Re: [PATCH] 2.5.14 IDE 56

Martin Dalecki
2002-05-08T09:10:52Z

Uz.ytkownik benh@kernel.crashing.org napisa?:
>> /driverfs/root/pci0/00:1f.4/usb_bus/000/
>>
>>and it wouldn't be impossible (or even necessarily very hard) to make an
>>IDE controller export the "IDE device tree" the same way a USB controller
>>now exports the "USB device tree".
>>
>>For things like hotplug etc, I think driverfs is eventually the only way
>>to go, simply because it gives you the full (and unambiguous) path to
>>_any_ device, and is completely bus-agnostic.
>>
>>But there is definitely a potential backwards-compatibility-issue.
>
>
> One interesting thing here would be to have some optional link between
> the bus-oriented device tree and the function-oriented tree (ie. devfs
> or simply /dev). For example, an IDE node in driverfs could eventually
> hold symlinks to the entries it provides in /dev when using devfs (or
> just provide major/minor when not using devfs).
>
> What do you think ?
>
> One problem I've been faced with on ppc is to be able to match
> a linux device with what the firmware (Open Firmware) thinks that
> device is. The firmware view is bus-centered and it would be pretty
> easy to provide some additional entries in driverfs that give the
> OF fullpath of a given device. But then, the link between the actual
> driver in driverfs and the "device" as used by, for example, the
> filesystem isn't trivial.
>
> Ben.
>
>
>

This is the "first" IDE controller on my notebook:

./devices/root/pci0/00:07.1/01f0
./devices/root/pci0/00:07.1/01f0/0
./devices/root/pci0/00:07.1/01f0/0/power
./devices/root/pci0/00:07.1/01f0/0/name
./devices/root/pci0/00:07.1/01f0/0/status
./devices/root/pci0/00:07.1/01f0/power
./devices/root/pci0/00:07.1/01f0/name
./devices/root/pci0/00:07.1/01f0/status

Guys I have done it already!

For your convenience I will attach the ata prefix to the
currently used port number in the next patch round.

OK?