C++ drm_gem_handle_create函数代码示例

int radeon_gem_create_ioctl(struct drm_device *dev, void *data,
			    struct drm_file *filp)
{
	struct radeon_device *rdev = dev->dev_private;
	struct drm_radeon_gem_create *args = data;
	struct drm_gem_object *gobj;
	uint32_t handle;
	int r;

	sx_slock(&rdev->exclusive_lock);
	/* create a gem object to contain this object in */
	args->size = roundup(args->size, PAGE_SIZE);
	r = radeon_gem_object_create(rdev, args->size, args->alignment,
					args->initial_domain, false,
					false, &gobj);
	if (r) {
		sx_sunlock(&rdev->exclusive_lock);
		r = radeon_gem_handle_lockup(rdev, r);
		return r;
	}
	handle = 0;
	r = drm_gem_handle_create(filp, gobj, &handle);
	/* drop reference from allocate - handle holds it now */
	drm_gem_object_unreference_unlocked(gobj);
	if (r) {
		sx_sunlock(&rdev->exclusive_lock);
		r = radeon_gem_handle_lockup(rdev, r);
		return r;
	}
	args->handle = handle;
	sx_sunlock(&rdev->exclusive_lock);
	return 0;
}

int hibmc_dumb_create(struct drm_file *file, struct drm_device *dev,
		      struct drm_mode_create_dumb *args)
{
	struct drm_gem_object *gobj;
	u32 handle;
	int ret;

	args->pitch = ALIGN(args->width * DIV_ROUND_UP(args->bpp, 8), 16);
	args->size = args->pitch * args->height;

	ret = hibmc_gem_create(dev, args->size, false,
			       &gobj);
	if (ret) {
		DRM_ERROR("failed to create GEM object: %d\n", ret);
		return ret;
	}

	ret = drm_gem_handle_create(file, gobj, &handle);
	drm_gem_object_unreference_unlocked(gobj);
	if (ret) {
		DRM_ERROR("failed to unreference GEM object: %d\n", ret);
		return ret;
	}

	args->handle = handle;
	return 0;
}

int
nouveau_gem_ioctl_new(struct drm_device *dev, void *data,
		      struct drm_file *file_priv)
{
	struct nouveau_cli *cli = nouveau_cli(file_priv);
	struct drm_nouveau_gem_new *req = data;
	struct nouveau_bo *nvbo = NULL;
	int ret = 0;

	ret = nouveau_gem_new(cli, req->info.size, req->align,
			      req->info.domain, req->info.tile_mode,
			      req->info.tile_flags, &nvbo);
	if (ret)
		return ret;

	ret = drm_gem_handle_create(file_priv, &nvbo->gem, &req->info.handle);
	if (ret == 0) {
		ret = nouveau_gem_info(file_priv, &nvbo->gem, &req->info);
		if (ret)
			drm_gem_handle_delete(file_priv, req->info.handle);
	}

	/* drop reference from allocate - handle holds it now */
	drm_gem_object_unreference_unlocked(&nvbo->gem);
	return ret;
}

int mtk_drm_gem_dumb_create(struct drm_file *file_priv,
			       struct drm_device *dev,
			       struct drm_mode_create_dumb *args)

{
	struct mtk_drm_gem_obj *mtk_gem;
	unsigned int min_pitch = args->width * ((args->bpp + 7) / 8);
	int ret;

	args->pitch = min_pitch;
	args->size = args->pitch * args->height;

	mtk_gem = mtk_drm_gem_create(dev, args->size, false);
	if (IS_ERR(mtk_gem))
		return PTR_ERR(mtk_gem);

	/*
	 * allocate a id of idr table where the obj is registered
	 * and handle has the id what user can see.
	 */
	ret = drm_gem_handle_create(file_priv, &mtk_gem->base, &args->handle);
	if (ret)
		goto err_handle_create;

	/* drop reference from allocate - handle holds it now. */
	drm_gem_object_unreference_unlocked(&mtk_gem->base);

	return 0;

err_handle_create:
	mtk_drm_gem_free_object(&mtk_gem->base);
	return ret;
}

int mediatek_gem_create_ioctl(struct drm_device *dev, void *data,
			      struct drm_file *file_priv)
{
	struct mtk_drm_gem_obj *mtk_gem;
	struct drm_mtk_gem_create *args = data;
	int ret;

	mtk_gem = mtk_drm_gem_create(dev, args->size, false);
	if (IS_ERR(mtk_gem))
		return PTR_ERR(mtk_gem);

	/*
	 * allocate a id of idr table where the obj is registered
	 * and handle has the id what user can see.
	 */
	ret = drm_gem_handle_create(file_priv, &mtk_gem->base, &args->handle);
	if (ret)
		goto err_handle_create;

	/* drop reference from allocate - handle holds it now. */
	drm_gem_object_unreference_unlocked(&mtk_gem->base);

	return 0;

err_handle_create:
	mtk_drm_gem_free_object(&mtk_gem->base);
	return ret;
}

int virtio_gpu_gem_create(struct drm_file *file,
			  struct drm_device *dev,
			  uint64_t size,
			  struct drm_gem_object **obj_p,
			  uint32_t *handle_p)
{
	struct virtio_gpu_object *obj;
	int ret;
	u32 handle;

	obj = virtio_gpu_alloc_object(dev, size, false, false);
	if (IS_ERR(obj))
		return PTR_ERR(obj);

	ret = drm_gem_handle_create(file, &obj->gem_base, &handle);
	if (ret) {
		drm_gem_object_release(&obj->gem_base);
		return ret;
	}

	*obj_p = &obj->gem_base;

	/* drop reference from allocate - handle holds it now */
	drm_gem_object_unreference_unlocked(&obj->gem_base);

	*handle_p = handle;
	return 0;
}

struct drm_gem_object *vkms_gem_create(struct drm_device *dev,
				       struct drm_file *file,
				       u32 *handle,
				       u64 size)
{
	struct vkms_gem_object *obj;
	int ret;

	if (!file || !dev || !handle)
		return ERR_PTR(-EINVAL);

	obj = __vkms_gem_create(dev, size);
	if (IS_ERR(obj))
		return ERR_CAST(obj);

	ret = drm_gem_handle_create(file, &obj->gem, handle);
	drm_gem_object_put_unlocked(&obj->gem);
	if (ret) {
		drm_gem_object_release(&obj->gem);
		kfree(obj);
		return ERR_PTR(ret);
	}

	return &obj->gem;
}

struct tegra_bo *tegra_bo_create_with_handle(struct drm_file *file,
					     struct drm_device *drm,
					     unsigned int size,
					     unsigned long flags,
					     unsigned int *handle)
{
	struct tegra_bo *bo;
	int ret;

	bo = tegra_bo_create(drm, size, flags);
	if (IS_ERR(bo))
		return bo;

	ret = drm_gem_handle_create(file, &bo->gem, handle);
	if (ret)
		goto err;

	drm_gem_object_unreference_unlocked(&bo->gem);

	return bo;

err:
	tegra_bo_free_object(&bo->gem);
	return ERR_PTR(ret);
}

int qxl_gem_object_create_with_handle(struct qxl_device *qdev,
				      struct drm_file *file_priv,
				      u32 domain,
				      size_t size,
				      struct qxl_surface *surf,
				      struct qxl_bo **qobj,
				      uint32_t *handle)
{
	struct drm_gem_object *gobj;
	int r;

	BUG_ON(!qobj);
	BUG_ON(!handle);

	r = qxl_gem_object_create(qdev, size, 0,
				  domain,
				  false, false, surf,
				  &gobj);
	if (r)
		return -ENOMEM;
	r = drm_gem_handle_create(file_priv, gobj, handle);
	if (r)
		return r;
	/* drop reference from allocate - handle holds it now */
	*qobj = gem_to_qxl_bo(gobj);
	drm_gem_object_unreference_unlocked(gobj);
	return 0;
}

/**
 * Open an object using the global name, returning a handle and the size.
 *
 * This handle (of course) holds a reference to the object, so the object
 * will not go away until the handle is deleted.
 */
int
drm_gem_open_ioctl(struct drm_device *dev, void *data,
                   struct drm_file *file_priv)
{
    struct drm_gem_open *args = data;
    struct drm_gem_object *obj;
    int ret;
    u32 handle;

    if (!(dev->driver->driver_features & DRIVER_GEM))
        return -ENODEV;

    spin_lock(&dev->object_name_lock);
    obj = idr_find(&dev->object_name_idr, (int) args->name);
    if (obj)
        drm_gem_object_reference(obj);
    spin_unlock(&dev->object_name_lock);
    if (!obj)
        return -ENOENT;

    ret = drm_gem_handle_create(file_priv, obj, &handle);
    drm_gem_object_unreference_unlocked(obj);
    if (ret)
        return ret;

    args->handle = handle;
    args->size = obj->size;

    return 0;
}

int radeon_mode_dumb_create(struct drm_file *file_priv,
			    struct drm_device *dev,
			    struct drm_mode_create_dumb *args)
{
	struct radeon_device *rdev = dev->dev_private;
	struct drm_gem_object *gobj;
	uint32_t handle;
	int r;

	args->pitch = radeon_align_pitch(rdev, args->width, args->bpp, 0) * ((args->bpp + 1) / 8);
	args->size = args->pitch * args->height;
	args->size = roundup2(args->size, PAGE_SIZE);

	r = radeon_gem_object_create(rdev, args->size, 0,
				     RADEON_GEM_DOMAIN_VRAM,
				     false, ttm_bo_type_device,
				     &gobj);
	if (r)
		return -ENOMEM;

	handle = 0;
	r = drm_gem_handle_create(file_priv, gobj, &handle);
	/* drop reference from allocate - handle holds it now */
	drm_gem_object_unreference_unlocked(gobj);
	if (r) {
		return r;
	}
	args->handle = handle;
	return 0;
}

/**
 * drm_gem_cma_create_with_handle - allocate an object with the given size and
 *     return a GEM handle to it
 * @file_priv: DRM file-private structure to register the handle for
 * @drm: DRM device
 * @size: size of the object to allocate
 * @handle: return location for the GEM handle
 *
 * This function creates a CMA GEM object, allocating a physically contiguous
 * chunk of memory as backing store. The GEM object is then added to the list
 * of object associated with the given file and a handle to it is returned.
 *
 * Returns:
 * A struct drm_gem_cma_object * on success or an ERR_PTR()-encoded negative
 * error code on failure.
 */
static struct drm_gem_cma_object *
drm_gem_cma_create_with_handle(struct drm_file *file_priv,
			       struct drm_device *drm, size_t size,
			       uint32_t *handle)
{
	struct drm_gem_cma_object *cma_obj;
	struct drm_gem_object *gem_obj;
	int ret;

	cma_obj = drm_gem_cma_create(drm, size);
	if (IS_ERR(cma_obj))
		return cma_obj;

	gem_obj = &cma_obj->base;

	/*
	 * allocate a id of idr table where the obj is registered
	 * and handle has the id what user can see.
	 */
	ret = drm_gem_handle_create(file_priv, gem_obj, handle);
	if (ret)
		goto err_handle_create;

	/* drop reference from allocate - handle holds it now. */
	drm_gem_object_unreference_unlocked(gem_obj);

	return cma_obj;

err_handle_create:
	drm->driver->gem_free_object(gem_obj);

	return ERR_PTR(ret);
}

static int tegra_fb_create_handle(struct drm_framebuffer *framebuffer,
				  struct drm_file *file, unsigned int *handle)
{
	struct tegra_fb *fb = to_tegra_fb(framebuffer);

	return drm_gem_handle_create(file, &fb->planes[0]->gem, handle);
}

static int omap_framebuffer_create_handle(struct drm_framebuffer *fb,
		struct drm_file *file_priv,
		unsigned int *handle)
{
	struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
    return drm_gem_handle_create(file_priv, omap_fb->bo, handle);
}

int
nouveau_gem_ioctl_new(struct drm_device *dev, void *data,
		      struct drm_file *file_priv)
{
	struct drm_nouveau_private *dev_priv = dev->dev_private;
	struct drm_nouveau_gem_new *req = data;
	struct nouveau_bo *nvbo = NULL;
	int ret = 0;

	if (unlikely(dev_priv->ttm.bdev.dev_mapping == NULL))
		dev_priv->ttm.bdev.dev_mapping = dev_priv->dev->dev_mapping;

	if (!dev_priv->engine.vram.flags_valid(dev, req->info.tile_flags)) {
		NV_ERROR(dev, "bad page flags: 0x%08x\n", req->info.tile_flags);
		return -EINVAL;
	}

	ret = nouveau_gem_new(dev, req->info.size, req->align,
			      req->info.domain, req->info.tile_mode,
			      req->info.tile_flags, &nvbo);
	if (ret)
		return ret;

	ret = drm_gem_handle_create(file_priv, nvbo->gem, &req->info.handle);
	if (ret == 0) {
		ret = nouveau_gem_info(file_priv, nvbo->gem, &req->info);
		if (ret)
			drm_gem_handle_delete(file_priv, req->info.handle);
	}

	
	drm_gem_object_unreference_unlocked(nvbo->gem);
	return ret;
}