From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from szxga02-in.huawei.com ([119.145.14.65]:42816 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751678Ab2FSNXN (ORCPT ); Tue, 19 Jun 2012 09:23:13 -0400 From: Jiang Liu To: Bjorn Helgaas , Yinghai Lu , Taku Izumi , Kenji Kaneshige , Don Dutile CC: Jiang Liu , Yijing Wang , Keping Chen , , Jiang Liu Subject: [PATCH v8 04/12] x86/PCI: introduce pci_mmcfg_arch_map()/pci_mmcfg_arch_unmap() Date: Tue, 19 Jun 2012 21:15:24 +0800 Message-ID: <1340111732-6276-5-git-send-email-jiang.liu@huawei.com> In-Reply-To: <1340111732-6276-1-git-send-email-jiang.liu@huawei.com> References: <1340111732-6276-1-git-send-email-jiang.liu@huawei.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-pci-owner@vger.kernel.org List-ID: Introduce pci_mmcfg_arch_map()/pci_mmcfg_arch_unmap(), which will be used when supporting PCI root bridge hotplug. Signed-off-by: Jiang Liu Signed-off-by: Bjorn Helgaas --- arch/x86/include/asm/pci_x86.h | 2 ++ arch/x86/pci/mmconfig_32.c | 15 +++++++++++++++ arch/x86/pci/mmconfig_64.c | 22 +++++++++++++++++++++- 3 files changed, 38 insertions(+), 1 deletions(-) diff --git a/arch/x86/include/asm/pci_x86.h b/arch/x86/include/asm/pci_x86.h index b3a5317..df898ce 100644 --- a/arch/x86/include/asm/pci_x86.h +++ b/arch/x86/include/asm/pci_x86.h @@ -135,6 +135,8 @@ struct pci_mmcfg_region { extern int __init pci_mmcfg_arch_init(void); extern void __init pci_mmcfg_arch_free(void); +extern int __devinit pci_mmcfg_arch_map(struct pci_mmcfg_region *cfg); +extern void pci_mmcfg_arch_unmap(struct pci_mmcfg_region *cfg); extern struct pci_mmcfg_region *pci_mmconfig_lookup(int segment, int bus); extern struct list_head pci_mmcfg_list; diff --git a/arch/x86/pci/mmconfig_32.c b/arch/x86/pci/mmconfig_32.c index 5dad04a..a22785d 100644 --- a/arch/x86/pci/mmconfig_32.c +++ b/arch/x86/pci/mmconfig_32.c @@ -141,3 +141,18 @@ int __init pci_mmcfg_arch_init(void) void __init pci_mmcfg_arch_free(void) { } + +int __devinit pci_mmcfg_arch_map(struct pci_mmcfg_region *cfg) +{ + return 0; +} + +void pci_mmcfg_arch_unmap(struct pci_mmcfg_region *cfg) +{ + unsigned long flags; + + /* Invalidate the cached mmcfg map entry. */ + raw_spin_lock_irqsave(&pci_config_lock, flags); + mmcfg_last_accessed_device = 0; + raw_spin_unlock_irqrestore(&pci_config_lock, flags); +} diff --git a/arch/x86/pci/mmconfig_64.c b/arch/x86/pci/mmconfig_64.c index acc48c5..4e05779 100644 --- a/arch/x86/pci/mmconfig_64.c +++ b/arch/x86/pci/mmconfig_64.c @@ -95,7 +95,7 @@ static const struct pci_raw_ops pci_mmcfg = { .write = pci_mmcfg_write, }; -static void __iomem * __init mcfg_ioremap(struct pci_mmcfg_region *cfg) +static void __iomem * __devinit mcfg_ioremap(struct pci_mmcfg_region *cfg) { void __iomem *addr; u64 start, size; @@ -138,3 +138,23 @@ void __init pci_mmcfg_arch_free(void) } } } + +int __devinit pci_mmcfg_arch_map(struct pci_mmcfg_region *cfg) +{ + cfg->virt = mcfg_ioremap(cfg); + if (!cfg->virt) { + printk(KERN_ERR PREFIX "can't map MMCONFIG at %pR\n", + &cfg->res); + return -ENOMEM; + } + + return 0; +} + +void pci_mmcfg_arch_unmap(struct pci_mmcfg_region *cfg) +{ + if (cfg && cfg->virt) { + iounmap(cfg->virt + PCI_MMCFG_BUS_OFFSET(cfg->start_bus)); + cfg->virt = NULL; + } +} -- 1.7.1