From patchwork Wed Nov 25 19:59:43 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinghai Lu X-Patchwork-Id: 62993 Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id nAPK2ieA006283 for ; Wed, 25 Nov 2009 20:02:44 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934836AbZKYUBH (ORCPT ); Wed, 25 Nov 2009 15:01:07 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759702AbZKYUBF (ORCPT ); Wed, 25 Nov 2009 15:01:05 -0500 Received: from hera.kernel.org ([140.211.167.34]:56942 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759733AbZKYUBA (ORCPT ); Wed, 25 Nov 2009 15:01:00 -0500 Received: from [10.6.76.26] (sca-ea-fw-1.Sun.COM [192.18.43.225]) (authenticated bits=0) by hera.kernel.org (8.14.3/8.14.3) with ESMTP id nAPK0XUv008981 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 25 Nov 2009 20:00:33 GMT Message-ID: <4B0D8CAF.7040007@kernel.org> Date: Wed, 25 Nov 2009 11:59:43 -0800 From: Yinghai Lu User-Agent: Thunderbird 2.0.0.23 (X11/20090817) MIME-Version: 1.0 To: Kenji Kaneshige , Jesse Barnes , "Eric W. Biederman" , Alex Chiang , Bjorn Helgaas CC: Ingo Molnar , "linux-kernel@vger.kernel.org" , "linux-pci@vger.kernel.org" , Ivan Kokshaysky Subject: [PATCH 7/9] pci: introduce pci_assign_unassigned_bridge_resources References: <4ADEB601.8020200@kernel.org> <4AE55D12.30403@kernel.org> <4AE57976.4060107@jp.fujitsu.com> <4AE5E37F.8070707@kernel.org> <4AE5EFDB.2060908@kernel.org> <4AE80170.6030402@jp.fujitsu.com> <4AE88305.8020207@kernel.org> <4AE899A0.3020006@kernel.org> <4AE95247.8080401@jp.fujitsu.com> <4AE952B9.1010603@kernel.org> <4AE9588E.90708@jp.fujitsu.com> <4AE9657F.7010302@kernel.org> <4AE965D9.9040702@kernel.org> <20091104093044.17ab628a@jbarnes-piketon> <4AF1CD79.4010602@kernel.org> <4AF22CF1.1020508@kernel.org> <4AF22D26.4070500@kernel.org> <4AF508F0.9060105@kernel.org> <4AF91F54.10507@jp.fujitsu.com> <4AF936DB.1030309@kernel.org> <4AFCF7D8.1090207@jp.fujitsu.com> <4AFCFC0D.4030002@kernel.org> <4AFD19DA.7010602@jp.fujitsu.com> <4AFE6F39.5080505@kernel.org> <4B0B321E.4010103@jp.fujitsu.com> <4B0B335E.1070809@kernel.org> <4B0B3C13.9030502@jp.fujit! su.com> <4B0C69AD.3030106@kernel. org> <4B0D13EB.9010403@jp.fujitsu.com> <4B0D88A4.5050904@kerne! l.org> In-Reply-To: <4B0D88A4.5050904@kernel.org> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Index: linux-2.6/drivers/pci/setup-bus.c =================================================================== --- linux-2.6.orig/drivers/pci/setup-bus.c +++ linux-2.6/drivers/pci/setup-bus.c @@ -68,6 +68,51 @@ static void free_failed_list(struct reso head->next = NULL; } +static void pdev_assign_resources_sorted(struct pci_dev *dev, + struct resource_list *fail_head) +{ + struct resource *res; + struct resource_list head, *list, *tmp; + int idx; + u16 class = dev->class >> 8; + + head.next = NULL; + + /* Don't touch classless devices or host bridges or ioapics. */ + if (class == PCI_CLASS_NOT_DEFINED || class == PCI_CLASS_BRIDGE_HOST) + return; + + /* Don't touch ioapic devices already enabled by firmware */ + if (class == PCI_CLASS_SYSTEM_PIC) { + u16 command; + pci_read_config_word(dev, PCI_COMMAND, &command); + if (command & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) + return; + } + + pdev_sort_resources(dev, &head); + + for (list = head.next; list;) { + res = list->res; + idx = res - &list->dev->resource[0]; + if (pci_assign_resource(list->dev, idx)) { + if (fail_head && !pci_is_root_bus(list->dev->bus)) { + /* + * device need to keep flags and size + * for second try + */ + add_to_failed_list(fail_head, list->dev, res); + } else { + res->start = 0; + res->end = 0; + res->flags = 0; + } + } + tmp = list; + list = list->next; + kfree(tmp); + } +} static void pbus_assign_resources_sorted(const struct pci_bus *bus, struct resource_list *fail_head) { @@ -281,9 +326,6 @@ static void __pci_setup_bridge(struct pc { struct pci_dev *bridge = bus->self; - if (pci_is_enabled(bridge)) - return; - dev_info(&bridge->dev, "PCI bridge to [bus %02x-%02x]\n", bus->secondary, bus->subordinate); @@ -646,7 +688,8 @@ static void __ref __pci_bus_assign_resou switch (dev->class >> 8) { case PCI_CLASS_BRIDGE_PCI: - pci_setup_bridge(b); + if (!pci_is_enabled(dev)) + pci_setup_bridge(b); break; case PCI_CLASS_BRIDGE_CARDBUS: @@ -667,6 +710,34 @@ void __ref pci_bus_assign_resources(cons } EXPORT_SYMBOL(pci_bus_assign_resources); +static void __ref __pci_bridge_assign_resources(const struct pci_dev *bridge, + struct resource_list *fail_head) +{ + struct pci_bus *b; + + pdev_assign_resources_sorted((struct pci_dev *)bridge, fail_head); + + b = bridge->subordinate; + if (!b) + return; + + __pci_bus_assign_resources(b, fail_head); + + switch (bridge->class >> 8) { + case PCI_CLASS_BRIDGE_PCI: + pci_setup_bridge(b); + break; + + case PCI_CLASS_BRIDGE_CARDBUS: + pci_setup_cardbus(b); + break; + + default: + dev_info(&bridge->dev, "not setting up bridge for bus " + "%04x:%02x\n", pci_domain_nr(b), b->number); + break; + } +} static void release_children_resource(struct resource *r) { struct resource *p; @@ -894,3 +965,18 @@ enable_and_dump: pci_bus_dump_resources(bus); } } + +void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge) +{ + struct pci_bus *bus; + struct pci_bus *parent = bridge->subordinate; + int retval; + + pci_bus_size_bridges(parent); + pci_clear_master(bridge); + __pci_bridge_assign_resources(bridge, NULL); + retval = pci_reenable_device(bridge); + pci_set_master(bridge); + pci_enable_bridges(parent); +} +EXPORT_SYMBOL_GPL(pci_assign_unassigned_bridge_resources); Index: linux-2.6/include/linux/pci.h =================================================================== --- linux-2.6.orig/include/linux/pci.h +++ linux-2.6/include/linux/pci.h @@ -768,6 +768,7 @@ void pci_bus_assign_resources(const stru void pci_bus_size_bridges(struct pci_bus *bus); int pci_claim_resource(struct pci_dev *, int); void pci_assign_unassigned_resources(void); +void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge); void pdev_enable_device(struct pci_dev *); void pdev_sort_resources(struct pci_dev *, struct resource_list *); int pci_enable_resources(struct pci_dev *, int mask);