1 #ifndef __DRM_GEM_CMA_HELPER_H__ 2 #define __DRM_GEM_CMA_HELPER_H__ 3 4 #include <drm/drmP.h> 5 #include <drm/drm_gem.h> 6 7 /** 8 * struct drm_gem_cma_object - GEM object backed by CMA memory allocations 9 * @base: base GEM object 10 * @paddr: physical address of the backing memory 11 * @sgt: scatter/gather table for imported PRIME buffers 12 * @vaddr: kernel virtual address of the backing memory 13 */ 14 struct drm_gem_cma_object { 15 struct drm_gem_object base; 16 dma_addr_t paddr; 17 struct sg_table *sgt; 18 19 /* For objects with DMA memory allocated by GEM CMA */ 20 void *vaddr; 21 }; 22 23 static inline struct drm_gem_cma_object * 24 to_drm_gem_cma_obj(struct drm_gem_object *gem_obj) 25 { 26 return container_of(gem_obj, struct drm_gem_cma_object, base); 27 } 28 29 /* free GEM object */ 30 void drm_gem_cma_free_object(struct drm_gem_object *gem_obj); 31 32 /* create memory region for DRM framebuffer */ 33 int drm_gem_cma_dumb_create_internal(struct drm_file *file_priv, 34 struct drm_device *drm, 35 struct drm_mode_create_dumb *args); 36 37 /* create memory region for DRM framebuffer */ 38 int drm_gem_cma_dumb_create(struct drm_file *file_priv, 39 struct drm_device *drm, 40 struct drm_mode_create_dumb *args); 41 42 /* map memory region for DRM framebuffer to user space */ 43 int drm_gem_cma_dumb_map_offset(struct drm_file *file_priv, 44 struct drm_device *drm, u32 handle, 45 u64 *offset); 46 47 /* set vm_flags and we can change the VM attribute to other one at here */ 48 int drm_gem_cma_mmap(struct file *filp, struct vm_area_struct *vma); 49 50 /* allocate physical memory */ 51 struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm, 52 size_t size); 53 54 extern const struct vm_operations_struct drm_gem_cma_vm_ops; 55 56 #ifdef CONFIG_DEBUG_FS 57 void drm_gem_cma_describe(struct drm_gem_cma_object *obj, struct seq_file *m); 58 #endif 59 60 struct sg_table *drm_gem_cma_prime_get_sg_table(struct drm_gem_object *obj); 61 struct drm_gem_object * 62 drm_gem_cma_prime_import_sg_table(struct drm_device *dev, 63 struct dma_buf_attachment *attach, 64 struct sg_table *sgt); 65 int drm_gem_cma_prime_mmap(struct drm_gem_object *obj, 66 struct vm_area_struct *vma); 67 void *drm_gem_cma_prime_vmap(struct drm_gem_object *obj); 68 void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr); 69 70 #endif /* __DRM_GEM_CMA_HELPER_H__ */ 71