From owner-cvs-src@FreeBSD.ORG Fri Sep 16 07:08:44 2005 Return-Path: X-Original-To: cvs-src@FreeBSD.org Delivered-To: cvs-src@FreeBSD.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id BAC1D16A41F; Fri, 16 Sep 2005 07:08:44 +0000 (GMT) (envelope-from imp@bsdimp.com) Received: from harmony.bsdimp.com (vc4-2-0-87.dsl.netrack.net [199.45.160.85]) by mx1.FreeBSD.org (Postfix) with ESMTP id 572F743D48; Fri, 16 Sep 2005 07:08:44 +0000 (GMT) (envelope-from imp@bsdimp.com) Received: from localhost (localhost.village.org [127.0.0.1] (may be forged)) by harmony.bsdimp.com (8.13.3/8.13.3) with ESMTP id j8G77Y9P042700; Fri, 16 Sep 2005 01:07:34 -0600 (MDT) (envelope-from imp@bsdimp.com) Date: Fri, 16 Sep 2005 01:07:46 -0600 (MDT) Message-Id: <20050916.010746.98777894.imp@bsdimp.com> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org From: "M. Warner Losh" In-Reply-To: <200509160702.j8G72TBv063544@repoman.freebsd.org> References: <200509160702.j8G72TBv063544@repoman.freebsd.org> X-Mailer: Mew version 3.3 on Emacs 21.3 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-2.0 (harmony.bsdimp.com [127.0.0.1]); Fri, 16 Sep 2005 01:07:34 -0600 (MDT) Cc: Subject: Re: cvs commit: src/sys/dev/acpica acpi_pcib_acpi.c src/sys/i386/pci pci_bus.c X-BeenThere: cvs-src@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 16 Sep 2005 07:08:44 -0000 In message: <200509160702.j8G72TBv063544@repoman.freebsd.org> Warner Losh writes: : imp 2005-09-16 07:02:29 UTC : : FreeBSD src repository : : Modified files: : sys/dev/acpica acpi_pcib_acpi.c : sys/i386/pci pci_bus.c : Log: : Commit a workaround to a problem with resource allocation. This helps : with some Dell servers that booted w/o a problem[*] on 5.4, but failed : with 6.0-BETA. : : On the PCI bus, when we do lazy resource allocation, we narrow the : range requested as we pass through bridges to reflect how the bridges : are programmed and what addresses they pass. However, when we're : doing an allocation on a bus that's directly connected to a host : bridge, no such translation can take place. We already had a fallback : range for memory requests, but none for ioports. As such, provide a : fallback for I/O ports so we don't allocate location 0, which will : have undesired side effects when the resources are actually used. : : This fixes a problem with booting a Dell server with usb in the : kernel. However, it is an unsatisfying solution. I don't like the : hard coded value, and I think we should start narrowing the resources : returned to not be in the so-called isa alias area (where the ranage & : 0x0300 must be 0 iirc). Doing such filtering will have to wait for : another day. : : This may be a good 6 candidate, maybe after its had a chance to be : refined. : : Tested by: glebius@ for those interested in the omitted footnote: [*] and also without its first usb controller: uhci0 failed to attach. I don't think this is worthy of a forced commit, but I know how some people are when they see dangling references... Warner