The branch main has been updated by andrew: URL: https://cgit.FreeBSD.org/src/commit/?id=c8167ebb742c36cb1fc32cc543afb4016b4fc174
commit c8167ebb742c36cb1fc32cc543afb4016b4fc174 Author: Andrew Turner <[email protected]> AuthorDate: 2026-05-05 09:16:23 +0000 Commit: Andrew Turner <[email protected]> CommitDate: 2026-05-05 09:18:14 +0000 Revert "virtio_net: Use bus_dma for command/ack buffers" This reverts commit b5bad6df467cc95bea641afe674c55cd5b9f1510. Revert until we can fix reported issues --- sys/dev/virtio/network/if_vtnet.c | 336 ++++++----------------------------- sys/dev/virtio/network/if_vtnetvar.h | 6 - 2 files changed, 58 insertions(+), 284 deletions(-) diff --git a/sys/dev/virtio/network/if_vtnet.c b/sys/dev/virtio/network/if_vtnet.c index 40792482672c..e88602a44664 100644 --- a/sys/dev/virtio/network/if_vtnet.c +++ b/sys/dev/virtio/network/if_vtnet.c @@ -219,7 +219,7 @@ static void vtnet_init_locked(struct vtnet_softc *, int); static void vtnet_init(void *); static void vtnet_free_ctrl_vq(struct vtnet_softc *); -static int vtnet_exec_ctrl_cmd(struct vtnet_softc *, uint8_t *, +static void vtnet_exec_ctrl_cmd(struct vtnet_softc *, void *, struct sglist *, int, int); static int vtnet_ctrl_mac_cmd(struct vtnet_softc *, uint8_t *); static int vtnet_ctrl_guest_offloads(struct vtnet_softc *, uint64_t); @@ -523,50 +523,6 @@ vtnet_attach(device_t dev) goto fail; } - mtx_init(&sc->vtnet_hdr_mtx, device_get_nameunit(dev), - "VirtIO Net header lock", MTX_DEF); - - error = bus_dma_tag_create( - bus_get_dma_tag(dev), /* parent */ - sizeof(uint16_t), /* alignment */ - 0, /* boundary */ - BUS_SPACE_MAXADDR, /* lowaddr */ - BUS_SPACE_MAXADDR, /* highaddr */ - NULL, NULL, /* filter, filterarg */ - PAGE_SIZE, /* max request size */ - 1, /* max # segments */ - PAGE_SIZE, /* maxsegsize */ - BUS_DMA_COHERENT, /* flags */ - busdma_lock_mutex, /* lockfunc */ - &sc->vtnet_hdr_mtx, /* lockarg */ - &sc->vtnet_hdr_dmat); - if (error) { - device_printf(dev, "cannot create bus_dma_tag\n"); - goto fail; - } - - mtx_init(&sc->vtnet_ack_mtx, device_get_nameunit(dev), - "VirtIO Net ACK lock", MTX_DEF); - - error = bus_dma_tag_create( - bus_get_dma_tag(dev), /* parent */ - sizeof(uint8_t), /* alignment */ - 0, /* boundary */ - BUS_SPACE_MAXADDR, /* lowaddr */ - BUS_SPACE_MAXADDR, /* highaddr */ - NULL, NULL, /* filter, filterarg */ - sizeof(uint8_t), /* max request size */ - 1, /* max # segments */ - sizeof(uint8_t), /* maxsegsize */ - BUS_DMA_COHERENT, /* flags */ - busdma_lock_mutex, /* lockfunc */ - &sc->vtnet_ack_mtx, /* lockarg */ - &sc->vtnet_ack_dmat); - if (error) { - device_printf(dev, "cannot create bus_dma_tag\n"); - goto fail; - } - #ifdef __powerpc__ /* * Virtio uses physical addresses rather than bus addresses, so we @@ -575,8 +531,6 @@ vtnet_attach(device_t dev) */ bus_dma_tag_set_iommu(sc->vtnet_rx_dmat, NULL, NULL); bus_dma_tag_set_iommu(sc->vtnet_tx_dmat, NULL, NULL); - bus_dma_tag_set_iommu(sc->vtnet_hdr_dmat, NULL, NULL); - bus_dma_tag_set_iommu(sc->vtnet_ack_dmat, NULL, NULL); #endif error = vtnet_alloc_rx_filters(sc); @@ -3797,43 +3751,10 @@ vtnet_free_ctrl_vq(struct vtnet_softc *sc) } static void -vtnet_load_callback(void *arg, bus_dma_segment_t *segs, int nsegs, - int error) +vtnet_exec_ctrl_cmd(struct vtnet_softc *sc, void *cookie, + struct sglist *sg, int readable, int writable) { - bus_addr_t *paddr; - - if (error != 0) - return; - - KASSERT(nsegs == 1, ("%s: %d segments returned!", __func__, nsegs)); - - paddr = (bus_addr_t *)arg; - *paddr = segs[0].ds_addr; -} - -static int -vtnet_exec_ctrl_cmd(struct vtnet_softc *sc, uint8_t *ack, struct sglist *sg, - int readable, int writable) -{ - bus_dmamap_t ack_dmap; - bus_addr_t ack_paddr; struct virtqueue *vq; - int error; - - error = bus_dmamap_create(sc->vtnet_ack_dmat, 0, &ack_dmap); - if (error) - goto error_out; - - error = bus_dmamap_load(sc->vtnet_ack_dmat, ack_dmap, ack, - sizeof(uint8_t), vtnet_load_callback, &ack_paddr, BUS_DMA_NOWAIT); - if (error) - goto error_destroy; - - bus_dmamap_sync(sc->vtnet_ack_dmat, ack_dmap, BUS_DMASYNC_PREWRITE); - - error = sglist_append_phys(sg, ack_paddr, sizeof(uint8_t)); - if (error) - goto error_unload; vq = sc->vtnet_ctrl_vq; @@ -3841,237 +3762,152 @@ vtnet_exec_ctrl_cmd(struct vtnet_softc *sc, uint8_t *ack, struct sglist *sg, VTNET_CORE_LOCK_ASSERT(sc); if (!virtqueue_empty(vq)) - goto error_unload; + return; /* * Poll for the response, but the command is likely completed before * returning from the notify. */ - if (virtqueue_enqueue(vq, (void *)ack, sg, readable, writable) == 0) { + if (virtqueue_enqueue(vq, cookie, sg, readable, writable) == 0) { virtqueue_notify(vq); virtqueue_poll(vq, NULL); } - - bus_dmamap_sync(sc->vtnet_ack_dmat, ack_dmap, BUS_DMASYNC_POSTREAD); - -error_unload: - bus_dmamap_unload(sc->vtnet_ack_dmat, ack_dmap); -error_destroy: - bus_dmamap_destroy(sc->vtnet_ack_dmat, ack_dmap); -error_out: - return (error); } static int vtnet_ctrl_mac_cmd(struct vtnet_softc *sc, uint8_t *hwaddr) { struct sglist_seg segs[3]; - bus_dmamap_t hdr_dmap; - bus_addr_t hdr_paddr; struct sglist sg; struct { struct virtio_net_ctrl_hdr hdr __aligned(2); uint8_t pad1; uint8_t addr[ETHER_ADDR_LEN] __aligned(8); uint8_t pad2; + uint8_t ack; } s; - uint8_t ack; int error; - error = bus_dmamap_create(sc->vtnet_hdr_dmat, 0, &hdr_dmap); - if (error) - goto error_out; - - error = bus_dmamap_load(sc->vtnet_hdr_dmat, hdr_dmap, &s, - sizeof(s), vtnet_load_callback, &hdr_paddr, BUS_DMA_NOWAIT); - if (error) - goto error_destroy_hdr; - + error = 0; MPASS(sc->vtnet_flags & VTNET_FLAG_CTRL_MAC); s.hdr.class = VIRTIO_NET_CTRL_MAC; s.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET; bcopy(hwaddr, &s.addr[0], ETHER_ADDR_LEN); - ack = VIRTIO_NET_ERR; - bus_dmamap_sync(sc->vtnet_hdr_dmat, hdr_dmap, BUS_DMASYNC_PREWRITE); + s.ack = VIRTIO_NET_ERR; sglist_init(&sg, nitems(segs), segs); - error |= sglist_append_phys(&sg, hdr_paddr, - sizeof(struct virtio_net_ctrl_hdr)); - error |= sglist_append_phys(&sg, - hdr_paddr + ((uintptr_t)&s.addr - (uintptr_t)&s), - ETHER_ADDR_LEN); - MPASS(error == 0 && sg.sg_nseg == nitems(segs) - 1); + error |= sglist_append(&sg, &s.hdr, sizeof(struct virtio_net_ctrl_hdr)); + error |= sglist_append(&sg, &s.addr[0], ETHER_ADDR_LEN); + error |= sglist_append(&sg, &s.ack, sizeof(uint8_t)); + MPASS(error == 0 && sg.sg_nseg == nitems(segs)); if (error == 0) - error = vtnet_exec_ctrl_cmd(sc, &ack, &sg, sg.sg_nseg, 1); - if (error == 0) - error = (ack == VIRTIO_NET_OK ? 0 : EIO); + vtnet_exec_ctrl_cmd(sc, &s.ack, &sg, sg.sg_nseg - 1, 1); - bus_dmamap_unload(sc->vtnet_hdr_dmat, hdr_dmap); -error_destroy_hdr: - bus_dmamap_destroy(sc->vtnet_hdr_dmat, hdr_dmap); -error_out: - return (error); + return (s.ack == VIRTIO_NET_OK ? 0 : EIO); } static int vtnet_ctrl_guest_offloads(struct vtnet_softc *sc, uint64_t offloads) { struct sglist_seg segs[3]; - bus_dmamap_t hdr_dmap; - bus_addr_t hdr_paddr; struct sglist sg; struct { struct virtio_net_ctrl_hdr hdr __aligned(2); uint8_t pad1; uint64_t offloads __aligned(8); uint8_t pad2; + uint8_t ack; } s; - uint8_t ack; int error; - error = bus_dmamap_create(sc->vtnet_hdr_dmat, 0, &hdr_dmap); - if (error) - goto error_out; - - error = bus_dmamap_load(sc->vtnet_hdr_dmat, hdr_dmap, &s, - sizeof(s), vtnet_load_callback, &hdr_paddr, BUS_DMA_NOWAIT); - if (error) - goto error_destroy_hdr; - + error = 0; MPASS(sc->vtnet_features & VIRTIO_NET_F_CTRL_GUEST_OFFLOADS); s.hdr.class = VIRTIO_NET_CTRL_GUEST_OFFLOADS; s.hdr.cmd = VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET; s.offloads = vtnet_gtoh64(sc, offloads); - ack = VIRTIO_NET_ERR; - bus_dmamap_sync(sc->vtnet_hdr_dmat, hdr_dmap, BUS_DMASYNC_PREWRITE); + s.ack = VIRTIO_NET_ERR; sglist_init(&sg, nitems(segs), segs); - error |= sglist_append_phys(&sg, hdr_paddr, - sizeof(struct virtio_net_ctrl_hdr)); - error |= sglist_append_phys(&sg, - hdr_paddr + ((uintptr_t)&s.offloads - (uintptr_t)&s), - sizeof(uint64_t)); - MPASS(error == 0 && sg.sg_nseg == nitems(segs) - 1); + error |= sglist_append(&sg, &s.hdr, sizeof(struct virtio_net_ctrl_hdr)); + error |= sglist_append(&sg, &s.offloads, sizeof(uint64_t)); + error |= sglist_append(&sg, &s.ack, sizeof(uint8_t)); + MPASS(error == 0 && sg.sg_nseg == nitems(segs)); if (error == 0) - error = vtnet_exec_ctrl_cmd(sc, &ack, &sg, sg.sg_nseg, 1); - if (error == 0) - error = (ack == VIRTIO_NET_OK ? 0 : EIO); + vtnet_exec_ctrl_cmd(sc, &s.ack, &sg, sg.sg_nseg - 1, 1); - bus_dmamap_unload(sc->vtnet_hdr_dmat, hdr_dmap); -error_destroy_hdr: - bus_dmamap_destroy(sc->vtnet_hdr_dmat, hdr_dmap); -error_out: - return (error); + return (s.ack == VIRTIO_NET_OK ? 0 : EIO); } static int vtnet_ctrl_mq_cmd(struct vtnet_softc *sc, uint16_t npairs) { struct sglist_seg segs[3]; - bus_dmamap_t hdr_dmap; - bus_addr_t hdr_paddr; struct sglist sg; struct { struct virtio_net_ctrl_hdr hdr __aligned(2); uint8_t pad1; struct virtio_net_ctrl_mq mq __aligned(2); uint8_t pad2; + uint8_t ack; } s; - uint8_t ack; int error; - error = bus_dmamap_create(sc->vtnet_hdr_dmat, 0, &hdr_dmap); - if (error) - goto error_out; - - error = bus_dmamap_load(sc->vtnet_hdr_dmat, hdr_dmap, &s, - sizeof(s), vtnet_load_callback, &hdr_paddr, BUS_DMA_NOWAIT); - if (error) - goto error_destroy_hdr; - + error = 0; MPASS(sc->vtnet_flags & VTNET_FLAG_MQ); s.hdr.class = VIRTIO_NET_CTRL_MQ; s.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET; s.mq.virtqueue_pairs = vtnet_gtoh16(sc, npairs); - ack = VIRTIO_NET_ERR; - bus_dmamap_sync(sc->vtnet_hdr_dmat, hdr_dmap, BUS_DMASYNC_PREWRITE); + s.ack = VIRTIO_NET_ERR; sglist_init(&sg, nitems(segs), segs); - error |= sglist_append_phys(&sg, hdr_paddr, - sizeof(struct virtio_net_ctrl_hdr)); - error |= sglist_append_phys(&sg, - hdr_paddr + ((uintptr_t)&s.mq - (uintptr_t)&s), - sizeof(struct virtio_net_ctrl_mq)); - MPASS(error == 0 && sg.sg_nseg == nitems(segs) - 1); + error |= sglist_append(&sg, &s.hdr, sizeof(struct virtio_net_ctrl_hdr)); + error |= sglist_append(&sg, &s.mq, sizeof(struct virtio_net_ctrl_mq)); + error |= sglist_append(&sg, &s.ack, sizeof(uint8_t)); + MPASS(error == 0 && sg.sg_nseg == nitems(segs)); if (error == 0) - error = vtnet_exec_ctrl_cmd(sc, &ack, &sg, sg.sg_nseg, 1); - if (error == 0) - error = (ack == VIRTIO_NET_OK ? 0 : EIO); + vtnet_exec_ctrl_cmd(sc, &s.ack, &sg, sg.sg_nseg - 1, 1); - bus_dmamap_unload(sc->vtnet_hdr_dmat, hdr_dmap); -error_destroy_hdr: - bus_dmamap_destroy(sc->vtnet_hdr_dmat, hdr_dmap); -error_out: - return (error); + return (s.ack == VIRTIO_NET_OK ? 0 : EIO); } static int vtnet_ctrl_rx_cmd(struct vtnet_softc *sc, uint8_t cmd, bool on) { struct sglist_seg segs[3]; - bus_dmamap_t hdr_dmap; - bus_addr_t hdr_paddr; struct sglist sg; struct { struct virtio_net_ctrl_hdr hdr __aligned(2); uint8_t pad1; uint8_t onoff; uint8_t pad2; + uint8_t ack; } s; - uint8_t ack; int error; - error = bus_dmamap_create(sc->vtnet_hdr_dmat, 0, &hdr_dmap); - if (error) - goto error_out; - - error = bus_dmamap_load(sc->vtnet_hdr_dmat, hdr_dmap, &s, - sizeof(s), vtnet_load_callback, &hdr_paddr, BUS_DMA_NOWAIT); - if (error) - goto error_destroy_hdr; - + error = 0; MPASS(sc->vtnet_flags & VTNET_FLAG_CTRL_RX); s.hdr.class = VIRTIO_NET_CTRL_RX; s.hdr.cmd = cmd; s.onoff = on; - ack = VIRTIO_NET_ERR; - bus_dmamap_sync(sc->vtnet_hdr_dmat, hdr_dmap, BUS_DMASYNC_PREWRITE); + s.ack = VIRTIO_NET_ERR; sglist_init(&sg, nitems(segs), segs); - error |= sglist_append_phys(&sg, hdr_paddr, - sizeof(struct virtio_net_ctrl_hdr)); - error |= sglist_append_phys(&sg, - hdr_paddr + ((uintptr_t)&s.onoff - (uintptr_t)&s), - sizeof(uint8_t)); - MPASS(error == 0 && sg.sg_nseg == nitems(segs) - 1); + error |= sglist_append(&sg, &s.hdr, sizeof(struct virtio_net_ctrl_hdr)); + error |= sglist_append(&sg, &s.onoff, sizeof(uint8_t)); + error |= sglist_append(&sg, &s.ack, sizeof(uint8_t)); + MPASS(error == 0 && sg.sg_nseg == nitems(segs)); if (error == 0) - error = vtnet_exec_ctrl_cmd(sc, &ack, &sg, sg.sg_nseg, 1); - if (error == 0) - error = (ack == VIRTIO_NET_OK ? 0 : EIO); + vtnet_exec_ctrl_cmd(sc, &s.ack, &sg, sg.sg_nseg - 1, 1); - bus_dmamap_unload(sc->vtnet_hdr_dmat, hdr_dmap); -error_destroy_hdr: - bus_dmamap_destroy(sc->vtnet_hdr_dmat, hdr_dmap); -error_out: - return (error); + return (s.ack == VIRTIO_NET_OK ? 0 : EIO); } static int @@ -4142,10 +3978,6 @@ vtnet_rx_filter_mac(struct vtnet_softc *sc) struct virtio_net_ctrl_hdr hdr __aligned(2); struct vtnet_mac_filter *filter; struct sglist_seg segs[4]; - bus_dmamap_t filter_dmap; - bus_addr_t filter_paddr; - bus_dmamap_t hdr_dmap; - bus_addr_t hdr_paddr; struct sglist sg; if_t ifp; bool promisc, allmulti; @@ -4185,25 +4017,6 @@ vtnet_rx_filter_mac(struct vtnet_softc *sc) if (promisc && allmulti) goto out; - error = bus_dmamap_create(sc->vtnet_hdr_dmat, 0, &hdr_dmap); - if (error) - goto out_error; - - error = bus_dmamap_load(sc->vtnet_hdr_dmat, hdr_dmap, &hdr, - sizeof(hdr), vtnet_load_callback, &hdr_paddr, BUS_DMA_NOWAIT); - if (error) - goto out_destroy_hdr; - - error = bus_dmamap_create(sc->vtnet_hdr_dmat, 0, &filter_dmap); - if (error) - goto out_unload_hdr; - - error = bus_dmamap_load(sc->vtnet_hdr_dmat, hdr_dmap, filter, - sizeof(*filter), vtnet_load_callback, &filter_paddr, - BUS_DMA_NOWAIT); - if (error) - goto out_destroy_filter; - filter->vmf_unicast.nentries = vtnet_gtoh32(sc, ucnt); filter->vmf_multicast.nentries = vtnet_gtoh32(sc, mcnt); @@ -4212,33 +4025,19 @@ vtnet_rx_filter_mac(struct vtnet_softc *sc) ack = VIRTIO_NET_ERR; sglist_init(&sg, nitems(segs), segs); - error |= sglist_append_phys(&sg, hdr_paddr, - sizeof(struct virtio_net_ctrl_hdr)); - error |= sglist_append_phys(&sg, - filter_paddr + ((uintptr_t)&filter->vmf_unicast - - (uintptr_t)filter), + error |= sglist_append(&sg, &hdr, sizeof(struct virtio_net_ctrl_hdr)); + error |= sglist_append(&sg, &filter->vmf_unicast, sizeof(uint32_t) + ucnt * ETHER_ADDR_LEN); - error |= sglist_append_phys(&sg, - filter_paddr + ((uintptr_t)&filter->vmf_multicast - - (uintptr_t)filter), + error |= sglist_append(&sg, &filter->vmf_multicast, sizeof(uint32_t) + mcnt * ETHER_ADDR_LEN); - MPASS(error == 0 && sg.sg_nseg == nitems(segs) - 1); + error |= sglist_append(&sg, &ack, sizeof(uint8_t)); + MPASS(error == 0 && sg.sg_nseg == nitems(segs)); if (error == 0) - error = vtnet_exec_ctrl_cmd(sc, &ack, &sg, sg.sg_nseg, 1); - if (error == 0) - error = (ack == VIRTIO_NET_OK ? 0 : EIO); - - bus_dmamap_unload(sc->vtnet_hdr_dmat, filter_dmap); -out_destroy_filter: - bus_dmamap_destroy(sc->vtnet_hdr_dmat, filter_dmap); -out_unload_hdr: - bus_dmamap_unload(sc->vtnet_hdr_dmat, hdr_dmap); -out_destroy_hdr: - bus_dmamap_destroy(sc->vtnet_hdr_dmat, hdr_dmap); -out_error: - if (error != 0) + vtnet_exec_ctrl_cmd(sc, &ack, &sg, sg.sg_nseg - 1, 1); + if (ack != VIRTIO_NET_OK) if_printf(ifp, "error setting host MAC filter table\n"); + out: if (promisc && vtnet_set_promisc(sc, true) != 0) if_printf(ifp, "cannot enable promiscuous mode\n"); @@ -4250,53 +4049,34 @@ static int vtnet_exec_vlan_filter(struct vtnet_softc *sc, int add, uint16_t tag) { struct sglist_seg segs[3]; - bus_dmamap_t hdr_dmap; - bus_addr_t hdr_paddr; struct sglist sg; struct { struct virtio_net_ctrl_hdr hdr __aligned(2); uint8_t pad1; uint16_t tag __aligned(2); uint8_t pad2; + uint8_t ack; } s; - uint8_t ack; int error; - error = bus_dmamap_create(sc->vtnet_hdr_dmat, 0, &hdr_dmap); - if (error) - goto error_out; - - error = bus_dmamap_load(sc->vtnet_hdr_dmat, hdr_dmap, &s, - sizeof(s), vtnet_load_callback, &hdr_paddr, BUS_DMA_NOWAIT); - if (error) - goto error_destroy_hdr; - + error = 0; MPASS(sc->vtnet_flags & VTNET_FLAG_VLAN_FILTER); s.hdr.class = VIRTIO_NET_CTRL_VLAN; s.hdr.cmd = add ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL; s.tag = vtnet_gtoh16(sc, tag); - ack = VIRTIO_NET_ERR; - bus_dmamap_sync(sc->vtnet_hdr_dmat, hdr_dmap, BUS_DMASYNC_PREWRITE); + s.ack = VIRTIO_NET_ERR; sglist_init(&sg, nitems(segs), segs); - error |= sglist_append_phys(&sg, hdr_paddr, - sizeof(struct virtio_net_ctrl_hdr)); - error |= sglist_append_phys(&sg, - hdr_paddr + ((uintptr_t)&s.tag - (uintptr_t)&s), - sizeof(uint16_t)); - MPASS(error == 0 && sg.sg_nseg == nitems(segs) - 1); + error |= sglist_append(&sg, &s.hdr, sizeof(struct virtio_net_ctrl_hdr)); + error |= sglist_append(&sg, &s.tag, sizeof(uint16_t)); + error |= sglist_append(&sg, &s.ack, sizeof(uint8_t)); + MPASS(error == 0 && sg.sg_nseg == nitems(segs)); if (error == 0) - error = vtnet_exec_ctrl_cmd(sc, &ack, &sg, sg.sg_nseg, 1); - if (error == 0) - error = (ack == VIRTIO_NET_OK ? 0 : EIO); + vtnet_exec_ctrl_cmd(sc, &s.ack, &sg, sg.sg_nseg - 1, 1); - bus_dmamap_unload(sc->vtnet_hdr_dmat, hdr_dmap); -error_destroy_hdr: - bus_dmamap_destroy(sc->vtnet_hdr_dmat, hdr_dmap); -error_out: - return (error); + return (s.ack == VIRTIO_NET_OK ? 0 : EIO); } static void diff --git a/sys/dev/virtio/network/if_vtnetvar.h b/sys/dev/virtio/network/if_vtnetvar.h index e445bdf6d6cb..6cafe827d733 100644 --- a/sys/dev/virtio/network/if_vtnetvar.h +++ b/sys/dev/virtio/network/if_vtnetvar.h @@ -196,12 +196,6 @@ struct vtnet_softc { bus_dma_tag_t vtnet_tx_dmat; struct mtx vtnet_tx_mtx; - - bus_dma_tag_t vtnet_hdr_dmat; - struct mtx vtnet_hdr_mtx; - - bus_dma_tag_t vtnet_ack_dmat; - struct mtx vtnet_ack_mtx; }; /* vtnet flag descriptions for use with printf(9) %b identifier. */ #define VTNET_FLAGS_BITS \
