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 /* 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 #if !defined(CONFIG_DMI) && !defined(CONFIG_ACPI)
  25 static inline void pci_create_firmware_label_files(struct pci_dev *pdev)
  26 { return; }
  27 static inline void pci_remove_firmware_label_files(struct pci_dev *pdev)
  28 { return; }
  29 #else
  30 void pci_create_firmware_label_files(struct pci_dev *pdev);
  31 void pci_remove_firmware_label_files(struct pci_dev *pdev);
  32 #endif
  33 void pci_cleanup_rom(struct pci_dev *dev);
  34
  35 enum pci_mmap_api {
  36         PCI_MMAP_SYSFS, /* mmap on /sys/bus/pci/devices/<BDF>/resource<N> */
  37         PCI_MMAP_PROCFS /* mmap on /proc/bus/pci/<BDF> */
  38 };
  39 int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vmai,
  40                   enum pci_mmap_api mmap_api);
  41
  42 int pci_probe_reset_function(struct pci_dev *dev);
  43 int pci_bridge_secondary_bus_reset(struct pci_dev *dev);
  44 int pci_bus_error_reset(struct pci_dev *dev);
  45
  46 #define PCI_PM_D2_DELAY         200
  47 #define PCI_PM_D3_WAIT          10
  48 #define PCI_PM_D3COLD_WAIT      100
  49 #define PCI_PM_BUS_WAIT         50
  50
  51 /**
  52  * struct pci_platform_pm_ops - Firmware PM callbacks
  53  *
  54  * @bridge_d3: Does the bridge allow entering into D3
  55  *
  56  * @is_manageable: returns 'true' if given device is power manageable by the
  57  *                 platform firmware
  58  *
  59  * @set_state: invokes the platform firmware to set the device's power state
  60  *
  61  * @get_state: queries the platform firmware for a device's current power state
  62  *
  63  * @refresh_state: asks the platform to refresh the device's power state data
  64  *
  65  * @choose_state: returns PCI power state of given device preferred by the
  66  *                platform; to be used during system-wide transitions from a
  67  *                sleeping state to the working state and vice versa
  68  *
  69  * @set_wakeup: enables/disables wakeup capability for the device
  70  *
  71  * @need_resume: returns 'true' if the given device (which is currently
  72  *               suspended) needs to be resumed to be configured for system
  73  *               wakeup.
  74  *
  75  * If given platform is generally capable of power managing PCI devices, all of
  76  * these callbacks are mandatory.
  77  */
  78 struct pci_platform_pm_ops {
  79         bool (*bridge_d3)(struct pci_dev *dev);
  80         bool (*is_manageable)(struct pci_dev *dev);
  81         int (*set_state)(struct pci_dev *dev, pci_power_t state);
  82         pci_power_t (*get_state)(struct pci_dev *dev);
  83         void (*refresh_state)(struct pci_dev *dev);
  84         pci_power_t (*choose_state)(struct pci_dev *dev);
  85         int (*set_wakeup)(struct pci_dev *dev, bool enable);
  86         bool (*need_resume)(struct pci_dev *dev);
  87 };
  88
  89 int pci_set_platform_pm(const struct pci_platform_pm_ops *ops);
  90 void pci_update_current_state(struct pci_dev *dev, pci_power_t state);
  91 void pci_refresh_power_state(struct pci_dev *dev);
  92 int pci_power_up(struct pci_dev *dev);
  93 void pci_disable_enabled_device(struct pci_dev *dev);
  94 int pci_finish_runtime_suspend(struct pci_dev *dev);
  95 void pcie_clear_root_pme_status(struct pci_dev *dev);
  96 bool pci_check_pme_status(struct pci_dev *dev);
  97 void pci_pme_wakeup_bus(struct pci_bus *bus);
  98 int __pci_pme_wakeup(struct pci_dev *dev, void *ign);
  99 void pci_pme_restore(struct pci_dev *dev);
 100 bool pci_dev_need_resume(struct pci_dev *dev);
 101 void pci_dev_adjust_pme(struct pci_dev *dev);
 102 void pci_dev_complete_resume(struct pci_dev *pci_dev);
 103 void pci_config_pm_runtime_get(struct pci_dev *dev);
 104 void pci_config_pm_runtime_put(struct pci_dev *dev);
 105 void pci_pm_init(struct pci_dev *dev);
 106 void pci_ea_init(struct pci_dev *dev);
 107 void pci_allocate_cap_save_buffers(struct pci_dev *dev);
 108 void pci_free_cap_save_buffers(struct pci_dev *dev);
 109 bool pci_bridge_d3_possible(struct pci_dev *dev);
 110 void pci_bridge_d3_update(struct pci_dev *dev);
 111 void pci_bridge_wait_for_secondary_bus(struct pci_dev *dev);
 112
 113 static inline void pci_wakeup_event(struct pci_dev *dev)
 114 {
 115         /* Wait 100 ms before the system can be put into a sleep state. */
 116         pm_wakeup_event(&dev->dev, 100);
 117 }
 118
 119 static inline bool pci_has_subordinate(struct pci_dev *pci_dev)
 120 {
 121         return !!(pci_dev->subordinate);
 122 }
 123
 124 static inline bool pci_power_manageable(struct pci_dev *pci_dev)
 125 {
 126         /*
 127          * Currently we allow normal PCI devices and PCI bridges transition
 128          * into D3 if their bridge_d3 is set.
 129          */
 130         return !pci_has_subordinate(pci_dev) || pci_dev->bridge_d3;
 131 }
 132
 133 static inline bool pcie_downstream_port(const struct pci_dev *dev)
 134 {
 135         int type = pci_pcie_type(dev);
 136
 137         return type == PCI_EXP_TYPE_ROOT_PORT ||
 138                type == PCI_EXP_TYPE_DOWNSTREAM ||
 139                type == PCI_EXP_TYPE_PCIE_BRIDGE;
 140 }
 141
 142 int pci_vpd_init(struct pci_dev *dev);
 143 void pci_vpd_release(struct pci_dev *dev);
 144 void pcie_vpd_create_sysfs_dev_files(struct pci_dev *dev);
 145 void pcie_vpd_remove_sysfs_dev_files(struct pci_dev *dev);
 146
 147 /* PCI Virtual Channel */
 148 int pci_save_vc_state(struct pci_dev *dev);
 149 void pci_restore_vc_state(struct pci_dev *dev);
 150 void pci_allocate_vc_save_buffers(struct pci_dev *dev);
 151
 152 /* PCI /proc functions */
 153 #ifdef CONFIG_PROC_FS
 154 int pci_proc_attach_device(struct pci_dev *dev);
 155 int pci_proc_detach_device(struct pci_dev *dev);
 156 int pci_proc_detach_bus(struct pci_bus *bus);
 157 #else
 158 static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; }
 159 static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; }
 160 static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
 161 #endif
 162
 163 /* Functions for PCI Hotplug drivers to use */
 164 int pci_hp_add_bridge(struct pci_dev *dev);
 165
 166 #ifdef HAVE_PCI_LEGACY
 167 void pci_create_legacy_files(struct pci_bus *bus);
 168 void pci_remove_legacy_files(struct pci_bus *bus);
 169 #else
 170 static inline void pci_create_legacy_files(struct pci_bus *bus) { return; }
 171 static inline void pci_remove_legacy_files(struct pci_bus *bus) { return; }
 172 #endif
 173
 174 /* Lock for read/write access to pci device and bus lists */
 175 extern struct rw_semaphore pci_bus_sem;
 176 extern struct mutex pci_slot_mutex;
 177
 178 extern raw_spinlock_t pci_lock;
 179
 180 extern unsigned int pci_pm_d3_delay;
 181
 182 #ifdef CONFIG_PCI_MSI
 183 void pci_no_msi(void);
 184 #else
 185 static inline void pci_no_msi(void) { }
 186 #endif
 187
 188 static inline void pci_msi_set_enable(struct pci_dev *dev, int enable)
 189 {
 190         u16 control;
 191
 192         pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &control);
 193         control &= ~PCI_MSI_FLAGS_ENABLE;
 194         if (enable)
 195                 control |= PCI_MSI_FLAGS_ENABLE;
 196         pci_write_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, control);
 197 }
 198
 199 static inline void pci_msix_clear_and_set_ctrl(struct pci_dev *dev, u16 clear, u16 set)
 200 {
 201         u16 ctrl;
 202
 203         pci_read_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, &ctrl);
 204         ctrl &= ~clear;
 205         ctrl |= set;
 206         pci_write_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, ctrl);
 207 }
 208
 209 void pci_realloc_get_opt(char *);
 210
 211 static inline int pci_no_d1d2(struct pci_dev *dev)
 212 {
 213         unsigned int parent_dstates = 0;
 214
 215         if (dev->bus->self)
 216                 parent_dstates = dev->bus->self->no_d1d2;
 217         return (dev->no_d1d2 || parent_dstates);
 218
 219 }
 220 extern const struct attribute_group *pci_dev_groups[];
 221 extern const struct attribute_group *pcibus_groups[];
 222 extern const struct device_type pci_dev_type;
 223 extern const struct attribute_group *pci_bus_groups[];
 224
 225 extern unsigned long pci_hotplug_io_size;
 226 extern unsigned long pci_hotplug_mmio_size;
 227 extern unsigned long pci_hotplug_mmio_pref_size;
 228 extern unsigned long pci_hotplug_bus_size;
 229
 230 /**
 231  * pci_match_one_device - Tell if a PCI device structure has a matching
 232  *                        PCI device id structure
 233  * @id: single PCI device id structure to match
 234  * @dev: the PCI device structure to match against
 235  *
 236  * Returns the matching pci_device_id structure or %NULL if there is no match.
 237  */
 238 static inline const struct pci_device_id *
 239 pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev)
 240 {
 241         if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) &&
 242             (id->device == PCI_ANY_ID || id->device == dev->device) &&
 243             (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) &&
 244             (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) &&
 245             !((id->class ^ dev->class) & id->class_mask))
 246                 return id;
 247         return NULL;
 248 }
 249
 250 /* PCI slot sysfs helper code */
 251 #define to_pci_slot(s) container_of(s, struct pci_slot, kobj)
 252
 253 extern struct kset *pci_slots_kset;
 254
 255 struct pci_slot_attribute {
 256         struct attribute attr;
 257         ssize_t (*show)(struct pci_slot *, char *);
 258         ssize_t (*store)(struct pci_slot *, const char *, size_t);
 259 };
 260 #define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)
 261
 262 enum pci_bar_type {
 263         pci_bar_unknown,        /* Standard PCI BAR probe */
 264         pci_bar_io,             /* An I/O port BAR */
 265         pci_bar_mem32,          /* A 32-bit memory BAR */
 266         pci_bar_mem64,          /* A 64-bit memory BAR */
 267 };
 268
 269 struct device *pci_get_host_bridge_device(struct pci_dev *dev);
 270 void pci_put_host_bridge_device(struct device *dev);
 271
 272 int pci_configure_extended_tags(struct pci_dev *dev, void *ign);
 273 bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
 274                                 int crs_timeout);
 275 bool pci_bus_generic_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
 276                                         int crs_timeout);
 277 int pci_idt_bus_quirk(struct pci_bus *bus, int devfn, u32 *pl, int crs_timeout);
 278
 279 int pci_setup_device(struct pci_dev *dev);
 280 int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
 281                     struct resource *res, unsigned int reg);
 282 void pci_configure_ari(struct pci_dev *dev);
 283 void __pci_bus_size_bridges(struct pci_bus *bus,
 284                         struct list_head *realloc_head);
 285 void __pci_bus_assign_resources(const struct pci_bus *bus,
 286                                 struct list_head *realloc_head,
 287                                 struct list_head *fail_head);
 288 bool pci_bus_clip_resource(struct pci_dev *dev, int idx);
 289
 290 void pci_reassigndev_resource_alignment(struct pci_dev *dev);
 291 void pci_disable_bridge_window(struct pci_dev *dev);
 292 struct pci_bus *pci_bus_get(struct pci_bus *bus);
 293 void pci_bus_put(struct pci_bus *bus);
 294
 295 /* PCIe link information from Link Capabilities 2 */
 296 #define PCIE_LNKCAP2_SLS2SPEED(lnkcap2) \
 297         ((lnkcap2) & PCI_EXP_LNKCAP2_SLS_32_0GB ? PCIE_SPEED_32_0GT : \
 298          (lnkcap2) & PCI_EXP_LNKCAP2_SLS_16_0GB ? PCIE_SPEED_16_0GT : \
 299          (lnkcap2) & PCI_EXP_LNKCAP2_SLS_8_0GB ? PCIE_SPEED_8_0GT : \
 300          (lnkcap2) & PCI_EXP_LNKCAP2_SLS_5_0GB ? PCIE_SPEED_5_0GT : \
 301          (lnkcap2) & PCI_EXP_LNKCAP2_SLS_2_5GB ? PCIE_SPEED_2_5GT : \
 302          PCI_SPEED_UNKNOWN)
 303
 304 /* PCIe speed to Mb/s reduced by encoding overhead */
 305 #define PCIE_SPEED2MBS_ENC(speed) \
 306         ((speed) == PCIE_SPEED_32_0GT ? 32000*128/130 : \
 307          (speed) == PCIE_SPEED_16_0GT ? 16000*128/130 : \
 308          (speed) == PCIE_SPEED_8_0GT  ?  8000*128/130 : \
 309          (speed) == PCIE_SPEED_5_0GT  ?  5000*8/10 : \
 310          (speed) == PCIE_SPEED_2_5GT  ?  2500*8/10 : \
 311          0)
 312
 313 const char *pci_speed_string(enum pci_bus_speed speed);
 314 enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev);
 315 enum pcie_link_width pcie_get_width_cap(struct pci_dev *dev);
 316 u32 pcie_bandwidth_capable(struct pci_dev *dev, enum pci_bus_speed *speed,
 317                            enum pcie_link_width *width);
 318 void __pcie_print_link_status(struct pci_dev *dev, bool verbose);
 319 void pcie_report_downtraining(struct pci_dev *dev);
 320 void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
 321
 322 /* Single Root I/O Virtualization */
 323 struct pci_sriov {
 324         int             pos;            /* Capability position */
 325         int             nres;           /* Number of resources */
 326         u32             cap;            /* SR-IOV Capabilities */
 327         u16             ctrl;           /* SR-IOV Control */
 328         u16             total_VFs;      /* Total VFs associated with the PF */
 329         u16             initial_VFs;    /* Initial VFs associated with the PF */
 330         u16             num_VFs;        /* Number of VFs available */
 331         u16             offset;         /* First VF Routing ID offset */
 332         u16             stride;         /* Following VF stride */
 333         u16             vf_device;      /* VF device ID */
 334         u32             pgsz;           /* Page size for BAR alignment */
 335         u8              link;           /* Function Dependency Link */
 336         u8              max_VF_buses;   /* Max buses consumed by VFs */
 337         u16             driver_max_VFs; /* Max num VFs driver supports */
 338         struct pci_dev  *dev;           /* Lowest numbered PF */
 339         struct pci_dev  *self;          /* This PF */
 340         u32             class;          /* VF device */
 341         u8              hdr_type;       /* VF header type */
 342         u16             subsystem_vendor; /* VF subsystem vendor */
 343         u16             subsystem_device; /* VF subsystem device */
 344         resource_size_t barsz[PCI_SRIOV_NUM_BARS];      /* VF BAR size */
 345         bool            drivers_autoprobe; /* Auto probing of VFs by driver */
 346 };
 347
 348 /**
 349  * pci_dev_set_io_state - Set the new error state if possible.
 350  *
 351  * @dev - pci device to set new error_state
 352  * @new - the state we want dev to be in
 353  *
 354  * Must be called with device_lock held.
 355  *
 356  * Returns true if state has been changed to the requested state.
 357  */
 358 static inline bool pci_dev_set_io_state(struct pci_dev *dev,
 359                                         pci_channel_state_t new)
 360 {
 361         bool changed = false;
 362
 363         device_lock_assert(&dev->dev);
 364         switch (new) {
 365         case pci_channel_io_perm_failure:
 366                 switch (dev->error_state) {
 367                 case pci_channel_io_frozen:
 368                 case pci_channel_io_normal:
 369                 case pci_channel_io_perm_failure:
 370                         changed = true;
 371                         break;
 372                 }
 373                 break;
 374         case pci_channel_io_frozen:
 375                 switch (dev->error_state) {
 376                 case pci_channel_io_frozen:
 377                 case pci_channel_io_normal:
 378                         changed = true;
 379                         break;
 380                 }
 381                 break;
 382         case pci_channel_io_normal:
 383                 switch (dev->error_state) {
 384                 case pci_channel_io_frozen:
 385                 case pci_channel_io_normal:
 386                         changed = true;
 387                         break;
 388                 }
 389                 break;
 390         }
 391         if (changed)
 392                 dev->error_state = new;
 393         return changed;
 394 }
 395
 396 static inline int pci_dev_set_disconnected(struct pci_dev *dev, void *unused)
 397 {
 398         device_lock(&dev->dev);
 399         pci_dev_set_io_state(dev, pci_channel_io_perm_failure);
 400         device_unlock(&dev->dev);
 401
 402         return 0;
 403 }
 404
 405 static inline bool pci_dev_is_disconnected(const struct pci_dev *dev)
 406 {
 407         return dev->error_state == pci_channel_io_perm_failure;
 408 }
 409
 410 /* pci_dev priv_flags */
 411 #define PCI_DEV_ADDED 0
 412
 413 static inline void pci_dev_assign_added(struct pci_dev *dev, bool added)
 414 {
 415         assign_bit(PCI_DEV_ADDED, &dev->priv_flags, added);
 416 }
 417
 418 static inline bool pci_dev_is_added(const struct pci_dev *dev)
 419 {
 420         return test_bit(PCI_DEV_ADDED, &dev->priv_flags);
 421 }
 422
 423 #ifdef CONFIG_PCIEAER
 424 #include <linux/aer.h>
 425
 426 #define AER_MAX_MULTI_ERR_DEVICES       5       /* Not likely to have more */
 427
 428 struct aer_err_info {
 429         struct pci_dev *dev[AER_MAX_MULTI_ERR_DEVICES];
 430         int error_dev_num;
 431
 432         unsigned int id:16;
 433
 434         unsigned int severity:2;        /* 0:NONFATAL | 1:FATAL | 2:COR */
 435         unsigned int __pad1:5;
 436         unsigned int multi_error_valid:1;
 437
 438         unsigned int first_error:5;
 439         unsigned int __pad2:2;
 440         unsigned int tlp_header_valid:1;
 441
 442         unsigned int status;            /* COR/UNCOR Error Status */
 443         unsigned int mask;              /* COR/UNCOR Error Mask */
 444         struct aer_header_log_regs tlp; /* TLP Header */
 445 };
 446
 447 int aer_get_device_error_info(struct pci_dev *dev, struct aer_err_info *info);
 448 void aer_print_error(struct pci_dev *dev, struct aer_err_info *info);
 449 #endif  /* CONFIG_PCIEAER */
 450
 451 #ifdef CONFIG_PCIE_DPC
 452 void pci_save_dpc_state(struct pci_dev *dev);
 453 void pci_restore_dpc_state(struct pci_dev *dev);
 454 void pci_dpc_init(struct pci_dev *pdev);
 455 void dpc_process_error(struct pci_dev *pdev);
 456 pci_ers_result_t dpc_reset_link(struct pci_dev *pdev);
 457 #else
 458 static inline void pci_save_dpc_state(struct pci_dev *dev) {}
 459 static inline void pci_restore_dpc_state(struct pci_dev *dev) {}
 460 static inline void pci_dpc_init(struct pci_dev *pdev) {}
 461 #endif
 462
 463 #ifdef CONFIG_PCI_ATS
 464 /* Address Translation Service */
 465 void pci_ats_init(struct pci_dev *dev);
 466 void pci_restore_ats_state(struct pci_dev *dev);
 467 #else
 468 static inline void pci_ats_init(struct pci_dev *d) { }
 469 static inline void pci_restore_ats_state(struct pci_dev *dev) { }
 470 #endif /* CONFIG_PCI_ATS */
 471
 472 #ifdef CONFIG_PCI_PRI
 473 void pci_pri_init(struct pci_dev *dev);
 474 void pci_restore_pri_state(struct pci_dev *pdev);
 475 #else
 476 static inline void pci_pri_init(struct pci_dev *dev) { }
 477 static inline void pci_restore_pri_state(struct pci_dev *pdev) { }
 478 #endif
 479
 480 #ifdef CONFIG_PCI_PASID
 481 void pci_pasid_init(struct pci_dev *dev);
 482 void pci_restore_pasid_state(struct pci_dev *pdev);
 483 #else
 484 static inline void pci_pasid_init(struct pci_dev *dev) { }
 485 static inline void pci_restore_pasid_state(struct pci_dev *pdev) { }
 486 #endif
 487
 488 #ifdef CONFIG_PCI_IOV
 489 int pci_iov_init(struct pci_dev *dev);
 490 void pci_iov_release(struct pci_dev *dev);
 491 void pci_iov_remove(struct pci_dev *dev);
 492 void pci_iov_update_resource(struct pci_dev *dev, int resno);
 493 resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno);
 494 void pci_restore_iov_state(struct pci_dev *dev);
 495 int pci_iov_bus_range(struct pci_bus *bus);
 496 extern const struct attribute_group sriov_dev_attr_group;
 497 #else
 498 static inline int pci_iov_init(struct pci_dev *dev)
 499 {
 500         return -ENODEV;
 501 }
 502 static inline void pci_iov_release(struct pci_dev *dev)
 503
 504 {
 505 }
 506 static inline void pci_iov_remove(struct pci_dev *dev)
 507 {
 508 }
 509 static inline void pci_restore_iov_state(struct pci_dev *dev)
 510 {
 511 }
 512 static inline int pci_iov_bus_range(struct pci_bus *bus)
 513 {
 514         return 0;
 515 }
 516
 517 #endif /* CONFIG_PCI_IOV */
 518
 519 unsigned long pci_cardbus_resource_alignment(struct resource *);
 520
 521 static inline resource_size_t pci_resource_alignment(struct pci_dev *dev,
 522                                                      struct resource *res)
 523 {
 524 #ifdef CONFIG_PCI_IOV
 525         int resno = res - dev->resource;
 526
 527         if (resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END)
 528                 return pci_sriov_resource_alignment(dev, resno);
 529 #endif
 530         if (dev->class >> 8 == PCI_CLASS_BRIDGE_CARDBUS)
 531                 return pci_cardbus_resource_alignment(res);
 532         return resource_alignment(res);
 533 }
 534
 535 void pci_enable_acs(struct pci_dev *dev);
 536 #ifdef CONFIG_PCI_QUIRKS
 537 int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags);
 538 int pci_dev_specific_enable_acs(struct pci_dev *dev);
 539 int pci_dev_specific_disable_acs_redir(struct pci_dev *dev);
 540 #else
 541 static inline int pci_dev_specific_acs_enabled(struct pci_dev *dev,
 542                                                u16 acs_flags)
 543 {
 544         return -ENOTTY;
 545 }
 546 static inline int pci_dev_specific_enable_acs(struct pci_dev *dev)
 547 {
 548         return -ENOTTY;
 549 }
 550 static inline int pci_dev_specific_disable_acs_redir(struct pci_dev *dev)
 551 {
 552         return -ENOTTY;
 553 }
 554 #endif
 555
 556 /* PCI error reporting and recovery */
 557 pci_ers_result_t pcie_do_recovery(struct pci_dev *dev,
 558                         enum pci_channel_state state,
 559                         pci_ers_result_t (*reset_link)(struct pci_dev *pdev));
 560
 561 bool pcie_wait_for_link(struct pci_dev *pdev, bool active);
 562 #ifdef CONFIG_PCIEASPM
 563 void pcie_aspm_init_link_state(struct pci_dev *pdev);
 564 void pcie_aspm_exit_link_state(struct pci_dev *pdev);
 565 void pcie_aspm_pm_state_change(struct pci_dev *pdev);
 566 void pcie_aspm_powersave_config_link(struct pci_dev *pdev);
 567 #else
 568 static inline void pcie_aspm_init_link_state(struct pci_dev *pdev) { }
 569 static inline void pcie_aspm_exit_link_state(struct pci_dev *pdev) { }
 570 static inline void pcie_aspm_pm_state_change(struct pci_dev *pdev) { }
 571 static inline void pcie_aspm_powersave_config_link(struct pci_dev *pdev) { }
 572 #endif
 573
 574 #ifdef CONFIG_PCIE_ECRC
 575 void pcie_set_ecrc_checking(struct pci_dev *dev);
 576 void pcie_ecrc_get_policy(char *str);
 577 #else
 578 static inline void pcie_set_ecrc_checking(struct pci_dev *dev) { }
 579 static inline void pcie_ecrc_get_policy(char *str) { }
 580 #endif
 581
 582 #ifdef CONFIG_PCIE_PTM
 583 void pci_ptm_init(struct pci_dev *dev);
 584 int pci_enable_ptm(struct pci_dev *dev, u8 *granularity);
 585 #else
 586 static inline void pci_ptm_init(struct pci_dev *dev) { }
 587 static inline int pci_enable_ptm(struct pci_dev *dev, u8 *granularity)
 588 { return -EINVAL; }
 589 #endif
 590
 591 struct pci_dev_reset_methods {
 592         u16 vendor;
 593         u16 device;
 594         int (*reset)(struct pci_dev *dev, int probe);
 595 };
 596
 597 #ifdef CONFIG_PCI_QUIRKS
 598 int pci_dev_specific_reset(struct pci_dev *dev, int probe);
 599 #else
 600 static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe)
 601 {
 602         return -ENOTTY;
 603 }
 604 #endif
 605
 606 #if defined(CONFIG_PCI_QUIRKS) && defined(CONFIG_ARM64)
 607 int acpi_get_rc_resources(struct device *dev, const char *hid, u16 segment,
 608                           struct resource *res);
 609 #endif
 610
 611 u32 pci_rebar_get_possible_sizes(struct pci_dev *pdev, int bar);
 612 int pci_rebar_get_current_size(struct pci_dev *pdev, int bar);
 613 int pci_rebar_set_size(struct pci_dev *pdev, int bar, int size);
 614 static inline u64 pci_rebar_size_to_bytes(int size)
 615 {
 616         return 1ULL << (size + 20);
 617 }
 618
 619 struct device_node;
 620
 621 #ifdef CONFIG_OF
 622 int of_pci_parse_bus_range(struct device_node *node, struct resource *res);
 623 int of_get_pci_domain_nr(struct device_node *node);
 624 int of_pci_get_max_link_speed(struct device_node *node);
 625 void pci_set_of_node(struct pci_dev *dev);
 626 void pci_release_of_node(struct pci_dev *dev);
 627 void pci_set_bus_of_node(struct pci_bus *bus);
 628 void pci_release_bus_of_node(struct pci_bus *bus);
 629
 630 #else
 631 static inline int
 632 of_pci_parse_bus_range(struct device_node *node, struct resource *res)
 633 {
 634         return -EINVAL;
 635 }
 636
 637 static inline int
 638 of_get_pci_domain_nr(struct device_node *node)
 639 {
 640         return -1;
 641 }
 642
 643 static inline int
 644 of_pci_get_max_link_speed(struct device_node *node)
 645 {
 646         return -EINVAL;
 647 }
 648
 649 static inline void pci_set_of_node(struct pci_dev *dev) { }
 650 static inline void pci_release_of_node(struct pci_dev *dev) { }
 651 static inline void pci_set_bus_of_node(struct pci_bus *bus) { }
 652 static inline void pci_release_bus_of_node(struct pci_bus *bus) { }
 653 #endif /* CONFIG_OF */
 654
 655 #ifdef CONFIG_PCIEAER
 656 void pci_no_aer(void);
 657 void pci_aer_init(struct pci_dev *dev);
 658 void pci_aer_exit(struct pci_dev *dev);
 659 extern const struct attribute_group aer_stats_attr_group;
 660 void pci_aer_clear_fatal_status(struct pci_dev *dev);
 661 void pci_aer_clear_device_status(struct pci_dev *dev);
 662 int pci_aer_clear_status(struct pci_dev *dev);
 663 int pci_aer_raw_clear_status(struct pci_dev *dev);
 664 #else
 665 static inline void pci_no_aer(void) { }
 666 static inline void pci_aer_init(struct pci_dev *d) { }
 667 static inline void pci_aer_exit(struct pci_dev *d) { }
 668 static inline void pci_aer_clear_fatal_status(struct pci_dev *dev) { }
 669 static inline void pci_aer_clear_device_status(struct pci_dev *dev) { }
 670 static inline int pci_aer_clear_status(struct pci_dev *dev) { return -EINVAL; }
 671 static inline int pci_aer_raw_clear_status(struct pci_dev *dev) { return -EINVAL; }
 672 #endif
 673
 674 #ifdef CONFIG_ACPI
 675 int pci_acpi_program_hp_params(struct pci_dev *dev);
 676 #else
 677 static inline int pci_acpi_program_hp_params(struct pci_dev *dev)
 678 {
 679         return -ENODEV;
 680 }
 681 #endif
 682
 683 #ifdef CONFIG_PCIEASPM
 684 extern const struct attribute_group aspm_ctrl_attr_group;
 685 #endif
 686
 687 #endif /* DRIVERS_PCI_H */