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author | Takashi Iwai <tiwai@suse.de> | 2010-08-18 15:17:30 +0200 |
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committer | Takashi Iwai <tiwai@suse.de> | 2010-08-18 15:17:30 +0200 |
commit | 6ab561c8aab2e4af535f09adbc6253f958536848 (patch) | |
tree | 37846adb4ea106485720d113e252d71d615c23ed /include/media/videobuf-dma-sg.h | |
parent | 4f4e8f69895c8696a4bcc751817d4b186023ac44 (diff) | |
parent | cbaa9f60d5d5c3af10f94e0d49789d5b82341a4a (diff) | |
download | linux-stable-6ab561c8aab2e4af535f09adbc6253f958536848.tar.gz linux-stable-6ab561c8aab2e4af535f09adbc6253f958536848.tar.bz2 linux-stable-6ab561c8aab2e4af535f09adbc6253f958536848.zip |
Merge branch 'topic/isa' into topic/misc
Diffstat (limited to 'include/media/videobuf-dma-sg.h')
-rw-r--r-- | include/media/videobuf-dma-sg.h | 39 |
1 files changed, 13 insertions, 26 deletions
diff --git a/include/media/videobuf-dma-sg.h b/include/media/videobuf-dma-sg.h index a195f3b9c00a..97e07f46a0fa 100644 --- a/include/media/videobuf-dma-sg.h +++ b/include/media/videobuf-dma-sg.h @@ -25,23 +25,6 @@ /* --------------------------------------------------------------------- */ /* - * Return a scatterlist for some page-aligned vmalloc()'ed memory - * block (NULL on errors). Memory for the scatterlist is allocated - * using kmalloc. The caller must free the memory. - */ -struct scatterlist *videobuf_vmalloc_to_sg(unsigned char *virt, int nr_pages); - -/* - * Return a scatterlist for a an array of userpages (NULL on errors). - * Memory for the scatterlist is allocated using kmalloc. The caller - * must free the memory. - */ -struct scatterlist *videobuf_pages_to_sg(struct page **pages, int nr_pages, - int offset); - -/* --------------------------------------------------------------------- */ - -/* * A small set of helper functions to manage buffers (both userland * and kernel) for DMA. * @@ -68,7 +51,7 @@ struct videobuf_dmabuf { struct page **pages; /* for kernel buffers */ - void *vmalloc; + void *vaddr; /* for overlay buffers (pci-pci dma) */ dma_addr_t bus_addr; @@ -87,6 +70,16 @@ struct videobuf_dma_sg_memory { struct videobuf_dmabuf dma; }; +/* + * Scatter-gather DMA buffer API. + * + * These functions provide a simple way to create a page list and a + * scatter-gather list from a kernel, userspace of physical address and map the + * memory for DMA operation. + * + * Despite the name, this is totally unrelated to videobuf, except that + * videobuf-dma-sg uses the same API internally. + */ void videobuf_dma_init(struct videobuf_dmabuf *dma); int videobuf_dma_init_user(struct videobuf_dmabuf *dma, int direction, unsigned long data, unsigned long size); @@ -96,8 +89,8 @@ int videobuf_dma_init_overlay(struct videobuf_dmabuf *dma, int direction, dma_addr_t addr, int nr_pages); int videobuf_dma_free(struct videobuf_dmabuf *dma); -int videobuf_dma_map(struct videobuf_queue *q, struct videobuf_dmabuf *dma); -int videobuf_dma_unmap(struct videobuf_queue *q, struct videobuf_dmabuf *dma); +int videobuf_dma_map(struct device *dev, struct videobuf_dmabuf *dma); +int videobuf_dma_unmap(struct device *dev, struct videobuf_dmabuf *dma); struct videobuf_dmabuf *videobuf_to_dma(struct videobuf_buffer *buf); void *videobuf_sg_alloc(size_t size); @@ -111,11 +104,5 @@ void videobuf_queue_sg_init(struct videobuf_queue *q, unsigned int msize, void *priv); -/*FIXME: these variants are used only on *-alsa code, where videobuf is - * used without queue - */ -int videobuf_sg_dma_map(struct device *dev, struct videobuf_dmabuf *dma); -int videobuf_sg_dma_unmap(struct device *dev, struct videobuf_dmabuf *dma); - #endif /* _VIDEOBUF_DMA_SG_H */ |