This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / asm-i386 / mach-xen / asm / dma-mapping.h

diff --git a/include/asm-i386/mach-xen/asm/dma-mapping.h b/include/asm-i386/mach-xen/asm/dma-mapping.h
new file mode 100644 (file)
index 0000000..17ef0c2
--- /dev/null
+++ b/include/asm-i386/mach-xen/asm/dma-mapping.h
@@ -0,0 +1,152 @@
+#ifndef _ASM_I386_DMA_MAPPING_H
+#define _ASM_I386_DMA_MAPPING_H
+
+/*
+ * IOMMU interface. See Documentation/DMA-mapping.txt and DMA-API.txt for
+ * documentation.
+ */
+
+#include <linux/config.h>
+#include <linux/mm.h>
+#include <asm/cache.h>
+#include <asm/io.h>
+#include <asm/scatterlist.h>
+#include <asm/swiotlb.h>
+
+static inline int
+address_needs_mapping(struct device *hwdev, dma_addr_t addr)
+{
+       dma_addr_t mask = 0xffffffff;
+       /* If the device has a mask, use it, otherwise default to 32 bits */
+       if (hwdev && hwdev->dma_mask)
+               mask = *hwdev->dma_mask;
+       return (addr & ~mask) != 0;
+}
+
+static inline int
+range_straddles_page_boundary(void *p, size_t size)
+{
+       extern unsigned long *contiguous_bitmap;
+       return (((((unsigned long)p & ~PAGE_MASK) + size) > PAGE_SIZE) &&
+               !test_bit(__pa(p) >> PAGE_SHIFT, contiguous_bitmap));
+}
+
+#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 dma_addr_t
+dma_map_single(struct device *dev, void *ptr, size_t size,
+              enum dma_data_direction direction);
+
+extern void
+dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+                enum dma_data_direction direction);
+
+extern int dma_map_sg(struct device *hwdev, struct scatterlist *sg,
+                     int nents, enum dma_data_direction direction);
+extern void dma_unmap_sg(struct device *hwdev, struct scatterlist *sg,
+                        int nents, enum dma_data_direction direction);
+
+extern dma_addr_t
+dma_map_page(struct device *dev, struct page *page, unsigned long offset,
+            size_t size, enum dma_data_direction direction);
+
+extern void
+dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
+              enum dma_data_direction direction);
+
+extern void
+dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
+                       enum dma_data_direction direction);
+
+extern void
+dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
+                           enum dma_data_direction direction);
+
+static inline void
+dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
+                             unsigned long offset, size_t size,
+                             enum dma_data_direction direction)
+{
+       dma_sync_single_for_cpu(dev, dma_handle+offset, size, direction);
+}
+
+static inline void
+dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
+                                unsigned long offset, size_t size,
+                                enum dma_data_direction direction)
+{
+       dma_sync_single_for_device(dev, dma_handle+offset, size, direction);
+}
+
+static inline void
+dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
+                   enum dma_data_direction direction)
+{
+       if (swiotlb)
+               swiotlb_sync_sg_for_cpu(dev,sg,nelems,direction);
+       flush_write_buffers();
+}
+
+static inline void
+dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
+                   enum dma_data_direction direction)
+{
+       if (swiotlb)
+               swiotlb_sync_sg_for_device(dev,sg,nelems,direction);
+       flush_write_buffers();
+}
+
+extern int
+dma_mapping_error(dma_addr_t dma_addr);
+
+extern int
+dma_supported(struct device *dev, u64 mask);
+
+static inline int
+dma_set_mask(struct device *dev, u64 mask)
+{
+       if(!dev->dma_mask || !dma_supported(dev, mask))
+               return -EIO;
+
+       *dev->dma_mask = mask;
+
+       return 0;
+}
+
+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 (1 << INTERNODE_CACHE_SHIFT);
+}
+
+#define dma_is_consistent(d)   (1)
+
+static inline void
+dma_cache_sync(void *vaddr, size_t size,
+              enum dma_data_direction direction)
+{
+       flush_write_buffers();
+}
+
+#define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
+extern int
+dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
+                           dma_addr_t device_addr, size_t size, int flags);
+
+extern void
+dma_release_declared_memory(struct device *dev);
+
+extern void *
+dma_mark_declared_memory_occupied(struct device *dev,
+                                 dma_addr_t device_addr, size_t size);
+
+#endif