blob: c8320144fe790cc3fb8dc5fe593092412a838bae [file] [log] [blame]
Shaohua Li7d715a62008-02-25 09:46:41 +08001/*
2 * aspm.h
3 *
4 * PCI Express ASPM defines and function prototypes
5 *
6 * Copyright (C) 2007 Intel Corp.
7 * Zhang Yanmin (yanmin.zhang@intel.com)
8 * Shaohua Li (shaohua.li@intel.com)
9 *
10 * For more information, please consult the following manuals (look at
11 * http://www.pcisig.com/ for how to get them):
12 *
13 * PCI Express Specification
14 */
15
16#ifndef LINUX_ASPM_H
17#define LINUX_ASPM_H
18
19#include <linux/pci.h>
20
21#define PCIE_LINK_STATE_L0S 1
22#define PCIE_LINK_STATE_L1 2
23#define PCIE_LINK_STATE_CLKPM 4
24
25#ifdef CONFIG_PCIEASPM
26extern void pcie_aspm_init_link_state(struct pci_dev *pdev);
27extern void pcie_aspm_exit_link_state(struct pci_dev *pdev);
28extern void pcie_aspm_pm_state_change(struct pci_dev *pdev);
Naga Chumbalkar1a680b72011-03-21 03:29:08 +000029extern void pcie_aspm_powersave_config_link(struct pci_dev *pdev);
Shaohua Li7d715a62008-02-25 09:46:41 +080030extern void pci_disable_link_state(struct pci_dev *pdev, int state);
Yinghai Lu9f728f52011-05-12 17:11:47 -070031extern void pci_disable_link_state_locked(struct pci_dev *pdev, int state);
Matthew Garrett3c076352011-11-10 16:38:33 -050032extern void pcie_clear_aspm(struct pci_bus *bus);
Shaohua Li5fde2442008-07-23 10:32:24 +080033extern void pcie_no_aspm(void);
Shaohua Li7d715a62008-02-25 09:46:41 +080034#else
35static inline void pcie_aspm_init_link_state(struct pci_dev *pdev)
36{
37}
38static inline void pcie_aspm_exit_link_state(struct pci_dev *pdev)
39{
40}
41static inline void pcie_aspm_pm_state_change(struct pci_dev *pdev)
42{
43}
Naga Chumbalkar1a680b72011-03-21 03:29:08 +000044static inline void pcie_aspm_powersave_config_link(struct pci_dev *pdev)
45{
46}
Shaohua Li7d715a62008-02-25 09:46:41 +080047static inline void pci_disable_link_state(struct pci_dev *pdev, int state)
48{
49}
Matthew Garrett3c076352011-11-10 16:38:33 -050050static inline void pcie_clear_aspm(struct pci_bus *bus)
Matthew Garrett2f671e22010-12-06 14:00:56 -050051{
52}
Shaohua Li5fde2442008-07-23 10:32:24 +080053static inline void pcie_no_aspm(void)
54{
55}
Shaohua Li7d715a62008-02-25 09:46:41 +080056#endif
57
58#ifdef CONFIG_PCIEASPM_DEBUG /* this depends on CONFIG_PCIEASPM */
59extern void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev);
60extern void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev);
61#else
62static inline void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev)
63{
64}
65static inline void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev)
66{
67}
68#endif
69#endif /* LINUX_ASPM_H */