1 /* SPDX-License-Identifier: GPL-2.0 */
7 /* Number of possible devfns: 0.0 to 1f.7 inclusive */
8 #define MAX_NR_DEVFNS 256
10 #define PCI_FIND_CAP_TTL 48
12 #define PCI_VSEC_ID_INTEL_TBT 0x1234 /* Thunderbolt */
14 #define PCIE_LINK_RETRAIN_TIMEOUT_MS 1000
16 /* Power stable to PERST# inactive from PCIe card Electromechanical Spec */
17 #define PCIE_T_PVPERL_MS 100
20 * PCIe r6.0, sec 5.3.3.2.1 <PME Synchronization>
21 * Recommends 1ms to 10ms timeout to check L2 ready.
23 #define PCIE_PME_TO_L2_TIMEOUT_US 10000
25 extern const unsigned char pcie_link_speed[];
26 extern bool pci_early_dump;
28 bool pcie_cap_has_lnkctl(const struct pci_dev *dev);
29 bool pcie_cap_has_lnkctl2(const struct pci_dev *dev);
30 bool pcie_cap_has_rtctl(const struct pci_dev *dev);
32 /* Functions internal to the PCI core code */
35 extern const struct attribute_group pci_dev_smbios_attr_group;
39 PCI_MMAP_SYSFS, /* mmap on /sys/bus/pci/devices/<BDF>/resource<N> */
40 PCI_MMAP_PROCFS /* mmap on /proc/bus/pci/<BDF> */
42 int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vmai,
43 enum pci_mmap_api mmap_api);
45 bool pci_reset_supported(struct pci_dev *dev);
46 void pci_init_reset_methods(struct pci_dev *dev);
47 int pci_bridge_secondary_bus_reset(struct pci_dev *dev);
48 int pci_bus_error_reset(struct pci_dev *dev);
50 struct pci_cap_saved_data {
57 struct pci_cap_saved_state {
58 struct hlist_node next;
59 struct pci_cap_saved_data cap;
62 void pci_allocate_cap_save_buffers(struct pci_dev *dev);
63 void pci_free_cap_save_buffers(struct pci_dev *dev);
64 int pci_add_cap_save_buffer(struct pci_dev *dev, char cap, unsigned int size);
65 int pci_add_ext_cap_save_buffer(struct pci_dev *dev,
66 u16 cap, unsigned int size);
67 struct pci_cap_saved_state *pci_find_saved_cap(struct pci_dev *dev, char cap);
68 struct pci_cap_saved_state *pci_find_saved_ext_cap(struct pci_dev *dev,
71 #define PCI_PM_D2_DELAY 200 /* usec; see PCIe r4.0, sec 5.9.1 */
72 #define PCI_PM_D3HOT_WAIT 10 /* msec */
73 #define PCI_PM_D3COLD_WAIT 100 /* msec */
75 void pci_update_current_state(struct pci_dev *dev, pci_power_t state);
76 void pci_refresh_power_state(struct pci_dev *dev);
77 int pci_power_up(struct pci_dev *dev);
78 void pci_disable_enabled_device(struct pci_dev *dev);
79 int pci_finish_runtime_suspend(struct pci_dev *dev);
80 void pcie_clear_device_status(struct pci_dev *dev);
81 void pcie_clear_root_pme_status(struct pci_dev *dev);
82 bool pci_check_pme_status(struct pci_dev *dev);
83 void pci_pme_wakeup_bus(struct pci_bus *bus);
84 int __pci_pme_wakeup(struct pci_dev *dev, void *ign);
85 void pci_pme_restore(struct pci_dev *dev);
86 bool pci_dev_need_resume(struct pci_dev *dev);
87 void pci_dev_adjust_pme(struct pci_dev *dev);
88 void pci_dev_complete_resume(struct pci_dev *pci_dev);
89 void pci_config_pm_runtime_get(struct pci_dev *dev);
90 void pci_config_pm_runtime_put(struct pci_dev *dev);
91 void pci_pm_init(struct pci_dev *dev);
92 void pci_ea_init(struct pci_dev *dev);
93 void pci_msi_init(struct pci_dev *dev);
94 void pci_msix_init(struct pci_dev *dev);
95 bool pci_bridge_d3_possible(struct pci_dev *dev);
96 void pci_bridge_d3_update(struct pci_dev *dev);
97 int pci_bridge_wait_for_secondary_bus(struct pci_dev *dev, char *reset_type);
99 static inline void pci_wakeup_event(struct pci_dev *dev)
101 /* Wait 100 ms before the system can be put into a sleep state. */
102 pm_wakeup_event(&dev->dev, 100);
105 static inline bool pci_has_subordinate(struct pci_dev *pci_dev)
107 return !!(pci_dev->subordinate);
110 static inline bool pci_power_manageable(struct pci_dev *pci_dev)
113 * Currently we allow normal PCI devices and PCI bridges transition
114 * into D3 if their bridge_d3 is set.
116 return !pci_has_subordinate(pci_dev) || pci_dev->bridge_d3;
119 static inline bool pcie_downstream_port(const struct pci_dev *dev)
121 int type = pci_pcie_type(dev);
123 return type == PCI_EXP_TYPE_ROOT_PORT ||
124 type == PCI_EXP_TYPE_DOWNSTREAM ||
125 type == PCI_EXP_TYPE_PCIE_BRIDGE;
128 void pci_vpd_init(struct pci_dev *dev);
129 void pci_vpd_release(struct pci_dev *dev);
130 extern const struct attribute_group pci_dev_vpd_attr_group;
132 /* PCI Virtual Channel */
133 int pci_save_vc_state(struct pci_dev *dev);
134 void pci_restore_vc_state(struct pci_dev *dev);
135 void pci_allocate_vc_save_buffers(struct pci_dev *dev);
137 /* PCI /proc functions */
138 #ifdef CONFIG_PROC_FS
139 int pci_proc_attach_device(struct pci_dev *dev);
140 int pci_proc_detach_device(struct pci_dev *dev);
141 int pci_proc_detach_bus(struct pci_bus *bus);
143 static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; }
144 static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; }
145 static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
148 /* Functions for PCI Hotplug drivers to use */
149 int pci_hp_add_bridge(struct pci_dev *dev);
151 #if defined(CONFIG_SYSFS) && defined(HAVE_PCI_LEGACY)
152 void pci_create_legacy_files(struct pci_bus *bus);
153 void pci_remove_legacy_files(struct pci_bus *bus);
155 static inline void pci_create_legacy_files(struct pci_bus *bus) { }
156 static inline void pci_remove_legacy_files(struct pci_bus *bus) { }
159 /* Lock for read/write access to pci device and bus lists */
160 extern struct rw_semaphore pci_bus_sem;
161 extern struct mutex pci_slot_mutex;
163 extern raw_spinlock_t pci_lock;
165 extern unsigned int pci_pm_d3hot_delay;
167 #ifdef CONFIG_PCI_MSI
168 void pci_no_msi(void);
170 static inline void pci_no_msi(void) { }
173 void pci_realloc_get_opt(char *);
175 static inline int pci_no_d1d2(struct pci_dev *dev)
177 unsigned int parent_dstates = 0;
180 parent_dstates = dev->bus->self->no_d1d2;
181 return (dev->no_d1d2 || parent_dstates);
186 int pci_create_sysfs_dev_files(struct pci_dev *pdev);
187 void pci_remove_sysfs_dev_files(struct pci_dev *pdev);
188 extern const struct attribute_group *pci_dev_groups[];
189 extern const struct attribute_group *pci_dev_attr_groups[];
190 extern const struct attribute_group *pcibus_groups[];
191 extern const struct attribute_group *pci_bus_groups[];
193 static inline int pci_create_sysfs_dev_files(struct pci_dev *pdev) { return 0; }
194 static inline void pci_remove_sysfs_dev_files(struct pci_dev *pdev) { }
195 #define pci_dev_groups NULL
196 #define pci_dev_attr_groups NULL
197 #define pcibus_groups NULL
198 #define pci_bus_groups NULL
201 extern unsigned long pci_hotplug_io_size;
202 extern unsigned long pci_hotplug_mmio_size;
203 extern unsigned long pci_hotplug_mmio_pref_size;
204 extern unsigned long pci_hotplug_bus_size;
207 * pci_match_one_device - Tell if a PCI device structure has a matching
208 * PCI device id structure
209 * @id: single PCI device id structure to match
210 * @dev: the PCI device structure to match against
212 * Returns the matching pci_device_id structure or %NULL if there is no match.
214 static inline const struct pci_device_id *
215 pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev)
217 if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) &&
218 (id->device == PCI_ANY_ID || id->device == dev->device) &&
219 (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) &&
220 (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) &&
221 !((id->class ^ dev->class) & id->class_mask))
226 /* PCI slot sysfs helper code */
227 #define to_pci_slot(s) container_of(s, struct pci_slot, kobj)
229 extern struct kset *pci_slots_kset;
231 struct pci_slot_attribute {
232 struct attribute attr;
233 ssize_t (*show)(struct pci_slot *, char *);
234 ssize_t (*store)(struct pci_slot *, const char *, size_t);
236 #define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)
239 pci_bar_unknown, /* Standard PCI BAR probe */
240 pci_bar_io, /* An I/O port BAR */
241 pci_bar_mem32, /* A 32-bit memory BAR */
242 pci_bar_mem64, /* A 64-bit memory BAR */
245 struct device *pci_get_host_bridge_device(struct pci_dev *dev);
246 void pci_put_host_bridge_device(struct device *dev);
248 int pci_configure_extended_tags(struct pci_dev *dev, void *ign);
249 bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
251 bool pci_bus_generic_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
253 int pci_idt_bus_quirk(struct pci_bus *bus, int devfn, u32 *pl, int crs_timeout);
255 int pci_setup_device(struct pci_dev *dev);
256 int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
257 struct resource *res, unsigned int reg);
258 void pci_configure_ari(struct pci_dev *dev);
259 void __pci_bus_size_bridges(struct pci_bus *bus,
260 struct list_head *realloc_head);
261 void __pci_bus_assign_resources(const struct pci_bus *bus,
262 struct list_head *realloc_head,
263 struct list_head *fail_head);
264 bool pci_bus_clip_resource(struct pci_dev *dev, int idx);
266 const char *pci_resource_name(struct pci_dev *dev, unsigned int i);
268 void pci_reassigndev_resource_alignment(struct pci_dev *dev);
269 void pci_disable_bridge_window(struct pci_dev *dev);
270 struct pci_bus *pci_bus_get(struct pci_bus *bus);
271 void pci_bus_put(struct pci_bus *bus);
273 /* PCIe link information from Link Capabilities 2 */
274 #define PCIE_LNKCAP2_SLS2SPEED(lnkcap2) \
275 ((lnkcap2) & PCI_EXP_LNKCAP2_SLS_64_0GB ? PCIE_SPEED_64_0GT : \
276 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_32_0GB ? PCIE_SPEED_32_0GT : \
277 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_16_0GB ? PCIE_SPEED_16_0GT : \
278 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_8_0GB ? PCIE_SPEED_8_0GT : \
279 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_5_0GB ? PCIE_SPEED_5_0GT : \
280 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_2_5GB ? PCIE_SPEED_2_5GT : \
283 /* PCIe speed to Mb/s reduced by encoding overhead */
284 #define PCIE_SPEED2MBS_ENC(speed) \
285 ((speed) == PCIE_SPEED_64_0GT ? 64000*1/1 : \
286 (speed) == PCIE_SPEED_32_0GT ? 32000*128/130 : \
287 (speed) == PCIE_SPEED_16_0GT ? 16000*128/130 : \
288 (speed) == PCIE_SPEED_8_0GT ? 8000*128/130 : \
289 (speed) == PCIE_SPEED_5_0GT ? 5000*8/10 : \
290 (speed) == PCIE_SPEED_2_5GT ? 2500*8/10 : \
293 const char *pci_speed_string(enum pci_bus_speed speed);
294 enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev);
295 enum pcie_link_width pcie_get_width_cap(struct pci_dev *dev);
296 u32 pcie_bandwidth_capable(struct pci_dev *dev, enum pci_bus_speed *speed,
297 enum pcie_link_width *width);
298 void __pcie_print_link_status(struct pci_dev *dev, bool verbose);
299 void pcie_report_downtraining(struct pci_dev *dev);
300 void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
302 /* Single Root I/O Virtualization */
304 int pos; /* Capability position */
305 int nres; /* Number of resources */
306 u32 cap; /* SR-IOV Capabilities */
307 u16 ctrl; /* SR-IOV Control */
308 u16 total_VFs; /* Total VFs associated with the PF */
309 u16 initial_VFs; /* Initial VFs associated with the PF */
310 u16 num_VFs; /* Number of VFs available */
311 u16 offset; /* First VF Routing ID offset */
312 u16 stride; /* Following VF stride */
313 u16 vf_device; /* VF device ID */
314 u32 pgsz; /* Page size for BAR alignment */
315 u8 link; /* Function Dependency Link */
316 u8 max_VF_buses; /* Max buses consumed by VFs */
317 u16 driver_max_VFs; /* Max num VFs driver supports */
318 struct pci_dev *dev; /* Lowest numbered PF */
319 struct pci_dev *self; /* This PF */
320 u32 class; /* VF device */
321 u8 hdr_type; /* VF header type */
322 u16 subsystem_vendor; /* VF subsystem vendor */
323 u16 subsystem_device; /* VF subsystem device */
324 resource_size_t barsz[PCI_SRIOV_NUM_BARS]; /* VF BAR size */
325 bool drivers_autoprobe; /* Auto probing of VFs by driver */
328 #ifdef CONFIG_PCI_DOE
329 void pci_doe_init(struct pci_dev *pdev);
330 void pci_doe_destroy(struct pci_dev *pdev);
331 void pci_doe_disconnected(struct pci_dev *pdev);
333 static inline void pci_doe_init(struct pci_dev *pdev) { }
334 static inline void pci_doe_destroy(struct pci_dev *pdev) { }
335 static inline void pci_doe_disconnected(struct pci_dev *pdev) { }
339 * pci_dev_set_io_state - Set the new error state if possible.
341 * @dev: PCI device to set new error_state
342 * @new: the state we want dev to be in
344 * If the device is experiencing perm_failure, it has to remain in that state.
345 * Any other transition is allowed.
347 * Returns true if state has been changed to the requested state.
349 static inline bool pci_dev_set_io_state(struct pci_dev *dev,
350 pci_channel_state_t new)
352 pci_channel_state_t old;
355 case pci_channel_io_perm_failure:
356 xchg(&dev->error_state, pci_channel_io_perm_failure);
358 case pci_channel_io_frozen:
359 old = cmpxchg(&dev->error_state, pci_channel_io_normal,
360 pci_channel_io_frozen);
361 return old != pci_channel_io_perm_failure;
362 case pci_channel_io_normal:
363 old = cmpxchg(&dev->error_state, pci_channel_io_frozen,
364 pci_channel_io_normal);
365 return old != pci_channel_io_perm_failure;
371 static inline int pci_dev_set_disconnected(struct pci_dev *dev, void *unused)
373 pci_dev_set_io_state(dev, pci_channel_io_perm_failure);
374 pci_doe_disconnected(dev);
379 /* pci_dev priv_flags */
380 #define PCI_DEV_ADDED 0
381 #define PCI_DPC_RECOVERED 1
382 #define PCI_DPC_RECOVERING 2
384 static inline void pci_dev_assign_added(struct pci_dev *dev, bool added)
386 assign_bit(PCI_DEV_ADDED, &dev->priv_flags, added);
389 static inline bool pci_dev_is_added(const struct pci_dev *dev)
391 return test_bit(PCI_DEV_ADDED, &dev->priv_flags);
394 #ifdef CONFIG_PCIEAER
395 #include <linux/aer.h>
397 #define AER_MAX_MULTI_ERR_DEVICES 5 /* Not likely to have more */
399 struct aer_err_info {
400 struct pci_dev *dev[AER_MAX_MULTI_ERR_DEVICES];
405 unsigned int severity:2; /* 0:NONFATAL | 1:FATAL | 2:COR */
406 unsigned int __pad1:5;
407 unsigned int multi_error_valid:1;
409 unsigned int first_error:5;
410 unsigned int __pad2:2;
411 unsigned int tlp_header_valid:1;
413 unsigned int status; /* COR/UNCOR Error Status */
414 unsigned int mask; /* COR/UNCOR Error Mask */
415 struct pcie_tlp_log tlp; /* TLP Header */
418 int aer_get_device_error_info(struct pci_dev *dev, struct aer_err_info *info);
419 void aer_print_error(struct pci_dev *dev, struct aer_err_info *info);
420 #endif /* CONFIG_PCIEAER */
422 #ifdef CONFIG_PCIEPORTBUS
423 /* Cached RCEC Endpoint Association */
431 #ifdef CONFIG_PCIE_DPC
432 void pci_save_dpc_state(struct pci_dev *dev);
433 void pci_restore_dpc_state(struct pci_dev *dev);
434 void pci_dpc_init(struct pci_dev *pdev);
435 void dpc_process_error(struct pci_dev *pdev);
436 pci_ers_result_t dpc_reset_link(struct pci_dev *pdev);
437 bool pci_dpc_recovered(struct pci_dev *pdev);
439 static inline void pci_save_dpc_state(struct pci_dev *dev) { }
440 static inline void pci_restore_dpc_state(struct pci_dev *dev) { }
441 static inline void pci_dpc_init(struct pci_dev *pdev) { }
442 static inline bool pci_dpc_recovered(struct pci_dev *pdev) { return false; }
445 #ifdef CONFIG_PCIEPORTBUS
446 void pci_rcec_init(struct pci_dev *dev);
447 void pci_rcec_exit(struct pci_dev *dev);
448 void pcie_link_rcec(struct pci_dev *rcec);
449 void pcie_walk_rcec(struct pci_dev *rcec,
450 int (*cb)(struct pci_dev *, void *),
453 static inline void pci_rcec_init(struct pci_dev *dev) { }
454 static inline void pci_rcec_exit(struct pci_dev *dev) { }
455 static inline void pcie_link_rcec(struct pci_dev *rcec) { }
456 static inline void pcie_walk_rcec(struct pci_dev *rcec,
457 int (*cb)(struct pci_dev *, void *),
461 #ifdef CONFIG_PCI_ATS
462 /* Address Translation Service */
463 void pci_ats_init(struct pci_dev *dev);
464 void pci_restore_ats_state(struct pci_dev *dev);
466 static inline void pci_ats_init(struct pci_dev *d) { }
467 static inline void pci_restore_ats_state(struct pci_dev *dev) { }
468 #endif /* CONFIG_PCI_ATS */
470 #ifdef CONFIG_PCI_PRI
471 void pci_pri_init(struct pci_dev *dev);
472 void pci_restore_pri_state(struct pci_dev *pdev);
474 static inline void pci_pri_init(struct pci_dev *dev) { }
475 static inline void pci_restore_pri_state(struct pci_dev *pdev) { }
478 #ifdef CONFIG_PCI_PASID
479 void pci_pasid_init(struct pci_dev *dev);
480 void pci_restore_pasid_state(struct pci_dev *pdev);
482 static inline void pci_pasid_init(struct pci_dev *dev) { }
483 static inline void pci_restore_pasid_state(struct pci_dev *pdev) { }
486 #ifdef CONFIG_PCI_IOV
487 int pci_iov_init(struct pci_dev *dev);
488 void pci_iov_release(struct pci_dev *dev);
489 void pci_iov_remove(struct pci_dev *dev);
490 void pci_iov_update_resource(struct pci_dev *dev, int resno);
491 resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno);
492 void pci_restore_iov_state(struct pci_dev *dev);
493 int pci_iov_bus_range(struct pci_bus *bus);
494 extern const struct attribute_group sriov_pf_dev_attr_group;
495 extern const struct attribute_group sriov_vf_dev_attr_group;
497 static inline int pci_iov_init(struct pci_dev *dev)
501 static inline void pci_iov_release(struct pci_dev *dev) { }
502 static inline void pci_iov_remove(struct pci_dev *dev) { }
503 static inline void pci_restore_iov_state(struct pci_dev *dev) { }
504 static inline int pci_iov_bus_range(struct pci_bus *bus)
509 #endif /* CONFIG_PCI_IOV */
511 #ifdef CONFIG_PCIE_PTM
512 void pci_ptm_init(struct pci_dev *dev);
513 void pci_save_ptm_state(struct pci_dev *dev);
514 void pci_restore_ptm_state(struct pci_dev *dev);
515 void pci_suspend_ptm(struct pci_dev *dev);
516 void pci_resume_ptm(struct pci_dev *dev);
518 static inline void pci_ptm_init(struct pci_dev *dev) { }
519 static inline void pci_save_ptm_state(struct pci_dev *dev) { }
520 static inline void pci_restore_ptm_state(struct pci_dev *dev) { }
521 static inline void pci_suspend_ptm(struct pci_dev *dev) { }
522 static inline void pci_resume_ptm(struct pci_dev *dev) { }
525 unsigned long pci_cardbus_resource_alignment(struct resource *);
527 static inline resource_size_t pci_resource_alignment(struct pci_dev *dev,
528 struct resource *res)
530 #ifdef CONFIG_PCI_IOV
531 int resno = res - dev->resource;
533 if (resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END)
534 return pci_sriov_resource_alignment(dev, resno);
536 if (dev->class >> 8 == PCI_CLASS_BRIDGE_CARDBUS)
537 return pci_cardbus_resource_alignment(res);
538 return resource_alignment(res);
541 void pci_acs_init(struct pci_dev *dev);
542 #ifdef CONFIG_PCI_QUIRKS
543 int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags);
544 int pci_dev_specific_enable_acs(struct pci_dev *dev);
545 int pci_dev_specific_disable_acs_redir(struct pci_dev *dev);
546 bool pcie_failed_link_retrain(struct pci_dev *dev);
548 static inline int pci_dev_specific_acs_enabled(struct pci_dev *dev,
553 static inline int pci_dev_specific_enable_acs(struct pci_dev *dev)
557 static inline int pci_dev_specific_disable_acs_redir(struct pci_dev *dev)
561 static inline bool pcie_failed_link_retrain(struct pci_dev *dev)
567 /* PCI error reporting and recovery */
568 pci_ers_result_t pcie_do_recovery(struct pci_dev *dev,
569 pci_channel_state_t state,
570 pci_ers_result_t (*reset_subordinates)(struct pci_dev *pdev));
572 bool pcie_wait_for_link(struct pci_dev *pdev, bool active);
573 int pcie_retrain_link(struct pci_dev *pdev, bool use_lt);
575 /* ASPM-related functionality we need even without CONFIG_PCIEASPM */
576 void pci_save_ltr_state(struct pci_dev *dev);
577 void pci_restore_ltr_state(struct pci_dev *dev);
578 void pci_configure_aspm_l1ss(struct pci_dev *dev);
579 void pci_save_aspm_l1ss_state(struct pci_dev *dev);
580 void pci_restore_aspm_l1ss_state(struct pci_dev *dev);
582 #ifdef CONFIG_PCIEASPM
583 void pcie_aspm_init_link_state(struct pci_dev *pdev);
584 void pcie_aspm_exit_link_state(struct pci_dev *pdev);
585 void pcie_aspm_pm_state_change(struct pci_dev *pdev, bool locked);
586 void pcie_aspm_powersave_config_link(struct pci_dev *pdev);
587 void pci_configure_ltr(struct pci_dev *pdev);
588 void pci_bridge_reconfigure_ltr(struct pci_dev *pdev);
590 static inline void pcie_aspm_init_link_state(struct pci_dev *pdev) { }
591 static inline void pcie_aspm_exit_link_state(struct pci_dev *pdev) { }
592 static inline void pcie_aspm_pm_state_change(struct pci_dev *pdev, bool locked) { }
593 static inline void pcie_aspm_powersave_config_link(struct pci_dev *pdev) { }
594 static inline void pci_configure_ltr(struct pci_dev *pdev) { }
595 static inline void pci_bridge_reconfigure_ltr(struct pci_dev *pdev) { }
598 #ifdef CONFIG_PCIE_ECRC
599 void pcie_set_ecrc_checking(struct pci_dev *dev);
600 void pcie_ecrc_get_policy(char *str);
602 static inline void pcie_set_ecrc_checking(struct pci_dev *dev) { }
603 static inline void pcie_ecrc_get_policy(char *str) { }
606 struct pci_dev_reset_methods {
609 int (*reset)(struct pci_dev *dev, bool probe);
612 struct pci_reset_fn_method {
613 int (*reset_fn)(struct pci_dev *pdev, bool probe);
617 #ifdef CONFIG_PCI_QUIRKS
618 int pci_dev_specific_reset(struct pci_dev *dev, bool probe);
620 static inline int pci_dev_specific_reset(struct pci_dev *dev, bool probe)
626 #if defined(CONFIG_PCI_QUIRKS) && defined(CONFIG_ARM64)
627 int acpi_get_rc_resources(struct device *dev, const char *hid, u16 segment,
628 struct resource *res);
630 static inline int acpi_get_rc_resources(struct device *dev, const char *hid,
631 u16 segment, struct resource *res)
637 int pci_rebar_get_current_size(struct pci_dev *pdev, int bar);
638 int pci_rebar_set_size(struct pci_dev *pdev, int bar, int size);
639 static inline u64 pci_rebar_size_to_bytes(int size)
641 return 1ULL << (size + 20);
647 int of_pci_parse_bus_range(struct device_node *node, struct resource *res);
648 int of_get_pci_domain_nr(struct device_node *node);
649 int of_pci_get_max_link_speed(struct device_node *node);
650 u32 of_pci_get_slot_power_limit(struct device_node *node,
651 u8 *slot_power_limit_value,
652 u8 *slot_power_limit_scale);
653 int pci_set_of_node(struct pci_dev *dev);
654 void pci_release_of_node(struct pci_dev *dev);
655 void pci_set_bus_of_node(struct pci_bus *bus);
656 void pci_release_bus_of_node(struct pci_bus *bus);
658 int devm_of_pci_bridge_init(struct device *dev, struct pci_host_bridge *bridge);
662 of_pci_parse_bus_range(struct device_node *node, struct resource *res)
668 of_get_pci_domain_nr(struct device_node *node)
674 of_pci_get_max_link_speed(struct device_node *node)
680 of_pci_get_slot_power_limit(struct device_node *node,
681 u8 *slot_power_limit_value,
682 u8 *slot_power_limit_scale)
684 if (slot_power_limit_value)
685 *slot_power_limit_value = 0;
686 if (slot_power_limit_scale)
687 *slot_power_limit_scale = 0;
691 static inline int pci_set_of_node(struct pci_dev *dev) { return 0; }
692 static inline void pci_release_of_node(struct pci_dev *dev) { }
693 static inline void pci_set_bus_of_node(struct pci_bus *bus) { }
694 static inline void pci_release_bus_of_node(struct pci_bus *bus) { }
696 static inline int devm_of_pci_bridge_init(struct device *dev, struct pci_host_bridge *bridge)
701 #endif /* CONFIG_OF */
705 #ifdef CONFIG_PCI_DYNAMIC_OF_NODES
706 void of_pci_make_dev_node(struct pci_dev *pdev);
707 void of_pci_remove_node(struct pci_dev *pdev);
708 int of_pci_add_properties(struct pci_dev *pdev, struct of_changeset *ocs,
709 struct device_node *np);
711 static inline void of_pci_make_dev_node(struct pci_dev *pdev) { }
712 static inline void of_pci_remove_node(struct pci_dev *pdev) { }
715 #ifdef CONFIG_PCIEAER
716 void pci_no_aer(void);
717 void pci_aer_init(struct pci_dev *dev);
718 void pci_aer_exit(struct pci_dev *dev);
719 extern const struct attribute_group aer_stats_attr_group;
720 void pci_aer_clear_fatal_status(struct pci_dev *dev);
721 int pci_aer_clear_status(struct pci_dev *dev);
722 int pci_aer_raw_clear_status(struct pci_dev *dev);
723 void pci_save_aer_state(struct pci_dev *dev);
724 void pci_restore_aer_state(struct pci_dev *dev);
726 static inline void pci_no_aer(void) { }
727 static inline void pci_aer_init(struct pci_dev *d) { }
728 static inline void pci_aer_exit(struct pci_dev *d) { }
729 static inline void pci_aer_clear_fatal_status(struct pci_dev *dev) { }
730 static inline int pci_aer_clear_status(struct pci_dev *dev) { return -EINVAL; }
731 static inline int pci_aer_raw_clear_status(struct pci_dev *dev) { return -EINVAL; }
732 static inline void pci_save_aer_state(struct pci_dev *dev) { }
733 static inline void pci_restore_aer_state(struct pci_dev *dev) { }
737 int pci_acpi_program_hp_params(struct pci_dev *dev);
738 extern const struct attribute_group pci_dev_acpi_attr_group;
739 void pci_set_acpi_fwnode(struct pci_dev *dev);
740 int pci_dev_acpi_reset(struct pci_dev *dev, bool probe);
741 bool acpi_pci_power_manageable(struct pci_dev *dev);
742 bool acpi_pci_bridge_d3(struct pci_dev *dev);
743 int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state);
744 pci_power_t acpi_pci_get_power_state(struct pci_dev *dev);
745 void acpi_pci_refresh_power_state(struct pci_dev *dev);
746 int acpi_pci_wakeup(struct pci_dev *dev, bool enable);
747 bool acpi_pci_need_resume(struct pci_dev *dev);
748 pci_power_t acpi_pci_choose_state(struct pci_dev *pdev);
750 static inline int pci_dev_acpi_reset(struct pci_dev *dev, bool probe)
754 static inline void pci_set_acpi_fwnode(struct pci_dev *dev) { }
755 static inline int pci_acpi_program_hp_params(struct pci_dev *dev)
759 static inline bool acpi_pci_power_manageable(struct pci_dev *dev)
763 static inline bool acpi_pci_bridge_d3(struct pci_dev *dev)
767 static inline int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
771 static inline pci_power_t acpi_pci_get_power_state(struct pci_dev *dev)
775 static inline void acpi_pci_refresh_power_state(struct pci_dev *dev) { }
776 static inline int acpi_pci_wakeup(struct pci_dev *dev, bool enable)
780 static inline bool acpi_pci_need_resume(struct pci_dev *dev)
784 static inline pci_power_t acpi_pci_choose_state(struct pci_dev *pdev)
786 return PCI_POWER_ERROR;
790 #ifdef CONFIG_PCIEASPM
791 extern const struct attribute_group aspm_ctrl_attr_group;
794 extern const struct attribute_group pci_dev_reset_method_attr_group;
796 #ifdef CONFIG_X86_INTEL_MID
797 bool pci_use_mid_pm(void);
798 int mid_pci_set_power_state(struct pci_dev *pdev, pci_power_t state);
799 pci_power_t mid_pci_get_power_state(struct pci_dev *pdev);
801 static inline bool pci_use_mid_pm(void)
805 static inline int mid_pci_set_power_state(struct pci_dev *pdev, pci_power_t state)
809 static inline pci_power_t mid_pci_get_power_state(struct pci_dev *pdev)
816 * Managed PCI resources. This manages device on/off, INTx/MSI/MSI-X
817 * on/off and BAR regions. pci_dev itself records MSI/MSI-X status, so
818 * there's no need to track it separately. pci_devres is initialized
819 * when a device is enabled using managed PCI device enable interface.
821 * TODO: Struct pci_devres and find_pci_dr() only need to be here because
822 * they're used in pci.c. Port or move these functions to devres.c and
823 * then remove them from here.
826 unsigned int enabled:1;
827 unsigned int pinned:1;
828 unsigned int orig_intx:1;
829 unsigned int restore_intx:1;
834 struct pci_devres *find_pci_dr(struct pci_dev *pdev);
837 * Config Address for PCI Configuration Mechanism #1
839 * See PCI Local Bus Specification, Revision 3.0,
840 * Section 3.2.2.3.2, Figure 3-2, p. 50.
843 #define PCI_CONF1_BUS_SHIFT 16 /* Bus number */
844 #define PCI_CONF1_DEV_SHIFT 11 /* Device number */
845 #define PCI_CONF1_FUNC_SHIFT 8 /* Function number */
847 #define PCI_CONF1_BUS_MASK 0xff
848 #define PCI_CONF1_DEV_MASK 0x1f
849 #define PCI_CONF1_FUNC_MASK 0x7
850 #define PCI_CONF1_REG_MASK 0xfc /* Limit aligned offset to a maximum of 256B */
852 #define PCI_CONF1_ENABLE BIT(31)
853 #define PCI_CONF1_BUS(x) (((x) & PCI_CONF1_BUS_MASK) << PCI_CONF1_BUS_SHIFT)
854 #define PCI_CONF1_DEV(x) (((x) & PCI_CONF1_DEV_MASK) << PCI_CONF1_DEV_SHIFT)
855 #define PCI_CONF1_FUNC(x) (((x) & PCI_CONF1_FUNC_MASK) << PCI_CONF1_FUNC_SHIFT)
856 #define PCI_CONF1_REG(x) ((x) & PCI_CONF1_REG_MASK)
858 #define PCI_CONF1_ADDRESS(bus, dev, func, reg) \
859 (PCI_CONF1_ENABLE | \
860 PCI_CONF1_BUS(bus) | \
861 PCI_CONF1_DEV(dev) | \
862 PCI_CONF1_FUNC(func) | \
866 * Extension of PCI Config Address for accessing extended PCIe registers
868 * No standardized specification, but used on lot of non-ECAM-compliant ARM SoCs
869 * or on AMD Barcelona and new CPUs. Reserved bits [27:24] of PCI Config Address
870 * are used for specifying additional 4 high bits of PCI Express register.
873 #define PCI_CONF1_EXT_REG_SHIFT 16
874 #define PCI_CONF1_EXT_REG_MASK 0xf00
875 #define PCI_CONF1_EXT_REG(x) (((x) & PCI_CONF1_EXT_REG_MASK) << PCI_CONF1_EXT_REG_SHIFT)
877 #define PCI_CONF1_EXT_ADDRESS(bus, dev, func, reg) \
878 (PCI_CONF1_ADDRESS(bus, dev, func, reg) | \
879 PCI_CONF1_EXT_REG(reg))
881 #endif /* DRIVERS_PCI_H */