On Thu, Feb 6, 2014 at 2:47 PM, Thomas Hoffmann <trh411_at_gmail.com> wrote: > On Thu, Feb 6, 2014 at 2:37 PM, John Baldwin <jhb_at_freebsd.org> wrote: > >> I have a patch to teach the PCI bus code and PCI-PCI bridge driver to >> manage >> PCI bus numbers. The approach is somewhat similar to how NEW_PCIB >> manages I/O >> windows for briges. Each bridge creates an rman to manage the bus >> numbers for >> all buses and bridges that live below it. Each bus allocates a bus >> resource >> from its parent bridge, and child bridges allocate their ranges from their >> parent devices. At the "top" of the PCI tree, the Host-PCI bridges >> allocate >> their respective bus ranges from their PCI domain/segment. There isn't >> really >> a device node for PCI domains, so I created a helper API that basically >> auto- >> creates a PCI bus rman for each domain on first use and then sub-allocates >> from that for Host-PCI bridges. >> >> The current patch (with some extra debugging) is at >> http://people.FreeBSD.org/~jhb/patches/pci_bus_rman.3.patch >> >> I would like to commit this to HEAD soon but thought I would post it for >> some >> pre-commit testing for the brave. :) If you are really brave, try booting >> with 'hw.pci.clear_buses=1' which will force the kernel to renumber all >> buses >> in the system. If you are really, really brave, try booting with >> 'hw.pci.clear_bars=1', 'hw.pci.clear_buses=1', and 'hw.pci.clear_pcib=1'. >> (My >> laptop survives with all those set) >> >> Note that the patch only enables bus number management on amd64 and i386. >> I >> believe ia64 just needs to define PCI_RES_BUS for this to work since it >> mandates ACPI. Porting this to other platforms requires handling >> PCI_RES_BUS >> rseources for Host-PCI bridges in bus_alloc_resource(), >> bus_adjust_resource(), >> and bus_release_resource(). >> >> -- >> John Baldwin >> > > I get a "404 - Not Found" trying to follow the link. > Got it by backing up one level on the link and selecting form the list.Received on Thu Feb 06 2014 - 18:54:06 UTC
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