aspm.c File Reference

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/pci.h>
#include <linux/pci_regs.h>
#include <linux/errno.h>
#include <linux/pm.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/delay.h>
#include <linux/pci-aspm.h>
#include "../pci.h"

Go to the source code of this file.

Data Structures
struct	aspm_latency
struct	pcie_link_state
struct	aspm_register_info

Macros
#define	MODULE_PARAM_PREFIX   "pcie_aspm."
#define	ASPM_STATE_L0S_UP   (1) /* Upstream direction L0s state */
#define	ASPM_STATE_L0S_DW   (2) /* Downstream direction L0s state */
#define	ASPM_STATE_L1   (4) /* L1 state */
#define	ASPM_STATE_L0S   (ASPM_STATE_L0S_UP | ASPM_STATE_L0S_DW)
#define	ASPM_STATE_ALL   (ASPM_STATE_L0S | ASPM_STATE_L1)
#define	POLICY_DEFAULT   0 /* BIOS default setting */
#define	POLICY_PERFORMANCE   1 /* high performance */
#define	POLICY_POWERSAVE   2 /* high power saving */
#define	LINK_RETRAIN_TIMEOUT   HZ

Functions
void	pcie_aspm_init_link_state (struct pci_dev *pdev)
void	pcie_aspm_exit_link_state (struct pci_dev *pdev)
void	pcie_aspm_pm_state_change (struct pci_dev *pdev)
void	pcie_aspm_powersave_config_link (struct pci_dev *pdev)
void	pci_disable_link_state_locked (struct pci_dev *pdev, int state)
	EXPORT_SYMBOL (pci_disable_link_state_locked)
void	pci_disable_link_state (struct pci_dev *pdev, int state)
	EXPORT_SYMBOL (pci_disable_link_state)
void	pcie_clear_aspm (struct pci_bus *bus)
	module_param_call (policy, pcie_aspm_set_policy, pcie_aspm_get_policy, NULL, 0644)
	__setup ("pcie_aspm=", pcie_aspm_disable)
void	pcie_no_aspm (void)
int	pcie_aspm_enabled (void)
	EXPORT_SYMBOL (pcie_aspm_enabled)
bool	pcie_aspm_support_enabled (void)
	EXPORT_SYMBOL (pcie_aspm_support_enabled)

Macro Definition Documentation

#define ASPM_STATE_ALL   (ASPM_STATE_L0S | ASPM_STATE_L1)

Definition at line 34 of file aspm.c.

#define ASPM_STATE_L0S   (ASPM_STATE_L0S_UP | ASPM_STATE_L0S_DW)

Definition at line 33 of file aspm.c.

#define ASPM_STATE_L0S_DW   (2) /* Downstream direction L0s state */

Definition at line 31 of file aspm.c.

#define ASPM_STATE_L0S_UP   (1) /* Upstream direction L0s state */

Definition at line 30 of file aspm.c.

#define ASPM_STATE_L1   (4) /* L1 state */

Definition at line 32 of file aspm.c.

#define LINK_RETRAIN_TIMEOUT   HZ

Definition at line 94 of file aspm.c.

#define MODULE_PARAM_PREFIX   "pcie_aspm."

Definition at line 27 of file aspm.c.

#define POLICY_DEFAULT   0 /* BIOS default setting */

Definition at line 76 of file aspm.c.

#define POLICY_PERFORMANCE   1 /* high performance */

Definition at line 77 of file aspm.c.

#define POLICY_POWERSAVE   2 /* high power saving */

Definition at line 78 of file aspm.c.

Function Documentation

__setup

(

)

EXPORT_SYMBOL

(

pci_disable_link_state_locked

)

EXPORT_SYMBOL

(

pci_disable_link_state

)

EXPORT_SYMBOL

(

pcie_aspm_enabled

)

EXPORT_SYMBOL

(

pcie_aspm_support_enabled

)

module_param_call	(	policy	,
		pcie_aspm_set_policy	,
		pcie_aspm_get_policy	,
		NULL	,
		0644
	)

void pci_disable_link_state	(	struct pci_dev *	pdev,
		int	state
	)

Definition at line 766 of file aspm.c.

void pci_disable_link_state_locked	(	struct pci_dev *	pdev,
		int	state
	)

Definition at line 760 of file aspm.c.

int pcie_aspm_enabled

(

void

)

pcie_aspm_enabled - is PCIe ASPM enabled?

Returns true if ASPM has not been disabled by the command-line option pcie_aspm=off.

Definition at line 977 of file aspm.c.

void pcie_aspm_exit_link_state

(

struct pci_dev *

pdev

)

Definition at line 634 of file aspm.c.

void pcie_aspm_init_link_state

(

struct pci_dev *

pdev

)

Definition at line 556 of file aspm.c.

void pcie_aspm_pm_state_change

(

struct pci_dev *

pdev

)

Definition at line 676 of file aspm.c.

void pcie_aspm_powersave_config_link

(

struct pci_dev *

pdev

)

Definition at line 697 of file aspm.c.

bool pcie_aspm_support_enabled

(

void

)

Definition at line 983 of file aspm.c.

void pcie_clear_aspm

(

struct pci_bus *

bus

)

Definition at line 772 of file aspm.c.

void pcie_no_aspm

(

void

)

Definition at line 957 of file aspm.c.