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Merge tag 'pm+acpi-4.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
[deliverable/linux.git] / sound / core / seq / seq_clientmgr.c
CommitLineData
1da177e4
LT		 1/*
2 * ALSA sequencer Client Manager
3 * Copyright (c) 1998-2001 by Frank van de Pol <fvdpol@coil.demon.nl>
c1017a4c 4 * Jaroslav Kysela <perex@perex.cz>
1da177e4
LT		 5 * Takashi Iwai <tiwai@suse.de>
6 *
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 */
23
1da177e4 24#include <linux/init.h>
d81a6d71 25#include <linux/export.h>
1da177e4
LT		 26#include <linux/slab.h>
27#include <sound/core.h>
28#include <sound/minors.h>
29#include <linux/kmod.h>
30
31#include <sound/seq_kernel.h>
32#include "seq_clientmgr.h"
33#include "seq_memory.h"
34#include "seq_queue.h"
35#include "seq_timer.h"
36#include "seq_info.h"
37#include "seq_system.h"
38#include <sound/seq_device.h>
39#ifdef CONFIG_COMPAT
40#include <linux/compat.h>
41#endif
42
43/* Client Manager
44
45 * this module handles the connections of userland and kernel clients
46 *
47 */
48
aa1e77e6
CL		 49/*
50 * There are four ranges of client numbers (last two shared):
51 * 0..15: global clients
52 * 16..127: statically allocated client numbers for cards 0..27
53 * 128..191: dynamically allocated client numbers for cards 28..31
54 * 128..191: dynamically allocated client numbers for applications
55 */
56
57/* number of kernel non-card clients */
58#define SNDRV_SEQ_GLOBAL_CLIENTS 16
59/* clients per cards, for static clients */
60#define SNDRV_SEQ_CLIENTS_PER_CARD 4
61/* dynamically allocated client numbers (both kernel drivers and user space) */
62#define SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN 128
d001544d 63
1da177e4
LT		 64#define SNDRV_SEQ_LFLG_INPUT 0x0001
65#define SNDRV_SEQ_LFLG_OUTPUT 0x0002
66#define SNDRV_SEQ_LFLG_OPEN (SNDRV_SEQ_LFLG_INPUT|SNDRV_SEQ_LFLG_OUTPUT)
67
68static DEFINE_SPINLOCK(clients_lock);
1a60d4c5 69static DEFINE_MUTEX(register_mutex);
1da177e4
LT		 70
71/*
72 * client table
73 */
74static char clienttablock[SNDRV_SEQ_MAX_CLIENTS];
c7e0b5bf
TI		 75static struct snd_seq_client *clienttab[SNDRV_SEQ_MAX_CLIENTS];
76static struct snd_seq_usage client_usage;
1da177e4
LT		 77
78/*
79 * prototypes
80 */
c7e0b5bf
TI		 81static int bounce_error_event(struct snd_seq_client *client,
82 struct snd_seq_event *event,
83 int err, int atomic, int hop);
84static int snd_seq_deliver_single_event(struct snd_seq_client *client,
85 struct snd_seq_event *event,
86 int filter, int atomic, int hop);
1da177e4
LT		 87
88/*
89 */
90
91static inline mm_segment_t snd_enter_user(void)
92{
93 mm_segment_t fs = get_fs();
94 set_fs(get_ds());
95 return fs;
96}
97
98static inline void snd_leave_user(mm_segment_t fs)
99{
100 set_fs(fs);
101}
102
103/*
104 */
105static inline unsigned short snd_seq_file_flags(struct file *file)
106{
107 switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) {
108 case FMODE_WRITE:
109 return SNDRV_SEQ_LFLG_OUTPUT;
110 case FMODE_READ:
111 return SNDRV_SEQ_LFLG_INPUT;
112 default:
113 return SNDRV_SEQ_LFLG_OPEN;
114 }
115}
116
c7e0b5bf 117static inline int snd_seq_write_pool_allocated(struct snd_seq_client *client)
1da177e4
LT		 118{
119 return snd_seq_total_cells(client->pool) > 0;
120}
121
122/* return pointer to client structure for specified id */
c7e0b5bf 123static struct snd_seq_client *clientptr(int clientid)
1da177e4
LT		 124{
125 if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) {
04cc79a0 126 pr_debug("ALSA: seq: oops. Trying to get pointer to client %d\n",
c7e0b5bf 127 clientid);
1da177e4
LT		 128 return NULL;
129 }
130 return clienttab[clientid];
131}
132
c7e0b5bf 133struct snd_seq_client *snd_seq_client_use_ptr(int clientid)
1da177e4
LT		 134{
135 unsigned long flags;
c7e0b5bf 136 struct snd_seq_client *client;
1da177e4
LT		 137
138 if (clientid < 0 || clientid >= SNDRV_SEQ_MAX_CLIENTS) {
04cc79a0 139 pr_debug("ALSA: seq: oops. Trying to get pointer to client %d\n",
c7e0b5bf 140 clientid);
1da177e4
LT		 141 return NULL;
142 }
143 spin_lock_irqsave(&clients_lock, flags);
144 client = clientptr(clientid);
145 if (client)
146 goto __lock;
147 if (clienttablock[clientid]) {
148 spin_unlock_irqrestore(&clients_lock, flags);
149 return NULL;
150 }
151 spin_unlock_irqrestore(&clients_lock, flags);
ee2da997 152#ifdef CONFIG_MODULES
0d63e4f9 153 if (!in_interrupt()) {
aa1e77e6 154 static char client_requested[SNDRV_SEQ_GLOBAL_CLIENTS];
1da177e4 155 static char card_requested[SNDRV_CARDS];
aa1e77e6 156 if (clientid < SNDRV_SEQ_GLOBAL_CLIENTS) {
1da177e4
LT		 157 int idx;
158
0d63e4f9 159 if (!client_requested[clientid]) {
1da177e4 160 client_requested[clientid] = 1;
aa1e77e6 161 for (idx = 0; idx < 15; idx++) {
1da177e4
LT		 162 if (seq_client_load[idx] < 0)
163 break;
164 if (seq_client_load[idx] == clientid) {
c7e0b5bf
TI		 165 request_module("snd-seq-client-%i",
166 clientid);
1da177e4
LT		 167 break;
168 }
169 }
170 }
aa1e77e6
CL		 171 } else if (clientid < SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN) {
172 int card = (clientid - SNDRV_SEQ_GLOBAL_CLIENTS) /
173 SNDRV_SEQ_CLIENTS_PER_CARD;
1da177e4
LT		 174 if (card < snd_ecards_limit) {
175 if (! card_requested[card]) {
176 card_requested[card] = 1;
177 snd_request_card(card);
178 }
179 snd_seq_device_load_drivers();
180 }
181 }
182 spin_lock_irqsave(&clients_lock, flags);
183 client = clientptr(clientid);
184 if (client)
185 goto __lock;
186 spin_unlock_irqrestore(&clients_lock, flags);
187 }
188#endif
189 return NULL;
190
191 __lock:
192 snd_use_lock_use(&client->use_lock);
193 spin_unlock_irqrestore(&clients_lock, flags);
194 return client;
195}
196
c7e0b5bf 197static void usage_alloc(struct snd_seq_usage *res, int num)
1da177e4
LT		 198{
199 res->cur += num;
200 if (res->cur > res->peak)
201 res->peak = res->cur;
202}
203
c7e0b5bf 204static void usage_free(struct snd_seq_usage *res, int num)
1da177e4
LT		 205{
206 res->cur -= num;
207}
208
209/* initialise data structures */
210int __init client_init_data(void)
211{
212 /* zap out the client table */
213 memset(&clienttablock, 0, sizeof(clienttablock));
214 memset(&clienttab, 0, sizeof(clienttab));
215 return 0;
216}
217
218
aa1e77e6 219static struct snd_seq_client *seq_create_client1(int client_index, int poolsize)
1da177e4
LT		 220{
221 unsigned long flags;
222 int c;
c7e0b5bf 223 struct snd_seq_client *client;
1da177e4
LT		 224
225 /* init client data */
ecca82b4 226 client = kzalloc(sizeof(*client), GFP_KERNEL);
1da177e4
LT		 227 if (client == NULL)
228 return NULL;
229 client->pool = snd_seq_pool_new(poolsize);
230 if (client->pool == NULL) {
231 kfree(client);
232 return NULL;
233 }
234 client->type = NO_CLIENT;
235 snd_use_lock_init(&client->use_lock);
236 rwlock_init(&client->ports_lock);
1a60d4c5 237 mutex_init(&client->ports_mutex);
1da177e4
LT		 238 INIT_LIST_HEAD(&client->ports_list_head);
239
240 /* find free slot in the client table */
241 spin_lock_irqsave(&clients_lock, flags);
242 if (client_index < 0) {
aa1e77e6
CL		 243 for (c = SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN;
244 c < SNDRV_SEQ_MAX_CLIENTS;
245 c++) {
1da177e4
LT		 246 if (clienttab[c] || clienttablock[c])
247 continue;
248 clienttab[client->number = c] = client;
249 spin_unlock_irqrestore(&clients_lock, flags);
250 return client;
251 }
252 } else {
253 if (clienttab[client_index] == NULL && !clienttablock[client_index]) {
254 clienttab[client->number = client_index] = client;
255 spin_unlock_irqrestore(&clients_lock, flags);
256 return client;
257 }
258 }
259 spin_unlock_irqrestore(&clients_lock, flags);
260 snd_seq_pool_delete(&client->pool);
261 kfree(client);
262 return NULL; /* no free slot found or busy, return failure code */
263}
264
265
c7e0b5bf 266static int seq_free_client1(struct snd_seq_client *client)
1da177e4
LT		 267{
268 unsigned long flags;
269
7eaa943c
TI		 270 if (!client)
271 return 0;
1da177e4
LT		 272 snd_seq_delete_all_ports(client);
273 snd_seq_queue_client_leave(client->number);
274 spin_lock_irqsave(&clients_lock, flags);
275 clienttablock[client->number] = 1;
276 clienttab[client->number] = NULL;
277 spin_unlock_irqrestore(&clients_lock, flags);
278 snd_use_lock_sync(&client->use_lock);
279 snd_seq_queue_client_termination(client->number);
280 if (client->pool)
281 snd_seq_pool_delete(&client->pool);
282 spin_lock_irqsave(&clients_lock, flags);
283 clienttablock[client->number] = 0;
284 spin_unlock_irqrestore(&clients_lock, flags);
285 return 0;
286}
287
288
c7e0b5bf 289static void seq_free_client(struct snd_seq_client * client)
1da177e4 290{
1a60d4c5 291 mutex_lock(&register_mutex);
1da177e4
LT		 292 switch (client->type) {
293 case NO_CLIENT:
04cc79a0
TI		 294 pr_warn("ALSA: seq: Trying to free unused client %d\n",
295 client->number);
1da177e4
LT		 296 break;
297 case USER_CLIENT:
298 case KERNEL_CLIENT:
299 seq_free_client1(client);
300 usage_free(&client_usage, 1);
301 break;
302
303 default:
04cc79a0 304 pr_err("ALSA: seq: Trying to free client %d with undefined type = %d\n",
c7e0b5bf 305 client->number, client->type);
1da177e4 306 }
1a60d4c5 307 mutex_unlock(&register_mutex);
1da177e4
LT		 308
309 snd_seq_system_client_ev_client_exit(client->number);
310}
311
312
313
314/* -------------------------------------------------------- */
315
316/* create a user client */
317static int snd_seq_open(struct inode *inode, struct file *file)
318{
319 int c, mode; /* client id */
c7e0b5bf
TI		 320 struct snd_seq_client *client;
321 struct snd_seq_user_client *user;
02f4865f
TI		 322 int err;
323
324 err = nonseekable_open(inode, file);
325 if (err < 0)
326 return err;
1da177e4 327
1a60d4c5 328 if (mutex_lock_interruptible(&register_mutex))
1da177e4 329 return -ERESTARTSYS;
aa1e77e6 330 client = seq_create_client1(-1, SNDRV_SEQ_DEFAULT_EVENTS);
1da177e4 331 if (client == NULL) {
1a60d4c5 332 mutex_unlock(&register_mutex);
1da177e4
LT		 333 return -ENOMEM; /* failure code */
334 }
335
336 mode = snd_seq_file_flags(file);
337 if (mode & SNDRV_SEQ_LFLG_INPUT)
338 client->accept_input = 1;
339 if (mode & SNDRV_SEQ_LFLG_OUTPUT)
340 client->accept_output = 1;
341
342 user = &client->data.user;
343 user->fifo = NULL;
344 user->fifo_pool_size = 0;
345
346 if (mode & SNDRV_SEQ_LFLG_INPUT) {
347 user->fifo_pool_size = SNDRV_SEQ_DEFAULT_CLIENT_EVENTS;
348 user->fifo = snd_seq_fifo_new(user->fifo_pool_size);
349 if (user->fifo == NULL) {
350 seq_free_client1(client);
351 kfree(client);
1a60d4c5 352 mutex_unlock(&register_mutex);
1da177e4
LT		 353 return -ENOMEM;
354 }
355 }
356
357 usage_alloc(&client_usage, 1);
358 client->type = USER_CLIENT;
1a60d4c5 359 mutex_unlock(&register_mutex);
1da177e4
LT		 360
361 c = client->number;
362 file->private_data = client;
363
364 /* fill client data */
365 user->file = file;
366 sprintf(client->name, "Client-%d", c);
367
368 /* make others aware this new client */
369 snd_seq_system_client_ev_client_start(c);
370
371 return 0;
372}
373
374/* delete a user client */
375static int snd_seq_release(struct inode *inode, struct file *file)
376{
c7e0b5bf 377 struct snd_seq_client *client = file->private_data;
1da177e4
LT		 378
379 if (client) {
380 seq_free_client(client);
381 if (client->data.user.fifo)
382 snd_seq_fifo_delete(&client->data.user.fifo);
383 kfree(client);
384 }
385
386 return 0;
387}
388
389
390/* handle client read() */
391/* possible error values:
392 * -ENXIO invalid client or file open mode
393 * -ENOSPC FIFO overflow (the flag is cleared after this error report)
394 * -EINVAL no enough user-space buffer to write the whole event
395 * -EFAULT seg. fault during copy to user space
396 */
c7e0b5bf
TI		 397static ssize_t snd_seq_read(struct file *file, char __user *buf, size_t count,
398 loff_t *offset)
1da177e4 399{
c7e0b5bf
TI		 400 struct snd_seq_client *client = file->private_data;
401 struct snd_seq_fifo *fifo;
1da177e4
LT		 402 int err;
403 long result = 0;
c7e0b5bf 404 struct snd_seq_event_cell *cell;
1da177e4
LT		 405
406 if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT))
407 return -ENXIO;
408
409 if (!access_ok(VERIFY_WRITE, buf, count))
410 return -EFAULT;
411
412 /* check client structures are in place */
7eaa943c
TI		 413 if (snd_BUG_ON(!client))
414 return -ENXIO;
1da177e4
LT		 415
416 if (!client->accept_input || (fifo = client->data.user.fifo) == NULL)
417 return -ENXIO;
418
419 if (atomic_read(&fifo->overflow) > 0) {
420 /* buffer overflow is detected */
421 snd_seq_fifo_clear(fifo);
422 /* return error code */
423 return -ENOSPC;
424 }
425
426 cell = NULL;
427 err = 0;
428 snd_seq_fifo_lock(fifo);
429
430 /* while data available in queue */
c7e0b5bf 431 while (count >= sizeof(struct snd_seq_event)) {
1da177e4
LT		 432 int nonblock;
433
434 nonblock = (file->f_flags & O_NONBLOCK) || result > 0;
435 if ((err = snd_seq_fifo_cell_out(fifo, &cell, nonblock)) < 0) {
436 break;
437 }
438 if (snd_seq_ev_is_variable(&cell->event)) {
c7e0b5bf 439 struct snd_seq_event tmpev;
1da177e4
LT		 440 tmpev = cell->event;
441 tmpev.data.ext.len &= ~SNDRV_SEQ_EXT_MASK;
c7e0b5bf 442 if (copy_to_user(buf, &tmpev, sizeof(struct snd_seq_event))) {
1da177e4
LT		 443 err = -EFAULT;
444 break;
445 }
c7e0b5bf
TI		 446 count -= sizeof(struct snd_seq_event);
447 buf += sizeof(struct snd_seq_event);
4d23359b
CL		 448 err = snd_seq_expand_var_event(&cell->event, count,
449 (char __force *)buf, 0,
c7e0b5bf 450 sizeof(struct snd_seq_event));
1da177e4
LT		 451 if (err < 0)
452 break;
453 result += err;
454 count -= err;
455 buf += err;
456 } else {
c7e0b5bf 457 if (copy_to_user(buf, &cell->event, sizeof(struct snd_seq_event))) {
1da177e4
LT		 458 err = -EFAULT;
459 break;
460 }
c7e0b5bf
TI		 461 count -= sizeof(struct snd_seq_event);
462 buf += sizeof(struct snd_seq_event);
1da177e4
LT		 463 }
464 snd_seq_cell_free(cell);
465 cell = NULL; /* to be sure */
c7e0b5bf 466 result += sizeof(struct snd_seq_event);
1da177e4
LT		 467 }
468
469 if (err < 0) {
470 if (cell)
471 snd_seq_fifo_cell_putback(fifo, cell);
472 if (err == -EAGAIN && result > 0)
473 err = 0;
474 }
475 snd_seq_fifo_unlock(fifo);
476
477 return (err < 0) ? err : result;
478}
479
480
481/*
482 * check access permission to the port
483 */
c7e0b5bf 484static int check_port_perm(struct snd_seq_client_port *port, unsigned int flags)
1da177e4
LT		 485{
486 if ((port->capability & flags) != flags)
487 return 0;
488 return flags;
489}
490
491/*
492 * check if the destination client is available, and return the pointer
493 * if filter is non-zero, client filter bitmap is tested.
494 */
c7e0b5bf
TI		 495static struct snd_seq_client *get_event_dest_client(struct snd_seq_event *event,
496 int filter)
1da177e4 497{
c7e0b5bf 498 struct snd_seq_client *dest;
1da177e4
LT		 499
500 dest = snd_seq_client_use_ptr(event->dest.client);
501 if (dest == NULL)
502 return NULL;
503 if (! dest->accept_input)
504 goto __not_avail;
505 if ((dest->filter & SNDRV_SEQ_FILTER_USE_EVENT) &&
506 ! test_bit(event->type, dest->event_filter))
507 goto __not_avail;
508 if (filter && !(dest->filter & filter))
509 goto __not_avail;
510
511 return dest; /* ok - accessible */
512__not_avail:
513 snd_seq_client_unlock(dest);
514 return NULL;
515}
516
517
518/*
519 * Return the error event.
520 *
521 * If the receiver client is a user client, the original event is
522 * encapsulated in SNDRV_SEQ_EVENT_BOUNCE as variable length event. If
523 * the original event is also variable length, the external data is
524 * copied after the event record.
525 * If the receiver client is a kernel client, the original event is
526 * quoted in SNDRV_SEQ_EVENT_KERNEL_ERROR, since this requires no extra
527 * kmalloc.
528 */
c7e0b5bf
TI		 529static int bounce_error_event(struct snd_seq_client *client,
530 struct snd_seq_event *event,
1da177e4
LT		 531 int err, int atomic, int hop)
532{
c7e0b5bf 533 struct snd_seq_event bounce_ev;
1da177e4
LT		 534 int result;
535
536 if (client == NULL ||
537 ! (client->filter & SNDRV_SEQ_FILTER_BOUNCE) ||
538 ! client->accept_input)
539 return 0; /* ignored */
540
541 /* set up quoted error */
542 memset(&bounce_ev, 0, sizeof(bounce_ev));
543 bounce_ev.type = SNDRV_SEQ_EVENT_KERNEL_ERROR;
544 bounce_ev.flags = SNDRV_SEQ_EVENT_LENGTH_FIXED;
545 bounce_ev.queue = SNDRV_SEQ_QUEUE_DIRECT;
546 bounce_ev.source.client = SNDRV_SEQ_CLIENT_SYSTEM;
547 bounce_ev.source.port = SNDRV_SEQ_PORT_SYSTEM_ANNOUNCE;
548 bounce_ev.dest.client = client->number;
549 bounce_ev.dest.port = event->source.port;
550 bounce_ev.data.quote.origin = event->dest;
551 bounce_ev.data.quote.event = event;
552 bounce_ev.data.quote.value = -err; /* use positive value */
553 result = snd_seq_deliver_single_event(NULL, &bounce_ev, 0, atomic, hop + 1);
554 if (result < 0) {
555 client->event_lost++;
556 return result;
557 }
558
559 return result;
560}
561
562
563/*
564 * rewrite the time-stamp of the event record with the curren time
565 * of the given queue.
566 * return non-zero if updated.
567 */
c7e0b5bf
TI		 568static int update_timestamp_of_queue(struct snd_seq_event *event,
569 int queue, int real_time)
1da177e4 570{
c7e0b5bf 571 struct snd_seq_queue *q;
1da177e4
LT		 572
573 q = queueptr(queue);
574 if (! q)
575 return 0;
576 event->queue = queue;
577 event->flags &= ~SNDRV_SEQ_TIME_STAMP_MASK;
578 if (real_time) {
579 event->time.time = snd_seq_timer_get_cur_time(q->timer);
580 event->flags |= SNDRV_SEQ_TIME_STAMP_REAL;
581 } else {
582 event->time.tick = snd_seq_timer_get_cur_tick(q->timer);
583 event->flags |= SNDRV_SEQ_TIME_STAMP_TICK;
584 }
585 queuefree(q);
586 return 1;
587}
588
589
590/*
591 * deliver an event to the specified destination.
592 * if filter is non-zero, client filter bitmap is tested.
593 *
594 * RETURN VALUE: 0 : if succeeded
595 * <0 : error
596 */
c7e0b5bf
TI		 597static int snd_seq_deliver_single_event(struct snd_seq_client *client,
598 struct snd_seq_event *event,
1da177e4
LT		 599 int filter, int atomic, int hop)
600{
c7e0b5bf
TI		 601 struct snd_seq_client *dest = NULL;
602 struct snd_seq_client_port *dest_port = NULL;
1da177e4
LT		 603 int result = -ENOENT;
604 int direct;
605
606 direct = snd_seq_ev_is_direct(event);
607
608 dest = get_event_dest_client(event, filter);
609 if (dest == NULL)
610 goto __skip;
611 dest_port = snd_seq_port_use_ptr(dest, event->dest.port);
612 if (dest_port == NULL)
613 goto __skip;
614
615 /* check permission */
616 if (! check_port_perm(dest_port, SNDRV_SEQ_PORT_CAP_WRITE)) {
617 result = -EPERM;
618 goto __skip;
619 }
620
621 if (dest_port->timestamping)
622 update_timestamp_of_queue(event, dest_port->time_queue,
623 dest_port->time_real);
624
625 switch (dest->type) {
626 case USER_CLIENT:
627 if (dest->data.user.fifo)
628 result = snd_seq_fifo_event_in(dest->data.user.fifo, event);
629 break;
630
631 case KERNEL_CLIENT:
632 if (dest_port->event_input == NULL)
633 break;
c7e0b5bf
TI		 634 result = dest_port->event_input(event, direct,
635 dest_port->private_data,
636 atomic, hop);
1da177e4
LT		 637 break;
638 default:
639 break;
640 }
641
642 __skip:
643 if (dest_port)
644 snd_seq_port_unlock(dest_port);
645 if (dest)
646 snd_seq_client_unlock(dest);
647
648 if (result < 0 && !direct) {
649 result = bounce_error_event(client, event, result, atomic, hop);
650 }
651 return result;
652}
653
654
655/*
656 * send the event to all subscribers:
657 */
c7e0b5bf
TI		 658static int deliver_to_subscribers(struct snd_seq_client *client,
659 struct snd_seq_event *event,
1da177e4
LT		 660 int atomic, int hop)
661{
c7e0b5bf 662 struct snd_seq_subscribers *subs;
27423257 663 int err, result = 0, num_ev = 0;
c7e0b5bf
TI		 664 struct snd_seq_event event_saved;
665 struct snd_seq_client_port *src_port;
c7e0b5bf 666 struct snd_seq_port_subs_info *grp;
1da177e4
LT		 667
668 src_port = snd_seq_port_use_ptr(client, event->source.port);
669 if (src_port == NULL)
670 return -EINVAL; /* invalid source port */
671 /* save original event record */
672 event_saved = *event;
673 grp = &src_port->c_src;
674
675 /* lock list */
676 if (atomic)
677 read_lock(&grp->list_lock);
678 else
679 down_read(&grp->list_mutex);
9244b2c3 680 list_for_each_entry(subs, &grp->list_head, src_list) {
7f0973e9
TI		 681 /* both ports ready? */
682 if (atomic_read(&subs->ref_count) != 2)
683 continue;
1da177e4
LT		 684 event->dest = subs->info.dest;
685 if (subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP)
686 /* convert time according to flag with subscription */
687 update_timestamp_of_queue(event, subs->info.queue,
688 subs->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL);
689 err = snd_seq_deliver_single_event(client, event,
690 0, atomic, hop);
27423257
AG		 691 if (err < 0) {
692 /* save first error that occurs and continue */
693 if (!result)
694 result = err;
695 continue;
696 }
1da177e4
LT		 697 num_ev++;
698 /* restore original event record */
699 *event = event_saved;
700 }
701 if (atomic)
702 read_unlock(&grp->list_lock);
703 else
704 up_read(&grp->list_mutex);
705 *event = event_saved; /* restore */
706 snd_seq_port_unlock(src_port);
27423257 707 return (result < 0) ? result : num_ev;
1da177e4
LT		 708}
709
710
711#ifdef SUPPORT_BROADCAST
712/*
713 * broadcast to all ports:
714 */
c7e0b5bf
TI		 715static int port_broadcast_event(struct snd_seq_client *client,
716 struct snd_seq_event *event,
1da177e4
LT		 717 int atomic, int hop)
718{
27423257 719 int num_ev = 0, err, result = 0;
c7e0b5bf 720 struct snd_seq_client *dest_client;
9244b2c3 721 struct snd_seq_client_port *port;
1da177e4
LT		 722
723 dest_client = get_event_dest_client(event, SNDRV_SEQ_FILTER_BROADCAST);
724 if (dest_client == NULL)
725 return 0; /* no matching destination */
726
727 read_lock(&dest_client->ports_lock);
9244b2c3 728 list_for_each_entry(port, &dest_client->ports_list_head, list) {
1da177e4
LT		 729 event->dest.port = port->addr.port;
730 /* pass NULL as source client to avoid error bounce */
731 err = snd_seq_deliver_single_event(NULL, event,
732 SNDRV_SEQ_FILTER_BROADCAST,
733 atomic, hop);
27423257
AG		 734 if (err < 0) {
735 /* save first error that occurs and continue */
736 if (!result)
737 result = err;
738 continue;
739 }
1da177e4
LT		 740 num_ev++;
741 }
742 read_unlock(&dest_client->ports_lock);
743 snd_seq_client_unlock(dest_client);
744 event->dest.port = SNDRV_SEQ_ADDRESS_BROADCAST; /* restore */
27423257 745 return (result < 0) ? result : num_ev;
1da177e4
LT		 746}
747
748/*
749 * send the event to all clients:
750 * if destination port is also ADDRESS_BROADCAST, deliver to all ports.
751 */
c7e0b5bf
TI		 752static int broadcast_event(struct snd_seq_client *client,
753 struct snd_seq_event *event, int atomic, int hop)
1da177e4 754{
27423257 755 int err, result = 0, num_ev = 0;
1da177e4 756 int dest;
c7e0b5bf 757 struct snd_seq_addr addr;
1da177e4
LT		 758
759 addr = event->dest; /* save */
760
761 for (dest = 0; dest < SNDRV_SEQ_MAX_CLIENTS; dest++) {
762 /* don't send to itself */
763 if (dest == client->number)
764 continue;
765 event->dest.client = dest;
766 event->dest.port = addr.port;
767 if (addr.port == SNDRV_SEQ_ADDRESS_BROADCAST)
768 err = port_broadcast_event(client, event, atomic, hop);
769 else
770 /* pass NULL as source client to avoid error bounce */
771 err = snd_seq_deliver_single_event(NULL, event,
772 SNDRV_SEQ_FILTER_BROADCAST,
773 atomic, hop);
27423257
AG		 774 if (err < 0) {
775 /* save first error that occurs and continue */
776 if (!result)
777 result = err;
778 continue;
779 }
1da177e4
LT		 780 num_ev += err;
781 }
782 event->dest = addr; /* restore */
27423257 783 return (result < 0) ? result : num_ev;
1da177e4
LT		 784}
785
786
787/* multicast - not supported yet */
c7e0b5bf 788static int multicast_event(struct snd_seq_client *client, struct snd_seq_event *event,
1da177e4
LT		 789 int atomic, int hop)
790{
04cc79a0 791 pr_debug("ALSA: seq: multicast not supported yet.\n");
1da177e4
LT		 792 return 0; /* ignored */
793}
794#endif /* SUPPORT_BROADCAST */
795
796
797/* deliver an event to the destination port(s).
798 * if the event is to subscribers or broadcast, the event is dispatched
799 * to multiple targets.
800 *
801 * RETURN VALUE: n > 0 : the number of delivered events.
802 * n == 0 : the event was not passed to any client.
803 * n < 0 : error - event was not processed.
804 */
c7e0b5bf 805static int snd_seq_deliver_event(struct snd_seq_client *client, struct snd_seq_event *event,
1da177e4
LT		 806 int atomic, int hop)
807{
808 int result;
809
810 hop++;
811 if (hop >= SNDRV_SEQ_MAX_HOPS) {
04cc79a0 812 pr_debug("ALSA: seq: too long delivery path (%d:%d->%d:%d)\n",
1da177e4
LT		 813 event->source.client, event->source.port,
814 event->dest.client, event->dest.port);
815 return -EMLINK;
816 }
817
818 if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS ||
819 event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS)
820 result = deliver_to_subscribers(client, event, atomic, hop);
821#ifdef SUPPORT_BROADCAST
822 else if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST ||
823 event->dest.client == SNDRV_SEQ_ADDRESS_BROADCAST)
824 result = broadcast_event(client, event, atomic, hop);
825 else if (event->dest.client >= SNDRV_SEQ_MAX_CLIENTS)
826 result = multicast_event(client, event, atomic, hop);
827 else if (event->dest.port == SNDRV_SEQ_ADDRESS_BROADCAST)
828 result = port_broadcast_event(client, event, atomic, hop);
829#endif
830 else
831 result = snd_seq_deliver_single_event(client, event, 0, atomic, hop);
832
833 return result;
834}
835
836/*
837 * dispatch an event cell:
838 * This function is called only from queue check routines in timer
839 * interrupts or after enqueued.
840 * The event cell shall be released or re-queued in this function.
841 *
842 * RETURN VALUE: n > 0 : the number of delivered events.
843 * n == 0 : the event was not passed to any client.
844 * n < 0 : error - event was not processed.
845 */
c7e0b5bf 846int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop)
1da177e4 847{
c7e0b5bf 848 struct snd_seq_client *client;
1da177e4
LT		 849 int result;
850
7eaa943c
TI		 851 if (snd_BUG_ON(!cell))
852 return -EINVAL;
1da177e4
LT		 853
854 client = snd_seq_client_use_ptr(cell->event.source.client);
855 if (client == NULL) {
856 snd_seq_cell_free(cell); /* release this cell */
857 return -EINVAL;
858 }
859
860 if (cell->event.type == SNDRV_SEQ_EVENT_NOTE) {
861 /* NOTE event:
862 * the event cell is re-used as a NOTE-OFF event and
863 * enqueued again.
864 */
c7e0b5bf 865 struct snd_seq_event tmpev, *ev;
1da177e4
LT		 866
867 /* reserve this event to enqueue note-off later */
868 tmpev = cell->event;
869 tmpev.type = SNDRV_SEQ_EVENT_NOTEON;
870 result = snd_seq_deliver_event(client, &tmpev, atomic, hop);
871
872 /*
873 * This was originally a note event. We now re-use the
874 * cell for the note-off event.
875 */
876
877 ev = &cell->event;
878 ev->type = SNDRV_SEQ_EVENT_NOTEOFF;
879 ev->flags |= SNDRV_SEQ_PRIORITY_HIGH;
880
881 /* add the duration time */
882 switch (ev->flags & SNDRV_SEQ_TIME_STAMP_MASK) {
883 case SNDRV_SEQ_TIME_STAMP_TICK:
884 ev->time.tick += ev->data.note.duration;
885 break;
886 case SNDRV_SEQ_TIME_STAMP_REAL:
887 /* unit for duration is ms */
888 ev->time.time.tv_nsec += 1000000 * (ev->data.note.duration % 1000);
889 ev->time.time.tv_sec += ev->data.note.duration / 1000 +
890 ev->time.time.tv_nsec / 1000000000;
891 ev->time.time.tv_nsec %= 1000000000;
892 break;
893 }
894 ev->data.note.velocity = ev->data.note.off_velocity;
895
896 /* Now queue this cell as the note off event */
897 if (snd_seq_enqueue_event(cell, atomic, hop) < 0)
898 snd_seq_cell_free(cell); /* release this cell */
899
900 } else {
901 /* Normal events:
902 * event cell is freed after processing the event
903 */
904
905 result = snd_seq_deliver_event(client, &cell->event, atomic, hop);
906 snd_seq_cell_free(cell);
907 }
908
909 snd_seq_client_unlock(client);
910 return result;
911}
912
913
914/* Allocate a cell from client pool and enqueue it to queue:
915 * if pool is empty and blocking is TRUE, sleep until a new cell is
916 * available.
917 */
c7e0b5bf
TI		 918static int snd_seq_client_enqueue_event(struct snd_seq_client *client,
919 struct snd_seq_event *event,
1da177e4
LT		 920 struct file *file, int blocking,
921 int atomic, int hop)
922{
c7e0b5bf 923 struct snd_seq_event_cell *cell;
1da177e4
LT		 924 int err;
925
926 /* special queue values - force direct passing */
927 if (event->queue == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) {
928 event->dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS;
929 event->queue = SNDRV_SEQ_QUEUE_DIRECT;
930 } else
931#ifdef SUPPORT_BROADCAST
932 if (event->queue == SNDRV_SEQ_ADDRESS_BROADCAST) {
933 event->dest.client = SNDRV_SEQ_ADDRESS_BROADCAST;
934 event->queue = SNDRV_SEQ_QUEUE_DIRECT;
935 }
936#endif
937 if (event->dest.client == SNDRV_SEQ_ADDRESS_SUBSCRIBERS) {
938 /* check presence of source port */
c7e0b5bf 939 struct snd_seq_client_port *src_port = snd_seq_port_use_ptr(client, event->source.port);
1da177e4
LT		 940 if (src_port == NULL)
941 return -EINVAL;
942 snd_seq_port_unlock(src_port);
943 }
944
945 /* direct event processing without enqueued */
946 if (snd_seq_ev_is_direct(event)) {
947 if (event->type == SNDRV_SEQ_EVENT_NOTE)
948 return -EINVAL; /* this event must be enqueued! */
949 return snd_seq_deliver_event(client, event, atomic, hop);
950 }
951
952 /* Not direct, normal queuing */
953 if (snd_seq_queue_is_used(event->queue, client->number) <= 0)
954 return -EINVAL; /* invalid queue */
955 if (! snd_seq_write_pool_allocated(client))
956 return -ENXIO; /* queue is not allocated */
957
958 /* allocate an event cell */
959 err = snd_seq_event_dup(client->pool, event, &cell, !blocking || atomic, file);
960 if (err < 0)
961 return err;
962
963 /* we got a cell. enqueue it. */
964 if ((err = snd_seq_enqueue_event(cell, atomic, hop)) < 0) {
965 snd_seq_cell_free(cell);
966 return err;
967 }
968
969 return 0;
970}
971
972
973/*
974 * check validity of event type and data length.
975 * return non-zero if invalid.
976 */
c7e0b5bf 977static int check_event_type_and_length(struct snd_seq_event *ev)
1da177e4
LT		 978{
979 switch (snd_seq_ev_length_type(ev)) {
980 case SNDRV_SEQ_EVENT_LENGTH_FIXED:
981 if (snd_seq_ev_is_variable_type(ev))
982 return -EINVAL;
983 break;
984 case SNDRV_SEQ_EVENT_LENGTH_VARIABLE:
985 if (! snd_seq_ev_is_variable_type(ev) ||
986 (ev->data.ext.len & ~SNDRV_SEQ_EXT_MASK) >= SNDRV_SEQ_MAX_EVENT_LEN)
987 return -EINVAL;
988 break;
989 case SNDRV_SEQ_EVENT_LENGTH_VARUSR:
e5723b41 990 if (! snd_seq_ev_is_direct(ev))
1da177e4
LT		 991 return -EINVAL;
992 break;
993 }
994 return 0;
995}
996
997
998/* handle write() */
999/* possible error values:
1000 * -ENXIO invalid client or file open mode
1001 * -ENOMEM malloc failed
1002 * -EFAULT seg. fault during copy from user space
1003 * -EINVAL invalid event
1004 * -EAGAIN no space in output pool
1005 * -EINTR interrupts while sleep
1006 * -EMLINK too many hops
1007 * others depends on return value from driver callback
1008 */
c7e0b5bf
TI		 1009static ssize_t snd_seq_write(struct file *file, const char __user *buf,
1010 size_t count, loff_t *offset)
1da177e4 1011{
c7e0b5bf 1012 struct snd_seq_client *client = file->private_data;
1da177e4
LT		 1013 int written = 0, len;
1014 int err = -EINVAL;
c7e0b5bf 1015 struct snd_seq_event event;
1da177e4
LT		 1016
1017 if (!(snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT))
1018 return -ENXIO;
1019
1020 /* check client structures are in place */
7eaa943c
TI		 1021 if (snd_BUG_ON(!client))
1022 return -ENXIO;
1da177e4
LT		 1023
1024 if (!client->accept_output || client->pool == NULL)
1025 return -ENXIO;
1026
1027 /* allocate the pool now if the pool is not allocated yet */
1028 if (client->pool->size > 0 && !snd_seq_write_pool_allocated(client)) {
1029 if (snd_seq_pool_init(client->pool) < 0)
1030 return -ENOMEM;
1031 }
1032
1033 /* only process whole events */
c7e0b5bf 1034 while (count >= sizeof(struct snd_seq_event)) {
1da177e4
LT		 1035 /* Read in the event header from the user */
1036 len = sizeof(event);
1037 if (copy_from_user(&event, buf, len)) {
1038 err = -EFAULT;
1039 break;
1040 }
1041 event.source.client = client->number; /* fill in client number */
1042 /* Check for extension data length */
1043 if (check_event_type_and_length(&event)) {
1044 err = -EINVAL;
1045 break;
1046 }
1047
1048 /* check for special events */
1049 if (event.type == SNDRV_SEQ_EVENT_NONE)
1050 goto __skip_event;
1051 else if (snd_seq_ev_is_reserved(&event)) {
1052 err = -EINVAL;
1053 break;
1054 }
1055
1056 if (snd_seq_ev_is_variable(&event)) {
1057 int extlen = event.data.ext.len & ~SNDRV_SEQ_EXT_MASK;
1058 if ((size_t)(extlen + len) > count) {
1059 /* back out, will get an error this time or next */
1060 err = -EINVAL;
1061 break;
1062 }
1063 /* set user space pointer */
1064 event.data.ext.len = extlen | SNDRV_SEQ_EXT_USRPTR;
4d23359b 1065 event.data.ext.ptr = (char __force *)buf
c7e0b5bf 1066 + sizeof(struct snd_seq_event);
1da177e4
LT		 1067 len += extlen; /* increment data length */
1068 } else {
1069#ifdef CONFIG_COMPAT
1070 if (client->convert32 && snd_seq_ev_is_varusr(&event)) {
fea952e5 1071 void *ptr = (void __force *)compat_ptr(event.data.raw32.d[1]);
1da177e4
LT		 1072 event.data.ext.ptr = ptr;
1073 }
1074#endif
1075 }
1076
1077 /* ok, enqueue it */
1078 err = snd_seq_client_enqueue_event(client, &event, file,
1079 !(file->f_flags & O_NONBLOCK),
1080 0, 0);
1081 if (err < 0)
1082 break;
1083
1084 __skip_event:
1085 /* Update pointers and counts */
1086 count -= len;
1087 buf += len;
1088 written += len;
1089 }
1090
1091 return written ? written : err;
1092}
1093
1094
1095/*
1096 * handle polling
1097 */
1098static unsigned int snd_seq_poll(struct file *file, poll_table * wait)
1099{
c7e0b5bf 1100 struct snd_seq_client *client = file->private_data;
1da177e4
LT		 1101 unsigned int mask = 0;
1102
1103 /* check client structures are in place */
7eaa943c
TI		 1104 if (snd_BUG_ON(!client))
1105 return -ENXIO;
1da177e4
LT		 1106
1107 if ((snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_INPUT) &&
1108 client->data.user.fifo) {
1109
1110 /* check if data is available in the outqueue */
1111 if (snd_seq_fifo_poll_wait(client->data.user.fifo, file, wait))
1112 mask |= POLLIN | POLLRDNORM;
1113 }
1114
1115 if (snd_seq_file_flags(file) & SNDRV_SEQ_LFLG_OUTPUT) {
1116
1117 /* check if data is available in the pool */
1118 if (!snd_seq_write_pool_allocated(client) ||
1119 snd_seq_pool_poll_wait(client->pool, file, wait))
1120 mask |= POLLOUT | POLLWRNORM;
1121 }
1122
1123 return mask;
1124}
1125
1126
1127/*-----------------------------------------------------*/
1128
1129
1130/* SYSTEM_INFO ioctl() */
c7e0b5bf 1131static int snd_seq_ioctl_system_info(struct snd_seq_client *client, void __user *arg)
1da177e4 1132{
c7e0b5bf 1133 struct snd_seq_system_info info;
1da177e4
LT		 1134
1135 memset(&info, 0, sizeof(info));
1136 /* fill the info fields */
1137 info.queues = SNDRV_SEQ_MAX_QUEUES;
1138 info.clients = SNDRV_SEQ_MAX_CLIENTS;
467be357 1139 info.ports = SNDRV_SEQ_MAX_PORTS;
1da177e4
LT		 1140 info.channels = 256; /* fixed limit */
1141 info.cur_clients = client_usage.cur;
1142 info.cur_queues = snd_seq_queue_get_cur_queues();
1143
1144 if (copy_to_user(arg, &info, sizeof(info)))
1145 return -EFAULT;
1146 return 0;
1147}
1148
1149
1150/* RUNNING_MODE ioctl() */
c7e0b5bf 1151static int snd_seq_ioctl_running_mode(struct snd_seq_client *client, void __user *arg)
1da177e4 1152{
c7e0b5bf
TI		 1153 struct snd_seq_running_info info;
1154 struct snd_seq_client *cptr;
1da177e4
LT		 1155 int err = 0;
1156
1157 if (copy_from_user(&info, arg, sizeof(info)))
1158 return -EFAULT;
1159
1160 /* requested client number */
1161 cptr = snd_seq_client_use_ptr(info.client);
1162 if (cptr == NULL)
1163 return -ENOENT; /* don't change !!! */
1164
1165#ifdef SNDRV_BIG_ENDIAN
1166 if (! info.big_endian) {
1167 err = -EINVAL;
1168 goto __err;
1169 }
1170#else
1171 if (info.big_endian) {
1172 err = -EINVAL;
1173 goto __err;
1174 }
1175
1176#endif
1177 if (info.cpu_mode > sizeof(long)) {
1178 err = -EINVAL;
1179 goto __err;
1180 }
1181 cptr->convert32 = (info.cpu_mode < sizeof(long));
1182 __err:
1183 snd_seq_client_unlock(cptr);
1184 return err;
1185}
1186
1187/* CLIENT_INFO ioctl() */
c7e0b5bf
TI		 1188static void get_client_info(struct snd_seq_client *cptr,
1189 struct snd_seq_client_info *info)
1da177e4
LT		 1190{
1191 info->client = cptr->number;
1192
1193 /* fill the info fields */
1194 info->type = cptr->type;
1195 strcpy(info->name, cptr->name);
1196 info->filter = cptr->filter;
1197 info->event_lost = cptr->event_lost;
1198 memcpy(info->event_filter, cptr->event_filter, 32);
1199 info->num_ports = cptr->num_ports;
1200 memset(info->reserved, 0, sizeof(info->reserved));
1201}
1202
c7e0b5bf
TI		 1203static int snd_seq_ioctl_get_client_info(struct snd_seq_client *client,
1204 void __user *arg)
1da177e4 1205{
c7e0b5bf
TI		 1206 struct snd_seq_client *cptr;
1207 struct snd_seq_client_info client_info;
1da177e4
LT		 1208
1209 if (copy_from_user(&client_info, arg, sizeof(client_info)))
1210 return -EFAULT;
1211
1212 /* requested client number */
1213 cptr = snd_seq_client_use_ptr(client_info.client);
1214 if (cptr == NULL)
1215 return -ENOENT; /* don't change !!! */
1216
1217 get_client_info(cptr, &client_info);
1218 snd_seq_client_unlock(cptr);
1219
1220 if (copy_to_user(arg, &client_info, sizeof(client_info)))
1221 return -EFAULT;
1222 return 0;
1223}
1224
1225
1226/* CLIENT_INFO ioctl() */
c7e0b5bf
TI		 1227static int snd_seq_ioctl_set_client_info(struct snd_seq_client *client,
1228 void __user *arg)
1da177e4 1229{
c7e0b5bf 1230 struct snd_seq_client_info client_info;
1da177e4
LT		 1231
1232 if (copy_from_user(&client_info, arg, sizeof(client_info)))
1233 return -EFAULT;
1234
1235 /* it is not allowed to set the info fields for an another client */
1236 if (client->number != client_info.client)
1237 return -EPERM;
1238 /* also client type must be set now */
1239 if (client->type != client_info.type)
1240 return -EINVAL;
1241
1242 /* fill the info fields */
1243 if (client_info.name[0])
1244 strlcpy(client->name, client_info.name, sizeof(client->name));
1245
1246 client->filter = client_info.filter;
1247 client->event_lost = client_info.event_lost;
1248 memcpy(client->event_filter, client_info.event_filter, 32);
1249
1250 return 0;
1251}
1252
1253
1254/*
1255 * CREATE PORT ioctl()
1256 */
c7e0b5bf
TI		 1257static int snd_seq_ioctl_create_port(struct snd_seq_client *client,
1258 void __user *arg)
1da177e4 1259{
c7e0b5bf
TI		 1260 struct snd_seq_client_port *port;
1261 struct snd_seq_port_info info;
1262 struct snd_seq_port_callback *callback;
1da177e4
LT		 1263
1264 if (copy_from_user(&info, arg, sizeof(info)))
1265 return -EFAULT;
1266
1267 /* it is not allowed to create the port for an another client */
1268 if (info.addr.client != client->number)
1269 return -EPERM;
1270
1271 port = snd_seq_create_port(client, (info.flags & SNDRV_SEQ_PORT_FLG_GIVEN_PORT) ? info.addr.port : -1);
1272 if (port == NULL)
1273 return -ENOMEM;
1274
1275 if (client->type == USER_CLIENT && info.kernel) {
1276 snd_seq_delete_port(client, port->addr.port);
1277 return -EINVAL;
1278 }
1279 if (client->type == KERNEL_CLIENT) {
1280 if ((callback = info.kernel) != NULL) {
1281 if (callback->owner)
1282 port->owner = callback->owner;
1283 port->private_data = callback->private_data;
1284 port->private_free = callback->private_free;
1da177e4
LT		 1285 port->event_input = callback->event_input;
1286 port->c_src.open = callback->subscribe;
1287 port->c_src.close = callback->unsubscribe;
1288 port->c_dest.open = callback->use;
1289 port->c_dest.close = callback->unuse;
1290 }
1291 }
1292
1293 info.addr = port->addr;
1294
1295 snd_seq_set_port_info(port, &info);
1296 snd_seq_system_client_ev_port_start(port->addr.client, port->addr.port);
1297
1298 if (copy_to_user(arg, &info, sizeof(info)))
1299 return -EFAULT;
1300
1301 return 0;
1302}
1303
1304/*
1305 * DELETE PORT ioctl()
1306 */
c7e0b5bf
TI		 1307static int snd_seq_ioctl_delete_port(struct snd_seq_client *client,
1308 void __user *arg)
1da177e4 1309{
c7e0b5bf 1310 struct snd_seq_port_info info;
1da177e4
LT		 1311 int err;
1312
1313 /* set passed parameters */
1314 if (copy_from_user(&info, arg, sizeof(info)))
1315 return -EFAULT;
1316
1317 /* it is not allowed to remove the port for an another client */
1318 if (info.addr.client != client->number)
1319 return -EPERM;
1320
1321 err = snd_seq_delete_port(client, info.addr.port);
1322 if (err >= 0)
1323 snd_seq_system_client_ev_port_exit(client->number, info.addr.port);
1324 return err;
1325}
1326
1327
1328/*
1329 * GET_PORT_INFO ioctl() (on any client)
1330 */
c7e0b5bf
TI		 1331static int snd_seq_ioctl_get_port_info(struct snd_seq_client *client,
1332 void __user *arg)
1da177e4 1333{
c7e0b5bf
TI		 1334 struct snd_seq_client *cptr;
1335 struct snd_seq_client_port *port;
1336 struct snd_seq_port_info info;
1da177e4
LT		 1337
1338 if (copy_from_user(&info, arg, sizeof(info)))
1339 return -EFAULT;
1340 cptr = snd_seq_client_use_ptr(info.addr.client);
1341 if (cptr == NULL)
1342 return -ENXIO;
1343
1344 port = snd_seq_port_use_ptr(cptr, info.addr.port);
1345 if (port == NULL) {
1346 snd_seq_client_unlock(cptr);
1347 return -ENOENT; /* don't change */
1348 }
1349
1350 /* get port info */
1351 snd_seq_get_port_info(port, &info);
1352 snd_seq_port_unlock(port);
1353 snd_seq_client_unlock(cptr);
1354
1355 if (copy_to_user(arg, &info, sizeof(info)))
1356 return -EFAULT;
1357 return 0;
1358}
1359
1360
1361/*
1362 * SET_PORT_INFO ioctl() (only ports on this/own client)
1363 */
c7e0b5bf
TI		 1364static int snd_seq_ioctl_set_port_info(struct snd_seq_client *client,
1365 void __user *arg)
1da177e4 1366{
c7e0b5bf
TI		 1367 struct snd_seq_client_port *port;
1368 struct snd_seq_port_info info;
1da177e4
LT		 1369
1370 if (copy_from_user(&info, arg, sizeof(info)))
1371 return -EFAULT;
1372
1373 if (info.addr.client != client->number) /* only set our own ports ! */
1374 return -EPERM;
1375 port = snd_seq_port_use_ptr(client, info.addr.port);
1376 if (port) {
1377 snd_seq_set_port_info(port, &info);
1378 snd_seq_port_unlock(port);
1379 }
1380 return 0;
1381}
1382
1383
1384/*
1385 * port subscription (connection)
1386 */
1387#define PERM_RD (SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_SUBS_READ)
1388#define PERM_WR (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_SUBS_WRITE)
1389
c7e0b5bf
TI		 1390static int check_subscription_permission(struct snd_seq_client *client,
1391 struct snd_seq_client_port *sport,
1392 struct snd_seq_client_port *dport,
1393 struct snd_seq_port_subscribe *subs)
1da177e4
LT		 1394{
1395 if (client->number != subs->sender.client &&
1396 client->number != subs->dest.client) {
1397 /* connection by third client - check export permission */
1398 if (check_port_perm(sport, SNDRV_SEQ_PORT_CAP_NO_EXPORT))
1399 return -EPERM;
1400 if (check_port_perm(dport, SNDRV_SEQ_PORT_CAP_NO_EXPORT))
1401 return -EPERM;
1402 }
1403
1404 /* check read permission */
1405 /* if sender or receiver is the subscribing client itself,
1406 * no permission check is necessary
1407 */
1408 if (client->number != subs->sender.client) {
1409 if (! check_port_perm(sport, PERM_RD))
1410 return -EPERM;
1411 }
1412 /* check write permission */
1413 if (client->number != subs->dest.client) {
1414 if (! check_port_perm(dport, PERM_WR))
1415 return -EPERM;
1416 }
1417 return 0;
1418}
1419
1420/*
1421 * send an subscription notify event to user client:
1422 * client must be user client.
1423 */
1424int snd_seq_client_notify_subscription(int client, int port,
c7e0b5bf
TI		 1425 struct snd_seq_port_subscribe *info,
1426 int evtype)
1da177e4 1427{
c7e0b5bf 1428 struct snd_seq_event event;
1da177e4
LT		 1429
1430 memset(&event, 0, sizeof(event));
1431 event.type = evtype;
1432 event.data.connect.dest = info->dest;
1433 event.data.connect.sender = info->sender;
1434
1435 return snd_seq_system_notify(client, port, &event); /* non-atomic */
1436}
1437
1438
1439/*
1440 * add to port's subscription list IOCTL interface
1441 */
c7e0b5bf
TI		 1442static int snd_seq_ioctl_subscribe_port(struct snd_seq_client *client,
1443 void __user *arg)
1da177e4
LT		 1444{
1445 int result = -EINVAL;
c7e0b5bf
TI		 1446 struct snd_seq_client *receiver = NULL, *sender = NULL;
1447 struct snd_seq_client_port *sport = NULL, *dport = NULL;
1448 struct snd_seq_port_subscribe subs;
1da177e4
LT		 1449
1450 if (copy_from_user(&subs, arg, sizeof(subs)))
1451 return -EFAULT;
1452
1453 if ((receiver = snd_seq_client_use_ptr(subs.dest.client)) == NULL)
1454 goto __end;
1455 if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL)
1456 goto __end;
1457 if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL)
1458 goto __end;
1459 if ((dport = snd_seq_port_use_ptr(receiver, subs.dest.port)) == NULL)
1460 goto __end;
1461
1462 result = check_subscription_permission(client, sport, dport, &subs);
1463 if (result < 0)
1464 goto __end;
1465
1466 /* connect them */
1467 result = snd_seq_port_connect(client, sender, sport, receiver, dport, &subs);
1468 if (! result) /* broadcast announce */
1469 snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0,
1470 &subs, SNDRV_SEQ_EVENT_PORT_SUBSCRIBED);
1471 __end:
1472 if (sport)
1473 snd_seq_port_unlock(sport);
1474 if (dport)
1475 snd_seq_port_unlock(dport);
1476 if (sender)
1477 snd_seq_client_unlock(sender);
1478 if (receiver)
1479 snd_seq_client_unlock(receiver);
1480 return result;
1481}
1482
1483
1484/*
1485 * remove from port's subscription list
1486 */
c7e0b5bf
TI		 1487static int snd_seq_ioctl_unsubscribe_port(struct snd_seq_client *client,
1488 void __user *arg)
1da177e4
LT		 1489{
1490 int result = -ENXIO;
c7e0b5bf
TI		 1491 struct snd_seq_client *receiver = NULL, *sender = NULL;
1492 struct snd_seq_client_port *sport = NULL, *dport = NULL;
1493 struct snd_seq_port_subscribe subs;
1da177e4
LT		 1494
1495 if (copy_from_user(&subs, arg, sizeof(subs)))
1496 return -EFAULT;
1497
1498 if ((receiver = snd_seq_client_use_ptr(subs.dest.client)) == NULL)
1499 goto __end;
1500 if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL)
1501 goto __end;
1502 if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL)
1503 goto __end;
1504 if ((dport = snd_seq_port_use_ptr(receiver, subs.dest.port)) == NULL)
1505 goto __end;
1506
1507 result = check_subscription_permission(client, sport, dport, &subs);
1508 if (result < 0)
1509 goto __end;
1510
1511 result = snd_seq_port_disconnect(client, sender, sport, receiver, dport, &subs);
1512 if (! result) /* broadcast announce */
1513 snd_seq_client_notify_subscription(SNDRV_SEQ_ADDRESS_SUBSCRIBERS, 0,
1514 &subs, SNDRV_SEQ_EVENT_PORT_UNSUBSCRIBED);
1515 __end:
1516 if (sport)
1517 snd_seq_port_unlock(sport);
1518 if (dport)
1519 snd_seq_port_unlock(dport);
1520 if (sender)
1521 snd_seq_client_unlock(sender);
1522 if (receiver)
1523 snd_seq_client_unlock(receiver);
1524 return result;
1525}
1526
1527
1528/* CREATE_QUEUE ioctl() */
c7e0b5bf
TI		 1529static int snd_seq_ioctl_create_queue(struct snd_seq_client *client,
1530 void __user *arg)
1da177e4 1531{
c7e0b5bf 1532 struct snd_seq_queue_info info;
1da177e4 1533 int result;
c7e0b5bf 1534 struct snd_seq_queue *q;
1da177e4
LT		 1535
1536 if (copy_from_user(&info, arg, sizeof(info)))
1537 return -EFAULT;
1538
1539 result = snd_seq_queue_alloc(client->number, info.locked, info.flags);
1540 if (result < 0)
1541 return result;
1542
1543 q = queueptr(result);
1544 if (q == NULL)
1545 return -EINVAL;
1546
1547 info.queue = q->queue;
1548 info.locked = q->locked;
1549 info.owner = q->owner;
1550
1551 /* set queue name */
1552 if (! info.name[0])
1553 snprintf(info.name, sizeof(info.name), "Queue-%d", q->queue);
1554 strlcpy(q->name, info.name, sizeof(q->name));
1555 queuefree(q);
1556
1557 if (copy_to_user(arg, &info, sizeof(info)))
1558 return -EFAULT;
1559
1560 return 0;
1561}
1562
1563/* DELETE_QUEUE ioctl() */
c7e0b5bf
TI		 1564static int snd_seq_ioctl_delete_queue(struct snd_seq_client *client,
1565 void __user *arg)
1da177e4 1566{
c7e0b5bf 1567 struct snd_seq_queue_info info;
1da177e4
LT		 1568
1569 if (copy_from_user(&info, arg, sizeof(info)))
1570 return -EFAULT;
1571
1572 return snd_seq_queue_delete(client->number, info.queue);
1573}
1574
1575/* GET_QUEUE_INFO ioctl() */
c7e0b5bf
TI		 1576static int snd_seq_ioctl_get_queue_info(struct snd_seq_client *client,
1577 void __user *arg)
1da177e4 1578{
c7e0b5bf
TI		 1579 struct snd_seq_queue_info info;
1580 struct snd_seq_queue *q;
1da177e4
LT		 1581
1582 if (copy_from_user(&info, arg, sizeof(info)))
1583 return -EFAULT;
1584
1585 q = queueptr(info.queue);
1586 if (q == NULL)
1587 return -EINVAL;
1588
1589 memset(&info, 0, sizeof(info));
1590 info.queue = q->queue;
1591 info.owner = q->owner;
1592 info.locked = q->locked;
1593 strlcpy(info.name, q->name, sizeof(info.name));
1594 queuefree(q);
1595
1596 if (copy_to_user(arg, &info, sizeof(info)))
1597 return -EFAULT;
1598
1599 return 0;
1600}
1601
1602/* SET_QUEUE_INFO ioctl() */
c7e0b5bf
TI		 1603static int snd_seq_ioctl_set_queue_info(struct snd_seq_client *client,
1604 void __user *arg)
1da177e4 1605{
c7e0b5bf
TI		 1606 struct snd_seq_queue_info info;
1607 struct snd_seq_queue *q;
1da177e4
LT		 1608
1609 if (copy_from_user(&info, arg, sizeof(info)))
1610 return -EFAULT;
1611
1612 if (info.owner != client->number)
1613 return -EINVAL;
1614
1615 /* change owner/locked permission */
1616 if (snd_seq_queue_check_access(info.queue, client->number)) {
1617 if (snd_seq_queue_set_owner(info.queue, client->number, info.locked) < 0)
1618 return -EPERM;
1619 if (info.locked)
1620 snd_seq_queue_use(info.queue, client->number, 1);
1621 } else {
1622 return -EPERM;
1623 }
1624
1625 q = queueptr(info.queue);
1626 if (! q)
1627 return -EINVAL;
1628 if (q->owner != client->number) {
1629 queuefree(q);
1630 return -EPERM;
1631 }
1632 strlcpy(q->name, info.name, sizeof(q->name));
1633 queuefree(q);
1634
1635 return 0;
1636}
1637
1638/* GET_NAMED_QUEUE ioctl() */
c7e0b5bf 1639static int snd_seq_ioctl_get_named_queue(struct snd_seq_client *client, void __user *arg)
1da177e4 1640{
c7e0b5bf
TI		 1641 struct snd_seq_queue_info info;
1642 struct snd_seq_queue *q;
1da177e4
LT		 1643
1644 if (copy_from_user(&info, arg, sizeof(info)))
1645 return -EFAULT;
1646
1647 q = snd_seq_queue_find_name(info.name);
1648 if (q == NULL)
1649 return -EINVAL;
1650 info.queue = q->queue;
1651 info.owner = q->owner;
1652 info.locked = q->locked;
1653 queuefree(q);
1654
1655 if (copy_to_user(arg, &info, sizeof(info)))
1656 return -EFAULT;
1657
1658 return 0;
1659}
1660
1661/* GET_QUEUE_STATUS ioctl() */
c7e0b5bf
TI		 1662static int snd_seq_ioctl_get_queue_status(struct snd_seq_client *client,
1663 void __user *arg)
1da177e4 1664{
c7e0b5bf
TI		 1665 struct snd_seq_queue_status status;
1666 struct snd_seq_queue *queue;
1667 struct snd_seq_timer *tmr;
1da177e4
LT		 1668
1669 if (copy_from_user(&status, arg, sizeof(status)))
1670 return -EFAULT;
1671
1672 queue = queueptr(status.queue);
1673 if (queue == NULL)
1674 return -EINVAL;
1675 memset(&status, 0, sizeof(status));
1676 status.queue = queue->queue;
1677
1678 tmr = queue->timer;
1679 status.events = queue->tickq->cells + queue->timeq->cells;
1680
1681 status.time = snd_seq_timer_get_cur_time(tmr);
1682 status.tick = snd_seq_timer_get_cur_tick(tmr);
1683
1684 status.running = tmr->running;
1685
1686 status.flags = queue->flags;
1687 queuefree(queue);
1688
1689 if (copy_to_user(arg, &status, sizeof(status)))
1690 return -EFAULT;
1691 return 0;
1692}
1693
1694
1695/* GET_QUEUE_TEMPO ioctl() */
c7e0b5bf
TI		 1696static int snd_seq_ioctl_get_queue_tempo(struct snd_seq_client *client,
1697 void __user *arg)
1da177e4 1698{
c7e0b5bf
TI		 1699 struct snd_seq_queue_tempo tempo;
1700 struct snd_seq_queue *queue;
1701 struct snd_seq_timer *tmr;
1da177e4
LT		 1702
1703 if (copy_from_user(&tempo, arg, sizeof(tempo)))
1704 return -EFAULT;
1705
1706 queue = queueptr(tempo.queue);
1707 if (queue == NULL)
1708 return -EINVAL;
1709 memset(&tempo, 0, sizeof(tempo));
1710 tempo.queue = queue->queue;
1711
1712 tmr = queue->timer;
1713
1714 tempo.tempo = tmr->tempo;
1715 tempo.ppq = tmr->ppq;
1716 tempo.skew_value = tmr->skew;
1717 tempo.skew_base = tmr->skew_base;
1718 queuefree(queue);
1719
1720 if (copy_to_user(arg, &tempo, sizeof(tempo)))
1721 return -EFAULT;
1722 return 0;
1723}
1724
1725
1726/* SET_QUEUE_TEMPO ioctl() */
c7e0b5bf 1727int snd_seq_set_queue_tempo(int client, struct snd_seq_queue_tempo *tempo)
1da177e4
LT		 1728{
1729 if (!snd_seq_queue_check_access(tempo->queue, client))
1730 return -EPERM;
1731 return snd_seq_queue_timer_set_tempo(tempo->queue, client, tempo);
1732}
1733
91715ed9
TI		 1734EXPORT_SYMBOL(snd_seq_set_queue_tempo);
1735
c7e0b5bf
TI		 1736static int snd_seq_ioctl_set_queue_tempo(struct snd_seq_client *client,
1737 void __user *arg)
1da177e4
LT		 1738{
1739 int result;
c7e0b5bf 1740 struct snd_seq_queue_tempo tempo;
1da177e4
LT		 1741
1742 if (copy_from_user(&tempo, arg, sizeof(tempo)))
1743 return -EFAULT;
1744
1745 result = snd_seq_set_queue_tempo(client->number, &tempo);
1746 return result < 0 ? result : 0;
1747}
1748
1749
1750/* GET_QUEUE_TIMER ioctl() */
c7e0b5bf
TI		 1751static int snd_seq_ioctl_get_queue_timer(struct snd_seq_client *client,
1752 void __user *arg)
1da177e4 1753{
c7e0b5bf
TI		 1754 struct snd_seq_queue_timer timer;
1755 struct snd_seq_queue *queue;
1756 struct snd_seq_timer *tmr;
1da177e4
LT		 1757
1758 if (copy_from_user(&timer, arg, sizeof(timer)))
1759 return -EFAULT;
1760
1761 queue = queueptr(timer.queue);
1762 if (queue == NULL)
1763 return -EINVAL;
1764
1a60d4c5 1765 if (mutex_lock_interruptible(&queue->timer_mutex)) {
1da177e4
LT		 1766 queuefree(queue);
1767 return -ERESTARTSYS;
1768 }
1769 tmr = queue->timer;
1770 memset(&timer, 0, sizeof(timer));
1771 timer.queue = queue->queue;
1772
1773 timer.type = tmr->type;
1774 if (tmr->type == SNDRV_SEQ_TIMER_ALSA) {
1775 timer.u.alsa.id = tmr->alsa_id;
1776 timer.u.alsa.resolution = tmr->preferred_resolution;
1777 }
1a60d4c5 1778 mutex_unlock(&queue->timer_mutex);
1da177e4
LT		 1779 queuefree(queue);
1780
1781 if (copy_to_user(arg, &timer, sizeof(timer)))
1782 return -EFAULT;
1783 return 0;
1784}
1785
1786
1787/* SET_QUEUE_TIMER ioctl() */
c7e0b5bf
TI		 1788static int snd_seq_ioctl_set_queue_timer(struct snd_seq_client *client,
1789 void __user *arg)
1da177e4
LT		 1790{
1791 int result = 0;
c7e0b5bf 1792 struct snd_seq_queue_timer timer;
1da177e4
LT		 1793
1794 if (copy_from_user(&timer, arg, sizeof(timer)))
1795 return -EFAULT;
1796
1797 if (timer.type != SNDRV_SEQ_TIMER_ALSA)
1798 return -EINVAL;
1799
1800 if (snd_seq_queue_check_access(timer.queue, client->number)) {
c7e0b5bf
TI		 1801 struct snd_seq_queue *q;
1802 struct snd_seq_timer *tmr;
1da177e4
LT		 1803
1804 q = queueptr(timer.queue);
1805 if (q == NULL)
1806 return -ENXIO;
1a60d4c5 1807 if (mutex_lock_interruptible(&q->timer_mutex)) {
1da177e4
LT		 1808 queuefree(q);
1809 return -ERESTARTSYS;
1810 }
1811 tmr = q->timer;
1812 snd_seq_queue_timer_close(timer.queue);
1813 tmr->type = timer.type;
1814 if (tmr->type == SNDRV_SEQ_TIMER_ALSA) {
1815 tmr->alsa_id = timer.u.alsa.id;
1816 tmr->preferred_resolution = timer.u.alsa.resolution;
1817 }
1818 result = snd_seq_queue_timer_open(timer.queue);
1a60d4c5 1819 mutex_unlock(&q->timer_mutex);
1da177e4
LT		 1820 queuefree(q);
1821 } else {
1822 return -EPERM;
1823 }
1824
1825 return result;
1826}
1827
1828
1829/* GET_QUEUE_CLIENT ioctl() */
c7e0b5bf
TI		 1830static int snd_seq_ioctl_get_queue_client(struct snd_seq_client *client,
1831 void __user *arg)
1da177e4 1832{
c7e0b5bf 1833 struct snd_seq_queue_client info;
1da177e4
LT		 1834 int used;
1835
1836 if (copy_from_user(&info, arg, sizeof(info)))
1837 return -EFAULT;
1838
1839 used = snd_seq_queue_is_used(info.queue, client->number);
1840 if (used < 0)
1841 return -EINVAL;
1842 info.used = used;
1843 info.client = client->number;
1844
1845 if (copy_to_user(arg, &info, sizeof(info)))
1846 return -EFAULT;
1847 return 0;
1848}
1849
1850
1851/* SET_QUEUE_CLIENT ioctl() */
c7e0b5bf
TI		 1852static int snd_seq_ioctl_set_queue_client(struct snd_seq_client *client,
1853 void __user *arg)
1da177e4
LT		 1854{
1855 int err;
c7e0b5bf 1856 struct snd_seq_queue_client info;
1da177e4
LT		 1857
1858 if (copy_from_user(&info, arg, sizeof(info)))
1859 return -EFAULT;
1860
1861 if (info.used >= 0) {
1862 err = snd_seq_queue_use(info.queue, client->number, info.used);
1863 if (err < 0)
1864 return err;
1865 }
1866
1867 return snd_seq_ioctl_get_queue_client(client, arg);
1868}
1869
1870
1871/* GET_CLIENT_POOL ioctl() */
c7e0b5bf
TI		 1872static int snd_seq_ioctl_get_client_pool(struct snd_seq_client *client,
1873 void __user *arg)
1da177e4 1874{
c7e0b5bf
TI		 1875 struct snd_seq_client_pool info;
1876 struct snd_seq_client *cptr;
1da177e4
LT		 1877
1878 if (copy_from_user(&info, arg, sizeof(info)))
1879 return -EFAULT;
1880
1881 cptr = snd_seq_client_use_ptr(info.client);
1882 if (cptr == NULL)
1883 return -ENOENT;
1884 memset(&info, 0, sizeof(info));
3e21a19d 1885 info.client = cptr->number;
1da177e4
LT		 1886 info.output_pool = cptr->pool->size;
1887 info.output_room = cptr->pool->room;
1888 info.output_free = info.output_pool;
e64d2e36 1889 info.output_free = snd_seq_unused_cells(cptr->pool);
1da177e4
LT		 1890 if (cptr->type == USER_CLIENT) {
1891 info.input_pool = cptr->data.user.fifo_pool_size;
1892 info.input_free = info.input_pool;
1893 if (cptr->data.user.fifo)
1894 info.input_free = snd_seq_unused_cells(cptr->data.user.fifo->pool);
1895 } else {
1896 info.input_pool = 0;
1897 info.input_free = 0;
1898 }
1899 snd_seq_client_unlock(cptr);
1900
1901 if (copy_to_user(arg, &info, sizeof(info)))
1902 return -EFAULT;
1903 return 0;
1904}
1905
1906/* SET_CLIENT_POOL ioctl() */
c7e0b5bf
TI		 1907static int snd_seq_ioctl_set_client_pool(struct snd_seq_client *client,
1908 void __user *arg)
1da177e4 1909{
c7e0b5bf 1910 struct snd_seq_client_pool info;
1da177e4
LT		 1911 int rc;
1912
1913 if (copy_from_user(&info, arg, sizeof(info)))
1914 return -EFAULT;
1915
1916 if (client->number != info.client)
1917 return -EINVAL; /* can't change other clients */
1918
1919 if (info.output_pool >= 1 && info.output_pool <= SNDRV_SEQ_MAX_EVENTS &&
1920 (! snd_seq_write_pool_allocated(client) ||
1921 info.output_pool != client->pool->size)) {
1922 if (snd_seq_write_pool_allocated(client)) {
1923 /* remove all existing cells */
1924 snd_seq_queue_client_leave_cells(client->number);
1925 snd_seq_pool_done(client->pool);
1926 }
1927 client->pool->size = info.output_pool;
1928 rc = snd_seq_pool_init(client->pool);
1929 if (rc < 0)
1930 return rc;
1931 }
1932 if (client->type == USER_CLIENT && client->data.user.fifo != NULL &&
1933 info.input_pool >= 1 &&
1934 info.input_pool <= SNDRV_SEQ_MAX_CLIENT_EVENTS &&
1935 info.input_pool != client->data.user.fifo_pool_size) {
1936 /* change pool size */
1937 rc = snd_seq_fifo_resize(client->data.user.fifo, info.input_pool);
1938 if (rc < 0)
1939 return rc;
1940 client->data.user.fifo_pool_size = info.input_pool;
1941 }
1942 if (info.output_room >= 1 &&
1943 info.output_room <= client->pool->size) {
1944 client->pool->room = info.output_room;
1945 }
1946
1947 return snd_seq_ioctl_get_client_pool(client, arg);
1948}
1949
1950
1951/* REMOVE_EVENTS ioctl() */
c7e0b5bf
TI		 1952static int snd_seq_ioctl_remove_events(struct snd_seq_client *client,
1953 void __user *arg)
1da177e4 1954{
c7e0b5bf 1955 struct snd_seq_remove_events info;
1da177e4
LT		 1956
1957 if (copy_from_user(&info, arg, sizeof(info)))
1958 return -EFAULT;
1959
1960 /*
1961 * Input mostly not implemented XXX.
1962 */
1963 if (info.remove_mode & SNDRV_SEQ_REMOVE_INPUT) {
1964 /*
1965 * No restrictions so for a user client we can clear
1966 * the whole fifo
1967 */
030e2c78 1968 if (client->type == USER_CLIENT && client->data.user.fifo)
1da177e4
LT		 1969 snd_seq_fifo_clear(client->data.user.fifo);
1970 }
1971
1972 if (info.remove_mode & SNDRV_SEQ_REMOVE_OUTPUT)
1973 snd_seq_queue_remove_cells(client->number, &info);
1974
1975 return 0;
1976}
1977
1978
1979/*
1980 * get subscription info
1981 */
c7e0b5bf
TI		 1982static int snd_seq_ioctl_get_subscription(struct snd_seq_client *client,
1983 void __user *arg)
1da177e4
LT		 1984{
1985 int result;
c7e0b5bf
TI		 1986 struct snd_seq_client *sender = NULL;
1987 struct snd_seq_client_port *sport = NULL;
1988 struct snd_seq_port_subscribe subs;
1989 struct snd_seq_subscribers *p;
1da177e4
LT		 1990
1991 if (copy_from_user(&subs, arg, sizeof(subs)))
1992 return -EFAULT;
1993
1994 result = -EINVAL;
1995 if ((sender = snd_seq_client_use_ptr(subs.sender.client)) == NULL)
1996 goto __end;
1997 if ((sport = snd_seq_port_use_ptr(sender, subs.sender.port)) == NULL)
1998 goto __end;
1999 p = snd_seq_port_get_subscription(&sport->c_src, &subs.dest);
2000 if (p) {
2001 result = 0;
2002 subs = p->info;
2003 } else
2004 result = -ENOENT;
2005
2006 __end:
2007 if (sport)
2008 snd_seq_port_unlock(sport);
2009 if (sender)
2010 snd_seq_client_unlock(sender);
2011 if (result >= 0) {
2012 if (copy_to_user(arg, &subs, sizeof(subs)))
2013 return -EFAULT;
2014 }
2015 return result;
2016}
2017
2018
2019/*
2020 * get subscription info - check only its presence
2021 */
c7e0b5bf
TI		 2022static int snd_seq_ioctl_query_subs(struct snd_seq_client *client,
2023 void __user *arg)
1da177e4
LT		 2024{
2025 int result = -ENXIO;
c7e0b5bf
TI		 2026 struct snd_seq_client *cptr = NULL;
2027 struct snd_seq_client_port *port = NULL;
2028 struct snd_seq_query_subs subs;
2029 struct snd_seq_port_subs_info *group;
1da177e4
LT		 2030 struct list_head *p;
2031 int i;
2032
2033 if (copy_from_user(&subs, arg, sizeof(subs)))
2034 return -EFAULT;
2035
2036 if ((cptr = snd_seq_client_use_ptr(subs.root.client)) == NULL)
2037 goto __end;
2038 if ((port = snd_seq_port_use_ptr(cptr, subs.root.port)) == NULL)
2039 goto __end;
2040
2041 switch (subs.type) {
2042 case SNDRV_SEQ_QUERY_SUBS_READ:
2043 group = &port->c_src;
2044 break;
2045 case SNDRV_SEQ_QUERY_SUBS_WRITE:
2046 group = &port->c_dest;
2047 break;
2048 default:
2049 goto __end;
2050 }
2051
2052 down_read(&group->list_mutex);
2053 /* search for the subscriber */
2054 subs.num_subs = group->count;
2055 i = 0;
2056 result = -ENOENT;
2057 list_for_each(p, &group->list_head) {
2058 if (i++ == subs.index) {
2059 /* found! */
c7e0b5bf 2060 struct snd_seq_subscribers *s;
1da177e4 2061 if (subs.type == SNDRV_SEQ_QUERY_SUBS_READ) {
c7e0b5bf 2062 s = list_entry(p, struct snd_seq_subscribers, src_list);
1da177e4
LT		 2063 subs.addr = s->info.dest;
2064 } else {
c7e0b5bf 2065 s = list_entry(p, struct snd_seq_subscribers, dest_list);
1da177e4
LT		 2066 subs.addr = s->info.sender;
2067 }
2068 subs.flags = s->info.flags;
2069 subs.queue = s->info.queue;
2070 result = 0;
2071 break;
2072 }
2073 }
2074 up_read(&group->list_mutex);
2075
2076 __end:
2077 if (port)
2078 snd_seq_port_unlock(port);
2079 if (cptr)
2080 snd_seq_client_unlock(cptr);
2081 if (result >= 0) {
2082 if (copy_to_user(arg, &subs, sizeof(subs)))
2083 return -EFAULT;
2084 }
2085 return result;
2086}
2087
2088
2089/*
2090 * query next client
2091 */
c7e0b5bf
TI		 2092static int snd_seq_ioctl_query_next_client(struct snd_seq_client *client,
2093 void __user *arg)
1da177e4 2094{
c7e0b5bf
TI		 2095 struct snd_seq_client *cptr = NULL;
2096 struct snd_seq_client_info info;
1da177e4
LT		 2097
2098 if (copy_from_user(&info, arg, sizeof(info)))
2099 return -EFAULT;
2100
2101 /* search for next client */
2102 info.client++;
2103 if (info.client < 0)
2104 info.client = 0;
2105 for (; info.client < SNDRV_SEQ_MAX_CLIENTS; info.client++) {
2106 cptr = snd_seq_client_use_ptr(info.client);
2107 if (cptr)
2108 break; /* found */
2109 }
2110 if (cptr == NULL)
2111 return -ENOENT;
2112
2113 get_client_info(cptr, &info);
2114 snd_seq_client_unlock(cptr);
2115
2116 if (copy_to_user(arg, &info, sizeof(info)))
2117 return -EFAULT;
2118 return 0;
2119}
2120
2121/*
2122 * query next port
2123 */
c7e0b5bf
TI		 2124static int snd_seq_ioctl_query_next_port(struct snd_seq_client *client,
2125 void __user *arg)
1da177e4 2126{
c7e0b5bf
TI		 2127 struct snd_seq_client *cptr;
2128 struct snd_seq_client_port *port = NULL;
2129 struct snd_seq_port_info info;
1da177e4
LT		 2130
2131 if (copy_from_user(&info, arg, sizeof(info)))
2132 return -EFAULT;
2133 cptr = snd_seq_client_use_ptr(info.addr.client);
2134 if (cptr == NULL)
2135 return -ENXIO;
2136
2137 /* search for next port */
2138 info.addr.port++;
2139 port = snd_seq_port_query_nearest(cptr, &info);
2140 if (port == NULL) {
2141 snd_seq_client_unlock(cptr);
2142 return -ENOENT;
2143 }
2144
2145 /* get port info */
2146 info.addr = port->addr;
2147 snd_seq_get_port_info(port, &info);
2148 snd_seq_port_unlock(port);
2149 snd_seq_client_unlock(cptr);
2150
2151 if (copy_to_user(arg, &info, sizeof(info)))
2152 return -EFAULT;
2153 return 0;
2154}
2155
2156/* -------------------------------------------------------- */
2157
2158static struct seq_ioctl_table {
2159 unsigned int cmd;
c7e0b5bf 2160 int (*func)(struct snd_seq_client *client, void __user * arg);
1da177e4
LT		 2161} ioctl_tables[] = {
2162 { SNDRV_SEQ_IOCTL_SYSTEM_INFO, snd_seq_ioctl_system_info },
2163 { SNDRV_SEQ_IOCTL_RUNNING_MODE, snd_seq_ioctl_running_mode },
2164 { SNDRV_SEQ_IOCTL_GET_CLIENT_INFO, snd_seq_ioctl_get_client_info },
2165 { SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, snd_seq_ioctl_set_client_info },
2166 { SNDRV_SEQ_IOCTL_CREATE_PORT, snd_seq_ioctl_create_port },
2167 { SNDRV_SEQ_IOCTL_DELETE_PORT, snd_seq_ioctl_delete_port },
2168 { SNDRV_SEQ_IOCTL_GET_PORT_INFO, snd_seq_ioctl_get_port_info },
2169 { SNDRV_SEQ_IOCTL_SET_PORT_INFO, snd_seq_ioctl_set_port_info },
2170 { SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, snd_seq_ioctl_subscribe_port },
2171 { SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, snd_seq_ioctl_unsubscribe_port },
2172 { SNDRV_SEQ_IOCTL_CREATE_QUEUE, snd_seq_ioctl_create_queue },
2173 { SNDRV_SEQ_IOCTL_DELETE_QUEUE, snd_seq_ioctl_delete_queue },
2174 { SNDRV_SEQ_IOCTL_GET_QUEUE_INFO, snd_seq_ioctl_get_queue_info },
2175 { SNDRV_SEQ_IOCTL_SET_QUEUE_INFO, snd_seq_ioctl_set_queue_info },
2176 { SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE, snd_seq_ioctl_get_named_queue },
2177 { SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS, snd_seq_ioctl_get_queue_status },
2178 { SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO, snd_seq_ioctl_get_queue_tempo },
2179 { SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO, snd_seq_ioctl_set_queue_tempo },
2180 { SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER, snd_seq_ioctl_get_queue_timer },
2181 { SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER, snd_seq_ioctl_set_queue_timer },
2182 { SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT, snd_seq_ioctl_get_queue_client },
2183 { SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT, snd_seq_ioctl_set_queue_client },
2184 { SNDRV_SEQ_IOCTL_GET_CLIENT_POOL, snd_seq_ioctl_get_client_pool },
2185 { SNDRV_SEQ_IOCTL_SET_CLIENT_POOL, snd_seq_ioctl_set_client_pool },
2186 { SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION, snd_seq_ioctl_get_subscription },
2187 { SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT, snd_seq_ioctl_query_next_client },
2188 { SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, snd_seq_ioctl_query_next_port },
2189 { SNDRV_SEQ_IOCTL_REMOVE_EVENTS, snd_seq_ioctl_remove_events },
2190 { SNDRV_SEQ_IOCTL_QUERY_SUBS, snd_seq_ioctl_query_subs },
2191 { 0, NULL },
2192};
2193
c7e0b5bf
TI		 2194static int snd_seq_do_ioctl(struct snd_seq_client *client, unsigned int cmd,
2195 void __user *arg)
1da177e4
LT		 2196{
2197 struct seq_ioctl_table *p;
2198
2199 switch (cmd) {
2200 case SNDRV_SEQ_IOCTL_PVERSION:
2201 /* return sequencer version number */
2202 return put_user(SNDRV_SEQ_VERSION, (int __user *)arg) ? -EFAULT : 0;
2203 case SNDRV_SEQ_IOCTL_CLIENT_ID:
2204 /* return the id of this client */
2205 return put_user(client->number, (int __user *)arg) ? -EFAULT : 0;
2206 }
2207
2208 if (! arg)
2209 return -EFAULT;
2210 for (p = ioctl_tables; p->cmd; p++) {
2211 if (p->cmd == cmd)
2212 return p->func(client, arg);
2213 }
04cc79a0 2214 pr_debug("ALSA: seq unknown ioctl() 0x%x (type='%c', number=0x%02x)\n",
1da177e4
LT		 2215 cmd, _IOC_TYPE(cmd), _IOC_NR(cmd));
2216 return -ENOTTY;
2217}
2218
2219
2220static long snd_seq_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2221{
c7e0b5bf 2222 struct snd_seq_client *client = file->private_data;
1da177e4 2223
7eaa943c
TI		 2224 if (snd_BUG_ON(!client))
2225 return -ENXIO;
1da177e4
LT		 2226
2227 return snd_seq_do_ioctl(client, cmd, (void __user *) arg);
2228}
2229
2230#ifdef CONFIG_COMPAT
2231#include "seq_compat.c"
2232#else
2233#define snd_seq_ioctl_compat NULL
2234#endif
2235
2236/* -------------------------------------------------------- */
2237
2238
2239/* exported to kernel modules */
7b6d9245
CL		 2240int snd_seq_create_kernel_client(struct snd_card *card, int client_index,
2241 const char *name_fmt, ...)
1da177e4 2242{
c7e0b5bf 2243 struct snd_seq_client *client;
7b6d9245 2244 va_list args;
1da177e4 2245
7eaa943c
TI		 2246 if (snd_BUG_ON(in_interrupt()))
2247 return -EBUSY;
1da177e4 2248
aa1e77e6 2249 if (card && client_index >= SNDRV_SEQ_CLIENTS_PER_CARD)
1da177e4 2250 return -EINVAL;
aa1e77e6 2251 if (card == NULL && client_index >= SNDRV_SEQ_GLOBAL_CLIENTS)
1da177e4 2252 return -EINVAL;
1da177e4 2253
1a60d4c5 2254 if (mutex_lock_interruptible(&register_mutex))
1da177e4 2255 return -ERESTARTSYS;
d001544d
CL		 2256
2257 if (card) {
aa1e77e6
CL		 2258 client_index += SNDRV_SEQ_GLOBAL_CLIENTS
2259 + card->number * SNDRV_SEQ_CLIENTS_PER_CARD;
2260 if (client_index >= SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN)
d001544d
CL		 2261 client_index = -1;
2262 }
2263
1da177e4 2264 /* empty write queue as default */
aa1e77e6 2265 client = seq_create_client1(client_index, 0);
1da177e4 2266 if (client == NULL) {
1a60d4c5 2267 mutex_unlock(&register_mutex);
1da177e4
LT		 2268 return -EBUSY; /* failure code */
2269 }
2270 usage_alloc(&client_usage, 1);
2271
83e8ad69
CL		 2272 client->accept_input = 1;
2273 client->accept_output = 1;
1da177e4 2274
7b6d9245
CL		 2275 va_start(args, name_fmt);
2276 vsnprintf(client->name, sizeof(client->name), name_fmt, args);
2277 va_end(args);
1da177e4
LT		 2278
2279 client->type = KERNEL_CLIENT;
1a60d4c5 2280 mutex_unlock(&register_mutex);
1da177e4
LT		 2281
2282 /* make others aware this new client */
2283 snd_seq_system_client_ev_client_start(client->number);
2284
2285 /* return client number to caller */
2286 return client->number;
2287}
2288
91715ed9
TI		 2289EXPORT_SYMBOL(snd_seq_create_kernel_client);
2290
1da177e4
LT		 2291/* exported to kernel modules */
2292int snd_seq_delete_kernel_client(int client)
2293{
c7e0b5bf 2294 struct snd_seq_client *ptr;
1da177e4 2295
7eaa943c
TI		 2296 if (snd_BUG_ON(in_interrupt()))
2297 return -EBUSY;
1da177e4
LT		 2298
2299 ptr = clientptr(client);
2300 if (ptr == NULL)
2301 return -EINVAL;
2302
2303 seq_free_client(ptr);
2304 kfree(ptr);
2305 return 0;
2306}
2307
91715ed9 2308EXPORT_SYMBOL(snd_seq_delete_kernel_client);
1da177e4
LT		 2309
2310/* skeleton to enqueue event, called from snd_seq_kernel_client_enqueue
2311 * and snd_seq_kernel_client_enqueue_blocking
2312 */
c7e0b5bf 2313static int kernel_client_enqueue(int client, struct snd_seq_event *ev,
1da177e4
LT		 2314 struct file *file, int blocking,
2315 int atomic, int hop)
2316{
c7e0b5bf 2317 struct snd_seq_client *cptr;
1da177e4
LT		 2318 int result;
2319
7eaa943c
TI		 2320 if (snd_BUG_ON(!ev))
2321 return -EINVAL;
1da177e4
LT		 2322
2323 if (ev->type == SNDRV_SEQ_EVENT_NONE)
2324 return 0; /* ignore this */
2325 if (ev->type == SNDRV_SEQ_EVENT_KERNEL_ERROR)
2326 return -EINVAL; /* quoted events can't be enqueued */
2327
2328 /* fill in client number */
2329 ev->source.client = client;
2330
2331 if (check_event_type_and_length(ev))
2332 return -EINVAL;
2333
2334 cptr = snd_seq_client_use_ptr(client);
2335 if (cptr == NULL)
2336 return -EINVAL;
2337
2338 if (! cptr->accept_output)
2339 result = -EPERM;
2340 else /* send it */
2341 result = snd_seq_client_enqueue_event(cptr, ev, file, blocking, atomic, hop);
2342
2343 snd_seq_client_unlock(cptr);
2344 return result;
2345}
2346
2347/*
2348 * exported, called by kernel clients to enqueue events (w/o blocking)
2349 *
2350 * RETURN VALUE: zero if succeed, negative if error
2351 */
c7e0b5bf 2352int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event * ev,
1da177e4
LT		 2353 int atomic, int hop)
2354{
2355 return kernel_client_enqueue(client, ev, NULL, 0, atomic, hop);
2356}
2357
91715ed9
TI		 2358EXPORT_SYMBOL(snd_seq_kernel_client_enqueue);
2359
1da177e4
LT		 2360/*
2361 * exported, called by kernel clients to enqueue events (with blocking)
2362 *
2363 * RETURN VALUE: zero if succeed, negative if error
2364 */
c7e0b5bf 2365int snd_seq_kernel_client_enqueue_blocking(int client, struct snd_seq_event * ev,
1da177e4
LT		 2366 struct file *file,
2367 int atomic, int hop)
2368{
2369 return kernel_client_enqueue(client, ev, file, 1, atomic, hop);
2370}
2371
91715ed9 2372EXPORT_SYMBOL(snd_seq_kernel_client_enqueue_blocking);
1da177e4
LT		 2373
2374/*
2375 * exported, called by kernel clients to dispatch events directly to other
2376 * clients, bypassing the queues. Event time-stamp will be updated.
2377 *
2378 * RETURN VALUE: negative = delivery failed,
2379 * zero, or positive: the number of delivered events
2380 */
c7e0b5bf 2381int snd_seq_kernel_client_dispatch(int client, struct snd_seq_event * ev,
1da177e4
LT		 2382 int atomic, int hop)
2383{
c7e0b5bf 2384 struct snd_seq_client *cptr;
1da177e4
LT		 2385 int result;
2386
7eaa943c
TI		 2387 if (snd_BUG_ON(!ev))
2388 return -EINVAL;
1da177e4
LT		 2389
2390 /* fill in client number */
2391 ev->queue = SNDRV_SEQ_QUEUE_DIRECT;
2392 ev->source.client = client;
2393
2394 if (check_event_type_and_length(ev))
2395 return -EINVAL;
2396
2397 cptr = snd_seq_client_use_ptr(client);
2398 if (cptr == NULL)
2399 return -EINVAL;
2400
2401 if (!cptr->accept_output)
2402 result = -EPERM;
2403 else
2404 result = snd_seq_deliver_event(cptr, ev, atomic, hop);
2405
2406 snd_seq_client_unlock(cptr);
2407 return result;
2408}
2409
91715ed9 2410EXPORT_SYMBOL(snd_seq_kernel_client_dispatch);
1da177e4
LT		 2411
2412/*
2413 * exported, called by kernel clients to perform same functions as with
2414 * userland ioctl()
2415 */
2416int snd_seq_kernel_client_ctl(int clientid, unsigned int cmd, void *arg)
2417{
c7e0b5bf 2418 struct snd_seq_client *client;
1da177e4
LT		 2419 mm_segment_t fs;
2420 int result;
2421
2422 client = clientptr(clientid);
2423 if (client == NULL)
2424 return -ENXIO;
2425 fs = snd_enter_user();
fea952e5 2426 result = snd_seq_do_ioctl(client, cmd, (void __force __user *)arg);
1da177e4
LT		 2427 snd_leave_user(fs);
2428 return result;
2429}
2430
91715ed9 2431EXPORT_SYMBOL(snd_seq_kernel_client_ctl);
1da177e4
LT		 2432
2433/* exported (for OSS emulator) */
2434int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait)
2435{
c7e0b5bf 2436 struct snd_seq_client *client;
1da177e4
LT		 2437
2438 client = clientptr(clientid);
2439 if (client == NULL)
2440 return -ENXIO;
2441
2442 if (! snd_seq_write_pool_allocated(client))
2443 return 1;
2444 if (snd_seq_pool_poll_wait(client->pool, file, wait))
2445 return 1;
2446 return 0;
2447}
2448
91715ed9
TI		 2449EXPORT_SYMBOL(snd_seq_kernel_client_write_poll);
2450
1da177e4
LT		 2451/*---------------------------------------------------------------------------*/
2452
cd6a6503 2453#ifdef CONFIG_SND_PROC_FS
1da177e4
LT		 2454/*
2455 * /proc interface
2456 */
c7e0b5bf
TI		 2457static void snd_seq_info_dump_subscribers(struct snd_info_buffer *buffer,
2458 struct snd_seq_port_subs_info *group,
2459 int is_src, char *msg)
1da177e4
LT		 2460{
2461 struct list_head *p;
c7e0b5bf 2462 struct snd_seq_subscribers *s;
1da177e4
LT		 2463 int count = 0;
2464
2465 down_read(&group->list_mutex);
2466 if (list_empty(&group->list_head)) {
2467 up_read(&group->list_mutex);
2468 return;
2469 }
2470 snd_iprintf(buffer, msg);
2471 list_for_each(p, &group->list_head) {
2472 if (is_src)
c7e0b5bf 2473 s = list_entry(p, struct snd_seq_subscribers, src_list);
1da177e4 2474 else
c7e0b5bf 2475 s = list_entry(p, struct snd_seq_subscribers, dest_list);
1da177e4
LT		 2476 if (count++)
2477 snd_iprintf(buffer, ", ");
2478 snd_iprintf(buffer, "%d:%d",
2479 is_src ? s->info.dest.client : s->info.sender.client,
2480 is_src ? s->info.dest.port : s->info.sender.port);
2481 if (s->info.flags & SNDRV_SEQ_PORT_SUBS_TIMESTAMP)
2482 snd_iprintf(buffer, "[%c:%d]", ((s->info.flags & SNDRV_SEQ_PORT_SUBS_TIME_REAL) ? 'r' : 't'), s->info.queue);
2483 if (group->exclusive)
2484 snd_iprintf(buffer, "[ex]");
2485 }
2486 up_read(&group->list_mutex);
2487 snd_iprintf(buffer, "\n");
2488}
2489
2490#define FLAG_PERM_RD(perm) ((perm) & SNDRV_SEQ_PORT_CAP_READ ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_READ ? 'R' : 'r') : '-')
2491#define FLAG_PERM_WR(perm) ((perm) & SNDRV_SEQ_PORT_CAP_WRITE ? ((perm) & SNDRV_SEQ_PORT_CAP_SUBS_WRITE ? 'W' : 'w') : '-')
2492#define FLAG_PERM_EX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_NO_EXPORT ? '-' : 'e')
2493
2494#define FLAG_PERM_DUPLEX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_DUPLEX ? 'X' : '-')
2495
c7e0b5bf
TI		 2496static void snd_seq_info_dump_ports(struct snd_info_buffer *buffer,
2497 struct snd_seq_client *client)
1da177e4 2498{
9244b2c3 2499 struct snd_seq_client_port *p;
1da177e4 2500
1a60d4c5 2501 mutex_lock(&client->ports_mutex);
9244b2c3 2502 list_for_each_entry(p, &client->ports_list_head, list) {
1da177e4
LT		 2503 snd_iprintf(buffer, " Port %3d : \"%s\" (%c%c%c%c)\n",
2504 p->addr.port, p->name,
2505 FLAG_PERM_RD(p->capability),
2506 FLAG_PERM_WR(p->capability),
2507 FLAG_PERM_EX(p->capability),
2508 FLAG_PERM_DUPLEX(p->capability));
2509 snd_seq_info_dump_subscribers(buffer, &p->c_src, 1, " Connecting To: ");
2510 snd_seq_info_dump_subscribers(buffer, &p->c_dest, 0, " Connected From: ");
2511 }
1a60d4c5 2512 mutex_unlock(&client->ports_mutex);
1da177e4
LT		 2513}
2514
2515
2516/* exported to seq_info.c */
c7e0b5bf
TI		 2517void snd_seq_info_clients_read(struct snd_info_entry *entry,
2518 struct snd_info_buffer *buffer)
1da177e4 2519{
1da177e4 2520 int c;
c7e0b5bf 2521 struct snd_seq_client *client;
1da177e4
LT		 2522
2523 snd_iprintf(buffer, "Client info\n");
2524 snd_iprintf(buffer, " cur clients : %d\n", client_usage.cur);
2525 snd_iprintf(buffer, " peak clients : %d\n", client_usage.peak);
2526 snd_iprintf(buffer, " max clients : %d\n", SNDRV_SEQ_MAX_CLIENTS);
2527 snd_iprintf(buffer, "\n");
2528
2529 /* list the client table */
2530 for (c = 0; c < SNDRV_SEQ_MAX_CLIENTS; c++) {
2531 client = snd_seq_client_use_ptr(c);
2532 if (client == NULL)
2533 continue;
2534 if (client->type == NO_CLIENT) {
2535 snd_seq_client_unlock(client);
2536 continue;
2537 }
2538
2539 snd_iprintf(buffer, "Client %3d : \"%s\" [%s]\n",
2540 c, client->name,
2541 client->type == USER_CLIENT ? "User" : "Kernel");
2542 snd_seq_info_dump_ports(buffer, client);
2543 if (snd_seq_write_pool_allocated(client)) {
2544 snd_iprintf(buffer, " Output pool :\n");
2545 snd_seq_info_pool(buffer, client->pool, " ");
2546 }
2547 if (client->type == USER_CLIENT && client->data.user.fifo &&
2548 client->data.user.fifo->pool) {
2549 snd_iprintf(buffer, " Input pool :\n");
2550 snd_seq_info_pool(buffer, client->data.user.fifo->pool, " ");
2551 }
2552 snd_seq_client_unlock(client);
2553 }
2554}
cd6a6503 2555#endif /* CONFIG_SND_PROC_FS */
1da177e4
LT		 2556
2557/*---------------------------------------------------------------------------*/
2558
2559
2560/*
2561 * REGISTRATION PART
2562 */
2563
9c2e08c5 2564static const struct file_operations snd_seq_f_ops =
1da177e4
LT		 2565{
2566 .owner = THIS_MODULE,
2567 .read = snd_seq_read,
2568 .write = snd_seq_write,
2569 .open = snd_seq_open,
2570 .release = snd_seq_release,
02f4865f 2571 .llseek = no_llseek,
1da177e4
LT		 2572 .poll = snd_seq_poll,
2573 .unlocked_ioctl = snd_seq_ioctl,
2574 .compat_ioctl = snd_seq_ioctl_compat,
2575};
2576
5205388d
TI		 2577static struct device seq_dev;
2578
1da177e4
LT		 2579/*
2580 * register sequencer device
2581 */
2582int __init snd_sequencer_device_init(void)
2583{
2584 int err;
2585
5205388d
TI		 2586 snd_device_initialize(&seq_dev, NULL);
2587 dev_set_name(&seq_dev, "seq");
2588
1a60d4c5 2589 if (mutex_lock_interruptible(&register_mutex))
1da177e4
LT		 2590 return -ERESTARTSYS;
2591
40a4b263
TI		 2592 err = snd_register_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0,
2593 &snd_seq_f_ops, NULL, &seq_dev);
5205388d 2594 if (err < 0) {
1a60d4c5 2595 mutex_unlock(&register_mutex);
5205388d 2596 put_device(&seq_dev);
1da177e4
LT		 2597 return err;
2598 }
2599
1a60d4c5 2600 mutex_unlock(&register_mutex);
1da177e4
LT		 2601
2602 return 0;
2603}
2604
2605
2606
2607/*
2608 * unregister sequencer device
2609 */
2610void __exit snd_sequencer_device_done(void)
2611{
40a4b263 2612 snd_unregister_device(&seq_dev);
5205388d 2613 put_device(&seq_dev);
1da177e4 2614}
Linux kernel - Deliverables
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