4428 lines
108 KiB
C
4428 lines
108 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2011, Bryan Venteicher <bryanv@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* Driver for VirtIO network devices. */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/eventhandler.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/sockio.h>
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#include <sys/mbuf.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/socket.h>
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#include <sys/sysctl.h>
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#include <sys/random.h>
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#include <sys/sglist.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/taskqueue.h>
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#include <sys/smp.h>
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#include <machine/smp.h>
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#include <vm/uma.h>
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#include <net/debugnet.h>
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#include <net/ethernet.h>
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#include <net/pfil.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/if_arp.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#include <net/if_media.h>
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#include <net/if_vlan_var.h>
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#include <net/bpf.h>
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#include <netinet/in_systm.h>
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#include <netinet/in.h>
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#include <netinet/ip.h>
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#include <netinet/ip6.h>
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#include <netinet6/ip6_var.h>
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#include <netinet/udp.h>
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#include <netinet/tcp.h>
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#include <netinet/tcp_lro.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/bus.h>
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#include <sys/rman.h>
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#include <dev/virtio/virtio.h>
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#include <dev/virtio/virtqueue.h>
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#include <dev/virtio/network/virtio_net.h>
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#include <dev/virtio/network/if_vtnetvar.h>
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#include "virtio_if.h"
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#if defined(INET) || defined(INET6)
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#include <machine/in_cksum.h>
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#endif
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static int vtnet_modevent(module_t, int, void *);
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static int vtnet_probe(device_t);
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static int vtnet_attach(device_t);
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static int vtnet_detach(device_t);
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static int vtnet_suspend(device_t);
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static int vtnet_resume(device_t);
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static int vtnet_shutdown(device_t);
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static int vtnet_attach_completed(device_t);
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static int vtnet_config_change(device_t);
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static int vtnet_negotiate_features(struct vtnet_softc *);
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static int vtnet_setup_features(struct vtnet_softc *);
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static int vtnet_init_rxq(struct vtnet_softc *, int);
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static int vtnet_init_txq(struct vtnet_softc *, int);
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static int vtnet_alloc_rxtx_queues(struct vtnet_softc *);
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static void vtnet_free_rxtx_queues(struct vtnet_softc *);
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static int vtnet_alloc_rx_filters(struct vtnet_softc *);
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static void vtnet_free_rx_filters(struct vtnet_softc *);
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static int vtnet_alloc_virtqueues(struct vtnet_softc *);
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static int vtnet_alloc_interface(struct vtnet_softc *);
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static int vtnet_setup_interface(struct vtnet_softc *);
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static int vtnet_ioctl_mtu(struct vtnet_softc *, u_int);
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static int vtnet_ioctl_ifflags(struct vtnet_softc *);
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static int vtnet_ioctl_multi(struct vtnet_softc *);
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static int vtnet_ioctl_ifcap(struct vtnet_softc *, struct ifreq *);
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static int vtnet_ioctl(struct ifnet *, u_long, caddr_t);
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static uint64_t vtnet_get_counter(struct ifnet *, ift_counter);
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static int vtnet_rxq_populate(struct vtnet_rxq *);
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static void vtnet_rxq_free_mbufs(struct vtnet_rxq *);
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static struct mbuf *
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vtnet_rx_alloc_buf(struct vtnet_softc *, int , struct mbuf **);
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static int vtnet_rxq_replace_lro_nomrg_buf(struct vtnet_rxq *,
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struct mbuf *, int);
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static int vtnet_rxq_replace_buf(struct vtnet_rxq *, struct mbuf *, int);
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static int vtnet_rxq_enqueue_buf(struct vtnet_rxq *, struct mbuf *);
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static int vtnet_rxq_new_buf(struct vtnet_rxq *);
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static int vtnet_rxq_csum_needs_csum(struct vtnet_rxq *, struct mbuf *,
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uint16_t, int, struct virtio_net_hdr *);
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static int vtnet_rxq_csum_data_valid(struct vtnet_rxq *, struct mbuf *,
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uint16_t, int, struct virtio_net_hdr *);
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static int vtnet_rxq_csum(struct vtnet_rxq *, struct mbuf *,
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struct virtio_net_hdr *);
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static void vtnet_rxq_discard_merged_bufs(struct vtnet_rxq *, int);
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static void vtnet_rxq_discard_buf(struct vtnet_rxq *, struct mbuf *);
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static int vtnet_rxq_merged_eof(struct vtnet_rxq *, struct mbuf *, int);
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static void vtnet_rxq_input(struct vtnet_rxq *, struct mbuf *,
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struct virtio_net_hdr *);
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static int vtnet_rxq_eof(struct vtnet_rxq *);
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static void vtnet_rx_vq_process(struct vtnet_rxq *rxq, int tries);
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static void vtnet_rx_vq_intr(void *);
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static void vtnet_rxq_tq_intr(void *, int);
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static int vtnet_txq_intr_threshold(struct vtnet_txq *);
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static int vtnet_txq_below_threshold(struct vtnet_txq *);
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static int vtnet_txq_notify(struct vtnet_txq *);
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static void vtnet_txq_free_mbufs(struct vtnet_txq *);
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static int vtnet_txq_offload_ctx(struct vtnet_txq *, struct mbuf *,
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int *, int *, int *);
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static int vtnet_txq_offload_tso(struct vtnet_txq *, struct mbuf *, int,
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int, struct virtio_net_hdr *);
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static struct mbuf *
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vtnet_txq_offload(struct vtnet_txq *, struct mbuf *,
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struct virtio_net_hdr *);
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static int vtnet_txq_enqueue_buf(struct vtnet_txq *, struct mbuf **,
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struct vtnet_tx_header *);
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static int vtnet_txq_encap(struct vtnet_txq *, struct mbuf **, int);
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#ifdef VTNET_LEGACY_TX
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static void vtnet_start_locked(struct vtnet_txq *, struct ifnet *);
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static void vtnet_start(struct ifnet *);
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#else
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static int vtnet_txq_mq_start_locked(struct vtnet_txq *, struct mbuf *);
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static int vtnet_txq_mq_start(struct ifnet *, struct mbuf *);
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static void vtnet_txq_tq_deferred(void *, int);
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#endif
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static void vtnet_txq_start(struct vtnet_txq *);
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static void vtnet_txq_tq_intr(void *, int);
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static int vtnet_txq_eof(struct vtnet_txq *);
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static void vtnet_tx_vq_intr(void *);
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static void vtnet_tx_start_all(struct vtnet_softc *);
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#ifndef VTNET_LEGACY_TX
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static void vtnet_qflush(struct ifnet *);
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#endif
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static int vtnet_watchdog(struct vtnet_txq *);
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static void vtnet_accum_stats(struct vtnet_softc *,
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struct vtnet_rxq_stats *, struct vtnet_txq_stats *);
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static void vtnet_tick(void *);
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static void vtnet_start_taskqueues(struct vtnet_softc *);
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static void vtnet_free_taskqueues(struct vtnet_softc *);
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static void vtnet_drain_taskqueues(struct vtnet_softc *);
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static void vtnet_drain_rxtx_queues(struct vtnet_softc *);
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static void vtnet_stop_rendezvous(struct vtnet_softc *);
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static void vtnet_stop(struct vtnet_softc *);
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static int vtnet_virtio_reinit(struct vtnet_softc *);
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static void vtnet_init_rx_filters(struct vtnet_softc *);
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static int vtnet_init_rx_queues(struct vtnet_softc *);
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static int vtnet_init_tx_queues(struct vtnet_softc *);
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static int vtnet_init_rxtx_queues(struct vtnet_softc *);
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static void vtnet_set_active_vq_pairs(struct vtnet_softc *);
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static void vtnet_update_rx_offloads(struct vtnet_softc *);
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static int vtnet_reinit(struct vtnet_softc *);
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static void vtnet_init_locked(struct vtnet_softc *, int);
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static void vtnet_init(void *);
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static void vtnet_free_ctrl_vq(struct vtnet_softc *);
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static void vtnet_exec_ctrl_cmd(struct vtnet_softc *, void *,
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struct sglist *, int, int);
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static int vtnet_ctrl_mac_cmd(struct vtnet_softc *, uint8_t *);
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static int vtnet_ctrl_guest_offloads(struct vtnet_softc *, uint64_t);
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static int vtnet_ctrl_mq_cmd(struct vtnet_softc *, uint16_t);
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static int vtnet_ctrl_rx_cmd(struct vtnet_softc *, uint8_t, bool);
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static int vtnet_set_promisc(struct vtnet_softc *, bool);
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static int vtnet_set_allmulti(struct vtnet_softc *, bool);
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static void vtnet_rx_filter(struct vtnet_softc *);
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static void vtnet_rx_filter_mac(struct vtnet_softc *);
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static int vtnet_exec_vlan_filter(struct vtnet_softc *, int, uint16_t);
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static void vtnet_rx_filter_vlan(struct vtnet_softc *);
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static void vtnet_update_vlan_filter(struct vtnet_softc *, int, uint16_t);
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static void vtnet_register_vlan(void *, struct ifnet *, uint16_t);
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static void vtnet_unregister_vlan(void *, struct ifnet *, uint16_t);
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static void vtnet_update_speed_duplex(struct vtnet_softc *);
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static int vtnet_is_link_up(struct vtnet_softc *);
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static void vtnet_update_link_status(struct vtnet_softc *);
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static int vtnet_ifmedia_upd(struct ifnet *);
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static void vtnet_ifmedia_sts(struct ifnet *, struct ifmediareq *);
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static void vtnet_get_macaddr(struct vtnet_softc *);
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static void vtnet_set_macaddr(struct vtnet_softc *);
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static void vtnet_attached_set_macaddr(struct vtnet_softc *);
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static void vtnet_vlan_tag_remove(struct mbuf *);
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static void vtnet_set_rx_process_limit(struct vtnet_softc *);
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static void vtnet_setup_rxq_sysctl(struct sysctl_ctx_list *,
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struct sysctl_oid_list *, struct vtnet_rxq *);
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static void vtnet_setup_txq_sysctl(struct sysctl_ctx_list *,
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struct sysctl_oid_list *, struct vtnet_txq *);
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static void vtnet_setup_queue_sysctl(struct vtnet_softc *);
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static void vtnet_load_tunables(struct vtnet_softc *);
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static void vtnet_setup_sysctl(struct vtnet_softc *);
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static int vtnet_rxq_enable_intr(struct vtnet_rxq *);
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static void vtnet_rxq_disable_intr(struct vtnet_rxq *);
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static int vtnet_txq_enable_intr(struct vtnet_txq *);
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static void vtnet_txq_disable_intr(struct vtnet_txq *);
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static void vtnet_enable_rx_interrupts(struct vtnet_softc *);
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static void vtnet_enable_tx_interrupts(struct vtnet_softc *);
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static void vtnet_enable_interrupts(struct vtnet_softc *);
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static void vtnet_disable_rx_interrupts(struct vtnet_softc *);
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static void vtnet_disable_tx_interrupts(struct vtnet_softc *);
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static void vtnet_disable_interrupts(struct vtnet_softc *);
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static int vtnet_tunable_int(struct vtnet_softc *, const char *, int);
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DEBUGNET_DEFINE(vtnet);
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#define vtnet_htog16(_sc, _val) virtio_htog16(vtnet_modern(_sc), _val)
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#define vtnet_htog32(_sc, _val) virtio_htog32(vtnet_modern(_sc), _val)
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#define vtnet_htog64(_sc, _val) virtio_htog64(vtnet_modern(_sc), _val)
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#define vtnet_gtoh16(_sc, _val) virtio_gtoh16(vtnet_modern(_sc), _val)
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#define vtnet_gtoh32(_sc, _val) virtio_gtoh32(vtnet_modern(_sc), _val)
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#define vtnet_gtoh64(_sc, _val) virtio_gtoh64(vtnet_modern(_sc), _val)
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/* Tunables. */
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static SYSCTL_NODE(_hw, OID_AUTO, vtnet, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
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"VirtIO Net driver parameters");
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static int vtnet_csum_disable = 0;
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SYSCTL_INT(_hw_vtnet, OID_AUTO, csum_disable, CTLFLAG_RDTUN,
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&vtnet_csum_disable, 0, "Disables receive and send checksum offload");
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static int vtnet_fixup_needs_csum = 0;
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SYSCTL_INT(_hw_vtnet, OID_AUTO, fixup_needs_csum, CTLFLAG_RDTUN,
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&vtnet_fixup_needs_csum, 0,
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"Calculate valid checksum for NEEDS_CSUM packets");
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static int vtnet_tso_disable = 0;
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SYSCTL_INT(_hw_vtnet, OID_AUTO, tso_disable, CTLFLAG_RDTUN,
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&vtnet_tso_disable, 0, "Disables TSO");
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static int vtnet_lro_disable = 0;
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SYSCTL_INT(_hw_vtnet, OID_AUTO, lro_disable, CTLFLAG_RDTUN,
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&vtnet_lro_disable, 0, "Disables hardware LRO");
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static int vtnet_mq_disable = 0;
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SYSCTL_INT(_hw_vtnet, OID_AUTO, mq_disable, CTLFLAG_RDTUN,
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&vtnet_mq_disable, 0, "Disables multiqueue support");
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static int vtnet_mq_max_pairs = VTNET_MAX_QUEUE_PAIRS;
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SYSCTL_INT(_hw_vtnet, OID_AUTO, mq_max_pairs, CTLFLAG_RDTUN,
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&vtnet_mq_max_pairs, 0, "Maximum number of multiqueue pairs");
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static int vtnet_tso_maxlen = IP_MAXPACKET;
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SYSCTL_INT(_hw_vtnet, OID_AUTO, tso_maxlen, CTLFLAG_RDTUN,
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&vtnet_tso_maxlen, 0, "TSO burst limit");
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static int vtnet_rx_process_limit = 1024;
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SYSCTL_INT(_hw_vtnet, OID_AUTO, rx_process_limit, CTLFLAG_RDTUN,
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&vtnet_rx_process_limit, 0,
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"Number of RX segments processed in one pass");
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static int vtnet_lro_entry_count = 128;
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SYSCTL_INT(_hw_vtnet, OID_AUTO, lro_entry_count, CTLFLAG_RDTUN,
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&vtnet_lro_entry_count, 0, "Software LRO entry count");
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/* Enable sorted LRO, and the depth of the mbuf queue. */
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static int vtnet_lro_mbufq_depth = 0;
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SYSCTL_UINT(_hw_vtnet, OID_AUTO, lro_mbufq_depth, CTLFLAG_RDTUN,
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&vtnet_lro_mbufq_depth, 0, "Depth of software LRO mbuf queue");
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static uma_zone_t vtnet_tx_header_zone;
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static struct virtio_feature_desc vtnet_feature_desc[] = {
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{ VIRTIO_NET_F_CSUM, "TxChecksum" },
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{ VIRTIO_NET_F_GUEST_CSUM, "RxChecksum" },
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{ VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, "CtrlRxOffloads" },
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{ VIRTIO_NET_F_MAC, "MAC" },
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{ VIRTIO_NET_F_GSO, "TxGSO" },
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{ VIRTIO_NET_F_GUEST_TSO4, "RxLROv4" },
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{ VIRTIO_NET_F_GUEST_TSO6, "RxLROv6" },
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{ VIRTIO_NET_F_GUEST_ECN, "RxLROECN" },
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{ VIRTIO_NET_F_GUEST_UFO, "RxUFO" },
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{ VIRTIO_NET_F_HOST_TSO4, "TxTSOv4" },
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{ VIRTIO_NET_F_HOST_TSO6, "TxTSOv6" },
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{ VIRTIO_NET_F_HOST_ECN, "TxTSOECN" },
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{ VIRTIO_NET_F_HOST_UFO, "TxUFO" },
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{ VIRTIO_NET_F_MRG_RXBUF, "MrgRxBuf" },
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{ VIRTIO_NET_F_STATUS, "Status" },
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{ VIRTIO_NET_F_CTRL_VQ, "CtrlVq" },
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{ VIRTIO_NET_F_CTRL_RX, "CtrlRxMode" },
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{ VIRTIO_NET_F_CTRL_VLAN, "CtrlVLANFilter" },
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{ VIRTIO_NET_F_CTRL_RX_EXTRA, "CtrlRxModeExtra" },
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{ VIRTIO_NET_F_GUEST_ANNOUNCE, "GuestAnnounce" },
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{ VIRTIO_NET_F_MQ, "Multiqueue" },
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{ VIRTIO_NET_F_CTRL_MAC_ADDR, "CtrlMacAddr" },
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{ VIRTIO_NET_F_SPEED_DUPLEX, "SpeedDuplex" },
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{ 0, NULL }
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};
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static device_method_t vtnet_methods[] = {
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/* Device methods. */
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DEVMETHOD(device_probe, vtnet_probe),
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DEVMETHOD(device_attach, vtnet_attach),
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DEVMETHOD(device_detach, vtnet_detach),
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DEVMETHOD(device_suspend, vtnet_suspend),
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DEVMETHOD(device_resume, vtnet_resume),
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DEVMETHOD(device_shutdown, vtnet_shutdown),
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/* VirtIO methods. */
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DEVMETHOD(virtio_attach_completed, vtnet_attach_completed),
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DEVMETHOD(virtio_config_change, vtnet_config_change),
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DEVMETHOD_END
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};
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#ifdef DEV_NETMAP
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#include <dev/netmap/if_vtnet_netmap.h>
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#endif
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static driver_t vtnet_driver = {
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.name = "vtnet",
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.methods = vtnet_methods,
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.size = sizeof(struct vtnet_softc)
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};
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static devclass_t vtnet_devclass;
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|
VIRTIO_DRIVER_MODULE(vtnet, vtnet_driver, vtnet_devclass,
|
|
vtnet_modevent, 0);
|
|
MODULE_VERSION(vtnet, 1);
|
|
MODULE_DEPEND(vtnet, virtio, 1, 1, 1);
|
|
#ifdef DEV_NETMAP
|
|
MODULE_DEPEND(vtnet, netmap, 1, 1, 1);
|
|
#endif
|
|
|
|
VIRTIO_SIMPLE_PNPINFO(vtnet, VIRTIO_ID_NETWORK, "VirtIO Networking Adapter");
|
|
|
|
static int
|
|
vtnet_modevent(module_t mod __unused, int type, void *unused __unused)
|
|
{
|
|
int error = 0;
|
|
static int loaded = 0;
|
|
|
|
switch (type) {
|
|
case MOD_LOAD:
|
|
if (loaded++ == 0) {
|
|
vtnet_tx_header_zone = uma_zcreate("vtnet_tx_hdr",
|
|
sizeof(struct vtnet_tx_header),
|
|
NULL, NULL, NULL, NULL, 0, 0);
|
|
#ifdef DEBUGNET
|
|
/*
|
|
* We need to allocate from this zone in the transmit path, so ensure
|
|
* that we have at least one item per header available.
|
|
* XXX add a separate zone like we do for mbufs? otherwise we may alloc
|
|
* buckets
|
|
*/
|
|
uma_zone_reserve(vtnet_tx_header_zone, DEBUGNET_MAX_IN_FLIGHT * 2);
|
|
uma_prealloc(vtnet_tx_header_zone, DEBUGNET_MAX_IN_FLIGHT * 2);
|
|
#endif
|
|
}
|
|
break;
|
|
case MOD_QUIESCE:
|
|
if (uma_zone_get_cur(vtnet_tx_header_zone) > 0)
|
|
error = EBUSY;
|
|
break;
|
|
case MOD_UNLOAD:
|
|
if (--loaded == 0) {
|
|
uma_zdestroy(vtnet_tx_header_zone);
|
|
vtnet_tx_header_zone = NULL;
|
|
}
|
|
break;
|
|
case MOD_SHUTDOWN:
|
|
break;
|
|
default:
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
vtnet_probe(device_t dev)
|
|
{
|
|
return (VIRTIO_SIMPLE_PROBE(dev, vtnet));
|
|
}
|
|
|
|
static int
|
|
vtnet_attach(device_t dev)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
int error;
|
|
|
|
sc = device_get_softc(dev);
|
|
sc->vtnet_dev = dev;
|
|
virtio_set_feature_desc(dev, vtnet_feature_desc);
|
|
|
|
VTNET_CORE_LOCK_INIT(sc);
|
|
callout_init_mtx(&sc->vtnet_tick_ch, VTNET_CORE_MTX(sc), 0);
|
|
vtnet_load_tunables(sc);
|
|
|
|
error = vtnet_alloc_interface(sc);
|
|
if (error) {
|
|
device_printf(dev, "cannot allocate interface\n");
|
|
goto fail;
|
|
}
|
|
|
|
vtnet_setup_sysctl(sc);
|
|
|
|
error = vtnet_setup_features(sc);
|
|
if (error) {
|
|
device_printf(dev, "cannot setup features\n");
|
|
goto fail;
|
|
}
|
|
|
|
error = vtnet_alloc_rx_filters(sc);
|
|
if (error) {
|
|
device_printf(dev, "cannot allocate Rx filters\n");
|
|
goto fail;
|
|
}
|
|
|
|
error = vtnet_alloc_rxtx_queues(sc);
|
|
if (error) {
|
|
device_printf(dev, "cannot allocate queues\n");
|
|
goto fail;
|
|
}
|
|
|
|
error = vtnet_alloc_virtqueues(sc);
|
|
if (error) {
|
|
device_printf(dev, "cannot allocate virtqueues\n");
|
|
goto fail;
|
|
}
|
|
|
|
error = vtnet_setup_interface(sc);
|
|
if (error) {
|
|
device_printf(dev, "cannot setup interface\n");
|
|
goto fail;
|
|
}
|
|
|
|
error = virtio_setup_intr(dev, INTR_TYPE_NET);
|
|
if (error) {
|
|
device_printf(dev, "cannot setup interrupts\n");
|
|
ether_ifdetach(sc->vtnet_ifp);
|
|
goto fail;
|
|
}
|
|
|
|
#ifdef DEV_NETMAP
|
|
vtnet_netmap_attach(sc);
|
|
#endif
|
|
vtnet_start_taskqueues(sc);
|
|
|
|
fail:
|
|
if (error)
|
|
vtnet_detach(dev);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
vtnet_detach(device_t dev)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct ifnet *ifp;
|
|
|
|
sc = device_get_softc(dev);
|
|
ifp = sc->vtnet_ifp;
|
|
|
|
if (device_is_attached(dev)) {
|
|
VTNET_CORE_LOCK(sc);
|
|
vtnet_stop(sc);
|
|
VTNET_CORE_UNLOCK(sc);
|
|
|
|
callout_drain(&sc->vtnet_tick_ch);
|
|
vtnet_drain_taskqueues(sc);
|
|
|
|
ether_ifdetach(ifp);
|
|
}
|
|
|
|
#ifdef DEV_NETMAP
|
|
netmap_detach(ifp);
|
|
#endif
|
|
|
|
vtnet_free_taskqueues(sc);
|
|
|
|
if (sc->vtnet_vlan_attach != NULL) {
|
|
EVENTHANDLER_DEREGISTER(vlan_config, sc->vtnet_vlan_attach);
|
|
sc->vtnet_vlan_attach = NULL;
|
|
}
|
|
if (sc->vtnet_vlan_detach != NULL) {
|
|
EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vtnet_vlan_detach);
|
|
sc->vtnet_vlan_detach = NULL;
|
|
}
|
|
|
|
ifmedia_removeall(&sc->vtnet_media);
|
|
|
|
if (ifp != NULL) {
|
|
if_free(ifp);
|
|
sc->vtnet_ifp = NULL;
|
|
}
|
|
|
|
vtnet_free_rxtx_queues(sc);
|
|
vtnet_free_rx_filters(sc);
|
|
|
|
if (sc->vtnet_ctrl_vq != NULL)
|
|
vtnet_free_ctrl_vq(sc);
|
|
|
|
VTNET_CORE_LOCK_DESTROY(sc);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vtnet_suspend(device_t dev)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
|
|
VTNET_CORE_LOCK(sc);
|
|
vtnet_stop(sc);
|
|
sc->vtnet_flags |= VTNET_FLAG_SUSPENDED;
|
|
VTNET_CORE_UNLOCK(sc);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vtnet_resume(device_t dev)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct ifnet *ifp;
|
|
|
|
sc = device_get_softc(dev);
|
|
ifp = sc->vtnet_ifp;
|
|
|
|
VTNET_CORE_LOCK(sc);
|
|
if (ifp->if_flags & IFF_UP)
|
|
vtnet_init_locked(sc, 0);
|
|
sc->vtnet_flags &= ~VTNET_FLAG_SUSPENDED;
|
|
VTNET_CORE_UNLOCK(sc);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vtnet_shutdown(device_t dev)
|
|
{
|
|
/*
|
|
* Suspend already does all of what we need to
|
|
* do here; we just never expect to be resumed.
|
|
*/
|
|
return (vtnet_suspend(dev));
|
|
}
|
|
|
|
static int
|
|
vtnet_attach_completed(device_t dev)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
|
|
VTNET_CORE_LOCK(sc);
|
|
vtnet_attached_set_macaddr(sc);
|
|
VTNET_CORE_UNLOCK(sc);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vtnet_config_change(device_t dev)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
|
|
VTNET_CORE_LOCK(sc);
|
|
vtnet_update_link_status(sc);
|
|
if (sc->vtnet_link_active != 0)
|
|
vtnet_tx_start_all(sc);
|
|
VTNET_CORE_UNLOCK(sc);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vtnet_negotiate_features(struct vtnet_softc *sc)
|
|
{
|
|
device_t dev;
|
|
uint64_t features, negotiated_features;
|
|
int no_csum;
|
|
|
|
dev = sc->vtnet_dev;
|
|
features = virtio_bus_is_modern(dev) ? VTNET_MODERN_FEATURES :
|
|
VTNET_LEGACY_FEATURES;
|
|
|
|
/*
|
|
* TSO and LRO are only available when their corresponding checksum
|
|
* offload feature is also negotiated.
|
|
*/
|
|
no_csum = vtnet_tunable_int(sc, "csum_disable", vtnet_csum_disable);
|
|
if (no_csum)
|
|
features &= ~(VIRTIO_NET_F_CSUM | VIRTIO_NET_F_GUEST_CSUM);
|
|
if (no_csum || vtnet_tunable_int(sc, "tso_disable", vtnet_tso_disable))
|
|
features &= ~VTNET_TSO_FEATURES;
|
|
if (no_csum || vtnet_tunable_int(sc, "lro_disable", vtnet_lro_disable))
|
|
features &= ~VTNET_LRO_FEATURES;
|
|
|
|
#ifndef VTNET_LEGACY_TX
|
|
if (vtnet_tunable_int(sc, "mq_disable", vtnet_mq_disable))
|
|
features &= ~VIRTIO_NET_F_MQ;
|
|
#else
|
|
features &= ~VIRTIO_NET_F_MQ;
|
|
#endif
|
|
|
|
negotiated_features = virtio_negotiate_features(dev, features);
|
|
|
|
if (virtio_with_feature(dev, VIRTIO_NET_F_MTU)) {
|
|
uint16_t mtu;
|
|
|
|
mtu = virtio_read_dev_config_2(dev,
|
|
offsetof(struct virtio_net_config, mtu));
|
|
if (mtu < VTNET_MIN_MTU /* || mtu > VTNET_MAX_MTU */) {
|
|
device_printf(dev, "Invalid MTU value: %d. "
|
|
"MTU feature disabled.\n", mtu);
|
|
features &= ~VIRTIO_NET_F_MTU;
|
|
negotiated_features =
|
|
virtio_negotiate_features(dev, features);
|
|
}
|
|
}
|
|
|
|
if (virtio_with_feature(dev, VIRTIO_NET_F_MQ)) {
|
|
uint16_t npairs;
|
|
|
|
npairs = virtio_read_dev_config_2(dev,
|
|
offsetof(struct virtio_net_config, max_virtqueue_pairs));
|
|
if (npairs < VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN ||
|
|
npairs > VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX) {
|
|
device_printf(dev, "Invalid max_virtqueue_pairs value: "
|
|
"%d. Multiqueue feature disabled.\n", npairs);
|
|
features &= ~VIRTIO_NET_F_MQ;
|
|
negotiated_features =
|
|
virtio_negotiate_features(dev, features);
|
|
}
|
|
}
|
|
|
|
if (virtio_with_feature(dev, VTNET_LRO_FEATURES) &&
|
|
virtio_with_feature(dev, VIRTIO_NET_F_MRG_RXBUF) == 0) {
|
|
/*
|
|
* LRO without mergeable buffers requires special care. This
|
|
* is not ideal because every receive buffer must be large
|
|
* enough to hold the maximum TCP packet, the Ethernet header,
|
|
* and the header. This requires up to 34 descriptors with
|
|
* MCLBYTES clusters. If we do not have indirect descriptors,
|
|
* LRO is disabled since the virtqueue will not contain very
|
|
* many receive buffers.
|
|
*/
|
|
if (!virtio_with_feature(dev, VIRTIO_RING_F_INDIRECT_DESC)) {
|
|
device_printf(dev,
|
|
"Host LRO disabled since both mergeable buffers "
|
|
"and indirect descriptors were not negotiated\n");
|
|
features &= ~VTNET_LRO_FEATURES;
|
|
negotiated_features =
|
|
virtio_negotiate_features(dev, features);
|
|
} else
|
|
sc->vtnet_flags |= VTNET_FLAG_LRO_NOMRG;
|
|
}
|
|
|
|
sc->vtnet_features = negotiated_features;
|
|
sc->vtnet_negotiated_features = negotiated_features;
|
|
|
|
return (virtio_finalize_features(dev));
|
|
}
|
|
|
|
static int
|
|
vtnet_setup_features(struct vtnet_softc *sc)
|
|
{
|
|
device_t dev;
|
|
int error;
|
|
|
|
dev = sc->vtnet_dev;
|
|
|
|
error = vtnet_negotiate_features(sc);
|
|
if (error)
|
|
return (error);
|
|
|
|
if (virtio_with_feature(dev, VIRTIO_F_VERSION_1))
|
|
sc->vtnet_flags |= VTNET_FLAG_MODERN;
|
|
if (virtio_with_feature(dev, VIRTIO_RING_F_INDIRECT_DESC))
|
|
sc->vtnet_flags |= VTNET_FLAG_INDIRECT;
|
|
if (virtio_with_feature(dev, VIRTIO_RING_F_EVENT_IDX))
|
|
sc->vtnet_flags |= VTNET_FLAG_EVENT_IDX;
|
|
|
|
if (virtio_with_feature(dev, VIRTIO_NET_F_MAC)) {
|
|
/* This feature should always be negotiated. */
|
|
sc->vtnet_flags |= VTNET_FLAG_MAC;
|
|
}
|
|
|
|
if (virtio_with_feature(dev, VIRTIO_NET_F_MTU)) {
|
|
sc->vtnet_max_mtu = virtio_read_dev_config_2(dev,
|
|
offsetof(struct virtio_net_config, mtu));
|
|
} else
|
|
sc->vtnet_max_mtu = VTNET_MAX_MTU;
|
|
|
|
if (virtio_with_feature(dev, VIRTIO_NET_F_MRG_RXBUF)) {
|
|
sc->vtnet_flags |= VTNET_FLAG_MRG_RXBUFS;
|
|
sc->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
|
|
} else if (vtnet_modern(sc)) {
|
|
/* This is identical to the mergeable header. */
|
|
sc->vtnet_hdr_size = sizeof(struct virtio_net_hdr_v1);
|
|
} else
|
|
sc->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
|
|
|
|
if (vtnet_modern(sc) || sc->vtnet_flags & VTNET_FLAG_MRG_RXBUFS)
|
|
sc->vtnet_rx_nsegs = VTNET_RX_SEGS_HDR_INLINE;
|
|
else if (sc->vtnet_flags & VTNET_FLAG_LRO_NOMRG)
|
|
sc->vtnet_rx_nsegs = VTNET_RX_SEGS_LRO_NOMRG;
|
|
else
|
|
sc->vtnet_rx_nsegs = VTNET_RX_SEGS_HDR_SEPARATE;
|
|
|
|
/*
|
|
* Favor "hardware" LRO if negotiated, but support software LRO as
|
|
* a fallback; there is usually little benefit (or worse) with both.
|
|
*/
|
|
if (virtio_with_feature(dev, VIRTIO_NET_F_GUEST_TSO4) == 0 &&
|
|
virtio_with_feature(dev, VIRTIO_NET_F_GUEST_TSO6) == 0)
|
|
sc->vtnet_flags |= VTNET_FLAG_SW_LRO;
|
|
|
|
if (virtio_with_feature(dev, VIRTIO_NET_F_GSO) ||
|
|
virtio_with_feature(dev, VIRTIO_NET_F_HOST_TSO4) ||
|
|
virtio_with_feature(dev, VIRTIO_NET_F_HOST_TSO6))
|
|
sc->vtnet_tx_nsegs = VTNET_TX_SEGS_MAX;
|
|
else
|
|
sc->vtnet_tx_nsegs = VTNET_TX_SEGS_MIN;
|
|
|
|
sc->vtnet_req_vq_pairs = 1;
|
|
sc->vtnet_max_vq_pairs = 1;
|
|
|
|
if (virtio_with_feature(dev, VIRTIO_NET_F_CTRL_VQ)) {
|
|
sc->vtnet_flags |= VTNET_FLAG_CTRL_VQ;
|
|
|
|
if (virtio_with_feature(dev, VIRTIO_NET_F_CTRL_RX))
|
|
sc->vtnet_flags |= VTNET_FLAG_CTRL_RX;
|
|
if (virtio_with_feature(dev, VIRTIO_NET_F_CTRL_VLAN))
|
|
sc->vtnet_flags |= VTNET_FLAG_VLAN_FILTER;
|
|
if (virtio_with_feature(dev, VIRTIO_NET_F_CTRL_MAC_ADDR))
|
|
sc->vtnet_flags |= VTNET_FLAG_CTRL_MAC;
|
|
|
|
if (virtio_with_feature(dev, VIRTIO_NET_F_MQ)) {
|
|
sc->vtnet_max_vq_pairs = virtio_read_dev_config_2(dev,
|
|
offsetof(struct virtio_net_config,
|
|
max_virtqueue_pairs));
|
|
}
|
|
}
|
|
|
|
if (sc->vtnet_max_vq_pairs > 1) {
|
|
int req;
|
|
|
|
/*
|
|
* Limit the maximum number of requested queue pairs to the
|
|
* number of CPUs and the configured maximum.
|
|
*/
|
|
req = vtnet_tunable_int(sc, "mq_max_pairs", vtnet_mq_max_pairs);
|
|
if (req < 0)
|
|
req = 1;
|
|
if (req == 0)
|
|
req = mp_ncpus;
|
|
if (req > sc->vtnet_max_vq_pairs)
|
|
req = sc->vtnet_max_vq_pairs;
|
|
if (req > mp_ncpus)
|
|
req = mp_ncpus;
|
|
if (req > 1) {
|
|
sc->vtnet_req_vq_pairs = req;
|
|
sc->vtnet_flags |= VTNET_FLAG_MQ;
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vtnet_init_rxq(struct vtnet_softc *sc, int id)
|
|
{
|
|
struct vtnet_rxq *rxq;
|
|
|
|
rxq = &sc->vtnet_rxqs[id];
|
|
|
|
snprintf(rxq->vtnrx_name, sizeof(rxq->vtnrx_name), "%s-rx%d",
|
|
device_get_nameunit(sc->vtnet_dev), id);
|
|
mtx_init(&rxq->vtnrx_mtx, rxq->vtnrx_name, NULL, MTX_DEF);
|
|
|
|
rxq->vtnrx_sc = sc;
|
|
rxq->vtnrx_id = id;
|
|
|
|
rxq->vtnrx_sg = sglist_alloc(sc->vtnet_rx_nsegs, M_NOWAIT);
|
|
if (rxq->vtnrx_sg == NULL)
|
|
return (ENOMEM);
|
|
|
|
#if defined(INET) || defined(INET6)
|
|
if (vtnet_software_lro(sc)) {
|
|
if (tcp_lro_init_args(&rxq->vtnrx_lro, sc->vtnet_ifp,
|
|
sc->vtnet_lro_entry_count, sc->vtnet_lro_mbufq_depth) != 0)
|
|
return (ENOMEM);
|
|
}
|
|
#endif
|
|
|
|
NET_TASK_INIT(&rxq->vtnrx_intrtask, 0, vtnet_rxq_tq_intr, rxq);
|
|
rxq->vtnrx_tq = taskqueue_create(rxq->vtnrx_name, M_NOWAIT,
|
|
taskqueue_thread_enqueue, &rxq->vtnrx_tq);
|
|
|
|
return (rxq->vtnrx_tq == NULL ? ENOMEM : 0);
|
|
}
|
|
|
|
static int
|
|
vtnet_init_txq(struct vtnet_softc *sc, int id)
|
|
{
|
|
struct vtnet_txq *txq;
|
|
|
|
txq = &sc->vtnet_txqs[id];
|
|
|
|
snprintf(txq->vtntx_name, sizeof(txq->vtntx_name), "%s-tx%d",
|
|
device_get_nameunit(sc->vtnet_dev), id);
|
|
mtx_init(&txq->vtntx_mtx, txq->vtntx_name, NULL, MTX_DEF);
|
|
|
|
txq->vtntx_sc = sc;
|
|
txq->vtntx_id = id;
|
|
|
|
txq->vtntx_sg = sglist_alloc(sc->vtnet_tx_nsegs, M_NOWAIT);
|
|
if (txq->vtntx_sg == NULL)
|
|
return (ENOMEM);
|
|
|
|
#ifndef VTNET_LEGACY_TX
|
|
txq->vtntx_br = buf_ring_alloc(VTNET_DEFAULT_BUFRING_SIZE, M_DEVBUF,
|
|
M_NOWAIT, &txq->vtntx_mtx);
|
|
if (txq->vtntx_br == NULL)
|
|
return (ENOMEM);
|
|
|
|
TASK_INIT(&txq->vtntx_defrtask, 0, vtnet_txq_tq_deferred, txq);
|
|
#endif
|
|
TASK_INIT(&txq->vtntx_intrtask, 0, vtnet_txq_tq_intr, txq);
|
|
txq->vtntx_tq = taskqueue_create(txq->vtntx_name, M_NOWAIT,
|
|
taskqueue_thread_enqueue, &txq->vtntx_tq);
|
|
if (txq->vtntx_tq == NULL)
|
|
return (ENOMEM);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vtnet_alloc_rxtx_queues(struct vtnet_softc *sc)
|
|
{
|
|
int i, npairs, error;
|
|
|
|
npairs = sc->vtnet_max_vq_pairs;
|
|
|
|
sc->vtnet_rxqs = malloc(sizeof(struct vtnet_rxq) * npairs, M_DEVBUF,
|
|
M_NOWAIT | M_ZERO);
|
|
sc->vtnet_txqs = malloc(sizeof(struct vtnet_txq) * npairs, M_DEVBUF,
|
|
M_NOWAIT | M_ZERO);
|
|
if (sc->vtnet_rxqs == NULL || sc->vtnet_txqs == NULL)
|
|
return (ENOMEM);
|
|
|
|
for (i = 0; i < npairs; i++) {
|
|
error = vtnet_init_rxq(sc, i);
|
|
if (error)
|
|
return (error);
|
|
error = vtnet_init_txq(sc, i);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
|
|
vtnet_set_rx_process_limit(sc);
|
|
vtnet_setup_queue_sysctl(sc);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
vtnet_destroy_rxq(struct vtnet_rxq *rxq)
|
|
{
|
|
|
|
rxq->vtnrx_sc = NULL;
|
|
rxq->vtnrx_id = -1;
|
|
|
|
#if defined(INET) || defined(INET6)
|
|
tcp_lro_free(&rxq->vtnrx_lro);
|
|
#endif
|
|
|
|
if (rxq->vtnrx_sg != NULL) {
|
|
sglist_free(rxq->vtnrx_sg);
|
|
rxq->vtnrx_sg = NULL;
|
|
}
|
|
|
|
if (mtx_initialized(&rxq->vtnrx_mtx) != 0)
|
|
mtx_destroy(&rxq->vtnrx_mtx);
|
|
}
|
|
|
|
static void
|
|
vtnet_destroy_txq(struct vtnet_txq *txq)
|
|
{
|
|
|
|
txq->vtntx_sc = NULL;
|
|
txq->vtntx_id = -1;
|
|
|
|
if (txq->vtntx_sg != NULL) {
|
|
sglist_free(txq->vtntx_sg);
|
|
txq->vtntx_sg = NULL;
|
|
}
|
|
|
|
#ifndef VTNET_LEGACY_TX
|
|
if (txq->vtntx_br != NULL) {
|
|
buf_ring_free(txq->vtntx_br, M_DEVBUF);
|
|
txq->vtntx_br = NULL;
|
|
}
|
|
#endif
|
|
|
|
if (mtx_initialized(&txq->vtntx_mtx) != 0)
|
|
mtx_destroy(&txq->vtntx_mtx);
|
|
}
|
|
|
|
static void
|
|
vtnet_free_rxtx_queues(struct vtnet_softc *sc)
|
|
{
|
|
int i;
|
|
|
|
if (sc->vtnet_rxqs != NULL) {
|
|
for (i = 0; i < sc->vtnet_max_vq_pairs; i++)
|
|
vtnet_destroy_rxq(&sc->vtnet_rxqs[i]);
|
|
free(sc->vtnet_rxqs, M_DEVBUF);
|
|
sc->vtnet_rxqs = NULL;
|
|
}
|
|
|
|
if (sc->vtnet_txqs != NULL) {
|
|
for (i = 0; i < sc->vtnet_max_vq_pairs; i++)
|
|
vtnet_destroy_txq(&sc->vtnet_txqs[i]);
|
|
free(sc->vtnet_txqs, M_DEVBUF);
|
|
sc->vtnet_txqs = NULL;
|
|
}
|
|
}
|
|
|
|
static int
|
|
vtnet_alloc_rx_filters(struct vtnet_softc *sc)
|
|
{
|
|
|
|
if (sc->vtnet_flags & VTNET_FLAG_CTRL_RX) {
|
|
sc->vtnet_mac_filter = malloc(sizeof(struct vtnet_mac_filter),
|
|
M_DEVBUF, M_NOWAIT | M_ZERO);
|
|
if (sc->vtnet_mac_filter == NULL)
|
|
return (ENOMEM);
|
|
}
|
|
|
|
if (sc->vtnet_flags & VTNET_FLAG_VLAN_FILTER) {
|
|
sc->vtnet_vlan_filter = malloc(sizeof(uint32_t) *
|
|
VTNET_VLAN_FILTER_NWORDS, M_DEVBUF, M_NOWAIT | M_ZERO);
|
|
if (sc->vtnet_vlan_filter == NULL)
|
|
return (ENOMEM);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
vtnet_free_rx_filters(struct vtnet_softc *sc)
|
|
{
|
|
|
|
if (sc->vtnet_mac_filter != NULL) {
|
|
free(sc->vtnet_mac_filter, M_DEVBUF);
|
|
sc->vtnet_mac_filter = NULL;
|
|
}
|
|
|
|
if (sc->vtnet_vlan_filter != NULL) {
|
|
free(sc->vtnet_vlan_filter, M_DEVBUF);
|
|
sc->vtnet_vlan_filter = NULL;
|
|
}
|
|
}
|
|
|
|
static int
|
|
vtnet_alloc_virtqueues(struct vtnet_softc *sc)
|
|
{
|
|
device_t dev;
|
|
struct vq_alloc_info *info;
|
|
struct vtnet_rxq *rxq;
|
|
struct vtnet_txq *txq;
|
|
int i, idx, flags, nvqs, error;
|
|
|
|
dev = sc->vtnet_dev;
|
|
flags = 0;
|
|
|
|
nvqs = sc->vtnet_max_vq_pairs * 2;
|
|
if (sc->vtnet_flags & VTNET_FLAG_CTRL_VQ)
|
|
nvqs++;
|
|
|
|
info = malloc(sizeof(struct vq_alloc_info) * nvqs, M_TEMP, M_NOWAIT);
|
|
if (info == NULL)
|
|
return (ENOMEM);
|
|
|
|
for (i = 0, idx = 0; i < sc->vtnet_req_vq_pairs; i++, idx += 2) {
|
|
rxq = &sc->vtnet_rxqs[i];
|
|
VQ_ALLOC_INFO_INIT(&info[idx], sc->vtnet_rx_nsegs,
|
|
vtnet_rx_vq_intr, rxq, &rxq->vtnrx_vq,
|
|
"%s-rx%d", device_get_nameunit(dev), rxq->vtnrx_id);
|
|
|
|
txq = &sc->vtnet_txqs[i];
|
|
VQ_ALLOC_INFO_INIT(&info[idx+1], sc->vtnet_tx_nsegs,
|
|
vtnet_tx_vq_intr, txq, &txq->vtntx_vq,
|
|
"%s-tx%d", device_get_nameunit(dev), txq->vtntx_id);
|
|
}
|
|
|
|
/* These queues will not be used so allocate the minimum resources. */
|
|
for (/**/; i < sc->vtnet_max_vq_pairs; i++, idx += 2) {
|
|
rxq = &sc->vtnet_rxqs[i];
|
|
VQ_ALLOC_INFO_INIT(&info[idx], 0, NULL, rxq, &rxq->vtnrx_vq,
|
|
"%s-rx%d", device_get_nameunit(dev), rxq->vtnrx_id);
|
|
|
|
txq = &sc->vtnet_txqs[i];
|
|
VQ_ALLOC_INFO_INIT(&info[idx+1], 0, NULL, txq, &txq->vtntx_vq,
|
|
"%s-tx%d", device_get_nameunit(dev), txq->vtntx_id);
|
|
}
|
|
|
|
if (sc->vtnet_flags & VTNET_FLAG_CTRL_VQ) {
|
|
VQ_ALLOC_INFO_INIT(&info[idx], 0, NULL, NULL,
|
|
&sc->vtnet_ctrl_vq, "%s ctrl", device_get_nameunit(dev));
|
|
}
|
|
|
|
/*
|
|
* TODO: Enable interrupt binding if this is multiqueue. This will
|
|
* only matter when per-virtqueue MSIX is available.
|
|
*/
|
|
if (sc->vtnet_flags & VTNET_FLAG_MQ)
|
|
flags |= 0;
|
|
|
|
error = virtio_alloc_virtqueues(dev, flags, nvqs, info);
|
|
free(info, M_TEMP);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
vtnet_alloc_interface(struct vtnet_softc *sc)
|
|
{
|
|
device_t dev;
|
|
struct ifnet *ifp;
|
|
|
|
dev = sc->vtnet_dev;
|
|
|
|
ifp = if_alloc(IFT_ETHER);
|
|
if (ifp == NULL)
|
|
return (ENOMEM);
|
|
|
|
sc->vtnet_ifp = ifp;
|
|
ifp->if_softc = sc;
|
|
if_initname(ifp, device_get_name(dev), device_get_unit(dev));
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vtnet_setup_interface(struct vtnet_softc *sc)
|
|
{
|
|
device_t dev;
|
|
struct pfil_head_args pa;
|
|
struct ifnet *ifp;
|
|
|
|
dev = sc->vtnet_dev;
|
|
ifp = sc->vtnet_ifp;
|
|
|
|
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST |
|
|
IFF_KNOWSEPOCH;
|
|
ifp->if_baudrate = IF_Gbps(10);
|
|
ifp->if_init = vtnet_init;
|
|
ifp->if_ioctl = vtnet_ioctl;
|
|
ifp->if_get_counter = vtnet_get_counter;
|
|
#ifndef VTNET_LEGACY_TX
|
|
ifp->if_transmit = vtnet_txq_mq_start;
|
|
ifp->if_qflush = vtnet_qflush;
|
|
#else
|
|
struct virtqueue *vq = sc->vtnet_txqs[0].vtntx_vq;
|
|
ifp->if_start = vtnet_start;
|
|
IFQ_SET_MAXLEN(&ifp->if_snd, virtqueue_size(vq) - 1);
|
|
ifp->if_snd.ifq_drv_maxlen = virtqueue_size(vq) - 1;
|
|
IFQ_SET_READY(&ifp->if_snd);
|
|
#endif
|
|
|
|
vtnet_get_macaddr(sc);
|
|
|
|
if (virtio_with_feature(dev, VIRTIO_NET_F_STATUS))
|
|
ifp->if_capabilities |= IFCAP_LINKSTATE;
|
|
|
|
ifmedia_init(&sc->vtnet_media, 0, vtnet_ifmedia_upd, vtnet_ifmedia_sts);
|
|
ifmedia_add(&sc->vtnet_media, IFM_ETHER | IFM_AUTO, 0, NULL);
|
|
ifmedia_set(&sc->vtnet_media, IFM_ETHER | IFM_AUTO);
|
|
|
|
if (virtio_with_feature(dev, VIRTIO_NET_F_CSUM)) {
|
|
int gso;
|
|
|
|
ifp->if_capabilities |= IFCAP_TXCSUM | IFCAP_TXCSUM_IPV6;
|
|
|
|
gso = virtio_with_feature(dev, VIRTIO_NET_F_GSO);
|
|
if (gso || virtio_with_feature(dev, VIRTIO_NET_F_HOST_TSO4))
|
|
ifp->if_capabilities |= IFCAP_TSO4;
|
|
if (gso || virtio_with_feature(dev, VIRTIO_NET_F_HOST_TSO6))
|
|
ifp->if_capabilities |= IFCAP_TSO6;
|
|
if (gso || virtio_with_feature(dev, VIRTIO_NET_F_HOST_ECN))
|
|
sc->vtnet_flags |= VTNET_FLAG_TSO_ECN;
|
|
|
|
if (ifp->if_capabilities & (IFCAP_TSO4 | IFCAP_TSO6)) {
|
|
int tso_maxlen;
|
|
|
|
ifp->if_capabilities |= IFCAP_VLAN_HWTSO;
|
|
|
|
tso_maxlen = vtnet_tunable_int(sc, "tso_maxlen",
|
|
vtnet_tso_maxlen);
|
|
ifp->if_hw_tsomax = tso_maxlen -
|
|
(ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN);
|
|
ifp->if_hw_tsomaxsegcount = sc->vtnet_tx_nsegs - 1;
|
|
ifp->if_hw_tsomaxsegsize = PAGE_SIZE;
|
|
}
|
|
}
|
|
|
|
if (virtio_with_feature(dev, VIRTIO_NET_F_GUEST_CSUM)) {
|
|
ifp->if_capabilities |= IFCAP_RXCSUM;
|
|
#ifdef notyet
|
|
/* BMV: Rx checksums not distinguished between IPv4 and IPv6. */
|
|
ifp->if_capabilities |= IFCAP_RXCSUM_IPV6;
|
|
#endif
|
|
|
|
if (vtnet_tunable_int(sc, "fixup_needs_csum",
|
|
vtnet_fixup_needs_csum) != 0)
|
|
sc->vtnet_flags |= VTNET_FLAG_FIXUP_NEEDS_CSUM;
|
|
|
|
/* Support either "hardware" or software LRO. */
|
|
ifp->if_capabilities |= IFCAP_LRO;
|
|
}
|
|
|
|
if (ifp->if_capabilities & (IFCAP_HWCSUM | IFCAP_HWCSUM_IPV6)) {
|
|
/*
|
|
* VirtIO does not support VLAN tagging, but we can fake
|
|
* it by inserting and removing the 802.1Q header during
|
|
* transmit and receive. We are then able to do checksum
|
|
* offloading of VLAN frames.
|
|
*/
|
|
ifp->if_capabilities |=
|
|
IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_HWCSUM;
|
|
}
|
|
|
|
if (sc->vtnet_max_mtu >= ETHERMTU_JUMBO)
|
|
ifp->if_capabilities |= IFCAP_JUMBO_MTU;
|
|
ifp->if_capabilities |= IFCAP_VLAN_MTU;
|
|
|
|
/*
|
|
* Capabilities after here are not enabled by default.
|
|
*/
|
|
ifp->if_capenable = ifp->if_capabilities;
|
|
|
|
if (sc->vtnet_flags & VTNET_FLAG_VLAN_FILTER) {
|
|
ifp->if_capabilities |= IFCAP_VLAN_HWFILTER;
|
|
|
|
sc->vtnet_vlan_attach = EVENTHANDLER_REGISTER(vlan_config,
|
|
vtnet_register_vlan, sc, EVENTHANDLER_PRI_FIRST);
|
|
sc->vtnet_vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig,
|
|
vtnet_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST);
|
|
}
|
|
|
|
ether_ifattach(ifp, sc->vtnet_hwaddr);
|
|
|
|
/* Tell the upper layer(s) we support long frames. */
|
|
ifp->if_hdrlen = sizeof(struct ether_vlan_header);
|
|
|
|
DEBUGNET_SET(ifp, vtnet);
|
|
|
|
pa.pa_version = PFIL_VERSION;
|
|
pa.pa_flags = PFIL_IN;
|
|
pa.pa_type = PFIL_TYPE_ETHERNET;
|
|
pa.pa_headname = ifp->if_xname;
|
|
sc->vtnet_pfil = pfil_head_register(&pa);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vtnet_rx_cluster_size(struct vtnet_softc *sc, int mtu)
|
|
{
|
|
int framesz;
|
|
|
|
if (sc->vtnet_flags & VTNET_FLAG_MRG_RXBUFS)
|
|
return (MJUMPAGESIZE);
|
|
else if (sc->vtnet_flags & VTNET_FLAG_LRO_NOMRG)
|
|
return (MCLBYTES);
|
|
|
|
/*
|
|
* Try to scale the receive mbuf cluster size from the MTU. We
|
|
* could also use the VQ size to influence the selected size,
|
|
* but that would only matter for very small queues.
|
|
*/
|
|
if (vtnet_modern(sc)) {
|
|
MPASS(sc->vtnet_hdr_size == sizeof(struct virtio_net_hdr_v1));
|
|
framesz = sizeof(struct virtio_net_hdr_v1);
|
|
} else
|
|
framesz = sizeof(struct vtnet_rx_header);
|
|
framesz += sizeof(struct ether_vlan_header) + mtu;
|
|
|
|
if (framesz <= MCLBYTES)
|
|
return (MCLBYTES);
|
|
else if (framesz <= MJUMPAGESIZE)
|
|
return (MJUMPAGESIZE);
|
|
else if (framesz <= MJUM9BYTES)
|
|
return (MJUM9BYTES);
|
|
|
|
/* Sane default; avoid 16KB clusters. */
|
|
return (MCLBYTES);
|
|
}
|
|
|
|
static int
|
|
vtnet_ioctl_mtu(struct vtnet_softc *sc, u_int mtu)
|
|
{
|
|
struct ifnet *ifp;
|
|
int clustersz;
|
|
|
|
ifp = sc->vtnet_ifp;
|
|
VTNET_CORE_LOCK_ASSERT(sc);
|
|
|
|
if (ifp->if_mtu == mtu)
|
|
return (0);
|
|
else if (mtu < ETHERMIN || mtu > sc->vtnet_max_mtu)
|
|
return (EINVAL);
|
|
|
|
ifp->if_mtu = mtu;
|
|
clustersz = vtnet_rx_cluster_size(sc, mtu);
|
|
|
|
if (clustersz != sc->vtnet_rx_clustersz &&
|
|
ifp->if_drv_flags & IFF_DRV_RUNNING) {
|
|
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
|
|
vtnet_init_locked(sc, 0);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vtnet_ioctl_ifflags(struct vtnet_softc *sc)
|
|
{
|
|
struct ifnet *ifp;
|
|
int drv_running;
|
|
|
|
ifp = sc->vtnet_ifp;
|
|
drv_running = (ifp->if_drv_flags & IFF_DRV_RUNNING) != 0;
|
|
|
|
VTNET_CORE_LOCK_ASSERT(sc);
|
|
|
|
if ((ifp->if_flags & IFF_UP) == 0) {
|
|
if (drv_running)
|
|
vtnet_stop(sc);
|
|
goto out;
|
|
}
|
|
|
|
if (!drv_running) {
|
|
vtnet_init_locked(sc, 0);
|
|
goto out;
|
|
}
|
|
|
|
if ((ifp->if_flags ^ sc->vtnet_if_flags) &
|
|
(IFF_PROMISC | IFF_ALLMULTI)) {
|
|
if ((sc->vtnet_flags & VTNET_FLAG_CTRL_RX) == 0)
|
|
return (ENOTSUP);
|
|
vtnet_rx_filter(sc);
|
|
}
|
|
|
|
out:
|
|
sc->vtnet_if_flags = ifp->if_flags;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vtnet_ioctl_multi(struct vtnet_softc *sc)
|
|
{
|
|
struct ifnet *ifp;
|
|
|
|
ifp = sc->vtnet_ifp;
|
|
|
|
VTNET_CORE_LOCK_ASSERT(sc);
|
|
|
|
if (sc->vtnet_flags & VTNET_FLAG_CTRL_RX &&
|
|
ifp->if_drv_flags & IFF_DRV_RUNNING)
|
|
vtnet_rx_filter_mac(sc);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vtnet_ioctl_ifcap(struct vtnet_softc *sc, struct ifreq *ifr)
|
|
{
|
|
struct ifnet *ifp;
|
|
int mask, reinit, update;
|
|
|
|
ifp = sc->vtnet_ifp;
|
|
mask = (ifr->ifr_reqcap & ifp->if_capabilities) ^ ifp->if_capenable;
|
|
reinit = update = 0;
|
|
|
|
VTNET_CORE_LOCK_ASSERT(sc);
|
|
|
|
if (mask & IFCAP_TXCSUM)
|
|
ifp->if_capenable ^= IFCAP_TXCSUM;
|
|
if (mask & IFCAP_TXCSUM_IPV6)
|
|
ifp->if_capenable ^= IFCAP_TXCSUM_IPV6;
|
|
if (mask & IFCAP_TSO4)
|
|
ifp->if_capenable ^= IFCAP_TSO4;
|
|
if (mask & IFCAP_TSO6)
|
|
ifp->if_capenable ^= IFCAP_TSO6;
|
|
|
|
if (mask & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6 | IFCAP_LRO)) {
|
|
/*
|
|
* These Rx features require the negotiated features to
|
|
* be updated. Avoid a full reinit if possible.
|
|
*/
|
|
if (sc->vtnet_features & VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)
|
|
update = 1;
|
|
else
|
|
reinit = 1;
|
|
|
|
/* BMV: Avoid needless renegotiation for just software LRO. */
|
|
if ((mask & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6 | IFCAP_LRO)) ==
|
|
IFCAP_LRO && vtnet_software_lro(sc))
|
|
reinit = update = 0;
|
|
|
|
if (mask & IFCAP_RXCSUM)
|
|
ifp->if_capenable ^= IFCAP_RXCSUM;
|
|
if (mask & IFCAP_RXCSUM_IPV6)
|
|
ifp->if_capenable ^= IFCAP_RXCSUM_IPV6;
|
|
if (mask & IFCAP_LRO)
|
|
ifp->if_capenable ^= IFCAP_LRO;
|
|
|
|
/*
|
|
* VirtIO does not distinguish between IPv4 and IPv6 checksums
|
|
* so treat them as a pair. Guest TSO (LRO) requires receive
|
|
* checksums.
|
|
*/
|
|
if (ifp->if_capenable & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6)) {
|
|
ifp->if_capenable |= IFCAP_RXCSUM;
|
|
#ifdef notyet
|
|
ifp->if_capenable |= IFCAP_RXCSUM_IPV6;
|
|
#endif
|
|
} else
|
|
ifp->if_capenable &=
|
|
~(IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6 | IFCAP_LRO);
|
|
}
|
|
|
|
if (mask & IFCAP_VLAN_HWFILTER) {
|
|
/* These Rx features require renegotiation. */
|
|
reinit = 1;
|
|
|
|
if (mask & IFCAP_VLAN_HWFILTER)
|
|
ifp->if_capenable ^= IFCAP_VLAN_HWFILTER;
|
|
}
|
|
|
|
if (mask & IFCAP_VLAN_HWTSO)
|
|
ifp->if_capenable ^= IFCAP_VLAN_HWTSO;
|
|
if (mask & IFCAP_VLAN_HWTAGGING)
|
|
ifp->if_capenable ^= IFCAP_VLAN_HWTAGGING;
|
|
|
|
if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
|
|
if (reinit) {
|
|
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
|
|
vtnet_init_locked(sc, 0);
|
|
} else if (update)
|
|
vtnet_update_rx_offloads(sc);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vtnet_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct ifreq *ifr;
|
|
int error;
|
|
|
|
sc = ifp->if_softc;
|
|
ifr = (struct ifreq *) data;
|
|
error = 0;
|
|
|
|
switch (cmd) {
|
|
case SIOCSIFMTU:
|
|
VTNET_CORE_LOCK(sc);
|
|
error = vtnet_ioctl_mtu(sc, ifr->ifr_mtu);
|
|
VTNET_CORE_UNLOCK(sc);
|
|
break;
|
|
|
|
case SIOCSIFFLAGS:
|
|
VTNET_CORE_LOCK(sc);
|
|
error = vtnet_ioctl_ifflags(sc);
|
|
VTNET_CORE_UNLOCK(sc);
|
|
break;
|
|
|
|
case SIOCADDMULTI:
|
|
case SIOCDELMULTI:
|
|
VTNET_CORE_LOCK(sc);
|
|
error = vtnet_ioctl_multi(sc);
|
|
VTNET_CORE_UNLOCK(sc);
|
|
break;
|
|
|
|
case SIOCSIFMEDIA:
|
|
case SIOCGIFMEDIA:
|
|
error = ifmedia_ioctl(ifp, ifr, &sc->vtnet_media, cmd);
|
|
break;
|
|
|
|
case SIOCSIFCAP:
|
|
VTNET_CORE_LOCK(sc);
|
|
error = vtnet_ioctl_ifcap(sc, ifr);
|
|
VTNET_CORE_UNLOCK(sc);
|
|
VLAN_CAPABILITIES(ifp);
|
|
break;
|
|
|
|
default:
|
|
error = ether_ioctl(ifp, cmd, data);
|
|
break;
|
|
}
|
|
|
|
VTNET_CORE_LOCK_ASSERT_NOTOWNED(sc);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
vtnet_rxq_populate(struct vtnet_rxq *rxq)
|
|
{
|
|
struct virtqueue *vq;
|
|
int nbufs, error;
|
|
|
|
#ifdef DEV_NETMAP
|
|
error = vtnet_netmap_rxq_populate(rxq);
|
|
if (error >= 0)
|
|
return (error);
|
|
#endif /* DEV_NETMAP */
|
|
|
|
vq = rxq->vtnrx_vq;
|
|
error = ENOSPC;
|
|
|
|
for (nbufs = 0; !virtqueue_full(vq); nbufs++) {
|
|
error = vtnet_rxq_new_buf(rxq);
|
|
if (error)
|
|
break;
|
|
}
|
|
|
|
if (nbufs > 0) {
|
|
virtqueue_notify(vq);
|
|
/*
|
|
* EMSGSIZE signifies the virtqueue did not have enough
|
|
* entries available to hold the last mbuf. This is not
|
|
* an error.
|
|
*/
|
|
if (error == EMSGSIZE)
|
|
error = 0;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
vtnet_rxq_free_mbufs(struct vtnet_rxq *rxq)
|
|
{
|
|
struct virtqueue *vq;
|
|
struct mbuf *m;
|
|
int last;
|
|
#ifdef DEV_NETMAP
|
|
struct netmap_kring *kring = netmap_kring_on(NA(rxq->vtnrx_sc->vtnet_ifp),
|
|
rxq->vtnrx_id, NR_RX);
|
|
#else /* !DEV_NETMAP */
|
|
void *kring = NULL;
|
|
#endif /* !DEV_NETMAP */
|
|
|
|
vq = rxq->vtnrx_vq;
|
|
last = 0;
|
|
|
|
while ((m = virtqueue_drain(vq, &last)) != NULL) {
|
|
if (kring == NULL)
|
|
m_freem(m);
|
|
}
|
|
|
|
KASSERT(virtqueue_empty(vq),
|
|
("%s: mbufs remaining in rx queue %p", __func__, rxq));
|
|
}
|
|
|
|
static struct mbuf *
|
|
vtnet_rx_alloc_buf(struct vtnet_softc *sc, int nbufs, struct mbuf **m_tailp)
|
|
{
|
|
struct mbuf *m_head, *m_tail, *m;
|
|
int i, size;
|
|
|
|
m_head = NULL;
|
|
size = sc->vtnet_rx_clustersz;
|
|
|
|
KASSERT(nbufs == 1 || sc->vtnet_flags & VTNET_FLAG_LRO_NOMRG,
|
|
("%s: mbuf %d chain requested without LRO_NOMRG", __func__, nbufs));
|
|
|
|
for (i = 0; i < nbufs; i++) {
|
|
m = m_getjcl(M_NOWAIT, MT_DATA, i == 0 ? M_PKTHDR : 0, size);
|
|
if (m == NULL) {
|
|
sc->vtnet_stats.mbuf_alloc_failed++;
|
|
m_freem(m_head);
|
|
return (NULL);
|
|
}
|
|
|
|
m->m_len = size;
|
|
if (m_head != NULL) {
|
|
m_tail->m_next = m;
|
|
m_tail = m;
|
|
} else
|
|
m_head = m_tail = m;
|
|
}
|
|
|
|
if (m_tailp != NULL)
|
|
*m_tailp = m_tail;
|
|
|
|
return (m_head);
|
|
}
|
|
|
|
/*
|
|
* Slow path for when LRO without mergeable buffers is negotiated.
|
|
*/
|
|
static int
|
|
vtnet_rxq_replace_lro_nomrg_buf(struct vtnet_rxq *rxq, struct mbuf *m0,
|
|
int len0)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct mbuf *m, *m_prev, *m_new, *m_tail;
|
|
int len, clustersz, nreplace, error;
|
|
|
|
sc = rxq->vtnrx_sc;
|
|
clustersz = sc->vtnet_rx_clustersz;
|
|
|
|
m_prev = NULL;
|
|
m_tail = NULL;
|
|
nreplace = 0;
|
|
|
|
m = m0;
|
|
len = len0;
|
|
|
|
/*
|
|
* Since these mbuf chains are so large, avoid allocating a complete
|
|
* replacement when the received frame did not consume the entire
|
|
* chain. Unused mbufs are moved to the tail of the replacement mbuf.
|
|
*/
|
|
while (len > 0) {
|
|
if (m == NULL) {
|
|
sc->vtnet_stats.rx_frame_too_large++;
|
|
return (EMSGSIZE);
|
|
}
|
|
|
|
/*
|
|
* Every mbuf should have the expected cluster size since that
|
|
* is also used to allocate the replacements.
|
|
*/
|
|
KASSERT(m->m_len == clustersz,
|
|
("%s: mbuf size %d not expected cluster size %d", __func__,
|
|
m->m_len, clustersz));
|
|
|
|
m->m_len = MIN(m->m_len, len);
|
|
len -= m->m_len;
|
|
|
|
m_prev = m;
|
|
m = m->m_next;
|
|
nreplace++;
|
|
}
|
|
|
|
KASSERT(nreplace > 0 && nreplace <= sc->vtnet_rx_nmbufs,
|
|
("%s: invalid replacement mbuf count %d max %d", __func__,
|
|
nreplace, sc->vtnet_rx_nmbufs));
|
|
|
|
m_new = vtnet_rx_alloc_buf(sc, nreplace, &m_tail);
|
|
if (m_new == NULL) {
|
|
m_prev->m_len = clustersz;
|
|
return (ENOBUFS);
|
|
}
|
|
|
|
/*
|
|
* Move any unused mbufs from the received mbuf chain onto the
|
|
* end of the replacement chain.
|
|
*/
|
|
if (m_prev->m_next != NULL) {
|
|
m_tail->m_next = m_prev->m_next;
|
|
m_prev->m_next = NULL;
|
|
}
|
|
|
|
error = vtnet_rxq_enqueue_buf(rxq, m_new);
|
|
if (error) {
|
|
/*
|
|
* The replacement is suppose to be an copy of the one
|
|
* dequeued so this is a very unexpected error.
|
|
*
|
|
* Restore the m0 chain to the original state if it was
|
|
* modified so we can then discard it.
|
|
*/
|
|
if (m_tail->m_next != NULL) {
|
|
m_prev->m_next = m_tail->m_next;
|
|
m_tail->m_next = NULL;
|
|
}
|
|
m_prev->m_len = clustersz;
|
|
sc->vtnet_stats.rx_enq_replacement_failed++;
|
|
m_freem(m_new);
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
vtnet_rxq_replace_buf(struct vtnet_rxq *rxq, struct mbuf *m, int len)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct mbuf *m_new;
|
|
int error;
|
|
|
|
sc = rxq->vtnrx_sc;
|
|
|
|
if (sc->vtnet_flags & VTNET_FLAG_LRO_NOMRG)
|
|
return (vtnet_rxq_replace_lro_nomrg_buf(rxq, m, len));
|
|
|
|
MPASS(m->m_next == NULL);
|
|
if (m->m_len < len)
|
|
return (EMSGSIZE);
|
|
|
|
m_new = vtnet_rx_alloc_buf(sc, 1, NULL);
|
|
if (m_new == NULL)
|
|
return (ENOBUFS);
|
|
|
|
error = vtnet_rxq_enqueue_buf(rxq, m_new);
|
|
if (error) {
|
|
sc->vtnet_stats.rx_enq_replacement_failed++;
|
|
m_freem(m_new);
|
|
} else
|
|
m->m_len = len;
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
vtnet_rxq_enqueue_buf(struct vtnet_rxq *rxq, struct mbuf *m)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct sglist *sg;
|
|
int header_inlined, error;
|
|
|
|
sc = rxq->vtnrx_sc;
|
|
sg = rxq->vtnrx_sg;
|
|
|
|
KASSERT(m->m_next == NULL || sc->vtnet_flags & VTNET_FLAG_LRO_NOMRG,
|
|
("%s: mbuf chain without LRO_NOMRG", __func__));
|
|
VTNET_RXQ_LOCK_ASSERT(rxq);
|
|
|
|
sglist_reset(sg);
|
|
header_inlined = vtnet_modern(sc) ||
|
|
(sc->vtnet_flags & VTNET_FLAG_MRG_RXBUFS) != 0; /* TODO: ANY_LAYOUT */
|
|
|
|
if (header_inlined)
|
|
error = sglist_append_mbuf(sg, m);
|
|
else {
|
|
struct vtnet_rx_header *rxhdr =
|
|
mtod(m, struct vtnet_rx_header *);
|
|
MPASS(sc->vtnet_hdr_size == sizeof(struct virtio_net_hdr));
|
|
|
|
/* Append the header and remaining mbuf data. */
|
|
error = sglist_append(sg, &rxhdr->vrh_hdr, sc->vtnet_hdr_size);
|
|
if (error)
|
|
return (error);
|
|
error = sglist_append(sg, &rxhdr[1],
|
|
m->m_len - sizeof(struct vtnet_rx_header));
|
|
if (error)
|
|
return (error);
|
|
|
|
if (m->m_next != NULL)
|
|
error = sglist_append_mbuf(sg, m->m_next);
|
|
}
|
|
|
|
if (error)
|
|
return (error);
|
|
|
|
return (virtqueue_enqueue(rxq->vtnrx_vq, m, sg, 0, sg->sg_nseg));
|
|
}
|
|
|
|
static int
|
|
vtnet_rxq_new_buf(struct vtnet_rxq *rxq)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct mbuf *m;
|
|
int error;
|
|
|
|
sc = rxq->vtnrx_sc;
|
|
|
|
m = vtnet_rx_alloc_buf(sc, sc->vtnet_rx_nmbufs, NULL);
|
|
if (m == NULL)
|
|
return (ENOBUFS);
|
|
|
|
error = vtnet_rxq_enqueue_buf(rxq, m);
|
|
if (error)
|
|
m_freem(m);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
vtnet_rxq_csum_needs_csum(struct vtnet_rxq *rxq, struct mbuf *m, uint16_t etype,
|
|
int hoff, struct virtio_net_hdr *hdr)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
int error;
|
|
|
|
sc = rxq->vtnrx_sc;
|
|
|
|
/*
|
|
* NEEDS_CSUM corresponds to Linux's CHECKSUM_PARTIAL, but FreeBSD does
|
|
* not have an analogous CSUM flag. The checksum has been validated,
|
|
* but is incomplete (TCP/UDP pseudo header).
|
|
*
|
|
* The packet is likely from another VM on the same host that itself
|
|
* performed checksum offloading so Tx/Rx is basically a memcpy and
|
|
* the checksum has little value.
|
|
*
|
|
* Default to receiving the packet as-is for performance reasons, but
|
|
* this can cause issues if the packet is to be forwarded because it
|
|
* does not contain a valid checksum. This patch may be helpful:
|
|
* https://reviews.freebsd.org/D6611. In the meantime, have the driver
|
|
* compute the checksum if requested.
|
|
*
|
|
* BMV: Need to add an CSUM_PARTIAL flag?
|
|
*/
|
|
if ((sc->vtnet_flags & VTNET_FLAG_FIXUP_NEEDS_CSUM) == 0) {
|
|
error = vtnet_rxq_csum_data_valid(rxq, m, etype, hoff, hdr);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Compute the checksum in the driver so the packet will contain a
|
|
* valid checksum. The checksum is at csum_offset from csum_start.
|
|
*/
|
|
switch (etype) {
|
|
#if defined(INET) || defined(INET6)
|
|
case ETHERTYPE_IP:
|
|
case ETHERTYPE_IPV6: {
|
|
int csum_off, csum_end;
|
|
uint16_t csum;
|
|
|
|
csum_off = hdr->csum_start + hdr->csum_offset;
|
|
csum_end = csum_off + sizeof(uint16_t);
|
|
|
|
/* Assume checksum will be in the first mbuf. */
|
|
if (m->m_len < csum_end || m->m_pkthdr.len < csum_end)
|
|
return (1);
|
|
|
|
/*
|
|
* Like in_delayed_cksum()/in6_delayed_cksum(), compute the
|
|
* checksum and write it at the specified offset. We could
|
|
* try to verify the packet: csum_start should probably
|
|
* correspond to the start of the TCP/UDP header.
|
|
*
|
|
* BMV: Need to properly handle UDP with zero checksum. Is
|
|
* the IPv4 header checksum implicitly validated?
|
|
*/
|
|
csum = in_cksum_skip(m, m->m_pkthdr.len, hdr->csum_start);
|
|
*(uint16_t *)(mtodo(m, csum_off)) = csum;
|
|
m->m_pkthdr.csum_flags |= CSUM_DATA_VALID | CSUM_PSEUDO_HDR;
|
|
m->m_pkthdr.csum_data = 0xFFFF;
|
|
break;
|
|
}
|
|
#endif
|
|
default:
|
|
sc->vtnet_stats.rx_csum_bad_ethtype++;
|
|
return (1);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vtnet_rxq_csum_data_valid(struct vtnet_rxq *rxq, struct mbuf *m,
|
|
uint16_t etype, int hoff, struct virtio_net_hdr *hdr __unused)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
int protocol;
|
|
|
|
sc = rxq->vtnrx_sc;
|
|
|
|
switch (etype) {
|
|
#if defined(INET)
|
|
case ETHERTYPE_IP:
|
|
if (__predict_false(m->m_len < hoff + sizeof(struct ip)))
|
|
protocol = IPPROTO_DONE;
|
|
else {
|
|
struct ip *ip = (struct ip *)(m->m_data + hoff);
|
|
protocol = ip->ip_p;
|
|
}
|
|
break;
|
|
#endif
|
|
#if defined(INET6)
|
|
case ETHERTYPE_IPV6:
|
|
if (__predict_false(m->m_len < hoff + sizeof(struct ip6_hdr))
|
|
|| ip6_lasthdr(m, hoff, IPPROTO_IPV6, &protocol) < 0)
|
|
protocol = IPPROTO_DONE;
|
|
break;
|
|
#endif
|
|
default:
|
|
protocol = IPPROTO_DONE;
|
|
break;
|
|
}
|
|
|
|
switch (protocol) {
|
|
case IPPROTO_TCP:
|
|
case IPPROTO_UDP:
|
|
m->m_pkthdr.csum_flags |= CSUM_DATA_VALID | CSUM_PSEUDO_HDR;
|
|
m->m_pkthdr.csum_data = 0xFFFF;
|
|
break;
|
|
default:
|
|
/*
|
|
* FreeBSD does not support checksum offloading of this
|
|
* protocol. Let the stack re-verify the checksum later
|
|
* if the protocol is supported.
|
|
*/
|
|
#if 0
|
|
if_printf(sc->vtnet_ifp,
|
|
"%s: checksum offload of unsupported protocol "
|
|
"etype=%#x protocol=%d csum_start=%d csum_offset=%d\n",
|
|
__func__, etype, protocol, hdr->csum_start,
|
|
hdr->csum_offset);
|
|
#endif
|
|
break;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vtnet_rxq_csum(struct vtnet_rxq *rxq, struct mbuf *m,
|
|
struct virtio_net_hdr *hdr)
|
|
{
|
|
const struct ether_header *eh;
|
|
int hoff;
|
|
uint16_t etype;
|
|
|
|
eh = mtod(m, const struct ether_header *);
|
|
etype = ntohs(eh->ether_type);
|
|
if (etype == ETHERTYPE_VLAN) {
|
|
/* TODO BMV: Handle QinQ. */
|
|
const struct ether_vlan_header *evh =
|
|
mtod(m, const struct ether_vlan_header *);
|
|
etype = ntohs(evh->evl_proto);
|
|
hoff = sizeof(struct ether_vlan_header);
|
|
} else
|
|
hoff = sizeof(struct ether_header);
|
|
|
|
if (hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM)
|
|
return (vtnet_rxq_csum_needs_csum(rxq, m, etype, hoff, hdr));
|
|
else /* VIRTIO_NET_HDR_F_DATA_VALID */
|
|
return (vtnet_rxq_csum_data_valid(rxq, m, etype, hoff, hdr));
|
|
}
|
|
|
|
static void
|
|
vtnet_rxq_discard_merged_bufs(struct vtnet_rxq *rxq, int nbufs)
|
|
{
|
|
struct mbuf *m;
|
|
|
|
while (--nbufs > 0) {
|
|
m = virtqueue_dequeue(rxq->vtnrx_vq, NULL);
|
|
if (m == NULL)
|
|
break;
|
|
vtnet_rxq_discard_buf(rxq, m);
|
|
}
|
|
}
|
|
|
|
static void
|
|
vtnet_rxq_discard_buf(struct vtnet_rxq *rxq, struct mbuf *m)
|
|
{
|
|
int error;
|
|
|
|
/*
|
|
* Requeue the discarded mbuf. This should always be successful
|
|
* since it was just dequeued.
|
|
*/
|
|
error = vtnet_rxq_enqueue_buf(rxq, m);
|
|
KASSERT(error == 0,
|
|
("%s: cannot requeue discarded mbuf %d", __func__, error));
|
|
}
|
|
|
|
static int
|
|
vtnet_rxq_merged_eof(struct vtnet_rxq *rxq, struct mbuf *m_head, int nbufs)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct virtqueue *vq;
|
|
struct mbuf *m_tail;
|
|
|
|
sc = rxq->vtnrx_sc;
|
|
vq = rxq->vtnrx_vq;
|
|
m_tail = m_head;
|
|
|
|
while (--nbufs > 0) {
|
|
struct mbuf *m;
|
|
uint32_t len;
|
|
|
|
m = virtqueue_dequeue(vq, &len);
|
|
if (m == NULL) {
|
|
rxq->vtnrx_stats.vrxs_ierrors++;
|
|
goto fail;
|
|
}
|
|
|
|
if (vtnet_rxq_new_buf(rxq) != 0) {
|
|
rxq->vtnrx_stats.vrxs_iqdrops++;
|
|
vtnet_rxq_discard_buf(rxq, m);
|
|
if (nbufs > 1)
|
|
vtnet_rxq_discard_merged_bufs(rxq, nbufs);
|
|
goto fail;
|
|
}
|
|
|
|
if (m->m_len < len)
|
|
len = m->m_len;
|
|
|
|
m->m_len = len;
|
|
m->m_flags &= ~M_PKTHDR;
|
|
|
|
m_head->m_pkthdr.len += len;
|
|
m_tail->m_next = m;
|
|
m_tail = m;
|
|
}
|
|
|
|
return (0);
|
|
|
|
fail:
|
|
sc->vtnet_stats.rx_mergeable_failed++;
|
|
m_freem(m_head);
|
|
|
|
return (1);
|
|
}
|
|
|
|
#if defined(INET) || defined(INET6)
|
|
static int
|
|
vtnet_lro_rx(struct vtnet_rxq *rxq, struct mbuf *m)
|
|
{
|
|
struct lro_ctrl *lro;
|
|
|
|
lro = &rxq->vtnrx_lro;
|
|
|
|
if (lro->lro_mbuf_max != 0) {
|
|
tcp_lro_queue_mbuf(lro, m);
|
|
return (0);
|
|
}
|
|
|
|
return (tcp_lro_rx(lro, m, 0));
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
vtnet_rxq_input(struct vtnet_rxq *rxq, struct mbuf *m,
|
|
struct virtio_net_hdr *hdr)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct ifnet *ifp;
|
|
|
|
sc = rxq->vtnrx_sc;
|
|
ifp = sc->vtnet_ifp;
|
|
|
|
if (ifp->if_capenable & IFCAP_VLAN_HWTAGGING) {
|
|
struct ether_header *eh = mtod(m, struct ether_header *);
|
|
if (eh->ether_type == htons(ETHERTYPE_VLAN)) {
|
|
vtnet_vlan_tag_remove(m);
|
|
/*
|
|
* With the 802.1Q header removed, update the
|
|
* checksum starting location accordingly.
|
|
*/
|
|
if (hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM)
|
|
hdr->csum_start -= ETHER_VLAN_ENCAP_LEN;
|
|
}
|
|
}
|
|
|
|
m->m_pkthdr.flowid = rxq->vtnrx_id;
|
|
M_HASHTYPE_SET(m, M_HASHTYPE_OPAQUE);
|
|
|
|
if (hdr->flags &
|
|
(VIRTIO_NET_HDR_F_NEEDS_CSUM | VIRTIO_NET_HDR_F_DATA_VALID)) {
|
|
if (vtnet_rxq_csum(rxq, m, hdr) == 0)
|
|
rxq->vtnrx_stats.vrxs_csum++;
|
|
else
|
|
rxq->vtnrx_stats.vrxs_csum_failed++;
|
|
}
|
|
|
|
if (hdr->gso_size != 0) {
|
|
switch (hdr->gso_type & ~VIRTIO_NET_HDR_GSO_ECN) {
|
|
case VIRTIO_NET_HDR_GSO_TCPV4:
|
|
case VIRTIO_NET_HDR_GSO_TCPV6:
|
|
m->m_pkthdr.lro_nsegs =
|
|
howmany(m->m_pkthdr.len, hdr->gso_size);
|
|
rxq->vtnrx_stats.vrxs_host_lro++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
rxq->vtnrx_stats.vrxs_ipackets++;
|
|
rxq->vtnrx_stats.vrxs_ibytes += m->m_pkthdr.len;
|
|
|
|
#if defined(INET) || defined(INET6)
|
|
if (vtnet_software_lro(sc) && ifp->if_capenable & IFCAP_LRO) {
|
|
if (vtnet_lro_rx(rxq, m) == 0)
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
(*ifp->if_input)(ifp, m);
|
|
}
|
|
|
|
static int
|
|
vtnet_rxq_eof(struct vtnet_rxq *rxq)
|
|
{
|
|
struct virtio_net_hdr lhdr, *hdr;
|
|
struct vtnet_softc *sc;
|
|
struct ifnet *ifp;
|
|
struct virtqueue *vq;
|
|
int deq, count;
|
|
|
|
sc = rxq->vtnrx_sc;
|
|
vq = rxq->vtnrx_vq;
|
|
ifp = sc->vtnet_ifp;
|
|
deq = 0;
|
|
count = sc->vtnet_rx_process_limit;
|
|
|
|
VTNET_RXQ_LOCK_ASSERT(rxq);
|
|
|
|
while (count-- > 0) {
|
|
struct mbuf *m;
|
|
uint32_t len, nbufs, adjsz;
|
|
|
|
m = virtqueue_dequeue(vq, &len);
|
|
if (m == NULL)
|
|
break;
|
|
deq++;
|
|
|
|
if (len < sc->vtnet_hdr_size + ETHER_HDR_LEN) {
|
|
rxq->vtnrx_stats.vrxs_ierrors++;
|
|
vtnet_rxq_discard_buf(rxq, m);
|
|
continue;
|
|
}
|
|
|
|
if (sc->vtnet_flags & VTNET_FLAG_MRG_RXBUFS) {
|
|
struct virtio_net_hdr_mrg_rxbuf *mhdr =
|
|
mtod(m, struct virtio_net_hdr_mrg_rxbuf *);
|
|
nbufs = vtnet_htog16(sc, mhdr->num_buffers);
|
|
adjsz = sizeof(struct virtio_net_hdr_mrg_rxbuf);
|
|
} else if (vtnet_modern(sc)) {
|
|
nbufs = 1; /* num_buffers is always 1 */
|
|
adjsz = sizeof(struct virtio_net_hdr_v1);
|
|
} else {
|
|
nbufs = 1;
|
|
adjsz = sizeof(struct vtnet_rx_header);
|
|
/*
|
|
* Account for our gap between the header and start of
|
|
* data to keep the segments separated.
|
|
*/
|
|
len += VTNET_RX_HEADER_PAD;
|
|
}
|
|
|
|
if (vtnet_rxq_replace_buf(rxq, m, len) != 0) {
|
|
rxq->vtnrx_stats.vrxs_iqdrops++;
|
|
vtnet_rxq_discard_buf(rxq, m);
|
|
if (nbufs > 1)
|
|
vtnet_rxq_discard_merged_bufs(rxq, nbufs);
|
|
continue;
|
|
}
|
|
|
|
m->m_pkthdr.len = len;
|
|
m->m_pkthdr.rcvif = ifp;
|
|
m->m_pkthdr.csum_flags = 0;
|
|
|
|
if (nbufs > 1) {
|
|
/* Dequeue the rest of chain. */
|
|
if (vtnet_rxq_merged_eof(rxq, m, nbufs) != 0)
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Save an endian swapped version of the header prior to it
|
|
* being stripped. The header is always at the start of the
|
|
* mbuf data. num_buffers was already saved (and not needed)
|
|
* so use the standard header.
|
|
*/
|
|
hdr = mtod(m, struct virtio_net_hdr *);
|
|
lhdr.flags = hdr->flags;
|
|
lhdr.gso_type = hdr->gso_type;
|
|
lhdr.hdr_len = vtnet_htog16(sc, hdr->hdr_len);
|
|
lhdr.gso_size = vtnet_htog16(sc, hdr->gso_size);
|
|
lhdr.csum_start = vtnet_htog16(sc, hdr->csum_start);
|
|
lhdr.csum_offset = vtnet_htog16(sc, hdr->csum_offset);
|
|
m_adj(m, adjsz);
|
|
|
|
if (PFIL_HOOKED_IN(sc->vtnet_pfil)) {
|
|
pfil_return_t pfil;
|
|
|
|
pfil = pfil_run_hooks(sc->vtnet_pfil, &m, ifp, PFIL_IN,
|
|
NULL);
|
|
switch (pfil) {
|
|
case PFIL_REALLOCED:
|
|
m = pfil_mem2mbuf(m->m_data);
|
|
break;
|
|
case PFIL_DROPPED:
|
|
case PFIL_CONSUMED:
|
|
continue;
|
|
default:
|
|
KASSERT(pfil == PFIL_PASS,
|
|
("Filter returned %d!", pfil));
|
|
}
|
|
}
|
|
|
|
vtnet_rxq_input(rxq, m, &lhdr);
|
|
}
|
|
|
|
if (deq > 0) {
|
|
#if defined(INET) || defined(INET6)
|
|
if (vtnet_software_lro(sc))
|
|
tcp_lro_flush_all(&rxq->vtnrx_lro);
|
|
#endif
|
|
virtqueue_notify(vq);
|
|
}
|
|
|
|
return (count > 0 ? 0 : EAGAIN);
|
|
}
|
|
|
|
static void
|
|
vtnet_rx_vq_process(struct vtnet_rxq *rxq, int tries)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct ifnet *ifp;
|
|
u_int more;
|
|
#ifdef DEV_NETMAP
|
|
int nmirq;
|
|
#endif /* DEV_NETMAP */
|
|
|
|
sc = rxq->vtnrx_sc;
|
|
ifp = sc->vtnet_ifp;
|
|
|
|
if (__predict_false(rxq->vtnrx_id >= sc->vtnet_act_vq_pairs)) {
|
|
/*
|
|
* Ignore this interrupt. Either this is a spurious interrupt
|
|
* or multiqueue without per-VQ MSIX so every queue needs to
|
|
* be polled (a brain dead configuration we could try harder
|
|
* to avoid).
|
|
*/
|
|
vtnet_rxq_disable_intr(rxq);
|
|
return;
|
|
}
|
|
|
|
VTNET_RXQ_LOCK(rxq);
|
|
|
|
#ifdef DEV_NETMAP
|
|
/*
|
|
* We call netmap_rx_irq() under lock to prevent concurrent calls.
|
|
* This is not necessary to serialize the access to the RX vq, but
|
|
* rather to avoid races that may happen if this interface is
|
|
* attached to a VALE switch, which would cause received packets
|
|
* to stall in the RX queue (nm_kr_tryget() could find the kring
|
|
* busy when called from netmap_bwrap_intr_notify()).
|
|
*/
|
|
nmirq = netmap_rx_irq(ifp, rxq->vtnrx_id, &more);
|
|
if (nmirq != NM_IRQ_PASS) {
|
|
VTNET_RXQ_UNLOCK(rxq);
|
|
if (nmirq == NM_IRQ_RESCHED) {
|
|
taskqueue_enqueue(rxq->vtnrx_tq, &rxq->vtnrx_intrtask);
|
|
}
|
|
return;
|
|
}
|
|
#endif /* DEV_NETMAP */
|
|
|
|
again:
|
|
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
|
|
VTNET_RXQ_UNLOCK(rxq);
|
|
return;
|
|
}
|
|
|
|
more = vtnet_rxq_eof(rxq);
|
|
if (more || vtnet_rxq_enable_intr(rxq) != 0) {
|
|
if (!more)
|
|
vtnet_rxq_disable_intr(rxq);
|
|
/*
|
|
* This is an occasional condition or race (when !more),
|
|
* so retry a few times before scheduling the taskqueue.
|
|
*/
|
|
if (tries-- > 0)
|
|
goto again;
|
|
|
|
rxq->vtnrx_stats.vrxs_rescheduled++;
|
|
VTNET_RXQ_UNLOCK(rxq);
|
|
taskqueue_enqueue(rxq->vtnrx_tq, &rxq->vtnrx_intrtask);
|
|
} else
|
|
VTNET_RXQ_UNLOCK(rxq);
|
|
}
|
|
|
|
static void
|
|
vtnet_rx_vq_intr(void *xrxq)
|
|
{
|
|
struct vtnet_rxq *rxq;
|
|
|
|
rxq = xrxq;
|
|
vtnet_rx_vq_process(rxq, VTNET_INTR_DISABLE_RETRIES);
|
|
}
|
|
|
|
static void
|
|
vtnet_rxq_tq_intr(void *xrxq, int pending __unused)
|
|
{
|
|
struct vtnet_rxq *rxq;
|
|
|
|
rxq = xrxq;
|
|
vtnet_rx_vq_process(rxq, 0);
|
|
}
|
|
|
|
static int
|
|
vtnet_txq_intr_threshold(struct vtnet_txq *txq)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
int threshold;
|
|
|
|
sc = txq->vtntx_sc;
|
|
|
|
/*
|
|
* The Tx interrupt is disabled until the queue free count falls
|
|
* below our threshold. Completed frames are drained from the Tx
|
|
* virtqueue before transmitting new frames and in the watchdog
|
|
* callout, so the frequency of Tx interrupts is greatly reduced,
|
|
* at the cost of not freeing mbufs as quickly as they otherwise
|
|
* would be.
|
|
*/
|
|
threshold = virtqueue_size(txq->vtntx_vq) / 4;
|
|
|
|
/*
|
|
* Without indirect descriptors, leave enough room for the most
|
|
* segments we handle.
|
|
*/
|
|
if ((sc->vtnet_flags & VTNET_FLAG_INDIRECT) == 0 &&
|
|
threshold < sc->vtnet_tx_nsegs)
|
|
threshold = sc->vtnet_tx_nsegs;
|
|
|
|
return (threshold);
|
|
}
|
|
|
|
static int
|
|
vtnet_txq_below_threshold(struct vtnet_txq *txq)
|
|
{
|
|
struct virtqueue *vq;
|
|
|
|
vq = txq->vtntx_vq;
|
|
|
|
return (virtqueue_nfree(vq) <= txq->vtntx_intr_threshold);
|
|
}
|
|
|
|
static int
|
|
vtnet_txq_notify(struct vtnet_txq *txq)
|
|
{
|
|
struct virtqueue *vq;
|
|
|
|
vq = txq->vtntx_vq;
|
|
|
|
txq->vtntx_watchdog = VTNET_TX_TIMEOUT;
|
|
virtqueue_notify(vq);
|
|
|
|
if (vtnet_txq_enable_intr(txq) == 0)
|
|
return (0);
|
|
|
|
/*
|
|
* Drain frames that were completed since last checked. If this
|
|
* causes the queue to go above the threshold, the caller should
|
|
* continue transmitting.
|
|
*/
|
|
if (vtnet_txq_eof(txq) != 0 && vtnet_txq_below_threshold(txq) == 0) {
|
|
virtqueue_disable_intr(vq);
|
|
return (1);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
vtnet_txq_free_mbufs(struct vtnet_txq *txq)
|
|
{
|
|
struct virtqueue *vq;
|
|
struct vtnet_tx_header *txhdr;
|
|
int last;
|
|
#ifdef DEV_NETMAP
|
|
struct netmap_kring *kring = netmap_kring_on(NA(txq->vtntx_sc->vtnet_ifp),
|
|
txq->vtntx_id, NR_TX);
|
|
#else /* !DEV_NETMAP */
|
|
void *kring = NULL;
|
|
#endif /* !DEV_NETMAP */
|
|
|
|
vq = txq->vtntx_vq;
|
|
last = 0;
|
|
|
|
while ((txhdr = virtqueue_drain(vq, &last)) != NULL) {
|
|
if (kring == NULL) {
|
|
m_freem(txhdr->vth_mbuf);
|
|
uma_zfree(vtnet_tx_header_zone, txhdr);
|
|
}
|
|
}
|
|
|
|
KASSERT(virtqueue_empty(vq),
|
|
("%s: mbufs remaining in tx queue %p", __func__, txq));
|
|
}
|
|
|
|
/*
|
|
* BMV: This can go away once we finally have offsets in the mbuf header.
|
|
*/
|
|
static int
|
|
vtnet_txq_offload_ctx(struct vtnet_txq *txq, struct mbuf *m, int *etype,
|
|
int *proto, int *start)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct ether_vlan_header *evh;
|
|
int offset;
|
|
|
|
sc = txq->vtntx_sc;
|
|
|
|
evh = mtod(m, struct ether_vlan_header *);
|
|
if (evh->evl_encap_proto == htons(ETHERTYPE_VLAN)) {
|
|
/* BMV: We should handle nested VLAN tags too. */
|
|
*etype = ntohs(evh->evl_proto);
|
|
offset = sizeof(struct ether_vlan_header);
|
|
} else {
|
|
*etype = ntohs(evh->evl_encap_proto);
|
|
offset = sizeof(struct ether_header);
|
|
}
|
|
|
|
switch (*etype) {
|
|
#if defined(INET)
|
|
case ETHERTYPE_IP: {
|
|
struct ip *ip, iphdr;
|
|
if (__predict_false(m->m_len < offset + sizeof(struct ip))) {
|
|
m_copydata(m, offset, sizeof(struct ip),
|
|
(caddr_t) &iphdr);
|
|
ip = &iphdr;
|
|
} else
|
|
ip = (struct ip *)(m->m_data + offset);
|
|
*proto = ip->ip_p;
|
|
*start = offset + (ip->ip_hl << 2);
|
|
break;
|
|
}
|
|
#endif
|
|
#if defined(INET6)
|
|
case ETHERTYPE_IPV6:
|
|
*proto = -1;
|
|
*start = ip6_lasthdr(m, offset, IPPROTO_IPV6, proto);
|
|
/* Assert the network stack sent us a valid packet. */
|
|
KASSERT(*start > offset,
|
|
("%s: mbuf %p start %d offset %d proto %d", __func__, m,
|
|
*start, offset, *proto));
|
|
break;
|
|
#endif
|
|
default:
|
|
sc->vtnet_stats.tx_csum_unknown_ethtype++;
|
|
return (EINVAL);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vtnet_txq_offload_tso(struct vtnet_txq *txq, struct mbuf *m, int eth_type,
|
|
int offset, struct virtio_net_hdr *hdr)
|
|
{
|
|
static struct timeval lastecn;
|
|
static int curecn;
|
|
struct vtnet_softc *sc;
|
|
struct tcphdr *tcp, tcphdr;
|
|
|
|
sc = txq->vtntx_sc;
|
|
|
|
if (__predict_false(m->m_len < offset + sizeof(struct tcphdr))) {
|
|
m_copydata(m, offset, sizeof(struct tcphdr), (caddr_t) &tcphdr);
|
|
tcp = &tcphdr;
|
|
} else
|
|
tcp = (struct tcphdr *)(m->m_data + offset);
|
|
|
|
hdr->hdr_len = vtnet_gtoh16(sc, offset + (tcp->th_off << 2));
|
|
hdr->gso_size = vtnet_gtoh16(sc, m->m_pkthdr.tso_segsz);
|
|
hdr->gso_type = eth_type == ETHERTYPE_IP ? VIRTIO_NET_HDR_GSO_TCPV4 :
|
|
VIRTIO_NET_HDR_GSO_TCPV6;
|
|
|
|
if (__predict_false(tcp->th_flags & TH_CWR)) {
|
|
/*
|
|
* Drop if VIRTIO_NET_F_HOST_ECN was not negotiated. In
|
|
* FreeBSD, ECN support is not on a per-interface basis,
|
|
* but globally via the net.inet.tcp.ecn.enable sysctl
|
|
* knob. The default is off.
|
|
*/
|
|
if ((sc->vtnet_flags & VTNET_FLAG_TSO_ECN) == 0) {
|
|
if (ppsratecheck(&lastecn, &curecn, 1))
|
|
if_printf(sc->vtnet_ifp,
|
|
"TSO with ECN not negotiated with host\n");
|
|
return (ENOTSUP);
|
|
}
|
|
hdr->gso_type |= VIRTIO_NET_HDR_GSO_ECN;
|
|
}
|
|
|
|
txq->vtntx_stats.vtxs_tso++;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static struct mbuf *
|
|
vtnet_txq_offload(struct vtnet_txq *txq, struct mbuf *m,
|
|
struct virtio_net_hdr *hdr)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
int flags, etype, csum_start, proto, error;
|
|
|
|
sc = txq->vtntx_sc;
|
|
flags = m->m_pkthdr.csum_flags;
|
|
|
|
error = vtnet_txq_offload_ctx(txq, m, &etype, &proto, &csum_start);
|
|
if (error)
|
|
goto drop;
|
|
|
|
if (flags & (VTNET_CSUM_OFFLOAD | VTNET_CSUM_OFFLOAD_IPV6)) {
|
|
/* Sanity check the parsed mbuf matches the offload flags. */
|
|
if (__predict_false((flags & VTNET_CSUM_OFFLOAD &&
|
|
etype != ETHERTYPE_IP) || (flags & VTNET_CSUM_OFFLOAD_IPV6
|
|
&& etype != ETHERTYPE_IPV6))) {
|
|
sc->vtnet_stats.tx_csum_proto_mismatch++;
|
|
goto drop;
|
|
}
|
|
|
|
hdr->flags |= VIRTIO_NET_HDR_F_NEEDS_CSUM;
|
|
hdr->csum_start = vtnet_gtoh16(sc, csum_start);
|
|
hdr->csum_offset = vtnet_gtoh16(sc, m->m_pkthdr.csum_data);
|
|
txq->vtntx_stats.vtxs_csum++;
|
|
}
|
|
|
|
if (flags & (CSUM_IP_TSO | CSUM_IP6_TSO)) {
|
|
/*
|
|
* Sanity check the parsed mbuf IP protocol is TCP, and
|
|
* VirtIO TSO reqires the checksum offloading above.
|
|
*/
|
|
if (__predict_false(proto != IPPROTO_TCP)) {
|
|
sc->vtnet_stats.tx_tso_not_tcp++;
|
|
goto drop;
|
|
} else if (__predict_false((hdr->flags &
|
|
VIRTIO_NET_HDR_F_NEEDS_CSUM) == 0)) {
|
|
sc->vtnet_stats.tx_tso_without_csum++;
|
|
goto drop;
|
|
}
|
|
|
|
error = vtnet_txq_offload_tso(txq, m, etype, csum_start, hdr);
|
|
if (error)
|
|
goto drop;
|
|
}
|
|
|
|
return (m);
|
|
|
|
drop:
|
|
m_freem(m);
|
|
return (NULL);
|
|
}
|
|
|
|
static int
|
|
vtnet_txq_enqueue_buf(struct vtnet_txq *txq, struct mbuf **m_head,
|
|
struct vtnet_tx_header *txhdr)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct virtqueue *vq;
|
|
struct sglist *sg;
|
|
struct mbuf *m;
|
|
int error;
|
|
|
|
sc = txq->vtntx_sc;
|
|
vq = txq->vtntx_vq;
|
|
sg = txq->vtntx_sg;
|
|
m = *m_head;
|
|
|
|
sglist_reset(sg);
|
|
error = sglist_append(sg, &txhdr->vth_uhdr, sc->vtnet_hdr_size);
|
|
if (error != 0 || sg->sg_nseg != 1) {
|
|
KASSERT(0, ("%s: cannot add header to sglist error %d nseg %d",
|
|
__func__, error, sg->sg_nseg));
|
|
goto fail;
|
|
}
|
|
|
|
error = sglist_append_mbuf(sg, m);
|
|
if (error) {
|
|
m = m_defrag(m, M_NOWAIT);
|
|
if (m == NULL)
|
|
goto fail;
|
|
|
|
*m_head = m;
|
|
sc->vtnet_stats.tx_defragged++;
|
|
|
|
error = sglist_append_mbuf(sg, m);
|
|
if (error)
|
|
goto fail;
|
|
}
|
|
|
|
txhdr->vth_mbuf = m;
|
|
error = virtqueue_enqueue(vq, txhdr, sg, sg->sg_nseg, 0);
|
|
|
|
return (error);
|
|
|
|
fail:
|
|
sc->vtnet_stats.tx_defrag_failed++;
|
|
m_freem(*m_head);
|
|
*m_head = NULL;
|
|
|
|
return (ENOBUFS);
|
|
}
|
|
|
|
static int
|
|
vtnet_txq_encap(struct vtnet_txq *txq, struct mbuf **m_head, int flags)
|
|
{
|
|
struct vtnet_tx_header *txhdr;
|
|
struct virtio_net_hdr *hdr;
|
|
struct mbuf *m;
|
|
int error;
|
|
|
|
m = *m_head;
|
|
M_ASSERTPKTHDR(m);
|
|
|
|
txhdr = uma_zalloc(vtnet_tx_header_zone, flags | M_ZERO);
|
|
if (txhdr == NULL) {
|
|
m_freem(m);
|
|
*m_head = NULL;
|
|
return (ENOMEM);
|
|
}
|
|
|
|
/*
|
|
* Always use the non-mergeable header, regardless if mergable headers
|
|
* were negotiated, because for transmit num_buffers is always zero.
|
|
* The vtnet_hdr_size is used to enqueue the right header size segment.
|
|
*/
|
|
hdr = &txhdr->vth_uhdr.hdr;
|
|
|
|
if (m->m_flags & M_VLANTAG) {
|
|
m = ether_vlanencap(m, m->m_pkthdr.ether_vtag);
|
|
if ((*m_head = m) == NULL) {
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
m->m_flags &= ~M_VLANTAG;
|
|
}
|
|
|
|
if (m->m_pkthdr.csum_flags & VTNET_CSUM_ALL_OFFLOAD) {
|
|
m = vtnet_txq_offload(txq, m, hdr);
|
|
if ((*m_head = m) == NULL) {
|
|
error = ENOBUFS;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
error = vtnet_txq_enqueue_buf(txq, m_head, txhdr);
|
|
fail:
|
|
if (error)
|
|
uma_zfree(vtnet_tx_header_zone, txhdr);
|
|
|
|
return (error);
|
|
}
|
|
|
|
#ifdef VTNET_LEGACY_TX
|
|
|
|
static void
|
|
vtnet_start_locked(struct vtnet_txq *txq, struct ifnet *ifp)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct virtqueue *vq;
|
|
struct mbuf *m0;
|
|
int tries, enq;
|
|
|
|
sc = txq->vtntx_sc;
|
|
vq = txq->vtntx_vq;
|
|
tries = 0;
|
|
|
|
VTNET_TXQ_LOCK_ASSERT(txq);
|
|
|
|
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
|
|
sc->vtnet_link_active == 0)
|
|
return;
|
|
|
|
vtnet_txq_eof(txq);
|
|
|
|
again:
|
|
enq = 0;
|
|
|
|
while (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) {
|
|
if (virtqueue_full(vq))
|
|
break;
|
|
|
|
IFQ_DRV_DEQUEUE(&ifp->if_snd, m0);
|
|
if (m0 == NULL)
|
|
break;
|
|
|
|
if (vtnet_txq_encap(txq, &m0, M_NOWAIT) != 0) {
|
|
if (m0 != NULL)
|
|
IFQ_DRV_PREPEND(&ifp->if_snd, m0);
|
|
break;
|
|
}
|
|
|
|
enq++;
|
|
ETHER_BPF_MTAP(ifp, m0);
|
|
}
|
|
|
|
if (enq > 0 && vtnet_txq_notify(txq) != 0) {
|
|
if (tries++ < VTNET_NOTIFY_RETRIES)
|
|
goto again;
|
|
|
|
txq->vtntx_stats.vtxs_rescheduled++;
|
|
taskqueue_enqueue(txq->vtntx_tq, &txq->vtntx_intrtask);
|
|
}
|
|
}
|
|
|
|
static void
|
|
vtnet_start(struct ifnet *ifp)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct vtnet_txq *txq;
|
|
|
|
sc = ifp->if_softc;
|
|
txq = &sc->vtnet_txqs[0];
|
|
|
|
VTNET_TXQ_LOCK(txq);
|
|
vtnet_start_locked(txq, ifp);
|
|
VTNET_TXQ_UNLOCK(txq);
|
|
}
|
|
|
|
#else /* !VTNET_LEGACY_TX */
|
|
|
|
static int
|
|
vtnet_txq_mq_start_locked(struct vtnet_txq *txq, struct mbuf *m)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct virtqueue *vq;
|
|
struct buf_ring *br;
|
|
struct ifnet *ifp;
|
|
int enq, tries, error;
|
|
|
|
sc = txq->vtntx_sc;
|
|
vq = txq->vtntx_vq;
|
|
br = txq->vtntx_br;
|
|
ifp = sc->vtnet_ifp;
|
|
tries = 0;
|
|
error = 0;
|
|
|
|
VTNET_TXQ_LOCK_ASSERT(txq);
|
|
|
|
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
|
|
sc->vtnet_link_active == 0) {
|
|
if (m != NULL)
|
|
error = drbr_enqueue(ifp, br, m);
|
|
return (error);
|
|
}
|
|
|
|
if (m != NULL) {
|
|
error = drbr_enqueue(ifp, br, m);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
|
|
vtnet_txq_eof(txq);
|
|
|
|
again:
|
|
enq = 0;
|
|
|
|
while ((m = drbr_peek(ifp, br)) != NULL) {
|
|
if (virtqueue_full(vq)) {
|
|
drbr_putback(ifp, br, m);
|
|
break;
|
|
}
|
|
|
|
if (vtnet_txq_encap(txq, &m, M_NOWAIT) != 0) {
|
|
if (m != NULL)
|
|
drbr_putback(ifp, br, m);
|
|
else
|
|
drbr_advance(ifp, br);
|
|
break;
|
|
}
|
|
drbr_advance(ifp, br);
|
|
|
|
enq++;
|
|
ETHER_BPF_MTAP(ifp, m);
|
|
}
|
|
|
|
if (enq > 0 && vtnet_txq_notify(txq) != 0) {
|
|
if (tries++ < VTNET_NOTIFY_RETRIES)
|
|
goto again;
|
|
|
|
txq->vtntx_stats.vtxs_rescheduled++;
|
|
taskqueue_enqueue(txq->vtntx_tq, &txq->vtntx_intrtask);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vtnet_txq_mq_start(struct ifnet *ifp, struct mbuf *m)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct vtnet_txq *txq;
|
|
int i, npairs, error;
|
|
|
|
sc = ifp->if_softc;
|
|
npairs = sc->vtnet_act_vq_pairs;
|
|
|
|
if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE)
|
|
i = m->m_pkthdr.flowid % npairs;
|
|
else
|
|
i = curcpu % npairs;
|
|
|
|
txq = &sc->vtnet_txqs[i];
|
|
|
|
if (VTNET_TXQ_TRYLOCK(txq) != 0) {
|
|
error = vtnet_txq_mq_start_locked(txq, m);
|
|
VTNET_TXQ_UNLOCK(txq);
|
|
} else {
|
|
error = drbr_enqueue(ifp, txq->vtntx_br, m);
|
|
taskqueue_enqueue(txq->vtntx_tq, &txq->vtntx_defrtask);
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
vtnet_txq_tq_deferred(void *xtxq, int pending __unused)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct vtnet_txq *txq;
|
|
|
|
txq = xtxq;
|
|
sc = txq->vtntx_sc;
|
|
|
|
VTNET_TXQ_LOCK(txq);
|
|
if (!drbr_empty(sc->vtnet_ifp, txq->vtntx_br))
|
|
vtnet_txq_mq_start_locked(txq, NULL);
|
|
VTNET_TXQ_UNLOCK(txq);
|
|
}
|
|
|
|
#endif /* VTNET_LEGACY_TX */
|
|
|
|
static void
|
|
vtnet_txq_start(struct vtnet_txq *txq)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct ifnet *ifp;
|
|
|
|
sc = txq->vtntx_sc;
|
|
ifp = sc->vtnet_ifp;
|
|
|
|
#ifdef VTNET_LEGACY_TX
|
|
if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
|
|
vtnet_start_locked(txq, ifp);
|
|
#else
|
|
if (!drbr_empty(ifp, txq->vtntx_br))
|
|
vtnet_txq_mq_start_locked(txq, NULL);
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
vtnet_txq_tq_intr(void *xtxq, int pending __unused)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct vtnet_txq *txq;
|
|
struct ifnet *ifp;
|
|
|
|
txq = xtxq;
|
|
sc = txq->vtntx_sc;
|
|
ifp = sc->vtnet_ifp;
|
|
|
|
VTNET_TXQ_LOCK(txq);
|
|
|
|
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
|
|
VTNET_TXQ_UNLOCK(txq);
|
|
return;
|
|
}
|
|
|
|
vtnet_txq_eof(txq);
|
|
vtnet_txq_start(txq);
|
|
|
|
VTNET_TXQ_UNLOCK(txq);
|
|
}
|
|
|
|
static int
|
|
vtnet_txq_eof(struct vtnet_txq *txq)
|
|
{
|
|
struct virtqueue *vq;
|
|
struct vtnet_tx_header *txhdr;
|
|
struct mbuf *m;
|
|
int deq;
|
|
|
|
vq = txq->vtntx_vq;
|
|
deq = 0;
|
|
VTNET_TXQ_LOCK_ASSERT(txq);
|
|
|
|
while ((txhdr = virtqueue_dequeue(vq, NULL)) != NULL) {
|
|
m = txhdr->vth_mbuf;
|
|
deq++;
|
|
|
|
txq->vtntx_stats.vtxs_opackets++;
|
|
txq->vtntx_stats.vtxs_obytes += m->m_pkthdr.len;
|
|
if (m->m_flags & M_MCAST)
|
|
txq->vtntx_stats.vtxs_omcasts++;
|
|
|
|
m_freem(m);
|
|
uma_zfree(vtnet_tx_header_zone, txhdr);
|
|
}
|
|
|
|
if (virtqueue_empty(vq))
|
|
txq->vtntx_watchdog = 0;
|
|
|
|
return (deq);
|
|
}
|
|
|
|
static void
|
|
vtnet_tx_vq_intr(void *xtxq)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct vtnet_txq *txq;
|
|
struct ifnet *ifp;
|
|
|
|
txq = xtxq;
|
|
sc = txq->vtntx_sc;
|
|
ifp = sc->vtnet_ifp;
|
|
|
|
if (__predict_false(txq->vtntx_id >= sc->vtnet_act_vq_pairs)) {
|
|
/*
|
|
* Ignore this interrupt. Either this is a spurious interrupt
|
|
* or multiqueue without per-VQ MSIX so every queue needs to
|
|
* be polled (a brain dead configuration we could try harder
|
|
* to avoid).
|
|
*/
|
|
vtnet_txq_disable_intr(txq);
|
|
return;
|
|
}
|
|
|
|
#ifdef DEV_NETMAP
|
|
if (netmap_tx_irq(ifp, txq->vtntx_id) != NM_IRQ_PASS)
|
|
return;
|
|
#endif /* DEV_NETMAP */
|
|
|
|
VTNET_TXQ_LOCK(txq);
|
|
|
|
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
|
|
VTNET_TXQ_UNLOCK(txq);
|
|
return;
|
|
}
|
|
|
|
vtnet_txq_eof(txq);
|
|
vtnet_txq_start(txq);
|
|
|
|
VTNET_TXQ_UNLOCK(txq);
|
|
}
|
|
|
|
static void
|
|
vtnet_tx_start_all(struct vtnet_softc *sc)
|
|
{
|
|
struct vtnet_txq *txq;
|
|
int i;
|
|
|
|
VTNET_CORE_LOCK_ASSERT(sc);
|
|
|
|
for (i = 0; i < sc->vtnet_act_vq_pairs; i++) {
|
|
txq = &sc->vtnet_txqs[i];
|
|
|
|
VTNET_TXQ_LOCK(txq);
|
|
vtnet_txq_start(txq);
|
|
VTNET_TXQ_UNLOCK(txq);
|
|
}
|
|
}
|
|
|
|
#ifndef VTNET_LEGACY_TX
|
|
static void
|
|
vtnet_qflush(struct ifnet *ifp)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct vtnet_txq *txq;
|
|
struct mbuf *m;
|
|
int i;
|
|
|
|
sc = ifp->if_softc;
|
|
|
|
for (i = 0; i < sc->vtnet_act_vq_pairs; i++) {
|
|
txq = &sc->vtnet_txqs[i];
|
|
|
|
VTNET_TXQ_LOCK(txq);
|
|
while ((m = buf_ring_dequeue_sc(txq->vtntx_br)) != NULL)
|
|
m_freem(m);
|
|
VTNET_TXQ_UNLOCK(txq);
|
|
}
|
|
|
|
if_qflush(ifp);
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
vtnet_watchdog(struct vtnet_txq *txq)
|
|
{
|
|
struct ifnet *ifp;
|
|
|
|
ifp = txq->vtntx_sc->vtnet_ifp;
|
|
|
|
VTNET_TXQ_LOCK(txq);
|
|
if (txq->vtntx_watchdog == 1) {
|
|
/*
|
|
* Only drain completed frames if the watchdog is about to
|
|
* expire. If any frames were drained, there may be enough
|
|
* free descriptors now available to transmit queued frames.
|
|
* In that case, the timer will immediately be decremented
|
|
* below, but the timeout is generous enough that should not
|
|
* be a problem.
|
|
*/
|
|
if (vtnet_txq_eof(txq) != 0)
|
|
vtnet_txq_start(txq);
|
|
}
|
|
|
|
if (txq->vtntx_watchdog == 0 || --txq->vtntx_watchdog) {
|
|
VTNET_TXQ_UNLOCK(txq);
|
|
return (0);
|
|
}
|
|
VTNET_TXQ_UNLOCK(txq);
|
|
|
|
if_printf(ifp, "watchdog timeout on queue %d\n", txq->vtntx_id);
|
|
return (1);
|
|
}
|
|
|
|
static void
|
|
vtnet_accum_stats(struct vtnet_softc *sc, struct vtnet_rxq_stats *rxacc,
|
|
struct vtnet_txq_stats *txacc)
|
|
{
|
|
|
|
bzero(rxacc, sizeof(struct vtnet_rxq_stats));
|
|
bzero(txacc, sizeof(struct vtnet_txq_stats));
|
|
|
|
for (int i = 0; i < sc->vtnet_max_vq_pairs; i++) {
|
|
struct vtnet_rxq_stats *rxst;
|
|
struct vtnet_txq_stats *txst;
|
|
|
|
rxst = &sc->vtnet_rxqs[i].vtnrx_stats;
|
|
rxacc->vrxs_ipackets += rxst->vrxs_ipackets;
|
|
rxacc->vrxs_ibytes += rxst->vrxs_ibytes;
|
|
rxacc->vrxs_iqdrops += rxst->vrxs_iqdrops;
|
|
rxacc->vrxs_csum += rxst->vrxs_csum;
|
|
rxacc->vrxs_csum_failed += rxst->vrxs_csum_failed;
|
|
rxacc->vrxs_rescheduled += rxst->vrxs_rescheduled;
|
|
|
|
txst = &sc->vtnet_txqs[i].vtntx_stats;
|
|
txacc->vtxs_opackets += txst->vtxs_opackets;
|
|
txacc->vtxs_obytes += txst->vtxs_obytes;
|
|
txacc->vtxs_csum += txst->vtxs_csum;
|
|
txacc->vtxs_tso += txst->vtxs_tso;
|
|
txacc->vtxs_rescheduled += txst->vtxs_rescheduled;
|
|
}
|
|
}
|
|
|
|
static uint64_t
|
|
vtnet_get_counter(if_t ifp, ift_counter cnt)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct vtnet_rxq_stats rxaccum;
|
|
struct vtnet_txq_stats txaccum;
|
|
|
|
sc = if_getsoftc(ifp);
|
|
vtnet_accum_stats(sc, &rxaccum, &txaccum);
|
|
|
|
switch (cnt) {
|
|
case IFCOUNTER_IPACKETS:
|
|
return (rxaccum.vrxs_ipackets);
|
|
case IFCOUNTER_IQDROPS:
|
|
return (rxaccum.vrxs_iqdrops);
|
|
case IFCOUNTER_IERRORS:
|
|
return (rxaccum.vrxs_ierrors);
|
|
case IFCOUNTER_OPACKETS:
|
|
return (txaccum.vtxs_opackets);
|
|
#ifndef VTNET_LEGACY_TX
|
|
case IFCOUNTER_OBYTES:
|
|
return (txaccum.vtxs_obytes);
|
|
case IFCOUNTER_OMCASTS:
|
|
return (txaccum.vtxs_omcasts);
|
|
#endif
|
|
default:
|
|
return (if_get_counter_default(ifp, cnt));
|
|
}
|
|
}
|
|
|
|
static void
|
|
vtnet_tick(void *xsc)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct ifnet *ifp;
|
|
int i, timedout;
|
|
|
|
sc = xsc;
|
|
ifp = sc->vtnet_ifp;
|
|
timedout = 0;
|
|
|
|
VTNET_CORE_LOCK_ASSERT(sc);
|
|
|
|
for (i = 0; i < sc->vtnet_act_vq_pairs; i++)
|
|
timedout |= vtnet_watchdog(&sc->vtnet_txqs[i]);
|
|
|
|
if (timedout != 0) {
|
|
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
|
|
vtnet_init_locked(sc, 0);
|
|
} else
|
|
callout_schedule(&sc->vtnet_tick_ch, hz);
|
|
}
|
|
|
|
static void
|
|
vtnet_start_taskqueues(struct vtnet_softc *sc)
|
|
{
|
|
device_t dev;
|
|
struct vtnet_rxq *rxq;
|
|
struct vtnet_txq *txq;
|
|
int i, error;
|
|
|
|
dev = sc->vtnet_dev;
|
|
|
|
/*
|
|
* Errors here are very difficult to recover from - we cannot
|
|
* easily fail because, if this is during boot, we will hang
|
|
* when freeing any successfully started taskqueues because
|
|
* the scheduler isn't up yet.
|
|
*
|
|
* Most drivers just ignore the return value - it only fails
|
|
* with ENOMEM so an error is not likely.
|
|
*/
|
|
for (i = 0; i < sc->vtnet_req_vq_pairs; i++) {
|
|
rxq = &sc->vtnet_rxqs[i];
|
|
error = taskqueue_start_threads(&rxq->vtnrx_tq, 1, PI_NET,
|
|
"%s rxq %d", device_get_nameunit(dev), rxq->vtnrx_id);
|
|
if (error) {
|
|
device_printf(dev, "failed to start rx taskq %d\n",
|
|
rxq->vtnrx_id);
|
|
}
|
|
|
|
txq = &sc->vtnet_txqs[i];
|
|
error = taskqueue_start_threads(&txq->vtntx_tq, 1, PI_NET,
|
|
"%s txq %d", device_get_nameunit(dev), txq->vtntx_id);
|
|
if (error) {
|
|
device_printf(dev, "failed to start tx taskq %d\n",
|
|
txq->vtntx_id);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
vtnet_free_taskqueues(struct vtnet_softc *sc)
|
|
{
|
|
struct vtnet_rxq *rxq;
|
|
struct vtnet_txq *txq;
|
|
int i;
|
|
|
|
for (i = 0; i < sc->vtnet_max_vq_pairs; i++) {
|
|
rxq = &sc->vtnet_rxqs[i];
|
|
if (rxq->vtnrx_tq != NULL) {
|
|
taskqueue_free(rxq->vtnrx_tq);
|
|
rxq->vtnrx_tq = NULL;
|
|
}
|
|
|
|
txq = &sc->vtnet_txqs[i];
|
|
if (txq->vtntx_tq != NULL) {
|
|
taskqueue_free(txq->vtntx_tq);
|
|
txq->vtntx_tq = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
vtnet_drain_taskqueues(struct vtnet_softc *sc)
|
|
{
|
|
struct vtnet_rxq *rxq;
|
|
struct vtnet_txq *txq;
|
|
int i;
|
|
|
|
for (i = 0; i < sc->vtnet_max_vq_pairs; i++) {
|
|
rxq = &sc->vtnet_rxqs[i];
|
|
if (rxq->vtnrx_tq != NULL)
|
|
taskqueue_drain(rxq->vtnrx_tq, &rxq->vtnrx_intrtask);
|
|
|
|
txq = &sc->vtnet_txqs[i];
|
|
if (txq->vtntx_tq != NULL) {
|
|
taskqueue_drain(txq->vtntx_tq, &txq->vtntx_intrtask);
|
|
#ifndef VTNET_LEGACY_TX
|
|
taskqueue_drain(txq->vtntx_tq, &txq->vtntx_defrtask);
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
vtnet_drain_rxtx_queues(struct vtnet_softc *sc)
|
|
{
|
|
struct vtnet_rxq *rxq;
|
|
struct vtnet_txq *txq;
|
|
int i;
|
|
|
|
for (i = 0; i < sc->vtnet_max_vq_pairs; i++) {
|
|
rxq = &sc->vtnet_rxqs[i];
|
|
vtnet_rxq_free_mbufs(rxq);
|
|
|
|
txq = &sc->vtnet_txqs[i];
|
|
vtnet_txq_free_mbufs(txq);
|
|
}
|
|
}
|
|
|
|
static void
|
|
vtnet_stop_rendezvous(struct vtnet_softc *sc)
|
|
{
|
|
struct vtnet_rxq *rxq;
|
|
struct vtnet_txq *txq;
|
|
int i;
|
|
|
|
VTNET_CORE_LOCK_ASSERT(sc);
|
|
|
|
/*
|
|
* Lock and unlock the per-queue mutex so we known the stop
|
|
* state is visible. Doing only the active queues should be
|
|
* sufficient, but it does not cost much extra to do all the
|
|
* queues.
|
|
*/
|
|
for (i = 0; i < sc->vtnet_max_vq_pairs; i++) {
|
|
rxq = &sc->vtnet_rxqs[i];
|
|
VTNET_RXQ_LOCK(rxq);
|
|
VTNET_RXQ_UNLOCK(rxq);
|
|
|
|
txq = &sc->vtnet_txqs[i];
|
|
VTNET_TXQ_LOCK(txq);
|
|
VTNET_TXQ_UNLOCK(txq);
|
|
}
|
|
}
|
|
|
|
static void
|
|
vtnet_stop(struct vtnet_softc *sc)
|
|
{
|
|
device_t dev;
|
|
struct ifnet *ifp;
|
|
|
|
dev = sc->vtnet_dev;
|
|
ifp = sc->vtnet_ifp;
|
|
|
|
VTNET_CORE_LOCK_ASSERT(sc);
|
|
|
|
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
|
|
sc->vtnet_link_active = 0;
|
|
callout_stop(&sc->vtnet_tick_ch);
|
|
|
|
/* Only advisory. */
|
|
vtnet_disable_interrupts(sc);
|
|
|
|
#ifdef DEV_NETMAP
|
|
/* Stop any pending txsync/rxsync and disable them. */
|
|
netmap_disable_all_rings(ifp);
|
|
#endif /* DEV_NETMAP */
|
|
|
|
/*
|
|
* Stop the host adapter. This resets it to the pre-initialized
|
|
* state. It will not generate any interrupts until after it is
|
|
* reinitialized.
|
|
*/
|
|
virtio_stop(dev);
|
|
vtnet_stop_rendezvous(sc);
|
|
|
|
vtnet_drain_rxtx_queues(sc);
|
|
sc->vtnet_act_vq_pairs = 1;
|
|
}
|
|
|
|
static int
|
|
vtnet_virtio_reinit(struct vtnet_softc *sc)
|
|
{
|
|
device_t dev;
|
|
struct ifnet *ifp;
|
|
uint64_t features;
|
|
int error;
|
|
|
|
dev = sc->vtnet_dev;
|
|
ifp = sc->vtnet_ifp;
|
|
features = sc->vtnet_negotiated_features;
|
|
|
|
/*
|
|
* Re-negotiate with the host, removing any disabled receive
|
|
* features. Transmit features are disabled only on our side
|
|
* via if_capenable and if_hwassist.
|
|
*/
|
|
|
|
if ((ifp->if_capenable & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6)) == 0)
|
|
features &= ~(VIRTIO_NET_F_GUEST_CSUM | VTNET_LRO_FEATURES);
|
|
|
|
if ((ifp->if_capenable & IFCAP_LRO) == 0)
|
|
features &= ~VTNET_LRO_FEATURES;
|
|
|
|
if ((ifp->if_capenable & IFCAP_VLAN_HWFILTER) == 0)
|
|
features &= ~VIRTIO_NET_F_CTRL_VLAN;
|
|
|
|
error = virtio_reinit(dev, features);
|
|
if (error) {
|
|
device_printf(dev, "virtio reinit error %d\n", error);
|
|
return (error);
|
|
}
|
|
|
|
sc->vtnet_features = features;
|
|
virtio_reinit_complete(dev);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
vtnet_init_rx_filters(struct vtnet_softc *sc)
|
|
{
|
|
struct ifnet *ifp;
|
|
|
|
ifp = sc->vtnet_ifp;
|
|
|
|
if (sc->vtnet_flags & VTNET_FLAG_CTRL_RX) {
|
|
vtnet_rx_filter(sc);
|
|
vtnet_rx_filter_mac(sc);
|
|
}
|
|
|
|
if (ifp->if_capenable & IFCAP_VLAN_HWFILTER)
|
|
vtnet_rx_filter_vlan(sc);
|
|
}
|
|
|
|
static int
|
|
vtnet_init_rx_queues(struct vtnet_softc *sc)
|
|
{
|
|
device_t dev;
|
|
struct ifnet *ifp;
|
|
struct vtnet_rxq *rxq;
|
|
int i, clustersz, error;
|
|
|
|
dev = sc->vtnet_dev;
|
|
ifp = sc->vtnet_ifp;
|
|
|
|
clustersz = vtnet_rx_cluster_size(sc, ifp->if_mtu);
|
|
sc->vtnet_rx_clustersz = clustersz;
|
|
|
|
if (sc->vtnet_flags & VTNET_FLAG_LRO_NOMRG) {
|
|
sc->vtnet_rx_nmbufs = howmany(sizeof(struct vtnet_rx_header) +
|
|
VTNET_MAX_RX_SIZE, clustersz);
|
|
KASSERT(sc->vtnet_rx_nmbufs < sc->vtnet_rx_nsegs,
|
|
("%s: too many rx mbufs %d for %d segments", __func__,
|
|
sc->vtnet_rx_nmbufs, sc->vtnet_rx_nsegs));
|
|
} else
|
|
sc->vtnet_rx_nmbufs = 1;
|
|
|
|
for (i = 0; i < sc->vtnet_act_vq_pairs; i++) {
|
|
rxq = &sc->vtnet_rxqs[i];
|
|
|
|
/* Hold the lock to satisfy asserts. */
|
|
VTNET_RXQ_LOCK(rxq);
|
|
error = vtnet_rxq_populate(rxq);
|
|
VTNET_RXQ_UNLOCK(rxq);
|
|
|
|
if (error) {
|
|
device_printf(dev, "cannot populate Rx queue %d\n", i);
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vtnet_init_tx_queues(struct vtnet_softc *sc)
|
|
{
|
|
struct vtnet_txq *txq;
|
|
int i;
|
|
|
|
for (i = 0; i < sc->vtnet_act_vq_pairs; i++) {
|
|
txq = &sc->vtnet_txqs[i];
|
|
txq->vtntx_watchdog = 0;
|
|
txq->vtntx_intr_threshold = vtnet_txq_intr_threshold(txq);
|
|
#ifdef DEV_NETMAP
|
|
netmap_reset(NA(sc->vtnet_ifp), NR_TX, i, 0);
|
|
#endif /* DEV_NETMAP */
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vtnet_init_rxtx_queues(struct vtnet_softc *sc)
|
|
{
|
|
int error;
|
|
|
|
error = vtnet_init_rx_queues(sc);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = vtnet_init_tx_queues(sc);
|
|
if (error)
|
|
return (error);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
vtnet_set_active_vq_pairs(struct vtnet_softc *sc)
|
|
{
|
|
device_t dev;
|
|
int npairs;
|
|
|
|
dev = sc->vtnet_dev;
|
|
|
|
if ((sc->vtnet_flags & VTNET_FLAG_MQ) == 0) {
|
|
sc->vtnet_act_vq_pairs = 1;
|
|
return;
|
|
}
|
|
|
|
npairs = sc->vtnet_req_vq_pairs;
|
|
|
|
if (vtnet_ctrl_mq_cmd(sc, npairs) != 0) {
|
|
device_printf(dev, "cannot set active queue pairs to %d, "
|
|
"falling back to 1 queue pair\n", npairs);
|
|
npairs = 1;
|
|
}
|
|
|
|
sc->vtnet_act_vq_pairs = npairs;
|
|
}
|
|
|
|
static void
|
|
vtnet_update_rx_offloads(struct vtnet_softc *sc)
|
|
{
|
|
struct ifnet *ifp;
|
|
uint64_t features;
|
|
int error;
|
|
|
|
ifp = sc->vtnet_ifp;
|
|
features = sc->vtnet_features;
|
|
|
|
VTNET_CORE_LOCK_ASSERT(sc);
|
|
|
|
if (ifp->if_capabilities & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6)) {
|
|
if (ifp->if_capenable & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6))
|
|
features |= VIRTIO_NET_F_GUEST_CSUM;
|
|
else
|
|
features &= ~VIRTIO_NET_F_GUEST_CSUM;
|
|
}
|
|
|
|
if (ifp->if_capabilities & IFCAP_LRO && !vtnet_software_lro(sc)) {
|
|
if (ifp->if_capenable & IFCAP_LRO)
|
|
features |= VTNET_LRO_FEATURES;
|
|
else
|
|
features &= ~VTNET_LRO_FEATURES;
|
|
}
|
|
|
|
error = vtnet_ctrl_guest_offloads(sc,
|
|
features & (VIRTIO_NET_F_GUEST_CSUM | VIRTIO_NET_F_GUEST_TSO4 |
|
|
VIRTIO_NET_F_GUEST_TSO6 | VIRTIO_NET_F_GUEST_ECN |
|
|
VIRTIO_NET_F_GUEST_UFO));
|
|
if (error) {
|
|
device_printf(sc->vtnet_dev,
|
|
"%s: cannot update Rx features\n", __func__);
|
|
if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
|
|
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
|
|
vtnet_init_locked(sc, 0);
|
|
}
|
|
} else
|
|
sc->vtnet_features = features;
|
|
}
|
|
|
|
static int
|
|
vtnet_reinit(struct vtnet_softc *sc)
|
|
{
|
|
device_t dev;
|
|
struct ifnet *ifp;
|
|
int error;
|
|
|
|
dev = sc->vtnet_dev;
|
|
ifp = sc->vtnet_ifp;
|
|
|
|
bcopy(IF_LLADDR(ifp), sc->vtnet_hwaddr, ETHER_ADDR_LEN);
|
|
|
|
error = vtnet_virtio_reinit(sc);
|
|
if (error)
|
|
return (error);
|
|
|
|
vtnet_set_macaddr(sc);
|
|
vtnet_set_active_vq_pairs(sc);
|
|
|
|
if (sc->vtnet_flags & VTNET_FLAG_CTRL_VQ)
|
|
vtnet_init_rx_filters(sc);
|
|
|
|
ifp->if_hwassist = 0;
|
|
if (ifp->if_capenable & IFCAP_TXCSUM)
|
|
ifp->if_hwassist |= VTNET_CSUM_OFFLOAD;
|
|
if (ifp->if_capenable & IFCAP_TXCSUM_IPV6)
|
|
ifp->if_hwassist |= VTNET_CSUM_OFFLOAD_IPV6;
|
|
if (ifp->if_capenable & IFCAP_TSO4)
|
|
ifp->if_hwassist |= CSUM_IP_TSO;
|
|
if (ifp->if_capenable & IFCAP_TSO6)
|
|
ifp->if_hwassist |= CSUM_IP6_TSO;
|
|
|
|
error = vtnet_init_rxtx_queues(sc);
|
|
if (error)
|
|
return (error);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
vtnet_init_locked(struct vtnet_softc *sc, int init_mode)
|
|
{
|
|
device_t dev;
|
|
struct ifnet *ifp;
|
|
|
|
dev = sc->vtnet_dev;
|
|
ifp = sc->vtnet_ifp;
|
|
|
|
VTNET_CORE_LOCK_ASSERT(sc);
|
|
|
|
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
|
|
return;
|
|
|
|
vtnet_stop(sc);
|
|
|
|
#ifdef DEV_NETMAP
|
|
/* Once stopped we can update the netmap flags, if necessary. */
|
|
switch (init_mode) {
|
|
case VTNET_INIT_NETMAP_ENTER:
|
|
nm_set_native_flags(NA(ifp));
|
|
break;
|
|
case VTNET_INIT_NETMAP_EXIT:
|
|
nm_clear_native_flags(NA(ifp));
|
|
break;
|
|
}
|
|
#endif /* DEV_NETMAP */
|
|
|
|
if (vtnet_reinit(sc) != 0) {
|
|
vtnet_stop(sc);
|
|
return;
|
|
}
|
|
|
|
ifp->if_drv_flags |= IFF_DRV_RUNNING;
|
|
vtnet_update_link_status(sc);
|
|
vtnet_enable_interrupts(sc);
|
|
callout_reset(&sc->vtnet_tick_ch, hz, vtnet_tick, sc);
|
|
|
|
#ifdef DEV_NETMAP
|
|
/* Re-enable txsync/rxsync. */
|
|
netmap_enable_all_rings(ifp);
|
|
#endif /* DEV_NETMAP */
|
|
}
|
|
|
|
static void
|
|
vtnet_init(void *xsc)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
|
|
sc = xsc;
|
|
|
|
VTNET_CORE_LOCK(sc);
|
|
vtnet_init_locked(sc, 0);
|
|
VTNET_CORE_UNLOCK(sc);
|
|
}
|
|
|
|
static void
|
|
vtnet_free_ctrl_vq(struct vtnet_softc *sc)
|
|
{
|
|
|
|
/*
|
|
* The control virtqueue is only polled and therefore it should
|
|
* already be empty.
|
|
*/
|
|
KASSERT(virtqueue_empty(sc->vtnet_ctrl_vq),
|
|
("%s: ctrl vq %p not empty", __func__, sc->vtnet_ctrl_vq));
|
|
}
|
|
|
|
static void
|
|
vtnet_exec_ctrl_cmd(struct vtnet_softc *sc, void *cookie,
|
|
struct sglist *sg, int readable, int writable)
|
|
{
|
|
struct virtqueue *vq;
|
|
|
|
vq = sc->vtnet_ctrl_vq;
|
|
|
|
MPASS(sc->vtnet_flags & VTNET_FLAG_CTRL_VQ);
|
|
VTNET_CORE_LOCK_ASSERT(sc);
|
|
|
|
if (!virtqueue_empty(vq))
|
|
return;
|
|
|
|
/*
|
|
* Poll for the response, but the command is likely completed before
|
|
* returning from the notify.
|
|
*/
|
|
if (virtqueue_enqueue(vq, cookie, sg, readable, writable) == 0) {
|
|
virtqueue_notify(vq);
|
|
virtqueue_poll(vq, NULL);
|
|
}
|
|
}
|
|
|
|
static int
|
|
vtnet_ctrl_mac_cmd(struct vtnet_softc *sc, uint8_t *hwaddr)
|
|
{
|
|
struct sglist_seg segs[3];
|
|
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;
|
|
int error;
|
|
|
|
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);
|
|
s.ack = VIRTIO_NET_ERR;
|
|
|
|
sglist_init(&sg, nitems(segs), segs);
|
|
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)
|
|
vtnet_exec_ctrl_cmd(sc, &s.ack, &sg, sg.sg_nseg - 1, 1);
|
|
|
|
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];
|
|
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;
|
|
int error;
|
|
|
|
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);
|
|
s.ack = VIRTIO_NET_ERR;
|
|
|
|
sglist_init(&sg, nitems(segs), segs);
|
|
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)
|
|
vtnet_exec_ctrl_cmd(sc, &s.ack, &sg, sg.sg_nseg - 1, 1);
|
|
|
|
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];
|
|
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;
|
|
int error;
|
|
|
|
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);
|
|
s.ack = VIRTIO_NET_ERR;
|
|
|
|
sglist_init(&sg, nitems(segs), segs);
|
|
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)
|
|
vtnet_exec_ctrl_cmd(sc, &s.ack, &sg, sg.sg_nseg - 1, 1);
|
|
|
|
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];
|
|
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;
|
|
int error;
|
|
|
|
error = 0;
|
|
MPASS(sc->vtnet_flags & VTNET_FLAG_CTRL_RX);
|
|
|
|
s.hdr.class = VIRTIO_NET_CTRL_RX;
|
|
s.hdr.cmd = cmd;
|
|
s.onoff = on;
|
|
s.ack = VIRTIO_NET_ERR;
|
|
|
|
sglist_init(&sg, nitems(segs), segs);
|
|
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)
|
|
vtnet_exec_ctrl_cmd(sc, &s.ack, &sg, sg.sg_nseg - 1, 1);
|
|
|
|
return (s.ack == VIRTIO_NET_OK ? 0 : EIO);
|
|
}
|
|
|
|
static int
|
|
vtnet_set_promisc(struct vtnet_softc *sc, bool on)
|
|
{
|
|
return (vtnet_ctrl_rx_cmd(sc, VIRTIO_NET_CTRL_RX_PROMISC, on));
|
|
}
|
|
|
|
static int
|
|
vtnet_set_allmulti(struct vtnet_softc *sc, bool on)
|
|
{
|
|
return (vtnet_ctrl_rx_cmd(sc, VIRTIO_NET_CTRL_RX_ALLMULTI, on));
|
|
}
|
|
|
|
static void
|
|
vtnet_rx_filter(struct vtnet_softc *sc)
|
|
{
|
|
device_t dev;
|
|
struct ifnet *ifp;
|
|
|
|
dev = sc->vtnet_dev;
|
|
ifp = sc->vtnet_ifp;
|
|
|
|
VTNET_CORE_LOCK_ASSERT(sc);
|
|
|
|
if (vtnet_set_promisc(sc, ifp->if_flags & IFF_PROMISC) != 0) {
|
|
device_printf(dev, "cannot %s promiscuous mode\n",
|
|
ifp->if_flags & IFF_PROMISC ? "enable" : "disable");
|
|
}
|
|
|
|
if (vtnet_set_allmulti(sc, ifp->if_flags & IFF_ALLMULTI) != 0) {
|
|
device_printf(dev, "cannot %s all-multicast mode\n",
|
|
ifp->if_flags & IFF_ALLMULTI ? "enable" : "disable");
|
|
}
|
|
}
|
|
|
|
static u_int
|
|
vtnet_copy_ifaddr(void *arg, struct sockaddr_dl *sdl, u_int ucnt)
|
|
{
|
|
struct vtnet_softc *sc = arg;
|
|
|
|
if (memcmp(LLADDR(sdl), sc->vtnet_hwaddr, ETHER_ADDR_LEN) == 0)
|
|
return (0);
|
|
|
|
if (ucnt < VTNET_MAX_MAC_ENTRIES)
|
|
bcopy(LLADDR(sdl),
|
|
&sc->vtnet_mac_filter->vmf_unicast.macs[ucnt],
|
|
ETHER_ADDR_LEN);
|
|
|
|
return (1);
|
|
}
|
|
|
|
static u_int
|
|
vtnet_copy_maddr(void *arg, struct sockaddr_dl *sdl, u_int mcnt)
|
|
{
|
|
struct vtnet_mac_filter *filter = arg;
|
|
|
|
if (mcnt < VTNET_MAX_MAC_ENTRIES)
|
|
bcopy(LLADDR(sdl), &filter->vmf_multicast.macs[mcnt],
|
|
ETHER_ADDR_LEN);
|
|
|
|
return (1);
|
|
}
|
|
|
|
static void
|
|
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];
|
|
struct sglist sg;
|
|
struct ifnet *ifp;
|
|
bool promisc, allmulti;
|
|
u_int ucnt, mcnt;
|
|
int error;
|
|
uint8_t ack;
|
|
|
|
ifp = sc->vtnet_ifp;
|
|
filter = sc->vtnet_mac_filter;
|
|
error = 0;
|
|
|
|
MPASS(sc->vtnet_flags & VTNET_FLAG_CTRL_RX);
|
|
VTNET_CORE_LOCK_ASSERT(sc);
|
|
|
|
/* Unicast MAC addresses: */
|
|
ucnt = if_foreach_lladdr(ifp, vtnet_copy_ifaddr, sc);
|
|
promisc = (ucnt > VTNET_MAX_MAC_ENTRIES);
|
|
|
|
if (promisc) {
|
|
ucnt = 0;
|
|
if_printf(ifp, "more than %d MAC addresses assigned, "
|
|
"falling back to promiscuous mode\n",
|
|
VTNET_MAX_MAC_ENTRIES);
|
|
}
|
|
|
|
/* Multicast MAC addresses: */
|
|
mcnt = if_foreach_llmaddr(ifp, vtnet_copy_maddr, filter);
|
|
allmulti = (mcnt > VTNET_MAX_MAC_ENTRIES);
|
|
|
|
if (allmulti) {
|
|
mcnt = 0;
|
|
if_printf(ifp, "more than %d multicast MAC addresses "
|
|
"assigned, falling back to all-multicast mode\n",
|
|
VTNET_MAX_MAC_ENTRIES);
|
|
}
|
|
|
|
if (promisc && allmulti)
|
|
goto out;
|
|
|
|
filter->vmf_unicast.nentries = vtnet_gtoh32(sc, ucnt);
|
|
filter->vmf_multicast.nentries = vtnet_gtoh32(sc, mcnt);
|
|
|
|
hdr.class = VIRTIO_NET_CTRL_MAC;
|
|
hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
|
|
ack = VIRTIO_NET_ERR;
|
|
|
|
sglist_init(&sg, nitems(segs), segs);
|
|
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(&sg, &filter->vmf_multicast,
|
|
sizeof(uint32_t) + mcnt * ETHER_ADDR_LEN);
|
|
error |= sglist_append(&sg, &ack, sizeof(uint8_t));
|
|
MPASS(error == 0 && sg.sg_nseg == nitems(segs));
|
|
|
|
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 != 0 && vtnet_set_promisc(sc, true) != 0)
|
|
if_printf(ifp, "cannot enable promiscuous mode\n");
|
|
if (allmulti != 0 && vtnet_set_allmulti(sc, true) != 0)
|
|
if_printf(ifp, "cannot enable all-multicast mode\n");
|
|
}
|
|
|
|
static int
|
|
vtnet_exec_vlan_filter(struct vtnet_softc *sc, int add, uint16_t tag)
|
|
{
|
|
struct sglist_seg segs[3];
|
|
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;
|
|
int error;
|
|
|
|
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);
|
|
s.ack = VIRTIO_NET_ERR;
|
|
|
|
sglist_init(&sg, nitems(segs), segs);
|
|
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)
|
|
vtnet_exec_ctrl_cmd(sc, &s.ack, &sg, sg.sg_nseg - 1, 1);
|
|
|
|
return (s.ack == VIRTIO_NET_OK ? 0 : EIO);
|
|
}
|
|
|
|
static void
|
|
vtnet_rx_filter_vlan(struct vtnet_softc *sc)
|
|
{
|
|
int i, bit;
|
|
uint32_t w;
|
|
uint16_t tag;
|
|
|
|
MPASS(sc->vtnet_flags & VTNET_FLAG_VLAN_FILTER);
|
|
VTNET_CORE_LOCK_ASSERT(sc);
|
|
|
|
/* Enable the filter for each configured VLAN. */
|
|
for (i = 0; i < VTNET_VLAN_FILTER_NWORDS; i++) {
|
|
w = sc->vtnet_vlan_filter[i];
|
|
|
|
while ((bit = ffs(w) - 1) != -1) {
|
|
w &= ~(1 << bit);
|
|
tag = sizeof(w) * CHAR_BIT * i + bit;
|
|
|
|
if (vtnet_exec_vlan_filter(sc, 1, tag) != 0) {
|
|
device_printf(sc->vtnet_dev,
|
|
"cannot enable VLAN %d filter\n", tag);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
vtnet_update_vlan_filter(struct vtnet_softc *sc, int add, uint16_t tag)
|
|
{
|
|
struct ifnet *ifp;
|
|
int idx, bit;
|
|
|
|
ifp = sc->vtnet_ifp;
|
|
idx = (tag >> 5) & 0x7F;
|
|
bit = tag & 0x1F;
|
|
|
|
if (tag == 0 || tag > 4095)
|
|
return;
|
|
|
|
VTNET_CORE_LOCK(sc);
|
|
|
|
if (add)
|
|
sc->vtnet_vlan_filter[idx] |= (1 << bit);
|
|
else
|
|
sc->vtnet_vlan_filter[idx] &= ~(1 << bit);
|
|
|
|
if (ifp->if_capenable & IFCAP_VLAN_HWFILTER &&
|
|
ifp->if_drv_flags & IFF_DRV_RUNNING &&
|
|
vtnet_exec_vlan_filter(sc, add, tag) != 0) {
|
|
device_printf(sc->vtnet_dev,
|
|
"cannot %s VLAN %d %s the host filter table\n",
|
|
add ? "add" : "remove", tag, add ? "to" : "from");
|
|
}
|
|
|
|
VTNET_CORE_UNLOCK(sc);
|
|
}
|
|
|
|
static void
|
|
vtnet_register_vlan(void *arg, struct ifnet *ifp, uint16_t tag)
|
|
{
|
|
|
|
if (ifp->if_softc != arg)
|
|
return;
|
|
|
|
vtnet_update_vlan_filter(arg, 1, tag);
|
|
}
|
|
|
|
static void
|
|
vtnet_unregister_vlan(void *arg, struct ifnet *ifp, uint16_t tag)
|
|
{
|
|
|
|
if (ifp->if_softc != arg)
|
|
return;
|
|
|
|
vtnet_update_vlan_filter(arg, 0, tag);
|
|
}
|
|
|
|
static void
|
|
vtnet_update_speed_duplex(struct vtnet_softc *sc)
|
|
{
|
|
struct ifnet *ifp;
|
|
uint32_t speed;
|
|
|
|
ifp = sc->vtnet_ifp;
|
|
|
|
if ((sc->vtnet_features & VIRTIO_NET_F_SPEED_DUPLEX) == 0)
|
|
return;
|
|
|
|
/* BMV: Ignore duplex. */
|
|
speed = virtio_read_dev_config_4(sc->vtnet_dev,
|
|
offsetof(struct virtio_net_config, speed));
|
|
if (speed != UINT32_MAX)
|
|
ifp->if_baudrate = IF_Mbps(speed);
|
|
}
|
|
|
|
static int
|
|
vtnet_is_link_up(struct vtnet_softc *sc)
|
|
{
|
|
uint16_t status;
|
|
|
|
if ((sc->vtnet_features & VIRTIO_NET_F_STATUS) == 0)
|
|
return (1);
|
|
|
|
status = virtio_read_dev_config_2(sc->vtnet_dev,
|
|
offsetof(struct virtio_net_config, status));
|
|
|
|
return ((status & VIRTIO_NET_S_LINK_UP) != 0);
|
|
}
|
|
|
|
static void
|
|
vtnet_update_link_status(struct vtnet_softc *sc)
|
|
{
|
|
struct ifnet *ifp;
|
|
int link;
|
|
|
|
ifp = sc->vtnet_ifp;
|
|
VTNET_CORE_LOCK_ASSERT(sc);
|
|
link = vtnet_is_link_up(sc);
|
|
|
|
/* Notify if the link status has changed. */
|
|
if (link != 0 && sc->vtnet_link_active == 0) {
|
|
vtnet_update_speed_duplex(sc);
|
|
sc->vtnet_link_active = 1;
|
|
if_link_state_change(ifp, LINK_STATE_UP);
|
|
} else if (link == 0 && sc->vtnet_link_active != 0) {
|
|
sc->vtnet_link_active = 0;
|
|
if_link_state_change(ifp, LINK_STATE_DOWN);
|
|
}
|
|
}
|
|
|
|
static int
|
|
vtnet_ifmedia_upd(struct ifnet *ifp __unused)
|
|
{
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
static void
|
|
vtnet_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
|
|
sc = ifp->if_softc;
|
|
|
|
ifmr->ifm_status = IFM_AVALID;
|
|
ifmr->ifm_active = IFM_ETHER;
|
|
|
|
VTNET_CORE_LOCK(sc);
|
|
if (vtnet_is_link_up(sc) != 0) {
|
|
ifmr->ifm_status |= IFM_ACTIVE;
|
|
ifmr->ifm_active |= IFM_10G_T | IFM_FDX;
|
|
} else
|
|
ifmr->ifm_active |= IFM_NONE;
|
|
VTNET_CORE_UNLOCK(sc);
|
|
}
|
|
|
|
static void
|
|
vtnet_get_macaddr(struct vtnet_softc *sc)
|
|
{
|
|
|
|
if (sc->vtnet_flags & VTNET_FLAG_MAC) {
|
|
virtio_read_device_config_array(sc->vtnet_dev,
|
|
offsetof(struct virtio_net_config, mac),
|
|
&sc->vtnet_hwaddr[0], sizeof(uint8_t), ETHER_ADDR_LEN);
|
|
} else {
|
|
/* Generate a random locally administered unicast address. */
|
|
sc->vtnet_hwaddr[0] = 0xB2;
|
|
arc4rand(&sc->vtnet_hwaddr[1], ETHER_ADDR_LEN - 1, 0);
|
|
}
|
|
}
|
|
|
|
static void
|
|
vtnet_set_macaddr(struct vtnet_softc *sc)
|
|
{
|
|
device_t dev;
|
|
int error;
|
|
|
|
dev = sc->vtnet_dev;
|
|
|
|
if (sc->vtnet_flags & VTNET_FLAG_CTRL_MAC) {
|
|
error = vtnet_ctrl_mac_cmd(sc, sc->vtnet_hwaddr);
|
|
if (error)
|
|
device_printf(dev, "unable to set MAC address\n");
|
|
return;
|
|
}
|
|
|
|
/* MAC in config is read-only in modern VirtIO. */
|
|
if (!vtnet_modern(sc) && sc->vtnet_flags & VTNET_FLAG_MAC) {
|
|
for (int i = 0; i < ETHER_ADDR_LEN; i++) {
|
|
virtio_write_dev_config_1(dev,
|
|
offsetof(struct virtio_net_config, mac) + i,
|
|
sc->vtnet_hwaddr[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
vtnet_attached_set_macaddr(struct vtnet_softc *sc)
|
|
{
|
|
|
|
/* Assign MAC address if it was generated. */
|
|
if ((sc->vtnet_flags & VTNET_FLAG_MAC) == 0)
|
|
vtnet_set_macaddr(sc);
|
|
}
|
|
|
|
static void
|
|
vtnet_vlan_tag_remove(struct mbuf *m)
|
|
{
|
|
struct ether_vlan_header *evh;
|
|
|
|
evh = mtod(m, struct ether_vlan_header *);
|
|
m->m_pkthdr.ether_vtag = ntohs(evh->evl_tag);
|
|
m->m_flags |= M_VLANTAG;
|
|
|
|
/* Strip the 802.1Q header. */
|
|
bcopy((char *) evh, (char *) evh + ETHER_VLAN_ENCAP_LEN,
|
|
ETHER_HDR_LEN - ETHER_TYPE_LEN);
|
|
m_adj(m, ETHER_VLAN_ENCAP_LEN);
|
|
}
|
|
|
|
static void
|
|
vtnet_set_rx_process_limit(struct vtnet_softc *sc)
|
|
{
|
|
int limit;
|
|
|
|
limit = vtnet_tunable_int(sc, "rx_process_limit",
|
|
vtnet_rx_process_limit);
|
|
if (limit < 0)
|
|
limit = INT_MAX;
|
|
sc->vtnet_rx_process_limit = limit;
|
|
}
|
|
|
|
static void
|
|
vtnet_setup_rxq_sysctl(struct sysctl_ctx_list *ctx,
|
|
struct sysctl_oid_list *child, struct vtnet_rxq *rxq)
|
|
{
|
|
struct sysctl_oid *node;
|
|
struct sysctl_oid_list *list;
|
|
struct vtnet_rxq_stats *stats;
|
|
char namebuf[16];
|
|
|
|
snprintf(namebuf, sizeof(namebuf), "rxq%d", rxq->vtnrx_id);
|
|
node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, namebuf,
|
|
CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "Receive Queue");
|
|
list = SYSCTL_CHILDREN(node);
|
|
|
|
stats = &rxq->vtnrx_stats;
|
|
|
|
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "ipackets", CTLFLAG_RD,
|
|
&stats->vrxs_ipackets, "Receive packets");
|
|
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "ibytes", CTLFLAG_RD,
|
|
&stats->vrxs_ibytes, "Receive bytes");
|
|
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "iqdrops", CTLFLAG_RD,
|
|
&stats->vrxs_iqdrops, "Receive drops");
|
|
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "ierrors", CTLFLAG_RD,
|
|
&stats->vrxs_ierrors, "Receive errors");
|
|
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "csum", CTLFLAG_RD,
|
|
&stats->vrxs_csum, "Receive checksum offloaded");
|
|
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "csum_failed", CTLFLAG_RD,
|
|
&stats->vrxs_csum_failed, "Receive checksum offload failed");
|
|
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "host_lro", CTLFLAG_RD,
|
|
&stats->vrxs_host_lro, "Receive host segmentation offloaded");
|
|
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "rescheduled", CTLFLAG_RD,
|
|
&stats->vrxs_rescheduled,
|
|
"Receive interrupt handler rescheduled");
|
|
}
|
|
|
|
static void
|
|
vtnet_setup_txq_sysctl(struct sysctl_ctx_list *ctx,
|
|
struct sysctl_oid_list *child, struct vtnet_txq *txq)
|
|
{
|
|
struct sysctl_oid *node;
|
|
struct sysctl_oid_list *list;
|
|
struct vtnet_txq_stats *stats;
|
|
char namebuf[16];
|
|
|
|
snprintf(namebuf, sizeof(namebuf), "txq%d", txq->vtntx_id);
|
|
node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, namebuf,
|
|
CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "Transmit Queue");
|
|
list = SYSCTL_CHILDREN(node);
|
|
|
|
stats = &txq->vtntx_stats;
|
|
|
|
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "opackets", CTLFLAG_RD,
|
|
&stats->vtxs_opackets, "Transmit packets");
|
|
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "obytes", CTLFLAG_RD,
|
|
&stats->vtxs_obytes, "Transmit bytes");
|
|
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "omcasts", CTLFLAG_RD,
|
|
&stats->vtxs_omcasts, "Transmit multicasts");
|
|
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "csum", CTLFLAG_RD,
|
|
&stats->vtxs_csum, "Transmit checksum offloaded");
|
|
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "tso", CTLFLAG_RD,
|
|
&stats->vtxs_tso, "Transmit TCP segmentation offloaded");
|
|
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "rescheduled", CTLFLAG_RD,
|
|
&stats->vtxs_rescheduled,
|
|
"Transmit interrupt handler rescheduled");
|
|
}
|
|
|
|
static void
|
|
vtnet_setup_queue_sysctl(struct vtnet_softc *sc)
|
|
{
|
|
device_t dev;
|
|
struct sysctl_ctx_list *ctx;
|
|
struct sysctl_oid *tree;
|
|
struct sysctl_oid_list *child;
|
|
int i;
|
|
|
|
dev = sc->vtnet_dev;
|
|
ctx = device_get_sysctl_ctx(dev);
|
|
tree = device_get_sysctl_tree(dev);
|
|
child = SYSCTL_CHILDREN(tree);
|
|
|
|
for (i = 0; i < sc->vtnet_req_vq_pairs; i++) {
|
|
vtnet_setup_rxq_sysctl(ctx, child, &sc->vtnet_rxqs[i]);
|
|
vtnet_setup_txq_sysctl(ctx, child, &sc->vtnet_txqs[i]);
|
|
}
|
|
}
|
|
|
|
static void
|
|
vtnet_setup_stat_sysctl(struct sysctl_ctx_list *ctx,
|
|
struct sysctl_oid_list *child, struct vtnet_softc *sc)
|
|
{
|
|
struct vtnet_statistics *stats;
|
|
struct vtnet_rxq_stats rxaccum;
|
|
struct vtnet_txq_stats txaccum;
|
|
|
|
vtnet_accum_stats(sc, &rxaccum, &txaccum);
|
|
|
|
stats = &sc->vtnet_stats;
|
|
stats->rx_csum_offloaded = rxaccum.vrxs_csum;
|
|
stats->rx_csum_failed = rxaccum.vrxs_csum_failed;
|
|
stats->rx_task_rescheduled = rxaccum.vrxs_rescheduled;
|
|
stats->tx_csum_offloaded = txaccum.vtxs_csum;
|
|
stats->tx_tso_offloaded = txaccum.vtxs_tso;
|
|
stats->tx_task_rescheduled = txaccum.vtxs_rescheduled;
|
|
|
|
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "mbuf_alloc_failed",
|
|
CTLFLAG_RD, &stats->mbuf_alloc_failed,
|
|
"Mbuf cluster allocation failures");
|
|
|
|
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_frame_too_large",
|
|
CTLFLAG_RD, &stats->rx_frame_too_large,
|
|
"Received frame larger than the mbuf chain");
|
|
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_enq_replacement_failed",
|
|
CTLFLAG_RD, &stats->rx_enq_replacement_failed,
|
|
"Enqueuing the replacement receive mbuf failed");
|
|
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_mergeable_failed",
|
|
CTLFLAG_RD, &stats->rx_mergeable_failed,
|
|
"Mergeable buffers receive failures");
|
|
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_csum_bad_ethtype",
|
|
CTLFLAG_RD, &stats->rx_csum_bad_ethtype,
|
|
"Received checksum offloaded buffer with unsupported "
|
|
"Ethernet type");
|
|
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_csum_bad_ipproto",
|
|
CTLFLAG_RD, &stats->rx_csum_bad_ipproto,
|
|
"Received checksum offloaded buffer with incorrect IP protocol");
|
|
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_csum_bad_offset",
|
|
CTLFLAG_RD, &stats->rx_csum_bad_offset,
|
|
"Received checksum offloaded buffer with incorrect offset");
|
|
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_csum_bad_proto",
|
|
CTLFLAG_RD, &stats->rx_csum_bad_proto,
|
|
"Received checksum offloaded buffer with incorrect protocol");
|
|
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_csum_failed",
|
|
CTLFLAG_RD, &stats->rx_csum_failed,
|
|
"Received buffer checksum offload failed");
|
|
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_csum_offloaded",
|
|
CTLFLAG_RD, &stats->rx_csum_offloaded,
|
|
"Received buffer checksum offload succeeded");
|
|
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_task_rescheduled",
|
|
CTLFLAG_RD, &stats->rx_task_rescheduled,
|
|
"Times the receive interrupt task rescheduled itself");
|
|
|
|
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_csum_unknown_ethtype",
|
|
CTLFLAG_RD, &stats->tx_csum_unknown_ethtype,
|
|
"Aborted transmit of checksum offloaded buffer with unknown "
|
|
"Ethernet type");
|
|
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_csum_proto_mismatch",
|
|
CTLFLAG_RD, &stats->tx_csum_proto_mismatch,
|
|
"Aborted transmit of checksum offloaded buffer because mismatched "
|
|
"protocols");
|
|
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_tso_not_tcp",
|
|
CTLFLAG_RD, &stats->tx_tso_not_tcp,
|
|
"Aborted transmit of TSO buffer with non TCP protocol");
|
|
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_tso_without_csum",
|
|
CTLFLAG_RD, &stats->tx_tso_without_csum,
|
|
"Aborted transmit of TSO buffer without TCP checksum offload");
|
|
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_defragged",
|
|
CTLFLAG_RD, &stats->tx_defragged,
|
|
"Transmit mbufs defragged");
|
|
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_defrag_failed",
|
|
CTLFLAG_RD, &stats->tx_defrag_failed,
|
|
"Aborted transmit of buffer because defrag failed");
|
|
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_csum_offloaded",
|
|
CTLFLAG_RD, &stats->tx_csum_offloaded,
|
|
"Offloaded checksum of transmitted buffer");
|
|
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_tso_offloaded",
|
|
CTLFLAG_RD, &stats->tx_tso_offloaded,
|
|
"Segmentation offload of transmitted buffer");
|
|
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_task_rescheduled",
|
|
CTLFLAG_RD, &stats->tx_task_rescheduled,
|
|
"Times the transmit interrupt task rescheduled itself");
|
|
}
|
|
|
|
static void
|
|
vtnet_setup_sysctl(struct vtnet_softc *sc)
|
|
{
|
|
device_t dev;
|
|
struct sysctl_ctx_list *ctx;
|
|
struct sysctl_oid *tree;
|
|
struct sysctl_oid_list *child;
|
|
|
|
dev = sc->vtnet_dev;
|
|
ctx = device_get_sysctl_ctx(dev);
|
|
tree = device_get_sysctl_tree(dev);
|
|
child = SYSCTL_CHILDREN(tree);
|
|
|
|
SYSCTL_ADD_INT(ctx, child, OID_AUTO, "max_vq_pairs",
|
|
CTLFLAG_RD, &sc->vtnet_max_vq_pairs, 0,
|
|
"Number of maximum supported virtqueue pairs");
|
|
SYSCTL_ADD_INT(ctx, child, OID_AUTO, "req_vq_pairs",
|
|
CTLFLAG_RD, &sc->vtnet_req_vq_pairs, 0,
|
|
"Number of requested virtqueue pairs");
|
|
SYSCTL_ADD_INT(ctx, child, OID_AUTO, "act_vq_pairs",
|
|
CTLFLAG_RD, &sc->vtnet_act_vq_pairs, 0,
|
|
"Number of active virtqueue pairs");
|
|
|
|
vtnet_setup_stat_sysctl(ctx, child, sc);
|
|
}
|
|
|
|
static void
|
|
vtnet_load_tunables(struct vtnet_softc *sc)
|
|
{
|
|
|
|
sc->vtnet_lro_entry_count = vtnet_tunable_int(sc,
|
|
"lro_entry_count", vtnet_lro_entry_count);
|
|
if (sc->vtnet_lro_entry_count < TCP_LRO_ENTRIES)
|
|
sc->vtnet_lro_entry_count = TCP_LRO_ENTRIES;
|
|
|
|
sc->vtnet_lro_mbufq_depth = vtnet_tunable_int(sc,
|
|
"lro_mbufq_depth", vtnet_lro_mbufq_depth);
|
|
}
|
|
|
|
static int
|
|
vtnet_rxq_enable_intr(struct vtnet_rxq *rxq)
|
|
{
|
|
|
|
return (virtqueue_enable_intr(rxq->vtnrx_vq));
|
|
}
|
|
|
|
static void
|
|
vtnet_rxq_disable_intr(struct vtnet_rxq *rxq)
|
|
{
|
|
|
|
virtqueue_disable_intr(rxq->vtnrx_vq);
|
|
}
|
|
|
|
static int
|
|
vtnet_txq_enable_intr(struct vtnet_txq *txq)
|
|
{
|
|
struct virtqueue *vq;
|
|
|
|
vq = txq->vtntx_vq;
|
|
|
|
if (vtnet_txq_below_threshold(txq) != 0)
|
|
return (virtqueue_postpone_intr(vq, VQ_POSTPONE_LONG));
|
|
|
|
/*
|
|
* The free count is above our threshold. Keep the Tx interrupt
|
|
* disabled until the queue is fuller.
|
|
*/
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
vtnet_txq_disable_intr(struct vtnet_txq *txq)
|
|
{
|
|
|
|
virtqueue_disable_intr(txq->vtntx_vq);
|
|
}
|
|
|
|
static void
|
|
vtnet_enable_rx_interrupts(struct vtnet_softc *sc)
|
|
{
|
|
struct vtnet_rxq *rxq;
|
|
int i;
|
|
|
|
for (i = 0; i < sc->vtnet_act_vq_pairs; i++) {
|
|
rxq = &sc->vtnet_rxqs[i];
|
|
if (vtnet_rxq_enable_intr(rxq) != 0)
|
|
taskqueue_enqueue(rxq->vtnrx_tq, &rxq->vtnrx_intrtask);
|
|
}
|
|
}
|
|
|
|
static void
|
|
vtnet_enable_tx_interrupts(struct vtnet_softc *sc)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < sc->vtnet_act_vq_pairs; i++)
|
|
vtnet_txq_enable_intr(&sc->vtnet_txqs[i]);
|
|
}
|
|
|
|
static void
|
|
vtnet_enable_interrupts(struct vtnet_softc *sc)
|
|
{
|
|
|
|
vtnet_enable_rx_interrupts(sc);
|
|
vtnet_enable_tx_interrupts(sc);
|
|
}
|
|
|
|
static void
|
|
vtnet_disable_rx_interrupts(struct vtnet_softc *sc)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < sc->vtnet_max_vq_pairs; i++)
|
|
vtnet_rxq_disable_intr(&sc->vtnet_rxqs[i]);
|
|
}
|
|
|
|
static void
|
|
vtnet_disable_tx_interrupts(struct vtnet_softc *sc)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < sc->vtnet_max_vq_pairs; i++)
|
|
vtnet_txq_disable_intr(&sc->vtnet_txqs[i]);
|
|
}
|
|
|
|
static void
|
|
vtnet_disable_interrupts(struct vtnet_softc *sc)
|
|
{
|
|
|
|
vtnet_disable_rx_interrupts(sc);
|
|
vtnet_disable_tx_interrupts(sc);
|
|
}
|
|
|
|
static int
|
|
vtnet_tunable_int(struct vtnet_softc *sc, const char *knob, int def)
|
|
{
|
|
char path[64];
|
|
|
|
snprintf(path, sizeof(path),
|
|
"hw.vtnet.%d.%s", device_get_unit(sc->vtnet_dev), knob);
|
|
TUNABLE_INT_FETCH(path, &def);
|
|
|
|
return (def);
|
|
}
|
|
|
|
#ifdef DEBUGNET
|
|
static void
|
|
vtnet_debugnet_init(struct ifnet *ifp, int *nrxr, int *ncl, int *clsize)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
|
|
sc = if_getsoftc(ifp);
|
|
|
|
VTNET_CORE_LOCK(sc);
|
|
*nrxr = sc->vtnet_req_vq_pairs;
|
|
*ncl = DEBUGNET_MAX_IN_FLIGHT;
|
|
*clsize = sc->vtnet_rx_clustersz;
|
|
VTNET_CORE_UNLOCK(sc);
|
|
}
|
|
|
|
static void
|
|
vtnet_debugnet_event(struct ifnet *ifp __unused, enum debugnet_ev event __unused)
|
|
{
|
|
}
|
|
|
|
static int
|
|
vtnet_debugnet_transmit(struct ifnet *ifp, struct mbuf *m)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
struct vtnet_txq *txq;
|
|
int error;
|
|
|
|
sc = if_getsoftc(ifp);
|
|
if ((if_getdrvflags(ifp) & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
|
|
IFF_DRV_RUNNING)
|
|
return (EBUSY);
|
|
|
|
txq = &sc->vtnet_txqs[0];
|
|
error = vtnet_txq_encap(txq, &m, M_NOWAIT | M_USE_RESERVE);
|
|
if (error == 0)
|
|
(void)vtnet_txq_notify(txq);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
vtnet_debugnet_poll(struct ifnet *ifp, int count)
|
|
{
|
|
struct vtnet_softc *sc;
|
|
int i;
|
|
|
|
sc = if_getsoftc(ifp);
|
|
if ((if_getdrvflags(ifp) & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
|
|
IFF_DRV_RUNNING)
|
|
return (EBUSY);
|
|
|
|
(void)vtnet_txq_eof(&sc->vtnet_txqs[0]);
|
|
for (i = 0; i < sc->vtnet_act_vq_pairs; i++)
|
|
(void)vtnet_rxq_eof(&sc->vtnet_rxqs[i]);
|
|
return (0);
|
|
}
|
|
#endif /* DEBUGNET */
|