Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753390AbZJVA3y (ORCPT ); Wed, 21 Oct 2009 20:29:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752025AbZJVA3x (ORCPT ); Wed, 21 Oct 2009 20:29:53 -0400 Received: from hera.kernel.org ([140.211.167.34]:46152 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751525AbZJVA3w (ORCPT ); Wed, 21 Oct 2009 20:29:52 -0400 Message-ID: <4ADFA766.7080703@kernel.org> Date: Wed, 21 Oct 2009 17:29:26 -0700 From: Yinghai Lu User-Agent: Thunderbird 2.0.0.23 (X11/20090817) MIME-Version: 1.0 To: Alex Chiang , Jesse Barnes CC: "linux-kernel@vger.kernel.org" , "linux-pci@vger.kernel.org" , Kenji Kaneshige , Ivan Kokshaysky , Bjorn Helgaas Subject: [PATCH] pci: pciehp update the slot bridge res to get big range for pcie devices - v2 References: <4ADEB601.8020200@kernel.org> <20091021185715.GJ23948@ldl.fc.hp.com> In-Reply-To: <20091021185715.GJ23948@ldl.fc.hp.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6415 Lines: 214 move out bus_size_bridges and assign resources out of pciehp_add_bridge() and at last do them all together one time including slot bridge, to avoid to call assign resources several times, when there are several bridges under the slot bridge. need to introduce pci_bridge_assign_resources there. handle the case the slot bridge that doesn't get pre-allocated big enough res from FW. for example pcie devices need 256M, but the bridge only get preallocated 2M... pci_setup_bridge() will take extra check_enabled for the slot bridge, otherwise update res is not updated to bridge BAR. that is bridge is enabled already for port service. -v2: address Alex's concern about pci remove/rescan feature about pci_setup_bridge changes. Signed-off-by: Yinghai Lu --- drivers/pci/hotplug/pciehp_pci.c | 30 ++++++++++++---- drivers/pci/setup-bus.c | 73 +++++++++++++++++++++++++++++++++++++-- include/linux/pci.h | 1 3 files changed, 94 insertions(+), 10 deletions(-) Index: linux-2.6/drivers/pci/hotplug/pciehp_pci.c =================================================================== --- linux-2.6.orig/drivers/pci/hotplug/pciehp_pci.c +++ linux-2.6/drivers/pci/hotplug/pciehp_pci.c @@ -53,19 +53,18 @@ static int __ref pciehp_add_bridge(struc busnr = pci_scan_bridge(parent, dev, busnr, pass); if (!dev->subordinate) return -1; - pci_bus_size_bridges(dev->subordinate); - pci_bus_assign_resources(parent); - pci_enable_bridges(parent); - pci_bus_add_devices(parent); + return 0; } int pciehp_configure_device(struct slot *p_slot) { struct pci_dev *dev; - struct pci_bus *parent = p_slot->ctrl->pcie->port->subordinate; + struct pci_dev *bridge = p_slot->ctrl->pcie->port; + struct pci_bus *parent = bridge->subordinate; int num, fn; struct controller *ctrl = p_slot->ctrl; + int retval; dev = pci_get_slot(parent, PCI_DEVFN(0, 0)); if (dev) { @@ -96,12 +95,29 @@ int pciehp_configure_device(struct slot (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)) { pciehp_add_bridge(dev); } - pci_configure_slot(dev); pci_dev_put(dev); } - pci_bus_assign_resources(parent); + pci_bus_size_bridges(parent); + pci_clear_master(bridge); + pci_bridge_assign_resources(bridge); + retval = pci_reenable_device(bridge); + pci_set_master(bridge); + pci_enable_bridges(parent); pci_bus_add_devices(parent); + + for (fn = 0; fn < 8; fn++) { + dev = pci_get_slot(parent, PCI_DEVFN(0, fn)); + if (!dev) + continue; + if ((dev->class >> 16) == PCI_BASE_CLASS_DISPLAY) { + pci_dev_put(dev); + continue; + } + pci_configure_slot(dev); + pci_dev_put(dev); + } + return 0; } 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 @@ -27,6 +27,44 @@ #include #include "pci.h" +static void pdev_assign_resources_sorted(struct pci_dev *dev) +{ + 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)) { + 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 pci_dev *dev; @@ -137,14 +175,14 @@ EXPORT_SYMBOL(pci_setup_cardbus); config space writes, so it's quite possible that an I/O window of the bridge will have some undesirable address (e.g. 0) after the first write. Ditto 64-bit prefetchable MMIO. */ -static void pci_setup_bridge(struct pci_bus *bus) +static void pci_setup_bridge(struct pci_bus *bus, bool check_enabled) { struct pci_dev *bridge = bus->self; struct pci_bus_region region; u32 l, bu, lu, io_upper16; int pref_mem64; - if (pci_is_enabled(bridge)) + if (check_enabled && pci_is_enabled(bridge)) return; dev_info(&bridge->dev, "PCI bridge, secondary bus %04x:%02x\n", @@ -550,6 +588,35 @@ void __ref pci_bus_size_bridges(struct p } EXPORT_SYMBOL(pci_bus_size_bridges); +void __ref pci_bridge_assign_resources(const struct pci_dev *bridge) +{ + struct pci_bus *b; + + pdev_assign_resources_sorted((struct pci_dev *)bridge); + + b = bridge->subordinate; + if (!b) + return; + + pci_bus_assign_resources(b); + + switch (bridge->class >> 8) { + case PCI_CLASS_BRIDGE_PCI: + pci_setup_bridge(b, false); + 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; + } +} +EXPORT_SYMBOL(pci_bridge_assign_resources); + void __ref pci_bus_assign_resources(const struct pci_bus *bus) { struct pci_bus *b; @@ -566,7 +633,7 @@ void __ref pci_bus_assign_resources(cons switch (dev->class >> 8) { case PCI_CLASS_BRIDGE_PCI: - pci_setup_bridge(b); + pci_setup_bridge(b, true); break; case PCI_CLASS_BRIDGE_CARDBUS: Index: linux-2.6/include/linux/pci.h =================================================================== --- linux-2.6.orig/include/linux/pci.h +++ linux-2.6/include/linux/pci.h @@ -756,6 +756,7 @@ ssize_t pci_write_vpd(struct pci_dev *de int pci_vpd_truncate(struct pci_dev *dev, size_t size); /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */ +void pci_bridge_assign_resources(const struct pci_dev *bridge); void pci_bus_assign_resources(const struct pci_bus *bus); void pci_bus_size_bridges(struct pci_bus *bus); int pci_claim_resource(struct pci_dev *, int); -- 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/