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| author | Jason Wang <jasowang@redhat.com> | 2025-08-21 14:46:36 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2025-10-01 07:24:43 -0400 |
| commit | b16060c5c7d56455da3c3c50b4a20a83c2a30810 (patch) | |
| tree | 26ccf12be6288a3df6925c0109f5387efb99a7eb /drivers/virtio/virtio_vdpa.c | |
| parent | b41cb3bcf67fcb7b8297e5acc5bb3309c96c2ff2 (diff) | |
| download | lwn-b16060c5c7d56455da3c3c50b4a20a83c2a30810.tar.gz lwn-b16060c5c7d56455da3c3c50b4a20a83c2a30810.zip | |
virtio: introduce virtio_map container union
Following patch will introduce the mapping operations for virtio
device. In order to achieve this, besides the dma device, virtio core
needs to support a transport or device specific mapping metadata as well.
So this patch introduces a union container of a dma device. The idea
is the allow the transport layer to pass device specific mapping
metadata which will be used as a parameter for the virtio mapping
operations. For the transport or device that is using DMA, dma device
is still being used.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20250821064641.5025-5-jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Eugenio Pérez <eperezma@redhat.com>
Diffstat (limited to 'drivers/virtio/virtio_vdpa.c')
| -rw-r--r-- | drivers/virtio/virtio_vdpa.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/virtio/virtio_vdpa.c b/drivers/virtio/virtio_vdpa.c index 657b07a60788..dc557aa7c825 100644 --- a/drivers/virtio/virtio_vdpa.c +++ b/drivers/virtio/virtio_vdpa.c @@ -139,6 +139,7 @@ virtio_vdpa_setup_vq(struct virtio_device *vdev, unsigned int index, struct vdpa_callback cb; struct virtqueue *vq; u64 desc_addr, driver_addr, device_addr; + union virtio_map map = {0}; /* Assume split virtqueue, switch to packed if necessary */ struct vdpa_vq_state state = {0}; u32 align, max_num, min_num = 1; @@ -185,9 +186,10 @@ virtio_vdpa_setup_vq(struct virtio_device *vdev, unsigned int index, dma_dev = ops->get_vq_dma_dev(vdpa, index); else dma_dev = vdpa_get_dma_dev(vdpa); - vq = vring_create_virtqueue_dma(index, max_num, align, vdev, + map.dma_dev = dma_dev; + vq = vring_create_virtqueue_map(index, max_num, align, vdev, true, may_reduce_num, ctx, - notify, callback, name, dma_dev); + notify, callback, name, map); if (!vq) { err = -ENOMEM; goto error_new_virtqueue; |