-#include <asm-generic/dma-mapping.h>
+#ifndef _ASM_DMA_MAPPING_H
+#define _ASM_DMA_MAPPING_H
+
+#include <asm/cache.h>
+
+#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, int flag);
+
+void dma_free_coherent(struct device *dev, size_t size,
+ void *vaddr, dma_addr_t dma_handle);
+
+#ifdef CONFIG_MAPPED_DMA_IO
+
+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 *dev, 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_unmap_sg(struct device *dev, struct scatterlist *sg,
+ int nhwentries, enum dma_data_direction direction);
+extern void dma_sync_single(struct device *dev, dma_addr_t dma_handle,
+ size_t size, enum dma_data_direction direction);
+extern void dma_sync_single_range(struct device *dev, dma_addr_t dma_handle,
+ unsigned long offset, size_t size, enum dma_data_direction direction);
+extern void dma_sync_sg(struct device *dev, struct scatterlist *sg, int nelems,
+ enum dma_data_direction direction);
+
+#else
+
+static inline dma_addr_t
+dma_map_single(struct device *dev, void *ptr, size_t size,
+ enum dma_data_direction direction)
+{
+ unsigned long addr = (unsigned long) ptr;
+
+ BUG_ON(direction == DMA_NONE);
+
+ dma_cache_wback_inv(addr, size);
+
+ return bus_to_baddr(hwdev->bus, __pa(ptr));
+}
+
+static inline void
+dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+ enum dma_data_direction direction)
+{
+ BUG_ON(direction == DMA_NONE);
+
+ if (direction != DMA_TO_DEVICE) {
+ unsigned long addr;
+
+ addr = baddr_to_bus(hwdev->bus, dma_addr) + PAGE_OFFSET;
+ dma_cache_wback_inv(addr, size);
+ }
+}
+
+static inline int
+dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+ enum dma_data_direction direction)
+{
+ int i;
+
+ BUG_ON(direction == DMA_NONE);
+
+ for (i = 0; i < nents; i++, sg++) {
+ unsigned long addr;
+
+ addr = (unsigned long) page_address(sg->page);
+ if (addr)
+ dma_cache_wback_inv(addr + sg->offset, sg->length);
+ sg->dma_address = (dma_addr_t) bus_to_baddr(hwdev->bus,
+ page_to_phys(sg->page) + sg->offset);
+ }
+
+ return nents;
+}
+
+static inline dma_addr_t
+dma_map_page(struct device *dev, struct page *page, unsigned long offset,
+ size_t size, enum dma_data_direction direction)
+{
+ unsigned long addr;
+
+ BUG_ON(direction == DMA_NONE);
+ addr = (unsigned long) page_address(page) + offset;
+ dma_cache_wback_inv(addr, size);
+
+ return bus_to_baddr(hwdev->bus, page_to_phys(page) + offset);
+}
+
+static inline void
+dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
+ enum dma_data_direction direction)
+{
+ BUG_ON(direction == DMA_NONE);
+
+ if (direction != DMA_TO_DEVICE) {
+ unsigned long addr;
+
+ addr = baddr_to_bus(hwdev->bus, dma_address) + PAGE_OFFSET;
+ dma_cache_wback_inv(addr, size);
+ }
+}
+
+static inline void
+dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
+ enum dma_data_direction direction)
+{
+ int i;
+
+ BUG_ON(direction == DMA_NONE);
+
+ if (direction == DMA_TO_DEVICE)
+ return;
+
+ for (i = 0; i < nhwentries; i++, sg++) {
+ unsigned long addr;
+
+ if (!sg->page)
+ BUG();
+
+ addr = (unsigned long) page_address(sg->page);
+ if (addr)
+ dma_cache_wback_inv(addr + sg->offset, sg->length);
+ }
+}
+
+static inline void
+dma_sync_single(struct device *dev, dma_addr_t dma_handle, size_t size,
+ enum dma_data_direction direction)
+{
+ unsigned long addr;
+
+ if (direction == DMA_NONE)
+ BUG();
+
+ addr = baddr_to_bus(hwdev->bus, dma_handle) + PAGE_OFFSET;
+ dma_cache_wback_inv(addr, size);
+}
+
+static inline void
+dma_sync_single_range(struct device *dev, dma_addr_t dma_handle,
+ unsigned long offset, size_t size,
+ enum dma_data_direction direction)
+{
+ unsigned long addr;
+
+ if (direction == DMA_NONE)
+ BUG();
+
+ addr = baddr_to_bus(hwdev->bus, dma_handle) + PAGE_OFFSET;
+ dma_cache_wback_inv(addr, size);
+}
+
+static inline void
+dma_sync_sg(struct device *dev, struct scatterlist *sg, int nelems,
+ enum dma_data_direction direction)
+{
+#ifdef CONFIG_NONCOHERENT_IO
+ int i;
+#endif
+
+ if (direction == DMA_NONE)
+ BUG();
+
+ /* Make sure that gcc doesn't leave the empty loop body. */
+#ifdef CONFIG_NONCOHERENT_IO
+ for (i = 0; i < nelems; i++, sg++)
+ dma_cache_wback_inv((unsigned long)page_address(sg->page),
+ sg->length);
+#endif
+}
+#endif /* CONFIG_MAPPED_DMA_IO */
+
+static inline int
+dma_supported(struct device *dev, u64 mask)
+{
+ /*
+ * we fall back to GFP_DMA when the mask isn't all 1s,
+ * so we can't guarantee allocations that must be
+ * within a tighter range than GFP_DMA..
+ */
+ if (mask < 0x00ffffff)
+ return 0;
+
+ return 1;
+}
+
+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)
+{
+ /* XXX Largest on any MIPS */
+ return 128;
+}
+
+#ifdef CONFIG_NONCOHERENT_IO
+#define dma_is_consistent(d) (0)
+#else
+#define dma_is_consistent(d) (1)
+#endif
+
+static inline void
+dma_cache_sync(void *vaddr, size_t size,
+ enum dma_data_direction direction)
+{
+ dma_cache_wback_inv((unsigned long)vaddr, size);
+}
+
+#endif /* _ASM_DMA_MAPPING_H */
projects / linux-flexiantxendom0-3.2.10.git / blobdiff