Date: Thu, 1 Jun 2000 16:13:22 -0500 (CDT) From: Chris Dillon <cdillon@wolves.k12.mo.us> To: "Kenneth D. Merry" <ken@kdm.org> Cc: Fred Clift <fred@veriohosting.com>, Luigi Rizzo <luigi@info.iet.unipi.it>, freebsd-hackers@FreeBSD.ORG, freebsd-stable@FreeBSD.ORG Subject: Re: changed pci bus probe order from 3.2 to 4.0 -- ideas? Message-ID: <Pine.BSF.4.20.0006011555410.40168-100000@mail.wolves.k12.mo.us> In-Reply-To: <20000601113842.A92456@panzer.kdm.org>
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On Thu, 1 Jun 2000, Kenneth D. Merry wrote: > On Thu, Jun 01, 2000 at 11:19:29 -0600, Fred Clift wrote: > > > > > > i suppose the only place where you use the actual card names > > > is the firewall config and rc.conf -- can't you just make these > > > scripts fetch the ethernet address of the card(s), set a shell > > > variable with the name of the good card, and go ahead with that ? > > > > Yeah I'm about to the point of doing this for lack of other options. > > Thanks for the sample code -- I'm sure it'll come in handy if I can solve > > this any other way. > > > > The best fix would be to find a way to hard-wire which card is which in > > the kernel config (ie fxp0 is always on pci0...) but I dont know if you > > can do that kind of thing with pci devices. > > The problem is that when the new-bus code was introduced, the probe order > was changed from a bus-by-bus probe (breadth first?) to a depth-first > probe. > > i.e. as soon as another PCI bus is found (e.g. on a bridge chip) it is > probed, rather than deferring the probe of the new bus until the probe of > the current bus has been completed. > > I think Doug Rabson had plans to fix the probe order, but it never > happened. > > There is no way to hardwire PCI devices, so you'll probably have to just > change which card is referenced in your scripts. I can see that that would be fun if I were to switch from 3.4-STABLE to 4.0-STABLE on my 7-NIC (8-port) router. Currently they all probe in a way that the physical layout of the cards mirrors the logical layout. One is a dual-port NIC with PCI bridge which would constitute a PCI bus all by itself, then I believe there are three separate PCI busses of three slots each for a total of 9 PCI slots (or it could be 4x2 and 1x1). I can just imagine a physical to logical mapping nightmare of 2-3-4-7-8-9-1-2-3 now. :-) -- Chris Dillon - cdillon@wolves.k12.mo.us - cdillon@inter-linc.net FreeBSD: The fastest and most stable server OS on the planet. For Intel x86 and Alpha architectures. ( http://www.freebsd.org ) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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