1 /* SPDX-License-Identifier: GPL-2.0 */
5 * PCI defines and function prototypes
6 * Copyright 1994, Drew Eckhardt
9 * PCI Express ASPM defines and function prototypes
10 * Copyright (c) 2007 Intel Corp.
14 * For more information, please consult the following manuals (look at
15 * http://www.pcisig.com/ for how to get them):
17 * PCI BIOS Specification
18 * PCI Local Bus Specification
19 * PCI to PCI Bridge Specification
20 * PCI Express Specification
21 * PCI System Design Guide
27 #include <linux/mod_devicetable.h>
29 #include <linux/types.h>
30 #include <linux/init.h>
31 #include <linux/ioport.h>
32 #include <linux/list.h>
33 #include <linux/compiler.h>
34 #include <linux/errno.h>
35 #include <linux/kobject.h>
36 #include <linux/atomic.h>
37 #include <linux/device.h>
38 #include <linux/interrupt.h>
40 #include <linux/resource_ext.h>
41 #include <uapi/linux/pci.h>
43 #include <linux/pci_ids.h>
45 #define PCI_STATUS_ERROR_BITS (PCI_STATUS_DETECTED_PARITY | \
46 PCI_STATUS_SIG_SYSTEM_ERROR | \
47 PCI_STATUS_REC_MASTER_ABORT | \
48 PCI_STATUS_REC_TARGET_ABORT | \
49 PCI_STATUS_SIG_TARGET_ABORT | \
52 /* Number of reset methods used in pci_reset_fn_methods array in pci.c */
53 #define PCI_NUM_RESET_METHODS 7
55 #define PCI_RESET_PROBE true
56 #define PCI_RESET_DO_RESET false
59 * The PCI interface treats multi-function devices as independent
60 * devices. The slot/function address of each device is encoded
61 * in a single byte as follows:
66 * PCI_DEVFN(), PCI_SLOT(), and PCI_FUNC() are defined in uapi/linux/pci.h.
67 * In the interest of not exposing interfaces to user-space unnecessarily,
68 * the following kernel-only defines are being added here.
70 #define PCI_DEVID(bus, devfn) ((((u16)(bus)) << 8) | (devfn))
71 /* return bus from PCI devid = ((u16)bus_number) << 8) | devfn */
72 #define PCI_BUS_NUM(x) (((x) >> 8) & 0xff)
74 /* pci_slot represents a physical slot */
76 struct pci_bus *bus; /* Bus this slot is on */
77 struct list_head list; /* Node in list of slots */
78 struct hotplug_slot *hotplug; /* Hotplug info (move here) */
79 unsigned char number; /* PCI_SLOT(pci_dev->devfn) */
83 static inline const char *pci_slot_name(const struct pci_slot *slot)
85 return kobject_name(&slot->kobj);
88 /* File state for mmap()s on /proc/bus/pci/X/Y */
94 /* For PCI devices, the region numbers are assigned this way: */
96 /* #0-5: standard PCI resources */
98 PCI_STD_RESOURCE_END = PCI_STD_RESOURCES + PCI_STD_NUM_BARS - 1,
100 /* #6: expansion ROM resource */
103 /* Device-specific resources */
104 #ifdef CONFIG_PCI_IOV
106 PCI_IOV_RESOURCE_END = PCI_IOV_RESOURCES + PCI_SRIOV_NUM_BARS - 1,
109 /* PCI-to-PCI (P2P) bridge windows */
110 #define PCI_BRIDGE_IO_WINDOW (PCI_BRIDGE_RESOURCES + 0)
111 #define PCI_BRIDGE_MEM_WINDOW (PCI_BRIDGE_RESOURCES + 1)
112 #define PCI_BRIDGE_PREF_MEM_WINDOW (PCI_BRIDGE_RESOURCES + 2)
114 /* CardBus bridge windows */
115 #define PCI_CB_BRIDGE_IO_0_WINDOW (PCI_BRIDGE_RESOURCES + 0)
116 #define PCI_CB_BRIDGE_IO_1_WINDOW (PCI_BRIDGE_RESOURCES + 1)
117 #define PCI_CB_BRIDGE_MEM_0_WINDOW (PCI_BRIDGE_RESOURCES + 2)
118 #define PCI_CB_BRIDGE_MEM_1_WINDOW (PCI_BRIDGE_RESOURCES + 3)
120 /* Total number of bridge resources for P2P and CardBus */
121 #define PCI_BRIDGE_RESOURCE_NUM 4
123 /* Resources assigned to buses behind the bridge */
124 PCI_BRIDGE_RESOURCES,
125 PCI_BRIDGE_RESOURCE_END = PCI_BRIDGE_RESOURCES +
126 PCI_BRIDGE_RESOURCE_NUM - 1,
128 /* Total resources associated with a PCI device */
131 /* Preserve this for compatibility */
132 DEVICE_COUNT_RESOURCE = PCI_NUM_RESOURCES,
136 * enum pci_interrupt_pin - PCI INTx interrupt values
137 * @PCI_INTERRUPT_UNKNOWN: Unknown or unassigned interrupt
138 * @PCI_INTERRUPT_INTA: PCI INTA pin
139 * @PCI_INTERRUPT_INTB: PCI INTB pin
140 * @PCI_INTERRUPT_INTC: PCI INTC pin
141 * @PCI_INTERRUPT_INTD: PCI INTD pin
143 * Corresponds to values for legacy PCI INTx interrupts, as can be found in the
144 * PCI_INTERRUPT_PIN register.
146 enum pci_interrupt_pin {
147 PCI_INTERRUPT_UNKNOWN,
154 /* The number of legacy PCI INTx interrupts */
155 #define PCI_NUM_INTX 4
158 * pci_power_t values must match the bits in the Capabilities PME_Support
159 * and Control/Status PowerState fields in the Power Management capability.
161 typedef int __bitwise pci_power_t;
163 #define PCI_D0 ((pci_power_t __force) 0)
164 #define PCI_D1 ((pci_power_t __force) 1)
165 #define PCI_D2 ((pci_power_t __force) 2)
166 #define PCI_D3hot ((pci_power_t __force) 3)
167 #define PCI_D3cold ((pci_power_t __force) 4)
168 #define PCI_UNKNOWN ((pci_power_t __force) 5)
169 #define PCI_POWER_ERROR ((pci_power_t __force) -1)
171 /* Remember to update this when the list above changes! */
172 extern const char *pci_power_names[];
174 static inline const char *pci_power_name(pci_power_t state)
176 return pci_power_names[1 + (__force int) state];
180 * typedef pci_channel_state_t
182 * The pci_channel state describes connectivity between the CPU and
183 * the PCI device. If some PCI bus between here and the PCI device
184 * has crashed or locked up, this info is reflected here.
186 typedef unsigned int __bitwise pci_channel_state_t;
189 /* I/O channel is in normal state */
190 pci_channel_io_normal = (__force pci_channel_state_t) 1,
192 /* I/O to channel is blocked */
193 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
195 /* PCI card is dead */
196 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
199 typedef unsigned int __bitwise pcie_reset_state_t;
201 enum pcie_reset_state {
202 /* Reset is NOT asserted (Use to deassert reset) */
203 pcie_deassert_reset = (__force pcie_reset_state_t) 1,
205 /* Use #PERST to reset PCIe device */
206 pcie_warm_reset = (__force pcie_reset_state_t) 2,
208 /* Use PCIe Hot Reset to reset device */
209 pcie_hot_reset = (__force pcie_reset_state_t) 3
212 typedef unsigned short __bitwise pci_dev_flags_t;
214 /* INTX_DISABLE in PCI_COMMAND register disables MSI too */
215 PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) (1 << 0),
216 /* Device configuration is irrevocably lost if disabled into D3 */
217 PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) (1 << 1),
218 /* Provide indication device is assigned by a Virtual Machine Manager */
219 PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) (1 << 2),
220 /* Flag for quirk use to store if quirk-specific ACS is enabled */
221 PCI_DEV_FLAGS_ACS_ENABLED_QUIRK = (__force pci_dev_flags_t) (1 << 3),
222 /* Use a PCIe-to-PCI bridge alias even if !pci_is_pcie */
223 PCI_DEV_FLAG_PCIE_BRIDGE_ALIAS = (__force pci_dev_flags_t) (1 << 5),
224 /* Do not use bus resets for device */
225 PCI_DEV_FLAGS_NO_BUS_RESET = (__force pci_dev_flags_t) (1 << 6),
226 /* Do not use PM reset even if device advertises NoSoftRst- */
227 PCI_DEV_FLAGS_NO_PM_RESET = (__force pci_dev_flags_t) (1 << 7),
228 /* Get VPD from function 0 VPD */
229 PCI_DEV_FLAGS_VPD_REF_F0 = (__force pci_dev_flags_t) (1 << 8),
230 /* A non-root bridge where translation occurs, stop alias search here */
231 PCI_DEV_FLAGS_BRIDGE_XLATE_ROOT = (__force pci_dev_flags_t) (1 << 9),
232 /* Do not use FLR even if device advertises PCI_AF_CAP */
233 PCI_DEV_FLAGS_NO_FLR_RESET = (__force pci_dev_flags_t) (1 << 10),
234 /* Don't use Relaxed Ordering for TLPs directed at this device */
235 PCI_DEV_FLAGS_NO_RELAXED_ORDERING = (__force pci_dev_flags_t) (1 << 11),
236 /* Device does honor MSI masking despite saying otherwise */
237 PCI_DEV_FLAGS_HAS_MSI_MASKING = (__force pci_dev_flags_t) (1 << 12),
240 enum pci_irq_reroute_variant {
241 INTEL_IRQ_REROUTE_VARIANT = 1,
242 MAX_IRQ_REROUTE_VARIANTS = 3
245 typedef unsigned short __bitwise pci_bus_flags_t;
247 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
248 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
249 PCI_BUS_FLAGS_NO_AERSID = (__force pci_bus_flags_t) 4,
250 PCI_BUS_FLAGS_NO_EXTCFG = (__force pci_bus_flags_t) 8,
253 /* Values from Link Status register, PCIe r3.1, sec 7.8.8 */
254 enum pcie_link_width {
255 PCIE_LNK_WIDTH_RESRV = 0x00,
263 PCIE_LNK_WIDTH_UNKNOWN = 0xff,
266 /* See matching string table in pci_speed_string() */
268 PCI_SPEED_33MHz = 0x00,
269 PCI_SPEED_66MHz = 0x01,
270 PCI_SPEED_66MHz_PCIX = 0x02,
271 PCI_SPEED_100MHz_PCIX = 0x03,
272 PCI_SPEED_133MHz_PCIX = 0x04,
273 PCI_SPEED_66MHz_PCIX_ECC = 0x05,
274 PCI_SPEED_100MHz_PCIX_ECC = 0x06,
275 PCI_SPEED_133MHz_PCIX_ECC = 0x07,
276 PCI_SPEED_66MHz_PCIX_266 = 0x09,
277 PCI_SPEED_100MHz_PCIX_266 = 0x0a,
278 PCI_SPEED_133MHz_PCIX_266 = 0x0b,
284 PCI_SPEED_66MHz_PCIX_533 = 0x11,
285 PCI_SPEED_100MHz_PCIX_533 = 0x12,
286 PCI_SPEED_133MHz_PCIX_533 = 0x13,
287 PCIE_SPEED_2_5GT = 0x14,
288 PCIE_SPEED_5_0GT = 0x15,
289 PCIE_SPEED_8_0GT = 0x16,
290 PCIE_SPEED_16_0GT = 0x17,
291 PCIE_SPEED_32_0GT = 0x18,
292 PCIE_SPEED_64_0GT = 0x19,
293 PCI_SPEED_UNKNOWN = 0xff,
296 enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev);
297 enum pcie_link_width pcie_get_width_cap(struct pci_dev *dev);
306 struct pcie_link_state;
311 /* The pci_dev structure describes PCI devices */
313 struct list_head bus_list; /* Node in per-bus list */
314 struct pci_bus *bus; /* Bus this device is on */
315 struct pci_bus *subordinate; /* Bus this device bridges to */
317 void *sysdata; /* Hook for sys-specific extension */
318 struct proc_dir_entry *procent; /* Device entry in /proc/bus/pci */
319 struct pci_slot *slot; /* Physical slot this device is in */
321 unsigned int devfn; /* Encoded device & function index */
322 unsigned short vendor;
323 unsigned short device;
324 unsigned short subsystem_vendor;
325 unsigned short subsystem_device;
326 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
327 u8 revision; /* PCI revision, low byte of class word */
328 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
329 #ifdef CONFIG_PCIEAER
330 u16 aer_cap; /* AER capability offset */
331 struct aer_stats *aer_stats; /* AER stats for this device */
333 #ifdef CONFIG_PCIEPORTBUS
334 struct rcec_ea *rcec_ea; /* RCEC cached endpoint association */
335 struct pci_dev *rcec; /* Associated RCEC device */
337 u32 devcap; /* PCIe Device Capabilities */
338 u8 pcie_cap; /* PCIe capability offset */
339 u8 msi_cap; /* MSI capability offset */
340 u8 msix_cap; /* MSI-X capability offset */
341 u8 pcie_mpss:3; /* PCIe Max Payload Size Supported */
342 u8 rom_base_reg; /* Config register controlling ROM */
343 u8 pin; /* Interrupt pin this device uses */
344 u16 pcie_flags_reg; /* Cached PCIe Capabilities Register */
345 unsigned long *dma_alias_mask;/* Mask of enabled devfn aliases */
347 struct pci_driver *driver; /* Driver bound to this device */
348 u64 dma_mask; /* Mask of the bits of bus address this
349 device implements. Normally this is
350 0xffffffff. You only need to change
351 this if your device has broken DMA
352 or supports 64-bit transfers. */
354 struct device_dma_parameters dma_parms;
356 pci_power_t current_state; /* Current operating state. In ACPI,
357 this is D0-D3, D0 being fully
358 functional, and D3 being off. */
359 unsigned int imm_ready:1; /* Supports Immediate Readiness */
360 u8 pm_cap; /* PM capability offset */
361 unsigned int pme_support:5; /* Bitmask of states from which PME#
363 unsigned int pme_poll:1; /* Poll device's PME status bit */
364 unsigned int d1_support:1; /* Low power state D1 is supported */
365 unsigned int d2_support:1; /* Low power state D2 is supported */
366 unsigned int no_d1d2:1; /* D1 and D2 are forbidden */
367 unsigned int no_d3cold:1; /* D3cold is forbidden */
368 unsigned int bridge_d3:1; /* Allow D3 for bridge */
369 unsigned int d3cold_allowed:1; /* D3cold is allowed by user */
370 unsigned int mmio_always_on:1; /* Disallow turning off io/mem
371 decoding during BAR sizing */
372 unsigned int wakeup_prepared:1;
373 unsigned int runtime_d3cold:1; /* Whether go through runtime
374 D3cold, not set for devices
375 powered on/off by the
376 corresponding bridge */
377 unsigned int skip_bus_pm:1; /* Internal: Skip bus-level PM */
378 unsigned int ignore_hotplug:1; /* Ignore hotplug events */
379 unsigned int hotplug_user_indicators:1; /* SlotCtl indicators
380 controlled exclusively by
382 unsigned int clear_retrain_link:1; /* Need to clear Retrain Link
384 unsigned int d3hot_delay; /* D3hot->D0 transition time in ms */
385 unsigned int d3cold_delay; /* D3cold->D0 transition time in ms */
387 #ifdef CONFIG_PCIEASPM
388 struct pcie_link_state *link_state; /* ASPM link state */
389 unsigned int ltr_path:1; /* Latency Tolerance Reporting
390 supported from root to here */
391 u16 l1ss; /* L1SS Capability pointer */
393 unsigned int pasid_no_tlp:1; /* PASID works without TLP Prefix */
394 unsigned int eetlp_prefix_path:1; /* End-to-End TLP Prefix */
396 pci_channel_state_t error_state; /* Current connectivity state */
397 struct device dev; /* Generic device interface */
399 int cfg_size; /* Size of config space */
402 * Instead of touching interrupt line and base address registers
403 * directly, use the values stored here. They might be different!
406 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
408 bool match_driver; /* Skip attaching driver */
410 unsigned int transparent:1; /* Subtractive decode bridge */
411 unsigned int io_window:1; /* Bridge has I/O window */
412 unsigned int pref_window:1; /* Bridge has pref mem window */
413 unsigned int pref_64_window:1; /* Pref mem window is 64-bit */
414 unsigned int multifunction:1; /* Multi-function device */
416 unsigned int is_busmaster:1; /* Is busmaster */
417 unsigned int no_msi:1; /* May not use MSI */
418 unsigned int no_64bit_msi:1; /* May only use 32-bit MSIs */
419 unsigned int block_cfg_access:1; /* Config space access blocked */
420 unsigned int broken_parity_status:1; /* Generates false positive parity */
421 unsigned int irq_reroute_variant:2; /* Needs IRQ rerouting variant */
422 unsigned int msi_enabled:1;
423 unsigned int msix_enabled:1;
424 unsigned int ari_enabled:1; /* ARI forwarding */
425 unsigned int ats_enabled:1; /* Address Translation Svc */
426 unsigned int pasid_enabled:1; /* Process Address Space ID */
427 unsigned int pri_enabled:1; /* Page Request Interface */
428 unsigned int is_managed:1; /* Managed via devres */
429 unsigned int is_msi_managed:1; /* MSI release via devres installed */
430 unsigned int needs_freset:1; /* Requires fundamental reset */
431 unsigned int state_saved:1;
432 unsigned int is_physfn:1;
433 unsigned int is_virtfn:1;
434 unsigned int is_hotplug_bridge:1;
435 unsigned int shpc_managed:1; /* SHPC owned by shpchp */
436 unsigned int is_thunderbolt:1; /* Thunderbolt controller */
438 * Devices marked being untrusted are the ones that can potentially
439 * execute DMA attacks and similar. They are typically connected
440 * through external ports such as Thunderbolt but not limited to
441 * that. When an IOMMU is enabled they should be getting full
442 * mappings to make sure they cannot access arbitrary memory.
444 unsigned int untrusted:1;
446 * Info from the platform, e.g., ACPI or device tree, may mark a
447 * device as "external-facing". An external-facing device is
448 * itself internal but devices downstream from it are external.
450 unsigned int external_facing:1;
451 unsigned int broken_intx_masking:1; /* INTx masking can't be used */
452 unsigned int io_window_1k:1; /* Intel bridge 1K I/O windows */
453 unsigned int irq_managed:1;
454 unsigned int non_compliant_bars:1; /* Broken BARs; ignore them */
455 unsigned int is_probed:1; /* Device probing in progress */
456 unsigned int link_active_reporting:1;/* Device capable of reporting link active */
457 unsigned int no_vf_scan:1; /* Don't scan for VFs after IOV enablement */
458 unsigned int no_command_memory:1; /* No PCI_COMMAND_MEMORY */
459 pci_dev_flags_t dev_flags;
460 atomic_t enable_cnt; /* pci_enable_device has been called */
462 u32 saved_config_space[16]; /* Config space saved at suspend time */
463 struct hlist_head saved_cap_space;
464 int rom_attr_enabled; /* Display of ROM attribute enabled? */
465 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
466 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
468 #ifdef CONFIG_HOTPLUG_PCI_PCIE
469 unsigned int broken_cmd_compl:1; /* No compl for some cmds */
471 #ifdef CONFIG_PCIE_PTM
472 unsigned int ptm_root:1;
473 unsigned int ptm_enabled:1;
476 #ifdef CONFIG_PCI_MSI
477 void __iomem *msix_base;
478 raw_spinlock_t msi_lock;
481 #ifdef CONFIG_PCIE_DPC
483 unsigned int dpc_rp_extensions:1;
486 #ifdef CONFIG_PCI_ATS
488 struct pci_sriov *sriov; /* PF: SR-IOV info */
489 struct pci_dev *physfn; /* VF: related PF */
491 u16 ats_cap; /* ATS Capability offset */
492 u8 ats_stu; /* ATS Smallest Translation Unit */
494 #ifdef CONFIG_PCI_PRI
495 u16 pri_cap; /* PRI Capability offset */
496 u32 pri_reqs_alloc; /* Number of PRI requests allocated */
497 unsigned int pasid_required:1; /* PRG Response PASID Required */
499 #ifdef CONFIG_PCI_PASID
500 u16 pasid_cap; /* PASID Capability offset */
503 #ifdef CONFIG_PCI_P2PDMA
504 struct pci_p2pdma __rcu *p2pdma;
506 u16 acs_cap; /* ACS Capability offset */
507 phys_addr_t rom; /* Physical address if not from BAR */
508 size_t romlen; /* Length if not from BAR */
509 char *driver_override; /* Driver name to force a match */
511 unsigned long priv_flags; /* Private flags for the PCI driver */
513 /* These methods index pci_reset_fn_methods[] */
514 u8 reset_methods[PCI_NUM_RESET_METHODS]; /* In priority order */
517 static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
519 #ifdef CONFIG_PCI_IOV
526 struct pci_dev *pci_alloc_dev(struct pci_bus *bus);
528 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
529 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
531 static inline int pci_channel_offline(struct pci_dev *pdev)
533 return (pdev->error_state != pci_channel_io_normal);
537 * Currently in ACPI spec, for each PCI host bridge, PCI Segment
538 * Group number is limited to a 16-bit value, therefore (int)-1 is
539 * not a valid PCI domain number, and can be used as a sentinel
540 * value indicating ->domain_nr is not set by the driver (and
541 * CONFIG_PCI_DOMAINS_GENERIC=y archs will set it with
542 * pci_bus_find_domain_nr()).
544 #define PCI_DOMAIN_NR_NOT_SET (-1)
546 struct pci_host_bridge {
548 struct pci_bus *bus; /* Root bus */
550 struct pci_ops *child_ops;
554 struct list_head windows; /* resource_entry */
555 struct list_head dma_ranges; /* dma ranges resource list */
556 u8 (*swizzle_irq)(struct pci_dev *, u8 *); /* Platform IRQ swizzler */
557 int (*map_irq)(const struct pci_dev *, u8, u8);
558 void (*release_fn)(struct pci_host_bridge *);
560 unsigned int ignore_reset_delay:1; /* For entire hierarchy */
561 unsigned int no_ext_tags:1; /* No Extended Tags */
562 unsigned int native_aer:1; /* OS may use PCIe AER */
563 unsigned int native_pcie_hotplug:1; /* OS may use PCIe hotplug */
564 unsigned int native_shpc_hotplug:1; /* OS may use SHPC hotplug */
565 unsigned int native_pme:1; /* OS may use PCIe PME */
566 unsigned int native_ltr:1; /* OS may use PCIe LTR */
567 unsigned int native_dpc:1; /* OS may use PCIe DPC */
568 unsigned int preserve_config:1; /* Preserve FW resource setup */
569 unsigned int size_windows:1; /* Enable root bus sizing */
570 unsigned int msi_domain:1; /* Bridge wants MSI domain */
572 /* Resource alignment requirements */
573 resource_size_t (*align_resource)(struct pci_dev *dev,
574 const struct resource *res,
575 resource_size_t start,
576 resource_size_t size,
577 resource_size_t align);
578 unsigned long private[] ____cacheline_aligned;
581 #define to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev)
583 static inline void *pci_host_bridge_priv(struct pci_host_bridge *bridge)
585 return (void *)bridge->private;
588 static inline struct pci_host_bridge *pci_host_bridge_from_priv(void *priv)
590 return container_of(priv, struct pci_host_bridge, private);
593 struct pci_host_bridge *pci_alloc_host_bridge(size_t priv);
594 struct pci_host_bridge *devm_pci_alloc_host_bridge(struct device *dev,
596 void pci_free_host_bridge(struct pci_host_bridge *bridge);
597 struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus);
599 void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
600 void (*release_fn)(struct pci_host_bridge *),
603 int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge);
606 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
607 * to P2P or CardBus bridge windows) go in a table. Additional ones (for
608 * buses below host bridges or subtractive decode bridges) go in the list.
609 * Use pci_bus_for_each_resource() to iterate through all the resources.
613 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly
614 * and there's no way to program the bridge with the details of the window.
615 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive-
616 * decode bit set, because they are explicit and can be programmed with _SRS.
618 #define PCI_SUBTRACTIVE_DECODE 0x1
620 struct pci_bus_resource {
621 struct list_head list;
622 struct resource *res;
626 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
629 struct list_head node; /* Node in list of buses */
630 struct pci_bus *parent; /* Parent bus this bridge is on */
631 struct list_head children; /* List of child buses */
632 struct list_head devices; /* List of devices on this bus */
633 struct pci_dev *self; /* Bridge device as seen by parent */
634 struct list_head slots; /* List of slots on this bus;
635 protected by pci_slot_mutex */
636 struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
637 struct list_head resources; /* Address space routed to this bus */
638 struct resource busn_res; /* Bus numbers routed to this bus */
640 struct pci_ops *ops; /* Configuration access functions */
641 void *sysdata; /* Hook for sys-specific extension */
642 struct proc_dir_entry *procdir; /* Directory entry in /proc/bus/pci */
644 unsigned char number; /* Bus number */
645 unsigned char primary; /* Number of primary bridge */
646 unsigned char max_bus_speed; /* enum pci_bus_speed */
647 unsigned char cur_bus_speed; /* enum pci_bus_speed */
648 #ifdef CONFIG_PCI_DOMAINS_GENERIC
654 unsigned short bridge_ctl; /* Manage NO_ISA/FBB/et al behaviors */
655 pci_bus_flags_t bus_flags; /* Inherited by child buses */
656 struct device *bridge;
658 struct bin_attribute *legacy_io; /* Legacy I/O for this bus */
659 struct bin_attribute *legacy_mem; /* Legacy mem */
660 unsigned int is_added:1;
663 #define to_pci_bus(n) container_of(n, struct pci_bus, dev)
665 static inline u16 pci_dev_id(struct pci_dev *dev)
667 return PCI_DEVID(dev->bus->number, dev->devfn);
671 * Returns true if the PCI bus is root (behind host-PCI bridge),
674 * Some code assumes that "bus->self == NULL" means that bus is a root bus.
675 * This is incorrect because "virtual" buses added for SR-IOV (via
676 * virtfn_add_bus()) have "bus->self == NULL" but are not root buses.
678 static inline bool pci_is_root_bus(struct pci_bus *pbus)
680 return !(pbus->parent);
684 * pci_is_bridge - check if the PCI device is a bridge
687 * Return true if the PCI device is bridge whether it has subordinate
690 static inline bool pci_is_bridge(struct pci_dev *dev)
692 return dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
693 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS;
696 #define for_each_pci_bridge(dev, bus) \
697 list_for_each_entry(dev, &bus->devices, bus_list) \
698 if (!pci_is_bridge(dev)) {} else
700 static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev)
702 dev = pci_physfn(dev);
703 if (pci_is_root_bus(dev->bus))
706 return dev->bus->self;
709 #ifdef CONFIG_PCI_MSI
710 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
712 return pci_dev->msi_enabled || pci_dev->msix_enabled;
715 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
718 /* Error values that may be returned by PCI functions */
719 #define PCIBIOS_SUCCESSFUL 0x00
720 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
721 #define PCIBIOS_BAD_VENDOR_ID 0x83
722 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
723 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
724 #define PCIBIOS_SET_FAILED 0x88
725 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
727 /* Translate above to generic errno for passing back through non-PCI code */
728 static inline int pcibios_err_to_errno(int err)
730 if (err <= PCIBIOS_SUCCESSFUL)
731 return err; /* Assume already errno */
734 case PCIBIOS_FUNC_NOT_SUPPORTED:
736 case PCIBIOS_BAD_VENDOR_ID:
738 case PCIBIOS_DEVICE_NOT_FOUND:
740 case PCIBIOS_BAD_REGISTER_NUMBER:
742 case PCIBIOS_SET_FAILED:
744 case PCIBIOS_BUFFER_TOO_SMALL:
751 /* Low-level architecture-dependent routines */
754 int (*add_bus)(struct pci_bus *bus);
755 void (*remove_bus)(struct pci_bus *bus);
756 void __iomem *(*map_bus)(struct pci_bus *bus, unsigned int devfn, int where);
757 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
758 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
762 * ACPI needs to be able to access PCI config space before we've done a
763 * PCI bus scan and created pci_bus structures.
765 int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
766 int reg, int len, u32 *val);
767 int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
768 int reg, int len, u32 val);
770 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
771 typedef u64 pci_bus_addr_t;
773 typedef u32 pci_bus_addr_t;
776 struct pci_bus_region {
777 pci_bus_addr_t start;
782 spinlock_t lock; /* Protects list, index */
783 struct list_head list; /* For IDs added at runtime */
788 * PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
789 * a set of callbacks in struct pci_error_handlers, that device driver
790 * will be notified of PCI bus errors, and will be driven to recovery
791 * when an error occurs.
794 typedef unsigned int __bitwise pci_ers_result_t;
796 enum pci_ers_result {
797 /* No result/none/not supported in device driver */
798 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
800 /* Device driver can recover without slot reset */
801 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
803 /* Device driver wants slot to be reset */
804 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
806 /* Device has completely failed, is unrecoverable */
807 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
809 /* Device driver is fully recovered and operational */
810 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
812 /* No AER capabilities registered for the driver */
813 PCI_ERS_RESULT_NO_AER_DRIVER = (__force pci_ers_result_t) 6,
816 /* PCI bus error event callbacks */
817 struct pci_error_handlers {
818 /* PCI bus error detected on this device */
819 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
820 pci_channel_state_t error);
822 /* MMIO has been re-enabled, but not DMA */
823 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
825 /* PCI slot has been reset */
826 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
828 /* PCI function reset prepare or completed */
829 void (*reset_prepare)(struct pci_dev *dev);
830 void (*reset_done)(struct pci_dev *dev);
832 /* Device driver may resume normal operations */
833 void (*resume)(struct pci_dev *dev);
840 * struct pci_driver - PCI driver structure
841 * @node: List of driver structures.
842 * @name: Driver name.
843 * @id_table: Pointer to table of device IDs the driver is
844 * interested in. Most drivers should export this
845 * table using MODULE_DEVICE_TABLE(pci,...).
846 * @probe: This probing function gets called (during execution
847 * of pci_register_driver() for already existing
848 * devices or later if a new device gets inserted) for
849 * all PCI devices which match the ID table and are not
850 * "owned" by the other drivers yet. This function gets
851 * passed a "struct pci_dev \*" for each device whose
852 * entry in the ID table matches the device. The probe
853 * function returns zero when the driver chooses to
854 * take "ownership" of the device or an error code
855 * (negative number) otherwise.
856 * The probe function always gets called from process
857 * context, so it can sleep.
858 * @remove: The remove() function gets called whenever a device
859 * being handled by this driver is removed (either during
860 * deregistration of the driver or when it's manually
861 * pulled out of a hot-pluggable slot).
862 * The remove function always gets called from process
863 * context, so it can sleep.
864 * @suspend: Put device into low power state.
865 * @resume: Wake device from low power state.
866 * (Please see Documentation/power/pci.rst for descriptions
867 * of PCI Power Management and the related functions.)
868 * @shutdown: Hook into reboot_notifier_list (kernel/sys.c).
869 * Intended to stop any idling DMA operations.
870 * Useful for enabling wake-on-lan (NIC) or changing
871 * the power state of a device before reboot.
872 * e.g. drivers/net/e100.c.
873 * @sriov_configure: Optional driver callback to allow configuration of
874 * number of VFs to enable via sysfs "sriov_numvfs" file.
875 * @sriov_set_msix_vec_count: PF Driver callback to change number of MSI-X
876 * vectors on a VF. Triggered via sysfs "sriov_vf_msix_count".
877 * This will change MSI-X Table Size in the VF Message Control
879 * @sriov_get_vf_total_msix: PF driver callback to get the total number of
880 * MSI-X vectors available for distribution to the VFs.
881 * @err_handler: See Documentation/PCI/pci-error-recovery.rst
882 * @groups: Sysfs attribute groups.
883 * @dev_groups: Attributes attached to the device that will be
884 * created once it is bound to the driver.
885 * @driver: Driver model structure.
886 * @dynids: List of dynamically added device IDs.
889 struct list_head node;
891 const struct pci_device_id *id_table; /* Must be non-NULL for probe to be called */
892 int (*probe)(struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
893 void (*remove)(struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
894 int (*suspend)(struct pci_dev *dev, pm_message_t state); /* Device suspended */
895 int (*resume)(struct pci_dev *dev); /* Device woken up */
896 void (*shutdown)(struct pci_dev *dev);
897 int (*sriov_configure)(struct pci_dev *dev, int num_vfs); /* On PF */
898 int (*sriov_set_msix_vec_count)(struct pci_dev *vf, int msix_vec_count); /* On PF */
899 u32 (*sriov_get_vf_total_msix)(struct pci_dev *pf);
900 const struct pci_error_handlers *err_handler;
901 const struct attribute_group **groups;
902 const struct attribute_group **dev_groups;
903 struct device_driver driver;
904 struct pci_dynids dynids;
907 static inline struct pci_driver *to_pci_driver(struct device_driver *drv)
909 return drv ? container_of(drv, struct pci_driver, driver) : NULL;
913 * PCI_DEVICE - macro used to describe a specific PCI device
914 * @vend: the 16 bit PCI Vendor ID
915 * @dev: the 16 bit PCI Device ID
917 * This macro is used to create a struct pci_device_id that matches a
918 * specific device. The subvendor and subdevice fields will be set to
921 #define PCI_DEVICE(vend,dev) \
922 .vendor = (vend), .device = (dev), \
923 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
926 * PCI_DEVICE_DRIVER_OVERRIDE - macro used to describe a PCI device with
927 * override_only flags.
928 * @vend: the 16 bit PCI Vendor ID
929 * @dev: the 16 bit PCI Device ID
930 * @driver_override: the 32 bit PCI Device override_only
932 * This macro is used to create a struct pci_device_id that matches only a
933 * driver_override device. The subvendor and subdevice fields will be set to
936 #define PCI_DEVICE_DRIVER_OVERRIDE(vend, dev, driver_override) \
937 .vendor = (vend), .device = (dev), .subvendor = PCI_ANY_ID, \
938 .subdevice = PCI_ANY_ID, .override_only = (driver_override)
941 * PCI_DRIVER_OVERRIDE_DEVICE_VFIO - macro used to describe a VFIO
942 * "driver_override" PCI device.
943 * @vend: the 16 bit PCI Vendor ID
944 * @dev: the 16 bit PCI Device ID
946 * This macro is used to create a struct pci_device_id that matches a
947 * specific device. The subvendor and subdevice fields will be set to
948 * PCI_ANY_ID and the driver_override will be set to
949 * PCI_ID_F_VFIO_DRIVER_OVERRIDE.
951 #define PCI_DRIVER_OVERRIDE_DEVICE_VFIO(vend, dev) \
952 PCI_DEVICE_DRIVER_OVERRIDE(vend, dev, PCI_ID_F_VFIO_DRIVER_OVERRIDE)
955 * PCI_DEVICE_SUB - macro used to describe a specific PCI device with subsystem
956 * @vend: the 16 bit PCI Vendor ID
957 * @dev: the 16 bit PCI Device ID
958 * @subvend: the 16 bit PCI Subvendor ID
959 * @subdev: the 16 bit PCI Subdevice ID
961 * This macro is used to create a struct pci_device_id that matches a
962 * specific device with subsystem information.
964 #define PCI_DEVICE_SUB(vend, dev, subvend, subdev) \
965 .vendor = (vend), .device = (dev), \
966 .subvendor = (subvend), .subdevice = (subdev)
969 * PCI_DEVICE_CLASS - macro used to describe a specific PCI device class
970 * @dev_class: the class, subclass, prog-if triple for this device
971 * @dev_class_mask: the class mask for this device
973 * This macro is used to create a struct pci_device_id that matches a
974 * specific PCI class. The vendor, device, subvendor, and subdevice
975 * fields will be set to PCI_ANY_ID.
977 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
978 .class = (dev_class), .class_mask = (dev_class_mask), \
979 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
980 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
983 * PCI_VDEVICE - macro used to describe a specific PCI device in short form
984 * @vend: the vendor name
985 * @dev: the 16 bit PCI Device ID
987 * This macro is used to create a struct pci_device_id that matches a
988 * specific PCI device. The subvendor, and subdevice fields will be set
989 * to PCI_ANY_ID. The macro allows the next field to follow as the device
992 #define PCI_VDEVICE(vend, dev) \
993 .vendor = PCI_VENDOR_ID_##vend, .device = (dev), \
994 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0
997 * PCI_DEVICE_DATA - macro used to describe a specific PCI device in very short form
998 * @vend: the vendor name (without PCI_VENDOR_ID_ prefix)
999 * @dev: the device name (without PCI_DEVICE_ID_<vend>_ prefix)
1000 * @data: the driver data to be filled
1002 * This macro is used to create a struct pci_device_id that matches a
1003 * specific PCI device. The subvendor, and subdevice fields will be set
1006 #define PCI_DEVICE_DATA(vend, dev, data) \
1007 .vendor = PCI_VENDOR_ID_##vend, .device = PCI_DEVICE_ID_##vend##_##dev, \
1008 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0, \
1009 .driver_data = (kernel_ulong_t)(data)
1012 PCI_REASSIGN_ALL_RSRC = 0x00000001, /* Ignore firmware setup */
1013 PCI_REASSIGN_ALL_BUS = 0x00000002, /* Reassign all bus numbers */
1014 PCI_PROBE_ONLY = 0x00000004, /* Use existing setup */
1015 PCI_CAN_SKIP_ISA_ALIGN = 0x00000008, /* Don't do ISA alignment */
1016 PCI_ENABLE_PROC_DOMAINS = 0x00000010, /* Enable domains in /proc */
1017 PCI_COMPAT_DOMAIN_0 = 0x00000020, /* ... except domain 0 */
1018 PCI_SCAN_ALL_PCIE_DEVS = 0x00000040, /* Scan all, not just dev 0 */
1021 #define PCI_IRQ_LEGACY (1 << 0) /* Allow legacy interrupts */
1022 #define PCI_IRQ_MSI (1 << 1) /* Allow MSI interrupts */
1023 #define PCI_IRQ_MSIX (1 << 2) /* Allow MSI-X interrupts */
1024 #define PCI_IRQ_AFFINITY (1 << 3) /* Auto-assign affinity */
1026 /* These external functions are only available when PCI support is enabled */
1029 extern unsigned int pci_flags;
1031 static inline void pci_set_flags(int flags) { pci_flags = flags; }
1032 static inline void pci_add_flags(int flags) { pci_flags |= flags; }
1033 static inline void pci_clear_flags(int flags) { pci_flags &= ~flags; }
1034 static inline int pci_has_flag(int flag) { return pci_flags & flag; }
1036 void pcie_bus_configure_settings(struct pci_bus *bus);
1038 enum pcie_bus_config_types {
1039 PCIE_BUS_TUNE_OFF, /* Don't touch MPS at all */
1040 PCIE_BUS_DEFAULT, /* Ensure MPS matches upstream bridge */
1041 PCIE_BUS_SAFE, /* Use largest MPS boot-time devices support */
1042 PCIE_BUS_PERFORMANCE, /* Use MPS and MRRS for best performance */
1043 PCIE_BUS_PEER2PEER, /* Set MPS = 128 for all devices */
1046 extern enum pcie_bus_config_types pcie_bus_config;
1048 extern struct bus_type pci_bus_type;
1050 /* Do NOT directly access these two variables, unless you are arch-specific PCI
1051 * code, or PCI core code. */
1052 extern struct list_head pci_root_buses; /* List of all known PCI buses */
1053 /* Some device drivers need know if PCI is initiated */
1054 int no_pci_devices(void);
1056 void pcibios_resource_survey_bus(struct pci_bus *bus);
1057 void pcibios_bus_add_device(struct pci_dev *pdev);
1058 void pcibios_add_bus(struct pci_bus *bus);
1059 void pcibios_remove_bus(struct pci_bus *bus);
1060 void pcibios_fixup_bus(struct pci_bus *);
1061 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
1062 /* Architecture-specific versions may override this (weak) */
1063 char *pcibios_setup(char *str);
1065 /* Used only when drivers/pci/setup.c is used */
1066 resource_size_t pcibios_align_resource(void *, const struct resource *,
1070 /* Weak but can be overridden by arch */
1071 void pci_fixup_cardbus(struct pci_bus *);
1073 /* Generic PCI functions used internally */
1075 void pcibios_resource_to_bus(struct pci_bus *bus, struct pci_bus_region *region,
1076 struct resource *res);
1077 void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
1078 struct pci_bus_region *region);
1079 void pcibios_scan_specific_bus(int busn);
1080 struct pci_bus *pci_find_bus(int domain, int busnr);
1081 void pci_bus_add_devices(const struct pci_bus *bus);
1082 struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
1083 struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
1084 struct pci_ops *ops, void *sysdata,
1085 struct list_head *resources);
1086 int pci_host_probe(struct pci_host_bridge *bridge);
1087 int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
1088 int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax);
1089 void pci_bus_release_busn_res(struct pci_bus *b);
1090 struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
1091 struct pci_ops *ops, void *sysdata,
1092 struct list_head *resources);
1093 int pci_scan_root_bus_bridge(struct pci_host_bridge *bridge);
1094 struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
1096 struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
1098 struct hotplug_slot *hotplug);
1099 void pci_destroy_slot(struct pci_slot *slot);
1101 void pci_dev_assign_slot(struct pci_dev *dev);
1103 static inline void pci_dev_assign_slot(struct pci_dev *dev) { }
1105 int pci_scan_slot(struct pci_bus *bus, int devfn);
1106 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
1107 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
1108 unsigned int pci_scan_child_bus(struct pci_bus *bus);
1109 void pci_bus_add_device(struct pci_dev *dev);
1110 void pci_read_bridge_bases(struct pci_bus *child);
1111 struct resource *pci_find_parent_resource(const struct pci_dev *dev,
1112 struct resource *res);
1113 u8 pci_swizzle_interrupt_pin(const struct pci_dev *dev, u8 pin);
1114 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
1115 u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
1116 struct pci_dev *pci_dev_get(struct pci_dev *dev);
1117 void pci_dev_put(struct pci_dev *dev);
1118 void pci_remove_bus(struct pci_bus *b);
1119 void pci_stop_and_remove_bus_device(struct pci_dev *dev);
1120 void pci_stop_and_remove_bus_device_locked(struct pci_dev *dev);
1121 void pci_stop_root_bus(struct pci_bus *bus);
1122 void pci_remove_root_bus(struct pci_bus *bus);
1123 void pci_setup_cardbus(struct pci_bus *bus);
1124 void pcibios_setup_bridge(struct pci_bus *bus, unsigned long type);
1125 void pci_sort_breadthfirst(void);
1126 #define dev_is_pci(d) ((d)->bus == &pci_bus_type)
1127 #define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false))
1129 /* Generic PCI functions exported to card drivers */
1131 u8 pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
1132 u8 pci_find_capability(struct pci_dev *dev, int cap);
1133 u8 pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
1134 u8 pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
1135 u8 pci_find_next_ht_capability(struct pci_dev *dev, u8 pos, int ht_cap);
1136 u16 pci_find_ext_capability(struct pci_dev *dev, int cap);
1137 u16 pci_find_next_ext_capability(struct pci_dev *dev, u16 pos, int cap);
1138 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
1139 u16 pci_find_vsec_capability(struct pci_dev *dev, u16 vendor, int cap);
1140 u16 pci_find_dvsec_capability(struct pci_dev *dev, u16 vendor, u16 dvsec);
1142 u64 pci_get_dsn(struct pci_dev *dev);
1144 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
1145 struct pci_dev *from);
1146 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
1147 unsigned int ss_vendor, unsigned int ss_device,
1148 struct pci_dev *from);
1149 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
1150 struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
1151 unsigned int devfn);
1152 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
1153 int pci_dev_present(const struct pci_device_id *ids);
1155 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
1156 int where, u8 *val);
1157 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
1158 int where, u16 *val);
1159 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
1160 int where, u32 *val);
1161 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
1163 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
1164 int where, u16 val);
1165 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
1166 int where, u32 val);
1168 int pci_generic_config_read(struct pci_bus *bus, unsigned int devfn,
1169 int where, int size, u32 *val);
1170 int pci_generic_config_write(struct pci_bus *bus, unsigned int devfn,
1171 int where, int size, u32 val);
1172 int pci_generic_config_read32(struct pci_bus *bus, unsigned int devfn,
1173 int where, int size, u32 *val);
1174 int pci_generic_config_write32(struct pci_bus *bus, unsigned int devfn,
1175 int where, int size, u32 val);
1177 struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
1179 int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val);
1180 int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val);
1181 int pci_read_config_dword(const struct pci_dev *dev, int where, u32 *val);
1182 int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val);
1183 int pci_write_config_word(const struct pci_dev *dev, int where, u16 val);
1184 int pci_write_config_dword(const struct pci_dev *dev, int where, u32 val);
1186 int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val);
1187 int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val);
1188 int pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val);
1189 int pcie_capability_write_dword(struct pci_dev *dev, int pos, u32 val);
1190 int pcie_capability_clear_and_set_word(struct pci_dev *dev, int pos,
1191 u16 clear, u16 set);
1192 int pcie_capability_clear_and_set_dword(struct pci_dev *dev, int pos,
1193 u32 clear, u32 set);
1195 static inline int pcie_capability_set_word(struct pci_dev *dev, int pos,
1198 return pcie_capability_clear_and_set_word(dev, pos, 0, set);
1201 static inline int pcie_capability_set_dword(struct pci_dev *dev, int pos,
1204 return pcie_capability_clear_and_set_dword(dev, pos, 0, set);
1207 static inline int pcie_capability_clear_word(struct pci_dev *dev, int pos,
1210 return pcie_capability_clear_and_set_word(dev, pos, clear, 0);
1213 static inline int pcie_capability_clear_dword(struct pci_dev *dev, int pos,
1216 return pcie_capability_clear_and_set_dword(dev, pos, clear, 0);
1219 /* User-space driven config access */
1220 int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
1221 int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
1222 int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val);
1223 int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val);
1224 int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val);
1225 int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val);
1227 int __must_check pci_enable_device(struct pci_dev *dev);
1228 int __must_check pci_enable_device_io(struct pci_dev *dev);
1229 int __must_check pci_enable_device_mem(struct pci_dev *dev);
1230 int __must_check pci_reenable_device(struct pci_dev *);
1231 int __must_check pcim_enable_device(struct pci_dev *pdev);
1232 void pcim_pin_device(struct pci_dev *pdev);
1234 static inline bool pci_intx_mask_supported(struct pci_dev *pdev)
1237 * INTx masking is supported if PCI_COMMAND_INTX_DISABLE is
1238 * writable and no quirk has marked the feature broken.
1240 return !pdev->broken_intx_masking;
1243 static inline int pci_is_enabled(struct pci_dev *pdev)
1245 return (atomic_read(&pdev->enable_cnt) > 0);
1248 static inline int pci_is_managed(struct pci_dev *pdev)
1250 return pdev->is_managed;
1253 void pci_disable_device(struct pci_dev *dev);
1255 extern unsigned int pcibios_max_latency;
1256 void pci_set_master(struct pci_dev *dev);
1257 void pci_clear_master(struct pci_dev *dev);
1259 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
1260 int pci_set_cacheline_size(struct pci_dev *dev);
1261 int __must_check pci_set_mwi(struct pci_dev *dev);
1262 int __must_check pcim_set_mwi(struct pci_dev *dev);
1263 int pci_try_set_mwi(struct pci_dev *dev);
1264 void pci_clear_mwi(struct pci_dev *dev);
1265 void pci_disable_parity(struct pci_dev *dev);
1266 void pci_intx(struct pci_dev *dev, int enable);
1267 bool pci_check_and_mask_intx(struct pci_dev *dev);
1268 bool pci_check_and_unmask_intx(struct pci_dev *dev);
1269 int pci_wait_for_pending(struct pci_dev *dev, int pos, u16 mask);
1270 int pci_wait_for_pending_transaction(struct pci_dev *dev);
1271 int pcix_get_max_mmrbc(struct pci_dev *dev);
1272 int pcix_get_mmrbc(struct pci_dev *dev);
1273 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
1274 int pcie_get_readrq(struct pci_dev *dev);
1275 int pcie_set_readrq(struct pci_dev *dev, int rq);
1276 int pcie_get_mps(struct pci_dev *dev);
1277 int pcie_set_mps(struct pci_dev *dev, int mps);
1278 u32 pcie_bandwidth_available(struct pci_dev *dev, struct pci_dev **limiting_dev,
1279 enum pci_bus_speed *speed,
1280 enum pcie_link_width *width);
1281 void pcie_print_link_status(struct pci_dev *dev);
1282 int pcie_reset_flr(struct pci_dev *dev, bool probe);
1283 int pcie_flr(struct pci_dev *dev);
1284 int __pci_reset_function_locked(struct pci_dev *dev);
1285 int pci_reset_function(struct pci_dev *dev);
1286 int pci_reset_function_locked(struct pci_dev *dev);
1287 int pci_try_reset_function(struct pci_dev *dev);
1288 int pci_probe_reset_slot(struct pci_slot *slot);
1289 int pci_probe_reset_bus(struct pci_bus *bus);
1290 int pci_reset_bus(struct pci_dev *dev);
1291 void pci_reset_secondary_bus(struct pci_dev *dev);
1292 void pcibios_reset_secondary_bus(struct pci_dev *dev);
1293 void pci_update_resource(struct pci_dev *dev, int resno);
1294 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
1295 int __must_check pci_reassign_resource(struct pci_dev *dev, int i, resource_size_t add_size, resource_size_t align);
1296 void pci_release_resource(struct pci_dev *dev, int resno);
1297 static inline int pci_rebar_bytes_to_size(u64 bytes)
1299 bytes = roundup_pow_of_two(bytes);
1301 /* Return BAR size as defined in the resizable BAR specification */
1302 return max(ilog2(bytes), 20) - 20;
1305 u32 pci_rebar_get_possible_sizes(struct pci_dev *pdev, int bar);
1306 int __must_check pci_resize_resource(struct pci_dev *dev, int i, int size);
1307 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
1308 bool pci_device_is_present(struct pci_dev *pdev);
1309 void pci_ignore_hotplug(struct pci_dev *dev);
1310 struct pci_dev *pci_real_dma_dev(struct pci_dev *dev);
1311 int pci_status_get_and_clear_errors(struct pci_dev *pdev);
1313 int __printf(6, 7) pci_request_irq(struct pci_dev *dev, unsigned int nr,
1314 irq_handler_t handler, irq_handler_t thread_fn, void *dev_id,
1315 const char *fmt, ...);
1316 void pci_free_irq(struct pci_dev *dev, unsigned int nr, void *dev_id);
1318 /* ROM control related routines */
1319 int pci_enable_rom(struct pci_dev *pdev);
1320 void pci_disable_rom(struct pci_dev *pdev);
1321 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
1322 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
1324 /* Power management related routines */
1325 int pci_save_state(struct pci_dev *dev);
1326 void pci_restore_state(struct pci_dev *dev);
1327 struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev);
1328 int pci_load_saved_state(struct pci_dev *dev,
1329 struct pci_saved_state *state);
1330 int pci_load_and_free_saved_state(struct pci_dev *dev,
1331 struct pci_saved_state **state);
1332 int pci_platform_power_transition(struct pci_dev *dev, pci_power_t state);
1333 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
1334 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
1335 bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
1336 void pci_pme_active(struct pci_dev *dev, bool enable);
1337 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable);
1338 int pci_wake_from_d3(struct pci_dev *dev, bool enable);
1339 int pci_prepare_to_sleep(struct pci_dev *dev);
1340 int pci_back_from_sleep(struct pci_dev *dev);
1341 bool pci_dev_run_wake(struct pci_dev *dev);
1342 void pci_d3cold_enable(struct pci_dev *dev);
1343 void pci_d3cold_disable(struct pci_dev *dev);
1344 bool pcie_relaxed_ordering_enabled(struct pci_dev *dev);
1345 void pci_resume_bus(struct pci_bus *bus);
1346 void pci_bus_set_current_state(struct pci_bus *bus, pci_power_t state);
1348 /* For use by arch with custom probe code */
1349 void set_pcie_port_type(struct pci_dev *pdev);
1350 void set_pcie_hotplug_bridge(struct pci_dev *pdev);
1352 /* Functions for PCI Hotplug drivers to use */
1353 unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge);
1354 unsigned int pci_rescan_bus(struct pci_bus *bus);
1355 void pci_lock_rescan_remove(void);
1356 void pci_unlock_rescan_remove(void);
1358 /* Vital Product Data routines */
1359 ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
1360 ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
1361 ssize_t pci_read_vpd_any(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
1362 ssize_t pci_write_vpd_any(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
1364 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
1365 resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx);
1366 void pci_bus_assign_resources(const struct pci_bus *bus);
1367 void pci_bus_claim_resources(struct pci_bus *bus);
1368 void pci_bus_size_bridges(struct pci_bus *bus);
1369 int pci_claim_resource(struct pci_dev *, int);
1370 int pci_claim_bridge_resource(struct pci_dev *bridge, int i);
1371 void pci_assign_unassigned_resources(void);
1372 void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
1373 void pci_assign_unassigned_bus_resources(struct pci_bus *bus);
1374 void pci_assign_unassigned_root_bus_resources(struct pci_bus *bus);
1375 int pci_reassign_bridge_resources(struct pci_dev *bridge, unsigned long type);
1376 void pdev_enable_device(struct pci_dev *);
1377 int pci_enable_resources(struct pci_dev *, int mask);
1378 void pci_assign_irq(struct pci_dev *dev);
1379 struct resource *pci_find_resource(struct pci_dev *dev, struct resource *res);
1380 #define HAVE_PCI_REQ_REGIONS 2
1381 int __must_check pci_request_regions(struct pci_dev *, const char *);
1382 int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
1383 void pci_release_regions(struct pci_dev *);
1384 int __must_check pci_request_region(struct pci_dev *, int, const char *);
1385 void pci_release_region(struct pci_dev *, int);
1386 int pci_request_selected_regions(struct pci_dev *, int, const char *);
1387 int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
1388 void pci_release_selected_regions(struct pci_dev *, int);
1390 /* drivers/pci/bus.c */
1391 void pci_add_resource(struct list_head *resources, struct resource *res);
1392 void pci_add_resource_offset(struct list_head *resources, struct resource *res,
1393 resource_size_t offset);
1394 void pci_free_resource_list(struct list_head *resources);
1395 void pci_bus_add_resource(struct pci_bus *bus, struct resource *res,
1396 unsigned int flags);
1397 struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n);
1398 void pci_bus_remove_resources(struct pci_bus *bus);
1399 int devm_request_pci_bus_resources(struct device *dev,
1400 struct list_head *resources);
1402 /* Temporary until new and working PCI SBR API in place */
1403 int pci_bridge_secondary_bus_reset(struct pci_dev *dev);
1405 #define pci_bus_for_each_resource(bus, res, i) \
1407 (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
1410 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
1411 struct resource *res, resource_size_t size,
1412 resource_size_t align, resource_size_t min,
1413 unsigned long type_mask,
1414 resource_size_t (*alignf)(void *,
1415 const struct resource *,
1421 int pci_register_io_range(struct fwnode_handle *fwnode, phys_addr_t addr,
1422 resource_size_t size);
1423 unsigned long pci_address_to_pio(phys_addr_t addr);
1424 phys_addr_t pci_pio_to_address(unsigned long pio);
1425 int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr);
1426 int devm_pci_remap_iospace(struct device *dev, const struct resource *res,
1427 phys_addr_t phys_addr);
1428 void pci_unmap_iospace(struct resource *res);
1429 void __iomem *devm_pci_remap_cfgspace(struct device *dev,
1430 resource_size_t offset,
1431 resource_size_t size);
1432 void __iomem *devm_pci_remap_cfg_resource(struct device *dev,
1433 struct resource *res);
1435 static inline pci_bus_addr_t pci_bus_address(struct pci_dev *pdev, int bar)
1437 struct pci_bus_region region;
1439 pcibios_resource_to_bus(pdev->bus, ®ion, &pdev->resource[bar]);
1440 return region.start;
1443 /* Proper probing supporting hot-pluggable devices */
1444 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
1445 const char *mod_name);
1447 /* pci_register_driver() must be a macro so KBUILD_MODNAME can be expanded */
1448 #define pci_register_driver(driver) \
1449 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
1451 void pci_unregister_driver(struct pci_driver *dev);
1454 * module_pci_driver() - Helper macro for registering a PCI driver
1455 * @__pci_driver: pci_driver struct
1457 * Helper macro for PCI drivers which do not do anything special in module
1458 * init/exit. This eliminates a lot of boilerplate. Each module may only
1459 * use this macro once, and calling it replaces module_init() and module_exit()
1461 #define module_pci_driver(__pci_driver) \
1462 module_driver(__pci_driver, pci_register_driver, pci_unregister_driver)
1465 * builtin_pci_driver() - Helper macro for registering a PCI driver
1466 * @__pci_driver: pci_driver struct
1468 * Helper macro for PCI drivers which do not do anything special in their
1469 * init code. This eliminates a lot of boilerplate. Each driver may only
1470 * use this macro once, and calling it replaces device_initcall(...)
1472 #define builtin_pci_driver(__pci_driver) \
1473 builtin_driver(__pci_driver, pci_register_driver)
1475 struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
1476 int pci_add_dynid(struct pci_driver *drv,
1477 unsigned int vendor, unsigned int device,
1478 unsigned int subvendor, unsigned int subdevice,
1479 unsigned int class, unsigned int class_mask,
1480 unsigned long driver_data);
1481 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
1482 struct pci_dev *dev);
1483 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
1486 void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
1488 int pci_cfg_space_size(struct pci_dev *dev);
1489 unsigned char pci_bus_max_busnr(struct pci_bus *bus);
1490 void pci_setup_bridge(struct pci_bus *bus);
1491 resource_size_t pcibios_window_alignment(struct pci_bus *bus,
1492 unsigned long type);
1494 #define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
1495 #define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)
1497 int pci_set_vga_state(struct pci_dev *pdev, bool decode,
1498 unsigned int command_bits, u32 flags);
1501 * Virtual interrupts allow for more interrupts to be allocated
1502 * than the device has interrupts for. These are not programmed
1503 * into the device's MSI-X table and must be handled by some
1504 * other driver means.
1506 #define PCI_IRQ_VIRTUAL (1 << 4)
1508 #define PCI_IRQ_ALL_TYPES \
1509 (PCI_IRQ_LEGACY | PCI_IRQ_MSI | PCI_IRQ_MSIX)
1511 #include <linux/dmapool.h>
1514 u32 vector; /* Kernel uses to write allocated vector */
1515 u16 entry; /* Driver uses to specify entry, OS writes */
1518 #ifdef CONFIG_PCI_MSI
1519 int pci_msi_vec_count(struct pci_dev *dev);
1520 void pci_disable_msi(struct pci_dev *dev);
1521 int pci_msix_vec_count(struct pci_dev *dev);
1522 void pci_disable_msix(struct pci_dev *dev);
1523 void pci_restore_msi_state(struct pci_dev *dev);
1524 int pci_msi_enabled(void);
1525 int pci_enable_msi(struct pci_dev *dev);
1526 int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
1527 int minvec, int maxvec);
1528 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1529 struct msix_entry *entries, int nvec)
1531 int rc = pci_enable_msix_range(dev, entries, nvec, nvec);
1536 int pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1537 unsigned int max_vecs, unsigned int flags,
1538 struct irq_affinity *affd);
1540 void pci_free_irq_vectors(struct pci_dev *dev);
1541 int pci_irq_vector(struct pci_dev *dev, unsigned int nr);
1542 const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev, int vec);
1545 static inline int pci_msi_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1546 static inline void pci_disable_msi(struct pci_dev *dev) { }
1547 static inline int pci_msix_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1548 static inline void pci_disable_msix(struct pci_dev *dev) { }
1549 static inline void pci_restore_msi_state(struct pci_dev *dev) { }
1550 static inline int pci_msi_enabled(void) { return 0; }
1551 static inline int pci_enable_msi(struct pci_dev *dev)
1553 static inline int pci_enable_msix_range(struct pci_dev *dev,
1554 struct msix_entry *entries, int minvec, int maxvec)
1556 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1557 struct msix_entry *entries, int nvec)
1561 pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1562 unsigned int max_vecs, unsigned int flags,
1563 struct irq_affinity *aff_desc)
1565 if ((flags & PCI_IRQ_LEGACY) && min_vecs == 1 && dev->irq)
1570 static inline void pci_free_irq_vectors(struct pci_dev *dev)
1574 static inline int pci_irq_vector(struct pci_dev *dev, unsigned int nr)
1576 if (WARN_ON_ONCE(nr > 0))
1580 static inline const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev,
1583 return cpu_possible_mask;
1588 * pci_irqd_intx_xlate() - Translate PCI INTx value to an IRQ domain hwirq
1589 * @d: the INTx IRQ domain
1590 * @node: the DT node for the device whose interrupt we're translating
1591 * @intspec: the interrupt specifier data from the DT
1592 * @intsize: the number of entries in @intspec
1593 * @out_hwirq: pointer at which to write the hwirq number
1594 * @out_type: pointer at which to write the interrupt type
1596 * Translate a PCI INTx interrupt number from device tree in the range 1-4, as
1597 * stored in the standard PCI_INTERRUPT_PIN register, to a value in the range
1598 * 0-3 suitable for use in a 4 entry IRQ domain. That is, subtract one from the
1599 * INTx value to obtain the hwirq number.
1601 * Returns 0 on success, or -EINVAL if the interrupt specifier is out of range.
1603 static inline int pci_irqd_intx_xlate(struct irq_domain *d,
1604 struct device_node *node,
1606 unsigned int intsize,
1607 unsigned long *out_hwirq,
1608 unsigned int *out_type)
1610 const u32 intx = intspec[0];
1612 if (intx < PCI_INTERRUPT_INTA || intx > PCI_INTERRUPT_INTD)
1615 *out_hwirq = intx - PCI_INTERRUPT_INTA;
1619 #ifdef CONFIG_PCIEPORTBUS
1620 extern bool pcie_ports_disabled;
1621 extern bool pcie_ports_native;
1623 #define pcie_ports_disabled true
1624 #define pcie_ports_native false
1627 #define PCIE_LINK_STATE_L0S BIT(0)
1628 #define PCIE_LINK_STATE_L1 BIT(1)
1629 #define PCIE_LINK_STATE_CLKPM BIT(2)
1630 #define PCIE_LINK_STATE_L1_1 BIT(3)
1631 #define PCIE_LINK_STATE_L1_2 BIT(4)
1632 #define PCIE_LINK_STATE_L1_1_PCIPM BIT(5)
1633 #define PCIE_LINK_STATE_L1_2_PCIPM BIT(6)
1635 #ifdef CONFIG_PCIEASPM
1636 int pci_disable_link_state(struct pci_dev *pdev, int state);
1637 int pci_disable_link_state_locked(struct pci_dev *pdev, int state);
1638 void pcie_no_aspm(void);
1639 bool pcie_aspm_support_enabled(void);
1640 bool pcie_aspm_enabled(struct pci_dev *pdev);
1642 static inline int pci_disable_link_state(struct pci_dev *pdev, int state)
1644 static inline int pci_disable_link_state_locked(struct pci_dev *pdev, int state)
1646 static inline void pcie_no_aspm(void) { }
1647 static inline bool pcie_aspm_support_enabled(void) { return false; }
1648 static inline bool pcie_aspm_enabled(struct pci_dev *pdev) { return false; }
1651 #ifdef CONFIG_PCIEAER
1652 bool pci_aer_available(void);
1654 static inline bool pci_aer_available(void) { return false; }
1657 bool pci_ats_disabled(void);
1659 #ifdef CONFIG_PCIE_PTM
1660 int pci_enable_ptm(struct pci_dev *dev, u8 *granularity);
1661 bool pcie_ptm_enabled(struct pci_dev *dev);
1663 static inline int pci_enable_ptm(struct pci_dev *dev, u8 *granularity)
1665 static inline bool pcie_ptm_enabled(struct pci_dev *dev)
1669 void pci_cfg_access_lock(struct pci_dev *dev);
1670 bool pci_cfg_access_trylock(struct pci_dev *dev);
1671 void pci_cfg_access_unlock(struct pci_dev *dev);
1673 void pci_dev_lock(struct pci_dev *dev);
1674 int pci_dev_trylock(struct pci_dev *dev);
1675 void pci_dev_unlock(struct pci_dev *dev);
1678 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
1679 * a PCI domain is defined to be a set of PCI buses which share
1680 * configuration space.
1682 #ifdef CONFIG_PCI_DOMAINS
1683 extern int pci_domains_supported;
1685 enum { pci_domains_supported = 0 };
1686 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1687 static inline int pci_proc_domain(struct pci_bus *bus) { return 0; }
1688 #endif /* CONFIG_PCI_DOMAINS */
1691 * Generic implementation for PCI domain support. If your
1692 * architecture does not need custom management of PCI
1693 * domains then this implementation will be used
1695 #ifdef CONFIG_PCI_DOMAINS_GENERIC
1696 static inline int pci_domain_nr(struct pci_bus *bus)
1698 return bus->domain_nr;
1701 int acpi_pci_bus_find_domain_nr(struct pci_bus *bus);
1703 static inline int acpi_pci_bus_find_domain_nr(struct pci_bus *bus)
1706 int pci_bus_find_domain_nr(struct pci_bus *bus, struct device *parent);
1709 /* Some architectures require additional setup to direct VGA traffic */
1710 typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
1711 unsigned int command_bits, u32 flags);
1712 void pci_register_set_vga_state(arch_set_vga_state_t func);
1715 pci_request_io_regions(struct pci_dev *pdev, const char *name)
1717 return pci_request_selected_regions(pdev,
1718 pci_select_bars(pdev, IORESOURCE_IO), name);
1722 pci_release_io_regions(struct pci_dev *pdev)
1724 return pci_release_selected_regions(pdev,
1725 pci_select_bars(pdev, IORESOURCE_IO));
1729 pci_request_mem_regions(struct pci_dev *pdev, const char *name)
1731 return pci_request_selected_regions(pdev,
1732 pci_select_bars(pdev, IORESOURCE_MEM), name);
1736 pci_release_mem_regions(struct pci_dev *pdev)
1738 return pci_release_selected_regions(pdev,
1739 pci_select_bars(pdev, IORESOURCE_MEM));
1742 #else /* CONFIG_PCI is not enabled */
1744 static inline void pci_set_flags(int flags) { }
1745 static inline void pci_add_flags(int flags) { }
1746 static inline void pci_clear_flags(int flags) { }
1747 static inline int pci_has_flag(int flag) { return 0; }
1750 * If the system does not have PCI, clearly these return errors. Define
1751 * these as simple inline functions to avoid hair in drivers.
1753 #define _PCI_NOP(o, s, t) \
1754 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
1756 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
1758 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
1759 _PCI_NOP(o, word, u16 x) \
1760 _PCI_NOP(o, dword, u32 x)
1761 _PCI_NOP_ALL(read, *)
1762 _PCI_NOP_ALL(write,)
1764 static inline struct pci_dev *pci_get_device(unsigned int vendor,
1765 unsigned int device,
1766 struct pci_dev *from)
1769 static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
1770 unsigned int device,
1771 unsigned int ss_vendor,
1772 unsigned int ss_device,
1773 struct pci_dev *from)
1776 static inline struct pci_dev *pci_get_class(unsigned int class,
1777 struct pci_dev *from)
1780 #define pci_dev_present(ids) (0)
1781 #define no_pci_devices() (1)
1782 #define pci_dev_put(dev) do { } while (0)
1784 static inline void pci_set_master(struct pci_dev *dev) { }
1785 static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
1786 static inline void pci_disable_device(struct pci_dev *dev) { }
1787 static inline int pcim_enable_device(struct pci_dev *pdev) { return -EIO; }
1788 static inline int pci_assign_resource(struct pci_dev *dev, int i)
1790 static inline int __must_check __pci_register_driver(struct pci_driver *drv,
1791 struct module *owner,
1792 const char *mod_name)
1794 static inline int pci_register_driver(struct pci_driver *drv)
1796 static inline void pci_unregister_driver(struct pci_driver *drv) { }
1797 static inline u8 pci_find_capability(struct pci_dev *dev, int cap)
1799 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
1802 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
1805 static inline u64 pci_get_dsn(struct pci_dev *dev)
1808 /* Power management related routines */
1809 static inline int pci_save_state(struct pci_dev *dev) { return 0; }
1810 static inline void pci_restore_state(struct pci_dev *dev) { }
1811 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
1813 static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable)
1815 static inline pci_power_t pci_choose_state(struct pci_dev *dev,
1818 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1822 static inline struct resource *pci_find_resource(struct pci_dev *dev,
1823 struct resource *res)
1825 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
1827 static inline void pci_release_regions(struct pci_dev *dev) { }
1829 static inline int pci_register_io_range(struct fwnode_handle *fwnode,
1830 phys_addr_t addr, resource_size_t size)
1833 static inline unsigned long pci_address_to_pio(phys_addr_t addr) { return -1; }
1835 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
1837 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
1840 static inline struct pci_dev *pci_get_domain_bus_and_slot(int domain,
1841 unsigned int bus, unsigned int devfn)
1844 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1845 static inline struct pci_dev *pci_dev_get(struct pci_dev *dev) { return NULL; }
1847 #define dev_is_pci(d) (false)
1848 #define dev_is_pf(d) (false)
1849 static inline bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags)
1851 static inline int pci_irqd_intx_xlate(struct irq_domain *d,
1852 struct device_node *node,
1854 unsigned int intsize,
1855 unsigned long *out_hwirq,
1856 unsigned int *out_type)
1859 static inline const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
1860 struct pci_dev *dev)
1862 static inline bool pci_ats_disabled(void) { return true; }
1864 static inline int pci_irq_vector(struct pci_dev *dev, unsigned int nr)
1870 pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1871 unsigned int max_vecs, unsigned int flags,
1872 struct irq_affinity *aff_desc)
1876 #endif /* CONFIG_PCI */
1879 pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs,
1880 unsigned int max_vecs, unsigned int flags)
1882 return pci_alloc_irq_vectors_affinity(dev, min_vecs, max_vecs, flags,
1886 /* Include architecture-dependent settings and functions */
1888 #include <asm/pci.h>
1890 /* These two functions provide almost identical functionality. Depending
1891 * on the architecture, one will be implemented as a wrapper around the
1892 * other (in drivers/pci/mmap.c).
1894 * pci_mmap_resource_range() maps a specific BAR, and vm->vm_pgoff
1895 * is expected to be an offset within that region.
1897 * pci_mmap_page_range() is the legacy architecture-specific interface,
1898 * which accepts a "user visible" resource address converted by
1899 * pci_resource_to_user(), as used in the legacy mmap() interface in
1902 int pci_mmap_resource_range(struct pci_dev *dev, int bar,
1903 struct vm_area_struct *vma,
1904 enum pci_mmap_state mmap_state, int write_combine);
1905 int pci_mmap_page_range(struct pci_dev *pdev, int bar,
1906 struct vm_area_struct *vma,
1907 enum pci_mmap_state mmap_state, int write_combine);
1909 #ifndef arch_can_pci_mmap_wc
1910 #define arch_can_pci_mmap_wc() 0
1913 #ifndef arch_can_pci_mmap_io
1914 #define arch_can_pci_mmap_io() 0
1915 #define pci_iobar_pfn(pdev, bar, vma) (-EINVAL)
1917 int pci_iobar_pfn(struct pci_dev *pdev, int bar, struct vm_area_struct *vma);
1920 #ifndef pci_root_bus_fwnode
1921 #define pci_root_bus_fwnode(bus) NULL
1925 * These helpers provide future and backwards compatibility
1926 * for accessing popular PCI BAR info
1928 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
1929 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
1930 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
1931 #define pci_resource_len(dev,bar) \
1932 ((pci_resource_end((dev), (bar)) == 0) ? 0 : \
1934 (pci_resource_end((dev), (bar)) - \
1935 pci_resource_start((dev), (bar)) + 1))
1938 * Similar to the helpers above, these manipulate per-pci_dev
1939 * driver-specific data. They are really just a wrapper around
1940 * the generic device structure functions of these calls.
1942 static inline void *pci_get_drvdata(struct pci_dev *pdev)
1944 return dev_get_drvdata(&pdev->dev);
1947 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
1949 dev_set_drvdata(&pdev->dev, data);
1952 static inline const char *pci_name(const struct pci_dev *pdev)
1954 return dev_name(&pdev->dev);
1957 void pci_resource_to_user(const struct pci_dev *dev, int bar,
1958 const struct resource *rsrc,
1959 resource_size_t *start, resource_size_t *end);
1962 * The world is not perfect and supplies us with broken PCI devices.
1963 * For at least a part of these bugs we need a work-around, so both
1964 * generic (drivers/pci/quirks.c) and per-architecture code can define
1965 * fixup hooks to be called for particular buggy devices.
1969 u16 vendor; /* Or PCI_ANY_ID */
1970 u16 device; /* Or PCI_ANY_ID */
1971 u32 class; /* Or PCI_ANY_ID */
1972 unsigned int class_shift; /* should be 0, 8, 16 */
1973 #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
1976 void (*hook)(struct pci_dev *dev);
1980 enum pci_fixup_pass {
1981 pci_fixup_early, /* Before probing BARs */
1982 pci_fixup_header, /* After reading configuration header */
1983 pci_fixup_final, /* Final phase of device fixups */
1984 pci_fixup_enable, /* pci_enable_device() time */
1985 pci_fixup_resume, /* pci_device_resume() */
1986 pci_fixup_suspend, /* pci_device_suspend() */
1987 pci_fixup_resume_early, /* pci_device_resume_early() */
1988 pci_fixup_suspend_late, /* pci_device_suspend_late() */
1991 #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
1992 #define ___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1993 class_shift, hook) \
1994 __ADDRESSABLE(hook) \
1995 asm(".section " #sec ", \"a\" \n" \
1997 ".short " #vendor ", " #device " \n" \
1998 ".long " #class ", " #class_shift " \n" \
1999 ".long " #hook " - . \n" \
2003 * Clang's LTO may rename static functions in C, but has no way to
2004 * handle such renamings when referenced from inline asm. To work
2005 * around this, create global C stubs for these cases.
2007 #ifdef CONFIG_LTO_CLANG
2008 #define __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
2009 class_shift, hook, stub) \
2010 void __cficanonical stub(struct pci_dev *dev); \
2011 void __cficanonical stub(struct pci_dev *dev) \
2015 ___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
2018 #define __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
2019 class_shift, hook, stub) \
2020 ___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
2024 #define DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
2025 class_shift, hook) \
2026 __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
2027 class_shift, hook, __UNIQUE_ID(hook))
2029 /* Anonymous variables would be nice... */
2030 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \
2031 class_shift, hook) \
2032 static const struct pci_fixup __PASTE(__pci_fixup_##name,__LINE__) __used \
2033 __attribute__((__section__(#section), aligned((sizeof(void *))))) \
2034 = { vendor, device, class, class_shift, hook };
2037 #define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class, \
2038 class_shift, hook) \
2039 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
2040 hook, vendor, device, class, class_shift, hook)
2041 #define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class, \
2042 class_shift, hook) \
2043 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
2044 hook, vendor, device, class, class_shift, hook)
2045 #define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class, \
2046 class_shift, hook) \
2047 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
2048 hook, vendor, device, class, class_shift, hook)
2049 #define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class, \
2050 class_shift, hook) \
2051 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
2052 hook, vendor, device, class, class_shift, hook)
2053 #define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class, \
2054 class_shift, hook) \
2055 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
2056 resume##hook, vendor, device, class, class_shift, hook)
2057 #define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class, \
2058 class_shift, hook) \
2059 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
2060 resume_early##hook, vendor, device, class, class_shift, hook)
2061 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class, \
2062 class_shift, hook) \
2063 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
2064 suspend##hook, vendor, device, class, class_shift, hook)
2065 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND_LATE(vendor, device, class, \
2066 class_shift, hook) \
2067 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
2068 suspend_late##hook, vendor, device, class, class_shift, hook)
2070 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
2071 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
2072 hook, vendor, device, PCI_ANY_ID, 0, hook)
2073 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
2074 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
2075 hook, vendor, device, PCI_ANY_ID, 0, hook)
2076 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
2077 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
2078 hook, vendor, device, PCI_ANY_ID, 0, hook)
2079 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
2080 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
2081 hook, vendor, device, PCI_ANY_ID, 0, hook)
2082 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
2083 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
2084 resume##hook, vendor, device, PCI_ANY_ID, 0, hook)
2085 #define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
2086 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
2087 resume_early##hook, vendor, device, PCI_ANY_ID, 0, hook)
2088 #define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
2089 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
2090 suspend##hook, vendor, device, PCI_ANY_ID, 0, hook)
2091 #define DECLARE_PCI_FIXUP_SUSPEND_LATE(vendor, device, hook) \
2092 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
2093 suspend_late##hook, vendor, device, PCI_ANY_ID, 0, hook)
2095 #ifdef CONFIG_PCI_QUIRKS
2096 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
2098 static inline void pci_fixup_device(enum pci_fixup_pass pass,
2099 struct pci_dev *dev) { }
2102 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
2103 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
2104 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
2105 int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name);
2106 int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
2108 void pcim_iounmap_regions(struct pci_dev *pdev, int mask);
2110 extern int pci_pci_problems;
2111 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
2112 #define PCIPCI_TRITON 2
2113 #define PCIPCI_NATOMA 4
2114 #define PCIPCI_VIAETBF 8
2115 #define PCIPCI_VSFX 16
2116 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
2117 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
2119 extern unsigned long pci_cardbus_io_size;
2120 extern unsigned long pci_cardbus_mem_size;
2121 extern u8 pci_dfl_cache_line_size;
2122 extern u8 pci_cache_line_size;
2124 /* Architecture-specific versions may override these (weak) */
2125 void pcibios_disable_device(struct pci_dev *dev);
2126 void pcibios_set_master(struct pci_dev *dev);
2127 int pcibios_set_pcie_reset_state(struct pci_dev *dev,
2128 enum pcie_reset_state state);
2129 int pcibios_device_add(struct pci_dev *dev);
2130 void pcibios_release_device(struct pci_dev *dev);
2132 void pcibios_penalize_isa_irq(int irq, int active);
2134 static inline void pcibios_penalize_isa_irq(int irq, int active) {}
2136 int pcibios_alloc_irq(struct pci_dev *dev);
2137 void pcibios_free_irq(struct pci_dev *dev);
2138 resource_size_t pcibios_default_alignment(void);
2140 #if defined(CONFIG_PCI_MMCONFIG) || defined(CONFIG_ACPI_MCFG)
2141 void __init pci_mmcfg_early_init(void);
2142 void __init pci_mmcfg_late_init(void);
2144 static inline void pci_mmcfg_early_init(void) { }
2145 static inline void pci_mmcfg_late_init(void) { }
2148 int pci_ext_cfg_avail(void);
2150 void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
2151 void __iomem *pci_ioremap_wc_bar(struct pci_dev *pdev, int bar);
2153 #ifdef CONFIG_PCI_IOV
2154 int pci_iov_virtfn_bus(struct pci_dev *dev, int id);
2155 int pci_iov_virtfn_devfn(struct pci_dev *dev, int id);
2157 int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
2158 void pci_disable_sriov(struct pci_dev *dev);
2160 int pci_iov_sysfs_link(struct pci_dev *dev, struct pci_dev *virtfn, int id);
2161 int pci_iov_add_virtfn(struct pci_dev *dev, int id);
2162 void pci_iov_remove_virtfn(struct pci_dev *dev, int id);
2163 int pci_num_vf(struct pci_dev *dev);
2164 int pci_vfs_assigned(struct pci_dev *dev);
2165 int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs);
2166 int pci_sriov_get_totalvfs(struct pci_dev *dev);
2167 int pci_sriov_configure_simple(struct pci_dev *dev, int nr_virtfn);
2168 resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno);
2169 void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe);
2171 /* Arch may override these (weak) */
2172 int pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs);
2173 int pcibios_sriov_disable(struct pci_dev *pdev);
2174 resource_size_t pcibios_iov_resource_alignment(struct pci_dev *dev, int resno);
2176 static inline int pci_iov_virtfn_bus(struct pci_dev *dev, int id)
2180 static inline int pci_iov_virtfn_devfn(struct pci_dev *dev, int id)
2184 static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
2187 static inline int pci_iov_sysfs_link(struct pci_dev *dev,
2188 struct pci_dev *virtfn, int id)
2192 static inline int pci_iov_add_virtfn(struct pci_dev *dev, int id)
2196 static inline void pci_iov_remove_virtfn(struct pci_dev *dev,
2198 static inline void pci_disable_sriov(struct pci_dev *dev) { }
2199 static inline int pci_num_vf(struct pci_dev *dev) { return 0; }
2200 static inline int pci_vfs_assigned(struct pci_dev *dev)
2202 static inline int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs)
2204 static inline int pci_sriov_get_totalvfs(struct pci_dev *dev)
2206 #define pci_sriov_configure_simple NULL
2207 static inline resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno)
2209 static inline void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe) { }
2212 #if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
2213 void pci_hp_create_module_link(struct pci_slot *pci_slot);
2214 void pci_hp_remove_module_link(struct pci_slot *pci_slot);
2218 * pci_pcie_cap - get the saved PCIe capability offset
2221 * PCIe capability offset is calculated at PCI device initialization
2222 * time and saved in the data structure. This function returns saved
2223 * PCIe capability offset. Using this instead of pci_find_capability()
2224 * reduces unnecessary search in the PCI configuration space. If you
2225 * need to calculate PCIe capability offset from raw device for some
2226 * reasons, please use pci_find_capability() instead.
2228 static inline int pci_pcie_cap(struct pci_dev *dev)
2230 return dev->pcie_cap;
2234 * pci_is_pcie - check if the PCI device is PCI Express capable
2237 * Returns: true if the PCI device is PCI Express capable, false otherwise.
2239 static inline bool pci_is_pcie(struct pci_dev *dev)
2241 return pci_pcie_cap(dev);
2245 * pcie_caps_reg - get the PCIe Capabilities Register
2248 static inline u16 pcie_caps_reg(const struct pci_dev *dev)
2250 return dev->pcie_flags_reg;
2254 * pci_pcie_type - get the PCIe device/port type
2257 static inline int pci_pcie_type(const struct pci_dev *dev)
2259 return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4;
2263 * pcie_find_root_port - Get the PCIe root port device
2266 * Traverse up the parent chain and return the PCIe Root Port PCI Device
2267 * for a given PCI/PCIe Device.
2269 static inline struct pci_dev *pcie_find_root_port(struct pci_dev *dev)
2272 if (pci_is_pcie(dev) &&
2273 pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT)
2275 dev = pci_upstream_bridge(dev);
2281 void pci_request_acs(void);
2282 bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags);
2283 bool pci_acs_path_enabled(struct pci_dev *start,
2284 struct pci_dev *end, u16 acs_flags);
2285 int pci_enable_atomic_ops_to_root(struct pci_dev *dev, u32 cap_mask);
2287 #define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */
2288 #define PCI_VPD_LRDT_ID(x) ((x) | PCI_VPD_LRDT)
2290 /* Large Resource Data Type Tag Item Names */
2291 #define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */
2292 #define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */
2293 #define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */
2295 #define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING)
2296 #define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA)
2297 #define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA)
2299 #define PCI_VPD_RO_KEYWORD_PARTNO "PN"
2300 #define PCI_VPD_RO_KEYWORD_SERIALNO "SN"
2301 #define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
2302 #define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
2303 #define PCI_VPD_RO_KEYWORD_CHKSUM "RV"
2306 * pci_vpd_alloc - Allocate buffer and read VPD into it
2308 * @size: pointer to field where VPD length is returned
2310 * Returns pointer to allocated buffer or an ERR_PTR in case of failure
2312 void *pci_vpd_alloc(struct pci_dev *dev, unsigned int *size);
2315 * pci_vpd_find_id_string - Locate id string in VPD
2316 * @buf: Pointer to buffered VPD data
2317 * @len: The length of the buffer area in which to search
2318 * @size: Pointer to field where length of id string is returned
2320 * Returns the index of the id string or -ENOENT if not found.
2322 int pci_vpd_find_id_string(const u8 *buf, unsigned int len, unsigned int *size);
2325 * pci_vpd_find_ro_info_keyword - Locate info field keyword in VPD RO section
2326 * @buf: Pointer to buffered VPD data
2327 * @len: The length of the buffer area in which to search
2328 * @kw: The keyword to search for
2329 * @size: Pointer to field where length of found keyword data is returned
2331 * Returns the index of the information field keyword data or -ENOENT if
2334 int pci_vpd_find_ro_info_keyword(const void *buf, unsigned int len,
2335 const char *kw, unsigned int *size);
2338 * pci_vpd_check_csum - Check VPD checksum
2339 * @buf: Pointer to buffered VPD data
2342 * Returns 1 if VPD has no checksum, otherwise 0 or an errno
2344 int pci_vpd_check_csum(const void *buf, unsigned int len);
2346 /* PCI <-> OF binding helpers */
2350 struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus);
2351 bool pci_host_of_has_msi_map(struct device *dev);
2353 /* Arch may override this (weak) */
2354 struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus);
2356 #else /* CONFIG_OF */
2357 static inline struct irq_domain *
2358 pci_host_bridge_of_msi_domain(struct pci_bus *bus) { return NULL; }
2359 static inline bool pci_host_of_has_msi_map(struct device *dev) { return false; }
2360 #endif /* CONFIG_OF */
2362 static inline struct device_node *
2363 pci_device_to_OF_node(const struct pci_dev *pdev)
2365 return pdev ? pdev->dev.of_node : NULL;
2368 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
2370 return bus ? bus->dev.of_node : NULL;
2374 struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus);
2377 pci_msi_register_fwnode_provider(struct fwnode_handle *(*fn)(struct device *));
2378 bool pci_pr3_present(struct pci_dev *pdev);
2380 static inline struct irq_domain *
2381 pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) { return NULL; }
2382 static inline bool pci_pr3_present(struct pci_dev *pdev) { return false; }
2386 static inline struct eeh_dev *pci_dev_to_eeh_dev(struct pci_dev *pdev)
2388 return pdev->dev.archdata.edev;
2392 void pci_add_dma_alias(struct pci_dev *dev, u8 devfn_from, unsigned nr_devfns);
2393 bool pci_devs_are_dma_aliases(struct pci_dev *dev1, struct pci_dev *dev2);
2394 int pci_for_each_dma_alias(struct pci_dev *pdev,
2395 int (*fn)(struct pci_dev *pdev,
2396 u16 alias, void *data), void *data);
2398 /* Helper functions for operation of device flag */
2399 static inline void pci_set_dev_assigned(struct pci_dev *pdev)
2401 pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED;
2403 static inline void pci_clear_dev_assigned(struct pci_dev *pdev)
2405 pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
2407 static inline bool pci_is_dev_assigned(struct pci_dev *pdev)
2409 return (pdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED) == PCI_DEV_FLAGS_ASSIGNED;
2413 * pci_ari_enabled - query ARI forwarding status
2416 * Returns true if ARI forwarding is enabled.
2418 static inline bool pci_ari_enabled(struct pci_bus *bus)
2420 return bus->self && bus->self->ari_enabled;
2424 * pci_is_thunderbolt_attached - whether device is on a Thunderbolt daisy chain
2425 * @pdev: PCI device to check
2427 * Walk upwards from @pdev and check for each encountered bridge if it's part
2428 * of a Thunderbolt controller. Reaching the host bridge means @pdev is not
2429 * Thunderbolt-attached. (But rather soldered to the mainboard usually.)
2431 static inline bool pci_is_thunderbolt_attached(struct pci_dev *pdev)
2433 struct pci_dev *parent = pdev;
2435 if (pdev->is_thunderbolt)
2438 while ((parent = pci_upstream_bridge(parent)))
2439 if (parent->is_thunderbolt)
2445 #if defined(CONFIG_PCIEPORTBUS) || defined(CONFIG_EEH)
2446 void pci_uevent_ers(struct pci_dev *pdev, enum pci_ers_result err_type);
2449 /* Provide the legacy pci_dma_* API */
2450 #include <linux/pci-dma-compat.h>
2452 #define pci_printk(level, pdev, fmt, arg...) \
2453 dev_printk(level, &(pdev)->dev, fmt, ##arg)
2455 #define pci_emerg(pdev, fmt, arg...) dev_emerg(&(pdev)->dev, fmt, ##arg)
2456 #define pci_alert(pdev, fmt, arg...) dev_alert(&(pdev)->dev, fmt, ##arg)
2457 #define pci_crit(pdev, fmt, arg...) dev_crit(&(pdev)->dev, fmt, ##arg)
2458 #define pci_err(pdev, fmt, arg...) dev_err(&(pdev)->dev, fmt, ##arg)
2459 #define pci_warn(pdev, fmt, arg...) dev_warn(&(pdev)->dev, fmt, ##arg)
2460 #define pci_notice(pdev, fmt, arg...) dev_notice(&(pdev)->dev, fmt, ##arg)
2461 #define pci_info(pdev, fmt, arg...) dev_info(&(pdev)->dev, fmt, ##arg)
2462 #define pci_dbg(pdev, fmt, arg...) dev_dbg(&(pdev)->dev, fmt, ##arg)
2464 #define pci_notice_ratelimited(pdev, fmt, arg...) \
2465 dev_notice_ratelimited(&(pdev)->dev, fmt, ##arg)
2467 #define pci_info_ratelimited(pdev, fmt, arg...) \
2468 dev_info_ratelimited(&(pdev)->dev, fmt, ##arg)
2470 #define pci_WARN(pdev, condition, fmt, arg...) \
2471 WARN(condition, "%s %s: " fmt, \
2472 dev_driver_string(&(pdev)->dev), pci_name(pdev), ##arg)
2474 #define pci_WARN_ONCE(pdev, condition, fmt, arg...) \
2475 WARN_ONCE(condition, "%s %s: " fmt, \
2476 dev_driver_string(&(pdev)->dev), pci_name(pdev), ##arg)
2478 #endif /* LINUX_PCI_H */