From 2df64759071bdca2a12edb9af4f071e4419ad745 Mon Sep 17 00:00:00 2001 From: Xuan Zhuo Date: Thu, 10 Aug 2023 20:30:50 +0800 Subject: virtio_ring: introduce virtqueue_dma_dev() Added virtqueue_dma_dev() to get DMA device for virtio. Then the caller can do dma operation in advance. The purpose is to keep memory mapped across multiple add/get buf operations. Signed-off-by: Xuan Zhuo Acked-by: Jason Wang Message-Id: <20230810123057.43407-6-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin --- include/linux/virtio.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/virtio.h b/include/linux/virtio.h index 8add38038877..bd55a05eec04 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -61,6 +61,8 @@ int virtqueue_add_sgs(struct virtqueue *vq, void *data, gfp_t gfp); +struct device *virtqueue_dma_dev(struct virtqueue *vq); + bool virtqueue_kick(struct virtqueue *vq); bool virtqueue_kick_prepare(struct virtqueue *vq); -- cgit v1.2.3