Commit | Line | Data |
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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * ALSA sequencer Timing queue handling | |
4 | * Copyright (c) 1998-1999 by Frank van de Pol <fvdpol@coil.demon.nl> | |
5 | * | |
1da177e4 LT |
6 | * MAJOR CHANGES |
7 | * Nov. 13, 1999 Takashi Iwai <iwai@ww.uni-erlangen.de> | |
8 | * - Queues are allocated dynamically via ioctl. | |
9 | * - When owner client is deleted, all owned queues are deleted, too. | |
10 | * - Owner of unlocked queue is kept unmodified even if it is | |
11 | * manipulated by other clients. | |
12 | * - Owner field in SET_QUEUE_OWNER ioctl must be identical with the | |
13 | * caller client. i.e. Changing owner to a third client is not | |
14 | * allowed. | |
15 | * | |
16 | * Aug. 30, 2000 Takashi Iwai | |
17 | * - Queues are managed in static array again, but with better way. | |
18 | * The API itself is identical. | |
c7e0b5bf | 19 | * - The queue is locked when struct snd_seq_queue pointer is returned via |
1da177e4 LT |
20 | * queueptr(). This pointer *MUST* be released afterward by |
21 | * queuefree(ptr). | |
22 | * - Addition of experimental sync support. | |
23 | */ | |
24 | ||
1da177e4 LT |
25 | #include <linux/init.h> |
26 | #include <linux/slab.h> | |
27 | #include <sound/core.h> | |
28 | ||
29 | #include "seq_memory.h" | |
30 | #include "seq_queue.h" | |
31 | #include "seq_clientmgr.h" | |
32 | #include "seq_fifo.h" | |
33 | #include "seq_timer.h" | |
34 | #include "seq_info.h" | |
35 | ||
36 | /* list of allocated queues */ | |
c7e0b5bf | 37 | static struct snd_seq_queue *queue_list[SNDRV_SEQ_MAX_QUEUES]; |
1da177e4 LT |
38 | static DEFINE_SPINLOCK(queue_list_lock); |
39 | /* number of queues allocated */ | |
40 | static int num_queues; | |
41 | ||
42 | int snd_seq_queue_get_cur_queues(void) | |
43 | { | |
44 | return num_queues; | |
45 | } | |
46 | ||
47 | /*----------------------------------------------------------------*/ | |
48 | ||
49 | /* assign queue id and insert to list */ | |
c7e0b5bf | 50 | static int queue_list_add(struct snd_seq_queue *q) |
1da177e4 LT |
51 | { |
52 | int i; | |
1da177e4 | 53 | |
7c2e9821 | 54 | guard(spinlock_irqsave)(&queue_list_lock); |
1da177e4 LT |
55 | for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) { |
56 | if (! queue_list[i]) { | |
57 | queue_list[i] = q; | |
58 | q->queue = i; | |
59 | num_queues++; | |
1da177e4 LT |
60 | return i; |
61 | } | |
62 | } | |
1da177e4 LT |
63 | return -1; |
64 | } | |
65 | ||
c7e0b5bf | 66 | static struct snd_seq_queue *queue_list_remove(int id, int client) |
1da177e4 | 67 | { |
c7e0b5bf | 68 | struct snd_seq_queue *q; |
1da177e4 | 69 | |
7c2e9821 | 70 | guard(spinlock_irqsave)(&queue_list_lock); |
1da177e4 LT |
71 | q = queue_list[id]; |
72 | if (q) { | |
7c2e9821 | 73 | guard(spinlock)(&q->owner_lock); |
1da177e4 LT |
74 | if (q->owner == client) { |
75 | /* found */ | |
76 | q->klocked = 1; | |
1da177e4 LT |
77 | queue_list[id] = NULL; |
78 | num_queues--; | |
1da177e4 LT |
79 | return q; |
80 | } | |
1da177e4 | 81 | } |
1da177e4 LT |
82 | return NULL; |
83 | } | |
84 | ||
85 | /*----------------------------------------------------------------*/ | |
86 | ||
87 | /* create new queue (constructor) */ | |
c7e0b5bf | 88 | static struct snd_seq_queue *queue_new(int owner, int locked) |
1da177e4 | 89 | { |
c7e0b5bf | 90 | struct snd_seq_queue *q; |
1da177e4 | 91 | |
ecca82b4 | 92 | q = kzalloc(sizeof(*q), GFP_KERNEL); |
24db8bba | 93 | if (!q) |
1da177e4 | 94 | return NULL; |
1da177e4 LT |
95 | |
96 | spin_lock_init(&q->owner_lock); | |
97 | spin_lock_init(&q->check_lock); | |
1a60d4c5 | 98 | mutex_init(&q->timer_mutex); |
1da177e4 LT |
99 | snd_use_lock_init(&q->use_lock); |
100 | q->queue = -1; | |
101 | ||
102 | q->tickq = snd_seq_prioq_new(); | |
103 | q->timeq = snd_seq_prioq_new(); | |
104 | q->timer = snd_seq_timer_new(); | |
105 | if (q->tickq == NULL || q->timeq == NULL || q->timer == NULL) { | |
106 | snd_seq_prioq_delete(&q->tickq); | |
107 | snd_seq_prioq_delete(&q->timeq); | |
108 | snd_seq_timer_delete(&q->timer); | |
109 | kfree(q); | |
110 | return NULL; | |
111 | } | |
112 | ||
113 | q->owner = owner; | |
114 | q->locked = locked; | |
115 | q->klocked = 0; | |
116 | ||
117 | return q; | |
118 | } | |
119 | ||
120 | /* delete queue (destructor) */ | |
c7e0b5bf | 121 | static void queue_delete(struct snd_seq_queue *q) |
1da177e4 LT |
122 | { |
123 | /* stop and release the timer */ | |
3567eb6a | 124 | mutex_lock(&q->timer_mutex); |
1da177e4 LT |
125 | snd_seq_timer_stop(q->timer); |
126 | snd_seq_timer_close(q); | |
3567eb6a | 127 | mutex_unlock(&q->timer_mutex); |
1da177e4 LT |
128 | /* wait until access free */ |
129 | snd_use_lock_sync(&q->use_lock); | |
130 | /* release resources... */ | |
131 | snd_seq_prioq_delete(&q->tickq); | |
132 | snd_seq_prioq_delete(&q->timeq); | |
133 | snd_seq_timer_delete(&q->timer); | |
134 | ||
135 | kfree(q); | |
136 | } | |
137 | ||
138 | ||
139 | /*----------------------------------------------------------------*/ | |
140 | ||
1da177e4 | 141 | /* delete all existing queues */ |
00976ad5 | 142 | void snd_seq_queues_delete(void) |
1da177e4 LT |
143 | { |
144 | int i; | |
145 | ||
146 | /* clear list */ | |
147 | for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) { | |
148 | if (queue_list[i]) | |
149 | queue_delete(queue_list[i]); | |
150 | } | |
151 | } | |
152 | ||
4842e98f TI |
153 | static void queue_use(struct snd_seq_queue *queue, int client, int use); |
154 | ||
1da177e4 | 155 | /* allocate a new queue - |
7e1d90f6 DM |
156 | * return pointer to new queue or ERR_PTR(-errno) for error |
157 | * The new queue's use_lock is set to 1. It is the caller's responsibility to | |
158 | * call snd_use_lock_free(&q->use_lock). | |
1da177e4 | 159 | */ |
7e1d90f6 | 160 | struct snd_seq_queue *snd_seq_queue_alloc(int client, int locked, unsigned int info_flags) |
1da177e4 | 161 | { |
c7e0b5bf | 162 | struct snd_seq_queue *q; |
1da177e4 LT |
163 | |
164 | q = queue_new(client, locked); | |
165 | if (q == NULL) | |
7e1d90f6 | 166 | return ERR_PTR(-ENOMEM); |
1da177e4 | 167 | q->info_flags = info_flags; |
4842e98f | 168 | queue_use(q, client, 1); |
7e1d90f6 | 169 | snd_use_lock_use(&q->use_lock); |
1da177e4 | 170 | if (queue_list_add(q) < 0) { |
7e1d90f6 | 171 | snd_use_lock_free(&q->use_lock); |
1da177e4 | 172 | queue_delete(q); |
7e1d90f6 | 173 | return ERR_PTR(-ENOMEM); |
1da177e4 | 174 | } |
7e1d90f6 | 175 | return q; |
1da177e4 LT |
176 | } |
177 | ||
178 | /* delete a queue - queue must be owned by the client */ | |
179 | int snd_seq_queue_delete(int client, int queueid) | |
180 | { | |
c7e0b5bf | 181 | struct snd_seq_queue *q; |
1da177e4 LT |
182 | |
183 | if (queueid < 0 || queueid >= SNDRV_SEQ_MAX_QUEUES) | |
184 | return -EINVAL; | |
185 | q = queue_list_remove(queueid, client); | |
186 | if (q == NULL) | |
187 | return -EINVAL; | |
188 | queue_delete(q); | |
189 | ||
190 | return 0; | |
191 | } | |
192 | ||
193 | ||
194 | /* return pointer to queue structure for specified id */ | |
c7e0b5bf | 195 | struct snd_seq_queue *queueptr(int queueid) |
1da177e4 | 196 | { |
c7e0b5bf | 197 | struct snd_seq_queue *q; |
1da177e4 LT |
198 | |
199 | if (queueid < 0 || queueid >= SNDRV_SEQ_MAX_QUEUES) | |
200 | return NULL; | |
7c2e9821 | 201 | guard(spinlock_irqsave)(&queue_list_lock); |
1da177e4 LT |
202 | q = queue_list[queueid]; |
203 | if (q) | |
204 | snd_use_lock_use(&q->use_lock); | |
1da177e4 LT |
205 | return q; |
206 | } | |
207 | ||
208 | /* return the (first) queue matching with the specified name */ | |
c7e0b5bf | 209 | struct snd_seq_queue *snd_seq_queue_find_name(char *name) |
1da177e4 LT |
210 | { |
211 | int i; | |
c7e0b5bf | 212 | struct snd_seq_queue *q; |
1da177e4 LT |
213 | |
214 | for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) { | |
f9a6bb84 TI |
215 | q = queueptr(i); |
216 | if (q) { | |
1da177e4 LT |
217 | if (strncmp(q->name, name, sizeof(q->name)) == 0) |
218 | return q; | |
219 | queuefree(q); | |
220 | } | |
221 | } | |
222 | return NULL; | |
223 | } | |
224 | ||
225 | ||
226 | /* -------------------------------------------------------- */ | |
227 | ||
6fadb494 TI |
228 | #define MAX_CELL_PROCESSES_IN_QUEUE 1000 |
229 | ||
c7e0b5bf | 230 | void snd_seq_check_queue(struct snd_seq_queue *q, int atomic, int hop) |
1da177e4 | 231 | { |
c7e0b5bf | 232 | struct snd_seq_event_cell *cell; |
dc749779 TI |
233 | snd_seq_tick_time_t cur_tick; |
234 | snd_seq_real_time_t cur_time; | |
6fadb494 | 235 | int processed = 0; |
1da177e4 LT |
236 | |
237 | if (q == NULL) | |
238 | return; | |
239 | ||
240 | /* make this function non-reentrant */ | |
7c2e9821 TI |
241 | scoped_guard(spinlock_irqsave, &q->check_lock) { |
242 | if (q->check_blocked) { | |
243 | q->check_again = 1; | |
244 | return; /* other thread is already checking queues */ | |
245 | } | |
246 | q->check_blocked = 1; | |
1da177e4 | 247 | } |
1da177e4 LT |
248 | |
249 | __again: | |
250 | /* Process tick queue... */ | |
dc749779 | 251 | cur_tick = snd_seq_timer_get_cur_tick(q->timer); |
d0f83306 | 252 | for (;;) { |
dc749779 | 253 | cell = snd_seq_prioq_cell_out(q->tickq, &cur_tick); |
d0f83306 | 254 | if (!cell) |
1da177e4 | 255 | break; |
d0f83306 | 256 | snd_seq_dispatch_event(cell, atomic, hop); |
6fadb494 TI |
257 | if (++processed >= MAX_CELL_PROCESSES_IN_QUEUE) |
258 | goto out; /* the rest processed at the next batch */ | |
1da177e4 LT |
259 | } |
260 | ||
1da177e4 | 261 | /* Process time queue... */ |
dc749779 | 262 | cur_time = snd_seq_timer_get_cur_time(q->timer, false); |
d0f83306 | 263 | for (;;) { |
dc749779 | 264 | cell = snd_seq_prioq_cell_out(q->timeq, &cur_time); |
d0f83306 | 265 | if (!cell) |
1da177e4 | 266 | break; |
d0f83306 | 267 | snd_seq_dispatch_event(cell, atomic, hop); |
6fadb494 TI |
268 | if (++processed >= MAX_CELL_PROCESSES_IN_QUEUE) |
269 | goto out; /* the rest processed at the next batch */ | |
1da177e4 LT |
270 | } |
271 | ||
6fadb494 | 272 | out: |
1da177e4 | 273 | /* free lock */ |
7c2e9821 TI |
274 | scoped_guard(spinlock_irqsave, &q->check_lock) { |
275 | if (q->check_again) { | |
276 | q->check_again = 0; | |
277 | if (processed < MAX_CELL_PROCESSES_IN_QUEUE) | |
278 | goto __again; | |
6fadb494 | 279 | } |
7c2e9821 | 280 | q->check_blocked = 0; |
1da177e4 | 281 | } |
1da177e4 LT |
282 | } |
283 | ||
284 | ||
285 | /* enqueue a event to singe queue */ | |
c7e0b5bf | 286 | int snd_seq_enqueue_event(struct snd_seq_event_cell *cell, int atomic, int hop) |
1da177e4 LT |
287 | { |
288 | int dest, err; | |
c7e0b5bf | 289 | struct snd_seq_queue *q; |
1da177e4 | 290 | |
7eaa943c TI |
291 | if (snd_BUG_ON(!cell)) |
292 | return -EINVAL; | |
1da177e4 LT |
293 | dest = cell->event.queue; /* destination queue */ |
294 | q = queueptr(dest); | |
295 | if (q == NULL) | |
296 | return -EINVAL; | |
297 | /* handle relative time stamps, convert them into absolute */ | |
298 | if ((cell->event.flags & SNDRV_SEQ_TIME_MODE_MASK) == SNDRV_SEQ_TIME_MODE_REL) { | |
299 | switch (cell->event.flags & SNDRV_SEQ_TIME_STAMP_MASK) { | |
300 | case SNDRV_SEQ_TIME_STAMP_TICK: | |
301 | cell->event.time.tick += q->timer->tick.cur_tick; | |
302 | break; | |
303 | ||
304 | case SNDRV_SEQ_TIME_STAMP_REAL: | |
c7e0b5bf TI |
305 | snd_seq_inc_real_time(&cell->event.time.time, |
306 | &q->timer->cur_time); | |
1da177e4 LT |
307 | break; |
308 | } | |
309 | cell->event.flags &= ~SNDRV_SEQ_TIME_MODE_MASK; | |
310 | cell->event.flags |= SNDRV_SEQ_TIME_MODE_ABS; | |
311 | } | |
312 | /* enqueue event in the real-time or midi queue */ | |
313 | switch (cell->event.flags & SNDRV_SEQ_TIME_STAMP_MASK) { | |
314 | case SNDRV_SEQ_TIME_STAMP_TICK: | |
315 | err = snd_seq_prioq_cell_in(q->tickq, cell); | |
316 | break; | |
317 | ||
318 | case SNDRV_SEQ_TIME_STAMP_REAL: | |
319 | default: | |
320 | err = snd_seq_prioq_cell_in(q->timeq, cell); | |
321 | break; | |
322 | } | |
323 | ||
324 | if (err < 0) { | |
325 | queuefree(q); /* unlock */ | |
326 | return err; | |
327 | } | |
328 | ||
329 | /* trigger dispatching */ | |
330 | snd_seq_check_queue(q, atomic, hop); | |
331 | ||
332 | queuefree(q); /* unlock */ | |
333 | ||
334 | return 0; | |
335 | } | |
336 | ||
337 | ||
338 | /*----------------------------------------------------------------*/ | |
339 | ||
c7e0b5bf | 340 | static inline int check_access(struct snd_seq_queue *q, int client) |
1da177e4 LT |
341 | { |
342 | return (q->owner == client) || (!q->locked && !q->klocked); | |
343 | } | |
344 | ||
345 | /* check if the client has permission to modify queue parameters. | |
346 | * if it does, lock the queue | |
347 | */ | |
c7e0b5bf | 348 | static int queue_access_lock(struct snd_seq_queue *q, int client) |
1da177e4 | 349 | { |
1da177e4 LT |
350 | int access_ok; |
351 | ||
7c2e9821 | 352 | guard(spinlock_irqsave)(&q->owner_lock); |
1da177e4 LT |
353 | access_ok = check_access(q, client); |
354 | if (access_ok) | |
355 | q->klocked = 1; | |
1da177e4 LT |
356 | return access_ok; |
357 | } | |
358 | ||
359 | /* unlock the queue */ | |
c7e0b5bf | 360 | static inline void queue_access_unlock(struct snd_seq_queue *q) |
1da177e4 | 361 | { |
7c2e9821 | 362 | guard(spinlock_irqsave)(&q->owner_lock); |
1da177e4 | 363 | q->klocked = 0; |
1da177e4 LT |
364 | } |
365 | ||
366 | /* exported - only checking permission */ | |
367 | int snd_seq_queue_check_access(int queueid, int client) | |
368 | { | |
c7e0b5bf | 369 | struct snd_seq_queue *q = queueptr(queueid); |
1da177e4 | 370 | int access_ok; |
1da177e4 LT |
371 | |
372 | if (! q) | |
373 | return 0; | |
7c2e9821 TI |
374 | scoped_guard(spinlock_irqsave, &q->owner_lock) |
375 | access_ok = check_access(q, client); | |
1da177e4 LT |
376 | queuefree(q); |
377 | return access_ok; | |
378 | } | |
379 | ||
380 | /*----------------------------------------------------------------*/ | |
381 | ||
382 | /* | |
383 | * change queue's owner and permission | |
384 | */ | |
385 | int snd_seq_queue_set_owner(int queueid, int client, int locked) | |
386 | { | |
c7e0b5bf | 387 | struct snd_seq_queue *q = queueptr(queueid); |
1da177e4 LT |
388 | |
389 | if (q == NULL) | |
390 | return -EINVAL; | |
391 | ||
392 | if (! queue_access_lock(q, client)) { | |
393 | queuefree(q); | |
394 | return -EPERM; | |
395 | } | |
396 | ||
7c2e9821 TI |
397 | scoped_guard(spinlock_irqsave, &q->owner_lock) { |
398 | q->locked = locked ? 1 : 0; | |
399 | q->owner = client; | |
400 | } | |
1da177e4 LT |
401 | queue_access_unlock(q); |
402 | queuefree(q); | |
403 | ||
404 | return 0; | |
405 | } | |
406 | ||
407 | ||
408 | /*----------------------------------------------------------------*/ | |
409 | ||
410 | /* open timer - | |
411 | * q->use mutex should be down before calling this function to avoid | |
412 | * confliction with snd_seq_queue_use() | |
413 | */ | |
414 | int snd_seq_queue_timer_open(int queueid) | |
415 | { | |
416 | int result = 0; | |
c7e0b5bf TI |
417 | struct snd_seq_queue *queue; |
418 | struct snd_seq_timer *tmr; | |
1da177e4 LT |
419 | |
420 | queue = queueptr(queueid); | |
421 | if (queue == NULL) | |
422 | return -EINVAL; | |
423 | tmr = queue->timer; | |
f9a6bb84 TI |
424 | result = snd_seq_timer_open(queue); |
425 | if (result < 0) { | |
1da177e4 LT |
426 | snd_seq_timer_defaults(tmr); |
427 | result = snd_seq_timer_open(queue); | |
428 | } | |
429 | queuefree(queue); | |
430 | return result; | |
431 | } | |
432 | ||
433 | /* close timer - | |
434 | * q->use mutex should be down before calling this function | |
435 | */ | |
436 | int snd_seq_queue_timer_close(int queueid) | |
437 | { | |
c7e0b5bf | 438 | struct snd_seq_queue *queue; |
1da177e4 LT |
439 | int result = 0; |
440 | ||
441 | queue = queueptr(queueid); | |
442 | if (queue == NULL) | |
443 | return -EINVAL; | |
1da177e4 LT |
444 | snd_seq_timer_close(queue); |
445 | queuefree(queue); | |
446 | return result; | |
447 | } | |
448 | ||
449 | /* change queue tempo and ppq */ | |
c7e0b5bf TI |
450 | int snd_seq_queue_timer_set_tempo(int queueid, int client, |
451 | struct snd_seq_queue_tempo *info) | |
1da177e4 | 452 | { |
c7e0b5bf | 453 | struct snd_seq_queue *q = queueptr(queueid); |
1da177e4 LT |
454 | int result; |
455 | ||
456 | if (q == NULL) | |
457 | return -EINVAL; | |
458 | if (! queue_access_lock(q, client)) { | |
459 | queuefree(q); | |
460 | return -EPERM; | |
461 | } | |
462 | ||
671ec859 | 463 | result = snd_seq_timer_set_tempo_ppq(q->timer, info->tempo, info->ppq); |
1da177e4 | 464 | if (result >= 0 && info->skew_base > 0) |
c7e0b5bf TI |
465 | result = snd_seq_timer_set_skew(q->timer, info->skew_value, |
466 | info->skew_base); | |
1da177e4 LT |
467 | queue_access_unlock(q); |
468 | queuefree(q); | |
469 | return result; | |
470 | } | |
471 | ||
4842e98f TI |
472 | /* use or unuse this queue */ |
473 | static void queue_use(struct snd_seq_queue *queue, int client, int use) | |
1da177e4 | 474 | { |
1da177e4 LT |
475 | if (use) { |
476 | if (!test_and_set_bit(client, queue->clients_bitmap)) | |
477 | queue->clients++; | |
478 | } else { | |
479 | if (test_and_clear_bit(client, queue->clients_bitmap)) | |
480 | queue->clients--; | |
481 | } | |
482 | if (queue->clients) { | |
483 | if (use && queue->clients == 1) | |
484 | snd_seq_timer_defaults(queue->timer); | |
485 | snd_seq_timer_open(queue); | |
486 | } else { | |
487 | snd_seq_timer_close(queue); | |
488 | } | |
4842e98f TI |
489 | } |
490 | ||
491 | /* use or unuse this queue - | |
492 | * if it is the first client, starts the timer. | |
493 | * if it is not longer used by any clients, stop the timer. | |
494 | */ | |
495 | int snd_seq_queue_use(int queueid, int client, int use) | |
496 | { | |
497 | struct snd_seq_queue *queue; | |
498 | ||
499 | queue = queueptr(queueid); | |
500 | if (queue == NULL) | |
501 | return -EINVAL; | |
502 | mutex_lock(&queue->timer_mutex); | |
503 | queue_use(queue, client, use); | |
1a60d4c5 | 504 | mutex_unlock(&queue->timer_mutex); |
1da177e4 LT |
505 | queuefree(queue); |
506 | return 0; | |
507 | } | |
508 | ||
509 | /* | |
510 | * check if queue is used by the client | |
511 | * return negative value if the queue is invalid. | |
512 | * return 0 if not used, 1 if used. | |
513 | */ | |
514 | int snd_seq_queue_is_used(int queueid, int client) | |
515 | { | |
c7e0b5bf | 516 | struct snd_seq_queue *q; |
1da177e4 LT |
517 | int result; |
518 | ||
519 | q = queueptr(queueid); | |
520 | if (q == NULL) | |
521 | return -EINVAL; /* invalid queue */ | |
522 | result = test_bit(client, q->clients_bitmap) ? 1 : 0; | |
523 | queuefree(q); | |
524 | return result; | |
525 | } | |
526 | ||
527 | ||
528 | /*----------------------------------------------------------------*/ | |
529 | ||
1da177e4 LT |
530 | /* final stage notification - |
531 | * remove cells for no longer exist client (for non-owned queue) | |
532 | * or delete this queue (for owned queue) | |
533 | */ | |
534 | void snd_seq_queue_client_leave(int client) | |
535 | { | |
536 | int i; | |
c7e0b5bf | 537 | struct snd_seq_queue *q; |
1da177e4 LT |
538 | |
539 | /* delete own queues from queue list */ | |
540 | for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) { | |
f9a6bb84 TI |
541 | q = queue_list_remove(i, client); |
542 | if (q) | |
1da177e4 LT |
543 | queue_delete(q); |
544 | } | |
545 | ||
546 | /* remove cells from existing queues - | |
547 | * they are not owned by this client | |
548 | */ | |
549 | for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) { | |
f9a6bb84 TI |
550 | q = queueptr(i); |
551 | if (!q) | |
1da177e4 LT |
552 | continue; |
553 | if (test_bit(client, q->clients_bitmap)) { | |
554 | snd_seq_prioq_leave(q->tickq, client, 0); | |
555 | snd_seq_prioq_leave(q->timeq, client, 0); | |
556 | snd_seq_queue_use(q->queue, client, 0); | |
557 | } | |
558 | queuefree(q); | |
559 | } | |
560 | } | |
561 | ||
562 | ||
563 | ||
564 | /*----------------------------------------------------------------*/ | |
565 | ||
566 | /* remove cells from all queues */ | |
567 | void snd_seq_queue_client_leave_cells(int client) | |
568 | { | |
569 | int i; | |
c7e0b5bf | 570 | struct snd_seq_queue *q; |
1da177e4 LT |
571 | |
572 | for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) { | |
f9a6bb84 TI |
573 | q = queueptr(i); |
574 | if (!q) | |
1da177e4 LT |
575 | continue; |
576 | snd_seq_prioq_leave(q->tickq, client, 0); | |
577 | snd_seq_prioq_leave(q->timeq, client, 0); | |
578 | queuefree(q); | |
579 | } | |
580 | } | |
581 | ||
582 | /* remove cells based on flush criteria */ | |
c7e0b5bf | 583 | void snd_seq_queue_remove_cells(int client, struct snd_seq_remove_events *info) |
1da177e4 LT |
584 | { |
585 | int i; | |
c7e0b5bf | 586 | struct snd_seq_queue *q; |
1da177e4 LT |
587 | |
588 | for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) { | |
f9a6bb84 TI |
589 | q = queueptr(i); |
590 | if (!q) | |
1da177e4 LT |
591 | continue; |
592 | if (test_bit(client, q->clients_bitmap) && | |
593 | (! (info->remove_mode & SNDRV_SEQ_REMOVE_DEST) || | |
594 | q->queue == info->queue)) { | |
595 | snd_seq_prioq_remove_events(q->tickq, client, info); | |
596 | snd_seq_prioq_remove_events(q->timeq, client, info); | |
597 | } | |
598 | queuefree(q); | |
599 | } | |
600 | } | |
601 | ||
602 | /*----------------------------------------------------------------*/ | |
603 | ||
604 | /* | |
605 | * send events to all subscribed ports | |
606 | */ | |
c7e0b5bf TI |
607 | static void queue_broadcast_event(struct snd_seq_queue *q, struct snd_seq_event *ev, |
608 | int atomic, int hop) | |
1da177e4 | 609 | { |
c7e0b5bf | 610 | struct snd_seq_event sev; |
1da177e4 LT |
611 | |
612 | sev = *ev; | |
613 | ||
614 | sev.flags = SNDRV_SEQ_TIME_STAMP_TICK|SNDRV_SEQ_TIME_MODE_ABS; | |
615 | sev.time.tick = q->timer->tick.cur_tick; | |
616 | sev.queue = q->queue; | |
617 | sev.data.queue.queue = q->queue; | |
618 | ||
619 | /* broadcast events from Timer port */ | |
620 | sev.source.client = SNDRV_SEQ_CLIENT_SYSTEM; | |
621 | sev.source.port = SNDRV_SEQ_PORT_SYSTEM_TIMER; | |
622 | sev.dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS; | |
623 | snd_seq_kernel_client_dispatch(SNDRV_SEQ_CLIENT_SYSTEM, &sev, atomic, hop); | |
624 | } | |
625 | ||
626 | /* | |
627 | * process a received queue-control event. | |
628 | * this function is exported for seq_sync.c. | |
629 | */ | |
c7e0b5bf TI |
630 | static void snd_seq_queue_process_event(struct snd_seq_queue *q, |
631 | struct snd_seq_event *ev, | |
123992f7 | 632 | int atomic, int hop) |
1da177e4 LT |
633 | { |
634 | switch (ev->type) { | |
635 | case SNDRV_SEQ_EVENT_START: | |
636 | snd_seq_prioq_leave(q->tickq, ev->source.client, 1); | |
637 | snd_seq_prioq_leave(q->timeq, ev->source.client, 1); | |
638 | if (! snd_seq_timer_start(q->timer)) | |
639 | queue_broadcast_event(q, ev, atomic, hop); | |
640 | break; | |
641 | ||
642 | case SNDRV_SEQ_EVENT_CONTINUE: | |
643 | if (! snd_seq_timer_continue(q->timer)) | |
644 | queue_broadcast_event(q, ev, atomic, hop); | |
645 | break; | |
646 | ||
647 | case SNDRV_SEQ_EVENT_STOP: | |
648 | snd_seq_timer_stop(q->timer); | |
649 | queue_broadcast_event(q, ev, atomic, hop); | |
650 | break; | |
651 | ||
652 | case SNDRV_SEQ_EVENT_TEMPO: | |
653 | snd_seq_timer_set_tempo(q->timer, ev->data.queue.param.value); | |
654 | queue_broadcast_event(q, ev, atomic, hop); | |
655 | break; | |
656 | ||
657 | case SNDRV_SEQ_EVENT_SETPOS_TICK: | |
658 | if (snd_seq_timer_set_position_tick(q->timer, ev->data.queue.param.time.tick) == 0) { | |
659 | queue_broadcast_event(q, ev, atomic, hop); | |
660 | } | |
661 | break; | |
662 | ||
663 | case SNDRV_SEQ_EVENT_SETPOS_TIME: | |
664 | if (snd_seq_timer_set_position_time(q->timer, ev->data.queue.param.time.time) == 0) { | |
665 | queue_broadcast_event(q, ev, atomic, hop); | |
666 | } | |
667 | break; | |
668 | case SNDRV_SEQ_EVENT_QUEUE_SKEW: | |
669 | if (snd_seq_timer_set_skew(q->timer, | |
670 | ev->data.queue.param.skew.value, | |
671 | ev->data.queue.param.skew.base) == 0) { | |
672 | queue_broadcast_event(q, ev, atomic, hop); | |
673 | } | |
674 | break; | |
675 | } | |
676 | } | |
677 | ||
678 | ||
679 | /* | |
680 | * Queue control via timer control port: | |
681 | * this function is exported as a callback of timer port. | |
682 | */ | |
c7e0b5bf | 683 | int snd_seq_control_queue(struct snd_seq_event *ev, int atomic, int hop) |
1da177e4 | 684 | { |
c7e0b5bf | 685 | struct snd_seq_queue *q; |
1da177e4 | 686 | |
7eaa943c TI |
687 | if (snd_BUG_ON(!ev)) |
688 | return -EINVAL; | |
1da177e4 LT |
689 | q = queueptr(ev->data.queue.queue); |
690 | ||
691 | if (q == NULL) | |
692 | return -EINVAL; | |
693 | ||
694 | if (! queue_access_lock(q, ev->source.client)) { | |
695 | queuefree(q); | |
696 | return -EPERM; | |
697 | } | |
698 | ||
699 | snd_seq_queue_process_event(q, ev, atomic, hop); | |
700 | ||
701 | queue_access_unlock(q); | |
702 | queuefree(q); | |
703 | return 0; | |
704 | } | |
705 | ||
706 | ||
707 | /*----------------------------------------------------------------*/ | |
708 | ||
cd6a6503 | 709 | #ifdef CONFIG_SND_PROC_FS |
1da177e4 | 710 | /* exported to seq_info.c */ |
c7e0b5bf TI |
711 | void snd_seq_info_queues_read(struct snd_info_entry *entry, |
712 | struct snd_info_buffer *buffer) | |
1da177e4 LT |
713 | { |
714 | int i, bpm; | |
c7e0b5bf TI |
715 | struct snd_seq_queue *q; |
716 | struct snd_seq_timer *tmr; | |
bb51e669 TI |
717 | bool locked; |
718 | int owner; | |
1da177e4 LT |
719 | |
720 | for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) { | |
f9a6bb84 TI |
721 | q = queueptr(i); |
722 | if (!q) | |
1da177e4 LT |
723 | continue; |
724 | ||
725 | tmr = q->timer; | |
726 | if (tmr->tempo) | |
727 | bpm = 60000000 / tmr->tempo; | |
728 | else | |
729 | bpm = 0; | |
730 | ||
7c2e9821 TI |
731 | scoped_guard(spinlock_irq, &q->owner_lock) { |
732 | locked = q->locked; | |
733 | owner = q->owner; | |
734 | } | |
bb51e669 | 735 | |
1da177e4 | 736 | snd_iprintf(buffer, "queue %d: [%s]\n", q->queue, q->name); |
bb51e669 TI |
737 | snd_iprintf(buffer, "owned by client : %d\n", owner); |
738 | snd_iprintf(buffer, "lock status : %s\n", locked ? "Locked" : "Free"); | |
1da177e4 LT |
739 | snd_iprintf(buffer, "queued time events : %d\n", snd_seq_prioq_avail(q->timeq)); |
740 | snd_iprintf(buffer, "queued tick events : %d\n", snd_seq_prioq_avail(q->tickq)); | |
741 | snd_iprintf(buffer, "timer state : %s\n", tmr->running ? "Running" : "Stopped"); | |
742 | snd_iprintf(buffer, "timer PPQ : %d\n", tmr->ppq); | |
743 | snd_iprintf(buffer, "current tempo : %d\n", tmr->tempo); | |
744 | snd_iprintf(buffer, "current BPM : %d\n", bpm); | |
745 | snd_iprintf(buffer, "current time : %d.%09d s\n", tmr->cur_time.tv_sec, tmr->cur_time.tv_nsec); | |
746 | snd_iprintf(buffer, "current tick : %d\n", tmr->tick.cur_tick); | |
747 | snd_iprintf(buffer, "\n"); | |
748 | queuefree(q); | |
749 | } | |
750 | } | |
cd6a6503 | 751 | #endif /* CONFIG_SND_PROC_FS */ |
04f141a8 | 752 |