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 int __bitwise pcie_reset_state_t;
101 enum pcie_reset_state {
102 /* Reset is NOT asserted (Use to deassert reset) */
103 pcie_deassert_reset = (__force pcie_reset_state_t) 1,
105 /* Use #PERST to reset PCI-E device */
106 pcie_warm_reset = (__force pcie_reset_state_t) 2,
108 /* Use PCI-E Hot Reset to reset device */
109 pcie_hot_reset = (__force pcie_reset_state_t) 3
112 typedef unsigned short __bitwise pci_bus_flags_t;
114 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
115 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
118 struct pci_cap_saved_state {
119 struct hlist_node next;
125 * The pci_dev structure is used to describe PCI devices.
128 struct list_head global_list; /* node in list of all PCI devices */
129 struct list_head bus_list; /* node in per-bus list */
130 struct pci_bus *bus; /* bus this device is on */
131 struct pci_bus *subordinate; /* bus this device bridges to */
133 void *sysdata; /* hook for sys-specific extension */
134 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
136 unsigned int devfn; /* encoded device & function index */
137 unsigned short vendor;
138 unsigned short device;
139 unsigned short subsystem_vendor;
140 unsigned short subsystem_device;
141 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
142 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
143 u8 rom_base_reg; /* which config register controls the ROM */
144 u8 pin; /* which interrupt pin this device uses */
146 struct pci_driver *driver; /* which driver has allocated this device */
147 u64 dma_mask; /* Mask of the bits of bus address this
148 device implements. Normally this is
149 0xffffffff. You only need to change
150 this if your device has broken DMA
151 or supports 64-bit transfers. */
153 pci_power_t current_state; /* Current operating state. In ACPI-speak,
154 this is D0-D3, D0 being fully functional,
157 pci_channel_state_t error_state; /* current connectivity state */
158 struct device dev; /* Generic device interface */
160 /* device is compatible with these IDs */
161 unsigned short vendor_compatible[DEVICE_COUNT_COMPATIBLE];
162 unsigned short device_compatible[DEVICE_COUNT_COMPATIBLE];
164 int cfg_size; /* Size of configuration space */
167 * Instead of touching interrupt line and base address registers
168 * directly, use the values stored here. They might be different!
171 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
173 /* These fields are used by common fixups */
174 unsigned int transparent:1; /* Transparent PCI bridge */
175 unsigned int multifunction:1;/* Part of multi-function device */
176 /* keep track of device state */
177 unsigned int is_busmaster:1; /* device is busmaster */
178 unsigned int no_msi:1; /* device may not use msi */
179 unsigned int no_d1d2:1; /* only allow d0 or d3 */
180 unsigned int block_ucfg_access:1; /* userspace config space access is blocked */
181 unsigned int broken_parity_status:1; /* Device generates false positive parity */
182 unsigned int msi_enabled:1;
183 unsigned int msix_enabled:1;
184 unsigned int is_managed:1;
185 atomic_t enable_cnt; /* pci_enable_device has been called */
187 u32 saved_config_space[16]; /* config space saved at suspend time */
188 struct hlist_head saved_cap_space;
189 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
190 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
191 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
192 #ifdef CONFIG_PCI_MSI
193 struct list_head msi_list;
197 extern struct pci_dev *alloc_pci_dev(void);
199 #define pci_dev_g(n) list_entry(n, struct pci_dev, global_list)
200 #define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
201 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
202 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
204 static inline int pci_channel_offline(struct pci_dev *pdev)
206 return (pdev->error_state != pci_channel_io_normal);
209 static inline struct pci_cap_saved_state *pci_find_saved_cap(
210 struct pci_dev *pci_dev,char cap)
212 struct pci_cap_saved_state *tmp;
213 struct hlist_node *pos;
215 hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) {
216 if (tmp->cap_nr == cap)
222 static inline void pci_add_saved_cap(struct pci_dev *pci_dev,
223 struct pci_cap_saved_state *new_cap)
225 hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space);
229 * For PCI devices, the region numbers are assigned this way:
231 * 0-5 standard PCI regions
233 * 7-10 bridges: address space assigned to buses behind the bridge
236 #define PCI_ROM_RESOURCE 6
237 #define PCI_BRIDGE_RESOURCES 7
238 #define PCI_NUM_RESOURCES 11
240 #ifndef PCI_BUS_NUM_RESOURCES
241 #define PCI_BUS_NUM_RESOURCES 8
244 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
247 struct list_head node; /* node in list of buses */
248 struct pci_bus *parent; /* parent bus this bridge is on */
249 struct list_head children; /* list of child buses */
250 struct list_head devices; /* list of devices on this bus */
251 struct pci_dev *self; /* bridge device as seen by parent */
252 struct resource *resource[PCI_BUS_NUM_RESOURCES];
253 /* address space routed to this bus */
255 struct pci_ops *ops; /* configuration access functions */
256 void *sysdata; /* hook for sys-specific extension */
257 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
259 unsigned char number; /* bus number */
260 unsigned char primary; /* number of primary bridge */
261 unsigned char secondary; /* number of secondary bridge */
262 unsigned char subordinate; /* max number of subordinate buses */
266 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
267 pci_bus_flags_t bus_flags; /* Inherited by child busses */
268 struct device *bridge;
269 struct class_device class_dev;
270 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
271 struct bin_attribute *legacy_mem; /* legacy mem */
274 #define pci_bus_b(n) list_entry(n, struct pci_bus, node)
275 #define to_pci_bus(n) container_of(n, struct pci_bus, class_dev)
278 * Error values that may be returned by PCI functions.
280 #define PCIBIOS_SUCCESSFUL 0x00
281 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
282 #define PCIBIOS_BAD_VENDOR_ID 0x83
283 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
284 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
285 #define PCIBIOS_SET_FAILED 0x88
286 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
288 /* Low-level architecture-dependent routines */
291 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
292 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
296 int (*read)(unsigned int domain, unsigned int bus, unsigned int devfn,
297 int reg, int len, u32 *val);
298 int (*write)(unsigned int domain, unsigned int bus, unsigned int devfn,
299 int reg, int len, u32 val);
302 extern struct pci_raw_ops *raw_pci_ops;
304 struct pci_bus_region {
310 spinlock_t lock; /* protects list, index */
311 struct list_head list; /* for IDs added at runtime */
312 unsigned int use_driver_data:1; /* pci_driver->driver_data is used */
315 /* ---------------------------------------------------------------- */
316 /** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
317 * a set fof callbacks in struct pci_error_handlers, then that device driver
318 * will be notified of PCI bus errors, and will be driven to recovery
319 * when an error occurs.
322 typedef unsigned int __bitwise pci_ers_result_t;
324 enum pci_ers_result {
325 /* no result/none/not supported in device driver */
326 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
328 /* Device driver can recover without slot reset */
329 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
331 /* Device driver wants slot to be reset. */
332 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
334 /* Device has completely failed, is unrecoverable */
335 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
337 /* Device driver is fully recovered and operational */
338 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
341 /* PCI bus error event callbacks */
342 struct pci_error_handlers
344 /* PCI bus error detected on this device */
345 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
346 enum pci_channel_state error);
348 /* MMIO has been re-enabled, but not DMA */
349 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
351 /* PCI Express link has been reset */
352 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
354 /* PCI slot has been reset */
355 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
357 /* Device driver may resume normal operations */
358 void (*resume)(struct pci_dev *dev);
361 /* ---------------------------------------------------------------- */
365 struct list_head node;
367 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
368 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
369 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
370 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
371 int (*suspend_late) (struct pci_dev *dev, pm_message_t state);
372 int (*resume_early) (struct pci_dev *dev);
373 int (*resume) (struct pci_dev *dev); /* Device woken up */
374 void (*shutdown) (struct pci_dev *dev);
376 struct pci_error_handlers *err_handler;
377 struct device_driver driver;
378 struct pci_dynids dynids;
381 #define to_pci_driver(drv) container_of(drv,struct pci_driver, driver)
384 * PCI_DEVICE - macro used to describe a specific pci device
385 * @vend: the 16 bit PCI Vendor ID
386 * @dev: the 16 bit PCI Device ID
388 * This macro is used to create a struct pci_device_id that matches a
389 * specific device. The subvendor and subdevice fields will be set to
392 #define PCI_DEVICE(vend,dev) \
393 .vendor = (vend), .device = (dev), \
394 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
397 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
398 * @dev_class: the class, subclass, prog-if triple for this device
399 * @dev_class_mask: the class mask for this device
401 * This macro is used to create a struct pci_device_id that matches a
402 * specific PCI class. The vendor, device, subvendor, and subdevice
403 * fields will be set to PCI_ANY_ID.
405 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
406 .class = (dev_class), .class_mask = (dev_class_mask), \
407 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
408 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
411 * PCI_VDEVICE - macro used to describe a specific pci device in short form
412 * @vend: the vendor name
413 * @dev: the 16 bit PCI Device ID
415 * This macro is used to create a struct pci_device_id that matches a
416 * specific PCI device. The subvendor, and subdevice fields will be set
417 * to PCI_ANY_ID. The macro allows the next field to follow as the device
421 #define PCI_VDEVICE(vendor, device) \
422 PCI_VENDOR_ID_##vendor, (device), \
423 PCI_ANY_ID, PCI_ANY_ID, 0, 0
425 /* these external functions are only available when PCI support is enabled */
428 extern struct bus_type pci_bus_type;
430 /* Do NOT directly access these two variables, unless you are arch specific pci
431 * code, or pci core code. */
432 extern struct list_head pci_root_buses; /* list of all known PCI buses */
433 extern struct list_head pci_devices; /* list of all devices */
435 void pcibios_fixup_bus(struct pci_bus *);
436 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
437 char *pcibios_setup (char *str);
439 /* Used only when drivers/pci/setup.c is used */
440 void pcibios_align_resource(void *, struct resource *, resource_size_t,
442 void pcibios_update_irq(struct pci_dev *, int irq);
444 /* Generic PCI functions used internally */
446 extern struct pci_bus *pci_find_bus(int domain, int busnr);
447 void pci_bus_add_devices(struct pci_bus *bus);
448 struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus, struct pci_ops *ops, void *sysdata);
449 static inline struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata)
451 struct pci_bus *root_bus;
452 root_bus = pci_scan_bus_parented(NULL, bus, ops, sysdata);
454 pci_bus_add_devices(root_bus);
457 struct pci_bus *pci_create_bus(struct device *parent, int bus, struct pci_ops *ops, void *sysdata);
458 struct pci_bus * pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, int busnr);
459 int pci_scan_slot(struct pci_bus *bus, int devfn);
460 struct pci_dev * pci_scan_single_device(struct pci_bus *bus, int devfn);
461 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
462 unsigned int pci_scan_child_bus(struct pci_bus *bus);
463 int __must_check pci_bus_add_device(struct pci_dev *dev);
464 void pci_read_bridge_bases(struct pci_bus *child);
465 struct resource *pci_find_parent_resource(const struct pci_dev *dev, struct resource *res);
466 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
467 extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
468 extern void pci_dev_put(struct pci_dev *dev);
469 extern void pci_remove_bus(struct pci_bus *b);
470 extern void pci_remove_bus_device(struct pci_dev *dev);
471 extern void pci_stop_bus_device(struct pci_dev *dev);
472 void pci_setup_cardbus(struct pci_bus *bus);
473 extern void pci_sort_breadthfirst(void);
475 /* Generic PCI functions exported to card drivers */
477 struct pci_dev __deprecated *pci_find_device (unsigned int vendor, unsigned int device, const struct pci_dev *from);
478 struct pci_dev __deprecated *pci_find_slot (unsigned int bus, unsigned int devfn);
479 int pci_find_capability (struct pci_dev *dev, int cap);
480 int pci_find_next_capability (struct pci_dev *dev, u8 pos, int cap);
481 int pci_find_ext_capability (struct pci_dev *dev, int cap);
482 int pci_find_ht_capability (struct pci_dev *dev, int ht_cap);
483 int pci_find_next_ht_capability (struct pci_dev *dev, int pos, int ht_cap);
484 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
486 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
487 struct pci_dev *from);
488 struct pci_dev *pci_get_device_reverse(unsigned int vendor, unsigned int device,
489 struct pci_dev *from);
491 struct pci_dev *pci_get_subsys (unsigned int vendor, unsigned int device,
492 unsigned int ss_vendor, unsigned int ss_device,
493 struct pci_dev *from);
494 struct pci_dev *pci_get_slot (struct pci_bus *bus, unsigned int devfn);
495 struct pci_dev *pci_get_bus_and_slot (unsigned int bus, unsigned int devfn);
496 struct pci_dev *pci_get_class (unsigned int class, struct pci_dev *from);
497 int pci_dev_present(const struct pci_device_id *ids);
498 const struct pci_device_id *pci_find_present(const struct pci_device_id *ids);
500 int pci_bus_read_config_byte (struct pci_bus *bus, unsigned int devfn, int where, u8 *val);
501 int pci_bus_read_config_word (struct pci_bus *bus, unsigned int devfn, int where, u16 *val);
502 int pci_bus_read_config_dword (struct pci_bus *bus, unsigned int devfn, int where, u32 *val);
503 int pci_bus_write_config_byte (struct pci_bus *bus, unsigned int devfn, int where, u8 val);
504 int pci_bus_write_config_word (struct pci_bus *bus, unsigned int devfn, int where, u16 val);
505 int pci_bus_write_config_dword (struct pci_bus *bus, unsigned int devfn, int where, u32 val);
507 static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val)
509 return pci_bus_read_config_byte (dev->bus, dev->devfn, where, val);
511 static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val)
513 return pci_bus_read_config_word (dev->bus, dev->devfn, where, val);
515 static inline int pci_read_config_dword(struct pci_dev *dev, int where, u32 *val)
517 return pci_bus_read_config_dword (dev->bus, dev->devfn, where, val);
519 static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val)
521 return pci_bus_write_config_byte (dev->bus, dev->devfn, where, val);
523 static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val)
525 return pci_bus_write_config_word (dev->bus, dev->devfn, where, val);
527 static inline int pci_write_config_dword(struct pci_dev *dev, int where, u32 val)
529 return pci_bus_write_config_dword (dev->bus, dev->devfn, where, val);
532 int __must_check pci_enable_device(struct pci_dev *dev);
533 int __must_check pci_enable_device_bars(struct pci_dev *dev, int mask);
534 int __must_check pcim_enable_device(struct pci_dev *pdev);
535 void pcim_pin_device(struct pci_dev *pdev);
537 static inline int pci_is_managed(struct pci_dev *pdev)
539 return pdev->is_managed;
542 void pci_disable_device(struct pci_dev *dev);
543 void pci_set_master(struct pci_dev *dev);
544 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
545 #define HAVE_PCI_SET_MWI
546 int __must_check pci_set_mwi(struct pci_dev *dev);
547 void pci_clear_mwi(struct pci_dev *dev);
548 void pci_intx(struct pci_dev *dev, int enable);
549 void pci_msi_off(struct pci_dev *dev);
550 int pci_set_dma_mask(struct pci_dev *dev, u64 mask);
551 int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask);
552 int pcix_get_max_mmrbc(struct pci_dev *dev);
553 int pcix_get_mmrbc(struct pci_dev *dev);
554 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
555 int pcie_set_readrq(struct pci_dev *dev, int rq);
556 void pci_update_resource(struct pci_dev *dev, struct resource *res, int resno);
557 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
558 int __must_check pci_assign_resource_fixed(struct pci_dev *dev, int i);
559 void pci_restore_bars(struct pci_dev *dev);
560 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
562 /* ROM control related routines */
563 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
564 void __iomem __must_check *pci_map_rom_copy(struct pci_dev *pdev, size_t *size);
565 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
566 void pci_remove_rom(struct pci_dev *pdev);
568 /* Power management related routines */
569 int pci_save_state(struct pci_dev *dev);
570 int pci_restore_state(struct pci_dev *dev);
571 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
572 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
573 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable);
575 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
576 void pci_bus_assign_resources(struct pci_bus *bus);
577 void pci_bus_size_bridges(struct pci_bus *bus);
578 int pci_claim_resource(struct pci_dev *, int);
579 void pci_assign_unassigned_resources(void);
580 void pdev_enable_device(struct pci_dev *);
581 void pdev_sort_resources(struct pci_dev *, struct resource_list *);
582 void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
583 int (*)(struct pci_dev *, u8, u8));
584 #define HAVE_PCI_REQ_REGIONS 2
585 int __must_check pci_request_regions(struct pci_dev *, const char *);
586 void pci_release_regions(struct pci_dev *);
587 int __must_check pci_request_region(struct pci_dev *, int, const char *);
588 void pci_release_region(struct pci_dev *, int);
589 int pci_request_selected_regions(struct pci_dev *, int, const char *);
590 void pci_release_selected_regions(struct pci_dev *, int);
592 /* drivers/pci/bus.c */
593 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
594 struct resource *res, resource_size_t size,
595 resource_size_t align, resource_size_t min,
596 unsigned int type_mask,
597 void (*alignf)(void *, struct resource *,
598 resource_size_t, resource_size_t),
600 void pci_enable_bridges(struct pci_bus *bus);
602 /* Proper probing supporting hot-pluggable devices */
603 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
604 const char *mod_name);
605 static inline int __must_check pci_register_driver(struct pci_driver *driver)
607 return __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME);
610 void pci_unregister_driver(struct pci_driver *);
611 void pci_remove_behind_bridge(struct pci_dev *);
612 struct pci_driver *pci_dev_driver(const struct pci_dev *);
613 const struct pci_device_id *pci_match_device(struct pci_driver *drv, struct pci_dev *dev);
614 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, struct pci_dev *dev);
615 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max, int pass);
617 void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *),
619 int pci_cfg_space_size(struct pci_dev *dev);
620 unsigned char pci_bus_max_busnr(struct pci_bus* bus);
622 /* kmem_cache style wrapper around pci_alloc_consistent() */
624 #include <linux/dmapool.h>
626 #define pci_pool dma_pool
627 #define pci_pool_create(name, pdev, size, align, allocation) \
628 dma_pool_create(name, &pdev->dev, size, align, allocation)
629 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
630 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
631 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
633 enum pci_dma_burst_strategy {
634 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
635 strategy_parameter is N/A */
636 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
638 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
639 strategy_parameter byte boundaries */
643 u16 vector; /* kernel uses to write allocated vector */
644 u16 entry; /* driver uses to specify entry, OS writes */
648 #ifndef CONFIG_PCI_MSI
649 static inline int pci_enable_msi(struct pci_dev *dev) {return -1;}
650 static inline void pci_disable_msi(struct pci_dev *dev) {}
651 static inline int pci_enable_msix(struct pci_dev* dev,
652 struct msix_entry *entries, int nvec) {return -1;}
653 static inline void pci_disable_msix(struct pci_dev *dev) {}
654 static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev) {}
656 extern int pci_enable_msi(struct pci_dev *dev);
657 extern void pci_disable_msi(struct pci_dev *dev);
658 extern int pci_enable_msix(struct pci_dev* dev,
659 struct msix_entry *entries, int nvec);
660 extern void pci_disable_msix(struct pci_dev *dev);
661 extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
665 /* The functions a driver should call */
666 int ht_create_irq(struct pci_dev *dev, int idx);
667 void ht_destroy_irq(unsigned int irq);
668 #endif /* CONFIG_HT_IRQ */
670 extern void pci_block_user_cfg_access(struct pci_dev *dev);
671 extern void pci_unblock_user_cfg_access(struct pci_dev *dev);
674 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
675 * a PCI domain is defined to be a set of PCI busses which share
676 * configuration space.
678 #ifndef CONFIG_PCI_DOMAINS
679 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
680 static inline int pci_proc_domain(struct pci_bus *bus)
686 #else /* CONFIG_PCI is not enabled */
689 * If the system does not have PCI, clearly these return errors. Define
690 * these as simple inline functions to avoid hair in drivers.
693 #define _PCI_NOP(o,s,t) \
694 static inline int pci_##o##_config_##s (struct pci_dev *dev, int where, t val) \
695 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
696 #define _PCI_NOP_ALL(o,x) _PCI_NOP(o,byte,u8 x) \
697 _PCI_NOP(o,word,u16 x) \
698 _PCI_NOP(o,dword,u32 x)
699 _PCI_NOP_ALL(read, *)
702 static inline struct pci_dev *pci_find_device(unsigned int vendor, unsigned int device, const struct pci_dev *from)
705 static inline struct pci_dev *pci_find_slot(unsigned int bus, unsigned int devfn)
708 static inline struct pci_dev *pci_get_device(unsigned int vendor,
709 unsigned int device, struct pci_dev *from)
712 static inline struct pci_dev *pci_get_device_reverse(unsigned int vendor,
713 unsigned int device, struct pci_dev *from)
716 static inline struct pci_dev *pci_get_subsys (unsigned int vendor, unsigned int device,
717 unsigned int ss_vendor, unsigned int ss_device, struct pci_dev *from)
720 static inline struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from)
723 #define pci_dev_present(ids) (0)
724 #define pci_find_present(ids) (NULL)
725 #define pci_dev_put(dev) do { } while (0)
727 static inline void pci_set_master(struct pci_dev *dev) { }
728 static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
729 static inline void pci_disable_device(struct pci_dev *dev) { }
730 static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask) { return -EIO; }
731 static inline int pci_assign_resource(struct pci_dev *dev, int i) { return -EBUSY;}
732 static inline int __pci_register_driver(struct pci_driver *drv, struct module *owner) { return 0;}
733 static inline int pci_register_driver(struct pci_driver *drv) { return 0;}
734 static inline void pci_unregister_driver(struct pci_driver *drv) { }
735 static inline int pci_find_capability (struct pci_dev *dev, int cap) {return 0; }
736 static inline int pci_find_next_capability (struct pci_dev *dev, u8 post, int cap) { return 0; }
737 static inline int pci_find_ext_capability (struct pci_dev *dev, int cap) {return 0; }
738 static inline const struct pci_device_id *pci_match_device(const struct pci_device_id *ids, const struct pci_dev *dev) { return NULL; }
740 /* Power management related routines */
741 static inline int pci_save_state(struct pci_dev *dev) { return 0; }
742 static inline int pci_restore_state(struct pci_dev *dev) { return 0; }
743 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state) { return 0; }
744 static inline pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state) { return PCI_D0; }
745 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable) { return 0; }
747 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name) { return -EIO; }
748 static inline void pci_release_regions(struct pci_dev *dev) { }
750 #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
752 static inline void pci_block_user_cfg_access(struct pci_dev *dev) { }
753 static inline void pci_unblock_user_cfg_access(struct pci_dev *dev) { }
755 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
758 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
762 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
766 #endif /* CONFIG_PCI */
768 /* Include architecture-dependent settings and functions */
772 /* these helpers provide future and backwards compatibility
773 * for accessing popular PCI BAR info */
774 #define pci_resource_start(dev,bar) ((dev)->resource[(bar)].start)
775 #define pci_resource_end(dev,bar) ((dev)->resource[(bar)].end)
776 #define pci_resource_flags(dev,bar) ((dev)->resource[(bar)].flags)
777 #define pci_resource_len(dev,bar) \
778 ((pci_resource_start((dev),(bar)) == 0 && \
779 pci_resource_end((dev),(bar)) == \
780 pci_resource_start((dev),(bar))) ? 0 : \
782 (pci_resource_end((dev),(bar)) - \
783 pci_resource_start((dev),(bar)) + 1))
785 /* Similar to the helpers above, these manipulate per-pci_dev
786 * driver-specific data. They are really just a wrapper around
787 * the generic device structure functions of these calls.
789 static inline void *pci_get_drvdata (struct pci_dev *pdev)
791 return dev_get_drvdata(&pdev->dev);
794 static inline void pci_set_drvdata (struct pci_dev *pdev, void *data)
796 dev_set_drvdata(&pdev->dev, data);
799 /* If you want to know what to call your pci_dev, ask this function.
800 * Again, it's a wrapper around the generic device.
802 static inline char *pci_name(struct pci_dev *pdev)
804 return pdev->dev.bus_id;
808 /* Some archs don't want to expose struct resource to userland as-is
811 #ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
812 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
813 const struct resource *rsrc, resource_size_t *start,
814 resource_size_t *end)
816 *start = rsrc->start;
819 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
823 * The world is not perfect and supplies us with broken PCI devices.
824 * For at least a part of these bugs we need a work-around, so both
825 * generic (drivers/pci/quirks.c) and per-architecture code can define
826 * fixup hooks to be called for particular buggy devices.
830 u16 vendor, device; /* You can use PCI_ANY_ID here of course */
831 void (*hook)(struct pci_dev *dev);
834 enum pci_fixup_pass {
835 pci_fixup_early, /* Before probing BARs */
836 pci_fixup_header, /* After reading configuration header */
837 pci_fixup_final, /* Final phase of device fixups */
838 pci_fixup_enable, /* pci_enable_device() time */
839 pci_fixup_resume, /* pci_enable_device() time */
842 /* Anonymous variables would be nice... */
843 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook) \
844 static const struct pci_fixup __pci_fixup_##name __attribute_used__ \
845 __attribute__((__section__(#section))) = { vendor, device, hook };
846 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
847 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
848 vendor##device##hook, vendor, device, hook)
849 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
850 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
851 vendor##device##hook, vendor, device, hook)
852 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
853 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
854 vendor##device##hook, vendor, device, hook)
855 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
856 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
857 vendor##device##hook, vendor, device, hook)
858 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
859 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
860 resume##vendor##device##hook, vendor, device, hook)
863 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
865 void __iomem * pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
866 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
867 void __iomem * const * pcim_iomap_table(struct pci_dev *pdev);
868 int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name);
869 void pcim_iounmap_regions(struct pci_dev *pdev, u16 mask);
871 extern int pci_pci_problems;
872 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
873 #define PCIPCI_TRITON 2
874 #define PCIPCI_NATOMA 4
875 #define PCIPCI_VIAETBF 8
876 #define PCIPCI_VSFX 16
877 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
878 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
880 extern unsigned long pci_cardbus_io_size;
881 extern unsigned long pci_cardbus_mem_size;
883 extern int pcibios_add_platform_entries(struct pci_dev *dev);
885 #endif /* __KERNEL__ */
886 #endif /* LINUX_PCI_H */