drivers/pci/pci.h

   1 #ifndef DRIVERS_PCI_H
   2 #define DRIVERS_PCI_H
   3
   4 #define PCI_CFG_SPACE_SIZE      256
   5 #define PCI_CFG_SPACE_EXP_SIZE  4096
   6
   7 /* Functions internal to the PCI core code */
   8
   9 extern int pci_uevent(struct device *dev, struct kobj_uevent_env *env);
  10 extern int pci_create_sysfs_dev_files(struct pci_dev *pdev);
  11 extern void pci_remove_sysfs_dev_files(struct pci_dev *pdev);
  12 extern void pci_cleanup_rom(struct pci_dev *dev);
  13
  14 /**
  15  * Firmware PM callbacks
  16  *
  17  * @is_manageable - returns 'true' if given device is power manageable by the
  18  *                  platform firmware
  19  *
  20  * @set_state - invokes the platform firmware to set the device's power state
  21  *
  22  * @choose_state - returns PCI power state of given device preferred by the
  23  *                 platform; to be used during system-wide transitions from a
  24  *                 sleeping state to the working state and vice versa
  25  *
  26  * @can_wakeup - returns 'true' if given device is capable of waking up the
  27  *               system from a sleeping state
  28  *
  29  * @sleep_wake - enables/disables the system wake up capability of given device
  30  *
  31  * If given platform is generally capable of power managing PCI devices, all of
  32  * these callbacks are mandatory.
  33  */
  34 struct pci_platform_pm_ops {
  35         bool (*is_manageable)(struct pci_dev *dev);
  36         int (*set_state)(struct pci_dev *dev, pci_power_t state);
  37         pci_power_t (*choose_state)(struct pci_dev *dev);
  38         bool (*can_wakeup)(struct pci_dev *dev);
  39         int (*sleep_wake)(struct pci_dev *dev, bool enable);
  40 };
  41
  42 extern int pci_set_platform_pm(struct pci_platform_pm_ops *ops);
  43 extern void pci_pm_init(struct pci_dev *dev);
  44
  45 extern int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
  46 extern int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
  47 extern int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val);
  48 extern int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val);
  49 extern int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val);
  50 extern int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val);
  51
  52 struct pci_vpd_ops {
  53         int (*read)(struct pci_dev *dev, int pos, int size, char *buf);
  54         int (*write)(struct pci_dev *dev, int pos, int size, const char *buf);
  55         void (*release)(struct pci_dev *dev);
  56 };
  57
  58 struct pci_vpd {
  59         unsigned int len;
  60         struct pci_vpd_ops *ops;
  61         struct bin_attribute *attr; /* descriptor for sysfs VPD entry */
  62 };
  63
  64 extern int pci_vpd_pci22_init(struct pci_dev *dev);
  65 static inline void pci_vpd_release(struct pci_dev *dev)
  66 {
  67         if (dev->vpd)
  68                 dev->vpd->ops->release(dev);
  69 }
  70
  71 /* PCI /proc functions */
  72 #ifdef CONFIG_PROC_FS
  73 extern int pci_proc_attach_device(struct pci_dev *dev);
  74 extern int pci_proc_detach_device(struct pci_dev *dev);
  75 extern int pci_proc_detach_bus(struct pci_bus *bus);
  76 #else
  77 static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; }
  78 static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; }
  79 static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
  80 #endif
  81
  82 /* Functions for PCI Hotplug drivers to use */
  83 extern unsigned int pci_do_scan_bus(struct pci_bus *bus);
  84
  85 extern void pci_remove_legacy_files(struct pci_bus *bus);
  86
  87 /* Lock for read/write access to pci device and bus lists */
  88 extern struct rw_semaphore pci_bus_sem;
  89
  90 extern unsigned int pci_pm_d3_delay;
  91
  92 #ifdef CONFIG_PCI_MSI
  93 void pci_no_msi(void);
  94 extern void pci_msi_init_pci_dev(struct pci_dev *dev);
  95 #else
  96 static inline void pci_no_msi(void) { }
  97 static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { }
  98 #endif
  99
 100 #ifdef CONFIG_PCIEAER
 101 void pci_no_aer(void);
 102 #else
 103 static inline void pci_no_aer(void) { }
 104 #endif
 105
 106 static inline int pci_no_d1d2(struct pci_dev *dev)
 107 {
 108         unsigned int parent_dstates = 0;
 109
 110         if (dev->bus->self)
 111                 parent_dstates = dev->bus->self->no_d1d2;
 112         return (dev->no_d1d2 || parent_dstates);
 113
 114 }
 115 extern int pcie_mch_quirk;
 116 extern struct device_attribute pci_dev_attrs[];
 117 extern struct device_attribute dev_attr_cpuaffinity;
 118 extern struct device_attribute dev_attr_cpulistaffinity;
 119
 120 /**
 121  * pci_match_one_device - Tell if a PCI device structure has a matching
 122  *                        PCI device id structure
 123  * @id: single PCI device id structure to match
 124  * @dev: the PCI device structure to match against
 125  *
 126  * Returns the matching pci_device_id structure or %NULL if there is no match.
 127  */
 128 static inline const struct pci_device_id *
 129 pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev)
 130 {
 131         if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) &&
 132             (id->device == PCI_ANY_ID || id->device == dev->device) &&
 133             (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) &&
 134             (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) &&
 135             !((id->class ^ dev->class) & id->class_mask))
 136                 return id;
 137         return NULL;
 138 }
 139
 140 struct pci_dev *pci_find_upstream_pcie_bridge(struct pci_dev *pdev);
 141
 142 /* PCI slot sysfs helper code */
 143 #define to_pci_slot(s) container_of(s, struct pci_slot, kobj)
 144
 145 extern struct kset *pci_slots_kset;
 146
 147 struct pci_slot_attribute {
 148         struct attribute attr;
 149         ssize_t (*show)(struct pci_slot *, char *);
 150         ssize_t (*store)(struct pci_slot *, const char *, size_t);
 151 };
 152 #define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)
 153
 154 extern void pci_enable_ari(struct pci_dev *dev);
 155 /**
 156  * pci_ari_enabled - query ARI forwarding status
 157  * @dev: the PCI device
 158  *
 159  * Returns 1 if ARI forwarding is enabled, or 0 if not enabled;
 160  */
 161 static inline int pci_ari_enabled(struct pci_dev *dev)
 162 {
 163         return dev->ari_enabled;
 164 }
 165
 166 #endif /* DRIVERS_PCI_H */