Merge branch 'core-iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[safe/jmp/linux-2.6] / include / sound / memalloc.h

diff --git a/include/sound/memalloc.h b/include/sound/memalloc.h
index ae2921d..c425062 100644 (file)
--- a/include/sound/memalloc.h
+++ b/include/sound/memalloc.h
@@ -37,7 +37,6 @@ struct snd_dma_device {
 #ifndef snd_dma_pci_data
 #define snd_dma_pci_data(pci)  (&(pci)->dev)
 #define snd_dma_isa_data()     NULL
-#define snd_dma_sbus_data(sbus)        ((struct device *)(sbus))
 #define snd_dma_continuous_data(x)     ((struct device *)(unsigned long)(x))
 #endif
 
@@ -48,8 +47,11 @@ struct snd_dma_device {
 #define SNDRV_DMA_TYPE_UNKNOWN         0       /* not defined */
 #define SNDRV_DMA_TYPE_CONTINUOUS      1       /* continuous no-DMA memory */
 #define SNDRV_DMA_TYPE_DEV             2       /* generic device continuous */
+#ifdef CONFIG_SND_DMA_SGBUF
 #define SNDRV_DMA_TYPE_DEV_SG          3       /* generic device SG-buffer */
-#define SNDRV_DMA_TYPE_SBUS            4       /* SBUS continuous */
+#else
+#define SNDRV_DMA_TYPE_DEV_SG  SNDRV_DMA_TYPE_DEV /* no SG-buf support */
+#endif
 
 /*
  * info for buffer allocation
@@ -62,9 +64,15 @@ struct snd_dma_buffer {
        void *private_data;     /* private for allocator; don't touch */
 };
 
+#ifdef CONFIG_SND_DMA_SGBUF
 /*
  * 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 +100,19 @@ 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;
+}
+#endif /* CONFIG_SND_DMA_SGBUF */
 
 /* allocate/release a buffer */
 int snd_dma_alloc_pages(int type, struct device *dev, size_t size,