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T1024 PCIe Configuration read error

Question asked by abinesh selvaraj on Oct 20, 2016
Latest reply on Mar 15, 2017 by Ji Hyun Yoon



We try to connect T1024 RDB and Marvell Switch Reference Board in PCIe interface (PCIe controller 2). The  switch is enumerated in T1024 and the vendor/device id of switch is listed in "lspci" command. While we try to access the config space in /sys/bus/pci/devices/0002:05:00.0/config from linux prompt, the following error message is shown,


#cat /sys/bus/pci/devices/0002\:05\:00.0/config
PCIe error(s) detected
PCIe ERR_DR register: 0x00400000
PCIe ERR_CAP_STAT register: 0x80000001
PCIe ERR_CAP_R0 register: 0x00000800
PCIe ERR_CAP_R1 register: 0x00000000
PCIe ERR_CAP_R2 register: 0x00000000
PCIe ERR_CAP_R3 register: 0x00000000


It is understood from the T1024 RM that, the 0x00400000 in ERR_DR register is due to OAC (Outbound ATMU crossing). Please mention the possible reasons for this error.