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 the pci register defines */
23 #include <linux/pci_regs.h>
25 /* Include the ID list */
26 #include <linux/pci_ids.h>
29 * The PCI interface treats multi-function devices as independent
30 * devices. The slot/function address of each device is encoded
31 * in a single byte as follows:
36 #define PCI_DEVFN(slot,func) ((((slot) & 0x1f) << 3) | ((func) & 0x07))
37 #define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f)
38 #define PCI_FUNC(devfn) ((devfn) & 0x07)
40 /* Ioctls for /proc/bus/pci/X/Y nodes. */
41 #define PCIIOC_BASE ('P' << 24 | 'C' << 16 | 'I' << 8)
42 #define PCIIOC_CONTROLLER (PCIIOC_BASE | 0x00) /* Get controller for PCI device. */
43 #define PCIIOC_MMAP_IS_IO (PCIIOC_BASE | 0x01) /* Set mmap state to I/O space. */
44 #define PCIIOC_MMAP_IS_MEM (PCIIOC_BASE | 0x02) /* Set mmap state to MEM space. */
45 #define PCIIOC_WRITE_COMBINE (PCIIOC_BASE | 0x03) /* Enable/disable write-combining. */
49 #include <linux/types.h>
50 #include <linux/config.h>
51 #include <linux/ioport.h>
52 #include <linux/list.h>
53 #include <linux/errno.h>
54 #include <linux/device.h>
56 /* File state for mmap()s on /proc/bus/pci/X/Y */
62 /* This defines the direction arg to the DMA mapping routines. */
63 #define PCI_DMA_BIDIRECTIONAL 0
64 #define PCI_DMA_TODEVICE 1
65 #define PCI_DMA_FROMDEVICE 2
66 #define PCI_DMA_NONE 3
68 #define DEVICE_COUNT_COMPATIBLE 4
69 #define DEVICE_COUNT_RESOURCE 12
71 typedef int __bitwise pci_power_t;
73 #define PCI_D0 ((pci_power_t __force) 0)
74 #define PCI_D1 ((pci_power_t __force) 1)
75 #define PCI_D2 ((pci_power_t __force) 2)
76 #define PCI_D3hot ((pci_power_t __force) 3)
77 #define PCI_D3cold ((pci_power_t __force) 4)
78 #define PCI_UNKNOWN ((pci_power_t __force) 5)
79 #define PCI_POWER_ERROR ((pci_power_t __force) -1)
81 /** The pci_channel state describes connectivity between the CPU and
82 * the pci device. If some PCI bus between here and the pci device
83 * has crashed or locked up, this info is reflected here.
85 typedef unsigned int __bitwise pci_channel_state_t;
87 enum pci_channel_state {
88 /* I/O channel is in normal state */
89 pci_channel_io_normal = (__force pci_channel_state_t) 1,
91 /* I/O to channel is blocked */
92 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
94 /* PCI card is dead */
95 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
99 * The pci_dev structure is used to describe PCI devices.
102 struct list_head global_list; /* node in list of all PCI devices */
103 struct list_head bus_list; /* node in per-bus list */
104 struct pci_bus *bus; /* bus this device is on */
105 struct pci_bus *subordinate; /* bus this device bridges to */
107 void *sysdata; /* hook for sys-specific extension */
108 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
110 unsigned int devfn; /* encoded device & function index */
111 unsigned short vendor;
112 unsigned short device;
113 unsigned short subsystem_vendor;
114 unsigned short subsystem_device;
115 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
116 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
117 u8 rom_base_reg; /* which config register controls the ROM */
118 u8 pin; /* which interrupt pin this device uses */
120 struct pci_driver *driver; /* which driver has allocated this device */
121 u64 dma_mask; /* Mask of the bits of bus address this
122 device implements. Normally this is
123 0xffffffff. You only need to change
124 this if your device has broken DMA
125 or supports 64-bit transfers. */
127 pci_power_t current_state; /* Current operating state. In ACPI-speak,
128 this is D0-D3, D0 being fully functional,
131 pci_channel_state_t error_state; /* current connectivity state */
132 struct device dev; /* Generic device interface */
134 /* device is compatible with these IDs */
135 unsigned short vendor_compatible[DEVICE_COUNT_COMPATIBLE];
136 unsigned short device_compatible[DEVICE_COUNT_COMPATIBLE];
138 int cfg_size; /* Size of configuration space */
141 * Instead of touching interrupt line and base address registers
142 * directly, use the values stored here. They might be different!
145 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
147 /* These fields are used by common fixups */
148 unsigned int transparent:1; /* Transparent PCI bridge */
149 unsigned int multifunction:1;/* Part of multi-function device */
150 /* keep track of device state */
151 unsigned int is_enabled:1; /* pci_enable_device has been called */
152 unsigned int is_busmaster:1; /* device is busmaster */
153 unsigned int no_msi:1; /* device may not use msi */
154 unsigned int block_ucfg_access:1; /* userspace config space access is blocked */
156 u32 saved_config_space[16]; /* config space saved at suspend time */
157 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
158 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
159 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
162 #define pci_dev_g(n) list_entry(n, struct pci_dev, global_list)
163 #define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
164 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
165 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
168 * For PCI devices, the region numbers are assigned this way:
170 * 0-5 standard PCI regions
172 * 7-10 bridges: address space assigned to buses behind the bridge
175 #define PCI_ROM_RESOURCE 6
176 #define PCI_BRIDGE_RESOURCES 7
177 #define PCI_NUM_RESOURCES 11
179 #ifndef PCI_BUS_NUM_RESOURCES
180 #define PCI_BUS_NUM_RESOURCES 8
183 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
186 struct list_head node; /* node in list of buses */
187 struct pci_bus *parent; /* parent bus this bridge is on */
188 struct list_head children; /* list of child buses */
189 struct list_head devices; /* list of devices on this bus */
190 struct pci_dev *self; /* bridge device as seen by parent */
191 struct resource *resource[PCI_BUS_NUM_RESOURCES];
192 /* address space routed to this bus */
194 struct pci_ops *ops; /* configuration access functions */
195 void *sysdata; /* hook for sys-specific extension */
196 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
198 unsigned char number; /* bus number */
199 unsigned char primary; /* number of primary bridge */
200 unsigned char secondary; /* number of secondary bridge */
201 unsigned char subordinate; /* max number of subordinate buses */
205 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
207 struct device *bridge;
208 struct class_device class_dev;
209 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
210 struct bin_attribute *legacy_mem; /* legacy mem */
213 #define pci_bus_b(n) list_entry(n, struct pci_bus, node)
214 #define to_pci_bus(n) container_of(n, struct pci_bus, class_dev)
217 * Error values that may be returned by PCI functions.
219 #define PCIBIOS_SUCCESSFUL 0x00
220 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
221 #define PCIBIOS_BAD_VENDOR_ID 0x83
222 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
223 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
224 #define PCIBIOS_SET_FAILED 0x88
225 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
227 /* Low-level architecture-dependent routines */
230 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
231 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
235 int (*read)(unsigned int domain, unsigned int bus, unsigned int devfn,
236 int reg, int len, u32 *val);
237 int (*write)(unsigned int domain, unsigned int bus, unsigned int devfn,
238 int reg, int len, u32 val);
241 extern struct pci_raw_ops *raw_pci_ops;
243 struct pci_bus_region {
249 spinlock_t lock; /* protects list, index */
250 struct list_head list; /* for IDs added at runtime */
251 unsigned int use_driver_data:1; /* pci_driver->driver_data is used */
254 /* ---------------------------------------------------------------- */
255 /** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
256 * a set fof callbacks in struct pci_error_handlers, then that device driver
257 * will be notified of PCI bus errors, and will be driven to recovery
258 * when an error occurs.
261 typedef unsigned int __bitwise pci_ers_result_t;
263 enum pci_ers_result {
264 /* no result/none/not supported in device driver */
265 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
267 /* Device driver can recover without slot reset */
268 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
270 /* Device driver wants slot to be reset. */
271 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
273 /* Device has completely failed, is unrecoverable */
274 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
276 /* Device driver is fully recovered and operational */
277 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
280 /* PCI bus error event callbacks */
281 struct pci_error_handlers
283 /* PCI bus error detected on this device */
284 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
285 enum pci_channel_state error);
287 /* MMIO has been re-enabled, but not DMA */
288 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
290 /* PCI Express link has been reset */
291 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
293 /* PCI slot has been reset */
294 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
296 /* Device driver may resume normal operations */
297 void (*resume)(struct pci_dev *dev);
300 /* ---------------------------------------------------------------- */
304 struct list_head node;
306 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
307 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
308 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
309 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
310 int (*resume) (struct pci_dev *dev); /* Device woken up */
311 int (*enable_wake) (struct pci_dev *dev, pci_power_t state, int enable); /* Enable wake event */
312 void (*shutdown) (struct pci_dev *dev);
314 struct pci_error_handlers *err_handler;
315 struct device_driver driver;
316 struct pci_dynids dynids;
319 #define to_pci_driver(drv) container_of(drv,struct pci_driver, driver)
322 * PCI_DEVICE - macro used to describe a specific pci device
323 * @vend: the 16 bit PCI Vendor ID
324 * @dev: the 16 bit PCI Device ID
326 * This macro is used to create a struct pci_device_id that matches a
327 * specific device. The subvendor and subdevice fields will be set to
330 #define PCI_DEVICE(vend,dev) \
331 .vendor = (vend), .device = (dev), \
332 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
335 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
336 * @dev_class: the class, subclass, prog-if triple for this device
337 * @dev_class_mask: the class mask for this device
339 * This macro is used to create a struct pci_device_id that matches a
340 * specific PCI class. The vendor, device, subvendor, and subdevice
341 * fields will be set to PCI_ANY_ID.
343 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
344 .class = (dev_class), .class_mask = (dev_class_mask), \
345 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
346 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
349 * pci_module_init is obsolete, this stays here till we fix up all usages of it
352 #define pci_module_init pci_register_driver
354 /* these external functions are only available when PCI support is enabled */
357 extern struct bus_type pci_bus_type;
359 /* Do NOT directly access these two variables, unless you are arch specific pci
360 * code, or pci core code. */
361 extern struct list_head pci_root_buses; /* list of all known PCI buses */
362 extern struct list_head pci_devices; /* list of all devices */
364 void pcibios_fixup_bus(struct pci_bus *);
365 int pcibios_enable_device(struct pci_dev *, int mask);
366 char *pcibios_setup (char *str);
368 /* Used only when drivers/pci/setup.c is used */
369 void pcibios_align_resource(void *, struct resource *,
370 unsigned long, unsigned long);
371 void pcibios_update_irq(struct pci_dev *, int irq);
373 /* Generic PCI functions used internally */
375 extern struct pci_bus *pci_find_bus(int domain, int busnr);
376 void pci_bus_add_devices(struct pci_bus *bus);
377 struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus, struct pci_ops *ops, void *sysdata);
378 static inline struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata)
380 struct pci_bus *root_bus;
381 root_bus = pci_scan_bus_parented(NULL, bus, ops, sysdata);
383 pci_bus_add_devices(root_bus);
386 struct pci_bus *pci_create_bus(struct device *parent, int bus, struct pci_ops *ops, void *sysdata);
387 struct pci_bus * pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, int busnr);
388 int pci_scan_slot(struct pci_bus *bus, int devfn);
389 struct pci_dev * pci_scan_single_device(struct pci_bus *bus, int devfn);
390 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
391 unsigned int pci_scan_child_bus(struct pci_bus *bus);
392 void pci_bus_add_device(struct pci_dev *dev);
393 void pci_read_bridge_bases(struct pci_bus *child);
394 struct resource *pci_find_parent_resource(const struct pci_dev *dev, struct resource *res);
395 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
396 extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
397 extern void pci_dev_put(struct pci_dev *dev);
398 extern void pci_remove_bus(struct pci_bus *b);
399 extern void pci_remove_bus_device(struct pci_dev *dev);
400 void pci_setup_cardbus(struct pci_bus *bus);
402 /* Generic PCI functions exported to card drivers */
404 struct pci_dev *pci_find_device (unsigned int vendor, unsigned int device, const struct pci_dev *from);
405 struct pci_dev *pci_find_device_reverse (unsigned int vendor, unsigned int device, const struct pci_dev *from);
406 struct pci_dev *pci_find_slot (unsigned int bus, unsigned int devfn);
407 int pci_find_capability (struct pci_dev *dev, int cap);
408 int pci_find_next_capability (struct pci_dev *dev, u8 pos, int cap);
409 struct pci_bus * pci_find_next_bus(const struct pci_bus *from);
411 struct pci_dev *pci_get_device (unsigned int vendor, unsigned int device, struct pci_dev *from);
412 struct pci_dev *pci_get_subsys (unsigned int vendor, unsigned int device,
413 unsigned int ss_vendor, unsigned int ss_device,
414 struct pci_dev *from);
415 struct pci_dev *pci_get_slot (struct pci_bus *bus, unsigned int devfn);
416 struct pci_dev *pci_get_class (unsigned int class, struct pci_dev *from);
417 int pci_dev_present(const struct pci_device_id *ids);
419 int pci_bus_read_config_byte (struct pci_bus *bus, unsigned int devfn, int where, u8 *val);
420 int pci_bus_read_config_word (struct pci_bus *bus, unsigned int devfn, int where, u16 *val);
421 int pci_bus_read_config_dword (struct pci_bus *bus, unsigned int devfn, int where, u32 *val);
422 int pci_bus_write_config_byte (struct pci_bus *bus, unsigned int devfn, int where, u8 val);
423 int pci_bus_write_config_word (struct pci_bus *bus, unsigned int devfn, int where, u16 val);
424 int pci_bus_write_config_dword (struct pci_bus *bus, unsigned int devfn, int where, u32 val);
426 static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val)
428 return pci_bus_read_config_byte (dev->bus, dev->devfn, where, val);
430 static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val)
432 return pci_bus_read_config_word (dev->bus, dev->devfn, where, val);
434 static inline int pci_read_config_dword(struct pci_dev *dev, int where, u32 *val)
436 return pci_bus_read_config_dword (dev->bus, dev->devfn, where, val);
438 static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val)
440 return pci_bus_write_config_byte (dev->bus, dev->devfn, where, val);
442 static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val)
444 return pci_bus_write_config_word (dev->bus, dev->devfn, where, val);
446 static inline int pci_write_config_dword(struct pci_dev *dev, int where, u32 val)
448 return pci_bus_write_config_dword (dev->bus, dev->devfn, where, val);
451 int pci_enable_device(struct pci_dev *dev);
452 int pci_enable_device_bars(struct pci_dev *dev, int mask);
453 void pci_disable_device(struct pci_dev *dev);
454 void pci_set_master(struct pci_dev *dev);
455 #define HAVE_PCI_SET_MWI
456 int pci_set_mwi(struct pci_dev *dev);
457 void pci_clear_mwi(struct pci_dev *dev);
458 void pci_intx(struct pci_dev *dev, int enable);
459 int pci_set_dma_mask(struct pci_dev *dev, u64 mask);
460 int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask);
461 void pci_update_resource(struct pci_dev *dev, struct resource *res, int resno);
462 int pci_assign_resource(struct pci_dev *dev, int i);
463 void pci_restore_bars(struct pci_dev *dev);
465 /* ROM control related routines */
466 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
467 void __iomem __must_check *pci_map_rom_copy(struct pci_dev *pdev, size_t *size);
468 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
469 void pci_remove_rom(struct pci_dev *pdev);
471 /* Power management related routines */
472 int pci_save_state(struct pci_dev *dev);
473 int pci_restore_state(struct pci_dev *dev);
474 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
475 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
476 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable);
478 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
479 void pci_bus_assign_resources(struct pci_bus *bus);
480 void pci_bus_size_bridges(struct pci_bus *bus);
481 int pci_claim_resource(struct pci_dev *, int);
482 void pci_assign_unassigned_resources(void);
483 void pdev_enable_device(struct pci_dev *);
484 void pdev_sort_resources(struct pci_dev *, struct resource_list *);
485 void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
486 int (*)(struct pci_dev *, u8, u8));
487 #define HAVE_PCI_REQ_REGIONS 2
488 int pci_request_regions(struct pci_dev *, char *);
489 void pci_release_regions(struct pci_dev *);
490 int pci_request_region(struct pci_dev *, int, char *);
491 void pci_release_region(struct pci_dev *, int);
493 /* drivers/pci/bus.c */
494 int pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res,
495 unsigned long size, unsigned long align,
496 unsigned long min, unsigned int type_mask,
497 void (*alignf)(void *, struct resource *,
498 unsigned long, unsigned long),
500 void pci_enable_bridges(struct pci_bus *bus);
502 /* Proper probing supporting hot-pluggable devices */
503 int __pci_register_driver(struct pci_driver *, struct module *);
504 static inline int pci_register_driver(struct pci_driver *driver)
506 return __pci_register_driver(driver, THIS_MODULE);
509 void pci_unregister_driver(struct pci_driver *);
510 void pci_remove_behind_bridge(struct pci_dev *);
511 struct pci_driver *pci_dev_driver(const struct pci_dev *);
512 const struct pci_device_id *pci_match_device(struct pci_driver *drv, struct pci_dev *dev);
513 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, struct pci_dev *dev);
514 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max, int pass);
516 void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *),
518 int pci_cfg_space_size(struct pci_dev *dev);
520 /* kmem_cache style wrapper around pci_alloc_consistent() */
522 #include <linux/dmapool.h>
524 #define pci_pool dma_pool
525 #define pci_pool_create(name, pdev, size, align, allocation) \
526 dma_pool_create(name, &pdev->dev, size, align, allocation)
527 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
528 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
529 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
531 enum pci_dma_burst_strategy {
532 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
533 strategy_parameter is N/A */
534 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
536 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
537 strategy_parameter byte boundaries */
540 #if defined(CONFIG_ISA) || defined(CONFIG_EISA)
541 extern struct pci_dev *isa_bridge;
545 u16 vector; /* kernel uses to write allocated vector */
546 u16 entry; /* driver uses to specify entry, OS writes */
549 #ifndef CONFIG_PCI_MSI
550 static inline void pci_scan_msi_device(struct pci_dev *dev) {}
551 static inline int pci_enable_msi(struct pci_dev *dev) {return -1;}
552 static inline void pci_disable_msi(struct pci_dev *dev) {}
553 static inline int pci_enable_msix(struct pci_dev* dev,
554 struct msix_entry *entries, int nvec) {return -1;}
555 static inline void pci_disable_msix(struct pci_dev *dev) {}
556 static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev) {}
558 extern void pci_scan_msi_device(struct pci_dev *dev);
559 extern int pci_enable_msi(struct pci_dev *dev);
560 extern void pci_disable_msi(struct pci_dev *dev);
561 extern int pci_enable_msix(struct pci_dev* dev,
562 struct msix_entry *entries, int nvec);
563 extern void pci_disable_msix(struct pci_dev *dev);
564 extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
567 extern void pci_block_user_cfg_access(struct pci_dev *dev);
568 extern void pci_unblock_user_cfg_access(struct pci_dev *dev);
571 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
572 * a PCI domain is defined to be a set of PCI busses which share
573 * configuration space.
575 #ifndef CONFIG_PCI_DOMAINS
576 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
577 static inline int pci_proc_domain(struct pci_bus *bus)
583 #else /* CONFIG_PCI is not enabled */
586 * If the system does not have PCI, clearly these return errors. Define
587 * these as simple inline functions to avoid hair in drivers.
590 #define _PCI_NOP(o,s,t) \
591 static inline int pci_##o##_config_##s (struct pci_dev *dev, int where, t val) \
592 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
593 #define _PCI_NOP_ALL(o,x) _PCI_NOP(o,byte,u8 x) \
594 _PCI_NOP(o,word,u16 x) \
595 _PCI_NOP(o,dword,u32 x)
596 _PCI_NOP_ALL(read, *)
599 static inline struct pci_dev *pci_find_device(unsigned int vendor, unsigned int device, const struct pci_dev *from)
602 static inline struct pci_dev *pci_find_slot(unsigned int bus, unsigned int devfn)
605 static inline struct pci_dev *pci_get_device (unsigned int vendor, unsigned int device, struct pci_dev *from)
608 static inline struct pci_dev *pci_get_subsys (unsigned int vendor, unsigned int device,
609 unsigned int ss_vendor, unsigned int ss_device, struct pci_dev *from)
612 static inline struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from)
615 #define pci_dev_present(ids) (0)
616 #define pci_dev_put(dev) do { } while (0)
618 static inline void pci_set_master(struct pci_dev *dev) { }
619 static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
620 static inline void pci_disable_device(struct pci_dev *dev) { }
621 static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask) { return -EIO; }
622 static inline int pci_assign_resource(struct pci_dev *dev, int i) { return -EBUSY;}
623 static inline int __pci_register_driver(struct pci_driver *drv, struct module *owner) { return 0;}
624 static inline int pci_register_driver(struct pci_driver *drv) { return 0;}
625 static inline void pci_unregister_driver(struct pci_driver *drv) { }
626 static inline int pci_find_capability (struct pci_dev *dev, int cap) {return 0; }
627 static inline int pci_find_next_capability (struct pci_dev *dev, u8 post, int cap) { return 0; }
628 static inline const struct pci_device_id *pci_match_device(const struct pci_device_id *ids, const struct pci_dev *dev) { return NULL; }
630 /* Power management related routines */
631 static inline int pci_save_state(struct pci_dev *dev) { return 0; }
632 static inline int pci_restore_state(struct pci_dev *dev) { return 0; }
633 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state) { return 0; }
634 static inline pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state) { return PCI_D0; }
635 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable) { return 0; }
637 #define isa_bridge ((struct pci_dev *)NULL)
639 #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
641 static inline void pci_block_user_cfg_access(struct pci_dev *dev) { }
642 static inline void pci_unblock_user_cfg_access(struct pci_dev *dev) { }
644 #endif /* CONFIG_PCI */
646 /* Include architecture-dependent settings and functions */
650 /* these helpers provide future and backwards compatibility
651 * for accessing popular PCI BAR info */
652 #define pci_resource_start(dev,bar) ((dev)->resource[(bar)].start)
653 #define pci_resource_end(dev,bar) ((dev)->resource[(bar)].end)
654 #define pci_resource_flags(dev,bar) ((dev)->resource[(bar)].flags)
655 #define pci_resource_len(dev,bar) \
656 ((pci_resource_start((dev),(bar)) == 0 && \
657 pci_resource_end((dev),(bar)) == \
658 pci_resource_start((dev),(bar))) ? 0 : \
660 (pci_resource_end((dev),(bar)) - \
661 pci_resource_start((dev),(bar)) + 1))
663 /* Similar to the helpers above, these manipulate per-pci_dev
664 * driver-specific data. They are really just a wrapper around
665 * the generic device structure functions of these calls.
667 static inline void *pci_get_drvdata (struct pci_dev *pdev)
669 return dev_get_drvdata(&pdev->dev);
672 static inline void pci_set_drvdata (struct pci_dev *pdev, void *data)
674 dev_set_drvdata(&pdev->dev, data);
677 /* If you want to know what to call your pci_dev, ask this function.
678 * Again, it's a wrapper around the generic device.
680 static inline char *pci_name(struct pci_dev *pdev)
682 return pdev->dev.bus_id;
686 /* Some archs don't want to expose struct resource to userland as-is
689 #ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
690 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
691 const struct resource *rsrc, u64 *start, u64 *end)
693 *start = rsrc->start;
696 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
700 * The world is not perfect and supplies us with broken PCI devices.
701 * For at least a part of these bugs we need a work-around, so both
702 * generic (drivers/pci/quirks.c) and per-architecture code can define
703 * fixup hooks to be called for particular buggy devices.
707 u16 vendor, device; /* You can use PCI_ANY_ID here of course */
708 void (*hook)(struct pci_dev *dev);
711 enum pci_fixup_pass {
712 pci_fixup_early, /* Before probing BARs */
713 pci_fixup_header, /* After reading configuration header */
714 pci_fixup_final, /* Final phase of device fixups */
715 pci_fixup_enable, /* pci_enable_device() time */
718 /* Anonymous variables would be nice... */
719 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook) \
720 static const struct pci_fixup __pci_fixup_##name __attribute_used__ \
721 __attribute__((__section__(#section))) = { vendor, device, hook };
722 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
723 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
724 vendor##device##hook, vendor, device, hook)
725 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
726 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
727 vendor##device##hook, vendor, device, hook)
728 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
729 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
730 vendor##device##hook, vendor, device, hook)
731 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
732 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
733 vendor##device##hook, vendor, device, hook)
736 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
738 extern int pci_pci_problems;
739 #define PCIPCI_FAIL 1
740 #define PCIPCI_TRITON 2
741 #define PCIPCI_NATOMA 4
742 #define PCIPCI_VIAETBF 8
743 #define PCIPCI_VSFX 16
744 #define PCIPCI_ALIMAGIK 32
746 #endif /* __KERNEL__ */
747 #endif /* LINUX_PCI_H */