From patchwork Mon Mar 9 02:34:03 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yijing Wang X-Patchwork-Id: 5964161 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 594249F373 for ; Mon, 9 Mar 2015 02:54:08 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 42AF22027D for ; Mon, 9 Mar 2015 02:54:07 +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 D694920254 for ; Mon, 9 Mar 2015 02:54:05 +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 1YUnmZ-0008N6-Hb; Mon, 09 Mar 2015 02:51:03 +0000 Received: from szxga01-in.huawei.com ([58.251.152.64]) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1YUnjQ-0004cs-IZ for linux-arm-kernel@lists.infradead.org; Mon, 09 Mar 2015 02:47:51 +0000 Received: from 172.24.2.119 (EHLO szxeml433-hub.china.huawei.com) ([172.24.2.119]) by szxrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id CKL80098; Mon, 09 Mar 2015 10:43:00 +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; Mon, 9 Mar 2015 10:42:31 +0800 From: Yijing Wang To: Bjorn Helgaas Subject: [PATCH v6 06/30] PCI: Combine PCI domain and bus number in u32 arg Date: Mon, 9 Mar 2015 10:34:03 +0800 Message-ID: <1425868467-9667-7-git-send-email-wangyijing@huawei.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1425868467-9667-1-git-send-email-wangyijing@huawei.com> References: <1425868467-9667-1-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-20150308_194749_216126_B7BBFC6B X-CRM114-Status: GOOD ( 13.20 ) X-Spam-Score: -0.0 (/) 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, Bjorn Helgaas , 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, "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 Currently, we use int type for bus number in pci_create_root_bus(), pci_scan_root_bus() and pci_scan_bus_legacy. Because PCI bus number always <= 255, so we could change the bus number argument type to u32, and combine PCI domain and bus number in one. Also add a domain member in pci_host_bridge to save domain number. Finally, we could eliminate lots of the platform specific pci_domain_nr() in the last of the series. Signed-off-by: Yijing Wang Signed-off-by: Bjorn Helgaas --- drivers/pci/probe.c | 16 +++++++++------- include/linux/pci.h | 7 ++++--- include/uapi/linux/pci.h | 3 +++ 3 files changed, 16 insertions(+), 10 deletions(-) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 187fa54..3d6befd 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1890,7 +1890,7 @@ void __weak pcibios_remove_bus(struct pci_bus *bus) { } -struct pci_bus *pci_create_root_bus(struct device *parent, int bus, +struct pci_bus *pci_create_root_bus(struct device *parent, u32 db, struct pci_ops *ops, void *sysdata, struct list_head *resources) { int error; @@ -1901,6 +1901,7 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus, resource_size_t offset; char bus_addr[64]; char *fmt; + u8 bus = PCI_BUSNUM(db); b = pci_alloc_bus(NULL); if (!b) @@ -1921,6 +1922,7 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus, if (!bridge) goto err_out; + bridge->domain = PCI_DOMAIN(db); bridge->dev.parent = parent; bridge->dev.release = pci_release_host_bridge_dev; dev_set_name(&bridge->dev, "pci%04x:%02x", pci_domain_nr(b), bus); @@ -2058,7 +2060,7 @@ void pci_bus_release_busn_res(struct pci_bus *b) res, ret ? "can not be" : "is"); } -struct pci_bus *pci_scan_root_bus(struct device *parent, int bus, +struct pci_bus *pci_scan_root_bus(struct device *parent, u32 db, struct pci_ops *ops, void *sysdata, struct list_head *resources) { struct resource_entry *window; @@ -2072,15 +2074,15 @@ struct pci_bus *pci_scan_root_bus(struct device *parent, int bus, break; } - b = pci_create_root_bus(parent, bus, ops, sysdata, resources); + b = pci_create_root_bus(parent, db, ops, sysdata, resources); if (!b) return NULL; if (!found) { dev_info(&b->dev, "No busn resource found for root bus, will use [bus %02x-ff]\n", - bus); - pci_bus_insert_busn_res(b, bus, 255); + PCI_BUSNUM(db)); + pci_bus_insert_busn_res(b, PCI_BUSNUM(db), 255); } max = pci_scan_child_bus(b); @@ -2092,7 +2094,7 @@ struct pci_bus *pci_scan_root_bus(struct device *parent, int bus, } EXPORT_SYMBOL(pci_scan_root_bus); -struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, +struct pci_bus *pci_scan_bus(u32 db, struct pci_ops *ops, void *sysdata) { LIST_HEAD(resources); @@ -2101,7 +2103,7 @@ struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, pci_add_resource(&resources, &ioport_resource); pci_add_resource(&resources, &iomem_resource); pci_add_resource(&resources, &busn_resource); - b = pci_create_root_bus(NULL, bus, ops, sysdata, &resources); + b = pci_create_root_bus(NULL, db, ops, sysdata, &resources); if (b) { pci_scan_child_bus(b); } else { diff --git a/include/linux/pci.h b/include/linux/pci.h index 36effb8..8b3d245 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -401,6 +401,7 @@ static inline int pci_channel_offline(struct pci_dev *pdev) } struct pci_host_bridge { + u16 domain; struct device dev; struct pci_bus *bus; /* root bus */ struct list_head windows; /* resource_entry */ @@ -769,14 +770,14 @@ void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res, void pcibios_scan_specific_bus(int busn); struct pci_bus *pci_find_bus(int domain, int busnr); void pci_bus_add_devices(const struct pci_bus *bus); -struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata); -struct pci_bus *pci_create_root_bus(struct device *parent, int bus, +struct pci_bus *pci_scan_bus(u32 dombus, struct pci_ops *ops, void *sysdata); +struct pci_bus *pci_create_root_bus(struct device *parent, u32 dombus, struct pci_ops *ops, void *sysdata, struct list_head *resources); int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax); int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax); void pci_bus_release_busn_res(struct pci_bus *b); -struct pci_bus *pci_scan_root_bus(struct device *parent, int bus, +struct pci_bus *pci_scan_root_bus(struct device *parent, u32 dombus, struct pci_ops *ops, void *sysdata, struct list_head *resources); struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, diff --git a/include/uapi/linux/pci.h b/include/uapi/linux/pci.h index 3c292bc..89c6f15 100644 --- a/include/uapi/linux/pci.h +++ b/include/uapi/linux/pci.h @@ -30,6 +30,9 @@ #define PCI_DEVFN(slot, func) ((((slot) & 0x1f) << 3) | ((func) & 0x07)) #define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f) #define PCI_FUNC(devfn) ((devfn) & 0x07) +#define PCI_DOMAIN(db) ((db) >> 16) +#define PCI_BUSNUM(db) ((db) & 0xffff) +#define PCI_DOMBUS(domain, bus) (((domain) << 16) | (bus)) /* Ioctls for /proc/bus/pci/X/Y nodes. */ #define PCIIOC_BASE ('P' << 24 | 'C' << 16 | 'I' << 8)