Ejemplos de vmw_kms_readback en C++ (Cpp)

Ejemplo n.º 1

Archivo: vmwgfx_ioctl.c Proyecto: BozkurTR/kernel

int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
			       struct drm_file *file_priv)
{
	struct vmw_private *dev_priv = vmw_priv(dev);
	struct drm_vmw_present_readback_arg *arg =
		(struct drm_vmw_present_readback_arg *)data;
	struct drm_vmw_fence_rep __user *user_fence_rep =
		(struct drm_vmw_fence_rep __user *)
		(unsigned long)arg->fence_rep;
	struct vmw_master *vmaster = vmw_master(file_priv->master);
	struct drm_vmw_rect __user *clips_ptr;
	struct drm_vmw_rect *clips = NULL;
	struct drm_framebuffer *fb;
	struct vmw_framebuffer *vfb;
	uint32_t num_clips;
	int ret;

	num_clips = arg->num_clips;
	clips_ptr = (struct drm_vmw_rect *)(unsigned long)arg->clips_ptr;

	if (unlikely(num_clips == 0))
		return 0;

	if (clips_ptr == NULL) {
		DRM_ERROR("Argument clips_ptr must be specified.\n");
		ret = -EINVAL;
		goto out_clips;
	}

	clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
	if (clips == NULL) {
		DRM_ERROR("Failed to allocate clip rect list.\n");
		ret = -ENOMEM;
		goto out_clips;
	}

	ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
	if (ret) {
		DRM_ERROR("Failed to copy clip rects from userspace.\n");
		ret = -EFAULT;
		goto out_no_copy;
	}

	drm_modeset_lock_all(dev);

	fb = drm_framebuffer_lookup(dev, arg->fb_id);
	if (!fb) {
		DRM_ERROR("Invalid framebuffer id.\n");
		ret = -ENOENT;
		goto out_no_fb;
	}

	vfb = vmw_framebuffer_to_vfb(fb);
	if (!vfb->dmabuf) {
		DRM_ERROR("Framebuffer not dmabuf backed.\n");
		ret = -EINVAL;
		goto out_no_ttm_lock;
	}

	ret = ttm_read_lock(&vmaster->lock, true);
	if (unlikely(ret != 0))
		goto out_no_ttm_lock;

	ret = vmw_kms_readback(dev_priv, file_priv,
			       vfb, user_fence_rep,
			       clips, num_clips);

	ttm_read_unlock(&vmaster->lock);
out_no_ttm_lock:
	drm_framebuffer_unreference(fb);
out_no_fb:
	drm_modeset_unlock_all(dev);
out_no_copy:
	kfree(clips);
out_clips:
	return ret;
}

Ejemplo n.º 2

Archivo: vmwgfx_ioctl.c Proyecto: openube/android_kernel_sony_c2305

int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
			       struct drm_file *file_priv)
{
	struct vmw_private *dev_priv = vmw_priv(dev);
	struct drm_vmw_present_readback_arg *arg =
		(struct drm_vmw_present_readback_arg *)data;
	struct drm_vmw_fence_rep __user *user_fence_rep =
		(struct drm_vmw_fence_rep __user *)
		(unsigned long)arg->fence_rep;
	struct vmw_master *vmaster = vmw_master(file_priv->master);
	struct drm_vmw_rect __user *clips_ptr;
	struct drm_vmw_rect *clips = NULL;
	struct drm_mode_object *obj;
	struct vmw_framebuffer *vfb;
	uint32_t num_clips;
	int ret;

	num_clips = arg->num_clips;
	clips_ptr = (struct drm_vmw_rect *)(unsigned long)arg->clips_ptr;

	if (unlikely(num_clips == 0))
		return 0;

	if (clips_ptr == NULL) {
		DRM_ERROR("Argument clips_ptr must be specified.\n");
		ret = -EINVAL;
		goto out_clips;
	}

	clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
	if (clips == NULL) {
		DRM_ERROR("Failed to allocate clip rect list.\n");
		ret = -ENOMEM;
		goto out_clips;
	}

	ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
	if (ret) {
		DRM_ERROR("Failed to copy clip rects from userspace.\n");
		ret = -EFAULT;
		goto out_no_copy;
	}

	ret = mutex_lock_interruptible(&dev->mode_config.mutex);
	if (unlikely(ret != 0)) {
		ret = -ERESTARTSYS;
		goto out_no_mode_mutex;
	}

	obj = drm_mode_object_find(dev, arg->fb_id, DRM_MODE_OBJECT_FB);
	if (!obj) {
		DRM_ERROR("Invalid framebuffer id.\n");
		ret = -EINVAL;
		goto out_no_fb;
	}

	vfb = vmw_framebuffer_to_vfb(obj_to_fb(obj));
	if (!vfb->dmabuf) {
		DRM_ERROR("Framebuffer not dmabuf backed.\n");
		ret = -EINVAL;
		goto out_no_fb;
	}

	ret = ttm_read_lock(&vmaster->lock, true);
	if (unlikely(ret != 0))
		goto out_no_ttm_lock;

	ret = vmw_kms_readback(dev_priv, file_priv,
			       vfb, user_fence_rep,
			       clips, num_clips);

	ttm_read_unlock(&vmaster->lock);
out_no_ttm_lock:
out_no_fb:
	mutex_unlock(&dev->mode_config.mutex);
out_no_mode_mutex:
out_no_copy:
	kfree(clips);
out_clips:
	return ret;
}