mmu.h 2.5 KB

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  1. /* SPDX-License-Identifier: GPL-2.0-only */
  2. /**************************************************************************
  3. * Copyright (c) 2007-2011, Intel Corporation.
  4. * All Rights Reserved.
  5. *
  6. **************************************************************************/
  7. #ifndef __MMU_H
  8. #define __MMU_H
  9. struct psb_mmu_driver {
  10. /* protects driver- and pd structures. Always take in read mode
  11. * before taking the page table spinlock.
  12. */
  13. struct rw_semaphore sem;
  14. /* protects page tables, directory tables and pt tables.
  15. * and pt structures.
  16. */
  17. spinlock_t lock;
  18. atomic_t needs_tlbflush;
  19. atomic_t *msvdx_mmu_invaldc;
  20. struct psb_mmu_pd *default_pd;
  21. uint32_t bif_ctrl;
  22. int has_clflush;
  23. int clflush_add;
  24. unsigned long clflush_mask;
  25. struct drm_device *dev;
  26. };
  27. struct psb_mmu_pd;
  28. struct psb_mmu_pt {
  29. struct psb_mmu_pd *pd;
  30. uint32_t index;
  31. uint32_t count;
  32. struct page *p;
  33. uint32_t *v;
  34. };
  35. struct psb_mmu_pd {
  36. struct psb_mmu_driver *driver;
  37. int hw_context;
  38. struct psb_mmu_pt **tables;
  39. struct page *p;
  40. struct page *dummy_pt;
  41. struct page *dummy_page;
  42. uint32_t pd_mask;
  43. uint32_t invalid_pde;
  44. uint32_t invalid_pte;
  45. };
  46. extern struct psb_mmu_driver *psb_mmu_driver_init(struct drm_device *dev,
  47. int trap_pagefaults,
  48. int invalid_type,
  49. atomic_t *msvdx_mmu_invaldc);
  50. extern void psb_mmu_driver_takedown(struct psb_mmu_driver *driver);
  51. extern struct psb_mmu_pd *psb_mmu_get_default_pd(struct psb_mmu_driver
  52. *driver);
  53. extern struct psb_mmu_pd *psb_mmu_alloc_pd(struct psb_mmu_driver *driver,
  54. int trap_pagefaults,
  55. int invalid_type);
  56. extern void psb_mmu_free_pagedir(struct psb_mmu_pd *pd);
  57. extern void psb_mmu_flush(struct psb_mmu_driver *driver);
  58. extern void psb_mmu_remove_pfn_sequence(struct psb_mmu_pd *pd,
  59. unsigned long address,
  60. uint32_t num_pages);
  61. extern int psb_mmu_insert_pfn_sequence(struct psb_mmu_pd *pd,
  62. uint32_t start_pfn,
  63. unsigned long address,
  64. uint32_t num_pages, int type);
  65. extern int psb_mmu_virtual_to_pfn(struct psb_mmu_pd *pd, uint32_t virtual,
  66. unsigned long *pfn);
  67. extern void psb_mmu_set_pd_context(struct psb_mmu_pd *pd, int hw_context);
  68. extern int psb_mmu_insert_pages(struct psb_mmu_pd *pd, struct page **pages,
  69. unsigned long address, uint32_t num_pages,
  70. uint32_t desired_tile_stride,
  71. uint32_t hw_tile_stride, int type);
  72. extern void psb_mmu_remove_pages(struct psb_mmu_pd *pd,
  73. unsigned long address, uint32_t num_pages,
  74. uint32_t desired_tile_stride,
  75. uint32_t hw_tile_stride);
  76. #endif