1 /* SPDX-License-Identifier: GPL-2.0 */
5 * PCI defines and function prototypes
6 * Copyright 1994, Drew Eckhardt
7 * Copyright 1997--1999 Martin Mares <mj@ucw.cz>
9 * 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; /* The bus this slot is on */
58 struct list_head list; /* node in list of slots on this bus */
59 struct hotplug_slot *hotplug; /* Hotplug info (migrate over time) */
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 */
76 * For PCI devices, the region numbers are assigned this way:
79 /* #0-5: standard PCI resources */
81 PCI_STD_RESOURCE_END = 5,
83 /* #6: expansion ROM resource */
86 /* device specific resources */
89 PCI_IOV_RESOURCE_END = PCI_IOV_RESOURCES + PCI_SRIOV_NUM_BARS - 1,
92 /* resources assigned to buses behind the bridge */
93 #define PCI_BRIDGE_RESOURCE_NUM 4
96 PCI_BRIDGE_RESOURCE_END = PCI_BRIDGE_RESOURCES +
97 PCI_BRIDGE_RESOURCE_NUM - 1,
99 /* total resources associated with a PCI device */
102 /* preserve this for compatibility */
103 DEVICE_COUNT_RESOURCE = PCI_NUM_RESOURCES,
107 * enum pci_interrupt_pin - PCI INTx interrupt values
108 * @PCI_INTERRUPT_UNKNOWN: Unknown or unassigned interrupt
109 * @PCI_INTERRUPT_INTA: PCI INTA pin
110 * @PCI_INTERRUPT_INTB: PCI INTB pin
111 * @PCI_INTERRUPT_INTC: PCI INTC pin
112 * @PCI_INTERRUPT_INTD: PCI INTD pin
114 * Corresponds to values for legacy PCI INTx interrupts, as can be found in the
115 * PCI_INTERRUPT_PIN register.
117 enum pci_interrupt_pin {
118 PCI_INTERRUPT_UNKNOWN,
125 /* The number of legacy PCI INTx interrupts */
126 #define PCI_NUM_INTX 4
129 * pci_power_t values must match the bits in the Capabilities PME_Support
130 * and Control/Status PowerState fields in the Power Management capability.
132 typedef int __bitwise pci_power_t;
134 #define PCI_D0 ((pci_power_t __force) 0)
135 #define PCI_D1 ((pci_power_t __force) 1)
136 #define PCI_D2 ((pci_power_t __force) 2)
137 #define PCI_D3hot ((pci_power_t __force) 3)
138 #define PCI_D3cold ((pci_power_t __force) 4)
139 #define PCI_UNKNOWN ((pci_power_t __force) 5)
140 #define PCI_POWER_ERROR ((pci_power_t __force) -1)
142 /* Remember to update this when the list above changes! */
143 extern const char *pci_power_names[];
145 static inline const char *pci_power_name(pci_power_t state)
147 return pci_power_names[1 + (__force int) state];
150 #define PCI_PM_D2_DELAY 200
151 #define PCI_PM_D3_WAIT 10
152 #define PCI_PM_D3COLD_WAIT 100
153 #define PCI_PM_BUS_WAIT 50
155 /** The pci_channel state describes connectivity between the CPU and
156 * the pci device. If some PCI bus between here and the pci device
157 * has crashed or locked up, this info is reflected here.
159 typedef unsigned int __bitwise pci_channel_state_t;
161 enum pci_channel_state {
162 /* I/O channel is in normal state */
163 pci_channel_io_normal = (__force pci_channel_state_t) 1,
165 /* I/O to channel is blocked */
166 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
168 /* PCI card is dead */
169 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
172 typedef unsigned int __bitwise pcie_reset_state_t;
174 enum pcie_reset_state {
175 /* Reset is NOT asserted (Use to deassert reset) */
176 pcie_deassert_reset = (__force pcie_reset_state_t) 1,
178 /* Use #PERST to reset PCIe device */
179 pcie_warm_reset = (__force pcie_reset_state_t) 2,
181 /* Use PCIe Hot Reset to reset device */
182 pcie_hot_reset = (__force pcie_reset_state_t) 3
185 typedef unsigned short __bitwise pci_dev_flags_t;
187 /* INTX_DISABLE in PCI_COMMAND register disables MSI
190 PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) (1 << 0),
191 /* Device configuration is irrevocably lost if disabled into D3 */
192 PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) (1 << 1),
193 /* Provide indication device is assigned by a Virtual Machine Manager */
194 PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) (1 << 2),
195 /* Flag for quirk use to store if quirk-specific ACS is enabled */
196 PCI_DEV_FLAGS_ACS_ENABLED_QUIRK = (__force pci_dev_flags_t) (1 << 3),
197 /* Use a PCIe-to-PCI bridge alias even if !pci_is_pcie */
198 PCI_DEV_FLAG_PCIE_BRIDGE_ALIAS = (__force pci_dev_flags_t) (1 << 5),
199 /* Do not use bus resets for device */
200 PCI_DEV_FLAGS_NO_BUS_RESET = (__force pci_dev_flags_t) (1 << 6),
201 /* Do not use PM reset even if device advertises NoSoftRst- */
202 PCI_DEV_FLAGS_NO_PM_RESET = (__force pci_dev_flags_t) (1 << 7),
203 /* Get VPD from function 0 VPD */
204 PCI_DEV_FLAGS_VPD_REF_F0 = (__force pci_dev_flags_t) (1 << 8),
205 /* a non-root bridge where translation occurs, stop alias search here */
206 PCI_DEV_FLAGS_BRIDGE_XLATE_ROOT = (__force pci_dev_flags_t) (1 << 9),
207 /* Do not use FLR even if device advertises PCI_AF_CAP */
208 PCI_DEV_FLAGS_NO_FLR_RESET = (__force pci_dev_flags_t) (1 << 10),
210 * Resume before calling the driver's system suspend hooks, disabling
211 * the direct_complete optimization.
213 PCI_DEV_FLAGS_NEEDS_RESUME = (__force pci_dev_flags_t) (1 << 11),
214 /* Don't use Relaxed Ordering for TLPs directed at this device */
215 PCI_DEV_FLAGS_NO_RELAXED_ORDERING = (__force pci_dev_flags_t) (1 << 12),
218 enum pci_irq_reroute_variant {
219 INTEL_IRQ_REROUTE_VARIANT = 1,
220 MAX_IRQ_REROUTE_VARIANTS = 3
223 typedef unsigned short __bitwise pci_bus_flags_t;
225 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
226 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
227 PCI_BUS_FLAGS_NO_AERSID = (__force pci_bus_flags_t) 4,
230 /* These values come from the PCI Express Spec */
231 enum pcie_link_width {
232 PCIE_LNK_WIDTH_RESRV = 0x00,
240 PCIE_LNK_WIDTH_UNKNOWN = 0xFF,
243 /* Based on the PCI Hotplug Spec, but some values are made up by us */
245 PCI_SPEED_33MHz = 0x00,
246 PCI_SPEED_66MHz = 0x01,
247 PCI_SPEED_66MHz_PCIX = 0x02,
248 PCI_SPEED_100MHz_PCIX = 0x03,
249 PCI_SPEED_133MHz_PCIX = 0x04,
250 PCI_SPEED_66MHz_PCIX_ECC = 0x05,
251 PCI_SPEED_100MHz_PCIX_ECC = 0x06,
252 PCI_SPEED_133MHz_PCIX_ECC = 0x07,
253 PCI_SPEED_66MHz_PCIX_266 = 0x09,
254 PCI_SPEED_100MHz_PCIX_266 = 0x0a,
255 PCI_SPEED_133MHz_PCIX_266 = 0x0b,
261 PCI_SPEED_66MHz_PCIX_533 = 0x11,
262 PCI_SPEED_100MHz_PCIX_533 = 0x12,
263 PCI_SPEED_133MHz_PCIX_533 = 0x13,
264 PCIE_SPEED_2_5GT = 0x14,
265 PCIE_SPEED_5_0GT = 0x15,
266 PCIE_SPEED_8_0GT = 0x16,
267 PCI_SPEED_UNKNOWN = 0xff,
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 is used to describe PCI devices.
292 struct list_head bus_list; /* node in per-bus list */
293 struct pci_bus *bus; /* bus this device is on */
294 struct pci_bus *subordinate; /* bus this device bridges to */
296 void *sysdata; /* hook for sys-specific extension */
297 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
298 struct pci_slot *slot; /* Physical slot this device is in */
300 unsigned int devfn; /* encoded device & function index */
301 unsigned short vendor;
302 unsigned short device;
303 unsigned short subsystem_vendor;
304 unsigned short subsystem_device;
305 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
306 u8 revision; /* PCI revision, low byte of class word */
307 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
308 #ifdef CONFIG_PCIEAER
309 u16 aer_cap; /* AER capability offset */
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; /* which config register controls the ROM */
316 u8 pin; /* which 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; /* which driver has allocated 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-speak,
330 this is D0-D3, D0 being fully functional,
332 u8 pm_cap; /* PM capability offset */
333 unsigned int pme_support:5; /* Bitmask of states from which PME#
335 unsigned int pme_poll:1; /* Poll device's PME status bit */
336 unsigned int d1_support:1; /* Low power state D1 is supported */
337 unsigned int d2_support:1; /* Low power state D2 is supported */
338 unsigned int no_d1d2:1; /* D1 and D2 are forbidden */
339 unsigned int no_d3cold:1; /* D3cold is forbidden */
340 unsigned int bridge_d3:1; /* Allow D3 for bridge */
341 unsigned int d3cold_allowed:1; /* D3cold is allowed by user */
342 unsigned int mmio_always_on:1; /* disallow turning off io/mem
343 decoding during bar sizing */
344 unsigned int wakeup_prepared:1;
345 unsigned int runtime_d3cold:1; /* whether go through runtime
346 D3cold, not set for devices
347 powered on/off by the
348 corresponding bridge */
349 unsigned int ignore_hotplug:1; /* Ignore hotplug events */
350 unsigned int hotplug_user_indicators:1; /* SlotCtl indicators
351 controlled exclusively by
353 unsigned int clear_retrain_link:1; /* Need to clear Retrain Link
355 unsigned int d3_delay; /* D3->D0 transition time in ms */
356 unsigned int d3cold_delay; /* D3cold->D0 transition time in ms */
358 #ifdef CONFIG_PCIEASPM
359 struct pcie_link_state *link_state; /* ASPM link state */
362 pci_channel_state_t error_state; /* current connectivity state */
363 struct device dev; /* Generic device interface */
365 int cfg_size; /* Size of configuration space */
368 * Instead of touching interrupt line and base address registers
369 * directly, use the values stored here. They might be different!
372 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
374 bool match_driver; /* Skip attaching driver */
375 /* These fields are used by common fixups */
376 unsigned int transparent:1; /* Subtractive decode PCI bridge */
377 unsigned int multifunction:1;/* Part of multi-function device */
378 /* keep track of device state */
379 unsigned int is_added:1;
380 unsigned int is_busmaster:1; /* device is busmaster */
381 unsigned int no_msi:1; /* device may not use msi */
382 unsigned int no_64bit_msi:1; /* device may only use 32-bit MSIs */
383 unsigned int block_cfg_access:1; /* config space access is blocked */
384 unsigned int broken_parity_status:1; /* Device generates false positive parity */
385 unsigned int irq_reroute_variant:2; /* device needs IRQ rerouting variant */
386 unsigned int msi_enabled:1;
387 unsigned int msix_enabled:1;
388 unsigned int ari_enabled:1; /* ARI forwarding */
389 unsigned int ats_enabled:1; /* Address Translation Service */
390 unsigned int pasid_enabled:1; /* Process Address Space ID */
391 unsigned int pri_enabled:1; /* Page Request Interface */
392 unsigned int is_managed:1;
393 unsigned int needs_freset:1; /* Dev requires fundamental reset */
394 unsigned int state_saved:1;
395 unsigned int is_physfn:1;
396 unsigned int is_virtfn:1;
397 unsigned int reset_fn:1;
398 unsigned int is_hotplug_bridge:1;
399 unsigned int is_thunderbolt:1; /* Thunderbolt controller */
400 unsigned int __aer_firmware_first_valid:1;
401 unsigned int __aer_firmware_first:1;
402 unsigned int broken_intx_masking:1; /* INTx masking can't be used */
403 unsigned int io_window_1k:1; /* Intel P2P bridge 1K I/O windows */
404 unsigned int irq_managed:1;
405 unsigned int has_secondary_link:1;
406 unsigned int non_compliant_bars:1; /* broken BARs; ignore them */
407 unsigned int is_probed:1; /* device probing in progress */
408 pci_dev_flags_t dev_flags;
409 atomic_t enable_cnt; /* pci_enable_device has been called */
411 u32 saved_config_space[16]; /* config space saved at suspend time */
412 struct hlist_head saved_cap_space;
413 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
414 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
415 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
416 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
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; /* SR-IOV capability related */
430 struct pci_dev *physfn; /* the PF this VF is associated with */
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 of ROM if it's not from the BAR */
443 size_t romlen; /* Length of ROM if it's not from the 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 /* Resource alignment requirements */
483 resource_size_t (*align_resource)(struct pci_dev *dev,
484 const struct resource *res,
485 resource_size_t start,
486 resource_size_t size,
487 resource_size_t align);
488 unsigned long private[0] ____cacheline_aligned;
491 #define to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev)
493 static inline void *pci_host_bridge_priv(struct pci_host_bridge *bridge)
495 return (void *)bridge->private;
498 static inline struct pci_host_bridge *pci_host_bridge_from_priv(void *priv)
500 return container_of(priv, struct pci_host_bridge, private);
503 struct pci_host_bridge *pci_alloc_host_bridge(size_t priv);
504 struct pci_host_bridge *devm_pci_alloc_host_bridge(struct device *dev,
506 void pci_free_host_bridge(struct pci_host_bridge *bridge);
507 struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus);
509 void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
510 void (*release_fn)(struct pci_host_bridge *),
513 int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge);
516 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
517 * to P2P or CardBus bridge windows) go in a table. Additional ones (for
518 * buses below host bridges or subtractive decode bridges) go in the list.
519 * Use pci_bus_for_each_resource() to iterate through all the resources.
523 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly
524 * and there's no way to program the bridge with the details of the window.
525 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive-
526 * decode bit set, because they are explicit and can be programmed with _SRS.
528 #define PCI_SUBTRACTIVE_DECODE 0x1
530 struct pci_bus_resource {
531 struct list_head list;
532 struct resource *res;
536 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
539 struct list_head node; /* node in list of buses */
540 struct pci_bus *parent; /* parent bus this bridge is on */
541 struct list_head children; /* list of child buses */
542 struct list_head devices; /* list of devices on this bus */
543 struct pci_dev *self; /* bridge device as seen by parent */
544 struct list_head slots; /* list of slots on this bus;
545 protected by pci_slot_mutex */
546 struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
547 struct list_head resources; /* address space routed to this bus */
548 struct resource busn_res; /* bus numbers routed to this bus */
550 struct pci_ops *ops; /* configuration access functions */
551 struct msi_controller *msi; /* MSI controller */
552 void *sysdata; /* hook for sys-specific extension */
553 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
555 unsigned char number; /* bus number */
556 unsigned char primary; /* number of primary bridge */
557 unsigned char max_bus_speed; /* enum pci_bus_speed */
558 unsigned char cur_bus_speed; /* enum pci_bus_speed */
559 #ifdef CONFIG_PCI_DOMAINS_GENERIC
565 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
566 pci_bus_flags_t bus_flags; /* inherited by child buses */
567 struct device *bridge;
569 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
570 struct bin_attribute *legacy_mem; /* legacy mem */
571 unsigned int is_added:1;
572 unsigned int unsafe_warn:1; /* warned about RW1C config write */
575 #define to_pci_bus(n) container_of(n, struct pci_bus, dev)
578 * Returns true if the PCI bus is root (behind host-PCI bridge),
581 * Some code assumes that "bus->self == NULL" means that bus is a root bus.
582 * This is incorrect because "virtual" buses added for SR-IOV (via
583 * virtfn_add_bus()) have "bus->self == NULL" but are not root buses.
585 static inline bool pci_is_root_bus(struct pci_bus *pbus)
587 return !(pbus->parent);
591 * pci_is_bridge - check if the PCI device is a bridge
594 * Return true if the PCI device is bridge whether it has subordinate
597 static inline bool pci_is_bridge(struct pci_dev *dev)
599 return dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
600 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS;
603 static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev)
605 dev = pci_physfn(dev);
606 if (pci_is_root_bus(dev->bus))
609 return dev->bus->self;
612 struct device *pci_get_host_bridge_device(struct pci_dev *dev);
613 void pci_put_host_bridge_device(struct device *dev);
615 #ifdef CONFIG_PCI_MSI
616 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
618 return pci_dev->msi_enabled || pci_dev->msix_enabled;
621 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
625 * Error values that may be returned by PCI functions.
627 #define PCIBIOS_SUCCESSFUL 0x00
628 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
629 #define PCIBIOS_BAD_VENDOR_ID 0x83
630 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
631 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
632 #define PCIBIOS_SET_FAILED 0x88
633 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
636 * Translate above to generic errno for passing back through non-PCI code.
638 static inline int pcibios_err_to_errno(int err)
640 if (err <= PCIBIOS_SUCCESSFUL)
641 return err; /* Assume already errno */
644 case PCIBIOS_FUNC_NOT_SUPPORTED:
646 case PCIBIOS_BAD_VENDOR_ID:
648 case PCIBIOS_DEVICE_NOT_FOUND:
650 case PCIBIOS_BAD_REGISTER_NUMBER:
652 case PCIBIOS_SET_FAILED:
654 case PCIBIOS_BUFFER_TOO_SMALL:
661 /* Low-level architecture-dependent routines */
664 int (*add_bus)(struct pci_bus *bus);
665 void (*remove_bus)(struct pci_bus *bus);
666 void __iomem *(*map_bus)(struct pci_bus *bus, unsigned int devfn, int where);
667 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
668 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
672 * ACPI needs to be able to access PCI config space before we've done a
673 * PCI bus scan and created pci_bus structures.
675 int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
676 int reg, int len, u32 *val);
677 int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
678 int reg, int len, u32 val);
680 #ifdef CONFIG_PCI_BUS_ADDR_T_64BIT
681 typedef u64 pci_bus_addr_t;
683 typedef u32 pci_bus_addr_t;
686 struct pci_bus_region {
687 pci_bus_addr_t start;
692 spinlock_t lock; /* protects list, index */
693 struct list_head list; /* for IDs added at runtime */
698 * PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
699 * a set of callbacks in struct pci_error_handlers, that device driver
700 * will be notified of PCI bus errors, and will be driven to recovery
701 * when an error occurs.
704 typedef unsigned int __bitwise pci_ers_result_t;
706 enum pci_ers_result {
707 /* no result/none/not supported in device driver */
708 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
710 /* Device driver can recover without slot reset */
711 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
713 /* Device driver wants slot to be reset. */
714 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
716 /* Device has completely failed, is unrecoverable */
717 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
719 /* Device driver is fully recovered and operational */
720 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
722 /* No AER capabilities registered for the driver */
723 PCI_ERS_RESULT_NO_AER_DRIVER = (__force pci_ers_result_t) 6,
726 /* PCI bus error event callbacks */
727 struct pci_error_handlers {
728 /* PCI bus error detected on this device */
729 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
730 enum pci_channel_state error);
732 /* MMIO has been re-enabled, but not DMA */
733 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
735 /* PCI slot has been reset */
736 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
738 /* PCI function reset prepare or completed */
739 void (*reset_prepare)(struct pci_dev *dev);
740 void (*reset_done)(struct pci_dev *dev);
742 /* Device driver may resume normal operations */
743 void (*resume)(struct pci_dev *dev);
749 struct list_head node;
751 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
752 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
753 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
754 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
755 int (*suspend_late) (struct pci_dev *dev, pm_message_t state);
756 int (*resume_early) (struct pci_dev *dev);
757 int (*resume) (struct pci_dev *dev); /* Device woken up */
758 void (*shutdown) (struct pci_dev *dev);
759 int (*sriov_configure) (struct pci_dev *dev, int num_vfs); /* PF pdev */
760 const struct pci_error_handlers *err_handler;
761 const struct attribute_group **groups;
762 struct device_driver driver;
763 struct pci_dynids dynids;
766 #define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
769 * PCI_DEVICE - macro used to describe a specific pci device
770 * @vend: the 16 bit PCI Vendor ID
771 * @dev: the 16 bit PCI Device ID
773 * This macro is used to create a struct pci_device_id that matches a
774 * specific device. The subvendor and subdevice fields will be set to
777 #define PCI_DEVICE(vend,dev) \
778 .vendor = (vend), .device = (dev), \
779 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
782 * PCI_DEVICE_SUB - macro used to describe a specific pci device with subsystem
783 * @vend: the 16 bit PCI Vendor ID
784 * @dev: the 16 bit PCI Device ID
785 * @subvend: the 16 bit PCI Subvendor ID
786 * @subdev: the 16 bit PCI Subdevice ID
788 * This macro is used to create a struct pci_device_id that matches a
789 * specific device with subsystem information.
791 #define PCI_DEVICE_SUB(vend, dev, subvend, subdev) \
792 .vendor = (vend), .device = (dev), \
793 .subvendor = (subvend), .subdevice = (subdev)
796 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
797 * @dev_class: the class, subclass, prog-if triple for this device
798 * @dev_class_mask: the class mask for this device
800 * This macro is used to create a struct pci_device_id that matches a
801 * specific PCI class. The vendor, device, subvendor, and subdevice
802 * fields will be set to PCI_ANY_ID.
804 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
805 .class = (dev_class), .class_mask = (dev_class_mask), \
806 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
807 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
810 * PCI_VDEVICE - macro used to describe a specific pci device in short form
811 * @vend: the vendor name
812 * @dev: the 16 bit PCI Device ID
814 * This macro is used to create a struct pci_device_id that matches a
815 * specific PCI device. The subvendor, and subdevice fields will be set
816 * to PCI_ANY_ID. The macro allows the next field to follow as the device
820 #define PCI_VDEVICE(vend, dev) \
821 .vendor = PCI_VENDOR_ID_##vend, .device = (dev), \
822 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0
825 PCI_REASSIGN_ALL_RSRC = 0x00000001, /* ignore firmware setup */
826 PCI_REASSIGN_ALL_BUS = 0x00000002, /* reassign all bus numbers */
827 PCI_PROBE_ONLY = 0x00000004, /* use existing setup */
828 PCI_CAN_SKIP_ISA_ALIGN = 0x00000008, /* don't do ISA alignment */
829 PCI_ENABLE_PROC_DOMAINS = 0x00000010, /* enable domains in /proc */
830 PCI_COMPAT_DOMAIN_0 = 0x00000020, /* ... except domain 0 */
831 PCI_SCAN_ALL_PCIE_DEVS = 0x00000040, /* scan all, not just dev 0 */
834 /* these external functions are only available when PCI support is enabled */
837 extern unsigned int pci_flags;
839 static inline void pci_set_flags(int flags) { pci_flags = flags; }
840 static inline void pci_add_flags(int flags) { pci_flags |= flags; }
841 static inline void pci_clear_flags(int flags) { pci_flags &= ~flags; }
842 static inline int pci_has_flag(int flag) { return pci_flags & flag; }
844 void pcie_bus_configure_settings(struct pci_bus *bus);
846 enum pcie_bus_config_types {
847 PCIE_BUS_TUNE_OFF, /* don't touch MPS at all */
848 PCIE_BUS_DEFAULT, /* ensure MPS matches upstream bridge */
849 PCIE_BUS_SAFE, /* use largest MPS boot-time devices support */
850 PCIE_BUS_PERFORMANCE, /* use MPS and MRRS for best performance */
851 PCIE_BUS_PEER2PEER, /* set MPS = 128 for all devices */
854 extern enum pcie_bus_config_types pcie_bus_config;
856 extern struct bus_type pci_bus_type;
858 /* Do NOT directly access these two variables, unless you are arch-specific PCI
859 * code, or PCI core code. */
860 extern struct list_head pci_root_buses; /* list of all known PCI buses */
861 /* Some device drivers need know if PCI is initiated */
862 int no_pci_devices(void);
864 void pcibios_resource_survey_bus(struct pci_bus *bus);
865 void pcibios_bus_add_device(struct pci_dev *pdev);
866 void pcibios_add_bus(struct pci_bus *bus);
867 void pcibios_remove_bus(struct pci_bus *bus);
868 void pcibios_fixup_bus(struct pci_bus *);
869 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
870 /* Architecture-specific versions may override this (weak) */
871 char *pcibios_setup(char *str);
873 /* Used only when drivers/pci/setup.c is used */
874 resource_size_t pcibios_align_resource(void *, const struct resource *,
878 /* Weak but can be overriden by arch */
879 void pci_fixup_cardbus(struct pci_bus *);
881 /* Generic PCI functions used internally */
883 void pcibios_resource_to_bus(struct pci_bus *bus, struct pci_bus_region *region,
884 struct resource *res);
885 void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
886 struct pci_bus_region *region);
887 void pcibios_scan_specific_bus(int busn);
888 struct pci_bus *pci_find_bus(int domain, int busnr);
889 void pci_bus_add_devices(const struct pci_bus *bus);
890 struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
891 struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
892 struct pci_ops *ops, void *sysdata,
893 struct list_head *resources);
894 int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
895 int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax);
896 void pci_bus_release_busn_res(struct pci_bus *b);
897 struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
898 struct pci_ops *ops, void *sysdata,
899 struct list_head *resources);
900 int pci_scan_root_bus_bridge(struct pci_host_bridge *bridge);
901 struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
903 void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
904 struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
906 struct hotplug_slot *hotplug);
907 void pci_destroy_slot(struct pci_slot *slot);
909 void pci_dev_assign_slot(struct pci_dev *dev);
911 static inline void pci_dev_assign_slot(struct pci_dev *dev) { }
913 int pci_scan_slot(struct pci_bus *bus, int devfn);
914 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
915 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
916 unsigned int pci_scan_child_bus(struct pci_bus *bus);
917 void pci_bus_add_device(struct pci_dev *dev);
918 void pci_read_bridge_bases(struct pci_bus *child);
919 struct resource *pci_find_parent_resource(const struct pci_dev *dev,
920 struct resource *res);
921 struct pci_dev *pci_find_pcie_root_port(struct pci_dev *dev);
922 u8 pci_swizzle_interrupt_pin(const struct pci_dev *dev, u8 pin);
923 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
924 u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
925 struct pci_dev *pci_dev_get(struct pci_dev *dev);
926 void pci_dev_put(struct pci_dev *dev);
927 void pci_remove_bus(struct pci_bus *b);
928 void pci_stop_and_remove_bus_device(struct pci_dev *dev);
929 void pci_stop_and_remove_bus_device_locked(struct pci_dev *dev);
930 void pci_stop_root_bus(struct pci_bus *bus);
931 void pci_remove_root_bus(struct pci_bus *bus);
932 void pci_setup_cardbus(struct pci_bus *bus);
933 void pcibios_setup_bridge(struct pci_bus *bus, unsigned long type);
934 void pci_sort_breadthfirst(void);
935 #define dev_is_pci(d) ((d)->bus == &pci_bus_type)
936 #define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false))
938 /* Generic PCI functions exported to card drivers */
940 enum pci_lost_interrupt_reason {
941 PCI_LOST_IRQ_NO_INFORMATION = 0,
942 PCI_LOST_IRQ_DISABLE_MSI,
943 PCI_LOST_IRQ_DISABLE_MSIX,
944 PCI_LOST_IRQ_DISABLE_ACPI,
946 enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *dev);
947 int pci_find_capability(struct pci_dev *dev, int cap);
948 int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
949 int pci_find_ext_capability(struct pci_dev *dev, int cap);
950 int pci_find_next_ext_capability(struct pci_dev *dev, int pos, int cap);
951 int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
952 int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
953 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
955 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
956 struct pci_dev *from);
957 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
958 unsigned int ss_vendor, unsigned int ss_device,
959 struct pci_dev *from);
960 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
961 struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
963 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
966 return pci_get_domain_bus_and_slot(0, bus, devfn);
968 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
969 int pci_dev_present(const struct pci_device_id *ids);
971 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
973 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
974 int where, u16 *val);
975 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
976 int where, u32 *val);
977 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
979 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
981 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
984 int pci_generic_config_read(struct pci_bus *bus, unsigned int devfn,
985 int where, int size, u32 *val);
986 int pci_generic_config_write(struct pci_bus *bus, unsigned int devfn,
987 int where, int size, u32 val);
988 int pci_generic_config_read32(struct pci_bus *bus, unsigned int devfn,
989 int where, int size, u32 *val);
990 int pci_generic_config_write32(struct pci_bus *bus, unsigned int devfn,
991 int where, int size, u32 val);
993 struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
995 int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val);
996 int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val);
997 int pci_read_config_dword(const struct pci_dev *dev, int where, u32 *val);
998 int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val);
999 int pci_write_config_word(const struct pci_dev *dev, int where, u16 val);
1000 int pci_write_config_dword(const struct pci_dev *dev, int where, u32 val);
1002 int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val);
1003 int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val);
1004 int pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val);
1005 int pcie_capability_write_dword(struct pci_dev *dev, int pos, u32 val);
1006 int pcie_capability_clear_and_set_word(struct pci_dev *dev, int pos,
1007 u16 clear, u16 set);
1008 int pcie_capability_clear_and_set_dword(struct pci_dev *dev, int pos,
1009 u32 clear, u32 set);
1011 static inline int pcie_capability_set_word(struct pci_dev *dev, int pos,
1014 return pcie_capability_clear_and_set_word(dev, pos, 0, set);
1017 static inline int pcie_capability_set_dword(struct pci_dev *dev, int pos,
1020 return pcie_capability_clear_and_set_dword(dev, pos, 0, set);
1023 static inline int pcie_capability_clear_word(struct pci_dev *dev, int pos,
1026 return pcie_capability_clear_and_set_word(dev, pos, clear, 0);
1029 static inline int pcie_capability_clear_dword(struct pci_dev *dev, int pos,
1032 return pcie_capability_clear_and_set_dword(dev, pos, clear, 0);
1035 /* user-space driven config access */
1036 int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
1037 int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
1038 int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val);
1039 int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val);
1040 int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val);
1041 int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val);
1043 int __must_check pci_enable_device(struct pci_dev *dev);
1044 int __must_check pci_enable_device_io(struct pci_dev *dev);
1045 int __must_check pci_enable_device_mem(struct pci_dev *dev);
1046 int __must_check pci_reenable_device(struct pci_dev *);
1047 int __must_check pcim_enable_device(struct pci_dev *pdev);
1048 void pcim_pin_device(struct pci_dev *pdev);
1050 static inline bool pci_intx_mask_supported(struct pci_dev *pdev)
1053 * INTx masking is supported if PCI_COMMAND_INTX_DISABLE is
1054 * writable and no quirk has marked the feature broken.
1056 return !pdev->broken_intx_masking;
1059 static inline int pci_is_enabled(struct pci_dev *pdev)
1061 return (atomic_read(&pdev->enable_cnt) > 0);
1064 static inline int pci_is_managed(struct pci_dev *pdev)
1066 return pdev->is_managed;
1069 void pci_disable_device(struct pci_dev *dev);
1071 extern unsigned int pcibios_max_latency;
1072 void pci_set_master(struct pci_dev *dev);
1073 void pci_clear_master(struct pci_dev *dev);
1075 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
1076 int pci_set_cacheline_size(struct pci_dev *dev);
1077 #define HAVE_PCI_SET_MWI
1078 int __must_check pci_set_mwi(struct pci_dev *dev);
1079 int pci_try_set_mwi(struct pci_dev *dev);
1080 void pci_clear_mwi(struct pci_dev *dev);
1081 void pci_intx(struct pci_dev *dev, int enable);
1082 bool pci_check_and_mask_intx(struct pci_dev *dev);
1083 bool pci_check_and_unmask_intx(struct pci_dev *dev);
1084 int pci_wait_for_pending(struct pci_dev *dev, int pos, u16 mask);
1085 int pci_wait_for_pending_transaction(struct pci_dev *dev);
1086 int pcix_get_max_mmrbc(struct pci_dev *dev);
1087 int pcix_get_mmrbc(struct pci_dev *dev);
1088 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
1089 int pcie_get_readrq(struct pci_dev *dev);
1090 int pcie_set_readrq(struct pci_dev *dev, int rq);
1091 int pcie_get_mps(struct pci_dev *dev);
1092 int pcie_set_mps(struct pci_dev *dev, int mps);
1093 int pcie_get_minimum_link(struct pci_dev *dev, enum pci_bus_speed *speed,
1094 enum pcie_link_width *width);
1095 void pcie_flr(struct pci_dev *dev);
1096 int __pci_reset_function(struct pci_dev *dev);
1097 int __pci_reset_function_locked(struct pci_dev *dev);
1098 int pci_reset_function(struct pci_dev *dev);
1099 int pci_reset_function_locked(struct pci_dev *dev);
1100 int pci_try_reset_function(struct pci_dev *dev);
1101 int pci_probe_reset_slot(struct pci_slot *slot);
1102 int pci_reset_slot(struct pci_slot *slot);
1103 int pci_try_reset_slot(struct pci_slot *slot);
1104 int pci_probe_reset_bus(struct pci_bus *bus);
1105 int pci_reset_bus(struct pci_bus *bus);
1106 int pci_try_reset_bus(struct pci_bus *bus);
1107 void pci_reset_secondary_bus(struct pci_dev *dev);
1108 void pcibios_reset_secondary_bus(struct pci_dev *dev);
1109 void pci_reset_bridge_secondary_bus(struct pci_dev *dev);
1110 void pci_update_resource(struct pci_dev *dev, int resno);
1111 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
1112 int __must_check pci_reassign_resource(struct pci_dev *dev, int i, resource_size_t add_size, resource_size_t align);
1113 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
1114 bool pci_device_is_present(struct pci_dev *pdev);
1115 void pci_ignore_hotplug(struct pci_dev *dev);
1117 int __printf(6, 7) pci_request_irq(struct pci_dev *dev, unsigned int nr,
1118 irq_handler_t handler, irq_handler_t thread_fn, void *dev_id,
1119 const char *fmt, ...);
1120 void pci_free_irq(struct pci_dev *dev, unsigned int nr, void *dev_id);
1122 /* ROM control related routines */
1123 int pci_enable_rom(struct pci_dev *pdev);
1124 void pci_disable_rom(struct pci_dev *pdev);
1125 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
1126 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
1127 size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size);
1128 void __iomem __must_check *pci_platform_rom(struct pci_dev *pdev, size_t *size);
1130 /* Power management related routines */
1131 int pci_save_state(struct pci_dev *dev);
1132 void pci_restore_state(struct pci_dev *dev);
1133 struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev);
1134 int pci_load_saved_state(struct pci_dev *dev,
1135 struct pci_saved_state *state);
1136 int pci_load_and_free_saved_state(struct pci_dev *dev,
1137 struct pci_saved_state **state);
1138 struct pci_cap_saved_state *pci_find_saved_cap(struct pci_dev *dev, char cap);
1139 struct pci_cap_saved_state *pci_find_saved_ext_cap(struct pci_dev *dev,
1141 int pci_add_cap_save_buffer(struct pci_dev *dev, char cap, unsigned int size);
1142 int pci_add_ext_cap_save_buffer(struct pci_dev *dev,
1143 u16 cap, unsigned int size);
1144 int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state);
1145 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
1146 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
1147 bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
1148 void pci_pme_active(struct pci_dev *dev, bool enable);
1149 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable);
1150 int pci_wake_from_d3(struct pci_dev *dev, bool enable);
1151 int pci_prepare_to_sleep(struct pci_dev *dev);
1152 int pci_back_from_sleep(struct pci_dev *dev);
1153 bool pci_dev_run_wake(struct pci_dev *dev);
1154 bool pci_check_pme_status(struct pci_dev *dev);
1155 void pci_pme_wakeup_bus(struct pci_bus *bus);
1156 void pci_d3cold_enable(struct pci_dev *dev);
1157 void pci_d3cold_disable(struct pci_dev *dev);
1158 bool pcie_relaxed_ordering_enabled(struct pci_dev *dev);
1160 /* PCI Virtual Channel */
1161 int pci_save_vc_state(struct pci_dev *dev);
1162 void pci_restore_vc_state(struct pci_dev *dev);
1163 void pci_allocate_vc_save_buffers(struct pci_dev *dev);
1165 /* For use by arch with custom probe code */
1166 void set_pcie_port_type(struct pci_dev *pdev);
1167 void set_pcie_hotplug_bridge(struct pci_dev *pdev);
1169 /* Functions for PCI Hotplug drivers to use */
1170 int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
1171 unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge);
1172 unsigned int pci_rescan_bus(struct pci_bus *bus);
1173 void pci_lock_rescan_remove(void);
1174 void pci_unlock_rescan_remove(void);
1176 /* Vital product data routines */
1177 ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
1178 ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
1179 int pci_set_vpd_size(struct pci_dev *dev, size_t len);
1181 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
1182 resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx);
1183 void pci_bus_assign_resources(const struct pci_bus *bus);
1184 void pci_bus_claim_resources(struct pci_bus *bus);
1185 void pci_bus_size_bridges(struct pci_bus *bus);
1186 int pci_claim_resource(struct pci_dev *, int);
1187 int pci_claim_bridge_resource(struct pci_dev *bridge, int i);
1188 void pci_assign_unassigned_resources(void);
1189 void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
1190 void pci_assign_unassigned_bus_resources(struct pci_bus *bus);
1191 void pci_assign_unassigned_root_bus_resources(struct pci_bus *bus);
1192 void pdev_enable_device(struct pci_dev *);
1193 int pci_enable_resources(struct pci_dev *, int mask);
1194 void pci_assign_irq(struct pci_dev *dev);
1195 struct resource *pci_find_resource(struct pci_dev *dev, struct resource *res);
1196 #define HAVE_PCI_REQ_REGIONS 2
1197 int __must_check pci_request_regions(struct pci_dev *, const char *);
1198 int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
1199 void pci_release_regions(struct pci_dev *);
1200 int __must_check pci_request_region(struct pci_dev *, int, const char *);
1201 int __must_check pci_request_region_exclusive(struct pci_dev *, int, const char *);
1202 void pci_release_region(struct pci_dev *, int);
1203 int pci_request_selected_regions(struct pci_dev *, int, const char *);
1204 int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
1205 void pci_release_selected_regions(struct pci_dev *, int);
1207 /* drivers/pci/bus.c */
1208 struct pci_bus *pci_bus_get(struct pci_bus *bus);
1209 void pci_bus_put(struct pci_bus *bus);
1210 void pci_add_resource(struct list_head *resources, struct resource *res);
1211 void pci_add_resource_offset(struct list_head *resources, struct resource *res,
1212 resource_size_t offset);
1213 void pci_free_resource_list(struct list_head *resources);
1214 void pci_bus_add_resource(struct pci_bus *bus, struct resource *res,
1215 unsigned int flags);
1216 struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n);
1217 void pci_bus_remove_resources(struct pci_bus *bus);
1218 int devm_request_pci_bus_resources(struct device *dev,
1219 struct list_head *resources);
1221 #define pci_bus_for_each_resource(bus, res, i) \
1223 (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
1226 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
1227 struct resource *res, resource_size_t size,
1228 resource_size_t align, resource_size_t min,
1229 unsigned long type_mask,
1230 resource_size_t (*alignf)(void *,
1231 const struct resource *,
1237 int pci_register_io_range(phys_addr_t addr, resource_size_t size);
1238 unsigned long pci_address_to_pio(phys_addr_t addr);
1239 phys_addr_t pci_pio_to_address(unsigned long pio);
1240 int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr);
1241 int devm_pci_remap_iospace(struct device *dev, const struct resource *res,
1242 phys_addr_t phys_addr);
1243 void pci_unmap_iospace(struct resource *res);
1244 void __iomem *devm_pci_remap_cfgspace(struct device *dev,
1245 resource_size_t offset,
1246 resource_size_t size);
1247 void __iomem *devm_pci_remap_cfg_resource(struct device *dev,
1248 struct resource *res);
1250 static inline pci_bus_addr_t pci_bus_address(struct pci_dev *pdev, int bar)
1252 struct pci_bus_region region;
1254 pcibios_resource_to_bus(pdev->bus, ®ion, &pdev->resource[bar]);
1255 return region.start;
1258 /* Proper probing supporting hot-pluggable devices */
1259 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
1260 const char *mod_name);
1263 * pci_register_driver must be a macro so that KBUILD_MODNAME can be expanded
1265 #define pci_register_driver(driver) \
1266 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
1268 void pci_unregister_driver(struct pci_driver *dev);
1271 * module_pci_driver() - Helper macro for registering a PCI driver
1272 * @__pci_driver: pci_driver struct
1274 * Helper macro for PCI drivers which do not do anything special in module
1275 * init/exit. This eliminates a lot of boilerplate. Each module may only
1276 * use this macro once, and calling it replaces module_init() and module_exit()
1278 #define module_pci_driver(__pci_driver) \
1279 module_driver(__pci_driver, pci_register_driver, \
1280 pci_unregister_driver)
1283 * builtin_pci_driver() - Helper macro for registering a PCI driver
1284 * @__pci_driver: pci_driver struct
1286 * Helper macro for PCI drivers which do not do anything special in their
1287 * init code. This eliminates a lot of boilerplate. Each driver may only
1288 * use this macro once, and calling it replaces device_initcall(...)
1290 #define builtin_pci_driver(__pci_driver) \
1291 builtin_driver(__pci_driver, pci_register_driver)
1293 struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
1294 int pci_add_dynid(struct pci_driver *drv,
1295 unsigned int vendor, unsigned int device,
1296 unsigned int subvendor, unsigned int subdevice,
1297 unsigned int class, unsigned int class_mask,
1298 unsigned long driver_data);
1299 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
1300 struct pci_dev *dev);
1301 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
1304 void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
1306 int pci_cfg_space_size(struct pci_dev *dev);
1307 unsigned char pci_bus_max_busnr(struct pci_bus *bus);
1308 void pci_setup_bridge(struct pci_bus *bus);
1309 resource_size_t pcibios_window_alignment(struct pci_bus *bus,
1310 unsigned long type);
1311 resource_size_t pcibios_iov_resource_alignment(struct pci_dev *dev, int resno);
1313 #define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
1314 #define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)
1316 int pci_set_vga_state(struct pci_dev *pdev, bool decode,
1317 unsigned int command_bits, u32 flags);
1319 #define PCI_IRQ_LEGACY (1 << 0) /* allow legacy interrupts */
1320 #define PCI_IRQ_MSI (1 << 1) /* allow MSI interrupts */
1321 #define PCI_IRQ_MSIX (1 << 2) /* allow MSI-X interrupts */
1322 #define PCI_IRQ_AFFINITY (1 << 3) /* auto-assign affinity */
1323 #define PCI_IRQ_ALL_TYPES \
1324 (PCI_IRQ_LEGACY | PCI_IRQ_MSI | PCI_IRQ_MSIX)
1326 /* kmem_cache style wrapper around pci_alloc_consistent() */
1328 #include <linux/pci-dma.h>
1329 #include <linux/dmapool.h>
1331 #define pci_pool dma_pool
1332 #define pci_pool_create(name, pdev, size, align, allocation) \
1333 dma_pool_create(name, &pdev->dev, size, align, allocation)
1334 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
1335 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
1336 #define pci_pool_zalloc(pool, flags, handle) \
1337 dma_pool_zalloc(pool, flags, handle)
1338 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
1341 u32 vector; /* kernel uses to write allocated vector */
1342 u16 entry; /* driver uses to specify entry, OS writes */
1345 #ifdef CONFIG_PCI_MSI
1346 int pci_msi_vec_count(struct pci_dev *dev);
1347 void pci_disable_msi(struct pci_dev *dev);
1348 int pci_msix_vec_count(struct pci_dev *dev);
1349 void pci_disable_msix(struct pci_dev *dev);
1350 void pci_restore_msi_state(struct pci_dev *dev);
1351 int pci_msi_enabled(void);
1352 int pci_enable_msi(struct pci_dev *dev);
1353 int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
1354 int minvec, int maxvec);
1355 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1356 struct msix_entry *entries, int nvec)
1358 int rc = pci_enable_msix_range(dev, entries, nvec, nvec);
1363 int pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1364 unsigned int max_vecs, unsigned int flags,
1365 const struct irq_affinity *affd);
1367 void pci_free_irq_vectors(struct pci_dev *dev);
1368 int pci_irq_vector(struct pci_dev *dev, unsigned int nr);
1369 const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev, int vec);
1370 int pci_irq_get_node(struct pci_dev *pdev, int vec);
1373 static inline int pci_msi_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1374 static inline void pci_disable_msi(struct pci_dev *dev) { }
1375 static inline int pci_msix_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1376 static inline void pci_disable_msix(struct pci_dev *dev) { }
1377 static inline void pci_restore_msi_state(struct pci_dev *dev) { }
1378 static inline int pci_msi_enabled(void) { return 0; }
1379 static inline int pci_enable_msi(struct pci_dev *dev)
1381 static inline int pci_enable_msix_range(struct pci_dev *dev,
1382 struct msix_entry *entries, int minvec, int maxvec)
1384 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1385 struct msix_entry *entries, int nvec)
1389 pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1390 unsigned int max_vecs, unsigned int flags,
1391 const struct irq_affinity *aff_desc)
1393 if ((flags & PCI_IRQ_LEGACY) && min_vecs == 1 && dev->irq)
1398 static inline void pci_free_irq_vectors(struct pci_dev *dev)
1402 static inline int pci_irq_vector(struct pci_dev *dev, unsigned int nr)
1404 if (WARN_ON_ONCE(nr > 0))
1408 static inline const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev,
1411 return cpu_possible_mask;
1414 static inline int pci_irq_get_node(struct pci_dev *pdev, int vec)
1416 return first_online_node;
1421 pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs,
1422 unsigned int max_vecs, unsigned int flags)
1424 return pci_alloc_irq_vectors_affinity(dev, min_vecs, max_vecs, flags,
1429 * pci_irqd_intx_xlate() - Translate PCI INTx value to an IRQ domain hwirq
1430 * @d: the INTx IRQ domain
1431 * @node: the DT node for the device whose interrupt we're translating
1432 * @intspec: the interrupt specifier data from the DT
1433 * @intsize: the number of entries in @intspec
1434 * @out_hwirq: pointer at which to write the hwirq number
1435 * @out_type: pointer at which to write the interrupt type
1437 * Translate a PCI INTx interrupt number from device tree in the range 1-4, as
1438 * stored in the standard PCI_INTERRUPT_PIN register, to a value in the range
1439 * 0-3 suitable for use in a 4 entry IRQ domain. That is, subtract one from the
1440 * INTx value to obtain the hwirq number.
1442 * Returns 0 on success, or -EINVAL if the interrupt specifier is out of range.
1444 static inline int pci_irqd_intx_xlate(struct irq_domain *d,
1445 struct device_node *node,
1447 unsigned int intsize,
1448 unsigned long *out_hwirq,
1449 unsigned int *out_type)
1451 const u32 intx = intspec[0];
1453 if (intx < PCI_INTERRUPT_INTA || intx > PCI_INTERRUPT_INTD)
1456 *out_hwirq = intx - PCI_INTERRUPT_INTA;
1460 #ifdef CONFIG_PCIEPORTBUS
1461 extern bool pcie_ports_disabled;
1462 extern bool pcie_ports_auto;
1464 #define pcie_ports_disabled true
1465 #define pcie_ports_auto false
1468 #ifdef CONFIG_PCIEASPM
1469 bool pcie_aspm_support_enabled(void);
1471 static inline bool pcie_aspm_support_enabled(void) { return false; }
1474 #ifdef CONFIG_PCIEAER
1475 void pci_no_aer(void);
1476 bool pci_aer_available(void);
1477 int pci_aer_init(struct pci_dev *dev);
1479 static inline void pci_no_aer(void) { }
1480 static inline bool pci_aer_available(void) { return false; }
1481 static inline int pci_aer_init(struct pci_dev *d) { return -ENODEV; }
1484 #ifdef CONFIG_PCIE_ECRC
1485 void pcie_set_ecrc_checking(struct pci_dev *dev);
1486 void pcie_ecrc_get_policy(char *str);
1488 static inline void pcie_set_ecrc_checking(struct pci_dev *dev) { }
1489 static inline void pcie_ecrc_get_policy(char *str) { }
1492 #ifdef CONFIG_HT_IRQ
1493 /* The functions a driver should call */
1494 int ht_create_irq(struct pci_dev *dev, int idx);
1495 void ht_destroy_irq(unsigned int irq);
1496 #endif /* CONFIG_HT_IRQ */
1498 #ifdef CONFIG_PCI_ATS
1499 /* Address Translation Service */
1500 void pci_ats_init(struct pci_dev *dev);
1501 int pci_enable_ats(struct pci_dev *dev, int ps);
1502 void pci_disable_ats(struct pci_dev *dev);
1503 int pci_ats_queue_depth(struct pci_dev *dev);
1505 static inline void pci_ats_init(struct pci_dev *d) { }
1506 static inline int pci_enable_ats(struct pci_dev *d, int ps) { return -ENODEV; }
1507 static inline void pci_disable_ats(struct pci_dev *d) { }
1508 static inline int pci_ats_queue_depth(struct pci_dev *d) { return -ENODEV; }
1511 #ifdef CONFIG_PCIE_PTM
1512 int pci_enable_ptm(struct pci_dev *dev, u8 *granularity);
1514 static inline int pci_enable_ptm(struct pci_dev *dev, u8 *granularity)
1518 void pci_cfg_access_lock(struct pci_dev *dev);
1519 bool pci_cfg_access_trylock(struct pci_dev *dev);
1520 void pci_cfg_access_unlock(struct pci_dev *dev);
1523 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
1524 * a PCI domain is defined to be a set of PCI buses which share
1525 * configuration space.
1527 #ifdef CONFIG_PCI_DOMAINS
1528 extern int pci_domains_supported;
1529 int pci_get_new_domain_nr(void);
1531 enum { pci_domains_supported = 0 };
1532 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1533 static inline int pci_proc_domain(struct pci_bus *bus) { return 0; }
1534 static inline int pci_get_new_domain_nr(void) { return -ENOSYS; }
1535 #endif /* CONFIG_PCI_DOMAINS */
1538 * Generic implementation for PCI domain support. If your
1539 * architecture does not need custom management of PCI
1540 * domains then this implementation will be used
1542 #ifdef CONFIG_PCI_DOMAINS_GENERIC
1543 static inline int pci_domain_nr(struct pci_bus *bus)
1545 return bus->domain_nr;
1548 int acpi_pci_bus_find_domain_nr(struct pci_bus *bus);
1550 static inline int acpi_pci_bus_find_domain_nr(struct pci_bus *bus)
1553 int pci_bus_find_domain_nr(struct pci_bus *bus, struct device *parent);
1556 /* some architectures require additional setup to direct VGA traffic */
1557 typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
1558 unsigned int command_bits, u32 flags);
1559 void pci_register_set_vga_state(arch_set_vga_state_t func);
1562 pci_request_io_regions(struct pci_dev *pdev, const char *name)
1564 return pci_request_selected_regions(pdev,
1565 pci_select_bars(pdev, IORESOURCE_IO), name);
1569 pci_release_io_regions(struct pci_dev *pdev)
1571 return pci_release_selected_regions(pdev,
1572 pci_select_bars(pdev, IORESOURCE_IO));
1576 pci_request_mem_regions(struct pci_dev *pdev, const char *name)
1578 return pci_request_selected_regions(pdev,
1579 pci_select_bars(pdev, IORESOURCE_MEM), name);
1583 pci_release_mem_regions(struct pci_dev *pdev)
1585 return pci_release_selected_regions(pdev,
1586 pci_select_bars(pdev, IORESOURCE_MEM));
1589 #else /* CONFIG_PCI is not enabled */
1591 static inline void pci_set_flags(int flags) { }
1592 static inline void pci_add_flags(int flags) { }
1593 static inline void pci_clear_flags(int flags) { }
1594 static inline int pci_has_flag(int flag) { return 0; }
1597 * If the system does not have PCI, clearly these return errors. Define
1598 * these as simple inline functions to avoid hair in drivers.
1601 #define _PCI_NOP(o, s, t) \
1602 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
1604 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
1606 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
1607 _PCI_NOP(o, word, u16 x) \
1608 _PCI_NOP(o, dword, u32 x)
1609 _PCI_NOP_ALL(read, *)
1610 _PCI_NOP_ALL(write,)
1612 static inline struct pci_dev *pci_get_device(unsigned int vendor,
1613 unsigned int device,
1614 struct pci_dev *from)
1617 static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
1618 unsigned int device,
1619 unsigned int ss_vendor,
1620 unsigned int ss_device,
1621 struct pci_dev *from)
1624 static inline struct pci_dev *pci_get_class(unsigned int class,
1625 struct pci_dev *from)
1628 #define pci_dev_present(ids) (0)
1629 #define no_pci_devices() (1)
1630 #define pci_dev_put(dev) do { } while (0)
1632 static inline void pci_set_master(struct pci_dev *dev) { }
1633 static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
1634 static inline void pci_disable_device(struct pci_dev *dev) { }
1635 static inline int pci_assign_resource(struct pci_dev *dev, int i)
1637 static inline int __must_check __pci_register_driver(struct pci_driver *drv,
1638 struct module *owner,
1639 const char *mod_name)
1641 static inline int pci_register_driver(struct pci_driver *drv)
1643 static inline void pci_unregister_driver(struct pci_driver *drv) { }
1644 static inline int pci_find_capability(struct pci_dev *dev, int cap)
1646 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
1649 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
1652 /* Power management related routines */
1653 static inline int pci_save_state(struct pci_dev *dev) { return 0; }
1654 static inline void pci_restore_state(struct pci_dev *dev) { }
1655 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
1657 static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable)
1659 static inline pci_power_t pci_choose_state(struct pci_dev *dev,
1662 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1666 static inline struct resource *pci_find_resource(struct pci_dev *dev,
1667 struct resource *res)
1669 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
1671 static inline void pci_release_regions(struct pci_dev *dev) { }
1673 static inline unsigned long pci_address_to_pio(phys_addr_t addr) { return -1; }
1675 static inline void pci_block_cfg_access(struct pci_dev *dev) { }
1676 static inline int pci_block_cfg_access_in_atomic(struct pci_dev *dev)
1678 static inline void pci_unblock_cfg_access(struct pci_dev *dev) { }
1680 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
1682 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
1685 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
1689 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1690 static inline struct pci_dev *pci_dev_get(struct pci_dev *dev) { return NULL; }
1691 static inline int pci_get_new_domain_nr(void) { return -ENOSYS; }
1693 #define dev_is_pci(d) (false)
1694 #define dev_is_pf(d) (false)
1695 static inline bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags)
1697 static inline int pci_irqd_intx_xlate(struct irq_domain *d,
1698 struct device_node *node,
1700 unsigned int intsize,
1701 unsigned long *out_hwirq,
1702 unsigned int *out_type)
1704 #endif /* CONFIG_PCI */
1706 /* Include architecture-dependent settings and functions */
1708 #include <asm/pci.h>
1710 /* These two functions provide almost identical functionality. Depennding
1711 * on the architecture, one will be implemented as a wrapper around the
1712 * other (in drivers/pci/mmap.c).
1714 * pci_mmap_resource_range() maps a specific BAR, and vm->vm_pgoff
1715 * is expected to be an offset within that region.
1717 * pci_mmap_page_range() is the legacy architecture-specific interface,
1718 * which accepts a "user visible" resource address converted by
1719 * pci_resource_to_user(), as used in the legacy mmap() interface in
1722 int pci_mmap_resource_range(struct pci_dev *dev, int bar,
1723 struct vm_area_struct *vma,
1724 enum pci_mmap_state mmap_state, int write_combine);
1725 int pci_mmap_page_range(struct pci_dev *pdev, int bar,
1726 struct vm_area_struct *vma,
1727 enum pci_mmap_state mmap_state, int write_combine);
1729 #ifndef arch_can_pci_mmap_wc
1730 #define arch_can_pci_mmap_wc() 0
1733 #ifndef arch_can_pci_mmap_io
1734 #define arch_can_pci_mmap_io() 0
1735 #define pci_iobar_pfn(pdev, bar, vma) (-EINVAL)
1737 int pci_iobar_pfn(struct pci_dev *pdev, int bar, struct vm_area_struct *vma);
1740 #ifndef pci_root_bus_fwnode
1741 #define pci_root_bus_fwnode(bus) NULL
1744 /* these helpers provide future and backwards compatibility
1745 * for accessing popular PCI BAR info */
1746 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
1747 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
1748 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
1749 #define pci_resource_len(dev,bar) \
1750 ((pci_resource_start((dev), (bar)) == 0 && \
1751 pci_resource_end((dev), (bar)) == \
1752 pci_resource_start((dev), (bar))) ? 0 : \
1754 (pci_resource_end((dev), (bar)) - \
1755 pci_resource_start((dev), (bar)) + 1))
1757 /* Similar to the helpers above, these manipulate per-pci_dev
1758 * driver-specific data. They are really just a wrapper around
1759 * the generic device structure functions of these calls.
1761 static inline void *pci_get_drvdata(struct pci_dev *pdev)
1763 return dev_get_drvdata(&pdev->dev);
1766 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
1768 dev_set_drvdata(&pdev->dev, data);
1771 /* If you want to know what to call your pci_dev, ask this function.
1772 * Again, it's a wrapper around the generic device.
1774 static inline const char *pci_name(const struct pci_dev *pdev)
1776 return dev_name(&pdev->dev);
1780 /* Some archs don't want to expose struct resource to userland as-is
1781 * in sysfs and /proc
1783 #ifdef HAVE_ARCH_PCI_RESOURCE_TO_USER
1784 void pci_resource_to_user(const struct pci_dev *dev, int bar,
1785 const struct resource *rsrc,
1786 resource_size_t *start, resource_size_t *end);
1788 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
1789 const struct resource *rsrc, resource_size_t *start,
1790 resource_size_t *end)
1792 *start = rsrc->start;
1795 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
1799 * The world is not perfect and supplies us with broken PCI devices.
1800 * For at least a part of these bugs we need a work-around, so both
1801 * generic (drivers/pci/quirks.c) and per-architecture code can define
1802 * fixup hooks to be called for particular buggy devices.
1806 u16 vendor; /* You can use PCI_ANY_ID here of course */
1807 u16 device; /* You can use PCI_ANY_ID here of course */
1808 u32 class; /* You can use PCI_ANY_ID here too */
1809 unsigned int class_shift; /* should be 0, 8, 16 */
1810 void (*hook)(struct pci_dev *dev);
1813 enum pci_fixup_pass {
1814 pci_fixup_early, /* Before probing BARs */
1815 pci_fixup_header, /* After reading configuration header */
1816 pci_fixup_final, /* Final phase of device fixups */
1817 pci_fixup_enable, /* pci_enable_device() time */
1818 pci_fixup_resume, /* pci_device_resume() */
1819 pci_fixup_suspend, /* pci_device_suspend() */
1820 pci_fixup_resume_early, /* pci_device_resume_early() */
1821 pci_fixup_suspend_late, /* pci_device_suspend_late() */
1824 /* Anonymous variables would be nice... */
1825 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \
1826 class_shift, hook) \
1827 static const struct pci_fixup __PASTE(__pci_fixup_##name,__LINE__) __used \
1828 __attribute__((__section__(#section), aligned((sizeof(void *))))) \
1829 = { vendor, device, class, class_shift, hook };
1831 #define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class, \
1832 class_shift, hook) \
1833 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1834 hook, vendor, device, class, class_shift, hook)
1835 #define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class, \
1836 class_shift, hook) \
1837 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1838 hook, vendor, device, class, class_shift, hook)
1839 #define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class, \
1840 class_shift, hook) \
1841 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1842 hook, vendor, device, class, class_shift, hook)
1843 #define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class, \
1844 class_shift, hook) \
1845 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1846 hook, vendor, device, class, class_shift, hook)
1847 #define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class, \
1848 class_shift, hook) \
1849 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1850 resume##hook, vendor, device, class, \
1852 #define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class, \
1853 class_shift, hook) \
1854 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1855 resume_early##hook, vendor, device, \
1856 class, class_shift, hook)
1857 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class, \
1858 class_shift, hook) \
1859 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1860 suspend##hook, vendor, device, class, \
1862 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND_LATE(vendor, device, class, \
1863 class_shift, hook) \
1864 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
1865 suspend_late##hook, vendor, device, \
1866 class, class_shift, hook)
1868 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
1869 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1870 hook, vendor, device, PCI_ANY_ID, 0, hook)
1871 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
1872 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1873 hook, vendor, device, PCI_ANY_ID, 0, hook)
1874 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
1875 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1876 hook, vendor, device, PCI_ANY_ID, 0, hook)
1877 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
1878 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1879 hook, vendor, device, PCI_ANY_ID, 0, hook)
1880 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
1881 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1882 resume##hook, vendor, device, \
1883 PCI_ANY_ID, 0, hook)
1884 #define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
1885 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1886 resume_early##hook, vendor, device, \
1887 PCI_ANY_ID, 0, hook)
1888 #define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
1889 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1890 suspend##hook, vendor, device, \
1891 PCI_ANY_ID, 0, hook)
1892 #define DECLARE_PCI_FIXUP_SUSPEND_LATE(vendor, device, hook) \
1893 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
1894 suspend_late##hook, vendor, device, \
1895 PCI_ANY_ID, 0, hook)
1897 #ifdef CONFIG_PCI_QUIRKS
1898 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
1899 int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags);
1900 int pci_dev_specific_enable_acs(struct pci_dev *dev);
1902 static inline void pci_fixup_device(enum pci_fixup_pass pass,
1903 struct pci_dev *dev) { }
1904 static inline int pci_dev_specific_acs_enabled(struct pci_dev *dev,
1909 static inline int pci_dev_specific_enable_acs(struct pci_dev *dev)
1915 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
1916 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
1917 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
1918 int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name);
1919 int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
1921 void pcim_iounmap_regions(struct pci_dev *pdev, int mask);
1923 extern int pci_pci_problems;
1924 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
1925 #define PCIPCI_TRITON 2
1926 #define PCIPCI_NATOMA 4
1927 #define PCIPCI_VIAETBF 8
1928 #define PCIPCI_VSFX 16
1929 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
1930 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
1932 extern unsigned long pci_cardbus_io_size;
1933 extern unsigned long pci_cardbus_mem_size;
1934 extern u8 pci_dfl_cache_line_size;
1935 extern u8 pci_cache_line_size;
1937 extern unsigned long pci_hotplug_io_size;
1938 extern unsigned long pci_hotplug_mem_size;
1939 extern unsigned long pci_hotplug_bus_size;
1941 /* Architecture-specific versions may override these (weak) */
1942 void pcibios_disable_device(struct pci_dev *dev);
1943 void pcibios_set_master(struct pci_dev *dev);
1944 int pcibios_set_pcie_reset_state(struct pci_dev *dev,
1945 enum pcie_reset_state state);
1946 int pcibios_add_device(struct pci_dev *dev);
1947 void pcibios_release_device(struct pci_dev *dev);
1948 void pcibios_penalize_isa_irq(int irq, int active);
1949 int pcibios_alloc_irq(struct pci_dev *dev);
1950 void pcibios_free_irq(struct pci_dev *dev);
1952 #ifdef CONFIG_HIBERNATE_CALLBACKS
1953 extern struct dev_pm_ops pcibios_pm_ops;
1956 #if defined(CONFIG_PCI_MMCONFIG) || defined(CONFIG_ACPI_MCFG)
1957 void __init pci_mmcfg_early_init(void);
1958 void __init pci_mmcfg_late_init(void);
1960 static inline void pci_mmcfg_early_init(void) { }
1961 static inline void pci_mmcfg_late_init(void) { }
1964 int pci_ext_cfg_avail(void);
1966 void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
1967 void __iomem *pci_ioremap_wc_bar(struct pci_dev *pdev, int bar);
1969 #ifdef CONFIG_PCI_IOV
1970 int pci_iov_virtfn_bus(struct pci_dev *dev, int id);
1971 int pci_iov_virtfn_devfn(struct pci_dev *dev, int id);
1973 int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
1974 void pci_disable_sriov(struct pci_dev *dev);
1975 int pci_iov_add_virtfn(struct pci_dev *dev, int id, int reset);
1976 void pci_iov_remove_virtfn(struct pci_dev *dev, int id, int reset);
1977 int pci_num_vf(struct pci_dev *dev);
1978 int pci_vfs_assigned(struct pci_dev *dev);
1979 int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs);
1980 int pci_sriov_get_totalvfs(struct pci_dev *dev);
1981 resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno);
1983 static inline int pci_iov_virtfn_bus(struct pci_dev *dev, int id)
1987 static inline int pci_iov_virtfn_devfn(struct pci_dev *dev, int id)
1991 static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
1993 static inline int pci_iov_add_virtfn(struct pci_dev *dev, int id, int reset)
1997 static inline void pci_iov_remove_virtfn(struct pci_dev *dev,
1998 int id, int reset) { }
1999 static inline void pci_disable_sriov(struct pci_dev *dev) { }
2000 static inline int pci_num_vf(struct pci_dev *dev) { return 0; }
2001 static inline int pci_vfs_assigned(struct pci_dev *dev)
2003 static inline int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs)
2005 static inline int pci_sriov_get_totalvfs(struct pci_dev *dev)
2007 static inline resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno)
2011 #if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
2012 void pci_hp_create_module_link(struct pci_slot *pci_slot);
2013 void pci_hp_remove_module_link(struct pci_slot *pci_slot);
2017 * pci_pcie_cap - get the saved PCIe capability offset
2020 * PCIe capability offset is calculated at PCI device initialization
2021 * time and saved in the data structure. This function returns saved
2022 * PCIe capability offset. Using this instead of pci_find_capability()
2023 * reduces unnecessary search in the PCI configuration space. If you
2024 * need to calculate PCIe capability offset from raw device for some
2025 * reasons, please use pci_find_capability() instead.
2027 static inline int pci_pcie_cap(struct pci_dev *dev)
2029 return dev->pcie_cap;
2033 * pci_is_pcie - check if the PCI device is PCI Express capable
2036 * Returns: true if the PCI device is PCI Express capable, false otherwise.
2038 static inline bool pci_is_pcie(struct pci_dev *dev)
2040 return pci_pcie_cap(dev);
2044 * pcie_caps_reg - get the PCIe Capabilities Register
2047 static inline u16 pcie_caps_reg(const struct pci_dev *dev)
2049 return dev->pcie_flags_reg;
2053 * pci_pcie_type - get the PCIe device/port type
2056 static inline int pci_pcie_type(const struct pci_dev *dev)
2058 return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4;
2061 static inline struct pci_dev *pcie_find_root_port(struct pci_dev *dev)
2064 if (!pci_is_pcie(dev))
2066 if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT)
2068 if (!dev->bus->self)
2070 dev = dev->bus->self;
2075 void pci_request_acs(void);
2076 bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags);
2077 bool pci_acs_path_enabled(struct pci_dev *start,
2078 struct pci_dev *end, u16 acs_flags);
2080 #define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */
2081 #define PCI_VPD_LRDT_ID(x) ((x) | PCI_VPD_LRDT)
2083 /* Large Resource Data Type Tag Item Names */
2084 #define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */
2085 #define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */
2086 #define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */
2088 #define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING)
2089 #define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA)
2090 #define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA)
2092 /* Small Resource Data Type Tag Item Names */
2093 #define PCI_VPD_STIN_END 0x0f /* End */
2095 #define PCI_VPD_SRDT_END (PCI_VPD_STIN_END << 3)
2097 #define PCI_VPD_SRDT_TIN_MASK 0x78
2098 #define PCI_VPD_SRDT_LEN_MASK 0x07
2099 #define PCI_VPD_LRDT_TIN_MASK 0x7f
2101 #define PCI_VPD_LRDT_TAG_SIZE 3
2102 #define PCI_VPD_SRDT_TAG_SIZE 1
2104 #define PCI_VPD_INFO_FLD_HDR_SIZE 3
2106 #define PCI_VPD_RO_KEYWORD_PARTNO "PN"
2107 #define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
2108 #define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
2109 #define PCI_VPD_RO_KEYWORD_CHKSUM "RV"
2112 * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length
2113 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
2115 * Returns the extracted Large Resource Data Type length.
2117 static inline u16 pci_vpd_lrdt_size(const u8 *lrdt)
2119 return (u16)lrdt[1] + ((u16)lrdt[2] << 8);
2123 * pci_vpd_lrdt_tag - Extracts the Large Resource Data Type Tag Item
2124 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
2126 * Returns the extracted Large Resource Data Type Tag item.
2128 static inline u16 pci_vpd_lrdt_tag(const u8 *lrdt)
2130 return (u16)(lrdt[0] & PCI_VPD_LRDT_TIN_MASK);
2134 * pci_vpd_srdt_size - Extracts the Small Resource Data Type length
2135 * @srdt: Pointer to the beginning of the Small Resource Data Type tag
2137 * Returns the extracted Small Resource Data Type length.
2139 static inline u8 pci_vpd_srdt_size(const u8 *srdt)
2141 return (*srdt) & PCI_VPD_SRDT_LEN_MASK;
2145 * pci_vpd_srdt_tag - Extracts the Small Resource Data Type Tag Item
2146 * @srdt: Pointer to the beginning of the Small Resource Data Type tag
2148 * Returns the extracted Small Resource Data Type Tag Item.
2150 static inline u8 pci_vpd_srdt_tag(const u8 *srdt)
2152 return ((*srdt) & PCI_VPD_SRDT_TIN_MASK) >> 3;
2156 * pci_vpd_info_field_size - Extracts the information field length
2157 * @lrdt: Pointer to the beginning of an information field header
2159 * Returns the extracted information field length.
2161 static inline u8 pci_vpd_info_field_size(const u8 *info_field)
2163 return info_field[2];
2167 * pci_vpd_find_tag - Locates the Resource Data Type tag provided
2168 * @buf: Pointer to buffered vpd data
2169 * @off: The offset into the buffer at which to begin the search
2170 * @len: The length of the vpd buffer
2171 * @rdt: The Resource Data Type to search for
2173 * Returns the index where the Resource Data Type was found or
2174 * -ENOENT otherwise.
2176 int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt);
2179 * pci_vpd_find_info_keyword - Locates an information field keyword in the VPD
2180 * @buf: Pointer to buffered vpd data
2181 * @off: The offset into the buffer at which to begin the search
2182 * @len: The length of the buffer area, relative to off, in which to search
2183 * @kw: The keyword to search for
2185 * Returns the index where the information field keyword was found or
2186 * -ENOENT otherwise.
2188 int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
2189 unsigned int len, const char *kw);
2191 /* PCI <-> OF binding helpers */
2195 void pci_set_of_node(struct pci_dev *dev);
2196 void pci_release_of_node(struct pci_dev *dev);
2197 void pci_set_bus_of_node(struct pci_bus *bus);
2198 void pci_release_bus_of_node(struct pci_bus *bus);
2199 struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus);
2201 /* Arch may override this (weak) */
2202 struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus);
2204 static inline struct device_node *
2205 pci_device_to_OF_node(const struct pci_dev *pdev)
2207 return pdev ? pdev->dev.of_node : NULL;
2210 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
2212 return bus ? bus->dev.of_node : NULL;
2215 #else /* CONFIG_OF */
2216 static inline void pci_set_of_node(struct pci_dev *dev) { }
2217 static inline void pci_release_of_node(struct pci_dev *dev) { }
2218 static inline void pci_set_bus_of_node(struct pci_bus *bus) { }
2219 static inline void pci_release_bus_of_node(struct pci_bus *bus) { }
2220 static inline struct device_node *
2221 pci_device_to_OF_node(const struct pci_dev *pdev) { return NULL; }
2222 static inline struct irq_domain *
2223 pci_host_bridge_of_msi_domain(struct pci_bus *bus) { return NULL; }
2224 #endif /* CONFIG_OF */
2227 struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus);
2230 pci_msi_register_fwnode_provider(struct fwnode_handle *(*fn)(struct device *));
2232 static inline struct irq_domain *
2233 pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) { return NULL; }
2237 static inline struct eeh_dev *pci_dev_to_eeh_dev(struct pci_dev *pdev)
2239 return pdev->dev.archdata.edev;
2243 void pci_add_dma_alias(struct pci_dev *dev, u8 devfn);
2244 bool pci_devs_are_dma_aliases(struct pci_dev *dev1, struct pci_dev *dev2);
2245 int pci_for_each_dma_alias(struct pci_dev *pdev,
2246 int (*fn)(struct pci_dev *pdev,
2247 u16 alias, void *data), void *data);
2249 /* helper functions for operation of device flag */
2250 static inline void pci_set_dev_assigned(struct pci_dev *pdev)
2252 pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED;
2254 static inline void pci_clear_dev_assigned(struct pci_dev *pdev)
2256 pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
2258 static inline bool pci_is_dev_assigned(struct pci_dev *pdev)
2260 return (pdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED) == PCI_DEV_FLAGS_ASSIGNED;
2264 * pci_ari_enabled - query ARI forwarding status
2267 * Returns true if ARI forwarding is enabled.
2269 static inline bool pci_ari_enabled(struct pci_bus *bus)
2271 return bus->self && bus->self->ari_enabled;
2275 * pci_is_thunderbolt_attached - whether device is on a Thunderbolt daisy chain
2276 * @pdev: PCI device to check
2278 * Walk upwards from @pdev and check for each encountered bridge if it's part
2279 * of a Thunderbolt controller. Reaching the host bridge means @pdev is not
2280 * Thunderbolt-attached. (But rather soldered to the mainboard usually.)
2282 static inline bool pci_is_thunderbolt_attached(struct pci_dev *pdev)
2284 struct pci_dev *parent = pdev;
2286 if (pdev->is_thunderbolt)
2289 while ((parent = pci_upstream_bridge(parent)))
2290 if (parent->is_thunderbolt)
2296 /* provide the legacy pci_dma_* API */
2297 #include <linux/pci-dma-compat.h>
2299 #define pci_printk(level, pdev, fmt, arg...) \
2300 dev_printk(level, &(pdev)->dev, fmt, ##arg)
2302 #define pci_emerg(pdev, fmt, arg...) dev_emerg(&(pdev)->dev, fmt, ##arg)
2303 #define pci_alert(pdev, fmt, arg...) dev_alert(&(pdev)->dev, fmt, ##arg)
2304 #define pci_crit(pdev, fmt, arg...) dev_crit(&(pdev)->dev, fmt, ##arg)
2305 #define pci_err(pdev, fmt, arg...) dev_err(&(pdev)->dev, fmt, ##arg)
2306 #define pci_warn(pdev, fmt, arg...) dev_warn(&(pdev)->dev, fmt, ##arg)
2307 #define pci_notice(pdev, fmt, arg...) dev_notice(&(pdev)->dev, fmt, ##arg)
2308 #define pci_info(pdev, fmt, arg...) dev_info(&(pdev)->dev, fmt, ##arg)
2309 #define pci_dbg(pdev, fmt, arg...) dev_dbg(&(pdev)->dev, fmt, ##arg)
2311 #endif /* LINUX_PCI_H */