Date: Fri, 21 Oct 2005 11:37:39 -0600 (MDT) From: "M. Warner Losh" <imp@bsdimp.com> To: jhb@FreeBSD.ORG Cc: frank@pinky.sax.de, freebsd-hackers@FreeBSD.ORG Subject: Re: How disable attachment of sio(4) driver to device? Message-ID: <20051021.113739.32720831.imp@bsdimp.com> In-Reply-To: <200510211216.37814.jhb@freebsd.org> References: <200510210835.j9L8Zn2P001846@pinky.frank-behrens.de> <20051021.100635.115989045.imp@bsdimp.com> <200510211216.37814.jhb@freebsd.org>
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In message: <200510211216.37814.jhb@freebsd.org>
John Baldwin <jhb@FreeBSD.ORG> writes:
: But you could hack the sio(4) driver to check its IO port and return ENXIO if
: it has a certain value, for example.
Yes. You could also do that. I have a tree somewhere that has some
changes in this direction, but I was unsatisified with it. I set out
to solve the 'I want SIO0 to be defined as PORT_B, since that's the
only one my server exports via acpi, how the heck do I know what
adress it is at, really?' problem too.
devinfo says:
sio0 pnpinfo _HID=PNP0501 _UID=1 at handle=\_SB_.PCI0.PX40.UAR1
sio1 pnpinfo _HID=PNP0501 _UID=2 at handle=\_SB_.PCI0.PX40.UAR2
I'd like to be able to say that sio0 is at handle=\_SB_.PCI0.PX40.UAR2
rather than some arbitrary address. Or that bge1 is at
bge0 pnpinfo vendor=0x14e4 device=0x16a6 subvendor=0x14e4 subdevice=0x8009 class=0x020000 at slot=3 function=0 handle=\_SB_.PCI0.G0PA.LAN0
miibus0
brgphy0 pnpinfo oui=0x818 model=0x16 rev=0x2 at phyno=1
bge1 pnpinfo vendor=0x14e4 device=0x16a6 subvendor=0x14e4 subdevice=0x8009 class=0x020000 at slot=4 function=0 handle=\_SB_.PCI0.G0PA.LAN1
either at pci2.4.0 *OR* at handle=\_SB_.PCI0.G0PA.LAN1 (or even
handle=LAN1). So there'd need to be some kind of bus specific mapping
function that would say true or false if a given device_t on that bus
matched the string presented.
You could then say that the device at handle=UAR1 belongs to mydev3,
and sio would never even be given a chance to bid on it.
I'm not sure how to work this into the current hints paradigm...
Warner
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