PLEASE REVIEW: Adding a pci_if method to facilitate specialized PCI bus drivers

John Baldwin jhb at
Fri Jun 27 11:01:43 PDT 2003

On 27-Jun-2003 Thomas Moestl wrote:
> On Fri, 2003/06/27 at 13:37:00 -0400, John Baldwin wrote:
>> On 13-Jun-2003 Thomas Moestl wrote:
>> > This requires us to get this firmware property in the OFW PCI bus
>> > driver before routing the interrupt; that can't be done in the pcib
>> > route_interrupt method, since we don't know whether we are routing for
>> > another bridge (where we use whichever index we get passed) or for a
>> > child device (in which case we would need to look at the firmware
>> > property).
>> Actually, can't you tell this by doing:
>>         if (device_get_parent(device_get_parent(dev)) == pcib)
>>                 /* Routing direct child. */
>>         else
>>                 /* Routing descedent of a child bridge. */
> No, pcib will always be a grandparent of dev. When routing a
> descendant child bridge, dev will itself be the device_t of a bridge,
> otherwise it is that of the device we are routing to.

Doh, yes. :(  Hmm, can you try something like this maybe:

        if (pci_get_class(dev) == PCIC_BRIDGE &&
            pci_get_subclass(dev) == PCIS_BRIDGE_PCI)
                /* Routing across a child bridge. */
                /* Routing a direct child that is not a bridge. */


John Baldwin <jhb at>  <><
"Power Users Use the Power to Serve!"  -

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