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 \