Date: Sun, 21 Jan 2001 11:19:03 +0100 From: Nicolas Souchu <nsouch@alcove.fr> To: John Baldwin <jhb@FreeBSD.org> Cc: "Donald J . Maddox" <dmaddox@sc.rr.com>, freebsd-hackers@FreeBSD.org Subject: Re: more info about: odd result of pci_read_config Message-ID: <20010121111903.B10148@ontario.alcove-int> In-Reply-To: <XFMail.010120163511.jhb@FreeBSD.org>; from jhb@FreeBSD.org on Sat, Jan 20, 2001 at 04:35:11PM -0800 References: <20010120192739.A2127@cae88-102-101.sc.rr.com> <XFMail.010120163511.jhb@FreeBSD.org>
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On Sat, Jan 20, 2001 at 04:35:11PM -0800, John Baldwin wrote:
> Look in /sys/compile/<foo> after compiling a kernel, it should be in pci_if.*
> It's a function that ues kobj to lookup the pci_read_config method in the
> parent bus. Look in the PCI code to find the real pci_read_config...
>
> >From sys/dev/pci/pci.c:
>
> DEVMETHOD(pci_read_config, pci_read_config_method),
>
> static u_int32_t
> pci_read_config_method(device_t dev, device_t child, int reg, int width)
> {
> struct pci_devinfo *dinfo = device_get_ivars(child);
> pcicfgregs *cfg = &dinfo->cfg;
>
> return PCIB_READ_CONFIG(device_get_parent(dev),
> cfg->bus, cfg->slot, cfg->func,
> reg, width);
> }
On -stable, it calls directly pci_cfgread() with the cfg.
My viapm driver is a kmodule. Could it be that PCI_READ_CONFIG is not
correctly resolved and returns ENXIO which is 0x6?
I'll try to wire it in the kernel.
Nicholas
--
Nicolas.Souchu@alcove.fr
Alcôve - Open Source Software Engineer - http://www.alcove.fr
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