root/arch/x86/include/asm/xen/page-coherent.h

INCLUDED FROM

DEFINITIONS

1. xen_alloc_coherent_pages
2. xen_free_coherent_pages

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_X86_XEN_PAGE_COHERENT_H
   3 #define _ASM_X86_XEN_PAGE_COHERENT_H
   4 
   5 #include <asm/page.h>
   6 #include <linux/dma-mapping.h>
   7 
   8 static inline void *xen_alloc_coherent_pages(struct device *hwdev, size_t size,
   9                 dma_addr_t *dma_handle, gfp_t flags,
  10                 unsigned long attrs)
  11 {
  12         void *vstart = (void*)__get_free_pages(flags, get_order(size));
  13         *dma_handle = virt_to_phys(vstart);
  14         return vstart;
  15 }
  16 
  17 static inline void xen_free_coherent_pages(struct device *hwdev, size_t size,
  18                 void *cpu_addr, dma_addr_t dma_handle,
  19                 unsigned long attrs)
  20 {
  21         free_pages((unsigned long) cpu_addr, get_order(size));
  22 }
  23 
  24 #endif /* _ASM_X86_XEN_PAGE_COHERENT_H */