Commit 07ae95f9 authored by Andrew Patterson's avatar Andrew Patterson Committed by Jesse Barnes
Browse files

ACPI/PCI: PCI MSI _OSC support capabilities called when root bridge added 



The _OSC capability OSC_MSI_SUPPORT is set when the root bridge is added
with pci_acpi_osc_support(), so we no longer need to do it in the PCI
MSI driver.  Also adds the function pci_msi_enabled, which returns true
if pci=nomsi 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 eb9188bd

drivers/acpi/pci_root.c

+2 −0
Original line number Diff line number Diff line
@@ -350,6 +350,8 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device) 
	if (pcie_aspm_enabled())

		flags |= OSC_ACTIVE_STATE_PWR_SUPPORT |

			OSC_CLOCK_PWR_CAPABILITY_SUPPORT;

	if (pci_msi_enabled())

		flags |= OSC_MSI_SUPPORT;

	if (flags != base_flags)

		pci_acpi_osc_support(device->handle, flags);

drivers/pci/msi.c

+11 −20
Original line number Diff line number Diff line
@@ -776,28 +776,19 @@ void pci_no_msi(void) 
	pci_msi_enable = 0;

}



void pci_msi_init_pci_dev(struct pci_dev *dev)

{

	INIT_LIST_HEAD(&dev->msi_list);

}



#ifdef CONFIG_ACPI

#include <linux/acpi.h>

#include <linux/pci-acpi.h>

static void __devinit msi_acpi_init(void)

/**

 * pci_msi_enabled - is MSI enabled?

 *

 * Returns true if MSI has not been disabled by the command-line option

 * pci=nomsi.

 **/

int pci_msi_enabled(void)

{

	if (acpi_pci_disabled)

		return;

	pci_osc_support_set(OSC_MSI_SUPPORT);

	pcie_osc_support_set(OSC_MSI_SUPPORT);

	return pci_msi_enable;

}

#else

static inline void msi_acpi_init(void) { }

#endif /* CONFIG_ACPI */

EXPORT_SYMBOL(pci_msi_enabled);



void __devinit msi_init(void)

void pci_msi_init_pci_dev(struct pci_dev *dev)

{

	if (!pci_msi_enable)

		return;

	msi_acpi_init();

	INIT_LIST_HEAD(&dev->msi_list);

}

drivers/pci/pci.c

+0 −2
Original line number Diff line number Diff line
@@ -2105,8 +2105,6 @@ static int __devinit pci_init(void) 
		pci_fixup_device(pci_fixup_final, dev);

	}



	msi_init();



	return 0;

}

drivers/pci/pci.h

+0 −2
Original line number Diff line number Diff line
@@ -102,11 +102,9 @@ extern unsigned int pci_pm_d3_delay; 
#ifdef CONFIG_PCI_MSI

void pci_no_msi(void);

extern void pci_msi_init_pci_dev(struct pci_dev *dev);

extern void __devinit msi_init(void);

#else

static inline void pci_no_msi(void) { }

static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { }

static inline void msi_init(void) { }

#endif



#ifdef CONFIG_PCIEAER

include/linux/pci.h

+5 −0
Original line number Diff line number Diff line
@@ -779,6 +779,10 @@ static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev) 


static inline void pci_restore_msi_state(struct pci_dev *dev)

{ }

static inline int pci_msi_enabled(void)

{

	return 0;

}

#else

extern int pci_enable_msi(struct pci_dev *dev);

extern void pci_msi_shutdown(struct pci_dev *dev);
@@ -789,6 +793,7 @@ extern void pci_msix_shutdown(struct pci_dev *dev); 
extern void pci_disable_msix(struct pci_dev *dev);

extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);

extern void pci_restore_msi_state(struct pci_dev *dev);

extern int pci_msi_enabled(void);

#endif



#ifndef CONFIG_PCIEASPM

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