From patchwork Thu Jun 8 14:13:14 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Pieralisi X-Patchwork-Id: 9775507 X-Patchwork-Delegate: bhelgaas@google.com 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 9C15960350 for ; Thu, 8 Jun 2017 14:13:42 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8D6A1283FD for ; Thu, 8 Jun 2017 14:13:42 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 81B122855C; Thu, 8 Jun 2017 14:13:42 +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=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E3F82283FD for ; Thu, 8 Jun 2017 14:13:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751454AbdFHONl (ORCPT ); Thu, 8 Jun 2017 10:13:41 -0400 Received: from foss.arm.com ([217.140.101.70]:50414 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751450AbdFHONk (ORCPT ); Thu, 8 Jun 2017 10:13:40 -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 21949164F; Thu, 8 Jun 2017 07:13:40 -0700 (PDT) Received: from red-moon.cambridge.arm.com (red-moon.cambridge.arm.com [10.1.206.55]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 9BD173F3E1; Thu, 8 Jun 2017 07:13:35 -0700 (PDT) From: Lorenzo Pieralisi To: linux-pci@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, Lorenzo Pieralisi , Bjorn Helgaas , Simon Horman , Arnd Bergmann , Will Deacon , Russell King , Pratyush Anand , Jingoo Han , Rob Herring , Mingkai Hu , Tanmay Inamdar , Murali Karicheri , Bharat Kumar Gogada , Wenrui Li , Shawn Lin , Minghuan Lian , Gabriele Paoloni , Thomas Petazzoni , Joao Pinto , Thierry Reding , Michal Simek , Stanimir Varbanov , Zhou Wang , Roy Zang , Matthew Minter , Linus Walleij Subject: [RFT PATCH v2 14/42] PCI: rcar: Convert PCI scan API to pci_scan_root_bus_bridge() Date: Thu, 8 Jun 2017 15:13:14 +0100 Message-Id: <20170608141342.2018-15-lorenzo.pieralisi@arm.com> X-Mailer: git-send-email 2.10.0 In-Reply-To: <20170608141342.2018-1-lorenzo.pieralisi@arm.com> References: <20170608141342.2018-1-lorenzo.pieralisi@arm.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 The introduction of pci_scan_root_bus_bridge() provides a PCI core API to scan a PCI root bus backed by an already initialized struct pci_host_bridge object, which simplifies the bus scan interface and makes the PCI scan root bus interface easier to generalize as members are added to the struct pci_host_bridge. Convert PCI rcar host code to pci_scan_root_bus_bridge() to improve the PCI root bus scanning interface. Signed-off-by: Lorenzo Pieralisi Cc: Bjorn Helgaas Cc: Simon Horman --- drivers/pci/host/pcie-rcar.c | 38 ++++++++++++++++++++++++-------------- 1 file changed, 24 insertions(+), 14 deletions(-) diff --git a/drivers/pci/host/pcie-rcar.c b/drivers/pci/host/pcie-rcar.c index cb07c45..8380274 100644 --- a/drivers/pci/host/pcie-rcar.c +++ b/drivers/pci/host/pcie-rcar.c @@ -450,28 +450,32 @@ static void rcar_pcie_force_speedup(struct rcar_pcie *pcie) static int rcar_pcie_enable(struct rcar_pcie *pcie) { struct device *dev = pcie->dev; + struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie); struct pci_bus *bus, *child; - LIST_HEAD(res); + int ret; /* Try setting 5 GT/s link speed */ rcar_pcie_force_speedup(pcie); - rcar_pcie_setup(&res, pcie); + rcar_pcie_setup(&bridge->windows, pcie); pci_add_flags(PCI_REASSIGN_ALL_RSRC | PCI_REASSIGN_ALL_BUS); + bridge->dev.parent = dev; + bridge->sysdata = pcie; + bridge->busnr = pcie->root_bus_nr; + bridge->ops = &rcar_pcie_ops; if (IS_ENABLED(CONFIG_PCI_MSI)) - bus = pci_scan_root_bus_msi(dev, pcie->root_bus_nr, - &rcar_pcie_ops, pcie, &res, &pcie->msi.chip); - else - bus = pci_scan_root_bus(dev, pcie->root_bus_nr, - &rcar_pcie_ops, pcie, &res); + bridge->msi = &pcie->msi.chip; - if (!bus) { - dev_err(dev, "Scanning rootbus failed"); - return -ENODEV; + ret = pci_scan_root_bus_bridge(bridge); + if (ret < 0) { + kfree(bridge); + return ret; } + bus = bridge->bus; + pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci); pci_bus_size_bridges(bus); @@ -1127,11 +1131,14 @@ static int rcar_pcie_probe(struct platform_device *pdev) unsigned int data; int err; int (*hw_init_fn)(struct rcar_pcie *); + struct pci_host_bridge *bridge; - pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL); - if (!pcie) + bridge = pci_alloc_host_bridge(sizeof(*pcie)); + if (!bridge) return -ENOMEM; + pcie = pci_host_bridge_priv(bridge); + pcie->dev = dev; INIT_LIST_HEAD(&pcie->resources); @@ -1141,12 +1148,12 @@ static int rcar_pcie_probe(struct platform_device *pdev) err = rcar_pcie_get_resources(pcie); if (err < 0) { dev_err(dev, "failed to request resources: %d\n", err); - return err; + goto err_free_bridge; } err = rcar_pcie_parse_map_dma_ranges(pcie, dev->of_node); if (err) - return err; + goto err_free_bridge; pm_runtime_enable(dev); err = pm_runtime_get_sync(dev); @@ -1183,6 +1190,9 @@ static int rcar_pcie_probe(struct platform_device *pdev) return 0; +err_free_bridge: + pci_free_host_bridge(bridge); + err_pm_put: pm_runtime_put(dev);