Date: Thu, 13 Feb 2014 15:18:39 -0500 From: John Baldwin <jhb@freebsd.org> To: Marcel Moolenaar <marcel@xcllnt.net> Cc: Marcel Moolenaar <marcel@freebsd.org>, ia64@freebsd.org Subject: Re: svn commit: r261790 - in head/sys: amd64/include dev/acpica dev/cardbus dev/pccbb dev/pci i386/include sparc64/pci x86/include x86/pci x86/x86 Message-ID: <1706878.v7mRcKNgdr@ralph.baldwin.cx> In-Reply-To: <FC0CF6C1-82E5-478B-86D7-01E1432F0F1E@xcllnt.net> References: <201402120430.s1C4Uctm088069@svn.freebsd.org> <201402121425.48635.jhb@freebsd.org> <FC0CF6C1-82E5-478B-86D7-01E1432F0F1E@xcllnt.net>
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On Wednesday, February 12, 2014 03:09:53 PM Marcel Moolenaar wrote: > On Feb 12, 2014, at 11:25 AM, John Baldwin <jhb@freebsd.org> wrote: > > On Tuesday, February 11, 2014 11:30:38 pm John Baldwin wrote: > >> Author: jhb > >> Date: Wed Feb 12 04:30:37 2014 > >> New Revision: 261790 > >> URL: http://svnweb.freebsd.org/changeset/base/261790 > >> > >> Log: > >> Add support for managing PCI bus numbers. As with BARs and PCI-PCI > >> bridge > >> I/O windows, the default is to preserve the firmware-assigned resources. > >> PCI bus numbers are only managed if NEW_PCIB is enabled and the > >> architecture defines a PCI_RES_BUS resource type. > >> - Add a helper API to create top-level PCI bus resource managers for > >> each > >> > >> PCI domain/segment. Host-PCI bridge drivers use this API to allocate > >> bus numbers from their associated domain. > >> > >> - Change the PCI bus and CardBus drivers to allocate a bus resource for > >> > >> their bus number from the parent PCI bridge device. > >> > >> - Change the PCI-PCI and PCI-CardBus bridge drivers to allocate the > >> > >> full range of bus numbers from secbus to subbus from their parent > >> bridge. > >> The drivers also always program their primary bus register. The > >> bridge > >> drivers also support growing their bus range by extending the bus > >> resource > >> and updating subbus to match the larger range. > >> > >> - Add support for managing PCI bus resources to the Host-PCI bridge > >> drivers > >> > >> used for amd64 and i386 (acpi_pcib, mptable_pcib, legacy_pcib, and > >> qpi_pcib).>> > >> - Define a PCI_RES_BUS resource type for amd64 and i386. > > > > Since ia64 only uses ACPI Host-PCI bridges, I believe that this can be > > enabled on ia64 by just adding an appropriate #define for PCI_RES_BUS to > > <machine/bus.h>. I just have no way to test it. > > I'll give it a spin. Altix 350 & Altix 450 have non-standard PCI > host controllers, which I do want to test. The firmware does not > dictate bus numbers, so it may be a non-issue. You will need the rman bits regardless as pci(4) will expect to be able to allocate a bus resource. For Host-PCI bridge drivers you need to handle PCI_RES_BUS in bus_alloc_resource(), bus_adjust_resource(), and bus_release_resource(). Mostly you just need to call the pci_domain functions passing in the domain the bridge belongs to. -- John Baldwin
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