From patchwork Wed Jul 15 12:16:39 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 6797841 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 59AFDC05AC for ; Wed, 15 Jul 2015 12:21:01 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 72FE92055A for ; Wed, 15 Jul 2015 12:21:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6FD8520531 for ; Wed, 15 Jul 2015 12:20:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753111AbbGOMRO (ORCPT ); Wed, 15 Jul 2015 08:17:14 -0400 Received: from foss.arm.com ([217.140.101.70]:38681 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752825AbbGOMRL (ORCPT ); Wed, 15 Jul 2015 08:17:11 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 1A4E15E2; Wed, 15 Jul 2015 05:17:31 -0700 (PDT) Received: from approximate.cambridge.arm.com (approximate.cambridge.arm.com [10.1.209.148]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 1D5663F23A; Wed, 15 Jul 2015 05:17:08 -0700 (PDT) From: Marc Zyngier To: Bjorn Helgaas , Thomas Gleixner , Jiang Liu , Jason Cooper Cc: , , , Yijing Wang , Ma Jun , Lorenzo Pieralisi , Duc Dang Subject: [PATCH v4 05/19] PCI/MSI: of: Add support for OF-provided msi_domain Date: Wed, 15 Jul 2015 13:16:39 +0100 Message-Id: <1436962613-17359-6-git-send-email-marc.zyngier@arm.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1436962613-17359-1-git-send-email-marc.zyngier@arm.com> References: <1436962613-17359-1-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 X-Spam-Status: No, score=-8.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP In order to populate the PHB msi_domain, use the "msi-parent" attribute to lookup a corresponding irq domain. If found, this is our MSI domain. This gets plugged into the core PCI code. Signed-off-by: Marc Zyngier --- drivers/pci/of.c | 19 +++++++++++++++++++ drivers/pci/probe.c | 1 + include/linux/pci.h | 2 ++ 3 files changed, 22 insertions(+) diff --git a/drivers/pci/of.c b/drivers/pci/of.c index f092993..09df465 100644 --- a/drivers/pci/of.c +++ b/drivers/pci/of.c @@ -9,6 +9,7 @@ * 2 of the License, or (at your option) any later version. */ +#include #include #include #include @@ -59,3 +60,21 @@ struct device_node * __weak pcibios_get_phb_of_node(struct pci_bus *bus) return of_node_get(bus->bridge->parent->of_node); return NULL; } + +void pci_set_phb_of_msi_domain(struct pci_bus *bus) +{ +#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN + struct device_node *np; + struct irq_domain *d; + + if (!bus->dev.of_node) + return; + np = of_parse_phandle(bus->dev.of_node, "msi-parent", 0); + if (!np) + return; + d = irq_find_matching_host(np, DOMAIN_BUS_PCI_MSI); + if (!d) + d = irq_find_host(np); + dev_set_msi_domain(&bus->dev, d); +#endif +} diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 376f6fa..c80626f 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -663,6 +663,7 @@ static void pci_set_bus_speed(struct pci_bus *bus) void __weak pcibios_set_host_bridge_msi_domain(struct pci_bus *bus) { + pci_set_phb_of_msi_domain(bus); } static void pci_set_bus_msi_domain(struct pci_bus *bus) diff --git a/include/linux/pci.h b/include/linux/pci.h index fe0825f..b3ad3d4 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1846,6 +1846,7 @@ void pci_set_of_node(struct pci_dev *dev); void pci_release_of_node(struct pci_dev *dev); void pci_set_bus_of_node(struct pci_bus *bus); void pci_release_bus_of_node(struct pci_bus *bus); +void pci_set_phb_of_msi_domain(struct pci_bus *bus); /* Arch may override this (weak) */ struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus); @@ -1868,6 +1869,7 @@ static inline void pci_set_bus_of_node(struct pci_bus *bus) { } static inline void pci_release_bus_of_node(struct pci_bus *bus) { } static inline struct device_node * pci_device_to_OF_node(const struct pci_dev *pdev) { return NULL; } +static inline void pci_set_phb_of_msi_domain(struct pci_bus *bus) { } #endif /* CONFIG_OF */ #ifdef CONFIG_EEH