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 extern const unsigned char pcie_link_speed[];
   8
   9 /* Functions internal to the PCI core code */
  10
  11 int pci_create_sysfs_dev_files(struct pci_dev *pdev);
  12 void pci_remove_sysfs_dev_files(struct pci_dev *pdev);
  13 #if !defined(CONFIG_DMI) && !defined(CONFIG_ACPI)
  14 static inline void pci_create_firmware_label_files(struct pci_dev *pdev)
  15 { return; }
  16 static inline void pci_remove_firmware_label_files(struct pci_dev *pdev)
  17 { return; }
  18 #else
  19 void pci_create_firmware_label_files(struct pci_dev *pdev);
  20 void pci_remove_firmware_label_files(struct pci_dev *pdev);
  21 #endif
  22 void pci_cleanup_rom(struct pci_dev *dev);
  23 #ifdef HAVE_PCI_MMAP
  24 enum pci_mmap_api {
  25         PCI_MMAP_SYSFS, /* mmap on /sys/bus/pci/devices/<BDF>/resource<N> */
  26         PCI_MMAP_PROCFS /* mmap on /proc/bus/pci/<BDF> */
  27 };
  28 int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vmai,
  29                   enum pci_mmap_api mmap_api);
  30 #endif
  31 int pci_probe_reset_function(struct pci_dev *dev);
  32
  33 /**
  34  * struct pci_platform_pm_ops - Firmware PM callbacks
  35  *
  36  * @is_manageable: returns 'true' if given device is power manageable by the
  37  *                 platform firmware
  38  *
  39  * @set_state: invokes the platform firmware to set the device's power state
  40  *
  41  * @choose_state: returns PCI power state of given device preferred by the
  42  *                platform; to be used during system-wide transitions from a
  43  *                sleeping state to the working state and vice versa
  44  *
  45  * @sleep_wake: enables/disables the system wake up capability of given device
  46  *
  47  * @run_wake: enables/disables the platform to generate run-time wake-up events
  48  *              for given device (the device's wake-up capability has to be
  49  *              enabled by @sleep_wake for this feature to work)
  50  *
  51  * If given platform is generally capable of power managing PCI devices, all of
  52  * these callbacks are mandatory.
  53  */
  54 struct pci_platform_pm_ops {
  55         bool (*is_manageable)(struct pci_dev *dev);
  56         int (*set_state)(struct pci_dev *dev, pci_power_t state);
  57         pci_power_t (*choose_state)(struct pci_dev *dev);
  58         int (*sleep_wake)(struct pci_dev *dev, bool enable);
  59         int (*run_wake)(struct pci_dev *dev, bool enable);
  60 };
  61
  62 int pci_set_platform_pm(struct pci_platform_pm_ops *ops);
  63 void pci_update_current_state(struct pci_dev *dev, pci_power_t state);
  64 void pci_power_up(struct pci_dev *dev);
  65 void pci_disable_enabled_device(struct pci_dev *dev);
  66 int pci_finish_runtime_suspend(struct pci_dev *dev);
  67 int __pci_pme_wakeup(struct pci_dev *dev, void *ign);
  68 void pci_config_pm_runtime_get(struct pci_dev *dev);
  69 void pci_config_pm_runtime_put(struct pci_dev *dev);
  70 void pci_pm_init(struct pci_dev *dev);
  71 void pci_allocate_cap_save_buffers(struct pci_dev *dev);
  72 void pci_free_cap_save_buffers(struct pci_dev *dev);
  73
  74 static inline void pci_wakeup_event(struct pci_dev *dev)
  75 {
  76         /* Wait 100 ms before the system can be put into a sleep state. */
  77         pm_wakeup_event(&dev->dev, 100);
  78 }
  79
  80 static inline bool pci_has_subordinate(struct pci_dev *pci_dev)
  81 {
  82         return !!(pci_dev->subordinate);
  83 }
  84
  85 struct pci_vpd_ops {
  86         ssize_t (*read)(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
  87         ssize_t (*write)(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
  88         void (*release)(struct pci_dev *dev);
  89 };
  90
  91 struct pci_vpd {
  92         unsigned int len;
  93         const struct pci_vpd_ops *ops;
  94         struct bin_attribute *attr; /* descriptor for sysfs VPD entry */
  95 };
  96
  97 int pci_vpd_pci22_init(struct pci_dev *dev);
  98 static inline void pci_vpd_release(struct pci_dev *dev)
  99 {
 100         if (dev->vpd)
 101                 dev->vpd->ops->release(dev);
 102 }
 103
 104 /* PCI /proc functions */
 105 #ifdef CONFIG_PROC_FS
 106 int pci_proc_attach_device(struct pci_dev *dev);
 107 int pci_proc_detach_device(struct pci_dev *dev);
 108 int pci_proc_detach_bus(struct pci_bus *bus);
 109 #else
 110 static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; }
 111 static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; }
 112 static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
 113 #endif
 114
 115 /* Functions for PCI Hotplug drivers to use */
 116 int pci_hp_add_bridge(struct pci_dev *dev);
 117
 118 #ifdef HAVE_PCI_LEGACY
 119 void pci_create_legacy_files(struct pci_bus *bus);
 120 void pci_remove_legacy_files(struct pci_bus *bus);
 121 #else
 122 static inline void pci_create_legacy_files(struct pci_bus *bus) { return; }
 123 static inline void pci_remove_legacy_files(struct pci_bus *bus) { return; }
 124 #endif
 125
 126 /* Lock for read/write access to pci device and bus lists */
 127 extern struct rw_semaphore pci_bus_sem;
 128
 129 extern raw_spinlock_t pci_lock;
 130
 131 extern unsigned int pci_pm_d3_delay;
 132
 133 #ifdef CONFIG_PCI_MSI
 134 void pci_no_msi(void);
 135 void pci_msi_init_pci_dev(struct pci_dev *dev);
 136 #else
 137 static inline void pci_no_msi(void) { }
 138 static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { }
 139 #endif
 140
 141 void pci_realloc_get_opt(char *);
 142
 143 static inline int pci_no_d1d2(struct pci_dev *dev)
 144 {
 145         unsigned int parent_dstates = 0;
 146
 147         if (dev->bus->self)
 148                 parent_dstates = dev->bus->self->no_d1d2;
 149         return (dev->no_d1d2 || parent_dstates);
 150
 151 }
 152 extern const struct attribute_group *pci_dev_groups[];
 153 extern const struct attribute_group *pcibus_groups[];
 154 extern struct device_type pci_dev_type;
 155 extern const struct attribute_group *pci_bus_groups[];
 156
 157
 158 /**
 159  * pci_match_one_device - Tell if a PCI device structure has a matching
 160  *                        PCI device id structure
 161  * @id: single PCI device id structure to match
 162  * @dev: the PCI device structure to match against
 163  *
 164  * Returns the matching pci_device_id structure or %NULL if there is no match.
 165  */
 166 static inline const struct pci_device_id *
 167 pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev)
 168 {
 169         if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) &&
 170             (id->device == PCI_ANY_ID || id->device == dev->device) &&
 171             (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) &&
 172             (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) &&
 173             !((id->class ^ dev->class) & id->class_mask))
 174                 return id;
 175         return NULL;
 176 }
 177
 178 /* PCI slot sysfs helper code */
 179 #define to_pci_slot(s) container_of(s, struct pci_slot, kobj)
 180
 181 extern struct kset *pci_slots_kset;
 182
 183 struct pci_slot_attribute {
 184         struct attribute attr;
 185         ssize_t (*show)(struct pci_slot *, char *);
 186         ssize_t (*store)(struct pci_slot *, const char *, size_t);
 187 };
 188 #define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)
 189
 190 enum pci_bar_type {
 191         pci_bar_unknown,        /* Standard PCI BAR probe */
 192         pci_bar_io,             /* An io port BAR */
 193         pci_bar_mem32,          /* A 32-bit memory BAR */
 194         pci_bar_mem64,          /* A 64-bit memory BAR */
 195 };
 196
 197 bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
 198                                 int crs_timeout);
 199 int pci_setup_device(struct pci_dev *dev);
 200 int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
 201                     struct resource *res, unsigned int reg);
 202 int pci_resource_bar(struct pci_dev *dev, int resno, enum pci_bar_type *type);
 203 void pci_configure_ari(struct pci_dev *dev);
 204 void __pci_bus_size_bridges(struct pci_bus *bus,
 205                         struct list_head *realloc_head);
 206 void __pci_bus_assign_resources(const struct pci_bus *bus,
 207                                 struct list_head *realloc_head,
 208                                 struct list_head *fail_head);
 209
 210 /**
 211  * pci_ari_enabled - query ARI forwarding status
 212  * @bus: the PCI bus
 213  *
 214  * Returns 1 if ARI forwarding is enabled, or 0 if not enabled;
 215  */
 216 static inline int pci_ari_enabled(struct pci_bus *bus)
 217 {
 218         return bus->self && bus->self->ari_enabled;
 219 }
 220
 221 void pci_reassigndev_resource_alignment(struct pci_dev *dev);
 222 void pci_disable_bridge_window(struct pci_dev *dev);
 223
 224 /* Single Root I/O Virtualization */
 225 struct pci_sriov {
 226         int pos;                /* capability position */
 227         int nres;               /* number of resources */
 228         u32 cap;                /* SR-IOV Capabilities */
 229         u16 ctrl;               /* SR-IOV Control */
 230         u16 total_VFs;          /* total VFs associated with the PF */
 231         u16 initial_VFs;        /* initial VFs associated with the PF */
 232         u16 num_VFs;            /* number of VFs available */
 233         u16 offset;             /* first VF Routing ID offset */
 234         u16 stride;             /* following VF stride */
 235         u32 pgsz;               /* page size for BAR alignment */
 236         u8 link;                /* Function Dependency Link */
 237         u16 driver_max_VFs;     /* max num VFs driver supports */
 238         struct pci_dev *dev;    /* lowest numbered PF */
 239         struct pci_dev *self;   /* this PF */
 240         struct mutex lock;      /* lock for VF bus */
 241 };
 242
 243 #ifdef CONFIG_PCI_ATS
 244 void pci_restore_ats_state(struct pci_dev *dev);
 245 #else
 246 static inline void pci_restore_ats_state(struct pci_dev *dev)
 247 {
 248 }
 249 #endif /* CONFIG_PCI_ATS */
 250
 251 #ifdef CONFIG_PCI_IOV
 252 int pci_iov_init(struct pci_dev *dev);
 253 void pci_iov_release(struct pci_dev *dev);
 254 int pci_iov_resource_bar(struct pci_dev *dev, int resno,
 255                          enum pci_bar_type *type);
 256 resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno);
 257 void pci_restore_iov_state(struct pci_dev *dev);
 258 int pci_iov_bus_range(struct pci_bus *bus);
 259
 260 #else
 261 static inline int pci_iov_init(struct pci_dev *dev)
 262 {
 263         return -ENODEV;
 264 }
 265 static inline void pci_iov_release(struct pci_dev *dev)
 266
 267 {
 268 }
 269 static inline int pci_iov_resource_bar(struct pci_dev *dev, int resno,
 270                                        enum pci_bar_type *type)
 271 {
 272         return 0;
 273 }
 274 static inline void pci_restore_iov_state(struct pci_dev *dev)
 275 {
 276 }
 277 static inline int pci_iov_bus_range(struct pci_bus *bus)
 278 {
 279         return 0;
 280 }
 281
 282 #endif /* CONFIG_PCI_IOV */
 283
 284 unsigned long pci_cardbus_resource_alignment(struct resource *);
 285
 286 static inline resource_size_t pci_resource_alignment(struct pci_dev *dev,
 287                                                      struct resource *res)
 288 {
 289 #ifdef CONFIG_PCI_IOV
 290         int resno = res - dev->resource;
 291
 292         if (resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END)
 293                 return pci_sriov_resource_alignment(dev, resno);
 294 #endif
 295         if (dev->class >> 8  == PCI_CLASS_BRIDGE_CARDBUS)
 296                 return pci_cardbus_resource_alignment(res);
 297         return resource_alignment(res);
 298 }
 299
 300 void pci_enable_acs(struct pci_dev *dev);
 301
 302 struct pci_dev_reset_methods {
 303         u16 vendor;
 304         u16 device;
 305         int (*reset)(struct pci_dev *dev, int probe);
 306 };
 307
 308 #ifdef CONFIG_PCI_QUIRKS
 309 int pci_dev_specific_reset(struct pci_dev *dev, int probe);
 310 #else
 311 static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe)
 312 {
 313         return -ENOTTY;
 314 }
 315 #endif
 316
 317 #endif /* DRIVERS_PCI_H */