Merge tag 'for-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI update from Bjorn Helgaas:
 "Host bridge hotplug:
   - Untangle _PRT from struct pci_bus (Bjorn Helgaas)
   - Request _OSC control before scanning root bus (Taku Izumi)
   - Assign resources when adding host bridge (Yinghai Lu)
   - Remove root bus when removing host bridge (Yinghai Lu)
   - Remove _PRT during hot remove (Yinghai Lu)

  SRIOV
    - Add sysfs knobs to control numVFs (Don Dutile)

  Power management
   - Notify devices when power resource turned on (Huang Ying)

  Bug fixes
   - Work around broken _SEG on HP xw9300 (Bjorn Helgaas)
   - Keep runtime PM enabled for unbound PCI devices (Huang Ying)
   - Fix Optimus dual-GPU runtime D3 suspend issue (Dave Airlie)
   - Fix xen frontend shutdown issue (David Vrabel)
   - Work around PLX PCI 9050 BAR alignment erratum (Ian Abbott)

  Miscellaneous
   - Add GPL license for drivers/pci/ioapic (Andrew Cooks)
   - Add standard PCI-X, PCIe ASPM register #defines (Bjorn Helgaas)
   - NumaChip remote PCI support (Daniel Blueman)
   - Fix PCIe Link Capabilities Supported Link Speed definition (Jingoo
     Han)
   - Convert dev_printk() to dev_info(), etc (Joe Perches)
   - Add support for non PCI BAR ROM data (Matthew Garrett)
   - Add x86 support for host bridge translation offset (Mike Yoknis)
   - Report success only when every driver supports AER (Vijay
     Pandarathil)"

Fix up trivial conflicts.

* tag 'for-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (48 commits)
  PCI: Use phys_addr_t for physical ROM address
  x86/PCI: Add NumaChip remote PCI support
  ath9k: Use standard #defines for PCIe Capability ASPM fields
  iwlwifi: Use standard #defines for PCIe Capability ASPM fields
  iwlwifi: collapse wrapper for pcie_capability_read_word()
  iwlegacy: Use standard #defines for PCIe Capability ASPM fields
  iwlegacy: collapse wrapper for pcie_capability_read_word()
  cxgb3: Use standard #defines for PCIe Capability ASPM fields
  PCI: Add standard PCIe Capability Link ASPM field names
  PCI/portdrv: Use PCI Express Capability accessors
  PCI: Use standard PCIe Capability Link register field names
  x86: Use PCI setup data
  PCI: Add support for non-BAR ROMs
  PCI: Add pcibios_add_device
  EFI: Stash ROMs if they're not in the PCI BAR
  PCI: Add and use standard PCI-X Capability register names
  PCI/PM: Keep runtime PM enabled for unbound PCI devices
  xen-pcifront: Handle backend CLOSED without CLOSING
  PCI: SRIOV control and status via sysfs (documentation)
  PCI/AER: Report success only when every device has AER-aware driver
  ...

3 files changed, 110 insertions, 84 deletions

diff --git a/drivers/acpi/pci_bind.c b/drivers/acpi/pci_bind.c
index 2ef04098cc1d..a1dee29beed3 100644
--- a/drivers/acpi/pci_bind.c
+++ b/drivers/acpi/pci_bind.c
@@ -45,11 +45,12 @@ static int acpi_pci_unbind(struct acpi_device *device)
 
         device_set_run_wake(&dev->dev, false);
         pci_acpi_remove_pm_notifier(device);
+        acpi_power_resource_unregister_device(&dev->dev, device->handle);
 
         if (!dev->subordinate)
                 goto out;
 
-        acpi_pci_irq_del_prt(dev->subordinate);
+        acpi_pci_irq_del_prt(pci_domain_nr(dev->bus), dev->subordinate->number);
 
         device->ops.bind = NULL;
         device->ops.unbind = NULL;
@@ -63,7 +64,7 @@ static int acpi_pci_bind(struct acpi_device *device)
 {
         acpi_status status;
         acpi_handle handle;
-        struct pci_bus *bus;
+        unsigned char bus;
         struct pci_dev *dev;
 
         dev = acpi_get_pci_dev(device->handle);
@@ -71,6 +72,7 @@ static int acpi_pci_bind(struct acpi_device *device)
                 return 0;
 
         pci_acpi_add_pm_notifier(device, dev);
+        acpi_power_resource_register_device(&dev->dev, device->handle);
         if (device->wakeup.flags.run_wake)
                 device_set_run_wake(&dev->dev, true);
 
@@ -100,11 +102,11 @@ static int acpi_pci_bind(struct acpi_device *device)
                 goto out;
 
         if (dev->subordinate)
-                bus = dev->subordinate;
+                bus = dev->subordinate->number;
         else
-                bus = dev->bus;
+                bus = dev->bus->number;
 
-        acpi_pci_irq_add_prt(device->handle, bus);
+        acpi_pci_irq_add_prt(device->handle, pci_domain_nr(dev->bus), bus);
 
 out:
         pci_dev_put(dev);
diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index 23a032490130..68a921d03247 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -184,7 +184,7 @@ static void do_prt_fixups(struct acpi_prt_entry *entry,
         }
 }
 
-static int acpi_pci_irq_add_entry(acpi_handle handle, struct pci_bus *bus,
+static int acpi_pci_irq_add_entry(acpi_handle handle, int segment, int bus,
                                   struct acpi_pci_routing_table *prt)
 {
         struct acpi_prt_entry *entry;
@@ -198,8 +198,8 @@ static int acpi_pci_irq_add_entry(acpi_handle handle, struct pci_bus *bus,
          * 1=INTA, 2=INTB.  We use the PCI encoding throughout, so convert
          * it here.
          */
-        entry->id.segment = pci_domain_nr(bus);
-        entry->id.bus = bus->number;
+        entry->id.segment = segment;
+        entry->id.bus = bus;
         entry->id.device = (prt->address >> 16) & 0xFFFF;
         entry->pin = prt->pin + 1;
 
@@ -244,7 +244,7 @@ static int acpi_pci_irq_add_entry(acpi_handle handle, struct pci_bus *bus,
         return 0;
 }
 
-int acpi_pci_irq_add_prt(acpi_handle handle, struct pci_bus *bus)
+int acpi_pci_irq_add_prt(acpi_handle handle, int segment, int bus)
 {
         acpi_status status;
         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
@@ -273,7 +273,7 @@ int acpi_pci_irq_add_prt(acpi_handle handle, struct pci_bus *bus)
 
         entry = buffer.pointer;
         while (entry && (entry->length > 0)) {
-                acpi_pci_irq_add_entry(handle, bus, entry);
+                acpi_pci_irq_add_entry(handle, segment, bus, entry);
                 entry = (struct acpi_pci_routing_table *)
                     ((unsigned long)entry + entry->length);
         }
@@ -282,17 +282,16 @@ int acpi_pci_irq_add_prt(acpi_handle handle, struct pci_bus *bus)
         return 0;
 }
 
-void acpi_pci_irq_del_prt(struct pci_bus *bus)
+void acpi_pci_irq_del_prt(int segment, int bus)
 {
         struct acpi_prt_entry *entry, *tmp;
 
         printk(KERN_DEBUG
                "ACPI: Delete PCI Interrupt Routing Table for %04x:%02x\n",
-               pci_domain_nr(bus), bus->number);
+               segment, bus);
         spin_lock(&acpi_prt_lock);
         list_for_each_entry_safe(entry, tmp, &acpi_prt_list, list) {
-                if (pci_domain_nr(bus) == entry->id.segment
-                        && bus->number == entry->id.bus) {
+                if (segment == entry->id.segment && bus == entry->id.bus) {
                         list_del(&entry->list);
                         kfree(entry);
                 }
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index f70b9e5fc1b5..7928d4dc7056 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -454,6 +454,7 @@ static int acpi_pci_root_add(struct acpi_device *device)
         acpi_handle handle;
         struct acpi_device *child;
         u32 flags, base_flags;
+        bool is_osc_granted = false;
 
         root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL);
         if (!root)
@@ -501,85 +502,47 @@ static int acpi_pci_root_add(struct acpi_device *device)
         strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS);
         device->driver_data = root;
 
-        root->mcfg_addr = acpi_pci_root_get_mcfg_addr(device->handle);
-
-        /*
-         * All supported architectures that use ACPI have support for
-         * PCI domains, so we indicate this in _OSC support capabilities.
-         */
-        flags = base_flags = OSC_PCI_SEGMENT_GROUPS_SUPPORT;
-        acpi_pci_osc_support(root, flags);
-
-        /*
-         * TBD: Need PCI interface for enumeration/configuration of roots.
-         */
-
-        mutex_lock(&acpi_pci_root_lock);
-        list_add_tail(&root->node, &acpi_pci_roots);
-        mutex_unlock(&acpi_pci_root_lock);
-
         printk(KERN_INFO PREFIX "%s [%s] (domain %04x %pR)\n",
                acpi_device_name(device), acpi_device_bid(device),
                root->segment, &root->secondary);
 
         /*
-         * Scan the Root Bridge
-         * --------------------
-         * Must do this prior to any attempt to bind the root device, as the
-         * PCI namespace does not get created until this call is made (and 
-         * thus the root bridge's pci_dev does not exist).
-         */
-        root->bus = pci_acpi_scan_root(root);
-        if (!root->bus) {
-                printk(KERN_ERR PREFIX
-                            "Bus %04x:%02x not present in PCI namespace\n",
-                            root->segment, (unsigned int)root->secondary.start);
-                result = -ENODEV;
-                goto out_del_root;
-        }
-
-        /*
-         * Attach ACPI-PCI Context
-         * -----------------------
-         * Thus binding the ACPI and PCI devices.
-         */
-        result = acpi_pci_bind_root(device);
-        if (result)
-                goto out_del_root;
-
-        /*
          * PCI Routing Table
          * -----------------
          * Evaluate and parse _PRT, if exists.
          */
         status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
         if (ACPI_SUCCESS(status))
-                result = acpi_pci_irq_add_prt(device->handle, root->bus);
+                result = acpi_pci_irq_add_prt(device->handle, root->segment,
+                                              root->secondary.start);
+
+        root->mcfg_addr = acpi_pci_root_get_mcfg_addr(device->handle);
 
         /*
-         * Scan and bind all _ADR-Based Devices
+         * All supported architectures that use ACPI have support for
+         * PCI domains, so we indicate this in _OSC support capabilities.
          */
-        list_for_each_entry(child, &device->children, node)
-                acpi_pci_bridge_scan(child);
+        flags = base_flags = OSC_PCI_SEGMENT_GROUPS_SUPPORT;
+        acpi_pci_osc_support(root, flags);
 
         /* Indicate support for various _OSC capabilities. */
-        if (pci_ext_cfg_avail(root->bus->self))
+        if (pci_ext_cfg_avail())
                 flags |= OSC_EXT_PCI_CONFIG_SUPPORT;
-        if (pcie_aspm_support_enabled())
+        if (pcie_aspm_support_enabled()) {
                 flags |= OSC_ACTIVE_STATE_PWR_SUPPORT |
-                        OSC_CLOCK_PWR_CAPABILITY_SUPPORT;
+                OSC_CLOCK_PWR_CAPABILITY_SUPPORT;
+        }
         if (pci_msi_enabled())
                 flags |= OSC_MSI_SUPPORT;
         if (flags != base_flags) {
                 status = acpi_pci_osc_support(root, flags);
                 if (ACPI_FAILURE(status)) {
-                        dev_info(root->bus->bridge, "ACPI _OSC support "
+                        dev_info(&device->dev, "ACPI _OSC support "
                                 "notification failed, disabling PCIe ASPM\n");
                         pcie_no_aspm();
                         flags = base_flags;
                 }
         }
-
         if (!pcie_ports_disabled
             && (flags & ACPI_PCIE_REQ_SUPPORT) == ACPI_PCIE_REQ_SUPPORT) {
                 flags = OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL
@@ -588,40 +551,81 @@ static int acpi_pci_root_add(struct acpi_device *device)
 
                 if (pci_aer_available()) {
                         if (aer_acpi_firmware_first())
-                                dev_dbg(root->bus->bridge,
+                                dev_dbg(&device->dev,
                                         "PCIe errors handled by BIOS.\n");
                         else
                                 flags |= OSC_PCI_EXPRESS_AER_CONTROL;
                 }
 
-                dev_info(root->bus->bridge,
+                dev_info(&device->dev,
                         "Requesting ACPI _OSC control (0x%02x)\n", flags);
 
                 status = acpi_pci_osc_control_set(device->handle, &flags,
-                                        OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
+                                       OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
                 if (ACPI_SUCCESS(status)) {
-                        dev_info(root->bus->bridge,
+                        is_osc_granted = true;
+                        dev_info(&device->dev,
                                 "ACPI _OSC control (0x%02x) granted\n", flags);
-                        if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) {
-                                /*
-                                 * We have ASPM control, but the FADT indicates
-                                 * that it's unsupported. Clear it.
-                                 */
-                                pcie_clear_aspm(root->bus);
-                        }
                 } else {
-                        dev_info(root->bus->bridge,
+                        is_osc_granted = false;
+                        dev_info(&device->dev,
                                 "ACPI _OSC request failed (%s), "
                                 "returned control mask: 0x%02x\n",
                                 acpi_format_exception(status), flags);
-                        pr_info("ACPI _OSC control for PCIe not granted, "
-                                "disabling ASPM\n");
-                        pcie_no_aspm();
                 }
         } else {
-                dev_info(root->bus->bridge,
-                         "Unable to request _OSC control "
-                         "(_OSC support mask: 0x%02x)\n", flags);
+                dev_info(&device->dev,
+                        "Unable to request _OSC control "
+                        "(_OSC support mask: 0x%02x)\n", flags);
+        }
+
+        /*
+         * TBD: Need PCI interface for enumeration/configuration of roots.
+         */
+
+        mutex_lock(&acpi_pci_root_lock);
+        list_add_tail(&root->node, &acpi_pci_roots);
+        mutex_unlock(&acpi_pci_root_lock);
+
+        /*
+         * Scan the Root Bridge
+         * --------------------
+         * Must do this prior to any attempt to bind the root device, as the
+         * PCI namespace does not get created until this call is made (and 
+         * thus the root bridge's pci_dev does not exist).
+         */
+        root->bus = pci_acpi_scan_root(root);
+        if (!root->bus) {
+                printk(KERN_ERR PREFIX
+                            "Bus %04x:%02x not present in PCI namespace\n",
+                            root->segment, (unsigned int)root->secondary.start);
+                result = -ENODEV;
+                goto out_del_root;
+        }
+
+        /*
+         * Attach ACPI-PCI Context
+         * -----------------------
+         * Thus binding the ACPI and PCI devices.
+         */
+        result = acpi_pci_bind_root(device);
+        if (result)
+                goto out_del_root;
+
+        /*
+         * Scan and bind all _ADR-Based Devices
+         */
+        list_for_each_entry(child, &device->children, node)
+                acpi_pci_bridge_scan(child);
+
+        /* ASPM setting */
+        if (is_osc_granted) {
+                if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM)
+                        pcie_clear_aspm(root->bus);
+        } else {
+                pr_info("ACPI _OSC control for PCIe not granted, "
+                        "disabling ASPM\n");
+                pcie_no_aspm();
         }
 
         pci_acpi_add_bus_pm_notifier(device, root->bus);
@@ -634,6 +638,8 @@ out_del_root:
         mutex_lock(&acpi_pci_root_lock);
         list_del(&root->node);
         mutex_unlock(&acpi_pci_root_lock);
+
+        acpi_pci_irq_del_prt(root->segment, root->secondary.start);
 end:
         kfree(root);
         return result;
@@ -644,12 +650,19 @@ static int acpi_pci_root_start(struct acpi_device *device)
         struct acpi_pci_root *root = acpi_driver_data(device);
         struct acpi_pci_driver *driver;
 
+        if (system_state != SYSTEM_BOOTING)
+                pci_assign_unassigned_bus_resources(root->bus);
+
         mutex_lock(&acpi_pci_root_lock);
         list_for_each_entry(driver, &acpi_pci_drivers, node)
                 if (driver->add)
                         driver->add(root);
         mutex_unlock(&acpi_pci_root_lock);
 
+        /* need to after hot-added ioapic is registered */
+        if (system_state != SYSTEM_BOOTING)
+                pci_enable_bridges(root->bus);
+
         pci_bus_add_devices(root->bus);
 
         return 0;
@@ -657,17 +670,29 @@ static int acpi_pci_root_start(struct acpi_device *device)
 
 static int acpi_pci_root_remove(struct acpi_device *device, int type)
 {
+        acpi_status status;
+        acpi_handle handle;
         struct acpi_pci_root *root = acpi_driver_data(device);
         struct acpi_pci_driver *driver;
 
+        pci_stop_root_bus(root->bus);
+
         mutex_lock(&acpi_pci_root_lock);
-        list_for_each_entry(driver, &acpi_pci_drivers, node)
+        list_for_each_entry_reverse(driver, &acpi_pci_drivers, node)
                 if (driver->remove)
                         driver->remove(root);
+        mutex_unlock(&acpi_pci_root_lock);
 
         device_set_run_wake(root->bus->bridge, false);
         pci_acpi_remove_bus_pm_notifier(device);
 
+        status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
+        if (ACPI_SUCCESS(status))
+                acpi_pci_irq_del_prt(root->segment, root->secondary.start);
+
+        pci_remove_root_bus(root->bus);
+
+        mutex_lock(&acpi_pci_root_lock);
         list_del(&root->node);
         mutex_unlock(&acpi_pci_root_lock);
         kfree(root);