We are working on T4240QDS rev 1 machine.
The current SerDes configuration that we are using is
SerDes protocol 1: 1
SerDes protocol 2: 28
SerDes protocol 3: 6
SerDes protocol 4: 12
To configure the PCI as an x8 slot we chose the values
(SRDS_PRTCL_S3 = 2 and SRDS_PRTCL_S4 = 4).
The inserted card was then booted, the kernel logs showed that the slot was still detected as a x4 slot.
Portion of the Logs:
MAC: 2, PHY: 15, SFP+: 6, PBA No: Unknown
PCI-Express bandwidth available for this card is not sufficient for optimal performance.
For optimal performance a x8 PCI-Express slot is required
How do I configure the slot (Slot 7) as a x8 slot?