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authorAndrew Patterson <andrew.patterson@hp.com>2008-11-10 15:30:55 -0700
committerJesse Barnes <jbarnes@virtuousgeek.org>2009-01-07 11:12:29 -0800
commit3e1b16002af29758b6bc9c38939d43838d9335bc (patch)
tree6782f844e3813355280ad3367c58d90d576901f2
parent0ef5f8f6159e44b4faa997be08d1a3bcbf44ad08 (diff)
downloadop-kernel-dev-3e1b16002af29758b6bc9c38939d43838d9335bc.zip
op-kernel-dev-3e1b16002af29758b6bc9c38939d43838d9335bc.tar.gz
ACPI/PCI: PCIe ASPM _OSC support capabilities called when root bridge added
The _OSC capabilities OSC_ACTIVE_STATE_PWR_SUPPORT and OSC_CLOCK_PWR_CAPABILITY_SUPPORT are set when the root bridge is added with pci_acpi_osc_support(), so we no longer need to do it in the ASPM driver. Also add the function pcie_aspm_enabled, which returns true if pcie_aspm=off is not on the kernel command-line. Signed-off-by: Andrew Patterson <andrew.patterson@hp.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
-rw-r--r--drivers/acpi/pci_root.c3
-rw-r--r--drivers/pci/pcie/aspm.c27
-rw-r--r--include/linux/pci.h9
3 files changed, 21 insertions, 18 deletions
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 96e68e8..9fe026b 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -347,6 +347,9 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
/* Indicate support for various _OSC capabilities. */
if (pci_ext_cfg_avail(root->bus->self))
flags |= OSC_EXT_PCI_CONFIG_SUPPORT;
+ if (pcie_aspm_enabled())
+ flags |= OSC_ACTIVE_STATE_PWR_SUPPORT |
+ OSC_CLOCK_PWR_CAPABILITY_SUPPORT;
if (flags != base_flags)
pci_acpi_osc_support(device->handle, flags);
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index 9aad608..e361c7d 100644
--- a/drivers/pci/pcie/aspm.c
+++ b/drivers/pci/pcie/aspm.c
@@ -857,24 +857,15 @@ void pcie_no_aspm(void)
aspm_disabled = 1;
}
-#ifdef CONFIG_ACPI
-#include <acpi/acpi_bus.h>
-#include <linux/pci-acpi.h>
-static void pcie_aspm_platform_init(void)
-{
- pcie_osc_support_set(OSC_ACTIVE_STATE_PWR_SUPPORT|
- OSC_CLOCK_PWR_CAPABILITY_SUPPORT);
-}
-#else
-static inline void pcie_aspm_platform_init(void) { }
-#endif
-
-static int __init pcie_aspm_init(void)
+/**
+ * pcie_aspm_enabled - is PCIe ASPM enabled?
+ *
+ * Returns true if ASPM has not been disabled by the command-line option
+ * pcie_aspm=off.
+ **/
+int pcie_aspm_enabled(void)
{
- if (aspm_disabled)
- return 0;
- pcie_aspm_platform_init();
- return 0;
+ return !aspm_disabled;
}
+EXPORT_SYMBOL(pcie_aspm_enabled);
-fs_initcall(pcie_aspm_init);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 6fd4765..eae97a2 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -791,6 +791,15 @@ extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
extern void pci_restore_msi_state(struct pci_dev *dev);
#endif
+#ifndef CONFIG_PCIEASPM
+static inline int pcie_aspm_enabled(void)
+{
+ return 0;
+}
+#else
+extern int pcie_aspm_enabled(void);
+#endif
+
#ifdef CONFIG_HT_IRQ
/* The functions a driver should call */
int ht_create_irq(struct pci_dev *dev, int idx);
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