search for: virtqueue_get_buf_premapped

Displaying 3 results from an estimated 3 matches for "virtqueue_get_buf_premapped".

2023 Jun 02
12
[PATCH vhost v10 00/10] virtio core prepares for AF_XDP
## About DMA APIs Now, virtio may can not work with DMA APIs when virtio features do not have VIRTIO_F_ACCESS_PLATFORM. 1. I tried to let DMA APIs return phy address by virtio-device. But DMA APIs just work with the "real" devices. 2. I tried to let xsk support callballs to get phy address from virtio-net driver as the dma address. But the maintainers of xsk may want to use
2023 Jun 02
12
[PATCH vhost v10 00/10] virtio core prepares for AF_XDP
## About DMA APIs Now, virtio may can not work with DMA APIs when virtio features do not have VIRTIO_F_ACCESS_PLATFORM. 1. I tried to let DMA APIs return phy address by virtio-device. But DMA APIs just work with the "real" devices. 2. I tried to let xsk support callballs to get phy address from virtio-net driver as the dma address. But the maintainers of xsk may want to use
2023 Jun 22
1
[PATCH vhost v10 10/10] virtio_net: support dma premapped
...return buf; > +} > + > +static void *virtnet_get_buf_ctx(struct virtqueue *vq, bool premapped, u32 *len, void **ctx) > +{ > + struct virtqueue_detach_cursor cursor; > + void *buf; > + > + if (!premapped) > + return virtqueue_get_buf_ctx(vq, len, ctx); > + > + buf = virtqueue_get_buf_premapped(vq, len, ctx, &cursor); > + if (buf) > + virtnet_generic_unmap(vq, &cursor); > + > + return buf; > +} > + > +#define virtnet_rq_get_buf(rq, plen, pctx) \ > +({ \ > + typeof(rq) _rq = (rq); \ > + virtnet_get_buf_ctx(_rq->vq, _rq->premapped, plen, pctx); \...