diff options
Diffstat (limited to 'include/sound/memalloc.h')
| -rw-r--r-- | include/sound/memalloc.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/include/sound/memalloc.h b/include/sound/memalloc.h index ae2921d9ddc..d787a6b4a10 100644 --- a/include/sound/memalloc.h +++ b/include/sound/memalloc.h @@ -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; @@ -92,9 +97,18 @@ static inline unsigned int snd_sgbuf_aligned_pages(size_t size) */ static inline dma_addr_t snd_sgbuf_get_addr(struct snd_sg_buf *sgbuf, size_t offset) { - return sgbuf->table[offset >> PAGE_SHIFT].addr + offset % PAGE_SIZE; + dma_addr_t addr = sgbuf->table[offset >> PAGE_SHIFT].addr; + addr &= PAGE_MASK; + return 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, |