From patchwork Thu Apr 30 08:23:38 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinghai Lu X-Patchwork-Id: 20982 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 n3U8ODuj028651 for ; Thu, 30 Apr 2009 08:24:14 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761656AbZD3IYM (ORCPT ); Thu, 30 Apr 2009 04:24:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1761650AbZD3IYM (ORCPT ); Thu, 30 Apr 2009 04:24:12 -0400 Received: from hera.kernel.org ([140.211.167.34]:56049 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752125AbZD3IYI (ORCPT ); Thu, 30 Apr 2009 04:24:08 -0400 Received: from [192.168.101.6] (adsl-75-36-240-86.dsl.pltn13.sbcglobal.net [75.36.240.86]) (authenticated bits=0) by hera.kernel.org (8.14.2/8.13.8) with ESMTP id n3U8Npbp025504 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 30 Apr 2009 08:23:51 GMT Message-ID: <49F9600A.7000705@kernel.org> Date: Thu, 30 Apr 2009 01:23:38 -0700 From: Yinghai Lu User-Agent: Thunderbird 2.0.0.19 (X11/20081227) MIME-Version: 1.0 To: Ingo Molnar , Thomas Gleixner , "H. Peter Anvin" , Jesse Barnes CC: "linux-kernel@vger.kernel.org" , linux-pci@vger.kernel.org Subject: [PATCH 4/4] x86/pci: update pirq_enable_irq to setup io apic routing References: <49F8B2D9.3080903@kernel.org> In-Reply-To: <49F8B2D9.3080903@kernel.org> X-Virus-Scanned: ClamAV 0.93.3/9306/Thu Apr 30 01:47:06 2009 on hera.kernel.org X-Virus-Status: Clean Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org so we could set io apic routing only when enable device irq. also could make setup_IO_APIC_irqs and setup_ioapic_dest only handle first ioapic... [ make mptable irq enable more like acpi is used ] Signed-off-by: Yinghai Lu --- arch/x86/kernel/apic/io_apic.c | 157 ++++++++++++++++++----------------------- arch/x86/pci/irq.c | 92 ++++++++---------------- 2 files changed, 103 insertions(+), 146 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Index: linux-2.6/arch/x86/kernel/apic/io_apic.c =================================================================== --- linux-2.6.orig/arch/x86/kernel/apic/io_apic.c +++ linux-2.6/arch/x86/kernel/apic/io_apic.c @@ -1481,75 +1481,67 @@ static void setup_IO_APIC_irq(int apic_i ioapic_write_entry(apic_id, pin, entry); } +static struct { + DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1); +} mp_ioapic_routing[MAX_IO_APICS]; + static void __init setup_IO_APIC_irqs(void) { - int apic_id, pin, idx, irq; + int apic_id = 0, pin, idx, irq; int notcon = 0; struct irq_desc *desc; struct irq_cfg *cfg; int node = cpu_to_node(boot_cpu_id); - int ioapic_start = 0, ioapic_end = nr_ioapics; apic_printk(APIC_VERBOSE, KERN_DEBUG "init IO_APIC IRQs\n"); #ifdef CONFIG_ACPI - /* - * when acpi is used, at this point, we only have legacy entries - * in mp_irqs[] by mp_config_acpi_legacy_irqs/mp_override_legacy_irq - * so only setup for that ioapic, and will not print out those strange - * not connected on other ioapic - */ if (!acpi_disabled && acpi_ioapic) { - ioapic_start = mp_find_ioapic(0); - if (ioapic_start < 0) - ioapic_start = 0; - else - ioapic_end = ioapic_start + 1; + apic_id = mp_find_ioapic(0); + if (apic_id < 0) + apic_id = 0; } #endif - for (apic_id = ioapic_start; apic_id < ioapic_end; apic_id++) { - for (pin = 0; pin < nr_ioapic_registers[apic_id]; pin++) { - - idx = find_irq_entry(apic_id, pin, mp_INT); - if (idx == -1) { - if (!notcon) { - notcon = 1; - apic_printk(APIC_VERBOSE, - KERN_DEBUG " %d-%d", - mp_ioapics[apic_id].apicid, pin); - } else - apic_printk(APIC_VERBOSE, " %d-%d", - mp_ioapics[apic_id].apicid, pin); - continue; - } - if (notcon) { + for (pin = 0; pin < nr_ioapic_registers[apic_id]; pin++) { + idx = find_irq_entry(apic_id, pin, mp_INT); + if (idx == -1) { + if (!notcon) { + notcon = 1; apic_printk(APIC_VERBOSE, - " (apicid-pin) not connected\n"); - notcon = 0; - } + KERN_DEBUG " %d-%d", + mp_ioapics[apic_id].apicid, pin); + } else + apic_printk(APIC_VERBOSE, " %d-%d", + mp_ioapics[apic_id].apicid, pin); + continue; + } + if (notcon) { + apic_printk(APIC_VERBOSE, + " (apicid-pin) not connected\n"); + notcon = 0; + } - irq = pin_2_irq(idx, apic_id, pin); + irq = pin_2_irq(idx, apic_id, pin); - /* - * Skip the timer IRQ if there's a quirk handler - * installed and if it returns 1: - */ - if (apic->multi_timer_check && - apic->multi_timer_check(apic_id, irq)) - continue; - - desc = irq_to_desc_alloc_node(irq, node); - if (!desc) { - printk(KERN_INFO "can not get irq_desc for %d\n", irq); - continue; - } - cfg = desc->chip_data; - add_pin_to_irq_node(cfg, node, apic_id, pin); + /* + * Skip the timer IRQ if there's a quirk handler + * installed and if it returns 1: + */ + if (apic->multi_timer_check && + apic->multi_timer_check(apic_id, irq)) + continue; - setup_IO_APIC_irq(apic_id, pin, irq, desc, - irq_trigger(idx), irq_polarity(idx)); + desc = irq_to_desc_alloc_node(irq, node); + if (!desc) { + printk(KERN_INFO "can not get irq_desc for %d\n", irq); + continue; } + cfg = desc->chip_data; + add_pin_to_irq_node(cfg, node, apic_id, pin); + set_bit(pin, mp_ioapic_routing[apic_id].pin_programmed); + setup_IO_APIC_irq(apic_id, pin, irq, desc, + irq_trigger(idx), irq_polarity(idx)); } if (notcon) @@ -3892,10 +3884,6 @@ static int __io_apic_set_pci_routing(str return 0; } -static struct { - DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1); -} mp_ioapic_routing[MAX_IO_APICS]; - int io_apic_set_pci_routing(struct device *dev, int ioapic, int pin, int irq, int triggering, int polarity) { @@ -4039,51 +4027,44 @@ int acpi_get_override_irq(int bus_irq, i #ifdef CONFIG_SMP void __init setup_ioapic_dest(void) { - int pin, ioapic, irq, irq_entry; + int pin, ioapic = 0, irq, irq_entry; struct irq_desc *desc; - struct irq_cfg *cfg; const struct cpumask *mask; if (skip_ioapic_setup == 1) return; - for (ioapic = 0; ioapic < nr_ioapics; ioapic++) { - for (pin = 0; pin < nr_ioapic_registers[ioapic]; pin++) { - irq_entry = find_irq_entry(ioapic, pin, mp_INT); - if (irq_entry == -1) - continue; - irq = pin_2_irq(irq_entry, ioapic, pin); - - /* setup_IO_APIC_irqs could fail to get vector for some device - * when you have too many devices, because at that time only boot - * cpu is online. - */ - desc = irq_to_desc(irq); - cfg = desc->chip_data; - if (!cfg->vector) { - setup_IO_APIC_irq(ioapic, pin, irq, desc, - irq_trigger(irq_entry), - irq_polarity(irq_entry)); - continue; +#ifdef CONFIG_ACPI + if (!acpi_disabled && acpi_ioapic) { + ioapic = mp_find_ioapic(0); + if (ioapic < 0) + ioapic = 0; + } +#endif - } + for (pin = 0; pin < nr_ioapic_registers[ioapic]; pin++) { + irq_entry = find_irq_entry(ioapic, pin, mp_INT); + if (irq_entry == -1) + continue; + irq = pin_2_irq(irq_entry, ioapic, pin); - /* - * Honour affinities which have been set in early boot - */ - if (desc->status & - (IRQ_NO_BALANCING | IRQ_AFFINITY_SET)) - mask = desc->affinity; - else - mask = apic->target_cpus(); + desc = irq_to_desc(irq); - if (intr_remapping_enabled) - set_ir_ioapic_affinity_irq_desc(desc, mask); - else - set_ioapic_affinity_irq_desc(desc, mask); - } + /* + * Honour affinities which have been set in early boot + */ + if (desc->status & + (IRQ_NO_BALANCING | IRQ_AFFINITY_SET)) + mask = desc->affinity; + else + mask = apic->target_cpus(); + if (intr_remapping_enabled) + set_ir_ioapic_affinity_irq_desc(desc, mask); + else + set_ioapic_affinity_irq_desc(desc, mask); } + } #endif Index: linux-2.6/arch/x86/pci/irq.c =================================================================== --- linux-2.6.orig/arch/x86/pci/irq.c +++ linux-2.6/arch/x86/pci/irq.c @@ -889,6 +889,9 @@ static int pcibios_lookup_irq(struct pci return 0; } + if (io_apic_assign_pci_irqs) + return 0; + /* Find IRQ routing entry */ if (!pirq_table) @@ -1039,63 +1042,15 @@ static void __init pcibios_fixup_irqs(vo pirq_penalty[dev->irq]++; } + if (io_apic_assign_pci_irqs) + return; + dev = NULL; while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin); if (!pin) continue; -#ifdef CONFIG_X86_IO_APIC - /* - * Recalculate IRQ numbers if we use the I/O APIC. - */ - if (io_apic_assign_pci_irqs) { - int irq; - int ioapic = -1, ioapic_pin = -1; - int triggering, polarity; - - /* - * interrupt pins are numbered starting from 1 - */ - irq = IO_APIC_get_PCI_irq_vector(dev->bus->number, - PCI_SLOT(dev->devfn), pin - 1, - &ioapic, &ioapic_pin, - &triggering, &polarity); - /* - * Busses behind bridges are typically not listed in the - * MP-table. In this case we have to look up the IRQ - * based on the parent bus, parent slot, and pin number. - * The SMP code detects such bridged busses itself so we - * should get into this branch reliably. - */ - if (irq < 0 && dev->bus->parent) { - /* go back to the bridge */ - struct pci_dev *bridge = dev->bus->self; - int bus; - - pin = pci_swizzle_interrupt_pin(dev, pin); - bus = bridge->bus->number; - irq = IO_APIC_get_PCI_irq_vector(bus, - PCI_SLOT(bridge->devfn), - pin - 1, - &ioapic, &ioapic_pin, - &triggering, &polarity); - if (irq >= 0) - dev_warn(&dev->dev, - "using bridge %s INT %c to " - "get IRQ %d\n", - pci_name(bridge), - 'A' + pin - 1, irq); - } - if (irq >= 0) { - dev_info(&dev->dev, - "PCI->APIC IRQ transform: INT %c " - "-> IRQ %d\n", - 'A' + pin - 1, irq); - dev->irq = irq; - } - } -#endif /* * Still no IRQ? Try to lookup one... */ @@ -1190,6 +1145,19 @@ int __init pcibios_irq_init(void) pcibios_enable_irq = pirq_enable_irq; pcibios_fixup_irqs(); + + if (io_apic_assign_pci_irqs && pci_routeirq) { + struct pci_dev *dev = NULL; + /* + * PCI IRQ routing is set up by pci_enable_device(), but we + * also do it here in case there are still broken drivers that + * don't use pci_enable_device(). + */ + printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n"); + for_each_pci_dev(dev) + pirq_enable_irq(dev); + } + return 0; } @@ -1220,22 +1188,25 @@ void pcibios_penalize_isa_irq(int irq, i static int pirq_enable_irq(struct pci_dev *dev) { u8 pin; - struct pci_dev *temp_dev; pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin); - if (pin && !pcibios_lookup_irq(dev, 1) && !dev->irq) { + if (pin && !pcibios_lookup_irq(dev, 1)) { char *msg = ""; + if (!io_apic_assign_pci_irqs && dev->irq) + return 0; + if (io_apic_assign_pci_irqs) { +#ifdef CONFIG_X86_IO_APIC + struct pci_dev *temp_dev; int irq; int ioapic = -1, ioapic_pin = -1; int triggering, polarity; irq = IO_APIC_get_PCI_irq_vector(dev->bus->number, - PCI_SLOT(dev->devfn), - pin - 1, - &ioapic, &ioapic_pin, - &triggering, &polarity); + PCI_SLOT(dev->devfn), pin - 1, + &ioapic, &ioapic_pin, + &triggering, &polarity); /* * Busses behind bridges are typically not listed in the MP-table. * In this case we have to look up the IRQ based on the parent bus, @@ -1261,12 +1232,17 @@ static int pirq_enable_irq(struct pci_de } dev = temp_dev; if (irq >= 0) { + dev->irq = irq; + io_apic_set_pci_routing(&dev->dev, ioapic, + ioapic_pin, irq, + triggering, polarity); + dev_info(&dev->dev, "PCI->APIC IRQ transform: " "INT %c -> IRQ %d\n", 'A' + pin - 1, irq); - dev->irq = irq; return 0; } else msg = "; probably buggy MP table"; +#endif } else if (pci_probe & PCI_BIOS_IRQ_SCAN) msg = ""; else