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    SubjectRe: AGP bogosities
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    On Fri, 2005-03-11 at 08:39 -0800, Jesse Barnes wrote:
    > On Thursday, March 10, 2005 8:30 pm, Benjamin Herrenschmidt wrote:
    > > On Thu, 2005-03-10 at 20:02 -0800, Jesse Barnes wrote:
    > > > On Thursday, March 10, 2005 6:38 pm, Benjamin Herrenschmidt wrote:
    > > > > That one is even worse... from what I see in your lspci output, you
    > > > > have no bridge with AGP capability at all, and the various AGP devices
    > > > > are all siblings...
    > > >
    > > > Both of the video cards are sitting on agp busses in agp slots hooked up
    > > > to host to agp bridges.
    > > >
    > > > > Are you sure there is any real AGP slot in there ?
    > > >
    > > > Yes :)
    > >
    > > Well, according to your lspci, none of the bridges exposes a device with
    > > AGP capabilities...
    >
    > There are no bridges listed in my lspci output, that's probably why. :)

    HP ia64 and parisc boxes are similar. The host bridges do not appear
    as PCI devices. We discover them via ACPI on ia64 and PDC on parisc.

    > > It looks like you aren't exposing the host "self"
    > > device on the bus. Do you have an AGP driver ? If yes, it certainly
    > > can't use any of the generic code anyway ...
    >
    > Right, it's a special agp driver, sgi-agp.c.

    Where's sgi-agp.c? The HP (ia64-only at the moment) code is hp-agp.c.
    It does make a fake PCI dev for the bridge because DRM still seemed to
    want that.

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