1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 3 #ifndef DRM_GEM_VRAM_HELPER_H 4 #define DRM_GEM_VRAM_HELPER_H 5 6 #include <drm/drm_gem.h> 7 #include <drm/ttm/ttm_bo_api.h> 8 #include <drm/ttm/ttm_placement.h> 9 #include <linux/kernel.h> /* for container_of() */ 10 11 struct drm_mode_create_dumb; 12 struct drm_vram_mm_funcs; 13 struct filp; 14 struct vm_area_struct; 15 16 #define DRM_GEM_VRAM_PL_FLAG_VRAM TTM_PL_FLAG_VRAM 17 #define DRM_GEM_VRAM_PL_FLAG_SYSTEM TTM_PL_FLAG_SYSTEM 18 19 /* 20 * Buffer-object helpers 21 */ 22 23 /** 24 * struct drm_gem_vram_object - GEM object backed by VRAM 25 * @gem: GEM object 26 * @bo: TTM buffer object 27 * @kmap: Mapping information for @bo 28 * @placement: TTM placement information. Supported placements are \ 29 %TTM_PL_VRAM and %TTM_PL_SYSTEM 30 * @placements: TTM placement information. 31 * @pin_count: Pin counter 32 * 33 * The type struct drm_gem_vram_object represents a GEM object that is 34 * backed by VRAM. It can be used for simple framebuffer devices with 35 * dedicated memory. The buffer object can be evicted to system memory if 36 * video memory becomes scarce. 37 */ 38 struct drm_gem_vram_object { 39 struct drm_gem_object gem; 40 struct ttm_buffer_object bo; 41 struct ttm_bo_kmap_obj kmap; 42 43 /* Supported placements are %TTM_PL_VRAM and %TTM_PL_SYSTEM */ 44 struct ttm_placement placement; 45 struct ttm_place placements[2]; 46 47 int pin_count; 48 }; 49 50 /** 51 * Returns the container of type &struct drm_gem_vram_object 52 * for field bo. 53 * @bo: the VRAM buffer object 54 * Returns: The containing GEM VRAM object 55 */ 56 static inline struct drm_gem_vram_object *drm_gem_vram_of_bo( 57 struct ttm_buffer_object *bo) 58 { 59 return container_of(bo, struct drm_gem_vram_object, bo); 60 } 61 62 /** 63 * Returns the container of type &struct drm_gem_vram_object 64 * for field gem. 65 * @gem: the GEM object 66 * Returns: The containing GEM VRAM object 67 */ 68 static inline struct drm_gem_vram_object *drm_gem_vram_of_gem( 69 struct drm_gem_object *gem) 70 { 71 return container_of(gem, struct drm_gem_vram_object, gem); 72 } 73 74 struct drm_gem_vram_object *drm_gem_vram_create(struct drm_device *dev, 75 struct ttm_bo_device *bdev, 76 size_t size, 77 unsigned long pg_align, 78 bool interruptible); 79 void drm_gem_vram_put(struct drm_gem_vram_object *gbo); 80 int drm_gem_vram_lock(struct drm_gem_vram_object *gbo, bool no_wait); 81 void drm_gem_vram_unlock(struct drm_gem_vram_object *gbo); 82 u64 drm_gem_vram_mmap_offset(struct drm_gem_vram_object *gbo); 83 s64 drm_gem_vram_offset(struct drm_gem_vram_object *gbo); 84 int drm_gem_vram_pin(struct drm_gem_vram_object *gbo, unsigned long pl_flag); 85 int drm_gem_vram_pin_locked(struct drm_gem_vram_object *gbo, 86 unsigned long pl_flag); 87 int drm_gem_vram_unpin(struct drm_gem_vram_object *gbo); 88 int drm_gem_vram_unpin_locked(struct drm_gem_vram_object *gbo); 89 void *drm_gem_vram_kmap_at(struct drm_gem_vram_object *gbo, bool map, 90 bool *is_iomem, struct ttm_bo_kmap_obj *kmap); 91 void *drm_gem_vram_kmap(struct drm_gem_vram_object *gbo, bool map, 92 bool *is_iomem); 93 void drm_gem_vram_kunmap_at(struct drm_gem_vram_object *gbo, 94 struct ttm_bo_kmap_obj *kmap); 95 void drm_gem_vram_kunmap(struct drm_gem_vram_object *gbo); 96 97 int drm_gem_vram_fill_create_dumb(struct drm_file *file, 98 struct drm_device *dev, 99 struct ttm_bo_device *bdev, 100 unsigned long pg_align, 101 bool interruptible, 102 struct drm_mode_create_dumb *args); 103 104 /* 105 * Helpers for struct ttm_bo_driver 106 */ 107 108 void drm_gem_vram_bo_driver_evict_flags(struct ttm_buffer_object *bo, 109 struct ttm_placement *pl); 110 111 int drm_gem_vram_bo_driver_verify_access(struct ttm_buffer_object *bo, 112 struct file *filp); 113 114 extern const struct drm_vram_mm_funcs drm_gem_vram_mm_funcs; 115 116 /* 117 * Helpers for struct drm_driver 118 */ 119 120 void drm_gem_vram_driver_gem_free_object_unlocked(struct drm_gem_object *gem); 121 int drm_gem_vram_driver_dumb_create(struct drm_file *file, 122 struct drm_device *dev, 123 struct drm_mode_create_dumb *args); 124 int drm_gem_vram_driver_dumb_mmap_offset(struct drm_file *file, 125 struct drm_device *dev, 126 uint32_t handle, uint64_t *offset); 127 128 /** 129 * define DRM_GEM_VRAM_DRIVER - default callback functions for \ 130 &struct drm_driver 131 * 132 * Drivers that use VRAM MM and GEM VRAM can use this macro to initialize 133 * &struct drm_driver with default functions. 134 */ 135 #define DRM_GEM_VRAM_DRIVER \ 136 .gem_free_object_unlocked = \ 137 drm_gem_vram_driver_gem_free_object_unlocked, \ 138 .dumb_create = drm_gem_vram_driver_dumb_create, \ 139 .dumb_map_offset = drm_gem_vram_driver_dumb_mmap_offset 140 141 /* 142 * PRIME helpers for struct drm_driver 143 */ 144 145 int drm_gem_vram_driver_gem_prime_pin(struct drm_gem_object *obj); 146 void drm_gem_vram_driver_gem_prime_unpin(struct drm_gem_object *obj); 147 void *drm_gem_vram_driver_gem_prime_vmap(struct drm_gem_object *obj); 148 void drm_gem_vram_driver_gem_prime_vunmap(struct drm_gem_object *obj, 149 void *vaddr); 150 int drm_gem_vram_driver_gem_prime_mmap(struct drm_gem_object *obj, 151 struct vm_area_struct *vma); 152 153 #define DRM_GEM_VRAM_DRIVER_PRIME \ 154 .gem_prime_export = drm_gem_prime_export, \ 155 .gem_prime_import = drm_gem_prime_import, \ 156 .gem_prime_pin = drm_gem_vram_driver_gem_prime_pin, \ 157 .gem_prime_unpin = drm_gem_vram_driver_gem_prime_unpin, \ 158 .gem_prime_vmap = drm_gem_vram_driver_gem_prime_vmap, \ 159 .gem_prime_vunmap = drm_gem_vram_driver_gem_prime_vunmap, \ 160 .gem_prime_mmap = drm_gem_vram_driver_gem_prime_mmap 161 162 #endif 163