#include <linux/init.h>
#include <linux/irq.h>
#include <linux/dmi.h>
+#include <linux/slab.h>
#include <asm/numa.h>
-#include "pci.h"
+#include <asm/pci_x86.h>
-static int __devinit can_skip_ioresource_align(const struct dmi_system_id *d)
+struct pci_root_info {
+ struct acpi_device *bridge;
+ char *name;
+ unsigned int res_num;
+ struct resource *res;
+ struct pci_bus *bus;
+ int busnum;
+};
+
+static bool pci_use_crs = true;
+
+static int __init set_use_crs(const struct dmi_system_id *id)
{
- pci_probe |= PCI_CAN_SKIP_ISA_ALIGN;
- printk(KERN_INFO "PCI: %s detected, can skip ISA alignment\n", d->ident);
+ pci_use_crs = true;
return 0;
}
-static struct dmi_system_id acpi_pciprobe_dmi_table[] __devinitdata = {
-/*
- * Systems where PCI IO resource ISA alignment can be skipped
- * when the ISA enable bit in the bridge control is not set
- */
+static const struct dmi_system_id pci_use_crs_table[] __initconst = {
+ /* http://bugzilla.kernel.org/show_bug.cgi?id=14183 */
{
- .callback = can_skip_ioresource_align,
+ .callback = set_use_crs,
.ident = "IBM System x3800",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
},
},
+ /* https://bugzilla.kernel.org/show_bug.cgi?id=16007 */
+ /* 2006 AMD HT/VIA system with two host bridges */
+ {
+ .callback = set_use_crs,
+ .ident = "ASRock ALiveSATA2-GLAN",
+ .matches = {
+ DMI_MATCH(DMI_PRODUCT_NAME, "ALiveSATA2-GLAN"),
+ },
+ },
+ /* https://bugzilla.kernel.org/show_bug.cgi?id=30552 */
+ /* 2006 AMD HT/VIA system with two host bridges */
{
- .callback = can_skip_ioresource_align,
- .ident = "IBM System x3850",
+ .callback = set_use_crs,
+ .ident = "ASUS M2V-MX SE",
.matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
- DMI_MATCH(DMI_PRODUCT_NAME, "x3850"),
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+ DMI_MATCH(DMI_BOARD_NAME, "M2V-MX SE"),
+ DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
},
},
+ /* https://bugzilla.kernel.org/show_bug.cgi?id=42619 */
{
- .callback = can_skip_ioresource_align,
- .ident = "IBM System x3950",
+ .callback = set_use_crs,
+ .ident = "MSI MS-7253",
.matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
- DMI_MATCH(DMI_PRODUCT_NAME, "x3950"),
+ DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
+ DMI_MATCH(DMI_BOARD_NAME, "MS-7253"),
+ DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"),
},
},
{}
};
-struct pci_root_info {
- char *name;
- unsigned int res_num;
- struct resource *res;
- struct pci_bus *bus;
- int busnum;
-};
+void __init pci_acpi_crs_quirks(void)
+{
+ int year;
+
+ if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008)
+ pci_use_crs = false;
+
+ dmi_check_system(pci_use_crs_table);
+
+ /*
+ * If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that
+ * takes precedence over anything we figured out above.
+ */
+ if (pci_probe & PCI_ROOT_NO_CRS)
+ pci_use_crs = false;
+ else if (pci_probe & PCI_USE__CRS)
+ pci_use_crs = true;
+
+ printk(KERN_INFO "PCI: %s host bridge windows from ACPI; "
+ "if necessary, use \"pci=%s\" and report a bug\n",
+ pci_use_crs ? "Using" : "Ignoring",
+ pci_use_crs ? "nocrs" : "use_crs");
+}
static acpi_status
resource_to_addr(struct acpi_resource *resource,
struct acpi_resource_address64 *addr)
{
acpi_status status;
-
- status = acpi_resource_to_address64(resource, addr);
- if (ACPI_SUCCESS(status) &&
- (addr->resource_type == ACPI_MEMORY_RANGE ||
- addr->resource_type == ACPI_IO_RANGE) &&
- addr->address_length > 0 &&
- addr->producer_consumer == ACPI_PRODUCER) {
+ struct acpi_resource_memory24 *memory24;
+ struct acpi_resource_memory32 *memory32;
+ struct acpi_resource_fixed_memory32 *fixed_memory32;
+
+ memset(addr, 0, sizeof(*addr));
+ switch (resource->type) {
+ case ACPI_RESOURCE_TYPE_MEMORY24:
+ memory24 = &resource->data.memory24;
+ addr->resource_type = ACPI_MEMORY_RANGE;
+ addr->minimum = memory24->minimum;
+ addr->address_length = memory24->address_length;
+ addr->maximum = addr->minimum + addr->address_length - 1;
+ return AE_OK;
+ case ACPI_RESOURCE_TYPE_MEMORY32:
+ memory32 = &resource->data.memory32;
+ addr->resource_type = ACPI_MEMORY_RANGE;
+ addr->minimum = memory32->minimum;
+ addr->address_length = memory32->address_length;
+ addr->maximum = addr->minimum + addr->address_length - 1;
return AE_OK;
+ case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
+ fixed_memory32 = &resource->data.fixed_memory32;
+ addr->resource_type = ACPI_MEMORY_RANGE;
+ addr->minimum = fixed_memory32->address;
+ addr->address_length = fixed_memory32->address_length;
+ addr->maximum = addr->minimum + addr->address_length - 1;
+ return AE_OK;
+ case ACPI_RESOURCE_TYPE_ADDRESS16:
+ case ACPI_RESOURCE_TYPE_ADDRESS32:
+ case ACPI_RESOURCE_TYPE_ADDRESS64:
+ status = acpi_resource_to_address64(resource, addr);
+ if (ACPI_SUCCESS(status) &&
+ (addr->resource_type == ACPI_MEMORY_RANGE ||
+ addr->resource_type == ACPI_IO_RANGE) &&
+ addr->address_length > 0) {
+ return AE_OK;
+ }
+ break;
}
return AE_ERROR;
}
struct acpi_resource_address64 addr;
acpi_status status;
- if (info->res_num >= PCI_BUS_NUM_RESOURCES)
- return AE_OK;
-
status = resource_to_addr(acpi_res, &addr);
if (ACPI_SUCCESS(status))
info->res_num++;
struct acpi_resource_address64 addr;
acpi_status status;
unsigned long flags;
- struct resource *root;
-
- if (info->res_num >= PCI_BUS_NUM_RESOURCES)
- return AE_OK;
+ u64 start, orig_end, end;
status = resource_to_addr(acpi_res, &addr);
if (!ACPI_SUCCESS(status))
return AE_OK;
if (addr.resource_type == ACPI_MEMORY_RANGE) {
- root = &iomem_resource;
flags = IORESOURCE_MEM;
if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
flags |= IORESOURCE_PREFETCH;
} else if (addr.resource_type == ACPI_IO_RANGE) {
- root = &ioport_resource;
flags = IORESOURCE_IO;
} else
return AE_OK;
+ start = addr.minimum + addr.translation_offset;
+ orig_end = end = addr.maximum + addr.translation_offset;
+
+ /* Exclude non-addressable range or non-addressable portion of range */
+ end = min(end, (u64)iomem_resource.end);
+ if (end <= start) {
+ dev_info(&info->bridge->dev,
+ "host bridge window [%#llx-%#llx] "
+ "(ignored, not CPU addressable)\n", start, orig_end);
+ return AE_OK;
+ } else if (orig_end != end) {
+ dev_info(&info->bridge->dev,
+ "host bridge window [%#llx-%#llx] "
+ "([%#llx-%#llx] ignored, not CPU addressable)\n",
+ start, orig_end, end + 1, orig_end);
+ }
+
res = &info->res[info->res_num];
res->name = info->name;
res->flags = flags;
- res->start = addr.minimum + addr.translation_offset;
- res->end = res->start + addr.address_length - 1;
+ res->start = start;
+ res->end = end;
res->child = NULL;
- if (insert_resource(root, res)) {
- printk(KERN_ERR "PCI: Failed to allocate 0x%lx-0x%lx "
- "from %s for %s\n", (unsigned long) res->start,
- (unsigned long) res->end, root->name, info->name);
- } else {
- info->bus->resource[info->res_num] = res;
- info->res_num++;
+ if (!pci_use_crs) {
+ dev_printk(KERN_DEBUG, &info->bridge->dev,
+ "host bridge window %pR (ignored)\n", res);
+ return AE_OK;
}
+
+ info->res_num++;
+ if (addr.translation_offset)
+ dev_info(&info->bridge->dev, "host bridge window %pR "
+ "(PCI address [%#llx-%#llx])\n",
+ res, res->start - addr.translation_offset,
+ res->end - addr.translation_offset);
+ else
+ dev_info(&info->bridge->dev, "host bridge window %pR\n", res);
+
return AE_OK;
}
-static void
-adjust_transparent_bridge_resources(struct pci_bus *bus)
+static bool resource_contains(struct resource *res, resource_size_t point)
{
- struct pci_dev *dev;
-
- list_for_each_entry(dev, &bus->devices, bus_list) {
- int i;
- u16 class = dev->class >> 8;
+ if (res->start <= point && point <= res->end)
+ return true;
+ return false;
+}
- if (class == PCI_CLASS_BRIDGE_PCI && dev->transparent) {
- for(i = 3; i < PCI_BUS_NUM_RESOURCES; i++)
- dev->subordinate->resource[i] =
- dev->bus->resource[i - 3];
+static void coalesce_windows(struct pci_root_info *info, unsigned long type)
+{
+ int i, j;
+ struct resource *res1, *res2;
+
+ for (i = 0; i < info->res_num; i++) {
+ res1 = &info->res[i];
+ if (!(res1->flags & type))
+ continue;
+
+ for (j = i + 1; j < info->res_num; j++) {
+ res2 = &info->res[j];
+ if (!(res2->flags & type))
+ continue;
+
+ /*
+ * I don't like throwing away windows because then
+ * 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)) {
+ res1->start = min(res1->start, res2->start);
+ res1->end = max(res1->end, res2->end);
+ dev_info(&info->bridge->dev,
+ "host bridge window expanded to %pR; %pR ignored\n",
+ res1, res2);
+ res2->flags = 0;
+ }
}
}
}
+static void add_resources(struct pci_root_info *info)
+{
+ int i;
+ struct resource *res, *root, *conflict;
+
+ if (!pci_use_crs)
+ return;
+
+ coalesce_windows(info, IORESOURCE_MEM);
+ coalesce_windows(info, IORESOURCE_IO);
+
+ for (i = 0; i < info->res_num; i++) {
+ res = &info->res[i];
+
+ if (res->flags & IORESOURCE_MEM)
+ root = &iomem_resource;
+ else if (res->flags & IORESOURCE_IO)
+ root = &ioport_resource;
+ else
+ continue;
+
+ conflict = insert_resource_conflict(root, res);
+ if (conflict)
+ dev_info(&info->bridge->dev,
+ "ignoring host bridge window %pR (conflicts with %s %pR)\n",
+ res, conflict->name, conflict);
+ else
+ pci_bus_add_resource(info->bus, res, 0);
+ }
+}
+
static void
get_current_resources(struct acpi_device *device, int busnum,
int domain, struct pci_bus *bus)
struct pci_root_info info;
size_t size;
+ if (pci_use_crs)
+ pci_bus_remove_resources(bus);
+
+ info.bridge = device;
info.bus = bus;
info.res_num = 0;
acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
if (!info.res)
goto res_alloc_fail;
- info.name = kmalloc(16, GFP_KERNEL);
+ 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 (info.res_num)
- adjust_transparent_bridge_resources(bus);
+ add_resources(&info);
return;
name_alloc_fail:
return;
}
-struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int domain, int busnum)
+struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root)
{
+ struct acpi_device *device = root->device;
+ int domain = root->segment;
+ int busnum = root->secondary.start;
struct pci_bus *bus;
struct pci_sysdata *sd;
int node;
int pxm;
#endif
- dmi_check_system(acpi_pciprobe_dmi_table);
-
if (domain && !pci_domains_supported) {
- printk(KERN_WARNING "PCI: Multiple domains not supported "
- "(dom %d, bus %d)\n", domain, busnum);
+ printk(KERN_WARNING "pci_bus %04x:%02x: "
+ "ignored (multiple domains not supported)\n",
+ domain, busnum);
return NULL;
}
if (node != -1)
set_mp_bus_to_node(busnum, node);
else
- node = get_mp_bus_to_node(busnum);
#endif
+ node = get_mp_bus_to_node(busnum);
+
+ 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.
*/
sd = kzalloc(sizeof(*sd), GFP_KERNEL);
if (!sd) {
- printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum);
+ printk(KERN_WARNING "pci_bus %04x:%02x: "
+ "ignored (out of memory)\n", domain, busnum);
return NULL;
}
*/
memcpy(bus->sysdata, sd, sizeof(*sd));
kfree(sd);
- } else
- bus = pci_scan_bus_parented(NULL, busnum, &pci_root_ops, sd);
+ } else {
+ bus = pci_create_bus(NULL, busnum, &pci_root_ops, sd);
+ if (bus) {
+ get_current_resources(device, busnum, domain, bus);
+ bus->subordinate = pci_scan_child_bus(bus);
+ }
+ }
+
+ /* After the PCI-E bus has been walked and all devices discovered,
+ * configure any settings of the fabric that might be necessary.
+ */
+ if (bus) {
+ struct pci_bus *child;
+ list_for_each_entry(child, &bus->children, node) {
+ struct pci_dev *self = child->self;
+ if (!self)
+ continue;
+
+ pcie_bus_configure_settings(child, self->pcie_mpss);
+ }
+ }
if (!bus)
kfree(sd);
+ if (bus && node != -1) {
#ifdef CONFIG_ACPI_NUMA
- if (bus) {
- if (pxm >= 0) {
- printk(KERN_DEBUG "bus %02x -> pxm %d -> node %d\n",
- busnum, pxm, pxm_to_node(pxm));
- }
- }
+ if (pxm >= 0)
+ dev_printk(KERN_DEBUG, &bus->dev,
+ "on NUMA node %d (pxm %d)\n", node, pxm);
+#else
+ dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node);
#endif
+ }
- if (bus && (pci_probe & PCI_USE__CRS))
- get_current_resources(device, busnum, domain, bus);
return bus;
}
-extern int pci_routeirq;
-static int __init pci_acpi_init(void)
+int __init pci_acpi_init(void)
{
struct pci_dev *dev = NULL;
- if (pcibios_scanned)
- return 0;
-
if (acpi_noirq)
- return 0;
+ return -ENODEV;
printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
acpi_irq_penalty_init();
- pcibios_scanned++;
pcibios_enable_irq = acpi_pci_irq_enable;
pcibios_disable_irq = acpi_pci_irq_disable;
+ x86_init.pci.init_irq = x86_init_noop;
if (pci_routeirq) {
/*
acpi_pci_irq_enable(dev);
}
-#ifdef CONFIG_X86_IO_APIC
- if (acpi_ioapic)
- print_IO_APIC();
-#endif
-
return 0;
}
-subsys_initcall(pci_acpi_init);
projects / linux-flexiantxendom0.git / blobdiff