Hi Will,
On Mon, 10 Jun 2013 20:34:39 +0200
Will Deacon <will.deacon@xxxxxxx> wrote:
...
> @@ -1636,13 +1636,27 @@ static dma_addr_t arm_coherent_iommu_map_page(struct device *dev, struct page *p
> {
> struct dma_iommu_mapping *mapping = dev->archdata.mapping;
> dma_addr_t dma_addr;
> - int ret, len = PAGE_ALIGN(size + offset);
> + int ret, prot, len = PAGE_ALIGN(size + offset);
>
> dma_addr = __alloc_iova(mapping, len);
> if (dma_addr == DMA_ERROR_CODE)
> return dma_addr;
>
> - ret = iommu_map(mapping->domain, dma_addr, page_to_phys(page), len, 0);
> + switch (dir) {
> + case DMA_BIDIRECTIONAL:
> + prot = IOMMU_READ | IOMMU_WRITE;
> + break;
> + case DMA_TO_DEVICE:
> + prot = IOMMU_READ;
> + break;
> + case DMA_FROM_DEVICE:
> + prot = IOMMU_WRITE;
> + break;
> + default:
> + prot = 0;
> + }
> +
> + ret = iommu_map(mapping->domain, dma_addr, page_to_phys(page), len, prot);
Do we need similar changes for map_sg case as well? They still passes '0' as prot.
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