Hi TI Lady,
TI has released the SRIO driver and example projects along with MCSDK for Keystone I devices. Please download the latest MCSDK from below link.
http://software-dl.ti.com/sdoemb/sdoemb_public_sw/bios_mcsdk/latest/index_FDS.html
Driver: ..\pdk_C6657_1_1_2_6\packages\ti\drv\srio
Examples: ..\pdk_C6657_1_1_2_6\packages\ti\drv\exampleProjects
If the MCSDK driver and example does not help you to solve the issue then provide more information about the issue.
Do you use C6657 EVM or custom board?
Is it a custom SRIO driver?
What are all the steps followed for debug the issue?
How the FPGA srio core is validated?
Have you executed the loopback test? etc
Thanks.