[deliverable/linux.git] / include / drm / drm_gem_cma_helper.h

#ifndef __DRM_GEM_CMA_HELPER_H__
#define __DRM_GEM_CMA_HELPER_H__

#include <drm/drmP.h>
#include <drm/drm_gem.h>

/**
 * struct drm_gem_cma_object - GEM object backed by CMA memory allocations
 * @base: base GEM object
 * @paddr: physical address of the backing memory
 * @sgt: scatter/gather table for imported PRIME buffers
 * @vaddr: kernel virtual address of the backing memory
 */
struct drm_gem_cma_object {
	struct drm_gem_object base;
	dma_addr_t paddr;
	struct sg_table *sgt;

	/* For objects with DMA memory allocated by GEM CMA */
	void *vaddr;
};

static inline struct drm_gem_cma_object *
to_drm_gem_cma_obj(struct drm_gem_object *gem_obj)
{
	return container_of(gem_obj, struct drm_gem_cma_object, base);
}

/* free GEM object */
void drm_gem_cma_free_object(struct drm_gem_object *gem_obj);

/* create memory region for DRM framebuffer */
int drm_gem_cma_dumb_create(struct drm_file *file_priv,
			    struct drm_device *drm,
			    struct drm_mode_create_dumb *args);

/* map memory region for DRM framebuffer to user space */
int drm_gem_cma_dumb_map_offset(struct drm_file *file_priv,
				struct drm_device *drm, u32 handle,
				u64 *offset);

/* set vm_flags and we can change the VM attribute to other one at here */
int drm_gem_cma_mmap(struct file *filp, struct vm_area_struct *vma);

/* allocate physical memory */
struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
					      size_t size);

extern const struct vm_operations_struct drm_gem_cma_vm_ops;

#ifdef CONFIG_DEBUG_FS
void drm_gem_cma_describe(struct drm_gem_cma_object *obj, struct seq_file *m);
#endif

struct sg_table *drm_gem_cma_prime_get_sg_table(struct drm_gem_object *obj);
struct drm_gem_object *
drm_gem_cma_prime_import_sg_table(struct drm_device *dev,
				  struct dma_buf_attachment *attach,
				  struct sg_table *sgt);
int drm_gem_cma_prime_mmap(struct drm_gem_object *obj,
			   struct vm_area_struct *vma);
void *drm_gem_cma_prime_vmap(struct drm_gem_object *obj);
void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr);

#endif /* __DRM_GEM_CMA_HELPER_H__ */
Commit	Line	Data
b9d47450 SH	1	#ifndef __DRM_GEM_CMA_HELPER_H__
	2	#define __DRM_GEM_CMA_HELPER_H__
	3
740c22ae	4	#include <drm/drmP.h>
d9fc9413	5	#include <drm/drm_gem.h>
740c22ae	6
d7883f87 TR	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	*/
b9d47450 SH	14	struct drm_gem_cma_object {
	15	struct drm_gem_object base;
	16	dma_addr_t paddr;
71d7282a LP	17	struct sg_table *sgt;
	18
	19	/* For objects with DMA memory allocated by GEM CMA */
b9d47450 SH	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
d7883f87	29	/* free GEM object */
b9d47450 SH	30	void drm_gem_cma_free_object(struct drm_gem_object *gem_obj);
b9d47450 SH	31
d7883f87	32	/* create memory region for DRM framebuffer */
b9d47450	33	int drm_gem_cma_dumb_create(struct drm_file *file_priv,
d7883f87 TR	34	struct drm_device *drm,
d7883f87 TR	35	struct drm_mode_create_dumb *args);
b9d47450	36
d7883f87	37	/* map memory region for DRM framebuffer to user space */
b9d47450	38	int drm_gem_cma_dumb_map_offset(struct drm_file *file_priv,
d7883f87 TR	39	struct drm_device *drm, u32 handle,
d7883f87 TR	40	u64 *offset);
b9d47450	41
d7883f87	42	/* set vm_flags and we can change the VM attribute to other one at here */
b9d47450 SH	43	int drm_gem_cma_mmap(struct file filp, struct vm_area_struct vma);
b9d47450 SH	44
d7883f87	45	/* allocate physical memory */
b9d47450	46	struct drm_gem_cma_object drm_gem_cma_create(struct drm_device drm,
d7883f87	47	size_t size);
b9d47450 SH	48
	49	extern const struct vm_operations_struct drm_gem_cma_vm_ops;
	50
6f646095 RC	51	#ifdef CONFIG_DEBUG_FS
	52	void drm_gem_cma_describe(struct drm_gem_cma_object obj, struct seq_file m);
	53	#endif
	54
78467dc5 JS	55	struct sg_table drm_gem_cma_prime_get_sg_table(struct drm_gem_object obj);
78467dc5 JS	56	struct drm_gem_object *
b5e9c1a2 ML	57	drm_gem_cma_prime_import_sg_table(struct drm_device *dev,
b5e9c1a2 ML	58	struct dma_buf_attachment *attach,
78467dc5 JS	59	struct sg_table *sgt);
	60	int drm_gem_cma_prime_mmap(struct drm_gem_object *obj,
	61	struct vm_area_struct *vma);
	62	void drm_gem_cma_prime_vmap(struct drm_gem_object obj);
	63	void drm_gem_cma_prime_vunmap(struct drm_gem_object obj, void vaddr);
	64
b9d47450	65	#endif /* __DRM_GEM_CMA_HELPER_H__ */