From patchwork Wed Jun 19 16:56:12 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Petazzoni X-Patchwork-Id: 2750601 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 152689F96B for ; Wed, 19 Jun 2013 16:56:37 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E79A420419 for ; Wed, 19 Jun 2013 16:56:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C0FCB20225 for ; Wed, 19 Jun 2013 16:56:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934651Ab3FSQ4d (ORCPT ); Wed, 19 Jun 2013 12:56:33 -0400 Received: from mail.free-electrons.com ([94.23.35.102]:42358 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934462Ab3FSQ4c (ORCPT ); Wed, 19 Jun 2013 12:56:32 -0400 Received: by mail.free-electrons.com (Postfix, from userid 106) id 923707D2; Wed, 19 Jun 2013 18:56:31 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-8.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from localhost (LLagny-156-35-14-122.w80-14.abo.wanadoo.fr [80.14.126.122]) by mail.free-electrons.com (Postfix) with ESMTPSA id 96660786; Wed, 19 Jun 2013 18:56:30 +0200 (CEST) From: Thomas Petazzoni To: Bjorn Helgaas , linux-pci@vger.kernel.org, Russell King , Grant Likely , Rob Herring , Thomas Gleixner , Jason Cooper , Andrew Lunn , Gregory Clement Cc: Ezequiel Garcia , linux-arm-kernel@lists.infradead.org, Maen Suleiman , Lior Amsalem , Thierry Reding Subject: [PATCHv3 04/11] of: pci: add registry of MSI chips Date: Wed, 19 Jun 2013 18:56:12 +0200 Message-Id: <1371660979-21588-5-git-send-email-thomas.petazzoni@free-electrons.com> X-Mailer: git-send-email 1.8.1.2 In-Reply-To: <1371660979-21588-1-git-send-email-thomas.petazzoni@free-electrons.com> References: <1371660979-21588-1-git-send-email-thomas.petazzoni@free-electrons.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This commit adds a very basic registry of msi_chip structures, so that an IRQ controller driver can register an msi_chip, and a PCIe host controller can find it, based on a 'struct device_node'. Signed-off-by: Thomas Petazzoni --- drivers/of/of_pci.c | 22 ++++++++++++++++++++++ include/linux/msi.h | 2 ++ include/linux/of_pci.h | 4 ++++ 3 files changed, 28 insertions(+) diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c index 42c687a..ca12db8 100644 --- a/drivers/of/of_pci.c +++ b/drivers/of/of_pci.c @@ -89,3 +89,25 @@ int of_pci_parse_bus_range(struct device_node *node, struct resource *res) return 0; } EXPORT_SYMBOL_GPL(of_pci_parse_bus_range); + +static LIST_HEAD(msi_chip_list); +static DEFINE_MUTEX(msi_chip_mutex); + +void of_msi_chip_add(struct msi_chip *chip) +{ + mutex_lock(&msi_chip_mutex); + list_add(&chip->link, &msi_chip_list); + mutex_unlock(&msi_chip_mutex); +} + +struct msi_chip *of_msi_chip_find_by_node(struct device_node *of_node) +{ + struct msi_chip *c; + list_for_each_entry(c, &msi_chip_list, link) { + if (c->of_node == of_node && + of_property_read_bool(c->of_node, "msi-controller")) + return c; + } + + return NULL; +} diff --git a/include/linux/msi.h b/include/linux/msi.h index e3a137d..8b930c3 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -74,6 +74,8 @@ void default_restore_msi_irqs(struct pci_dev *dev, int irq); struct msi_chip { struct module *owner; struct device *dev; + struct device_node *of_node; + struct list_head link; int (*setup_irq)(struct msi_chip *chip, struct pci_dev *dev, struct msi_desc *desc); diff --git a/include/linux/of_pci.h b/include/linux/of_pci.h index 7a04826..6e88189 100644 --- a/include/linux/of_pci.h +++ b/include/linux/of_pci.h @@ -2,6 +2,7 @@ #define __OF_PCI_H #include +#include struct pci_dev; struct of_irq; @@ -13,4 +14,7 @@ struct device_node *of_pci_find_child_device(struct device_node *parent, int of_pci_get_devfn(struct device_node *np); int of_pci_parse_bus_range(struct device_node *node, struct resource *res); +void of_msi_chip_add(struct msi_chip *chip); +struct msi_chip *of_msi_chip_find_by_node(struct device_node *of_node); + #endif