1 /* SPDX-License-Identifier: GPL-2.0 */
5 * PCI defines and function prototypes
6 * Copyright 1994, Drew Eckhardt
9 * For more information, please consult the following manuals (look at
10 * http://www.pcisig.com/ for how to get them):
12 * PCI BIOS Specification
13 * PCI Local Bus Specification
14 * PCI to PCI Bridge Specification
15 * PCI System Design Guide
21 #include <linux/mod_devicetable.h>
23 #include <linux/types.h>
24 #include <linux/init.h>
25 #include <linux/ioport.h>
26 #include <linux/list.h>
27 #include <linux/compiler.h>
28 #include <linux/errno.h>
29 #include <linux/kobject.h>
30 #include <linux/atomic.h>
31 #include <linux/device.h>
32 #include <linux/interrupt.h>
34 #include <linux/resource_ext.h>
35 #include <uapi/linux/pci.h>
37 #include <linux/pci_ids.h>
40 * The PCI interface treats multi-function devices as independent
41 * devices. The slot/function address of each device is encoded
42 * in a single byte as follows:
47 * PCI_DEVFN(), PCI_SLOT(), and PCI_FUNC() are defined in uapi/linux/pci.h.
48 * In the interest of not exposing interfaces to user-space unnecessarily,
49 * the following kernel-only defines are being added here.
51 #define PCI_DEVID(bus, devfn) ((((u16)(bus)) << 8) | (devfn))
52 /* return bus from PCI devid = ((u16)bus_number) << 8) | devfn */
53 #define PCI_BUS_NUM(x) (((x) >> 8) & 0xff)
55 /* pci_slot represents a physical slot */
57 struct pci_bus *bus; /* Bus this slot is on */
58 struct list_head list; /* Node in list of slots */
59 struct hotplug_slot *hotplug; /* Hotplug info (move here) */
60 unsigned char number; /* PCI_SLOT(pci_dev->devfn) */
64 static inline const char *pci_slot_name(const struct pci_slot *slot)
66 return kobject_name(&slot->kobj);
69 /* File state for mmap()s on /proc/bus/pci/X/Y */
75 /* For PCI devices, the region numbers are assigned this way: */
77 /* #0-5: standard PCI resources */
79 PCI_STD_RESOURCE_END = 5,
81 /* #6: expansion ROM resource */
84 /* Device-specific resources */
87 PCI_IOV_RESOURCE_END = PCI_IOV_RESOURCES + PCI_SRIOV_NUM_BARS - 1,
90 /* Resources assigned to buses behind the bridge */
91 #define PCI_BRIDGE_RESOURCE_NUM 4
94 PCI_BRIDGE_RESOURCE_END = PCI_BRIDGE_RESOURCES +
95 PCI_BRIDGE_RESOURCE_NUM - 1,
97 /* Total resources associated with a PCI device */
100 /* Preserve this for compatibility */
101 DEVICE_COUNT_RESOURCE = PCI_NUM_RESOURCES,
105 * enum pci_interrupt_pin - PCI INTx interrupt values
106 * @PCI_INTERRUPT_UNKNOWN: Unknown or unassigned interrupt
107 * @PCI_INTERRUPT_INTA: PCI INTA pin
108 * @PCI_INTERRUPT_INTB: PCI INTB pin
109 * @PCI_INTERRUPT_INTC: PCI INTC pin
110 * @PCI_INTERRUPT_INTD: PCI INTD pin
112 * Corresponds to values for legacy PCI INTx interrupts, as can be found in the
113 * PCI_INTERRUPT_PIN register.
115 enum pci_interrupt_pin {
116 PCI_INTERRUPT_UNKNOWN,
123 /* The number of legacy PCI INTx interrupts */
124 #define PCI_NUM_INTX 4
127 * pci_power_t values must match the bits in the Capabilities PME_Support
128 * and Control/Status PowerState fields in the Power Management capability.
130 typedef int __bitwise pci_power_t;
132 #define PCI_D0 ((pci_power_t __force) 0)
133 #define PCI_D1 ((pci_power_t __force) 1)
134 #define PCI_D2 ((pci_power_t __force) 2)
135 #define PCI_D3hot ((pci_power_t __force) 3)
136 #define PCI_D3cold ((pci_power_t __force) 4)
137 #define PCI_UNKNOWN ((pci_power_t __force) 5)
138 #define PCI_POWER_ERROR ((pci_power_t __force) -1)
140 /* Remember to update this when the list above changes! */
141 extern const char *pci_power_names[];
143 static inline const char *pci_power_name(pci_power_t state)
145 return pci_power_names[1 + (__force int) state];
148 #define PCI_PM_D2_DELAY 200
149 #define PCI_PM_D3_WAIT 10
150 #define PCI_PM_D3COLD_WAIT 100
151 #define PCI_PM_BUS_WAIT 50
154 * typedef pci_channel_state_t
156 * The pci_channel state describes connectivity between the CPU and
157 * the PCI device. If some PCI bus between here and the PCI device
158 * has crashed or locked up, this info is reflected here.
160 typedef unsigned int __bitwise pci_channel_state_t;
162 enum pci_channel_state {
163 /* I/O channel is in normal state */
164 pci_channel_io_normal = (__force pci_channel_state_t) 1,
166 /* I/O to channel is blocked */
167 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
169 /* PCI card is dead */
170 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
173 typedef unsigned int __bitwise pcie_reset_state_t;
175 enum pcie_reset_state {
176 /* Reset is NOT asserted (Use to deassert reset) */
177 pcie_deassert_reset = (__force pcie_reset_state_t) 1,
179 /* Use #PERST to reset PCIe device */
180 pcie_warm_reset = (__force pcie_reset_state_t) 2,
182 /* Use PCIe Hot Reset to reset device */
183 pcie_hot_reset = (__force pcie_reset_state_t) 3
186 typedef unsigned short __bitwise pci_dev_flags_t;
188 /* INTX_DISABLE in PCI_COMMAND register disables MSI too */
189 PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) (1 << 0),
190 /* Device configuration is irrevocably lost if disabled into D3 */
191 PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) (1 << 1),
192 /* Provide indication device is assigned by a Virtual Machine Manager */
193 PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) (1 << 2),
194 /* Flag for quirk use to store if quirk-specific ACS is enabled */
195 PCI_DEV_FLAGS_ACS_ENABLED_QUIRK = (__force pci_dev_flags_t) (1 << 3),
196 /* Use a PCIe-to-PCI bridge alias even if !pci_is_pcie */
197 PCI_DEV_FLAG_PCIE_BRIDGE_ALIAS = (__force pci_dev_flags_t) (1 << 5),
198 /* Do not use bus resets for device */
199 PCI_DEV_FLAGS_NO_BUS_RESET = (__force pci_dev_flags_t) (1 << 6),
200 /* Do not use PM reset even if device advertises NoSoftRst- */
201 PCI_DEV_FLAGS_NO_PM_RESET = (__force pci_dev_flags_t) (1 << 7),
202 /* Get VPD from function 0 VPD */
203 PCI_DEV_FLAGS_VPD_REF_F0 = (__force pci_dev_flags_t) (1 << 8),
204 /* A non-root bridge where translation occurs, stop alias search here */
205 PCI_DEV_FLAGS_BRIDGE_XLATE_ROOT = (__force pci_dev_flags_t) (1 << 9),
206 /* Do not use FLR even if device advertises PCI_AF_CAP */
207 PCI_DEV_FLAGS_NO_FLR_RESET = (__force pci_dev_flags_t) (1 << 10),
208 /* Don't use Relaxed Ordering for TLPs directed at this device */
209 PCI_DEV_FLAGS_NO_RELAXED_ORDERING = (__force pci_dev_flags_t) (1 << 11),
212 enum pci_irq_reroute_variant {
213 INTEL_IRQ_REROUTE_VARIANT = 1,
214 MAX_IRQ_REROUTE_VARIANTS = 3
217 typedef unsigned short __bitwise pci_bus_flags_t;
219 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
220 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
221 PCI_BUS_FLAGS_NO_AERSID = (__force pci_bus_flags_t) 4,
222 PCI_BUS_FLAGS_NO_EXTCFG = (__force pci_bus_flags_t) 8,
225 /* Values from Link Status register, PCIe r3.1, sec 7.8.8 */
226 enum pcie_link_width {
227 PCIE_LNK_WIDTH_RESRV = 0x00,
235 PCIE_LNK_WIDTH_UNKNOWN = 0xff,
238 /* Based on the PCI Hotplug Spec, but some values are made up by us */
240 PCI_SPEED_33MHz = 0x00,
241 PCI_SPEED_66MHz = 0x01,
242 PCI_SPEED_66MHz_PCIX = 0x02,
243 PCI_SPEED_100MHz_PCIX = 0x03,
244 PCI_SPEED_133MHz_PCIX = 0x04,
245 PCI_SPEED_66MHz_PCIX_ECC = 0x05,
246 PCI_SPEED_100MHz_PCIX_ECC = 0x06,
247 PCI_SPEED_133MHz_PCIX_ECC = 0x07,
248 PCI_SPEED_66MHz_PCIX_266 = 0x09,
249 PCI_SPEED_100MHz_PCIX_266 = 0x0a,
250 PCI_SPEED_133MHz_PCIX_266 = 0x0b,
256 PCI_SPEED_66MHz_PCIX_533 = 0x11,
257 PCI_SPEED_100MHz_PCIX_533 = 0x12,
258 PCI_SPEED_133MHz_PCIX_533 = 0x13,
259 PCIE_SPEED_2_5GT = 0x14,
260 PCIE_SPEED_5_0GT = 0x15,
261 PCIE_SPEED_8_0GT = 0x16,
262 PCIE_SPEED_16_0GT = 0x17,
263 PCIE_SPEED_32_0GT = 0x18,
264 PCI_SPEED_UNKNOWN = 0xff,
267 enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev);
268 enum pcie_link_width pcie_get_width_cap(struct pci_dev *dev);
270 struct pci_cap_saved_data {
277 struct pci_cap_saved_state {
278 struct hlist_node next;
279 struct pci_cap_saved_data cap;
283 struct pcie_link_state;
289 /* The pci_dev structure describes PCI devices */
291 struct list_head bus_list; /* Node in per-bus list */
292 struct pci_bus *bus; /* Bus this device is on */
293 struct pci_bus *subordinate; /* Bus this device bridges to */
295 void *sysdata; /* Hook for sys-specific extension */
296 struct proc_dir_entry *procent; /* Device entry in /proc/bus/pci */
297 struct pci_slot *slot; /* Physical slot this device is in */
299 unsigned int devfn; /* Encoded device & function index */
300 unsigned short vendor;
301 unsigned short device;
302 unsigned short subsystem_vendor;
303 unsigned short subsystem_device;
304 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
305 u8 revision; /* PCI revision, low byte of class word */
306 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
307 #ifdef CONFIG_PCIEAER
308 u16 aer_cap; /* AER capability offset */
309 struct aer_stats *aer_stats; /* AER stats for this device */
311 u8 pcie_cap; /* PCIe capability offset */
312 u8 msi_cap; /* MSI capability offset */
313 u8 msix_cap; /* MSI-X capability offset */
314 u8 pcie_mpss:3; /* PCIe Max Payload Size Supported */
315 u8 rom_base_reg; /* Config register controlling ROM */
316 u8 pin; /* Interrupt pin this device uses */
317 u16 pcie_flags_reg; /* Cached PCIe Capabilities Register */
318 unsigned long *dma_alias_mask;/* Mask of enabled devfn aliases */
320 struct pci_driver *driver; /* Driver bound to this device */
321 u64 dma_mask; /* Mask of the bits of bus address this
322 device implements. Normally this is
323 0xffffffff. You only need to change
324 this if your device has broken DMA
325 or supports 64-bit transfers. */
327 struct device_dma_parameters dma_parms;
329 pci_power_t current_state; /* Current operating state. In ACPI,
330 this is D0-D3, D0 being fully
331 functional, and D3 being off. */
332 unsigned int imm_ready:1; /* Supports Immediate Readiness */
333 u8 pm_cap; /* PM capability offset */
334 unsigned int pme_support:5; /* Bitmask of states from which PME#
336 unsigned int pme_poll:1; /* Poll device's PME status bit */
337 unsigned int d1_support:1; /* Low power state D1 is supported */
338 unsigned int d2_support:1; /* Low power state D2 is supported */
339 unsigned int no_d1d2:1; /* D1 and D2 are forbidden */
340 unsigned int no_d3cold:1; /* D3cold is forbidden */
341 unsigned int bridge_d3:1; /* Allow D3 for bridge */
342 unsigned int d3cold_allowed:1; /* D3cold is allowed by user */
343 unsigned int mmio_always_on:1; /* Disallow turning off io/mem
344 decoding during BAR sizing */
345 unsigned int wakeup_prepared:1;
346 unsigned int runtime_d3cold:1; /* Whether go through runtime
347 D3cold, not set for devices
348 powered on/off by the
349 corresponding bridge */
350 unsigned int skip_bus_pm:1; /* Internal: Skip bus-level PM */
351 unsigned int ignore_hotplug:1; /* Ignore hotplug events */
352 unsigned int hotplug_user_indicators:1; /* SlotCtl indicators
353 controlled exclusively by
355 unsigned int clear_retrain_link:1; /* Need to clear Retrain Link
357 unsigned int d3_delay; /* D3->D0 transition time in ms */
358 unsigned int d3cold_delay; /* D3cold->D0 transition time in ms */
360 #ifdef CONFIG_PCIEASPM
361 struct pcie_link_state *link_state; /* ASPM link state */
362 unsigned int ltr_path:1; /* Latency Tolerance Reporting
363 supported from root to here */
365 unsigned int eetlp_prefix_path:1; /* End-to-End TLP Prefix */
367 pci_channel_state_t error_state; /* Current connectivity state */
368 struct device dev; /* Generic device interface */
370 int cfg_size; /* Size of config space */
373 * Instead of touching interrupt line and base address registers
374 * directly, use the values stored here. They might be different!
377 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
379 bool match_driver; /* Skip attaching driver */
381 unsigned int transparent:1; /* Subtractive decode bridge */
382 unsigned int io_window:1; /* Bridge has I/O window */
383 unsigned int pref_window:1; /* Bridge has pref mem window */
384 unsigned int pref_64_window:1; /* Pref mem window is 64-bit */
385 unsigned int multifunction:1; /* Multi-function device */
387 unsigned int is_busmaster:1; /* Is busmaster */
388 unsigned int no_msi:1; /* May not use MSI */
389 unsigned int no_64bit_msi:1; /* May only use 32-bit MSIs */
390 unsigned int block_cfg_access:1; /* Config space access blocked */
391 unsigned int broken_parity_status:1; /* Generates false positive parity */
392 unsigned int irq_reroute_variant:2; /* Needs IRQ rerouting variant */
393 unsigned int msi_enabled:1;
394 unsigned int msix_enabled:1;
395 unsigned int ari_enabled:1; /* ARI forwarding */
396 unsigned int ats_enabled:1; /* Address Translation Svc */
397 unsigned int pasid_enabled:1; /* Process Address Space ID */
398 unsigned int pri_enabled:1; /* Page Request Interface */
399 unsigned int is_managed:1;
400 unsigned int needs_freset:1; /* Requires fundamental reset */
401 unsigned int state_saved:1;
402 unsigned int is_physfn:1;
403 unsigned int is_virtfn:1;
404 unsigned int reset_fn:1;
405 unsigned int is_hotplug_bridge:1;
406 unsigned int shpc_managed:1; /* SHPC owned by shpchp */
407 unsigned int is_thunderbolt:1; /* Thunderbolt controller */
409 * Devices marked being untrusted are the ones that can potentially
410 * execute DMA attacks and similar. They are typically connected
411 * through external ports such as Thunderbolt but not limited to
412 * that. When an IOMMU is enabled they should be getting full
413 * mappings to make sure they cannot access arbitrary memory.
415 unsigned int untrusted:1;
416 unsigned int __aer_firmware_first_valid:1;
417 unsigned int __aer_firmware_first:1;
418 unsigned int broken_intx_masking:1; /* INTx masking can't be used */
419 unsigned int io_window_1k:1; /* Intel bridge 1K I/O windows */
420 unsigned int irq_managed:1;
421 unsigned int has_secondary_link:1;
422 unsigned int non_compliant_bars:1; /* Broken BARs; ignore them */
423 unsigned int is_probed:1; /* Device probing in progress */
424 unsigned int link_active_reporting:1;/* Device capable of reporting link active */
425 unsigned int no_vf_scan:1; /* Don't scan for VFs after IOV enablement */
426 pci_dev_flags_t dev_flags;
427 atomic_t enable_cnt; /* pci_enable_device has been called */
429 u32 saved_config_space[16]; /* Config space saved at suspend time */
430 struct hlist_head saved_cap_space;
431 struct bin_attribute *rom_attr; /* Attribute descriptor for sysfs ROM entry */
432 int rom_attr_enabled; /* Display of ROM attribute enabled? */
433 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
434 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
436 #ifdef CONFIG_HOTPLUG_PCI_PCIE
437 unsigned int broken_cmd_compl:1; /* No compl for some cmds */
439 #ifdef CONFIG_PCIE_PTM
440 unsigned int ptm_root:1;
441 unsigned int ptm_enabled:1;
444 #ifdef CONFIG_PCI_MSI
445 const struct attribute_group **msi_irq_groups;
448 #ifdef CONFIG_PCI_ATS
450 struct pci_sriov *sriov; /* PF: SR-IOV info */
451 struct pci_dev *physfn; /* VF: related PF */
453 u16 ats_cap; /* ATS Capability offset */
454 u8 ats_stu; /* ATS Smallest Translation Unit */
455 atomic_t ats_ref_cnt; /* Number of VFs with ATS enabled */
457 #ifdef CONFIG_PCI_PRI
458 u32 pri_reqs_alloc; /* Number of PRI requests allocated */
460 #ifdef CONFIG_PCI_PASID
463 #ifdef CONFIG_PCI_P2PDMA
464 struct pci_p2pdma *p2pdma;
466 phys_addr_t rom; /* Physical address if not from BAR */
467 size_t romlen; /* Length if not from BAR */
468 char *driver_override; /* Driver name to force a match */
470 unsigned long priv_flags; /* Private flags for the PCI driver */
473 static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
475 #ifdef CONFIG_PCI_IOV
482 struct pci_dev *pci_alloc_dev(struct pci_bus *bus);
484 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
485 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
487 static inline int pci_channel_offline(struct pci_dev *pdev)
489 return (pdev->error_state != pci_channel_io_normal);
492 struct pci_host_bridge {
494 struct pci_bus *bus; /* Root bus */
498 struct list_head windows; /* resource_entry */
499 struct list_head dma_ranges; /* dma ranges resource list */
500 u8 (*swizzle_irq)(struct pci_dev *, u8 *); /* Platform IRQ swizzler */
501 int (*map_irq)(const struct pci_dev *, u8, u8);
502 void (*release_fn)(struct pci_host_bridge *);
504 struct msi_controller *msi;
505 unsigned int ignore_reset_delay:1; /* For entire hierarchy */
506 unsigned int no_ext_tags:1; /* No Extended Tags */
507 unsigned int native_aer:1; /* OS may use PCIe AER */
508 unsigned int native_pcie_hotplug:1; /* OS may use PCIe hotplug */
509 unsigned int native_shpc_hotplug:1; /* OS may use SHPC hotplug */
510 unsigned int native_pme:1; /* OS may use PCIe PME */
511 unsigned int native_ltr:1; /* OS may use PCIe LTR */
512 unsigned int preserve_config:1; /* Preserve FW resource setup */
514 /* Resource alignment requirements */
515 resource_size_t (*align_resource)(struct pci_dev *dev,
516 const struct resource *res,
517 resource_size_t start,
518 resource_size_t size,
519 resource_size_t align);
520 unsigned long private[0] ____cacheline_aligned;
523 #define to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev)
525 static inline void *pci_host_bridge_priv(struct pci_host_bridge *bridge)
527 return (void *)bridge->private;
530 static inline struct pci_host_bridge *pci_host_bridge_from_priv(void *priv)
532 return container_of(priv, struct pci_host_bridge, private);
535 struct pci_host_bridge *pci_alloc_host_bridge(size_t priv);
536 struct pci_host_bridge *devm_pci_alloc_host_bridge(struct device *dev,
538 void pci_free_host_bridge(struct pci_host_bridge *bridge);
539 struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus);
541 void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
542 void (*release_fn)(struct pci_host_bridge *),
545 int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge);
548 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
549 * to P2P or CardBus bridge windows) go in a table. Additional ones (for
550 * buses below host bridges or subtractive decode bridges) go in the list.
551 * Use pci_bus_for_each_resource() to iterate through all the resources.
555 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly
556 * and there's no way to program the bridge with the details of the window.
557 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive-
558 * decode bit set, because they are explicit and can be programmed with _SRS.
560 #define PCI_SUBTRACTIVE_DECODE 0x1
562 struct pci_bus_resource {
563 struct list_head list;
564 struct resource *res;
568 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
571 struct list_head node; /* Node in list of buses */
572 struct pci_bus *parent; /* Parent bus this bridge is on */
573 struct list_head children; /* List of child buses */
574 struct list_head devices; /* List of devices on this bus */
575 struct pci_dev *self; /* Bridge device as seen by parent */
576 struct list_head slots; /* List of slots on this bus;
577 protected by pci_slot_mutex */
578 struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
579 struct list_head resources; /* Address space routed to this bus */
580 struct resource busn_res; /* Bus numbers routed to this bus */
582 struct pci_ops *ops; /* Configuration access functions */
583 struct msi_controller *msi; /* MSI controller */
584 void *sysdata; /* Hook for sys-specific extension */
585 struct proc_dir_entry *procdir; /* Directory entry in /proc/bus/pci */
587 unsigned char number; /* Bus number */
588 unsigned char primary; /* Number of primary bridge */
589 unsigned char max_bus_speed; /* enum pci_bus_speed */
590 unsigned char cur_bus_speed; /* enum pci_bus_speed */
591 #ifdef CONFIG_PCI_DOMAINS_GENERIC
597 unsigned short bridge_ctl; /* Manage NO_ISA/FBB/et al behaviors */
598 pci_bus_flags_t bus_flags; /* Inherited by child buses */
599 struct device *bridge;
601 struct bin_attribute *legacy_io; /* Legacy I/O for this bus */
602 struct bin_attribute *legacy_mem; /* Legacy mem */
603 unsigned int is_added:1;
606 #define to_pci_bus(n) container_of(n, struct pci_bus, dev)
608 static inline u16 pci_dev_id(struct pci_dev *dev)
610 return PCI_DEVID(dev->bus->number, dev->devfn);
614 * Returns true if the PCI bus is root (behind host-PCI bridge),
617 * Some code assumes that "bus->self == NULL" means that bus is a root bus.
618 * This is incorrect because "virtual" buses added for SR-IOV (via
619 * virtfn_add_bus()) have "bus->self == NULL" but are not root buses.
621 static inline bool pci_is_root_bus(struct pci_bus *pbus)
623 return !(pbus->parent);
627 * pci_is_bridge - check if the PCI device is a bridge
630 * Return true if the PCI device is bridge whether it has subordinate
633 static inline bool pci_is_bridge(struct pci_dev *dev)
635 return dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
636 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS;
639 #define for_each_pci_bridge(dev, bus) \
640 list_for_each_entry(dev, &bus->devices, bus_list) \
641 if (!pci_is_bridge(dev)) {} else
643 static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev)
645 dev = pci_physfn(dev);
646 if (pci_is_root_bus(dev->bus))
649 return dev->bus->self;
652 struct device *pci_get_host_bridge_device(struct pci_dev *dev);
653 void pci_put_host_bridge_device(struct device *dev);
655 #ifdef CONFIG_PCI_MSI
656 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
658 return pci_dev->msi_enabled || pci_dev->msix_enabled;
661 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
664 /* Error values that may be returned by PCI functions */
665 #define PCIBIOS_SUCCESSFUL 0x00
666 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
667 #define PCIBIOS_BAD_VENDOR_ID 0x83
668 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
669 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
670 #define PCIBIOS_SET_FAILED 0x88
671 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
673 /* Translate above to generic errno for passing back through non-PCI code */
674 static inline int pcibios_err_to_errno(int err)
676 if (err <= PCIBIOS_SUCCESSFUL)
677 return err; /* Assume already errno */
680 case PCIBIOS_FUNC_NOT_SUPPORTED:
682 case PCIBIOS_BAD_VENDOR_ID:
684 case PCIBIOS_DEVICE_NOT_FOUND:
686 case PCIBIOS_BAD_REGISTER_NUMBER:
688 case PCIBIOS_SET_FAILED:
690 case PCIBIOS_BUFFER_TOO_SMALL:
697 /* Low-level architecture-dependent routines */
700 int (*add_bus)(struct pci_bus *bus);
701 void (*remove_bus)(struct pci_bus *bus);
702 void __iomem *(*map_bus)(struct pci_bus *bus, unsigned int devfn, int where);
703 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
704 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
708 * ACPI needs to be able to access PCI config space before we've done a
709 * PCI bus scan and created pci_bus structures.
711 int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
712 int reg, int len, u32 *val);
713 int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
714 int reg, int len, u32 val);
716 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
717 typedef u64 pci_bus_addr_t;
719 typedef u32 pci_bus_addr_t;
722 struct pci_bus_region {
723 pci_bus_addr_t start;
728 spinlock_t lock; /* Protects list, index */
729 struct list_head list; /* For IDs added at runtime */
734 * PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
735 * a set of callbacks in struct pci_error_handlers, that device driver
736 * will be notified of PCI bus errors, and will be driven to recovery
737 * when an error occurs.
740 typedef unsigned int __bitwise pci_ers_result_t;
742 enum pci_ers_result {
743 /* No result/none/not supported in device driver */
744 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
746 /* Device driver can recover without slot reset */
747 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
749 /* Device driver wants slot to be reset */
750 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
752 /* Device has completely failed, is unrecoverable */
753 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
755 /* Device driver is fully recovered and operational */
756 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
758 /* No AER capabilities registered for the driver */
759 PCI_ERS_RESULT_NO_AER_DRIVER = (__force pci_ers_result_t) 6,
762 /* PCI bus error event callbacks */
763 struct pci_error_handlers {
764 /* PCI bus error detected on this device */
765 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
766 enum pci_channel_state error);
768 /* MMIO has been re-enabled, but not DMA */
769 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
771 /* PCI slot has been reset */
772 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
774 /* PCI function reset prepare or completed */
775 void (*reset_prepare)(struct pci_dev *dev);
776 void (*reset_done)(struct pci_dev *dev);
778 /* Device driver may resume normal operations */
779 void (*resume)(struct pci_dev *dev);
786 * struct pci_driver - PCI driver structure
787 * @node: List of driver structures.
788 * @name: Driver name.
789 * @id_table: Pointer to table of device IDs the driver is
790 * interested in. Most drivers should export this
791 * table using MODULE_DEVICE_TABLE(pci,...).
792 * @probe: This probing function gets called (during execution
793 * of pci_register_driver() for already existing
794 * devices or later if a new device gets inserted) for
795 * all PCI devices which match the ID table and are not
796 * "owned" by the other drivers yet. This function gets
797 * passed a "struct pci_dev \*" for each device whose
798 * entry in the ID table matches the device. The probe
799 * function returns zero when the driver chooses to
800 * take "ownership" of the device or an error code
801 * (negative number) otherwise.
802 * The probe function always gets called from process
803 * context, so it can sleep.
804 * @remove: The remove() function gets called whenever a device
805 * being handled by this driver is removed (either during
806 * deregistration of the driver or when it's manually
807 * pulled out of a hot-pluggable slot).
808 * The remove function always gets called from process
809 * context, so it can sleep.
810 * @suspend: Put device into low power state.
811 * @suspend_late: Put device into low power state.
812 * @resume_early: Wake device from low power state.
813 * @resume: Wake device from low power state.
814 * (Please see Documentation/power/pci.rst for descriptions
815 * of PCI Power Management and the related functions.)
816 * @shutdown: Hook into reboot_notifier_list (kernel/sys.c).
817 * Intended to stop any idling DMA operations.
818 * Useful for enabling wake-on-lan (NIC) or changing
819 * the power state of a device before reboot.
820 * e.g. drivers/net/e100.c.
821 * @sriov_configure: Optional driver callback to allow configuration of
822 * number of VFs to enable via sysfs "sriov_numvfs" file.
823 * @err_handler: See Documentation/PCI/pci-error-recovery.rst
824 * @groups: Sysfs attribute groups.
825 * @driver: Driver model structure.
826 * @dynids: List of dynamically added device IDs.
829 struct list_head node;
831 const struct pci_device_id *id_table; /* Must be non-NULL for probe to be called */
832 int (*probe)(struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
833 void (*remove)(struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
834 int (*suspend)(struct pci_dev *dev, pm_message_t state); /* Device suspended */
835 int (*suspend_late)(struct pci_dev *dev, pm_message_t state);
836 int (*resume_early)(struct pci_dev *dev);
837 int (*resume)(struct pci_dev *dev); /* Device woken up */
838 void (*shutdown)(struct pci_dev *dev);
839 int (*sriov_configure)(struct pci_dev *dev, int num_vfs); /* On PF */
840 const struct pci_error_handlers *err_handler;
841 const struct attribute_group **groups;
842 struct device_driver driver;
843 struct pci_dynids dynids;
846 #define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
849 * PCI_DEVICE - macro used to describe a specific PCI device
850 * @vend: the 16 bit PCI Vendor ID
851 * @dev: the 16 bit PCI Device ID
853 * This macro is used to create a struct pci_device_id that matches a
854 * specific device. The subvendor and subdevice fields will be set to
857 #define PCI_DEVICE(vend,dev) \
858 .vendor = (vend), .device = (dev), \
859 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
862 * PCI_DEVICE_SUB - macro used to describe a specific PCI device with subsystem
863 * @vend: the 16 bit PCI Vendor ID
864 * @dev: the 16 bit PCI Device ID
865 * @subvend: the 16 bit PCI Subvendor ID
866 * @subdev: the 16 bit PCI Subdevice ID
868 * This macro is used to create a struct pci_device_id that matches a
869 * specific device with subsystem information.
871 #define PCI_DEVICE_SUB(vend, dev, subvend, subdev) \
872 .vendor = (vend), .device = (dev), \
873 .subvendor = (subvend), .subdevice = (subdev)
876 * PCI_DEVICE_CLASS - macro used to describe a specific PCI device class
877 * @dev_class: the class, subclass, prog-if triple for this device
878 * @dev_class_mask: the class mask for this device
880 * This macro is used to create a struct pci_device_id that matches a
881 * specific PCI class. The vendor, device, subvendor, and subdevice
882 * fields will be set to PCI_ANY_ID.
884 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
885 .class = (dev_class), .class_mask = (dev_class_mask), \
886 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
887 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
890 * PCI_VDEVICE - macro used to describe a specific PCI device in short form
891 * @vend: the vendor name
892 * @dev: the 16 bit PCI Device ID
894 * This macro is used to create a struct pci_device_id that matches a
895 * specific PCI device. The subvendor, and subdevice fields will be set
896 * to PCI_ANY_ID. The macro allows the next field to follow as the device
899 #define PCI_VDEVICE(vend, dev) \
900 .vendor = PCI_VENDOR_ID_##vend, .device = (dev), \
901 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0
904 * PCI_DEVICE_DATA - macro used to describe a specific PCI device in very short form
905 * @vend: the vendor name (without PCI_VENDOR_ID_ prefix)
906 * @dev: the device name (without PCI_DEVICE_ID_<vend>_ prefix)
907 * @data: the driver data to be filled
909 * This macro is used to create a struct pci_device_id that matches a
910 * specific PCI device. The subvendor, and subdevice fields will be set
913 #define PCI_DEVICE_DATA(vend, dev, data) \
914 .vendor = PCI_VENDOR_ID_##vend, .device = PCI_DEVICE_ID_##vend##_##dev, \
915 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0, \
916 .driver_data = (kernel_ulong_t)(data)
919 PCI_REASSIGN_ALL_RSRC = 0x00000001, /* Ignore firmware setup */
920 PCI_REASSIGN_ALL_BUS = 0x00000002, /* Reassign all bus numbers */
921 PCI_PROBE_ONLY = 0x00000004, /* Use existing setup */
922 PCI_CAN_SKIP_ISA_ALIGN = 0x00000008, /* Don't do ISA alignment */
923 PCI_ENABLE_PROC_DOMAINS = 0x00000010, /* Enable domains in /proc */
924 PCI_COMPAT_DOMAIN_0 = 0x00000020, /* ... except domain 0 */
925 PCI_SCAN_ALL_PCIE_DEVS = 0x00000040, /* Scan all, not just dev 0 */
928 /* These external functions are only available when PCI support is enabled */
931 extern unsigned int pci_flags;
933 static inline void pci_set_flags(int flags) { pci_flags = flags; }
934 static inline void pci_add_flags(int flags) { pci_flags |= flags; }
935 static inline void pci_clear_flags(int flags) { pci_flags &= ~flags; }
936 static inline int pci_has_flag(int flag) { return pci_flags & flag; }
938 void pcie_bus_configure_settings(struct pci_bus *bus);
940 enum pcie_bus_config_types {
941 PCIE_BUS_TUNE_OFF, /* Don't touch MPS at all */
942 PCIE_BUS_DEFAULT, /* Ensure MPS matches upstream bridge */
943 PCIE_BUS_SAFE, /* Use largest MPS boot-time devices support */
944 PCIE_BUS_PERFORMANCE, /* Use MPS and MRRS for best performance */
945 PCIE_BUS_PEER2PEER, /* Set MPS = 128 for all devices */
948 extern enum pcie_bus_config_types pcie_bus_config;
950 extern struct bus_type pci_bus_type;
952 /* Do NOT directly access these two variables, unless you are arch-specific PCI
953 * code, or PCI core code. */
954 extern struct list_head pci_root_buses; /* List of all known PCI buses */
955 /* Some device drivers need know if PCI is initiated */
956 int no_pci_devices(void);
958 void pcibios_resource_survey_bus(struct pci_bus *bus);
959 void pcibios_bus_add_device(struct pci_dev *pdev);
960 void pcibios_add_bus(struct pci_bus *bus);
961 void pcibios_remove_bus(struct pci_bus *bus);
962 void pcibios_fixup_bus(struct pci_bus *);
963 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
964 /* Architecture-specific versions may override this (weak) */
965 char *pcibios_setup(char *str);
967 /* Used only when drivers/pci/setup.c is used */
968 resource_size_t pcibios_align_resource(void *, const struct resource *,
972 /* Weak but can be overriden by arch */
973 void pci_fixup_cardbus(struct pci_bus *);
975 /* Generic PCI functions used internally */
977 void pcibios_resource_to_bus(struct pci_bus *bus, struct pci_bus_region *region,
978 struct resource *res);
979 void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
980 struct pci_bus_region *region);
981 void pcibios_scan_specific_bus(int busn);
982 struct pci_bus *pci_find_bus(int domain, int busnr);
983 void pci_bus_add_devices(const struct pci_bus *bus);
984 struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
985 struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
986 struct pci_ops *ops, void *sysdata,
987 struct list_head *resources);
988 int pci_host_probe(struct pci_host_bridge *bridge);
989 int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
990 int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax);
991 void pci_bus_release_busn_res(struct pci_bus *b);
992 struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
993 struct pci_ops *ops, void *sysdata,
994 struct list_head *resources);
995 int pci_scan_root_bus_bridge(struct pci_host_bridge *bridge);
996 struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
998 void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
999 struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
1001 struct hotplug_slot *hotplug);
1002 void pci_destroy_slot(struct pci_slot *slot);
1004 void pci_dev_assign_slot(struct pci_dev *dev);
1006 static inline void pci_dev_assign_slot(struct pci_dev *dev) { }
1008 int pci_scan_slot(struct pci_bus *bus, int devfn);
1009 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
1010 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
1011 unsigned int pci_scan_child_bus(struct pci_bus *bus);
1012 void pci_bus_add_device(struct pci_dev *dev);
1013 void pci_read_bridge_bases(struct pci_bus *child);
1014 struct resource *pci_find_parent_resource(const struct pci_dev *dev,
1015 struct resource *res);
1016 struct pci_dev *pci_find_pcie_root_port(struct pci_dev *dev);
1017 u8 pci_swizzle_interrupt_pin(const struct pci_dev *dev, u8 pin);
1018 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
1019 u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
1020 struct pci_dev *pci_dev_get(struct pci_dev *dev);
1021 void pci_dev_put(struct pci_dev *dev);
1022 void pci_remove_bus(struct pci_bus *b);
1023 void pci_stop_and_remove_bus_device(struct pci_dev *dev);
1024 void pci_stop_and_remove_bus_device_locked(struct pci_dev *dev);
1025 void pci_stop_root_bus(struct pci_bus *bus);
1026 void pci_remove_root_bus(struct pci_bus *bus);
1027 void pci_setup_cardbus(struct pci_bus *bus);
1028 void pcibios_setup_bridge(struct pci_bus *bus, unsigned long type);
1029 void pci_sort_breadthfirst(void);
1030 #define dev_is_pci(d) ((d)->bus == &pci_bus_type)
1031 #define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false))
1033 /* Generic PCI functions exported to card drivers */
1035 enum pci_lost_interrupt_reason {
1036 PCI_LOST_IRQ_NO_INFORMATION = 0,
1037 PCI_LOST_IRQ_DISABLE_MSI,
1038 PCI_LOST_IRQ_DISABLE_MSIX,
1039 PCI_LOST_IRQ_DISABLE_ACPI,
1041 enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *dev);
1042 int pci_find_capability(struct pci_dev *dev, int cap);
1043 int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
1044 int pci_find_ext_capability(struct pci_dev *dev, int cap);
1045 int pci_find_next_ext_capability(struct pci_dev *dev, int pos, int cap);
1046 int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
1047 int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
1048 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
1050 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
1051 struct pci_dev *from);
1052 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
1053 unsigned int ss_vendor, unsigned int ss_device,
1054 struct pci_dev *from);
1055 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
1056 struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
1057 unsigned int devfn);
1058 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
1059 int pci_dev_present(const struct pci_device_id *ids);
1061 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
1062 int where, u8 *val);
1063 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
1064 int where, u16 *val);
1065 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
1066 int where, u32 *val);
1067 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
1069 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
1070 int where, u16 val);
1071 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
1072 int where, u32 val);
1074 int pci_generic_config_read(struct pci_bus *bus, unsigned int devfn,
1075 int where, int size, u32 *val);
1076 int pci_generic_config_write(struct pci_bus *bus, unsigned int devfn,
1077 int where, int size, u32 val);
1078 int pci_generic_config_read32(struct pci_bus *bus, unsigned int devfn,
1079 int where, int size, u32 *val);
1080 int pci_generic_config_write32(struct pci_bus *bus, unsigned int devfn,
1081 int where, int size, u32 val);
1083 struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
1085 int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val);
1086 int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val);
1087 int pci_read_config_dword(const struct pci_dev *dev, int where, u32 *val);
1088 int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val);
1089 int pci_write_config_word(const struct pci_dev *dev, int where, u16 val);
1090 int pci_write_config_dword(const struct pci_dev *dev, int where, u32 val);
1092 int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val);
1093 int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val);
1094 int pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val);
1095 int pcie_capability_write_dword(struct pci_dev *dev, int pos, u32 val);
1096 int pcie_capability_clear_and_set_word(struct pci_dev *dev, int pos,
1097 u16 clear, u16 set);
1098 int pcie_capability_clear_and_set_dword(struct pci_dev *dev, int pos,
1099 u32 clear, u32 set);
1101 static inline int pcie_capability_set_word(struct pci_dev *dev, int pos,
1104 return pcie_capability_clear_and_set_word(dev, pos, 0, set);
1107 static inline int pcie_capability_set_dword(struct pci_dev *dev, int pos,
1110 return pcie_capability_clear_and_set_dword(dev, pos, 0, set);
1113 static inline int pcie_capability_clear_word(struct pci_dev *dev, int pos,
1116 return pcie_capability_clear_and_set_word(dev, pos, clear, 0);
1119 static inline int pcie_capability_clear_dword(struct pci_dev *dev, int pos,
1122 return pcie_capability_clear_and_set_dword(dev, pos, clear, 0);
1125 /* User-space driven config access */
1126 int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
1127 int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
1128 int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val);
1129 int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val);
1130 int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val);
1131 int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val);
1133 int __must_check pci_enable_device(struct pci_dev *dev);
1134 int __must_check pci_enable_device_io(struct pci_dev *dev);
1135 int __must_check pci_enable_device_mem(struct pci_dev *dev);
1136 int __must_check pci_reenable_device(struct pci_dev *);
1137 int __must_check pcim_enable_device(struct pci_dev *pdev);
1138 void pcim_pin_device(struct pci_dev *pdev);
1140 static inline bool pci_intx_mask_supported(struct pci_dev *pdev)
1143 * INTx masking is supported if PCI_COMMAND_INTX_DISABLE is
1144 * writable and no quirk has marked the feature broken.
1146 return !pdev->broken_intx_masking;
1149 static inline int pci_is_enabled(struct pci_dev *pdev)
1151 return (atomic_read(&pdev->enable_cnt) > 0);
1154 static inline int pci_is_managed(struct pci_dev *pdev)
1156 return pdev->is_managed;
1159 void pci_disable_device(struct pci_dev *dev);
1161 extern unsigned int pcibios_max_latency;
1162 void pci_set_master(struct pci_dev *dev);
1163 void pci_clear_master(struct pci_dev *dev);
1165 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
1166 int pci_set_cacheline_size(struct pci_dev *dev);
1167 #define HAVE_PCI_SET_MWI
1168 int __must_check pci_set_mwi(struct pci_dev *dev);
1169 int __must_check pcim_set_mwi(struct pci_dev *dev);
1170 int pci_try_set_mwi(struct pci_dev *dev);
1171 void pci_clear_mwi(struct pci_dev *dev);
1172 void pci_intx(struct pci_dev *dev, int enable);
1173 bool pci_check_and_mask_intx(struct pci_dev *dev);
1174 bool pci_check_and_unmask_intx(struct pci_dev *dev);
1175 int pci_wait_for_pending(struct pci_dev *dev, int pos, u16 mask);
1176 int pci_wait_for_pending_transaction(struct pci_dev *dev);
1177 int pcix_get_max_mmrbc(struct pci_dev *dev);
1178 int pcix_get_mmrbc(struct pci_dev *dev);
1179 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
1180 int pcie_get_readrq(struct pci_dev *dev);
1181 int pcie_set_readrq(struct pci_dev *dev, int rq);
1182 int pcie_get_mps(struct pci_dev *dev);
1183 int pcie_set_mps(struct pci_dev *dev, int mps);
1184 u32 pcie_bandwidth_available(struct pci_dev *dev, struct pci_dev **limiting_dev,
1185 enum pci_bus_speed *speed,
1186 enum pcie_link_width *width);
1187 void pcie_print_link_status(struct pci_dev *dev);
1188 bool pcie_has_flr(struct pci_dev *dev);
1189 int pcie_flr(struct pci_dev *dev);
1190 int __pci_reset_function_locked(struct pci_dev *dev);
1191 int pci_reset_function(struct pci_dev *dev);
1192 int pci_reset_function_locked(struct pci_dev *dev);
1193 int pci_try_reset_function(struct pci_dev *dev);
1194 int pci_probe_reset_slot(struct pci_slot *slot);
1195 int pci_probe_reset_bus(struct pci_bus *bus);
1196 int pci_reset_bus(struct pci_dev *dev);
1197 void pci_reset_secondary_bus(struct pci_dev *dev);
1198 void pcibios_reset_secondary_bus(struct pci_dev *dev);
1199 void pci_update_resource(struct pci_dev *dev, int resno);
1200 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
1201 int __must_check pci_reassign_resource(struct pci_dev *dev, int i, resource_size_t add_size, resource_size_t align);
1202 void pci_release_resource(struct pci_dev *dev, int resno);
1203 int __must_check pci_resize_resource(struct pci_dev *dev, int i, int size);
1204 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
1205 bool pci_device_is_present(struct pci_dev *pdev);
1206 void pci_ignore_hotplug(struct pci_dev *dev);
1208 int __printf(6, 7) pci_request_irq(struct pci_dev *dev, unsigned int nr,
1209 irq_handler_t handler, irq_handler_t thread_fn, void *dev_id,
1210 const char *fmt, ...);
1211 void pci_free_irq(struct pci_dev *dev, unsigned int nr, void *dev_id);
1213 /* ROM control related routines */
1214 int pci_enable_rom(struct pci_dev *pdev);
1215 void pci_disable_rom(struct pci_dev *pdev);
1216 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
1217 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
1218 void __iomem __must_check *pci_platform_rom(struct pci_dev *pdev, size_t *size);
1220 /* Power management related routines */
1221 int pci_save_state(struct pci_dev *dev);
1222 void pci_restore_state(struct pci_dev *dev);
1223 struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev);
1224 int pci_load_saved_state(struct pci_dev *dev,
1225 struct pci_saved_state *state);
1226 int pci_load_and_free_saved_state(struct pci_dev *dev,
1227 struct pci_saved_state **state);
1228 struct pci_cap_saved_state *pci_find_saved_cap(struct pci_dev *dev, char cap);
1229 struct pci_cap_saved_state *pci_find_saved_ext_cap(struct pci_dev *dev,
1231 int pci_add_cap_save_buffer(struct pci_dev *dev, char cap, unsigned int size);
1232 int pci_add_ext_cap_save_buffer(struct pci_dev *dev,
1233 u16 cap, unsigned int size);
1234 int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state);
1235 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
1236 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
1237 bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
1238 void pci_pme_active(struct pci_dev *dev, bool enable);
1239 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable);
1240 int pci_wake_from_d3(struct pci_dev *dev, bool enable);
1241 int pci_prepare_to_sleep(struct pci_dev *dev);
1242 int pci_back_from_sleep(struct pci_dev *dev);
1243 bool pci_dev_run_wake(struct pci_dev *dev);
1244 bool pci_check_pme_status(struct pci_dev *dev);
1245 void pci_pme_wakeup_bus(struct pci_bus *bus);
1246 void pci_d3cold_enable(struct pci_dev *dev);
1247 void pci_d3cold_disable(struct pci_dev *dev);
1248 bool pcie_relaxed_ordering_enabled(struct pci_dev *dev);
1249 void pci_wakeup_bus(struct pci_bus *bus);
1250 void pci_bus_set_current_state(struct pci_bus *bus, pci_power_t state);
1252 /* PCI Virtual Channel */
1253 int pci_save_vc_state(struct pci_dev *dev);
1254 void pci_restore_vc_state(struct pci_dev *dev);
1255 void pci_allocate_vc_save_buffers(struct pci_dev *dev);
1257 /* For use by arch with custom probe code */
1258 void set_pcie_port_type(struct pci_dev *pdev);
1259 void set_pcie_hotplug_bridge(struct pci_dev *pdev);
1261 /* Functions for PCI Hotplug drivers to use */
1262 int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
1263 unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge);
1264 unsigned int pci_rescan_bus(struct pci_bus *bus);
1265 void pci_lock_rescan_remove(void);
1266 void pci_unlock_rescan_remove(void);
1268 /* Vital Product Data routines */
1269 ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
1270 ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
1271 int pci_set_vpd_size(struct pci_dev *dev, size_t len);
1273 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
1274 resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx);
1275 void pci_bus_assign_resources(const struct pci_bus *bus);
1276 void pci_bus_claim_resources(struct pci_bus *bus);
1277 void pci_bus_size_bridges(struct pci_bus *bus);
1278 int pci_claim_resource(struct pci_dev *, int);
1279 int pci_claim_bridge_resource(struct pci_dev *bridge, int i);
1280 void pci_assign_unassigned_resources(void);
1281 void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
1282 void pci_assign_unassigned_bus_resources(struct pci_bus *bus);
1283 void pci_assign_unassigned_root_bus_resources(struct pci_bus *bus);
1284 int pci_reassign_bridge_resources(struct pci_dev *bridge, unsigned long type);
1285 void pdev_enable_device(struct pci_dev *);
1286 int pci_enable_resources(struct pci_dev *, int mask);
1287 void pci_assign_irq(struct pci_dev *dev);
1288 struct resource *pci_find_resource(struct pci_dev *dev, struct resource *res);
1289 #define HAVE_PCI_REQ_REGIONS 2
1290 int __must_check pci_request_regions(struct pci_dev *, const char *);
1291 int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
1292 void pci_release_regions(struct pci_dev *);
1293 int __must_check pci_request_region(struct pci_dev *, int, const char *);
1294 void pci_release_region(struct pci_dev *, int);
1295 int pci_request_selected_regions(struct pci_dev *, int, const char *);
1296 int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
1297 void pci_release_selected_regions(struct pci_dev *, int);
1299 /* drivers/pci/bus.c */
1300 struct pci_bus *pci_bus_get(struct pci_bus *bus);
1301 void pci_bus_put(struct pci_bus *bus);
1302 void pci_add_resource(struct list_head *resources, struct resource *res);
1303 void pci_add_resource_offset(struct list_head *resources, struct resource *res,
1304 resource_size_t offset);
1305 void pci_free_resource_list(struct list_head *resources);
1306 void pci_bus_add_resource(struct pci_bus *bus, struct resource *res,
1307 unsigned int flags);
1308 struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n);
1309 void pci_bus_remove_resources(struct pci_bus *bus);
1310 int devm_request_pci_bus_resources(struct device *dev,
1311 struct list_head *resources);
1313 /* Temporary until new and working PCI SBR API in place */
1314 int pci_bridge_secondary_bus_reset(struct pci_dev *dev);
1316 #define pci_bus_for_each_resource(bus, res, i) \
1318 (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
1321 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
1322 struct resource *res, resource_size_t size,
1323 resource_size_t align, resource_size_t min,
1324 unsigned long type_mask,
1325 resource_size_t (*alignf)(void *,
1326 const struct resource *,
1332 int pci_register_io_range(struct fwnode_handle *fwnode, phys_addr_t addr,
1333 resource_size_t size);
1334 unsigned long pci_address_to_pio(phys_addr_t addr);
1335 phys_addr_t pci_pio_to_address(unsigned long pio);
1336 int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr);
1337 int devm_pci_remap_iospace(struct device *dev, const struct resource *res,
1338 phys_addr_t phys_addr);
1339 void pci_unmap_iospace(struct resource *res);
1340 void __iomem *devm_pci_remap_cfgspace(struct device *dev,
1341 resource_size_t offset,
1342 resource_size_t size);
1343 void __iomem *devm_pci_remap_cfg_resource(struct device *dev,
1344 struct resource *res);
1346 static inline pci_bus_addr_t pci_bus_address(struct pci_dev *pdev, int bar)
1348 struct pci_bus_region region;
1350 pcibios_resource_to_bus(pdev->bus, ®ion, &pdev->resource[bar]);
1351 return region.start;
1354 /* Proper probing supporting hot-pluggable devices */
1355 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
1356 const char *mod_name);
1358 /* pci_register_driver() must be a macro so KBUILD_MODNAME can be expanded */
1359 #define pci_register_driver(driver) \
1360 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
1362 void pci_unregister_driver(struct pci_driver *dev);
1365 * module_pci_driver() - Helper macro for registering a PCI driver
1366 * @__pci_driver: pci_driver struct
1368 * Helper macro for PCI drivers which do not do anything special in module
1369 * init/exit. This eliminates a lot of boilerplate. Each module may only
1370 * use this macro once, and calling it replaces module_init() and module_exit()
1372 #define module_pci_driver(__pci_driver) \
1373 module_driver(__pci_driver, pci_register_driver, pci_unregister_driver)
1376 * builtin_pci_driver() - Helper macro for registering a PCI driver
1377 * @__pci_driver: pci_driver struct
1379 * Helper macro for PCI drivers which do not do anything special in their
1380 * init code. This eliminates a lot of boilerplate. Each driver may only
1381 * use this macro once, and calling it replaces device_initcall(...)
1383 #define builtin_pci_driver(__pci_driver) \
1384 builtin_driver(__pci_driver, pci_register_driver)
1386 struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
1387 int pci_add_dynid(struct pci_driver *drv,
1388 unsigned int vendor, unsigned int device,
1389 unsigned int subvendor, unsigned int subdevice,
1390 unsigned int class, unsigned int class_mask,
1391 unsigned long driver_data);
1392 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
1393 struct pci_dev *dev);
1394 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
1397 void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
1399 int pci_cfg_space_size(struct pci_dev *dev);
1400 unsigned char pci_bus_max_busnr(struct pci_bus *bus);
1401 void pci_setup_bridge(struct pci_bus *bus);
1402 resource_size_t pcibios_window_alignment(struct pci_bus *bus,
1403 unsigned long type);
1405 #define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
1406 #define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)
1408 int pci_set_vga_state(struct pci_dev *pdev, bool decode,
1409 unsigned int command_bits, u32 flags);
1411 #define PCI_IRQ_LEGACY (1 << 0) /* Allow legacy interrupts */
1412 #define PCI_IRQ_MSI (1 << 1) /* Allow MSI interrupts */
1413 #define PCI_IRQ_MSIX (1 << 2) /* Allow MSI-X interrupts */
1414 #define PCI_IRQ_AFFINITY (1 << 3) /* Auto-assign affinity */
1417 * Virtual interrupts allow for more interrupts to be allocated
1418 * than the device has interrupts for. These are not programmed
1419 * into the device's MSI-X table and must be handled by some
1420 * other driver means.
1422 #define PCI_IRQ_VIRTUAL (1 << 4)
1424 #define PCI_IRQ_ALL_TYPES \
1425 (PCI_IRQ_LEGACY | PCI_IRQ_MSI | PCI_IRQ_MSIX)
1427 /* kmem_cache style wrapper around pci_alloc_consistent() */
1429 #include <linux/dmapool.h>
1431 #define pci_pool dma_pool
1432 #define pci_pool_create(name, pdev, size, align, allocation) \
1433 dma_pool_create(name, &pdev->dev, size, align, allocation)
1434 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
1435 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
1436 #define pci_pool_zalloc(pool, flags, handle) \
1437 dma_pool_zalloc(pool, flags, handle)
1438 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
1441 u32 vector; /* Kernel uses to write allocated vector */
1442 u16 entry; /* Driver uses to specify entry, OS writes */
1445 #ifdef CONFIG_PCI_MSI
1446 int pci_msi_vec_count(struct pci_dev *dev);
1447 void pci_disable_msi(struct pci_dev *dev);
1448 int pci_msix_vec_count(struct pci_dev *dev);
1449 void pci_disable_msix(struct pci_dev *dev);
1450 void pci_restore_msi_state(struct pci_dev *dev);
1451 int pci_msi_enabled(void);
1452 int pci_enable_msi(struct pci_dev *dev);
1453 int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
1454 int minvec, int maxvec);
1455 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1456 struct msix_entry *entries, int nvec)
1458 int rc = pci_enable_msix_range(dev, entries, nvec, nvec);
1463 int pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1464 unsigned int max_vecs, unsigned int flags,
1465 struct irq_affinity *affd);
1467 void pci_free_irq_vectors(struct pci_dev *dev);
1468 int pci_irq_vector(struct pci_dev *dev, unsigned int nr);
1469 const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev, int vec);
1470 int pci_irq_get_node(struct pci_dev *pdev, int vec);
1473 static inline int pci_msi_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1474 static inline void pci_disable_msi(struct pci_dev *dev) { }
1475 static inline int pci_msix_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1476 static inline void pci_disable_msix(struct pci_dev *dev) { }
1477 static inline void pci_restore_msi_state(struct pci_dev *dev) { }
1478 static inline int pci_msi_enabled(void) { return 0; }
1479 static inline int pci_enable_msi(struct pci_dev *dev)
1481 static inline int pci_enable_msix_range(struct pci_dev *dev,
1482 struct msix_entry *entries, int minvec, int maxvec)
1484 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1485 struct msix_entry *entries, int nvec)
1489 pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1490 unsigned int max_vecs, unsigned int flags,
1491 struct irq_affinity *aff_desc)
1493 if ((flags & PCI_IRQ_LEGACY) && min_vecs == 1 && dev->irq)
1498 static inline void pci_free_irq_vectors(struct pci_dev *dev)
1502 static inline int pci_irq_vector(struct pci_dev *dev, unsigned int nr)
1504 if (WARN_ON_ONCE(nr > 0))
1508 static inline const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev,
1511 return cpu_possible_mask;
1514 static inline int pci_irq_get_node(struct pci_dev *pdev, int vec)
1516 return first_online_node;
1521 pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs,
1522 unsigned int max_vecs, unsigned int flags)
1524 return pci_alloc_irq_vectors_affinity(dev, min_vecs, max_vecs, flags,
1529 * pci_irqd_intx_xlate() - Translate PCI INTx value to an IRQ domain hwirq
1530 * @d: the INTx IRQ domain
1531 * @node: the DT node for the device whose interrupt we're translating
1532 * @intspec: the interrupt specifier data from the DT
1533 * @intsize: the number of entries in @intspec
1534 * @out_hwirq: pointer at which to write the hwirq number
1535 * @out_type: pointer at which to write the interrupt type
1537 * Translate a PCI INTx interrupt number from device tree in the range 1-4, as
1538 * stored in the standard PCI_INTERRUPT_PIN register, to a value in the range
1539 * 0-3 suitable for use in a 4 entry IRQ domain. That is, subtract one from the
1540 * INTx value to obtain the hwirq number.
1542 * Returns 0 on success, or -EINVAL if the interrupt specifier is out of range.
1544 static inline int pci_irqd_intx_xlate(struct irq_domain *d,
1545 struct device_node *node,
1547 unsigned int intsize,
1548 unsigned long *out_hwirq,
1549 unsigned int *out_type)
1551 const u32 intx = intspec[0];
1553 if (intx < PCI_INTERRUPT_INTA || intx > PCI_INTERRUPT_INTD)
1556 *out_hwirq = intx - PCI_INTERRUPT_INTA;
1560 #ifdef CONFIG_PCIEPORTBUS
1561 extern bool pcie_ports_disabled;
1562 extern bool pcie_ports_native;
1564 #define pcie_ports_disabled true
1565 #define pcie_ports_native false
1568 #ifdef CONFIG_PCIEASPM
1569 bool pcie_aspm_support_enabled(void);
1571 static inline bool pcie_aspm_support_enabled(void) { return false; }
1574 #ifdef CONFIG_PCIEAER
1575 bool pci_aer_available(void);
1577 static inline bool pci_aer_available(void) { return false; }
1580 #ifdef CONFIG_PCIE_ECRC
1581 void pcie_set_ecrc_checking(struct pci_dev *dev);
1582 void pcie_ecrc_get_policy(char *str);
1584 static inline void pcie_set_ecrc_checking(struct pci_dev *dev) { }
1585 static inline void pcie_ecrc_get_policy(char *str) { }
1588 bool pci_ats_disabled(void);
1590 #ifdef CONFIG_PCIE_PTM
1591 int pci_enable_ptm(struct pci_dev *dev, u8 *granularity);
1593 static inline int pci_enable_ptm(struct pci_dev *dev, u8 *granularity)
1597 void pci_cfg_access_lock(struct pci_dev *dev);
1598 bool pci_cfg_access_trylock(struct pci_dev *dev);
1599 void pci_cfg_access_unlock(struct pci_dev *dev);
1602 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
1603 * a PCI domain is defined to be a set of PCI buses which share
1604 * configuration space.
1606 #ifdef CONFIG_PCI_DOMAINS
1607 extern int pci_domains_supported;
1609 enum { pci_domains_supported = 0 };
1610 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1611 static inline int pci_proc_domain(struct pci_bus *bus) { return 0; }
1612 #endif /* CONFIG_PCI_DOMAINS */
1615 * Generic implementation for PCI domain support. If your
1616 * architecture does not need custom management of PCI
1617 * domains then this implementation will be used
1619 #ifdef CONFIG_PCI_DOMAINS_GENERIC
1620 static inline int pci_domain_nr(struct pci_bus *bus)
1622 return bus->domain_nr;
1625 int acpi_pci_bus_find_domain_nr(struct pci_bus *bus);
1627 static inline int acpi_pci_bus_find_domain_nr(struct pci_bus *bus)
1630 int pci_bus_find_domain_nr(struct pci_bus *bus, struct device *parent);
1633 /* Some architectures require additional setup to direct VGA traffic */
1634 typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
1635 unsigned int command_bits, u32 flags);
1636 void pci_register_set_vga_state(arch_set_vga_state_t func);
1639 pci_request_io_regions(struct pci_dev *pdev, const char *name)
1641 return pci_request_selected_regions(pdev,
1642 pci_select_bars(pdev, IORESOURCE_IO), name);
1646 pci_release_io_regions(struct pci_dev *pdev)
1648 return pci_release_selected_regions(pdev,
1649 pci_select_bars(pdev, IORESOURCE_IO));
1653 pci_request_mem_regions(struct pci_dev *pdev, const char *name)
1655 return pci_request_selected_regions(pdev,
1656 pci_select_bars(pdev, IORESOURCE_MEM), name);
1660 pci_release_mem_regions(struct pci_dev *pdev)
1662 return pci_release_selected_regions(pdev,
1663 pci_select_bars(pdev, IORESOURCE_MEM));
1666 #else /* CONFIG_PCI is not enabled */
1668 static inline void pci_set_flags(int flags) { }
1669 static inline void pci_add_flags(int flags) { }
1670 static inline void pci_clear_flags(int flags) { }
1671 static inline int pci_has_flag(int flag) { return 0; }
1674 * If the system does not have PCI, clearly these return errors. Define
1675 * these as simple inline functions to avoid hair in drivers.
1677 #define _PCI_NOP(o, s, t) \
1678 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
1680 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
1682 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
1683 _PCI_NOP(o, word, u16 x) \
1684 _PCI_NOP(o, dword, u32 x)
1685 _PCI_NOP_ALL(read, *)
1686 _PCI_NOP_ALL(write,)
1688 static inline struct pci_dev *pci_get_device(unsigned int vendor,
1689 unsigned int device,
1690 struct pci_dev *from)
1693 static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
1694 unsigned int device,
1695 unsigned int ss_vendor,
1696 unsigned int ss_device,
1697 struct pci_dev *from)
1700 static inline struct pci_dev *pci_get_class(unsigned int class,
1701 struct pci_dev *from)
1704 #define pci_dev_present(ids) (0)
1705 #define no_pci_devices() (1)
1706 #define pci_dev_put(dev) do { } while (0)
1708 static inline void pci_set_master(struct pci_dev *dev) { }
1709 static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
1710 static inline void pci_disable_device(struct pci_dev *dev) { }
1711 static inline int pci_assign_resource(struct pci_dev *dev, int i)
1713 static inline int __pci_register_driver(struct pci_driver *drv,
1714 struct module *owner)
1716 static inline int pci_register_driver(struct pci_driver *drv)
1718 static inline void pci_unregister_driver(struct pci_driver *drv) { }
1719 static inline int pci_find_capability(struct pci_dev *dev, int cap)
1721 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
1724 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
1727 /* Power management related routines */
1728 static inline int pci_save_state(struct pci_dev *dev) { return 0; }
1729 static inline void pci_restore_state(struct pci_dev *dev) { }
1730 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
1732 static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable)
1734 static inline pci_power_t pci_choose_state(struct pci_dev *dev,
1737 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1741 static inline struct resource *pci_find_resource(struct pci_dev *dev,
1742 struct resource *res)
1744 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
1746 static inline void pci_release_regions(struct pci_dev *dev) { }
1748 static inline unsigned long pci_address_to_pio(phys_addr_t addr) { return -1; }
1750 static inline void pci_block_cfg_access(struct pci_dev *dev) { }
1751 static inline int pci_block_cfg_access_in_atomic(struct pci_dev *dev)
1753 static inline void pci_unblock_cfg_access(struct pci_dev *dev) { }
1755 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
1757 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
1760 static inline struct pci_dev *pci_get_domain_bus_and_slot(int domain,
1761 unsigned int bus, unsigned int devfn)
1764 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1765 static inline struct pci_dev *pci_dev_get(struct pci_dev *dev) { return NULL; }
1767 #define dev_is_pci(d) (false)
1768 #define dev_is_pf(d) (false)
1769 static inline bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags)
1771 static inline int pci_irqd_intx_xlate(struct irq_domain *d,
1772 struct device_node *node,
1774 unsigned int intsize,
1775 unsigned long *out_hwirq,
1776 unsigned int *out_type)
1779 static inline const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
1780 struct pci_dev *dev)
1782 static inline bool pci_ats_disabled(void) { return true; }
1783 #endif /* CONFIG_PCI */
1785 #ifdef CONFIG_PCI_ATS
1786 /* Address Translation Service */
1787 void pci_ats_init(struct pci_dev *dev);
1788 int pci_enable_ats(struct pci_dev *dev, int ps);
1789 void pci_disable_ats(struct pci_dev *dev);
1790 int pci_ats_queue_depth(struct pci_dev *dev);
1791 int pci_ats_page_aligned(struct pci_dev *dev);
1793 static inline void pci_ats_init(struct pci_dev *d) { }
1794 static inline int pci_enable_ats(struct pci_dev *d, int ps) { return -ENODEV; }
1795 static inline void pci_disable_ats(struct pci_dev *d) { }
1796 static inline int pci_ats_queue_depth(struct pci_dev *d) { return -ENODEV; }
1797 static inline int pci_ats_page_aligned(struct pci_dev *dev) { return 0; }
1800 /* Include architecture-dependent settings and functions */
1802 #include <asm/pci.h>
1804 /* These two functions provide almost identical functionality. Depennding
1805 * on the architecture, one will be implemented as a wrapper around the
1806 * other (in drivers/pci/mmap.c).
1808 * pci_mmap_resource_range() maps a specific BAR, and vm->vm_pgoff
1809 * is expected to be an offset within that region.
1811 * pci_mmap_page_range() is the legacy architecture-specific interface,
1812 * which accepts a "user visible" resource address converted by
1813 * pci_resource_to_user(), as used in the legacy mmap() interface in
1816 int pci_mmap_resource_range(struct pci_dev *dev, int bar,
1817 struct vm_area_struct *vma,
1818 enum pci_mmap_state mmap_state, int write_combine);
1819 int pci_mmap_page_range(struct pci_dev *pdev, int bar,
1820 struct vm_area_struct *vma,
1821 enum pci_mmap_state mmap_state, int write_combine);
1823 #ifndef arch_can_pci_mmap_wc
1824 #define arch_can_pci_mmap_wc() 0
1827 #ifndef arch_can_pci_mmap_io
1828 #define arch_can_pci_mmap_io() 0
1829 #define pci_iobar_pfn(pdev, bar, vma) (-EINVAL)
1831 int pci_iobar_pfn(struct pci_dev *pdev, int bar, struct vm_area_struct *vma);
1834 #ifndef pci_root_bus_fwnode
1835 #define pci_root_bus_fwnode(bus) NULL
1839 * These helpers provide future and backwards compatibility
1840 * for accessing popular PCI BAR info
1842 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
1843 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
1844 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
1845 #define pci_resource_len(dev,bar) \
1846 ((pci_resource_start((dev), (bar)) == 0 && \
1847 pci_resource_end((dev), (bar)) == \
1848 pci_resource_start((dev), (bar))) ? 0 : \
1850 (pci_resource_end((dev), (bar)) - \
1851 pci_resource_start((dev), (bar)) + 1))
1854 * Similar to the helpers above, these manipulate per-pci_dev
1855 * driver-specific data. They are really just a wrapper around
1856 * the generic device structure functions of these calls.
1858 static inline void *pci_get_drvdata(struct pci_dev *pdev)
1860 return dev_get_drvdata(&pdev->dev);
1863 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
1865 dev_set_drvdata(&pdev->dev, data);
1868 static inline const char *pci_name(const struct pci_dev *pdev)
1870 return dev_name(&pdev->dev);
1875 * Some archs don't want to expose struct resource to userland as-is
1876 * in sysfs and /proc
1878 #ifdef HAVE_ARCH_PCI_RESOURCE_TO_USER
1879 void pci_resource_to_user(const struct pci_dev *dev, int bar,
1880 const struct resource *rsrc,
1881 resource_size_t *start, resource_size_t *end);
1883 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
1884 const struct resource *rsrc, resource_size_t *start,
1885 resource_size_t *end)
1887 *start = rsrc->start;
1890 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
1894 * The world is not perfect and supplies us with broken PCI devices.
1895 * For at least a part of these bugs we need a work-around, so both
1896 * generic (drivers/pci/quirks.c) and per-architecture code can define
1897 * fixup hooks to be called for particular buggy devices.
1901 u16 vendor; /* Or PCI_ANY_ID */
1902 u16 device; /* Or PCI_ANY_ID */
1903 u32 class; /* Or PCI_ANY_ID */
1904 unsigned int class_shift; /* should be 0, 8, 16 */
1905 #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
1908 void (*hook)(struct pci_dev *dev);
1912 enum pci_fixup_pass {
1913 pci_fixup_early, /* Before probing BARs */
1914 pci_fixup_header, /* After reading configuration header */
1915 pci_fixup_final, /* Final phase of device fixups */
1916 pci_fixup_enable, /* pci_enable_device() time */
1917 pci_fixup_resume, /* pci_device_resume() */
1918 pci_fixup_suspend, /* pci_device_suspend() */
1919 pci_fixup_resume_early, /* pci_device_resume_early() */
1920 pci_fixup_suspend_late, /* pci_device_suspend_late() */
1923 #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
1924 #define __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1925 class_shift, hook) \
1926 __ADDRESSABLE(hook) \
1927 asm(".section " #sec ", \"a\" \n" \
1929 ".short " #vendor ", " #device " \n" \
1930 ".long " #class ", " #class_shift " \n" \
1931 ".long " #hook " - . \n" \
1933 #define DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1934 class_shift, hook) \
1935 __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1938 /* Anonymous variables would be nice... */
1939 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \
1940 class_shift, hook) \
1941 static const struct pci_fixup __PASTE(__pci_fixup_##name,__LINE__) __used \
1942 __attribute__((__section__(#section), aligned((sizeof(void *))))) \
1943 = { vendor, device, class, class_shift, hook };
1946 #define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class, \
1947 class_shift, hook) \
1948 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1949 hook, vendor, device, class, class_shift, hook)
1950 #define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class, \
1951 class_shift, hook) \
1952 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1953 hook, vendor, device, class, class_shift, hook)
1954 #define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class, \
1955 class_shift, hook) \
1956 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1957 hook, vendor, device, class, class_shift, hook)
1958 #define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class, \
1959 class_shift, hook) \
1960 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1961 hook, vendor, device, class, class_shift, hook)
1962 #define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class, \
1963 class_shift, hook) \
1964 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1965 resume##hook, vendor, device, class, class_shift, hook)
1966 #define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class, \
1967 class_shift, hook) \
1968 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1969 resume_early##hook, vendor, device, class, class_shift, hook)
1970 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class, \
1971 class_shift, hook) \
1972 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1973 suspend##hook, vendor, device, class, class_shift, hook)
1974 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND_LATE(vendor, device, class, \
1975 class_shift, hook) \
1976 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
1977 suspend_late##hook, vendor, device, class, class_shift, hook)
1979 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
1980 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1981 hook, vendor, device, PCI_ANY_ID, 0, hook)
1982 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
1983 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1984 hook, vendor, device, PCI_ANY_ID, 0, hook)
1985 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
1986 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1987 hook, vendor, device, PCI_ANY_ID, 0, hook)
1988 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
1989 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1990 hook, vendor, device, PCI_ANY_ID, 0, hook)
1991 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
1992 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1993 resume##hook, vendor, device, PCI_ANY_ID, 0, hook)
1994 #define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
1995 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1996 resume_early##hook, vendor, device, PCI_ANY_ID, 0, hook)
1997 #define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
1998 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1999 suspend##hook, vendor, device, PCI_ANY_ID, 0, hook)
2000 #define DECLARE_PCI_FIXUP_SUSPEND_LATE(vendor, device, hook) \
2001 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
2002 suspend_late##hook, vendor, device, PCI_ANY_ID, 0, hook)
2004 #ifdef CONFIG_PCI_QUIRKS
2005 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
2007 static inline void pci_fixup_device(enum pci_fixup_pass pass,
2008 struct pci_dev *dev) { }
2011 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
2012 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
2013 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
2014 int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name);
2015 int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
2017 void pcim_iounmap_regions(struct pci_dev *pdev, int mask);
2019 extern int pci_pci_problems;
2020 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
2021 #define PCIPCI_TRITON 2
2022 #define PCIPCI_NATOMA 4
2023 #define PCIPCI_VIAETBF 8
2024 #define PCIPCI_VSFX 16
2025 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
2026 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
2028 extern unsigned long pci_cardbus_io_size;
2029 extern unsigned long pci_cardbus_mem_size;
2030 extern u8 pci_dfl_cache_line_size;
2031 extern u8 pci_cache_line_size;
2033 extern unsigned long pci_hotplug_io_size;
2034 extern unsigned long pci_hotplug_mem_size;
2035 extern unsigned long pci_hotplug_bus_size;
2037 /* Architecture-specific versions may override these (weak) */
2038 void pcibios_disable_device(struct pci_dev *dev);
2039 void pcibios_set_master(struct pci_dev *dev);
2040 int pcibios_set_pcie_reset_state(struct pci_dev *dev,
2041 enum pcie_reset_state state);
2042 int pcibios_add_device(struct pci_dev *dev);
2043 void pcibios_release_device(struct pci_dev *dev);
2045 void pcibios_penalize_isa_irq(int irq, int active);
2047 static inline void pcibios_penalize_isa_irq(int irq, int active) {}
2049 int pcibios_alloc_irq(struct pci_dev *dev);
2050 void pcibios_free_irq(struct pci_dev *dev);
2051 resource_size_t pcibios_default_alignment(void);
2053 #ifdef CONFIG_HIBERNATE_CALLBACKS
2054 extern struct dev_pm_ops pcibios_pm_ops;
2057 #if defined(CONFIG_PCI_MMCONFIG) || defined(CONFIG_ACPI_MCFG)
2058 void __init pci_mmcfg_early_init(void);
2059 void __init pci_mmcfg_late_init(void);
2061 static inline void pci_mmcfg_early_init(void) { }
2062 static inline void pci_mmcfg_late_init(void) { }
2065 int pci_ext_cfg_avail(void);
2067 void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
2068 void __iomem *pci_ioremap_wc_bar(struct pci_dev *pdev, int bar);
2070 #ifdef CONFIG_PCI_IOV
2071 int pci_iov_virtfn_bus(struct pci_dev *dev, int id);
2072 int pci_iov_virtfn_devfn(struct pci_dev *dev, int id);
2074 int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
2075 void pci_disable_sriov(struct pci_dev *dev);
2076 int pci_iov_add_virtfn(struct pci_dev *dev, int id);
2077 void pci_iov_remove_virtfn(struct pci_dev *dev, int id);
2078 int pci_num_vf(struct pci_dev *dev);
2079 int pci_vfs_assigned(struct pci_dev *dev);
2080 int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs);
2081 int pci_sriov_get_totalvfs(struct pci_dev *dev);
2082 int pci_sriov_configure_simple(struct pci_dev *dev, int nr_virtfn);
2083 resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno);
2084 void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe);
2086 /* Arch may override these (weak) */
2087 int pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs);
2088 int pcibios_sriov_disable(struct pci_dev *pdev);
2089 resource_size_t pcibios_iov_resource_alignment(struct pci_dev *dev, int resno);
2091 static inline int pci_iov_virtfn_bus(struct pci_dev *dev, int id)
2095 static inline int pci_iov_virtfn_devfn(struct pci_dev *dev, int id)
2099 static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
2101 static inline int pci_iov_add_virtfn(struct pci_dev *dev, int id)
2105 static inline void pci_iov_remove_virtfn(struct pci_dev *dev,
2107 static inline void pci_disable_sriov(struct pci_dev *dev) { }
2108 static inline int pci_num_vf(struct pci_dev *dev) { return 0; }
2109 static inline int pci_vfs_assigned(struct pci_dev *dev)
2111 static inline int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs)
2113 static inline int pci_sriov_get_totalvfs(struct pci_dev *dev)
2115 #define pci_sriov_configure_simple NULL
2116 static inline resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno)
2118 static inline void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe) { }
2121 #if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
2122 void pci_hp_create_module_link(struct pci_slot *pci_slot);
2123 void pci_hp_remove_module_link(struct pci_slot *pci_slot);
2127 * pci_pcie_cap - get the saved PCIe capability offset
2130 * PCIe capability offset is calculated at PCI device initialization
2131 * time and saved in the data structure. This function returns saved
2132 * PCIe capability offset. Using this instead of pci_find_capability()
2133 * reduces unnecessary search in the PCI configuration space. If you
2134 * need to calculate PCIe capability offset from raw device for some
2135 * reasons, please use pci_find_capability() instead.
2137 static inline int pci_pcie_cap(struct pci_dev *dev)
2139 return dev->pcie_cap;
2143 * pci_is_pcie - check if the PCI device is PCI Express capable
2146 * Returns: true if the PCI device is PCI Express capable, false otherwise.
2148 static inline bool pci_is_pcie(struct pci_dev *dev)
2150 return pci_pcie_cap(dev);
2154 * pcie_caps_reg - get the PCIe Capabilities Register
2157 static inline u16 pcie_caps_reg(const struct pci_dev *dev)
2159 return dev->pcie_flags_reg;
2163 * pci_pcie_type - get the PCIe device/port type
2166 static inline int pci_pcie_type(const struct pci_dev *dev)
2168 return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4;
2171 static inline struct pci_dev *pcie_find_root_port(struct pci_dev *dev)
2174 if (!pci_is_pcie(dev))
2176 if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT)
2178 if (!dev->bus->self)
2180 dev = dev->bus->self;
2185 void pci_request_acs(void);
2186 bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags);
2187 bool pci_acs_path_enabled(struct pci_dev *start,
2188 struct pci_dev *end, u16 acs_flags);
2189 int pci_enable_atomic_ops_to_root(struct pci_dev *dev, u32 cap_mask);
2191 #define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */
2192 #define PCI_VPD_LRDT_ID(x) ((x) | PCI_VPD_LRDT)
2194 /* Large Resource Data Type Tag Item Names */
2195 #define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */
2196 #define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */
2197 #define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */
2199 #define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING)
2200 #define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA)
2201 #define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA)
2203 /* Small Resource Data Type Tag Item Names */
2204 #define PCI_VPD_STIN_END 0x0f /* End */
2206 #define PCI_VPD_SRDT_END (PCI_VPD_STIN_END << 3)
2208 #define PCI_VPD_SRDT_TIN_MASK 0x78
2209 #define PCI_VPD_SRDT_LEN_MASK 0x07
2210 #define PCI_VPD_LRDT_TIN_MASK 0x7f
2212 #define PCI_VPD_LRDT_TAG_SIZE 3
2213 #define PCI_VPD_SRDT_TAG_SIZE 1
2215 #define PCI_VPD_INFO_FLD_HDR_SIZE 3
2217 #define PCI_VPD_RO_KEYWORD_PARTNO "PN"
2218 #define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
2219 #define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
2220 #define PCI_VPD_RO_KEYWORD_CHKSUM "RV"
2223 * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length
2224 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
2226 * Returns the extracted Large Resource Data Type length.
2228 static inline u16 pci_vpd_lrdt_size(const u8 *lrdt)
2230 return (u16)lrdt[1] + ((u16)lrdt[2] << 8);
2234 * pci_vpd_lrdt_tag - Extracts the Large Resource Data Type Tag Item
2235 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
2237 * Returns the extracted Large Resource Data Type Tag item.
2239 static inline u16 pci_vpd_lrdt_tag(const u8 *lrdt)
2241 return (u16)(lrdt[0] & PCI_VPD_LRDT_TIN_MASK);
2245 * pci_vpd_srdt_size - Extracts the Small Resource Data Type length
2246 * @srdt: Pointer to the beginning of the Small Resource Data Type tag
2248 * Returns the extracted Small Resource Data Type length.
2250 static inline u8 pci_vpd_srdt_size(const u8 *srdt)
2252 return (*srdt) & PCI_VPD_SRDT_LEN_MASK;
2256 * pci_vpd_srdt_tag - Extracts the Small Resource Data Type Tag Item
2257 * @srdt: Pointer to the beginning of the Small Resource Data Type tag
2259 * Returns the extracted Small Resource Data Type Tag Item.
2261 static inline u8 pci_vpd_srdt_tag(const u8 *srdt)
2263 return ((*srdt) & PCI_VPD_SRDT_TIN_MASK) >> 3;
2267 * pci_vpd_info_field_size - Extracts the information field length
2268 * @info_field: Pointer to the beginning of an information field header
2270 * Returns the extracted information field length.
2272 static inline u8 pci_vpd_info_field_size(const u8 *info_field)
2274 return info_field[2];
2278 * pci_vpd_find_tag - Locates the Resource Data Type tag provided
2279 * @buf: Pointer to buffered vpd data
2280 * @off: The offset into the buffer at which to begin the search
2281 * @len: The length of the vpd buffer
2282 * @rdt: The Resource Data Type to search for
2284 * Returns the index where the Resource Data Type was found or
2285 * -ENOENT otherwise.
2287 int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt);
2290 * pci_vpd_find_info_keyword - Locates an information field keyword in the VPD
2291 * @buf: Pointer to buffered vpd data
2292 * @off: The offset into the buffer at which to begin the search
2293 * @len: The length of the buffer area, relative to off, in which to search
2294 * @kw: The keyword to search for
2296 * Returns the index where the information field keyword was found or
2297 * -ENOENT otherwise.
2299 int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
2300 unsigned int len, const char *kw);
2302 /* PCI <-> OF binding helpers */
2306 void pci_set_of_node(struct pci_dev *dev);
2307 void pci_release_of_node(struct pci_dev *dev);
2308 void pci_set_bus_of_node(struct pci_bus *bus);
2309 void pci_release_bus_of_node(struct pci_bus *bus);
2310 struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus);
2311 int pci_parse_request_of_pci_ranges(struct device *dev,
2312 struct list_head *resources,
2313 struct resource **bus_range);
2315 /* Arch may override this (weak) */
2316 struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus);
2318 #else /* CONFIG_OF */
2319 static inline void pci_set_of_node(struct pci_dev *dev) { }
2320 static inline void pci_release_of_node(struct pci_dev *dev) { }
2321 static inline void pci_set_bus_of_node(struct pci_bus *bus) { }
2322 static inline void pci_release_bus_of_node(struct pci_bus *bus) { }
2323 static inline struct irq_domain *
2324 pci_host_bridge_of_msi_domain(struct pci_bus *bus) { return NULL; }
2325 static inline int pci_parse_request_of_pci_ranges(struct device *dev,
2326 struct list_head *resources,
2327 struct resource **bus_range)
2331 #endif /* CONFIG_OF */
2333 static inline struct device_node *
2334 pci_device_to_OF_node(const struct pci_dev *pdev)
2336 return pdev ? pdev->dev.of_node : NULL;
2339 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
2341 return bus ? bus->dev.of_node : NULL;
2345 struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus);
2348 pci_msi_register_fwnode_provider(struct fwnode_handle *(*fn)(struct device *));
2350 static inline struct irq_domain *
2351 pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) { return NULL; }
2355 static inline struct eeh_dev *pci_dev_to_eeh_dev(struct pci_dev *pdev)
2357 return pdev->dev.archdata.edev;
2361 void pci_add_dma_alias(struct pci_dev *dev, u8 devfn);
2362 bool pci_devs_are_dma_aliases(struct pci_dev *dev1, struct pci_dev *dev2);
2363 int pci_for_each_dma_alias(struct pci_dev *pdev,
2364 int (*fn)(struct pci_dev *pdev,
2365 u16 alias, void *data), void *data);
2367 /* Helper functions for operation of device flag */
2368 static inline void pci_set_dev_assigned(struct pci_dev *pdev)
2370 pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED;
2372 static inline void pci_clear_dev_assigned(struct pci_dev *pdev)
2374 pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
2376 static inline bool pci_is_dev_assigned(struct pci_dev *pdev)
2378 return (pdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED) == PCI_DEV_FLAGS_ASSIGNED;
2382 * pci_ari_enabled - query ARI forwarding status
2385 * Returns true if ARI forwarding is enabled.
2387 static inline bool pci_ari_enabled(struct pci_bus *bus)
2389 return bus->self && bus->self->ari_enabled;
2393 * pci_is_thunderbolt_attached - whether device is on a Thunderbolt daisy chain
2394 * @pdev: PCI device to check
2396 * Walk upwards from @pdev and check for each encountered bridge if it's part
2397 * of a Thunderbolt controller. Reaching the host bridge means @pdev is not
2398 * Thunderbolt-attached. (But rather soldered to the mainboard usually.)
2400 static inline bool pci_is_thunderbolt_attached(struct pci_dev *pdev)
2402 struct pci_dev *parent = pdev;
2404 if (pdev->is_thunderbolt)
2407 while ((parent = pci_upstream_bridge(parent)))
2408 if (parent->is_thunderbolt)
2414 #if defined(CONFIG_PCIEPORTBUS) || defined(CONFIG_EEH)
2415 void pci_uevent_ers(struct pci_dev *pdev, enum pci_ers_result err_type);
2418 /* Provide the legacy pci_dma_* API */
2419 #include <linux/pci-dma-compat.h>
2421 #define pci_printk(level, pdev, fmt, arg...) \
2422 dev_printk(level, &(pdev)->dev, fmt, ##arg)
2424 #define pci_emerg(pdev, fmt, arg...) dev_emerg(&(pdev)->dev, fmt, ##arg)
2425 #define pci_alert(pdev, fmt, arg...) dev_alert(&(pdev)->dev, fmt, ##arg)
2426 #define pci_crit(pdev, fmt, arg...) dev_crit(&(pdev)->dev, fmt, ##arg)
2427 #define pci_err(pdev, fmt, arg...) dev_err(&(pdev)->dev, fmt, ##arg)
2428 #define pci_warn(pdev, fmt, arg...) dev_warn(&(pdev)->dev, fmt, ##arg)
2429 #define pci_notice(pdev, fmt, arg...) dev_notice(&(pdev)->dev, fmt, ##arg)
2430 #define pci_info(pdev, fmt, arg...) dev_info(&(pdev)->dev, fmt, ##arg)
2431 #define pci_dbg(pdev, fmt, arg...) dev_dbg(&(pdev)->dev, fmt, ##arg)
2433 #define pci_notice_ratelimited(pdev, fmt, arg...) \
2434 dev_notice_ratelimited(&(pdev)->dev, fmt, ##arg)
2436 #endif /* LINUX_PCI_H */