Date: Mon, 31 Oct 2005 10:34:08 -0700 (MST) From: Warner Losh <imp@bsdimp.com> To: marcolz@stack.nl Cc: stable@freebsd.org Subject: Re: HEADS UP! 6.0-RELEASE coming Message-ID: <20051031.103408.71093019.imp@bsdimp.com> In-Reply-To: <20051031160150.GB87483@stack.nl> References: <20051031151809.GA83253@stack.nl> <43663A0A.4040608@samsco.org> <20051031160150.GB87483@stack.nl>
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> > The ACPI+sio problem is known. I have a motherboard with a similar
> > problem, though a different brand than yours. I solved it by removing
> > the ACPI attachment from the sio code. The better solution is to allow
> > loader hints to override ACPI hints. I tried talking to John Baldwin
> > about this but didn't get much of a response.
>
> I've tried all suggestions so far, but to no avail on most servers. Too
> many broken ACPI implementations I fear... Too bad motherboard vendors
> don't take the time to push proper software in their flash.
Right now acpi tells us there's a device, and we use it. Loader hints
should be used to map locations to device instances. It is more
general than just ACPI, however. People want to bind sio to a
specific port that comes out the back. People also want to bind rl0
to the card in slot 3.
Consider my system:
sio0 pnpinfo _HID=PNP0501 _UID=1 at handle=\_SB_.PCI0.SBRG.UAR1
sio1 pnpinfo _HID=PNP0501 _UID=2 at handle=\_SB_.PCI0.SBRG.UAR2
On this system, UAR1 is the port that comes out the back, so I have
what I want. However, I'd like to be able to say:
hint.sio.0.at="acpi"
hint.sio.0.location="\_SB_.PCI0.SBRG.UAR2"
or
hint.sio.0.at="acpi"
hint.sio.0.location="UAR2"
or
hint.fxp.0.at="pci"
hint.fxp.0.location="bus=2 slot=3 function=0"
hint.fxp.1.at="pci"
hint.fxp.1.location="pci2:2:0"
Since we really want to map the devices in some arbitrary ACPI tree to
instances in the system, rather than mapping devices that happen to
live at a specific resource address to specific instances in the tree.
However, there are a number of issues in doing this generically and
with error cases. How does one deal with the different syntaxes?
What extensions to the newbus system are there? etc.
Warner
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