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 void pcie_wait_pending_transaction(struct pci_dev *dev);
517 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
519 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
520 struct pci_dev *from);
521 struct pci_dev *pci_get_device_reverse(unsigned int vendor, unsigned int device,
522 struct pci_dev *from);
524 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
525 unsigned int ss_vendor, unsigned int ss_device,
526 struct pci_dev *from);
527 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
528 struct pci_dev *pci_get_bus_and_slot(unsigned int bus, unsigned int devfn);
529 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
530 int pci_dev_present(const struct pci_device_id *ids);
531 const struct pci_device_id *pci_find_present(const struct pci_device_id *ids);
533 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
535 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
536 int where, u16 *val);
537 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
538 int where, u32 *val);
539 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
541 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
543 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
546 static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val)
548 return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
550 static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val)
552 return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
554 static inline int pci_read_config_dword(struct pci_dev *dev, int where,
557 return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
559 static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val)
561 return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
563 static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val)
565 return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
567 static inline int pci_write_config_dword(struct pci_dev *dev, int where,
570 return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
573 int __must_check pci_enable_device(struct pci_dev *dev);
574 int __must_check pci_enable_device_io(struct pci_dev *dev);
575 int __must_check pci_enable_device_mem(struct pci_dev *dev);
576 int __must_check pci_reenable_device(struct pci_dev *);
577 int __must_check pcim_enable_device(struct pci_dev *pdev);
578 void pcim_pin_device(struct pci_dev *pdev);
580 static inline int pci_is_managed(struct pci_dev *pdev)
582 return pdev->is_managed;
585 void pci_disable_device(struct pci_dev *dev);
586 void pci_set_master(struct pci_dev *dev);
587 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
588 #define HAVE_PCI_SET_MWI
589 int __must_check pci_set_mwi(struct pci_dev *dev);
590 int pci_try_set_mwi(struct pci_dev *dev);
591 void pci_clear_mwi(struct pci_dev *dev);
592 void pci_intx(struct pci_dev *dev, int enable);
593 void pci_msi_off(struct pci_dev *dev);
594 int pci_set_dma_mask(struct pci_dev *dev, u64 mask);
595 int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask);
596 int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size);
597 int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask);
598 int pcix_get_max_mmrbc(struct pci_dev *dev);
599 int pcix_get_mmrbc(struct pci_dev *dev);
600 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
601 int pcie_get_readrq(struct pci_dev *dev);
602 int pcie_set_readrq(struct pci_dev *dev, int rq);
603 void pci_update_resource(struct pci_dev *dev, struct resource *res, int resno);
604 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
605 int __must_check pci_assign_resource_fixed(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 void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
631 int (*)(struct pci_dev *, u8, u8));
632 #define HAVE_PCI_REQ_REGIONS 2
633 int __must_check pci_request_regions(struct pci_dev *, const char *);
634 void pci_release_regions(struct pci_dev *);
635 int __must_check pci_request_region(struct pci_dev *, int, const char *);
636 void pci_release_region(struct pci_dev *, int);
637 int pci_request_selected_regions(struct pci_dev *, int, const char *);
638 void pci_release_selected_regions(struct pci_dev *, int);
640 /* drivers/pci/bus.c */
641 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
642 struct resource *res, resource_size_t size,
643 resource_size_t align, resource_size_t min,
644 unsigned int type_mask,
645 void (*alignf)(void *, struct resource *,
646 resource_size_t, resource_size_t),
648 void pci_enable_bridges(struct pci_bus *bus);
650 /* Proper probing supporting hot-pluggable devices */
651 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
652 const char *mod_name);
653 static inline int __must_check pci_register_driver(struct pci_driver *driver)
655 return __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME);
658 void pci_unregister_driver(struct pci_driver *dev);
659 void pci_remove_behind_bridge(struct pci_dev *dev);
660 struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
661 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
662 struct pci_dev *dev);
663 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
666 void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *),
668 int pci_cfg_space_size(struct pci_dev *dev);
669 unsigned char pci_bus_max_busnr(struct pci_bus *bus);
671 /* kmem_cache style wrapper around pci_alloc_consistent() */
673 #include <linux/dmapool.h>
675 #define pci_pool dma_pool
676 #define pci_pool_create(name, pdev, size, align, allocation) \
677 dma_pool_create(name, &pdev->dev, size, align, allocation)
678 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
679 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
680 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
682 enum pci_dma_burst_strategy {
683 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
684 strategy_parameter is N/A */
685 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
687 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
688 strategy_parameter byte boundaries */
692 u16 vector; /* kernel uses to write allocated vector */
693 u16 entry; /* driver uses to specify entry, OS writes */
697 #ifndef CONFIG_PCI_MSI
698 static inline int pci_enable_msi(struct pci_dev *dev)
703 static inline void pci_disable_msi(struct pci_dev *dev)
706 static inline int pci_enable_msix(struct pci_dev *dev,
707 struct msix_entry *entries, int nvec)
712 static inline void pci_disable_msix(struct pci_dev *dev)
715 static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev)
718 static inline void pci_restore_msi_state(struct pci_dev *dev)
721 extern int pci_enable_msi(struct pci_dev *dev);
722 extern void pci_disable_msi(struct pci_dev *dev);
723 extern int pci_enable_msix(struct pci_dev *dev,
724 struct msix_entry *entries, int nvec);
725 extern void pci_disable_msix(struct pci_dev *dev);
726 extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
727 extern void pci_restore_msi_state(struct pci_dev *dev);
731 /* The functions a driver should call */
732 int ht_create_irq(struct pci_dev *dev, int idx);
733 void ht_destroy_irq(unsigned int irq);
734 #endif /* CONFIG_HT_IRQ */
736 extern void pci_block_user_cfg_access(struct pci_dev *dev);
737 extern void pci_unblock_user_cfg_access(struct pci_dev *dev);
740 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
741 * a PCI domain is defined to be a set of PCI busses which share
742 * configuration space.
744 #ifdef CONFIG_PCI_DOMAINS
745 extern int pci_domains_supported;
747 enum { pci_domains_supported = 0 };
748 static inline int pci_domain_nr(struct pci_bus *bus)
753 static inline int pci_proc_domain(struct pci_bus *bus)
757 #endif /* CONFIG_PCI_DOMAINS */
759 #else /* CONFIG_PCI is not enabled */
762 * If the system does not have PCI, clearly these return errors. Define
763 * these as simple inline functions to avoid hair in drivers.
766 #define _PCI_NOP(o, s, t) \
767 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
769 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
771 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
772 _PCI_NOP(o, word, u16 x) \
773 _PCI_NOP(o, dword, u32 x)
774 _PCI_NOP_ALL(read, *)
777 static inline struct pci_dev *pci_find_device(unsigned int vendor,
779 const struct pci_dev *from)
784 static inline struct pci_dev *pci_find_slot(unsigned int bus,
790 static inline struct pci_dev *pci_get_device(unsigned int vendor,
792 struct pci_dev *from)
797 static inline struct pci_dev *pci_get_device_reverse(unsigned int vendor,
799 struct pci_dev *from)
804 static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
806 unsigned int ss_vendor,
807 unsigned int ss_device,
808 struct pci_dev *from)
813 static inline struct pci_dev *pci_get_class(unsigned int class,
814 struct pci_dev *from)
819 #define pci_dev_present(ids) (0)
820 #define no_pci_devices() (1)
821 #define pci_find_present(ids) (NULL)
822 #define pci_dev_put(dev) do { } while (0)
824 static inline void pci_set_master(struct pci_dev *dev)
827 static inline int pci_enable_device(struct pci_dev *dev)
832 static inline void pci_disable_device(struct pci_dev *dev)
835 static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
840 static inline int pci_set_dma_max_seg_size(struct pci_dev *dev,
846 static inline int pci_set_dma_seg_boundary(struct pci_dev *dev,
852 static inline int pci_assign_resource(struct pci_dev *dev, int i)
857 static inline int __pci_register_driver(struct pci_driver *drv,
858 struct module *owner)
863 static inline int pci_register_driver(struct pci_driver *drv)
868 static inline void pci_unregister_driver(struct pci_driver *drv)
871 static inline int pci_find_capability(struct pci_dev *dev, int cap)
876 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
882 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
887 static inline void pcie_wait_pending_transaction(struct pci_dev *dev)
890 /* Power management related routines */
891 static inline int pci_save_state(struct pci_dev *dev)
896 static inline int pci_restore_state(struct pci_dev *dev)
901 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
906 static inline pci_power_t pci_choose_state(struct pci_dev *dev,
912 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
918 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
923 static inline void pci_release_regions(struct pci_dev *dev)
926 #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
928 static inline void pci_block_user_cfg_access(struct pci_dev *dev)
931 static inline void pci_unblock_user_cfg_access(struct pci_dev *dev)
934 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
937 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
941 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
945 #endif /* CONFIG_PCI */
947 /* Include architecture-dependent settings and functions */
951 /* these helpers provide future and backwards compatibility
952 * for accessing popular PCI BAR info */
953 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
954 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
955 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
956 #define pci_resource_len(dev,bar) \
957 ((pci_resource_start((dev), (bar)) == 0 && \
958 pci_resource_end((dev), (bar)) == \
959 pci_resource_start((dev), (bar))) ? 0 : \
961 (pci_resource_end((dev), (bar)) - \
962 pci_resource_start((dev), (bar)) + 1))
964 /* Similar to the helpers above, these manipulate per-pci_dev
965 * driver-specific data. They are really just a wrapper around
966 * the generic device structure functions of these calls.
968 static inline void *pci_get_drvdata(struct pci_dev *pdev)
970 return dev_get_drvdata(&pdev->dev);
973 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
975 dev_set_drvdata(&pdev->dev, data);
978 /* If you want to know what to call your pci_dev, ask this function.
979 * Again, it's a wrapper around the generic device.
981 static inline char *pci_name(struct pci_dev *pdev)
983 return pdev->dev.bus_id;
987 /* Some archs don't want to expose struct resource to userland as-is
990 #ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
991 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
992 const struct resource *rsrc, resource_size_t *start,
993 resource_size_t *end)
995 *start = rsrc->start;
998 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
1002 * The world is not perfect and supplies us with broken PCI devices.
1003 * For at least a part of these bugs we need a work-around, so both
1004 * generic (drivers/pci/quirks.c) and per-architecture code can define
1005 * fixup hooks to be called for particular buggy devices.
1009 u16 vendor, device; /* You can use PCI_ANY_ID here of course */
1010 void (*hook)(struct pci_dev *dev);
1013 enum pci_fixup_pass {
1014 pci_fixup_early, /* Before probing BARs */
1015 pci_fixup_header, /* After reading configuration header */
1016 pci_fixup_final, /* Final phase of device fixups */
1017 pci_fixup_enable, /* pci_enable_device() time */
1018 pci_fixup_resume, /* pci_enable_device() time */
1021 /* Anonymous variables would be nice... */
1022 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook) \
1023 static const struct pci_fixup __pci_fixup_##name __used \
1024 __attribute__((__section__(#section))) = { vendor, device, hook };
1025 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
1026 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1027 vendor##device##hook, vendor, device, hook)
1028 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
1029 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1030 vendor##device##hook, vendor, device, hook)
1031 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
1032 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1033 vendor##device##hook, vendor, device, hook)
1034 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
1035 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1036 vendor##device##hook, vendor, device, hook)
1037 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
1038 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1039 resume##vendor##device##hook, vendor, device, hook)
1042 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
1044 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
1045 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
1046 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
1047 int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name);
1048 void pcim_iounmap_regions(struct pci_dev *pdev, u16 mask);
1050 extern int pci_pci_problems;
1051 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
1052 #define PCIPCI_TRITON 2
1053 #define PCIPCI_NATOMA 4
1054 #define PCIPCI_VIAETBF 8
1055 #define PCIPCI_VSFX 16
1056 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
1057 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
1059 extern unsigned long pci_cardbus_io_size;
1060 extern unsigned long pci_cardbus_mem_size;
1062 extern int pcibios_add_platform_entries(struct pci_dev *dev);
1064 #endif /* __KERNEL__ */
1065 #endif /* LINUX_PCI_H */