IB_RATE_1600_GBPS
case IB_RATE_1600_GBPS: return 640;
case 640: return IB_RATE_1600_GBPS;
case IB_RATE_1600_GBPS: return 1700000;
rate == IB_RATE_1600_GBPS)
if (rate < IB_RATE_2_5_GBPS || rate > IB_RATE_1600_GBPS)