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 */
14struct 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
23static inline struct drm_gem_cma_object *
24to_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 */
30void drm_gem_cma_free_object(struct drm_gem_object *gem_obj);
31
32/* create memory region for DRM framebuffer */
33int 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 */
38int 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 */
43int 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 */
48int drm_gem_cma_mmap(struct file *filp, struct vm_area_struct *vma);
49
50/* allocate physical memory */
51struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
52					      size_t size);
53
54extern const struct vm_operations_struct drm_gem_cma_vm_ops;
55
56#ifdef CONFIG_DEBUG_FS
57void drm_gem_cma_describe(struct drm_gem_cma_object *obj, struct seq_file *m);
58#endif
59
60struct sg_table *drm_gem_cma_prime_get_sg_table(struct drm_gem_object *obj);
61struct drm_gem_object *
62drm_gem_cma_prime_import_sg_table(struct drm_device *dev,
63				  struct dma_buf_attachment *attach,
64				  struct sg_table *sgt);
65int drm_gem_cma_prime_mmap(struct drm_gem_object *obj,
66			   struct vm_area_struct *vma);
67void *drm_gem_cma_prime_vmap(struct drm_gem_object *obj);
68void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
69
70#endif /* __DRM_GEM_CMA_HELPER_H__ */
71