/* Public Domain */

#ifndef _DRM_DRM_GEM_DMA_HELPER_H
#define _DRM_DRM_GEM_DMA_HELPER_H

#include <drm/drm_gem.h>

void drm_gem_dma_free_object(struct drm_gem_object *);
int drm_gem_dma_dumb_create(struct drm_file *, struct drm_device *,
    struct drm_mode_create_dumb *);
int drm_gem_dma_dumb_create_internal(struct drm_file *, struct drm_device *,
    struct drm_mode_create_dumb *);
int drm_gem_dma_dumb_map_offset(struct drm_file *, struct drm_device *,
    uint32_t, uint64_t *);
struct drm_gem_dma_object *drm_gem_dma_create(struct drm_device *,
    size_t);

int drm_gem_dma_fault(struct drm_gem_object *, struct uvm_faultinfo *,
    off_t, vaddr_t, vm_page_t *, int, int, vm_prot_t, int);

struct sg_table *drm_gem_dma_get_sg_table(struct drm_gem_object *);

int drm_gem_dma_vmap(struct drm_gem_object *, struct iosys_map *);

struct drm_gem_dma_object {
        struct drm_gem_object   base;
        bus_dma_tag_t           dmat;
        bus_dmamap_t            dmamap;
        bus_dma_segment_t       dmasegs[1];
        size_t                  dmasize;
        dma_addr_t              dma_addr;
        caddr_t                 vaddr;
        struct sg_table         *sgt;
        bool                    map_noncoherent;
};

#define to_drm_gem_dma_obj(gem_obj) container_of(gem_obj, struct drm_gem_dma_object, base)

#define DEFINE_DRM_GEM_DMA_FOPS(name) struct file_operations name = {};

#define DRM_GEM_DMA_DRIVER_OPS_WITH_DUMB_CREATE(x)      \
        .dumb_create = (x),                             \
        .gem_fault = drm_gem_dma_fault

#endif