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
17 * Power stable to PERST# inactive.
19 * See the "Power Sequencing and Reset Signal Timings" table of the PCI Express
20 * Card Electromechanical Specification, Revision 5.1, Section 2.9.2, Symbol
23 #define PCIE_T_PVPERL_MS 100
26 * REFCLK stable before PERST# inactive.
28 * See the "Power Sequencing and Reset Signal Timings" table of the PCI Express
29 * Card Electromechanical Specification, Revision 5.1, Section 2.9.2, Symbol
32 #define PCIE_T_PERST_CLK_US 100
35 * End of conventional reset (PERST# de-asserted) to first configuration
36 * request (device able to respond with a "Request Retry Status" completion),
37 * from PCIe r6.0, sec 6.6.1.
39 #define PCIE_T_RRS_READY_MS 100
42 * PCIe r6.0, sec 5.3.3.2.1 <PME Synchronization>
43 * Recommends 1ms to 10ms timeout to check L2 ready.
45 #define PCIE_PME_TO_L2_TIMEOUT_US 10000
48 * PCIe r6.0, sec 6.6.1 <Conventional Reset>
50 * - "With a Downstream Port that does not support Link speeds greater
51 * than 5.0 GT/s, software must wait a minimum of 100 ms following exit
52 * from a Conventional Reset before sending a Configuration Request to
53 * the device immediately below that Port."
55 * - "With a Downstream Port that supports Link speeds greater than
56 * 5.0 GT/s, software must wait a minimum of 100 ms after Link training
57 * completes before sending a Configuration Request to the device
58 * immediately below that Port."
60 #define PCIE_RESET_CONFIG_DEVICE_WAIT_MS 100
62 /* Message Routing (r[2:0]); PCIe r6.0, sec 2.2.8 */
63 #define PCIE_MSG_TYPE_R_RC 0
64 #define PCIE_MSG_TYPE_R_ADDR 1
65 #define PCIE_MSG_TYPE_R_ID 2
66 #define PCIE_MSG_TYPE_R_BC 3
67 #define PCIE_MSG_TYPE_R_LOCAL 4
68 #define PCIE_MSG_TYPE_R_GATHER 5
70 /* Power Management Messages; PCIe r6.0, sec 2.2.8.2 */
71 #define PCIE_MSG_CODE_PME_TURN_OFF 0x19
73 /* INTx Mechanism Messages; PCIe r6.0, sec 2.2.8.1 */
74 #define PCIE_MSG_CODE_ASSERT_INTA 0x20
75 #define PCIE_MSG_CODE_ASSERT_INTB 0x21
76 #define PCIE_MSG_CODE_ASSERT_INTC 0x22
77 #define PCIE_MSG_CODE_ASSERT_INTD 0x23
78 #define PCIE_MSG_CODE_DEASSERT_INTA 0x24
79 #define PCIE_MSG_CODE_DEASSERT_INTB 0x25
80 #define PCIE_MSG_CODE_DEASSERT_INTC 0x26
81 #define PCIE_MSG_CODE_DEASSERT_INTD 0x27
83 extern const unsigned char pcie_link_speed[];
84 extern bool pci_early_dump;
86 bool pcie_cap_has_lnkctl(const struct pci_dev *dev);
87 bool pcie_cap_has_lnkctl2(const struct pci_dev *dev);
88 bool pcie_cap_has_rtctl(const struct pci_dev *dev);
90 /* Functions internal to the PCI core code */
93 extern const struct attribute_group pci_dev_smbios_attr_group;
97 PCI_MMAP_SYSFS, /* mmap on /sys/bus/pci/devices/<BDF>/resource<N> */
98 PCI_MMAP_PROCFS /* mmap on /proc/bus/pci/<BDF> */
100 int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vmai,
101 enum pci_mmap_api mmap_api);
103 bool pci_reset_supported(struct pci_dev *dev);
104 void pci_init_reset_methods(struct pci_dev *dev);
105 int pci_bridge_secondary_bus_reset(struct pci_dev *dev);
106 int pci_bus_error_reset(struct pci_dev *dev);
108 struct pci_cap_saved_data {
115 struct pci_cap_saved_state {
116 struct hlist_node next;
117 struct pci_cap_saved_data cap;
120 void pci_allocate_cap_save_buffers(struct pci_dev *dev);
121 void pci_free_cap_save_buffers(struct pci_dev *dev);
122 int pci_add_cap_save_buffer(struct pci_dev *dev, char cap, unsigned int size);
123 int pci_add_ext_cap_save_buffer(struct pci_dev *dev,
124 u16 cap, unsigned int size);
125 struct pci_cap_saved_state *pci_find_saved_cap(struct pci_dev *dev, char cap);
126 struct pci_cap_saved_state *pci_find_saved_ext_cap(struct pci_dev *dev,
129 #define PCI_PM_D2_DELAY 200 /* usec; see PCIe r4.0, sec 5.9.1 */
130 #define PCI_PM_D3HOT_WAIT 10 /* msec */
131 #define PCI_PM_D3COLD_WAIT 100 /* msec */
133 void pci_update_current_state(struct pci_dev *dev, pci_power_t state);
134 void pci_refresh_power_state(struct pci_dev *dev);
135 int pci_power_up(struct pci_dev *dev);
136 void pci_disable_enabled_device(struct pci_dev *dev);
137 int pci_finish_runtime_suspend(struct pci_dev *dev);
138 void pcie_clear_device_status(struct pci_dev *dev);
139 void pcie_clear_root_pme_status(struct pci_dev *dev);
140 bool pci_check_pme_status(struct pci_dev *dev);
141 void pci_pme_wakeup_bus(struct pci_bus *bus);
142 void pci_pme_restore(struct pci_dev *dev);
143 bool pci_dev_need_resume(struct pci_dev *dev);
144 void pci_dev_adjust_pme(struct pci_dev *dev);
145 void pci_dev_complete_resume(struct pci_dev *pci_dev);
146 void pci_config_pm_runtime_get(struct pci_dev *dev);
147 void pci_config_pm_runtime_put(struct pci_dev *dev);
148 void pci_pm_init(struct pci_dev *dev);
149 void pci_ea_init(struct pci_dev *dev);
150 void pci_msi_init(struct pci_dev *dev);
151 void pci_msix_init(struct pci_dev *dev);
152 bool pci_bridge_d3_possible(struct pci_dev *dev);
153 void pci_bridge_d3_update(struct pci_dev *dev);
154 int pci_bridge_wait_for_secondary_bus(struct pci_dev *dev, char *reset_type);
156 static inline bool pci_bus_rrs_vendor_id(u32 l)
158 return (l & 0xffff) == PCI_VENDOR_ID_PCI_SIG;
161 static inline void pci_wakeup_event(struct pci_dev *dev)
163 /* Wait 100 ms before the system can be put into a sleep state. */
164 pm_wakeup_event(&dev->dev, 100);
167 static inline bool pci_has_subordinate(struct pci_dev *pci_dev)
169 return !!(pci_dev->subordinate);
172 static inline bool pci_power_manageable(struct pci_dev *pci_dev)
175 * Currently we allow normal PCI devices and PCI bridges transition
176 * into D3 if their bridge_d3 is set.
178 return !pci_has_subordinate(pci_dev) || pci_dev->bridge_d3;
181 static inline bool pcie_downstream_port(const struct pci_dev *dev)
183 int type = pci_pcie_type(dev);
185 return type == PCI_EXP_TYPE_ROOT_PORT ||
186 type == PCI_EXP_TYPE_DOWNSTREAM ||
187 type == PCI_EXP_TYPE_PCIE_BRIDGE;
190 void pci_vpd_init(struct pci_dev *dev);
191 extern const struct attribute_group pci_dev_vpd_attr_group;
193 /* PCI Virtual Channel */
194 int pci_save_vc_state(struct pci_dev *dev);
195 void pci_restore_vc_state(struct pci_dev *dev);
196 void pci_allocate_vc_save_buffers(struct pci_dev *dev);
198 /* PCI /proc functions */
199 #ifdef CONFIG_PROC_FS
200 int pci_proc_attach_device(struct pci_dev *dev);
201 int pci_proc_detach_device(struct pci_dev *dev);
202 int pci_proc_detach_bus(struct pci_bus *bus);
204 static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; }
205 static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; }
206 static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
209 /* Functions for PCI Hotplug drivers to use */
210 int pci_hp_add_bridge(struct pci_dev *dev);
212 #if defined(CONFIG_SYSFS) && defined(HAVE_PCI_LEGACY)
213 void pci_create_legacy_files(struct pci_bus *bus);
214 void pci_remove_legacy_files(struct pci_bus *bus);
216 static inline void pci_create_legacy_files(struct pci_bus *bus) { }
217 static inline void pci_remove_legacy_files(struct pci_bus *bus) { }
220 /* Lock for read/write access to pci device and bus lists */
221 extern struct rw_semaphore pci_bus_sem;
222 extern struct mutex pci_slot_mutex;
224 extern raw_spinlock_t pci_lock;
226 extern unsigned int pci_pm_d3hot_delay;
228 #ifdef CONFIG_PCI_MSI
229 void pci_no_msi(void);
231 static inline void pci_no_msi(void) { }
234 void pci_realloc_get_opt(char *);
236 static inline int pci_no_d1d2(struct pci_dev *dev)
238 unsigned int parent_dstates = 0;
241 parent_dstates = dev->bus->self->no_d1d2;
242 return (dev->no_d1d2 || parent_dstates);
247 int pci_create_sysfs_dev_files(struct pci_dev *pdev);
248 void pci_remove_sysfs_dev_files(struct pci_dev *pdev);
249 extern const struct attribute_group *pci_dev_groups[];
250 extern const struct attribute_group *pci_dev_attr_groups[];
251 extern const struct attribute_group *pcibus_groups[];
252 extern const struct attribute_group *pci_bus_groups[];
254 static inline int pci_create_sysfs_dev_files(struct pci_dev *pdev) { return 0; }
255 static inline void pci_remove_sysfs_dev_files(struct pci_dev *pdev) { }
256 #define pci_dev_groups NULL
257 #define pci_dev_attr_groups NULL
258 #define pcibus_groups NULL
259 #define pci_bus_groups NULL
262 extern unsigned long pci_hotplug_io_size;
263 extern unsigned long pci_hotplug_mmio_size;
264 extern unsigned long pci_hotplug_mmio_pref_size;
265 extern unsigned long pci_hotplug_bus_size;
268 * pci_match_one_device - Tell if a PCI device structure has a matching
269 * PCI device id structure
270 * @id: single PCI device id structure to match
271 * @dev: the PCI device structure to match against
273 * Returns the matching pci_device_id structure or %NULL if there is no match.
275 static inline const struct pci_device_id *
276 pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev)
278 if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) &&
279 (id->device == PCI_ANY_ID || id->device == dev->device) &&
280 (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) &&
281 (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) &&
282 !((id->class ^ dev->class) & id->class_mask))
287 /* PCI slot sysfs helper code */
288 #define to_pci_slot(s) container_of(s, struct pci_slot, kobj)
290 extern struct kset *pci_slots_kset;
292 struct pci_slot_attribute {
293 struct attribute attr;
294 ssize_t (*show)(struct pci_slot *, char *);
295 ssize_t (*store)(struct pci_slot *, const char *, size_t);
297 #define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)
300 pci_bar_unknown, /* Standard PCI BAR probe */
301 pci_bar_io, /* An I/O port BAR */
302 pci_bar_mem32, /* A 32-bit memory BAR */
303 pci_bar_mem64, /* A 64-bit memory BAR */
306 struct device *pci_get_host_bridge_device(struct pci_dev *dev);
307 void pci_put_host_bridge_device(struct device *dev);
309 int pci_configure_extended_tags(struct pci_dev *dev, void *ign);
310 bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
312 bool pci_bus_generic_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
314 int pci_idt_bus_quirk(struct pci_bus *bus, int devfn, u32 *pl, int rrs_timeout);
316 int pci_setup_device(struct pci_dev *dev);
317 int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
318 struct resource *res, unsigned int reg);
319 void pci_configure_ari(struct pci_dev *dev);
320 void __pci_bus_size_bridges(struct pci_bus *bus,
321 struct list_head *realloc_head);
322 void __pci_bus_assign_resources(const struct pci_bus *bus,
323 struct list_head *realloc_head,
324 struct list_head *fail_head);
325 bool pci_bus_clip_resource(struct pci_dev *dev, int idx);
327 const char *pci_resource_name(struct pci_dev *dev, unsigned int i);
329 void pci_reassigndev_resource_alignment(struct pci_dev *dev);
330 void pci_disable_bridge_window(struct pci_dev *dev);
331 struct pci_bus *pci_bus_get(struct pci_bus *bus);
332 void pci_bus_put(struct pci_bus *bus);
334 /* PCIe link information from Link Capabilities 2 */
335 #define PCIE_LNKCAP2_SLS2SPEED(lnkcap2) \
336 ((lnkcap2) & PCI_EXP_LNKCAP2_SLS_64_0GB ? PCIE_SPEED_64_0GT : \
337 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_32_0GB ? PCIE_SPEED_32_0GT : \
338 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_16_0GB ? PCIE_SPEED_16_0GT : \
339 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_8_0GB ? PCIE_SPEED_8_0GT : \
340 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_5_0GB ? PCIE_SPEED_5_0GT : \
341 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_2_5GB ? PCIE_SPEED_2_5GT : \
344 /* PCIe speed to Mb/s reduced by encoding overhead */
345 #define PCIE_SPEED2MBS_ENC(speed) \
346 ((speed) == PCIE_SPEED_64_0GT ? 64000*1/1 : \
347 (speed) == PCIE_SPEED_32_0GT ? 32000*128/130 : \
348 (speed) == PCIE_SPEED_16_0GT ? 16000*128/130 : \
349 (speed) == PCIE_SPEED_8_0GT ? 8000*128/130 : \
350 (speed) == PCIE_SPEED_5_0GT ? 5000*8/10 : \
351 (speed) == PCIE_SPEED_2_5GT ? 2500*8/10 : \
354 static inline int pcie_dev_speed_mbps(enum pci_bus_speed speed)
357 case PCIE_SPEED_2_5GT:
359 case PCIE_SPEED_5_0GT:
361 case PCIE_SPEED_8_0GT:
363 case PCIE_SPEED_16_0GT:
365 case PCIE_SPEED_32_0GT:
367 case PCIE_SPEED_64_0GT:
376 const char *pci_speed_string(enum pci_bus_speed speed);
377 enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev);
378 enum pcie_link_width pcie_get_width_cap(struct pci_dev *dev);
379 void __pcie_print_link_status(struct pci_dev *dev, bool verbose);
380 void pcie_report_downtraining(struct pci_dev *dev);
381 void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
383 /* Single Root I/O Virtualization */
385 int pos; /* Capability position */
386 int nres; /* Number of resources */
387 u32 cap; /* SR-IOV Capabilities */
388 u16 ctrl; /* SR-IOV Control */
389 u16 total_VFs; /* Total VFs associated with the PF */
390 u16 initial_VFs; /* Initial VFs associated with the PF */
391 u16 num_VFs; /* Number of VFs available */
392 u16 offset; /* First VF Routing ID offset */
393 u16 stride; /* Following VF stride */
394 u16 vf_device; /* VF device ID */
395 u32 pgsz; /* Page size for BAR alignment */
396 u8 link; /* Function Dependency Link */
397 u8 max_VF_buses; /* Max buses consumed by VFs */
398 u16 driver_max_VFs; /* Max num VFs driver supports */
399 struct pci_dev *dev; /* Lowest numbered PF */
400 struct pci_dev *self; /* This PF */
401 u32 class; /* VF device */
402 u8 hdr_type; /* VF header type */
403 u16 subsystem_vendor; /* VF subsystem vendor */
404 u16 subsystem_device; /* VF subsystem device */
405 resource_size_t barsz[PCI_SRIOV_NUM_BARS]; /* VF BAR size */
406 bool drivers_autoprobe; /* Auto probing of VFs by driver */
409 #ifdef CONFIG_PCI_DOE
410 void pci_doe_init(struct pci_dev *pdev);
411 void pci_doe_destroy(struct pci_dev *pdev);
412 void pci_doe_disconnected(struct pci_dev *pdev);
414 static inline void pci_doe_init(struct pci_dev *pdev) { }
415 static inline void pci_doe_destroy(struct pci_dev *pdev) { }
416 static inline void pci_doe_disconnected(struct pci_dev *pdev) { }
419 #ifdef CONFIG_PCI_NPEM
420 void pci_npem_create(struct pci_dev *dev);
421 void pci_npem_remove(struct pci_dev *dev);
423 static inline void pci_npem_create(struct pci_dev *dev) { }
424 static inline void pci_npem_remove(struct pci_dev *dev) { }
428 * pci_dev_set_io_state - Set the new error state if possible.
430 * @dev: PCI device to set new error_state
431 * @new: the state we want dev to be in
433 * If the device is experiencing perm_failure, it has to remain in that state.
434 * Any other transition is allowed.
436 * Returns true if state has been changed to the requested state.
438 static inline bool pci_dev_set_io_state(struct pci_dev *dev,
439 pci_channel_state_t new)
441 pci_channel_state_t old;
444 case pci_channel_io_perm_failure:
445 xchg(&dev->error_state, pci_channel_io_perm_failure);
447 case pci_channel_io_frozen:
448 old = cmpxchg(&dev->error_state, pci_channel_io_normal,
449 pci_channel_io_frozen);
450 return old != pci_channel_io_perm_failure;
451 case pci_channel_io_normal:
452 old = cmpxchg(&dev->error_state, pci_channel_io_frozen,
453 pci_channel_io_normal);
454 return old != pci_channel_io_perm_failure;
460 static inline int pci_dev_set_disconnected(struct pci_dev *dev, void *unused)
462 pci_dev_set_io_state(dev, pci_channel_io_perm_failure);
463 pci_doe_disconnected(dev);
468 /* pci_dev priv_flags */
469 #define PCI_DEV_ADDED 0
470 #define PCI_DPC_RECOVERED 1
471 #define PCI_DPC_RECOVERING 2
473 static inline void pci_dev_assign_added(struct pci_dev *dev, bool added)
475 assign_bit(PCI_DEV_ADDED, &dev->priv_flags, added);
478 static inline bool pci_dev_is_added(const struct pci_dev *dev)
480 return test_bit(PCI_DEV_ADDED, &dev->priv_flags);
483 #ifdef CONFIG_PCIEAER
484 #include <linux/aer.h>
486 #define AER_MAX_MULTI_ERR_DEVICES 5 /* Not likely to have more */
488 struct aer_err_info {
489 struct pci_dev *dev[AER_MAX_MULTI_ERR_DEVICES];
494 unsigned int severity:2; /* 0:NONFATAL | 1:FATAL | 2:COR */
495 unsigned int __pad1:5;
496 unsigned int multi_error_valid:1;
498 unsigned int first_error:5;
499 unsigned int __pad2:2;
500 unsigned int tlp_header_valid:1;
502 unsigned int status; /* COR/UNCOR Error Status */
503 unsigned int mask; /* COR/UNCOR Error Mask */
504 struct pcie_tlp_log tlp; /* TLP Header */
507 int aer_get_device_error_info(struct pci_dev *dev, struct aer_err_info *info);
508 void aer_print_error(struct pci_dev *dev, struct aer_err_info *info);
509 #endif /* CONFIG_PCIEAER */
511 #ifdef CONFIG_PCIEPORTBUS
512 /* Cached RCEC Endpoint Association */
520 #ifdef CONFIG_PCIE_DPC
521 void pci_save_dpc_state(struct pci_dev *dev);
522 void pci_restore_dpc_state(struct pci_dev *dev);
523 void pci_dpc_init(struct pci_dev *pdev);
524 void dpc_process_error(struct pci_dev *pdev);
525 pci_ers_result_t dpc_reset_link(struct pci_dev *pdev);
526 bool pci_dpc_recovered(struct pci_dev *pdev);
528 static inline void pci_save_dpc_state(struct pci_dev *dev) { }
529 static inline void pci_restore_dpc_state(struct pci_dev *dev) { }
530 static inline void pci_dpc_init(struct pci_dev *pdev) { }
531 static inline bool pci_dpc_recovered(struct pci_dev *pdev) { return false; }
534 #ifdef CONFIG_PCIEPORTBUS
535 void pci_rcec_init(struct pci_dev *dev);
536 void pci_rcec_exit(struct pci_dev *dev);
537 void pcie_link_rcec(struct pci_dev *rcec);
538 void pcie_walk_rcec(struct pci_dev *rcec,
539 int (*cb)(struct pci_dev *, void *),
542 static inline void pci_rcec_init(struct pci_dev *dev) { }
543 static inline void pci_rcec_exit(struct pci_dev *dev) { }
544 static inline void pcie_link_rcec(struct pci_dev *rcec) { }
545 static inline void pcie_walk_rcec(struct pci_dev *rcec,
546 int (*cb)(struct pci_dev *, void *),
550 #ifdef CONFIG_PCI_ATS
551 /* Address Translation Service */
552 void pci_ats_init(struct pci_dev *dev);
553 void pci_restore_ats_state(struct pci_dev *dev);
555 static inline void pci_ats_init(struct pci_dev *d) { }
556 static inline void pci_restore_ats_state(struct pci_dev *dev) { }
557 #endif /* CONFIG_PCI_ATS */
559 #ifdef CONFIG_PCI_PRI
560 void pci_pri_init(struct pci_dev *dev);
561 void pci_restore_pri_state(struct pci_dev *pdev);
563 static inline void pci_pri_init(struct pci_dev *dev) { }
564 static inline void pci_restore_pri_state(struct pci_dev *pdev) { }
567 #ifdef CONFIG_PCI_PASID
568 void pci_pasid_init(struct pci_dev *dev);
569 void pci_restore_pasid_state(struct pci_dev *pdev);
571 static inline void pci_pasid_init(struct pci_dev *dev) { }
572 static inline void pci_restore_pasid_state(struct pci_dev *pdev) { }
575 #ifdef CONFIG_PCI_IOV
576 int pci_iov_init(struct pci_dev *dev);
577 void pci_iov_release(struct pci_dev *dev);
578 void pci_iov_remove(struct pci_dev *dev);
579 void pci_iov_update_resource(struct pci_dev *dev, int resno);
580 resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno);
581 void pci_restore_iov_state(struct pci_dev *dev);
582 int pci_iov_bus_range(struct pci_bus *bus);
583 extern const struct attribute_group sriov_pf_dev_attr_group;
584 extern const struct attribute_group sriov_vf_dev_attr_group;
586 static inline int pci_iov_init(struct pci_dev *dev)
590 static inline void pci_iov_release(struct pci_dev *dev) { }
591 static inline void pci_iov_remove(struct pci_dev *dev) { }
592 static inline void pci_restore_iov_state(struct pci_dev *dev) { }
593 static inline int pci_iov_bus_range(struct pci_bus *bus)
598 #endif /* CONFIG_PCI_IOV */
600 #ifdef CONFIG_PCIE_PTM
601 void pci_ptm_init(struct pci_dev *dev);
602 void pci_save_ptm_state(struct pci_dev *dev);
603 void pci_restore_ptm_state(struct pci_dev *dev);
604 void pci_suspend_ptm(struct pci_dev *dev);
605 void pci_resume_ptm(struct pci_dev *dev);
607 static inline void pci_ptm_init(struct pci_dev *dev) { }
608 static inline void pci_save_ptm_state(struct pci_dev *dev) { }
609 static inline void pci_restore_ptm_state(struct pci_dev *dev) { }
610 static inline void pci_suspend_ptm(struct pci_dev *dev) { }
611 static inline void pci_resume_ptm(struct pci_dev *dev) { }
614 unsigned long pci_cardbus_resource_alignment(struct resource *);
616 static inline resource_size_t pci_resource_alignment(struct pci_dev *dev,
617 struct resource *res)
619 #ifdef CONFIG_PCI_IOV
620 int resno = res - dev->resource;
622 if (resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END)
623 return pci_sriov_resource_alignment(dev, resno);
625 if (dev->class >> 8 == PCI_CLASS_BRIDGE_CARDBUS)
626 return pci_cardbus_resource_alignment(res);
627 return resource_alignment(res);
630 void pci_acs_init(struct pci_dev *dev);
631 #ifdef CONFIG_PCI_QUIRKS
632 int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags);
633 int pci_dev_specific_enable_acs(struct pci_dev *dev);
634 int pci_dev_specific_disable_acs_redir(struct pci_dev *dev);
635 int pcie_failed_link_retrain(struct pci_dev *dev);
637 static inline int pci_dev_specific_acs_enabled(struct pci_dev *dev,
642 static inline int pci_dev_specific_enable_acs(struct pci_dev *dev)
646 static inline int pci_dev_specific_disable_acs_redir(struct pci_dev *dev)
650 static inline int pcie_failed_link_retrain(struct pci_dev *dev)
656 /* PCI error reporting and recovery */
657 pci_ers_result_t pcie_do_recovery(struct pci_dev *dev,
658 pci_channel_state_t state,
659 pci_ers_result_t (*reset_subordinates)(struct pci_dev *pdev));
661 bool pcie_wait_for_link(struct pci_dev *pdev, bool active);
662 int pcie_retrain_link(struct pci_dev *pdev, bool use_lt);
664 /* ASPM-related functionality we need even without CONFIG_PCIEASPM */
665 void pci_save_ltr_state(struct pci_dev *dev);
666 void pci_restore_ltr_state(struct pci_dev *dev);
667 void pci_configure_aspm_l1ss(struct pci_dev *dev);
668 void pci_save_aspm_l1ss_state(struct pci_dev *dev);
669 void pci_restore_aspm_l1ss_state(struct pci_dev *dev);
671 #ifdef CONFIG_PCIEASPM
672 void pcie_aspm_init_link_state(struct pci_dev *pdev);
673 void pcie_aspm_exit_link_state(struct pci_dev *pdev);
674 void pcie_aspm_pm_state_change(struct pci_dev *pdev, bool locked);
675 void pcie_aspm_powersave_config_link(struct pci_dev *pdev);
676 void pci_configure_ltr(struct pci_dev *pdev);
677 void pci_bridge_reconfigure_ltr(struct pci_dev *pdev);
679 static inline void pcie_aspm_init_link_state(struct pci_dev *pdev) { }
680 static inline void pcie_aspm_exit_link_state(struct pci_dev *pdev) { }
681 static inline void pcie_aspm_pm_state_change(struct pci_dev *pdev, bool locked) { }
682 static inline void pcie_aspm_powersave_config_link(struct pci_dev *pdev) { }
683 static inline void pci_configure_ltr(struct pci_dev *pdev) { }
684 static inline void pci_bridge_reconfigure_ltr(struct pci_dev *pdev) { }
687 #ifdef CONFIG_PCIE_ECRC
688 void pcie_set_ecrc_checking(struct pci_dev *dev);
689 void pcie_ecrc_get_policy(char *str);
691 static inline void pcie_set_ecrc_checking(struct pci_dev *dev) { }
692 static inline void pcie_ecrc_get_policy(char *str) { }
695 struct pci_dev_reset_methods {
698 int (*reset)(struct pci_dev *dev, bool probe);
701 struct pci_reset_fn_method {
702 int (*reset_fn)(struct pci_dev *pdev, bool probe);
706 #ifdef CONFIG_PCI_QUIRKS
707 int pci_dev_specific_reset(struct pci_dev *dev, bool probe);
709 static inline int pci_dev_specific_reset(struct pci_dev *dev, bool probe)
715 #if defined(CONFIG_PCI_QUIRKS) && defined(CONFIG_ARM64)
716 int acpi_get_rc_resources(struct device *dev, const char *hid, u16 segment,
717 struct resource *res);
719 static inline int acpi_get_rc_resources(struct device *dev, const char *hid,
720 u16 segment, struct resource *res)
726 int pci_rebar_get_current_size(struct pci_dev *pdev, int bar);
727 int pci_rebar_set_size(struct pci_dev *pdev, int bar, int size);
728 static inline u64 pci_rebar_size_to_bytes(int size)
730 return 1ULL << (size + 20);
736 int of_pci_parse_bus_range(struct device_node *node, struct resource *res);
737 int of_get_pci_domain_nr(struct device_node *node);
738 int of_pci_get_max_link_speed(struct device_node *node);
739 u32 of_pci_get_slot_power_limit(struct device_node *node,
740 u8 *slot_power_limit_value,
741 u8 *slot_power_limit_scale);
742 bool of_pci_preserve_config(struct device_node *node);
743 int pci_set_of_node(struct pci_dev *dev);
744 void pci_release_of_node(struct pci_dev *dev);
745 void pci_set_bus_of_node(struct pci_bus *bus);
746 void pci_release_bus_of_node(struct pci_bus *bus);
748 int devm_of_pci_bridge_init(struct device *dev, struct pci_host_bridge *bridge);
752 of_pci_parse_bus_range(struct device_node *node, struct resource *res)
758 of_get_pci_domain_nr(struct device_node *node)
764 of_pci_get_max_link_speed(struct device_node *node)
770 of_pci_get_slot_power_limit(struct device_node *node,
771 u8 *slot_power_limit_value,
772 u8 *slot_power_limit_scale)
774 if (slot_power_limit_value)
775 *slot_power_limit_value = 0;
776 if (slot_power_limit_scale)
777 *slot_power_limit_scale = 0;
781 static inline bool of_pci_preserve_config(struct device_node *node)
786 static inline int pci_set_of_node(struct pci_dev *dev) { return 0; }
787 static inline void pci_release_of_node(struct pci_dev *dev) { }
788 static inline void pci_set_bus_of_node(struct pci_bus *bus) { }
789 static inline void pci_release_bus_of_node(struct pci_bus *bus) { }
791 static inline int devm_of_pci_bridge_init(struct device *dev, struct pci_host_bridge *bridge)
796 #endif /* CONFIG_OF */
800 #ifdef CONFIG_PCI_DYNAMIC_OF_NODES
801 void of_pci_make_dev_node(struct pci_dev *pdev);
802 void of_pci_remove_node(struct pci_dev *pdev);
803 int of_pci_add_properties(struct pci_dev *pdev, struct of_changeset *ocs,
804 struct device_node *np);
806 static inline void of_pci_make_dev_node(struct pci_dev *pdev) { }
807 static inline void of_pci_remove_node(struct pci_dev *pdev) { }
810 #ifdef CONFIG_PCIEAER
811 void pci_no_aer(void);
812 void pci_aer_init(struct pci_dev *dev);
813 void pci_aer_exit(struct pci_dev *dev);
814 extern const struct attribute_group aer_stats_attr_group;
815 void pci_aer_clear_fatal_status(struct pci_dev *dev);
816 int pci_aer_clear_status(struct pci_dev *dev);
817 int pci_aer_raw_clear_status(struct pci_dev *dev);
818 void pci_save_aer_state(struct pci_dev *dev);
819 void pci_restore_aer_state(struct pci_dev *dev);
821 static inline void pci_no_aer(void) { }
822 static inline void pci_aer_init(struct pci_dev *d) { }
823 static inline void pci_aer_exit(struct pci_dev *d) { }
824 static inline void pci_aer_clear_fatal_status(struct pci_dev *dev) { }
825 static inline int pci_aer_clear_status(struct pci_dev *dev) { return -EINVAL; }
826 static inline int pci_aer_raw_clear_status(struct pci_dev *dev) { return -EINVAL; }
827 static inline void pci_save_aer_state(struct pci_dev *dev) { }
828 static inline void pci_restore_aer_state(struct pci_dev *dev) { }
832 bool pci_acpi_preserve_config(struct pci_host_bridge *bridge);
833 int pci_acpi_program_hp_params(struct pci_dev *dev);
834 extern const struct attribute_group pci_dev_acpi_attr_group;
835 void pci_set_acpi_fwnode(struct pci_dev *dev);
836 int pci_dev_acpi_reset(struct pci_dev *dev, bool probe);
837 bool acpi_pci_power_manageable(struct pci_dev *dev);
838 bool acpi_pci_bridge_d3(struct pci_dev *dev);
839 int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state);
840 pci_power_t acpi_pci_get_power_state(struct pci_dev *dev);
841 void acpi_pci_refresh_power_state(struct pci_dev *dev);
842 int acpi_pci_wakeup(struct pci_dev *dev, bool enable);
843 bool acpi_pci_need_resume(struct pci_dev *dev);
844 pci_power_t acpi_pci_choose_state(struct pci_dev *pdev);
846 static inline bool pci_acpi_preserve_config(struct pci_host_bridge *bridge)
850 static inline int pci_dev_acpi_reset(struct pci_dev *dev, bool probe)
854 static inline void pci_set_acpi_fwnode(struct pci_dev *dev) { }
855 static inline int pci_acpi_program_hp_params(struct pci_dev *dev)
859 static inline bool acpi_pci_power_manageable(struct pci_dev *dev)
863 static inline bool acpi_pci_bridge_d3(struct pci_dev *dev)
867 static inline int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
871 static inline pci_power_t acpi_pci_get_power_state(struct pci_dev *dev)
875 static inline void acpi_pci_refresh_power_state(struct pci_dev *dev) { }
876 static inline int acpi_pci_wakeup(struct pci_dev *dev, bool enable)
880 static inline bool acpi_pci_need_resume(struct pci_dev *dev)
884 static inline pci_power_t acpi_pci_choose_state(struct pci_dev *pdev)
886 return PCI_POWER_ERROR;
890 #ifdef CONFIG_PCIEASPM
891 extern const struct attribute_group aspm_ctrl_attr_group;
894 extern const struct attribute_group pci_dev_reset_method_attr_group;
896 #ifdef CONFIG_X86_INTEL_MID
897 bool pci_use_mid_pm(void);
898 int mid_pci_set_power_state(struct pci_dev *pdev, pci_power_t state);
899 pci_power_t mid_pci_get_power_state(struct pci_dev *pdev);
901 static inline bool pci_use_mid_pm(void)
905 static inline int mid_pci_set_power_state(struct pci_dev *pdev, pci_power_t state)
909 static inline pci_power_t mid_pci_get_power_state(struct pci_dev *pdev)
915 int pcim_intx(struct pci_dev *dev, int enable);
916 int pcim_request_region_exclusive(struct pci_dev *pdev, int bar,
918 void pcim_release_region(struct pci_dev *pdev, int bar);
921 * Config Address for PCI Configuration Mechanism #1
923 * See PCI Local Bus Specification, Revision 3.0,
924 * Section 3.2.2.3.2, Figure 3-2, p. 50.
927 #define PCI_CONF1_BUS_SHIFT 16 /* Bus number */
928 #define PCI_CONF1_DEV_SHIFT 11 /* Device number */
929 #define PCI_CONF1_FUNC_SHIFT 8 /* Function number */
931 #define PCI_CONF1_BUS_MASK 0xff
932 #define PCI_CONF1_DEV_MASK 0x1f
933 #define PCI_CONF1_FUNC_MASK 0x7
934 #define PCI_CONF1_REG_MASK 0xfc /* Limit aligned offset to a maximum of 256B */
936 #define PCI_CONF1_ENABLE BIT(31)
937 #define PCI_CONF1_BUS(x) (((x) & PCI_CONF1_BUS_MASK) << PCI_CONF1_BUS_SHIFT)
938 #define PCI_CONF1_DEV(x) (((x) & PCI_CONF1_DEV_MASK) << PCI_CONF1_DEV_SHIFT)
939 #define PCI_CONF1_FUNC(x) (((x) & PCI_CONF1_FUNC_MASK) << PCI_CONF1_FUNC_SHIFT)
940 #define PCI_CONF1_REG(x) ((x) & PCI_CONF1_REG_MASK)
942 #define PCI_CONF1_ADDRESS(bus, dev, func, reg) \
943 (PCI_CONF1_ENABLE | \
944 PCI_CONF1_BUS(bus) | \
945 PCI_CONF1_DEV(dev) | \
946 PCI_CONF1_FUNC(func) | \
950 * Extension of PCI Config Address for accessing extended PCIe registers
952 * No standardized specification, but used on lot of non-ECAM-compliant ARM SoCs
953 * or on AMD Barcelona and new CPUs. Reserved bits [27:24] of PCI Config Address
954 * are used for specifying additional 4 high bits of PCI Express register.
957 #define PCI_CONF1_EXT_REG_SHIFT 16
958 #define PCI_CONF1_EXT_REG_MASK 0xf00
959 #define PCI_CONF1_EXT_REG(x) (((x) & PCI_CONF1_EXT_REG_MASK) << PCI_CONF1_EXT_REG_SHIFT)
961 #define PCI_CONF1_EXT_ADDRESS(bus, dev, func, reg) \
962 (PCI_CONF1_ADDRESS(bus, dev, func, reg) | \
963 PCI_CONF1_EXT_REG(reg))
965 #endif /* DRIVERS_PCI_H */