+#ifndef _ASM_DMA_MAPPING_H_
+#define _ASM_DMA_MAPPING_H_
+
+/*
+ * IOMMU interface. See Documentation/DMA-mapping.txt and DMA-API.txt for
+ * documentation.
+ */
+
+#include <linux/scatterlist.h>
+#include <asm/io.h>
+#include <asm/swiotlb.h>
+
+extern dma_addr_t bad_dma_address;
+extern int iommu_merge;
+extern struct device fallback_dev;
+extern int panic_on_overflow;
+extern int force_iommu;
+
+struct dma_mapping_ops {
+ int (*mapping_error)(struct device *dev,
+ dma_addr_t dma_addr);
+ 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);
+ dma_addr_t (*map_single)(struct device *hwdev, phys_addr_t ptr,
+ size_t size, int direction);
+ /* like map_single, but doesn't check the device mask */
+ dma_addr_t (*map_simple)(struct device *hwdev, phys_addr_t ptr,
+ size_t size, int direction);
+ void (*unmap_single)(struct device *dev, dma_addr_t addr,
+ size_t size, int direction);
+ void (*sync_single_for_cpu)(struct device *hwdev,
+ dma_addr_t dma_handle, size_t size,
+ int direction);
+ void (*sync_single_for_device)(struct device *hwdev,
+ dma_addr_t dma_handle, size_t size,
+ int direction);
+ void (*sync_single_range_for_cpu)(struct device *hwdev,
+ dma_addr_t dma_handle, unsigned long offset,
+ size_t size, int direction);
+ void (*sync_single_range_for_device)(struct device *hwdev,
+ dma_addr_t dma_handle, unsigned long offset,
+ size_t size, int direction);
+ void (*sync_sg_for_cpu)(struct device *hwdev,
+ struct scatterlist *sg, int nelems,
+ int direction);
+ void (*sync_sg_for_device)(struct device *hwdev,
+ struct scatterlist *sg, int nelems,
+ int direction);
+ int (*map_sg)(struct device *hwdev, struct scatterlist *sg,
+ int nents, int direction);
+ void (*unmap_sg)(struct device *hwdev,
+ struct scatterlist *sg, int nents,
+ int direction);
+ int (*dma_supported)(struct device *hwdev, u64 mask);
+ int is_phys;
+};
+
+extern struct dma_mapping_ops *dma_ops;
+
+static inline struct dma_mapping_ops *get_dma_ops(struct device *dev)
+{
#ifdef CONFIG_X86_32
-# include "dma-mapping_32.h"
+ return dma_ops;
#else
-# include "dma-mapping_64.h"
+ if (unlikely(!dev) || !dev->archdata.dma_ops)
+ return dma_ops;
+ else
+ return dev->archdata.dma_ops;
+#endif
+}
+
+/* Make sure we keep the same behaviour */
+static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+#ifdef CONFIG_X86_32
+ return 0;
+#else
+ struct dma_mapping_ops *ops = get_dma_ops(dev);
+ if (ops->mapping_error)
+ return ops->mapping_error(dev, dma_addr);
+
+ return (dma_addr == bad_dma_address);
+#endif
+}
+
+#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
+#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
+
+void *dma_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t flag);
+
+void dma_free_coherent(struct device *dev, size_t size,
+ void *vaddr, dma_addr_t dma_handle);
+
+
+extern int dma_supported(struct device *hwdev, u64 mask);
+extern int dma_set_mask(struct device *dev, u64 mask);
+
+static inline dma_addr_t
+dma_map_single(struct device *hwdev, void *ptr, size_t size,
+ int direction)
+{
+ struct dma_mapping_ops *ops = get_dma_ops(hwdev);
+
+ BUG_ON(!valid_dma_direction(direction));
+ return ops->map_single(hwdev, virt_to_phys(ptr), size, direction);
+}
+
+static inline void
+dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size,
+ int direction)
+{
+ struct dma_mapping_ops *ops = get_dma_ops(dev);
+
+ BUG_ON(!valid_dma_direction(direction));
+ if (ops->unmap_single)
+ ops->unmap_single(dev, addr, size, direction);
+}
+
+static inline int
+dma_map_sg(struct device *hwdev, struct scatterlist *sg,
+ int nents, int direction)
+{
+ struct dma_mapping_ops *ops = get_dma_ops(hwdev);
+
+ BUG_ON(!valid_dma_direction(direction));
+ return ops->map_sg(hwdev, sg, nents, direction);
+}
+
+static inline void
+dma_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
+ int direction)
+{
+ struct dma_mapping_ops *ops = get_dma_ops(hwdev);
+
+ BUG_ON(!valid_dma_direction(direction));
+ if (ops->unmap_sg)
+ ops->unmap_sg(hwdev, sg, nents, direction);
+}
+
+static inline void
+dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
+ size_t size, int direction)
+{
+ struct dma_mapping_ops *ops = get_dma_ops(hwdev);
+
+ BUG_ON(!valid_dma_direction(direction));
+ if (ops->sync_single_for_cpu)
+ ops->sync_single_for_cpu(hwdev, dma_handle, size, direction);
+ flush_write_buffers();
+}
+
+static inline void
+dma_sync_single_for_device(struct device *hwdev, dma_addr_t dma_handle,
+ size_t size, int direction)
+{
+ struct dma_mapping_ops *ops = get_dma_ops(hwdev);
+
+ BUG_ON(!valid_dma_direction(direction));
+ if (ops->sync_single_for_device)
+ ops->sync_single_for_device(hwdev, dma_handle, size, direction);
+ flush_write_buffers();
+}
+
+static inline void
+dma_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
+ unsigned long offset, size_t size, int direction)
+{
+ struct dma_mapping_ops *ops = get_dma_ops(hwdev);
+
+ BUG_ON(!valid_dma_direction(direction));
+ if (ops->sync_single_range_for_cpu)
+ ops->sync_single_range_for_cpu(hwdev, dma_handle, offset,
+ size, direction);
+ flush_write_buffers();
+}
+
+static inline void
+dma_sync_single_range_for_device(struct device *hwdev, dma_addr_t dma_handle,
+ unsigned long offset, size_t size,
+ int direction)
+{
+ struct dma_mapping_ops *ops = get_dma_ops(hwdev);
+
+ BUG_ON(!valid_dma_direction(direction));
+ if (ops->sync_single_range_for_device)
+ ops->sync_single_range_for_device(hwdev, dma_handle,
+ offset, size, direction);
+ flush_write_buffers();
+}
+
+static inline void
+dma_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
+ int nelems, int direction)
+{
+ struct dma_mapping_ops *ops = get_dma_ops(hwdev);
+
+ BUG_ON(!valid_dma_direction(direction));
+ if (ops->sync_sg_for_cpu)
+ ops->sync_sg_for_cpu(hwdev, sg, nelems, direction);
+ flush_write_buffers();
+}
+
+static inline void
+dma_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
+ int nelems, int direction)
+{
+ struct dma_mapping_ops *ops = get_dma_ops(hwdev);
+
+ BUG_ON(!valid_dma_direction(direction));
+ if (ops->sync_sg_for_device)
+ ops->sync_sg_for_device(hwdev, sg, nelems, direction);
+
+ flush_write_buffers();
+}
+
+static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
+ size_t offset, size_t size,
+ int direction)
+{
+ struct dma_mapping_ops *ops = get_dma_ops(dev);
+
+ BUG_ON(!valid_dma_direction(direction));
+ return ops->map_single(dev, page_to_phys(page) + offset,
+ size, direction);
+}
+
+static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
+ size_t size, int direction)
+{
+ dma_unmap_single(dev, addr, size, direction);
+}
+
+static inline void
+dma_cache_sync(struct device *dev, void *vaddr, size_t size,
+ enum dma_data_direction dir)
+{
+ flush_write_buffers();
+}
+
+static inline int dma_get_cache_alignment(void)
+{
+ /* no easy way to get cache size on all x86, so return the
+ * maximum possible, to be safe */
+ return boot_cpu_data.x86_clflush_size;
+}
+
+#define dma_is_consistent(d, h) (1)
+
+#include <asm-generic/dma-coherent.h>
#endif
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