From patchwork Wed Jun 29 08:27:36 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sinan Kaya X-Patchwork-Id: 9204403 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 7297B60757 for ; Wed, 29 Jun 2016 08:29:59 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6277F28635 for ; Wed, 29 Jun 2016 08:29:59 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 573BC28648; Wed, 29 Jun 2016 08:29:59 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 161AF28635 for ; Wed, 29 Jun 2016 08:29:59 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bIArJ-0008BZ-TR; Wed, 29 Jun 2016 08:28:33 +0000 Received: from smtp.codeaurora.org ([198.145.29.96]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bIArA-00081n-6x for linux-arm-kernel@lists.infradead.org; Wed, 29 Jun 2016 08:28:24 +0000 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 2A59761388; Wed, 29 Jun 2016 08:28:06 +0000 (UTC) Received: from drakthul.qualcomm.com (global_nat1_iad_fw.qualcomm.com [129.46.232.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: okaya@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 7371360F78; Wed, 29 Jun 2016 08:28:03 +0000 (UTC) From: Sinan Kaya To: linux-acpi@vger.kernel.org, timur@codeaurora.org, cov@codeaurora.org, jcm@redhat.com, alex.williamson@redhat.com, eric.auger@redhat.com Subject: [PATCH V2 2/4] Revert "ACPI, PCI, IRQ: remove redundant code in acpi_irq_penalty_init()" Date: Wed, 29 Jun 2016 04:27:36 -0400 Message-Id: <1467188859-28188-3-git-send-email-okaya@codeaurora.org> X-Mailer: git-send-email 1.8.2.1 In-Reply-To: <1467188859-28188-1-git-send-email-okaya@codeaurora.org> References: <1467188859-28188-1-git-send-email-okaya@codeaurora.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160629_012824_299402_78AA7C77 X-CRM114-Status: GOOD ( 16.17 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: x86@kernel.org, "H. Peter Anvin" , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, agross@codeaurora.org, "Rafael J. Wysocki" , tiwai@suse.com, perex@perex.cz, Sinan Kaya , Robert Moore , Ingo Molnar , Lv Zheng , linux-arm-msm@vger.kernel.org, Bjorn Helgaas , wim@djo.tudelft.nl, devel@acpica.org, Thomas Gleixner , linux-arm-kernel@lists.infradead.org, Len Brown MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Trying to make the ISA and PCI init functionality common turned out to be a bad idea. ISA path depends on external functionality. Restoring the previous behavior and limiting the refactoring to PCI interrupts only. This reverts commit 1fcb6a813c4f ("ACPI,PCI,IRQ: remove redundant code in acpi_irq_penalty_init()"). Signed-off-by: Sinan Kaya --- arch/x86/pci/acpi.c | 1 + drivers/acpi/pci_link.c | 36 ++++++++++++++++++++++++++++++++++++ include/acpi/acpi_drivers.h | 1 + 3 files changed, 38 insertions(+) diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c index b2a4e2a..3cd6983 100644 --- a/arch/x86/pci/acpi.c +++ b/arch/x86/pci/acpi.c @@ -396,6 +396,7 @@ int __init pci_acpi_init(void) return -ENODEV; printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n"); + acpi_irq_penalty_init(); pcibios_enable_irq = acpi_pci_irq_enable; pcibios_disable_irq = acpi_pci_irq_disable; x86_init.pci.init_irq = x86_init_noop; diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c index f2b69e3..714ba4d 100644 --- a/drivers/acpi/pci_link.c +++ b/drivers/acpi/pci_link.c @@ -517,6 +517,42 @@ static int acpi_irq_get_penalty(int irq) return penalty; } +int __init acpi_irq_penalty_init(void) +{ + struct acpi_pci_link *link; + int i; + + /* + * Update penalties to facilitate IRQ balancing. + */ + list_for_each_entry(link, &acpi_link_list, list) { + + /* + * reflect the possible and active irqs in the penalty table -- + * useful for breaking ties. + */ + if (link->irq.possible_count) { + int penalty = + PIRQ_PENALTY_PCI_POSSIBLE / + link->irq.possible_count; + + for (i = 0; i < link->irq.possible_count; i++) { + if (link->irq.possible[i] < ACPI_MAX_ISA_IRQS) + acpi_isa_irq_penalty[link->irq. + possible[i]] += + penalty; + } + + } else if (link->irq.active && + (link->irq.active < ACPI_MAX_ISA_IRQS)) { + acpi_isa_irq_penalty[link->irq.active] += + PIRQ_PENALTY_PCI_POSSIBLE; + } + } + + return 0; +} + static int acpi_irq_balance = -1; /* 0: static, 1: balance */ static int acpi_pci_link_allocate(struct acpi_pci_link *link) diff --git a/include/acpi/acpi_drivers.h b/include/acpi/acpi_drivers.h index 797ae2e..29c6912 100644 --- a/include/acpi/acpi_drivers.h +++ b/include/acpi/acpi_drivers.h @@ -78,6 +78,7 @@ /* ACPI PCI Interrupt Link (pci_link.c) */ +int acpi_irq_penalty_init(void); int acpi_pci_link_allocate_irq(acpi_handle handle, int index, int *triggering, int *polarity, char **name); int acpi_pci_link_free_irq(acpi_handle handle);