how to list pci devices from userpace? anything better than /proc/bus/pci/devices?
I have a situation where the userspace app needs to be able to deal with
two different models of hardware, each of which uses a slightly
different api.
Is there any way that I can query the pci vendor/device numbers without having to parse ascii files in /proc?
Thanks,
Chris
Signature · 4 lines
Chris Friesen | MailStop: 043/33/F10 Nortel Networks | work: (613) 765-0557 3500 Carling Avenue | fax: (613) 765-2986 Nepean, ON K2H 8E9 Canada | email: [email protected]
Quoted 11 lines · Chris Friesen
I have a situation where the userspace app needs to be able to deal with
two different models of hardware, each of which uses a slightly
different api.Is there any way that I can query the pci vendor/device numbers without having to parse ascii files in /proc?
Thanks,
Chris
Red Hat distributions after 7.0 provide lspci. You still have to parse ASCII. FYI, it's not hard to write a 'C' program that directly accessed the PCI bus from its ports at 0xCF8 (index) and 0xCFC (data). You need to do 32-bit port accesses and you can set iopl(3) from user-space.
If you want to 'roll-your-own', I can send you some code to use as a template.
Cheers,
Dick Johnson
Penguin : Linux version 2.4.18 on an i686 machine (797.90 BogoMips).
Bush : The Fourth Reich of America
On Wed, 2002-11-27 16:41:18 -0500, Richard B. Johnson <[email protected]> wrote in message <[email protected]>:
Quoted 1 line · Chris Friesen
[Doing PCI config stuff from userland]
Quoted 2 lines
If you want to 'roll-your-own', I can send you some code to use as a template.
It would be nice if you'd post an URI. I think that many people could make use of it, and this would be nice for the archive:-)
MfG, JBG
Signature · 4 lines
Jan-Benedict Glaw [email protected] . +49-172-7608481 "Eine Freie Meinung in einem Freien Kopf | Gegen Zensur fuer einen Freien Staat voll Freier Bürger" | im Internet! Shell Script APT-Proxy: http://lug-owl.de/~jbglaw/software/ap2/
Hi!
Quoted 5 lines
Red Hat distributions after 7.0 provide
lspci. You still have to parse ASCII. FYI, it's not hard to write a 'C' program that directly accessed the PCI bus from its ports at0xCF8(index) and0xCFC(data). You need to do 32-bit port accesses and you can set iopl(3) from user-space.
Please DON'T do that -- not all machines support this access mechanism and even on them directly poking the I/O ports would lead to races with other programs and as well with the kernel.
Either use lspci (which has a nice machine-parseable output mode) or parse /proc/bus/pci/devices or use the libpci library (part of the pciutils package).
Have a nice fortnight
Signature · 3 lines
Martin `MJ' Mares <[email protected]> http://atrey.karlin.mff.cuni.cz/~mj/ Faculty of Math and Physics, Charles University, Prague, Czech Rep., Earth A LISP programmer knows value of everything, but cost of nothing.
Quoted 5 lines · Richard B. Johnson
Red Hat distributions after 7.0 provide
lspci. You still have to parse ASCII. FYI, it's not hard to write a 'C' program that directly accessed the PCI bus from its ports at0xCF8(index) and0xCFC(data). You need to do 32-bit port accesses and you can set iopl(3) from user-space.
That wont work portably. lspci comes with a pci access library that uses the kernel interfaces and does the job correctly
Quoted 7 lines · Chris Friesen
I have a situation where the userspace app needs to be able to deal with
two different models of hardware, each of which uses a slightly
different api.Is there any way that I can query the pci vendor/device numbers without having to parse ascii files in /proc?
See pcilib. Part of pciutils. (Its on freshmeat)
Dave
Signature · 2 lines
| Dave Jones. http://www.codemonkey.org.uk | SuSE Labs
Quoted 6 lines · Chris Friesen
I have a situation where the userspace app needs to be able to deal with two different models of hardware, each of which uses a slightly different api.
Is there any way that I can query the pci vendor/device numbers without having to parse ascii files in /proc?
look at libldetect from ldetect package.
http://cvs.mandrakesoft.com/cgi-bin/cvsweb.cgi/soft/ldetect/