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Merge branch 'pci/misc' into next

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* pci/misc:
  PCI/ACPI: Fix _OSC ordering to allow PCIe hotplug use when available
  PCI: exynos: Add I/O access wrappers
  PCI: designware: Drop "addr" arg from dw_pcie_readl_rc()/dw_pcie_writel_rc()
This commit is contained in:
Bjorn Helgaas
2013-08-29 17:23:33 -06:00
parent 2e8b5f621d 3dc48af310
commit e89c33168a
3 changed files with 183 additions and 172 deletions
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drivers/acpi/pci_root.c
+38 -24
View File
@@ -378,6 +378,7 @@ static int acpi_pci_root_add(struct acpi_device *device,
struct acpi_pci_root *root;
u32 flags, base_flags;
acpi_handle handle = device->handle;
bool no_aspm = false, clear_aspm = false;
root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL);
if (!root)
@@ -437,27 +438,6 @@ 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.
*/
/*
* 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) {
dev_err(&device->dev,
"Bus %04x:%02x not present in PCI namespace\n",
root->segment, (unsigned int)root->secondary.start);
result = -ENODEV;
goto end;
}
/* Indicate support for various _OSC capabilities. */
if (pci_ext_cfg_avail())
flags |= OSC_EXT_PCI_CONFIG_SUPPORT;
if (pcie_aspm_support_enabled()) {
@@ -471,7 +451,7 @@ static int acpi_pci_root_add(struct acpi_device *device,
if (ACPI_FAILURE(status)) {
dev_info(&device->dev, "ACPI _OSC support "
"notification failed, disabling PCIe ASPM\n");
pcie_no_aspm();
no_aspm = true;
flags = base_flags;
}
}
@@ -503,7 +483,7 @@ static int acpi_pci_root_add(struct acpi_device *device,
* We have ASPM control, but the FADT indicates
* that it's unsupported. Clear it.
*/
pcie_clear_aspm(root->bus);
clear_aspm = true;
}
} else {
dev_info(&device->dev,
@@ -512,7 +492,14 @@ static int acpi_pci_root_add(struct acpi_device *device,
acpi_format_exception(status), flags);
dev_info(&device->dev,
"ACPI _OSC control for PCIe not granted, disabling ASPM\n");
pcie_no_aspm();
/*
* We want to disable ASPM here, but aspm_disabled
* needs to remain in its state from boot so that we
* properly handle PCIe 1.1 devices. So we set this
* flag here, to defer the action until after the ACPI
* root scan.
*/
no_aspm = true;
}
} else {
dev_info(&device->dev,
@@ -520,6 +507,33 @@ static int acpi_pci_root_add(struct acpi_device *device,
"(_OSC support mask: 0x%02x)\n", flags);
}
/*
* TBD: Need PCI interface for enumeration/configuration of roots.
*/
/*
* 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) {
dev_err(&device->dev,
"Bus %04x:%02x not present in PCI namespace\n",
root->segment, (unsigned int)root->secondary.start);
result = -ENODEV;
goto end;
}
if (clear_aspm) {
dev_info(&device->dev, "Disabling ASPM (FADT indicates it is unsupported)\n");
pcie_clear_aspm(root->bus);
}
if (no_aspm)
pcie_no_aspm();
pci_acpi_add_bus_pm_notifier(device, root->bus);
if (device->wakeup.flags.run_wake)
device_set_run_wake(root->bus->bridge, true);