gtt.h 1.9 KB

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  1. /* SPDX-License-Identifier: GPL-2.0-only */
  2. /**************************************************************************
  3. * Copyright (c) 2007-2008, Intel Corporation.
  4. * All Rights Reserved.
  5. *
  6. **************************************************************************/
  7. #ifndef _PSB_GTT_H_
  8. #define _PSB_GTT_H_
  9. #include <drm/drm_gem.h>
  10. /* This wants cleaning up with respect to the psb_dev and un-needed stuff */
  11. struct psb_gtt {
  12. uint32_t gatt_start;
  13. uint32_t mmu_gatt_start;
  14. uint32_t gtt_start;
  15. uint32_t gtt_phys_start;
  16. unsigned gtt_pages;
  17. unsigned gatt_pages;
  18. unsigned long stolen_size;
  19. unsigned long vram_stolen_size;
  20. struct rw_semaphore sem;
  21. };
  22. /* Exported functions */
  23. extern int psb_gtt_init(struct drm_device *dev, int resume);
  24. extern void psb_gtt_takedown(struct drm_device *dev);
  25. /* Each gtt_range describes an allocation in the GTT area */
  26. struct gtt_range {
  27. struct resource resource; /* Resource for our allocation */
  28. u32 offset; /* GTT offset of our object */
  29. struct drm_gem_object gem; /* GEM high level stuff */
  30. int in_gart; /* Currently in the GART (ref ct) */
  31. bool stolen; /* Backed from stolen RAM */
  32. bool mmapping; /* Is mmappable */
  33. struct page **pages; /* Backing pages if present */
  34. int npage; /* Number of backing pages */
  35. int roll; /* Roll applied to the GTT entries */
  36. };
  37. #define to_gtt_range(x) container_of(x, struct gtt_range, gem)
  38. extern struct gtt_range *psb_gtt_alloc_range(struct drm_device *dev, int len,
  39. const char *name, int backed,
  40. u32 align);
  41. extern void psb_gtt_kref_put(struct gtt_range *gt);
  42. extern void psb_gtt_free_range(struct drm_device *dev, struct gtt_range *gt);
  43. extern int psb_gtt_pin(struct gtt_range *gt);
  44. extern void psb_gtt_unpin(struct gtt_range *gt);
  45. extern void psb_gtt_roll(struct drm_device *dev,
  46. struct gtt_range *gt, int roll);
  47. extern int psb_gtt_restore(struct drm_device *dev);
  48. #endif