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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 | |
26 | * along with this program; if not, write to the Free Software | |
27 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
28 | * MA 02111-1307 USA | |
29 | * | |
30 | ********************************************************************/ | |
31 | ||
1da177e4 LT |
32 | #include <linux/slab.h> |
33 | #include <linux/string.h> | |
34 | #include <linux/skbuff.h> | |
35 | #include <linux/delay.h> | |
36 | #include <linux/proc_fs.h> | |
37 | #include <linux/init.h> | |
38 | #include <linux/random.h> | |
39 | #include <linux/module.h> | |
40 | #include <linux/seq_file.h> | |
41 | ||
42 | #include <net/irda/irda.h> | |
43 | #include <net/irda/irda_device.h> | |
44 | #include <net/irda/irqueue.h> | |
45 | #include <net/irda/irlmp.h> | |
46 | #include <net/irda/irlmp_frame.h> | |
47 | #include <net/irda/irlap_frame.h> | |
48 | #include <net/irda/irlap.h> | |
49 | #include <net/irda/timer.h> | |
50 | #include <net/irda/qos.h> | |
51 | ||
52 | static hashbin_t *irlap = NULL; | |
53 | int sysctl_slot_timeout = SLOT_TIMEOUT * 1000 / HZ; | |
54 | ||
55 | /* This is the delay of missed pf period before generating an event | |
56 | * to the application. The spec mandate 3 seconds, but in some cases | |
57 | * it's way too long. - Jean II */ | |
58 | int sysctl_warn_noreply_time = 3; | |
59 | ||
60 | extern void irlap_queue_xmit(struct irlap_cb *self, struct sk_buff *skb); | |
61 | static void __irlap_close(struct irlap_cb *self); | |
62 | static void irlap_init_qos_capabilities(struct irlap_cb *self, | |
63 | struct qos_info *qos_user); | |
64 | ||
65 | #ifdef CONFIG_IRDA_DEBUG | |
36cbd3dc | 66 | static const char *const lap_reasons[] = { |
1da177e4 LT |
67 | "ERROR, NOT USED", |
68 | "LAP_DISC_INDICATION", | |
69 | "LAP_NO_RESPONSE", | |
70 | "LAP_RESET_INDICATION", | |
71 | "LAP_FOUND_NONE", | |
72 | "LAP_MEDIA_BUSY", | |
73 | "LAP_PRIMARY_CONFLICT", | |
74 | "ERROR, NOT USED", | |
75 | }; | |
76 | #endif /* CONFIG_IRDA_DEBUG */ | |
77 | ||
78 | int __init irlap_init(void) | |
79 | { | |
80 | /* Check if the compiler did its job properly. | |
81 | * May happen on some ARM configuration, check with Russell King. */ | |
82 | IRDA_ASSERT(sizeof(struct xid_frame) == 14, ;); | |
83 | IRDA_ASSERT(sizeof(struct test_frame) == 10, ;); | |
84 | IRDA_ASSERT(sizeof(struct ua_frame) == 10, ;); | |
85 | IRDA_ASSERT(sizeof(struct snrm_frame) == 11, ;); | |
86 | ||
87 | /* Allocate master array */ | |
88 | irlap = hashbin_new(HB_LOCK); | |
89 | if (irlap == NULL) { | |
6819bc2e | 90 | IRDA_ERROR("%s: can't allocate irlap hashbin!\n", |
0dc47877 | 91 | __func__); |
1da177e4 LT |
92 | return -ENOMEM; |
93 | } | |
94 | ||
95 | return 0; | |
96 | } | |
97 | ||
75a69ac6 | 98 | void irlap_cleanup(void) |
1da177e4 LT |
99 | { |
100 | IRDA_ASSERT(irlap != NULL, return;); | |
101 | ||
102 | hashbin_delete(irlap, (FREE_FUNC) __irlap_close); | |
103 | } | |
104 | ||
105 | /* | |
106 | * Function irlap_open (driver) | |
107 | * | |
108 | * Initialize IrLAP layer | |
109 | * | |
110 | */ | |
111 | struct irlap_cb *irlap_open(struct net_device *dev, struct qos_info *qos, | |
112 | const char *hw_name) | |
113 | { | |
114 | struct irlap_cb *self; | |
115 | ||
0dc47877 | 116 | IRDA_DEBUG(4, "%s()\n", __func__); |
1da177e4 LT |
117 | |
118 | /* Initialize the irlap structure. */ | |
0da974f4 | 119 | self = kzalloc(sizeof(struct irlap_cb), GFP_KERNEL); |
1da177e4 LT |
120 | if (self == NULL) |
121 | return NULL; | |
122 | ||
1da177e4 LT |
123 | self->magic = LAP_MAGIC; |
124 | ||
125 | /* Make a binding between the layers */ | |
126 | self->netdev = dev; | |
127 | self->qos_dev = qos; | |
128 | /* Copy hardware name */ | |
129 | if(hw_name != NULL) { | |
130 | strlcpy(self->hw_name, hw_name, sizeof(self->hw_name)); | |
131 | } else { | |
132 | self->hw_name[0] = '\0'; | |
133 | } | |
134 | ||
135 | /* FIXME: should we get our own field? */ | |
136 | dev->atalk_ptr = self; | |
137 | ||
138 | self->state = LAP_OFFLINE; | |
139 | ||
140 | /* Initialize transmit queue */ | |
141 | skb_queue_head_init(&self->txq); | |
142 | skb_queue_head_init(&self->txq_ultra); | |
143 | skb_queue_head_init(&self->wx_list); | |
144 | ||
145 | /* My unique IrLAP device address! */ | |
146 | /* We don't want the broadcast address, neither the NULL address | |
147 | * (most often used to signify "invalid"), and we don't want an | |
148 | * address already in use (otherwise connect won't be able | |
149 | * to select the proper link). - Jean II */ | |
150 | do { | |
151 | get_random_bytes(&self->saddr, sizeof(self->saddr)); | |
152 | } while ((self->saddr == 0x0) || (self->saddr == BROADCAST) || | |
153 | (hashbin_lock_find(irlap, self->saddr, NULL)) ); | |
154 | /* Copy to the driver */ | |
155 | memcpy(dev->dev_addr, &self->saddr, 4); | |
156 | ||
157 | init_timer(&self->slot_timer); | |
158 | init_timer(&self->query_timer); | |
159 | init_timer(&self->discovery_timer); | |
160 | init_timer(&self->final_timer); | |
161 | init_timer(&self->poll_timer); | |
162 | init_timer(&self->wd_timer); | |
163 | init_timer(&self->backoff_timer); | |
164 | init_timer(&self->media_busy_timer); | |
165 | ||
166 | irlap_apply_default_connection_parameters(self); | |
167 | ||
168 | self->N3 = 3; /* # connections attemts to try before giving up */ | |
169 | ||
170 | self->state = LAP_NDM; | |
171 | ||
172 | hashbin_insert(irlap, (irda_queue_t *) self, self->saddr, NULL); | |
173 | ||
174 | irlmp_register_link(self, self->saddr, &self->notify); | |
175 | ||
176 | return self; | |
177 | } | |
178 | EXPORT_SYMBOL(irlap_open); | |
179 | ||
180 | /* | |
181 | * Function __irlap_close (self) | |
182 | * | |
183 | * Remove IrLAP and all allocated memory. Stop any pending timers. | |
184 | * | |
185 | */ | |
186 | static void __irlap_close(struct irlap_cb *self) | |
187 | { | |
188 | IRDA_ASSERT(self != NULL, return;); | |
189 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
190 | ||
191 | /* Stop timers */ | |
192 | del_timer(&self->slot_timer); | |
193 | del_timer(&self->query_timer); | |
194 | del_timer(&self->discovery_timer); | |
195 | del_timer(&self->final_timer); | |
196 | del_timer(&self->poll_timer); | |
197 | del_timer(&self->wd_timer); | |
198 | del_timer(&self->backoff_timer); | |
199 | del_timer(&self->media_busy_timer); | |
200 | ||
201 | irlap_flush_all_queues(self); | |
202 | ||
203 | self->magic = 0; | |
204 | ||
205 | kfree(self); | |
206 | } | |
207 | ||
208 | /* | |
209 | * Function irlap_close (self) | |
210 | * | |
211 | * Remove IrLAP instance | |
212 | * | |
213 | */ | |
214 | void irlap_close(struct irlap_cb *self) | |
215 | { | |
216 | struct irlap_cb *lap; | |
217 | ||
0dc47877 | 218 | IRDA_DEBUG(4, "%s()\n", __func__); |
1da177e4 LT |
219 | |
220 | IRDA_ASSERT(self != NULL, return;); | |
221 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
222 | ||
223 | /* We used to send a LAP_DISC_INDICATION here, but this was | |
224 | * racy. This has been move within irlmp_unregister_link() | |
225 | * itself. Jean II */ | |
226 | ||
227 | /* Kill the LAP and all LSAPs on top of it */ | |
228 | irlmp_unregister_link(self->saddr); | |
229 | self->notify.instance = NULL; | |
230 | ||
231 | /* Be sure that we manage to remove ourself from the hash */ | |
232 | lap = hashbin_remove(irlap, self->saddr, NULL); | |
233 | if (!lap) { | |
0dc47877 | 234 | IRDA_DEBUG(1, "%s(), Didn't find myself!\n", __func__); |
1da177e4 LT |
235 | return; |
236 | } | |
237 | __irlap_close(lap); | |
238 | } | |
239 | EXPORT_SYMBOL(irlap_close); | |
240 | ||
241 | /* | |
242 | * Function irlap_connect_indication (self, skb) | |
243 | * | |
244 | * Another device is attempting to make a connection | |
245 | * | |
246 | */ | |
247 | void irlap_connect_indication(struct irlap_cb *self, struct sk_buff *skb) | |
248 | { | |
0dc47877 | 249 | IRDA_DEBUG(4, "%s()\n", __func__); |
1da177e4 LT |
250 | |
251 | IRDA_ASSERT(self != NULL, return;); | |
252 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
253 | ||
254 | irlap_init_qos_capabilities(self, NULL); /* No user QoS! */ | |
255 | ||
256 | irlmp_link_connect_indication(self->notify.instance, self->saddr, | |
257 | self->daddr, &self->qos_tx, skb); | |
258 | } | |
259 | ||
260 | /* | |
261 | * Function irlap_connect_response (self, skb) | |
262 | * | |
263 | * Service user has accepted incoming connection | |
264 | * | |
265 | */ | |
266 | void irlap_connect_response(struct irlap_cb *self, struct sk_buff *userdata) | |
267 | { | |
0dc47877 | 268 | IRDA_DEBUG(4, "%s()\n", __func__); |
1da177e4 LT |
269 | |
270 | irlap_do_event(self, CONNECT_RESPONSE, userdata, NULL); | |
271 | } | |
272 | ||
273 | /* | |
274 | * Function irlap_connect_request (self, daddr, qos_user, sniff) | |
275 | * | |
276 | * Request connection with another device, sniffing is not implemented | |
277 | * yet. | |
278 | * | |
279 | */ | |
280 | void irlap_connect_request(struct irlap_cb *self, __u32 daddr, | |
281 | struct qos_info *qos_user, int sniff) | |
282 | { | |
0dc47877 | 283 | IRDA_DEBUG(3, "%s(), daddr=0x%08x\n", __func__, daddr); |
1da177e4 LT |
284 | |
285 | IRDA_ASSERT(self != NULL, return;); | |
286 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
287 | ||
288 | self->daddr = daddr; | |
289 | ||
290 | /* | |
291 | * If the service user specifies QoS values for this connection, | |
292 | * then use them | |
293 | */ | |
294 | irlap_init_qos_capabilities(self, qos_user); | |
295 | ||
296 | if ((self->state == LAP_NDM) && !self->media_busy) | |
297 | irlap_do_event(self, CONNECT_REQUEST, NULL, NULL); | |
298 | else | |
299 | self->connect_pending = TRUE; | |
300 | } | |
301 | ||
302 | /* | |
303 | * Function irlap_connect_confirm (self, skb) | |
304 | * | |
305 | * Connection request has been accepted | |
306 | * | |
307 | */ | |
308 | void irlap_connect_confirm(struct irlap_cb *self, struct sk_buff *skb) | |
309 | { | |
0dc47877 | 310 | IRDA_DEBUG(4, "%s()\n", __func__); |
1da177e4 LT |
311 | |
312 | IRDA_ASSERT(self != NULL, return;); | |
313 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
314 | ||
315 | irlmp_link_connect_confirm(self->notify.instance, &self->qos_tx, skb); | |
316 | } | |
317 | ||
318 | /* | |
319 | * Function irlap_data_indication (self, skb) | |
320 | * | |
321 | * Received data frames from IR-port, so we just pass them up to | |
322 | * IrLMP for further processing | |
323 | * | |
324 | */ | |
325 | void irlap_data_indication(struct irlap_cb *self, struct sk_buff *skb, | |
326 | int unreliable) | |
327 | { | |
328 | /* Hide LAP header from IrLMP layer */ | |
329 | skb_pull(skb, LAP_ADDR_HEADER+LAP_CTRL_HEADER); | |
330 | ||
331 | irlmp_link_data_indication(self->notify.instance, skb, unreliable); | |
332 | } | |
333 | ||
334 | ||
335 | /* | |
336 | * Function irlap_data_request (self, skb) | |
337 | * | |
338 | * Queue data for transmission, must wait until XMIT state | |
339 | * | |
340 | */ | |
341 | void irlap_data_request(struct irlap_cb *self, struct sk_buff *skb, | |
342 | int unreliable) | |
343 | { | |
344 | IRDA_ASSERT(self != NULL, return;); | |
345 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
346 | ||
0dc47877 | 347 | IRDA_DEBUG(3, "%s()\n", __func__); |
1da177e4 LT |
348 | |
349 | IRDA_ASSERT(skb_headroom(skb) >= (LAP_ADDR_HEADER+LAP_CTRL_HEADER), | |
350 | return;); | |
351 | skb_push(skb, LAP_ADDR_HEADER+LAP_CTRL_HEADER); | |
352 | ||
353 | /* | |
354 | * Must set frame format now so that the rest of the code knows | |
355 | * if its dealing with an I or an UI frame | |
356 | */ | |
357 | if (unreliable) | |
358 | skb->data[1] = UI_FRAME; | |
359 | else | |
360 | skb->data[1] = I_FRAME; | |
361 | ||
362 | /* Don't forget to refcount it - see irlmp_connect_request(). */ | |
363 | skb_get(skb); | |
364 | ||
365 | /* Add at the end of the queue (keep ordering) - Jean II */ | |
366 | skb_queue_tail(&self->txq, skb); | |
367 | ||
368 | /* | |
369 | * Send event if this frame only if we are in the right state | |
370 | * FIXME: udata should be sent first! (skb_queue_head?) | |
371 | */ | |
372 | if ((self->state == LAP_XMIT_P) || (self->state == LAP_XMIT_S)) { | |
373 | /* If we are not already processing the Tx queue, trigger | |
374 | * transmission immediately - Jean II */ | |
375 | if((skb_queue_len(&self->txq) <= 1) && (!self->local_busy)) | |
376 | irlap_do_event(self, DATA_REQUEST, skb, NULL); | |
377 | /* Otherwise, the packets will be sent normally at the | |
378 | * next pf-poll - Jean II */ | |
379 | } | |
380 | } | |
381 | ||
382 | /* | |
383 | * Function irlap_unitdata_request (self, skb) | |
384 | * | |
385 | * Send Ultra data. This is data that must be sent outside any connection | |
386 | * | |
387 | */ | |
388 | #ifdef CONFIG_IRDA_ULTRA | |
389 | void irlap_unitdata_request(struct irlap_cb *self, struct sk_buff *skb) | |
390 | { | |
391 | IRDA_ASSERT(self != NULL, return;); | |
392 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
393 | ||
0dc47877 | 394 | IRDA_DEBUG(3, "%s()\n", __func__); |
1da177e4 LT |
395 | |
396 | IRDA_ASSERT(skb_headroom(skb) >= (LAP_ADDR_HEADER+LAP_CTRL_HEADER), | |
397 | return;); | |
398 | skb_push(skb, LAP_ADDR_HEADER+LAP_CTRL_HEADER); | |
399 | ||
400 | skb->data[0] = CBROADCAST; | |
401 | skb->data[1] = UI_FRAME; | |
402 | ||
403 | /* Don't need to refcount, see irlmp_connless_data_request() */ | |
404 | ||
405 | skb_queue_tail(&self->txq_ultra, skb); | |
406 | ||
407 | irlap_do_event(self, SEND_UI_FRAME, NULL, NULL); | |
408 | } | |
409 | #endif /*CONFIG_IRDA_ULTRA */ | |
410 | ||
411 | /* | |
412 | * Function irlap_udata_indication (self, skb) | |
413 | * | |
414 | * Receive Ultra data. This is data that is received outside any connection | |
415 | * | |
416 | */ | |
417 | #ifdef CONFIG_IRDA_ULTRA | |
418 | void irlap_unitdata_indication(struct irlap_cb *self, struct sk_buff *skb) | |
419 | { | |
0dc47877 | 420 | IRDA_DEBUG(1, "%s()\n", __func__); |
1da177e4 LT |
421 | |
422 | IRDA_ASSERT(self != NULL, return;); | |
423 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
424 | IRDA_ASSERT(skb != NULL, return;); | |
425 | ||
426 | /* Hide LAP header from IrLMP layer */ | |
427 | skb_pull(skb, LAP_ADDR_HEADER+LAP_CTRL_HEADER); | |
428 | ||
429 | irlmp_link_unitdata_indication(self->notify.instance, skb); | |
430 | } | |
431 | #endif /* CONFIG_IRDA_ULTRA */ | |
432 | ||
433 | /* | |
434 | * Function irlap_disconnect_request (void) | |
435 | * | |
436 | * Request to disconnect connection by service user | |
437 | */ | |
438 | void irlap_disconnect_request(struct irlap_cb *self) | |
439 | { | |
0dc47877 | 440 | IRDA_DEBUG(3, "%s()\n", __func__); |
1da177e4 LT |
441 | |
442 | IRDA_ASSERT(self != NULL, return;); | |
443 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
444 | ||
445 | /* Don't disconnect until all data frames are successfully sent */ | |
b03efcfb | 446 | if (!skb_queue_empty(&self->txq)) { |
1da177e4 | 447 | self->disconnect_pending = TRUE; |
1da177e4 LT |
448 | return; |
449 | } | |
450 | ||
451 | /* Check if we are in the right state for disconnecting */ | |
452 | switch (self->state) { | |
453 | case LAP_XMIT_P: /* FALLTROUGH */ | |
454 | case LAP_XMIT_S: /* FALLTROUGH */ | |
455 | case LAP_CONN: /* FALLTROUGH */ | |
456 | case LAP_RESET_WAIT: /* FALLTROUGH */ | |
457 | case LAP_RESET_CHECK: | |
458 | irlap_do_event(self, DISCONNECT_REQUEST, NULL, NULL); | |
459 | break; | |
460 | default: | |
0dc47877 | 461 | IRDA_DEBUG(2, "%s(), disconnect pending!\n", __func__); |
1da177e4 LT |
462 | self->disconnect_pending = TRUE; |
463 | break; | |
464 | } | |
465 | } | |
466 | ||
467 | /* | |
468 | * Function irlap_disconnect_indication (void) | |
469 | * | |
470 | * Disconnect request from other device | |
471 | * | |
472 | */ | |
473 | void irlap_disconnect_indication(struct irlap_cb *self, LAP_REASON reason) | |
474 | { | |
0dc47877 | 475 | IRDA_DEBUG(1, "%s(), reason=%s\n", __func__, lap_reasons[reason]); |
1da177e4 LT |
476 | |
477 | IRDA_ASSERT(self != NULL, return;); | |
478 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
479 | ||
480 | /* Flush queues */ | |
481 | irlap_flush_all_queues(self); | |
482 | ||
483 | switch (reason) { | |
484 | case LAP_RESET_INDICATION: | |
0dc47877 | 485 | IRDA_DEBUG(1, "%s(), Sending reset request!\n", __func__); |
1da177e4 LT |
486 | irlap_do_event(self, RESET_REQUEST, NULL, NULL); |
487 | break; | |
488 | case LAP_NO_RESPONSE: /* FALLTROUGH */ | |
489 | case LAP_DISC_INDICATION: /* FALLTROUGH */ | |
490 | case LAP_FOUND_NONE: /* FALLTROUGH */ | |
491 | case LAP_MEDIA_BUSY: | |
492 | irlmp_link_disconnect_indication(self->notify.instance, self, | |
493 | reason, NULL); | |
494 | break; | |
495 | default: | |
0dc47877 | 496 | IRDA_ERROR("%s: Unknown reason %d\n", __func__, reason); |
1da177e4 LT |
497 | } |
498 | } | |
499 | ||
500 | /* | |
501 | * Function irlap_discovery_request (gen_addr_bit) | |
502 | * | |
503 | * Start one single discovery operation. | |
504 | * | |
505 | */ | |
506 | void irlap_discovery_request(struct irlap_cb *self, discovery_t *discovery) | |
507 | { | |
508 | struct irlap_info info; | |
509 | ||
510 | IRDA_ASSERT(self != NULL, return;); | |
511 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
512 | IRDA_ASSERT(discovery != NULL, return;); | |
513 | ||
0dc47877 | 514 | IRDA_DEBUG(4, "%s(), nslots = %d\n", __func__, discovery->nslots); |
1da177e4 LT |
515 | |
516 | IRDA_ASSERT((discovery->nslots == 1) || (discovery->nslots == 6) || | |
517 | (discovery->nslots == 8) || (discovery->nslots == 16), | |
518 | return;); | |
519 | ||
520 | /* Discovery is only possible in NDM mode */ | |
521 | if (self->state != LAP_NDM) { | |
522 | IRDA_DEBUG(4, "%s(), discovery only possible in NDM mode\n", | |
0dc47877 | 523 | __func__); |
1da177e4 LT |
524 | irlap_discovery_confirm(self, NULL); |
525 | /* Note : in theory, if we are not in NDM, we could postpone | |
526 | * the discovery like we do for connection request. | |
527 | * In practice, it's not worth it. If the media was busy, | |
528 | * it's likely next time around it won't be busy. If we are | |
529 | * in REPLY state, we will get passive discovery info & event. | |
530 | * Jean II */ | |
531 | return; | |
532 | } | |
533 | ||
534 | /* Check if last discovery request finished in time, or if | |
535 | * it was aborted due to the media busy flag. */ | |
536 | if (self->discovery_log != NULL) { | |
537 | hashbin_delete(self->discovery_log, (FREE_FUNC) kfree); | |
538 | self->discovery_log = NULL; | |
539 | } | |
540 | ||
541 | /* All operations will occur at predictable time, no need to lock */ | |
542 | self->discovery_log = hashbin_new(HB_NOLOCK); | |
543 | ||
544 | if (self->discovery_log == NULL) { | |
545 | IRDA_WARNING("%s(), Unable to allocate discovery log!\n", | |
0dc47877 | 546 | __func__); |
1da177e4 LT |
547 | return; |
548 | } | |
549 | ||
550 | info.S = discovery->nslots; /* Number of slots */ | |
551 | info.s = 0; /* Current slot */ | |
552 | ||
553 | self->discovery_cmd = discovery; | |
554 | info.discovery = discovery; | |
555 | ||
556 | /* sysctl_slot_timeout bounds are checked in irsysctl.c - Jean II */ | |
557 | self->slot_timeout = sysctl_slot_timeout * HZ / 1000; | |
558 | ||
559 | irlap_do_event(self, DISCOVERY_REQUEST, NULL, &info); | |
560 | } | |
561 | ||
562 | /* | |
563 | * Function irlap_discovery_confirm (log) | |
564 | * | |
565 | * A device has been discovered in front of this station, we | |
566 | * report directly to LMP. | |
567 | */ | |
568 | void irlap_discovery_confirm(struct irlap_cb *self, hashbin_t *discovery_log) | |
569 | { | |
570 | IRDA_ASSERT(self != NULL, return;); | |
571 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
572 | ||
573 | IRDA_ASSERT(self->notify.instance != NULL, return;); | |
574 | ||
575 | /* | |
576 | * Check for successful discovery, since we are then allowed to clear | |
577 | * the media busy condition (IrLAP 6.13.4 - p.94). This should allow | |
578 | * us to make connection attempts much faster and easier (i.e. no | |
579 | * collisions). | |
580 | * Setting media busy to false will also generate an event allowing | |
581 | * to process pending events in NDM state machine. | |
582 | * Note : the spec doesn't define what's a successful discovery is. | |
583 | * If we want Ultra to work, it's successful even if there is | |
584 | * nobody discovered - Jean II | |
585 | */ | |
586 | if (discovery_log) | |
587 | irda_device_set_media_busy(self->netdev, FALSE); | |
588 | ||
589 | /* Inform IrLMP */ | |
590 | irlmp_link_discovery_confirm(self->notify.instance, discovery_log); | |
591 | } | |
592 | ||
593 | /* | |
594 | * Function irlap_discovery_indication (log) | |
595 | * | |
596 | * Somebody is trying to discover us! | |
597 | * | |
598 | */ | |
599 | void irlap_discovery_indication(struct irlap_cb *self, discovery_t *discovery) | |
600 | { | |
0dc47877 | 601 | IRDA_DEBUG(4, "%s()\n", __func__); |
1da177e4 LT |
602 | |
603 | IRDA_ASSERT(self != NULL, return;); | |
604 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
605 | IRDA_ASSERT(discovery != NULL, return;); | |
606 | ||
607 | IRDA_ASSERT(self->notify.instance != NULL, return;); | |
608 | ||
609 | /* A device is very likely to connect immediately after it performs | |
610 | * a successful discovery. This means that in our case, we are much | |
611 | * more likely to receive a connection request over the medium. | |
612 | * So, we backoff to avoid collisions. | |
613 | * IrLAP spec 6.13.4 suggest 100ms... | |
614 | * Note : this little trick actually make a *BIG* difference. If I set | |
615 | * my Linux box with discovery enabled and one Ultra frame sent every | |
616 | * second, my Palm has no trouble connecting to it every time ! | |
617 | * Jean II */ | |
618 | irda_device_set_media_busy(self->netdev, SMALL); | |
619 | ||
620 | irlmp_link_discovery_indication(self->notify.instance, discovery); | |
621 | } | |
622 | ||
623 | /* | |
624 | * Function irlap_status_indication (quality_of_link) | |
625 | */ | |
626 | void irlap_status_indication(struct irlap_cb *self, int quality_of_link) | |
627 | { | |
628 | switch (quality_of_link) { | |
629 | case STATUS_NO_ACTIVITY: | |
630 | IRDA_MESSAGE("IrLAP, no activity on link!\n"); | |
631 | break; | |
632 | case STATUS_NOISY: | |
633 | IRDA_MESSAGE("IrLAP, noisy link!\n"); | |
634 | break; | |
635 | default: | |
636 | break; | |
637 | } | |
638 | irlmp_status_indication(self->notify.instance, | |
639 | quality_of_link, LOCK_NO_CHANGE); | |
640 | } | |
641 | ||
642 | /* | |
643 | * Function irlap_reset_indication (void) | |
644 | */ | |
645 | void irlap_reset_indication(struct irlap_cb *self) | |
646 | { | |
0dc47877 | 647 | IRDA_DEBUG(1, "%s()\n", __func__); |
1da177e4 LT |
648 | |
649 | IRDA_ASSERT(self != NULL, return;); | |
650 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
651 | ||
652 | if (self->state == LAP_RESET_WAIT) | |
653 | irlap_do_event(self, RESET_REQUEST, NULL, NULL); | |
654 | else | |
655 | irlap_do_event(self, RESET_RESPONSE, NULL, NULL); | |
656 | } | |
657 | ||
658 | /* | |
659 | * Function irlap_reset_confirm (void) | |
660 | */ | |
661 | void irlap_reset_confirm(void) | |
662 | { | |
0dc47877 | 663 | IRDA_DEBUG(1, "%s()\n", __func__); |
1da177e4 LT |
664 | } |
665 | ||
666 | /* | |
667 | * Function irlap_generate_rand_time_slot (S, s) | |
668 | * | |
669 | * Generate a random time slot between s and S-1 where | |
670 | * S = Number of slots (0 -> S-1) | |
671 | * s = Current slot | |
672 | */ | |
673 | int irlap_generate_rand_time_slot(int S, int s) | |
674 | { | |
675 | static int rand; | |
676 | int slot; | |
677 | ||
678 | IRDA_ASSERT((S - s) > 0, return 0;); | |
679 | ||
680 | rand += jiffies; | |
681 | rand ^= (rand << 12); | |
682 | rand ^= (rand >> 20); | |
683 | ||
684 | slot = s + rand % (S-s); | |
685 | ||
686 | IRDA_ASSERT((slot >= s) || (slot < S), return 0;); | |
687 | ||
688 | return slot; | |
689 | } | |
690 | ||
691 | /* | |
692 | * Function irlap_update_nr_received (nr) | |
693 | * | |
694 | * Remove all acknowledged frames in current window queue. This code is | |
695 | * not intuitive and you should not try to change it. If you think it | |
696 | * contains bugs, please mail a patch to the author instead. | |
697 | */ | |
698 | void irlap_update_nr_received(struct irlap_cb *self, int nr) | |
699 | { | |
700 | struct sk_buff *skb = NULL; | |
701 | int count = 0; | |
702 | ||
703 | /* | |
6819bc2e YH |
704 | * Remove all the ack-ed frames from the window queue. |
705 | */ | |
1da177e4 LT |
706 | |
707 | /* | |
708 | * Optimize for the common case. It is most likely that the receiver | |
709 | * will acknowledge all the frames we have sent! So in that case we | |
710 | * delete all frames stored in window. | |
711 | */ | |
712 | if (nr == self->vs) { | |
713 | while ((skb = skb_dequeue(&self->wx_list)) != NULL) { | |
714 | dev_kfree_skb(skb); | |
715 | } | |
716 | /* The last acked frame is the next to send minus one */ | |
717 | self->va = nr - 1; | |
718 | } else { | |
719 | /* Remove all acknowledged frames in current window */ | |
720 | while ((skb_peek(&self->wx_list) != NULL) && | |
721 | (((self->va+1) % 8) != nr)) | |
722 | { | |
723 | skb = skb_dequeue(&self->wx_list); | |
724 | dev_kfree_skb(skb); | |
725 | ||
726 | self->va = (self->va + 1) % 8; | |
727 | count++; | |
728 | } | |
729 | } | |
730 | ||
731 | /* Advance window */ | |
732 | self->window = self->window_size - skb_queue_len(&self->wx_list); | |
733 | } | |
734 | ||
735 | /* | |
736 | * Function irlap_validate_ns_received (ns) | |
737 | * | |
738 | * Validate the next to send (ns) field from received frame. | |
739 | */ | |
740 | int irlap_validate_ns_received(struct irlap_cb *self, int ns) | |
741 | { | |
742 | /* ns as expected? */ | |
743 | if (ns == self->vr) | |
744 | return NS_EXPECTED; | |
745 | /* | |
746 | * Stations are allowed to treat invalid NS as unexpected NS | |
747 | * IrLAP, Recv ... with-invalid-Ns. p. 84 | |
748 | */ | |
749 | return NS_UNEXPECTED; | |
750 | ||
751 | /* return NR_INVALID; */ | |
752 | } | |
753 | /* | |
754 | * Function irlap_validate_nr_received (nr) | |
755 | * | |
756 | * Validate the next to receive (nr) field from received frame. | |
757 | * | |
758 | */ | |
759 | int irlap_validate_nr_received(struct irlap_cb *self, int nr) | |
760 | { | |
761 | /* nr as expected? */ | |
762 | if (nr == self->vs) { | |
0dc47877 | 763 | IRDA_DEBUG(4, "%s(), expected!\n", __func__); |
1da177e4 LT |
764 | return NR_EXPECTED; |
765 | } | |
766 | ||
767 | /* | |
768 | * unexpected nr? (but within current window), first we check if the | |
769 | * ns numbers of the frames in the current window wrap. | |
770 | */ | |
771 | if (self->va < self->vs) { | |
772 | if ((nr >= self->va) && (nr <= self->vs)) | |
773 | return NR_UNEXPECTED; | |
774 | } else { | |
775 | if ((nr >= self->va) || (nr <= self->vs)) | |
776 | return NR_UNEXPECTED; | |
777 | } | |
778 | ||
779 | /* Invalid nr! */ | |
780 | return NR_INVALID; | |
781 | } | |
782 | ||
783 | /* | |
784 | * Function irlap_initiate_connection_state () | |
785 | * | |
786 | * Initialize the connection state parameters | |
787 | * | |
788 | */ | |
789 | void irlap_initiate_connection_state(struct irlap_cb *self) | |
790 | { | |
0dc47877 | 791 | IRDA_DEBUG(4, "%s()\n", __func__); |
1da177e4 LT |
792 | |
793 | IRDA_ASSERT(self != NULL, return;); | |
794 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
795 | ||
796 | /* Next to send and next to receive */ | |
797 | self->vs = self->vr = 0; | |
798 | ||
799 | /* Last frame which got acked (0 - 1) % 8 */ | |
800 | self->va = 7; | |
801 | ||
802 | self->window = 1; | |
803 | ||
804 | self->remote_busy = FALSE; | |
805 | self->retry_count = 0; | |
806 | } | |
807 | ||
808 | /* | |
809 | * Function irlap_wait_min_turn_around (self, qos) | |
810 | * | |
811 | * Wait negotiated minimum turn around time, this function actually sets | |
812 | * the number of BOS's that must be sent before the next transmitted | |
813 | * frame in order to delay for the specified amount of time. This is | |
814 | * done to avoid using timers, and the forbidden udelay! | |
815 | */ | |
816 | void irlap_wait_min_turn_around(struct irlap_cb *self, struct qos_info *qos) | |
817 | { | |
818 | __u32 min_turn_time; | |
819 | __u32 speed; | |
820 | ||
821 | /* Get QoS values. */ | |
822 | speed = qos->baud_rate.value; | |
823 | min_turn_time = qos->min_turn_time.value; | |
824 | ||
825 | /* No need to calculate XBOFs for speeds over 115200 bps */ | |
826 | if (speed > 115200) { | |
827 | self->mtt_required = min_turn_time; | |
828 | return; | |
829 | } | |
830 | ||
831 | /* | |
832 | * Send additional BOF's for the next frame for the requested | |
833 | * min turn time, so now we must calculate how many chars (XBOF's) we | |
834 | * must send for the requested time period (min turn time) | |
835 | */ | |
836 | self->xbofs_delay = irlap_min_turn_time_in_bytes(speed, min_turn_time); | |
837 | } | |
838 | ||
839 | /* | |
840 | * Function irlap_flush_all_queues (void) | |
841 | * | |
842 | * Flush all queues | |
843 | * | |
844 | */ | |
845 | void irlap_flush_all_queues(struct irlap_cb *self) | |
846 | { | |
847 | struct sk_buff* skb; | |
848 | ||
849 | IRDA_ASSERT(self != NULL, return;); | |
850 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
851 | ||
852 | /* Free transmission queue */ | |
853 | while ((skb = skb_dequeue(&self->txq)) != NULL) | |
854 | dev_kfree_skb(skb); | |
855 | ||
856 | while ((skb = skb_dequeue(&self->txq_ultra)) != NULL) | |
857 | dev_kfree_skb(skb); | |
858 | ||
859 | /* Free sliding window buffered packets */ | |
860 | while ((skb = skb_dequeue(&self->wx_list)) != NULL) | |
861 | dev_kfree_skb(skb); | |
862 | } | |
863 | ||
864 | /* | |
865 | * Function irlap_setspeed (self, speed) | |
866 | * | |
867 | * Change the speed of the IrDA port | |
868 | * | |
869 | */ | |
870 | static void irlap_change_speed(struct irlap_cb *self, __u32 speed, int now) | |
871 | { | |
872 | struct sk_buff *skb; | |
873 | ||
0dc47877 | 874 | IRDA_DEBUG(0, "%s(), setting speed to %d\n", __func__, speed); |
1da177e4 LT |
875 | |
876 | IRDA_ASSERT(self != NULL, return;); | |
877 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
878 | ||
879 | self->speed = speed; | |
880 | ||
881 | /* Change speed now, or just piggyback speed on frames */ | |
882 | if (now) { | |
883 | /* Send down empty frame to trigger speed change */ | |
485fb2c9 | 884 | skb = alloc_skb(0, GFP_ATOMIC); |
8c893ff6 FM |
885 | if (skb) |
886 | irlap_queue_xmit(self, skb); | |
1da177e4 LT |
887 | } |
888 | } | |
889 | ||
890 | /* | |
891 | * Function irlap_init_qos_capabilities (self, qos) | |
892 | * | |
893 | * Initialize QoS for this IrLAP session, What we do is to compute the | |
894 | * intersection of the QoS capabilities for the user, driver and for | |
895 | * IrLAP itself. Normally, IrLAP will not specify any values, but it can | |
896 | * be used to restrict certain values. | |
897 | */ | |
898 | static void irlap_init_qos_capabilities(struct irlap_cb *self, | |
899 | struct qos_info *qos_user) | |
900 | { | |
901 | IRDA_ASSERT(self != NULL, return;); | |
902 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
903 | IRDA_ASSERT(self->netdev != NULL, return;); | |
904 | ||
905 | /* Start out with the maximum QoS support possible */ | |
906 | irda_init_max_qos_capabilies(&self->qos_rx); | |
907 | ||
908 | /* Apply drivers QoS capabilities */ | |
909 | irda_qos_compute_intersection(&self->qos_rx, self->qos_dev); | |
910 | ||
911 | /* | |
912 | * Check for user supplied QoS parameters. The service user is only | |
913 | * allowed to supply these values. We check each parameter since the | |
914 | * user may not have set all of them. | |
915 | */ | |
916 | if (qos_user) { | |
0dc47877 | 917 | IRDA_DEBUG(1, "%s(), Found user specified QoS!\n", __func__); |
1da177e4 LT |
918 | |
919 | if (qos_user->baud_rate.bits) | |
920 | self->qos_rx.baud_rate.bits &= qos_user->baud_rate.bits; | |
921 | ||
922 | if (qos_user->max_turn_time.bits) | |
923 | self->qos_rx.max_turn_time.bits &= qos_user->max_turn_time.bits; | |
924 | if (qos_user->data_size.bits) | |
925 | self->qos_rx.data_size.bits &= qos_user->data_size.bits; | |
926 | ||
927 | if (qos_user->link_disc_time.bits) | |
928 | self->qos_rx.link_disc_time.bits &= qos_user->link_disc_time.bits; | |
929 | } | |
930 | ||
931 | /* Use 500ms in IrLAP for now */ | |
932 | self->qos_rx.max_turn_time.bits &= 0x01; | |
933 | ||
934 | /* Set data size */ | |
935 | /*self->qos_rx.data_size.bits &= 0x03;*/ | |
936 | ||
937 | irda_qos_bits_to_value(&self->qos_rx); | |
938 | } | |
939 | ||
940 | /* | |
941 | * Function irlap_apply_default_connection_parameters (void, now) | |
942 | * | |
943 | * Use the default connection and transmission parameters | |
944 | */ | |
945 | void irlap_apply_default_connection_parameters(struct irlap_cb *self) | |
946 | { | |
0dc47877 | 947 | IRDA_DEBUG(4, "%s()\n", __func__); |
1da177e4 LT |
948 | |
949 | IRDA_ASSERT(self != NULL, return;); | |
950 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
951 | ||
952 | /* xbofs : Default value in NDM */ | |
953 | self->next_bofs = 12; | |
954 | self->bofs_count = 12; | |
955 | ||
956 | /* NDM Speed is 9600 */ | |
957 | irlap_change_speed(self, 9600, TRUE); | |
958 | ||
959 | /* Set mbusy when going to NDM state */ | |
960 | irda_device_set_media_busy(self->netdev, TRUE); | |
961 | ||
962 | /* | |
963 | * Generate random connection address for this session, which must | |
964 | * be 7 bits wide and different from 0x00 and 0xfe | |
965 | */ | |
966 | while ((self->caddr == 0x00) || (self->caddr == 0xfe)) { | |
967 | get_random_bytes(&self->caddr, sizeof(self->caddr)); | |
968 | self->caddr &= 0xfe; | |
969 | } | |
970 | ||
971 | /* Use default values until connection has been negitiated */ | |
972 | self->slot_timeout = sysctl_slot_timeout; | |
973 | self->final_timeout = FINAL_TIMEOUT; | |
974 | self->poll_timeout = POLL_TIMEOUT; | |
975 | self->wd_timeout = WD_TIMEOUT; | |
976 | ||
977 | /* Set some default values */ | |
978 | self->qos_tx.baud_rate.value = 9600; | |
979 | self->qos_rx.baud_rate.value = 9600; | |
980 | self->qos_tx.max_turn_time.value = 0; | |
981 | self->qos_rx.max_turn_time.value = 0; | |
982 | self->qos_tx.min_turn_time.value = 0; | |
983 | self->qos_rx.min_turn_time.value = 0; | |
984 | self->qos_tx.data_size.value = 64; | |
985 | self->qos_rx.data_size.value = 64; | |
986 | self->qos_tx.window_size.value = 1; | |
987 | self->qos_rx.window_size.value = 1; | |
988 | self->qos_tx.additional_bofs.value = 12; | |
989 | self->qos_rx.additional_bofs.value = 12; | |
990 | self->qos_tx.link_disc_time.value = 0; | |
991 | self->qos_rx.link_disc_time.value = 0; | |
992 | ||
993 | irlap_flush_all_queues(self); | |
994 | ||
995 | self->disconnect_pending = FALSE; | |
996 | self->connect_pending = FALSE; | |
997 | } | |
998 | ||
999 | /* | |
1000 | * Function irlap_apply_connection_parameters (qos, now) | |
1001 | * | |
1002 | * Initialize IrLAP with the negotiated QoS values | |
1003 | * | |
1004 | * If 'now' is false, the speed and xbofs will be changed after the next | |
1005 | * frame is sent. | |
1006 | * If 'now' is true, the speed and xbofs is changed immediately | |
1007 | */ | |
1008 | void irlap_apply_connection_parameters(struct irlap_cb *self, int now) | |
1009 | { | |
0dc47877 | 1010 | IRDA_DEBUG(4, "%s()\n", __func__); |
1da177e4 LT |
1011 | |
1012 | IRDA_ASSERT(self != NULL, return;); | |
1013 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); | |
1014 | ||
1015 | /* Set the negotiated xbofs value */ | |
1016 | self->next_bofs = self->qos_tx.additional_bofs.value; | |
1017 | if (now) | |
1018 | self->bofs_count = self->next_bofs; | |
1019 | ||
1020 | /* Set the negotiated link speed (may need the new xbofs value) */ | |
1021 | irlap_change_speed(self, self->qos_tx.baud_rate.value, now); | |
1022 | ||
1023 | self->window_size = self->qos_tx.window_size.value; | |
1024 | self->window = self->qos_tx.window_size.value; | |
1025 | ||
1026 | #ifdef CONFIG_IRDA_DYNAMIC_WINDOW | |
1027 | /* | |
1028 | * Calculate how many bytes it is possible to transmit before the | |
1029 | * link must be turned around | |
1030 | */ | |
1031 | self->line_capacity = | |
1032 | irlap_max_line_capacity(self->qos_tx.baud_rate.value, | |
1033 | self->qos_tx.max_turn_time.value); | |
1034 | self->bytes_left = self->line_capacity; | |
1035 | #endif /* CONFIG_IRDA_DYNAMIC_WINDOW */ | |
1036 | ||
1037 | ||
1038 | /* | |
1039 | * Initialize timeout values, some of the rules are listed on | |
1040 | * page 92 in IrLAP. | |
1041 | */ | |
1042 | IRDA_ASSERT(self->qos_tx.max_turn_time.value != 0, return;); | |
1043 | IRDA_ASSERT(self->qos_rx.max_turn_time.value != 0, return;); | |
1044 | /* The poll timeout applies only to the primary station. | |
1045 | * It defines the maximum time the primary stay in XMIT mode | |
1046 | * before timeout and turning the link around (sending a RR). | |
1047 | * Or, this is how much we can keep the pf bit in primary mode. | |
1048 | * Therefore, it must be lower or equal than our *OWN* max turn around. | |
1049 | * Jean II */ | |
1050 | self->poll_timeout = self->qos_tx.max_turn_time.value * HZ / 1000; | |
1051 | /* The Final timeout applies only to the primary station. | |
1052 | * It defines the maximum time the primary wait (mostly in RECV mode) | |
1053 | * for an answer from the secondary station before polling it again. | |
1054 | * Therefore, it must be greater or equal than our *PARTNER* | |
1055 | * max turn around time - Jean II */ | |
1056 | self->final_timeout = self->qos_rx.max_turn_time.value * HZ / 1000; | |
1057 | /* The Watchdog Bit timeout applies only to the secondary station. | |
1058 | * It defines the maximum time the secondary wait (mostly in RECV mode) | |
1059 | * for poll from the primary station before getting annoyed. | |
1060 | * Therefore, it must be greater or equal than our *PARTNER* | |
1061 | * max turn around time - Jean II */ | |
1062 | self->wd_timeout = self->final_timeout * 2; | |
1063 | ||
1064 | /* | |
1065 | * N1 and N2 are maximum retry count for *both* the final timer | |
1066 | * and the wd timer (with a factor 2) as defined above. | |
1067 | * After N1 retry of a timer, we give a warning to the user. | |
1068 | * After N2 retry, we consider the link dead and disconnect it. | |
1069 | * Jean II | |
1070 | */ | |
1071 | ||
1072 | /* | |
1073 | * Set N1 to 0 if Link Disconnect/Threshold Time = 3 and set it to | |
1074 | * 3 seconds otherwise. See page 71 in IrLAP for more details. | |
1075 | * Actually, it's not always 3 seconds, as we allow to set | |
1076 | * it via sysctl... Max maxtt is 500ms, and N1 need to be multiple | |
1077 | * of 2, so 1 second is minimum we can allow. - Jean II | |
1078 | */ | |
1079 | if (self->qos_tx.link_disc_time.value == sysctl_warn_noreply_time) | |
1080 | /* | |
1081 | * If we set N1 to 0, it will trigger immediately, which is | |
1082 | * not what we want. What we really want is to disable it, | |
1083 | * Jean II | |
1084 | */ | |
1085 | self->N1 = -2; /* Disable - Need to be multiple of 2*/ | |
1086 | else | |
1087 | self->N1 = sysctl_warn_noreply_time * 1000 / | |
1088 | self->qos_rx.max_turn_time.value; | |
1089 | ||
1090 | IRDA_DEBUG(4, "Setting N1 = %d\n", self->N1); | |
1091 | ||
1092 | /* Set N2 to match our own disconnect time */ | |
1093 | self->N2 = self->qos_tx.link_disc_time.value * 1000 / | |
1094 | self->qos_rx.max_turn_time.value; | |
1095 | IRDA_DEBUG(4, "Setting N2 = %d\n", self->N2); | |
1096 | } | |
1097 | ||
1098 | #ifdef CONFIG_PROC_FS | |
1099 | struct irlap_iter_state { | |
1100 | int id; | |
1101 | }; | |
1102 | ||
1103 | static void *irlap_seq_start(struct seq_file *seq, loff_t *pos) | |
1104 | { | |
1105 | struct irlap_iter_state *iter = seq->private; | |
1106 | struct irlap_cb *self; | |
1107 | ||
1108 | /* Protect our access to the tsap list */ | |
1109 | spin_lock_irq(&irlap->hb_spinlock); | |
1110 | iter->id = 0; | |
1111 | ||
6819bc2e | 1112 | for (self = (struct irlap_cb *) hashbin_get_first(irlap); |
1da177e4 LT |
1113 | self; self = (struct irlap_cb *) hashbin_get_next(irlap)) { |
1114 | if (iter->id == *pos) | |
1115 | break; | |
1116 | ++iter->id; | |
1117 | } | |
6819bc2e | 1118 | |
1da177e4 LT |
1119 | return self; |
1120 | } | |
1121 | ||
1122 | static void *irlap_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1123 | { | |
1124 | struct irlap_iter_state *iter = seq->private; | |
1125 | ||
1126 | ++*pos; | |
1127 | ++iter->id; | |
1128 | return (void *) hashbin_get_next(irlap); | |
1129 | } | |
1130 | ||
1131 | static void irlap_seq_stop(struct seq_file *seq, void *v) | |
1132 | { | |
1133 | spin_unlock_irq(&irlap->hb_spinlock); | |
1134 | } | |
1135 | ||
1136 | static int irlap_seq_show(struct seq_file *seq, void *v) | |
1137 | { | |
1138 | const struct irlap_iter_state *iter = seq->private; | |
1139 | const struct irlap_cb *self = v; | |
6819bc2e | 1140 | |
1da177e4 LT |
1141 | IRDA_ASSERT(self->magic == LAP_MAGIC, return -EINVAL;); |
1142 | ||
1143 | seq_printf(seq, "irlap%d ", iter->id); | |
1144 | seq_printf(seq, "state: %s\n", | |
1145 | irlap_state[self->state]); | |
1146 | ||
1147 | seq_printf(seq, " device name: %s, ", | |
1148 | (self->netdev) ? self->netdev->name : "bug"); | |
1149 | seq_printf(seq, "hardware name: %s\n", self->hw_name); | |
1150 | ||
1151 | seq_printf(seq, " caddr: %#02x, ", self->caddr); | |
1152 | seq_printf(seq, "saddr: %#08x, ", self->saddr); | |
1153 | seq_printf(seq, "daddr: %#08x\n", self->daddr); | |
1154 | ||
1155 | seq_printf(seq, " win size: %d, ", | |
1156 | self->window_size); | |
1157 | seq_printf(seq, "win: %d, ", self->window); | |
1158 | #ifdef CONFIG_IRDA_DYNAMIC_WINDOW | |
1159 | seq_printf(seq, "line capacity: %d, ", | |
1160 | self->line_capacity); | |
1161 | seq_printf(seq, "bytes left: %d\n", self->bytes_left); | |
1162 | #endif /* CONFIG_IRDA_DYNAMIC_WINDOW */ | |
1163 | seq_printf(seq, " tx queue len: %d ", | |
1164 | skb_queue_len(&self->txq)); | |
1165 | seq_printf(seq, "win queue len: %d ", | |
1166 | skb_queue_len(&self->wx_list)); | |
1167 | seq_printf(seq, "rbusy: %s", self->remote_busy ? | |
1168 | "TRUE" : "FALSE"); | |
1169 | seq_printf(seq, " mbusy: %s\n", self->media_busy ? | |
1170 | "TRUE" : "FALSE"); | |
1171 | ||
1172 | seq_printf(seq, " retrans: %d ", self->retry_count); | |
1173 | seq_printf(seq, "vs: %d ", self->vs); | |
1174 | seq_printf(seq, "vr: %d ", self->vr); | |
1175 | seq_printf(seq, "va: %d\n", self->va); | |
1176 | ||
1177 | seq_printf(seq, " qos\tbps\tmaxtt\tdsize\twinsize\taddbofs\tmintt\tldisc\tcomp\n"); | |
1178 | ||
1179 | seq_printf(seq, " tx\t%d\t", | |
1180 | self->qos_tx.baud_rate.value); | |
1181 | seq_printf(seq, "%d\t", | |
1182 | self->qos_tx.max_turn_time.value); | |
1183 | seq_printf(seq, "%d\t", | |
1184 | self->qos_tx.data_size.value); | |
1185 | seq_printf(seq, "%d\t", | |
1186 | self->qos_tx.window_size.value); | |
1187 | seq_printf(seq, "%d\t", | |
1188 | self->qos_tx.additional_bofs.value); | |
1189 | seq_printf(seq, "%d\t", | |
1190 | self->qos_tx.min_turn_time.value); | |
1191 | seq_printf(seq, "%d\t", | |
1192 | self->qos_tx.link_disc_time.value); | |
1193 | seq_printf(seq, "\n"); | |
1194 | ||
1195 | seq_printf(seq, " rx\t%d\t", | |
1196 | self->qos_rx.baud_rate.value); | |
1197 | seq_printf(seq, "%d\t", | |
1198 | self->qos_rx.max_turn_time.value); | |
1199 | seq_printf(seq, "%d\t", | |
1200 | self->qos_rx.data_size.value); | |
1201 | seq_printf(seq, "%d\t", | |
1202 | self->qos_rx.window_size.value); | |
1203 | seq_printf(seq, "%d\t", | |
1204 | self->qos_rx.additional_bofs.value); | |
1205 | seq_printf(seq, "%d\t", | |
1206 | self->qos_rx.min_turn_time.value); | |
1207 | seq_printf(seq, "%d\n", | |
1208 | self->qos_rx.link_disc_time.value); | |
1209 | ||
1210 | return 0; | |
1211 | } | |
1212 | ||
56b3d975 | 1213 | static const struct seq_operations irlap_seq_ops = { |
1da177e4 LT |
1214 | .start = irlap_seq_start, |
1215 | .next = irlap_seq_next, | |
1216 | .stop = irlap_seq_stop, | |
1217 | .show = irlap_seq_show, | |
1218 | }; | |
1219 | ||
1220 | static int irlap_seq_open(struct inode *inode, struct file *file) | |
1221 | { | |
a662d4cb PE |
1222 | if (irlap == NULL) |
1223 | return -EINVAL; | |
6819bc2e | 1224 | |
a662d4cb PE |
1225 | return seq_open_private(file, &irlap_seq_ops, |
1226 | sizeof(struct irlap_iter_state)); | |
1da177e4 LT |
1227 | } |
1228 | ||
da7071d7 | 1229 | const struct file_operations irlap_seq_fops = { |
1da177e4 LT |
1230 | .owner = THIS_MODULE, |
1231 | .open = irlap_seq_open, | |
1232 | .read = seq_read, | |
1233 | .llseek = seq_lseek, | |
1234 | .release = seq_release_private, | |
1235 | }; | |
1236 | ||
1237 | #endif /* CONFIG_PROC_FS */ |