topic Re: pci problem - 2 BARs given same address in i.MX Processors

pci problem - 2 BARs given same address

davidshoham — Mon, 04 Feb 2013 14:48:24 GMT

Hi,

After attaching a pci device and booting the imx6 I receive the following output for the config space of the device:

root@freescale /sys/devices/pci0000:00/0000:00:00.0/0000:01:00.0$ od -X config

0000000 ec301204 00100140 00000000 00000008

0000020 fffc0000 fffc0000 00000000 00000000

0000040 00000000 00000000 00000000 30101204

0000060 00000000 00000050 00000000 0000019b

0000100 00000000 00000000 00000000 00000000

0000120 00037001 00000000 00000000 00000000

0000140 00000000 00000000 00000000 00000000

0000160 00809005 00000000 00000000 00000000

0000200 00000000 00000000 00000000 00000000

0000220 00010010 00008000 00002010 00007411

0000240 00110000 00000000 00000000 00000000

0000260 00000000 00000000 00000000 00000000

BAR0 and BAR1 (marked in red) are given the same address. Is this a kernel bug? If so where should I look in the kernel source to fix it?

Thanks,

David

richard_zhu — Thu, 28 Mar 2013 06:45:06 GMT

I didn’t ever encounter such kind of phenomena.

Can you past the log of the “lspci –v ” info at your platform?

Yuri — Thu, 28 Mar 2013 07:15:19 GMT

Looks like this may relate to the next from the i.MX6 Errata :

ERR003757 PCIe: 9000448152—Internal Address Translation Unit (iATU):

Inbound Vendor Defined Message (VDM) ‘ID Match Mode’ is not

functional

ERR003759 PCIe: 9000439510—Internal Address Translation Unit (iATU) can

sometimes overwrite Outbound (Tx) Vendor Messages and MSIs

YixingKong — Tue, 02 Apr 2013 05:22:23 GMT

David

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Regards,

Yixing