1 // Copyright © 2021 Intel Corporation 2 // 3 // SPDX-License-Identifier: Apache-2.0 OR BSD-3-Clause 4 5 /// Trait meant for triggering the DMA mapping update related to an external 6 /// device not managed fully through virtio. It is dedicated to virtio-iommu 7 /// in order to trigger the map update anytime the mapping is updated from the 8 /// guest. 9 pub trait ExternalDmaMapping: Send + Sync { 10 /// Map a memory range 11 fn map(&self, iova: u64, gpa: u64, size: u64) -> std::result::Result<(), std::io::Error>; 12 13 /// Unmap a memory range 14 fn unmap(&self, iova: u64, size: u64) -> std::result::Result<(), std::io::Error>; 15 } 16