etnaviv_mmu.h 3.7 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126
  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. /*
  3. * Copyright (C) 2015-2018 Etnaviv Project
  4. */
  5. #ifndef __ETNAVIV_MMU_H__
  6. #define __ETNAVIV_MMU_H__
  7. #define ETNAVIV_PROT_READ (1 << 0)
  8. #define ETNAVIV_PROT_WRITE (1 << 1)
  9. enum etnaviv_iommu_version {
  10. ETNAVIV_IOMMU_V1 = 0,
  11. ETNAVIV_IOMMU_V2,
  12. };
  13. struct etnaviv_gpu;
  14. struct etnaviv_vram_mapping;
  15. struct etnaviv_iommu_global;
  16. struct etnaviv_iommu_context;
  17. struct etnaviv_iommu_ops {
  18. struct etnaviv_iommu_context *(*init)(struct etnaviv_iommu_global *);
  19. void (*free)(struct etnaviv_iommu_context *);
  20. int (*map)(struct etnaviv_iommu_context *context, unsigned long iova,
  21. phys_addr_t paddr, size_t size, int prot);
  22. size_t (*unmap)(struct etnaviv_iommu_context *context, unsigned long iova,
  23. size_t size);
  24. size_t (*dump_size)(struct etnaviv_iommu_context *);
  25. void (*dump)(struct etnaviv_iommu_context *, void *);
  26. void (*restore)(struct etnaviv_gpu *, struct etnaviv_iommu_context *);
  27. };
  28. extern const struct etnaviv_iommu_ops etnaviv_iommuv1_ops;
  29. extern const struct etnaviv_iommu_ops etnaviv_iommuv2_ops;
  30. #define ETNAVIV_PTA_SIZE SZ_4K
  31. #define ETNAVIV_PTA_ENTRIES (ETNAVIV_PTA_SIZE / sizeof(u64))
  32. struct etnaviv_iommu_global {
  33. struct device *dev;
  34. enum etnaviv_iommu_version version;
  35. const struct etnaviv_iommu_ops *ops;
  36. unsigned int use;
  37. struct mutex lock;
  38. void *bad_page_cpu;
  39. dma_addr_t bad_page_dma;
  40. u32 memory_base;
  41. /*
  42. * This union holds members needed by either MMUv1 or MMUv2, which
  43. * can not exist at the same time.
  44. */
  45. union {
  46. struct {
  47. struct etnaviv_iommu_context *shared_context;
  48. } v1;
  49. struct {
  50. /* P(age) T(able) A(rray) */
  51. u64 *pta_cpu;
  52. dma_addr_t pta_dma;
  53. struct spinlock pta_lock;
  54. DECLARE_BITMAP(pta_alloc, ETNAVIV_PTA_ENTRIES);
  55. } v2;
  56. };
  57. };
  58. struct etnaviv_iommu_context {
  59. struct kref refcount;
  60. struct etnaviv_iommu_global *global;
  61. /* memory manager for GPU address area */
  62. struct mutex lock;
  63. struct list_head mappings;
  64. struct drm_mm mm;
  65. unsigned int flush_seq;
  66. /* Not part of the context, but needs to have the same lifetime */
  67. struct etnaviv_vram_mapping cmdbuf_mapping;
  68. };
  69. int etnaviv_iommu_global_init(struct etnaviv_gpu *gpu);
  70. void etnaviv_iommu_global_fini(struct etnaviv_gpu *gpu);
  71. struct etnaviv_gem_object;
  72. int etnaviv_iommu_map_gem(struct etnaviv_iommu_context *context,
  73. struct etnaviv_gem_object *etnaviv_obj, u32 memory_base,
  74. struct etnaviv_vram_mapping *mapping, u64 va);
  75. void etnaviv_iommu_unmap_gem(struct etnaviv_iommu_context *context,
  76. struct etnaviv_vram_mapping *mapping);
  77. int etnaviv_iommu_get_suballoc_va(struct etnaviv_iommu_context *ctx,
  78. struct etnaviv_vram_mapping *mapping,
  79. u32 memory_base, dma_addr_t paddr,
  80. size_t size);
  81. void etnaviv_iommu_put_suballoc_va(struct etnaviv_iommu_context *ctx,
  82. struct etnaviv_vram_mapping *mapping);
  83. size_t etnaviv_iommu_dump_size(struct etnaviv_iommu_context *ctx);
  84. void etnaviv_iommu_dump(struct etnaviv_iommu_context *ctx, void *buf);
  85. struct etnaviv_iommu_context *
  86. etnaviv_iommu_context_init(struct etnaviv_iommu_global *global,
  87. struct etnaviv_cmdbuf_suballoc *suballoc);
  88. static inline struct etnaviv_iommu_context *
  89. etnaviv_iommu_context_get(struct etnaviv_iommu_context *ctx)
  90. {
  91. kref_get(&ctx->refcount);
  92. return ctx;
  93. }
  94. void etnaviv_iommu_context_put(struct etnaviv_iommu_context *ctx);
  95. void etnaviv_iommu_restore(struct etnaviv_gpu *gpu,
  96. struct etnaviv_iommu_context *ctx);
  97. struct etnaviv_iommu_context *
  98. etnaviv_iommuv1_context_alloc(struct etnaviv_iommu_global *global);
  99. struct etnaviv_iommu_context *
  100. etnaviv_iommuv2_context_alloc(struct etnaviv_iommu_global *global);
  101. u32 etnaviv_iommuv2_get_mtlb_addr(struct etnaviv_iommu_context *context);
  102. unsigned short etnaviv_iommuv2_get_pta_id(struct etnaviv_iommu_context *context);
  103. #endif /* __ETNAVIV_MMU_H__ */