MPC8641D PCI-Express error

Hi,

I'm working with the Freescale evaluation board MPC8641DHPCN and the VIRTEX5 evaluation board ML555 connected with the PCI-Express. When I try to read some register I have this problem:

Machine check in kernel mode.
Caused by (from SRR1=149030): Transfer error ack signal

Oops: Machine check, sig: 7 [#1]
PREEMPT SMP NR_CPUS=2
Modules linked in: virtex5

LTT NESTING LEVEL : 0
NIP: F108019C LR: F1080198 CTR: 00000001
REGS: c044dd60 TRAP: 0200 Tainted: GF (2.6.18-mpc8641d_hpcn)
MSR: 00149030 <EE,ME,IR,DR> CR: 22000222 XER: 00000000 TASK = c20e9990[568] 'insmod' THREAD: c044c000 CPU: 0
GPR00: F1080198 C044DE10 C20E9990 0000002E 80000000 FFFFFFFF 00008000 00002EA3
GPR08: C20E9990 00000000 C04C0220 C044C000 22000222 1001956C 00000000 00000000
GPR16: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
GPR24: 3000EAA0 7FD6FDC0 00000000 C045FCC0 F107E594 F10A0000 00000000 C2036000
NIP [F108019C] virtex5_probe+0x130/0x1c4 [virtex5]
LR [F1080198] virtex5_probe+0x12c/0x1c4 [virtex5]

Call Trace:
[C044DE10] [F1080198] virtex5_probe+0x12c/0x1c4 [virtex5] (unreliable)
[C044DE30] [C01D2A58] pci_device_probe+0x84/0xbc
[C044DE50] [C0213754] driver_probe_device+0x60/0x118
[C044DE70] [C0213890] __driver_attach+0x84/0x88
[C044DE90] [C02130F4] bus_for_each_dev+0x58/0x94
[C044DEC0] [C02135D4] driver_attach+0x24/0x34
[C044DED0] [C0212AC8] bus_add_driver+0x88/0x164
[C044DEF0] [C021397C] driver_register+0x70/0xb8
[C044DF00] [C01D284C] __pci_register_driver+0x64/0x98
[C044DF10] [F1080030] init_module+0x30/0x6c [virtex5]
[C044DF20] [C004CBFC] sys_init_module+0xc8/0x25c
[C044DF40] [C0011358] ret_from_syscall+0x0/0x38
--- Exception: c00 at 0xff6de0c
    LR = 0x10000de4

Instruction dump:
40820060 3c60f108 3863cea0 48000311 807f0238 3c800001 48000395 7c7d1b78 3c60f108 3863ced4 480002f5 809d0000 <3c60f108> 3863cf04 480002e5 3c60f108

Have you got any suggestions?

Thanks.

Marco

Any chance you can tell us what rev anything is?
SoC, Board, Kernel?

Significant improvement went into the 2.6.24 kernel development effort for many FSL PCI/PCI-E parts.

Thanks,
jdl

Jon Loeliger ha scritto:

Board: MPC8641D HPCN
SoC: MPC8641D rev. 2
Kernel: 2.6.18

Thanks.

Marco

OK, this is good.

And this is really old. Any chance of up-rev'ing that to something modern like 2.6.24? You may find that your PCI-E issues are Just Fixed there. Dunno.

HTH,
jdl

Jon Loeliger ha scritto:

No, but I can try to backport the PCI-E code from 2.6.24 to 2.6.18 if it could help. What do you think about it? Do you think this problem could be not present in 2.6.24?

I have no idea there, honestly. Sorry.

jdl

As Jon said, try 2.6.24 and see if it has an issue, if so we can look at helping. if not, you know you need to back port the fixes.

- k