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>
26 * The PCI interface treats multi-function devices as independent
27 * devices. The slot/function address of each device is encoded
28 * in a single byte as follows:
33 #define PCI_DEVFN(slot, func) ((((slot) & 0x1f) << 3) | ((func) & 0x07))
34 #define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f)
35 #define PCI_FUNC(devfn) ((devfn) & 0x07)
37 /* Ioctls for /proc/bus/pci/X/Y nodes. */
38 #define PCIIOC_BASE ('P' << 24 | 'C' << 16 | 'I' << 8)
39 #define PCIIOC_CONTROLLER (PCIIOC_BASE | 0x00) /* Get controller for PCI device. */
40 #define PCIIOC_MMAP_IS_IO (PCIIOC_BASE | 0x01) /* Set mmap state to I/O space. */
41 #define PCIIOC_MMAP_IS_MEM (PCIIOC_BASE | 0x02) /* Set mmap state to MEM space. */
42 #define PCIIOC_WRITE_COMBINE (PCIIOC_BASE | 0x03) /* Enable/disable write-combining. */
46 #include <linux/mod_devicetable.h>
48 #include <linux/types.h>
49 #include <linux/ioport.h>
50 #include <linux/list.h>
51 #include <linux/compiler.h>
52 #include <linux/errno.h>
53 #include <asm/atomic.h>
54 #include <linux/device.h>
56 /* Include the ID list */
57 #include <linux/pci_ids.h>
59 /* File state for mmap()s on /proc/bus/pci/X/Y */
65 /* This defines the direction arg to the DMA mapping routines. */
66 #define PCI_DMA_BIDIRECTIONAL 0
67 #define PCI_DMA_TODEVICE 1
68 #define PCI_DMA_FROMDEVICE 2
69 #define PCI_DMA_NONE 3
71 #define DEVICE_COUNT_RESOURCE 12
73 typedef int __bitwise pci_power_t;
75 #define PCI_D0 ((pci_power_t __force) 0)
76 #define PCI_D1 ((pci_power_t __force) 1)
77 #define PCI_D2 ((pci_power_t __force) 2)
78 #define PCI_D3hot ((pci_power_t __force) 3)
79 #define PCI_D3cold ((pci_power_t __force) 4)
80 #define PCI_UNKNOWN ((pci_power_t __force) 5)
81 #define PCI_POWER_ERROR ((pci_power_t __force) -1)
83 /** The pci_channel state describes connectivity between the CPU and
84 * the pci device. If some PCI bus between here and the pci device
85 * has crashed or locked up, this info is reflected here.
87 typedef unsigned int __bitwise pci_channel_state_t;
89 enum pci_channel_state {
90 /* I/O channel is in normal state */
91 pci_channel_io_normal = (__force pci_channel_state_t) 1,
93 /* I/O to channel is blocked */
94 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
96 /* PCI card is dead */
97 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
100 typedef unsigned int __bitwise pcie_reset_state_t;
102 enum pcie_reset_state {
103 /* Reset is NOT asserted (Use to deassert reset) */
104 pcie_deassert_reset = (__force pcie_reset_state_t) 1,
106 /* Use #PERST to reset PCI-E device */
107 pcie_warm_reset = (__force pcie_reset_state_t) 2,
109 /* Use PCI-E Hot Reset to reset device */
110 pcie_hot_reset = (__force pcie_reset_state_t) 3
113 typedef unsigned short __bitwise pci_dev_flags_t;
115 /* INTX_DISABLE in PCI_COMMAND register disables MSI
118 PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) 1,
121 typedef unsigned short __bitwise pci_bus_flags_t;
123 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
124 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
127 struct pci_cap_saved_state {
128 struct hlist_node next;
133 struct pcie_link_state;
135 * The pci_dev structure is used to describe PCI devices.
138 struct list_head bus_list; /* node in per-bus list */
139 struct pci_bus *bus; /* bus this device is on */
140 struct pci_bus *subordinate; /* bus this device bridges to */
142 void *sysdata; /* hook for sys-specific extension */
143 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
145 unsigned int devfn; /* encoded device & function index */
146 unsigned short vendor;
147 unsigned short device;
148 unsigned short subsystem_vendor;
149 unsigned short subsystem_device;
150 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
151 u8 revision; /* PCI revision, low byte of class word */
152 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
153 u8 pcie_type; /* PCI-E device/port type */
154 u8 rom_base_reg; /* which config register controls the ROM */
155 u8 pin; /* which interrupt pin this device uses */
157 struct pci_driver *driver; /* which driver has allocated this device */
158 u64 dma_mask; /* Mask of the bits of bus address this
159 device implements. Normally this is
160 0xffffffff. You only need to change
161 this if your device has broken DMA
162 or supports 64-bit transfers. */
164 struct device_dma_parameters dma_parms;
166 pci_power_t current_state; /* Current operating state. In ACPI-speak,
167 this is D0-D3, D0 being fully functional,
170 #ifdef CONFIG_PCIEASPM
171 struct pcie_link_state *link_state; /* ASPM link state. */
174 pci_channel_state_t error_state; /* current connectivity state */
175 struct device dev; /* Generic device interface */
177 int cfg_size; /* Size of configuration space */
180 * Instead of touching interrupt line and base address registers
181 * directly, use the values stored here. They might be different!
184 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
186 /* These fields are used by common fixups */
187 unsigned int transparent:1; /* Transparent PCI bridge */
188 unsigned int multifunction:1;/* Part of multi-function device */
189 /* keep track of device state */
190 unsigned int is_added:1;
191 unsigned int is_busmaster:1; /* device is busmaster */
192 unsigned int no_msi:1; /* device may not use msi */
193 unsigned int no_d1d2:1; /* only allow d0 or d3 */
194 unsigned int block_ucfg_access:1; /* userspace config space access is blocked */
195 unsigned int broken_parity_status:1; /* Device generates false positive parity */
196 unsigned int msi_enabled:1;
197 unsigned int msix_enabled:1;
198 unsigned int is_managed:1;
199 unsigned int is_pcie:1;
200 pci_dev_flags_t dev_flags;
201 atomic_t enable_cnt; /* pci_enable_device has been called */
203 u32 saved_config_space[16]; /* config space saved at suspend time */
204 struct hlist_head saved_cap_space;
205 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
206 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
207 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
208 #ifdef CONFIG_PCI_MSI
209 struct list_head msi_list;
214 extern struct pci_dev *alloc_pci_dev(void);
216 #define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
217 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
218 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
220 static inline int pci_channel_offline(struct pci_dev *pdev)
222 return (pdev->error_state != pci_channel_io_normal);
225 static inline struct pci_cap_saved_state *pci_find_saved_cap(
226 struct pci_dev *pci_dev, char cap)
228 struct pci_cap_saved_state *tmp;
229 struct hlist_node *pos;
231 hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) {
232 if (tmp->cap_nr == cap)
238 static inline void pci_add_saved_cap(struct pci_dev *pci_dev,
239 struct pci_cap_saved_state *new_cap)
241 hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space);
245 * For PCI devices, the region numbers are assigned this way:
247 * 0-5 standard PCI regions
249 * 7-10 bridges: address space assigned to buses behind the bridge
252 #define PCI_ROM_RESOURCE 6
253 #define PCI_BRIDGE_RESOURCES 7
254 #define PCI_NUM_RESOURCES 11
256 #ifndef PCI_BUS_NUM_RESOURCES
257 #define PCI_BUS_NUM_RESOURCES 8
260 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
263 struct list_head node; /* node in list of buses */
264 struct pci_bus *parent; /* parent bus this bridge is on */
265 struct list_head children; /* list of child buses */
266 struct list_head devices; /* list of devices on this bus */
267 struct pci_dev *self; /* bridge device as seen by parent */
268 struct resource *resource[PCI_BUS_NUM_RESOURCES];
269 /* address space routed to this bus */
271 struct pci_ops *ops; /* configuration access functions */
272 void *sysdata; /* hook for sys-specific extension */
273 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
275 unsigned char number; /* bus number */
276 unsigned char primary; /* number of primary bridge */
277 unsigned char secondary; /* number of secondary bridge */
278 unsigned char subordinate; /* max number of subordinate buses */
282 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
283 pci_bus_flags_t bus_flags; /* Inherited by child busses */
284 struct device *bridge;
286 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
287 struct bin_attribute *legacy_mem; /* legacy mem */
288 unsigned int is_added:1;
291 #define pci_bus_b(n) list_entry(n, struct pci_bus, node)
292 #define to_pci_bus(n) container_of(n, struct pci_bus, dev)
295 * Error values that may be returned by PCI functions.
297 #define PCIBIOS_SUCCESSFUL 0x00
298 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
299 #define PCIBIOS_BAD_VENDOR_ID 0x83
300 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
301 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
302 #define PCIBIOS_SET_FAILED 0x88
303 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
305 /* Low-level architecture-dependent routines */
308 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
309 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
313 * ACPI needs to be able to access PCI config space before we've done a
314 * PCI bus scan and created pci_bus structures.
316 extern int raw_pci_read(unsigned int domain, unsigned int bus,
317 unsigned int devfn, int reg, int len, u32 *val);
318 extern int raw_pci_write(unsigned int domain, unsigned int bus,
319 unsigned int devfn, int reg, int len, u32 val);
321 struct pci_bus_region {
322 resource_size_t start;
327 spinlock_t lock; /* protects list, index */
328 struct list_head list; /* for IDs added at runtime */
329 unsigned int use_driver_data:1; /* pci_driver->driver_data is used */
332 /* ---------------------------------------------------------------- */
333 /** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
334 * a set of callbacks in struct pci_error_handlers, then that device driver
335 * will be notified of PCI bus errors, and will be driven to recovery
336 * when an error occurs.
339 typedef unsigned int __bitwise pci_ers_result_t;
341 enum pci_ers_result {
342 /* no result/none/not supported in device driver */
343 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
345 /* Device driver can recover without slot reset */
346 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
348 /* Device driver wants slot to be reset. */
349 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
351 /* Device has completely failed, is unrecoverable */
352 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
354 /* Device driver is fully recovered and operational */
355 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
358 /* PCI bus error event callbacks */
359 struct pci_error_handlers {
360 /* PCI bus error detected on this device */
361 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
362 enum pci_channel_state error);
364 /* MMIO has been re-enabled, but not DMA */
365 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
367 /* PCI Express link has been reset */
368 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
370 /* PCI slot has been reset */
371 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
373 /* Device driver may resume normal operations */
374 void (*resume)(struct pci_dev *dev);
377 /* ---------------------------------------------------------------- */
381 struct list_head node;
383 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
384 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
385 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
386 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
387 int (*suspend_late) (struct pci_dev *dev, pm_message_t state);
388 int (*resume_early) (struct pci_dev *dev);
389 int (*resume) (struct pci_dev *dev); /* Device woken up */
390 void (*shutdown) (struct pci_dev *dev);
392 struct pci_error_handlers *err_handler;
393 struct device_driver driver;
394 struct pci_dynids dynids;
397 #define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
400 * DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table
401 * @_table: device table name
403 * This macro is used to create a struct pci_device_id array (a device table)
404 * in a generic manner.
406 #define DEFINE_PCI_DEVICE_TABLE(_table) \
407 const struct pci_device_id _table[] __devinitconst
410 * PCI_DEVICE - macro used to describe a specific pci device
411 * @vend: the 16 bit PCI Vendor ID
412 * @dev: the 16 bit PCI Device ID
414 * This macro is used to create a struct pci_device_id that matches a
415 * specific device. The subvendor and subdevice fields will be set to
418 #define PCI_DEVICE(vend,dev) \
419 .vendor = (vend), .device = (dev), \
420 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
423 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
424 * @dev_class: the class, subclass, prog-if triple for this device
425 * @dev_class_mask: the class mask for this device
427 * This macro is used to create a struct pci_device_id that matches a
428 * specific PCI class. The vendor, device, subvendor, and subdevice
429 * fields will be set to PCI_ANY_ID.
431 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
432 .class = (dev_class), .class_mask = (dev_class_mask), \
433 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
434 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
437 * PCI_VDEVICE - macro used to describe a specific pci device in short form
438 * @vend: the vendor name
439 * @dev: the 16 bit PCI Device ID
441 * This macro is used to create a struct pci_device_id that matches a
442 * specific PCI device. The subvendor, and subdevice fields will be set
443 * to PCI_ANY_ID. The macro allows the next field to follow as the device
447 #define PCI_VDEVICE(vendor, device) \
448 PCI_VENDOR_ID_##vendor, (device), \
449 PCI_ANY_ID, PCI_ANY_ID, 0, 0
451 /* these external functions are only available when PCI support is enabled */
454 extern struct bus_type pci_bus_type;
456 /* Do NOT directly access these two variables, unless you are arch specific pci
457 * code, or pci core code. */
458 extern struct list_head pci_root_buses; /* list of all known PCI buses */
459 /* Some device drivers need know if pci is initiated */
460 extern int no_pci_devices(void);
462 void pcibios_fixup_bus(struct pci_bus *);
463 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
464 char *pcibios_setup(char *str);
466 /* Used only when drivers/pci/setup.c is used */
467 void pcibios_align_resource(void *, struct resource *, resource_size_t,
469 void pcibios_update_irq(struct pci_dev *, int irq);
471 /* Generic PCI functions used internally */
473 extern struct pci_bus *pci_find_bus(int domain, int busnr);
474 void pci_bus_add_devices(struct pci_bus *bus);
475 struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
476 struct pci_ops *ops, void *sysdata);
477 static inline struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops,
480 struct pci_bus *root_bus;
481 root_bus = pci_scan_bus_parented(NULL, bus, ops, sysdata);
483 pci_bus_add_devices(root_bus);
486 struct pci_bus *pci_create_bus(struct device *parent, int bus,
487 struct pci_ops *ops, void *sysdata);
488 struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
490 int pci_scan_slot(struct pci_bus *bus, int devfn);
491 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
492 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
493 unsigned int pci_scan_child_bus(struct pci_bus *bus);
494 int __must_check pci_bus_add_device(struct pci_dev *dev);
495 void pci_read_bridge_bases(struct pci_bus *child);
496 struct resource *pci_find_parent_resource(const struct pci_dev *dev,
497 struct resource *res);
498 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
499 extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
500 extern void pci_dev_put(struct pci_dev *dev);
501 extern void pci_remove_bus(struct pci_bus *b);
502 extern void pci_remove_bus_device(struct pci_dev *dev);
503 extern void pci_stop_bus_device(struct pci_dev *dev);
504 void pci_setup_cardbus(struct pci_bus *bus);
505 extern void pci_sort_breadthfirst(void);
507 /* Generic PCI functions exported to card drivers */
509 #ifdef CONFIG_PCI_LEGACY
510 struct pci_dev __deprecated *pci_find_device(unsigned int vendor,
512 const struct pci_dev *from);
513 struct pci_dev __deprecated *pci_find_slot(unsigned int bus,
515 #endif /* CONFIG_PCI_LEGACY */
517 int pci_find_capability(struct pci_dev *dev, int cap);
518 int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
519 int pci_find_ext_capability(struct pci_dev *dev, int cap);
520 int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
521 int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
522 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
524 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
525 struct pci_dev *from);
526 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
527 unsigned int ss_vendor, unsigned int ss_device,
528 const struct pci_dev *from);
529 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
530 struct pci_dev *pci_get_bus_and_slot(unsigned int bus, unsigned int devfn);
531 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
532 int pci_dev_present(const struct pci_device_id *ids);
534 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
536 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
537 int where, u16 *val);
538 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
539 int where, u32 *val);
540 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
542 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
544 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
547 static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val)
549 return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
551 static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val)
553 return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
555 static inline int pci_read_config_dword(struct pci_dev *dev, int where,
558 return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
560 static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val)
562 return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
564 static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val)
566 return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
568 static inline int pci_write_config_dword(struct pci_dev *dev, int where,
571 return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
574 int __must_check pci_enable_device(struct pci_dev *dev);
575 int __must_check pci_enable_device_io(struct pci_dev *dev);
576 int __must_check pci_enable_device_mem(struct pci_dev *dev);
577 int __must_check pci_reenable_device(struct pci_dev *);
578 int __must_check pcim_enable_device(struct pci_dev *pdev);
579 void pcim_pin_device(struct pci_dev *pdev);
581 static inline int pci_is_managed(struct pci_dev *pdev)
583 return pdev->is_managed;
586 void pci_disable_device(struct pci_dev *dev);
587 void pci_set_master(struct pci_dev *dev);
588 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
589 #define HAVE_PCI_SET_MWI
590 int __must_check pci_set_mwi(struct pci_dev *dev);
591 int pci_try_set_mwi(struct pci_dev *dev);
592 void pci_clear_mwi(struct pci_dev *dev);
593 void pci_intx(struct pci_dev *dev, int enable);
594 void pci_msi_off(struct pci_dev *dev);
595 int pci_set_dma_mask(struct pci_dev *dev, u64 mask);
596 int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask);
597 int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size);
598 int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask);
599 int pcix_get_max_mmrbc(struct pci_dev *dev);
600 int pcix_get_mmrbc(struct pci_dev *dev);
601 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
602 int pcie_get_readrq(struct pci_dev *dev);
603 int pcie_set_readrq(struct pci_dev *dev, int rq);
604 void pci_update_resource(struct pci_dev *dev, struct resource *res, int resno);
605 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
606 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
608 /* ROM control related routines */
609 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
610 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
611 size_t pci_get_rom_size(void __iomem *rom, size_t size);
613 /* Power management related routines */
614 int pci_save_state(struct pci_dev *dev);
615 int pci_restore_state(struct pci_dev *dev);
616 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
617 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
618 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable);
620 /* Functions for PCI Hotplug drivers to use */
621 int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
623 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
624 void pci_bus_assign_resources(struct pci_bus *bus);
625 void pci_bus_size_bridges(struct pci_bus *bus);
626 int pci_claim_resource(struct pci_dev *, int);
627 void pci_assign_unassigned_resources(void);
628 void pdev_enable_device(struct pci_dev *);
629 void pdev_sort_resources(struct pci_dev *, struct resource_list *);
630 int pci_enable_resources(struct pci_dev *, int mask);
631 void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
632 int (*)(struct pci_dev *, u8, u8));
633 #define HAVE_PCI_REQ_REGIONS 2
634 int __must_check pci_request_regions(struct pci_dev *, const char *);
635 void pci_release_regions(struct pci_dev *);
636 int __must_check pci_request_region(struct pci_dev *, int, const char *);
637 void pci_release_region(struct pci_dev *, int);
638 int pci_request_selected_regions(struct pci_dev *, int, const char *);
639 void pci_release_selected_regions(struct pci_dev *, int);
641 /* drivers/pci/bus.c */
642 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
643 struct resource *res, resource_size_t size,
644 resource_size_t align, resource_size_t min,
645 unsigned int type_mask,
646 void (*alignf)(void *, struct resource *,
647 resource_size_t, resource_size_t),
649 void pci_enable_bridges(struct pci_bus *bus);
651 /* Proper probing supporting hot-pluggable devices */
652 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
653 const char *mod_name);
654 static inline int __must_check pci_register_driver(struct pci_driver *driver)
656 return __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME);
659 void pci_unregister_driver(struct pci_driver *dev);
660 void pci_remove_behind_bridge(struct pci_dev *dev);
661 struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
662 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
663 struct pci_dev *dev);
664 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
667 void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *),
669 int pci_cfg_space_size(struct pci_dev *dev);
670 unsigned char pci_bus_max_busnr(struct pci_bus *bus);
672 /* kmem_cache style wrapper around pci_alloc_consistent() */
674 #include <linux/dmapool.h>
676 #define pci_pool dma_pool
677 #define pci_pool_create(name, pdev, size, align, allocation) \
678 dma_pool_create(name, &pdev->dev, size, align, allocation)
679 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
680 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
681 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
683 enum pci_dma_burst_strategy {
684 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
685 strategy_parameter is N/A */
686 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
688 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
689 strategy_parameter byte boundaries */
693 u16 vector; /* kernel uses to write allocated vector */
694 u16 entry; /* driver uses to specify entry, OS writes */
698 #ifndef CONFIG_PCI_MSI
699 static inline int pci_enable_msi(struct pci_dev *dev)
704 static inline void pci_disable_msi(struct pci_dev *dev)
707 static inline int pci_enable_msix(struct pci_dev *dev,
708 struct msix_entry *entries, int nvec)
713 static inline void pci_disable_msix(struct pci_dev *dev)
716 static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev)
719 static inline void pci_restore_msi_state(struct pci_dev *dev)
722 extern int pci_enable_msi(struct pci_dev *dev);
723 extern void pci_disable_msi(struct pci_dev *dev);
724 extern int pci_enable_msix(struct pci_dev *dev,
725 struct msix_entry *entries, int nvec);
726 extern void pci_disable_msix(struct pci_dev *dev);
727 extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
728 extern void pci_restore_msi_state(struct pci_dev *dev);
732 /* The functions a driver should call */
733 int ht_create_irq(struct pci_dev *dev, int idx);
734 void ht_destroy_irq(unsigned int irq);
735 #endif /* CONFIG_HT_IRQ */
737 extern void pci_block_user_cfg_access(struct pci_dev *dev);
738 extern void pci_unblock_user_cfg_access(struct pci_dev *dev);
741 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
742 * a PCI domain is defined to be a set of PCI busses which share
743 * configuration space.
745 #ifdef CONFIG_PCI_DOMAINS
746 extern int pci_domains_supported;
748 enum { pci_domains_supported = 0 };
749 static inline int pci_domain_nr(struct pci_bus *bus)
754 static inline int pci_proc_domain(struct pci_bus *bus)
758 #endif /* CONFIG_PCI_DOMAINS */
760 #else /* CONFIG_PCI is not enabled */
763 * If the system does not have PCI, clearly these return errors. Define
764 * these as simple inline functions to avoid hair in drivers.
767 #define _PCI_NOP(o, s, t) \
768 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
770 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
772 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
773 _PCI_NOP(o, word, u16 x) \
774 _PCI_NOP(o, dword, u32 x)
775 _PCI_NOP_ALL(read, *)
778 static inline struct pci_dev *pci_find_device(unsigned int vendor,
780 const struct pci_dev *from)
785 static inline struct pci_dev *pci_find_slot(unsigned int bus,
791 static inline struct pci_dev *pci_get_device(unsigned int vendor,
793 struct pci_dev *from)
798 static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
800 unsigned int ss_vendor,
801 unsigned int ss_device,
802 const struct pci_dev *from)
807 static inline struct pci_dev *pci_get_class(unsigned int class,
808 struct pci_dev *from)
813 #define pci_dev_present(ids) (0)
814 #define no_pci_devices() (1)
815 #define pci_dev_put(dev) do { } while (0)
817 static inline void pci_set_master(struct pci_dev *dev)
820 static inline int pci_enable_device(struct pci_dev *dev)
825 static inline void pci_disable_device(struct pci_dev *dev)
828 static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
833 static inline int pci_set_dma_max_seg_size(struct pci_dev *dev,
839 static inline int pci_set_dma_seg_boundary(struct pci_dev *dev,
845 static inline int pci_assign_resource(struct pci_dev *dev, int i)
850 static inline int __pci_register_driver(struct pci_driver *drv,
851 struct module *owner)
856 static inline int pci_register_driver(struct pci_driver *drv)
861 static inline void pci_unregister_driver(struct pci_driver *drv)
864 static inline int pci_find_capability(struct pci_dev *dev, int cap)
869 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
875 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
880 /* Power management related routines */
881 static inline int pci_save_state(struct pci_dev *dev)
886 static inline int pci_restore_state(struct pci_dev *dev)
891 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
896 static inline pci_power_t pci_choose_state(struct pci_dev *dev,
902 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
908 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
913 static inline void pci_release_regions(struct pci_dev *dev)
916 #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
918 static inline void pci_block_user_cfg_access(struct pci_dev *dev)
921 static inline void pci_unblock_user_cfg_access(struct pci_dev *dev)
924 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
927 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
931 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
935 #endif /* CONFIG_PCI */
937 /* Include architecture-dependent settings and functions */
941 /* these helpers provide future and backwards compatibility
942 * for accessing popular PCI BAR info */
943 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
944 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
945 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
946 #define pci_resource_len(dev,bar) \
947 ((pci_resource_start((dev), (bar)) == 0 && \
948 pci_resource_end((dev), (bar)) == \
949 pci_resource_start((dev), (bar))) ? 0 : \
951 (pci_resource_end((dev), (bar)) - \
952 pci_resource_start((dev), (bar)) + 1))
954 /* Similar to the helpers above, these manipulate per-pci_dev
955 * driver-specific data. They are really just a wrapper around
956 * the generic device structure functions of these calls.
958 static inline void *pci_get_drvdata(struct pci_dev *pdev)
960 return dev_get_drvdata(&pdev->dev);
963 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
965 dev_set_drvdata(&pdev->dev, data);
968 /* If you want to know what to call your pci_dev, ask this function.
969 * Again, it's a wrapper around the generic device.
971 static inline char *pci_name(struct pci_dev *pdev)
973 return pdev->dev.bus_id;
977 /* Some archs don't want to expose struct resource to userland as-is
980 #ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
981 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
982 const struct resource *rsrc, resource_size_t *start,
983 resource_size_t *end)
985 *start = rsrc->start;
988 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
992 * The world is not perfect and supplies us with broken PCI devices.
993 * For at least a part of these bugs we need a work-around, so both
994 * generic (drivers/pci/quirks.c) and per-architecture code can define
995 * fixup hooks to be called for particular buggy devices.
999 u16 vendor, device; /* You can use PCI_ANY_ID here of course */
1000 void (*hook)(struct pci_dev *dev);
1003 enum pci_fixup_pass {
1004 pci_fixup_early, /* Before probing BARs */
1005 pci_fixup_header, /* After reading configuration header */
1006 pci_fixup_final, /* Final phase of device fixups */
1007 pci_fixup_enable, /* pci_enable_device() time */
1008 pci_fixup_resume, /* pci_enable_device() time */
1011 /* Anonymous variables would be nice... */
1012 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook) \
1013 static const struct pci_fixup __pci_fixup_##name __used \
1014 __attribute__((__section__(#section))) = { vendor, device, hook };
1015 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
1016 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1017 vendor##device##hook, vendor, device, hook)
1018 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
1019 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1020 vendor##device##hook, vendor, device, hook)
1021 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
1022 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1023 vendor##device##hook, vendor, device, hook)
1024 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
1025 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1026 vendor##device##hook, vendor, device, hook)
1027 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
1028 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1029 resume##vendor##device##hook, vendor, device, hook)
1032 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
1034 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
1035 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
1036 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
1037 int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name);
1038 int pcim_iomap_regions_request_all(struct pci_dev *pdev, u16 mask,
1040 void pcim_iounmap_regions(struct pci_dev *pdev, u16 mask);
1042 extern int pci_pci_problems;
1043 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
1044 #define PCIPCI_TRITON 2
1045 #define PCIPCI_NATOMA 4
1046 #define PCIPCI_VIAETBF 8
1047 #define PCIPCI_VSFX 16
1048 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
1049 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
1051 extern unsigned long pci_cardbus_io_size;
1052 extern unsigned long pci_cardbus_mem_size;
1054 extern int pcibios_add_platform_entries(struct pci_dev *dev);
1056 #ifdef CONFIG_PCI_MMCONFIG
1057 extern void __init pci_mmcfg_early_init(int type);
1058 extern void __init pci_mmcfg_late_init(void);
1060 static inline void pci_mmcfg_early_init(int type) { }
1061 static inline void pci_mmcfg_late_init(void) { }
1064 #endif /* __KERNEL__ */
1065 #endif /* LINUX_PCI_H */