From patchwork Fri Apr 3 09:25:53 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yijing Wang X-Patchwork-Id: 6154731 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 [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 8D2699F398 for ; Fri, 3 Apr 2015 09:29:38 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id F076C203EC for ; Fri, 3 Apr 2015 09:29:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B4015203E3 for ; Fri, 3 Apr 2015 09:29:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752864AbbDCJ32 (ORCPT ); Fri, 3 Apr 2015 05:29:28 -0400 Received: from szxga01-in.huawei.com ([58.251.152.64]:55222 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752560AbbDCJ3K (ORCPT ); Fri, 3 Apr 2015 05:29:10 -0400 Received: from 172.24.2.119 (EHLO szxeml430-hub.china.huawei.com) ([172.24.2.119]) by szxrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id CLR08856; Fri, 03 Apr 2015 17:29:03 +0800 (CST) Received: from localhost.localdomain (10.175.100.166) by szxeml430-hub.china.huawei.com (10.82.67.185) with Microsoft SMTP Server id 14.3.158.1; Fri, 3 Apr 2015 17:28:51 +0800 From: Yijing Wang To: Bjorn Helgaas CC: Jiang Liu , , Yinghai Lu , , Marc Zyngier , , Russell King , , , Thomas Gleixner , Benjamin Herrenschmidt , Rusty Russell , Tony Luck , , "David S. Miller" , "Guan Xuetao" , , , Liviu Dudau , "Arnd Bergmann" , Geert Uytterhoeven , "Yijing Wang" , Subject: [PATCH v9 19/30] powerpc/pci: Use pci_scan_host_bridge() for simplicity Date: Fri, 3 Apr 2015 17:25:53 +0800 Message-ID: <1428053164-28277-21-git-send-email-wangyijing@huawei.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1428053164-28277-1-git-send-email-wangyijing@huawei.com> References: <1428053164-28277-1-git-send-email-wangyijing@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.100.166] X-CFilter-Loop: Reflected Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham 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 Now we could use pci_scan_host_bridge() to scan pci buses, provide powerpc specific pci_host_bridge_ops. Signed-off-by: Yijing Wang CC: Benjamin Herrenschmidt CC: linuxppc-dev@lists.ozlabs.org Tested-by: Daniel Axtens Reviewed-by: Daniel Axtens --- arch/powerpc/kernel/pci-common.c | 62 +++++++++++++++++++++++-------------- 1 files changed, 38 insertions(+), 24 deletions(-) diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c index 2c58200..50b32f6 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -773,6 +773,29 @@ void pcibios_set_root_bus_speed(struct pci_host_bridge *bridge) return ppc_md.pcibios_set_root_bus_speed(bridge); } +static int pci_host_scan_bus(struct pci_host_bridge *host) +{ + int mode = PCI_PROBE_NORMAL; + struct pci_bus *bus = host->bus; + struct pci_controller *hose = dev_get_drvdata(&host->dev); + + /* Get probe mode and perform scan */ + if (hose->dn && ppc_md.pci_probe_mode) + mode = ppc_md.pci_probe_mode(bus); + + pr_debug(" probe mode: %d\n", mode); + if (mode == PCI_PROBE_DEVTREE) + of_scan_bus(hose->dn, bus); + + if (mode == PCI_PROBE_NORMAL) { + pci_bus_update_busn_res_end(bus, 255); + hose->last_busno = pci_scan_child_bus(bus); + pci_bus_update_busn_res_end(bus, hose->last_busno); + } + + return pci_bus_child_max_busnr(bus); +} + /* This header fixup will do the resource fixup for all devices as they are * probed, but not for bridge ranges */ @@ -1585,6 +1608,11 @@ struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus) return of_node_get(hose->dn); } +static struct pci_host_bridge_ops pci_host_ops = { + .set_root_bus_speed = pcibios_set_root_bus_speed, + .scan_bus = pci_host_scan_bus, +}; + /** * pci_scan_phb - Given a pci_controller, setup and scan the PCI bus * @hose: Pointer to the PCI host controller instance structure @@ -1592,9 +1620,8 @@ struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus) void pcibios_scan_phb(struct pci_controller *hose) { LIST_HEAD(resources); - struct pci_bus *bus; + struct pci_host_bridge *host; struct device_node *node = hose->dn; - int mode; pr_debug("PCI: Scanning PHB %s\n", of_node_full_name(node)); @@ -1609,30 +1636,17 @@ void pcibios_scan_phb(struct pci_controller *hose) hose->busn.flags = IORESOURCE_BUS; pci_add_resource(&resources, &hose->busn); + pci_host_ops.pci_ops = hose->ops; /* Create an empty bus for the toplevel */ - bus = pci_create_root_bus(hose->parent, hose->global_number, - hose->first_busno, hose->ops, hose, &resources); - if (bus == NULL) { - pr_err("Failed to create bus for PCI domain %04x\n", - hose->global_number); + host = pci_scan_host_bridge(hose->parent, hose->global_number, + hose->first_busno, hose, &resources, &pci_host_ops); + if (host == NULL) { + pr_err("Failed to create host bridge for pci%04x:%02x\n", + hose->global_number, hose->first_busno); pci_free_resource_list(&resources); return; } - hose->bus = bus; - - /* Get probe mode and perform scan */ - mode = PCI_PROBE_NORMAL; - if (node && ppc_md.pci_probe_mode) - mode = ppc_md.pci_probe_mode(bus); - pr_debug(" probe mode: %d\n", mode); - if (mode == PCI_PROBE_DEVTREE) - of_scan_bus(node, bus); - - if (mode == PCI_PROBE_NORMAL) { - pci_bus_update_busn_res_end(bus, 255); - hose->last_busno = pci_scan_child_bus(bus); - pci_bus_update_busn_res_end(bus, hose->last_busno); - } + hose->bus = host->bus; /* Platform gets a chance to do some global fixups before * we proceed to resource allocation @@ -1641,9 +1655,9 @@ void pcibios_scan_phb(struct pci_controller *hose) ppc_md.pcibios_fixup_phb(hose); /* Configure PCI Express settings */ - if (bus && !pci_has_flag(PCI_PROBE_ONLY)) { + if (host->bus && !pci_has_flag(PCI_PROBE_ONLY)) { struct pci_bus *child; - list_for_each_entry(child, &bus->children, node) + list_for_each_entry(child, &host->bus->children, node) pcie_bus_configure_settings(child); } }