arch/x86/include/asm/swiotlb.h

   1 #ifndef _ASM_X86_SWIOTLB_H
   2 #define _ASM_X86_SWIOTLB_H
   3
   4 #include <linux/swiotlb.h>
   5
   6 #ifdef CONFIG_SWIOTLB
   7 extern int swiotlb;
   8 extern int __init pci_swiotlb_detect_override(void);
   9 extern int __init pci_swiotlb_detect_4gb(void);
  10 extern void __init pci_swiotlb_init(void);
  11 extern void __init pci_swiotlb_late_init(void);
  12 #else
  13 #define swiotlb 0
  14 static inline int pci_swiotlb_detect_override(void)
  15 {
  16         return 0;
  17 }
  18 static inline int pci_swiotlb_detect_4gb(void)
  19 {
  20         return 0;
  21 }
  22 static inline void pci_swiotlb_init(void)
  23 {
  24 }
  25 static inline void pci_swiotlb_late_init(void)
  26 {
  27 }
  28 #endif
  29
  30 static inline void dma_mark_clean(void *addr, size_t size) {}
  31
  32 extern void *x86_swiotlb_alloc_coherent(struct device *hwdev, size_t size,
  33                                         dma_addr_t *dma_handle, gfp_t flags,
  34                                         struct dma_attrs *attrs);
  35 extern void x86_swiotlb_free_coherent(struct device *dev, size_t size,
  36                                         void *vaddr, dma_addr_t dma_addr,
  37                                         struct dma_attrs *attrs);
  38
  39 #endif /* _ASM_X86_SWIOTLB_H */