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SubjectRe: 2.4.x, drm, g400 and pci_set_master
I wasn't talking about the drm driver I was talking about programming
the PCI controller directly using setpci 1.0.0 .... or some such
command, I can't remember off hand. Which turns on busmastering if it
is off for a particular device.

Alex

Jeff Hartmann wrote:
>
> Alex Deucher wrote:
>
> > I'm not sure about the mga source, but you can enable busmaster manually
> > as root. See the dri-devel list for more. I can't remember the exact
> > message off hand. THere was also some discussion of this last week I
> > think.
> >
> > Alex
> >
> >
> > ----------------------------
> >
> > Hi,
> > friend of mine bought g400 on my recommendation, and unfortunately,
> > mga drm driver did not worked for me. I tracked it down to missing
> > pci_enable_device and pci_set_master in mga* driver. But even after
> > looking more than hour into that code I have no idea where I should
> > place this call, as it looks like that mga driver is completely
> > shielded from seeing pcidev structure :-(
> > Does anybody know where I should place pci_enable_device and
> > pci_set_master into mga code? I worked around pci_enable_device by
> > using matroxfb, but pci_set_master is not invoked by matroxfb, and
> > adding this call into matroxfb just to get mga drm driver to work does
> > not look correctly to me - although it is what I had done just now.
> > Thanks,
> > Petr Vandrovec
> > vandrove@vc.cvut.cz
> > -
> > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> > the body of a message to majordomo@vger.kernel.org
> > Please read the FAQ at http://www.tux.org/lkml/
> >
>
> The DRM drivers don't know about the pcidev structure at all. All this
> is done in the XFree86 ddx driver. You can probably add something like
> this to MGAPreInit (after pMga->PciTag is set, in my copy its
> mga_driver.c:1232 yours might be at a slightly different line number
> depending on the version your using):
>
> {
> CARD32 temp;
> temp = pciReadLong(pMga->PciTag, PCI_CMD_STAT_REG);
> pciWriteLong(pMga->PciTag, PCI_CMD_STAT_REG, temp |
> PCI_CMD_MASTER_ENABLE);
> }
>
> -Jeff
-
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