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/compiler.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,
98 typedef unsigned short __bitwise pci_bus_flags_t;
100 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
103 struct pci_cap_saved_state {
104 struct hlist_node next;
110 * The pci_dev structure is used to describe PCI devices.
113 struct list_head global_list; /* node in list of all PCI devices */
114 struct list_head bus_list; /* node in per-bus list */
115 struct pci_bus *bus; /* bus this device is on */
116 struct pci_bus *subordinate; /* bus this device bridges to */
118 void *sysdata; /* hook for sys-specific extension */
119 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
121 unsigned int devfn; /* encoded device & function index */
122 unsigned short vendor;
123 unsigned short device;
124 unsigned short subsystem_vendor;
125 unsigned short subsystem_device;
126 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
127 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
128 u8 rom_base_reg; /* which config register controls the ROM */
129 u8 pin; /* which interrupt pin this device uses */
131 struct pci_driver *driver; /* which driver has allocated this device */
132 u64 dma_mask; /* Mask of the bits of bus address this
133 device implements. Normally this is
134 0xffffffff. You only need to change
135 this if your device has broken DMA
136 or supports 64-bit transfers. */
138 pci_power_t current_state; /* Current operating state. In ACPI-speak,
139 this is D0-D3, D0 being fully functional,
142 pci_channel_state_t error_state; /* current connectivity state */
143 struct device dev; /* Generic device interface */
145 /* device is compatible with these IDs */
146 unsigned short vendor_compatible[DEVICE_COUNT_COMPATIBLE];
147 unsigned short device_compatible[DEVICE_COUNT_COMPATIBLE];
149 int cfg_size; /* Size of configuration space */
152 * Instead of touching interrupt line and base address registers
153 * directly, use the values stored here. They might be different!
156 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
158 /* These fields are used by common fixups */
159 unsigned int transparent:1; /* Transparent PCI bridge */
160 unsigned int multifunction:1;/* Part of multi-function device */
161 /* keep track of device state */
162 unsigned int is_enabled:1; /* pci_enable_device has been called */
163 unsigned int is_busmaster:1; /* device is busmaster */
164 unsigned int no_msi:1; /* device may not use msi */
165 unsigned int no_d1d2:1; /* only allow d0 or d3 */
166 unsigned int block_ucfg_access:1; /* userspace config space access is blocked */
167 unsigned int broken_parity_status:1; /* Device generates false positive parity */
168 unsigned int msi_enabled:1;
169 unsigned int msix_enabled:1;
171 u32 saved_config_space[16]; /* config space saved at suspend time */
172 struct hlist_head saved_cap_space;
173 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
174 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
175 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
178 #define pci_dev_g(n) list_entry(n, struct pci_dev, global_list)
179 #define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
180 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
181 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
183 static inline struct pci_cap_saved_state *pci_find_saved_cap(
184 struct pci_dev *pci_dev,char cap)
186 struct pci_cap_saved_state *tmp;
187 struct hlist_node *pos;
189 hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) {
190 if (tmp->cap_nr == cap)
196 static inline void pci_add_saved_cap(struct pci_dev *pci_dev,
197 struct pci_cap_saved_state *new_cap)
199 hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space);
202 static inline void pci_remove_saved_cap(struct pci_cap_saved_state *cap)
204 hlist_del(&cap->next);
208 * For PCI devices, the region numbers are assigned this way:
210 * 0-5 standard PCI regions
212 * 7-10 bridges: address space assigned to buses behind the bridge
215 #define PCI_ROM_RESOURCE 6
216 #define PCI_BRIDGE_RESOURCES 7
217 #define PCI_NUM_RESOURCES 11
219 #ifndef PCI_BUS_NUM_RESOURCES
220 #define PCI_BUS_NUM_RESOURCES 8
223 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
226 struct list_head node; /* node in list of buses */
227 struct pci_bus *parent; /* parent bus this bridge is on */
228 struct list_head children; /* list of child buses */
229 struct list_head devices; /* list of devices on this bus */
230 struct pci_dev *self; /* bridge device as seen by parent */
231 struct resource *resource[PCI_BUS_NUM_RESOURCES];
232 /* address space routed to this bus */
234 struct pci_ops *ops; /* configuration access functions */
235 void *sysdata; /* hook for sys-specific extension */
236 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
238 unsigned char number; /* bus number */
239 unsigned char primary; /* number of primary bridge */
240 unsigned char secondary; /* number of secondary bridge */
241 unsigned char subordinate; /* max number of subordinate buses */
245 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
246 pci_bus_flags_t bus_flags; /* Inherited by child busses */
247 struct device *bridge;
248 struct class_device class_dev;
249 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
250 struct bin_attribute *legacy_mem; /* legacy mem */
253 #define pci_bus_b(n) list_entry(n, struct pci_bus, node)
254 #define to_pci_bus(n) container_of(n, struct pci_bus, class_dev)
257 * Error values that may be returned by PCI functions.
259 #define PCIBIOS_SUCCESSFUL 0x00
260 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
261 #define PCIBIOS_BAD_VENDOR_ID 0x83
262 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
263 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
264 #define PCIBIOS_SET_FAILED 0x88
265 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
267 /* Low-level architecture-dependent routines */
270 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
271 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
275 int (*read)(unsigned int domain, unsigned int bus, unsigned int devfn,
276 int reg, int len, u32 *val);
277 int (*write)(unsigned int domain, unsigned int bus, unsigned int devfn,
278 int reg, int len, u32 val);
281 extern struct pci_raw_ops *raw_pci_ops;
283 struct pci_bus_region {
289 spinlock_t lock; /* protects list, index */
290 struct list_head list; /* for IDs added at runtime */
291 unsigned int use_driver_data:1; /* pci_driver->driver_data is used */
294 /* ---------------------------------------------------------------- */
295 /** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
296 * a set fof callbacks in struct pci_error_handlers, then that device driver
297 * will be notified of PCI bus errors, and will be driven to recovery
298 * when an error occurs.
301 typedef unsigned int __bitwise pci_ers_result_t;
303 enum pci_ers_result {
304 /* no result/none/not supported in device driver */
305 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
307 /* Device driver can recover without slot reset */
308 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
310 /* Device driver wants slot to be reset. */
311 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
313 /* Device has completely failed, is unrecoverable */
314 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
316 /* Device driver is fully recovered and operational */
317 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
320 /* PCI bus error event callbacks */
321 struct pci_error_handlers
323 /* PCI bus error detected on this device */
324 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
325 enum pci_channel_state error);
327 /* MMIO has been re-enabled, but not DMA */
328 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
330 /* PCI Express link has been reset */
331 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
333 /* PCI slot has been reset */
334 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
336 /* Device driver may resume normal operations */
337 void (*resume)(struct pci_dev *dev);
340 /* ---------------------------------------------------------------- */
344 struct list_head node;
346 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
347 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
348 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
349 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
350 int (*suspend_late) (struct pci_dev *dev, pm_message_t state);
351 int (*resume_early) (struct pci_dev *dev);
352 int (*resume) (struct pci_dev *dev); /* Device woken up */
353 int (*enable_wake) (struct pci_dev *dev, pci_power_t state, int enable); /* Enable wake event */
354 void (*shutdown) (struct pci_dev *dev);
356 struct pci_error_handlers *err_handler;
357 struct device_driver driver;
358 struct pci_dynids dynids;
360 int multithread_probe;
363 #define to_pci_driver(drv) container_of(drv,struct pci_driver, driver)
366 * PCI_DEVICE - macro used to describe a specific pci device
367 * @vend: the 16 bit PCI Vendor ID
368 * @dev: the 16 bit PCI Device ID
370 * This macro is used to create a struct pci_device_id that matches a
371 * specific device. The subvendor and subdevice fields will be set to
374 #define PCI_DEVICE(vend,dev) \
375 .vendor = (vend), .device = (dev), \
376 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
379 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
380 * @dev_class: the class, subclass, prog-if triple for this device
381 * @dev_class_mask: the class mask for this device
383 * This macro is used to create a struct pci_device_id that matches a
384 * specific PCI class. The vendor, device, subvendor, and subdevice
385 * fields will be set to PCI_ANY_ID.
387 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
388 .class = (dev_class), .class_mask = (dev_class_mask), \
389 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
390 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
393 * pci_module_init is obsolete, this stays here till we fix up all usages of it
396 #define pci_module_init pci_register_driver
398 /* these external functions are only available when PCI support is enabled */
401 extern struct bus_type pci_bus_type;
403 /* Do NOT directly access these two variables, unless you are arch specific pci
404 * code, or pci core code. */
405 extern struct list_head pci_root_buses; /* list of all known PCI buses */
406 extern struct list_head pci_devices; /* list of all devices */
408 void pcibios_fixup_bus(struct pci_bus *);
409 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
410 char *pcibios_setup (char *str);
412 /* Used only when drivers/pci/setup.c is used */
413 void pcibios_align_resource(void *, struct resource *, resource_size_t,
415 void pcibios_update_irq(struct pci_dev *, int irq);
417 /* Generic PCI functions used internally */
419 extern struct pci_bus *pci_find_bus(int domain, int busnr);
420 void pci_bus_add_devices(struct pci_bus *bus);
421 struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus, struct pci_ops *ops, void *sysdata);
422 static inline struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata)
424 struct pci_bus *root_bus;
425 root_bus = pci_scan_bus_parented(NULL, bus, ops, sysdata);
427 pci_bus_add_devices(root_bus);
430 struct pci_bus *pci_create_bus(struct device *parent, int bus, struct pci_ops *ops, void *sysdata);
431 struct pci_bus * pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, int busnr);
432 int pci_scan_slot(struct pci_bus *bus, int devfn);
433 struct pci_dev * pci_scan_single_device(struct pci_bus *bus, int devfn);
434 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
435 unsigned int pci_scan_child_bus(struct pci_bus *bus);
436 int __must_check pci_bus_add_device(struct pci_dev *dev);
437 void pci_read_bridge_bases(struct pci_bus *child);
438 struct resource *pci_find_parent_resource(const struct pci_dev *dev, struct resource *res);
439 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
440 extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
441 extern void pci_dev_put(struct pci_dev *dev);
442 extern void pci_remove_bus(struct pci_bus *b);
443 extern void pci_remove_bus_device(struct pci_dev *dev);
444 extern void pci_stop_bus_device(struct pci_dev *dev);
445 void pci_setup_cardbus(struct pci_bus *bus);
447 /* Generic PCI functions exported to card drivers */
449 struct pci_dev *pci_find_device (unsigned int vendor, unsigned int device, const struct pci_dev *from);
450 struct pci_dev *pci_find_device_reverse (unsigned int vendor, unsigned int device, const struct pci_dev *from);
451 struct pci_dev *pci_find_slot (unsigned int bus, unsigned int devfn);
452 int pci_find_capability (struct pci_dev *dev, int cap);
453 int pci_find_next_capability (struct pci_dev *dev, u8 pos, int cap);
454 int pci_find_ext_capability (struct pci_dev *dev, int cap);
455 struct pci_bus * pci_find_next_bus(const struct pci_bus *from);
457 struct pci_dev *pci_get_device (unsigned int vendor, unsigned int device, struct pci_dev *from);
458 struct pci_dev *pci_get_subsys (unsigned int vendor, unsigned int device,
459 unsigned int ss_vendor, unsigned int ss_device,
460 struct pci_dev *from);
461 struct pci_dev *pci_get_slot (struct pci_bus *bus, unsigned int devfn);
462 struct pci_dev *pci_get_class (unsigned int class, struct pci_dev *from);
463 int pci_dev_present(const struct pci_device_id *ids);
465 int pci_bus_read_config_byte (struct pci_bus *bus, unsigned int devfn, int where, u8 *val);
466 int pci_bus_read_config_word (struct pci_bus *bus, unsigned int devfn, int where, u16 *val);
467 int pci_bus_read_config_dword (struct pci_bus *bus, unsigned int devfn, int where, u32 *val);
468 int pci_bus_write_config_byte (struct pci_bus *bus, unsigned int devfn, int where, u8 val);
469 int pci_bus_write_config_word (struct pci_bus *bus, unsigned int devfn, int where, u16 val);
470 int pci_bus_write_config_dword (struct pci_bus *bus, unsigned int devfn, int where, u32 val);
472 static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val)
474 return pci_bus_read_config_byte (dev->bus, dev->devfn, where, val);
476 static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val)
478 return pci_bus_read_config_word (dev->bus, dev->devfn, where, val);
480 static inline int pci_read_config_dword(struct pci_dev *dev, int where, u32 *val)
482 return pci_bus_read_config_dword (dev->bus, dev->devfn, where, val);
484 static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val)
486 return pci_bus_write_config_byte (dev->bus, dev->devfn, where, val);
488 static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val)
490 return pci_bus_write_config_word (dev->bus, dev->devfn, where, val);
492 static inline int pci_write_config_dword(struct pci_dev *dev, int where, u32 val)
494 return pci_bus_write_config_dword (dev->bus, dev->devfn, where, val);
497 int __must_check pci_enable_device(struct pci_dev *dev);
498 int __must_check pci_enable_device_bars(struct pci_dev *dev, int mask);
499 void pci_disable_device(struct pci_dev *dev);
500 void pci_set_master(struct pci_dev *dev);
501 #define HAVE_PCI_SET_MWI
502 int __must_check pci_set_mwi(struct pci_dev *dev);
503 void pci_clear_mwi(struct pci_dev *dev);
504 void pci_intx(struct pci_dev *dev, int enable);
505 int pci_set_dma_mask(struct pci_dev *dev, u64 mask);
506 int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask);
507 void pci_update_resource(struct pci_dev *dev, struct resource *res, int resno);
508 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
509 int __must_check pci_assign_resource_fixed(struct pci_dev *dev, int i);
510 void pci_restore_bars(struct pci_dev *dev);
512 /* ROM control related routines */
513 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
514 void __iomem __must_check *pci_map_rom_copy(struct pci_dev *pdev, size_t *size);
515 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
516 void pci_remove_rom(struct pci_dev *pdev);
518 /* Power management related routines */
519 int pci_save_state(struct pci_dev *dev);
520 int pci_restore_state(struct pci_dev *dev);
521 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
522 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
523 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable);
525 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
526 void pci_bus_assign_resources(struct pci_bus *bus);
527 void pci_bus_size_bridges(struct pci_bus *bus);
528 int pci_claim_resource(struct pci_dev *, int);
529 void pci_assign_unassigned_resources(void);
530 void pdev_enable_device(struct pci_dev *);
531 void pdev_sort_resources(struct pci_dev *, struct resource_list *);
532 void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
533 int (*)(struct pci_dev *, u8, u8));
534 #define HAVE_PCI_REQ_REGIONS 2
535 int __must_check pci_request_regions(struct pci_dev *, const char *);
536 void pci_release_regions(struct pci_dev *);
537 int __must_check pci_request_region(struct pci_dev *, int, const char *);
538 void pci_release_region(struct pci_dev *, int);
540 /* drivers/pci/bus.c */
541 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
542 struct resource *res, resource_size_t size,
543 resource_size_t align, resource_size_t min,
544 unsigned int type_mask,
545 void (*alignf)(void *, struct resource *,
546 resource_size_t, resource_size_t),
548 void pci_enable_bridges(struct pci_bus *bus);
550 /* Proper probing supporting hot-pluggable devices */
551 int __must_check __pci_register_driver(struct pci_driver *, struct module *);
552 static inline int __must_check pci_register_driver(struct pci_driver *driver)
554 return __pci_register_driver(driver, THIS_MODULE);
557 void pci_unregister_driver(struct pci_driver *);
558 void pci_remove_behind_bridge(struct pci_dev *);
559 struct pci_driver *pci_dev_driver(const struct pci_dev *);
560 const struct pci_device_id *pci_match_device(struct pci_driver *drv, struct pci_dev *dev);
561 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, struct pci_dev *dev);
562 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max, int pass);
564 void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *),
566 int pci_cfg_space_size(struct pci_dev *dev);
567 unsigned char pci_bus_max_busnr(struct pci_bus* bus);
569 /* kmem_cache style wrapper around pci_alloc_consistent() */
571 #include <linux/dmapool.h>
573 #define pci_pool dma_pool
574 #define pci_pool_create(name, pdev, size, align, allocation) \
575 dma_pool_create(name, &pdev->dev, size, align, allocation)
576 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
577 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
578 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
580 enum pci_dma_burst_strategy {
581 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
582 strategy_parameter is N/A */
583 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
585 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
586 strategy_parameter byte boundaries */
589 #if defined(CONFIG_ISA) || defined(CONFIG_EISA)
590 extern struct pci_dev *isa_bridge;
594 u16 vector; /* kernel uses to write allocated vector */
595 u16 entry; /* driver uses to specify entry, OS writes */
598 #ifndef CONFIG_PCI_MSI
599 static inline void pci_scan_msi_device(struct pci_dev *dev) {}
600 static inline int pci_enable_msi(struct pci_dev *dev) {return -1;}
601 static inline void pci_disable_msi(struct pci_dev *dev) {}
602 static inline int pci_enable_msix(struct pci_dev* dev,
603 struct msix_entry *entries, int nvec) {return -1;}
604 static inline void pci_disable_msix(struct pci_dev *dev) {}
605 static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev) {}
607 extern void pci_scan_msi_device(struct pci_dev *dev);
608 extern int pci_enable_msi(struct pci_dev *dev);
609 extern void pci_disable_msi(struct pci_dev *dev);
610 extern int pci_enable_msix(struct pci_dev* dev,
611 struct msix_entry *entries, int nvec);
612 extern void pci_disable_msix(struct pci_dev *dev);
613 extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
616 extern void pci_block_user_cfg_access(struct pci_dev *dev);
617 extern void pci_unblock_user_cfg_access(struct pci_dev *dev);
620 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
621 * a PCI domain is defined to be a set of PCI busses which share
622 * configuration space.
624 #ifndef CONFIG_PCI_DOMAINS
625 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
626 static inline int pci_proc_domain(struct pci_bus *bus)
632 #else /* CONFIG_PCI is not enabled */
635 * If the system does not have PCI, clearly these return errors. Define
636 * these as simple inline functions to avoid hair in drivers.
639 #define _PCI_NOP(o,s,t) \
640 static inline int pci_##o##_config_##s (struct pci_dev *dev, int where, t val) \
641 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
642 #define _PCI_NOP_ALL(o,x) _PCI_NOP(o,byte,u8 x) \
643 _PCI_NOP(o,word,u16 x) \
644 _PCI_NOP(o,dword,u32 x)
645 _PCI_NOP_ALL(read, *)
648 static inline struct pci_dev *pci_find_device(unsigned int vendor, unsigned int device, const struct pci_dev *from)
651 static inline struct pci_dev *pci_find_slot(unsigned int bus, unsigned int devfn)
654 static inline struct pci_dev *pci_get_device (unsigned int vendor, unsigned int device, struct pci_dev *from)
657 static inline struct pci_dev *pci_get_subsys (unsigned int vendor, unsigned int device,
658 unsigned int ss_vendor, unsigned int ss_device, struct pci_dev *from)
661 static inline struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from)
664 #define pci_dev_present(ids) (0)
665 #define pci_dev_put(dev) do { } while (0)
667 static inline void pci_set_master(struct pci_dev *dev) { }
668 static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
669 static inline void pci_disable_device(struct pci_dev *dev) { }
670 static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask) { return -EIO; }
671 static inline int pci_assign_resource(struct pci_dev *dev, int i) { return -EBUSY;}
672 static inline int __pci_register_driver(struct pci_driver *drv, struct module *owner) { return 0;}
673 static inline int pci_register_driver(struct pci_driver *drv) { return 0;}
674 static inline void pci_unregister_driver(struct pci_driver *drv) { }
675 static inline int pci_find_capability (struct pci_dev *dev, int cap) {return 0; }
676 static inline int pci_find_next_capability (struct pci_dev *dev, u8 post, int cap) { return 0; }
677 static inline int pci_find_ext_capability (struct pci_dev *dev, int cap) {return 0; }
678 static inline const struct pci_device_id *pci_match_device(const struct pci_device_id *ids, const struct pci_dev *dev) { return NULL; }
680 /* Power management related routines */
681 static inline int pci_save_state(struct pci_dev *dev) { return 0; }
682 static inline int pci_restore_state(struct pci_dev *dev) { return 0; }
683 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state) { return 0; }
684 static inline pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state) { return PCI_D0; }
685 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable) { return 0; }
687 #define isa_bridge ((struct pci_dev *)NULL)
689 #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
691 static inline void pci_block_user_cfg_access(struct pci_dev *dev) { }
692 static inline void pci_unblock_user_cfg_access(struct pci_dev *dev) { }
694 #endif /* CONFIG_PCI */
696 /* Include architecture-dependent settings and functions */
700 /* these helpers provide future and backwards compatibility
701 * for accessing popular PCI BAR info */
702 #define pci_resource_start(dev,bar) ((dev)->resource[(bar)].start)
703 #define pci_resource_end(dev,bar) ((dev)->resource[(bar)].end)
704 #define pci_resource_flags(dev,bar) ((dev)->resource[(bar)].flags)
705 #define pci_resource_len(dev,bar) \
706 ((pci_resource_start((dev),(bar)) == 0 && \
707 pci_resource_end((dev),(bar)) == \
708 pci_resource_start((dev),(bar))) ? 0 : \
710 (pci_resource_end((dev),(bar)) - \
711 pci_resource_start((dev),(bar)) + 1))
713 /* Similar to the helpers above, these manipulate per-pci_dev
714 * driver-specific data. They are really just a wrapper around
715 * the generic device structure functions of these calls.
717 static inline void *pci_get_drvdata (struct pci_dev *pdev)
719 return dev_get_drvdata(&pdev->dev);
722 static inline void pci_set_drvdata (struct pci_dev *pdev, void *data)
724 dev_set_drvdata(&pdev->dev, data);
727 /* If you want to know what to call your pci_dev, ask this function.
728 * Again, it's a wrapper around the generic device.
730 static inline char *pci_name(struct pci_dev *pdev)
732 return pdev->dev.bus_id;
736 /* Some archs don't want to expose struct resource to userland as-is
739 #ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
740 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
741 const struct resource *rsrc, resource_size_t *start,
742 resource_size_t *end)
744 *start = rsrc->start;
747 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
751 * The world is not perfect and supplies us with broken PCI devices.
752 * For at least a part of these bugs we need a work-around, so both
753 * generic (drivers/pci/quirks.c) and per-architecture code can define
754 * fixup hooks to be called for particular buggy devices.
758 u16 vendor, device; /* You can use PCI_ANY_ID here of course */
759 void (*hook)(struct pci_dev *dev);
762 enum pci_fixup_pass {
763 pci_fixup_early, /* Before probing BARs */
764 pci_fixup_header, /* After reading configuration header */
765 pci_fixup_final, /* Final phase of device fixups */
766 pci_fixup_enable, /* pci_enable_device() time */
769 /* Anonymous variables would be nice... */
770 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook) \
771 static const struct pci_fixup __pci_fixup_##name __attribute_used__ \
772 __attribute__((__section__(#section))) = { vendor, device, hook };
773 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
774 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
775 vendor##device##hook, vendor, device, hook)
776 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
777 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
778 vendor##device##hook, vendor, device, hook)
779 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
780 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
781 vendor##device##hook, vendor, device, hook)
782 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
783 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
784 vendor##device##hook, vendor, device, hook)
787 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
789 extern int pci_pci_problems;
790 #define PCIPCI_FAIL 1
791 #define PCIPCI_TRITON 2
792 #define PCIPCI_NATOMA 4
793 #define PCIPCI_VIAETBF 8
794 #define PCIPCI_VSFX 16
795 #define PCIPCI_ALIMAGIK 32
797 #endif /* __KERNEL__ */
798 #endif /* LINUX_PCI_H */