3 files changed, 69 insertions, 0 deletions

diff --git a/include/linux/pci-aspm.h b/include/linux/pci-aspm.h
new file mode 100644
index 000000000000..a1a1e618e996
--- /dev/null
+++ b/include/linux/pci-aspm.h
@@ -0,0 +1,56 @@
+/*
+ *      aspm.h
+ *
+ *      PCI Express ASPM defines and function prototypes
+ *
+ *      Copyright (C) 2007 Intel Corp.
+ *              Zhang Yanmin (yanmin.zhang@intel.com)
+ *              Shaohua Li (shaohua.li@intel.com)
+ *
+ *      For more information, please consult the following manuals (look at
+ *      http://www.pcisig.com/ for how to get them):
+ *
+ *      PCI Express Specification
+ */
+
+#ifndef LINUX_ASPM_H
+#define LINUX_ASPM_H
+
+#include <linux/pci.h>
+
+#define PCIE_LINK_STATE_L0S     1
+#define PCIE_LINK_STATE_L1      2
+#define PCIE_LINK_STATE_CLKPM   4
+
+#ifdef CONFIG_PCIEASPM
+extern void pcie_aspm_init_link_state(struct pci_dev *pdev);
+extern void pcie_aspm_exit_link_state(struct pci_dev *pdev);
+extern void pcie_aspm_pm_state_change(struct pci_dev *pdev);
+extern void pci_disable_link_state(struct pci_dev *pdev, int state);
+#else
+static inline void pcie_aspm_init_link_state(struct pci_dev *pdev)
+{
+}
+static inline void pcie_aspm_exit_link_state(struct pci_dev *pdev)
+{
+}
+static inline void pcie_aspm_pm_state_change(struct pci_dev *pdev)
+{
+}
+static inline void pci_disable_link_state(struct pci_dev *pdev, int state)
+{
+}
+#endif
+
+#ifdef CONFIG_PCIEASPM_DEBUG /* this depends on CONFIG_PCIEASPM */
+extern void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev);
+extern void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev);
+#else
+static inline void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev)
+{
+}
+static inline void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev)
+{
+}
+#endif
+#endif /* LINUX_ASPM_H */
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 3b8a4e17052f..14bf3d236d19 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -128,6 +128,7 @@ struct pci_cap_saved_state {
         u32 data[0];
 };
 
+struct pcie_link_state;
 /*
  * The pci_dev structure is used to describe PCI devices.
  */
@@ -164,6 +165,10 @@ struct pci_dev {
                                            this is D0-D3, D0 being fully functional,
                                            and D3 being off. */
 
+#ifdef CONFIG_PCIEASPM
+        struct pcie_link_state  *link_state;    /* ASPM link state. */
+#endif
+
         pci_channel_state_t error_state;        /* current connectivity state */
         struct  device  dev;            /* Generic device interface */
 
diff --git a/include/linux/pci_regs.h b/include/linux/pci_regs.h
index c1914a8b94a9..c0c1223c9194 100644
--- a/include/linux/pci_regs.h
+++ b/include/linux/pci_regs.h
@@ -395,9 +395,17 @@
 #define  PCI_EXP_DEVSTA_AUXPD   0x10    /* AUX Power Detected */
 #define  PCI_EXP_DEVSTA_TRPND   0x20    /* Transactions Pending */
 #define PCI_EXP_LNKCAP          12      /* Link Capabilities */
+#define  PCI_EXP_LNKCAP_ASPMS   0xc00   /* ASPM Support */
+#define  PCI_EXP_LNKCAP_L0SEL   0x7000  /* L0s Exit Latency */
+#define  PCI_EXP_LNKCAP_L1EL    0x38000 /* L1 Exit Latency */
+#define  PCI_EXP_LNKCAP_CLKPM   0x40000 /* L1 Clock Power Management */
 #define PCI_EXP_LNKCTL          16      /* Link Control */
+#define  PCI_EXP_LNKCTL_RL      0x20    /* Retrain Link */
+#define  PCI_EXP_LNKCTL_CCC     0x40    /* Common Clock COnfiguration */
 #define  PCI_EXP_LNKCTL_CLKREQ_EN 0x100 /* Enable clkreq */
 #define PCI_EXP_LNKSTA          18      /* Link Status */
+#define  PCI_EXP_LNKSTA_LT      0x800   /* Link Training */
+#define  PCI_EXP_LNKSTA_SLC     0x1000  /* Slot Clock Configuration */
 #define PCI_EXP_SLTCAP          20      /* Slot Capabilities */
 #define PCI_EXP_SLTCTL          24      /* Slot Control */
 #define PCI_EXP_SLTSTA          26      /* Slot Status */