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ALSA: Clean up SG-buffer helper functions and macros

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Clean up SG-buffer helper functions and macros.  Helpers take substream
as arguments now.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Takashi Iwai 2008-08-21 13:00:13 +02:00 • committed by Jaroslav Kysela
parent 46480b3a5f
commit 77a23f2695
15 changed files with 91 additions and 103 deletions
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12
include/sound/memalloc.h
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@ -65,6 +65,11 @@ struct snd_dma_buffer {
/*
* Scatter-Gather generic device pages
*/
void *snd_malloc_sgbuf_pages(struct device *device,
size_t size, struct snd_dma_buffer *dmab,
size_t *res_size);
int snd_free_sgbuf_pages(struct snd_dma_buffer *dmab);
struct snd_sg_page {
void *buf;
dma_addr_t addr;
@ -95,6 +100,13 @@ static inline dma_addr_t snd_sgbuf_get_addr(struct snd_sg_buf *sgbuf, size_t off
return sgbuf->table[offset >> PAGE_SHIFT].addr + offset % PAGE_SIZE;
}
/*
* return the virtual address at the corresponding offset
*/
static inline void *snd_sgbuf_get_ptr(struct snd_sg_buf *sgbuf, size_t offset)
{
return sgbuf->table[offset >> PAGE_SHIFT].buf + offset % PAGE_SIZE;
}
/* allocate/release a buffer */
int snd_dma_alloc_pages(int type, struct device *dev, size_t size,