1 /* SPDX-License-Identifier: GPL-2.0 */
5 * PCI defines and function prototypes
6 * Copyright 1994, Drew Eckhardt
7 * Copyright 1997--1999 Martin Mares <mj@ucw.cz>
9 * PCI Express ASPM defines and function prototypes
10 * Copyright (c) 2007 Intel Corp.
11 * Zhang Yanmin (yanmin.zhang@intel.com)
12 * Shaohua Li (shaohua.li@intel.com)
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),
238 enum pci_irq_reroute_variant {
239 INTEL_IRQ_REROUTE_VARIANT = 1,
240 MAX_IRQ_REROUTE_VARIANTS = 3
243 typedef unsigned short __bitwise pci_bus_flags_t;
245 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
246 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
247 PCI_BUS_FLAGS_NO_AERSID = (__force pci_bus_flags_t) 4,
248 PCI_BUS_FLAGS_NO_EXTCFG = (__force pci_bus_flags_t) 8,
251 /* Values from Link Status register, PCIe r3.1, sec 7.8.8 */
252 enum pcie_link_width {
253 PCIE_LNK_WIDTH_RESRV = 0x00,
261 PCIE_LNK_WIDTH_UNKNOWN = 0xff,
264 /* See matching string table in pci_speed_string() */
266 PCI_SPEED_33MHz = 0x00,
267 PCI_SPEED_66MHz = 0x01,
268 PCI_SPEED_66MHz_PCIX = 0x02,
269 PCI_SPEED_100MHz_PCIX = 0x03,
270 PCI_SPEED_133MHz_PCIX = 0x04,
271 PCI_SPEED_66MHz_PCIX_ECC = 0x05,
272 PCI_SPEED_100MHz_PCIX_ECC = 0x06,
273 PCI_SPEED_133MHz_PCIX_ECC = 0x07,
274 PCI_SPEED_66MHz_PCIX_266 = 0x09,
275 PCI_SPEED_100MHz_PCIX_266 = 0x0a,
276 PCI_SPEED_133MHz_PCIX_266 = 0x0b,
282 PCI_SPEED_66MHz_PCIX_533 = 0x11,
283 PCI_SPEED_100MHz_PCIX_533 = 0x12,
284 PCI_SPEED_133MHz_PCIX_533 = 0x13,
285 PCIE_SPEED_2_5GT = 0x14,
286 PCIE_SPEED_5_0GT = 0x15,
287 PCIE_SPEED_8_0GT = 0x16,
288 PCIE_SPEED_16_0GT = 0x17,
289 PCIE_SPEED_32_0GT = 0x18,
290 PCIE_SPEED_64_0GT = 0x19,
291 PCI_SPEED_UNKNOWN = 0xff,
294 enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev);
295 enum pcie_link_width pcie_get_width_cap(struct pci_dev *dev);
304 struct pcie_link_state;
309 /* The pci_dev structure describes PCI devices */
311 struct list_head bus_list; /* Node in per-bus list */
312 struct pci_bus *bus; /* Bus this device is on */
313 struct pci_bus *subordinate; /* Bus this device bridges to */
315 void *sysdata; /* Hook for sys-specific extension */
316 struct proc_dir_entry *procent; /* Device entry in /proc/bus/pci */
317 struct pci_slot *slot; /* Physical slot this device is in */
319 unsigned int devfn; /* Encoded device & function index */
320 unsigned short vendor;
321 unsigned short device;
322 unsigned short subsystem_vendor;
323 unsigned short subsystem_device;
324 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
325 u8 revision; /* PCI revision, low byte of class word */
326 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
327 #ifdef CONFIG_PCIEAER
328 u16 aer_cap; /* AER capability offset */
329 struct aer_stats *aer_stats; /* AER stats for this device */
331 #ifdef CONFIG_PCIEPORTBUS
332 struct rcec_ea *rcec_ea; /* RCEC cached endpoint association */
333 struct pci_dev *rcec; /* Associated RCEC device */
335 u32 devcap; /* PCIe Device Capabilities */
336 u8 pcie_cap; /* PCIe capability offset */
337 u8 msi_cap; /* MSI capability offset */
338 u8 msix_cap; /* MSI-X capability offset */
339 u8 pcie_mpss:3; /* PCIe Max Payload Size Supported */
340 u8 rom_base_reg; /* Config register controlling ROM */
341 u8 pin; /* Interrupt pin this device uses */
342 u16 pcie_flags_reg; /* Cached PCIe Capabilities Register */
343 unsigned long *dma_alias_mask;/* Mask of enabled devfn aliases */
345 struct pci_driver *driver; /* Driver bound to this device */
346 u64 dma_mask; /* Mask of the bits of bus address this
347 device implements. Normally this is
348 0xffffffff. You only need to change
349 this if your device has broken DMA
350 or supports 64-bit transfers. */
352 struct device_dma_parameters dma_parms;
354 pci_power_t current_state; /* Current operating state. In ACPI,
355 this is D0-D3, D0 being fully
356 functional, and D3 being off. */
357 unsigned int imm_ready:1; /* Supports Immediate Readiness */
358 u8 pm_cap; /* PM capability offset */
359 unsigned int pme_support:5; /* Bitmask of states from which PME#
361 unsigned int pme_poll:1; /* Poll device's PME status bit */
362 unsigned int d1_support:1; /* Low power state D1 is supported */
363 unsigned int d2_support:1; /* Low power state D2 is supported */
364 unsigned int no_d1d2:1; /* D1 and D2 are forbidden */
365 unsigned int no_d3cold:1; /* D3cold is forbidden */
366 unsigned int bridge_d3:1; /* Allow D3 for bridge */
367 unsigned int d3cold_allowed:1; /* D3cold is allowed by user */
368 unsigned int mmio_always_on:1; /* Disallow turning off io/mem
369 decoding during BAR sizing */
370 unsigned int wakeup_prepared:1;
371 unsigned int runtime_d3cold:1; /* Whether go through runtime
372 D3cold, not set for devices
373 powered on/off by the
374 corresponding bridge */
375 unsigned int skip_bus_pm:1; /* Internal: Skip bus-level PM */
376 unsigned int ignore_hotplug:1; /* Ignore hotplug events */
377 unsigned int hotplug_user_indicators:1; /* SlotCtl indicators
378 controlled exclusively by
380 unsigned int clear_retrain_link:1; /* Need to clear Retrain Link
382 unsigned int d3hot_delay; /* D3hot->D0 transition time in ms */
383 unsigned int d3cold_delay; /* D3cold->D0 transition time in ms */
385 #ifdef CONFIG_PCIEASPM
386 struct pcie_link_state *link_state; /* ASPM link state */
387 unsigned int ltr_path:1; /* Latency Tolerance Reporting
388 supported from root to here */
389 u16 l1ss; /* L1SS Capability pointer */
391 unsigned int pasid_no_tlp:1; /* PASID works without TLP Prefix */
392 unsigned int eetlp_prefix_path:1; /* End-to-End TLP Prefix */
394 pci_channel_state_t error_state; /* Current connectivity state */
395 struct device dev; /* Generic device interface */
397 int cfg_size; /* Size of config space */
400 * Instead of touching interrupt line and base address registers
401 * directly, use the values stored here. They might be different!
404 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
406 bool match_driver; /* Skip attaching driver */
408 unsigned int transparent:1; /* Subtractive decode bridge */
409 unsigned int io_window:1; /* Bridge has I/O window */
410 unsigned int pref_window:1; /* Bridge has pref mem window */
411 unsigned int pref_64_window:1; /* Pref mem window is 64-bit */
412 unsigned int multifunction:1; /* Multi-function device */
414 unsigned int is_busmaster:1; /* Is busmaster */
415 unsigned int no_msi:1; /* May not use MSI */
416 unsigned int no_64bit_msi:1; /* May only use 32-bit MSIs */
417 unsigned int block_cfg_access:1; /* Config space access blocked */
418 unsigned int broken_parity_status:1; /* Generates false positive parity */
419 unsigned int irq_reroute_variant:2; /* Needs IRQ rerouting variant */
420 unsigned int msi_enabled:1;
421 unsigned int msix_enabled:1;
422 unsigned int ari_enabled:1; /* ARI forwarding */
423 unsigned int ats_enabled:1; /* Address Translation Svc */
424 unsigned int pasid_enabled:1; /* Process Address Space ID */
425 unsigned int pri_enabled:1; /* Page Request Interface */
426 unsigned int is_managed:1;
427 unsigned int needs_freset:1; /* Requires fundamental reset */
428 unsigned int state_saved:1;
429 unsigned int is_physfn:1;
430 unsigned int is_virtfn:1;
431 unsigned int is_hotplug_bridge:1;
432 unsigned int shpc_managed:1; /* SHPC owned by shpchp */
433 unsigned int is_thunderbolt:1; /* Thunderbolt controller */
435 * Devices marked being untrusted are the ones that can potentially
436 * execute DMA attacks and similar. They are typically connected
437 * through external ports such as Thunderbolt but not limited to
438 * that. When an IOMMU is enabled they should be getting full
439 * mappings to make sure they cannot access arbitrary memory.
441 unsigned int untrusted:1;
443 * Info from the platform, e.g., ACPI or device tree, may mark a
444 * device as "external-facing". An external-facing device is
445 * itself internal but devices downstream from it are external.
447 unsigned int external_facing:1;
448 unsigned int broken_intx_masking:1; /* INTx masking can't be used */
449 unsigned int io_window_1k:1; /* Intel bridge 1K I/O windows */
450 unsigned int irq_managed:1;
451 unsigned int non_compliant_bars:1; /* Broken BARs; ignore them */
452 unsigned int is_probed:1; /* Device probing in progress */
453 unsigned int link_active_reporting:1;/* Device capable of reporting link active */
454 unsigned int no_vf_scan:1; /* Don't scan for VFs after IOV enablement */
455 unsigned int no_command_memory:1; /* No PCI_COMMAND_MEMORY */
456 pci_dev_flags_t dev_flags;
457 atomic_t enable_cnt; /* pci_enable_device has been called */
459 u32 saved_config_space[16]; /* Config space saved at suspend time */
460 struct hlist_head saved_cap_space;
461 int rom_attr_enabled; /* Display of ROM attribute enabled? */
462 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
463 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
465 #ifdef CONFIG_HOTPLUG_PCI_PCIE
466 unsigned int broken_cmd_compl:1; /* No compl for some cmds */
468 #ifdef CONFIG_PCIE_PTM
469 unsigned int ptm_root:1;
470 unsigned int ptm_enabled:1;
473 #ifdef CONFIG_PCI_MSI
474 const struct attribute_group **msi_irq_groups;
477 #ifdef CONFIG_PCIE_DPC
479 unsigned int dpc_rp_extensions:1;
482 #ifdef CONFIG_PCI_ATS
484 struct pci_sriov *sriov; /* PF: SR-IOV info */
485 struct pci_dev *physfn; /* VF: related PF */
487 u16 ats_cap; /* ATS Capability offset */
488 u8 ats_stu; /* ATS Smallest Translation Unit */
490 #ifdef CONFIG_PCI_PRI
491 u16 pri_cap; /* PRI Capability offset */
492 u32 pri_reqs_alloc; /* Number of PRI requests allocated */
493 unsigned int pasid_required:1; /* PRG Response PASID Required */
495 #ifdef CONFIG_PCI_PASID
496 u16 pasid_cap; /* PASID Capability offset */
499 #ifdef CONFIG_PCI_P2PDMA
500 struct pci_p2pdma __rcu *p2pdma;
502 u16 acs_cap; /* ACS Capability offset */
503 phys_addr_t rom; /* Physical address if not from BAR */
504 size_t romlen; /* Length if not from BAR */
505 char *driver_override; /* Driver name to force a match */
507 unsigned long priv_flags; /* Private flags for the PCI driver */
509 /* These methods index pci_reset_fn_methods[] */
510 u8 reset_methods[PCI_NUM_RESET_METHODS]; /* In priority order */
513 static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
515 #ifdef CONFIG_PCI_IOV
522 struct pci_dev *pci_alloc_dev(struct pci_bus *bus);
524 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
525 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
527 static inline int pci_channel_offline(struct pci_dev *pdev)
529 return (pdev->error_state != pci_channel_io_normal);
532 struct pci_host_bridge {
534 struct pci_bus *bus; /* Root bus */
536 struct pci_ops *child_ops;
539 struct list_head windows; /* resource_entry */
540 struct list_head dma_ranges; /* dma ranges resource list */
541 u8 (*swizzle_irq)(struct pci_dev *, u8 *); /* Platform IRQ swizzler */
542 int (*map_irq)(const struct pci_dev *, u8, u8);
543 void (*release_fn)(struct pci_host_bridge *);
545 unsigned int ignore_reset_delay:1; /* For entire hierarchy */
546 unsigned int no_ext_tags:1; /* No Extended Tags */
547 unsigned int native_aer:1; /* OS may use PCIe AER */
548 unsigned int native_pcie_hotplug:1; /* OS may use PCIe hotplug */
549 unsigned int native_shpc_hotplug:1; /* OS may use SHPC hotplug */
550 unsigned int native_pme:1; /* OS may use PCIe PME */
551 unsigned int native_ltr:1; /* OS may use PCIe LTR */
552 unsigned int native_dpc:1; /* OS may use PCIe DPC */
553 unsigned int preserve_config:1; /* Preserve FW resource setup */
554 unsigned int size_windows:1; /* Enable root bus sizing */
555 unsigned int msi_domain:1; /* Bridge wants MSI domain */
557 /* Resource alignment requirements */
558 resource_size_t (*align_resource)(struct pci_dev *dev,
559 const struct resource *res,
560 resource_size_t start,
561 resource_size_t size,
562 resource_size_t align);
563 unsigned long private[] ____cacheline_aligned;
566 #define to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev)
568 static inline void *pci_host_bridge_priv(struct pci_host_bridge *bridge)
570 return (void *)bridge->private;
573 static inline struct pci_host_bridge *pci_host_bridge_from_priv(void *priv)
575 return container_of(priv, struct pci_host_bridge, private);
578 struct pci_host_bridge *pci_alloc_host_bridge(size_t priv);
579 struct pci_host_bridge *devm_pci_alloc_host_bridge(struct device *dev,
581 void pci_free_host_bridge(struct pci_host_bridge *bridge);
582 struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus);
584 void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
585 void (*release_fn)(struct pci_host_bridge *),
588 int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge);
591 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
592 * to P2P or CardBus bridge windows) go in a table. Additional ones (for
593 * buses below host bridges or subtractive decode bridges) go in the list.
594 * Use pci_bus_for_each_resource() to iterate through all the resources.
598 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly
599 * and there's no way to program the bridge with the details of the window.
600 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive-
601 * decode bit set, because they are explicit and can be programmed with _SRS.
603 #define PCI_SUBTRACTIVE_DECODE 0x1
605 struct pci_bus_resource {
606 struct list_head list;
607 struct resource *res;
611 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
614 struct list_head node; /* Node in list of buses */
615 struct pci_bus *parent; /* Parent bus this bridge is on */
616 struct list_head children; /* List of child buses */
617 struct list_head devices; /* List of devices on this bus */
618 struct pci_dev *self; /* Bridge device as seen by parent */
619 struct list_head slots; /* List of slots on this bus;
620 protected by pci_slot_mutex */
621 struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
622 struct list_head resources; /* Address space routed to this bus */
623 struct resource busn_res; /* Bus numbers routed to this bus */
625 struct pci_ops *ops; /* Configuration access functions */
626 void *sysdata; /* Hook for sys-specific extension */
627 struct proc_dir_entry *procdir; /* Directory entry in /proc/bus/pci */
629 unsigned char number; /* Bus number */
630 unsigned char primary; /* Number of primary bridge */
631 unsigned char max_bus_speed; /* enum pci_bus_speed */
632 unsigned char cur_bus_speed; /* enum pci_bus_speed */
633 #ifdef CONFIG_PCI_DOMAINS_GENERIC
639 unsigned short bridge_ctl; /* Manage NO_ISA/FBB/et al behaviors */
640 pci_bus_flags_t bus_flags; /* Inherited by child buses */
641 struct device *bridge;
643 struct bin_attribute *legacy_io; /* Legacy I/O for this bus */
644 struct bin_attribute *legacy_mem; /* Legacy mem */
645 unsigned int is_added:1;
648 #define to_pci_bus(n) container_of(n, struct pci_bus, dev)
650 static inline u16 pci_dev_id(struct pci_dev *dev)
652 return PCI_DEVID(dev->bus->number, dev->devfn);
656 * Returns true if the PCI bus is root (behind host-PCI bridge),
659 * Some code assumes that "bus->self == NULL" means that bus is a root bus.
660 * This is incorrect because "virtual" buses added for SR-IOV (via
661 * virtfn_add_bus()) have "bus->self == NULL" but are not root buses.
663 static inline bool pci_is_root_bus(struct pci_bus *pbus)
665 return !(pbus->parent);
669 * pci_is_bridge - check if the PCI device is a bridge
672 * Return true if the PCI device is bridge whether it has subordinate
675 static inline bool pci_is_bridge(struct pci_dev *dev)
677 return dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
678 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS;
681 #define for_each_pci_bridge(dev, bus) \
682 list_for_each_entry(dev, &bus->devices, bus_list) \
683 if (!pci_is_bridge(dev)) {} else
685 static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev)
687 dev = pci_physfn(dev);
688 if (pci_is_root_bus(dev->bus))
691 return dev->bus->self;
694 #ifdef CONFIG_PCI_MSI
695 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
697 return pci_dev->msi_enabled || pci_dev->msix_enabled;
700 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
703 /* Error values that may be returned by PCI functions */
704 #define PCIBIOS_SUCCESSFUL 0x00
705 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
706 #define PCIBIOS_BAD_VENDOR_ID 0x83
707 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
708 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
709 #define PCIBIOS_SET_FAILED 0x88
710 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
712 /* Translate above to generic errno for passing back through non-PCI code */
713 static inline int pcibios_err_to_errno(int err)
715 if (err <= PCIBIOS_SUCCESSFUL)
716 return err; /* Assume already errno */
719 case PCIBIOS_FUNC_NOT_SUPPORTED:
721 case PCIBIOS_BAD_VENDOR_ID:
723 case PCIBIOS_DEVICE_NOT_FOUND:
725 case PCIBIOS_BAD_REGISTER_NUMBER:
727 case PCIBIOS_SET_FAILED:
729 case PCIBIOS_BUFFER_TOO_SMALL:
736 /* Low-level architecture-dependent routines */
739 int (*add_bus)(struct pci_bus *bus);
740 void (*remove_bus)(struct pci_bus *bus);
741 void __iomem *(*map_bus)(struct pci_bus *bus, unsigned int devfn, int where);
742 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
743 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
747 * ACPI needs to be able to access PCI config space before we've done a
748 * PCI bus scan and created pci_bus structures.
750 int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
751 int reg, int len, u32 *val);
752 int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
753 int reg, int len, u32 val);
755 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
756 typedef u64 pci_bus_addr_t;
758 typedef u32 pci_bus_addr_t;
761 struct pci_bus_region {
762 pci_bus_addr_t start;
767 spinlock_t lock; /* Protects list, index */
768 struct list_head list; /* For IDs added at runtime */
773 * PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
774 * a set of callbacks in struct pci_error_handlers, that device driver
775 * will be notified of PCI bus errors, and will be driven to recovery
776 * when an error occurs.
779 typedef unsigned int __bitwise pci_ers_result_t;
781 enum pci_ers_result {
782 /* No result/none/not supported in device driver */
783 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
785 /* Device driver can recover without slot reset */
786 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
788 /* Device driver wants slot to be reset */
789 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
791 /* Device has completely failed, is unrecoverable */
792 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
794 /* Device driver is fully recovered and operational */
795 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
797 /* No AER capabilities registered for the driver */
798 PCI_ERS_RESULT_NO_AER_DRIVER = (__force pci_ers_result_t) 6,
801 /* PCI bus error event callbacks */
802 struct pci_error_handlers {
803 /* PCI bus error detected on this device */
804 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
805 pci_channel_state_t error);
807 /* MMIO has been re-enabled, but not DMA */
808 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
810 /* PCI slot has been reset */
811 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
813 /* PCI function reset prepare or completed */
814 void (*reset_prepare)(struct pci_dev *dev);
815 void (*reset_done)(struct pci_dev *dev);
817 /* Device driver may resume normal operations */
818 void (*resume)(struct pci_dev *dev);
825 * struct pci_driver - PCI driver structure
826 * @node: List of driver structures.
827 * @name: Driver name.
828 * @id_table: Pointer to table of device IDs the driver is
829 * interested in. Most drivers should export this
830 * table using MODULE_DEVICE_TABLE(pci,...).
831 * @probe: This probing function gets called (during execution
832 * of pci_register_driver() for already existing
833 * devices or later if a new device gets inserted) for
834 * all PCI devices which match the ID table and are not
835 * "owned" by the other drivers yet. This function gets
836 * passed a "struct pci_dev \*" for each device whose
837 * entry in the ID table matches the device. The probe
838 * function returns zero when the driver chooses to
839 * take "ownership" of the device or an error code
840 * (negative number) otherwise.
841 * The probe function always gets called from process
842 * context, so it can sleep.
843 * @remove: The remove() function gets called whenever a device
844 * being handled by this driver is removed (either during
845 * deregistration of the driver or when it's manually
846 * pulled out of a hot-pluggable slot).
847 * The remove function always gets called from process
848 * context, so it can sleep.
849 * @suspend: Put device into low power state.
850 * @resume: Wake device from low power state.
851 * (Please see Documentation/power/pci.rst for descriptions
852 * of PCI Power Management and the related functions.)
853 * @shutdown: Hook into reboot_notifier_list (kernel/sys.c).
854 * Intended to stop any idling DMA operations.
855 * Useful for enabling wake-on-lan (NIC) or changing
856 * the power state of a device before reboot.
857 * e.g. drivers/net/e100.c.
858 * @sriov_configure: Optional driver callback to allow configuration of
859 * number of VFs to enable via sysfs "sriov_numvfs" file.
860 * @sriov_set_msix_vec_count: PF Driver callback to change number of MSI-X
861 * vectors on a VF. Triggered via sysfs "sriov_vf_msix_count".
862 * This will change MSI-X Table Size in the VF Message Control
864 * @sriov_get_vf_total_msix: PF driver callback to get the total number of
865 * MSI-X vectors available for distribution to the VFs.
866 * @err_handler: See Documentation/PCI/pci-error-recovery.rst
867 * @groups: Sysfs attribute groups.
868 * @dev_groups: Attributes attached to the device that will be
869 * created once it is bound to the driver.
870 * @driver: Driver model structure.
871 * @dynids: List of dynamically added device IDs.
874 struct list_head node;
876 const struct pci_device_id *id_table; /* Must be non-NULL for probe to be called */
877 int (*probe)(struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
878 void (*remove)(struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
879 int (*suspend)(struct pci_dev *dev, pm_message_t state); /* Device suspended */
880 int (*resume)(struct pci_dev *dev); /* Device woken up */
881 void (*shutdown)(struct pci_dev *dev);
882 int (*sriov_configure)(struct pci_dev *dev, int num_vfs); /* On PF */
883 int (*sriov_set_msix_vec_count)(struct pci_dev *vf, int msix_vec_count); /* On PF */
884 u32 (*sriov_get_vf_total_msix)(struct pci_dev *pf);
885 const struct pci_error_handlers *err_handler;
886 const struct attribute_group **groups;
887 const struct attribute_group **dev_groups;
888 struct device_driver driver;
889 struct pci_dynids dynids;
892 #define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
895 * PCI_DEVICE - macro used to describe a specific PCI device
896 * @vend: the 16 bit PCI Vendor ID
897 * @dev: the 16 bit PCI Device ID
899 * This macro is used to create a struct pci_device_id that matches a
900 * specific device. The subvendor and subdevice fields will be set to
903 #define PCI_DEVICE(vend,dev) \
904 .vendor = (vend), .device = (dev), \
905 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
908 * PCI_DEVICE_SUB - macro used to describe a specific PCI device with subsystem
909 * @vend: the 16 bit PCI Vendor ID
910 * @dev: the 16 bit PCI Device ID
911 * @subvend: the 16 bit PCI Subvendor ID
912 * @subdev: the 16 bit PCI Subdevice ID
914 * This macro is used to create a struct pci_device_id that matches a
915 * specific device with subsystem information.
917 #define PCI_DEVICE_SUB(vend, dev, subvend, subdev) \
918 .vendor = (vend), .device = (dev), \
919 .subvendor = (subvend), .subdevice = (subdev)
922 * PCI_DEVICE_CLASS - macro used to describe a specific PCI device class
923 * @dev_class: the class, subclass, prog-if triple for this device
924 * @dev_class_mask: the class mask for this device
926 * This macro is used to create a struct pci_device_id that matches a
927 * specific PCI class. The vendor, device, subvendor, and subdevice
928 * fields will be set to PCI_ANY_ID.
930 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
931 .class = (dev_class), .class_mask = (dev_class_mask), \
932 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
933 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
936 * PCI_VDEVICE - macro used to describe a specific PCI device in short form
937 * @vend: the vendor name
938 * @dev: the 16 bit PCI Device ID
940 * This macro is used to create a struct pci_device_id that matches a
941 * specific PCI device. The subvendor, and subdevice fields will be set
942 * to PCI_ANY_ID. The macro allows the next field to follow as the device
945 #define PCI_VDEVICE(vend, dev) \
946 .vendor = PCI_VENDOR_ID_##vend, .device = (dev), \
947 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0
950 * PCI_DEVICE_DATA - macro used to describe a specific PCI device in very short form
951 * @vend: the vendor name (without PCI_VENDOR_ID_ prefix)
952 * @dev: the device name (without PCI_DEVICE_ID_<vend>_ prefix)
953 * @data: the driver data to be filled
955 * This macro is used to create a struct pci_device_id that matches a
956 * specific PCI device. The subvendor, and subdevice fields will be set
959 #define PCI_DEVICE_DATA(vend, dev, data) \
960 .vendor = PCI_VENDOR_ID_##vend, .device = PCI_DEVICE_ID_##vend##_##dev, \
961 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0, \
962 .driver_data = (kernel_ulong_t)(data)
965 PCI_REASSIGN_ALL_RSRC = 0x00000001, /* Ignore firmware setup */
966 PCI_REASSIGN_ALL_BUS = 0x00000002, /* Reassign all bus numbers */
967 PCI_PROBE_ONLY = 0x00000004, /* Use existing setup */
968 PCI_CAN_SKIP_ISA_ALIGN = 0x00000008, /* Don't do ISA alignment */
969 PCI_ENABLE_PROC_DOMAINS = 0x00000010, /* Enable domains in /proc */
970 PCI_COMPAT_DOMAIN_0 = 0x00000020, /* ... except domain 0 */
971 PCI_SCAN_ALL_PCIE_DEVS = 0x00000040, /* Scan all, not just dev 0 */
974 #define PCI_IRQ_LEGACY (1 << 0) /* Allow legacy interrupts */
975 #define PCI_IRQ_MSI (1 << 1) /* Allow MSI interrupts */
976 #define PCI_IRQ_MSIX (1 << 2) /* Allow MSI-X interrupts */
977 #define PCI_IRQ_AFFINITY (1 << 3) /* Auto-assign affinity */
979 /* These external functions are only available when PCI support is enabled */
982 extern unsigned int pci_flags;
984 static inline void pci_set_flags(int flags) { pci_flags = flags; }
985 static inline void pci_add_flags(int flags) { pci_flags |= flags; }
986 static inline void pci_clear_flags(int flags) { pci_flags &= ~flags; }
987 static inline int pci_has_flag(int flag) { return pci_flags & flag; }
989 void pcie_bus_configure_settings(struct pci_bus *bus);
991 enum pcie_bus_config_types {
992 PCIE_BUS_TUNE_OFF, /* Don't touch MPS at all */
993 PCIE_BUS_DEFAULT, /* Ensure MPS matches upstream bridge */
994 PCIE_BUS_SAFE, /* Use largest MPS boot-time devices support */
995 PCIE_BUS_PERFORMANCE, /* Use MPS and MRRS for best performance */
996 PCIE_BUS_PEER2PEER, /* Set MPS = 128 for all devices */
999 extern enum pcie_bus_config_types pcie_bus_config;
1001 extern struct bus_type pci_bus_type;
1003 /* Do NOT directly access these two variables, unless you are arch-specific PCI
1004 * code, or PCI core code. */
1005 extern struct list_head pci_root_buses; /* List of all known PCI buses */
1006 /* Some device drivers need know if PCI is initiated */
1007 int no_pci_devices(void);
1009 void pcibios_resource_survey_bus(struct pci_bus *bus);
1010 void pcibios_bus_add_device(struct pci_dev *pdev);
1011 void pcibios_add_bus(struct pci_bus *bus);
1012 void pcibios_remove_bus(struct pci_bus *bus);
1013 void pcibios_fixup_bus(struct pci_bus *);
1014 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
1015 /* Architecture-specific versions may override this (weak) */
1016 char *pcibios_setup(char *str);
1018 /* Used only when drivers/pci/setup.c is used */
1019 resource_size_t pcibios_align_resource(void *, const struct resource *,
1023 /* Weak but can be overridden by arch */
1024 void pci_fixup_cardbus(struct pci_bus *);
1026 /* Generic PCI functions used internally */
1028 void pcibios_resource_to_bus(struct pci_bus *bus, struct pci_bus_region *region,
1029 struct resource *res);
1030 void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
1031 struct pci_bus_region *region);
1032 void pcibios_scan_specific_bus(int busn);
1033 struct pci_bus *pci_find_bus(int domain, int busnr);
1034 void pci_bus_add_devices(const struct pci_bus *bus);
1035 struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
1036 struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
1037 struct pci_ops *ops, void *sysdata,
1038 struct list_head *resources);
1039 int pci_host_probe(struct pci_host_bridge *bridge);
1040 int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
1041 int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax);
1042 void pci_bus_release_busn_res(struct pci_bus *b);
1043 struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
1044 struct pci_ops *ops, void *sysdata,
1045 struct list_head *resources);
1046 int pci_scan_root_bus_bridge(struct pci_host_bridge *bridge);
1047 struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
1049 struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
1051 struct hotplug_slot *hotplug);
1052 void pci_destroy_slot(struct pci_slot *slot);
1054 void pci_dev_assign_slot(struct pci_dev *dev);
1056 static inline void pci_dev_assign_slot(struct pci_dev *dev) { }
1058 int pci_scan_slot(struct pci_bus *bus, int devfn);
1059 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
1060 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
1061 unsigned int pci_scan_child_bus(struct pci_bus *bus);
1062 void pci_bus_add_device(struct pci_dev *dev);
1063 void pci_read_bridge_bases(struct pci_bus *child);
1064 struct resource *pci_find_parent_resource(const struct pci_dev *dev,
1065 struct resource *res);
1066 u8 pci_swizzle_interrupt_pin(const struct pci_dev *dev, u8 pin);
1067 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
1068 u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
1069 struct pci_dev *pci_dev_get(struct pci_dev *dev);
1070 void pci_dev_put(struct pci_dev *dev);
1071 void pci_remove_bus(struct pci_bus *b);
1072 void pci_stop_and_remove_bus_device(struct pci_dev *dev);
1073 void pci_stop_and_remove_bus_device_locked(struct pci_dev *dev);
1074 void pci_stop_root_bus(struct pci_bus *bus);
1075 void pci_remove_root_bus(struct pci_bus *bus);
1076 void pci_setup_cardbus(struct pci_bus *bus);
1077 void pcibios_setup_bridge(struct pci_bus *bus, unsigned long type);
1078 void pci_sort_breadthfirst(void);
1079 #define dev_is_pci(d) ((d)->bus == &pci_bus_type)
1080 #define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false))
1082 /* Generic PCI functions exported to card drivers */
1084 u8 pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
1085 u8 pci_find_capability(struct pci_dev *dev, int cap);
1086 u8 pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
1087 u8 pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
1088 u8 pci_find_next_ht_capability(struct pci_dev *dev, u8 pos, int ht_cap);
1089 u16 pci_find_ext_capability(struct pci_dev *dev, int cap);
1090 u16 pci_find_next_ext_capability(struct pci_dev *dev, u16 pos, int cap);
1091 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
1092 u16 pci_find_vsec_capability(struct pci_dev *dev, u16 vendor, int cap);
1094 u64 pci_get_dsn(struct pci_dev *dev);
1096 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
1097 struct pci_dev *from);
1098 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
1099 unsigned int ss_vendor, unsigned int ss_device,
1100 struct pci_dev *from);
1101 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
1102 struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
1103 unsigned int devfn);
1104 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
1105 int pci_dev_present(const struct pci_device_id *ids);
1107 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
1108 int where, u8 *val);
1109 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
1110 int where, u16 *val);
1111 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
1112 int where, u32 *val);
1113 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
1115 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
1116 int where, u16 val);
1117 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
1118 int where, u32 val);
1120 int pci_generic_config_read(struct pci_bus *bus, unsigned int devfn,
1121 int where, int size, u32 *val);
1122 int pci_generic_config_write(struct pci_bus *bus, unsigned int devfn,
1123 int where, int size, u32 val);
1124 int pci_generic_config_read32(struct pci_bus *bus, unsigned int devfn,
1125 int where, int size, u32 *val);
1126 int pci_generic_config_write32(struct pci_bus *bus, unsigned int devfn,
1127 int where, int size, u32 val);
1129 struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
1131 int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val);
1132 int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val);
1133 int pci_read_config_dword(const struct pci_dev *dev, int where, u32 *val);
1134 int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val);
1135 int pci_write_config_word(const struct pci_dev *dev, int where, u16 val);
1136 int pci_write_config_dword(const struct pci_dev *dev, int where, u32 val);
1138 int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val);
1139 int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val);
1140 int pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val);
1141 int pcie_capability_write_dword(struct pci_dev *dev, int pos, u32 val);
1142 int pcie_capability_clear_and_set_word(struct pci_dev *dev, int pos,
1143 u16 clear, u16 set);
1144 int pcie_capability_clear_and_set_dword(struct pci_dev *dev, int pos,
1145 u32 clear, u32 set);
1147 static inline int pcie_capability_set_word(struct pci_dev *dev, int pos,
1150 return pcie_capability_clear_and_set_word(dev, pos, 0, set);
1153 static inline int pcie_capability_set_dword(struct pci_dev *dev, int pos,
1156 return pcie_capability_clear_and_set_dword(dev, pos, 0, set);
1159 static inline int pcie_capability_clear_word(struct pci_dev *dev, int pos,
1162 return pcie_capability_clear_and_set_word(dev, pos, clear, 0);
1165 static inline int pcie_capability_clear_dword(struct pci_dev *dev, int pos,
1168 return pcie_capability_clear_and_set_dword(dev, pos, clear, 0);
1171 /* User-space driven config access */
1172 int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
1173 int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
1174 int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val);
1175 int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val);
1176 int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val);
1177 int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val);
1179 int __must_check pci_enable_device(struct pci_dev *dev);
1180 int __must_check pci_enable_device_io(struct pci_dev *dev);
1181 int __must_check pci_enable_device_mem(struct pci_dev *dev);
1182 int __must_check pci_reenable_device(struct pci_dev *);
1183 int __must_check pcim_enable_device(struct pci_dev *pdev);
1184 void pcim_pin_device(struct pci_dev *pdev);
1186 static inline bool pci_intx_mask_supported(struct pci_dev *pdev)
1189 * INTx masking is supported if PCI_COMMAND_INTX_DISABLE is
1190 * writable and no quirk has marked the feature broken.
1192 return !pdev->broken_intx_masking;
1195 static inline int pci_is_enabled(struct pci_dev *pdev)
1197 return (atomic_read(&pdev->enable_cnt) > 0);
1200 static inline int pci_is_managed(struct pci_dev *pdev)
1202 return pdev->is_managed;
1205 void pci_disable_device(struct pci_dev *dev);
1207 extern unsigned int pcibios_max_latency;
1208 void pci_set_master(struct pci_dev *dev);
1209 void pci_clear_master(struct pci_dev *dev);
1211 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
1212 int pci_set_cacheline_size(struct pci_dev *dev);
1213 int __must_check pci_set_mwi(struct pci_dev *dev);
1214 int __must_check pcim_set_mwi(struct pci_dev *dev);
1215 int pci_try_set_mwi(struct pci_dev *dev);
1216 void pci_clear_mwi(struct pci_dev *dev);
1217 void pci_disable_parity(struct pci_dev *dev);
1218 void pci_intx(struct pci_dev *dev, int enable);
1219 bool pci_check_and_mask_intx(struct pci_dev *dev);
1220 bool pci_check_and_unmask_intx(struct pci_dev *dev);
1221 int pci_wait_for_pending(struct pci_dev *dev, int pos, u16 mask);
1222 int pci_wait_for_pending_transaction(struct pci_dev *dev);
1223 int pcix_get_max_mmrbc(struct pci_dev *dev);
1224 int pcix_get_mmrbc(struct pci_dev *dev);
1225 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
1226 int pcie_get_readrq(struct pci_dev *dev);
1227 int pcie_set_readrq(struct pci_dev *dev, int rq);
1228 int pcie_get_mps(struct pci_dev *dev);
1229 int pcie_set_mps(struct pci_dev *dev, int mps);
1230 u32 pcie_bandwidth_available(struct pci_dev *dev, struct pci_dev **limiting_dev,
1231 enum pci_bus_speed *speed,
1232 enum pcie_link_width *width);
1233 void pcie_print_link_status(struct pci_dev *dev);
1234 int pcie_reset_flr(struct pci_dev *dev, bool probe);
1235 int pcie_flr(struct pci_dev *dev);
1236 int __pci_reset_function_locked(struct pci_dev *dev);
1237 int pci_reset_function(struct pci_dev *dev);
1238 int pci_reset_function_locked(struct pci_dev *dev);
1239 int pci_try_reset_function(struct pci_dev *dev);
1240 int pci_probe_reset_slot(struct pci_slot *slot);
1241 int pci_probe_reset_bus(struct pci_bus *bus);
1242 int pci_reset_bus(struct pci_dev *dev);
1243 void pci_reset_secondary_bus(struct pci_dev *dev);
1244 void pcibios_reset_secondary_bus(struct pci_dev *dev);
1245 void pci_update_resource(struct pci_dev *dev, int resno);
1246 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
1247 int __must_check pci_reassign_resource(struct pci_dev *dev, int i, resource_size_t add_size, resource_size_t align);
1248 void pci_release_resource(struct pci_dev *dev, int resno);
1249 static inline int pci_rebar_bytes_to_size(u64 bytes)
1251 bytes = roundup_pow_of_two(bytes);
1253 /* Return BAR size as defined in the resizable BAR specification */
1254 return max(ilog2(bytes), 20) - 20;
1257 u32 pci_rebar_get_possible_sizes(struct pci_dev *pdev, int bar);
1258 int __must_check pci_resize_resource(struct pci_dev *dev, int i, int size);
1259 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
1260 bool pci_device_is_present(struct pci_dev *pdev);
1261 void pci_ignore_hotplug(struct pci_dev *dev);
1262 struct pci_dev *pci_real_dma_dev(struct pci_dev *dev);
1263 int pci_status_get_and_clear_errors(struct pci_dev *pdev);
1265 int __printf(6, 7) pci_request_irq(struct pci_dev *dev, unsigned int nr,
1266 irq_handler_t handler, irq_handler_t thread_fn, void *dev_id,
1267 const char *fmt, ...);
1268 void pci_free_irq(struct pci_dev *dev, unsigned int nr, void *dev_id);
1270 /* ROM control related routines */
1271 int pci_enable_rom(struct pci_dev *pdev);
1272 void pci_disable_rom(struct pci_dev *pdev);
1273 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
1274 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
1276 /* Power management related routines */
1277 int pci_save_state(struct pci_dev *dev);
1278 void pci_restore_state(struct pci_dev *dev);
1279 struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev);
1280 int pci_load_saved_state(struct pci_dev *dev,
1281 struct pci_saved_state *state);
1282 int pci_load_and_free_saved_state(struct pci_dev *dev,
1283 struct pci_saved_state **state);
1284 int pci_platform_power_transition(struct pci_dev *dev, pci_power_t state);
1285 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
1286 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
1287 bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
1288 void pci_pme_active(struct pci_dev *dev, bool enable);
1289 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable);
1290 int pci_wake_from_d3(struct pci_dev *dev, bool enable);
1291 int pci_prepare_to_sleep(struct pci_dev *dev);
1292 int pci_back_from_sleep(struct pci_dev *dev);
1293 bool pci_dev_run_wake(struct pci_dev *dev);
1294 void pci_d3cold_enable(struct pci_dev *dev);
1295 void pci_d3cold_disable(struct pci_dev *dev);
1296 bool pcie_relaxed_ordering_enabled(struct pci_dev *dev);
1297 void pci_resume_bus(struct pci_bus *bus);
1298 void pci_bus_set_current_state(struct pci_bus *bus, pci_power_t state);
1300 /* For use by arch with custom probe code */
1301 void set_pcie_port_type(struct pci_dev *pdev);
1302 void set_pcie_hotplug_bridge(struct pci_dev *pdev);
1304 /* Functions for PCI Hotplug drivers to use */
1305 unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge);
1306 unsigned int pci_rescan_bus(struct pci_bus *bus);
1307 void pci_lock_rescan_remove(void);
1308 void pci_unlock_rescan_remove(void);
1310 /* Vital Product Data routines */
1311 ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
1312 ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
1314 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
1315 resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx);
1316 void pci_bus_assign_resources(const struct pci_bus *bus);
1317 void pci_bus_claim_resources(struct pci_bus *bus);
1318 void pci_bus_size_bridges(struct pci_bus *bus);
1319 int pci_claim_resource(struct pci_dev *, int);
1320 int pci_claim_bridge_resource(struct pci_dev *bridge, int i);
1321 void pci_assign_unassigned_resources(void);
1322 void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
1323 void pci_assign_unassigned_bus_resources(struct pci_bus *bus);
1324 void pci_assign_unassigned_root_bus_resources(struct pci_bus *bus);
1325 int pci_reassign_bridge_resources(struct pci_dev *bridge, unsigned long type);
1326 void pdev_enable_device(struct pci_dev *);
1327 int pci_enable_resources(struct pci_dev *, int mask);
1328 void pci_assign_irq(struct pci_dev *dev);
1329 struct resource *pci_find_resource(struct pci_dev *dev, struct resource *res);
1330 #define HAVE_PCI_REQ_REGIONS 2
1331 int __must_check pci_request_regions(struct pci_dev *, const char *);
1332 int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
1333 void pci_release_regions(struct pci_dev *);
1334 int __must_check pci_request_region(struct pci_dev *, int, const char *);
1335 void pci_release_region(struct pci_dev *, int);
1336 int pci_request_selected_regions(struct pci_dev *, int, const char *);
1337 int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
1338 void pci_release_selected_regions(struct pci_dev *, int);
1340 /* drivers/pci/bus.c */
1341 void pci_add_resource(struct list_head *resources, struct resource *res);
1342 void pci_add_resource_offset(struct list_head *resources, struct resource *res,
1343 resource_size_t offset);
1344 void pci_free_resource_list(struct list_head *resources);
1345 void pci_bus_add_resource(struct pci_bus *bus, struct resource *res,
1346 unsigned int flags);
1347 struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n);
1348 void pci_bus_remove_resources(struct pci_bus *bus);
1349 int devm_request_pci_bus_resources(struct device *dev,
1350 struct list_head *resources);
1352 /* Temporary until new and working PCI SBR API in place */
1353 int pci_bridge_secondary_bus_reset(struct pci_dev *dev);
1355 #define pci_bus_for_each_resource(bus, res, i) \
1357 (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
1360 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
1361 struct resource *res, resource_size_t size,
1362 resource_size_t align, resource_size_t min,
1363 unsigned long type_mask,
1364 resource_size_t (*alignf)(void *,
1365 const struct resource *,
1371 int pci_register_io_range(struct fwnode_handle *fwnode, phys_addr_t addr,
1372 resource_size_t size);
1373 unsigned long pci_address_to_pio(phys_addr_t addr);
1374 phys_addr_t pci_pio_to_address(unsigned long pio);
1375 int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr);
1376 int devm_pci_remap_iospace(struct device *dev, const struct resource *res,
1377 phys_addr_t phys_addr);
1378 void pci_unmap_iospace(struct resource *res);
1379 void __iomem *devm_pci_remap_cfgspace(struct device *dev,
1380 resource_size_t offset,
1381 resource_size_t size);
1382 void __iomem *devm_pci_remap_cfg_resource(struct device *dev,
1383 struct resource *res);
1385 static inline pci_bus_addr_t pci_bus_address(struct pci_dev *pdev, int bar)
1387 struct pci_bus_region region;
1389 pcibios_resource_to_bus(pdev->bus, ®ion, &pdev->resource[bar]);
1390 return region.start;
1393 /* Proper probing supporting hot-pluggable devices */
1394 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
1395 const char *mod_name);
1397 /* pci_register_driver() must be a macro so KBUILD_MODNAME can be expanded */
1398 #define pci_register_driver(driver) \
1399 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
1401 void pci_unregister_driver(struct pci_driver *dev);
1404 * module_pci_driver() - Helper macro for registering a PCI driver
1405 * @__pci_driver: pci_driver struct
1407 * Helper macro for PCI drivers which do not do anything special in module
1408 * init/exit. This eliminates a lot of boilerplate. Each module may only
1409 * use this macro once, and calling it replaces module_init() and module_exit()
1411 #define module_pci_driver(__pci_driver) \
1412 module_driver(__pci_driver, pci_register_driver, pci_unregister_driver)
1415 * builtin_pci_driver() - Helper macro for registering a PCI driver
1416 * @__pci_driver: pci_driver struct
1418 * Helper macro for PCI drivers which do not do anything special in their
1419 * init code. This eliminates a lot of boilerplate. Each driver may only
1420 * use this macro once, and calling it replaces device_initcall(...)
1422 #define builtin_pci_driver(__pci_driver) \
1423 builtin_driver(__pci_driver, pci_register_driver)
1425 struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
1426 int pci_add_dynid(struct pci_driver *drv,
1427 unsigned int vendor, unsigned int device,
1428 unsigned int subvendor, unsigned int subdevice,
1429 unsigned int class, unsigned int class_mask,
1430 unsigned long driver_data);
1431 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
1432 struct pci_dev *dev);
1433 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
1436 void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
1438 int pci_cfg_space_size(struct pci_dev *dev);
1439 unsigned char pci_bus_max_busnr(struct pci_bus *bus);
1440 void pci_setup_bridge(struct pci_bus *bus);
1441 resource_size_t pcibios_window_alignment(struct pci_bus *bus,
1442 unsigned long type);
1444 #define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
1445 #define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)
1447 int pci_set_vga_state(struct pci_dev *pdev, bool decode,
1448 unsigned int command_bits, u32 flags);
1451 * Virtual interrupts allow for more interrupts to be allocated
1452 * than the device has interrupts for. These are not programmed
1453 * into the device's MSI-X table and must be handled by some
1454 * other driver means.
1456 #define PCI_IRQ_VIRTUAL (1 << 4)
1458 #define PCI_IRQ_ALL_TYPES \
1459 (PCI_IRQ_LEGACY | PCI_IRQ_MSI | PCI_IRQ_MSIX)
1461 /* kmem_cache style wrapper around pci_alloc_consistent() */
1463 #include <linux/dmapool.h>
1465 #define pci_pool dma_pool
1466 #define pci_pool_create(name, pdev, size, align, allocation) \
1467 dma_pool_create(name, &pdev->dev, size, align, allocation)
1468 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
1469 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
1470 #define pci_pool_zalloc(pool, flags, handle) \
1471 dma_pool_zalloc(pool, flags, handle)
1472 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
1475 u32 vector; /* Kernel uses to write allocated vector */
1476 u16 entry; /* Driver uses to specify entry, OS writes */
1479 #ifdef CONFIG_PCI_MSI
1480 int pci_msi_vec_count(struct pci_dev *dev);
1481 void pci_disable_msi(struct pci_dev *dev);
1482 int pci_msix_vec_count(struct pci_dev *dev);
1483 void pci_disable_msix(struct pci_dev *dev);
1484 void pci_restore_msi_state(struct pci_dev *dev);
1485 int pci_msi_enabled(void);
1486 int pci_enable_msi(struct pci_dev *dev);
1487 int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
1488 int minvec, int maxvec);
1489 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1490 struct msix_entry *entries, int nvec)
1492 int rc = pci_enable_msix_range(dev, entries, nvec, nvec);
1497 int pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1498 unsigned int max_vecs, unsigned int flags,
1499 struct irq_affinity *affd);
1501 void pci_free_irq_vectors(struct pci_dev *dev);
1502 int pci_irq_vector(struct pci_dev *dev, unsigned int nr);
1503 const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev, int vec);
1506 static inline int pci_msi_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1507 static inline void pci_disable_msi(struct pci_dev *dev) { }
1508 static inline int pci_msix_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1509 static inline void pci_disable_msix(struct pci_dev *dev) { }
1510 static inline void pci_restore_msi_state(struct pci_dev *dev) { }
1511 static inline int pci_msi_enabled(void) { return 0; }
1512 static inline int pci_enable_msi(struct pci_dev *dev)
1514 static inline int pci_enable_msix_range(struct pci_dev *dev,
1515 struct msix_entry *entries, int minvec, int maxvec)
1517 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1518 struct msix_entry *entries, int nvec)
1522 pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1523 unsigned int max_vecs, unsigned int flags,
1524 struct irq_affinity *aff_desc)
1526 if ((flags & PCI_IRQ_LEGACY) && min_vecs == 1 && dev->irq)
1531 static inline void pci_free_irq_vectors(struct pci_dev *dev)
1535 static inline int pci_irq_vector(struct pci_dev *dev, unsigned int nr)
1537 if (WARN_ON_ONCE(nr > 0))
1541 static inline const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev,
1544 return cpu_possible_mask;
1549 * pci_irqd_intx_xlate() - Translate PCI INTx value to an IRQ domain hwirq
1550 * @d: the INTx IRQ domain
1551 * @node: the DT node for the device whose interrupt we're translating
1552 * @intspec: the interrupt specifier data from the DT
1553 * @intsize: the number of entries in @intspec
1554 * @out_hwirq: pointer at which to write the hwirq number
1555 * @out_type: pointer at which to write the interrupt type
1557 * Translate a PCI INTx interrupt number from device tree in the range 1-4, as
1558 * stored in the standard PCI_INTERRUPT_PIN register, to a value in the range
1559 * 0-3 suitable for use in a 4 entry IRQ domain. That is, subtract one from the
1560 * INTx value to obtain the hwirq number.
1562 * Returns 0 on success, or -EINVAL if the interrupt specifier is out of range.
1564 static inline int pci_irqd_intx_xlate(struct irq_domain *d,
1565 struct device_node *node,
1567 unsigned int intsize,
1568 unsigned long *out_hwirq,
1569 unsigned int *out_type)
1571 const u32 intx = intspec[0];
1573 if (intx < PCI_INTERRUPT_INTA || intx > PCI_INTERRUPT_INTD)
1576 *out_hwirq = intx - PCI_INTERRUPT_INTA;
1580 #ifdef CONFIG_PCIEPORTBUS
1581 extern bool pcie_ports_disabled;
1582 extern bool pcie_ports_native;
1584 #define pcie_ports_disabled true
1585 #define pcie_ports_native false
1588 #define PCIE_LINK_STATE_L0S BIT(0)
1589 #define PCIE_LINK_STATE_L1 BIT(1)
1590 #define PCIE_LINK_STATE_CLKPM BIT(2)
1591 #define PCIE_LINK_STATE_L1_1 BIT(3)
1592 #define PCIE_LINK_STATE_L1_2 BIT(4)
1593 #define PCIE_LINK_STATE_L1_1_PCIPM BIT(5)
1594 #define PCIE_LINK_STATE_L1_2_PCIPM BIT(6)
1596 #ifdef CONFIG_PCIEASPM
1597 int pci_disable_link_state(struct pci_dev *pdev, int state);
1598 int pci_disable_link_state_locked(struct pci_dev *pdev, int state);
1599 void pcie_no_aspm(void);
1600 bool pcie_aspm_support_enabled(void);
1601 bool pcie_aspm_enabled(struct pci_dev *pdev);
1603 static inline int pci_disable_link_state(struct pci_dev *pdev, int state)
1605 static inline int pci_disable_link_state_locked(struct pci_dev *pdev, int state)
1607 static inline void pcie_no_aspm(void) { }
1608 static inline bool pcie_aspm_support_enabled(void) { return false; }
1609 static inline bool pcie_aspm_enabled(struct pci_dev *pdev) { return false; }
1612 #ifdef CONFIG_PCIEAER
1613 bool pci_aer_available(void);
1615 static inline bool pci_aer_available(void) { return false; }
1618 bool pci_ats_disabled(void);
1620 void pci_cfg_access_lock(struct pci_dev *dev);
1621 bool pci_cfg_access_trylock(struct pci_dev *dev);
1622 void pci_cfg_access_unlock(struct pci_dev *dev);
1624 int pci_dev_trylock(struct pci_dev *dev);
1625 void pci_dev_unlock(struct pci_dev *dev);
1628 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
1629 * a PCI domain is defined to be a set of PCI buses which share
1630 * configuration space.
1632 #ifdef CONFIG_PCI_DOMAINS
1633 extern int pci_domains_supported;
1635 enum { pci_domains_supported = 0 };
1636 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1637 static inline int pci_proc_domain(struct pci_bus *bus) { return 0; }
1638 #endif /* CONFIG_PCI_DOMAINS */
1641 * Generic implementation for PCI domain support. If your
1642 * architecture does not need custom management of PCI
1643 * domains then this implementation will be used
1645 #ifdef CONFIG_PCI_DOMAINS_GENERIC
1646 static inline int pci_domain_nr(struct pci_bus *bus)
1648 return bus->domain_nr;
1651 int acpi_pci_bus_find_domain_nr(struct pci_bus *bus);
1653 static inline int acpi_pci_bus_find_domain_nr(struct pci_bus *bus)
1656 int pci_bus_find_domain_nr(struct pci_bus *bus, struct device *parent);
1659 /* Some architectures require additional setup to direct VGA traffic */
1660 typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
1661 unsigned int command_bits, u32 flags);
1662 void pci_register_set_vga_state(arch_set_vga_state_t func);
1665 pci_request_io_regions(struct pci_dev *pdev, const char *name)
1667 return pci_request_selected_regions(pdev,
1668 pci_select_bars(pdev, IORESOURCE_IO), name);
1672 pci_release_io_regions(struct pci_dev *pdev)
1674 return pci_release_selected_regions(pdev,
1675 pci_select_bars(pdev, IORESOURCE_IO));
1679 pci_request_mem_regions(struct pci_dev *pdev, const char *name)
1681 return pci_request_selected_regions(pdev,
1682 pci_select_bars(pdev, IORESOURCE_MEM), name);
1686 pci_release_mem_regions(struct pci_dev *pdev)
1688 return pci_release_selected_regions(pdev,
1689 pci_select_bars(pdev, IORESOURCE_MEM));
1692 #else /* CONFIG_PCI is not enabled */
1694 static inline void pci_set_flags(int flags) { }
1695 static inline void pci_add_flags(int flags) { }
1696 static inline void pci_clear_flags(int flags) { }
1697 static inline int pci_has_flag(int flag) { return 0; }
1700 * If the system does not have PCI, clearly these return errors. Define
1701 * these as simple inline functions to avoid hair in drivers.
1703 #define _PCI_NOP(o, s, t) \
1704 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
1706 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
1708 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
1709 _PCI_NOP(o, word, u16 x) \
1710 _PCI_NOP(o, dword, u32 x)
1711 _PCI_NOP_ALL(read, *)
1712 _PCI_NOP_ALL(write,)
1714 static inline struct pci_dev *pci_get_device(unsigned int vendor,
1715 unsigned int device,
1716 struct pci_dev *from)
1719 static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
1720 unsigned int device,
1721 unsigned int ss_vendor,
1722 unsigned int ss_device,
1723 struct pci_dev *from)
1726 static inline struct pci_dev *pci_get_class(unsigned int class,
1727 struct pci_dev *from)
1730 #define pci_dev_present(ids) (0)
1731 #define no_pci_devices() (1)
1732 #define pci_dev_put(dev) do { } while (0)
1734 static inline void pci_set_master(struct pci_dev *dev) { }
1735 static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
1736 static inline void pci_disable_device(struct pci_dev *dev) { }
1737 static inline int pcim_enable_device(struct pci_dev *pdev) { return -EIO; }
1738 static inline int pci_assign_resource(struct pci_dev *dev, int i)
1740 static inline int __must_check __pci_register_driver(struct pci_driver *drv,
1741 struct module *owner,
1742 const char *mod_name)
1744 static inline int pci_register_driver(struct pci_driver *drv)
1746 static inline void pci_unregister_driver(struct pci_driver *drv) { }
1747 static inline u8 pci_find_capability(struct pci_dev *dev, int cap)
1749 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
1752 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
1755 static inline u64 pci_get_dsn(struct pci_dev *dev)
1758 /* Power management related routines */
1759 static inline int pci_save_state(struct pci_dev *dev) { return 0; }
1760 static inline void pci_restore_state(struct pci_dev *dev) { }
1761 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
1763 static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable)
1765 static inline pci_power_t pci_choose_state(struct pci_dev *dev,
1768 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1772 static inline struct resource *pci_find_resource(struct pci_dev *dev,
1773 struct resource *res)
1775 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
1777 static inline void pci_release_regions(struct pci_dev *dev) { }
1779 static inline int pci_register_io_range(struct fwnode_handle *fwnode,
1780 phys_addr_t addr, resource_size_t size)
1783 static inline unsigned long pci_address_to_pio(phys_addr_t addr) { return -1; }
1785 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
1787 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
1790 static inline struct pci_dev *pci_get_domain_bus_and_slot(int domain,
1791 unsigned int bus, unsigned int devfn)
1794 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1795 static inline struct pci_dev *pci_dev_get(struct pci_dev *dev) { return NULL; }
1797 #define dev_is_pci(d) (false)
1798 #define dev_is_pf(d) (false)
1799 static inline bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags)
1801 static inline int pci_irqd_intx_xlate(struct irq_domain *d,
1802 struct device_node *node,
1804 unsigned int intsize,
1805 unsigned long *out_hwirq,
1806 unsigned int *out_type)
1809 static inline const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
1810 struct pci_dev *dev)
1812 static inline bool pci_ats_disabled(void) { return true; }
1814 static inline int pci_irq_vector(struct pci_dev *dev, unsigned int nr)
1820 pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1821 unsigned int max_vecs, unsigned int flags,
1822 struct irq_affinity *aff_desc)
1826 #endif /* CONFIG_PCI */
1829 pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs,
1830 unsigned int max_vecs, unsigned int flags)
1832 return pci_alloc_irq_vectors_affinity(dev, min_vecs, max_vecs, flags,
1836 /* Include architecture-dependent settings and functions */
1838 #include <asm/pci.h>
1840 /* These two functions provide almost identical functionality. Depending
1841 * on the architecture, one will be implemented as a wrapper around the
1842 * other (in drivers/pci/mmap.c).
1844 * pci_mmap_resource_range() maps a specific BAR, and vm->vm_pgoff
1845 * is expected to be an offset within that region.
1847 * pci_mmap_page_range() is the legacy architecture-specific interface,
1848 * which accepts a "user visible" resource address converted by
1849 * pci_resource_to_user(), as used in the legacy mmap() interface in
1852 int pci_mmap_resource_range(struct pci_dev *dev, int bar,
1853 struct vm_area_struct *vma,
1854 enum pci_mmap_state mmap_state, int write_combine);
1855 int pci_mmap_page_range(struct pci_dev *pdev, int bar,
1856 struct vm_area_struct *vma,
1857 enum pci_mmap_state mmap_state, int write_combine);
1859 #ifndef arch_can_pci_mmap_wc
1860 #define arch_can_pci_mmap_wc() 0
1863 #ifndef arch_can_pci_mmap_io
1864 #define arch_can_pci_mmap_io() 0
1865 #define pci_iobar_pfn(pdev, bar, vma) (-EINVAL)
1867 int pci_iobar_pfn(struct pci_dev *pdev, int bar, struct vm_area_struct *vma);
1870 #ifndef pci_root_bus_fwnode
1871 #define pci_root_bus_fwnode(bus) NULL
1875 * These helpers provide future and backwards compatibility
1876 * for accessing popular PCI BAR info
1878 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
1879 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
1880 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
1881 #define pci_resource_len(dev,bar) \
1882 ((pci_resource_end((dev), (bar)) == 0) ? 0 : \
1884 (pci_resource_end((dev), (bar)) - \
1885 pci_resource_start((dev), (bar)) + 1))
1888 * Similar to the helpers above, these manipulate per-pci_dev
1889 * driver-specific data. They are really just a wrapper around
1890 * the generic device structure functions of these calls.
1892 static inline void *pci_get_drvdata(struct pci_dev *pdev)
1894 return dev_get_drvdata(&pdev->dev);
1897 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
1899 dev_set_drvdata(&pdev->dev, data);
1902 static inline const char *pci_name(const struct pci_dev *pdev)
1904 return dev_name(&pdev->dev);
1907 void pci_resource_to_user(const struct pci_dev *dev, int bar,
1908 const struct resource *rsrc,
1909 resource_size_t *start, resource_size_t *end);
1912 * The world is not perfect and supplies us with broken PCI devices.
1913 * For at least a part of these bugs we need a work-around, so both
1914 * generic (drivers/pci/quirks.c) and per-architecture code can define
1915 * fixup hooks to be called for particular buggy devices.
1919 u16 vendor; /* Or PCI_ANY_ID */
1920 u16 device; /* Or PCI_ANY_ID */
1921 u32 class; /* Or PCI_ANY_ID */
1922 unsigned int class_shift; /* should be 0, 8, 16 */
1923 #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
1926 void (*hook)(struct pci_dev *dev);
1930 enum pci_fixup_pass {
1931 pci_fixup_early, /* Before probing BARs */
1932 pci_fixup_header, /* After reading configuration header */
1933 pci_fixup_final, /* Final phase of device fixups */
1934 pci_fixup_enable, /* pci_enable_device() time */
1935 pci_fixup_resume, /* pci_device_resume() */
1936 pci_fixup_suspend, /* pci_device_suspend() */
1937 pci_fixup_resume_early, /* pci_device_resume_early() */
1938 pci_fixup_suspend_late, /* pci_device_suspend_late() */
1941 #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
1942 #define ___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1943 class_shift, hook) \
1944 __ADDRESSABLE(hook) \
1945 asm(".section " #sec ", \"a\" \n" \
1947 ".short " #vendor ", " #device " \n" \
1948 ".long " #class ", " #class_shift " \n" \
1949 ".long " #hook " - . \n" \
1953 * Clang's LTO may rename static functions in C, but has no way to
1954 * handle such renamings when referenced from inline asm. To work
1955 * around this, create global C stubs for these cases.
1957 #ifdef CONFIG_LTO_CLANG
1958 #define __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1959 class_shift, hook, stub) \
1960 void __cficanonical stub(struct pci_dev *dev); \
1961 void __cficanonical stub(struct pci_dev *dev) \
1965 ___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1968 #define __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1969 class_shift, hook, stub) \
1970 ___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1974 #define DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1975 class_shift, hook) \
1976 __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1977 class_shift, hook, __UNIQUE_ID(hook))
1979 /* Anonymous variables would be nice... */
1980 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \
1981 class_shift, hook) \
1982 static const struct pci_fixup __PASTE(__pci_fixup_##name,__LINE__) __used \
1983 __attribute__((__section__(#section), aligned((sizeof(void *))))) \
1984 = { vendor, device, class, class_shift, hook };
1987 #define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class, \
1988 class_shift, hook) \
1989 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1990 hook, vendor, device, class, class_shift, hook)
1991 #define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class, \
1992 class_shift, hook) \
1993 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1994 hook, vendor, device, class, class_shift, hook)
1995 #define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class, \
1996 class_shift, hook) \
1997 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1998 hook, vendor, device, class, class_shift, hook)
1999 #define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class, \
2000 class_shift, hook) \
2001 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
2002 hook, vendor, device, class, class_shift, hook)
2003 #define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class, \
2004 class_shift, hook) \
2005 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
2006 resume##hook, vendor, device, class, class_shift, hook)
2007 #define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class, \
2008 class_shift, hook) \
2009 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
2010 resume_early##hook, vendor, device, class, class_shift, hook)
2011 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class, \
2012 class_shift, hook) \
2013 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
2014 suspend##hook, vendor, device, class, class_shift, hook)
2015 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND_LATE(vendor, device, class, \
2016 class_shift, hook) \
2017 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
2018 suspend_late##hook, vendor, device, class, class_shift, hook)
2020 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
2021 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
2022 hook, vendor, device, PCI_ANY_ID, 0, hook)
2023 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
2024 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
2025 hook, vendor, device, PCI_ANY_ID, 0, hook)
2026 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
2027 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
2028 hook, vendor, device, PCI_ANY_ID, 0, hook)
2029 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
2030 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
2031 hook, vendor, device, PCI_ANY_ID, 0, hook)
2032 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
2033 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
2034 resume##hook, vendor, device, PCI_ANY_ID, 0, hook)
2035 #define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
2036 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
2037 resume_early##hook, vendor, device, PCI_ANY_ID, 0, hook)
2038 #define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
2039 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
2040 suspend##hook, vendor, device, PCI_ANY_ID, 0, hook)
2041 #define DECLARE_PCI_FIXUP_SUSPEND_LATE(vendor, device, hook) \
2042 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
2043 suspend_late##hook, vendor, device, PCI_ANY_ID, 0, hook)
2045 #ifdef CONFIG_PCI_QUIRKS
2046 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
2048 static inline void pci_fixup_device(enum pci_fixup_pass pass,
2049 struct pci_dev *dev) { }
2052 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
2053 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
2054 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
2055 int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name);
2056 int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
2058 void pcim_iounmap_regions(struct pci_dev *pdev, int mask);
2060 extern int pci_pci_problems;
2061 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
2062 #define PCIPCI_TRITON 2
2063 #define PCIPCI_NATOMA 4
2064 #define PCIPCI_VIAETBF 8
2065 #define PCIPCI_VSFX 16
2066 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
2067 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
2069 extern unsigned long pci_cardbus_io_size;
2070 extern unsigned long pci_cardbus_mem_size;
2071 extern u8 pci_dfl_cache_line_size;
2072 extern u8 pci_cache_line_size;
2074 /* Architecture-specific versions may override these (weak) */
2075 void pcibios_disable_device(struct pci_dev *dev);
2076 void pcibios_set_master(struct pci_dev *dev);
2077 int pcibios_set_pcie_reset_state(struct pci_dev *dev,
2078 enum pcie_reset_state state);
2079 int pcibios_add_device(struct pci_dev *dev);
2080 void pcibios_release_device(struct pci_dev *dev);
2082 void pcibios_penalize_isa_irq(int irq, int active);
2084 static inline void pcibios_penalize_isa_irq(int irq, int active) {}
2086 int pcibios_alloc_irq(struct pci_dev *dev);
2087 void pcibios_free_irq(struct pci_dev *dev);
2088 resource_size_t pcibios_default_alignment(void);
2090 #if defined(CONFIG_PCI_MMCONFIG) || defined(CONFIG_ACPI_MCFG)
2091 void __init pci_mmcfg_early_init(void);
2092 void __init pci_mmcfg_late_init(void);
2094 static inline void pci_mmcfg_early_init(void) { }
2095 static inline void pci_mmcfg_late_init(void) { }
2098 int pci_ext_cfg_avail(void);
2100 void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
2101 void __iomem *pci_ioremap_wc_bar(struct pci_dev *pdev, int bar);
2103 #ifdef CONFIG_PCI_IOV
2104 int pci_iov_virtfn_bus(struct pci_dev *dev, int id);
2105 int pci_iov_virtfn_devfn(struct pci_dev *dev, int id);
2107 int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
2108 void pci_disable_sriov(struct pci_dev *dev);
2110 int pci_iov_sysfs_link(struct pci_dev *dev, struct pci_dev *virtfn, int id);
2111 int pci_iov_add_virtfn(struct pci_dev *dev, int id);
2112 void pci_iov_remove_virtfn(struct pci_dev *dev, int id);
2113 int pci_num_vf(struct pci_dev *dev);
2114 int pci_vfs_assigned(struct pci_dev *dev);
2115 int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs);
2116 int pci_sriov_get_totalvfs(struct pci_dev *dev);
2117 int pci_sriov_configure_simple(struct pci_dev *dev, int nr_virtfn);
2118 resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno);
2119 void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe);
2121 /* Arch may override these (weak) */
2122 int pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs);
2123 int pcibios_sriov_disable(struct pci_dev *pdev);
2124 resource_size_t pcibios_iov_resource_alignment(struct pci_dev *dev, int resno);
2126 static inline int pci_iov_virtfn_bus(struct pci_dev *dev, int id)
2130 static inline int pci_iov_virtfn_devfn(struct pci_dev *dev, int id)
2134 static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
2137 static inline int pci_iov_sysfs_link(struct pci_dev *dev,
2138 struct pci_dev *virtfn, int id)
2142 static inline int pci_iov_add_virtfn(struct pci_dev *dev, int id)
2146 static inline void pci_iov_remove_virtfn(struct pci_dev *dev,
2148 static inline void pci_disable_sriov(struct pci_dev *dev) { }
2149 static inline int pci_num_vf(struct pci_dev *dev) { return 0; }
2150 static inline int pci_vfs_assigned(struct pci_dev *dev)
2152 static inline int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs)
2154 static inline int pci_sriov_get_totalvfs(struct pci_dev *dev)
2156 #define pci_sriov_configure_simple NULL
2157 static inline resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno)
2159 static inline void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe) { }
2162 #if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
2163 void pci_hp_create_module_link(struct pci_slot *pci_slot);
2164 void pci_hp_remove_module_link(struct pci_slot *pci_slot);
2168 * pci_pcie_cap - get the saved PCIe capability offset
2171 * PCIe capability offset is calculated at PCI device initialization
2172 * time and saved in the data structure. This function returns saved
2173 * PCIe capability offset. Using this instead of pci_find_capability()
2174 * reduces unnecessary search in the PCI configuration space. If you
2175 * need to calculate PCIe capability offset from raw device for some
2176 * reasons, please use pci_find_capability() instead.
2178 static inline int pci_pcie_cap(struct pci_dev *dev)
2180 return dev->pcie_cap;
2184 * pci_is_pcie - check if the PCI device is PCI Express capable
2187 * Returns: true if the PCI device is PCI Express capable, false otherwise.
2189 static inline bool pci_is_pcie(struct pci_dev *dev)
2191 return pci_pcie_cap(dev);
2195 * pcie_caps_reg - get the PCIe Capabilities Register
2198 static inline u16 pcie_caps_reg(const struct pci_dev *dev)
2200 return dev->pcie_flags_reg;
2204 * pci_pcie_type - get the PCIe device/port type
2207 static inline int pci_pcie_type(const struct pci_dev *dev)
2209 return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4;
2213 * pcie_find_root_port - Get the PCIe root port device
2216 * Traverse up the parent chain and return the PCIe Root Port PCI Device
2217 * for a given PCI/PCIe Device.
2219 static inline struct pci_dev *pcie_find_root_port(struct pci_dev *dev)
2222 if (pci_is_pcie(dev) &&
2223 pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT)
2225 dev = pci_upstream_bridge(dev);
2231 void pci_request_acs(void);
2232 bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags);
2233 bool pci_acs_path_enabled(struct pci_dev *start,
2234 struct pci_dev *end, u16 acs_flags);
2235 int pci_enable_atomic_ops_to_root(struct pci_dev *dev, u32 cap_mask);
2237 #define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */
2238 #define PCI_VPD_LRDT_ID(x) ((x) | PCI_VPD_LRDT)
2240 /* Large Resource Data Type Tag Item Names */
2241 #define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */
2242 #define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */
2243 #define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */
2245 #define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING)
2246 #define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA)
2247 #define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA)
2249 #define PCI_VPD_RO_KEYWORD_PARTNO "PN"
2250 #define PCI_VPD_RO_KEYWORD_SERIALNO "SN"
2251 #define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
2252 #define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
2253 #define PCI_VPD_RO_KEYWORD_CHKSUM "RV"
2256 * pci_vpd_alloc - Allocate buffer and read VPD into it
2258 * @size: pointer to field where VPD length is returned
2260 * Returns pointer to allocated buffer or an ERR_PTR in case of failure
2262 void *pci_vpd_alloc(struct pci_dev *dev, unsigned int *size);
2265 * pci_vpd_find_id_string - Locate id string in VPD
2266 * @buf: Pointer to buffered VPD data
2267 * @len: The length of the buffer area in which to search
2268 * @size: Pointer to field where length of id string is returned
2270 * Returns the index of the id string or -ENOENT if not found.
2272 int pci_vpd_find_id_string(const u8 *buf, unsigned int len, unsigned int *size);
2275 * pci_vpd_find_ro_info_keyword - Locate info field keyword in VPD RO section
2276 * @buf: Pointer to buffered VPD data
2277 * @len: The length of the buffer area in which to search
2278 * @kw: The keyword to search for
2279 * @size: Pointer to field where length of found keyword data is returned
2281 * Returns the index of the information field keyword data or -ENOENT if
2284 int pci_vpd_find_ro_info_keyword(const void *buf, unsigned int len,
2285 const char *kw, unsigned int *size);
2288 * pci_vpd_check_csum - Check VPD checksum
2289 * @buf: Pointer to buffered VPD data
2292 * Returns 1 if VPD has no checksum, otherwise 0 or an errno
2294 int pci_vpd_check_csum(const void *buf, unsigned int len);
2296 /* PCI <-> OF binding helpers */
2300 struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus);
2301 bool pci_host_of_has_msi_map(struct device *dev);
2303 /* Arch may override this (weak) */
2304 struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus);
2306 #else /* CONFIG_OF */
2307 static inline struct irq_domain *
2308 pci_host_bridge_of_msi_domain(struct pci_bus *bus) { return NULL; }
2309 static inline bool pci_host_of_has_msi_map(struct device *dev) { return false; }
2310 #endif /* CONFIG_OF */
2312 static inline struct device_node *
2313 pci_device_to_OF_node(const struct pci_dev *pdev)
2315 return pdev ? pdev->dev.of_node : NULL;
2318 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
2320 return bus ? bus->dev.of_node : NULL;
2324 struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus);
2327 pci_msi_register_fwnode_provider(struct fwnode_handle *(*fn)(struct device *));
2328 bool pci_pr3_present(struct pci_dev *pdev);
2330 static inline struct irq_domain *
2331 pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) { return NULL; }
2332 static inline bool pci_pr3_present(struct pci_dev *pdev) { return false; }
2336 static inline struct eeh_dev *pci_dev_to_eeh_dev(struct pci_dev *pdev)
2338 return pdev->dev.archdata.edev;
2342 void pci_add_dma_alias(struct pci_dev *dev, u8 devfn_from, unsigned nr_devfns);
2343 bool pci_devs_are_dma_aliases(struct pci_dev *dev1, struct pci_dev *dev2);
2344 int pci_for_each_dma_alias(struct pci_dev *pdev,
2345 int (*fn)(struct pci_dev *pdev,
2346 u16 alias, void *data), void *data);
2348 /* Helper functions for operation of device flag */
2349 static inline void pci_set_dev_assigned(struct pci_dev *pdev)
2351 pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED;
2353 static inline void pci_clear_dev_assigned(struct pci_dev *pdev)
2355 pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
2357 static inline bool pci_is_dev_assigned(struct pci_dev *pdev)
2359 return (pdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED) == PCI_DEV_FLAGS_ASSIGNED;
2363 * pci_ari_enabled - query ARI forwarding status
2366 * Returns true if ARI forwarding is enabled.
2368 static inline bool pci_ari_enabled(struct pci_bus *bus)
2370 return bus->self && bus->self->ari_enabled;
2374 * pci_is_thunderbolt_attached - whether device is on a Thunderbolt daisy chain
2375 * @pdev: PCI device to check
2377 * Walk upwards from @pdev and check for each encountered bridge if it's part
2378 * of a Thunderbolt controller. Reaching the host bridge means @pdev is not
2379 * Thunderbolt-attached. (But rather soldered to the mainboard usually.)
2381 static inline bool pci_is_thunderbolt_attached(struct pci_dev *pdev)
2383 struct pci_dev *parent = pdev;
2385 if (pdev->is_thunderbolt)
2388 while ((parent = pci_upstream_bridge(parent)))
2389 if (parent->is_thunderbolt)
2395 #if defined(CONFIG_PCIEPORTBUS) || defined(CONFIG_EEH)
2396 void pci_uevent_ers(struct pci_dev *pdev, enum pci_ers_result err_type);
2399 /* Provide the legacy pci_dma_* API */
2400 #include <linux/pci-dma-compat.h>
2402 #define pci_printk(level, pdev, fmt, arg...) \
2403 dev_printk(level, &(pdev)->dev, fmt, ##arg)
2405 #define pci_emerg(pdev, fmt, arg...) dev_emerg(&(pdev)->dev, fmt, ##arg)
2406 #define pci_alert(pdev, fmt, arg...) dev_alert(&(pdev)->dev, fmt, ##arg)
2407 #define pci_crit(pdev, fmt, arg...) dev_crit(&(pdev)->dev, fmt, ##arg)
2408 #define pci_err(pdev, fmt, arg...) dev_err(&(pdev)->dev, fmt, ##arg)
2409 #define pci_warn(pdev, fmt, arg...) dev_warn(&(pdev)->dev, fmt, ##arg)
2410 #define pci_notice(pdev, fmt, arg...) dev_notice(&(pdev)->dev, fmt, ##arg)
2411 #define pci_info(pdev, fmt, arg...) dev_info(&(pdev)->dev, fmt, ##arg)
2412 #define pci_dbg(pdev, fmt, arg...) dev_dbg(&(pdev)->dev, fmt, ##arg)
2414 #define pci_notice_ratelimited(pdev, fmt, arg...) \
2415 dev_notice_ratelimited(&(pdev)->dev, fmt, ##arg)
2417 #define pci_info_ratelimited(pdev, fmt, arg...) \
2418 dev_info_ratelimited(&(pdev)->dev, fmt, ##arg)
2420 #define pci_WARN(pdev, condition, fmt, arg...) \
2421 WARN(condition, "%s %s: " fmt, \
2422 dev_driver_string(&(pdev)->dev), pci_name(pdev), ##arg)
2424 #define pci_WARN_ONCE(pdev, condition, fmt, arg...) \
2425 WARN_ONCE(condition, "%s %s: " fmt, \
2426 dev_driver_string(&(pdev)->dev), pci_name(pdev), ##arg)
2428 #endif /* LINUX_PCI_H */