diff options
| author | Xuan Zhuo <xuanzhuo@linux.alibaba.com> | 2023-08-10 20:30:56 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2023-09-03 18:10:23 -0400 |
| commit | 8bd2f71054bd0bc997833e9825143672eb7e2801 (patch) | |
| tree | d311672bfc9f0faad96a12cbf835a874dadefadd /include/linux/virtio.h | |
| parent | b6253b4e21939f1bb54e8fdb84c23af9c3fb834a (diff) | |
virtio_ring: introduce dma sync api for virtqueue
These API has been introduced:
* virtqueue_dma_need_sync
* virtqueue_dma_sync_single_range_for_cpu
* virtqueue_dma_sync_single_range_for_device
These APIs can be used together with the premapped mechanism to sync the
DMA address.
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Message-Id: <20230810123057.43407-12-xuanzhuo@linux.alibaba.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include/linux/virtio.h')
| -rw-r--r-- | include/linux/virtio.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/virtio.h b/include/linux/virtio.h index 79e3c74391e0..1311a7fbe675 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -220,4 +220,12 @@ void virtqueue_dma_unmap_single_attrs(struct virtqueue *_vq, dma_addr_t addr, size_t size, enum dma_data_direction dir, unsigned long attrs); int virtqueue_dma_mapping_error(struct virtqueue *_vq, dma_addr_t addr); + +bool virtqueue_dma_need_sync(struct virtqueue *_vq, dma_addr_t addr); +void virtqueue_dma_sync_single_range_for_cpu(struct virtqueue *_vq, dma_addr_t addr, + unsigned long offset, size_t size, + enum dma_data_direction dir); +void virtqueue_dma_sync_single_range_for_device(struct virtqueue *_vq, dma_addr_t addr, + unsigned long offset, size_t size, + enum dma_data_direction dir); #endif /* _LINUX_VIRTIO_H */ |