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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#define PCIE_LINK_RETRAIN_TIMEOUT_MS 1000
15
16/*
17 * Power stable to PERST# inactive.
18 *
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
21 * "T_PVPERL".
22 */
23#define PCIE_T_PVPERL_MS 100
24
25/*
26 * REFCLK stable before PERST# inactive.
27 *
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
30 * "T_PERST-CLK".
31 */
32#define PCIE_T_PERST_CLK_US 100
33
34/*
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.
38 */
39#define PCIE_T_RRS_READY_MS 100
40
41/*
42 * PCIe r6.0, sec 5.3.3.2.1 <PME Synchronization>
43 * Recommends 1ms to 10ms timeout to check L2 ready.
44 */
45#define PCIE_PME_TO_L2_TIMEOUT_US 10000
46
47/*
48 * PCIe r6.0, sec 6.6.1 <Conventional Reset>
49 *
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."
54 *
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."
59 */
60#define PCIE_RESET_CONFIG_DEVICE_WAIT_MS 100
61
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
69
70/* Power Management Messages; PCIe r6.0, sec 2.2.8.2 */
71#define PCIE_MSG_CODE_PME_TURN_OFF 0x19
72
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
82
83extern const unsigned char pcie_link_speed[];
84extern bool pci_early_dump;
85
86bool pcie_cap_has_lnkctl(const struct pci_dev *dev);
87bool pcie_cap_has_lnkctl2(const struct pci_dev *dev);
88bool pcie_cap_has_rtctl(const struct pci_dev *dev);
89
90/* Functions internal to the PCI core code */
91
92#ifdef CONFIG_DMI
93extern const struct attribute_group pci_dev_smbios_attr_group;
94#endif
95
96enum pci_mmap_api {
97 PCI_MMAP_SYSFS, /* mmap on /sys/bus/pci/devices/<BDF>/resource<N> */
98 PCI_MMAP_PROCFS /* mmap on /proc/bus/pci/<BDF> */
99};
100int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vmai,
101 enum pci_mmap_api mmap_api);
102
103bool pci_reset_supported(struct pci_dev *dev);
104void pci_init_reset_methods(struct pci_dev *dev);
105int pci_bridge_secondary_bus_reset(struct pci_dev *dev);
106int pci_bus_error_reset(struct pci_dev *dev);
107int __pci_reset_bus(struct pci_bus *bus);
108
109struct pci_cap_saved_data {
110 u16 cap_nr;
111 bool cap_extended;
112 unsigned int size;
113 u32 data[];
114};
115
116struct pci_cap_saved_state {
117 struct hlist_node next;
118 struct pci_cap_saved_data cap;
119};
120
121void pci_allocate_cap_save_buffers(struct pci_dev *dev);
122void pci_free_cap_save_buffers(struct pci_dev *dev);
123int pci_add_cap_save_buffer(struct pci_dev *dev, char cap, unsigned int size);
124int pci_add_ext_cap_save_buffer(struct pci_dev *dev,
125 u16 cap, unsigned int size);
126struct pci_cap_saved_state *pci_find_saved_cap(struct pci_dev *dev, char cap);
127struct pci_cap_saved_state *pci_find_saved_ext_cap(struct pci_dev *dev,
128 u16 cap);
129
130#define PCI_PM_D2_DELAY 200 /* usec; see PCIe r4.0, sec 5.9.1 */
131#define PCI_PM_D3HOT_WAIT 10 /* msec */
132#define PCI_PM_D3COLD_WAIT 100 /* msec */
133
134void pci_update_current_state(struct pci_dev *dev, pci_power_t state);
135void pci_refresh_power_state(struct pci_dev *dev);
136int pci_power_up(struct pci_dev *dev);
137void pci_disable_enabled_device(struct pci_dev *dev);
138int pci_finish_runtime_suspend(struct pci_dev *dev);
139void pcie_clear_device_status(struct pci_dev *dev);
140void pcie_clear_root_pme_status(struct pci_dev *dev);
141bool pci_check_pme_status(struct pci_dev *dev);
142void pci_pme_wakeup_bus(struct pci_bus *bus);
143void pci_pme_restore(struct pci_dev *dev);
144bool pci_dev_need_resume(struct pci_dev *dev);
145void pci_dev_adjust_pme(struct pci_dev *dev);
146void pci_dev_complete_resume(struct pci_dev *pci_dev);
147void pci_config_pm_runtime_get(struct pci_dev *dev);
148void pci_config_pm_runtime_put(struct pci_dev *dev);
149void pci_pm_init(struct pci_dev *dev);
150void pci_ea_init(struct pci_dev *dev);
151void pci_msi_init(struct pci_dev *dev);
152void pci_msix_init(struct pci_dev *dev);
153bool pci_bridge_d3_possible(struct pci_dev *dev);
154void pci_bridge_d3_update(struct pci_dev *dev);
155int pci_bridge_wait_for_secondary_bus(struct pci_dev *dev, char *reset_type);
156
157static inline bool pci_bus_rrs_vendor_id(u32 l)
158{
159 return (l & 0xffff) == PCI_VENDOR_ID_PCI_SIG;
160}
161
162static inline void pci_wakeup_event(struct pci_dev *dev)
163{
164 /* Wait 100 ms before the system can be put into a sleep state. */
165 pm_wakeup_event(&dev->dev, 100);
166}
167
168static inline bool pci_has_subordinate(struct pci_dev *pci_dev)
169{
170 return !!(pci_dev->subordinate);
171}
172
173static inline bool pci_power_manageable(struct pci_dev *pci_dev)
174{
175 /*
176 * Currently we allow normal PCI devices and PCI bridges transition
177 * into D3 if their bridge_d3 is set.
178 */
179 return !pci_has_subordinate(pci_dev) || pci_dev->bridge_d3;
180}
181
182static inline bool pcie_downstream_port(const struct pci_dev *dev)
183{
184 int type = pci_pcie_type(dev);
185
186 return type == PCI_EXP_TYPE_ROOT_PORT ||
187 type == PCI_EXP_TYPE_DOWNSTREAM ||
188 type == PCI_EXP_TYPE_PCIE_BRIDGE;
189}
190
191void pci_vpd_init(struct pci_dev *dev);
192extern const struct attribute_group pci_dev_vpd_attr_group;
193
194/* PCI Virtual Channel */
195int pci_save_vc_state(struct pci_dev *dev);
196void pci_restore_vc_state(struct pci_dev *dev);
197void pci_allocate_vc_save_buffers(struct pci_dev *dev);
198
199/* PCI /proc functions */
200#ifdef CONFIG_PROC_FS
201int pci_proc_attach_device(struct pci_dev *dev);
202int pci_proc_detach_device(struct pci_dev *dev);
203int pci_proc_detach_bus(struct pci_bus *bus);
204#else
205static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; }
206static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; }
207static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
208#endif
209
210/* Functions for PCI Hotplug drivers to use */
211int pci_hp_add_bridge(struct pci_dev *dev);
212
213#if defined(CONFIG_SYSFS) && defined(HAVE_PCI_LEGACY)
214void pci_create_legacy_files(struct pci_bus *bus);
215void pci_remove_legacy_files(struct pci_bus *bus);
216#else
217static inline void pci_create_legacy_files(struct pci_bus *bus) { }
218static inline void pci_remove_legacy_files(struct pci_bus *bus) { }
219#endif
220
221/* Lock for read/write access to pci device and bus lists */
222extern struct rw_semaphore pci_bus_sem;
223extern struct mutex pci_slot_mutex;
224
225extern raw_spinlock_t pci_lock;
226
227extern unsigned int pci_pm_d3hot_delay;
228
229#ifdef CONFIG_PCI_MSI
230void pci_no_msi(void);
231#else
232static inline void pci_no_msi(void) { }
233#endif
234
235void pci_realloc_get_opt(char *);
236
237static inline int pci_no_d1d2(struct pci_dev *dev)
238{
239 unsigned int parent_dstates = 0;
240
241 if (dev->bus->self)
242 parent_dstates = dev->bus->self->no_d1d2;
243 return (dev->no_d1d2 || parent_dstates);
244
245}
246
247#ifdef CONFIG_SYSFS
248int pci_create_sysfs_dev_files(struct pci_dev *pdev);
249void pci_remove_sysfs_dev_files(struct pci_dev *pdev);
250extern const struct attribute_group *pci_dev_groups[];
251extern const struct attribute_group *pci_dev_attr_groups[];
252extern const struct attribute_group *pcibus_groups[];
253extern const struct attribute_group *pci_bus_groups[];
254#else
255static inline int pci_create_sysfs_dev_files(struct pci_dev *pdev) { return 0; }
256static inline void pci_remove_sysfs_dev_files(struct pci_dev *pdev) { }
257#define pci_dev_groups NULL
258#define pci_dev_attr_groups NULL
259#define pcibus_groups NULL
260#define pci_bus_groups NULL
261#endif
262
263extern unsigned long pci_hotplug_io_size;
264extern unsigned long pci_hotplug_mmio_size;
265extern unsigned long pci_hotplug_mmio_pref_size;
266extern unsigned long pci_hotplug_bus_size;
267
268/**
269 * pci_match_one_device - Tell if a PCI device structure has a matching
270 * PCI device id structure
271 * @id: single PCI device id structure to match
272 * @dev: the PCI device structure to match against
273 *
274 * Returns the matching pci_device_id structure or %NULL if there is no match.
275 */
276static inline const struct pci_device_id *
277pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev)
278{
279 if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) &&
280 (id->device == PCI_ANY_ID || id->device == dev->device) &&
281 (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) &&
282 (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) &&
283 !((id->class ^ dev->class) & id->class_mask))
284 return id;
285 return NULL;
286}
287
288/* PCI slot sysfs helper code */
289#define to_pci_slot(s) container_of(s, struct pci_slot, kobj)
290
291extern struct kset *pci_slots_kset;
292
293struct pci_slot_attribute {
294 struct attribute attr;
295 ssize_t (*show)(struct pci_slot *, char *);
296 ssize_t (*store)(struct pci_slot *, const char *, size_t);
297};
298#define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)
299
300enum pci_bar_type {
301 pci_bar_unknown, /* Standard PCI BAR probe */
302 pci_bar_io, /* An I/O port BAR */
303 pci_bar_mem32, /* A 32-bit memory BAR */
304 pci_bar_mem64, /* A 64-bit memory BAR */
305};
306
307struct device *pci_get_host_bridge_device(struct pci_dev *dev);
308void pci_put_host_bridge_device(struct device *dev);
309
310int pci_configure_extended_tags(struct pci_dev *dev, void *ign);
311bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
312 int rrs_timeout);
313bool pci_bus_generic_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
314 int rrs_timeout);
315int pci_idt_bus_quirk(struct pci_bus *bus, int devfn, u32 *pl, int rrs_timeout);
316
317int pci_setup_device(struct pci_dev *dev);
318int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
319 struct resource *res, unsigned int reg);
320void pci_configure_ari(struct pci_dev *dev);
321void __pci_bus_size_bridges(struct pci_bus *bus,
322 struct list_head *realloc_head);
323void __pci_bus_assign_resources(const struct pci_bus *bus,
324 struct list_head *realloc_head,
325 struct list_head *fail_head);
326bool pci_bus_clip_resource(struct pci_dev *dev, int idx);
327void pci_walk_bus_locked(struct pci_bus *top,
328 int (*cb)(struct pci_dev *, void *),
329 void *userdata);
330
331const char *pci_resource_name(struct pci_dev *dev, unsigned int i);
332
333void pci_reassigndev_resource_alignment(struct pci_dev *dev);
334void pci_disable_bridge_window(struct pci_dev *dev);
335struct pci_bus *pci_bus_get(struct pci_bus *bus);
336void pci_bus_put(struct pci_bus *bus);
337
338#define PCIE_LNKCAP_SLS2SPEED(lnkcap) \
339({ \
340 ((lnkcap) == PCI_EXP_LNKCAP_SLS_64_0GB ? PCIE_SPEED_64_0GT : \
341 (lnkcap) == PCI_EXP_LNKCAP_SLS_32_0GB ? PCIE_SPEED_32_0GT : \
342 (lnkcap) == PCI_EXP_LNKCAP_SLS_16_0GB ? PCIE_SPEED_16_0GT : \
343 (lnkcap) == PCI_EXP_LNKCAP_SLS_8_0GB ? PCIE_SPEED_8_0GT : \
344 (lnkcap) == PCI_EXP_LNKCAP_SLS_5_0GB ? PCIE_SPEED_5_0GT : \
345 (lnkcap) == PCI_EXP_LNKCAP_SLS_2_5GB ? PCIE_SPEED_2_5GT : \
346 PCI_SPEED_UNKNOWN); \
347})
348
349/* PCIe link information from Link Capabilities 2 */
350#define PCIE_LNKCAP2_SLS2SPEED(lnkcap2) \
351 ((lnkcap2) & PCI_EXP_LNKCAP2_SLS_64_0GB ? PCIE_SPEED_64_0GT : \
352 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_32_0GB ? PCIE_SPEED_32_0GT : \
353 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_16_0GB ? PCIE_SPEED_16_0GT : \
354 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_8_0GB ? PCIE_SPEED_8_0GT : \
355 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_5_0GB ? PCIE_SPEED_5_0GT : \
356 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_2_5GB ? PCIE_SPEED_2_5GT : \
357 PCI_SPEED_UNKNOWN)
358
359#define PCIE_LNKCTL2_TLS2SPEED(lnkctl2) \
360 ((lnkctl2) == PCI_EXP_LNKCTL2_TLS_64_0GT ? PCIE_SPEED_64_0GT : \
361 (lnkctl2) == PCI_EXP_LNKCTL2_TLS_32_0GT ? PCIE_SPEED_32_0GT : \
362 (lnkctl2) == PCI_EXP_LNKCTL2_TLS_16_0GT ? PCIE_SPEED_16_0GT : \
363 (lnkctl2) == PCI_EXP_LNKCTL2_TLS_8_0GT ? PCIE_SPEED_8_0GT : \
364 (lnkctl2) == PCI_EXP_LNKCTL2_TLS_5_0GT ? PCIE_SPEED_5_0GT : \
365 (lnkctl2) == PCI_EXP_LNKCTL2_TLS_2_5GT ? PCIE_SPEED_2_5GT : \
366 PCI_SPEED_UNKNOWN)
367
368/* PCIe speed to Mb/s reduced by encoding overhead */
369#define PCIE_SPEED2MBS_ENC(speed) \
370 ((speed) == PCIE_SPEED_64_0GT ? 64000*1/1 : \
371 (speed) == PCIE_SPEED_32_0GT ? 32000*128/130 : \
372 (speed) == PCIE_SPEED_16_0GT ? 16000*128/130 : \
373 (speed) == PCIE_SPEED_8_0GT ? 8000*128/130 : \
374 (speed) == PCIE_SPEED_5_0GT ? 5000*8/10 : \
375 (speed) == PCIE_SPEED_2_5GT ? 2500*8/10 : \
376 0)
377
378static inline int pcie_dev_speed_mbps(enum pci_bus_speed speed)
379{
380 switch (speed) {
381 case PCIE_SPEED_2_5GT:
382 return 2500;
383 case PCIE_SPEED_5_0GT:
384 return 5000;
385 case PCIE_SPEED_8_0GT:
386 return 8000;
387 case PCIE_SPEED_16_0GT:
388 return 16000;
389 case PCIE_SPEED_32_0GT:
390 return 32000;
391 case PCIE_SPEED_64_0GT:
392 return 64000;
393 default:
394 break;
395 }
396
397 return -EINVAL;
398}
399
400u8 pcie_get_supported_speeds(struct pci_dev *dev);
401const char *pci_speed_string(enum pci_bus_speed speed);
402void __pcie_print_link_status(struct pci_dev *dev, bool verbose);
403void pcie_report_downtraining(struct pci_dev *dev);
404
405static inline void __pcie_update_link_speed(struct pci_bus *bus, u16 linksta)
406{
407 bus->cur_bus_speed = pcie_link_speed[linksta & PCI_EXP_LNKSTA_CLS];
408}
409void pcie_update_link_speed(struct pci_bus *bus);
410
411/* Single Root I/O Virtualization */
412struct pci_sriov {
413 int pos; /* Capability position */
414 int nres; /* Number of resources */
415 u32 cap; /* SR-IOV Capabilities */
416 u16 ctrl; /* SR-IOV Control */
417 u16 total_VFs; /* Total VFs associated with the PF */
418 u16 initial_VFs; /* Initial VFs associated with the PF */
419 u16 num_VFs; /* Number of VFs available */
420 u16 offset; /* First VF Routing ID offset */
421 u16 stride; /* Following VF stride */
422 u16 vf_device; /* VF device ID */
423 u32 pgsz; /* Page size for BAR alignment */
424 u8 link; /* Function Dependency Link */
425 u8 max_VF_buses; /* Max buses consumed by VFs */
426 u16 driver_max_VFs; /* Max num VFs driver supports */
427 struct pci_dev *dev; /* Lowest numbered PF */
428 struct pci_dev *self; /* This PF */
429 u32 class; /* VF device */
430 u8 hdr_type; /* VF header type */
431 u16 subsystem_vendor; /* VF subsystem vendor */
432 u16 subsystem_device; /* VF subsystem device */
433 resource_size_t barsz[PCI_SRIOV_NUM_BARS]; /* VF BAR size */
434 bool drivers_autoprobe; /* Auto probing of VFs by driver */
435};
436
437#ifdef CONFIG_PCI_DOE
438void pci_doe_init(struct pci_dev *pdev);
439void pci_doe_destroy(struct pci_dev *pdev);
440void pci_doe_disconnected(struct pci_dev *pdev);
441#else
442static inline void pci_doe_init(struct pci_dev *pdev) { }
443static inline void pci_doe_destroy(struct pci_dev *pdev) { }
444static inline void pci_doe_disconnected(struct pci_dev *pdev) { }
445#endif
446
447#ifdef CONFIG_PCI_NPEM
448void pci_npem_create(struct pci_dev *dev);
449void pci_npem_remove(struct pci_dev *dev);
450#else
451static inline void pci_npem_create(struct pci_dev *dev) { }
452static inline void pci_npem_remove(struct pci_dev *dev) { }
453#endif
454
455/**
456 * pci_dev_set_io_state - Set the new error state if possible.
457 *
458 * @dev: PCI device to set new error_state
459 * @new: the state we want dev to be in
460 *
461 * If the device is experiencing perm_failure, it has to remain in that state.
462 * Any other transition is allowed.
463 *
464 * Returns true if state has been changed to the requested state.
465 */
466static inline bool pci_dev_set_io_state(struct pci_dev *dev,
467 pci_channel_state_t new)
468{
469 pci_channel_state_t old;
470
471 switch (new) {
472 case pci_channel_io_perm_failure:
473 xchg(&dev->error_state, pci_channel_io_perm_failure);
474 return true;
475 case pci_channel_io_frozen:
476 old = cmpxchg(&dev->error_state, pci_channel_io_normal,
477 pci_channel_io_frozen);
478 return old != pci_channel_io_perm_failure;
479 case pci_channel_io_normal:
480 old = cmpxchg(&dev->error_state, pci_channel_io_frozen,
481 pci_channel_io_normal);
482 return old != pci_channel_io_perm_failure;
483 default:
484 return false;
485 }
486}
487
488static inline int pci_dev_set_disconnected(struct pci_dev *dev, void *unused)
489{
490 pci_dev_set_io_state(dev, pci_channel_io_perm_failure);
491 pci_doe_disconnected(dev);
492
493 return 0;
494}
495
496/* pci_dev priv_flags */
497#define PCI_DEV_ADDED 0
498#define PCI_DPC_RECOVERED 1
499#define PCI_DPC_RECOVERING 2
500#define PCI_DEV_REMOVED 3
501
502static inline void pci_dev_assign_added(struct pci_dev *dev)
503{
504 smp_mb__before_atomic();
505 set_bit(PCI_DEV_ADDED, &dev->priv_flags);
506 smp_mb__after_atomic();
507}
508
509static inline bool pci_dev_test_and_clear_added(struct pci_dev *dev)
510{
511 return test_and_clear_bit(PCI_DEV_ADDED, &dev->priv_flags);
512}
513
514static inline bool pci_dev_is_added(const struct pci_dev *dev)
515{
516 return test_bit(PCI_DEV_ADDED, &dev->priv_flags);
517}
518
519static inline bool pci_dev_test_and_set_removed(struct pci_dev *dev)
520{
521 return test_and_set_bit(PCI_DEV_REMOVED, &dev->priv_flags);
522}
523
524#ifdef CONFIG_PCIEAER
525#include <linux/aer.h>
526
527#define AER_MAX_MULTI_ERR_DEVICES 5 /* Not likely to have more */
528
529struct aer_err_info {
530 struct pci_dev *dev[AER_MAX_MULTI_ERR_DEVICES];
531 int error_dev_num;
532
533 unsigned int id:16;
534
535 unsigned int severity:2; /* 0:NONFATAL | 1:FATAL | 2:COR */
536 unsigned int __pad1:5;
537 unsigned int multi_error_valid:1;
538
539 unsigned int first_error:5;
540 unsigned int __pad2:2;
541 unsigned int tlp_header_valid:1;
542
543 unsigned int status; /* COR/UNCOR Error Status */
544 unsigned int mask; /* COR/UNCOR Error Mask */
545 struct pcie_tlp_log tlp; /* TLP Header */
546};
547
548int aer_get_device_error_info(struct pci_dev *dev, struct aer_err_info *info);
549void aer_print_error(struct pci_dev *dev, struct aer_err_info *info);
550#endif /* CONFIG_PCIEAER */
551
552#ifdef CONFIG_PCIEPORTBUS
553/* Cached RCEC Endpoint Association */
554struct rcec_ea {
555 u8 nextbusn;
556 u8 lastbusn;
557 u32 bitmap;
558};
559#endif
560
561#ifdef CONFIG_PCIE_DPC
562void pci_save_dpc_state(struct pci_dev *dev);
563void pci_restore_dpc_state(struct pci_dev *dev);
564void pci_dpc_init(struct pci_dev *pdev);
565void dpc_process_error(struct pci_dev *pdev);
566pci_ers_result_t dpc_reset_link(struct pci_dev *pdev);
567bool pci_dpc_recovered(struct pci_dev *pdev);
568#else
569static inline void pci_save_dpc_state(struct pci_dev *dev) { }
570static inline void pci_restore_dpc_state(struct pci_dev *dev) { }
571static inline void pci_dpc_init(struct pci_dev *pdev) { }
572static inline bool pci_dpc_recovered(struct pci_dev *pdev) { return false; }
573#endif
574
575#ifdef CONFIG_PCIEPORTBUS
576void pci_rcec_init(struct pci_dev *dev);
577void pci_rcec_exit(struct pci_dev *dev);
578void pcie_link_rcec(struct pci_dev *rcec);
579void pcie_walk_rcec(struct pci_dev *rcec,
580 int (*cb)(struct pci_dev *, void *),
581 void *userdata);
582#else
583static inline void pci_rcec_init(struct pci_dev *dev) { }
584static inline void pci_rcec_exit(struct pci_dev *dev) { }
585static inline void pcie_link_rcec(struct pci_dev *rcec) { }
586static inline void pcie_walk_rcec(struct pci_dev *rcec,
587 int (*cb)(struct pci_dev *, void *),
588 void *userdata) { }
589#endif
590
591#ifdef CONFIG_PCI_ATS
592/* Address Translation Service */
593void pci_ats_init(struct pci_dev *dev);
594void pci_restore_ats_state(struct pci_dev *dev);
595#else
596static inline void pci_ats_init(struct pci_dev *d) { }
597static inline void pci_restore_ats_state(struct pci_dev *dev) { }
598#endif /* CONFIG_PCI_ATS */
599
600#ifdef CONFIG_PCI_PRI
601void pci_pri_init(struct pci_dev *dev);
602void pci_restore_pri_state(struct pci_dev *pdev);
603#else
604static inline void pci_pri_init(struct pci_dev *dev) { }
605static inline void pci_restore_pri_state(struct pci_dev *pdev) { }
606#endif
607
608#ifdef CONFIG_PCI_PASID
609void pci_pasid_init(struct pci_dev *dev);
610void pci_restore_pasid_state(struct pci_dev *pdev);
611#else
612static inline void pci_pasid_init(struct pci_dev *dev) { }
613static inline void pci_restore_pasid_state(struct pci_dev *pdev) { }
614#endif
615
616#ifdef CONFIG_PCI_IOV
617int pci_iov_init(struct pci_dev *dev);
618void pci_iov_release(struct pci_dev *dev);
619void pci_iov_remove(struct pci_dev *dev);
620void pci_iov_update_resource(struct pci_dev *dev, int resno);
621resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno);
622void pci_restore_iov_state(struct pci_dev *dev);
623int pci_iov_bus_range(struct pci_bus *bus);
624extern const struct attribute_group sriov_pf_dev_attr_group;
625extern const struct attribute_group sriov_vf_dev_attr_group;
626#else
627static inline int pci_iov_init(struct pci_dev *dev)
628{
629 return -ENODEV;
630}
631static inline void pci_iov_release(struct pci_dev *dev) { }
632static inline void pci_iov_remove(struct pci_dev *dev) { }
633static inline void pci_restore_iov_state(struct pci_dev *dev) { }
634static inline int pci_iov_bus_range(struct pci_bus *bus)
635{
636 return 0;
637}
638
639#endif /* CONFIG_PCI_IOV */
640
641#ifdef CONFIG_PCIE_TPH
642void pci_restore_tph_state(struct pci_dev *dev);
643void pci_save_tph_state(struct pci_dev *dev);
644void pci_no_tph(void);
645void pci_tph_init(struct pci_dev *dev);
646#else
647static inline void pci_restore_tph_state(struct pci_dev *dev) { }
648static inline void pci_save_tph_state(struct pci_dev *dev) { }
649static inline void pci_no_tph(void) { }
650static inline void pci_tph_init(struct pci_dev *dev) { }
651#endif
652
653#ifdef CONFIG_PCIE_PTM
654void pci_ptm_init(struct pci_dev *dev);
655void pci_save_ptm_state(struct pci_dev *dev);
656void pci_restore_ptm_state(struct pci_dev *dev);
657void pci_suspend_ptm(struct pci_dev *dev);
658void pci_resume_ptm(struct pci_dev *dev);
659#else
660static inline void pci_ptm_init(struct pci_dev *dev) { }
661static inline void pci_save_ptm_state(struct pci_dev *dev) { }
662static inline void pci_restore_ptm_state(struct pci_dev *dev) { }
663static inline void pci_suspend_ptm(struct pci_dev *dev) { }
664static inline void pci_resume_ptm(struct pci_dev *dev) { }
665#endif
666
667unsigned long pci_cardbus_resource_alignment(struct resource *);
668
669static inline resource_size_t pci_resource_alignment(struct pci_dev *dev,
670 struct resource *res)
671{
672#ifdef CONFIG_PCI_IOV
673 int resno = res - dev->resource;
674
675 if (resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END)
676 return pci_sriov_resource_alignment(dev, resno);
677#endif
678 if (dev->class >> 8 == PCI_CLASS_BRIDGE_CARDBUS)
679 return pci_cardbus_resource_alignment(res);
680 return resource_alignment(res);
681}
682
683void pci_acs_init(struct pci_dev *dev);
684#ifdef CONFIG_PCI_QUIRKS
685int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags);
686int pci_dev_specific_enable_acs(struct pci_dev *dev);
687int pci_dev_specific_disable_acs_redir(struct pci_dev *dev);
688int pcie_failed_link_retrain(struct pci_dev *dev);
689#else
690static inline int pci_dev_specific_acs_enabled(struct pci_dev *dev,
691 u16 acs_flags)
692{
693 return -ENOTTY;
694}
695static inline int pci_dev_specific_enable_acs(struct pci_dev *dev)
696{
697 return -ENOTTY;
698}
699static inline int pci_dev_specific_disable_acs_redir(struct pci_dev *dev)
700{
701 return -ENOTTY;
702}
703static inline int pcie_failed_link_retrain(struct pci_dev *dev)
704{
705 return -ENOTTY;
706}
707#endif
708
709/* PCI error reporting and recovery */
710pci_ers_result_t pcie_do_recovery(struct pci_dev *dev,
711 pci_channel_state_t state,
712 pci_ers_result_t (*reset_subordinates)(struct pci_dev *pdev));
713
714bool pcie_wait_for_link(struct pci_dev *pdev, bool active);
715int pcie_retrain_link(struct pci_dev *pdev, bool use_lt);
716
717/* ASPM-related functionality we need even without CONFIG_PCIEASPM */
718void pci_save_ltr_state(struct pci_dev *dev);
719void pci_restore_ltr_state(struct pci_dev *dev);
720void pci_configure_aspm_l1ss(struct pci_dev *dev);
721void pci_save_aspm_l1ss_state(struct pci_dev *dev);
722void pci_restore_aspm_l1ss_state(struct pci_dev *dev);
723
724#ifdef CONFIG_PCIEASPM
725void pcie_aspm_init_link_state(struct pci_dev *pdev);
726void pcie_aspm_exit_link_state(struct pci_dev *pdev);
727void pcie_aspm_pm_state_change(struct pci_dev *pdev, bool locked);
728void pcie_aspm_powersave_config_link(struct pci_dev *pdev);
729void pci_configure_ltr(struct pci_dev *pdev);
730void pci_bridge_reconfigure_ltr(struct pci_dev *pdev);
731#else
732static inline void pcie_aspm_init_link_state(struct pci_dev *pdev) { }
733static inline void pcie_aspm_exit_link_state(struct pci_dev *pdev) { }
734static inline void pcie_aspm_pm_state_change(struct pci_dev *pdev, bool locked) { }
735static inline void pcie_aspm_powersave_config_link(struct pci_dev *pdev) { }
736static inline void pci_configure_ltr(struct pci_dev *pdev) { }
737static inline void pci_bridge_reconfigure_ltr(struct pci_dev *pdev) { }
738#endif
739
740#ifdef CONFIG_PCIE_ECRC
741void pcie_set_ecrc_checking(struct pci_dev *dev);
742void pcie_ecrc_get_policy(char *str);
743#else
744static inline void pcie_set_ecrc_checking(struct pci_dev *dev) { }
745static inline void pcie_ecrc_get_policy(char *str) { }
746#endif
747
748#ifdef CONFIG_PCIEPORTBUS
749void pcie_reset_lbms_count(struct pci_dev *port);
750int pcie_lbms_count(struct pci_dev *port, unsigned long *val);
751#else
752static inline void pcie_reset_lbms_count(struct pci_dev *port) {}
753static inline int pcie_lbms_count(struct pci_dev *port, unsigned long *val)
754{
755 return -EOPNOTSUPP;
756}
757#endif
758
759struct pci_dev_reset_methods {
760 u16 vendor;
761 u16 device;
762 int (*reset)(struct pci_dev *dev, bool probe);
763};
764
765struct pci_reset_fn_method {
766 int (*reset_fn)(struct pci_dev *pdev, bool probe);
767 char *name;
768};
769
770#ifdef CONFIG_PCI_QUIRKS
771int pci_dev_specific_reset(struct pci_dev *dev, bool probe);
772#else
773static inline int pci_dev_specific_reset(struct pci_dev *dev, bool probe)
774{
775 return -ENOTTY;
776}
777#endif
778
779#if defined(CONFIG_PCI_QUIRKS) && defined(CONFIG_ARM64)
780int acpi_get_rc_resources(struct device *dev, const char *hid, u16 segment,
781 struct resource *res);
782#else
783static inline int acpi_get_rc_resources(struct device *dev, const char *hid,
784 u16 segment, struct resource *res)
785{
786 return -ENODEV;
787}
788#endif
789
790int pci_rebar_get_current_size(struct pci_dev *pdev, int bar);
791int pci_rebar_set_size(struct pci_dev *pdev, int bar, int size);
792static inline u64 pci_rebar_size_to_bytes(int size)
793{
794 return 1ULL << (size + 20);
795}
796
797struct device_node;
798
799#ifdef CONFIG_OF
800int of_pci_parse_bus_range(struct device_node *node, struct resource *res);
801int of_get_pci_domain_nr(struct device_node *node);
802int of_pci_get_max_link_speed(struct device_node *node);
803u32 of_pci_get_slot_power_limit(struct device_node *node,
804 u8 *slot_power_limit_value,
805 u8 *slot_power_limit_scale);
806bool of_pci_preserve_config(struct device_node *node);
807int pci_set_of_node(struct pci_dev *dev);
808void pci_release_of_node(struct pci_dev *dev);
809void pci_set_bus_of_node(struct pci_bus *bus);
810void pci_release_bus_of_node(struct pci_bus *bus);
811
812int devm_of_pci_bridge_init(struct device *dev, struct pci_host_bridge *bridge);
813bool of_pci_supply_present(struct device_node *np);
814
815#else
816static inline int
817of_pci_parse_bus_range(struct device_node *node, struct resource *res)
818{
819 return -EINVAL;
820}
821
822static inline int
823of_get_pci_domain_nr(struct device_node *node)
824{
825 return -1;
826}
827
828static inline int
829of_pci_get_max_link_speed(struct device_node *node)
830{
831 return -EINVAL;
832}
833
834static inline u32
835of_pci_get_slot_power_limit(struct device_node *node,
836 u8 *slot_power_limit_value,
837 u8 *slot_power_limit_scale)
838{
839 if (slot_power_limit_value)
840 *slot_power_limit_value = 0;
841 if (slot_power_limit_scale)
842 *slot_power_limit_scale = 0;
843 return 0;
844}
845
846static inline bool of_pci_preserve_config(struct device_node *node)
847{
848 return false;
849}
850
851static inline int pci_set_of_node(struct pci_dev *dev) { return 0; }
852static inline void pci_release_of_node(struct pci_dev *dev) { }
853static inline void pci_set_bus_of_node(struct pci_bus *bus) { }
854static inline void pci_release_bus_of_node(struct pci_bus *bus) { }
855
856static inline int devm_of_pci_bridge_init(struct device *dev, struct pci_host_bridge *bridge)
857{
858 return 0;
859}
860
861static inline bool of_pci_supply_present(struct device_node *np)
862{
863 return false;
864}
865#endif /* CONFIG_OF */
866
867struct of_changeset;
868
869#ifdef CONFIG_PCI_DYNAMIC_OF_NODES
870void of_pci_make_dev_node(struct pci_dev *pdev);
871void of_pci_remove_node(struct pci_dev *pdev);
872int of_pci_add_properties(struct pci_dev *pdev, struct of_changeset *ocs,
873 struct device_node *np);
874#else
875static inline void of_pci_make_dev_node(struct pci_dev *pdev) { }
876static inline void of_pci_remove_node(struct pci_dev *pdev) { }
877#endif
878
879#ifdef CONFIG_PCIEAER
880void pci_no_aer(void);
881void pci_aer_init(struct pci_dev *dev);
882void pci_aer_exit(struct pci_dev *dev);
883extern const struct attribute_group aer_stats_attr_group;
884void pci_aer_clear_fatal_status(struct pci_dev *dev);
885int pci_aer_clear_status(struct pci_dev *dev);
886int pci_aer_raw_clear_status(struct pci_dev *dev);
887void pci_save_aer_state(struct pci_dev *dev);
888void pci_restore_aer_state(struct pci_dev *dev);
889#else
890static inline void pci_no_aer(void) { }
891static inline void pci_aer_init(struct pci_dev *d) { }
892static inline void pci_aer_exit(struct pci_dev *d) { }
893static inline void pci_aer_clear_fatal_status(struct pci_dev *dev) { }
894static inline int pci_aer_clear_status(struct pci_dev *dev) { return -EINVAL; }
895static inline int pci_aer_raw_clear_status(struct pci_dev *dev) { return -EINVAL; }
896static inline void pci_save_aer_state(struct pci_dev *dev) { }
897static inline void pci_restore_aer_state(struct pci_dev *dev) { }
898#endif
899
900#ifdef CONFIG_ACPI
901bool pci_acpi_preserve_config(struct pci_host_bridge *bridge);
902int pci_acpi_program_hp_params(struct pci_dev *dev);
903extern const struct attribute_group pci_dev_acpi_attr_group;
904void pci_set_acpi_fwnode(struct pci_dev *dev);
905int pci_dev_acpi_reset(struct pci_dev *dev, bool probe);
906bool acpi_pci_power_manageable(struct pci_dev *dev);
907bool acpi_pci_bridge_d3(struct pci_dev *dev);
908int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state);
909pci_power_t acpi_pci_get_power_state(struct pci_dev *dev);
910void acpi_pci_refresh_power_state(struct pci_dev *dev);
911int acpi_pci_wakeup(struct pci_dev *dev, bool enable);
912bool acpi_pci_need_resume(struct pci_dev *dev);
913pci_power_t acpi_pci_choose_state(struct pci_dev *pdev);
914#else
915static inline bool pci_acpi_preserve_config(struct pci_host_bridge *bridge)
916{
917 return false;
918}
919static inline int pci_dev_acpi_reset(struct pci_dev *dev, bool probe)
920{
921 return -ENOTTY;
922}
923static inline void pci_set_acpi_fwnode(struct pci_dev *dev) { }
924static inline int pci_acpi_program_hp_params(struct pci_dev *dev)
925{
926 return -ENODEV;
927}
928static inline bool acpi_pci_power_manageable(struct pci_dev *dev)
929{
930 return false;
931}
932static inline bool acpi_pci_bridge_d3(struct pci_dev *dev)
933{
934 return false;
935}
936static inline int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
937{
938 return -ENODEV;
939}
940static inline pci_power_t acpi_pci_get_power_state(struct pci_dev *dev)
941{
942 return PCI_UNKNOWN;
943}
944static inline void acpi_pci_refresh_power_state(struct pci_dev *dev) { }
945static inline int acpi_pci_wakeup(struct pci_dev *dev, bool enable)
946{
947 return -ENODEV;
948}
949static inline bool acpi_pci_need_resume(struct pci_dev *dev)
950{
951 return false;
952}
953static inline pci_power_t acpi_pci_choose_state(struct pci_dev *pdev)
954{
955 return PCI_POWER_ERROR;
956}
957#endif
958
959#ifdef CONFIG_PCIEASPM
960extern const struct attribute_group aspm_ctrl_attr_group;
961#endif
962
963extern const struct attribute_group pci_dev_reset_method_attr_group;
964
965#ifdef CONFIG_X86_INTEL_MID
966bool pci_use_mid_pm(void);
967int mid_pci_set_power_state(struct pci_dev *pdev, pci_power_t state);
968pci_power_t mid_pci_get_power_state(struct pci_dev *pdev);
969#else
970static inline bool pci_use_mid_pm(void)
971{
972 return false;
973}
974static inline int mid_pci_set_power_state(struct pci_dev *pdev, pci_power_t state)
975{
976 return -ENODEV;
977}
978static inline pci_power_t mid_pci_get_power_state(struct pci_dev *pdev)
979{
980 return PCI_UNKNOWN;
981}
982#endif
983
984int pcim_intx(struct pci_dev *dev, int enable);
985int pcim_request_region_exclusive(struct pci_dev *pdev, int bar,
986 const char *name);
987void pcim_release_region(struct pci_dev *pdev, int bar);
988
989/*
990 * Config Address for PCI Configuration Mechanism #1
991 *
992 * See PCI Local Bus Specification, Revision 3.0,
993 * Section 3.2.2.3.2, Figure 3-2, p. 50.
994 */
995
996#define PCI_CONF1_BUS_SHIFT 16 /* Bus number */
997#define PCI_CONF1_DEV_SHIFT 11 /* Device number */
998#define PCI_CONF1_FUNC_SHIFT 8 /* Function number */
999
1000#define PCI_CONF1_BUS_MASK 0xff
1001#define PCI_CONF1_DEV_MASK 0x1f
1002#define PCI_CONF1_FUNC_MASK 0x7
1003#define PCI_CONF1_REG_MASK 0xfc /* Limit aligned offset to a maximum of 256B */
1004
1005#define PCI_CONF1_ENABLE BIT(31)
1006#define PCI_CONF1_BUS(x) (((x) & PCI_CONF1_BUS_MASK) << PCI_CONF1_BUS_SHIFT)
1007#define PCI_CONF1_DEV(x) (((x) & PCI_CONF1_DEV_MASK) << PCI_CONF1_DEV_SHIFT)
1008#define PCI_CONF1_FUNC(x) (((x) & PCI_CONF1_FUNC_MASK) << PCI_CONF1_FUNC_SHIFT)
1009#define PCI_CONF1_REG(x) ((x) & PCI_CONF1_REG_MASK)
1010
1011#define PCI_CONF1_ADDRESS(bus, dev, func, reg) \
1012 (PCI_CONF1_ENABLE | \
1013 PCI_CONF1_BUS(bus) | \
1014 PCI_CONF1_DEV(dev) | \
1015 PCI_CONF1_FUNC(func) | \
1016 PCI_CONF1_REG(reg))
1017
1018/*
1019 * Extension of PCI Config Address for accessing extended PCIe registers
1020 *
1021 * No standardized specification, but used on lot of non-ECAM-compliant ARM SoCs
1022 * or on AMD Barcelona and new CPUs. Reserved bits [27:24] of PCI Config Address
1023 * are used for specifying additional 4 high bits of PCI Express register.
1024 */
1025
1026#define PCI_CONF1_EXT_REG_SHIFT 16
1027#define PCI_CONF1_EXT_REG_MASK 0xf00
1028#define PCI_CONF1_EXT_REG(x) (((x) & PCI_CONF1_EXT_REG_MASK) << PCI_CONF1_EXT_REG_SHIFT)
1029
1030#define PCI_CONF1_EXT_ADDRESS(bus, dev, func, reg) \
1031 (PCI_CONF1_ADDRESS(bus, dev, func, reg) | \
1032 PCI_CONF1_EXT_REG(reg))
1033
1034#endif /* DRIVERS_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#define PCIE_LINK_RETRAIN_TIMEOUT_MS 1000
15
16/* Power stable to PERST# inactive from PCIe card Electromechanical Spec */
17#define PCIE_T_PVPERL_MS 100
18
19/*
20 * PCIe r6.0, sec 5.3.3.2.1 <PME Synchronization>
21 * Recommends 1ms to 10ms timeout to check L2 ready.
22 */
23#define PCIE_PME_TO_L2_TIMEOUT_US 10000
24
25extern const unsigned char pcie_link_speed[];
26extern bool pci_early_dump;
27
28bool pcie_cap_has_lnkctl(const struct pci_dev *dev);
29bool pcie_cap_has_lnkctl2(const struct pci_dev *dev);
30bool pcie_cap_has_rtctl(const struct pci_dev *dev);
31
32/* Functions internal to the PCI core code */
33
34int pci_create_sysfs_dev_files(struct pci_dev *pdev);
35void pci_remove_sysfs_dev_files(struct pci_dev *pdev);
36void pci_cleanup_rom(struct pci_dev *dev);
37#ifdef CONFIG_DMI
38extern const struct attribute_group pci_dev_smbios_attr_group;
39#endif
40
41enum pci_mmap_api {
42 PCI_MMAP_SYSFS, /* mmap on /sys/bus/pci/devices/<BDF>/resource<N> */
43 PCI_MMAP_PROCFS /* mmap on /proc/bus/pci/<BDF> */
44};
45int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vmai,
46 enum pci_mmap_api mmap_api);
47
48bool pci_reset_supported(struct pci_dev *dev);
49void pci_init_reset_methods(struct pci_dev *dev);
50int pci_bridge_secondary_bus_reset(struct pci_dev *dev);
51int pci_bus_error_reset(struct pci_dev *dev);
52
53struct pci_cap_saved_data {
54 u16 cap_nr;
55 bool cap_extended;
56 unsigned int size;
57 u32 data[];
58};
59
60struct pci_cap_saved_state {
61 struct hlist_node next;
62 struct pci_cap_saved_data cap;
63};
64
65void pci_allocate_cap_save_buffers(struct pci_dev *dev);
66void pci_free_cap_save_buffers(struct pci_dev *dev);
67int pci_add_cap_save_buffer(struct pci_dev *dev, char cap, unsigned int size);
68int pci_add_ext_cap_save_buffer(struct pci_dev *dev,
69 u16 cap, unsigned int size);
70struct pci_cap_saved_state *pci_find_saved_cap(struct pci_dev *dev, char cap);
71struct pci_cap_saved_state *pci_find_saved_ext_cap(struct pci_dev *dev,
72 u16 cap);
73
74#define PCI_PM_D2_DELAY 200 /* usec; see PCIe r4.0, sec 5.9.1 */
75#define PCI_PM_D3HOT_WAIT 10 /* msec */
76#define PCI_PM_D3COLD_WAIT 100 /* msec */
77
78void pci_update_current_state(struct pci_dev *dev, pci_power_t state);
79void pci_refresh_power_state(struct pci_dev *dev);
80int pci_power_up(struct pci_dev *dev);
81void pci_disable_enabled_device(struct pci_dev *dev);
82int pci_finish_runtime_suspend(struct pci_dev *dev);
83void pcie_clear_device_status(struct pci_dev *dev);
84void pcie_clear_root_pme_status(struct pci_dev *dev);
85bool pci_check_pme_status(struct pci_dev *dev);
86void pci_pme_wakeup_bus(struct pci_bus *bus);
87int __pci_pme_wakeup(struct pci_dev *dev, void *ign);
88void pci_pme_restore(struct pci_dev *dev);
89bool pci_dev_need_resume(struct pci_dev *dev);
90void pci_dev_adjust_pme(struct pci_dev *dev);
91void pci_dev_complete_resume(struct pci_dev *pci_dev);
92void pci_config_pm_runtime_get(struct pci_dev *dev);
93void pci_config_pm_runtime_put(struct pci_dev *dev);
94void pci_pm_init(struct pci_dev *dev);
95void pci_ea_init(struct pci_dev *dev);
96void pci_msi_init(struct pci_dev *dev);
97void pci_msix_init(struct pci_dev *dev);
98bool pci_bridge_d3_possible(struct pci_dev *dev);
99void pci_bridge_d3_update(struct pci_dev *dev);
100void pci_bridge_reconfigure_ltr(struct pci_dev *dev);
101int pci_bridge_wait_for_secondary_bus(struct pci_dev *dev, char *reset_type);
102
103static inline void pci_wakeup_event(struct pci_dev *dev)
104{
105 /* Wait 100 ms before the system can be put into a sleep state. */
106 pm_wakeup_event(&dev->dev, 100);
107}
108
109static inline bool pci_has_subordinate(struct pci_dev *pci_dev)
110{
111 return !!(pci_dev->subordinate);
112}
113
114static inline bool pci_power_manageable(struct pci_dev *pci_dev)
115{
116 /*
117 * Currently we allow normal PCI devices and PCI bridges transition
118 * into D3 if their bridge_d3 is set.
119 */
120 return !pci_has_subordinate(pci_dev) || pci_dev->bridge_d3;
121}
122
123static inline bool pcie_downstream_port(const struct pci_dev *dev)
124{
125 int type = pci_pcie_type(dev);
126
127 return type == PCI_EXP_TYPE_ROOT_PORT ||
128 type == PCI_EXP_TYPE_DOWNSTREAM ||
129 type == PCI_EXP_TYPE_PCIE_BRIDGE;
130}
131
132void pci_vpd_init(struct pci_dev *dev);
133void pci_vpd_release(struct pci_dev *dev);
134extern const struct attribute_group pci_dev_vpd_attr_group;
135
136/* PCI Virtual Channel */
137int pci_save_vc_state(struct pci_dev *dev);
138void pci_restore_vc_state(struct pci_dev *dev);
139void pci_allocate_vc_save_buffers(struct pci_dev *dev);
140
141/* PCI /proc functions */
142#ifdef CONFIG_PROC_FS
143int pci_proc_attach_device(struct pci_dev *dev);
144int pci_proc_detach_device(struct pci_dev *dev);
145int pci_proc_detach_bus(struct pci_bus *bus);
146#else
147static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; }
148static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; }
149static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
150#endif
151
152/* Functions for PCI Hotplug drivers to use */
153int pci_hp_add_bridge(struct pci_dev *dev);
154
155#ifdef HAVE_PCI_LEGACY
156void pci_create_legacy_files(struct pci_bus *bus);
157void pci_remove_legacy_files(struct pci_bus *bus);
158#else
159static inline void pci_create_legacy_files(struct pci_bus *bus) { }
160static inline void pci_remove_legacy_files(struct pci_bus *bus) { }
161#endif
162
163/* Lock for read/write access to pci device and bus lists */
164extern struct rw_semaphore pci_bus_sem;
165extern struct mutex pci_slot_mutex;
166
167extern raw_spinlock_t pci_lock;
168
169extern unsigned int pci_pm_d3hot_delay;
170
171#ifdef CONFIG_PCI_MSI
172void pci_no_msi(void);
173#else
174static inline void pci_no_msi(void) { }
175#endif
176
177void pci_realloc_get_opt(char *);
178
179static inline int pci_no_d1d2(struct pci_dev *dev)
180{
181 unsigned int parent_dstates = 0;
182
183 if (dev->bus->self)
184 parent_dstates = dev->bus->self->no_d1d2;
185 return (dev->no_d1d2 || parent_dstates);
186
187}
188extern const struct attribute_group *pci_dev_groups[];
189extern const struct attribute_group *pcibus_groups[];
190extern const struct device_type pci_dev_type;
191extern const struct attribute_group *pci_bus_groups[];
192
193extern unsigned long pci_hotplug_io_size;
194extern unsigned long pci_hotplug_mmio_size;
195extern unsigned long pci_hotplug_mmio_pref_size;
196extern unsigned long pci_hotplug_bus_size;
197
198/**
199 * pci_match_one_device - Tell if a PCI device structure has a matching
200 * PCI device id structure
201 * @id: single PCI device id structure to match
202 * @dev: the PCI device structure to match against
203 *
204 * Returns the matching pci_device_id structure or %NULL if there is no match.
205 */
206static inline const struct pci_device_id *
207pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev)
208{
209 if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) &&
210 (id->device == PCI_ANY_ID || id->device == dev->device) &&
211 (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) &&
212 (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) &&
213 !((id->class ^ dev->class) & id->class_mask))
214 return id;
215 return NULL;
216}
217
218/* PCI slot sysfs helper code */
219#define to_pci_slot(s) container_of(s, struct pci_slot, kobj)
220
221extern struct kset *pci_slots_kset;
222
223struct pci_slot_attribute {
224 struct attribute attr;
225 ssize_t (*show)(struct pci_slot *, char *);
226 ssize_t (*store)(struct pci_slot *, const char *, size_t);
227};
228#define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)
229
230enum pci_bar_type {
231 pci_bar_unknown, /* Standard PCI BAR probe */
232 pci_bar_io, /* An I/O port BAR */
233 pci_bar_mem32, /* A 32-bit memory BAR */
234 pci_bar_mem64, /* A 64-bit memory BAR */
235};
236
237struct device *pci_get_host_bridge_device(struct pci_dev *dev);
238void pci_put_host_bridge_device(struct device *dev);
239
240int pci_configure_extended_tags(struct pci_dev *dev, void *ign);
241bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
242 int crs_timeout);
243bool pci_bus_generic_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
244 int crs_timeout);
245int pci_idt_bus_quirk(struct pci_bus *bus, int devfn, u32 *pl, int crs_timeout);
246
247int pci_setup_device(struct pci_dev *dev);
248int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
249 struct resource *res, unsigned int reg);
250void pci_configure_ari(struct pci_dev *dev);
251void __pci_bus_size_bridges(struct pci_bus *bus,
252 struct list_head *realloc_head);
253void __pci_bus_assign_resources(const struct pci_bus *bus,
254 struct list_head *realloc_head,
255 struct list_head *fail_head);
256bool pci_bus_clip_resource(struct pci_dev *dev, int idx);
257
258const char *pci_resource_name(struct pci_dev *dev, unsigned int i);
259
260void pci_reassigndev_resource_alignment(struct pci_dev *dev);
261void pci_disable_bridge_window(struct pci_dev *dev);
262struct pci_bus *pci_bus_get(struct pci_bus *bus);
263void pci_bus_put(struct pci_bus *bus);
264
265/* PCIe link information from Link Capabilities 2 */
266#define PCIE_LNKCAP2_SLS2SPEED(lnkcap2) \
267 ((lnkcap2) & PCI_EXP_LNKCAP2_SLS_64_0GB ? PCIE_SPEED_64_0GT : \
268 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_32_0GB ? PCIE_SPEED_32_0GT : \
269 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_16_0GB ? PCIE_SPEED_16_0GT : \
270 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_8_0GB ? PCIE_SPEED_8_0GT : \
271 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_5_0GB ? PCIE_SPEED_5_0GT : \
272 (lnkcap2) & PCI_EXP_LNKCAP2_SLS_2_5GB ? PCIE_SPEED_2_5GT : \
273 PCI_SPEED_UNKNOWN)
274
275/* PCIe speed to Mb/s reduced by encoding overhead */
276#define PCIE_SPEED2MBS_ENC(speed) \
277 ((speed) == PCIE_SPEED_64_0GT ? 64000*1/1 : \
278 (speed) == PCIE_SPEED_32_0GT ? 32000*128/130 : \
279 (speed) == PCIE_SPEED_16_0GT ? 16000*128/130 : \
280 (speed) == PCIE_SPEED_8_0GT ? 8000*128/130 : \
281 (speed) == PCIE_SPEED_5_0GT ? 5000*8/10 : \
282 (speed) == PCIE_SPEED_2_5GT ? 2500*8/10 : \
283 0)
284
285const char *pci_speed_string(enum pci_bus_speed speed);
286enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev);
287enum pcie_link_width pcie_get_width_cap(struct pci_dev *dev);
288u32 pcie_bandwidth_capable(struct pci_dev *dev, enum pci_bus_speed *speed,
289 enum pcie_link_width *width);
290void __pcie_print_link_status(struct pci_dev *dev, bool verbose);
291void pcie_report_downtraining(struct pci_dev *dev);
292void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
293
294/* Single Root I/O Virtualization */
295struct pci_sriov {
296 int pos; /* Capability position */
297 int nres; /* Number of resources */
298 u32 cap; /* SR-IOV Capabilities */
299 u16 ctrl; /* SR-IOV Control */
300 u16 total_VFs; /* Total VFs associated with the PF */
301 u16 initial_VFs; /* Initial VFs associated with the PF */
302 u16 num_VFs; /* Number of VFs available */
303 u16 offset; /* First VF Routing ID offset */
304 u16 stride; /* Following VF stride */
305 u16 vf_device; /* VF device ID */
306 u32 pgsz; /* Page size for BAR alignment */
307 u8 link; /* Function Dependency Link */
308 u8 max_VF_buses; /* Max buses consumed by VFs */
309 u16 driver_max_VFs; /* Max num VFs driver supports */
310 struct pci_dev *dev; /* Lowest numbered PF */
311 struct pci_dev *self; /* This PF */
312 u32 class; /* VF device */
313 u8 hdr_type; /* VF header type */
314 u16 subsystem_vendor; /* VF subsystem vendor */
315 u16 subsystem_device; /* VF subsystem device */
316 resource_size_t barsz[PCI_SRIOV_NUM_BARS]; /* VF BAR size */
317 bool drivers_autoprobe; /* Auto probing of VFs by driver */
318};
319
320#ifdef CONFIG_PCI_DOE
321void pci_doe_init(struct pci_dev *pdev);
322void pci_doe_destroy(struct pci_dev *pdev);
323void pci_doe_disconnected(struct pci_dev *pdev);
324#else
325static inline void pci_doe_init(struct pci_dev *pdev) { }
326static inline void pci_doe_destroy(struct pci_dev *pdev) { }
327static inline void pci_doe_disconnected(struct pci_dev *pdev) { }
328#endif
329
330/**
331 * pci_dev_set_io_state - Set the new error state if possible.
332 *
333 * @dev: PCI device to set new error_state
334 * @new: the state we want dev to be in
335 *
336 * If the device is experiencing perm_failure, it has to remain in that state.
337 * Any other transition is allowed.
338 *
339 * Returns true if state has been changed to the requested state.
340 */
341static inline bool pci_dev_set_io_state(struct pci_dev *dev,
342 pci_channel_state_t new)
343{
344 pci_channel_state_t old;
345
346 switch (new) {
347 case pci_channel_io_perm_failure:
348 xchg(&dev->error_state, pci_channel_io_perm_failure);
349 return true;
350 case pci_channel_io_frozen:
351 old = cmpxchg(&dev->error_state, pci_channel_io_normal,
352 pci_channel_io_frozen);
353 return old != pci_channel_io_perm_failure;
354 case pci_channel_io_normal:
355 old = cmpxchg(&dev->error_state, pci_channel_io_frozen,
356 pci_channel_io_normal);
357 return old != pci_channel_io_perm_failure;
358 default:
359 return false;
360 }
361}
362
363static inline int pci_dev_set_disconnected(struct pci_dev *dev, void *unused)
364{
365 pci_dev_set_io_state(dev, pci_channel_io_perm_failure);
366 pci_doe_disconnected(dev);
367
368 return 0;
369}
370
371static inline bool pci_dev_is_disconnected(const struct pci_dev *dev)
372{
373 return dev->error_state == pci_channel_io_perm_failure;
374}
375
376/* pci_dev priv_flags */
377#define PCI_DEV_ADDED 0
378#define PCI_DPC_RECOVERED 1
379#define PCI_DPC_RECOVERING 2
380
381static inline void pci_dev_assign_added(struct pci_dev *dev, bool added)
382{
383 assign_bit(PCI_DEV_ADDED, &dev->priv_flags, added);
384}
385
386static inline bool pci_dev_is_added(const struct pci_dev *dev)
387{
388 return test_bit(PCI_DEV_ADDED, &dev->priv_flags);
389}
390
391#ifdef CONFIG_PCIEAER
392#include <linux/aer.h>
393
394#define AER_MAX_MULTI_ERR_DEVICES 5 /* Not likely to have more */
395
396struct aer_err_info {
397 struct pci_dev *dev[AER_MAX_MULTI_ERR_DEVICES];
398 int error_dev_num;
399
400 unsigned int id:16;
401
402 unsigned int severity:2; /* 0:NONFATAL | 1:FATAL | 2:COR */
403 unsigned int __pad1:5;
404 unsigned int multi_error_valid:1;
405
406 unsigned int first_error:5;
407 unsigned int __pad2:2;
408 unsigned int tlp_header_valid:1;
409
410 unsigned int status; /* COR/UNCOR Error Status */
411 unsigned int mask; /* COR/UNCOR Error Mask */
412 struct aer_header_log_regs tlp; /* TLP Header */
413};
414
415int aer_get_device_error_info(struct pci_dev *dev, struct aer_err_info *info);
416void aer_print_error(struct pci_dev *dev, struct aer_err_info *info);
417#endif /* CONFIG_PCIEAER */
418
419#ifdef CONFIG_PCIEPORTBUS
420/* Cached RCEC Endpoint Association */
421struct rcec_ea {
422 u8 nextbusn;
423 u8 lastbusn;
424 u32 bitmap;
425};
426#endif
427
428#ifdef CONFIG_PCIE_DPC
429void pci_save_dpc_state(struct pci_dev *dev);
430void pci_restore_dpc_state(struct pci_dev *dev);
431void pci_dpc_init(struct pci_dev *pdev);
432void dpc_process_error(struct pci_dev *pdev);
433pci_ers_result_t dpc_reset_link(struct pci_dev *pdev);
434bool pci_dpc_recovered(struct pci_dev *pdev);
435#else
436static inline void pci_save_dpc_state(struct pci_dev *dev) { }
437static inline void pci_restore_dpc_state(struct pci_dev *dev) { }
438static inline void pci_dpc_init(struct pci_dev *pdev) { }
439static inline bool pci_dpc_recovered(struct pci_dev *pdev) { return false; }
440#endif
441
442#ifdef CONFIG_PCIEPORTBUS
443void pci_rcec_init(struct pci_dev *dev);
444void pci_rcec_exit(struct pci_dev *dev);
445void pcie_link_rcec(struct pci_dev *rcec);
446void pcie_walk_rcec(struct pci_dev *rcec,
447 int (*cb)(struct pci_dev *, void *),
448 void *userdata);
449#else
450static inline void pci_rcec_init(struct pci_dev *dev) { }
451static inline void pci_rcec_exit(struct pci_dev *dev) { }
452static inline void pcie_link_rcec(struct pci_dev *rcec) { }
453static inline void pcie_walk_rcec(struct pci_dev *rcec,
454 int (*cb)(struct pci_dev *, void *),
455 void *userdata) { }
456#endif
457
458#ifdef CONFIG_PCI_ATS
459/* Address Translation Service */
460void pci_ats_init(struct pci_dev *dev);
461void pci_restore_ats_state(struct pci_dev *dev);
462#else
463static inline void pci_ats_init(struct pci_dev *d) { }
464static inline void pci_restore_ats_state(struct pci_dev *dev) { }
465#endif /* CONFIG_PCI_ATS */
466
467#ifdef CONFIG_PCI_PRI
468void pci_pri_init(struct pci_dev *dev);
469void pci_restore_pri_state(struct pci_dev *pdev);
470#else
471static inline void pci_pri_init(struct pci_dev *dev) { }
472static inline void pci_restore_pri_state(struct pci_dev *pdev) { }
473#endif
474
475#ifdef CONFIG_PCI_PASID
476void pci_pasid_init(struct pci_dev *dev);
477void pci_restore_pasid_state(struct pci_dev *pdev);
478#else
479static inline void pci_pasid_init(struct pci_dev *dev) { }
480static inline void pci_restore_pasid_state(struct pci_dev *pdev) { }
481#endif
482
483#ifdef CONFIG_PCI_IOV
484int pci_iov_init(struct pci_dev *dev);
485void pci_iov_release(struct pci_dev *dev);
486void pci_iov_remove(struct pci_dev *dev);
487void pci_iov_update_resource(struct pci_dev *dev, int resno);
488resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno);
489void pci_restore_iov_state(struct pci_dev *dev);
490int pci_iov_bus_range(struct pci_bus *bus);
491extern const struct attribute_group sriov_pf_dev_attr_group;
492extern const struct attribute_group sriov_vf_dev_attr_group;
493#else
494static inline int pci_iov_init(struct pci_dev *dev)
495{
496 return -ENODEV;
497}
498static inline void pci_iov_release(struct pci_dev *dev) { }
499static inline void pci_iov_remove(struct pci_dev *dev) { }
500static inline void pci_restore_iov_state(struct pci_dev *dev) { }
501static inline int pci_iov_bus_range(struct pci_bus *bus)
502{
503 return 0;
504}
505
506#endif /* CONFIG_PCI_IOV */
507
508#ifdef CONFIG_PCIE_PTM
509void pci_ptm_init(struct pci_dev *dev);
510void pci_save_ptm_state(struct pci_dev *dev);
511void pci_restore_ptm_state(struct pci_dev *dev);
512void pci_suspend_ptm(struct pci_dev *dev);
513void pci_resume_ptm(struct pci_dev *dev);
514#else
515static inline void pci_ptm_init(struct pci_dev *dev) { }
516static inline void pci_save_ptm_state(struct pci_dev *dev) { }
517static inline void pci_restore_ptm_state(struct pci_dev *dev) { }
518static inline void pci_suspend_ptm(struct pci_dev *dev) { }
519static inline void pci_resume_ptm(struct pci_dev *dev) { }
520#endif
521
522unsigned long pci_cardbus_resource_alignment(struct resource *);
523
524static inline resource_size_t pci_resource_alignment(struct pci_dev *dev,
525 struct resource *res)
526{
527#ifdef CONFIG_PCI_IOV
528 int resno = res - dev->resource;
529
530 if (resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END)
531 return pci_sriov_resource_alignment(dev, resno);
532#endif
533 if (dev->class >> 8 == PCI_CLASS_BRIDGE_CARDBUS)
534 return pci_cardbus_resource_alignment(res);
535 return resource_alignment(res);
536}
537
538void pci_acs_init(struct pci_dev *dev);
539#ifdef CONFIG_PCI_QUIRKS
540int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags);
541int pci_dev_specific_enable_acs(struct pci_dev *dev);
542int pci_dev_specific_disable_acs_redir(struct pci_dev *dev);
543bool pcie_failed_link_retrain(struct pci_dev *dev);
544#else
545static inline int pci_dev_specific_acs_enabled(struct pci_dev *dev,
546 u16 acs_flags)
547{
548 return -ENOTTY;
549}
550static inline int pci_dev_specific_enable_acs(struct pci_dev *dev)
551{
552 return -ENOTTY;
553}
554static inline int pci_dev_specific_disable_acs_redir(struct pci_dev *dev)
555{
556 return -ENOTTY;
557}
558static inline bool pcie_failed_link_retrain(struct pci_dev *dev)
559{
560 return false;
561}
562#endif
563
564/* PCI error reporting and recovery */
565pci_ers_result_t pcie_do_recovery(struct pci_dev *dev,
566 pci_channel_state_t state,
567 pci_ers_result_t (*reset_subordinates)(struct pci_dev *pdev));
568
569bool pcie_wait_for_link(struct pci_dev *pdev, bool active);
570int pcie_retrain_link(struct pci_dev *pdev, bool use_lt);
571#ifdef CONFIG_PCIEASPM
572void pcie_aspm_init_link_state(struct pci_dev *pdev);
573void pcie_aspm_exit_link_state(struct pci_dev *pdev);
574void pcie_aspm_pm_state_change(struct pci_dev *pdev, bool locked);
575void pcie_aspm_powersave_config_link(struct pci_dev *pdev);
576#else
577static inline void pcie_aspm_init_link_state(struct pci_dev *pdev) { }
578static inline void pcie_aspm_exit_link_state(struct pci_dev *pdev) { }
579static inline void pcie_aspm_pm_state_change(struct pci_dev *pdev, bool locked) { }
580static inline void pcie_aspm_powersave_config_link(struct pci_dev *pdev) { }
581#endif
582
583#ifdef CONFIG_PCIE_ECRC
584void pcie_set_ecrc_checking(struct pci_dev *dev);
585void pcie_ecrc_get_policy(char *str);
586#else
587static inline void pcie_set_ecrc_checking(struct pci_dev *dev) { }
588static inline void pcie_ecrc_get_policy(char *str) { }
589#endif
590
591struct pci_dev_reset_methods {
592 u16 vendor;
593 u16 device;
594 int (*reset)(struct pci_dev *dev, bool probe);
595};
596
597struct pci_reset_fn_method {
598 int (*reset_fn)(struct pci_dev *pdev, bool probe);
599 char *name;
600};
601
602#ifdef CONFIG_PCI_QUIRKS
603int pci_dev_specific_reset(struct pci_dev *dev, bool probe);
604#else
605static inline int pci_dev_specific_reset(struct pci_dev *dev, bool probe)
606{
607 return -ENOTTY;
608}
609#endif
610
611#if defined(CONFIG_PCI_QUIRKS) && defined(CONFIG_ARM64)
612int acpi_get_rc_resources(struct device *dev, const char *hid, u16 segment,
613 struct resource *res);
614#else
615static inline int acpi_get_rc_resources(struct device *dev, const char *hid,
616 u16 segment, struct resource *res)
617{
618 return -ENODEV;
619}
620#endif
621
622int pci_rebar_get_current_size(struct pci_dev *pdev, int bar);
623int pci_rebar_set_size(struct pci_dev *pdev, int bar, int size);
624static inline u64 pci_rebar_size_to_bytes(int size)
625{
626 return 1ULL << (size + 20);
627}
628
629struct device_node;
630
631#ifdef CONFIG_OF
632int of_pci_parse_bus_range(struct device_node *node, struct resource *res);
633int of_get_pci_domain_nr(struct device_node *node);
634int of_pci_get_max_link_speed(struct device_node *node);
635u32 of_pci_get_slot_power_limit(struct device_node *node,
636 u8 *slot_power_limit_value,
637 u8 *slot_power_limit_scale);
638int pci_set_of_node(struct pci_dev *dev);
639void pci_release_of_node(struct pci_dev *dev);
640void pci_set_bus_of_node(struct pci_bus *bus);
641void pci_release_bus_of_node(struct pci_bus *bus);
642
643int devm_of_pci_bridge_init(struct device *dev, struct pci_host_bridge *bridge);
644
645#else
646static inline int
647of_pci_parse_bus_range(struct device_node *node, struct resource *res)
648{
649 return -EINVAL;
650}
651
652static inline int
653of_get_pci_domain_nr(struct device_node *node)
654{
655 return -1;
656}
657
658static inline int
659of_pci_get_max_link_speed(struct device_node *node)
660{
661 return -EINVAL;
662}
663
664static inline u32
665of_pci_get_slot_power_limit(struct device_node *node,
666 u8 *slot_power_limit_value,
667 u8 *slot_power_limit_scale)
668{
669 if (slot_power_limit_value)
670 *slot_power_limit_value = 0;
671 if (slot_power_limit_scale)
672 *slot_power_limit_scale = 0;
673 return 0;
674}
675
676static inline int pci_set_of_node(struct pci_dev *dev) { return 0; }
677static inline void pci_release_of_node(struct pci_dev *dev) { }
678static inline void pci_set_bus_of_node(struct pci_bus *bus) { }
679static inline void pci_release_bus_of_node(struct pci_bus *bus) { }
680
681static inline int devm_of_pci_bridge_init(struct device *dev, struct pci_host_bridge *bridge)
682{
683 return 0;
684}
685
686#endif /* CONFIG_OF */
687
688struct of_changeset;
689
690#ifdef CONFIG_PCI_DYNAMIC_OF_NODES
691void of_pci_make_dev_node(struct pci_dev *pdev);
692void of_pci_remove_node(struct pci_dev *pdev);
693int of_pci_add_properties(struct pci_dev *pdev, struct of_changeset *ocs,
694 struct device_node *np);
695#else
696static inline void of_pci_make_dev_node(struct pci_dev *pdev) { }
697static inline void of_pci_remove_node(struct pci_dev *pdev) { }
698#endif
699
700#ifdef CONFIG_PCIEAER
701void pci_no_aer(void);
702void pci_aer_init(struct pci_dev *dev);
703void pci_aer_exit(struct pci_dev *dev);
704extern const struct attribute_group aer_stats_attr_group;
705void pci_aer_clear_fatal_status(struct pci_dev *dev);
706int pci_aer_clear_status(struct pci_dev *dev);
707int pci_aer_raw_clear_status(struct pci_dev *dev);
708void pci_save_aer_state(struct pci_dev *dev);
709void pci_restore_aer_state(struct pci_dev *dev);
710#else
711static inline void pci_no_aer(void) { }
712static inline void pci_aer_init(struct pci_dev *d) { }
713static inline void pci_aer_exit(struct pci_dev *d) { }
714static inline void pci_aer_clear_fatal_status(struct pci_dev *dev) { }
715static inline int pci_aer_clear_status(struct pci_dev *dev) { return -EINVAL; }
716static inline int pci_aer_raw_clear_status(struct pci_dev *dev) { return -EINVAL; }
717static inline void pci_save_aer_state(struct pci_dev *dev) { }
718static inline void pci_restore_aer_state(struct pci_dev *dev) { }
719#endif
720
721#ifdef CONFIG_ACPI
722int pci_acpi_program_hp_params(struct pci_dev *dev);
723extern const struct attribute_group pci_dev_acpi_attr_group;
724void pci_set_acpi_fwnode(struct pci_dev *dev);
725int pci_dev_acpi_reset(struct pci_dev *dev, bool probe);
726bool acpi_pci_power_manageable(struct pci_dev *dev);
727bool acpi_pci_bridge_d3(struct pci_dev *dev);
728int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state);
729pci_power_t acpi_pci_get_power_state(struct pci_dev *dev);
730void acpi_pci_refresh_power_state(struct pci_dev *dev);
731int acpi_pci_wakeup(struct pci_dev *dev, bool enable);
732bool acpi_pci_need_resume(struct pci_dev *dev);
733pci_power_t acpi_pci_choose_state(struct pci_dev *pdev);
734#else
735static inline int pci_dev_acpi_reset(struct pci_dev *dev, bool probe)
736{
737 return -ENOTTY;
738}
739static inline void pci_set_acpi_fwnode(struct pci_dev *dev) { }
740static inline int pci_acpi_program_hp_params(struct pci_dev *dev)
741{
742 return -ENODEV;
743}
744static inline bool acpi_pci_power_manageable(struct pci_dev *dev)
745{
746 return false;
747}
748static inline bool acpi_pci_bridge_d3(struct pci_dev *dev)
749{
750 return false;
751}
752static inline int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
753{
754 return -ENODEV;
755}
756static inline pci_power_t acpi_pci_get_power_state(struct pci_dev *dev)
757{
758 return PCI_UNKNOWN;
759}
760static inline void acpi_pci_refresh_power_state(struct pci_dev *dev) { }
761static inline int acpi_pci_wakeup(struct pci_dev *dev, bool enable)
762{
763 return -ENODEV;
764}
765static inline bool acpi_pci_need_resume(struct pci_dev *dev)
766{
767 return false;
768}
769static inline pci_power_t acpi_pci_choose_state(struct pci_dev *pdev)
770{
771 return PCI_POWER_ERROR;
772}
773#endif
774
775#ifdef CONFIG_PCIEASPM
776extern const struct attribute_group aspm_ctrl_attr_group;
777#endif
778
779extern const struct attribute_group pci_dev_reset_method_attr_group;
780
781#ifdef CONFIG_X86_INTEL_MID
782bool pci_use_mid_pm(void);
783int mid_pci_set_power_state(struct pci_dev *pdev, pci_power_t state);
784pci_power_t mid_pci_get_power_state(struct pci_dev *pdev);
785#else
786static inline bool pci_use_mid_pm(void)
787{
788 return false;
789}
790static inline int mid_pci_set_power_state(struct pci_dev *pdev, pci_power_t state)
791{
792 return -ENODEV;
793}
794static inline pci_power_t mid_pci_get_power_state(struct pci_dev *pdev)
795{
796 return PCI_UNKNOWN;
797}
798#endif
799
800/*
801 * Config Address for PCI Configuration Mechanism #1
802 *
803 * See PCI Local Bus Specification, Revision 3.0,
804 * Section 3.2.2.3.2, Figure 3-2, p. 50.
805 */
806
807#define PCI_CONF1_BUS_SHIFT 16 /* Bus number */
808#define PCI_CONF1_DEV_SHIFT 11 /* Device number */
809#define PCI_CONF1_FUNC_SHIFT 8 /* Function number */
810
811#define PCI_CONF1_BUS_MASK 0xff
812#define PCI_CONF1_DEV_MASK 0x1f
813#define PCI_CONF1_FUNC_MASK 0x7
814#define PCI_CONF1_REG_MASK 0xfc /* Limit aligned offset to a maximum of 256B */
815
816#define PCI_CONF1_ENABLE BIT(31)
817#define PCI_CONF1_BUS(x) (((x) & PCI_CONF1_BUS_MASK) << PCI_CONF1_BUS_SHIFT)
818#define PCI_CONF1_DEV(x) (((x) & PCI_CONF1_DEV_MASK) << PCI_CONF1_DEV_SHIFT)
819#define PCI_CONF1_FUNC(x) (((x) & PCI_CONF1_FUNC_MASK) << PCI_CONF1_FUNC_SHIFT)
820#define PCI_CONF1_REG(x) ((x) & PCI_CONF1_REG_MASK)
821
822#define PCI_CONF1_ADDRESS(bus, dev, func, reg) \
823 (PCI_CONF1_ENABLE | \
824 PCI_CONF1_BUS(bus) | \
825 PCI_CONF1_DEV(dev) | \
826 PCI_CONF1_FUNC(func) | \
827 PCI_CONF1_REG(reg))
828
829/*
830 * Extension of PCI Config Address for accessing extended PCIe registers
831 *
832 * No standardized specification, but used on lot of non-ECAM-compliant ARM SoCs
833 * or on AMD Barcelona and new CPUs. Reserved bits [27:24] of PCI Config Address
834 * are used for specifying additional 4 high bits of PCI Express register.
835 */
836
837#define PCI_CONF1_EXT_REG_SHIFT 16
838#define PCI_CONF1_EXT_REG_MASK 0xf00
839#define PCI_CONF1_EXT_REG(x) (((x) & PCI_CONF1_EXT_REG_MASK) << PCI_CONF1_EXT_REG_SHIFT)
840
841#define PCI_CONF1_EXT_ADDRESS(bus, dev, func, reg) \
842 (PCI_CONF1_ADDRESS(bus, dev, func, reg) | \
843 PCI_CONF1_EXT_REG(reg))
844
845#endif /* DRIVERS_PCI_H */