diff options
| -rw-r--r-- | Documentation/kernel-parameters.txt | 3 | ||||
| -rw-r--r-- | MAINTAINERS | 10 | ||||
| -rw-r--r-- | arch/microblaze/pci/pci-common.c | 1 | ||||
| -rw-r--r-- | arch/x86/pci/acpi.c | 128 | ||||
| -rw-r--r-- | arch/x86/pci/amd_bus.c | 91 | ||||
| -rw-r--r-- | arch/x86/pci/broadcom_bus.c | 12 | ||||
| -rw-r--r-- | arch/x86/pci/bus_numa.c | 69 | ||||
| -rw-r--r-- | arch/x86/pci/bus_numa.h | 18 | ||||
| -rw-r--r-- | arch/x86/pci/common.c | 43 | ||||
| -rw-r--r-- | arch/x86/pci/i386.c | 2 | ||||
| -rw-r--r-- | drivers/pci/Makefile | 2 | ||||
| -rw-r--r-- | drivers/pci/host-bridge.c | 96 | ||||
| -rw-r--r-- | drivers/pci/pci-driver.c | 6 | ||||
| -rw-r--r-- | drivers/pci/pci.c | 30 | ||||
| -rw-r--r-- | drivers/pci/pcie/portdrv_core.c | 2 | ||||
| -rw-r--r-- | drivers/pci/probe.c | 154 | ||||
| -rw-r--r-- | drivers/pci/quirks.c | 58 | ||||
| -rw-r--r-- | include/asm-generic/pci-bridge.h | 6 | ||||
| -rw-r--r-- | include/linux/ioport.h | 7 | ||||
| -rw-r--r-- | include/linux/pci.h | 9 |
20 files changed, 442 insertions, 305 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index c1601e5a8b71..f995195409fd 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -2161,6 +2161,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted. on: Turn realloc on realloc same as realloc=on noari do not use PCIe ARI. + pcie_scan_all Scan all possible PCIe devices. Otherwise we + only look for one device below a PCIe downstream + port. pcie_aspm= [PCIE] Forcibly enable or disable PCIe Active State Power Management. diff --git a/MAINTAINERS b/MAINTAINERS index 490dd6e640ac..7560921a4e15 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -5128,19 +5128,13 @@ F: Documentation/powerpc/eeh-pci-error-recovery.txt PCI SUBSYSTEM M: Bjorn Helgaas <bhelgaas@google.com> L: linux-pci@vger.kernel.org -Q: http://patchwork.kernel.org/project/linux-pci/list/ -T: git git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci.git +Q: http://patchwork.ozlabs.org/project/linux-pci/list/ +T: git git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/linux.git S: Supported F: Documentation/PCI/ F: drivers/pci/ F: include/linux/pci* -PCI HOTPLUG -M: Bjorn Helgaas <bhelgaas@google.com> -L: linux-pci@vger.kernel.org -S: Supported -F: drivers/pci/hotplug - PCMCIA SUBSYSTEM P: Linux PCMCIA Team L: linux-pcmcia@lists.infradead.org diff --git a/arch/microblaze/pci/pci-common.c b/arch/microblaze/pci/pci-common.c index d10403dadd2b..ed22bfc5db14 100644 --- a/arch/microblaze/pci/pci-common.c +++ b/arch/microblaze/pci/pci-common.c @@ -1422,6 +1422,7 @@ int pcibios_enable_device(struct pci_dev *dev, int mask) static void __devinit pcibios_setup_phb_resources(struct pci_controller *hose, struct list_head *resources) { + unsigned long io_offset; struct resource *res; int i; diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c index ed2835e148b5..fc09c2754e08 100644 --- a/arch/x86/pci/acpi.c +++ b/arch/x86/pci/acpi.c @@ -9,11 +9,11 @@ struct pci_root_info { struct acpi_device *bridge; - char *name; + char name[16]; unsigned int res_num; struct resource *res; - struct list_head *resources; int busnum; + struct pci_sysdata sd; }; static bool pci_use_crs = true; @@ -245,13 +245,6 @@ setup_resource(struct acpi_resource *acpi_res, void *data) return AE_OK; } -static bool resource_contains(struct resource *res, resource_size_t point) -{ - if (res->start <= point && point <= res->end) - return true; - return false; -} - static void coalesce_windows(struct pci_root_info *info, unsigned long type) { int i, j; @@ -272,10 +265,7 @@ static void coalesce_windows(struct pci_root_info *info, unsigned long type) * our resources no longer match the ACPI _CRS, but * the kernel resource tree doesn't allow overlaps. */ - if (resource_contains(res1, res2->start) || - resource_contains(res1, res2->end) || - resource_contains(res2, res1->start) || - resource_contains(res2, res1->end)) { + if (resource_overlaps(res1, res2)) { res1->start = min(res1->start, res2->start); res1->end = max(res1->end, res2->end); dev_info(&info->bridge->dev, @@ -287,7 +277,8 @@ static void coalesce_windows(struct pci_root_info *info, unsigned long type) } } -static void add_resources(struct pci_root_info *info) +static void add_resources(struct pci_root_info *info, + struct list_head *resources) { int i; struct resource *res, *root, *conflict; @@ -311,53 +302,74 @@ static void add_resources(struct pci_root_info *info) "ignoring host bridge window %pR (conflicts with %s %pR)\n", res, conflict->name, conflict); else - pci_add_resource(info->resources, res); + pci_add_resource(resources, res); } } +static void free_pci_root_info_res(struct pci_root_info *info) +{ + kfree(info->res); + info->res = NULL; + info->res_num = 0; +} + +static void __release_pci_root_info(struct pci_root_info *info) +{ + int i; + struct resource *res; + + for (i = 0; i < info->res_num; i++) { + res = &info->res[i]; + + if (!res->parent) + continue; + + if (!(res->flags & (IORESOURCE_MEM | IORESOURCE_IO))) + continue; + + release_resource(res); + } + + free_pci_root_info_res(info); + + kfree(info); +} +static void release_pci_root_info(struct pci_host_bridge *bridge) +{ + struct pci_root_info *info = bridge->release_data; + + __release_pci_root_info(info); +} + static void -get_current_resources(struct acpi_device *device, int busnum, - int domain, struct list_head *resources) +probe_pci_root_info(struct pci_root_info *info, struct acpi_device *device, + int busnum, int domain) { - struct pci_root_info info; size_t size; - info.bridge = device; - info.res_num = 0; - info.resources = resources; + info->bridge = device; + info->res_num = 0; acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource, - &info); - if (!info.res_num) + info); + if (!info->res_num) return; - size = sizeof(*info.res) * info.res_num; - info.res = kmalloc(size, GFP_KERNEL); - if (!info.res) + size = sizeof(*info->res) * info->res_num; + info->res_num = 0; + info->res = kmalloc(size, GFP_KERNEL); + if (!info->res) return; - info.name = kasprintf(GFP_KERNEL, "PCI Bus %04x:%02x", domain, busnum); - if (!info.name) - goto name_alloc_fail; + sprintf(info->name, "PCI Bus %04x:%02x", domain, busnum); - info.res_num = 0; acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource, - &info); - - if (pci_use_crs) { - add_resources(&info); - - return; - } - - kfree(info.name); - -name_alloc_fail: - kfree(info.res); + info); } struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root) { struct acpi_device *device = root->device; + struct pci_root_info *info = NULL; int domain = root->segment; int busnum = root->secondary.start; LIST_HEAD(resources); @@ -389,17 +401,14 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root) if (node != -1 && !node_online(node)) node = -1; - /* Allocate per-root-bus (not per bus) arch-specific data. - * TODO: leak; this memory is never freed. - * It's arguable whether it's worth the trouble to care. - */ - sd = kzalloc(sizeof(*sd), GFP_KERNEL); - if (!sd) { + info = kzalloc(sizeof(*info), GFP_KERNEL); + if (!info) { printk(KERN_WARNING "pci_bus %04x:%02x: " "ignored (out of memory)\n", domain, busnum); return NULL; } + sd = &info->sd; sd->domain = domain; sd->node = node; /* @@ -413,22 +422,32 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root) * be replaced by sd. */ memcpy(bus->sysdata, sd, sizeof(*sd)); - kfree(sd); + kfree(info); } else { - get_current_resources(device, busnum, domain, &resources); + probe_pci_root_info(info, device, busnum, domain); /* * _CRS with no apertures is normal, so only fall back to * defaults or native bridge info if we're ignoring _CRS. */ - if (!pci_use_crs) + if (pci_use_crs) + add_resources(info, &resources); + else { + free_pci_root_info_res(info); x86_pci_root_bus_resources(busnum, &resources); + } + bus = pci_create_root_bus(NULL, busnum, &pci_root_ops, sd, &resources); - if (bus) + if (bus) { bus->subordinate = pci_scan_child_bus(bus); - else + pci_set_host_bridge_release( + to_pci_host_bridge(bus->bridge), + release_pci_root_info, info); + } else { pci_free_resource_list(&resources); + __release_pci_root_info(info); + } } /* After the PCI-E bus has been walked and all devices discovered, @@ -445,9 +464,6 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root) } } - if (!bus) - kfree(sd); - if (bus && node != -1) { #ifdef CONFIG_ACPI_NUMA if (pxm >= 0) diff --git a/arch/x86/pci/amd_bus.c b/arch/x86/pci/amd_bus.c index 0567df3890e1..5aed49bff058 100644 --- a/arch/x86/pci/amd_bus.c +++ b/arch/x86/pci/amd_bus.c @@ -32,6 +32,27 @@ static struct pci_hostbridge_probe pci_probes[] __initdata = { #define RANGE_NUM 16 +static struct pci_root_info __init *find_pci_root_info(int node, int link) +{ + struct pci_root_info *info; + + /* find the position */ + list_for_each_entry(info, &pci_root_infos, list) + if (info->node == node && info->link == link) + return info; + + return NULL; +} + +static void __init set_mp_bus_range_to_node(int min_bus, int max_bus, int node) +{ +#ifdef CONFIG_NUMA + int j; + + for (j = min_bus; j <= max_bus; j++) + set_mp_bus_to_node(j, node); +#endif +} /** * early_fill_mp_bus_to_node() * called before pcibios_scan_root and pci_scan_bus @@ -41,7 +62,6 @@ static struct pci_hostbridge_probe pci_probes[] __initdata = { static int __init early_fill_mp_bus_info(void) { int i; - int j; unsigned bus; unsigned slot; int node; @@ -50,7 +70,6 @@ static int __init early_fill_mp_bus_info(void) int def_link; struct pci_root_info *info; u32 reg; - struct resource *res; u64 start; u64 end; struct range range[RANGE_NUM]; @@ -86,7 +105,6 @@ static int __init early_fill_mp_bus_info(void) if (!found) return 0; - pci_root_num = 0; for (i = 0; i < 4; i++) { int min_bus; int max_bus; @@ -99,19 +117,11 @@ static int __init early_fill_mp_bus_info(void) min_bus = (reg >> 16) & 0xff; max_bus = (reg >> 24) & 0xff; node = (reg >> 4) & 0x07; -#ifdef CONFIG_NUMA - for (j = min_bus; j <= max_bus; j++) - set_mp_bus_to_node(j, node); -#endif + set_mp_bus_range_to_node(min_bus, max_bus, node); link = (reg >> 8) & 0x03; - info = &pci_root_info[pci_root_num]; - info->bus_min = min_bus; - info->bus_max = max_bus; - info->node = node; - info->link = link; + info = alloc_pci_root_info(min_bus, max_bus, node, link); sprintf(info->name, "PCI Bus #%02x", min_bus); - pci_root_num++; } /* get the default node and link for left over res */ @@ -134,16 +144,10 @@ static int __init early_fill_mp_bus_info(void) link = (reg >> 4) & 0x03; end = (reg & 0xfff000) | 0xfff; - /* find the position */ - for (j = 0; j < pci_root_num; j++) { - info = &pci_root_info[j]; - if (info->node == node && info->link == link) - break; - } - if (j == pci_root_num) + info = find_pci_root_info(node, link); + if (!info) continue; /* not found */ - info = &pci_root_info[j]; printk(KERN_DEBUG "node %d link %d: io port [%llx, %llx]\n", node, link, start, end); @@ -155,13 +159,8 @@ static int __init early_fill_mp_bus_info(void) } /* add left over io port range to def node/link, [0, 0xffff] */ /* find the position */ - for (j = 0; j < pci_root_num; j++) { - info = &pci_root_info[j]; - if (info->node == def_node && info->link == def_link) - break; - } - if (j < pci_root_num) { - info = &pci_root_info[j]; + info = find_pci_root_info(def_node, def_link); + if (info) { for (i = 0; i < RANGE_NUM; i++) { if (!range[i].end) continue; @@ -214,16 +213,10 @@ static int __init early_fill_mp_bus_info(void) end <<= 8; end |= 0xffff; - /* find the position */ - for (j = 0; j < pci_root_num; j++) { - info = &pci_root_info[j]; - if (info->node == node && info->link == link) - break; - } - if (j == pci_root_num) - continue; /* not found */ + info = find_pci_root_info(node, link); - info = &pci_root_info[j]; + if (!info) + continue; printk(KERN_DEBUG "node %d link %d: mmio [%llx, %llx]", node, link, start, end); @@ -291,14 +284,8 @@ static int __init early_fill_mp_bus_info(void) * add left over mmio range to def node/link ? * that is tricky, just record range in from start_min to 4G */ - for (j = 0; j < pci_root_num; j++) { - info = &pci_root_info[j]; - if (info->node == def_node && info->link == def_link) - break; - } - if (j < pci_root_num) { - info = &pci_root_info[j]; - + info = find_pci_root_info(def_node, def_link); + if (info) { for (i = 0; i < RANGE_NUM; i++) { if (!range[i].end) continue; @@ -309,20 +296,16 @@ static int __init early_fill_mp_bus_info(void) } } - for (i = 0; i < pci_root_num; i++) { - int res_num; + list_for_each_entry(info, &pci_root_infos, list) { int busnum; + struct pci_root_res *root_res; - info = &pci_root_info[i]; - res_num = info->res_num; busnum = info->bus_min; printk(KERN_DEBUG "bus: [%02x, %02x] on node %x link %x\n", info->bus_min, info->bus_max, info->node, info->link); - for (j = 0; j < res_num; j++) { - res = &info->res[j]; - printk(KERN_DEBUG "bus: %02x index %x %pR\n", - busnum, j, res); - } + list_for_each_entry(root_res, &info->resources, list) + printk(KERN_DEBUG "bus: %02x %pR\n", + busnum, &root_res->res); } return 0; diff --git a/arch/x86/pci/broadcom_bus.c b/arch/x86/pci/broadcom_bus.c index f3a7c569a403..614392ced7d6 100644 --- a/arch/x86/pci/broadcom_bus.c +++ b/arch/x86/pci/broadcom_bus.c @@ -22,19 +22,15 @@ static void __init cnb20le_res(u8 bus, u8 slot, u8 func) { struct pci_root_info *info; + struct pci_root_res *root_res; struct resource res; u16 word1, word2; u8 fbus, lbus; - int i; - - info = &pci_root_info[pci_root_num]; - pci_root_num++; /* read the PCI bus numbers */ fbus = read_pci_config_byte(bus, slot, func, 0x44); lbus = read_pci_config_byte(bus, slot, func, 0x45); - info->bus_min = fbus; - info->bus_max = lbus; + info = alloc_pci_root_info(fbus, lbus, 0, 0); /* * Add the legacy IDE ports on bus 0 @@ -86,8 +82,8 @@ static void __init cnb20le_res(u8 bus, u8 slot, u8 func) res.flags = IORESOURCE_BUS; printk(KERN_INFO "CNB20LE PCI Host Bridge (domain 0000 %pR)\n", &res); - for (i = 0; i < info->res_num; i++) - printk(KERN_INFO "host bridge window %pR\n", &info->res[i]); + list_for_each_entry(root_res, &info->resources, list) + printk(KERN_INFO "host bridge window %pR\n", &root_res->res); } static int __init broadcom_postcore_init(void) diff --git a/arch/x86/pci/bus_numa.c b/arch/x86/pci/bus_numa.c index fd3f65510e9d..306579f7d0fd 100644 --- a/arch/x86/pci/bus_numa.c +++ b/arch/x86/pci/bus_numa.c @@ -4,35 +4,38 @@ #include "bus_numa.h" -int pci_root_num; -struct pci_root_info pci_root_info[PCI_ROOT_NR]; +LIST_HEAD(pci_root_infos); -void x86_pci_root_bus_resources(int bus, struct list_head *resources) +static struct pci_root_info *x86_find_pci_root_info(int bus) { - int i; - int j; struct pci_root_info *info; - if (!pci_root_num) - goto default_resources; + if (list_empty(&pci_root_infos)) + return NULL; - for (i = 0; i < pci_root_num; i++) { - if (pci_root_info[i].bus_min == bus) - break; - } + list_for_each_entry(info, &pci_root_infos, list) + if (info->bus_min == bus) + return info; + + return NULL; +} - if (i == pci_root_num) +void x86_pci_root_bus_resources(int bus, struct list_head *resources) +{ + struct pci_root_info *info = x86_find_pci_root_info(bus); + struct pci_root_res *root_res; + + if (!info) goto default_resources; printk(KERN_DEBUG "PCI: root bus %02x: hardware-probed resources\n", bus); - info = &pci_root_info[i]; - for (j = 0; j < info->res_num; j++) { + list_for_each_entry(root_res, &info->resources, list) { struct resource *res; struct resource *root; - res = &info->res[j]; + res = &root_res->res; pci_add_resource(resources, res); if (res->flags & IORESOURCE_IO) root = &ioport_resource; @@ -53,11 +56,32 @@ default_resources: pci_add_resource(resources, &iomem_resource); } +struct pci_root_info __init *alloc_pci_root_info(int bus_min, int bus_max, + int node, int link) +{ + struct pci_root_info *info; + + info = kzalloc(sizeof(*info), GFP_KERNEL); + + if (!info) + return info; + + INIT_LIST_HEAD(&info->resources); + info->bus_min = bus_min; + info->bus_max = bus_max; + info->node = node; + info->link = link; + + list_add_tail(&info->list, &pci_root_infos); + + return info; +} + void __devinit update_res(struct pci_root_info *info, resource_size_t start, resource_size_t end, unsigned long flags, int merge) { - int i; struct resource *res; + struct pci_root_res *root_res; if (start > end) return; @@ -69,11 +93,11 @@ void __devinit update_res(struct pci_root_info *info, resource_size_t start, goto addit; /* try to merge it with old one */ - for (i = 0; i < info->res_num; i++) { + list_for_each_entry(root_res, &info->resources, list) { resource_size_t final_start, final_end; resource_size_t common_start, common_end; - res = &info->res[i]; + res = &root_res->res; if (res->flags != flags) continue; @@ -93,14 +117,15 @@ void __devinit update_res(struct pci_root_info *info, resource_size_t start, addit: /* need to add that */ - if (info->res_num >= RES_NUM) + root_res = kzalloc(sizeof(*root_res), GFP_KERNEL); + if (!root_res) return; - res = &info->res[info->res_num]; + res = &root_res->res; res->name = info->name; res->flags = flags; res->start = start; res->end = end; - res->child = NULL; - info->res_num++; + + list_add_tail(&root_res->list, &info->resources); } diff --git a/arch/x86/pci/bus_numa.h b/arch/x86/pci/bus_numa.h index 804a4b40c31a..226a466b2b2b 100644 --- a/arch/x86/pci/bus_numa.h +++ b/arch/x86/pci/bus_numa.h @@ -4,22 +4,24 @@ * sub bus (transparent) will use entres from 3 to store extra from * root, so need to make sure we have enough slot there. */ -#define RES_NUM 16 +struct pci_root_res { + struct list_head list; + struct resource res; +}; + struct pci_root_info { + struct list_head list; char name[12]; - unsigned int res_num; - struct resource res[RES_NUM]; + struct list_head resources; int bus_min; int bus_max; int node; int link; }; -/* 4 at this time, it may become to 32 */ -#define PCI_ROOT_NR 4 -extern int pci_root_num; -extern struct pci_root_info pci_root_info[PCI_ROOT_NR]; - +extern struct list_head pci_root_infos; +struct pci_root_info *alloc_pci_root_info(int bus_min, int bus_max, + int node, int link); extern void update_res(struct pci_root_info *info, resource_size_t start, resource_size_t end, unsigned long flags, int merge); #endif diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c index 323481e06ef8..0ad990a20d4a 100644 --- a/arch/x86/pci/common.c +++ b/arch/x86/pci/common.c @@ -11,6 +11,7 @@ #include <linux/dmi.h> #include <linux/slab.h> +#include <asm-generic/pci-bridge.h> #include <asm/acpi.h> #include <asm/segment.h> #include <asm/io.h> @@ -229,6 +230,14 @@ static int __devinit assign_all_busses(const struct dmi_system_id *d) } #endif +static int __devinit set_scan_all(const struct dmi_system_id *d) +{ + printk(KERN_INFO "PCI: %s detected, enabling pci=pcie_scan_all\n", + d->ident); + pci_add_flags(PCI_SCAN_ALL_PCIE_DEVS); + return 0; +} + static const struct dmi_system_id __devinitconst pciprobe_dmi_table[] = { #ifdef __i386__ /* @@ -420,6 +429,13 @@ static const struct dmi_system_id __devinitconst pciprobe_dmi_table[] = { DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL585 G2"), }, }, + { + .callback = set_scan_all, + .ident = "Stratus/NEC ftServer", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ftServer"), + }, + }, {} }; @@ -430,9 +446,7 @@ void __init dmi_check_pciprobe(void) struct pci_bus * __devinit pcibios_scan_root(int busnum) { - LIST_HEAD(resources); struct pci_bus *bus = NULL; - struct pci_sysdata *sd; while ((bus = pci_find_next_bus(bus)) != NULL) { if (bus->number == busnum) { @@ -441,28 +455,10 @@ struct pci_bus * __devinit pcibios_scan_root(int busnum) } } - /* Allocate per-root-bus (not per bus) arch-specific data. - * TODO: leak; this memory is never freed. - * It's arguable whether it's worth the trouble to care. - */ - sd = kzalloc(sizeof(*sd), GFP_KERNEL); - if (!sd) { - printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum); - return NULL; - } - - sd->node = get_mp_bus_to_node(busnum); - - printk(KERN_DEBUG "PCI: Probing PCI hardware (bus %02x)\n", busnum); - x86_pci_root_bus_resources(busnum, &resources); - bus = pci_scan_root_bus(NULL, busnum, &pci_root_ops, sd, &resources); - if (!bus) { - pci_free_resource_list(&resources); - kfree(sd); - } - - return bus; + return pci_scan_bus_on_node(busnum, &pci_root_ops, + get_mp_bus_to_node(busnum)); } + void __init pcibios_set_cache_line_size(void) { struct cpuinfo_x86 *c = &boot_cpu_data; @@ -656,6 +652,7 @@ struct pci_bus * __devinit pci_scan_bus_on_node(int busno, struct pci_ops *ops, } sd->node = node; x86_pci_root_bus_resources(busno, &resources); + printk(KERN_DEBUG "PCI: Probing PCI hardware (bus %02x)\n", busno); bus = pci_scan_root_bus(NULL, busno, ops, sd, &resources); if (!bus) { pci_free_resource_list(&resources); diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c index 831971e731f7..dd8ca6f7223b 100644 --- a/arch/x86/pci/i386.c +++ b/arch/x86/pci/i386.c @@ -57,7 +57,7 @@ static struct pcibios_fwaddrmap *pcibios_fwaddrmap_lookup(struct pci_dev *dev) { struct pcibios_fwaddrmap *map; - WARN_ON(!spin_is_locked(&pcibios_fwaddrmap_lock)); + WARN_ON_SMP(!spin_is_locked(&pcibios_fwaddrmap_lock)); list_for_each_entry(map, &pcibios_fwaddrmappings, list) if (map->dev == dev) diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile index 165274c064bc..01c001f3b766 100644 --- a/drivers/pci/Makefile +++ b/drivers/pci/Makefile @@ -2,7 +2,7 @@ # Makefile for the PCI bus specific drivers. # -obj-y += access.o bus.o probe.o remove.o pci.o \ +obj-y += access.o bus.o probe.o host-bridge.o remove.o pci.o \ pci-driver.o search.o pci-sysfs.o rom.o setup-res.o \ irq.o vpd.o obj-$(CONFIG_PROC_FS) += proc.o diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c new file mode 100644 index 000000000000..a68dc613a5be --- /dev/null +++ b/drivers/pci/host-bridge.c @@ -0,0 +1,96 @@ +/* + * host bridge related code + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <linux/module.h> + +#include "pci.h" + +static struct pci_bus *find_pci_root_bus(struct pci_dev *dev) +{ + struct pci_bus *bus; + + bus = dev->bus; + while (bus->parent) + bus = bus->parent; + + return bus; +} + +static struct pci_host_bridge *find_pci_host_bridge(struct pci_dev *dev) +{ + struct pci_bus *bus = find_pci_root_bus(dev); + + return to_pci_host_bridge(bus->bridge); +} + +void pci_set_host_bridge_release(struct pci_host_bridge *bridge, + void (*release_fn)(struct pci_host_bridge *), + void *release_data) +{ + bridge->release_fn = release_fn; + bridge->release_data = release_data; +} + +static bool resource_contains(struct resource *res1, struct resource *res2) +{ + return res1->start <= res2->start && res1->end >= res2->end; +} + +void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region, + struct resource *res) +{ + struct pci_host_bridge *bridge = find_pci_host_bridge(dev); + struct pci_host_bridge_window *window; + resource_size_t offset = 0; + + list_for_each_entry(window, &bridge->windows, list) { + if (resource_type(res) != resource_type(window->res)) + continue; + + if (resource_contains(window->res, res)) { + offset = window->offset; + break; + } + } + + region->start = res->start - offset; + region->end = res->end - offset; +} +EXPORT_SYMBOL(pcibios_resource_to_bus); + +static bool region_contains(struct pci_bus_region *region1, + struct pci_bus_region *region2) +{ + return region1->start <= region2->start && region1->end >= region2->end; +} + +void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res, + struct pci_bus_region *region) +{ + struct pci_host_bridge *bridge = find_pci_host_bridge(dev); + struct pci_host_bridge_window *window; + resource_size_t offset = 0; + + list_for_each_entry(window, &bridge->windows, list) { + struct pci_bus_region bus_region; + + if (resource_type(res) != resource_type(window->res)) + continue; + + bus_region.start = window->res->start - window->offset; + bus_region.end = window->res->end - window->offset; + + if (region_contains(&bus_region, region)) { + offset = window->offset; + break; + } + } + + res->start = region->start + offset; + res->end = region->end + offset; +} +EXPORT_SYMBOL(pcibios_bus_to_resource); diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index 6b54b23b990b..bf0cee629b60 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -421,6 +421,12 @@ static void pci_device_shutdown(struct device *dev) pci_msix_shutdown(pci_dev); /* + * Turn off Bus Master bit on the device to tell it to not + * continue to do DMA + */ + pci_disable_device(pci_dev); + + /* * Devices may be enabled to wake up by runtime PM, but they need not * be supposed to wake up the system from its "power off" state (e.g. * ACPI S5). Therefore disable wakeup for all devices that aren't diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 111569ccab43..8f169002dc7e 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -22,6 +22,7 @@ #include <linux/interrupt.h> #include <linux/device.h> #include <linux/pm_runtime.h> +#include <asm-generic/pci-bridge.h> #include <asm/setup.h> #include "pci.h" @@ -3164,18 +3165,12 @@ static int pci_parent_bus_reset(struct pci_dev *dev, int probe) return 0; } -static int pci_dev_reset(struct pci_dev *dev, int probe) +static int __pci_dev_reset(struct pci_dev *dev, int probe) { int rc; might_sleep(); - if (!probe) { - pci_cfg_access_lock(dev); - /* block PM suspend, driver probe, etc. */ - device_lock(&dev->dev); - } - rc = pci_dev_specific_reset(dev, probe); if (rc != -ENOTTY) goto done; @@ -3194,14 +3189,27 @@ static int pci_dev_reset(struct pci_dev *dev, int probe) rc = pci_parent_bus_reset(dev, probe); done: + return rc; +} + +static int pci_dev_reset(struct pci_dev *dev, int probe) +{ + int rc; + + if (!probe) { + pci_cfg_access_lock(dev); + /* block PM suspend, driver probe, etc. */ + device_lock(&dev->dev); + } + + rc = __pci_dev_reset(dev, probe); + if (!probe) { device_unlock(&dev->dev); pci_cfg_access_unlock(dev); } - return rc; } - /** * __pci_reset_function - reset a PCI device function * @dev: PCI device to reset @@ -3246,7 +3254,7 @@ EXPORT_SYMBOL_GPL(__pci_reset_function); */ int __pci_reset_function_locked(struct pci_dev *dev) { - return pci_dev_reset(dev, 1); + return __pci_dev_reset(dev, 0); } EXPORT_SYMBOL_GPL(__pci_reset_function_locked); @@ -3893,6 +3901,8 @@ static int __init pci_setup(char *str) pcie_bus_config = PCIE_BUS_PERFORMANCE; } else if (!strncmp(str, "pcie_bus_peer2peer", 18)) { pcie_bus_config = PCIE_BUS_PEER2PEER; + } else if (!strncmp(str, "pcie_scan_all", 13)) { + pci_add_flags(PCI_SCAN_ALL_PCIE_DEVS); } else { printk(KERN_ERR "PCI: Unknown option `%s'\n", str); diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c index 2f589a54f9bd..75915b30ad19 100644 --- a/drivers/pci/pcie/portdrv_core.c +++ b/drivers/pci/pcie/portdrv_core.c @@ -249,7 +249,7 @@ static int get_port_device_capability(struct pci_dev *dev) int services = 0, pos; u16 reg16; u32 reg32; - int cap_mask; + int cap_mask = 0; int err; if (pcie_ports_disabled) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 5e1ca3c58a7d..658ac977cb56 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -10,18 +10,16 @@ #include <linux/module.h> #include <linux/cpumask.h> #include <linux/pci-aspm.h> +#include <asm-generic/pci-bridge.h> #include "pci.h" #define CARDBUS_LATENCY_TIMER 176 /* secondary latency timer */ #define CARDBUS_RESERVE_BUSNR 3 -static LIST_HEAD(pci_host_bridges); - /* Ugh. Need to stop exporting this to modules. */ LIST_HEAD(pci_root_buses); EXPORT_SYMBOL(pci_root_buses); - static int find_anything(struct device *dev, void *data) { return 1; @@ -44,82 +42,6 @@ int no_pci_devices(void) } EXPORT_SYMBOL(no_pci_devices); -static struct pci_host_bridge *pci_host_bridge(struct pci_dev *dev) -{ - struct pci_bus *bus; - struct pci_host_bridge *bridge; - - bus = dev->bus; - while (bus->parent) - bus = bus->parent; - - list_for_each_entry(bridge, &pci_host_bridges, list) { - if (bridge->bus == bus) - return bridge; - } - - return NULL; -} - -static bool resource_contains(struct resource *res1, struct resource *res2) -{ - return res1->start <= res2->start && res1->end >= res2->end; -} - -void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region, - struct resource *res) -{ - struct pci_host_bridge *bridge = pci_host_bridge(dev); - struct pci_host_bridge_window *window; - resource_size_t offset = 0; - - list_for_each_entry(window, &bridge->windows, list) { - if (resource_type(res) != resource_type(window->res)) - continue; - - if (resource_contains(window->res, res)) { - offset = window->offset; - break; - } - } - - region->start = res->start - offset; - region->end = res->end - offset; -} -EXPORT_SYMBOL(pcibios_resource_to_bus); - -static bool region_contains(struct pci_bus_region *region1, - struct pci_bus_region *region2) -{ - return region1->start <= region2->start && region1->end >= region2->end; -} - -void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res, - struct pci_bus_region *region) -{ - struct pci_host_bridge *bridge = pci_host_bridge(dev); - struct pci_host_bridge_window *window; - struct pci_bus_region bus_region; - resource_size_t offset = 0; - - list_for_each_entry(window, &bridge->windows, list) { - if (resource_type(res) != resource_type(window->res)) - continue; - - bus_region.start = window->res->start - window->offset; - bus_region.end = window->res->end - window->offset; - - if (region_contains(&bus_region, region)) { - offset = window->offset; - break; - } - } - - res->start = region->start + offset; - res->end = region->end + offset; -} -EXPORT_SYMBOL(pcibios_bus_to_resource); - /* * PCI Bus Class */ @@ -501,6 +423,19 @@ static struct pci_bus * pci_alloc_bus(void) return b; } +static struct pci_host_bridge *pci_alloc_host_bridge(struct pci_bus *b) +{ + struct pci_host_bridge *bridge; + + bridge = kzalloc(sizeof(*bridge), GFP_KERNEL); + if (bridge) { + INIT_LIST_HEAD(&bridge->windows); + bridge->bus = b; + } + + return bridge; +} + static unsigned char pcix_bus_speed[] = { PCI_SPEED_UNKNOWN, /* 0 */ PCI_SPEED_66MHz_PCIX, /* 1 */ @@ -1201,7 +1136,14 @@ int pci_cfg_space_size(struct pci_dev *dev) static void pci_release_bus_bridge_dev(struct device *dev) { - kfree(dev); + struct pci_host_bridge *bridge = to_pci_host_bridge(dev); + + if (bridge->release_fn) + bridge->release_fn(bridge); + + pci_free_resource_list(&bridge->windows); + + kfree(bridge); } struct pci_dev *alloc_pci_dev(void) @@ -1395,10 +1337,13 @@ static unsigned no_next_fn(struct pci_dev *dev, unsigned fn) static int only_one_child(struct pci_bus *bus) { struct pci_dev *parent = bus->self; + if (!parent || !pci_is_pcie(parent)) return 0; - if (parent->pcie_type == PCI_EXP_TYPE_ROOT_PORT || - parent->pcie_type == PCI_EXP_TYPE_DOWNSTREAM) + if (parent->pcie_type == PCI_EXP_TYPE_ROOT_PORT) + return 1; + if (parent->pcie_type == PCI_EXP_TYPE_DOWNSTREAM && + !pci_has_flag(PCI_SCAN_ALL_PCIE_DEVS)) return 1; return 0; } @@ -1650,28 +1595,19 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus, int error; struct pci_host_bridge *bridge; struct pci_bus *b, *b2; - struct device *dev; struct pci_host_bridge_window *window, *n; struct resource *res; resource_size_t offset; char bus_addr[64]; char *fmt; - bridge = kzalloc(sizeof(*bridge), GFP_KERNEL); - if (!bridge) - return NULL; b = pci_alloc_bus(); if (!b) - goto err_bus; - - dev = kzalloc(sizeof(*dev), GFP_KERNEL); - if (!dev) - goto err_dev; + return NULL; b->sysdata = sysdata; b->ops = ops; - b2 = pci_find_bus(pci_domain_nr(b), bus); if (b2) { /* If we already got to this bus through a different bridge, ignore it */ @@ -1679,13 +1615,17 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus, goto err_out; } - dev->parent = parent; - dev->release = pci_release_bus_bridge_dev; - dev_set_name(dev, "pci%04x:%02x", pci_domain_nr(b), bus); - error = device_register(dev); + bridge = pci_alloc_host_bridge(b); + if (!bridge) + goto err_out; + + bridge->dev.parent = parent; + bridge->dev.release = pci_release_bus_bridge_dev; + dev_set_name(&bridge->dev, "pci%04x:%02x", pci_domain_nr(b), bus); + error = device_register(&bridge->dev); if (error) - goto dev_reg_err; - b->bridge = get_device(dev); + goto bridge_dev_reg_err; + b->bridge = get_device(&bridge->dev); device_enable_async_suspend(b->bridge); pci_set_bus_of_node(b); @@ -1704,9 +1644,6 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus, b->number = b->secondary = bus; - bridge->bus = b; - INIT_LIST_HEAD(&bridge->windows); - if (parent) dev_info(parent, "PCI host bridge to bus %s\n", dev_name(&b->dev)); else @@ -1732,25 +1669,18 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus, } down_write(&pci_bus_sem); - list_add_tail(&bridge->list, &pci_host_bridges); list_add_tail(&b->node, &pci_root_buses); up_write(&pci_bus_sem); return b; class_dev_reg_err: - device_unregister(dev); -dev_reg_err: - down_write(&pci_bus_sem); - list_del(&bridge->list); - list_del(&b->node); - up_write(&pci_bus_sem); + put_device(&bridge->dev); + device_unregister(&bridge->dev); +bridge_dev_reg_err: + kfree(bridge); err_out: - kfree(dev); -err_dev: kfree(b); -err_bus: - kfree(bridge); return NULL; } diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 953ec3f08470..2a7521677541 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -3097,16 +3097,74 @@ static int reset_intel_82599_sfp_virtfn(struct pci_dev *dev, int probe) return 0; } +#include "../gpu/drm/i915/i915_reg.h" +#define MSG_CTL 0x45010 +#define NSDE_PWR_STATE 0xd0100 +#define IGD_OPERATION_TIMEOUT 10000 /* set timeout 10 seconds */ + +static int reset_ivb_igd(struct pci_dev *dev, int probe) +{ + void __iomem *mmio_base; + unsigned long timeout; + u32 val; + + if (probe) + return 0; + + mmio_base = pci_iomap(dev, 0, 0); + if (!mmio_base) + return -ENOMEM; + + iowrite32(0x00000002, mmio_base + MSG_CTL); + + /* + * Clobbering SOUTH_CHICKEN2 register is fine only if the next + * driver loaded sets the right bits. However, this's a reset and + * the bits have been set by i915 previously, so we clobber + * SOUTH_CHICKEN2 register directly here. + */ + iowrite32(0x00000005, mmio_base + SOUTH_CHICKEN2); + + val = ioread32(mmio_base + PCH_PP_CONTROL) & 0xfffffffe; + iowrite32(val, mmio_base + PCH_PP_CONTROL); + + timeout = jiffies + msecs_to_jiffies(IGD_OPERATION_TIMEOUT); + do { + val = ioread32(mmio_base + PCH_PP_STATUS); + if ((val & 0xb0000000) == 0) + goto reset_complete; + msleep(10); + } while (time_before(jiffies, timeout)); + dev_warn(&dev->dev, "timeout during reset\n"); + +reset_complete: + iowrite32(0x00000002, mmio_base + NSDE_PWR_STATE); + + pci_iounmap(dev, mmio_base); + return 0; +} + #define PCI_DEVICE_ID_INTEL_82599_SFP_VF 0x10ed +#define PCI_DEVICE_ID_INTEL_IVB_M_VGA 0x0156 +#define PCI_DEVICE_ID_INTEL_IVB_M2_VGA 0x0166 static const struct pci_dev_reset_methods pci_dev_reset_methods[] = { { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82599_SFP_VF, reset_intel_82599_sfp_virtfn }, + { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IVB_M_VGA, + reset_ivb_igd }, + { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IVB_M2_VGA, + reset_ivb_igd }, { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, reset_intel_generic_dev }, { 0 } }; +/* + * These device-specific reset methods are here rather than in a driver + * because when a host assigns a device to a guest VM, the host may need + * to reset the device but probably doesn't have a driver for it. + */ int pci_dev_specific_reset(struct pci_dev *dev, int probe) { const struct pci_dev_reset_methods *i; diff --git a/include/asm-generic/pci-bridge.h b/include/asm-generic/pci-bridge.h index a5b5d5a89a4f..20db2e5a0a69 100644 --- a/include/asm-generic/pci-bridge.h +++ b/include/asm-generic/pci-bridge.h @@ -30,6 +30,12 @@ enum { PCI_ENABLE_PROC_DOMAINS = 0x00000010, /* ... except for domain 0 */ PCI_COMPAT_DOMAIN_0 = 0x00000020, + + /* PCIe downstream ports are bridges that normally lead to only a + * device 0, but if this is set, we scan all possible devices, not + * just device 0. + */ + PCI_SCAN_ALL_PCIE_DEVS = 0x00000040, }; #ifdef CONFIG_PCI diff --git a/include/linux/ioport.h b/include/linux/ioport.h index e885ba23de70..589e0e75efae 100644 --- a/include/linux/ioport.h +++ b/include/linux/ioport.h @@ -223,5 +223,12 @@ extern int walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages, void *arg, int (*func)(unsigned long, unsigned long, void *)); +/* True if any part of r1 overlaps r2 */ +static inline bool resource_overlaps(struct resource *r1, struct resource *r2) +{ + return (r1->start <= r2->end && r1->end >= r2->start); +} + + #endif /* __ASSEMBLY__ */ #endif /* _LINUX_IOPORT_H */ diff --git a/include/linux/pci.h b/include/linux/pci.h index e444f5b49118..17b7b5b01b4a 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -375,11 +375,18 @@ struct pci_host_bridge_window { }; struct pci_host_bridge { - struct list_head list; + struct device dev; struct pci_bus *bus; /* root bus */ struct list_head windows; /* pci_host_bridge_windows */ + void (*release_fn)(struct pci_host_bridge *); + void *release_data; }; +#define to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev) +void pci_set_host_bridge_release(struct pci_host_bridge *bridge, + void (*release_fn)(struct pci_host_bridge *), + void *release_data); + /* * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond * to P2P or CardBus bridge windows) go in a table. Additional ones (for |