tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * aspm.h
4 *
5 * PCI Express ASPM defines and function prototypes
6 *
7 * Copyright (C) 2007 Intel Corp.
8 * Zhang Yanmin (yanmin.zhang@intel.com)
9 * Shaohua Li (shaohua.li@intel.com)
10 *
11 * For more information, please consult the following manuals (look at
12 * http://www.pcisig.com/ for how to get them):
13 *
14 * PCI Express Specification
15 */
16
17#ifndef LINUX_ASPM_H
18#define LINUX_ASPM_H
19
20#include <linux/pci.h>
21
22#define PCIE_LINK_STATE_L0S 1
23#define PCIE_LINK_STATE_L1 2
24#define PCIE_LINK_STATE_CLKPM 4
25
26#ifdef CONFIG_PCIEASPM
27void pcie_aspm_init_link_state(struct pci_dev *pdev);
28void pcie_aspm_exit_link_state(struct pci_dev *pdev);
29void pcie_aspm_pm_state_change(struct pci_dev *pdev);
30void pcie_aspm_powersave_config_link(struct pci_dev *pdev);
31void pci_disable_link_state(struct pci_dev *pdev, int state);
32void pci_disable_link_state_locked(struct pci_dev *pdev, int state);
33void pcie_no_aspm(void);
34#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}
44static inline void pcie_aspm_powersave_config_link(struct pci_dev *pdev)
45{
46}
47static inline void pci_disable_link_state(struct pci_dev *pdev, int state)
48{
49}
50static inline void pcie_no_aspm(void)
51{
52}
53#endif
54
55#ifdef CONFIG_PCIEASPM_DEBUG /* this depends on CONFIG_PCIEASPM */
56void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev);
57void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev);
58#else
59static inline void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev)
60{
61}
62static inline void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev)
63{
64}
65#endif
66#endif /* LINUX_ASPM_H */