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_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 int __bitwise pcie_reset_state_t;
100 enum pcie_reset_state {
101 /* Reset is NOT asserted (Use to deassert reset) */
102 pcie_deassert_reset = (__force pcie_reset_state_t) 1,
104 /* Use #PERST to reset PCI-E device */
105 pcie_warm_reset = (__force pcie_reset_state_t) 2,
107 /* Use PCI-E Hot Reset to reset device */
108 pcie_hot_reset = (__force pcie_reset_state_t) 3
111 typedef unsigned short __bitwise pci_dev_flags_t;
113 /* INTX_DISABLE in PCI_COMMAND register disables MSI
116 PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) 1,
119 typedef unsigned short __bitwise pci_bus_flags_t;
121 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
122 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
125 struct pci_cap_saved_state {
126 struct hlist_node next;
132 * The pci_dev structure is used to describe PCI devices.
135 struct list_head global_list; /* node in list of all PCI devices */
136 struct list_head bus_list; /* node in per-bus list */
137 struct pci_bus *bus; /* bus this device is on */
138 struct pci_bus *subordinate; /* bus this device bridges to */
140 void *sysdata; /* hook for sys-specific extension */
141 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
143 unsigned int devfn; /* encoded device & function index */
144 unsigned short vendor;
145 unsigned short device;
146 unsigned short subsystem_vendor;
147 unsigned short subsystem_device;
148 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
149 u8 revision; /* PCI revision, low byte of class word */
150 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
151 u8 pcie_type; /* PCI-E device/port type */
152 u8 rom_base_reg; /* which config register controls the ROM */
153 u8 pin; /* which interrupt pin this device uses */
155 struct pci_driver *driver; /* which driver has allocated this device */
156 u64 dma_mask; /* Mask of the bits of bus address this
157 device implements. Normally this is
158 0xffffffff. You only need to change
159 this if your device has broken DMA
160 or supports 64-bit transfers. */
162 struct device_dma_parameters dma_parms;
164 pci_power_t current_state; /* Current operating state. In ACPI-speak,
165 this is D0-D3, D0 being fully functional,
168 pci_channel_state_t error_state; /* current connectivity state */
169 struct device dev; /* Generic device interface */
171 int cfg_size; /* Size of configuration space */
174 * Instead of touching interrupt line and base address registers
175 * directly, use the values stored here. They might be different!
178 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
180 /* These fields are used by common fixups */
181 unsigned int transparent:1; /* Transparent PCI bridge */
182 unsigned int multifunction:1;/* Part of multi-function device */
183 /* keep track of device state */
184 unsigned int is_busmaster:1; /* device is busmaster */
185 unsigned int no_msi:1; /* device may not use msi */
186 unsigned int no_d1d2:1; /* only allow d0 or d3 */
187 unsigned int block_ucfg_access:1; /* userspace config space access is blocked */
188 unsigned int broken_parity_status:1; /* Device generates false positive parity */
189 unsigned int msi_enabled:1;
190 unsigned int msix_enabled:1;
191 unsigned int is_managed:1;
192 unsigned int is_pcie:1;
193 pci_dev_flags_t dev_flags;
194 atomic_t enable_cnt; /* pci_enable_device has been called */
196 u32 saved_config_space[16]; /* config space saved at suspend time */
197 struct hlist_head saved_cap_space;
198 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
199 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
200 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
201 #ifdef CONFIG_PCI_MSI
202 struct list_head msi_list;
206 extern struct pci_dev *alloc_pci_dev(void);
208 #define pci_dev_g(n) list_entry(n, struct pci_dev, global_list)
209 #define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
210 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
211 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
213 static inline int pci_channel_offline(struct pci_dev *pdev)
215 return (pdev->error_state != pci_channel_io_normal);
218 static inline struct pci_cap_saved_state *pci_find_saved_cap(
219 struct pci_dev *pci_dev, char cap)
221 struct pci_cap_saved_state *tmp;
222 struct hlist_node *pos;
224 hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) {
225 if (tmp->cap_nr == cap)
231 static inline void pci_add_saved_cap(struct pci_dev *pci_dev,
232 struct pci_cap_saved_state *new_cap)
234 hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space);
238 * For PCI devices, the region numbers are assigned this way:
240 * 0-5 standard PCI regions
242 * 7-10 bridges: address space assigned to buses behind the bridge
245 #define PCI_ROM_RESOURCE 6
246 #define PCI_BRIDGE_RESOURCES 7
247 #define PCI_NUM_RESOURCES 11
249 #ifndef PCI_BUS_NUM_RESOURCES
250 #define PCI_BUS_NUM_RESOURCES 8
253 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
256 struct list_head node; /* node in list of buses */
257 struct pci_bus *parent; /* parent bus this bridge is on */
258 struct list_head children; /* list of child buses */
259 struct list_head devices; /* list of devices on this bus */
260 struct pci_dev *self; /* bridge device as seen by parent */
261 struct resource *resource[PCI_BUS_NUM_RESOURCES];
262 /* address space routed to this bus */
264 struct pci_ops *ops; /* configuration access functions */
265 void *sysdata; /* hook for sys-specific extension */
266 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
268 unsigned char number; /* bus number */
269 unsigned char primary; /* number of primary bridge */
270 unsigned char secondary; /* number of secondary bridge */
271 unsigned char subordinate; /* max number of subordinate buses */
275 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
276 pci_bus_flags_t bus_flags; /* Inherited by child busses */
277 struct device *bridge;
279 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
280 struct bin_attribute *legacy_mem; /* legacy mem */
281 unsigned int is_added:1;
284 #define pci_bus_b(n) list_entry(n, struct pci_bus, node)
285 #define to_pci_bus(n) container_of(n, struct pci_bus, dev)
288 * Error values that may be returned by PCI functions.
290 #define PCIBIOS_SUCCESSFUL 0x00
291 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
292 #define PCIBIOS_BAD_VENDOR_ID 0x83
293 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
294 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
295 #define PCIBIOS_SET_FAILED 0x88
296 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
298 /* Low-level architecture-dependent routines */
301 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
302 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
306 * ACPI needs to be able to access PCI config space before we've done a
307 * PCI bus scan and created pci_bus structures.
309 extern int raw_pci_read(unsigned int domain, unsigned int bus,
310 unsigned int devfn, int reg, int len, u32 *val);
311 extern int raw_pci_write(unsigned int domain, unsigned int bus,
312 unsigned int devfn, int reg, int len, u32 val);
314 struct pci_bus_region {
315 resource_size_t start;
320 spinlock_t lock; /* protects list, index */
321 struct list_head list; /* for IDs added at runtime */
322 unsigned int use_driver_data:1; /* pci_driver->driver_data is used */
325 /* ---------------------------------------------------------------- */
326 /** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
327 * a set of callbacks in struct pci_error_handlers, then that device driver
328 * will be notified of PCI bus errors, and will be driven to recovery
329 * when an error occurs.
332 typedef unsigned int __bitwise pci_ers_result_t;
334 enum pci_ers_result {
335 /* no result/none/not supported in device driver */
336 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
338 /* Device driver can recover without slot reset */
339 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
341 /* Device driver wants slot to be reset. */
342 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
344 /* Device has completely failed, is unrecoverable */
345 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
347 /* Device driver is fully recovered and operational */
348 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
351 /* PCI bus error event callbacks */
352 struct pci_error_handlers {
353 /* PCI bus error detected on this device */
354 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
355 enum pci_channel_state error);
357 /* MMIO has been re-enabled, but not DMA */
358 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
360 /* PCI Express link has been reset */
361 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
363 /* PCI slot has been reset */
364 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
366 /* Device driver may resume normal operations */
367 void (*resume)(struct pci_dev *dev);
370 /* ---------------------------------------------------------------- */
374 struct list_head node;
376 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
377 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
378 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
379 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
380 int (*suspend_late) (struct pci_dev *dev, pm_message_t state);
381 int (*resume_early) (struct pci_dev *dev);
382 int (*resume) (struct pci_dev *dev); /* Device woken up */
383 void (*shutdown) (struct pci_dev *dev);
385 struct pci_error_handlers *err_handler;
386 struct device_driver driver;
387 struct pci_dynids dynids;
390 #define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
393 * DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table
394 * @_table: device table name
396 * This macro is used to create a struct pci_device_id array (a device table)
397 * in a generic manner.
399 #define DEFINE_PCI_DEVICE_TABLE(_table) \
400 const struct pci_device_id _table[] __devinitconst
403 * PCI_DEVICE - macro used to describe a specific pci device
404 * @vend: the 16 bit PCI Vendor ID
405 * @dev: the 16 bit PCI Device ID
407 * This macro is used to create a struct pci_device_id that matches a
408 * specific device. The subvendor and subdevice fields will be set to
411 #define PCI_DEVICE(vend,dev) \
412 .vendor = (vend), .device = (dev), \
413 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
416 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
417 * @dev_class: the class, subclass, prog-if triple for this device
418 * @dev_class_mask: the class mask for this device
420 * This macro is used to create a struct pci_device_id that matches a
421 * specific PCI class. The vendor, device, subvendor, and subdevice
422 * fields will be set to PCI_ANY_ID.
424 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
425 .class = (dev_class), .class_mask = (dev_class_mask), \
426 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
427 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
430 * PCI_VDEVICE - macro used to describe a specific pci device in short form
431 * @vend: the vendor name
432 * @dev: the 16 bit PCI Device ID
434 * This macro is used to create a struct pci_device_id that matches a
435 * specific PCI device. The subvendor, and subdevice fields will be set
436 * to PCI_ANY_ID. The macro allows the next field to follow as the device
440 #define PCI_VDEVICE(vendor, device) \
441 PCI_VENDOR_ID_##vendor, (device), \
442 PCI_ANY_ID, PCI_ANY_ID, 0, 0
444 /* these external functions are only available when PCI support is enabled */
447 extern struct bus_type pci_bus_type;
449 /* Do NOT directly access these two variables, unless you are arch specific pci
450 * code, or pci core code. */
451 extern struct list_head pci_root_buses; /* list of all known PCI buses */
452 extern struct list_head pci_devices; /* list of all devices */
453 /* Some device drivers need know if pci is initiated */
454 extern int no_pci_devices(void);
456 void pcibios_fixup_bus(struct pci_bus *);
457 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
458 char *pcibios_setup(char *str);
460 /* Used only when drivers/pci/setup.c is used */
461 void pcibios_align_resource(void *, struct resource *, resource_size_t,
463 void pcibios_update_irq(struct pci_dev *, int irq);
465 /* Generic PCI functions used internally */
467 extern struct pci_bus *pci_find_bus(int domain, int busnr);
468 void pci_bus_add_devices(struct pci_bus *bus);
469 struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
470 struct pci_ops *ops, void *sysdata);
471 static inline struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops,
474 struct pci_bus *root_bus;
475 root_bus = pci_scan_bus_parented(NULL, bus, ops, sysdata);
477 pci_bus_add_devices(root_bus);
480 struct pci_bus *pci_create_bus(struct device *parent, int bus,
481 struct pci_ops *ops, void *sysdata);
482 struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
484 int pci_scan_slot(struct pci_bus *bus, int devfn);
485 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
486 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
487 unsigned int pci_scan_child_bus(struct pci_bus *bus);
488 int __must_check pci_bus_add_device(struct pci_dev *dev);
489 void pci_read_bridge_bases(struct pci_bus *child);
490 struct resource *pci_find_parent_resource(const struct pci_dev *dev,
491 struct resource *res);
492 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
493 extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
494 extern void pci_dev_put(struct pci_dev *dev);
495 extern void pci_remove_bus(struct pci_bus *b);
496 extern void pci_remove_bus_device(struct pci_dev *dev);
497 extern void pci_stop_bus_device(struct pci_dev *dev);
498 void pci_setup_cardbus(struct pci_bus *bus);
499 extern void pci_sort_breadthfirst(void);
501 /* Generic PCI functions exported to card drivers */
503 #ifdef CONFIG_PCI_LEGACY
504 struct pci_dev __deprecated *pci_find_device(unsigned int vendor,
506 const struct pci_dev *from);
507 struct pci_dev __deprecated *pci_find_slot(unsigned int bus,
509 #endif /* CONFIG_PCI_LEGACY */
511 int pci_find_capability(struct pci_dev *dev, int cap);
512 int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
513 int pci_find_ext_capability(struct pci_dev *dev, int cap);
514 int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
515 int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
516 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
518 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
519 struct pci_dev *from);
520 struct pci_dev *pci_get_device_reverse(unsigned int vendor, unsigned int device,
521 struct pci_dev *from);
523 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
524 unsigned int ss_vendor, unsigned int ss_device,
525 struct pci_dev *from);
526 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
527 struct pci_dev *pci_get_bus_and_slot(unsigned int bus, unsigned int devfn);
528 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
529 int pci_dev_present(const struct pci_device_id *ids);
530 const struct pci_device_id *pci_find_present(const struct pci_device_id *ids);
532 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
534 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
535 int where, u16 *val);
536 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
537 int where, u32 *val);
538 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
540 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
542 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
545 static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val)
547 return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
549 static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val)
551 return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
553 static inline int pci_read_config_dword(struct pci_dev *dev, int where,
556 return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
558 static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val)
560 return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
562 static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val)
564 return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
566 static inline int pci_write_config_dword(struct pci_dev *dev, int where,
569 return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
572 int __must_check pci_enable_device(struct pci_dev *dev);
573 int __must_check pci_enable_device_io(struct pci_dev *dev);
574 int __must_check pci_enable_device_mem(struct pci_dev *dev);
575 int __must_check pci_reenable_device(struct pci_dev *);
576 int __must_check pcim_enable_device(struct pci_dev *pdev);
577 void pcim_pin_device(struct pci_dev *pdev);
579 static inline int pci_is_managed(struct pci_dev *pdev)
581 return pdev->is_managed;
584 void pci_disable_device(struct pci_dev *dev);
585 void pci_set_master(struct pci_dev *dev);
586 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
587 #define HAVE_PCI_SET_MWI
588 int __must_check pci_set_mwi(struct pci_dev *dev);
589 int pci_try_set_mwi(struct pci_dev *dev);
590 void pci_clear_mwi(struct pci_dev *dev);
591 void pci_intx(struct pci_dev *dev, int enable);
592 void pci_msi_off(struct pci_dev *dev);
593 int pci_set_dma_mask(struct pci_dev *dev, u64 mask);
594 int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask);
595 int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size);
596 int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask);
597 int pcix_get_max_mmrbc(struct pci_dev *dev);
598 int pcix_get_mmrbc(struct pci_dev *dev);
599 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
600 int pcie_get_readrq(struct pci_dev *dev);
601 int pcie_set_readrq(struct pci_dev *dev, int rq);
602 void pci_update_resource(struct pci_dev *dev, struct resource *res, int resno);
603 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
604 int __must_check pci_assign_resource_fixed(struct pci_dev *dev, int i);
605 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
607 /* ROM control related routines */
608 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
609 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
610 size_t pci_get_rom_size(void __iomem *rom, size_t size);
612 /* Power management related routines */
613 int pci_save_state(struct pci_dev *dev);
614 int pci_restore_state(struct pci_dev *dev);
615 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
616 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
617 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable);
619 /* Functions for PCI Hotplug drivers to use */
620 int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
622 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
623 void pci_bus_assign_resources(struct pci_bus *bus);
624 void pci_bus_size_bridges(struct pci_bus *bus);
625 int pci_claim_resource(struct pci_dev *, int);
626 void pci_assign_unassigned_resources(void);
627 void pdev_enable_device(struct pci_dev *);
628 void pdev_sort_resources(struct pci_dev *, struct resource_list *);
629 void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
630 int (*)(struct pci_dev *, u8, u8));
631 #define HAVE_PCI_REQ_REGIONS 2
632 int __must_check pci_request_regions(struct pci_dev *, const char *);
633 void pci_release_regions(struct pci_dev *);
634 int __must_check pci_request_region(struct pci_dev *, int, const char *);
635 void pci_release_region(struct pci_dev *, int);
636 int pci_request_selected_regions(struct pci_dev *, int, const char *);
637 void pci_release_selected_regions(struct pci_dev *, int);
639 /* drivers/pci/bus.c */
640 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
641 struct resource *res, resource_size_t size,
642 resource_size_t align, resource_size_t min,
643 unsigned int type_mask,
644 void (*alignf)(void *, struct resource *,
645 resource_size_t, resource_size_t),
647 void pci_enable_bridges(struct pci_bus *bus);
649 /* Proper probing supporting hot-pluggable devices */
650 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
651 const char *mod_name);
652 static inline int __must_check pci_register_driver(struct pci_driver *driver)
654 return __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME);
657 void pci_unregister_driver(struct pci_driver *dev);
658 void pci_remove_behind_bridge(struct pci_dev *dev);
659 struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
660 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
661 struct pci_dev *dev);
662 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
665 void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *),
667 int pci_cfg_space_size(struct pci_dev *dev);
668 unsigned char pci_bus_max_busnr(struct pci_bus *bus);
670 /* kmem_cache style wrapper around pci_alloc_consistent() */
672 #include <linux/dmapool.h>
674 #define pci_pool dma_pool
675 #define pci_pool_create(name, pdev, size, align, allocation) \
676 dma_pool_create(name, &pdev->dev, size, align, allocation)
677 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
678 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
679 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
681 enum pci_dma_burst_strategy {
682 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
683 strategy_parameter is N/A */
684 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
686 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
687 strategy_parameter byte boundaries */
691 u16 vector; /* kernel uses to write allocated vector */
692 u16 entry; /* driver uses to specify entry, OS writes */
696 #ifndef CONFIG_PCI_MSI
697 static inline int pci_enable_msi(struct pci_dev *dev)
702 static inline void pci_disable_msi(struct pci_dev *dev)
705 static inline int pci_enable_msix(struct pci_dev *dev,
706 struct msix_entry *entries, int nvec)
711 static inline void pci_disable_msix(struct pci_dev *dev)
714 static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev)
717 static inline void pci_restore_msi_state(struct pci_dev *dev)
720 extern int pci_enable_msi(struct pci_dev *dev);
721 extern void pci_disable_msi(struct pci_dev *dev);
722 extern int pci_enable_msix(struct pci_dev *dev,
723 struct msix_entry *entries, int nvec);
724 extern void pci_disable_msix(struct pci_dev *dev);
725 extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
726 extern void pci_restore_msi_state(struct pci_dev *dev);
730 /* The functions a driver should call */
731 int ht_create_irq(struct pci_dev *dev, int idx);
732 void ht_destroy_irq(unsigned int irq);
733 #endif /* CONFIG_HT_IRQ */
735 extern void pci_block_user_cfg_access(struct pci_dev *dev);
736 extern void pci_unblock_user_cfg_access(struct pci_dev *dev);
739 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
740 * a PCI domain is defined to be a set of PCI busses which share
741 * configuration space.
743 #ifdef CONFIG_PCI_DOMAINS
744 extern int pci_domains_supported;
746 enum { pci_domains_supported = 0 };
747 static inline int pci_domain_nr(struct pci_bus *bus)
752 static inline int pci_proc_domain(struct pci_bus *bus)
756 #endif /* CONFIG_PCI_DOMAINS */
758 #else /* CONFIG_PCI is not enabled */
761 * If the system does not have PCI, clearly these return errors. Define
762 * these as simple inline functions to avoid hair in drivers.
765 #define _PCI_NOP(o, s, t) \
766 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
768 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
770 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
771 _PCI_NOP(o, word, u16 x) \
772 _PCI_NOP(o, dword, u32 x)
773 _PCI_NOP_ALL(read, *)
776 static inline struct pci_dev *pci_find_device(unsigned int vendor,
778 const struct pci_dev *from)
783 static inline struct pci_dev *pci_find_slot(unsigned int bus,
789 static inline struct pci_dev *pci_get_device(unsigned int vendor,
791 struct pci_dev *from)
796 static inline struct pci_dev *pci_get_device_reverse(unsigned int vendor,
798 struct pci_dev *from)
803 static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
805 unsigned int ss_vendor,
806 unsigned int ss_device,
807 struct pci_dev *from)
812 static inline struct pci_dev *pci_get_class(unsigned int class,
813 struct pci_dev *from)
818 #define pci_dev_present(ids) (0)
819 #define no_pci_devices() (1)
820 #define pci_find_present(ids) (NULL)
821 #define pci_dev_put(dev) do { } while (0)
823 static inline void pci_set_master(struct pci_dev *dev)
826 static inline int pci_enable_device(struct pci_dev *dev)
831 static inline void pci_disable_device(struct pci_dev *dev)
834 static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
839 static inline int pci_set_dma_max_seg_size(struct pci_dev *dev,
845 static inline int pci_set_dma_seg_boundary(struct pci_dev *dev,
851 static inline int pci_assign_resource(struct pci_dev *dev, int i)
856 static inline int __pci_register_driver(struct pci_driver *drv,
857 struct module *owner)
862 static inline int pci_register_driver(struct pci_driver *drv)
867 static inline void pci_unregister_driver(struct pci_driver *drv)
870 static inline int pci_find_capability(struct pci_dev *dev, int cap)
875 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
881 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
886 /* Power management related routines */
887 static inline int pci_save_state(struct pci_dev *dev)
892 static inline int pci_restore_state(struct pci_dev *dev)
897 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
902 static inline pci_power_t pci_choose_state(struct pci_dev *dev,
908 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
914 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
919 static inline void pci_release_regions(struct pci_dev *dev)
922 #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
924 static inline void pci_block_user_cfg_access(struct pci_dev *dev)
927 static inline void pci_unblock_user_cfg_access(struct pci_dev *dev)
930 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
933 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
937 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
941 #endif /* CONFIG_PCI */
943 /* Include architecture-dependent settings and functions */
947 /* these helpers provide future and backwards compatibility
948 * for accessing popular PCI BAR info */
949 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
950 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
951 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
952 #define pci_resource_len(dev,bar) \
953 ((pci_resource_start((dev), (bar)) == 0 && \
954 pci_resource_end((dev), (bar)) == \
955 pci_resource_start((dev), (bar))) ? 0 : \
957 (pci_resource_end((dev), (bar)) - \
958 pci_resource_start((dev), (bar)) + 1))
960 /* Similar to the helpers above, these manipulate per-pci_dev
961 * driver-specific data. They are really just a wrapper around
962 * the generic device structure functions of these calls.
964 static inline void *pci_get_drvdata(struct pci_dev *pdev)
966 return dev_get_drvdata(&pdev->dev);
969 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
971 dev_set_drvdata(&pdev->dev, data);
974 /* If you want to know what to call your pci_dev, ask this function.
975 * Again, it's a wrapper around the generic device.
977 static inline char *pci_name(struct pci_dev *pdev)
979 return pdev->dev.bus_id;
983 /* Some archs don't want to expose struct resource to userland as-is
986 #ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
987 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
988 const struct resource *rsrc, resource_size_t *start,
989 resource_size_t *end)
991 *start = rsrc->start;
994 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
998 * The world is not perfect and supplies us with broken PCI devices.
999 * For at least a part of these bugs we need a work-around, so both
1000 * generic (drivers/pci/quirks.c) and per-architecture code can define
1001 * fixup hooks to be called for particular buggy devices.
1005 u16 vendor, device; /* You can use PCI_ANY_ID here of course */
1006 void (*hook)(struct pci_dev *dev);
1009 enum pci_fixup_pass {
1010 pci_fixup_early, /* Before probing BARs */
1011 pci_fixup_header, /* After reading configuration header */
1012 pci_fixup_final, /* Final phase of device fixups */
1013 pci_fixup_enable, /* pci_enable_device() time */
1014 pci_fixup_resume, /* pci_enable_device() time */
1017 /* Anonymous variables would be nice... */
1018 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook) \
1019 static const struct pci_fixup __pci_fixup_##name __used \
1020 __attribute__((__section__(#section))) = { vendor, device, hook };
1021 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
1022 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1023 vendor##device##hook, vendor, device, hook)
1024 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
1025 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1026 vendor##device##hook, vendor, device, hook)
1027 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
1028 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1029 vendor##device##hook, vendor, device, hook)
1030 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
1031 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1032 vendor##device##hook, vendor, device, hook)
1033 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
1034 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1035 resume##vendor##device##hook, vendor, device, hook)
1038 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
1040 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
1041 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
1042 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
1043 int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name);
1044 int pcim_iomap_regions_request_all(struct pci_dev *pdev, u16 mask,
1046 void pcim_iounmap_regions(struct pci_dev *pdev, u16 mask);
1048 extern int pci_pci_problems;
1049 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
1050 #define PCIPCI_TRITON 2
1051 #define PCIPCI_NATOMA 4
1052 #define PCIPCI_VIAETBF 8
1053 #define PCIPCI_VSFX 16
1054 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
1055 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
1057 extern unsigned long pci_cardbus_io_size;
1058 extern unsigned long pci_cardbus_mem_size;
1060 extern int pcibios_add_platform_entries(struct pci_dev *dev);
1062 #endif /* __KERNEL__ */
1063 #endif /* LINUX_PCI_H */