root/arch/ia64/kernel/dma-mapping.c

DEFINITIONS

1. arch_dma_alloc
2. arch_dma_free
3. arch_dma_coherent_to_pfn

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/dma-direct.h>
   3 #include <linux/export.h>
   4 
   5 /* Set this to 1 if there is a HW IOMMU in the system */
   6 int iommu_detected __read_mostly;
   7 
   8 const struct dma_map_ops *dma_ops;
   9 EXPORT_SYMBOL(dma_ops);
  10 
  11 void *arch_dma_alloc(struct device *dev, size_t size,
  12                 dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
  13 {
  14         return dma_direct_alloc_pages(dev, size, dma_handle, gfp, attrs);
  15 }
  16 
  17 void arch_dma_free(struct device *dev, size_t size, void *cpu_addr,
  18                 dma_addr_t dma_addr, unsigned long attrs)
  19 {
  20         dma_direct_free_pages(dev, size, cpu_addr, dma_addr, attrs);
  21 }
  22 
  23 long arch_dma_coherent_to_pfn(struct device *dev, void *cpu_addr,
  24                 dma_addr_t dma_addr)
  25 {
  26         return page_to_pfn(virt_to_page(cpu_addr));
  27 }