diff options
Diffstat (limited to 'include/sound/pcm.h')
| -rw-r--r-- | include/sound/pcm.h | 351 |
1 files changed, 222 insertions, 129 deletions
diff --git a/include/sound/pcm.h b/include/sound/pcm.h index 2ba5df2c9e23..58fd6e84f961 100644 --- a/include/sound/pcm.h +++ b/include/sound/pcm.h @@ -16,6 +16,7 @@ #include <linux/bitops.h> #include <linux/pm_qos.h> #include <linux/refcount.h> +#include <linux/uio.h> #define snd_pcm_substream_chip(substream) ((substream)->private_data) #define snd_pcm_chip(pcm) ((pcm)->private_data) @@ -31,6 +32,7 @@ struct snd_pcm_hardware { unsigned int info; /* SNDRV_PCM_INFO_* */ u64 formats; /* SNDRV_PCM_FMTBIT_* */ + u32 subformats; /* for S32_LE, SNDRV_PCM_SUBFMTBIT_* */ unsigned int rates; /* SNDRV_PCM_RATE_* */ unsigned int rate_min; /* min rate */ unsigned int rate_max; /* max rate */ @@ -68,11 +70,8 @@ struct snd_pcm_ops { struct snd_pcm_audio_tstamp_report *audio_tstamp_report); int (*fill_silence)(struct snd_pcm_substream *substream, int channel, unsigned long pos, unsigned long bytes); - int (*copy_user)(struct snd_pcm_substream *substream, int channel, - unsigned long pos, void __user *buf, - unsigned long bytes); - int (*copy_kernel)(struct snd_pcm_substream *substream, int channel, - unsigned long pos, void *buf, unsigned long bytes); + int (*copy)(struct snd_pcm_substream *substream, int channel, + unsigned long pos, struct iov_iter *iter, unsigned long bytes); struct page *(*page)(struct snd_pcm_substream *substream, unsigned long offset); int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma); @@ -94,36 +93,43 @@ struct snd_pcm_ops { #define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2 /* 3 is absent slot. */ #define SNDRV_PCM_IOCTL1_FIFO_SIZE 4 +#define SNDRV_PCM_IOCTL1_SYNC_ID 5 #define SNDRV_PCM_TRIGGER_STOP 0 #define SNDRV_PCM_TRIGGER_START 1 -#define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3 -#define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4 -#define SNDRV_PCM_TRIGGER_SUSPEND 5 -#define SNDRV_PCM_TRIGGER_RESUME 6 -#define SNDRV_PCM_TRIGGER_DRAIN 7 +#define SNDRV_PCM_TRIGGER_PAUSE_PUSH 2 +#define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 3 +#define SNDRV_PCM_TRIGGER_SUSPEND 4 +#define SNDRV_PCM_TRIGGER_RESUME 5 +#define SNDRV_PCM_TRIGGER_DRAIN 6 #define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1) /* If you change this don't forget to change rates[] table in pcm_native.c */ -#define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */ -#define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */ -#define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */ -#define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */ -#define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */ -#define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */ -#define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */ -#define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */ -#define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */ -#define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */ -#define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */ -#define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */ -#define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */ -#define SNDRV_PCM_RATE_352800 (1<<13) /* 352800Hz */ -#define SNDRV_PCM_RATE_384000 (1<<14) /* 384000Hz */ - -#define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */ -#define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */ +#define SNDRV_PCM_RATE_5512 (1U<<0) /* 5512Hz */ +#define SNDRV_PCM_RATE_8000 (1U<<1) /* 8000Hz */ +#define SNDRV_PCM_RATE_11025 (1U<<2) /* 11025Hz */ +#define SNDRV_PCM_RATE_16000 (1U<<3) /* 16000Hz */ +#define SNDRV_PCM_RATE_22050 (1U<<4) /* 22050Hz */ +#define SNDRV_PCM_RATE_32000 (1U<<5) /* 32000Hz */ +#define SNDRV_PCM_RATE_44100 (1U<<6) /* 44100Hz */ +#define SNDRV_PCM_RATE_48000 (1U<<7) /* 48000Hz */ +#define SNDRV_PCM_RATE_64000 (1U<<8) /* 64000Hz */ +#define SNDRV_PCM_RATE_88200 (1U<<9) /* 88200Hz */ +#define SNDRV_PCM_RATE_96000 (1U<<10) /* 96000Hz */ +#define SNDRV_PCM_RATE_176400 (1U<<11) /* 176400Hz */ +#define SNDRV_PCM_RATE_192000 (1U<<12) /* 192000Hz */ +#define SNDRV_PCM_RATE_352800 (1U<<13) /* 352800Hz */ +#define SNDRV_PCM_RATE_384000 (1U<<14) /* 384000Hz */ +#define SNDRV_PCM_RATE_705600 (1U<<15) /* 705600Hz */ +#define SNDRV_PCM_RATE_768000 (1U<<16) /* 768000Hz */ +/* extended rates since 6.12 */ +#define SNDRV_PCM_RATE_12000 (1U<<17) /* 12000Hz */ +#define SNDRV_PCM_RATE_24000 (1U<<18) /* 24000Hz */ +#define SNDRV_PCM_RATE_128000 (1U<<19) /* 128000Hz */ + +#define SNDRV_PCM_RATE_CONTINUOUS (1U<<30) /* continuous range */ +#define SNDRV_PCM_RATE_KNOT (1U<<31) /* supports more non-continuous rates */ #define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\ SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\ @@ -136,6 +142,9 @@ struct snd_pcm_ops { #define SNDRV_PCM_RATE_8000_384000 (SNDRV_PCM_RATE_8000_192000|\ SNDRV_PCM_RATE_352800|\ SNDRV_PCM_RATE_384000) +#define SNDRV_PCM_RATE_8000_768000 (SNDRV_PCM_RATE_8000_384000|\ + SNDRV_PCM_RATE_705600|\ + SNDRV_PCM_RATE_768000) #define _SNDRV_PCM_FMTBIT(fmt) (1ULL << (__force int)SNDRV_PCM_FORMAT_##fmt) #define SNDRV_PCM_FMTBIT_S8 _SNDRV_PCM_FMTBIT(S8) #define SNDRV_PCM_FMTBIT_U8 _SNDRV_PCM_FMTBIT(U8) @@ -147,6 +156,9 @@ struct snd_pcm_ops { #define SNDRV_PCM_FMTBIT_S24_BE _SNDRV_PCM_FMTBIT(S24_BE) #define SNDRV_PCM_FMTBIT_U24_LE _SNDRV_PCM_FMTBIT(U24_LE) #define SNDRV_PCM_FMTBIT_U24_BE _SNDRV_PCM_FMTBIT(U24_BE) +// For S32/U32 formats, 'msbits' hardware parameter is often used to deliver information about the +// available bit count in most significant bit. It's for the case of so-called 'left-justified' or +// `right-padding` sample which has less width than 32 bit. #define SNDRV_PCM_FMTBIT_S32_LE _SNDRV_PCM_FMTBIT(S32_LE) #define SNDRV_PCM_FMTBIT_S32_BE _SNDRV_PCM_FMTBIT(S32_BE) #define SNDRV_PCM_FMTBIT_U32_LE _SNDRV_PCM_FMTBIT(U32_LE) @@ -216,6 +228,12 @@ struct snd_pcm_ops { #define SNDRV_PCM_FMTBIT_U20 SNDRV_PCM_FMTBIT_U20_BE #endif +#define _SNDRV_PCM_SUBFMTBIT(fmt) BIT((__force int)SNDRV_PCM_SUBFORMAT_##fmt) +#define SNDRV_PCM_SUBFMTBIT_STD _SNDRV_PCM_SUBFMTBIT(STD) +#define SNDRV_PCM_SUBFMTBIT_MSBITS_MAX _SNDRV_PCM_SUBFMTBIT(MSBITS_MAX) +#define SNDRV_PCM_SUBFMTBIT_MSBITS_20 _SNDRV_PCM_SUBFMTBIT(MSBITS_20) +#define SNDRV_PCM_SUBFMTBIT_MSBITS_24 _SNDRV_PCM_SUBFMTBIT(MSBITS_24) + struct snd_pcm_file { struct snd_pcm_substream *substream; int no_compat_mmap; @@ -229,7 +247,7 @@ typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule { unsigned int cond; int var; - int deps[4]; + int deps[5]; snd_pcm_hw_rule_func_t func; void *private; @@ -343,6 +361,8 @@ static inline void snd_pcm_pack_audio_tstamp_report(__u32 *data, __u32 *accuracy struct snd_pcm_runtime { /* -- Status -- */ + snd_pcm_state_t state; /* stream state */ + snd_pcm_state_t suspended_state; /* suspended stream state */ struct snd_pcm_substream *trigger_master; struct timespec64 trigger_tstamp; /* trigger timestamp */ bool trigger_tstamp_latched; /* trigger timestamp latched in low-level driver/hardware */ @@ -373,20 +393,20 @@ struct snd_pcm_runtime { unsigned int rate_den; unsigned int no_period_wakeup: 1; - /* -- SW params -- */ - int tstamp_mode; /* mmap timestamp is updated */ + /* -- SW params; see struct snd_pcm_sw_params for comments -- */ + int tstamp_mode; unsigned int period_step; snd_pcm_uframes_t start_threshold; snd_pcm_uframes_t stop_threshold; - snd_pcm_uframes_t silence_threshold; /* Silence filling happens when - noise is nearest than this */ - snd_pcm_uframes_t silence_size; /* Silence filling size */ - snd_pcm_uframes_t boundary; /* pointers wrap point */ + snd_pcm_uframes_t silence_threshold; + snd_pcm_uframes_t silence_size; + snd_pcm_uframes_t boundary; + /* internal data of auto-silencer */ snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ - snd_pcm_uframes_t silence_filled; /* size filled with silence */ + snd_pcm_uframes_t silence_filled; /* already filled part of silence area */ - union snd_pcm_sync_id sync; /* hardware synchronization ID */ + bool std_sync_id; /* hardware synchronization - standard per card ID */ /* -- mmap -- */ struct snd_pcm_mmap_status *status; @@ -396,8 +416,10 @@ struct snd_pcm_runtime { snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */ wait_queue_head_t sleep; /* poll sleep */ wait_queue_head_t tsleep; /* transfer sleep */ - struct fasync_struct *fasync; + struct snd_fasync *fasync; bool stop_operating; /* sync_stop will be called */ + struct mutex buffer_mutex; /* protect for buffer changes */ + atomic_t buffer_accessing; /* >0: in r/w operation, <0: blocked */ /* -- private section -- */ void *private_data; @@ -480,6 +502,9 @@ struct snd_pcm_substream { /* misc flags */ unsigned int hw_opened: 1; unsigned int managed_buffer_alloc:1; +#ifdef CONFIG_SND_PCM_XRUN_DEBUG + unsigned int xrun_counter; /* number of times xrun happens */ +#endif /* CONFIG_SND_PCM_XRUN_DEBUG */ }; #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) @@ -503,7 +528,7 @@ struct snd_pcm_str { #endif #endif struct snd_kcontrol *chmap_kctl; /* channel-mapping controls */ - struct device dev; + struct device *dev; }; struct snd_pcm { @@ -602,7 +627,7 @@ snd_pcm_debug_name(struct snd_pcm_substream *substream, char *buf, size_t size) * snd_pcm_stream_linked - Check whether the substream is linked with others * @substream: substream to check * - * Returns true if the given substream is being linked with others. + * Return: true if the given substream is being linked with others */ static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) { @@ -614,6 +639,7 @@ void snd_pcm_stream_unlock(struct snd_pcm_substream *substream); void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream); void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream); unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream); +unsigned long _snd_pcm_stream_lock_irqsave_nested(struct snd_pcm_substream *substream); /** * snd_pcm_stream_lock_irqsave - Lock the PCM stream @@ -633,6 +659,32 @@ void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, unsigned long flags); /** + * snd_pcm_stream_lock_irqsave_nested - Single-nested PCM stream locking + * @substream: PCM substream + * @flags: irq flags + * + * This locks the PCM stream like snd_pcm_stream_lock_irqsave() but with + * the single-depth lockdep subclass. + */ +#define snd_pcm_stream_lock_irqsave_nested(substream, flags) \ + do { \ + typecheck(unsigned long, flags); \ + flags = _snd_pcm_stream_lock_irqsave_nested(substream); \ + } while (0) + +/* definitions for guard(); use like guard(pcm_stream_lock) */ +DEFINE_LOCK_GUARD_1(pcm_stream_lock, struct snd_pcm_substream, + snd_pcm_stream_lock(_T->lock), + snd_pcm_stream_unlock(_T->lock)) +DEFINE_LOCK_GUARD_1(pcm_stream_lock_irq, struct snd_pcm_substream, + snd_pcm_stream_lock_irq(_T->lock), + snd_pcm_stream_unlock_irq(_T->lock)) +DEFINE_LOCK_GUARD_1(pcm_stream_lock_irqsave, struct snd_pcm_substream, + snd_pcm_stream_lock_irqsave(_T->lock, _T->flags), + snd_pcm_stream_unlock_irqrestore(_T->lock, _T->flags), + unsigned long flags) + +/** * snd_pcm_group_for_each_entry - iterate over the linked substreams * @s: the iterator * @substream: the substream @@ -653,20 +705,36 @@ void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, * snd_pcm_running - Check whether the substream is in a running state * @substream: substream to check * - * Returns true if the given substream is in the state RUNNING, or in the + * Return: true if the given substream is in the state RUNNING, or in the * state DRAINING for playback. */ static inline int snd_pcm_running(struct snd_pcm_substream *substream) { - return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || - (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && + return (substream->runtime->state == SNDRV_PCM_STATE_RUNNING || + (substream->runtime->state == SNDRV_PCM_STATE_DRAINING && substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); } /** + * __snd_pcm_set_state - Change the current PCM state + * @runtime: PCM runtime to set + * @state: the current state to set + * + * Call within the stream lock + */ +static inline void __snd_pcm_set_state(struct snd_pcm_runtime *runtime, + snd_pcm_state_t state) +{ + runtime->state = state; + runtime->status->state = state; /* copy for mmap */ +} + +/** * bytes_to_samples - Unit conversion of the size from bytes to samples * @runtime: PCM runtime instance * @size: size in bytes + * + * Return: the size in samples */ static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) { @@ -677,6 +745,8 @@ static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t * bytes_to_frames - Unit conversion of the size from bytes to frames * @runtime: PCM runtime instance * @size: size in bytes + * + * Return: the size in frames */ static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) { @@ -687,6 +757,8 @@ static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, * samples_to_bytes - Unit conversion of the size from samples to bytes * @runtime: PCM runtime instance * @size: size in samples + * + * Return: the byte size */ static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) { @@ -697,6 +769,8 @@ static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t * frames_to_bytes - Unit conversion of the size from frames to bytes * @runtime: PCM runtime instance * @size: size in frames + * + * Return: the byte size */ static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) { @@ -707,6 +781,8 @@ static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_s * frame_aligned - Check whether the byte size is aligned to frames * @runtime: PCM runtime instance * @bytes: size in bytes + * + * Return: true if aligned, or false if not */ static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) { @@ -716,6 +792,8 @@ static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) /** * snd_pcm_lib_buffer_bytes - Get the buffer size of the current PCM in bytes * @substream: PCM substream + * + * Return: buffer byte size */ static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) { @@ -726,6 +804,8 @@ static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substrea /** * snd_pcm_lib_period_bytes - Get the period size of the current PCM in bytes * @substream: PCM substream + * + * Return: period byte size */ static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) { @@ -738,6 +818,8 @@ static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substrea * @runtime: PCM runtime instance * * Result is between 0 ... (boundary - 1) + * + * Return: available frame size */ static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) { @@ -754,6 +836,8 @@ static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *r * @runtime: PCM runtime instance * * Result is between 0 ... (boundary - 1) + * + * Return: available frame size */ static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) { @@ -766,6 +850,8 @@ static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *ru /** * snd_pcm_playback_hw_avail - Get the queued space for playback * @runtime: PCM runtime instance + * + * Return: available frame size */ static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) { @@ -775,6 +861,8 @@ static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime /** * snd_pcm_capture_hw_avail - Get the free space for capture * @runtime: PCM runtime instance + * + * Return: available frame size */ static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) { @@ -914,6 +1002,8 @@ static inline const struct snd_interval *hw_param_interval_c(const struct snd_pc /** * params_channels - Get the number of channels from the hw params * @p: hw params + * + * Return: the number of channels */ static inline unsigned int params_channels(const struct snd_pcm_hw_params *p) { @@ -923,6 +1013,8 @@ static inline unsigned int params_channels(const struct snd_pcm_hw_params *p) /** * params_rate - Get the sample rate from the hw params * @p: hw params + * + * Return: the sample rate */ static inline unsigned int params_rate(const struct snd_pcm_hw_params *p) { @@ -932,6 +1024,8 @@ static inline unsigned int params_rate(const struct snd_pcm_hw_params *p) /** * params_period_size - Get the period size (in frames) from the hw params * @p: hw params + * + * Return: the period size in frames */ static inline unsigned int params_period_size(const struct snd_pcm_hw_params *p) { @@ -941,6 +1035,8 @@ static inline unsigned int params_period_size(const struct snd_pcm_hw_params *p) /** * params_periods - Get the number of periods from the hw params * @p: hw params + * + * Return: the number of periods */ static inline unsigned int params_periods(const struct snd_pcm_hw_params *p) { @@ -950,6 +1046,8 @@ static inline unsigned int params_periods(const struct snd_pcm_hw_params *p) /** * params_buffer_size - Get the buffer size (in frames) from the hw params * @p: hw params + * + * Return: the buffer size in frames */ static inline unsigned int params_buffer_size(const struct snd_pcm_hw_params *p) { @@ -959,6 +1057,8 @@ static inline unsigned int params_buffer_size(const struct snd_pcm_hw_params *p) /** * params_buffer_bytes - Get the buffer size (in bytes) from the hw params * @p: hw params + * + * Return: the buffer size in bytes */ static inline unsigned int params_buffer_bytes(const struct snd_pcm_hw_params *p) { @@ -1063,9 +1163,21 @@ int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, const struct snd_pcm_ops *ops); -void snd_pcm_set_sync(struct snd_pcm_substream *substream); +void snd_pcm_set_sync_per_card(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, + const unsigned char *id, unsigned int len); +/** + * snd_pcm_set_sync - set the PCM sync id + * @substream: the pcm substream + * + * Use the default PCM sync identifier for the specific card. + */ +static inline void snd_pcm_set_sync(struct snd_pcm_substream *substream) +{ + substream->runtime->std_sync_id = true; +} int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); +void snd_pcm_period_elapsed_under_stream_lock(struct snd_pcm_substream *substream); void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); snd_pcm_sframes_t __snd_pcm_lib_xfer(struct snd_pcm_substream *substream, void *buf, bool interleaved, @@ -1139,8 +1251,6 @@ unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate); unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit); unsigned int snd_pcm_rate_mask_intersect(unsigned int rates_a, unsigned int rates_b); -unsigned int snd_pcm_rate_range_to_bits(unsigned int rate_min, - unsigned int rate_max); /** * snd_pcm_set_runtime_buffer - Set the PCM runtime buffer @@ -1203,68 +1313,61 @@ void snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); -void snd_pcm_set_managed_buffer(struct snd_pcm_substream *substream, int type, - struct device *data, size_t size, size_t max); -void snd_pcm_set_managed_buffer_all(struct snd_pcm *pcm, int type, - struct device *data, - size_t size, size_t max); - -int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream, - size_t size, gfp_t gfp_flags); -int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream); -struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream, - unsigned long offset); +int snd_pcm_set_managed_buffer(struct snd_pcm_substream *substream, int type, + struct device *data, size_t size, size_t max); +int snd_pcm_set_managed_buffer_all(struct snd_pcm *pcm, int type, + struct device *data, + size_t size, size_t max); + /** - * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer - * @substream: the substream to allocate the buffer to - * @size: the requested buffer size, in bytes + * snd_pcm_set_fixed_buffer - Preallocate and set up the fixed size PCM buffer + * @substream: the pcm substream instance + * @type: DMA type (SNDRV_DMA_TYPE_*) + * @data: DMA type dependent data + * @size: the requested pre-allocation size in bytes * - * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is - * contiguous in kernel virtual space, but not in physical memory. Use this - * if the buffer is accessed by kernel code but not by device DMA. + * This is a variant of snd_pcm_set_managed_buffer(), but this pre-allocates + * only the given sized buffer and doesn't allow re-allocation nor dynamic + * allocation of a larger buffer unlike the standard one. + * The function may return -ENOMEM error, hence the caller must check it. * - * Return: 1 if the buffer was changed, 0 if not changed, or a negative error - * code. + * Return: zero if successful, or a negative error code */ -static inline int snd_pcm_lib_alloc_vmalloc_buffer - (struct snd_pcm_substream *substream, size_t size) +static inline int __must_check +snd_pcm_set_fixed_buffer(struct snd_pcm_substream *substream, int type, + struct device *data, size_t size) { - return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size, - GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO); + return snd_pcm_set_managed_buffer(substream, type, data, size, 0); } /** - * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer - * @substream: the substream to allocate the buffer to - * @size: the requested buffer size, in bytes + * snd_pcm_set_fixed_buffer_all - Preallocate and set up the fixed size PCM buffer + * @pcm: the pcm instance + * @type: DMA type (SNDRV_DMA_TYPE_*) + * @data: DMA type dependent data + * @size: the requested pre-allocation size in bytes * - * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses - * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory. + * Apply the set up of the fixed buffer via snd_pcm_set_fixed_buffer() for + * all substream. If any of allocation fails, it returns -ENOMEM, hence the + * caller must check the return value. * - * Return: 1 if the buffer was changed, 0 if not changed, or a negative error - * code. + * Return: zero if successful, or a negative error code */ -static inline int snd_pcm_lib_alloc_vmalloc_32_buffer - (struct snd_pcm_substream *substream, size_t size) +static inline int __must_check +snd_pcm_set_fixed_buffer_all(struct snd_pcm *pcm, int type, + struct device *data, size_t size) { - return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size, - GFP_KERNEL | GFP_DMA32 | __GFP_ZERO); + return snd_pcm_set_managed_buffer_all(pcm, type, data, size, 0); } #define snd_pcm_get_dma_buf(substream) ((substream)->runtime->dma_buffer_p) -#ifdef CONFIG_SND_DMA_SGBUF -/* - * SG-buffer handling - */ -#define snd_pcm_substream_sgbuf(substream) \ - snd_pcm_get_dma_buf(substream)->private_data -#endif /* SND_DMA_SGBUF */ - /** * snd_pcm_sgbuf_get_addr - Get the DMA address at the corresponding offset * @substream: PCM substream * @ofs: byte offset + * + * Return: DMA address */ static inline dma_addr_t snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) @@ -1273,22 +1376,13 @@ snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) } /** - * snd_pcm_sgbuf_get_ptr - Get the virtual address at the corresponding offset - * @substream: PCM substream - * @ofs: byte offset - */ -static inline void * -snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) -{ - return snd_sgbuf_get_ptr(snd_pcm_get_dma_buf(substream), ofs); -} - -/** - * snd_pcm_sgbuf_chunk_size - Compute the max size that fits within the contig. - * page from the given size + * snd_pcm_sgbuf_get_chunk_size - Compute the max size that fits within the + * contig. page from the given size * @substream: PCM substream * @ofs: byte offset * @size: byte size to examine + * + * Return: chunk size */ static inline unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, @@ -1297,30 +1391,6 @@ snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, return snd_sgbuf_get_chunk_size(snd_pcm_get_dma_buf(substream), ofs, size); } -/** - * snd_pcm_mmap_data_open - increase the mmap counter - * @area: VMA - * - * PCM mmap callback should handle this counter properly - */ -static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) -{ - struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; - atomic_inc(&substream->mmap_count); -} - -/** - * snd_pcm_mmap_data_close - decrease the mmap counter - * @area: VMA - * - * PCM mmap callback should handle this counter properly - */ -static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) -{ - struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; - atomic_dec(&substream->mmap_count); -} - int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, struct vm_area_struct *area); /* mmap for io-memory area */ @@ -1332,6 +1402,8 @@ int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_s #define snd_pcm_lib_mmap_iomem NULL #endif +void snd_pcm_runtime_buffer_set_silence(struct snd_pcm_runtime *runtime); + /** * snd_pcm_limit_isa_dma_size - Get the max size fitting with ISA DMA transfer * @dma: DMA number @@ -1354,6 +1426,20 @@ static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) const char *snd_pcm_format_name(snd_pcm_format_t format); /** + * snd_pcm_direction_name - Get a string naming the direction of a stream + * @direction: Stream's direction, one of SNDRV_PCM_STREAM_XXX + * + * Returns a string naming the direction of the stream. + */ +static inline const char *snd_pcm_direction_name(int direction) +{ + if (direction == SNDRV_PCM_STREAM_PLAYBACK) + return "Playback"; + else + return "Capture"; +} + +/** * snd_pcm_stream_str - Get a string naming the direction of a stream * @substream: the pcm substream instance * @@ -1361,10 +1447,7 @@ const char *snd_pcm_format_name(snd_pcm_format_t format); */ static inline const char *snd_pcm_stream_str(struct snd_pcm_substream *substream) { - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) - return "Playback"; - else - return "Capture"; + return snd_pcm_direction_name(substream->stream); } /* @@ -1391,6 +1474,8 @@ struct snd_pcm_chmap { * snd_pcm_chmap_substream - get the PCM substream assigned to the given chmap info * @info: chmap information * @idx: the substream number index + * + * Return: the matched PCM substream, or NULL if not found */ static inline struct snd_pcm_substream * snd_pcm_chmap_substream(struct snd_pcm_chmap *info, unsigned int idx) @@ -1421,6 +1506,8 @@ int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, /** * pcm_format_to_bits - Strong-typed conversion of pcm_format to bitwise * @pcm_format: PCM format + * + * Return: 64bit mask corresponding to the given PCM format */ static inline u64 pcm_format_to_bits(snd_pcm_format_t pcm_format) { @@ -1444,6 +1531,12 @@ static inline u64 pcm_format_to_bits(snd_pcm_format_t pcm_format) #define pcm_dbg(pcm, fmt, args...) \ dev_dbg((pcm)->card->dev, fmt, ##args) +/* helpers for copying between iov_iter and iomem */ +size_t copy_to_iter_fromio(const void __iomem *src, size_t bytes, + struct iov_iter *iter) __must_check; +size_t copy_from_iter_toio(void __iomem *dst, size_t bytes, + struct iov_iter *iter) __must_check; + struct snd_pcm_status64 { snd_pcm_state_t state; /* stream state */ u8 rsvd[4]; |