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,
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 block_ucfg_access:1; /* userspace config space access is blocked */
167 u32 saved_config_space[16]; /* config space saved at suspend time */
168 struct hlist_head saved_cap_space;
169 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
170 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
171 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
174 #define pci_dev_g(n) list_entry(n, struct pci_dev, global_list)
175 #define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
176 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
177 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
179 static inline struct pci_cap_saved_state *pci_find_saved_cap(
180 struct pci_dev *pci_dev,char cap)
182 struct pci_cap_saved_state *tmp;
183 struct hlist_node *pos;
185 hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) {
186 if (tmp->cap_nr == cap)
192 static inline void pci_add_saved_cap(struct pci_dev *pci_dev,
193 struct pci_cap_saved_state *new_cap)
195 hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space);
198 static inline void pci_remove_saved_cap(struct pci_cap_saved_state *cap)
200 hlist_del(&cap->next);
204 * For PCI devices, the region numbers are assigned this way:
206 * 0-5 standard PCI regions
208 * 7-10 bridges: address space assigned to buses behind the bridge
211 #define PCI_ROM_RESOURCE 6
212 #define PCI_BRIDGE_RESOURCES 7
213 #define PCI_NUM_RESOURCES 11
215 #ifndef PCI_BUS_NUM_RESOURCES
216 #define PCI_BUS_NUM_RESOURCES 8
219 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
222 struct list_head node; /* node in list of buses */
223 struct pci_bus *parent; /* parent bus this bridge is on */
224 struct list_head children; /* list of child buses */
225 struct list_head devices; /* list of devices on this bus */
226 struct pci_dev *self; /* bridge device as seen by parent */
227 struct resource *resource[PCI_BUS_NUM_RESOURCES];
228 /* address space routed to this bus */
230 struct pci_ops *ops; /* configuration access functions */
231 void *sysdata; /* hook for sys-specific extension */
232 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
234 unsigned char number; /* bus number */
235 unsigned char primary; /* number of primary bridge */
236 unsigned char secondary; /* number of secondary bridge */
237 unsigned char subordinate; /* max number of subordinate buses */
241 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
242 pci_bus_flags_t bus_flags; /* Inherited by child busses */
243 struct device *bridge;
244 struct class_device class_dev;
245 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
246 struct bin_attribute *legacy_mem; /* legacy mem */
249 #define pci_bus_b(n) list_entry(n, struct pci_bus, node)
250 #define to_pci_bus(n) container_of(n, struct pci_bus, class_dev)
253 * Error values that may be returned by PCI functions.
255 #define PCIBIOS_SUCCESSFUL 0x00
256 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
257 #define PCIBIOS_BAD_VENDOR_ID 0x83
258 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
259 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
260 #define PCIBIOS_SET_FAILED 0x88
261 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
263 /* Low-level architecture-dependent routines */
266 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
267 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
271 int (*read)(unsigned int domain, unsigned int bus, unsigned int devfn,
272 int reg, int len, u32 *val);
273 int (*write)(unsigned int domain, unsigned int bus, unsigned int devfn,
274 int reg, int len, u32 val);
277 extern struct pci_raw_ops *raw_pci_ops;
279 struct pci_bus_region {
285 spinlock_t lock; /* protects list, index */
286 struct list_head list; /* for IDs added at runtime */
287 unsigned int use_driver_data:1; /* pci_driver->driver_data is used */
290 /* ---------------------------------------------------------------- */
291 /** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
292 * a set fof callbacks in struct pci_error_handlers, then that device driver
293 * will be notified of PCI bus errors, and will be driven to recovery
294 * when an error occurs.
297 typedef unsigned int __bitwise pci_ers_result_t;
299 enum pci_ers_result {
300 /* no result/none/not supported in device driver */
301 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
303 /* Device driver can recover without slot reset */
304 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
306 /* Device driver wants slot to be reset. */
307 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
309 /* Device has completely failed, is unrecoverable */
310 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
312 /* Device driver is fully recovered and operational */
313 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
316 /* PCI bus error event callbacks */
317 struct pci_error_handlers
319 /* PCI bus error detected on this device */
320 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
321 enum pci_channel_state error);
323 /* MMIO has been re-enabled, but not DMA */
324 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
326 /* PCI Express link has been reset */
327 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
329 /* PCI slot has been reset */
330 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
332 /* Device driver may resume normal operations */
333 void (*resume)(struct pci_dev *dev);
336 /* ---------------------------------------------------------------- */
340 struct list_head node;
342 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
343 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
344 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
345 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
346 int (*resume) (struct pci_dev *dev); /* Device woken up */
347 int (*enable_wake) (struct pci_dev *dev, pci_power_t state, int enable); /* Enable wake event */
348 void (*shutdown) (struct pci_dev *dev);
350 struct pci_error_handlers *err_handler;
351 struct device_driver driver;
352 struct pci_dynids dynids;
355 #define to_pci_driver(drv) container_of(drv,struct pci_driver, driver)
358 * PCI_DEVICE - macro used to describe a specific pci device
359 * @vend: the 16 bit PCI Vendor ID
360 * @dev: the 16 bit PCI Device ID
362 * This macro is used to create a struct pci_device_id that matches a
363 * specific device. The subvendor and subdevice fields will be set to
366 #define PCI_DEVICE(vend,dev) \
367 .vendor = (vend), .device = (dev), \
368 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
371 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
372 * @dev_class: the class, subclass, prog-if triple for this device
373 * @dev_class_mask: the class mask for this device
375 * This macro is used to create a struct pci_device_id that matches a
376 * specific PCI class. The vendor, device, subvendor, and subdevice
377 * fields will be set to PCI_ANY_ID.
379 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
380 .class = (dev_class), .class_mask = (dev_class_mask), \
381 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
382 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
385 * pci_module_init is obsolete, this stays here till we fix up all usages of it
388 #define pci_module_init pci_register_driver
390 /* these external functions are only available when PCI support is enabled */
393 extern struct bus_type pci_bus_type;
395 /* Do NOT directly access these two variables, unless you are arch specific pci
396 * code, or pci core code. */
397 extern struct list_head pci_root_buses; /* list of all known PCI buses */
398 extern struct list_head pci_devices; /* list of all devices */
400 void pcibios_fixup_bus(struct pci_bus *);
401 int pcibios_enable_device(struct pci_dev *, int mask);
402 char *pcibios_setup (char *str);
404 /* Used only when drivers/pci/setup.c is used */
405 void pcibios_align_resource(void *, struct resource *,
406 unsigned long, unsigned long);
407 void pcibios_update_irq(struct pci_dev *, int irq);
409 /* Generic PCI functions used internally */
411 extern struct pci_bus *pci_find_bus(int domain, int busnr);
412 void pci_bus_add_devices(struct pci_bus *bus);
413 struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus, struct pci_ops *ops, void *sysdata);
414 static inline struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata)
416 struct pci_bus *root_bus;
417 root_bus = pci_scan_bus_parented(NULL, bus, ops, sysdata);
419 pci_bus_add_devices(root_bus);
422 struct pci_bus *pci_create_bus(struct device *parent, int bus, struct pci_ops *ops, void *sysdata);
423 struct pci_bus * pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, int busnr);
424 int pci_scan_slot(struct pci_bus *bus, int devfn);
425 struct pci_dev * pci_scan_single_device(struct pci_bus *bus, int devfn);
426 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
427 unsigned int pci_scan_child_bus(struct pci_bus *bus);
428 void pci_bus_add_device(struct pci_dev *dev);
429 void pci_read_bridge_bases(struct pci_bus *child);
430 struct resource *pci_find_parent_resource(const struct pci_dev *dev, struct resource *res);
431 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
432 extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
433 extern void pci_dev_put(struct pci_dev *dev);
434 extern void pci_remove_bus(struct pci_bus *b);
435 extern void pci_remove_bus_device(struct pci_dev *dev);
436 void pci_setup_cardbus(struct pci_bus *bus);
438 /* Generic PCI functions exported to card drivers */
440 struct pci_dev *pci_find_device (unsigned int vendor, unsigned int device, const struct pci_dev *from);
441 struct pci_dev *pci_find_device_reverse (unsigned int vendor, unsigned int device, const struct pci_dev *from);
442 struct pci_dev *pci_find_slot (unsigned int bus, unsigned int devfn);
443 int pci_find_capability (struct pci_dev *dev, int cap);
444 int pci_find_next_capability (struct pci_dev *dev, u8 pos, int cap);
445 struct pci_bus * pci_find_next_bus(const struct pci_bus *from);
447 struct pci_dev *pci_get_device (unsigned int vendor, unsigned int device, struct pci_dev *from);
448 struct pci_dev *pci_get_subsys (unsigned int vendor, unsigned int device,
449 unsigned int ss_vendor, unsigned int ss_device,
450 struct pci_dev *from);
451 struct pci_dev *pci_get_slot (struct pci_bus *bus, unsigned int devfn);
452 struct pci_dev *pci_get_class (unsigned int class, struct pci_dev *from);
453 int pci_dev_present(const struct pci_device_id *ids);
455 int pci_bus_read_config_byte (struct pci_bus *bus, unsigned int devfn, int where, u8 *val);
456 int pci_bus_read_config_word (struct pci_bus *bus, unsigned int devfn, int where, u16 *val);
457 int pci_bus_read_config_dword (struct pci_bus *bus, unsigned int devfn, int where, u32 *val);
458 int pci_bus_write_config_byte (struct pci_bus *bus, unsigned int devfn, int where, u8 val);
459 int pci_bus_write_config_word (struct pci_bus *bus, unsigned int devfn, int where, u16 val);
460 int pci_bus_write_config_dword (struct pci_bus *bus, unsigned int devfn, int where, u32 val);
462 static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val)
464 return pci_bus_read_config_byte (dev->bus, dev->devfn, where, val);
466 static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val)
468 return pci_bus_read_config_word (dev->bus, dev->devfn, where, val);
470 static inline int pci_read_config_dword(struct pci_dev *dev, int where, u32 *val)
472 return pci_bus_read_config_dword (dev->bus, dev->devfn, where, val);
474 static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val)
476 return pci_bus_write_config_byte (dev->bus, dev->devfn, where, val);
478 static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val)
480 return pci_bus_write_config_word (dev->bus, dev->devfn, where, val);
482 static inline int pci_write_config_dword(struct pci_dev *dev, int where, u32 val)
484 return pci_bus_write_config_dword (dev->bus, dev->devfn, where, val);
487 int pci_enable_device(struct pci_dev *dev);
488 int pci_enable_device_bars(struct pci_dev *dev, int mask);
489 void pci_disable_device(struct pci_dev *dev);
490 void pci_set_master(struct pci_dev *dev);
491 #define HAVE_PCI_SET_MWI
492 int pci_set_mwi(struct pci_dev *dev);
493 void pci_clear_mwi(struct pci_dev *dev);
494 void pci_intx(struct pci_dev *dev, int enable);
495 int pci_set_dma_mask(struct pci_dev *dev, u64 mask);
496 int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask);
497 void pci_update_resource(struct pci_dev *dev, struct resource *res, int resno);
498 int pci_assign_resource(struct pci_dev *dev, int i);
499 void pci_restore_bars(struct pci_dev *dev);
501 /* ROM control related routines */
502 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
503 void __iomem __must_check *pci_map_rom_copy(struct pci_dev *pdev, size_t *size);
504 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
505 void pci_remove_rom(struct pci_dev *pdev);
507 /* Power management related routines */
508 int pci_save_state(struct pci_dev *dev);
509 int pci_restore_state(struct pci_dev *dev);
510 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
511 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
512 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable);
514 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
515 void pci_bus_assign_resources(struct pci_bus *bus);
516 void pci_bus_size_bridges(struct pci_bus *bus);
517 int pci_claim_resource(struct pci_dev *, int);
518 void pci_assign_unassigned_resources(void);
519 void pdev_enable_device(struct pci_dev *);
520 void pdev_sort_resources(struct pci_dev *, struct resource_list *);
521 void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
522 int (*)(struct pci_dev *, u8, u8));
523 #define HAVE_PCI_REQ_REGIONS 2
524 int pci_request_regions(struct pci_dev *, const char *);
525 void pci_release_regions(struct pci_dev *);
526 int pci_request_region(struct pci_dev *, int, const char *);
527 void pci_release_region(struct pci_dev *, int);
529 /* drivers/pci/bus.c */
530 int pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res,
531 unsigned long size, unsigned long align,
532 unsigned long min, unsigned int type_mask,
533 void (*alignf)(void *, struct resource *,
534 unsigned long, unsigned long),
536 void pci_enable_bridges(struct pci_bus *bus);
538 /* Proper probing supporting hot-pluggable devices */
539 int __pci_register_driver(struct pci_driver *, struct module *);
540 static inline int pci_register_driver(struct pci_driver *driver)
542 return __pci_register_driver(driver, THIS_MODULE);
545 void pci_unregister_driver(struct pci_driver *);
546 void pci_remove_behind_bridge(struct pci_dev *);
547 struct pci_driver *pci_dev_driver(const struct pci_dev *);
548 const struct pci_device_id *pci_match_device(struct pci_driver *drv, struct pci_dev *dev);
549 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, struct pci_dev *dev);
550 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max, int pass);
552 void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *),
554 int pci_cfg_space_size(struct pci_dev *dev);
555 unsigned char pci_bus_max_busnr(struct pci_bus* bus);
557 /* kmem_cache style wrapper around pci_alloc_consistent() */
559 #include <linux/dmapool.h>
561 #define pci_pool dma_pool
562 #define pci_pool_create(name, pdev, size, align, allocation) \
563 dma_pool_create(name, &pdev->dev, size, align, allocation)
564 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
565 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
566 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
568 enum pci_dma_burst_strategy {
569 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
570 strategy_parameter is N/A */
571 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
573 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
574 strategy_parameter byte boundaries */
577 #if defined(CONFIG_ISA) || defined(CONFIG_EISA)
578 extern struct pci_dev *isa_bridge;
582 u16 vector; /* kernel uses to write allocated vector */
583 u16 entry; /* driver uses to specify entry, OS writes */
586 #ifndef CONFIG_PCI_MSI
587 static inline void pci_scan_msi_device(struct pci_dev *dev) {}
588 static inline int pci_enable_msi(struct pci_dev *dev) {return -1;}
589 static inline void pci_disable_msi(struct pci_dev *dev) {}
590 static inline int pci_enable_msix(struct pci_dev* dev,
591 struct msix_entry *entries, int nvec) {return -1;}
592 static inline void pci_disable_msix(struct pci_dev *dev) {}
593 static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev) {}
595 extern void pci_scan_msi_device(struct pci_dev *dev);
596 extern int pci_enable_msi(struct pci_dev *dev);
597 extern void pci_disable_msi(struct pci_dev *dev);
598 extern int pci_enable_msix(struct pci_dev* dev,
599 struct msix_entry *entries, int nvec);
600 extern void pci_disable_msix(struct pci_dev *dev);
601 extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
604 extern void pci_block_user_cfg_access(struct pci_dev *dev);
605 extern void pci_unblock_user_cfg_access(struct pci_dev *dev);
608 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
609 * a PCI domain is defined to be a set of PCI busses which share
610 * configuration space.
612 #ifndef CONFIG_PCI_DOMAINS
613 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
614 static inline int pci_proc_domain(struct pci_bus *bus)
620 #else /* CONFIG_PCI is not enabled */
623 * If the system does not have PCI, clearly these return errors. Define
624 * these as simple inline functions to avoid hair in drivers.
627 #define _PCI_NOP(o,s,t) \
628 static inline int pci_##o##_config_##s (struct pci_dev *dev, int where, t val) \
629 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
630 #define _PCI_NOP_ALL(o,x) _PCI_NOP(o,byte,u8 x) \
631 _PCI_NOP(o,word,u16 x) \
632 _PCI_NOP(o,dword,u32 x)
633 _PCI_NOP_ALL(read, *)
636 static inline struct pci_dev *pci_find_device(unsigned int vendor, unsigned int device, const struct pci_dev *from)
639 static inline struct pci_dev *pci_find_slot(unsigned int bus, unsigned int devfn)
642 static inline struct pci_dev *pci_get_device (unsigned int vendor, unsigned int device, struct pci_dev *from)
645 static inline struct pci_dev *pci_get_subsys (unsigned int vendor, unsigned int device,
646 unsigned int ss_vendor, unsigned int ss_device, struct pci_dev *from)
649 static inline struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from)
652 #define pci_dev_present(ids) (0)
653 #define pci_dev_put(dev) do { } while (0)
655 static inline void pci_set_master(struct pci_dev *dev) { }
656 static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
657 static inline void pci_disable_device(struct pci_dev *dev) { }
658 static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask) { return -EIO; }
659 static inline int pci_assign_resource(struct pci_dev *dev, int i) { return -EBUSY;}
660 static inline int __pci_register_driver(struct pci_driver *drv, struct module *owner) { return 0;}
661 static inline int pci_register_driver(struct pci_driver *drv) { return 0;}
662 static inline void pci_unregister_driver(struct pci_driver *drv) { }
663 static inline int pci_find_capability (struct pci_dev *dev, int cap) {return 0; }
664 static inline int pci_find_next_capability (struct pci_dev *dev, u8 post, int cap) { return 0; }
665 static inline const struct pci_device_id *pci_match_device(const struct pci_device_id *ids, const struct pci_dev *dev) { return NULL; }
667 /* Power management related routines */
668 static inline int pci_save_state(struct pci_dev *dev) { return 0; }
669 static inline int pci_restore_state(struct pci_dev *dev) { return 0; }
670 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state) { return 0; }
671 static inline pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state) { return PCI_D0; }
672 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable) { return 0; }
674 #define isa_bridge ((struct pci_dev *)NULL)
676 #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
678 static inline void pci_block_user_cfg_access(struct pci_dev *dev) { }
679 static inline void pci_unblock_user_cfg_access(struct pci_dev *dev) { }
681 #endif /* CONFIG_PCI */
683 /* Include architecture-dependent settings and functions */
687 /* these helpers provide future and backwards compatibility
688 * for accessing popular PCI BAR info */
689 #define pci_resource_start(dev,bar) ((dev)->resource[(bar)].start)
690 #define pci_resource_end(dev,bar) ((dev)->resource[(bar)].end)
691 #define pci_resource_flags(dev,bar) ((dev)->resource[(bar)].flags)
692 #define pci_resource_len(dev,bar) \
693 ((pci_resource_start((dev),(bar)) == 0 && \
694 pci_resource_end((dev),(bar)) == \
695 pci_resource_start((dev),(bar))) ? 0 : \
697 (pci_resource_end((dev),(bar)) - \
698 pci_resource_start((dev),(bar)) + 1))
700 /* Similar to the helpers above, these manipulate per-pci_dev
701 * driver-specific data. They are really just a wrapper around
702 * the generic device structure functions of these calls.
704 static inline void *pci_get_drvdata (struct pci_dev *pdev)
706 return dev_get_drvdata(&pdev->dev);
709 static inline void pci_set_drvdata (struct pci_dev *pdev, void *data)
711 dev_set_drvdata(&pdev->dev, data);
714 /* If you want to know what to call your pci_dev, ask this function.
715 * Again, it's a wrapper around the generic device.
717 static inline char *pci_name(struct pci_dev *pdev)
719 return pdev->dev.bus_id;
723 /* Some archs don't want to expose struct resource to userland as-is
726 #ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
727 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
728 const struct resource *rsrc, u64 *start, u64 *end)
730 *start = rsrc->start;
733 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
737 * The world is not perfect and supplies us with broken PCI devices.
738 * For at least a part of these bugs we need a work-around, so both
739 * generic (drivers/pci/quirks.c) and per-architecture code can define
740 * fixup hooks to be called for particular buggy devices.
744 u16 vendor, device; /* You can use PCI_ANY_ID here of course */
745 void (*hook)(struct pci_dev *dev);
748 enum pci_fixup_pass {
749 pci_fixup_early, /* Before probing BARs */
750 pci_fixup_header, /* After reading configuration header */
751 pci_fixup_final, /* Final phase of device fixups */
752 pci_fixup_enable, /* pci_enable_device() time */
755 /* Anonymous variables would be nice... */
756 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook) \
757 static const struct pci_fixup __pci_fixup_##name __attribute_used__ \
758 __attribute__((__section__(#section))) = { vendor, device, hook };
759 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
760 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
761 vendor##device##hook, vendor, device, hook)
762 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
763 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
764 vendor##device##hook, vendor, device, hook)
765 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
766 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
767 vendor##device##hook, vendor, device, hook)
768 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
769 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
770 vendor##device##hook, vendor, device, hook)
773 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
775 extern int pci_pci_problems;
776 #define PCIPCI_FAIL 1
777 #define PCIPCI_TRITON 2
778 #define PCIPCI_NATOMA 4
779 #define PCIPCI_VIAETBF 8
780 #define PCIPCI_VSFX 16
781 #define PCIPCI_ALIMAGIK 32
783 #endif /* __KERNEL__ */
784 #endif /* LINUX_PCI_H */