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  1. /* include this file if the platform implements the dma_ DMA Mapping API
  2.  * and wants to provide the pci_ DMA Mapping API in terms of it */
  3.  
  4. #ifndef _ASM_GENERIC_PCI_DMA_COMPAT_H
  5. #define _ASM_GENERIC_PCI_DMA_COMPAT_H
  6.  
  7. #include <linux/dma-mapping.h>
  8.  
  9. /* This defines the direction arg to the DMA mapping routines. */
  10. #define PCI_DMA_BIDIRECTIONAL   0
  11. #define PCI_DMA_TODEVICE        1
  12. #define PCI_DMA_FROMDEVICE      2
  13. #define PCI_DMA_NONE            3
  14.  
  15. static inline void *
  16. pci_alloc_consistent(struct pci_dev *hwdev, size_t size,
  17.                      dma_addr_t *dma_handle)
  18. {
  19.         return dma_alloc_coherent(hwdev == NULL ? NULL : &hwdev->dev, size, dma_handle, GFP_ATOMIC);
  20. }
  21.  
  22. static inline void *
  23. pci_zalloc_consistent(struct pci_dev *hwdev, size_t size,
  24.                       dma_addr_t *dma_handle)
  25. {
  26.         return dma_zalloc_coherent(hwdev == NULL ? NULL : &hwdev->dev,
  27.                                    size, dma_handle, GFP_ATOMIC);
  28. }
  29.  
  30. static inline void
  31. pci_free_consistent(struct pci_dev *hwdev, size_t size,
  32.                     void *vaddr, dma_addr_t dma_handle)
  33. {
  34.         dma_free_coherent(hwdev == NULL ? NULL : &hwdev->dev, size, vaddr, dma_handle);
  35. }
  36.  
  37. static inline dma_addr_t
  38. pci_map_single(struct pci_dev *hwdev, void *ptr, size_t size, int direction)
  39. {
  40.         return dma_map_single(hwdev == NULL ? NULL : &hwdev->dev, ptr, size, (enum dma_data_direction)direction);
  41. }
  42.  
  43. static inline void
  44. pci_unmap_single(struct pci_dev *hwdev, dma_addr_t dma_addr,
  45.                  size_t size, int direction)
  46. {
  47.         dma_unmap_single(hwdev == NULL ? NULL : &hwdev->dev, dma_addr, size, (enum dma_data_direction)direction);
  48. }
  49.  
  50. static inline dma_addr_t
  51. pci_map_page(struct pci_dev *hwdev, struct page *page,
  52.              unsigned long offset, size_t size, int direction)
  53. {
  54.     return (dma_addr_t)( (offset)+page_to_phys(page));
  55. }
  56.  
  57. static inline void
  58. pci_unmap_page(struct pci_dev *hwdev, dma_addr_t dma_address,
  59.                size_t size, int direction)
  60. {
  61.  
  62. }
  63.  
  64. static inline int
  65. pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg,
  66.            int nents, int direction)
  67. {
  68.         return dma_map_sg(hwdev == NULL ? NULL : &hwdev->dev, sg, nents, (enum dma_data_direction)direction);
  69. }
  70.  
  71. static inline void
  72. pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg,
  73.              int nents, int direction)
  74. {
  75.         dma_unmap_sg(hwdev == NULL ? NULL : &hwdev->dev, sg, nents, (enum dma_data_direction)direction);
  76. }
  77.  
  78. static inline void
  79. pci_dma_sync_single_for_cpu(struct pci_dev *hwdev, dma_addr_t dma_handle,
  80.                     size_t size, int direction)
  81. {
  82.         dma_sync_single_for_cpu(hwdev == NULL ? NULL : &hwdev->dev, dma_handle, size, (enum dma_data_direction)direction);
  83. }
  84.  
  85. static inline void
  86. pci_dma_sync_single_for_device(struct pci_dev *hwdev, dma_addr_t dma_handle,
  87.                     size_t size, int direction)
  88. {
  89.         dma_sync_single_for_device(hwdev == NULL ? NULL : &hwdev->dev, dma_handle, size, (enum dma_data_direction)direction);
  90. }
  91.  
  92. static inline void
  93. pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev, struct scatterlist *sg,
  94.                 int nelems, int direction)
  95. {
  96.         dma_sync_sg_for_cpu(hwdev == NULL ? NULL : &hwdev->dev, sg, nelems, (enum dma_data_direction)direction);
  97. }
  98.  
  99. static inline void
  100. pci_dma_sync_sg_for_device(struct pci_dev *hwdev, struct scatterlist *sg,
  101.                 int nelems, int direction)
  102. {
  103.         dma_sync_sg_for_device(hwdev == NULL ? NULL : &hwdev->dev, sg, nelems, (enum dma_data_direction)direction);
  104. }
  105.  
  106. static inline int
  107. pci_dma_mapping_error(struct pci_dev *pdev, dma_addr_t dma_addr)
  108. {
  109.         return dma_mapping_error(&pdev->dev, dma_addr);
  110. }
  111.  
  112. #ifdef CONFIG_PCI
  113. static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
  114. {
  115.     return 0;
  116. }
  117.  
  118. #else
  119. static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
  120. { return -EIO; }
  121. static inline int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
  122. { return -EIO; }
  123. static inline int pci_set_dma_max_seg_size(struct pci_dev *dev,
  124.                                            unsigned int size)
  125. { return -EIO; }
  126. static inline int pci_set_dma_seg_boundary(struct pci_dev *dev,
  127.                                            unsigned long mask)
  128. { return -EIO; }
  129. #endif
  130.  
  131. #endif
  132.