Commit 3e1b1600 authored by Andrew Patterson's avatar Andrew Patterson Committed by Jesse Barnes
Browse files

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: default avatarAndrew Patterson <andrew.patterson@hp.com>
Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
parent 0ef5f8f6

drivers/acpi/pci_root.c

+3 −0
Original line number Diff line number Diff line
@@ -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);

drivers/pci/pcie/aspm.c

+9 −18
Original line number Diff line number Diff line
@@ -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);

include/linux/pci.h

+9 −0
Original line number Diff line number Diff line
@@ -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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