4 * PCI defines and function prototypes
5 * Copyright 1994, Drew Eckhardt
6 * Copyright 1997--1999 Martin Mares <mj@ucw.cz>
8 * For more information, please consult the following manuals (look at
9 * http://www.pcisig.com/ for how to get them):
11 * PCI BIOS Specification
12 * PCI Local Bus Specification
13 * PCI to PCI Bridge Specification
14 * PCI System Design Guide
20 #include <linux/mod_devicetable.h>
22 #include <linux/types.h>
23 #include <linux/init.h>
24 #include <linux/ioport.h>
25 #include <linux/list.h>
26 #include <linux/compiler.h>
27 #include <linux/errno.h>
28 #include <linux/kobject.h>
29 #include <linux/atomic.h>
30 #include <linux/device.h>
31 #include <linux/interrupt.h>
33 #include <linux/resource_ext.h>
34 #include <uapi/linux/pci.h>
36 #include <linux/pci_ids.h>
39 * The PCI interface treats multi-function devices as independent
40 * devices. The slot/function address of each device is encoded
41 * in a single byte as follows:
46 * PCI_DEVFN(), PCI_SLOT(), and PCI_FUNC() are defined in uapi/linux/pci.h.
47 * In the interest of not exposing interfaces to user-space unnecessarily,
48 * the following kernel-only defines are being added here.
50 #define PCI_DEVID(bus, devfn) ((((u16)(bus)) << 8) | (devfn))
51 /* return bus from PCI devid = ((u16)bus_number) << 8) | devfn */
52 #define PCI_BUS_NUM(x) (((x) >> 8) & 0xff)
54 /* pci_slot represents a physical slot */
56 struct pci_bus *bus; /* The bus this slot is on */
57 struct list_head list; /* node in list of slots on this bus */
58 struct hotplug_slot *hotplug; /* Hotplug info (migrate over time) */
59 unsigned char number; /* PCI_SLOT(pci_dev->devfn) */
63 static inline const char *pci_slot_name(const struct pci_slot *slot)
65 return kobject_name(&slot->kobj);
68 /* File state for mmap()s on /proc/bus/pci/X/Y */
75 * For PCI devices, the region numbers are assigned this way:
78 /* #0-5: standard PCI resources */
80 PCI_STD_RESOURCE_END = 5,
82 /* #6: expansion ROM resource */
85 /* device specific resources */
88 PCI_IOV_RESOURCE_END = PCI_IOV_RESOURCES + PCI_SRIOV_NUM_BARS - 1,
91 /* resources assigned to buses behind the bridge */
92 #define PCI_BRIDGE_RESOURCE_NUM 4
95 PCI_BRIDGE_RESOURCE_END = PCI_BRIDGE_RESOURCES +
96 PCI_BRIDGE_RESOURCE_NUM - 1,
98 /* total resources associated with a PCI device */
101 /* preserve this for compatibility */
102 DEVICE_COUNT_RESOURCE = PCI_NUM_RESOURCES,
106 * pci_power_t values must match the bits in the Capabilities PME_Support
107 * and Control/Status PowerState fields in the Power Management capability.
109 typedef int __bitwise pci_power_t;
111 #define PCI_D0 ((pci_power_t __force) 0)
112 #define PCI_D1 ((pci_power_t __force) 1)
113 #define PCI_D2 ((pci_power_t __force) 2)
114 #define PCI_D3hot ((pci_power_t __force) 3)
115 #define PCI_D3cold ((pci_power_t __force) 4)
116 #define PCI_UNKNOWN ((pci_power_t __force) 5)
117 #define PCI_POWER_ERROR ((pci_power_t __force) -1)
119 /* Remember to update this when the list above changes! */
120 extern const char *pci_power_names[];
122 static inline const char *pci_power_name(pci_power_t state)
124 return pci_power_names[1 + (__force int) state];
127 #define PCI_PM_D2_DELAY 200
128 #define PCI_PM_D3_WAIT 10
129 #define PCI_PM_D3COLD_WAIT 100
130 #define PCI_PM_BUS_WAIT 50
132 /** The pci_channel state describes connectivity between the CPU and
133 * the pci device. If some PCI bus between here and the pci device
134 * has crashed or locked up, this info is reflected here.
136 typedef unsigned int __bitwise pci_channel_state_t;
138 enum pci_channel_state {
139 /* I/O channel is in normal state */
140 pci_channel_io_normal = (__force pci_channel_state_t) 1,
142 /* I/O to channel is blocked */
143 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
145 /* PCI card is dead */
146 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
149 typedef unsigned int __bitwise pcie_reset_state_t;
151 enum pcie_reset_state {
152 /* Reset is NOT asserted (Use to deassert reset) */
153 pcie_deassert_reset = (__force pcie_reset_state_t) 1,
155 /* Use #PERST to reset PCIe device */
156 pcie_warm_reset = (__force pcie_reset_state_t) 2,
158 /* Use PCIe Hot Reset to reset device */
159 pcie_hot_reset = (__force pcie_reset_state_t) 3
162 typedef unsigned short __bitwise pci_dev_flags_t;
164 /* INTX_DISABLE in PCI_COMMAND register disables MSI
167 PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) (1 << 0),
168 /* Device configuration is irrevocably lost if disabled into D3 */
169 PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) (1 << 1),
170 /* Provide indication device is assigned by a Virtual Machine Manager */
171 PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) (1 << 2),
172 /* Flag for quirk use to store if quirk-specific ACS is enabled */
173 PCI_DEV_FLAGS_ACS_ENABLED_QUIRK = (__force pci_dev_flags_t) (1 << 3),
174 /* Use a PCIe-to-PCI bridge alias even if !pci_is_pcie */
175 PCI_DEV_FLAG_PCIE_BRIDGE_ALIAS = (__force pci_dev_flags_t) (1 << 5),
176 /* Do not use bus resets for device */
177 PCI_DEV_FLAGS_NO_BUS_RESET = (__force pci_dev_flags_t) (1 << 6),
178 /* Do not use PM reset even if device advertises NoSoftRst- */
179 PCI_DEV_FLAGS_NO_PM_RESET = (__force pci_dev_flags_t) (1 << 7),
180 /* Get VPD from function 0 VPD */
181 PCI_DEV_FLAGS_VPD_REF_F0 = (__force pci_dev_flags_t) (1 << 8),
182 /* a non-root bridge where translation occurs, stop alias search here */
183 PCI_DEV_FLAGS_BRIDGE_XLATE_ROOT = (__force pci_dev_flags_t) (1 << 9),
184 /* Do not use FLR even if device advertises PCI_AF_CAP */
185 PCI_DEV_FLAGS_NO_FLR_RESET = (__force pci_dev_flags_t) (1 << 10),
188 enum pci_irq_reroute_variant {
189 INTEL_IRQ_REROUTE_VARIANT = 1,
190 MAX_IRQ_REROUTE_VARIANTS = 3
193 typedef unsigned short __bitwise pci_bus_flags_t;
195 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
196 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
197 PCI_BUS_FLAGS_NO_AERSID = (__force pci_bus_flags_t) 4,
200 /* These values come from the PCI Express Spec */
201 enum pcie_link_width {
202 PCIE_LNK_WIDTH_RESRV = 0x00,
210 PCIE_LNK_WIDTH_UNKNOWN = 0xFF,
213 /* Based on the PCI Hotplug Spec, but some values are made up by us */
215 PCI_SPEED_33MHz = 0x00,
216 PCI_SPEED_66MHz = 0x01,
217 PCI_SPEED_66MHz_PCIX = 0x02,
218 PCI_SPEED_100MHz_PCIX = 0x03,
219 PCI_SPEED_133MHz_PCIX = 0x04,
220 PCI_SPEED_66MHz_PCIX_ECC = 0x05,
221 PCI_SPEED_100MHz_PCIX_ECC = 0x06,
222 PCI_SPEED_133MHz_PCIX_ECC = 0x07,
223 PCI_SPEED_66MHz_PCIX_266 = 0x09,
224 PCI_SPEED_100MHz_PCIX_266 = 0x0a,
225 PCI_SPEED_133MHz_PCIX_266 = 0x0b,
231 PCI_SPEED_66MHz_PCIX_533 = 0x11,
232 PCI_SPEED_100MHz_PCIX_533 = 0x12,
233 PCI_SPEED_133MHz_PCIX_533 = 0x13,
234 PCIE_SPEED_2_5GT = 0x14,
235 PCIE_SPEED_5_0GT = 0x15,
236 PCIE_SPEED_8_0GT = 0x16,
237 PCI_SPEED_UNKNOWN = 0xff,
240 struct pci_cap_saved_data {
247 struct pci_cap_saved_state {
248 struct hlist_node next;
249 struct pci_cap_saved_data cap;
253 struct pcie_link_state;
259 * The pci_dev structure is used to describe PCI devices.
262 struct list_head bus_list; /* node in per-bus list */
263 struct pci_bus *bus; /* bus this device is on */
264 struct pci_bus *subordinate; /* bus this device bridges to */
266 void *sysdata; /* hook for sys-specific extension */
267 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
268 struct pci_slot *slot; /* Physical slot this device is in */
270 unsigned int devfn; /* encoded device & function index */
271 unsigned short vendor;
272 unsigned short device;
273 unsigned short subsystem_vendor;
274 unsigned short subsystem_device;
275 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
276 u8 revision; /* PCI revision, low byte of class word */
277 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
278 #ifdef CONFIG_PCIEAER
279 u16 aer_cap; /* AER capability offset */
281 u8 pcie_cap; /* PCIe capability offset */
282 u8 msi_cap; /* MSI capability offset */
283 u8 msix_cap; /* MSI-X capability offset */
284 u8 pcie_mpss:3; /* PCIe Max Payload Size Supported */
285 u8 rom_base_reg; /* which config register controls the ROM */
286 u8 pin; /* which interrupt pin this device uses */
287 u16 pcie_flags_reg; /* cached PCIe Capabilities Register */
288 unsigned long *dma_alias_mask;/* mask of enabled devfn aliases */
290 struct pci_driver *driver; /* which driver has allocated this device */
291 u64 dma_mask; /* Mask of the bits of bus address this
292 device implements. Normally this is
293 0xffffffff. You only need to change
294 this if your device has broken DMA
295 or supports 64-bit transfers. */
297 struct device_dma_parameters dma_parms;
299 pci_power_t current_state; /* Current operating state. In ACPI-speak,
300 this is D0-D3, D0 being fully functional,
302 u8 pm_cap; /* PM capability offset */
303 unsigned int pme_support:5; /* Bitmask of states from which PME#
305 unsigned int pme_interrupt:1;
306 unsigned int pme_poll:1; /* Poll device's PME status bit */
307 unsigned int d1_support:1; /* Low power state D1 is supported */
308 unsigned int d2_support:1; /* Low power state D2 is supported */
309 unsigned int no_d1d2:1; /* D1 and D2 are forbidden */
310 unsigned int no_d3cold:1; /* D3cold is forbidden */
311 unsigned int bridge_d3:1; /* Allow D3 for bridge */
312 unsigned int d3cold_allowed:1; /* D3cold is allowed by user */
313 unsigned int mmio_always_on:1; /* disallow turning off io/mem
314 decoding during bar sizing */
315 unsigned int wakeup_prepared:1;
316 unsigned int runtime_d3cold:1; /* whether go through runtime
317 D3cold, not set for devices
318 powered on/off by the
319 corresponding bridge */
320 unsigned int ignore_hotplug:1; /* Ignore hotplug events */
321 unsigned int hotplug_user_indicators:1; /* SlotCtl indicators
322 controlled exclusively by
324 unsigned int d3_delay; /* D3->D0 transition time in ms */
325 unsigned int d3cold_delay; /* D3cold->D0 transition time in ms */
327 #ifdef CONFIG_PCIEASPM
328 struct pcie_link_state *link_state; /* ASPM link state */
331 pci_channel_state_t error_state; /* current connectivity state */
332 struct device dev; /* Generic device interface */
334 int cfg_size; /* Size of configuration space */
337 * Instead of touching interrupt line and base address registers
338 * directly, use the values stored here. They might be different!
341 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
343 bool match_driver; /* Skip attaching driver */
344 /* These fields are used by common fixups */
345 unsigned int transparent:1; /* Subtractive decode PCI bridge */
346 unsigned int multifunction:1;/* Part of multi-function device */
347 /* keep track of device state */
348 unsigned int is_added:1;
349 unsigned int is_busmaster:1; /* device is busmaster */
350 unsigned int no_msi:1; /* device may not use msi */
351 unsigned int no_64bit_msi:1; /* device may only use 32-bit MSIs */
352 unsigned int block_cfg_access:1; /* config space access is blocked */
353 unsigned int broken_parity_status:1; /* Device generates false positive parity */
354 unsigned int irq_reroute_variant:2; /* device needs IRQ rerouting variant */
355 unsigned int msi_enabled:1;
356 unsigned int msix_enabled:1;
357 unsigned int ari_enabled:1; /* ARI forwarding */
358 unsigned int ats_enabled:1; /* Address Translation Service */
359 unsigned int is_managed:1;
360 unsigned int needs_freset:1; /* Dev requires fundamental reset */
361 unsigned int state_saved:1;
362 unsigned int is_physfn:1;
363 unsigned int is_virtfn:1;
364 unsigned int reset_fn:1;
365 unsigned int is_hotplug_bridge:1;
366 unsigned int is_thunderbolt:1; /* Thunderbolt controller */
367 unsigned int __aer_firmware_first_valid:1;
368 unsigned int __aer_firmware_first:1;
369 unsigned int broken_intx_masking:1;
370 unsigned int io_window_1k:1; /* Intel P2P bridge 1K I/O windows */
371 unsigned int irq_managed:1;
372 unsigned int has_secondary_link:1;
373 unsigned int non_compliant_bars:1; /* broken BARs; ignore them */
374 pci_dev_flags_t dev_flags;
375 atomic_t enable_cnt; /* pci_enable_device has been called */
377 u32 saved_config_space[16]; /* config space saved at suspend time */
378 struct hlist_head saved_cap_space;
379 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
380 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
381 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
382 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
384 #ifdef CONFIG_PCIE_PTM
385 unsigned int ptm_root:1;
386 unsigned int ptm_enabled:1;
389 #ifdef CONFIG_PCI_MSI
390 const struct attribute_group **msi_irq_groups;
393 #ifdef CONFIG_PCI_ATS
395 struct pci_sriov *sriov; /* SR-IOV capability related */
396 struct pci_dev *physfn; /* the PF this VF is associated with */
398 u16 ats_cap; /* ATS Capability offset */
399 u8 ats_stu; /* ATS Smallest Translation Unit */
400 atomic_t ats_ref_cnt; /* number of VFs with ATS enabled */
402 phys_addr_t rom; /* Physical address of ROM if it's not from the BAR */
403 size_t romlen; /* Length of ROM if it's not from the BAR */
404 char *driver_override; /* Driver name to force a match */
406 unsigned long priv_flags; /* Private flags for the pci driver */
409 static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
411 #ifdef CONFIG_PCI_IOV
418 struct pci_dev *pci_alloc_dev(struct pci_bus *bus);
420 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
421 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
423 static inline int pci_channel_offline(struct pci_dev *pdev)
425 return (pdev->error_state != pci_channel_io_normal);
428 struct pci_host_bridge {
430 struct pci_bus *bus; /* root bus */
434 struct list_head windows; /* resource_entry */
435 void (*release_fn)(struct pci_host_bridge *);
437 struct msi_controller *msi;
438 unsigned int ignore_reset_delay:1; /* for entire hierarchy */
439 /* Resource alignment requirements */
440 resource_size_t (*align_resource)(struct pci_dev *dev,
441 const struct resource *res,
442 resource_size_t start,
443 resource_size_t size,
444 resource_size_t align);
445 unsigned long private[0] ____cacheline_aligned;
448 #define to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev)
450 static inline void *pci_host_bridge_priv(struct pci_host_bridge *bridge)
452 return (void *)bridge->private;
455 static inline struct pci_host_bridge *pci_host_bridge_from_priv(void *priv)
457 return container_of(priv, struct pci_host_bridge, private);
460 struct pci_host_bridge *pci_alloc_host_bridge(size_t priv);
461 struct pci_host_bridge *devm_pci_alloc_host_bridge(struct device *dev,
463 void pci_free_host_bridge(struct pci_host_bridge *bridge);
464 int pci_register_host_bridge(struct pci_host_bridge *bridge);
465 struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus);
467 void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
468 void (*release_fn)(struct pci_host_bridge *),
471 int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge);
474 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
475 * to P2P or CardBus bridge windows) go in a table. Additional ones (for
476 * buses below host bridges or subtractive decode bridges) go in the list.
477 * Use pci_bus_for_each_resource() to iterate through all the resources.
481 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly
482 * and there's no way to program the bridge with the details of the window.
483 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive-
484 * decode bit set, because they are explicit and can be programmed with _SRS.
486 #define PCI_SUBTRACTIVE_DECODE 0x1
488 struct pci_bus_resource {
489 struct list_head list;
490 struct resource *res;
494 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
497 struct list_head node; /* node in list of buses */
498 struct pci_bus *parent; /* parent bus this bridge is on */
499 struct list_head children; /* list of child buses */
500 struct list_head devices; /* list of devices on this bus */
501 struct pci_dev *self; /* bridge device as seen by parent */
502 struct list_head slots; /* list of slots on this bus;
503 protected by pci_slot_mutex */
504 struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
505 struct list_head resources; /* address space routed to this bus */
506 struct resource busn_res; /* bus numbers routed to this bus */
508 struct pci_ops *ops; /* configuration access functions */
509 struct msi_controller *msi; /* MSI controller */
510 void *sysdata; /* hook for sys-specific extension */
511 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
513 unsigned char number; /* bus number */
514 unsigned char primary; /* number of primary bridge */
515 unsigned char max_bus_speed; /* enum pci_bus_speed */
516 unsigned char cur_bus_speed; /* enum pci_bus_speed */
517 #ifdef CONFIG_PCI_DOMAINS_GENERIC
523 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
524 pci_bus_flags_t bus_flags; /* inherited by child buses */
525 struct device *bridge;
527 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
528 struct bin_attribute *legacy_mem; /* legacy mem */
529 unsigned int is_added:1;
532 #define to_pci_bus(n) container_of(n, struct pci_bus, dev)
535 * Returns true if the PCI bus is root (behind host-PCI bridge),
538 * Some code assumes that "bus->self == NULL" means that bus is a root bus.
539 * This is incorrect because "virtual" buses added for SR-IOV (via
540 * virtfn_add_bus()) have "bus->self == NULL" but are not root buses.
542 static inline bool pci_is_root_bus(struct pci_bus *pbus)
544 return !(pbus->parent);
548 * pci_is_bridge - check if the PCI device is a bridge
551 * Return true if the PCI device is bridge whether it has subordinate
554 static inline bool pci_is_bridge(struct pci_dev *dev)
556 return dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
557 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS;
560 static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev)
562 dev = pci_physfn(dev);
563 if (pci_is_root_bus(dev->bus))
566 return dev->bus->self;
569 struct device *pci_get_host_bridge_device(struct pci_dev *dev);
570 void pci_put_host_bridge_device(struct device *dev);
572 #ifdef CONFIG_PCI_MSI
573 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
575 return pci_dev->msi_enabled || pci_dev->msix_enabled;
578 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
582 * Error values that may be returned by PCI functions.
584 #define PCIBIOS_SUCCESSFUL 0x00
585 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
586 #define PCIBIOS_BAD_VENDOR_ID 0x83
587 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
588 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
589 #define PCIBIOS_SET_FAILED 0x88
590 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
593 * Translate above to generic errno for passing back through non-PCI code.
595 static inline int pcibios_err_to_errno(int err)
597 if (err <= PCIBIOS_SUCCESSFUL)
598 return err; /* Assume already errno */
601 case PCIBIOS_FUNC_NOT_SUPPORTED:
603 case PCIBIOS_BAD_VENDOR_ID:
605 case PCIBIOS_DEVICE_NOT_FOUND:
607 case PCIBIOS_BAD_REGISTER_NUMBER:
609 case PCIBIOS_SET_FAILED:
611 case PCIBIOS_BUFFER_TOO_SMALL:
618 /* Low-level architecture-dependent routines */
621 int (*add_bus)(struct pci_bus *bus);
622 void (*remove_bus)(struct pci_bus *bus);
623 void __iomem *(*map_bus)(struct pci_bus *bus, unsigned int devfn, int where);
624 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
625 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
629 * ACPI needs to be able to access PCI config space before we've done a
630 * PCI bus scan and created pci_bus structures.
632 int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
633 int reg, int len, u32 *val);
634 int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
635 int reg, int len, u32 val);
637 #ifdef CONFIG_PCI_BUS_ADDR_T_64BIT
638 typedef u64 pci_bus_addr_t;
640 typedef u32 pci_bus_addr_t;
643 struct pci_bus_region {
644 pci_bus_addr_t start;
649 spinlock_t lock; /* protects list, index */
650 struct list_head list; /* for IDs added at runtime */
655 * PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
656 * a set of callbacks in struct pci_error_handlers, that device driver
657 * will be notified of PCI bus errors, and will be driven to recovery
658 * when an error occurs.
661 typedef unsigned int __bitwise pci_ers_result_t;
663 enum pci_ers_result {
664 /* no result/none/not supported in device driver */
665 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
667 /* Device driver can recover without slot reset */
668 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
670 /* Device driver wants slot to be reset. */
671 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
673 /* Device has completely failed, is unrecoverable */
674 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
676 /* Device driver is fully recovered and operational */
677 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
679 /* No AER capabilities registered for the driver */
680 PCI_ERS_RESULT_NO_AER_DRIVER = (__force pci_ers_result_t) 6,
683 /* PCI bus error event callbacks */
684 struct pci_error_handlers {
685 /* PCI bus error detected on this device */
686 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
687 enum pci_channel_state error);
689 /* MMIO has been re-enabled, but not DMA */
690 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
692 /* PCI slot has been reset */
693 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
695 /* PCI function reset prepare or completed */
696 void (*reset_notify)(struct pci_dev *dev, bool prepare);
698 /* Device driver may resume normal operations */
699 void (*resume)(struct pci_dev *dev);
705 struct list_head node;
707 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
708 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
709 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
710 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
711 int (*suspend_late) (struct pci_dev *dev, pm_message_t state);
712 int (*resume_early) (struct pci_dev *dev);
713 int (*resume) (struct pci_dev *dev); /* Device woken up */
714 void (*shutdown) (struct pci_dev *dev);
715 int (*sriov_configure) (struct pci_dev *dev, int num_vfs); /* PF pdev */
716 const struct pci_error_handlers *err_handler;
717 struct device_driver driver;
718 struct pci_dynids dynids;
721 #define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
724 * PCI_DEVICE - macro used to describe a specific pci device
725 * @vend: the 16 bit PCI Vendor ID
726 * @dev: the 16 bit PCI Device ID
728 * This macro is used to create a struct pci_device_id that matches a
729 * specific device. The subvendor and subdevice fields will be set to
732 #define PCI_DEVICE(vend,dev) \
733 .vendor = (vend), .device = (dev), \
734 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
737 * PCI_DEVICE_SUB - macro used to describe a specific pci device with subsystem
738 * @vend: the 16 bit PCI Vendor ID
739 * @dev: the 16 bit PCI Device ID
740 * @subvend: the 16 bit PCI Subvendor ID
741 * @subdev: the 16 bit PCI Subdevice ID
743 * This macro is used to create a struct pci_device_id that matches a
744 * specific device with subsystem information.
746 #define PCI_DEVICE_SUB(vend, dev, subvend, subdev) \
747 .vendor = (vend), .device = (dev), \
748 .subvendor = (subvend), .subdevice = (subdev)
751 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
752 * @dev_class: the class, subclass, prog-if triple for this device
753 * @dev_class_mask: the class mask for this device
755 * This macro is used to create a struct pci_device_id that matches a
756 * specific PCI class. The vendor, device, subvendor, and subdevice
757 * fields will be set to PCI_ANY_ID.
759 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
760 .class = (dev_class), .class_mask = (dev_class_mask), \
761 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
762 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
765 * PCI_VDEVICE - macro used to describe a specific pci device in short form
766 * @vend: the vendor name
767 * @dev: the 16 bit PCI Device ID
769 * This macro is used to create a struct pci_device_id that matches a
770 * specific PCI device. The subvendor, and subdevice fields will be set
771 * to PCI_ANY_ID. The macro allows the next field to follow as the device
775 #define PCI_VDEVICE(vend, dev) \
776 .vendor = PCI_VENDOR_ID_##vend, .device = (dev), \
777 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0
780 PCI_REASSIGN_ALL_RSRC = 0x00000001, /* ignore firmware setup */
781 PCI_REASSIGN_ALL_BUS = 0x00000002, /* reassign all bus numbers */
782 PCI_PROBE_ONLY = 0x00000004, /* use existing setup */
783 PCI_CAN_SKIP_ISA_ALIGN = 0x00000008, /* don't do ISA alignment */
784 PCI_ENABLE_PROC_DOMAINS = 0x00000010, /* enable domains in /proc */
785 PCI_COMPAT_DOMAIN_0 = 0x00000020, /* ... except domain 0 */
786 PCI_SCAN_ALL_PCIE_DEVS = 0x00000040, /* scan all, not just dev 0 */
789 /* these external functions are only available when PCI support is enabled */
792 extern unsigned int pci_flags;
794 static inline void pci_set_flags(int flags) { pci_flags = flags; }
795 static inline void pci_add_flags(int flags) { pci_flags |= flags; }
796 static inline void pci_clear_flags(int flags) { pci_flags &= ~flags; }
797 static inline int pci_has_flag(int flag) { return pci_flags & flag; }
799 void pcie_bus_configure_settings(struct pci_bus *bus);
801 enum pcie_bus_config_types {
802 PCIE_BUS_TUNE_OFF, /* don't touch MPS at all */
803 PCIE_BUS_DEFAULT, /* ensure MPS matches upstream bridge */
804 PCIE_BUS_SAFE, /* use largest MPS boot-time devices support */
805 PCIE_BUS_PERFORMANCE, /* use MPS and MRRS for best performance */
806 PCIE_BUS_PEER2PEER, /* set MPS = 128 for all devices */
809 extern enum pcie_bus_config_types pcie_bus_config;
811 extern struct bus_type pci_bus_type;
813 /* Do NOT directly access these two variables, unless you are arch-specific PCI
814 * code, or PCI core code. */
815 extern struct list_head pci_root_buses; /* list of all known PCI buses */
816 /* Some device drivers need know if PCI is initiated */
817 int no_pci_devices(void);
819 void pcibios_resource_survey_bus(struct pci_bus *bus);
820 void pcibios_bus_add_device(struct pci_dev *pdev);
821 void pcibios_add_bus(struct pci_bus *bus);
822 void pcibios_remove_bus(struct pci_bus *bus);
823 void pcibios_fixup_bus(struct pci_bus *);
824 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
825 /* Architecture-specific versions may override this (weak) */
826 char *pcibios_setup(char *str);
828 /* Used only when drivers/pci/setup.c is used */
829 resource_size_t pcibios_align_resource(void *, const struct resource *,
832 void pcibios_update_irq(struct pci_dev *, int irq);
834 /* Weak but can be overriden by arch */
835 void pci_fixup_cardbus(struct pci_bus *);
837 /* Generic PCI functions used internally */
839 void pcibios_resource_to_bus(struct pci_bus *bus, struct pci_bus_region *region,
840 struct resource *res);
841 void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
842 struct pci_bus_region *region);
843 void pcibios_scan_specific_bus(int busn);
844 struct pci_bus *pci_find_bus(int domain, int busnr);
845 void pci_bus_add_devices(const struct pci_bus *bus);
846 struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
847 struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
848 struct pci_ops *ops, void *sysdata,
849 struct list_head *resources);
850 int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
851 int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax);
852 void pci_bus_release_busn_res(struct pci_bus *b);
853 struct pci_bus *pci_scan_root_bus_msi(struct device *parent, int bus,
854 struct pci_ops *ops, void *sysdata,
855 struct list_head *resources,
856 struct msi_controller *msi);
857 struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
858 struct pci_ops *ops, void *sysdata,
859 struct list_head *resources);
860 int pci_scan_root_bus_bridge(struct pci_host_bridge *bridge);
861 struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
863 void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
864 struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
866 struct hotplug_slot *hotplug);
867 void pci_destroy_slot(struct pci_slot *slot);
869 void pci_dev_assign_slot(struct pci_dev *dev);
871 static inline void pci_dev_assign_slot(struct pci_dev *dev) { }
873 int pci_scan_slot(struct pci_bus *bus, int devfn);
874 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
875 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
876 unsigned int pci_scan_child_bus(struct pci_bus *bus);
877 void pci_bus_add_device(struct pci_dev *dev);
878 void pci_read_bridge_bases(struct pci_bus *child);
879 struct resource *pci_find_parent_resource(const struct pci_dev *dev,
880 struct resource *res);
881 struct pci_dev *pci_find_pcie_root_port(struct pci_dev *dev);
882 u8 pci_swizzle_interrupt_pin(const struct pci_dev *dev, u8 pin);
883 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
884 u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
885 struct pci_dev *pci_dev_get(struct pci_dev *dev);
886 void pci_dev_put(struct pci_dev *dev);
887 void pci_remove_bus(struct pci_bus *b);
888 void pci_stop_and_remove_bus_device(struct pci_dev *dev);
889 void pci_stop_and_remove_bus_device_locked(struct pci_dev *dev);
890 void pci_stop_root_bus(struct pci_bus *bus);
891 void pci_remove_root_bus(struct pci_bus *bus);
892 void pci_setup_cardbus(struct pci_bus *bus);
893 void pcibios_setup_bridge(struct pci_bus *bus, unsigned long type);
894 void pci_sort_breadthfirst(void);
895 #define dev_is_pci(d) ((d)->bus == &pci_bus_type)
896 #define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false))
898 /* Generic PCI functions exported to card drivers */
900 enum pci_lost_interrupt_reason {
901 PCI_LOST_IRQ_NO_INFORMATION = 0,
902 PCI_LOST_IRQ_DISABLE_MSI,
903 PCI_LOST_IRQ_DISABLE_MSIX,
904 PCI_LOST_IRQ_DISABLE_ACPI,
906 enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *dev);
907 int pci_find_capability(struct pci_dev *dev, int cap);
908 int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
909 int pci_find_ext_capability(struct pci_dev *dev, int cap);
910 int pci_find_next_ext_capability(struct pci_dev *dev, int pos, int cap);
911 int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
912 int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
913 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
915 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
916 struct pci_dev *from);
917 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
918 unsigned int ss_vendor, unsigned int ss_device,
919 struct pci_dev *from);
920 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
921 struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
923 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
926 return pci_get_domain_bus_and_slot(0, bus, devfn);
928 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
929 int pci_dev_present(const struct pci_device_id *ids);
931 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
933 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
934 int where, u16 *val);
935 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
936 int where, u32 *val);
937 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
939 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
941 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
944 int pci_generic_config_read(struct pci_bus *bus, unsigned int devfn,
945 int where, int size, u32 *val);
946 int pci_generic_config_write(struct pci_bus *bus, unsigned int devfn,
947 int where, int size, u32 val);
948 int pci_generic_config_read32(struct pci_bus *bus, unsigned int devfn,
949 int where, int size, u32 *val);
950 int pci_generic_config_write32(struct pci_bus *bus, unsigned int devfn,
951 int where, int size, u32 val);
953 struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
955 int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val);
956 int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val);
957 int pci_read_config_dword(const struct pci_dev *dev, int where, u32 *val);
958 int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val);
959 int pci_write_config_word(const struct pci_dev *dev, int where, u16 val);
960 int pci_write_config_dword(const struct pci_dev *dev, int where, u32 val);
962 int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val);
963 int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val);
964 int pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val);
965 int pcie_capability_write_dword(struct pci_dev *dev, int pos, u32 val);
966 int pcie_capability_clear_and_set_word(struct pci_dev *dev, int pos,
968 int pcie_capability_clear_and_set_dword(struct pci_dev *dev, int pos,
971 static inline int pcie_capability_set_word(struct pci_dev *dev, int pos,
974 return pcie_capability_clear_and_set_word(dev, pos, 0, set);
977 static inline int pcie_capability_set_dword(struct pci_dev *dev, int pos,
980 return pcie_capability_clear_and_set_dword(dev, pos, 0, set);
983 static inline int pcie_capability_clear_word(struct pci_dev *dev, int pos,
986 return pcie_capability_clear_and_set_word(dev, pos, clear, 0);
989 static inline int pcie_capability_clear_dword(struct pci_dev *dev, int pos,
992 return pcie_capability_clear_and_set_dword(dev, pos, clear, 0);
995 /* user-space driven config access */
996 int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
997 int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
998 int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val);
999 int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val);
1000 int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val);
1001 int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val);
1003 int __must_check pci_enable_device(struct pci_dev *dev);
1004 int __must_check pci_enable_device_io(struct pci_dev *dev);
1005 int __must_check pci_enable_device_mem(struct pci_dev *dev);
1006 int __must_check pci_reenable_device(struct pci_dev *);
1007 int __must_check pcim_enable_device(struct pci_dev *pdev);
1008 void pcim_pin_device(struct pci_dev *pdev);
1010 static inline int pci_is_enabled(struct pci_dev *pdev)
1012 return (atomic_read(&pdev->enable_cnt) > 0);
1015 static inline int pci_is_managed(struct pci_dev *pdev)
1017 return pdev->is_managed;
1020 void pci_disable_device(struct pci_dev *dev);
1022 extern unsigned int pcibios_max_latency;
1023 void pci_set_master(struct pci_dev *dev);
1024 void pci_clear_master(struct pci_dev *dev);
1026 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
1027 int pci_set_cacheline_size(struct pci_dev *dev);
1028 #define HAVE_PCI_SET_MWI
1029 int __must_check pci_set_mwi(struct pci_dev *dev);
1030 int pci_try_set_mwi(struct pci_dev *dev);
1031 void pci_clear_mwi(struct pci_dev *dev);
1032 void pci_intx(struct pci_dev *dev, int enable);
1033 bool pci_intx_mask_supported(struct pci_dev *dev);
1034 bool pci_check_and_mask_intx(struct pci_dev *dev);
1035 bool pci_check_and_unmask_intx(struct pci_dev *dev);
1036 int pci_wait_for_pending(struct pci_dev *dev, int pos, u16 mask);
1037 int pci_wait_for_pending_transaction(struct pci_dev *dev);
1038 int pcix_get_max_mmrbc(struct pci_dev *dev);
1039 int pcix_get_mmrbc(struct pci_dev *dev);
1040 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
1041 int pcie_get_readrq(struct pci_dev *dev);
1042 int pcie_set_readrq(struct pci_dev *dev, int rq);
1043 int pcie_get_mps(struct pci_dev *dev);
1044 int pcie_set_mps(struct pci_dev *dev, int mps);
1045 int pcie_get_minimum_link(struct pci_dev *dev, enum pci_bus_speed *speed,
1046 enum pcie_link_width *width);
1047 void pcie_flr(struct pci_dev *dev);
1048 int __pci_reset_function(struct pci_dev *dev);
1049 int __pci_reset_function_locked(struct pci_dev *dev);
1050 int pci_reset_function(struct pci_dev *dev);
1051 int pci_try_reset_function(struct pci_dev *dev);
1052 int pci_probe_reset_slot(struct pci_slot *slot);
1053 int pci_reset_slot(struct pci_slot *slot);
1054 int pci_try_reset_slot(struct pci_slot *slot);
1055 int pci_probe_reset_bus(struct pci_bus *bus);
1056 int pci_reset_bus(struct pci_bus *bus);
1057 int pci_try_reset_bus(struct pci_bus *bus);
1058 void pci_reset_secondary_bus(struct pci_dev *dev);
1059 void pcibios_reset_secondary_bus(struct pci_dev *dev);
1060 void pci_reset_bridge_secondary_bus(struct pci_dev *dev);
1061 void pci_update_resource(struct pci_dev *dev, int resno);
1062 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
1063 int __must_check pci_reassign_resource(struct pci_dev *dev, int i, resource_size_t add_size, resource_size_t align);
1064 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
1065 bool pci_device_is_present(struct pci_dev *pdev);
1066 void pci_ignore_hotplug(struct pci_dev *dev);
1068 int __printf(6, 7) pci_request_irq(struct pci_dev *dev, unsigned int nr,
1069 irq_handler_t handler, irq_handler_t thread_fn, void *dev_id,
1070 const char *fmt, ...);
1071 void pci_free_irq(struct pci_dev *dev, unsigned int nr, void *dev_id);
1073 /* ROM control related routines */
1074 int pci_enable_rom(struct pci_dev *pdev);
1075 void pci_disable_rom(struct pci_dev *pdev);
1076 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
1077 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
1078 size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size);
1079 void __iomem __must_check *pci_platform_rom(struct pci_dev *pdev, size_t *size);
1081 /* Power management related routines */
1082 int pci_save_state(struct pci_dev *dev);
1083 void pci_restore_state(struct pci_dev *dev);
1084 struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev);
1085 int pci_load_saved_state(struct pci_dev *dev,
1086 struct pci_saved_state *state);
1087 int pci_load_and_free_saved_state(struct pci_dev *dev,
1088 struct pci_saved_state **state);
1089 struct pci_cap_saved_state *pci_find_saved_cap(struct pci_dev *dev, char cap);
1090 struct pci_cap_saved_state *pci_find_saved_ext_cap(struct pci_dev *dev,
1092 int pci_add_cap_save_buffer(struct pci_dev *dev, char cap, unsigned int size);
1093 int pci_add_ext_cap_save_buffer(struct pci_dev *dev,
1094 u16 cap, unsigned int size);
1095 int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state);
1096 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
1097 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
1098 bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
1099 void pci_pme_active(struct pci_dev *dev, bool enable);
1100 int __pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1101 bool runtime, bool enable);
1102 int pci_wake_from_d3(struct pci_dev *dev, bool enable);
1103 int pci_prepare_to_sleep(struct pci_dev *dev);
1104 int pci_back_from_sleep(struct pci_dev *dev);
1105 bool pci_dev_run_wake(struct pci_dev *dev);
1106 bool pci_check_pme_status(struct pci_dev *dev);
1107 void pci_pme_wakeup_bus(struct pci_bus *bus);
1108 void pci_d3cold_enable(struct pci_dev *dev);
1109 void pci_d3cold_disable(struct pci_dev *dev);
1111 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1114 return __pci_enable_wake(dev, state, false, enable);
1117 /* PCI Virtual Channel */
1118 int pci_save_vc_state(struct pci_dev *dev);
1119 void pci_restore_vc_state(struct pci_dev *dev);
1120 void pci_allocate_vc_save_buffers(struct pci_dev *dev);
1122 /* For use by arch with custom probe code */
1123 void set_pcie_port_type(struct pci_dev *pdev);
1124 void set_pcie_hotplug_bridge(struct pci_dev *pdev);
1126 /* Functions for PCI Hotplug drivers to use */
1127 int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
1128 unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge);
1129 unsigned int pci_rescan_bus(struct pci_bus *bus);
1130 void pci_lock_rescan_remove(void);
1131 void pci_unlock_rescan_remove(void);
1133 /* Vital product data routines */
1134 ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
1135 ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
1136 int pci_set_vpd_size(struct pci_dev *dev, size_t len);
1138 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
1139 resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx);
1140 void pci_bus_assign_resources(const struct pci_bus *bus);
1141 void pci_bus_claim_resources(struct pci_bus *bus);
1142 void pci_bus_size_bridges(struct pci_bus *bus);
1143 int pci_claim_resource(struct pci_dev *, int);
1144 int pci_claim_bridge_resource(struct pci_dev *bridge, int i);
1145 void pci_assign_unassigned_resources(void);
1146 void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
1147 void pci_assign_unassigned_bus_resources(struct pci_bus *bus);
1148 void pci_assign_unassigned_root_bus_resources(struct pci_bus *bus);
1149 void pdev_enable_device(struct pci_dev *);
1150 int pci_enable_resources(struct pci_dev *, int mask);
1151 void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
1152 int (*)(const struct pci_dev *, u8, u8));
1153 struct resource *pci_find_resource(struct pci_dev *dev, struct resource *res);
1154 #define HAVE_PCI_REQ_REGIONS 2
1155 int __must_check pci_request_regions(struct pci_dev *, const char *);
1156 int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
1157 void pci_release_regions(struct pci_dev *);
1158 int __must_check pci_request_region(struct pci_dev *, int, const char *);
1159 int __must_check pci_request_region_exclusive(struct pci_dev *, int, const char *);
1160 void pci_release_region(struct pci_dev *, int);
1161 int pci_request_selected_regions(struct pci_dev *, int, const char *);
1162 int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
1163 void pci_release_selected_regions(struct pci_dev *, int);
1165 /* drivers/pci/bus.c */
1166 struct pci_bus *pci_bus_get(struct pci_bus *bus);
1167 void pci_bus_put(struct pci_bus *bus);
1168 void pci_add_resource(struct list_head *resources, struct resource *res);
1169 void pci_add_resource_offset(struct list_head *resources, struct resource *res,
1170 resource_size_t offset);
1171 void pci_free_resource_list(struct list_head *resources);
1172 void pci_bus_add_resource(struct pci_bus *bus, struct resource *res,
1173 unsigned int flags);
1174 struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n);
1175 void pci_bus_remove_resources(struct pci_bus *bus);
1176 int devm_request_pci_bus_resources(struct device *dev,
1177 struct list_head *resources);
1179 #define pci_bus_for_each_resource(bus, res, i) \
1181 (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
1184 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
1185 struct resource *res, resource_size_t size,
1186 resource_size_t align, resource_size_t min,
1187 unsigned long type_mask,
1188 resource_size_t (*alignf)(void *,
1189 const struct resource *,
1195 int pci_register_io_range(phys_addr_t addr, resource_size_t size);
1196 unsigned long pci_address_to_pio(phys_addr_t addr);
1197 phys_addr_t pci_pio_to_address(unsigned long pio);
1198 int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr);
1199 void pci_unmap_iospace(struct resource *res);
1200 void __iomem *devm_pci_remap_cfgspace(struct device *dev,
1201 resource_size_t offset,
1202 resource_size_t size);
1203 void __iomem *devm_pci_remap_cfg_resource(struct device *dev,
1204 struct resource *res);
1206 static inline pci_bus_addr_t pci_bus_address(struct pci_dev *pdev, int bar)
1208 struct pci_bus_region region;
1210 pcibios_resource_to_bus(pdev->bus, ®ion, &pdev->resource[bar]);
1211 return region.start;
1214 /* Proper probing supporting hot-pluggable devices */
1215 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
1216 const char *mod_name);
1219 * pci_register_driver must be a macro so that KBUILD_MODNAME can be expanded
1221 #define pci_register_driver(driver) \
1222 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
1224 void pci_unregister_driver(struct pci_driver *dev);
1227 * module_pci_driver() - Helper macro for registering a PCI driver
1228 * @__pci_driver: pci_driver struct
1230 * Helper macro for PCI drivers which do not do anything special in module
1231 * init/exit. This eliminates a lot of boilerplate. Each module may only
1232 * use this macro once, and calling it replaces module_init() and module_exit()
1234 #define module_pci_driver(__pci_driver) \
1235 module_driver(__pci_driver, pci_register_driver, \
1236 pci_unregister_driver)
1239 * builtin_pci_driver() - Helper macro for registering a PCI driver
1240 * @__pci_driver: pci_driver struct
1242 * Helper macro for PCI drivers which do not do anything special in their
1243 * init code. This eliminates a lot of boilerplate. Each driver may only
1244 * use this macro once, and calling it replaces device_initcall(...)
1246 #define builtin_pci_driver(__pci_driver) \
1247 builtin_driver(__pci_driver, pci_register_driver)
1249 struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
1250 int pci_add_dynid(struct pci_driver *drv,
1251 unsigned int vendor, unsigned int device,
1252 unsigned int subvendor, unsigned int subdevice,
1253 unsigned int class, unsigned int class_mask,
1254 unsigned long driver_data);
1255 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
1256 struct pci_dev *dev);
1257 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
1260 void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
1262 int pci_cfg_space_size(struct pci_dev *dev);
1263 unsigned char pci_bus_max_busnr(struct pci_bus *bus);
1264 void pci_setup_bridge(struct pci_bus *bus);
1265 resource_size_t pcibios_window_alignment(struct pci_bus *bus,
1266 unsigned long type);
1267 resource_size_t pcibios_iov_resource_alignment(struct pci_dev *dev, int resno);
1269 #define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
1270 #define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)
1272 int pci_set_vga_state(struct pci_dev *pdev, bool decode,
1273 unsigned int command_bits, u32 flags);
1275 #define PCI_IRQ_LEGACY (1 << 0) /* allow legacy interrupts */
1276 #define PCI_IRQ_MSI (1 << 1) /* allow MSI interrupts */
1277 #define PCI_IRQ_MSIX (1 << 2) /* allow MSI-X interrupts */
1278 #define PCI_IRQ_AFFINITY (1 << 3) /* auto-assign affinity */
1279 #define PCI_IRQ_ALL_TYPES \
1280 (PCI_IRQ_LEGACY | PCI_IRQ_MSI | PCI_IRQ_MSIX)
1282 /* kmem_cache style wrapper around pci_alloc_consistent() */
1284 #include <linux/pci-dma.h>
1285 #include <linux/dmapool.h>
1287 #define pci_pool dma_pool
1288 #define pci_pool_create(name, pdev, size, align, allocation) \
1289 dma_pool_create(name, &pdev->dev, size, align, allocation)
1290 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
1291 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
1292 #define pci_pool_zalloc(pool, flags, handle) \
1293 dma_pool_zalloc(pool, flags, handle)
1294 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
1297 u32 vector; /* kernel uses to write allocated vector */
1298 u16 entry; /* driver uses to specify entry, OS writes */
1301 #ifdef CONFIG_PCI_MSI
1302 int pci_msi_vec_count(struct pci_dev *dev);
1303 void pci_disable_msi(struct pci_dev *dev);
1304 int pci_msix_vec_count(struct pci_dev *dev);
1305 void pci_disable_msix(struct pci_dev *dev);
1306 void pci_restore_msi_state(struct pci_dev *dev);
1307 int pci_msi_enabled(void);
1308 int pci_enable_msi(struct pci_dev *dev);
1309 int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
1310 int minvec, int maxvec);
1311 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1312 struct msix_entry *entries, int nvec)
1314 int rc = pci_enable_msix_range(dev, entries, nvec, nvec);
1319 int pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1320 unsigned int max_vecs, unsigned int flags,
1321 const struct irq_affinity *affd);
1323 void pci_free_irq_vectors(struct pci_dev *dev);
1324 int pci_irq_vector(struct pci_dev *dev, unsigned int nr);
1325 const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev, int vec);
1326 int pci_irq_get_node(struct pci_dev *pdev, int vec);
1329 static inline int pci_msi_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1330 static inline void pci_disable_msi(struct pci_dev *dev) { }
1331 static inline int pci_msix_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1332 static inline void pci_disable_msix(struct pci_dev *dev) { }
1333 static inline void pci_restore_msi_state(struct pci_dev *dev) { }
1334 static inline int pci_msi_enabled(void) { return 0; }
1335 static inline int pci_enable_msi(struct pci_dev *dev)
1337 static inline int pci_enable_msix_range(struct pci_dev *dev,
1338 struct msix_entry *entries, int minvec, int maxvec)
1340 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1341 struct msix_entry *entries, int nvec)
1345 pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
1346 unsigned int max_vecs, unsigned int flags,
1347 const struct irq_affinity *aff_desc)
1354 static inline void pci_free_irq_vectors(struct pci_dev *dev)
1358 static inline int pci_irq_vector(struct pci_dev *dev, unsigned int nr)
1360 if (WARN_ON_ONCE(nr > 0))
1364 static inline const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev,
1367 return cpu_possible_mask;
1370 static inline int pci_irq_get_node(struct pci_dev *pdev, int vec)
1372 return first_online_node;
1377 pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs,
1378 unsigned int max_vecs, unsigned int flags)
1380 return pci_alloc_irq_vectors_affinity(dev, min_vecs, max_vecs, flags,
1384 #ifdef CONFIG_PCIEPORTBUS
1385 extern bool pcie_ports_disabled;
1386 extern bool pcie_ports_auto;
1388 #define pcie_ports_disabled true
1389 #define pcie_ports_auto false
1392 #ifdef CONFIG_PCIEASPM
1393 bool pcie_aspm_support_enabled(void);
1395 static inline bool pcie_aspm_support_enabled(void) { return false; }
1398 #ifdef CONFIG_PCIEAER
1399 void pci_no_aer(void);
1400 bool pci_aer_available(void);
1401 int pci_aer_init(struct pci_dev *dev);
1403 static inline void pci_no_aer(void) { }
1404 static inline bool pci_aer_available(void) { return false; }
1405 static inline int pci_aer_init(struct pci_dev *d) { return -ENODEV; }
1408 #ifdef CONFIG_PCIE_ECRC
1409 void pcie_set_ecrc_checking(struct pci_dev *dev);
1410 void pcie_ecrc_get_policy(char *str);
1412 static inline void pcie_set_ecrc_checking(struct pci_dev *dev) { }
1413 static inline void pcie_ecrc_get_policy(char *str) { }
1416 #ifdef CONFIG_HT_IRQ
1417 /* The functions a driver should call */
1418 int ht_create_irq(struct pci_dev *dev, int idx);
1419 void ht_destroy_irq(unsigned int irq);
1420 #endif /* CONFIG_HT_IRQ */
1422 #ifdef CONFIG_PCI_ATS
1423 /* Address Translation Service */
1424 void pci_ats_init(struct pci_dev *dev);
1425 int pci_enable_ats(struct pci_dev *dev, int ps);
1426 void pci_disable_ats(struct pci_dev *dev);
1427 int pci_ats_queue_depth(struct pci_dev *dev);
1429 static inline void pci_ats_init(struct pci_dev *d) { }
1430 static inline int pci_enable_ats(struct pci_dev *d, int ps) { return -ENODEV; }
1431 static inline void pci_disable_ats(struct pci_dev *d) { }
1432 static inline int pci_ats_queue_depth(struct pci_dev *d) { return -ENODEV; }
1435 #ifdef CONFIG_PCIE_PTM
1436 int pci_enable_ptm(struct pci_dev *dev, u8 *granularity);
1438 static inline int pci_enable_ptm(struct pci_dev *dev, u8 *granularity)
1442 void pci_cfg_access_lock(struct pci_dev *dev);
1443 bool pci_cfg_access_trylock(struct pci_dev *dev);
1444 void pci_cfg_access_unlock(struct pci_dev *dev);
1447 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
1448 * a PCI domain is defined to be a set of PCI buses which share
1449 * configuration space.
1451 #ifdef CONFIG_PCI_DOMAINS
1452 extern int pci_domains_supported;
1453 int pci_get_new_domain_nr(void);
1455 enum { pci_domains_supported = 0 };
1456 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1457 static inline int pci_proc_domain(struct pci_bus *bus) { return 0; }
1458 static inline int pci_get_new_domain_nr(void) { return -ENOSYS; }
1459 #endif /* CONFIG_PCI_DOMAINS */
1462 * Generic implementation for PCI domain support. If your
1463 * architecture does not need custom management of PCI
1464 * domains then this implementation will be used
1466 #ifdef CONFIG_PCI_DOMAINS_GENERIC
1467 static inline int pci_domain_nr(struct pci_bus *bus)
1469 return bus->domain_nr;
1472 int acpi_pci_bus_find_domain_nr(struct pci_bus *bus);
1474 static inline int acpi_pci_bus_find_domain_nr(struct pci_bus *bus)
1477 int pci_bus_find_domain_nr(struct pci_bus *bus, struct device *parent);
1480 /* some architectures require additional setup to direct VGA traffic */
1481 typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
1482 unsigned int command_bits, u32 flags);
1483 void pci_register_set_vga_state(arch_set_vga_state_t func);
1486 pci_request_io_regions(struct pci_dev *pdev, const char *name)
1488 return pci_request_selected_regions(pdev,
1489 pci_select_bars(pdev, IORESOURCE_IO), name);
1493 pci_release_io_regions(struct pci_dev *pdev)
1495 return pci_release_selected_regions(pdev,
1496 pci_select_bars(pdev, IORESOURCE_IO));
1500 pci_request_mem_regions(struct pci_dev *pdev, const char *name)
1502 return pci_request_selected_regions(pdev,
1503 pci_select_bars(pdev, IORESOURCE_MEM), name);
1507 pci_release_mem_regions(struct pci_dev *pdev)
1509 return pci_release_selected_regions(pdev,
1510 pci_select_bars(pdev, IORESOURCE_MEM));
1513 #else /* CONFIG_PCI is not enabled */
1515 static inline void pci_set_flags(int flags) { }
1516 static inline void pci_add_flags(int flags) { }
1517 static inline void pci_clear_flags(int flags) { }
1518 static inline int pci_has_flag(int flag) { return 0; }
1521 * If the system does not have PCI, clearly these return errors. Define
1522 * these as simple inline functions to avoid hair in drivers.
1525 #define _PCI_NOP(o, s, t) \
1526 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
1528 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
1530 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
1531 _PCI_NOP(o, word, u16 x) \
1532 _PCI_NOP(o, dword, u32 x)
1533 _PCI_NOP_ALL(read, *)
1534 _PCI_NOP_ALL(write,)
1536 static inline struct pci_dev *pci_get_device(unsigned int vendor,
1537 unsigned int device,
1538 struct pci_dev *from)
1541 static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
1542 unsigned int device,
1543 unsigned int ss_vendor,
1544 unsigned int ss_device,
1545 struct pci_dev *from)
1548 static inline struct pci_dev *pci_get_class(unsigned int class,
1549 struct pci_dev *from)
1552 #define pci_dev_present(ids) (0)
1553 #define no_pci_devices() (1)
1554 #define pci_dev_put(dev) do { } while (0)
1556 static inline void pci_set_master(struct pci_dev *dev) { }
1557 static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
1558 static inline void pci_disable_device(struct pci_dev *dev) { }
1559 static inline int pci_assign_resource(struct pci_dev *dev, int i)
1561 static inline int __pci_register_driver(struct pci_driver *drv,
1562 struct module *owner)
1564 static inline int pci_register_driver(struct pci_driver *drv)
1566 static inline void pci_unregister_driver(struct pci_driver *drv) { }
1567 static inline int pci_find_capability(struct pci_dev *dev, int cap)
1569 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
1572 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
1575 /* Power management related routines */
1576 static inline int pci_save_state(struct pci_dev *dev) { return 0; }
1577 static inline void pci_restore_state(struct pci_dev *dev) { }
1578 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
1580 static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable)
1582 static inline pci_power_t pci_choose_state(struct pci_dev *dev,
1585 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1589 static inline struct resource *pci_find_resource(struct pci_dev *dev,
1590 struct resource *res)
1592 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
1594 static inline void pci_release_regions(struct pci_dev *dev) { }
1596 static inline unsigned long pci_address_to_pio(phys_addr_t addr) { return -1; }
1598 static inline void pci_block_cfg_access(struct pci_dev *dev) { }
1599 static inline int pci_block_cfg_access_in_atomic(struct pci_dev *dev)
1601 static inline void pci_unblock_cfg_access(struct pci_dev *dev) { }
1603 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
1605 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
1608 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
1612 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1613 static inline struct pci_dev *pci_dev_get(struct pci_dev *dev) { return NULL; }
1614 static inline int pci_get_new_domain_nr(void) { return -ENOSYS; }
1616 #define dev_is_pci(d) (false)
1617 #define dev_is_pf(d) (false)
1618 #endif /* CONFIG_PCI */
1620 /* Include architecture-dependent settings and functions */
1622 #include <asm/pci.h>
1624 /* These two functions provide almost identical functionality. Depennding
1625 * on the architecture, one will be implemented as a wrapper around the
1626 * other (in drivers/pci/mmap.c).
1628 * pci_mmap_resource_range() maps a specific BAR, and vm->vm_pgoff
1629 * is expected to be an offset within that region.
1631 * pci_mmap_page_range() is the legacy architecture-specific interface,
1632 * which accepts a "user visible" resource address converted by
1633 * pci_resource_to_user(), as used in the legacy mmap() interface in
1636 int pci_mmap_resource_range(struct pci_dev *dev, int bar,
1637 struct vm_area_struct *vma,
1638 enum pci_mmap_state mmap_state, int write_combine);
1639 int pci_mmap_page_range(struct pci_dev *pdev, int bar,
1640 struct vm_area_struct *vma,
1641 enum pci_mmap_state mmap_state, int write_combine);
1643 #ifndef arch_can_pci_mmap_wc
1644 #define arch_can_pci_mmap_wc() 0
1647 #ifndef arch_can_pci_mmap_io
1648 #define arch_can_pci_mmap_io() 0
1649 #define pci_iobar_pfn(pdev, bar, vma) (-EINVAL)
1651 int pci_iobar_pfn(struct pci_dev *pdev, int bar, struct vm_area_struct *vma);
1654 #ifndef pci_root_bus_fwnode
1655 #define pci_root_bus_fwnode(bus) NULL
1658 /* these helpers provide future and backwards compatibility
1659 * for accessing popular PCI BAR info */
1660 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
1661 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
1662 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
1663 #define pci_resource_len(dev,bar) \
1664 ((pci_resource_start((dev), (bar)) == 0 && \
1665 pci_resource_end((dev), (bar)) == \
1666 pci_resource_start((dev), (bar))) ? 0 : \
1668 (pci_resource_end((dev), (bar)) - \
1669 pci_resource_start((dev), (bar)) + 1))
1671 /* Similar to the helpers above, these manipulate per-pci_dev
1672 * driver-specific data. They are really just a wrapper around
1673 * the generic device structure functions of these calls.
1675 static inline void *pci_get_drvdata(struct pci_dev *pdev)
1677 return dev_get_drvdata(&pdev->dev);
1680 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
1682 dev_set_drvdata(&pdev->dev, data);
1685 /* If you want to know what to call your pci_dev, ask this function.
1686 * Again, it's a wrapper around the generic device.
1688 static inline const char *pci_name(const struct pci_dev *pdev)
1690 return dev_name(&pdev->dev);
1694 /* Some archs don't want to expose struct resource to userland as-is
1695 * in sysfs and /proc
1697 #ifdef HAVE_ARCH_PCI_RESOURCE_TO_USER
1698 void pci_resource_to_user(const struct pci_dev *dev, int bar,
1699 const struct resource *rsrc,
1700 resource_size_t *start, resource_size_t *end);
1702 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
1703 const struct resource *rsrc, resource_size_t *start,
1704 resource_size_t *end)
1706 *start = rsrc->start;
1709 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
1713 * The world is not perfect and supplies us with broken PCI devices.
1714 * For at least a part of these bugs we need a work-around, so both
1715 * generic (drivers/pci/quirks.c) and per-architecture code can define
1716 * fixup hooks to be called for particular buggy devices.
1720 u16 vendor; /* You can use PCI_ANY_ID here of course */
1721 u16 device; /* You can use PCI_ANY_ID here of course */
1722 u32 class; /* You can use PCI_ANY_ID here too */
1723 unsigned int class_shift; /* should be 0, 8, 16 */
1724 void (*hook)(struct pci_dev *dev);
1727 enum pci_fixup_pass {
1728 pci_fixup_early, /* Before probing BARs */
1729 pci_fixup_header, /* After reading configuration header */
1730 pci_fixup_final, /* Final phase of device fixups */
1731 pci_fixup_enable, /* pci_enable_device() time */
1732 pci_fixup_resume, /* pci_device_resume() */
1733 pci_fixup_suspend, /* pci_device_suspend() */
1734 pci_fixup_resume_early, /* pci_device_resume_early() */
1735 pci_fixup_suspend_late, /* pci_device_suspend_late() */
1738 /* Anonymous variables would be nice... */
1739 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \
1740 class_shift, hook) \
1741 static const struct pci_fixup __PASTE(__pci_fixup_##name,__LINE__) __used \
1742 __attribute__((__section__(#section), aligned((sizeof(void *))))) \
1743 = { vendor, device, class, class_shift, hook };
1745 #define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class, \
1746 class_shift, hook) \
1747 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1748 hook, vendor, device, class, class_shift, hook)
1749 #define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class, \
1750 class_shift, hook) \
1751 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1752 hook, vendor, device, class, class_shift, hook)
1753 #define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class, \
1754 class_shift, hook) \
1755 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1756 hook, vendor, device, class, class_shift, hook)
1757 #define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class, \
1758 class_shift, hook) \
1759 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1760 hook, vendor, device, class, class_shift, hook)
1761 #define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class, \
1762 class_shift, hook) \
1763 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1764 resume##hook, vendor, device, class, \
1766 #define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class, \
1767 class_shift, hook) \
1768 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1769 resume_early##hook, vendor, device, \
1770 class, class_shift, hook)
1771 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class, \
1772 class_shift, hook) \
1773 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1774 suspend##hook, vendor, device, class, \
1776 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND_LATE(vendor, device, class, \
1777 class_shift, hook) \
1778 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
1779 suspend_late##hook, vendor, device, \
1780 class, class_shift, hook)
1782 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
1783 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1784 hook, vendor, device, PCI_ANY_ID, 0, hook)
1785 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
1786 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1787 hook, vendor, device, PCI_ANY_ID, 0, hook)
1788 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
1789 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1790 hook, vendor, device, PCI_ANY_ID, 0, hook)
1791 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
1792 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1793 hook, vendor, device, PCI_ANY_ID, 0, hook)
1794 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
1795 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1796 resume##hook, vendor, device, \
1797 PCI_ANY_ID, 0, hook)
1798 #define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
1799 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1800 resume_early##hook, vendor, device, \
1801 PCI_ANY_ID, 0, hook)
1802 #define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
1803 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1804 suspend##hook, vendor, device, \
1805 PCI_ANY_ID, 0, hook)
1806 #define DECLARE_PCI_FIXUP_SUSPEND_LATE(vendor, device, hook) \
1807 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
1808 suspend_late##hook, vendor, device, \
1809 PCI_ANY_ID, 0, hook)
1811 #ifdef CONFIG_PCI_QUIRKS
1812 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
1813 int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags);
1814 int pci_dev_specific_enable_acs(struct pci_dev *dev);
1816 static inline void pci_fixup_device(enum pci_fixup_pass pass,
1817 struct pci_dev *dev) { }
1818 static inline int pci_dev_specific_acs_enabled(struct pci_dev *dev,
1823 static inline int pci_dev_specific_enable_acs(struct pci_dev *dev)
1829 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
1830 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
1831 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
1832 int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name);
1833 int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
1835 void pcim_iounmap_regions(struct pci_dev *pdev, int mask);
1837 extern int pci_pci_problems;
1838 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
1839 #define PCIPCI_TRITON 2
1840 #define PCIPCI_NATOMA 4
1841 #define PCIPCI_VIAETBF 8
1842 #define PCIPCI_VSFX 16
1843 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
1844 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
1846 extern unsigned long pci_cardbus_io_size;
1847 extern unsigned long pci_cardbus_mem_size;
1848 extern u8 pci_dfl_cache_line_size;
1849 extern u8 pci_cache_line_size;
1851 extern unsigned long pci_hotplug_io_size;
1852 extern unsigned long pci_hotplug_mem_size;
1853 extern unsigned long pci_hotplug_bus_size;
1855 /* Architecture-specific versions may override these (weak) */
1856 void pcibios_disable_device(struct pci_dev *dev);
1857 void pcibios_set_master(struct pci_dev *dev);
1858 int pcibios_set_pcie_reset_state(struct pci_dev *dev,
1859 enum pcie_reset_state state);
1860 int pcibios_add_device(struct pci_dev *dev);
1861 void pcibios_release_device(struct pci_dev *dev);
1862 void pcibios_penalize_isa_irq(int irq, int active);
1863 int pcibios_alloc_irq(struct pci_dev *dev);
1864 void pcibios_free_irq(struct pci_dev *dev);
1866 #ifdef CONFIG_HIBERNATE_CALLBACKS
1867 extern struct dev_pm_ops pcibios_pm_ops;
1870 #if defined(CONFIG_PCI_MMCONFIG) || defined(CONFIG_ACPI_MCFG)
1871 void __init pci_mmcfg_early_init(void);
1872 void __init pci_mmcfg_late_init(void);
1874 static inline void pci_mmcfg_early_init(void) { }
1875 static inline void pci_mmcfg_late_init(void) { }
1878 int pci_ext_cfg_avail(void);
1880 void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
1881 void __iomem *pci_ioremap_wc_bar(struct pci_dev *pdev, int bar);
1883 #ifdef CONFIG_PCI_IOV
1884 int pci_iov_virtfn_bus(struct pci_dev *dev, int id);
1885 int pci_iov_virtfn_devfn(struct pci_dev *dev, int id);
1887 int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
1888 void pci_disable_sriov(struct pci_dev *dev);
1889 int pci_iov_add_virtfn(struct pci_dev *dev, int id, int reset);
1890 void pci_iov_remove_virtfn(struct pci_dev *dev, int id, int reset);
1891 int pci_num_vf(struct pci_dev *dev);
1892 int pci_vfs_assigned(struct pci_dev *dev);
1893 int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs);
1894 int pci_sriov_get_totalvfs(struct pci_dev *dev);
1895 resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno);
1897 static inline int pci_iov_virtfn_bus(struct pci_dev *dev, int id)
1901 static inline int pci_iov_virtfn_devfn(struct pci_dev *dev, int id)
1905 static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
1907 static inline int pci_iov_add_virtfn(struct pci_dev *dev, int id, int reset)
1911 static inline void pci_iov_remove_virtfn(struct pci_dev *dev,
1912 int id, int reset) { }
1913 static inline void pci_disable_sriov(struct pci_dev *dev) { }
1914 static inline int pci_num_vf(struct pci_dev *dev) { return 0; }
1915 static inline int pci_vfs_assigned(struct pci_dev *dev)
1917 static inline int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs)
1919 static inline int pci_sriov_get_totalvfs(struct pci_dev *dev)
1921 static inline resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno)
1925 #if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
1926 void pci_hp_create_module_link(struct pci_slot *pci_slot);
1927 void pci_hp_remove_module_link(struct pci_slot *pci_slot);
1931 * pci_pcie_cap - get the saved PCIe capability offset
1934 * PCIe capability offset is calculated at PCI device initialization
1935 * time and saved in the data structure. This function returns saved
1936 * PCIe capability offset. Using this instead of pci_find_capability()
1937 * reduces unnecessary search in the PCI configuration space. If you
1938 * need to calculate PCIe capability offset from raw device for some
1939 * reasons, please use pci_find_capability() instead.
1941 static inline int pci_pcie_cap(struct pci_dev *dev)
1943 return dev->pcie_cap;
1947 * pci_is_pcie - check if the PCI device is PCI Express capable
1950 * Returns: true if the PCI device is PCI Express capable, false otherwise.
1952 static inline bool pci_is_pcie(struct pci_dev *dev)
1954 return pci_pcie_cap(dev);
1958 * pcie_caps_reg - get the PCIe Capabilities Register
1961 static inline u16 pcie_caps_reg(const struct pci_dev *dev)
1963 return dev->pcie_flags_reg;
1967 * pci_pcie_type - get the PCIe device/port type
1970 static inline int pci_pcie_type(const struct pci_dev *dev)
1972 return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4;
1975 static inline struct pci_dev *pcie_find_root_port(struct pci_dev *dev)
1978 if (!pci_is_pcie(dev))
1980 if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT)
1982 if (!dev->bus->self)
1984 dev = dev->bus->self;
1989 void pci_request_acs(void);
1990 bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags);
1991 bool pci_acs_path_enabled(struct pci_dev *start,
1992 struct pci_dev *end, u16 acs_flags);
1994 #define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */
1995 #define PCI_VPD_LRDT_ID(x) ((x) | PCI_VPD_LRDT)
1997 /* Large Resource Data Type Tag Item Names */
1998 #define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */
1999 #define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */
2000 #define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */
2002 #define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING)
2003 #define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA)
2004 #define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA)
2006 /* Small Resource Data Type Tag Item Names */
2007 #define PCI_VPD_STIN_END 0x0f /* End */
2009 #define PCI_VPD_SRDT_END (PCI_VPD_STIN_END << 3)
2011 #define PCI_VPD_SRDT_TIN_MASK 0x78
2012 #define PCI_VPD_SRDT_LEN_MASK 0x07
2013 #define PCI_VPD_LRDT_TIN_MASK 0x7f
2015 #define PCI_VPD_LRDT_TAG_SIZE 3
2016 #define PCI_VPD_SRDT_TAG_SIZE 1
2018 #define PCI_VPD_INFO_FLD_HDR_SIZE 3
2020 #define PCI_VPD_RO_KEYWORD_PARTNO "PN"
2021 #define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
2022 #define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
2023 #define PCI_VPD_RO_KEYWORD_CHKSUM "RV"
2026 * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length
2027 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
2029 * Returns the extracted Large Resource Data Type length.
2031 static inline u16 pci_vpd_lrdt_size(const u8 *lrdt)
2033 return (u16)lrdt[1] + ((u16)lrdt[2] << 8);
2037 * pci_vpd_lrdt_tag - Extracts the Large Resource Data Type Tag Item
2038 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
2040 * Returns the extracted Large Resource Data Type Tag item.
2042 static inline u16 pci_vpd_lrdt_tag(const u8 *lrdt)
2044 return (u16)(lrdt[0] & PCI_VPD_LRDT_TIN_MASK);
2048 * pci_vpd_srdt_size - Extracts the Small Resource Data Type length
2049 * @lrdt: Pointer to the beginning of the Small Resource Data Type tag
2051 * Returns the extracted Small Resource Data Type length.
2053 static inline u8 pci_vpd_srdt_size(const u8 *srdt)
2055 return (*srdt) & PCI_VPD_SRDT_LEN_MASK;
2059 * pci_vpd_srdt_tag - Extracts the Small Resource Data Type Tag Item
2060 * @lrdt: Pointer to the beginning of the Small Resource Data Type tag
2062 * Returns the extracted Small Resource Data Type Tag Item.
2064 static inline u8 pci_vpd_srdt_tag(const u8 *srdt)
2066 return ((*srdt) & PCI_VPD_SRDT_TIN_MASK) >> 3;
2070 * pci_vpd_info_field_size - Extracts the information field length
2071 * @lrdt: Pointer to the beginning of an information field header
2073 * Returns the extracted information field length.
2075 static inline u8 pci_vpd_info_field_size(const u8 *info_field)
2077 return info_field[2];
2081 * pci_vpd_find_tag - Locates the Resource Data Type tag provided
2082 * @buf: Pointer to buffered vpd data
2083 * @off: The offset into the buffer at which to begin the search
2084 * @len: The length of the vpd buffer
2085 * @rdt: The Resource Data Type to search for
2087 * Returns the index where the Resource Data Type was found or
2088 * -ENOENT otherwise.
2090 int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt);
2093 * pci_vpd_find_info_keyword - Locates an information field keyword in the VPD
2094 * @buf: Pointer to buffered vpd data
2095 * @off: The offset into the buffer at which to begin the search
2096 * @len: The length of the buffer area, relative to off, in which to search
2097 * @kw: The keyword to search for
2099 * Returns the index where the information field keyword was found or
2100 * -ENOENT otherwise.
2102 int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
2103 unsigned int len, const char *kw);
2105 /* PCI <-> OF binding helpers */
2109 void pci_set_of_node(struct pci_dev *dev);
2110 void pci_release_of_node(struct pci_dev *dev);
2111 void pci_set_bus_of_node(struct pci_bus *bus);
2112 void pci_release_bus_of_node(struct pci_bus *bus);
2113 struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus);
2115 /* Arch may override this (weak) */
2116 struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus);
2118 static inline struct device_node *
2119 pci_device_to_OF_node(const struct pci_dev *pdev)
2121 return pdev ? pdev->dev.of_node : NULL;
2124 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
2126 return bus ? bus->dev.of_node : NULL;
2129 #else /* CONFIG_OF */
2130 static inline void pci_set_of_node(struct pci_dev *dev) { }
2131 static inline void pci_release_of_node(struct pci_dev *dev) { }
2132 static inline void pci_set_bus_of_node(struct pci_bus *bus) { }
2133 static inline void pci_release_bus_of_node(struct pci_bus *bus) { }
2134 static inline struct device_node *
2135 pci_device_to_OF_node(const struct pci_dev *pdev) { return NULL; }
2136 static inline struct irq_domain *
2137 pci_host_bridge_of_msi_domain(struct pci_bus *bus) { return NULL; }
2138 #endif /* CONFIG_OF */
2141 struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus);
2144 pci_msi_register_fwnode_provider(struct fwnode_handle *(*fn)(struct device *));
2146 static inline struct irq_domain *
2147 pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) { return NULL; }
2151 static inline struct eeh_dev *pci_dev_to_eeh_dev(struct pci_dev *pdev)
2153 return pdev->dev.archdata.edev;
2157 void pci_add_dma_alias(struct pci_dev *dev, u8 devfn);
2158 bool pci_devs_are_dma_aliases(struct pci_dev *dev1, struct pci_dev *dev2);
2159 int pci_for_each_dma_alias(struct pci_dev *pdev,
2160 int (*fn)(struct pci_dev *pdev,
2161 u16 alias, void *data), void *data);
2163 /* helper functions for operation of device flag */
2164 static inline void pci_set_dev_assigned(struct pci_dev *pdev)
2166 pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED;
2168 static inline void pci_clear_dev_assigned(struct pci_dev *pdev)
2170 pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
2172 static inline bool pci_is_dev_assigned(struct pci_dev *pdev)
2174 return (pdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED) == PCI_DEV_FLAGS_ASSIGNED;
2178 * pci_ari_enabled - query ARI forwarding status
2181 * Returns true if ARI forwarding is enabled.
2183 static inline bool pci_ari_enabled(struct pci_bus *bus)
2185 return bus->self && bus->self->ari_enabled;
2189 * pci_is_thunderbolt_attached - whether device is on a Thunderbolt daisy chain
2190 * @pdev: PCI device to check
2192 * Walk upwards from @pdev and check for each encountered bridge if it's part
2193 * of a Thunderbolt controller. Reaching the host bridge means @pdev is not
2194 * Thunderbolt-attached. (But rather soldered to the mainboard usually.)
2196 static inline bool pci_is_thunderbolt_attached(struct pci_dev *pdev)
2198 struct pci_dev *parent = pdev;
2200 if (pdev->is_thunderbolt)
2203 while ((parent = pci_upstream_bridge(parent)))
2204 if (parent->is_thunderbolt)
2210 /* provide the legacy pci_dma_* API */
2211 #include <linux/pci-dma-compat.h>
2213 #endif /* LINUX_PCI_H */