Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * ALSA sequencer Timing queue handling |
| 3 | * Copyright (c) 1998-1999 by Frank van de Pol <fvdpol@coil.demon.nl> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | * |
| 19 | * MAJOR CHANGES |
| 20 | * Nov. 13, 1999 Takashi Iwai <iwai@ww.uni-erlangen.de> |
| 21 | * - Queues are allocated dynamically via ioctl. |
| 22 | * - When owner client is deleted, all owned queues are deleted, too. |
| 23 | * - Owner of unlocked queue is kept unmodified even if it is |
| 24 | * manipulated by other clients. |
| 25 | * - Owner field in SET_QUEUE_OWNER ioctl must be identical with the |
| 26 | * caller client. i.e. Changing owner to a third client is not |
| 27 | * allowed. |
| 28 | * |
| 29 | * Aug. 30, 2000 Takashi Iwai |
| 30 | * - Queues are managed in static array again, but with better way. |
| 31 | * The API itself is identical. |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 32 | * - The queue is locked when struct snd_seq_queue pointer is returned via |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | * queueptr(). This pointer *MUST* be released afterward by |
| 34 | * queuefree(ptr). |
| 35 | * - Addition of experimental sync support. |
| 36 | */ |
| 37 | |
| 38 | #include <sound/driver.h> |
| 39 | #include <linux/init.h> |
| 40 | #include <linux/slab.h> |
| 41 | #include <sound/core.h> |
| 42 | |
| 43 | #include "seq_memory.h" |
| 44 | #include "seq_queue.h" |
| 45 | #include "seq_clientmgr.h" |
| 46 | #include "seq_fifo.h" |
| 47 | #include "seq_timer.h" |
| 48 | #include "seq_info.h" |
| 49 | |
| 50 | /* list of allocated queues */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 51 | static struct snd_seq_queue *queue_list[SNDRV_SEQ_MAX_QUEUES]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | static DEFINE_SPINLOCK(queue_list_lock); |
| 53 | /* number of queues allocated */ |
| 54 | static int num_queues; |
| 55 | |
| 56 | int snd_seq_queue_get_cur_queues(void) |
| 57 | { |
| 58 | return num_queues; |
| 59 | } |
| 60 | |
| 61 | /*----------------------------------------------------------------*/ |
| 62 | |
| 63 | /* assign queue id and insert to list */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 64 | static int queue_list_add(struct snd_seq_queue *q) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | { |
| 66 | int i; |
| 67 | unsigned long flags; |
| 68 | |
| 69 | spin_lock_irqsave(&queue_list_lock, flags); |
| 70 | for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) { |
| 71 | if (! queue_list[i]) { |
| 72 | queue_list[i] = q; |
| 73 | q->queue = i; |
| 74 | num_queues++; |
| 75 | spin_unlock_irqrestore(&queue_list_lock, flags); |
| 76 | return i; |
| 77 | } |
| 78 | } |
| 79 | spin_unlock_irqrestore(&queue_list_lock, flags); |
| 80 | return -1; |
| 81 | } |
| 82 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 83 | static struct snd_seq_queue *queue_list_remove(int id, int client) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 85 | struct snd_seq_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | unsigned long flags; |
| 87 | |
| 88 | spin_lock_irqsave(&queue_list_lock, flags); |
| 89 | q = queue_list[id]; |
| 90 | if (q) { |
| 91 | spin_lock(&q->owner_lock); |
| 92 | if (q->owner == client) { |
| 93 | /* found */ |
| 94 | q->klocked = 1; |
| 95 | spin_unlock(&q->owner_lock); |
| 96 | queue_list[id] = NULL; |
| 97 | num_queues--; |
| 98 | spin_unlock_irqrestore(&queue_list_lock, flags); |
| 99 | return q; |
| 100 | } |
| 101 | spin_unlock(&q->owner_lock); |
| 102 | } |
| 103 | spin_unlock_irqrestore(&queue_list_lock, flags); |
| 104 | return NULL; |
| 105 | } |
| 106 | |
| 107 | /*----------------------------------------------------------------*/ |
| 108 | |
| 109 | /* create new queue (constructor) */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 110 | static struct snd_seq_queue *queue_new(int owner, int locked) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 112 | struct snd_seq_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | |
Takashi Iwai | ecca82b | 2005-09-09 14:20:49 +0200 | [diff] [blame] | 114 | q = kzalloc(sizeof(*q), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | if (q == NULL) { |
| 116 | snd_printd("malloc failed for snd_seq_queue_new()\n"); |
| 117 | return NULL; |
| 118 | } |
| 119 | |
| 120 | spin_lock_init(&q->owner_lock); |
| 121 | spin_lock_init(&q->check_lock); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 122 | mutex_init(&q->timer_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | snd_use_lock_init(&q->use_lock); |
| 124 | q->queue = -1; |
| 125 | |
| 126 | q->tickq = snd_seq_prioq_new(); |
| 127 | q->timeq = snd_seq_prioq_new(); |
| 128 | q->timer = snd_seq_timer_new(); |
| 129 | if (q->tickq == NULL || q->timeq == NULL || q->timer == NULL) { |
| 130 | snd_seq_prioq_delete(&q->tickq); |
| 131 | snd_seq_prioq_delete(&q->timeq); |
| 132 | snd_seq_timer_delete(&q->timer); |
| 133 | kfree(q); |
| 134 | return NULL; |
| 135 | } |
| 136 | |
| 137 | q->owner = owner; |
| 138 | q->locked = locked; |
| 139 | q->klocked = 0; |
| 140 | |
| 141 | return q; |
| 142 | } |
| 143 | |
| 144 | /* delete queue (destructor) */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 145 | static void queue_delete(struct snd_seq_queue *q) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | { |
| 147 | /* stop and release the timer */ |
| 148 | snd_seq_timer_stop(q->timer); |
| 149 | snd_seq_timer_close(q); |
| 150 | /* wait until access free */ |
| 151 | snd_use_lock_sync(&q->use_lock); |
| 152 | /* release resources... */ |
| 153 | snd_seq_prioq_delete(&q->tickq); |
| 154 | snd_seq_prioq_delete(&q->timeq); |
| 155 | snd_seq_timer_delete(&q->timer); |
| 156 | |
| 157 | kfree(q); |
| 158 | } |
| 159 | |
| 160 | |
| 161 | /*----------------------------------------------------------------*/ |
| 162 | |
| 163 | /* setup queues */ |
| 164 | int __init snd_seq_queues_init(void) |
| 165 | { |
| 166 | /* |
| 167 | memset(queue_list, 0, sizeof(queue_list)); |
| 168 | num_queues = 0; |
| 169 | */ |
| 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | /* delete all existing queues */ |
| 174 | void __exit snd_seq_queues_delete(void) |
| 175 | { |
| 176 | int i; |
| 177 | |
| 178 | /* clear list */ |
| 179 | for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) { |
| 180 | if (queue_list[i]) |
| 181 | queue_delete(queue_list[i]); |
| 182 | } |
| 183 | } |
| 184 | |
| 185 | /* allocate a new queue - |
| 186 | * return queue index value or negative value for error |
| 187 | */ |
| 188 | int snd_seq_queue_alloc(int client, int locked, unsigned int info_flags) |
| 189 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 190 | struct snd_seq_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | |
| 192 | q = queue_new(client, locked); |
| 193 | if (q == NULL) |
| 194 | return -ENOMEM; |
| 195 | q->info_flags = info_flags; |
| 196 | if (queue_list_add(q) < 0) { |
| 197 | queue_delete(q); |
| 198 | return -ENOMEM; |
| 199 | } |
| 200 | snd_seq_queue_use(q->queue, client, 1); /* use this queue */ |
| 201 | return q->queue; |
| 202 | } |
| 203 | |
| 204 | /* delete a queue - queue must be owned by the client */ |
| 205 | int snd_seq_queue_delete(int client, int queueid) |
| 206 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 207 | struct snd_seq_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | |
| 209 | if (queueid < 0 || queueid >= SNDRV_SEQ_MAX_QUEUES) |
| 210 | return -EINVAL; |
| 211 | q = queue_list_remove(queueid, client); |
| 212 | if (q == NULL) |
| 213 | return -EINVAL; |
| 214 | queue_delete(q); |
| 215 | |
| 216 | return 0; |
| 217 | } |
| 218 | |
| 219 | |
| 220 | /* return pointer to queue structure for specified id */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 221 | struct snd_seq_queue *queueptr(int queueid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 223 | struct snd_seq_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | unsigned long flags; |
| 225 | |
| 226 | if (queueid < 0 || queueid >= SNDRV_SEQ_MAX_QUEUES) |
| 227 | return NULL; |
| 228 | spin_lock_irqsave(&queue_list_lock, flags); |
| 229 | q = queue_list[queueid]; |
| 230 | if (q) |
| 231 | snd_use_lock_use(&q->use_lock); |
| 232 | spin_unlock_irqrestore(&queue_list_lock, flags); |
| 233 | return q; |
| 234 | } |
| 235 | |
| 236 | /* return the (first) queue matching with the specified name */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 237 | struct snd_seq_queue *snd_seq_queue_find_name(char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | { |
| 239 | int i; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 240 | struct snd_seq_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | |
| 242 | for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) { |
| 243 | if ((q = queueptr(i)) != NULL) { |
| 244 | if (strncmp(q->name, name, sizeof(q->name)) == 0) |
| 245 | return q; |
| 246 | queuefree(q); |
| 247 | } |
| 248 | } |
| 249 | return NULL; |
| 250 | } |
| 251 | |
| 252 | |
| 253 | /* -------------------------------------------------------- */ |
| 254 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 255 | void snd_seq_check_queue(struct snd_seq_queue *q, int atomic, int hop) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | { |
| 257 | unsigned long flags; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 258 | struct snd_seq_event_cell *cell; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | |
| 260 | if (q == NULL) |
| 261 | return; |
| 262 | |
| 263 | /* make this function non-reentrant */ |
| 264 | spin_lock_irqsave(&q->check_lock, flags); |
| 265 | if (q->check_blocked) { |
| 266 | q->check_again = 1; |
| 267 | spin_unlock_irqrestore(&q->check_lock, flags); |
| 268 | return; /* other thread is already checking queues */ |
| 269 | } |
| 270 | q->check_blocked = 1; |
| 271 | spin_unlock_irqrestore(&q->check_lock, flags); |
| 272 | |
| 273 | __again: |
| 274 | /* Process tick queue... */ |
| 275 | while ((cell = snd_seq_prioq_cell_peek(q->tickq)) != NULL) { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 276 | if (snd_seq_compare_tick_time(&q->timer->tick.cur_tick, |
| 277 | &cell->event.time.tick)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | cell = snd_seq_prioq_cell_out(q->tickq); |
| 279 | if (cell) |
| 280 | snd_seq_dispatch_event(cell, atomic, hop); |
| 281 | } else { |
| 282 | /* event remains in the queue */ |
| 283 | break; |
| 284 | } |
| 285 | } |
| 286 | |
| 287 | |
| 288 | /* Process time queue... */ |
| 289 | while ((cell = snd_seq_prioq_cell_peek(q->timeq)) != NULL) { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 290 | if (snd_seq_compare_real_time(&q->timer->cur_time, |
| 291 | &cell->event.time.time)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | cell = snd_seq_prioq_cell_out(q->timeq); |
| 293 | if (cell) |
| 294 | snd_seq_dispatch_event(cell, atomic, hop); |
| 295 | } else { |
| 296 | /* event remains in the queue */ |
| 297 | break; |
| 298 | } |
| 299 | } |
| 300 | |
| 301 | /* free lock */ |
| 302 | spin_lock_irqsave(&q->check_lock, flags); |
| 303 | if (q->check_again) { |
| 304 | q->check_again = 0; |
| 305 | spin_unlock_irqrestore(&q->check_lock, flags); |
| 306 | goto __again; |
| 307 | } |
| 308 | q->check_blocked = 0; |
| 309 | spin_unlock_irqrestore(&q->check_lock, flags); |
| 310 | } |
| 311 | |
| 312 | |
| 313 | /* enqueue a event to singe queue */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 314 | int snd_seq_enqueue_event(struct snd_seq_event_cell *cell, int atomic, int hop) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | { |
| 316 | int dest, err; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 317 | struct snd_seq_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | |
| 319 | snd_assert(cell != NULL, return -EINVAL); |
| 320 | dest = cell->event.queue; /* destination queue */ |
| 321 | q = queueptr(dest); |
| 322 | if (q == NULL) |
| 323 | return -EINVAL; |
| 324 | /* handle relative time stamps, convert them into absolute */ |
| 325 | if ((cell->event.flags & SNDRV_SEQ_TIME_MODE_MASK) == SNDRV_SEQ_TIME_MODE_REL) { |
| 326 | switch (cell->event.flags & SNDRV_SEQ_TIME_STAMP_MASK) { |
| 327 | case SNDRV_SEQ_TIME_STAMP_TICK: |
| 328 | cell->event.time.tick += q->timer->tick.cur_tick; |
| 329 | break; |
| 330 | |
| 331 | case SNDRV_SEQ_TIME_STAMP_REAL: |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 332 | snd_seq_inc_real_time(&cell->event.time.time, |
| 333 | &q->timer->cur_time); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | break; |
| 335 | } |
| 336 | cell->event.flags &= ~SNDRV_SEQ_TIME_MODE_MASK; |
| 337 | cell->event.flags |= SNDRV_SEQ_TIME_MODE_ABS; |
| 338 | } |
| 339 | /* enqueue event in the real-time or midi queue */ |
| 340 | switch (cell->event.flags & SNDRV_SEQ_TIME_STAMP_MASK) { |
| 341 | case SNDRV_SEQ_TIME_STAMP_TICK: |
| 342 | err = snd_seq_prioq_cell_in(q->tickq, cell); |
| 343 | break; |
| 344 | |
| 345 | case SNDRV_SEQ_TIME_STAMP_REAL: |
| 346 | default: |
| 347 | err = snd_seq_prioq_cell_in(q->timeq, cell); |
| 348 | break; |
| 349 | } |
| 350 | |
| 351 | if (err < 0) { |
| 352 | queuefree(q); /* unlock */ |
| 353 | return err; |
| 354 | } |
| 355 | |
| 356 | /* trigger dispatching */ |
| 357 | snd_seq_check_queue(q, atomic, hop); |
| 358 | |
| 359 | queuefree(q); /* unlock */ |
| 360 | |
| 361 | return 0; |
| 362 | } |
| 363 | |
| 364 | |
| 365 | /*----------------------------------------------------------------*/ |
| 366 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 367 | static inline int check_access(struct snd_seq_queue *q, int client) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | { |
| 369 | return (q->owner == client) || (!q->locked && !q->klocked); |
| 370 | } |
| 371 | |
| 372 | /* check if the client has permission to modify queue parameters. |
| 373 | * if it does, lock the queue |
| 374 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 375 | static int queue_access_lock(struct snd_seq_queue *q, int client) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | { |
| 377 | unsigned long flags; |
| 378 | int access_ok; |
| 379 | |
| 380 | spin_lock_irqsave(&q->owner_lock, flags); |
| 381 | access_ok = check_access(q, client); |
| 382 | if (access_ok) |
| 383 | q->klocked = 1; |
| 384 | spin_unlock_irqrestore(&q->owner_lock, flags); |
| 385 | return access_ok; |
| 386 | } |
| 387 | |
| 388 | /* unlock the queue */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 389 | static inline void queue_access_unlock(struct snd_seq_queue *q) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | { |
| 391 | unsigned long flags; |
| 392 | |
| 393 | spin_lock_irqsave(&q->owner_lock, flags); |
| 394 | q->klocked = 0; |
| 395 | spin_unlock_irqrestore(&q->owner_lock, flags); |
| 396 | } |
| 397 | |
| 398 | /* exported - only checking permission */ |
| 399 | int snd_seq_queue_check_access(int queueid, int client) |
| 400 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 401 | struct snd_seq_queue *q = queueptr(queueid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | int access_ok; |
| 403 | unsigned long flags; |
| 404 | |
| 405 | if (! q) |
| 406 | return 0; |
| 407 | spin_lock_irqsave(&q->owner_lock, flags); |
| 408 | access_ok = check_access(q, client); |
| 409 | spin_unlock_irqrestore(&q->owner_lock, flags); |
| 410 | queuefree(q); |
| 411 | return access_ok; |
| 412 | } |
| 413 | |
| 414 | /*----------------------------------------------------------------*/ |
| 415 | |
| 416 | /* |
| 417 | * change queue's owner and permission |
| 418 | */ |
| 419 | int snd_seq_queue_set_owner(int queueid, int client, int locked) |
| 420 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 421 | struct snd_seq_queue *q = queueptr(queueid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | |
| 423 | if (q == NULL) |
| 424 | return -EINVAL; |
| 425 | |
| 426 | if (! queue_access_lock(q, client)) { |
| 427 | queuefree(q); |
| 428 | return -EPERM; |
| 429 | } |
| 430 | |
| 431 | q->locked = locked ? 1 : 0; |
| 432 | q->owner = client; |
| 433 | queue_access_unlock(q); |
| 434 | queuefree(q); |
| 435 | |
| 436 | return 0; |
| 437 | } |
| 438 | |
| 439 | |
| 440 | /*----------------------------------------------------------------*/ |
| 441 | |
| 442 | /* open timer - |
| 443 | * q->use mutex should be down before calling this function to avoid |
| 444 | * confliction with snd_seq_queue_use() |
| 445 | */ |
| 446 | int snd_seq_queue_timer_open(int queueid) |
| 447 | { |
| 448 | int result = 0; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 449 | struct snd_seq_queue *queue; |
| 450 | struct snd_seq_timer *tmr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | |
| 452 | queue = queueptr(queueid); |
| 453 | if (queue == NULL) |
| 454 | return -EINVAL; |
| 455 | tmr = queue->timer; |
| 456 | if ((result = snd_seq_timer_open(queue)) < 0) { |
| 457 | snd_seq_timer_defaults(tmr); |
| 458 | result = snd_seq_timer_open(queue); |
| 459 | } |
| 460 | queuefree(queue); |
| 461 | return result; |
| 462 | } |
| 463 | |
| 464 | /* close timer - |
| 465 | * q->use mutex should be down before calling this function |
| 466 | */ |
| 467 | int snd_seq_queue_timer_close(int queueid) |
| 468 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 469 | struct snd_seq_queue *queue; |
| 470 | struct snd_seq_timer *tmr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | int result = 0; |
| 472 | |
| 473 | queue = queueptr(queueid); |
| 474 | if (queue == NULL) |
| 475 | return -EINVAL; |
| 476 | tmr = queue->timer; |
| 477 | snd_seq_timer_close(queue); |
| 478 | queuefree(queue); |
| 479 | return result; |
| 480 | } |
| 481 | |
| 482 | /* change queue tempo and ppq */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 483 | int snd_seq_queue_timer_set_tempo(int queueid, int client, |
| 484 | struct snd_seq_queue_tempo *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 486 | struct snd_seq_queue *q = queueptr(queueid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | int result; |
| 488 | |
| 489 | if (q == NULL) |
| 490 | return -EINVAL; |
| 491 | if (! queue_access_lock(q, client)) { |
| 492 | queuefree(q); |
| 493 | return -EPERM; |
| 494 | } |
| 495 | |
| 496 | result = snd_seq_timer_set_tempo(q->timer, info->tempo); |
| 497 | if (result >= 0) |
| 498 | result = snd_seq_timer_set_ppq(q->timer, info->ppq); |
| 499 | if (result >= 0 && info->skew_base > 0) |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 500 | result = snd_seq_timer_set_skew(q->timer, info->skew_value, |
| 501 | info->skew_base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | queue_access_unlock(q); |
| 503 | queuefree(q); |
| 504 | return result; |
| 505 | } |
| 506 | |
| 507 | |
| 508 | /* use or unuse this queue - |
| 509 | * if it is the first client, starts the timer. |
| 510 | * if it is not longer used by any clients, stop the timer. |
| 511 | */ |
| 512 | int snd_seq_queue_use(int queueid, int client, int use) |
| 513 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 514 | struct snd_seq_queue *queue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | |
| 516 | queue = queueptr(queueid); |
| 517 | if (queue == NULL) |
| 518 | return -EINVAL; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 519 | mutex_lock(&queue->timer_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | if (use) { |
| 521 | if (!test_and_set_bit(client, queue->clients_bitmap)) |
| 522 | queue->clients++; |
| 523 | } else { |
| 524 | if (test_and_clear_bit(client, queue->clients_bitmap)) |
| 525 | queue->clients--; |
| 526 | } |
| 527 | if (queue->clients) { |
| 528 | if (use && queue->clients == 1) |
| 529 | snd_seq_timer_defaults(queue->timer); |
| 530 | snd_seq_timer_open(queue); |
| 531 | } else { |
| 532 | snd_seq_timer_close(queue); |
| 533 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 534 | mutex_unlock(&queue->timer_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | queuefree(queue); |
| 536 | return 0; |
| 537 | } |
| 538 | |
| 539 | /* |
| 540 | * check if queue is used by the client |
| 541 | * return negative value if the queue is invalid. |
| 542 | * return 0 if not used, 1 if used. |
| 543 | */ |
| 544 | int snd_seq_queue_is_used(int queueid, int client) |
| 545 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 546 | struct snd_seq_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | int result; |
| 548 | |
| 549 | q = queueptr(queueid); |
| 550 | if (q == NULL) |
| 551 | return -EINVAL; /* invalid queue */ |
| 552 | result = test_bit(client, q->clients_bitmap) ? 1 : 0; |
| 553 | queuefree(q); |
| 554 | return result; |
| 555 | } |
| 556 | |
| 557 | |
| 558 | /*----------------------------------------------------------------*/ |
| 559 | |
| 560 | /* notification that client has left the system - |
| 561 | * stop the timer on all queues owned by this client |
| 562 | */ |
| 563 | void snd_seq_queue_client_termination(int client) |
| 564 | { |
| 565 | unsigned long flags; |
| 566 | int i; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 567 | struct snd_seq_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | |
| 569 | for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) { |
| 570 | if ((q = queueptr(i)) == NULL) |
| 571 | continue; |
| 572 | spin_lock_irqsave(&q->owner_lock, flags); |
| 573 | if (q->owner == client) |
| 574 | q->klocked = 1; |
| 575 | spin_unlock_irqrestore(&q->owner_lock, flags); |
| 576 | if (q->owner == client) { |
| 577 | if (q->timer->running) |
| 578 | snd_seq_timer_stop(q->timer); |
| 579 | snd_seq_timer_reset(q->timer); |
| 580 | } |
| 581 | queuefree(q); |
| 582 | } |
| 583 | } |
| 584 | |
| 585 | /* final stage notification - |
| 586 | * remove cells for no longer exist client (for non-owned queue) |
| 587 | * or delete this queue (for owned queue) |
| 588 | */ |
| 589 | void snd_seq_queue_client_leave(int client) |
| 590 | { |
| 591 | int i; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 592 | struct snd_seq_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | |
| 594 | /* delete own queues from queue list */ |
| 595 | for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) { |
| 596 | if ((q = queue_list_remove(i, client)) != NULL) |
| 597 | queue_delete(q); |
| 598 | } |
| 599 | |
| 600 | /* remove cells from existing queues - |
| 601 | * they are not owned by this client |
| 602 | */ |
| 603 | for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) { |
| 604 | if ((q = queueptr(i)) == NULL) |
| 605 | continue; |
| 606 | if (test_bit(client, q->clients_bitmap)) { |
| 607 | snd_seq_prioq_leave(q->tickq, client, 0); |
| 608 | snd_seq_prioq_leave(q->timeq, client, 0); |
| 609 | snd_seq_queue_use(q->queue, client, 0); |
| 610 | } |
| 611 | queuefree(q); |
| 612 | } |
| 613 | } |
| 614 | |
| 615 | |
| 616 | |
| 617 | /*----------------------------------------------------------------*/ |
| 618 | |
| 619 | /* remove cells from all queues */ |
| 620 | void snd_seq_queue_client_leave_cells(int client) |
| 621 | { |
| 622 | int i; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 623 | struct snd_seq_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | |
| 625 | for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) { |
| 626 | if ((q = queueptr(i)) == NULL) |
| 627 | continue; |
| 628 | snd_seq_prioq_leave(q->tickq, client, 0); |
| 629 | snd_seq_prioq_leave(q->timeq, client, 0); |
| 630 | queuefree(q); |
| 631 | } |
| 632 | } |
| 633 | |
| 634 | /* remove cells based on flush criteria */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 635 | void snd_seq_queue_remove_cells(int client, struct snd_seq_remove_events *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | { |
| 637 | int i; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 638 | struct snd_seq_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | |
| 640 | for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) { |
| 641 | if ((q = queueptr(i)) == NULL) |
| 642 | continue; |
| 643 | if (test_bit(client, q->clients_bitmap) && |
| 644 | (! (info->remove_mode & SNDRV_SEQ_REMOVE_DEST) || |
| 645 | q->queue == info->queue)) { |
| 646 | snd_seq_prioq_remove_events(q->tickq, client, info); |
| 647 | snd_seq_prioq_remove_events(q->timeq, client, info); |
| 648 | } |
| 649 | queuefree(q); |
| 650 | } |
| 651 | } |
| 652 | |
| 653 | /*----------------------------------------------------------------*/ |
| 654 | |
| 655 | /* |
| 656 | * send events to all subscribed ports |
| 657 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 658 | static void queue_broadcast_event(struct snd_seq_queue *q, struct snd_seq_event *ev, |
| 659 | int atomic, int hop) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 661 | struct snd_seq_event sev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | |
| 663 | sev = *ev; |
| 664 | |
| 665 | sev.flags = SNDRV_SEQ_TIME_STAMP_TICK|SNDRV_SEQ_TIME_MODE_ABS; |
| 666 | sev.time.tick = q->timer->tick.cur_tick; |
| 667 | sev.queue = q->queue; |
| 668 | sev.data.queue.queue = q->queue; |
| 669 | |
| 670 | /* broadcast events from Timer port */ |
| 671 | sev.source.client = SNDRV_SEQ_CLIENT_SYSTEM; |
| 672 | sev.source.port = SNDRV_SEQ_PORT_SYSTEM_TIMER; |
| 673 | sev.dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS; |
| 674 | snd_seq_kernel_client_dispatch(SNDRV_SEQ_CLIENT_SYSTEM, &sev, atomic, hop); |
| 675 | } |
| 676 | |
| 677 | /* |
| 678 | * process a received queue-control event. |
| 679 | * this function is exported for seq_sync.c. |
| 680 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 681 | static void snd_seq_queue_process_event(struct snd_seq_queue *q, |
| 682 | struct snd_seq_event *ev, |
Adrian Bunk | 123992f | 2005-05-18 18:02:04 +0200 | [diff] [blame] | 683 | int atomic, int hop) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | { |
| 685 | switch (ev->type) { |
| 686 | case SNDRV_SEQ_EVENT_START: |
| 687 | snd_seq_prioq_leave(q->tickq, ev->source.client, 1); |
| 688 | snd_seq_prioq_leave(q->timeq, ev->source.client, 1); |
| 689 | if (! snd_seq_timer_start(q->timer)) |
| 690 | queue_broadcast_event(q, ev, atomic, hop); |
| 691 | break; |
| 692 | |
| 693 | case SNDRV_SEQ_EVENT_CONTINUE: |
| 694 | if (! snd_seq_timer_continue(q->timer)) |
| 695 | queue_broadcast_event(q, ev, atomic, hop); |
| 696 | break; |
| 697 | |
| 698 | case SNDRV_SEQ_EVENT_STOP: |
| 699 | snd_seq_timer_stop(q->timer); |
| 700 | queue_broadcast_event(q, ev, atomic, hop); |
| 701 | break; |
| 702 | |
| 703 | case SNDRV_SEQ_EVENT_TEMPO: |
| 704 | snd_seq_timer_set_tempo(q->timer, ev->data.queue.param.value); |
| 705 | queue_broadcast_event(q, ev, atomic, hop); |
| 706 | break; |
| 707 | |
| 708 | case SNDRV_SEQ_EVENT_SETPOS_TICK: |
| 709 | if (snd_seq_timer_set_position_tick(q->timer, ev->data.queue.param.time.tick) == 0) { |
| 710 | queue_broadcast_event(q, ev, atomic, hop); |
| 711 | } |
| 712 | break; |
| 713 | |
| 714 | case SNDRV_SEQ_EVENT_SETPOS_TIME: |
| 715 | if (snd_seq_timer_set_position_time(q->timer, ev->data.queue.param.time.time) == 0) { |
| 716 | queue_broadcast_event(q, ev, atomic, hop); |
| 717 | } |
| 718 | break; |
| 719 | case SNDRV_SEQ_EVENT_QUEUE_SKEW: |
| 720 | if (snd_seq_timer_set_skew(q->timer, |
| 721 | ev->data.queue.param.skew.value, |
| 722 | ev->data.queue.param.skew.base) == 0) { |
| 723 | queue_broadcast_event(q, ev, atomic, hop); |
| 724 | } |
| 725 | break; |
| 726 | } |
| 727 | } |
| 728 | |
| 729 | |
| 730 | /* |
| 731 | * Queue control via timer control port: |
| 732 | * this function is exported as a callback of timer port. |
| 733 | */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 734 | int snd_seq_control_queue(struct snd_seq_event *ev, int atomic, int hop) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 736 | struct snd_seq_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | |
| 738 | snd_assert(ev != NULL, return -EINVAL); |
| 739 | q = queueptr(ev->data.queue.queue); |
| 740 | |
| 741 | if (q == NULL) |
| 742 | return -EINVAL; |
| 743 | |
| 744 | if (! queue_access_lock(q, ev->source.client)) { |
| 745 | queuefree(q); |
| 746 | return -EPERM; |
| 747 | } |
| 748 | |
| 749 | snd_seq_queue_process_event(q, ev, atomic, hop); |
| 750 | |
| 751 | queue_access_unlock(q); |
| 752 | queuefree(q); |
| 753 | return 0; |
| 754 | } |
| 755 | |
| 756 | |
| 757 | /*----------------------------------------------------------------*/ |
| 758 | |
Takashi Iwai | 04f141a | 2005-12-01 10:43:51 +0100 | [diff] [blame] | 759 | #ifdef CONFIG_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | /* exported to seq_info.c */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 761 | void snd_seq_info_queues_read(struct snd_info_entry *entry, |
| 762 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | { |
| 764 | int i, bpm; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 765 | struct snd_seq_queue *q; |
| 766 | struct snd_seq_timer *tmr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | |
| 768 | for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) { |
| 769 | if ((q = queueptr(i)) == NULL) |
| 770 | continue; |
| 771 | |
| 772 | tmr = q->timer; |
| 773 | if (tmr->tempo) |
| 774 | bpm = 60000000 / tmr->tempo; |
| 775 | else |
| 776 | bpm = 0; |
| 777 | |
| 778 | snd_iprintf(buffer, "queue %d: [%s]\n", q->queue, q->name); |
| 779 | snd_iprintf(buffer, "owned by client : %d\n", q->owner); |
| 780 | snd_iprintf(buffer, "lock status : %s\n", q->locked ? "Locked" : "Free"); |
| 781 | snd_iprintf(buffer, "queued time events : %d\n", snd_seq_prioq_avail(q->timeq)); |
| 782 | snd_iprintf(buffer, "queued tick events : %d\n", snd_seq_prioq_avail(q->tickq)); |
| 783 | snd_iprintf(buffer, "timer state : %s\n", tmr->running ? "Running" : "Stopped"); |
| 784 | snd_iprintf(buffer, "timer PPQ : %d\n", tmr->ppq); |
| 785 | snd_iprintf(buffer, "current tempo : %d\n", tmr->tempo); |
| 786 | snd_iprintf(buffer, "current BPM : %d\n", bpm); |
| 787 | snd_iprintf(buffer, "current time : %d.%09d s\n", tmr->cur_time.tv_sec, tmr->cur_time.tv_nsec); |
| 788 | snd_iprintf(buffer, "current tick : %d\n", tmr->tick.cur_tick); |
| 789 | snd_iprintf(buffer, "\n"); |
| 790 | queuefree(q); |
| 791 | } |
| 792 | } |
Takashi Iwai | 04f141a | 2005-12-01 10:43:51 +0100 | [diff] [blame] | 793 | #endif /* CONFIG_PROC_FS */ |
| 794 | |