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PCI updates for v3.9:

Browse source 
ASPM
       Revert "PCI/ACPI: Request _OSC control before scanning PCI root bus"
   kexec
       PCI: Don't try to disable Bus Master on disconnected PCI devices
   Platform ROM images
       PCI: Add PCI ROM helper for platform-provided ROM images
       nouveau: Attempt to use platform-provided ROM image
       radeon: Attempt to use platform-provided ROM image
   Hotplug
       PCI/ACPI: Always resume devices on ACPI wakeup notifications
       PCI/PM: Disable runtime PM of PCIe ports
   EISA
       EISA/PCI: Fix bus res reference
       EISA/PCI: Init EISA early, before PNP
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Merge tag 'pci-v3.9-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI fixes from Bjorn Helgaas:
 "PCI updates for v3.9:

  ASPM
      Revert "PCI/ACPI: Request _OSC control before scanning PCI root bus"
  kexec
      PCI: Don't try to disable Bus Master on disconnected PCI devices
  Platform ROM images
      PCI: Add PCI ROM helper for platform-provided ROM images
      nouveau: Attempt to use platform-provided ROM image
      radeon: Attempt to use platform-provided ROM image
  Hotplug
      PCI/ACPI: Always resume devices on ACPI wakeup notifications
      PCI/PM: Disable runtime PM of PCIe ports
  EISA
      EISA/PCI: Fix bus res reference
      EISA/PCI: Init EISA early, before PNP"

* tag 'pci-v3.9-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI/PM: Disable runtime PM of PCIe ports
  PCI/ACPI: Always resume devices on ACPI wakeup notifications
  PCI: Don't try to disable Bus Master on disconnected PCI devices
  Revert "PCI/ACPI: Request _OSC control before scanning PCI root bus"
  radeon: Attempt to use platform-provided ROM image
  nouveau: Attempt to use platform-provided ROM image
  EISA/PCI: Init EISA early, before PNP
  EISA/PCI: Fix bus res reference
  PCI: Add PCI ROM helper for platform-provided ROM images
This commit is contained in:
Linus Torvalds 2013-04-05 19:29:36 -07:00
commit b196553a7f
9 changed files with 169 additions and 118 deletions
Download patch file Download diff file Expand all files Collapse all files

76
drivers/acpi/pci_root.c
View file

@ -415,7 +415,6 @@ static int acpi_pci_root_add(struct acpi_device *device,
struct acpi_pci_root *root;
struct acpi_pci_driver *driver;
u32 flags, base_flags;
bool is_osc_granted = false;
root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL);
if (!root)
@ -476,6 +475,30 @@ static int acpi_pci_root_add(struct acpi_device *device,
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);
/*
* 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;
}
/* Indicate support for various _OSC capabilities. */
if (pci_ext_cfg_avail())
flags |= OSC_EXT_PCI_CONFIG_SUPPORT;
@ -494,6 +517,7 @@ static int acpi_pci_root_add(struct acpi_device *device,
flags = base_flags;
}
}
if (!pcie_ports_disabled
&& (flags & ACPI_PCIE_REQ_SUPPORT) == ACPI_PCIE_REQ_SUPPORT) {
flags = OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL
@ -514,54 +538,28 @@ static int acpi_pci_root_add(struct acpi_device *device,
status = acpi_pci_osc_control_set(device->handle, &flags,
OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
if (ACPI_SUCCESS(status)) {
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 {
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(&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;
}
/* 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();
"Unable to request _OSC control "
"(_OSC support mask: 0x%02x)\n", flags);
}
pci_acpi_add_bus_pm_notifier(device, root->bus);