VMXNET3_REG_VRRS
ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_VRRS);
VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_VRRS, 1 << i);
buf[j++] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_VRRS);