Re: HEADS UP! 6.0-RELEASE coming

From: Warner Losh (imp_at_bsdimp.com)
Date: 10/31/05

  • Next message: Scott Long: "Re: HEADS UP! 6.0-RELEASE coming" 
    Date: Mon, 31 Oct 2005 10:34:08 -0700 (MST)
To: marcolz@stack.nl

    > > 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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  • Next message: Scott Long: "Re: HEADS UP! 6.0-RELEASE coming"