]>
Commit | Line | Data |
---|---|---|
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) { | |
6819bc2e | 88 | IRDA_ERROR("%s: can't allocate irlap hashbin!\n", |
0dc47877 | 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 | ||
0dc47877 | 114 | IRDA_DEBUG(4, "%s()\n", __func__); |
1da177e4 LT |
115 | |
116 | /* Initialize the irlap structure. */ | |
0da974f4 | 117 | self = kzalloc(sizeof(struct irlap_cb), GFP_KERNEL); |
1da177e4 LT |
118 | if (self == NULL) |
119 | return NULL; | |
120 | ||
1da177e4 LT |
121 | self->magic = LAP_MAGIC; |
122 | ||
123 | /* Make a binding between the layers */ | |
124 | self->netdev = dev; | |
125 | self->qos_dev = qos; | |
126 | /* Copy hardware name */ | |
127 | if(hw_name != NULL) { | |
128 | strlcpy(self->hw_name, hw_name, sizeof(self->hw_name)); | |
129 | } else { | |
130 | self->hw_name[0] = '\0'; | |
131 | } | |
132 | ||
133 | /* FIXME: should we get our own field? */ | |
134 | dev->atalk_ptr = self; | |
135 | ||
136 | self->state = LAP_OFFLINE; | |
137 | ||
138 | /* Initialize transmit queue */ | |
139 | skb_queue_head_init(&self->txq); | |
140 | skb_queue_head_init(&self->txq_ultra); | |
141 | skb_queue_head_init(&self->wx_list); | |
142 | ||
143 | /* My unique IrLAP device address! */ | |
144 | /* We don't want the broadcast address, neither the NULL address | |
145 | * (most often used to signify "invalid"), and we don't want an | |
146 | * address already in use (otherwise connect won't be able | |
147 | * to select the proper link). - Jean II */ | |
148 | do { | |
149 | get_random_bytes(&self->saddr, sizeof(self->saddr)); | |
150 | } while ((self->saddr == 0x0) || (self->saddr == BROADCAST) || | |
151 | (hashbin_lock_find(irlap, self->saddr, NULL)) ); | |
152 | /* Copy to the driver */ | |
153 | memcpy(dev->dev_addr, &self->saddr, 4); | |
154 | ||
155 | init_timer(&self->slot_timer); | |
156 | init_timer(&self->query_timer); | |
157 | init_timer(&self->discovery_timer); | |
158 | init_timer(&self->final_timer); | |
159 | init_timer(&self->poll_timer); | |
160 | init_timer(&self->wd_timer); | |
161 | init_timer(&self->backoff_timer); | |
162 | init_timer(&self->media_busy_timer); | |
163 | ||
164 | irlap_apply_default_connection_parameters(self); | |
165 | ||
25985edc | 166 | self->N3 = 3; /* # connections attempts to try before giving up */ |
1da177e4 LT |
167 | |
168 | self->state = LAP_NDM; | |
169 | ||
170 | hashbin_insert(irlap, (irda_queue_t *) self, self->saddr, NULL); | |
171 | ||
172 | irlmp_register_link(self, self->saddr, &self->notify); | |
173 | ||
174 | return self; | |
175 | } | |
176 | EXPORT_SYMBOL(irlap_open); | |
177 | ||
178 | /* | |
179 | * Function __irlap_close (self) | |
180 | * | |
181 | * Remove IrLAP and all allocated memory. Stop any pending timers. | |
182 | * | |
183 | */ | |
184 | static void __irlap_close(struct irlap_cb *self) | |
185 | { | |
186 | IRDA_ASSERT(self != NULL, return;); | |
187 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
188 | ||
189 | /* Stop timers */ | |
190 | del_timer(&self->slot_timer); | |
191 | del_timer(&self->query_timer); | |
192 | del_timer(&self->discovery_timer); | |
193 | del_timer(&self->final_timer); | |
194 | del_timer(&self->poll_timer); | |
195 | del_timer(&self->wd_timer); | |
196 | del_timer(&self->backoff_timer); | |
197 | del_timer(&self->media_busy_timer); | |
198 | ||
199 | irlap_flush_all_queues(self); | |
200 | ||
201 | self->magic = 0; | |
202 | ||
203 | kfree(self); | |
204 | } | |
205 | ||
206 | /* | |
207 | * Function irlap_close (self) | |
208 | * | |
209 | * Remove IrLAP instance | |
210 | * | |
211 | */ | |
212 | void irlap_close(struct irlap_cb *self) | |
213 | { | |
214 | struct irlap_cb *lap; | |
215 | ||
0dc47877 | 216 | IRDA_DEBUG(4, "%s()\n", __func__); |
1da177e4 LT |
217 | |
218 | IRDA_ASSERT(self != NULL, return;); | |
219 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
220 | ||
221 | /* We used to send a LAP_DISC_INDICATION here, but this was | |
222 | * racy. This has been move within irlmp_unregister_link() | |
223 | * itself. Jean II */ | |
224 | ||
225 | /* Kill the LAP and all LSAPs on top of it */ | |
226 | irlmp_unregister_link(self->saddr); | |
227 | self->notify.instance = NULL; | |
228 | ||
229 | /* Be sure that we manage to remove ourself from the hash */ | |
230 | lap = hashbin_remove(irlap, self->saddr, NULL); | |
231 | if (!lap) { | |
0dc47877 | 232 | IRDA_DEBUG(1, "%s(), Didn't find myself!\n", __func__); |
1da177e4 LT |
233 | return; |
234 | } | |
235 | __irlap_close(lap); | |
236 | } | |
237 | EXPORT_SYMBOL(irlap_close); | |
238 | ||
239 | /* | |
240 | * Function irlap_connect_indication (self, skb) | |
241 | * | |
242 | * Another device is attempting to make a connection | |
243 | * | |
244 | */ | |
245 | void irlap_connect_indication(struct irlap_cb *self, struct sk_buff *skb) | |
246 | { | |
0dc47877 | 247 | IRDA_DEBUG(4, "%s()\n", __func__); |
1da177e4 LT |
248 | |
249 | IRDA_ASSERT(self != NULL, return;); | |
250 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
251 | ||
252 | irlap_init_qos_capabilities(self, NULL); /* No user QoS! */ | |
253 | ||
254 | irlmp_link_connect_indication(self->notify.instance, self->saddr, | |
255 | self->daddr, &self->qos_tx, skb); | |
256 | } | |
257 | ||
258 | /* | |
259 | * Function irlap_connect_response (self, skb) | |
260 | * | |
261 | * Service user has accepted incoming connection | |
262 | * | |
263 | */ | |
264 | void irlap_connect_response(struct irlap_cb *self, struct sk_buff *userdata) | |
265 | { | |
0dc47877 | 266 | IRDA_DEBUG(4, "%s()\n", __func__); |
1da177e4 LT |
267 | |
268 | irlap_do_event(self, CONNECT_RESPONSE, userdata, NULL); | |
269 | } | |
270 | ||
271 | /* | |
272 | * Function irlap_connect_request (self, daddr, qos_user, sniff) | |
273 | * | |
274 | * Request connection with another device, sniffing is not implemented | |
275 | * yet. | |
276 | * | |
277 | */ | |
278 | void irlap_connect_request(struct irlap_cb *self, __u32 daddr, | |
279 | struct qos_info *qos_user, int sniff) | |
280 | { | |
0dc47877 | 281 | IRDA_DEBUG(3, "%s(), daddr=0x%08x\n", __func__, daddr); |
1da177e4 LT |
282 | |
283 | IRDA_ASSERT(self != NULL, return;); | |
284 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
285 | ||
286 | self->daddr = daddr; | |
287 | ||
288 | /* | |
289 | * If the service user specifies QoS values for this connection, | |
290 | * then use them | |
291 | */ | |
292 | irlap_init_qos_capabilities(self, qos_user); | |
293 | ||
294 | if ((self->state == LAP_NDM) && !self->media_busy) | |
295 | irlap_do_event(self, CONNECT_REQUEST, NULL, NULL); | |
296 | else | |
297 | self->connect_pending = TRUE; | |
298 | } | |
299 | ||
300 | /* | |
301 | * Function irlap_connect_confirm (self, skb) | |
302 | * | |
303 | * Connection request has been accepted | |
304 | * | |
305 | */ | |
306 | void irlap_connect_confirm(struct irlap_cb *self, struct sk_buff *skb) | |
307 | { | |
0dc47877 | 308 | IRDA_DEBUG(4, "%s()\n", __func__); |
1da177e4 LT |
309 | |
310 | IRDA_ASSERT(self != NULL, return;); | |
311 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
312 | ||
313 | irlmp_link_connect_confirm(self->notify.instance, &self->qos_tx, skb); | |
314 | } | |
315 | ||
316 | /* | |
317 | * Function irlap_data_indication (self, skb) | |
318 | * | |
319 | * Received data frames from IR-port, so we just pass them up to | |
320 | * IrLMP for further processing | |
321 | * | |
322 | */ | |
323 | void irlap_data_indication(struct irlap_cb *self, struct sk_buff *skb, | |
324 | int unreliable) | |
325 | { | |
326 | /* Hide LAP header from IrLMP layer */ | |
327 | skb_pull(skb, LAP_ADDR_HEADER+LAP_CTRL_HEADER); | |
328 | ||
329 | irlmp_link_data_indication(self->notify.instance, skb, unreliable); | |
330 | } | |
331 | ||
332 | ||
333 | /* | |
334 | * Function irlap_data_request (self, skb) | |
335 | * | |
336 | * Queue data for transmission, must wait until XMIT state | |
337 | * | |
338 | */ | |
339 | void irlap_data_request(struct irlap_cb *self, struct sk_buff *skb, | |
340 | int unreliable) | |
341 | { | |
342 | IRDA_ASSERT(self != NULL, return;); | |
343 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
344 | ||
0dc47877 | 345 | IRDA_DEBUG(3, "%s()\n", __func__); |
1da177e4 LT |
346 | |
347 | IRDA_ASSERT(skb_headroom(skb) >= (LAP_ADDR_HEADER+LAP_CTRL_HEADER), | |
348 | return;); | |
349 | skb_push(skb, LAP_ADDR_HEADER+LAP_CTRL_HEADER); | |
350 | ||
351 | /* | |
352 | * Must set frame format now so that the rest of the code knows | |
353 | * if its dealing with an I or an UI frame | |
354 | */ | |
355 | if (unreliable) | |
356 | skb->data[1] = UI_FRAME; | |
357 | else | |
358 | skb->data[1] = I_FRAME; | |
359 | ||
360 | /* Don't forget to refcount it - see irlmp_connect_request(). */ | |
361 | skb_get(skb); | |
362 | ||
363 | /* Add at the end of the queue (keep ordering) - Jean II */ | |
364 | skb_queue_tail(&self->txq, skb); | |
365 | ||
366 | /* | |
367 | * Send event if this frame only if we are in the right state | |
368 | * FIXME: udata should be sent first! (skb_queue_head?) | |
369 | */ | |
370 | if ((self->state == LAP_XMIT_P) || (self->state == LAP_XMIT_S)) { | |
371 | /* If we are not already processing the Tx queue, trigger | |
372 | * transmission immediately - Jean II */ | |
373 | if((skb_queue_len(&self->txq) <= 1) && (!self->local_busy)) | |
374 | irlap_do_event(self, DATA_REQUEST, skb, NULL); | |
375 | /* Otherwise, the packets will be sent normally at the | |
376 | * next pf-poll - Jean II */ | |
377 | } | |
378 | } | |
379 | ||
380 | /* | |
381 | * Function irlap_unitdata_request (self, skb) | |
382 | * | |
383 | * Send Ultra data. This is data that must be sent outside any connection | |
384 | * | |
385 | */ | |
386 | #ifdef CONFIG_IRDA_ULTRA | |
387 | void irlap_unitdata_request(struct irlap_cb *self, struct sk_buff *skb) | |
388 | { | |
389 | IRDA_ASSERT(self != NULL, return;); | |
390 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
391 | ||
0dc47877 | 392 | IRDA_DEBUG(3, "%s()\n", __func__); |
1da177e4 LT |
393 | |
394 | IRDA_ASSERT(skb_headroom(skb) >= (LAP_ADDR_HEADER+LAP_CTRL_HEADER), | |
395 | return;); | |
396 | skb_push(skb, LAP_ADDR_HEADER+LAP_CTRL_HEADER); | |
397 | ||
398 | skb->data[0] = CBROADCAST; | |
399 | skb->data[1] = UI_FRAME; | |
400 | ||
401 | /* Don't need to refcount, see irlmp_connless_data_request() */ | |
402 | ||
403 | skb_queue_tail(&self->txq_ultra, skb); | |
404 | ||
405 | irlap_do_event(self, SEND_UI_FRAME, NULL, NULL); | |
406 | } | |
407 | #endif /*CONFIG_IRDA_ULTRA */ | |
408 | ||
409 | /* | |
410 | * Function irlap_udata_indication (self, skb) | |
411 | * | |
412 | * Receive Ultra data. This is data that is received outside any connection | |
413 | * | |
414 | */ | |
415 | #ifdef CONFIG_IRDA_ULTRA | |
416 | void irlap_unitdata_indication(struct irlap_cb *self, struct sk_buff *skb) | |
417 | { | |
0dc47877 | 418 | IRDA_DEBUG(1, "%s()\n", __func__); |
1da177e4 LT |
419 | |
420 | IRDA_ASSERT(self != NULL, return;); | |
421 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
422 | IRDA_ASSERT(skb != NULL, return;); | |
423 | ||
424 | /* Hide LAP header from IrLMP layer */ | |
425 | skb_pull(skb, LAP_ADDR_HEADER+LAP_CTRL_HEADER); | |
426 | ||
427 | irlmp_link_unitdata_indication(self->notify.instance, skb); | |
428 | } | |
429 | #endif /* CONFIG_IRDA_ULTRA */ | |
430 | ||
431 | /* | |
432 | * Function irlap_disconnect_request (void) | |
433 | * | |
434 | * Request to disconnect connection by service user | |
435 | */ | |
436 | void irlap_disconnect_request(struct irlap_cb *self) | |
437 | { | |
0dc47877 | 438 | IRDA_DEBUG(3, "%s()\n", __func__); |
1da177e4 LT |
439 | |
440 | IRDA_ASSERT(self != NULL, return;); | |
441 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
442 | ||
443 | /* Don't disconnect until all data frames are successfully sent */ | |
b03efcfb | 444 | if (!skb_queue_empty(&self->txq)) { |
1da177e4 | 445 | self->disconnect_pending = TRUE; |
1da177e4 LT |
446 | return; |
447 | } | |
448 | ||
449 | /* Check if we are in the right state for disconnecting */ | |
450 | switch (self->state) { | |
af901ca1 AGR |
451 | case LAP_XMIT_P: /* FALLTHROUGH */ |
452 | case LAP_XMIT_S: /* FALLTHROUGH */ | |
453 | case LAP_CONN: /* FALLTHROUGH */ | |
454 | case LAP_RESET_WAIT: /* FALLTHROUGH */ | |
1da177e4 LT |
455 | case LAP_RESET_CHECK: |
456 | irlap_do_event(self, DISCONNECT_REQUEST, NULL, NULL); | |
457 | break; | |
458 | default: | |
0dc47877 | 459 | IRDA_DEBUG(2, "%s(), disconnect pending!\n", __func__); |
1da177e4 LT |
460 | self->disconnect_pending = TRUE; |
461 | break; | |
462 | } | |
463 | } | |
464 | ||
465 | /* | |
466 | * Function irlap_disconnect_indication (void) | |
467 | * | |
468 | * Disconnect request from other device | |
469 | * | |
470 | */ | |
471 | void irlap_disconnect_indication(struct irlap_cb *self, LAP_REASON reason) | |
472 | { | |
0dc47877 | 473 | IRDA_DEBUG(1, "%s(), reason=%s\n", __func__, lap_reasons[reason]); |
1da177e4 LT |
474 | |
475 | IRDA_ASSERT(self != NULL, return;); | |
476 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
477 | ||
478 | /* Flush queues */ | |
479 | irlap_flush_all_queues(self); | |
480 | ||
481 | switch (reason) { | |
482 | case LAP_RESET_INDICATION: | |
0dc47877 | 483 | IRDA_DEBUG(1, "%s(), Sending reset request!\n", __func__); |
1da177e4 LT |
484 | irlap_do_event(self, RESET_REQUEST, NULL, NULL); |
485 | break; | |
af901ca1 AGR |
486 | case LAP_NO_RESPONSE: /* FALLTHROUGH */ |
487 | case LAP_DISC_INDICATION: /* FALLTHROUGH */ | |
488 | case LAP_FOUND_NONE: /* FALLTHROUGH */ | |
1da177e4 LT |
489 | case LAP_MEDIA_BUSY: |
490 | irlmp_link_disconnect_indication(self->notify.instance, self, | |
491 | reason, NULL); | |
492 | break; | |
493 | default: | |
0dc47877 | 494 | IRDA_ERROR("%s: Unknown reason %d\n", __func__, reason); |
1da177e4 LT |
495 | } |
496 | } | |
497 | ||
498 | /* | |
499 | * Function irlap_discovery_request (gen_addr_bit) | |
500 | * | |
501 | * Start one single discovery operation. | |
502 | * | |
503 | */ | |
504 | void irlap_discovery_request(struct irlap_cb *self, discovery_t *discovery) | |
505 | { | |
506 | struct irlap_info info; | |
507 | ||
508 | IRDA_ASSERT(self != NULL, return;); | |
509 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
510 | IRDA_ASSERT(discovery != NULL, return;); | |
511 | ||
0dc47877 | 512 | IRDA_DEBUG(4, "%s(), nslots = %d\n", __func__, discovery->nslots); |
1da177e4 LT |
513 | |
514 | IRDA_ASSERT((discovery->nslots == 1) || (discovery->nslots == 6) || | |
515 | (discovery->nslots == 8) || (discovery->nslots == 16), | |
516 | return;); | |
517 | ||
518 | /* Discovery is only possible in NDM mode */ | |
519 | if (self->state != LAP_NDM) { | |
520 | IRDA_DEBUG(4, "%s(), discovery only possible in NDM mode\n", | |
0dc47877 | 521 | __func__); |
1da177e4 LT |
522 | irlap_discovery_confirm(self, NULL); |
523 | /* Note : in theory, if we are not in NDM, we could postpone | |
524 | * the discovery like we do for connection request. | |
525 | * In practice, it's not worth it. If the media was busy, | |
526 | * it's likely next time around it won't be busy. If we are | |
527 | * in REPLY state, we will get passive discovery info & event. | |
528 | * Jean II */ | |
529 | return; | |
530 | } | |
531 | ||
532 | /* Check if last discovery request finished in time, or if | |
533 | * it was aborted due to the media busy flag. */ | |
534 | if (self->discovery_log != NULL) { | |
535 | hashbin_delete(self->discovery_log, (FREE_FUNC) kfree); | |
536 | self->discovery_log = NULL; | |
537 | } | |
538 | ||
539 | /* All operations will occur at predictable time, no need to lock */ | |
540 | self->discovery_log = hashbin_new(HB_NOLOCK); | |
541 | ||
542 | if (self->discovery_log == NULL) { | |
543 | IRDA_WARNING("%s(), Unable to allocate discovery log!\n", | |
0dc47877 | 544 | __func__); |
1da177e4 LT |
545 | return; |
546 | } | |
547 | ||
548 | info.S = discovery->nslots; /* Number of slots */ | |
549 | info.s = 0; /* Current slot */ | |
550 | ||
551 | self->discovery_cmd = discovery; | |
552 | info.discovery = discovery; | |
553 | ||
554 | /* sysctl_slot_timeout bounds are checked in irsysctl.c - Jean II */ | |
555 | self->slot_timeout = sysctl_slot_timeout * HZ / 1000; | |
556 | ||
557 | irlap_do_event(self, DISCOVERY_REQUEST, NULL, &info); | |
558 | } | |
559 | ||
560 | /* | |
561 | * Function irlap_discovery_confirm (log) | |
562 | * | |
563 | * A device has been discovered in front of this station, we | |
564 | * report directly to LMP. | |
565 | */ | |
566 | void irlap_discovery_confirm(struct irlap_cb *self, hashbin_t *discovery_log) | |
567 | { | |
568 | IRDA_ASSERT(self != NULL, return;); | |
569 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
570 | ||
571 | IRDA_ASSERT(self->notify.instance != NULL, return;); | |
572 | ||
573 | /* | |
574 | * Check for successful discovery, since we are then allowed to clear | |
575 | * the media busy condition (IrLAP 6.13.4 - p.94). This should allow | |
576 | * us to make connection attempts much faster and easier (i.e. no | |
577 | * collisions). | |
578 | * Setting media busy to false will also generate an event allowing | |
579 | * to process pending events in NDM state machine. | |
580 | * Note : the spec doesn't define what's a successful discovery is. | |
581 | * If we want Ultra to work, it's successful even if there is | |
582 | * nobody discovered - Jean II | |
583 | */ | |
584 | if (discovery_log) | |
585 | irda_device_set_media_busy(self->netdev, FALSE); | |
586 | ||
587 | /* Inform IrLMP */ | |
588 | irlmp_link_discovery_confirm(self->notify.instance, discovery_log); | |
589 | } | |
590 | ||
591 | /* | |
592 | * Function irlap_discovery_indication (log) | |
593 | * | |
594 | * Somebody is trying to discover us! | |
595 | * | |
596 | */ | |
597 | void irlap_discovery_indication(struct irlap_cb *self, discovery_t *discovery) | |
598 | { | |
0dc47877 | 599 | IRDA_DEBUG(4, "%s()\n", __func__); |
1da177e4 LT |
600 | |
601 | IRDA_ASSERT(self != NULL, return;); | |
602 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
603 | IRDA_ASSERT(discovery != NULL, return;); | |
604 | ||
605 | IRDA_ASSERT(self->notify.instance != NULL, return;); | |
606 | ||
607 | /* A device is very likely to connect immediately after it performs | |
608 | * a successful discovery. This means that in our case, we are much | |
609 | * more likely to receive a connection request over the medium. | |
610 | * So, we backoff to avoid collisions. | |
611 | * IrLAP spec 6.13.4 suggest 100ms... | |
612 | * Note : this little trick actually make a *BIG* difference. If I set | |
613 | * my Linux box with discovery enabled and one Ultra frame sent every | |
614 | * second, my Palm has no trouble connecting to it every time ! | |
615 | * Jean II */ | |
616 | irda_device_set_media_busy(self->netdev, SMALL); | |
617 | ||
618 | irlmp_link_discovery_indication(self->notify.instance, discovery); | |
619 | } | |
620 | ||
621 | /* | |
622 | * Function irlap_status_indication (quality_of_link) | |
623 | */ | |
624 | void irlap_status_indication(struct irlap_cb *self, int quality_of_link) | |
625 | { | |
626 | switch (quality_of_link) { | |
627 | case STATUS_NO_ACTIVITY: | |
628 | IRDA_MESSAGE("IrLAP, no activity on link!\n"); | |
629 | break; | |
630 | case STATUS_NOISY: | |
631 | IRDA_MESSAGE("IrLAP, noisy link!\n"); | |
632 | break; | |
633 | default: | |
634 | break; | |
635 | } | |
636 | irlmp_status_indication(self->notify.instance, | |
637 | quality_of_link, LOCK_NO_CHANGE); | |
638 | } | |
639 | ||
640 | /* | |
641 | * Function irlap_reset_indication (void) | |
642 | */ | |
643 | void irlap_reset_indication(struct irlap_cb *self) | |
644 | { | |
0dc47877 | 645 | IRDA_DEBUG(1, "%s()\n", __func__); |
1da177e4 LT |
646 | |
647 | IRDA_ASSERT(self != NULL, return;); | |
648 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
649 | ||
650 | if (self->state == LAP_RESET_WAIT) | |
651 | irlap_do_event(self, RESET_REQUEST, NULL, NULL); | |
652 | else | |
653 | irlap_do_event(self, RESET_RESPONSE, NULL, NULL); | |
654 | } | |
655 | ||
656 | /* | |
657 | * Function irlap_reset_confirm (void) | |
658 | */ | |
659 | void irlap_reset_confirm(void) | |
660 | { | |
0dc47877 | 661 | IRDA_DEBUG(1, "%s()\n", __func__); |
1da177e4 LT |
662 | } |
663 | ||
664 | /* | |
665 | * Function irlap_generate_rand_time_slot (S, s) | |
666 | * | |
667 | * Generate a random time slot between s and S-1 where | |
668 | * S = Number of slots (0 -> S-1) | |
669 | * s = Current slot | |
670 | */ | |
671 | int irlap_generate_rand_time_slot(int S, int s) | |
672 | { | |
673 | static int rand; | |
674 | int slot; | |
675 | ||
676 | IRDA_ASSERT((S - s) > 0, return 0;); | |
677 | ||
678 | rand += jiffies; | |
679 | rand ^= (rand << 12); | |
680 | rand ^= (rand >> 20); | |
681 | ||
682 | slot = s + rand % (S-s); | |
683 | ||
684 | IRDA_ASSERT((slot >= s) || (slot < S), return 0;); | |
685 | ||
686 | return slot; | |
687 | } | |
688 | ||
689 | /* | |
690 | * Function irlap_update_nr_received (nr) | |
691 | * | |
692 | * Remove all acknowledged frames in current window queue. This code is | |
693 | * not intuitive and you should not try to change it. If you think it | |
694 | * contains bugs, please mail a patch to the author instead. | |
695 | */ | |
696 | void irlap_update_nr_received(struct irlap_cb *self, int nr) | |
697 | { | |
698 | struct sk_buff *skb = NULL; | |
699 | int count = 0; | |
700 | ||
701 | /* | |
6819bc2e YH |
702 | * Remove all the ack-ed frames from the window queue. |
703 | */ | |
1da177e4 LT |
704 | |
705 | /* | |
706 | * Optimize for the common case. It is most likely that the receiver | |
707 | * will acknowledge all the frames we have sent! So in that case we | |
708 | * delete all frames stored in window. | |
709 | */ | |
710 | if (nr == self->vs) { | |
711 | while ((skb = skb_dequeue(&self->wx_list)) != NULL) { | |
712 | dev_kfree_skb(skb); | |
713 | } | |
714 | /* The last acked frame is the next to send minus one */ | |
715 | self->va = nr - 1; | |
716 | } else { | |
717 | /* Remove all acknowledged frames in current window */ | |
718 | while ((skb_peek(&self->wx_list) != NULL) && | |
719 | (((self->va+1) % 8) != nr)) | |
720 | { | |
721 | skb = skb_dequeue(&self->wx_list); | |
722 | dev_kfree_skb(skb); | |
723 | ||
724 | self->va = (self->va + 1) % 8; | |
725 | count++; | |
726 | } | |
727 | } | |
728 | ||
729 | /* Advance window */ | |
730 | self->window = self->window_size - skb_queue_len(&self->wx_list); | |
731 | } | |
732 | ||
733 | /* | |
734 | * Function irlap_validate_ns_received (ns) | |
735 | * | |
736 | * Validate the next to send (ns) field from received frame. | |
737 | */ | |
738 | int irlap_validate_ns_received(struct irlap_cb *self, int ns) | |
739 | { | |
740 | /* ns as expected? */ | |
741 | if (ns == self->vr) | |
742 | return NS_EXPECTED; | |
743 | /* | |
744 | * Stations are allowed to treat invalid NS as unexpected NS | |
745 | * IrLAP, Recv ... with-invalid-Ns. p. 84 | |
746 | */ | |
747 | return NS_UNEXPECTED; | |
748 | ||
749 | /* return NR_INVALID; */ | |
750 | } | |
751 | /* | |
752 | * Function irlap_validate_nr_received (nr) | |
753 | * | |
754 | * Validate the next to receive (nr) field from received frame. | |
755 | * | |
756 | */ | |
757 | int irlap_validate_nr_received(struct irlap_cb *self, int nr) | |
758 | { | |
759 | /* nr as expected? */ | |
760 | if (nr == self->vs) { | |
0dc47877 | 761 | IRDA_DEBUG(4, "%s(), expected!\n", __func__); |
1da177e4 LT |
762 | return NR_EXPECTED; |
763 | } | |
764 | ||
765 | /* | |
766 | * unexpected nr? (but within current window), first we check if the | |
767 | * ns numbers of the frames in the current window wrap. | |
768 | */ | |
769 | if (self->va < self->vs) { | |
770 | if ((nr >= self->va) && (nr <= self->vs)) | |
771 | return NR_UNEXPECTED; | |
772 | } else { | |
773 | if ((nr >= self->va) || (nr <= self->vs)) | |
774 | return NR_UNEXPECTED; | |
775 | } | |
776 | ||
777 | /* Invalid nr! */ | |
778 | return NR_INVALID; | |
779 | } | |
780 | ||
781 | /* | |
782 | * Function irlap_initiate_connection_state () | |
783 | * | |
784 | * Initialize the connection state parameters | |
785 | * | |
786 | */ | |
787 | void irlap_initiate_connection_state(struct irlap_cb *self) | |
788 | { | |
0dc47877 | 789 | IRDA_DEBUG(4, "%s()\n", __func__); |
1da177e4 LT |
790 | |
791 | IRDA_ASSERT(self != NULL, return;); | |
792 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
793 | ||
794 | /* Next to send and next to receive */ | |
795 | self->vs = self->vr = 0; | |
796 | ||
797 | /* Last frame which got acked (0 - 1) % 8 */ | |
798 | self->va = 7; | |
799 | ||
800 | self->window = 1; | |
801 | ||
802 | self->remote_busy = FALSE; | |
803 | self->retry_count = 0; | |
804 | } | |
805 | ||
806 | /* | |
807 | * Function irlap_wait_min_turn_around (self, qos) | |
808 | * | |
809 | * Wait negotiated minimum turn around time, this function actually sets | |
810 | * the number of BOS's that must be sent before the next transmitted | |
811 | * frame in order to delay for the specified amount of time. This is | |
812 | * done to avoid using timers, and the forbidden udelay! | |
813 | */ | |
814 | void irlap_wait_min_turn_around(struct irlap_cb *self, struct qos_info *qos) | |
815 | { | |
816 | __u32 min_turn_time; | |
817 | __u32 speed; | |
818 | ||
819 | /* Get QoS values. */ | |
820 | speed = qos->baud_rate.value; | |
821 | min_turn_time = qos->min_turn_time.value; | |
822 | ||
823 | /* No need to calculate XBOFs for speeds over 115200 bps */ | |
824 | if (speed > 115200) { | |
825 | self->mtt_required = min_turn_time; | |
826 | return; | |
827 | } | |
828 | ||
829 | /* | |
830 | * Send additional BOF's for the next frame for the requested | |
831 | * min turn time, so now we must calculate how many chars (XBOF's) we | |
832 | * must send for the requested time period (min turn time) | |
833 | */ | |
834 | self->xbofs_delay = irlap_min_turn_time_in_bytes(speed, min_turn_time); | |
835 | } | |
836 | ||
837 | /* | |
838 | * Function irlap_flush_all_queues (void) | |
839 | * | |
840 | * Flush all queues | |
841 | * | |
842 | */ | |
843 | void irlap_flush_all_queues(struct irlap_cb *self) | |
844 | { | |
845 | struct sk_buff* skb; | |
846 | ||
847 | IRDA_ASSERT(self != NULL, return;); | |
848 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
849 | ||
850 | /* Free transmission queue */ | |
851 | while ((skb = skb_dequeue(&self->txq)) != NULL) | |
852 | dev_kfree_skb(skb); | |
853 | ||
854 | while ((skb = skb_dequeue(&self->txq_ultra)) != NULL) | |
855 | dev_kfree_skb(skb); | |
856 | ||
857 | /* Free sliding window buffered packets */ | |
858 | while ((skb = skb_dequeue(&self->wx_list)) != NULL) | |
859 | dev_kfree_skb(skb); | |
860 | } | |
861 | ||
862 | /* | |
863 | * Function irlap_setspeed (self, speed) | |
864 | * | |
865 | * Change the speed of the IrDA port | |
866 | * | |
867 | */ | |
868 | static void irlap_change_speed(struct irlap_cb *self, __u32 speed, int now) | |
869 | { | |
870 | struct sk_buff *skb; | |
871 | ||
0dc47877 | 872 | IRDA_DEBUG(0, "%s(), setting speed to %d\n", __func__, speed); |
1da177e4 LT |
873 | |
874 | IRDA_ASSERT(self != NULL, return;); | |
875 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
876 | ||
877 | self->speed = speed; | |
878 | ||
879 | /* Change speed now, or just piggyback speed on frames */ | |
880 | if (now) { | |
881 | /* Send down empty frame to trigger speed change */ | |
485fb2c9 | 882 | skb = alloc_skb(0, GFP_ATOMIC); |
8c893ff6 FM |
883 | if (skb) |
884 | irlap_queue_xmit(self, skb); | |
1da177e4 LT |
885 | } |
886 | } | |
887 | ||
888 | /* | |
889 | * Function irlap_init_qos_capabilities (self, qos) | |
890 | * | |
891 | * Initialize QoS for this IrLAP session, What we do is to compute the | |
892 | * intersection of the QoS capabilities for the user, driver and for | |
893 | * IrLAP itself. Normally, IrLAP will not specify any values, but it can | |
894 | * be used to restrict certain values. | |
895 | */ | |
896 | static void irlap_init_qos_capabilities(struct irlap_cb *self, | |
897 | struct qos_info *qos_user) | |
898 | { | |
899 | IRDA_ASSERT(self != NULL, return;); | |
900 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
901 | IRDA_ASSERT(self->netdev != NULL, return;); | |
902 | ||
903 | /* Start out with the maximum QoS support possible */ | |
904 | irda_init_max_qos_capabilies(&self->qos_rx); | |
905 | ||
906 | /* Apply drivers QoS capabilities */ | |
907 | irda_qos_compute_intersection(&self->qos_rx, self->qos_dev); | |
908 | ||
909 | /* | |
910 | * Check for user supplied QoS parameters. The service user is only | |
911 | * allowed to supply these values. We check each parameter since the | |
912 | * user may not have set all of them. | |
913 | */ | |
914 | if (qos_user) { | |
0dc47877 | 915 | IRDA_DEBUG(1, "%s(), Found user specified QoS!\n", __func__); |
1da177e4 LT |
916 | |
917 | if (qos_user->baud_rate.bits) | |
918 | self->qos_rx.baud_rate.bits &= qos_user->baud_rate.bits; | |
919 | ||
920 | if (qos_user->max_turn_time.bits) | |
921 | self->qos_rx.max_turn_time.bits &= qos_user->max_turn_time.bits; | |
922 | if (qos_user->data_size.bits) | |
923 | self->qos_rx.data_size.bits &= qos_user->data_size.bits; | |
924 | ||
925 | if (qos_user->link_disc_time.bits) | |
926 | self->qos_rx.link_disc_time.bits &= qos_user->link_disc_time.bits; | |
927 | } | |
928 | ||
929 | /* Use 500ms in IrLAP for now */ | |
930 | self->qos_rx.max_turn_time.bits &= 0x01; | |
931 | ||
932 | /* Set data size */ | |
933 | /*self->qos_rx.data_size.bits &= 0x03;*/ | |
934 | ||
935 | irda_qos_bits_to_value(&self->qos_rx); | |
936 | } | |
937 | ||
938 | /* | |
939 | * Function irlap_apply_default_connection_parameters (void, now) | |
940 | * | |
941 | * Use the default connection and transmission parameters | |
942 | */ | |
943 | void irlap_apply_default_connection_parameters(struct irlap_cb *self) | |
944 | { | |
0dc47877 | 945 | IRDA_DEBUG(4, "%s()\n", __func__); |
1da177e4 LT |
946 | |
947 | IRDA_ASSERT(self != NULL, return;); | |
948 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
949 | ||
950 | /* xbofs : Default value in NDM */ | |
951 | self->next_bofs = 12; | |
952 | self->bofs_count = 12; | |
953 | ||
954 | /* NDM Speed is 9600 */ | |
955 | irlap_change_speed(self, 9600, TRUE); | |
956 | ||
957 | /* Set mbusy when going to NDM state */ | |
958 | irda_device_set_media_busy(self->netdev, TRUE); | |
959 | ||
960 | /* | |
961 | * Generate random connection address for this session, which must | |
962 | * be 7 bits wide and different from 0x00 and 0xfe | |
963 | */ | |
964 | while ((self->caddr == 0x00) || (self->caddr == 0xfe)) { | |
965 | get_random_bytes(&self->caddr, sizeof(self->caddr)); | |
966 | self->caddr &= 0xfe; | |
967 | } | |
968 | ||
969 | /* Use default values until connection has been negitiated */ | |
970 | self->slot_timeout = sysctl_slot_timeout; | |
971 | self->final_timeout = FINAL_TIMEOUT; | |
972 | self->poll_timeout = POLL_TIMEOUT; | |
973 | self->wd_timeout = WD_TIMEOUT; | |
974 | ||
975 | /* Set some default values */ | |
976 | self->qos_tx.baud_rate.value = 9600; | |
977 | self->qos_rx.baud_rate.value = 9600; | |
978 | self->qos_tx.max_turn_time.value = 0; | |
979 | self->qos_rx.max_turn_time.value = 0; | |
980 | self->qos_tx.min_turn_time.value = 0; | |
981 | self->qos_rx.min_turn_time.value = 0; | |
982 | self->qos_tx.data_size.value = 64; | |
983 | self->qos_rx.data_size.value = 64; | |
984 | self->qos_tx.window_size.value = 1; | |
985 | self->qos_rx.window_size.value = 1; | |
986 | self->qos_tx.additional_bofs.value = 12; | |
987 | self->qos_rx.additional_bofs.value = 12; | |
988 | self->qos_tx.link_disc_time.value = 0; | |
989 | self->qos_rx.link_disc_time.value = 0; | |
990 | ||
991 | irlap_flush_all_queues(self); | |
992 | ||
993 | self->disconnect_pending = FALSE; | |
994 | self->connect_pending = FALSE; | |
995 | } | |
996 | ||
997 | /* | |
998 | * Function irlap_apply_connection_parameters (qos, now) | |
999 | * | |
1000 | * Initialize IrLAP with the negotiated QoS values | |
1001 | * | |
1002 | * If 'now' is false, the speed and xbofs will be changed after the next | |
1003 | * frame is sent. | |
1004 | * If 'now' is true, the speed and xbofs is changed immediately | |
1005 | */ | |
1006 | void irlap_apply_connection_parameters(struct irlap_cb *self, int now) | |
1007 | { | |
0dc47877 | 1008 | IRDA_DEBUG(4, "%s()\n", __func__); |
1da177e4 LT |
1009 | |
1010 | IRDA_ASSERT(self != NULL, return;); | |
1011 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
1012 | ||
1013 | /* Set the negotiated xbofs value */ | |
1014 | self->next_bofs = self->qos_tx.additional_bofs.value; | |
1015 | if (now) | |
1016 | self->bofs_count = self->next_bofs; | |
1017 | ||
1018 | /* Set the negotiated link speed (may need the new xbofs value) */ | |
1019 | irlap_change_speed(self, self->qos_tx.baud_rate.value, now); | |
1020 | ||
1021 | self->window_size = self->qos_tx.window_size.value; | |
1022 | self->window = self->qos_tx.window_size.value; | |
1023 | ||
1024 | #ifdef CONFIG_IRDA_DYNAMIC_WINDOW | |
1025 | /* | |
1026 | * Calculate how many bytes it is possible to transmit before the | |
1027 | * link must be turned around | |
1028 | */ | |
1029 | self->line_capacity = | |
1030 | irlap_max_line_capacity(self->qos_tx.baud_rate.value, | |
1031 | self->qos_tx.max_turn_time.value); | |
1032 | self->bytes_left = self->line_capacity; | |
1033 | #endif /* CONFIG_IRDA_DYNAMIC_WINDOW */ | |
1034 | ||
1035 | ||
1036 | /* | |
1037 | * Initialize timeout values, some of the rules are listed on | |
1038 | * page 92 in IrLAP. | |
1039 | */ | |
1040 | IRDA_ASSERT(self->qos_tx.max_turn_time.value != 0, return;); | |
1041 | IRDA_ASSERT(self->qos_rx.max_turn_time.value != 0, return;); | |
1042 | /* The poll timeout applies only to the primary station. | |
1043 | * It defines the maximum time the primary stay in XMIT mode | |
1044 | * before timeout and turning the link around (sending a RR). | |
1045 | * Or, this is how much we can keep the pf bit in primary mode. | |
1046 | * Therefore, it must be lower or equal than our *OWN* max turn around. | |
1047 | * Jean II */ | |
1048 | self->poll_timeout = self->qos_tx.max_turn_time.value * HZ / 1000; | |
1049 | /* The Final timeout applies only to the primary station. | |
1050 | * It defines the maximum time the primary wait (mostly in RECV mode) | |
1051 | * for an answer from the secondary station before polling it again. | |
1052 | * Therefore, it must be greater or equal than our *PARTNER* | |
1053 | * max turn around time - Jean II */ | |
1054 | self->final_timeout = self->qos_rx.max_turn_time.value * HZ / 1000; | |
1055 | /* The Watchdog Bit timeout applies only to the secondary station. | |
1056 | * It defines the maximum time the secondary wait (mostly in RECV mode) | |
1057 | * for poll from the primary station before getting annoyed. | |
1058 | * Therefore, it must be greater or equal than our *PARTNER* | |
1059 | * max turn around time - Jean II */ | |
1060 | self->wd_timeout = self->final_timeout * 2; | |
1061 | ||
1062 | /* | |
1063 | * N1 and N2 are maximum retry count for *both* the final timer | |
1064 | * and the wd timer (with a factor 2) as defined above. | |
1065 | * After N1 retry of a timer, we give a warning to the user. | |
1066 | * After N2 retry, we consider the link dead and disconnect it. | |
1067 | * Jean II | |
1068 | */ | |
1069 | ||
1070 | /* | |
1071 | * Set N1 to 0 if Link Disconnect/Threshold Time = 3 and set it to | |
1072 | * 3 seconds otherwise. See page 71 in IrLAP for more details. | |
1073 | * Actually, it's not always 3 seconds, as we allow to set | |
1074 | * it via sysctl... Max maxtt is 500ms, and N1 need to be multiple | |
1075 | * of 2, so 1 second is minimum we can allow. - Jean II | |
1076 | */ | |
1077 | if (self->qos_tx.link_disc_time.value == sysctl_warn_noreply_time) | |
1078 | /* | |
1079 | * If we set N1 to 0, it will trigger immediately, which is | |
1080 | * not what we want. What we really want is to disable it, | |
1081 | * Jean II | |
1082 | */ | |
1083 | self->N1 = -2; /* Disable - Need to be multiple of 2*/ | |
1084 | else | |
1085 | self->N1 = sysctl_warn_noreply_time * 1000 / | |
1086 | self->qos_rx.max_turn_time.value; | |
1087 | ||
1088 | IRDA_DEBUG(4, "Setting N1 = %d\n", self->N1); | |
1089 | ||
1090 | /* Set N2 to match our own disconnect time */ | |
1091 | self->N2 = self->qos_tx.link_disc_time.value * 1000 / | |
1092 | self->qos_rx.max_turn_time.value; | |
1093 | IRDA_DEBUG(4, "Setting N2 = %d\n", self->N2); | |
1094 | } | |
1095 | ||
1096 | #ifdef CONFIG_PROC_FS | |
1097 | struct irlap_iter_state { | |
1098 | int id; | |
1099 | }; | |
1100 | ||
1101 | static void *irlap_seq_start(struct seq_file *seq, loff_t *pos) | |
1102 | { | |
1103 | struct irlap_iter_state *iter = seq->private; | |
1104 | struct irlap_cb *self; | |
1105 | ||
1106 | /* Protect our access to the tsap list */ | |
1107 | spin_lock_irq(&irlap->hb_spinlock); | |
1108 | iter->id = 0; | |
1109 | ||
6819bc2e | 1110 | for (self = (struct irlap_cb *) hashbin_get_first(irlap); |
1da177e4 LT |
1111 | self; self = (struct irlap_cb *) hashbin_get_next(irlap)) { |
1112 | if (iter->id == *pos) | |
1113 | break; | |
1114 | ++iter->id; | |
1115 | } | |
6819bc2e | 1116 | |
1da177e4 LT |
1117 | return self; |
1118 | } | |
1119 | ||
1120 | static void *irlap_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1121 | { | |
1122 | struct irlap_iter_state *iter = seq->private; | |
1123 | ||
1124 | ++*pos; | |
1125 | ++iter->id; | |
1126 | return (void *) hashbin_get_next(irlap); | |
1127 | } | |
1128 | ||
1129 | static void irlap_seq_stop(struct seq_file *seq, void *v) | |
1130 | { | |
1131 | spin_unlock_irq(&irlap->hb_spinlock); | |
1132 | } | |
1133 | ||
1134 | static int irlap_seq_show(struct seq_file *seq, void *v) | |
1135 | { | |
1136 | const struct irlap_iter_state *iter = seq->private; | |
1137 | const struct irlap_cb *self = v; | |
6819bc2e | 1138 | |
1da177e4 LT |
1139 | IRDA_ASSERT(self->magic == LAP_MAGIC, return -EINVAL;); |
1140 | ||
1141 | seq_printf(seq, "irlap%d ", iter->id); | |
1142 | seq_printf(seq, "state: %s\n", | |
1143 | irlap_state[self->state]); | |
1144 | ||
1145 | seq_printf(seq, " device name: %s, ", | |
1146 | (self->netdev) ? self->netdev->name : "bug"); | |
1147 | seq_printf(seq, "hardware name: %s\n", self->hw_name); | |
1148 | ||
1149 | seq_printf(seq, " caddr: %#02x, ", self->caddr); | |
1150 | seq_printf(seq, "saddr: %#08x, ", self->saddr); | |
1151 | seq_printf(seq, "daddr: %#08x\n", self->daddr); | |
1152 | ||
1153 | seq_printf(seq, " win size: %d, ", | |
1154 | self->window_size); | |
1155 | seq_printf(seq, "win: %d, ", self->window); | |
1156 | #ifdef CONFIG_IRDA_DYNAMIC_WINDOW | |
1157 | seq_printf(seq, "line capacity: %d, ", | |
1158 | self->line_capacity); | |
1159 | seq_printf(seq, "bytes left: %d\n", self->bytes_left); | |
1160 | #endif /* CONFIG_IRDA_DYNAMIC_WINDOW */ | |
1161 | seq_printf(seq, " tx queue len: %d ", | |
1162 | skb_queue_len(&self->txq)); | |
1163 | seq_printf(seq, "win queue len: %d ", | |
1164 | skb_queue_len(&self->wx_list)); | |
1165 | seq_printf(seq, "rbusy: %s", self->remote_busy ? | |
1166 | "TRUE" : "FALSE"); | |
1167 | seq_printf(seq, " mbusy: %s\n", self->media_busy ? | |
1168 | "TRUE" : "FALSE"); | |
1169 | ||
1170 | seq_printf(seq, " retrans: %d ", self->retry_count); | |
1171 | seq_printf(seq, "vs: %d ", self->vs); | |
1172 | seq_printf(seq, "vr: %d ", self->vr); | |
1173 | seq_printf(seq, "va: %d\n", self->va); | |
1174 | ||
1175 | seq_printf(seq, " qos\tbps\tmaxtt\tdsize\twinsize\taddbofs\tmintt\tldisc\tcomp\n"); | |
1176 | ||
1177 | seq_printf(seq, " tx\t%d\t", | |
1178 | self->qos_tx.baud_rate.value); | |
1179 | seq_printf(seq, "%d\t", | |
1180 | self->qos_tx.max_turn_time.value); | |
1181 | seq_printf(seq, "%d\t", | |
1182 | self->qos_tx.data_size.value); | |
1183 | seq_printf(seq, "%d\t", | |
1184 | self->qos_tx.window_size.value); | |
1185 | seq_printf(seq, "%d\t", | |
1186 | self->qos_tx.additional_bofs.value); | |
1187 | seq_printf(seq, "%d\t", | |
1188 | self->qos_tx.min_turn_time.value); | |
1189 | seq_printf(seq, "%d\t", | |
1190 | self->qos_tx.link_disc_time.value); | |
1191 | seq_printf(seq, "\n"); | |
1192 | ||
1193 | seq_printf(seq, " rx\t%d\t", | |
1194 | self->qos_rx.baud_rate.value); | |
1195 | seq_printf(seq, "%d\t", | |
1196 | self->qos_rx.max_turn_time.value); | |
1197 | seq_printf(seq, "%d\t", | |
1198 | self->qos_rx.data_size.value); | |
1199 | seq_printf(seq, "%d\t", | |
1200 | self->qos_rx.window_size.value); | |
1201 | seq_printf(seq, "%d\t", | |
1202 | self->qos_rx.additional_bofs.value); | |
1203 | seq_printf(seq, "%d\t", | |
1204 | self->qos_rx.min_turn_time.value); | |
1205 | seq_printf(seq, "%d\n", | |
1206 | self->qos_rx.link_disc_time.value); | |
1207 | ||
1208 | return 0; | |
1209 | } | |
1210 | ||
56b3d975 | 1211 | static const struct seq_operations irlap_seq_ops = { |
1da177e4 LT |
1212 | .start = irlap_seq_start, |
1213 | .next = irlap_seq_next, | |
1214 | .stop = irlap_seq_stop, | |
1215 | .show = irlap_seq_show, | |
1216 | }; | |
1217 | ||
1218 | static int irlap_seq_open(struct inode *inode, struct file *file) | |
1219 | { | |
a662d4cb PE |
1220 | if (irlap == NULL) |
1221 | return -EINVAL; | |
6819bc2e | 1222 | |
a662d4cb PE |
1223 | return seq_open_private(file, &irlap_seq_ops, |
1224 | sizeof(struct irlap_iter_state)); | |
1da177e4 LT |
1225 | } |
1226 | ||
da7071d7 | 1227 | const struct file_operations irlap_seq_fops = { |
1da177e4 LT |
1228 | .owner = THIS_MODULE, |
1229 | .open = irlap_seq_open, | |
1230 | .read = seq_read, | |
1231 | .llseek = seq_lseek, | |
1232 | .release = seq_release_private, | |
1233 | }; | |
1234 | ||
1235 | #endif /* CONFIG_PROC_FS */ |