Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757938Ab0BCXjb (ORCPT ); Wed, 3 Feb 2010 18:39:31 -0500 Received: from g4t0016.houston.hp.com ([15.201.24.19]:7269 "EHLO g4t0016.houston.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932171Ab0BCXjX (ORCPT ); Wed, 3 Feb 2010 18:39:23 -0500 Subject: [PATCH v1 5/7] PCI: replace bus resource table with a list To: Jesse Barnes From: Bjorn Helgaas Cc: Matthew Garrett , Tony Luck , linux-pci@vger.kernel.org, Peter Haight , Gary Hade , linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, Yinghai Lu , Ingo Molnar , Linus Torvalds , Larry Finger Date: Wed, 03 Feb 2010 16:39:21 -0700 Message-ID: <20100203233921.10803.43245.stgit@bob.kio> In-Reply-To: <20100203233617.10803.92102.stgit@bob.kio> References: <20100203233617.10803.92102.stgit@bob.kio> User-Agent: StGit/0.15 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 24066 Lines: 705 Previously we used a table of size PCI_BUS_NUM_RESOURCES for resources forwarded to a bus by its upstream bridge. We've increased this size several times when the table overflowed. But there's no good limit on the number of resources for a bus because host bridges can forward any number of ranges to their secondary buses (i.e., PCI root buses). This patch replaces the fixed-size table with a list. Signed-off-by: Bjorn Helgaas --- arch/ia64/pci/pci.c | 20 +++--- arch/x86/pci/acpi.c | 33 +---------- arch/x86/pci/bus_numa.c | 9 ++- drivers/pci/bus.c | 50 +++++++++++++++- drivers/pci/hotplug/shpchp_sysfs.c | 15 +++-- drivers/pci/pci.c | 6 +- drivers/pci/probe.c | 35 +++++++---- drivers/pci/setup-bus.c | 111 +++++++++++++++++------------------- drivers/pcmcia/rsrc_nonstatic.c | 7 +- drivers/pcmcia/yenta_socket.c | 7 +- include/linux/pci.h | 16 ++++- 11 files changed, 169 insertions(+), 140 deletions(-) diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c index 783c83b..ad64554 100644 --- a/arch/ia64/pci/pci.c +++ b/arch/ia64/pci/pci.c @@ -320,9 +320,9 @@ static __devinit acpi_status add_window(struct acpi_resource *res, void *data) static void __devinit pcibios_setup_root_windows(struct pci_bus *bus, struct pci_controller *ctrl) { - int i, j; + int i; - j = 0; + pci_bus_remove_resources(bus); for (i = 0; i < ctrl->windows; i++) { struct resource *res = &ctrl->window[i].resource; /* HP's firmware has a hack to work around a Windows bug. @@ -330,13 +330,7 @@ pcibios_setup_root_windows(struct pci_bus *bus, struct pci_controller *ctrl) if ((res->flags & IORESOURCE_MEM) && (res->end - res->start < 16)) continue; - if (j >= PCI_BUS_NUM_RESOURCES) { - dev_warn(&bus->dev, - "ignoring host bridge window %pR (no space)\n", - res); - continue; - } - bus->resource[j++] = res; + pci_bus_add_resource(bus, res, 0); } } @@ -451,13 +445,15 @@ EXPORT_SYMBOL(pcibios_bus_to_resource); static int __devinit is_valid_resource(struct pci_dev *dev, int idx) { - unsigned int i, type_mask = IORESOURCE_IO | IORESOURCE_MEM; + unsigned int type_mask = IORESOURCE_IO | IORESOURCE_MEM; struct resource *devr = &dev->resource[idx]; + struct pci_bus_resource *bus_res; if (!dev->bus) return 0; - for (i=0; ibus->resource[i]; + + list_for_each_entry(bus_res, &dev->bus->resources, list) { + struct resource *busr = bus_res->res; if (!busr || ((busr->flags ^ devr->flags) & type_mask)) continue; diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c index 959e548..a2f8cdb 100644 --- a/arch/x86/pci/acpi.c +++ b/arch/x86/pci/acpi.c @@ -45,20 +45,6 @@ count_resource(struct acpi_resource *acpi_res, void *data) return AE_OK; } -static int -bus_has_transparent_bridge(struct pci_bus *bus) -{ - struct pci_dev *dev; - - list_for_each_entry(dev, &bus->devices, bus_list) { - u16 class = dev->class >> 8; - - if (class == PCI_CLASS_BRIDGE_PCI && dev->transparent) - return true; - } - return false; -} - static void align_resource(struct acpi_device *bridge, struct resource *res) { @@ -92,12 +78,8 @@ setup_resource(struct acpi_resource *acpi_res, void *data) acpi_status status; unsigned long flags; struct resource *root; - int max_root_bus_resources = PCI_BUS_NUM_RESOURCES; u64 start, end; - if (bus_has_transparent_bridge(info->bus)) - max_root_bus_resources -= 3; - status = resource_to_addr(acpi_res, &addr); if (!ACPI_SUCCESS(status)) return AE_OK; @@ -115,15 +97,6 @@ setup_resource(struct acpi_resource *acpi_res, void *data) start = addr.minimum + addr.translation_offset; end = start + addr.address_length - 1; - if (info->res_num >= max_root_bus_resources) { - if (pci_probe & PCI_USE__CRS) - printk(KERN_WARNING "PCI: Failed to allocate " - "0x%lx-0x%lx from %s for %s due to _CRS " - "returning more than %d resource descriptors\n", - (unsigned long) start, (unsigned long) end, - root->name, info->name, max_root_bus_resources); - return AE_OK; - } res = &info->res[info->res_num]; res->name = info->name; @@ -143,7 +116,7 @@ setup_resource(struct acpi_resource *acpi_res, void *data) dev_err(&info->bridge->dev, "can't allocate host bridge window %pR\n", res); } else { - info->bus->resource[info->res_num] = res; + pci_bus_add_resource(info->bus, res, 0); info->res_num++; if (addr.translation_offset) dev_info(&info->bridge->dev, "host bridge window %pR " @@ -164,7 +137,9 @@ get_current_resources(struct acpi_device *device, int busnum, struct pci_root_info info; size_t size; - if (!(pci_probe & PCI_USE__CRS)) + if (pci_probe & PCI_USE__CRS) + pci_bus_remove_resources(bus); + else dev_info(&device->dev, "ignoring host bridge windows from ACPI; " "boot with \"pci=use_crs\" to use them\n"); diff --git a/arch/x86/pci/bus_numa.c b/arch/x86/pci/bus_numa.c index f939d60..6999970 100644 --- a/arch/x86/pci/bus_numa.c +++ b/arch/x86/pci/bus_numa.c @@ -12,10 +12,12 @@ void x86_pci_root_bus_res_quirks(struct pci_bus *b) int i; int j; struct pci_root_info *info; + struct pci_bus_resource *bus_res; /* don't go for it if _CRS is used already */ - if (b->resource[0] != &ioport_resource || - b->resource[1] != &iomem_resource) + bus_res = list_first_entry(&b->resources, struct pci_bus_resource, + list); + if (bus_res->res != &ioport_resource) return; if (!pci_root_num) @@ -36,13 +38,14 @@ void x86_pci_root_bus_res_quirks(struct pci_bus *b) printk(KERN_DEBUG "PCI: peer root bus %02x res updated from pci conf\n", b->number); + pci_bus_remove_resources(b); info = &pci_root_info[i]; for (j = 0; j < info->res_num; j++) { struct resource *res; struct resource *root; res = &info->res[j]; - b->resource[j] = res; + pci_bus_add_resource(b, res, 0); if (res->flags & IORESOURCE_IO) root = &ioport_resource; else diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c index a26135b..9725846 100644 --- a/drivers/pci/bus.c +++ b/drivers/pci/bus.c @@ -17,6 +17,49 @@ #include "pci.h" +void pci_bus_add_resource(struct pci_bus *bus, struct resource *res, + unsigned int flags) +{ + struct pci_bus_resource *bus_res; + + bus_res = kzalloc(sizeof(struct pci_bus_resource), GFP_KERNEL); + if (!bus_res) { + dev_err(&bus->dev, "can't add %pR resource\n", res); + return; + } + + bus_res->res = res; + bus_res->flags = flags; + list_add_tail(&bus_res->list, &bus->resources); +} + +struct resource *pci_bus_get_resource(struct pci_bus *bus, unsigned long flags, + int num) +{ + struct pci_bus_resource *bus_res; + struct resource *res; + + list_for_each_entry(bus_res, &bus->resources, list) { + if (!(bus_res->flags & PCI_POSITIVE_DECODE)) + continue; + + res = bus_res->res; + if (((res->flags & flags) == flags) && num-- == 0) + return res; + } + return NULL; +} + +void pci_bus_remove_resources(struct pci_bus *bus) +{ + struct pci_bus_resource *bus_res, *tmp; + + list_for_each_entry_safe(bus_res, tmp, &bus->resources, list) { + list_del(&bus_res->list); + kfree(bus_res); + } +} + /** * pci_bus_alloc_resource - allocate a resource from a parent bus * @bus: PCI bus @@ -42,7 +85,8 @@ pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res, resource_size_t), void *alignf_data) { - int i, ret = -ENOMEM; + int ret = -ENOMEM; + struct pci_bus_resource *bus_res; resource_size_t max = -1; type_mask |= IORESOURCE_IO | IORESOURCE_MEM; @@ -51,8 +95,8 @@ pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res, if (!(res->flags & IORESOURCE_MEM_64)) max = PCIBIOS_MAX_MEM_32; - for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) { - struct resource *r = bus->resource[i]; + list_for_each_entry(bus_res, &bus->resources, list) { + struct resource *r = bus_res->res; if (!r) continue; diff --git a/drivers/pci/hotplug/shpchp_sysfs.c b/drivers/pci/hotplug/shpchp_sysfs.c index 29fa9d2..e1a9d6a 100644 --- a/drivers/pci/hotplug/shpchp_sysfs.c +++ b/drivers/pci/hotplug/shpchp_sysfs.c @@ -39,16 +39,17 @@ static ssize_t show_ctrl (struct device *dev, struct device_attribute *attr, cha { struct pci_dev *pdev; char * out = buf; - int index, busnr; + int busnr; struct resource *res; struct pci_bus *bus; + struct pci_bus_resource *bus_res; pdev = container_of (dev, struct pci_dev, dev); bus = pdev->subordinate; out += sprintf(buf, "Free resources: memory\n"); - for (index = 0; index < PCI_BUS_NUM_RESOURCES; index++) { - res = bus->resource[index]; + list_for_each_entry(bus_res, &bus->resources, list) { + res = bus_res->res; if (res && (res->flags & IORESOURCE_MEM) && !(res->flags & IORESOURCE_PREFETCH)) { out += sprintf(out, "start = %8.8llx, " @@ -58,8 +59,8 @@ static ssize_t show_ctrl (struct device *dev, struct device_attribute *attr, cha } } out += sprintf(out, "Free resources: prefetchable memory\n"); - for (index = 0; index < PCI_BUS_NUM_RESOURCES; index++) { - res = bus->resource[index]; + list_for_each_entry(bus_res, &bus->resources, list) { + res = bus_res->res; if (res && (res->flags & IORESOURCE_MEM) && (res->flags & IORESOURCE_PREFETCH)) { out += sprintf(out, "start = %8.8llx, " @@ -69,8 +70,8 @@ static ssize_t show_ctrl (struct device *dev, struct device_attribute *attr, cha } } out += sprintf(out, "Free resources: IO\n"); - for (index = 0; index < PCI_BUS_NUM_RESOURCES; index++) { - res = bus->resource[index]; + list_for_each_entry(bus_res, &bus->resources, list) { + res = bus_res->res; if (res && (res->flags & IORESOURCE_IO)) { out += sprintf(out, "start = %8.8llx, " "length = %8.8llx\n", diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index d62a5de..60a6a88 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -385,11 +385,11 @@ struct resource * pci_find_parent_resource(const struct pci_dev *dev, struct resource *res) { const struct pci_bus *bus = dev->bus; - int i; + struct pci_bus_resource *bus_res; struct resource *best = NULL; - for(i = 0; i < PCI_BUS_NUM_RESOURCES; i++) { - struct resource *r = bus->resource[i]; + list_for_each_entry(bus_res, &bus->resources, list) { + struct resource *r = bus_res->res; if (!r) continue; if (res->start && !(res->start >= r->start && res->end <= r->end)) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index fbff005..b2d2e1e 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -89,6 +89,7 @@ static void release_pcibus_dev(struct device *dev) if (pci_bus->bridge) put_device(pci_bus->bridge); + pci_bus_remove_resources(pci_bus); kfree(pci_bus); } @@ -288,7 +289,8 @@ static void __devinit pci_read_bridge_io(struct pci_bus *child) unsigned long base, limit; struct resource *res; - res = child->resource[0]; + res = &dev->resource[PCI_BRIDGE_RESOURCES + 0]; + pci_read_config_byte(dev, PCI_IO_BASE, &io_base_lo); pci_read_config_byte(dev, PCI_IO_LIMIT, &io_limit_lo); base = (io_base_lo & PCI_IO_RANGE_MASK) << 8; @@ -319,7 +321,8 @@ static void __devinit pci_read_bridge_mmio(struct pci_bus *child) unsigned long base, limit; struct resource *res; - res = child->resource[1]; + res = &dev->resource[PCI_BRIDGE_RESOURCES + 1]; + pci_read_config_word(dev, PCI_MEMORY_BASE, &mem_base_lo); pci_read_config_word(dev, PCI_MEMORY_LIMIT, &mem_limit_lo); base = (mem_base_lo & PCI_MEMORY_RANGE_MASK) << 16; @@ -339,7 +342,8 @@ static void __devinit pci_read_bridge_mmio_pref(struct pci_bus *child) unsigned long base, limit; struct resource *res; - res = child->resource[2]; + res = &dev->resource[PCI_BRIDGE_RESOURCES + 2]; + pci_read_config_word(dev, PCI_PREF_MEMORY_BASE, &mem_base_lo); pci_read_config_word(dev, PCI_PREF_MEMORY_LIMIT, &mem_limit_lo); base = (mem_base_lo & PCI_PREF_RANGE_MASK) << 16; @@ -382,7 +386,7 @@ static void __devinit pci_read_bridge_mmio_pref(struct pci_bus *child) void __devinit pci_read_bridge_bases(struct pci_bus *child) { struct pci_dev *dev = child->self; - int i; + struct pci_bus_resource *bus_res; if (pci_is_root_bus(child)) /* It's a host bus, nothing to read */ return; @@ -396,12 +400,11 @@ void __devinit pci_read_bridge_bases(struct pci_bus *child) pci_read_bridge_mmio_pref(child); if (dev->transparent) { - for (i = 3; i < PCI_BUS_NUM_RESOURCES; i++) { - child->resource[i] = child->parent->resource[i - 3]; - if (child->resource[i]) - dev_printk(KERN_DEBUG, &dev->dev, - " bridge window %pR (subtractive decode)\n", - child->resource[i]); + list_for_each_entry(bus_res, &child->parent->resources, list) { + pci_bus_add_resource(child, bus_res->res, 0); + dev_printk(KERN_DEBUG, &dev->dev, + " bridge window %pR (subtractive decode)\n", + bus_res->res); } } } @@ -416,6 +419,7 @@ static struct pci_bus * pci_alloc_bus(void) INIT_LIST_HEAD(&b->children); INIT_LIST_HEAD(&b->devices); INIT_LIST_HEAD(&b->slots); + INIT_LIST_HEAD(&b->resources); b->max_bus_speed = PCI_SPEED_UNKNOWN; b->cur_bus_speed = PCI_SPEED_UNKNOWN; } @@ -561,6 +565,7 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent, { struct pci_bus *child; int i; + struct resource *res; /* * Allocate a new bus, and inherit stuff from the parent.. @@ -599,9 +604,11 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent, /* Set up default resource pointers and names.. */ for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; i++) { - child->resource[i] = &bridge->resource[PCI_BRIDGE_RESOURCES+i]; - child->resource[i]->name = child->name; + res = &bridge->resource[PCI_BRIDGE_RESOURCES + i]; + res->name = child->name; + pci_bus_add_resource(child, res, PCI_POSITIVE_DECODE); } + bridge->subordinate = child; return child; @@ -1427,8 +1434,8 @@ struct pci_bus * pci_create_bus(struct device *parent, pci_create_legacy_files(b); b->number = b->secondary = bus; - b->resource[0] = &ioport_resource; - b->resource[1] = &iomem_resource; + pci_bus_add_resource(b, &ioport_resource, 0); + pci_bus_add_resource(b, &iomem_resource, 0); return b; diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c index 52fbd42..1dbff3a 100644 --- a/drivers/pci/setup-bus.c +++ b/drivers/pci/setup-bus.c @@ -68,58 +68,53 @@ static void pbus_assign_resources_sorted(const struct pci_bus *bus) } } -void pci_setup_cardbus(struct pci_bus *bus) +static void pci_setup_cardbus_window(struct pci_dev *bridge, char *type, int n, + struct resource *res, int base_reg, int limit_reg) { - struct pci_dev *bridge = bus->self; - struct resource *res; struct pci_bus_region region; + u32 base, limit; - dev_info(&bridge->dev, "CardBus bridge to [bus %02x-%02x]\n", - bus->secondary, bus->subordinate); - - res = bus->resource[0]; - pcibios_resource_to_bus(bridge, ®ion, res); - if (res->flags & IORESOURCE_IO) { + if (!res) { /* - * The IO resource is allocated a range twice as large as it - * would normally need. This allows us to set both IO regs. + * Maybe we should disable the window, but the previous + * code left it alone. */ - dev_info(&bridge->dev, " bridge window %pR\n", res); - pci_write_config_dword(bridge, PCI_CB_IO_BASE_0, - region.start); - pci_write_config_dword(bridge, PCI_CB_IO_LIMIT_0, - region.end); + pci_read_config_dword(bridge, base_reg, &base); + pci_read_config_dword(bridge, limit_reg, &limit); + dev_info(&bridge->dev, " no %s%d resource, leaving bridge programmed with base %#08x limit %#08x\n", + type, n, base, limit); + return; } - res = bus->resource[1]; pcibios_resource_to_bus(bridge, ®ion, res); - if (res->flags & IORESOURCE_IO) { - dev_info(&bridge->dev, " bridge window %pR\n", res); - pci_write_config_dword(bridge, PCI_CB_IO_BASE_1, - region.start); - pci_write_config_dword(bridge, PCI_CB_IO_LIMIT_1, - region.end); - } + pci_write_config_dword(bridge, base_reg, region.start); + pci_write_config_dword(bridge, limit_reg, region.end); + dev_info(&bridge->dev, " bridge window %pR\n", res); +} - res = bus->resource[2]; - pcibios_resource_to_bus(bridge, ®ion, res); - if (res->flags & IORESOURCE_MEM) { - dev_info(&bridge->dev, " bridge window %pR\n", res); - pci_write_config_dword(bridge, PCI_CB_MEMORY_BASE_0, - region.start); - pci_write_config_dword(bridge, PCI_CB_MEMORY_LIMIT_0, - region.end); - } +void pci_setup_cardbus(struct pci_bus *bus) +{ + struct pci_dev *bridge = bus->self; - res = bus->resource[3]; - pcibios_resource_to_bus(bridge, ®ion, res); - if (res->flags & IORESOURCE_MEM) { - dev_info(&bridge->dev, " bridge window %pR\n", res); - pci_write_config_dword(bridge, PCI_CB_MEMORY_BASE_1, - region.start); - pci_write_config_dword(bridge, PCI_CB_MEMORY_LIMIT_1, - region.end); - } + dev_info(&bridge->dev, "CardBus bridge to [bus %02x-%02x]\n", + bus->secondary, bus->subordinate); + + /* + * The IO resource is allocated a range twice as large as it + * would normally need. This allows us to set both IO regs. + */ + pci_setup_cardbus_window(bridge, "io", 0, + pci_bus_get_resource(bus, IORESOURCE_IO, 0), + PCI_CB_IO_BASE_0, PCI_CB_IO_LIMIT_0); + pci_setup_cardbus_window(bridge, "io", 1, + pci_bus_get_resource(bus, IORESOURCE_IO, 1), + PCI_CB_IO_BASE_1, PCI_CB_IO_LIMIT_1); + pci_setup_cardbus_window(bridge, "mem", 0, + pci_bus_get_resource(bus, IORESOURCE_MEM, 0), + PCI_CB_MEMORY_BASE_0, PCI_CB_MEMORY_LIMIT_0); + pci_setup_cardbus_window(bridge, "mem", 1, + pci_bus_get_resource(bus, IORESOURCE_MEM, 1), + PCI_CB_MEMORY_BASE_1, PCI_CB_MEMORY_LIMIT_1); } EXPORT_SYMBOL(pci_setup_cardbus); @@ -142,9 +137,9 @@ static void pci_setup_bridge_io(struct pci_bus *bus) u32 l, io_upper16; /* Set up the top and bottom of the PCI I/O segment for this bus. */ - res = bus->resource[0]; - pcibios_resource_to_bus(bridge, ®ion, res); - if (res->flags & IORESOURCE_IO) { + res = pci_bus_get_resource(bus, IORESOURCE_IO, 0); + if (res) { + pcibios_resource_to_bus(bridge, ®ion, res); pci_read_config_dword(bridge, PCI_IO_BASE, &l); l &= 0xffff0000; l |= (region.start >> 8) & 0x00f0; @@ -174,9 +169,9 @@ static void pci_setup_bridge_mmio(struct pci_bus *bus) u32 l; /* Set up the top and bottom of the PCI Memory segment for this bus. */ - res = bus->resource[1]; - pcibios_resource_to_bus(bridge, ®ion, res); - if (res->flags & IORESOURCE_MEM) { + res = pci_bus_get_resource(bus, IORESOURCE_MEM, 0); + if (res) { + pcibios_resource_to_bus(bridge, ®ion, res); l = (region.start >> 16) & 0xfff0; l |= region.end & 0xfff00000; dev_info(&bridge->dev, " bridge window %pR\n", res); @@ -201,9 +196,9 @@ static void pci_setup_bridge_mmio_pref(struct pci_bus *bus) /* Set up PREF base/limit. */ bu = lu = 0; - res = bus->resource[2]; - pcibios_resource_to_bus(bridge, ®ion, res); - if (res->flags & IORESOURCE_PREFETCH) { + res = pci_bus_get_resource(bus, IORESOURCE_MEM | IORESOURCE_PREFETCH, 0); + if (res) { + pcibios_resource_to_bus(bridge, ®ion, res); l = (region.start >> 16) & 0xfff0; l |= region.end & 0xfff00000; if (res->flags & IORESOURCE_MEM_64) { @@ -312,13 +307,13 @@ static void pci_bridge_check_ranges(struct pci_bus *bus) have non-NULL parent resource). */ static struct resource *find_free_bus_resource(struct pci_bus *bus, unsigned long type) { - int i; + struct pci_bus_resource *bus_res; struct resource *r; unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_PREFETCH; - for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) { - r = bus->resource[i]; + list_for_each_entry(bus_res, &bus->resources, list) { + r = bus_res->res; if (r == &ioport_resource || r == &iomem_resource) continue; if (r && (r->flags & type_mask) == type && !r->parent) @@ -606,15 +601,15 @@ EXPORT_SYMBOL(pci_bus_assign_resources); static void pci_bus_dump_res(struct pci_bus *bus) { - int i; + struct pci_bus_resource *bus_res; - for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) { - struct resource *res = bus->resource[i]; + list_for_each_entry(bus_res, &bus->resources, list) { + struct resource *res = bus_res->res; if (!res || !res->end || !res->flags) continue; - dev_printk(KERN_DEBUG, &bus->dev, "resource %d %pR\n", i, res); + dev_printk(KERN_DEBUG, &bus->dev, "resource %pR\n", res); } } diff --git a/drivers/pcmcia/rsrc_nonstatic.c b/drivers/pcmcia/rsrc_nonstatic.c index 45d75dc..cd15c51 100644 --- a/drivers/pcmcia/rsrc_nonstatic.c +++ b/drivers/pcmcia/rsrc_nonstatic.c @@ -786,8 +786,9 @@ static int adjust_io(struct pcmcia_socket *s, unsigned int action, unsigned long #ifdef CONFIG_PCI static int nonstatic_autoadd_resources(struct pcmcia_socket *s) { + struct pci_bus_resource *bus_res; struct resource *res; - int i, done = 0; + int done = 0; if (!s->cb_dev || !s->cb_dev->bus) return -ENODEV; @@ -803,8 +804,8 @@ static int nonstatic_autoadd_resources(struct pcmcia_socket *s) return -EINVAL; #endif - for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) { - res = s->cb_dev->bus->resource[i]; + list_for_each_entry(bus_res, &s->cb_dev->bus->resources, list) { + res = bus_res->res; if (!res) continue; diff --git a/drivers/pcmcia/yenta_socket.c b/drivers/pcmcia/yenta_socket.c index e4d12ac..9c5a80e 100644 --- a/drivers/pcmcia/yenta_socket.c +++ b/drivers/pcmcia/yenta_socket.c @@ -649,9 +649,10 @@ static int yenta_search_one_res(struct resource *root, struct resource *res, static int yenta_search_res(struct yenta_socket *socket, struct resource *res, u32 min) { - int i; - for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) { - struct resource *root = socket->dev->bus->resource[i]; + struct pci_bus_resource *bus_res; + + list_for_each_entry(bus_res, &socket->dev->bus->resources, list) { + struct resource *root = bus_res->res; if (!root) continue; diff --git a/include/linux/pci.h b/include/linux/pci.h index 6b2949c..36743ee 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -363,9 +363,13 @@ static inline void pci_add_saved_cap(struct pci_dev *pci_dev, hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space); } -#ifndef PCI_BUS_NUM_RESOURCES -#define PCI_BUS_NUM_RESOURCES 16 -#endif +#define PCI_POSITIVE_DECODE 1 + +struct pci_bus_resource { + struct list_head list; + struct resource *res; + unsigned int flags; +}; #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */ @@ -376,8 +380,7 @@ struct pci_bus { struct list_head devices; /* list of devices on this bus */ struct pci_dev *self; /* bridge device as seen by parent */ struct list_head slots; /* list of slots on this bus */ - struct resource *resource[PCI_BUS_NUM_RESOURCES]; - /* address space routed to this bus */ + struct list_head resources; /* address space routed to this bus */ struct pci_ops *ops; /* configuration access functions */ void *sysdata; /* hook for sys-specific extension */ @@ -823,6 +826,9 @@ int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *); void pci_release_selected_regions(struct pci_dev *, int); /* drivers/pci/bus.c */ +void pci_bus_add_resource(struct pci_bus *bus, struct resource *res, unsigned int flags); +struct resource *pci_bus_get_resource(struct pci_bus *bus, unsigned long flags, int num); +void pci_bus_remove_resources(struct pci_bus *bus); int __must_check pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res, resource_size_t size, resource_size_t align, resource_size_t min, -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/