Thanks Ferbs.
I found that RDS driver source has been integrated into MLNX_OFED, even though RDS is not tested and supported by Mellanox.
Besides, the driver code is always updated in the latest version of MLNX_OFED such as MLNX_OFED_LINUX-3.1-1.0.0-rhel6.5-x86_64, which is more newer than it in the latest version of Linux kernel-4.2.5/net/rds.
So what is the resource and motion to update RDS driver for MLNX_OFED?
Thanks for your help.