66AK2H06: Initialization of PCIe Serdes

Part Number:66AK2H06

Hi,

My customer have questions about 66AK2H06 PCIe Serdes and want to know
the details of PCIe serdes initialization.

In the last released RTOS SDK v05.02.00.10, there are function "csl_wiz8_sb_refclk100MHz_pci_5Gbps"
which is written in source file csl_wiz8_sb_refclk100MHz_pci_5Gbps.c
I guess this function is setting the value to PCIe Serdes registers.

Q1. 
Is this function must be called from initialization function of PCIe serdes in customer's code?
If yes, are the value of registers must not be modified by the user?

Q2.
They want to know the details of each registers which are setup in the above function.
Because they need the detail if any issue of PCIe happened.
Is it available to provide us the details?

best regards,
g.f.