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>
32 #include <linux/resource_ext.h>
33 #include <uapi/linux/pci.h>
35 #include <linux/pci_ids.h>
38 * The PCI interface treats multi-function devices as independent
39 * devices. The slot/function address of each device is encoded
40 * in a single byte as follows:
45 * PCI_DEVFN(), PCI_SLOT(), and PCI_FUNC() are defined in uapi/linux/pci.h.
46 * In the interest of not exposing interfaces to user-space unnecessarily,
47 * the following kernel-only defines are being added here.
49 #define PCI_DEVID(bus, devfn) ((((u16)(bus)) << 8) | (devfn))
50 /* return bus from PCI devid = ((u16)bus_number) << 8) | devfn */
51 #define PCI_BUS_NUM(x) (((x) >> 8) & 0xff)
53 /* pci_slot represents a physical slot */
55 struct pci_bus *bus; /* The bus this slot is on */
56 struct list_head list; /* node in list of slots on this bus */
57 struct hotplug_slot *hotplug; /* Hotplug info (migrate over time) */
58 unsigned char number; /* PCI_SLOT(pci_dev->devfn) */
62 static inline const char *pci_slot_name(const struct pci_slot *slot)
64 return kobject_name(&slot->kobj);
67 /* File state for mmap()s on /proc/bus/pci/X/Y */
73 /* This defines the direction arg to the DMA mapping routines. */
74 #define PCI_DMA_BIDIRECTIONAL 0
75 #define PCI_DMA_TODEVICE 1
76 #define PCI_DMA_FROMDEVICE 2
77 #define PCI_DMA_NONE 3
80 * For PCI devices, the region numbers are assigned this way:
83 /* #0-5: standard PCI resources */
85 PCI_STD_RESOURCE_END = 5,
87 /* #6: expansion ROM resource */
90 /* device specific resources */
93 PCI_IOV_RESOURCE_END = PCI_IOV_RESOURCES + PCI_SRIOV_NUM_BARS - 1,
96 /* resources assigned to buses behind the bridge */
97 #define PCI_BRIDGE_RESOURCE_NUM 4
100 PCI_BRIDGE_RESOURCE_END = PCI_BRIDGE_RESOURCES +
101 PCI_BRIDGE_RESOURCE_NUM - 1,
103 /* total resources associated with a PCI device */
106 /* preserve this for compatibility */
107 DEVICE_COUNT_RESOURCE = PCI_NUM_RESOURCES,
110 typedef int __bitwise pci_power_t;
112 #define PCI_D0 ((pci_power_t __force) 0)
113 #define PCI_D1 ((pci_power_t __force) 1)
114 #define PCI_D2 ((pci_power_t __force) 2)
115 #define PCI_D3hot ((pci_power_t __force) 3)
116 #define PCI_D3cold ((pci_power_t __force) 4)
117 #define PCI_UNKNOWN ((pci_power_t __force) 5)
118 #define PCI_POWER_ERROR ((pci_power_t __force) -1)
120 /* Remember to update this when the list above changes! */
121 extern const char *pci_power_names[];
123 static inline const char *pci_power_name(pci_power_t state)
125 return pci_power_names[1 + (int) state];
128 #define PCI_PM_D2_DELAY 200
129 #define PCI_PM_D3_WAIT 10
130 #define PCI_PM_D3COLD_WAIT 100
131 #define PCI_PM_BUS_WAIT 50
133 /** The pci_channel state describes connectivity between the CPU and
134 * the pci device. If some PCI bus between here and the pci device
135 * has crashed or locked up, this info is reflected here.
137 typedef unsigned int __bitwise pci_channel_state_t;
139 enum pci_channel_state {
140 /* I/O channel is in normal state */
141 pci_channel_io_normal = (__force pci_channel_state_t) 1,
143 /* I/O to channel is blocked */
144 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
146 /* PCI card is dead */
147 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
150 typedef unsigned int __bitwise pcie_reset_state_t;
152 enum pcie_reset_state {
153 /* Reset is NOT asserted (Use to deassert reset) */
154 pcie_deassert_reset = (__force pcie_reset_state_t) 1,
156 /* Use #PERST to reset PCIe device */
157 pcie_warm_reset = (__force pcie_reset_state_t) 2,
159 /* Use PCIe Hot Reset to reset device */
160 pcie_hot_reset = (__force pcie_reset_state_t) 3
163 typedef unsigned short __bitwise pci_dev_flags_t;
165 /* INTX_DISABLE in PCI_COMMAND register disables MSI
168 PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) (1 << 0),
169 /* Device configuration is irrevocably lost if disabled into D3 */
170 PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) (1 << 1),
171 /* Provide indication device is assigned by a Virtual Machine Manager */
172 PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) (1 << 2),
173 /* Flag for quirk use to store if quirk-specific ACS is enabled */
174 PCI_DEV_FLAGS_ACS_ENABLED_QUIRK = (__force pci_dev_flags_t) (1 << 3),
175 /* Flag to indicate the device uses dma_alias_devfn */
176 PCI_DEV_FLAGS_DMA_ALIAS_DEVFN = (__force pci_dev_flags_t) (1 << 4),
177 /* Use a PCIe-to-PCI bridge alias even if !pci_is_pcie */
178 PCI_DEV_FLAG_PCIE_BRIDGE_ALIAS = (__force pci_dev_flags_t) (1 << 5),
179 /* Do not use bus resets for device */
180 PCI_DEV_FLAGS_NO_BUS_RESET = (__force pci_dev_flags_t) (1 << 6),
181 /* Do not use PM reset even if device advertises NoSoftRst- */
182 PCI_DEV_FLAGS_NO_PM_RESET = (__force pci_dev_flags_t) (1 << 7),
185 enum pci_irq_reroute_variant {
186 INTEL_IRQ_REROUTE_VARIANT = 1,
187 MAX_IRQ_REROUTE_VARIANTS = 3
190 typedef unsigned short __bitwise pci_bus_flags_t;
192 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
193 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
196 /* These values come from the PCI Express Spec */
197 enum pcie_link_width {
198 PCIE_LNK_WIDTH_RESRV = 0x00,
206 PCIE_LNK_WIDTH_UNKNOWN = 0xFF,
209 /* Based on the PCI Hotplug Spec, but some values are made up by us */
211 PCI_SPEED_33MHz = 0x00,
212 PCI_SPEED_66MHz = 0x01,
213 PCI_SPEED_66MHz_PCIX = 0x02,
214 PCI_SPEED_100MHz_PCIX = 0x03,
215 PCI_SPEED_133MHz_PCIX = 0x04,
216 PCI_SPEED_66MHz_PCIX_ECC = 0x05,
217 PCI_SPEED_100MHz_PCIX_ECC = 0x06,
218 PCI_SPEED_133MHz_PCIX_ECC = 0x07,
219 PCI_SPEED_66MHz_PCIX_266 = 0x09,
220 PCI_SPEED_100MHz_PCIX_266 = 0x0a,
221 PCI_SPEED_133MHz_PCIX_266 = 0x0b,
227 PCI_SPEED_66MHz_PCIX_533 = 0x11,
228 PCI_SPEED_100MHz_PCIX_533 = 0x12,
229 PCI_SPEED_133MHz_PCIX_533 = 0x13,
230 PCIE_SPEED_2_5GT = 0x14,
231 PCIE_SPEED_5_0GT = 0x15,
232 PCIE_SPEED_8_0GT = 0x16,
233 PCI_SPEED_UNKNOWN = 0xff,
236 struct pci_cap_saved_data {
243 struct pci_cap_saved_state {
244 struct hlist_node next;
245 struct pci_cap_saved_data cap;
248 struct pcie_link_state;
254 * The pci_dev structure is used to describe PCI devices.
257 struct list_head bus_list; /* node in per-bus list */
258 struct pci_bus *bus; /* bus this device is on */
259 struct pci_bus *subordinate; /* bus this device bridges to */
261 void *sysdata; /* hook for sys-specific extension */
262 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
263 struct pci_slot *slot; /* Physical slot this device is in */
265 unsigned int devfn; /* encoded device & function index */
266 unsigned short vendor;
267 unsigned short device;
268 unsigned short subsystem_vendor;
269 unsigned short subsystem_device;
270 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
271 u8 revision; /* PCI revision, low byte of class word */
272 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
273 u8 pcie_cap; /* PCIe capability offset */
274 u8 msi_cap; /* MSI capability offset */
275 u8 msix_cap; /* MSI-X capability offset */
276 u8 pcie_mpss:3; /* PCIe Max Payload Size Supported */
277 u8 rom_base_reg; /* which config register controls the ROM */
278 u8 pin; /* which interrupt pin this device uses */
279 u16 pcie_flags_reg; /* cached PCIe Capabilities Register */
280 u8 dma_alias_devfn;/* devfn of DMA alias, if any */
282 struct pci_driver *driver; /* which driver has allocated this device */
283 u64 dma_mask; /* Mask of the bits of bus address this
284 device implements. Normally this is
285 0xffffffff. You only need to change
286 this if your device has broken DMA
287 or supports 64-bit transfers. */
289 struct device_dma_parameters dma_parms;
291 pci_power_t current_state; /* Current operating state. In ACPI-speak,
292 this is D0-D3, D0 being fully functional,
294 u8 pm_cap; /* PM capability offset */
295 unsigned int pme_support:5; /* Bitmask of states from which PME#
297 unsigned int pme_interrupt:1;
298 unsigned int pme_poll:1; /* Poll device's PME status bit */
299 unsigned int d1_support:1; /* Low power state D1 is supported */
300 unsigned int d2_support:1; /* Low power state D2 is supported */
301 unsigned int no_d1d2:1; /* D1 and D2 are forbidden */
302 unsigned int no_d3cold:1; /* D3cold is forbidden */
303 unsigned int d3cold_allowed:1; /* D3cold is allowed by user */
304 unsigned int mmio_always_on:1; /* disallow turning off io/mem
305 decoding during bar sizing */
306 unsigned int wakeup_prepared:1;
307 unsigned int runtime_d3cold:1; /* whether go through runtime
308 D3cold, not set for devices
309 powered on/off by the
310 corresponding bridge */
311 unsigned int ignore_hotplug:1; /* Ignore hotplug events */
312 unsigned int d3_delay; /* D3->D0 transition time in ms */
313 unsigned int d3cold_delay; /* D3cold->D0 transition time in ms */
315 #ifdef CONFIG_PCIEASPM
316 struct pcie_link_state *link_state; /* ASPM link state */
319 pci_channel_state_t error_state; /* current connectivity state */
320 struct device dev; /* Generic device interface */
322 int cfg_size; /* Size of configuration space */
325 * Instead of touching interrupt line and base address registers
326 * directly, use the values stored here. They might be different!
329 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
331 bool match_driver; /* Skip attaching driver */
332 /* These fields are used by common fixups */
333 unsigned int transparent:1; /* Subtractive decode PCI bridge */
334 unsigned int multifunction:1;/* Part of multi-function device */
335 /* keep track of device state */
336 unsigned int is_added:1;
337 unsigned int is_busmaster:1; /* device is busmaster */
338 unsigned int no_msi:1; /* device may not use msi */
339 unsigned int no_64bit_msi:1; /* device may only use 32-bit MSIs */
340 unsigned int block_cfg_access:1; /* config space access is blocked */
341 unsigned int broken_parity_status:1; /* Device generates false positive parity */
342 unsigned int irq_reroute_variant:2; /* device needs IRQ rerouting variant */
343 unsigned int msi_enabled:1;
344 unsigned int msix_enabled:1;
345 unsigned int ari_enabled:1; /* ARI forwarding */
346 unsigned int is_managed:1;
347 unsigned int needs_freset:1; /* Dev requires fundamental reset */
348 unsigned int state_saved:1;
349 unsigned int is_physfn:1;
350 unsigned int is_virtfn:1;
351 unsigned int reset_fn:1;
352 unsigned int is_hotplug_bridge:1;
353 unsigned int __aer_firmware_first_valid:1;
354 unsigned int __aer_firmware_first:1;
355 unsigned int broken_intx_masking:1;
356 unsigned int io_window_1k:1; /* Intel P2P bridge 1K I/O windows */
357 unsigned int irq_managed:1;
358 pci_dev_flags_t dev_flags;
359 atomic_t enable_cnt; /* pci_enable_device has been called */
361 u32 saved_config_space[16]; /* config space saved at suspend time */
362 struct hlist_head saved_cap_space;
363 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
364 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
365 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
366 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
367 #ifdef CONFIG_PCI_MSI
368 struct list_head msi_list;
369 const struct attribute_group **msi_irq_groups;
372 #ifdef CONFIG_PCI_ATS
374 struct pci_sriov *sriov; /* SR-IOV capability related */
375 struct pci_dev *physfn; /* the PF this VF is associated with */
377 struct pci_ats *ats; /* Address Translation Service */
379 phys_addr_t rom; /* Physical address of ROM if it's not from the BAR */
380 size_t romlen; /* Length of ROM if it's not from the BAR */
381 char *driver_override; /* Driver name to force a match */
384 static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
386 #ifdef CONFIG_PCI_IOV
393 struct pci_dev *pci_alloc_dev(struct pci_bus *bus);
395 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
396 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
398 static inline int pci_channel_offline(struct pci_dev *pdev)
400 return (pdev->error_state != pci_channel_io_normal);
403 struct pci_host_bridge {
405 struct pci_bus *bus; /* root bus */
406 struct list_head windows; /* resource_entry */
407 void (*release_fn)(struct pci_host_bridge *);
411 #define to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev)
412 void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
413 void (*release_fn)(struct pci_host_bridge *),
416 int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge);
419 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
420 * to P2P or CardBus bridge windows) go in a table. Additional ones (for
421 * buses below host bridges or subtractive decode bridges) go in the list.
422 * Use pci_bus_for_each_resource() to iterate through all the resources.
426 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly
427 * and there's no way to program the bridge with the details of the window.
428 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive-
429 * decode bit set, because they are explicit and can be programmed with _SRS.
431 #define PCI_SUBTRACTIVE_DECODE 0x1
433 struct pci_bus_resource {
434 struct list_head list;
435 struct resource *res;
439 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
442 struct list_head node; /* node in list of buses */
443 struct pci_bus *parent; /* parent bus this bridge is on */
444 struct list_head children; /* list of child buses */
445 struct list_head devices; /* list of devices on this bus */
446 struct pci_dev *self; /* bridge device as seen by parent */
447 struct list_head slots; /* list of slots on this bus */
448 struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
449 struct list_head resources; /* address space routed to this bus */
450 struct resource busn_res; /* bus numbers routed to this bus */
452 struct pci_ops *ops; /* configuration access functions */
453 struct msi_controller *msi; /* MSI controller */
454 void *sysdata; /* hook for sys-specific extension */
455 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
457 unsigned char number; /* bus number */
458 unsigned char primary; /* number of primary bridge */
459 unsigned char max_bus_speed; /* enum pci_bus_speed */
460 unsigned char cur_bus_speed; /* enum pci_bus_speed */
461 #ifdef CONFIG_PCI_DOMAINS_GENERIC
467 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
468 pci_bus_flags_t bus_flags; /* inherited by child buses */
469 struct device *bridge;
471 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
472 struct bin_attribute *legacy_mem; /* legacy mem */
473 unsigned int is_added:1;
476 #define to_pci_bus(n) container_of(n, struct pci_bus, dev)
479 * Returns true if the PCI bus is root (behind host-PCI bridge),
482 * Some code assumes that "bus->self == NULL" means that bus is a root bus.
483 * This is incorrect because "virtual" buses added for SR-IOV (via
484 * virtfn_add_bus()) have "bus->self == NULL" but are not root buses.
486 static inline bool pci_is_root_bus(struct pci_bus *pbus)
488 return !(pbus->parent);
492 * pci_is_bridge - check if the PCI device is a bridge
495 * Return true if the PCI device is bridge whether it has subordinate
498 static inline bool pci_is_bridge(struct pci_dev *dev)
500 return dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
501 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS;
504 static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev)
506 dev = pci_physfn(dev);
507 if (pci_is_root_bus(dev->bus))
510 return dev->bus->self;
513 struct device *pci_get_host_bridge_device(struct pci_dev *dev);
514 void pci_put_host_bridge_device(struct device *dev);
516 #ifdef CONFIG_PCI_MSI
517 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
519 return pci_dev->msi_enabled || pci_dev->msix_enabled;
522 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
526 * Error values that may be returned by PCI functions.
528 #define PCIBIOS_SUCCESSFUL 0x00
529 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
530 #define PCIBIOS_BAD_VENDOR_ID 0x83
531 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
532 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
533 #define PCIBIOS_SET_FAILED 0x88
534 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
537 * Translate above to generic errno for passing back through non-PCI code.
539 static inline int pcibios_err_to_errno(int err)
541 if (err <= PCIBIOS_SUCCESSFUL)
542 return err; /* Assume already errno */
545 case PCIBIOS_FUNC_NOT_SUPPORTED:
547 case PCIBIOS_BAD_VENDOR_ID:
549 case PCIBIOS_DEVICE_NOT_FOUND:
551 case PCIBIOS_BAD_REGISTER_NUMBER:
553 case PCIBIOS_SET_FAILED:
555 case PCIBIOS_BUFFER_TOO_SMALL:
562 /* Low-level architecture-dependent routines */
565 void __iomem *(*map_bus)(struct pci_bus *bus, unsigned int devfn, int where);
566 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
567 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
571 * ACPI needs to be able to access PCI config space before we've done a
572 * PCI bus scan and created pci_bus structures.
574 int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
575 int reg, int len, u32 *val);
576 int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
577 int reg, int len, u32 val);
579 struct pci_bus_region {
585 spinlock_t lock; /* protects list, index */
586 struct list_head list; /* for IDs added at runtime */
591 * PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
592 * a set of callbacks in struct pci_error_handlers, that device driver
593 * will be notified of PCI bus errors, and will be driven to recovery
594 * when an error occurs.
597 typedef unsigned int __bitwise pci_ers_result_t;
599 enum pci_ers_result {
600 /* no result/none/not supported in device driver */
601 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
603 /* Device driver can recover without slot reset */
604 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
606 /* Device driver wants slot to be reset. */
607 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
609 /* Device has completely failed, is unrecoverable */
610 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
612 /* Device driver is fully recovered and operational */
613 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
615 /* No AER capabilities registered for the driver */
616 PCI_ERS_RESULT_NO_AER_DRIVER = (__force pci_ers_result_t) 6,
619 /* PCI bus error event callbacks */
620 struct pci_error_handlers {
621 /* PCI bus error detected on this device */
622 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
623 enum pci_channel_state error);
625 /* MMIO has been re-enabled, but not DMA */
626 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
628 /* PCI Express link has been reset */
629 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
631 /* PCI slot has been reset */
632 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
634 /* PCI function reset prepare or completed */
635 void (*reset_notify)(struct pci_dev *dev, bool prepare);
637 /* Device driver may resume normal operations */
638 void (*resume)(struct pci_dev *dev);
644 struct list_head node;
646 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
647 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
648 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
649 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
650 int (*suspend_late) (struct pci_dev *dev, pm_message_t state);
651 int (*resume_early) (struct pci_dev *dev);
652 int (*resume) (struct pci_dev *dev); /* Device woken up */
653 void (*shutdown) (struct pci_dev *dev);
654 int (*sriov_configure) (struct pci_dev *dev, int num_vfs); /* PF pdev */
655 const struct pci_error_handlers *err_handler;
656 struct device_driver driver;
657 struct pci_dynids dynids;
660 #define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
663 * DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table
664 * @_table: device table name
666 * This macro is deprecated and should not be used in new code.
668 #define DEFINE_PCI_DEVICE_TABLE(_table) \
669 const struct pci_device_id _table[]
672 * PCI_DEVICE - macro used to describe a specific pci device
673 * @vend: the 16 bit PCI Vendor ID
674 * @dev: the 16 bit PCI Device ID
676 * This macro is used to create a struct pci_device_id that matches a
677 * specific device. The subvendor and subdevice fields will be set to
680 #define PCI_DEVICE(vend,dev) \
681 .vendor = (vend), .device = (dev), \
682 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
685 * PCI_DEVICE_SUB - macro used to describe a specific pci device with subsystem
686 * @vend: the 16 bit PCI Vendor ID
687 * @dev: the 16 bit PCI Device ID
688 * @subvend: the 16 bit PCI Subvendor ID
689 * @subdev: the 16 bit PCI Subdevice ID
691 * This macro is used to create a struct pci_device_id that matches a
692 * specific device with subsystem information.
694 #define PCI_DEVICE_SUB(vend, dev, subvend, subdev) \
695 .vendor = (vend), .device = (dev), \
696 .subvendor = (subvend), .subdevice = (subdev)
699 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
700 * @dev_class: the class, subclass, prog-if triple for this device
701 * @dev_class_mask: the class mask for this device
703 * This macro is used to create a struct pci_device_id that matches a
704 * specific PCI class. The vendor, device, subvendor, and subdevice
705 * fields will be set to PCI_ANY_ID.
707 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
708 .class = (dev_class), .class_mask = (dev_class_mask), \
709 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
710 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
713 * PCI_VDEVICE - macro used to describe a specific pci device in short form
714 * @vend: the vendor name
715 * @dev: the 16 bit PCI Device ID
717 * This macro is used to create a struct pci_device_id that matches a
718 * specific PCI device. The subvendor, and subdevice fields will be set
719 * to PCI_ANY_ID. The macro allows the next field to follow as the device
723 #define PCI_VDEVICE(vend, dev) \
724 .vendor = PCI_VENDOR_ID_##vend, .device = (dev), \
725 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0
727 /* these external functions are only available when PCI support is enabled */
730 void pcie_bus_configure_settings(struct pci_bus *bus);
732 enum pcie_bus_config_types {
735 PCIE_BUS_PERFORMANCE,
739 extern enum pcie_bus_config_types pcie_bus_config;
741 extern struct bus_type pci_bus_type;
743 /* Do NOT directly access these two variables, unless you are arch-specific PCI
744 * code, or PCI core code. */
745 extern struct list_head pci_root_buses; /* list of all known PCI buses */
746 /* Some device drivers need know if PCI is initiated */
747 int no_pci_devices(void);
749 void pcibios_resource_survey_bus(struct pci_bus *bus);
750 void pcibios_add_bus(struct pci_bus *bus);
751 void pcibios_remove_bus(struct pci_bus *bus);
752 void pcibios_fixup_bus(struct pci_bus *);
753 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
754 /* Architecture-specific versions may override this (weak) */
755 char *pcibios_setup(char *str);
757 /* Used only when drivers/pci/setup.c is used */
758 resource_size_t pcibios_align_resource(void *, const struct resource *,
761 void pcibios_update_irq(struct pci_dev *, int irq);
763 /* Weak but can be overriden by arch */
764 void pci_fixup_cardbus(struct pci_bus *);
766 /* Generic PCI functions used internally */
768 void pcibios_resource_to_bus(struct pci_bus *bus, struct pci_bus_region *region,
769 struct resource *res);
770 void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
771 struct pci_bus_region *region);
772 void pcibios_scan_specific_bus(int busn);
773 struct pci_bus *pci_find_bus(int domain, int busnr);
774 void pci_bus_add_devices(const struct pci_bus *bus);
775 struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
776 struct pci_ops *ops, void *sysdata);
777 struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
778 struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
779 struct pci_ops *ops, void *sysdata,
780 struct list_head *resources);
781 int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
782 int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax);
783 void pci_bus_release_busn_res(struct pci_bus *b);
784 struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
785 struct pci_ops *ops, void *sysdata,
786 struct list_head *resources);
787 struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
789 void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
790 struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
792 struct hotplug_slot *hotplug);
793 void pci_destroy_slot(struct pci_slot *slot);
794 int pci_scan_slot(struct pci_bus *bus, int devfn);
795 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
796 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
797 unsigned int pci_scan_child_bus(struct pci_bus *bus);
798 void pci_bus_add_device(struct pci_dev *dev);
799 void pci_read_bridge_bases(struct pci_bus *child);
800 struct resource *pci_find_parent_resource(const struct pci_dev *dev,
801 struct resource *res);
802 u8 pci_swizzle_interrupt_pin(const struct pci_dev *dev, u8 pin);
803 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
804 u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
805 struct pci_dev *pci_dev_get(struct pci_dev *dev);
806 void pci_dev_put(struct pci_dev *dev);
807 void pci_remove_bus(struct pci_bus *b);
808 void pci_stop_and_remove_bus_device(struct pci_dev *dev);
809 void pci_stop_and_remove_bus_device_locked(struct pci_dev *dev);
810 void pci_stop_root_bus(struct pci_bus *bus);
811 void pci_remove_root_bus(struct pci_bus *bus);
812 void pci_setup_cardbus(struct pci_bus *bus);
813 void pci_sort_breadthfirst(void);
814 #define dev_is_pci(d) ((d)->bus == &pci_bus_type)
815 #define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false))
816 #define dev_num_vf(d) ((dev_is_pci(d) ? pci_num_vf(to_pci_dev(d)) : 0))
818 /* Generic PCI functions exported to card drivers */
820 enum pci_lost_interrupt_reason {
821 PCI_LOST_IRQ_NO_INFORMATION = 0,
822 PCI_LOST_IRQ_DISABLE_MSI,
823 PCI_LOST_IRQ_DISABLE_MSIX,
824 PCI_LOST_IRQ_DISABLE_ACPI,
826 enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *dev);
827 int pci_find_capability(struct pci_dev *dev, int cap);
828 int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
829 int pci_find_ext_capability(struct pci_dev *dev, int cap);
830 int pci_find_next_ext_capability(struct pci_dev *dev, int pos, int cap);
831 int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
832 int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
833 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
835 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
836 struct pci_dev *from);
837 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
838 unsigned int ss_vendor, unsigned int ss_device,
839 struct pci_dev *from);
840 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
841 struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
843 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
846 return pci_get_domain_bus_and_slot(0, bus, devfn);
848 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
849 int pci_dev_present(const struct pci_device_id *ids);
851 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
853 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
854 int where, u16 *val);
855 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
856 int where, u32 *val);
857 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
859 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
861 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
864 int pci_generic_config_read(struct pci_bus *bus, unsigned int devfn,
865 int where, int size, u32 *val);
866 int pci_generic_config_write(struct pci_bus *bus, unsigned int devfn,
867 int where, int size, u32 val);
868 int pci_generic_config_read32(struct pci_bus *bus, unsigned int devfn,
869 int where, int size, u32 *val);
870 int pci_generic_config_write32(struct pci_bus *bus, unsigned int devfn,
871 int where, int size, u32 val);
873 struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
875 static inline int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val)
877 return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
879 static inline int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val)
881 return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
883 static inline int pci_read_config_dword(const struct pci_dev *dev, int where,
886 return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
888 static inline int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val)
890 return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
892 static inline int pci_write_config_word(const struct pci_dev *dev, int where, u16 val)
894 return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
896 static inline int pci_write_config_dword(const struct pci_dev *dev, int where,
899 return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
902 int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val);
903 int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val);
904 int pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val);
905 int pcie_capability_write_dword(struct pci_dev *dev, int pos, u32 val);
906 int pcie_capability_clear_and_set_word(struct pci_dev *dev, int pos,
908 int pcie_capability_clear_and_set_dword(struct pci_dev *dev, int pos,
911 static inline int pcie_capability_set_word(struct pci_dev *dev, int pos,
914 return pcie_capability_clear_and_set_word(dev, pos, 0, set);
917 static inline int pcie_capability_set_dword(struct pci_dev *dev, int pos,
920 return pcie_capability_clear_and_set_dword(dev, pos, 0, set);
923 static inline int pcie_capability_clear_word(struct pci_dev *dev, int pos,
926 return pcie_capability_clear_and_set_word(dev, pos, clear, 0);
929 static inline int pcie_capability_clear_dword(struct pci_dev *dev, int pos,
932 return pcie_capability_clear_and_set_dword(dev, pos, clear, 0);
935 /* user-space driven config access */
936 int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
937 int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
938 int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val);
939 int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val);
940 int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val);
941 int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val);
943 int __must_check pci_enable_device(struct pci_dev *dev);
944 int __must_check pci_enable_device_io(struct pci_dev *dev);
945 int __must_check pci_enable_device_mem(struct pci_dev *dev);
946 int __must_check pci_reenable_device(struct pci_dev *);
947 int __must_check pcim_enable_device(struct pci_dev *pdev);
948 void pcim_pin_device(struct pci_dev *pdev);
950 static inline int pci_is_enabled(struct pci_dev *pdev)
952 return (atomic_read(&pdev->enable_cnt) > 0);
955 static inline int pci_is_managed(struct pci_dev *pdev)
957 return pdev->is_managed;
960 void pci_disable_device(struct pci_dev *dev);
962 extern unsigned int pcibios_max_latency;
963 void pci_set_master(struct pci_dev *dev);
964 void pci_clear_master(struct pci_dev *dev);
966 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
967 int pci_set_cacheline_size(struct pci_dev *dev);
968 #define HAVE_PCI_SET_MWI
969 int __must_check pci_set_mwi(struct pci_dev *dev);
970 int pci_try_set_mwi(struct pci_dev *dev);
971 void pci_clear_mwi(struct pci_dev *dev);
972 void pci_intx(struct pci_dev *dev, int enable);
973 bool pci_intx_mask_supported(struct pci_dev *dev);
974 bool pci_check_and_mask_intx(struct pci_dev *dev);
975 bool pci_check_and_unmask_intx(struct pci_dev *dev);
976 void pci_msi_off(struct pci_dev *dev);
977 int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size);
978 int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask);
979 int pci_wait_for_pending(struct pci_dev *dev, int pos, u16 mask);
980 int pci_wait_for_pending_transaction(struct pci_dev *dev);
981 int pcix_get_max_mmrbc(struct pci_dev *dev);
982 int pcix_get_mmrbc(struct pci_dev *dev);
983 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
984 int pcie_get_readrq(struct pci_dev *dev);
985 int pcie_set_readrq(struct pci_dev *dev, int rq);
986 int pcie_get_mps(struct pci_dev *dev);
987 int pcie_set_mps(struct pci_dev *dev, int mps);
988 int pcie_get_minimum_link(struct pci_dev *dev, enum pci_bus_speed *speed,
989 enum pcie_link_width *width);
990 int __pci_reset_function(struct pci_dev *dev);
991 int __pci_reset_function_locked(struct pci_dev *dev);
992 int pci_reset_function(struct pci_dev *dev);
993 int pci_try_reset_function(struct pci_dev *dev);
994 int pci_probe_reset_slot(struct pci_slot *slot);
995 int pci_reset_slot(struct pci_slot *slot);
996 int pci_try_reset_slot(struct pci_slot *slot);
997 int pci_probe_reset_bus(struct pci_bus *bus);
998 int pci_reset_bus(struct pci_bus *bus);
999 int pci_try_reset_bus(struct pci_bus *bus);
1000 void pci_reset_secondary_bus(struct pci_dev *dev);
1001 void pcibios_reset_secondary_bus(struct pci_dev *dev);
1002 void pci_reset_bridge_secondary_bus(struct pci_dev *dev);
1003 void pci_update_resource(struct pci_dev *dev, int resno);
1004 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
1005 int __must_check pci_reassign_resource(struct pci_dev *dev, int i, resource_size_t add_size, resource_size_t align);
1006 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
1007 bool pci_device_is_present(struct pci_dev *pdev);
1009 /* ROM control related routines */
1010 int pci_enable_rom(struct pci_dev *pdev);
1011 void pci_disable_rom(struct pci_dev *pdev);
1012 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
1013 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
1014 size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size);
1015 void __iomem __must_check *pci_platform_rom(struct pci_dev *pdev, size_t *size);
1017 /* Power management related routines */
1018 int pci_save_state(struct pci_dev *dev);
1019 void pci_restore_state(struct pci_dev *dev);
1020 struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev);
1021 int pci_load_saved_state(struct pci_dev *dev,
1022 struct pci_saved_state *state);
1023 int pci_load_and_free_saved_state(struct pci_dev *dev,
1024 struct pci_saved_state **state);
1025 struct pci_cap_saved_state *pci_find_saved_cap(struct pci_dev *dev, char cap);
1026 struct pci_cap_saved_state *pci_find_saved_ext_cap(struct pci_dev *dev,
1028 int pci_add_cap_save_buffer(struct pci_dev *dev, char cap, unsigned int size);
1029 int pci_add_ext_cap_save_buffer(struct pci_dev *dev,
1030 u16 cap, unsigned int size);
1031 int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state);
1032 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
1033 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
1034 bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
1035 void pci_pme_active(struct pci_dev *dev, bool enable);
1036 int __pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1037 bool runtime, bool enable);
1038 int pci_wake_from_d3(struct pci_dev *dev, bool enable);
1039 int pci_prepare_to_sleep(struct pci_dev *dev);
1040 int pci_back_from_sleep(struct pci_dev *dev);
1041 bool pci_dev_run_wake(struct pci_dev *dev);
1042 bool pci_check_pme_status(struct pci_dev *dev);
1043 void pci_pme_wakeup_bus(struct pci_bus *bus);
1045 static inline void pci_ignore_hotplug(struct pci_dev *dev)
1047 dev->ignore_hotplug = 1;
1050 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1053 return __pci_enable_wake(dev, state, false, enable);
1056 /* PCI Virtual Channel */
1057 int pci_save_vc_state(struct pci_dev *dev);
1058 void pci_restore_vc_state(struct pci_dev *dev);
1059 void pci_allocate_vc_save_buffers(struct pci_dev *dev);
1061 /* For use by arch with custom probe code */
1062 void set_pcie_port_type(struct pci_dev *pdev);
1063 void set_pcie_hotplug_bridge(struct pci_dev *pdev);
1065 /* Functions for PCI Hotplug drivers to use */
1066 int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
1067 unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge);
1068 unsigned int pci_rescan_bus(struct pci_bus *bus);
1069 void pci_lock_rescan_remove(void);
1070 void pci_unlock_rescan_remove(void);
1072 /* Vital product data routines */
1073 ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
1074 ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
1076 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
1077 resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx);
1078 void pci_bus_assign_resources(const struct pci_bus *bus);
1079 void pci_bus_size_bridges(struct pci_bus *bus);
1080 int pci_claim_resource(struct pci_dev *, int);
1081 int pci_claim_bridge_resource(struct pci_dev *bridge, int i);
1082 void pci_assign_unassigned_resources(void);
1083 void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
1084 void pci_assign_unassigned_bus_resources(struct pci_bus *bus);
1085 void pci_assign_unassigned_root_bus_resources(struct pci_bus *bus);
1086 void pdev_enable_device(struct pci_dev *);
1087 int pci_enable_resources(struct pci_dev *, int mask);
1088 void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
1089 int (*)(const struct pci_dev *, u8, u8));
1090 #define HAVE_PCI_REQ_REGIONS 2
1091 int __must_check pci_request_regions(struct pci_dev *, const char *);
1092 int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
1093 void pci_release_regions(struct pci_dev *);
1094 int __must_check pci_request_region(struct pci_dev *, int, const char *);
1095 int __must_check pci_request_region_exclusive(struct pci_dev *, int, const char *);
1096 void pci_release_region(struct pci_dev *, int);
1097 int pci_request_selected_regions(struct pci_dev *, int, const char *);
1098 int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
1099 void pci_release_selected_regions(struct pci_dev *, int);
1101 /* drivers/pci/bus.c */
1102 struct pci_bus *pci_bus_get(struct pci_bus *bus);
1103 void pci_bus_put(struct pci_bus *bus);
1104 void pci_add_resource(struct list_head *resources, struct resource *res);
1105 void pci_add_resource_offset(struct list_head *resources, struct resource *res,
1106 resource_size_t offset);
1107 void pci_free_resource_list(struct list_head *resources);
1108 void pci_bus_add_resource(struct pci_bus *bus, struct resource *res, unsigned int flags);
1109 struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n);
1110 void pci_bus_remove_resources(struct pci_bus *bus);
1112 #define pci_bus_for_each_resource(bus, res, i) \
1114 (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
1117 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
1118 struct resource *res, resource_size_t size,
1119 resource_size_t align, resource_size_t min,
1120 unsigned long type_mask,
1121 resource_size_t (*alignf)(void *,
1122 const struct resource *,
1128 int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr);
1130 static inline dma_addr_t pci_bus_address(struct pci_dev *pdev, int bar)
1132 struct pci_bus_region region;
1134 pcibios_resource_to_bus(pdev->bus, ®ion, &pdev->resource[bar]);
1135 return region.start;
1138 /* Proper probing supporting hot-pluggable devices */
1139 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
1140 const char *mod_name);
1143 * pci_register_driver must be a macro so that KBUILD_MODNAME can be expanded
1145 #define pci_register_driver(driver) \
1146 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
1148 void pci_unregister_driver(struct pci_driver *dev);
1151 * module_pci_driver() - Helper macro for registering a PCI driver
1152 * @__pci_driver: pci_driver struct
1154 * Helper macro for PCI drivers which do not do anything special in module
1155 * init/exit. This eliminates a lot of boilerplate. Each module may only
1156 * use this macro once, and calling it replaces module_init() and module_exit()
1158 #define module_pci_driver(__pci_driver) \
1159 module_driver(__pci_driver, pci_register_driver, \
1160 pci_unregister_driver)
1162 struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
1163 int pci_add_dynid(struct pci_driver *drv,
1164 unsigned int vendor, unsigned int device,
1165 unsigned int subvendor, unsigned int subdevice,
1166 unsigned int class, unsigned int class_mask,
1167 unsigned long driver_data);
1168 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
1169 struct pci_dev *dev);
1170 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
1173 void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
1175 int pci_cfg_space_size(struct pci_dev *dev);
1176 unsigned char pci_bus_max_busnr(struct pci_bus *bus);
1177 void pci_setup_bridge(struct pci_bus *bus);
1178 resource_size_t pcibios_window_alignment(struct pci_bus *bus,
1179 unsigned long type);
1181 #define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
1182 #define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)
1184 int pci_set_vga_state(struct pci_dev *pdev, bool decode,
1185 unsigned int command_bits, u32 flags);
1186 /* kmem_cache style wrapper around pci_alloc_consistent() */
1188 #include <linux/pci-dma.h>
1189 #include <linux/dmapool.h>
1191 #define pci_pool dma_pool
1192 #define pci_pool_create(name, pdev, size, align, allocation) \
1193 dma_pool_create(name, &pdev->dev, size, align, allocation)
1194 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
1195 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
1196 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
1198 enum pci_dma_burst_strategy {
1199 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
1200 strategy_parameter is N/A */
1201 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
1203 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
1204 strategy_parameter byte boundaries */
1208 u32 vector; /* kernel uses to write allocated vector */
1209 u16 entry; /* driver uses to specify entry, OS writes */
1213 #ifdef CONFIG_PCI_MSI
1214 int pci_msi_vec_count(struct pci_dev *dev);
1215 void pci_msi_shutdown(struct pci_dev *dev);
1216 void pci_disable_msi(struct pci_dev *dev);
1217 int pci_msix_vec_count(struct pci_dev *dev);
1218 int pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, int nvec);
1219 void pci_msix_shutdown(struct pci_dev *dev);
1220 void pci_disable_msix(struct pci_dev *dev);
1221 void pci_restore_msi_state(struct pci_dev *dev);
1222 int pci_msi_enabled(void);
1223 int pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec);
1224 static inline int pci_enable_msi_exact(struct pci_dev *dev, int nvec)
1226 int rc = pci_enable_msi_range(dev, nvec, nvec);
1231 int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
1232 int minvec, int maxvec);
1233 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1234 struct msix_entry *entries, int nvec)
1236 int rc = pci_enable_msix_range(dev, entries, nvec, nvec);
1242 static inline int pci_msi_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1243 static inline void pci_msi_shutdown(struct pci_dev *dev) { }
1244 static inline void pci_disable_msi(struct pci_dev *dev) { }
1245 static inline int pci_msix_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1246 static inline int pci_enable_msix(struct pci_dev *dev,
1247 struct msix_entry *entries, int nvec)
1249 static inline void pci_msix_shutdown(struct pci_dev *dev) { }
1250 static inline void pci_disable_msix(struct pci_dev *dev) { }
1251 static inline void pci_restore_msi_state(struct pci_dev *dev) { }
1252 static inline int pci_msi_enabled(void) { return 0; }
1253 static inline int pci_enable_msi_range(struct pci_dev *dev, int minvec,
1256 static inline int pci_enable_msi_exact(struct pci_dev *dev, int nvec)
1258 static inline int pci_enable_msix_range(struct pci_dev *dev,
1259 struct msix_entry *entries, int minvec, int maxvec)
1261 static inline int pci_enable_msix_exact(struct pci_dev *dev,
1262 struct msix_entry *entries, int nvec)
1266 #ifdef CONFIG_PCIEPORTBUS
1267 extern bool pcie_ports_disabled;
1268 extern bool pcie_ports_auto;
1270 #define pcie_ports_disabled true
1271 #define pcie_ports_auto false
1274 #ifdef CONFIG_PCIEASPM
1275 bool pcie_aspm_support_enabled(void);
1277 static inline bool pcie_aspm_support_enabled(void) { return false; }
1280 #ifdef CONFIG_PCIEAER
1281 void pci_no_aer(void);
1282 bool pci_aer_available(void);
1284 static inline void pci_no_aer(void) { }
1285 static inline bool pci_aer_available(void) { return false; }
1288 #ifdef CONFIG_PCIE_ECRC
1289 void pcie_set_ecrc_checking(struct pci_dev *dev);
1290 void pcie_ecrc_get_policy(char *str);
1292 static inline void pcie_set_ecrc_checking(struct pci_dev *dev) { }
1293 static inline void pcie_ecrc_get_policy(char *str) { }
1296 #define pci_enable_msi(pdev) pci_enable_msi_exact(pdev, 1)
1298 #ifdef CONFIG_HT_IRQ
1299 /* The functions a driver should call */
1300 int ht_create_irq(struct pci_dev *dev, int idx);
1301 void ht_destroy_irq(unsigned int irq);
1302 #endif /* CONFIG_HT_IRQ */
1304 void pci_cfg_access_lock(struct pci_dev *dev);
1305 bool pci_cfg_access_trylock(struct pci_dev *dev);
1306 void pci_cfg_access_unlock(struct pci_dev *dev);
1309 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
1310 * a PCI domain is defined to be a set of PCI buses which share
1311 * configuration space.
1313 #ifdef CONFIG_PCI_DOMAINS
1314 extern int pci_domains_supported;
1315 int pci_get_new_domain_nr(void);
1317 enum { pci_domains_supported = 0 };
1318 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1319 static inline int pci_proc_domain(struct pci_bus *bus) { return 0; }
1320 static inline int pci_get_new_domain_nr(void) { return -ENOSYS; }
1321 #endif /* CONFIG_PCI_DOMAINS */
1324 * Generic implementation for PCI domain support. If your
1325 * architecture does not need custom management of PCI
1326 * domains then this implementation will be used
1328 #ifdef CONFIG_PCI_DOMAINS_GENERIC
1329 static inline int pci_domain_nr(struct pci_bus *bus)
1331 return bus->domain_nr;
1333 void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent);
1335 static inline void pci_bus_assign_domain_nr(struct pci_bus *bus,
1336 struct device *parent)
1341 /* some architectures require additional setup to direct VGA traffic */
1342 typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
1343 unsigned int command_bits, u32 flags);
1344 void pci_register_set_vga_state(arch_set_vga_state_t func);
1346 #else /* CONFIG_PCI is not enabled */
1349 * If the system does not have PCI, clearly these return errors. Define
1350 * these as simple inline functions to avoid hair in drivers.
1353 #define _PCI_NOP(o, s, t) \
1354 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
1356 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
1358 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
1359 _PCI_NOP(o, word, u16 x) \
1360 _PCI_NOP(o, dword, u32 x)
1361 _PCI_NOP_ALL(read, *)
1362 _PCI_NOP_ALL(write,)
1364 static inline struct pci_dev *pci_get_device(unsigned int vendor,
1365 unsigned int device,
1366 struct pci_dev *from)
1369 static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
1370 unsigned int device,
1371 unsigned int ss_vendor,
1372 unsigned int ss_device,
1373 struct pci_dev *from)
1376 static inline struct pci_dev *pci_get_class(unsigned int class,
1377 struct pci_dev *from)
1380 #define pci_dev_present(ids) (0)
1381 #define no_pci_devices() (1)
1382 #define pci_dev_put(dev) do { } while (0)
1384 static inline void pci_set_master(struct pci_dev *dev) { }
1385 static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
1386 static inline void pci_disable_device(struct pci_dev *dev) { }
1387 static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
1389 static inline int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
1391 static inline int pci_set_dma_max_seg_size(struct pci_dev *dev,
1394 static inline int pci_set_dma_seg_boundary(struct pci_dev *dev,
1397 static inline int pci_assign_resource(struct pci_dev *dev, int i)
1399 static inline int __pci_register_driver(struct pci_driver *drv,
1400 struct module *owner)
1402 static inline int pci_register_driver(struct pci_driver *drv)
1404 static inline void pci_unregister_driver(struct pci_driver *drv) { }
1405 static inline int pci_find_capability(struct pci_dev *dev, int cap)
1407 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
1410 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
1413 /* Power management related routines */
1414 static inline int pci_save_state(struct pci_dev *dev) { return 0; }
1415 static inline void pci_restore_state(struct pci_dev *dev) { }
1416 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
1418 static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable)
1420 static inline pci_power_t pci_choose_state(struct pci_dev *dev,
1423 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1427 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
1429 static inline void pci_release_regions(struct pci_dev *dev) { }
1431 #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
1433 static inline void pci_block_cfg_access(struct pci_dev *dev) { }
1434 static inline int pci_block_cfg_access_in_atomic(struct pci_dev *dev)
1436 static inline void pci_unblock_cfg_access(struct pci_dev *dev) { }
1438 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
1440 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
1443 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
1447 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
1448 static inline struct pci_dev *pci_dev_get(struct pci_dev *dev) { return NULL; }
1449 static inline int pci_get_new_domain_nr(void) { return -ENOSYS; }
1451 #define dev_is_pci(d) (false)
1452 #define dev_is_pf(d) (false)
1453 #define dev_num_vf(d) (0)
1454 #endif /* CONFIG_PCI */
1456 /* Include architecture-dependent settings and functions */
1458 #include <asm/pci.h>
1460 /* these helpers provide future and backwards compatibility
1461 * for accessing popular PCI BAR info */
1462 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
1463 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
1464 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
1465 #define pci_resource_len(dev,bar) \
1466 ((pci_resource_start((dev), (bar)) == 0 && \
1467 pci_resource_end((dev), (bar)) == \
1468 pci_resource_start((dev), (bar))) ? 0 : \
1470 (pci_resource_end((dev), (bar)) - \
1471 pci_resource_start((dev), (bar)) + 1))
1473 /* Similar to the helpers above, these manipulate per-pci_dev
1474 * driver-specific data. They are really just a wrapper around
1475 * the generic device structure functions of these calls.
1477 static inline void *pci_get_drvdata(struct pci_dev *pdev)
1479 return dev_get_drvdata(&pdev->dev);
1482 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
1484 dev_set_drvdata(&pdev->dev, data);
1487 /* If you want to know what to call your pci_dev, ask this function.
1488 * Again, it's a wrapper around the generic device.
1490 static inline const char *pci_name(const struct pci_dev *pdev)
1492 return dev_name(&pdev->dev);
1496 /* Some archs don't want to expose struct resource to userland as-is
1497 * in sysfs and /proc
1499 #ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
1500 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
1501 const struct resource *rsrc, resource_size_t *start,
1502 resource_size_t *end)
1504 *start = rsrc->start;
1507 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
1511 * The world is not perfect and supplies us with broken PCI devices.
1512 * For at least a part of these bugs we need a work-around, so both
1513 * generic (drivers/pci/quirks.c) and per-architecture code can define
1514 * fixup hooks to be called for particular buggy devices.
1518 u16 vendor; /* You can use PCI_ANY_ID here of course */
1519 u16 device; /* You can use PCI_ANY_ID here of course */
1520 u32 class; /* You can use PCI_ANY_ID here too */
1521 unsigned int class_shift; /* should be 0, 8, 16 */
1522 void (*hook)(struct pci_dev *dev);
1525 enum pci_fixup_pass {
1526 pci_fixup_early, /* Before probing BARs */
1527 pci_fixup_header, /* After reading configuration header */
1528 pci_fixup_final, /* Final phase of device fixups */
1529 pci_fixup_enable, /* pci_enable_device() time */
1530 pci_fixup_resume, /* pci_device_resume() */
1531 pci_fixup_suspend, /* pci_device_suspend() */
1532 pci_fixup_resume_early, /* pci_device_resume_early() */
1533 pci_fixup_suspend_late, /* pci_device_suspend_late() */
1536 /* Anonymous variables would be nice... */
1537 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \
1538 class_shift, hook) \
1539 static const struct pci_fixup __PASTE(__pci_fixup_##name,__LINE__) __used \
1540 __attribute__((__section__(#section), aligned((sizeof(void *))))) \
1541 = { vendor, device, class, class_shift, hook };
1543 #define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class, \
1544 class_shift, hook) \
1545 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1546 hook, vendor, device, class, class_shift, hook)
1547 #define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class, \
1548 class_shift, hook) \
1549 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1550 hook, vendor, device, class, class_shift, hook)
1551 #define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class, \
1552 class_shift, hook) \
1553 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1554 hook, vendor, device, class, class_shift, hook)
1555 #define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class, \
1556 class_shift, hook) \
1557 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1558 hook, vendor, device, class, class_shift, hook)
1559 #define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class, \
1560 class_shift, hook) \
1561 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1562 resume##hook, vendor, device, class, \
1564 #define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class, \
1565 class_shift, hook) \
1566 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1567 resume_early##hook, vendor, device, \
1568 class, class_shift, hook)
1569 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class, \
1570 class_shift, hook) \
1571 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1572 suspend##hook, vendor, device, class, \
1574 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND_LATE(vendor, device, class, \
1575 class_shift, hook) \
1576 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
1577 suspend_late##hook, vendor, device, \
1578 class, class_shift, hook)
1580 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
1581 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1582 hook, vendor, device, PCI_ANY_ID, 0, hook)
1583 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
1584 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1585 hook, vendor, device, PCI_ANY_ID, 0, hook)
1586 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
1587 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1588 hook, vendor, device, PCI_ANY_ID, 0, hook)
1589 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
1590 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1591 hook, vendor, device, PCI_ANY_ID, 0, hook)
1592 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
1593 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1594 resume##hook, vendor, device, \
1595 PCI_ANY_ID, 0, hook)
1596 #define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
1597 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1598 resume_early##hook, vendor, device, \
1599 PCI_ANY_ID, 0, hook)
1600 #define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
1601 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1602 suspend##hook, vendor, device, \
1603 PCI_ANY_ID, 0, hook)
1604 #define DECLARE_PCI_FIXUP_SUSPEND_LATE(vendor, device, hook) \
1605 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
1606 suspend_late##hook, vendor, device, \
1607 PCI_ANY_ID, 0, hook)
1609 #ifdef CONFIG_PCI_QUIRKS
1610 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
1611 int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags);
1612 void pci_dev_specific_enable_acs(struct pci_dev *dev);
1614 static inline void pci_fixup_device(enum pci_fixup_pass pass,
1615 struct pci_dev *dev) { }
1616 static inline int pci_dev_specific_acs_enabled(struct pci_dev *dev,
1621 static inline void pci_dev_specific_enable_acs(struct pci_dev *dev) { }
1624 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
1625 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
1626 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
1627 int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name);
1628 int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
1630 void pcim_iounmap_regions(struct pci_dev *pdev, int mask);
1632 extern int pci_pci_problems;
1633 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
1634 #define PCIPCI_TRITON 2
1635 #define PCIPCI_NATOMA 4
1636 #define PCIPCI_VIAETBF 8
1637 #define PCIPCI_VSFX 16
1638 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
1639 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
1641 extern unsigned long pci_cardbus_io_size;
1642 extern unsigned long pci_cardbus_mem_size;
1643 extern u8 pci_dfl_cache_line_size;
1644 extern u8 pci_cache_line_size;
1646 extern unsigned long pci_hotplug_io_size;
1647 extern unsigned long pci_hotplug_mem_size;
1649 /* Architecture-specific versions may override these (weak) */
1650 void pcibios_disable_device(struct pci_dev *dev);
1651 void pcibios_set_master(struct pci_dev *dev);
1652 int pcibios_set_pcie_reset_state(struct pci_dev *dev,
1653 enum pcie_reset_state state);
1654 int pcibios_add_device(struct pci_dev *dev);
1655 void pcibios_release_device(struct pci_dev *dev);
1656 void pcibios_penalize_isa_irq(int irq, int active);
1658 #ifdef CONFIG_HIBERNATE_CALLBACKS
1659 extern struct dev_pm_ops pcibios_pm_ops;
1662 #ifdef CONFIG_PCI_MMCONFIG
1663 void __init pci_mmcfg_early_init(void);
1664 void __init pci_mmcfg_late_init(void);
1666 static inline void pci_mmcfg_early_init(void) { }
1667 static inline void pci_mmcfg_late_init(void) { }
1670 int pci_ext_cfg_avail(void);
1672 void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
1674 #ifdef CONFIG_PCI_IOV
1675 int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
1676 void pci_disable_sriov(struct pci_dev *dev);
1677 int pci_num_vf(struct pci_dev *dev);
1678 int pci_vfs_assigned(struct pci_dev *dev);
1679 int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs);
1680 int pci_sriov_get_totalvfs(struct pci_dev *dev);
1682 static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
1684 static inline void pci_disable_sriov(struct pci_dev *dev) { }
1685 static inline int pci_num_vf(struct pci_dev *dev) { return 0; }
1686 static inline int pci_vfs_assigned(struct pci_dev *dev)
1688 static inline int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs)
1690 static inline int pci_sriov_get_totalvfs(struct pci_dev *dev)
1694 #if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
1695 void pci_hp_create_module_link(struct pci_slot *pci_slot);
1696 void pci_hp_remove_module_link(struct pci_slot *pci_slot);
1700 * pci_pcie_cap - get the saved PCIe capability offset
1703 * PCIe capability offset is calculated at PCI device initialization
1704 * time and saved in the data structure. This function returns saved
1705 * PCIe capability offset. Using this instead of pci_find_capability()
1706 * reduces unnecessary search in the PCI configuration space. If you
1707 * need to calculate PCIe capability offset from raw device for some
1708 * reasons, please use pci_find_capability() instead.
1710 static inline int pci_pcie_cap(struct pci_dev *dev)
1712 return dev->pcie_cap;
1716 * pci_is_pcie - check if the PCI device is PCI Express capable
1719 * Returns: true if the PCI device is PCI Express capable, false otherwise.
1721 static inline bool pci_is_pcie(struct pci_dev *dev)
1723 return pci_pcie_cap(dev);
1727 * pcie_caps_reg - get the PCIe Capabilities Register
1730 static inline u16 pcie_caps_reg(const struct pci_dev *dev)
1732 return dev->pcie_flags_reg;
1736 * pci_pcie_type - get the PCIe device/port type
1739 static inline int pci_pcie_type(const struct pci_dev *dev)
1741 return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4;
1744 void pci_request_acs(void);
1745 bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags);
1746 bool pci_acs_path_enabled(struct pci_dev *start,
1747 struct pci_dev *end, u16 acs_flags);
1749 #define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */
1750 #define PCI_VPD_LRDT_ID(x) ((x) | PCI_VPD_LRDT)
1752 /* Large Resource Data Type Tag Item Names */
1753 #define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */
1754 #define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */
1755 #define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */
1757 #define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING)
1758 #define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA)
1759 #define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA)
1761 /* Small Resource Data Type Tag Item Names */
1762 #define PCI_VPD_STIN_END 0x78 /* End */
1764 #define PCI_VPD_SRDT_END PCI_VPD_STIN_END
1766 #define PCI_VPD_SRDT_TIN_MASK 0x78
1767 #define PCI_VPD_SRDT_LEN_MASK 0x07
1769 #define PCI_VPD_LRDT_TAG_SIZE 3
1770 #define PCI_VPD_SRDT_TAG_SIZE 1
1772 #define PCI_VPD_INFO_FLD_HDR_SIZE 3
1774 #define PCI_VPD_RO_KEYWORD_PARTNO "PN"
1775 #define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
1776 #define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
1777 #define PCI_VPD_RO_KEYWORD_CHKSUM "RV"
1780 * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length
1781 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
1783 * Returns the extracted Large Resource Data Type length.
1785 static inline u16 pci_vpd_lrdt_size(const u8 *lrdt)
1787 return (u16)lrdt[1] + ((u16)lrdt[2] << 8);
1791 * pci_vpd_srdt_size - Extracts the Small Resource Data Type length
1792 * @lrdt: Pointer to the beginning of the Small Resource Data Type tag
1794 * Returns the extracted Small Resource Data Type length.
1796 static inline u8 pci_vpd_srdt_size(const u8 *srdt)
1798 return (*srdt) & PCI_VPD_SRDT_LEN_MASK;
1802 * pci_vpd_info_field_size - Extracts the information field length
1803 * @lrdt: Pointer to the beginning of an information field header
1805 * Returns the extracted information field length.
1807 static inline u8 pci_vpd_info_field_size(const u8 *info_field)
1809 return info_field[2];
1813 * pci_vpd_find_tag - Locates the Resource Data Type tag provided
1814 * @buf: Pointer to buffered vpd data
1815 * @off: The offset into the buffer at which to begin the search
1816 * @len: The length of the vpd buffer
1817 * @rdt: The Resource Data Type to search for
1819 * Returns the index where the Resource Data Type was found or
1820 * -ENOENT otherwise.
1822 int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt);
1825 * pci_vpd_find_info_keyword - Locates an information field keyword in the VPD
1826 * @buf: Pointer to buffered vpd data
1827 * @off: The offset into the buffer at which to begin the search
1828 * @len: The length of the buffer area, relative to off, in which to search
1829 * @kw: The keyword to search for
1831 * Returns the index where the information field keyword was found or
1832 * -ENOENT otherwise.
1834 int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
1835 unsigned int len, const char *kw);
1837 /* PCI <-> OF binding helpers */
1840 void pci_set_of_node(struct pci_dev *dev);
1841 void pci_release_of_node(struct pci_dev *dev);
1842 void pci_set_bus_of_node(struct pci_bus *bus);
1843 void pci_release_bus_of_node(struct pci_bus *bus);
1845 /* Arch may override this (weak) */
1846 struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus);
1848 static inline struct device_node *
1849 pci_device_to_OF_node(const struct pci_dev *pdev)
1851 return pdev ? pdev->dev.of_node : NULL;
1854 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
1856 return bus ? bus->dev.of_node : NULL;
1859 #else /* CONFIG_OF */
1860 static inline void pci_set_of_node(struct pci_dev *dev) { }
1861 static inline void pci_release_of_node(struct pci_dev *dev) { }
1862 static inline void pci_set_bus_of_node(struct pci_bus *bus) { }
1863 static inline void pci_release_bus_of_node(struct pci_bus *bus) { }
1864 static inline struct device_node *
1865 pci_device_to_OF_node(const struct pci_dev *pdev) { return NULL; }
1866 #endif /* CONFIG_OF */
1869 static inline struct eeh_dev *pci_dev_to_eeh_dev(struct pci_dev *pdev)
1871 return pdev->dev.archdata.edev;
1875 int pci_for_each_dma_alias(struct pci_dev *pdev,
1876 int (*fn)(struct pci_dev *pdev,
1877 u16 alias, void *data), void *data);
1879 /* helper functions for operation of device flag */
1880 static inline void pci_set_dev_assigned(struct pci_dev *pdev)
1882 pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED;
1884 static inline void pci_clear_dev_assigned(struct pci_dev *pdev)
1886 pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
1888 static inline bool pci_is_dev_assigned(struct pci_dev *pdev)
1890 return (pdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED) == PCI_DEV_FLAGS_ASSIGNED;
1892 #endif /* LINUX_PCI_H */