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PCI: Do not wait for disconnected devices when resuming
[linux-2.6-block.git] / include / linux / pci.h
CommitLineData
b2441318 1/* SPDX-License-Identifier: GPL-2.0 */
1da177e4
LT		 2/*
3 * pci.h
4 *
5 * PCI defines and function prototypes
6 * Copyright 1994, Drew Eckhardt
7 * Copyright 1997--1999 Martin Mares <mj@ucw.cz>
8 *
7ce2e76a
KW		 9 * PCI Express ASPM defines and function prototypes
10 * Copyright (c) 2007 Intel Corp.
11 * Zhang Yanmin (yanmin.zhang@intel.com)
12 * Shaohua Li (shaohua.li@intel.com)
13 *
1da177e4
LT		 14 * For more information, please consult the following manuals (look at
15 * http://www.pcisig.com/ for how to get them):
16 *
17 * PCI BIOS Specification
18 * PCI Local Bus Specification
19 * PCI to PCI Bridge Specification
7ce2e76a 20 * PCI Express Specification
1da177e4
LT		 21 * PCI System Design Guide
22 */
1da177e4
LT		 23#ifndef LINUX_PCI_H
24#define LINUX_PCI_H
25
b229baa3 26#include <linux/args.h>
778382e0
DW		 27#include <linux/mod_devicetable.h>
28
1da177e4 29#include <linux/types.h>
98db6f19 30#include <linux/init.h>
1da177e4
LT		 31#include <linux/ioport.h>
32#include <linux/list.h>
4a7fb636 33#include <linux/compiler.h>
1da177e4 34#include <linux/errno.h>
f46753c5 35#include <linux/kobject.h>
60063497 36#include <linux/atomic.h>
1da177e4 37#include <linux/device.h>
704e8953 38#include <linux/interrupt.h>
1388cc96 39#include <linux/io.h>
14d76b68 40#include <linux/resource_ext.h>
34026364 41#include <linux/msi_api.h>
607ca46e 42#include <uapi/linux/pci.h>
1da177e4 43
7e7a43c3
AB		 44#include <linux/pci_ids.h>
45
d6e055e8
HK		 46#define PCI_STATUS_ERROR_BITS (PCI_STATUS_DETECTED_PARITY | \
47 PCI_STATUS_SIG_SYSTEM_ERROR | \
48 PCI_STATUS_REC_MASTER_ABORT | \
49 PCI_STATUS_REC_TARGET_ABORT | \
50 PCI_STATUS_SIG_TARGET_ABORT | \
51 PCI_STATUS_PARITY)
52
e20afa06 53/* Number of reset methods used in pci_reset_fn_methods array in pci.c */
6937b7dd 54#define PCI_NUM_RESET_METHODS 7
e20afa06 55
9bdc81ce
AN		 56#define PCI_RESET_PROBE true
57#define PCI_RESET_DO_RESET false
58
85467136
SK		 59/*
60 * The PCI interface treats multi-function devices as independent
61 * devices. The slot/function address of each device is encoded
62 * in a single byte as follows:
63 *
64 * 7:3 = slot
65 * 2:0 = function
f7625980
BH		 66 *
67 * PCI_DEVFN(), PCI_SLOT(), and PCI_FUNC() are defined in uapi/linux/pci.h.
85467136 68 * In the interest of not exposing interfaces to user-space unnecessarily,
f7625980 69 * the following kernel-only defines are being added here.
85467136 70 */
0aa0f5d1 71#define PCI_DEVID(bus, devfn) ((((u16)(bus)) << 8) | (devfn))
85467136
SK		 72/* return bus from PCI devid = ((u16)bus_number) << 8) | devfn */
73#define PCI_BUS_NUM(x) (((x) >> 8) & 0xff)
74
f46753c5
AC		 75/* pci_slot represents a physical slot */
76struct pci_slot {
0aa0f5d1
BH		 77 struct pci_bus *bus; /* Bus this slot is on */
78 struct list_head list; /* Node in list of slots */
79 struct hotplug_slot *hotplug; /* Hotplug info (move here) */
80 unsigned char number; /* PCI_SLOT(pci_dev->devfn) */
81 struct kobject kobj;
f46753c5
AC		 82};
83
0ad772ec
AC		 84static inline const char *pci_slot_name(const struct pci_slot *slot)
85{
86 return kobject_name(&slot->kobj);
87}
88
1da177e4
LT		 89/* File state for mmap()s on /proc/bus/pci/X/Y */
90enum pci_mmap_state {
91 pci_mmap_io,
92 pci_mmap_mem
93};
94
0aa0f5d1 95/* For PCI devices, the region numbers are assigned this way: */
fde09c6d
YZ		 96enum {
97 /* #0-5: standard PCI resources */
98 PCI_STD_RESOURCES,
c9c13ba4 99 PCI_STD_RESOURCE_END = PCI_STD_RESOURCES + PCI_STD_NUM_BARS - 1,
fde09c6d
YZ		 100
101 /* #6: expansion ROM resource */
102 PCI_ROM_RESOURCE,
103
0aa0f5d1 104 /* Device-specific resources */
d1b054da
YZ		 105#ifdef CONFIG_PCI_IOV
106 PCI_IOV_RESOURCES,
107 PCI_IOV_RESOURCE_END = PCI_IOV_RESOURCES + PCI_SRIOV_NUM_BARS - 1,
108#endif
109
6e0688db
KW		 110/* PCI-to-PCI (P2P) bridge windows */
111#define PCI_BRIDGE_IO_WINDOW (PCI_BRIDGE_RESOURCES + 0)
112#define PCI_BRIDGE_MEM_WINDOW (PCI_BRIDGE_RESOURCES + 1)
113#define PCI_BRIDGE_PREF_MEM_WINDOW (PCI_BRIDGE_RESOURCES + 2)
114
115/* CardBus bridge windows */
116#define PCI_CB_BRIDGE_IO_0_WINDOW (PCI_BRIDGE_RESOURCES + 0)
117#define PCI_CB_BRIDGE_IO_1_WINDOW (PCI_BRIDGE_RESOURCES + 1)
118#define PCI_CB_BRIDGE_MEM_0_WINDOW (PCI_BRIDGE_RESOURCES + 2)
119#define PCI_CB_BRIDGE_MEM_1_WINDOW (PCI_BRIDGE_RESOURCES + 3)
120
121/* Total number of bridge resources for P2P and CardBus */
fde09c6d
YZ		 122#define PCI_BRIDGE_RESOURCE_NUM 4
123
6e0688db 124 /* Resources assigned to buses behind the bridge */
fde09c6d
YZ		 125 PCI_BRIDGE_RESOURCES,
126 PCI_BRIDGE_RESOURCE_END = PCI_BRIDGE_RESOURCES +
127 PCI_BRIDGE_RESOURCE_NUM - 1,
128
0aa0f5d1 129 /* Total resources associated with a PCI device */
fde09c6d
YZ		 130 PCI_NUM_RESOURCES,
131
0aa0f5d1 132 /* Preserve this for compatibility */
cda57bf9 133 DEVICE_COUNT_RESOURCE = PCI_NUM_RESOURCES,
fde09c6d 134};
1da177e4 135
b352baf1
PB		 136/**
137 * enum pci_interrupt_pin - PCI INTx interrupt values
138 * @PCI_INTERRUPT_UNKNOWN: Unknown or unassigned interrupt
139 * @PCI_INTERRUPT_INTA: PCI INTA pin
140 * @PCI_INTERRUPT_INTB: PCI INTB pin
141 * @PCI_INTERRUPT_INTC: PCI INTC pin
142 * @PCI_INTERRUPT_INTD: PCI INTD pin
143 *
144 * Corresponds to values for legacy PCI INTx interrupts, as can be found in the
145 * PCI_INTERRUPT_PIN register.
146 */
147enum pci_interrupt_pin {
148 PCI_INTERRUPT_UNKNOWN,
149 PCI_INTERRUPT_INTA,
150 PCI_INTERRUPT_INTB,
151 PCI_INTERRUPT_INTC,
152 PCI_INTERRUPT_INTD,
153};
154
155/* The number of legacy PCI INTx interrupts */
156#define PCI_NUM_INTX 4
157
57bdeef4
NN		 158/*
159 * Reading from a device that doesn't respond typically returns ~0. A
160 * successful read from a device may also return ~0, so you need additional
161 * information to reliably identify errors.
162 */
163#define PCI_ERROR_RESPONSE (~0ULL)
164#define PCI_SET_ERROR_RESPONSE(val) (*(val) = ((typeof(*(val))) PCI_ERROR_RESPONSE))
165#define PCI_POSSIBLE_ERROR(val) ((val) == ((typeof(val)) PCI_ERROR_RESPONSE))
166
224abb67
BH		 167/*
168 * pci_power_t values must match the bits in the Capabilities PME_Support
169 * and Control/Status PowerState fields in the Power Management capability.
170 */
1da177e4
LT		 171typedef int __bitwise pci_power_t;
172
4352dfd5
GKH		 173#define PCI_D0 ((pci_power_t __force) 0)
174#define PCI_D1 ((pci_power_t __force) 1)
175#define PCI_D2 ((pci_power_t __force) 2)
1da177e4
LT		 176#define PCI_D3hot ((pci_power_t __force) 3)
177#define PCI_D3cold ((pci_power_t __force) 4)
3fe9d19f 178#define PCI_UNKNOWN ((pci_power_t __force) 5)
438510f6 179#define PCI_POWER_ERROR ((pci_power_t __force) -1)
1da177e4 180
00240c38
AS		 181/* Remember to update this when the list above changes! */
182extern const char *pci_power_names[];
183
184static inline const char *pci_power_name(pci_power_t state)
185{
9661e783 186 return pci_power_names[1 + (__force int) state];
00240c38
AS		 187}
188
0aa0f5d1 189/**
229b4e07
CD		 190 * typedef pci_channel_state_t
191 *
0aa0f5d1
BH		 192 * The pci_channel state describes connectivity between the CPU and
193 * the PCI device. If some PCI bus between here and the PCI device
194 * has crashed or locked up, this info is reflected here.
392a1ce7 195 */
196typedef unsigned int __bitwise pci_channel_state_t;
197
16d79cd4 198enum {
392a1ce7 199 /* I/O channel is in normal state */
200 pci_channel_io_normal = (__force pci_channel_state_t) 1,
201
202 /* I/O to channel is blocked */
203 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
204
205 /* PCI card is dead */
206 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
207};
208
f7bdd12d
BK		 209typedef unsigned int __bitwise pcie_reset_state_t;
210
211enum pcie_reset_state {
212 /* Reset is NOT asserted (Use to deassert reset) */
213 pcie_deassert_reset = (__force pcie_reset_state_t) 1,
214
f7625980 215 /* Use #PERST to reset PCIe device */
f7bdd12d
BK		 216 pcie_warm_reset = (__force pcie_reset_state_t) 2,
217
f7625980 218 /* Use PCIe Hot Reset to reset device */
f7bdd12d
BK		 219 pcie_hot_reset = (__force pcie_reset_state_t) 3
220};
221
ba698ad4
DM		 222typedef unsigned short __bitwise pci_dev_flags_t;
223enum pci_dev_flags {
0aa0f5d1 224 /* INTX_DISABLE in PCI_COMMAND register disables MSI too */
6b121592 225 PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) (1 << 0),
979b1791 226 /* Device configuration is irrevocably lost if disabled into D3 */
6b121592 227 PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) (1 << 1),
6777829c 228 /* Provide indication device is assigned by a Virtual Machine Manager */
6b121592 229 PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) (1 << 2),
5757a769 230 /* Flag for quirk use to store if quirk-specific ACS is enabled */
6b121592 231 PCI_DEV_FLAGS_ACS_ENABLED_QUIRK = (__force pci_dev_flags_t) (1 << 3),
c8fe16e3
AW		 232 /* Use a PCIe-to-PCI bridge alias even if !pci_is_pcie */
233 PCI_DEV_FLAG_PCIE_BRIDGE_ALIAS = (__force pci_dev_flags_t) (1 << 5),
f331a859
AW		 234 /* Do not use bus resets for device */
235 PCI_DEV_FLAGS_NO_BUS_RESET = (__force pci_dev_flags_t) (1 << 6),
51e53738
AW		 236 /* Do not use PM reset even if device advertises NoSoftRst- */
237 PCI_DEV_FLAGS_NO_PM_RESET = (__force pci_dev_flags_t) (1 << 7),
932c435c
MR		 238 /* Get VPD from function 0 VPD */
239 PCI_DEV_FLAGS_VPD_REF_F0 = (__force pci_dev_flags_t) (1 << 8),
0aa0f5d1 240 /* A non-root bridge where translation occurs, stop alias search here */
ffff8858 241 PCI_DEV_FLAGS_BRIDGE_XLATE_ROOT = (__force pci_dev_flags_t) (1 << 9),
f65fd1aa
SN		 242 /* Do not use FLR even if device advertises PCI_AF_CAP */
243 PCI_DEV_FLAGS_NO_FLR_RESET = (__force pci_dev_flags_t) (1 << 10),
a99b646a 244 /* Don't use Relaxed Ordering for TLPs directed at this device */
c2eac4d3 245 PCI_DEV_FLAGS_NO_RELAXED_ORDERING = (__force pci_dev_flags_t) (1 << 11),
2226667a
MZ		 246 /* Device does honor MSI masking despite saying otherwise */
247 PCI_DEV_FLAGS_HAS_MSI_MASKING = (__force pci_dev_flags_t) (1 << 12),
ba698ad4
DM		 248};
249
e1d3a908
SA		 250enum pci_irq_reroute_variant {
251 INTEL_IRQ_REROUTE_VARIANT = 1,
252 MAX_IRQ_REROUTE_VARIANTS = 3
253};
254
6e325a62
MT		 255typedef unsigned short __bitwise pci_bus_flags_t;
256enum pci_bus_flags {
032c3d86
JD		 257 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
258 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
259 PCI_BUS_FLAGS_NO_AERSID = (__force pci_bus_flags_t) 4,
17e8f0d4 260 PCI_BUS_FLAGS_NO_EXTCFG = (__force pci_bus_flags_t) 8,
6e325a62
MT		 261};
262
0aa0f5d1 263/* Values from Link Status register, PCIe r3.1, sec 7.8.8 */
59da381e
JK		 264enum pcie_link_width {
265 PCIE_LNK_WIDTH_RESRV = 0x00,
266 PCIE_LNK_X1 = 0x01,
267 PCIE_LNK_X2 = 0x02,
268 PCIE_LNK_X4 = 0x04,
269 PCIE_LNK_X8 = 0x08,
0aa0f5d1 270 PCIE_LNK_X12 = 0x0c,
59da381e
JK		 271 PCIE_LNK_X16 = 0x10,
272 PCIE_LNK_X32 = 0x20,
0aa0f5d1 273 PCIE_LNK_WIDTH_UNKNOWN = 0xff,
59da381e
JK		 274};
275
e56faff5 276/* See matching string table in pci_speed_string() */
536c8cb4
MW		 277enum pci_bus_speed {
278 PCI_SPEED_33MHz = 0x00,
279 PCI_SPEED_66MHz = 0x01,
280 PCI_SPEED_66MHz_PCIX = 0x02,
281 PCI_SPEED_100MHz_PCIX = 0x03,
282 PCI_SPEED_133MHz_PCIX = 0x04,
283 PCI_SPEED_66MHz_PCIX_ECC = 0x05,
284 PCI_SPEED_100MHz_PCIX_ECC = 0x06,
285 PCI_SPEED_133MHz_PCIX_ECC = 0x07,
286 PCI_SPEED_66MHz_PCIX_266 = 0x09,
287 PCI_SPEED_100MHz_PCIX_266 = 0x0a,
288 PCI_SPEED_133MHz_PCIX_266 = 0x0b,
45b4cdd5
MW		 289 AGP_UNKNOWN = 0x0c,
290 AGP_1X = 0x0d,
291 AGP_2X = 0x0e,
292 AGP_4X = 0x0f,
293 AGP_8X = 0x10,
536c8cb4
MW		 294 PCI_SPEED_66MHz_PCIX_533 = 0x11,
295 PCI_SPEED_100MHz_PCIX_533 = 0x12,
296 PCI_SPEED_133MHz_PCIX_533 = 0x13,
297 PCIE_SPEED_2_5GT = 0x14,
298 PCIE_SPEED_5_0GT = 0x15,
9dfd97fe 299 PCIE_SPEED_8_0GT = 0x16,
1acfb9b7 300 PCIE_SPEED_16_0GT = 0x17,
de76cda2 301 PCIE_SPEED_32_0GT = 0x18,
34191749 302 PCIE_SPEED_64_0GT = 0x19,
536c8cb4
MW		 303 PCI_SPEED_UNKNOWN = 0xff,
304};
305
576c7218
AD		 306enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev);
307enum pcie_link_width pcie_get_width_cap(struct pci_dev *dev);
308
fd00faa3
HK		 309struct pci_vpd {
310 struct mutex lock;
311 unsigned int len;
312 u8 cap;
24a4742f
AW		 313};
314
402723ad 315struct irq_affinity;
7d715a6c 316struct pcie_link_state;
d1b054da 317struct pci_sriov;
52916982 318struct pci_p2pdma;
90655631 319struct rcec_ea;
ee69439c 320
0aa0f5d1 321/* The pci_dev structure describes PCI devices */
1da177e4 322struct pci_dev {
0aa0f5d1
BH		 323 struct list_head bus_list; /* Node in per-bus list */
324 struct pci_bus *bus; /* Bus this device is on */
325 struct pci_bus *subordinate; /* Bus this device bridges to */
1da177e4 326
0aa0f5d1
BH		 327 void *sysdata; /* Hook for sys-specific extension */
328 struct proc_dir_entry *procent; /* Device entry in /proc/bus/pci */
f46753c5 329 struct pci_slot *slot; /* Physical slot this device is in */
1da177e4 330
0aa0f5d1 331 unsigned int devfn; /* Encoded device & function index */
1da177e4
LT		 332 unsigned short vendor;
333 unsigned short device;
334 unsigned short subsystem_vendor;
335 unsigned short subsystem_device;
336 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
b8a3a521 337 u8 revision; /* PCI revision, low byte of class word */
1da177e4 338 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
66b80809
KB		 339#ifdef CONFIG_PCIEAER
340 u16 aer_cap; /* AER capability offset */
db89ccbe 341 struct aer_stats *aer_stats; /* AER stats for this device */
90655631
SK		 342#endif
343#ifdef CONFIG_PCIEPORTBUS
344 struct rcec_ea *rcec_ea; /* RCEC cached endpoint association */
507b460f 345 struct pci_dev *rcec; /* Associated RCEC device */
66b80809 346#endif
69139244 347 u32 devcap; /* PCIe Device Capabilities */
f7625980 348 u8 pcie_cap; /* PCIe capability offset */
e375b561
GS		 349 u8 msi_cap; /* MSI capability offset */
350 u8 msix_cap; /* MSI-X capability offset */
f7625980 351 u8 pcie_mpss:3; /* PCIe Max Payload Size Supported */
0aa0f5d1
BH		 352 u8 rom_base_reg; /* Config register controlling ROM */
353 u8 pin; /* Interrupt pin this device uses */
354 u16 pcie_flags_reg; /* Cached PCIe Capabilities Register */
355 unsigned long *dma_alias_mask;/* Mask of enabled devfn aliases */
1da177e4 356
68da4e0e 357 struct pci_driver *driver; /* Driver bound to this device */
1da177e4
LT		 358 u64 dma_mask; /* Mask of the bits of bus address this
359 device implements. Normally this is
360 0xffffffff. You only need to change
361 this if your device has broken DMA
362 or supports 64-bit transfers. */
363
4d57cdfa
FT		 364 struct device_dma_parameters dma_parms;
365
0aa0f5d1
BH		 366 pci_power_t current_state; /* Current operating state. In ACPI,
367 this is D0-D3, D0 being fully
368 functional, and D3 being off. */
703860ed 369 u8 pm_cap; /* PM capability offset */
849846c4 370 unsigned int imm_ready:1; /* Supports Immediate Readiness */
337001b6
RW		 371 unsigned int pme_support:5; /* Bitmask of states from which PME#
372 can be generated */
379021d5 373 unsigned int pme_poll:1; /* Poll device's PME status bit */
337001b6
RW		 374 unsigned int d1_support:1; /* Low power state D1 is supported */
375 unsigned int d2_support:1; /* Low power state D2 is supported */
448bd857
HY		 376 unsigned int no_d1d2:1; /* D1 and D2 are forbidden */
377 unsigned int no_d3cold:1; /* D3cold is forbidden */
9d26d3a8 378 unsigned int bridge_d3:1; /* Allow D3 for bridge */
448bd857 379 unsigned int d3cold_allowed:1; /* D3cold is allowed by user */
0aa0f5d1
BH		 380 unsigned int mmio_always_on:1; /* Disallow turning off io/mem
381 decoding during BAR sizing */
e80bb09d 382 unsigned int wakeup_prepared:1;
d491f2b7 383 unsigned int skip_bus_pm:1; /* Internal: Skip bus-level PM */
b440bde7 384 unsigned int ignore_hotplug:1; /* Ignore hotplug events */
576243b3
KB		 385 unsigned int hotplug_user_indicators:1; /* SlotCtl indicators
386 controlled exclusively by
387 user sysfs */
4ec73791
SM		 388 unsigned int clear_retrain_link:1; /* Need to clear Retrain Link
389 bit manually */
3789af9a 390 unsigned int d3hot_delay; /* D3hot->D0 transition time in ms */
448bd857 391 unsigned int d3cold_delay; /* D3cold->D0 transition time in ms */
1da177e4 392
17423360 393 u16 l1ss; /* L1SS Capability pointer */
7d715a6c 394#ifdef CONFIG_PCIEASPM
f7625980 395 struct pcie_link_state *link_state; /* ASPM link state */
c46fd358
BH		 396 unsigned int ltr_path:1; /* Latency Tolerance Reporting
397 supported from root to here */
7d715a6c 398#endif
8c09e896 399 unsigned int pasid_no_tlp:1; /* PASID works without TLP Prefix */
7ce3f912 400 unsigned int eetlp_prefix_path:1; /* End-to-End TLP Prefix */
7d715a6c 401
0aa0f5d1
BH		 402 pci_channel_state_t error_state; /* Current connectivity state */
403 struct device dev; /* Generic device interface */
1da177e4 404
0aa0f5d1 405 int cfg_size; /* Size of config space */
1da177e4
LT		 406
407 /*
408 * Instead of touching interrupt line and base address registers
409 * directly, use the values stored here. They might be different!
410 */
411 unsigned int irq;
412 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
27829479 413 struct resource driver_exclusive_resource; /* driver exclusive resource ranges */
1da177e4 414
0aa0f5d1
BH		 415 bool match_driver; /* Skip attaching driver */
416
417 unsigned int transparent:1; /* Subtractive decode bridge */
51c48b31
BH		 418 unsigned int io_window:1; /* Bridge has I/O window */
419 unsigned int pref_window:1; /* Bridge has pref mem window */
420 unsigned int pref_64_window:1; /* Pref mem window is 64-bit */
0aa0f5d1
BH		 421 unsigned int multifunction:1; /* Multi-function device */
422
0aa0f5d1
BH		 423 unsigned int is_busmaster:1; /* Is busmaster */
424 unsigned int no_msi:1; /* May not use MSI */
f6b6aefe 425 unsigned int no_64bit_msi:1; /* May only use 32-bit MSIs */
0aa0f5d1
BH		 426 unsigned int block_cfg_access:1; /* Config space access blocked */
427 unsigned int broken_parity_status:1; /* Generates false positive parity */
428 unsigned int irq_reroute_variant:2; /* Needs IRQ rerouting variant */
f7625980 429 unsigned int msi_enabled:1;
99dc804d 430 unsigned int msix_enabled:1;
0aa0f5d1
BH		 431 unsigned int ari_enabled:1; /* ARI forwarding */
432 unsigned int ats_enabled:1; /* Address Translation Svc */
a4f4fa68
JPB		 433 unsigned int pasid_enabled:1; /* Process Address Space ID */
434 unsigned int pri_enabled:1; /* Page Request Interface */
3f35d2cf
TG		 435 unsigned int is_managed:1; /* Managed via devres */
436 unsigned int is_msi_managed:1; /* MSI release via devres installed */
0aa0f5d1 437 unsigned int needs_freset:1; /* Requires fundamental reset */
aa8c6c93 438 unsigned int state_saved:1;
d1b054da 439 unsigned int is_physfn:1;
dd7cc44d 440 unsigned int is_virtfn:1;
0aa0f5d1 441 unsigned int is_hotplug_bridge:1;
b03799b0 442 unsigned int shpc_managed:1; /* SHPC owned by shpchp */
0aa0f5d1 443 unsigned int is_thunderbolt:1; /* Thunderbolt controller */
617654aa
MW		 444 /*
445 * Devices marked being untrusted are the ones that can potentially
446 * execute DMA attacks and similar. They are typically connected
447 * through external ports such as Thunderbolt but not limited to
448 * that. When an IOMMU is enabled they should be getting full
449 * mappings to make sure they cannot access arbitrary memory.
450 */
451 unsigned int untrusted:1;
99b50be9
RJ		 452 /*
453 * Info from the platform, e.g., ACPI or device tree, may mark a
454 * device as "external-facing". An external-facing device is
455 * itself internal but devices downstream from it are external.
456 */
457 unsigned int external_facing:1;
0aa0f5d1
BH		 458 unsigned int broken_intx_masking:1; /* INTx masking can't be used */
459 unsigned int io_window_1k:1; /* Intel bridge 1K I/O windows */
cffe0a2b 460 unsigned int irq_managed:1;
0aa0f5d1
BH		 461 unsigned int non_compliant_bars:1; /* Broken BARs; ignore them */
462 unsigned int is_probed:1; /* Device probing in progress */
f0157160 463 unsigned int link_active_reporting:1;/* Device capable of reporting link active */
aff68a5a 464 unsigned int no_vf_scan:1; /* Don't scan for VFs after IOV enablement */
12856e7a 465 unsigned int no_command_memory:1; /* No PCI_COMMAND_MEMORY */
500b55b0 466 unsigned int rom_bar_overlap:1; /* ROM BAR disable broken */
091f9f7f 467 unsigned int rom_attr_enabled:1; /* Display of ROM attribute enabled? */
ba698ad4 468 pci_dev_flags_t dev_flags;
bae94d02 469 atomic_t enable_cnt; /* pci_enable_device has been called */
4602b88d 470
5e70d0ac 471 spinlock_t pcie_cap_lock; /* Protects RMW ops in capability accessors */
0aa0f5d1 472 u32 saved_config_space[16]; /* Config space saved at suspend time */
41017f0c 473 struct hlist_head saved_cap_space;
1da177e4 474 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
45aec1ae 475 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
9bb04a0c 476
d22b3621
BH		 477#ifdef CONFIG_HOTPLUG_PCI_PCIE
478 unsigned int broken_cmd_compl:1; /* No compl for some cmds */
479#endif
9bb04a0c 480#ifdef CONFIG_PCIE_PTM
a47126ec 481 u16 ptm_cap; /* PTM Capability */
9bb04a0c
JY		 482 unsigned int ptm_root:1;
483 unsigned int ptm_enabled:1;
8b2ec318 484 u8 ptm_granularity;
9bb04a0c 485#endif
ded86d8d 486#ifdef CONFIG_PCI_MSI
85aa607e 487 void __iomem *msix_base;
cd119b09 488 raw_spinlock_t msi_lock;
ded86d8d 489#endif
fd00faa3 490 struct pci_vpd vpd;
be06c1b4
BH		 491#ifdef CONFIG_PCIE_DPC
492 u16 dpc_cap;
493 unsigned int dpc_rp_extensions:1;
494 u8 dpc_rp_log_size;
495#endif
466b3ddf 496#ifdef CONFIG_PCI_ATS
dd7cc44d 497 union {
0aa0f5d1
BH		 498 struct pci_sriov *sriov; /* PF: SR-IOV info */
499 struct pci_dev *physfn; /* VF: related PF */
dd7cc44d 500 };
67930995
BH		 501 u16 ats_cap; /* ATS Capability offset */
502 u8 ats_stu; /* ATS Smallest Translation Unit */
4ebeb1ec
CT		 503#endif
504#ifdef CONFIG_PCI_PRI
c065190b 505 u16 pri_cap; /* PRI Capability offset */
4ebeb1ec 506 u32 pri_reqs_alloc; /* Number of PRI requests allocated */
e5adf79a 507 unsigned int pasid_required:1; /* PRG Response PASID Required */
4ebeb1ec
CT		 508#endif
509#ifdef CONFIG_PCI_PASID
751035b8 510 u16 pasid_cap; /* PASID Capability offset */
4ebeb1ec 511 u16 pasid_features;
52916982
LG		 512#endif
513#ifdef CONFIG_PCI_P2PDMA
ae21f835 514 struct pci_p2pdma __rcu *p2pdma;
ac048403
LW		 515#endif
516#ifdef CONFIG_PCI_DOE
517 struct xarray doe_mbs; /* Data Object Exchange mailboxes */
d1b054da 518#endif
52fbf5bd 519 u16 acs_cap; /* ACS Capability offset */
0aa0f5d1
BH		 520 phys_addr_t rom; /* Physical address if not from BAR */
521 size_t romlen; /* Length if not from BAR */
23d99baf
KK		 522 /*
523 * Driver name to force a match. Do not set directly, because core
524 * frees it. Use driver_set_override() to set or clear it.
525 */
526 const char *driver_override;
89ee9f76 527
0aa0f5d1 528 unsigned long priv_flags; /* Private flags for the PCI driver */
e20afa06
AN		 529
530 /* These methods index pci_reset_fn_methods[] */
531 u8 reset_methods[PCI_NUM_RESET_METHODS]; /* In priority order */
1da177e4
LT		 532};
533
dda56549
Y		 534static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
535{
536#ifdef CONFIG_PCI_IOV
537 if (dev->is_virtfn)
538 dev = dev->physfn;
539#endif
dda56549
Y		 540 return dev;
541}
542
3c6e6ae7 543struct pci_dev *pci_alloc_dev(struct pci_bus *bus);
65891215 544
1da177e4
LT		 545#define to_pci_dev(n) container_of(n, struct pci_dev, dev)
546#define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
547
a7369f1f
LV		 548static inline int pci_channel_offline(struct pci_dev *pdev)
549{
550 return (pdev->error_state != pci_channel_io_normal);
551}
552
15d82ca2
BF		 553/*
554 * Currently in ACPI spec, for each PCI host bridge, PCI Segment
555 * Group number is limited to a 16-bit value, therefore (int)-1 is
556 * not a valid PCI domain number, and can be used as a sentinel
557 * value indicating ->domain_nr is not set by the driver (and
558 * CONFIG_PCI_DOMAINS_GENERIC=y archs will set it with
559 * pci_bus_find_domain_nr()).
560 */
561#define PCI_DOMAIN_NR_NOT_SET (-1)
562
5a21d70d 563struct pci_host_bridge {
0aa0f5d1
BH		 564 struct device dev;
565 struct pci_bus *bus; /* Root bus */
566 struct pci_ops *ops;
07e29295 567 struct pci_ops *child_ops;
0aa0f5d1
BH		 568 void *sysdata;
569 int busnr;
15d82ca2 570 int domain_nr;
14d76b68 571 struct list_head windows; /* resource_entry */
e80a91ad 572 struct list_head dma_ranges; /* dma ranges resource list */
0aa0f5d1 573 u8 (*swizzle_irq)(struct pci_dev *, u8 *); /* Platform IRQ swizzler */
3aa8a41e 574 int (*map_irq)(const struct pci_dev *, u8, u8);
4fa2649a 575 void (*release_fn)(struct pci_host_bridge *);
0aa0f5d1 576 void *release_data;
0aa0f5d1
BH		 577 unsigned int ignore_reset_delay:1; /* For entire hierarchy */
578 unsigned int no_ext_tags:1; /* No Extended Tags */
8b3517f8 579 unsigned int no_inc_mrrs:1; /* No Increase MRRS */
02bfeb48 580 unsigned int native_aer:1; /* OS may use PCIe AER */
9310f0dc 581 unsigned int native_pcie_hotplug:1; /* OS may use PCIe hotplug */
1df81a6d 582 unsigned int native_shpc_hotplug:1; /* OS may use SHPC hotplug */
02bfeb48 583 unsigned int native_pme:1; /* OS may use PCIe PME */
af8bb9f8 584 unsigned int native_ltr:1; /* OS may use PCIe LTR */
ac1c8e35 585 unsigned int native_dpc:1; /* OS may use PCIe DPC */
589c3357 586 unsigned int native_cxl_error:1; /* OS may use CXL RAS/Events */
a78cf965 587 unsigned int preserve_config:1; /* Preserve FW resource setup */
2c8d5a2d 588 unsigned int size_windows:1; /* Enable root bus sizing */
94e89b14 589 unsigned int msi_domain:1; /* Bridge wants MSI domain */
a78cf965 590
7c7a0e94
GP		 591 /* Resource alignment requirements */
592 resource_size_t (*align_resource)(struct pci_dev *dev,
593 const struct resource *res,
594 resource_size_t start,
595 resource_size_t size,
596 resource_size_t align);
914a1951 597 unsigned long private[] ____cacheline_aligned;
5a21d70d 598};
41017f0c 599
7b543663 600#define to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev)
7c7a0e94 601
59094065
TR		 602static inline void *pci_host_bridge_priv(struct pci_host_bridge *bridge)
603{
604 return (void *)bridge->private;
605}
606
607static inline struct pci_host_bridge *pci_host_bridge_from_priv(void *priv)
608{
609 return container_of(priv, struct pci_host_bridge, private);
610}
611
a52d1443 612struct pci_host_bridge *pci_alloc_host_bridge(size_t priv);
5c3f18cc
LP		 613struct pci_host_bridge *devm_pci_alloc_host_bridge(struct device *dev,
614 size_t priv);
dff79b91 615void pci_free_host_bridge(struct pci_host_bridge *bridge);
7c7a0e94
GP		 616struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus);
617
4fa2649a 618void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
0aa0f5d1
BH		 619 void (*release_fn)(struct pci_host_bridge *),
620 void *release_data);
7b543663 621
6c0cc950
RW		 622int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge);
623
2fe2abf8
BH		 624/*
625 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
626 * to P2P or CardBus bridge windows) go in a table. Additional ones (for
627 * buses below host bridges or subtractive decode bridges) go in the list.
628 * Use pci_bus_for_each_resource() to iterate through all the resources.
629 */
630
631/*
632 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly
633 * and there's no way to program the bridge with the details of the window.
634 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive-
635 * decode bit set, because they are explicit and can be programmed with _SRS.
636 */
637#define PCI_SUBTRACTIVE_DECODE 0x1
638
639struct pci_bus_resource {
0aa0f5d1
BH		 640 struct list_head list;
641 struct resource *res;
642 unsigned int flags;
2fe2abf8 643};
4352dfd5
GKH		 644
645#define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
1da177e4
LT		 646
647struct pci_bus {
0aa0f5d1
BH		 648 struct list_head node; /* Node in list of buses */
649 struct pci_bus *parent; /* Parent bus this bridge is on */
650 struct list_head children; /* List of child buses */
651 struct list_head devices; /* List of devices on this bus */
652 struct pci_dev *self; /* Bridge device as seen by parent */
653 struct list_head slots; /* List of slots on this bus;
67546762 654 protected by pci_slot_mutex */
2fe2abf8 655 struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
0aa0f5d1
BH		 656 struct list_head resources; /* Address space routed to this bus */
657 struct resource busn_res; /* Bus numbers routed to this bus */
1da177e4 658
0aa0f5d1 659 struct pci_ops *ops; /* Configuration access functions */
0aa0f5d1
BH		 660 void *sysdata; /* Hook for sys-specific extension */
661 struct proc_dir_entry *procdir; /* Directory entry in /proc/bus/pci */
1da177e4 662
0aa0f5d1
BH		 663 unsigned char number; /* Bus number */
664 unsigned char primary; /* Number of primary bridge */
3749c51a
MW		 665 unsigned char max_bus_speed; /* enum pci_bus_speed */
666 unsigned char cur_bus_speed; /* enum pci_bus_speed */
670ba0c8
CM		 667#ifdef CONFIG_PCI_DOMAINS_GENERIC
668 int domain_nr;
669#endif
1da177e4
LT		 670
671 char name[48];
672
0aa0f5d1
BH		 673 unsigned short bridge_ctl; /* Manage NO_ISA/FBB/et al behaviors */
674 pci_bus_flags_t bus_flags; /* Inherited by child buses */
1da177e4 675 struct device *bridge;
fd7d1ced 676 struct device dev;
0aa0f5d1
BH		 677 struct bin_attribute *legacy_io; /* Legacy I/O for this bus */
678 struct bin_attribute *legacy_mem; /* Legacy mem */
cc74d96f 679 unsigned int is_added:1;
92c45b63 680 unsigned int unsafe_warn:1; /* warned about RW1C config write */
1da177e4
LT		 681};
682
fd7d1ced 683#define to_pci_bus(n) container_of(n, struct pci_bus, dev)
1da177e4 684
4e544bac
HK		 685static inline u16 pci_dev_id(struct pci_dev *dev)
686{
687 return PCI_DEVID(dev->bus->number, dev->devfn);
688}
689
79af72d7 690/*
f7625980 691 * Returns true if the PCI bus is root (behind host-PCI bridge),
79af72d7 692 * false otherwise
77a0dfcd
BH		 693 *
694 * Some code assumes that "bus->self == NULL" means that bus is a root bus.
695 * This is incorrect because "virtual" buses added for SR-IOV (via
696 * virtfn_add_bus()) have "bus->self == NULL" but are not root buses.
79af72d7
KK		 697 */
698static inline bool pci_is_root_bus(struct pci_bus *pbus)
699{
700 return !(pbus->parent);
701}
702
1c86438c
YW		 703/**
704 * pci_is_bridge - check if the PCI device is a bridge
705 * @dev: PCI device
706 *
707 * Return true if the PCI device is bridge whether it has subordinate
708 * or not.
709 */
710static inline bool pci_is_bridge(struct pci_dev *dev)
711{
712 return dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
713 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS;
714}
715
7e845ecb
SJ		 716/**
717 * pci_is_vga - check if the PCI device is a VGA device
2db6b72c 718 * @pdev: PCI device
7e845ecb
SJ		 719 *
720 * The PCI Code and ID Assignment spec, r1.15, secs 1.4 and 1.1, define
721 * VGA Base Class and Sub-Classes:
722 *
723 * 03 00 PCI_CLASS_DISPLAY_VGA VGA-compatible or 8514-compatible
724 * 00 01 PCI_CLASS_NOT_DEFINED_VGA VGA-compatible (before Class Code)
725 *
726 * Return true if the PCI device is a VGA device and uses the legacy VGA
727 * resources ([mem 0xa0000-0xbffff], [io 0x3b0-0x3bb], [io 0x3c0-0x3df] and
728 * aliases).
729 */
730static inline bool pci_is_vga(struct pci_dev *pdev)
731{
732 if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA)
733 return true;
734
735 if ((pdev->class >> 8) == PCI_CLASS_NOT_DEFINED_VGA)
736 return true;
737
738 return false;
739}
740
24a0c654
AS		 741#define for_each_pci_bridge(dev, bus) \
742 list_for_each_entry(dev, &bus->devices, bus_list) \
743 if (!pci_is_bridge(dev)) {} else
744
c6bde215
BH		 745static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev)
746{
747 dev = pci_physfn(dev);
748 if (pci_is_root_bus(dev->bus))
749 return NULL;
750
751 return dev->bus->self;
752}
753
16cf0ebc
RW		 754#ifdef CONFIG_PCI_MSI
755static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
756{
757 return pci_dev->msi_enabled || pci_dev->msix_enabled;
758}
759#else
760static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
761#endif
762
0aa0f5d1 763/* Error values that may be returned by PCI functions */
1da177e4
LT		 764#define PCIBIOS_SUCCESSFUL 0x00
765#define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
766#define PCIBIOS_BAD_VENDOR_ID 0x83
767#define PCIBIOS_DEVICE_NOT_FOUND 0x86
768#define PCIBIOS_BAD_REGISTER_NUMBER 0x87
769#define PCIBIOS_SET_FAILED 0x88
770#define PCIBIOS_BUFFER_TOO_SMALL 0x89
771
0aa0f5d1 772/* Translate above to generic errno for passing back through non-PCI code */
a6961651
AW		 773static inline int pcibios_err_to_errno(int err)
774{
775 if (err <= PCIBIOS_SUCCESSFUL)
776 return err; /* Assume already errno */
777
778 switch (err) {
779 case PCIBIOS_FUNC_NOT_SUPPORTED:
780 return -ENOENT;
781 case PCIBIOS_BAD_VENDOR_ID:
d97ffe23 782 return -ENOTTY;
a6961651
AW		 783 case PCIBIOS_DEVICE_NOT_FOUND:
784 return -ENODEV;
785 case PCIBIOS_BAD_REGISTER_NUMBER:
786 return -EFAULT;
787 case PCIBIOS_SET_FAILED:
788 return -EIO;
789 case PCIBIOS_BUFFER_TOO_SMALL:
790 return -ENOSPC;
791 }
792
d97ffe23 793 return -ERANGE;
a6961651
AW		 794}
795
1da177e4
LT		 796/* Low-level architecture-dependent routines */
797
798struct pci_ops {
057bd2e0
TR		 799 int (*add_bus)(struct pci_bus *bus);
800 void (*remove_bus)(struct pci_bus *bus);
1f94a94f 801 void __iomem *(*map_bus)(struct pci_bus *bus, unsigned int devfn, int where);
1da177e4
LT		 802 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
803 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
804};
805
b6ce068a
MW		 806/*
807 * ACPI needs to be able to access PCI config space before we've done a
808 * PCI bus scan and created pci_bus structures.
809 */
f39d5b72
BH		 810int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
811 int reg, int len, u32 *val);
812int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
813 int reg, int len, u32 val);
1da177e4 814
8e639079 815#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
3a9ad0b4
YL		 816typedef u64 pci_bus_addr_t;
817#else
818typedef u32 pci_bus_addr_t;
819#endif
820
1da177e4 821struct pci_bus_region {
0aa0f5d1
BH		 822 pci_bus_addr_t start;
823 pci_bus_addr_t end;
1da177e4
LT		 824};
825
826struct pci_dynids {
0aa0f5d1
BH		 827 spinlock_t lock; /* Protects list, index */
828 struct list_head list; /* For IDs added at runtime */
1da177e4
LT		 829};
830
f7625980
BH		 831
832/*
833 * PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
834 * a set of callbacks in struct pci_error_handlers, that device driver
835 * will be notified of PCI bus errors, and will be driven to recovery
836 * when an error occurs.
392a1ce7 837 */
838
839typedef unsigned int __bitwise pci_ers_result_t;
840
841enum pci_ers_result {
0aa0f5d1 842 /* No result/none/not supported in device driver */
392a1ce7 843 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
844
845 /* Device driver can recover without slot reset */
846 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
847
0aa0f5d1 848 /* Device driver wants slot to be reset */
392a1ce7 849 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
850
851 /* Device has completely failed, is unrecoverable */
852 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
853
854 /* Device driver is fully recovered and operational */
855 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
918b4053
VMP		 856
857 /* No AER capabilities registered for the driver */
858 PCI_ERS_RESULT_NO_AER_DRIVER = (__force pci_ers_result_t) 6,
392a1ce7 859};
860
861/* PCI bus error event callbacks */
05cca6e5 862struct pci_error_handlers {
392a1ce7 863 /* PCI bus error detected on this device */
864 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
16d79cd4 865 pci_channel_state_t error);
392a1ce7 866
867 /* MMIO has been re-enabled, but not DMA */
868 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
869
392a1ce7 870 /* PCI slot has been reset */
871 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
872
3ebe7f9f 873 /* PCI function reset prepare or completed */
775755ed
CH		 874 void (*reset_prepare)(struct pci_dev *dev);
875 void (*reset_done)(struct pci_dev *dev);
3ebe7f9f 876
392a1ce7 877 /* Device driver may resume normal operations */
878 void (*resume)(struct pci_dev *dev);
361187e0
DJ		 879
880 /* Allow device driver to record more details of a correctable error */
881 void (*cor_error_detected)(struct pci_dev *dev);
392a1ce7 882};
883
392a1ce7 884
1da177e4 885struct module;
229b4e07
CD		 886
887/**
888 * struct pci_driver - PCI driver structure
229b4e07
CD		 889 * @name: Driver name.
890 * @id_table: Pointer to table of device IDs the driver is
891 * interested in. Most drivers should export this
892 * table using MODULE_DEVICE_TABLE(pci,...).
893 * @probe: This probing function gets called (during execution
894 * of pci_register_driver() for already existing
895 * devices or later if a new device gets inserted) for
896 * all PCI devices which match the ID table and are not
897 * "owned" by the other drivers yet. This function gets
898 * passed a "struct pci_dev \*" for each device whose
899 * entry in the ID table matches the device. The probe
900 * function returns zero when the driver chooses to
901 * take "ownership" of the device or an error code
902 * (negative number) otherwise.
903 * The probe function always gets called from process
904 * context, so it can sleep.
905 * @remove: The remove() function gets called whenever a device
906 * being handled by this driver is removed (either during
907 * deregistration of the driver or when it's manually
908 * pulled out of a hot-pluggable slot).
909 * The remove function always gets called from process
910 * context, so it can sleep.
911 * @suspend: Put device into low power state.
229b4e07 912 * @resume: Wake device from low power state.
151f4e2b 913 * (Please see Documentation/power/pci.rst for descriptions
229b4e07
CD		 914 * of PCI Power Management and the related functions.)
915 * @shutdown: Hook into reboot_notifier_list (kernel/sys.c).
916 * Intended to stop any idling DMA operations.
917 * Useful for enabling wake-on-lan (NIC) or changing
918 * the power state of a device before reboot.
919 * e.g. drivers/net/e100.c.
920 * @sriov_configure: Optional driver callback to allow configuration of
921 * number of VFs to enable via sysfs "sriov_numvfs" file.
c3d5c2d9
LR		 922 * @sriov_set_msix_vec_count: PF Driver callback to change number of MSI-X
923 * vectors on a VF. Triggered via sysfs "sriov_vf_msix_count".
924 * This will change MSI-X Table Size in the VF Message Control
925 * registers.
926 * @sriov_get_vf_total_msix: PF driver callback to get the total number of
927 * MSI-X vectors available for distribution to the VFs.
229b4e07
CD		 928 * @err_handler: See Documentation/PCI/pci-error-recovery.rst
929 * @groups: Sysfs attribute groups.
ded13b9c
AG		 930 * @dev_groups: Attributes attached to the device that will be
931 * created once it is bound to the driver.
229b4e07
CD		 932 * @driver: Driver model structure.
933 * @dynids: List of dynamically added device IDs.
512881ea
LB		 934 * @driver_managed_dma: Device driver doesn't use kernel DMA API for DMA.
935 * For most device drivers, no need to care about this flag
936 * as long as all DMAs are handled through the kernel DMA API.
937 * For some special ones, for example VFIO drivers, they know
938 * how to manage the DMA themselves and set this flag so that
939 * the IOMMU layer will allow them to setup and manage their
940 * own I/O address space.
229b4e07 941 */
1da177e4 942struct pci_driver {
0aa0f5d1
BH		 943 const char *name;
944 const struct pci_device_id *id_table; /* Must be non-NULL for probe to be called */
945 int (*probe)(struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
946 void (*remove)(struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
947 int (*suspend)(struct pci_dev *dev, pm_message_t state); /* Device suspended */
7cb30264
BY		 948 int (*resume)(struct pci_dev *dev); /* Device woken up */
949 void (*shutdown)(struct pci_dev *dev);
950 int (*sriov_configure)(struct pci_dev *dev, int num_vfs); /* On PF */
c3d5c2d9
LR		 951 int (*sriov_set_msix_vec_count)(struct pci_dev *vf, int msix_vec_count); /* On PF */
952 u32 (*sriov_get_vf_total_msix)(struct pci_dev *pf);
49453028 953 const struct pci_error_handlers *err_handler;
92d50fc1 954 const struct attribute_group **groups;
ded13b9c 955 const struct attribute_group **dev_groups;
1da177e4 956 struct device_driver driver;
0aa0f5d1 957 struct pci_dynids dynids;
512881ea 958 bool driver_managed_dma;
1da177e4
LT		 959};
960
8e9028b3
BH		 961static inline struct pci_driver *to_pci_driver(struct device_driver *drv)
962{
963 return drv ? container_of(drv, struct pci_driver, driver) : NULL;
964}
1da177e4
LT		 965
966/**
0aa0f5d1 967 * PCI_DEVICE - macro used to describe a specific PCI device
1da177e4
LT		 968 * @vend: the 16 bit PCI Vendor ID
969 * @dev: the 16 bit PCI Device ID
970 *
971 * This macro is used to create a struct pci_device_id that matches a
972 * specific device. The subvendor and subdevice fields will be set to
973 * PCI_ANY_ID.
974 */
975#define PCI_DEVICE(vend,dev) \
976 .vendor = (vend), .device = (dev), \
977 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
978
343b7258
MG		 979/**
980 * PCI_DEVICE_DRIVER_OVERRIDE - macro used to describe a PCI device with
981 * override_only flags.
982 * @vend: the 16 bit PCI Vendor ID
983 * @dev: the 16 bit PCI Device ID
984 * @driver_override: the 32 bit PCI Device override_only
985 *
986 * This macro is used to create a struct pci_device_id that matches only a
987 * driver_override device. The subvendor and subdevice fields will be set to
988 * PCI_ANY_ID.
989 */
990#define PCI_DEVICE_DRIVER_OVERRIDE(vend, dev, driver_override) \
991 .vendor = (vend), .device = (dev), .subvendor = PCI_ANY_ID, \
992 .subdevice = PCI_ANY_ID, .override_only = (driver_override)
993
cc6711b0
MG		 994/**
995 * PCI_DRIVER_OVERRIDE_DEVICE_VFIO - macro used to describe a VFIO
996 * "driver_override" PCI device.
997 * @vend: the 16 bit PCI Vendor ID
998 * @dev: the 16 bit PCI Device ID
999 *
1000 * This macro is used to create a struct pci_device_id that matches a
1001 * specific device. The subvendor and subdevice fields will be set to
1002 * PCI_ANY_ID and the driver_override will be set to
1003 * PCI_ID_F_VFIO_DRIVER_OVERRIDE.
1004 */
1005#define PCI_DRIVER_OVERRIDE_DEVICE_VFIO(vend, dev) \
1006 PCI_DEVICE_DRIVER_OVERRIDE(vend, dev, PCI_ID_F_VFIO_DRIVER_OVERRIDE)
1007
3d567e0e 1008/**
0aa0f5d1 1009 * PCI_DEVICE_SUB - macro used to describe a specific PCI device with subsystem
3d567e0e
NNS		 1010 * @vend: the 16 bit PCI Vendor ID
1011 * @dev: the 16 bit PCI Device ID
1012 * @subvend: the 16 bit PCI Subvendor ID
1013 * @subdev: the 16 bit PCI Subdevice ID
1014 *
1015 * This macro is used to create a struct pci_device_id that matches a
1016 * specific device with subsystem information.
1017 */
1018#define PCI_DEVICE_SUB(vend, dev, subvend, subdev) \
1019 .vendor = (vend), .device = (dev), \
1020 .subvendor = (subvend), .subdevice = (subdev)
1021
1da177e4 1022/**
0aa0f5d1 1023 * PCI_DEVICE_CLASS - macro used to describe a specific PCI device class
1da177e4
LT		 1024 * @dev_class: the class, subclass, prog-if triple for this device
1025 * @dev_class_mask: the class mask for this device
1026 *
1027 * This macro is used to create a struct pci_device_id that matches a
4352dfd5 1028 * specific PCI class. The vendor, device, subvendor, and subdevice
1da177e4
LT		 1029 * fields will be set to PCI_ANY_ID.
1030 */
1031#define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
1032 .class = (dev_class), .class_mask = (dev_class_mask), \
1033 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
1034 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
1035
1597cacb 1036/**
0aa0f5d1 1037 * PCI_VDEVICE - macro used to describe a specific PCI device in short form
c1309040
MR		 1038 * @vend: the vendor name
1039 * @dev: the 16 bit PCI Device ID
1597cacb
AC		 1040 *
1041 * This macro is used to create a struct pci_device_id that matches a
1042 * specific PCI device. The subvendor, and subdevice fields will be set
1043 * to PCI_ANY_ID. The macro allows the next field to follow as the device
1044 * private data.
1045 */
c1309040
MR		 1046#define PCI_VDEVICE(vend, dev) \
1047 .vendor = PCI_VENDOR_ID_##vend, .device = (dev), \
1048 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0
1597cacb 1049
b72ae8ca
AS		 1050/**
1051 * PCI_DEVICE_DATA - macro used to describe a specific PCI device in very short form
1052 * @vend: the vendor name (without PCI_VENDOR_ID_ prefix)
1053 * @dev: the device name (without PCI_DEVICE_ID_<vend>_ prefix)
1054 * @data: the driver data to be filled
1055 *
1056 * This macro is used to create a struct pci_device_id that matches a
1057 * specific PCI device. The subvendor, and subdevice fields will be set
1058 * to PCI_ANY_ID.
1059 */
1060#define PCI_DEVICE_DATA(vend, dev, data) \
1061 .vendor = PCI_VENDOR_ID_##vend, .device = PCI_DEVICE_ID_##vend##_##dev, \
1062 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0, \
1063 .driver_data = (kernel_ulong_t)(data)
1064
5bbe029f 1065enum {
0aa0f5d1
BH		 1066 PCI_REASSIGN_ALL_RSRC = 0x00000001, /* Ignore firmware setup */
1067 PCI_REASSIGN_ALL_BUS = 0x00000002, /* Reassign all bus numbers */
1068 PCI_PROBE_ONLY = 0x00000004, /* Use existing setup */
1069 PCI_CAN_SKIP_ISA_ALIGN = 0x00000008, /* Don't do ISA alignment */
1070 PCI_ENABLE_PROC_DOMAINS = 0x00000010, /* Enable domains in /proc */
5bbe029f 1071 PCI_COMPAT_DOMAIN_0 = 0x00000020, /* ... except domain 0 */
0aa0f5d1 1072 PCI_SCAN_ALL_PCIE_DEVS = 0x00000040, /* Scan all, not just dev 0 */
5bbe029f
BH		 1073};
1074
58ff9c5a 1075#define PCI_IRQ_INTX (1 << 0) /* Allow INTx interrupts */
0d8006dd
HX		 1076#define PCI_IRQ_MSI (1 << 1) /* Allow MSI interrupts */
1077#define PCI_IRQ_MSIX (1 << 2) /* Allow MSI-X interrupts */
1078#define PCI_IRQ_AFFINITY (1 << 3) /* Auto-assign affinity */
1079
0aa0f5d1 1080/* These external functions are only available when PCI support is enabled */
1da177e4
LT		 1081#ifdef CONFIG_PCI
1082
5bbe029f
BH		 1083extern unsigned int pci_flags;
1084
1085static inline void pci_set_flags(int flags) { pci_flags = flags; }
1086static inline void pci_add_flags(int flags) { pci_flags |= flags; }
1087static inline void pci_clear_flags(int flags) { pci_flags &= ~flags; }
1088static inline int pci_has_flag(int flag) { return pci_flags & flag; }
1089
a58674ff 1090void pcie_bus_configure_settings(struct pci_bus *bus);
b03e7495
JM		 1091
1092enum pcie_bus_config_types {
0aa0f5d1
BH		 1093 PCIE_BUS_TUNE_OFF, /* Don't touch MPS at all */
1094 PCIE_BUS_DEFAULT, /* Ensure MPS matches upstream bridge */
1095 PCIE_BUS_SAFE, /* Use largest MPS boot-time devices support */
1096 PCIE_BUS_PERFORMANCE, /* Use MPS and MRRS for best performance */
1097 PCIE_BUS_PEER2PEER, /* Set MPS = 128 for all devices */
b03e7495
JM		 1098};
1099
1100extern enum pcie_bus_config_types pcie_bus_config;
1101
1da177e4
LT		 1102extern struct bus_type pci_bus_type;
1103
f7625980
BH		 1104/* Do NOT directly access these two variables, unless you are arch-specific PCI
1105 * code, or PCI core code. */
0aa0f5d1 1106extern struct list_head pci_root_buses; /* List of all known PCI buses */
f7625980 1107/* Some device drivers need know if PCI is initiated */
f39d5b72 1108int no_pci_devices(void);
1da177e4 1109
3c449ed0 1110void pcibios_resource_survey_bus(struct pci_bus *bus);
7b77061f 1111void pcibios_bus_add_device(struct pci_dev *pdev);
10a95747
JL		 1112void pcibios_add_bus(struct pci_bus *bus);
1113void pcibios_remove_bus(struct pci_bus *bus);
1da177e4 1114void pcibios_fixup_bus(struct pci_bus *);
4a7fb636 1115int __must_check pcibios_enable_device(struct pci_dev *, int mask);
f7625980 1116/* Architecture-specific versions may override this (weak) */
05cca6e5 1117char *pcibios_setup(char *str);
1da177e4
LT		 1118
1119/* Used only when drivers/pci/setup.c is used */
3b7a17fc 1120resource_size_t pcibios_align_resource(void *, const struct resource *,
b26b2d49 1121 resource_size_t,
e31dd6e4 1122 resource_size_t);
1da177e4 1123
d1bbf38a 1124/* Weak but can be overridden by arch */
2d1c8618
BH		 1125void pci_fixup_cardbus(struct pci_bus *);
1126
1da177e4
LT		 1127/* Generic PCI functions used internally */
1128
fc279850 1129void pcibios_resource_to_bus(struct pci_bus *bus, struct pci_bus_region *region,
36a66cd6 1130 struct resource *res);
fc279850 1131void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
36a66cd6 1132 struct pci_bus_region *region);
d1fd4fb6 1133void pcibios_scan_specific_bus(int busn);
f39d5b72 1134struct pci_bus *pci_find_bus(int domain, int busnr);
c48f1670 1135void pci_bus_add_devices(const struct pci_bus *bus);
de4b2f76 1136struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
166c6370
BH		 1137struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
1138 struct pci_ops *ops, void *sysdata,
1139 struct list_head *resources);
49b8e3f3 1140int pci_host_probe(struct pci_host_bridge *bridge);
98a35831
YL		 1141int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
1142int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax);
1143void pci_bus_release_busn_res(struct pci_bus *b);
15856ad5 1144struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
0aa0f5d1
BH		 1145 struct pci_ops *ops, void *sysdata,
1146 struct list_head *resources);
1228c4b6 1147int pci_scan_root_bus_bridge(struct pci_host_bridge *bridge);
05cca6e5
GKH		 1148struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
1149 int busnr);
f46753c5 1150struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
828f3768
AC		 1151 const char *name,
1152 struct hotplug_slot *hotplug);
f46753c5 1153void pci_destroy_slot(struct pci_slot *slot);
017ffe64
YW		 1154#ifdef CONFIG_SYSFS
1155void pci_dev_assign_slot(struct pci_dev *dev);
1156#else
1157static inline void pci_dev_assign_slot(struct pci_dev *dev) { }
1158#endif
1da177e4 1159int pci_scan_slot(struct pci_bus *bus, int devfn);
05cca6e5 1160struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
cdb9b9f7 1161void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
1da177e4 1162unsigned int pci_scan_child_bus(struct pci_bus *bus);
c893d133 1163void pci_bus_add_device(struct pci_dev *dev);
1da177e4 1164void pci_read_bridge_bases(struct pci_bus *child);
05cca6e5
GKH		 1165struct resource *pci_find_parent_resource(const struct pci_dev *dev,
1166 struct resource *res);
3df425f3 1167u8 pci_swizzle_interrupt_pin(const struct pci_dev *dev, u8 pin);
1da177e4 1168int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
68feac87 1169u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
f39d5b72
BH		 1170struct pci_dev *pci_dev_get(struct pci_dev *dev);
1171void pci_dev_put(struct pci_dev *dev);
ced085ef 1172DEFINE_FREE(pci_dev_put, struct pci_dev *, if (_T) pci_dev_put(_T))
f39d5b72
BH		 1173void pci_remove_bus(struct pci_bus *b);
1174void pci_stop_and_remove_bus_device(struct pci_dev *dev);
9d16947b 1175void pci_stop_and_remove_bus_device_locked(struct pci_dev *dev);
cdfcc572
YL		 1176void pci_stop_root_bus(struct pci_bus *bus);
1177void pci_remove_root_bus(struct pci_bus *bus);
b3743fa4 1178void pci_setup_cardbus(struct pci_bus *bus);
d366d28c 1179void pcibios_setup_bridge(struct pci_bus *bus, unsigned long type);
f39d5b72 1180void pci_sort_breadthfirst(void);
fb8a0d9d
WM		 1181#define dev_is_pci(d) ((d)->bus == &pci_bus_type)
1182#define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false))
1da177e4
LT		 1183
1184/* Generic PCI functions exported to card drivers */
1185
f646c2a0
PM		 1186u8 pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
1187u8 pci_find_capability(struct pci_dev *dev, int cap);
1188u8 pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
1189u8 pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
1190u8 pci_find_next_ht_capability(struct pci_dev *dev, u8 pos, int ht_cap);
ee8b1c47
BH		 1191u16 pci_find_ext_capability(struct pci_dev *dev, int cap);
1192u16 pci_find_next_ext_capability(struct pci_dev *dev, u16 pos, int cap);
29f3eb64 1193struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
c124fd9a 1194u16 pci_find_vsec_capability(struct pci_dev *dev, u16 vendor, int cap);
ee122037 1195u16 pci_find_dvsec_capability(struct pci_dev *dev, u16 vendor, u16 dvsec);
1da177e4 1196
70c0923b
JK		 1197u64 pci_get_dsn(struct pci_dev *dev);
1198
d42552c3 1199struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
0aa0f5d1 1200 struct pci_dev *from);
05cca6e5 1201struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
0aa0f5d1
BH		 1202 unsigned int ss_vendor, unsigned int ss_device,
1203 struct pci_dev *from);
05cca6e5 1204struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
3c299dc2
AP		 1205struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
1206 unsigned int devfn);
05cca6e5 1207struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
d427da23
SJ		 1208struct pci_dev *pci_get_base_class(unsigned int class, struct pci_dev *from);
1209
1da177e4
LT		 1210int pci_dev_present(const struct pci_device_id *ids);
1211
05cca6e5
GKH		 1212int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
1213 int where, u8 *val);
1214int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
1215 int where, u16 *val);
1216int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
1217 int where, u32 *val);
1218int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
1219 int where, u8 val);
1220int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
1221 int where, u16 val);
1222int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
1223 int where, u32 val);
1f94a94f
RH		 1224
1225int pci_generic_config_read(struct pci_bus *bus, unsigned int devfn,
1226 int where, int size, u32 *val);
1227int pci_generic_config_write(struct pci_bus *bus, unsigned int devfn,
1228 int where, int size, u32 val);
1229int pci_generic_config_read32(struct pci_bus *bus, unsigned int devfn,
1230 int where, int size, u32 *val);
1231int pci_generic_config_write32(struct pci_bus *bus, unsigned int devfn,
1232 int where, int size, u32 val);
1233
a72b46c3 1234struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
1da177e4 1235
d3881e50
KB		 1236int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val);
1237int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val);
1238int pci_read_config_dword(const struct pci_dev *dev, int where, u32 *val);
1239int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val);
1240int pci_write_config_word(const struct pci_dev *dev, int where, u16 val);
1241int pci_write_config_dword(const struct pci_dev *dev, int where, u32 val);
ac160871
SX		 1242void pci_clear_and_set_config_dword(const struct pci_dev *dev, int pos,
1243 u32 clear, u32 set);
1da177e4 1244
8c0d3a02
JL		 1245int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val);
1246int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val);
1247int pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val);
1248int pcie_capability_write_dword(struct pci_dev *dev, int pos, u32 val);
5e70d0ac
IJ		 1249int pcie_capability_clear_and_set_word_unlocked(struct pci_dev *dev, int pos,
1250 u16 clear, u16 set);
1251int pcie_capability_clear_and_set_word_locked(struct pci_dev *dev, int pos,
1252 u16 clear, u16 set);
8c0d3a02
JL		 1253int pcie_capability_clear_and_set_dword(struct pci_dev *dev, int pos,
1254 u32 clear, u32 set);
1255
5e70d0ac
IJ		 1256/**
1257 * pcie_capability_clear_and_set_word - RMW accessor for PCI Express Capability Registers
1258 * @dev: PCI device structure of the PCI Express device
1259 * @pos: PCI Express Capability Register
1260 * @clear: Clear bitmask
1261 * @set: Set bitmask
1262 *
1263 * Perform a Read-Modify-Write (RMW) operation using @clear and @set
1264 * bitmasks on PCI Express Capability Register at @pos. Certain PCI Express
1265 * Capability Registers are accessed concurrently in RMW fashion, hence
1266 * require locking which is handled transparently to the caller.
1267 */
1268static inline int pcie_capability_clear_and_set_word(struct pci_dev *dev,
1269 int pos,
1270 u16 clear, u16 set)
1271{
1272 switch (pos) {
1273 case PCI_EXP_LNKCTL:
1274 case PCI_EXP_RTCTL:
1275 return pcie_capability_clear_and_set_word_locked(dev, pos,
1276 clear, set);
1277 default:
1278 return pcie_capability_clear_and_set_word_unlocked(dev, pos,
1279 clear, set);
1280 }
1281}
1282
8c0d3a02
JL		 1283static inline int pcie_capability_set_word(struct pci_dev *dev, int pos,
1284 u16 set)
1285{
1286 return pcie_capability_clear_and_set_word(dev, pos, 0, set);
1287}
1288
1289static inline int pcie_capability_set_dword(struct pci_dev *dev, int pos,
1290 u32 set)
1291{
1292 return pcie_capability_clear_and_set_dword(dev, pos, 0, set);
1293}
1294
1295static inline int pcie_capability_clear_word(struct pci_dev *dev, int pos,
1296 u16 clear)
1297{
1298 return pcie_capability_clear_and_set_word(dev, pos, clear, 0);
1299}
1300
1301static inline int pcie_capability_clear_dword(struct pci_dev *dev, int pos,
1302 u32 clear)
1303{
1304 return pcie_capability_clear_and_set_dword(dev, pos, clear, 0);
1305}
1306
0aa0f5d1 1307/* User-space driven config access */
c63587d7
AW		 1308int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
1309int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
1310int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val);
1311int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val);
1312int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val);
1313int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val);
1314
4a7fb636 1315int __must_check pci_enable_device(struct pci_dev *dev);
b718989d 1316int __must_check pci_enable_device_mem(struct pci_dev *dev);
0b62e13b 1317int __must_check pci_reenable_device(struct pci_dev *);
9ac7849e
TH		 1318int __must_check pcim_enable_device(struct pci_dev *pdev);
1319void pcim_pin_device(struct pci_dev *pdev);
1320
99b3c58f
PG		 1321static inline bool pci_intx_mask_supported(struct pci_dev *pdev)
1322{
1323 /*
1324 * INTx masking is supported if PCI_COMMAND_INTX_DISABLE is
1325 * writable and no quirk has marked the feature broken.
1326 */
1327 return !pdev->broken_intx_masking;
1328}
1329
296ccb08
YS		 1330static inline int pci_is_enabled(struct pci_dev *pdev)
1331{
1332 return (atomic_read(&pdev->enable_cnt) > 0);
1333}
1334
9ac7849e
TH		 1335static inline int pci_is_managed(struct pci_dev *pdev)
1336{
1337 return pdev->is_managed;
1338}
1339
1da177e4 1340void pci_disable_device(struct pci_dev *dev);
96c55900
MS		 1341
1342extern unsigned int pcibios_max_latency;
1da177e4 1343void pci_set_master(struct pci_dev *dev);
6a479079 1344void pci_clear_master(struct pci_dev *dev);
96c55900 1345
f7bdd12d 1346int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
15ea76d4 1347int pci_set_cacheline_size(struct pci_dev *dev);
4a7fb636 1348int __must_check pci_set_mwi(struct pci_dev *dev);
fc0f9f4d 1349int __must_check pcim_set_mwi(struct pci_dev *dev);
694625c0 1350int pci_try_set_mwi(struct pci_dev *dev);
1da177e4 1351void pci_clear_mwi(struct pci_dev *dev);
1fd3dde5 1352void pci_disable_parity(struct pci_dev *dev);
a04ce0ff 1353void pci_intx(struct pci_dev *dev, int enable);
a2e27787
JK		 1354bool pci_check_and_mask_intx(struct pci_dev *dev);
1355bool pci_check_and_unmask_intx(struct pci_dev *dev);
157e876f 1356int pci_wait_for_pending(struct pci_dev *dev, int pos, u16 mask);
3775a209 1357int pci_wait_for_pending_transaction(struct pci_dev *dev);
d556ad4b
PO		 1358int pcix_get_max_mmrbc(struct pci_dev *dev);
1359int pcix_get_mmrbc(struct pci_dev *dev);
1360int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
2637e5b5 1361int pcie_get_readrq(struct pci_dev *dev);
d556ad4b 1362int pcie_set_readrq(struct pci_dev *dev, int rq);
b03e7495
JM		 1363int pcie_get_mps(struct pci_dev *dev);
1364int pcie_set_mps(struct pci_dev *dev, int mps);
6db79a88
TG		 1365u32 pcie_bandwidth_available(struct pci_dev *dev, struct pci_dev **limiting_dev,
1366 enum pci_bus_speed *speed,
1367 enum pcie_link_width *width);
4d07a053 1368int pcie_link_speed_mbps(struct pci_dev *pdev);
9e506a7b 1369void pcie_print_link_status(struct pci_dev *dev);
9bdc81ce 1370int pcie_reset_flr(struct pci_dev *dev, bool probe);
91295d79 1371int pcie_flr(struct pci_dev *dev);
a96d627a 1372int __pci_reset_function_locked(struct pci_dev *dev);
8dd7f803 1373int pci_reset_function(struct pci_dev *dev);
a477b9cd 1374int pci_reset_function_locked(struct pci_dev *dev);
61cf16d8 1375int pci_try_reset_function(struct pci_dev *dev);
9a3d2b9b 1376int pci_probe_reset_slot(struct pci_slot *slot);
9a3d2b9b 1377int pci_probe_reset_bus(struct pci_bus *bus);
c6a44ba9 1378int pci_reset_bus(struct pci_dev *dev);
9e33002f
GS		 1379void pci_reset_secondary_bus(struct pci_dev *dev);
1380void pcibios_reset_secondary_bus(struct pci_dev *dev);
14add80b 1381void pci_update_resource(struct pci_dev *dev, int resno);
4a7fb636 1382int __must_check pci_assign_resource(struct pci_dev *dev, int i);
2bbc6942 1383int __must_check pci_reassign_resource(struct pci_dev *dev, int i, resource_size_t add_size, resource_size_t align);
8bb705e3 1384void pci_release_resource(struct pci_dev *dev, int resno);
192f1bf7
ND		 1385static inline int pci_rebar_bytes_to_size(u64 bytes)
1386{
1387 bytes = roundup_pow_of_two(bytes);
1388
1389 /* Return BAR size as defined in the resizable BAR specification */
1390 return max(ilog2(bytes), 20) - 20;
1391}
1392
8fbdbb66 1393u32 pci_rebar_get_possible_sizes(struct pci_dev *pdev, int bar);
8bb705e3 1394int __must_check pci_resize_resource(struct pci_dev *dev, int i, int size);
c87deff7 1395int pci_select_bars(struct pci_dev *dev, unsigned long flags);
8496e85c 1396bool pci_device_is_present(struct pci_dev *pdev);
08249651 1397void pci_ignore_hotplug(struct pci_dev *dev);
2856ba60 1398struct pci_dev *pci_real_dma_dev(struct pci_dev *dev);
ec5d9e87 1399int pci_status_get_and_clear_errors(struct pci_dev *pdev);
1da177e4 1400
704e8953
CH		 1401int __printf(6, 7) pci_request_irq(struct pci_dev *dev, unsigned int nr,
1402 irq_handler_t handler, irq_handler_t thread_fn, void *dev_id,
1403 const char *fmt, ...);
1404void pci_free_irq(struct pci_dev *dev, unsigned int nr, void *dev_id);
1405
1da177e4 1406/* ROM control related routines */
e416de5e
AC		 1407int pci_enable_rom(struct pci_dev *pdev);
1408void pci_disable_rom(struct pci_dev *pdev);
144a50ea 1409void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
1da177e4 1410void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
1da177e4
LT		 1411
1412/* Power management related routines */
1413int pci_save_state(struct pci_dev *dev);
1d3c16a8 1414void pci_restore_state(struct pci_dev *dev);
ffbdd3f7 1415struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev);
98d9b271
KRW		 1416int pci_load_saved_state(struct pci_dev *dev,
1417 struct pci_saved_state *state);
ffbdd3f7
AW		 1418int pci_load_and_free_saved_state(struct pci_dev *dev,
1419 struct pci_saved_state **state);
d6aa37cd 1420int pci_platform_power_transition(struct pci_dev *dev, pci_power_t state);
9c8550ee 1421int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
1e560864 1422int pci_set_power_state_locked(struct pci_dev *dev, pci_power_t state);
9c8550ee 1423pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
e5899e1b 1424bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
5a6c9b60 1425void pci_pme_active(struct pci_dev *dev, bool enable);
0847684c 1426int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable);
0235c4fc 1427int pci_wake_from_d3(struct pci_dev *dev, bool enable);
404cc2d8
RW		 1428int pci_prepare_to_sleep(struct pci_dev *dev);
1429int pci_back_from_sleep(struct pci_dev *dev);
b67ea761 1430bool pci_dev_run_wake(struct pci_dev *dev);
9d26d3a8
MW		 1431void pci_d3cold_enable(struct pci_dev *dev);
1432void pci_d3cold_disable(struct pci_dev *dev);
a99b646a 1433bool pcie_relaxed_ordering_enabled(struct pci_dev *dev);
99efde6c 1434void pci_resume_bus(struct pci_bus *bus);
2a4d2c42 1435void pci_bus_set_current_state(struct pci_bus *bus, pci_power_t state);
1da177e4 1436
bb209c82
BH		 1437/* For use by arch with custom probe code */
1438void set_pcie_port_type(struct pci_dev *pdev);
1439void set_pcie_hotplug_bridge(struct pci_dev *pdev);
1440
ce5ccdef 1441/* Functions for PCI Hotplug drivers to use */
2f320521 1442unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge);
3ed4fd96 1443unsigned int pci_rescan_bus(struct pci_bus *bus);
9d16947b
RW		 1444void pci_lock_rescan_remove(void);
1445void pci_unlock_rescan_remove(void);
ce5ccdef 1446
0aa0f5d1 1447/* Vital Product Data routines */
287d19ce
SH		 1448ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
1449ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
bf2928c7
HK		 1450ssize_t pci_read_vpd_any(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
1451ssize_t pci_write_vpd_any(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
287d19ce 1452
1da177e4 1453/* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
925845bd 1454resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx);
ea741551 1455void pci_bus_assign_resources(const struct pci_bus *bus);
765bf9b7 1456void pci_bus_claim_resources(struct pci_bus *bus);
1da177e4
LT		 1457void pci_bus_size_bridges(struct pci_bus *bus);
1458int pci_claim_resource(struct pci_dev *, int);
8505e729 1459int pci_claim_bridge_resource(struct pci_dev *bridge, int i);
1da177e4 1460void pci_assign_unassigned_resources(void);
6841ec68 1461void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
17787940 1462void pci_assign_unassigned_bus_resources(struct pci_bus *bus);
39772038 1463void pci_assign_unassigned_root_bus_resources(struct pci_bus *bus);
8bb705e3 1464int pci_reassign_bridge_resources(struct pci_dev *bridge, unsigned long type);
842de40d 1465int pci_enable_resources(struct pci_dev *, int mask);
47a650f2 1466void pci_assign_irq(struct pci_dev *dev);
afd29f90 1467struct resource *pci_find_resource(struct pci_dev *dev, struct resource *res);
1da177e4 1468#define HAVE_PCI_REQ_REGIONS 2
4a7fb636 1469int __must_check pci_request_regions(struct pci_dev *, const char *);
e8de1481 1470int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
1da177e4 1471void pci_release_regions(struct pci_dev *);
4a7fb636 1472int __must_check pci_request_region(struct pci_dev *, int, const char *);
1da177e4 1473void pci_release_region(struct pci_dev *, int);
c87deff7 1474int pci_request_selected_regions(struct pci_dev *, int, const char *);
e8de1481 1475int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
c87deff7 1476void pci_release_selected_regions(struct pci_dev *, int);
1da177e4 1477
27829479
IW		 1478static inline __must_check struct resource *
1479pci_request_config_region_exclusive(struct pci_dev *pdev, unsigned int offset,
1480 unsigned int len, const char *name)
1481{
1482 return __request_region(&pdev->driver_exclusive_resource, offset, len,
1483 name, IORESOURCE_EXCLUSIVE);
1484}
1485
1486static inline void pci_release_config_region(struct pci_dev *pdev,
1487 unsigned int offset,
1488 unsigned int len)
1489{
1490 __release_region(&pdev->driver_exclusive_resource, offset, len);
1491}
1492
1da177e4 1493/* drivers/pci/bus.c */
45ca9e97 1494void pci_add_resource(struct list_head *resources, struct resource *res);
0efd5aab
BH		 1495void pci_add_resource_offset(struct list_head *resources, struct resource *res,
1496 resource_size_t offset);
45ca9e97 1497void pci_free_resource_list(struct list_head *resources);
950334bc
BH		 1498void pci_bus_add_resource(struct pci_bus *bus, struct resource *res,
1499 unsigned int flags);
2fe2abf8
BH		 1500struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n);
1501void pci_bus_remove_resources(struct pci_bus *bus);
ab909509 1502void pci_bus_remove_resource(struct pci_bus *bus, struct resource *res);
950334bc
BH		 1503int devm_request_pci_bus_resources(struct device *dev,
1504 struct list_head *resources);
2fe2abf8 1505
bfc45606
DD		 1506/* Temporary until new and working PCI SBR API in place */
1507int pci_bridge_secondary_bus_reset(struct pci_dev *dev);
1508
02992064
AS		 1509#define __pci_bus_for_each_res0(bus, res, ...) \
1510 for (unsigned int __b = 0; \
1511 (res = pci_bus_resource_n(bus, __b)) || __b < PCI_BRIDGE_RESOURCE_NUM; \
1512 __b++)
1513
1514#define __pci_bus_for_each_res1(bus, res, __b) \
1515 for (__b = 0; \
1516 (res = pci_bus_resource_n(bus, __b)) || __b < PCI_BRIDGE_RESOURCE_NUM; \
1517 __b++)
1518
ceb928be
AS		 1519/**
1520 * pci_bus_for_each_resource - iterate over PCI bus resources
1521 * @bus: the PCI bus
1522 * @res: pointer to the current resource
02992064 1523 * @...: optional index of the current resource
ceb928be
AS		 1524 *
1525 * Iterate over PCI bus resources. The first part is to go over PCI bus
1526 * resource array, which has at most the %PCI_BRIDGE_RESOURCE_NUM entries.
1527 * After that continue with the separate list of the additional resources,
1528 * if not empty. That's why the Logical OR is being used.
1529 *
1530 * Possible usage:
1531 *
1532 * struct pci_bus *bus = ...;
1533 * struct resource *res;
1534 * unsigned int i;
1535 *
02992064 1536 * // With optional index
ceb928be
AS		 1537 * pci_bus_for_each_resource(bus, res, i)
1538 * pr_info("PCI bus resource[%u]: %pR\n", i, res);
02992064
AS		 1539 *
1540 * // Without index
1541 * pci_bus_for_each_resource(bus, res)
1542 * _do_something_(res);
ceb928be 1543 */
02992064
AS		 1544#define pci_bus_for_each_resource(bus, res, ...) \
1545 CONCATENATE(__pci_bus_for_each_res, COUNT_ARGS(__VA_ARGS__)) \
1546 (bus, res, __VA_ARGS__)
89a74ecc 1547
4a7fb636
AM		 1548int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
1549 struct resource *res, resource_size_t size,
1550 resource_size_t align, resource_size_t min,
664c2848 1551 unsigned long type_mask,
3b7a17fc
DB		 1552 resource_size_t (*alignf)(void *,
1553 const struct resource *,
b26b2d49
DB		 1554 resource_size_t,
1555 resource_size_t),
4a7fb636 1556 void *alignf_data);
1da177e4 1557
8b921acf 1558
fcfaab30
GP		 1559int pci_register_io_range(struct fwnode_handle *fwnode, phys_addr_t addr,
1560 resource_size_t size);
c5076cfe
TN		 1561unsigned long pci_address_to_pio(phys_addr_t addr);
1562phys_addr_t pci_pio_to_address(unsigned long pio);
8b921acf 1563int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr);
a5fb9fb0
SS		 1564int devm_pci_remap_iospace(struct device *dev, const struct resource *res,
1565 phys_addr_t phys_addr);
4d3f1384 1566void pci_unmap_iospace(struct resource *res);
490cb6dd
LP		 1567void __iomem *devm_pci_remap_cfgspace(struct device *dev,
1568 resource_size_t offset,
1569 resource_size_t size);
1570void __iomem *devm_pci_remap_cfg_resource(struct device *dev,
1571 struct resource *res);
8b921acf 1572
3a9ad0b4 1573static inline pci_bus_addr_t pci_bus_address(struct pci_dev *pdev, int bar)
06cf56e4
BH		 1574{
1575 struct pci_bus_region region;
1576
1577 pcibios_resource_to_bus(pdev->bus, &region, &pdev->resource[bar]);
1578 return region.start;
1579}
1580
863b18f4 1581/* Proper probing supporting hot-pluggable devices */
725522b5
GKH		 1582int __must_check __pci_register_driver(struct pci_driver *, struct module *,
1583 const char *mod_name);
bba81165 1584
0aa0f5d1 1585/* pci_register_driver() must be a macro so KBUILD_MODNAME can be expanded */
bba81165
AM		 1586#define pci_register_driver(driver) \
1587 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
863b18f4 1588
05cca6e5 1589void pci_unregister_driver(struct pci_driver *dev);
aad4f400
GKH		 1590
1591/**
1592 * module_pci_driver() - Helper macro for registering a PCI driver
1593 * @__pci_driver: pci_driver struct
1594 *
1595 * Helper macro for PCI drivers which do not do anything special in module
1596 * init/exit. This eliminates a lot of boilerplate. Each module may only
1597 * use this macro once, and calling it replaces module_init() and module_exit()
1598 */
1599#define module_pci_driver(__pci_driver) \
0aa0f5d1 1600 module_driver(__pci_driver, pci_register_driver, pci_unregister_driver)
aad4f400 1601
b4eb6cdb
PG		 1602/**
1603 * builtin_pci_driver() - Helper macro for registering a PCI driver
1604 * @__pci_driver: pci_driver struct
1605 *
1606 * Helper macro for PCI drivers which do not do anything special in their
1607 * init code. This eliminates a lot of boilerplate. Each driver may only
1608 * use this macro once, and calling it replaces device_initcall(...)
1609 */
1610#define builtin_pci_driver(__pci_driver) \
1611 builtin_driver(__pci_driver, pci_register_driver)
1612
05cca6e5 1613struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
9dba910e
TH		 1614int pci_add_dynid(struct pci_driver *drv,
1615 unsigned int vendor, unsigned int device,
1616 unsigned int subvendor, unsigned int subdevice,
1617 unsigned int class, unsigned int class_mask,
1618 unsigned long driver_data);
05cca6e5
GKH		 1619const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
1620 struct pci_dev *dev);
1621int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
1622 int pass);
1da177e4 1623
70298c6e 1624void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
cecf4864 1625 void *userdata);
1e560864
JH		 1626void pci_walk_bus_locked(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
1627 void *userdata);
ac7dc65a 1628int pci_cfg_space_size(struct pci_dev *dev);
05cca6e5 1629unsigned char pci_bus_max_busnr(struct pci_bus *bus);
e2444273 1630void pci_setup_bridge(struct pci_bus *bus);
ac5ad93e
GS		 1631resource_size_t pcibios_window_alignment(struct pci_bus *bus,
1632 unsigned long type);
cecf4864 1633
3448a19d
DA		 1634#define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
1635#define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)
1636
deb2d2ec 1637int pci_set_vga_state(struct pci_dev *pdev, bool decode,
3448a19d 1638 unsigned int command_bits, u32 flags);
fe537670 1639
d7cc609f
LG		 1640/*
1641 * Virtual interrupts allow for more interrupts to be allocated
1642 * than the device has interrupts for. These are not programmed
1643 * into the device's MSI-X table and must be handled by some
1644 * other driver means.
1645 */
1646#define PCI_IRQ_VIRTUAL (1 << 4)
1647
0e1fdd22 1648#define PCI_IRQ_ALL_TYPES (PCI_IRQ_INTX | PCI_IRQ_MSI | PCI_IRQ_MSIX)
aff17164 1649
1da177e4
LT		 1650#include <linux/dmapool.h>
1651
1da177e4 1652struct msix_entry {
0aa0f5d1
BH		 1653 u32 vector; /* Kernel uses to write allocated vector */
1654 u16 entry; /* Driver uses to specify entry, OS writes */
1da177e4
LT		 1655};
1656
41efa431
RC		 1657struct msi_domain_template;
1658
4c859804
BH		 1659#ifdef CONFIG_PCI_MSI
1660int pci_msi_vec_count(struct pci_dev *dev);
f39d5b72 1661void pci_disable_msi(struct pci_dev *dev);
4c859804 1662int pci_msix_vec_count(struct pci_dev *dev);
f39d5b72 1663void pci_disable_msix(struct pci_dev *dev);
f39d5b72
BH		 1664void pci_restore_msi_state(struct pci_dev *dev);
1665int pci_msi_enabled(void);
4fe03955 1666int pci_enable_msi(struct pci_dev *dev);
4c859804
BH		 1667int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
1668 int minvec, int maxvec);
f7fc32cb
AG		 1669static inline int pci_enable_msix_exact(struct pci_dev *dev,
1670 struct msix_entry *entries, int nvec)
1671{
1672 int rc = pci_enable_msix_range(dev, entries, nvec, nvec);
1673 if (rc < 0)
1674 return rc;
1675 return 0;
1676}
5c0997dc
AD		 1677int pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs,
1678 unsigned int max_vecs, unsigned int flags);
402723ad
CH		 1679int pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1680 unsigned int max_vecs, unsigned int flags,
c66d4bd1 1681 struct irq_affinity *affd);
402723ad 1682
34026364
TG		 1683bool pci_msix_can_alloc_dyn(struct pci_dev *dev);
1684struct msi_map pci_msix_alloc_irq_at(struct pci_dev *dev, unsigned int index,
1685 const struct irq_affinity_desc *affdesc);
1686void pci_msix_free_irq(struct pci_dev *pdev, struct msi_map map);
1687
aff17164
CH		 1688void pci_free_irq_vectors(struct pci_dev *dev);
1689int pci_irq_vector(struct pci_dev *dev, unsigned int nr);
ee8d41e5 1690const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev, int vec);
41efa431
RC		 1691bool pci_create_ims_domain(struct pci_dev *pdev, const struct msi_domain_template *template,
1692 unsigned int hwsize, void *data);
1693struct msi_map pci_ims_alloc_irq(struct pci_dev *pdev, union msi_instance_cookie *icookie,
1694 const struct irq_affinity_desc *affdesc);
1695void pci_ims_free_irq(struct pci_dev *pdev, struct msi_map map);
aff17164 1696
4c859804 1697#else
2ee546c4 1698static inline int pci_msi_vec_count(struct pci_dev *dev) { return -ENOSYS; }
2ee546c4
BH		 1699static inline void pci_disable_msi(struct pci_dev *dev) { }
1700static inline int pci_msix_vec_count(struct pci_dev *dev) { return -ENOSYS; }
2ee546c4 1701static inline void pci_disable_msix(struct pci_dev *dev) { }
2ee546c4
BH		 1702static inline void pci_restore_msi_state(struct pci_dev *dev) { }
1703static inline int pci_msi_enabled(void) { return 0; }
4fe03955 1704static inline int pci_enable_msi(struct pci_dev *dev)
f7fc32cb 1705{ return -ENOSYS; }
302a2523 1706static inline int pci_enable_msix_range(struct pci_dev *dev,
0aa0f5d1 1707 struct msix_entry *entries, int minvec, int maxvec)
2ee546c4 1708{ return -ENOSYS; }
f7fc32cb 1709static inline int pci_enable_msix_exact(struct pci_dev *dev,
0aa0f5d1 1710 struct msix_entry *entries, int nvec)
f7fc32cb 1711{ return -ENOSYS; }
402723ad
CH		 1712
1713static inline int
1714pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1715 unsigned int max_vecs, unsigned int flags,
c66d4bd1 1716 struct irq_affinity *aff_desc)
aff17164 1717{
0e1fdd22 1718 if ((flags & PCI_IRQ_INTX) && min_vecs == 1 && dev->irq)
83b4605b
CH		 1719 return 1;
1720 return -ENOSPC;
aff17164 1721}
5c0997dc
AD		 1722static inline int
1723pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs,
1724 unsigned int max_vecs, unsigned int flags)
1725{
1726 return pci_alloc_irq_vectors_affinity(dev, min_vecs, max_vecs,
1727 flags, NULL);
1728}
402723ad 1729
195d8e5d
RC		 1730static inline bool pci_msix_can_alloc_dyn(struct pci_dev *dev)
1731{ return false; }
2b129f0b
RC		 1732static inline struct msi_map pci_msix_alloc_irq_at(struct pci_dev *dev, unsigned int index,
1733 const struct irq_affinity_desc *affdesc)
1734{
1735 struct msi_map map = { .index = -ENOSYS, };
1736
1737 return map;
1738}
1739
1740static inline void pci_msix_free_irq(struct pci_dev *pdev, struct msi_map map)
1741{
1742}
1743
aff17164
CH		 1744static inline void pci_free_irq_vectors(struct pci_dev *dev)
1745{
1746}
1747
1748static inline int pci_irq_vector(struct pci_dev *dev, unsigned int nr)
1749{
1750 if (WARN_ON_ONCE(nr > 0))
1751 return -EINVAL;
1752 return dev->irq;
1753}
ee8d41e5
TG		 1754static inline const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev,
1755 int vec)
1756{
1757 return cpu_possible_mask;
1758}
41efa431
RC		 1759
1760static inline bool pci_create_ims_domain(struct pci_dev *pdev,
1761 const struct msi_domain_template *template,
1762 unsigned int hwsize, void *data)
1763{ return false; }
1764
1765static inline struct msi_map pci_ims_alloc_irq(struct pci_dev *pdev,
1766 union msi_instance_cookie *icookie,
1767 const struct irq_affinity_desc *affdesc)
1768{
1769 struct msi_map map = { .index = -ENOSYS, };
1770
1771 return map;
1772}
1773
1774static inline void pci_ims_free_irq(struct pci_dev *pdev, struct msi_map map)
1775{
1776}
1777
1da177e4
LT		 1778#endif
1779
0d58e6c1
PB		 1780/**
1781 * pci_irqd_intx_xlate() - Translate PCI INTx value to an IRQ domain hwirq
1782 * @d: the INTx IRQ domain
1783 * @node: the DT node for the device whose interrupt we're translating
1784 * @intspec: the interrupt specifier data from the DT
1785 * @intsize: the number of entries in @intspec
1786 * @out_hwirq: pointer at which to write the hwirq number
1787 * @out_type: pointer at which to write the interrupt type
1788 *
1789 * Translate a PCI INTx interrupt number from device tree in the range 1-4, as
1790 * stored in the standard PCI_INTERRUPT_PIN register, to a value in the range
1791 * 0-3 suitable for use in a 4 entry IRQ domain. That is, subtract one from the
1792 * INTx value to obtain the hwirq number.
1793 *
1794 * Returns 0 on success, or -EINVAL if the interrupt specifier is out of range.
1795 */
1796static inline int pci_irqd_intx_xlate(struct irq_domain *d,
1797 struct device_node *node,
1798 const u32 *intspec,
1799 unsigned int intsize,
1800 unsigned long *out_hwirq,
1801 unsigned int *out_type)
1802{
1803 const u32 intx = intspec[0];
1804
1805 if (intx < PCI_INTERRUPT_INTA || intx > PCI_INTERRUPT_INTD)
1806 return -EINVAL;
1807
1808 *out_hwirq = intx - PCI_INTERRUPT_INTA;
1809 return 0;
1810}
1811
ab0724ff 1812#ifdef CONFIG_PCIEPORTBUS
415e12b2 1813extern bool pcie_ports_disabled;
5352a44a 1814extern bool pcie_ports_native;
ab0724ff
MT		 1815#else
1816#define pcie_ports_disabled true
5352a44a 1817#define pcie_ports_native false
ab0724ff 1818#endif
415e12b2 1819
aff5d055
HK		 1820#define PCIE_LINK_STATE_L0S BIT(0)
1821#define PCIE_LINK_STATE_L1 BIT(1)
1822#define PCIE_LINK_STATE_CLKPM BIT(2)
1823#define PCIE_LINK_STATE_L1_1 BIT(3)
1824#define PCIE_LINK_STATE_L1_2 BIT(4)
1825#define PCIE_LINK_STATE_L1_1_PCIPM BIT(5)
1826#define PCIE_LINK_STATE_L1_2_PCIPM BIT(6)
de82f60f
MB		 1827#define PCIE_LINK_STATE_ALL (PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |\
1828 PCIE_LINK_STATE_CLKPM | PCIE_LINK_STATE_L1_1 |\
1829 PCIE_LINK_STATE_L1_2 | PCIE_LINK_STATE_L1_1_PCIPM |\
1830 PCIE_LINK_STATE_L1_2_PCIPM)
7ce2e76a 1831
4c859804 1832#ifdef CONFIG_PCIEASPM
7ce2e76a
KW		 1833int pci_disable_link_state(struct pci_dev *pdev, int state);
1834int pci_disable_link_state_locked(struct pci_dev *pdev, int state);
de82f60f 1835int pci_enable_link_state(struct pci_dev *pdev, int state);
718ab822 1836int pci_enable_link_state_locked(struct pci_dev *pdev, int state);
7ce2e76a 1837void pcie_no_aspm(void);
f39d5b72 1838bool pcie_aspm_support_enabled(void);
accd2dd7 1839bool pcie_aspm_enabled(struct pci_dev *pdev);
4c859804 1840#else
7ce2e76a
KW		 1841static inline int pci_disable_link_state(struct pci_dev *pdev, int state)
1842{ return 0; }
1843static inline int pci_disable_link_state_locked(struct pci_dev *pdev, int state)
1844{ return 0; }
de82f60f
MB		 1845static inline int pci_enable_link_state(struct pci_dev *pdev, int state)
1846{ return 0; }
718ab822
JH		 1847static inline int pci_enable_link_state_locked(struct pci_dev *pdev, int state)
1848{ return 0; }
7ce2e76a 1849static inline void pcie_no_aspm(void) { }
4c859804 1850static inline bool pcie_aspm_support_enabled(void) { return false; }
accd2dd7 1851static inline bool pcie_aspm_enabled(struct pci_dev *pdev) { return false; }
3e1b1600
AP		 1852#endif
1853
415e12b2 1854#ifdef CONFIG_PCIEAER
415e12b2
RW		 1855bool pci_aer_available(void);
1856#else
415e12b2
RW		 1857static inline bool pci_aer_available(void) { return false; }
1858#endif
1859
cef74409
GK		 1860bool pci_ats_disabled(void);
1861
1d71eb53
VCG		 1862#ifdef CONFIG_PCIE_PTM
1863int pci_enable_ptm(struct pci_dev *dev, u8 *granularity);
e8bdc5ea 1864void pci_disable_ptm(struct pci_dev *dev);
014408cd 1865bool pcie_ptm_enabled(struct pci_dev *dev);
1d71eb53
VCG		 1866#else
1867static inline int pci_enable_ptm(struct pci_dev *dev, u8 *granularity)
1868{ return -EINVAL; }
e8bdc5ea 1869static inline void pci_disable_ptm(struct pci_dev *dev) { }
014408cd
VCG		 1870static inline bool pcie_ptm_enabled(struct pci_dev *dev)
1871{ return false; }
1d71eb53
VCG		 1872#endif
1873
f39d5b72
BH		 1874void pci_cfg_access_lock(struct pci_dev *dev);
1875bool pci_cfg_access_trylock(struct pci_dev *dev);
1876void pci_cfg_access_unlock(struct pci_dev *dev);
e04b0ea2 1877
dfd5bb23 1878void pci_dev_lock(struct pci_dev *dev);
e3a9b121
LC		 1879int pci_dev_trylock(struct pci_dev *dev);
1880void pci_dev_unlock(struct pci_dev *dev);
ced085ef 1881DEFINE_GUARD(pci_dev, struct pci_dev *, pci_dev_lock(_T), pci_dev_unlock(_T))
e3a9b121 1882
4352dfd5
GKH		 1883/*
1884 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
f7625980 1885 * a PCI domain is defined to be a set of PCI buses which share
4352dfd5
GKH		 1886 * configuration space.
1887 */
32a2eea7
JG		 1888#ifdef CONFIG_PCI_DOMAINS
1889extern int pci_domains_supported;
1890#else
1891enum { pci_domains_supported = 0 };
2ee546c4
BH		 1892static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1893static inline int pci_proc_domain(struct pci_bus *bus) { return 0; }
32a2eea7 1894#endif /* CONFIG_PCI_DOMAINS */
1da177e4 1895
670ba0c8
CM		 1896/*
1897 * Generic implementation for PCI domain support. If your
1898 * architecture does not need custom management of PCI
1899 * domains then this implementation will be used
1900 */
1901#ifdef CONFIG_PCI_DOMAINS_GENERIC
1902static inline int pci_domain_nr(struct pci_bus *bus)
1903{
1904 return bus->domain_nr;
1905}
2ab51dde
TN		 1906#ifdef CONFIG_ACPI
1907int acpi_pci_bus_find_domain_nr(struct pci_bus *bus);
670ba0c8 1908#else
2ab51dde
TN		 1909static inline int acpi_pci_bus_find_domain_nr(struct pci_bus *bus)
1910{ return 0; }
1911#endif
9c7cb891 1912int pci_bus_find_domain_nr(struct pci_bus *bus, struct device *parent);
c14f7ccc 1913void pci_bus_release_domain_nr(struct pci_bus *bus, struct device *parent);
670ba0c8
CM		 1914#endif
1915
0aa0f5d1 1916/* Some architectures require additional setup to direct VGA traffic */
95a8b6ef 1917typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
0aa0f5d1 1918 unsigned int command_bits, u32 flags);
f39d5b72 1919void pci_register_set_vga_state(arch_set_vga_state_t func);
95a8b6ef 1920
be9d2e89
JT		 1921static inline int
1922pci_request_io_regions(struct pci_dev *pdev, const char *name)
1923{
1924 return pci_request_selected_regions(pdev,
1925 pci_select_bars(pdev, IORESOURCE_IO), name);
1926}
1927
1928static inline void
1929pci_release_io_regions(struct pci_dev *pdev)
1930{
1931 return pci_release_selected_regions(pdev,
1932 pci_select_bars(pdev, IORESOURCE_IO));
1933}
1934
1935static inline int
1936pci_request_mem_regions(struct pci_dev *pdev, const char *name)
1937{
1938 return pci_request_selected_regions(pdev,
1939 pci_select_bars(pdev, IORESOURCE_MEM), name);
1940}
1941
1942static inline void
1943pci_release_mem_regions(struct pci_dev *pdev)
1944{
1945 return pci_release_selected_regions(pdev,
1946 pci_select_bars(pdev, IORESOURCE_MEM));
1947}
1948
4352dfd5 1949#else /* CONFIG_PCI is not enabled */
1da177e4 1950
5bbe029f
BH		 1951static inline void pci_set_flags(int flags) { }
1952static inline void pci_add_flags(int flags) { }
1953static inline void pci_clear_flags(int flags) { }
1954static inline int pci_has_flag(int flag) { return 0; }
1955
1da177e4 1956/*
0aa0f5d1
BH		 1957 * If the system does not have PCI, clearly these return errors. Define
1958 * these as simple inline functions to avoid hair in drivers.
1da177e4 1959 */
05cca6e5
GKH		 1960#define _PCI_NOP(o, s, t) \
1961 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
1962 int where, t val) \
1da177e4 1963 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
05cca6e5
GKH		 1964
1965#define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
1966 _PCI_NOP(o, word, u16 x) \
1967 _PCI_NOP(o, dword, u32 x)
1da177e4
LT		 1968_PCI_NOP_ALL(read, *)
1969_PCI_NOP_ALL(write,)
1970
d42552c3 1971static inline struct pci_dev *pci_get_device(unsigned int vendor,
05cca6e5
GKH		 1972 unsigned int device,
1973 struct pci_dev *from)
2ee546c4 1974{ return NULL; }
d42552c3 1975
05cca6e5
GKH		 1976static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
1977 unsigned int device,
1978 unsigned int ss_vendor,
1979 unsigned int ss_device,
b08508c4 1980 struct pci_dev *from)
2ee546c4 1981{ return NULL; }
1da177e4 1982
05cca6e5
GKH		 1983static inline struct pci_dev *pci_get_class(unsigned int class,
1984 struct pci_dev *from)
2ee546c4 1985{ return NULL; }
1da177e4 1986
d427da23
SJ		 1987static inline struct pci_dev *pci_get_base_class(unsigned int class,
1988 struct pci_dev *from)
1989{ return NULL; }
877fee2a
HG		 1990
1991static inline int pci_dev_present(const struct pci_device_id *ids)
1992{ return 0; }
1993
ed4aaadb 1994#define no_pci_devices() (1)
1da177e4
LT		 1995#define pci_dev_put(dev) do { } while (0)
1996
2ee546c4 1997static inline void pci_set_master(struct pci_dev *dev) { }
2aa5ac63 1998static inline void pci_clear_master(struct pci_dev *dev) { }
2ee546c4
BH		 1999static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
2000static inline void pci_disable_device(struct pci_dev *dev) { }
977da073 2001static inline int pcim_enable_device(struct pci_dev *pdev) { return -EIO; }
05cca6e5 2002static inline int pci_assign_resource(struct pci_dev *dev, int i)
2ee546c4 2003{ return -EBUSY; }
817f9916
AS		 2004static inline int __must_check __pci_register_driver(struct pci_driver *drv,
2005 struct module *owner,
2006 const char *mod_name)
2ee546c4 2007{ return 0; }
05cca6e5 2008static inline int pci_register_driver(struct pci_driver *drv)
2ee546c4
BH		 2009{ return 0; }
2010static inline void pci_unregister_driver(struct pci_driver *drv) { }
f646c2a0 2011static inline u8 pci_find_capability(struct pci_dev *dev, int cap)
2ee546c4 2012{ return 0; }
d41abe06 2013static inline u8 pci_find_next_capability(struct pci_dev *dev, u8 post, int cap)
2ee546c4 2014{ return 0; }
d41abe06 2015static inline u16 pci_find_ext_capability(struct pci_dev *dev, int cap)
2ee546c4 2016{ return 0; }
05cca6e5 2017
70c0923b
JK		 2018static inline u64 pci_get_dsn(struct pci_dev *dev)
2019{ return 0; }
2020
1da177e4 2021/* Power management related routines */
2ee546c4
BH		 2022static inline int pci_save_state(struct pci_dev *dev) { return 0; }
2023static inline void pci_restore_state(struct pci_dev *dev) { }
05cca6e5 2024static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
2ee546c4 2025{ return 0; }
1e560864
JH		 2026static inline int pci_set_power_state_locked(struct pci_dev *dev, pci_power_t state)
2027{ return 0; }
3449248c 2028static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable)
2ee546c4 2029{ return 0; }
05cca6e5
GKH		 2030static inline pci_power_t pci_choose_state(struct pci_dev *dev,
2031 pm_message_t state)
2ee546c4 2032{ return PCI_D0; }
05cca6e5
GKH		 2033static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
2034 int enable)
2ee546c4 2035{ return 0; }
48a92a81 2036
afd29f90
MW		 2037static inline struct resource *pci_find_resource(struct pci_dev *dev,
2038 struct resource *res)
2039{ return NULL; }
05cca6e5 2040static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
2ee546c4
BH		 2041{ return -EIO; }
2042static inline void pci_release_regions(struct pci_dev *dev) { }
0da0ead9 2043
00dcc7cf
RH		 2044static inline int pci_register_io_range(struct fwnode_handle *fwnode,
2045 phys_addr_t addr, resource_size_t size)
2046{ return -EINVAL; }
2047
c5076cfe
TN		 2048static inline unsigned long pci_address_to_pio(phys_addr_t addr) { return -1; }
2049
d80d0217
RD		 2050static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
2051{ return NULL; }
d80d0217
RD		 2052static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
2053 unsigned int devfn)
2054{ return NULL; }
7912af5c
RD		 2055static inline struct pci_dev *pci_get_domain_bus_and_slot(int domain,
2056 unsigned int bus, unsigned int devfn)
2057{ return NULL; }
d80d0217 2058
2ee546c4
BH		 2059static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
2060static inline struct pci_dev *pci_dev_get(struct pci_dev *dev) { return NULL; }
12ea6cad 2061
fb8a0d9d
WM		 2062#define dev_is_pci(d) (false)
2063#define dev_is_pf(d) (false)
fe594932
GU		 2064static inline bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags)
2065{ return false; }
80db6f08
NC		 2066static inline int pci_irqd_intx_xlate(struct irq_domain *d,
2067 struct device_node *node,
2068 const u32 *intspec,
2069 unsigned int intsize,
2070 unsigned long *out_hwirq,
2071 unsigned int *out_type)
2072{ return -EINVAL; }
9c212009
LR		 2073
2074static inline const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
2075 struct pci_dev *dev)
2076{ return NULL; }
b9ae16d8 2077static inline bool pci_ats_disabled(void) { return true; }
0d8006dd
HX		 2078
2079static inline int pci_irq_vector(struct pci_dev *dev, unsigned int nr)
2080{
2081 return -EINVAL;
2082}
2083
2084static inline int
2085pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
2086 unsigned int max_vecs, unsigned int flags,
2087 struct irq_affinity *aff_desc)
2088{
2089 return -ENOSPC;
2090}
0d8006dd
HX		 2091static inline int
2092pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs,
2093 unsigned int max_vecs, unsigned int flags)
2094{
5c0997dc 2095 return -ENOSPC;
0d8006dd 2096}
5c0997dc 2097#endif /* CONFIG_PCI */
0d8006dd 2098
4352dfd5
GKH		 2099/* Include architecture-dependent settings and functions */
2100
2101#include <asm/pci.h>
1da177e4 2102
0ad722f1 2103/*
f7195824
DW		 2104 * pci_mmap_resource_range() maps a specific BAR, and vm->vm_pgoff
2105 * is expected to be an offset within that region.
2106 *
f7195824
DW		 2107 */
2108int pci_mmap_resource_range(struct pci_dev *dev, int bar,
2109 struct vm_area_struct *vma,
2110 enum pci_mmap_state mmap_state, int write_combine);
11df1954 2111
ae749c7a
DW		 2112#ifndef arch_can_pci_mmap_wc
2113#define arch_can_pci_mmap_wc() 0
2114#endif
2bea36fd 2115
e854d8b2
DW		 2116#ifndef arch_can_pci_mmap_io
2117#define arch_can_pci_mmap_io() 0
2bea36fd
DW		 2118#define pci_iobar_pfn(pdev, bar, vma) (-EINVAL)
2119#else
2120int pci_iobar_pfn(struct pci_dev *pdev, int bar, struct vm_area_struct *vma);
e854d8b2 2121#endif
ae749c7a 2122
92016ba5
JO		 2123#ifndef pci_root_bus_fwnode
2124#define pci_root_bus_fwnode(bus) NULL
2125#endif
2126
0aa0f5d1
BH		 2127/*
2128 * These helpers provide future and backwards compatibility
2129 * for accessing popular PCI BAR info
2130 */
144d204d
AS		 2131#define pci_resource_n(dev, bar) (&(dev)->resource[(bar)])
2132#define pci_resource_start(dev, bar) (pci_resource_n(dev, bar)->start)
2133#define pci_resource_end(dev, bar) (pci_resource_n(dev, bar)->end)
2134#define pci_resource_flags(dev, bar) (pci_resource_n(dev, bar)->flags)
2135#define pci_resource_len(dev,bar) \
2136 (pci_resource_end((dev), (bar)) ? \
2137 resource_size(pci_resource_n((dev), (bar))) : 0)
1da177e4 2138
3171e46d
AS		 2139#define __pci_dev_for_each_res0(dev, res, ...) \
2140 for (unsigned int __b = 0; \
2141 __b < PCI_NUM_RESOURCES && (res = pci_resource_n(dev, __b)); \
09cc9006
MW		 2142 __b++)
2143
3171e46d
AS		 2144#define __pci_dev_for_each_res1(dev, res, __b) \
2145 for (__b = 0; \
2146 __b < PCI_NUM_RESOURCES && (res = pci_resource_n(dev, __b)); \
09cc9006
MW		 2147 __b++)
2148
2149#define pci_dev_for_each_resource(dev, res, ...) \
2150 CONCATENATE(__pci_dev_for_each_res, COUNT_ARGS(__VA_ARGS__)) \
2151 (dev, res, __VA_ARGS__)
1da177e4 2152
0aa0f5d1
BH		 2153/*
2154 * Similar to the helpers above, these manipulate per-pci_dev
1da177e4
LT		 2155 * driver-specific data. They are really just a wrapper around
2156 * the generic device structure functions of these calls.
2157 */
05cca6e5 2158static inline void *pci_get_drvdata(struct pci_dev *pdev)
1da177e4
LT		 2159{
2160 return dev_get_drvdata(&pdev->dev);
2161}
2162
05cca6e5 2163static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
1da177e4
LT		 2164{
2165 dev_set_drvdata(&pdev->dev, data);
2166}
2167
2fc90f61 2168static inline const char *pci_name(const struct pci_dev *pdev)
1da177e4 2169{
c6c4f070 2170 return dev_name(&pdev->dev);
1da177e4
LT		 2171}
2172
8221a013
BH		 2173void pci_resource_to_user(const struct pci_dev *dev, int bar,
2174 const struct resource *rsrc,
2175 resource_size_t *start, resource_size_t *end);
2311b1f2 2176
1da177e4 2177/*
0aa0f5d1
BH		 2178 * The world is not perfect and supplies us with broken PCI devices.
2179 * For at least a part of these bugs we need a work-around, so both
2180 * generic (drivers/pci/quirks.c) and per-architecture code can define
2181 * fixup hooks to be called for particular buggy devices.
1da177e4
LT		 2182 */
2183
2184struct pci_fixup {
0aa0f5d1
BH		 2185 u16 vendor; /* Or PCI_ANY_ID */
2186 u16 device; /* Or PCI_ANY_ID */
2187 u32 class; /* Or PCI_ANY_ID */
f4ca5c6a 2188 unsigned int class_shift; /* should be 0, 8, 16 */
c9d8b55f
AB		 2189#ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
2190 int hook_offset;
2191#else
1da177e4 2192 void (*hook)(struct pci_dev *dev);
c9d8b55f 2193#endif
1da177e4
LT		 2194};
2195
2196enum pci_fixup_pass {
2197 pci_fixup_early, /* Before probing BARs */
2198 pci_fixup_header, /* After reading configuration header */
2199 pci_fixup_final, /* Final phase of device fixups */
2200 pci_fixup_enable, /* pci_enable_device() time */
e1a2a51e 2201 pci_fixup_resume, /* pci_device_resume() */
7d2a01b8 2202 pci_fixup_suspend, /* pci_device_suspend() */
e1a2a51e 2203 pci_fixup_resume_early, /* pci_device_resume_early() */
7d2a01b8 2204 pci_fixup_suspend_late, /* pci_device_suspend_late() */
1da177e4
LT		 2205};
2206
c9d8b55f 2207#ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
09a4e4d9 2208#define ___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
c9d8b55f
AB		 2209 class_shift, hook) \
2210 __ADDRESSABLE(hook) \
2211 asm(".section " #sec ", \"a\" \n" \
2212 ".balign 16 \n" \
2213 ".short " #vendor ", " #device " \n" \
2214 ".long " #class ", " #class_shift " \n" \
2215 ".long " #hook " - . \n" \
2216 ".previous \n");
09a4e4d9
ST		 2217
2218/*
2219 * Clang's LTO may rename static functions in C, but has no way to
2220 * handle such renamings when referenced from inline asm. To work
2221 * around this, create global C stubs for these cases.
2222 */
2223#ifdef CONFIG_LTO_CLANG
2224#define __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
2225 class_shift, hook, stub) \
5659b598
ST		 2226 void stub(struct pci_dev *dev); \
2227 void stub(struct pci_dev *dev) \
09a4e4d9
ST		 2228 { \
2229 hook(dev); \
2230 } \
2231 ___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
2232 class_shift, stub)
2233#else
2234#define __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
2235 class_shift, hook, stub) \
2236 ___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
2237 class_shift, hook)
2238#endif
2239
c9d8b55f
AB		 2240#define DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
2241 class_shift, hook) \
2242 __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
09a4e4d9 2243 class_shift, hook, __UNIQUE_ID(hook))
c9d8b55f 2244#else
1da177e4 2245/* Anonymous variables would be nice... */
f4ca5c6a
YL		 2246#define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \
2247 class_shift, hook) \
ecf61c78 2248 static const struct pci_fixup __PASTE(__pci_fixup_##name,__LINE__) __used \
f4ca5c6a
YL		 2249 __attribute__((__section__(#section), aligned((sizeof(void *))))) \
2250 = { vendor, device, class, class_shift, hook };
c9d8b55f 2251#endif
f4ca5c6a
YL		 2252
2253#define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class, \
2254 class_shift, hook) \
2255 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
ecf61c78 2256 hook, vendor, device, class, class_shift, hook)
f4ca5c6a
YL		 2257#define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class, \
2258 class_shift, hook) \
2259 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
ecf61c78 2260 hook, vendor, device, class, class_shift, hook)
f4ca5c6a
YL		 2261#define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class, \
2262 class_shift, hook) \
2263 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
ecf61c78 2264 hook, vendor, device, class, class_shift, hook)
f4ca5c6a
YL		 2265#define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class, \
2266 class_shift, hook) \
2267 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
ecf61c78 2268 hook, vendor, device, class, class_shift, hook)
f4ca5c6a
YL		 2269#define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class, \
2270 class_shift, hook) \
2271 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
0aa0f5d1 2272 resume##hook, vendor, device, class, class_shift, hook)
f4ca5c6a
YL		 2273#define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class, \
2274 class_shift, hook) \
2275 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
0aa0f5d1 2276 resume_early##hook, vendor, device, class, class_shift, hook)
f4ca5c6a
YL		 2277#define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class, \
2278 class_shift, hook) \
2279 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
0aa0f5d1 2280 suspend##hook, vendor, device, class, class_shift, hook)
7d2a01b8
AN		 2281#define DECLARE_PCI_FIXUP_CLASS_SUSPEND_LATE(vendor, device, class, \
2282 class_shift, hook) \
2283 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
0aa0f5d1 2284 suspend_late##hook, vendor, device, class, class_shift, hook)
f4ca5c6a 2285
1da177e4
LT		 2286#define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
2287 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
ecf61c78 2288 hook, vendor, device, PCI_ANY_ID, 0, hook)
1da177e4
LT		 2289#define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
2290 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
ecf61c78 2291 hook, vendor, device, PCI_ANY_ID, 0, hook)
1da177e4
LT		 2292#define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
2293 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
ecf61c78 2294 hook, vendor, device, PCI_ANY_ID, 0, hook)
1da177e4
LT		 2295#define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
2296 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
ecf61c78 2297 hook, vendor, device, PCI_ANY_ID, 0, hook)
1597cacb
AC		 2298#define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
2299 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
0aa0f5d1 2300 resume##hook, vendor, device, PCI_ANY_ID, 0, hook)
e1a2a51e
RW		 2301#define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
2302 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
0aa0f5d1 2303 resume_early##hook, vendor, device, PCI_ANY_ID, 0, hook)
e1a2a51e
RW		 2304#define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
2305 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
0aa0f5d1 2306 suspend##hook, vendor, device, PCI_ANY_ID, 0, hook)
7d2a01b8
AN		 2307#define DECLARE_PCI_FIXUP_SUSPEND_LATE(vendor, device, hook) \
2308 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
0aa0f5d1 2309 suspend_late##hook, vendor, device, PCI_ANY_ID, 0, hook)
1da177e4 2310
93177a74 2311#ifdef CONFIG_PCI_QUIRKS
1da177e4 2312void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
93177a74
RW		 2313#else
2314static inline void pci_fixup_device(enum pci_fixup_pass pass,
2ee546c4 2315 struct pci_dev *dev) { }
93177a74 2316#endif
1da177e4 2317
05cca6e5 2318void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
5ea81769 2319void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
05cca6e5 2320void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
fb7ebfe4
YL		 2321int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name);
2322int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
916fbfb7 2323 const char *name);
fb7ebfe4 2324void pcim_iounmap_regions(struct pci_dev *pdev, int mask);
5ea81769 2325
1da177e4 2326extern int pci_pci_problems;
236561e5 2327#define PCIPCI_FAIL 1 /* No PCI PCI DMA */
1da177e4
LT		 2328#define PCIPCI_TRITON 2
2329#define PCIPCI_NATOMA 4
2330#define PCIPCI_VIAETBF 8
2331#define PCIPCI_VSFX 16
236561e5
AC		 2332#define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
2333#define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
1da177e4 2334
4516a618
AN		 2335extern unsigned long pci_cardbus_io_size;
2336extern unsigned long pci_cardbus_mem_size;
15856ad5 2337extern u8 pci_dfl_cache_line_size;
ac1aa47b 2338extern u8 pci_cache_line_size;
4516a618 2339
f7625980 2340/* Architecture-specific versions may override these (weak) */
19792a08 2341void pcibios_disable_device(struct pci_dev *dev);
cfce9fb8 2342void pcibios_set_master(struct pci_dev *dev);
19792a08
AB		 2343int pcibios_set_pcie_reset_state(struct pci_dev *dev,
2344 enum pcie_reset_state state);
06dc660e 2345int pcibios_device_add(struct pci_dev *dev);
6ae32c53 2346void pcibios_release_device(struct pci_dev *dev);
5d32a665 2347#ifdef CONFIG_PCI
a43ae58c 2348void pcibios_penalize_isa_irq(int irq, int active);
5d32a665
SK		 2349#else
2350static inline void pcibios_penalize_isa_irq(int irq, int active) {}
2351#endif
890e4847
JL		 2352int pcibios_alloc_irq(struct pci_dev *dev);
2353void pcibios_free_irq(struct pci_dev *dev);
619e6f34 2354resource_size_t pcibios_default_alignment(void);
575e3348 2355
87382ead
AB		 2356#if !defined(HAVE_PCI_MMAP) && !defined(ARCH_GENERIC_PCI_MMAP_RESOURCE)
2357extern int pci_create_resource_files(struct pci_dev *dev);
2358extern void pci_remove_resource_files(struct pci_dev *dev);
2359#endif
2360
935c760e 2361#if defined(CONFIG_PCI_MMCONFIG) || defined(CONFIG_ACPI_MCFG)
f39d5b72
BH		 2362void __init pci_mmcfg_early_init(void);
2363void __init pci_mmcfg_late_init(void);
7752d5cf 2364#else
bb63b421 2365static inline void pci_mmcfg_early_init(void) { }
7752d5cf
RH		 2366static inline void pci_mmcfg_late_init(void) { }
2367#endif
2368
642c92da 2369int pci_ext_cfg_avail(void);
0ef5f8f6 2370
1684f5dd 2371void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
c43996f4 2372void __iomem *pci_ioremap_wc_bar(struct pci_dev *pdev, int bar);
aa42d7c6 2373
dd7cc44d 2374#ifdef CONFIG_PCI_IOV
b07579c0
WY		 2375int pci_iov_virtfn_bus(struct pci_dev *dev, int id);
2376int pci_iov_virtfn_devfn(struct pci_dev *dev, int id);
21ca9fb6 2377int pci_iov_vf_id(struct pci_dev *dev);
a7e9f240 2378void *pci_iov_get_pf_drvdata(struct pci_dev *dev, struct pci_driver *pf_driver);
f39d5b72
BH		 2379int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
2380void pci_disable_sriov(struct pci_dev *dev);
a1ceea67
NS		 2381
2382int pci_iov_sysfs_link(struct pci_dev *dev, struct pci_dev *virtfn, int id);
753f6124
JS		 2383int pci_iov_add_virtfn(struct pci_dev *dev, int id);
2384void pci_iov_remove_virtfn(struct pci_dev *dev, int id);
f39d5b72 2385int pci_num_vf(struct pci_dev *dev);
5a8eb242 2386int pci_vfs_assigned(struct pci_dev *dev);
f39d5b72
BH		 2387int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs);
2388int pci_sriov_get_totalvfs(struct pci_dev *dev);
8effc395 2389int pci_sriov_configure_simple(struct pci_dev *dev, int nr_virtfn);
0e6c9122 2390resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno);
608c0d88 2391void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe);
619e6f34
MM		 2392
2393/* Arch may override these (weak) */
2394int pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs);
2395int pcibios_sriov_disable(struct pci_dev *pdev);
2396resource_size_t pcibios_iov_resource_alignment(struct pci_dev *dev, int resno);
dd7cc44d 2397#else
b07579c0
WY		 2398static inline int pci_iov_virtfn_bus(struct pci_dev *dev, int id)
2399{
2400 return -ENOSYS;
2401}
2402static inline int pci_iov_virtfn_devfn(struct pci_dev *dev, int id)
2403{
2404 return -ENOSYS;
2405}
21ca9fb6
JG		 2406
2407static inline int pci_iov_vf_id(struct pci_dev *dev)
2408{
2409 return -ENOSYS;
2410}
2411
a7e9f240
JG		 2412static inline void *pci_iov_get_pf_drvdata(struct pci_dev *dev,
2413 struct pci_driver *pf_driver)
2414{
2415 return ERR_PTR(-EINVAL);
2416}
2417
dd7cc44d 2418static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
2ee546c4 2419{ return -ENODEV; }
a1ceea67
NS		 2420
2421static inline int pci_iov_sysfs_link(struct pci_dev *dev,
2422 struct pci_dev *virtfn, int id)
2423{
2424 return -ENODEV;
2425}
753f6124 2426static inline int pci_iov_add_virtfn(struct pci_dev *dev, int id)
c194f7ea
WY		 2427{
2428 return -ENOSYS;
2429}
2430static inline void pci_iov_remove_virtfn(struct pci_dev *dev,
753f6124 2431 int id) { }
2ee546c4 2432static inline void pci_disable_sriov(struct pci_dev *dev) { }
2ee546c4 2433static inline int pci_num_vf(struct pci_dev *dev) { return 0; }
5a8eb242 2434static inline int pci_vfs_assigned(struct pci_dev *dev)
2ee546c4 2435{ return 0; }
bff73156 2436static inline int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs)
2ee546c4 2437{ return 0; }
bff73156 2438static inline int pci_sriov_get_totalvfs(struct pci_dev *dev)
2ee546c4 2439{ return 0; }
8effc395 2440#define pci_sriov_configure_simple NULL
0e6c9122
WY		 2441static inline resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno)
2442{ return 0; }
608c0d88 2443static inline void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe) { }
dd7cc44d
YZ		 2444#endif
2445
c825bc94 2446#if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
f39d5b72
BH		 2447void pci_hp_create_module_link(struct pci_slot *pci_slot);
2448void pci_hp_remove_module_link(struct pci_slot *pci_slot);
c825bc94
KK		 2449#endif
2450
d7b7e605
KK		 2451/**
2452 * pci_pcie_cap - get the saved PCIe capability offset
2453 * @dev: PCI device
2454 *
2455 * PCIe capability offset is calculated at PCI device initialization
2456 * time and saved in the data structure. This function returns saved
2457 * PCIe capability offset. Using this instead of pci_find_capability()
2458 * reduces unnecessary search in the PCI configuration space. If you
2459 * need to calculate PCIe capability offset from raw device for some
2460 * reasons, please use pci_find_capability() instead.
2461 */
2462static inline int pci_pcie_cap(struct pci_dev *dev)
2463{
2464 return dev->pcie_cap;
2465}
2466
7eb776c4
KK		 2467/**
2468 * pci_is_pcie - check if the PCI device is PCI Express capable
2469 * @dev: PCI device
2470 *
a895c28a 2471 * Returns: true if the PCI device is PCI Express capable, false otherwise.
7eb776c4
KK		 2472 */
2473static inline bool pci_is_pcie(struct pci_dev *dev)
2474{
a895c28a 2475 return pci_pcie_cap(dev);
7eb776c4
KK		 2476}
2477
7c9c003c
MS		 2478/**
2479 * pcie_caps_reg - get the PCIe Capabilities Register
2480 * @dev: PCI device
2481 */
2482static inline u16 pcie_caps_reg(const struct pci_dev *dev)
2483{
2484 return dev->pcie_flags_reg;
2485}
2486
786e2288
YW		 2487/**
2488 * pci_pcie_type - get the PCIe device/port type
2489 * @dev: PCI device
2490 */
2491static inline int pci_pcie_type(const struct pci_dev *dev)
2492{
1c531d82 2493 return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4;
786e2288
YW		 2494}
2495
6ae72bfa
YY		 2496/**
2497 * pcie_find_root_port - Get the PCIe root port device
2498 * @dev: PCI device
2499 *
2500 * Traverse up the parent chain and return the PCIe Root Port PCI Device
2501 * for a given PCI/PCIe Device.
2502 */
e784930b
JT		 2503static inline struct pci_dev *pcie_find_root_port(struct pci_dev *dev)
2504{
5396956c
MW		 2505 while (dev) {
2506 if (pci_is_pcie(dev) &&
2507 pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT)
2508 return dev;
2509 dev = pci_upstream_bridge(dev);
e784930b 2510 }
6ae72bfa 2511
e784930b
JT		 2512 return NULL;
2513}
2514
39714fd7
EZ		 2515static inline bool pci_dev_is_disconnected(const struct pci_dev *dev)
2516{
6613443f
IJ		 2517 /*
2518 * error_state is set in pci_dev_set_io_state() using xchg/cmpxchg()
2519 * and read w/o common lock. READ_ONCE() ensures compiler cannot cache
2520 * the value (e.g. inside the loop in pci_dev_wait()).
2521 */
2522 return READ_ONCE(dev->error_state) == pci_channel_io_perm_failure;
39714fd7
EZ		 2523}
2524
5d990b62 2525void pci_request_acs(void);
ad805758
AW		 2526bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags);
2527bool pci_acs_path_enabled(struct pci_dev *start,
2528 struct pci_dev *end, u16 acs_flags);
430a2368 2529int pci_enable_atomic_ops_to_root(struct pci_dev *dev, u32 cap_mask);
a2ce7662 2530
7ad506fa 2531#define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */
63ddc0b8 2532#define PCI_VPD_LRDT_ID(x) ((x) | PCI_VPD_LRDT)
7ad506fa
MC		 2533
2534/* Large Resource Data Type Tag Item Names */
2535#define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */
2536#define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */
2537#define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */
2538
2539#define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING)
2540#define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA)
2541#define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA)
2542
4067a854 2543#define PCI_VPD_RO_KEYWORD_PARTNO "PN"
16efafa3 2544#define PCI_VPD_RO_KEYWORD_SERIALNO "SN"
4067a854
MC		 2545#define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
2546#define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
d4894f3e 2547#define PCI_VPD_RO_KEYWORD_CHKSUM "RV"
4067a854 2548
a2ce7662 2549/**
76f3c032
HK		 2550 * pci_vpd_alloc - Allocate buffer and read VPD into it
2551 * @dev: PCI device
2552 * @size: pointer to field where VPD length is returned
9eb45d5c 2553 *
76f3c032 2554 * Returns pointer to allocated buffer or an ERR_PTR in case of failure
9eb45d5c 2555 */
76f3c032 2556void *pci_vpd_alloc(struct pci_dev *dev, unsigned int *size);
9eb45d5c 2557
e1d5bdab 2558/**
acfbb1b8
HK		 2559 * pci_vpd_find_id_string - Locate id string in VPD
2560 * @buf: Pointer to buffered VPD data
2561 * @len: The length of the buffer area in which to search
2562 * @size: Pointer to field where length of id string is returned
e1d5bdab 2563 *
acfbb1b8 2564 * Returns the index of the id string or -ENOENT if not found.
e1d5bdab 2565 */
acfbb1b8 2566int pci_vpd_find_id_string(const u8 *buf, unsigned int len, unsigned int *size);
e1d5bdab 2567
b55ac1b2 2568/**
9e515c9f
HK		 2569 * pci_vpd_find_ro_info_keyword - Locate info field keyword in VPD RO section
2570 * @buf: Pointer to buffered VPD data
2571 * @len: The length of the buffer area in which to search
2572 * @kw: The keyword to search for
2573 * @size: Pointer to field where length of found keyword data is returned
b55ac1b2 2574 *
9e515c9f
HK		 2575 * Returns the index of the information field keyword data or -ENOENT if
2576 * not found.
b55ac1b2 2577 */
9e515c9f
HK		 2578int pci_vpd_find_ro_info_keyword(const void *buf, unsigned int len,
2579 const char *kw, unsigned int *size);
b55ac1b2 2580
4067a854 2581/**
6107e5cb
HK		 2582 * pci_vpd_check_csum - Check VPD checksum
2583 * @buf: Pointer to buffered VPD data
2584 * @len: VPD size
4067a854 2585 *
6107e5cb 2586 * Returns 1 if VPD has no checksum, otherwise 0 or an errno
4067a854 2587 */
6107e5cb 2588int pci_vpd_check_csum(const void *buf, unsigned int len);
4067a854 2589
98d9f30c
BH		 2590/* PCI <-> OF binding helpers */
2591#ifdef CONFIG_OF
2592struct device_node;
b165e2b6 2593struct irq_domain;
b165e2b6 2594struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus);
85aabbd7 2595bool pci_host_of_has_msi_map(struct device *dev);
98d9f30c
BH		 2596
2597/* Arch may override this (weak) */
723ec4d0 2598struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus);
98d9f30c 2599
0aa0f5d1 2600#else /* CONFIG_OF */
b165e2b6
MZ		 2601static inline struct irq_domain *
2602pci_host_bridge_of_msi_domain(struct pci_bus *bus) { return NULL; }
85aabbd7 2603static inline bool pci_host_of_has_msi_map(struct device *dev) { return false; }
98d9f30c
BH		 2604#endif /* CONFIG_OF */
2605
ad32eb2d
BM		 2606static inline struct device_node *
2607pci_device_to_OF_node(const struct pci_dev *pdev)
2608{
2609 return pdev ? pdev->dev.of_node : NULL;
2610}
2611
2612static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
2613{
2614 return bus ? bus->dev.of_node : NULL;
2615}
2616
471036b2
SS		 2617#ifdef CONFIG_ACPI
2618struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus);
2619
2620void
2621pci_msi_register_fwnode_provider(struct fwnode_handle *(*fn)(struct device *));
52525b7a 2622bool pci_pr3_present(struct pci_dev *pdev);
471036b2
SS		 2623#else
2624static inline struct irq_domain *
2625pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) { return NULL; }
46b4bff6 2626static inline bool pci_pr3_present(struct pci_dev *pdev) { return false; }
471036b2
SS		 2627#endif
2628
eb740b5f
GS		 2629#ifdef CONFIG_EEH
2630static inline struct eeh_dev *pci_dev_to_eeh_dev(struct pci_dev *pdev)
2631{
2632 return pdev->dev.archdata.edev;
2633}
2634#endif
2635
09298542 2636void pci_add_dma_alias(struct pci_dev *dev, u8 devfn_from, unsigned nr_devfns);
338c3149 2637bool pci_devs_are_dma_aliases(struct pci_dev *dev1, struct pci_dev *dev2);
c25dc828
AW		 2638int pci_for_each_dma_alias(struct pci_dev *pdev,
2639 int (*fn)(struct pci_dev *pdev,
2640 u16 alias, void *data), void *data);
2641
0aa0f5d1 2642/* Helper functions for operation of device flag */
ce052984
EZ		 2643static inline void pci_set_dev_assigned(struct pci_dev *pdev)
2644{
2645 pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED;
2646}
2647static inline void pci_clear_dev_assigned(struct pci_dev *pdev)
2648{
2649 pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
2650}
2651static inline bool pci_is_dev_assigned(struct pci_dev *pdev)
2652{
2653 return (pdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED) == PCI_DEV_FLAGS_ASSIGNED;
2654}
19bdb6e4
AW		 2655
2656/**
2657 * pci_ari_enabled - query ARI forwarding status
2658 * @bus: the PCI bus
2659 *
2660 * Returns true if ARI forwarding is enabled.
2661 */
2662static inline bool pci_ari_enabled(struct pci_bus *bus)
2663{
2664 return bus->self && bus->self->ari_enabled;
2665}
bc4b024a 2666
8531e283
LW		 2667/**
2668 * pci_is_thunderbolt_attached - whether device is on a Thunderbolt daisy chain
2669 * @pdev: PCI device to check
2670 *
2671 * Walk upwards from @pdev and check for each encountered bridge if it's part
2672 * of a Thunderbolt controller. Reaching the host bridge means @pdev is not
2673 * Thunderbolt-attached. (But rather soldered to the mainboard usually.)
2674 */
2675static inline bool pci_is_thunderbolt_attached(struct pci_dev *pdev)
2676{
2677 struct pci_dev *parent = pdev;
2678
2679 if (pdev->is_thunderbolt)
2680 return true;
2681
2682 while ((parent = pci_upstream_bridge(parent)))
2683 if (parent->is_thunderbolt)
2684 return true;
2685
2686 return false;
2687}
2688
2e28bc84 2689#if defined(CONFIG_PCIEPORTBUS) || defined(CONFIG_EEH)
3ecac020
ME		 2690void pci_uevent_ers(struct pci_dev *pdev, enum pci_ers_result err_type);
2691#endif
856e1eb9 2692
79687789 2693#include <linux/dma-mapping.h>
bc4b024a 2694
7506dc79
FL		 2695#define pci_printk(level, pdev, fmt, arg...) \
2696 dev_printk(level, &(pdev)->dev, fmt, ##arg)
2697
2698#define pci_emerg(pdev, fmt, arg...) dev_emerg(&(pdev)->dev, fmt, ##arg)
2699#define pci_alert(pdev, fmt, arg...) dev_alert(&(pdev)->dev, fmt, ##arg)
2700#define pci_crit(pdev, fmt, arg...) dev_crit(&(pdev)->dev, fmt, ##arg)
2701#define pci_err(pdev, fmt, arg...) dev_err(&(pdev)->dev, fmt, ##arg)
2702#define pci_warn(pdev, fmt, arg...) dev_warn(&(pdev)->dev, fmt, ##arg)
27829479 2703#define pci_warn_once(pdev, fmt, arg...) dev_warn_once(&(pdev)->dev, fmt, ##arg)
7506dc79
FL		 2704#define pci_notice(pdev, fmt, arg...) dev_notice(&(pdev)->dev, fmt, ##arg)
2705#define pci_info(pdev, fmt, arg...) dev_info(&(pdev)->dev, fmt, ##arg)
2706#define pci_dbg(pdev, fmt, arg...) dev_dbg(&(pdev)->dev, fmt, ##arg)
2707
a88a7b3e
BH		 2708#define pci_notice_ratelimited(pdev, fmt, arg...) \
2709 dev_notice_ratelimited(&(pdev)->dev, fmt, ##arg)
2710
7f1c62c4
KW		 2711#define pci_info_ratelimited(pdev, fmt, arg...) \
2712 dev_info_ratelimited(&(pdev)->dev, fmt, ##arg)
2713
12bcae44
BH		 2714#define pci_WARN(pdev, condition, fmt, arg...) \
2715 WARN(condition, "%s %s: " fmt, \
2716 dev_driver_string(&(pdev)->dev), pci_name(pdev), ##arg)
2717
2718#define pci_WARN_ONCE(pdev, condition, fmt, arg...) \
2719 WARN_ONCE(condition, "%s %s: " fmt, \
2720 dev_driver_string(&(pdev)->dev), pci_name(pdev), ##arg)
2721
1da177e4 2722#endif /* LINUX_PCI_H */
Linux 6.x block layer and io_uring tree(s)