drivers/pci/pci.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef DRIVERS_PCI_H
   3 #define DRIVERS_PCI_H
   4
   5 #include <linux/pci.h>
   6
   7 #define PCI_FIND_CAP_TTL        48
   8
   9 #define PCI_VSEC_ID_INTEL_TBT   0x1234  /* Thunderbolt */
  10
  11 extern const unsigned char pcie_link_speed[];
  12 extern bool pci_early_dump;
  13
  14 bool pcie_cap_has_lnkctl(const struct pci_dev *dev);
  15
  16 /* Functions internal to the PCI core code */
  17
  18 int pci_create_sysfs_dev_files(struct pci_dev *pdev);
  19 void pci_remove_sysfs_dev_files(struct pci_dev *pdev);
  20 #if !defined(CONFIG_DMI) && !defined(CONFIG_ACPI)
  21 static inline void pci_create_firmware_label_files(struct pci_dev *pdev)
  22 { return; }
  23 static inline void pci_remove_firmware_label_files(struct pci_dev *pdev)
  24 { return; }
  25 #else
  26 void pci_create_firmware_label_files(struct pci_dev *pdev);
  27 void pci_remove_firmware_label_files(struct pci_dev *pdev);
  28 #endif
  29 void pci_cleanup_rom(struct pci_dev *dev);
  30
  31 enum pci_mmap_api {
  32         PCI_MMAP_SYSFS, /* mmap on /sys/bus/pci/devices/<BDF>/resource<N> */
  33         PCI_MMAP_PROCFS /* mmap on /proc/bus/pci/<BDF> */
  34 };
  35 int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vmai,
  36                   enum pci_mmap_api mmap_api);
  37
  38 int pci_probe_reset_function(struct pci_dev *dev);
  39 int pci_bridge_secondary_bus_reset(struct pci_dev *dev);
  40 int pci_bus_error_reset(struct pci_dev *dev);
  41
  42 #define PCI_PM_D2_DELAY         200
  43 #define PCI_PM_D3_WAIT          10
  44 #define PCI_PM_D3COLD_WAIT      100
  45 #define PCI_PM_BUS_WAIT         50
  46
  47 /**
  48  * struct pci_platform_pm_ops - Firmware PM callbacks
  49  *
  50  * @bridge_d3: Does the bridge allow entering into D3
  51  *
  52  * @is_manageable: returns 'true' if given device is power manageable by the
  53  *                 platform firmware
  54  *
  55  * @set_state: invokes the platform firmware to set the device's power state
  56  *
  57  * @get_state: queries the platform firmware for a device's current power state
  58  *
  59  * @refresh_state: asks the platform to refresh the device's power state data
  60  *
  61  * @choose_state: returns PCI power state of given device preferred by the
  62  *                platform; to be used during system-wide transitions from a
  63  *                sleeping state to the working state and vice versa
  64  *
  65  * @set_wakeup: enables/disables wakeup capability for the device
  66  *
  67  * @need_resume: returns 'true' if the given device (which is currently
  68  *               suspended) needs to be resumed to be configured for system
  69  *               wakeup.
  70  *
  71  * If given platform is generally capable of power managing PCI devices, all of
  72  * these callbacks are mandatory.
  73  */
  74 struct pci_platform_pm_ops {
  75         bool (*bridge_d3)(struct pci_dev *dev);
  76         bool (*is_manageable)(struct pci_dev *dev);
  77         int (*set_state)(struct pci_dev *dev, pci_power_t state);
  78         pci_power_t (*get_state)(struct pci_dev *dev);
  79         void (*refresh_state)(struct pci_dev *dev);
  80         pci_power_t (*choose_state)(struct pci_dev *dev);
  81         int (*set_wakeup)(struct pci_dev *dev, bool enable);
  82         bool (*need_resume)(struct pci_dev *dev);
  83 };
  84
  85 int pci_set_platform_pm(const struct pci_platform_pm_ops *ops);
  86 void pci_update_current_state(struct pci_dev *dev, pci_power_t state);
  87 void pci_refresh_power_state(struct pci_dev *dev);
  88 void pci_power_up(struct pci_dev *dev);
  89 void pci_disable_enabled_device(struct pci_dev *dev);
  90 int pci_finish_runtime_suspend(struct pci_dev *dev);
  91 void pcie_clear_root_pme_status(struct pci_dev *dev);
  92 bool pci_check_pme_status(struct pci_dev *dev);
  93 void pci_pme_wakeup_bus(struct pci_bus *bus);
  94 int __pci_pme_wakeup(struct pci_dev *dev, void *ign);
  95 void pci_pme_restore(struct pci_dev *dev);
  96 bool pci_dev_need_resume(struct pci_dev *dev);
  97 void pci_dev_adjust_pme(struct pci_dev *dev);
  98 void pci_dev_complete_resume(struct pci_dev *pci_dev);
  99 void pci_config_pm_runtime_get(struct pci_dev *dev);
 100 void pci_config_pm_runtime_put(struct pci_dev *dev);
 101 void pci_pm_init(struct pci_dev *dev);
 102 void pci_ea_init(struct pci_dev *dev);
 103 void pci_allocate_cap_save_buffers(struct pci_dev *dev);
 104 void pci_free_cap_save_buffers(struct pci_dev *dev);
 105 bool pci_bridge_d3_possible(struct pci_dev *dev);
 106 void pci_bridge_d3_update(struct pci_dev *dev);
 107
 108 static inline void pci_wakeup_event(struct pci_dev *dev)
 109 {
 110         /* Wait 100 ms before the system can be put into a sleep state. */
 111         pm_wakeup_event(&dev->dev, 100);
 112 }
 113
 114 static inline bool pci_has_subordinate(struct pci_dev *pci_dev)
 115 {
 116         return !!(pci_dev->subordinate);
 117 }
 118
 119 static inline bool pci_power_manageable(struct pci_dev *pci_dev)
 120 {
 121         /*
 122          * Currently we allow normal PCI devices and PCI bridges transition
 123          * into D3 if their bridge_d3 is set.
 124          */
 125         return !pci_has_subordinate(pci_dev) || pci_dev->bridge_d3;
 126 }
 127
 128 static inline bool pcie_downstream_port(const struct pci_dev *dev)
 129 {
 130         int type = pci_pcie_type(dev);
 131
 132         return type == PCI_EXP_TYPE_ROOT_PORT ||
 133                type == PCI_EXP_TYPE_DOWNSTREAM ||
 134                type == PCI_EXP_TYPE_PCIE_BRIDGE;
 135 }
 136
 137 int pci_vpd_init(struct pci_dev *dev);
 138 void pci_vpd_release(struct pci_dev *dev);
 139 void pcie_vpd_create_sysfs_dev_files(struct pci_dev *dev);
 140 void pcie_vpd_remove_sysfs_dev_files(struct pci_dev *dev);
 141
 142 /* PCI Virtual Channel */
 143 int pci_save_vc_state(struct pci_dev *dev);
 144 void pci_restore_vc_state(struct pci_dev *dev);
 145 void pci_allocate_vc_save_buffers(struct pci_dev *dev);
 146
 147 /* PCI /proc functions */
 148 #ifdef CONFIG_PROC_FS
 149 int pci_proc_attach_device(struct pci_dev *dev);
 150 int pci_proc_detach_device(struct pci_dev *dev);
 151 int pci_proc_detach_bus(struct pci_bus *bus);
 152 #else
 153 static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; }
 154 static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; }
 155 static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
 156 #endif
 157
 158 /* Functions for PCI Hotplug drivers to use */
 159 int pci_hp_add_bridge(struct pci_dev *dev);
 160
 161 #ifdef HAVE_PCI_LEGACY
 162 void pci_create_legacy_files(struct pci_bus *bus);
 163 void pci_remove_legacy_files(struct pci_bus *bus);
 164 #else
 165 static inline void pci_create_legacy_files(struct pci_bus *bus) { return; }
 166 static inline void pci_remove_legacy_files(struct pci_bus *bus) { return; }
 167 #endif
 168
 169 /* Lock for read/write access to pci device and bus lists */
 170 extern struct rw_semaphore pci_bus_sem;
 171 extern struct mutex pci_slot_mutex;
 172
 173 extern raw_spinlock_t pci_lock;
 174
 175 extern unsigned int pci_pm_d3_delay;
 176
 177 #ifdef CONFIG_PCI_MSI
 178 void pci_no_msi(void);
 179 #else
 180 static inline void pci_no_msi(void) { }
 181 #endif
 182
 183 static inline void pci_msi_set_enable(struct pci_dev *dev, int enable)
 184 {
 185         u16 control;
 186
 187         pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &control);
 188         control &= ~PCI_MSI_FLAGS_ENABLE;
 189         if (enable)
 190                 control |= PCI_MSI_FLAGS_ENABLE;
 191         pci_write_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, control);
 192 }
 193
 194 static inline void pci_msix_clear_and_set_ctrl(struct pci_dev *dev, u16 clear, u16 set)
 195 {
 196         u16 ctrl;
 197
 198         pci_read_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, &ctrl);
 199         ctrl &= ~clear;
 200         ctrl |= set;
 201         pci_write_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, ctrl);
 202 }
 203
 204 void pci_realloc_get_opt(char *);
 205
 206 static inline int pci_no_d1d2(struct pci_dev *dev)
 207 {
 208         unsigned int parent_dstates = 0;
 209
 210         if (dev->bus->self)
 211                 parent_dstates = dev->bus->self->no_d1d2;
 212         return (dev->no_d1d2 || parent_dstates);
 213
 214 }
 215 extern const struct attribute_group *pci_dev_groups[];
 216 extern const struct attribute_group *pcibus_groups[];
 217 extern const struct device_type pci_dev_type;
 218 extern const struct attribute_group *pci_bus_groups[];
 219
 220 extern unsigned long pci_hotplug_io_size;
 221 extern unsigned long pci_hotplug_mem_size;
 222 extern unsigned long pci_hotplug_bus_size;
 223
 224 /**
 225  * pci_match_one_device - Tell if a PCI device structure has a matching
 226  *                        PCI device id structure
 227  * @id: single PCI device id structure to match
 228  * @dev: the PCI device structure to match against
 229  *
 230  * Returns the matching pci_device_id structure or %NULL if there is no match.
 231  */
 232 static inline const struct pci_device_id *
 233 pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev)
 234 {
 235         if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) &&
 236             (id->device == PCI_ANY_ID || id->device == dev->device) &&
 237             (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) &&
 238             (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) &&
 239             !((id->class ^ dev->class) & id->class_mask))
 240                 return id;
 241         return NULL;
 242 }
 243
 244 /* PCI slot sysfs helper code */
 245 #define to_pci_slot(s) container_of(s, struct pci_slot, kobj)
 246
 247 extern struct kset *pci_slots_kset;
 248
 249 struct pci_slot_attribute {
 250         struct attribute attr;
 251         ssize_t (*show)(struct pci_slot *, char *);
 252         ssize_t (*store)(struct pci_slot *, const char *, size_t);
 253 };
 254 #define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)
 255
 256 enum pci_bar_type {
 257         pci_bar_unknown,        /* Standard PCI BAR probe */
 258         pci_bar_io,             /* An I/O port BAR */
 259         pci_bar_mem32,          /* A 32-bit memory BAR */
 260         pci_bar_mem64,          /* A 64-bit memory BAR */
 261 };
 262
 263 struct device *pci_get_host_bridge_device(struct pci_dev *dev);
 264 void pci_put_host_bridge_device(struct device *dev);
 265
 266 int pci_configure_extended_tags(struct pci_dev *dev, void *ign);
 267 bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
 268                                 int crs_timeout);
 269 bool pci_bus_generic_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
 270                                         int crs_timeout);
 271 int pci_idt_bus_quirk(struct pci_bus *bus, int devfn, u32 *pl, int crs_timeout);
 272
 273 int pci_setup_device(struct pci_dev *dev);
 274 int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
 275                     struct resource *res, unsigned int reg);
 276 void pci_configure_ari(struct pci_dev *dev);
 277 void __pci_bus_size_bridges(struct pci_bus *bus,
 278                         struct list_head *realloc_head);
 279 void __pci_bus_assign_resources(const struct pci_bus *bus,
 280                                 struct list_head *realloc_head,
 281                                 struct list_head *fail_head);
 282 bool pci_bus_clip_resource(struct pci_dev *dev, int idx);
 283
 284 void pci_reassigndev_resource_alignment(struct pci_dev *dev);
 285 void pci_disable_bridge_window(struct pci_dev *dev);
 286 struct pci_bus *pci_bus_get(struct pci_bus *bus);
 287 void pci_bus_put(struct pci_bus *bus);
 288
 289 /* PCIe link information */
 290 #define PCIE_SPEED2STR(speed) \
 291         ((speed) == PCIE_SPEED_16_0GT ? "16 GT/s" : \
 292          (speed) == PCIE_SPEED_8_0GT ? "8 GT/s" : \
 293          (speed) == PCIE_SPEED_5_0GT ? "5 GT/s" : \
 294          (speed) == PCIE_SPEED_2_5GT ? "2.5 GT/s" : \
 295          "Unknown speed")
 296
 297 /* PCIe speed to Mb/s reduced by encoding overhead */
 298 #define PCIE_SPEED2MBS_ENC(speed) \
 299         ((speed) == PCIE_SPEED_16_0GT ? 16000*128/130 : \
 300          (speed) == PCIE_SPEED_8_0GT  ?  8000*128/130 : \
 301          (speed) == PCIE_SPEED_5_0GT  ?  5000*8/10 : \
 302          (speed) == PCIE_SPEED_2_5GT  ?  2500*8/10 : \
 303          0)
 304
 305 enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev);
 306 enum pcie_link_width pcie_get_width_cap(struct pci_dev *dev);
 307 u32 pcie_bandwidth_capable(struct pci_dev *dev, enum pci_bus_speed *speed,
 308                            enum pcie_link_width *width);
 309 void __pcie_print_link_status(struct pci_dev *dev, bool verbose);
 310 void pcie_report_downtraining(struct pci_dev *dev);
 311 void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
 312
 313 /* Single Root I/O Virtualization */
 314 struct pci_sriov {
 315         int             pos;            /* Capability position */
 316         int             nres;           /* Number of resources */
 317         u32             cap;            /* SR-IOV Capabilities */
 318         u16             ctrl;           /* SR-IOV Control */
 319         u16             total_VFs;      /* Total VFs associated with the PF */
 320         u16             initial_VFs;    /* Initial VFs associated with the PF */
 321         u16             num_VFs;        /* Number of VFs available */
 322         u16             offset;         /* First VF Routing ID offset */
 323         u16             stride;         /* Following VF stride */
 324         u16             vf_device;      /* VF device ID */
 325         u32             pgsz;           /* Page size for BAR alignment */
 326         u8              link;           /* Function Dependency Link */
 327         u8              max_VF_buses;   /* Max buses consumed by VFs */
 328         u16             driver_max_VFs; /* Max num VFs driver supports */
 329         struct pci_dev  *dev;           /* Lowest numbered PF */
 330         struct pci_dev  *self;          /* This PF */
 331         u32             class;          /* VF device */
 332         u8              hdr_type;       /* VF header type */
 333         u16             subsystem_vendor; /* VF subsystem vendor */
 334         u16             subsystem_device; /* VF subsystem device */
 335         resource_size_t barsz[PCI_SRIOV_NUM_BARS];      /* VF BAR size */
 336         bool            drivers_autoprobe; /* Auto probing of VFs by driver */
 337 };
 338
 339 /**
 340  * pci_dev_set_io_state - Set the new error state if possible.
 341  *
 342  * @dev - pci device to set new error_state
 343  * @new - the state we want dev to be in
 344  *
 345  * Must be called with device_lock held.
 346  *
 347  * Returns true if state has been changed to the requested state.
 348  */
 349 static inline bool pci_dev_set_io_state(struct pci_dev *dev,
 350                                         pci_channel_state_t new)
 351 {
 352         bool changed = false;
 353
 354         device_lock_assert(&dev->dev);
 355         switch (new) {
 356         case pci_channel_io_perm_failure:
 357                 switch (dev->error_state) {
 358                 case pci_channel_io_frozen:
 359                 case pci_channel_io_normal:
 360                 case pci_channel_io_perm_failure:
 361                         changed = true;
 362                         break;
 363                 }
 364                 break;
 365         case pci_channel_io_frozen:
 366                 switch (dev->error_state) {
 367                 case pci_channel_io_frozen:
 368                 case pci_channel_io_normal:
 369                         changed = true;
 370                         break;
 371                 }
 372                 break;
 373         case pci_channel_io_normal:
 374                 switch (dev->error_state) {
 375                 case pci_channel_io_frozen:
 376                 case pci_channel_io_normal:
 377                         changed = true;
 378                         break;
 379                 }
 380                 break;
 381         }
 382         if (changed)
 383                 dev->error_state = new;
 384         return changed;
 385 }
 386
 387 static inline int pci_dev_set_disconnected(struct pci_dev *dev, void *unused)
 388 {
 389         device_lock(&dev->dev);
 390         pci_dev_set_io_state(dev, pci_channel_io_perm_failure);
 391         device_unlock(&dev->dev);
 392
 393         return 0;
 394 }
 395
 396 static inline bool pci_dev_is_disconnected(const struct pci_dev *dev)
 397 {
 398         return dev->error_state == pci_channel_io_perm_failure;
 399 }
 400
 401 /* pci_dev priv_flags */
 402 #define PCI_DEV_ADDED 0
 403
 404 static inline void pci_dev_assign_added(struct pci_dev *dev, bool added)
 405 {
 406         assign_bit(PCI_DEV_ADDED, &dev->priv_flags, added);
 407 }
 408
 409 static inline bool pci_dev_is_added(const struct pci_dev *dev)
 410 {
 411         return test_bit(PCI_DEV_ADDED, &dev->priv_flags);
 412 }
 413
 414 #ifdef CONFIG_PCIEAER
 415 #include <linux/aer.h>
 416
 417 #define AER_MAX_MULTI_ERR_DEVICES       5       /* Not likely to have more */
 418
 419 struct aer_err_info {
 420         struct pci_dev *dev[AER_MAX_MULTI_ERR_DEVICES];
 421         int error_dev_num;
 422
 423         unsigned int id:16;
 424
 425         unsigned int severity:2;        /* 0:NONFATAL | 1:FATAL | 2:COR */
 426         unsigned int __pad1:5;
 427         unsigned int multi_error_valid:1;
 428
 429         unsigned int first_error:5;
 430         unsigned int __pad2:2;
 431         unsigned int tlp_header_valid:1;
 432
 433         unsigned int status;            /* COR/UNCOR Error Status */
 434         unsigned int mask;              /* COR/UNCOR Error Mask */
 435         struct aer_header_log_regs tlp; /* TLP Header */
 436 };
 437
 438 int aer_get_device_error_info(struct pci_dev *dev, struct aer_err_info *info);
 439 void aer_print_error(struct pci_dev *dev, struct aer_err_info *info);
 440 #endif  /* CONFIG_PCIEAER */
 441
 442 #ifdef CONFIG_PCIE_DPC
 443 void pci_save_dpc_state(struct pci_dev *dev);
 444 void pci_restore_dpc_state(struct pci_dev *dev);
 445 #else
 446 static inline void pci_save_dpc_state(struct pci_dev *dev) {}
 447 static inline void pci_restore_dpc_state(struct pci_dev *dev) {}
 448 #endif
 449
 450 #ifdef CONFIG_PCI_ATS
 451 /* Address Translation Service */
 452 void pci_ats_init(struct pci_dev *dev);
 453 void pci_restore_ats_state(struct pci_dev *dev);
 454 #else
 455 static inline void pci_ats_init(struct pci_dev *d) { }
 456 static inline void pci_restore_ats_state(struct pci_dev *dev) { }
 457 #endif /* CONFIG_PCI_ATS */
 458
 459 #ifdef CONFIG_PCI_IOV
 460 int pci_iov_init(struct pci_dev *dev);
 461 void pci_iov_release(struct pci_dev *dev);
 462 void pci_iov_remove(struct pci_dev *dev);
 463 void pci_iov_update_resource(struct pci_dev *dev, int resno);
 464 resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno);
 465 void pci_restore_iov_state(struct pci_dev *dev);
 466 int pci_iov_bus_range(struct pci_bus *bus);
 467 extern const struct attribute_group sriov_dev_attr_group;
 468 #else
 469 static inline int pci_iov_init(struct pci_dev *dev)
 470 {
 471         return -ENODEV;
 472 }
 473 static inline void pci_iov_release(struct pci_dev *dev)
 474
 475 {
 476 }
 477 static inline void pci_iov_remove(struct pci_dev *dev)
 478 {
 479 }
 480 static inline void pci_restore_iov_state(struct pci_dev *dev)
 481 {
 482 }
 483 static inline int pci_iov_bus_range(struct pci_bus *bus)
 484 {
 485         return 0;
 486 }
 487
 488 #endif /* CONFIG_PCI_IOV */
 489
 490 unsigned long pci_cardbus_resource_alignment(struct resource *);
 491
 492 static inline resource_size_t pci_resource_alignment(struct pci_dev *dev,
 493                                                      struct resource *res)
 494 {
 495 #ifdef CONFIG_PCI_IOV
 496         int resno = res - dev->resource;
 497
 498         if (resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END)
 499                 return pci_sriov_resource_alignment(dev, resno);
 500 #endif
 501         if (dev->class >> 8 == PCI_CLASS_BRIDGE_CARDBUS)
 502                 return pci_cardbus_resource_alignment(res);
 503         return resource_alignment(res);
 504 }
 505
 506 void pci_enable_acs(struct pci_dev *dev);
 507 #ifdef CONFIG_PCI_QUIRKS
 508 int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags);
 509 int pci_dev_specific_enable_acs(struct pci_dev *dev);
 510 int pci_dev_specific_disable_acs_redir(struct pci_dev *dev);
 511 #else
 512 static inline int pci_dev_specific_acs_enabled(struct pci_dev *dev,
 513                                                u16 acs_flags)
 514 {
 515         return -ENOTTY;
 516 }
 517 static inline int pci_dev_specific_enable_acs(struct pci_dev *dev)
 518 {
 519         return -ENOTTY;
 520 }
 521 static inline int pci_dev_specific_disable_acs_redir(struct pci_dev *dev)
 522 {
 523         return -ENOTTY;
 524 }
 525 #endif
 526
 527 /* PCI error reporting and recovery */
 528 void pcie_do_recovery(struct pci_dev *dev, enum pci_channel_state state,
 529                       u32 service);
 530
 531 bool pcie_wait_for_link(struct pci_dev *pdev, bool active);
 532 #ifdef CONFIG_PCIEASPM
 533 void pcie_aspm_init_link_state(struct pci_dev *pdev);
 534 void pcie_aspm_exit_link_state(struct pci_dev *pdev);
 535 void pcie_aspm_pm_state_change(struct pci_dev *pdev);
 536 void pcie_aspm_powersave_config_link(struct pci_dev *pdev);
 537 #else
 538 static inline void pcie_aspm_init_link_state(struct pci_dev *pdev) { }
 539 static inline void pcie_aspm_exit_link_state(struct pci_dev *pdev) { }
 540 static inline void pcie_aspm_pm_state_change(struct pci_dev *pdev) { }
 541 static inline void pcie_aspm_powersave_config_link(struct pci_dev *pdev) { }
 542 #endif
 543
 544 #ifdef CONFIG_PCIEASPM_DEBUG
 545 void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev);
 546 void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev);
 547 #else
 548 static inline void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev) { }
 549 static inline void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev) { }
 550 #endif
 551
 552 #ifdef CONFIG_PCIE_ECRC
 553 void pcie_set_ecrc_checking(struct pci_dev *dev);
 554 void pcie_ecrc_get_policy(char *str);
 555 #else
 556 static inline void pcie_set_ecrc_checking(struct pci_dev *dev) { }
 557 static inline void pcie_ecrc_get_policy(char *str) { }
 558 #endif
 559
 560 #ifdef CONFIG_PCIE_PTM
 561 void pci_ptm_init(struct pci_dev *dev);
 562 int pci_enable_ptm(struct pci_dev *dev, u8 *granularity);
 563 #else
 564 static inline void pci_ptm_init(struct pci_dev *dev) { }
 565 static inline int pci_enable_ptm(struct pci_dev *dev, u8 *granularity)
 566 { return -EINVAL; }
 567 #endif
 568
 569 struct pci_dev_reset_methods {
 570         u16 vendor;
 571         u16 device;
 572         int (*reset)(struct pci_dev *dev, int probe);
 573 };
 574
 575 #ifdef CONFIG_PCI_QUIRKS
 576 int pci_dev_specific_reset(struct pci_dev *dev, int probe);
 577 #else
 578 static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe)
 579 {
 580         return -ENOTTY;
 581 }
 582 #endif
 583
 584 #if defined(CONFIG_PCI_QUIRKS) && defined(CONFIG_ARM64)
 585 int acpi_get_rc_resources(struct device *dev, const char *hid, u16 segment,
 586                           struct resource *res);
 587 #endif
 588
 589 u32 pci_rebar_get_possible_sizes(struct pci_dev *pdev, int bar);
 590 int pci_rebar_get_current_size(struct pci_dev *pdev, int bar);
 591 int pci_rebar_set_size(struct pci_dev *pdev, int bar, int size);
 592 static inline u64 pci_rebar_size_to_bytes(int size)
 593 {
 594         return 1ULL << (size + 20);
 595 }
 596
 597 struct device_node;
 598
 599 #ifdef CONFIG_OF
 600 int of_pci_parse_bus_range(struct device_node *node, struct resource *res);
 601 int of_get_pci_domain_nr(struct device_node *node);
 602 int of_pci_get_max_link_speed(struct device_node *node);
 603 void pci_set_of_node(struct pci_dev *dev);
 604 void pci_release_of_node(struct pci_dev *dev);
 605 void pci_set_bus_of_node(struct pci_bus *bus);
 606 void pci_release_bus_of_node(struct pci_bus *bus);
 607
 608 #else
 609 static inline int
 610 of_pci_parse_bus_range(struct device_node *node, struct resource *res)
 611 {
 612         return -EINVAL;
 613 }
 614
 615 static inline int
 616 of_get_pci_domain_nr(struct device_node *node)
 617 {
 618         return -1;
 619 }
 620
 621 static inline int
 622 of_pci_get_max_link_speed(struct device_node *node)
 623 {
 624         return -EINVAL;
 625 }
 626
 627 static inline void pci_set_of_node(struct pci_dev *dev) { }
 628 static inline void pci_release_of_node(struct pci_dev *dev) { }
 629 static inline void pci_set_bus_of_node(struct pci_bus *bus) { }
 630 static inline void pci_release_bus_of_node(struct pci_bus *bus) { }
 631 #endif /* CONFIG_OF */
 632
 633 #if defined(CONFIG_OF_ADDRESS)
 634 int devm_of_pci_get_host_bridge_resources(struct device *dev,
 635                         unsigned char busno, unsigned char bus_max,
 636                         struct list_head *resources, resource_size_t *io_base);
 637 #else
 638 static inline int devm_of_pci_get_host_bridge_resources(struct device *dev,
 639                         unsigned char busno, unsigned char bus_max,
 640                         struct list_head *resources, resource_size_t *io_base)
 641 {
 642         return -EINVAL;
 643 }
 644 #endif
 645
 646 #ifdef CONFIG_PCIEAER
 647 void pci_no_aer(void);
 648 void pci_aer_init(struct pci_dev *dev);
 649 void pci_aer_exit(struct pci_dev *dev);
 650 extern const struct attribute_group aer_stats_attr_group;
 651 void pci_aer_clear_fatal_status(struct pci_dev *dev);
 652 void pci_aer_clear_device_status(struct pci_dev *dev);
 653 #else
 654 static inline void pci_no_aer(void) { }
 655 static inline void pci_aer_init(struct pci_dev *d) { }
 656 static inline void pci_aer_exit(struct pci_dev *d) { }
 657 static inline void pci_aer_clear_fatal_status(struct pci_dev *dev) { }
 658 static inline void pci_aer_clear_device_status(struct pci_dev *dev) { }
 659 #endif
 660
 661 #ifdef CONFIG_ACPI
 662 int pci_acpi_program_hp_params(struct pci_dev *dev);
 663 #else
 664 static inline int pci_acpi_program_hp_params(struct pci_dev *dev)
 665 {
 666         return -ENODEV;
 667 }
 668 #endif
 669
 670 #endif /* DRIVERS_PCI_H */