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 the pci register defines */
21 #include <linux/pci_regs.h>
23 /* Include the ID list */
24 #include <linux/pci_ids.h>
27 * The PCI interface treats multi-function devices as independent
28 * devices. The slot/function address of each device is encoded
29 * in a single byte as follows:
34 #define PCI_DEVFN(slot,func) ((((slot) & 0x1f) << 3) | ((func) & 0x07))
35 #define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f)
36 #define PCI_FUNC(devfn) ((devfn) & 0x07)
38 /* Ioctls for /proc/bus/pci/X/Y nodes. */
39 #define PCIIOC_BASE ('P' << 24 | 'C' << 16 | 'I' << 8)
40 #define PCIIOC_CONTROLLER (PCIIOC_BASE | 0x00) /* Get controller for PCI device. */
41 #define PCIIOC_MMAP_IS_IO (PCIIOC_BASE | 0x01) /* Set mmap state to I/O space. */
42 #define PCIIOC_MMAP_IS_MEM (PCIIOC_BASE | 0x02) /* Set mmap state to MEM space. */
43 #define PCIIOC_WRITE_COMBINE (PCIIOC_BASE | 0x03) /* Enable/disable write-combining. */
47 #include <linux/mod_devicetable.h>
49 #include <linux/types.h>
50 #include <linux/ioport.h>
51 #include <linux/list.h>
52 #include <linux/errno.h>
53 #include <linux/device.h>
55 /* File state for mmap()s on /proc/bus/pci/X/Y */
61 /* This defines the direction arg to the DMA mapping routines. */
62 #define PCI_DMA_BIDIRECTIONAL 0
63 #define PCI_DMA_TODEVICE 1
64 #define PCI_DMA_FROMDEVICE 2
65 #define PCI_DMA_NONE 3
67 #define DEVICE_COUNT_COMPATIBLE 4
68 #define DEVICE_COUNT_RESOURCE 12
70 typedef int __bitwise pci_power_t;
72 #define PCI_D0 ((pci_power_t __force) 0)
73 #define PCI_D1 ((pci_power_t __force) 1)
74 #define PCI_D2 ((pci_power_t __force) 2)
75 #define PCI_D3hot ((pci_power_t __force) 3)
76 #define PCI_D3cold ((pci_power_t __force) 4)
77 #define PCI_UNKNOWN ((pci_power_t __force) 5)
78 #define PCI_POWER_ERROR ((pci_power_t __force) -1)
80 /** The pci_channel state describes connectivity between the CPU and
81 * the pci device. If some PCI bus between here and the pci device
82 * has crashed or locked up, this info is reflected here.
84 typedef unsigned int __bitwise pci_channel_state_t;
86 enum pci_channel_state {
87 /* I/O channel is in normal state */
88 pci_channel_io_normal = (__force pci_channel_state_t) 1,
90 /* I/O to channel is blocked */
91 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
93 /* PCI card is dead */
94 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
97 typedef unsigned short __bitwise pci_bus_flags_t;
99 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
102 struct pci_cap_saved_state {
103 struct hlist_node next;
109 * The pci_dev structure is used to describe PCI devices.
112 struct list_head global_list; /* node in list of all PCI devices */
113 struct list_head bus_list; /* node in per-bus list */
114 struct pci_bus *bus; /* bus this device is on */
115 struct pci_bus *subordinate; /* bus this device bridges to */
117 void *sysdata; /* hook for sys-specific extension */
118 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
120 unsigned int devfn; /* encoded device & function index */
121 unsigned short vendor;
122 unsigned short device;
123 unsigned short subsystem_vendor;
124 unsigned short subsystem_device;
125 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
126 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
127 u8 rom_base_reg; /* which config register controls the ROM */
128 u8 pin; /* which interrupt pin this device uses */
130 struct pci_driver *driver; /* which driver has allocated this device */
131 u64 dma_mask; /* Mask of the bits of bus address this
132 device implements. Normally this is
133 0xffffffff. You only need to change
134 this if your device has broken DMA
135 or supports 64-bit transfers. */
137 pci_power_t current_state; /* Current operating state. In ACPI-speak,
138 this is D0-D3, D0 being fully functional,
141 pci_channel_state_t error_state; /* current connectivity state */
142 struct device dev; /* Generic device interface */
144 /* device is compatible with these IDs */
145 unsigned short vendor_compatible[DEVICE_COUNT_COMPATIBLE];
146 unsigned short device_compatible[DEVICE_COUNT_COMPATIBLE];
148 int cfg_size; /* Size of configuration space */
151 * Instead of touching interrupt line and base address registers
152 * directly, use the values stored here. They might be different!
155 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
157 /* These fields are used by common fixups */
158 unsigned int transparent:1; /* Transparent PCI bridge */
159 unsigned int multifunction:1;/* Part of multi-function device */
160 /* keep track of device state */
161 unsigned int is_enabled:1; /* pci_enable_device has been called */
162 unsigned int is_busmaster:1; /* device is busmaster */
163 unsigned int no_msi:1; /* device may not use msi */
164 unsigned int block_ucfg_access:1; /* userspace config space access is blocked */
165 unsigned int broken_parity_status:1; /* Device generates false positive parity */
166 unsigned int msi_enabled:1;
167 unsigned int msix_enabled:1;
169 u32 saved_config_space[16]; /* config space saved at suspend time */
170 struct hlist_head saved_cap_space;
171 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
172 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
173 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
176 #define pci_dev_g(n) list_entry(n, struct pci_dev, global_list)
177 #define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
178 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
179 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
181 static inline struct pci_cap_saved_state *pci_find_saved_cap(
182 struct pci_dev *pci_dev,char cap)
184 struct pci_cap_saved_state *tmp;
185 struct hlist_node *pos;
187 hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) {
188 if (tmp->cap_nr == cap)
194 static inline void pci_add_saved_cap(struct pci_dev *pci_dev,
195 struct pci_cap_saved_state *new_cap)
197 hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space);
200 static inline void pci_remove_saved_cap(struct pci_cap_saved_state *cap)
202 hlist_del(&cap->next);
206 * For PCI devices, the region numbers are assigned this way:
208 * 0-5 standard PCI regions
210 * 7-10 bridges: address space assigned to buses behind the bridge
213 #define PCI_ROM_RESOURCE 6
214 #define PCI_BRIDGE_RESOURCES 7
215 #define PCI_NUM_RESOURCES 11
217 #ifndef PCI_BUS_NUM_RESOURCES
218 #define PCI_BUS_NUM_RESOURCES 8
221 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
224 struct list_head node; /* node in list of buses */
225 struct pci_bus *parent; /* parent bus this bridge is on */
226 struct list_head children; /* list of child buses */
227 struct list_head devices; /* list of devices on this bus */
228 struct pci_dev *self; /* bridge device as seen by parent */
229 struct resource *resource[PCI_BUS_NUM_RESOURCES];
230 /* address space routed to this bus */
232 struct pci_ops *ops; /* configuration access functions */
233 void *sysdata; /* hook for sys-specific extension */
234 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
236 unsigned char number; /* bus number */
237 unsigned char primary; /* number of primary bridge */
238 unsigned char secondary; /* number of secondary bridge */
239 unsigned char subordinate; /* max number of subordinate buses */
243 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
244 pci_bus_flags_t bus_flags; /* Inherited by child busses */
245 struct device *bridge;
246 struct class_device class_dev;
247 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
248 struct bin_attribute *legacy_mem; /* legacy mem */
251 #define pci_bus_b(n) list_entry(n, struct pci_bus, node)
252 #define to_pci_bus(n) container_of(n, struct pci_bus, class_dev)
255 * Error values that may be returned by PCI functions.
257 #define PCIBIOS_SUCCESSFUL 0x00
258 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
259 #define PCIBIOS_BAD_VENDOR_ID 0x83
260 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
261 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
262 #define PCIBIOS_SET_FAILED 0x88
263 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
265 /* Low-level architecture-dependent routines */
268 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
269 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
273 int (*read)(unsigned int domain, unsigned int bus, unsigned int devfn,
274 int reg, int len, u32 *val);
275 int (*write)(unsigned int domain, unsigned int bus, unsigned int devfn,
276 int reg, int len, u32 val);
279 extern struct pci_raw_ops *raw_pci_ops;
281 struct pci_bus_region {
287 spinlock_t lock; /* protects list, index */
288 struct list_head list; /* for IDs added at runtime */
289 unsigned int use_driver_data:1; /* pci_driver->driver_data is used */
292 /* ---------------------------------------------------------------- */
293 /** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
294 * a set fof callbacks in struct pci_error_handlers, then that device driver
295 * will be notified of PCI bus errors, and will be driven to recovery
296 * when an error occurs.
299 typedef unsigned int __bitwise pci_ers_result_t;
301 enum pci_ers_result {
302 /* no result/none/not supported in device driver */
303 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
305 /* Device driver can recover without slot reset */
306 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
308 /* Device driver wants slot to be reset. */
309 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
311 /* Device has completely failed, is unrecoverable */
312 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
314 /* Device driver is fully recovered and operational */
315 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
318 /* PCI bus error event callbacks */
319 struct pci_error_handlers
321 /* PCI bus error detected on this device */
322 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
323 enum pci_channel_state error);
325 /* MMIO has been re-enabled, but not DMA */
326 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
328 /* PCI Express link has been reset */
329 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
331 /* PCI slot has been reset */
332 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
334 /* Device driver may resume normal operations */
335 void (*resume)(struct pci_dev *dev);
338 /* ---------------------------------------------------------------- */
342 struct list_head node;
344 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
345 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
346 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
347 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
348 int (*resume) (struct pci_dev *dev); /* Device woken up */
349 int (*enable_wake) (struct pci_dev *dev, pci_power_t state, int enable); /* Enable wake event */
350 void (*shutdown) (struct pci_dev *dev);
352 struct pci_error_handlers *err_handler;
353 struct device_driver driver;
354 struct pci_dynids dynids;
357 #define to_pci_driver(drv) container_of(drv,struct pci_driver, driver)
360 * PCI_DEVICE - macro used to describe a specific pci device
361 * @vend: the 16 bit PCI Vendor ID
362 * @dev: the 16 bit PCI Device ID
364 * This macro is used to create a struct pci_device_id that matches a
365 * specific device. The subvendor and subdevice fields will be set to
368 #define PCI_DEVICE(vend,dev) \
369 .vendor = (vend), .device = (dev), \
370 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
373 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
374 * @dev_class: the class, subclass, prog-if triple for this device
375 * @dev_class_mask: the class mask for this device
377 * This macro is used to create a struct pci_device_id that matches a
378 * specific PCI class. The vendor, device, subvendor, and subdevice
379 * fields will be set to PCI_ANY_ID.
381 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
382 .class = (dev_class), .class_mask = (dev_class_mask), \
383 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
384 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
387 * pci_module_init is obsolete, this stays here till we fix up all usages of it
390 #define pci_module_init pci_register_driver
392 /* these external functions are only available when PCI support is enabled */
395 extern struct bus_type pci_bus_type;
397 /* Do NOT directly access these two variables, unless you are arch specific pci
398 * code, or pci core code. */
399 extern struct list_head pci_root_buses; /* list of all known PCI buses */
400 extern struct list_head pci_devices; /* list of all devices */
402 void pcibios_fixup_bus(struct pci_bus *);
403 int pcibios_enable_device(struct pci_dev *, int mask);
404 char *pcibios_setup (char *str);
406 /* Used only when drivers/pci/setup.c is used */
407 void pcibios_align_resource(void *, struct resource *, resource_size_t,
409 void pcibios_update_irq(struct pci_dev *, int irq);
411 /* Generic PCI functions used internally */
413 extern struct pci_bus *pci_find_bus(int domain, int busnr);
414 void pci_bus_add_devices(struct pci_bus *bus);
415 struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus, struct pci_ops *ops, void *sysdata);
416 static inline struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata)
418 struct pci_bus *root_bus;
419 root_bus = pci_scan_bus_parented(NULL, bus, ops, sysdata);
421 pci_bus_add_devices(root_bus);
424 struct pci_bus *pci_create_bus(struct device *parent, int bus, struct pci_ops *ops, void *sysdata);
425 struct pci_bus * pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, int busnr);
426 int pci_scan_slot(struct pci_bus *bus, int devfn);
427 struct pci_dev * pci_scan_single_device(struct pci_bus *bus, int devfn);
428 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
429 unsigned int pci_scan_child_bus(struct pci_bus *bus);
430 void pci_bus_add_device(struct pci_dev *dev);
431 void pci_read_bridge_bases(struct pci_bus *child);
432 struct resource *pci_find_parent_resource(const struct pci_dev *dev, struct resource *res);
433 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
434 extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
435 extern void pci_dev_put(struct pci_dev *dev);
436 extern void pci_remove_bus(struct pci_bus *b);
437 extern void pci_remove_bus_device(struct pci_dev *dev);
438 void pci_setup_cardbus(struct pci_bus *bus);
440 /* Generic PCI functions exported to card drivers */
442 struct pci_dev *pci_find_device (unsigned int vendor, unsigned int device, const struct pci_dev *from);
443 struct pci_dev *pci_find_device_reverse (unsigned int vendor, unsigned int device, const struct pci_dev *from);
444 struct pci_dev *pci_find_slot (unsigned int bus, unsigned int devfn);
445 int pci_find_capability (struct pci_dev *dev, int cap);
446 int pci_find_next_capability (struct pci_dev *dev, u8 pos, int cap);
447 int pci_find_ext_capability (struct pci_dev *dev, int cap);
448 struct pci_bus * pci_find_next_bus(const struct pci_bus *from);
450 struct pci_dev *pci_get_device (unsigned int vendor, unsigned int device, struct pci_dev *from);
451 struct pci_dev *pci_get_subsys (unsigned int vendor, unsigned int device,
452 unsigned int ss_vendor, unsigned int ss_device,
453 struct pci_dev *from);
454 struct pci_dev *pci_get_slot (struct pci_bus *bus, unsigned int devfn);
455 struct pci_dev *pci_get_class (unsigned int class, struct pci_dev *from);
456 int pci_dev_present(const struct pci_device_id *ids);
458 int pci_bus_read_config_byte (struct pci_bus *bus, unsigned int devfn, int where, u8 *val);
459 int pci_bus_read_config_word (struct pci_bus *bus, unsigned int devfn, int where, u16 *val);
460 int pci_bus_read_config_dword (struct pci_bus *bus, unsigned int devfn, int where, u32 *val);
461 int pci_bus_write_config_byte (struct pci_bus *bus, unsigned int devfn, int where, u8 val);
462 int pci_bus_write_config_word (struct pci_bus *bus, unsigned int devfn, int where, u16 val);
463 int pci_bus_write_config_dword (struct pci_bus *bus, unsigned int devfn, int where, u32 val);
465 static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val)
467 return pci_bus_read_config_byte (dev->bus, dev->devfn, where, val);
469 static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val)
471 return pci_bus_read_config_word (dev->bus, dev->devfn, where, val);
473 static inline int pci_read_config_dword(struct pci_dev *dev, int where, u32 *val)
475 return pci_bus_read_config_dword (dev->bus, dev->devfn, where, val);
477 static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val)
479 return pci_bus_write_config_byte (dev->bus, dev->devfn, where, val);
481 static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val)
483 return pci_bus_write_config_word (dev->bus, dev->devfn, where, val);
485 static inline int pci_write_config_dword(struct pci_dev *dev, int where, u32 val)
487 return pci_bus_write_config_dword (dev->bus, dev->devfn, where, val);
490 int pci_enable_device(struct pci_dev *dev);
491 int pci_enable_device_bars(struct pci_dev *dev, int mask);
492 void pci_disable_device(struct pci_dev *dev);
493 void pci_set_master(struct pci_dev *dev);
494 #define HAVE_PCI_SET_MWI
495 int pci_set_mwi(struct pci_dev *dev);
496 void pci_clear_mwi(struct pci_dev *dev);
497 void pci_intx(struct pci_dev *dev, int enable);
498 int pci_set_dma_mask(struct pci_dev *dev, u64 mask);
499 int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask);
500 void pci_update_resource(struct pci_dev *dev, struct resource *res, int resno);
501 int pci_assign_resource(struct pci_dev *dev, int i);
502 int pci_assign_resource_fixed(struct pci_dev *dev, int i);
503 void pci_restore_bars(struct pci_dev *dev);
505 /* ROM control related routines */
506 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
507 void __iomem __must_check *pci_map_rom_copy(struct pci_dev *pdev, size_t *size);
508 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
509 void pci_remove_rom(struct pci_dev *pdev);
511 /* Power management related routines */
512 int pci_save_state(struct pci_dev *dev);
513 int pci_restore_state(struct pci_dev *dev);
514 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
515 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
516 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable);
518 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
519 void pci_bus_assign_resources(struct pci_bus *bus);
520 void pci_bus_size_bridges(struct pci_bus *bus);
521 int pci_claim_resource(struct pci_dev *, int);
522 void pci_assign_unassigned_resources(void);
523 void pdev_enable_device(struct pci_dev *);
524 void pdev_sort_resources(struct pci_dev *, struct resource_list *);
525 void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
526 int (*)(struct pci_dev *, u8, u8));
527 #define HAVE_PCI_REQ_REGIONS 2
528 int pci_request_regions(struct pci_dev *, const char *);
529 void pci_release_regions(struct pci_dev *);
530 int pci_request_region(struct pci_dev *, int, const char *);
531 void pci_release_region(struct pci_dev *, int);
533 /* drivers/pci/bus.c */
534 int pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res,
535 resource_size_t size, resource_size_t align,
536 resource_size_t min, unsigned int type_mask,
537 void (*alignf)(void *, struct resource *,
538 resource_size_t, resource_size_t),
540 void pci_enable_bridges(struct pci_bus *bus);
542 /* Proper probing supporting hot-pluggable devices */
543 int __pci_register_driver(struct pci_driver *, struct module *);
544 static inline int pci_register_driver(struct pci_driver *driver)
546 return __pci_register_driver(driver, THIS_MODULE);
549 void pci_unregister_driver(struct pci_driver *);
550 void pci_remove_behind_bridge(struct pci_dev *);
551 struct pci_driver *pci_dev_driver(const struct pci_dev *);
552 const struct pci_device_id *pci_match_device(struct pci_driver *drv, struct pci_dev *dev);
553 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, struct pci_dev *dev);
554 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max, int pass);
556 void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *),
558 int pci_cfg_space_size(struct pci_dev *dev);
559 unsigned char pci_bus_max_busnr(struct pci_bus* bus);
561 /* kmem_cache style wrapper around pci_alloc_consistent() */
563 #include <linux/dmapool.h>
565 #define pci_pool dma_pool
566 #define pci_pool_create(name, pdev, size, align, allocation) \
567 dma_pool_create(name, &pdev->dev, size, align, allocation)
568 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
569 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
570 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
572 enum pci_dma_burst_strategy {
573 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
574 strategy_parameter is N/A */
575 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
577 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
578 strategy_parameter byte boundaries */
581 #if defined(CONFIG_ISA) || defined(CONFIG_EISA)
582 extern struct pci_dev *isa_bridge;
586 u16 vector; /* kernel uses to write allocated vector */
587 u16 entry; /* driver uses to specify entry, OS writes */
590 #ifndef CONFIG_PCI_MSI
591 static inline void pci_scan_msi_device(struct pci_dev *dev) {}
592 static inline int pci_enable_msi(struct pci_dev *dev) {return -1;}
593 static inline void pci_disable_msi(struct pci_dev *dev) {}
594 static inline int pci_enable_msix(struct pci_dev* dev,
595 struct msix_entry *entries, int nvec) {return -1;}
596 static inline void pci_disable_msix(struct pci_dev *dev) {}
597 static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev) {}
599 extern void pci_scan_msi_device(struct pci_dev *dev);
600 extern int pci_enable_msi(struct pci_dev *dev);
601 extern void pci_disable_msi(struct pci_dev *dev);
602 extern int pci_enable_msix(struct pci_dev* dev,
603 struct msix_entry *entries, int nvec);
604 extern void pci_disable_msix(struct pci_dev *dev);
605 extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
608 extern void pci_block_user_cfg_access(struct pci_dev *dev);
609 extern void pci_unblock_user_cfg_access(struct pci_dev *dev);
612 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
613 * a PCI domain is defined to be a set of PCI busses which share
614 * configuration space.
616 #ifndef CONFIG_PCI_DOMAINS
617 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
618 static inline int pci_proc_domain(struct pci_bus *bus)
624 #else /* CONFIG_PCI is not enabled */
627 * If the system does not have PCI, clearly these return errors. Define
628 * these as simple inline functions to avoid hair in drivers.
631 #define _PCI_NOP(o,s,t) \
632 static inline int pci_##o##_config_##s (struct pci_dev *dev, int where, t val) \
633 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
634 #define _PCI_NOP_ALL(o,x) _PCI_NOP(o,byte,u8 x) \
635 _PCI_NOP(o,word,u16 x) \
636 _PCI_NOP(o,dword,u32 x)
637 _PCI_NOP_ALL(read, *)
640 static inline struct pci_dev *pci_find_device(unsigned int vendor, unsigned int device, const struct pci_dev *from)
643 static inline struct pci_dev *pci_find_slot(unsigned int bus, unsigned int devfn)
646 static inline struct pci_dev *pci_get_device (unsigned int vendor, unsigned int device, struct pci_dev *from)
649 static inline struct pci_dev *pci_get_subsys (unsigned int vendor, unsigned int device,
650 unsigned int ss_vendor, unsigned int ss_device, struct pci_dev *from)
653 static inline struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from)
656 #define pci_dev_present(ids) (0)
657 #define pci_dev_put(dev) do { } while (0)
659 static inline void pci_set_master(struct pci_dev *dev) { }
660 static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
661 static inline void pci_disable_device(struct pci_dev *dev) { }
662 static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask) { return -EIO; }
663 static inline int pci_assign_resource(struct pci_dev *dev, int i) { return -EBUSY;}
664 static inline int __pci_register_driver(struct pci_driver *drv, struct module *owner) { return 0;}
665 static inline int pci_register_driver(struct pci_driver *drv) { return 0;}
666 static inline void pci_unregister_driver(struct pci_driver *drv) { }
667 static inline int pci_find_capability (struct pci_dev *dev, int cap) {return 0; }
668 static inline int pci_find_next_capability (struct pci_dev *dev, u8 post, int cap) { return 0; }
669 static inline int pci_find_ext_capability (struct pci_dev *dev, int cap) {return 0; }
670 static inline const struct pci_device_id *pci_match_device(const struct pci_device_id *ids, const struct pci_dev *dev) { return NULL; }
672 /* Power management related routines */
673 static inline int pci_save_state(struct pci_dev *dev) { return 0; }
674 static inline int pci_restore_state(struct pci_dev *dev) { return 0; }
675 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state) { return 0; }
676 static inline pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state) { return PCI_D0; }
677 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable) { return 0; }
679 #define isa_bridge ((struct pci_dev *)NULL)
681 #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
683 static inline void pci_block_user_cfg_access(struct pci_dev *dev) { }
684 static inline void pci_unblock_user_cfg_access(struct pci_dev *dev) { }
686 #endif /* CONFIG_PCI */
688 /* Include architecture-dependent settings and functions */
692 /* these helpers provide future and backwards compatibility
693 * for accessing popular PCI BAR info */
694 #define pci_resource_start(dev,bar) ((dev)->resource[(bar)].start)
695 #define pci_resource_end(dev,bar) ((dev)->resource[(bar)].end)
696 #define pci_resource_flags(dev,bar) ((dev)->resource[(bar)].flags)
697 #define pci_resource_len(dev,bar) \
698 ((pci_resource_start((dev),(bar)) == 0 && \
699 pci_resource_end((dev),(bar)) == \
700 pci_resource_start((dev),(bar))) ? 0 : \
702 (pci_resource_end((dev),(bar)) - \
703 pci_resource_start((dev),(bar)) + 1))
705 /* Similar to the helpers above, these manipulate per-pci_dev
706 * driver-specific data. They are really just a wrapper around
707 * the generic device structure functions of these calls.
709 static inline void *pci_get_drvdata (struct pci_dev *pdev)
711 return dev_get_drvdata(&pdev->dev);
714 static inline void pci_set_drvdata (struct pci_dev *pdev, void *data)
716 dev_set_drvdata(&pdev->dev, data);
719 /* If you want to know what to call your pci_dev, ask this function.
720 * Again, it's a wrapper around the generic device.
722 static inline char *pci_name(struct pci_dev *pdev)
724 return pdev->dev.bus_id;
728 /* Some archs don't want to expose struct resource to userland as-is
731 #ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
732 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
733 const struct resource *rsrc, resource_size_t *start,
734 resource_size_t *end)
736 *start = rsrc->start;
739 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
743 * The world is not perfect and supplies us with broken PCI devices.
744 * For at least a part of these bugs we need a work-around, so both
745 * generic (drivers/pci/quirks.c) and per-architecture code can define
746 * fixup hooks to be called for particular buggy devices.
750 u16 vendor, device; /* You can use PCI_ANY_ID here of course */
751 void (*hook)(struct pci_dev *dev);
754 enum pci_fixup_pass {
755 pci_fixup_early, /* Before probing BARs */
756 pci_fixup_header, /* After reading configuration header */
757 pci_fixup_final, /* Final phase of device fixups */
758 pci_fixup_enable, /* pci_enable_device() time */
761 /* Anonymous variables would be nice... */
762 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook) \
763 static const struct pci_fixup __pci_fixup_##name __attribute_used__ \
764 __attribute__((__section__(#section))) = { vendor, device, hook };
765 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
766 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
767 vendor##device##hook, vendor, device, hook)
768 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
769 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
770 vendor##device##hook, vendor, device, hook)
771 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
772 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
773 vendor##device##hook, vendor, device, hook)
774 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
775 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
776 vendor##device##hook, vendor, device, hook)
779 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
781 extern int pci_pci_problems;
782 #define PCIPCI_FAIL 1
783 #define PCIPCI_TRITON 2
784 #define PCIPCI_NATOMA 4
785 #define PCIPCI_VIAETBF 8
786 #define PCIPCI_VSFX 16
787 #define PCIPCI_ALIMAGIK 32
789 #endif /* __KERNEL__ */
790 #endif /* LINUX_PCI_H */