1 files changed, 67 insertions, 0 deletions

diff --git a/include/asm-alpha/dma-mapping.h b/include/asm-alpha/dma-mapping.h
new file mode 100644
index 000000000000..c675f282d6ad
--- /dev/null
+++ b/include/asm-alpha/dma-mapping.h
@@ -0,0 +1,67 @@
+#ifndef _ALPHA_DMA_MAPPING_H
+#define _ALPHA_DMA_MAPPING_H
+
+#include <linux/config.h>
+
+#ifdef CONFIG_PCI
+
+#include <linux/pci.h>
+
+#define dma_map_single(dev, va, size, dir)              \
+                pci_map_single(alpha_gendev_to_pci(dev), va, size, dir)
+#define dma_unmap_single(dev, addr, size, dir)          \
+                pci_unmap_single(alpha_gendev_to_pci(dev), addr, size, dir)
+#define dma_alloc_coherent(dev, size, addr, gfp)        \
+                pci_alloc_consistent(alpha_gendev_to_pci(dev), size, addr)
+#define dma_free_coherent(dev, size, va, addr)          \
+                pci_free_consistent(alpha_gendev_to_pci(dev), size, va, addr)
+#define dma_map_page(dev, page, off, size, dir)         \
+                pci_map_single(alpha_gendev_to_pci(dev), page, off, size, dir)
+#define dma_unmap_page(dev, addr, size, dir)            \
+                pci_unmap_page(alpha_gendev_to_pci(dev), addr, size, dir)
+#define dma_map_sg(dev, sg, nents, dir)                 \
+                pci_map_sg(alpha_gendev_to_pci(dev), sg, nents, dir)
+#define dma_unmap_sg(dev, sg, nents, dir)               \
+                pci_unmap_sg(alpha_gendev_to_pci(dev), sg, nents, dir)
+#define dma_supported(dev, mask)                        \
+                pci_dma_supported(alpha_gendev_to_pci(dev), mask)
+#define dma_mapping_error(addr)                         \
+                pci_dma_mapping_error(addr)
+
+#else   /* no PCI - no IOMMU. */
+
+void *dma_alloc_coherent(struct device *dev, size_t size,
+                         dma_addr_t *dma_handle, int gfp);
+int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+               enum dma_data_direction direction);
+
+#define dma_free_coherent(dev, size, va, addr)          \
+                free_pages((unsigned long)va, get_order(size))
+#define dma_supported(dev, mask)                (mask < 0x00ffffffUL ? 0 : 1)
+#define dma_map_single(dev, va, size, dir)      virt_to_phys(va)
+#define dma_map_page(dev, page, off, size, dir) (page_to_pa(page) + off)
+
+#define dma_unmap_single(dev, addr, size, dir)  do { } while (0)
+#define dma_unmap_page(dev, addr, size, dir)    do { } while (0)
+#define dma_unmap_sg(dev, sg, nents, dir)       do { } while (0)
+
+#define dma_mapping_error(addr)  (0)
+
+#endif  /* !CONFIG_PCI */
+
+#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)
+#define dma_is_consistent(dev)                  (1)
+
+int dma_set_mask(struct device *dev, u64 mask);
+
+#define dma_sync_single_for_cpu(dev, addr, size, dir)     do { } while (0)
+#define dma_sync_single_for_device(dev, addr, size, dir)  do { } while (0)
+#define dma_sync_single_range(dev, addr, off, size, dir)  do { } while (0)
+#define dma_sync_sg_for_cpu(dev, sg, nents, dir)          do { } while (0)
+#define dma_sync_sg_for_device(dev, sg, nents, dir)       do { } while (0)
+#define dma_cache_sync(va, size, dir)                     do { } while (0)
+
+#define dma_get_cache_alignment()                         L1_CACHE_BYTES
+
+#endif  /* _ALPHA_DMA_MAPPING_H */