From patchwork Wed Jan 21 00:30:13 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yijing Wang X-Patchwork-Id: 5673601 Return-Path: X-Original-To: patchwork-linux-arm@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 8A6A49F358 for ; Wed, 21 Jan 2015 02:37:00 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 6F5EA202C8 for ; Wed, 21 Jan 2015 02:36:59 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 642372021F for ; Wed, 21 Jan 2015 02:36:58 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1YDl7y-0001zu-C5; Wed, 21 Jan 2015 02:34:42 +0000 Received: from szxga02-in.huawei.com ([119.145.14.65]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YDl7r-0001u5-6b for linux-arm-kernel@lists.infradead.org; Wed, 21 Jan 2015 02:34:39 +0000 Received: from 172.24.2.119 (EHLO szxeml433-hub.china.huawei.com) ([172.24.2.119]) by szxrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id CFZ97817; Wed, 21 Jan 2015 10:32:36 +0800 (CST) Received: from localhost.localdomain (10.175.100.166) by szxeml433-hub.china.huawei.com (10.82.67.210) with Microsoft SMTP Server id 14.3.158.1; Wed, 21 Jan 2015 10:32:27 +0800 From: Yijing Wang To: Bjorn Helgaas Subject: [PATCH v2 18/30] PCI/powerpc: Use pci_scan_root_bridge() for simplicity Date: Wed, 21 Jan 2015 08:30:13 +0800 Message-ID: <1421800225-26230-19-git-send-email-wangyijing@huawei.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1421800225-26230-1-git-send-email-wangyijing@huawei.com> References: <1421800225-26230-1-git-send-email-wangyijing@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.100.166] X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150120_183435_835727_FFECB960 X-CRM114-Status: GOOD ( 17.56 ) X-Spam-Score: -0.7 (/) Cc: linux-ia64@vger.kernel.org, linux-pci@vger.kernel.org, Yijing Wang , Guan Xuetao , Russell King , x86@kernel.org, Geert Uytterhoeven , Benjamin Herrenschmidt , Arnd Bergmann , Marc Zyngier , Rusty Russell , linux-m68k@lists.linux-m68k.org, Thomas Gleixner , Yinghai Lu , linux-arm-kernel@lists.infradead.org, Liviu Dudau , Tony Luck , linux-kernel@vger.kernel.org, Jiang Liu , linux-alpha@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, "David S. Miller" X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_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 Now we could use pci_scan_root_bridge() to scan pci buses, provide powerpc specific pci_host_bridge_ops. Suggested-by: Arnd Bergmann Signed-off-by: Yijing Wang CC: Benjamin Herrenschmidt CC: linuxppc-dev@lists.ozlabs.org --- arch/powerpc/include/asm/machdep.h | 2 +- arch/powerpc/kernel/pci-common.c | 63 +++++++++++++++++------------- arch/powerpc/platforms/pseries/pci.c | 8 ++-- arch/powerpc/platforms/pseries/pseries.h | 2 +- 4 files changed, 42 insertions(+), 33 deletions(-) diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h index 8e7f2a8..b811d12 100644 --- a/arch/powerpc/include/asm/machdep.h +++ b/arch/powerpc/include/asm/machdep.h @@ -129,7 +129,7 @@ struct machdep_calls { void (*pcibios_fixup)(void); int (*pci_probe_mode)(struct pci_bus *); void (*pci_irq_fixup)(struct pci_dev *dev); - int (*pcibios_set_root_bus_speed)(struct pci_host_bridge + void (*pcibios_set_root_bus_speed)(struct pci_host_bridge *bridge); /* To setup PHBs when using automatic OF platform driver for PCI */ diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c index c11bfed..1f44df9 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -767,14 +767,33 @@ int pci_proc_domain(struct pci_bus *bus) return 1; } -int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge) +static void pci_host_bridge_set_root_bus_speed( + struct pci_host_bridge *bridge) { if (ppc_md.pcibios_set_root_bus_speed) - return ppc_md.pcibios_set_root_bus_speed(bridge); - - return 0; + ppc_md.pcibios_set_root_bus_speed(bridge); } +static void pci_host_bridge_of_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); + } +} /* This header fixup will do the resource fixup for all devices as they are * probed, but not for bridge ranges */ @@ -1577,6 +1596,11 @@ struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus) return of_node_get(hose->dn); } +static struct pci_host_bridge_ops phb_ops = { + .phb_set_root_bus_speed = pci_host_bridge_set_root_bus_speed, + .phb_of_scan_bus = pci_host_bridge_of_scan_bus, +}; + /** * pci_scan_phb - Given a pci_controller, setup and scan the PCI bus * @hose: Pointer to the PCI host controller instance structure @@ -1584,9 +1608,8 @@ 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)); @@ -1602,30 +1625,16 @@ void pcibios_scan_phb(struct pci_controller *hose) pci_add_resource(&resources, &hose->busn); /* Create an empty bus for the toplevel */ - bus = pci_create_root_bus(hose->parent, + host = pci_scan_root_bridge(hose->parent, PCI_DOMBUS(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->ops, hose, &resources, &phb_ops); + if (host == NULL) { + pr_err("Failed to create host bridge for PCI domain %04x\n", hose->global_number); 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 @@ -1634,9 +1643,9 @@ 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); } } diff --git a/arch/powerpc/platforms/pseries/pci.c b/arch/powerpc/platforms/pseries/pci.c index af685d6..89ff79c 100644 --- a/arch/powerpc/platforms/pseries/pci.c +++ b/arch/powerpc/platforms/pseries/pci.c @@ -110,7 +110,7 @@ static void fixup_winbond_82c105(struct pci_dev* dev) DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105, fixup_winbond_82c105); -int pseries_set_root_bus_speed(struct pci_host_bridge *bridge) +void pseries_set_root_bus_speed(struct pci_host_bridge *bridge) { struct device_node *dn, *pdn; struct pci_bus *bus; @@ -121,7 +121,7 @@ int pseries_set_root_bus_speed(struct pci_host_bridge *bridge) dn = pcibios_get_phb_of_node(bus); if (!dn) - return 0; + return; for (pdn = dn; pdn != NULL; pdn = of_get_next_parent(pdn)) { rc = of_property_read_u32_array(pdn, @@ -135,7 +135,7 @@ int pseries_set_root_bus_speed(struct pci_host_bridge *bridge) if (rc) { pr_debug("no ibm,pcie-link-speed-stats property\n"); - return 0; + return; } switch (pcie_link_speed_stats[0]) { @@ -168,5 +168,5 @@ int pseries_set_root_bus_speed(struct pci_host_bridge *bridge) break; } - return 0; + return; } diff --git a/arch/powerpc/platforms/pseries/pseries.h b/arch/powerpc/platforms/pseries/pseries.h index 5d0be3a..9aa9c13 100644 --- a/arch/powerpc/platforms/pseries/pseries.h +++ b/arch/powerpc/platforms/pseries/pseries.h @@ -63,7 +63,7 @@ extern int dlpar_detach_node(struct device_node *); /* PCI root bridge prepare function override for pseries */ struct pci_host_bridge; -int pseries_set_root_bus_speed(struct pci_host_bridge *bridge); +void pseries_set_root_bus_speed(struct pci_host_bridge *bridge); unsigned long pseries_memory_block_size(void);