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>
diff --git a/include/sound/memalloc.h b/include/sound/memalloc.h
index ae2921d..96d0dc1 100644
--- a/include/sound/memalloc.h
+++ b/include/sound/memalloc.h
@@ -65,6 +65,11 @@
/*
* 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 @@
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,