arch/x86/kernel/pci-base_32.c

   1 #include <linux/mm.h>
   2 #include <linux/kernel.h>
   3 #include <linux/module.h>
   4 #include <linux/dma-mapping.h>
   5 #include <asm/dma-mapping.h>
   6
   7 static dma_addr_t pci32_map_single(struct device *dev, void *ptr,
   8                                    size_t size, int direction)
   9 {
  10         WARN_ON(size == 0);
  11         flush_write_buffers();
  12         return virt_to_phys(ptr);
  13 }
  14
  15 static const struct dma_mapping_ops pci32_dma_ops = {
  16         .map_single = pci32_map_single,
  17 };
  18
  19 const struct dma_mapping_ops *dma_ops = &pci32_dma_ops;
  20 EXPORT_SYMBOL(dma_ops);