finding which pci device works as ide controller for root fs

finding which pci device works as ide controller for root fs

[Arkadiusz Miskiewicz]

Hi,

I need /dev/hdX -> pci id mapping for geninitrd script - with modular IDE I 
need to load some IDE controller driver from initrd to mount root fs.

Now I'm loading all modules for IDE devices found from:
awk ' { print $2 } ' /proc/bus/pci/devices
+ simple file which maps PCI ID to module name like
808684cb piix

How to find controller which is used for root fs (and do not load other 
modules)? I suppose that on 2.4 this is impossible from userspace but on 2.6 
maybe sysfs will be useful.

[arekm@mobarm arekm]$ ls -l /sys/block/hda/device
lrwxrwxrwx    1 root     root           46 2003-08-14 00:49 
/sys/block/hda/device -> ../../devices/pci0000:00/0000:00:11.1/ide0/0.0

Is it possible to get PCI ID from sysfs for specified device?

-- 
Arkadiusz Miśkiewicz    CS at FoE, Wroclaw University of Technology
arekm@sse.pl   AM2-6BONE, 1024/3DB19BBD, arekm(at)ircnet, PLD/Linux

Re: finding which pci device works as ide controller for root fs

[Greg KH]

On Thu, Aug 14, 2003 at 06:26:30PM +0200, Arkadiusz Miskiewicz wrote:
> 
> [arekm@mobarm arekm]$ ls -l /sys/block/hda/device
> lrwxrwxrwx    1 root     root           46 2003-08-14 00:49 
> /sys/block/hda/device -> ../../devices/pci0000:00/0000:00:11.1/ide0/0.0
> 
> Is it possible to get PCI ID from sysfs for specified device?

It's right there in the path to the ide device "0000:00:11.1"


greg k-h

Re: finding which pci device works as ide controller for root fs

[Arkadiusz Miskiewicz]

On Friday 15 of August 2003 02:15, Greg KH wrote:
> On Thu, Aug 14, 2003 at 06:26:30PM +0200, Arkadiusz Miskiewicz wrote:
> > [arekm@mobarm arekm]$ ls -l /sys/block/hda/device
> > lrwxrwxrwx    1 root     root           46 2003-08-14 00:49
> > /sys/block/hda/device -> ../../devices/pci0000:00/0000:00:11.1/ide0/0.0
> >
> > Is it possible to get PCI ID from sysfs for specified device?
>
> It's right there in the path to the ide device "0000:00:11.1"
How's that related to awk ' { print $2 } ' /proc/bus/pci/devices?

> greg k-h

-- 
Arkadiusz Miśkiewicz    CS at FoE, Wroclaw University of Technology
arekm@sse.pl   AM2-6BONE, 1024/3DB19BBD, arekm(at)ircnet, PLD/Linux

Re: finding which pci device works as ide controller for root fs

[Charles Lepple]

Arkadiusz Miskiewicz wrote:
> On Friday 15 of August 2003 02:15, Greg KH wrote:
> 
>>On Thu, Aug 14, 2003 at 06:26:30PM +0200, Arkadiusz Miskiewicz wrote:
>>
>>>[arekm@mobarm arekm]$ ls -l /sys/block/hda/device
>>>lrwxrwxrwx    1 root     root           46 2003-08-14 00:49
>>>/sys/block/hda/device -> ../../devices/pci0000:00/0000:00:11.1/ide0/0.0
>>>
>>>Is it possible to get PCI ID from sysfs for specified device?
>>
>>It's right there in the path to the ide device "0000:00:11.1"
> 
> How's that related to awk ' { print $2 } ' /proc/bus/pci/devices?

If you're looking for the vendor and product IDs, they're in 
/sys/devices/pci..../..../{vendor,device}

-- 
Charles Lepple <ghz.cc!clepple>