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/pci_regs.h> /* The pci register defines */
23 * The PCI interface treats multi-function devices as independent
24 * devices. The slot/function address of each device is encoded
25 * in a single byte as follows:
30 #define PCI_DEVFN(slot, func) ((((slot) & 0x1f) << 3) | ((func) & 0x07))
31 #define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f)
32 #define PCI_FUNC(devfn) ((devfn) & 0x07)
34 /* Ioctls for /proc/bus/pci/X/Y nodes. */
35 #define PCIIOC_BASE ('P' << 24 | 'C' << 16 | 'I' << 8)
36 #define PCIIOC_CONTROLLER (PCIIOC_BASE | 0x00) /* Get controller for PCI device. */
37 #define PCIIOC_MMAP_IS_IO (PCIIOC_BASE | 0x01) /* Set mmap state to I/O space. */
38 #define PCIIOC_MMAP_IS_MEM (PCIIOC_BASE | 0x02) /* Set mmap state to MEM space. */
39 #define PCIIOC_WRITE_COMBINE (PCIIOC_BASE | 0x03) /* Enable/disable write-combining. */
43 #include <linux/mod_devicetable.h>
45 #include <linux/types.h>
46 #include <linux/init.h>
47 #include <linux/ioport.h>
48 #include <linux/list.h>
49 #include <linux/compiler.h>
50 #include <linux/errno.h>
51 #include <linux/kobject.h>
52 #include <linux/atomic.h>
53 #include <linux/device.h>
55 #include <linux/irqreturn.h>
57 /* Include the ID list */
58 #include <linux/pci_ids.h>
60 /* pci_slot represents a physical slot */
62 struct pci_bus *bus; /* The bus this slot is on */
63 struct list_head list; /* node in list of slots on this bus */
64 struct hotplug_slot *hotplug; /* Hotplug info (migrate over time) */
65 unsigned char number; /* PCI_SLOT(pci_dev->devfn) */
69 static inline const char *pci_slot_name(const struct pci_slot *slot)
71 return kobject_name(&slot->kobj);
74 /* File state for mmap()s on /proc/bus/pci/X/Y */
80 /* This defines the direction arg to the DMA mapping routines. */
81 #define PCI_DMA_BIDIRECTIONAL 0
82 #define PCI_DMA_TODEVICE 1
83 #define PCI_DMA_FROMDEVICE 2
84 #define PCI_DMA_NONE 3
87 * For PCI devices, the region numbers are assigned this way:
90 /* #0-5: standard PCI resources */
92 PCI_STD_RESOURCE_END = 5,
94 /* #6: expansion ROM resource */
97 /* device specific resources */
100 PCI_IOV_RESOURCE_END = PCI_IOV_RESOURCES + PCI_SRIOV_NUM_BARS - 1,
103 /* resources assigned to buses behind the bridge */
104 #define PCI_BRIDGE_RESOURCE_NUM 4
106 PCI_BRIDGE_RESOURCES,
107 PCI_BRIDGE_RESOURCE_END = PCI_BRIDGE_RESOURCES +
108 PCI_BRIDGE_RESOURCE_NUM - 1,
110 /* total resources associated with a PCI device */
113 /* preserve this for compatibility */
114 DEVICE_COUNT_RESOURCE = PCI_NUM_RESOURCES,
117 typedef int __bitwise pci_power_t;
119 #define PCI_D0 ((pci_power_t __force) 0)
120 #define PCI_D1 ((pci_power_t __force) 1)
121 #define PCI_D2 ((pci_power_t __force) 2)
122 #define PCI_D3hot ((pci_power_t __force) 3)
123 #define PCI_D3cold ((pci_power_t __force) 4)
124 #define PCI_UNKNOWN ((pci_power_t __force) 5)
125 #define PCI_POWER_ERROR ((pci_power_t __force) -1)
127 /* Remember to update this when the list above changes! */
128 extern const char *pci_power_names[];
130 static inline const char *pci_power_name(pci_power_t state)
132 return pci_power_names[1 + (int) state];
135 #define PCI_PM_D2_DELAY 200
136 #define PCI_PM_D3_WAIT 10
137 #define PCI_PM_BUS_WAIT 50
139 /** The pci_channel state describes connectivity between the CPU and
140 * the pci device. If some PCI bus between here and the pci device
141 * has crashed or locked up, this info is reflected here.
143 typedef unsigned int __bitwise pci_channel_state_t;
145 enum pci_channel_state {
146 /* I/O channel is in normal state */
147 pci_channel_io_normal = (__force pci_channel_state_t) 1,
149 /* I/O to channel is blocked */
150 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
152 /* PCI card is dead */
153 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
156 typedef unsigned int __bitwise pcie_reset_state_t;
158 enum pcie_reset_state {
159 /* Reset is NOT asserted (Use to deassert reset) */
160 pcie_deassert_reset = (__force pcie_reset_state_t) 1,
162 /* Use #PERST to reset PCI-E device */
163 pcie_warm_reset = (__force pcie_reset_state_t) 2,
165 /* Use PCI-E Hot Reset to reset device */
166 pcie_hot_reset = (__force pcie_reset_state_t) 3
169 typedef unsigned short __bitwise pci_dev_flags_t;
171 /* INTX_DISABLE in PCI_COMMAND register disables MSI
174 PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) 1,
175 /* Device configuration is irrevocably lost if disabled into D3 */
176 PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) 2,
177 /* Provide indication device is assigned by a Virtual Machine Manager */
178 PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) 4,
179 /* Device causes system crash if in D3 during S3 sleep */
180 PCI_DEV_FLAGS_NO_D3_DURING_SLEEP = (__force pci_dev_flags_t) 8,
183 enum pci_irq_reroute_variant {
184 INTEL_IRQ_REROUTE_VARIANT = 1,
185 MAX_IRQ_REROUTE_VARIANTS = 3
188 typedef unsigned short __bitwise pci_bus_flags_t;
190 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
191 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
194 /* Based on the PCI Hotplug Spec, but some values are made up by us */
196 PCI_SPEED_33MHz = 0x00,
197 PCI_SPEED_66MHz = 0x01,
198 PCI_SPEED_66MHz_PCIX = 0x02,
199 PCI_SPEED_100MHz_PCIX = 0x03,
200 PCI_SPEED_133MHz_PCIX = 0x04,
201 PCI_SPEED_66MHz_PCIX_ECC = 0x05,
202 PCI_SPEED_100MHz_PCIX_ECC = 0x06,
203 PCI_SPEED_133MHz_PCIX_ECC = 0x07,
204 PCI_SPEED_66MHz_PCIX_266 = 0x09,
205 PCI_SPEED_100MHz_PCIX_266 = 0x0a,
206 PCI_SPEED_133MHz_PCIX_266 = 0x0b,
212 PCI_SPEED_66MHz_PCIX_533 = 0x11,
213 PCI_SPEED_100MHz_PCIX_533 = 0x12,
214 PCI_SPEED_133MHz_PCIX_533 = 0x13,
215 PCIE_SPEED_2_5GT = 0x14,
216 PCIE_SPEED_5_0GT = 0x15,
217 PCIE_SPEED_8_0GT = 0x16,
218 PCI_SPEED_UNKNOWN = 0xff,
221 struct pci_cap_saved_data {
227 struct pci_cap_saved_state {
228 struct hlist_node next;
229 struct pci_cap_saved_data cap;
232 struct pcie_link_state;
238 * The pci_dev structure is used to describe PCI devices.
241 struct list_head bus_list; /* node in per-bus list */
242 struct pci_bus *bus; /* bus this device is on */
243 struct pci_bus *subordinate; /* bus this device bridges to */
245 void *sysdata; /* hook for sys-specific extension */
246 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
247 struct pci_slot *slot; /* Physical slot this device is in */
249 unsigned int devfn; /* encoded device & function index */
250 unsigned short vendor;
251 unsigned short device;
252 unsigned short subsystem_vendor;
253 unsigned short subsystem_device;
254 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
255 u8 revision; /* PCI revision, low byte of class word */
256 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
257 u8 pcie_cap; /* PCI-E capability offset */
258 u8 pcie_type:4; /* PCI-E device/port type */
259 u8 pcie_mpss:3; /* PCI-E Max Payload Size Supported */
260 u8 rom_base_reg; /* which config register controls the ROM */
261 u8 pin; /* which interrupt pin this device uses */
263 struct pci_driver *driver; /* which driver has allocated this device */
264 u64 dma_mask; /* Mask of the bits of bus address this
265 device implements. Normally this is
266 0xffffffff. You only need to change
267 this if your device has broken DMA
268 or supports 64-bit transfers. */
270 struct device_dma_parameters dma_parms;
272 pci_power_t current_state; /* Current operating state. In ACPI-speak,
273 this is D0-D3, D0 being fully functional,
275 int pm_cap; /* PM capability offset in the
276 configuration space */
277 unsigned int pme_support:5; /* Bitmask of states from which PME#
279 unsigned int pme_interrupt:1;
280 unsigned int pme_poll:1; /* Poll device's PME status bit */
281 unsigned int d1_support:1; /* Low power state D1 is supported */
282 unsigned int d2_support:1; /* Low power state D2 is supported */
283 unsigned int no_d1d2:1; /* Only allow D0 and D3 */
284 unsigned int mmio_always_on:1; /* disallow turning off io/mem
285 decoding during bar sizing */
286 unsigned int wakeup_prepared:1;
287 unsigned int d3_delay; /* D3->D0 transition time in ms */
289 #ifdef CONFIG_PCIEASPM
290 struct pcie_link_state *link_state; /* ASPM link state. */
293 pci_channel_state_t error_state; /* current connectivity state */
294 struct device dev; /* Generic device interface */
296 int cfg_size; /* Size of configuration space */
299 * Instead of touching interrupt line and base address registers
300 * directly, use the values stored here. They might be different!
303 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
305 /* These fields are used by common fixups */
306 unsigned int transparent:1; /* Transparent PCI bridge */
307 unsigned int multifunction:1;/* Part of multi-function device */
308 /* keep track of device state */
309 unsigned int is_added:1;
310 unsigned int is_busmaster:1; /* device is busmaster */
311 unsigned int no_msi:1; /* device may not use msi */
312 unsigned int block_cfg_access:1; /* config space access is blocked */
313 unsigned int broken_parity_status:1; /* Device generates false positive parity */
314 unsigned int irq_reroute_variant:2; /* device needs IRQ rerouting variant */
315 unsigned int msi_enabled:1;
316 unsigned int msix_enabled:1;
317 unsigned int ari_enabled:1; /* ARI forwarding */
318 unsigned int is_managed:1;
319 unsigned int is_pcie:1; /* Obsolete. Will be removed.
320 Use pci_is_pcie() instead */
321 unsigned int needs_freset:1; /* Dev requires fundamental reset */
322 unsigned int state_saved:1;
323 unsigned int is_physfn:1;
324 unsigned int is_virtfn:1;
325 unsigned int reset_fn:1;
326 unsigned int is_hotplug_bridge:1;
327 unsigned int __aer_firmware_first_valid:1;
328 unsigned int __aer_firmware_first:1;
329 pci_dev_flags_t dev_flags;
330 atomic_t enable_cnt; /* pci_enable_device has been called */
332 u32 saved_config_space[16]; /* config space saved at suspend time */
333 struct hlist_head saved_cap_space;
334 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
335 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
336 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
337 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
338 #ifdef CONFIG_PCI_MSI
339 struct list_head msi_list;
340 struct kset *msi_kset;
343 #ifdef CONFIG_PCI_ATS
345 struct pci_sriov *sriov; /* SR-IOV capability related */
346 struct pci_dev *physfn; /* the PF this VF is associated with */
348 struct pci_ats *ats; /* Address Translation Service */
352 static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
354 #ifdef CONFIG_PCI_IOV
362 extern struct pci_dev *alloc_pci_dev(void);
364 #define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
365 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
366 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
368 static inline int pci_channel_offline(struct pci_dev *pdev)
370 return (pdev->error_state != pci_channel_io_normal);
373 struct pci_host_bridge_window {
374 struct list_head list;
375 struct resource *res; /* host bridge aperture (CPU address) */
376 resource_size_t offset; /* bus address + offset = CPU address */
379 struct pci_host_bridge {
381 struct pci_bus *bus; /* root bus */
382 struct list_head windows; /* pci_host_bridge_windows */
383 void (*release_fn)(struct pci_host_bridge *);
387 #define to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev)
388 void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
389 void (*release_fn)(struct pci_host_bridge *),
393 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
394 * to P2P or CardBus bridge windows) go in a table. Additional ones (for
395 * buses below host bridges or subtractive decode bridges) go in the list.
396 * Use pci_bus_for_each_resource() to iterate through all the resources.
400 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly
401 * and there's no way to program the bridge with the details of the window.
402 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive-
403 * decode bit set, because they are explicit and can be programmed with _SRS.
405 #define PCI_SUBTRACTIVE_DECODE 0x1
407 struct pci_bus_resource {
408 struct list_head list;
409 struct resource *res;
413 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
416 struct list_head node; /* node in list of buses */
417 struct pci_bus *parent; /* parent bus this bridge is on */
418 struct list_head children; /* list of child buses */
419 struct list_head devices; /* list of devices on this bus */
420 struct pci_dev *self; /* bridge device as seen by parent */
421 struct list_head slots; /* list of slots on this bus */
422 struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
423 struct list_head resources; /* address space routed to this bus */
425 struct pci_ops *ops; /* configuration access functions */
426 void *sysdata; /* hook for sys-specific extension */
427 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
429 unsigned char number; /* bus number */
430 unsigned char primary; /* number of primary bridge */
431 unsigned char secondary; /* number of secondary bridge */
432 unsigned char subordinate; /* max number of subordinate buses */
433 unsigned char max_bus_speed; /* enum pci_bus_speed */
434 unsigned char cur_bus_speed; /* enum pci_bus_speed */
438 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
439 pci_bus_flags_t bus_flags; /* Inherited by child busses */
440 struct device *bridge;
442 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
443 struct bin_attribute *legacy_mem; /* legacy mem */
444 unsigned int is_added:1;
447 #define pci_bus_b(n) list_entry(n, struct pci_bus, node)
448 #define to_pci_bus(n) container_of(n, struct pci_bus, dev)
451 * Returns true if the pci bus is root (behind host-pci bridge),
454 static inline bool pci_is_root_bus(struct pci_bus *pbus)
456 return !(pbus->parent);
459 #ifdef CONFIG_PCI_MSI
460 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
462 return pci_dev->msi_enabled || pci_dev->msix_enabled;
465 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
469 * Error values that may be returned by PCI functions.
471 #define PCIBIOS_SUCCESSFUL 0x00
472 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
473 #define PCIBIOS_BAD_VENDOR_ID 0x83
474 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
475 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
476 #define PCIBIOS_SET_FAILED 0x88
477 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
479 /* Low-level architecture-dependent routines */
482 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
483 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
487 * ACPI needs to be able to access PCI config space before we've done a
488 * PCI bus scan and created pci_bus structures.
490 extern int raw_pci_read(unsigned int domain, unsigned int bus,
491 unsigned int devfn, int reg, int len, u32 *val);
492 extern int raw_pci_write(unsigned int domain, unsigned int bus,
493 unsigned int devfn, int reg, int len, u32 val);
495 struct pci_bus_region {
496 resource_size_t start;
501 spinlock_t lock; /* protects list, index */
502 struct list_head list; /* for IDs added at runtime */
505 /* ---------------------------------------------------------------- */
506 /** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
507 * a set of callbacks in struct pci_error_handlers, then that device driver
508 * will be notified of PCI bus errors, and will be driven to recovery
509 * when an error occurs.
512 typedef unsigned int __bitwise pci_ers_result_t;
514 enum pci_ers_result {
515 /* no result/none/not supported in device driver */
516 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
518 /* Device driver can recover without slot reset */
519 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
521 /* Device driver wants slot to be reset. */
522 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
524 /* Device has completely failed, is unrecoverable */
525 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
527 /* Device driver is fully recovered and operational */
528 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
531 /* PCI bus error event callbacks */
532 struct pci_error_handlers {
533 /* PCI bus error detected on this device */
534 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
535 enum pci_channel_state error);
537 /* MMIO has been re-enabled, but not DMA */
538 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
540 /* PCI Express link has been reset */
541 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
543 /* PCI slot has been reset */
544 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
546 /* Device driver may resume normal operations */
547 void (*resume)(struct pci_dev *dev);
550 /* ---------------------------------------------------------------- */
554 struct list_head node;
556 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
557 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
558 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
559 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
560 int (*suspend_late) (struct pci_dev *dev, pm_message_t state);
561 int (*resume_early) (struct pci_dev *dev);
562 int (*resume) (struct pci_dev *dev); /* Device woken up */
563 void (*shutdown) (struct pci_dev *dev);
564 struct pci_error_handlers *err_handler;
565 struct device_driver driver;
566 struct pci_dynids dynids;
569 #define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
572 * DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table
573 * @_table: device table name
575 * This macro is used to create a struct pci_device_id array (a device table)
576 * in a generic manner.
578 #define DEFINE_PCI_DEVICE_TABLE(_table) \
579 const struct pci_device_id _table[] __devinitconst
582 * PCI_DEVICE - macro used to describe a specific pci device
583 * @vend: the 16 bit PCI Vendor ID
584 * @dev: the 16 bit PCI Device ID
586 * This macro is used to create a struct pci_device_id that matches a
587 * specific device. The subvendor and subdevice fields will be set to
590 #define PCI_DEVICE(vend,dev) \
591 .vendor = (vend), .device = (dev), \
592 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
595 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
596 * @dev_class: the class, subclass, prog-if triple for this device
597 * @dev_class_mask: the class mask for this device
599 * This macro is used to create a struct pci_device_id that matches a
600 * specific PCI class. The vendor, device, subvendor, and subdevice
601 * fields will be set to PCI_ANY_ID.
603 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
604 .class = (dev_class), .class_mask = (dev_class_mask), \
605 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
606 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
609 * PCI_VDEVICE - macro used to describe a specific pci device in short form
610 * @vendor: the vendor name
611 * @device: the 16 bit PCI Device ID
613 * This macro is used to create a struct pci_device_id that matches a
614 * specific PCI device. The subvendor, and subdevice fields will be set
615 * to PCI_ANY_ID. The macro allows the next field to follow as the device
619 #define PCI_VDEVICE(vendor, device) \
620 PCI_VENDOR_ID_##vendor, (device), \
621 PCI_ANY_ID, PCI_ANY_ID, 0, 0
623 /* these external functions are only available when PCI support is enabled */
626 extern void pcie_bus_configure_settings(struct pci_bus *bus, u8 smpss);
628 enum pcie_bus_config_types {
631 PCIE_BUS_PERFORMANCE,
635 extern enum pcie_bus_config_types pcie_bus_config;
637 extern struct bus_type pci_bus_type;
639 /* Do NOT directly access these two variables, unless you are arch specific pci
640 * code, or pci core code. */
641 extern struct list_head pci_root_buses; /* list of all known PCI buses */
642 /* Some device drivers need know if pci is initiated */
643 extern int no_pci_devices(void);
645 void pcibios_fixup_bus(struct pci_bus *);
646 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
647 char *pcibios_setup(char *str);
649 /* Used only when drivers/pci/setup.c is used */
650 resource_size_t pcibios_align_resource(void *, const struct resource *,
653 void pcibios_update_irq(struct pci_dev *, int irq);
655 /* Weak but can be overriden by arch */
656 void pci_fixup_cardbus(struct pci_bus *);
658 /* Generic PCI functions used internally */
660 void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
661 struct resource *res);
662 void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
663 struct pci_bus_region *region);
664 void pcibios_scan_specific_bus(int busn);
665 extern struct pci_bus *pci_find_bus(int domain, int busnr);
666 void pci_bus_add_devices(const struct pci_bus *bus);
667 struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
668 struct pci_ops *ops, void *sysdata);
669 struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
670 struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
671 struct pci_ops *ops, void *sysdata,
672 struct list_head *resources);
673 struct pci_bus * __devinit pci_scan_root_bus(struct device *parent, int bus,
674 struct pci_ops *ops, void *sysdata,
675 struct list_head *resources);
676 struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
678 void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
679 struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
681 struct hotplug_slot *hotplug);
682 void pci_destroy_slot(struct pci_slot *slot);
683 void pci_renumber_slot(struct pci_slot *slot, int slot_nr);
684 int pci_scan_slot(struct pci_bus *bus, int devfn);
685 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
686 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
687 unsigned int pci_scan_child_bus(struct pci_bus *bus);
688 int __must_check pci_bus_add_device(struct pci_dev *dev);
689 void pci_read_bridge_bases(struct pci_bus *child);
690 struct resource *pci_find_parent_resource(const struct pci_dev *dev,
691 struct resource *res);
692 u8 pci_swizzle_interrupt_pin(const struct pci_dev *dev, u8 pin);
693 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
694 u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
695 extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
696 extern void pci_dev_put(struct pci_dev *dev);
697 extern void pci_remove_bus(struct pci_bus *b);
698 extern void __pci_remove_bus_device(struct pci_dev *dev);
699 extern void pci_stop_and_remove_bus_device(struct pci_dev *dev);
700 extern void pci_stop_bus_device(struct pci_dev *dev);
701 void pci_setup_cardbus(struct pci_bus *bus);
702 extern void pci_sort_breadthfirst(void);
703 #define dev_is_pci(d) ((d)->bus == &pci_bus_type)
704 #define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false))
705 #define dev_num_vf(d) ((dev_is_pci(d) ? pci_num_vf(to_pci_dev(d)) : 0))
707 /* Generic PCI functions exported to card drivers */
709 enum pci_lost_interrupt_reason {
710 PCI_LOST_IRQ_NO_INFORMATION = 0,
711 PCI_LOST_IRQ_DISABLE_MSI,
712 PCI_LOST_IRQ_DISABLE_MSIX,
713 PCI_LOST_IRQ_DISABLE_ACPI,
715 enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *dev);
716 int pci_find_capability(struct pci_dev *dev, int cap);
717 int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
718 int pci_find_ext_capability(struct pci_dev *dev, int cap);
719 int pci_bus_find_ext_capability(struct pci_bus *bus, unsigned int devfn,
721 int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
722 int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
723 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
725 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
726 struct pci_dev *from);
727 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
728 unsigned int ss_vendor, unsigned int ss_device,
729 struct pci_dev *from);
730 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
731 struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
733 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
736 return pci_get_domain_bus_and_slot(0, bus, devfn);
738 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
739 int pci_dev_present(const struct pci_device_id *ids);
741 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
743 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
744 int where, u16 *val);
745 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
746 int where, u32 *val);
747 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
749 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
751 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
753 struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
755 static inline int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val)
757 return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
759 static inline int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val)
761 return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
763 static inline int pci_read_config_dword(const struct pci_dev *dev, int where,
766 return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
768 static inline int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val)
770 return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
772 static inline int pci_write_config_word(const struct pci_dev *dev, int where, u16 val)
774 return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
776 static inline int pci_write_config_dword(const struct pci_dev *dev, int where,
779 return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
782 int __must_check pci_enable_device(struct pci_dev *dev);
783 int __must_check pci_enable_device_io(struct pci_dev *dev);
784 int __must_check pci_enable_device_mem(struct pci_dev *dev);
785 int __must_check pci_reenable_device(struct pci_dev *);
786 int __must_check pcim_enable_device(struct pci_dev *pdev);
787 void pcim_pin_device(struct pci_dev *pdev);
789 static inline int pci_is_enabled(struct pci_dev *pdev)
791 return (atomic_read(&pdev->enable_cnt) > 0);
794 static inline int pci_is_managed(struct pci_dev *pdev)
796 return pdev->is_managed;
799 void pci_disable_device(struct pci_dev *dev);
801 extern unsigned int pcibios_max_latency;
802 void pci_set_master(struct pci_dev *dev);
803 void pci_clear_master(struct pci_dev *dev);
805 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
806 int pci_set_cacheline_size(struct pci_dev *dev);
807 #define HAVE_PCI_SET_MWI
808 int __must_check pci_set_mwi(struct pci_dev *dev);
809 int pci_try_set_mwi(struct pci_dev *dev);
810 void pci_clear_mwi(struct pci_dev *dev);
811 void pci_intx(struct pci_dev *dev, int enable);
812 bool pci_intx_mask_supported(struct pci_dev *dev);
813 bool pci_check_and_mask_intx(struct pci_dev *dev);
814 bool pci_check_and_unmask_intx(struct pci_dev *dev);
815 void pci_msi_off(struct pci_dev *dev);
816 int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size);
817 int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask);
818 int pcix_get_max_mmrbc(struct pci_dev *dev);
819 int pcix_get_mmrbc(struct pci_dev *dev);
820 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
821 int pcie_get_readrq(struct pci_dev *dev);
822 int pcie_set_readrq(struct pci_dev *dev, int rq);
823 int pcie_get_mps(struct pci_dev *dev);
824 int pcie_set_mps(struct pci_dev *dev, int mps);
825 int __pci_reset_function(struct pci_dev *dev);
826 int __pci_reset_function_locked(struct pci_dev *dev);
827 int pci_reset_function(struct pci_dev *dev);
828 void pci_update_resource(struct pci_dev *dev, int resno);
829 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
830 int __must_check pci_reassign_resource(struct pci_dev *dev, int i, resource_size_t add_size, resource_size_t align);
831 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
833 /* ROM control related routines */
834 int pci_enable_rom(struct pci_dev *pdev);
835 void pci_disable_rom(struct pci_dev *pdev);
836 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
837 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
838 size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size);
840 /* Power management related routines */
841 int pci_save_state(struct pci_dev *dev);
842 void pci_restore_state(struct pci_dev *dev);
843 struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev);
844 int pci_load_saved_state(struct pci_dev *dev, struct pci_saved_state *state);
845 int pci_load_and_free_saved_state(struct pci_dev *dev,
846 struct pci_saved_state **state);
847 int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state);
848 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
849 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
850 bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
851 void pci_pme_active(struct pci_dev *dev, bool enable);
852 int __pci_enable_wake(struct pci_dev *dev, pci_power_t state,
853 bool runtime, bool enable);
854 int pci_wake_from_d3(struct pci_dev *dev, bool enable);
855 pci_power_t pci_target_state(struct pci_dev *dev);
856 int pci_prepare_to_sleep(struct pci_dev *dev);
857 int pci_back_from_sleep(struct pci_dev *dev);
858 bool pci_dev_run_wake(struct pci_dev *dev);
859 bool pci_check_pme_status(struct pci_dev *dev);
860 void pci_pme_wakeup_bus(struct pci_bus *bus);
862 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
865 return __pci_enable_wake(dev, state, false, enable);
868 #define PCI_EXP_IDO_REQUEST (1<<0)
869 #define PCI_EXP_IDO_COMPLETION (1<<1)
870 void pci_enable_ido(struct pci_dev *dev, unsigned long type);
871 void pci_disable_ido(struct pci_dev *dev, unsigned long type);
873 enum pci_obff_signal_type {
874 PCI_EXP_OBFF_SIGNAL_L0 = 0,
875 PCI_EXP_OBFF_SIGNAL_ALWAYS = 1,
877 int pci_enable_obff(struct pci_dev *dev, enum pci_obff_signal_type);
878 void pci_disable_obff(struct pci_dev *dev);
880 bool pci_ltr_supported(struct pci_dev *dev);
881 int pci_enable_ltr(struct pci_dev *dev);
882 void pci_disable_ltr(struct pci_dev *dev);
883 int pci_set_ltr(struct pci_dev *dev, int snoop_lat_ns, int nosnoop_lat_ns);
885 /* For use by arch with custom probe code */
886 void set_pcie_port_type(struct pci_dev *pdev);
887 void set_pcie_hotplug_bridge(struct pci_dev *pdev);
889 /* Functions for PCI Hotplug drivers to use */
890 int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
891 #ifdef CONFIG_HOTPLUG
892 unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge);
893 unsigned int pci_rescan_bus(struct pci_bus *bus);
896 /* Vital product data routines */
897 ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
898 ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
899 int pci_vpd_truncate(struct pci_dev *dev, size_t size);
901 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
902 resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx);
903 void pci_bus_assign_resources(const struct pci_bus *bus);
904 void pci_bus_size_bridges(struct pci_bus *bus);
905 int pci_claim_resource(struct pci_dev *, int);
906 void pci_assign_unassigned_resources(void);
907 void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
908 void pdev_enable_device(struct pci_dev *);
909 int pci_enable_resources(struct pci_dev *, int mask);
910 void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
911 int (*)(const struct pci_dev *, u8, u8));
912 #define HAVE_PCI_REQ_REGIONS 2
913 int __must_check pci_request_regions(struct pci_dev *, const char *);
914 int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
915 void pci_release_regions(struct pci_dev *);
916 int __must_check pci_request_region(struct pci_dev *, int, const char *);
917 int __must_check pci_request_region_exclusive(struct pci_dev *, int, const char *);
918 void pci_release_region(struct pci_dev *, int);
919 int pci_request_selected_regions(struct pci_dev *, int, const char *);
920 int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
921 void pci_release_selected_regions(struct pci_dev *, int);
923 /* drivers/pci/bus.c */
924 void pci_add_resource(struct list_head *resources, struct resource *res);
925 void pci_add_resource_offset(struct list_head *resources, struct resource *res,
926 resource_size_t offset);
927 void pci_free_resource_list(struct list_head *resources);
928 void pci_bus_add_resource(struct pci_bus *bus, struct resource *res, unsigned int flags);
929 struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n);
930 void pci_bus_remove_resources(struct pci_bus *bus);
932 #define pci_bus_for_each_resource(bus, res, i) \
934 (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
937 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
938 struct resource *res, resource_size_t size,
939 resource_size_t align, resource_size_t min,
940 unsigned int type_mask,
941 resource_size_t (*alignf)(void *,
942 const struct resource *,
946 void pci_enable_bridges(struct pci_bus *bus);
948 /* Proper probing supporting hot-pluggable devices */
949 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
950 const char *mod_name);
953 * pci_register_driver must be a macro so that KBUILD_MODNAME can be expanded
955 #define pci_register_driver(driver) \
956 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
958 void pci_unregister_driver(struct pci_driver *dev);
961 * module_pci_driver() - Helper macro for registering a PCI driver
962 * @__pci_driver: pci_driver struct
964 * Helper macro for PCI drivers which do not do anything special in module
965 * init/exit. This eliminates a lot of boilerplate. Each module may only
966 * use this macro once, and calling it replaces module_init() and module_exit()
968 #define module_pci_driver(__pci_driver) \
969 module_driver(__pci_driver, pci_register_driver, \
970 pci_unregister_driver)
972 void pci_stop_and_remove_behind_bridge(struct pci_dev *dev);
973 struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
974 int pci_add_dynid(struct pci_driver *drv,
975 unsigned int vendor, unsigned int device,
976 unsigned int subvendor, unsigned int subdevice,
977 unsigned int class, unsigned int class_mask,
978 unsigned long driver_data);
979 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
980 struct pci_dev *dev);
981 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
984 void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
986 int pci_cfg_space_size_ext(struct pci_dev *dev);
987 int pci_cfg_space_size(struct pci_dev *dev);
988 unsigned char pci_bus_max_busnr(struct pci_bus *bus);
989 void pci_setup_bridge(struct pci_bus *bus);
991 #define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
992 #define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)
994 int pci_set_vga_state(struct pci_dev *pdev, bool decode,
995 unsigned int command_bits, u32 flags);
996 /* kmem_cache style wrapper around pci_alloc_consistent() */
998 #include <linux/pci-dma.h>
999 #include <linux/dmapool.h>
1001 #define pci_pool dma_pool
1002 #define pci_pool_create(name, pdev, size, align, allocation) \
1003 dma_pool_create(name, &pdev->dev, size, align, allocation)
1004 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
1005 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
1006 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
1008 enum pci_dma_burst_strategy {
1009 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
1010 strategy_parameter is N/A */
1011 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
1013 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
1014 strategy_parameter byte boundaries */
1018 u32 vector; /* kernel uses to write allocated vector */
1019 u16 entry; /* driver uses to specify entry, OS writes */
1023 #ifndef CONFIG_PCI_MSI
1024 static inline int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec)
1029 static inline void pci_msi_shutdown(struct pci_dev *dev)
1031 static inline void pci_disable_msi(struct pci_dev *dev)
1034 static inline int pci_msix_table_size(struct pci_dev *dev)
1038 static inline int pci_enable_msix(struct pci_dev *dev,
1039 struct msix_entry *entries, int nvec)
1044 static inline void pci_msix_shutdown(struct pci_dev *dev)
1046 static inline void pci_disable_msix(struct pci_dev *dev)
1049 static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev)
1052 static inline void pci_restore_msi_state(struct pci_dev *dev)
1054 static inline int pci_msi_enabled(void)
1059 extern int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec);
1060 extern void pci_msi_shutdown(struct pci_dev *dev);
1061 extern void pci_disable_msi(struct pci_dev *dev);
1062 extern int pci_msix_table_size(struct pci_dev *dev);
1063 extern int pci_enable_msix(struct pci_dev *dev,
1064 struct msix_entry *entries, int nvec);
1065 extern void pci_msix_shutdown(struct pci_dev *dev);
1066 extern void pci_disable_msix(struct pci_dev *dev);
1067 extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
1068 extern void pci_restore_msi_state(struct pci_dev *dev);
1069 extern int pci_msi_enabled(void);
1072 #ifdef CONFIG_PCIEPORTBUS
1073 extern bool pcie_ports_disabled;
1074 extern bool pcie_ports_auto;
1076 #define pcie_ports_disabled true
1077 #define pcie_ports_auto false
1080 #ifndef CONFIG_PCIEASPM
1081 static inline int pcie_aspm_enabled(void) { return 0; }
1082 static inline bool pcie_aspm_support_enabled(void) { return false; }
1084 extern int pcie_aspm_enabled(void);
1085 extern bool pcie_aspm_support_enabled(void);
1088 #ifdef CONFIG_PCIEAER
1089 void pci_no_aer(void);
1090 bool pci_aer_available(void);
1092 static inline void pci_no_aer(void) { }
1093 static inline bool pci_aer_available(void) { return false; }
1096 #ifndef CONFIG_PCIE_ECRC
1097 static inline void pcie_set_ecrc_checking(struct pci_dev *dev)
1101 static inline void pcie_ecrc_get_policy(char *str) {};
1103 extern void pcie_set_ecrc_checking(struct pci_dev *dev);
1104 extern void pcie_ecrc_get_policy(char *str);
1107 #define pci_enable_msi(pdev) pci_enable_msi_block(pdev, 1)
1109 #ifdef CONFIG_HT_IRQ
1110 /* The functions a driver should call */
1111 int ht_create_irq(struct pci_dev *dev, int idx);
1112 void ht_destroy_irq(unsigned int irq);
1113 #endif /* CONFIG_HT_IRQ */
1115 extern void pci_cfg_access_lock(struct pci_dev *dev);
1116 extern bool pci_cfg_access_trylock(struct pci_dev *dev);
1117 extern void pci_cfg_access_unlock(struct pci_dev *dev);
1120 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
1121 * a PCI domain is defined to be a set of PCI busses which share
1122 * configuration space.
1124 #ifdef CONFIG_PCI_DOMAINS
1125 extern int pci_domains_supported;
1127 enum { pci_domains_supported = 0 };
1128 static inline int pci_domain_nr(struct pci_bus *bus)
1133 static inline int pci_proc_domain(struct pci_bus *bus)
1137 #endif /* CONFIG_PCI_DOMAINS */
1139 /* some architectures require additional setup to direct VGA traffic */
1140 typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
1141 unsigned int command_bits, u32 flags);
1142 extern void pci_register_set_vga_state(arch_set_vga_state_t func);
1144 #else /* CONFIG_PCI is not enabled */
1147 * If the system does not have PCI, clearly these return errors. Define
1148 * these as simple inline functions to avoid hair in drivers.
1151 #define _PCI_NOP(o, s, t) \
1152 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
1154 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
1156 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
1157 _PCI_NOP(o, word, u16 x) \
1158 _PCI_NOP(o, dword, u32 x)
1159 _PCI_NOP_ALL(read, *)
1160 _PCI_NOP_ALL(write,)
1162 static inline struct pci_dev *pci_get_device(unsigned int vendor,
1163 unsigned int device,
1164 struct pci_dev *from)
1169 static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
1170 unsigned int device,
1171 unsigned int ss_vendor,
1172 unsigned int ss_device,
1173 struct pci_dev *from)
1178 static inline struct pci_dev *pci_get_class(unsigned int class,
1179 struct pci_dev *from)
1184 #define pci_dev_present(ids) (0)
1185 #define no_pci_devices() (1)
1186 #define pci_dev_put(dev) do { } while (0)
1188 static inline void pci_set_master(struct pci_dev *dev)
1191 static inline int pci_enable_device(struct pci_dev *dev)
1196 static inline void pci_disable_device(struct pci_dev *dev)
1199 static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
1204 static inline int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
1209 static inline int pci_set_dma_max_seg_size(struct pci_dev *dev,
1215 static inline int pci_set_dma_seg_boundary(struct pci_dev *dev,
1221 static inline int pci_assign_resource(struct pci_dev *dev, int i)
1226 static inline int __pci_register_driver(struct pci_driver *drv,
1227 struct module *owner)
1232 static inline int pci_register_driver(struct pci_driver *drv)
1237 static inline void pci_unregister_driver(struct pci_driver *drv)
1240 static inline int pci_find_capability(struct pci_dev *dev, int cap)
1245 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
1251 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
1256 /* Power management related routines */
1257 static inline int pci_save_state(struct pci_dev *dev)
1262 static inline void pci_restore_state(struct pci_dev *dev)
1265 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
1270 static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable)
1275 static inline pci_power_t pci_choose_state(struct pci_dev *dev,
1281 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1287 static inline void pci_enable_ido(struct pci_dev *dev, unsigned long type)
1291 static inline void pci_disable_ido(struct pci_dev *dev, unsigned long type)
1295 static inline int pci_enable_obff(struct pci_dev *dev, unsigned long type)
1300 static inline void pci_disable_obff(struct pci_dev *dev)
1304 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
1309 static inline void pci_release_regions(struct pci_dev *dev)
1312 #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
1314 static inline void pci_block_cfg_access(struct pci_dev *dev)
1317 static inline int pci_block_cfg_access_in_atomic(struct pci_dev *dev)
1320 static inline void pci_unblock_cfg_access(struct pci_dev *dev)
1323 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
1326 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
1330 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
1334 static inline int pci_domain_nr(struct pci_bus *bus)
1337 #define dev_is_pci(d) (false)
1338 #define dev_is_pf(d) (false)
1339 #define dev_num_vf(d) (0)
1340 #endif /* CONFIG_PCI */
1342 /* Include architecture-dependent settings and functions */
1344 #include <asm/pci.h>
1346 #ifndef PCIBIOS_MAX_MEM_32
1347 #define PCIBIOS_MAX_MEM_32 (-1)
1350 /* these helpers provide future and backwards compatibility
1351 * for accessing popular PCI BAR info */
1352 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
1353 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
1354 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
1355 #define pci_resource_len(dev,bar) \
1356 ((pci_resource_start((dev), (bar)) == 0 && \
1357 pci_resource_end((dev), (bar)) == \
1358 pci_resource_start((dev), (bar))) ? 0 : \
1360 (pci_resource_end((dev), (bar)) - \
1361 pci_resource_start((dev), (bar)) + 1))
1363 /* Similar to the helpers above, these manipulate per-pci_dev
1364 * driver-specific data. They are really just a wrapper around
1365 * the generic device structure functions of these calls.
1367 static inline void *pci_get_drvdata(struct pci_dev *pdev)
1369 return dev_get_drvdata(&pdev->dev);
1372 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
1374 dev_set_drvdata(&pdev->dev, data);
1377 /* If you want to know what to call your pci_dev, ask this function.
1378 * Again, it's a wrapper around the generic device.
1380 static inline const char *pci_name(const struct pci_dev *pdev)
1382 return dev_name(&pdev->dev);
1386 /* Some archs don't want to expose struct resource to userland as-is
1387 * in sysfs and /proc
1389 #ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
1390 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
1391 const struct resource *rsrc, resource_size_t *start,
1392 resource_size_t *end)
1394 *start = rsrc->start;
1397 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
1401 * The world is not perfect and supplies us with broken PCI devices.
1402 * For at least a part of these bugs we need a work-around, so both
1403 * generic (drivers/pci/quirks.c) and per-architecture code can define
1404 * fixup hooks to be called for particular buggy devices.
1408 u16 vendor; /* You can use PCI_ANY_ID here of course */
1409 u16 device; /* You can use PCI_ANY_ID here of course */
1410 u32 class; /* You can use PCI_ANY_ID here too */
1411 unsigned int class_shift; /* should be 0, 8, 16 */
1412 void (*hook)(struct pci_dev *dev);
1415 enum pci_fixup_pass {
1416 pci_fixup_early, /* Before probing BARs */
1417 pci_fixup_header, /* After reading configuration header */
1418 pci_fixup_final, /* Final phase of device fixups */
1419 pci_fixup_enable, /* pci_enable_device() time */
1420 pci_fixup_resume, /* pci_device_resume() */
1421 pci_fixup_suspend, /* pci_device_suspend */
1422 pci_fixup_resume_early, /* pci_device_resume_early() */
1425 /* Anonymous variables would be nice... */
1426 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \
1427 class_shift, hook) \
1428 static const struct pci_fixup const __pci_fixup_##name __used \
1429 __attribute__((__section__(#section), aligned((sizeof(void *))))) \
1430 = { vendor, device, class, class_shift, hook };
1432 #define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class, \
1433 class_shift, hook) \
1434 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1435 vendor##device##hook, vendor, device, class, class_shift, hook)
1436 #define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class, \
1437 class_shift, hook) \
1438 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1439 vendor##device##hook, vendor, device, class, class_shift, hook)
1440 #define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class, \
1441 class_shift, hook) \
1442 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1443 vendor##device##hook, vendor, device, class, class_shift, hook)
1444 #define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class, \
1445 class_shift, hook) \
1446 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1447 vendor##device##hook, vendor, device, class, class_shift, hook)
1448 #define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class, \
1449 class_shift, hook) \
1450 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1451 resume##vendor##device##hook, vendor, device, class, \
1453 #define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class, \
1454 class_shift, hook) \
1455 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1456 resume_early##vendor##device##hook, vendor, device, \
1457 class, class_shift, hook)
1458 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class, \
1459 class_shift, hook) \
1460 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1461 suspend##vendor##device##hook, vendor, device, class, \
1464 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
1465 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1466 vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook)
1467 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
1468 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1469 vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook)
1470 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
1471 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1472 vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook)
1473 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
1474 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1475 vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook)
1476 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
1477 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1478 resume##vendor##device##hook, vendor, device, \
1479 PCI_ANY_ID, 0, hook)
1480 #define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
1481 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1482 resume_early##vendor##device##hook, vendor, device, \
1483 PCI_ANY_ID, 0, hook)
1484 #define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
1485 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1486 suspend##vendor##device##hook, vendor, device, \
1487 PCI_ANY_ID, 0, hook)
1489 #ifdef CONFIG_PCI_QUIRKS
1490 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
1492 static inline void pci_fixup_device(enum pci_fixup_pass pass,
1493 struct pci_dev *dev) {}
1496 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
1497 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
1498 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
1499 int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name);
1500 int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
1502 void pcim_iounmap_regions(struct pci_dev *pdev, int mask);
1504 extern int pci_pci_problems;
1505 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
1506 #define PCIPCI_TRITON 2
1507 #define PCIPCI_NATOMA 4
1508 #define PCIPCI_VIAETBF 8
1509 #define PCIPCI_VSFX 16
1510 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
1511 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
1513 extern unsigned long pci_cardbus_io_size;
1514 extern unsigned long pci_cardbus_mem_size;
1515 extern u8 __devinitdata pci_dfl_cache_line_size;
1516 extern u8 pci_cache_line_size;
1518 extern unsigned long pci_hotplug_io_size;
1519 extern unsigned long pci_hotplug_mem_size;
1521 /* Architecture specific versions may override these (weak) */
1522 int pcibios_add_platform_entries(struct pci_dev *dev);
1523 void pcibios_disable_device(struct pci_dev *dev);
1524 void pcibios_set_master(struct pci_dev *dev);
1525 int pcibios_set_pcie_reset_state(struct pci_dev *dev,
1526 enum pcie_reset_state state);
1528 #ifdef CONFIG_PCI_MMCONFIG
1529 extern void __init pci_mmcfg_early_init(void);
1530 extern void __init pci_mmcfg_late_init(void);
1532 static inline void pci_mmcfg_early_init(void) { }
1533 static inline void pci_mmcfg_late_init(void) { }
1536 int pci_ext_cfg_avail(struct pci_dev *dev);
1538 void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
1540 #ifdef CONFIG_PCI_IOV
1541 extern int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
1542 extern void pci_disable_sriov(struct pci_dev *dev);
1543 extern irqreturn_t pci_sriov_migration(struct pci_dev *dev);
1544 extern int pci_num_vf(struct pci_dev *dev);
1546 static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
1550 static inline void pci_disable_sriov(struct pci_dev *dev)
1553 static inline irqreturn_t pci_sriov_migration(struct pci_dev *dev)
1557 static inline int pci_num_vf(struct pci_dev *dev)
1563 #if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
1564 extern void pci_hp_create_module_link(struct pci_slot *pci_slot);
1565 extern void pci_hp_remove_module_link(struct pci_slot *pci_slot);
1569 * pci_pcie_cap - get the saved PCIe capability offset
1572 * PCIe capability offset is calculated at PCI device initialization
1573 * time and saved in the data structure. This function returns saved
1574 * PCIe capability offset. Using this instead of pci_find_capability()
1575 * reduces unnecessary search in the PCI configuration space. If you
1576 * need to calculate PCIe capability offset from raw device for some
1577 * reasons, please use pci_find_capability() instead.
1579 static inline int pci_pcie_cap(struct pci_dev *dev)
1581 return dev->pcie_cap;
1585 * pci_is_pcie - check if the PCI device is PCI Express capable
1588 * Retrun true if the PCI device is PCI Express capable, false otherwise.
1590 static inline bool pci_is_pcie(struct pci_dev *dev)
1592 return !!pci_pcie_cap(dev);
1595 void pci_request_acs(void);
1598 #define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */
1599 #define PCI_VPD_LRDT_ID(x) (x | PCI_VPD_LRDT)
1601 /* Large Resource Data Type Tag Item Names */
1602 #define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */
1603 #define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */
1604 #define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */
1606 #define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING)
1607 #define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA)
1608 #define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA)
1610 /* Small Resource Data Type Tag Item Names */
1611 #define PCI_VPD_STIN_END 0x78 /* End */
1613 #define PCI_VPD_SRDT_END PCI_VPD_STIN_END
1615 #define PCI_VPD_SRDT_TIN_MASK 0x78
1616 #define PCI_VPD_SRDT_LEN_MASK 0x07
1618 #define PCI_VPD_LRDT_TAG_SIZE 3
1619 #define PCI_VPD_SRDT_TAG_SIZE 1
1621 #define PCI_VPD_INFO_FLD_HDR_SIZE 3
1623 #define PCI_VPD_RO_KEYWORD_PARTNO "PN"
1624 #define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
1625 #define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
1626 #define PCI_VPD_RO_KEYWORD_CHKSUM "RV"
1629 * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length
1630 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
1632 * Returns the extracted Large Resource Data Type length.
1634 static inline u16 pci_vpd_lrdt_size(const u8 *lrdt)
1636 return (u16)lrdt[1] + ((u16)lrdt[2] << 8);
1640 * pci_vpd_srdt_size - Extracts the Small Resource Data Type length
1641 * @lrdt: Pointer to the beginning of the Small Resource Data Type tag
1643 * Returns the extracted Small Resource Data Type length.
1645 static inline u8 pci_vpd_srdt_size(const u8 *srdt)
1647 return (*srdt) & PCI_VPD_SRDT_LEN_MASK;
1651 * pci_vpd_info_field_size - Extracts the information field length
1652 * @lrdt: Pointer to the beginning of an information field header
1654 * Returns the extracted information field length.
1656 static inline u8 pci_vpd_info_field_size(const u8 *info_field)
1658 return info_field[2];
1662 * pci_vpd_find_tag - Locates the Resource Data Type tag provided
1663 * @buf: Pointer to buffered vpd data
1664 * @off: The offset into the buffer at which to begin the search
1665 * @len: The length of the vpd buffer
1666 * @rdt: The Resource Data Type to search for
1668 * Returns the index where the Resource Data Type was found or
1669 * -ENOENT otherwise.
1671 int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt);
1674 * pci_vpd_find_info_keyword - Locates an information field keyword in the VPD
1675 * @buf: Pointer to buffered vpd data
1676 * @off: The offset into the buffer at which to begin the search
1677 * @len: The length of the buffer area, relative to off, in which to search
1678 * @kw: The keyword to search for
1680 * Returns the index where the information field keyword was found or
1681 * -ENOENT otherwise.
1683 int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
1684 unsigned int len, const char *kw);
1686 /* PCI <-> OF binding helpers */
1689 extern void pci_set_of_node(struct pci_dev *dev);
1690 extern void pci_release_of_node(struct pci_dev *dev);
1691 extern void pci_set_bus_of_node(struct pci_bus *bus);
1692 extern void pci_release_bus_of_node(struct pci_bus *bus);
1694 /* Arch may override this (weak) */
1695 extern struct device_node * __weak pcibios_get_phb_of_node(struct pci_bus *bus);
1697 static inline struct device_node *
1698 pci_device_to_OF_node(const struct pci_dev *pdev)
1700 return pdev ? pdev->dev.of_node : NULL;
1703 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
1705 return bus ? bus->dev.of_node : NULL;
1708 #else /* CONFIG_OF */
1709 static inline void pci_set_of_node(struct pci_dev *dev) { }
1710 static inline void pci_release_of_node(struct pci_dev *dev) { }
1711 static inline void pci_set_bus_of_node(struct pci_bus *bus) { }
1712 static inline void pci_release_bus_of_node(struct pci_bus *bus) { }
1713 #endif /* CONFIG_OF */
1716 static inline struct eeh_dev *pci_dev_to_eeh_dev(struct pci_dev *pdev)
1718 return pdev->dev.archdata.edev;
1723 * pci_find_upstream_pcie_bridge - find upstream PCIe-to-PCI bridge of a device
1724 * @pdev: the PCI device
1726 * if the device is PCIE, return NULL
1727 * if the device isn't connected to a PCIe bridge (that is its parent is a
1728 * legacy PCI bridge and the bridge is directly connected to bus 0), return its
1731 struct pci_dev *pci_find_upstream_pcie_bridge(struct pci_dev *pdev);
1733 #endif /* __KERNEL__ */
1734 #endif /* LINUX_PCI_H */