diff options
| -rw-r--r-- | hw/net/virtio-net.c | 42 | ||||
| -rw-r--r-- | include/hw/i386/pc.h | 5 | ||||
| -rw-r--r-- | include/hw/virtio/virtio-net.h | 17 |
3 files changed, 64 insertions, 0 deletions
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c index 0a34a8b..318b033 100644 --- a/hw/net/virtio-net.c +++ b/hw/net/virtio-net.c @@ -99,6 +99,16 @@ static bool virtio_net_started(VirtIONet *n, uint8_t status) (n->status & VIRTIO_NET_S_LINK_UP) && vdev->vm_running; } +static void virtio_net_announce_timer(void *opaque) +{ + VirtIONet *n = opaque; + VirtIODevice *vdev = VIRTIO_DEVICE(n); + + n->announce_counter--; + n->status |= VIRTIO_NET_S_ANNOUNCE; + virtio_notify_config(vdev); +} + static void virtio_net_vhost_status(VirtIONet *n, uint8_t status) { VirtIODevice *vdev = VIRTIO_DEVICE(n); @@ -322,6 +332,9 @@ static void virtio_net_reset(VirtIODevice *vdev) n->nobcast = 0; /* multiqueue is disabled by default */ n->curr_queues = 1; + timer_del(n->announce_timer); + n->announce_counter = 0; + n->status &= ~VIRTIO_NET_S_ANNOUNCE; /* Flush any MAC and VLAN filter table state */ n->mac_table.in_use = 0; @@ -731,6 +744,23 @@ static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd, return VIRTIO_NET_OK; } +static int virtio_net_handle_announce(VirtIONet *n, uint8_t cmd, + struct iovec *iov, unsigned int iov_cnt) +{ + if (cmd == VIRTIO_NET_CTRL_ANNOUNCE_ACK && + n->status & VIRTIO_NET_S_ANNOUNCE) { + n->status &= ~VIRTIO_NET_S_ANNOUNCE; + if (n->announce_counter) { + timer_mod(n->announce_timer, + qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + + self_announce_delay(n->announce_counter)); + } + return VIRTIO_NET_OK; + } else { + return VIRTIO_NET_ERR; + } +} + static int virtio_net_handle_mq(VirtIONet *n, uint8_t cmd, struct iovec *iov, unsigned int iov_cnt) { @@ -794,6 +824,8 @@ static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) status = virtio_net_handle_mac(n, ctrl.cmd, iov, iov_cnt); } else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) { status = virtio_net_handle_vlan_table(n, ctrl.cmd, iov, iov_cnt); + } else if (ctrl.class == VIRTIO_NET_CTRL_ANNOUNCE) { + status = virtio_net_handle_announce(n, ctrl.cmd, iov, iov_cnt); } else if (ctrl.class == VIRTIO_NET_CTRL_MQ) { status = virtio_net_handle_mq(n, ctrl.cmd, iov, iov_cnt); } else if (ctrl.class == VIRTIO_NET_CTRL_GUEST_OFFLOADS) { @@ -1451,6 +1483,12 @@ static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) qemu_get_subqueue(n->nic, i)->link_down = link_down; } + if (vdev->guest_features & (0x1 << VIRTIO_NET_F_GUEST_ANNOUNCE) && + vdev->guest_features & (0x1 << VIRTIO_NET_F_CTRL_VQ)) { + n->announce_counter = SELF_ANNOUNCE_ROUNDS; + timer_mod(n->announce_timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL)); + } + return 0; } @@ -1553,6 +1591,8 @@ static void virtio_net_device_realize(DeviceState *dev, Error **errp) qemu_macaddr_default_if_unset(&n->nic_conf.macaddr); memcpy(&n->mac[0], &n->nic_conf.macaddr, sizeof(n->mac)); n->status = VIRTIO_NET_S_LINK_UP; + n->announce_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, + virtio_net_announce_timer, n); if (n->netclient_type) { /* @@ -1629,6 +1669,8 @@ static void virtio_net_device_unrealize(DeviceState *dev, Error **errp) } } + timer_del(n->announce_timer); + timer_free(n->announce_timer); g_free(n->vqs); qemu_del_nic(n->nic); virtio_cleanup(vdev); diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h index 2e6ac04..a9529f4 100644 --- a/include/hw/i386/pc.h +++ b/include/hw/i386/pc.h @@ -351,6 +351,11 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *); .driver = "pci-serial-4x",\ .property = "prog_if",\ .value = stringify(0),\ + },\ + {\ + .driver = "virtio-net-pci",\ + .property = "guest_announce",\ + .value = "off",\ } #define PC_COMPAT_1_7 \ diff --git a/include/hw/virtio/virtio-net.h b/include/hw/virtio/virtio-net.h index 4b32440..f7fccc0 100644 --- a/include/hw/virtio/virtio-net.h +++ b/include/hw/virtio/virtio-net.h @@ -49,12 +49,14 @@ #define VIRTIO_NET_F_CTRL_RX 18 /* Control channel RX mode support */ #define VIRTIO_NET_F_CTRL_VLAN 19 /* Control channel VLAN filtering */ #define VIRTIO_NET_F_CTRL_RX_EXTRA 20 /* Extra RX mode control support */ +#define VIRTIO_NET_F_GUEST_ANNOUNCE 21 /* Guest can announce itself */ #define VIRTIO_NET_F_MQ 22 /* Device supports Receive Flow * Steering */ #define VIRTIO_NET_F_CTRL_MAC_ADDR 23 /* Set MAC address */ #define VIRTIO_NET_S_LINK_UP 1 /* Link is up */ +#define VIRTIO_NET_S_ANNOUNCE 2 /* Announcement is needed */ #define TX_TIMER_INTERVAL 150000 /* 150 us */ @@ -193,6 +195,8 @@ typedef struct VirtIONet { char *netclient_name; char *netclient_type; uint64_t curr_guest_offloads; + QEMUTimer *announce_timer; + int announce_counter; } VirtIONet; #define VIRTIO_NET_CTRL_MAC 1 @@ -213,6 +217,18 @@ typedef struct VirtIONet { #define VIRTIO_NET_CTRL_VLAN_DEL 1 /* + * Control link announce acknowledgement + * + * VIRTIO_NET_S_ANNOUNCE bit in the status field requests link announcement from + * guest driver. The driver is notified by config space change interrupt. The + * command VIRTIO_NET_CTRL_ANNOUNCE_ACK is used to indicate that the driver has + * received the notification. It makes the device clear the bit + * VIRTIO_NET_S_ANNOUNCE in the status field. + */ +#define VIRTIO_NET_CTRL_ANNOUNCE 3 + #define VIRTIO_NET_CTRL_ANNOUNCE_ACK 0 + +/* * Control Multiqueue * * The command VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET @@ -251,6 +267,7 @@ struct virtio_net_ctrl_mq { DEFINE_PROP_BIT("guest_tso6", _state, _field, VIRTIO_NET_F_GUEST_TSO6, true), \ DEFINE_PROP_BIT("guest_ecn", _state, _field, VIRTIO_NET_F_GUEST_ECN, true), \ DEFINE_PROP_BIT("guest_ufo", _state, _field, VIRTIO_NET_F_GUEST_UFO, true), \ + DEFINE_PROP_BIT("guest_announce", _state, _field, VIRTIO_NET_F_GUEST_ANNOUNCE, true), \ DEFINE_PROP_BIT("host_tso4", _state, _field, VIRTIO_NET_F_HOST_TSO4, true), \ DEFINE_PROP_BIT("host_tso6", _state, _field, VIRTIO_NET_F_HOST_TSO6, true), \ DEFINE_PROP_BIT("host_ecn", _state, _field, VIRTIO_NET_F_HOST_ECN, true), \ |