs, | |
344 | head_room); | |
345 | mutex_unlock(&caifdevs->lock); | |
346 | if (rcv_func) | |
347 | *rcv_func = receive; | |
348 | } | |
7ad65bf6 | 349 | EXPORT_SYMBOL(caif_enroll_dev); |
7c18d220 | 350 | |
c72dfae2 SB |
351 | /* notify Caif of device events */ |
352 | static int caif_device_notify(struct notifier_block *me, unsigned long what, | |
353 | void *arg) | |
354 | { | |
355 | struct net_device *dev = arg; | |
356 | struct caif_device_entry *caifd = NULL; | |
357 | struct caif_dev_common *caifdev; | |
bee925db | 358 | struct cfcnfg *cfg; |
7c18d220 | 359 | struct cflayer *layer, *link_support; |
360 | int head_room = 0; | |
08613e46 | 361 | struct caif_device_entry_list *caifdevs; |
c72dfae2 | 362 | |
bee925db | 363 | cfg = get_cfcnfg(dev_net(dev)); |
7c18d220 | 364 | caifdevs = caif_device_list(dev_net(dev)); |
bee925db | 365 | |
7c18d220 | 366 | caifd = caif_get(dev); |
367 | if (caifd == NULL && dev->type != ARPHRD_CAIF) | |
368 | return 0; | |
08613e46 | 369 | |
c72dfae2 SB |
370 | switch (what) { |
371 | case NETDEV_REGISTER: | |
7c18d220 | 372 | if (caifd != NULL) |
373 | break; | |
bd30ce4b | 374 | |
c72dfae2 | 375 | caifdev = netdev_priv(dev); |
c72dfae2 | 376 | |
7c18d220 | 377 | link_support = NULL; |
378 | if (caifdev->use_frag) { | |
379 | head_room = 1; | |
380 | link_support = cfserl_create(dev->ifindex, | |
e977b4cf | 381 | caifdev->use_stx); |
7c18d220 | 382 | if (!link_support) { |
383 | pr_warn("Out of memory\n"); | |
384 | break; | |
385 | } | |
c72dfae2 | 386 | } |
7c18d220 | 387 | caif_enroll_dev(dev, caifdev, link_support, head_room, |
388 | &layer, NULL); | |
389 | caifdev->flowctrl = dev_flowctrl; | |
c72dfae2 SB |
390 | break; |
391 | ||
bd30ce4b | 392 | case NETDEV_UP: |
393 | rcu_read_lock(); | |
394 | ||
c72dfae2 | 395 | caifd = caif_get(dev); |
bd30ce4b | 396 | if (caifd == NULL) { |
397 | rcu_read_unlock(); | |
c72dfae2 | 398 | break; |
bd30ce4b | 399 | } |
c72dfae2 | 400 | |
0e4c7d85 | 401 | caifd->xoff = 0; |
bd30ce4b | 402 | cfcnfg_set_phy_state(cfg, &caifd->layer, true); |
403 | rcu_read_unlock(); | |
c72dfae2 | 404 | |
c72dfae2 SB |
405 | break; |
406 | ||
407 | case NETDEV_DOWN: | |
bd30ce4b | 408 | rcu_read_lock(); |
409 | ||
c72dfae2 | 410 | caifd = caif_get(dev); |
bd30ce4b | 411 | if (!caifd || !caifd->layer.up || !caifd->layer.up->ctrlcmd) { |
412 | rcu_read_unlock(); | |
413 | return -EINVAL; | |
414 | } | |
415 | ||
416 | cfcnfg_set_phy_state(cfg, &caifd->layer, false); | |
417 | caifd_hold(caifd); | |
418 | rcu_read_unlock(); | |
419 | ||
420 | caifd->layer.up->ctrlcmd(caifd->layer.up, | |
421 | _CAIF_CTRLCMD_PHYIF_DOWN_IND, | |
422 | caifd->layer.id); | |
7d311304 | 423 | |
424 | spin_lock_bh(&caifd->flow_lock); | |
425 | ||
426 | /* | |
427 | * Replace our xoff-destructor with original destructor. | |
428 | * We trust that skb->destructor *always* is called before | |
429 | * the skb reference is invalid. The hijacked SKB destructor | |
430 | * takes the flow_lock so manipulating the skb->destructor here | |
431 | * should be safe. | |
432 | */ | |
433 | if (caifd->xoff_skb_dtor != NULL && caifd->xoff_skb != NULL) | |
434 | caifd->xoff_skb->destructor = caifd->xoff_skb_dtor; | |
435 | ||
436 | caifd->xoff = 0; | |
437 | caifd->xoff_skb_dtor = NULL; | |
438 | caifd->xoff_skb = NULL; | |
439 | ||
440 | spin_unlock_bh(&caifd->flow_lock); | |
bd30ce4b | 441 | caifd_put(caifd); |
c72dfae2 SB |
442 | break; |
443 | ||
444 | case NETDEV_UNREGISTER: | |
bd30ce4b | 445 | mutex_lock(&caifdevs->lock); |
446 | ||
c72dfae2 | 447 | caifd = caif_get(dev); |
bd30ce4b | 448 | if (caifd == NULL) { |
449 | mutex_unlock(&caifdevs->lock); | |
f2527ec4 | 450 | break; |
bd30ce4b | 451 | } |
452 | list_del_rcu(&caifd->list); | |
453 | ||
454 | /* | |
455 | * NETDEV_UNREGISTER is called repeatedly until all reference | |
456 | * counts for the net-device are released. If references to | |
457 | * caifd is taken, simply ignore NETDEV_UNREGISTER and wait for | |
458 | * the next call to NETDEV_UNREGISTER. | |
459 | * | |
460 | * If any packets are in flight down the CAIF Stack, | |
461 | * cfcnfg_del_phy_layer will return nonzero. | |
462 | * If no packets are in flight, the CAIF Stack associated | |
463 | * with the net-device un-registering is freed. | |
464 | */ | |
465 | ||
466 | if (caifd_refcnt_read(caifd) != 0 || | |
467 | cfcnfg_del_phy_layer(cfg, &caifd->layer) != 0) { | |
468 | ||
469 | pr_info("Wait for device inuse\n"); | |
470 | /* Enrole device if CAIF Stack is still in use */ | |
471 | list_add_rcu(&caifd->list, &caifdevs->list); | |
472 | mutex_unlock(&caifdevs->lock); | |
473 | break; | |
474 | } | |
475 | ||
476 | synchronize_rcu(); | |
477 | dev_put(caifd->netdev); | |
478 | free_percpu(caifd->pcpu_refcnt); | |
479 | kfree(caifd); | |
480 | ||
481 | mutex_unlock(&caifdevs->lock); | |
c72dfae2 SB |
482 | break; |
483 | } | |
484 | return 0; | |
485 | } | |
486 | ||
487 | static struct notifier_block caif_device_notifier = { | |
488 | .notifier_call = caif_device_notify, | |
489 | .priority = 0, | |
490 | }; | |
491 | ||
c72dfae2 SB |
492 | /* Per-namespace Caif devices handling */ |
493 | static int caif_init_net(struct net *net) | |
494 | { | |
495 | struct caif_net *caifn = net_generic(net, caif_net_id); | |
496 | INIT_LIST_HEAD(&caifn->caifdevs.list); | |
bd30ce4b | 497 | mutex_init(&caifn->caifdevs.lock); |
bee925db | 498 | |
499 | caifn->cfg = cfcnfg_create(); | |
f84ea779 | 500 | if (!caifn->cfg) |
bee925db | 501 | return -ENOMEM; |
bee925db | 502 | |
c72dfae2 SB |
503 | return 0; |
504 | } | |
505 | ||
506 | static void caif_exit_net(struct net *net) | |
507 | { | |
bd30ce4b | 508 | struct caif_device_entry *caifd, *tmp; |
509 | struct caif_device_entry_list *caifdevs = | |
510 | caif_device_list(net); | |
7c18d220 | 511 | struct cfcnfg *cfg = get_cfcnfg(net); |
512 | ||
c72dfae2 | 513 | rtnl_lock(); |
bd30ce4b | 514 | mutex_lock(&caifdevs->lock); |
515 | ||
516 | list_for_each_entry_safe(caifd, tmp, &caifdevs->list, list) { | |
517 | int i = 0; | |
518 | list_del_rcu(&caifd->list); | |
519 | cfcnfg_set_phy_state(cfg, &caifd->layer, false); | |
520 | ||
521 | while (i < 10 && | |
522 | (caifd_refcnt_read(caifd) != 0 || | |
523 | cfcnfg_del_phy_layer(cfg, &caifd->layer) != 0)) { | |
524 | ||
525 | pr_info("Wait for device inuse\n"); | |
526 | msleep(250); | |
527 | i++; | |
528 | } | |
529 | synchronize_rcu(); | |
530 | dev_put(caifd->netdev); | |
531 | free_percpu(caifd->pcpu_refcnt); | |
532 | kfree(caifd); | |
c72dfae2 | 533 | } |
bee925db | 534 | cfcnfg_remove(cfg); |
bd30ce4b | 535 | |
536 | mutex_unlock(&caifdevs->lock); | |
c72dfae2 SB |
537 | rtnl_unlock(); |
538 | } | |
539 | ||
540 | static struct pernet_operations caif_net_ops = { | |
541 | .init = caif_init_net, | |
542 | .exit = caif_exit_net, | |
543 | .id = &caif_net_id, | |
544 | .size = sizeof(struct caif_net), | |
545 | }; | |
546 | ||
547 | /* Initialize Caif devices list */ | |
548 | static int __init caif_device_init(void) | |
549 | { | |
550 | int result; | |
bd30ce4b | 551 | |
8a8ee9af | 552 | result = register_pernet_subsys(&caif_net_ops); |
c72dfae2 | 553 | |
bee925db | 554 | if (result) |
c72dfae2 | 555 | return result; |
bee925db | 556 | |
c72dfae2 | 557 | register_netdevice_notifier(&caif_device_notifier); |
bee925db | 558 | dev_add_pack(&caif_packet_type); |
c72dfae2 SB |
559 | |
560 | return result; | |
c72dfae2 SB |
561 | } |
562 | ||
563 | static void __exit caif_device_exit(void) | |
564 | { | |
8a8ee9af | 565 | unregister_pernet_subsys(&caif_net_ops); |
c72dfae2 | 566 | unregister_netdevice_notifier(&caif_device_notifier); |
bee925db | 567 | dev_remove_pack(&caif_packet_type); |
c72dfae2 SB |
568 | } |
569 | ||
570 | module_init(caif_device_init); | |
571 | module_exit(caif_device_exit); |