2 * Copyright (c) 1999 Cameron Grant <cg@freebsd.org>
3 * Portions Copyright by Luigi Rizzo - 1997-99
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * $FreeBSD: src/sys/dev/sound/pcm/channel.c,v 1.99.2.5 2007/05/13 20:53:39 ariff Exp $
30 #include <dev/sound/pcm/sound.h>
31 #include <sys/vnode.h> /* IO_NDELAY */
33 #include "feeder_if.h"
35 SND_DECLARE_FILE("$DragonFly: src/sys/dev/sound/pcm/channel.c,v 1.15 2008/01/05 13:34:22 corecode Exp $");
37 #define MIN_CHUNK_SIZE 256 /* for uiomove etc. */
39 #define DMA_ALIGN_THRESHOLD 4
40 #define DMA_ALIGN_MASK (~(DMA_ALIGN_THRESHOLD - 1))
43 #define CANCHANGE(c) (!(c->flags & CHN_F_TRIGGERED))
49 static int chn_targetirqrate = 32;
50 TUNABLE_INT("hw.snd.targetirqrate", &chn_targetirqrate);
53 sysctl_hw_snd_targetirqrate(SYSCTL_HANDLER_ARGS)
57 val = chn_targetirqrate;
58 err = sysctl_handle_int(oidp, &val, sizeof(val), req);
59 if (val < 16 || val > 512)
62 chn_targetirqrate = val;
66 SYSCTL_PROC(_hw_snd, OID_AUTO, targetirqrate, CTLTYPE_INT | CTLFLAG_RW,
67 0, sizeof(int), sysctl_hw_snd_targetirqrate, "I", "");
68 static int report_soft_formats = 1;
69 SYSCTL_INT(_hw_snd, OID_AUTO, report_soft_formats, CTLFLAG_RW,
70 &report_soft_formats, 1, "report software-emulated formats");
72 static int chn_buildfeeder(struct pcm_channel *c);
75 chn_lockinit(struct pcm_channel *c, int dir)
79 c->lock = snd_mtxcreate(c->name, "pcm play channel");
82 c->lock = snd_mtxcreate(c->name, "pcm record channel");
85 c->lock = snd_mtxcreate(c->name, "pcm virtual play channel");
88 c->lock = snd_mtxcreate(c->name, "pcm fake channel");
94 chn_lockdestroy(struct pcm_channel *c)
100 chn_polltrigger(struct pcm_channel *c)
102 struct snd_dbuf *bs = c->bufsoft;
106 if (c->flags & CHN_F_MAPPED) {
107 if (sndbuf_getprevblocks(bs) == 0)
110 return (sndbuf_getblocks(bs) > sndbuf_getprevblocks(bs))? 1 : 0;
112 amt = (c->direction == PCMDIR_PLAY)? sndbuf_getfree(bs) : sndbuf_getready(bs);
114 lim = (c->flags & CHN_F_HAS_SIZE)? sndbuf_getblksz(bs) : 1;
117 return (amt >= lim)? 1 : 0;
123 chn_pollreset(struct pcm_channel *c)
125 struct snd_dbuf *bs = c->bufsoft;
128 sndbuf_updateprevtotal(bs);
133 chn_wakeup(struct pcm_channel *c)
135 struct snd_dbuf *bs = c->bufsoft;
136 struct pcmchan_children *pce;
139 if (SLIST_EMPTY(&c->children)) {
140 /*if (SEL_WAITING(sndbuf_getsel(bs)) && chn_polltrigger(c))*/
141 if (SLIST_FIRST(&sndbuf_getkq(bs)->ki_note) && chn_polltrigger(c)) {
145 * We would call KNOTE() here, but as we
146 * are in interrupt context, we'd have to
147 * acquire the MP lock before.
148 * Instead, we'll queue a task in a software
149 * interrupt, which will run with the MP lock
152 * buffer.c:sndbuf_kqtask will then call
153 * KNOTE() from safer context.
155 taskqueue_enqueue(taskqueue_swi, &bs->kqtask);
158 SLIST_FOREACH(pce, &c->children, link) {
159 CHN_LOCK(pce->channel);
160 chn_wakeup(pce->channel);
161 CHN_UNLOCK(pce->channel);
169 chn_sleep(struct pcm_channel *c, char *str, int timeout)
171 struct snd_dbuf *bs = c->bufsoft;
176 ret = snd_mtxsleep(bs, c->lock, PCATCH, str, timeout);
178 ret = tsleep(bs, PRIBIO | PCATCH, str, timeout);
185 * chn_dmaupdate() tracks the status of a dma transfer,
190 chn_dmaupdate(struct pcm_channel *c)
192 struct snd_dbuf *b = c->bufhard;
193 unsigned int delta, old, hwptr, amt;
195 KASSERT(sndbuf_getsize(b) > 0, ("bufsize == 0"));
198 old = sndbuf_gethwptr(b);
199 hwptr = chn_getptr(c);
200 delta = (sndbuf_getsize(b) + hwptr - old) % sndbuf_getsize(b);
201 sndbuf_sethwptr(b, hwptr);
204 if (delta >= ((sndbuf_getsize(b) * 15) / 16)) {
205 if (!(c->flags & (CHN_F_CLOSING | CHN_F_ABORTING)))
206 device_printf(c->dev, "hwptr went backwards %d -> %d\n", old, hwptr);
210 if (c->direction == PCMDIR_PLAY) {
211 amt = MIN(delta, sndbuf_getready(b));
213 sndbuf_dispose(b, NULL, amt);
215 amt = MIN(delta, sndbuf_getfree(b));
217 sndbuf_acquire(b, NULL, amt);
224 chn_wrupdate(struct pcm_channel *c)
229 KASSERT(c->direction == PCMDIR_PLAY, ("chn_wrupdate on bad channel"));
231 if ((c->flags & (CHN_F_MAPPED | CHN_F_VIRTUAL)) || !(c->flags & CHN_F_TRIGGERED))
235 /* tell the driver we've updated the primary buffer */
236 chn_trigger(c, PCMTRIG_EMLDMAWR);
238 kprintf("chn_wrupdate: chn_wrfeed returned %d\n", ret);)
243 chn_wrfeed(struct pcm_channel *c)
245 struct snd_dbuf *b = c->bufhard;
246 struct snd_dbuf *bs = c->bufsoft;
247 unsigned int ret, amt;
252 if (c->flags & CHN_F_CLOSING) {
253 sndbuf_dump(b, "b", 0x02);
254 sndbuf_dump(bs, "bs", 0x02);
258 if (c->flags & CHN_F_MAPPED)
259 sndbuf_acquire(bs, NULL, sndbuf_getfree(bs));
261 amt = sndbuf_getfree(b);
262 KASSERT(amt <= sndbuf_getsize(bs),
263 ("%s(%s): amt %d > source size %d, flags 0x%x", __func__, c->name,
264 amt, sndbuf_getsize(bs), c->flags));
266 ret = (amt > 0) ? sndbuf_feed(bs, b, c, c->feeder, amt) : ENOSPC;
268 * Possible xruns. There should be no empty space left in buffer.
270 if (sndbuf_getfree(b) > 0)
273 if (ret == 0 && sndbuf_getfree(b) < amt)
280 chn_wrintr(struct pcm_channel *c)
285 /* update pointers in primary buffer */
287 /* ...and feed from secondary to primary */
289 /* tell the driver we've updated the primary buffer */
290 chn_trigger(c, PCMTRIG_EMLDMAWR);
292 kprintf("chn_wrintr: chn_wrfeed returned %d\n", ret);)
296 * user write routine - uiomove data into secondary buffer, trigger if necessary
297 * if blocking, sleep, rinse and repeat.
299 * called externally, so must handle locking
303 chn_write(struct pcm_channel *c, struct uio *buf, int ioflags)
305 int ret, timeout, newsize, count, sz;
307 struct snd_dbuf *bs = c->bufsoft;
313 * XXX Certain applications attempt to write larger size
314 * of pcm data than c->blocksize2nd without blocking,
315 * resulting partial write. Expand the block size so that
316 * the write operation avoids blocking.
318 nbio = (c->flags & CHN_F_NBIO) || (ioflags & IO_NDELAY);
319 if (nbio && buf->uio_resid > (size_t)sndbuf_getblksz(bs)) {
320 DEB(device_printf(c->dev, "broken app, nbio and tried to write %ld bytes with fragsz %d\n",
321 buf->uio_resid, sndbuf_getblksz(bs)));
323 while (newsize < (int)szmin(buf->uio_resid, CHN_2NDBUFMAXSIZE / 2))
325 chn_setblocksize(c, sndbuf_getblkcnt(bs), newsize);
326 DEB(device_printf(c->dev, "frags reset to %d x %d\n", sndbuf_getblkcnt(bs), sndbuf_getblksz(bs)));
331 while (!ret && (buf->uio_resid > 0) && (count > 0)) {
332 sz = sndbuf_getfree(bs);
337 timeout = (hz * sndbuf_getblksz(bs)) / (sndbuf_getspd(bs) * sndbuf_getbps(bs));
341 ret = chn_sleep(c, "pcmwr", timeout);
342 if (ret == EWOULDBLOCK) {
349 sz = (int)szmin(sz, buf->uio_resid);
350 KASSERT(sz > 0, ("confusion in chn_write"));
351 /* kprintf("sz: %d\n", sz); */
354 * The following assumes that the free space in
355 * the buffer can never be less around the
356 * unlock-uiomove-lock sequence.
359 while (ret == 0 && togo> 0) {
360 p = sndbuf_getfreeptr(bs);
361 t = MIN(togo, sndbuf_getsize(bs) - p);
362 off = sndbuf_getbufofs(bs, p);
364 ret = uiomove(off, t, buf);
367 x = sndbuf_acquire(bs, NULL, t);
370 if (ret == 0 && !(c->flags & CHN_F_TRIGGERED))
374 /* kprintf("ret: %d left: %d\n", ret, buf->uio_resid); */
377 c->flags |= CHN_F_DEAD;
378 kprintf("%s: play interrupt timeout, channel dead\n", c->name);
386 chn_rddump(struct pcm_channel *c, unsigned int cnt)
388 struct snd_dbuf *b = c->bufhard;
392 static uint32_t kk = 0;
393 printf("%u: dumping %d bytes\n", ++kk, cnt);
396 sndbuf_setxrun(b, sndbuf_getxrun(b) + cnt);
397 return sndbuf_dispose(b, NULL, cnt);
402 * Feed new data from the read buffer. Can be called in the bottom half.
405 chn_rdfeed(struct pcm_channel *c)
407 struct snd_dbuf *b = c->bufhard;
408 struct snd_dbuf *bs = c->bufsoft;
409 unsigned int ret, amt;
413 if (c->flags & CHN_F_CLOSING) {
414 sndbuf_dump(b, "b", 0x02);
415 sndbuf_dump(bs, "bs", 0x02);
419 amt = sndbuf_getready(b);
420 if (sndbuf_getfree(bs) < amt) {
422 amt = sndbuf_getfree(bs);
425 amt = sndbuf_getfree(bs);
426 ret = (amt > 0)? sndbuf_feed(b, bs, c, c->feeder, amt) : 0;
428 amt = sndbuf_getready(b);
431 sndbuf_dispose(b, NULL, amt);
440 chn_rdupdate(struct pcm_channel *c)
445 KASSERT(c->direction == PCMDIR_REC, ("chn_rdupdate on bad channel"));
447 if ((c->flags & CHN_F_MAPPED) || !(c->flags & CHN_F_TRIGGERED))
449 chn_trigger(c, PCMTRIG_EMLDMARD);
453 kprintf("chn_rdfeed: %d\n", ret);)
456 /* read interrupt routine. Must be called with interrupts blocked. */
458 chn_rdintr(struct pcm_channel *c)
463 /* tell the driver to update the primary buffer if non-dma */
464 chn_trigger(c, PCMTRIG_EMLDMARD);
465 /* update pointers in primary buffer */
467 /* ...and feed from primary to secondary */
472 * user read routine - trigger if necessary, uiomove data from secondary buffer
473 * if blocking, sleep, rinse and repeat.
475 * called externally, so must handle locking
479 chn_read(struct pcm_channel *c, struct uio *buf, int ioflags)
481 int ret, timeout, sz, count;
483 struct snd_dbuf *bs = c->bufsoft;
488 nbio = (c->flags & CHN_F_NBIO) || (ioflags & IO_NDELAY);
489 if (!(c->flags & CHN_F_TRIGGERED))
494 while (!ret && (buf->uio_resid > 0) && (count > 0)) {
495 sz = (int)szmin(buf->uio_resid, sndbuf_getready(bs));
499 * The following assumes that the free space in
500 * the buffer can never be less around the
501 * unlock-uiomove-lock sequence.
504 while (ret == 0 && togo> 0) {
505 p = sndbuf_getreadyptr(bs);
506 t = MIN(togo, sndbuf_getsize(bs) - p);
507 off = sndbuf_getbufofs(bs, p);
509 ret = uiomove(off, t, buf);
512 x = sndbuf_dispose(bs, NULL, t);
519 timeout = (hz * sndbuf_getblksz(bs)) / (sndbuf_getspd(bs) * sndbuf_getbps(bs));
522 ret = chn_sleep(c, "pcmrd", timeout);
523 if (ret == EWOULDBLOCK) {
535 c->flags |= CHN_F_DEAD;
536 kprintf("%s: record interrupt timeout, channel dead\n", c->name);
543 chn_intr(struct pcm_channel *c)
547 if (c->direction == PCMDIR_PLAY)
555 chn_start(struct pcm_channel *c, int force)
558 struct snd_dbuf *b = c->bufhard;
559 struct snd_dbuf *bs = c->bufsoft;
562 /* if we're running, or if we're prevented from triggering, bail */
563 if ((c->flags & CHN_F_TRIGGERED) || ((c->flags & CHN_F_NOTRIGGER) && !force))
566 i = (c->direction == PCMDIR_PLAY)? sndbuf_getready(bs) : sndbuf_getfree(bs);
567 j = (c->direction == PCMDIR_PLAY)? sndbuf_getfree(b) : sndbuf_getready(b);
568 if (force || (i >= j)) {
569 c->flags |= CHN_F_TRIGGERED;
571 * if we're starting because a vchan started, don't feed any data
572 * or it becomes impossible to start vchans synchronised with the
573 * first one. the hardbuf should be empty so we top it up with
574 * silence to give it something to chew. the real data will be
575 * fed at the first irq.
577 if (c->direction == PCMDIR_PLAY) {
579 * Reduce pops during playback startup.
581 sndbuf_fillsilence(b);
582 if (SLIST_EMPTY(&c->children))
587 chn_trigger(c, PCMTRIG_START);
595 chn_resetbuf(struct pcm_channel *c)
597 struct snd_dbuf *b = c->bufhard;
598 struct snd_dbuf *bs = c->bufsoft;
606 * chn_sync waits until the space in the given channel goes above
607 * a threshold. The threshold is checked against fl or rl respectively.
608 * Assume that the condition can become true, do not check here...
611 chn_sync(struct pcm_channel *c, int threshold)
615 struct snd_dbuf *bs = c->bufsoft;
619 /* if we haven't yet started and nothing is buffered, else start*/
620 if (!(c->flags & CHN_F_TRIGGERED)) {
621 if (sndbuf_getready(bs) > 0) {
622 ret = chn_start(c, 1);
631 rdy = (c->direction == PCMDIR_PLAY)? sndbuf_getfree(bs) : sndbuf_getready(bs);
632 if (rdy <= threshold) {
633 ret = chn_sleep(c, "pcmsyn", 1);
634 if (ret == ERESTART || ret == EINTR) {
635 DEB(kprintf("chn_sync: tsleep returns %d\n", ret));
644 /* called externally, handle locking */
646 chn_poll(struct pcm_channel *c, int ev, struct thread *td)
651 if (!(c->flags & CHN_F_MAPPED) && !(c->flags & CHN_F_TRIGGERED))
654 if (chn_polltrigger(c) && chn_pollreset(c))
660 * chn_abort terminates a running dma transfer. it may sleep up to 200ms.
661 * it returns the number of bytes that have not been transferred.
663 * called from: dsp_close, dsp_ioctl, with channel locked
666 chn_abort(struct pcm_channel *c)
669 struct snd_dbuf *b = c->bufhard;
670 struct snd_dbuf *bs = c->bufsoft;
673 if (!(c->flags & CHN_F_TRIGGERED))
675 c->flags |= CHN_F_ABORTING;
677 c->flags &= ~CHN_F_TRIGGERED;
678 /* kill the channel */
679 chn_trigger(c, PCMTRIG_ABORT);
681 if (!(c->flags & CHN_F_VIRTUAL))
683 missing = sndbuf_getready(bs) + sndbuf_getready(b);
685 c->flags &= ~CHN_F_ABORTING;
690 * this routine tries to flush the dma transfer. It is called
691 * on a close of a playback channel.
692 * first, if there is data in the buffer, but the dma has not yet
693 * begun, we need to start it.
694 * next, we wait for the play buffer to drain
695 * finally, we stop the dma.
697 * called from: dsp_close, not valid for record channels.
701 chn_flush(struct pcm_channel *c)
703 int ret, count, resid, resid_p;
704 struct snd_dbuf *b = c->bufhard;
705 struct snd_dbuf *bs = c->bufsoft;
708 KASSERT(c->direction == PCMDIR_PLAY, ("chn_flush on bad channel"));
709 DEB(kprintf("chn_flush: c->flags 0x%08x\n", c->flags));
711 /* if we haven't yet started and nothing is buffered, else start*/
712 if (!(c->flags & CHN_F_TRIGGERED)) {
713 if (sndbuf_getready(bs) > 0) {
714 ret = chn_start(c, 1);
722 c->flags |= CHN_F_CLOSING;
723 resid = sndbuf_getready(bs) + sndbuf_getready(b);
727 while ((count > 0) && (resid > sndbuf_getsize(b)) && (ret == 0)) {
728 /* still pending output data. */
729 ret = chn_sleep(c, "pcmflu", hz / 10);
730 if (ret == EWOULDBLOCK)
733 resid = sndbuf_getready(bs) + sndbuf_getready(b);
734 if (resid == resid_p)
737 DEB(printf("chn_flush: buffer length increasind %d -> %d\n", resid_p, resid));
742 DEB(kprintf("chn_flush: timeout, hw %d, sw %d\n",
743 sndbuf_getready(b), sndbuf_getready(bs)));
745 c->flags &= ~CHN_F_TRIGGERED;
746 /* kill the channel */
747 chn_trigger(c, PCMTRIG_ABORT);
750 c->flags &= ~CHN_F_CLOSING;
755 fmtvalid(u_int32_t fmt, u_int32_t *fmtlist)
759 for (i = 0; fmtlist[i]; i++)
760 if (fmt == fmtlist[i])
766 chn_reset(struct pcm_channel *c, u_int32_t fmt)
771 c->flags &= CHN_F_RESET;
775 r = CHANNEL_RESET(c->methods, c->devinfo);
778 hwspd = DSP_DEFAULT_SPEED;
779 /* only do this on a record channel until feederbuilder works */
780 if (c->direction == PCMDIR_REC)
781 RANGE(hwspd, chn_getcaps(c)->minspeed, chn_getcaps(c)->maxspeed);
784 hwspd = chn_getcaps(c)->minspeed;
788 r = chn_setformat(c, fmt);
790 r = chn_setspeed(c, hwspd);
793 r = chn_setvolume(c, 100, 100);
797 r = chn_setblocksize(c, 0, 0);
800 r = CHANNEL_RESETDONE(c->methods, c->devinfo);
806 chn_init(struct pcm_channel *c, void *devinfo, int dir, int direction)
808 struct feeder_class *fc;
809 struct snd_dbuf *b, *bs;
812 chn_lockinit(c, dir);
820 b = sndbuf_create(c->dev, c->name, "primary", c);
823 bs = sndbuf_create(c->dev, c->name, "secondary", c);
830 fc = feeder_getclass(NULL);
833 if (chn_addfeeder(c, fc, NULL))
837 * XXX - sndbuf_setup() & sndbuf_resize() expect to be called
838 * with the channel unlocked because they are also called
839 * from driver methods that don't know about locking
842 sndbuf_setup(bs, NULL, 0);
850 CHN_UNLOCK(c); /* XXX - Unlock for CHANNEL_INIT() kmalloc() call */
851 c->devinfo = CHANNEL_INIT(c->methods, devinfo, b, c, direction);
853 if (c->devinfo == NULL)
857 if ((sndbuf_getsize(b) == 0) && ((c->flags & CHN_F_VIRTUAL) == 0))
860 ret = chn_setdir(c, direction);
864 ret = sndbuf_setfmt(b, AFMT_U8);
868 ret = sndbuf_setfmt(bs, AFMT_U8);
872 ret = chn_setvolume(c, 100, 100);
881 if (CHANNEL_FREE(c->methods, c->devinfo))
888 c->flags |= CHN_F_DEAD;
898 chn_kill(struct pcm_channel *c)
900 struct snd_dbuf *b = c->bufhard;
901 struct snd_dbuf *bs = c->bufsoft;
903 if (c->flags & CHN_F_TRIGGERED)
904 chn_trigger(c, PCMTRIG_ABORT);
905 while (chn_removefeeder(c) == 0);
906 if (CHANNEL_FREE(c->methods, c->devinfo))
908 c->flags |= CHN_F_DEAD;
916 chn_setdir(struct pcm_channel *c, int dir)
922 r = CHANNEL_SETDIR(c->methods, c->devinfo, c->direction);
927 chn_setvolume(struct pcm_channel *c, int left, int right)
930 /* should add a feeder for volume changing if channel returns -1 */
939 c->volume = left | (right << 8);
944 chn_tryspeed(struct pcm_channel *c, int speed)
946 struct pcm_feeder *f;
947 struct snd_dbuf *b = c->bufhard;
948 struct snd_dbuf *bs = c->bufsoft;
953 DEB(kprintf("setspeed, channel %s\n", c->name));
954 DEB(kprintf("want speed %d, ", speed));
960 sndbuf_setspd(bs, speed);
961 RANGE(speed, chn_getcaps(c)->minspeed, chn_getcaps(c)->maxspeed);
962 DEB(kprintf("try speed %d, ", speed));
963 sndbuf_setspd(b, CHANNEL_SETSPEED(c->methods, c->devinfo, speed));
964 DEB(kprintf("got speed %d\n", sndbuf_getspd(b)));
966 delta = sndbuf_getspd(b) - sndbuf_getspd(bs);
970 c->feederflags &= ~(1 << FEEDER_RATE);
972 * Used to be 500. It was too big!
975 c->feederflags |= 1 << FEEDER_RATE;
977 sndbuf_setspd(bs, sndbuf_getspd(b));
979 r = chn_buildfeeder(c);
980 DEB(kprintf("r = %d\n", r));
984 r = chn_setblocksize(c, 0, 0);
988 if (!(c->feederflags & (1 << FEEDER_RATE)))
992 f = chn_findfeeder(c, FEEDER_RATE);
993 DEB(kprintf("feedrate = %p\n", f));
997 x = (c->direction == PCMDIR_REC)? b : bs;
998 r = FEEDER_SET(f, FEEDRATE_SRC, sndbuf_getspd(x));
999 DEB(kprintf("feeder_set(FEEDRATE_SRC, %d) = %d\n", sndbuf_getspd(x), r));
1003 x = (c->direction == PCMDIR_REC)? bs : b;
1004 r = FEEDER_SET(f, FEEDRATE_DST, sndbuf_getspd(x));
1005 DEB(kprintf("feeder_set(FEEDRATE_DST, %d) = %d\n", sndbuf_getspd(x), r));
1008 r = CHANNEL_SETFORMAT(c->methods, c->devinfo,
1011 sndbuf_setfmt(bs, c->format);
1012 DEB(kprintf("setspeed done, r = %d\n", r));
1019 chn_setspeed(struct pcm_channel *c, int speed)
1021 int r, oldspeed = c->speed;
1023 r = chn_tryspeed(c, speed);
1025 DEB(kprintf("Failed to set speed %d falling back to %d\n", speed, oldspeed));
1026 r = chn_tryspeed(c, oldspeed);
1032 chn_tryformat(struct pcm_channel *c, u_int32_t fmt)
1034 struct snd_dbuf *b = c->bufhard;
1035 struct snd_dbuf *bs = c->bufsoft;
1040 DEB(kprintf("want format %d\n", fmt));
1042 r = chn_buildfeeder(c);
1044 sndbuf_setfmt(bs, c->format);
1046 r = CHANNEL_SETFORMAT(c->methods, c->devinfo, sndbuf_getfmt(b));
1048 r = chn_tryspeed(c, c->speed);
1056 chn_setformat(struct pcm_channel *c, u_int32_t fmt)
1058 u_int32_t oldfmt = c->format;
1061 r = chn_tryformat(c, fmt);
1063 DEB(kprintf("Format change %d failed, reverting to %d\n", fmt, oldfmt));
1064 chn_tryformat(c, oldfmt);
1070 * given a bufsz value, round it to a power of 2 in the min-max range
1071 * XXX only works if min and max are powers of 2
1074 round_bufsz(int bufsz, int min, int max)
1078 KASSERT((min & (min-1)) == 0, ("min %d must be power of 2", min));
1079 KASSERT((max & (max-1)) == 0, ("max %d must be power of 2", max));
1080 while (tmp <= bufsz)
1089 * set the channel's blocksize both for soft and hard buffers.
1091 * blksz should be a power of 2 between 2**4 and 2**16 -- it is useful
1092 * that it has the same value for both bufsoft and bufhard.
1093 * blksz == -1 computes values according to a target irq rate.
1094 * blksz == 0 reuses previous values if available, otherwise
1097 * blkcnt is set by the user, between 2 and (2**17)/blksz for bufsoft,
1098 * but should be a power of 2 for bufhard to simplify life to low
1100 * Note, for the rec channel a large blkcnt is ok,
1101 * but for the play channel we want blksz as small as possible to keep
1102 * the delay small, because routines in the write path always try to
1103 * keep bufhard full.
1105 * Unless we have good reason to, use the values suggested by the caller.
1108 chn_setblocksize(struct pcm_channel *c, int blkcnt, int blksz)
1110 struct snd_dbuf *b = c->bufhard;
1111 struct snd_dbuf *bs = c->bufsoft;
1112 int irqhz, ret, maxsz, maxsize, reqblksz;
1115 if (!CANCHANGE(c) || (c->flags & CHN_F_MAPPED)) {
1116 KASSERT(sndbuf_getsize(bs) == 0 ||
1117 sndbuf_getsize(bs) >= sndbuf_getsize(b),
1118 ("%s(%s): bufsoft size %d < bufhard size %d", __func__,
1119 c->name, sndbuf_getsize(bs), sndbuf_getsize(b)));
1122 c->flags |= CHN_F_SETBLOCKSIZE;
1125 DEB(kprintf("%s(%d, %d)\n", __func__, blkcnt, blksz));
1126 if (blksz == 0 || blksz == -1) { /* let the driver choose values */
1127 if (blksz == -1) /* delete previous values */
1128 c->flags &= ~CHN_F_HAS_SIZE;
1129 if (!(c->flags & CHN_F_HAS_SIZE)) { /* no previous value */
1131 * compute a base blksz according to the target irq
1132 * rate, then round to a suitable power of 2
1133 * in the range 16.. 2^17/2.
1134 * Finally compute a suitable blkcnt.
1136 blksz = round_bufsz( (sndbuf_getbps(bs) *
1137 sndbuf_getspd(bs)) / chn_targetirqrate,
1138 16, CHN_2NDBUFMAXSIZE / 2);
1139 blkcnt = CHN_2NDBUFMAXSIZE / blksz;
1140 } else { /* use previously defined value */
1141 blkcnt = sndbuf_getblkcnt(bs);
1142 blksz = sndbuf_getblksz(bs);
1146 * use supplied values if reasonable. Note that here we
1147 * might have blksz which is not a power of 2 if the
1148 * ioctl() to compute it allows such values.
1151 if ((blksz < 16) || (blkcnt < 2) || (blkcnt * blksz > CHN_2NDBUFMAXSIZE))
1154 c->flags |= CHN_F_HAS_SIZE;
1158 if (reqblksz < sndbuf_getbps(bs))
1159 reqblksz = sndbuf_getbps(bs);
1160 if (reqblksz % sndbuf_getbps(bs))
1161 reqblksz -= reqblksz % sndbuf_getbps(bs);
1163 /* adjust for different hw format/speed */
1165 * Now compute the approx irq rate for the given (soft) blksz,
1166 * reduce to the acceptable range and compute a corresponding blksz
1167 * for the hard buffer. Then set the channel's blocksize and
1168 * corresponding hardbuf value. The number of blocks used should
1169 * be set by the device-specific routine. In fact, even the
1170 * call to sndbuf_setblksz() should not be here! XXX
1173 irqhz = (sndbuf_getbps(bs) * sndbuf_getspd(bs)) / blksz;
1174 RANGE(irqhz, 16, 512);
1176 maxsz = sndbuf_getmaxsize(b);
1177 if (maxsz == 0) /* virtual channels don't appear to allocate bufhard */
1178 maxsz = CHN_2NDBUFMAXSIZE;
1179 blksz = round_bufsz( (sndbuf_getbps(b) * sndbuf_getspd(b)) / irqhz,
1182 /* Increase the size of bufsoft if before increasing bufhard. */
1183 maxsize = sndbuf_getsize(b);
1184 if (sndbuf_getsize(bs) > maxsize)
1185 maxsize = sndbuf_getsize(bs);
1186 if (reqblksz * blkcnt > maxsize)
1187 maxsize = reqblksz * blkcnt;
1188 if (sndbuf_getsize(bs) != maxsize || sndbuf_getblksz(bs) != reqblksz) {
1189 ret = sndbuf_remalloc(bs, maxsize/reqblksz, reqblksz);
1195 sndbuf_setblksz(b, CHANNEL_SETBLOCKSIZE(c->methods, c->devinfo, blksz));
1198 /* Decrease the size of bufsoft after decreasing bufhard. */
1199 maxsize = sndbuf_getsize(b);
1200 if (reqblksz * blkcnt > maxsize)
1201 maxsize = reqblksz * blkcnt;
1202 if (maxsize > sndbuf_getsize(bs))
1203 kprintf("Danger! %s bufsoft size increasing from %d to %d after CHANNEL_SETBLOCKSIZE()\n",
1204 c->name, sndbuf_getsize(bs), maxsize);
1205 if (sndbuf_getsize(bs) != maxsize || sndbuf_getblksz(bs) != reqblksz) {
1206 ret = sndbuf_remalloc(bs, maxsize/reqblksz, reqblksz);
1213 KASSERT(sndbuf_getsize(bs) == 0 ||
1214 sndbuf_getsize(bs) >= sndbuf_getsize(b),
1215 ("%s(%s): bufsoft size %d < bufhard size %d, reqblksz=%d blksz=%d maxsize=%d blkcnt=%d",
1216 __func__, c->name, sndbuf_getsize(bs), sndbuf_getsize(b), reqblksz,
1217 blksz, maxsize, blkcnt));
1219 c->flags &= ~CHN_F_SETBLOCKSIZE;
1222 static uint32_t kk = 0;
1223 printf("%u: b %d/%d/%d : (%d)%d/0x%0x | bs %d/%d/%d : (%d)%d/0x%0x\n", ++kk,
1224 sndbuf_getsize(b), sndbuf_getblksz(b), sndbuf_getblkcnt(b),
1226 sndbuf_getspd(b), sndbuf_getfmt(b),
1227 sndbuf_getsize(bs), sndbuf_getblksz(bs), sndbuf_getblkcnt(bs),
1229 sndbuf_getspd(bs), sndbuf_getfmt(bs));
1230 if (sndbuf_getsize(b) % sndbuf_getbps(b) ||
1231 sndbuf_getblksz(b) % sndbuf_getbps(b) ||
1232 sndbuf_getsize(bs) % sndbuf_getbps(bs) ||
1233 sndbuf_getblksz(b) % sndbuf_getbps(b)) {
1234 printf("%u: bps/blksz alignment screwed!\n", kk);
1242 chn_trigger(struct pcm_channel *c, int go)
1247 ret = CHANNEL_TRIGGER(c->methods, c->devinfo, go);
1253 chn_getptr(struct pcm_channel *c)
1257 int a = (1 << c->align) - 1;
1260 hwptr = (c->flags & CHN_F_TRIGGERED)? CHANNEL_GETPTR(c->methods, c->devinfo) : 0;
1261 /* don't allow unaligned values in the hwa ptr */
1263 hwptr &= ~a ; /* Apply channel align mask */
1265 hwptr &= DMA_ALIGN_MASK; /* Apply DMA align mask */
1271 hwptr = (c->flags & CHN_F_TRIGGERED)? CHANNEL_GETPTR(c->methods, c->devinfo) : 0;
1272 return (hwptr - (hwptr % sndbuf_getbps(c->bufhard)));
1275 struct pcmchan_caps *
1276 chn_getcaps(struct pcm_channel *c)
1279 return CHANNEL_GETCAPS(c->methods, c->devinfo);
1283 chn_getformats(struct pcm_channel *c)
1285 u_int32_t *fmtlist, fmts;
1288 fmtlist = chn_getcaps(c)->fmtlist;
1290 for (i = 0; fmtlist[i]; i++)
1293 /* report software-supported formats */
1294 if (report_soft_formats)
1295 fmts |= AFMT_MU_LAW|AFMT_A_LAW|AFMT_U32_LE|AFMT_U32_BE|
1296 AFMT_S32_LE|AFMT_S32_BE|AFMT_U24_LE|AFMT_U24_BE|
1297 AFMT_S24_LE|AFMT_S24_BE|AFMT_U16_LE|AFMT_U16_BE|
1298 AFMT_S16_LE|AFMT_S16_BE|AFMT_U8|AFMT_S8;
1304 chn_buildfeeder(struct pcm_channel *c)
1306 struct feeder_class *fc;
1307 struct pcm_feederdesc desc;
1308 u_int32_t tmp[2], type, flags, hwfmt, *fmtlist;
1312 while (chn_removefeeder(c) == 0);
1313 KASSERT((c->feeder == NULL), ("feeder chain not empty"));
1315 c->align = sndbuf_getalign(c->bufsoft);
1317 if (SLIST_EMPTY(&c->children)) {
1318 fc = feeder_getclass(NULL);
1319 KASSERT(fc != NULL, ("can't find root feeder"));
1321 err = chn_addfeeder(c, fc, NULL);
1323 DEB(kprintf("can't add root feeder, err %d\n", err));
1327 c->feeder->desc->out = c->format;
1329 if (c->flags & CHN_F_HAS_VCHAN) {
1330 desc.type = FEEDER_MIXER;
1333 DEB(printf("can't decide which feeder type to use!\n"));
1336 desc.out = c->format;
1338 fc = feeder_getclass(&desc);
1340 DEB(kprintf("can't find vchan feeder\n"));
1345 err = chn_addfeeder(c, fc, &desc);
1347 DEB(kprintf("can't add vchan feeder, err %d\n", err));
1352 c->feederflags &= ~(1 << FEEDER_VOLUME);
1353 if (c->direction == PCMDIR_PLAY &&
1354 !(c->flags & CHN_F_VIRTUAL) &&
1355 c->parentsnddev && (c->parentsnddev->flags & SD_F_SOFTPCMVOL) &&
1356 c->parentsnddev->mixer_dev)
1357 c->feederflags |= 1 << FEEDER_VOLUME;
1358 flags = c->feederflags;
1359 fmtlist = chn_getcaps(c)->fmtlist;
1361 DEB(kprintf("feederflags %x\n", flags));
1363 for (type = FEEDER_RATE; type <= FEEDER_LAST; type++) {
1364 if (flags & (1 << type)) {
1369 DEB(kprintf("find feeder type %d, ", type));
1370 fc = feeder_getclass(&desc);
1371 DEB(kprintf("got %p\n", fc));
1373 DEB(kprintf("can't find required feeder type %d\n", type));
1378 DEB(kprintf("build fmtchain from 0x%08x to 0x%08x: ", c->feeder->desc->out, fc->desc->in));
1379 tmp[0] = fc->desc->in;
1381 if (chn_fmtchain(c, tmp) == 0) {
1382 DEB(printf("failed\n"));
1386 DEB(printf("ok\n"));
1388 err = chn_addfeeder(c, fc, fc->desc);
1390 DEB(kprintf("can't add feeder %p, output 0x%x, err %d\n", fc, fc->desc->out, err));
1394 DEB(kprintf("added feeder %p, output 0x%x\n", fc, c->feeder->desc->out));
1398 if (c->direction == PCMDIR_REC) {
1401 hwfmt = chn_fmtchain(c, tmp);
1403 hwfmt = chn_fmtchain(c, fmtlist);
1405 if (hwfmt == 0 || !fmtvalid(hwfmt, fmtlist)) {
1406 DEB(printf("Invalid hardware format: 0x%08x\n", hwfmt));
1410 sndbuf_setfmt(c->bufhard, hwfmt);
1412 if ((flags & (1 << FEEDER_VOLUME))) {
1413 struct dev_ioctl_args map;
1414 u_int32_t parent = SOUND_MIXER_NONE;
1415 int vol, left, right;
1417 vol = 100 | (100 << 8);
1421 * XXX This is ugly! The way mixer subs being so secretive
1422 * about its own internals force us to use this silly
1425 map.a_head.a_dev = c->parentsnddev->mixer_dev;
1426 map.a_cmd = MIXER_READ(SOUND_MIXER_PCM);
1427 map.a_data = (caddr_t)&vol;
1430 map.a_sysmsg = NULL;
1431 if (mixer_ioctl(&map) != 0)
1432 device_printf(c->dev, "Soft PCM Volume: Failed to read default value\n");
1434 right = (vol >> 8) & 0x7f;
1435 if (c->parentsnddev != NULL &&
1436 c->parentsnddev->mixer_dev != NULL &&
1437 c->parentsnddev->mixer_dev->si_drv1 != NULL)
1438 parent = mix_getparent(
1439 c->parentsnddev->mixer_dev->si_drv1,
1441 if (parent != SOUND_MIXER_NONE) {
1442 vol = 100 | (100 << 8);
1443 map.a_head.a_dev = c->parentsnddev->mixer_dev;
1444 map.a_cmd = MIXER_READ(parent);
1445 map.a_data = (caddr_t)&vol;
1448 if (mixer_ioctl(&map) != 0)
1449 device_printf(c->dev, "Soft Volume: Failed to read parent default value\n");
1450 left = (left * (vol & 0x7f)) / 100;
1451 right = (right * ((vol >> 8) & 0x7f)) / 100;
1455 chn_setvolume(c, left, right);
1462 chn_notify(struct pcm_channel *c, u_int32_t flags)
1464 struct pcmchan_children *pce;
1465 struct pcm_channel *child;
1470 if (SLIST_EMPTY(&c->children)) {
1475 run = (c->flags & CHN_F_TRIGGERED)? 1 : 0;
1477 * if the hwchan is running, we can't change its rate, format or
1481 flags &= CHN_N_VOLUME | CHN_N_TRIGGER;
1483 if (flags & CHN_N_RATE) {
1485 * we could do something here, like scan children and decide on
1486 * the most appropriate rate to mix at, but we don't for now
1489 if (flags & CHN_N_FORMAT) {
1491 * we could do something here, like scan children and decide on
1492 * the most appropriate mixer feeder to use, but we don't for now
1495 if (flags & CHN_N_VOLUME) {
1497 * we could do something here but we don't for now
1500 if (flags & CHN_N_BLOCKSIZE) {
1503 * scan the children, find the lowest blocksize and use that
1504 * for the hard blocksize
1506 blksz = sndbuf_getmaxsize(c->bufhard) / 2;
1507 SLIST_FOREACH(pce, &c->children, link) {
1508 child = pce->channel;
1510 if (sndbuf_getblksz(child->bufhard) < blksz)
1511 blksz = sndbuf_getblksz(child->bufhard);
1514 chn_setblocksize(c, 2, blksz);
1516 if (flags & CHN_N_TRIGGER) {
1519 * scan the children, and figure out if any are running
1520 * if so, we need to be running, otherwise we need to be stopped
1521 * if we aren't in our target sstate, move to it
1524 SLIST_FOREACH(pce, &c->children, link) {
1525 child = pce->channel;
1527 if (child->flags & CHN_F_TRIGGERED)
1541 chn_lock(struct pcm_channel *c)
1547 chn_unlock(struct pcm_channel *c)