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 /** 30 * DEFINE_DRM_GEM_CMA_FOPS() - macro to generate file operations for CMA drivers 31 * @name: name for the generated structure 32 * 33 * This macro autogenerates a suitable &struct file_operations for CMA based 34 * drivers, which can be assigned to &drm_driver.fops. Note that this structure 35 * cannot be shared between drivers, because it contains a reference to the 36 * current module using THIS_MODULE. 37 * 38 * Note that the declaration is already marked as static - if you need a 39 * non-static version of this you're probably doing it wrong and will break the 40 * THIS_MODULE reference by accident. 41 */ 42 #define DEFINE_DRM_GEM_CMA_FOPS(name) \ 43 static const struct file_operations name = {\ 44 .owner = THIS_MODULE,\ 45 .open = drm_open,\ 46 .release = drm_release,\ 47 .unlocked_ioctl = drm_ioctl,\ 48 .compat_ioctl = drm_compat_ioctl,\ 49 .poll = drm_poll,\ 50 .read = drm_read,\ 51 .llseek = noop_llseek,\ 52 .mmap = drm_gem_cma_mmap,\ 53 } 54 55 /* free GEM object */ 56 void drm_gem_cma_free_object(struct drm_gem_object *gem_obj); 57 58 /* create memory region for DRM framebuffer */ 59 int drm_gem_cma_dumb_create_internal(struct drm_file *file_priv, 60 struct drm_device *drm, 61 struct drm_mode_create_dumb *args); 62 63 /* create memory region for DRM framebuffer */ 64 int drm_gem_cma_dumb_create(struct drm_file *file_priv, 65 struct drm_device *drm, 66 struct drm_mode_create_dumb *args); 67 68 /* map memory region for DRM framebuffer to user space */ 69 int drm_gem_cma_dumb_map_offset(struct drm_file *file_priv, 70 struct drm_device *drm, u32 handle, 71 u64 *offset); 72 73 /* set vm_flags and we can change the VM attribute to other one at here */ 74 int drm_gem_cma_mmap(struct file *filp, struct vm_area_struct *vma); 75 76 /* allocate physical memory */ 77 struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm, 78 size_t size); 79 80 extern const struct vm_operations_struct drm_gem_cma_vm_ops; 81 82 #ifdef CONFIG_DEBUG_FS 83 void drm_gem_cma_describe(struct drm_gem_cma_object *obj, struct seq_file *m); 84 #endif 85 86 struct sg_table *drm_gem_cma_prime_get_sg_table(struct drm_gem_object *obj); 87 struct drm_gem_object * 88 drm_gem_cma_prime_import_sg_table(struct drm_device *dev, 89 struct dma_buf_attachment *attach, 90 struct sg_table *sgt); 91 int drm_gem_cma_prime_mmap(struct drm_gem_object *obj, 92 struct vm_area_struct *vma); 93 void *drm_gem_cma_prime_vmap(struct drm_gem_object *obj); 94 void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr); 95 96 #endif /* __DRM_GEM_CMA_HELPER_H__ */ 97