E1000_P2VMAILBOX_PFU
wr32(E1000_P2VMAILBOX(vf_number), E1000_P2VMAILBOX_PFU);
if (p2v_mailbox & E1000_P2VMAILBOX_PFU) {
if (p2v_mailbox & E1000_P2VMAILBOX_PFU)
p2v_mailbox & ~E1000_P2VMAILBOX_PFU);
E1000_P2VMAILBOX_ACK | E1000_P2VMAILBOX_PFU);