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 #ifdef HAVE_PCI_MMAP
  14 extern int pci_mmap_fits(struct pci_dev *pdev, int resno,
  15                          struct vm_area_struct *vma);
  16 #endif
  17
  18 /**
  19  * struct pci_platform_pm_ops - Firmware PM callbacks
  20  *
  21  * @is_manageable: returns 'true' if given device is power manageable by the
  22  *                 platform firmware
  23  *
  24  * @set_state: invokes the platform firmware to set the device's power state
  25  *
  26  * @choose_state: returns PCI power state of given device preferred by the
  27  *                platform; to be used during system-wide transitions from a
  28  *                sleeping state to the working state and vice versa
  29  *
  30  * @can_wakeup: returns 'true' if given device is capable of waking up the
  31  *              system from a sleeping state
  32  *
  33  * @sleep_wake: enables/disables the system wake up capability of given device
  34  *
  35  * If given platform is generally capable of power managing PCI devices, all of
  36  * these callbacks are mandatory.
  37  */
  38 struct pci_platform_pm_ops {
  39         bool (*is_manageable)(struct pci_dev *dev);
  40         int (*set_state)(struct pci_dev *dev, pci_power_t state);
  41         pci_power_t (*choose_state)(struct pci_dev *dev);
  42         bool (*can_wakeup)(struct pci_dev *dev);
  43         int (*sleep_wake)(struct pci_dev *dev, bool enable);
  44 };
  45
  46 extern int pci_set_platform_pm(struct pci_platform_pm_ops *ops);
  47 extern void pci_update_current_state(struct pci_dev *dev, pci_power_t state);
  48 extern void pci_disable_enabled_device(struct pci_dev *dev);
  49 extern void pci_pm_init(struct pci_dev *dev);
  50 extern void platform_pci_wakeup_init(struct pci_dev *dev);
  51 extern void pci_allocate_cap_save_buffers(struct pci_dev *dev);
  52 extern int pci_restore_standard_config(struct pci_dev *dev);
  53
  54 static inline bool pci_is_bridge(struct pci_dev *pci_dev)
  55 {
  56         return !!(pci_dev->subordinate);
  57 }
  58
  59 extern int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
  60 extern int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
  61 extern int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val);
  62 extern int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val);
  63 extern int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val);
  64 extern int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val);
  65
  66 struct pci_vpd_ops {
  67         ssize_t (*read)(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
  68         ssize_t (*write)(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
  69         void (*release)(struct pci_dev *dev);
  70 };
  71
  72 struct pci_vpd {
  73         unsigned int len;
  74         const struct pci_vpd_ops *ops;
  75         struct bin_attribute *attr; /* descriptor for sysfs VPD entry */
  76 };
  77
  78 extern int pci_vpd_pci22_init(struct pci_dev *dev);
  79 static inline void pci_vpd_release(struct pci_dev *dev)
  80 {
  81         if (dev->vpd)
  82                 dev->vpd->ops->release(dev);
  83 }
  84
  85 /* PCI /proc functions */
  86 #ifdef CONFIG_PROC_FS
  87 extern int pci_proc_attach_device(struct pci_dev *dev);
  88 extern int pci_proc_detach_device(struct pci_dev *dev);
  89 extern int pci_proc_detach_bus(struct pci_bus *bus);
  90 #else
  91 static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; }
  92 static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; }
  93 static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
  94 #endif
  95
  96 /* Functions for PCI Hotplug drivers to use */
  97 extern unsigned int pci_do_scan_bus(struct pci_bus *bus);
  98
  99 #ifdef HAVE_PCI_LEGACY
 100 extern void pci_create_legacy_files(struct pci_bus *bus);
 101 extern void pci_remove_legacy_files(struct pci_bus *bus);
 102 #else
 103 static inline void pci_create_legacy_files(struct pci_bus *bus) { return; }
 104 static inline void pci_remove_legacy_files(struct pci_bus *bus) { return; }
 105 #endif
 106
 107 /* Lock for read/write access to pci device and bus lists */
 108 extern struct rw_semaphore pci_bus_sem;
 109
 110 extern unsigned int pci_pm_d3_delay;
 111
 112 #ifdef CONFIG_PCI_MSI
 113 void pci_no_msi(void);
 114 extern void pci_msi_init_pci_dev(struct pci_dev *dev);
 115 #else
 116 static inline void pci_no_msi(void) { }
 117 static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { }
 118 #endif
 119
 120 #ifdef CONFIG_PCIEAER
 121 void pci_no_aer(void);
 122 #else
 123 static inline void pci_no_aer(void) { }
 124 #endif
 125
 126 static inline int pci_no_d1d2(struct pci_dev *dev)
 127 {
 128         unsigned int parent_dstates = 0;
 129
 130         if (dev->bus->self)
 131                 parent_dstates = dev->bus->self->no_d1d2;
 132         return (dev->no_d1d2 || parent_dstates);
 133
 134 }
 135 extern int pcie_mch_quirk;
 136 extern struct device_attribute pci_dev_attrs[];
 137 extern struct device_attribute dev_attr_cpuaffinity;
 138 extern struct device_attribute dev_attr_cpulistaffinity;
 139
 140 /**
 141  * pci_match_one_device - Tell if a PCI device structure has a matching
 142  *                        PCI device id structure
 143  * @id: single PCI device id structure to match
 144  * @dev: the PCI device structure to match against
 145  *
 146  * Returns the matching pci_device_id structure or %NULL if there is no match.
 147  */
 148 static inline const struct pci_device_id *
 149 pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev)
 150 {
 151         if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) &&
 152             (id->device == PCI_ANY_ID || id->device == dev->device) &&
 153             (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) &&
 154             (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) &&
 155             !((id->class ^ dev->class) & id->class_mask))
 156                 return id;
 157         return NULL;
 158 }
 159
 160 struct pci_dev *pci_find_upstream_pcie_bridge(struct pci_dev *pdev);
 161
 162 /* PCI slot sysfs helper code */
 163 #define to_pci_slot(s) container_of(s, struct pci_slot, kobj)
 164
 165 extern struct kset *pci_slots_kset;
 166
 167 struct pci_slot_attribute {
 168         struct attribute attr;
 169         ssize_t (*show)(struct pci_slot *, char *);
 170         ssize_t (*store)(struct pci_slot *, const char *, size_t);
 171 };
 172 #define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)
 173
 174 enum pci_bar_type {
 175         pci_bar_unknown,        /* Standard PCI BAR probe */
 176         pci_bar_io,             /* An io port BAR */
 177         pci_bar_mem32,          /* A 32-bit memory BAR */
 178         pci_bar_mem64,          /* A 64-bit memory BAR */
 179 };
 180
 181 extern int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
 182                                 struct resource *res, unsigned int reg);
 183 extern int pci_resource_bar(struct pci_dev *dev, int resno,
 184                             enum pci_bar_type *type);
 185 extern int pci_bus_add_child(struct pci_bus *bus);
 186 extern void pci_enable_ari(struct pci_dev *dev);
 187 /**
 188  * pci_ari_enabled - query ARI forwarding status
 189  * @bus: the PCI bus
 190  *
 191  * Returns 1 if ARI forwarding is enabled, or 0 if not enabled;
 192  */
 193 static inline int pci_ari_enabled(struct pci_bus *bus)
 194 {
 195         return bus->self && bus->self->ari_enabled;
 196 }
 197
 198 #endif /* DRIVERS_PCI_H */