From patchwork Mon Dec 8 20:12:19 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 418855 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 875B714011B for ; Tue, 9 Dec 2014 07:13:58 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755206AbaLHUNn (ORCPT ); Mon, 8 Dec 2014 15:13:43 -0500 Received: from foss-mx-na.foss.arm.com ([217.140.108.86]:46536 "EHLO foss-mx-na.foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754634AbaLHUMe (ORCPT ); Mon, 8 Dec 2014 15:12:34 -0500 Received: from foss-smtp-na-1.foss.arm.com (unknown [10.80.61.8]) by foss-mx-na.foss.arm.com (Postfix) with ESMTP id CE08B4E0; Mon, 8 Dec 2014 14:12:30 -0600 (CST) Received: from collaborate-mta1.arm.com (highbank-bc01-b06.austin.arm.com [10.112.81.134]) by foss-smtp-na-1.foss.arm.com (Postfix) with ESMTP id 8FEA95FAD7; Mon, 8 Dec 2014 14:12:28 -0600 (CST) Received: from approximate.cambridge.arm.com (approximate.cambridge.arm.com [10.1.209.28]) by collaborate-mta1.arm.com (Postfix) with ESMTP id 3EDCB13F697; Mon, 8 Dec 2014 14:12:27 -0600 (CST) From: Marc Zyngier To: Bjorn Helgaas , Thomas Gleixner , Jiang Liu Cc: , , , Will Deacon , Yijing Wang , Suravee Suthikulpanit Subject: [PATCH 2/6] PCI/MSI: add hooks to populate the msi_domain field Date: Mon, 8 Dec 2014 20:12:19 +0000 Message-Id: <1418069543-21969-3-git-send-email-marc.zyngier@arm.com> X-Mailer: git-send-email 2.1.3 In-Reply-To: <1418069543-21969-1-git-send-email-marc.zyngier@arm.com> References: <1418069543-21969-1-git-send-email-marc.zyngier@arm.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org In order to be able to populate the device msi_domain field, add the necesary hooks to propagate the PHB msi_domain across secondary busses to devices. So far, nobody populates the initial msi_domain. Signed-off-by: Marc Zyngier --- drivers/pci/probe.c | 24 ++++++++++++++++++++++++ include/linux/pci.h | 1 + 2 files changed, 25 insertions(+) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index c8ca98c..d1009a2 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -670,6 +670,20 @@ static void pci_set_bus_speed(struct pci_bus *bus) } } +void __weak pcibios_set_phb_msi_domain(struct pci_bus *bus) +{ +} + +static void pci_set_bus_msi_domain(struct pci_bus *bus) +{ + struct pci_dev *bridge = bus->self; + + if (!bridge) + pcibios_set_phb_msi_domain(bus); + else + dev_set_msi_domain(&bus->dev, dev_get_msi_domain(&bridge->dev)); +} + static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent, struct pci_dev *bridge, int busnr) { @@ -723,6 +737,7 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent, bridge->subordinate = child; add_dev: + pci_set_bus_msi_domain(child); ret = device_register(&child->dev); WARN_ON(ret < 0); @@ -1517,6 +1532,11 @@ static void pci_init_capabilities(struct pci_dev *dev) pci_enable_acs(dev); } +static void pci_set_msi_domain(struct pci_dev *dev) +{ + dev_set_msi_domain(&dev->dev, dev_get_msi_domain(&dev->bus->dev)); +} + void pci_device_add(struct pci_dev *dev, struct pci_bus *bus) { int ret; @@ -1546,6 +1566,9 @@ void pci_device_add(struct pci_dev *dev, struct pci_bus *bus) /* Initialize various capabilities */ pci_init_capabilities(dev); + /* Setup MSI irq domain */ + pci_set_msi_domain(dev); + /* * Add the device to our list of discovered devices * and the bus list for fixup functions, etc. @@ -1947,6 +1970,7 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus, b->bridge = get_device(&bridge->dev); device_enable_async_suspend(b->bridge); pci_set_bus_of_node(b); + pci_set_bus_msi_domain(b); if (!parent) set_dev_node(b->bridge, pcibus_to_node(b)); diff --git a/include/linux/pci.h b/include/linux/pci.h index a523cee..3266764 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1637,6 +1637,7 @@ int pcibios_set_pcie_reset_state(struct pci_dev *dev, int pcibios_add_device(struct pci_dev *dev); void pcibios_release_device(struct pci_dev *dev); void pcibios_penalize_isa_irq(int irq, int active); +void pcibios_set_phb_msi_domain(struct pci_bus *bus); #ifdef CONFIG_HIBERNATE_CALLBACKS extern struct dev_pm_ops pcibios_pm_ops;