finding which pci device works as ide controller for root fs
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?
Signature · 2 lines
Arkadiusz Miśkiewicz CS at FoE, Wroclaw University of Technology [email protected] AM2-6BONE, 1024/3DB19BBD, arekm(at)ircnet, PLD/Linux
Quoted 6 lines · Arkadiusz Miskiewicz
[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/ide0/0.0Is 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
Quoted 8 lines · Greg KH
Quoted 5 lines · Arkadiusz Miskiewicz
[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/ide0/0.0Is 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 $2 } ' /proc/bus/pci/devices?
Quoted 1 line
greg k-h
Signature · 2 lines
Arkadiusz Miśkiewicz CS at FoE, Wroclaw University of Technology [email protected] AM2-6BONE, 1024/3DB19BBD, arekm(at)ircnet, PLD/Linux
Quoted 8 lines · Arkadiusz Miskiewicz
Quoted 6 lines · Greg KH
Quoted 4 lines · Arkadiusz Miskiewicz
[arekm@mobarm arekm]$ 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
Quoted 5 lines
Quoted 3 lines
Quoted 1 line
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}
Signature · 1 line
Charles Lepple <ghz.cc!clepple>