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authorTakashi Iwai <tiwai@suse.de>2008-08-21 13:00:13 +0200
committerJaroslav Kysela <perex@perex.cz>2008-08-25 09:57:18 +0200
commit77a23f2695bb2de0cd74599400dc55109c531b72 (patch)
tree4960195e04016928dea83deb85e0f3bf97024a8a /include/sound/memalloc.h
parent46480b3a5f88f20dbf25d95fe74d7b4798d5bc86 (diff)
ALSA: Clean up SG-buffer helper functions and macros
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>
Diffstat (limited to 'include/sound/memalloc.h')
-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 ae2921d9ddc..96d0dc17145 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,