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>
24 * The PCI interface treats multi-function devices as independent
25 * devices. The slot/function address of each device is encoded
26 * in a single byte as follows:
31 #define PCI_DEVFN(slot,func) ((((slot) & 0x1f) << 3) | ((func) & 0x07))
32 #define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f)
33 #define PCI_FUNC(devfn) ((devfn) & 0x07)
35 /* Ioctls for /proc/bus/pci/X/Y nodes. */
36 #define PCIIOC_BASE ('P' << 24 | 'C' << 16 | 'I' << 8)
37 #define PCIIOC_CONTROLLER (PCIIOC_BASE | 0x00) /* Get controller for PCI device. */
38 #define PCIIOC_MMAP_IS_IO (PCIIOC_BASE | 0x01) /* Set mmap state to I/O space. */
39 #define PCIIOC_MMAP_IS_MEM (PCIIOC_BASE | 0x02) /* Set mmap state to MEM space. */
40 #define PCIIOC_WRITE_COMBINE (PCIIOC_BASE | 0x03) /* Enable/disable write-combining. */
44 #include <linux/mod_devicetable.h>
46 #include <linux/types.h>
47 #include <linux/ioport.h>
48 #include <linux/list.h>
49 #include <linux/compiler.h>
50 #include <linux/errno.h>
51 #include <asm/atomic.h>
52 #include <linux/device.h>
54 /* Include the ID list */
55 #include <linux/pci_ids.h>
57 /* File state for mmap()s on /proc/bus/pci/X/Y */
63 /* This defines the direction arg to the DMA mapping routines. */
64 #define PCI_DMA_BIDIRECTIONAL 0
65 #define PCI_DMA_TODEVICE 1
66 #define PCI_DMA_FROMDEVICE 2
67 #define PCI_DMA_NONE 3
69 #define DEVICE_COUNT_COMPATIBLE 4
70 #define DEVICE_COUNT_RESOURCE 12
72 typedef int __bitwise pci_power_t;
74 #define PCI_D0 ((pci_power_t __force) 0)
75 #define PCI_D1 ((pci_power_t __force) 1)
76 #define PCI_D2 ((pci_power_t __force) 2)
77 #define PCI_D3hot ((pci_power_t __force) 3)
78 #define PCI_D3cold ((pci_power_t __force) 4)
79 #define PCI_UNKNOWN ((pci_power_t __force) 5)
80 #define PCI_POWER_ERROR ((pci_power_t __force) -1)
82 /** The pci_channel state describes connectivity between the CPU and
83 * the pci device. If some PCI bus between here and the pci device
84 * has crashed or locked up, this info is reflected here.
86 typedef unsigned int __bitwise pci_channel_state_t;
88 enum pci_channel_state {
89 /* I/O channel is in normal state */
90 pci_channel_io_normal = (__force pci_channel_state_t) 1,
92 /* I/O to channel is blocked */
93 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
95 /* PCI card is dead */
96 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
99 typedef unsigned short __bitwise pci_bus_flags_t;
101 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
104 struct pci_cap_saved_state {
105 struct hlist_node next;
111 * The pci_dev structure is used to describe PCI devices.
114 struct list_head global_list; /* node in list of all PCI devices */
115 struct list_head bus_list; /* node in per-bus list */
116 struct pci_bus *bus; /* bus this device is on */
117 struct pci_bus *subordinate; /* bus this device bridges to */
119 void *sysdata; /* hook for sys-specific extension */
120 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
122 unsigned int devfn; /* encoded device & function index */
123 unsigned short vendor;
124 unsigned short device;
125 unsigned short subsystem_vendor;
126 unsigned short subsystem_device;
127 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
128 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
129 u8 rom_base_reg; /* which config register controls the ROM */
130 u8 pin; /* which interrupt pin this device uses */
132 struct pci_driver *driver; /* which driver has allocated this device */
133 u64 dma_mask; /* Mask of the bits of bus address this
134 device implements. Normally this is
135 0xffffffff. You only need to change
136 this if your device has broken DMA
137 or supports 64-bit transfers. */
139 pci_power_t current_state; /* Current operating state. In ACPI-speak,
140 this is D0-D3, D0 being fully functional,
143 pci_channel_state_t error_state; /* current connectivity state */
144 struct device dev; /* Generic device interface */
146 /* device is compatible with these IDs */
147 unsigned short vendor_compatible[DEVICE_COUNT_COMPATIBLE];
148 unsigned short device_compatible[DEVICE_COUNT_COMPATIBLE];
150 int cfg_size; /* Size of configuration space */
153 * Instead of touching interrupt line and base address registers
154 * directly, use the values stored here. They might be different!
157 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
159 /* These fields are used by common fixups */
160 unsigned int transparent:1; /* Transparent PCI bridge */
161 unsigned int multifunction:1;/* Part of multi-function device */
162 /* keep track of device state */
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;
170 unsigned int is_managed:1;
171 atomic_t enable_cnt; /* pci_enable_device has been called */
173 u32 saved_config_space[16]; /* config space saved at suspend time */
174 struct hlist_head saved_cap_space;
175 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
176 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
177 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
178 #ifdef CONFIG_PCI_MSI
179 unsigned int first_msi_irq;
183 #define pci_dev_g(n) list_entry(n, struct pci_dev, global_list)
184 #define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
185 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
186 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
188 static inline int pci_channel_offline(struct pci_dev *pdev)
190 return (pdev->error_state != pci_channel_io_normal);
193 static inline struct pci_cap_saved_state *pci_find_saved_cap(
194 struct pci_dev *pci_dev,char cap)
196 struct pci_cap_saved_state *tmp;
197 struct hlist_node *pos;
199 hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) {
200 if (tmp->cap_nr == cap)
206 static inline void pci_add_saved_cap(struct pci_dev *pci_dev,
207 struct pci_cap_saved_state *new_cap)
209 hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space);
212 static inline void pci_remove_saved_cap(struct pci_cap_saved_state *cap)
214 hlist_del(&cap->next);
218 * For PCI devices, the region numbers are assigned this way:
220 * 0-5 standard PCI regions
222 * 7-10 bridges: address space assigned to buses behind the bridge
225 #define PCI_ROM_RESOURCE 6
226 #define PCI_BRIDGE_RESOURCES 7
227 #define PCI_NUM_RESOURCES 11
229 #ifndef PCI_BUS_NUM_RESOURCES
230 #define PCI_BUS_NUM_RESOURCES 8
233 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
236 struct list_head node; /* node in list of buses */
237 struct pci_bus *parent; /* parent bus this bridge is on */
238 struct list_head children; /* list of child buses */
239 struct list_head devices; /* list of devices on this bus */
240 struct pci_dev *self; /* bridge device as seen by parent */
241 struct resource *resource[PCI_BUS_NUM_RESOURCES];
242 /* address space routed to this bus */
244 struct pci_ops *ops; /* configuration access functions */
245 void *sysdata; /* hook for sys-specific extension */
246 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
248 unsigned char number; /* bus number */
249 unsigned char primary; /* number of primary bridge */
250 unsigned char secondary; /* number of secondary bridge */
251 unsigned char subordinate; /* max number of subordinate buses */
255 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
256 pci_bus_flags_t bus_flags; /* Inherited by child busses */
257 struct device *bridge;
258 struct class_device class_dev;
259 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
260 struct bin_attribute *legacy_mem; /* legacy mem */
263 #define pci_bus_b(n) list_entry(n, struct pci_bus, node)
264 #define to_pci_bus(n) container_of(n, struct pci_bus, class_dev)
267 * Error values that may be returned by PCI functions.
269 #define PCIBIOS_SUCCESSFUL 0x00
270 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
271 #define PCIBIOS_BAD_VENDOR_ID 0x83
272 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
273 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
274 #define PCIBIOS_SET_FAILED 0x88
275 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
277 /* Low-level architecture-dependent routines */
280 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
281 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
285 int (*read)(unsigned int domain, unsigned int bus, unsigned int devfn,
286 int reg, int len, u32 *val);
287 int (*write)(unsigned int domain, unsigned int bus, unsigned int devfn,
288 int reg, int len, u32 val);
291 extern struct pci_raw_ops *raw_pci_ops;
293 struct pci_bus_region {
299 spinlock_t lock; /* protects list, index */
300 struct list_head list; /* for IDs added at runtime */
301 unsigned int use_driver_data:1; /* pci_driver->driver_data is used */
304 /* ---------------------------------------------------------------- */
305 /** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
306 * a set fof callbacks in struct pci_error_handlers, then that device driver
307 * will be notified of PCI bus errors, and will be driven to recovery
308 * when an error occurs.
311 typedef unsigned int __bitwise pci_ers_result_t;
313 enum pci_ers_result {
314 /* no result/none/not supported in device driver */
315 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
317 /* Device driver can recover without slot reset */
318 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
320 /* Device driver wants slot to be reset. */
321 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
323 /* Device has completely failed, is unrecoverable */
324 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
326 /* Device driver is fully recovered and operational */
327 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
330 /* PCI bus error event callbacks */
331 struct pci_error_handlers
333 /* PCI bus error detected on this device */
334 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
335 enum pci_channel_state error);
337 /* MMIO has been re-enabled, but not DMA */
338 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
340 /* PCI Express link has been reset */
341 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
343 /* PCI slot has been reset */
344 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
346 /* Device driver may resume normal operations */
347 void (*resume)(struct pci_dev *dev);
350 /* ---------------------------------------------------------------- */
354 struct list_head node;
356 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
357 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
358 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
359 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
360 int (*suspend_late) (struct pci_dev *dev, pm_message_t state);
361 int (*resume_early) (struct pci_dev *dev);
362 int (*resume) (struct pci_dev *dev); /* Device woken up */
363 int (*enable_wake) (struct pci_dev *dev, pci_power_t state, int enable); /* Enable wake event */
364 void (*shutdown) (struct pci_dev *dev);
366 struct pci_error_handlers *err_handler;
367 struct device_driver driver;
368 struct pci_dynids dynids;
370 int multithread_probe;
373 #define to_pci_driver(drv) container_of(drv,struct pci_driver, driver)
376 * PCI_DEVICE - macro used to describe a specific pci device
377 * @vend: the 16 bit PCI Vendor ID
378 * @dev: the 16 bit PCI Device ID
380 * This macro is used to create a struct pci_device_id that matches a
381 * specific device. The subvendor and subdevice fields will be set to
384 #define PCI_DEVICE(vend,dev) \
385 .vendor = (vend), .device = (dev), \
386 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
389 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
390 * @dev_class: the class, subclass, prog-if triple for this device
391 * @dev_class_mask: the class mask for this device
393 * This macro is used to create a struct pci_device_id that matches a
394 * specific PCI class. The vendor, device, subvendor, and subdevice
395 * fields will be set to PCI_ANY_ID.
397 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
398 .class = (dev_class), .class_mask = (dev_class_mask), \
399 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
400 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
403 * pci_module_init is obsolete, this stays here till we fix up all usages of it
406 #define pci_module_init pci_register_driver
409 * PCI_VDEVICE - macro used to describe a specific pci device in short form
410 * @vend: the vendor name
411 * @dev: the 16 bit PCI Device ID
413 * This macro is used to create a struct pci_device_id that matches a
414 * specific PCI device. The subvendor, and subdevice fields will be set
415 * to PCI_ANY_ID. The macro allows the next field to follow as the device
419 #define PCI_VDEVICE(vendor, device) \
420 PCI_VENDOR_ID_##vendor, (device), \
421 PCI_ANY_ID, PCI_ANY_ID, 0, 0
423 /* these external functions are only available when PCI support is enabled */
426 extern struct bus_type pci_bus_type;
428 /* Do NOT directly access these two variables, unless you are arch specific pci
429 * code, or pci core code. */
430 extern struct list_head pci_root_buses; /* list of all known PCI buses */
431 extern struct list_head pci_devices; /* list of all devices */
433 void pcibios_fixup_bus(struct pci_bus *);
434 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
435 char *pcibios_setup (char *str);
437 /* Used only when drivers/pci/setup.c is used */
438 void pcibios_align_resource(void *, struct resource *, resource_size_t,
440 void pcibios_update_irq(struct pci_dev *, int irq);
442 /* Generic PCI functions used internally */
444 extern struct pci_bus *pci_find_bus(int domain, int busnr);
445 void pci_bus_add_devices(struct pci_bus *bus);
446 struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus, struct pci_ops *ops, void *sysdata);
447 static inline struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata)
449 struct pci_bus *root_bus;
450 root_bus = pci_scan_bus_parented(NULL, bus, ops, sysdata);
452 pci_bus_add_devices(root_bus);
455 struct pci_bus *pci_create_bus(struct device *parent, int bus, struct pci_ops *ops, void *sysdata);
456 struct pci_bus * pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, int busnr);
457 int pci_scan_slot(struct pci_bus *bus, int devfn);
458 struct pci_dev * pci_scan_single_device(struct pci_bus *bus, int devfn);
459 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
460 unsigned int pci_scan_child_bus(struct pci_bus *bus);
461 int __must_check pci_bus_add_device(struct pci_dev *dev);
462 void pci_read_bridge_bases(struct pci_bus *child);
463 struct resource *pci_find_parent_resource(const struct pci_dev *dev, struct resource *res);
464 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
465 extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
466 extern void pci_dev_put(struct pci_dev *dev);
467 extern void pci_remove_bus(struct pci_bus *b);
468 extern void pci_remove_bus_device(struct pci_dev *dev);
469 extern void pci_stop_bus_device(struct pci_dev *dev);
470 void pci_setup_cardbus(struct pci_bus *bus);
471 extern void pci_sort_breadthfirst(void);
473 /* Generic PCI functions exported to card drivers */
475 struct pci_dev __deprecated *pci_find_device (unsigned int vendor, unsigned int device, const struct pci_dev *from);
476 struct pci_dev *pci_find_slot (unsigned int bus, unsigned int devfn);
477 int pci_find_capability (struct pci_dev *dev, int cap);
478 int pci_find_next_capability (struct pci_dev *dev, u8 pos, int cap);
479 int pci_find_ext_capability (struct pci_dev *dev, int cap);
480 int pci_find_ht_capability (struct pci_dev *dev, int ht_cap);
481 int pci_find_next_ht_capability (struct pci_dev *dev, int pos, int ht_cap);
482 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
484 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
485 struct pci_dev *from);
486 struct pci_dev *pci_get_device_reverse(unsigned int vendor, unsigned int device,
487 struct pci_dev *from);
489 struct pci_dev *pci_get_subsys (unsigned int vendor, unsigned int device,
490 unsigned int ss_vendor, unsigned int ss_device,
491 struct pci_dev *from);
492 struct pci_dev *pci_get_slot (struct pci_bus *bus, unsigned int devfn);
493 struct pci_dev *pci_get_bus_and_slot (unsigned int bus, unsigned int devfn);
494 struct pci_dev *pci_get_class (unsigned int class, struct pci_dev *from);
495 int pci_dev_present(const struct pci_device_id *ids);
496 const struct pci_device_id *pci_find_present(const struct pci_device_id *ids);
498 int pci_bus_read_config_byte (struct pci_bus *bus, unsigned int devfn, int where, u8 *val);
499 int pci_bus_read_config_word (struct pci_bus *bus, unsigned int devfn, int where, u16 *val);
500 int pci_bus_read_config_dword (struct pci_bus *bus, unsigned int devfn, int where, u32 *val);
501 int pci_bus_write_config_byte (struct pci_bus *bus, unsigned int devfn, int where, u8 val);
502 int pci_bus_write_config_word (struct pci_bus *bus, unsigned int devfn, int where, u16 val);
503 int pci_bus_write_config_dword (struct pci_bus *bus, unsigned int devfn, int where, u32 val);
505 static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val)
507 return pci_bus_read_config_byte (dev->bus, dev->devfn, where, val);
509 static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val)
511 return pci_bus_read_config_word (dev->bus, dev->devfn, where, val);
513 static inline int pci_read_config_dword(struct pci_dev *dev, int where, u32 *val)
515 return pci_bus_read_config_dword (dev->bus, dev->devfn, where, val);
517 static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val)
519 return pci_bus_write_config_byte (dev->bus, dev->devfn, where, val);
521 static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val)
523 return pci_bus_write_config_word (dev->bus, dev->devfn, where, val);
525 static inline int pci_write_config_dword(struct pci_dev *dev, int where, u32 val)
527 return pci_bus_write_config_dword (dev->bus, dev->devfn, where, val);
530 int __must_check pci_enable_device(struct pci_dev *dev);
531 int __must_check pci_enable_device_bars(struct pci_dev *dev, int mask);
532 int __must_check pcim_enable_device(struct pci_dev *pdev);
533 void pcim_pin_device(struct pci_dev *pdev);
535 static inline int pci_is_managed(struct pci_dev *pdev)
537 return pdev->is_managed;
540 void pci_disable_device(struct pci_dev *dev);
541 void pci_set_master(struct pci_dev *dev);
542 #define HAVE_PCI_SET_MWI
543 int __must_check pci_set_mwi(struct pci_dev *dev);
544 void pci_clear_mwi(struct pci_dev *dev);
545 void pci_intx(struct pci_dev *dev, int enable);
546 int pci_set_dma_mask(struct pci_dev *dev, u64 mask);
547 int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask);
548 void pci_update_resource(struct pci_dev *dev, struct resource *res, int resno);
549 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
550 int __must_check pci_assign_resource_fixed(struct pci_dev *dev, int i);
551 void pci_restore_bars(struct pci_dev *dev);
552 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
554 /* ROM control related routines */
555 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
556 void __iomem __must_check *pci_map_rom_copy(struct pci_dev *pdev, size_t *size);
557 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
558 void pci_remove_rom(struct pci_dev *pdev);
560 /* Power management related routines */
561 int pci_save_state(struct pci_dev *dev);
562 int pci_restore_state(struct pci_dev *dev);
563 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
564 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
565 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable);
567 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
568 void pci_bus_assign_resources(struct pci_bus *bus);
569 void pci_bus_size_bridges(struct pci_bus *bus);
570 int pci_claim_resource(struct pci_dev *, int);
571 void pci_assign_unassigned_resources(void);
572 void pdev_enable_device(struct pci_dev *);
573 void pdev_sort_resources(struct pci_dev *, struct resource_list *);
574 void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
575 int (*)(struct pci_dev *, u8, u8));
576 #define HAVE_PCI_REQ_REGIONS 2
577 int __must_check pci_request_regions(struct pci_dev *, const char *);
578 void pci_release_regions(struct pci_dev *);
579 int __must_check pci_request_region(struct pci_dev *, int, const char *);
580 void pci_release_region(struct pci_dev *, int);
581 int pci_request_selected_regions(struct pci_dev *, int, const char *);
582 void pci_release_selected_regions(struct pci_dev *, int);
584 /* drivers/pci/bus.c */
585 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
586 struct resource *res, resource_size_t size,
587 resource_size_t align, resource_size_t min,
588 unsigned int type_mask,
589 void (*alignf)(void *, struct resource *,
590 resource_size_t, resource_size_t),
592 void pci_enable_bridges(struct pci_bus *bus);
594 /* Proper probing supporting hot-pluggable devices */
595 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
596 const char *mod_name);
597 static inline int __must_check pci_register_driver(struct pci_driver *driver)
599 return __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME);
602 void pci_unregister_driver(struct pci_driver *);
603 void pci_remove_behind_bridge(struct pci_dev *);
604 struct pci_driver *pci_dev_driver(const struct pci_dev *);
605 const struct pci_device_id *pci_match_device(struct pci_driver *drv, struct pci_dev *dev);
606 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, struct pci_dev *dev);
607 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max, int pass);
609 void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *),
611 int pci_cfg_space_size(struct pci_dev *dev);
612 unsigned char pci_bus_max_busnr(struct pci_bus* bus);
614 /* kmem_cache style wrapper around pci_alloc_consistent() */
616 #include <linux/dmapool.h>
618 #define pci_pool dma_pool
619 #define pci_pool_create(name, pdev, size, align, allocation) \
620 dma_pool_create(name, &pdev->dev, size, align, allocation)
621 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
622 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
623 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
625 enum pci_dma_burst_strategy {
626 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
627 strategy_parameter is N/A */
628 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
630 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
631 strategy_parameter byte boundaries */
635 u16 vector; /* kernel uses to write allocated vector */
636 u16 entry; /* driver uses to specify entry, OS writes */
640 #ifndef CONFIG_PCI_MSI
641 static inline int pci_enable_msi(struct pci_dev *dev) {return -1;}
642 static inline void pci_disable_msi(struct pci_dev *dev) {}
643 static inline int pci_enable_msix(struct pci_dev* dev,
644 struct msix_entry *entries, int nvec) {return -1;}
645 static inline void pci_disable_msix(struct pci_dev *dev) {}
646 static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev) {}
648 extern int pci_enable_msi(struct pci_dev *dev);
649 extern void pci_disable_msi(struct pci_dev *dev);
650 extern int pci_enable_msix(struct pci_dev* dev,
651 struct msix_entry *entries, int nvec);
652 extern void pci_disable_msix(struct pci_dev *dev);
653 extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
657 /* The functions a driver should call */
658 int ht_create_irq(struct pci_dev *dev, int idx);
659 void ht_destroy_irq(unsigned int irq);
660 #endif /* CONFIG_HT_IRQ */
662 extern void pci_block_user_cfg_access(struct pci_dev *dev);
663 extern void pci_unblock_user_cfg_access(struct pci_dev *dev);
666 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
667 * a PCI domain is defined to be a set of PCI busses which share
668 * configuration space.
670 #ifndef CONFIG_PCI_DOMAINS
671 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
672 static inline int pci_proc_domain(struct pci_bus *bus)
678 #else /* CONFIG_PCI is not enabled */
681 * If the system does not have PCI, clearly these return errors. Define
682 * these as simple inline functions to avoid hair in drivers.
685 #define _PCI_NOP(o,s,t) \
686 static inline int pci_##o##_config_##s (struct pci_dev *dev, int where, t val) \
687 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
688 #define _PCI_NOP_ALL(o,x) _PCI_NOP(o,byte,u8 x) \
689 _PCI_NOP(o,word,u16 x) \
690 _PCI_NOP(o,dword,u32 x)
691 _PCI_NOP_ALL(read, *)
694 static inline struct pci_dev *pci_find_device(unsigned int vendor, unsigned int device, const struct pci_dev *from)
697 static inline struct pci_dev *pci_find_slot(unsigned int bus, unsigned int devfn)
700 static inline struct pci_dev *pci_get_device(unsigned int vendor,
701 unsigned int device, struct pci_dev *from)
704 static inline struct pci_dev *pci_get_device_reverse(unsigned int vendor,
705 unsigned int device, struct pci_dev *from)
708 static inline struct pci_dev *pci_get_subsys (unsigned int vendor, unsigned int device,
709 unsigned int ss_vendor, unsigned int ss_device, struct pci_dev *from)
712 static inline struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from)
715 #define pci_dev_present(ids) (0)
716 #define pci_find_present(ids) (NULL)
717 #define pci_dev_put(dev) do { } while (0)
719 static inline void pci_set_master(struct pci_dev *dev) { }
720 static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
721 static inline void pci_disable_device(struct pci_dev *dev) { }
722 static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask) { return -EIO; }
723 static inline int pci_assign_resource(struct pci_dev *dev, int i) { return -EBUSY;}
724 static inline int __pci_register_driver(struct pci_driver *drv, struct module *owner) { return 0;}
725 static inline int pci_register_driver(struct pci_driver *drv) { return 0;}
726 static inline void pci_unregister_driver(struct pci_driver *drv) { }
727 static inline int pci_find_capability (struct pci_dev *dev, int cap) {return 0; }
728 static inline int pci_find_next_capability (struct pci_dev *dev, u8 post, int cap) { return 0; }
729 static inline int pci_find_ext_capability (struct pci_dev *dev, int cap) {return 0; }
730 static inline const struct pci_device_id *pci_match_device(const struct pci_device_id *ids, const struct pci_dev *dev) { return NULL; }
732 /* Power management related routines */
733 static inline int pci_save_state(struct pci_dev *dev) { return 0; }
734 static inline int pci_restore_state(struct pci_dev *dev) { return 0; }
735 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state) { return 0; }
736 static inline pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state) { return PCI_D0; }
737 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable) { return 0; }
739 #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
741 static inline void pci_block_user_cfg_access(struct pci_dev *dev) { }
742 static inline void pci_unblock_user_cfg_access(struct pci_dev *dev) { }
744 #endif /* CONFIG_PCI */
746 /* Include architecture-dependent settings and functions */
750 /* these helpers provide future and backwards compatibility
751 * for accessing popular PCI BAR info */
752 #define pci_resource_start(dev,bar) ((dev)->resource[(bar)].start)
753 #define pci_resource_end(dev,bar) ((dev)->resource[(bar)].end)
754 #define pci_resource_flags(dev,bar) ((dev)->resource[(bar)].flags)
755 #define pci_resource_len(dev,bar) \
756 ((pci_resource_start((dev),(bar)) == 0 && \
757 pci_resource_end((dev),(bar)) == \
758 pci_resource_start((dev),(bar))) ? 0 : \
760 (pci_resource_end((dev),(bar)) - \
761 pci_resource_start((dev),(bar)) + 1))
763 /* Similar to the helpers above, these manipulate per-pci_dev
764 * driver-specific data. They are really just a wrapper around
765 * the generic device structure functions of these calls.
767 static inline void *pci_get_drvdata (struct pci_dev *pdev)
769 return dev_get_drvdata(&pdev->dev);
772 static inline void pci_set_drvdata (struct pci_dev *pdev, void *data)
774 dev_set_drvdata(&pdev->dev, data);
777 /* If you want to know what to call your pci_dev, ask this function.
778 * Again, it's a wrapper around the generic device.
780 static inline char *pci_name(struct pci_dev *pdev)
782 return pdev->dev.bus_id;
786 /* Some archs don't want to expose struct resource to userland as-is
789 #ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
790 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
791 const struct resource *rsrc, resource_size_t *start,
792 resource_size_t *end)
794 *start = rsrc->start;
797 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
801 * The world is not perfect and supplies us with broken PCI devices.
802 * For at least a part of these bugs we need a work-around, so both
803 * generic (drivers/pci/quirks.c) and per-architecture code can define
804 * fixup hooks to be called for particular buggy devices.
808 u16 vendor, device; /* You can use PCI_ANY_ID here of course */
809 void (*hook)(struct pci_dev *dev);
812 enum pci_fixup_pass {
813 pci_fixup_early, /* Before probing BARs */
814 pci_fixup_header, /* After reading configuration header */
815 pci_fixup_final, /* Final phase of device fixups */
816 pci_fixup_enable, /* pci_enable_device() time */
817 pci_fixup_resume, /* pci_enable_device() time */
820 /* Anonymous variables would be nice... */
821 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook) \
822 static const struct pci_fixup __pci_fixup_##name __attribute_used__ \
823 __attribute__((__section__(#section))) = { vendor, device, hook };
824 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
825 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
826 vendor##device##hook, vendor, device, hook)
827 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
828 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
829 vendor##device##hook, vendor, device, hook)
830 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
831 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
832 vendor##device##hook, vendor, device, hook)
833 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
834 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
835 vendor##device##hook, vendor, device, hook)
836 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
837 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
838 resume##vendor##device##hook, vendor, device, hook)
841 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
843 void __iomem * pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
844 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
845 void __iomem * const * pcim_iomap_table(struct pci_dev *pdev);
846 int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name);
848 extern int pci_pci_problems;
849 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
850 #define PCIPCI_TRITON 2
851 #define PCIPCI_NATOMA 4
852 #define PCIPCI_VIAETBF 8
853 #define PCIPCI_VSFX 16
854 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
855 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
857 #endif /* __KERNEL__ */
858 #endif /* LINUX_PCI_H */