diff options
Diffstat (limited to 'include/sound/pcm.h')
| -rw-r--r-- | include/sound/pcm.h | 67 |
1 files changed, 43 insertions, 24 deletions
diff --git a/include/sound/pcm.h b/include/sound/pcm.h index 2e1200d17d0c..33451f8ff755 100644 --- a/include/sound/pcm.h +++ b/include/sound/pcm.h @@ -1066,6 +1066,7 @@ void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, void snd_pcm_set_sync(struct snd_pcm_substream *substream); 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, @@ -1203,11 +1204,48 @@ 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_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_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 + * + * 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. + */ +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_set_managed_buffer(substream, type, data, size, 0); +} + +/** + * 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 + * + * 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. + */ +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_set_managed_buffer_all(pcm, type, data, size, 0); +} int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream, size_t size, gfp_t gfp_flags); @@ -1253,14 +1291,6 @@ static inline int snd_pcm_lib_alloc_vmalloc_32_buffer #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 @@ -1273,17 +1303,6 @@ 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_get_chunk_size - Compute the max size that fits within the * contig. page from the given size * @substream: PCM substream |