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 6
56 * The PCI interface treats multi-function devices as independent
57 * devices. The slot/function address of each device is encoded
58 * in a single byte as follows:
63 * PCI_DEVFN(), PCI_SLOT(), and PCI_FUNC() are defined in uapi/linux/pci.h.
64 * In the interest of not exposing interfaces to user-space unnecessarily,
65 * the following kernel-only defines are being added here.
67 #define PCI_DEVID(bus, devfn) ((((u16)(bus)) << 8) | (devfn))
68 /* return bus from PCI devid = ((u16)bus_number) << 8) | devfn */
69 #define PCI_BUS_NUM(x) (((x) >> 8) & 0xff)
71 /* pci_slot represents a physical slot */
73 struct pci_bus *bus; /* Bus this slot is on */
74 struct list_head list; /* Node in list of slots */
75 struct hotplug_slot *hotplug; /* Hotplug info (move here) */
76 unsigned char number; /* PCI_SLOT(pci_dev->devfn) */
80 static inline const char *pci_slot_name(const struct pci_slot *slot)
82 return kobject_name(&slot->kobj);
85 /* File state for mmap()s on /proc/bus/pci/X/Y */
91 /* For PCI devices, the region numbers are assigned this way: */
93 /* #0-5: standard PCI resources */
95 PCI_STD_RESOURCE_END = PCI_STD_RESOURCES + PCI_STD_NUM_BARS - 1,
97 /* #6: expansion ROM resource */
100 /* Device-specific resources */
101 #ifdef CONFIG_PCI_IOV
103 PCI_IOV_RESOURCE_END = PCI_IOV_RESOURCES + PCI_SRIOV_NUM_BARS - 1,
106 /* PCI-to-PCI (P2P) bridge windows */
107 #define PCI_BRIDGE_IO_WINDOW (PCI_BRIDGE_RESOURCES + 0)
108 #define PCI_BRIDGE_MEM_WINDOW (PCI_BRIDGE_RESOURCES + 1)
109 #define PCI_BRIDGE_PREF_MEM_WINDOW (PCI_BRIDGE_RESOURCES + 2)
111 /* CardBus bridge windows */
112 #define PCI_CB_BRIDGE_IO_0_WINDOW (PCI_BRIDGE_RESOURCES + 0)
113 #define PCI_CB_BRIDGE_IO_1_WINDOW (PCI_BRIDGE_RESOURCES + 1)
114 #define PCI_CB_BRIDGE_MEM_0_WINDOW (PCI_BRIDGE_RESOURCES + 2)
115 #define PCI_CB_BRIDGE_MEM_1_WINDOW (PCI_BRIDGE_RESOURCES + 3)
117 /* Total number of bridge resources for P2P and CardBus */
118 #define PCI_BRIDGE_RESOURCE_NUM 4
120 /* Resources assigned to buses behind the bridge */
121 PCI_BRIDGE_RESOURCES,
122 PCI_BRIDGE_RESOURCE_END = PCI_BRIDGE_RESOURCES +
123 PCI_BRIDGE_RESOURCE_NUM - 1,
125 /* Total resources associated with a PCI device */
128 /* Preserve this for compatibility */
129 DEVICE_COUNT_RESOURCE = PCI_NUM_RESOURCES,
133 * enum pci_interrupt_pin - PCI INTx interrupt values
134 * @PCI_INTERRUPT_UNKNOWN: Unknown or unassigned interrupt
135 * @PCI_INTERRUPT_INTA: PCI INTA pin
136 * @PCI_INTERRUPT_INTB: PCI INTB pin
137 * @PCI_INTERRUPT_INTC: PCI INTC pin
138 * @PCI_INTERRUPT_INTD: PCI INTD pin
140 * Corresponds to values for legacy PCI INTx interrupts, as can be found in the
141 * PCI_INTERRUPT_PIN register.
143 enum pci_interrupt_pin {
144 PCI_INTERRUPT_UNKNOWN,
151 /* The number of legacy PCI INTx interrupts */
152 #define PCI_NUM_INTX 4
155 * pci_power_t values must match the bits in the Capabilities PME_Support
156 * and Control/Status PowerState fields in the Power Management capability.
158 typedef int __bitwise pci_power_t;
160 #define PCI_D0 ((pci_power_t __force) 0)
161 #define PCI_D1 ((pci_power_t __force) 1)
162 #define PCI_D2 ((pci_power_t __force) 2)
163 #define PCI_D3hot ((pci_power_t __force) 3)
164 #define PCI_D3cold ((pci_power_t __force) 4)
165 #define PCI_UNKNOWN ((pci_power_t __force) 5)
166 #define PCI_POWER_ERROR ((pci_power_t __force) -1)
168 /* Remember to update this when the list above changes! */
169 extern const char *pci_power_names[];
171 static inline const char *pci_power_name(pci_power_t state)
173 return pci_power_names[1 + (__force int) state];
177 * typedef pci_channel_state_t
179 * The pci_channel state describes connectivity between the CPU and
180 * the PCI device. If some PCI bus between here and the PCI device
181 * has crashed or locked up, this info is reflected here.
183 typedef unsigned int __bitwise pci_channel_state_t;
186 /* I/O channel is in normal state */
187 pci_channel_io_normal = (__force pci_channel_state_t) 1,
189 /* I/O to channel is blocked */
190 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
192 /* PCI card is dead */
193 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
196 typedef unsigned int __bitwise pcie_reset_state_t;
198 enum pcie_reset_state {
199 /* Reset is NOT asserted (Use to deassert reset) */
200 pcie_deassert_reset = (__force pcie_reset_state_t) 1,
202 /* Use #PERST to reset PCIe device */
203 pcie_warm_reset = (__force pcie_reset_state_t) 2,
205 /* Use PCIe Hot Reset to reset device */
206 pcie_hot_reset = (__force pcie_reset_state_t) 3
209 typedef unsigned short __bitwise pci_dev_flags_t;
211 /* INTX_DISABLE in PCI_COMMAND register disables MSI too */
212 PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) (1 << 0),
213 /* Device configuration is irrevocably lost if disabled into D3 */
214 PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) (1 << 1),
215 /* Provide indication device is assigned by a Virtual Machine Manager */
216 PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) (1 << 2),
217 /* Flag for quirk use to store if quirk-specific ACS is enabled */
218 PCI_DEV_FLAGS_ACS_ENABLED_QUIRK = (__force pci_dev_flags_t) (1 << 3),
219 /* Use a PCIe-to-PCI bridge alias even if !pci_is_pcie */
220 PCI_DEV_FLAG_PCIE_BRIDGE_ALIAS = (__force pci_dev_flags_t) (1 << 5),
221 /* Do not use bus resets for device */
222 PCI_DEV_FLAGS_NO_BUS_RESET = (__force pci_dev_flags_t) (1 << 6),
223 /* Do not use PM reset even if device advertises NoSoftRst- */
224 PCI_DEV_FLAGS_NO_PM_RESET = (__force pci_dev_flags_t) (1 << 7),
225 /* Get VPD from function 0 VPD */
226 PCI_DEV_FLAGS_VPD_REF_F0 = (__force pci_dev_flags_t) (1 << 8),
227 /* A non-root bridge where translation occurs, stop alias search here */
228 PCI_DEV_FLAGS_BRIDGE_XLATE_ROOT = (__force pci_dev_flags_t) (1 << 9),
229 /* Do not use FLR even if device advertises PCI_AF_CAP */
230 PCI_DEV_FLAGS_NO_FLR_RESET = (__force pci_dev_flags_t) (1 << 10),
231 /* Don't use Relaxed Ordering for TLPs directed at this device */
232 PCI_DEV_FLAGS_NO_RELAXED_ORDERING = (__force pci_dev_flags_t) (1 << 11),
235 enum pci_irq_reroute_variant {
236 INTEL_IRQ_REROUTE_VARIANT = 1,
237 MAX_IRQ_REROUTE_VARIANTS = 3
240 typedef unsigned short __bitwise pci_bus_flags_t;
242 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
243 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
244 PCI_BUS_FLAGS_NO_AERSID = (__force pci_bus_flags_t) 4,
245 PCI_BUS_FLAGS_NO_EXTCFG = (__force pci_bus_flags_t) 8,
248 /* Values from Link Status register, PCIe r3.1, sec 7.8.8 */
249 enum pcie_link_width {
250 PCIE_LNK_WIDTH_RESRV = 0x00,
258 PCIE_LNK_WIDTH_UNKNOWN = 0xff,
261 /* See matching string table in pci_speed_string() */
263 PCI_SPEED_33MHz = 0x00,
264 PCI_SPEED_66MHz = 0x01,
265 PCI_SPEED_66MHz_PCIX = 0x02,
266 PCI_SPEED_100MHz_PCIX = 0x03,
267 PCI_SPEED_133MHz_PCIX = 0x04,
268 PCI_SPEED_66MHz_PCIX_ECC = 0x05,
269 PCI_SPEED_100MHz_PCIX_ECC = 0x06,
270 PCI_SPEED_133MHz_PCIX_ECC = 0x07,
271 PCI_SPEED_66MHz_PCIX_266 = 0x09,
272 PCI_SPEED_100MHz_PCIX_266 = 0x0a,
273 PCI_SPEED_133MHz_PCIX_266 = 0x0b,
279 PCI_SPEED_66MHz_PCIX_533 = 0x11,
280 PCI_SPEED_100MHz_PCIX_533 = 0x12,
281 PCI_SPEED_133MHz_PCIX_533 = 0x13,
282 PCIE_SPEED_2_5GT = 0x14,
283 PCIE_SPEED_5_0GT = 0x15,
284 PCIE_SPEED_8_0GT = 0x16,
285 PCIE_SPEED_16_0GT = 0x17,
286 PCIE_SPEED_32_0GT = 0x18,
287 PCIE_SPEED_64_0GT = 0x19,
288 PCI_SPEED_UNKNOWN = 0xff,
291 enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev);
292 enum pcie_link_width pcie_get_width_cap(struct pci_dev *dev);
294 struct pci_cap_saved_data {
301 struct pci_cap_saved_state {
302 struct hlist_node next;
303 struct pci_cap_saved_data cap;
307 struct pcie_link_state;
313 /* The pci_dev structure describes PCI devices */
315 struct list_head bus_list; /* Node in per-bus list */
316 struct pci_bus *bus; /* Bus this device is on */
317 struct pci_bus *subordinate; /* Bus this device bridges to */
319 void *sysdata; /* Hook for sys-specific extension */
320 struct proc_dir_entry *procent; /* Device entry in /proc/bus/pci */
321 struct pci_slot *slot; /* Physical slot this device is in */
323 unsigned int devfn; /* Encoded device & function index */
324 unsigned short vendor;
325 unsigned short device;
326 unsigned short subsystem_vendor;
327 unsigned short subsystem_device;
328 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
329 u8 revision; /* PCI revision, low byte of class word */
330 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
331 #ifdef CONFIG_PCIEAER
332 u16 aer_cap; /* AER capability offset */
333 struct aer_stats *aer_stats; /* AER stats for this device */
335 #ifdef CONFIG_PCIEPORTBUS
336 struct rcec_ea *rcec_ea; /* RCEC cached endpoint association */
337 struct pci_dev *rcec; /* Associated RCEC device */
339 u32 devcap; /* PCIe Device Capabilities */
340 u8 pcie_cap; /* PCIe capability offset */
341 u8 msi_cap; /* MSI capability offset */
342 u8 msix_cap; /* MSI-X capability offset */
343 u8 pcie_mpss:3; /* PCIe Max Payload Size Supported */
344 u8 rom_base_reg; /* Config register controlling ROM */
345 u8 pin; /* Interrupt pin this device uses */
346 u16 pcie_flags_reg; /* Cached PCIe Capabilities Register */
347 unsigned long *dma_alias_mask;/* Mask of enabled devfn aliases */
349 struct pci_driver *driver; /* Driver bound to this device */
350 u64 dma_mask; /* Mask of the bits of bus address this
351 device implements. Normally this is
352 0xffffffff. You only need to change
353 this if your device has broken DMA
354 or supports 64-bit transfers. */
356 struct device_dma_parameters dma_parms;
358 pci_power_t current_state; /* Current operating state. In ACPI,
359 this is D0-D3, D0 being fully
360 functional, and D3 being off. */
361 unsigned int imm_ready:1; /* Supports Immediate Readiness */
362 u8 pm_cap; /* PM capability offset */
363 unsigned int pme_support:5; /* Bitmask of states from which PME#
365 unsigned int pme_poll:1; /* Poll device's PME status bit */
366 unsigned int d1_support:1; /* Low power state D1 is supported */
367 unsigned int d2_support:1; /* Low power state D2 is supported */
368 unsigned int no_d1d2:1; /* D1 and D2 are forbidden */
369 unsigned int no_d3cold:1; /* D3cold is forbidden */
370 unsigned int bridge_d3:1; /* Allow D3 for bridge */
371 unsigned int d3cold_allowed:1; /* D3cold is allowed by user */
372 unsigned int mmio_always_on:1; /* Disallow turning off io/mem
373 decoding during BAR sizing */
374 unsigned int wakeup_prepared:1;
375 unsigned int runtime_d3cold:1; /* Whether go through runtime
376 D3cold, not set for devices
377 powered on/off by the
378 corresponding bridge */
379 unsigned int skip_bus_pm:1; /* Internal: Skip bus-level PM */
380 unsigned int ignore_hotplug:1; /* Ignore hotplug events */
381 unsigned int hotplug_user_indicators:1; /* SlotCtl indicators
382 controlled exclusively by
384 unsigned int clear_retrain_link:1; /* Need to clear Retrain Link
386 unsigned int d3hot_delay; /* D3hot->D0 transition time in ms */
387 unsigned int d3cold_delay; /* D3cold->D0 transition time in ms */
389 #ifdef CONFIG_PCIEASPM
390 struct pcie_link_state *link_state; /* ASPM link state */
391 unsigned int ltr_path:1; /* Latency Tolerance Reporting
392 supported from root to here */
393 u16 l1ss; /* L1SS Capability pointer */
395 unsigned int eetlp_prefix_path:1; /* End-to-End TLP Prefix */
397 pci_channel_state_t error_state; /* Current connectivity state */
398 struct device dev; /* Generic device interface */
400 int cfg_size; /* Size of config space */
403 * Instead of touching interrupt line and base address registers
404 * directly, use the values stored here. They might be different!
407 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
409 bool match_driver; /* Skip attaching driver */
411 unsigned int transparent:1; /* Subtractive decode bridge */
412 unsigned int io_window:1; /* Bridge has I/O window */
413 unsigned int pref_window:1; /* Bridge has pref mem window */
414 unsigned int pref_64_window:1; /* Pref mem window is 64-bit */
415 unsigned int multifunction:1; /* Multi-function device */
417 unsigned int is_busmaster:1; /* Is busmaster */
418 unsigned int no_msi:1; /* May not use MSI */
419 unsigned int no_64bit_msi:1; /* May only use 32-bit MSIs */
420 unsigned int block_cfg_access:1; /* Config space access blocked */
421 unsigned int broken_parity_status:1; /* Generates false positive parity */
422 unsigned int irq_reroute_variant:2; /* Needs IRQ rerouting variant */
423 unsigned int msi_enabled:1;
424 unsigned int msix_enabled:1;
425 unsigned int ari_enabled:1; /* ARI forwarding */
426 unsigned int ats_enabled:1; /* Address Translation Svc */
427 unsigned int pasid_enabled:1; /* Process Address Space ID */
428 unsigned int pri_enabled:1; /* Page Request Interface */
429 unsigned int is_managed:1;
430 unsigned int needs_freset:1; /* Requires fundamental reset */
431 unsigned int state_saved:1;
432 unsigned int is_physfn:1;
433 unsigned int is_virtfn:1;
434 unsigned int reset_fn:1;
435 unsigned int is_hotplug_bridge:1;
436 unsigned int shpc_managed:1; /* SHPC owned by shpchp */
437 unsigned int is_thunderbolt:1; /* Thunderbolt controller */
439 * Devices marked being untrusted are the ones that can potentially
440 * execute DMA attacks and similar. They are typically connected
441 * through external ports such as Thunderbolt but not limited to
442 * that. When an IOMMU is enabled they should be getting full
443 * mappings to make sure they cannot access arbitrary memory.
445 unsigned int untrusted:1;
447 * Info from the platform, e.g., ACPI or device tree, may mark a
448 * device as "external-facing". An external-facing device is
449 * itself internal but devices downstream from it are external.
451 unsigned int external_facing:1;
452 unsigned int broken_intx_masking:1; /* INTx masking can't be used */
453 unsigned int io_window_1k:1; /* Intel bridge 1K I/O windows */
454 unsigned int irq_managed:1;
455 unsigned int non_compliant_bars:1; /* Broken BARs; ignore them */
456 unsigned int is_probed:1; /* Device probing in progress */
457 unsigned int link_active_reporting:1;/* Device capable of reporting link active */
458 unsigned int no_vf_scan:1; /* Don't scan for VFs after IOV enablement */
459 unsigned int no_command_memory:1; /* No PCI_COMMAND_MEMORY */
460 pci_dev_flags_t dev_flags;
461 atomic_t enable_cnt; /* pci_enable_device has been called */
463 u32 saved_config_space[16]; /* Config space saved at suspend time */
464 struct hlist_head saved_cap_space;
465 int rom_attr_enabled; /* Display of ROM attribute enabled? */
466 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
467 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
469 #ifdef CONFIG_HOTPLUG_PCI_PCIE
470 unsigned int broken_cmd_compl:1; /* No compl for some cmds */
472 #ifdef CONFIG_PCIE_PTM
473 unsigned int ptm_root:1;
474 unsigned int ptm_enabled:1;
477 #ifdef CONFIG_PCI_MSI
478 const struct attribute_group **msi_irq_groups;
481 #ifdef CONFIG_PCIE_DPC
483 unsigned int dpc_rp_extensions:1;
486 #ifdef CONFIG_PCI_ATS
488 struct pci_sriov *sriov; /* PF: SR-IOV info */
489 struct pci_dev *physfn; /* VF: related PF */
491 u16 ats_cap; /* ATS Capability offset */
492 u8 ats_stu; /* ATS Smallest Translation Unit */
494 #ifdef CONFIG_PCI_PRI
495 u16 pri_cap; /* PRI Capability offset */
496 u32 pri_reqs_alloc; /* Number of PRI requests allocated */
497 unsigned int pasid_required:1; /* PRG Response PASID Required */
499 #ifdef CONFIG_PCI_PASID
500 u16 pasid_cap; /* PASID Capability offset */
503 #ifdef CONFIG_PCI_P2PDMA
504 struct pci_p2pdma __rcu *p2pdma;
506 u16 acs_cap; /* ACS Capability offset */
507 phys_addr_t rom; /* Physical address if not from BAR */
508 size_t romlen; /* Length if not from BAR */
509 char *driver_override; /* Driver name to force a match */
511 unsigned long priv_flags; /* Private flags for the PCI driver */
513 /* These methods index pci_reset_fn_methods[] */
514 u8 reset_methods[PCI_NUM_RESET_METHODS]; /* In priority order */
517 static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
519 #ifdef CONFIG_PCI_IOV
526 struct pci_dev *pci_alloc_dev(struct pci_bus *bus);
528 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
529 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
531 static inline int pci_channel_offline(struct pci_dev *pdev)
533 return (pdev->error_state != pci_channel_io_normal);
536 struct pci_host_bridge {
538 struct pci_bus *bus; /* Root bus */
540 struct pci_ops *child_ops;
543 struct list_head windows; /* resource_entry */
544 struct list_head dma_ranges; /* dma ranges resource list */
545 u8 (*swizzle_irq)(struct pci_dev *, u8 *); /* Platform IRQ swizzler */
546 int (*map_irq)(const struct pci_dev *, u8, u8);
547 void (*release_fn)(struct pci_host_bridge *);
549 unsigned int ignore_reset_delay:1; /* For entire hierarchy */
550 unsigned int no_ext_tags:1; /* No Extended Tags */
551 unsigned int native_aer:1; /* OS may use PCIe AER */
552 unsigned int native_pcie_hotplug:1; /* OS may use PCIe hotplug */
553 unsigned int native_shpc_hotplug:1; /* OS may use SHPC hotplug */
554 unsigned int native_pme:1; /* OS may use PCIe PME */
555 unsigned int native_ltr:1; /* OS may use PCIe LTR */
556 unsigned int native_dpc:1; /* OS may use PCIe DPC */
557 unsigned int preserve_config:1; /* Preserve FW resource setup */
558 unsigned int size_windows:1; /* Enable root bus sizing */
559 unsigned int msi_domain:1; /* Bridge wants MSI domain */
561 /* Resource alignment requirements */
562 resource_size_t (*align_resource)(struct pci_dev *dev,
563 const struct resource *res,
564 resource_size_t start,
565 resource_size_t size,
566 resource_size_t align);
567 unsigned long private[] ____cacheline_aligned;
570 #define to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev)
572 static inline void *pci_host_bridge_priv(struct pci_host_bridge *bridge)
574 return (void *)bridge->private;
577 static inline struct pci_host_bridge *pci_host_bridge_from_priv(void *priv)
579 return container_of(priv, struct pci_host_bridge, private);
582 struct pci_host_bridge *pci_alloc_host_bridge(size_t priv);
583 struct pci_host_bridge *devm_pci_alloc_host_bridge(struct device *dev,
585 void pci_free_host_bridge(struct pci_host_bridge *bridge);
586 struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus);
588 void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
589 void (*release_fn)(struct pci_host_bridge *),
592 int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge);
595 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
596 * to P2P or CardBus bridge windows) go in a table. Additional ones (for
597 * buses below host bridges or subtractive decode bridges) go in the list.
598 * Use pci_bus_for_each_resource() to iterate through all the resources.
602 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly
603 * and there's no way to program the bridge with the details of the window.
604 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive-
605 * decode bit set, because they are explicit and can be programmed with _SRS.
607 #define PCI_SUBTRACTIVE_DECODE 0x1
609 struct pci_bus_resource {
610 struct list_head list;
611 struct resource *res;
615 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
618 struct list_head node; /* Node in list of buses */
619 struct pci_bus *parent; /* Parent bus this bridge is on */
620 struct list_head children; /* List of child buses */
621 struct list_head devices; /* List of devices on this bus */
622 struct pci_dev *self; /* Bridge device as seen by parent */
623 struct list_head slots; /* List of slots on this bus;
624 protected by pci_slot_mutex */
625 struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
626 struct list_head resources; /* Address space routed to this bus */
627 struct resource busn_res; /* Bus numbers routed to this bus */
629 struct pci_ops *ops; /* Configuration access functions */
630 void *sysdata; /* Hook for sys-specific extension */
631 struct proc_dir_entry *procdir; /* Directory entry in /proc/bus/pci */
633 unsigned char number; /* Bus number */
634 unsigned char primary; /* Number of primary bridge */
635 unsigned char max_bus_speed; /* enum pci_bus_speed */
636 unsigned char cur_bus_speed; /* enum pci_bus_speed */
637 #ifdef CONFIG_PCI_DOMAINS_GENERIC
643 unsigned short bridge_ctl; /* Manage NO_ISA/FBB/et al behaviors */
644 pci_bus_flags_t bus_flags; /* Inherited by child buses */
645 struct device *bridge;
647 struct bin_attribute *legacy_io; /* Legacy I/O for this bus */
648 struct bin_attribute *legacy_mem; /* Legacy mem */
649 unsigned int is_added:1;
652 #define to_pci_bus(n) container_of(n, struct pci_bus, dev)
654 static inline u16 pci_dev_id(struct pci_dev *dev)
656 return PCI_DEVID(dev->bus->number, dev->devfn);
660 * Returns true if the PCI bus is root (behind host-PCI bridge),
663 * Some code assumes that "bus->self == NULL" means that bus is a root bus.
664 * This is incorrect because "virtual" buses added for SR-IOV (via
665 * virtfn_add_bus()) have "bus->self == NULL" but are not root buses.
667 static inline bool pci_is_root_bus(struct pci_bus *pbus)
669 return !(pbus->parent);
673 * pci_is_bridge - check if the PCI device is a bridge
676 * Return true if the PCI device is bridge whether it has subordinate
679 static inline bool pci_is_bridge(struct pci_dev *dev)
681 return dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
682 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS;
685 #define for_each_pci_bridge(dev, bus) \
686 list_for_each_entry(dev, &bus->devices, bus_list) \
687 if (!pci_is_bridge(dev)) {} else
689 static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev)
691 dev = pci_physfn(dev);
692 if (pci_is_root_bus(dev->bus))
695 return dev->bus->self;
698 #ifdef CONFIG_PCI_MSI
699 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
701 return pci_dev->msi_enabled || pci_dev->msix_enabled;
704 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
707 /* Error values that may be returned by PCI functions */
708 #define PCIBIOS_SUCCESSFUL 0x00
709 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
710 #define PCIBIOS_BAD_VENDOR_ID 0x83
711 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
712 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
713 #define PCIBIOS_SET_FAILED 0x88
714 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
716 /* Translate above to generic errno for passing back through non-PCI code */
717 static inline int pcibios_err_to_errno(int err)
719 if (err <= PCIBIOS_SUCCESSFUL)
720 return err; /* Assume already errno */
723 case PCIBIOS_FUNC_NOT_SUPPORTED:
725 case PCIBIOS_BAD_VENDOR_ID:
727 case PCIBIOS_DEVICE_NOT_FOUND:
729 case PCIBIOS_BAD_REGISTER_NUMBER:
731 case PCIBIOS_SET_FAILED:
733 case PCIBIOS_BUFFER_TOO_SMALL:
740 /* Low-level architecture-dependent routines */
743 int (*add_bus)(struct pci_bus *bus);
744 void (*remove_bus)(struct pci_bus *bus);
745 void __iomem *(*map_bus)(struct pci_bus *bus, unsigned int devfn, int where);
746 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
747 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
751 * ACPI needs to be able to access PCI config space before we've done a
752 * PCI bus scan and created pci_bus structures.
754 int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
755 int reg, int len, u32 *val);
756 int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
757 int reg, int len, u32 val);
759 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
760 typedef u64 pci_bus_addr_t;
762 typedef u32 pci_bus_addr_t;
765 struct pci_bus_region {
766 pci_bus_addr_t start;
771 spinlock_t lock; /* Protects list, index */
772 struct list_head list; /* For IDs added at runtime */
777 * PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
778 * a set of callbacks in struct pci_error_handlers, that device driver
779 * will be notified of PCI bus errors, and will be driven to recovery
780 * when an error occurs.
783 typedef unsigned int __bitwise pci_ers_result_t;
785 enum pci_ers_result {
786 /* No result/none/not supported in device driver */
787 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
789 /* Device driver can recover without slot reset */
790 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
792 /* Device driver wants slot to be reset */
793 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
795 /* Device has completely failed, is unrecoverable */
796 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
798 /* Device driver is fully recovered and operational */
799 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
801 /* No AER capabilities registered for the driver */
802 PCI_ERS_RESULT_NO_AER_DRIVER = (__force pci_ers_result_t) 6,
805 /* PCI bus error event callbacks */
806 struct pci_error_handlers {
807 /* PCI bus error detected on this device */
808 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
809 pci_channel_state_t error);
811 /* MMIO has been re-enabled, but not DMA */
812 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
814 /* PCI slot has been reset */
815 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
817 /* PCI function reset prepare or completed */
818 void (*reset_prepare)(struct pci_dev *dev);
819 void (*reset_done)(struct pci_dev *dev);
821 /* Device driver may resume normal operations */
822 void (*resume)(struct pci_dev *dev);
829 * struct pci_driver - PCI driver structure
830 * @node: List of driver structures.
831 * @name: Driver name.
832 * @id_table: Pointer to table of device IDs the driver is
833 * interested in. Most drivers should export this
834 * table using MODULE_DEVICE_TABLE(pci,...).
835 * @probe: This probing function gets called (during execution
836 * of pci_register_driver() for already existing
837 * devices or later if a new device gets inserted) for
838 * all PCI devices which match the ID table and are not
839 * "owned" by the other drivers yet. This function gets
840 * passed a "struct pci_dev \*" for each device whose
841 * entry in the ID table matches the device. The probe
842 * function returns zero when the driver chooses to
843 * take "ownership" of the device or an error code
844 * (negative number) otherwise.
845 * The probe function always gets called from process
846 * context, so it can sleep.
847 * @remove: The remove() function gets called whenever a device
848 * being handled by this driver is removed (either during
849 * deregistration of the driver or when it's manually
850 * pulled out of a hot-pluggable slot).
851 * The remove function always gets called from process
852 * context, so it can sleep.
853 * @suspend: Put device into low power state.
854 * @resume: Wake device from low power state.
855 * (Please see Documentation/power/pci.rst for descriptions
856 * of PCI Power Management and the related functions.)
857 * @shutdown: Hook into reboot_notifier_list (kernel/sys.c).
858 * Intended to stop any idling DMA operations.
859 * Useful for enabling wake-on-lan (NIC) or changing
860 * the power state of a device before reboot.
861 * e.g. drivers/net/e100.c.
862 * @sriov_configure: Optional driver callback to allow configuration of
863 * number of VFs to enable via sysfs "sriov_numvfs" file.
864 * @sriov_set_msix_vec_count: PF Driver callback to change number of MSI-X
865 * vectors on a VF. Triggered via sysfs "sriov_vf_msix_count".
866 * This will change MSI-X Table Size in the VF Message Control
868 * @sriov_get_vf_total_msix: PF driver callback to get the total number of
869 * MSI-X vectors available for distribution to the VFs.
870 * @err_handler: See Documentation/PCI/pci-error-recovery.rst
871 * @groups: Sysfs attribute groups.
872 * @dev_groups: Attributes attached to the device that will be
873 * created once it is bound to the driver.
874 * @driver: Driver model structure.
875 * @dynids: List of dynamically added device IDs.
878 struct list_head node;
880 const struct pci_device_id *id_table; /* Must be non-NULL for probe to be called */
881 int (*probe)(struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
882 void (*remove)(struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
883 int (*suspend)(struct pci_dev *dev, pm_message_t state); /* Device suspended */
884 int (*resume)(struct pci_dev *dev); /* Device woken up */
885 void (*shutdown)(struct pci_dev *dev);
886 int (*sriov_configure)(struct pci_dev *dev, int num_vfs); /* On PF */
887 int (*sriov_set_msix_vec_count)(struct pci_dev *vf, int msix_vec_count); /* On PF */
888 u32 (*sriov_get_vf_total_msix)(struct pci_dev *pf);
889 const struct pci_error_handlers *err_handler;
890 const struct attribute_group **groups;
891 const struct attribute_group **dev_groups;
892 struct device_driver driver;
893 struct pci_dynids dynids;
896 #define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
899 * PCI_DEVICE - macro used to describe a specific PCI device
900 * @vend: the 16 bit PCI Vendor ID
901 * @dev: the 16 bit PCI Device ID
903 * This macro is used to create a struct pci_device_id that matches a
904 * specific device. The subvendor and subdevice fields will be set to
907 #define PCI_DEVICE(vend,dev) \
908 .vendor = (vend), .device = (dev), \
909 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
912 * PCI_DEVICE_SUB - macro used to describe a specific PCI device with subsystem
913 * @vend: the 16 bit PCI Vendor ID
914 * @dev: the 16 bit PCI Device ID
915 * @subvend: the 16 bit PCI Subvendor ID
916 * @subdev: the 16 bit PCI Subdevice ID
918 * This macro is used to create a struct pci_device_id that matches a
919 * specific device with subsystem information.
921 #define PCI_DEVICE_SUB(vend, dev, subvend, subdev) \
922 .vendor = (vend), .device = (dev), \
923 .subvendor = (subvend), .subdevice = (subdev)
926 * PCI_DEVICE_CLASS - macro used to describe a specific PCI device class
927 * @dev_class: the class, subclass, prog-if triple for this device
928 * @dev_class_mask: the class mask for this device
930 * This macro is used to create a struct pci_device_id that matches a
931 * specific PCI class. The vendor, device, subvendor, and subdevice
932 * fields will be set to PCI_ANY_ID.
934 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
935 .class = (dev_class), .class_mask = (dev_class_mask), \
936 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
937 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
940 * PCI_VDEVICE - macro used to describe a specific PCI device in short form
941 * @vend: the vendor name
942 * @dev: the 16 bit PCI Device ID
944 * This macro is used to create a struct pci_device_id that matches a
945 * specific PCI device. The subvendor, and subdevice fields will be set
946 * to PCI_ANY_ID. The macro allows the next field to follow as the device
949 #define PCI_VDEVICE(vend, dev) \
950 .vendor = PCI_VENDOR_ID_##vend, .device = (dev), \
951 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0
954 * PCI_DEVICE_DATA - macro used to describe a specific PCI device in very short form
955 * @vend: the vendor name (without PCI_VENDOR_ID_ prefix)
956 * @dev: the device name (without PCI_DEVICE_ID_<vend>_ prefix)
957 * @data: the driver data to be filled
959 * This macro is used to create a struct pci_device_id that matches a
960 * specific PCI device. The subvendor, and subdevice fields will be set
963 #define PCI_DEVICE_DATA(vend, dev, data) \
964 .vendor = PCI_VENDOR_ID_##vend, .device = PCI_DEVICE_ID_##vend##_##dev, \
965 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0, \
966 .driver_data = (kernel_ulong_t)(data)
969 PCI_REASSIGN_ALL_RSRC = 0x00000001, /* Ignore firmware setup */
970 PCI_REASSIGN_ALL_BUS = 0x00000002, /* Reassign all bus numbers */
971 PCI_PROBE_ONLY = 0x00000004, /* Use existing setup */
972 PCI_CAN_SKIP_ISA_ALIGN = 0x00000008, /* Don't do ISA alignment */
973 PCI_ENABLE_PROC_DOMAINS = 0x00000010, /* Enable domains in /proc */
974 PCI_COMPAT_DOMAIN_0 = 0x00000020, /* ... except domain 0 */
975 PCI_SCAN_ALL_PCIE_DEVS = 0x00000040, /* Scan all, not just dev 0 */
978 #define PCI_IRQ_LEGACY (1 << 0) /* Allow legacy interrupts */
979 #define PCI_IRQ_MSI (1 << 1) /* Allow MSI interrupts */
980 #define PCI_IRQ_MSIX (1 << 2) /* Allow MSI-X interrupts */
981 #define PCI_IRQ_AFFINITY (1 << 3) /* Auto-assign affinity */
983 /* These external functions are only available when PCI support is enabled */
986 extern unsigned int pci_flags;
988 static inline void pci_set_flags(int flags) { pci_flags = flags; }
989 static inline void pci_add_flags(int flags) { pci_flags |= flags; }
990 static inline void pci_clear_flags(int flags) { pci_flags &= ~flags; }
991 static inline int pci_has_flag(int flag) { return pci_flags & flag; }
993 void pcie_bus_configure_settings(struct pci_bus *bus);
995 enum pcie_bus_config_types {
996 PCIE_BUS_TUNE_OFF, /* Don't touch MPS at all */
997 PCIE_BUS_DEFAULT, /* Ensure MPS matches upstream bridge */
998 PCIE_BUS_SAFE, /* Use largest MPS boot-time devices support */
999 PCIE_BUS_PERFORMANCE, /* Use MPS and MRRS for best performance */
1000 PCIE_BUS_PEER2PEER, /* Set MPS = 128 for all devices */
1003 extern enum pcie_bus_config_types pcie_bus_config;
1005 extern struct bus_type pci_bus_type;
1007 /* Do NOT directly access these two variables, unless you are arch-specific PCI
1008 * code, or PCI core code. */
1009 extern struct list_head pci_root_buses; /* List of all known PCI buses */
1010 /* Some device drivers need know if PCI is initiated */
1011 int no_pci_devices(void);
1013 void pcibios_resource_survey_bus(struct pci_bus *bus);
1014 void pcibios_bus_add_device(struct pci_dev *pdev);
1015 void pcibios_add_bus(struct pci_bus *bus);
1016 void pcibios_remove_bus(struct pci_bus *bus);
1017 void pcibios_fixup_bus(struct pci_bus *);
1018 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
1019 /* Architecture-specific versions may override this (weak) */
1020 char *pcibios_setup(char *str);
1022 /* Used only when drivers/pci/setup.c is used */
1023 resource_size_t pcibios_align_resource(void *, const struct resource *,
1027 /* Weak but can be overridden by arch */
1028 void pci_fixup_cardbus(struct pci_bus *);
1030 /* Generic PCI functions used internally */
1032 void pcibios_resource_to_bus(struct pci_bus *bus, struct pci_bus_region *region,
1033 struct resource *res);
1034 void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
1035 struct pci_bus_region *region);
1036 void pcibios_scan_specific_bus(int busn);
1037 struct pci_bus *pci_find_bus(int domain, int busnr);
1038 void pci_bus_add_devices(const struct pci_bus *bus);
1039 struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
1040 struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
1041 struct pci_ops *ops, void *sysdata,
1042 struct list_head *resources);
1043 int pci_host_probe(struct pci_host_bridge *bridge);
1044 int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
1045 int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax);
1046 void pci_bus_release_busn_res(struct pci_bus *b);
1047 struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
1048 struct pci_ops *ops, void *sysdata,
1049 struct list_head *resources);
1050 int pci_scan_root_bus_bridge(struct pci_host_bridge *bridge);
1051 struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
1053 struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
1055 struct hotplug_slot *hotplug);
1056 void pci_destroy_slot(struct pci_slot *slot);
1058 void pci_dev_assign_slot(struct pci_dev *dev);
1060 static inline void pci_dev_assign_slot(struct pci_dev *dev) { }
1062 int pci_scan_slot(struct pci_bus *bus, int devfn);
1063 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
1064 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
1065 unsigned int pci_scan_child_bus(struct pci_bus *bus);
1066 void pci_bus_add_device(struct pci_dev *dev);
1067 void pci_read_bridge_bases(struct pci_bus *child);
1068 struct resource *pci_find_parent_resource(const struct pci_dev *dev,
1069 struct resource *res);
1070 u8 pci_swizzle_interrupt_pin(const struct pci_dev *dev, u8 pin);
1071 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
1072 u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
1073 struct pci_dev *pci_dev_get(struct pci_dev *dev);
1074 void pci_dev_put(struct pci_dev *dev);
1075 void pci_remove_bus(struct pci_bus *b);
1076 void pci_stop_and_remove_bus_device(struct pci_dev *dev);
1077 void pci_stop_and_remove_bus_device_locked(struct pci_dev *dev);
1078 void pci_stop_root_bus(struct pci_bus *bus);
1079 void pci_remove_root_bus(struct pci_bus *bus);
1080 void pci_setup_cardbus(struct pci_bus *bus);
1081 void pcibios_setup_bridge(struct pci_bus *bus, unsigned long type);
1082 void pci_sort_breadthfirst(void);
1083 #define dev_is_pci(d) ((d)->bus == &pci_bus_type)
1084 #define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false))
1086 /* Generic PCI functions exported to card drivers */
1088 u8 pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
1089 u8 pci_find_capability(struct pci_dev *dev, int cap);
1090 u8 pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
1091 u8 pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
1092 u8 pci_find_next_ht_capability(struct pci_dev *dev, u8 pos, int ht_cap);
1093 u16 pci_find_ext_capability(struct pci_dev *dev, int cap);
1094 u16 pci_find_next_ext_capability(struct pci_dev *dev, u16 pos, int cap);
1095 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
1096 u16 pci_find_vsec_capability(struct pci_dev *dev, u16 vendor, int cap);
1098 u64 pci_get_dsn(struct pci_dev *dev);
1100 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
1101 struct pci_dev *from);
1102 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
1103 unsigned int ss_vendor, unsigned int ss_device,
1104 struct pci_dev *from);
1105 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
1106 struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
1107 unsigned int devfn);
1108 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
1109 int pci_dev_present(const struct pci_device_id *ids);
1111 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
1112 int where, u8 *val);
1113 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
1114 int where, u16 *val);
1115 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
1116 int where, u32 *val);
1117 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
1119 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
1120 int where, u16 val);
1121 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
1122 int where, u32 val);
1124 int pci_generic_config_read(struct pci_bus *bus, unsigned int devfn,
1125 int where, int size, u32 *val);
1126 int pci_generic_config_write(struct pci_bus *bus, unsigned int devfn,
1127 int where, int size, u32 val);
1128 int pci_generic_config_read32(struct pci_bus *bus, unsigned int devfn,
1129 int where, int size, u32 *val);
1130 int pci_generic_config_write32(struct pci_bus *bus, unsigned int devfn,
1131 int where, int size, u32 val);
1133 struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
1135 int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val);
1136 int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val);
1137 int pci_read_config_dword(const struct pci_dev *dev, int where, u32 *val);
1138 int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val);
1139 int pci_write_config_word(const struct pci_dev *dev, int where, u16 val);
1140 int pci_write_config_dword(const struct pci_dev *dev, int where, u32 val);
1142 int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val);
1143 int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val);
1144 int pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val);
1145 int pcie_capability_write_dword(struct pci_dev *dev, int pos, u32 val);
1146 int pcie_capability_clear_and_set_word(struct pci_dev *dev, int pos,
1147 u16 clear, u16 set);
1148 int pcie_capability_clear_and_set_dword(struct pci_dev *dev, int pos,
1149 u32 clear, u32 set);
1151 static inline int pcie_capability_set_word(struct pci_dev *dev, int pos,
1154 return pcie_capability_clear_and_set_word(dev, pos, 0, set);
1157 static inline int pcie_capability_set_dword(struct pci_dev *dev, int pos,
1160 return pcie_capability_clear_and_set_dword(dev, pos, 0, set);
1163 static inline int pcie_capability_clear_word(struct pci_dev *dev, int pos,
1166 return pcie_capability_clear_and_set_word(dev, pos, clear, 0);
1169 static inline int pcie_capability_clear_dword(struct pci_dev *dev, int pos,
1172 return pcie_capability_clear_and_set_dword(dev, pos, clear, 0);
1175 /* User-space driven config access */
1176 int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
1177 int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
1178 int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val);
1179 int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val);
1180 int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val);
1181 int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val);
1183 int __must_check pci_enable_device(struct pci_dev *dev);
1184 int __must_check pci_enable_device_io(struct pci_dev *dev);
1185 int __must_check pci_enable_device_mem(struct pci_dev *dev);
1186 int __must_check pci_reenable_device(struct pci_dev *);
1187 int __must_check pcim_enable_device(struct pci_dev *pdev);
1188 void pcim_pin_device(struct pci_dev *pdev);
1190 static inline bool pci_intx_mask_supported(struct pci_dev *pdev)
1193 * INTx masking is supported if PCI_COMMAND_INTX_DISABLE is
1194 * writable and no quirk has marked the feature broken.
1196 return !pdev->broken_intx_masking;
1199 static inline int pci_is_enabled(struct pci_dev *pdev)
1201 return (atomic_read(&pdev->enable_cnt) > 0);
1204 static inline int pci_is_managed(struct pci_dev *pdev)
1206 return pdev->is_managed;
1209 void pci_disable_device(struct pci_dev *dev);
1211 extern unsigned int pcibios_max_latency;
1212 void pci_set_master(struct pci_dev *dev);
1213 void pci_clear_master(struct pci_dev *dev);
1215 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
1216 int pci_set_cacheline_size(struct pci_dev *dev);
1217 int __must_check pci_set_mwi(struct pci_dev *dev);
1218 int __must_check pcim_set_mwi(struct pci_dev *dev);
1219 int pci_try_set_mwi(struct pci_dev *dev);
1220 void pci_clear_mwi(struct pci_dev *dev);
1221 void pci_disable_parity(struct pci_dev *dev);
1222 void pci_intx(struct pci_dev *dev, int enable);
1223 bool pci_check_and_mask_intx(struct pci_dev *dev);
1224 bool pci_check_and_unmask_intx(struct pci_dev *dev);
1225 int pci_wait_for_pending(struct pci_dev *dev, int pos, u16 mask);
1226 int pci_wait_for_pending_transaction(struct pci_dev *dev);
1227 int pcix_get_max_mmrbc(struct pci_dev *dev);
1228 int pcix_get_mmrbc(struct pci_dev *dev);
1229 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
1230 int pcie_get_readrq(struct pci_dev *dev);
1231 int pcie_set_readrq(struct pci_dev *dev, int rq);
1232 int pcie_get_mps(struct pci_dev *dev);
1233 int pcie_set_mps(struct pci_dev *dev, int mps);
1234 u32 pcie_bandwidth_available(struct pci_dev *dev, struct pci_dev **limiting_dev,
1235 enum pci_bus_speed *speed,
1236 enum pcie_link_width *width);
1237 void pcie_print_link_status(struct pci_dev *dev);
1238 int pcie_reset_flr(struct pci_dev *dev, int probe);
1239 int pcie_flr(struct pci_dev *dev);
1240 int __pci_reset_function_locked(struct pci_dev *dev);
1241 int pci_reset_function(struct pci_dev *dev);
1242 int pci_reset_function_locked(struct pci_dev *dev);
1243 int pci_try_reset_function(struct pci_dev *dev);
1244 int pci_probe_reset_slot(struct pci_slot *slot);
1245 int pci_probe_reset_bus(struct pci_bus *bus);
1246 int pci_reset_bus(struct pci_dev *dev);
1247 void pci_reset_secondary_bus(struct pci_dev *dev);
1248 void pcibios_reset_secondary_bus(struct pci_dev *dev);
1249 void pci_update_resource(struct pci_dev *dev, int resno);
1250 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
1251 int __must_check pci_reassign_resource(struct pci_dev *dev, int i, resource_size_t add_size, resource_size_t align);
1252 void pci_release_resource(struct pci_dev *dev, int resno);
1253 static inline int pci_rebar_bytes_to_size(u64 bytes)
1255 bytes = roundup_pow_of_two(bytes);
1257 /* Return BAR size as defined in the resizable BAR specification */
1258 return max(ilog2(bytes), 20) - 20;
1261 u32 pci_rebar_get_possible_sizes(struct pci_dev *pdev, int bar);
1262 int __must_check pci_resize_resource(struct pci_dev *dev, int i, int size);
1263 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
1264 bool pci_device_is_present(struct pci_dev *pdev);
1265 void pci_ignore_hotplug(struct pci_dev *dev);
1266 struct pci_dev *pci_real_dma_dev(struct pci_dev *dev);
1267 int pci_status_get_and_clear_errors(struct pci_dev *pdev);
1269 int __printf(6, 7) pci_request_irq(struct pci_dev *dev, unsigned int nr,
1270 irq_handler_t handler, irq_handler_t thread_fn, void *dev_id,
1271 const char *fmt, ...);
1272 void pci_free_irq(struct pci_dev *dev, unsigned int nr, void *dev_id);
1274 /* ROM control related routines */
1275 int pci_enable_rom(struct pci_dev *pdev);
1276 void pci_disable_rom(struct pci_dev *pdev);
1277 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
1278 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
1280 /* Power management related routines */
1281 int pci_save_state(struct pci_dev *dev);
1282 void pci_restore_state(struct pci_dev *dev);
1283 struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev);
1284 int pci_load_saved_state(struct pci_dev *dev,
1285 struct pci_saved_state *state);
1286 int pci_load_and_free_saved_state(struct pci_dev *dev,
1287 struct pci_saved_state **state);
1288 struct pci_cap_saved_state *pci_find_saved_cap(struct pci_dev *dev, char cap);
1289 struct pci_cap_saved_state *pci_find_saved_ext_cap(struct pci_dev *dev,
1291 int pci_add_cap_save_buffer(struct pci_dev *dev, char cap, unsigned int size);
1292 int pci_add_ext_cap_save_buffer(struct pci_dev *dev,
1293 u16 cap, unsigned int size);
1294 int pci_platform_power_transition(struct pci_dev *dev, pci_power_t state);
1295 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
1296 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
1297 bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
1298 void pci_pme_active(struct pci_dev *dev, bool enable);
1299 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable);
1300 int pci_wake_from_d3(struct pci_dev *dev, bool enable);
1301 int pci_prepare_to_sleep(struct pci_dev *dev);
1302 int pci_back_from_sleep(struct pci_dev *dev);
1303 bool pci_dev_run_wake(struct pci_dev *dev);
1304 void pci_d3cold_enable(struct pci_dev *dev);
1305 void pci_d3cold_disable(struct pci_dev *dev);
1306 bool pcie_relaxed_ordering_enabled(struct pci_dev *dev);
1307 void pci_resume_bus(struct pci_bus *bus);
1308 void pci_bus_set_current_state(struct pci_bus *bus, pci_power_t state);
1310 /* For use by arch with custom probe code */
1311 void set_pcie_port_type(struct pci_dev *pdev);
1312 void set_pcie_hotplug_bridge(struct pci_dev *pdev);
1314 /* Functions for PCI Hotplug drivers to use */
1315 unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge);
1316 unsigned int pci_rescan_bus(struct pci_bus *bus);
1317 void pci_lock_rescan_remove(void);
1318 void pci_unlock_rescan_remove(void);
1320 /* Vital Product Data routines */
1321 ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
1322 ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
1324 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
1325 resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx);
1326 void pci_bus_assign_resources(const struct pci_bus *bus);
1327 void pci_bus_claim_resources(struct pci_bus *bus);
1328 void pci_bus_size_bridges(struct pci_bus *bus);
1329 int pci_claim_resource(struct pci_dev *, int);
1330 int pci_claim_bridge_resource(struct pci_dev *bridge, int i);
1331 void pci_assign_unassigned_resources(void);
1332 void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
1333 void pci_assign_unassigned_bus_resources(struct pci_bus *bus);
1334 void pci_assign_unassigned_root_bus_resources(struct pci_bus *bus);
1335 int pci_reassign_bridge_resources(struct pci_dev *bridge, unsigned long type);
1336 void pdev_enable_device(struct pci_dev *);
1337 int pci_enable_resources(struct pci_dev *, int mask);
1338 void pci_assign_irq(struct pci_dev *dev);
1339 struct resource *pci_find_resource(struct pci_dev *dev, struct resource *res);
1340 #define HAVE_PCI_REQ_REGIONS 2
1341 int __must_check pci_request_regions(struct pci_dev *, const char *);
1342 int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
1343 void pci_release_regions(struct pci_dev *);
1344 int __must_check pci_request_region(struct pci_dev *, int, const char *);
1345 void pci_release_region(struct pci_dev *, int);
1346 int pci_request_selected_regions(struct pci_dev *, int, const char *);
1347 int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
1348 void pci_release_selected_regions(struct pci_dev *, int);
1350 /* drivers/pci/bus.c */
1351 void pci_add_resource(struct list_head *resources, struct resource *res);
1352 void pci_add_resource_offset(struct list_head *resources, struct resource *res,
1353 resource_size_t offset);
1354 void pci_free_resource_list(struct list_head *resources);
1355 void pci_bus_add_resource(struct pci_bus *bus, struct resource *res,
1356 unsigned int flags);
1357 struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n);
1358 void pci_bus_remove_resources(struct pci_bus *bus);
1359 int devm_request_pci_bus_resources(struct device *dev,
1360 struct list_head *resources);
1362 /* Temporary until new and working PCI SBR API in place */
1363 int pci_bridge_secondary_bus_reset(struct pci_dev *dev);
1365 #define pci_bus_for_each_resource(bus, res, i) \
1367 (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
1370 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
1371 struct resource *res, resource_size_t size,
1372 resource_size_t align, resource_size_t min,
1373 unsigned long type_mask,
1374 resource_size_t (*alignf)(void *,
1375 const struct resource *,
1381 int pci_register_io_range(struct fwnode_handle *fwnode, phys_addr_t addr,
1382 resource_size_t size);
1383 unsigned long pci_address_to_pio(phys_addr_t addr);
1384 phys_addr_t pci_pio_to_address(unsigned long pio);
1385 int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr);
1386 int devm_pci_remap_iospace(struct device *dev, const struct resource *res,
1387 phys_addr_t phys_addr);
1388 void pci_unmap_iospace(struct resource *res);
1389 void __iomem *devm_pci_remap_cfgspace(struct device *dev,
1390 resource_size_t offset,
1391 resource_size_t size);
1392 void __iomem *devm_pci_remap_cfg_resource(struct device *dev,
1393 struct resource *res);
1395 static inline pci_bus_addr_t pci_bus_address(struct pci_dev *pdev, int bar)
1397 struct pci_bus_region region;
1399 pcibios_resource_to_bus(pdev->bus, ®ion, &pdev->resource[bar]);
1400 return region.start;
1403 /* Proper probing supporting hot-pluggable devices */
1404 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
1405 const char *mod_name);
1407 /* pci_register_driver() must be a macro so KBUILD_MODNAME can be expanded */
1408 #define pci_register_driver(driver) \
1409 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
1411 void pci_unregister_driver(struct pci_driver *dev);
1414 * module_pci_driver() - Helper macro for registering a PCI driver
1415 * @__pci_driver: pci_driver struct
1417 * Helper macro for PCI drivers which do not do anything special in module
1418 * init/exit. This eliminates a lot of boilerplate. Each module may only
1419 * use this macro once, and calling it replaces module_init() and module_exit()
1421 #define module_pci_driver(__pci_driver) \
1422 module_driver(__pci_driver, pci_register_driver, pci_unregister_driver)
1425 * builtin_pci_driver() - Helper macro for registering a PCI driver
1426 * @__pci_driver: pci_driver struct
1428 * Helper macro for PCI drivers which do not do anything special in their
1429 * init code. This eliminates a lot of boilerplate. Each driver may only
1430 * use this macro once, and calling it replaces device_initcall(...)
1432 #define builtin_pci_driver(__pci_driver) \
1433 builtin_driver(__pci_driver, pci_register_driver)
1435 struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
1436 int pci_add_dynid(struct pci_driver *drv,
1437 unsigned int vendor, unsigned int device,
1438 unsigned int subvendor, unsigned int subdevice,
1439 unsigned int class, unsigned int class_mask,
1440 unsigned long driver_data);
1441 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
1442 struct pci_dev *dev);
1443 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
1446 void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
1448 int pci_cfg_space_size(struct pci_dev *dev);
1449 unsigned char pci_bus_max_busnr(struct pci_bus *bus);
1450 void pci_setup_bridge(struct pci_bus *bus);
1451 resource_size_t pcibios_window_alignment(struct pci_bus *bus,
1452 unsigned long type);
1454 #define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
1455 #define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)
1457 int pci_set_vga_state(struct pci_dev *pdev, bool decode,
1458 unsigned int command_bits, u32 flags);
1461 * Virtual interrupts allow for more interrupts to be allocated
1462 * than the device has interrupts for. These are not programmed
1463 * into the device's MSI-X table and must be handled by some
1464 * other driver means.
1466 #define PCI_IRQ_VIRTUAL (1 << 4)
1468 #define PCI_IRQ_ALL_TYPES \
1469 (PCI_IRQ_LEGACY | PCI_IRQ_MSI | PCI_IRQ_MSIX)
1471 /* kmem_cache style wrapper around pci_alloc_consistent() */
1473 #include <linux/dmapool.h>
1475 #define pci_pool dma_pool
1476 #define pci_pool_create(name, pdev, size, align, allocation) \
1477 dma_pool_create(name, &pdev->dev, size, align, allocation)
1478 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
1479 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
1480 #define pci_pool_zalloc(pool, flags, handle) \
1481 dma_pool_zalloc(pool, flags, handle)
1482 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
1485 u32 vector; /* Kernel uses to write allocated vector */
1486 u16 entry; /* Driver uses to specify entry, OS writes */
1489 #ifdef CONFIG_PCI_MSI
1490 int pci_msi_vec_count(struct pci_dev *dev);
1491 void pci_disable_msi(struct pci_dev *dev);
1492 int pci_msix_vec_count(struct pci_dev *dev);
1493 void pci_disable_msix(struct pci_dev *dev);
1494 void pci_restore_msi_state(struct pci_dev *dev);
1495 int pci_msi_enabled(void);
1496 int pci_enable_msi(struct pci_dev *dev);
1497 int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
1498 int minvec, int maxvec);
1499 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1500 struct msix_entry *entries, int nvec)
1502 int rc = pci_enable_msix_range(dev, entries, nvec, nvec);
1507 int pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1508 unsigned int max_vecs, unsigned int flags,
1509 struct irq_affinity *affd);
1511 void pci_free_irq_vectors(struct pci_dev *dev);
1512 int pci_irq_vector(struct pci_dev *dev, unsigned int nr);
1513 const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev, int vec);
1516 static inline int pci_msi_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1517 static inline void pci_disable_msi(struct pci_dev *dev) { }
1518 static inline int pci_msix_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1519 static inline void pci_disable_msix(struct pci_dev *dev) { }
1520 static inline void pci_restore_msi_state(struct pci_dev *dev) { }
1521 static inline int pci_msi_enabled(void) { return 0; }
1522 static inline int pci_enable_msi(struct pci_dev *dev)
1524 static inline int pci_enable_msix_range(struct pci_dev *dev,
1525 struct msix_entry *entries, int minvec, int maxvec)
1527 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1528 struct msix_entry *entries, int nvec)
1532 pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1533 unsigned int max_vecs, unsigned int flags,
1534 struct irq_affinity *aff_desc)
1536 if ((flags & PCI_IRQ_LEGACY) && min_vecs == 1 && dev->irq)
1541 static inline void pci_free_irq_vectors(struct pci_dev *dev)
1545 static inline int pci_irq_vector(struct pci_dev *dev, unsigned int nr)
1547 if (WARN_ON_ONCE(nr > 0))
1551 static inline const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev,
1554 return cpu_possible_mask;
1559 * pci_irqd_intx_xlate() - Translate PCI INTx value to an IRQ domain hwirq
1560 * @d: the INTx IRQ domain
1561 * @node: the DT node for the device whose interrupt we're translating
1562 * @intspec: the interrupt specifier data from the DT
1563 * @intsize: the number of entries in @intspec
1564 * @out_hwirq: pointer at which to write the hwirq number
1565 * @out_type: pointer at which to write the interrupt type
1567 * Translate a PCI INTx interrupt number from device tree in the range 1-4, as
1568 * stored in the standard PCI_INTERRUPT_PIN register, to a value in the range
1569 * 0-3 suitable for use in a 4 entry IRQ domain. That is, subtract one from the
1570 * INTx value to obtain the hwirq number.
1572 * Returns 0 on success, or -EINVAL if the interrupt specifier is out of range.
1574 static inline int pci_irqd_intx_xlate(struct irq_domain *d,
1575 struct device_node *node,
1577 unsigned int intsize,
1578 unsigned long *out_hwirq,
1579 unsigned int *out_type)
1581 const u32 intx = intspec[0];
1583 if (intx < PCI_INTERRUPT_INTA || intx > PCI_INTERRUPT_INTD)
1586 *out_hwirq = intx - PCI_INTERRUPT_INTA;
1590 #ifdef CONFIG_PCIEPORTBUS
1591 extern bool pcie_ports_disabled;
1592 extern bool pcie_ports_native;
1594 #define pcie_ports_disabled true
1595 #define pcie_ports_native false
1598 #define PCIE_LINK_STATE_L0S BIT(0)
1599 #define PCIE_LINK_STATE_L1 BIT(1)
1600 #define PCIE_LINK_STATE_CLKPM BIT(2)
1601 #define PCIE_LINK_STATE_L1_1 BIT(3)
1602 #define PCIE_LINK_STATE_L1_2 BIT(4)
1603 #define PCIE_LINK_STATE_L1_1_PCIPM BIT(5)
1604 #define PCIE_LINK_STATE_L1_2_PCIPM BIT(6)
1606 #ifdef CONFIG_PCIEASPM
1607 int pci_disable_link_state(struct pci_dev *pdev, int state);
1608 int pci_disable_link_state_locked(struct pci_dev *pdev, int state);
1609 void pcie_no_aspm(void);
1610 bool pcie_aspm_support_enabled(void);
1611 bool pcie_aspm_enabled(struct pci_dev *pdev);
1613 static inline int pci_disable_link_state(struct pci_dev *pdev, int state)
1615 static inline int pci_disable_link_state_locked(struct pci_dev *pdev, int state)
1617 static inline void pcie_no_aspm(void) { }
1618 static inline bool pcie_aspm_support_enabled(void) { return false; }
1619 static inline bool pcie_aspm_enabled(struct pci_dev *pdev) { return false; }
1622 #ifdef CONFIG_PCIEAER
1623 bool pci_aer_available(void);
1625 static inline bool pci_aer_available(void) { return false; }
1628 bool pci_ats_disabled(void);
1630 void pci_cfg_access_lock(struct pci_dev *dev);
1631 bool pci_cfg_access_trylock(struct pci_dev *dev);
1632 void pci_cfg_access_unlock(struct pci_dev *dev);
1634 int pci_dev_trylock(struct pci_dev *dev);
1635 void pci_dev_unlock(struct pci_dev *dev);
1638 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
1639 * a PCI domain is defined to be a set of PCI buses which share
1640 * configuration space.
1642 #ifdef CONFIG_PCI_DOMAINS
1643 extern int pci_domains_supported;
1645 enum { pci_domains_supported = 0 };
1646 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1647 static inline int pci_proc_domain(struct pci_bus *bus) { return 0; }
1648 #endif /* CONFIG_PCI_DOMAINS */
1651 * Generic implementation for PCI domain support. If your
1652 * architecture does not need custom management of PCI
1653 * domains then this implementation will be used
1655 #ifdef CONFIG_PCI_DOMAINS_GENERIC
1656 static inline int pci_domain_nr(struct pci_bus *bus)
1658 return bus->domain_nr;
1661 int acpi_pci_bus_find_domain_nr(struct pci_bus *bus);
1663 static inline int acpi_pci_bus_find_domain_nr(struct pci_bus *bus)
1666 int pci_bus_find_domain_nr(struct pci_bus *bus, struct device *parent);
1669 /* Some architectures require additional setup to direct VGA traffic */
1670 typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
1671 unsigned int command_bits, u32 flags);
1672 void pci_register_set_vga_state(arch_set_vga_state_t func);
1675 pci_request_io_regions(struct pci_dev *pdev, const char *name)
1677 return pci_request_selected_regions(pdev,
1678 pci_select_bars(pdev, IORESOURCE_IO), name);
1682 pci_release_io_regions(struct pci_dev *pdev)
1684 return pci_release_selected_regions(pdev,
1685 pci_select_bars(pdev, IORESOURCE_IO));
1689 pci_request_mem_regions(struct pci_dev *pdev, const char *name)
1691 return pci_request_selected_regions(pdev,
1692 pci_select_bars(pdev, IORESOURCE_MEM), name);
1696 pci_release_mem_regions(struct pci_dev *pdev)
1698 return pci_release_selected_regions(pdev,
1699 pci_select_bars(pdev, IORESOURCE_MEM));
1702 #else /* CONFIG_PCI is not enabled */
1704 static inline void pci_set_flags(int flags) { }
1705 static inline void pci_add_flags(int flags) { }
1706 static inline void pci_clear_flags(int flags) { }
1707 static inline int pci_has_flag(int flag) { return 0; }
1710 * If the system does not have PCI, clearly these return errors. Define
1711 * these as simple inline functions to avoid hair in drivers.
1713 #define _PCI_NOP(o, s, t) \
1714 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
1716 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
1718 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
1719 _PCI_NOP(o, word, u16 x) \
1720 _PCI_NOP(o, dword, u32 x)
1721 _PCI_NOP_ALL(read, *)
1722 _PCI_NOP_ALL(write,)
1724 static inline struct pci_dev *pci_get_device(unsigned int vendor,
1725 unsigned int device,
1726 struct pci_dev *from)
1729 static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
1730 unsigned int device,
1731 unsigned int ss_vendor,
1732 unsigned int ss_device,
1733 struct pci_dev *from)
1736 static inline struct pci_dev *pci_get_class(unsigned int class,
1737 struct pci_dev *from)
1740 #define pci_dev_present(ids) (0)
1741 #define no_pci_devices() (1)
1742 #define pci_dev_put(dev) do { } while (0)
1744 static inline void pci_set_master(struct pci_dev *dev) { }
1745 static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
1746 static inline void pci_disable_device(struct pci_dev *dev) { }
1747 static inline int pcim_enable_device(struct pci_dev *pdev) { return -EIO; }
1748 static inline int pci_assign_resource(struct pci_dev *dev, int i)
1750 static inline int __pci_register_driver(struct pci_driver *drv,
1751 struct module *owner)
1753 static inline int pci_register_driver(struct pci_driver *drv)
1755 static inline void pci_unregister_driver(struct pci_driver *drv) { }
1756 static inline u8 pci_find_capability(struct pci_dev *dev, int cap)
1758 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
1761 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
1764 static inline u64 pci_get_dsn(struct pci_dev *dev)
1767 /* Power management related routines */
1768 static inline int pci_save_state(struct pci_dev *dev) { return 0; }
1769 static inline void pci_restore_state(struct pci_dev *dev) { }
1770 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
1772 static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable)
1774 static inline pci_power_t pci_choose_state(struct pci_dev *dev,
1777 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1781 static inline struct resource *pci_find_resource(struct pci_dev *dev,
1782 struct resource *res)
1784 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
1786 static inline void pci_release_regions(struct pci_dev *dev) { }
1788 static inline int pci_register_io_range(struct fwnode_handle *fwnode,
1789 phys_addr_t addr, resource_size_t size)
1792 static inline unsigned long pci_address_to_pio(phys_addr_t addr) { return -1; }
1794 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
1796 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
1799 static inline struct pci_dev *pci_get_domain_bus_and_slot(int domain,
1800 unsigned int bus, unsigned int devfn)
1803 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1804 static inline struct pci_dev *pci_dev_get(struct pci_dev *dev) { return NULL; }
1806 #define dev_is_pci(d) (false)
1807 #define dev_is_pf(d) (false)
1808 static inline bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags)
1810 static inline int pci_irqd_intx_xlate(struct irq_domain *d,
1811 struct device_node *node,
1813 unsigned int intsize,
1814 unsigned long *out_hwirq,
1815 unsigned int *out_type)
1818 static inline const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
1819 struct pci_dev *dev)
1821 static inline bool pci_ats_disabled(void) { return true; }
1823 static inline int pci_irq_vector(struct pci_dev *dev, unsigned int nr)
1829 pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1830 unsigned int max_vecs, unsigned int flags,
1831 struct irq_affinity *aff_desc)
1835 #endif /* CONFIG_PCI */
1838 pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs,
1839 unsigned int max_vecs, unsigned int flags)
1841 return pci_alloc_irq_vectors_affinity(dev, min_vecs, max_vecs, flags,
1845 /* Include architecture-dependent settings and functions */
1847 #include <asm/pci.h>
1849 /* These two functions provide almost identical functionality. Depending
1850 * on the architecture, one will be implemented as a wrapper around the
1851 * other (in drivers/pci/mmap.c).
1853 * pci_mmap_resource_range() maps a specific BAR, and vm->vm_pgoff
1854 * is expected to be an offset within that region.
1856 * pci_mmap_page_range() is the legacy architecture-specific interface,
1857 * which accepts a "user visible" resource address converted by
1858 * pci_resource_to_user(), as used in the legacy mmap() interface in
1861 int pci_mmap_resource_range(struct pci_dev *dev, int bar,
1862 struct vm_area_struct *vma,
1863 enum pci_mmap_state mmap_state, int write_combine);
1864 int pci_mmap_page_range(struct pci_dev *pdev, int bar,
1865 struct vm_area_struct *vma,
1866 enum pci_mmap_state mmap_state, int write_combine);
1868 #ifndef arch_can_pci_mmap_wc
1869 #define arch_can_pci_mmap_wc() 0
1872 #ifndef arch_can_pci_mmap_io
1873 #define arch_can_pci_mmap_io() 0
1874 #define pci_iobar_pfn(pdev, bar, vma) (-EINVAL)
1876 int pci_iobar_pfn(struct pci_dev *pdev, int bar, struct vm_area_struct *vma);
1879 #ifndef pci_root_bus_fwnode
1880 #define pci_root_bus_fwnode(bus) NULL
1884 * These helpers provide future and backwards compatibility
1885 * for accessing popular PCI BAR info
1887 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
1888 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
1889 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
1890 #define pci_resource_len(dev,bar) \
1891 ((pci_resource_start((dev), (bar)) == 0 && \
1892 pci_resource_end((dev), (bar)) == \
1893 pci_resource_start((dev), (bar))) ? 0 : \
1895 (pci_resource_end((dev), (bar)) - \
1896 pci_resource_start((dev), (bar)) + 1))
1899 * Similar to the helpers above, these manipulate per-pci_dev
1900 * driver-specific data. They are really just a wrapper around
1901 * the generic device structure functions of these calls.
1903 static inline void *pci_get_drvdata(struct pci_dev *pdev)
1905 return dev_get_drvdata(&pdev->dev);
1908 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
1910 dev_set_drvdata(&pdev->dev, data);
1913 static inline const char *pci_name(const struct pci_dev *pdev)
1915 return dev_name(&pdev->dev);
1918 void pci_resource_to_user(const struct pci_dev *dev, int bar,
1919 const struct resource *rsrc,
1920 resource_size_t *start, resource_size_t *end);
1923 * The world is not perfect and supplies us with broken PCI devices.
1924 * For at least a part of these bugs we need a work-around, so both
1925 * generic (drivers/pci/quirks.c) and per-architecture code can define
1926 * fixup hooks to be called for particular buggy devices.
1930 u16 vendor; /* Or PCI_ANY_ID */
1931 u16 device; /* Or PCI_ANY_ID */
1932 u32 class; /* Or PCI_ANY_ID */
1933 unsigned int class_shift; /* should be 0, 8, 16 */
1934 #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
1937 void (*hook)(struct pci_dev *dev);
1941 enum pci_fixup_pass {
1942 pci_fixup_early, /* Before probing BARs */
1943 pci_fixup_header, /* After reading configuration header */
1944 pci_fixup_final, /* Final phase of device fixups */
1945 pci_fixup_enable, /* pci_enable_device() time */
1946 pci_fixup_resume, /* pci_device_resume() */
1947 pci_fixup_suspend, /* pci_device_suspend() */
1948 pci_fixup_resume_early, /* pci_device_resume_early() */
1949 pci_fixup_suspend_late, /* pci_device_suspend_late() */
1952 #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
1953 #define ___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1954 class_shift, hook) \
1955 __ADDRESSABLE(hook) \
1956 asm(".section " #sec ", \"a\" \n" \
1958 ".short " #vendor ", " #device " \n" \
1959 ".long " #class ", " #class_shift " \n" \
1960 ".long " #hook " - . \n" \
1964 * Clang's LTO may rename static functions in C, but has no way to
1965 * handle such renamings when referenced from inline asm. To work
1966 * around this, create global C stubs for these cases.
1968 #ifdef CONFIG_LTO_CLANG
1969 #define __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1970 class_shift, hook, stub) \
1971 void __cficanonical stub(struct pci_dev *dev); \
1972 void __cficanonical stub(struct pci_dev *dev) \
1976 ___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1979 #define __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1980 class_shift, hook, stub) \
1981 ___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1985 #define DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1986 class_shift, hook) \
1987 __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1988 class_shift, hook, __UNIQUE_ID(hook))
1990 /* Anonymous variables would be nice... */
1991 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \
1992 class_shift, hook) \
1993 static const struct pci_fixup __PASTE(__pci_fixup_##name,__LINE__) __used \
1994 __attribute__((__section__(#section), aligned((sizeof(void *))))) \
1995 = { vendor, device, class, class_shift, hook };
1998 #define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class, \
1999 class_shift, hook) \
2000 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
2001 hook, vendor, device, class, class_shift, hook)
2002 #define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class, \
2003 class_shift, hook) \
2004 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
2005 hook, vendor, device, class, class_shift, hook)
2006 #define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class, \
2007 class_shift, hook) \
2008 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
2009 hook, vendor, device, class, class_shift, hook)
2010 #define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class, \
2011 class_shift, hook) \
2012 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
2013 hook, vendor, device, class, class_shift, hook)
2014 #define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class, \
2015 class_shift, hook) \
2016 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
2017 resume##hook, vendor, device, class, class_shift, hook)
2018 #define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class, \
2019 class_shift, hook) \
2020 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
2021 resume_early##hook, vendor, device, class, class_shift, hook)
2022 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class, \
2023 class_shift, hook) \
2024 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
2025 suspend##hook, vendor, device, class, class_shift, hook)
2026 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND_LATE(vendor, device, class, \
2027 class_shift, hook) \
2028 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
2029 suspend_late##hook, vendor, device, class, class_shift, hook)
2031 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
2032 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
2033 hook, vendor, device, PCI_ANY_ID, 0, hook)
2034 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
2035 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
2036 hook, vendor, device, PCI_ANY_ID, 0, hook)
2037 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
2038 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
2039 hook, vendor, device, PCI_ANY_ID, 0, hook)
2040 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
2041 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
2042 hook, vendor, device, PCI_ANY_ID, 0, hook)
2043 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
2044 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
2045 resume##hook, vendor, device, PCI_ANY_ID, 0, hook)
2046 #define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
2047 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
2048 resume_early##hook, vendor, device, PCI_ANY_ID, 0, hook)
2049 #define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
2050 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
2051 suspend##hook, vendor, device, PCI_ANY_ID, 0, hook)
2052 #define DECLARE_PCI_FIXUP_SUSPEND_LATE(vendor, device, hook) \
2053 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
2054 suspend_late##hook, vendor, device, PCI_ANY_ID, 0, hook)
2056 #ifdef CONFIG_PCI_QUIRKS
2057 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
2059 static inline void pci_fixup_device(enum pci_fixup_pass pass,
2060 struct pci_dev *dev) { }
2063 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
2064 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
2065 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
2066 int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name);
2067 int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
2069 void pcim_iounmap_regions(struct pci_dev *pdev, int mask);
2071 extern int pci_pci_problems;
2072 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
2073 #define PCIPCI_TRITON 2
2074 #define PCIPCI_NATOMA 4
2075 #define PCIPCI_VIAETBF 8
2076 #define PCIPCI_VSFX 16
2077 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
2078 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
2080 extern unsigned long pci_cardbus_io_size;
2081 extern unsigned long pci_cardbus_mem_size;
2082 extern u8 pci_dfl_cache_line_size;
2083 extern u8 pci_cache_line_size;
2085 /* Architecture-specific versions may override these (weak) */
2086 void pcibios_disable_device(struct pci_dev *dev);
2087 void pcibios_set_master(struct pci_dev *dev);
2088 int pcibios_set_pcie_reset_state(struct pci_dev *dev,
2089 enum pcie_reset_state state);
2090 int pcibios_add_device(struct pci_dev *dev);
2091 void pcibios_release_device(struct pci_dev *dev);
2093 void pcibios_penalize_isa_irq(int irq, int active);
2095 static inline void pcibios_penalize_isa_irq(int irq, int active) {}
2097 int pcibios_alloc_irq(struct pci_dev *dev);
2098 void pcibios_free_irq(struct pci_dev *dev);
2099 resource_size_t pcibios_default_alignment(void);
2101 #if defined(CONFIG_PCI_MMCONFIG) || defined(CONFIG_ACPI_MCFG)
2102 void __init pci_mmcfg_early_init(void);
2103 void __init pci_mmcfg_late_init(void);
2105 static inline void pci_mmcfg_early_init(void) { }
2106 static inline void pci_mmcfg_late_init(void) { }
2109 int pci_ext_cfg_avail(void);
2111 void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
2112 void __iomem *pci_ioremap_wc_bar(struct pci_dev *pdev, int bar);
2114 #ifdef CONFIG_PCI_IOV
2115 int pci_iov_virtfn_bus(struct pci_dev *dev, int id);
2116 int pci_iov_virtfn_devfn(struct pci_dev *dev, int id);
2118 int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
2119 void pci_disable_sriov(struct pci_dev *dev);
2121 int pci_iov_sysfs_link(struct pci_dev *dev, struct pci_dev *virtfn, int id);
2122 int pci_iov_add_virtfn(struct pci_dev *dev, int id);
2123 void pci_iov_remove_virtfn(struct pci_dev *dev, int id);
2124 int pci_num_vf(struct pci_dev *dev);
2125 int pci_vfs_assigned(struct pci_dev *dev);
2126 int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs);
2127 int pci_sriov_get_totalvfs(struct pci_dev *dev);
2128 int pci_sriov_configure_simple(struct pci_dev *dev, int nr_virtfn);
2129 resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno);
2130 void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe);
2132 /* Arch may override these (weak) */
2133 int pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs);
2134 int pcibios_sriov_disable(struct pci_dev *pdev);
2135 resource_size_t pcibios_iov_resource_alignment(struct pci_dev *dev, int resno);
2137 static inline int pci_iov_virtfn_bus(struct pci_dev *dev, int id)
2141 static inline int pci_iov_virtfn_devfn(struct pci_dev *dev, int id)
2145 static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
2148 static inline int pci_iov_sysfs_link(struct pci_dev *dev,
2149 struct pci_dev *virtfn, int id)
2153 static inline int pci_iov_add_virtfn(struct pci_dev *dev, int id)
2157 static inline void pci_iov_remove_virtfn(struct pci_dev *dev,
2159 static inline void pci_disable_sriov(struct pci_dev *dev) { }
2160 static inline int pci_num_vf(struct pci_dev *dev) { return 0; }
2161 static inline int pci_vfs_assigned(struct pci_dev *dev)
2163 static inline int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs)
2165 static inline int pci_sriov_get_totalvfs(struct pci_dev *dev)
2167 #define pci_sriov_configure_simple NULL
2168 static inline resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno)
2170 static inline void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe) { }
2173 #if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
2174 void pci_hp_create_module_link(struct pci_slot *pci_slot);
2175 void pci_hp_remove_module_link(struct pci_slot *pci_slot);
2179 * pci_pcie_cap - get the saved PCIe capability offset
2182 * PCIe capability offset is calculated at PCI device initialization
2183 * time and saved in the data structure. This function returns saved
2184 * PCIe capability offset. Using this instead of pci_find_capability()
2185 * reduces unnecessary search in the PCI configuration space. If you
2186 * need to calculate PCIe capability offset from raw device for some
2187 * reasons, please use pci_find_capability() instead.
2189 static inline int pci_pcie_cap(struct pci_dev *dev)
2191 return dev->pcie_cap;
2195 * pci_is_pcie - check if the PCI device is PCI Express capable
2198 * Returns: true if the PCI device is PCI Express capable, false otherwise.
2200 static inline bool pci_is_pcie(struct pci_dev *dev)
2202 return pci_pcie_cap(dev);
2206 * pcie_caps_reg - get the PCIe Capabilities Register
2209 static inline u16 pcie_caps_reg(const struct pci_dev *dev)
2211 return dev->pcie_flags_reg;
2215 * pci_pcie_type - get the PCIe device/port type
2218 static inline int pci_pcie_type(const struct pci_dev *dev)
2220 return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4;
2224 * pcie_find_root_port - Get the PCIe root port device
2227 * Traverse up the parent chain and return the PCIe Root Port PCI Device
2228 * for a given PCI/PCIe Device.
2230 static inline struct pci_dev *pcie_find_root_port(struct pci_dev *dev)
2233 if (pci_is_pcie(dev) &&
2234 pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT)
2236 dev = pci_upstream_bridge(dev);
2242 void pci_request_acs(void);
2243 bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags);
2244 bool pci_acs_path_enabled(struct pci_dev *start,
2245 struct pci_dev *end, u16 acs_flags);
2246 int pci_enable_atomic_ops_to_root(struct pci_dev *dev, u32 cap_mask);
2248 #define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */
2249 #define PCI_VPD_LRDT_ID(x) ((x) | PCI_VPD_LRDT)
2251 /* Large Resource Data Type Tag Item Names */
2252 #define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */
2253 #define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */
2254 #define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */
2256 #define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING)
2257 #define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA)
2258 #define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA)
2260 /* Small Resource Data Type Tag Item Names */
2261 #define PCI_VPD_STIN_END 0x0f /* End */
2263 #define PCI_VPD_SRDT_END (PCI_VPD_STIN_END << 3)
2265 #define PCI_VPD_SRDT_TIN_MASK 0x78
2266 #define PCI_VPD_SRDT_LEN_MASK 0x07
2267 #define PCI_VPD_LRDT_TIN_MASK 0x7f
2269 #define PCI_VPD_LRDT_TAG_SIZE 3
2270 #define PCI_VPD_SRDT_TAG_SIZE 1
2272 #define PCI_VPD_INFO_FLD_HDR_SIZE 3
2274 #define PCI_VPD_RO_KEYWORD_PARTNO "PN"
2275 #define PCI_VPD_RO_KEYWORD_SERIALNO "SN"
2276 #define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
2277 #define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
2278 #define PCI_VPD_RO_KEYWORD_CHKSUM "RV"
2281 * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length
2282 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
2284 * Returns the extracted Large Resource Data Type length.
2286 static inline u16 pci_vpd_lrdt_size(const u8 *lrdt)
2288 return (u16)lrdt[1] + ((u16)lrdt[2] << 8);
2292 * pci_vpd_lrdt_tag - Extracts the Large Resource Data Type Tag Item
2293 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
2295 * Returns the extracted Large Resource Data Type Tag item.
2297 static inline u16 pci_vpd_lrdt_tag(const u8 *lrdt)
2299 return (u16)(lrdt[0] & PCI_VPD_LRDT_TIN_MASK);
2303 * pci_vpd_srdt_size - Extracts the Small Resource Data Type length
2304 * @srdt: Pointer to the beginning of the Small Resource Data Type tag
2306 * Returns the extracted Small Resource Data Type length.
2308 static inline u8 pci_vpd_srdt_size(const u8 *srdt)
2310 return (*srdt) & PCI_VPD_SRDT_LEN_MASK;
2314 * pci_vpd_srdt_tag - Extracts the Small Resource Data Type Tag Item
2315 * @srdt: Pointer to the beginning of the Small Resource Data Type tag
2317 * Returns the extracted Small Resource Data Type Tag Item.
2319 static inline u8 pci_vpd_srdt_tag(const u8 *srdt)
2321 return ((*srdt) & PCI_VPD_SRDT_TIN_MASK) >> 3;
2325 * pci_vpd_info_field_size - Extracts the information field length
2326 * @info_field: Pointer to the beginning of an information field header
2328 * Returns the extracted information field length.
2330 static inline u8 pci_vpd_info_field_size(const u8 *info_field)
2332 return info_field[2];
2336 * pci_vpd_find_tag - Locates the Resource Data Type tag provided
2337 * @buf: Pointer to buffered vpd data
2338 * @len: The length of the vpd buffer
2339 * @rdt: The Resource Data Type to search for
2341 * Returns the index where the Resource Data Type was found or
2342 * -ENOENT otherwise.
2344 int pci_vpd_find_tag(const u8 *buf, unsigned int len, u8 rdt);
2347 * pci_vpd_find_info_keyword - Locates an information field keyword in the VPD
2348 * @buf: Pointer to buffered vpd data
2349 * @off: The offset into the buffer at which to begin the search
2350 * @len: The length of the buffer area, relative to off, in which to search
2351 * @kw: The keyword to search for
2353 * Returns the index where the information field keyword was found or
2354 * -ENOENT otherwise.
2356 int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
2357 unsigned int len, const char *kw);
2359 /* PCI <-> OF binding helpers */
2363 struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus);
2364 bool pci_host_of_has_msi_map(struct device *dev);
2366 /* Arch may override this (weak) */
2367 struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus);
2369 #else /* CONFIG_OF */
2370 static inline struct irq_domain *
2371 pci_host_bridge_of_msi_domain(struct pci_bus *bus) { return NULL; }
2372 static inline bool pci_host_of_has_msi_map(struct device *dev) { return false; }
2373 #endif /* CONFIG_OF */
2375 static inline struct device_node *
2376 pci_device_to_OF_node(const struct pci_dev *pdev)
2378 return pdev ? pdev->dev.of_node : NULL;
2381 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
2383 return bus ? bus->dev.of_node : NULL;
2387 struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus);
2390 pci_msi_register_fwnode_provider(struct fwnode_handle *(*fn)(struct device *));
2391 bool pci_pr3_present(struct pci_dev *pdev);
2393 static inline struct irq_domain *
2394 pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) { return NULL; }
2395 static inline bool pci_pr3_present(struct pci_dev *pdev) { return false; }
2399 static inline struct eeh_dev *pci_dev_to_eeh_dev(struct pci_dev *pdev)
2401 return pdev->dev.archdata.edev;
2405 void pci_add_dma_alias(struct pci_dev *dev, u8 devfn_from, unsigned nr_devfns);
2406 bool pci_devs_are_dma_aliases(struct pci_dev *dev1, struct pci_dev *dev2);
2407 int pci_for_each_dma_alias(struct pci_dev *pdev,
2408 int (*fn)(struct pci_dev *pdev,
2409 u16 alias, void *data), void *data);
2411 /* Helper functions for operation of device flag */
2412 static inline void pci_set_dev_assigned(struct pci_dev *pdev)
2414 pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED;
2416 static inline void pci_clear_dev_assigned(struct pci_dev *pdev)
2418 pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
2420 static inline bool pci_is_dev_assigned(struct pci_dev *pdev)
2422 return (pdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED) == PCI_DEV_FLAGS_ASSIGNED;
2426 * pci_ari_enabled - query ARI forwarding status
2429 * Returns true if ARI forwarding is enabled.
2431 static inline bool pci_ari_enabled(struct pci_bus *bus)
2433 return bus->self && bus->self->ari_enabled;
2437 * pci_is_thunderbolt_attached - whether device is on a Thunderbolt daisy chain
2438 * @pdev: PCI device to check
2440 * Walk upwards from @pdev and check for each encountered bridge if it's part
2441 * of a Thunderbolt controller. Reaching the host bridge means @pdev is not
2442 * Thunderbolt-attached. (But rather soldered to the mainboard usually.)
2444 static inline bool pci_is_thunderbolt_attached(struct pci_dev *pdev)
2446 struct pci_dev *parent = pdev;
2448 if (pdev->is_thunderbolt)
2451 while ((parent = pci_upstream_bridge(parent)))
2452 if (parent->is_thunderbolt)
2458 #if defined(CONFIG_PCIEPORTBUS) || defined(CONFIG_EEH)
2459 void pci_uevent_ers(struct pci_dev *pdev, enum pci_ers_result err_type);
2462 /* Provide the legacy pci_dma_* API */
2463 #include <linux/pci-dma-compat.h>
2465 #define pci_printk(level, pdev, fmt, arg...) \
2466 dev_printk(level, &(pdev)->dev, fmt, ##arg)
2468 #define pci_emerg(pdev, fmt, arg...) dev_emerg(&(pdev)->dev, fmt, ##arg)
2469 #define pci_alert(pdev, fmt, arg...) dev_alert(&(pdev)->dev, fmt, ##arg)
2470 #define pci_crit(pdev, fmt, arg...) dev_crit(&(pdev)->dev, fmt, ##arg)
2471 #define pci_err(pdev, fmt, arg...) dev_err(&(pdev)->dev, fmt, ##arg)
2472 #define pci_warn(pdev, fmt, arg...) dev_warn(&(pdev)->dev, fmt, ##arg)
2473 #define pci_notice(pdev, fmt, arg...) dev_notice(&(pdev)->dev, fmt, ##arg)
2474 #define pci_info(pdev, fmt, arg...) dev_info(&(pdev)->dev, fmt, ##arg)
2475 #define pci_dbg(pdev, fmt, arg...) dev_dbg(&(pdev)->dev, fmt, ##arg)
2477 #define pci_notice_ratelimited(pdev, fmt, arg...) \
2478 dev_notice_ratelimited(&(pdev)->dev, fmt, ##arg)
2480 #define pci_info_ratelimited(pdev, fmt, arg...) \
2481 dev_info_ratelimited(&(pdev)->dev, fmt, ##arg)
2483 #define pci_WARN(pdev, condition, fmt, arg...) \
2484 WARN(condition, "%s %s: " fmt, \
2485 dev_driver_string(&(pdev)->dev), pci_name(pdev), ##arg)
2487 #define pci_WARN_ONCE(pdev, condition, fmt, arg...) \
2488 WARN_ONCE(condition, "%s %s: " fmt, \
2489 dev_driver_string(&(pdev)->dev), pci_name(pdev), ##arg)
2491 #endif /* LINUX_PCI_H */