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 /* Number of possible devfns: 0.0 to 1f.7 inclusive */ 8 #define MAX_NR_DEVFNS 256 9 10 #define PCI_FIND_CAP_TTL 48 11 12 #define PCI_VSEC_ID_INTEL_TBT 0x1234 /* Thunderbolt */ 13 14 extern const unsigned char pcie_link_speed[]; 15 extern bool pci_early_dump; 16 17 bool pcie_cap_has_lnkctl(const struct pci_dev *dev); 18 bool pcie_cap_has_rtctl(const struct pci_dev *dev); 19 20 /* Functions internal to the PCI core code */ 21 22 int pci_create_sysfs_dev_files(struct pci_dev *pdev); 23 void pci_remove_sysfs_dev_files(struct pci_dev *pdev); 24 void pci_cleanup_rom(struct pci_dev *dev); 25 #ifdef CONFIG_DMI 26 extern const struct attribute_group pci_dev_smbios_attr_group; 27 #endif 28 29 enum pci_mmap_api { 30 PCI_MMAP_SYSFS, /* mmap on /sys/bus/pci/devices/<BDF>/resource<N> */ 31 PCI_MMAP_PROCFS /* mmap on /proc/bus/pci/<BDF> */ 32 }; 33 int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vmai, 34 enum pci_mmap_api mmap_api); 35 36 bool pci_reset_supported(struct pci_dev *dev); 37 void pci_init_reset_methods(struct pci_dev *dev); 38 int pci_bridge_secondary_bus_reset(struct pci_dev *dev); 39 int pci_bus_error_reset(struct pci_dev *dev); 40 41 struct pci_cap_saved_data { 42 u16 cap_nr; 43 bool cap_extended; 44 unsigned int size; 45 u32 data[]; 46 }; 47 48 struct pci_cap_saved_state { 49 struct hlist_node next; 50 struct pci_cap_saved_data cap; 51 }; 52 53 void pci_allocate_cap_save_buffers(struct pci_dev *dev); 54 void pci_free_cap_save_buffers(struct pci_dev *dev); 55 int pci_add_cap_save_buffer(struct pci_dev *dev, char cap, unsigned int size); 56 int pci_add_ext_cap_save_buffer(struct pci_dev *dev, 57 u16 cap, unsigned int size); 58 struct pci_cap_saved_state *pci_find_saved_cap(struct pci_dev *dev, char cap); 59 struct pci_cap_saved_state *pci_find_saved_ext_cap(struct pci_dev *dev, 60 u16 cap); 61 62 #define PCI_PM_D2_DELAY 200 /* usec; see PCIe r4.0, sec 5.9.1 */ 63 #define PCI_PM_D3HOT_WAIT 10 /* msec */ 64 #define PCI_PM_D3COLD_WAIT 100 /* msec */ 65 66 void pci_update_current_state(struct pci_dev *dev, pci_power_t state); 67 void pci_refresh_power_state(struct pci_dev *dev); 68 int pci_power_up(struct pci_dev *dev); 69 void pci_disable_enabled_device(struct pci_dev *dev); 70 int pci_finish_runtime_suspend(struct pci_dev *dev); 71 void pcie_clear_device_status(struct pci_dev *dev); 72 void pcie_clear_root_pme_status(struct pci_dev *dev); 73 bool pci_check_pme_status(struct pci_dev *dev); 74 void pci_pme_wakeup_bus(struct pci_bus *bus); 75 int __pci_pme_wakeup(struct pci_dev *dev, void *ign); 76 void pci_pme_restore(struct pci_dev *dev); 77 bool pci_dev_need_resume(struct pci_dev *dev); 78 void pci_dev_adjust_pme(struct pci_dev *dev); 79 void pci_dev_complete_resume(struct pci_dev *pci_dev); 80 void pci_config_pm_runtime_get(struct pci_dev *dev); 81 void pci_config_pm_runtime_put(struct pci_dev *dev); 82 void pci_pm_init(struct pci_dev *dev); 83 void pci_ea_init(struct pci_dev *dev); 84 void pci_msi_init(struct pci_dev *dev); 85 void pci_msix_init(struct pci_dev *dev); 86 bool pci_bridge_d3_possible(struct pci_dev *dev); 87 void pci_bridge_d3_update(struct pci_dev *dev); 88 void pci_bridge_wait_for_secondary_bus(struct pci_dev *dev); 89 void pci_bridge_reconfigure_ltr(struct pci_dev *dev); 90 91 static inline void pci_wakeup_event(struct pci_dev *dev) 92 { 93 /* Wait 100 ms before the system can be put into a sleep state. */ 94 pm_wakeup_event(&dev->dev, 100); 95 } 96 97 static inline bool pci_has_subordinate(struct pci_dev *pci_dev) 98 { 99 return !!(pci_dev->subordinate); 100 } 101 102 static inline bool pci_power_manageable(struct pci_dev *pci_dev) 103 { 104 /* 105 * Currently we allow normal PCI devices and PCI bridges transition 106 * into D3 if their bridge_d3 is set. 107 */ 108 return !pci_has_subordinate(pci_dev) || pci_dev->bridge_d3; 109 } 110 111 static inline bool pcie_downstream_port(const struct pci_dev *dev) 112 { 113 int type = pci_pcie_type(dev); 114 115 return type == PCI_EXP_TYPE_ROOT_PORT || 116 type == PCI_EXP_TYPE_DOWNSTREAM || 117 type == PCI_EXP_TYPE_PCIE_BRIDGE; 118 } 119 120 void pci_vpd_init(struct pci_dev *dev); 121 void pci_vpd_release(struct pci_dev *dev); 122 extern const struct attribute_group pci_dev_vpd_attr_group; 123 124 /* PCI Virtual Channel */ 125 int pci_save_vc_state(struct pci_dev *dev); 126 void pci_restore_vc_state(struct pci_dev *dev); 127 void pci_allocate_vc_save_buffers(struct pci_dev *dev); 128 129 /* PCI /proc functions */ 130 #ifdef CONFIG_PROC_FS 131 int pci_proc_attach_device(struct pci_dev *dev); 132 int pci_proc_detach_device(struct pci_dev *dev); 133 int pci_proc_detach_bus(struct pci_bus *bus); 134 #else 135 static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; } 136 static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; } 137 static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; } 138 #endif 139 140 /* Functions for PCI Hotplug drivers to use */ 141 int pci_hp_add_bridge(struct pci_dev *dev); 142 143 #ifdef HAVE_PCI_LEGACY 144 void pci_create_legacy_files(struct pci_bus *bus); 145 void pci_remove_legacy_files(struct pci_bus *bus); 146 #else 147 static inline void pci_create_legacy_files(struct pci_bus *bus) { return; } 148 static inline void pci_remove_legacy_files(struct pci_bus *bus) { return; } 149 #endif 150 151 /* Lock for read/write access to pci device and bus lists */ 152 extern struct rw_semaphore pci_bus_sem; 153 extern struct mutex pci_slot_mutex; 154 155 extern raw_spinlock_t pci_lock; 156 157 extern unsigned int pci_pm_d3hot_delay; 158 159 #ifdef CONFIG_PCI_MSI 160 void pci_no_msi(void); 161 #else 162 static inline void pci_no_msi(void) { } 163 #endif 164 165 void pci_realloc_get_opt(char *); 166 167 static inline int pci_no_d1d2(struct pci_dev *dev) 168 { 169 unsigned int parent_dstates = 0; 170 171 if (dev->bus->self) 172 parent_dstates = dev->bus->self->no_d1d2; 173 return (dev->no_d1d2 || parent_dstates); 174 175 } 176 extern const struct attribute_group *pci_dev_groups[]; 177 extern const struct attribute_group *pcibus_groups[]; 178 extern const struct device_type pci_dev_type; 179 extern const struct attribute_group *pci_bus_groups[]; 180 181 extern unsigned long pci_hotplug_io_size; 182 extern unsigned long pci_hotplug_mmio_size; 183 extern unsigned long pci_hotplug_mmio_pref_size; 184 extern unsigned long pci_hotplug_bus_size; 185 186 /** 187 * pci_match_one_device - Tell if a PCI device structure has a matching 188 * PCI device id structure 189 * @id: single PCI device id structure to match 190 * @dev: the PCI device structure to match against 191 * 192 * Returns the matching pci_device_id structure or %NULL if there is no match. 193 */ 194 static inline const struct pci_device_id * 195 pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev) 196 { 197 if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) && 198 (id->device == PCI_ANY_ID || id->device == dev->device) && 199 (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) && 200 (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) && 201 !((id->class ^ dev->class) & id->class_mask)) 202 return id; 203 return NULL; 204 } 205 206 /* PCI slot sysfs helper code */ 207 #define to_pci_slot(s) container_of(s, struct pci_slot, kobj) 208 209 extern struct kset *pci_slots_kset; 210 211 struct pci_slot_attribute { 212 struct attribute attr; 213 ssize_t (*show)(struct pci_slot *, char *); 214 ssize_t (*store)(struct pci_slot *, const char *, size_t); 215 }; 216 #define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr) 217 218 enum pci_bar_type { 219 pci_bar_unknown, /* Standard PCI BAR probe */ 220 pci_bar_io, /* An I/O port BAR */ 221 pci_bar_mem32, /* A 32-bit memory BAR */ 222 pci_bar_mem64, /* A 64-bit memory BAR */ 223 }; 224 225 struct device *pci_get_host_bridge_device(struct pci_dev *dev); 226 void pci_put_host_bridge_device(struct device *dev); 227 228 int pci_configure_extended_tags(struct pci_dev *dev, void *ign); 229 bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl, 230 int crs_timeout); 231 bool pci_bus_generic_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl, 232 int crs_timeout); 233 int pci_idt_bus_quirk(struct pci_bus *bus, int devfn, u32 *pl, int crs_timeout); 234 235 int pci_setup_device(struct pci_dev *dev); 236 int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, 237 struct resource *res, unsigned int reg); 238 void pci_configure_ari(struct pci_dev *dev); 239 void __pci_bus_size_bridges(struct pci_bus *bus, 240 struct list_head *realloc_head); 241 void __pci_bus_assign_resources(const struct pci_bus *bus, 242 struct list_head *realloc_head, 243 struct list_head *fail_head); 244 bool pci_bus_clip_resource(struct pci_dev *dev, int idx); 245 246 void pci_reassigndev_resource_alignment(struct pci_dev *dev); 247 void pci_disable_bridge_window(struct pci_dev *dev); 248 struct pci_bus *pci_bus_get(struct pci_bus *bus); 249 void pci_bus_put(struct pci_bus *bus); 250 251 /* PCIe link information from Link Capabilities 2 */ 252 #define PCIE_LNKCAP2_SLS2SPEED(lnkcap2) \ 253 ((lnkcap2) & PCI_EXP_LNKCAP2_SLS_64_0GB ? PCIE_SPEED_64_0GT : \ 254 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_32_0GB ? PCIE_SPEED_32_0GT : \ 255 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_16_0GB ? PCIE_SPEED_16_0GT : \ 256 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_8_0GB ? PCIE_SPEED_8_0GT : \ 257 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_5_0GB ? PCIE_SPEED_5_0GT : \ 258 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_2_5GB ? PCIE_SPEED_2_5GT : \ 259 PCI_SPEED_UNKNOWN) 260 261 /* PCIe speed to Mb/s reduced by encoding overhead */ 262 #define PCIE_SPEED2MBS_ENC(speed) \ 263 ((speed) == PCIE_SPEED_64_0GT ? 64000*128/130 : \ 264 (speed) == PCIE_SPEED_32_0GT ? 32000*128/130 : \ 265 (speed) == PCIE_SPEED_16_0GT ? 16000*128/130 : \ 266 (speed) == PCIE_SPEED_8_0GT ? 8000*128/130 : \ 267 (speed) == PCIE_SPEED_5_0GT ? 5000*8/10 : \ 268 (speed) == PCIE_SPEED_2_5GT ? 2500*8/10 : \ 269 0) 270 271 const char *pci_speed_string(enum pci_bus_speed speed); 272 enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev); 273 enum pcie_link_width pcie_get_width_cap(struct pci_dev *dev); 274 u32 pcie_bandwidth_capable(struct pci_dev *dev, enum pci_bus_speed *speed, 275 enum pcie_link_width *width); 276 void __pcie_print_link_status(struct pci_dev *dev, bool verbose); 277 void pcie_report_downtraining(struct pci_dev *dev); 278 void pcie_update_link_speed(struct pci_bus *bus, u16 link_status); 279 280 /* Single Root I/O Virtualization */ 281 struct pci_sriov { 282 int pos; /* Capability position */ 283 int nres; /* Number of resources */ 284 u32 cap; /* SR-IOV Capabilities */ 285 u16 ctrl; /* SR-IOV Control */ 286 u16 total_VFs; /* Total VFs associated with the PF */ 287 u16 initial_VFs; /* Initial VFs associated with the PF */ 288 u16 num_VFs; /* Number of VFs available */ 289 u16 offset; /* First VF Routing ID offset */ 290 u16 stride; /* Following VF stride */ 291 u16 vf_device; /* VF device ID */ 292 u32 pgsz; /* Page size for BAR alignment */ 293 u8 link; /* Function Dependency Link */ 294 u8 max_VF_buses; /* Max buses consumed by VFs */ 295 u16 driver_max_VFs; /* Max num VFs driver supports */ 296 struct pci_dev *dev; /* Lowest numbered PF */ 297 struct pci_dev *self; /* This PF */ 298 u32 class; /* VF device */ 299 u8 hdr_type; /* VF header type */ 300 u16 subsystem_vendor; /* VF subsystem vendor */ 301 u16 subsystem_device; /* VF subsystem device */ 302 resource_size_t barsz[PCI_SRIOV_NUM_BARS]; /* VF BAR size */ 303 bool drivers_autoprobe; /* Auto probing of VFs by driver */ 304 }; 305 306 /** 307 * pci_dev_set_io_state - Set the new error state if possible. 308 * 309 * @dev: PCI device to set new error_state 310 * @new: the state we want dev to be in 311 * 312 * Must be called with device_lock held. 313 * 314 * Returns true if state has been changed to the requested state. 315 */ 316 static inline bool pci_dev_set_io_state(struct pci_dev *dev, 317 pci_channel_state_t new) 318 { 319 bool changed = false; 320 321 device_lock_assert(&dev->dev); 322 switch (new) { 323 case pci_channel_io_perm_failure: 324 switch (dev->error_state) { 325 case pci_channel_io_frozen: 326 case pci_channel_io_normal: 327 case pci_channel_io_perm_failure: 328 changed = true; 329 break; 330 } 331 break; 332 case pci_channel_io_frozen: 333 switch (dev->error_state) { 334 case pci_channel_io_frozen: 335 case pci_channel_io_normal: 336 changed = true; 337 break; 338 } 339 break; 340 case pci_channel_io_normal: 341 switch (dev->error_state) { 342 case pci_channel_io_frozen: 343 case pci_channel_io_normal: 344 changed = true; 345 break; 346 } 347 break; 348 } 349 if (changed) 350 dev->error_state = new; 351 return changed; 352 } 353 354 static inline int pci_dev_set_disconnected(struct pci_dev *dev, void *unused) 355 { 356 device_lock(&dev->dev); 357 pci_dev_set_io_state(dev, pci_channel_io_perm_failure); 358 device_unlock(&dev->dev); 359 360 return 0; 361 } 362 363 static inline bool pci_dev_is_disconnected(const struct pci_dev *dev) 364 { 365 return dev->error_state == pci_channel_io_perm_failure; 366 } 367 368 /* pci_dev priv_flags */ 369 #define PCI_DEV_ADDED 0 370 #define PCI_DPC_RECOVERED 1 371 #define PCI_DPC_RECOVERING 2 372 373 static inline void pci_dev_assign_added(struct pci_dev *dev, bool added) 374 { 375 assign_bit(PCI_DEV_ADDED, &dev->priv_flags, added); 376 } 377 378 static inline bool pci_dev_is_added(const struct pci_dev *dev) 379 { 380 return test_bit(PCI_DEV_ADDED, &dev->priv_flags); 381 } 382 383 #ifdef CONFIG_PCIEAER 384 #include <linux/aer.h> 385 386 #define AER_MAX_MULTI_ERR_DEVICES 5 /* Not likely to have more */ 387 388 struct aer_err_info { 389 struct pci_dev *dev[AER_MAX_MULTI_ERR_DEVICES]; 390 int error_dev_num; 391 392 unsigned int id:16; 393 394 unsigned int severity:2; /* 0:NONFATAL | 1:FATAL | 2:COR */ 395 unsigned int __pad1:5; 396 unsigned int multi_error_valid:1; 397 398 unsigned int first_error:5; 399 unsigned int __pad2:2; 400 unsigned int tlp_header_valid:1; 401 402 unsigned int status; /* COR/UNCOR Error Status */ 403 unsigned int mask; /* COR/UNCOR Error Mask */ 404 struct aer_header_log_regs tlp; /* TLP Header */ 405 }; 406 407 int aer_get_device_error_info(struct pci_dev *dev, struct aer_err_info *info); 408 void aer_print_error(struct pci_dev *dev, struct aer_err_info *info); 409 #endif /* CONFIG_PCIEAER */ 410 411 #ifdef CONFIG_PCIEPORTBUS 412 /* Cached RCEC Endpoint Association */ 413 struct rcec_ea { 414 u8 nextbusn; 415 u8 lastbusn; 416 u32 bitmap; 417 }; 418 #endif 419 420 #ifdef CONFIG_PCIE_DPC 421 void pci_save_dpc_state(struct pci_dev *dev); 422 void pci_restore_dpc_state(struct pci_dev *dev); 423 void pci_dpc_init(struct pci_dev *pdev); 424 void dpc_process_error(struct pci_dev *pdev); 425 pci_ers_result_t dpc_reset_link(struct pci_dev *pdev); 426 bool pci_dpc_recovered(struct pci_dev *pdev); 427 #else 428 static inline void pci_save_dpc_state(struct pci_dev *dev) {} 429 static inline void pci_restore_dpc_state(struct pci_dev *dev) {} 430 static inline void pci_dpc_init(struct pci_dev *pdev) {} 431 static inline bool pci_dpc_recovered(struct pci_dev *pdev) { return false; } 432 #endif 433 434 #ifdef CONFIG_PCIEPORTBUS 435 void pci_rcec_init(struct pci_dev *dev); 436 void pci_rcec_exit(struct pci_dev *dev); 437 void pcie_link_rcec(struct pci_dev *rcec); 438 void pcie_walk_rcec(struct pci_dev *rcec, 439 int (*cb)(struct pci_dev *, void *), 440 void *userdata); 441 #else 442 static inline void pci_rcec_init(struct pci_dev *dev) {} 443 static inline void pci_rcec_exit(struct pci_dev *dev) {} 444 static inline void pcie_link_rcec(struct pci_dev *rcec) {} 445 static inline void pcie_walk_rcec(struct pci_dev *rcec, 446 int (*cb)(struct pci_dev *, void *), 447 void *userdata) {} 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_PRI 460 void pci_pri_init(struct pci_dev *dev); 461 void pci_restore_pri_state(struct pci_dev *pdev); 462 #else 463 static inline void pci_pri_init(struct pci_dev *dev) { } 464 static inline void pci_restore_pri_state(struct pci_dev *pdev) { } 465 #endif 466 467 #ifdef CONFIG_PCI_PASID 468 void pci_pasid_init(struct pci_dev *dev); 469 void pci_restore_pasid_state(struct pci_dev *pdev); 470 #else 471 static inline void pci_pasid_init(struct pci_dev *dev) { } 472 static inline void pci_restore_pasid_state(struct pci_dev *pdev) { } 473 #endif 474 475 #ifdef CONFIG_PCI_IOV 476 int pci_iov_init(struct pci_dev *dev); 477 void pci_iov_release(struct pci_dev *dev); 478 void pci_iov_remove(struct pci_dev *dev); 479 void pci_iov_update_resource(struct pci_dev *dev, int resno); 480 resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno); 481 void pci_restore_iov_state(struct pci_dev *dev); 482 int pci_iov_bus_range(struct pci_bus *bus); 483 extern const struct attribute_group sriov_pf_dev_attr_group; 484 extern const struct attribute_group sriov_vf_dev_attr_group; 485 #else 486 static inline int pci_iov_init(struct pci_dev *dev) 487 { 488 return -ENODEV; 489 } 490 static inline void pci_iov_release(struct pci_dev *dev) 491 492 { 493 } 494 static inline void pci_iov_remove(struct pci_dev *dev) 495 { 496 } 497 static inline void pci_restore_iov_state(struct pci_dev *dev) 498 { 499 } 500 static inline int pci_iov_bus_range(struct pci_bus *bus) 501 { 502 return 0; 503 } 504 505 #endif /* CONFIG_PCI_IOV */ 506 507 #ifdef CONFIG_PCIE_PTM 508 void pci_save_ptm_state(struct pci_dev *dev); 509 void pci_restore_ptm_state(struct pci_dev *dev); 510 void pci_disable_ptm(struct pci_dev *dev); 511 #else 512 static inline void pci_save_ptm_state(struct pci_dev *dev) { } 513 static inline void pci_restore_ptm_state(struct pci_dev *dev) { } 514 static inline void pci_disable_ptm(struct pci_dev *dev) { } 515 #endif 516 517 unsigned long pci_cardbus_resource_alignment(struct resource *); 518 519 static inline resource_size_t pci_resource_alignment(struct pci_dev *dev, 520 struct resource *res) 521 { 522 #ifdef CONFIG_PCI_IOV 523 int resno = res - dev->resource; 524 525 if (resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END) 526 return pci_sriov_resource_alignment(dev, resno); 527 #endif 528 if (dev->class >> 8 == PCI_CLASS_BRIDGE_CARDBUS) 529 return pci_cardbus_resource_alignment(res); 530 return resource_alignment(res); 531 } 532 533 void pci_acs_init(struct pci_dev *dev); 534 #ifdef CONFIG_PCI_QUIRKS 535 int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags); 536 int pci_dev_specific_enable_acs(struct pci_dev *dev); 537 int pci_dev_specific_disable_acs_redir(struct pci_dev *dev); 538 #else 539 static inline int pci_dev_specific_acs_enabled(struct pci_dev *dev, 540 u16 acs_flags) 541 { 542 return -ENOTTY; 543 } 544 static inline int pci_dev_specific_enable_acs(struct pci_dev *dev) 545 { 546 return -ENOTTY; 547 } 548 static inline int pci_dev_specific_disable_acs_redir(struct pci_dev *dev) 549 { 550 return -ENOTTY; 551 } 552 #endif 553 554 /* PCI error reporting and recovery */ 555 pci_ers_result_t pcie_do_recovery(struct pci_dev *dev, 556 pci_channel_state_t state, 557 pci_ers_result_t (*reset_subordinates)(struct pci_dev *pdev)); 558 559 bool pcie_wait_for_link(struct pci_dev *pdev, bool active); 560 #ifdef CONFIG_PCIEASPM 561 void pcie_aspm_init_link_state(struct pci_dev *pdev); 562 void pcie_aspm_exit_link_state(struct pci_dev *pdev); 563 void pcie_aspm_powersave_config_link(struct pci_dev *pdev); 564 #else 565 static inline void pcie_aspm_init_link_state(struct pci_dev *pdev) { } 566 static inline void pcie_aspm_exit_link_state(struct pci_dev *pdev) { } 567 static inline void pcie_aspm_powersave_config_link(struct pci_dev *pdev) { } 568 #endif 569 570 #ifdef CONFIG_PCIE_ECRC 571 void pcie_set_ecrc_checking(struct pci_dev *dev); 572 void pcie_ecrc_get_policy(char *str); 573 #else 574 static inline void pcie_set_ecrc_checking(struct pci_dev *dev) { } 575 static inline void pcie_ecrc_get_policy(char *str) { } 576 #endif 577 578 #ifdef CONFIG_PCIE_PTM 579 void pci_ptm_init(struct pci_dev *dev); 580 #else 581 static inline void pci_ptm_init(struct pci_dev *dev) { } 582 #endif 583 584 struct pci_dev_reset_methods { 585 u16 vendor; 586 u16 device; 587 int (*reset)(struct pci_dev *dev, bool probe); 588 }; 589 590 struct pci_reset_fn_method { 591 int (*reset_fn)(struct pci_dev *pdev, bool probe); 592 char *name; 593 }; 594 595 #ifdef CONFIG_PCI_QUIRKS 596 int pci_dev_specific_reset(struct pci_dev *dev, bool probe); 597 #else 598 static inline int pci_dev_specific_reset(struct pci_dev *dev, bool probe) 599 { 600 return -ENOTTY; 601 } 602 #endif 603 604 #if defined(CONFIG_PCI_QUIRKS) && defined(CONFIG_ARM64) 605 int acpi_get_rc_resources(struct device *dev, const char *hid, u16 segment, 606 struct resource *res); 607 #else 608 static inline int acpi_get_rc_resources(struct device *dev, const char *hid, 609 u16 segment, struct resource *res) 610 { 611 return -ENODEV; 612 } 613 #endif 614 615 int pci_rebar_get_current_size(struct pci_dev *pdev, int bar); 616 int pci_rebar_set_size(struct pci_dev *pdev, int bar, int size); 617 static inline u64 pci_rebar_size_to_bytes(int size) 618 { 619 return 1ULL << (size + 20); 620 } 621 622 struct device_node; 623 624 #ifdef CONFIG_OF 625 int of_pci_parse_bus_range(struct device_node *node, struct resource *res); 626 int of_get_pci_domain_nr(struct device_node *node); 627 int of_pci_get_max_link_speed(struct device_node *node); 628 u32 of_pci_get_slot_power_limit(struct device_node *node, 629 u8 *slot_power_limit_value, 630 u8 *slot_power_limit_scale); 631 void pci_set_of_node(struct pci_dev *dev); 632 void pci_release_of_node(struct pci_dev *dev); 633 void pci_set_bus_of_node(struct pci_bus *bus); 634 void pci_release_bus_of_node(struct pci_bus *bus); 635 636 int devm_of_pci_bridge_init(struct device *dev, struct pci_host_bridge *bridge); 637 638 #else 639 static inline int 640 of_pci_parse_bus_range(struct device_node *node, struct resource *res) 641 { 642 return -EINVAL; 643 } 644 645 static inline int 646 of_get_pci_domain_nr(struct device_node *node) 647 { 648 return -1; 649 } 650 651 static inline int 652 of_pci_get_max_link_speed(struct device_node *node) 653 { 654 return -EINVAL; 655 } 656 657 static inline u32 658 of_pci_get_slot_power_limit(struct device_node *node, 659 u8 *slot_power_limit_value, 660 u8 *slot_power_limit_scale) 661 { 662 if (slot_power_limit_value) 663 *slot_power_limit_value = 0; 664 if (slot_power_limit_scale) 665 *slot_power_limit_scale = 0; 666 return 0; 667 } 668 669 static inline void pci_set_of_node(struct pci_dev *dev) { } 670 static inline void pci_release_of_node(struct pci_dev *dev) { } 671 static inline void pci_set_bus_of_node(struct pci_bus *bus) { } 672 static inline void pci_release_bus_of_node(struct pci_bus *bus) { } 673 674 static inline int devm_of_pci_bridge_init(struct device *dev, struct pci_host_bridge *bridge) 675 { 676 return 0; 677 } 678 679 #endif /* CONFIG_OF */ 680 681 #ifdef CONFIG_PCIEAER 682 void pci_no_aer(void); 683 void pci_aer_init(struct pci_dev *dev); 684 void pci_aer_exit(struct pci_dev *dev); 685 extern const struct attribute_group aer_stats_attr_group; 686 void pci_aer_clear_fatal_status(struct pci_dev *dev); 687 int pci_aer_clear_status(struct pci_dev *dev); 688 int pci_aer_raw_clear_status(struct pci_dev *dev); 689 #else 690 static inline void pci_no_aer(void) { } 691 static inline void pci_aer_init(struct pci_dev *d) { } 692 static inline void pci_aer_exit(struct pci_dev *d) { } 693 static inline void pci_aer_clear_fatal_status(struct pci_dev *dev) { } 694 static inline int pci_aer_clear_status(struct pci_dev *dev) { return -EINVAL; } 695 static inline int pci_aer_raw_clear_status(struct pci_dev *dev) { return -EINVAL; } 696 #endif 697 698 #ifdef CONFIG_ACPI 699 int pci_acpi_program_hp_params(struct pci_dev *dev); 700 extern const struct attribute_group pci_dev_acpi_attr_group; 701 void pci_set_acpi_fwnode(struct pci_dev *dev); 702 int pci_dev_acpi_reset(struct pci_dev *dev, bool probe); 703 bool acpi_pci_power_manageable(struct pci_dev *dev); 704 bool acpi_pci_bridge_d3(struct pci_dev *dev); 705 int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state); 706 pci_power_t acpi_pci_get_power_state(struct pci_dev *dev); 707 void acpi_pci_refresh_power_state(struct pci_dev *dev); 708 int acpi_pci_wakeup(struct pci_dev *dev, bool enable); 709 bool acpi_pci_need_resume(struct pci_dev *dev); 710 pci_power_t acpi_pci_choose_state(struct pci_dev *pdev); 711 #else 712 static inline int pci_dev_acpi_reset(struct pci_dev *dev, bool probe) 713 { 714 return -ENOTTY; 715 } 716 static inline void pci_set_acpi_fwnode(struct pci_dev *dev) {} 717 static inline int pci_acpi_program_hp_params(struct pci_dev *dev) 718 { 719 return -ENODEV; 720 } 721 static inline bool acpi_pci_power_manageable(struct pci_dev *dev) 722 { 723 return false; 724 } 725 static inline bool acpi_pci_bridge_d3(struct pci_dev *dev) 726 { 727 return false; 728 } 729 static inline int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state) 730 { 731 return -ENODEV; 732 } 733 static inline pci_power_t acpi_pci_get_power_state(struct pci_dev *dev) 734 { 735 return PCI_UNKNOWN; 736 } 737 static inline void acpi_pci_refresh_power_state(struct pci_dev *dev) {} 738 static inline int acpi_pci_wakeup(struct pci_dev *dev, bool enable) 739 { 740 return -ENODEV; 741 } 742 static inline bool acpi_pci_need_resume(struct pci_dev *dev) 743 { 744 return false; 745 } 746 static inline pci_power_t acpi_pci_choose_state(struct pci_dev *pdev) 747 { 748 return PCI_POWER_ERROR; 749 } 750 #endif 751 752 #ifdef CONFIG_PCIEASPM 753 extern const struct attribute_group aspm_ctrl_attr_group; 754 #endif 755 756 extern const struct attribute_group pci_dev_reset_method_attr_group; 757 758 #ifdef CONFIG_X86_INTEL_MID 759 bool pci_use_mid_pm(void); 760 int mid_pci_set_power_state(struct pci_dev *pdev, pci_power_t state); 761 pci_power_t mid_pci_get_power_state(struct pci_dev *pdev); 762 #else 763 static inline bool pci_use_mid_pm(void) 764 { 765 return false; 766 } 767 static inline int mid_pci_set_power_state(struct pci_dev *pdev, pci_power_t state) 768 { 769 return -ENODEV; 770 } 771 static inline pci_power_t mid_pci_get_power_state(struct pci_dev *pdev) 772 { 773 return PCI_UNKNOWN; 774 } 775 #endif 776 777 #endif /* DRIVERS_PCI_H */ 778