Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752344Ab0BHWoX (ORCPT ); Mon, 8 Feb 2010 17:44:23 -0500 Received: from g1t0026.austin.hp.com ([15.216.28.33]:15875 "EHLO g1t0026.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751604Ab0BHWoW (ORCPT ); Mon, 8 Feb 2010 17:44:22 -0500 Subject: [PATCH v2 0/7] PCI: try "pci=use_crs" again To: Jesse Barnes From: Bjorn Helgaas Cc: Matthew Garrett , Tony Luck , linux-pci@vger.kernel.org, Peter Haight , Gary Hade , linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, Yinghai Lu , Ingo Molnar , Linus Torvalds , Larry Finger Date: Mon, 08 Feb 2010 15:44:18 -0700 Message-ID: <20100208224236.27954.4358.stgit@bob.kio> User-Agent: StGit/0.15 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2965 Lines: 62 Historically, Linux has assumed a single PCI host bridge, with that bridge claiming all the address space left after RAM and legacy devices are taken out. If the system contains multiple host bridges, we can no longer operate under that assumption. We have to know what parts of the address space are claimed by each bridge so that when we assign resources to a PCI device, we take them from a range claimed by the upstream host bridge. We use ACPI to enumerate all the PCI host bridges in the system, and part of the host bridge description is the "_CRS" (current resource settings" property, which lists the address space used by the bridge. On x86, we currently ignore most of the _CRS information. This patch series changes this, so we will use _CRS to learn about the host bridge windows. Since most x86 machines with multiple host bridges are relatively new, this series only turns this on for machines with BIOS dates of 2010 or newer and for a few machines we know to require it. These apply on be6e9f7853e. I added an initial patch to clean up the formatting of the disabled window printk. Changes since v1: - rebase to be6e9f7853e - add patch to clean up "disabled window" printk - add bugzilla reference comment in use_crs DMI quirk --- Bjorn Helgaas (7): PCI: make disabled window printk style match the enabled ones PCI: break out primary/secondary/subordinate for readability PCI: split up pci_read_bridge_bases() PCI: read bridge windows before filling in subtractive decode resources PCI: replace bus resource table with a list x86/PCI: use host bridge _CRS info by default on 2010 and newer machines PCI: reference bridge window resources explicitly Documentation/kernel-parameters.txt | 8 +- arch/ia64/include/asm/acpi.h | 1 arch/ia64/pci/pci.c | 20 ++-- arch/x86/include/asm/pci_x86.h | 1 arch/x86/pci/acpi.c | 105 +++++++++++++++------- arch/x86/pci/bus_numa.c | 9 +- arch/x86/pci/common.c | 3 + drivers/acpi/pci_root.c | 1 drivers/pci/bus.c | 50 ++++++++++ drivers/pci/hotplug/shpchp_sysfs.c | 15 ++- drivers/pci/pci.c | 6 + drivers/pci/probe.c | 108 +++++++++++++++-------- drivers/pci/quirks.c | 4 - drivers/pci/setup-bus.c | 168 ++++++++++++++++++----------------- drivers/pcmcia/rsrc_nonstatic.c | 7 + drivers/pcmcia/yenta_socket.c | 46 ++++++---- include/acpi/acpi_drivers.h | 1 include/linux/pci.h | 27 ++++-- 18 files changed, 370 insertions(+), 210 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/