11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Digital Audio (PCM) abstract layer 3c1017a4cSJaroslav Kysela * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 41da177e4SLinus Torvalds * Abramo Bagnara <abramo@alsa-project.org> 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * 71da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 81da177e4SLinus Torvalds * it under the terms of the GNU General Public License as published by 91da177e4SLinus Torvalds * the Free Software Foundation; either version 2 of the License, or 101da177e4SLinus Torvalds * (at your option) any later version. 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * This program is distributed in the hope that it will be useful, 131da177e4SLinus Torvalds * but WITHOUT ANY WARRANTY; without even the implied warranty of 141da177e4SLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 151da177e4SLinus Torvalds * GNU General Public License for more details. 161da177e4SLinus Torvalds * 171da177e4SLinus Torvalds * You should have received a copy of the GNU General Public License 181da177e4SLinus Torvalds * along with this program; if not, write to the Free Software 191da177e4SLinus Torvalds * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 201da177e4SLinus Torvalds * 211da177e4SLinus Torvalds */ 221da177e4SLinus Torvalds 231da177e4SLinus Torvalds #include <linux/slab.h> 241da177e4SLinus Torvalds #include <linux/time.h> 253f7440a6STakashi Iwai #include <linux/math64.h> 261da177e4SLinus Torvalds #include <sound/core.h> 271da177e4SLinus Torvalds #include <sound/control.h> 281da177e4SLinus Torvalds #include <sound/info.h> 291da177e4SLinus Torvalds #include <sound/pcm.h> 301da177e4SLinus Torvalds #include <sound/pcm_params.h> 311da177e4SLinus Torvalds #include <sound/timer.h> 321da177e4SLinus Torvalds 331da177e4SLinus Torvalds /* 341da177e4SLinus Torvalds * fill ring buffer with silence 351da177e4SLinus Torvalds * runtime->silence_start: starting pointer to silence area 361da177e4SLinus Torvalds * runtime->silence_filled: size filled with silence 371da177e4SLinus Torvalds * runtime->silence_threshold: threshold from application 381da177e4SLinus Torvalds * runtime->silence_size: maximal size from application 391da177e4SLinus Torvalds * 401da177e4SLinus Torvalds * when runtime->silence_size >= runtime->boundary - fill processed area with silence immediately 411da177e4SLinus Torvalds */ 42877211f5STakashi Iwai void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr) 431da177e4SLinus Torvalds { 44877211f5STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 451da177e4SLinus Torvalds snd_pcm_uframes_t frames, ofs, transfer; 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds if (runtime->silence_size < runtime->boundary) { 481da177e4SLinus Torvalds snd_pcm_sframes_t noise_dist, n; 491da177e4SLinus Torvalds if (runtime->silence_start != runtime->control->appl_ptr) { 501da177e4SLinus Torvalds n = runtime->control->appl_ptr - runtime->silence_start; 511da177e4SLinus Torvalds if (n < 0) 521da177e4SLinus Torvalds n += runtime->boundary; 531da177e4SLinus Torvalds if ((snd_pcm_uframes_t)n < runtime->silence_filled) 541da177e4SLinus Torvalds runtime->silence_filled -= n; 551da177e4SLinus Torvalds else 561da177e4SLinus Torvalds runtime->silence_filled = 0; 571da177e4SLinus Torvalds runtime->silence_start = runtime->control->appl_ptr; 581da177e4SLinus Torvalds } 59235475cbSTakashi Iwai if (runtime->silence_filled >= runtime->buffer_size) 601da177e4SLinus Torvalds return; 611da177e4SLinus Torvalds noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled; 621da177e4SLinus Torvalds if (noise_dist >= (snd_pcm_sframes_t) runtime->silence_threshold) 631da177e4SLinus Torvalds return; 641da177e4SLinus Torvalds frames = runtime->silence_threshold - noise_dist; 651da177e4SLinus Torvalds if (frames > runtime->silence_size) 661da177e4SLinus Torvalds frames = runtime->silence_size; 671da177e4SLinus Torvalds } else { 681da177e4SLinus Torvalds if (new_hw_ptr == ULONG_MAX) { /* initialization */ 691da177e4SLinus Torvalds snd_pcm_sframes_t avail = snd_pcm_playback_hw_avail(runtime); 709e216e8aSJaroslav Kysela if (avail > runtime->buffer_size) 719e216e8aSJaroslav Kysela avail = runtime->buffer_size; 721da177e4SLinus Torvalds runtime->silence_filled = avail > 0 ? avail : 0; 731da177e4SLinus Torvalds runtime->silence_start = (runtime->status->hw_ptr + 741da177e4SLinus Torvalds runtime->silence_filled) % 751da177e4SLinus Torvalds runtime->boundary; 761da177e4SLinus Torvalds } else { 771da177e4SLinus Torvalds ofs = runtime->status->hw_ptr; 781da177e4SLinus Torvalds frames = new_hw_ptr - ofs; 791da177e4SLinus Torvalds if ((snd_pcm_sframes_t)frames < 0) 801da177e4SLinus Torvalds frames += runtime->boundary; 811da177e4SLinus Torvalds runtime->silence_filled -= frames; 821da177e4SLinus Torvalds if ((snd_pcm_sframes_t)runtime->silence_filled < 0) { 831da177e4SLinus Torvalds runtime->silence_filled = 0; 849a826ddbSClemens Ladisch runtime->silence_start = new_hw_ptr; 851da177e4SLinus Torvalds } else { 869a826ddbSClemens Ladisch runtime->silence_start = ofs; 871da177e4SLinus Torvalds } 881da177e4SLinus Torvalds } 891da177e4SLinus Torvalds frames = runtime->buffer_size - runtime->silence_filled; 901da177e4SLinus Torvalds } 917eaa943cSTakashi Iwai if (snd_BUG_ON(frames > runtime->buffer_size)) 927eaa943cSTakashi Iwai return; 931da177e4SLinus Torvalds if (frames == 0) 941da177e4SLinus Torvalds return; 959a826ddbSClemens Ladisch ofs = runtime->silence_start % runtime->buffer_size; 961da177e4SLinus Torvalds while (frames > 0) { 971da177e4SLinus Torvalds transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames; 981da177e4SLinus Torvalds if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || 991da177e4SLinus Torvalds runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) { 1001da177e4SLinus Torvalds if (substream->ops->silence) { 1011da177e4SLinus Torvalds int err; 1021da177e4SLinus Torvalds err = substream->ops->silence(substream, -1, ofs, transfer); 1037eaa943cSTakashi Iwai snd_BUG_ON(err < 0); 1041da177e4SLinus Torvalds } else { 1051da177e4SLinus Torvalds char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, ofs); 1061da177e4SLinus Torvalds snd_pcm_format_set_silence(runtime->format, hwbuf, transfer * runtime->channels); 1071da177e4SLinus Torvalds } 1081da177e4SLinus Torvalds } else { 1091da177e4SLinus Torvalds unsigned int c; 1101da177e4SLinus Torvalds unsigned int channels = runtime->channels; 1111da177e4SLinus Torvalds if (substream->ops->silence) { 1121da177e4SLinus Torvalds for (c = 0; c < channels; ++c) { 1131da177e4SLinus Torvalds int err; 1141da177e4SLinus Torvalds err = substream->ops->silence(substream, c, ofs, transfer); 1157eaa943cSTakashi Iwai snd_BUG_ON(err < 0); 1161da177e4SLinus Torvalds } 1171da177e4SLinus Torvalds } else { 1181da177e4SLinus Torvalds size_t dma_csize = runtime->dma_bytes / channels; 1191da177e4SLinus Torvalds for (c = 0; c < channels; ++c) { 1201da177e4SLinus Torvalds char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, ofs); 1211da177e4SLinus Torvalds snd_pcm_format_set_silence(runtime->format, hwbuf, transfer); 1221da177e4SLinus Torvalds } 1231da177e4SLinus Torvalds } 1241da177e4SLinus Torvalds } 1251da177e4SLinus Torvalds runtime->silence_filled += transfer; 1261da177e4SLinus Torvalds frames -= transfer; 1271da177e4SLinus Torvalds ofs = 0; 1281da177e4SLinus Torvalds } 1291da177e4SLinus Torvalds } 1301da177e4SLinus Torvalds 131c0070110STakashi Iwai static void pcm_debug_name(struct snd_pcm_substream *substream, 132c0070110STakashi Iwai char *name, size_t len) 1331da177e4SLinus Torvalds { 134c0070110STakashi Iwai snprintf(name, len, "pcmC%dD%d%c:%d", 1351da177e4SLinus Torvalds substream->pcm->card->number, 1361da177e4SLinus Torvalds substream->pcm->device, 137c0070110STakashi Iwai substream->stream ? 'c' : 'p', 138c0070110STakashi Iwai substream->number); 139c0070110STakashi Iwai } 140c0070110STakashi Iwai 1414d96eb25SJaroslav Kysela #define XRUN_DEBUG_BASIC (1<<0) 1424d96eb25SJaroslav Kysela #define XRUN_DEBUG_STACK (1<<1) /* dump also stack */ 1434d96eb25SJaroslav Kysela #define XRUN_DEBUG_JIFFIESCHECK (1<<2) /* do jiffies check */ 1444d96eb25SJaroslav Kysela #define XRUN_DEBUG_PERIODUPDATE (1<<3) /* full period update info */ 1454d96eb25SJaroslav Kysela #define XRUN_DEBUG_HWPTRUPDATE (1<<4) /* full hwptr update info */ 1464d96eb25SJaroslav Kysela #define XRUN_DEBUG_LOG (1<<5) /* show last 10 positions on err */ 1474d96eb25SJaroslav Kysela #define XRUN_DEBUG_LOGONCE (1<<6) /* do above only once */ 1484d96eb25SJaroslav Kysela 1494d96eb25SJaroslav Kysela #ifdef CONFIG_SND_PCM_XRUN_DEBUG 1504d96eb25SJaroslav Kysela 1514d96eb25SJaroslav Kysela #define xrun_debug(substream, mask) \ 1524d96eb25SJaroslav Kysela ((substream)->pstr->xrun_debug & (mask)) 1530f17014bSJarkko Nikula #else 1540f17014bSJarkko Nikula #define xrun_debug(substream, mask) 0 1550f17014bSJarkko Nikula #endif 1564d96eb25SJaroslav Kysela 1574d96eb25SJaroslav Kysela #define dump_stack_on_xrun(substream) do { \ 1584d96eb25SJaroslav Kysela if (xrun_debug(substream, XRUN_DEBUG_STACK)) \ 1594d96eb25SJaroslav Kysela dump_stack(); \ 1604d96eb25SJaroslav Kysela } while (0) 1614d96eb25SJaroslav Kysela 1621da177e4SLinus Torvalds static void xrun(struct snd_pcm_substream *substream) 1631da177e4SLinus Torvalds { 16413f040f9SJaroslav Kysela struct snd_pcm_runtime *runtime = substream->runtime; 16513f040f9SJaroslav Kysela 16613f040f9SJaroslav Kysela if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) 16713f040f9SJaroslav Kysela snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); 1681da177e4SLinus Torvalds snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); 169741b20cfSJaroslav Kysela if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { 170c0070110STakashi Iwai char name[16]; 171c0070110STakashi Iwai pcm_debug_name(substream, name, sizeof(name)); 172c0070110STakashi Iwai snd_printd(KERN_DEBUG "XRUN: %s\n", name); 173ed3da3d9STakashi Iwai dump_stack_on_xrun(substream); 1741da177e4SLinus Torvalds } 1751da177e4SLinus Torvalds } 1761da177e4SLinus Torvalds 1770f17014bSJarkko Nikula #ifdef CONFIG_SND_PCM_XRUN_DEBUG 1784d96eb25SJaroslav Kysela #define hw_ptr_error(substream, fmt, args...) \ 1794d96eb25SJaroslav Kysela do { \ 1804d96eb25SJaroslav Kysela if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { \ 181f240406bSJaroslav Kysela xrun_log_show(substream); \ 1824d96eb25SJaroslav Kysela if (printk_ratelimit()) { \ 1834d96eb25SJaroslav Kysela snd_printd("PCM: " fmt, ##args); \ 1844d96eb25SJaroslav Kysela } \ 1854d96eb25SJaroslav Kysela dump_stack_on_xrun(substream); \ 1864d96eb25SJaroslav Kysela } \ 1874d96eb25SJaroslav Kysela } while (0) 1884d96eb25SJaroslav Kysela 1894d96eb25SJaroslav Kysela #define XRUN_LOG_CNT 10 1904d96eb25SJaroslav Kysela 1914d96eb25SJaroslav Kysela struct hwptr_log_entry { 192ec08b144SBen Gardiner unsigned int in_interrupt; 1934d96eb25SJaroslav Kysela unsigned long jiffies; 1941da177e4SLinus Torvalds snd_pcm_uframes_t pos; 1954d96eb25SJaroslav Kysela snd_pcm_uframes_t period_size; 1964d96eb25SJaroslav Kysela snd_pcm_uframes_t buffer_size; 1974d96eb25SJaroslav Kysela snd_pcm_uframes_t old_hw_ptr; 1984d96eb25SJaroslav Kysela snd_pcm_uframes_t hw_ptr_base; 1994d96eb25SJaroslav Kysela }; 2001da177e4SLinus Torvalds 2014d96eb25SJaroslav Kysela struct snd_pcm_hwptr_log { 2024d96eb25SJaroslav Kysela unsigned int idx; 2034d96eb25SJaroslav Kysela unsigned int hit: 1; 2044d96eb25SJaroslav Kysela struct hwptr_log_entry entries[XRUN_LOG_CNT]; 2054d96eb25SJaroslav Kysela }; 2064d96eb25SJaroslav Kysela 2074d96eb25SJaroslav Kysela static void xrun_log(struct snd_pcm_substream *substream, 208ec08b144SBen Gardiner snd_pcm_uframes_t pos, int in_interrupt) 2094d96eb25SJaroslav Kysela { 2104d96eb25SJaroslav Kysela struct snd_pcm_runtime *runtime = substream->runtime; 2114d96eb25SJaroslav Kysela struct snd_pcm_hwptr_log *log = runtime->hwptr_log; 2124d96eb25SJaroslav Kysela struct hwptr_log_entry *entry; 2134d96eb25SJaroslav Kysela 2144d96eb25SJaroslav Kysela if (log == NULL) { 2154d96eb25SJaroslav Kysela log = kzalloc(sizeof(*log), GFP_ATOMIC); 2164d96eb25SJaroslav Kysela if (log == NULL) 2174d96eb25SJaroslav Kysela return; 2184d96eb25SJaroslav Kysela runtime->hwptr_log = log; 2194d96eb25SJaroslav Kysela } else { 2204d96eb25SJaroslav Kysela if (xrun_debug(substream, XRUN_DEBUG_LOGONCE) && log->hit) 2214d96eb25SJaroslav Kysela return; 2224d96eb25SJaroslav Kysela } 2234d96eb25SJaroslav Kysela entry = &log->entries[log->idx]; 224ec08b144SBen Gardiner entry->in_interrupt = in_interrupt; 2254d96eb25SJaroslav Kysela entry->jiffies = jiffies; 2264d96eb25SJaroslav Kysela entry->pos = pos; 2274d96eb25SJaroslav Kysela entry->period_size = runtime->period_size; 228c80c1d54SJoe Perches entry->buffer_size = runtime->buffer_size; 2294d96eb25SJaroslav Kysela entry->old_hw_ptr = runtime->status->hw_ptr; 2304d96eb25SJaroslav Kysela entry->hw_ptr_base = runtime->hw_ptr_base; 2314d96eb25SJaroslav Kysela log->idx = (log->idx + 1) % XRUN_LOG_CNT; 2324d96eb25SJaroslav Kysela } 2334d96eb25SJaroslav Kysela 2344d96eb25SJaroslav Kysela static void xrun_log_show(struct snd_pcm_substream *substream) 2354d96eb25SJaroslav Kysela { 2364d96eb25SJaroslav Kysela struct snd_pcm_hwptr_log *log = substream->runtime->hwptr_log; 2374d96eb25SJaroslav Kysela struct hwptr_log_entry *entry; 238c0070110STakashi Iwai char name[16]; 2394d96eb25SJaroslav Kysela unsigned int idx; 2404d96eb25SJaroslav Kysela int cnt; 2414d96eb25SJaroslav Kysela 2424d96eb25SJaroslav Kysela if (log == NULL) 2434d96eb25SJaroslav Kysela return; 2444d96eb25SJaroslav Kysela if (xrun_debug(substream, XRUN_DEBUG_LOGONCE) && log->hit) 2454d96eb25SJaroslav Kysela return; 246c0070110STakashi Iwai pcm_debug_name(substream, name, sizeof(name)); 2474d96eb25SJaroslav Kysela for (cnt = 0, idx = log->idx; cnt < XRUN_LOG_CNT; cnt++) { 2484d96eb25SJaroslav Kysela entry = &log->entries[idx]; 2494d96eb25SJaroslav Kysela if (entry->period_size == 0) 2504d96eb25SJaroslav Kysela break; 251ec08b144SBen Gardiner snd_printd("hwptr log: %s: %sj=%lu, pos=%ld/%ld/%ld, " 252f240406bSJaroslav Kysela "hwptr=%ld/%ld\n", 253ec08b144SBen Gardiner name, entry->in_interrupt ? "[Q] " : "", 254ec08b144SBen Gardiner entry->jiffies, 255ec08b144SBen Gardiner (unsigned long)entry->pos, 2564d96eb25SJaroslav Kysela (unsigned long)entry->period_size, 2574d96eb25SJaroslav Kysela (unsigned long)entry->buffer_size, 2584d96eb25SJaroslav Kysela (unsigned long)entry->old_hw_ptr, 259f240406bSJaroslav Kysela (unsigned long)entry->hw_ptr_base); 2604d96eb25SJaroslav Kysela idx++; 2614d96eb25SJaroslav Kysela idx %= XRUN_LOG_CNT; 2627c22f1aaSTakashi Iwai } 2634d96eb25SJaroslav Kysela log->hit = 1; 2641da177e4SLinus Torvalds } 2651da177e4SLinus Torvalds 2664d96eb25SJaroslav Kysela #else /* ! CONFIG_SND_PCM_XRUN_DEBUG */ 2674d96eb25SJaroslav Kysela 2684d96eb25SJaroslav Kysela #define hw_ptr_error(substream, fmt, args...) do { } while (0) 269217658f4SBen Gardiner #define xrun_log(substream, pos, in_interrupt) do { } while (0) 2704d96eb25SJaroslav Kysela #define xrun_log_show(substream) do { } while (0) 2714d96eb25SJaroslav Kysela 2724d96eb25SJaroslav Kysela #endif 2734d96eb25SJaroslav Kysela 2741250932eSJaroslav Kysela int snd_pcm_update_state(struct snd_pcm_substream *substream, 275877211f5STakashi Iwai struct snd_pcm_runtime *runtime) 2761da177e4SLinus Torvalds { 2771da177e4SLinus Torvalds snd_pcm_uframes_t avail; 2781da177e4SLinus Torvalds 2791da177e4SLinus Torvalds if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2801da177e4SLinus Torvalds avail = snd_pcm_playback_avail(runtime); 2811da177e4SLinus Torvalds else 2821da177e4SLinus Torvalds avail = snd_pcm_capture_avail(runtime); 2831da177e4SLinus Torvalds if (avail > runtime->avail_max) 2841da177e4SLinus Torvalds runtime->avail_max = avail; 2854cdc115fSTakashi Iwai if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 2864cdc115fSTakashi Iwai if (avail >= runtime->buffer_size) { 2871da177e4SLinus Torvalds snd_pcm_drain_done(substream); 2884cdc115fSTakashi Iwai return -EPIPE; 2894cdc115fSTakashi Iwai } 2904cdc115fSTakashi Iwai } else { 2914cdc115fSTakashi Iwai if (avail >= runtime->stop_threshold) { 2921da177e4SLinus Torvalds xrun(substream); 2931da177e4SLinus Torvalds return -EPIPE; 2941da177e4SLinus Torvalds } 2954cdc115fSTakashi Iwai } 2965daeba34SDavid Dillow if (runtime->twake) { 2975daeba34SDavid Dillow if (avail >= runtime->twake) 2985daeba34SDavid Dillow wake_up(&runtime->tsleep); 2995daeba34SDavid Dillow } else if (avail >= runtime->control->avail_min) 3005daeba34SDavid Dillow wake_up(&runtime->sleep); 3011da177e4SLinus Torvalds return 0; 3021da177e4SLinus Torvalds } 3031da177e4SLinus Torvalds 304f240406bSJaroslav Kysela static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, 305f240406bSJaroslav Kysela unsigned int in_interrupt) 3061da177e4SLinus Torvalds { 307877211f5STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 3081da177e4SLinus Torvalds snd_pcm_uframes_t pos; 309f240406bSJaroslav Kysela snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base; 310bbf6ad13SJaroslav Kysela snd_pcm_sframes_t hdelta, delta; 311bbf6ad13SJaroslav Kysela unsigned long jdelta; 3121da177e4SLinus Torvalds 313bbf6ad13SJaroslav Kysela old_hw_ptr = runtime->status->hw_ptr; 314f240406bSJaroslav Kysela pos = substream->ops->pointer(substream); 3151da177e4SLinus Torvalds if (pos == SNDRV_PCM_POS_XRUN) { 3161da177e4SLinus Torvalds xrun(substream); 3171da177e4SLinus Torvalds return -EPIPE; 3181da177e4SLinus Torvalds } 319f240406bSJaroslav Kysela if (pos >= runtime->buffer_size) { 320f240406bSJaroslav Kysela if (printk_ratelimit()) { 321cedb8118STakashi Iwai char name[16]; 322cedb8118STakashi Iwai pcm_debug_name(substream, name, sizeof(name)); 323f240406bSJaroslav Kysela xrun_log_show(substream); 324f240406bSJaroslav Kysela snd_printd(KERN_ERR "BUG: %s, pos = %ld, " 325f240406bSJaroslav Kysela "buffer size = %ld, period size = %ld\n", 326f240406bSJaroslav Kysela name, pos, runtime->buffer_size, 327f240406bSJaroslav Kysela runtime->period_size); 328cedb8118STakashi Iwai } 329f240406bSJaroslav Kysela pos = 0; 330f240406bSJaroslav Kysela } 331f240406bSJaroslav Kysela pos -= pos % runtime->min_align; 332f240406bSJaroslav Kysela if (xrun_debug(substream, XRUN_DEBUG_LOG)) 333ec08b144SBen Gardiner xrun_log(substream, pos, in_interrupt); 334ed3da3d9STakashi Iwai hw_base = runtime->hw_ptr_base; 335ed3da3d9STakashi Iwai new_hw_ptr = hw_base + pos; 336f240406bSJaroslav Kysela if (in_interrupt) { 337f240406bSJaroslav Kysela /* we know that one period was processed */ 338f240406bSJaroslav Kysela /* delta = "expected next hw_ptr" for in_interrupt != 0 */ 339e7636925SJaroslav Kysela delta = runtime->hw_ptr_interrupt + runtime->period_size; 340f240406bSJaroslav Kysela if (delta > new_hw_ptr) { 341bd76af0fSJaroslav Kysela /* check for double acknowledged interrupts */ 342bd76af0fSJaroslav Kysela hdelta = jiffies - runtime->hw_ptr_jiffies; 343bd76af0fSJaroslav Kysela if (hdelta > runtime->hw_ptr_buffer_jiffies/2) { 344f240406bSJaroslav Kysela hw_base += runtime->buffer_size; 345f240406bSJaroslav Kysela if (hw_base >= runtime->boundary) 346f240406bSJaroslav Kysela hw_base = 0; 347f240406bSJaroslav Kysela new_hw_ptr = hw_base + pos; 348f240406bSJaroslav Kysela goto __delta; 349ded652f7STakashi Iwai } 350f240406bSJaroslav Kysela } 351bd76af0fSJaroslav Kysela } 352f240406bSJaroslav Kysela /* new_hw_ptr might be lower than old_hw_ptr in case when */ 353f240406bSJaroslav Kysela /* pointer crosses the end of the ring buffer */ 354f240406bSJaroslav Kysela if (new_hw_ptr < old_hw_ptr) { 355ed3da3d9STakashi Iwai hw_base += runtime->buffer_size; 3568b22d943STakashi Iwai if (hw_base >= runtime->boundary) 357ed3da3d9STakashi Iwai hw_base = 0; 358ed3da3d9STakashi Iwai new_hw_ptr = hw_base + pos; 3591da177e4SLinus Torvalds } 360f240406bSJaroslav Kysela __delta: 361b406e610SClemens Ladisch delta = new_hw_ptr - old_hw_ptr; 362b406e610SClemens Ladisch if (delta < 0) 363b406e610SClemens Ladisch delta += runtime->boundary; 364f240406bSJaroslav Kysela if (xrun_debug(substream, in_interrupt ? 365f240406bSJaroslav Kysela XRUN_DEBUG_PERIODUPDATE : XRUN_DEBUG_HWPTRUPDATE)) { 366f240406bSJaroslav Kysela char name[16]; 367f240406bSJaroslav Kysela pcm_debug_name(substream, name, sizeof(name)); 368f240406bSJaroslav Kysela snd_printd("%s_update: %s: pos=%u/%u/%u, " 369f240406bSJaroslav Kysela "hwptr=%ld/%ld/%ld/%ld\n", 370f240406bSJaroslav Kysela in_interrupt ? "period" : "hwptr", 371f240406bSJaroslav Kysela name, 372f240406bSJaroslav Kysela (unsigned int)pos, 373f240406bSJaroslav Kysela (unsigned int)runtime->period_size, 374f240406bSJaroslav Kysela (unsigned int)runtime->buffer_size, 375f240406bSJaroslav Kysela (unsigned long)delta, 376f240406bSJaroslav Kysela (unsigned long)old_hw_ptr, 377f240406bSJaroslav Kysela (unsigned long)new_hw_ptr, 378f240406bSJaroslav Kysela (unsigned long)runtime->hw_ptr_base); 379f240406bSJaroslav Kysela } 380ab69a490SClemens Ladisch 38159ff878fSClemens Ladisch if (runtime->no_period_wakeup) { 38212ff414eSKelly Anderson snd_pcm_sframes_t xrun_threshold; 38359ff878fSClemens Ladisch /* 38459ff878fSClemens Ladisch * Without regular period interrupts, we have to check 38559ff878fSClemens Ladisch * the elapsed time to detect xruns. 38659ff878fSClemens Ladisch */ 38759ff878fSClemens Ladisch jdelta = jiffies - runtime->hw_ptr_jiffies; 38847228e48SClemens Ladisch if (jdelta < runtime->hw_ptr_buffer_jiffies / 2) 38947228e48SClemens Ladisch goto no_delta_check; 39059ff878fSClemens Ladisch hdelta = jdelta - delta * HZ / runtime->rate; 39112ff414eSKelly Anderson xrun_threshold = runtime->hw_ptr_buffer_jiffies / 2 + 1; 39212ff414eSKelly Anderson while (hdelta > xrun_threshold) { 39359ff878fSClemens Ladisch delta += runtime->buffer_size; 39459ff878fSClemens Ladisch hw_base += runtime->buffer_size; 39559ff878fSClemens Ladisch if (hw_base >= runtime->boundary) 39659ff878fSClemens Ladisch hw_base = 0; 39759ff878fSClemens Ladisch new_hw_ptr = hw_base + pos; 39859ff878fSClemens Ladisch hdelta -= runtime->hw_ptr_buffer_jiffies; 39959ff878fSClemens Ladisch } 400ab69a490SClemens Ladisch goto no_delta_check; 40159ff878fSClemens Ladisch } 402ab69a490SClemens Ladisch 403f240406bSJaroslav Kysela /* something must be really wrong */ 4047b3a177bSJaroslav Kysela if (delta >= runtime->buffer_size + runtime->period_size) { 405f240406bSJaroslav Kysela hw_ptr_error(substream, 406f240406bSJaroslav Kysela "Unexpected hw_pointer value %s" 407f240406bSJaroslav Kysela "(stream=%i, pos=%ld, new_hw_ptr=%ld, " 408f240406bSJaroslav Kysela "old_hw_ptr=%ld)\n", 409f240406bSJaroslav Kysela in_interrupt ? "[Q] " : "[P]", 410f240406bSJaroslav Kysela substream->stream, (long)pos, 411f240406bSJaroslav Kysela (long)new_hw_ptr, (long)old_hw_ptr); 412f240406bSJaroslav Kysela return 0; 4131da177e4SLinus Torvalds } 414c87d9732STakashi Iwai 415c87d9732STakashi Iwai /* Do jiffies check only in xrun_debug mode */ 416741b20cfSJaroslav Kysela if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK)) 417c87d9732STakashi Iwai goto no_jiffies_check; 418c87d9732STakashi Iwai 4193e5b5016STakashi Iwai /* Skip the jiffies check for hardwares with BATCH flag. 4203e5b5016STakashi Iwai * Such hardware usually just increases the position at each IRQ, 4213e5b5016STakashi Iwai * thus it can't give any strange position. 4223e5b5016STakashi Iwai */ 4233e5b5016STakashi Iwai if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) 4243e5b5016STakashi Iwai goto no_jiffies_check; 425f240406bSJaroslav Kysela hdelta = delta; 426a4444da3SJaroslav Kysela if (hdelta < runtime->delay) 427a4444da3SJaroslav Kysela goto no_jiffies_check; 428a4444da3SJaroslav Kysela hdelta -= runtime->delay; 429bbf6ad13SJaroslav Kysela jdelta = jiffies - runtime->hw_ptr_jiffies; 430bbf6ad13SJaroslav Kysela if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { 431bbf6ad13SJaroslav Kysela delta = jdelta / 432bbf6ad13SJaroslav Kysela (((runtime->period_size * HZ) / runtime->rate) 433bbf6ad13SJaroslav Kysela + HZ/100); 434f240406bSJaroslav Kysela /* move new_hw_ptr according jiffies not pos variable */ 435f240406bSJaroslav Kysela new_hw_ptr = old_hw_ptr; 436ed69c6a8SJaroslav Kysela hw_base = delta; 437f240406bSJaroslav Kysela /* use loop to avoid checks for delta overflows */ 438f240406bSJaroslav Kysela /* the delta value is small or zero in most cases */ 439f240406bSJaroslav Kysela while (delta > 0) { 440f240406bSJaroslav Kysela new_hw_ptr += runtime->period_size; 441f240406bSJaroslav Kysela if (new_hw_ptr >= runtime->boundary) 442f240406bSJaroslav Kysela new_hw_ptr -= runtime->boundary; 443f240406bSJaroslav Kysela delta--; 444f240406bSJaroslav Kysela } 445f240406bSJaroslav Kysela /* align hw_base to buffer_size */ 446bbf6ad13SJaroslav Kysela hw_ptr_error(substream, 447f240406bSJaroslav Kysela "hw_ptr skipping! %s" 448bbf6ad13SJaroslav Kysela "(pos=%ld, delta=%ld, period=%ld, " 449f240406bSJaroslav Kysela "jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld)\n", 450f240406bSJaroslav Kysela in_interrupt ? "[Q] " : "", 451bbf6ad13SJaroslav Kysela (long)pos, (long)hdelta, 452bbf6ad13SJaroslav Kysela (long)runtime->period_size, jdelta, 453ed69c6a8SJaroslav Kysela ((hdelta * HZ) / runtime->rate), hw_base, 454f240406bSJaroslav Kysela (unsigned long)old_hw_ptr, 455f240406bSJaroslav Kysela (unsigned long)new_hw_ptr); 456ed69c6a8SJaroslav Kysela /* reset values to proper state */ 457ed69c6a8SJaroslav Kysela delta = 0; 458ed69c6a8SJaroslav Kysela hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size); 459bbf6ad13SJaroslav Kysela } 4603e5b5016STakashi Iwai no_jiffies_check: 461bbf6ad13SJaroslav Kysela if (delta > runtime->period_size + runtime->period_size / 2) { 462ed3da3d9STakashi Iwai hw_ptr_error(substream, 463f240406bSJaroslav Kysela "Lost interrupts? %s" 464f240406bSJaroslav Kysela "(stream=%i, delta=%ld, new_hw_ptr=%ld, " 465f240406bSJaroslav Kysela "old_hw_ptr=%ld)\n", 466f240406bSJaroslav Kysela in_interrupt ? "[Q] " : "", 467ed3da3d9STakashi Iwai substream->stream, (long)delta, 468f240406bSJaroslav Kysela (long)new_hw_ptr, 469f240406bSJaroslav Kysela (long)old_hw_ptr); 4701da177e4SLinus Torvalds } 471f240406bSJaroslav Kysela 472ab69a490SClemens Ladisch no_delta_check: 473f240406bSJaroslav Kysela if (runtime->status->hw_ptr == new_hw_ptr) 474f240406bSJaroslav Kysela return 0; 475ab1863fcSTakashi Iwai 4761da177e4SLinus Torvalds if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 4771da177e4SLinus Torvalds runtime->silence_size > 0) 4781da177e4SLinus Torvalds snd_pcm_playback_silence(substream, new_hw_ptr); 4791da177e4SLinus Torvalds 480e7636925SJaroslav Kysela if (in_interrupt) { 481ead4046bSClemens Ladisch delta = new_hw_ptr - runtime->hw_ptr_interrupt; 482ead4046bSClemens Ladisch if (delta < 0) 483ead4046bSClemens Ladisch delta += runtime->boundary; 484ead4046bSClemens Ladisch delta -= (snd_pcm_uframes_t)delta % runtime->period_size; 485ead4046bSClemens Ladisch runtime->hw_ptr_interrupt += delta; 486ead4046bSClemens Ladisch if (runtime->hw_ptr_interrupt >= runtime->boundary) 487ead4046bSClemens Ladisch runtime->hw_ptr_interrupt -= runtime->boundary; 488e7636925SJaroslav Kysela } 489ed3da3d9STakashi Iwai runtime->hw_ptr_base = hw_base; 4901da177e4SLinus Torvalds runtime->status->hw_ptr = new_hw_ptr; 491bbf6ad13SJaroslav Kysela runtime->hw_ptr_jiffies = jiffies; 49213f040f9SJaroslav Kysela if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) 49313f040f9SJaroslav Kysela snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); 4941da177e4SLinus Torvalds 4951250932eSJaroslav Kysela return snd_pcm_update_state(substream, runtime); 4961da177e4SLinus Torvalds } 4971da177e4SLinus Torvalds 4981da177e4SLinus Torvalds /* CAUTION: call it with irq disabled */ 499877211f5STakashi Iwai int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) 5001da177e4SLinus Torvalds { 501f240406bSJaroslav Kysela return snd_pcm_update_hw_ptr0(substream, 0); 5021da177e4SLinus Torvalds } 5031da177e4SLinus Torvalds 5041da177e4SLinus Torvalds /** 5051da177e4SLinus Torvalds * snd_pcm_set_ops - set the PCM operators 5061da177e4SLinus Torvalds * @pcm: the pcm instance 5071da177e4SLinus Torvalds * @direction: stream direction, SNDRV_PCM_STREAM_XXX 5081da177e4SLinus Torvalds * @ops: the operator table 5091da177e4SLinus Torvalds * 5101da177e4SLinus Torvalds * Sets the given PCM operators to the pcm instance. 5111da177e4SLinus Torvalds */ 512877211f5STakashi Iwai void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, struct snd_pcm_ops *ops) 5131da177e4SLinus Torvalds { 514877211f5STakashi Iwai struct snd_pcm_str *stream = &pcm->streams[direction]; 515877211f5STakashi Iwai struct snd_pcm_substream *substream; 5161da177e4SLinus Torvalds 5171da177e4SLinus Torvalds for (substream = stream->substream; substream != NULL; substream = substream->next) 5181da177e4SLinus Torvalds substream->ops = ops; 5191da177e4SLinus Torvalds } 5201da177e4SLinus Torvalds 521e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_set_ops); 5221da177e4SLinus Torvalds 5231da177e4SLinus Torvalds /** 5241da177e4SLinus Torvalds * snd_pcm_sync - set the PCM sync id 5251da177e4SLinus Torvalds * @substream: the pcm substream 5261da177e4SLinus Torvalds * 5271da177e4SLinus Torvalds * Sets the PCM sync identifier for the card. 5281da177e4SLinus Torvalds */ 529877211f5STakashi Iwai void snd_pcm_set_sync(struct snd_pcm_substream *substream) 5301da177e4SLinus Torvalds { 531877211f5STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 5321da177e4SLinus Torvalds 5331da177e4SLinus Torvalds runtime->sync.id32[0] = substream->pcm->card->number; 5341da177e4SLinus Torvalds runtime->sync.id32[1] = -1; 5351da177e4SLinus Torvalds runtime->sync.id32[2] = -1; 5361da177e4SLinus Torvalds runtime->sync.id32[3] = -1; 5371da177e4SLinus Torvalds } 5381da177e4SLinus Torvalds 539e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_set_sync); 540e88e8ae6STakashi Iwai 5411da177e4SLinus Torvalds /* 5421da177e4SLinus Torvalds * Standard ioctl routine 5431da177e4SLinus Torvalds */ 5441da177e4SLinus Torvalds 5451da177e4SLinus Torvalds static inline unsigned int div32(unsigned int a, unsigned int b, 5461da177e4SLinus Torvalds unsigned int *r) 5471da177e4SLinus Torvalds { 5481da177e4SLinus Torvalds if (b == 0) { 5491da177e4SLinus Torvalds *r = 0; 5501da177e4SLinus Torvalds return UINT_MAX; 5511da177e4SLinus Torvalds } 5521da177e4SLinus Torvalds *r = a % b; 5531da177e4SLinus Torvalds return a / b; 5541da177e4SLinus Torvalds } 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds static inline unsigned int div_down(unsigned int a, unsigned int b) 5571da177e4SLinus Torvalds { 5581da177e4SLinus Torvalds if (b == 0) 5591da177e4SLinus Torvalds return UINT_MAX; 5601da177e4SLinus Torvalds return a / b; 5611da177e4SLinus Torvalds } 5621da177e4SLinus Torvalds 5631da177e4SLinus Torvalds static inline unsigned int div_up(unsigned int a, unsigned int b) 5641da177e4SLinus Torvalds { 5651da177e4SLinus Torvalds unsigned int r; 5661da177e4SLinus Torvalds unsigned int q; 5671da177e4SLinus Torvalds if (b == 0) 5681da177e4SLinus Torvalds return UINT_MAX; 5691da177e4SLinus Torvalds q = div32(a, b, &r); 5701da177e4SLinus Torvalds if (r) 5711da177e4SLinus Torvalds ++q; 5721da177e4SLinus Torvalds return q; 5731da177e4SLinus Torvalds } 5741da177e4SLinus Torvalds 5751da177e4SLinus Torvalds static inline unsigned int mul(unsigned int a, unsigned int b) 5761da177e4SLinus Torvalds { 5771da177e4SLinus Torvalds if (a == 0) 5781da177e4SLinus Torvalds return 0; 5791da177e4SLinus Torvalds if (div_down(UINT_MAX, a) < b) 5801da177e4SLinus Torvalds return UINT_MAX; 5811da177e4SLinus Torvalds return a * b; 5821da177e4SLinus Torvalds } 5831da177e4SLinus Torvalds 5841da177e4SLinus Torvalds static inline unsigned int muldiv32(unsigned int a, unsigned int b, 5851da177e4SLinus Torvalds unsigned int c, unsigned int *r) 5861da177e4SLinus Torvalds { 5871da177e4SLinus Torvalds u_int64_t n = (u_int64_t) a * b; 5881da177e4SLinus Torvalds if (c == 0) { 5897eaa943cSTakashi Iwai snd_BUG_ON(!n); 5901da177e4SLinus Torvalds *r = 0; 5911da177e4SLinus Torvalds return UINT_MAX; 5921da177e4SLinus Torvalds } 5933f7440a6STakashi Iwai n = div_u64_rem(n, c, r); 5941da177e4SLinus Torvalds if (n >= UINT_MAX) { 5951da177e4SLinus Torvalds *r = 0; 5961da177e4SLinus Torvalds return UINT_MAX; 5971da177e4SLinus Torvalds } 5981da177e4SLinus Torvalds return n; 5991da177e4SLinus Torvalds } 6001da177e4SLinus Torvalds 6011da177e4SLinus Torvalds /** 6021da177e4SLinus Torvalds * snd_interval_refine - refine the interval value of configurator 6031da177e4SLinus Torvalds * @i: the interval value to refine 6041da177e4SLinus Torvalds * @v: the interval value to refer to 6051da177e4SLinus Torvalds * 6061da177e4SLinus Torvalds * Refines the interval value with the reference value. 6071da177e4SLinus Torvalds * The interval is changed to the range satisfying both intervals. 6081da177e4SLinus Torvalds * The interval status (min, max, integer, etc.) are evaluated. 6091da177e4SLinus Torvalds * 6101da177e4SLinus Torvalds * Returns non-zero if the value is changed, zero if not changed. 6111da177e4SLinus Torvalds */ 612877211f5STakashi Iwai int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) 6131da177e4SLinus Torvalds { 6141da177e4SLinus Torvalds int changed = 0; 6157eaa943cSTakashi Iwai if (snd_BUG_ON(snd_interval_empty(i))) 6167eaa943cSTakashi Iwai return -EINVAL; 6171da177e4SLinus Torvalds if (i->min < v->min) { 6181da177e4SLinus Torvalds i->min = v->min; 6191da177e4SLinus Torvalds i->openmin = v->openmin; 6201da177e4SLinus Torvalds changed = 1; 6211da177e4SLinus Torvalds } else if (i->min == v->min && !i->openmin && v->openmin) { 6221da177e4SLinus Torvalds i->openmin = 1; 6231da177e4SLinus Torvalds changed = 1; 6241da177e4SLinus Torvalds } 6251da177e4SLinus Torvalds if (i->max > v->max) { 6261da177e4SLinus Torvalds i->max = v->max; 6271da177e4SLinus Torvalds i->openmax = v->openmax; 6281da177e4SLinus Torvalds changed = 1; 6291da177e4SLinus Torvalds } else if (i->max == v->max && !i->openmax && v->openmax) { 6301da177e4SLinus Torvalds i->openmax = 1; 6311da177e4SLinus Torvalds changed = 1; 6321da177e4SLinus Torvalds } 6331da177e4SLinus Torvalds if (!i->integer && v->integer) { 6341da177e4SLinus Torvalds i->integer = 1; 6351da177e4SLinus Torvalds changed = 1; 6361da177e4SLinus Torvalds } 6371da177e4SLinus Torvalds if (i->integer) { 6381da177e4SLinus Torvalds if (i->openmin) { 6391da177e4SLinus Torvalds i->min++; 6401da177e4SLinus Torvalds i->openmin = 0; 6411da177e4SLinus Torvalds } 6421da177e4SLinus Torvalds if (i->openmax) { 6431da177e4SLinus Torvalds i->max--; 6441da177e4SLinus Torvalds i->openmax = 0; 6451da177e4SLinus Torvalds } 6461da177e4SLinus Torvalds } else if (!i->openmin && !i->openmax && i->min == i->max) 6471da177e4SLinus Torvalds i->integer = 1; 6481da177e4SLinus Torvalds if (snd_interval_checkempty(i)) { 6491da177e4SLinus Torvalds snd_interval_none(i); 6501da177e4SLinus Torvalds return -EINVAL; 6511da177e4SLinus Torvalds } 6521da177e4SLinus Torvalds return changed; 6531da177e4SLinus Torvalds } 6541da177e4SLinus Torvalds 655e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_interval_refine); 656e88e8ae6STakashi Iwai 657877211f5STakashi Iwai static int snd_interval_refine_first(struct snd_interval *i) 6581da177e4SLinus Torvalds { 6597eaa943cSTakashi Iwai if (snd_BUG_ON(snd_interval_empty(i))) 6607eaa943cSTakashi Iwai return -EINVAL; 6611da177e4SLinus Torvalds if (snd_interval_single(i)) 6621da177e4SLinus Torvalds return 0; 6631da177e4SLinus Torvalds i->max = i->min; 6641da177e4SLinus Torvalds i->openmax = i->openmin; 6651da177e4SLinus Torvalds if (i->openmax) 6661da177e4SLinus Torvalds i->max++; 6671da177e4SLinus Torvalds return 1; 6681da177e4SLinus Torvalds } 6691da177e4SLinus Torvalds 670877211f5STakashi Iwai static int snd_interval_refine_last(struct snd_interval *i) 6711da177e4SLinus Torvalds { 6727eaa943cSTakashi Iwai if (snd_BUG_ON(snd_interval_empty(i))) 6737eaa943cSTakashi Iwai return -EINVAL; 6741da177e4SLinus Torvalds if (snd_interval_single(i)) 6751da177e4SLinus Torvalds return 0; 6761da177e4SLinus Torvalds i->min = i->max; 6771da177e4SLinus Torvalds i->openmin = i->openmax; 6781da177e4SLinus Torvalds if (i->openmin) 6791da177e4SLinus Torvalds i->min--; 6801da177e4SLinus Torvalds return 1; 6811da177e4SLinus Torvalds } 6821da177e4SLinus Torvalds 683877211f5STakashi Iwai void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) 6841da177e4SLinus Torvalds { 6851da177e4SLinus Torvalds if (a->empty || b->empty) { 6861da177e4SLinus Torvalds snd_interval_none(c); 6871da177e4SLinus Torvalds return; 6881da177e4SLinus Torvalds } 6891da177e4SLinus Torvalds c->empty = 0; 6901da177e4SLinus Torvalds c->min = mul(a->min, b->min); 6911da177e4SLinus Torvalds c->openmin = (a->openmin || b->openmin); 6921da177e4SLinus Torvalds c->max = mul(a->max, b->max); 6931da177e4SLinus Torvalds c->openmax = (a->openmax || b->openmax); 6941da177e4SLinus Torvalds c->integer = (a->integer && b->integer); 6951da177e4SLinus Torvalds } 6961da177e4SLinus Torvalds 6971da177e4SLinus Torvalds /** 6981da177e4SLinus Torvalds * snd_interval_div - refine the interval value with division 699df8db936STakashi Iwai * @a: dividend 700df8db936STakashi Iwai * @b: divisor 701df8db936STakashi Iwai * @c: quotient 7021da177e4SLinus Torvalds * 7031da177e4SLinus Torvalds * c = a / b 7041da177e4SLinus Torvalds * 7051da177e4SLinus Torvalds * Returns non-zero if the value is changed, zero if not changed. 7061da177e4SLinus Torvalds */ 707877211f5STakashi Iwai void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) 7081da177e4SLinus Torvalds { 7091da177e4SLinus Torvalds unsigned int r; 7101da177e4SLinus Torvalds if (a->empty || b->empty) { 7111da177e4SLinus Torvalds snd_interval_none(c); 7121da177e4SLinus Torvalds return; 7131da177e4SLinus Torvalds } 7141da177e4SLinus Torvalds c->empty = 0; 7151da177e4SLinus Torvalds c->min = div32(a->min, b->max, &r); 7161da177e4SLinus Torvalds c->openmin = (r || a->openmin || b->openmax); 7171da177e4SLinus Torvalds if (b->min > 0) { 7181da177e4SLinus Torvalds c->max = div32(a->max, b->min, &r); 7191da177e4SLinus Torvalds if (r) { 7201da177e4SLinus Torvalds c->max++; 7211da177e4SLinus Torvalds c->openmax = 1; 7221da177e4SLinus Torvalds } else 7231da177e4SLinus Torvalds c->openmax = (a->openmax || b->openmin); 7241da177e4SLinus Torvalds } else { 7251da177e4SLinus Torvalds c->max = UINT_MAX; 7261da177e4SLinus Torvalds c->openmax = 0; 7271da177e4SLinus Torvalds } 7281da177e4SLinus Torvalds c->integer = 0; 7291da177e4SLinus Torvalds } 7301da177e4SLinus Torvalds 7311da177e4SLinus Torvalds /** 7321da177e4SLinus Torvalds * snd_interval_muldivk - refine the interval value 733df8db936STakashi Iwai * @a: dividend 1 734df8db936STakashi Iwai * @b: dividend 2 735df8db936STakashi Iwai * @k: divisor (as integer) 736df8db936STakashi Iwai * @c: result 7371da177e4SLinus Torvalds * 7381da177e4SLinus Torvalds * c = a * b / k 7391da177e4SLinus Torvalds * 7401da177e4SLinus Torvalds * Returns non-zero if the value is changed, zero if not changed. 7411da177e4SLinus Torvalds */ 742877211f5STakashi Iwai void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, 743877211f5STakashi Iwai unsigned int k, struct snd_interval *c) 7441da177e4SLinus Torvalds { 7451da177e4SLinus Torvalds unsigned int r; 7461da177e4SLinus Torvalds if (a->empty || b->empty) { 7471da177e4SLinus Torvalds snd_interval_none(c); 7481da177e4SLinus Torvalds return; 7491da177e4SLinus Torvalds } 7501da177e4SLinus Torvalds c->empty = 0; 7511da177e4SLinus Torvalds c->min = muldiv32(a->min, b->min, k, &r); 7521da177e4SLinus Torvalds c->openmin = (r || a->openmin || b->openmin); 7531da177e4SLinus Torvalds c->max = muldiv32(a->max, b->max, k, &r); 7541da177e4SLinus Torvalds if (r) { 7551da177e4SLinus Torvalds c->max++; 7561da177e4SLinus Torvalds c->openmax = 1; 7571da177e4SLinus Torvalds } else 7581da177e4SLinus Torvalds c->openmax = (a->openmax || b->openmax); 7591da177e4SLinus Torvalds c->integer = 0; 7601da177e4SLinus Torvalds } 7611da177e4SLinus Torvalds 7621da177e4SLinus Torvalds /** 7631da177e4SLinus Torvalds * snd_interval_mulkdiv - refine the interval value 764df8db936STakashi Iwai * @a: dividend 1 765df8db936STakashi Iwai * @k: dividend 2 (as integer) 766df8db936STakashi Iwai * @b: divisor 767df8db936STakashi Iwai * @c: result 7681da177e4SLinus Torvalds * 7691da177e4SLinus Torvalds * c = a * k / b 7701da177e4SLinus Torvalds * 7711da177e4SLinus Torvalds * Returns non-zero if the value is changed, zero if not changed. 7721da177e4SLinus Torvalds */ 773877211f5STakashi Iwai void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, 774877211f5STakashi Iwai const struct snd_interval *b, struct snd_interval *c) 7751da177e4SLinus Torvalds { 7761da177e4SLinus Torvalds unsigned int r; 7771da177e4SLinus Torvalds if (a->empty || b->empty) { 7781da177e4SLinus Torvalds snd_interval_none(c); 7791da177e4SLinus Torvalds return; 7801da177e4SLinus Torvalds } 7811da177e4SLinus Torvalds c->empty = 0; 7821da177e4SLinus Torvalds c->min = muldiv32(a->min, k, b->max, &r); 7831da177e4SLinus Torvalds c->openmin = (r || a->openmin || b->openmax); 7841da177e4SLinus Torvalds if (b->min > 0) { 7851da177e4SLinus Torvalds c->max = muldiv32(a->max, k, b->min, &r); 7861da177e4SLinus Torvalds if (r) { 7871da177e4SLinus Torvalds c->max++; 7881da177e4SLinus Torvalds c->openmax = 1; 7891da177e4SLinus Torvalds } else 7901da177e4SLinus Torvalds c->openmax = (a->openmax || b->openmin); 7911da177e4SLinus Torvalds } else { 7921da177e4SLinus Torvalds c->max = UINT_MAX; 7931da177e4SLinus Torvalds c->openmax = 0; 7941da177e4SLinus Torvalds } 7951da177e4SLinus Torvalds c->integer = 0; 7961da177e4SLinus Torvalds } 7971da177e4SLinus Torvalds 7981da177e4SLinus Torvalds /* ---- */ 7991da177e4SLinus Torvalds 8001da177e4SLinus Torvalds 8011da177e4SLinus Torvalds /** 8021da177e4SLinus Torvalds * snd_interval_ratnum - refine the interval value 803df8db936STakashi Iwai * @i: interval to refine 804df8db936STakashi Iwai * @rats_count: number of ratnum_t 805df8db936STakashi Iwai * @rats: ratnum_t array 806df8db936STakashi Iwai * @nump: pointer to store the resultant numerator 807df8db936STakashi Iwai * @denp: pointer to store the resultant denominator 8081da177e4SLinus Torvalds * 8091da177e4SLinus Torvalds * Returns non-zero if the value is changed, zero if not changed. 8101da177e4SLinus Torvalds */ 811877211f5STakashi Iwai int snd_interval_ratnum(struct snd_interval *i, 812877211f5STakashi Iwai unsigned int rats_count, struct snd_ratnum *rats, 8131da177e4SLinus Torvalds unsigned int *nump, unsigned int *denp) 8141da177e4SLinus Torvalds { 8158374e24cSKrzysztof Helt unsigned int best_num, best_den; 8168374e24cSKrzysztof Helt int best_diff; 8171da177e4SLinus Torvalds unsigned int k; 818877211f5STakashi Iwai struct snd_interval t; 8191da177e4SLinus Torvalds int err; 8208374e24cSKrzysztof Helt unsigned int result_num, result_den; 8218374e24cSKrzysztof Helt int result_diff; 8221da177e4SLinus Torvalds 8231da177e4SLinus Torvalds best_num = best_den = best_diff = 0; 8241da177e4SLinus Torvalds for (k = 0; k < rats_count; ++k) { 8251da177e4SLinus Torvalds unsigned int num = rats[k].num; 8261da177e4SLinus Torvalds unsigned int den; 8271da177e4SLinus Torvalds unsigned int q = i->min; 8281da177e4SLinus Torvalds int diff; 8291da177e4SLinus Torvalds if (q == 0) 8301da177e4SLinus Torvalds q = 1; 83140962d7cSKrzysztof Helt den = div_up(num, q); 8321da177e4SLinus Torvalds if (den < rats[k].den_min) 8331da177e4SLinus Torvalds continue; 8341da177e4SLinus Torvalds if (den > rats[k].den_max) 8351da177e4SLinus Torvalds den = rats[k].den_max; 8361da177e4SLinus Torvalds else { 8371da177e4SLinus Torvalds unsigned int r; 8381da177e4SLinus Torvalds r = (den - rats[k].den_min) % rats[k].den_step; 8391da177e4SLinus Torvalds if (r != 0) 8401da177e4SLinus Torvalds den -= r; 8411da177e4SLinus Torvalds } 8421da177e4SLinus Torvalds diff = num - q * den; 8438374e24cSKrzysztof Helt if (diff < 0) 8448374e24cSKrzysztof Helt diff = -diff; 8451da177e4SLinus Torvalds if (best_num == 0 || 8461da177e4SLinus Torvalds diff * best_den < best_diff * den) { 8471da177e4SLinus Torvalds best_diff = diff; 8481da177e4SLinus Torvalds best_den = den; 8491da177e4SLinus Torvalds best_num = num; 8501da177e4SLinus Torvalds } 8511da177e4SLinus Torvalds } 8521da177e4SLinus Torvalds if (best_den == 0) { 8531da177e4SLinus Torvalds i->empty = 1; 8541da177e4SLinus Torvalds return -EINVAL; 8551da177e4SLinus Torvalds } 8561da177e4SLinus Torvalds t.min = div_down(best_num, best_den); 8571da177e4SLinus Torvalds t.openmin = !!(best_num % best_den); 8581da177e4SLinus Torvalds 8598374e24cSKrzysztof Helt result_num = best_num; 8608374e24cSKrzysztof Helt result_diff = best_diff; 8618374e24cSKrzysztof Helt result_den = best_den; 8621da177e4SLinus Torvalds best_num = best_den = best_diff = 0; 8631da177e4SLinus Torvalds for (k = 0; k < rats_count; ++k) { 8641da177e4SLinus Torvalds unsigned int num = rats[k].num; 8651da177e4SLinus Torvalds unsigned int den; 8661da177e4SLinus Torvalds unsigned int q = i->max; 8671da177e4SLinus Torvalds int diff; 8681da177e4SLinus Torvalds if (q == 0) { 8691da177e4SLinus Torvalds i->empty = 1; 8701da177e4SLinus Torvalds return -EINVAL; 8711da177e4SLinus Torvalds } 87240962d7cSKrzysztof Helt den = div_down(num, q); 8731da177e4SLinus Torvalds if (den > rats[k].den_max) 8741da177e4SLinus Torvalds continue; 8751da177e4SLinus Torvalds if (den < rats[k].den_min) 8761da177e4SLinus Torvalds den = rats[k].den_min; 8771da177e4SLinus Torvalds else { 8781da177e4SLinus Torvalds unsigned int r; 8791da177e4SLinus Torvalds r = (den - rats[k].den_min) % rats[k].den_step; 8801da177e4SLinus Torvalds if (r != 0) 8811da177e4SLinus Torvalds den += rats[k].den_step - r; 8821da177e4SLinus Torvalds } 8831da177e4SLinus Torvalds diff = q * den - num; 8848374e24cSKrzysztof Helt if (diff < 0) 8858374e24cSKrzysztof Helt diff = -diff; 8861da177e4SLinus Torvalds if (best_num == 0 || 8871da177e4SLinus Torvalds diff * best_den < best_diff * den) { 8881da177e4SLinus Torvalds best_diff = diff; 8891da177e4SLinus Torvalds best_den = den; 8901da177e4SLinus Torvalds best_num = num; 8911da177e4SLinus Torvalds } 8921da177e4SLinus Torvalds } 8931da177e4SLinus Torvalds if (best_den == 0) { 8941da177e4SLinus Torvalds i->empty = 1; 8951da177e4SLinus Torvalds return -EINVAL; 8961da177e4SLinus Torvalds } 8971da177e4SLinus Torvalds t.max = div_up(best_num, best_den); 8981da177e4SLinus Torvalds t.openmax = !!(best_num % best_den); 8991da177e4SLinus Torvalds t.integer = 0; 9001da177e4SLinus Torvalds err = snd_interval_refine(i, &t); 9011da177e4SLinus Torvalds if (err < 0) 9021da177e4SLinus Torvalds return err; 9031da177e4SLinus Torvalds 9041da177e4SLinus Torvalds if (snd_interval_single(i)) { 9058374e24cSKrzysztof Helt if (best_diff * result_den < result_diff * best_den) { 9068374e24cSKrzysztof Helt result_num = best_num; 9078374e24cSKrzysztof Helt result_den = best_den; 9088374e24cSKrzysztof Helt } 9091da177e4SLinus Torvalds if (nump) 9108374e24cSKrzysztof Helt *nump = result_num; 9111da177e4SLinus Torvalds if (denp) 9128374e24cSKrzysztof Helt *denp = result_den; 9131da177e4SLinus Torvalds } 9141da177e4SLinus Torvalds return err; 9151da177e4SLinus Torvalds } 9161da177e4SLinus Torvalds 917e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_interval_ratnum); 918e88e8ae6STakashi Iwai 9191da177e4SLinus Torvalds /** 9201da177e4SLinus Torvalds * snd_interval_ratden - refine the interval value 921df8db936STakashi Iwai * @i: interval to refine 922877211f5STakashi Iwai * @rats_count: number of struct ratden 923877211f5STakashi Iwai * @rats: struct ratden array 924df8db936STakashi Iwai * @nump: pointer to store the resultant numerator 925df8db936STakashi Iwai * @denp: pointer to store the resultant denominator 9261da177e4SLinus Torvalds * 9271da177e4SLinus Torvalds * Returns non-zero if the value is changed, zero if not changed. 9281da177e4SLinus Torvalds */ 929877211f5STakashi Iwai static int snd_interval_ratden(struct snd_interval *i, 930877211f5STakashi Iwai unsigned int rats_count, struct snd_ratden *rats, 9311da177e4SLinus Torvalds unsigned int *nump, unsigned int *denp) 9321da177e4SLinus Torvalds { 9331da177e4SLinus Torvalds unsigned int best_num, best_diff, best_den; 9341da177e4SLinus Torvalds unsigned int k; 935877211f5STakashi Iwai struct snd_interval t; 9361da177e4SLinus Torvalds int err; 9371da177e4SLinus Torvalds 9381da177e4SLinus Torvalds best_num = best_den = best_diff = 0; 9391da177e4SLinus Torvalds for (k = 0; k < rats_count; ++k) { 9401da177e4SLinus Torvalds unsigned int num; 9411da177e4SLinus Torvalds unsigned int den = rats[k].den; 9421da177e4SLinus Torvalds unsigned int q = i->min; 9431da177e4SLinus Torvalds int diff; 9441da177e4SLinus Torvalds num = mul(q, den); 9451da177e4SLinus Torvalds if (num > rats[k].num_max) 9461da177e4SLinus Torvalds continue; 9471da177e4SLinus Torvalds if (num < rats[k].num_min) 9481da177e4SLinus Torvalds num = rats[k].num_max; 9491da177e4SLinus Torvalds else { 9501da177e4SLinus Torvalds unsigned int r; 9511da177e4SLinus Torvalds r = (num - rats[k].num_min) % rats[k].num_step; 9521da177e4SLinus Torvalds if (r != 0) 9531da177e4SLinus Torvalds num += rats[k].num_step - r; 9541da177e4SLinus Torvalds } 9551da177e4SLinus Torvalds diff = num - q * den; 9561da177e4SLinus Torvalds if (best_num == 0 || 9571da177e4SLinus Torvalds diff * best_den < best_diff * den) { 9581da177e4SLinus Torvalds best_diff = diff; 9591da177e4SLinus Torvalds best_den = den; 9601da177e4SLinus Torvalds best_num = num; 9611da177e4SLinus Torvalds } 9621da177e4SLinus Torvalds } 9631da177e4SLinus Torvalds if (best_den == 0) { 9641da177e4SLinus Torvalds i->empty = 1; 9651da177e4SLinus Torvalds return -EINVAL; 9661da177e4SLinus Torvalds } 9671da177e4SLinus Torvalds t.min = div_down(best_num, best_den); 9681da177e4SLinus Torvalds t.openmin = !!(best_num % best_den); 9691da177e4SLinus Torvalds 9701da177e4SLinus Torvalds best_num = best_den = best_diff = 0; 9711da177e4SLinus Torvalds for (k = 0; k < rats_count; ++k) { 9721da177e4SLinus Torvalds unsigned int num; 9731da177e4SLinus Torvalds unsigned int den = rats[k].den; 9741da177e4SLinus Torvalds unsigned int q = i->max; 9751da177e4SLinus Torvalds int diff; 9761da177e4SLinus Torvalds num = mul(q, den); 9771da177e4SLinus Torvalds if (num < rats[k].num_min) 9781da177e4SLinus Torvalds continue; 9791da177e4SLinus Torvalds if (num > rats[k].num_max) 9801da177e4SLinus Torvalds num = rats[k].num_max; 9811da177e4SLinus Torvalds else { 9821da177e4SLinus Torvalds unsigned int r; 9831da177e4SLinus Torvalds r = (num - rats[k].num_min) % rats[k].num_step; 9841da177e4SLinus Torvalds if (r != 0) 9851da177e4SLinus Torvalds num -= r; 9861da177e4SLinus Torvalds } 9871da177e4SLinus Torvalds diff = q * den - num; 9881da177e4SLinus Torvalds if (best_num == 0 || 9891da177e4SLinus Torvalds diff * best_den < best_diff * den) { 9901da177e4SLinus Torvalds best_diff = diff; 9911da177e4SLinus Torvalds best_den = den; 9921da177e4SLinus Torvalds best_num = num; 9931da177e4SLinus Torvalds } 9941da177e4SLinus Torvalds } 9951da177e4SLinus Torvalds if (best_den == 0) { 9961da177e4SLinus Torvalds i->empty = 1; 9971da177e4SLinus Torvalds return -EINVAL; 9981da177e4SLinus Torvalds } 9991da177e4SLinus Torvalds t.max = div_up(best_num, best_den); 10001da177e4SLinus Torvalds t.openmax = !!(best_num % best_den); 10011da177e4SLinus Torvalds t.integer = 0; 10021da177e4SLinus Torvalds err = snd_interval_refine(i, &t); 10031da177e4SLinus Torvalds if (err < 0) 10041da177e4SLinus Torvalds return err; 10051da177e4SLinus Torvalds 10061da177e4SLinus Torvalds if (snd_interval_single(i)) { 10071da177e4SLinus Torvalds if (nump) 10081da177e4SLinus Torvalds *nump = best_num; 10091da177e4SLinus Torvalds if (denp) 10101da177e4SLinus Torvalds *denp = best_den; 10111da177e4SLinus Torvalds } 10121da177e4SLinus Torvalds return err; 10131da177e4SLinus Torvalds } 10141da177e4SLinus Torvalds 10151da177e4SLinus Torvalds /** 10161da177e4SLinus Torvalds * snd_interval_list - refine the interval value from the list 10171da177e4SLinus Torvalds * @i: the interval value to refine 10181da177e4SLinus Torvalds * @count: the number of elements in the list 10191da177e4SLinus Torvalds * @list: the value list 10201da177e4SLinus Torvalds * @mask: the bit-mask to evaluate 10211da177e4SLinus Torvalds * 10221da177e4SLinus Torvalds * Refines the interval value from the list. 10231da177e4SLinus Torvalds * When mask is non-zero, only the elements corresponding to bit 1 are 10241da177e4SLinus Torvalds * evaluated. 10251da177e4SLinus Torvalds * 10261da177e4SLinus Torvalds * Returns non-zero if the value is changed, zero if not changed. 10271da177e4SLinus Torvalds */ 1028877211f5STakashi Iwai int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask) 10291da177e4SLinus Torvalds { 10301da177e4SLinus Torvalds unsigned int k; 1031b1ddaf68SClemens Ladisch struct snd_interval list_range; 10320981a260STakashi Iwai 10330981a260STakashi Iwai if (!count) { 10340981a260STakashi Iwai i->empty = 1; 10350981a260STakashi Iwai return -EINVAL; 10360981a260STakashi Iwai } 1037b1ddaf68SClemens Ladisch snd_interval_any(&list_range); 1038b1ddaf68SClemens Ladisch list_range.min = UINT_MAX; 1039b1ddaf68SClemens Ladisch list_range.max = 0; 10401da177e4SLinus Torvalds for (k = 0; k < count; k++) { 10411da177e4SLinus Torvalds if (mask && !(mask & (1 << k))) 10421da177e4SLinus Torvalds continue; 1043b1ddaf68SClemens Ladisch if (!snd_interval_test(i, list[k])) 10441da177e4SLinus Torvalds continue; 1045b1ddaf68SClemens Ladisch list_range.min = min(list_range.min, list[k]); 1046b1ddaf68SClemens Ladisch list_range.max = max(list_range.max, list[k]); 10471da177e4SLinus Torvalds } 1048b1ddaf68SClemens Ladisch return snd_interval_refine(i, &list_range); 10491da177e4SLinus Torvalds } 10501da177e4SLinus Torvalds 1051e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_interval_list); 1052e88e8ae6STakashi Iwai 1053877211f5STakashi Iwai static int snd_interval_step(struct snd_interval *i, unsigned int min, unsigned int step) 10541da177e4SLinus Torvalds { 10551da177e4SLinus Torvalds unsigned int n; 10561da177e4SLinus Torvalds int changed = 0; 10571da177e4SLinus Torvalds n = (i->min - min) % step; 10581da177e4SLinus Torvalds if (n != 0 || i->openmin) { 10591da177e4SLinus Torvalds i->min += step - n; 10601da177e4SLinus Torvalds changed = 1; 10611da177e4SLinus Torvalds } 10621da177e4SLinus Torvalds n = (i->max - min) % step; 10631da177e4SLinus Torvalds if (n != 0 || i->openmax) { 10641da177e4SLinus Torvalds i->max -= n; 10651da177e4SLinus Torvalds changed = 1; 10661da177e4SLinus Torvalds } 10671da177e4SLinus Torvalds if (snd_interval_checkempty(i)) { 10681da177e4SLinus Torvalds i->empty = 1; 10691da177e4SLinus Torvalds return -EINVAL; 10701da177e4SLinus Torvalds } 10711da177e4SLinus Torvalds return changed; 10721da177e4SLinus Torvalds } 10731da177e4SLinus Torvalds 10741da177e4SLinus Torvalds /* Info constraints helpers */ 10751da177e4SLinus Torvalds 10761da177e4SLinus Torvalds /** 10771da177e4SLinus Torvalds * snd_pcm_hw_rule_add - add the hw-constraint rule 10781da177e4SLinus Torvalds * @runtime: the pcm runtime instance 10791da177e4SLinus Torvalds * @cond: condition bits 10801da177e4SLinus Torvalds * @var: the variable to evaluate 10811da177e4SLinus Torvalds * @func: the evaluation function 10821da177e4SLinus Torvalds * @private: the private data pointer passed to function 10831da177e4SLinus Torvalds * @dep: the dependent variables 10841da177e4SLinus Torvalds * 10851da177e4SLinus Torvalds * Returns zero if successful, or a negative error code on failure. 10861da177e4SLinus Torvalds */ 1087877211f5STakashi Iwai int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, 10881da177e4SLinus Torvalds int var, 10891da177e4SLinus Torvalds snd_pcm_hw_rule_func_t func, void *private, 10901da177e4SLinus Torvalds int dep, ...) 10911da177e4SLinus Torvalds { 1092877211f5STakashi Iwai struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1093877211f5STakashi Iwai struct snd_pcm_hw_rule *c; 10941da177e4SLinus Torvalds unsigned int k; 10951da177e4SLinus Torvalds va_list args; 10961da177e4SLinus Torvalds va_start(args, dep); 10971da177e4SLinus Torvalds if (constrs->rules_num >= constrs->rules_all) { 1098877211f5STakashi Iwai struct snd_pcm_hw_rule *new; 10991da177e4SLinus Torvalds unsigned int new_rules = constrs->rules_all + 16; 11001da177e4SLinus Torvalds new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL); 110187a1c8aaSJesper Juhl if (!new) { 110287a1c8aaSJesper Juhl va_end(args); 11031da177e4SLinus Torvalds return -ENOMEM; 110487a1c8aaSJesper Juhl } 11051da177e4SLinus Torvalds if (constrs->rules) { 11061da177e4SLinus Torvalds memcpy(new, constrs->rules, 11071da177e4SLinus Torvalds constrs->rules_num * sizeof(*c)); 11081da177e4SLinus Torvalds kfree(constrs->rules); 11091da177e4SLinus Torvalds } 11101da177e4SLinus Torvalds constrs->rules = new; 11111da177e4SLinus Torvalds constrs->rules_all = new_rules; 11121da177e4SLinus Torvalds } 11131da177e4SLinus Torvalds c = &constrs->rules[constrs->rules_num]; 11141da177e4SLinus Torvalds c->cond = cond; 11151da177e4SLinus Torvalds c->func = func; 11161da177e4SLinus Torvalds c->var = var; 11171da177e4SLinus Torvalds c->private = private; 11181da177e4SLinus Torvalds k = 0; 11191da177e4SLinus Torvalds while (1) { 112087a1c8aaSJesper Juhl if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) { 112187a1c8aaSJesper Juhl va_end(args); 11227eaa943cSTakashi Iwai return -EINVAL; 112387a1c8aaSJesper Juhl } 11241da177e4SLinus Torvalds c->deps[k++] = dep; 11251da177e4SLinus Torvalds if (dep < 0) 11261da177e4SLinus Torvalds break; 11271da177e4SLinus Torvalds dep = va_arg(args, int); 11281da177e4SLinus Torvalds } 11291da177e4SLinus Torvalds constrs->rules_num++; 11301da177e4SLinus Torvalds va_end(args); 11311da177e4SLinus Torvalds return 0; 11321da177e4SLinus Torvalds } 11331da177e4SLinus Torvalds 1134e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_rule_add); 1135e88e8ae6STakashi Iwai 11361da177e4SLinus Torvalds /** 11371c85cc64SRandy Dunlap * snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint 1138df8db936STakashi Iwai * @runtime: PCM runtime instance 1139df8db936STakashi Iwai * @var: hw_params variable to apply the mask 1140df8db936STakashi Iwai * @mask: the bitmap mask 1141df8db936STakashi Iwai * 11421c85cc64SRandy Dunlap * Apply the constraint of the given bitmap mask to a 32-bit mask parameter. 11431da177e4SLinus Torvalds */ 1144877211f5STakashi Iwai int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 11451da177e4SLinus Torvalds u_int32_t mask) 11461da177e4SLinus Torvalds { 1147877211f5STakashi Iwai struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1148877211f5STakashi Iwai struct snd_mask *maskp = constrs_mask(constrs, var); 11491da177e4SLinus Torvalds *maskp->bits &= mask; 11501da177e4SLinus Torvalds memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ 11511da177e4SLinus Torvalds if (*maskp->bits == 0) 11521da177e4SLinus Torvalds return -EINVAL; 11531da177e4SLinus Torvalds return 0; 11541da177e4SLinus Torvalds } 11551da177e4SLinus Torvalds 11561da177e4SLinus Torvalds /** 11571c85cc64SRandy Dunlap * snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint 1158df8db936STakashi Iwai * @runtime: PCM runtime instance 1159df8db936STakashi Iwai * @var: hw_params variable to apply the mask 1160df8db936STakashi Iwai * @mask: the 64bit bitmap mask 1161df8db936STakashi Iwai * 11621c85cc64SRandy Dunlap * Apply the constraint of the given bitmap mask to a 64-bit mask parameter. 11631da177e4SLinus Torvalds */ 1164877211f5STakashi Iwai int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 11651da177e4SLinus Torvalds u_int64_t mask) 11661da177e4SLinus Torvalds { 1167877211f5STakashi Iwai struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1168877211f5STakashi Iwai struct snd_mask *maskp = constrs_mask(constrs, var); 11691da177e4SLinus Torvalds maskp->bits[0] &= (u_int32_t)mask; 11701da177e4SLinus Torvalds maskp->bits[1] &= (u_int32_t)(mask >> 32); 11711da177e4SLinus Torvalds memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ 11721da177e4SLinus Torvalds if (! maskp->bits[0] && ! maskp->bits[1]) 11731da177e4SLinus Torvalds return -EINVAL; 11741da177e4SLinus Torvalds return 0; 11751da177e4SLinus Torvalds } 11761da177e4SLinus Torvalds 11771da177e4SLinus Torvalds /** 11781c85cc64SRandy Dunlap * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval 1179df8db936STakashi Iwai * @runtime: PCM runtime instance 1180df8db936STakashi Iwai * @var: hw_params variable to apply the integer constraint 1181df8db936STakashi Iwai * 1182df8db936STakashi Iwai * Apply the constraint of integer to an interval parameter. 11831da177e4SLinus Torvalds */ 1184877211f5STakashi Iwai int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) 11851da177e4SLinus Torvalds { 1186877211f5STakashi Iwai struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 11871da177e4SLinus Torvalds return snd_interval_setinteger(constrs_interval(constrs, var)); 11881da177e4SLinus Torvalds } 11891da177e4SLinus Torvalds 1190e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); 1191e88e8ae6STakashi Iwai 11921da177e4SLinus Torvalds /** 11931c85cc64SRandy Dunlap * snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval 1194df8db936STakashi Iwai * @runtime: PCM runtime instance 1195df8db936STakashi Iwai * @var: hw_params variable to apply the range 1196df8db936STakashi Iwai * @min: the minimal value 1197df8db936STakashi Iwai * @max: the maximal value 1198df8db936STakashi Iwai * 1199df8db936STakashi Iwai * Apply the min/max range constraint to an interval parameter. 12001da177e4SLinus Torvalds */ 1201877211f5STakashi Iwai int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 12021da177e4SLinus Torvalds unsigned int min, unsigned int max) 12031da177e4SLinus Torvalds { 1204877211f5STakashi Iwai struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1205877211f5STakashi Iwai struct snd_interval t; 12061da177e4SLinus Torvalds t.min = min; 12071da177e4SLinus Torvalds t.max = max; 12081da177e4SLinus Torvalds t.openmin = t.openmax = 0; 12091da177e4SLinus Torvalds t.integer = 0; 12101da177e4SLinus Torvalds return snd_interval_refine(constrs_interval(constrs, var), &t); 12111da177e4SLinus Torvalds } 12121da177e4SLinus Torvalds 1213e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); 1214e88e8ae6STakashi Iwai 1215877211f5STakashi Iwai static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, 1216877211f5STakashi Iwai struct snd_pcm_hw_rule *rule) 12171da177e4SLinus Torvalds { 1218877211f5STakashi Iwai struct snd_pcm_hw_constraint_list *list = rule->private; 12191da177e4SLinus Torvalds return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); 12201da177e4SLinus Torvalds } 12211da177e4SLinus Torvalds 12221da177e4SLinus Torvalds 12231da177e4SLinus Torvalds /** 12241c85cc64SRandy Dunlap * snd_pcm_hw_constraint_list - apply a list of constraints to a parameter 1225df8db936STakashi Iwai * @runtime: PCM runtime instance 1226df8db936STakashi Iwai * @cond: condition bits 1227df8db936STakashi Iwai * @var: hw_params variable to apply the list constraint 1228df8db936STakashi Iwai * @l: list 1229df8db936STakashi Iwai * 1230df8db936STakashi Iwai * Apply the list of constraints to an interval parameter. 12311da177e4SLinus Torvalds */ 1232877211f5STakashi Iwai int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, 12331da177e4SLinus Torvalds unsigned int cond, 12341da177e4SLinus Torvalds snd_pcm_hw_param_t var, 1235877211f5STakashi Iwai struct snd_pcm_hw_constraint_list *l) 12361da177e4SLinus Torvalds { 12371da177e4SLinus Torvalds return snd_pcm_hw_rule_add(runtime, cond, var, 12381da177e4SLinus Torvalds snd_pcm_hw_rule_list, l, 12391da177e4SLinus Torvalds var, -1); 12401da177e4SLinus Torvalds } 12411da177e4SLinus Torvalds 1242e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_constraint_list); 1243e88e8ae6STakashi Iwai 1244877211f5STakashi Iwai static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, 1245877211f5STakashi Iwai struct snd_pcm_hw_rule *rule) 12461da177e4SLinus Torvalds { 1247877211f5STakashi Iwai struct snd_pcm_hw_constraint_ratnums *r = rule->private; 12481da177e4SLinus Torvalds unsigned int num = 0, den = 0; 12491da177e4SLinus Torvalds int err; 12501da177e4SLinus Torvalds err = snd_interval_ratnum(hw_param_interval(params, rule->var), 12511da177e4SLinus Torvalds r->nrats, r->rats, &num, &den); 12521da177e4SLinus Torvalds if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { 12531da177e4SLinus Torvalds params->rate_num = num; 12541da177e4SLinus Torvalds params->rate_den = den; 12551da177e4SLinus Torvalds } 12561da177e4SLinus Torvalds return err; 12571da177e4SLinus Torvalds } 12581da177e4SLinus Torvalds 12591da177e4SLinus Torvalds /** 12601c85cc64SRandy Dunlap * snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter 1261df8db936STakashi Iwai * @runtime: PCM runtime instance 1262df8db936STakashi Iwai * @cond: condition bits 1263df8db936STakashi Iwai * @var: hw_params variable to apply the ratnums constraint 1264877211f5STakashi Iwai * @r: struct snd_ratnums constriants 12651da177e4SLinus Torvalds */ 1266877211f5STakashi Iwai int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, 12671da177e4SLinus Torvalds unsigned int cond, 12681da177e4SLinus Torvalds snd_pcm_hw_param_t var, 1269877211f5STakashi Iwai struct snd_pcm_hw_constraint_ratnums *r) 12701da177e4SLinus Torvalds { 12711da177e4SLinus Torvalds return snd_pcm_hw_rule_add(runtime, cond, var, 12721da177e4SLinus Torvalds snd_pcm_hw_rule_ratnums, r, 12731da177e4SLinus Torvalds var, -1); 12741da177e4SLinus Torvalds } 12751da177e4SLinus Torvalds 1276e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); 1277e88e8ae6STakashi Iwai 1278877211f5STakashi Iwai static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, 1279877211f5STakashi Iwai struct snd_pcm_hw_rule *rule) 12801da177e4SLinus Torvalds { 1281877211f5STakashi Iwai struct snd_pcm_hw_constraint_ratdens *r = rule->private; 12821da177e4SLinus Torvalds unsigned int num = 0, den = 0; 12831da177e4SLinus Torvalds int err = snd_interval_ratden(hw_param_interval(params, rule->var), 12841da177e4SLinus Torvalds r->nrats, r->rats, &num, &den); 12851da177e4SLinus Torvalds if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { 12861da177e4SLinus Torvalds params->rate_num = num; 12871da177e4SLinus Torvalds params->rate_den = den; 12881da177e4SLinus Torvalds } 12891da177e4SLinus Torvalds return err; 12901da177e4SLinus Torvalds } 12911da177e4SLinus Torvalds 12921da177e4SLinus Torvalds /** 12931c85cc64SRandy Dunlap * snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter 1294df8db936STakashi Iwai * @runtime: PCM runtime instance 1295df8db936STakashi Iwai * @cond: condition bits 1296df8db936STakashi Iwai * @var: hw_params variable to apply the ratdens constraint 1297877211f5STakashi Iwai * @r: struct snd_ratdens constriants 12981da177e4SLinus Torvalds */ 1299877211f5STakashi Iwai int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, 13001da177e4SLinus Torvalds unsigned int cond, 13011da177e4SLinus Torvalds snd_pcm_hw_param_t var, 1302877211f5STakashi Iwai struct snd_pcm_hw_constraint_ratdens *r) 13031da177e4SLinus Torvalds { 13041da177e4SLinus Torvalds return snd_pcm_hw_rule_add(runtime, cond, var, 13051da177e4SLinus Torvalds snd_pcm_hw_rule_ratdens, r, 13061da177e4SLinus Torvalds var, -1); 13071da177e4SLinus Torvalds } 13081da177e4SLinus Torvalds 1309e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); 1310e88e8ae6STakashi Iwai 1311877211f5STakashi Iwai static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, 1312877211f5STakashi Iwai struct snd_pcm_hw_rule *rule) 13131da177e4SLinus Torvalds { 13141da177e4SLinus Torvalds unsigned int l = (unsigned long) rule->private; 13151da177e4SLinus Torvalds int width = l & 0xffff; 13161da177e4SLinus Torvalds unsigned int msbits = l >> 16; 1317877211f5STakashi Iwai struct snd_interval *i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); 13181da177e4SLinus Torvalds if (snd_interval_single(i) && snd_interval_value(i) == width) 13191da177e4SLinus Torvalds params->msbits = msbits; 13201da177e4SLinus Torvalds return 0; 13211da177e4SLinus Torvalds } 13221da177e4SLinus Torvalds 13231da177e4SLinus Torvalds /** 13241c85cc64SRandy Dunlap * snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule 1325df8db936STakashi Iwai * @runtime: PCM runtime instance 1326df8db936STakashi Iwai * @cond: condition bits 1327df8db936STakashi Iwai * @width: sample bits width 1328df8db936STakashi Iwai * @msbits: msbits width 13291da177e4SLinus Torvalds */ 1330877211f5STakashi Iwai int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, 13311da177e4SLinus Torvalds unsigned int cond, 13321da177e4SLinus Torvalds unsigned int width, 13331da177e4SLinus Torvalds unsigned int msbits) 13341da177e4SLinus Torvalds { 13351da177e4SLinus Torvalds unsigned long l = (msbits << 16) | width; 13361da177e4SLinus Torvalds return snd_pcm_hw_rule_add(runtime, cond, -1, 13371da177e4SLinus Torvalds snd_pcm_hw_rule_msbits, 13381da177e4SLinus Torvalds (void*) l, 13391da177e4SLinus Torvalds SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 13401da177e4SLinus Torvalds } 13411da177e4SLinus Torvalds 1342e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); 1343e88e8ae6STakashi Iwai 1344877211f5STakashi Iwai static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, 1345877211f5STakashi Iwai struct snd_pcm_hw_rule *rule) 13461da177e4SLinus Torvalds { 13471da177e4SLinus Torvalds unsigned long step = (unsigned long) rule->private; 13481da177e4SLinus Torvalds return snd_interval_step(hw_param_interval(params, rule->var), 0, step); 13491da177e4SLinus Torvalds } 13501da177e4SLinus Torvalds 13511da177e4SLinus Torvalds /** 13521c85cc64SRandy Dunlap * snd_pcm_hw_constraint_step - add a hw constraint step rule 1353df8db936STakashi Iwai * @runtime: PCM runtime instance 1354df8db936STakashi Iwai * @cond: condition bits 1355df8db936STakashi Iwai * @var: hw_params variable to apply the step constraint 1356df8db936STakashi Iwai * @step: step size 13571da177e4SLinus Torvalds */ 1358877211f5STakashi Iwai int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, 13591da177e4SLinus Torvalds unsigned int cond, 13601da177e4SLinus Torvalds snd_pcm_hw_param_t var, 13611da177e4SLinus Torvalds unsigned long step) 13621da177e4SLinus Torvalds { 13631da177e4SLinus Torvalds return snd_pcm_hw_rule_add(runtime, cond, var, 13641da177e4SLinus Torvalds snd_pcm_hw_rule_step, (void *) step, 13651da177e4SLinus Torvalds var, -1); 13661da177e4SLinus Torvalds } 13671da177e4SLinus Torvalds 1368e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_constraint_step); 1369e88e8ae6STakashi Iwai 1370877211f5STakashi Iwai static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) 13711da177e4SLinus Torvalds { 137267c39317SMarcin Ślusarz static unsigned int pow2_sizes[] = { 13731da177e4SLinus Torvalds 1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, 13741da177e4SLinus Torvalds 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, 13751da177e4SLinus Torvalds 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, 13761da177e4SLinus Torvalds 1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30 13771da177e4SLinus Torvalds }; 13781da177e4SLinus Torvalds return snd_interval_list(hw_param_interval(params, rule->var), 13791da177e4SLinus Torvalds ARRAY_SIZE(pow2_sizes), pow2_sizes, 0); 13801da177e4SLinus Torvalds } 13811da177e4SLinus Torvalds 13821da177e4SLinus Torvalds /** 13831c85cc64SRandy Dunlap * snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule 1384df8db936STakashi Iwai * @runtime: PCM runtime instance 1385df8db936STakashi Iwai * @cond: condition bits 1386df8db936STakashi Iwai * @var: hw_params variable to apply the power-of-2 constraint 13871da177e4SLinus Torvalds */ 1388877211f5STakashi Iwai int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, 13891da177e4SLinus Torvalds unsigned int cond, 13901da177e4SLinus Torvalds snd_pcm_hw_param_t var) 13911da177e4SLinus Torvalds { 13921da177e4SLinus Torvalds return snd_pcm_hw_rule_add(runtime, cond, var, 13931da177e4SLinus Torvalds snd_pcm_hw_rule_pow2, NULL, 13941da177e4SLinus Torvalds var, -1); 13951da177e4SLinus Torvalds } 13961da177e4SLinus Torvalds 1397e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); 1398e88e8ae6STakashi Iwai 1399877211f5STakashi Iwai static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, 1400123992f7SAdrian Bunk snd_pcm_hw_param_t var) 14011da177e4SLinus Torvalds { 14021da177e4SLinus Torvalds if (hw_is_mask(var)) { 14031da177e4SLinus Torvalds snd_mask_any(hw_param_mask(params, var)); 14041da177e4SLinus Torvalds params->cmask |= 1 << var; 14051da177e4SLinus Torvalds params->rmask |= 1 << var; 14061da177e4SLinus Torvalds return; 14071da177e4SLinus Torvalds } 14081da177e4SLinus Torvalds if (hw_is_interval(var)) { 14091da177e4SLinus Torvalds snd_interval_any(hw_param_interval(params, var)); 14101da177e4SLinus Torvalds params->cmask |= 1 << var; 14111da177e4SLinus Torvalds params->rmask |= 1 << var; 14121da177e4SLinus Torvalds return; 14131da177e4SLinus Torvalds } 14141da177e4SLinus Torvalds snd_BUG(); 14151da177e4SLinus Torvalds } 14161da177e4SLinus Torvalds 1417877211f5STakashi Iwai void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) 14181da177e4SLinus Torvalds { 14191da177e4SLinus Torvalds unsigned int k; 14201da177e4SLinus Torvalds memset(params, 0, sizeof(*params)); 14211da177e4SLinus Torvalds for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) 14221da177e4SLinus Torvalds _snd_pcm_hw_param_any(params, k); 14231da177e4SLinus Torvalds for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 14241da177e4SLinus Torvalds _snd_pcm_hw_param_any(params, k); 14251da177e4SLinus Torvalds params->info = ~0U; 14261da177e4SLinus Torvalds } 14271da177e4SLinus Torvalds 1428e88e8ae6STakashi Iwai EXPORT_SYMBOL(_snd_pcm_hw_params_any); 14291da177e4SLinus Torvalds 14301da177e4SLinus Torvalds /** 14311c85cc64SRandy Dunlap * snd_pcm_hw_param_value - return @params field @var value 1432df8db936STakashi Iwai * @params: the hw_params instance 1433df8db936STakashi Iwai * @var: parameter to retrieve 14341c85cc64SRandy Dunlap * @dir: pointer to the direction (-1,0,1) or %NULL 14351da177e4SLinus Torvalds * 14361c85cc64SRandy Dunlap * Return the value for field @var if it's fixed in configuration space 14371c85cc64SRandy Dunlap * defined by @params. Return -%EINVAL otherwise. 14381da177e4SLinus Torvalds */ 1439e88e8ae6STakashi Iwai int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, 14401da177e4SLinus Torvalds snd_pcm_hw_param_t var, int *dir) 14411da177e4SLinus Torvalds { 14421da177e4SLinus Torvalds if (hw_is_mask(var)) { 1443877211f5STakashi Iwai const struct snd_mask *mask = hw_param_mask_c(params, var); 14441da177e4SLinus Torvalds if (!snd_mask_single(mask)) 14451da177e4SLinus Torvalds return -EINVAL; 14461da177e4SLinus Torvalds if (dir) 14471da177e4SLinus Torvalds *dir = 0; 14481da177e4SLinus Torvalds return snd_mask_value(mask); 14491da177e4SLinus Torvalds } 14501da177e4SLinus Torvalds if (hw_is_interval(var)) { 1451877211f5STakashi Iwai const struct snd_interval *i = hw_param_interval_c(params, var); 14521da177e4SLinus Torvalds if (!snd_interval_single(i)) 14531da177e4SLinus Torvalds return -EINVAL; 14541da177e4SLinus Torvalds if (dir) 14551da177e4SLinus Torvalds *dir = i->openmin; 14561da177e4SLinus Torvalds return snd_interval_value(i); 14571da177e4SLinus Torvalds } 14581da177e4SLinus Torvalds return -EINVAL; 14591da177e4SLinus Torvalds } 14601da177e4SLinus Torvalds 1461e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_param_value); 14621da177e4SLinus Torvalds 1463877211f5STakashi Iwai void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, 14641da177e4SLinus Torvalds snd_pcm_hw_param_t var) 14651da177e4SLinus Torvalds { 14661da177e4SLinus Torvalds if (hw_is_mask(var)) { 14671da177e4SLinus Torvalds snd_mask_none(hw_param_mask(params, var)); 14681da177e4SLinus Torvalds params->cmask |= 1 << var; 14691da177e4SLinus Torvalds params->rmask |= 1 << var; 14701da177e4SLinus Torvalds } else if (hw_is_interval(var)) { 14711da177e4SLinus Torvalds snd_interval_none(hw_param_interval(params, var)); 14721da177e4SLinus Torvalds params->cmask |= 1 << var; 14731da177e4SLinus Torvalds params->rmask |= 1 << var; 14741da177e4SLinus Torvalds } else { 14751da177e4SLinus Torvalds snd_BUG(); 14761da177e4SLinus Torvalds } 14771da177e4SLinus Torvalds } 14781da177e4SLinus Torvalds 1479e88e8ae6STakashi Iwai EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); 14801da177e4SLinus Torvalds 1481877211f5STakashi Iwai static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, 14821da177e4SLinus Torvalds snd_pcm_hw_param_t var) 14831da177e4SLinus Torvalds { 14841da177e4SLinus Torvalds int changed; 14851da177e4SLinus Torvalds if (hw_is_mask(var)) 14861da177e4SLinus Torvalds changed = snd_mask_refine_first(hw_param_mask(params, var)); 14871da177e4SLinus Torvalds else if (hw_is_interval(var)) 14881da177e4SLinus Torvalds changed = snd_interval_refine_first(hw_param_interval(params, var)); 14892f4ca8e5STakashi Iwai else 14901da177e4SLinus Torvalds return -EINVAL; 14911da177e4SLinus Torvalds if (changed) { 14921da177e4SLinus Torvalds params->cmask |= 1 << var; 14931da177e4SLinus Torvalds params->rmask |= 1 << var; 14941da177e4SLinus Torvalds } 14951da177e4SLinus Torvalds return changed; 14961da177e4SLinus Torvalds } 14971da177e4SLinus Torvalds 14981da177e4SLinus Torvalds 14991da177e4SLinus Torvalds /** 15001c85cc64SRandy Dunlap * snd_pcm_hw_param_first - refine config space and return minimum value 1501df8db936STakashi Iwai * @pcm: PCM instance 1502df8db936STakashi Iwai * @params: the hw_params instance 1503df8db936STakashi Iwai * @var: parameter to retrieve 15041c85cc64SRandy Dunlap * @dir: pointer to the direction (-1,0,1) or %NULL 15051da177e4SLinus Torvalds * 15061c85cc64SRandy Dunlap * Inside configuration space defined by @params remove from @var all 15071da177e4SLinus Torvalds * values > minimum. Reduce configuration space accordingly. 15081da177e4SLinus Torvalds * Return the minimum. 15091da177e4SLinus Torvalds */ 1510e88e8ae6STakashi Iwai int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, 1511877211f5STakashi Iwai struct snd_pcm_hw_params *params, 15121da177e4SLinus Torvalds snd_pcm_hw_param_t var, int *dir) 15131da177e4SLinus Torvalds { 15141da177e4SLinus Torvalds int changed = _snd_pcm_hw_param_first(params, var); 15151da177e4SLinus Torvalds if (changed < 0) 15161da177e4SLinus Torvalds return changed; 15171da177e4SLinus Torvalds if (params->rmask) { 15181da177e4SLinus Torvalds int err = snd_pcm_hw_refine(pcm, params); 15197eaa943cSTakashi Iwai if (snd_BUG_ON(err < 0)) 15207eaa943cSTakashi Iwai return err; 15211da177e4SLinus Torvalds } 15221da177e4SLinus Torvalds return snd_pcm_hw_param_value(params, var, dir); 15231da177e4SLinus Torvalds } 15241da177e4SLinus Torvalds 1525e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_param_first); 1526e88e8ae6STakashi Iwai 1527877211f5STakashi Iwai static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, 15281da177e4SLinus Torvalds snd_pcm_hw_param_t var) 15291da177e4SLinus Torvalds { 15301da177e4SLinus Torvalds int changed; 15311da177e4SLinus Torvalds if (hw_is_mask(var)) 15321da177e4SLinus Torvalds changed = snd_mask_refine_last(hw_param_mask(params, var)); 15331da177e4SLinus Torvalds else if (hw_is_interval(var)) 15341da177e4SLinus Torvalds changed = snd_interval_refine_last(hw_param_interval(params, var)); 15352f4ca8e5STakashi Iwai else 15361da177e4SLinus Torvalds return -EINVAL; 15371da177e4SLinus Torvalds if (changed) { 15381da177e4SLinus Torvalds params->cmask |= 1 << var; 15391da177e4SLinus Torvalds params->rmask |= 1 << var; 15401da177e4SLinus Torvalds } 15411da177e4SLinus Torvalds return changed; 15421da177e4SLinus Torvalds } 15431da177e4SLinus Torvalds 15441da177e4SLinus Torvalds 15451da177e4SLinus Torvalds /** 15461c85cc64SRandy Dunlap * snd_pcm_hw_param_last - refine config space and return maximum value 1547df8db936STakashi Iwai * @pcm: PCM instance 1548df8db936STakashi Iwai * @params: the hw_params instance 1549df8db936STakashi Iwai * @var: parameter to retrieve 15501c85cc64SRandy Dunlap * @dir: pointer to the direction (-1,0,1) or %NULL 15511da177e4SLinus Torvalds * 15521c85cc64SRandy Dunlap * Inside configuration space defined by @params remove from @var all 15531da177e4SLinus Torvalds * values < maximum. Reduce configuration space accordingly. 15541da177e4SLinus Torvalds * Return the maximum. 15551da177e4SLinus Torvalds */ 1556e88e8ae6STakashi Iwai int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, 1557877211f5STakashi Iwai struct snd_pcm_hw_params *params, 15581da177e4SLinus Torvalds snd_pcm_hw_param_t var, int *dir) 15591da177e4SLinus Torvalds { 15601da177e4SLinus Torvalds int changed = _snd_pcm_hw_param_last(params, var); 15611da177e4SLinus Torvalds if (changed < 0) 15621da177e4SLinus Torvalds return changed; 15631da177e4SLinus Torvalds if (params->rmask) { 15641da177e4SLinus Torvalds int err = snd_pcm_hw_refine(pcm, params); 15657eaa943cSTakashi Iwai if (snd_BUG_ON(err < 0)) 15667eaa943cSTakashi Iwai return err; 15671da177e4SLinus Torvalds } 15681da177e4SLinus Torvalds return snd_pcm_hw_param_value(params, var, dir); 15691da177e4SLinus Torvalds } 15701da177e4SLinus Torvalds 1571e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_param_last); 15721da177e4SLinus Torvalds 15731da177e4SLinus Torvalds /** 15741c85cc64SRandy Dunlap * snd_pcm_hw_param_choose - choose a configuration defined by @params 1575df8db936STakashi Iwai * @pcm: PCM instance 1576df8db936STakashi Iwai * @params: the hw_params instance 15771da177e4SLinus Torvalds * 15781c85cc64SRandy Dunlap * Choose one configuration from configuration space defined by @params. 15791da177e4SLinus Torvalds * The configuration chosen is that obtained fixing in this order: 15801da177e4SLinus Torvalds * first access, first format, first subformat, min channels, 15811da177e4SLinus Torvalds * min rate, min period time, max buffer size, min tick time 15821da177e4SLinus Torvalds */ 15832f4ca8e5STakashi Iwai int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, 15842f4ca8e5STakashi Iwai struct snd_pcm_hw_params *params) 15851da177e4SLinus Torvalds { 15862f4ca8e5STakashi Iwai static int vars[] = { 15872f4ca8e5STakashi Iwai SNDRV_PCM_HW_PARAM_ACCESS, 15882f4ca8e5STakashi Iwai SNDRV_PCM_HW_PARAM_FORMAT, 15892f4ca8e5STakashi Iwai SNDRV_PCM_HW_PARAM_SUBFORMAT, 15902f4ca8e5STakashi Iwai SNDRV_PCM_HW_PARAM_CHANNELS, 15912f4ca8e5STakashi Iwai SNDRV_PCM_HW_PARAM_RATE, 15922f4ca8e5STakashi Iwai SNDRV_PCM_HW_PARAM_PERIOD_TIME, 15932f4ca8e5STakashi Iwai SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 15942f4ca8e5STakashi Iwai SNDRV_PCM_HW_PARAM_TICK_TIME, 15952f4ca8e5STakashi Iwai -1 15962f4ca8e5STakashi Iwai }; 15972f4ca8e5STakashi Iwai int err, *v; 15981da177e4SLinus Torvalds 15992f4ca8e5STakashi Iwai for (v = vars; *v != -1; v++) { 16002f4ca8e5STakashi Iwai if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE) 16012f4ca8e5STakashi Iwai err = snd_pcm_hw_param_first(pcm, params, *v, NULL); 16022f4ca8e5STakashi Iwai else 16032f4ca8e5STakashi Iwai err = snd_pcm_hw_param_last(pcm, params, *v, NULL); 16047eaa943cSTakashi Iwai if (snd_BUG_ON(err < 0)) 16057eaa943cSTakashi Iwai return err; 16062f4ca8e5STakashi Iwai } 16071da177e4SLinus Torvalds return 0; 16081da177e4SLinus Torvalds } 16091da177e4SLinus Torvalds 1610877211f5STakashi Iwai static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, 16111da177e4SLinus Torvalds void *arg) 16121da177e4SLinus Torvalds { 1613877211f5STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 16141da177e4SLinus Torvalds unsigned long flags; 16151da177e4SLinus Torvalds snd_pcm_stream_lock_irqsave(substream, flags); 16161da177e4SLinus Torvalds if (snd_pcm_running(substream) && 16171da177e4SLinus Torvalds snd_pcm_update_hw_ptr(substream) >= 0) 16181da177e4SLinus Torvalds runtime->status->hw_ptr %= runtime->buffer_size; 16191da177e4SLinus Torvalds else 16201da177e4SLinus Torvalds runtime->status->hw_ptr = 0; 16211da177e4SLinus Torvalds snd_pcm_stream_unlock_irqrestore(substream, flags); 16221da177e4SLinus Torvalds return 0; 16231da177e4SLinus Torvalds } 16241da177e4SLinus Torvalds 1625877211f5STakashi Iwai static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, 16261da177e4SLinus Torvalds void *arg) 16271da177e4SLinus Torvalds { 1628877211f5STakashi Iwai struct snd_pcm_channel_info *info = arg; 1629877211f5STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 16301da177e4SLinus Torvalds int width; 16311da177e4SLinus Torvalds if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { 16321da177e4SLinus Torvalds info->offset = -1; 16331da177e4SLinus Torvalds return 0; 16341da177e4SLinus Torvalds } 16351da177e4SLinus Torvalds width = snd_pcm_format_physical_width(runtime->format); 16361da177e4SLinus Torvalds if (width < 0) 16371da177e4SLinus Torvalds return width; 16381da177e4SLinus Torvalds info->offset = 0; 16391da177e4SLinus Torvalds switch (runtime->access) { 16401da177e4SLinus Torvalds case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED: 16411da177e4SLinus Torvalds case SNDRV_PCM_ACCESS_RW_INTERLEAVED: 16421da177e4SLinus Torvalds info->first = info->channel * width; 16431da177e4SLinus Torvalds info->step = runtime->channels * width; 16441da177e4SLinus Torvalds break; 16451da177e4SLinus Torvalds case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED: 16461da177e4SLinus Torvalds case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED: 16471da177e4SLinus Torvalds { 16481da177e4SLinus Torvalds size_t size = runtime->dma_bytes / runtime->channels; 16491da177e4SLinus Torvalds info->first = info->channel * size * 8; 16501da177e4SLinus Torvalds info->step = width; 16511da177e4SLinus Torvalds break; 16521da177e4SLinus Torvalds } 16531da177e4SLinus Torvalds default: 16541da177e4SLinus Torvalds snd_BUG(); 16551da177e4SLinus Torvalds break; 16561da177e4SLinus Torvalds } 16571da177e4SLinus Torvalds return 0; 16581da177e4SLinus Torvalds } 16591da177e4SLinus Torvalds 16608bea869cSJaroslav Kysela static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, 16618bea869cSJaroslav Kysela void *arg) 16628bea869cSJaroslav Kysela { 16638bea869cSJaroslav Kysela struct snd_pcm_hw_params *params = arg; 16648bea869cSJaroslav Kysela snd_pcm_format_t format; 16658bea869cSJaroslav Kysela int channels, width; 16668bea869cSJaroslav Kysela 16678bea869cSJaroslav Kysela params->fifo_size = substream->runtime->hw.fifo_size; 16688bea869cSJaroslav Kysela if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { 16698bea869cSJaroslav Kysela format = params_format(params); 16708bea869cSJaroslav Kysela channels = params_channels(params); 16718bea869cSJaroslav Kysela width = snd_pcm_format_physical_width(format); 16728bea869cSJaroslav Kysela params->fifo_size /= width * channels; 16738bea869cSJaroslav Kysela } 16748bea869cSJaroslav Kysela return 0; 16758bea869cSJaroslav Kysela } 16768bea869cSJaroslav Kysela 16771da177e4SLinus Torvalds /** 16781da177e4SLinus Torvalds * snd_pcm_lib_ioctl - a generic PCM ioctl callback 16791da177e4SLinus Torvalds * @substream: the pcm substream instance 16801da177e4SLinus Torvalds * @cmd: ioctl command 16811da177e4SLinus Torvalds * @arg: ioctl argument 16821da177e4SLinus Torvalds * 16831da177e4SLinus Torvalds * Processes the generic ioctl commands for PCM. 16841da177e4SLinus Torvalds * Can be passed as the ioctl callback for PCM ops. 16851da177e4SLinus Torvalds * 16861da177e4SLinus Torvalds * Returns zero if successful, or a negative error code on failure. 16871da177e4SLinus Torvalds */ 1688877211f5STakashi Iwai int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, 16891da177e4SLinus Torvalds unsigned int cmd, void *arg) 16901da177e4SLinus Torvalds { 16911da177e4SLinus Torvalds switch (cmd) { 16921da177e4SLinus Torvalds case SNDRV_PCM_IOCTL1_INFO: 16931da177e4SLinus Torvalds return 0; 16941da177e4SLinus Torvalds case SNDRV_PCM_IOCTL1_RESET: 16951da177e4SLinus Torvalds return snd_pcm_lib_ioctl_reset(substream, arg); 16961da177e4SLinus Torvalds case SNDRV_PCM_IOCTL1_CHANNEL_INFO: 16971da177e4SLinus Torvalds return snd_pcm_lib_ioctl_channel_info(substream, arg); 16988bea869cSJaroslav Kysela case SNDRV_PCM_IOCTL1_FIFO_SIZE: 16998bea869cSJaroslav Kysela return snd_pcm_lib_ioctl_fifo_size(substream, arg); 17001da177e4SLinus Torvalds } 17011da177e4SLinus Torvalds return -ENXIO; 17021da177e4SLinus Torvalds } 17031da177e4SLinus Torvalds 1704e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_lib_ioctl); 1705e88e8ae6STakashi Iwai 17061da177e4SLinus Torvalds /** 17071da177e4SLinus Torvalds * snd_pcm_period_elapsed - update the pcm status for the next period 17081da177e4SLinus Torvalds * @substream: the pcm substream instance 17091da177e4SLinus Torvalds * 17101da177e4SLinus Torvalds * This function is called from the interrupt handler when the 17111da177e4SLinus Torvalds * PCM has processed the period size. It will update the current 171231e8960bSTakashi Iwai * pointer, wake up sleepers, etc. 17131da177e4SLinus Torvalds * 17141da177e4SLinus Torvalds * Even if more than one periods have elapsed since the last call, you 17151da177e4SLinus Torvalds * have to call this only once. 17161da177e4SLinus Torvalds */ 1717877211f5STakashi Iwai void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) 17181da177e4SLinus Torvalds { 1719877211f5STakashi Iwai struct snd_pcm_runtime *runtime; 17201da177e4SLinus Torvalds unsigned long flags; 17211da177e4SLinus Torvalds 17227eaa943cSTakashi Iwai if (PCM_RUNTIME_CHECK(substream)) 17237eaa943cSTakashi Iwai return; 17241da177e4SLinus Torvalds runtime = substream->runtime; 17251da177e4SLinus Torvalds 17261da177e4SLinus Torvalds if (runtime->transfer_ack_begin) 17271da177e4SLinus Torvalds runtime->transfer_ack_begin(substream); 17281da177e4SLinus Torvalds 17291da177e4SLinus Torvalds snd_pcm_stream_lock_irqsave(substream, flags); 17301da177e4SLinus Torvalds if (!snd_pcm_running(substream) || 1731f240406bSJaroslav Kysela snd_pcm_update_hw_ptr0(substream, 1) < 0) 17321da177e4SLinus Torvalds goto _end; 17331da177e4SLinus Torvalds 17341da177e4SLinus Torvalds if (substream->timer_running) 17351da177e4SLinus Torvalds snd_timer_interrupt(substream->timer, 1); 17361da177e4SLinus Torvalds _end: 17371da177e4SLinus Torvalds snd_pcm_stream_unlock_irqrestore(substream, flags); 17381da177e4SLinus Torvalds if (runtime->transfer_ack_end) 17391da177e4SLinus Torvalds runtime->transfer_ack_end(substream); 17401da177e4SLinus Torvalds kill_fasync(&runtime->fasync, SIGIO, POLL_IN); 17411da177e4SLinus Torvalds } 17421da177e4SLinus Torvalds 1743e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_period_elapsed); 1744e88e8ae6STakashi Iwai 174513075510STakashi Iwai /* 174613075510STakashi Iwai * Wait until avail_min data becomes available 174713075510STakashi Iwai * Returns a negative error code if any error occurs during operation. 174813075510STakashi Iwai * The available space is stored on availp. When err = 0 and avail = 0 174913075510STakashi Iwai * on the capture stream, it indicates the stream is in DRAINING state. 175013075510STakashi Iwai */ 17515daeba34SDavid Dillow static int wait_for_avail(struct snd_pcm_substream *substream, 175213075510STakashi Iwai snd_pcm_uframes_t *availp) 175313075510STakashi Iwai { 175413075510STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 175513075510STakashi Iwai int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; 175613075510STakashi Iwai wait_queue_t wait; 175713075510STakashi Iwai int err = 0; 175813075510STakashi Iwai snd_pcm_uframes_t avail = 0; 175913075510STakashi Iwai long tout; 176013075510STakashi Iwai 176113075510STakashi Iwai init_waitqueue_entry(&wait, current); 1762c91a988dSJaroslav Kysela add_wait_queue(&runtime->tsleep, &wait); 176313075510STakashi Iwai for (;;) { 176413075510STakashi Iwai if (signal_pending(current)) { 176513075510STakashi Iwai err = -ERESTARTSYS; 176613075510STakashi Iwai break; 176713075510STakashi Iwai } 176813075510STakashi Iwai set_current_state(TASK_INTERRUPTIBLE); 176913075510STakashi Iwai snd_pcm_stream_unlock_irq(substream); 177013075510STakashi Iwai tout = schedule_timeout(msecs_to_jiffies(10000)); 177113075510STakashi Iwai snd_pcm_stream_lock_irq(substream); 177213075510STakashi Iwai switch (runtime->status->state) { 177313075510STakashi Iwai case SNDRV_PCM_STATE_SUSPENDED: 177413075510STakashi Iwai err = -ESTRPIPE; 177513075510STakashi Iwai goto _endloop; 177613075510STakashi Iwai case SNDRV_PCM_STATE_XRUN: 177713075510STakashi Iwai err = -EPIPE; 177813075510STakashi Iwai goto _endloop; 177913075510STakashi Iwai case SNDRV_PCM_STATE_DRAINING: 178013075510STakashi Iwai if (is_playback) 178113075510STakashi Iwai err = -EPIPE; 178213075510STakashi Iwai else 178313075510STakashi Iwai avail = 0; /* indicate draining */ 178413075510STakashi Iwai goto _endloop; 178513075510STakashi Iwai case SNDRV_PCM_STATE_OPEN: 178613075510STakashi Iwai case SNDRV_PCM_STATE_SETUP: 178713075510STakashi Iwai case SNDRV_PCM_STATE_DISCONNECTED: 178813075510STakashi Iwai err = -EBADFD; 178913075510STakashi Iwai goto _endloop; 179013075510STakashi Iwai } 179113075510STakashi Iwai if (!tout) { 179213075510STakashi Iwai snd_printd("%s write error (DMA or IRQ trouble?)\n", 179313075510STakashi Iwai is_playback ? "playback" : "capture"); 179413075510STakashi Iwai err = -EIO; 179513075510STakashi Iwai break; 179613075510STakashi Iwai } 179713075510STakashi Iwai if (is_playback) 179813075510STakashi Iwai avail = snd_pcm_playback_avail(runtime); 179913075510STakashi Iwai else 180013075510STakashi Iwai avail = snd_pcm_capture_avail(runtime); 18015daeba34SDavid Dillow if (avail >= runtime->twake) 180213075510STakashi Iwai break; 180313075510STakashi Iwai } 180413075510STakashi Iwai _endloop: 1805c91a988dSJaroslav Kysela remove_wait_queue(&runtime->tsleep, &wait); 180613075510STakashi Iwai *availp = avail; 180713075510STakashi Iwai return err; 180813075510STakashi Iwai } 180913075510STakashi Iwai 1810877211f5STakashi Iwai static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream, 18111da177e4SLinus Torvalds unsigned int hwoff, 18121da177e4SLinus Torvalds unsigned long data, unsigned int off, 18131da177e4SLinus Torvalds snd_pcm_uframes_t frames) 18141da177e4SLinus Torvalds { 1815877211f5STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 18161da177e4SLinus Torvalds int err; 18171da177e4SLinus Torvalds char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); 18181da177e4SLinus Torvalds if (substream->ops->copy) { 18191da177e4SLinus Torvalds if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) 18201da177e4SLinus Torvalds return err; 18211da177e4SLinus Torvalds } else { 18221da177e4SLinus Torvalds char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); 18231da177e4SLinus Torvalds if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames))) 18241da177e4SLinus Torvalds return -EFAULT; 18251da177e4SLinus Torvalds } 18261da177e4SLinus Torvalds return 0; 18271da177e4SLinus Torvalds } 18281da177e4SLinus Torvalds 1829877211f5STakashi Iwai typedef int (*transfer_f)(struct snd_pcm_substream *substream, unsigned int hwoff, 18301da177e4SLinus Torvalds unsigned long data, unsigned int off, 18311da177e4SLinus Torvalds snd_pcm_uframes_t size); 18321da177e4SLinus Torvalds 1833877211f5STakashi Iwai static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream, 18341da177e4SLinus Torvalds unsigned long data, 18351da177e4SLinus Torvalds snd_pcm_uframes_t size, 18361da177e4SLinus Torvalds int nonblock, 18371da177e4SLinus Torvalds transfer_f transfer) 18381da177e4SLinus Torvalds { 1839877211f5STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 18401da177e4SLinus Torvalds snd_pcm_uframes_t xfer = 0; 18411da177e4SLinus Torvalds snd_pcm_uframes_t offset = 0; 18421da177e4SLinus Torvalds int err = 0; 18431da177e4SLinus Torvalds 18441da177e4SLinus Torvalds if (size == 0) 18451da177e4SLinus Torvalds return 0; 18461da177e4SLinus Torvalds 18471da177e4SLinus Torvalds snd_pcm_stream_lock_irq(substream); 18481da177e4SLinus Torvalds switch (runtime->status->state) { 18491da177e4SLinus Torvalds case SNDRV_PCM_STATE_PREPARED: 18501da177e4SLinus Torvalds case SNDRV_PCM_STATE_RUNNING: 18511da177e4SLinus Torvalds case SNDRV_PCM_STATE_PAUSED: 18521da177e4SLinus Torvalds break; 18531da177e4SLinus Torvalds case SNDRV_PCM_STATE_XRUN: 18541da177e4SLinus Torvalds err = -EPIPE; 18551da177e4SLinus Torvalds goto _end_unlock; 18561da177e4SLinus Torvalds case SNDRV_PCM_STATE_SUSPENDED: 18571da177e4SLinus Torvalds err = -ESTRPIPE; 18581da177e4SLinus Torvalds goto _end_unlock; 18591da177e4SLinus Torvalds default: 18601da177e4SLinus Torvalds err = -EBADFD; 18611da177e4SLinus Torvalds goto _end_unlock; 18621da177e4SLinus Torvalds } 18631da177e4SLinus Torvalds 18645daeba34SDavid Dillow runtime->twake = runtime->control->avail_min ? : 1; 18651da177e4SLinus Torvalds while (size > 0) { 18661da177e4SLinus Torvalds snd_pcm_uframes_t frames, appl_ptr, appl_ofs; 18671da177e4SLinus Torvalds snd_pcm_uframes_t avail; 18681da177e4SLinus Torvalds snd_pcm_uframes_t cont; 186931e8960bSTakashi Iwai if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) 18701da177e4SLinus Torvalds snd_pcm_update_hw_ptr(substream); 18711da177e4SLinus Torvalds avail = snd_pcm_playback_avail(runtime); 187213075510STakashi Iwai if (!avail) { 18731da177e4SLinus Torvalds if (nonblock) { 18741da177e4SLinus Torvalds err = -EAGAIN; 18751da177e4SLinus Torvalds goto _end_unlock; 18761da177e4SLinus Torvalds } 18775daeba34SDavid Dillow runtime->twake = min_t(snd_pcm_uframes_t, size, 18785daeba34SDavid Dillow runtime->control->avail_min ? : 1); 18795daeba34SDavid Dillow err = wait_for_avail(substream, &avail); 188013075510STakashi Iwai if (err < 0) 18811da177e4SLinus Torvalds goto _end_unlock; 18821da177e4SLinus Torvalds } 18831da177e4SLinus Torvalds frames = size > avail ? avail : size; 18841da177e4SLinus Torvalds cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; 18851da177e4SLinus Torvalds if (frames > cont) 18861da177e4SLinus Torvalds frames = cont; 18877eaa943cSTakashi Iwai if (snd_BUG_ON(!frames)) { 1888c91a988dSJaroslav Kysela runtime->twake = 0; 18897eaa943cSTakashi Iwai snd_pcm_stream_unlock_irq(substream); 18907eaa943cSTakashi Iwai return -EINVAL; 18917eaa943cSTakashi Iwai } 18921da177e4SLinus Torvalds appl_ptr = runtime->control->appl_ptr; 18931da177e4SLinus Torvalds appl_ofs = appl_ptr % runtime->buffer_size; 18941da177e4SLinus Torvalds snd_pcm_stream_unlock_irq(substream); 18951250932eSJaroslav Kysela err = transfer(substream, appl_ofs, data, offset, frames); 18961da177e4SLinus Torvalds snd_pcm_stream_lock_irq(substream); 18971250932eSJaroslav Kysela if (err < 0) 18981250932eSJaroslav Kysela goto _end_unlock; 18991da177e4SLinus Torvalds switch (runtime->status->state) { 19001da177e4SLinus Torvalds case SNDRV_PCM_STATE_XRUN: 19011da177e4SLinus Torvalds err = -EPIPE; 19021da177e4SLinus Torvalds goto _end_unlock; 19031da177e4SLinus Torvalds case SNDRV_PCM_STATE_SUSPENDED: 19041da177e4SLinus Torvalds err = -ESTRPIPE; 19051da177e4SLinus Torvalds goto _end_unlock; 19061da177e4SLinus Torvalds default: 19071da177e4SLinus Torvalds break; 19081da177e4SLinus Torvalds } 19091da177e4SLinus Torvalds appl_ptr += frames; 19101da177e4SLinus Torvalds if (appl_ptr >= runtime->boundary) 19111da177e4SLinus Torvalds appl_ptr -= runtime->boundary; 19121da177e4SLinus Torvalds runtime->control->appl_ptr = appl_ptr; 19131da177e4SLinus Torvalds if (substream->ops->ack) 19141da177e4SLinus Torvalds substream->ops->ack(substream); 19151da177e4SLinus Torvalds 19161da177e4SLinus Torvalds offset += frames; 19171da177e4SLinus Torvalds size -= frames; 19181da177e4SLinus Torvalds xfer += frames; 19191da177e4SLinus Torvalds if (runtime->status->state == SNDRV_PCM_STATE_PREPARED && 19201da177e4SLinus Torvalds snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { 19211da177e4SLinus Torvalds err = snd_pcm_start(substream); 19221da177e4SLinus Torvalds if (err < 0) 19231da177e4SLinus Torvalds goto _end_unlock; 19241da177e4SLinus Torvalds } 19251da177e4SLinus Torvalds } 19261da177e4SLinus Torvalds _end_unlock: 1927c91a988dSJaroslav Kysela runtime->twake = 0; 19281250932eSJaroslav Kysela if (xfer > 0 && err >= 0) 19291250932eSJaroslav Kysela snd_pcm_update_state(substream, runtime); 19301da177e4SLinus Torvalds snd_pcm_stream_unlock_irq(substream); 19311da177e4SLinus Torvalds return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; 19321da177e4SLinus Torvalds } 19331da177e4SLinus Torvalds 19347eaa943cSTakashi Iwai /* sanity-check for read/write methods */ 19357eaa943cSTakashi Iwai static int pcm_sanity_check(struct snd_pcm_substream *substream) 19367eaa943cSTakashi Iwai { 19377eaa943cSTakashi Iwai struct snd_pcm_runtime *runtime; 19387eaa943cSTakashi Iwai if (PCM_RUNTIME_CHECK(substream)) 19397eaa943cSTakashi Iwai return -ENXIO; 19407eaa943cSTakashi Iwai runtime = substream->runtime; 19417eaa943cSTakashi Iwai if (snd_BUG_ON(!substream->ops->copy && !runtime->dma_area)) 19427eaa943cSTakashi Iwai return -EINVAL; 19437eaa943cSTakashi Iwai if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 19447eaa943cSTakashi Iwai return -EBADFD; 19457eaa943cSTakashi Iwai return 0; 19467eaa943cSTakashi Iwai } 19477eaa943cSTakashi Iwai 1948877211f5STakashi Iwai snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size) 19491da177e4SLinus Torvalds { 1950877211f5STakashi Iwai struct snd_pcm_runtime *runtime; 19511da177e4SLinus Torvalds int nonblock; 19527eaa943cSTakashi Iwai int err; 19531da177e4SLinus Torvalds 19547eaa943cSTakashi Iwai err = pcm_sanity_check(substream); 19557eaa943cSTakashi Iwai if (err < 0) 19567eaa943cSTakashi Iwai return err; 19571da177e4SLinus Torvalds runtime = substream->runtime; 19580df63e44STakashi Iwai nonblock = !!(substream->f_flags & O_NONBLOCK); 19591da177e4SLinus Torvalds 19601da177e4SLinus Torvalds if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && 19611da177e4SLinus Torvalds runtime->channels > 1) 19621da177e4SLinus Torvalds return -EINVAL; 19631da177e4SLinus Torvalds return snd_pcm_lib_write1(substream, (unsigned long)buf, size, nonblock, 19641da177e4SLinus Torvalds snd_pcm_lib_write_transfer); 19651da177e4SLinus Torvalds } 19661da177e4SLinus Torvalds 1967e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_lib_write); 1968e88e8ae6STakashi Iwai 1969877211f5STakashi Iwai static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream, 19701da177e4SLinus Torvalds unsigned int hwoff, 19711da177e4SLinus Torvalds unsigned long data, unsigned int off, 19721da177e4SLinus Torvalds snd_pcm_uframes_t frames) 19731da177e4SLinus Torvalds { 1974877211f5STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 19751da177e4SLinus Torvalds int err; 19761da177e4SLinus Torvalds void __user **bufs = (void __user **)data; 19771da177e4SLinus Torvalds int channels = runtime->channels; 19781da177e4SLinus Torvalds int c; 19791da177e4SLinus Torvalds if (substream->ops->copy) { 19807eaa943cSTakashi Iwai if (snd_BUG_ON(!substream->ops->silence)) 19817eaa943cSTakashi Iwai return -EINVAL; 19821da177e4SLinus Torvalds for (c = 0; c < channels; ++c, ++bufs) { 19831da177e4SLinus Torvalds if (*bufs == NULL) { 19841da177e4SLinus Torvalds if ((err = substream->ops->silence(substream, c, hwoff, frames)) < 0) 19851da177e4SLinus Torvalds return err; 19861da177e4SLinus Torvalds } else { 19871da177e4SLinus Torvalds char __user *buf = *bufs + samples_to_bytes(runtime, off); 19881da177e4SLinus Torvalds if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) 19891da177e4SLinus Torvalds return err; 19901da177e4SLinus Torvalds } 19911da177e4SLinus Torvalds } 19921da177e4SLinus Torvalds } else { 19931da177e4SLinus Torvalds /* default transfer behaviour */ 19941da177e4SLinus Torvalds size_t dma_csize = runtime->dma_bytes / channels; 19951da177e4SLinus Torvalds for (c = 0; c < channels; ++c, ++bufs) { 19961da177e4SLinus Torvalds char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); 19971da177e4SLinus Torvalds if (*bufs == NULL) { 19981da177e4SLinus Torvalds snd_pcm_format_set_silence(runtime->format, hwbuf, frames); 19991da177e4SLinus Torvalds } else { 20001da177e4SLinus Torvalds char __user *buf = *bufs + samples_to_bytes(runtime, off); 20011da177e4SLinus Torvalds if (copy_from_user(hwbuf, buf, samples_to_bytes(runtime, frames))) 20021da177e4SLinus Torvalds return -EFAULT; 20031da177e4SLinus Torvalds } 20041da177e4SLinus Torvalds } 20051da177e4SLinus Torvalds } 20061da177e4SLinus Torvalds return 0; 20071da177e4SLinus Torvalds } 20081da177e4SLinus Torvalds 2009877211f5STakashi Iwai snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, 20101da177e4SLinus Torvalds void __user **bufs, 20111da177e4SLinus Torvalds snd_pcm_uframes_t frames) 20121da177e4SLinus Torvalds { 2013877211f5STakashi Iwai struct snd_pcm_runtime *runtime; 20141da177e4SLinus Torvalds int nonblock; 20157eaa943cSTakashi Iwai int err; 20161da177e4SLinus Torvalds 20177eaa943cSTakashi Iwai err = pcm_sanity_check(substream); 20187eaa943cSTakashi Iwai if (err < 0) 20197eaa943cSTakashi Iwai return err; 20201da177e4SLinus Torvalds runtime = substream->runtime; 20210df63e44STakashi Iwai nonblock = !!(substream->f_flags & O_NONBLOCK); 20221da177e4SLinus Torvalds 20231da177e4SLinus Torvalds if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 20241da177e4SLinus Torvalds return -EINVAL; 20251da177e4SLinus Torvalds return snd_pcm_lib_write1(substream, (unsigned long)bufs, frames, 20261da177e4SLinus Torvalds nonblock, snd_pcm_lib_writev_transfer); 20271da177e4SLinus Torvalds } 20281da177e4SLinus Torvalds 2029e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_lib_writev); 2030e88e8ae6STakashi Iwai 2031877211f5STakashi Iwai static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream, 20321da177e4SLinus Torvalds unsigned int hwoff, 20331da177e4SLinus Torvalds unsigned long data, unsigned int off, 20341da177e4SLinus Torvalds snd_pcm_uframes_t frames) 20351da177e4SLinus Torvalds { 2036877211f5STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 20371da177e4SLinus Torvalds int err; 20381da177e4SLinus Torvalds char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); 20391da177e4SLinus Torvalds if (substream->ops->copy) { 20401da177e4SLinus Torvalds if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) 20411da177e4SLinus Torvalds return err; 20421da177e4SLinus Torvalds } else { 20431da177e4SLinus Torvalds char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); 20441da177e4SLinus Torvalds if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames))) 20451da177e4SLinus Torvalds return -EFAULT; 20461da177e4SLinus Torvalds } 20471da177e4SLinus Torvalds return 0; 20481da177e4SLinus Torvalds } 20491da177e4SLinus Torvalds 2050877211f5STakashi Iwai static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream, 20511da177e4SLinus Torvalds unsigned long data, 20521da177e4SLinus Torvalds snd_pcm_uframes_t size, 20531da177e4SLinus Torvalds int nonblock, 20541da177e4SLinus Torvalds transfer_f transfer) 20551da177e4SLinus Torvalds { 2056877211f5STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 20571da177e4SLinus Torvalds snd_pcm_uframes_t xfer = 0; 20581da177e4SLinus Torvalds snd_pcm_uframes_t offset = 0; 20591da177e4SLinus Torvalds int err = 0; 20601da177e4SLinus Torvalds 20611da177e4SLinus Torvalds if (size == 0) 20621da177e4SLinus Torvalds return 0; 20631da177e4SLinus Torvalds 20641da177e4SLinus Torvalds snd_pcm_stream_lock_irq(substream); 20651da177e4SLinus Torvalds switch (runtime->status->state) { 20661da177e4SLinus Torvalds case SNDRV_PCM_STATE_PREPARED: 20671da177e4SLinus Torvalds if (size >= runtime->start_threshold) { 20681da177e4SLinus Torvalds err = snd_pcm_start(substream); 20691da177e4SLinus Torvalds if (err < 0) 20701da177e4SLinus Torvalds goto _end_unlock; 20711da177e4SLinus Torvalds } 20721da177e4SLinus Torvalds break; 20731da177e4SLinus Torvalds case SNDRV_PCM_STATE_DRAINING: 20741da177e4SLinus Torvalds case SNDRV_PCM_STATE_RUNNING: 20751da177e4SLinus Torvalds case SNDRV_PCM_STATE_PAUSED: 20761da177e4SLinus Torvalds break; 20771da177e4SLinus Torvalds case SNDRV_PCM_STATE_XRUN: 20781da177e4SLinus Torvalds err = -EPIPE; 20791da177e4SLinus Torvalds goto _end_unlock; 20801da177e4SLinus Torvalds case SNDRV_PCM_STATE_SUSPENDED: 20811da177e4SLinus Torvalds err = -ESTRPIPE; 20821da177e4SLinus Torvalds goto _end_unlock; 20831da177e4SLinus Torvalds default: 20841da177e4SLinus Torvalds err = -EBADFD; 20851da177e4SLinus Torvalds goto _end_unlock; 20861da177e4SLinus Torvalds } 20871da177e4SLinus Torvalds 20885daeba34SDavid Dillow runtime->twake = runtime->control->avail_min ? : 1; 20891da177e4SLinus Torvalds while (size > 0) { 20901da177e4SLinus Torvalds snd_pcm_uframes_t frames, appl_ptr, appl_ofs; 20911da177e4SLinus Torvalds snd_pcm_uframes_t avail; 20921da177e4SLinus Torvalds snd_pcm_uframes_t cont; 209331e8960bSTakashi Iwai if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) 20941da177e4SLinus Torvalds snd_pcm_update_hw_ptr(substream); 20951da177e4SLinus Torvalds avail = snd_pcm_capture_avail(runtime); 2096d948035aSTakashi Iwai if (!avail) { 209713075510STakashi Iwai if (runtime->status->state == 209813075510STakashi Iwai SNDRV_PCM_STATE_DRAINING) { 209913075510STakashi Iwai snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 21001da177e4SLinus Torvalds goto _end_unlock; 21011da177e4SLinus Torvalds } 21021da177e4SLinus Torvalds if (nonblock) { 21031da177e4SLinus Torvalds err = -EAGAIN; 21041da177e4SLinus Torvalds goto _end_unlock; 21051da177e4SLinus Torvalds } 21065daeba34SDavid Dillow runtime->twake = min_t(snd_pcm_uframes_t, size, 21075daeba34SDavid Dillow runtime->control->avail_min ? : 1); 21085daeba34SDavid Dillow err = wait_for_avail(substream, &avail); 210913075510STakashi Iwai if (err < 0) 21101da177e4SLinus Torvalds goto _end_unlock; 211113075510STakashi Iwai if (!avail) 211213075510STakashi Iwai continue; /* draining */ 21131da177e4SLinus Torvalds } 21141da177e4SLinus Torvalds frames = size > avail ? avail : size; 21151da177e4SLinus Torvalds cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; 21161da177e4SLinus Torvalds if (frames > cont) 21171da177e4SLinus Torvalds frames = cont; 21187eaa943cSTakashi Iwai if (snd_BUG_ON(!frames)) { 2119c91a988dSJaroslav Kysela runtime->twake = 0; 21207eaa943cSTakashi Iwai snd_pcm_stream_unlock_irq(substream); 21217eaa943cSTakashi Iwai return -EINVAL; 21227eaa943cSTakashi Iwai } 21231da177e4SLinus Torvalds appl_ptr = runtime->control->appl_ptr; 21241da177e4SLinus Torvalds appl_ofs = appl_ptr % runtime->buffer_size; 21251da177e4SLinus Torvalds snd_pcm_stream_unlock_irq(substream); 21261250932eSJaroslav Kysela err = transfer(substream, appl_ofs, data, offset, frames); 21271da177e4SLinus Torvalds snd_pcm_stream_lock_irq(substream); 21281250932eSJaroslav Kysela if (err < 0) 21291250932eSJaroslav Kysela goto _end_unlock; 21301da177e4SLinus Torvalds switch (runtime->status->state) { 21311da177e4SLinus Torvalds case SNDRV_PCM_STATE_XRUN: 21321da177e4SLinus Torvalds err = -EPIPE; 21331da177e4SLinus Torvalds goto _end_unlock; 21341da177e4SLinus Torvalds case SNDRV_PCM_STATE_SUSPENDED: 21351da177e4SLinus Torvalds err = -ESTRPIPE; 21361da177e4SLinus Torvalds goto _end_unlock; 21371da177e4SLinus Torvalds default: 21381da177e4SLinus Torvalds break; 21391da177e4SLinus Torvalds } 21401da177e4SLinus Torvalds appl_ptr += frames; 21411da177e4SLinus Torvalds if (appl_ptr >= runtime->boundary) 21421da177e4SLinus Torvalds appl_ptr -= runtime->boundary; 21431da177e4SLinus Torvalds runtime->control->appl_ptr = appl_ptr; 21441da177e4SLinus Torvalds if (substream->ops->ack) 21451da177e4SLinus Torvalds substream->ops->ack(substream); 21461da177e4SLinus Torvalds 21471da177e4SLinus Torvalds offset += frames; 21481da177e4SLinus Torvalds size -= frames; 21491da177e4SLinus Torvalds xfer += frames; 21501da177e4SLinus Torvalds } 21511da177e4SLinus Torvalds _end_unlock: 2152c91a988dSJaroslav Kysela runtime->twake = 0; 21531250932eSJaroslav Kysela if (xfer > 0 && err >= 0) 21541250932eSJaroslav Kysela snd_pcm_update_state(substream, runtime); 21551da177e4SLinus Torvalds snd_pcm_stream_unlock_irq(substream); 21561da177e4SLinus Torvalds return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; 21571da177e4SLinus Torvalds } 21581da177e4SLinus Torvalds 2159877211f5STakashi Iwai snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __user *buf, snd_pcm_uframes_t size) 21601da177e4SLinus Torvalds { 2161877211f5STakashi Iwai struct snd_pcm_runtime *runtime; 21621da177e4SLinus Torvalds int nonblock; 21637eaa943cSTakashi Iwai int err; 21641da177e4SLinus Torvalds 21657eaa943cSTakashi Iwai err = pcm_sanity_check(substream); 21667eaa943cSTakashi Iwai if (err < 0) 21677eaa943cSTakashi Iwai return err; 21681da177e4SLinus Torvalds runtime = substream->runtime; 21690df63e44STakashi Iwai nonblock = !!(substream->f_flags & O_NONBLOCK); 21701da177e4SLinus Torvalds if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED) 21711da177e4SLinus Torvalds return -EINVAL; 21721da177e4SLinus Torvalds return snd_pcm_lib_read1(substream, (unsigned long)buf, size, nonblock, snd_pcm_lib_read_transfer); 21731da177e4SLinus Torvalds } 21741da177e4SLinus Torvalds 2175e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_lib_read); 2176e88e8ae6STakashi Iwai 2177877211f5STakashi Iwai static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream, 21781da177e4SLinus Torvalds unsigned int hwoff, 21791da177e4SLinus Torvalds unsigned long data, unsigned int off, 21801da177e4SLinus Torvalds snd_pcm_uframes_t frames) 21811da177e4SLinus Torvalds { 2182877211f5STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 21831da177e4SLinus Torvalds int err; 21841da177e4SLinus Torvalds void __user **bufs = (void __user **)data; 21851da177e4SLinus Torvalds int channels = runtime->channels; 21861da177e4SLinus Torvalds int c; 21871da177e4SLinus Torvalds if (substream->ops->copy) { 21881da177e4SLinus Torvalds for (c = 0; c < channels; ++c, ++bufs) { 21891da177e4SLinus Torvalds char __user *buf; 21901da177e4SLinus Torvalds if (*bufs == NULL) 21911da177e4SLinus Torvalds continue; 21921da177e4SLinus Torvalds buf = *bufs + samples_to_bytes(runtime, off); 21931da177e4SLinus Torvalds if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) 21941da177e4SLinus Torvalds return err; 21951da177e4SLinus Torvalds } 21961da177e4SLinus Torvalds } else { 21971da177e4SLinus Torvalds snd_pcm_uframes_t dma_csize = runtime->dma_bytes / channels; 21981da177e4SLinus Torvalds for (c = 0; c < channels; ++c, ++bufs) { 21991da177e4SLinus Torvalds char *hwbuf; 22001da177e4SLinus Torvalds char __user *buf; 22011da177e4SLinus Torvalds if (*bufs == NULL) 22021da177e4SLinus Torvalds continue; 22031da177e4SLinus Torvalds 22041da177e4SLinus Torvalds hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); 22051da177e4SLinus Torvalds buf = *bufs + samples_to_bytes(runtime, off); 22061da177e4SLinus Torvalds if (copy_to_user(buf, hwbuf, samples_to_bytes(runtime, frames))) 22071da177e4SLinus Torvalds return -EFAULT; 22081da177e4SLinus Torvalds } 22091da177e4SLinus Torvalds } 22101da177e4SLinus Torvalds return 0; 22111da177e4SLinus Torvalds } 22121da177e4SLinus Torvalds 2213877211f5STakashi Iwai snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, 22141da177e4SLinus Torvalds void __user **bufs, 22151da177e4SLinus Torvalds snd_pcm_uframes_t frames) 22161da177e4SLinus Torvalds { 2217877211f5STakashi Iwai struct snd_pcm_runtime *runtime; 22181da177e4SLinus Torvalds int nonblock; 22197eaa943cSTakashi Iwai int err; 22201da177e4SLinus Torvalds 22217eaa943cSTakashi Iwai err = pcm_sanity_check(substream); 22227eaa943cSTakashi Iwai if (err < 0) 22237eaa943cSTakashi Iwai return err; 22241da177e4SLinus Torvalds runtime = substream->runtime; 22251da177e4SLinus Torvalds if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 22261da177e4SLinus Torvalds return -EBADFD; 22271da177e4SLinus Torvalds 22280df63e44STakashi Iwai nonblock = !!(substream->f_flags & O_NONBLOCK); 22291da177e4SLinus Torvalds if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 22301da177e4SLinus Torvalds return -EINVAL; 22311da177e4SLinus Torvalds return snd_pcm_lib_read1(substream, (unsigned long)bufs, frames, nonblock, snd_pcm_lib_readv_transfer); 22321da177e4SLinus Torvalds } 22331da177e4SLinus Torvalds 22341da177e4SLinus Torvalds EXPORT_SYMBOL(snd_pcm_lib_readv); 2235