That speed comes from
drivers/net/ethernet/cisco/enic/enic_ethtool.c:enic_get_ksettings.
static int enic_get_ksettings(struct net_device *netdev,
struct ethtool_link_ksettings *ecmd)
{
struct enic *enic = netdev_priv(netdev);
struct ethtool_link_settings *base = &ecmd->base;
ethtool_link_ksettings_add_link_mode(ecmd, supported,
10000baseT_Full);
ethtool_link_ksettings_add_link_mode(ecmd, supported, FIBRE);
ethtool_link_ksettings_add_link_mode(ecmd, advertising,
10000baseT_Full);
ethtool_link_ksettings_add_link_mode(ecmd, advertising, FIBRE);
base->port = PORT_FIBRE;
if (netif_carrier_ok(netdev)) {
base->speed = vnic_dev_port_speed(enic->vdev);
base->duplex = DUPLEX_FULL;
} else {
base->speed = SPEED_UNKNOWN;
base->duplex = DUPLEX_UNKNOWN;
}
base->autoneg = AUTONEG_DISABLE;
return 0;
}
vnic_dev_port_speed comes from the hardware at function
drivers/net/ethernet/cisco/enic/vnic_dev.c:vnic_dev_notify_setcmd.
static int vnic_dev_notify_setcmd(struct vnic_dev *vdev,
void *notify_addr, dma_addr_t notify_pa, u16 intr)
{
u64 a0, a1;
int wait = 1000;
int r;
memset(notify_addr, 0, sizeof(struct vnic_devcmd_notify));
vdev->notify = notify_addr;
vdev->notify_pa = notify_pa;
a0 = (u64)notify_pa;
a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
a1 += sizeof(struct vnic_devcmd_notify);
r = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
vdev->notify_sz = (r == 0) ? (u32)a1 : 0;
return r;
}
struct vnic_devcmd_notify {
u32 csum; /* checksum over following words */
u32 link_state; /* link up == 1 */
u32 port_speed; /* effective port speed (rate limit) */
u32 mtu; /* MTU */
u32 msglvl; /* requested driver msg lvl */
u32 uif; /* uplink interface */
u32 status; /* status bits (see VNIC_STF_*) */
u32 error; /* error code (see ERR_*) for first ERR */
u32 link_down_cnt; /* running count of link down transitions */
u32 perbi_rebuild_cnt; /* running count of perbi rebuilds */
};
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https://bugs.launchpad.net/bugs/1881821
Title:
Kernel does not report interface speed correctly for Cisco UCS B200 M5
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