diff options
Diffstat (limited to 'kernel/dma/ops_helpers.c')
| -rw-r--r-- | kernel/dma/ops_helpers.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/kernel/dma/ops_helpers.c b/kernel/dma/ops_helpers.c index af4a6ef48ce0..9afd569eadb9 100644 --- a/kernel/dma/ops_helpers.c +++ b/kernel/dma/ops_helpers.c @@ -4,6 +4,7 @@ * the allocated memory contains normal pages in the direct kernel mapping. */ #include <linux/dma-map-ops.h> +#include <linux/iommu-dma.h> static struct page *dma_common_vaddr_to_page(void *cpu_addr) { @@ -70,8 +71,12 @@ struct page *dma_common_alloc_pages(struct device *dev, size_t size, if (!page) return NULL; - *dma_handle = ops->map_page(dev, page, 0, size, dir, - DMA_ATTR_SKIP_CPU_SYNC); + if (use_dma_iommu(dev)) + *dma_handle = iommu_dma_map_page(dev, page, 0, size, dir, + DMA_ATTR_SKIP_CPU_SYNC); + else + *dma_handle = ops->map_page(dev, page, 0, size, dir, + DMA_ATTR_SKIP_CPU_SYNC); if (*dma_handle == DMA_MAPPING_ERROR) { dma_free_contiguous(dev, page, size); return NULL; @@ -86,7 +91,10 @@ void dma_common_free_pages(struct device *dev, size_t size, struct page *page, { const struct dma_map_ops *ops = get_dma_ops(dev); - if (ops->unmap_page) + if (use_dma_iommu(dev)) + iommu_dma_unmap_page(dev, dma_handle, size, dir, + DMA_ATTR_SKIP_CPU_SYNC); + else if (ops->unmap_page) ops->unmap_page(dev, dma_handle, size, dir, DMA_ATTR_SKIP_CPU_SYNC); dma_free_contiguous(dev, page, size); |