#include "opt_inet.h"
#include "opt_inet6.h"
#include <sys/param.h>
#include <sys/eventhandler.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/sockio.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/msan.h>
#include <sys/sbuf.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <sys/random.h>
#include <sys/sglist.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/taskqueue.h>
#include <sys/smp.h>
#include <machine/smp.h>
#include <vm/uma.h>
#include <net/debugnet.h>
#include <net/ethernet.h>
#include <net/pfil.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_arp.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/if_media.h>
#include <net/if_vlan_var.h>
#include <net/bpf.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#include <netinet/udp.h>
#include <netinet/tcp.h>
#include <netinet/tcp_lro.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <dev/virtio/virtio.h>
#include <dev/virtio/virtqueue.h>
#include <dev/virtio/network/virtio_net.h>
#include <dev/virtio/network/if_vtnetvar.h>
#include "virtio_if.h"
#if defined(INET) || defined(INET6)
#include <machine/in_cksum.h>
#endif
#ifdef __NO_STRICT_ALIGNMENT
#define VTNET_ETHER_ALIGN 0
#else
#define VTNET_ETHER_ALIGN ETHER_ALIGN
#endif
static int vtnet_modevent(module_t, int, void *);
static int vtnet_probe(device_t);
static int vtnet_attach(device_t);
static int vtnet_detach(device_t);
static int vtnet_suspend(device_t);
static int vtnet_resume(device_t);
static int vtnet_shutdown(device_t);
static int vtnet_attach_completed(device_t);
static int vtnet_config_change(device_t);
static int vtnet_negotiate_features(struct vtnet_softc *);
static int vtnet_setup_features(struct vtnet_softc *);
static int vtnet_init_rxq(struct vtnet_softc *, int);
static int vtnet_init_txq(struct vtnet_softc *, int);
static int vtnet_alloc_rxtx_queues(struct vtnet_softc *);
static void vtnet_free_rxtx_queues(struct vtnet_softc *);
static int vtnet_alloc_rx_filters(struct vtnet_softc *);
static void vtnet_free_rx_filters(struct vtnet_softc *);
static int vtnet_alloc_virtqueues(struct vtnet_softc *);
static void vtnet_alloc_interface(struct vtnet_softc *);
static int vtnet_setup_interface(struct vtnet_softc *);
static int vtnet_ioctl_mtu(struct vtnet_softc *, u_int);
static int vtnet_ioctl_ifflags(struct vtnet_softc *);
static int vtnet_ioctl_multi(struct vtnet_softc *);
static int vtnet_ioctl_ifcap(struct vtnet_softc *, struct ifreq *);
static int vtnet_ioctl(if_t, u_long, caddr_t);
static uint64_t vtnet_get_counter(if_t, ift_counter);
static int vtnet_rxq_populate(struct vtnet_rxq *);
static void vtnet_rxq_free_mbufs(struct vtnet_rxq *);
static struct mbuf *
vtnet_rx_alloc_buf(struct vtnet_softc *, int , struct mbuf **);
static int vtnet_rxq_replace_lro_nomrg_buf(struct vtnet_rxq *,
struct mbuf *, int);
static int vtnet_rxq_replace_buf(struct vtnet_rxq *, struct mbuf *, int);
static int vtnet_rxq_enqueue_buf(struct vtnet_rxq *, struct mbuf *);
static int vtnet_rxq_new_buf(struct vtnet_rxq *);
#if defined(INET) || defined(INET6)
static int vtnet_rxq_csum_needs_csum(struct vtnet_rxq *, struct mbuf *,
bool, int, struct virtio_net_hdr *);
static void vtnet_rxq_csum_data_valid(struct vtnet_rxq *, struct mbuf *,
int);
static int vtnet_rxq_csum(struct vtnet_rxq *, struct mbuf *,
struct virtio_net_hdr *);
#endif
static void vtnet_rxq_discard_merged_bufs(struct vtnet_rxq *, int);
static void vtnet_rxq_discard_buf(struct vtnet_rxq *, struct mbuf *);
static int vtnet_rxq_merged_eof(struct vtnet_rxq *, struct mbuf *, int);
static void vtnet_rxq_input(struct vtnet_rxq *, struct mbuf *,
struct virtio_net_hdr *);
static int vtnet_rxq_eof(struct vtnet_rxq *);
static void vtnet_rx_vq_process(struct vtnet_rxq *rxq, int tries);
static void vtnet_rx_vq_intr(void *);
static void vtnet_rxq_tq_intr(void *, int);
static int vtnet_txq_intr_threshold(struct vtnet_txq *);
static int vtnet_txq_below_threshold(struct vtnet_txq *);
static int vtnet_txq_notify(struct vtnet_txq *);
static void vtnet_txq_free_mbufs(struct vtnet_txq *);
static int vtnet_txq_offload_ctx(struct vtnet_txq *, struct mbuf *,
int *, int *, int *);
static int vtnet_txq_offload_tso(struct vtnet_txq *, struct mbuf *, int,
int, struct virtio_net_hdr *);
static struct mbuf *
vtnet_txq_offload(struct vtnet_txq *, struct mbuf *,
struct virtio_net_hdr *);
static int vtnet_txq_enqueue_buf(struct vtnet_txq *, struct mbuf **,
struct vtnet_tx_header *);
static int vtnet_txq_encap(struct vtnet_txq *, struct mbuf **, int);
static void vtnet_start_locked(struct vtnet_txq *, if_t);
static void vtnet_start(if_t);
static int vtnet_txq_mq_start_locked(struct vtnet_txq *, struct mbuf *);
static int vtnet_txq_mq_start(if_t, struct mbuf *);
static void vtnet_txq_tq_deferred(void *, int);
static void vtnet_qflush(if_t);
static void vtnet_txq_start(struct vtnet_txq *);
static void vtnet_txq_tq_intr(void *, int);
static int vtnet_txq_eof(struct vtnet_txq *);
static void vtnet_tx_vq_intr(void *);
static void vtnet_tx_start_all(struct vtnet_softc *);
static int vtnet_watchdog(struct vtnet_txq *);
static void vtnet_accum_stats(struct vtnet_softc *,
struct vtnet_rxq_stats *, struct vtnet_txq_stats *);
static void vtnet_tick(void *);
static void vtnet_start_taskqueues(struct vtnet_softc *);
static void vtnet_free_taskqueues(struct vtnet_softc *);
static void vtnet_drain_taskqueues(struct vtnet_softc *);
static void vtnet_drain_rxtx_queues(struct vtnet_softc *);
static void vtnet_stop_rendezvous(struct vtnet_softc *);
static void vtnet_stop(struct vtnet_softc *);
static int vtnet_virtio_reinit(struct vtnet_softc *);
static void vtnet_init_rx_filters(struct vtnet_softc *);
static int vtnet_init_rx_queues(struct vtnet_softc *);
static int vtnet_init_tx_queues(struct vtnet_softc *);
static int vtnet_init_rxtx_queues(struct vtnet_softc *);
static void vtnet_set_active_vq_pairs(struct vtnet_softc *);
static void vtnet_update_rx_offloads(struct vtnet_softc *);
static int vtnet_reinit(struct vtnet_softc *);
static void vtnet_init_locked(struct vtnet_softc *, int);
static void vtnet_init(void *);
static void vtnet_free_ctrl_vq(struct vtnet_softc *);
static void vtnet_exec_ctrl_cmd(struct vtnet_softc *, void *,
struct sglist *, int, int);
static int vtnet_ctrl_mac_cmd(struct vtnet_softc *, uint8_t *);
static int vtnet_ctrl_guest_offloads(struct vtnet_softc *, uint64_t);
static int vtnet_ctrl_mq_cmd(struct vtnet_softc *, uint16_t);
static int vtnet_ctrl_rx_cmd(struct vtnet_softc *, uint8_t, bool);
static int vtnet_set_promisc(struct vtnet_softc *, bool);
static int vtnet_set_allmulti(struct vtnet_softc *, bool);
static void vtnet_rx_filter(struct vtnet_softc *);
static void vtnet_rx_filter_mac(struct vtnet_softc *);
static int vtnet_exec_vlan_filter(struct vtnet_softc *, int, uint16_t);
static void vtnet_rx_filter_vlan(struct vtnet_softc *);
static void vtnet_update_vlan_filter(struct vtnet_softc *, int, uint16_t);
static void vtnet_register_vlan(void *, if_t, uint16_t);
static void vtnet_unregister_vlan(void *, if_t, uint16_t);
static void vtnet_update_speed_duplex(struct vtnet_softc *);
static int vtnet_is_link_up(struct vtnet_softc *);
static void vtnet_update_link_status(struct vtnet_softc *);
static int vtnet_ifmedia_upd(if_t);
static void vtnet_ifmedia_sts(if_t, struct ifmediareq *);
static void vtnet_get_macaddr(struct vtnet_softc *);
static void vtnet_set_macaddr(struct vtnet_softc *);
static void vtnet_attached_set_macaddr(struct vtnet_softc *);
static void vtnet_vlan_tag_remove(struct mbuf *);
static void vtnet_set_rx_process_limit(struct vtnet_softc *);
static void vtnet_setup_rxq_sysctl(struct sysctl_ctx_list *,
struct sysctl_oid_list *, struct vtnet_rxq *);
static void vtnet_setup_txq_sysctl(struct sysctl_ctx_list *,
struct sysctl_oid_list *, struct vtnet_txq *);
static void vtnet_setup_queue_sysctl(struct vtnet_softc *);
static void vtnet_load_tunables(struct vtnet_softc *);
static void vtnet_setup_sysctl(struct vtnet_softc *);
static int vtnet_rxq_enable_intr(struct vtnet_rxq *);
static void vtnet_rxq_disable_intr(struct vtnet_rxq *);
static int vtnet_txq_enable_intr(struct vtnet_txq *);
static void vtnet_txq_disable_intr(struct vtnet_txq *);
static void vtnet_enable_rx_interrupts(struct vtnet_softc *);
static void vtnet_enable_tx_interrupts(struct vtnet_softc *);
static void vtnet_enable_interrupts(struct vtnet_softc *);
static void vtnet_disable_rx_interrupts(struct vtnet_softc *);
static void vtnet_disable_tx_interrupts(struct vtnet_softc *);
static void vtnet_disable_interrupts(struct vtnet_softc *);
static int vtnet_tunable_int(struct vtnet_softc *, const char *, int);
DEBUGNET_DEFINE(vtnet);
#define vtnet_htog16(_sc, _val) virtio_htog16(vtnet_modern(_sc), _val)
#define vtnet_htog32(_sc, _val) virtio_htog32(vtnet_modern(_sc), _val)
#define vtnet_htog64(_sc, _val) virtio_htog64(vtnet_modern(_sc), _val)
#define vtnet_gtoh16(_sc, _val) virtio_gtoh16(vtnet_modern(_sc), _val)
#define vtnet_gtoh32(_sc, _val) virtio_gtoh32(vtnet_modern(_sc), _val)
#define vtnet_gtoh64(_sc, _val) virtio_gtoh64(vtnet_modern(_sc), _val)
static SYSCTL_NODE(_hw, OID_AUTO, vtnet, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
"VirtIO Net driver parameters");
static int vtnet_csum_disable = 0;
SYSCTL_INT(_hw_vtnet, OID_AUTO, csum_disable, CTLFLAG_RDTUN,
&vtnet_csum_disable, 0, "Disables receive and send checksum offload");
static int vtnet_fixup_needs_csum = 0;
SYSCTL_INT(_hw_vtnet, OID_AUTO, fixup_needs_csum, CTLFLAG_RDTUN,
&vtnet_fixup_needs_csum, 0,
"Calculate valid checksum for NEEDS_CSUM packets");
static int vtnet_tso_disable = 0;
SYSCTL_INT(_hw_vtnet, OID_AUTO, tso_disable, CTLFLAG_RDTUN,
&vtnet_tso_disable, 0, "Disables TSO");
static int vtnet_lro_disable = 1;
SYSCTL_INT(_hw_vtnet, OID_AUTO, lro_disable, CTLFLAG_RDTUN,
&vtnet_lro_disable, 0, "Disables hardware LRO");
static int vtnet_mq_disable = 0;
SYSCTL_INT(_hw_vtnet, OID_AUTO, mq_disable, CTLFLAG_RDTUN,
&vtnet_mq_disable, 0, "Disables multiqueue support");
static int vtnet_mq_max_pairs = VTNET_MAX_QUEUE_PAIRS;
SYSCTL_INT(_hw_vtnet, OID_AUTO, mq_max_pairs, CTLFLAG_RDTUN,
&vtnet_mq_max_pairs, 0, "Maximum number of multiqueue pairs");
static int vtnet_tso_maxlen = IP_MAXPACKET;
SYSCTL_INT(_hw_vtnet, OID_AUTO, tso_maxlen, CTLFLAG_RDTUN,
&vtnet_tso_maxlen, 0, "TSO burst limit");
static int vtnet_rx_process_limit = 1024;
SYSCTL_INT(_hw_vtnet, OID_AUTO, rx_process_limit, CTLFLAG_RDTUN,
&vtnet_rx_process_limit, 0,
"Number of RX segments processed in one pass");
static int vtnet_lro_entry_count = 128;
SYSCTL_INT(_hw_vtnet, OID_AUTO, lro_entry_count, CTLFLAG_RDTUN,
&vtnet_lro_entry_count, 0, "Software LRO entry count");
static int vtnet_lro_mbufq_depth = 0;
SYSCTL_UINT(_hw_vtnet, OID_AUTO, lro_mbufq_depth, CTLFLAG_RDTUN,
&vtnet_lro_mbufq_depth, 0, "Depth of software LRO mbuf queue");
static int vtnet_altq_disable = 0;
SYSCTL_INT(_hw_vtnet, OID_AUTO, altq_disable, CTLFLAG_RDTUN,
&vtnet_altq_disable, 0, "Disables ALTQ Support");
#define VTNET_ALTQ_ENABLED (VTNET_ALTQ_CAPABLE && (!vtnet_altq_disable))
static uma_zone_t vtnet_tx_header_zone;
static struct virtio_feature_desc vtnet_feature_desc[] = {
{ VIRTIO_NET_F_CSUM, "TxChecksum" },
{ VIRTIO_NET_F_GUEST_CSUM, "RxChecksum" },
{ VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, "CtrlRxOffloads" },
{ VIRTIO_NET_F_MAC, "MAC" },
{ VIRTIO_NET_F_GSO, "TxGSO" },
{ VIRTIO_NET_F_GUEST_TSO4, "RxLROv4" },
{ VIRTIO_NET_F_GUEST_TSO6, "RxLROv6" },
{ VIRTIO_NET_F_GUEST_ECN, "RxLROECN" },
{ VIRTIO_NET_F_GUEST_UFO, "RxUFO" },
{ VIRTIO_NET_F_HOST_TSO4, "TxTSOv4" },
{ VIRTIO_NET_F_HOST_TSO6, "TxTSOv6" },
{ VIRTIO_NET_F_HOST_ECN, "TxTSOECN" },
{ VIRTIO_NET_F_HOST_UFO, "TxUFO" },
{ VIRTIO_NET_F_MRG_RXBUF, "MrgRxBuf" },
{ VIRTIO_NET_F_STATUS, "Status" },
{ VIRTIO_NET_F_CTRL_VQ, "CtrlVq" },
{ VIRTIO_NET_F_CTRL_RX, "CtrlRxMode" },
{ VIRTIO_NET_F_CTRL_VLAN, "CtrlVLANFilter" },
{ VIRTIO_NET_F_CTRL_RX_EXTRA, "CtrlRxModeExtra" },
{ VIRTIO_NET_F_GUEST_ANNOUNCE, "GuestAnnounce" },
{ VIRTIO_NET_F_MQ, "Multiqueue" },
{ VIRTIO_NET_F_CTRL_MAC_ADDR, "CtrlMacAddr" },
{ VIRTIO_NET_F_SPEED_DUPLEX, "SpeedDuplex" },
{ 0, NULL }
};
static device_method_t vtnet_methods[] = {
DEVMETHOD(device_probe, vtnet_probe),
DEVMETHOD(device_attach, vtnet_attach),
DEVMETHOD(device_detach, vtnet_detach),
DEVMETHOD(device_suspend, vtnet_suspend),
DEVMETHOD(device_resume, vtnet_resume),
DEVMETHOD(device_shutdown, vtnet_shutdown),
DEVMETHOD(virtio_attach_completed, vtnet_attach_completed),
DEVMETHOD(virtio_config_change, vtnet_config_change),
DEVMETHOD_END
};
#ifdef DEV_NETMAP
#include <dev/netmap/if_vtnet_netmap.h>
#endif
static driver_t vtnet_driver = {
.name = "vtnet",
.methods = vtnet_methods,
.size = sizeof(struct vtnet_softc)
};
VIRTIO_DRIVER_MODULE(vtnet, vtnet_driver, vtnet_modevent, NULL);
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
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);
vtnet_alloc_interface(sc);
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;
if_t 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
if (sc->vtnet_pfil != NULL) {
pfil_head_unregister(sc->vtnet_pfil);
sc->vtnet_pfil = NULL;
}
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;
if_t ifp;
sc = device_get_softc(dev);
ifp = sc->vtnet_ifp;
VTNET_CORE_LOCK(sc);
if (if_getflags(ifp) & 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)
{
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;
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;
if (VTNET_ALTQ_ENABLED || vtnet_tunable_int(sc, "mq_disable", vtnet_mq_disable))
features &= ~VIRTIO_NET_F_MQ;
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) {
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) {
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)) {
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)) {
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;
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;
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);
if (!VTNET_ALTQ_ENABLED) {
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);
}
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;
}
if (!VTNET_ALTQ_ENABLED) {
if (txq->vtntx_br != NULL) {
buf_ring_free(txq->vtntx_br, M_DEVBUF);
txq->vtntx_br = NULL;
}
}
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, nvqs, error;
dev = sc->vtnet_dev;
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);
}
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));
}
error = virtio_alloc_virtqueues(dev, nvqs, info);
free(info, M_TEMP);
return (error);
}
static void
vtnet_alloc_interface(struct vtnet_softc *sc)
{
device_t dev;
if_t ifp;
dev = sc->vtnet_dev;
ifp = if_alloc(IFT_ETHER);
sc->vtnet_ifp = ifp;
if_setsoftc(ifp, sc);
if_initname(ifp, device_get_name(dev), device_get_unit(dev));
}
static int
vtnet_setup_interface(struct vtnet_softc *sc)
{
device_t dev;
struct pfil_head_args pa;
if_t ifp;
dev = sc->vtnet_dev;
ifp = sc->vtnet_ifp;
if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
if_setbaudrate(ifp, IF_Gbps(10));
if_setinitfn(ifp, vtnet_init);
if_setioctlfn(ifp, vtnet_ioctl);
if_setgetcounterfn(ifp, vtnet_get_counter);
if (!VTNET_ALTQ_ENABLED) {
if_settransmitfn(ifp, vtnet_txq_mq_start);
if_setqflushfn(ifp, vtnet_qflush);
} else {
struct virtqueue *vq = sc->vtnet_txqs[0].vtntx_vq;
if_setstartfn(ifp, vtnet_start);
if_setsendqlen(ifp, virtqueue_size(vq) - 1);
if_setsendqready(ifp);
}
vtnet_get_macaddr(sc);
if (virtio_with_feature(dev, VIRTIO_NET_F_STATUS))
if_setcapabilitiesbit(ifp, IFCAP_LINKSTATE, 0);
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;
if_setcapabilitiesbit(ifp, IFCAP_TXCSUM | IFCAP_TXCSUM_IPV6, 0);
gso = virtio_with_feature(dev, VIRTIO_NET_F_GSO);
if (gso || virtio_with_feature(dev, VIRTIO_NET_F_HOST_TSO4))
if_setcapabilitiesbit(ifp, IFCAP_TSO4, 0);
if (gso || virtio_with_feature(dev, VIRTIO_NET_F_HOST_TSO6))
if_setcapabilitiesbit(ifp, IFCAP_TSO6, 0);
if (gso || virtio_with_feature(dev, VIRTIO_NET_F_HOST_ECN))
sc->vtnet_flags |= VTNET_FLAG_TSO_ECN;
if (if_getcapabilities(ifp) & (IFCAP_TSO4 | IFCAP_TSO6)) {
int tso_maxlen;
if_setcapabilitiesbit(ifp, IFCAP_VLAN_HWTSO, 0);
tso_maxlen = vtnet_tunable_int(sc, "tso_maxlen",
vtnet_tso_maxlen);
if_sethwtsomax(ifp, tso_maxlen -
(ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN));
if_sethwtsomaxsegcount(ifp, sc->vtnet_tx_nsegs - 1);
if_sethwtsomaxsegsize(ifp, PAGE_SIZE);
}
}
if (virtio_with_feature(dev, VIRTIO_NET_F_GUEST_CSUM)) {
if_setcapabilitiesbit(ifp, IFCAP_RXCSUM, 0);
if_setcapabilitiesbit(ifp, IFCAP_RXCSUM_IPV6, 0);
if (vtnet_tunable_int(sc, "fixup_needs_csum",
vtnet_fixup_needs_csum) != 0)
sc->vtnet_flags |= VTNET_FLAG_FIXUP_NEEDS_CSUM;
if_setcapabilitiesbit(ifp, IFCAP_LRO, 0);
}
if (if_getcapabilities(ifp) & (IFCAP_HWCSUM | IFCAP_HWCSUM_IPV6)) {
if_setcapabilitiesbit(ifp, IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_HWCSUM, 0);
}
if (sc->vtnet_max_mtu >= ETHERMTU_JUMBO)
if_setcapabilitiesbit(ifp, IFCAP_JUMBO_MTU, 0);
if_setcapabilitiesbit(ifp, IFCAP_VLAN_MTU, 0);
if_setcapabilitiesbit(ifp, IFCAP_HWSTATS, 0);
if_setcapenable(ifp, if_getcapabilities(ifp));
if (sc->vtnet_flags & VTNET_FLAG_VLAN_FILTER) {
if_setcapabilitiesbit(ifp, IFCAP_VLAN_HWFILTER, 0);
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);
if_setifheaderlen(ifp, 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 = if_name(ifp);
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);
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 (VTNET_ETHER_ALIGN != 0 && sc->vtnet_hdr_size % 4 == 0) {
framesz += VTNET_ETHER_ALIGN;
}
if (framesz <= MCLBYTES)
return (MCLBYTES);
else if (framesz <= MJUMPAGESIZE)
return (MJUMPAGESIZE);
else if (framesz <= MJUM9BYTES)
return (MJUM9BYTES);
return (MCLBYTES);
}
static int
vtnet_ioctl_mtu(struct vtnet_softc *sc, u_int mtu)
{
if_t ifp;
int clustersz;
ifp = sc->vtnet_ifp;
VTNET_CORE_LOCK_ASSERT(sc);
if (if_getmtu(ifp) == mtu)
return (0);
else if (mtu < ETHERMIN || mtu > sc->vtnet_max_mtu)
return (EINVAL);
if_setmtu(ifp, mtu);
clustersz = vtnet_rx_cluster_size(sc, mtu);
if (clustersz != sc->vtnet_rx_clustersz &&
if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
if_setdrvflagbits(ifp, 0, IFF_DRV_RUNNING);
vtnet_init_locked(sc, 0);
}
return (0);
}
static int
vtnet_ioctl_ifflags(struct vtnet_softc *sc)
{
if_t ifp;
int drv_running;
ifp = sc->vtnet_ifp;
drv_running = (if_getdrvflags(ifp) & IFF_DRV_RUNNING) != 0;
VTNET_CORE_LOCK_ASSERT(sc);
if ((if_getflags(ifp) & IFF_UP) == 0) {
if (drv_running)
vtnet_stop(sc);
goto out;
}
if (!drv_running) {
vtnet_init_locked(sc, 0);
goto out;
}
if ((if_getflags(ifp) ^ sc->vtnet_if_flags) &
(IFF_PROMISC | IFF_ALLMULTI)) {
if (sc->vtnet_flags & VTNET_FLAG_CTRL_RX)
vtnet_rx_filter(sc);
else {
if_setflagbits(ifp, IFF_ALLMULTI, 0);
if_setflagbits(ifp, IFF_PROMISC, 0);
}
}
out:
sc->vtnet_if_flags = if_getflags(ifp);
return (0);
}
static int
vtnet_ioctl_multi(struct vtnet_softc *sc)
{
if_t ifp;
ifp = sc->vtnet_ifp;
VTNET_CORE_LOCK_ASSERT(sc);
if (sc->vtnet_flags & VTNET_FLAG_CTRL_RX &&
if_getdrvflags(ifp) & IFF_DRV_RUNNING)
vtnet_rx_filter_mac(sc);
return (0);
}
static int
vtnet_ioctl_ifcap(struct vtnet_softc *sc, struct ifreq *ifr)
{
if_t ifp;
int mask, reinit, update;
ifp = sc->vtnet_ifp;
mask = (ifr->ifr_reqcap & if_getcapabilities(ifp)) ^ if_getcapenable(ifp);
reinit = update = 0;
VTNET_CORE_LOCK_ASSERT(sc);
if (mask & IFCAP_TXCSUM) {
if (if_getcapenable(ifp) & IFCAP_TXCSUM &&
if_getcapenable(ifp) & IFCAP_TSO4) {
if_setcapenablebit(ifp, 0, IFCAP_TSO4);
if_sethwassistbits(ifp, 0, CSUM_IP_TSO);
mask &= ~IFCAP_TSO4;
}
if_togglecapenable(ifp, IFCAP_TXCSUM);
if_togglehwassist(ifp, VTNET_CSUM_OFFLOAD);
}
if (mask & IFCAP_TXCSUM_IPV6) {
if (if_getcapenable(ifp) & IFCAP_TXCSUM_IPV6 &&
if_getcapenable(ifp) & IFCAP_TSO6) {
if_setcapenablebit(ifp, 0, IFCAP_TSO6);
if_sethwassistbits(ifp, 0, CSUM_IP6_TSO);
mask &= ~IFCAP_TSO6;
}
if_togglecapenable(ifp, IFCAP_TXCSUM_IPV6);
if_togglehwassist(ifp, VTNET_CSUM_OFFLOAD_IPV6);
}
if (mask & IFCAP_TSO4) {
if (if_getcapenable(ifp) & (IFCAP_TXCSUM | IFCAP_TSO4)) {
if_togglecapenable(ifp, IFCAP_TSO4);
if_togglehwassist(ifp, CSUM_IP_TSO);
}
}
if (mask & IFCAP_TSO6) {
if (if_getcapenable(ifp) & (IFCAP_TXCSUM_IPV6 | IFCAP_TSO6)) {
if_togglecapenable(ifp, IFCAP_TSO6);
if_togglehwassist(ifp, CSUM_IP6_TSO);
}
}
if (mask & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6 | IFCAP_LRO)) {
if (sc->vtnet_features & VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)
update = 1;
else
reinit = 1;
if ((mask & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6 | IFCAP_LRO)) ==
IFCAP_LRO && vtnet_software_lro(sc))
reinit = update = 0;
if (mask & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6)) {
if_togglecapenable(ifp, IFCAP_RXCSUM);
if_togglecapenable(ifp, IFCAP_RXCSUM_IPV6);
}
if (mask & IFCAP_LRO)
if_togglecapenable(ifp, IFCAP_LRO);
if ((if_getcapenable(ifp) &
(IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6)) == 0)
if_setcapenablebit(ifp, 0, IFCAP_LRO);
}
if (mask & IFCAP_VLAN_HWFILTER) {
reinit = 1;
if (mask & IFCAP_VLAN_HWFILTER)
if_togglecapenable(ifp, IFCAP_VLAN_HWFILTER);
}
if (mask & IFCAP_VLAN_HWTSO)
if_togglecapenable(ifp, IFCAP_VLAN_HWTSO);
if (mask & IFCAP_VLAN_HWTAGGING)
if_togglecapenable(ifp, IFCAP_VLAN_HWTAGGING);
if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
if (reinit) {
if_setdrvflagbits(ifp, 0, IFF_DRV_RUNNING);
vtnet_init_locked(sc, 0);
} else if (update)
vtnet_update_rx_offloads(sc);
}
return (0);
}
static int
vtnet_ioctl(if_t ifp, u_long cmd, caddr_t data)
{
struct vtnet_softc *sc;
struct ifreq *ifr;
int error;
sc = if_getsoftc(ifp);
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
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);
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
void *kring = NULL;
#endif
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 (VTNET_ETHER_ALIGN != 0 && sc->vtnet_hdr_size % 4 == 0) {
m_adj(m, VTNET_ETHER_ALIGN);
}
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);
}
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;
if (VTNET_ETHER_ALIGN != 0 && sc->vtnet_hdr_size % 4 == 0)
clustersz -= VTNET_ETHER_ALIGN;
m_prev = NULL;
m_tail = NULL;
nreplace = 0;
m = m0;
len = len0;
while (len > 0) {
if (m == NULL) {
sc->vtnet_stats.rx_frame_too_large++;
return (EMSGSIZE);
}
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);
}
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) {
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;
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));
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);
}
#if defined(INET) || defined(INET6)
static int
vtnet_rxq_csum_needs_csum(struct vtnet_rxq *rxq, struct mbuf *m, bool isipv6,
int protocol, struct virtio_net_hdr *hdr)
{
struct vtnet_softc *sc;
KASSERT(protocol == IPPROTO_TCP || protocol == IPPROTO_UDP,
("%s: unsupported IP protocol %d", __func__, protocol));
sc = rxq->vtnrx_sc;
if ((sc->vtnet_flags & VTNET_FLAG_FIXUP_NEEDS_CSUM) == 0) {
switch (protocol) {
case IPPROTO_TCP:
m->m_pkthdr.csum_flags |=
(isipv6 ? CSUM_TCP_IPV6 : CSUM_TCP);
break;
case IPPROTO_UDP:
m->m_pkthdr.csum_flags |=
(isipv6 ? CSUM_UDP_IPV6 : CSUM_UDP);
break;
}
m->m_pkthdr.csum_data = hdr->csum_offset;
return (0);
}
int csum_off, csum_end;
uint16_t csum;
csum_off = hdr->csum_start + hdr->csum_offset;
csum_end = csum_off + sizeof(uint16_t);
if (m->m_len < csum_end || m->m_pkthdr.len < csum_end) {
sc->vtnet_stats.rx_csum_bad_offset++;
return (1);
}
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;
return (0);
}
static void
vtnet_rxq_csum_data_valid(struct vtnet_rxq *rxq, struct mbuf *m, int protocol)
{
KASSERT(protocol == IPPROTO_TCP || protocol == IPPROTO_UDP,
("%s: unsupported IP protocol %d", __func__, protocol));
m->m_pkthdr.csum_flags |= CSUM_DATA_VALID | CSUM_PSEUDO_HDR;
m->m_pkthdr.csum_data = 0xFFFF;
}
static int
vtnet_rxq_csum(struct vtnet_rxq *rxq, struct mbuf *m,
struct virtio_net_hdr *hdr)
{
const struct ether_header *eh;
struct vtnet_softc *sc;
int hoff, protocol;
uint16_t etype;
bool isipv6;
KASSERT(hdr->flags &
(VIRTIO_NET_HDR_F_NEEDS_CSUM | VIRTIO_NET_HDR_F_DATA_VALID),
("%s: missing checksum offloading flag %x", __func__, hdr->flags));
eh = mtod(m, const struct ether_header *);
etype = ntohs(eh->ether_type);
if (etype == ETHERTYPE_VLAN) {
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);
sc = rxq->vtnrx_sc;
switch (etype) {
#if defined(INET)
case ETHERTYPE_IP:
if (__predict_false(m->m_len < hoff + sizeof(struct ip))) {
sc->vtnet_stats.rx_csum_inaccessible_ipproto++;
return (1);
} else {
struct ip *ip = (struct ip *)(m->m_data + hoff);
protocol = ip->ip_p;
}
isipv6 = false;
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) {
sc->vtnet_stats.rx_csum_inaccessible_ipproto++;
return (1);
}
isipv6 = true;
break;
#endif
default:
sc->vtnet_stats.rx_csum_bad_ethtype++;
return (1);
}
switch (protocol) {
case IPPROTO_TCP:
case IPPROTO_UDP:
break;
default:
sc->vtnet_stats.rx_csum_bad_ipproto++;
return (1);
}
if (hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM)
return (vtnet_rxq_csum_needs_csum(rxq, m, isipv6, protocol,
hdr));
else
vtnet_rxq_csum_data_valid(rxq, m, protocol);
return (0);
}
#endif
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 __diagused;
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;
if_t ifp;
sc = rxq->vtnrx_sc;
ifp = sc->vtnet_ifp;
if (if_getcapenable(ifp) & IFCAP_VLAN_HWTAGGING) {
struct ether_header *eh = mtod(m, struct ether_header *);
if (eh->ether_type == htons(ETHERTYPE_VLAN)) {
vtnet_vlan_tag_remove(m);
if (hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM)
hdr->csum_start -= ETHER_VLAN_ENCAP_LEN;
}
}
if (sc->vtnet_act_vq_pairs == 1) {
M_HASHTYPE_CLEAR(m);
} else {
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 defined(INET) || defined(INET6)
if (vtnet_rxq_csum(rxq, m, hdr) == 0)
rxq->vtnrx_stats.vrxs_csum++;
else
rxq->vtnrx_stats.vrxs_csum_failed++;
#else
sc->vtnet_stats.rx_csum_bad_ethtype++;
rxq->vtnrx_stats.vrxs_csum_failed++;
#endif
}
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) && if_getcapenable(ifp) & IFCAP_LRO) {
if (vtnet_lro_rx(rxq, m) == 0)
return;
}
#endif
if_input(ifp, m);
}
static int
vtnet_rxq_eof(struct vtnet_rxq *rxq)
{
struct virtio_net_hdr lhdr, *hdr;
struct vtnet_softc *sc;
if_t 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);
CURVNET_SET(if_getvnet(ifp));
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 *);
kmsan_mark(mhdr, sizeof(*mhdr), KMSAN_STATE_INITED);
nbufs = vtnet_htog16(sc, mhdr->num_buffers);
adjsz = sizeof(struct virtio_net_hdr_mrg_rxbuf);
} else if (vtnet_modern(sc)) {
nbufs = 1;
adjsz = sizeof(struct virtio_net_hdr_v1);
} else {
nbufs = 1;
adjsz = sizeof(struct vtnet_rx_header);
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) {
if (vtnet_rxq_merged_eof(rxq, m, nbufs) != 0)
continue;
}
kmsan_mark_mbuf(m, KMSAN_STATE_INITED);
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_mbuf_in(sc->vtnet_pfil, &m, ifp, NULL);
switch (pfil) {
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);
}
CURVNET_RESTORE();
return (count > 0 ? 0 : EAGAIN);
}
static void
vtnet_rx_vq_process(struct vtnet_rxq *rxq, int tries)
{
struct vtnet_softc *sc;
if_t ifp;
u_int more;
#ifdef DEV_NETMAP
int nmirq;
#endif
sc = rxq->vtnrx_sc;
ifp = sc->vtnet_ifp;
if (__predict_false(rxq->vtnrx_id >= sc->vtnet_act_vq_pairs)) {
vtnet_rxq_disable_intr(rxq);
return;
}
VTNET_RXQ_LOCK(rxq);
#ifdef DEV_NETMAP
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
again:
if ((if_getdrvflags(ifp) & 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);
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;
threshold = virtqueue_size(txq->vtntx_vq) / 4;
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);
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
void *kring = NULL;
#endif
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));
}
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;
#if defined(INET) || defined(INET6)
int offset;
#endif
sc = txq->vtntx_sc;
evh = mtod(m, struct ether_vlan_header *);
if (evh->evl_encap_proto == htons(ETHERTYPE_VLAN)) {
*etype = ntohs(evh->evl_proto);
#if defined(INET) || defined(INET6)
offset = sizeof(struct ether_vlan_header);
#endif
} else {
*etype = ntohs(evh->evl_encap_proto);
#if defined(INET) || defined(INET6)
offset = sizeof(struct ether_header);
#endif
}
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);
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_get_flags(tcp) & TH_CWR)) {
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)) {
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)) {
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) {
sc->vtnet_stats.tx_defrag_failed++;
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:
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);
}
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);
}
static void
vtnet_start_locked(struct vtnet_txq *txq, if_t 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 ((if_getdrvflags(ifp) & IFF_DRV_RUNNING) == 0 ||
sc->vtnet_link_active == 0)
return;
vtnet_txq_eof(txq);
again:
enq = 0;
while (!if_sendq_empty(ifp)) {
if (virtqueue_full(vq))
break;
m0 = if_dequeue(ifp);
if (m0 == NULL)
break;
if (vtnet_txq_encap(txq, &m0, M_NOWAIT) != 0) {
if (m0 != NULL)
if_sendq_prepend(ifp, 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(if_t ifp)
{
struct vtnet_softc *sc;
struct vtnet_txq *txq;
sc = if_getsoftc(ifp);
txq = &sc->vtnet_txqs[0];
VTNET_TXQ_LOCK(txq);
vtnet_start_locked(txq, ifp);
VTNET_TXQ_UNLOCK(txq);
}
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;
if_t 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 ((if_getdrvflags(ifp) & 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(if_t ifp, struct mbuf *m)
{
struct vtnet_softc *sc;
struct vtnet_txq *txq;
int i, npairs, error;
sc = if_getsoftc(ifp);
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);
}
static void
vtnet_txq_start(struct vtnet_txq *txq)
{
struct vtnet_softc *sc;
if_t ifp;
sc = txq->vtntx_sc;
ifp = sc->vtnet_ifp;
if (!VTNET_ALTQ_ENABLED) {
if (!drbr_empty(ifp, txq->vtntx_br))
vtnet_txq_mq_start_locked(txq, NULL);
} else {
if (!if_sendq_empty(ifp))
vtnet_start_locked(txq, ifp);
}
}
static void
vtnet_txq_tq_intr(void *xtxq, int pending __unused)
{
struct vtnet_softc *sc;
struct vtnet_txq *txq;
if_t ifp;
txq = xtxq;
sc = txq->vtntx_sc;
ifp = sc->vtnet_ifp;
VTNET_TXQ_LOCK(txq);
if ((if_getdrvflags(ifp) & 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;
if_t ifp;
txq = xtxq;
sc = txq->vtntx_sc;
ifp = sc->vtnet_ifp;
if (__predict_false(txq->vtntx_id >= sc->vtnet_act_vq_pairs)) {
vtnet_txq_disable_intr(txq);
return;
}
#ifdef DEV_NETMAP
if (netmap_tx_irq(ifp, txq->vtntx_id) != NM_IRQ_PASS)
return;
#endif
VTNET_TXQ_LOCK(txq);
if ((if_getdrvflags(ifp) & 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);
}
}
static void
vtnet_qflush(if_t ifp)
{
struct vtnet_softc *sc;
struct vtnet_txq *txq;
struct mbuf *m;
int i;
sc = if_getsoftc(ifp);
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);
}
static int
vtnet_watchdog(struct vtnet_txq *txq)
{
if_t ifp;
ifp = txq->vtntx_sc->vtnet_ifp;
VTNET_TXQ_LOCK(txq);
if (txq->vtntx_watchdog == 1) {
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_IBYTES:
return (rxaccum.vrxs_ibytes);
case IFCOUNTER_OPACKETS:
return (txaccum.vtxs_opackets);
case IFCOUNTER_OBYTES:
return (txaccum.vtxs_obytes);
case IFCOUNTER_OMCASTS:
return (txaccum.vtxs_omcasts);
default:
return (if_get_counter_default(ifp, cnt));
}
}
static void
vtnet_tick(void *xsc)
{
struct vtnet_softc *sc;
if_t 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) {
if_setdrvflagbits(ifp, 0, 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;
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);
if (!VTNET_ALTQ_ENABLED)
taskqueue_drain(txq->vtntx_tq, &txq->vtntx_defrtask);
}
}
}
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);
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;
if_t ifp;
dev = sc->vtnet_dev;
ifp = sc->vtnet_ifp;
VTNET_CORE_LOCK_ASSERT(sc);
if_setdrvflagbits(ifp, 0, IFF_DRV_RUNNING);
sc->vtnet_link_active = 0;
callout_stop(&sc->vtnet_tick_ch);
vtnet_disable_interrupts(sc);
#ifdef DEV_NETMAP
netmap_disable_all_rings(ifp);
#endif
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;
if_t ifp;
uint64_t features;
int error;
dev = sc->vtnet_dev;
ifp = sc->vtnet_ifp;
features = sc->vtnet_negotiated_features;
if ((if_getcapenable(ifp) & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6)) == 0)
features &= ~(VIRTIO_NET_F_GUEST_CSUM | VTNET_LRO_FEATURES);
if ((if_getcapenable(ifp) & IFCAP_LRO) == 0)
features &= ~VTNET_LRO_FEATURES;
if ((if_getcapenable(ifp) & 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)
{
if_t ifp;
ifp = sc->vtnet_ifp;
if (sc->vtnet_flags & VTNET_FLAG_CTRL_RX) {
vtnet_rx_filter(sc);
vtnet_rx_filter_mac(sc);
}
if (if_getcapenable(ifp) & IFCAP_VLAN_HWFILTER)
vtnet_rx_filter_vlan(sc);
}
static int
vtnet_init_rx_queues(struct vtnet_softc *sc)
{
device_t dev;
if_t ifp;
struct vtnet_rxq *rxq;
int i, clustersz, error;
dev = sc->vtnet_dev;
ifp = sc->vtnet_ifp;
clustersz = vtnet_rx_cluster_size(sc, if_getmtu(ifp));
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];
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
}
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)
{
if_t ifp;
uint64_t features;
int error;
ifp = sc->vtnet_ifp;
features = sc->vtnet_features;
VTNET_CORE_LOCK_ASSERT(sc);
if (if_getcapabilities(ifp) & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6)) {
if (if_getcapenable(ifp) & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6))
features |= VIRTIO_NET_F_GUEST_CSUM;
else
features &= ~VIRTIO_NET_F_GUEST_CSUM;
}
if (if_getcapabilities(ifp) & IFCAP_LRO && !vtnet_software_lro(sc)) {
if (if_getcapenable(ifp) & 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 (if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
if_setdrvflagbits(ifp, 0, IFF_DRV_RUNNING);
vtnet_init_locked(sc, 0);
}
} else
sc->vtnet_features = features;
}
static int
vtnet_reinit(struct vtnet_softc *sc)
{
if_t ifp;
int error;
ifp = sc->vtnet_ifp;
bcopy(if_getlladdr(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);
if_sethwassist(ifp, 0);
if (if_getcapenable(ifp) & IFCAP_TXCSUM)
if_sethwassistbits(ifp, VTNET_CSUM_OFFLOAD, 0);
if (if_getcapenable(ifp) & IFCAP_TXCSUM_IPV6)
if_sethwassistbits(ifp, VTNET_CSUM_OFFLOAD_IPV6, 0);
if (if_getcapenable(ifp) & IFCAP_TSO4)
if_sethwassistbits(ifp, CSUM_IP_TSO, 0);
if (if_getcapenable(ifp) & IFCAP_TSO6)
if_sethwassistbits(ifp, CSUM_IP6_TSO, 0);
error = vtnet_init_rxtx_queues(sc);
if (error)
return (error);
return (0);
}
static void
vtnet_init_locked(struct vtnet_softc *sc, int init_mode)
{
if_t ifp;
ifp = sc->vtnet_ifp;
VTNET_CORE_LOCK_ASSERT(sc);
if (if_getdrvflags(ifp) & IFF_DRV_RUNNING)
return;
vtnet_stop(sc);
#ifdef DEV_NETMAP
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
if (vtnet_reinit(sc) != 0) {
vtnet_stop(sc);
return;
}
if_setdrvflagbits(ifp, IFF_DRV_RUNNING, 0);
vtnet_update_link_status(sc);
vtnet_enable_interrupts(sc);
callout_reset(&sc->vtnet_tick_ch, hz, vtnet_tick, sc);
#ifdef DEV_NETMAP
netmap_enable_all_rings(ifp);
#endif
}
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)
{
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;
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;
if_t ifp;
dev = sc->vtnet_dev;
ifp = sc->vtnet_ifp;
VTNET_CORE_LOCK_ASSERT(sc);
if (vtnet_set_promisc(sc, if_getflags(ifp) & IFF_PROMISC) != 0) {
device_printf(dev, "cannot %s promiscuous mode\n",
if_getflags(ifp) & IFF_PROMISC ? "enable" : "disable");
}
if (vtnet_set_allmulti(sc, if_getflags(ifp) & IFF_ALLMULTI) != 0) {
device_printf(dev, "cannot %s all-multicast mode\n",
if_getflags(ifp) & 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;
if_t 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);
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);
}
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 && vtnet_set_promisc(sc, true) != 0)
if_printf(ifp, "cannot enable promiscuous mode\n");
if (allmulti && 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);
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)
{
if_t 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 (if_getcapenable(ifp) & IFCAP_VLAN_HWFILTER &&
if_getdrvflags(ifp) & 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, if_t ifp, uint16_t tag)
{
if (if_getsoftc(ifp) != arg)
return;
vtnet_update_vlan_filter(arg, 1, tag);
}
static void
vtnet_unregister_vlan(void *arg, if_t ifp, uint16_t tag)
{
if (if_getsoftc(ifp) != arg)
return;
vtnet_update_vlan_filter(arg, 0, tag);
}
static void
vtnet_update_speed_duplex(struct vtnet_softc *sc)
{
if_t ifp;
uint32_t speed;
ifp = sc->vtnet_ifp;
if ((sc->vtnet_features & VIRTIO_NET_F_SPEED_DUPLEX) == 0)
return;
speed = virtio_read_dev_config_4(sc->vtnet_dev,
offsetof(struct virtio_net_config, speed));
if (speed != UINT32_MAX)
if_setbaudrate(ifp, 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)
{
if_t ifp;
int link;
ifp = sc->vtnet_ifp;
VTNET_CORE_LOCK_ASSERT(sc);
link = vtnet_is_link_up(sc);
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(if_t ifp __unused)
{
return (EOPNOTSUPP);
}
static void
vtnet_ifmedia_sts(if_t ifp, struct ifmediareq *ifmr)
{
struct vtnet_softc *sc;
sc = if_getsoftc(ifp);
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 {
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;
}
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)
{
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;
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 | CTLFLAG_STATS,
&stats->vrxs_ipackets, "Receive packets");
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "ibytes",
CTLFLAG_RD | CTLFLAG_STATS,
&stats->vrxs_ibytes, "Receive bytes");
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "iqdrops",
CTLFLAG_RD | CTLFLAG_STATS,
&stats->vrxs_iqdrops, "Receive drops");
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "ierrors",
CTLFLAG_RD | CTLFLAG_STATS,
&stats->vrxs_ierrors, "Receive errors");
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "csum",
CTLFLAG_RD | CTLFLAG_STATS,
&stats->vrxs_csum, "Receive checksum offloaded");
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "csum_failed",
CTLFLAG_RD | CTLFLAG_STATS,
&stats->vrxs_csum_failed, "Receive checksum offload failed");
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "host_lro",
CTLFLAG_RD | CTLFLAG_STATS,
&stats->vrxs_host_lro, "Receive host segmentation offloaded");
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "rescheduled",
CTLFLAG_RD | CTLFLAG_STATS,
&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 | CTLFLAG_STATS,
&stats->vtxs_opackets, "Transmit packets");
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "obytes",
CTLFLAG_RD | CTLFLAG_STATS,
&stats->vtxs_obytes, "Transmit bytes");
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "omcasts",
CTLFLAG_RD | CTLFLAG_STATS,
&stats->vtxs_omcasts, "Transmit multicasts");
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "csum",
CTLFLAG_RD | CTLFLAG_STATS,
&stats->vtxs_csum, "Transmit checksum offloaded");
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "tso",
CTLFLAG_RD | CTLFLAG_STATS,
&stats->vtxs_tso, "Transmit TCP segmentation offloaded");
SYSCTL_ADD_UQUAD(ctx, list, OID_AUTO, "rescheduled",
CTLFLAG_RD | CTLFLAG_STATS,
&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 int
vtnet_sysctl_rx_csum_failed(SYSCTL_HANDLER_ARGS)
{
struct vtnet_softc *sc = (struct vtnet_softc *)arg1;
struct vtnet_statistics *stats = &sc->vtnet_stats;
struct vtnet_rxq_stats *rxst;
int i;
stats->rx_csum_failed = 0;
for (i = 0; i < sc->vtnet_max_vq_pairs; i++) {
rxst = &sc->vtnet_rxqs[i].vtnrx_stats;
stats->rx_csum_failed += rxst->vrxs_csum_failed;
}
return (sysctl_handle_64(oidp, NULL, stats->rx_csum_failed, req));
}
static int
vtnet_sysctl_rx_csum_offloaded(SYSCTL_HANDLER_ARGS)
{
struct vtnet_softc *sc = (struct vtnet_softc *)arg1;
struct vtnet_statistics *stats = &sc->vtnet_stats;
struct vtnet_rxq_stats *rxst;
int i;
stats->rx_csum_offloaded = 0;
for (i = 0; i < sc->vtnet_max_vq_pairs; i++) {
rxst = &sc->vtnet_rxqs[i].vtnrx_stats;
stats->rx_csum_offloaded += rxst->vrxs_csum;
}
return (sysctl_handle_64(oidp, NULL, stats->rx_csum_offloaded, req));
}
static int
vtnet_sysctl_rx_task_rescheduled(SYSCTL_HANDLER_ARGS)
{
struct vtnet_softc *sc = (struct vtnet_softc *)arg1;
struct vtnet_statistics *stats = &sc->vtnet_stats;
struct vtnet_rxq_stats *rxst;
int i;
stats->rx_task_rescheduled = 0;
for (i = 0; i < sc->vtnet_max_vq_pairs; i++) {
rxst = &sc->vtnet_rxqs[i].vtnrx_stats;
stats->rx_task_rescheduled += rxst->vrxs_rescheduled;
}
return (sysctl_handle_64(oidp, NULL, stats->rx_task_rescheduled, req));
}
static int
vtnet_sysctl_tx_csum_offloaded(SYSCTL_HANDLER_ARGS)
{
struct vtnet_softc *sc = (struct vtnet_softc *)arg1;
struct vtnet_statistics *stats = &sc->vtnet_stats;
struct vtnet_txq_stats *txst;
int i;
stats->tx_csum_offloaded = 0;
for (i = 0; i < sc->vtnet_max_vq_pairs; i++) {
txst = &sc->vtnet_txqs[i].vtntx_stats;
stats->tx_csum_offloaded += txst->vtxs_csum;
}
return (sysctl_handle_64(oidp, NULL, stats->tx_csum_offloaded, req));
}
static int
vtnet_sysctl_tx_tso_offloaded(SYSCTL_HANDLER_ARGS)
{
struct vtnet_softc *sc = (struct vtnet_softc *)arg1;
struct vtnet_statistics *stats = &sc->vtnet_stats;
struct vtnet_txq_stats *txst;
int i;
stats->tx_tso_offloaded = 0;
for (i = 0; i < sc->vtnet_max_vq_pairs; i++) {
txst = &sc->vtnet_txqs[i].vtntx_stats;
stats->tx_tso_offloaded += txst->vtxs_tso;
}
return (sysctl_handle_64(oidp, NULL, stats->tx_tso_offloaded, req));
}
static int
vtnet_sysctl_tx_task_rescheduled(SYSCTL_HANDLER_ARGS)
{
struct vtnet_softc *sc = (struct vtnet_softc *)arg1;
struct vtnet_statistics *stats = &sc->vtnet_stats;
struct vtnet_txq_stats *txst;
int i;
stats->tx_task_rescheduled = 0;
for (i = 0; i < sc->vtnet_max_vq_pairs; i++) {
txst = &sc->vtnet_txqs[i].vtntx_stats;
stats->tx_task_rescheduled += txst->vtxs_rescheduled;
}
return (sysctl_handle_64(oidp, NULL, stats->tx_task_rescheduled, req));
}
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 | CTLFLAG_STATS, &stats->mbuf_alloc_failed,
"Mbuf cluster allocation failures");
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_frame_too_large",
CTLFLAG_RD | CTLFLAG_STATS, &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 | CTLFLAG_STATS, &stats->rx_enq_replacement_failed,
"Enqueuing the replacement receive mbuf failed");
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_mergeable_failed",
CTLFLAG_RD | CTLFLAG_STATS, &stats->rx_mergeable_failed,
"Mergeable buffers receive failures");
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_csum_bad_ethtype",
CTLFLAG_RD | CTLFLAG_STATS, &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 | CTLFLAG_STATS, &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 | CTLFLAG_STATS, &stats->rx_csum_bad_offset,
"Received checksum offloaded buffer with incorrect offset");
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_csum_inaccessible_ipproto",
CTLFLAG_RD | CTLFLAG_STATS, &stats->rx_csum_inaccessible_ipproto,
"Received checksum offloaded buffer with inaccessible IP protocol");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "rx_csum_failed",
CTLTYPE_U64 | CTLFLAG_RD | CTLFLAG_STATS,
sc, 0, vtnet_sysctl_rx_csum_failed, "QU",
"Received buffer checksum offload failed");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "rx_csum_offloaded",
CTLTYPE_U64 | CTLFLAG_RD | CTLFLAG_STATS,
sc, 0, vtnet_sysctl_rx_csum_offloaded, "QU",
"Received buffer checksum offload succeeded");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "rx_task_rescheduled",
CTLTYPE_U64 | CTLFLAG_RD | CTLFLAG_STATS,
sc, 0, vtnet_sysctl_rx_task_rescheduled, "QU",
"Times the receive interrupt task rescheduled itself");
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_csum_unknown_ethtype",
CTLFLAG_RD | CTLFLAG_STATS, &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 | CTLFLAG_STATS, &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 | CTLFLAG_STATS, &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 | CTLFLAG_STATS, &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 | CTLFLAG_STATS, &stats->tx_defragged,
"Transmit mbufs defragged");
SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_defrag_failed",
CTLFLAG_RD | CTLFLAG_STATS, &stats->tx_defrag_failed,
"Aborted transmit of buffer because defrag failed");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "tx_csum_offloaded",
CTLTYPE_U64 | CTLFLAG_RD | CTLFLAG_STATS,
sc, 0, vtnet_sysctl_tx_csum_offloaded, "QU",
"Offloaded checksum of transmitted buffer");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "tx_tso_offloaded",
CTLTYPE_U64 | CTLFLAG_RD | CTLFLAG_STATS,
sc, 0, vtnet_sysctl_tx_tso_offloaded, "QU",
"Segmentation offload of transmitted buffer");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "tx_task_rescheduled",
CTLTYPE_U64 | CTLFLAG_RD | CTLFLAG_STATS,
sc, 0, vtnet_sysctl_tx_task_rescheduled, "QU",
"Times the transmit interrupt task rescheduled itself");
}
static int
vtnet_sysctl_features(SYSCTL_HANDLER_ARGS)
{
struct sbuf sb;
struct vtnet_softc *sc = (struct vtnet_softc *)arg1;
int error;
sbuf_new_for_sysctl(&sb, NULL, 0, req);
sbuf_printf(&sb, "%b", (uint32_t)sc->vtnet_features,
VIRTIO_NET_FEATURE_BITS);
error = sbuf_finish(&sb);
sbuf_delete(&sb);
return (error);
}
static int
vtnet_sysctl_flags(SYSCTL_HANDLER_ARGS)
{
struct sbuf sb;
struct vtnet_softc *sc = (struct vtnet_softc *)arg1;
int error;
sbuf_new_for_sysctl(&sb, NULL, 0, req);
sbuf_printf(&sb, "%b", sc->vtnet_flags, VTNET_FLAGS_BITS);
error = sbuf_finish(&sb);
sbuf_delete(&sb);
return (error);
}
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");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "features",
CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
vtnet_sysctl_features, "A", "Features");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "flags",
CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
vtnet_sysctl_flags, "A", "Flags");
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));
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(if_t 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(if_t ifp __unused, enum debugnet_ev event)
{
struct vtnet_softc *sc;
static bool sw_lro_enabled = false;
sc = if_getsoftc(ifp);
switch (event) {
case DEBUGNET_START:
sw_lro_enabled = (sc->vtnet_flags & VTNET_FLAG_SW_LRO) != 0;
if (sw_lro_enabled)
sc->vtnet_flags &= ~VTNET_FLAG_SW_LRO;
break;
case DEBUGNET_END:
if (sw_lro_enabled)
sc->vtnet_flags |= VTNET_FLAG_SW_LRO;
break;
}
}
static int
vtnet_debugnet_transmit(if_t 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(if_t 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
