linux-kernel - Re: Porting pch_pcieqos to 3.2 for Intel EG20T with no MAC

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Message-ID: <CANKRQnjUZt+RM20AdevFGJGM+G=+o+x6vjy7=eUnSAzYtEvqjQ@mail.gmail.com>
Date:	Mon, 16 Jan 2012 12:06:55 +0900
From:	Tomoya MORINAGA <tomoya.rohm@...il.com>
To:	Darren Hart <darren.hart@...el.com>
Cc:	"lkml," <linux-kernel@...r.kernel.org>,
	Wang Qi <qi.wang@...el.com>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: Re: Porting pch_pcieqos to 3.2 for Intel EG20T with no MAC

Hi Darren,

Can you execute like below
root@(none):/# find /sys/bus/pci/drivers/pch_phub/0000:02:00.0

You must see pch_mac.

Or
Is your pch_phub integrated as module ?
If module, you can access from below.
/sys/module/pch_phub/drivers/pci:pch_phub/0000:02:00.0

thanks,
tomoya


2012/1/14 Darren Hart <darren.hart@...el.com>:
> On 01/10/2012 05:58 PM, Darren Hart wrote:
>> I find myself with a development board with no MAC address for the pch_gbe in
>> the Platform Controller Hub EG20T. I've dusted off an old patch and am trying
>> to get it working so it can be included upstream.
>>
>> I found the phub_util_mac utility on sourceforge which appears to require the
>> following patch:
>>
>> http://git.yoctoproject.org/cgit/cgit.cgi/meta-extras/plain/recipes-kernel/linux/linux-netbook-2.6.33.2/linux-2.6.34-pch-pcieqos.patch
>>
>> I've made the obvious changes to the driver to use unlocked_ioctl as ioctl has
>> been removed upstream. With this driver built and installed, the
>> topcliff_mac_util command reports no errors and reads the MAC address as:
>>
>> 00:00:00:00:00:00
>>
>> Trying to set it reports no errors either, and the instrumentation suggests it
>> is at least trying to write the correct data. Reading back still results in all
>> zeros.
>>
>> During boot, the pch_gbe driver reports:
>> [    2.211233] pch_gbe 0000:02:00.1: enabling device (0000 -> 0003)
>> [    2.217271] pch_gbe 0000:02:00.1: PCI INT A -> GSI 16 (level, low) -> IRQ 16
>> [    2.224349] pch_gbe 0000:02:00.1: setting latency timer to 64
>> [    2.233388] pch_gbe 0000:02:00.1: Invalid MAC Address
>> [    2.238821] pch_gbe 0000:02:00.1: PCI INT A disabled
>> [    2.243809] pch_gbe: probe of 0000:02:00.1 failed with error -5
>>
>> The patch itself follows, I have attached a rather lengthy log which includes a
>> read/write/read cycle demonstrating the write not taking effect.
>>
>> Can you shed some light on why this might be the case?
>
> After stumbling around blindly for a bit longer, I ran across the pch_phub
> driver, which appears to be intended for the same purpose, but uses a sysfs
> interface rather than an ioctl interface with a separate userpsace utility.
> Do I have this right?
>
> Enabling this driver doesn't change the above pch_gbe messages which still
> include the failed probe of 0000:02:00.1. pch_phub has entries in /sys:
>
> root@(none):/# find /sys/bus/pci/drivers/pch_phub
> /sys/bus/pci/drivers/pch_phub
> /sys/bus/pci/drivers/pch_phub/uevent
> /sys/bus/pci/drivers/pch_phub/unbind
> /sys/bus/pci/drivers/pch_phub/bind
> /sys/bus/pci/drivers/pch_phub/new_id
> /sys/bus/pci/drivers/pch_phub/remove_id
>
> but no "pch_mac" as I was expecting after reviewing pch_phub.c.
>
> Am I still barking up the wrong tree here?
>
> --
> Darren Hart
> Intel Open Source Technology Center
> Yocto Project - Linux Kernel
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