1 files changed, 255 insertions, 0 deletions
diff --git a/arch/mips/mm/dma-coherent.c b/arch/mips/mm/dma-coherent.c
new file mode 100644
index 000000000000..97a50d38c98f
--- /dev/null
+++ b/arch/mips/mm/dma-coherent.c
@@ -0,0 +1,255 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2000  Ani Joshi <ajoshi@unixbox.com>
+ * Copyright (C) 2000, 2001  Ralf Baechle <ralf@gnu.org>
+ * swiped from i386, and cloned for MIPS by Geert, polished by Ralf.
+ */
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/pci.h>
+
+#include <asm/cache.h>
+#include <asm/io.h>
+
+void *dma_alloc_noncoherent(struct device *dev, size_t size,
+	dma_addr_t * dma_handle, int gfp)
+{
+	void *ret;
+	/* ignore region specifiers */
+	gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
+
+	if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff))
+		gfp |= GFP_DMA;
+	ret = (void *) __get_free_pages(gfp, get_order(size));
+
+	if (ret != NULL) {
+		memset(ret, 0, size);
+		*dma_handle = virt_to_phys(ret);
+	}
+
+	return ret;
+}
+
+EXPORT_SYMBOL(dma_alloc_noncoherent);
+
+void *dma_alloc_coherent(struct device *dev, size_t size,
+	dma_addr_t * dma_handle, int gfp)
+	__attribute__((alias("dma_alloc_noncoherent")));
+
+EXPORT_SYMBOL(dma_alloc_coherent);
+
+void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr,
+	dma_addr_t dma_handle)
+{
+	unsigned long addr = (unsigned long) vaddr;
+
+	free_pages(addr, get_order(size));
+}
+
+EXPORT_SYMBOL(dma_free_noncoherent);
+
+void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
+	dma_addr_t dma_handle) __attribute__((alias("dma_free_noncoherent")));
+
+EXPORT_SYMBOL(dma_free_coherent);
+
+dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
+	enum dma_data_direction direction)
+{
+	BUG_ON(direction == DMA_NONE);
+
+	return __pa(ptr);
+}
+
+EXPORT_SYMBOL(dma_map_single);
+
+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);
+}
+
+EXPORT_SYMBOL(dma_unmap_single);
+
+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++) {
+		sg->dma_address = (dma_addr_t)page_to_phys(sg->page) + sg->offset;
+	}
+
+	return nents;
+}
+
+EXPORT_SYMBOL(dma_map_sg);
+
+dma_addr_t dma_map_page(struct device *dev, struct page *page,
+	unsigned long offset, size_t size, enum dma_data_direction direction)
+{
+	BUG_ON(direction == DMA_NONE);
+
+	return page_to_phys(page) + offset;
+}
+
+EXPORT_SYMBOL(dma_map_page);
+
+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);
+}
+
+EXPORT_SYMBOL(dma_unmap_page);
+
+void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
+	     enum dma_data_direction direction)
+{
+	BUG_ON(direction == DMA_NONE);
+}
+
+EXPORT_SYMBOL(dma_unmap_sg);
+
+void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
+	size_t size, enum dma_data_direction direction)
+{
+	BUG_ON(direction == DMA_NONE);
+}
+
+EXPORT_SYMBOL(dma_sync_single_for_cpu);
+
+void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
+	size_t size, enum dma_data_direction direction)
+{
+	BUG_ON(direction == DMA_NONE);
+}
+
+EXPORT_SYMBOL(dma_sync_single_for_device);
+
+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)
+{
+	BUG_ON(direction == DMA_NONE);
+}
+
+EXPORT_SYMBOL(dma_sync_single_range_for_cpu);
+
+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)
+{
+	BUG_ON(direction == DMA_NONE);
+}
+
+EXPORT_SYMBOL(dma_sync_single_range_for_device);
+
+void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
+		 enum dma_data_direction direction)
+{
+	BUG_ON(direction == DMA_NONE);
+}
+
+EXPORT_SYMBOL(dma_sync_sg_for_cpu);
+
+void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
+		 enum dma_data_direction direction)
+{
+	BUG_ON(direction == DMA_NONE);
+}
+
+EXPORT_SYMBOL(dma_sync_sg_for_device);
+
+int dma_mapping_error(dma_addr_t dma_addr)
+{
+	return 0;
+}
+
+EXPORT_SYMBOL(dma_mapping_error);
+
+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;
+}
+
+EXPORT_SYMBOL(dma_supported);
+
+int dma_is_consistent(dma_addr_t dma_addr)
+{
+	return 1;
+}
+
+EXPORT_SYMBOL(dma_is_consistent);
+
+void dma_cache_sync(void *vaddr, size_t size,
+	       enum dma_data_direction direction)
+{
+	BUG_ON(direction == DMA_NONE);
+}
+
+EXPORT_SYMBOL(dma_cache_sync);
+
+/* The DAC routines are a PCIism.. */
+
+#ifdef CONFIG_PCI
+
+#include <linux/pci.h>
+
+dma64_addr_t pci_dac_page_to_dma(struct pci_dev *pdev,
+	struct page *page, unsigned long offset, int direction)
+{
+	return (dma64_addr_t)page_to_phys(page) + offset;
+}
+
+EXPORT_SYMBOL(pci_dac_page_to_dma);
+
+struct page *pci_dac_dma_to_page(struct pci_dev *pdev,
+	dma64_addr_t dma_addr)
+{
+	return mem_map + (dma_addr >> PAGE_SHIFT);
+}
+
+EXPORT_SYMBOL(pci_dac_dma_to_page);
+
+unsigned long pci_dac_dma_to_offset(struct pci_dev *pdev,
+	dma64_addr_t dma_addr)
+{
+	return dma_addr & ~PAGE_MASK;
+}
+
+EXPORT_SYMBOL(pci_dac_dma_to_offset);
+
+void pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev,
+	dma64_addr_t dma_addr, size_t len, int direction)
+{
+	BUG_ON(direction == PCI_DMA_NONE);
+}
+
+EXPORT_SYMBOL(pci_dac_dma_sync_single_for_cpu);
+
+void pci_dac_dma_sync_single_for_device(struct pci_dev *pdev,
+	dma64_addr_t dma_addr, size_t len, int direction)
+{
+	BUG_ON(direction == PCI_DMA_NONE);
+}
+
+EXPORT_SYMBOL(pci_dac_dma_sync_single_for_device);
+
+#endif /* CONFIG_PCI */