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Implement virtio_net link status (Mark McLoughlin)

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Implement the VIRTIO_NET_F_STATUS feature by exposing the link status
through virtio_net_config::status.

Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6250 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aliguori 2009-01-08 19:46:33 +00:00
parent 99ed7e30cb
commit 554c97dd43
2 changed files with 27 additions and 3 deletions
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23
hw/virtio-net.c
View File

@ -20,6 +20,7 @@ typedef struct VirtIONet
{
VirtIODevice vdev;
uint8_t mac[6];
uint16_t status;
VirtQueue *rx_vq;
VirtQueue *tx_vq;
VLANClientState *vc;
@ -42,13 +43,28 @@ static void virtio_net_update_config(VirtIODevice *vdev, uint8_t *config)
VirtIONet *n = to_virtio_net(vdev);
struct virtio_net_config netcfg;
netcfg.status = n->status;
memcpy(netcfg.mac, n->mac, 6);
memcpy(config, &netcfg, sizeof(netcfg));
}
static void virtio_net_set_link_status(VLANClientState *vc)
{
VirtIONet *n = vc->opaque;
uint16_t old_status = n->status;
if (vc->link_down)
n->status &= ~VIRTIO_NET_S_LINK_UP;
else
n->status |= VIRTIO_NET_S_LINK_UP;
if (n->status != old_status)
virtio_notify_config(&n->vdev);
}
static uint32_t virtio_net_get_features(VirtIODevice *vdev)
{
uint32_t features = (1 << VIRTIO_NET_F_MAC);
uint32_t features = (1 << VIRTIO_NET_F_MAC) | (1 << VIRTIO_NET_F_STATUS);
return features;
}
@ -307,7 +323,8 @@ PCIDevice *virtio_net_init(PCIBus *bus, NICInfo *nd, int devfn)
n = (VirtIONet *)virtio_init_pci(bus, "virtio-net", 6900, 0x1000,
0, VIRTIO_ID_NET,
0x02, 0x00, 0x00,
6, sizeof(VirtIONet));
sizeof(struct virtio_net_config),
sizeof(VirtIONet));
if (!n)
return NULL;
@ -317,8 +334,10 @@ PCIDevice *virtio_net_init(PCIBus *bus, NICInfo *nd, int devfn)
n->rx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_rx);
n->tx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_tx);
memcpy(n->mac, nd->macaddr, 6);
n->status = VIRTIO_NET_S_LINK_UP;
n->vc = qemu_new_vlan_client(nd->vlan, nd->model, nd->name,
virtio_net_receive, virtio_net_can_receive, n);
n->vc->link_status_changed = virtio_net_set_link_status;
qemu_format_nic_info_str(n->vc, n->mac);

7
hw/virtio-net.h
View File

@ -37,16 +37,21 @@
#define VIRTIO_NET_F_HOST_ECN 13 /* Host can handle TSO[6] w/ ECN in. */
#define VIRTIO_NET_F_HOST_UFO 14 /* Host can handle UFO in. */
#define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */
#define VIRTIO_NET_F_STATUS 16 /* virtio_net_config.status available */
#define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
#define TX_TIMER_INTERVAL 150000 /* 150 us */
/* Maximum packet size we can receive from tap device: header + 64k */
#define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10))
/* The config defining mac address (6 bytes) */
struct virtio_net_config
{
/* The config defining mac address (6 bytes) */
uint8_t mac[6];
/* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */
uint16_t status;
} __attribute__((packed));
/* This is the first element of the scatter-gather list. If you don't