Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932821AbbGGRSn (ORCPT ); Tue, 7 Jul 2015 13:18:43 -0400 Received: from foss.arm.com ([217.140.101.70]:36947 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932772AbbGGRS2 (ORCPT ); Tue, 7 Jul 2015 13:18:28 -0400 From: Marc Zyngier To: Bjorn Helgaas , Thomas Gleixner , Jiang Liu , Jason Cooper Cc: , , , Yijing Wang , Ma Jun , Lorenzo Pieralisi Subject: [PATCH v3 04/15] PCI/MSI: Add hooks to populate the msi_domain field Date: Tue, 7 Jul 2015 18:17:54 +0100 Message-Id: <1436289485-28230-5-git-send-email-marc.zyngier@arm.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1436289485-28230-1-git-send-email-marc.zyngier@arm.com> References: <1436289485-28230-1-git-send-email-marc.zyngier@arm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3090 Lines: 101 In order to be able to populate the device msi_domain field, add the necesary hooks to propagate the host bridge msi_domain across secondary busses to devices. So far, nobody populates the initial msi_domain. Signed-off-by: Marc Zyngier --- drivers/pci/probe.c | 30 ++++++++++++++++++++++++++++++ include/linux/pci.h | 1 + 2 files changed, 31 insertions(+) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index cefd636..376f6fa 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -661,6 +661,20 @@ static void pci_set_bus_speed(struct pci_bus *bus) } } +void __weak pcibios_set_host_bridge_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_host_bridge_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) { @@ -714,6 +728,7 @@ 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); @@ -1544,6 +1559,17 @@ static void pci_init_capabilities(struct pci_dev *dev) pci_enable_acs(dev); } +static void pci_set_msi_domain(struct pci_dev *dev) +{ + /* + * If no domain has been set through the pcibios callback, + * inherit the default from the bus device. + */ + if (!dev_get_msi_domain(&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; @@ -1585,6 +1611,9 @@ void pci_device_add(struct pci_dev *dev, struct pci_bus *bus) ret = pcibios_add_device(dev); WARN_ON(ret < 0); + /* Setup MSI irq domain */ + pci_set_msi_domain(dev); + /* Notifier could use PCI capabilities */ dev->match_driver = false; ret = device_add(&dev->dev); @@ -1975,6 +2004,7 @@ 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 8a0321a..3622453 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1645,6 +1645,7 @@ 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_host_bridge_msi_domain(struct pci_bus *bus); #ifdef CONFIG_HIBERNATE_CALLBACKS extern struct dev_pm_ops pcibios_pm_ops; -- 2.1.4 -- 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/