From patchwork Sat Apr 27 09:12:25 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yijing Wang X-Patchwork-Id: 2496881 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id 357BF3FC64 for ; Sat, 27 Apr 2013 09:14:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754290Ab3D0JOh (ORCPT ); Sat, 27 Apr 2013 05:14:37 -0400 Received: from szxga01-in.huawei.com ([119.145.14.64]:58297 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754019Ab3D0JOg (ORCPT ); Sat, 27 Apr 2013 05:14:36 -0400 Received: from 172.24.2.119 (EHLO szxeml214-edg.china.huawei.com) ([172.24.2.119]) by szxrg01-dlp.huawei.com (MOS 4.3.4-GA FastPath queued) with ESMTP id BBG66683; Sat, 27 Apr 2013 17:14:31 +0800 (CST) Received: from SZXEML418-HUB.china.huawei.com (10.82.67.157) by szxeml214-edg.china.huawei.com (172.24.2.29) with Microsoft SMTP Server (TLS) id 14.1.323.7; Sat, 27 Apr 2013 17:13:26 +0800 Received: from localhost (10.135.76.69) by szxeml418-hub.china.huawei.com (10.82.67.157) with Microsoft SMTP Server id 14.1.323.7; Sat, 27 Apr 2013 17:13:16 +0800 From: Yijing Wang To: Bjorn Helgaas CC: , Hanjun Guo , , Yijing Wang , Tony Luck , Fenghua Yu , Yinghai Lu , Greg Kroah-Hartman , Thierry Reding , Subject: [PATCH 3/7] PCI/IA64: make pci_root_info holds pci hostbridge resources Date: Sat, 27 Apr 2013 17:12:25 +0800 Message-ID: <1367053949-38424-4-git-send-email-wangyijing@huawei.com> X-Mailer: git-send-email 1.7.11.msysgit.1 In-Reply-To: <1367053949-38424-1-git-send-email-wangyijing@huawei.com> References: <1367053949-38424-1-git-send-email-wangyijing@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.135.76.69] X-CFilter-Loop: Reflected Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Currently, pcibios_resource_to_bus() and pcibios_bus_to_resource() functions use pci_host_bridge to translate bus side address from/to cpu side address. The pci_window in pci_controller never be used again. So we remove pci_window in pci_controller and make pci_root_info hold the pci hostbridge resources like in x86. Signed-off-by: Yijing Wang Signed-off-by: Jiang Liu Cc: Tony Luck Cc: Fenghua Yu Cc: Yinghai Lu Cc: Greg Kroah-Hartman Cc: Thierry Reding Cc: linux-ia64@vger.kernel.org --- arch/ia64/include/asm/pci.h | 18 ++++++----- arch/ia64/pci/pci.c | 68 ++++++++++++++++++++-------------------- arch/ia64/sn/kernel/io_init.c | 67 ++++++++++++++++++++++++--------------- 3 files changed, 85 insertions(+), 68 deletions(-) diff --git a/arch/ia64/include/asm/pci.h b/arch/ia64/include/asm/pci.h index 5e04b59..82a236c 100644 --- a/arch/ia64/include/asm/pci.h +++ b/arch/ia64/include/asm/pci.h @@ -89,23 +89,25 @@ extern int pci_mmap_legacy_page_range(struct pci_bus *bus, #define pci_legacy_read platform_pci_legacy_read #define pci_legacy_write platform_pci_legacy_write -struct pci_window { - struct resource resource; - u64 offset; -}; - struct pci_controller { void *acpi_handle; void *iommu; int segment; int node; /* nearest node with memory or -1 for global allocation */ - unsigned int windows; - struct pci_window *window; - void *platform_data; }; +struct pci_root_info { + struct acpi_device *bridge; + struct pci_controller *controller; + struct list_head resources; + struct resource *res; + resource_size_t *res_offset; + unsigned int res_num; + char *name; +}; + #define PCI_CONTROLLER(busdev) ((struct pci_controller *) busdev->sysdata) #define pci_domain_nr(busdev) (PCI_CONTROLLER(busdev)->segment) diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c index de1474f..d7681c6 100644 --- a/arch/ia64/pci/pci.c +++ b/arch/ia64/pci/pci.c @@ -130,12 +130,6 @@ static struct pci_controller *alloc_pci_controller(int seg) return controller; } -struct pci_root_info { - struct acpi_device *bridge; - struct pci_controller *controller; - struct list_head resources; - char *name; -}; static unsigned int new_space (u64 phys_base, int sparse) @@ -265,7 +259,7 @@ static acpi_status count_window(struct acpi_resource *resource, void *data) static acpi_status add_window(struct acpi_resource *res, void *data) { struct pci_root_info *info = data; - struct pci_window *window; + struct resource *resource; struct acpi_resource_address64 addr; acpi_status status; unsigned long flags, offset = 0; @@ -289,37 +283,36 @@ static acpi_status add_window(struct acpi_resource *res, void *data) } else return AE_OK; - window = &info->controller->window[info->controller->windows++]; - window->resource.name = info->name; - window->resource.flags = flags; - window->resource.start = addr.minimum + offset; - window->resource.end = window->resource.start + addr.address_length - 1; - window->offset = offset; + resource = &info->res[info->res_num]; + resource->name = info->name; + resource->flags = flags; + resource->start = addr.minimum + offset; + resource->end = resource->start + addr.address_length - 1; + info->res_offset[info->res_num] = offset; - if (insert_resource(root, &window->resource)) { + if (insert_resource(root, resource)) { dev_err(&info->bridge->dev, "can't allocate host bridge window %pR\n", - &window->resource); + resource); } else { if (offset) dev_info(&info->bridge->dev, "host bridge window %pR " "(PCI address [%#llx-%#llx])\n", - &window->resource, - window->resource.start - offset, - window->resource.end - offset); + resource, + resource->start - offset, + resource->end - offset); else dev_info(&info->bridge->dev, - "host bridge window %pR\n", - &window->resource); + "host bridge window %pR\n", resource); } - /* HP's firmware has a hack to work around a Windows bug. * Ignore these tiny memory ranges */ - if (!((window->resource.flags & IORESOURCE_MEM) && - (window->resource.end - window->resource.start < 16))) - pci_add_resource_offset(&info->resources, &window->resource, - window->offset); + if (!((resource->flags & IORESOURCE_MEM) && + (resource->end - resource->start < 16))) + pci_add_resource_offset(&info->resources, resource, + info->res_offset[info->res_num]); + info->res_num++; return AE_OK; } @@ -329,7 +322,6 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root) int domain = root->segment; int bus = root->secondary.start; struct pci_controller *controller; - unsigned int windows = 0; struct pci_root_info info; struct pci_bus *pbus; char *name; @@ -351,22 +343,29 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root) /* insert busn resource at first */ pci_add_resource(&info.resources, &root->secondary); acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_window, - &windows); - if (windows) { - controller->window = - kzalloc_node(sizeof(*controller->window) * windows, + &info.res_num); + if (info.res_num) { + info.res = + kzalloc_node(sizeof(*info.res) * info.res_num, GFP_KERNEL, controller->node); - if (!controller->window) + if (!info.res) goto out2; + + info.res_offset = + kzalloc_node(sizeof(*info.res_offset) * info.res_num, + GFP_KERNEL, controller->node); + if (!info.res_offset) + goto out3; name = kmalloc(16, GFP_KERNEL); if (!name) - goto out3; + goto out4; sprintf(name, "PCI Bus %04x:%02x", domain, bus); info.bridge = device; info.controller = controller; info.name = name; + info.res_num = 0; acpi_walk_resources(device->handle, METHOD_NAME__CRS, add_window, &info); } @@ -385,9 +384,10 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root) pci_scan_child_bus(pbus); return pbus; - +out4: + kfree(info.res_offset); out3: - kfree(controller->window); + kfree(info.res); out2: kfree(controller); out1: diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c index 99710f5..86c2335 100644 --- a/arch/ia64/sn/kernel/io_init.c +++ b/arch/ia64/sn/kernel/io_init.c @@ -125,27 +125,39 @@ static void __init sn_fixup_ionodes(void) * and their resources (_CRS), */ static void -sn_legacy_pci_window_fixup(struct pci_controller *controller, +sn_legacy_pci_window_fixup(struct pci_root_info *info, u64 legacy_io, u64 legacy_mem) { - controller->window = kcalloc(2, sizeof(struct pci_window), - GFP_KERNEL); - BUG_ON(controller->window == NULL); - controller->window[0].offset = legacy_io; - controller->window[0].resource.name = "legacy_io"; - controller->window[0].resource.flags = IORESOURCE_IO; - controller->window[0].resource.start = legacy_io; - controller->window[0].resource.end = - controller->window[0].resource.start + 0xffff; - controller->window[0].resource.parent = &ioport_resource; - controller->window[1].offset = legacy_mem; - controller->window[1].resource.name = "legacy_mem"; - controller->window[1].resource.flags = IORESOURCE_MEM; - controller->window[1].resource.start = legacy_mem; - controller->window[1].resource.end = - controller->window[1].resource.start + (1024 * 1024) - 1; - controller->window[1].resource.parent = &iomem_resource; - controller->windows = 2; + info->res_num = 2; + info->res = kzalloc(sizeof(*info->res) * info->res_num, GFP_KERNEL); + if (!info->res) { + info->res_num = 0; + return; + } + + info->res_offset = kzalloc(sizeof(*info->res_offset) * info->res_num, + GFP_KERNEL); + if (!info->res_offset) { + kfree(info->res); + info->res = NULL; + info->res_num = 0; + return; + } + + info->res_offset[0] = legacy_io; + info->res[0].name = "legacy_io"; + info->res[0].flags = IORESOURCE_IO; + info->res[0].start = legacy_io; + info->res[0].end = + info->res[0].start + 0xffff; + info->res[0].parent = &ioport_resource; + info->res_offset[1] = legacy_mem; + info->res[1].name = "legacy_mem"; + info->res[1].flags = IORESOURCE_MEM; + info->res[1].start = legacy_mem; + info->res[1].end = + info->res[1].start + (1024 * 1024) - 1; + info->res[1].parent = &iomem_resource; } /* @@ -248,6 +260,7 @@ static void __init sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus) { s64 status = 0; + struct pci_root_info info; struct pci_controller *controller; struct pcibus_bussoft *prom_bussoft_ptr; LIST_HEAD(resources); @@ -262,20 +275,21 @@ sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus) controller = kzalloc(sizeof(*controller), GFP_KERNEL); BUG_ON(!controller); controller->segment = segment; - - /* + /* * Temporarily save the prom_bussoft_ptr for use by sn_bus_fixup(). * (platform_data will be overwritten later in sn_common_bus_fixup()) */ controller->platform_data = prom_bussoft_ptr; + + info.controller = controller; - sn_legacy_pci_window_fixup(controller, + sn_legacy_pci_window_fixup(&info, prom_bussoft_ptr->bs_legacy_io, prom_bussoft_ptr->bs_legacy_mem); - for (i = 0; i < controller->windows; i++) + for (i = 0; i < info.res_num; i++) pci_add_resource_offset(&resources, - &controller->window[i].resource, - controller->window[i].offset); + &info.res[i], + info.res_offset[i]); bus = pci_scan_root_bus(NULL, busnum, &pci_root_ops, controller, &resources); if (bus == NULL) @@ -286,8 +300,9 @@ sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus) return; error_return: - kfree(controller); + kfree(info.res); + kfree(info.res_offset); return; }