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Create releng/7.2 from stable/7 in preparation for 7.2-RELEASE.
[FreeBSD/releng/7.2.git] / sys / dev / sound / pcm / channel.h
1 /*-
2  * Copyright (c) 1999 Cameron Grant <cg@freebsd.org>
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  * $FreeBSD$
27  */
28
29 struct pcmchan_caps {
30         u_int32_t minspeed, maxspeed;
31         u_int32_t *fmtlist;
32         u_int32_t caps;
33 };
34
35 /* Forward declarations */
36 struct pcm_channel;
37 struct pcmchan_syncgroup;
38 struct pcmchan_syncmember;
39
40 extern struct mtx snd_pcm_syncgroups_mtx;
41 extern SLIST_HEAD(pcm_synclist, pcmchan_syncgroup) snd_pcm_syncgroups;
42
43 #define PCM_SG_LOCK()       mtx_lock(&snd_pcm_syncgroups_mtx)
44 #define PCM_SG_TRYLOCK()    mtx_trylock(&snd_pcm_syncgroups_mtx)
45 #define PCM_SG_UNLOCK()     mtx_unlock(&snd_pcm_syncgroups_mtx)
46 #define PCM_SG_LOCKASSERT(arg)  mtx_assert(&snd_pcm_syncgroups_mtx, arg)
47
48 /**
49  * @brief Specifies an audio device sync group
50  */
51 struct pcmchan_syncgroup {
52         SLIST_ENTRY(pcmchan_syncgroup) link;
53         SLIST_HEAD(, pcmchan_syncmember) members;
54         int id; /**< Group identifier; set to address of group. */
55 };
56
57 /**
58  * @brief Specifies a container for members of a sync group
59  */
60 struct pcmchan_syncmember {
61         SLIST_ENTRY(pcmchan_syncmember) link;
62         struct pcmchan_syncgroup *parent; /**< group head */
63         struct pcm_channel *ch;
64 };
65
66 #define CHN_NAMELEN     32
67 struct pcm_channel {
68         kobj_t methods;
69
70         pid_t pid;
71         int refcount;
72         struct pcm_feeder *feeder;
73         u_int32_t align;
74
75         int volume;
76         int latency;
77         u_int32_t speed;
78         u_int32_t format;
79         u_int32_t flags;
80         u_int32_t feederflags;
81         u_int32_t blocks;
82
83         int direction;
84         unsigned int interrupts, xruns, feedcount;
85         unsigned int timeout;
86         struct snd_dbuf *bufhard, *bufsoft;
87         struct snddev_info *parentsnddev;
88         struct pcm_channel *parentchannel;
89         void *devinfo;
90         device_t dev;
91         int unit;
92         char name[CHN_NAMELEN];
93         struct mtx *lock;
94         int trigger;
95         /**
96          * For interrupt manipulations.
97          */
98         struct cv intr_cv;
99         /**
100          * Increment,decrement this around operations that temporarily yield
101          * lock.
102          */
103         unsigned int inprog;
104         /**
105          * Special channel operations should examine @c inprog after acquiring
106          * lock.  If zero, operations may continue.  Else, thread should
107          * wait on this cv for previous operation to finish.
108          */
109         struct cv cv;
110         /**
111          * Low water mark for select()/poll().
112          *
113          * This is initialized to the channel's fragment size, and will be
114          * overwritten if a new fragment size is set.  Users may alter this
115          * value directly with the @c SNDCTL_DSP_LOW_WATER ioctl.
116          */
117         unsigned int lw;
118         /**
119          * If part of a sync group, this will point to the syncmember
120          * container.
121          */
122         struct pcmchan_syncmember *sm;
123 #ifdef OSSV4_EXPERIMENT
124         u_int16_t lpeak, rpeak; /**< Peak value from 0-32767. */
125 #endif
126
127         struct {
128                 SLIST_HEAD(, pcm_channel) head;
129                 SLIST_ENTRY(pcm_channel) link;
130                 struct {
131                         SLIST_HEAD(, pcm_channel) head;
132                         SLIST_ENTRY(pcm_channel) link;
133                 } busy;
134         } children;
135
136         struct {
137                 struct {
138                         SLIST_ENTRY(pcm_channel) link;
139                         struct {
140                                 SLIST_ENTRY(pcm_channel) link;
141                         } busy;
142                 } pcm;
143         } channels;
144
145         void *data1, *data2;
146 };
147
148 #define CHN_HEAD(x, y)                  &(x)->y.head
149 #define CHN_INIT(x, y)                  SLIST_INIT(CHN_HEAD(x, y))
150 #define CHN_LINK(y)                     y.link
151 #define CHN_EMPTY(x, y)                 SLIST_EMPTY(CHN_HEAD(x, y))
152 #define CHN_FIRST(x, y)                 SLIST_FIRST(CHN_HEAD(x, y))
153
154 #define CHN_FOREACH(x, y, z)                                            \
155         SLIST_FOREACH(x, CHN_HEAD(y, z), CHN_LINK(z))
156
157 #define CHN_FOREACH_SAFE(w, x, y, z)                                    \
158         SLIST_FOREACH_SAFE(w, CHN_HEAD(x, z), CHN_LINK(z), y)
159
160 #define CHN_INSERT_HEAD(x, y, z)                                        \
161         SLIST_INSERT_HEAD(CHN_HEAD(x, z), y, CHN_LINK(z))
162
163 #define CHN_INSERT_AFTER(x, y, z)                                       \
164         SLIST_INSERT_AFTER(x, y, CHN_LINK(z))
165
166 #define CHN_REMOVE(x, y, z)                                             \
167         SLIST_REMOVE(CHN_HEAD(x, z), y, pcm_channel, CHN_LINK(z))
168
169 #define CHN_INSERT_HEAD_SAFE(x, y, z)           do {                    \
170         struct pcm_channel *t = NULL;                                   \
171         CHN_FOREACH(t, x, z) {                                          \
172                 if (t == y)                                             \
173                         break;                                          \
174         }                                                               \
175         if (t != y) {                                                   \
176                 CHN_INSERT_HEAD(x, y, z);                               \
177         }                                                               \
178 } while(0)
179
180 #define CHN_INSERT_AFTER_SAFE(w, x, y, z)       do {                    \
181         struct pcm_channel *t = NULL;                                   \
182         CHN_FOREACH(t, w, z) {                                          \
183                 if (t == y)                                             \
184                         break;                                          \
185         }                                                               \
186         if (t != y) {                                                   \
187                 CHN_INSERT_AFTER(x, y, z);                              \
188         }                                                               \
189 } while(0)
190
191 #define CHN_REMOVE_SAFE(x, y, z)                do {                    \
192         struct pcm_channel *t = NULL;                                   \
193         CHN_FOREACH(t, x, z) {                                          \
194                 if (t == y)                                             \
195                         break;                                          \
196         }                                                               \
197         if (t == y) {                                                   \
198                 CHN_REMOVE(x, y, z);                                    \
199         }                                                               \
200 } while(0)
201
202 #define CHN_UNIT(x)     (snd_unit2u((x)->unit))
203 #define CHN_DEV(x)      (snd_unit2d((x)->unit))
204 #define CHN_CHAN(x)     (snd_unit2c((x)->unit))
205
206 #define CHN_BUF_PARENT(x, y)                                            \
207         (((x) != NULL && (x)->parentchannel != NULL &&                  \
208         (x)->parentchannel->bufhard != NULL) ?                          \
209         (x)->parentchannel->bufhard : (y))
210
211 #define CHN_BROADCAST(x)        do {                                    \
212         if ((x)->cv_waiters != 0)                                       \
213                 cv_broadcastpri(x, PRIBIO);                             \
214 } while(0)
215
216 #include "channel_if.h"
217
218 int chn_reinit(struct pcm_channel *c);
219 int chn_write(struct pcm_channel *c, struct uio *buf);
220 int chn_read(struct pcm_channel *c, struct uio *buf);
221 u_int32_t chn_start(struct pcm_channel *c, int force);
222 int chn_sync(struct pcm_channel *c, int threshold);
223 int chn_flush(struct pcm_channel *c);
224 int chn_poll(struct pcm_channel *c, int ev, struct thread *td);
225
226 int chn_init(struct pcm_channel *c, void *devinfo, int dir, int direction);
227 int chn_kill(struct pcm_channel *c);
228 int chn_setdir(struct pcm_channel *c, int dir);
229 int chn_reset(struct pcm_channel *c, u_int32_t fmt);
230 int chn_setvolume(struct pcm_channel *c, int left, int right);
231 int chn_setspeed(struct pcm_channel *c, int speed);
232 int chn_setformat(struct pcm_channel *c, u_int32_t fmt);
233 int chn_setblocksize(struct pcm_channel *c, int blkcnt, int blksz);
234 int chn_setlatency(struct pcm_channel *c, int latency);
235 int chn_trigger(struct pcm_channel *c, int go);
236 int chn_getptr(struct pcm_channel *c);
237 struct pcmchan_caps *chn_getcaps(struct pcm_channel *c);
238 u_int32_t chn_getformats(struct pcm_channel *c);
239
240 void chn_resetbuf(struct pcm_channel *c);
241 void chn_intr(struct pcm_channel *c);
242 int chn_wrfeed(struct pcm_channel *c);
243 int chn_rdfeed(struct pcm_channel *c);
244 int chn_abort(struct pcm_channel *c);
245
246 void chn_wrupdate(struct pcm_channel *c);
247 void chn_rdupdate(struct pcm_channel *c);
248
249 int chn_notify(struct pcm_channel *c, u_int32_t flags);
250 void chn_lock(struct pcm_channel *c);
251 void chn_unlock(struct pcm_channel *c);
252
253 int chn_getrates(struct pcm_channel *c, int **rates);
254 int chn_syncdestroy(struct pcm_channel *c);
255
256 #ifdef OSSV4_EXPERIMENT
257 int chn_getpeaks(struct pcm_channel *c, int *lpeak, int *rpeak);
258 #endif
259
260 #ifdef  USING_MUTEX
261 #define CHN_LOCK(c) mtx_lock((struct mtx *)((c)->lock))
262 #define CHN_UNLOCK(c) mtx_unlock((struct mtx *)((c)->lock))
263 #define CHN_TRYLOCK(c) mtx_trylock((struct mtx *)((c)->lock))
264 #define CHN_LOCKASSERT(c) mtx_assert((struct mtx *)((c)->lock), MA_OWNED)
265 #else
266 #define CHN_LOCK(c)
267 #define CHN_UNLOCK(c)
268 #define CHN_TRYLOCK(c)
269 #define CHN_LOCKASSERT(c)
270 #endif
271
272 int fmtvalid(u_int32_t fmt, u_int32_t *fmtlist);
273
274 #define AFMTSTR_NONE            0 /* "s16le" */
275 #define AFMTSTR_SIMPLE          1 /* "s16le:s" */
276 #define AFMTSTR_NUM             2 /* "s16le:2" */
277 #define AFMTSTR_FULL            3 /* "s16le:stereo" */
278
279 #define AFMTSTR_MAXSZ           13 /* include null terminator */
280
281 #define AFMTSTR_MONO_RETURN     0
282 #define AFMTSTR_STEREO_RETURN   1
283
284 struct afmtstr_table {
285         char *fmtstr;
286         u_int32_t format;
287 };
288
289 int afmtstr_swap_sign(char *);
290 int afmtstr_swap_endian(char *);
291 u_int32_t afmtstr2afmt(struct afmtstr_table *, const char *, int);
292 u_int32_t afmt2afmtstr(struct afmtstr_table *, u_int32_t, char *, size_t, int, int);
293
294 extern int chn_latency;
295 extern int chn_latency_profile;
296 extern int report_soft_formats;
297
298 #define PCMDIR_FAKE             0
299 #define PCMDIR_PLAY             1
300 #define PCMDIR_PLAY_VIRTUAL     2
301 #define PCMDIR_REC              -1
302 #define PCMDIR_REC_VIRTUAL      -2
303
304 #define PCMTRIG_START 1
305 #define PCMTRIG_EMLDMAWR 2
306 #define PCMTRIG_EMLDMARD 3
307 #define PCMTRIG_STOP 0
308 #define PCMTRIG_ABORT -1
309
310 #define PCMTRIG_COMMON(x)       ((x) == PCMTRIG_START ||                \
311                                  (x) == PCMTRIG_STOP ||                 \
312                                  (x) == PCMTRIG_ABORT)
313
314 #define CHN_F_CLOSING           0x00000004  /* a pending close */
315 #define CHN_F_ABORTING          0x00000008  /* a pending abort */
316 #define CHN_F_RUNNING           0x00000010  /* dma is running */
317 #define CHN_F_TRIGGERED         0x00000020
318 #define CHN_F_NOTRIGGER         0x00000040
319 #define CHN_F_SLEEPING          0x00000080
320
321 #define CHN_F_BUSY              0x00001000  /* has been opened  */
322 #define CHN_F_HAS_SIZE          0x00002000  /* user set block size */
323 #define CHN_F_NBIO              0x00004000  /* do non-blocking i/o */
324 #define CHN_F_MAPPED            0x00010000  /* has been mmap()ed */
325 #define CHN_F_DEAD              0x00020000
326 #define CHN_F_BADSETTING        0x00040000
327 #define CHN_F_SETBLOCKSIZE      0x00080000
328 #define CHN_F_HAS_VCHAN         0x00100000
329
330 #define CHN_F_VIRTUAL           0x10000000  /* not backed by hardware */
331
332 #define CHN_F_RESET             (CHN_F_BUSY | CHN_F_DEAD |              \
333                                  CHN_F_HAS_VCHAN | CHN_F_VIRTUAL)
334
335 #define CHN_F_MMAP_INVALID      (CHN_F_DEAD | CHN_F_RUNNING)
336
337                                         
338
339 #define CHN_N_RATE              0x00000001
340 #define CHN_N_FORMAT            0x00000002
341 #define CHN_N_VOLUME            0x00000004
342 #define CHN_N_BLOCKSIZE         0x00000008
343 #define CHN_N_TRIGGER           0x00000010
344
345 #define CHN_LATENCY_MIN         0
346 #define CHN_LATENCY_MAX         10
347 #define CHN_LATENCY_DEFAULT     5
348 #define CHN_POLICY_MIN          CHN_LATENCY_MIN
349 #define CHN_POLICY_MAX          CHN_LATENCY_MAX
350 #define CHN_POLICY_DEFAULT      CHN_LATENCY_DEFAULT
351
352 #define CHN_LATENCY_PROFILE_MIN         0
353 #define CHN_LATENCY_PROFILE_MAX         1
354 #define CHN_LATENCY_PROFILE_DEFAULT     CHN_LATENCY_PROFILE_MAX
355
356 #define CHN_STARTED(c)          ((c)->flags & CHN_F_TRIGGERED)
357 #define CHN_STOPPED(c)          (!CHN_STARTED(c))
358 #define CHN_DIRSTR(c)           (((c)->direction == PCMDIR_PLAY) ? \
359                                 "PCMDIR_PLAY" : "PCMDIR_REC")
360
361 #define CHN_TIMEOUT             5
362 #define CHN_TIMEOUT_MIN         1
363 #define CHN_TIMEOUT_MAX         10
364
365 /*
366  * This should be large enough to hold all pcm data between
367  * tsleeps in chn_{read,write} at the highest sample rate.
368  * (which is usually 48kHz * 16bit * stereo = 192000 bytes/sec)
369  */
370 #define CHN_2NDBUFBLKSIZE       (2 * 1024)
371 /* The total number of blocks per secondary bufhard. */
372 #define CHN_2NDBUFBLKNUM        (32)
373 /* The size of a whole secondary bufhard. */
374 #define CHN_2NDBUFMAXSIZE       (131072)
375
376 #define CHANNEL_DECLARE(name) static DEFINE_CLASS(name, name ## _methods, sizeof(struct kobj))