text: #ifndef DRIVERS_PCI_H
  #define DRIVERS_PCI_H
  
  #define PCI_CFG_SPACE_SIZE	256
  #define PCI_CFG_SPACE_EXP_SIZE	4096
  
  extern const unsigned char pcie_link_speed[];
  
  /* Functions internal to the PCI core code */
  
  int pci_create_sysfs_dev_files(struct pci_dev *pdev);
  void pci_remove_sysfs_dev_files(struct pci_dev *pdev);
  #if !defined(CONFIG_DMI) && !defined(CONFIG_ACPI)
  static inline void pci_create_firmware_label_files(struct pci_dev *pdev)
  { return; }
  static inline void pci_remove_firmware_label_files(struct pci_dev *pdev)
  { return; }
  #else
  void pci_create_firmware_label_files(struct pci_dev *pdev);
  void pci_remove_firmware_label_files(struct pci_dev *pdev);
  #endif
  void pci_cleanup_rom(struct pci_dev *dev);
  #ifdef HAVE_PCI_MMAP
  enum pci_mmap_api {
  	PCI_MMAP_SYSFS,	/* mmap on /sys/bus/pci/devices/<BDF>/resource<N> */
  	PCI_MMAP_PROCFS	/* mmap on /proc/bus/pci/<BDF> */
  };
  int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vmai,
  		  enum pci_mmap_api mmap_api);
  #endif
  int pci_probe_reset_function(struct pci_dev *dev);
  
  /**
   * struct pci_platform_pm_ops - Firmware PM callbacks
   *
   * @is_manageable: returns 'true' if given device is power manageable by the
   *                 platform firmware
   *
   * @set_state: invokes the platform firmware to set the device's power state
   *
   * @choose_state: returns PCI power state of given device preferred by the
   *                platform; to be used during system-wide transitions from a
   *                sleeping state to the working state and vice versa
   *
   * @sleep_wake: enables/disables the system wake up capability of given device
   *
   * @run_wake: enables/disables the platform to generate run-time wake-up events
   *		for given device (the device's wake-up capability has to be
   *		enabled by @sleep_wake for this feature to work)
   *
   * If given platform is generally capable of power managing PCI devices, all of
   * these callbacks are mandatory.
   */
  struct pci_platform_pm_ops {
  	bool (*is_manageable)(struct pci_dev *dev);
  	int (*set_state)(struct pci_dev *dev, pci_power_t state);
  	pci_power_t (*choose_state)(struct pci_dev *dev);
  	int (*sleep_wake)(struct pci_dev *dev, bool enable);
  	int (*run_wake)(struct pci_dev *dev, bool enable);
  };
  
  int pci_set_platform_pm(struct pci_platform_pm_ops *ops);
  void pci_update_current_state(struct pci_dev *dev, pci_power_t state);
  void pci_power_up(struct pci_dev *dev);
  void pci_disable_enabled_device(struct pci_dev *dev);
  int pci_finish_runtime_suspend(struct pci_dev *dev);
  int __pci_pme_wakeup(struct pci_dev *dev, void *ign);
  void pci_config_pm_runtime_get(struct pci_dev *dev);
  void pci_config_pm_runtime_put(struct pci_dev *dev);
  void pci_pm_init(struct pci_dev *dev);
  void pci_allocate_cap_save_buffers(struct pci_dev *dev);
  void pci_free_cap_save_buffers(struct pci_dev *dev);
  
  static inline void pci_wakeup_event(struct pci_dev *dev)
  {
  	/* Wait 100 ms before the system can be put into a sleep state. */
  	pm_wakeup_event(&dev->dev, 100);
  }
  
  static inline bool pci_has_subordinate(struct pci_dev *pci_dev)
  {
  	return !!(pci_dev->subordinate);
  }
  
  struct pci_vpd_ops {
  	ssize_t (*read)(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
  	ssize_t (*write)(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
  	void (*release)(struct pci_dev *dev);
  };
  
  struct pci_vpd {
  	unsigned int len;
  	const struct pci_vpd_ops *ops;
  	struct bin_attribute *attr; /* descriptor for sysfs VPD entry */
  };
  
  int pci_vpd_pci22_init(struct pci_dev *dev);
  static inline void pci_vpd_release(struct pci_dev *dev)
  {
  	if (dev->vpd)
  		dev->vpd->ops->release(dev);
  }
  
  /* PCI /proc functions */
  #ifdef CONFIG_PROC_FS
  int pci_proc_attach_device(struct pci_dev *dev);
  int pci_proc_detach_device(struct pci_dev *dev);
  int pci_proc_detach_bus(struct pci_bus *bus);
  #else
  static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; }
  static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; }
  static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
  #endif
  
  /* Functions for PCI Hotplug drivers to use */
  int pci_hp_add_bridge(struct pci_dev *dev);
  
  #ifdef HAVE_PCI_LEGACY
  void pci_create_legacy_files(struct pci_bus *bus);
  void pci_remove_legacy_files(struct pci_bus *bus);
  #else
  static inline void pci_create_legacy_files(struct pci_bus *bus) { return; }
  static inline void pci_remove_legacy_files(struct pci_bus *bus) { return; }
  #endif
  
  /* Lock for read/write access to pci device and bus lists */
  extern struct rw_semaphore pci_bus_sem;
  
  extern raw_spinlock_t pci_lock;
  
  extern unsigned int pci_pm_d3_delay;
  
  #ifdef CONFIG_PCI_MSI
  void pci_no_msi(void);
  void pci_msi_init_pci_dev(struct pci_dev *dev);
  #else
  static inline void pci_no_msi(void) { }
  static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { }
  #endif
  
  void pci_realloc_get_opt(char *);
  
  static inline int pci_no_d1d2(struct pci_dev *dev)
  {
  	unsigned int parent_dstates = 0;
  
  	if (dev->bus->self)
  		parent_dstates = dev->bus->self->no_d1d2;
  	return (dev->no_d1d2 || parent_dstates);
  
  }
  extern const struct attribute_group *pci_dev_groups[];
  extern const struct attribute_group *pcibus_groups[];
  extern struct device_type pci_dev_type;
  extern const struct attribute_group *pci_bus_groups[];
  
  
  /**
   * pci_match_one_device - Tell if a PCI device structure has a matching
   *                        PCI device id structure
   * @id: single PCI device id structure to match
   * @dev: the PCI device structure to match against
   *
   * Returns the matching pci_device_id structure or %NULL if there is no match.
   */
  static inline const struct pci_device_id *
  pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev)
  {
  	if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) &&
  	    (id->device == PCI_ANY_ID || id->device == dev->device) &&
  	    (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) &&
  	    (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) &&
  	    !((id->class ^ dev->class) & id->class_mask))
  		return id;
  	return NULL;
  }
  
  /* PCI slot sysfs helper code */
  #define to_pci_slot(s) container_of(s, struct pci_slot, kobj)
  
  extern struct kset *pci_slots_kset;
  
  struct pci_slot_attribute {
  	struct attribute attr;
  	ssize_t (*show)(struct pci_slot *, char *);
  	ssize_t (*store)(struct pci_slot *, const char *, size_t);
  };
  #define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)
  
  enum pci_bar_type {
  	pci_bar_unknown,	/* Standard PCI BAR probe */
  	pci_bar_io,		/* An io port BAR */
  	pci_bar_mem32,		/* A 32-bit memory BAR */
  	pci_bar_mem64,		/* A 64-bit memory BAR */
  };
  
  bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
  				int crs_timeout);
  int pci_setup_device(struct pci_dev *dev);
  int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
  		    struct resource *res, unsigned int reg);
  int pci_resource_bar(struct pci_dev *dev, int resno, enum pci_bar_type *type);
  void pci_configure_ari(struct pci_dev *dev);
  void __pci_bus_size_bridges(struct pci_bus *bus,
  			struct list_head *realloc_head);
  void __pci_bus_assign_resources(const struct pci_bus *bus,
  				struct list_head *realloc_head,
  				struct list_head *fail_head);
  
  /**
   * pci_ari_enabled - query ARI forwarding status
   * @bus: the PCI bus
   *
   * Returns 1 if ARI forwarding is enabled, or 0 if not enabled;
   */
  static inline int pci_ari_enabled(struct pci_bus *bus)
  {
  	return bus->self && bus->self->ari_enabled;
  }
  
  void pci_reassigndev_resource_alignment(struct pci_dev *dev);
  void pci_disable_bridge_window(struct pci_dev *dev);
  
  /* Single Root I/O Virtualization */
  struct pci_sriov {
  	int pos;		/* capability position */
  	int nres;		/* number of resources */
  	u32 cap;		/* SR-IOV Capabilities */
  	u16 ctrl;		/* SR-IOV Control */
  	u16 total_VFs;		/* total VFs associated with the PF */
  	u16 initial_VFs;	/* initial VFs associated with the PF */
  	u16 num_VFs;		/* number of VFs available */
  	u16 offset;		/* first VF Routing ID offset */
  	u16 stride;		/* following VF stride */
  	u32 pgsz;		/* page size for BAR alignment */
  	u8 link;		/* Function Dependency Link */
  	u16 driver_max_VFs;	/* max num VFs driver supports */
  	struct pci_dev *dev;	/* lowest numbered PF */
  	struct pci_dev *self;	/* this PF */
  	struct mutex lock;	/* lock for VF bus */
  };
  
  #ifdef CONFIG_PCI_ATS
  void pci_restore_ats_state(struct pci_dev *dev);
  #else
  static inline void pci_restore_ats_state(struct pci_dev *dev)
  {
  }
  #endif /* CONFIG_PCI_ATS */
  
  #ifdef CONFIG_PCI_IOV
  int pci_iov_init(struct pci_dev *dev);
  void pci_iov_release(struct pci_dev *dev);
  int pci_iov_resource_bar(struct pci_dev *dev, int resno,
  			 enum pci_bar_type *type);
  resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno);
  void pci_restore_iov_state(struct pci_dev *dev);
  int pci_iov_bus_range(struct pci_bus *bus);
  
  #else
  static inline int pci_iov_init(struct pci_dev *dev)
  {
  	return -ENODEV;
  }
  static inline void pci_iov_release(struct pci_dev *dev)
  
  {
  }
  static inline int pci_iov_resource_bar(struct pci_dev *dev, int resno,
  				       enum pci_bar_type *type)
  {
  	return 0;
  }
  static inline void pci_restore_iov_state(struct pci_dev *dev)
  {
  }
  static inline int pci_iov_bus_range(struct pci_bus *bus)
  {
  	return 0;
  }
  
  #endif /* CONFIG_PCI_IOV */
  
  unsigned long pci_cardbus_resource_alignment(struct resource *);
  
  static inline resource_size_t pci_resource_alignment(struct pci_dev *dev,
  						     struct resource *res)
  {
  #ifdef CONFIG_PCI_IOV
  	int resno = res - dev->resource;
  
  	if (resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END)
  		return pci_sriov_resource_alignment(dev, resno);
  #endif
  	if (dev->class >> 8  == PCI_CLASS_BRIDGE_CARDBUS)
  		return pci_cardbus_resource_alignment(res);
  	return resource_alignment(res);
  }
  
  void pci_enable_acs(struct pci_dev *dev);
  
  struct pci_dev_reset_methods {
  	u16 vendor;
  	u16 device;
  	int (*reset)(struct pci_dev *dev, int probe);
  };
  
  #ifdef CONFIG_PCI_QUIRKS
  int pci_dev_specific_reset(struct pci_dev *dev, int probe);
  #else
  static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe)
  {
  	return -ENOTTY;
  }
  #endif
  
  #endif /* DRIVERS_PCI_H */
  