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 * The pci_channel state describes connectivity between the CPU and
155 * the PCI device. If some PCI bus between here and the PCI device
156 * has crashed or locked up, this info is reflected here.
158 typedef unsigned int __bitwise pci_channel_state_t;
160 enum pci_channel_state {
161 /* I/O channel is in normal state */
162 pci_channel_io_normal = (__force pci_channel_state_t) 1,
164 /* I/O to channel is blocked */
165 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
167 /* PCI card is dead */
168 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
171 typedef unsigned int __bitwise pcie_reset_state_t;
173 enum pcie_reset_state {
174 /* Reset is NOT asserted (Use to deassert reset) */
175 pcie_deassert_reset = (__force pcie_reset_state_t) 1,
177 /* Use #PERST to reset PCIe device */
178 pcie_warm_reset = (__force pcie_reset_state_t) 2,
180 /* Use PCIe Hot Reset to reset device */
181 pcie_hot_reset = (__force pcie_reset_state_t) 3
184 typedef unsigned short __bitwise pci_dev_flags_t;
186 /* INTX_DISABLE in PCI_COMMAND register disables MSI too */
187 PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) (1 << 0),
188 /* Device configuration is irrevocably lost if disabled into D3 */
189 PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) (1 << 1),
190 /* Provide indication device is assigned by a Virtual Machine Manager */
191 PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) (1 << 2),
192 /* Flag for quirk use to store if quirk-specific ACS is enabled */
193 PCI_DEV_FLAGS_ACS_ENABLED_QUIRK = (__force pci_dev_flags_t) (1 << 3),
194 /* Use a PCIe-to-PCI bridge alias even if !pci_is_pcie */
195 PCI_DEV_FLAG_PCIE_BRIDGE_ALIAS = (__force pci_dev_flags_t) (1 << 5),
196 /* Do not use bus resets for device */
197 PCI_DEV_FLAGS_NO_BUS_RESET = (__force pci_dev_flags_t) (1 << 6),
198 /* Do not use PM reset even if device advertises NoSoftRst- */
199 PCI_DEV_FLAGS_NO_PM_RESET = (__force pci_dev_flags_t) (1 << 7),
200 /* Get VPD from function 0 VPD */
201 PCI_DEV_FLAGS_VPD_REF_F0 = (__force pci_dev_flags_t) (1 << 8),
202 /* A non-root bridge where translation occurs, stop alias search here */
203 PCI_DEV_FLAGS_BRIDGE_XLATE_ROOT = (__force pci_dev_flags_t) (1 << 9),
204 /* Do not use FLR even if device advertises PCI_AF_CAP */
205 PCI_DEV_FLAGS_NO_FLR_RESET = (__force pci_dev_flags_t) (1 << 10),
206 /* Don't use Relaxed Ordering for TLPs directed at this device */
207 PCI_DEV_FLAGS_NO_RELAXED_ORDERING = (__force pci_dev_flags_t) (1 << 11),
210 enum pci_irq_reroute_variant {
211 INTEL_IRQ_REROUTE_VARIANT = 1,
212 MAX_IRQ_REROUTE_VARIANTS = 3
215 typedef unsigned short __bitwise pci_bus_flags_t;
217 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
218 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
219 PCI_BUS_FLAGS_NO_AERSID = (__force pci_bus_flags_t) 4,
220 PCI_BUS_FLAGS_NO_EXTCFG = (__force pci_bus_flags_t) 8,
223 /* Values from Link Status register, PCIe r3.1, sec 7.8.8 */
224 enum pcie_link_width {
225 PCIE_LNK_WIDTH_RESRV = 0x00,
233 PCIE_LNK_WIDTH_UNKNOWN = 0xff,
236 /* Based on the PCI Hotplug Spec, but some values are made up by us */
238 PCI_SPEED_33MHz = 0x00,
239 PCI_SPEED_66MHz = 0x01,
240 PCI_SPEED_66MHz_PCIX = 0x02,
241 PCI_SPEED_100MHz_PCIX = 0x03,
242 PCI_SPEED_133MHz_PCIX = 0x04,
243 PCI_SPEED_66MHz_PCIX_ECC = 0x05,
244 PCI_SPEED_100MHz_PCIX_ECC = 0x06,
245 PCI_SPEED_133MHz_PCIX_ECC = 0x07,
246 PCI_SPEED_66MHz_PCIX_266 = 0x09,
247 PCI_SPEED_100MHz_PCIX_266 = 0x0a,
248 PCI_SPEED_133MHz_PCIX_266 = 0x0b,
254 PCI_SPEED_66MHz_PCIX_533 = 0x11,
255 PCI_SPEED_100MHz_PCIX_533 = 0x12,
256 PCI_SPEED_133MHz_PCIX_533 = 0x13,
257 PCIE_SPEED_2_5GT = 0x14,
258 PCIE_SPEED_5_0GT = 0x15,
259 PCIE_SPEED_8_0GT = 0x16,
260 PCIE_SPEED_16_0GT = 0x17,
261 PCI_SPEED_UNKNOWN = 0xff,
264 enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev);
265 enum pcie_link_width pcie_get_width_cap(struct pci_dev *dev);
267 struct pci_cap_saved_data {
274 struct pci_cap_saved_state {
275 struct hlist_node next;
276 struct pci_cap_saved_data cap;
280 struct pcie_link_state;
285 /* The pci_dev structure describes PCI devices */
287 struct list_head bus_list; /* Node in per-bus list */
288 struct pci_bus *bus; /* Bus this device is on */
289 struct pci_bus *subordinate; /* Bus this device bridges to */
291 void *sysdata; /* Hook for sys-specific extension */
292 struct proc_dir_entry *procent; /* Device entry in /proc/bus/pci */
293 struct pci_slot *slot; /* Physical slot this device is in */
295 unsigned int devfn; /* Encoded device & function index */
296 unsigned short vendor;
297 unsigned short device;
298 unsigned short subsystem_vendor;
299 unsigned short subsystem_device;
300 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
301 u8 revision; /* PCI revision, low byte of class word */
302 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
303 #ifdef CONFIG_PCIEAER
304 u16 aer_cap; /* AER capability offset */
305 struct aer_stats *aer_stats; /* AER stats for this device */
307 u8 pcie_cap; /* PCIe capability offset */
308 u8 msi_cap; /* MSI capability offset */
309 u8 msix_cap; /* MSI-X capability offset */
310 u8 pcie_mpss:3; /* PCIe Max Payload Size Supported */
311 u8 rom_base_reg; /* Config register controlling ROM */
312 u8 pin; /* Interrupt pin this device uses */
313 u16 pcie_flags_reg; /* Cached PCIe Capabilities Register */
314 unsigned long *dma_alias_mask;/* Mask of enabled devfn aliases */
316 struct pci_driver *driver; /* Driver bound to this device */
317 u64 dma_mask; /* Mask of the bits of bus address this
318 device implements. Normally this is
319 0xffffffff. You only need to change
320 this if your device has broken DMA
321 or supports 64-bit transfers. */
323 struct device_dma_parameters dma_parms;
325 pci_power_t current_state; /* Current operating state. In ACPI,
326 this is D0-D3, D0 being fully
327 functional, and D3 being off. */
328 u8 pm_cap; /* PM capability offset */
329 unsigned int pme_support:5; /* Bitmask of states from which PME#
331 unsigned int pme_poll:1; /* Poll device's PME status bit */
332 unsigned int d1_support:1; /* Low power state D1 is supported */
333 unsigned int d2_support:1; /* Low power state D2 is supported */
334 unsigned int no_d1d2:1; /* D1 and D2 are forbidden */
335 unsigned int no_d3cold:1; /* D3cold is forbidden */
336 unsigned int bridge_d3:1; /* Allow D3 for bridge */
337 unsigned int d3cold_allowed:1; /* D3cold is allowed by user */
338 unsigned int mmio_always_on:1; /* Disallow turning off io/mem
339 decoding during BAR sizing */
340 unsigned int wakeup_prepared:1;
341 unsigned int runtime_d3cold:1; /* Whether go through runtime
342 D3cold, not set for devices
343 powered on/off by the
344 corresponding bridge */
345 unsigned int ignore_hotplug:1; /* Ignore hotplug events */
346 unsigned int hotplug_user_indicators:1; /* SlotCtl indicators
347 controlled exclusively by
349 unsigned int d3_delay; /* D3->D0 transition time in ms */
350 unsigned int d3cold_delay; /* D3cold->D0 transition time in ms */
352 #ifdef CONFIG_PCIEASPM
353 struct pcie_link_state *link_state; /* ASPM link state */
354 unsigned int ltr_path:1; /* Latency Tolerance Reporting
355 supported from root to here */
357 unsigned int eetlp_prefix_path:1; /* End-to-End TLP Prefix */
359 pci_channel_state_t error_state; /* Current connectivity state */
360 struct device dev; /* Generic device interface */
362 int cfg_size; /* Size of config space */
365 * Instead of touching interrupt line and base address registers
366 * directly, use the values stored here. They might be different!
369 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
371 bool match_driver; /* Skip attaching driver */
373 unsigned int transparent:1; /* Subtractive decode bridge */
374 unsigned int multifunction:1; /* Multi-function device */
376 unsigned int is_busmaster:1; /* Is busmaster */
377 unsigned int no_msi:1; /* May not use MSI */
378 unsigned int no_64bit_msi:1; /* May only use 32-bit MSIs */
379 unsigned int block_cfg_access:1; /* Config space access blocked */
380 unsigned int broken_parity_status:1; /* Generates false positive parity */
381 unsigned int irq_reroute_variant:2; /* Needs IRQ rerouting variant */
382 unsigned int msi_enabled:1;
383 unsigned int msix_enabled:1;
384 unsigned int ari_enabled:1; /* ARI forwarding */
385 unsigned int ats_enabled:1; /* Address Translation Svc */
386 unsigned int pasid_enabled:1; /* Process Address Space ID */
387 unsigned int pri_enabled:1; /* Page Request Interface */
388 unsigned int is_managed:1;
389 unsigned int needs_freset:1; /* Requires fundamental reset */
390 unsigned int state_saved:1;
391 unsigned int is_physfn:1;
392 unsigned int is_virtfn:1;
393 unsigned int reset_fn:1;
394 unsigned int is_hotplug_bridge:1;
395 unsigned int shpc_managed:1; /* SHPC owned by shpchp */
396 unsigned int is_thunderbolt:1; /* Thunderbolt controller */
397 unsigned int __aer_firmware_first_valid:1;
398 unsigned int __aer_firmware_first:1;
399 unsigned int broken_intx_masking:1; /* INTx masking can't be used */
400 unsigned int io_window_1k:1; /* Intel bridge 1K I/O windows */
401 unsigned int irq_managed:1;
402 unsigned int has_secondary_link:1;
403 unsigned int non_compliant_bars:1; /* Broken BARs; ignore them */
404 unsigned int is_probed:1; /* Device probing in progress */
405 pci_dev_flags_t dev_flags;
406 atomic_t enable_cnt; /* pci_enable_device has been called */
408 u32 saved_config_space[16]; /* Config space saved at suspend time */
409 struct hlist_head saved_cap_space;
410 struct bin_attribute *rom_attr; /* Attribute descriptor for sysfs ROM entry */
411 int rom_attr_enabled; /* Display of ROM attribute enabled? */
412 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
413 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
415 #ifdef CONFIG_HOTPLUG_PCI_PCIE
416 unsigned int broken_cmd_compl:1; /* No compl for some cmds */
418 #ifdef CONFIG_PCIE_PTM
419 unsigned int ptm_root:1;
420 unsigned int ptm_enabled:1;
423 #ifdef CONFIG_PCI_MSI
424 const struct attribute_group **msi_irq_groups;
427 #ifdef CONFIG_PCI_ATS
429 struct pci_sriov *sriov; /* PF: SR-IOV info */
430 struct pci_dev *physfn; /* VF: related PF */
432 u16 ats_cap; /* ATS Capability offset */
433 u8 ats_stu; /* ATS Smallest Translation Unit */
434 atomic_t ats_ref_cnt; /* Number of VFs with ATS enabled */
436 #ifdef CONFIG_PCI_PRI
437 u32 pri_reqs_alloc; /* Number of PRI requests allocated */
439 #ifdef CONFIG_PCI_PASID
442 phys_addr_t rom; /* Physical address if not from BAR */
443 size_t romlen; /* Length if not from BAR */
444 char *driver_override; /* Driver name to force a match */
446 unsigned long priv_flags; /* Private flags for the PCI driver */
449 static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
451 #ifdef CONFIG_PCI_IOV
458 struct pci_dev *pci_alloc_dev(struct pci_bus *bus);
460 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
461 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
463 static inline int pci_channel_offline(struct pci_dev *pdev)
465 return (pdev->error_state != pci_channel_io_normal);
468 struct pci_host_bridge {
470 struct pci_bus *bus; /* Root bus */
474 struct list_head windows; /* resource_entry */
475 u8 (*swizzle_irq)(struct pci_dev *, u8 *); /* Platform IRQ swizzler */
476 int (*map_irq)(const struct pci_dev *, u8, u8);
477 void (*release_fn)(struct pci_host_bridge *);
479 struct msi_controller *msi;
480 unsigned int ignore_reset_delay:1; /* For entire hierarchy */
481 unsigned int no_ext_tags:1; /* No Extended Tags */
482 unsigned int native_aer:1; /* OS may use PCIe AER */
483 unsigned int native_pcie_hotplug:1; /* OS may use PCIe hotplug */
484 unsigned int native_shpc_hotplug:1; /* OS may use SHPC hotplug */
485 unsigned int native_pme:1; /* OS may use PCIe PME */
486 unsigned int native_ltr:1; /* OS may use PCIe LTR */
487 /* Resource alignment requirements */
488 resource_size_t (*align_resource)(struct pci_dev *dev,
489 const struct resource *res,
490 resource_size_t start,
491 resource_size_t size,
492 resource_size_t align);
493 unsigned long private[0] ____cacheline_aligned;
496 #define to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev)
498 static inline void *pci_host_bridge_priv(struct pci_host_bridge *bridge)
500 return (void *)bridge->private;
503 static inline struct pci_host_bridge *pci_host_bridge_from_priv(void *priv)
505 return container_of(priv, struct pci_host_bridge, private);
508 struct pci_host_bridge *pci_alloc_host_bridge(size_t priv);
509 struct pci_host_bridge *devm_pci_alloc_host_bridge(struct device *dev,
511 void pci_free_host_bridge(struct pci_host_bridge *bridge);
512 struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus);
514 void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
515 void (*release_fn)(struct pci_host_bridge *),
518 int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge);
521 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
522 * to P2P or CardBus bridge windows) go in a table. Additional ones (for
523 * buses below host bridges or subtractive decode bridges) go in the list.
524 * Use pci_bus_for_each_resource() to iterate through all the resources.
528 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly
529 * and there's no way to program the bridge with the details of the window.
530 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive-
531 * decode bit set, because they are explicit and can be programmed with _SRS.
533 #define PCI_SUBTRACTIVE_DECODE 0x1
535 struct pci_bus_resource {
536 struct list_head list;
537 struct resource *res;
541 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
544 struct list_head node; /* Node in list of buses */
545 struct pci_bus *parent; /* Parent bus this bridge is on */
546 struct list_head children; /* List of child buses */
547 struct list_head devices; /* List of devices on this bus */
548 struct pci_dev *self; /* Bridge device as seen by parent */
549 struct list_head slots; /* List of slots on this bus;
550 protected by pci_slot_mutex */
551 struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
552 struct list_head resources; /* Address space routed to this bus */
553 struct resource busn_res; /* Bus numbers routed to this bus */
555 struct pci_ops *ops; /* Configuration access functions */
556 struct msi_controller *msi; /* MSI controller */
557 void *sysdata; /* Hook for sys-specific extension */
558 struct proc_dir_entry *procdir; /* Directory entry in /proc/bus/pci */
560 unsigned char number; /* Bus number */
561 unsigned char primary; /* Number of primary bridge */
562 unsigned char max_bus_speed; /* enum pci_bus_speed */
563 unsigned char cur_bus_speed; /* enum pci_bus_speed */
564 #ifdef CONFIG_PCI_DOMAINS_GENERIC
570 unsigned short bridge_ctl; /* Manage NO_ISA/FBB/et al behaviors */
571 pci_bus_flags_t bus_flags; /* Inherited by child buses */
572 struct device *bridge;
574 struct bin_attribute *legacy_io; /* Legacy I/O for this bus */
575 struct bin_attribute *legacy_mem; /* Legacy mem */
576 unsigned int is_added:1;
579 #define to_pci_bus(n) container_of(n, struct pci_bus, dev)
582 * Returns true if the PCI bus is root (behind host-PCI bridge),
585 * Some code assumes that "bus->self == NULL" means that bus is a root bus.
586 * This is incorrect because "virtual" buses added for SR-IOV (via
587 * virtfn_add_bus()) have "bus->self == NULL" but are not root buses.
589 static inline bool pci_is_root_bus(struct pci_bus *pbus)
591 return !(pbus->parent);
595 * pci_is_bridge - check if the PCI device is a bridge
598 * Return true if the PCI device is bridge whether it has subordinate
601 static inline bool pci_is_bridge(struct pci_dev *dev)
603 return dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
604 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS;
607 #define for_each_pci_bridge(dev, bus) \
608 list_for_each_entry(dev, &bus->devices, bus_list) \
609 if (!pci_is_bridge(dev)) {} else
611 static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev)
613 dev = pci_physfn(dev);
614 if (pci_is_root_bus(dev->bus))
617 return dev->bus->self;
620 struct device *pci_get_host_bridge_device(struct pci_dev *dev);
621 void pci_put_host_bridge_device(struct device *dev);
623 #ifdef CONFIG_PCI_MSI
624 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
626 return pci_dev->msi_enabled || pci_dev->msix_enabled;
629 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
632 /* Error values that may be returned by PCI functions */
633 #define PCIBIOS_SUCCESSFUL 0x00
634 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
635 #define PCIBIOS_BAD_VENDOR_ID 0x83
636 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
637 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
638 #define PCIBIOS_SET_FAILED 0x88
639 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
641 /* Translate above to generic errno for passing back through non-PCI code */
642 static inline int pcibios_err_to_errno(int err)
644 if (err <= PCIBIOS_SUCCESSFUL)
645 return err; /* Assume already errno */
648 case PCIBIOS_FUNC_NOT_SUPPORTED:
650 case PCIBIOS_BAD_VENDOR_ID:
652 case PCIBIOS_DEVICE_NOT_FOUND:
654 case PCIBIOS_BAD_REGISTER_NUMBER:
656 case PCIBIOS_SET_FAILED:
658 case PCIBIOS_BUFFER_TOO_SMALL:
665 /* Low-level architecture-dependent routines */
668 int (*add_bus)(struct pci_bus *bus);
669 void (*remove_bus)(struct pci_bus *bus);
670 void __iomem *(*map_bus)(struct pci_bus *bus, unsigned int devfn, int where);
671 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
672 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
676 * ACPI needs to be able to access PCI config space before we've done a
677 * PCI bus scan and created pci_bus structures.
679 int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
680 int reg, int len, u32 *val);
681 int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
682 int reg, int len, u32 val);
684 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
685 typedef u64 pci_bus_addr_t;
687 typedef u32 pci_bus_addr_t;
690 struct pci_bus_region {
691 pci_bus_addr_t start;
696 spinlock_t lock; /* Protects list, index */
697 struct list_head list; /* For IDs added at runtime */
702 * PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
703 * a set of callbacks in struct pci_error_handlers, that device driver
704 * will be notified of PCI bus errors, and will be driven to recovery
705 * when an error occurs.
708 typedef unsigned int __bitwise pci_ers_result_t;
710 enum pci_ers_result {
711 /* No result/none/not supported in device driver */
712 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
714 /* Device driver can recover without slot reset */
715 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
717 /* Device driver wants slot to be reset */
718 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
720 /* Device has completely failed, is unrecoverable */
721 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
723 /* Device driver is fully recovered and operational */
724 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
726 /* No AER capabilities registered for the driver */
727 PCI_ERS_RESULT_NO_AER_DRIVER = (__force pci_ers_result_t) 6,
730 /* PCI bus error event callbacks */
731 struct pci_error_handlers {
732 /* PCI bus error detected on this device */
733 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
734 enum pci_channel_state error);
736 /* MMIO has been re-enabled, but not DMA */
737 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
739 /* PCI slot has been reset */
740 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
742 /* PCI function reset prepare or completed */
743 void (*reset_prepare)(struct pci_dev *dev);
744 void (*reset_done)(struct pci_dev *dev);
746 /* Device driver may resume normal operations */
747 void (*resume)(struct pci_dev *dev);
753 struct list_head node;
755 const struct pci_device_id *id_table; /* Must be non-NULL for probe to be called */
756 int (*probe)(struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
757 void (*remove)(struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
758 int (*suspend)(struct pci_dev *dev, pm_message_t state); /* Device suspended */
759 int (*suspend_late)(struct pci_dev *dev, pm_message_t state);
760 int (*resume_early)(struct pci_dev *dev);
761 int (*resume) (struct pci_dev *dev); /* Device woken up */
762 void (*shutdown) (struct pci_dev *dev);
763 int (*sriov_configure) (struct pci_dev *dev, int num_vfs); /* On PF */
764 const struct pci_error_handlers *err_handler;
765 const struct attribute_group **groups;
766 struct device_driver driver;
767 struct pci_dynids dynids;
770 #define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
773 * PCI_DEVICE - macro used to describe a specific PCI device
774 * @vend: the 16 bit PCI Vendor ID
775 * @dev: the 16 bit PCI Device ID
777 * This macro is used to create a struct pci_device_id that matches a
778 * specific device. The subvendor and subdevice fields will be set to
781 #define PCI_DEVICE(vend,dev) \
782 .vendor = (vend), .device = (dev), \
783 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
786 * PCI_DEVICE_SUB - macro used to describe a specific PCI device with subsystem
787 * @vend: the 16 bit PCI Vendor ID
788 * @dev: the 16 bit PCI Device ID
789 * @subvend: the 16 bit PCI Subvendor ID
790 * @subdev: the 16 bit PCI Subdevice ID
792 * This macro is used to create a struct pci_device_id that matches a
793 * specific device with subsystem information.
795 #define PCI_DEVICE_SUB(vend, dev, subvend, subdev) \
796 .vendor = (vend), .device = (dev), \
797 .subvendor = (subvend), .subdevice = (subdev)
800 * PCI_DEVICE_CLASS - macro used to describe a specific PCI device class
801 * @dev_class: the class, subclass, prog-if triple for this device
802 * @dev_class_mask: the class mask for this device
804 * This macro is used to create a struct pci_device_id that matches a
805 * specific PCI class. The vendor, device, subvendor, and subdevice
806 * fields will be set to PCI_ANY_ID.
808 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
809 .class = (dev_class), .class_mask = (dev_class_mask), \
810 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
811 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
814 * PCI_VDEVICE - macro used to describe a specific PCI device in short form
815 * @vend: the vendor name
816 * @dev: the 16 bit PCI Device ID
818 * This macro is used to create a struct pci_device_id that matches a
819 * specific PCI device. The subvendor, and subdevice fields will be set
820 * to PCI_ANY_ID. The macro allows the next field to follow as the device
823 #define PCI_VDEVICE(vend, dev) \
824 .vendor = PCI_VENDOR_ID_##vend, .device = (dev), \
825 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0
828 * PCI_DEVICE_DATA - macro used to describe a specific PCI device in very short form
829 * @vend: the vendor name (without PCI_VENDOR_ID_ prefix)
830 * @dev: the device name (without PCI_DEVICE_ID_<vend>_ prefix)
831 * @data: the driver data to be filled
833 * This macro is used to create a struct pci_device_id that matches a
834 * specific PCI device. The subvendor, and subdevice fields will be set
837 #define PCI_DEVICE_DATA(vend, dev, data) \
838 .vendor = PCI_VENDOR_ID_##vend, .device = PCI_DEVICE_ID_##vend##_##dev, \
839 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0, \
840 .driver_data = (kernel_ulong_t)(data)
843 PCI_REASSIGN_ALL_RSRC = 0x00000001, /* Ignore firmware setup */
844 PCI_REASSIGN_ALL_BUS = 0x00000002, /* Reassign all bus numbers */
845 PCI_PROBE_ONLY = 0x00000004, /* Use existing setup */
846 PCI_CAN_SKIP_ISA_ALIGN = 0x00000008, /* Don't do ISA alignment */
847 PCI_ENABLE_PROC_DOMAINS = 0x00000010, /* Enable domains in /proc */
848 PCI_COMPAT_DOMAIN_0 = 0x00000020, /* ... except domain 0 */
849 PCI_SCAN_ALL_PCIE_DEVS = 0x00000040, /* Scan all, not just dev 0 */
852 /* These external functions are only available when PCI support is enabled */
855 extern unsigned int pci_flags;
857 static inline void pci_set_flags(int flags) { pci_flags = flags; }
858 static inline void pci_add_flags(int flags) { pci_flags |= flags; }
859 static inline void pci_clear_flags(int flags) { pci_flags &= ~flags; }
860 static inline int pci_has_flag(int flag) { return pci_flags & flag; }
862 void pcie_bus_configure_settings(struct pci_bus *bus);
864 enum pcie_bus_config_types {
865 PCIE_BUS_TUNE_OFF, /* Don't touch MPS at all */
866 PCIE_BUS_DEFAULT, /* Ensure MPS matches upstream bridge */
867 PCIE_BUS_SAFE, /* Use largest MPS boot-time devices support */
868 PCIE_BUS_PERFORMANCE, /* Use MPS and MRRS for best performance */
869 PCIE_BUS_PEER2PEER, /* Set MPS = 128 for all devices */
872 extern enum pcie_bus_config_types pcie_bus_config;
874 extern struct bus_type pci_bus_type;
876 /* Do NOT directly access these two variables, unless you are arch-specific PCI
877 * code, or PCI core code. */
878 extern struct list_head pci_root_buses; /* List of all known PCI buses */
879 /* Some device drivers need know if PCI is initiated */
880 int no_pci_devices(void);
882 void pcibios_resource_survey_bus(struct pci_bus *bus);
883 void pcibios_bus_add_device(struct pci_dev *pdev);
884 void pcibios_add_bus(struct pci_bus *bus);
885 void pcibios_remove_bus(struct pci_bus *bus);
886 void pcibios_fixup_bus(struct pci_bus *);
887 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
888 /* Architecture-specific versions may override this (weak) */
889 char *pcibios_setup(char *str);
891 /* Used only when drivers/pci/setup.c is used */
892 resource_size_t pcibios_align_resource(void *, const struct resource *,
896 /* Weak but can be overriden by arch */
897 void pci_fixup_cardbus(struct pci_bus *);
899 /* Generic PCI functions used internally */
901 void pcibios_resource_to_bus(struct pci_bus *bus, struct pci_bus_region *region,
902 struct resource *res);
903 void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
904 struct pci_bus_region *region);
905 void pcibios_scan_specific_bus(int busn);
906 struct pci_bus *pci_find_bus(int domain, int busnr);
907 void pci_bus_add_devices(const struct pci_bus *bus);
908 struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
909 struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
910 struct pci_ops *ops, void *sysdata,
911 struct list_head *resources);
912 int pci_host_probe(struct pci_host_bridge *bridge);
913 int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
914 int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax);
915 void pci_bus_release_busn_res(struct pci_bus *b);
916 struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
917 struct pci_ops *ops, void *sysdata,
918 struct list_head *resources);
919 int pci_scan_root_bus_bridge(struct pci_host_bridge *bridge);
920 struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
922 void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
923 struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
925 struct hotplug_slot *hotplug);
926 void pci_destroy_slot(struct pci_slot *slot);
928 void pci_dev_assign_slot(struct pci_dev *dev);
930 static inline void pci_dev_assign_slot(struct pci_dev *dev) { }
932 int pci_scan_slot(struct pci_bus *bus, int devfn);
933 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
934 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
935 unsigned int pci_scan_child_bus(struct pci_bus *bus);
936 void pci_bus_add_device(struct pci_dev *dev);
937 void pci_read_bridge_bases(struct pci_bus *child);
938 struct resource *pci_find_parent_resource(const struct pci_dev *dev,
939 struct resource *res);
940 struct pci_dev *pci_find_pcie_root_port(struct pci_dev *dev);
941 u8 pci_swizzle_interrupt_pin(const struct pci_dev *dev, u8 pin);
942 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
943 u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
944 struct pci_dev *pci_dev_get(struct pci_dev *dev);
945 void pci_dev_put(struct pci_dev *dev);
946 void pci_remove_bus(struct pci_bus *b);
947 void pci_stop_and_remove_bus_device(struct pci_dev *dev);
948 void pci_stop_and_remove_bus_device_locked(struct pci_dev *dev);
949 void pci_stop_root_bus(struct pci_bus *bus);
950 void pci_remove_root_bus(struct pci_bus *bus);
951 void pci_setup_cardbus(struct pci_bus *bus);
952 void pcibios_setup_bridge(struct pci_bus *bus, unsigned long type);
953 void pci_sort_breadthfirst(void);
954 #define dev_is_pci(d) ((d)->bus == &pci_bus_type)
955 #define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false))
957 /* Generic PCI functions exported to card drivers */
959 enum pci_lost_interrupt_reason {
960 PCI_LOST_IRQ_NO_INFORMATION = 0,
961 PCI_LOST_IRQ_DISABLE_MSI,
962 PCI_LOST_IRQ_DISABLE_MSIX,
963 PCI_LOST_IRQ_DISABLE_ACPI,
965 enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *dev);
966 int pci_find_capability(struct pci_dev *dev, int cap);
967 int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
968 int pci_find_ext_capability(struct pci_dev *dev, int cap);
969 int pci_find_next_ext_capability(struct pci_dev *dev, int pos, int cap);
970 int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
971 int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
972 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
974 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
975 struct pci_dev *from);
976 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
977 unsigned int ss_vendor, unsigned int ss_device,
978 struct pci_dev *from);
979 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
980 struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
982 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
983 int pci_dev_present(const struct pci_device_id *ids);
985 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
987 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
988 int where, u16 *val);
989 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
990 int where, u32 *val);
991 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
993 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
995 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
998 int pci_generic_config_read(struct pci_bus *bus, unsigned int devfn,
999 int where, int size, u32 *val);
1000 int pci_generic_config_write(struct pci_bus *bus, unsigned int devfn,
1001 int where, int size, u32 val);
1002 int pci_generic_config_read32(struct pci_bus *bus, unsigned int devfn,
1003 int where, int size, u32 *val);
1004 int pci_generic_config_write32(struct pci_bus *bus, unsigned int devfn,
1005 int where, int size, u32 val);
1007 struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
1009 int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val);
1010 int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val);
1011 int pci_read_config_dword(const struct pci_dev *dev, int where, u32 *val);
1012 int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val);
1013 int pci_write_config_word(const struct pci_dev *dev, int where, u16 val);
1014 int pci_write_config_dword(const struct pci_dev *dev, int where, u32 val);
1016 int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val);
1017 int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val);
1018 int pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val);
1019 int pcie_capability_write_dword(struct pci_dev *dev, int pos, u32 val);
1020 int pcie_capability_clear_and_set_word(struct pci_dev *dev, int pos,
1021 u16 clear, u16 set);
1022 int pcie_capability_clear_and_set_dword(struct pci_dev *dev, int pos,
1023 u32 clear, u32 set);
1025 static inline int pcie_capability_set_word(struct pci_dev *dev, int pos,
1028 return pcie_capability_clear_and_set_word(dev, pos, 0, set);
1031 static inline int pcie_capability_set_dword(struct pci_dev *dev, int pos,
1034 return pcie_capability_clear_and_set_dword(dev, pos, 0, set);
1037 static inline int pcie_capability_clear_word(struct pci_dev *dev, int pos,
1040 return pcie_capability_clear_and_set_word(dev, pos, clear, 0);
1043 static inline int pcie_capability_clear_dword(struct pci_dev *dev, int pos,
1046 return pcie_capability_clear_and_set_dword(dev, pos, clear, 0);
1049 /* User-space driven config access */
1050 int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
1051 int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
1052 int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val);
1053 int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val);
1054 int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val);
1055 int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val);
1057 int __must_check pci_enable_device(struct pci_dev *dev);
1058 int __must_check pci_enable_device_io(struct pci_dev *dev);
1059 int __must_check pci_enable_device_mem(struct pci_dev *dev);
1060 int __must_check pci_reenable_device(struct pci_dev *);
1061 int __must_check pcim_enable_device(struct pci_dev *pdev);
1062 void pcim_pin_device(struct pci_dev *pdev);
1064 static inline bool pci_intx_mask_supported(struct pci_dev *pdev)
1067 * INTx masking is supported if PCI_COMMAND_INTX_DISABLE is
1068 * writable and no quirk has marked the feature broken.
1070 return !pdev->broken_intx_masking;
1073 static inline int pci_is_enabled(struct pci_dev *pdev)
1075 return (atomic_read(&pdev->enable_cnt) > 0);
1078 static inline int pci_is_managed(struct pci_dev *pdev)
1080 return pdev->is_managed;
1083 void pci_disable_device(struct pci_dev *dev);
1085 extern unsigned int pcibios_max_latency;
1086 void pci_set_master(struct pci_dev *dev);
1087 void pci_clear_master(struct pci_dev *dev);
1089 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
1090 int pci_set_cacheline_size(struct pci_dev *dev);
1091 #define HAVE_PCI_SET_MWI
1092 int __must_check pci_set_mwi(struct pci_dev *dev);
1093 int __must_check pcim_set_mwi(struct pci_dev *dev);
1094 int pci_try_set_mwi(struct pci_dev *dev);
1095 void pci_clear_mwi(struct pci_dev *dev);
1096 void pci_intx(struct pci_dev *dev, int enable);
1097 bool pci_check_and_mask_intx(struct pci_dev *dev);
1098 bool pci_check_and_unmask_intx(struct pci_dev *dev);
1099 int pci_wait_for_pending(struct pci_dev *dev, int pos, u16 mask);
1100 int pci_wait_for_pending_transaction(struct pci_dev *dev);
1101 int pcix_get_max_mmrbc(struct pci_dev *dev);
1102 int pcix_get_mmrbc(struct pci_dev *dev);
1103 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
1104 int pcie_get_readrq(struct pci_dev *dev);
1105 int pcie_set_readrq(struct pci_dev *dev, int rq);
1106 int pcie_get_mps(struct pci_dev *dev);
1107 int pcie_set_mps(struct pci_dev *dev, int mps);
1108 u32 pcie_bandwidth_available(struct pci_dev *dev, struct pci_dev **limiting_dev,
1109 enum pci_bus_speed *speed,
1110 enum pcie_link_width *width);
1111 void pcie_print_link_status(struct pci_dev *dev);
1112 bool pcie_has_flr(struct pci_dev *dev);
1113 int pcie_flr(struct pci_dev *dev);
1114 int __pci_reset_function_locked(struct pci_dev *dev);
1115 int pci_reset_function(struct pci_dev *dev);
1116 int pci_reset_function_locked(struct pci_dev *dev);
1117 int pci_try_reset_function(struct pci_dev *dev);
1118 int pci_probe_reset_slot(struct pci_slot *slot);
1119 int pci_probe_reset_bus(struct pci_bus *bus);
1120 int pci_reset_bus(struct pci_dev *dev);
1121 void pci_reset_secondary_bus(struct pci_dev *dev);
1122 void pcibios_reset_secondary_bus(struct pci_dev *dev);
1123 void pci_update_resource(struct pci_dev *dev, int resno);
1124 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
1125 int __must_check pci_reassign_resource(struct pci_dev *dev, int i, resource_size_t add_size, resource_size_t align);
1126 void pci_release_resource(struct pci_dev *dev, int resno);
1127 int __must_check pci_resize_resource(struct pci_dev *dev, int i, int size);
1128 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
1129 bool pci_device_is_present(struct pci_dev *pdev);
1130 void pci_ignore_hotplug(struct pci_dev *dev);
1132 int __printf(6, 7) pci_request_irq(struct pci_dev *dev, unsigned int nr,
1133 irq_handler_t handler, irq_handler_t thread_fn, void *dev_id,
1134 const char *fmt, ...);
1135 void pci_free_irq(struct pci_dev *dev, unsigned int nr, void *dev_id);
1137 /* ROM control related routines */
1138 int pci_enable_rom(struct pci_dev *pdev);
1139 void pci_disable_rom(struct pci_dev *pdev);
1140 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
1141 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
1142 void __iomem __must_check *pci_platform_rom(struct pci_dev *pdev, size_t *size);
1144 /* Power management related routines */
1145 int pci_save_state(struct pci_dev *dev);
1146 void pci_restore_state(struct pci_dev *dev);
1147 struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev);
1148 int pci_load_saved_state(struct pci_dev *dev,
1149 struct pci_saved_state *state);
1150 int pci_load_and_free_saved_state(struct pci_dev *dev,
1151 struct pci_saved_state **state);
1152 struct pci_cap_saved_state *pci_find_saved_cap(struct pci_dev *dev, char cap);
1153 struct pci_cap_saved_state *pci_find_saved_ext_cap(struct pci_dev *dev,
1155 int pci_add_cap_save_buffer(struct pci_dev *dev, char cap, unsigned int size);
1156 int pci_add_ext_cap_save_buffer(struct pci_dev *dev,
1157 u16 cap, unsigned int size);
1158 int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state);
1159 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
1160 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
1161 bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
1162 void pci_pme_active(struct pci_dev *dev, bool enable);
1163 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable);
1164 int pci_wake_from_d3(struct pci_dev *dev, bool enable);
1165 int pci_prepare_to_sleep(struct pci_dev *dev);
1166 int pci_back_from_sleep(struct pci_dev *dev);
1167 bool pci_dev_run_wake(struct pci_dev *dev);
1168 bool pci_check_pme_status(struct pci_dev *dev);
1169 void pci_pme_wakeup_bus(struct pci_bus *bus);
1170 void pci_d3cold_enable(struct pci_dev *dev);
1171 void pci_d3cold_disable(struct pci_dev *dev);
1172 bool pcie_relaxed_ordering_enabled(struct pci_dev *dev);
1173 void pci_wakeup_bus(struct pci_bus *bus);
1174 void pci_bus_set_current_state(struct pci_bus *bus, pci_power_t state);
1176 /* PCI Virtual Channel */
1177 int pci_save_vc_state(struct pci_dev *dev);
1178 void pci_restore_vc_state(struct pci_dev *dev);
1179 void pci_allocate_vc_save_buffers(struct pci_dev *dev);
1181 /* For use by arch with custom probe code */
1182 void set_pcie_port_type(struct pci_dev *pdev);
1183 void set_pcie_hotplug_bridge(struct pci_dev *pdev);
1185 /* Functions for PCI Hotplug drivers to use */
1186 int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
1187 unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge);
1188 unsigned int pci_rescan_bus(struct pci_bus *bus);
1189 void pci_lock_rescan_remove(void);
1190 void pci_unlock_rescan_remove(void);
1192 /* Vital Product Data routines */
1193 ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
1194 ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
1195 int pci_set_vpd_size(struct pci_dev *dev, size_t len);
1197 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
1198 resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx);
1199 void pci_bus_assign_resources(const struct pci_bus *bus);
1200 void pci_bus_claim_resources(struct pci_bus *bus);
1201 void pci_bus_size_bridges(struct pci_bus *bus);
1202 int pci_claim_resource(struct pci_dev *, int);
1203 int pci_claim_bridge_resource(struct pci_dev *bridge, int i);
1204 void pci_assign_unassigned_resources(void);
1205 void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
1206 void pci_assign_unassigned_bus_resources(struct pci_bus *bus);
1207 void pci_assign_unassigned_root_bus_resources(struct pci_bus *bus);
1208 int pci_reassign_bridge_resources(struct pci_dev *bridge, unsigned long type);
1209 void pdev_enable_device(struct pci_dev *);
1210 int pci_enable_resources(struct pci_dev *, int mask);
1211 void pci_assign_irq(struct pci_dev *dev);
1212 struct resource *pci_find_resource(struct pci_dev *dev, struct resource *res);
1213 #define HAVE_PCI_REQ_REGIONS 2
1214 int __must_check pci_request_regions(struct pci_dev *, const char *);
1215 int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
1216 void pci_release_regions(struct pci_dev *);
1217 int __must_check pci_request_region(struct pci_dev *, int, const char *);
1218 int __must_check pci_request_region_exclusive(struct pci_dev *, int, const char *);
1219 void pci_release_region(struct pci_dev *, int);
1220 int pci_request_selected_regions(struct pci_dev *, int, const char *);
1221 int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
1222 void pci_release_selected_regions(struct pci_dev *, int);
1224 /* drivers/pci/bus.c */
1225 struct pci_bus *pci_bus_get(struct pci_bus *bus);
1226 void pci_bus_put(struct pci_bus *bus);
1227 void pci_add_resource(struct list_head *resources, struct resource *res);
1228 void pci_add_resource_offset(struct list_head *resources, struct resource *res,
1229 resource_size_t offset);
1230 void pci_free_resource_list(struct list_head *resources);
1231 void pci_bus_add_resource(struct pci_bus *bus, struct resource *res,
1232 unsigned int flags);
1233 struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n);
1234 void pci_bus_remove_resources(struct pci_bus *bus);
1235 int devm_request_pci_bus_resources(struct device *dev,
1236 struct list_head *resources);
1238 #define pci_bus_for_each_resource(bus, res, i) \
1240 (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
1243 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
1244 struct resource *res, resource_size_t size,
1245 resource_size_t align, resource_size_t min,
1246 unsigned long type_mask,
1247 resource_size_t (*alignf)(void *,
1248 const struct resource *,
1254 int pci_register_io_range(struct fwnode_handle *fwnode, phys_addr_t addr,
1255 resource_size_t size);
1256 unsigned long pci_address_to_pio(phys_addr_t addr);
1257 phys_addr_t pci_pio_to_address(unsigned long pio);
1258 int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr);
1259 int devm_pci_remap_iospace(struct device *dev, const struct resource *res,
1260 phys_addr_t phys_addr);
1261 void pci_unmap_iospace(struct resource *res);
1262 void __iomem *devm_pci_remap_cfgspace(struct device *dev,
1263 resource_size_t offset,
1264 resource_size_t size);
1265 void __iomem *devm_pci_remap_cfg_resource(struct device *dev,
1266 struct resource *res);
1268 static inline pci_bus_addr_t pci_bus_address(struct pci_dev *pdev, int bar)
1270 struct pci_bus_region region;
1272 pcibios_resource_to_bus(pdev->bus, ®ion, &pdev->resource[bar]);
1273 return region.start;
1276 /* Proper probing supporting hot-pluggable devices */
1277 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
1278 const char *mod_name);
1280 /* pci_register_driver() must be a macro so KBUILD_MODNAME can be expanded */
1281 #define pci_register_driver(driver) \
1282 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
1284 void pci_unregister_driver(struct pci_driver *dev);
1287 * module_pci_driver() - Helper macro for registering a PCI driver
1288 * @__pci_driver: pci_driver struct
1290 * Helper macro for PCI drivers which do not do anything special in module
1291 * init/exit. This eliminates a lot of boilerplate. Each module may only
1292 * use this macro once, and calling it replaces module_init() and module_exit()
1294 #define module_pci_driver(__pci_driver) \
1295 module_driver(__pci_driver, pci_register_driver, pci_unregister_driver)
1298 * builtin_pci_driver() - Helper macro for registering a PCI driver
1299 * @__pci_driver: pci_driver struct
1301 * Helper macro for PCI drivers which do not do anything special in their
1302 * init code. This eliminates a lot of boilerplate. Each driver may only
1303 * use this macro once, and calling it replaces device_initcall(...)
1305 #define builtin_pci_driver(__pci_driver) \
1306 builtin_driver(__pci_driver, pci_register_driver)
1308 struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
1309 int pci_add_dynid(struct pci_driver *drv,
1310 unsigned int vendor, unsigned int device,
1311 unsigned int subvendor, unsigned int subdevice,
1312 unsigned int class, unsigned int class_mask,
1313 unsigned long driver_data);
1314 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
1315 struct pci_dev *dev);
1316 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
1319 void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
1321 int pci_cfg_space_size(struct pci_dev *dev);
1322 unsigned char pci_bus_max_busnr(struct pci_bus *bus);
1323 void pci_setup_bridge(struct pci_bus *bus);
1324 resource_size_t pcibios_window_alignment(struct pci_bus *bus,
1325 unsigned long type);
1327 #define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
1328 #define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)
1330 int pci_set_vga_state(struct pci_dev *pdev, bool decode,
1331 unsigned int command_bits, u32 flags);
1333 #define PCI_IRQ_LEGACY (1 << 0) /* Allow legacy interrupts */
1334 #define PCI_IRQ_MSI (1 << 1) /* Allow MSI interrupts */
1335 #define PCI_IRQ_MSIX (1 << 2) /* Allow MSI-X interrupts */
1336 #define PCI_IRQ_AFFINITY (1 << 3) /* Auto-assign affinity */
1337 #define PCI_IRQ_ALL_TYPES \
1338 (PCI_IRQ_LEGACY | PCI_IRQ_MSI | PCI_IRQ_MSIX)
1340 /* kmem_cache style wrapper around pci_alloc_consistent() */
1342 #include <linux/pci-dma.h>
1343 #include <linux/dmapool.h>
1345 #define pci_pool dma_pool
1346 #define pci_pool_create(name, pdev, size, align, allocation) \
1347 dma_pool_create(name, &pdev->dev, size, align, allocation)
1348 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
1349 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
1350 #define pci_pool_zalloc(pool, flags, handle) \
1351 dma_pool_zalloc(pool, flags, handle)
1352 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
1355 u32 vector; /* Kernel uses to write allocated vector */
1356 u16 entry; /* Driver uses to specify entry, OS writes */
1359 #ifdef CONFIG_PCI_MSI
1360 int pci_msi_vec_count(struct pci_dev *dev);
1361 void pci_disable_msi(struct pci_dev *dev);
1362 int pci_msix_vec_count(struct pci_dev *dev);
1363 void pci_disable_msix(struct pci_dev *dev);
1364 void pci_restore_msi_state(struct pci_dev *dev);
1365 int pci_msi_enabled(void);
1366 int pci_enable_msi(struct pci_dev *dev);
1367 int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
1368 int minvec, int maxvec);
1369 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1370 struct msix_entry *entries, int nvec)
1372 int rc = pci_enable_msix_range(dev, entries, nvec, nvec);
1377 int pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1378 unsigned int max_vecs, unsigned int flags,
1379 const struct irq_affinity *affd);
1381 void pci_free_irq_vectors(struct pci_dev *dev);
1382 int pci_irq_vector(struct pci_dev *dev, unsigned int nr);
1383 const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev, int vec);
1384 int pci_irq_get_node(struct pci_dev *pdev, int vec);
1387 static inline int pci_msi_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1388 static inline void pci_disable_msi(struct pci_dev *dev) { }
1389 static inline int pci_msix_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1390 static inline void pci_disable_msix(struct pci_dev *dev) { }
1391 static inline void pci_restore_msi_state(struct pci_dev *dev) { }
1392 static inline int pci_msi_enabled(void) { return 0; }
1393 static inline int pci_enable_msi(struct pci_dev *dev)
1395 static inline int pci_enable_msix_range(struct pci_dev *dev,
1396 struct msix_entry *entries, int minvec, int maxvec)
1398 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1399 struct msix_entry *entries, int nvec)
1403 pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1404 unsigned int max_vecs, unsigned int flags,
1405 const struct irq_affinity *aff_desc)
1407 if ((flags & PCI_IRQ_LEGACY) && min_vecs == 1 && dev->irq)
1412 static inline void pci_free_irq_vectors(struct pci_dev *dev)
1416 static inline int pci_irq_vector(struct pci_dev *dev, unsigned int nr)
1418 if (WARN_ON_ONCE(nr > 0))
1422 static inline const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev,
1425 return cpu_possible_mask;
1428 static inline int pci_irq_get_node(struct pci_dev *pdev, int vec)
1430 return first_online_node;
1435 pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs,
1436 unsigned int max_vecs, unsigned int flags)
1438 return pci_alloc_irq_vectors_affinity(dev, min_vecs, max_vecs, flags,
1443 * pci_irqd_intx_xlate() - Translate PCI INTx value to an IRQ domain hwirq
1444 * @d: the INTx IRQ domain
1445 * @node: the DT node for the device whose interrupt we're translating
1446 * @intspec: the interrupt specifier data from the DT
1447 * @intsize: the number of entries in @intspec
1448 * @out_hwirq: pointer at which to write the hwirq number
1449 * @out_type: pointer at which to write the interrupt type
1451 * Translate a PCI INTx interrupt number from device tree in the range 1-4, as
1452 * stored in the standard PCI_INTERRUPT_PIN register, to a value in the range
1453 * 0-3 suitable for use in a 4 entry IRQ domain. That is, subtract one from the
1454 * INTx value to obtain the hwirq number.
1456 * Returns 0 on success, or -EINVAL if the interrupt specifier is out of range.
1458 static inline int pci_irqd_intx_xlate(struct irq_domain *d,
1459 struct device_node *node,
1461 unsigned int intsize,
1462 unsigned long *out_hwirq,
1463 unsigned int *out_type)
1465 const u32 intx = intspec[0];
1467 if (intx < PCI_INTERRUPT_INTA || intx > PCI_INTERRUPT_INTD)
1470 *out_hwirq = intx - PCI_INTERRUPT_INTA;
1474 #ifdef CONFIG_PCIEPORTBUS
1475 extern bool pcie_ports_disabled;
1476 extern bool pcie_ports_native;
1478 #define pcie_ports_disabled true
1479 #define pcie_ports_native false
1482 #ifdef CONFIG_PCIEASPM
1483 bool pcie_aspm_support_enabled(void);
1485 static inline bool pcie_aspm_support_enabled(void) { return false; }
1488 #ifdef CONFIG_PCIEAER
1489 bool pci_aer_available(void);
1491 static inline bool pci_aer_available(void) { return false; }
1494 #ifdef CONFIG_PCIE_ECRC
1495 void pcie_set_ecrc_checking(struct pci_dev *dev);
1496 void pcie_ecrc_get_policy(char *str);
1498 static inline void pcie_set_ecrc_checking(struct pci_dev *dev) { }
1499 static inline void pcie_ecrc_get_policy(char *str) { }
1502 bool pci_ats_disabled(void);
1504 #ifdef CONFIG_PCI_ATS
1505 /* Address Translation Service */
1506 void pci_ats_init(struct pci_dev *dev);
1507 int pci_enable_ats(struct pci_dev *dev, int ps);
1508 void pci_disable_ats(struct pci_dev *dev);
1509 int pci_ats_queue_depth(struct pci_dev *dev);
1511 static inline void pci_ats_init(struct pci_dev *d) { }
1512 static inline int pci_enable_ats(struct pci_dev *d, int ps) { return -ENODEV; }
1513 static inline void pci_disable_ats(struct pci_dev *d) { }
1514 static inline int pci_ats_queue_depth(struct pci_dev *d) { return -ENODEV; }
1517 #ifdef CONFIG_PCIE_PTM
1518 int pci_enable_ptm(struct pci_dev *dev, u8 *granularity);
1520 static inline int pci_enable_ptm(struct pci_dev *dev, u8 *granularity)
1524 void pci_cfg_access_lock(struct pci_dev *dev);
1525 bool pci_cfg_access_trylock(struct pci_dev *dev);
1526 void pci_cfg_access_unlock(struct pci_dev *dev);
1529 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
1530 * a PCI domain is defined to be a set of PCI buses which share
1531 * configuration space.
1533 #ifdef CONFIG_PCI_DOMAINS
1534 extern int pci_domains_supported;
1536 enum { pci_domains_supported = 0 };
1537 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1538 static inline int pci_proc_domain(struct pci_bus *bus) { return 0; }
1539 #endif /* CONFIG_PCI_DOMAINS */
1542 * Generic implementation for PCI domain support. If your
1543 * architecture does not need custom management of PCI
1544 * domains then this implementation will be used
1546 #ifdef CONFIG_PCI_DOMAINS_GENERIC
1547 static inline int pci_domain_nr(struct pci_bus *bus)
1549 return bus->domain_nr;
1552 int acpi_pci_bus_find_domain_nr(struct pci_bus *bus);
1554 static inline int acpi_pci_bus_find_domain_nr(struct pci_bus *bus)
1557 int pci_bus_find_domain_nr(struct pci_bus *bus, struct device *parent);
1560 /* Some architectures require additional setup to direct VGA traffic */
1561 typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
1562 unsigned int command_bits, u32 flags);
1563 void pci_register_set_vga_state(arch_set_vga_state_t func);
1566 pci_request_io_regions(struct pci_dev *pdev, const char *name)
1568 return pci_request_selected_regions(pdev,
1569 pci_select_bars(pdev, IORESOURCE_IO), name);
1573 pci_release_io_regions(struct pci_dev *pdev)
1575 return pci_release_selected_regions(pdev,
1576 pci_select_bars(pdev, IORESOURCE_IO));
1580 pci_request_mem_regions(struct pci_dev *pdev, const char *name)
1582 return pci_request_selected_regions(pdev,
1583 pci_select_bars(pdev, IORESOURCE_MEM), name);
1587 pci_release_mem_regions(struct pci_dev *pdev)
1589 return pci_release_selected_regions(pdev,
1590 pci_select_bars(pdev, IORESOURCE_MEM));
1593 #else /* CONFIG_PCI is not enabled */
1595 static inline void pci_set_flags(int flags) { }
1596 static inline void pci_add_flags(int flags) { }
1597 static inline void pci_clear_flags(int flags) { }
1598 static inline int pci_has_flag(int flag) { return 0; }
1601 * If the system does not have PCI, clearly these return errors. Define
1602 * these as simple inline functions to avoid hair in drivers.
1604 #define _PCI_NOP(o, s, t) \
1605 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
1607 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
1609 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
1610 _PCI_NOP(o, word, u16 x) \
1611 _PCI_NOP(o, dword, u32 x)
1612 _PCI_NOP_ALL(read, *)
1613 _PCI_NOP_ALL(write,)
1615 static inline struct pci_dev *pci_get_device(unsigned int vendor,
1616 unsigned int device,
1617 struct pci_dev *from)
1620 static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
1621 unsigned int device,
1622 unsigned int ss_vendor,
1623 unsigned int ss_device,
1624 struct pci_dev *from)
1627 static inline struct pci_dev *pci_get_class(unsigned int class,
1628 struct pci_dev *from)
1631 #define pci_dev_present(ids) (0)
1632 #define no_pci_devices() (1)
1633 #define pci_dev_put(dev) do { } while (0)
1635 static inline void pci_set_master(struct pci_dev *dev) { }
1636 static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
1637 static inline void pci_disable_device(struct pci_dev *dev) { }
1638 static inline int pci_assign_resource(struct pci_dev *dev, int i)
1640 static inline int __pci_register_driver(struct pci_driver *drv,
1641 struct module *owner)
1643 static inline int pci_register_driver(struct pci_driver *drv)
1645 static inline void pci_unregister_driver(struct pci_driver *drv) { }
1646 static inline int pci_find_capability(struct pci_dev *dev, int cap)
1648 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
1651 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
1654 /* Power management related routines */
1655 static inline int pci_save_state(struct pci_dev *dev) { return 0; }
1656 static inline void pci_restore_state(struct pci_dev *dev) { }
1657 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
1659 static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable)
1661 static inline pci_power_t pci_choose_state(struct pci_dev *dev,
1664 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1668 static inline struct resource *pci_find_resource(struct pci_dev *dev,
1669 struct resource *res)
1671 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
1673 static inline void pci_release_regions(struct pci_dev *dev) { }
1675 static inline unsigned long pci_address_to_pio(phys_addr_t addr) { return -1; }
1677 static inline void pci_block_cfg_access(struct pci_dev *dev) { }
1678 static inline int pci_block_cfg_access_in_atomic(struct pci_dev *dev)
1680 static inline void pci_unblock_cfg_access(struct pci_dev *dev) { }
1682 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
1684 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
1687 static inline struct pci_dev *pci_get_domain_bus_and_slot(int domain,
1688 unsigned int bus, unsigned int devfn)
1691 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1692 static inline struct pci_dev *pci_dev_get(struct pci_dev *dev) { return NULL; }
1694 #define dev_is_pci(d) (false)
1695 #define dev_is_pf(d) (false)
1696 static inline bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags)
1698 static inline int pci_irqd_intx_xlate(struct irq_domain *d,
1699 struct device_node *node,
1701 unsigned int intsize,
1702 unsigned long *out_hwirq,
1703 unsigned int *out_type)
1705 #endif /* CONFIG_PCI */
1707 /* Include architecture-dependent settings and functions */
1709 #include <asm/pci.h>
1711 /* These two functions provide almost identical functionality. Depennding
1712 * on the architecture, one will be implemented as a wrapper around the
1713 * other (in drivers/pci/mmap.c).
1715 * pci_mmap_resource_range() maps a specific BAR, and vm->vm_pgoff
1716 * is expected to be an offset within that region.
1718 * pci_mmap_page_range() is the legacy architecture-specific interface,
1719 * which accepts a "user visible" resource address converted by
1720 * pci_resource_to_user(), as used in the legacy mmap() interface in
1723 int pci_mmap_resource_range(struct pci_dev *dev, int bar,
1724 struct vm_area_struct *vma,
1725 enum pci_mmap_state mmap_state, int write_combine);
1726 int pci_mmap_page_range(struct pci_dev *pdev, int bar,
1727 struct vm_area_struct *vma,
1728 enum pci_mmap_state mmap_state, int write_combine);
1730 #ifndef arch_can_pci_mmap_wc
1731 #define arch_can_pci_mmap_wc() 0
1734 #ifndef arch_can_pci_mmap_io
1735 #define arch_can_pci_mmap_io() 0
1736 #define pci_iobar_pfn(pdev, bar, vma) (-EINVAL)
1738 int pci_iobar_pfn(struct pci_dev *pdev, int bar, struct vm_area_struct *vma);
1741 #ifndef pci_root_bus_fwnode
1742 #define pci_root_bus_fwnode(bus) NULL
1746 * These helpers provide future and backwards compatibility
1747 * for accessing popular PCI BAR info
1749 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
1750 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
1751 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
1752 #define pci_resource_len(dev,bar) \
1753 ((pci_resource_start((dev), (bar)) == 0 && \
1754 pci_resource_end((dev), (bar)) == \
1755 pci_resource_start((dev), (bar))) ? 0 : \
1757 (pci_resource_end((dev), (bar)) - \
1758 pci_resource_start((dev), (bar)) + 1))
1761 * Similar to the helpers above, these manipulate per-pci_dev
1762 * driver-specific data. They are really just a wrapper around
1763 * the generic device structure functions of these calls.
1765 static inline void *pci_get_drvdata(struct pci_dev *pdev)
1767 return dev_get_drvdata(&pdev->dev);
1770 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
1772 dev_set_drvdata(&pdev->dev, data);
1775 static inline const char *pci_name(const struct pci_dev *pdev)
1777 return dev_name(&pdev->dev);
1782 * Some archs don't want to expose struct resource to userland as-is
1783 * in sysfs and /proc
1785 #ifdef HAVE_ARCH_PCI_RESOURCE_TO_USER
1786 void pci_resource_to_user(const struct pci_dev *dev, int bar,
1787 const struct resource *rsrc,
1788 resource_size_t *start, resource_size_t *end);
1790 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
1791 const struct resource *rsrc, resource_size_t *start,
1792 resource_size_t *end)
1794 *start = rsrc->start;
1797 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
1801 * The world is not perfect and supplies us with broken PCI devices.
1802 * For at least a part of these bugs we need a work-around, so both
1803 * generic (drivers/pci/quirks.c) and per-architecture code can define
1804 * fixup hooks to be called for particular buggy devices.
1808 u16 vendor; /* Or PCI_ANY_ID */
1809 u16 device; /* Or PCI_ANY_ID */
1810 u32 class; /* Or PCI_ANY_ID */
1811 unsigned int class_shift; /* should be 0, 8, 16 */
1812 #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
1815 void (*hook)(struct pci_dev *dev);
1819 enum pci_fixup_pass {
1820 pci_fixup_early, /* Before probing BARs */
1821 pci_fixup_header, /* After reading configuration header */
1822 pci_fixup_final, /* Final phase of device fixups */
1823 pci_fixup_enable, /* pci_enable_device() time */
1824 pci_fixup_resume, /* pci_device_resume() */
1825 pci_fixup_suspend, /* pci_device_suspend() */
1826 pci_fixup_resume_early, /* pci_device_resume_early() */
1827 pci_fixup_suspend_late, /* pci_device_suspend_late() */
1830 #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
1831 #define __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1832 class_shift, hook) \
1833 __ADDRESSABLE(hook) \
1834 asm(".section " #sec ", \"a\" \n" \
1836 ".short " #vendor ", " #device " \n" \
1837 ".long " #class ", " #class_shift " \n" \
1838 ".long " #hook " - . \n" \
1840 #define DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1841 class_shift, hook) \
1842 __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
1845 /* Anonymous variables would be nice... */
1846 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \
1847 class_shift, hook) \
1848 static const struct pci_fixup __PASTE(__pci_fixup_##name,__LINE__) __used \
1849 __attribute__((__section__(#section), aligned((sizeof(void *))))) \
1850 = { vendor, device, class, class_shift, hook };
1853 #define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class, \
1854 class_shift, hook) \
1855 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1856 hook, vendor, device, class, class_shift, hook)
1857 #define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class, \
1858 class_shift, hook) \
1859 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1860 hook, vendor, device, class, class_shift, hook)
1861 #define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class, \
1862 class_shift, hook) \
1863 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1864 hook, vendor, device, class, class_shift, hook)
1865 #define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class, \
1866 class_shift, hook) \
1867 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1868 hook, vendor, device, class, class_shift, hook)
1869 #define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class, \
1870 class_shift, hook) \
1871 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1872 resume##hook, vendor, device, class, class_shift, hook)
1873 #define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class, \
1874 class_shift, hook) \
1875 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1876 resume_early##hook, vendor, device, class, class_shift, hook)
1877 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class, \
1878 class_shift, hook) \
1879 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1880 suspend##hook, vendor, device, class, class_shift, hook)
1881 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND_LATE(vendor, device, class, \
1882 class_shift, hook) \
1883 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
1884 suspend_late##hook, vendor, device, class, class_shift, hook)
1886 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
1887 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1888 hook, vendor, device, PCI_ANY_ID, 0, hook)
1889 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
1890 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1891 hook, vendor, device, PCI_ANY_ID, 0, hook)
1892 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
1893 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1894 hook, vendor, device, PCI_ANY_ID, 0, hook)
1895 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
1896 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1897 hook, vendor, device, PCI_ANY_ID, 0, hook)
1898 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
1899 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1900 resume##hook, vendor, device, PCI_ANY_ID, 0, hook)
1901 #define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
1902 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1903 resume_early##hook, vendor, device, PCI_ANY_ID, 0, hook)
1904 #define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
1905 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1906 suspend##hook, vendor, device, PCI_ANY_ID, 0, hook)
1907 #define DECLARE_PCI_FIXUP_SUSPEND_LATE(vendor, device, hook) \
1908 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
1909 suspend_late##hook, vendor, device, PCI_ANY_ID, 0, hook)
1911 #ifdef CONFIG_PCI_QUIRKS
1912 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
1914 static inline void pci_fixup_device(enum pci_fixup_pass pass,
1915 struct pci_dev *dev) { }
1918 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
1919 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
1920 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
1921 int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name);
1922 int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
1924 void pcim_iounmap_regions(struct pci_dev *pdev, int mask);
1926 extern int pci_pci_problems;
1927 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
1928 #define PCIPCI_TRITON 2
1929 #define PCIPCI_NATOMA 4
1930 #define PCIPCI_VIAETBF 8
1931 #define PCIPCI_VSFX 16
1932 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
1933 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
1935 extern unsigned long pci_cardbus_io_size;
1936 extern unsigned long pci_cardbus_mem_size;
1937 extern u8 pci_dfl_cache_line_size;
1938 extern u8 pci_cache_line_size;
1940 extern unsigned long pci_hotplug_io_size;
1941 extern unsigned long pci_hotplug_mem_size;
1942 extern unsigned long pci_hotplug_bus_size;
1944 /* Architecture-specific versions may override these (weak) */
1945 void pcibios_disable_device(struct pci_dev *dev);
1946 void pcibios_set_master(struct pci_dev *dev);
1947 int pcibios_set_pcie_reset_state(struct pci_dev *dev,
1948 enum pcie_reset_state state);
1949 int pcibios_add_device(struct pci_dev *dev);
1950 void pcibios_release_device(struct pci_dev *dev);
1951 void pcibios_penalize_isa_irq(int irq, int active);
1952 int pcibios_alloc_irq(struct pci_dev *dev);
1953 void pcibios_free_irq(struct pci_dev *dev);
1954 resource_size_t pcibios_default_alignment(void);
1956 #ifdef CONFIG_HIBERNATE_CALLBACKS
1957 extern struct dev_pm_ops pcibios_pm_ops;
1960 #if defined(CONFIG_PCI_MMCONFIG) || defined(CONFIG_ACPI_MCFG)
1961 void __init pci_mmcfg_early_init(void);
1962 void __init pci_mmcfg_late_init(void);
1964 static inline void pci_mmcfg_early_init(void) { }
1965 static inline void pci_mmcfg_late_init(void) { }
1968 int pci_ext_cfg_avail(void);
1970 void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
1971 void __iomem *pci_ioremap_wc_bar(struct pci_dev *pdev, int bar);
1973 #ifdef CONFIG_PCI_IOV
1974 int pci_iov_virtfn_bus(struct pci_dev *dev, int id);
1975 int pci_iov_virtfn_devfn(struct pci_dev *dev, int id);
1977 int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
1978 void pci_disable_sriov(struct pci_dev *dev);
1979 int pci_iov_add_virtfn(struct pci_dev *dev, int id);
1980 void pci_iov_remove_virtfn(struct pci_dev *dev, int id);
1981 int pci_num_vf(struct pci_dev *dev);
1982 int pci_vfs_assigned(struct pci_dev *dev);
1983 int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs);
1984 int pci_sriov_get_totalvfs(struct pci_dev *dev);
1985 int pci_sriov_configure_simple(struct pci_dev *dev, int nr_virtfn);
1986 resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno);
1987 void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe);
1989 /* Arch may override these (weak) */
1990 int pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs);
1991 int pcibios_sriov_disable(struct pci_dev *pdev);
1992 resource_size_t pcibios_iov_resource_alignment(struct pci_dev *dev, int resno);
1994 static inline int pci_iov_virtfn_bus(struct pci_dev *dev, int id)
1998 static inline int pci_iov_virtfn_devfn(struct pci_dev *dev, int id)
2002 static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
2004 static inline int pci_iov_add_virtfn(struct pci_dev *dev, int id)
2008 static inline void pci_iov_remove_virtfn(struct pci_dev *dev,
2010 static inline void pci_disable_sriov(struct pci_dev *dev) { }
2011 static inline int pci_num_vf(struct pci_dev *dev) { return 0; }
2012 static inline int pci_vfs_assigned(struct pci_dev *dev)
2014 static inline int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs)
2016 static inline int pci_sriov_get_totalvfs(struct pci_dev *dev)
2018 #define pci_sriov_configure_simple NULL
2019 static inline resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno)
2021 static inline void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe) { }
2024 #if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
2025 void pci_hp_create_module_link(struct pci_slot *pci_slot);
2026 void pci_hp_remove_module_link(struct pci_slot *pci_slot);
2030 * pci_pcie_cap - get the saved PCIe capability offset
2033 * PCIe capability offset is calculated at PCI device initialization
2034 * time and saved in the data structure. This function returns saved
2035 * PCIe capability offset. Using this instead of pci_find_capability()
2036 * reduces unnecessary search in the PCI configuration space. If you
2037 * need to calculate PCIe capability offset from raw device for some
2038 * reasons, please use pci_find_capability() instead.
2040 static inline int pci_pcie_cap(struct pci_dev *dev)
2042 return dev->pcie_cap;
2046 * pci_is_pcie - check if the PCI device is PCI Express capable
2049 * Returns: true if the PCI device is PCI Express capable, false otherwise.
2051 static inline bool pci_is_pcie(struct pci_dev *dev)
2053 return pci_pcie_cap(dev);
2057 * pcie_caps_reg - get the PCIe Capabilities Register
2060 static inline u16 pcie_caps_reg(const struct pci_dev *dev)
2062 return dev->pcie_flags_reg;
2066 * pci_pcie_type - get the PCIe device/port type
2069 static inline int pci_pcie_type(const struct pci_dev *dev)
2071 return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4;
2074 static inline struct pci_dev *pcie_find_root_port(struct pci_dev *dev)
2077 if (!pci_is_pcie(dev))
2079 if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT)
2081 if (!dev->bus->self)
2083 dev = dev->bus->self;
2088 void pci_request_acs(void);
2089 bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags);
2090 bool pci_acs_path_enabled(struct pci_dev *start,
2091 struct pci_dev *end, u16 acs_flags);
2092 int pci_enable_atomic_ops_to_root(struct pci_dev *dev, u32 cap_mask);
2094 #define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */
2095 #define PCI_VPD_LRDT_ID(x) ((x) | PCI_VPD_LRDT)
2097 /* Large Resource Data Type Tag Item Names */
2098 #define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */
2099 #define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */
2100 #define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */
2102 #define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING)
2103 #define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA)
2104 #define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA)
2106 /* Small Resource Data Type Tag Item Names */
2107 #define PCI_VPD_STIN_END 0x0f /* End */
2109 #define PCI_VPD_SRDT_END (PCI_VPD_STIN_END << 3)
2111 #define PCI_VPD_SRDT_TIN_MASK 0x78
2112 #define PCI_VPD_SRDT_LEN_MASK 0x07
2113 #define PCI_VPD_LRDT_TIN_MASK 0x7f
2115 #define PCI_VPD_LRDT_TAG_SIZE 3
2116 #define PCI_VPD_SRDT_TAG_SIZE 1
2118 #define PCI_VPD_INFO_FLD_HDR_SIZE 3
2120 #define PCI_VPD_RO_KEYWORD_PARTNO "PN"
2121 #define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
2122 #define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
2123 #define PCI_VPD_RO_KEYWORD_CHKSUM "RV"
2126 * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length
2127 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
2129 * Returns the extracted Large Resource Data Type length.
2131 static inline u16 pci_vpd_lrdt_size(const u8 *lrdt)
2133 return (u16)lrdt[1] + ((u16)lrdt[2] << 8);
2137 * pci_vpd_lrdt_tag - Extracts the Large Resource Data Type Tag Item
2138 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
2140 * Returns the extracted Large Resource Data Type Tag item.
2142 static inline u16 pci_vpd_lrdt_tag(const u8 *lrdt)
2144 return (u16)(lrdt[0] & PCI_VPD_LRDT_TIN_MASK);
2148 * pci_vpd_srdt_size - Extracts the Small Resource Data Type length
2149 * @srdt: Pointer to the beginning of the Small Resource Data Type tag
2151 * Returns the extracted Small Resource Data Type length.
2153 static inline u8 pci_vpd_srdt_size(const u8 *srdt)
2155 return (*srdt) & PCI_VPD_SRDT_LEN_MASK;
2159 * pci_vpd_srdt_tag - Extracts the Small Resource Data Type Tag Item
2160 * @srdt: Pointer to the beginning of the Small Resource Data Type tag
2162 * Returns the extracted Small Resource Data Type Tag Item.
2164 static inline u8 pci_vpd_srdt_tag(const u8 *srdt)
2166 return ((*srdt) & PCI_VPD_SRDT_TIN_MASK) >> 3;
2170 * pci_vpd_info_field_size - Extracts the information field length
2171 * @lrdt: Pointer to the beginning of an information field header
2173 * Returns the extracted information field length.
2175 static inline u8 pci_vpd_info_field_size(const u8 *info_field)
2177 return info_field[2];
2181 * pci_vpd_find_tag - Locates the Resource Data Type tag provided
2182 * @buf: Pointer to buffered vpd data
2183 * @off: The offset into the buffer at which to begin the search
2184 * @len: The length of the vpd buffer
2185 * @rdt: The Resource Data Type to search for
2187 * Returns the index where the Resource Data Type was found or
2188 * -ENOENT otherwise.
2190 int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt);
2193 * pci_vpd_find_info_keyword - Locates an information field keyword in the VPD
2194 * @buf: Pointer to buffered vpd data
2195 * @off: The offset into the buffer at which to begin the search
2196 * @len: The length of the buffer area, relative to off, in which to search
2197 * @kw: The keyword to search for
2199 * Returns the index where the information field keyword was found or
2200 * -ENOENT otherwise.
2202 int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
2203 unsigned int len, const char *kw);
2205 /* PCI <-> OF binding helpers */
2209 void pci_set_of_node(struct pci_dev *dev);
2210 void pci_release_of_node(struct pci_dev *dev);
2211 void pci_set_bus_of_node(struct pci_bus *bus);
2212 void pci_release_bus_of_node(struct pci_bus *bus);
2213 struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus);
2214 int pci_parse_request_of_pci_ranges(struct device *dev,
2215 struct list_head *resources,
2216 struct resource **bus_range);
2218 /* Arch may override this (weak) */
2219 struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus);
2221 #else /* CONFIG_OF */
2222 static inline void pci_set_of_node(struct pci_dev *dev) { }
2223 static inline void pci_release_of_node(struct pci_dev *dev) { }
2224 static inline void pci_set_bus_of_node(struct pci_bus *bus) { }
2225 static inline void pci_release_bus_of_node(struct pci_bus *bus) { }
2226 static inline struct irq_domain *
2227 pci_host_bridge_of_msi_domain(struct pci_bus *bus) { return NULL; }
2228 static inline int pci_parse_request_of_pci_ranges(struct device *dev,
2229 struct list_head *resources,
2230 struct resource **bus_range)
2234 #endif /* CONFIG_OF */
2236 static inline struct device_node *
2237 pci_device_to_OF_node(const struct pci_dev *pdev)
2239 return pdev ? pdev->dev.of_node : NULL;
2242 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
2244 return bus ? bus->dev.of_node : NULL;
2248 struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus);
2251 pci_msi_register_fwnode_provider(struct fwnode_handle *(*fn)(struct device *));
2253 static inline struct irq_domain *
2254 pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) { return NULL; }
2258 static inline struct eeh_dev *pci_dev_to_eeh_dev(struct pci_dev *pdev)
2260 return pdev->dev.archdata.edev;
2264 void pci_add_dma_alias(struct pci_dev *dev, u8 devfn);
2265 bool pci_devs_are_dma_aliases(struct pci_dev *dev1, struct pci_dev *dev2);
2266 int pci_for_each_dma_alias(struct pci_dev *pdev,
2267 int (*fn)(struct pci_dev *pdev,
2268 u16 alias, void *data), void *data);
2270 /* Helper functions for operation of device flag */
2271 static inline void pci_set_dev_assigned(struct pci_dev *pdev)
2273 pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED;
2275 static inline void pci_clear_dev_assigned(struct pci_dev *pdev)
2277 pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
2279 static inline bool pci_is_dev_assigned(struct pci_dev *pdev)
2281 return (pdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED) == PCI_DEV_FLAGS_ASSIGNED;
2285 * pci_ari_enabled - query ARI forwarding status
2288 * Returns true if ARI forwarding is enabled.
2290 static inline bool pci_ari_enabled(struct pci_bus *bus)
2292 return bus->self && bus->self->ari_enabled;
2296 * pci_is_thunderbolt_attached - whether device is on a Thunderbolt daisy chain
2297 * @pdev: PCI device to check
2299 * Walk upwards from @pdev and check for each encountered bridge if it's part
2300 * of a Thunderbolt controller. Reaching the host bridge means @pdev is not
2301 * Thunderbolt-attached. (But rather soldered to the mainboard usually.)
2303 static inline bool pci_is_thunderbolt_attached(struct pci_dev *pdev)
2305 struct pci_dev *parent = pdev;
2307 if (pdev->is_thunderbolt)
2310 while ((parent = pci_upstream_bridge(parent)))
2311 if (parent->is_thunderbolt)
2317 #if defined(CONFIG_PCIEPORTBUS) || defined(CONFIG_EEH)
2318 void pci_uevent_ers(struct pci_dev *pdev, enum pci_ers_result err_type);
2321 /* Provide the legacy pci_dma_* API */
2322 #include <linux/pci-dma-compat.h>
2324 #define pci_printk(level, pdev, fmt, arg...) \
2325 dev_printk(level, &(pdev)->dev, fmt, ##arg)
2327 #define pci_emerg(pdev, fmt, arg...) dev_emerg(&(pdev)->dev, fmt, ##arg)
2328 #define pci_alert(pdev, fmt, arg...) dev_alert(&(pdev)->dev, fmt, ##arg)
2329 #define pci_crit(pdev, fmt, arg...) dev_crit(&(pdev)->dev, fmt, ##arg)
2330 #define pci_err(pdev, fmt, arg...) dev_err(&(pdev)->dev, fmt, ##arg)
2331 #define pci_warn(pdev, fmt, arg...) dev_warn(&(pdev)->dev, fmt, ##arg)
2332 #define pci_notice(pdev, fmt, arg...) dev_notice(&(pdev)->dev, fmt, ##arg)
2333 #define pci_info(pdev, fmt, arg...) dev_info(&(pdev)->dev, fmt, ##arg)
2334 #define pci_dbg(pdev, fmt, arg...) dev_dbg(&(pdev)->dev, fmt, ##arg)
2336 #endif /* LINUX_PCI_H */