Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751963AbcJARq4 (ORCPT ); Sat, 1 Oct 2016 13:46:56 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:51598 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751816AbcJARqf (ORCPT ); Sat, 1 Oct 2016 13:46:35 -0400 DMARC-Filter: OpenDMARC Filter v1.3.1 smtp.codeaurora.org 378A561AF4 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=pass smtp.mailfrom=okaya@codeaurora.org From: Sinan Kaya To: linux-acpi@vger.kernel.org, rjw@rjwysocki.net, bhelgaas@google.com, ravikanth.nalla@hpe.com, linux@rainbow-software.org, timur@codeaurora.org, cov@codeaurora.org, jcm@redhat.com, alex.williamson@redhat.com Cc: linux-pci@vger.kernel.org, agross@codeaurora.org, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, wim@djo.tudelft.nl, Sinan Kaya , Len Brown , Pavel Machek , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , x86@kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/3] Revert "ACPI,PCI,IRQ: remove SCI penalize function" Date: Sat, 1 Oct 2016 13:46:16 -0400 Message-Id: <1475343976-20744-3-git-send-email-okaya@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1475343976-20744-1-git-send-email-okaya@codeaurora.org> References: <1475343976-20744-1-git-send-email-okaya@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3234 Lines: 95 This reverts commit 9e5ed6d1fb87 ("ACPI,PCI,IRQ: remove SCI penalize function"). SCI penalty API was replaced by the runtime penalty calculation based on the value of acpi_gbl_FADT.sci_interrupt. acpi_gbl_FADT.sci_interrupt type does not get updated at the right time for some platforms and results in incorrect penalty assignment for PCI IRQs as irq_get_trigger_type returns the wrong type. Link: http://www.spinics.net/lists/linux-pci/msg54599.html Signed-off-by: Sinan Kaya --- arch/x86/kernel/acpi/boot.c | 1 + drivers/acpi/pci_link.c | 34 ++++++++++++++-------------------- include/linux/acpi.h | 1 + 3 files changed, 16 insertions(+), 20 deletions(-) diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index 90d84c3..0ffd26e 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -453,6 +453,7 @@ static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); + acpi_penalize_sci_irq(bus_irq, trigger, polarity); /* * stash over-ride to indicate we've been here diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c index 06c2a11..6a2af19 100644 --- a/drivers/acpi/pci_link.c +++ b/drivers/acpi/pci_link.c @@ -495,27 +495,10 @@ static int acpi_irq_pci_sharing_penalty(int irq) static int acpi_irq_get_penalty(int irq) { - int penalty = 0; - - /* - * Penalize IRQ used by ACPI SCI. If ACPI SCI pin attributes conflict - * with PCI IRQ attributes, mark ACPI SCI as ISA_ALWAYS so it won't be - * use for PCI IRQs. - */ - if (irq == acpi_gbl_FADT.sci_interrupt) { - u32 type = irq_get_trigger_type(irq) & IRQ_TYPE_SENSE_MASK; - - if (type != IRQ_TYPE_LEVEL_LOW) - penalty += PIRQ_PENALTY_ISA_ALWAYS; - else - penalty += PIRQ_PENALTY_PCI_USING; - } - - if (irq < ACPI_MAX_ISA_IRQS) - return penalty + acpi_irq_penalty[irq]; + if (irq < ACPI_MAX_IRQS) + return acpi_irq_penalty[irq]; - penalty += acpi_irq_pci_sharing_penalty(irq); - return penalty; + return acpi_irq_pci_sharing_penalty(irq); } int __init acpi_irq_penalty_init(void) @@ -886,6 +869,17 @@ bool acpi_isa_irq_available(int irq) acpi_irq_get_penalty(irq) < PIRQ_PENALTY_ISA_ALWAYS); } +void acpi_penalize_sci_irq(int irq, int trigger, int polarity) +{ + if (irq >= 0 && irq < ARRAY_SIZE(acpi_irq_penalty)) { + if (trigger != ACPI_MADT_TRIGGER_LEVEL || + polarity != ACPI_MADT_POLARITY_ACTIVE_LOW) + acpi_irq_penalty[irq] += PIRQ_PENALTY_ISA_ALWAYS; + else + acpi_irq_penalty[irq] += PIRQ_PENALTY_PCI_USING; + } +} + /* * Over-ride default table to reserve additional IRQs for use by ISA * e.g. acpi_irq_isa=5 diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 4d8452c..85ac7d5 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -318,6 +318,7 @@ struct pci_dev; int acpi_pci_irq_enable (struct pci_dev *dev); void acpi_penalize_isa_irq(int irq, int active); bool acpi_isa_irq_available(int irq); +void acpi_penalize_sci_irq(int irq, int trigger, int polarity); void acpi_pci_irq_disable (struct pci_dev *dev); extern int ec_read(u8 addr, u8 *val); -- 1.9.1