1 /*
2 * Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <dev/sound/pcm/sound.h>
28
29 #include "feeder_if.h"
30
31 SND_DECLARE_FILE("$FreeBSD: releng/5.1/sys/dev/sound/pcm/buffer.c 113752 2003-04-20 17:08:56Z orion $");
32
33 struct snd_dbuf *
34 sndbuf_create(device_t dev, char *drv, char *desc)
35 {
36 struct snd_dbuf *b;
37
38 b = malloc(sizeof(*b), M_DEVBUF, M_WAITOK | M_ZERO);
39 snprintf(b->name, SNDBUF_NAMELEN, "%s:%s", drv, desc);
40 b->dev = dev;
41
42 return b;
43 }
44
45 void
46 sndbuf_destroy(struct snd_dbuf *b)
47 {
48 free(b, M_DEVBUF);
49 }
50
51 bus_addr_t
52 sndbuf_getbufaddr(struct snd_dbuf *buf)
53 {
54 return (buf->buf_addr);
55 }
56
57 static void
58 sndbuf_setmap(void *arg, bus_dma_segment_t *segs, int nseg, int error)
59 {
60 struct snd_dbuf *b = (struct snd_dbuf *)arg;
61
62 if (bootverbose) {
63 device_printf(b->dev, "sndbuf_setmap %lx, %lx; ", (unsigned long)segs->ds_addr,
64 (unsigned long)segs->ds_len);
65 printf("%p -> %lx\n", b->buf, (unsigned long)vtophys(b->buf));
66 }
67 b->buf_addr = segs->ds_addr;
68 }
69
70 /*
71 * Allocate memory for DMA buffer. If the device does not use DMA transfers,
72 * the driver can call malloc(9) and sndbuf_setup() itself.
73 */
74
75 int
76 sndbuf_alloc(struct snd_dbuf *b, bus_dma_tag_t dmatag, unsigned int size)
77 {
78 b->dmatag = dmatag;
79 b->maxsize = size;
80 b->bufsize = b->maxsize;
81 if (bus_dmamem_alloc(b->dmatag, (void **)&b->buf, BUS_DMA_NOWAIT, &b->dmamap))
82 return ENOSPC;
83 if (bus_dmamap_load(b->dmatag, b->dmamap, b->buf, b->maxsize, sndbuf_setmap, b, 0))
84 return ENOSPC;
85 return sndbuf_resize(b, 2, b->maxsize / 2);
86 }
87
88 int
89 sndbuf_setup(struct snd_dbuf *b, void *buf, unsigned int size)
90 {
91 b->buf = buf;
92 b->maxsize = size;
93 b->bufsize = b->maxsize;
94 return sndbuf_resize(b, 2, b->maxsize / 2);
95 }
96
97 void
98 sndbuf_free(struct snd_dbuf *b)
99 {
100 if (b->tmpbuf)
101 free(b->tmpbuf, M_DEVBUF);
102 b->tmpbuf = NULL;
103
104 if (b->dmamap)
105 bus_dmamap_unload(b->dmatag, b->dmamap);
106
107 if (b->dmamap && b->buf)
108 bus_dmamem_free(b->dmatag, b->buf, b->dmamap);
109 b->dmamap = NULL;
110 b->buf = NULL;
111 }
112
113 int
114 sndbuf_resize(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz)
115 {
116 u_int8_t *tmpbuf;
117 if (b->maxsize == 0)
118 return 0;
119 if (blkcnt == 0)
120 blkcnt = b->blkcnt;
121 if (blksz == 0)
122 blksz = b->blksz;
123 if (blkcnt < 2 || blksz < 16 || (blkcnt * blksz > b->maxsize))
124 return EINVAL;
125 if (blkcnt == b->blkcnt && blksz == b->blksz)
126 return 0;
127 b->blkcnt = blkcnt;
128 b->blksz = blksz;
129 b->bufsize = blkcnt * blksz;
130
131 tmpbuf = malloc(b->bufsize, M_DEVBUF, M_NOWAIT);
132 if (tmpbuf == NULL)
133 return ENOMEM;
134 free(b->tmpbuf, M_DEVBUF);
135 b->tmpbuf = tmpbuf;
136 sndbuf_reset(b);
137 return 0;
138 }
139
140 int
141 sndbuf_remalloc(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz)
142 {
143 u_int8_t *buf, *tmpbuf, *f1, *f2;
144 unsigned int bufsize;
145
146 if (blkcnt < 2 || blksz < 16)
147 return EINVAL;
148
149 bufsize = blksz * blkcnt;
150
151 buf = malloc(bufsize, M_DEVBUF, M_NOWAIT);
152 if (buf == NULL)
153 return ENOMEM;
154
155 tmpbuf = malloc(bufsize, M_DEVBUF, M_NOWAIT);
156 if (tmpbuf == NULL) {
157 free(buf, M_DEVBUF);
158 return ENOMEM;
159 }
160
161 b->blkcnt = blkcnt;
162 b->blksz = blksz;
163 b->bufsize = bufsize;
164 b->maxsize = bufsize;
165 f1 = b->buf;
166 f2 = b->tmpbuf;
167 b->buf = buf;
168 b->tmpbuf = tmpbuf;
169
170 if (f1)
171 free(f1, M_DEVBUF);
172 if (f2)
173 free(f2, M_DEVBUF);
174
175 sndbuf_reset(b);
176 return 0;
177 }
178
179 void
180 sndbuf_clear(struct snd_dbuf *b, unsigned int length)
181 {
182 int i;
183 u_char data, *p;
184
185 if (length == 0)
186 return;
187 if (length > b->bufsize)
188 length = b->bufsize;
189
190 if (b->fmt & AFMT_SIGNED)
191 data = 0x00;
192 else
193 data = 0x80;
194
195 i = sndbuf_getfreeptr(b);
196 p = sndbuf_getbuf(b);
197 while (length > 0) {
198 p[i] = data;
199 length--;
200 i++;
201 if (i >= b->bufsize)
202 i = 0;
203 }
204 }
205
206 void
207 sndbuf_fillsilence(struct snd_dbuf *b)
208 {
209 int i;
210 u_char data, *p;
211
212 if (b->fmt & AFMT_SIGNED)
213 data = 0x00;
214 else
215 data = 0x80;
216
217 i = 0;
218 p = sndbuf_getbuf(b);
219 while (i < b->bufsize)
220 p[i++] = data;
221 b->rp = 0;
222 b->rl = b->bufsize;
223 }
224
225 void
226 sndbuf_reset(struct snd_dbuf *b)
227 {
228 b->hp = 0;
229 b->rp = 0;
230 b->rl = 0;
231 b->dl = 0;
232 b->prev_total = 0;
233 b->total = 0;
234 b->xrun = 0;
235 if (b->buf && b->bufsize > 0)
236 sndbuf_clear(b, b->bufsize);
237 }
238
239 u_int32_t
240 sndbuf_getfmt(struct snd_dbuf *b)
241 {
242 return b->fmt;
243 }
244
245 int
246 sndbuf_setfmt(struct snd_dbuf *b, u_int32_t fmt)
247 {
248 b->fmt = fmt;
249 b->bps = 1;
250 b->bps <<= (b->fmt & AFMT_STEREO)? 1 : 0;
251 b->bps <<= (b->fmt & AFMT_16BIT)? 1 : 0;
252 b->bps <<= (b->fmt & AFMT_32BIT)? 2 : 0;
253 return 0;
254 }
255
256 unsigned int
257 sndbuf_getspd(struct snd_dbuf *b)
258 {
259 return b->spd;
260 }
261
262 void
263 sndbuf_setspd(struct snd_dbuf *b, unsigned int spd)
264 {
265 b->spd = spd;
266 }
267
268 unsigned int
269 sndbuf_getalign(struct snd_dbuf *b)
270 {
271 static int align[] = {0, 1, 1, 2, 2, 2, 2, 3};
272
273 return align[b->bps - 1];
274 }
275
276 unsigned int
277 sndbuf_getblkcnt(struct snd_dbuf *b)
278 {
279 return b->blkcnt;
280 }
281
282 void
283 sndbuf_setblkcnt(struct snd_dbuf *b, unsigned int blkcnt)
284 {
285 b->blkcnt = blkcnt;
286 }
287
288 unsigned int
289 sndbuf_getblksz(struct snd_dbuf *b)
290 {
291 return b->blksz;
292 }
293
294 void
295 sndbuf_setblksz(struct snd_dbuf *b, unsigned int blksz)
296 {
297 b->blksz = blksz;
298 }
299
300 unsigned int
301 sndbuf_getbps(struct snd_dbuf *b)
302 {
303 return b->bps;
304 }
305
306 void *
307 sndbuf_getbuf(struct snd_dbuf *b)
308 {
309 return b->buf;
310 }
311
312 void *
313 sndbuf_getbufofs(struct snd_dbuf *b, unsigned int ofs)
314 {
315 KASSERT(ofs < b->bufsize, ("%s: ofs invalid %d", __func__, ofs));
316
317 return b->buf + ofs;
318 }
319
320 unsigned int
321 sndbuf_getsize(struct snd_dbuf *b)
322 {
323 return b->bufsize;
324 }
325
326 unsigned int
327 sndbuf_getmaxsize(struct snd_dbuf *b)
328 {
329 return b->maxsize;
330 }
331
332 unsigned int
333 sndbuf_runsz(struct snd_dbuf *b)
334 {
335 return b->dl;
336 }
337
338 void
339 sndbuf_setrun(struct snd_dbuf *b, int go)
340 {
341 b->dl = go? b->blksz : 0;
342 }
343
344 struct selinfo *
345 sndbuf_getsel(struct snd_dbuf *b)
346 {
347 return &b->sel;
348 }
349
350 /************************************************************/
351 unsigned int
352 sndbuf_getxrun(struct snd_dbuf *b)
353 {
354 SNDBUF_LOCKASSERT(b);
355
356 return b->xrun;
357 }
358
359 void
360 sndbuf_setxrun(struct snd_dbuf *b, unsigned int cnt)
361 {
362 SNDBUF_LOCKASSERT(b);
363
364 b->xrun = cnt;
365 }
366
367 unsigned int
368 sndbuf_gethwptr(struct snd_dbuf *b)
369 {
370 SNDBUF_LOCKASSERT(b);
371
372 return b->hp;
373 }
374
375 void
376 sndbuf_sethwptr(struct snd_dbuf *b, unsigned int ptr)
377 {
378 SNDBUF_LOCKASSERT(b);
379
380 b->hp = ptr;
381 }
382
383 unsigned int
384 sndbuf_getready(struct snd_dbuf *b)
385 {
386 SNDBUF_LOCKASSERT(b);
387 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
388
389 return b->rl;
390 }
391
392 unsigned int
393 sndbuf_getreadyptr(struct snd_dbuf *b)
394 {
395 SNDBUF_LOCKASSERT(b);
396 KASSERT((b->rp >= 0) && (b->rp <= b->bufsize), ("%s: b->rp invalid %d", __func__, b->rp));
397
398 return b->rp;
399 }
400
401 unsigned int
402 sndbuf_getfree(struct snd_dbuf *b)
403 {
404 SNDBUF_LOCKASSERT(b);
405 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
406
407 return b->bufsize - b->rl;
408 }
409
410 unsigned int
411 sndbuf_getfreeptr(struct snd_dbuf *b)
412 {
413 SNDBUF_LOCKASSERT(b);
414 KASSERT((b->rp >= 0) && (b->rp <= b->bufsize), ("%s: b->rp invalid %d", __func__, b->rp));
415 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
416
417 return (b->rp + b->rl) % b->bufsize;
418 }
419
420 unsigned int
421 sndbuf_getblocks(struct snd_dbuf *b)
422 {
423 SNDBUF_LOCKASSERT(b);
424
425 return b->total / b->blksz;
426 }
427
428 unsigned int
429 sndbuf_getprevblocks(struct snd_dbuf *b)
430 {
431 SNDBUF_LOCKASSERT(b);
432
433 return b->prev_total / b->blksz;
434 }
435
436 unsigned int
437 sndbuf_gettotal(struct snd_dbuf *b)
438 {
439 SNDBUF_LOCKASSERT(b);
440
441 return b->total;
442 }
443
444 void
445 sndbuf_updateprevtotal(struct snd_dbuf *b)
446 {
447 SNDBUF_LOCKASSERT(b);
448
449 b->prev_total = b->total;
450 }
451
452 /************************************************************/
453
454 int
455 sndbuf_acquire(struct snd_dbuf *b, u_int8_t *from, unsigned int count)
456 {
457 int l;
458
459 KASSERT(count <= sndbuf_getfree(b), ("%s: count %d > free %d", __func__, count, sndbuf_getfree(b)));
460 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
461 b->total += count;
462 if (from != NULL) {
463 while (count > 0) {
464 l = MIN(count, sndbuf_getsize(b) - sndbuf_getfreeptr(b));
465 bcopy(from, sndbuf_getbufofs(b, sndbuf_getfreeptr(b)), l);
466 from += l;
467 b->rl += l;
468 count -= l;
469 }
470 } else
471 b->rl += count;
472 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d, count %d", __func__, b->rl, count));
473
474 return 0;
475 }
476
477 int
478 sndbuf_dispose(struct snd_dbuf *b, u_int8_t *to, unsigned int count)
479 {
480 int l;
481
482 KASSERT(count <= sndbuf_getready(b), ("%s: count %d > ready %d", __func__, count, sndbuf_getready(b)));
483 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d", __func__, b->rl));
484 if (to != NULL) {
485 while (count > 0) {
486 l = MIN(count, sndbuf_getsize(b) - sndbuf_getreadyptr(b));
487 bcopy(sndbuf_getbufofs(b, sndbuf_getreadyptr(b)), to, l);
488 to += l;
489 b->rl -= l;
490 b->rp = (b->rp + l) % b->bufsize;
491 count -= l;
492 }
493 } else {
494 b->rl -= count;
495 b->rp = (b->rp + count) % b->bufsize;
496 }
497 KASSERT((b->rl >= 0) && (b->rl <= b->bufsize), ("%s: b->rl invalid %d, count %d", __func__, b->rl, count));
498
499 return 0;
500 }
501
502 int
503 sndbuf_uiomove(struct snd_dbuf *b, struct uio *uio, unsigned int count)
504 {
505 int x, c, p, rd, err;
506
507 err = 0;
508 rd = (uio->uio_rw == UIO_READ)? 1 : 0;
509 if (count > uio->uio_resid)
510 return EINVAL;
511
512 if (count > (rd? sndbuf_getready(b) : sndbuf_getfree(b))) {
513 return EINVAL;
514 }
515
516 while (err == 0 && count > 0) {
517 p = rd? sndbuf_getreadyptr(b) : sndbuf_getfreeptr(b);
518 c = MIN(count, sndbuf_getsize(b) - p);
519 x = uio->uio_resid;
520 err = uiomove(sndbuf_getbufofs(b, p), c, uio);
521 x -= uio->uio_resid;
522 count -= x;
523 x = rd? sndbuf_dispose(b, NULL, x) : sndbuf_acquire(b, NULL, x);
524 }
525
526 return 0;
527 }
528
529 /* count is number of bytes we want added to destination buffer */
530 int
531 sndbuf_feed(struct snd_dbuf *from, struct snd_dbuf *to, struct pcm_channel *channel, struct pcm_feeder *feeder, unsigned int count)
532 {
533 KASSERT(count > 0, ("can't feed 0 bytes"));
534
535 if (sndbuf_getfree(to) < count)
536 return EINVAL;
537
538 count = FEEDER_FEED(feeder, channel, to->tmpbuf, count, from);
539 if (count)
540 sndbuf_acquire(to, to->tmpbuf, count);
541 /* the root feeder has called sndbuf_dispose(from, , bytes fetched) */
542
543 return 0;
544 }
545
546 /************************************************************/
547
548 void
549 sndbuf_dump(struct snd_dbuf *b, char *s, u_int32_t what)
550 {
551 printf("%s: [", s);
552 if (what & 0x01)
553 printf(" bufsize: %d, maxsize: %d", b->bufsize, b->maxsize);
554 if (what & 0x02)
555 printf(" dl: %d, rp: %d, rl: %d, hp: %d", b->dl, b->rp, b->rl, b->hp);
556 if (what & 0x04)
557 printf(" total: %d, prev_total: %d, xrun: %d", b->total, b->prev_total, b->xrun);
558 if (what & 0x08)
559 printf(" fmt: 0x%x, spd: %d", b->fmt, b->spd);
560 if (what & 0x10)
561 printf(" blksz: %d, blkcnt: %d, flags: 0x%x", b->blksz, b->blkcnt, b->flags);
562 printf(" ]\n");
563 }
564
565 /************************************************************/
566 u_int32_t
567 sndbuf_getflags(struct snd_dbuf *b)
568 {
569 return b->flags;
570 }
571
572 void
573 sndbuf_setflags(struct snd_dbuf *b, u_int32_t flags, int on)
574 {
575 b->flags &= ~flags;
576 if (on)
577 b->flags |= flags;
578 }
579
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