bf-sde-9.7.0 on Newport (Tofino2) — FPGA not detected on PCIe, platform init fails

P4 Dev
1

Platform: Intel Newport (Accton AS9516-32D), Tofino2, Ubuntu 20.04, kernel 5.4.0-128

Problem: After installing bf-sde-9.7.0 with newport+asic+tofino2 profile, switchd fails with:

BF_PLTFM ERROR - Error in opening /dev/bf_fpga_0
BF_PLTFM ERROR - Error in fpga initialization
BF_PLTFM ERROR - pltfm_mgr: platform init failed

Root cause found: lspci | grep 1d1c returns nothing — both the FPGA (0x1d1c:0x01F0) and Tofino2 ASIC are not visible on the PCIe bus. The bf_fpga kernel module loads successfully but creates no /dev/bf_fpga_0 because it finds no FPGA on PCIe.

What works:

  • BMC is reachable via CDC ethernet (enx020000000002)
  • EEPROM data from BMC reads successfully (board identified as Newport)
  • All kernel modules load: bf_kdrv, bf_fpga, cdc_ether
  • P4 program compiles successfully

Question: What initializes the FPGA and Tofino2 PCIe on Newport platform? Is there a specific startup sequence or script needed before running switchd?