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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>
hifive-unleashed-5.1
Andrew Patterson 2008-11-10 15:30:55 -07:00 committed by Jesse Barnes
parent 0ef5f8f615
commit 3e1b16002a
3 changed files with 21 additions and 18 deletions
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3
drivers/acpi/pci_root.c
View File

@ -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);

27
drivers/pci/pcie/aspm.c
View File

@ -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_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)
{
pcie_osc_support_set(OSC_ACTIVE_STATE_PWR_SUPPORT|
OSC_CLOCK_PWR_CAPABILITY_SUPPORT);
return !aspm_disabled;
}
#else
static inline void pcie_aspm_platform_init(void) { }
#endif
EXPORT_SYMBOL(pcie_aspm_enabled);
static int __init pcie_aspm_init(void)
{
if (aspm_disabled)
return 0;
pcie_aspm_platform_init();
return 0;
}
fs_initcall(pcie_aspm_init);

9
include/linux/pci.h
View File

@ -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);