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1da177e4 LT |
1 | /********************************************************************* |
2 | * | |
3 | * Filename: irlap.c | |
4 | * Version: 1.0 | |
5 | * Description: IrLAP implementation for Linux | |
6 | * Status: Stable | |
7 | * Author: Dag Brattli <dagb@cs.uit.no> | |
8 | * Created at: Mon Aug 4 20:40:53 1997 | |
9 | * Modified at: Tue Dec 14 09:26:44 1999 | |
10 | * Modified by: Dag Brattli <dagb@cs.uit.no> | |
11 | * | |
12 | * Copyright (c) 1998-1999 Dag Brattli, All Rights Reserved. | |
13 | * Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com> | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or | |
16 | * modify it under the terms of the GNU General Public License as | |
17 | * published by the Free Software Foundation; either version 2 of | |
18 | * the License, or (at your option) any later version. | |
19 | * | |
20 | * This program is distributed in the hope that it will be useful, | |
21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
23 | * GNU General Public License for more details. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public License | |
d3770509 | 26 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
1da177e4 LT |
27 | * |
28 | ********************************************************************/ | |
29 | ||
1da177e4 LT |
30 | #include <linux/slab.h> |
31 | #include <linux/string.h> | |
32 | #include <linux/skbuff.h> | |
33 | #include <linux/delay.h> | |
34 | #include <linux/proc_fs.h> | |
35 | #include <linux/init.h> | |
36 | #include <linux/random.h> | |
37 | #include <linux/module.h> | |
38 | #include <linux/seq_file.h> | |
39 | ||
40 | #include <net/irda/irda.h> | |
41 | #include <net/irda/irda_device.h> | |
42 | #include <net/irda/irqueue.h> | |
43 | #include <net/irda/irlmp.h> | |
44 | #include <net/irda/irlmp_frame.h> | |
45 | #include <net/irda/irlap_frame.h> | |
46 | #include <net/irda/irlap.h> | |
47 | #include <net/irda/timer.h> | |
48 | #include <net/irda/qos.h> | |
49 | ||
50 | static hashbin_t *irlap = NULL; | |
51 | int sysctl_slot_timeout = SLOT_TIMEOUT * 1000 / HZ; | |
52 | ||
53 | /* This is the delay of missed pf period before generating an event | |
54 | * to the application. The spec mandate 3 seconds, but in some cases | |
55 | * it's way too long. - Jean II */ | |
56 | int sysctl_warn_noreply_time = 3; | |
57 | ||
58 | extern void irlap_queue_xmit(struct irlap_cb *self, struct sk_buff *skb); | |
59 | static void __irlap_close(struct irlap_cb *self); | |
60 | static void irlap_init_qos_capabilities(struct irlap_cb *self, | |
61 | struct qos_info *qos_user); | |
62 | ||
63 | #ifdef CONFIG_IRDA_DEBUG | |
36cbd3dc | 64 | static const char *const lap_reasons[] = { |
1da177e4 LT |
65 | "ERROR, NOT USED", |
66 | "LAP_DISC_INDICATION", | |
67 | "LAP_NO_RESPONSE", | |
68 | "LAP_RESET_INDICATION", | |
69 | "LAP_FOUND_NONE", | |
70 | "LAP_MEDIA_BUSY", | |
71 | "LAP_PRIMARY_CONFLICT", | |
72 | "ERROR, NOT USED", | |
73 | }; | |
74 | #endif /* CONFIG_IRDA_DEBUG */ | |
75 | ||
76 | int __init irlap_init(void) | |
77 | { | |
78 | /* Check if the compiler did its job properly. | |
79 | * May happen on some ARM configuration, check with Russell King. */ | |
80 | IRDA_ASSERT(sizeof(struct xid_frame) == 14, ;); | |
81 | IRDA_ASSERT(sizeof(struct test_frame) == 10, ;); | |
82 | IRDA_ASSERT(sizeof(struct ua_frame) == 10, ;); | |
83 | IRDA_ASSERT(sizeof(struct snrm_frame) == 11, ;); | |
84 | ||
85 | /* Allocate master array */ | |
86 | irlap = hashbin_new(HB_LOCK); | |
87 | if (irlap == NULL) { | |
6c91023d JP |
88 | net_err_ratelimited("%s: can't allocate irlap hashbin!\n", |
89 | __func__); | |
1da177e4 LT |
90 | return -ENOMEM; |
91 | } | |
92 | ||
93 | return 0; | |
94 | } | |
95 | ||
75a69ac6 | 96 | void irlap_cleanup(void) |
1da177e4 LT |
97 | { |
98 | IRDA_ASSERT(irlap != NULL, return;); | |
99 | ||
100 | hashbin_delete(irlap, (FREE_FUNC) __irlap_close); | |
101 | } | |
102 | ||
103 | /* | |
104 | * Function irlap_open (driver) | |
105 | * | |
106 | * Initialize IrLAP layer | |
107 | * | |
108 | */ | |
109 | struct irlap_cb *irlap_open(struct net_device *dev, struct qos_info *qos, | |
110 | const char *hw_name) | |
111 | { | |
112 | struct irlap_cb *self; | |
113 | ||
1da177e4 | 114 | /* Initialize the irlap structure. */ |
0da974f4 | 115 | self = kzalloc(sizeof(struct irlap_cb), GFP_KERNEL); |
1da177e4 LT |
116 | if (self == NULL) |
117 | return NULL; | |
118 | ||
1da177e4 LT |
119 | self->magic = LAP_MAGIC; |
120 | ||
121 | /* Make a binding between the layers */ | |
122 | self->netdev = dev; | |
123 | self->qos_dev = qos; | |
124 | /* Copy hardware name */ | |
125 | if(hw_name != NULL) { | |
126 | strlcpy(self->hw_name, hw_name, sizeof(self->hw_name)); | |
127 | } else { | |
128 | self->hw_name[0] = '\0'; | |
129 | } | |
130 | ||
131 | /* FIXME: should we get our own field? */ | |
132 | dev->atalk_ptr = self; | |
133 | ||
134 | self->state = LAP_OFFLINE; | |
135 | ||
136 | /* Initialize transmit queue */ | |
137 | skb_queue_head_init(&self->txq); | |
138 | skb_queue_head_init(&self->txq_ultra); | |
139 | skb_queue_head_init(&self->wx_list); | |
140 | ||
141 | /* My unique IrLAP device address! */ | |
142 | /* We don't want the broadcast address, neither the NULL address | |
143 | * (most often used to signify "invalid"), and we don't want an | |
144 | * address already in use (otherwise connect won't be able | |
145 | * to select the proper link). - Jean II */ | |
146 | do { | |
147 | get_random_bytes(&self->saddr, sizeof(self->saddr)); | |
148 | } while ((self->saddr == 0x0) || (self->saddr == BROADCAST) || | |
149 | (hashbin_lock_find(irlap, self->saddr, NULL)) ); | |
150 | /* Copy to the driver */ | |
151 | memcpy(dev->dev_addr, &self->saddr, 4); | |
152 | ||
153 | init_timer(&self->slot_timer); | |
154 | init_timer(&self->query_timer); | |
155 | init_timer(&self->discovery_timer); | |
156 | init_timer(&self->final_timer); | |
157 | init_timer(&self->poll_timer); | |
158 | init_timer(&self->wd_timer); | |
159 | init_timer(&self->backoff_timer); | |
160 | init_timer(&self->media_busy_timer); | |
161 | ||
162 | irlap_apply_default_connection_parameters(self); | |
163 | ||
25985edc | 164 | self->N3 = 3; /* # connections attempts to try before giving up */ |
1da177e4 LT |
165 | |
166 | self->state = LAP_NDM; | |
167 | ||
168 | hashbin_insert(irlap, (irda_queue_t *) self, self->saddr, NULL); | |
169 | ||
170 | irlmp_register_link(self, self->saddr, &self->notify); | |
171 | ||
172 | return self; | |
173 | } | |
174 | EXPORT_SYMBOL(irlap_open); | |
175 | ||
176 | /* | |
177 | * Function __irlap_close (self) | |
178 | * | |
179 | * Remove IrLAP and all allocated memory. Stop any pending timers. | |
180 | * | |
181 | */ | |
182 | static void __irlap_close(struct irlap_cb *self) | |
183 | { | |
184 | IRDA_ASSERT(self != NULL, return;); | |
185 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
186 | ||
187 | /* Stop timers */ | |
188 | del_timer(&self->slot_timer); | |
189 | del_timer(&self->query_timer); | |
190 | del_timer(&self->discovery_timer); | |
191 | del_timer(&self->final_timer); | |
192 | del_timer(&self->poll_timer); | |
193 | del_timer(&self->wd_timer); | |
194 | del_timer(&self->backoff_timer); | |
195 | del_timer(&self->media_busy_timer); | |
196 | ||
197 | irlap_flush_all_queues(self); | |
198 | ||
199 | self->magic = 0; | |
200 | ||
201 | kfree(self); | |
202 | } | |
203 | ||
204 | /* | |
205 | * Function irlap_close (self) | |
206 | * | |
207 | * Remove IrLAP instance | |
208 | * | |
209 | */ | |
210 | void irlap_close(struct irlap_cb *self) | |
211 | { | |
212 | struct irlap_cb *lap; | |
213 | ||
1da177e4 LT |
214 | IRDA_ASSERT(self != NULL, return;); |
215 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
216 | ||
217 | /* We used to send a LAP_DISC_INDICATION here, but this was | |
218 | * racy. This has been move within irlmp_unregister_link() | |
219 | * itself. Jean II */ | |
220 | ||
221 | /* Kill the LAP and all LSAPs on top of it */ | |
222 | irlmp_unregister_link(self->saddr); | |
223 | self->notify.instance = NULL; | |
224 | ||
225 | /* Be sure that we manage to remove ourself from the hash */ | |
226 | lap = hashbin_remove(irlap, self->saddr, NULL); | |
227 | if (!lap) { | |
955a9d20 | 228 | pr_debug("%s(), Didn't find myself!\n", __func__); |
1da177e4 LT |
229 | return; |
230 | } | |
231 | __irlap_close(lap); | |
232 | } | |
233 | EXPORT_SYMBOL(irlap_close); | |
234 | ||
235 | /* | |
236 | * Function irlap_connect_indication (self, skb) | |
237 | * | |
238 | * Another device is attempting to make a connection | |
239 | * | |
240 | */ | |
241 | void irlap_connect_indication(struct irlap_cb *self, struct sk_buff *skb) | |
242 | { | |
1da177e4 LT |
243 | IRDA_ASSERT(self != NULL, return;); |
244 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
245 | ||
246 | irlap_init_qos_capabilities(self, NULL); /* No user QoS! */ | |
247 | ||
248 | irlmp_link_connect_indication(self->notify.instance, self->saddr, | |
249 | self->daddr, &self->qos_tx, skb); | |
250 | } | |
251 | ||
252 | /* | |
253 | * Function irlap_connect_response (self, skb) | |
254 | * | |
255 | * Service user has accepted incoming connection | |
256 | * | |
257 | */ | |
258 | void irlap_connect_response(struct irlap_cb *self, struct sk_buff *userdata) | |
259 | { | |
1da177e4 LT |
260 | irlap_do_event(self, CONNECT_RESPONSE, userdata, NULL); |
261 | } | |
262 | ||
263 | /* | |
264 | * Function irlap_connect_request (self, daddr, qos_user, sniff) | |
265 | * | |
266 | * Request connection with another device, sniffing is not implemented | |
267 | * yet. | |
268 | * | |
269 | */ | |
270 | void irlap_connect_request(struct irlap_cb *self, __u32 daddr, | |
271 | struct qos_info *qos_user, int sniff) | |
272 | { | |
955a9d20 | 273 | pr_debug("%s(), daddr=0x%08x\n", __func__, daddr); |
1da177e4 LT |
274 | |
275 | IRDA_ASSERT(self != NULL, return;); | |
276 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
277 | ||
278 | self->daddr = daddr; | |
279 | ||
280 | /* | |
281 | * If the service user specifies QoS values for this connection, | |
282 | * then use them | |
283 | */ | |
284 | irlap_init_qos_capabilities(self, qos_user); | |
285 | ||
286 | if ((self->state == LAP_NDM) && !self->media_busy) | |
287 | irlap_do_event(self, CONNECT_REQUEST, NULL, NULL); | |
288 | else | |
289 | self->connect_pending = TRUE; | |
290 | } | |
291 | ||
292 | /* | |
293 | * Function irlap_connect_confirm (self, skb) | |
294 | * | |
295 | * Connection request has been accepted | |
296 | * | |
297 | */ | |
298 | void irlap_connect_confirm(struct irlap_cb *self, struct sk_buff *skb) | |
299 | { | |
1da177e4 LT |
300 | IRDA_ASSERT(self != NULL, return;); |
301 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
302 | ||
303 | irlmp_link_connect_confirm(self->notify.instance, &self->qos_tx, skb); | |
304 | } | |
305 | ||
306 | /* | |
307 | * Function irlap_data_indication (self, skb) | |
308 | * | |
309 | * Received data frames from IR-port, so we just pass them up to | |
310 | * IrLMP for further processing | |
311 | * | |
312 | */ | |
313 | void irlap_data_indication(struct irlap_cb *self, struct sk_buff *skb, | |
314 | int unreliable) | |
315 | { | |
316 | /* Hide LAP header from IrLMP layer */ | |
317 | skb_pull(skb, LAP_ADDR_HEADER+LAP_CTRL_HEADER); | |
318 | ||
319 | irlmp_link_data_indication(self->notify.instance, skb, unreliable); | |
320 | } | |
321 | ||
322 | ||
323 | /* | |
324 | * Function irlap_data_request (self, skb) | |
325 | * | |
326 | * Queue data for transmission, must wait until XMIT state | |
327 | * | |
328 | */ | |
329 | void irlap_data_request(struct irlap_cb *self, struct sk_buff *skb, | |
330 | int unreliable) | |
331 | { | |
332 | IRDA_ASSERT(self != NULL, return;); | |
333 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
334 | ||
1da177e4 LT |
335 | IRDA_ASSERT(skb_headroom(skb) >= (LAP_ADDR_HEADER+LAP_CTRL_HEADER), |
336 | return;); | |
337 | skb_push(skb, LAP_ADDR_HEADER+LAP_CTRL_HEADER); | |
338 | ||
339 | /* | |
340 | * Must set frame format now so that the rest of the code knows | |
341 | * if its dealing with an I or an UI frame | |
342 | */ | |
343 | if (unreliable) | |
344 | skb->data[1] = UI_FRAME; | |
345 | else | |
346 | skb->data[1] = I_FRAME; | |
347 | ||
348 | /* Don't forget to refcount it - see irlmp_connect_request(). */ | |
349 | skb_get(skb); | |
350 | ||
351 | /* Add at the end of the queue (keep ordering) - Jean II */ | |
352 | skb_queue_tail(&self->txq, skb); | |
353 | ||
354 | /* | |
355 | * Send event if this frame only if we are in the right state | |
356 | * FIXME: udata should be sent first! (skb_queue_head?) | |
357 | */ | |
358 | if ((self->state == LAP_XMIT_P) || (self->state == LAP_XMIT_S)) { | |
359 | /* If we are not already processing the Tx queue, trigger | |
360 | * transmission immediately - Jean II */ | |
361 | if((skb_queue_len(&self->txq) <= 1) && (!self->local_busy)) | |
362 | irlap_do_event(self, DATA_REQUEST, skb, NULL); | |
363 | /* Otherwise, the packets will be sent normally at the | |
364 | * next pf-poll - Jean II */ | |
365 | } | |
366 | } | |
367 | ||
368 | /* | |
369 | * Function irlap_unitdata_request (self, skb) | |
370 | * | |
371 | * Send Ultra data. This is data that must be sent outside any connection | |
372 | * | |
373 | */ | |
374 | #ifdef CONFIG_IRDA_ULTRA | |
375 | void irlap_unitdata_request(struct irlap_cb *self, struct sk_buff *skb) | |
376 | { | |
377 | IRDA_ASSERT(self != NULL, return;); | |
378 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
379 | ||
1da177e4 LT |
380 | IRDA_ASSERT(skb_headroom(skb) >= (LAP_ADDR_HEADER+LAP_CTRL_HEADER), |
381 | return;); | |
382 | skb_push(skb, LAP_ADDR_HEADER+LAP_CTRL_HEADER); | |
383 | ||
384 | skb->data[0] = CBROADCAST; | |
385 | skb->data[1] = UI_FRAME; | |
386 | ||
387 | /* Don't need to refcount, see irlmp_connless_data_request() */ | |
388 | ||
389 | skb_queue_tail(&self->txq_ultra, skb); | |
390 | ||
391 | irlap_do_event(self, SEND_UI_FRAME, NULL, NULL); | |
392 | } | |
393 | #endif /*CONFIG_IRDA_ULTRA */ | |
394 | ||
395 | /* | |
396 | * Function irlap_udata_indication (self, skb) | |
397 | * | |
398 | * Receive Ultra data. This is data that is received outside any connection | |
399 | * | |
400 | */ | |
401 | #ifdef CONFIG_IRDA_ULTRA | |
402 | void irlap_unitdata_indication(struct irlap_cb *self, struct sk_buff *skb) | |
403 | { | |
1da177e4 LT |
404 | IRDA_ASSERT(self != NULL, return;); |
405 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
406 | IRDA_ASSERT(skb != NULL, return;); | |
407 | ||
408 | /* Hide LAP header from IrLMP layer */ | |
409 | skb_pull(skb, LAP_ADDR_HEADER+LAP_CTRL_HEADER); | |
410 | ||
411 | irlmp_link_unitdata_indication(self->notify.instance, skb); | |
412 | } | |
413 | #endif /* CONFIG_IRDA_ULTRA */ | |
414 | ||
415 | /* | |
416 | * Function irlap_disconnect_request (void) | |
417 | * | |
418 | * Request to disconnect connection by service user | |
419 | */ | |
420 | void irlap_disconnect_request(struct irlap_cb *self) | |
421 | { | |
1da177e4 LT |
422 | IRDA_ASSERT(self != NULL, return;); |
423 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
424 | ||
425 | /* Don't disconnect until all data frames are successfully sent */ | |
b03efcfb | 426 | if (!skb_queue_empty(&self->txq)) { |
1da177e4 | 427 | self->disconnect_pending = TRUE; |
1da177e4 LT |
428 | return; |
429 | } | |
430 | ||
431 | /* Check if we are in the right state for disconnecting */ | |
432 | switch (self->state) { | |
af901ca1 AGR |
433 | case LAP_XMIT_P: /* FALLTHROUGH */ |
434 | case LAP_XMIT_S: /* FALLTHROUGH */ | |
435 | case LAP_CONN: /* FALLTHROUGH */ | |
436 | case LAP_RESET_WAIT: /* FALLTHROUGH */ | |
1da177e4 LT |
437 | case LAP_RESET_CHECK: |
438 | irlap_do_event(self, DISCONNECT_REQUEST, NULL, NULL); | |
439 | break; | |
440 | default: | |
955a9d20 | 441 | pr_debug("%s(), disconnect pending!\n", __func__); |
1da177e4 LT |
442 | self->disconnect_pending = TRUE; |
443 | break; | |
444 | } | |
445 | } | |
446 | ||
447 | /* | |
448 | * Function irlap_disconnect_indication (void) | |
449 | * | |
450 | * Disconnect request from other device | |
451 | * | |
452 | */ | |
453 | void irlap_disconnect_indication(struct irlap_cb *self, LAP_REASON reason) | |
454 | { | |
955a9d20 | 455 | pr_debug("%s(), reason=%s\n", __func__, lap_reasons[reason]); |
1da177e4 LT |
456 | |
457 | IRDA_ASSERT(self != NULL, return;); | |
458 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
459 | ||
460 | /* Flush queues */ | |
461 | irlap_flush_all_queues(self); | |
462 | ||
463 | switch (reason) { | |
464 | case LAP_RESET_INDICATION: | |
955a9d20 | 465 | pr_debug("%s(), Sending reset request!\n", __func__); |
1da177e4 LT |
466 | irlap_do_event(self, RESET_REQUEST, NULL, NULL); |
467 | break; | |
af901ca1 AGR |
468 | case LAP_NO_RESPONSE: /* FALLTHROUGH */ |
469 | case LAP_DISC_INDICATION: /* FALLTHROUGH */ | |
470 | case LAP_FOUND_NONE: /* FALLTHROUGH */ | |
1da177e4 LT |
471 | case LAP_MEDIA_BUSY: |
472 | irlmp_link_disconnect_indication(self->notify.instance, self, | |
473 | reason, NULL); | |
474 | break; | |
475 | default: | |
6c91023d JP |
476 | net_err_ratelimited("%s: Unknown reason %d\n", |
477 | __func__, reason); | |
1da177e4 LT |
478 | } |
479 | } | |
480 | ||
481 | /* | |
482 | * Function irlap_discovery_request (gen_addr_bit) | |
483 | * | |
484 | * Start one single discovery operation. | |
485 | * | |
486 | */ | |
487 | void irlap_discovery_request(struct irlap_cb *self, discovery_t *discovery) | |
488 | { | |
489 | struct irlap_info info; | |
490 | ||
491 | IRDA_ASSERT(self != NULL, return;); | |
492 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
493 | IRDA_ASSERT(discovery != NULL, return;); | |
494 | ||
955a9d20 | 495 | pr_debug("%s(), nslots = %d\n", __func__, discovery->nslots); |
1da177e4 LT |
496 | |
497 | IRDA_ASSERT((discovery->nslots == 1) || (discovery->nslots == 6) || | |
498 | (discovery->nslots == 8) || (discovery->nslots == 16), | |
499 | return;); | |
500 | ||
501 | /* Discovery is only possible in NDM mode */ | |
502 | if (self->state != LAP_NDM) { | |
955a9d20 JP |
503 | pr_debug("%s(), discovery only possible in NDM mode\n", |
504 | __func__); | |
1da177e4 LT |
505 | irlap_discovery_confirm(self, NULL); |
506 | /* Note : in theory, if we are not in NDM, we could postpone | |
507 | * the discovery like we do for connection request. | |
508 | * In practice, it's not worth it. If the media was busy, | |
509 | * it's likely next time around it won't be busy. If we are | |
510 | * in REPLY state, we will get passive discovery info & event. | |
511 | * Jean II */ | |
512 | return; | |
513 | } | |
514 | ||
515 | /* Check if last discovery request finished in time, or if | |
516 | * it was aborted due to the media busy flag. */ | |
517 | if (self->discovery_log != NULL) { | |
518 | hashbin_delete(self->discovery_log, (FREE_FUNC) kfree); | |
519 | self->discovery_log = NULL; | |
520 | } | |
521 | ||
522 | /* All operations will occur at predictable time, no need to lock */ | |
523 | self->discovery_log = hashbin_new(HB_NOLOCK); | |
524 | ||
525 | if (self->discovery_log == NULL) { | |
6c91023d JP |
526 | net_warn_ratelimited("%s(), Unable to allocate discovery log!\n", |
527 | __func__); | |
1da177e4 LT |
528 | return; |
529 | } | |
530 | ||
531 | info.S = discovery->nslots; /* Number of slots */ | |
532 | info.s = 0; /* Current slot */ | |
533 | ||
534 | self->discovery_cmd = discovery; | |
535 | info.discovery = discovery; | |
536 | ||
537 | /* sysctl_slot_timeout bounds are checked in irsysctl.c - Jean II */ | |
538 | self->slot_timeout = sysctl_slot_timeout * HZ / 1000; | |
539 | ||
540 | irlap_do_event(self, DISCOVERY_REQUEST, NULL, &info); | |
541 | } | |
542 | ||
543 | /* | |
544 | * Function irlap_discovery_confirm (log) | |
545 | * | |
546 | * A device has been discovered in front of this station, we | |
547 | * report directly to LMP. | |
548 | */ | |
549 | void irlap_discovery_confirm(struct irlap_cb *self, hashbin_t *discovery_log) | |
550 | { | |
551 | IRDA_ASSERT(self != NULL, return;); | |
552 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
553 | ||
554 | IRDA_ASSERT(self->notify.instance != NULL, return;); | |
555 | ||
556 | /* | |
557 | * Check for successful discovery, since we are then allowed to clear | |
558 | * the media busy condition (IrLAP 6.13.4 - p.94). This should allow | |
559 | * us to make connection attempts much faster and easier (i.e. no | |
560 | * collisions). | |
561 | * Setting media busy to false will also generate an event allowing | |
562 | * to process pending events in NDM state machine. | |
563 | * Note : the spec doesn't define what's a successful discovery is. | |
564 | * If we want Ultra to work, it's successful even if there is | |
565 | * nobody discovered - Jean II | |
566 | */ | |
567 | if (discovery_log) | |
568 | irda_device_set_media_busy(self->netdev, FALSE); | |
569 | ||
570 | /* Inform IrLMP */ | |
571 | irlmp_link_discovery_confirm(self->notify.instance, discovery_log); | |
572 | } | |
573 | ||
574 | /* | |
575 | * Function irlap_discovery_indication (log) | |
576 | * | |
577 | * Somebody is trying to discover us! | |
578 | * | |
579 | */ | |
580 | void irlap_discovery_indication(struct irlap_cb *self, discovery_t *discovery) | |
581 | { | |
1da177e4 LT |
582 | IRDA_ASSERT(self != NULL, return;); |
583 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
584 | IRDA_ASSERT(discovery != NULL, return;); | |
585 | ||
586 | IRDA_ASSERT(self->notify.instance != NULL, return;); | |
587 | ||
588 | /* A device is very likely to connect immediately after it performs | |
589 | * a successful discovery. This means that in our case, we are much | |
590 | * more likely to receive a connection request over the medium. | |
591 | * So, we backoff to avoid collisions. | |
592 | * IrLAP spec 6.13.4 suggest 100ms... | |
593 | * Note : this little trick actually make a *BIG* difference. If I set | |
594 | * my Linux box with discovery enabled and one Ultra frame sent every | |
595 | * second, my Palm has no trouble connecting to it every time ! | |
596 | * Jean II */ | |
597 | irda_device_set_media_busy(self->netdev, SMALL); | |
598 | ||
599 | irlmp_link_discovery_indication(self->notify.instance, discovery); | |
600 | } | |
601 | ||
602 | /* | |
603 | * Function irlap_status_indication (quality_of_link) | |
604 | */ | |
605 | void irlap_status_indication(struct irlap_cb *self, int quality_of_link) | |
606 | { | |
607 | switch (quality_of_link) { | |
608 | case STATUS_NO_ACTIVITY: | |
6c91023d | 609 | net_info_ratelimited("IrLAP, no activity on link!\n"); |
1da177e4 LT |
610 | break; |
611 | case STATUS_NOISY: | |
6c91023d | 612 | net_info_ratelimited("IrLAP, noisy link!\n"); |
1da177e4 LT |
613 | break; |
614 | default: | |
615 | break; | |
616 | } | |
617 | irlmp_status_indication(self->notify.instance, | |
618 | quality_of_link, LOCK_NO_CHANGE); | |
619 | } | |
620 | ||
621 | /* | |
622 | * Function irlap_reset_indication (void) | |
623 | */ | |
624 | void irlap_reset_indication(struct irlap_cb *self) | |
625 | { | |
1da177e4 LT |
626 | IRDA_ASSERT(self != NULL, return;); |
627 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
628 | ||
629 | if (self->state == LAP_RESET_WAIT) | |
630 | irlap_do_event(self, RESET_REQUEST, NULL, NULL); | |
631 | else | |
632 | irlap_do_event(self, RESET_RESPONSE, NULL, NULL); | |
633 | } | |
634 | ||
635 | /* | |
636 | * Function irlap_reset_confirm (void) | |
637 | */ | |
638 | void irlap_reset_confirm(void) | |
639 | { | |
1da177e4 LT |
640 | } |
641 | ||
642 | /* | |
643 | * Function irlap_generate_rand_time_slot (S, s) | |
644 | * | |
645 | * Generate a random time slot between s and S-1 where | |
646 | * S = Number of slots (0 -> S-1) | |
647 | * s = Current slot | |
648 | */ | |
649 | int irlap_generate_rand_time_slot(int S, int s) | |
650 | { | |
651 | static int rand; | |
652 | int slot; | |
653 | ||
654 | IRDA_ASSERT((S - s) > 0, return 0;); | |
655 | ||
656 | rand += jiffies; | |
657 | rand ^= (rand << 12); | |
658 | rand ^= (rand >> 20); | |
659 | ||
660 | slot = s + rand % (S-s); | |
661 | ||
662 | IRDA_ASSERT((slot >= s) || (slot < S), return 0;); | |
663 | ||
664 | return slot; | |
665 | } | |
666 | ||
667 | /* | |
668 | * Function irlap_update_nr_received (nr) | |
669 | * | |
670 | * Remove all acknowledged frames in current window queue. This code is | |
671 | * not intuitive and you should not try to change it. If you think it | |
672 | * contains bugs, please mail a patch to the author instead. | |
673 | */ | |
674 | void irlap_update_nr_received(struct irlap_cb *self, int nr) | |
675 | { | |
676 | struct sk_buff *skb = NULL; | |
677 | int count = 0; | |
678 | ||
679 | /* | |
6819bc2e YH |
680 | * Remove all the ack-ed frames from the window queue. |
681 | */ | |
1da177e4 LT |
682 | |
683 | /* | |
684 | * Optimize for the common case. It is most likely that the receiver | |
685 | * will acknowledge all the frames we have sent! So in that case we | |
686 | * delete all frames stored in window. | |
687 | */ | |
688 | if (nr == self->vs) { | |
689 | while ((skb = skb_dequeue(&self->wx_list)) != NULL) { | |
690 | dev_kfree_skb(skb); | |
691 | } | |
692 | /* The last acked frame is the next to send minus one */ | |
693 | self->va = nr - 1; | |
694 | } else { | |
695 | /* Remove all acknowledged frames in current window */ | |
696 | while ((skb_peek(&self->wx_list) != NULL) && | |
697 | (((self->va+1) % 8) != nr)) | |
698 | { | |
699 | skb = skb_dequeue(&self->wx_list); | |
700 | dev_kfree_skb(skb); | |
701 | ||
702 | self->va = (self->va + 1) % 8; | |
703 | count++; | |
704 | } | |
705 | } | |
706 | ||
707 | /* Advance window */ | |
708 | self->window = self->window_size - skb_queue_len(&self->wx_list); | |
709 | } | |
710 | ||
711 | /* | |
712 | * Function irlap_validate_ns_received (ns) | |
713 | * | |
714 | * Validate the next to send (ns) field from received frame. | |
715 | */ | |
716 | int irlap_validate_ns_received(struct irlap_cb *self, int ns) | |
717 | { | |
718 | /* ns as expected? */ | |
719 | if (ns == self->vr) | |
720 | return NS_EXPECTED; | |
721 | /* | |
722 | * Stations are allowed to treat invalid NS as unexpected NS | |
723 | * IrLAP, Recv ... with-invalid-Ns. p. 84 | |
724 | */ | |
725 | return NS_UNEXPECTED; | |
726 | ||
727 | /* return NR_INVALID; */ | |
728 | } | |
729 | /* | |
730 | * Function irlap_validate_nr_received (nr) | |
731 | * | |
732 | * Validate the next to receive (nr) field from received frame. | |
733 | * | |
734 | */ | |
735 | int irlap_validate_nr_received(struct irlap_cb *self, int nr) | |
736 | { | |
737 | /* nr as expected? */ | |
738 | if (nr == self->vs) { | |
955a9d20 | 739 | pr_debug("%s(), expected!\n", __func__); |
1da177e4 LT |
740 | return NR_EXPECTED; |
741 | } | |
742 | ||
743 | /* | |
744 | * unexpected nr? (but within current window), first we check if the | |
745 | * ns numbers of the frames in the current window wrap. | |
746 | */ | |
747 | if (self->va < self->vs) { | |
748 | if ((nr >= self->va) && (nr <= self->vs)) | |
749 | return NR_UNEXPECTED; | |
750 | } else { | |
751 | if ((nr >= self->va) || (nr <= self->vs)) | |
752 | return NR_UNEXPECTED; | |
753 | } | |
754 | ||
755 | /* Invalid nr! */ | |
756 | return NR_INVALID; | |
757 | } | |
758 | ||
759 | /* | |
760 | * Function irlap_initiate_connection_state () | |
761 | * | |
762 | * Initialize the connection state parameters | |
763 | * | |
764 | */ | |
765 | void irlap_initiate_connection_state(struct irlap_cb *self) | |
766 | { | |
1da177e4 LT |
767 | IRDA_ASSERT(self != NULL, return;); |
768 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
769 | ||
770 | /* Next to send and next to receive */ | |
771 | self->vs = self->vr = 0; | |
772 | ||
773 | /* Last frame which got acked (0 - 1) % 8 */ | |
774 | self->va = 7; | |
775 | ||
776 | self->window = 1; | |
777 | ||
778 | self->remote_busy = FALSE; | |
779 | self->retry_count = 0; | |
780 | } | |
781 | ||
782 | /* | |
783 | * Function irlap_wait_min_turn_around (self, qos) | |
784 | * | |
785 | * Wait negotiated minimum turn around time, this function actually sets | |
786 | * the number of BOS's that must be sent before the next transmitted | |
787 | * frame in order to delay for the specified amount of time. This is | |
788 | * done to avoid using timers, and the forbidden udelay! | |
789 | */ | |
790 | void irlap_wait_min_turn_around(struct irlap_cb *self, struct qos_info *qos) | |
791 | { | |
792 | __u32 min_turn_time; | |
793 | __u32 speed; | |
794 | ||
795 | /* Get QoS values. */ | |
796 | speed = qos->baud_rate.value; | |
797 | min_turn_time = qos->min_turn_time.value; | |
798 | ||
799 | /* No need to calculate XBOFs for speeds over 115200 bps */ | |
800 | if (speed > 115200) { | |
801 | self->mtt_required = min_turn_time; | |
802 | return; | |
803 | } | |
804 | ||
805 | /* | |
806 | * Send additional BOF's for the next frame for the requested | |
807 | * min turn time, so now we must calculate how many chars (XBOF's) we | |
808 | * must send for the requested time period (min turn time) | |
809 | */ | |
810 | self->xbofs_delay = irlap_min_turn_time_in_bytes(speed, min_turn_time); | |
811 | } | |
812 | ||
813 | /* | |
814 | * Function irlap_flush_all_queues (void) | |
815 | * | |
816 | * Flush all queues | |
817 | * | |
818 | */ | |
819 | void irlap_flush_all_queues(struct irlap_cb *self) | |
820 | { | |
821 | struct sk_buff* skb; | |
822 | ||
823 | IRDA_ASSERT(self != NULL, return;); | |
824 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
825 | ||
826 | /* Free transmission queue */ | |
827 | while ((skb = skb_dequeue(&self->txq)) != NULL) | |
828 | dev_kfree_skb(skb); | |
829 | ||
830 | while ((skb = skb_dequeue(&self->txq_ultra)) != NULL) | |
831 | dev_kfree_skb(skb); | |
832 | ||
833 | /* Free sliding window buffered packets */ | |
834 | while ((skb = skb_dequeue(&self->wx_list)) != NULL) | |
835 | dev_kfree_skb(skb); | |
836 | } | |
837 | ||
838 | /* | |
839 | * Function irlap_setspeed (self, speed) | |
840 | * | |
841 | * Change the speed of the IrDA port | |
842 | * | |
843 | */ | |
844 | static void irlap_change_speed(struct irlap_cb *self, __u32 speed, int now) | |
845 | { | |
846 | struct sk_buff *skb; | |
847 | ||
955a9d20 | 848 | pr_debug("%s(), setting speed to %d\n", __func__, speed); |
1da177e4 LT |
849 | |
850 | IRDA_ASSERT(self != NULL, return;); | |
851 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
852 | ||
853 | self->speed = speed; | |
854 | ||
855 | /* Change speed now, or just piggyback speed on frames */ | |
856 | if (now) { | |
857 | /* Send down empty frame to trigger speed change */ | |
485fb2c9 | 858 | skb = alloc_skb(0, GFP_ATOMIC); |
8c893ff6 FM |
859 | if (skb) |
860 | irlap_queue_xmit(self, skb); | |
1da177e4 LT |
861 | } |
862 | } | |
863 | ||
864 | /* | |
865 | * Function irlap_init_qos_capabilities (self, qos) | |
866 | * | |
867 | * Initialize QoS for this IrLAP session, What we do is to compute the | |
868 | * intersection of the QoS capabilities for the user, driver and for | |
869 | * IrLAP itself. Normally, IrLAP will not specify any values, but it can | |
870 | * be used to restrict certain values. | |
871 | */ | |
872 | static void irlap_init_qos_capabilities(struct irlap_cb *self, | |
873 | struct qos_info *qos_user) | |
874 | { | |
875 | IRDA_ASSERT(self != NULL, return;); | |
876 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
877 | IRDA_ASSERT(self->netdev != NULL, return;); | |
878 | ||
879 | /* Start out with the maximum QoS support possible */ | |
880 | irda_init_max_qos_capabilies(&self->qos_rx); | |
881 | ||
882 | /* Apply drivers QoS capabilities */ | |
883 | irda_qos_compute_intersection(&self->qos_rx, self->qos_dev); | |
884 | ||
885 | /* | |
886 | * Check for user supplied QoS parameters. The service user is only | |
887 | * allowed to supply these values. We check each parameter since the | |
888 | * user may not have set all of them. | |
889 | */ | |
890 | if (qos_user) { | |
955a9d20 | 891 | pr_debug("%s(), Found user specified QoS!\n", __func__); |
1da177e4 LT |
892 | |
893 | if (qos_user->baud_rate.bits) | |
894 | self->qos_rx.baud_rate.bits &= qos_user->baud_rate.bits; | |
895 | ||
896 | if (qos_user->max_turn_time.bits) | |
897 | self->qos_rx.max_turn_time.bits &= qos_user->max_turn_time.bits; | |
898 | if (qos_user->data_size.bits) | |
899 | self->qos_rx.data_size.bits &= qos_user->data_size.bits; | |
900 | ||
901 | if (qos_user->link_disc_time.bits) | |
902 | self->qos_rx.link_disc_time.bits &= qos_user->link_disc_time.bits; | |
903 | } | |
904 | ||
905 | /* Use 500ms in IrLAP for now */ | |
906 | self->qos_rx.max_turn_time.bits &= 0x01; | |
907 | ||
908 | /* Set data size */ | |
909 | /*self->qos_rx.data_size.bits &= 0x03;*/ | |
910 | ||
911 | irda_qos_bits_to_value(&self->qos_rx); | |
912 | } | |
913 | ||
914 | /* | |
915 | * Function irlap_apply_default_connection_parameters (void, now) | |
916 | * | |
917 | * Use the default connection and transmission parameters | |
918 | */ | |
919 | void irlap_apply_default_connection_parameters(struct irlap_cb *self) | |
920 | { | |
1da177e4 LT |
921 | IRDA_ASSERT(self != NULL, return;); |
922 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
923 | ||
924 | /* xbofs : Default value in NDM */ | |
925 | self->next_bofs = 12; | |
926 | self->bofs_count = 12; | |
927 | ||
928 | /* NDM Speed is 9600 */ | |
929 | irlap_change_speed(self, 9600, TRUE); | |
930 | ||
931 | /* Set mbusy when going to NDM state */ | |
932 | irda_device_set_media_busy(self->netdev, TRUE); | |
933 | ||
934 | /* | |
935 | * Generate random connection address for this session, which must | |
936 | * be 7 bits wide and different from 0x00 and 0xfe | |
937 | */ | |
938 | while ((self->caddr == 0x00) || (self->caddr == 0xfe)) { | |
939 | get_random_bytes(&self->caddr, sizeof(self->caddr)); | |
940 | self->caddr &= 0xfe; | |
941 | } | |
942 | ||
943 | /* Use default values until connection has been negitiated */ | |
944 | self->slot_timeout = sysctl_slot_timeout; | |
945 | self->final_timeout = FINAL_TIMEOUT; | |
946 | self->poll_timeout = POLL_TIMEOUT; | |
947 | self->wd_timeout = WD_TIMEOUT; | |
948 | ||
949 | /* Set some default values */ | |
950 | self->qos_tx.baud_rate.value = 9600; | |
951 | self->qos_rx.baud_rate.value = 9600; | |
952 | self->qos_tx.max_turn_time.value = 0; | |
953 | self->qos_rx.max_turn_time.value = 0; | |
954 | self->qos_tx.min_turn_time.value = 0; | |
955 | self->qos_rx.min_turn_time.value = 0; | |
956 | self->qos_tx.data_size.value = 64; | |
957 | self->qos_rx.data_size.value = 64; | |
958 | self->qos_tx.window_size.value = 1; | |
959 | self->qos_rx.window_size.value = 1; | |
960 | self->qos_tx.additional_bofs.value = 12; | |
961 | self->qos_rx.additional_bofs.value = 12; | |
962 | self->qos_tx.link_disc_time.value = 0; | |
963 | self->qos_rx.link_disc_time.value = 0; | |
964 | ||
965 | irlap_flush_all_queues(self); | |
966 | ||
967 | self->disconnect_pending = FALSE; | |
968 | self->connect_pending = FALSE; | |
969 | } | |
970 | ||
971 | /* | |
972 | * Function irlap_apply_connection_parameters (qos, now) | |
973 | * | |
974 | * Initialize IrLAP with the negotiated QoS values | |
975 | * | |
976 | * If 'now' is false, the speed and xbofs will be changed after the next | |
977 | * frame is sent. | |
978 | * If 'now' is true, the speed and xbofs is changed immediately | |
979 | */ | |
980 | void irlap_apply_connection_parameters(struct irlap_cb *self, int now) | |
981 | { | |
1da177e4 LT |
982 | IRDA_ASSERT(self != NULL, return;); |
983 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
984 | ||
985 | /* Set the negotiated xbofs value */ | |
986 | self->next_bofs = self->qos_tx.additional_bofs.value; | |
987 | if (now) | |
988 | self->bofs_count = self->next_bofs; | |
989 | ||
990 | /* Set the negotiated link speed (may need the new xbofs value) */ | |
991 | irlap_change_speed(self, self->qos_tx.baud_rate.value, now); | |
992 | ||
993 | self->window_size = self->qos_tx.window_size.value; | |
994 | self->window = self->qos_tx.window_size.value; | |
995 | ||
996 | #ifdef CONFIG_IRDA_DYNAMIC_WINDOW | |
997 | /* | |
998 | * Calculate how many bytes it is possible to transmit before the | |
999 | * link must be turned around | |
1000 | */ | |
1001 | self->line_capacity = | |
1002 | irlap_max_line_capacity(self->qos_tx.baud_rate.value, | |
1003 | self->qos_tx.max_turn_time.value); | |
1004 | self->bytes_left = self->line_capacity; | |
1005 | #endif /* CONFIG_IRDA_DYNAMIC_WINDOW */ | |
1006 | ||
1007 | ||
1008 | /* | |
1009 | * Initialize timeout values, some of the rules are listed on | |
1010 | * page 92 in IrLAP. | |
1011 | */ | |
1012 | IRDA_ASSERT(self->qos_tx.max_turn_time.value != 0, return;); | |
1013 | IRDA_ASSERT(self->qos_rx.max_turn_time.value != 0, return;); | |
1014 | /* The poll timeout applies only to the primary station. | |
1015 | * It defines the maximum time the primary stay in XMIT mode | |
1016 | * before timeout and turning the link around (sending a RR). | |
1017 | * Or, this is how much we can keep the pf bit in primary mode. | |
1018 | * Therefore, it must be lower or equal than our *OWN* max turn around. | |
1019 | * Jean II */ | |
1020 | self->poll_timeout = self->qos_tx.max_turn_time.value * HZ / 1000; | |
1021 | /* The Final timeout applies only to the primary station. | |
1022 | * It defines the maximum time the primary wait (mostly in RECV mode) | |
1023 | * for an answer from the secondary station before polling it again. | |
1024 | * Therefore, it must be greater or equal than our *PARTNER* | |
1025 | * max turn around time - Jean II */ | |
1026 | self->final_timeout = self->qos_rx.max_turn_time.value * HZ / 1000; | |
1027 | /* The Watchdog Bit timeout applies only to the secondary station. | |
1028 | * It defines the maximum time the secondary wait (mostly in RECV mode) | |
1029 | * for poll from the primary station before getting annoyed. | |
1030 | * Therefore, it must be greater or equal than our *PARTNER* | |
1031 | * max turn around time - Jean II */ | |
1032 | self->wd_timeout = self->final_timeout * 2; | |
1033 | ||
1034 | /* | |
1035 | * N1 and N2 are maximum retry count for *both* the final timer | |
1036 | * and the wd timer (with a factor 2) as defined above. | |
1037 | * After N1 retry of a timer, we give a warning to the user. | |
1038 | * After N2 retry, we consider the link dead and disconnect it. | |
1039 | * Jean II | |
1040 | */ | |
1041 | ||
1042 | /* | |
1043 | * Set N1 to 0 if Link Disconnect/Threshold Time = 3 and set it to | |
1044 | * 3 seconds otherwise. See page 71 in IrLAP for more details. | |
1045 | * Actually, it's not always 3 seconds, as we allow to set | |
1046 | * it via sysctl... Max maxtt is 500ms, and N1 need to be multiple | |
1047 | * of 2, so 1 second is minimum we can allow. - Jean II | |
1048 | */ | |
1049 | if (self->qos_tx.link_disc_time.value == sysctl_warn_noreply_time) | |
1050 | /* | |
1051 | * If we set N1 to 0, it will trigger immediately, which is | |
1052 | * not what we want. What we really want is to disable it, | |
1053 | * Jean II | |
1054 | */ | |
1055 | self->N1 = -2; /* Disable - Need to be multiple of 2*/ | |
1056 | else | |
1057 | self->N1 = sysctl_warn_noreply_time * 1000 / | |
1058 | self->qos_rx.max_turn_time.value; | |
1059 | ||
955a9d20 | 1060 | pr_debug("Setting N1 = %d\n", self->N1); |
1da177e4 LT |
1061 | |
1062 | /* Set N2 to match our own disconnect time */ | |
1063 | self->N2 = self->qos_tx.link_disc_time.value * 1000 / | |
1064 | self->qos_rx.max_turn_time.value; | |
955a9d20 | 1065 | pr_debug("Setting N2 = %d\n", self->N2); |
1da177e4 LT |
1066 | } |
1067 | ||
1068 | #ifdef CONFIG_PROC_FS | |
1069 | struct irlap_iter_state { | |
1070 | int id; | |
1071 | }; | |
1072 | ||
1073 | static void *irlap_seq_start(struct seq_file *seq, loff_t *pos) | |
1074 | { | |
1075 | struct irlap_iter_state *iter = seq->private; | |
1076 | struct irlap_cb *self; | |
1077 | ||
1078 | /* Protect our access to the tsap list */ | |
1079 | spin_lock_irq(&irlap->hb_spinlock); | |
1080 | iter->id = 0; | |
1081 | ||
6819bc2e | 1082 | for (self = (struct irlap_cb *) hashbin_get_first(irlap); |
1da177e4 LT |
1083 | self; self = (struct irlap_cb *) hashbin_get_next(irlap)) { |
1084 | if (iter->id == *pos) | |
1085 | break; | |
1086 | ++iter->id; | |
1087 | } | |
6819bc2e | 1088 | |
1da177e4 LT |
1089 | return self; |
1090 | } | |
1091 | ||
1092 | static void *irlap_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1093 | { | |
1094 | struct irlap_iter_state *iter = seq->private; | |
1095 | ||
1096 | ++*pos; | |
1097 | ++iter->id; | |
1098 | return (void *) hashbin_get_next(irlap); | |
1099 | } | |
1100 | ||
1101 | static void irlap_seq_stop(struct seq_file *seq, void *v) | |
1102 | { | |
1103 | spin_unlock_irq(&irlap->hb_spinlock); | |
1104 | } | |
1105 | ||
1106 | static int irlap_seq_show(struct seq_file *seq, void *v) | |
1107 | { | |
1108 | const struct irlap_iter_state *iter = seq->private; | |
1109 | const struct irlap_cb *self = v; | |
6819bc2e | 1110 | |
1da177e4 LT |
1111 | IRDA_ASSERT(self->magic == LAP_MAGIC, return -EINVAL;); |
1112 | ||
1113 | seq_printf(seq, "irlap%d ", iter->id); | |
1114 | seq_printf(seq, "state: %s\n", | |
1115 | irlap_state[self->state]); | |
1116 | ||
1117 | seq_printf(seq, " device name: %s, ", | |
1118 | (self->netdev) ? self->netdev->name : "bug"); | |
1119 | seq_printf(seq, "hardware name: %s\n", self->hw_name); | |
1120 | ||
1121 | seq_printf(seq, " caddr: %#02x, ", self->caddr); | |
1122 | seq_printf(seq, "saddr: %#08x, ", self->saddr); | |
1123 | seq_printf(seq, "daddr: %#08x\n", self->daddr); | |
1124 | ||
1125 | seq_printf(seq, " win size: %d, ", | |
1126 | self->window_size); | |
1127 | seq_printf(seq, "win: %d, ", self->window); | |
1128 | #ifdef CONFIG_IRDA_DYNAMIC_WINDOW | |
1129 | seq_printf(seq, "line capacity: %d, ", | |
1130 | self->line_capacity); | |
1131 | seq_printf(seq, "bytes left: %d\n", self->bytes_left); | |
1132 | #endif /* CONFIG_IRDA_DYNAMIC_WINDOW */ | |
1133 | seq_printf(seq, " tx queue len: %d ", | |
1134 | skb_queue_len(&self->txq)); | |
1135 | seq_printf(seq, "win queue len: %d ", | |
1136 | skb_queue_len(&self->wx_list)); | |
1137 | seq_printf(seq, "rbusy: %s", self->remote_busy ? | |
1138 | "TRUE" : "FALSE"); | |
1139 | seq_printf(seq, " mbusy: %s\n", self->media_busy ? | |
1140 | "TRUE" : "FALSE"); | |
1141 | ||
1142 | seq_printf(seq, " retrans: %d ", self->retry_count); | |
1143 | seq_printf(seq, "vs: %d ", self->vs); | |
1144 | seq_printf(seq, "vr: %d ", self->vr); | |
1145 | seq_printf(seq, "va: %d\n", self->va); | |
1146 | ||
1147 | seq_printf(seq, " qos\tbps\tmaxtt\tdsize\twinsize\taddbofs\tmintt\tldisc\tcomp\n"); | |
1148 | ||
1149 | seq_printf(seq, " tx\t%d\t", | |
1150 | self->qos_tx.baud_rate.value); | |
1151 | seq_printf(seq, "%d\t", | |
1152 | self->qos_tx.max_turn_time.value); | |
1153 | seq_printf(seq, "%d\t", | |
1154 | self->qos_tx.data_size.value); | |
1155 | seq_printf(seq, "%d\t", | |
1156 | self->qos_tx.window_size.value); | |
1157 | seq_printf(seq, "%d\t", | |
1158 | self->qos_tx.additional_bofs.value); | |
1159 | seq_printf(seq, "%d\t", | |
1160 | self->qos_tx.min_turn_time.value); | |
1161 | seq_printf(seq, "%d\t", | |
1162 | self->qos_tx.link_disc_time.value); | |
1163 | seq_printf(seq, "\n"); | |
1164 | ||
1165 | seq_printf(seq, " rx\t%d\t", | |
1166 | self->qos_rx.baud_rate.value); | |
1167 | seq_printf(seq, "%d\t", | |
1168 | self->qos_rx.max_turn_time.value); | |
1169 | seq_printf(seq, "%d\t", | |
1170 | self->qos_rx.data_size.value); | |
1171 | seq_printf(seq, "%d\t", | |
1172 | self->qos_rx.window_size.value); | |
1173 | seq_printf(seq, "%d\t", | |
1174 | self->qos_rx.additional_bofs.value); | |
1175 | seq_printf(seq, "%d\t", | |
1176 | self->qos_rx.min_turn_time.value); | |
1177 | seq_printf(seq, "%d\n", | |
1178 | self->qos_rx.link_disc_time.value); | |
1179 | ||
1180 | return 0; | |
1181 | } | |
1182 | ||
56b3d975 | 1183 | static const struct seq_operations irlap_seq_ops = { |
1da177e4 LT |
1184 | .start = irlap_seq_start, |
1185 | .next = irlap_seq_next, | |
1186 | .stop = irlap_seq_stop, | |
1187 | .show = irlap_seq_show, | |
1188 | }; | |
1189 | ||
1190 | static int irlap_seq_open(struct inode *inode, struct file *file) | |
1191 | { | |
a662d4cb PE |
1192 | if (irlap == NULL) |
1193 | return -EINVAL; | |
6819bc2e | 1194 | |
a662d4cb PE |
1195 | return seq_open_private(file, &irlap_seq_ops, |
1196 | sizeof(struct irlap_iter_state)); | |
1da177e4 LT |
1197 | } |
1198 | ||
da7071d7 | 1199 | const struct file_operations irlap_seq_fops = { |
1da177e4 LT |
1200 | .owner = THIS_MODULE, |
1201 | .open = irlap_seq_open, | |
1202 | .read = seq_read, | |
1203 | .llseek = seq_lseek, | |
1204 | .release = seq_release_private, | |
1205 | }; | |
1206 | ||
1207 | #endif /* CONFIG_PROC_FS */ |