Hi.
On Mon, Jun 20, 2011 at 4:50 PM, Marek Szyprowski
<m.szyprowski@xxxxxxxxxxx> wrote:
> struct dma_map_ops {
> - void* (*alloc_coherent)(struct device *dev, size_t size,
> - dma_addr_t *dma_handle, gfp_t gfp);
> - void (*free_coherent)(struct device *dev, size_t size,
> - void *vaddr, dma_addr_t dma_handle);
> + void* (*alloc)(struct device *dev, size_t size,
> + dma_addr_t *dma_handle, gfp_t gfp,
> + struct dma_attrs *attrs);
> + void (*free)(struct device *dev, size_t size,
> + void *vaddr, dma_addr_t dma_handle,
> + struct dma_attrs *attrs);
> + int (*mmap)(struct device *, struct vm_area_struct *,
> + void *, dma_addr_t, size_t, struct dma_attrs *attrs);
> +
> dma_addr_t (*map_page)(struct device *dev, struct page *page,
> unsigned long offset, size_t size,
> enum dma_data_direction dir,
I still don't agree with your idea that change alloc_coherent() with alloc().
As I said before, we actually do not need dma_alloc_writecombine() anymore
because it is not different from dma_alloc_coherent() in ARM.
Most of other architectures do not have dma_alloc_writecombine().
If you want dma_alloc_coherent() to allocate user virtual address,
I believe that it is also available with mmap() you introduced.
Regards,
Cho KyongHo.
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