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 * Reading from a device that doesn't respond typically returns ~0. A
159 * successful read from a device may also return ~0, so you need additional
160 * information to reliably identify errors.
162 #define PCI_ERROR_RESPONSE (~0ULL)
163 #define PCI_SET_ERROR_RESPONSE(val) (*(val) = ((typeof(*(val))) PCI_ERROR_RESPONSE))
164 #define PCI_POSSIBLE_ERROR(val) ((val) == ((typeof(val)) PCI_ERROR_RESPONSE))
167 * pci_power_t values must match the bits in the Capabilities PME_Support
168 * and Control/Status PowerState fields in the Power Management capability.
170 typedef int __bitwise pci_power_t;
172 #define PCI_D0 ((pci_power_t __force) 0)
173 #define PCI_D1 ((pci_power_t __force) 1)
174 #define PCI_D2 ((pci_power_t __force) 2)
175 #define PCI_D3hot ((pci_power_t __force) 3)
176 #define PCI_D3cold ((pci_power_t __force) 4)
177 #define PCI_UNKNOWN ((pci_power_t __force) 5)
178 #define PCI_POWER_ERROR ((pci_power_t __force) -1)
180 /* Remember to update this when the list above changes! */
181 extern const char *pci_power_names[];
183 static inline const char *pci_power_name(pci_power_t state)
185 return pci_power_names[1 + (__force int) state];
189 * typedef pci_channel_state_t
191 * The pci_channel state describes connectivity between the CPU and
192 * the PCI device. If some PCI bus between here and the PCI device
193 * has crashed or locked up, this info is reflected here.
195 typedef unsigned int __bitwise pci_channel_state_t;
198 /* I/O channel is in normal state */
199 pci_channel_io_normal = (__force pci_channel_state_t) 1,
201 /* I/O to channel is blocked */
202 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
204 /* PCI card is dead */
205 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
208 typedef unsigned int __bitwise pcie_reset_state_t;
210 enum pcie_reset_state {
211 /* Reset is NOT asserted (Use to deassert reset) */
212 pcie_deassert_reset = (__force pcie_reset_state_t) 1,
214 /* Use #PERST to reset PCIe device */
215 pcie_warm_reset = (__force pcie_reset_state_t) 2,
217 /* Use PCIe Hot Reset to reset device */
218 pcie_hot_reset = (__force pcie_reset_state_t) 3
221 typedef unsigned short __bitwise pci_dev_flags_t;
223 /* INTX_DISABLE in PCI_COMMAND register disables MSI too */
224 PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) (1 << 0),
225 /* Device configuration is irrevocably lost if disabled into D3 */
226 PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) (1 << 1),
227 /* Provide indication device is assigned by a Virtual Machine Manager */
228 PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) (1 << 2),
229 /* Flag for quirk use to store if quirk-specific ACS is enabled */
230 PCI_DEV_FLAGS_ACS_ENABLED_QUIRK = (__force pci_dev_flags_t) (1 << 3),
231 /* Use a PCIe-to-PCI bridge alias even if !pci_is_pcie */
232 PCI_DEV_FLAG_PCIE_BRIDGE_ALIAS = (__force pci_dev_flags_t) (1 << 5),
233 /* Do not use bus resets for device */
234 PCI_DEV_FLAGS_NO_BUS_RESET = (__force pci_dev_flags_t) (1 << 6),
235 /* Do not use PM reset even if device advertises NoSoftRst- */
236 PCI_DEV_FLAGS_NO_PM_RESET = (__force pci_dev_flags_t) (1 << 7),
237 /* Get VPD from function 0 VPD */
238 PCI_DEV_FLAGS_VPD_REF_F0 = (__force pci_dev_flags_t) (1 << 8),
239 /* A non-root bridge where translation occurs, stop alias search here */
240 PCI_DEV_FLAGS_BRIDGE_XLATE_ROOT = (__force pci_dev_flags_t) (1 << 9),
241 /* Do not use FLR even if device advertises PCI_AF_CAP */
242 PCI_DEV_FLAGS_NO_FLR_RESET = (__force pci_dev_flags_t) (1 << 10),
243 /* Don't use Relaxed Ordering for TLPs directed at this device */
244 PCI_DEV_FLAGS_NO_RELAXED_ORDERING = (__force pci_dev_flags_t) (1 << 11),
245 /* Device does honor MSI masking despite saying otherwise */
246 PCI_DEV_FLAGS_HAS_MSI_MASKING = (__force pci_dev_flags_t) (1 << 12),
249 enum pci_irq_reroute_variant {
250 INTEL_IRQ_REROUTE_VARIANT = 1,
251 MAX_IRQ_REROUTE_VARIANTS = 3
254 typedef unsigned short __bitwise pci_bus_flags_t;
256 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
257 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
258 PCI_BUS_FLAGS_NO_AERSID = (__force pci_bus_flags_t) 4,
259 PCI_BUS_FLAGS_NO_EXTCFG = (__force pci_bus_flags_t) 8,
262 /* Values from Link Status register, PCIe r3.1, sec 7.8.8 */
263 enum pcie_link_width {
264 PCIE_LNK_WIDTH_RESRV = 0x00,
272 PCIE_LNK_WIDTH_UNKNOWN = 0xff,
275 /* See matching string table in pci_speed_string() */
277 PCI_SPEED_33MHz = 0x00,
278 PCI_SPEED_66MHz = 0x01,
279 PCI_SPEED_66MHz_PCIX = 0x02,
280 PCI_SPEED_100MHz_PCIX = 0x03,
281 PCI_SPEED_133MHz_PCIX = 0x04,
282 PCI_SPEED_66MHz_PCIX_ECC = 0x05,
283 PCI_SPEED_100MHz_PCIX_ECC = 0x06,
284 PCI_SPEED_133MHz_PCIX_ECC = 0x07,
285 PCI_SPEED_66MHz_PCIX_266 = 0x09,
286 PCI_SPEED_100MHz_PCIX_266 = 0x0a,
287 PCI_SPEED_133MHz_PCIX_266 = 0x0b,
293 PCI_SPEED_66MHz_PCIX_533 = 0x11,
294 PCI_SPEED_100MHz_PCIX_533 = 0x12,
295 PCI_SPEED_133MHz_PCIX_533 = 0x13,
296 PCIE_SPEED_2_5GT = 0x14,
297 PCIE_SPEED_5_0GT = 0x15,
298 PCIE_SPEED_8_0GT = 0x16,
299 PCIE_SPEED_16_0GT = 0x17,
300 PCIE_SPEED_32_0GT = 0x18,
301 PCIE_SPEED_64_0GT = 0x19,
302 PCI_SPEED_UNKNOWN = 0xff,
305 enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev);
306 enum pcie_link_width pcie_get_width_cap(struct pci_dev *dev);
315 struct pcie_link_state;
320 /* The pci_dev structure describes PCI devices */
322 struct list_head bus_list; /* Node in per-bus list */
323 struct pci_bus *bus; /* Bus this device is on */
324 struct pci_bus *subordinate; /* Bus this device bridges to */
326 void *sysdata; /* Hook for sys-specific extension */
327 struct proc_dir_entry *procent; /* Device entry in /proc/bus/pci */
328 struct pci_slot *slot; /* Physical slot this device is in */
330 unsigned int devfn; /* Encoded device & function index */
331 unsigned short vendor;
332 unsigned short device;
333 unsigned short subsystem_vendor;
334 unsigned short subsystem_device;
335 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
336 u8 revision; /* PCI revision, low byte of class word */
337 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
338 #ifdef CONFIG_PCIEAER
339 u16 aer_cap; /* AER capability offset */
340 struct aer_stats *aer_stats; /* AER stats for this device */
342 #ifdef CONFIG_PCIEPORTBUS
343 struct rcec_ea *rcec_ea; /* RCEC cached endpoint association */
344 struct pci_dev *rcec; /* Associated RCEC device */
346 u32 devcap; /* PCIe Device Capabilities */
347 u8 pcie_cap; /* PCIe capability offset */
348 u8 msi_cap; /* MSI capability offset */
349 u8 msix_cap; /* MSI-X capability offset */
350 u8 pcie_mpss:3; /* PCIe Max Payload Size Supported */
351 u8 rom_base_reg; /* Config register controlling ROM */
352 u8 pin; /* Interrupt pin this device uses */
353 u16 pcie_flags_reg; /* Cached PCIe Capabilities Register */
354 unsigned long *dma_alias_mask;/* Mask of enabled devfn aliases */
356 struct pci_driver *driver; /* Driver bound to this device */
357 u64 dma_mask; /* Mask of the bits of bus address this
358 device implements. Normally this is
359 0xffffffff. You only need to change
360 this if your device has broken DMA
361 or supports 64-bit transfers. */
363 struct device_dma_parameters dma_parms;
365 pci_power_t current_state; /* Current operating state. In ACPI,
366 this is D0-D3, D0 being fully
367 functional, and D3 being off. */
368 unsigned int imm_ready:1; /* Supports Immediate Readiness */
369 u8 pm_cap; /* PM capability offset */
370 unsigned int pme_support:5; /* Bitmask of states from which PME#
372 unsigned int pme_poll:1; /* Poll device's PME status bit */
373 unsigned int d1_support:1; /* Low power state D1 is supported */
374 unsigned int d2_support:1; /* Low power state D2 is supported */
375 unsigned int no_d1d2:1; /* D1 and D2 are forbidden */
376 unsigned int no_d3cold:1; /* D3cold is forbidden */
377 unsigned int bridge_d3:1; /* Allow D3 for bridge */
378 unsigned int d3cold_allowed:1; /* D3cold is allowed by user */
379 unsigned int mmio_always_on:1; /* Disallow turning off io/mem
380 decoding during BAR sizing */
381 unsigned int wakeup_prepared:1;
382 unsigned int runtime_d3cold:1; /* Whether go through runtime
383 D3cold, not set for devices
384 powered on/off by the
385 corresponding bridge */
386 unsigned int skip_bus_pm:1; /* Internal: Skip bus-level PM */
387 unsigned int ignore_hotplug:1; /* Ignore hotplug events */
388 unsigned int hotplug_user_indicators:1; /* SlotCtl indicators
389 controlled exclusively by
391 unsigned int clear_retrain_link:1; /* Need to clear Retrain Link
393 unsigned int d3hot_delay; /* D3hot->D0 transition time in ms */
394 unsigned int d3cold_delay; /* D3cold->D0 transition time in ms */
396 #ifdef CONFIG_PCIEASPM
397 struct pcie_link_state *link_state; /* ASPM link state */
398 unsigned int ltr_path:1; /* Latency Tolerance Reporting
399 supported from root to here */
400 u16 l1ss; /* L1SS Capability pointer */
402 unsigned int pasid_no_tlp:1; /* PASID works without TLP Prefix */
403 unsigned int eetlp_prefix_path:1; /* End-to-End TLP Prefix */
405 pci_channel_state_t error_state; /* Current connectivity state */
406 struct device dev; /* Generic device interface */
408 int cfg_size; /* Size of config space */
411 * Instead of touching interrupt line and base address registers
412 * directly, use the values stored here. They might be different!
415 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
417 bool match_driver; /* Skip attaching driver */
419 unsigned int transparent:1; /* Subtractive decode bridge */
420 unsigned int io_window:1; /* Bridge has I/O window */
421 unsigned int pref_window:1; /* Bridge has pref mem window */
422 unsigned int pref_64_window:1; /* Pref mem window is 64-bit */
423 unsigned int multifunction:1; /* Multi-function device */
425 unsigned int is_busmaster:1; /* Is busmaster */
426 unsigned int no_msi:1; /* May not use MSI */
427 unsigned int no_64bit_msi:1; /* May only use 32-bit MSIs */
428 unsigned int block_cfg_access:1; /* Config space access blocked */
429 unsigned int broken_parity_status:1; /* Generates false positive parity */
430 unsigned int irq_reroute_variant:2; /* Needs IRQ rerouting variant */
431 unsigned int msi_enabled:1;
432 unsigned int msix_enabled:1;
433 unsigned int ari_enabled:1; /* ARI forwarding */
434 unsigned int ats_enabled:1; /* Address Translation Svc */
435 unsigned int pasid_enabled:1; /* Process Address Space ID */
436 unsigned int pri_enabled:1; /* Page Request Interface */
437 unsigned int is_managed:1; /* Managed via devres */
438 unsigned int is_msi_managed:1; /* MSI release via devres installed */
439 unsigned int needs_freset:1; /* Requires fundamental reset */
440 unsigned int state_saved:1;
441 unsigned int is_physfn:1;
442 unsigned int is_virtfn:1;
443 unsigned int is_hotplug_bridge:1;
444 unsigned int shpc_managed:1; /* SHPC owned by shpchp */
445 unsigned int is_thunderbolt:1; /* Thunderbolt controller */
447 * Devices marked being untrusted are the ones that can potentially
448 * execute DMA attacks and similar. They are typically connected
449 * through external ports such as Thunderbolt but not limited to
450 * that. When an IOMMU is enabled they should be getting full
451 * mappings to make sure they cannot access arbitrary memory.
453 unsigned int untrusted:1;
455 * Info from the platform, e.g., ACPI or device tree, may mark a
456 * device as "external-facing". An external-facing device is
457 * itself internal but devices downstream from it are external.
459 unsigned int external_facing:1;
460 unsigned int broken_intx_masking:1; /* INTx masking can't be used */
461 unsigned int io_window_1k:1; /* Intel bridge 1K I/O windows */
462 unsigned int irq_managed:1;
463 unsigned int non_compliant_bars:1; /* Broken BARs; ignore them */
464 unsigned int is_probed:1; /* Device probing in progress */
465 unsigned int link_active_reporting:1;/* Device capable of reporting link active */
466 unsigned int no_vf_scan:1; /* Don't scan for VFs after IOV enablement */
467 unsigned int no_command_memory:1; /* No PCI_COMMAND_MEMORY */
468 unsigned int rom_bar_overlap:1; /* ROM BAR disable broken */
469 pci_dev_flags_t dev_flags;
470 atomic_t enable_cnt; /* pci_enable_device has been called */
472 u32 saved_config_space[16]; /* Config space saved at suspend time */
473 struct hlist_head saved_cap_space;
474 int rom_attr_enabled; /* Display of ROM attribute enabled? */
475 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
476 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
478 #ifdef CONFIG_HOTPLUG_PCI_PCIE
479 unsigned int broken_cmd_compl:1; /* No compl for some cmds */
481 #ifdef CONFIG_PCIE_PTM
482 unsigned int ptm_root:1;
483 unsigned int ptm_enabled:1;
486 #ifdef CONFIG_PCI_MSI
487 void __iomem *msix_base;
488 raw_spinlock_t msi_lock;
491 #ifdef CONFIG_PCIE_DPC
493 unsigned int dpc_rp_extensions:1;
496 #ifdef CONFIG_PCI_ATS
498 struct pci_sriov *sriov; /* PF: SR-IOV info */
499 struct pci_dev *physfn; /* VF: related PF */
501 u16 ats_cap; /* ATS Capability offset */
502 u8 ats_stu; /* ATS Smallest Translation Unit */
504 #ifdef CONFIG_PCI_PRI
505 u16 pri_cap; /* PRI Capability offset */
506 u32 pri_reqs_alloc; /* Number of PRI requests allocated */
507 unsigned int pasid_required:1; /* PRG Response PASID Required */
509 #ifdef CONFIG_PCI_PASID
510 u16 pasid_cap; /* PASID Capability offset */
513 #ifdef CONFIG_PCI_P2PDMA
514 struct pci_p2pdma __rcu *p2pdma;
516 u16 acs_cap; /* ACS Capability offset */
517 phys_addr_t rom; /* Physical address if not from BAR */
518 size_t romlen; /* Length if not from BAR */
519 char *driver_override; /* Driver name to force a match */
521 unsigned long priv_flags; /* Private flags for the PCI driver */
523 /* These methods index pci_reset_fn_methods[] */
524 u8 reset_methods[PCI_NUM_RESET_METHODS]; /* In priority order */
527 static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
529 #ifdef CONFIG_PCI_IOV
536 struct pci_dev *pci_alloc_dev(struct pci_bus *bus);
538 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
539 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
541 static inline int pci_channel_offline(struct pci_dev *pdev)
543 return (pdev->error_state != pci_channel_io_normal);
547 * Currently in ACPI spec, for each PCI host bridge, PCI Segment
548 * Group number is limited to a 16-bit value, therefore (int)-1 is
549 * not a valid PCI domain number, and can be used as a sentinel
550 * value indicating ->domain_nr is not set by the driver (and
551 * CONFIG_PCI_DOMAINS_GENERIC=y archs will set it with
552 * pci_bus_find_domain_nr()).
554 #define PCI_DOMAIN_NR_NOT_SET (-1)
556 struct pci_host_bridge {
558 struct pci_bus *bus; /* Root bus */
560 struct pci_ops *child_ops;
564 struct list_head windows; /* resource_entry */
565 struct list_head dma_ranges; /* dma ranges resource list */
566 u8 (*swizzle_irq)(struct pci_dev *, u8 *); /* Platform IRQ swizzler */
567 int (*map_irq)(const struct pci_dev *, u8, u8);
568 void (*release_fn)(struct pci_host_bridge *);
570 unsigned int ignore_reset_delay:1; /* For entire hierarchy */
571 unsigned int no_ext_tags:1; /* No Extended Tags */
572 unsigned int native_aer:1; /* OS may use PCIe AER */
573 unsigned int native_pcie_hotplug:1; /* OS may use PCIe hotplug */
574 unsigned int native_shpc_hotplug:1; /* OS may use SHPC hotplug */
575 unsigned int native_pme:1; /* OS may use PCIe PME */
576 unsigned int native_ltr:1; /* OS may use PCIe LTR */
577 unsigned int native_dpc:1; /* OS may use PCIe DPC */
578 unsigned int preserve_config:1; /* Preserve FW resource setup */
579 unsigned int size_windows:1; /* Enable root bus sizing */
580 unsigned int msi_domain:1; /* Bridge wants MSI domain */
582 /* Resource alignment requirements */
583 resource_size_t (*align_resource)(struct pci_dev *dev,
584 const struct resource *res,
585 resource_size_t start,
586 resource_size_t size,
587 resource_size_t align);
588 unsigned long private[] ____cacheline_aligned;
591 #define to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev)
593 static inline void *pci_host_bridge_priv(struct pci_host_bridge *bridge)
595 return (void *)bridge->private;
598 static inline struct pci_host_bridge *pci_host_bridge_from_priv(void *priv)
600 return container_of(priv, struct pci_host_bridge, private);
603 struct pci_host_bridge *pci_alloc_host_bridge(size_t priv);
604 struct pci_host_bridge *devm_pci_alloc_host_bridge(struct device *dev,
606 void pci_free_host_bridge(struct pci_host_bridge *bridge);
607 struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus);
609 void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
610 void (*release_fn)(struct pci_host_bridge *),
613 int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge);
616 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
617 * to P2P or CardBus bridge windows) go in a table. Additional ones (for
618 * buses below host bridges or subtractive decode bridges) go in the list.
619 * Use pci_bus_for_each_resource() to iterate through all the resources.
623 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly
624 * and there's no way to program the bridge with the details of the window.
625 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive-
626 * decode bit set, because they are explicit and can be programmed with _SRS.
628 #define PCI_SUBTRACTIVE_DECODE 0x1
630 struct pci_bus_resource {
631 struct list_head list;
632 struct resource *res;
636 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
639 struct list_head node; /* Node in list of buses */
640 struct pci_bus *parent; /* Parent bus this bridge is on */
641 struct list_head children; /* List of child buses */
642 struct list_head devices; /* List of devices on this bus */
643 struct pci_dev *self; /* Bridge device as seen by parent */
644 struct list_head slots; /* List of slots on this bus;
645 protected by pci_slot_mutex */
646 struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
647 struct list_head resources; /* Address space routed to this bus */
648 struct resource busn_res; /* Bus numbers routed to this bus */
650 struct pci_ops *ops; /* Configuration access functions */
651 void *sysdata; /* Hook for sys-specific extension */
652 struct proc_dir_entry *procdir; /* Directory entry in /proc/bus/pci */
654 unsigned char number; /* Bus number */
655 unsigned char primary; /* Number of primary bridge */
656 unsigned char max_bus_speed; /* enum pci_bus_speed */
657 unsigned char cur_bus_speed; /* enum pci_bus_speed */
658 #ifdef CONFIG_PCI_DOMAINS_GENERIC
664 unsigned short bridge_ctl; /* Manage NO_ISA/FBB/et al behaviors */
665 pci_bus_flags_t bus_flags; /* Inherited by child buses */
666 struct device *bridge;
668 struct bin_attribute *legacy_io; /* Legacy I/O for this bus */
669 struct bin_attribute *legacy_mem; /* Legacy mem */
670 unsigned int is_added:1;
671 unsigned int unsafe_warn:1; /* warned about RW1C config write */
674 #define to_pci_bus(n) container_of(n, struct pci_bus, dev)
676 static inline u16 pci_dev_id(struct pci_dev *dev)
678 return PCI_DEVID(dev->bus->number, dev->devfn);
682 * Returns true if the PCI bus is root (behind host-PCI bridge),
685 * Some code assumes that "bus->self == NULL" means that bus is a root bus.
686 * This is incorrect because "virtual" buses added for SR-IOV (via
687 * virtfn_add_bus()) have "bus->self == NULL" but are not root buses.
689 static inline bool pci_is_root_bus(struct pci_bus *pbus)
691 return !(pbus->parent);
695 * pci_is_bridge - check if the PCI device is a bridge
698 * Return true if the PCI device is bridge whether it has subordinate
701 static inline bool pci_is_bridge(struct pci_dev *dev)
703 return dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
704 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS;
707 #define for_each_pci_bridge(dev, bus) \
708 list_for_each_entry(dev, &bus->devices, bus_list) \
709 if (!pci_is_bridge(dev)) {} else
711 static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev)
713 dev = pci_physfn(dev);
714 if (pci_is_root_bus(dev->bus))
717 return dev->bus->self;
720 #ifdef CONFIG_PCI_MSI
721 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
723 return pci_dev->msi_enabled || pci_dev->msix_enabled;
726 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
729 /* Error values that may be returned by PCI functions */
730 #define PCIBIOS_SUCCESSFUL 0x00
731 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
732 #define PCIBIOS_BAD_VENDOR_ID 0x83
733 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
734 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
735 #define PCIBIOS_SET_FAILED 0x88
736 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
738 /* Translate above to generic errno for passing back through non-PCI code */
739 static inline int pcibios_err_to_errno(int err)
741 if (err <= PCIBIOS_SUCCESSFUL)
742 return err; /* Assume already errno */
745 case PCIBIOS_FUNC_NOT_SUPPORTED:
747 case PCIBIOS_BAD_VENDOR_ID:
749 case PCIBIOS_DEVICE_NOT_FOUND:
751 case PCIBIOS_BAD_REGISTER_NUMBER:
753 case PCIBIOS_SET_FAILED:
755 case PCIBIOS_BUFFER_TOO_SMALL:
762 /* Low-level architecture-dependent routines */
765 int (*add_bus)(struct pci_bus *bus);
766 void (*remove_bus)(struct pci_bus *bus);
767 void __iomem *(*map_bus)(struct pci_bus *bus, unsigned int devfn, int where);
768 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
769 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
773 * ACPI needs to be able to access PCI config space before we've done a
774 * PCI bus scan and created pci_bus structures.
776 int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
777 int reg, int len, u32 *val);
778 int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
779 int reg, int len, u32 val);
781 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
782 typedef u64 pci_bus_addr_t;
784 typedef u32 pci_bus_addr_t;
787 struct pci_bus_region {
788 pci_bus_addr_t start;
793 spinlock_t lock; /* Protects list, index */
794 struct list_head list; /* For IDs added at runtime */
799 * PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
800 * a set of callbacks in struct pci_error_handlers, that device driver
801 * will be notified of PCI bus errors, and will be driven to recovery
802 * when an error occurs.
805 typedef unsigned int __bitwise pci_ers_result_t;
807 enum pci_ers_result {
808 /* No result/none/not supported in device driver */
809 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
811 /* Device driver can recover without slot reset */
812 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
814 /* Device driver wants slot to be reset */
815 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
817 /* Device has completely failed, is unrecoverable */
818 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
820 /* Device driver is fully recovered and operational */
821 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
823 /* No AER capabilities registered for the driver */
824 PCI_ERS_RESULT_NO_AER_DRIVER = (__force pci_ers_result_t) 6,
827 /* PCI bus error event callbacks */
828 struct pci_error_handlers {
829 /* PCI bus error detected on this device */
830 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
831 pci_channel_state_t error);
833 /* MMIO has been re-enabled, but not DMA */
834 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
836 /* PCI slot has been reset */
837 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
839 /* PCI function reset prepare or completed */
840 void (*reset_prepare)(struct pci_dev *dev);
841 void (*reset_done)(struct pci_dev *dev);
843 /* Device driver may resume normal operations */
844 void (*resume)(struct pci_dev *dev);
851 * struct pci_driver - PCI driver structure
852 * @node: List of driver structures.
853 * @name: Driver name.
854 * @id_table: Pointer to table of device IDs the driver is
855 * interested in. Most drivers should export this
856 * table using MODULE_DEVICE_TABLE(pci,...).
857 * @probe: This probing function gets called (during execution
858 * of pci_register_driver() for already existing
859 * devices or later if a new device gets inserted) for
860 * all PCI devices which match the ID table and are not
861 * "owned" by the other drivers yet. This function gets
862 * passed a "struct pci_dev \*" for each device whose
863 * entry in the ID table matches the device. The probe
864 * function returns zero when the driver chooses to
865 * take "ownership" of the device or an error code
866 * (negative number) otherwise.
867 * The probe function always gets called from process
868 * context, so it can sleep.
869 * @remove: The remove() function gets called whenever a device
870 * being handled by this driver is removed (either during
871 * deregistration of the driver or when it's manually
872 * pulled out of a hot-pluggable slot).
873 * The remove function always gets called from process
874 * context, so it can sleep.
875 * @suspend: Put device into low power state.
876 * @resume: Wake device from low power state.
877 * (Please see Documentation/power/pci.rst for descriptions
878 * of PCI Power Management and the related functions.)
879 * @shutdown: Hook into reboot_notifier_list (kernel/sys.c).
880 * Intended to stop any idling DMA operations.
881 * Useful for enabling wake-on-lan (NIC) or changing
882 * the power state of a device before reboot.
883 * e.g. drivers/net/e100.c.
884 * @sriov_configure: Optional driver callback to allow configuration of
885 * number of VFs to enable via sysfs "sriov_numvfs" file.
886 * @sriov_set_msix_vec_count: PF Driver callback to change number of MSI-X
887 * vectors on a VF. Triggered via sysfs "sriov_vf_msix_count".
888 * This will change MSI-X Table Size in the VF Message Control
890 * @sriov_get_vf_total_msix: PF driver callback to get the total number of
891 * MSI-X vectors available for distribution to the VFs.
892 * @err_handler: See Documentation/PCI/pci-error-recovery.rst
893 * @groups: Sysfs attribute groups.
894 * @dev_groups: Attributes attached to the device that will be
895 * created once it is bound to the driver.
896 * @driver: Driver model structure.
897 * @dynids: List of dynamically added device IDs.
900 struct list_head node;
902 const struct pci_device_id *id_table; /* Must be non-NULL for probe to be called */
903 int (*probe)(struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
904 void (*remove)(struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
905 int (*suspend)(struct pci_dev *dev, pm_message_t state); /* Device suspended */
906 int (*resume)(struct pci_dev *dev); /* Device woken up */
907 void (*shutdown)(struct pci_dev *dev);
908 int (*sriov_configure)(struct pci_dev *dev, int num_vfs); /* On PF */
909 int (*sriov_set_msix_vec_count)(struct pci_dev *vf, int msix_vec_count); /* On PF */
910 u32 (*sriov_get_vf_total_msix)(struct pci_dev *pf);
911 const struct pci_error_handlers *err_handler;
912 const struct attribute_group **groups;
913 const struct attribute_group **dev_groups;
914 struct device_driver driver;
915 struct pci_dynids dynids;
918 static inline struct pci_driver *to_pci_driver(struct device_driver *drv)
920 return drv ? container_of(drv, struct pci_driver, driver) : NULL;
924 * PCI_DEVICE - macro used to describe a specific PCI device
925 * @vend: the 16 bit PCI Vendor ID
926 * @dev: the 16 bit PCI Device ID
928 * This macro is used to create a struct pci_device_id that matches a
929 * specific device. The subvendor and subdevice fields will be set to
932 #define PCI_DEVICE(vend,dev) \
933 .vendor = (vend), .device = (dev), \
934 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
937 * PCI_DEVICE_DRIVER_OVERRIDE - macro used to describe a PCI device with
938 * override_only flags.
939 * @vend: the 16 bit PCI Vendor ID
940 * @dev: the 16 bit PCI Device ID
941 * @driver_override: the 32 bit PCI Device override_only
943 * This macro is used to create a struct pci_device_id that matches only a
944 * driver_override device. The subvendor and subdevice fields will be set to
947 #define PCI_DEVICE_DRIVER_OVERRIDE(vend, dev, driver_override) \
948 .vendor = (vend), .device = (dev), .subvendor = PCI_ANY_ID, \
949 .subdevice = PCI_ANY_ID, .override_only = (driver_override)
952 * PCI_DRIVER_OVERRIDE_DEVICE_VFIO - macro used to describe a VFIO
953 * "driver_override" PCI device.
954 * @vend: the 16 bit PCI Vendor ID
955 * @dev: the 16 bit PCI Device ID
957 * This macro is used to create a struct pci_device_id that matches a
958 * specific device. The subvendor and subdevice fields will be set to
959 * PCI_ANY_ID and the driver_override will be set to
960 * PCI_ID_F_VFIO_DRIVER_OVERRIDE.
962 #define PCI_DRIVER_OVERRIDE_DEVICE_VFIO(vend, dev) \
963 PCI_DEVICE_DRIVER_OVERRIDE(vend, dev, PCI_ID_F_VFIO_DRIVER_OVERRIDE)
966 * PCI_DEVICE_SUB - macro used to describe a specific PCI device with subsystem
967 * @vend: the 16 bit PCI Vendor ID
968 * @dev: the 16 bit PCI Device ID
969 * @subvend: the 16 bit PCI Subvendor ID
970 * @subdev: the 16 bit PCI Subdevice ID
972 * This macro is used to create a struct pci_device_id that matches a
973 * specific device with subsystem information.
975 #define PCI_DEVICE_SUB(vend, dev, subvend, subdev) \
976 .vendor = (vend), .device = (dev), \
977 .subvendor = (subvend), .subdevice = (subdev)
980 * PCI_DEVICE_CLASS - macro used to describe a specific PCI device class
981 * @dev_class: the class, subclass, prog-if triple for this device
982 * @dev_class_mask: the class mask for this device
984 * This macro is used to create a struct pci_device_id that matches a
985 * specific PCI class. The vendor, device, subvendor, and subdevice
986 * fields will be set to PCI_ANY_ID.
988 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
989 .class = (dev_class), .class_mask = (dev_class_mask), \
990 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
991 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
994 * PCI_VDEVICE - macro used to describe a specific PCI device in short form
995 * @vend: the vendor name
996 * @dev: the 16 bit PCI Device ID
998 * This macro is used to create a struct pci_device_id that matches a
999 * specific PCI device. The subvendor, and subdevice fields will be set
1000 * to PCI_ANY_ID. The macro allows the next field to follow as the device
1003 #define PCI_VDEVICE(vend, dev) \
1004 .vendor = PCI_VENDOR_ID_##vend, .device = (dev), \
1005 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0
1008 * PCI_DEVICE_DATA - macro used to describe a specific PCI device in very short form
1009 * @vend: the vendor name (without PCI_VENDOR_ID_ prefix)
1010 * @dev: the device name (without PCI_DEVICE_ID_<vend>_ prefix)
1011 * @data: the driver data to be filled
1013 * This macro is used to create a struct pci_device_id that matches a
1014 * specific PCI device. The subvendor, and subdevice fields will be set
1017 #define PCI_DEVICE_DATA(vend, dev, data) \
1018 .vendor = PCI_VENDOR_ID_##vend, .device = PCI_DEVICE_ID_##vend##_##dev, \
1019 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0, \
1020 .driver_data = (kernel_ulong_t)(data)
1023 PCI_REASSIGN_ALL_RSRC = 0x00000001, /* Ignore firmware setup */
1024 PCI_REASSIGN_ALL_BUS = 0x00000002, /* Reassign all bus numbers */
1025 PCI_PROBE_ONLY = 0x00000004, /* Use existing setup */
1026 PCI_CAN_SKIP_ISA_ALIGN = 0x00000008, /* Don't do ISA alignment */
1027 PCI_ENABLE_PROC_DOMAINS = 0x00000010, /* Enable domains in /proc */
1028 PCI_COMPAT_DOMAIN_0 = 0x00000020, /* ... except domain 0 */
1029 PCI_SCAN_ALL_PCIE_DEVS = 0x00000040, /* Scan all, not just dev 0 */
1032 #define PCI_IRQ_LEGACY (1 << 0) /* Allow legacy interrupts */
1033 #define PCI_IRQ_MSI (1 << 1) /* Allow MSI interrupts */
1034 #define PCI_IRQ_MSIX (1 << 2) /* Allow MSI-X interrupts */
1035 #define PCI_IRQ_AFFINITY (1 << 3) /* Auto-assign affinity */
1037 /* These external functions are only available when PCI support is enabled */
1040 extern unsigned int pci_flags;
1042 static inline void pci_set_flags(int flags) { pci_flags = flags; }
1043 static inline void pci_add_flags(int flags) { pci_flags |= flags; }
1044 static inline void pci_clear_flags(int flags) { pci_flags &= ~flags; }
1045 static inline int pci_has_flag(int flag) { return pci_flags & flag; }
1047 void pcie_bus_configure_settings(struct pci_bus *bus);
1049 enum pcie_bus_config_types {
1050 PCIE_BUS_TUNE_OFF, /* Don't touch MPS at all */
1051 PCIE_BUS_DEFAULT, /* Ensure MPS matches upstream bridge */
1052 PCIE_BUS_SAFE, /* Use largest MPS boot-time devices support */
1053 PCIE_BUS_PERFORMANCE, /* Use MPS and MRRS for best performance */
1054 PCIE_BUS_PEER2PEER, /* Set MPS = 128 for all devices */
1057 extern enum pcie_bus_config_types pcie_bus_config;
1059 extern struct bus_type pci_bus_type;
1061 /* Do NOT directly access these two variables, unless you are arch-specific PCI
1062 * code, or PCI core code. */
1063 extern struct list_head pci_root_buses; /* List of all known PCI buses */
1064 /* Some device drivers need know if PCI is initiated */
1065 int no_pci_devices(void);
1067 void pcibios_resource_survey_bus(struct pci_bus *bus);
1068 void pcibios_bus_add_device(struct pci_dev *pdev);
1069 void pcibios_add_bus(struct pci_bus *bus);
1070 void pcibios_remove_bus(struct pci_bus *bus);
1071 void pcibios_fixup_bus(struct pci_bus *);
1072 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
1073 /* Architecture-specific versions may override this (weak) */
1074 char *pcibios_setup(char *str);
1076 /* Used only when drivers/pci/setup.c is used */
1077 resource_size_t pcibios_align_resource(void *, const struct resource *,
1081 /* Weak but can be overridden by arch */
1082 void pci_fixup_cardbus(struct pci_bus *);
1084 /* Generic PCI functions used internally */
1086 void pcibios_resource_to_bus(struct pci_bus *bus, struct pci_bus_region *region,
1087 struct resource *res);
1088 void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
1089 struct pci_bus_region *region);
1090 void pcibios_scan_specific_bus(int busn);
1091 struct pci_bus *pci_find_bus(int domain, int busnr);
1092 void pci_bus_add_devices(const struct pci_bus *bus);
1093 struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
1094 struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
1095 struct pci_ops *ops, void *sysdata,
1096 struct list_head *resources);
1097 int pci_host_probe(struct pci_host_bridge *bridge);
1098 int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
1099 int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax);
1100 void pci_bus_release_busn_res(struct pci_bus *b);
1101 struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
1102 struct pci_ops *ops, void *sysdata,
1103 struct list_head *resources);
1104 int pci_scan_root_bus_bridge(struct pci_host_bridge *bridge);
1105 struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
1107 struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
1109 struct hotplug_slot *hotplug);
1110 void pci_destroy_slot(struct pci_slot *slot);
1112 void pci_dev_assign_slot(struct pci_dev *dev);
1114 static inline void pci_dev_assign_slot(struct pci_dev *dev) { }
1116 int pci_scan_slot(struct pci_bus *bus, int devfn);
1117 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
1118 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
1119 unsigned int pci_scan_child_bus(struct pci_bus *bus);
1120 void pci_bus_add_device(struct pci_dev *dev);
1121 void pci_read_bridge_bases(struct pci_bus *child);
1122 struct resource *pci_find_parent_resource(const struct pci_dev *dev,
1123 struct resource *res);
1124 u8 pci_swizzle_interrupt_pin(const struct pci_dev *dev, u8 pin);
1125 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
1126 u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
1127 struct pci_dev *pci_dev_get(struct pci_dev *dev);
1128 void pci_dev_put(struct pci_dev *dev);
1129 void pci_remove_bus(struct pci_bus *b);
1130 void pci_stop_and_remove_bus_device(struct pci_dev *dev);
1131 void pci_stop_and_remove_bus_device_locked(struct pci_dev *dev);
1132 void pci_stop_root_bus(struct pci_bus *bus);
1133 void pci_remove_root_bus(struct pci_bus *bus);
1134 void pci_setup_cardbus(struct pci_bus *bus);
1135 void pcibios_setup_bridge(struct pci_bus *bus, unsigned long type);
1136 void pci_sort_breadthfirst(void);
1137 #define dev_is_pci(d) ((d)->bus == &pci_bus_type)
1138 #define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false))
1140 /* Generic PCI functions exported to card drivers */
1142 u8 pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
1143 u8 pci_find_capability(struct pci_dev *dev, int cap);
1144 u8 pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
1145 u8 pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
1146 u8 pci_find_next_ht_capability(struct pci_dev *dev, u8 pos, int ht_cap);
1147 u16 pci_find_ext_capability(struct pci_dev *dev, int cap);
1148 u16 pci_find_next_ext_capability(struct pci_dev *dev, u16 pos, int cap);
1149 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
1150 u16 pci_find_vsec_capability(struct pci_dev *dev, u16 vendor, int cap);
1151 u16 pci_find_dvsec_capability(struct pci_dev *dev, u16 vendor, u16 dvsec);
1153 u64 pci_get_dsn(struct pci_dev *dev);
1155 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
1156 struct pci_dev *from);
1157 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
1158 unsigned int ss_vendor, unsigned int ss_device,
1159 struct pci_dev *from);
1160 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
1161 struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
1162 unsigned int devfn);
1163 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
1164 int pci_dev_present(const struct pci_device_id *ids);
1166 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
1167 int where, u8 *val);
1168 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
1169 int where, u16 *val);
1170 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
1171 int where, u32 *val);
1172 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
1174 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
1175 int where, u16 val);
1176 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
1177 int where, u32 val);
1179 int pci_generic_config_read(struct pci_bus *bus, unsigned int devfn,
1180 int where, int size, u32 *val);
1181 int pci_generic_config_write(struct pci_bus *bus, unsigned int devfn,
1182 int where, int size, u32 val);
1183 int pci_generic_config_read32(struct pci_bus *bus, unsigned int devfn,
1184 int where, int size, u32 *val);
1185 int pci_generic_config_write32(struct pci_bus *bus, unsigned int devfn,
1186 int where, int size, u32 val);
1188 struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
1190 int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val);
1191 int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val);
1192 int pci_read_config_dword(const struct pci_dev *dev, int where, u32 *val);
1193 int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val);
1194 int pci_write_config_word(const struct pci_dev *dev, int where, u16 val);
1195 int pci_write_config_dword(const struct pci_dev *dev, int where, u32 val);
1197 int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val);
1198 int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val);
1199 int pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val);
1200 int pcie_capability_write_dword(struct pci_dev *dev, int pos, u32 val);
1201 int pcie_capability_clear_and_set_word(struct pci_dev *dev, int pos,
1202 u16 clear, u16 set);
1203 int pcie_capability_clear_and_set_dword(struct pci_dev *dev, int pos,
1204 u32 clear, u32 set);
1206 static inline int pcie_capability_set_word(struct pci_dev *dev, int pos,
1209 return pcie_capability_clear_and_set_word(dev, pos, 0, set);
1212 static inline int pcie_capability_set_dword(struct pci_dev *dev, int pos,
1215 return pcie_capability_clear_and_set_dword(dev, pos, 0, set);
1218 static inline int pcie_capability_clear_word(struct pci_dev *dev, int pos,
1221 return pcie_capability_clear_and_set_word(dev, pos, clear, 0);
1224 static inline int pcie_capability_clear_dword(struct pci_dev *dev, int pos,
1227 return pcie_capability_clear_and_set_dword(dev, pos, clear, 0);
1230 /* User-space driven config access */
1231 int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
1232 int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
1233 int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val);
1234 int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val);
1235 int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val);
1236 int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val);
1238 int __must_check pci_enable_device(struct pci_dev *dev);
1239 int __must_check pci_enable_device_io(struct pci_dev *dev);
1240 int __must_check pci_enable_device_mem(struct pci_dev *dev);
1241 int __must_check pci_reenable_device(struct pci_dev *);
1242 int __must_check pcim_enable_device(struct pci_dev *pdev);
1243 void pcim_pin_device(struct pci_dev *pdev);
1245 static inline bool pci_intx_mask_supported(struct pci_dev *pdev)
1248 * INTx masking is supported if PCI_COMMAND_INTX_DISABLE is
1249 * writable and no quirk has marked the feature broken.
1251 return !pdev->broken_intx_masking;
1254 static inline int pci_is_enabled(struct pci_dev *pdev)
1256 return (atomic_read(&pdev->enable_cnt) > 0);
1259 static inline int pci_is_managed(struct pci_dev *pdev)
1261 return pdev->is_managed;
1264 void pci_disable_device(struct pci_dev *dev);
1266 extern unsigned int pcibios_max_latency;
1267 void pci_set_master(struct pci_dev *dev);
1268 void pci_clear_master(struct pci_dev *dev);
1270 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
1271 int pci_set_cacheline_size(struct pci_dev *dev);
1272 int __must_check pci_set_mwi(struct pci_dev *dev);
1273 int __must_check pcim_set_mwi(struct pci_dev *dev);
1274 int pci_try_set_mwi(struct pci_dev *dev);
1275 void pci_clear_mwi(struct pci_dev *dev);
1276 void pci_disable_parity(struct pci_dev *dev);
1277 void pci_intx(struct pci_dev *dev, int enable);
1278 bool pci_check_and_mask_intx(struct pci_dev *dev);
1279 bool pci_check_and_unmask_intx(struct pci_dev *dev);
1280 int pci_wait_for_pending(struct pci_dev *dev, int pos, u16 mask);
1281 int pci_wait_for_pending_transaction(struct pci_dev *dev);
1282 int pcix_get_max_mmrbc(struct pci_dev *dev);
1283 int pcix_get_mmrbc(struct pci_dev *dev);
1284 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
1285 int pcie_get_readrq(struct pci_dev *dev);
1286 int pcie_set_readrq(struct pci_dev *dev, int rq);
1287 int pcie_get_mps(struct pci_dev *dev);
1288 int pcie_set_mps(struct pci_dev *dev, int mps);
1289 u32 pcie_bandwidth_available(struct pci_dev *dev, struct pci_dev **limiting_dev,
1290 enum pci_bus_speed *speed,
1291 enum pcie_link_width *width);
1292 void pcie_print_link_status(struct pci_dev *dev);
1293 int pcie_reset_flr(struct pci_dev *dev, bool probe);
1294 int pcie_flr(struct pci_dev *dev);
1295 int __pci_reset_function_locked(struct pci_dev *dev);
1296 int pci_reset_function(struct pci_dev *dev);
1297 int pci_reset_function_locked(struct pci_dev *dev);
1298 int pci_try_reset_function(struct pci_dev *dev);
1299 int pci_probe_reset_slot(struct pci_slot *slot);
1300 int pci_probe_reset_bus(struct pci_bus *bus);
1301 int pci_reset_bus(struct pci_dev *dev);
1302 void pci_reset_secondary_bus(struct pci_dev *dev);
1303 void pcibios_reset_secondary_bus(struct pci_dev *dev);
1304 void pci_update_resource(struct pci_dev *dev, int resno);
1305 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
1306 int __must_check pci_reassign_resource(struct pci_dev *dev, int i, resource_size_t add_size, resource_size_t align);
1307 void pci_release_resource(struct pci_dev *dev, int resno);
1308 static inline int pci_rebar_bytes_to_size(u64 bytes)
1310 bytes = roundup_pow_of_two(bytes);
1312 /* Return BAR size as defined in the resizable BAR specification */
1313 return max(ilog2(bytes), 20) - 20;
1316 u32 pci_rebar_get_possible_sizes(struct pci_dev *pdev, int bar);
1317 int __must_check pci_resize_resource(struct pci_dev *dev, int i, int size);
1318 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
1319 bool pci_device_is_present(struct pci_dev *pdev);
1320 void pci_ignore_hotplug(struct pci_dev *dev);
1321 struct pci_dev *pci_real_dma_dev(struct pci_dev *dev);
1322 int pci_status_get_and_clear_errors(struct pci_dev *pdev);
1324 int __printf(6, 7) pci_request_irq(struct pci_dev *dev, unsigned int nr,
1325 irq_handler_t handler, irq_handler_t thread_fn, void *dev_id,
1326 const char *fmt, ...);
1327 void pci_free_irq(struct pci_dev *dev, unsigned int nr, void *dev_id);
1329 /* ROM control related routines */
1330 int pci_enable_rom(struct pci_dev *pdev);
1331 void pci_disable_rom(struct pci_dev *pdev);
1332 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
1333 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
1335 /* Power management related routines */
1336 int pci_save_state(struct pci_dev *dev);
1337 void pci_restore_state(struct pci_dev *dev);
1338 struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev);
1339 int pci_load_saved_state(struct pci_dev *dev,
1340 struct pci_saved_state *state);
1341 int pci_load_and_free_saved_state(struct pci_dev *dev,
1342 struct pci_saved_state **state);
1343 int pci_platform_power_transition(struct pci_dev *dev, pci_power_t state);
1344 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
1345 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
1346 bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
1347 void pci_pme_active(struct pci_dev *dev, bool enable);
1348 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable);
1349 int pci_wake_from_d3(struct pci_dev *dev, bool enable);
1350 int pci_prepare_to_sleep(struct pci_dev *dev);
1351 int pci_back_from_sleep(struct pci_dev *dev);
1352 bool pci_dev_run_wake(struct pci_dev *dev);
1353 void pci_d3cold_enable(struct pci_dev *dev);
1354 void pci_d3cold_disable(struct pci_dev *dev);
1355 bool pcie_relaxed_ordering_enabled(struct pci_dev *dev);
1356 void pci_resume_bus(struct pci_bus *bus);
1357 void pci_bus_set_current_state(struct pci_bus *bus, pci_power_t state);
1359 /* For use by arch with custom probe code */
1360 void set_pcie_port_type(struct pci_dev *pdev);
1361 void set_pcie_hotplug_bridge(struct pci_dev *pdev);
1363 /* Functions for PCI Hotplug drivers to use */
1364 unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge);
1365 unsigned int pci_rescan_bus(struct pci_bus *bus);
1366 void pci_lock_rescan_remove(void);
1367 void pci_unlock_rescan_remove(void);
1369 /* Vital Product Data routines */
1370 ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
1371 ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
1372 ssize_t pci_read_vpd_any(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
1373 ssize_t pci_write_vpd_any(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
1375 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
1376 resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx);
1377 void pci_bus_assign_resources(const struct pci_bus *bus);
1378 void pci_bus_claim_resources(struct pci_bus *bus);
1379 void pci_bus_size_bridges(struct pci_bus *bus);
1380 int pci_claim_resource(struct pci_dev *, int);
1381 int pci_claim_bridge_resource(struct pci_dev *bridge, int i);
1382 void pci_assign_unassigned_resources(void);
1383 void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
1384 void pci_assign_unassigned_bus_resources(struct pci_bus *bus);
1385 void pci_assign_unassigned_root_bus_resources(struct pci_bus *bus);
1386 int pci_reassign_bridge_resources(struct pci_dev *bridge, unsigned long type);
1387 void pdev_enable_device(struct pci_dev *);
1388 int pci_enable_resources(struct pci_dev *, int mask);
1389 void pci_assign_irq(struct pci_dev *dev);
1390 struct resource *pci_find_resource(struct pci_dev *dev, struct resource *res);
1391 #define HAVE_PCI_REQ_REGIONS 2
1392 int __must_check pci_request_regions(struct pci_dev *, const char *);
1393 int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
1394 void pci_release_regions(struct pci_dev *);
1395 int __must_check pci_request_region(struct pci_dev *, int, const char *);
1396 void pci_release_region(struct pci_dev *, int);
1397 int pci_request_selected_regions(struct pci_dev *, int, const char *);
1398 int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
1399 void pci_release_selected_regions(struct pci_dev *, int);
1401 /* drivers/pci/bus.c */
1402 void pci_add_resource(struct list_head *resources, struct resource *res);
1403 void pci_add_resource_offset(struct list_head *resources, struct resource *res,
1404 resource_size_t offset);
1405 void pci_free_resource_list(struct list_head *resources);
1406 void pci_bus_add_resource(struct pci_bus *bus, struct resource *res,
1407 unsigned int flags);
1408 struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n);
1409 void pci_bus_remove_resources(struct pci_bus *bus);
1410 int devm_request_pci_bus_resources(struct device *dev,
1411 struct list_head *resources);
1413 /* Temporary until new and working PCI SBR API in place */
1414 int pci_bridge_secondary_bus_reset(struct pci_dev *dev);
1416 #define pci_bus_for_each_resource(bus, res, i) \
1418 (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
1421 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
1422 struct resource *res, resource_size_t size,
1423 resource_size_t align, resource_size_t min,
1424 unsigned long type_mask,
1425 resource_size_t (*alignf)(void *,
1426 const struct resource *,
1432 int pci_register_io_range(struct fwnode_handle *fwnode, phys_addr_t addr,
1433 resource_size_t size);
1434 unsigned long pci_address_to_pio(phys_addr_t addr);
1435 phys_addr_t pci_pio_to_address(unsigned long pio);
1436 int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr);
1437 int devm_pci_remap_iospace(struct device *dev, const struct resource *res,
1438 phys_addr_t phys_addr);
1439 void pci_unmap_iospace(struct resource *res);
1440 void __iomem *devm_pci_remap_cfgspace(struct device *dev,
1441 resource_size_t offset,
1442 resource_size_t size);
1443 void __iomem *devm_pci_remap_cfg_resource(struct device *dev,
1444 struct resource *res);
1446 static inline pci_bus_addr_t pci_bus_address(struct pci_dev *pdev, int bar)
1448 struct pci_bus_region region;
1450 pcibios_resource_to_bus(pdev->bus, ®ion, &pdev->resource[bar]);
1451 return region.start;
1454 /* Proper probing supporting hot-pluggable devices */
1455 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
1456 const char *mod_name);
1458 /* pci_register_driver() must be a macro so KBUILD_MODNAME can be expanded */
1459 #define pci_register_driver(driver) \
1460 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
1462 void pci_unregister_driver(struct pci_driver *dev);
1465 * module_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 module
1469 * init/exit. This eliminates a lot of boilerplate. Each module may only
1470 * use this macro once, and calling it replaces module_init() and module_exit()
1472 #define module_pci_driver(__pci_driver) \
1473 module_driver(__pci_driver, pci_register_driver, pci_unregister_driver)
1476 * builtin_pci_driver() - Helper macro for registering a PCI driver
1477 * @__pci_driver: pci_driver struct
1479 * Helper macro for PCI drivers which do not do anything special in their
1480 * init code. This eliminates a lot of boilerplate. Each driver may only
1481 * use this macro once, and calling it replaces device_initcall(...)
1483 #define builtin_pci_driver(__pci_driver) \
1484 builtin_driver(__pci_driver, pci_register_driver)
1486 struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
1487 int pci_add_dynid(struct pci_driver *drv,
1488 unsigned int vendor, unsigned int device,
1489 unsigned int subvendor, unsigned int subdevice,
1490 unsigned int class, unsigned int class_mask,
1491 unsigned long driver_data);
1492 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
1493 struct pci_dev *dev);
1494 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
1497 void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
1499 int pci_cfg_space_size(struct pci_dev *dev);
1500 unsigned char pci_bus_max_busnr(struct pci_bus *bus);
1501 void pci_setup_bridge(struct pci_bus *bus);
1502 resource_size_t pcibios_window_alignment(struct pci_bus *bus,
1503 unsigned long type);
1505 #define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
1506 #define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)
1508 int pci_set_vga_state(struct pci_dev *pdev, bool decode,
1509 unsigned int command_bits, u32 flags);
1512 * Virtual interrupts allow for more interrupts to be allocated
1513 * than the device has interrupts for. These are not programmed
1514 * into the device's MSI-X table and must be handled by some
1515 * other driver means.
1517 #define PCI_IRQ_VIRTUAL (1 << 4)
1519 #define PCI_IRQ_ALL_TYPES \
1520 (PCI_IRQ_LEGACY | PCI_IRQ_MSI | PCI_IRQ_MSIX)
1522 #include <linux/dmapool.h>
1525 u32 vector; /* Kernel uses to write allocated vector */
1526 u16 entry; /* Driver uses to specify entry, OS writes */
1529 #ifdef CONFIG_PCI_MSI
1530 int pci_msi_vec_count(struct pci_dev *dev);
1531 void pci_disable_msi(struct pci_dev *dev);
1532 int pci_msix_vec_count(struct pci_dev *dev);
1533 void pci_disable_msix(struct pci_dev *dev);
1534 void pci_restore_msi_state(struct pci_dev *dev);
1535 int pci_msi_enabled(void);
1536 int pci_enable_msi(struct pci_dev *dev);
1537 int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
1538 int minvec, int maxvec);
1539 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1540 struct msix_entry *entries, int nvec)
1542 int rc = pci_enable_msix_range(dev, entries, nvec, nvec);
1547 int pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1548 unsigned int max_vecs, unsigned int flags,
1549 struct irq_affinity *affd);
1551 void pci_free_irq_vectors(struct pci_dev *dev);
1552 int pci_irq_vector(struct pci_dev *dev, unsigned int nr);
1553 const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev, int vec);
1556 static inline int pci_msi_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1557 static inline void pci_disable_msi(struct pci_dev *dev) { }
1558 static inline int pci_msix_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1559 static inline void pci_disable_msix(struct pci_dev *dev) { }
1560 static inline void pci_restore_msi_state(struct pci_dev *dev) { }
1561 static inline int pci_msi_enabled(void) { return 0; }
1562 static inline int pci_enable_msi(struct pci_dev *dev)
1564 static inline int pci_enable_msix_range(struct pci_dev *dev,
1565 struct msix_entry *entries, int minvec, int maxvec)
1567 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1568 struct msix_entry *entries, int nvec)
1572 pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1573 unsigned int max_vecs, unsigned int flags,
1574 struct irq_affinity *aff_desc)
1576 if ((flags & PCI_IRQ_LEGACY) && min_vecs == 1 && dev->irq)
1581 static inline void pci_free_irq_vectors(struct pci_dev *dev)
1585 static inline int pci_irq_vector(struct pci_dev *dev, unsigned int nr)
1587 if (WARN_ON_ONCE(nr > 0))
1591 static inline const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev,
1594 return cpu_possible_mask;
1599 * pci_irqd_intx_xlate() - Translate PCI INTx value to an IRQ domain hwirq
1600 * @d: the INTx IRQ domain
1601 * @node: the DT node for the device whose interrupt we're translating
1602 * @intspec: the interrupt specifier data from the DT
1603 * @intsize: the number of entries in @intspec
1604 * @out_hwirq: pointer at which to write the hwirq number
1605 * @out_type: pointer at which to write the interrupt type
1607 * Translate a PCI INTx interrupt number from device tree in the range 1-4, as
1608 * stored in the standard PCI_INTERRUPT_PIN register, to a value in the range
1609 * 0-3 suitable for use in a 4 entry IRQ domain. That is, subtract one from the
1610 * INTx value to obtain the hwirq number.
1612 * Returns 0 on success, or -EINVAL if the interrupt specifier is out of range.
1614 static inline int pci_irqd_intx_xlate(struct irq_domain *d,
1615 struct device_node *node,
1617 unsigned int intsize,
1618 unsigned long *out_hwirq,
1619 unsigned int *out_type)
1621 const u32 intx = intspec[0];
1623 if (intx < PCI_INTERRUPT_INTA || intx > PCI_INTERRUPT_INTD)
1626 *out_hwirq = intx - PCI_INTERRUPT_INTA;
1630 #ifdef CONFIG_PCIEPORTBUS
1631 extern bool pcie_ports_disabled;
1632 extern bool pcie_ports_native;
1634 #define pcie_ports_disabled true
1635 #define pcie_ports_native false
1638 #define PCIE_LINK_STATE_L0S BIT(0)
1639 #define PCIE_LINK_STATE_L1 BIT(1)
1640 #define PCIE_LINK_STATE_CLKPM BIT(2)
1641 #define PCIE_LINK_STATE_L1_1 BIT(3)
1642 #define PCIE_LINK_STATE_L1_2 BIT(4)
1643 #define PCIE_LINK_STATE_L1_1_PCIPM BIT(5)
1644 #define PCIE_LINK_STATE_L1_2_PCIPM BIT(6)
1646 #ifdef CONFIG_PCIEASPM
1647 int pci_disable_link_state(struct pci_dev *pdev, int state);
1648 int pci_disable_link_state_locked(struct pci_dev *pdev, int state);
1649 void pcie_no_aspm(void);
1650 bool pcie_aspm_support_enabled(void);
1651 bool pcie_aspm_enabled(struct pci_dev *pdev);
1653 static inline int pci_disable_link_state(struct pci_dev *pdev, int state)
1655 static inline int pci_disable_link_state_locked(struct pci_dev *pdev, int state)
1657 static inline void pcie_no_aspm(void) { }
1658 static inline bool pcie_aspm_support_enabled(void) { return false; }
1659 static inline bool pcie_aspm_enabled(struct pci_dev *pdev) { return false; }
1662 #ifdef CONFIG_PCIEAER
1663 bool pci_aer_available(void);
1665 static inline bool pci_aer_available(void) { return false; }
1668 bool pci_ats_disabled(void);
1670 #ifdef CONFIG_PCIE_PTM
1671 int pci_enable_ptm(struct pci_dev *dev, u8 *granularity);
1672 bool pcie_ptm_enabled(struct pci_dev *dev);
1674 static inline int pci_enable_ptm(struct pci_dev *dev, u8 *granularity)
1676 static inline bool pcie_ptm_enabled(struct pci_dev *dev)
1680 void pci_cfg_access_lock(struct pci_dev *dev);
1681 bool pci_cfg_access_trylock(struct pci_dev *dev);
1682 void pci_cfg_access_unlock(struct pci_dev *dev);
1684 void pci_dev_lock(struct pci_dev *dev);
1685 int pci_dev_trylock(struct pci_dev *dev);
1686 void pci_dev_unlock(struct pci_dev *dev);
1689 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
1690 * a PCI domain is defined to be a set of PCI buses which share
1691 * configuration space.
1693 #ifdef CONFIG_PCI_DOMAINS
1694 extern int pci_domains_supported;
1696 enum { pci_domains_supported = 0 };
1697 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1698 static inline int pci_proc_domain(struct pci_bus *bus) { return 0; }
1699 #endif /* CONFIG_PCI_DOMAINS */
1702 * Generic implementation for PCI domain support. If your
1703 * architecture does not need custom management of PCI
1704 * domains then this implementation will be used
1706 #ifdef CONFIG_PCI_DOMAINS_GENERIC
1707 static inline int pci_domain_nr(struct pci_bus *bus)
1709 return bus->domain_nr;
1712 int acpi_pci_bus_find_domain_nr(struct pci_bus *bus);
1714 static inline int acpi_pci_bus_find_domain_nr(struct pci_bus *bus)
1717 int pci_bus_find_domain_nr(struct pci_bus *bus, struct device *parent);
1720 /* Some architectures require additional setup to direct VGA traffic */
1721 typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
1722 unsigned int command_bits, u32 flags);
1723 void pci_register_set_vga_state(arch_set_vga_state_t func);
1726 pci_request_io_regions(struct pci_dev *pdev, const char *name)
1728 return pci_request_selected_regions(pdev,
1729 pci_select_bars(pdev, IORESOURCE_IO), name);
1733 pci_release_io_regions(struct pci_dev *pdev)
1735 return pci_release_selected_regions(pdev,
1736 pci_select_bars(pdev, IORESOURCE_IO));
1740 pci_request_mem_regions(struct pci_dev *pdev, const char *name)
1742 return pci_request_selected_regions(pdev,
1743 pci_select_bars(pdev, IORESOURCE_MEM), name);
1747 pci_release_mem_regions(struct pci_dev *pdev)
1749 return pci_release_selected_regions(pdev,
1750 pci_select_bars(pdev, IORESOURCE_MEM));
1753 #else /* CONFIG_PCI is not enabled */
1755 static inline void pci_set_flags(int flags) { }
1756 static inline void pci_add_flags(int flags) { }
1757 static inline void pci_clear_flags(int flags) { }
1758 static inline int pci_has_flag(int flag) { return 0; }
1761 * If the system does not have PCI, clearly these return errors. Define
1762 * these as simple inline functions to avoid hair in drivers.
1764 #define _PCI_NOP(o, s, t) \
1765 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
1767 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
1769 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
1770 _PCI_NOP(o, word, u16 x) \
1771 _PCI_NOP(o, dword, u32 x)
1772 _PCI_NOP_ALL(read, *)
1773 _PCI_NOP_ALL(write,)
1775 static inline struct pci_dev *pci_get_device(unsigned int vendor,
1776 unsigned int device,
1777 struct pci_dev *from)
1780 static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
1781 unsigned int device,
1782 unsigned int ss_vendor,
1783 unsigned int ss_device,
1784 struct pci_dev *from)
1787 static inline struct pci_dev *pci_get_class(unsigned int class,
1788 struct pci_dev *from)
1792 static inline int pci_dev_present(const struct pci_device_id *ids)
1795 #define no_pci_devices() (1)
1796 #define pci_dev_put(dev) do { } while (0)
1798 static inline void pci_set_master(struct pci_dev *dev) { }
1799 static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
1800 static inline void pci_disable_device(struct pci_dev *dev) { }
1801 static inline int pcim_enable_device(struct pci_dev *pdev) { return -EIO; }
1802 static inline int pci_assign_resource(struct pci_dev *dev, int i)
1804 static inline int __must_check __pci_register_driver(struct pci_driver *drv,
1805 struct module *owner,
1806 const char *mod_name)
1808 static inline int pci_register_driver(struct pci_driver *drv)
1810 static inline void pci_unregister_driver(struct pci_driver *drv) { }
1811 static inline u8 pci_find_capability(struct pci_dev *dev, int cap)
1813 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
1816 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
1819 static inline u64 pci_get_dsn(struct pci_dev *dev)
1822 /* Power management related routines */
1823 static inline int pci_save_state(struct pci_dev *dev) { return 0; }
1824 static inline void pci_restore_state(struct pci_dev *dev) { }
1825 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
1827 static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable)
1829 static inline pci_power_t pci_choose_state(struct pci_dev *dev,
1832 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1836 static inline struct resource *pci_find_resource(struct pci_dev *dev,
1837 struct resource *res)
1839 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
1841 static inline void pci_release_regions(struct pci_dev *dev) { }
1843 static inline int pci_register_io_range(struct fwnode_handle *fwnode,
1844 phys_addr_t addr, resource_size_t size)
1847 static inline unsigned long pci_address_to_pio(phys_addr_t addr) { return -1; }
1849 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
1851 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
1854 static inline struct pci_dev *pci_get_domain_bus_and_slot(int domain,
1855 unsigned int bus, unsigned int devfn)
1858 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1859 static inline struct pci_dev *pci_dev_get(struct pci_dev *dev) { return NULL; }
1861 #define dev_is_pci(d) (false)
1862 #define dev_is_pf(d) (false)
1863 static inline bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags)
1865 static inline int pci_irqd_intx_xlate(struct irq_domain *d,
1866 struct device_node *node,
1868 unsigned int intsize,
1869 unsigned long *out_hwirq,
1870 unsigned int *out_type)
1873 static inline const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
1874 struct pci_dev *dev)
1876 static inline bool pci_ats_disabled(void) { return true; }
1878 static inline int pci_irq_vector(struct pci_dev *dev, unsigned int nr)
1884 pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1885 unsigned int max_vecs, unsigned int flags,
1886 struct irq_affinity *aff_desc)
1890 #endif /* CONFIG_PCI */
1893 pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs,
1894 unsigned int max_vecs, unsigned int flags)
1896 return pci_alloc_irq_vectors_affinity(dev, min_vecs, max_vecs, flags,
1900 /* Include architecture-dependent settings and functions */
1902 #include <asm/pci.h>
1904 /* These two functions provide almost identical functionality. Depending
1905 * on the architecture, one will be implemented as a wrapper around the
1906 * other (in drivers/pci/mmap.c).
1908 * pci_mmap_resource_range() maps a specific BAR, and vm->vm_pgoff
1909 * is expected to be an offset within that region.
1911 * pci_mmap_page_range() is the legacy architecture-specific interface,
1912 * which accepts a "user visible" resource address converted by
1913 * pci_resource_to_user(), as used in the legacy mmap() interface in
1916 int pci_mmap_resource_range(struct pci_dev *dev, int bar,
1917 struct vm_area_struct *vma,
1918 enum pci_mmap_state mmap_state, int write_combine);
1919 int pci_mmap_page_range(struct pci_dev *pdev, int bar,
1920 struct vm_area_struct *vma,
1921 enum pci_mmap_state mmap_state, int write_combine);
1923 #ifndef arch_can_pci_mmap_wc
1924 #define arch_can_pci_mmap_wc() 0
1927 #ifndef arch_can_pci_mmap_io
1928 #define arch_can_pci_mmap_io() 0
1929 #define pci_iobar_pfn(pdev, bar, vma) (-EINVAL)
1931 int pci_iobar_pfn(struct pci_dev *pdev, int bar, struct vm_area_struct *vma);
1934 #ifndef pci_root_bus_fwnode
1935 #define pci_root_bus_fwnode(bus) NULL
1939 * These helpers provide future and backwards compatibility
1940 * for accessing popular PCI BAR info
1942 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
1943 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
1944 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
1945 #define pci_resource_len(dev,bar) \
1946 ((pci_resource_end((dev), (bar)) == 0) ? 0 : \
1948 (pci_resource_end((dev), (bar)) - \
1949 pci_resource_start((dev), (bar)) + 1))
1952 * Similar to the helpers above, these manipulate per-pci_dev
1953 * driver-specific data. They are really just a wrapper around
1954 * the generic device structure functions of these calls.
1956 static inline void *pci_get_drvdata(struct pci_dev *pdev)
1958 return dev_get_drvdata(&pdev->dev);
1961 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
1963 dev_set_drvdata(&pdev->dev, data);
1966 static inline const char *pci_name(const struct pci_dev *pdev)
1968 return dev_name(&pdev->dev);
1971 void pci_resource_to_user(const struct pci_dev *dev, int bar,
1972 const struct resource *rsrc,
1973 resource_size_t *start, resource_size_t *end);
1976 * The world is not perfect and supplies us with broken PCI devices.
1977 * For at least a part of these bugs we need a work-around, so both
1978 * generic (drivers/pci/quirks.c) and per-architecture code can define
1979 * fixup hooks to be called for particular buggy devices.
1983 u16 vendor; /* Or PCI_ANY_ID */
1984 u16 device; /* Or PCI_ANY_ID */
1985 u32 class; /* Or PCI_ANY_ID */
1986 unsigned int class_shift; /* should be 0, 8, 16 */
1987 #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
1990 void (*hook)(struct pci_dev *dev);
1994 enum pci_fixup_pass {
1995 pci_fixup_early, /* Before probing BARs */
1996 pci_fixup_header, /* After reading configuration header */
1997 pci_fixup_final, /* Final phase of device fixups */
1998 pci_fixup_enable, /* pci_enable_device() time */
1999 pci_fixup_resume, /* pci_device_resume() */
2000 pci_fixup_suspend, /* pci_device_suspend() */
2001 pci_fixup_resume_early, /* pci_device_resume_early() */
2002 pci_fixup_suspend_late, /* pci_device_suspend_late() */
2005 #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
2006 #define ___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
2007 class_shift, hook) \
2008 __ADDRESSABLE(hook) \
2009 asm(".section " #sec ", \"a\" \n" \
2011 ".short " #vendor ", " #device " \n" \
2012 ".long " #class ", " #class_shift " \n" \
2013 ".long " #hook " - . \n" \
2017 * Clang's LTO may rename static functions in C, but has no way to
2018 * handle such renamings when referenced from inline asm. To work
2019 * around this, create global C stubs for these cases.
2021 #ifdef CONFIG_LTO_CLANG
2022 #define __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
2023 class_shift, hook, stub) \
2024 void __cficanonical stub(struct pci_dev *dev); \
2025 void __cficanonical stub(struct pci_dev *dev) \
2029 ___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
2032 #define __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
2033 class_shift, hook, stub) \
2034 ___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
2038 #define DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
2039 class_shift, hook) \
2040 __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
2041 class_shift, hook, __UNIQUE_ID(hook))
2043 /* Anonymous variables would be nice... */
2044 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \
2045 class_shift, hook) \
2046 static const struct pci_fixup __PASTE(__pci_fixup_##name,__LINE__) __used \
2047 __attribute__((__section__(#section), aligned((sizeof(void *))))) \
2048 = { vendor, device, class, class_shift, hook };
2051 #define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class, \
2052 class_shift, hook) \
2053 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
2054 hook, vendor, device, class, class_shift, hook)
2055 #define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class, \
2056 class_shift, hook) \
2057 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
2058 hook, vendor, device, class, class_shift, hook)
2059 #define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class, \
2060 class_shift, hook) \
2061 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
2062 hook, vendor, device, class, class_shift, hook)
2063 #define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class, \
2064 class_shift, hook) \
2065 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
2066 hook, vendor, device, class, class_shift, hook)
2067 #define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class, \
2068 class_shift, hook) \
2069 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
2070 resume##hook, vendor, device, class, class_shift, hook)
2071 #define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class, \
2072 class_shift, hook) \
2073 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
2074 resume_early##hook, vendor, device, class, class_shift, hook)
2075 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class, \
2076 class_shift, hook) \
2077 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
2078 suspend##hook, vendor, device, class, class_shift, hook)
2079 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND_LATE(vendor, device, class, \
2080 class_shift, hook) \
2081 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
2082 suspend_late##hook, vendor, device, class, class_shift, hook)
2084 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
2085 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
2086 hook, vendor, device, PCI_ANY_ID, 0, hook)
2087 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
2088 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
2089 hook, vendor, device, PCI_ANY_ID, 0, hook)
2090 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
2091 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
2092 hook, vendor, device, PCI_ANY_ID, 0, hook)
2093 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
2094 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
2095 hook, vendor, device, PCI_ANY_ID, 0, hook)
2096 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
2097 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
2098 resume##hook, vendor, device, PCI_ANY_ID, 0, hook)
2099 #define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
2100 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
2101 resume_early##hook, vendor, device, PCI_ANY_ID, 0, hook)
2102 #define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
2103 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
2104 suspend##hook, vendor, device, PCI_ANY_ID, 0, hook)
2105 #define DECLARE_PCI_FIXUP_SUSPEND_LATE(vendor, device, hook) \
2106 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
2107 suspend_late##hook, vendor, device, PCI_ANY_ID, 0, hook)
2109 #ifdef CONFIG_PCI_QUIRKS
2110 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
2112 static inline void pci_fixup_device(enum pci_fixup_pass pass,
2113 struct pci_dev *dev) { }
2116 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
2117 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
2118 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
2119 int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name);
2120 int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
2122 void pcim_iounmap_regions(struct pci_dev *pdev, int mask);
2124 extern int pci_pci_problems;
2125 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
2126 #define PCIPCI_TRITON 2
2127 #define PCIPCI_NATOMA 4
2128 #define PCIPCI_VIAETBF 8
2129 #define PCIPCI_VSFX 16
2130 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
2131 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
2133 extern unsigned long pci_cardbus_io_size;
2134 extern unsigned long pci_cardbus_mem_size;
2135 extern u8 pci_dfl_cache_line_size;
2136 extern u8 pci_cache_line_size;
2138 /* Architecture-specific versions may override these (weak) */
2139 void pcibios_disable_device(struct pci_dev *dev);
2140 void pcibios_set_master(struct pci_dev *dev);
2141 int pcibios_set_pcie_reset_state(struct pci_dev *dev,
2142 enum pcie_reset_state state);
2143 int pcibios_device_add(struct pci_dev *dev);
2144 void pcibios_release_device(struct pci_dev *dev);
2146 void pcibios_penalize_isa_irq(int irq, int active);
2148 static inline void pcibios_penalize_isa_irq(int irq, int active) {}
2150 int pcibios_alloc_irq(struct pci_dev *dev);
2151 void pcibios_free_irq(struct pci_dev *dev);
2152 resource_size_t pcibios_default_alignment(void);
2154 #if defined(CONFIG_PCI_MMCONFIG) || defined(CONFIG_ACPI_MCFG)
2155 void __init pci_mmcfg_early_init(void);
2156 void __init pci_mmcfg_late_init(void);
2158 static inline void pci_mmcfg_early_init(void) { }
2159 static inline void pci_mmcfg_late_init(void) { }
2162 int pci_ext_cfg_avail(void);
2164 void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
2165 void __iomem *pci_ioremap_wc_bar(struct pci_dev *pdev, int bar);
2167 #ifdef CONFIG_PCI_IOV
2168 int pci_iov_virtfn_bus(struct pci_dev *dev, int id);
2169 int pci_iov_virtfn_devfn(struct pci_dev *dev, int id);
2170 int pci_iov_vf_id(struct pci_dev *dev);
2171 void *pci_iov_get_pf_drvdata(struct pci_dev *dev, struct pci_driver *pf_driver);
2172 int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
2173 void pci_disable_sriov(struct pci_dev *dev);
2175 int pci_iov_sysfs_link(struct pci_dev *dev, struct pci_dev *virtfn, int id);
2176 int pci_iov_add_virtfn(struct pci_dev *dev, int id);
2177 void pci_iov_remove_virtfn(struct pci_dev *dev, int id);
2178 int pci_num_vf(struct pci_dev *dev);
2179 int pci_vfs_assigned(struct pci_dev *dev);
2180 int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs);
2181 int pci_sriov_get_totalvfs(struct pci_dev *dev);
2182 int pci_sriov_configure_simple(struct pci_dev *dev, int nr_virtfn);
2183 resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno);
2184 void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe);
2186 /* Arch may override these (weak) */
2187 int pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs);
2188 int pcibios_sriov_disable(struct pci_dev *pdev);
2189 resource_size_t pcibios_iov_resource_alignment(struct pci_dev *dev, int resno);
2191 static inline int pci_iov_virtfn_bus(struct pci_dev *dev, int id)
2195 static inline int pci_iov_virtfn_devfn(struct pci_dev *dev, int id)
2200 static inline int pci_iov_vf_id(struct pci_dev *dev)
2205 static inline void *pci_iov_get_pf_drvdata(struct pci_dev *dev,
2206 struct pci_driver *pf_driver)
2208 return ERR_PTR(-EINVAL);
2211 static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
2214 static inline int pci_iov_sysfs_link(struct pci_dev *dev,
2215 struct pci_dev *virtfn, int id)
2219 static inline int pci_iov_add_virtfn(struct pci_dev *dev, int id)
2223 static inline void pci_iov_remove_virtfn(struct pci_dev *dev,
2225 static inline void pci_disable_sriov(struct pci_dev *dev) { }
2226 static inline int pci_num_vf(struct pci_dev *dev) { return 0; }
2227 static inline int pci_vfs_assigned(struct pci_dev *dev)
2229 static inline int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs)
2231 static inline int pci_sriov_get_totalvfs(struct pci_dev *dev)
2233 #define pci_sriov_configure_simple NULL
2234 static inline resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno)
2236 static inline void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe) { }
2239 #if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
2240 void pci_hp_create_module_link(struct pci_slot *pci_slot);
2241 void pci_hp_remove_module_link(struct pci_slot *pci_slot);
2245 * pci_pcie_cap - get the saved PCIe capability offset
2248 * PCIe capability offset is calculated at PCI device initialization
2249 * time and saved in the data structure. This function returns saved
2250 * PCIe capability offset. Using this instead of pci_find_capability()
2251 * reduces unnecessary search in the PCI configuration space. If you
2252 * need to calculate PCIe capability offset from raw device for some
2253 * reasons, please use pci_find_capability() instead.
2255 static inline int pci_pcie_cap(struct pci_dev *dev)
2257 return dev->pcie_cap;
2261 * pci_is_pcie - check if the PCI device is PCI Express capable
2264 * Returns: true if the PCI device is PCI Express capable, false otherwise.
2266 static inline bool pci_is_pcie(struct pci_dev *dev)
2268 return pci_pcie_cap(dev);
2272 * pcie_caps_reg - get the PCIe Capabilities Register
2275 static inline u16 pcie_caps_reg(const struct pci_dev *dev)
2277 return dev->pcie_flags_reg;
2281 * pci_pcie_type - get the PCIe device/port type
2284 static inline int pci_pcie_type(const struct pci_dev *dev)
2286 return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4;
2290 * pcie_find_root_port - Get the PCIe root port device
2293 * Traverse up the parent chain and return the PCIe Root Port PCI Device
2294 * for a given PCI/PCIe Device.
2296 static inline struct pci_dev *pcie_find_root_port(struct pci_dev *dev)
2299 if (pci_is_pcie(dev) &&
2300 pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT)
2302 dev = pci_upstream_bridge(dev);
2308 void pci_request_acs(void);
2309 bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags);
2310 bool pci_acs_path_enabled(struct pci_dev *start,
2311 struct pci_dev *end, u16 acs_flags);
2312 int pci_enable_atomic_ops_to_root(struct pci_dev *dev, u32 cap_mask);
2314 #define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */
2315 #define PCI_VPD_LRDT_ID(x) ((x) | PCI_VPD_LRDT)
2317 /* Large Resource Data Type Tag Item Names */
2318 #define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */
2319 #define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */
2320 #define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */
2322 #define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING)
2323 #define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA)
2324 #define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA)
2326 #define PCI_VPD_RO_KEYWORD_PARTNO "PN"
2327 #define PCI_VPD_RO_KEYWORD_SERIALNO "SN"
2328 #define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
2329 #define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
2330 #define PCI_VPD_RO_KEYWORD_CHKSUM "RV"
2333 * pci_vpd_alloc - Allocate buffer and read VPD into it
2335 * @size: pointer to field where VPD length is returned
2337 * Returns pointer to allocated buffer or an ERR_PTR in case of failure
2339 void *pci_vpd_alloc(struct pci_dev *dev, unsigned int *size);
2342 * pci_vpd_find_id_string - Locate id string in VPD
2343 * @buf: Pointer to buffered VPD data
2344 * @len: The length of the buffer area in which to search
2345 * @size: Pointer to field where length of id string is returned
2347 * Returns the index of the id string or -ENOENT if not found.
2349 int pci_vpd_find_id_string(const u8 *buf, unsigned int len, unsigned int *size);
2352 * pci_vpd_find_ro_info_keyword - Locate info field keyword in VPD RO section
2353 * @buf: Pointer to buffered VPD data
2354 * @len: The length of the buffer area in which to search
2355 * @kw: The keyword to search for
2356 * @size: Pointer to field where length of found keyword data is returned
2358 * Returns the index of the information field keyword data or -ENOENT if
2361 int pci_vpd_find_ro_info_keyword(const void *buf, unsigned int len,
2362 const char *kw, unsigned int *size);
2365 * pci_vpd_check_csum - Check VPD checksum
2366 * @buf: Pointer to buffered VPD data
2369 * Returns 1 if VPD has no checksum, otherwise 0 or an errno
2371 int pci_vpd_check_csum(const void *buf, unsigned int len);
2373 /* PCI <-> OF binding helpers */
2377 struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus);
2378 bool pci_host_of_has_msi_map(struct device *dev);
2380 /* Arch may override this (weak) */
2381 struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus);
2383 #else /* CONFIG_OF */
2384 static inline struct irq_domain *
2385 pci_host_bridge_of_msi_domain(struct pci_bus *bus) { return NULL; }
2386 static inline bool pci_host_of_has_msi_map(struct device *dev) { return false; }
2387 #endif /* CONFIG_OF */
2389 static inline struct device_node *
2390 pci_device_to_OF_node(const struct pci_dev *pdev)
2392 return pdev ? pdev->dev.of_node : NULL;
2395 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
2397 return bus ? bus->dev.of_node : NULL;
2401 struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus);
2404 pci_msi_register_fwnode_provider(struct fwnode_handle *(*fn)(struct device *));
2405 bool pci_pr3_present(struct pci_dev *pdev);
2407 static inline struct irq_domain *
2408 pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) { return NULL; }
2409 static inline bool pci_pr3_present(struct pci_dev *pdev) { return false; }
2413 static inline struct eeh_dev *pci_dev_to_eeh_dev(struct pci_dev *pdev)
2415 return pdev->dev.archdata.edev;
2419 void pci_add_dma_alias(struct pci_dev *dev, u8 devfn_from, unsigned nr_devfns);
2420 bool pci_devs_are_dma_aliases(struct pci_dev *dev1, struct pci_dev *dev2);
2421 int pci_for_each_dma_alias(struct pci_dev *pdev,
2422 int (*fn)(struct pci_dev *pdev,
2423 u16 alias, void *data), void *data);
2425 /* Helper functions for operation of device flag */
2426 static inline void pci_set_dev_assigned(struct pci_dev *pdev)
2428 pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED;
2430 static inline void pci_clear_dev_assigned(struct pci_dev *pdev)
2432 pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
2434 static inline bool pci_is_dev_assigned(struct pci_dev *pdev)
2436 return (pdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED) == PCI_DEV_FLAGS_ASSIGNED;
2440 * pci_ari_enabled - query ARI forwarding status
2443 * Returns true if ARI forwarding is enabled.
2445 static inline bool pci_ari_enabled(struct pci_bus *bus)
2447 return bus->self && bus->self->ari_enabled;
2451 * pci_is_thunderbolt_attached - whether device is on a Thunderbolt daisy chain
2452 * @pdev: PCI device to check
2454 * Walk upwards from @pdev and check for each encountered bridge if it's part
2455 * of a Thunderbolt controller. Reaching the host bridge means @pdev is not
2456 * Thunderbolt-attached. (But rather soldered to the mainboard usually.)
2458 static inline bool pci_is_thunderbolt_attached(struct pci_dev *pdev)
2460 struct pci_dev *parent = pdev;
2462 if (pdev->is_thunderbolt)
2465 while ((parent = pci_upstream_bridge(parent)))
2466 if (parent->is_thunderbolt)
2472 #if defined(CONFIG_PCIEPORTBUS) || defined(CONFIG_EEH)
2473 void pci_uevent_ers(struct pci_dev *pdev, enum pci_ers_result err_type);
2476 /* Provide the legacy pci_dma_* API */
2477 #include <linux/pci-dma-compat.h>
2479 #define pci_printk(level, pdev, fmt, arg...) \
2480 dev_printk(level, &(pdev)->dev, fmt, ##arg)
2482 #define pci_emerg(pdev, fmt, arg...) dev_emerg(&(pdev)->dev, fmt, ##arg)
2483 #define pci_alert(pdev, fmt, arg...) dev_alert(&(pdev)->dev, fmt, ##arg)
2484 #define pci_crit(pdev, fmt, arg...) dev_crit(&(pdev)->dev, fmt, ##arg)
2485 #define pci_err(pdev, fmt, arg...) dev_err(&(pdev)->dev, fmt, ##arg)
2486 #define pci_warn(pdev, fmt, arg...) dev_warn(&(pdev)->dev, fmt, ##arg)
2487 #define pci_notice(pdev, fmt, arg...) dev_notice(&(pdev)->dev, fmt, ##arg)
2488 #define pci_info(pdev, fmt, arg...) dev_info(&(pdev)->dev, fmt, ##arg)
2489 #define pci_dbg(pdev, fmt, arg...) dev_dbg(&(pdev)->dev, fmt, ##arg)
2491 #define pci_notice_ratelimited(pdev, fmt, arg...) \
2492 dev_notice_ratelimited(&(pdev)->dev, fmt, ##arg)
2494 #define pci_info_ratelimited(pdev, fmt, arg...) \
2495 dev_info_ratelimited(&(pdev)->dev, fmt, ##arg)
2497 #define pci_WARN(pdev, condition, fmt, arg...) \
2498 WARN(condition, "%s %s: " fmt, \
2499 dev_driver_string(&(pdev)->dev), pci_name(pdev), ##arg)
2501 #define pci_WARN_ONCE(pdev, condition, fmt, arg...) \
2502 WARN_ONCE(condition, "%s %s: " fmt, \
2503 dev_driver_string(&(pdev)->dev), pci_name(pdev), ##arg)
2505 #endif /* LINUX_PCI_H */