pci-dma-compat.h 3.7 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. /* include this file if the platform implements the dma_ DMA Mapping API
  3. * and wants to provide the pci_ DMA Mapping API in terms of it */
  4. #ifndef _ASM_GENERIC_PCI_DMA_COMPAT_H
  5. #define _ASM_GENERIC_PCI_DMA_COMPAT_H
  6. #include <linux/dma-mapping.h>
  7. /* This defines the direction arg to the DMA mapping routines. */
  8. #define PCI_DMA_BIDIRECTIONAL DMA_BIDIRECTIONAL
  9. #define PCI_DMA_TODEVICE DMA_TO_DEVICE
  10. #define PCI_DMA_FROMDEVICE DMA_FROM_DEVICE
  11. #define PCI_DMA_NONE DMA_NONE
  12. static inline void *
  13. pci_alloc_consistent(struct pci_dev *hwdev, size_t size,
  14. dma_addr_t *dma_handle)
  15. {
  16. return dma_alloc_coherent(&hwdev->dev, size, dma_handle, GFP_ATOMIC);
  17. }
  18. static inline void *
  19. pci_zalloc_consistent(struct pci_dev *hwdev, size_t size,
  20. dma_addr_t *dma_handle)
  21. {
  22. return dma_alloc_coherent(&hwdev->dev, size, dma_handle, GFP_ATOMIC);
  23. }
  24. static inline void
  25. pci_free_consistent(struct pci_dev *hwdev, size_t size,
  26. void *vaddr, dma_addr_t dma_handle)
  27. {
  28. dma_free_coherent(&hwdev->dev, size, vaddr, dma_handle);
  29. }
  30. static inline dma_addr_t
  31. pci_map_single(struct pci_dev *hwdev, void *ptr, size_t size, int direction)
  32. {
  33. return dma_map_single(&hwdev->dev, ptr, size, (enum dma_data_direction)direction);
  34. }
  35. static inline void
  36. pci_unmap_single(struct pci_dev *hwdev, dma_addr_t dma_addr,
  37. size_t size, int direction)
  38. {
  39. dma_unmap_single(&hwdev->dev, dma_addr, size, (enum dma_data_direction)direction);
  40. }
  41. static inline dma_addr_t
  42. pci_map_page(struct pci_dev *hwdev, struct page *page,
  43. unsigned long offset, size_t size, int direction)
  44. {
  45. return dma_map_page(&hwdev->dev, page, offset, size, (enum dma_data_direction)direction);
  46. }
  47. static inline void
  48. pci_unmap_page(struct pci_dev *hwdev, dma_addr_t dma_address,
  49. size_t size, int direction)
  50. {
  51. dma_unmap_page(&hwdev->dev, dma_address, size, (enum dma_data_direction)direction);
  52. }
  53. static inline int
  54. pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg,
  55. int nents, int direction)
  56. {
  57. return dma_map_sg(&hwdev->dev, sg, nents, (enum dma_data_direction)direction);
  58. }
  59. static inline void
  60. pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg,
  61. int nents, int direction)
  62. {
  63. dma_unmap_sg(&hwdev->dev, sg, nents, (enum dma_data_direction)direction);
  64. }
  65. static inline void
  66. pci_dma_sync_single_for_cpu(struct pci_dev *hwdev, dma_addr_t dma_handle,
  67. size_t size, int direction)
  68. {
  69. dma_sync_single_for_cpu(&hwdev->dev, dma_handle, size, (enum dma_data_direction)direction);
  70. }
  71. static inline void
  72. pci_dma_sync_single_for_device(struct pci_dev *hwdev, dma_addr_t dma_handle,
  73. size_t size, int direction)
  74. {
  75. dma_sync_single_for_device(&hwdev->dev, dma_handle, size, (enum dma_data_direction)direction);
  76. }
  77. static inline void
  78. pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev, struct scatterlist *sg,
  79. int nelems, int direction)
  80. {
  81. dma_sync_sg_for_cpu(&hwdev->dev, sg, nelems, (enum dma_data_direction)direction);
  82. }
  83. static inline void
  84. pci_dma_sync_sg_for_device(struct pci_dev *hwdev, struct scatterlist *sg,
  85. int nelems, int direction)
  86. {
  87. dma_sync_sg_for_device(&hwdev->dev, sg, nelems, (enum dma_data_direction)direction);
  88. }
  89. static inline int
  90. pci_dma_mapping_error(struct pci_dev *pdev, dma_addr_t dma_addr)
  91. {
  92. return dma_mapping_error(&pdev->dev, dma_addr);
  93. }
  94. #ifdef CONFIG_PCI
  95. static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
  96. {
  97. return dma_set_mask(&dev->dev, mask);
  98. }
  99. static inline int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
  100. {
  101. return dma_set_coherent_mask(&dev->dev, mask);
  102. }
  103. #else
  104. static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
  105. { return -EIO; }
  106. static inline int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
  107. { return -EIO; }
  108. #endif
  109. #endif