svn commit: r277163 - head/sys/dev/cardbus

[Nathan Whitehorn]

On 01/15/15 10:51, John Baldwin wrote:
> On 1/15/15 11:20 AM, Nathan Whitehorn wrote:
>> On 01/14/15 16:07, Warner Losh wrote:
>>>> On Jan 14, 2015, at 8:32 AM, Justin Hibbits <chmeeedalf at gmail.com>
>>>> wrote:
>>>>
>>>> On Wed, 14 Jan 2015 09:23:05 -0500
>>>> John Baldwin <jhb at FreeBSD.org> wrote:
>>>>
>>>>> On 1/14/15 12:41 AM, Warner Losh wrote:
>>>>>> Author: imp
>>>>>> Date: Wed Jan 14 05:41:31 2015
>>>>>> New Revision: 277163
>>>>>> URL: https://svnweb.freebsd.org/changeset/base/277163
>>>>>>
>>>>>> Log:
>>>>>>    Add a rather obnoxious warning if you don't have NEW_PCIB defined
>>>>>>    since it's a total crap shoot if things will work.
>>>>> Should we just make it a #error instead?  (Some day I hope to have
>>>>> NEW_PCIB enabled by default and remove the old code.  Will take a
>>>>> while to get there for the generic PCI code, but cardbus is probably
>>>>> only used on x86 so that would be fine.)
>>>>>
>>>> Also powerpc, but NEW_PCIB is default there as well.
>>> PowerPC doesn’t seem to defined the bus number resources.
>>>
>>> Warner
>>>
>> Which ones?
>> -Nathan
> PCI_RES_BUS.
>
> https://svnweb.freebsd.org/base?view=revision&revision=261790
>
> I misspoke about it being in the nexus.  On x86 it is done in the ACPI
> Host-PCI bridge drivers (since those have a _SEG method to know which
> PCI domain/segment/hose the child bus belongs to).  You could
> conceivably do it higher up at whatever level understands which PCI
> domain a given Host-PCI bridge lives in.
>
> If you only ever support a single PCI domain, you could just place it in
> the nexus with a hardcoded domain arg of 0 to the pci_domain_*() functions.
>

Most PPC systems have at least two and usually more PCI domains. I'll 
take a look at adding this.
-Nathan