Thomas Gleixner | 1a59d1b8 | 2019-05-27 08:55:05 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
| 3 | * Digital Audio (PCM) abstract layer |
Jaroslav Kysela | c1017a4 | 2007-10-15 09:50:19 +0200 | [diff] [blame] | 4 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | */ |
| 6 | |
Arnd Bergmann | 09d9417 | 2018-04-24 20:06:14 +0800 | [diff] [blame] | 7 | #include <linux/compat.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | #include <linux/mm.h> |
Paul Gortmaker | da155d5 | 2011-07-15 12:38:28 -0400 | [diff] [blame] | 9 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | #include <linux/file.h> |
| 11 | #include <linux/slab.h> |
Ingo Molnar | 174cd4b | 2017-02-02 19:15:33 +0100 | [diff] [blame] | 12 | #include <linux/sched/signal.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/time.h> |
Jean Pihet | e8db0be | 2011-08-25 15:35:03 +0200 | [diff] [blame] | 14 | #include <linux/pm_qos.h> |
Takashi Iwai | 6cbbfe1 | 2015-01-28 16:49:33 +0100 | [diff] [blame] | 15 | #include <linux/io.h> |
Takashi Iwai | 657b198 | 2009-11-26 12:40:21 +0100 | [diff] [blame] | 16 | #include <linux/dma-mapping.h> |
Takashi Iwai | 7e8edae | 2019-11-05 09:01:37 +0100 | [diff] [blame] | 17 | #include <linux/vmalloc.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <sound/core.h> |
| 19 | #include <sound/control.h> |
| 20 | #include <sound/info.h> |
| 21 | #include <sound/pcm.h> |
| 22 | #include <sound/pcm_params.h> |
| 23 | #include <sound/timer.h> |
| 24 | #include <sound/minors.h> |
Christoph Hellwig | e2e40f2 | 2015-02-22 08:58:50 -0800 | [diff] [blame] | 25 | #include <linux/uio.h> |
Chanho Min | b888a5f7 | 2018-11-26 14:36:37 +0900 | [diff] [blame] | 26 | #include <linux/delay.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | |
Takashi Sakamoto | 2c4842d | 2017-05-26 09:30:46 +0900 | [diff] [blame] | 28 | #include "pcm_local.h" |
| 29 | |
Takashi Sakamoto | 37567c5 | 2017-06-07 08:46:44 +0900 | [diff] [blame] | 30 | #ifdef CONFIG_SND_DEBUG |
Takashi Sakamoto | be4e31d | 2017-06-07 08:46:43 +0900 | [diff] [blame] | 31 | #define CREATE_TRACE_POINTS |
| 32 | #include "pcm_param_trace.h" |
Takashi Sakamoto | 37567c5 | 2017-06-07 08:46:44 +0900 | [diff] [blame] | 33 | #else |
| 34 | #define trace_hw_mask_param_enabled() 0 |
| 35 | #define trace_hw_interval_param_enabled() 0 |
| 36 | #define trace_hw_mask_param(substream, type, index, prev, curr) |
| 37 | #define trace_hw_interval_param(substream, type, index, prev, curr) |
| 38 | #endif |
Takashi Sakamoto | be4e31d | 2017-06-07 08:46:43 +0900 | [diff] [blame] | 39 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | /* |
| 41 | * Compatibility |
| 42 | */ |
| 43 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 44 | struct snd_pcm_hw_params_old { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | unsigned int flags; |
| 46 | unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - |
| 47 | SNDRV_PCM_HW_PARAM_ACCESS + 1]; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 48 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; |
| 50 | unsigned int rmask; |
| 51 | unsigned int cmask; |
| 52 | unsigned int info; |
| 53 | unsigned int msbits; |
| 54 | unsigned int rate_num; |
| 55 | unsigned int rate_den; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 56 | snd_pcm_uframes_t fifo_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | unsigned char reserved[64]; |
| 58 | }; |
| 59 | |
Takashi Iwai | 59d4858 | 2005-12-01 10:51:58 +0100 | [diff] [blame] | 60 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 61 | #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old) |
| 62 | #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 64 | static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, |
| 65 | struct snd_pcm_hw_params_old __user * _oparams); |
| 66 | static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, |
| 67 | struct snd_pcm_hw_params_old __user * _oparams); |
Takashi Iwai | 59d4858 | 2005-12-01 10:51:58 +0100 | [diff] [blame] | 68 | #endif |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 69 | static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | |
| 71 | /* |
| 72 | * |
| 73 | */ |
| 74 | |
Takashi Iwai | 7af142f | 2014-09-01 11:19:37 +0200 | [diff] [blame] | 75 | static DECLARE_RWSEM(snd_pcm_link_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
Takashi Iwai | 73365cb | 2019-01-13 09:35:17 +0100 | [diff] [blame] | 77 | void snd_pcm_group_init(struct snd_pcm_group *group) |
Takashi Iwai | 67ec1072 | 2016-02-17 14:30:26 +0100 | [diff] [blame] | 78 | { |
Takashi Iwai | 73365cb | 2019-01-13 09:35:17 +0100 | [diff] [blame] | 79 | spin_lock_init(&group->lock); |
| 80 | mutex_init(&group->mutex); |
| 81 | INIT_LIST_HEAD(&group->substreams); |
Takashi Iwai | 0e279dc | 2019-07-19 10:55:05 +0200 | [diff] [blame] | 82 | refcount_set(&group->refs, 1); |
Takashi Iwai | 67ec1072 | 2016-02-17 14:30:26 +0100 | [diff] [blame] | 83 | } |
| 84 | |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 85 | /* define group lock helpers */ |
| 86 | #define DEFINE_PCM_GROUP_LOCK(action, mutex_action) \ |
| 87 | static void snd_pcm_group_ ## action(struct snd_pcm_group *group, bool nonatomic) \ |
| 88 | { \ |
| 89 | if (nonatomic) \ |
| 90 | mutex_ ## mutex_action(&group->mutex); \ |
| 91 | else \ |
| 92 | spin_ ## action(&group->lock); \ |
Anna-Maria Gleixner | 10aa7ca | 2018-05-04 17:28:10 +0200 | [diff] [blame] | 93 | } |
| 94 | |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 95 | DEFINE_PCM_GROUP_LOCK(lock, lock); |
| 96 | DEFINE_PCM_GROUP_LOCK(unlock, unlock); |
| 97 | DEFINE_PCM_GROUP_LOCK(lock_irq, lock); |
| 98 | DEFINE_PCM_GROUP_LOCK(unlock_irq, unlock); |
Anna-Maria Gleixner | 10aa7ca | 2018-05-04 17:28:10 +0200 | [diff] [blame] | 99 | |
Takashi Iwai | 30b771c | 2014-10-30 15:02:50 +0100 | [diff] [blame] | 100 | /** |
| 101 | * snd_pcm_stream_lock - Lock the PCM stream |
| 102 | * @substream: PCM substream |
| 103 | * |
| 104 | * This locks the PCM stream's spinlock or mutex depending on the nonatomic |
| 105 | * flag of the given substream. This also takes the global link rw lock |
| 106 | * (or rw sem), too, for avoiding the race with linked streams. |
| 107 | */ |
Takashi Iwai | 7af142f | 2014-09-01 11:19:37 +0200 | [diff] [blame] | 108 | void snd_pcm_stream_lock(struct snd_pcm_substream *substream) |
| 109 | { |
Takashi Iwai | ef2056b | 2019-01-13 10:15:03 +0100 | [diff] [blame] | 110 | snd_pcm_group_lock(&substream->self_group, substream->pcm->nonatomic); |
Takashi Iwai | 7af142f | 2014-09-01 11:19:37 +0200 | [diff] [blame] | 111 | } |
| 112 | EXPORT_SYMBOL_GPL(snd_pcm_stream_lock); |
| 113 | |
Takashi Iwai | 30b771c | 2014-10-30 15:02:50 +0100 | [diff] [blame] | 114 | /** |
Mauro Carvalho Chehab | f7b6603 | 2020-10-23 18:33:35 +0200 | [diff] [blame] | 115 | * snd_pcm_stream_unlock - Unlock the PCM stream |
Takashi Iwai | 30b771c | 2014-10-30 15:02:50 +0100 | [diff] [blame] | 116 | * @substream: PCM substream |
| 117 | * |
| 118 | * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock(). |
| 119 | */ |
Takashi Iwai | 7af142f | 2014-09-01 11:19:37 +0200 | [diff] [blame] | 120 | void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) |
| 121 | { |
Takashi Iwai | ef2056b | 2019-01-13 10:15:03 +0100 | [diff] [blame] | 122 | snd_pcm_group_unlock(&substream->self_group, substream->pcm->nonatomic); |
Takashi Iwai | 7af142f | 2014-09-01 11:19:37 +0200 | [diff] [blame] | 123 | } |
| 124 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock); |
| 125 | |
Takashi Iwai | 30b771c | 2014-10-30 15:02:50 +0100 | [diff] [blame] | 126 | /** |
| 127 | * snd_pcm_stream_lock_irq - Lock the PCM stream |
| 128 | * @substream: PCM substream |
| 129 | * |
| 130 | * This locks the PCM stream like snd_pcm_stream_lock() and disables the local |
| 131 | * IRQ (only when nonatomic is false). In nonatomic case, this is identical |
| 132 | * as snd_pcm_stream_lock(). |
| 133 | */ |
Takashi Iwai | 7af142f | 2014-09-01 11:19:37 +0200 | [diff] [blame] | 134 | void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) |
| 135 | { |
Takashi Iwai | ef2056b | 2019-01-13 10:15:03 +0100 | [diff] [blame] | 136 | snd_pcm_group_lock_irq(&substream->self_group, |
| 137 | substream->pcm->nonatomic); |
Takashi Iwai | 7af142f | 2014-09-01 11:19:37 +0200 | [diff] [blame] | 138 | } |
| 139 | EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq); |
| 140 | |
Michał Mirosław | e18035c | 2020-06-08 12:06:32 +0200 | [diff] [blame] | 141 | static void snd_pcm_stream_lock_nested(struct snd_pcm_substream *substream) |
| 142 | { |
| 143 | struct snd_pcm_group *group = &substream->self_group; |
| 144 | |
| 145 | if (substream->pcm->nonatomic) |
| 146 | mutex_lock_nested(&group->mutex, SINGLE_DEPTH_NESTING); |
| 147 | else |
| 148 | spin_lock_nested(&group->lock, SINGLE_DEPTH_NESTING); |
| 149 | } |
| 150 | |
Takashi Iwai | 30b771c | 2014-10-30 15:02:50 +0100 | [diff] [blame] | 151 | /** |
| 152 | * snd_pcm_stream_unlock_irq - Unlock the PCM stream |
| 153 | * @substream: PCM substream |
| 154 | * |
| 155 | * This is a counter-part of snd_pcm_stream_lock_irq(). |
| 156 | */ |
Takashi Iwai | 7af142f | 2014-09-01 11:19:37 +0200 | [diff] [blame] | 157 | void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) |
| 158 | { |
Takashi Iwai | ef2056b | 2019-01-13 10:15:03 +0100 | [diff] [blame] | 159 | snd_pcm_group_unlock_irq(&substream->self_group, |
| 160 | substream->pcm->nonatomic); |
Takashi Iwai | 7af142f | 2014-09-01 11:19:37 +0200 | [diff] [blame] | 161 | } |
| 162 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq); |
| 163 | |
| 164 | unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream) |
| 165 | { |
Takashi Iwai | ef2056b | 2019-01-13 10:15:03 +0100 | [diff] [blame] | 166 | unsigned long flags = 0; |
| 167 | if (substream->pcm->nonatomic) |
| 168 | mutex_lock(&substream->self_group.mutex); |
| 169 | else |
| 170 | spin_lock_irqsave(&substream->self_group.lock, flags); |
| 171 | return flags; |
Takashi Iwai | 7af142f | 2014-09-01 11:19:37 +0200 | [diff] [blame] | 172 | } |
| 173 | EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave); |
| 174 | |
Takashi Iwai | 30b771c | 2014-10-30 15:02:50 +0100 | [diff] [blame] | 175 | /** |
| 176 | * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream |
| 177 | * @substream: PCM substream |
| 178 | * @flags: irq flags |
| 179 | * |
| 180 | * This is a counter-part of snd_pcm_stream_lock_irqsave(). |
| 181 | */ |
Takashi Iwai | 7af142f | 2014-09-01 11:19:37 +0200 | [diff] [blame] | 182 | void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, |
| 183 | unsigned long flags) |
| 184 | { |
Takashi Iwai | ef2056b | 2019-01-13 10:15:03 +0100 | [diff] [blame] | 185 | if (substream->pcm->nonatomic) |
| 186 | mutex_unlock(&substream->self_group.mutex); |
| 187 | else |
| 188 | spin_unlock_irqrestore(&substream->self_group.lock, flags); |
Takashi Iwai | 7af142f | 2014-09-01 11:19:37 +0200 | [diff] [blame] | 189 | } |
| 190 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | |
Takashi Iwai | fc033cb | 2019-11-17 09:53:03 +0100 | [diff] [blame] | 192 | /* Run PCM ioctl ops */ |
| 193 | static int snd_pcm_ops_ioctl(struct snd_pcm_substream *substream, |
| 194 | unsigned cmd, void *arg) |
| 195 | { |
| 196 | if (substream->ops->ioctl) |
| 197 | return substream->ops->ioctl(substream, cmd, arg); |
| 198 | else |
| 199 | return snd_pcm_lib_ioctl(substream, cmd, arg); |
| 200 | } |
| 201 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 202 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 204 | struct snd_pcm *pcm = substream->pcm; |
| 205 | struct snd_pcm_str *pstr = substream->pstr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | memset(info, 0, sizeof(*info)); |
| 208 | info->card = pcm->card->number; |
| 209 | info->device = pcm->device; |
| 210 | info->stream = substream->stream; |
| 211 | info->subdevice = substream->number; |
Joe Perches | 75b1a8f | 2021-01-04 09:17:34 -0800 | [diff] [blame] | 212 | strscpy(info->id, pcm->id, sizeof(info->id)); |
| 213 | strscpy(info->name, pcm->name, sizeof(info->name)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | info->dev_class = pcm->dev_class; |
| 215 | info->dev_subclass = pcm->dev_subclass; |
| 216 | info->subdevices_count = pstr->substream_count; |
| 217 | info->subdevices_avail = pstr->substream_count - pstr->substream_opened; |
Joe Perches | 75b1a8f | 2021-01-04 09:17:34 -0800 | [diff] [blame] | 218 | strscpy(info->subname, substream->name, sizeof(info->subname)); |
Takashi Sakamoto | e11f0f9 | 2017-06-14 19:30:03 +0900 | [diff] [blame] | 219 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | return 0; |
| 221 | } |
| 222 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 223 | int snd_pcm_info_user(struct snd_pcm_substream *substream, |
| 224 | struct snd_pcm_info __user * _info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 226 | struct snd_pcm_info *info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | int err; |
| 228 | |
| 229 | info = kmalloc(sizeof(*info), GFP_KERNEL); |
| 230 | if (! info) |
| 231 | return -ENOMEM; |
| 232 | err = snd_pcm_info(substream, info); |
| 233 | if (err >= 0) { |
| 234 | if (copy_to_user(_info, info, sizeof(*info))) |
| 235 | err = -EFAULT; |
| 236 | } |
| 237 | kfree(info); |
| 238 | return err; |
| 239 | } |
| 240 | |
Takashi Iwai | f9b0c05 | 2020-02-06 17:39:43 +0100 | [diff] [blame] | 241 | /* macro for simplified cast */ |
| 242 | #define PARAM_MASK_BIT(b) (1U << (__force int)(b)) |
| 243 | |
Takashi Iwai | 63825f3 | 2014-10-22 12:04:46 +0200 | [diff] [blame] | 244 | static bool hw_support_mmap(struct snd_pcm_substream *substream) |
| 245 | { |
| 246 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP)) |
| 247 | return false; |
Christoph Hellwig | 425da15 | 2019-08-03 13:31:59 +0300 | [diff] [blame] | 248 | |
| 249 | if (substream->ops->mmap || |
Takashi Iwai | 6111fd2 | 2019-11-04 11:11:15 +0100 | [diff] [blame] | 250 | (substream->dma_buffer.dev.type != SNDRV_DMA_TYPE_DEV && |
| 251 | substream->dma_buffer.dev.type != SNDRV_DMA_TYPE_DEV_UC)) |
Christoph Hellwig | 425da15 | 2019-08-03 13:31:59 +0300 | [diff] [blame] | 252 | return true; |
| 253 | |
| 254 | return dma_can_mmap(substream->dma_buffer.dev.dev); |
Takashi Iwai | 63825f3 | 2014-10-22 12:04:46 +0200 | [diff] [blame] | 255 | } |
| 256 | |
Takashi Sakamoto | 561e1ca | 2017-06-09 06:36:59 +0900 | [diff] [blame] | 257 | static int constrain_mask_params(struct snd_pcm_substream *substream, |
| 258 | struct snd_pcm_hw_params *params) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | { |
Takashi Sakamoto | 561e1ca | 2017-06-09 06:36:59 +0900 | [diff] [blame] | 260 | struct snd_pcm_hw_constraints *constrs = |
| 261 | &substream->runtime->hw_constraints; |
| 262 | struct snd_mask *m; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | unsigned int k; |
Takashi Sakamoto | 561e1ca | 2017-06-09 06:36:59 +0900 | [diff] [blame] | 264 | struct snd_mask old_mask; |
| 265 | int changed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | |
| 267 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { |
| 268 | m = hw_param_mask(params, k); |
| 269 | if (snd_mask_empty(m)) |
| 270 | return -EINVAL; |
Takashi Sakamoto | d81052f | 2017-06-09 06:37:06 +0900 | [diff] [blame] | 271 | |
| 272 | /* This parameter is not requested to change by a caller. */ |
Takashi Iwai | f9b0c05 | 2020-02-06 17:39:43 +0100 | [diff] [blame] | 273 | if (!(params->rmask & PARAM_MASK_BIT(k))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | continue; |
Takashi Sakamoto | be4e31d | 2017-06-07 08:46:43 +0900 | [diff] [blame] | 275 | |
| 276 | if (trace_hw_mask_param_enabled()) |
| 277 | old_mask = *m; |
Takashi Sakamoto | c6706de | 2017-06-07 08:46:45 +0900 | [diff] [blame] | 278 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | changed = snd_mask_refine(m, constrs_mask(constrs, k)); |
Takashi Sakamoto | f74ae15 | 2017-06-11 23:56:12 +0900 | [diff] [blame] | 280 | if (changed < 0) |
| 281 | return changed; |
Takashi Sakamoto | 82e7d50 | 2017-06-11 23:56:13 +0900 | [diff] [blame] | 282 | if (changed == 0) |
| 283 | continue; |
Takashi Sakamoto | be4e31d | 2017-06-07 08:46:43 +0900 | [diff] [blame] | 284 | |
Takashi Sakamoto | d81052f | 2017-06-09 06:37:06 +0900 | [diff] [blame] | 285 | /* Set corresponding flag so that the caller gets it. */ |
Takashi Sakamoto | 82e7d50 | 2017-06-11 23:56:13 +0900 | [diff] [blame] | 286 | trace_hw_mask_param(substream, k, 0, &old_mask, m); |
Takashi Iwai | f9b0c05 | 2020-02-06 17:39:43 +0100 | [diff] [blame] | 287 | params->cmask |= PARAM_MASK_BIT(k); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | } |
| 289 | |
Takashi Sakamoto | 561e1ca | 2017-06-09 06:36:59 +0900 | [diff] [blame] | 290 | return 0; |
| 291 | } |
| 292 | |
Takashi Sakamoto | 3432fa0 | 2017-06-09 06:37:00 +0900 | [diff] [blame] | 293 | static int constrain_interval_params(struct snd_pcm_substream *substream, |
| 294 | struct snd_pcm_hw_params *params) |
| 295 | { |
| 296 | struct snd_pcm_hw_constraints *constrs = |
| 297 | &substream->runtime->hw_constraints; |
| 298 | struct snd_interval *i; |
| 299 | unsigned int k; |
| 300 | struct snd_interval old_interval; |
| 301 | int changed; |
| 302 | |
| 303 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { |
| 304 | i = hw_param_interval(params, k); |
| 305 | if (snd_interval_empty(i)) |
| 306 | return -EINVAL; |
Takashi Sakamoto | d81052f | 2017-06-09 06:37:06 +0900 | [diff] [blame] | 307 | |
| 308 | /* This parameter is not requested to change by a caller. */ |
Takashi Iwai | f9b0c05 | 2020-02-06 17:39:43 +0100 | [diff] [blame] | 309 | if (!(params->rmask & PARAM_MASK_BIT(k))) |
Takashi Sakamoto | 3432fa0 | 2017-06-09 06:37:00 +0900 | [diff] [blame] | 310 | continue; |
| 311 | |
| 312 | if (trace_hw_interval_param_enabled()) |
| 313 | old_interval = *i; |
| 314 | |
| 315 | changed = snd_interval_refine(i, constrs_interval(constrs, k)); |
Takashi Sakamoto | f74ae15 | 2017-06-11 23:56:12 +0900 | [diff] [blame] | 316 | if (changed < 0) |
| 317 | return changed; |
Takashi Sakamoto | 82e7d50 | 2017-06-11 23:56:13 +0900 | [diff] [blame] | 318 | if (changed == 0) |
| 319 | continue; |
Takashi Sakamoto | 3432fa0 | 2017-06-09 06:37:00 +0900 | [diff] [blame] | 320 | |
Takashi Sakamoto | d81052f | 2017-06-09 06:37:06 +0900 | [diff] [blame] | 321 | /* Set corresponding flag so that the caller gets it. */ |
Takashi Sakamoto | 82e7d50 | 2017-06-11 23:56:13 +0900 | [diff] [blame] | 322 | trace_hw_interval_param(substream, k, 0, &old_interval, i); |
Takashi Iwai | f9b0c05 | 2020-02-06 17:39:43 +0100 | [diff] [blame] | 323 | params->cmask |= PARAM_MASK_BIT(k); |
Takashi Sakamoto | 3432fa0 | 2017-06-09 06:37:00 +0900 | [diff] [blame] | 324 | } |
| 325 | |
| 326 | return 0; |
| 327 | } |
| 328 | |
Takashi Sakamoto | 9cc07f5 | 2017-06-09 06:37:01 +0900 | [diff] [blame] | 329 | static int constrain_params_by_rules(struct snd_pcm_substream *substream, |
| 330 | struct snd_pcm_hw_params *params) |
Takashi Sakamoto | 561e1ca | 2017-06-09 06:36:59 +0900 | [diff] [blame] | 331 | { |
Takashi Sakamoto | 9cc07f5 | 2017-06-09 06:37:01 +0900 | [diff] [blame] | 332 | struct snd_pcm_hw_constraints *constrs = |
| 333 | &substream->runtime->hw_constraints; |
Takashi Sakamoto | 561e1ca | 2017-06-09 06:36:59 +0900 | [diff] [blame] | 334 | unsigned int k; |
Takashi Iwai | 5730f9f | 2018-03-13 11:18:57 +0100 | [diff] [blame] | 335 | unsigned int *rstamps; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; |
Takashi Sakamoto | d81052f | 2017-06-09 06:37:06 +0900 | [diff] [blame] | 337 | unsigned int stamp; |
Takashi Sakamoto | a1c06e3 | 2017-06-09 06:37:04 +0900 | [diff] [blame] | 338 | struct snd_pcm_hw_rule *r; |
| 339 | unsigned int d; |
Takashi Sakamoto | 9cc07f5 | 2017-06-09 06:37:01 +0900 | [diff] [blame] | 340 | struct snd_mask old_mask; |
| 341 | struct snd_interval old_interval; |
Takashi Sakamoto | a1c06e3 | 2017-06-09 06:37:04 +0900 | [diff] [blame] | 342 | bool again; |
Takashi Iwai | 5730f9f | 2018-03-13 11:18:57 +0100 | [diff] [blame] | 343 | int changed, err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | |
Takashi Sakamoto | d81052f | 2017-06-09 06:37:06 +0900 | [diff] [blame] | 345 | /* |
| 346 | * Each application of rule has own sequence number. |
| 347 | * |
| 348 | * Each member of 'rstamps' array represents the sequence number of |
| 349 | * recent application of corresponding rule. |
| 350 | */ |
Takashi Iwai | 5730f9f | 2018-03-13 11:18:57 +0100 | [diff] [blame] | 351 | rstamps = kcalloc(constrs->rules_num, sizeof(unsigned int), GFP_KERNEL); |
| 352 | if (!rstamps) |
| 353 | return -ENOMEM; |
Takashi Sakamoto | d81052f | 2017-06-09 06:37:06 +0900 | [diff] [blame] | 354 | |
| 355 | /* |
| 356 | * Each member of 'vstamps' array represents the sequence number of |
| 357 | * recent application of rule in which corresponding parameters were |
| 358 | * changed. |
| 359 | * |
| 360 | * In initial state, elements corresponding to parameters requested by |
| 361 | * a caller is 1. For unrequested parameters, corresponding members |
| 362 | * have 0 so that the parameters are never changed anymore. |
| 363 | */ |
Takashi Sakamoto | 9cc07f5 | 2017-06-09 06:37:01 +0900 | [diff] [blame] | 364 | for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) |
Takashi Iwai | f9b0c05 | 2020-02-06 17:39:43 +0100 | [diff] [blame] | 365 | vstamps[k] = (params->rmask & PARAM_MASK_BIT(k)) ? 1 : 0; |
Takashi Sakamoto | d81052f | 2017-06-09 06:37:06 +0900 | [diff] [blame] | 366 | |
| 367 | /* Due to the above design, actual sequence number starts at 2. */ |
| 368 | stamp = 2; |
Takashi Sakamoto | 0d4e399 | 2017-06-09 06:37:02 +0900 | [diff] [blame] | 369 | retry: |
Takashi Sakamoto | d81052f | 2017-06-09 06:37:06 +0900 | [diff] [blame] | 370 | /* Apply all rules in order. */ |
Takashi Sakamoto | a1c06e3 | 2017-06-09 06:37:04 +0900 | [diff] [blame] | 371 | again = false; |
Takashi Sakamoto | 0d4e399 | 2017-06-09 06:37:02 +0900 | [diff] [blame] | 372 | for (k = 0; k < constrs->rules_num; k++) { |
Takashi Sakamoto | a1c06e3 | 2017-06-09 06:37:04 +0900 | [diff] [blame] | 373 | r = &constrs->rules[k]; |
Takashi Sakamoto | d81052f | 2017-06-09 06:37:06 +0900 | [diff] [blame] | 374 | |
| 375 | /* |
| 376 | * Check condition bits of this rule. When the rule has |
| 377 | * some condition bits, parameter without the bits is |
| 378 | * never processed. SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP |
| 379 | * is an example of the condition bits. |
| 380 | */ |
Takashi Sakamoto | 0d4e399 | 2017-06-09 06:37:02 +0900 | [diff] [blame] | 381 | if (r->cond && !(r->cond & params->flags)) |
| 382 | continue; |
Takashi Sakamoto | d81052f | 2017-06-09 06:37:06 +0900 | [diff] [blame] | 383 | |
| 384 | /* |
Takashi Iwai | 23b53d4 | 2021-01-23 16:57:30 +0100 | [diff] [blame] | 385 | * The 'deps' array includes maximum four dependencies |
| 386 | * to SNDRV_PCM_HW_PARAM_XXXs for this rule. The fifth |
Takashi Sakamoto | d81052f | 2017-06-09 06:37:06 +0900 | [diff] [blame] | 387 | * member of this array is a sentinel and should be |
| 388 | * negative value. |
| 389 | * |
| 390 | * This rule should be processed in this time when dependent |
| 391 | * parameters were changed at former applications of the other |
| 392 | * rules. |
| 393 | */ |
Takashi Sakamoto | 0d4e399 | 2017-06-09 06:37:02 +0900 | [diff] [blame] | 394 | for (d = 0; r->deps[d] >= 0; d++) { |
Takashi Sakamoto | d656b4a | 2017-06-09 06:37:03 +0900 | [diff] [blame] | 395 | if (vstamps[r->deps[d]] > rstamps[k]) |
Takashi Sakamoto | 0d4e399 | 2017-06-09 06:37:02 +0900 | [diff] [blame] | 396 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | } |
Takashi Sakamoto | d656b4a | 2017-06-09 06:37:03 +0900 | [diff] [blame] | 398 | if (r->deps[d] < 0) |
Takashi Sakamoto | 0d4e399 | 2017-06-09 06:37:02 +0900 | [diff] [blame] | 399 | continue; |
| 400 | |
| 401 | if (trace_hw_mask_param_enabled()) { |
| 402 | if (hw_is_mask(r->var)) |
| 403 | old_mask = *hw_param_mask(params, r->var); |
| 404 | } |
| 405 | if (trace_hw_interval_param_enabled()) { |
| 406 | if (hw_is_interval(r->var)) |
| 407 | old_interval = *hw_param_interval(params, r->var); |
| 408 | } |
| 409 | |
| 410 | changed = r->func(params, r); |
Takashi Iwai | 5730f9f | 2018-03-13 11:18:57 +0100 | [diff] [blame] | 411 | if (changed < 0) { |
| 412 | err = changed; |
| 413 | goto out; |
| 414 | } |
Takashi Sakamoto | 0d4e399 | 2017-06-09 06:37:02 +0900 | [diff] [blame] | 415 | |
Takashi Sakamoto | d81052f | 2017-06-09 06:37:06 +0900 | [diff] [blame] | 416 | /* |
Takashi Sakamoto | 82e7d50 | 2017-06-11 23:56:13 +0900 | [diff] [blame] | 417 | * When the parameter is changed, notify it to the caller |
Takashi Sakamoto | d81052f | 2017-06-09 06:37:06 +0900 | [diff] [blame] | 418 | * by corresponding returned bit, then preparing for next |
| 419 | * iteration. |
| 420 | */ |
Takashi Sakamoto | 0d4e399 | 2017-06-09 06:37:02 +0900 | [diff] [blame] | 421 | if (changed && r->var >= 0) { |
Takashi Sakamoto | 82e7d50 | 2017-06-11 23:56:13 +0900 | [diff] [blame] | 422 | if (hw_is_mask(r->var)) { |
| 423 | trace_hw_mask_param(substream, r->var, |
| 424 | k + 1, &old_mask, |
| 425 | hw_param_mask(params, r->var)); |
| 426 | } |
| 427 | if (hw_is_interval(r->var)) { |
| 428 | trace_hw_interval_param(substream, r->var, |
| 429 | k + 1, &old_interval, |
| 430 | hw_param_interval(params, r->var)); |
| 431 | } |
| 432 | |
Takashi Iwai | f9b0c05 | 2020-02-06 17:39:43 +0100 | [diff] [blame] | 433 | params->cmask |= PARAM_MASK_BIT(r->var); |
Takashi Sakamoto | 0d4e399 | 2017-06-09 06:37:02 +0900 | [diff] [blame] | 434 | vstamps[r->var] = stamp; |
Takashi Sakamoto | a1c06e3 | 2017-06-09 06:37:04 +0900 | [diff] [blame] | 435 | again = true; |
Takashi Sakamoto | 0d4e399 | 2017-06-09 06:37:02 +0900 | [diff] [blame] | 436 | } |
Takashi Sakamoto | f74ae15 | 2017-06-11 23:56:12 +0900 | [diff] [blame] | 437 | |
Takashi Sakamoto | 82e7d50 | 2017-06-11 23:56:13 +0900 | [diff] [blame] | 438 | rstamps[k] = stamp++; |
Takashi Sakamoto | 0d4e399 | 2017-06-09 06:37:02 +0900 | [diff] [blame] | 439 | } |
| 440 | |
Takashi Sakamoto | d81052f | 2017-06-09 06:37:06 +0900 | [diff] [blame] | 441 | /* Iterate to evaluate all rules till no parameters are changed. */ |
Takashi Sakamoto | 0d4e399 | 2017-06-09 06:37:02 +0900 | [diff] [blame] | 442 | if (again) |
| 443 | goto retry; |
Takashi Sakamoto | 9cc07f5 | 2017-06-09 06:37:01 +0900 | [diff] [blame] | 444 | |
Takashi Iwai | 5730f9f | 2018-03-13 11:18:57 +0100 | [diff] [blame] | 445 | out: |
| 446 | kfree(rstamps); |
| 447 | return err; |
Takashi Sakamoto | 9cc07f5 | 2017-06-09 06:37:01 +0900 | [diff] [blame] | 448 | } |
| 449 | |
Takashi Sakamoto | f9a076b | 2017-06-09 09:34:39 +0900 | [diff] [blame] | 450 | static int fixup_unreferenced_params(struct snd_pcm_substream *substream, |
| 451 | struct snd_pcm_hw_params *params) |
| 452 | { |
| 453 | const struct snd_interval *i; |
| 454 | const struct snd_mask *m; |
| 455 | int err; |
| 456 | |
| 457 | if (!params->msbits) { |
| 458 | i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); |
| 459 | if (snd_interval_single(i)) |
| 460 | params->msbits = snd_interval_value(i); |
| 461 | } |
| 462 | |
| 463 | if (!params->rate_den) { |
| 464 | i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE); |
| 465 | if (snd_interval_single(i)) { |
| 466 | params->rate_num = snd_interval_value(i); |
| 467 | params->rate_den = 1; |
| 468 | } |
| 469 | } |
| 470 | |
| 471 | if (!params->fifo_size) { |
| 472 | m = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT); |
| 473 | i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS); |
| 474 | if (snd_mask_single(m) && snd_interval_single(i)) { |
Takashi Iwai | fc033cb | 2019-11-17 09:53:03 +0100 | [diff] [blame] | 475 | err = snd_pcm_ops_ioctl(substream, |
| 476 | SNDRV_PCM_IOCTL1_FIFO_SIZE, |
| 477 | params); |
Takashi Sakamoto | f9a076b | 2017-06-09 09:34:39 +0900 | [diff] [blame] | 478 | if (err < 0) |
| 479 | return err; |
| 480 | } |
| 481 | } |
| 482 | |
Takashi Sakamoto | 7802fb5 | 2017-06-09 09:34:40 +0900 | [diff] [blame] | 483 | if (!params->info) { |
| 484 | params->info = substream->runtime->hw.info; |
| 485 | params->info &= ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES | |
| 486 | SNDRV_PCM_INFO_DRAIN_TRIGGER); |
| 487 | if (!hw_support_mmap(substream)) |
| 488 | params->info &= ~(SNDRV_PCM_INFO_MMAP | |
| 489 | SNDRV_PCM_INFO_MMAP_VALID); |
| 490 | } |
| 491 | |
Takashi Sakamoto | f9a076b | 2017-06-09 09:34:39 +0900 | [diff] [blame] | 492 | return 0; |
| 493 | } |
| 494 | |
Takashi Sakamoto | 9cc07f5 | 2017-06-09 06:37:01 +0900 | [diff] [blame] | 495 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, |
| 496 | struct snd_pcm_hw_params *params) |
| 497 | { |
Takashi Sakamoto | 9cc07f5 | 2017-06-09 06:37:01 +0900 | [diff] [blame] | 498 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | |
| 500 | params->info = 0; |
| 501 | params->fifo_size = 0; |
Takashi Iwai | f9b0c05 | 2020-02-06 17:39:43 +0100 | [diff] [blame] | 502 | if (params->rmask & PARAM_MASK_BIT(SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | params->msbits = 0; |
Takashi Iwai | f9b0c05 | 2020-02-06 17:39:43 +0100 | [diff] [blame] | 504 | if (params->rmask & PARAM_MASK_BIT(SNDRV_PCM_HW_PARAM_RATE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | params->rate_num = 0; |
| 506 | params->rate_den = 0; |
| 507 | } |
| 508 | |
Takashi Sakamoto | 9cc07f5 | 2017-06-09 06:37:01 +0900 | [diff] [blame] | 509 | err = constrain_mask_params(substream, params); |
| 510 | if (err < 0) |
| 511 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | |
Takashi Sakamoto | 9cc07f5 | 2017-06-09 06:37:01 +0900 | [diff] [blame] | 513 | err = constrain_interval_params(substream, params); |
| 514 | if (err < 0) |
| 515 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | |
Takashi Sakamoto | 9cc07f5 | 2017-06-09 06:37:01 +0900 | [diff] [blame] | 517 | err = constrain_params_by_rules(substream, params); |
| 518 | if (err < 0) |
| 519 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | params->rmask = 0; |
Takashi Sakamoto | 7802fb5 | 2017-06-09 09:34:40 +0900 | [diff] [blame] | 522 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | return 0; |
| 524 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 525 | EXPORT_SYMBOL(snd_pcm_hw_refine); |
| 526 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 527 | static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, |
| 528 | struct snd_pcm_hw_params __user * _params) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 530 | struct snd_pcm_hw_params *params; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | int err; |
| 532 | |
Li Zefan | ef44a1e | 2009-04-10 09:43:08 +0800 | [diff] [blame] | 533 | params = memdup_user(_params, sizeof(*params)); |
| 534 | if (IS_ERR(params)) |
| 535 | return PTR_ERR(params); |
| 536 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | err = snd_pcm_hw_refine(substream, params); |
Takashi Sakamoto | f74ae15 | 2017-06-11 23:56:12 +0900 | [diff] [blame] | 538 | if (err < 0) |
| 539 | goto end; |
Li Zefan | ef44a1e | 2009-04-10 09:43:08 +0800 | [diff] [blame] | 540 | |
Takashi Sakamoto | f74ae15 | 2017-06-11 23:56:12 +0900 | [diff] [blame] | 541 | err = fixup_unreferenced_params(substream, params); |
| 542 | if (err < 0) |
| 543 | goto end; |
| 544 | |
| 545 | if (copy_to_user(_params, params, sizeof(*params))) |
| 546 | err = -EFAULT; |
| 547 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | kfree(params); |
| 549 | return err; |
| 550 | } |
| 551 | |
Takashi Iwai | 9442e69 | 2006-09-30 23:27:19 -0700 | [diff] [blame] | 552 | static int period_to_usecs(struct snd_pcm_runtime *runtime) |
| 553 | { |
| 554 | int usecs; |
| 555 | |
| 556 | if (! runtime->rate) |
| 557 | return -1; /* invalid */ |
| 558 | |
| 559 | /* take 75% of period time as the deadline */ |
| 560 | usecs = (750000 / runtime->rate) * runtime->period_size; |
| 561 | usecs += ((750000 % runtime->rate) * runtime->period_size) / |
| 562 | runtime->rate; |
| 563 | |
| 564 | return usecs; |
| 565 | } |
| 566 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 567 | static void snd_pcm_set_state(struct snd_pcm_substream *substream, |
| 568 | snd_pcm_state_t state) |
Takashi Iwai | 9b0573c0 | 2012-10-12 15:07:34 +0200 | [diff] [blame] | 569 | { |
| 570 | snd_pcm_stream_lock_irq(substream); |
| 571 | if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED) |
| 572 | substream->runtime->status->state = state; |
| 573 | snd_pcm_stream_unlock_irq(substream); |
| 574 | } |
| 575 | |
Jie Yang | 90bbaf6 | 2015-10-16 17:57:46 +0800 | [diff] [blame] | 576 | static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream, |
| 577 | int event) |
| 578 | { |
| 579 | #ifdef CONFIG_SND_PCM_TIMER |
| 580 | if (substream->timer) |
| 581 | snd_timer_notify(substream->timer, event, |
| 582 | &substream->runtime->trigger_tstamp); |
| 583 | #endif |
| 584 | } |
| 585 | |
Takashi Iwai | 29bb274 | 2021-02-06 21:36:53 +0100 | [diff] [blame] | 586 | void snd_pcm_sync_stop(struct snd_pcm_substream *substream, bool sync_irq) |
Takashi Iwai | 1e850be | 2019-11-17 09:53:06 +0100 | [diff] [blame] | 587 | { |
Takashi Iwai | 29bb274 | 2021-02-06 21:36:53 +0100 | [diff] [blame] | 588 | if (substream->runtime && substream->runtime->stop_operating) { |
Takashi Iwai | 1e850be | 2019-11-17 09:53:06 +0100 | [diff] [blame] | 589 | substream->runtime->stop_operating = false; |
Takashi Iwai | 29bb274 | 2021-02-06 21:36:53 +0100 | [diff] [blame] | 590 | if (substream->ops && substream->ops->sync_stop) |
Takashi Iwai | 1e850be | 2019-11-17 09:53:06 +0100 | [diff] [blame] | 591 | substream->ops->sync_stop(substream); |
Takashi Iwai | 29bb274 | 2021-02-06 21:36:53 +0100 | [diff] [blame] | 592 | else if (sync_irq && substream->pcm->card->sync_irq > 0) |
Takashi Iwai | fabb26d | 2019-11-17 09:53:07 +0100 | [diff] [blame] | 593 | synchronize_irq(substream->pcm->card->sync_irq); |
Takashi Iwai | 1e850be | 2019-11-17 09:53:06 +0100 | [diff] [blame] | 594 | } |
| 595 | } |
| 596 | |
Takashi Sakamoto | 60f96aa | 2017-06-09 21:46:48 +0900 | [diff] [blame] | 597 | /** |
Mauro Carvalho Chehab | f7b6603 | 2020-10-23 18:33:35 +0200 | [diff] [blame] | 598 | * snd_pcm_hw_params_choose - choose a configuration defined by @params |
Takashi Sakamoto | 60f96aa | 2017-06-09 21:46:48 +0900 | [diff] [blame] | 599 | * @pcm: PCM instance |
| 600 | * @params: the hw_params instance |
| 601 | * |
| 602 | * Choose one configuration from configuration space defined by @params. |
| 603 | * The configuration chosen is that obtained fixing in this order: |
| 604 | * first access, first format, first subformat, min channels, |
| 605 | * min rate, min period time, max buffer size, min tick time |
| 606 | * |
| 607 | * Return: Zero if successful, or a negative error code on failure. |
| 608 | */ |
| 609 | static int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, |
| 610 | struct snd_pcm_hw_params *params) |
| 611 | { |
| 612 | static const int vars[] = { |
| 613 | SNDRV_PCM_HW_PARAM_ACCESS, |
| 614 | SNDRV_PCM_HW_PARAM_FORMAT, |
| 615 | SNDRV_PCM_HW_PARAM_SUBFORMAT, |
| 616 | SNDRV_PCM_HW_PARAM_CHANNELS, |
| 617 | SNDRV_PCM_HW_PARAM_RATE, |
| 618 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, |
| 619 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, |
| 620 | SNDRV_PCM_HW_PARAM_TICK_TIME, |
| 621 | -1 |
| 622 | }; |
| 623 | const int *v; |
Takashi Sakamoto | 7b8a54a | 2017-06-09 21:46:49 +0900 | [diff] [blame] | 624 | struct snd_mask old_mask; |
| 625 | struct snd_interval old_interval; |
Takashi Sakamoto | 82e7d50 | 2017-06-11 23:56:13 +0900 | [diff] [blame] | 626 | int changed; |
Takashi Sakamoto | 60f96aa | 2017-06-09 21:46:48 +0900 | [diff] [blame] | 627 | |
| 628 | for (v = vars; *v != -1; v++) { |
Takashi Sakamoto | 7b8a54a | 2017-06-09 21:46:49 +0900 | [diff] [blame] | 629 | /* Keep old parameter to trace. */ |
| 630 | if (trace_hw_mask_param_enabled()) { |
| 631 | if (hw_is_mask(*v)) |
| 632 | old_mask = *hw_param_mask(params, *v); |
| 633 | } |
| 634 | if (trace_hw_interval_param_enabled()) { |
| 635 | if (hw_is_interval(*v)) |
| 636 | old_interval = *hw_param_interval(params, *v); |
| 637 | } |
Takashi Sakamoto | 60f96aa | 2017-06-09 21:46:48 +0900 | [diff] [blame] | 638 | if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE) |
Takashi Sakamoto | 82e7d50 | 2017-06-11 23:56:13 +0900 | [diff] [blame] | 639 | changed = snd_pcm_hw_param_first(pcm, params, *v, NULL); |
Takashi Sakamoto | 60f96aa | 2017-06-09 21:46:48 +0900 | [diff] [blame] | 640 | else |
Takashi Sakamoto | 82e7d50 | 2017-06-11 23:56:13 +0900 | [diff] [blame] | 641 | changed = snd_pcm_hw_param_last(pcm, params, *v, NULL); |
Takashi Iwai | e1a3a98 | 2018-04-09 17:12:16 +0200 | [diff] [blame] | 642 | if (changed < 0) |
Takashi Sakamoto | 82e7d50 | 2017-06-11 23:56:13 +0900 | [diff] [blame] | 643 | return changed; |
| 644 | if (changed == 0) |
| 645 | continue; |
Takashi Sakamoto | 7b8a54a | 2017-06-09 21:46:49 +0900 | [diff] [blame] | 646 | |
Takashi Sakamoto | 82e7d50 | 2017-06-11 23:56:13 +0900 | [diff] [blame] | 647 | /* Trace the changed parameter. */ |
Takashi Sakamoto | 7b8a54a | 2017-06-09 21:46:49 +0900 | [diff] [blame] | 648 | if (hw_is_mask(*v)) { |
| 649 | trace_hw_mask_param(pcm, *v, 0, &old_mask, |
| 650 | hw_param_mask(params, *v)); |
| 651 | } |
| 652 | if (hw_is_interval(*v)) { |
| 653 | trace_hw_interval_param(pcm, *v, 0, &old_interval, |
| 654 | hw_param_interval(params, *v)); |
| 655 | } |
Takashi Sakamoto | 60f96aa | 2017-06-09 21:46:48 +0900 | [diff] [blame] | 656 | } |
Takashi Sakamoto | 7b8a54a | 2017-06-09 21:46:49 +0900 | [diff] [blame] | 657 | |
Takashi Sakamoto | 60f96aa | 2017-06-09 21:46:48 +0900 | [diff] [blame] | 658 | return 0; |
| 659 | } |
| 660 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 661 | static int snd_pcm_hw_params(struct snd_pcm_substream *substream, |
| 662 | struct snd_pcm_hw_params *params) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 664 | struct snd_pcm_runtime *runtime; |
Takashi Iwai | 9442e69 | 2006-09-30 23:27:19 -0700 | [diff] [blame] | 665 | int err, usecs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | unsigned int bits; |
| 667 | snd_pcm_uframes_t frames; |
| 668 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 669 | if (PCM_RUNTIME_CHECK(substream)) |
| 670 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | snd_pcm_stream_lock_irq(substream); |
| 673 | switch (runtime->status->state) { |
| 674 | case SNDRV_PCM_STATE_OPEN: |
| 675 | case SNDRV_PCM_STATE_SETUP: |
| 676 | case SNDRV_PCM_STATE_PREPARED: |
| 677 | break; |
| 678 | default: |
| 679 | snd_pcm_stream_unlock_irq(substream); |
| 680 | return -EBADFD; |
| 681 | } |
| 682 | snd_pcm_stream_unlock_irq(substream); |
Takashi Iwai | 8eeaa2f | 2014-02-10 09:48:47 +0100 | [diff] [blame] | 683 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | if (!substream->oss.oss) |
| 685 | #endif |
Takashi Iwai | 9c323fc | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 686 | if (atomic_read(&substream->mmap_count)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | return -EBADFD; |
| 688 | |
Takashi Iwai | 29bb274 | 2021-02-06 21:36:53 +0100 | [diff] [blame] | 689 | snd_pcm_sync_stop(substream, true); |
Takashi Iwai | 1e850be | 2019-11-17 09:53:06 +0100 | [diff] [blame] | 690 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | params->rmask = ~0U; |
| 692 | err = snd_pcm_hw_refine(substream, params); |
| 693 | if (err < 0) |
| 694 | goto _error; |
| 695 | |
| 696 | err = snd_pcm_hw_params_choose(substream, params); |
| 697 | if (err < 0) |
| 698 | goto _error; |
| 699 | |
Takashi Sakamoto | f9a076b | 2017-06-09 09:34:39 +0900 | [diff] [blame] | 700 | err = fixup_unreferenced_params(substream, params); |
| 701 | if (err < 0) |
| 702 | goto _error; |
| 703 | |
Takashi Iwai | 0dba808 | 2019-11-17 09:53:01 +0100 | [diff] [blame] | 704 | if (substream->managed_buffer_alloc) { |
| 705 | err = snd_pcm_lib_malloc_pages(substream, |
| 706 | params_buffer_bytes(params)); |
| 707 | if (err < 0) |
| 708 | goto _error; |
| 709 | runtime->buffer_changed = err > 0; |
| 710 | } |
| 711 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | if (substream->ops->hw_params != NULL) { |
| 713 | err = substream->ops->hw_params(substream, params); |
| 714 | if (err < 0) |
| 715 | goto _error; |
| 716 | } |
| 717 | |
| 718 | runtime->access = params_access(params); |
| 719 | runtime->format = params_format(params); |
| 720 | runtime->subformat = params_subformat(params); |
| 721 | runtime->channels = params_channels(params); |
| 722 | runtime->rate = params_rate(params); |
| 723 | runtime->period_size = params_period_size(params); |
| 724 | runtime->periods = params_periods(params); |
| 725 | runtime->buffer_size = params_buffer_size(params); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | runtime->info = params->info; |
| 727 | runtime->rate_num = params->rate_num; |
| 728 | runtime->rate_den = params->rate_den; |
Clemens Ladisch | ab69a49 | 2010-11-15 10:46:23 +0100 | [diff] [blame] | 729 | runtime->no_period_wakeup = |
| 730 | (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) && |
| 731 | (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | |
| 733 | bits = snd_pcm_format_physical_width(runtime->format); |
| 734 | runtime->sample_bits = bits; |
| 735 | bits *= runtime->channels; |
| 736 | runtime->frame_bits = bits; |
| 737 | frames = 1; |
| 738 | while (bits % 8 != 0) { |
| 739 | bits *= 2; |
| 740 | frames *= 2; |
| 741 | } |
| 742 | runtime->byte_align = bits / 8; |
| 743 | runtime->min_align = frames; |
| 744 | |
| 745 | /* Default sw params */ |
| 746 | runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; |
| 747 | runtime->period_step = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | runtime->control->avail_min = runtime->period_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | runtime->start_threshold = 1; |
| 750 | runtime->stop_threshold = runtime->buffer_size; |
| 751 | runtime->silence_threshold = 0; |
| 752 | runtime->silence_size = 0; |
Clemens Ladisch | ead4046 | 2010-05-21 09:15:59 +0200 | [diff] [blame] | 753 | runtime->boundary = runtime->buffer_size; |
| 754 | while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) |
| 755 | runtime->boundary *= 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | |
Takashi Iwai | add9d56 | 2019-12-11 16:57:42 +0100 | [diff] [blame] | 757 | /* clear the buffer for avoiding possible kernel info leaks */ |
Takashi Iwai | 618de0f | 2020-12-18 15:56:25 +0100 | [diff] [blame] | 758 | if (runtime->dma_area && !substream->ops->copy_user) { |
| 759 | size_t size = runtime->dma_bytes; |
| 760 | |
| 761 | if (runtime->info & SNDRV_PCM_INFO_MMAP) |
| 762 | size = PAGE_ALIGN(size); |
| 763 | memset(runtime->dma_area, 0, size); |
| 764 | } |
Takashi Iwai | add9d56 | 2019-12-11 16:57:42 +0100 | [diff] [blame] | 765 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | snd_pcm_timer_resolution_change(substream); |
Takashi Iwai | 9b0573c0 | 2012-10-12 15:07:34 +0200 | [diff] [blame] | 767 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP); |
Takashi Iwai | 9442e69 | 2006-09-30 23:27:19 -0700 | [diff] [blame] | 768 | |
Rafael J. Wysocki | 5371a79 | 2020-02-12 00:34:15 +0100 | [diff] [blame] | 769 | if (cpu_latency_qos_request_active(&substream->latency_pm_qos_req)) |
| 770 | cpu_latency_qos_remove_request(&substream->latency_pm_qos_req); |
Takashi Iwai | 9442e69 | 2006-09-30 23:27:19 -0700 | [diff] [blame] | 771 | if ((usecs = period_to_usecs(runtime)) >= 0) |
Rafael J. Wysocki | 5371a79 | 2020-02-12 00:34:15 +0100 | [diff] [blame] | 772 | cpu_latency_qos_add_request(&substream->latency_pm_qos_req, |
| 773 | usecs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | return 0; |
| 775 | _error: |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 776 | /* hardware might be unusable from this time, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | so we force application to retry to set |
| 778 | the correct hardware parameter settings */ |
Takashi Iwai | 9b0573c0 | 2012-10-12 15:07:34 +0200 | [diff] [blame] | 779 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | if (substream->ops->hw_free != NULL) |
| 781 | substream->ops->hw_free(substream); |
Takashi Iwai | 0dba808 | 2019-11-17 09:53:01 +0100 | [diff] [blame] | 782 | if (substream->managed_buffer_alloc) |
| 783 | snd_pcm_lib_free_pages(substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | return err; |
| 785 | } |
| 786 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 787 | static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, |
| 788 | struct snd_pcm_hw_params __user * _params) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 790 | struct snd_pcm_hw_params *params; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | int err; |
| 792 | |
Li Zefan | ef44a1e | 2009-04-10 09:43:08 +0800 | [diff] [blame] | 793 | params = memdup_user(_params, sizeof(*params)); |
| 794 | if (IS_ERR(params)) |
| 795 | return PTR_ERR(params); |
| 796 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | err = snd_pcm_hw_params(substream, params); |
Takashi Sakamoto | f74ae15 | 2017-06-11 23:56:12 +0900 | [diff] [blame] | 798 | if (err < 0) |
| 799 | goto end; |
Li Zefan | ef44a1e | 2009-04-10 09:43:08 +0800 | [diff] [blame] | 800 | |
Takashi Sakamoto | f74ae15 | 2017-06-11 23:56:12 +0900 | [diff] [blame] | 801 | if (copy_to_user(_params, params, sizeof(*params))) |
| 802 | err = -EFAULT; |
| 803 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | kfree(params); |
| 805 | return err; |
| 806 | } |
| 807 | |
Takashi Iwai | 66f2d19 | 2020-01-29 20:59:07 +0100 | [diff] [blame] | 808 | static int do_hw_free(struct snd_pcm_substream *substream) |
| 809 | { |
| 810 | int result = 0; |
| 811 | |
Takashi Iwai | 29bb274 | 2021-02-06 21:36:53 +0100 | [diff] [blame] | 812 | snd_pcm_sync_stop(substream, true); |
Takashi Iwai | 66f2d19 | 2020-01-29 20:59:07 +0100 | [diff] [blame] | 813 | if (substream->ops->hw_free) |
| 814 | result = substream->ops->hw_free(substream); |
| 815 | if (substream->managed_buffer_alloc) |
| 816 | snd_pcm_lib_free_pages(substream); |
| 817 | return result; |
| 818 | } |
| 819 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 820 | static int snd_pcm_hw_free(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 822 | struct snd_pcm_runtime *runtime; |
Takashi Iwai | 66f2d19 | 2020-01-29 20:59:07 +0100 | [diff] [blame] | 823 | int result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 825 | if (PCM_RUNTIME_CHECK(substream)) |
| 826 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | snd_pcm_stream_lock_irq(substream); |
| 829 | switch (runtime->status->state) { |
| 830 | case SNDRV_PCM_STATE_SETUP: |
| 831 | case SNDRV_PCM_STATE_PREPARED: |
| 832 | break; |
| 833 | default: |
| 834 | snd_pcm_stream_unlock_irq(substream); |
| 835 | return -EBADFD; |
| 836 | } |
| 837 | snd_pcm_stream_unlock_irq(substream); |
Takashi Iwai | 9c323fc | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 838 | if (atomic_read(&substream->mmap_count)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | return -EBADFD; |
Takashi Iwai | 66f2d19 | 2020-01-29 20:59:07 +0100 | [diff] [blame] | 840 | result = do_hw_free(substream); |
Takashi Iwai | 9b0573c0 | 2012-10-12 15:07:34 +0200 | [diff] [blame] | 841 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); |
Rafael J. Wysocki | 5371a79 | 2020-02-12 00:34:15 +0100 | [diff] [blame] | 842 | cpu_latency_qos_remove_request(&substream->latency_pm_qos_req); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | return result; |
| 844 | } |
| 845 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 846 | static int snd_pcm_sw_params(struct snd_pcm_substream *substream, |
| 847 | struct snd_pcm_sw_params *params) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 849 | struct snd_pcm_runtime *runtime; |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 850 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 852 | if (PCM_RUNTIME_CHECK(substream)) |
| 853 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | snd_pcm_stream_lock_irq(substream); |
| 856 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
| 857 | snd_pcm_stream_unlock_irq(substream); |
| 858 | return -EBADFD; |
| 859 | } |
| 860 | snd_pcm_stream_unlock_irq(substream); |
| 861 | |
Dan Carpenter | 145d92e | 2015-09-23 12:42:28 +0300 | [diff] [blame] | 862 | if (params->tstamp_mode < 0 || |
| 863 | params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | return -EINVAL; |
Takashi Iwai | 58900810 | 2014-07-16 17:45:27 +0200 | [diff] [blame] | 865 | if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) && |
| 866 | params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST) |
Takashi Iwai | 5646eda | 2014-07-10 09:50:19 +0200 | [diff] [blame] | 867 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | if (params->avail_min == 0) |
| 869 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | if (params->silence_size >= runtime->boundary) { |
| 871 | if (params->silence_threshold != 0) |
| 872 | return -EINVAL; |
| 873 | } else { |
| 874 | if (params->silence_size > params->silence_threshold) |
| 875 | return -EINVAL; |
| 876 | if (params->silence_threshold > runtime->buffer_size) |
| 877 | return -EINVAL; |
| 878 | } |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 879 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | snd_pcm_stream_lock_irq(substream); |
| 881 | runtime->tstamp_mode = params->tstamp_mode; |
Takashi Iwai | 58900810 | 2014-07-16 17:45:27 +0200 | [diff] [blame] | 882 | if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12)) |
| 883 | runtime->tstamp_type = params->tstamp_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | runtime->period_step = params->period_step; |
| 885 | runtime->control->avail_min = params->avail_min; |
| 886 | runtime->start_threshold = params->start_threshold; |
| 887 | runtime->stop_threshold = params->stop_threshold; |
| 888 | runtime->silence_threshold = params->silence_threshold; |
| 889 | runtime->silence_size = params->silence_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | params->boundary = runtime->boundary; |
| 891 | if (snd_pcm_running(substream)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
| 893 | runtime->silence_size > 0) |
| 894 | snd_pcm_playback_silence(substream, ULONG_MAX); |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 895 | err = snd_pcm_update_state(substream, runtime); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | } |
| 897 | snd_pcm_stream_unlock_irq(substream); |
Jaroslav Kysela | 1250932 | 2010-01-07 15:36:31 +0100 | [diff] [blame] | 898 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | } |
| 900 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 901 | static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, |
| 902 | struct snd_pcm_sw_params __user * _params) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 904 | struct snd_pcm_sw_params params; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | int err; |
| 906 | if (copy_from_user(¶ms, _params, sizeof(params))) |
| 907 | return -EFAULT; |
| 908 | err = snd_pcm_sw_params(substream, ¶ms); |
| 909 | if (copy_to_user(_params, ¶ms, sizeof(params))) |
| 910 | return -EFAULT; |
| 911 | return err; |
| 912 | } |
| 913 | |
Takashi Iwai | c99c5a3 | 2018-04-11 18:07:27 +0200 | [diff] [blame] | 914 | static inline snd_pcm_uframes_t |
| 915 | snd_pcm_calc_delay(struct snd_pcm_substream *substream) |
| 916 | { |
| 917 | snd_pcm_uframes_t delay; |
| 918 | |
| 919 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 920 | delay = snd_pcm_playback_hw_avail(substream->runtime); |
| 921 | else |
| 922 | delay = snd_pcm_capture_avail(substream->runtime); |
| 923 | return delay + substream->runtime->delay; |
| 924 | } |
| 925 | |
Baolin Wang | 3ddee7f | 2018-04-24 20:06:11 +0800 | [diff] [blame] | 926 | int snd_pcm_status64(struct snd_pcm_substream *substream, |
| 927 | struct snd_pcm_status64 *status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 929 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | |
| 931 | snd_pcm_stream_lock_irq(substream); |
Pierre-Louis Bossart | 3179f62 | 2015-02-13 15:14:06 -0600 | [diff] [blame] | 932 | |
| 933 | snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data, |
| 934 | &runtime->audio_tstamp_config); |
| 935 | |
| 936 | /* backwards compatible behavior */ |
| 937 | if (runtime->audio_tstamp_config.type_requested == |
| 938 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) { |
| 939 | if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK) |
| 940 | runtime->audio_tstamp_config.type_requested = |
| 941 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK; |
| 942 | else |
| 943 | runtime->audio_tstamp_config.type_requested = |
| 944 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT; |
| 945 | runtime->audio_tstamp_report.valid = 0; |
| 946 | } else |
| 947 | runtime->audio_tstamp_report.valid = 1; |
| 948 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | status->state = runtime->status->state; |
| 950 | status->suspended_state = runtime->status->suspended_state; |
| 951 | if (status->state == SNDRV_PCM_STATE_OPEN) |
| 952 | goto _end; |
Baolin Wang | 3ddee7f | 2018-04-24 20:06:11 +0800 | [diff] [blame] | 953 | status->trigger_tstamp_sec = runtime->trigger_tstamp.tv_sec; |
| 954 | status->trigger_tstamp_nsec = runtime->trigger_tstamp.tv_nsec; |
Jaroslav Kysela | 8c12158 | 2008-01-11 08:45:08 +0100 | [diff] [blame] | 955 | if (snd_pcm_running(substream)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | snd_pcm_update_hw_ptr(substream); |
Jaroslav Kysela | 8c12158 | 2008-01-11 08:45:08 +0100 | [diff] [blame] | 957 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
Baolin Wang | 3ddee7f | 2018-04-24 20:06:11 +0800 | [diff] [blame] | 958 | status->tstamp_sec = runtime->status->tstamp.tv_sec; |
| 959 | status->tstamp_nsec = |
| 960 | runtime->status->tstamp.tv_nsec; |
| 961 | status->driver_tstamp_sec = |
| 962 | runtime->driver_tstamp.tv_sec; |
| 963 | status->driver_tstamp_nsec = |
| 964 | runtime->driver_tstamp.tv_nsec; |
| 965 | status->audio_tstamp_sec = |
| 966 | runtime->status->audio_tstamp.tv_sec; |
| 967 | status->audio_tstamp_nsec = |
| 968 | runtime->status->audio_tstamp.tv_nsec; |
Pierre-Louis Bossart | 3179f62 | 2015-02-13 15:14:06 -0600 | [diff] [blame] | 969 | if (runtime->audio_tstamp_report.valid == 1) |
| 970 | /* backwards compatibility, no report provided in COMPAT mode */ |
| 971 | snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data, |
| 972 | &status->audio_tstamp_accuracy, |
| 973 | &runtime->audio_tstamp_report); |
| 974 | |
Jaroslav Kysela | 8c12158 | 2008-01-11 08:45:08 +0100 | [diff] [blame] | 975 | goto _tstamp_end; |
| 976 | } |
Pierre-Louis Bossart | 0d59b81 | 2015-02-06 15:55:50 -0600 | [diff] [blame] | 977 | } else { |
| 978 | /* get tstamp only in fallback mode and only if enabled */ |
Baolin Wang | fcae40c | 2018-04-24 20:06:08 +0800 | [diff] [blame] | 979 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
| 980 | struct timespec64 tstamp; |
| 981 | |
| 982 | snd_pcm_gettime(runtime, &tstamp); |
Baolin Wang | 3ddee7f | 2018-04-24 20:06:11 +0800 | [diff] [blame] | 983 | status->tstamp_sec = tstamp.tv_sec; |
| 984 | status->tstamp_nsec = tstamp.tv_nsec; |
Baolin Wang | fcae40c | 2018-04-24 20:06:08 +0800 | [diff] [blame] | 985 | } |
Jaroslav Kysela | 8c12158 | 2008-01-11 08:45:08 +0100 | [diff] [blame] | 986 | } |
Jaroslav Kysela | 8c12158 | 2008-01-11 08:45:08 +0100 | [diff] [blame] | 987 | _tstamp_end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | status->appl_ptr = runtime->control->appl_ptr; |
| 989 | status->hw_ptr = runtime->status->hw_ptr; |
Takashi Iwai | 763e506 | 2018-04-11 17:56:52 +0200 | [diff] [blame] | 990 | status->avail = snd_pcm_avail(substream); |
Takashi Iwai | c99c5a3 | 2018-04-11 18:07:27 +0200 | [diff] [blame] | 991 | status->delay = snd_pcm_running(substream) ? |
| 992 | snd_pcm_calc_delay(substream) : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | status->avail_max = runtime->avail_max; |
| 994 | status->overrange = runtime->overrange; |
| 995 | runtime->avail_max = 0; |
| 996 | runtime->overrange = 0; |
| 997 | _end: |
| 998 | snd_pcm_stream_unlock_irq(substream); |
| 999 | return 0; |
| 1000 | } |
| 1001 | |
Baolin Wang | 3ddee7f | 2018-04-24 20:06:11 +0800 | [diff] [blame] | 1002 | static int snd_pcm_status_user64(struct snd_pcm_substream *substream, |
| 1003 | struct snd_pcm_status64 __user * _status, |
| 1004 | bool ext) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | { |
Baolin Wang | 3ddee7f | 2018-04-24 20:06:11 +0800 | [diff] [blame] | 1006 | struct snd_pcm_status64 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | int res; |
Pierre-Louis Bossart | 38ca2a4 | 2015-02-13 15:14:04 -0600 | [diff] [blame] | 1008 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | memset(&status, 0, sizeof(status)); |
Pierre-Louis Bossart | 38ca2a4 | 2015-02-13 15:14:04 -0600 | [diff] [blame] | 1010 | /* |
| 1011 | * with extension, parameters are read/write, |
| 1012 | * get audio_tstamp_data from user, |
| 1013 | * ignore rest of status structure |
| 1014 | */ |
| 1015 | if (ext && get_user(status.audio_tstamp_data, |
| 1016 | (u32 __user *)(&_status->audio_tstamp_data))) |
| 1017 | return -EFAULT; |
Baolin Wang | 3ddee7f | 2018-04-24 20:06:11 +0800 | [diff] [blame] | 1018 | res = snd_pcm_status64(substream, &status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | if (res < 0) |
| 1020 | return res; |
| 1021 | if (copy_to_user(_status, &status, sizeof(status))) |
| 1022 | return -EFAULT; |
| 1023 | return 0; |
| 1024 | } |
| 1025 | |
Baolin Wang | 3ddee7f | 2018-04-24 20:06:11 +0800 | [diff] [blame] | 1026 | static int snd_pcm_status_user32(struct snd_pcm_substream *substream, |
| 1027 | struct snd_pcm_status32 __user * _status, |
| 1028 | bool ext) |
| 1029 | { |
| 1030 | struct snd_pcm_status64 status64; |
| 1031 | struct snd_pcm_status32 status32; |
| 1032 | int res; |
| 1033 | |
| 1034 | memset(&status64, 0, sizeof(status64)); |
| 1035 | memset(&status32, 0, sizeof(status32)); |
| 1036 | /* |
| 1037 | * with extension, parameters are read/write, |
| 1038 | * get audio_tstamp_data from user, |
| 1039 | * ignore rest of status structure |
| 1040 | */ |
| 1041 | if (ext && get_user(status64.audio_tstamp_data, |
| 1042 | (u32 __user *)(&_status->audio_tstamp_data))) |
| 1043 | return -EFAULT; |
| 1044 | res = snd_pcm_status64(substream, &status64); |
| 1045 | if (res < 0) |
| 1046 | return res; |
| 1047 | |
| 1048 | status32 = (struct snd_pcm_status32) { |
| 1049 | .state = status64.state, |
| 1050 | .trigger_tstamp_sec = status64.trigger_tstamp_sec, |
| 1051 | .trigger_tstamp_nsec = status64.trigger_tstamp_nsec, |
| 1052 | .tstamp_sec = status64.tstamp_sec, |
| 1053 | .tstamp_nsec = status64.tstamp_nsec, |
| 1054 | .appl_ptr = status64.appl_ptr, |
| 1055 | .hw_ptr = status64.hw_ptr, |
| 1056 | .delay = status64.delay, |
| 1057 | .avail = status64.avail, |
| 1058 | .avail_max = status64.avail_max, |
| 1059 | .overrange = status64.overrange, |
| 1060 | .suspended_state = status64.suspended_state, |
| 1061 | .audio_tstamp_data = status64.audio_tstamp_data, |
| 1062 | .audio_tstamp_sec = status64.audio_tstamp_sec, |
| 1063 | .audio_tstamp_nsec = status64.audio_tstamp_nsec, |
| 1064 | .driver_tstamp_sec = status64.audio_tstamp_sec, |
| 1065 | .driver_tstamp_nsec = status64.audio_tstamp_nsec, |
| 1066 | .audio_tstamp_accuracy = status64.audio_tstamp_accuracy, |
| 1067 | }; |
| 1068 | |
| 1069 | if (copy_to_user(_status, &status32, sizeof(status32))) |
| 1070 | return -EFAULT; |
| 1071 | |
| 1072 | return 0; |
| 1073 | } |
| 1074 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1075 | static int snd_pcm_channel_info(struct snd_pcm_substream *substream, |
| 1076 | struct snd_pcm_channel_info * info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1078 | struct snd_pcm_runtime *runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | unsigned int channel; |
| 1080 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | channel = info->channel; |
| 1082 | runtime = substream->runtime; |
| 1083 | snd_pcm_stream_lock_irq(substream); |
| 1084 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
| 1085 | snd_pcm_stream_unlock_irq(substream); |
| 1086 | return -EBADFD; |
| 1087 | } |
| 1088 | snd_pcm_stream_unlock_irq(substream); |
| 1089 | if (channel >= runtime->channels) |
| 1090 | return -EINVAL; |
| 1091 | memset(info, 0, sizeof(*info)); |
| 1092 | info->channel = channel; |
Takashi Iwai | fc033cb | 2019-11-17 09:53:03 +0100 | [diff] [blame] | 1093 | return snd_pcm_ops_ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | } |
| 1095 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1096 | static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, |
| 1097 | struct snd_pcm_channel_info __user * _info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1099 | struct snd_pcm_channel_info info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | int res; |
| 1101 | |
| 1102 | if (copy_from_user(&info, _info, sizeof(info))) |
| 1103 | return -EFAULT; |
| 1104 | res = snd_pcm_channel_info(substream, &info); |
| 1105 | if (res < 0) |
| 1106 | return res; |
| 1107 | if (copy_to_user(_info, &info, sizeof(info))) |
| 1108 | return -EFAULT; |
| 1109 | return 0; |
| 1110 | } |
| 1111 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1112 | static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1114 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | if (runtime->trigger_master == NULL) |
| 1116 | return; |
| 1117 | if (runtime->trigger_master == substream) { |
Pierre-Louis Bossart | 2b79d7a | 2015-02-06 15:55:51 -0600 | [diff] [blame] | 1118 | if (!runtime->trigger_tstamp_latched) |
| 1119 | snd_pcm_gettime(runtime, &runtime->trigger_tstamp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | } else { |
| 1121 | snd_pcm_trigger_tstamp(runtime->trigger_master); |
| 1122 | runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; |
| 1123 | } |
| 1124 | runtime->trigger_master = NULL; |
| 1125 | } |
| 1126 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1127 | #define ACTION_ARG_IGNORE (__force snd_pcm_state_t)0 |
| 1128 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | struct action_ops { |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1130 | int (*pre_action)(struct snd_pcm_substream *substream, |
| 1131 | snd_pcm_state_t state); |
| 1132 | int (*do_action)(struct snd_pcm_substream *substream, |
| 1133 | snd_pcm_state_t state); |
| 1134 | void (*undo_action)(struct snd_pcm_substream *substream, |
| 1135 | snd_pcm_state_t state); |
| 1136 | void (*post_action)(struct snd_pcm_substream *substream, |
| 1137 | snd_pcm_state_t state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | }; |
| 1139 | |
| 1140 | /* |
| 1141 | * this functions is core for handling of linked stream |
| 1142 | * Note: the stream state might be changed also on failure |
| 1143 | * Note2: call with calling stream lock + link lock |
| 1144 | */ |
Julia Lawall | b17154c | 2015-11-29 16:36:40 +0100 | [diff] [blame] | 1145 | static int snd_pcm_action_group(const struct action_ops *ops, |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1146 | struct snd_pcm_substream *substream, |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1147 | snd_pcm_state_t state, |
| 1148 | bool do_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1150 | struct snd_pcm_substream *s = NULL; |
| 1151 | struct snd_pcm_substream *s1; |
Takashi Iwai | dde1c65 | 2014-10-21 15:32:13 +0200 | [diff] [blame] | 1152 | int res = 0, depth = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | |
Takashi Iwai | ef991b9 | 2007-02-22 12:52:53 +0100 | [diff] [blame] | 1154 | snd_pcm_group_for_each_entry(s, substream) { |
Takashi Iwai | 257f8cc | 2014-08-29 15:32:29 +0200 | [diff] [blame] | 1155 | if (do_lock && s != substream) { |
| 1156 | if (s->pcm->nonatomic) |
Takashi Iwai | dde1c65 | 2014-10-21 15:32:13 +0200 | [diff] [blame] | 1157 | mutex_lock_nested(&s->self_group.mutex, depth); |
Takashi Iwai | 257f8cc | 2014-08-29 15:32:29 +0200 | [diff] [blame] | 1158 | else |
Takashi Iwai | dde1c65 | 2014-10-21 15:32:13 +0200 | [diff] [blame] | 1159 | spin_lock_nested(&s->self_group.lock, depth); |
| 1160 | depth++; |
Takashi Iwai | 257f8cc | 2014-08-29 15:32:29 +0200 | [diff] [blame] | 1161 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | res = ops->pre_action(s, state); |
| 1163 | if (res < 0) |
| 1164 | goto _unlock; |
| 1165 | } |
Takashi Iwai | ef991b9 | 2007-02-22 12:52:53 +0100 | [diff] [blame] | 1166 | snd_pcm_group_for_each_entry(s, substream) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | res = ops->do_action(s, state); |
| 1168 | if (res < 0) { |
| 1169 | if (ops->undo_action) { |
Takashi Iwai | ef991b9 | 2007-02-22 12:52:53 +0100 | [diff] [blame] | 1170 | snd_pcm_group_for_each_entry(s1, substream) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | if (s1 == s) /* failed stream */ |
| 1172 | break; |
| 1173 | ops->undo_action(s1, state); |
| 1174 | } |
| 1175 | } |
| 1176 | s = NULL; /* unlock all */ |
| 1177 | goto _unlock; |
| 1178 | } |
| 1179 | } |
Takashi Iwai | ef991b9 | 2007-02-22 12:52:53 +0100 | [diff] [blame] | 1180 | snd_pcm_group_for_each_entry(s, substream) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | ops->post_action(s, state); |
| 1182 | } |
| 1183 | _unlock: |
| 1184 | if (do_lock) { |
| 1185 | /* unlock streams */ |
Takashi Iwai | ef991b9 | 2007-02-22 12:52:53 +0100 | [diff] [blame] | 1186 | snd_pcm_group_for_each_entry(s1, substream) { |
Takashi Iwai | 257f8cc | 2014-08-29 15:32:29 +0200 | [diff] [blame] | 1187 | if (s1 != substream) { |
Takashi Iwai | 811deed | 2014-10-13 23:14:46 +0200 | [diff] [blame] | 1188 | if (s1->pcm->nonatomic) |
Takashi Iwai | 257f8cc | 2014-08-29 15:32:29 +0200 | [diff] [blame] | 1189 | mutex_unlock(&s1->self_group.mutex); |
| 1190 | else |
| 1191 | spin_unlock(&s1->self_group.lock); |
| 1192 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | if (s1 == s) /* end */ |
| 1194 | break; |
| 1195 | } |
| 1196 | } |
| 1197 | return res; |
| 1198 | } |
| 1199 | |
| 1200 | /* |
| 1201 | * Note: call with stream lock |
| 1202 | */ |
Julia Lawall | b17154c | 2015-11-29 16:36:40 +0100 | [diff] [blame] | 1203 | static int snd_pcm_action_single(const struct action_ops *ops, |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1204 | struct snd_pcm_substream *substream, |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1205 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | { |
| 1207 | int res; |
| 1208 | |
| 1209 | res = ops->pre_action(substream, state); |
| 1210 | if (res < 0) |
| 1211 | return res; |
| 1212 | res = ops->do_action(substream, state); |
| 1213 | if (res == 0) |
| 1214 | ops->post_action(substream, state); |
| 1215 | else if (ops->undo_action) |
| 1216 | ops->undo_action(substream, state); |
| 1217 | return res; |
| 1218 | } |
| 1219 | |
Takashi Iwai | a41c4cb | 2019-01-13 09:40:21 +0100 | [diff] [blame] | 1220 | static void snd_pcm_group_assign(struct snd_pcm_substream *substream, |
| 1221 | struct snd_pcm_group *new_group) |
| 1222 | { |
| 1223 | substream->group = new_group; |
| 1224 | list_move(&substream->link_list, &new_group->substreams); |
| 1225 | } |
| 1226 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | /* |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 1228 | * Unref and unlock the group, but keep the stream lock; |
| 1229 | * when the group becomes empty and no longer referred, destroy itself |
| 1230 | */ |
| 1231 | static void snd_pcm_group_unref(struct snd_pcm_group *group, |
| 1232 | struct snd_pcm_substream *substream) |
| 1233 | { |
| 1234 | bool do_free; |
| 1235 | |
| 1236 | if (!group) |
| 1237 | return; |
Takashi Iwai | 0e279dc | 2019-07-19 10:55:05 +0200 | [diff] [blame] | 1238 | do_free = refcount_dec_and_test(&group->refs); |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 1239 | snd_pcm_group_unlock(group, substream->pcm->nonatomic); |
| 1240 | if (do_free) |
| 1241 | kfree(group); |
| 1242 | } |
| 1243 | |
| 1244 | /* |
| 1245 | * Lock the group inside a stream lock and reference it; |
| 1246 | * return the locked group object, or NULL if not linked |
| 1247 | */ |
| 1248 | static struct snd_pcm_group * |
| 1249 | snd_pcm_stream_group_ref(struct snd_pcm_substream *substream) |
| 1250 | { |
| 1251 | bool nonatomic = substream->pcm->nonatomic; |
| 1252 | struct snd_pcm_group *group; |
| 1253 | bool trylock; |
| 1254 | |
| 1255 | for (;;) { |
| 1256 | if (!snd_pcm_stream_linked(substream)) |
| 1257 | return NULL; |
| 1258 | group = substream->group; |
| 1259 | /* block freeing the group object */ |
| 1260 | refcount_inc(&group->refs); |
| 1261 | |
| 1262 | trylock = nonatomic ? mutex_trylock(&group->mutex) : |
| 1263 | spin_trylock(&group->lock); |
| 1264 | if (trylock) |
| 1265 | break; /* OK */ |
| 1266 | |
| 1267 | /* re-lock for avoiding ABBA deadlock */ |
| 1268 | snd_pcm_stream_unlock(substream); |
| 1269 | snd_pcm_group_lock(group, nonatomic); |
| 1270 | snd_pcm_stream_lock(substream); |
| 1271 | |
| 1272 | /* check the group again; the above opens a small race window */ |
| 1273 | if (substream->group == group) |
| 1274 | break; /* OK */ |
| 1275 | /* group changed, try again */ |
| 1276 | snd_pcm_group_unref(group, substream); |
| 1277 | } |
| 1278 | return group; |
| 1279 | } |
| 1280 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | /* |
| 1282 | * Note: call with stream lock |
| 1283 | */ |
Julia Lawall | b17154c | 2015-11-29 16:36:40 +0100 | [diff] [blame] | 1284 | static int snd_pcm_action(const struct action_ops *ops, |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1285 | struct snd_pcm_substream *substream, |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1286 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | { |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 1288 | struct snd_pcm_group *group; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | int res; |
| 1290 | |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 1291 | group = snd_pcm_stream_group_ref(substream); |
| 1292 | if (group) |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1293 | res = snd_pcm_action_group(ops, substream, state, true); |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 1294 | else |
| 1295 | res = snd_pcm_action_single(ops, substream, state); |
| 1296 | snd_pcm_group_unref(group, substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | return res; |
| 1298 | } |
| 1299 | |
| 1300 | /* |
| 1301 | * Note: don't use any locks before |
| 1302 | */ |
Julia Lawall | b17154c | 2015-11-29 16:36:40 +0100 | [diff] [blame] | 1303 | static int snd_pcm_action_lock_irq(const struct action_ops *ops, |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1304 | struct snd_pcm_substream *substream, |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1305 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | { |
| 1307 | int res; |
| 1308 | |
Takashi Iwai | e3a4bd5 | 2014-10-31 14:45:04 +0100 | [diff] [blame] | 1309 | snd_pcm_stream_lock_irq(substream); |
| 1310 | res = snd_pcm_action(ops, substream, state); |
| 1311 | snd_pcm_stream_unlock_irq(substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | return res; |
| 1313 | } |
| 1314 | |
| 1315 | /* |
| 1316 | */ |
Julia Lawall | b17154c | 2015-11-29 16:36:40 +0100 | [diff] [blame] | 1317 | static int snd_pcm_action_nonatomic(const struct action_ops *ops, |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1318 | struct snd_pcm_substream *substream, |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1319 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1320 | { |
| 1321 | int res; |
| 1322 | |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 1323 | /* Guarantee the group members won't change during non-atomic action */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | down_read(&snd_pcm_link_rwsem); |
| 1325 | if (snd_pcm_stream_linked(substream)) |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1326 | res = snd_pcm_action_group(ops, substream, state, false); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | else |
| 1328 | res = snd_pcm_action_single(ops, substream, state); |
| 1329 | up_read(&snd_pcm_link_rwsem); |
| 1330 | return res; |
| 1331 | } |
| 1332 | |
| 1333 | /* |
| 1334 | * start callbacks |
| 1335 | */ |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1336 | static int snd_pcm_pre_start(struct snd_pcm_substream *substream, |
| 1337 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1339 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) |
| 1341 | return -EBADFD; |
| 1342 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
| 1343 | !snd_pcm_playback_data(substream)) |
| 1344 | return -EPIPE; |
Pierre-Louis Bossart | 2b79d7a | 2015-02-06 15:55:51 -0600 | [diff] [blame] | 1345 | runtime->trigger_tstamp_latched = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | runtime->trigger_master = substream; |
| 1347 | return 0; |
| 1348 | } |
| 1349 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1350 | static int snd_pcm_do_start(struct snd_pcm_substream *substream, |
| 1351 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1352 | { |
| 1353 | if (substream->runtime->trigger_master != substream) |
| 1354 | return 0; |
| 1355 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); |
| 1356 | } |
| 1357 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1358 | static void snd_pcm_undo_start(struct snd_pcm_substream *substream, |
| 1359 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | { |
| 1361 | if (substream->runtime->trigger_master == substream) |
| 1362 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); |
| 1363 | } |
| 1364 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1365 | static void snd_pcm_post_start(struct snd_pcm_substream *substream, |
| 1366 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1368 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | snd_pcm_trigger_tstamp(substream); |
Takashi Iwai | 6af3fb7 | 2009-05-27 10:49:26 +0200 | [diff] [blame] | 1370 | runtime->hw_ptr_jiffies = jiffies; |
Jaroslav Kysela | bd76af0 | 2010-08-18 14:16:54 +0200 | [diff] [blame] | 1371 | runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) / |
| 1372 | runtime->rate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1373 | runtime->status->state = state; |
| 1374 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
| 1375 | runtime->silence_size > 0) |
| 1376 | snd_pcm_playback_silence(substream, ULONG_MAX); |
Jie Yang | 90bbaf6 | 2015-10-16 17:57:46 +0800 | [diff] [blame] | 1377 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | } |
| 1379 | |
Julia Lawall | b17154c | 2015-11-29 16:36:40 +0100 | [diff] [blame] | 1380 | static const struct action_ops snd_pcm_action_start = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | .pre_action = snd_pcm_pre_start, |
| 1382 | .do_action = snd_pcm_do_start, |
| 1383 | .undo_action = snd_pcm_undo_start, |
| 1384 | .post_action = snd_pcm_post_start |
| 1385 | }; |
| 1386 | |
| 1387 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1388 | * snd_pcm_start - start all linked streams |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1389 | * @substream: the PCM substream instance |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1390 | * |
| 1391 | * Return: Zero if successful, or a negative error code. |
Takashi Iwai | c2c86a9 | 2017-05-10 14:33:44 +0200 | [diff] [blame] | 1392 | * The stream lock must be acquired before calling this function. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1393 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1394 | int snd_pcm_start(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1396 | return snd_pcm_action(&snd_pcm_action_start, substream, |
| 1397 | SNDRV_PCM_STATE_RUNNING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1398 | } |
| 1399 | |
Takashi Iwai | c2c86a9 | 2017-05-10 14:33:44 +0200 | [diff] [blame] | 1400 | /* take the stream lock and start the streams */ |
| 1401 | static int snd_pcm_start_lock_irq(struct snd_pcm_substream *substream) |
| 1402 | { |
| 1403 | return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, |
| 1404 | SNDRV_PCM_STATE_RUNNING); |
| 1405 | } |
| 1406 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | /* |
| 1408 | * stop callbacks |
| 1409 | */ |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1410 | static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, |
| 1411 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1413 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| 1415 | return -EBADFD; |
| 1416 | runtime->trigger_master = substream; |
| 1417 | return 0; |
| 1418 | } |
| 1419 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1420 | static int snd_pcm_do_stop(struct snd_pcm_substream *substream, |
| 1421 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | { |
| 1423 | if (substream->runtime->trigger_master == substream && |
Takashi Iwai | 700cb70 | 2021-02-06 21:36:55 +0100 | [diff] [blame] | 1424 | snd_pcm_running(substream)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1425 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); |
Takashi Iwai | 700cb70 | 2021-02-06 21:36:55 +0100 | [diff] [blame] | 1426 | substream->runtime->stop_operating = true; |
| 1427 | } |
Bhaskar Chowdhury | 583770e | 2021-03-26 12:12:11 +0530 | [diff] [blame] | 1428 | return 0; /* unconditionally stop all substreams */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | } |
| 1430 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1431 | static void snd_pcm_post_stop(struct snd_pcm_substream *substream, |
| 1432 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1433 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1434 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | if (runtime->status->state != state) { |
| 1436 | snd_pcm_trigger_tstamp(substream); |
Takashi Iwai | 9bc889b | 2014-11-06 12:15:25 +0100 | [diff] [blame] | 1437 | runtime->status->state = state; |
Jie Yang | 90bbaf6 | 2015-10-16 17:57:46 +0800 | [diff] [blame] | 1438 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | } |
| 1440 | wake_up(&runtime->sleep); |
Jaroslav Kysela | c91a988 | 2010-01-21 10:32:15 +0100 | [diff] [blame] | 1441 | wake_up(&runtime->tsleep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1442 | } |
| 1443 | |
Julia Lawall | b17154c | 2015-11-29 16:36:40 +0100 | [diff] [blame] | 1444 | static const struct action_ops snd_pcm_action_stop = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1445 | .pre_action = snd_pcm_pre_stop, |
| 1446 | .do_action = snd_pcm_do_stop, |
| 1447 | .post_action = snd_pcm_post_stop |
| 1448 | }; |
| 1449 | |
| 1450 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1451 | * snd_pcm_stop - try to stop all running streams in the substream group |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1452 | * @substream: the PCM substream instance |
| 1453 | * @state: PCM state after stopping the stream |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | * |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1455 | * The state of each stream is then changed to the given state unconditionally. |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1456 | * |
Masanari Iida | 0a11458 | 2014-02-09 00:47:36 +0900 | [diff] [blame] | 1457 | * Return: Zero if successful, or a negative error code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1458 | */ |
Clemens Ladisch | fea952e | 2011-02-14 11:00:47 +0100 | [diff] [blame] | 1459 | int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1460 | { |
| 1461 | return snd_pcm_action(&snd_pcm_action_stop, substream, state); |
| 1462 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1463 | EXPORT_SYMBOL(snd_pcm_stop); |
| 1464 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1466 | * snd_pcm_drain_done - stop the DMA only when the given stream is playback |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1467 | * @substream: the PCM substream |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1468 | * |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1469 | * After stopping, the state is changed to SETUP. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1470 | * Unlike snd_pcm_stop(), this affects only the given stream. |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1471 | * |
Bhaskar Chowdhury | 583770e | 2021-03-26 12:12:11 +0530 | [diff] [blame] | 1472 | * Return: Zero if successful, or a negative error code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1473 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1474 | int snd_pcm_drain_done(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1475 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1476 | return snd_pcm_action_single(&snd_pcm_action_stop, substream, |
| 1477 | SNDRV_PCM_STATE_SETUP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1478 | } |
| 1479 | |
Takashi Iwai | 1fb8510 | 2014-11-07 17:08:28 +0100 | [diff] [blame] | 1480 | /** |
| 1481 | * snd_pcm_stop_xrun - stop the running streams as XRUN |
| 1482 | * @substream: the PCM substream instance |
Takashi Iwai | 1fb8510 | 2014-11-07 17:08:28 +0100 | [diff] [blame] | 1483 | * |
| 1484 | * This stops the given running substream (and all linked substreams) as XRUN. |
| 1485 | * Unlike snd_pcm_stop(), this function takes the substream lock by itself. |
| 1486 | * |
| 1487 | * Return: Zero if successful, or a negative error code. |
| 1488 | */ |
| 1489 | int snd_pcm_stop_xrun(struct snd_pcm_substream *substream) |
| 1490 | { |
| 1491 | unsigned long flags; |
Takashi Iwai | 1fb8510 | 2014-11-07 17:08:28 +0100 | [diff] [blame] | 1492 | |
| 1493 | snd_pcm_stream_lock_irqsave(substream, flags); |
Takashi Iwai | e647f5a5 | 2018-07-04 15:08:05 +0200 | [diff] [blame] | 1494 | if (substream->runtime && snd_pcm_running(substream)) |
Takashi Iwai | 9cd641e | 2018-07-04 14:46:27 +0200 | [diff] [blame] | 1495 | __snd_pcm_xrun(substream); |
Takashi Iwai | 1fb8510 | 2014-11-07 17:08:28 +0100 | [diff] [blame] | 1496 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
Takashi Iwai | 9cd641e | 2018-07-04 14:46:27 +0200 | [diff] [blame] | 1497 | return 0; |
Takashi Iwai | 1fb8510 | 2014-11-07 17:08:28 +0100 | [diff] [blame] | 1498 | } |
| 1499 | EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun); |
| 1500 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1501 | /* |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1502 | * pause callbacks: pass boolean (to start pause or resume) as state argument |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1503 | */ |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1504 | #define pause_pushed(state) (__force bool)(state) |
| 1505 | |
| 1506 | static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, |
| 1507 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1509 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) |
| 1511 | return -ENOSYS; |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1512 | if (pause_pushed(state)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1513 | if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) |
| 1514 | return -EBADFD; |
| 1515 | } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) |
| 1516 | return -EBADFD; |
| 1517 | runtime->trigger_master = substream; |
| 1518 | return 0; |
| 1519 | } |
| 1520 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1521 | static int snd_pcm_do_pause(struct snd_pcm_substream *substream, |
| 1522 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1523 | { |
| 1524 | if (substream->runtime->trigger_master != substream) |
| 1525 | return 0; |
Jaroslav Kysela | 56385a1 | 2010-08-18 14:08:17 +0200 | [diff] [blame] | 1526 | /* some drivers might use hw_ptr to recover from the pause - |
| 1527 | update the hw_ptr now */ |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1528 | if (pause_pushed(state)) |
Jaroslav Kysela | 56385a1 | 2010-08-18 14:08:17 +0200 | [diff] [blame] | 1529 | snd_pcm_update_hw_ptr(substream); |
Takashi Iwai | 6af3fb7 | 2009-05-27 10:49:26 +0200 | [diff] [blame] | 1530 | /* The jiffies check in snd_pcm_update_hw_ptr*() is done by |
Uwe Kleine-König | b595076 | 2010-11-01 15:38:34 -0400 | [diff] [blame] | 1531 | * a delta between the current jiffies, this gives a large enough |
Takashi Iwai | 6af3fb7 | 2009-05-27 10:49:26 +0200 | [diff] [blame] | 1532 | * delta, effectively to skip the check once. |
| 1533 | */ |
| 1534 | substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1535 | return substream->ops->trigger(substream, |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1536 | pause_pushed(state) ? |
| 1537 | SNDRV_PCM_TRIGGER_PAUSE_PUSH : |
| 1538 | SNDRV_PCM_TRIGGER_PAUSE_RELEASE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1539 | } |
| 1540 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1541 | static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, |
| 1542 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1543 | { |
| 1544 | if (substream->runtime->trigger_master == substream) |
| 1545 | substream->ops->trigger(substream, |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1546 | pause_pushed(state) ? |
| 1547 | SNDRV_PCM_TRIGGER_PAUSE_RELEASE : |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1548 | SNDRV_PCM_TRIGGER_PAUSE_PUSH); |
| 1549 | } |
| 1550 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1551 | static void snd_pcm_post_pause(struct snd_pcm_substream *substream, |
| 1552 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1553 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1554 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1555 | snd_pcm_trigger_tstamp(substream); |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1556 | if (pause_pushed(state)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1557 | runtime->status->state = SNDRV_PCM_STATE_PAUSED; |
Jie Yang | 90bbaf6 | 2015-10-16 17:57:46 +0800 | [diff] [blame] | 1558 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1559 | wake_up(&runtime->sleep); |
Jaroslav Kysela | c91a988 | 2010-01-21 10:32:15 +0100 | [diff] [blame] | 1560 | wake_up(&runtime->tsleep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1561 | } else { |
| 1562 | runtime->status->state = SNDRV_PCM_STATE_RUNNING; |
Jie Yang | 90bbaf6 | 2015-10-16 17:57:46 +0800 | [diff] [blame] | 1563 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1564 | } |
| 1565 | } |
| 1566 | |
Julia Lawall | b17154c | 2015-11-29 16:36:40 +0100 | [diff] [blame] | 1567 | static const struct action_ops snd_pcm_action_pause = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1568 | .pre_action = snd_pcm_pre_pause, |
| 1569 | .do_action = snd_pcm_do_pause, |
| 1570 | .undo_action = snd_pcm_undo_pause, |
| 1571 | .post_action = snd_pcm_post_pause |
| 1572 | }; |
| 1573 | |
| 1574 | /* |
| 1575 | * Push/release the pause for all linked streams. |
| 1576 | */ |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1577 | static int snd_pcm_pause(struct snd_pcm_substream *substream, bool push) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1578 | { |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1579 | return snd_pcm_action(&snd_pcm_action_pause, substream, |
| 1580 | (__force snd_pcm_state_t)push); |
| 1581 | } |
| 1582 | |
| 1583 | static int snd_pcm_pause_lock_irq(struct snd_pcm_substream *substream, |
| 1584 | bool push) |
| 1585 | { |
| 1586 | return snd_pcm_action_lock_irq(&snd_pcm_action_pause, substream, |
| 1587 | (__force snd_pcm_state_t)push); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1588 | } |
| 1589 | |
| 1590 | #ifdef CONFIG_PM |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1591 | /* suspend callback: state argument ignored */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1592 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1593 | static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, |
| 1594 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1595 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1596 | struct snd_pcm_runtime *runtime = substream->runtime; |
Takashi Iwai | 113ce08 | 2019-03-25 10:38:58 +0100 | [diff] [blame] | 1597 | switch (runtime->status->state) { |
| 1598 | case SNDRV_PCM_STATE_SUSPENDED: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | return -EBUSY; |
Takashi Iwai | 113ce08 | 2019-03-25 10:38:58 +0100 | [diff] [blame] | 1600 | /* unresumable PCM state; return -EBUSY for skipping suspend */ |
| 1601 | case SNDRV_PCM_STATE_OPEN: |
| 1602 | case SNDRV_PCM_STATE_SETUP: |
| 1603 | case SNDRV_PCM_STATE_DISCONNECTED: |
| 1604 | return -EBUSY; |
| 1605 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1606 | runtime->trigger_master = substream; |
| 1607 | return 0; |
| 1608 | } |
| 1609 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1610 | static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, |
| 1611 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1612 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1613 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1614 | if (runtime->trigger_master != substream) |
| 1615 | return 0; |
| 1616 | if (! snd_pcm_running(substream)) |
| 1617 | return 0; |
| 1618 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); |
Takashi Iwai | 2c87c1a | 2021-02-06 21:36:54 +0100 | [diff] [blame] | 1619 | runtime->stop_operating = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1620 | return 0; /* suspend unconditionally */ |
| 1621 | } |
| 1622 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1623 | static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, |
| 1624 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1625 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1626 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1627 | snd_pcm_trigger_tstamp(substream); |
Takashi Iwai | 9bc889b | 2014-11-06 12:15:25 +0100 | [diff] [blame] | 1628 | runtime->status->suspended_state = runtime->status->state; |
| 1629 | runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; |
Jie Yang | 90bbaf6 | 2015-10-16 17:57:46 +0800 | [diff] [blame] | 1630 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1631 | wake_up(&runtime->sleep); |
Jaroslav Kysela | c91a988 | 2010-01-21 10:32:15 +0100 | [diff] [blame] | 1632 | wake_up(&runtime->tsleep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1633 | } |
| 1634 | |
Julia Lawall | b17154c | 2015-11-29 16:36:40 +0100 | [diff] [blame] | 1635 | static const struct action_ops snd_pcm_action_suspend = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1636 | .pre_action = snd_pcm_pre_suspend, |
| 1637 | .do_action = snd_pcm_do_suspend, |
| 1638 | .post_action = snd_pcm_post_suspend |
| 1639 | }; |
| 1640 | |
Takashi Iwai | ce7f93e2 | 2019-01-15 10:54:02 +0100 | [diff] [blame] | 1641 | /* |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1642 | * snd_pcm_suspend - trigger SUSPEND to all linked streams |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1643 | * @substream: the PCM substream |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1644 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1645 | * After this call, all streams are changed to SUSPENDED state. |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1646 | * |
Takashi Iwai | ce7f93e2 | 2019-01-15 10:54:02 +0100 | [diff] [blame] | 1647 | * Return: Zero if successful, or a negative error code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1648 | */ |
Takashi Iwai | ce7f93e2 | 2019-01-15 10:54:02 +0100 | [diff] [blame] | 1649 | static int snd_pcm_suspend(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | { |
| 1651 | int err; |
| 1652 | unsigned long flags; |
| 1653 | |
| 1654 | snd_pcm_stream_lock_irqsave(substream, flags); |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1655 | err = snd_pcm_action(&snd_pcm_action_suspend, substream, |
| 1656 | ACTION_ARG_IGNORE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1657 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
| 1658 | return err; |
| 1659 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1660 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1661 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1662 | * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1663 | * @pcm: the PCM instance |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1664 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1665 | * After this call, all streams are changed to SUSPENDED state. |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1666 | * |
| 1667 | * Return: Zero if successful (or @pcm is %NULL), or a negative error code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1668 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1669 | int snd_pcm_suspend_all(struct snd_pcm *pcm) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1670 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1671 | struct snd_pcm_substream *substream; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1672 | int stream, err = 0; |
| 1673 | |
Takashi Iwai | 603bf52 | 2005-11-17 15:59:14 +0100 | [diff] [blame] | 1674 | if (! pcm) |
| 1675 | return 0; |
| 1676 | |
Takashi Iwai | 8d19b4e | 2021-02-06 21:36:56 +0100 | [diff] [blame] | 1677 | for_each_pcm_substream(pcm, stream, substream) { |
| 1678 | /* FIXME: the open/close code should lock this as well */ |
| 1679 | if (!substream->runtime) |
| 1680 | continue; |
Ranjani Sridharan | d9c0b2a | 2019-02-08 17:29:53 -0600 | [diff] [blame] | 1681 | |
Takashi Iwai | 8d19b4e | 2021-02-06 21:36:56 +0100 | [diff] [blame] | 1682 | /* |
| 1683 | * Skip BE dai link PCM's that are internal and may |
| 1684 | * not have their substream ops set. |
| 1685 | */ |
| 1686 | if (!substream->ops) |
| 1687 | continue; |
Ranjani Sridharan | d9c0b2a | 2019-02-08 17:29:53 -0600 | [diff] [blame] | 1688 | |
Takashi Iwai | 8d19b4e | 2021-02-06 21:36:56 +0100 | [diff] [blame] | 1689 | err = snd_pcm_suspend(substream); |
| 1690 | if (err < 0 && err != -EBUSY) |
| 1691 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1692 | } |
Takashi Iwai | 2c87c1a | 2021-02-06 21:36:54 +0100 | [diff] [blame] | 1693 | |
Takashi Iwai | 8d19b4e | 2021-02-06 21:36:56 +0100 | [diff] [blame] | 1694 | for_each_pcm_substream(pcm, stream, substream) |
| 1695 | snd_pcm_sync_stop(substream, false); |
Takashi Iwai | 2c87c1a | 2021-02-06 21:36:54 +0100 | [diff] [blame] | 1696 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1697 | return 0; |
| 1698 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 1699 | EXPORT_SYMBOL(snd_pcm_suspend_all); |
| 1700 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1701 | /* resume callbacks: state argument ignored */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1702 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1703 | static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, |
| 1704 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1705 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1706 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1707 | if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) |
| 1708 | return -ENOSYS; |
| 1709 | runtime->trigger_master = substream; |
| 1710 | return 0; |
| 1711 | } |
| 1712 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1713 | static int snd_pcm_do_resume(struct snd_pcm_substream *substream, |
| 1714 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1715 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1716 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1717 | if (runtime->trigger_master != substream) |
| 1718 | return 0; |
| 1719 | /* DMA not running previously? */ |
| 1720 | if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && |
| 1721 | (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || |
| 1722 | substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) |
| 1723 | return 0; |
| 1724 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); |
| 1725 | } |
| 1726 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1727 | static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, |
| 1728 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | { |
| 1730 | if (substream->runtime->trigger_master == substream && |
| 1731 | snd_pcm_running(substream)) |
| 1732 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); |
| 1733 | } |
| 1734 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1735 | static void snd_pcm_post_resume(struct snd_pcm_substream *substream, |
| 1736 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1737 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1738 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1739 | snd_pcm_trigger_tstamp(substream); |
Takashi Iwai | 9bc889b | 2014-11-06 12:15:25 +0100 | [diff] [blame] | 1740 | runtime->status->state = runtime->status->suspended_state; |
Jie Yang | 90bbaf6 | 2015-10-16 17:57:46 +0800 | [diff] [blame] | 1741 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | } |
| 1743 | |
Julia Lawall | b17154c | 2015-11-29 16:36:40 +0100 | [diff] [blame] | 1744 | static const struct action_ops snd_pcm_action_resume = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1745 | .pre_action = snd_pcm_pre_resume, |
| 1746 | .do_action = snd_pcm_do_resume, |
| 1747 | .undo_action = snd_pcm_undo_resume, |
| 1748 | .post_action = snd_pcm_post_resume |
| 1749 | }; |
| 1750 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1751 | static int snd_pcm_resume(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | { |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1753 | return snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, |
| 1754 | ACTION_ARG_IGNORE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1755 | } |
| 1756 | |
| 1757 | #else |
| 1758 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1759 | static int snd_pcm_resume(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1760 | { |
| 1761 | return -ENOSYS; |
| 1762 | } |
| 1763 | |
| 1764 | #endif /* CONFIG_PM */ |
| 1765 | |
| 1766 | /* |
| 1767 | * xrun ioctl |
| 1768 | * |
| 1769 | * Change the RUNNING stream(s) to XRUN state. |
| 1770 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1771 | static int snd_pcm_xrun(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1773 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1774 | int result; |
| 1775 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1776 | snd_pcm_stream_lock_irq(substream); |
| 1777 | switch (runtime->status->state) { |
| 1778 | case SNDRV_PCM_STATE_XRUN: |
| 1779 | result = 0; /* already there */ |
| 1780 | break; |
| 1781 | case SNDRV_PCM_STATE_RUNNING: |
Takashi Iwai | 9cd641e | 2018-07-04 14:46:27 +0200 | [diff] [blame] | 1782 | __snd_pcm_xrun(substream); |
| 1783 | result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1784 | break; |
| 1785 | default: |
| 1786 | result = -EBADFD; |
| 1787 | } |
| 1788 | snd_pcm_stream_unlock_irq(substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | return result; |
| 1790 | } |
| 1791 | |
| 1792 | /* |
| 1793 | * reset ioctl |
| 1794 | */ |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1795 | /* reset callbacks: state argument ignored */ |
| 1796 | static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, |
| 1797 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1798 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1799 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1800 | switch (runtime->status->state) { |
| 1801 | case SNDRV_PCM_STATE_RUNNING: |
| 1802 | case SNDRV_PCM_STATE_PREPARED: |
| 1803 | case SNDRV_PCM_STATE_PAUSED: |
| 1804 | case SNDRV_PCM_STATE_SUSPENDED: |
| 1805 | return 0; |
| 1806 | default: |
| 1807 | return -EBADFD; |
| 1808 | } |
| 1809 | } |
| 1810 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1811 | static int snd_pcm_do_reset(struct snd_pcm_substream *substream, |
| 1812 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1813 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1814 | struct snd_pcm_runtime *runtime = substream->runtime; |
Takashi Iwai | fc033cb | 2019-11-17 09:53:03 +0100 | [diff] [blame] | 1815 | int err = snd_pcm_ops_ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1816 | if (err < 0) |
| 1817 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1818 | runtime->hw_ptr_base = 0; |
Jaroslav Kysela | e763692 | 2010-01-26 17:08:24 +0100 | [diff] [blame] | 1819 | runtime->hw_ptr_interrupt = runtime->status->hw_ptr - |
| 1820 | runtime->status->hw_ptr % runtime->period_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1821 | runtime->silence_start = runtime->status->hw_ptr; |
| 1822 | runtime->silence_filled = 0; |
| 1823 | return 0; |
| 1824 | } |
| 1825 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1826 | static void snd_pcm_post_reset(struct snd_pcm_substream *substream, |
| 1827 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1828 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1829 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1830 | runtime->control->appl_ptr = runtime->status->hw_ptr; |
| 1831 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
| 1832 | runtime->silence_size > 0) |
| 1833 | snd_pcm_playback_silence(substream, ULONG_MAX); |
| 1834 | } |
| 1835 | |
Julia Lawall | b17154c | 2015-11-29 16:36:40 +0100 | [diff] [blame] | 1836 | static const struct action_ops snd_pcm_action_reset = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1837 | .pre_action = snd_pcm_pre_reset, |
| 1838 | .do_action = snd_pcm_do_reset, |
| 1839 | .post_action = snd_pcm_post_reset |
| 1840 | }; |
| 1841 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1842 | static int snd_pcm_reset(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1843 | { |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1844 | return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, |
| 1845 | ACTION_ARG_IGNORE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1846 | } |
| 1847 | |
| 1848 | /* |
| 1849 | * prepare ioctl |
| 1850 | */ |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1851 | /* pass f_flags as state argument */ |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 1852 | static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1853 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1854 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1855 | struct snd_pcm_runtime *runtime = substream->runtime; |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1856 | int f_flags = (__force int)state; |
| 1857 | |
Takashi Iwai | de1b8b9 | 2006-11-08 15:41:29 +0100 | [diff] [blame] | 1858 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN || |
| 1859 | runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1860 | return -EBADFD; |
| 1861 | if (snd_pcm_running(substream)) |
| 1862 | return -EBUSY; |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 1863 | substream->f_flags = f_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1864 | return 0; |
| 1865 | } |
| 1866 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1867 | static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, |
| 1868 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1869 | { |
| 1870 | int err; |
Takashi Iwai | 29bb274 | 2021-02-06 21:36:53 +0100 | [diff] [blame] | 1871 | snd_pcm_sync_stop(substream, true); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1872 | err = substream->ops->prepare(substream); |
| 1873 | if (err < 0) |
| 1874 | return err; |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1875 | return snd_pcm_do_reset(substream, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1876 | } |
| 1877 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1878 | static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, |
| 1879 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1880 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1881 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1882 | runtime->control->appl_ptr = runtime->status->hw_ptr; |
Takashi Iwai | 9b0573c0 | 2012-10-12 15:07:34 +0200 | [diff] [blame] | 1883 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1884 | } |
| 1885 | |
Julia Lawall | b17154c | 2015-11-29 16:36:40 +0100 | [diff] [blame] | 1886 | static const struct action_ops snd_pcm_action_prepare = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1887 | .pre_action = snd_pcm_pre_prepare, |
| 1888 | .do_action = snd_pcm_do_prepare, |
| 1889 | .post_action = snd_pcm_post_prepare |
| 1890 | }; |
| 1891 | |
| 1892 | /** |
Randy Dunlap | 1c85cc6 | 2008-10-15 14:38:40 -0700 | [diff] [blame] | 1893 | * snd_pcm_prepare - prepare the PCM substream to be triggerable |
Takashi Iwai | df8db93 | 2005-09-07 13:38:19 +0200 | [diff] [blame] | 1894 | * @substream: the PCM substream instance |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 1895 | * @file: file to refer f_flags |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 1896 | * |
| 1897 | * Return: Zero if successful, or a negative error code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1898 | */ |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 1899 | static int snd_pcm_prepare(struct snd_pcm_substream *substream, |
| 1900 | struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1901 | { |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 1902 | int f_flags; |
| 1903 | |
| 1904 | if (file) |
| 1905 | f_flags = file->f_flags; |
| 1906 | else |
| 1907 | f_flags = substream->f_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1908 | |
Takashi Iwai | 1b745cd | 2016-05-24 15:40:03 +0200 | [diff] [blame] | 1909 | snd_pcm_stream_lock_irq(substream); |
| 1910 | switch (substream->runtime->status->state) { |
| 1911 | case SNDRV_PCM_STATE_PAUSED: |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1912 | snd_pcm_pause(substream, false); |
Gustavo A. R. Silva | c0dbbda | 2020-07-08 15:32:36 -0500 | [diff] [blame] | 1913 | fallthrough; |
Takashi Iwai | 1b745cd | 2016-05-24 15:40:03 +0200 | [diff] [blame] | 1914 | case SNDRV_PCM_STATE_SUSPENDED: |
| 1915 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
| 1916 | break; |
| 1917 | } |
| 1918 | snd_pcm_stream_unlock_irq(substream); |
| 1919 | |
Takashi Iwai | 68b4acd | 2016-05-24 15:07:39 +0200 | [diff] [blame] | 1920 | return snd_pcm_action_nonatomic(&snd_pcm_action_prepare, |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1921 | substream, |
| 1922 | (__force snd_pcm_state_t)f_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1923 | } |
| 1924 | |
| 1925 | /* |
| 1926 | * drain ioctl |
| 1927 | */ |
| 1928 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1929 | /* drain init callbacks: state argument ignored */ |
| 1930 | static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, |
| 1931 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1932 | { |
Takashi Iwai | 4f7c39d | 2012-05-21 11:59:57 +0200 | [diff] [blame] | 1933 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 1934 | switch (runtime->status->state) { |
| 1935 | case SNDRV_PCM_STATE_OPEN: |
| 1936 | case SNDRV_PCM_STATE_DISCONNECTED: |
| 1937 | case SNDRV_PCM_STATE_SUSPENDED: |
| 1938 | return -EBADFD; |
| 1939 | } |
| 1940 | runtime->trigger_master = substream; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1941 | return 0; |
| 1942 | } |
| 1943 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1944 | static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, |
| 1945 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1946 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 1947 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1948 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 1949 | switch (runtime->status->state) { |
| 1950 | case SNDRV_PCM_STATE_PREPARED: |
| 1951 | /* start playback stream if possible */ |
| 1952 | if (! snd_pcm_playback_empty(substream)) { |
| 1953 | snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); |
| 1954 | snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); |
Takashi Iwai | 70372a7 | 2014-12-18 10:02:41 +0100 | [diff] [blame] | 1955 | } else { |
| 1956 | runtime->status->state = SNDRV_PCM_STATE_SETUP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1957 | } |
| 1958 | break; |
| 1959 | case SNDRV_PCM_STATE_RUNNING: |
| 1960 | runtime->status->state = SNDRV_PCM_STATE_DRAINING; |
| 1961 | break; |
Takashi Iwai | 4f7c39d | 2012-05-21 11:59:57 +0200 | [diff] [blame] | 1962 | case SNDRV_PCM_STATE_XRUN: |
| 1963 | runtime->status->state = SNDRV_PCM_STATE_SETUP; |
| 1964 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1965 | default: |
| 1966 | break; |
| 1967 | } |
| 1968 | } else { |
| 1969 | /* stop running stream */ |
| 1970 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1971 | snd_pcm_state_t new_state; |
| 1972 | |
| 1973 | new_state = snd_pcm_capture_avail(runtime) > 0 ? |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1974 | SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; |
Marcin Ślusarz | b05e578 | 2007-12-14 12:50:16 +0100 | [diff] [blame] | 1975 | snd_pcm_do_stop(substream, new_state); |
| 1976 | snd_pcm_post_stop(substream, new_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1977 | } |
| 1978 | } |
Libin Yang | 48d8829 | 2014-12-31 22:09:54 +0800 | [diff] [blame] | 1979 | |
| 1980 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING && |
| 1981 | runtime->trigger_master == substream && |
| 1982 | (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER)) |
| 1983 | return substream->ops->trigger(substream, |
| 1984 | SNDRV_PCM_TRIGGER_DRAIN); |
| 1985 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1986 | return 0; |
| 1987 | } |
| 1988 | |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 1989 | static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, |
| 1990 | snd_pcm_state_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1991 | { |
| 1992 | } |
| 1993 | |
Julia Lawall | b17154c | 2015-11-29 16:36:40 +0100 | [diff] [blame] | 1994 | static const struct action_ops snd_pcm_action_drain_init = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1995 | .pre_action = snd_pcm_pre_drain_init, |
| 1996 | .do_action = snd_pcm_do_drain_init, |
| 1997 | .post_action = snd_pcm_post_drain_init |
| 1998 | }; |
| 1999 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2000 | /* |
| 2001 | * Drain the stream(s). |
| 2002 | * When the substream is linked, sync until the draining of all playback streams |
| 2003 | * is finished. |
| 2004 | * After this call, all streams are supposed to be either SETUP or DRAINING |
| 2005 | * (capture only) state. |
| 2006 | */ |
Takashi Iwai | 4cdc115 | 2009-08-20 16:40:16 +0200 | [diff] [blame] | 2007 | static int snd_pcm_drain(struct snd_pcm_substream *substream, |
| 2008 | struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2009 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2010 | struct snd_card *card; |
| 2011 | struct snd_pcm_runtime *runtime; |
Takashi Iwai | ef991b9 | 2007-02-22 12:52:53 +0100 | [diff] [blame] | 2012 | struct snd_pcm_substream *s; |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 2013 | struct snd_pcm_group *group; |
Ingo Molnar | ac6424b | 2017-06-20 12:06:13 +0200 | [diff] [blame] | 2014 | wait_queue_entry_t wait; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2015 | int result = 0; |
Takashi Iwai | 4cdc115 | 2009-08-20 16:40:16 +0200 | [diff] [blame] | 2016 | int nonblock = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2017 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2018 | card = substream->pcm->card; |
| 2019 | runtime = substream->runtime; |
| 2020 | |
| 2021 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| 2022 | return -EBADFD; |
| 2023 | |
Takashi Iwai | 4cdc115 | 2009-08-20 16:40:16 +0200 | [diff] [blame] | 2024 | if (file) { |
| 2025 | if (file->f_flags & O_NONBLOCK) |
| 2026 | nonblock = 1; |
| 2027 | } else if (substream->f_flags & O_NONBLOCK) |
| 2028 | nonblock = 1; |
| 2029 | |
Takashi Iwai | 21cb2a2 | 2005-05-31 14:35:31 +0200 | [diff] [blame] | 2030 | snd_pcm_stream_lock_irq(substream); |
| 2031 | /* resume pause */ |
Takashi Iwai | d3a7dcf | 2009-09-17 18:46:26 +0200 | [diff] [blame] | 2032 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 2033 | snd_pcm_pause(substream, false); |
Takashi Iwai | 21cb2a2 | 2005-05-31 14:35:31 +0200 | [diff] [blame] | 2034 | |
| 2035 | /* pre-start/stop - all running streams are changed to DRAINING state */ |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 2036 | result = snd_pcm_action(&snd_pcm_action_drain_init, substream, |
| 2037 | ACTION_ARG_IGNORE); |
Takashi Iwai | 4cdc115 | 2009-08-20 16:40:16 +0200 | [diff] [blame] | 2038 | if (result < 0) |
| 2039 | goto unlock; |
| 2040 | /* in non-blocking, we don't wait in ioctl but let caller poll */ |
| 2041 | if (nonblock) { |
| 2042 | result = -EAGAIN; |
| 2043 | goto unlock; |
Takashi Iwai | 21cb2a2 | 2005-05-31 14:35:31 +0200 | [diff] [blame] | 2044 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2045 | |
| 2046 | for (;;) { |
| 2047 | long tout; |
Takashi Iwai | d3a7dcf | 2009-09-17 18:46:26 +0200 | [diff] [blame] | 2048 | struct snd_pcm_runtime *to_check; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2049 | if (signal_pending(current)) { |
| 2050 | result = -ERESTARTSYS; |
| 2051 | break; |
| 2052 | } |
Takashi Iwai | d3a7dcf | 2009-09-17 18:46:26 +0200 | [diff] [blame] | 2053 | /* find a substream to drain */ |
| 2054 | to_check = NULL; |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 2055 | group = snd_pcm_stream_group_ref(substream); |
Takashi Iwai | d3a7dcf | 2009-09-17 18:46:26 +0200 | [diff] [blame] | 2056 | snd_pcm_group_for_each_entry(s, substream) { |
| 2057 | if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) |
| 2058 | continue; |
| 2059 | runtime = s->runtime; |
| 2060 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { |
| 2061 | to_check = runtime; |
Takashi Iwai | 21cb2a2 | 2005-05-31 14:35:31 +0200 | [diff] [blame] | 2062 | break; |
Takashi Iwai | d3a7dcf | 2009-09-17 18:46:26 +0200 | [diff] [blame] | 2063 | } |
Takashi Iwai | 21cb2a2 | 2005-05-31 14:35:31 +0200 | [diff] [blame] | 2064 | } |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 2065 | snd_pcm_group_unref(group, substream); |
Takashi Iwai | d3a7dcf | 2009-09-17 18:46:26 +0200 | [diff] [blame] | 2066 | if (!to_check) |
| 2067 | break; /* all drained */ |
| 2068 | init_waitqueue_entry(&wait, current); |
Yuki Tsunashima | 37151a4 | 2019-07-29 17:10:36 +0200 | [diff] [blame] | 2069 | set_current_state(TASK_INTERRUPTIBLE); |
Takashi Iwai | d3a7dcf | 2009-09-17 18:46:26 +0200 | [diff] [blame] | 2070 | add_wait_queue(&to_check->sleep, &wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2071 | snd_pcm_stream_unlock_irq(substream); |
Takashi Iwai | f2b3614 | 2011-05-26 08:09:38 +0200 | [diff] [blame] | 2072 | if (runtime->no_period_wakeup) |
| 2073 | tout = MAX_SCHEDULE_TIMEOUT; |
| 2074 | else { |
| 2075 | tout = 10; |
| 2076 | if (runtime->rate) { |
| 2077 | long t = runtime->period_size * 2 / runtime->rate; |
| 2078 | tout = max(t, tout); |
| 2079 | } |
| 2080 | tout = msecs_to_jiffies(tout * 1000); |
| 2081 | } |
Yuki Tsunashima | 37151a4 | 2019-07-29 17:10:36 +0200 | [diff] [blame] | 2082 | tout = schedule_timeout(tout); |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 2083 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2084 | snd_pcm_stream_lock_irq(substream); |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 2085 | group = snd_pcm_stream_group_ref(substream); |
| 2086 | snd_pcm_group_for_each_entry(s, substream) { |
| 2087 | if (s->runtime == to_check) { |
| 2088 | remove_wait_queue(&to_check->sleep, &wait); |
| 2089 | break; |
| 2090 | } |
| 2091 | } |
| 2092 | snd_pcm_group_unref(group, substream); |
| 2093 | |
Takashi Iwai | 0914f79 | 2012-10-16 16:43:39 +0200 | [diff] [blame] | 2094 | if (card->shutdown) { |
| 2095 | result = -ENODEV; |
| 2096 | break; |
| 2097 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2098 | if (tout == 0) { |
| 2099 | if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) |
| 2100 | result = -ESTRPIPE; |
| 2101 | else { |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 2102 | dev_dbg(substream->pcm->card->dev, |
| 2103 | "playback drain error (DMA or IRQ trouble?)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2104 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
| 2105 | result = -EIO; |
| 2106 | } |
| 2107 | break; |
| 2108 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2109 | } |
Takashi Iwai | 21cb2a2 | 2005-05-31 14:35:31 +0200 | [diff] [blame] | 2110 | |
Takashi Iwai | 4cdc115 | 2009-08-20 16:40:16 +0200 | [diff] [blame] | 2111 | unlock: |
Takashi Iwai | 21cb2a2 | 2005-05-31 14:35:31 +0200 | [diff] [blame] | 2112 | snd_pcm_stream_unlock_irq(substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2113 | |
| 2114 | return result; |
| 2115 | } |
| 2116 | |
| 2117 | /* |
| 2118 | * drop ioctl |
| 2119 | * |
| 2120 | * Immediately put all linked substreams into SETUP state. |
| 2121 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2122 | static int snd_pcm_drop(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2123 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2124 | struct snd_pcm_runtime *runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2125 | int result = 0; |
| 2126 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2127 | if (PCM_RUNTIME_CHECK(substream)) |
| 2128 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2129 | runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2130 | |
Takashi Iwai | de1b8b9 | 2006-11-08 15:41:29 +0100 | [diff] [blame] | 2131 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN || |
Takashi Iwai | 4b95ff7 | 2016-05-24 15:08:31 +0200 | [diff] [blame] | 2132 | runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2133 | return -EBADFD; |
| 2134 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2135 | snd_pcm_stream_lock_irq(substream); |
| 2136 | /* resume pause */ |
| 2137 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 2138 | snd_pcm_pause(substream, false); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2139 | |
| 2140 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
| 2141 | /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ |
| 2142 | snd_pcm_stream_unlock_irq(substream); |
Takashi Iwai | 24e8fc4 | 2008-09-25 17:51:11 +0200 | [diff] [blame] | 2143 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2144 | return result; |
| 2145 | } |
| 2146 | |
| 2147 | |
Al Viro | 0888c32 | 2013-06-05 14:09:55 -0400 | [diff] [blame] | 2148 | static bool is_pcm_file(struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2149 | { |
Al Viro | 0888c32 | 2013-06-05 14:09:55 -0400 | [diff] [blame] | 2150 | struct inode *inode = file_inode(file); |
Takashi Iwai | d819fb21 | 2019-01-13 09:25:42 +0100 | [diff] [blame] | 2151 | struct snd_pcm *pcm; |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 2152 | unsigned int minor; |
| 2153 | |
Al Viro | 0888c32 | 2013-06-05 14:09:55 -0400 | [diff] [blame] | 2154 | if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major) |
| 2155 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2156 | minor = iminor(inode); |
Takashi Iwai | d819fb21 | 2019-01-13 09:25:42 +0100 | [diff] [blame] | 2157 | pcm = snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK); |
| 2158 | if (!pcm) |
| 2159 | pcm = snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE); |
| 2160 | if (!pcm) |
| 2161 | return false; |
| 2162 | snd_card_unref(pcm->card); |
| 2163 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2164 | } |
| 2165 | |
| 2166 | /* |
| 2167 | * PCM link handling |
| 2168 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2169 | static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2170 | { |
| 2171 | int res = 0; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2172 | struct snd_pcm_file *pcm_file; |
| 2173 | struct snd_pcm_substream *substream1; |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 2174 | struct snd_pcm_group *group, *target_group; |
| 2175 | bool nonatomic = substream->pcm->nonatomic; |
Al Viro | 0888c32 | 2013-06-05 14:09:55 -0400 | [diff] [blame] | 2176 | struct fd f = fdget(fd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2177 | |
Al Viro | 0888c32 | 2013-06-05 14:09:55 -0400 | [diff] [blame] | 2178 | if (!f.file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2179 | return -EBADFD; |
Al Viro | 0888c32 | 2013-06-05 14:09:55 -0400 | [diff] [blame] | 2180 | if (!is_pcm_file(f.file)) { |
| 2181 | res = -EBADFD; |
| 2182 | goto _badf; |
| 2183 | } |
| 2184 | pcm_file = f.file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2185 | substream1 = pcm_file->substream; |
Michał Mirosław | 951e2736 | 2020-06-08 18:50:39 +0200 | [diff] [blame] | 2186 | |
| 2187 | if (substream == substream1) { |
| 2188 | res = -EINVAL; |
| 2189 | goto _badf; |
| 2190 | } |
| 2191 | |
Takashi Iwai | 73365cb | 2019-01-13 09:35:17 +0100 | [diff] [blame] | 2192 | group = kzalloc(sizeof(*group), GFP_KERNEL); |
Takashi Iwai | 1662591 | 2012-03-13 15:55:43 +0100 | [diff] [blame] | 2193 | if (!group) { |
| 2194 | res = -ENOMEM; |
| 2195 | goto _nolock; |
| 2196 | } |
Takashi Iwai | 73365cb | 2019-01-13 09:35:17 +0100 | [diff] [blame] | 2197 | snd_pcm_group_init(group); |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 2198 | |
Takashi Iwai | ecb41f0 | 2019-01-22 14:29:51 +0100 | [diff] [blame] | 2199 | down_write(&snd_pcm_link_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2200 | if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || |
Takashi Iwai | 257f8cc | 2014-08-29 15:32:29 +0200 | [diff] [blame] | 2201 | substream->runtime->status->state != substream1->runtime->status->state || |
| 2202 | substream->pcm->nonatomic != substream1->pcm->nonatomic) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2203 | res = -EBADFD; |
| 2204 | goto _end; |
| 2205 | } |
| 2206 | if (snd_pcm_stream_linked(substream1)) { |
| 2207 | res = -EALREADY; |
| 2208 | goto _end; |
| 2209 | } |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 2210 | |
| 2211 | snd_pcm_stream_lock_irq(substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2212 | if (!snd_pcm_stream_linked(substream)) { |
Takashi Iwai | a41c4cb | 2019-01-13 09:40:21 +0100 | [diff] [blame] | 2213 | snd_pcm_group_assign(substream, group); |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 2214 | group = NULL; /* assigned, don't free this one below */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2215 | } |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 2216 | target_group = substream->group; |
| 2217 | snd_pcm_stream_unlock_irq(substream); |
| 2218 | |
| 2219 | snd_pcm_group_lock_irq(target_group, nonatomic); |
Michał Mirosław | e18035c | 2020-06-08 12:06:32 +0200 | [diff] [blame] | 2220 | snd_pcm_stream_lock_nested(substream1); |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 2221 | snd_pcm_group_assign(substream1, target_group); |
Takashi Iwai | 0e279dc | 2019-07-19 10:55:05 +0200 | [diff] [blame] | 2222 | refcount_inc(&target_group->refs); |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 2223 | snd_pcm_stream_unlock(substream1); |
| 2224 | snd_pcm_group_unlock_irq(target_group, nonatomic); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2225 | _end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2226 | up_write(&snd_pcm_link_rwsem); |
Takashi Iwai | 1662591 | 2012-03-13 15:55:43 +0100 | [diff] [blame] | 2227 | _nolock: |
Al Viro | dd6c5cd | 2013-06-05 14:07:08 -0400 | [diff] [blame] | 2228 | kfree(group); |
Al Viro | 0888c32 | 2013-06-05 14:09:55 -0400 | [diff] [blame] | 2229 | _badf: |
| 2230 | fdput(f); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2231 | return res; |
| 2232 | } |
| 2233 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2234 | static void relink_to_local(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2235 | { |
Michał Mirosław | e18035c | 2020-06-08 12:06:32 +0200 | [diff] [blame] | 2236 | snd_pcm_stream_lock_nested(substream); |
Takashi Iwai | a41c4cb | 2019-01-13 09:40:21 +0100 | [diff] [blame] | 2237 | snd_pcm_group_assign(substream, &substream->self_group); |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 2238 | snd_pcm_stream_unlock(substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2239 | } |
| 2240 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2241 | static int snd_pcm_unlink(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2242 | { |
Takashi Iwai | a41c4cb | 2019-01-13 09:40:21 +0100 | [diff] [blame] | 2243 | struct snd_pcm_group *group; |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 2244 | bool nonatomic = substream->pcm->nonatomic; |
| 2245 | bool do_free = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2246 | int res = 0; |
| 2247 | |
Takashi Iwai | ecb41f0 | 2019-01-22 14:29:51 +0100 | [diff] [blame] | 2248 | down_write(&snd_pcm_link_rwsem); |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 2249 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2250 | if (!snd_pcm_stream_linked(substream)) { |
| 2251 | res = -EALREADY; |
| 2252 | goto _end; |
| 2253 | } |
Takashi Iwai | a41c4cb | 2019-01-13 09:40:21 +0100 | [diff] [blame] | 2254 | |
| 2255 | group = substream->group; |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 2256 | snd_pcm_group_lock_irq(group, nonatomic); |
Takashi Iwai | a41c4cb | 2019-01-13 09:40:21 +0100 | [diff] [blame] | 2257 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2258 | relink_to_local(substream); |
Takashi Iwai | 0e279dc | 2019-07-19 10:55:05 +0200 | [diff] [blame] | 2259 | refcount_dec(&group->refs); |
Takashi Iwai | a41c4cb | 2019-01-13 09:40:21 +0100 | [diff] [blame] | 2260 | |
| 2261 | /* detach the last stream, too */ |
| 2262 | if (list_is_singular(&group->substreams)) { |
Takashi Iwai | 7df5a5f | 2019-01-13 10:19:32 +0100 | [diff] [blame] | 2263 | relink_to_local(list_first_entry(&group->substreams, |
| 2264 | struct snd_pcm_substream, |
| 2265 | link_list)); |
Takashi Iwai | 0e279dc | 2019-07-19 10:55:05 +0200 | [diff] [blame] | 2266 | do_free = refcount_dec_and_test(&group->refs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2267 | } |
Takashi Iwai | a41c4cb | 2019-01-13 09:40:21 +0100 | [diff] [blame] | 2268 | |
Takashi Iwai | f57f3df | 2019-01-13 09:50:33 +0100 | [diff] [blame] | 2269 | snd_pcm_group_unlock_irq(group, nonatomic); |
| 2270 | if (do_free) |
| 2271 | kfree(group); |
| 2272 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2273 | _end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2274 | up_write(&snd_pcm_link_rwsem); |
| 2275 | return res; |
| 2276 | } |
| 2277 | |
| 2278 | /* |
| 2279 | * hw configurator |
| 2280 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2281 | static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, |
| 2282 | struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2283 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2284 | struct snd_interval t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2285 | snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), |
| 2286 | hw_param_interval_c(params, rule->deps[1]), &t); |
| 2287 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); |
| 2288 | } |
| 2289 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2290 | static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, |
| 2291 | struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2292 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2293 | struct snd_interval t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2294 | snd_interval_div(hw_param_interval_c(params, rule->deps[0]), |
| 2295 | hw_param_interval_c(params, rule->deps[1]), &t); |
| 2296 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); |
| 2297 | } |
| 2298 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2299 | static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, |
| 2300 | struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2301 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2302 | struct snd_interval t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2303 | snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), |
| 2304 | hw_param_interval_c(params, rule->deps[1]), |
| 2305 | (unsigned long) rule->private, &t); |
| 2306 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); |
| 2307 | } |
| 2308 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2309 | static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, |
| 2310 | struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2311 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2312 | struct snd_interval t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2313 | snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), |
| 2314 | (unsigned long) rule->private, |
| 2315 | hw_param_interval_c(params, rule->deps[1]), &t); |
| 2316 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); |
| 2317 | } |
| 2318 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2319 | static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, |
| 2320 | struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2321 | { |
Takashi Iwai | ba71d22 | 2020-02-06 17:39:42 +0100 | [diff] [blame] | 2322 | snd_pcm_format_t k; |
Takashi Sakamoto | b55f9fd | 2017-05-17 08:48:20 +0900 | [diff] [blame] | 2323 | const struct snd_interval *i = |
| 2324 | hw_param_interval_c(params, rule->deps[0]); |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2325 | struct snd_mask m; |
| 2326 | struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2327 | snd_mask_any(&m); |
Takashi Iwai | ba71d22 | 2020-02-06 17:39:42 +0100 | [diff] [blame] | 2328 | pcm_for_each_format(k) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2329 | int bits; |
Takashi Iwai | ba71d22 | 2020-02-06 17:39:42 +0100 | [diff] [blame] | 2330 | if (!snd_mask_test_format(mask, k)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2331 | continue; |
| 2332 | bits = snd_pcm_format_physical_width(k); |
| 2333 | if (bits <= 0) |
| 2334 | continue; /* ignore invalid formats */ |
| 2335 | if ((unsigned)bits < i->min || (unsigned)bits > i->max) |
Takashi Iwai | ba71d22 | 2020-02-06 17:39:42 +0100 | [diff] [blame] | 2336 | snd_mask_reset(&m, (__force unsigned)k); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2337 | } |
| 2338 | return snd_mask_refine(mask, &m); |
| 2339 | } |
| 2340 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2341 | static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, |
| 2342 | struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2343 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2344 | struct snd_interval t; |
Takashi Iwai | ba71d22 | 2020-02-06 17:39:42 +0100 | [diff] [blame] | 2345 | snd_pcm_format_t k; |
| 2346 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2347 | t.min = UINT_MAX; |
| 2348 | t.max = 0; |
| 2349 | t.openmin = 0; |
| 2350 | t.openmax = 0; |
Takashi Iwai | ba71d22 | 2020-02-06 17:39:42 +0100 | [diff] [blame] | 2351 | pcm_for_each_format(k) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2352 | int bits; |
Takashi Iwai | ba71d22 | 2020-02-06 17:39:42 +0100 | [diff] [blame] | 2353 | if (!snd_mask_test_format(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2354 | continue; |
| 2355 | bits = snd_pcm_format_physical_width(k); |
| 2356 | if (bits <= 0) |
| 2357 | continue; /* ignore invalid formats */ |
| 2358 | if (t.min > (unsigned)bits) |
| 2359 | t.min = bits; |
| 2360 | if (t.max < (unsigned)bits) |
| 2361 | t.max = bits; |
| 2362 | } |
| 2363 | t.integer = 1; |
| 2364 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); |
| 2365 | } |
| 2366 | |
| 2367 | #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 |
| 2368 | #error "Change this table" |
| 2369 | #endif |
| 2370 | |
Takashi Sakamoto | 8b67430 | 2017-05-17 08:48:17 +0900 | [diff] [blame] | 2371 | static const unsigned int rates[] = { |
| 2372 | 5512, 8000, 11025, 16000, 22050, 32000, 44100, |
Vidyakumar Athota | 4cc4531 | 2019-08-22 10:56:50 +0100 | [diff] [blame] | 2373 | 48000, 64000, 88200, 96000, 176400, 192000, 352800, 384000 |
Takashi Sakamoto | 8b67430 | 2017-05-17 08:48:17 +0900 | [diff] [blame] | 2374 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2375 | |
Clemens Ladisch | 7653d55 | 2007-08-13 17:38:54 +0200 | [diff] [blame] | 2376 | const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { |
| 2377 | .count = ARRAY_SIZE(rates), |
| 2378 | .list = rates, |
| 2379 | }; |
| 2380 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2381 | static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, |
| 2382 | struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2383 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2384 | struct snd_pcm_hardware *hw = rule->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2385 | return snd_interval_list(hw_param_interval(params, rule->var), |
Clemens Ladisch | 7653d55 | 2007-08-13 17:38:54 +0200 | [diff] [blame] | 2386 | snd_pcm_known_rates.count, |
| 2387 | snd_pcm_known_rates.list, hw->rates); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2388 | } |
| 2389 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2390 | static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, |
| 2391 | struct snd_pcm_hw_rule *rule) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2392 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2393 | struct snd_interval t; |
| 2394 | struct snd_pcm_substream *substream = rule->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2395 | t.min = 0; |
| 2396 | t.max = substream->buffer_bytes_max; |
| 2397 | t.openmin = 0; |
| 2398 | t.openmax = 0; |
| 2399 | t.integer = 1; |
| 2400 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); |
| 2401 | } |
| 2402 | |
Takashi Iwai | d662117 | 2020-01-16 17:28:25 +0100 | [diff] [blame] | 2403 | static int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2404 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2405 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 2406 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2407 | int k, err; |
| 2408 | |
| 2409 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { |
| 2410 | snd_mask_any(constrs_mask(constrs, k)); |
| 2411 | } |
| 2412 | |
| 2413 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { |
| 2414 | snd_interval_any(constrs_interval(constrs, k)); |
| 2415 | } |
| 2416 | |
| 2417 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); |
| 2418 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); |
| 2419 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); |
| 2420 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); |
| 2421 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); |
| 2422 | |
| 2423 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, |
| 2424 | snd_pcm_hw_rule_format, NULL, |
| 2425 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); |
| 2426 | if (err < 0) |
| 2427 | return err; |
| 2428 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, |
| 2429 | snd_pcm_hw_rule_sample_bits, NULL, |
| 2430 | SNDRV_PCM_HW_PARAM_FORMAT, |
| 2431 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); |
| 2432 | if (err < 0) |
| 2433 | return err; |
| 2434 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, |
| 2435 | snd_pcm_hw_rule_div, NULL, |
| 2436 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); |
| 2437 | if (err < 0) |
| 2438 | return err; |
| 2439 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, |
| 2440 | snd_pcm_hw_rule_mul, NULL, |
| 2441 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); |
| 2442 | if (err < 0) |
| 2443 | return err; |
| 2444 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, |
| 2445 | snd_pcm_hw_rule_mulkdiv, (void*) 8, |
| 2446 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); |
| 2447 | if (err < 0) |
| 2448 | return err; |
| 2449 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, |
| 2450 | snd_pcm_hw_rule_mulkdiv, (void*) 8, |
| 2451 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); |
| 2452 | if (err < 0) |
| 2453 | return err; |
| 2454 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, |
| 2455 | snd_pcm_hw_rule_div, NULL, |
| 2456 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); |
| 2457 | if (err < 0) |
| 2458 | return err; |
| 2459 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, |
| 2460 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, |
| 2461 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); |
| 2462 | if (err < 0) |
| 2463 | return err; |
| 2464 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, |
| 2465 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, |
| 2466 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); |
| 2467 | if (err < 0) |
| 2468 | return err; |
| 2469 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, |
| 2470 | snd_pcm_hw_rule_div, NULL, |
| 2471 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); |
| 2472 | if (err < 0) |
| 2473 | return err; |
| 2474 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, |
| 2475 | snd_pcm_hw_rule_div, NULL, |
| 2476 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); |
| 2477 | if (err < 0) |
| 2478 | return err; |
| 2479 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, |
| 2480 | snd_pcm_hw_rule_mulkdiv, (void*) 8, |
| 2481 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); |
| 2482 | if (err < 0) |
| 2483 | return err; |
| 2484 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, |
| 2485 | snd_pcm_hw_rule_muldivk, (void*) 1000000, |
| 2486 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); |
| 2487 | if (err < 0) |
| 2488 | return err; |
| 2489 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, |
| 2490 | snd_pcm_hw_rule_mul, NULL, |
| 2491 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); |
| 2492 | if (err < 0) |
| 2493 | return err; |
| 2494 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, |
| 2495 | snd_pcm_hw_rule_mulkdiv, (void*) 8, |
| 2496 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); |
| 2497 | if (err < 0) |
| 2498 | return err; |
| 2499 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, |
| 2500 | snd_pcm_hw_rule_muldivk, (void*) 1000000, |
| 2501 | SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); |
| 2502 | if (err < 0) |
| 2503 | return err; |
| 2504 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, |
| 2505 | snd_pcm_hw_rule_muldivk, (void*) 8, |
| 2506 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); |
| 2507 | if (err < 0) |
| 2508 | return err; |
| 2509 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, |
| 2510 | snd_pcm_hw_rule_muldivk, (void*) 8, |
| 2511 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); |
| 2512 | if (err < 0) |
| 2513 | return err; |
| 2514 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, |
| 2515 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, |
| 2516 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); |
| 2517 | if (err < 0) |
| 2518 | return err; |
| 2519 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, |
| 2520 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, |
| 2521 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); |
| 2522 | if (err < 0) |
| 2523 | return err; |
| 2524 | return 0; |
| 2525 | } |
| 2526 | |
Takashi Iwai | d662117 | 2020-01-16 17:28:25 +0100 | [diff] [blame] | 2527 | static int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2528 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2529 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 2530 | struct snd_pcm_hardware *hw = &runtime->hw; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2531 | int err; |
| 2532 | unsigned int mask = 0; |
| 2533 | |
| 2534 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) |
Takashi Iwai | f9b0c05 | 2020-02-06 17:39:43 +0100 | [diff] [blame] | 2535 | mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_RW_INTERLEAVED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2536 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) |
Takashi Iwai | f9b0c05 | 2020-02-06 17:39:43 +0100 | [diff] [blame] | 2537 | mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); |
Takashi Iwai | 63825f3 | 2014-10-22 12:04:46 +0200 | [diff] [blame] | 2538 | if (hw_support_mmap(substream)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2539 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) |
Takashi Iwai | f9b0c05 | 2020-02-06 17:39:43 +0100 | [diff] [blame] | 2540 | mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2541 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) |
Takashi Iwai | f9b0c05 | 2020-02-06 17:39:43 +0100 | [diff] [blame] | 2542 | mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2543 | if (hw->info & SNDRV_PCM_INFO_COMPLEX) |
Takashi Iwai | f9b0c05 | 2020-02-06 17:39:43 +0100 | [diff] [blame] | 2544 | mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_MMAP_COMPLEX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2545 | } |
| 2546 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2547 | if (err < 0) |
| 2548 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2549 | |
| 2550 | err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2551 | if (err < 0) |
| 2552 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2553 | |
Takashi Iwai | f9b0c05 | 2020-02-06 17:39:43 +0100 | [diff] [blame] | 2554 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, |
| 2555 | PARAM_MASK_BIT(SNDRV_PCM_SUBFORMAT_STD)); |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2556 | if (err < 0) |
| 2557 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2558 | |
| 2559 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, |
| 2560 | hw->channels_min, hw->channels_max); |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2561 | if (err < 0) |
| 2562 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2563 | |
| 2564 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, |
| 2565 | hw->rate_min, hw->rate_max); |
Guennadi Liakhovetski | 8b90ca0 | 2009-12-24 01:17:46 +0100 | [diff] [blame] | 2566 | if (err < 0) |
| 2567 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2568 | |
| 2569 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, |
| 2570 | hw->period_bytes_min, hw->period_bytes_max); |
Guennadi Liakhovetski | 8b90ca0 | 2009-12-24 01:17:46 +0100 | [diff] [blame] | 2571 | if (err < 0) |
| 2572 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2573 | |
| 2574 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, |
| 2575 | hw->periods_min, hw->periods_max); |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2576 | if (err < 0) |
| 2577 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2578 | |
| 2579 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, |
| 2580 | hw->period_bytes_min, hw->buffer_bytes_max); |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2581 | if (err < 0) |
| 2582 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2583 | |
| 2584 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, |
| 2585 | snd_pcm_hw_rule_buffer_bytes_max, substream, |
| 2586 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); |
| 2587 | if (err < 0) |
| 2588 | return err; |
| 2589 | |
| 2590 | /* FIXME: remove */ |
| 2591 | if (runtime->dma_bytes) { |
| 2592 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2593 | if (err < 0) |
Sachin Kamat | 6cf9515 | 2012-11-21 14:36:55 +0530 | [diff] [blame] | 2594 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2595 | } |
| 2596 | |
| 2597 | if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { |
| 2598 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, |
| 2599 | snd_pcm_hw_rule_rate, hw, |
| 2600 | SNDRV_PCM_HW_PARAM_RATE, -1); |
| 2601 | if (err < 0) |
| 2602 | return err; |
| 2603 | } |
| 2604 | |
| 2605 | /* FIXME: this belong to lowlevel */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2606 | snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); |
| 2607 | |
| 2608 | return 0; |
| 2609 | } |
| 2610 | |
Takashi Iwai | 3bf75f9b | 2006-03-27 16:40:49 +0200 | [diff] [blame] | 2611 | static void pcm_release_private(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2612 | { |
Takashi Iwai | b51abed | 2018-11-29 08:02:49 +0100 | [diff] [blame] | 2613 | if (snd_pcm_stream_linked(substream)) |
| 2614 | snd_pcm_unlink(substream); |
Takashi Iwai | 3bf75f9b | 2006-03-27 16:40:49 +0200 | [diff] [blame] | 2615 | } |
| 2616 | |
| 2617 | void snd_pcm_release_substream(struct snd_pcm_substream *substream) |
| 2618 | { |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 2619 | substream->ref_count--; |
| 2620 | if (substream->ref_count > 0) |
| 2621 | return; |
| 2622 | |
Takashi Iwai | 3bf75f9b | 2006-03-27 16:40:49 +0200 | [diff] [blame] | 2623 | snd_pcm_drop(substream); |
Takashi Iwai | 3bf75f9b | 2006-03-27 16:40:49 +0200 | [diff] [blame] | 2624 | if (substream->hw_opened) { |
Takashi Iwai | 0fbb027 | 2020-02-13 07:03:49 +0100 | [diff] [blame] | 2625 | if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) |
| 2626 | do_hw_free(substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2627 | substream->ops->close(substream); |
Takashi Iwai | 3bf75f9b | 2006-03-27 16:40:49 +0200 | [diff] [blame] | 2628 | substream->hw_opened = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2629 | } |
Rafael J. Wysocki | 5371a79 | 2020-02-12 00:34:15 +0100 | [diff] [blame] | 2630 | if (cpu_latency_qos_request_active(&substream->latency_pm_qos_req)) |
| 2631 | cpu_latency_qos_remove_request(&substream->latency_pm_qos_req); |
Takashi Iwai | 1576274 | 2006-04-06 19:47:42 +0200 | [diff] [blame] | 2632 | if (substream->pcm_release) { |
| 2633 | substream->pcm_release(substream); |
| 2634 | substream->pcm_release = NULL; |
| 2635 | } |
Takashi Iwai | 3bf75f9b | 2006-03-27 16:40:49 +0200 | [diff] [blame] | 2636 | snd_pcm_detach_substream(substream); |
| 2637 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 2638 | EXPORT_SYMBOL(snd_pcm_release_substream); |
| 2639 | |
Takashi Iwai | 3bf75f9b | 2006-03-27 16:40:49 +0200 | [diff] [blame] | 2640 | int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, |
| 2641 | struct file *file, |
| 2642 | struct snd_pcm_substream **rsubstream) |
| 2643 | { |
| 2644 | struct snd_pcm_substream *substream; |
| 2645 | int err; |
| 2646 | |
| 2647 | err = snd_pcm_attach_substream(pcm, stream, file, &substream); |
| 2648 | if (err < 0) |
| 2649 | return err; |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 2650 | if (substream->ref_count > 1) { |
| 2651 | *rsubstream = substream; |
| 2652 | return 0; |
| 2653 | } |
| 2654 | |
Takashi Iwai | 3bf75f9b | 2006-03-27 16:40:49 +0200 | [diff] [blame] | 2655 | err = snd_pcm_hw_constraints_init(substream); |
| 2656 | if (err < 0) { |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 2657 | pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n"); |
Takashi Iwai | 3bf75f9b | 2006-03-27 16:40:49 +0200 | [diff] [blame] | 2658 | goto error; |
| 2659 | } |
| 2660 | |
| 2661 | if ((err = substream->ops->open(substream)) < 0) |
| 2662 | goto error; |
| 2663 | |
| 2664 | substream->hw_opened = 1; |
| 2665 | |
| 2666 | err = snd_pcm_hw_constraints_complete(substream); |
| 2667 | if (err < 0) { |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 2668 | pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n"); |
Takashi Iwai | 3bf75f9b | 2006-03-27 16:40:49 +0200 | [diff] [blame] | 2669 | goto error; |
| 2670 | } |
| 2671 | |
| 2672 | *rsubstream = substream; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2673 | return 0; |
Takashi Iwai | 3bf75f9b | 2006-03-27 16:40:49 +0200 | [diff] [blame] | 2674 | |
| 2675 | error: |
| 2676 | snd_pcm_release_substream(substream); |
| 2677 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2678 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 2679 | EXPORT_SYMBOL(snd_pcm_open_substream); |
| 2680 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2681 | static int snd_pcm_open_file(struct file *file, |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2682 | struct snd_pcm *pcm, |
Feng Tang | ffd3d5c6 | 2011-10-10 10:31:48 +0800 | [diff] [blame] | 2683 | int stream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2684 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2685 | struct snd_pcm_file *pcm_file; |
| 2686 | struct snd_pcm_substream *substream; |
Takashi Iwai | 3bf75f9b | 2006-03-27 16:40:49 +0200 | [diff] [blame] | 2687 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2688 | |
Takashi Iwai | 3bf75f9b | 2006-03-27 16:40:49 +0200 | [diff] [blame] | 2689 | err = snd_pcm_open_substream(pcm, stream, file, &substream); |
| 2690 | if (err < 0) |
| 2691 | return err; |
| 2692 | |
Takashi Iwai | 548a648 | 2006-07-31 16:51:51 +0200 | [diff] [blame] | 2693 | pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); |
| 2694 | if (pcm_file == NULL) { |
| 2695 | snd_pcm_release_substream(substream); |
| 2696 | return -ENOMEM; |
| 2697 | } |
| 2698 | pcm_file->substream = substream; |
Takashi Iwai | de89750 | 2019-01-23 12:47:34 +0100 | [diff] [blame] | 2699 | if (substream->ref_count == 1) |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 2700 | substream->pcm_release = pcm_release_private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2701 | file->private_data = pcm_file; |
Feng Tang | ffd3d5c6 | 2011-10-10 10:31:48 +0800 | [diff] [blame] | 2702 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2703 | return 0; |
| 2704 | } |
| 2705 | |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 2706 | static int snd_pcm_playback_open(struct inode *inode, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2707 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2708 | struct snd_pcm *pcm; |
Takashi Iwai | 02f4865 | 2010-04-13 11:49:04 +0200 | [diff] [blame] | 2709 | int err = nonseekable_open(inode, file); |
| 2710 | if (err < 0) |
| 2711 | return err; |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 2712 | pcm = snd_lookup_minor_data(iminor(inode), |
| 2713 | SNDRV_DEVICE_TYPE_PCM_PLAYBACK); |
Takashi Iwai | a0830db | 2012-10-16 13:05:59 +0200 | [diff] [blame] | 2714 | err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); |
Takashi Iwai | 8bb4d9c | 2012-11-08 14:36:18 +0100 | [diff] [blame] | 2715 | if (pcm) |
| 2716 | snd_card_unref(pcm->card); |
Takashi Iwai | a0830db | 2012-10-16 13:05:59 +0200 | [diff] [blame] | 2717 | return err; |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 2718 | } |
| 2719 | |
| 2720 | static int snd_pcm_capture_open(struct inode *inode, struct file *file) |
| 2721 | { |
| 2722 | struct snd_pcm *pcm; |
Takashi Iwai | 02f4865 | 2010-04-13 11:49:04 +0200 | [diff] [blame] | 2723 | int err = nonseekable_open(inode, file); |
| 2724 | if (err < 0) |
| 2725 | return err; |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 2726 | pcm = snd_lookup_minor_data(iminor(inode), |
| 2727 | SNDRV_DEVICE_TYPE_PCM_CAPTURE); |
Takashi Iwai | a0830db | 2012-10-16 13:05:59 +0200 | [diff] [blame] | 2728 | err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); |
Takashi Iwai | 8bb4d9c | 2012-11-08 14:36:18 +0100 | [diff] [blame] | 2729 | if (pcm) |
| 2730 | snd_card_unref(pcm->card); |
Takashi Iwai | a0830db | 2012-10-16 13:05:59 +0200 | [diff] [blame] | 2731 | return err; |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 2732 | } |
| 2733 | |
| 2734 | static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) |
| 2735 | { |
| 2736 | int err; |
Ingo Molnar | ac6424b | 2017-06-20 12:06:13 +0200 | [diff] [blame] | 2737 | wait_queue_entry_t wait; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2738 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2739 | if (pcm == NULL) { |
| 2740 | err = -ENODEV; |
| 2741 | goto __error1; |
| 2742 | } |
| 2743 | err = snd_card_file_add(pcm->card, file); |
| 2744 | if (err < 0) |
| 2745 | goto __error1; |
| 2746 | if (!try_module_get(pcm->card->module)) { |
| 2747 | err = -EFAULT; |
| 2748 | goto __error2; |
| 2749 | } |
| 2750 | init_waitqueue_entry(&wait, current); |
| 2751 | add_wait_queue(&pcm->open_wait, &wait); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 2752 | mutex_lock(&pcm->open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2753 | while (1) { |
Feng Tang | ffd3d5c6 | 2011-10-10 10:31:48 +0800 | [diff] [blame] | 2754 | err = snd_pcm_open_file(file, pcm, stream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2755 | if (err >= 0) |
| 2756 | break; |
| 2757 | if (err == -EAGAIN) { |
| 2758 | if (file->f_flags & O_NONBLOCK) { |
| 2759 | err = -EBUSY; |
| 2760 | break; |
| 2761 | } |
| 2762 | } else |
| 2763 | break; |
| 2764 | set_current_state(TASK_INTERRUPTIBLE); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 2765 | mutex_unlock(&pcm->open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2766 | schedule(); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 2767 | mutex_lock(&pcm->open_mutex); |
Takashi Iwai | 0914f79 | 2012-10-16 16:43:39 +0200 | [diff] [blame] | 2768 | if (pcm->card->shutdown) { |
| 2769 | err = -ENODEV; |
| 2770 | break; |
| 2771 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2772 | if (signal_pending(current)) { |
| 2773 | err = -ERESTARTSYS; |
| 2774 | break; |
| 2775 | } |
| 2776 | } |
| 2777 | remove_wait_queue(&pcm->open_wait, &wait); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 2778 | mutex_unlock(&pcm->open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2779 | if (err < 0) |
| 2780 | goto __error; |
| 2781 | return err; |
| 2782 | |
| 2783 | __error: |
| 2784 | module_put(pcm->card->module); |
| 2785 | __error2: |
| 2786 | snd_card_file_remove(pcm->card, file); |
| 2787 | __error1: |
| 2788 | return err; |
| 2789 | } |
| 2790 | |
| 2791 | static int snd_pcm_release(struct inode *inode, struct file *file) |
| 2792 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2793 | struct snd_pcm *pcm; |
| 2794 | struct snd_pcm_substream *substream; |
| 2795 | struct snd_pcm_file *pcm_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2796 | |
| 2797 | pcm_file = file->private_data; |
| 2798 | substream = pcm_file->substream; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 2799 | if (snd_BUG_ON(!substream)) |
| 2800 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2801 | pcm = substream->pcm; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 2802 | mutex_lock(&pcm->open_mutex); |
Takashi Iwai | 3bf75f9b | 2006-03-27 16:40:49 +0200 | [diff] [blame] | 2803 | snd_pcm_release_substream(substream); |
Takashi Iwai | 548a648 | 2006-07-31 16:51:51 +0200 | [diff] [blame] | 2804 | kfree(pcm_file); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 2805 | mutex_unlock(&pcm->open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2806 | wake_up(&pcm->open_wait); |
| 2807 | module_put(pcm->card->module); |
| 2808 | snd_card_file_remove(pcm->card, file); |
| 2809 | return 0; |
| 2810 | } |
| 2811 | |
Takashi Iwai | f839cc1 | 2017-05-19 20:04:23 +0200 | [diff] [blame] | 2812 | /* check and update PCM state; return 0 or a negative error |
| 2813 | * call this inside PCM lock |
| 2814 | */ |
| 2815 | static int do_pcm_hwsync(struct snd_pcm_substream *substream) |
| 2816 | { |
| 2817 | switch (substream->runtime->status->state) { |
| 2818 | case SNDRV_PCM_STATE_DRAINING: |
| 2819 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) |
| 2820 | return -EBADFD; |
Gustavo A. R. Silva | c0dbbda | 2020-07-08 15:32:36 -0500 | [diff] [blame] | 2821 | fallthrough; |
Takashi Iwai | f839cc1 | 2017-05-19 20:04:23 +0200 | [diff] [blame] | 2822 | case SNDRV_PCM_STATE_RUNNING: |
| 2823 | return snd_pcm_update_hw_ptr(substream); |
| 2824 | case SNDRV_PCM_STATE_PREPARED: |
| 2825 | case SNDRV_PCM_STATE_PAUSED: |
| 2826 | return 0; |
| 2827 | case SNDRV_PCM_STATE_SUSPENDED: |
| 2828 | return -ESTRPIPE; |
| 2829 | case SNDRV_PCM_STATE_XRUN: |
| 2830 | return -EPIPE; |
| 2831 | default: |
| 2832 | return -EBADFD; |
| 2833 | } |
| 2834 | } |
| 2835 | |
Takashi Iwai | 9027c46 | 2017-05-19 20:22:33 +0200 | [diff] [blame] | 2836 | /* increase the appl_ptr; returns the processed frames or a negative error */ |
Takashi Iwai | e0327a0 | 2017-05-19 20:16:44 +0200 | [diff] [blame] | 2837 | static snd_pcm_sframes_t forward_appl_ptr(struct snd_pcm_substream *substream, |
| 2838 | snd_pcm_uframes_t frames, |
| 2839 | snd_pcm_sframes_t avail) |
| 2840 | { |
| 2841 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 2842 | snd_pcm_sframes_t appl_ptr; |
Takashi Iwai | 9027c46 | 2017-05-19 20:22:33 +0200 | [diff] [blame] | 2843 | int ret; |
Takashi Iwai | e0327a0 | 2017-05-19 20:16:44 +0200 | [diff] [blame] | 2844 | |
| 2845 | if (avail <= 0) |
| 2846 | return 0; |
| 2847 | if (frames > (snd_pcm_uframes_t)avail) |
| 2848 | frames = avail; |
| 2849 | appl_ptr = runtime->control->appl_ptr + frames; |
| 2850 | if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) |
| 2851 | appl_ptr -= runtime->boundary; |
Takashi Sakamoto | 66e01a5 | 2017-06-12 09:41:44 +0900 | [diff] [blame] | 2852 | ret = pcm_lib_apply_appl_ptr(substream, appl_ptr); |
Takashi Iwai | 9027c46 | 2017-05-19 20:22:33 +0200 | [diff] [blame] | 2853 | return ret < 0 ? ret : frames; |
Takashi Iwai | e0327a0 | 2017-05-19 20:16:44 +0200 | [diff] [blame] | 2854 | } |
| 2855 | |
Takashi Iwai | fb51f1c | 2018-01-03 15:16:30 +0100 | [diff] [blame] | 2856 | /* decrease the appl_ptr; returns the processed frames or zero for error */ |
Takashi Iwai | e0327a0 | 2017-05-19 20:16:44 +0200 | [diff] [blame] | 2857 | static snd_pcm_sframes_t rewind_appl_ptr(struct snd_pcm_substream *substream, |
| 2858 | snd_pcm_uframes_t frames, |
| 2859 | snd_pcm_sframes_t avail) |
| 2860 | { |
| 2861 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 2862 | snd_pcm_sframes_t appl_ptr; |
Takashi Iwai | 9027c46 | 2017-05-19 20:22:33 +0200 | [diff] [blame] | 2863 | int ret; |
Takashi Iwai | e0327a0 | 2017-05-19 20:16:44 +0200 | [diff] [blame] | 2864 | |
| 2865 | if (avail <= 0) |
| 2866 | return 0; |
| 2867 | if (frames > (snd_pcm_uframes_t)avail) |
| 2868 | frames = avail; |
| 2869 | appl_ptr = runtime->control->appl_ptr - frames; |
| 2870 | if (appl_ptr < 0) |
| 2871 | appl_ptr += runtime->boundary; |
Takashi Sakamoto | 66e01a5 | 2017-06-12 09:41:44 +0900 | [diff] [blame] | 2872 | ret = pcm_lib_apply_appl_ptr(substream, appl_ptr); |
Takashi Iwai | fb51f1c | 2018-01-03 15:16:30 +0100 | [diff] [blame] | 2873 | /* NOTE: we return zero for errors because PulseAudio gets depressed |
| 2874 | * upon receiving an error from rewind ioctl and stops processing |
| 2875 | * any longer. Returning zero means that no rewind is done, so |
| 2876 | * it's not absolutely wrong to answer like that. |
| 2877 | */ |
| 2878 | return ret < 0 ? 0 : frames; |
Takashi Iwai | e0327a0 | 2017-05-19 20:16:44 +0200 | [diff] [blame] | 2879 | } |
| 2880 | |
Takashi Iwai | 763e506 | 2018-04-11 17:56:52 +0200 | [diff] [blame] | 2881 | static snd_pcm_sframes_t snd_pcm_rewind(struct snd_pcm_substream *substream, |
| 2882 | snd_pcm_uframes_t frames) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2883 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2884 | snd_pcm_sframes_t ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2885 | |
| 2886 | if (frames == 0) |
| 2887 | return 0; |
| 2888 | |
| 2889 | snd_pcm_stream_lock_irq(substream); |
Takashi Iwai | f839cc1 | 2017-05-19 20:04:23 +0200 | [diff] [blame] | 2890 | ret = do_pcm_hwsync(substream); |
Takashi Iwai | e0327a0 | 2017-05-19 20:16:44 +0200 | [diff] [blame] | 2891 | if (!ret) |
| 2892 | ret = rewind_appl_ptr(substream, frames, |
Takashi Iwai | 763e506 | 2018-04-11 17:56:52 +0200 | [diff] [blame] | 2893 | snd_pcm_hw_avail(substream)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2894 | snd_pcm_stream_unlock_irq(substream); |
| 2895 | return ret; |
| 2896 | } |
| 2897 | |
Takashi Iwai | 763e506 | 2018-04-11 17:56:52 +0200 | [diff] [blame] | 2898 | static snd_pcm_sframes_t snd_pcm_forward(struct snd_pcm_substream *substream, |
| 2899 | snd_pcm_uframes_t frames) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2900 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2901 | snd_pcm_sframes_t ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2902 | |
| 2903 | if (frames == 0) |
| 2904 | return 0; |
| 2905 | |
| 2906 | snd_pcm_stream_lock_irq(substream); |
Takashi Iwai | f839cc1 | 2017-05-19 20:04:23 +0200 | [diff] [blame] | 2907 | ret = do_pcm_hwsync(substream); |
Takashi Iwai | e0327a0 | 2017-05-19 20:16:44 +0200 | [diff] [blame] | 2908 | if (!ret) |
| 2909 | ret = forward_appl_ptr(substream, frames, |
Takashi Iwai | 763e506 | 2018-04-11 17:56:52 +0200 | [diff] [blame] | 2910 | snd_pcm_avail(substream)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2911 | snd_pcm_stream_unlock_irq(substream); |
| 2912 | return ret; |
| 2913 | } |
| 2914 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2915 | static int snd_pcm_hwsync(struct snd_pcm_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2916 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2917 | int err; |
| 2918 | |
| 2919 | snd_pcm_stream_lock_irq(substream); |
Takashi Iwai | f839cc1 | 2017-05-19 20:04:23 +0200 | [diff] [blame] | 2920 | err = do_pcm_hwsync(substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2921 | snd_pcm_stream_unlock_irq(substream); |
| 2922 | return err; |
| 2923 | } |
| 2924 | |
Jeffery Miller | 912e4c3 | 2018-04-20 23:20:46 -0500 | [diff] [blame] | 2925 | static int snd_pcm_delay(struct snd_pcm_substream *substream, |
| 2926 | snd_pcm_sframes_t *delay) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2927 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2928 | int err; |
| 2929 | snd_pcm_sframes_t n = 0; |
| 2930 | |
| 2931 | snd_pcm_stream_lock_irq(substream); |
Takashi Iwai | f839cc1 | 2017-05-19 20:04:23 +0200 | [diff] [blame] | 2932 | err = do_pcm_hwsync(substream); |
Takashi Iwai | c99c5a3 | 2018-04-11 18:07:27 +0200 | [diff] [blame] | 2933 | if (!err) |
| 2934 | n = snd_pcm_calc_delay(substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2935 | snd_pcm_stream_unlock_irq(substream); |
Jeffery Miller | 912e4c3 | 2018-04-20 23:20:46 -0500 | [diff] [blame] | 2936 | if (!err) |
| 2937 | *delay = n; |
| 2938 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2939 | } |
| 2940 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2941 | static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, |
| 2942 | struct snd_pcm_sync_ptr __user *_sync_ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2943 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2944 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 2945 | struct snd_pcm_sync_ptr sync_ptr; |
| 2946 | volatile struct snd_pcm_mmap_status *status; |
| 2947 | volatile struct snd_pcm_mmap_control *control; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2948 | int err; |
| 2949 | |
| 2950 | memset(&sync_ptr, 0, sizeof(sync_ptr)); |
| 2951 | if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) |
| 2952 | return -EFAULT; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 2953 | if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2954 | return -EFAULT; |
| 2955 | status = runtime->status; |
| 2956 | control = runtime->control; |
| 2957 | if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { |
| 2958 | err = snd_pcm_hwsync(substream); |
| 2959 | if (err < 0) |
| 2960 | return err; |
| 2961 | } |
| 2962 | snd_pcm_stream_lock_irq(substream); |
Takashi Iwai | 9027c46 | 2017-05-19 20:22:33 +0200 | [diff] [blame] | 2963 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) { |
Takashi Sakamoto | 66e01a5 | 2017-06-12 09:41:44 +0900 | [diff] [blame] | 2964 | err = pcm_lib_apply_appl_ptr(substream, |
| 2965 | sync_ptr.c.control.appl_ptr); |
Takashi Iwai | 9027c46 | 2017-05-19 20:22:33 +0200 | [diff] [blame] | 2966 | if (err < 0) { |
| 2967 | snd_pcm_stream_unlock_irq(substream); |
| 2968 | return err; |
| 2969 | } |
| 2970 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2971 | sync_ptr.c.control.appl_ptr = control->appl_ptr; |
Takashi Iwai | 9027c46 | 2017-05-19 20:22:33 +0200 | [diff] [blame] | 2972 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2973 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) |
| 2974 | control->avail_min = sync_ptr.c.control.avail_min; |
| 2975 | else |
| 2976 | sync_ptr.c.control.avail_min = control->avail_min; |
| 2977 | sync_ptr.s.status.state = status->state; |
| 2978 | sync_ptr.s.status.hw_ptr = status->hw_ptr; |
| 2979 | sync_ptr.s.status.tstamp = status->tstamp; |
| 2980 | sync_ptr.s.status.suspended_state = status->suspended_state; |
David Henningsson | f853dca | 2018-04-21 14:57:40 +0200 | [diff] [blame] | 2981 | sync_ptr.s.status.audio_tstamp = status->audio_tstamp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2982 | snd_pcm_stream_unlock_irq(substream); |
| 2983 | if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) |
| 2984 | return -EFAULT; |
| 2985 | return 0; |
| 2986 | } |
Jaroslav Kysela | b751eef | 2007-12-13 10:19:42 +0100 | [diff] [blame] | 2987 | |
Arnd Bergmann | 09d9417 | 2018-04-24 20:06:14 +0800 | [diff] [blame] | 2988 | struct snd_pcm_mmap_status32 { |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 2989 | snd_pcm_state_t state; |
Arnd Bergmann | 09d9417 | 2018-04-24 20:06:14 +0800 | [diff] [blame] | 2990 | s32 pad1; |
| 2991 | u32 hw_ptr; |
Arnd Bergmann | 80fe743 | 2018-04-24 20:06:15 +0800 | [diff] [blame] | 2992 | s32 tstamp_sec; |
| 2993 | s32 tstamp_nsec; |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 2994 | snd_pcm_state_t suspended_state; |
Arnd Bergmann | 80fe743 | 2018-04-24 20:06:15 +0800 | [diff] [blame] | 2995 | s32 audio_tstamp_sec; |
| 2996 | s32 audio_tstamp_nsec; |
Arnd Bergmann | 09d9417 | 2018-04-24 20:06:14 +0800 | [diff] [blame] | 2997 | } __attribute__((packed)); |
| 2998 | |
| 2999 | struct snd_pcm_mmap_control32 { |
| 3000 | u32 appl_ptr; |
| 3001 | u32 avail_min; |
| 3002 | }; |
| 3003 | |
| 3004 | struct snd_pcm_sync_ptr32 { |
| 3005 | u32 flags; |
| 3006 | union { |
| 3007 | struct snd_pcm_mmap_status32 status; |
| 3008 | unsigned char reserved[64]; |
| 3009 | } s; |
| 3010 | union { |
| 3011 | struct snd_pcm_mmap_control32 control; |
| 3012 | unsigned char reserved[64]; |
| 3013 | } c; |
| 3014 | } __attribute__((packed)); |
| 3015 | |
| 3016 | /* recalcuate the boundary within 32bit */ |
| 3017 | static snd_pcm_uframes_t recalculate_boundary(struct snd_pcm_runtime *runtime) |
| 3018 | { |
| 3019 | snd_pcm_uframes_t boundary; |
| 3020 | |
| 3021 | if (! runtime->buffer_size) |
| 3022 | return 0; |
| 3023 | boundary = runtime->buffer_size; |
| 3024 | while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size) |
| 3025 | boundary *= 2; |
| 3026 | return boundary; |
| 3027 | } |
| 3028 | |
| 3029 | static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream, |
| 3030 | struct snd_pcm_sync_ptr32 __user *src) |
| 3031 | { |
| 3032 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 3033 | volatile struct snd_pcm_mmap_status *status; |
| 3034 | volatile struct snd_pcm_mmap_control *control; |
| 3035 | u32 sflags; |
| 3036 | struct snd_pcm_mmap_control scontrol; |
| 3037 | struct snd_pcm_mmap_status sstatus; |
| 3038 | snd_pcm_uframes_t boundary; |
| 3039 | int err; |
| 3040 | |
| 3041 | if (snd_BUG_ON(!runtime)) |
| 3042 | return -EINVAL; |
| 3043 | |
| 3044 | if (get_user(sflags, &src->flags) || |
| 3045 | get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) || |
| 3046 | get_user(scontrol.avail_min, &src->c.control.avail_min)) |
| 3047 | return -EFAULT; |
| 3048 | if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) { |
| 3049 | err = snd_pcm_hwsync(substream); |
| 3050 | if (err < 0) |
| 3051 | return err; |
| 3052 | } |
| 3053 | status = runtime->status; |
| 3054 | control = runtime->control; |
| 3055 | boundary = recalculate_boundary(runtime); |
| 3056 | if (! boundary) |
| 3057 | boundary = 0x7fffffff; |
| 3058 | snd_pcm_stream_lock_irq(substream); |
| 3059 | /* FIXME: we should consider the boundary for the sync from app */ |
| 3060 | if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL)) |
| 3061 | control->appl_ptr = scontrol.appl_ptr; |
| 3062 | else |
| 3063 | scontrol.appl_ptr = control->appl_ptr % boundary; |
| 3064 | if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) |
| 3065 | control->avail_min = scontrol.avail_min; |
| 3066 | else |
| 3067 | scontrol.avail_min = control->avail_min; |
| 3068 | sstatus.state = status->state; |
| 3069 | sstatus.hw_ptr = status->hw_ptr % boundary; |
| 3070 | sstatus.tstamp = status->tstamp; |
| 3071 | sstatus.suspended_state = status->suspended_state; |
| 3072 | sstatus.audio_tstamp = status->audio_tstamp; |
| 3073 | snd_pcm_stream_unlock_irq(substream); |
| 3074 | if (put_user(sstatus.state, &src->s.status.state) || |
| 3075 | put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) || |
Arnd Bergmann | 80fe743 | 2018-04-24 20:06:15 +0800 | [diff] [blame] | 3076 | put_user(sstatus.tstamp.tv_sec, &src->s.status.tstamp_sec) || |
| 3077 | put_user(sstatus.tstamp.tv_nsec, &src->s.status.tstamp_nsec) || |
Arnd Bergmann | 09d9417 | 2018-04-24 20:06:14 +0800 | [diff] [blame] | 3078 | put_user(sstatus.suspended_state, &src->s.status.suspended_state) || |
Arnd Bergmann | 80fe743 | 2018-04-24 20:06:15 +0800 | [diff] [blame] | 3079 | put_user(sstatus.audio_tstamp.tv_sec, &src->s.status.audio_tstamp_sec) || |
| 3080 | put_user(sstatus.audio_tstamp.tv_nsec, &src->s.status.audio_tstamp_nsec) || |
Arnd Bergmann | 09d9417 | 2018-04-24 20:06:14 +0800 | [diff] [blame] | 3081 | put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) || |
| 3082 | put_user(scontrol.avail_min, &src->c.control.avail_min)) |
| 3083 | return -EFAULT; |
| 3084 | |
| 3085 | return 0; |
| 3086 | } |
Arnd Bergmann | 80fe743 | 2018-04-24 20:06:15 +0800 | [diff] [blame] | 3087 | #define __SNDRV_PCM_IOCTL_SYNC_PTR32 _IOWR('A', 0x23, struct snd_pcm_sync_ptr32) |
Arnd Bergmann | 09d9417 | 2018-04-24 20:06:14 +0800 | [diff] [blame] | 3088 | |
Jaroslav Kysela | b751eef | 2007-12-13 10:19:42 +0100 | [diff] [blame] | 3089 | static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) |
| 3090 | { |
| 3091 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 3092 | int arg; |
| 3093 | |
| 3094 | if (get_user(arg, _arg)) |
| 3095 | return -EFAULT; |
| 3096 | if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) |
| 3097 | return -EINVAL; |
Takashi Iwai | 2408c21 | 2014-07-10 09:40:38 +0200 | [diff] [blame] | 3098 | runtime->tstamp_type = arg; |
Jaroslav Kysela | b751eef | 2007-12-13 10:19:42 +0100 | [diff] [blame] | 3099 | return 0; |
| 3100 | } |
Takashi Iwai | 67616fe | 2017-08-30 15:39:32 +0200 | [diff] [blame] | 3101 | |
| 3102 | static int snd_pcm_xferi_frames_ioctl(struct snd_pcm_substream *substream, |
| 3103 | struct snd_xferi __user *_xferi) |
| 3104 | { |
| 3105 | struct snd_xferi xferi; |
| 3106 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 3107 | snd_pcm_sframes_t result; |
| 3108 | |
| 3109 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| 3110 | return -EBADFD; |
| 3111 | if (put_user(0, &_xferi->result)) |
| 3112 | return -EFAULT; |
| 3113 | if (copy_from_user(&xferi, _xferi, sizeof(xferi))) |
| 3114 | return -EFAULT; |
| 3115 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 3116 | result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); |
| 3117 | else |
| 3118 | result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); |
Al Viro | ebe6976 | 2020-03-19 18:08:59 -0400 | [diff] [blame] | 3119 | if (put_user(result, &_xferi->result)) |
| 3120 | return -EFAULT; |
Takashi Iwai | 67616fe | 2017-08-30 15:39:32 +0200 | [diff] [blame] | 3121 | return result < 0 ? result : 0; |
| 3122 | } |
| 3123 | |
| 3124 | static int snd_pcm_xfern_frames_ioctl(struct snd_pcm_substream *substream, |
| 3125 | struct snd_xfern __user *_xfern) |
| 3126 | { |
| 3127 | struct snd_xfern xfern; |
| 3128 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 3129 | void *bufs; |
| 3130 | snd_pcm_sframes_t result; |
| 3131 | |
| 3132 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| 3133 | return -EBADFD; |
| 3134 | if (runtime->channels > 128) |
| 3135 | return -EINVAL; |
| 3136 | if (put_user(0, &_xfern->result)) |
| 3137 | return -EFAULT; |
| 3138 | if (copy_from_user(&xfern, _xfern, sizeof(xfern))) |
| 3139 | return -EFAULT; |
| 3140 | |
| 3141 | bufs = memdup_user(xfern.bufs, sizeof(void *) * runtime->channels); |
| 3142 | if (IS_ERR(bufs)) |
| 3143 | return PTR_ERR(bufs); |
| 3144 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 3145 | result = snd_pcm_lib_writev(substream, bufs, xfern.frames); |
| 3146 | else |
| 3147 | result = snd_pcm_lib_readv(substream, bufs, xfern.frames); |
| 3148 | kfree(bufs); |
Al Viro | ebe6976 | 2020-03-19 18:08:59 -0400 | [diff] [blame] | 3149 | if (put_user(result, &_xfern->result)) |
| 3150 | return -EFAULT; |
Takashi Iwai | 67616fe | 2017-08-30 15:39:32 +0200 | [diff] [blame] | 3151 | return result < 0 ? result : 0; |
| 3152 | } |
| 3153 | |
| 3154 | static int snd_pcm_rewind_ioctl(struct snd_pcm_substream *substream, |
| 3155 | snd_pcm_uframes_t __user *_frames) |
| 3156 | { |
| 3157 | snd_pcm_uframes_t frames; |
| 3158 | snd_pcm_sframes_t result; |
| 3159 | |
| 3160 | if (get_user(frames, _frames)) |
| 3161 | return -EFAULT; |
| 3162 | if (put_user(0, _frames)) |
| 3163 | return -EFAULT; |
Takashi Iwai | 763e506 | 2018-04-11 17:56:52 +0200 | [diff] [blame] | 3164 | result = snd_pcm_rewind(substream, frames); |
Al Viro | ebe6976 | 2020-03-19 18:08:59 -0400 | [diff] [blame] | 3165 | if (put_user(result, _frames)) |
| 3166 | return -EFAULT; |
Takashi Iwai | 67616fe | 2017-08-30 15:39:32 +0200 | [diff] [blame] | 3167 | return result < 0 ? result : 0; |
| 3168 | } |
| 3169 | |
| 3170 | static int snd_pcm_forward_ioctl(struct snd_pcm_substream *substream, |
| 3171 | snd_pcm_uframes_t __user *_frames) |
| 3172 | { |
| 3173 | snd_pcm_uframes_t frames; |
| 3174 | snd_pcm_sframes_t result; |
| 3175 | |
| 3176 | if (get_user(frames, _frames)) |
| 3177 | return -EFAULT; |
| 3178 | if (put_user(0, _frames)) |
| 3179 | return -EFAULT; |
Takashi Iwai | 763e506 | 2018-04-11 17:56:52 +0200 | [diff] [blame] | 3180 | result = snd_pcm_forward(substream, frames); |
Al Viro | ebe6976 | 2020-03-19 18:08:59 -0400 | [diff] [blame] | 3181 | if (put_user(result, _frames)) |
| 3182 | return -EFAULT; |
Takashi Iwai | 67616fe | 2017-08-30 15:39:32 +0200 | [diff] [blame] | 3183 | return result < 0 ? result : 0; |
| 3184 | } |
| 3185 | |
| 3186 | static int snd_pcm_common_ioctl(struct file *file, |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 3187 | struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3188 | unsigned int cmd, void __user *arg) |
| 3189 | { |
Takashi Iwai | 4b671f5 | 2017-06-19 23:11:54 +0200 | [diff] [blame] | 3190 | struct snd_pcm_file *pcm_file = file->private_data; |
Takashi Iwai | 7d8e829 | 2017-08-30 16:13:25 +0200 | [diff] [blame] | 3191 | int res; |
| 3192 | |
Takashi Iwai | 67616fe | 2017-08-30 15:39:32 +0200 | [diff] [blame] | 3193 | if (PCM_RUNTIME_CHECK(substream)) |
| 3194 | return -ENXIO; |
| 3195 | |
Takashi Iwai | 7d8e829 | 2017-08-30 16:13:25 +0200 | [diff] [blame] | 3196 | res = snd_power_wait(substream->pcm->card, SNDRV_CTL_POWER_D0); |
| 3197 | if (res < 0) |
| 3198 | return res; |
Takashi Iwai | 4b671f5 | 2017-06-19 23:11:54 +0200 | [diff] [blame] | 3199 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3200 | switch (cmd) { |
| 3201 | case SNDRV_PCM_IOCTL_PVERSION: |
| 3202 | return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; |
| 3203 | case SNDRV_PCM_IOCTL_INFO: |
| 3204 | return snd_pcm_info_user(substream, arg); |
Jaroslav Kysela | 28e9e47 | 2007-12-17 09:02:22 +0100 | [diff] [blame] | 3205 | case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ |
| 3206 | return 0; |
Jaroslav Kysela | b751eef | 2007-12-13 10:19:42 +0100 | [diff] [blame] | 3207 | case SNDRV_PCM_IOCTL_TTSTAMP: |
| 3208 | return snd_pcm_tstamp(substream, arg); |
Takashi Iwai | 4b671f5 | 2017-06-19 23:11:54 +0200 | [diff] [blame] | 3209 | case SNDRV_PCM_IOCTL_USER_PVERSION: |
| 3210 | if (get_user(pcm_file->user_pversion, |
| 3211 | (unsigned int __user *)arg)) |
| 3212 | return -EFAULT; |
| 3213 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3214 | case SNDRV_PCM_IOCTL_HW_REFINE: |
| 3215 | return snd_pcm_hw_refine_user(substream, arg); |
| 3216 | case SNDRV_PCM_IOCTL_HW_PARAMS: |
| 3217 | return snd_pcm_hw_params_user(substream, arg); |
| 3218 | case SNDRV_PCM_IOCTL_HW_FREE: |
| 3219 | return snd_pcm_hw_free(substream); |
| 3220 | case SNDRV_PCM_IOCTL_SW_PARAMS: |
| 3221 | return snd_pcm_sw_params_user(substream, arg); |
Baolin Wang | 3ddee7f | 2018-04-24 20:06:11 +0800 | [diff] [blame] | 3222 | case SNDRV_PCM_IOCTL_STATUS32: |
| 3223 | return snd_pcm_status_user32(substream, arg, false); |
| 3224 | case SNDRV_PCM_IOCTL_STATUS_EXT32: |
| 3225 | return snd_pcm_status_user32(substream, arg, true); |
| 3226 | case SNDRV_PCM_IOCTL_STATUS64: |
| 3227 | return snd_pcm_status_user64(substream, arg, false); |
| 3228 | case SNDRV_PCM_IOCTL_STATUS_EXT64: |
| 3229 | return snd_pcm_status_user64(substream, arg, true); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3230 | case SNDRV_PCM_IOCTL_CHANNEL_INFO: |
| 3231 | return snd_pcm_channel_info_user(substream, arg); |
| 3232 | case SNDRV_PCM_IOCTL_PREPARE: |
Takashi Iwai | 0df63e4 | 2006-04-28 15:13:41 +0200 | [diff] [blame] | 3233 | return snd_pcm_prepare(substream, file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3234 | case SNDRV_PCM_IOCTL_RESET: |
| 3235 | return snd_pcm_reset(substream); |
| 3236 | case SNDRV_PCM_IOCTL_START: |
Takashi Iwai | c2c86a9 | 2017-05-10 14:33:44 +0200 | [diff] [blame] | 3237 | return snd_pcm_start_lock_irq(substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3238 | case SNDRV_PCM_IOCTL_LINK: |
| 3239 | return snd_pcm_link(substream, (int)(unsigned long) arg); |
| 3240 | case SNDRV_PCM_IOCTL_UNLINK: |
| 3241 | return snd_pcm_unlink(substream); |
| 3242 | case SNDRV_PCM_IOCTL_RESUME: |
| 3243 | return snd_pcm_resume(substream); |
| 3244 | case SNDRV_PCM_IOCTL_XRUN: |
| 3245 | return snd_pcm_xrun(substream); |
| 3246 | case SNDRV_PCM_IOCTL_HWSYNC: |
| 3247 | return snd_pcm_hwsync(substream); |
| 3248 | case SNDRV_PCM_IOCTL_DELAY: |
Takashi Iwai | c2c86a9 | 2017-05-10 14:33:44 +0200 | [diff] [blame] | 3249 | { |
Jeffery Miller | 912e4c3 | 2018-04-20 23:20:46 -0500 | [diff] [blame] | 3250 | snd_pcm_sframes_t delay; |
Takashi Iwai | c2c86a9 | 2017-05-10 14:33:44 +0200 | [diff] [blame] | 3251 | snd_pcm_sframes_t __user *res = arg; |
Jeffery Miller | 912e4c3 | 2018-04-20 23:20:46 -0500 | [diff] [blame] | 3252 | int err; |
Takashi Iwai | c2c86a9 | 2017-05-10 14:33:44 +0200 | [diff] [blame] | 3253 | |
Jeffery Miller | 912e4c3 | 2018-04-20 23:20:46 -0500 | [diff] [blame] | 3254 | err = snd_pcm_delay(substream, &delay); |
| 3255 | if (err) |
| 3256 | return err; |
Takashi Iwai | c2c86a9 | 2017-05-10 14:33:44 +0200 | [diff] [blame] | 3257 | if (put_user(delay, res)) |
| 3258 | return -EFAULT; |
| 3259 | return 0; |
| 3260 | } |
Arnd Bergmann | 80fe743 | 2018-04-24 20:06:15 +0800 | [diff] [blame] | 3261 | case __SNDRV_PCM_IOCTL_SYNC_PTR32: |
| 3262 | return snd_pcm_ioctl_sync_ptr_compat(substream, arg); |
| 3263 | case __SNDRV_PCM_IOCTL_SYNC_PTR64: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3264 | return snd_pcm_sync_ptr(substream, arg); |
Takashi Iwai | 59d4858 | 2005-12-01 10:51:58 +0100 | [diff] [blame] | 3265 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3266 | case SNDRV_PCM_IOCTL_HW_REFINE_OLD: |
| 3267 | return snd_pcm_hw_refine_old_user(substream, arg); |
| 3268 | case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: |
| 3269 | return snd_pcm_hw_params_old_user(substream, arg); |
Takashi Iwai | 59d4858 | 2005-12-01 10:51:58 +0100 | [diff] [blame] | 3270 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3271 | case SNDRV_PCM_IOCTL_DRAIN: |
Takashi Iwai | 4cdc115 | 2009-08-20 16:40:16 +0200 | [diff] [blame] | 3272 | return snd_pcm_drain(substream, file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3273 | case SNDRV_PCM_IOCTL_DROP: |
| 3274 | return snd_pcm_drop(substream); |
Takashi Iwai | e661d0d | 2006-02-21 14:14:50 +0100 | [diff] [blame] | 3275 | case SNDRV_PCM_IOCTL_PAUSE: |
Takashi Iwai | cb639a4 | 2020-01-31 16:22:14 +0100 | [diff] [blame] | 3276 | return snd_pcm_pause_lock_irq(substream, (unsigned long)arg); |
Takashi Iwai | 67616fe | 2017-08-30 15:39:32 +0200 | [diff] [blame] | 3277 | case SNDRV_PCM_IOCTL_WRITEI_FRAMES: |
| 3278 | case SNDRV_PCM_IOCTL_READI_FRAMES: |
| 3279 | return snd_pcm_xferi_frames_ioctl(substream, arg); |
| 3280 | case SNDRV_PCM_IOCTL_WRITEN_FRAMES: |
| 3281 | case SNDRV_PCM_IOCTL_READN_FRAMES: |
| 3282 | return snd_pcm_xfern_frames_ioctl(substream, arg); |
| 3283 | case SNDRV_PCM_IOCTL_REWIND: |
| 3284 | return snd_pcm_rewind_ioctl(substream, arg); |
| 3285 | case SNDRV_PCM_IOCTL_FORWARD: |
| 3286 | return snd_pcm_forward_ioctl(substream, arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3287 | } |
Takashi Iwai | 09e56df | 2014-02-04 18:19:48 +0100 | [diff] [blame] | 3288 | pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3289 | return -ENOTTY; |
| 3290 | } |
| 3291 | |
Takashi Iwai | 67616fe | 2017-08-30 15:39:32 +0200 | [diff] [blame] | 3292 | static long snd_pcm_ioctl(struct file *file, unsigned int cmd, |
| 3293 | unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3294 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3295 | struct snd_pcm_file *pcm_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3296 | |
| 3297 | pcm_file = file->private_data; |
| 3298 | |
| 3299 | if (((cmd >> 8) & 0xff) != 'A') |
| 3300 | return -ENOTTY; |
| 3301 | |
Takashi Iwai | 67616fe | 2017-08-30 15:39:32 +0200 | [diff] [blame] | 3302 | return snd_pcm_common_ioctl(file, pcm_file->substream, cmd, |
| 3303 | (void __user *)arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3304 | } |
| 3305 | |
Takashi Iwai | c2c86a9 | 2017-05-10 14:33:44 +0200 | [diff] [blame] | 3306 | /** |
| 3307 | * snd_pcm_kernel_ioctl - Execute PCM ioctl in the kernel-space |
| 3308 | * @substream: PCM substream |
| 3309 | * @cmd: IOCTL cmd |
| 3310 | * @arg: IOCTL argument |
| 3311 | * |
| 3312 | * The function is provided primarily for OSS layer and USB gadget drivers, |
| 3313 | * and it allows only the limited set of ioctls (hw_params, sw_params, |
| 3314 | * prepare, start, drain, drop, forward). |
| 3315 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3316 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3317 | unsigned int cmd, void *arg) |
| 3318 | { |
Takashi Iwai | c2c86a9 | 2017-05-10 14:33:44 +0200 | [diff] [blame] | 3319 | snd_pcm_uframes_t *frames = arg; |
| 3320 | snd_pcm_sframes_t result; |
Takashi Iwai | bf1bbb5 | 2006-03-27 16:22:45 +0200 | [diff] [blame] | 3321 | |
Takashi Iwai | c2c86a9 | 2017-05-10 14:33:44 +0200 | [diff] [blame] | 3322 | switch (cmd) { |
| 3323 | case SNDRV_PCM_IOCTL_FORWARD: |
| 3324 | { |
| 3325 | /* provided only for OSS; capture-only and no value returned */ |
| 3326 | if (substream->stream != SNDRV_PCM_STREAM_CAPTURE) |
| 3327 | return -EINVAL; |
Takashi Iwai | 763e506 | 2018-04-11 17:56:52 +0200 | [diff] [blame] | 3328 | result = snd_pcm_forward(substream, *frames); |
Takashi Iwai | c2c86a9 | 2017-05-10 14:33:44 +0200 | [diff] [blame] | 3329 | return result < 0 ? result : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3330 | } |
Takashi Iwai | c2c86a9 | 2017-05-10 14:33:44 +0200 | [diff] [blame] | 3331 | case SNDRV_PCM_IOCTL_HW_PARAMS: |
| 3332 | return snd_pcm_hw_params(substream, arg); |
| 3333 | case SNDRV_PCM_IOCTL_SW_PARAMS: |
| 3334 | return snd_pcm_sw_params(substream, arg); |
| 3335 | case SNDRV_PCM_IOCTL_PREPARE: |
| 3336 | return snd_pcm_prepare(substream, NULL); |
| 3337 | case SNDRV_PCM_IOCTL_START: |
| 3338 | return snd_pcm_start_lock_irq(substream); |
| 3339 | case SNDRV_PCM_IOCTL_DRAIN: |
Takashi Iwai | 7d8e829 | 2017-08-30 16:13:25 +0200 | [diff] [blame] | 3340 | return snd_pcm_drain(substream, NULL); |
Takashi Iwai | c2c86a9 | 2017-05-10 14:33:44 +0200 | [diff] [blame] | 3341 | case SNDRV_PCM_IOCTL_DROP: |
| 3342 | return snd_pcm_drop(substream); |
| 3343 | case SNDRV_PCM_IOCTL_DELAY: |
Jeffery Miller | 912e4c3 | 2018-04-20 23:20:46 -0500 | [diff] [blame] | 3344 | return snd_pcm_delay(substream, frames); |
Takashi Iwai | c2c86a9 | 2017-05-10 14:33:44 +0200 | [diff] [blame] | 3345 | default: |
| 3346 | return -EINVAL; |
| 3347 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3348 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 3349 | EXPORT_SYMBOL(snd_pcm_kernel_ioctl); |
| 3350 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3351 | static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, |
| 3352 | loff_t * offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3353 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3354 | struct snd_pcm_file *pcm_file; |
| 3355 | struct snd_pcm_substream *substream; |
| 3356 | struct snd_pcm_runtime *runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3357 | snd_pcm_sframes_t result; |
| 3358 | |
| 3359 | pcm_file = file->private_data; |
| 3360 | substream = pcm_file->substream; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 3361 | if (PCM_RUNTIME_CHECK(substream)) |
| 3362 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3363 | runtime = substream->runtime; |
| 3364 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| 3365 | return -EBADFD; |
| 3366 | if (!frame_aligned(runtime, count)) |
| 3367 | return -EINVAL; |
| 3368 | count = bytes_to_frames(runtime, count); |
| 3369 | result = snd_pcm_lib_read(substream, buf, count); |
| 3370 | if (result > 0) |
| 3371 | result = frames_to_bytes(runtime, result); |
| 3372 | return result; |
| 3373 | } |
| 3374 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3375 | static ssize_t snd_pcm_write(struct file *file, const char __user *buf, |
| 3376 | size_t count, loff_t * offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3377 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3378 | struct snd_pcm_file *pcm_file; |
| 3379 | struct snd_pcm_substream *substream; |
| 3380 | struct snd_pcm_runtime *runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3381 | snd_pcm_sframes_t result; |
| 3382 | |
| 3383 | pcm_file = file->private_data; |
| 3384 | substream = pcm_file->substream; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 3385 | if (PCM_RUNTIME_CHECK(substream)) |
| 3386 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3387 | runtime = substream->runtime; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 3388 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| 3389 | return -EBADFD; |
| 3390 | if (!frame_aligned(runtime, count)) |
| 3391 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3392 | count = bytes_to_frames(runtime, count); |
| 3393 | result = snd_pcm_lib_write(substream, buf, count); |
| 3394 | if (result > 0) |
| 3395 | result = frames_to_bytes(runtime, result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3396 | return result; |
| 3397 | } |
| 3398 | |
Al Viro | 1c65d98 | 2015-04-04 00:19:32 -0400 | [diff] [blame] | 3399 | static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3400 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3401 | struct snd_pcm_file *pcm_file; |
| 3402 | struct snd_pcm_substream *substream; |
| 3403 | struct snd_pcm_runtime *runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3404 | snd_pcm_sframes_t result; |
| 3405 | unsigned long i; |
| 3406 | void __user **bufs; |
| 3407 | snd_pcm_uframes_t frames; |
| 3408 | |
Badari Pulavarty | ee0b3e6 | 2006-09-30 23:28:47 -0700 | [diff] [blame] | 3409 | pcm_file = iocb->ki_filp->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3410 | substream = pcm_file->substream; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 3411 | if (PCM_RUNTIME_CHECK(substream)) |
| 3412 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3413 | runtime = substream->runtime; |
| 3414 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| 3415 | return -EBADFD; |
Al Viro | 1c65d98 | 2015-04-04 00:19:32 -0400 | [diff] [blame] | 3416 | if (!iter_is_iovec(to)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3417 | return -EINVAL; |
Al Viro | 1c65d98 | 2015-04-04 00:19:32 -0400 | [diff] [blame] | 3418 | if (to->nr_segs > 1024 || to->nr_segs != runtime->channels) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3419 | return -EINVAL; |
Al Viro | 1c65d98 | 2015-04-04 00:19:32 -0400 | [diff] [blame] | 3420 | if (!frame_aligned(runtime, to->iov->iov_len)) |
| 3421 | return -EINVAL; |
| 3422 | frames = bytes_to_samples(runtime, to->iov->iov_len); |
Kees Cook | 6da2ec5 | 2018-06-12 13:55:00 -0700 | [diff] [blame] | 3423 | bufs = kmalloc_array(to->nr_segs, sizeof(void *), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3424 | if (bufs == NULL) |
| 3425 | return -ENOMEM; |
Al Viro | 1c65d98 | 2015-04-04 00:19:32 -0400 | [diff] [blame] | 3426 | for (i = 0; i < to->nr_segs; ++i) |
| 3427 | bufs[i] = to->iov[i].iov_base; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3428 | result = snd_pcm_lib_readv(substream, bufs, frames); |
| 3429 | if (result > 0) |
| 3430 | result = frames_to_bytes(runtime, result); |
| 3431 | kfree(bufs); |
| 3432 | return result; |
| 3433 | } |
| 3434 | |
Al Viro | 1c65d98 | 2015-04-04 00:19:32 -0400 | [diff] [blame] | 3435 | static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3436 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3437 | struct snd_pcm_file *pcm_file; |
| 3438 | struct snd_pcm_substream *substream; |
| 3439 | struct snd_pcm_runtime *runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3440 | snd_pcm_sframes_t result; |
| 3441 | unsigned long i; |
| 3442 | void __user **bufs; |
| 3443 | snd_pcm_uframes_t frames; |
| 3444 | |
Badari Pulavarty | ee0b3e6 | 2006-09-30 23:28:47 -0700 | [diff] [blame] | 3445 | pcm_file = iocb->ki_filp->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3446 | substream = pcm_file->substream; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 3447 | if (PCM_RUNTIME_CHECK(substream)) |
| 3448 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3449 | runtime = substream->runtime; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 3450 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| 3451 | return -EBADFD; |
Al Viro | 1c65d98 | 2015-04-04 00:19:32 -0400 | [diff] [blame] | 3452 | if (!iter_is_iovec(from)) |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 3453 | return -EINVAL; |
Al Viro | 1c65d98 | 2015-04-04 00:19:32 -0400 | [diff] [blame] | 3454 | if (from->nr_segs > 128 || from->nr_segs != runtime->channels || |
| 3455 | !frame_aligned(runtime, from->iov->iov_len)) |
| 3456 | return -EINVAL; |
| 3457 | frames = bytes_to_samples(runtime, from->iov->iov_len); |
Kees Cook | 6da2ec5 | 2018-06-12 13:55:00 -0700 | [diff] [blame] | 3458 | bufs = kmalloc_array(from->nr_segs, sizeof(void *), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3459 | if (bufs == NULL) |
| 3460 | return -ENOMEM; |
Al Viro | 1c65d98 | 2015-04-04 00:19:32 -0400 | [diff] [blame] | 3461 | for (i = 0; i < from->nr_segs; ++i) |
| 3462 | bufs[i] = from->iov[i].iov_base; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3463 | result = snd_pcm_lib_writev(substream, bufs, frames); |
| 3464 | if (result > 0) |
| 3465 | result = frames_to_bytes(runtime, result); |
| 3466 | kfree(bufs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3467 | return result; |
| 3468 | } |
| 3469 | |
Takashi Iwai | 6448fcb | 2018-04-11 18:05:00 +0200 | [diff] [blame] | 3470 | static __poll_t snd_pcm_poll(struct file *file, poll_table *wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3471 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3472 | struct snd_pcm_file *pcm_file; |
| 3473 | struct snd_pcm_substream *substream; |
| 3474 | struct snd_pcm_runtime *runtime; |
Takashi Iwai | 6448fcb | 2018-04-11 18:05:00 +0200 | [diff] [blame] | 3475 | __poll_t mask, ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3476 | snd_pcm_uframes_t avail; |
| 3477 | |
| 3478 | pcm_file = file->private_data; |
| 3479 | |
| 3480 | substream = pcm_file->substream; |
Takashi Iwai | 6448fcb | 2018-04-11 18:05:00 +0200 | [diff] [blame] | 3481 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 3482 | ok = EPOLLOUT | EPOLLWRNORM; |
| 3483 | else |
| 3484 | ok = EPOLLIN | EPOLLRDNORM; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 3485 | if (PCM_RUNTIME_CHECK(substream)) |
Takashi Iwai | 6448fcb | 2018-04-11 18:05:00 +0200 | [diff] [blame] | 3486 | return ok | EPOLLERR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3487 | |
Takashi Iwai | 6448fcb | 2018-04-11 18:05:00 +0200 | [diff] [blame] | 3488 | runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3489 | poll_wait(file, &runtime->sleep, wait); |
| 3490 | |
Takashi Iwai | 6448fcb | 2018-04-11 18:05:00 +0200 | [diff] [blame] | 3491 | mask = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3492 | snd_pcm_stream_lock_irq(substream); |
Takashi Iwai | 6448fcb | 2018-04-11 18:05:00 +0200 | [diff] [blame] | 3493 | avail = snd_pcm_avail(substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3494 | switch (runtime->status->state) { |
| 3495 | case SNDRV_PCM_STATE_RUNNING: |
| 3496 | case SNDRV_PCM_STATE_PREPARED: |
| 3497 | case SNDRV_PCM_STATE_PAUSED: |
Takashi Iwai | 6448fcb | 2018-04-11 18:05:00 +0200 | [diff] [blame] | 3498 | if (avail >= runtime->control->avail_min) |
| 3499 | mask = ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3500 | break; |
| 3501 | case SNDRV_PCM_STATE_DRAINING: |
Takashi Iwai | 6448fcb | 2018-04-11 18:05:00 +0200 | [diff] [blame] | 3502 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { |
| 3503 | mask = ok; |
| 3504 | if (!avail) |
| 3505 | mask |= EPOLLERR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3506 | } |
Takashi Iwai | 6448fcb | 2018-04-11 18:05:00 +0200 | [diff] [blame] | 3507 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3508 | default: |
Takashi Iwai | 6448fcb | 2018-04-11 18:05:00 +0200 | [diff] [blame] | 3509 | mask = ok | EPOLLERR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3510 | break; |
| 3511 | } |
| 3512 | snd_pcm_stream_unlock_irq(substream); |
| 3513 | return mask; |
| 3514 | } |
| 3515 | |
| 3516 | /* |
| 3517 | * mmap support |
| 3518 | */ |
| 3519 | |
| 3520 | /* |
| 3521 | * Only on coherent architectures, we can mmap the status and the control records |
| 3522 | * for effcient data transfer. On others, we have to use HWSYNC ioctl... |
| 3523 | */ |
| 3524 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) |
| 3525 | /* |
| 3526 | * mmap status record |
| 3527 | */ |
Souptick Joarder | 41412fe | 2018-04-25 09:50:29 +0530 | [diff] [blame] | 3528 | static vm_fault_t snd_pcm_mmap_status_fault(struct vm_fault *vmf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3529 | { |
Dave Jiang | 11bac80 | 2017-02-24 14:56:41 -0800 | [diff] [blame] | 3530 | struct snd_pcm_substream *substream = vmf->vma->vm_private_data; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3531 | struct snd_pcm_runtime *runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3532 | |
| 3533 | if (substream == NULL) |
Nick Piggin | 3ad5afc | 2007-12-13 16:15:00 +0100 | [diff] [blame] | 3534 | return VM_FAULT_SIGBUS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3535 | runtime = substream->runtime; |
Nick Piggin | 3ad5afc | 2007-12-13 16:15:00 +0100 | [diff] [blame] | 3536 | vmf->page = virt_to_page(runtime->status); |
| 3537 | get_page(vmf->page); |
| 3538 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3539 | } |
| 3540 | |
Alexey Dobriyan | f0f37e2f | 2009-09-27 22:29:37 +0400 | [diff] [blame] | 3541 | static const struct vm_operations_struct snd_pcm_vm_ops_status = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3542 | { |
Nick Piggin | 3ad5afc | 2007-12-13 16:15:00 +0100 | [diff] [blame] | 3543 | .fault = snd_pcm_mmap_status_fault, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3544 | }; |
| 3545 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3546 | static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3547 | struct vm_area_struct *area) |
| 3548 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3549 | long size; |
| 3550 | if (!(area->vm_flags & VM_READ)) |
| 3551 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3552 | size = area->vm_end - area->vm_start; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3553 | if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3554 | return -EINVAL; |
| 3555 | area->vm_ops = &snd_pcm_vm_ops_status; |
| 3556 | area->vm_private_data = substream; |
Konstantin Khlebnikov | 314e51b | 2012-10-08 16:29:02 -0700 | [diff] [blame] | 3557 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3558 | return 0; |
| 3559 | } |
| 3560 | |
| 3561 | /* |
| 3562 | * mmap control record |
| 3563 | */ |
Souptick Joarder | 41412fe | 2018-04-25 09:50:29 +0530 | [diff] [blame] | 3564 | static vm_fault_t snd_pcm_mmap_control_fault(struct vm_fault *vmf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3565 | { |
Dave Jiang | 11bac80 | 2017-02-24 14:56:41 -0800 | [diff] [blame] | 3566 | struct snd_pcm_substream *substream = vmf->vma->vm_private_data; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3567 | struct snd_pcm_runtime *runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3568 | |
| 3569 | if (substream == NULL) |
Nick Piggin | 3ad5afc | 2007-12-13 16:15:00 +0100 | [diff] [blame] | 3570 | return VM_FAULT_SIGBUS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3571 | runtime = substream->runtime; |
Nick Piggin | 3ad5afc | 2007-12-13 16:15:00 +0100 | [diff] [blame] | 3572 | vmf->page = virt_to_page(runtime->control); |
| 3573 | get_page(vmf->page); |
| 3574 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3575 | } |
| 3576 | |
Alexey Dobriyan | f0f37e2f | 2009-09-27 22:29:37 +0400 | [diff] [blame] | 3577 | static const struct vm_operations_struct snd_pcm_vm_ops_control = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3578 | { |
Nick Piggin | 3ad5afc | 2007-12-13 16:15:00 +0100 | [diff] [blame] | 3579 | .fault = snd_pcm_mmap_control_fault, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3580 | }; |
| 3581 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3582 | static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3583 | struct vm_area_struct *area) |
| 3584 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3585 | long size; |
| 3586 | if (!(area->vm_flags & VM_READ)) |
| 3587 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3588 | size = area->vm_end - area->vm_start; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3589 | if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3590 | return -EINVAL; |
| 3591 | area->vm_ops = &snd_pcm_vm_ops_control; |
| 3592 | area->vm_private_data = substream; |
Konstantin Khlebnikov | 314e51b | 2012-10-08 16:29:02 -0700 | [diff] [blame] | 3593 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3594 | return 0; |
| 3595 | } |
Takashi Iwai | 42f9459 | 2017-06-19 22:39:18 +0200 | [diff] [blame] | 3596 | |
| 3597 | static bool pcm_status_mmap_allowed(struct snd_pcm_file *pcm_file) |
| 3598 | { |
Takashi Iwai | b602aa8 | 2017-06-27 11:54:37 +0200 | [diff] [blame] | 3599 | /* See pcm_control_mmap_allowed() below. |
| 3600 | * Since older alsa-lib requires both status and control mmaps to be |
| 3601 | * coupled, we have to disable the status mmap for old alsa-lib, too. |
| 3602 | */ |
| 3603 | if (pcm_file->user_pversion < SNDRV_PROTOCOL_VERSION(2, 0, 14) && |
| 3604 | (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR)) |
| 3605 | return false; |
| 3606 | return true; |
| 3607 | } |
| 3608 | |
| 3609 | static bool pcm_control_mmap_allowed(struct snd_pcm_file *pcm_file) |
| 3610 | { |
| 3611 | if (pcm_file->no_compat_mmap) |
| 3612 | return false; |
| 3613 | /* Disallow the control mmap when SYNC_APPLPTR flag is set; |
Takashi Iwai | 42f9459 | 2017-06-19 22:39:18 +0200 | [diff] [blame] | 3614 | * it enforces the user-space to fall back to snd_pcm_sync_ptr(), |
| 3615 | * thus it effectively assures the manual update of appl_ptr. |
Takashi Iwai | 42f9459 | 2017-06-19 22:39:18 +0200 | [diff] [blame] | 3616 | */ |
| 3617 | if (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR) |
| 3618 | return false; |
| 3619 | return true; |
| 3620 | } |
| 3621 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3622 | #else /* ! coherent mmap */ |
| 3623 | /* |
| 3624 | * don't support mmap for status and control records. |
| 3625 | */ |
Takashi Iwai | 42f9459 | 2017-06-19 22:39:18 +0200 | [diff] [blame] | 3626 | #define pcm_status_mmap_allowed(pcm_file) false |
Takashi Iwai | b602aa8 | 2017-06-27 11:54:37 +0200 | [diff] [blame] | 3627 | #define pcm_control_mmap_allowed(pcm_file) false |
Takashi Iwai | 42f9459 | 2017-06-19 22:39:18 +0200 | [diff] [blame] | 3628 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3629 | static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3630 | struct vm_area_struct *area) |
| 3631 | { |
| 3632 | return -ENXIO; |
| 3633 | } |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3634 | static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3635 | struct vm_area_struct *area) |
| 3636 | { |
| 3637 | return -ENXIO; |
| 3638 | } |
| 3639 | #endif /* coherent mmap */ |
| 3640 | |
Takashi Iwai | 9eb4a06 | 2009-11-26 12:43:39 +0100 | [diff] [blame] | 3641 | static inline struct page * |
| 3642 | snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) |
| 3643 | { |
| 3644 | void *vaddr = substream->runtime->dma_area + ofs; |
Takashi Iwai | 7e8edae | 2019-11-05 09:01:37 +0100 | [diff] [blame] | 3645 | |
| 3646 | switch (substream->dma_buffer.dev.type) { |
| 3647 | #ifdef CONFIG_SND_DMA_SGBUF |
| 3648 | case SNDRV_DMA_TYPE_DEV_SG: |
| 3649 | case SNDRV_DMA_TYPE_DEV_UC_SG: |
| 3650 | return snd_pcm_sgbuf_ops_page(substream, ofs); |
| 3651 | #endif /* CONFIG_SND_DMA_SGBUF */ |
| 3652 | case SNDRV_DMA_TYPE_VMALLOC: |
| 3653 | return vmalloc_to_page(vaddr); |
| 3654 | default: |
| 3655 | return virt_to_page(vaddr); |
| 3656 | } |
Takashi Iwai | 9eb4a06 | 2009-11-26 12:43:39 +0100 | [diff] [blame] | 3657 | } |
| 3658 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3659 | /* |
Nick Piggin | 3ad5afc | 2007-12-13 16:15:00 +0100 | [diff] [blame] | 3660 | * fault callback for mmapping a RAM page |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3661 | */ |
Souptick Joarder | 41412fe | 2018-04-25 09:50:29 +0530 | [diff] [blame] | 3662 | static vm_fault_t snd_pcm_mmap_data_fault(struct vm_fault *vmf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3663 | { |
Dave Jiang | 11bac80 | 2017-02-24 14:56:41 -0800 | [diff] [blame] | 3664 | struct snd_pcm_substream *substream = vmf->vma->vm_private_data; |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3665 | struct snd_pcm_runtime *runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3666 | unsigned long offset; |
| 3667 | struct page * page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3668 | size_t dma_bytes; |
| 3669 | |
| 3670 | if (substream == NULL) |
Nick Piggin | 3ad5afc | 2007-12-13 16:15:00 +0100 | [diff] [blame] | 3671 | return VM_FAULT_SIGBUS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3672 | runtime = substream->runtime; |
Nick Piggin | 3ad5afc | 2007-12-13 16:15:00 +0100 | [diff] [blame] | 3673 | offset = vmf->pgoff << PAGE_SHIFT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3674 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); |
| 3675 | if (offset > dma_bytes - PAGE_SIZE) |
Nick Piggin | 3ad5afc | 2007-12-13 16:15:00 +0100 | [diff] [blame] | 3676 | return VM_FAULT_SIGBUS; |
Takashi Iwai | 9eb4a06 | 2009-11-26 12:43:39 +0100 | [diff] [blame] | 3677 | if (substream->ops->page) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3678 | page = substream->ops->page(substream, offset); |
Takashi Iwai | 9eb4a06 | 2009-11-26 12:43:39 +0100 | [diff] [blame] | 3679 | else |
| 3680 | page = snd_pcm_default_page_ops(substream, offset); |
| 3681 | if (!page) |
| 3682 | return VM_FAULT_SIGBUS; |
Nick Piggin | b581003 | 2005-10-29 18:16:12 -0700 | [diff] [blame] | 3683 | get_page(page); |
Nick Piggin | 3ad5afc | 2007-12-13 16:15:00 +0100 | [diff] [blame] | 3684 | vmf->page = page; |
| 3685 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3686 | } |
| 3687 | |
Takashi Iwai | 657b198 | 2009-11-26 12:40:21 +0100 | [diff] [blame] | 3688 | static const struct vm_operations_struct snd_pcm_vm_ops_data = { |
| 3689 | .open = snd_pcm_mmap_data_open, |
| 3690 | .close = snd_pcm_mmap_data_close, |
| 3691 | }; |
| 3692 | |
| 3693 | static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3694 | .open = snd_pcm_mmap_data_open, |
| 3695 | .close = snd_pcm_mmap_data_close, |
Nick Piggin | 3ad5afc | 2007-12-13 16:15:00 +0100 | [diff] [blame] | 3696 | .fault = snd_pcm_mmap_data_fault, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3697 | }; |
| 3698 | |
| 3699 | /* |
| 3700 | * mmap the DMA buffer on RAM |
| 3701 | */ |
Takashi Iwai | 30b771c | 2014-10-30 15:02:50 +0100 | [diff] [blame] | 3702 | |
| 3703 | /** |
| 3704 | * snd_pcm_lib_default_mmap - Default PCM data mmap function |
| 3705 | * @substream: PCM substream |
| 3706 | * @area: VMA |
| 3707 | * |
| 3708 | * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL, |
| 3709 | * this function is invoked implicitly. |
| 3710 | */ |
Takashi Iwai | 18a2b96 | 2011-09-28 17:12:59 +0200 | [diff] [blame] | 3711 | int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, |
| 3712 | struct vm_area_struct *area) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3713 | { |
Konstantin Khlebnikov | 314e51b | 2012-10-08 16:29:02 -0700 | [diff] [blame] | 3714 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
Takashi Iwai | a5606f8 | 2013-10-24 14:25:32 +0200 | [diff] [blame] | 3715 | #ifdef CONFIG_GENERIC_ALLOCATOR |
Nicolin Chen | 0550321 | 2013-10-23 11:47:43 +0800 | [diff] [blame] | 3716 | if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) { |
| 3717 | area->vm_page_prot = pgprot_writecombine(area->vm_page_prot); |
| 3718 | return remap_pfn_range(area, area->vm_start, |
| 3719 | substream->dma_buffer.addr >> PAGE_SHIFT, |
| 3720 | area->vm_end - area->vm_start, area->vm_page_prot); |
| 3721 | } |
Takashi Iwai | a5606f8 | 2013-10-24 14:25:32 +0200 | [diff] [blame] | 3722 | #endif /* CONFIG_GENERIC_ALLOCATOR */ |
Geert Uytterhoeven | abe594c | 2017-07-09 21:31:02 +0200 | [diff] [blame] | 3723 | if (IS_ENABLED(CONFIG_HAS_DMA) && !substream->ops->page && |
Takashi Iwai | 2406ff9 | 2019-11-08 17:56:26 +0100 | [diff] [blame] | 3724 | (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV || |
| 3725 | substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_UC)) |
Takashi Iwai | 657b198 | 2009-11-26 12:40:21 +0100 | [diff] [blame] | 3726 | return dma_mmap_coherent(substream->dma_buffer.dev.dev, |
| 3727 | area, |
| 3728 | substream->runtime->dma_area, |
| 3729 | substream->runtime->dma_addr, |
Stefan Roese | 9066ae7 | 2018-03-26 16:10:21 +0200 | [diff] [blame] | 3730 | substream->runtime->dma_bytes); |
Takashi Iwai | 657b198 | 2009-11-26 12:40:21 +0100 | [diff] [blame] | 3731 | /* mmap with fault handler */ |
| 3732 | area->vm_ops = &snd_pcm_vm_ops_data_fault; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3733 | return 0; |
| 3734 | } |
Takashi Iwai | 18a2b96 | 2011-09-28 17:12:59 +0200 | [diff] [blame] | 3735 | EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3736 | |
| 3737 | /* |
| 3738 | * mmap the DMA buffer on I/O memory area |
| 3739 | */ |
| 3740 | #if SNDRV_PCM_INFO_MMAP_IOMEM |
Takashi Iwai | 30b771c | 2014-10-30 15:02:50 +0100 | [diff] [blame] | 3741 | /** |
| 3742 | * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem |
| 3743 | * @substream: PCM substream |
| 3744 | * @area: VMA |
| 3745 | * |
| 3746 | * When your hardware uses the iomapped pages as the hardware buffer and |
| 3747 | * wants to mmap it, pass this function as mmap pcm_ops. Note that this |
| 3748 | * is supposed to work only on limited architectures. |
| 3749 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3750 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, |
| 3751 | struct vm_area_struct *area) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3752 | { |
Luis de Bethencourt | 3c7f691 | 2018-01-16 13:26:26 +0000 | [diff] [blame] | 3753 | struct snd_pcm_runtime *runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3754 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3755 | area->vm_page_prot = pgprot_noncached(area->vm_page_prot); |
Linus Torvalds | 0fe09a4 | 2013-04-19 10:01:04 -0700 | [diff] [blame] | 3756 | return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3757 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 3758 | EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3759 | #endif /* SNDRV_PCM_INFO_MMAP */ |
| 3760 | |
| 3761 | /* |
| 3762 | * mmap DMA buffer |
| 3763 | */ |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3764 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3765 | struct vm_area_struct *area) |
| 3766 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3767 | struct snd_pcm_runtime *runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3768 | long size; |
| 3769 | unsigned long offset; |
| 3770 | size_t dma_bytes; |
Takashi Iwai | 657b198 | 2009-11-26 12:40:21 +0100 | [diff] [blame] | 3771 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3772 | |
| 3773 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 3774 | if (!(area->vm_flags & (VM_WRITE|VM_READ))) |
| 3775 | return -EINVAL; |
| 3776 | } else { |
| 3777 | if (!(area->vm_flags & VM_READ)) |
| 3778 | return -EINVAL; |
| 3779 | } |
| 3780 | runtime = substream->runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3781 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
| 3782 | return -EBADFD; |
| 3783 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) |
| 3784 | return -ENXIO; |
| 3785 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || |
| 3786 | runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
| 3787 | return -EINVAL; |
| 3788 | size = area->vm_end - area->vm_start; |
| 3789 | offset = area->vm_pgoff << PAGE_SHIFT; |
| 3790 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); |
| 3791 | if ((size_t)size > dma_bytes) |
| 3792 | return -EINVAL; |
| 3793 | if (offset > dma_bytes - size) |
| 3794 | return -EINVAL; |
| 3795 | |
Takashi Iwai | 657b198 | 2009-11-26 12:40:21 +0100 | [diff] [blame] | 3796 | area->vm_ops = &snd_pcm_vm_ops_data; |
| 3797 | area->vm_private_data = substream; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3798 | if (substream->ops->mmap) |
Takashi Iwai | 657b198 | 2009-11-26 12:40:21 +0100 | [diff] [blame] | 3799 | err = substream->ops->mmap(substream, area); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3800 | else |
Takashi Iwai | 18a2b96 | 2011-09-28 17:12:59 +0200 | [diff] [blame] | 3801 | err = snd_pcm_lib_default_mmap(substream, area); |
Takashi Iwai | 657b198 | 2009-11-26 12:40:21 +0100 | [diff] [blame] | 3802 | if (!err) |
| 3803 | atomic_inc(&substream->mmap_count); |
| 3804 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3805 | } |
Takashi Iwai | e88e8ae6 | 2006-04-28 15:13:40 +0200 | [diff] [blame] | 3806 | EXPORT_SYMBOL(snd_pcm_mmap_data); |
| 3807 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3808 | static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) |
| 3809 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3810 | struct snd_pcm_file * pcm_file; |
| 3811 | struct snd_pcm_substream *substream; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3812 | unsigned long offset; |
| 3813 | |
| 3814 | pcm_file = file->private_data; |
| 3815 | substream = pcm_file->substream; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 3816 | if (PCM_RUNTIME_CHECK(substream)) |
| 3817 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3818 | |
| 3819 | offset = area->vm_pgoff << PAGE_SHIFT; |
| 3820 | switch (offset) { |
Arnd Bergmann | 80fe743 | 2018-04-24 20:06:15 +0800 | [diff] [blame] | 3821 | case SNDRV_PCM_MMAP_OFFSET_STATUS_OLD: |
| 3822 | if (pcm_file->no_compat_mmap || !IS_ENABLED(CONFIG_64BIT)) |
| 3823 | return -ENXIO; |
Gustavo A. R. Silva | c0dbbda | 2020-07-08 15:32:36 -0500 | [diff] [blame] | 3824 | fallthrough; |
Arnd Bergmann | 80fe743 | 2018-04-24 20:06:15 +0800 | [diff] [blame] | 3825 | case SNDRV_PCM_MMAP_OFFSET_STATUS_NEW: |
Takashi Iwai | 42f9459 | 2017-06-19 22:39:18 +0200 | [diff] [blame] | 3826 | if (!pcm_status_mmap_allowed(pcm_file)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3827 | return -ENXIO; |
| 3828 | return snd_pcm_mmap_status(substream, file, area); |
Arnd Bergmann | 80fe743 | 2018-04-24 20:06:15 +0800 | [diff] [blame] | 3829 | case SNDRV_PCM_MMAP_OFFSET_CONTROL_OLD: |
| 3830 | if (pcm_file->no_compat_mmap || !IS_ENABLED(CONFIG_64BIT)) |
| 3831 | return -ENXIO; |
Gustavo A. R. Silva | c0dbbda | 2020-07-08 15:32:36 -0500 | [diff] [blame] | 3832 | fallthrough; |
Arnd Bergmann | 80fe743 | 2018-04-24 20:06:15 +0800 | [diff] [blame] | 3833 | case SNDRV_PCM_MMAP_OFFSET_CONTROL_NEW: |
Takashi Iwai | b602aa8 | 2017-06-27 11:54:37 +0200 | [diff] [blame] | 3834 | if (!pcm_control_mmap_allowed(pcm_file)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3835 | return -ENXIO; |
| 3836 | return snd_pcm_mmap_control(substream, file, area); |
| 3837 | default: |
| 3838 | return snd_pcm_mmap_data(substream, file, area); |
| 3839 | } |
| 3840 | return 0; |
| 3841 | } |
| 3842 | |
| 3843 | static int snd_pcm_fasync(int fd, struct file * file, int on) |
| 3844 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3845 | struct snd_pcm_file * pcm_file; |
| 3846 | struct snd_pcm_substream *substream; |
| 3847 | struct snd_pcm_runtime *runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3848 | |
| 3849 | pcm_file = file->private_data; |
| 3850 | substream = pcm_file->substream; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 3851 | if (PCM_RUNTIME_CHECK(substream)) |
Takashi Iwai | d05468b | 2010-04-07 18:29:46 +0200 | [diff] [blame] | 3852 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3853 | runtime = substream->runtime; |
Takashi Iwai | d05468b | 2010-04-07 18:29:46 +0200 | [diff] [blame] | 3854 | return fasync_helper(fd, file, on, &runtime->fasync); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3855 | } |
| 3856 | |
| 3857 | /* |
| 3858 | * ioctl32 compat |
| 3859 | */ |
| 3860 | #ifdef CONFIG_COMPAT |
| 3861 | #include "pcm_compat.c" |
| 3862 | #else |
| 3863 | #define snd_pcm_ioctl_compat NULL |
| 3864 | #endif |
| 3865 | |
| 3866 | /* |
| 3867 | * To be removed helpers to keep binary compatibility |
| 3868 | */ |
| 3869 | |
Takashi Iwai | 59d4858 | 2005-12-01 10:51:58 +0100 | [diff] [blame] | 3870 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3871 | #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) |
| 3872 | #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) |
| 3873 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3874 | static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, |
| 3875 | struct snd_pcm_hw_params_old *oparams) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3876 | { |
| 3877 | unsigned int i; |
| 3878 | |
| 3879 | memset(params, 0, sizeof(*params)); |
| 3880 | params->flags = oparams->flags; |
| 3881 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) |
| 3882 | params->masks[i].bits[0] = oparams->masks[i]; |
| 3883 | memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); |
| 3884 | params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); |
| 3885 | params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); |
| 3886 | params->info = oparams->info; |
| 3887 | params->msbits = oparams->msbits; |
| 3888 | params->rate_num = oparams->rate_num; |
| 3889 | params->rate_den = oparams->rate_den; |
| 3890 | params->fifo_size = oparams->fifo_size; |
| 3891 | } |
| 3892 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3893 | static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, |
| 3894 | struct snd_pcm_hw_params *params) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3895 | { |
| 3896 | unsigned int i; |
| 3897 | |
| 3898 | memset(oparams, 0, sizeof(*oparams)); |
| 3899 | oparams->flags = params->flags; |
| 3900 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) |
| 3901 | oparams->masks[i] = params->masks[i].bits[0]; |
| 3902 | memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); |
| 3903 | oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); |
| 3904 | oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); |
| 3905 | oparams->info = params->info; |
| 3906 | oparams->msbits = params->msbits; |
| 3907 | oparams->rate_num = params->rate_num; |
| 3908 | oparams->rate_den = params->rate_den; |
| 3909 | oparams->fifo_size = params->fifo_size; |
| 3910 | } |
| 3911 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3912 | static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, |
| 3913 | struct snd_pcm_hw_params_old __user * _oparams) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3914 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3915 | struct snd_pcm_hw_params *params; |
| 3916 | struct snd_pcm_hw_params_old *oparams = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3917 | int err; |
| 3918 | |
| 3919 | params = kmalloc(sizeof(*params), GFP_KERNEL); |
Li Zefan | ef44a1e | 2009-04-10 09:43:08 +0800 | [diff] [blame] | 3920 | if (!params) |
| 3921 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3922 | |
Li Zefan | ef44a1e | 2009-04-10 09:43:08 +0800 | [diff] [blame] | 3923 | oparams = memdup_user(_oparams, sizeof(*oparams)); |
| 3924 | if (IS_ERR(oparams)) { |
| 3925 | err = PTR_ERR(oparams); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3926 | goto out; |
| 3927 | } |
| 3928 | snd_pcm_hw_convert_from_old_params(params, oparams); |
| 3929 | err = snd_pcm_hw_refine(substream, params); |
Takashi Sakamoto | f74ae15 | 2017-06-11 23:56:12 +0900 | [diff] [blame] | 3930 | if (err < 0) |
| 3931 | goto out_old; |
Li Zefan | ef44a1e | 2009-04-10 09:43:08 +0800 | [diff] [blame] | 3932 | |
Takashi Sakamoto | f74ae15 | 2017-06-11 23:56:12 +0900 | [diff] [blame] | 3933 | err = fixup_unreferenced_params(substream, params); |
| 3934 | if (err < 0) |
| 3935 | goto out_old; |
| 3936 | |
| 3937 | snd_pcm_hw_convert_to_old_params(oparams, params); |
| 3938 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) |
| 3939 | err = -EFAULT; |
| 3940 | out_old: |
Li Zefan | ef44a1e | 2009-04-10 09:43:08 +0800 | [diff] [blame] | 3941 | kfree(oparams); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3942 | out: |
| 3943 | kfree(params); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3944 | return err; |
| 3945 | } |
| 3946 | |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3947 | static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, |
| 3948 | struct snd_pcm_hw_params_old __user * _oparams) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3949 | { |
Takashi Iwai | 877211f | 2005-11-17 13:59:38 +0100 | [diff] [blame] | 3950 | struct snd_pcm_hw_params *params; |
| 3951 | struct snd_pcm_hw_params_old *oparams = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3952 | int err; |
| 3953 | |
| 3954 | params = kmalloc(sizeof(*params), GFP_KERNEL); |
Li Zefan | ef44a1e | 2009-04-10 09:43:08 +0800 | [diff] [blame] | 3955 | if (!params) |
| 3956 | return -ENOMEM; |
| 3957 | |
| 3958 | oparams = memdup_user(_oparams, sizeof(*oparams)); |
| 3959 | if (IS_ERR(oparams)) { |
| 3960 | err = PTR_ERR(oparams); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3961 | goto out; |
| 3962 | } |
Takashi Sakamoto | f74ae15 | 2017-06-11 23:56:12 +0900 | [diff] [blame] | 3963 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3964 | snd_pcm_hw_convert_from_old_params(params, oparams); |
| 3965 | err = snd_pcm_hw_params(substream, params); |
Takashi Sakamoto | f74ae15 | 2017-06-11 23:56:12 +0900 | [diff] [blame] | 3966 | if (err < 0) |
| 3967 | goto out_old; |
Li Zefan | ef44a1e | 2009-04-10 09:43:08 +0800 | [diff] [blame] | 3968 | |
Takashi Sakamoto | f74ae15 | 2017-06-11 23:56:12 +0900 | [diff] [blame] | 3969 | snd_pcm_hw_convert_to_old_params(oparams, params); |
| 3970 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) |
| 3971 | err = -EFAULT; |
| 3972 | out_old: |
Li Zefan | ef44a1e | 2009-04-10 09:43:08 +0800 | [diff] [blame] | 3973 | kfree(oparams); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3974 | out: |
| 3975 | kfree(params); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3976 | return err; |
| 3977 | } |
Takashi Iwai | 59d4858 | 2005-12-01 10:51:58 +0100 | [diff] [blame] | 3978 | #endif /* CONFIG_SND_SUPPORT_OLD_API */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3979 | |
Cliff Cai | 7003609 | 2008-09-03 10:54:36 +0200 | [diff] [blame] | 3980 | #ifndef CONFIG_MMU |
Daniel Glöckner | 55c63bd | 2010-03-09 12:57:52 -0500 | [diff] [blame] | 3981 | static unsigned long snd_pcm_get_unmapped_area(struct file *file, |
| 3982 | unsigned long addr, |
| 3983 | unsigned long len, |
| 3984 | unsigned long pgoff, |
| 3985 | unsigned long flags) |
Cliff Cai | 7003609 | 2008-09-03 10:54:36 +0200 | [diff] [blame] | 3986 | { |
Daniel Glöckner | 55c63bd | 2010-03-09 12:57:52 -0500 | [diff] [blame] | 3987 | struct snd_pcm_file *pcm_file = file->private_data; |
| 3988 | struct snd_pcm_substream *substream = pcm_file->substream; |
| 3989 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 3990 | unsigned long offset = pgoff << PAGE_SHIFT; |
| 3991 | |
| 3992 | switch (offset) { |
Arnd Bergmann | 80fe743 | 2018-04-24 20:06:15 +0800 | [diff] [blame] | 3993 | case SNDRV_PCM_MMAP_OFFSET_STATUS_NEW: |
Daniel Glöckner | 55c63bd | 2010-03-09 12:57:52 -0500 | [diff] [blame] | 3994 | return (unsigned long)runtime->status; |
Arnd Bergmann | 80fe743 | 2018-04-24 20:06:15 +0800 | [diff] [blame] | 3995 | case SNDRV_PCM_MMAP_OFFSET_CONTROL_NEW: |
Daniel Glöckner | 55c63bd | 2010-03-09 12:57:52 -0500 | [diff] [blame] | 3996 | return (unsigned long)runtime->control; |
| 3997 | default: |
| 3998 | return (unsigned long)runtime->dma_area + offset; |
| 3999 | } |
Cliff Cai | 7003609 | 2008-09-03 10:54:36 +0200 | [diff] [blame] | 4000 | } |
| 4001 | #else |
Daniel Glöckner | 55c63bd | 2010-03-09 12:57:52 -0500 | [diff] [blame] | 4002 | # define snd_pcm_get_unmapped_area NULL |
Cliff Cai | 7003609 | 2008-09-03 10:54:36 +0200 | [diff] [blame] | 4003 | #endif |
| 4004 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4005 | /* |
| 4006 | * Register section |
| 4007 | */ |
| 4008 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 4009 | const struct file_operations snd_pcm_f_ops[2] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4010 | { |
Clemens Ladisch | 2af677f | 2005-11-20 14:03:48 +0100 | [diff] [blame] | 4011 | .owner = THIS_MODULE, |
| 4012 | .write = snd_pcm_write, |
Al Viro | 1c65d98 | 2015-04-04 00:19:32 -0400 | [diff] [blame] | 4013 | .write_iter = snd_pcm_writev, |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 4014 | .open = snd_pcm_playback_open, |
Clemens Ladisch | 2af677f | 2005-11-20 14:03:48 +0100 | [diff] [blame] | 4015 | .release = snd_pcm_release, |
Takashi Iwai | 02f4865 | 2010-04-13 11:49:04 +0200 | [diff] [blame] | 4016 | .llseek = no_llseek, |
Takashi Iwai | 6448fcb | 2018-04-11 18:05:00 +0200 | [diff] [blame] | 4017 | .poll = snd_pcm_poll, |
Takashi Iwai | 67616fe | 2017-08-30 15:39:32 +0200 | [diff] [blame] | 4018 | .unlocked_ioctl = snd_pcm_ioctl, |
Clemens Ladisch | 2af677f | 2005-11-20 14:03:48 +0100 | [diff] [blame] | 4019 | .compat_ioctl = snd_pcm_ioctl_compat, |
| 4020 | .mmap = snd_pcm_mmap, |
| 4021 | .fasync = snd_pcm_fasync, |
Daniel Glöckner | 55c63bd | 2010-03-09 12:57:52 -0500 | [diff] [blame] | 4022 | .get_unmapped_area = snd_pcm_get_unmapped_area, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4023 | }, |
| 4024 | { |
Clemens Ladisch | 2af677f | 2005-11-20 14:03:48 +0100 | [diff] [blame] | 4025 | .owner = THIS_MODULE, |
| 4026 | .read = snd_pcm_read, |
Al Viro | 1c65d98 | 2015-04-04 00:19:32 -0400 | [diff] [blame] | 4027 | .read_iter = snd_pcm_readv, |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 4028 | .open = snd_pcm_capture_open, |
Clemens Ladisch | 2af677f | 2005-11-20 14:03:48 +0100 | [diff] [blame] | 4029 | .release = snd_pcm_release, |
Takashi Iwai | 02f4865 | 2010-04-13 11:49:04 +0200 | [diff] [blame] | 4030 | .llseek = no_llseek, |
Takashi Iwai | 6448fcb | 2018-04-11 18:05:00 +0200 | [diff] [blame] | 4031 | .poll = snd_pcm_poll, |
Takashi Iwai | 67616fe | 2017-08-30 15:39:32 +0200 | [diff] [blame] | 4032 | .unlocked_ioctl = snd_pcm_ioctl, |
Clemens Ladisch | 2af677f | 2005-11-20 14:03:48 +0100 | [diff] [blame] | 4033 | .compat_ioctl = snd_pcm_ioctl_compat, |
| 4034 | .mmap = snd_pcm_mmap, |
| 4035 | .fasync = snd_pcm_fasync, |
Daniel Glöckner | 55c63bd | 2010-03-09 12:57:52 -0500 | [diff] [blame] | 4036 | .get_unmapped_area = snd_pcm_get_unmapped_area, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4037 | } |
| 4038 | }; |