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  * 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_disable_enabled_device(struct pci_dev *dev);
  48 extern void pci_pm_init(struct pci_dev *dev);
  49 extern void platform_pci_wakeup_init(struct pci_dev *dev);
  50 extern void pci_allocate_cap_save_buffers(struct pci_dev *dev);
  51
  52 extern int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
  53 extern int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
  54 extern int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val);
  55 extern int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val);
  56 extern int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val);
  57 extern int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val);
  58
  59 struct pci_vpd_ops {
  60         ssize_t (*read)(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
  61         ssize_t (*write)(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
  62         void (*release)(struct pci_dev *dev);
  63 };
  64
  65 struct pci_vpd {
  66         unsigned int len;
  67         const struct pci_vpd_ops *ops;
  68         struct bin_attribute *attr; /* descriptor for sysfs VPD entry */
  69 };
  70
  71 extern int pci_vpd_pci22_init(struct pci_dev *dev);
  72 static inline void pci_vpd_release(struct pci_dev *dev)
  73 {
  74         if (dev->vpd)
  75                 dev->vpd->ops->release(dev);
  76 }
  77
  78 /* PCI /proc functions */
  79 #ifdef CONFIG_PROC_FS
  80 extern int pci_proc_attach_device(struct pci_dev *dev);
  81 extern int pci_proc_detach_device(struct pci_dev *dev);
  82 extern int pci_proc_detach_bus(struct pci_bus *bus);
  83 #else
  84 static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; }
  85 static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; }
  86 static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
  87 #endif
  88
  89 /* Functions for PCI Hotplug drivers to use */
  90 extern unsigned int pci_do_scan_bus(struct pci_bus *bus);
  91
  92 #ifdef HAVE_PCI_LEGACY
  93 extern void pci_create_legacy_files(struct pci_bus *bus);
  94 extern void pci_remove_legacy_files(struct pci_bus *bus);
  95 #else
  96 static inline void pci_create_legacy_files(struct pci_bus *bus) { return; }
  97 static inline void pci_remove_legacy_files(struct pci_bus *bus) { return; }
  98 #endif
  99
 100 /* Lock for read/write access to pci device and bus lists */
 101 extern struct rw_semaphore pci_bus_sem;
 102
 103 extern unsigned int pci_pm_d3_delay;
 104
 105 #ifdef CONFIG_PCI_MSI
 106 void pci_no_msi(void);
 107 extern void pci_msi_init_pci_dev(struct pci_dev *dev);
 108 #else
 109 static inline void pci_no_msi(void) { }
 110 static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { }
 111 #endif
 112
 113 #ifdef CONFIG_PCIEAER
 114 void pci_no_aer(void);
 115 #else
 116 static inline void pci_no_aer(void) { }
 117 #endif
 118
 119 static inline int pci_no_d1d2(struct pci_dev *dev)
 120 {
 121         unsigned int parent_dstates = 0;
 122
 123         if (dev->bus->self)
 124                 parent_dstates = dev->bus->self->no_d1d2;
 125         return (dev->no_d1d2 || parent_dstates);
 126
 127 }
 128 extern int pcie_mch_quirk;
 129 extern struct device_attribute pci_dev_attrs[];
 130 extern struct device_attribute dev_attr_cpuaffinity;
 131 extern struct device_attribute dev_attr_cpulistaffinity;
 132
 133 /**
 134  * pci_match_one_device - Tell if a PCI device structure has a matching
 135  *                        PCI device id structure
 136  * @id: single PCI device id structure to match
 137  * @dev: the PCI device structure to match against
 138  *
 139  * Returns the matching pci_device_id structure or %NULL if there is no match.
 140  */
 141 static inline const struct pci_device_id *
 142 pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev)
 143 {
 144         if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) &&
 145             (id->device == PCI_ANY_ID || id->device == dev->device) &&
 146             (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) &&
 147             (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) &&
 148             !((id->class ^ dev->class) & id->class_mask))
 149                 return id;
 150         return NULL;
 151 }
 152
 153 struct pci_dev *pci_find_upstream_pcie_bridge(struct pci_dev *pdev);
 154
 155 /* PCI slot sysfs helper code */
 156 #define to_pci_slot(s) container_of(s, struct pci_slot, kobj)
 157
 158 extern struct kset *pci_slots_kset;
 159
 160 struct pci_slot_attribute {
 161         struct attribute attr;
 162         ssize_t (*show)(struct pci_slot *, char *);
 163         ssize_t (*store)(struct pci_slot *, const char *, size_t);
 164 };
 165 #define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)
 166
 167 enum pci_bar_type {
 168         pci_bar_unknown,        /* Standard PCI BAR probe */
 169         pci_bar_io,             /* An io port BAR */
 170         pci_bar_mem32,          /* A 32-bit memory BAR */
 171         pci_bar_mem64,          /* A 64-bit memory BAR */
 172 };
 173
 174 extern int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
 175                                 struct resource *res, unsigned int reg);
 176 extern int pci_resource_bar(struct pci_dev *dev, int resno,
 177                             enum pci_bar_type *type);
 178 extern int pci_bus_add_child(struct pci_bus *bus);
 179 extern void pci_enable_ari(struct pci_dev *dev);
 180 /**
 181  * pci_ari_enabled - query ARI forwarding status
 182  * @bus: the PCI bus
 183  *
 184  * Returns 1 if ARI forwarding is enabled, or 0 if not enabled;
 185  */
 186 static inline int pci_ari_enabled(struct pci_bus *bus)
 187 {
 188         return bus->self && bus->self->ari_enabled;
 189 }
 190
 191 #endif /* DRIVERS_PCI_H */