static struct vdpa_notification_area mlx5_get_vq_notification(struct vdpa_device *vdev, u16 idx)
{
+ struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
struct vdpa_notification_area ret = {};
+ struct mlx5_vdpa_net *ndev;
+ phys_addr_t addr;
+ /* If SF BAR size is smaller than PAGE_SIZE, do not use direct
+ * notification to avoid the risk of mapping pages that contain BAR of more
+ * than one SF
+ */
+ if (MLX5_CAP_GEN(mvdev->mdev, log_min_sf_size) + 12 < PAGE_SHIFT)
+ return ret;
+
+ ndev = to_mlx5_vdpa_ndev(mvdev);
+ addr = (phys_addr_t)ndev->mvdev.res.phys_kick_addr;
+ ret.addr = addr;
+ ret.size = PAGE_SIZE;
return ret;
}