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, 0, 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))
234 if (sndbuf_getsize(c->bufsoft) == 0) {
235 DEB(kprintf("chn_wrupdate: avoid calling chn_wrfeed without any data in soft buffer");)
239 /* tell the driver we've updated the primary buffer */
240 chn_trigger(c, PCMTRIG_EMLDMAWR);
242 kprintf("chn_wrupdate: chn_wrfeed returned %d\n", ret);)
247 chn_wrfeed(struct pcm_channel *c)
249 struct snd_dbuf *b = c->bufhard;
250 struct snd_dbuf *bs = c->bufsoft;
251 unsigned int ret, amt;
256 if (c->flags & CHN_F_CLOSING) {
257 sndbuf_dump(b, "b", 0x02);
258 sndbuf_dump(bs, "bs", 0x02);
262 if (c->flags & CHN_F_MAPPED)
263 sndbuf_acquire(bs, NULL, sndbuf_getfree(bs));
265 amt = sndbuf_getfree(b);
266 KASSERT(amt <= sndbuf_getsize(bs),
267 ("%s(%s): amt %d > source size %d, flags 0x%x", __func__, c->name,
268 amt, sndbuf_getsize(bs), c->flags));
270 ret = (amt > 0) ? sndbuf_feed(bs, b, c, c->feeder, amt) : ENOSPC;
272 * Possible xruns. There should be no empty space left in buffer.
274 if (sndbuf_getfree(b) > 0)
277 if (ret == 0 && sndbuf_getfree(b) < amt)
284 chn_wrintr(struct pcm_channel *c)
289 /* update pointers in primary buffer */
291 /* ...and feed from secondary to primary */
292 if (sndbuf_getsize(c->bufsoft) == 0) {
293 DEB(kprintf("chn_wrintr: avoid calling chn_wrfeed without any data in soft buffer");)
297 /* tell the driver we've updated the primary buffer */
298 chn_trigger(c, PCMTRIG_EMLDMAWR);
300 kprintf("chn_wrintr: chn_wrfeed returned %d\n", ret);)
304 * user write routine - uiomove data into secondary buffer, trigger if necessary
305 * if blocking, sleep, rinse and repeat.
307 * called externally, so must handle locking
311 chn_write(struct pcm_channel *c, struct uio *buf, int ioflags)
313 int ret, timeout, newsize, count, sz;
315 struct snd_dbuf *bs = c->bufsoft;
321 * XXX Certain applications attempt to write larger size
322 * of pcm data than c->blocksize2nd without blocking,
323 * resulting partial write. Expand the block size so that
324 * the write operation avoids blocking.
326 nbio = (c->flags & CHN_F_NBIO) || (ioflags & IO_NDELAY);
327 if (nbio && buf->uio_resid > (size_t)sndbuf_getblksz(bs)) {
328 DEB(device_printf(c->dev, "broken app, nbio and tried to write %ld bytes with fragsz %d\n",
329 buf->uio_resid, sndbuf_getblksz(bs)));
331 while (newsize < (int)szmin(buf->uio_resid, CHN_2NDBUFMAXSIZE / 2))
333 chn_setblocksize(c, sndbuf_getblkcnt(bs), newsize);
334 DEB(device_printf(c->dev, "frags reset to %d x %d\n", sndbuf_getblkcnt(bs), sndbuf_getblksz(bs)));
339 while (!ret && (buf->uio_resid > 0) && (count > 0)) {
340 sz = sndbuf_getfree(bs);
345 timeout = (hz * sndbuf_getblksz(bs)) / (sndbuf_getspd(bs) * sndbuf_getbps(bs));
349 ret = chn_sleep(c, "pcmwr", timeout);
350 if (ret == EWOULDBLOCK) {
357 sz = (int)szmin(sz, buf->uio_resid);
358 KASSERT(sz > 0, ("confusion in chn_write"));
359 /* kprintf("sz: %d\n", sz); */
362 * The following assumes that the free space in
363 * the buffer can never be less around the
364 * unlock-uiomove-lock sequence.
367 while (ret == 0 && togo> 0) {
368 p = sndbuf_getfreeptr(bs);
369 t = MIN(togo, sndbuf_getsize(bs) - p);
370 off = sndbuf_getbufofs(bs, p);
372 ret = uiomove(off, t, buf);
375 x = sndbuf_acquire(bs, NULL, t);
378 if (ret == 0 && !(c->flags & CHN_F_TRIGGERED))
382 /* kprintf("ret: %d left: %d\n", ret, buf->uio_resid); */
385 c->flags |= CHN_F_DEAD;
386 kprintf("%s: play interrupt timeout, channel dead\n", c->name);
394 chn_rddump(struct pcm_channel *c, unsigned int cnt)
396 struct snd_dbuf *b = c->bufhard;
400 static uint32_t kk = 0;
401 printf("%u: dumping %d bytes\n", ++kk, cnt);
404 sndbuf_setxrun(b, sndbuf_getxrun(b) + cnt);
405 return sndbuf_dispose(b, NULL, cnt);
410 * Feed new data from the read buffer. Can be called in the bottom half.
413 chn_rdfeed(struct pcm_channel *c)
415 struct snd_dbuf *b = c->bufhard;
416 struct snd_dbuf *bs = c->bufsoft;
417 unsigned int ret, amt;
421 if (c->flags & CHN_F_CLOSING) {
422 sndbuf_dump(b, "b", 0x02);
423 sndbuf_dump(bs, "bs", 0x02);
427 amt = sndbuf_getready(b);
428 if (sndbuf_getfree(bs) < amt) {
430 amt = sndbuf_getfree(bs);
433 amt = sndbuf_getfree(bs);
434 ret = (amt > 0)? sndbuf_feed(b, bs, c, c->feeder, amt) : 0;
436 amt = sndbuf_getready(b);
439 sndbuf_dispose(b, NULL, amt);
448 chn_rdupdate(struct pcm_channel *c)
453 KASSERT(c->direction == PCMDIR_REC, ("chn_rdupdate on bad channel"));
455 if ((c->flags & CHN_F_MAPPED) || !(c->flags & CHN_F_TRIGGERED))
457 chn_trigger(c, PCMTRIG_EMLDMARD);
461 kprintf("chn_rdfeed: %d\n", ret);)
464 /* read interrupt routine. Must be called with interrupts blocked. */
466 chn_rdintr(struct pcm_channel *c)
471 /* tell the driver to update the primary buffer if non-dma */
472 chn_trigger(c, PCMTRIG_EMLDMARD);
473 /* update pointers in primary buffer */
475 /* ...and feed from primary to secondary */
480 * user read routine - trigger if necessary, uiomove data from secondary buffer
481 * if blocking, sleep, rinse and repeat.
483 * called externally, so must handle locking
487 chn_read(struct pcm_channel *c, struct uio *buf, int ioflags)
489 int ret, timeout, sz, count;
491 struct snd_dbuf *bs = c->bufsoft;
496 nbio = (c->flags & CHN_F_NBIO) || (ioflags & IO_NDELAY);
497 if (!(c->flags & CHN_F_TRIGGERED))
502 while (!ret && (buf->uio_resid > 0) && (count > 0)) {
503 sz = (int)szmin(buf->uio_resid, sndbuf_getready(bs));
507 * The following assumes that the free space in
508 * the buffer can never be less around the
509 * unlock-uiomove-lock sequence.
512 while (ret == 0 && togo> 0) {
513 p = sndbuf_getreadyptr(bs);
514 t = MIN(togo, sndbuf_getsize(bs) - p);
515 off = sndbuf_getbufofs(bs, p);
517 ret = uiomove(off, t, buf);
520 x = sndbuf_dispose(bs, NULL, t);
527 timeout = (hz * sndbuf_getblksz(bs)) / (sndbuf_getspd(bs) * sndbuf_getbps(bs));
530 ret = chn_sleep(c, "pcmrd", timeout);
531 if (ret == EWOULDBLOCK) {
543 c->flags |= CHN_F_DEAD;
544 kprintf("%s: record interrupt timeout, channel dead\n", c->name);
551 chn_intr(struct pcm_channel *c)
555 if (c->direction == PCMDIR_PLAY)
563 chn_start(struct pcm_channel *c, int force)
566 struct snd_dbuf *b = c->bufhard;
567 struct snd_dbuf *bs = c->bufsoft;
570 /* if we're running, or if we're prevented from triggering, bail */
571 if ((c->flags & CHN_F_TRIGGERED) || ((c->flags & CHN_F_NOTRIGGER) && !force))
574 i = (c->direction == PCMDIR_PLAY)? sndbuf_getready(bs) : sndbuf_getfree(bs);
575 j = (c->direction == PCMDIR_PLAY)? sndbuf_getfree(b) : sndbuf_getready(b);
576 if (force || (i >= j)) {
577 c->flags |= CHN_F_TRIGGERED;
579 * if we're starting because a vchan started, don't feed any data
580 * or it becomes impossible to start vchans synchronised with the
581 * first one. the hardbuf should be empty so we top it up with
582 * silence to give it something to chew. the real data will be
583 * fed at the first irq.
585 if (c->direction == PCMDIR_PLAY) {
587 * Reduce pops during playback startup.
589 sndbuf_fillsilence(b);
590 if (SLIST_EMPTY(&c->children))
595 chn_trigger(c, PCMTRIG_START);
603 chn_resetbuf(struct pcm_channel *c)
605 struct snd_dbuf *b = c->bufhard;
606 struct snd_dbuf *bs = c->bufsoft;
614 * chn_sync waits until the space in the given channel goes above
615 * a threshold. The threshold is checked against fl or rl respectively.
616 * Assume that the condition can become true, do not check here...
619 chn_sync(struct pcm_channel *c, int threshold)
623 struct snd_dbuf *bs = c->bufsoft;
627 /* if we haven't yet started and nothing is buffered, else start*/
628 if (!(c->flags & CHN_F_TRIGGERED)) {
629 if (sndbuf_getready(bs) > 0) {
630 ret = chn_start(c, 1);
639 rdy = (c->direction == PCMDIR_PLAY)? sndbuf_getfree(bs) : sndbuf_getready(bs);
640 if (rdy <= threshold) {
641 ret = chn_sleep(c, "pcmsyn", 1);
642 if (ret == ERESTART || ret == EINTR) {
643 DEB(kprintf("chn_sync: tsleep returns %d\n", ret));
652 /* called externally, handle locking */
654 chn_poll(struct pcm_channel *c, int ev, struct thread *td)
659 if (!(c->flags & CHN_F_MAPPED) && !(c->flags & CHN_F_TRIGGERED))
662 if (chn_polltrigger(c) && chn_pollreset(c))
668 * chn_abort terminates a running dma transfer. it may sleep up to 200ms.
669 * it returns the number of bytes that have not been transferred.
671 * called from: dsp_close, dsp_ioctl, with channel locked
674 chn_abort(struct pcm_channel *c)
677 struct snd_dbuf *b = c->bufhard;
678 struct snd_dbuf *bs = c->bufsoft;
681 if (!(c->flags & CHN_F_TRIGGERED))
683 c->flags |= CHN_F_ABORTING;
685 c->flags &= ~CHN_F_TRIGGERED;
686 /* kill the channel */
687 chn_trigger(c, PCMTRIG_ABORT);
689 if (!(c->flags & CHN_F_VIRTUAL))
691 missing = sndbuf_getready(bs) + sndbuf_getready(b);
693 c->flags &= ~CHN_F_ABORTING;
698 * this routine tries to flush the dma transfer. It is called
699 * on a close of a playback channel.
700 * first, if there is data in the buffer, but the dma has not yet
701 * begun, we need to start it.
702 * next, we wait for the play buffer to drain
703 * finally, we stop the dma.
705 * called from: dsp_close, not valid for record channels.
709 chn_flush(struct pcm_channel *c)
711 int ret, count, resid, resid_p;
712 struct snd_dbuf *b = c->bufhard;
713 struct snd_dbuf *bs = c->bufsoft;
716 KASSERT(c->direction == PCMDIR_PLAY, ("chn_flush on bad channel"));
717 DEB(kprintf("chn_flush: c->flags 0x%08x\n", c->flags));
719 /* if we haven't yet started and nothing is buffered, else start*/
720 if (!(c->flags & CHN_F_TRIGGERED)) {
721 if (sndbuf_getready(bs) > 0) {
722 ret = chn_start(c, 1);
730 c->flags |= CHN_F_CLOSING;
731 resid = sndbuf_getready(bs) + sndbuf_getready(b);
735 while ((count > 0) && (resid > sndbuf_getsize(b)) && (ret == 0)) {
736 /* still pending output data. */
737 ret = chn_sleep(c, "pcmflu", hz / 10);
738 if (ret == EWOULDBLOCK)
741 resid = sndbuf_getready(bs) + sndbuf_getready(b);
742 if (resid == resid_p)
745 DEB(kprintf("chn_flush: buffer length increasind %d -> %d\n", resid_p, resid));
750 DEB(kprintf("chn_flush: timeout, hw %d, sw %d\n",
751 sndbuf_getready(b), sndbuf_getready(bs)));
753 c->flags &= ~CHN_F_TRIGGERED;
754 /* kill the channel */
755 chn_trigger(c, PCMTRIG_ABORT);
758 c->flags &= ~CHN_F_CLOSING;
763 fmtvalid(u_int32_t fmt, u_int32_t *fmtlist)
767 for (i = 0; fmtlist[i]; i++)
768 if (fmt == fmtlist[i])
774 chn_reset(struct pcm_channel *c, u_int32_t fmt)
779 c->flags &= CHN_F_RESET;
783 r = CHANNEL_RESET(c->methods, c->devinfo);
786 hwspd = DSP_DEFAULT_SPEED;
787 /* only do this on a record channel until feederbuilder works */
788 if (c->direction == PCMDIR_REC)
789 RANGE(hwspd, chn_getcaps(c)->minspeed, chn_getcaps(c)->maxspeed);
792 hwspd = chn_getcaps(c)->minspeed;
796 r = chn_setformat(c, fmt);
798 r = chn_setspeed(c, hwspd);
801 r = chn_setvolume(c, 100, 100);
805 r = chn_setblocksize(c, 0, 0);
808 r = CHANNEL_RESETDONE(c->methods, c->devinfo);
814 chn_init(struct pcm_channel *c, void *devinfo, int dir, int direction)
816 struct feeder_class *fc;
817 struct snd_dbuf *b, *bs;
820 chn_lockinit(c, dir);
828 b = sndbuf_create(c->dev, c->name, "primary", c);
831 bs = sndbuf_create(c->dev, c->name, "secondary", c);
838 fc = feeder_getclass(NULL);
841 if (chn_addfeeder(c, fc, NULL))
845 * XXX - sndbuf_setup() & sndbuf_resize() expect to be called
846 * with the channel unlocked because they are also called
847 * from driver methods that don't know about locking
850 sndbuf_setup(bs, NULL, 0);
858 CHN_UNLOCK(c); /* XXX - Unlock for CHANNEL_INIT() kmalloc() call */
859 c->devinfo = CHANNEL_INIT(c->methods, devinfo, b, c, direction);
861 if (c->devinfo == NULL)
865 if ((sndbuf_getsize(b) == 0) && ((c->flags & CHN_F_VIRTUAL) == 0))
868 ret = chn_setdir(c, direction);
872 ret = sndbuf_setfmt(b, AFMT_U8);
876 ret = sndbuf_setfmt(bs, AFMT_U8);
880 ret = chn_setvolume(c, 100, 100);
889 if (CHANNEL_FREE(c->methods, c->devinfo))
896 c->flags |= CHN_F_DEAD;
906 chn_kill(struct pcm_channel *c)
908 struct snd_dbuf *b = c->bufhard;
909 struct snd_dbuf *bs = c->bufsoft;
911 if (c->flags & CHN_F_TRIGGERED)
912 chn_trigger(c, PCMTRIG_ABORT);
913 while (chn_removefeeder(c) == 0);
914 if (CHANNEL_FREE(c->methods, c->devinfo))
916 c->flags |= CHN_F_DEAD;
924 chn_setdir(struct pcm_channel *c, int dir)
930 r = CHANNEL_SETDIR(c->methods, c->devinfo, c->direction);
935 chn_setvolume(struct pcm_channel *c, int left, int right)
938 /* should add a feeder for volume changing if channel returns -1 */
947 c->volume = left | (right << 8);
952 chn_tryspeed(struct pcm_channel *c, int speed)
954 struct pcm_feeder *f;
955 struct snd_dbuf *b = c->bufhard;
956 struct snd_dbuf *bs = c->bufsoft;
961 DEB(kprintf("setspeed, channel %s\n", c->name));
962 DEB(kprintf("want speed %d, ", speed));
968 sndbuf_setspd(bs, speed);
969 RANGE(speed, chn_getcaps(c)->minspeed, chn_getcaps(c)->maxspeed);
970 DEB(kprintf("try speed %d, ", speed));
971 sndbuf_setspd(b, CHANNEL_SETSPEED(c->methods, c->devinfo, speed));
972 DEB(kprintf("got speed %d\n", sndbuf_getspd(b)));
974 delta = sndbuf_getspd(b) - sndbuf_getspd(bs);
978 c->feederflags &= ~(1 << FEEDER_RATE);
980 * Used to be 500. It was too big!
983 c->feederflags |= 1 << FEEDER_RATE;
985 sndbuf_setspd(bs, sndbuf_getspd(b));
987 r = chn_buildfeeder(c);
988 DEB(kprintf("r = %d\n", r));
992 r = chn_setblocksize(c, 0, 0);
996 if (!(c->feederflags & (1 << FEEDER_RATE)))
1000 f = chn_findfeeder(c, FEEDER_RATE);
1001 DEB(kprintf("feedrate = %p\n", f));
1005 x = (c->direction == PCMDIR_REC)? b : bs;
1006 r = FEEDER_SET(f, FEEDRATE_SRC, sndbuf_getspd(x));
1007 DEB(kprintf("feeder_set(FEEDRATE_SRC, %d) = %d\n", sndbuf_getspd(x), r));
1011 x = (c->direction == PCMDIR_REC)? bs : b;
1012 r = FEEDER_SET(f, FEEDRATE_DST, sndbuf_getspd(x));
1013 DEB(kprintf("feeder_set(FEEDRATE_DST, %d) = %d\n", sndbuf_getspd(x), r));
1016 r = CHANNEL_SETFORMAT(c->methods, c->devinfo,
1019 sndbuf_setfmt(bs, c->format);
1020 DEB(kprintf("setspeed done, r = %d\n", r));
1027 chn_setspeed(struct pcm_channel *c, int speed)
1029 int r, oldspeed = c->speed;
1031 r = chn_tryspeed(c, speed);
1033 DEB(kprintf("Failed to set speed %d falling back to %d\n", speed, oldspeed));
1034 r = chn_tryspeed(c, oldspeed);
1040 chn_tryformat(struct pcm_channel *c, u_int32_t fmt)
1042 struct snd_dbuf *b = c->bufhard;
1043 struct snd_dbuf *bs = c->bufsoft;
1048 DEB(kprintf("want format %d\n", fmt));
1050 r = chn_buildfeeder(c);
1052 sndbuf_setfmt(bs, c->format);
1054 r = CHANNEL_SETFORMAT(c->methods, c->devinfo, sndbuf_getfmt(b));
1056 r = chn_tryspeed(c, c->speed);
1064 chn_setformat(struct pcm_channel *c, u_int32_t fmt)
1066 u_int32_t oldfmt = c->format;
1069 r = chn_tryformat(c, fmt);
1071 DEB(kprintf("Format change %d failed, reverting to %d\n", fmt, oldfmt));
1072 chn_tryformat(c, oldfmt);
1078 round_bufsz (unsigned int bufsz, unsigned int min, unsigned int max)
1081 if (bufsz < min) bufsz = min;
1082 else if (bufsz > max) bufsz = max;
1084 if (bufsz & (bufsz-1)) {
1085 while (bufsz >> pow) pow++;
1089 if (res > max) return res>>1;
1094 * set the channel's blocksize both for soft and hard buffers.
1096 * blksz should be a power of 2 between 2**4 and 2**16 -- it is useful
1097 * that it has the same value for both bufsoft and bufhard.
1098 * blksz == -1 computes values according to a target irq rate.
1099 * blksz == 0 reuses previous values if available, otherwise
1102 * blkcnt is set by the user, between 2 and (2**17)/blksz for bufsoft,
1103 * but should be a power of 2 for bufhard to simplify life to low
1105 * Note, for the rec channel a large blkcnt is ok,
1106 * but for the play channel we want blksz as small as possible to keep
1107 * the delay small, because routines in the write path always try to
1108 * keep bufhard full.
1110 * Unless we have good reason to, use the values suggested by the caller.
1113 chn_setblocksize(struct pcm_channel *c, int blkcnt, int blksz)
1115 struct snd_dbuf *b = c->bufhard;
1116 struct snd_dbuf *bs = c->bufsoft;
1117 int irqhz, ret, maxsz, maxsize, reqblksz;
1120 if (!CANCHANGE(c) || (c->flags & CHN_F_MAPPED)) {
1121 KASSERT(sndbuf_getsize(bs) == 0 ||
1122 sndbuf_getsize(bs) >= sndbuf_getsize(b),
1123 ("%s(%s): bufsoft size %d < bufhard size %d", __func__,
1124 c->name, sndbuf_getsize(bs), sndbuf_getsize(b)));
1127 c->flags |= CHN_F_SETBLOCKSIZE;
1130 DEB(kprintf("%s(%d, %d)\n", __func__, blkcnt, blksz));
1131 if (blksz == 0 || blksz == -1) { /* let the driver choose values */
1132 if (blksz == -1) /* delete previous values */
1133 c->flags &= ~CHN_F_HAS_SIZE;
1134 if (!(c->flags & CHN_F_HAS_SIZE)) { /* no previous value */
1136 * compute a base blksz according to the target irq
1137 * rate, then round to a suitable power of 2
1138 * in the range 16.. 2^17/2.
1139 * Finally compute a suitable blkcnt.
1141 blksz = round_bufsz( (sndbuf_getbps(bs) *
1142 sndbuf_getspd(bs)) / chn_targetirqrate,
1143 16, CHN_2NDBUFMAXSIZE / 2);
1144 blkcnt = CHN_2NDBUFMAXSIZE / blksz;
1145 } else { /* use previously defined value */
1146 blkcnt = sndbuf_getblkcnt(bs);
1147 blksz = sndbuf_getblksz(bs);
1151 * use supplied values if reasonable. Note that here we
1152 * might have blksz which is not a power of 2 if the
1153 * ioctl() to compute it allows such values.
1156 if ((blksz < 16) || (blkcnt < 2) || (blkcnt * blksz > CHN_2NDBUFMAXSIZE))
1159 c->flags |= CHN_F_HAS_SIZE;
1163 if (reqblksz < sndbuf_getbps(bs))
1164 reqblksz = sndbuf_getbps(bs);
1165 if (reqblksz % sndbuf_getbps(bs))
1166 reqblksz -= reqblksz % sndbuf_getbps(bs);
1168 /* adjust for different hw format/speed */
1170 * Now compute the approx irq rate for the given (soft) blksz,
1171 * reduce to the acceptable range and compute a corresponding blksz
1172 * for the hard buffer. Then set the channel's blocksize and
1173 * corresponding hardbuf value. The number of blocks used should
1174 * be set by the device-specific routine. In fact, even the
1175 * call to sndbuf_setblksz() should not be here! XXX
1178 irqhz = (sndbuf_getbps(bs) * sndbuf_getspd(bs)) / blksz;
1179 RANGE(irqhz, 16, 512);
1181 maxsz = sndbuf_getmaxsize(b);
1182 if (maxsz == 0) /* virtual channels don't appear to allocate bufhard */
1183 maxsz = CHN_2NDBUFMAXSIZE;
1184 blksz = round_bufsz( (sndbuf_getbps(b) * sndbuf_getspd(b)) / irqhz,
1187 /* Increase the size of bufsoft if before increasing bufhard. */
1188 maxsize = sndbuf_getsize(b);
1189 if (sndbuf_getsize(bs) > maxsize)
1190 maxsize = sndbuf_getsize(bs);
1191 if (reqblksz * blkcnt > maxsize)
1192 maxsize = reqblksz * blkcnt;
1193 if (sndbuf_getsize(bs) != maxsize || sndbuf_getblksz(bs) != reqblksz) {
1194 ret = sndbuf_remalloc(bs, maxsize/reqblksz, reqblksz);
1200 sndbuf_setblksz(b, CHANNEL_SETBLOCKSIZE(c->methods, c->devinfo, blksz));
1203 /* Decrease the size of bufsoft after decreasing bufhard. */
1204 maxsize = sndbuf_getsize(b);
1205 if (reqblksz * blkcnt > maxsize)
1206 maxsize = reqblksz * blkcnt;
1207 if (maxsize > sndbuf_getsize(bs))
1208 kprintf("Danger! %s bufsoft size increasing from %d to %d after CHANNEL_SETBLOCKSIZE()\n",
1209 c->name, sndbuf_getsize(bs), maxsize);
1210 if (sndbuf_getsize(bs) != maxsize || sndbuf_getblksz(bs) != reqblksz) {
1211 ret = sndbuf_remalloc(bs, maxsize/reqblksz, reqblksz);
1218 KASSERT(sndbuf_getsize(bs) == 0 ||
1219 sndbuf_getsize(bs) >= sndbuf_getsize(b),
1220 ("%s(%s): bufsoft size %d < bufhard size %d, reqblksz=%d blksz=%d maxsize=%d blkcnt=%d",
1221 __func__, c->name, sndbuf_getsize(bs), sndbuf_getsize(b), reqblksz,
1222 blksz, maxsize, blkcnt));
1224 c->flags &= ~CHN_F_SETBLOCKSIZE;
1227 static uint32_t kk = 0;
1228 printf("%u: b %d/%d/%d : (%d)%d/0x%0x | bs %d/%d/%d : (%d)%d/0x%0x\n", ++kk,
1229 sndbuf_getsize(b), sndbuf_getblksz(b), sndbuf_getblkcnt(b),
1231 sndbuf_getspd(b), sndbuf_getfmt(b),
1232 sndbuf_getsize(bs), sndbuf_getblksz(bs), sndbuf_getblkcnt(bs),
1234 sndbuf_getspd(bs), sndbuf_getfmt(bs));
1235 if (sndbuf_getsize(b) % sndbuf_getbps(b) ||
1236 sndbuf_getblksz(b) % sndbuf_getbps(b) ||
1237 sndbuf_getsize(bs) % sndbuf_getbps(bs) ||
1238 sndbuf_getblksz(b) % sndbuf_getbps(b)) {
1239 printf("%u: bps/blksz alignment screwed!\n", kk);
1247 chn_trigger(struct pcm_channel *c, int go)
1252 ret = CHANNEL_TRIGGER(c->methods, c->devinfo, go);
1258 chn_getptr(struct pcm_channel *c)
1262 int a = (1 << c->align) - 1;
1265 hwptr = (c->flags & CHN_F_TRIGGERED)? CHANNEL_GETPTR(c->methods, c->devinfo) : 0;
1266 /* don't allow unaligned values in the hwa ptr */
1268 hwptr &= ~a ; /* Apply channel align mask */
1270 hwptr &= DMA_ALIGN_MASK; /* Apply DMA align mask */
1276 hwptr = (c->flags & CHN_F_TRIGGERED)? CHANNEL_GETPTR(c->methods, c->devinfo) : 0;
1277 return (hwptr - (hwptr % sndbuf_getbps(c->bufhard)));
1280 struct pcmchan_caps *
1281 chn_getcaps(struct pcm_channel *c)
1284 return CHANNEL_GETCAPS(c->methods, c->devinfo);
1288 chn_getformats(struct pcm_channel *c)
1290 u_int32_t *fmtlist, fmts;
1293 fmtlist = chn_getcaps(c)->fmtlist;
1295 for (i = 0; fmtlist[i]; i++)
1298 /* report software-supported formats */
1299 if (report_soft_formats)
1300 fmts |= AFMT_MU_LAW|AFMT_A_LAW|AFMT_U32_LE|AFMT_U32_BE|
1301 AFMT_S32_LE|AFMT_S32_BE|AFMT_U24_LE|AFMT_U24_BE|
1302 AFMT_S24_LE|AFMT_S24_BE|AFMT_U16_LE|AFMT_U16_BE|
1303 AFMT_S16_LE|AFMT_S16_BE|AFMT_U8|AFMT_S8;
1309 chn_buildfeeder(struct pcm_channel *c)
1311 struct feeder_class *fc;
1312 struct pcm_feederdesc desc;
1313 u_int32_t tmp[2], type, flags, hwfmt, *fmtlist;
1317 while (chn_removefeeder(c) == 0);
1318 KASSERT((c->feeder == NULL), ("feeder chain not empty"));
1320 c->align = sndbuf_getalign(c->bufsoft);
1322 if (SLIST_EMPTY(&c->children)) {
1323 fc = feeder_getclass(NULL);
1324 KASSERT(fc != NULL, ("can't find root feeder"));
1326 err = chn_addfeeder(c, fc, NULL);
1328 DEB(kprintf("can't add root feeder, err %d\n", err));
1332 c->feeder->desc->out = c->format;
1334 if (c->flags & CHN_F_HAS_VCHAN) {
1335 desc.type = FEEDER_MIXER;
1338 DEB(kprintf("can't decide which feeder type to use!\n"));
1341 desc.out = c->format;
1343 fc = feeder_getclass(&desc);
1345 DEB(kprintf("can't find vchan feeder\n"));
1350 err = chn_addfeeder(c, fc, &desc);
1352 DEB(kprintf("can't add vchan feeder, err %d\n", err));
1357 c->feederflags &= ~(1 << FEEDER_VOLUME);
1358 if (c->direction == PCMDIR_PLAY &&
1359 !(c->flags & CHN_F_VIRTUAL) &&
1360 c->parentsnddev && (c->parentsnddev->flags & SD_F_SOFTPCMVOL) &&
1361 c->parentsnddev->mixer_dev)
1362 c->feederflags |= 1 << FEEDER_VOLUME;
1363 flags = c->feederflags;
1364 fmtlist = chn_getcaps(c)->fmtlist;
1366 DEB(kprintf("feederflags %x\n", flags));
1368 for (type = FEEDER_RATE; type <= FEEDER_LAST; type++) {
1369 if (flags & (1 << type)) {
1374 DEB(kprintf("find feeder type %d, ", type));
1375 fc = feeder_getclass(&desc);
1376 DEB(kprintf("got %p\n", fc));
1378 DEB(kprintf("can't find required feeder type %d\n", type));
1383 DEB(kprintf("build fmtchain from 0x%08x to 0x%08x: ", c->feeder->desc->out, fc->desc->in));
1384 tmp[0] = fc->desc->in;
1386 if (chn_fmtchain(c, tmp) == 0) {
1387 DEB(kprintf("failed\n"));
1391 DEB(kprintf("ok\n"));
1393 err = chn_addfeeder(c, fc, fc->desc);
1395 DEB(kprintf("can't add feeder %p, output 0x%x, err %d\n", fc, fc->desc->out, err));
1399 DEB(kprintf("added feeder %p, output 0x%x\n", fc, c->feeder->desc->out));
1403 if (c->direction == PCMDIR_REC) {
1406 hwfmt = chn_fmtchain(c, tmp);
1408 hwfmt = chn_fmtchain(c, fmtlist);
1410 if (hwfmt == 0 || !fmtvalid(hwfmt, fmtlist)) {
1411 DEB(kprintf("Invalid hardware format: 0x%08x\n", hwfmt));
1415 sndbuf_setfmt(c->bufhard, hwfmt);
1417 if ((flags & (1 << FEEDER_VOLUME))) {
1418 struct dev_ioctl_args map;
1419 u_int32_t parent = SOUND_MIXER_NONE;
1420 int vol, left, right;
1422 vol = 100 | (100 << 8);
1426 * XXX This is ugly! The way mixer subs being so secretive
1427 * about its own internals force us to use this silly
1430 map.a_head.a_dev = c->parentsnddev->mixer_dev;
1431 map.a_cmd = MIXER_READ(SOUND_MIXER_PCM);
1432 map.a_data = (caddr_t)&vol;
1435 map.a_sysmsg = NULL;
1436 if (mixer_ioctl(&map) != 0)
1437 device_printf(c->dev, "Soft PCM Volume: Failed to read default value\n");
1439 right = (vol >> 8) & 0x7f;
1440 if (c->parentsnddev != NULL &&
1441 c->parentsnddev->mixer_dev != NULL &&
1442 c->parentsnddev->mixer_dev->si_drv1 != NULL)
1443 parent = mix_getparent(
1444 c->parentsnddev->mixer_dev->si_drv1,
1446 if (parent != SOUND_MIXER_NONE) {
1447 vol = 100 | (100 << 8);
1448 map.a_head.a_dev = c->parentsnddev->mixer_dev;
1449 map.a_cmd = MIXER_READ(parent);
1450 map.a_data = (caddr_t)&vol;
1453 if (mixer_ioctl(&map) != 0)
1454 device_printf(c->dev, "Soft Volume: Failed to read parent default value\n");
1455 left = (left * (vol & 0x7f)) / 100;
1456 right = (right * ((vol >> 8) & 0x7f)) / 100;
1460 chn_setvolume(c, left, right);
1467 chn_notify(struct pcm_channel *c, u_int32_t flags)
1469 struct pcmchan_children *pce;
1470 struct pcm_channel *child;
1475 if (SLIST_EMPTY(&c->children)) {
1480 run = (c->flags & CHN_F_TRIGGERED)? 1 : 0;
1482 * if the hwchan is running, we can't change its rate, format or
1486 flags &= CHN_N_VOLUME | CHN_N_TRIGGER;
1488 if (flags & CHN_N_RATE) {
1490 * we could do something here, like scan children and decide on
1491 * the most appropriate rate to mix at, but we don't for now
1494 if (flags & CHN_N_FORMAT) {
1496 * we could do something here, like scan children and decide on
1497 * the most appropriate mixer feeder to use, but we don't for now
1500 if (flags & CHN_N_VOLUME) {
1502 * we could do something here but we don't for now
1505 if (flags & CHN_N_BLOCKSIZE) {
1508 * scan the children, find the lowest blocksize and use that
1509 * for the hard blocksize
1511 blksz = sndbuf_getmaxsize(c->bufhard) / 2;
1512 SLIST_FOREACH(pce, &c->children, link) {
1513 child = pce->channel;
1515 if (sndbuf_getblksz(child->bufhard) < blksz)
1516 blksz = sndbuf_getblksz(child->bufhard);
1519 chn_setblocksize(c, 2, blksz);
1521 if (flags & CHN_N_TRIGGER) {
1524 * scan the children, and figure out if any are running
1525 * if so, we need to be running, otherwise we need to be stopped
1526 * if we aren't in our target sstate, move to it
1529 SLIST_FOREACH(pce, &c->children, link) {
1530 child = pce->channel;
1532 if (child->flags & CHN_F_TRIGGERED)
1546 chn_lock(struct pcm_channel *c)
1552 chn_unlock(struct pcm_channel *c)