From patchwork Thu Jun 8 14:13:15 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Pieralisi X-Patchwork-Id: 9775511 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 3151260350 for ; Thu, 8 Jun 2017 14:13:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1CDE320855 for ; Thu, 8 Jun 2017 14:13:48 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 10CAB2855A; Thu, 8 Jun 2017 14:13:48 +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 E9F0D20855 for ; Thu, 8 Jun 2017 14:13:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751524AbdFHONq (ORCPT ); Thu, 8 Jun 2017 10:13:46 -0400 Received: from foss.arm.com ([217.140.101.70]:50466 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751450AbdFHONp (ORCPT ); Thu, 8 Jun 2017 10:13:45 -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 583241684; Thu, 8 Jun 2017 07:13:45 -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 66D733F3E1; Thu, 8 Jun 2017 07:13:40 -0700 (PDT) From: Lorenzo Pieralisi To: linux-pci@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, Lorenzo Pieralisi , Scott Branden , Bjorn Helgaas , Ray Jui , Jon Mason , Arnd Bergmann , Will Deacon , Russell King , Pratyush Anand , Jingoo Han , Rob Herring , Simon Horman , 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 15/42] PCI: iproc: Convert PCI scan API to pci_scan_root_bus_bridge() Date: Thu, 8 Jun 2017 15:13:15 +0100 Message-Id: <20170608141342.2018-16-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 iproc host code to pci_scan_root_bus_bridge() to improve the PCI root bus scanning interface. Signed-off-by: Lorenzo Pieralisi Cc: Scott Branden Cc: Bjorn Helgaas Cc: Ray Jui Cc: Jon Mason --- drivers/pci/host/pcie-iproc-bcma.c | 7 +++++-- drivers/pci/host/pcie-iproc-platform.c | 7 +++++-- drivers/pci/host/pcie-iproc.c | 38 ++++++++++++++++++---------------- 3 files changed, 30 insertions(+), 22 deletions(-) diff --git a/drivers/pci/host/pcie-iproc-bcma.c b/drivers/pci/host/pcie-iproc-bcma.c index 384c27e..f03d5e3 100644 --- a/drivers/pci/host/pcie-iproc-bcma.c +++ b/drivers/pci/host/pcie-iproc-bcma.c @@ -45,12 +45,15 @@ static int iproc_pcie_bcma_probe(struct bcma_device *bdev) struct device *dev = &bdev->dev; struct iproc_pcie *pcie; LIST_HEAD(resources); + struct pci_host_bridge *bridge; int ret; - pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL); - if (!pcie) + bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie)); + if (!bridge) return -ENOMEM; + pcie = pci_host_bridge_priv(bridge); + pcie->dev = dev; pcie->type = IPROC_PCIE_PAXB_BCMA; diff --git a/drivers/pci/host/pcie-iproc-platform.c b/drivers/pci/host/pcie-iproc-platform.c index 90d2bdd..2253119 100644 --- a/drivers/pci/host/pcie-iproc-platform.c +++ b/drivers/pci/host/pcie-iproc-platform.c @@ -52,12 +52,15 @@ static int iproc_pcie_pltfm_probe(struct platform_device *pdev) struct resource reg; resource_size_t iobase = 0; LIST_HEAD(resources); + struct pci_host_bridge *bridge; int ret; - pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL); - if (!pcie) + bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie)); + if (!bridge) return -ENOMEM; + pcie = pci_host_bridge_priv(bridge); + pcie->dev = dev; pcie->type = (enum iproc_pcie_type) of_device_get_match_data(dev); diff --git a/drivers/pci/host/pcie-iproc.c b/drivers/pci/host/pcie-iproc.c index e48b8e2..55a3665 100644 --- a/drivers/pci/host/pcie-iproc.c +++ b/drivers/pci/host/pcie-iproc.c @@ -1259,7 +1259,8 @@ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res) struct device *dev; int ret; void *sysdata; - struct pci_bus *bus, *child; + struct pci_bus *child; + struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie); dev = pcie->dev; @@ -1306,18 +1307,10 @@ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res) sysdata = pcie; #endif - bus = pci_create_root_bus(dev, 0, &iproc_pcie_ops, sysdata, res); - if (!bus) { - dev_err(dev, "unable to create PCI root bus\n"); - ret = -ENOMEM; - goto err_power_off_phy; - } - pcie->root_bus = bus; - ret = iproc_pcie_check_link(pcie); if (ret) { dev_err(dev, "no PCIe EP device detected\n"); - goto err_rm_root_bus; + goto err_power_off_phy; } iproc_pcie_enable(pcie); @@ -1326,23 +1319,32 @@ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res) if (iproc_pcie_msi_enable(pcie)) dev_info(dev, "not using iProc MSI\n"); - pci_scan_child_bus(bus); - pci_assign_unassigned_bus_resources(bus); + list_splice_init(res, &host->windows); + host->busnr = 0; + host->dev.parent = dev; + host->ops = &iproc_pcie_ops; + host->sysdata = sysdata; + + ret = pci_scan_root_bus_bridge(host); + if (ret < 0) { + dev_err(dev, "failed to scan host: %d\n", ret); + goto err_power_off_phy; + } if (pcie->map_irq) pci_fixup_irqs(pci_common_swizzle, pcie->map_irq); - list_for_each_entry(child, &bus->children, node) + pci_assign_unassigned_bus_resources(host->bus); + + pcie->root_bus = host->bus; + + list_for_each_entry(child, &host->bus->children, node) pcie_bus_configure_settings(child); - pci_bus_add_devices(bus); + pci_bus_add_devices(host->bus); return 0; -err_rm_root_bus: - pci_stop_root_bus(bus); - pci_remove_root_bus(bus); - err_power_off_phy: phy_power_off(pcie->phy); err_exit_phy: