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-rw-r--r--include/sound/memalloc.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/include/sound/memalloc.h b/include/sound/memalloc.h
index ae2921d9ddcc..96d0dc171459 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;
@@ -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,