From owner-freebsd-i386@FreeBSD.ORG Tue Jul 16 19:10:00 2013 Return-Path: Delivered-To: freebsd-i386@smarthost.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id C6CF0702 for ; Tue, 16 Jul 2013 19:10:00 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:1900:2254:206c::16:87]) by mx1.freebsd.org (Postfix) with ESMTP id 9396ABF9 for ; Tue, 16 Jul 2013 19:10:00 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.7/8.14.7) with ESMTP id r6GJA0vf014311 for ; Tue, 16 Jul 2013 19:10:00 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.7/8.14.7/Submit) id r6GJA04Q014310; Tue, 16 Jul 2013 19:10:00 GMT (envelope-from gnats) Resent-Date: Tue, 16 Jul 2013 19:10:00 GMT Resent-Message-Id: <201307161910.r6GJA04Q014310@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-i386@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Chris Main Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 1C61760E for ; Tue, 16 Jul 2013 19:07:25 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from oldred.freebsd.org (oldred.freebsd.org [8.8.178.121]) by mx1.freebsd.org (Postfix) with ESMTP id 0F3D6BD1 for ; Tue, 16 Jul 2013 19:07:25 +0000 (UTC) Received: from oldred.freebsd.org ([127.0.1.6]) by oldred.freebsd.org (8.14.5/8.14.7) with ESMTP id r6GJ7O2l061450 for ; Tue, 16 Jul 2013 19:07:24 GMT (envelope-from nobody@oldred.freebsd.org) Received: (from nobody@localhost) by oldred.freebsd.org (8.14.5/8.14.5/Submit) id r6GJ7OOd061444; Tue, 16 Jul 2013 19:07:24 GMT (envelope-from nobody) Message-Id: <201307161907.r6GJ7OOd061444@oldred.freebsd.org> Date: Tue, 16 Jul 2013 19:07:24 GMT From: Chris Main To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-3.1 Subject: i386/180599: PCIe chipset test is not valid on recent Intel platforms X-BeenThere: freebsd-i386@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: I386-specific issues for FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Jul 2013 19:10:00 -0000 >Number: 180599 >Category: i386 >Synopsis: PCIe chipset test is not valid on recent Intel platforms >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-i386 >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Tue Jul 16 19:10:00 UTC 2013 >Closed-Date: >Last-Modified: >Originator: Chris Main >Release: 9.1 >Organization: TenAsys >Environment: (various) >Description: It is not possible to set up MSI interrupts on devices which appear before a PCI Express root complex on Intel series 7/series 8 chipsets because the pci_msi_blacklisted() test fails (in dev/pci.c) The reason is that the method for setting the pcie_chipset variable is no longer valid. Most devices in a PCI Express system no longer have the PCI Express capability registers, unless they are PCI Express root complexes or PCI Express plug-in cards. An example is the XHCI controller in the 7-series chipset, which occurs at pci0:0:20:0 and has no PCI Express capability register, but is MSI-capable. Because none of the preceding devices have the PCI Express capability either, the MSI test fails. >How-To-Repeat: Boot FreeBSD on such a system and use pciconf to demonstrate that the XHCI has been set up with an IRQ and not MSI. >Fix: Need a different method to determine system PCI Express property >Release-Note: >Audit-Trail: >Unformatted: