Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932237AbaFII35 (ORCPT ); Mon, 9 Jun 2014 04:29:57 -0400 Received: from mga14.intel.com ([192.55.52.115]:36134 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755329AbaFIITd (ORCPT ); Mon, 9 Jun 2014 04:19:33 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,862,1389772800"; d="scan'208";a="352320247" From: Jiang Liu To: Benjamin Herrenschmidt , Thomas Gleixner , Grant Likely , Ingo Molnar , "H. Peter Anvin" , "Rafael J. Wysocki" , Bjorn Helgaas , Randy Dunlap , Yinghai Lu , x86@kernel.org, Jiang Liu Cc: Konrad Rzeszutek Wilk , Andrew Morton , Tony Luck , Joerg Roedel , Paul Gortmaker , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org, Ingo Molnar Subject: [Patch V4 15/42] x86, irq: reorganize IO_APIC_get_PCI_irq_vector() to prepare for irqdomain Date: Mon, 9 Jun 2014 16:19:44 +0800 Message-Id: <1402302011-23642-16-git-send-email-jiang.liu@linux.intel.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1402302011-23642-1-git-send-email-jiang.liu@linux.intel.com> References: <1402302011-23642-1-git-send-email-jiang.liu@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Reorganize function IO_APIC_get_PCI_irq_vector() a bit to better support coming irqdomain. Signed-off-by: Jiang Liu --- arch/x86/kernel/apic/io_apic.c | 61 ++++++++++++++++++++++------------------ 1 file changed, 33 insertions(+), 28 deletions(-) diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 0b2fb2aac7a6..4ca3151d26f9 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -997,7 +997,7 @@ static int pin_2_irq(int idx, int apic, int pin) int IO_APIC_get_PCI_irq_vector(int bus, int slot, int pin, struct io_apic_irq_attr *irq_attr) { - int ioapic_idx, i, best_guess = -1; + int irq, i, best_guess = -1; apic_printk(APIC_DEBUG, "querying PCI -> IRQ mapping bus:%d, slot:%d, pin:%d.\n", @@ -1007,41 +1007,46 @@ int IO_APIC_get_PCI_irq_vector(int bus, int slot, int pin, "PCI BIOS passed nonexistent PCI bus %d!\n", bus); return -1; } + for (i = 0; i < mp_irq_entries; i++) { int lbus = mp_irqs[i].srcbus; + int ioapic_idx, found = 0; + + if (bus != lbus || mp_irqs[i].irqtype != mp_INT || + slot != ((mp_irqs[i].srcbusirq >> 2) & 0x1f)) + continue; for_each_ioapic(ioapic_idx) if (mpc_ioapic_id(ioapic_idx) == mp_irqs[i].dstapic || - mp_irqs[i].dstapic == MP_APIC_ALL) + mp_irqs[i].dstapic == MP_APIC_ALL) { + found = 1; break; + } + if (!found) + continue; - if (!test_bit(lbus, mp_bus_not_pci) && - mp_irqs[i].irqtype == mp_INT && - (bus == lbus) && - (slot == ((mp_irqs[i].srcbusirq >> 2) & 0x1f))) { - int irq = pin_2_irq(i, ioapic_idx, mp_irqs[i].dstirq); - - if (!(ioapic_idx || IO_APIC_IRQ(irq))) - continue; + /* Skip ISA IRQs */ + irq = pin_2_irq(i, ioapic_idx, mp_irqs[i].dstirq); + if (ioapic_idx == 0 && !IO_APIC_IRQ(irq)) + continue; - if (pin == (mp_irqs[i].srcbusirq & 3)) { - set_io_apic_irq_attr(irq_attr, ioapic_idx, - mp_irqs[i].dstirq, - irq_trigger(i), - irq_polarity(i)); - return irq; - } - /* - * Use the first all-but-pin matching entry as a - * best-guess fuzzy result for broken mptables. - */ - if (best_guess < 0) { - set_io_apic_irq_attr(irq_attr, ioapic_idx, - mp_irqs[i].dstirq, - irq_trigger(i), - irq_polarity(i)); - best_guess = irq; - } + if (pin == (mp_irqs[i].srcbusirq & 3)) { + set_io_apic_irq_attr(irq_attr, ioapic_idx, + mp_irqs[i].dstirq, + irq_trigger(i), + irq_polarity(i)); + return irq; + } + /* + * Use the first all-but-pin matching entry as a + * best-guess fuzzy result for broken mptables. + */ + if (best_guess < 0) { + set_io_apic_irq_attr(irq_attr, ioapic_idx, + mp_irqs[i].dstirq, + irq_trigger(i), + irq_polarity(i)); + best_guess = irq; } } return best_guess; -- 1.7.10.4 -- 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/