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 <linux/pci_regs.h> /* The pci register defines */
23 * The PCI interface treats multi-function devices as independent
24 * devices. The slot/function address of each device is encoded
25 * in a single byte as follows:
30 #define PCI_DEVFN(slot, func) ((((slot) & 0x1f) << 3) | ((func) & 0x07))
31 #define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f)
32 #define PCI_FUNC(devfn) ((devfn) & 0x07)
34 /* Ioctls for /proc/bus/pci/X/Y nodes. */
35 #define PCIIOC_BASE ('P' << 24 | 'C' << 16 | 'I' << 8)
36 #define PCIIOC_CONTROLLER (PCIIOC_BASE | 0x00) /* Get controller for PCI device. */
37 #define PCIIOC_MMAP_IS_IO (PCIIOC_BASE | 0x01) /* Set mmap state to I/O space. */
38 #define PCIIOC_MMAP_IS_MEM (PCIIOC_BASE | 0x02) /* Set mmap state to MEM space. */
39 #define PCIIOC_WRITE_COMBINE (PCIIOC_BASE | 0x03) /* Enable/disable write-combining. */
43 #include <linux/mod_devicetable.h>
45 #include <linux/types.h>
46 #include <linux/init.h>
47 #include <linux/ioport.h>
48 #include <linux/list.h>
49 #include <linux/compiler.h>
50 #include <linux/errno.h>
51 #include <linux/kobject.h>
52 #include <asm/atomic.h>
53 #include <linux/device.h>
56 /* Include the ID list */
57 #include <linux/pci_ids.h>
59 /* pci_slot represents a physical slot */
61 struct pci_bus *bus; /* The bus this slot is on */
62 struct list_head list; /* node in list of slots on this bus */
63 struct hotplug_slot *hotplug; /* Hotplug info (migrate over time) */
64 unsigned char number; /* PCI_SLOT(pci_dev->devfn) */
68 static inline const char *pci_slot_name(const struct pci_slot *slot)
70 return kobject_name(&slot->kobj);
73 /* File state for mmap()s on /proc/bus/pci/X/Y */
79 /* This defines the direction arg to the DMA mapping routines. */
80 #define PCI_DMA_BIDIRECTIONAL 0
81 #define PCI_DMA_TODEVICE 1
82 #define PCI_DMA_FROMDEVICE 2
83 #define PCI_DMA_NONE 3
86 * For PCI devices, the region numbers are assigned this way:
89 /* #0-5: standard PCI resources */
91 PCI_STD_RESOURCE_END = 5,
93 /* #6: expansion ROM resource */
96 /* resources assigned to buses behind the bridge */
97 #define PCI_BRIDGE_RESOURCE_NUM 4
100 PCI_BRIDGE_RESOURCE_END = PCI_BRIDGE_RESOURCES +
101 PCI_BRIDGE_RESOURCE_NUM - 1,
103 /* total resources associated with a PCI device */
106 /* preserve this for compatibility */
107 DEVICE_COUNT_RESOURCE
110 typedef int __bitwise pci_power_t;
112 #define PCI_D0 ((pci_power_t __force) 0)
113 #define PCI_D1 ((pci_power_t __force) 1)
114 #define PCI_D2 ((pci_power_t __force) 2)
115 #define PCI_D3hot ((pci_power_t __force) 3)
116 #define PCI_D3cold ((pci_power_t __force) 4)
117 #define PCI_UNKNOWN ((pci_power_t __force) 5)
118 #define PCI_POWER_ERROR ((pci_power_t __force) -1)
120 /** The pci_channel state describes connectivity between the CPU and
121 * the pci device. If some PCI bus between here and the pci device
122 * has crashed or locked up, this info is reflected here.
124 typedef unsigned int __bitwise pci_channel_state_t;
126 enum pci_channel_state {
127 /* I/O channel is in normal state */
128 pci_channel_io_normal = (__force pci_channel_state_t) 1,
130 /* I/O to channel is blocked */
131 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
133 /* PCI card is dead */
134 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
137 typedef unsigned int __bitwise pcie_reset_state_t;
139 enum pcie_reset_state {
140 /* Reset is NOT asserted (Use to deassert reset) */
141 pcie_deassert_reset = (__force pcie_reset_state_t) 1,
143 /* Use #PERST to reset PCI-E device */
144 pcie_warm_reset = (__force pcie_reset_state_t) 2,
146 /* Use PCI-E Hot Reset to reset device */
147 pcie_hot_reset = (__force pcie_reset_state_t) 3
150 typedef unsigned short __bitwise pci_dev_flags_t;
152 /* INTX_DISABLE in PCI_COMMAND register disables MSI
155 PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) 1,
156 /* Device configuration is irrevocably lost if disabled into D3 */
157 PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) 2,
160 enum pci_irq_reroute_variant {
161 INTEL_IRQ_REROUTE_VARIANT = 1,
162 MAX_IRQ_REROUTE_VARIANTS = 3
165 typedef unsigned short __bitwise pci_bus_flags_t;
167 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
168 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
171 struct pci_cap_saved_state {
172 struct hlist_node next;
177 struct pcie_link_state;
181 * The pci_dev structure is used to describe PCI devices.
184 struct list_head bus_list; /* node in per-bus list */
185 struct pci_bus *bus; /* bus this device is on */
186 struct pci_bus *subordinate; /* bus this device bridges to */
188 void *sysdata; /* hook for sys-specific extension */
189 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
190 struct pci_slot *slot; /* Physical slot this device is in */
192 unsigned int devfn; /* encoded device & function index */
193 unsigned short vendor;
194 unsigned short device;
195 unsigned short subsystem_vendor;
196 unsigned short subsystem_device;
197 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
198 u8 revision; /* PCI revision, low byte of class word */
199 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
200 u8 pcie_type; /* PCI-E device/port type */
201 u8 rom_base_reg; /* which config register controls the ROM */
202 u8 pin; /* which interrupt pin this device uses */
204 struct pci_driver *driver; /* which driver has allocated this device */
205 u64 dma_mask; /* Mask of the bits of bus address this
206 device implements. Normally this is
207 0xffffffff. You only need to change
208 this if your device has broken DMA
209 or supports 64-bit transfers. */
211 struct device_dma_parameters dma_parms;
213 pci_power_t current_state; /* Current operating state. In ACPI-speak,
214 this is D0-D3, D0 being fully functional,
216 int pm_cap; /* PM capability offset in the
217 configuration space */
218 unsigned int pme_support:5; /* Bitmask of states from which PME#
220 unsigned int d1_support:1; /* Low power state D1 is supported */
221 unsigned int d2_support:1; /* Low power state D2 is supported */
222 unsigned int no_d1d2:1; /* Only allow D0 and D3 */
224 #ifdef CONFIG_PCIEASPM
225 struct pcie_link_state *link_state; /* ASPM link state. */
228 pci_channel_state_t error_state; /* current connectivity state */
229 struct device dev; /* Generic device interface */
231 int cfg_size; /* Size of configuration space */
234 * Instead of touching interrupt line and base address registers
235 * directly, use the values stored here. They might be different!
238 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
240 /* These fields are used by common fixups */
241 unsigned int transparent:1; /* Transparent PCI bridge */
242 unsigned int multifunction:1;/* Part of multi-function device */
243 /* keep track of device state */
244 unsigned int is_added:1;
245 unsigned int is_busmaster:1; /* device is busmaster */
246 unsigned int no_msi:1; /* device may not use msi */
247 unsigned int block_ucfg_access:1; /* userspace config space access is blocked */
248 unsigned int broken_parity_status:1; /* Device generates false positive parity */
249 unsigned int irq_reroute_variant:2; /* device needs IRQ rerouting variant */
250 unsigned int msi_enabled:1;
251 unsigned int msix_enabled:1;
252 unsigned int ari_enabled:1; /* ARI forwarding */
253 unsigned int is_managed:1;
254 unsigned int is_pcie:1;
255 pci_dev_flags_t dev_flags;
256 atomic_t enable_cnt; /* pci_enable_device has been called */
258 u32 saved_config_space[16]; /* config space saved at suspend time */
259 struct hlist_head saved_cap_space;
260 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
261 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
262 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
263 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
264 #ifdef CONFIG_PCI_MSI
265 struct list_head msi_list;
270 extern struct pci_dev *alloc_pci_dev(void);
272 #define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
273 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
274 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
276 static inline int pci_channel_offline(struct pci_dev *pdev)
278 return (pdev->error_state != pci_channel_io_normal);
281 static inline struct pci_cap_saved_state *pci_find_saved_cap(
282 struct pci_dev *pci_dev, char cap)
284 struct pci_cap_saved_state *tmp;
285 struct hlist_node *pos;
287 hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) {
288 if (tmp->cap_nr == cap)
294 static inline void pci_add_saved_cap(struct pci_dev *pci_dev,
295 struct pci_cap_saved_state *new_cap)
297 hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space);
300 #ifndef PCI_BUS_NUM_RESOURCES
301 #define PCI_BUS_NUM_RESOURCES 16
304 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
307 struct list_head node; /* node in list of buses */
308 struct pci_bus *parent; /* parent bus this bridge is on */
309 struct list_head children; /* list of child buses */
310 struct list_head devices; /* list of devices on this bus */
311 struct pci_dev *self; /* bridge device as seen by parent */
312 struct list_head slots; /* list of slots on this bus */
313 struct resource *resource[PCI_BUS_NUM_RESOURCES];
314 /* address space routed to this bus */
316 struct pci_ops *ops; /* configuration access functions */
317 void *sysdata; /* hook for sys-specific extension */
318 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
320 unsigned char number; /* bus number */
321 unsigned char primary; /* number of primary bridge */
322 unsigned char secondary; /* number of secondary bridge */
323 unsigned char subordinate; /* max number of subordinate buses */
327 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
328 pci_bus_flags_t bus_flags; /* Inherited by child busses */
329 struct device *bridge;
331 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
332 struct bin_attribute *legacy_mem; /* legacy mem */
333 unsigned int is_added:1;
336 #define pci_bus_b(n) list_entry(n, struct pci_bus, node)
337 #define to_pci_bus(n) container_of(n, struct pci_bus, dev)
339 #ifdef CONFIG_PCI_MSI
340 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
342 return pci_dev->msi_enabled || pci_dev->msix_enabled;
345 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
349 * Error values that may be returned by PCI functions.
351 #define PCIBIOS_SUCCESSFUL 0x00
352 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
353 #define PCIBIOS_BAD_VENDOR_ID 0x83
354 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
355 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
356 #define PCIBIOS_SET_FAILED 0x88
357 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
359 /* Low-level architecture-dependent routines */
362 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
363 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
367 * ACPI needs to be able to access PCI config space before we've done a
368 * PCI bus scan and created pci_bus structures.
370 extern int raw_pci_read(unsigned int domain, unsigned int bus,
371 unsigned int devfn, int reg, int len, u32 *val);
372 extern int raw_pci_write(unsigned int domain, unsigned int bus,
373 unsigned int devfn, int reg, int len, u32 val);
375 struct pci_bus_region {
376 resource_size_t start;
381 spinlock_t lock; /* protects list, index */
382 struct list_head list; /* for IDs added at runtime */
385 /* ---------------------------------------------------------------- */
386 /** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
387 * a set of callbacks in struct pci_error_handlers, then that device driver
388 * will be notified of PCI bus errors, and will be driven to recovery
389 * when an error occurs.
392 typedef unsigned int __bitwise pci_ers_result_t;
394 enum pci_ers_result {
395 /* no result/none/not supported in device driver */
396 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
398 /* Device driver can recover without slot reset */
399 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
401 /* Device driver wants slot to be reset. */
402 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
404 /* Device has completely failed, is unrecoverable */
405 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
407 /* Device driver is fully recovered and operational */
408 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
411 /* PCI bus error event callbacks */
412 struct pci_error_handlers {
413 /* PCI bus error detected on this device */
414 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
415 enum pci_channel_state error);
417 /* MMIO has been re-enabled, but not DMA */
418 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
420 /* PCI Express link has been reset */
421 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
423 /* PCI slot has been reset */
424 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
426 /* Device driver may resume normal operations */
427 void (*resume)(struct pci_dev *dev);
430 /* ---------------------------------------------------------------- */
434 struct list_head node;
436 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
437 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
438 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
439 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
440 int (*suspend_late) (struct pci_dev *dev, pm_message_t state);
441 int (*resume_early) (struct pci_dev *dev);
442 int (*resume) (struct pci_dev *dev); /* Device woken up */
443 void (*shutdown) (struct pci_dev *dev);
444 struct pci_error_handlers *err_handler;
445 struct device_driver driver;
446 struct pci_dynids dynids;
449 #define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
452 * DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table
453 * @_table: device table name
455 * This macro is used to create a struct pci_device_id array (a device table)
456 * in a generic manner.
458 #define DEFINE_PCI_DEVICE_TABLE(_table) \
459 const struct pci_device_id _table[] __devinitconst
462 * PCI_DEVICE - macro used to describe a specific pci device
463 * @vend: the 16 bit PCI Vendor ID
464 * @dev: the 16 bit PCI Device ID
466 * This macro is used to create a struct pci_device_id that matches a
467 * specific device. The subvendor and subdevice fields will be set to
470 #define PCI_DEVICE(vend,dev) \
471 .vendor = (vend), .device = (dev), \
472 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
475 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
476 * @dev_class: the class, subclass, prog-if triple for this device
477 * @dev_class_mask: the class mask for this device
479 * This macro is used to create a struct pci_device_id that matches a
480 * specific PCI class. The vendor, device, subvendor, and subdevice
481 * fields will be set to PCI_ANY_ID.
483 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
484 .class = (dev_class), .class_mask = (dev_class_mask), \
485 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
486 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
489 * PCI_VDEVICE - macro used to describe a specific pci device in short form
490 * @vendor: the vendor name
491 * @device: the 16 bit PCI Device ID
493 * This macro is used to create a struct pci_device_id that matches a
494 * specific PCI device. The subvendor, and subdevice fields will be set
495 * to PCI_ANY_ID. The macro allows the next field to follow as the device
499 #define PCI_VDEVICE(vendor, device) \
500 PCI_VENDOR_ID_##vendor, (device), \
501 PCI_ANY_ID, PCI_ANY_ID, 0, 0
503 /* these external functions are only available when PCI support is enabled */
506 extern struct bus_type pci_bus_type;
508 /* Do NOT directly access these two variables, unless you are arch specific pci
509 * code, or pci core code. */
510 extern struct list_head pci_root_buses; /* list of all known PCI buses */
511 /* Some device drivers need know if pci is initiated */
512 extern int no_pci_devices(void);
514 void pcibios_fixup_bus(struct pci_bus *);
515 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
516 char *pcibios_setup(char *str);
518 /* Used only when drivers/pci/setup.c is used */
519 void pcibios_align_resource(void *, struct resource *, resource_size_t,
521 void pcibios_update_irq(struct pci_dev *, int irq);
523 /* Generic PCI functions used internally */
525 extern struct pci_bus *pci_find_bus(int domain, int busnr);
526 void pci_bus_add_devices(struct pci_bus *bus);
527 struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
528 struct pci_ops *ops, void *sysdata);
529 static inline struct pci_bus * __devinit pci_scan_bus(int bus, struct pci_ops *ops,
532 struct pci_bus *root_bus;
533 root_bus = pci_scan_bus_parented(NULL, bus, ops, sysdata);
535 pci_bus_add_devices(root_bus);
538 struct pci_bus *pci_create_bus(struct device *parent, int bus,
539 struct pci_ops *ops, void *sysdata);
540 struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
542 struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
544 struct hotplug_slot *hotplug);
545 void pci_destroy_slot(struct pci_slot *slot);
546 void pci_renumber_slot(struct pci_slot *slot, int slot_nr);
547 int pci_scan_slot(struct pci_bus *bus, int devfn);
548 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
549 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
550 unsigned int pci_scan_child_bus(struct pci_bus *bus);
551 int __must_check pci_bus_add_device(struct pci_dev *dev);
552 void pci_read_bridge_bases(struct pci_bus *child);
553 struct resource *pci_find_parent_resource(const struct pci_dev *dev,
554 struct resource *res);
555 u8 pci_swizzle_interrupt_pin(struct pci_dev *dev, u8 pin);
556 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
557 u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
558 extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
559 extern void pci_dev_put(struct pci_dev *dev);
560 extern void pci_remove_bus(struct pci_bus *b);
561 extern void pci_remove_bus_device(struct pci_dev *dev);
562 extern void pci_stop_bus_device(struct pci_dev *dev);
563 void pci_setup_cardbus(struct pci_bus *bus);
564 extern void pci_sort_breadthfirst(void);
566 /* Generic PCI functions exported to card drivers */
568 #ifdef CONFIG_PCI_LEGACY
569 struct pci_dev __deprecated *pci_find_device(unsigned int vendor,
571 struct pci_dev *from);
572 struct pci_dev __deprecated *pci_find_slot(unsigned int bus,
574 #endif /* CONFIG_PCI_LEGACY */
576 enum pci_lost_interrupt_reason {
577 PCI_LOST_IRQ_NO_INFORMATION = 0,
578 PCI_LOST_IRQ_DISABLE_MSI,
579 PCI_LOST_IRQ_DISABLE_MSIX,
580 PCI_LOST_IRQ_DISABLE_ACPI,
582 enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *dev);
583 int pci_find_capability(struct pci_dev *dev, int cap);
584 int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
585 int pci_find_ext_capability(struct pci_dev *dev, int cap);
586 int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
587 int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
588 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
590 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
591 struct pci_dev *from);
592 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
593 unsigned int ss_vendor, unsigned int ss_device,
594 struct pci_dev *from);
595 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
596 struct pci_dev *pci_get_bus_and_slot(unsigned int bus, unsigned int devfn);
597 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
598 int pci_dev_present(const struct pci_device_id *ids);
600 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
602 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
603 int where, u16 *val);
604 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
605 int where, u32 *val);
606 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
608 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
610 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
613 static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val)
615 return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
617 static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val)
619 return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
621 static inline int pci_read_config_dword(struct pci_dev *dev, int where,
624 return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
626 static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val)
628 return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
630 static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val)
632 return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
634 static inline int pci_write_config_dword(struct pci_dev *dev, int where,
637 return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
640 int __must_check pci_enable_device(struct pci_dev *dev);
641 int __must_check pci_enable_device_io(struct pci_dev *dev);
642 int __must_check pci_enable_device_mem(struct pci_dev *dev);
643 int __must_check pci_reenable_device(struct pci_dev *);
644 int __must_check pcim_enable_device(struct pci_dev *pdev);
645 void pcim_pin_device(struct pci_dev *pdev);
647 static inline int pci_is_managed(struct pci_dev *pdev)
649 return pdev->is_managed;
652 void pci_disable_device(struct pci_dev *dev);
653 void pci_set_master(struct pci_dev *dev);
654 void pci_clear_master(struct pci_dev *dev);
655 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
656 #define HAVE_PCI_SET_MWI
657 int __must_check pci_set_mwi(struct pci_dev *dev);
658 int pci_try_set_mwi(struct pci_dev *dev);
659 void pci_clear_mwi(struct pci_dev *dev);
660 void pci_intx(struct pci_dev *dev, int enable);
661 void pci_msi_off(struct pci_dev *dev);
662 int pci_set_dma_mask(struct pci_dev *dev, u64 mask);
663 int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask);
664 int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size);
665 int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask);
666 int pcix_get_max_mmrbc(struct pci_dev *dev);
667 int pcix_get_mmrbc(struct pci_dev *dev);
668 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
669 int pcie_get_readrq(struct pci_dev *dev);
670 int pcie_set_readrq(struct pci_dev *dev, int rq);
671 int pci_reset_function(struct pci_dev *dev);
672 int pci_execute_reset_function(struct pci_dev *dev);
673 void pci_update_resource(struct pci_dev *dev, int resno);
674 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
675 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
677 /* ROM control related routines */
678 int pci_enable_rom(struct pci_dev *pdev);
679 void pci_disable_rom(struct pci_dev *pdev);
680 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
681 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
682 size_t pci_get_rom_size(void __iomem *rom, size_t size);
684 /* Power management related routines */
685 int pci_save_state(struct pci_dev *dev);
686 int pci_restore_state(struct pci_dev *dev);
687 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
688 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
689 bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
690 void pci_pme_active(struct pci_dev *dev, bool enable);
691 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable);
692 int pci_wake_from_d3(struct pci_dev *dev, bool enable);
693 pci_power_t pci_target_state(struct pci_dev *dev);
694 int pci_prepare_to_sleep(struct pci_dev *dev);
695 int pci_back_from_sleep(struct pci_dev *dev);
697 /* Functions for PCI Hotplug drivers to use */
698 int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
700 /* Vital product data routines */
701 ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
702 ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
703 int pci_vpd_truncate(struct pci_dev *dev, size_t size);
705 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
706 void pci_bus_assign_resources(struct pci_bus *bus);
707 void pci_bus_size_bridges(struct pci_bus *bus);
708 int pci_claim_resource(struct pci_dev *, int);
709 void pci_assign_unassigned_resources(void);
710 void pdev_enable_device(struct pci_dev *);
711 void pdev_sort_resources(struct pci_dev *, struct resource_list *);
712 int pci_enable_resources(struct pci_dev *, int mask);
713 void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
714 int (*)(struct pci_dev *, u8, u8));
715 #define HAVE_PCI_REQ_REGIONS 2
716 int __must_check pci_request_regions(struct pci_dev *, const char *);
717 int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
718 void pci_release_regions(struct pci_dev *);
719 int __must_check pci_request_region(struct pci_dev *, int, const char *);
720 int __must_check pci_request_region_exclusive(struct pci_dev *, int, const char *);
721 void pci_release_region(struct pci_dev *, int);
722 int pci_request_selected_regions(struct pci_dev *, int, const char *);
723 int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
724 void pci_release_selected_regions(struct pci_dev *, int);
726 /* drivers/pci/bus.c */
727 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
728 struct resource *res, resource_size_t size,
729 resource_size_t align, resource_size_t min,
730 unsigned int type_mask,
731 void (*alignf)(void *, struct resource *,
732 resource_size_t, resource_size_t),
734 void pci_enable_bridges(struct pci_bus *bus);
736 /* Proper probing supporting hot-pluggable devices */
737 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
738 const char *mod_name);
741 * pci_register_driver must be a macro so that KBUILD_MODNAME can be expanded
743 #define pci_register_driver(driver) \
744 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
746 void pci_unregister_driver(struct pci_driver *dev);
747 void pci_remove_behind_bridge(struct pci_dev *dev);
748 struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
749 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
750 struct pci_dev *dev);
751 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
754 void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *),
756 int pci_cfg_space_size_ext(struct pci_dev *dev);
757 int pci_cfg_space_size(struct pci_dev *dev);
758 unsigned char pci_bus_max_busnr(struct pci_bus *bus);
760 /* kmem_cache style wrapper around pci_alloc_consistent() */
762 #include <linux/dmapool.h>
764 #define pci_pool dma_pool
765 #define pci_pool_create(name, pdev, size, align, allocation) \
766 dma_pool_create(name, &pdev->dev, size, align, allocation)
767 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
768 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
769 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
771 enum pci_dma_burst_strategy {
772 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
773 strategy_parameter is N/A */
774 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
776 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
777 strategy_parameter byte boundaries */
781 u32 vector; /* kernel uses to write allocated vector */
782 u16 entry; /* driver uses to specify entry, OS writes */
786 #ifndef CONFIG_PCI_MSI
787 static inline int pci_enable_msi(struct pci_dev *dev)
792 static inline void pci_msi_shutdown(struct pci_dev *dev)
794 static inline void pci_disable_msi(struct pci_dev *dev)
797 static inline int pci_enable_msix(struct pci_dev *dev,
798 struct msix_entry *entries, int nvec)
803 static inline void pci_msix_shutdown(struct pci_dev *dev)
805 static inline void pci_disable_msix(struct pci_dev *dev)
808 static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev)
811 static inline void pci_restore_msi_state(struct pci_dev *dev)
813 static inline int pci_msi_enabled(void)
818 extern int pci_enable_msi(struct pci_dev *dev);
819 extern void pci_msi_shutdown(struct pci_dev *dev);
820 extern void pci_disable_msi(struct pci_dev *dev);
821 extern int pci_enable_msix(struct pci_dev *dev,
822 struct msix_entry *entries, int nvec);
823 extern void pci_msix_shutdown(struct pci_dev *dev);
824 extern void pci_disable_msix(struct pci_dev *dev);
825 extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
826 extern void pci_restore_msi_state(struct pci_dev *dev);
827 extern int pci_msi_enabled(void);
830 #ifndef CONFIG_PCIEASPM
831 static inline int pcie_aspm_enabled(void)
836 extern int pcie_aspm_enabled(void);
840 /* The functions a driver should call */
841 int ht_create_irq(struct pci_dev *dev, int idx);
842 void ht_destroy_irq(unsigned int irq);
843 #endif /* CONFIG_HT_IRQ */
845 extern void pci_block_user_cfg_access(struct pci_dev *dev);
846 extern void pci_unblock_user_cfg_access(struct pci_dev *dev);
849 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
850 * a PCI domain is defined to be a set of PCI busses which share
851 * configuration space.
853 #ifdef CONFIG_PCI_DOMAINS
854 extern int pci_domains_supported;
856 enum { pci_domains_supported = 0 };
857 static inline int pci_domain_nr(struct pci_bus *bus)
862 static inline int pci_proc_domain(struct pci_bus *bus)
866 #endif /* CONFIG_PCI_DOMAINS */
868 #else /* CONFIG_PCI is not enabled */
871 * If the system does not have PCI, clearly these return errors. Define
872 * these as simple inline functions to avoid hair in drivers.
875 #define _PCI_NOP(o, s, t) \
876 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
878 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
880 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
881 _PCI_NOP(o, word, u16 x) \
882 _PCI_NOP(o, dword, u32 x)
883 _PCI_NOP_ALL(read, *)
886 static inline struct pci_dev *pci_find_device(unsigned int vendor,
888 struct pci_dev *from)
893 static inline struct pci_dev *pci_find_slot(unsigned int bus,
899 static inline struct pci_dev *pci_get_device(unsigned int vendor,
901 struct pci_dev *from)
906 static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
908 unsigned int ss_vendor,
909 unsigned int ss_device,
910 struct pci_dev *from)
915 static inline struct pci_dev *pci_get_class(unsigned int class,
916 struct pci_dev *from)
921 #define pci_dev_present(ids) (0)
922 #define no_pci_devices() (1)
923 #define pci_dev_put(dev) do { } while (0)
925 static inline void pci_set_master(struct pci_dev *dev)
928 static inline int pci_enable_device(struct pci_dev *dev)
933 static inline void pci_disable_device(struct pci_dev *dev)
936 static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
941 static inline int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
946 static inline int pci_set_dma_max_seg_size(struct pci_dev *dev,
952 static inline int pci_set_dma_seg_boundary(struct pci_dev *dev,
958 static inline int pci_assign_resource(struct pci_dev *dev, int i)
963 static inline int __pci_register_driver(struct pci_driver *drv,
964 struct module *owner)
969 static inline int pci_register_driver(struct pci_driver *drv)
974 static inline void pci_unregister_driver(struct pci_driver *drv)
977 static inline int pci_find_capability(struct pci_dev *dev, int cap)
982 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
988 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
993 /* Power management related routines */
994 static inline int pci_save_state(struct pci_dev *dev)
999 static inline int pci_restore_state(struct pci_dev *dev)
1004 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
1009 static inline pci_power_t pci_choose_state(struct pci_dev *dev,
1015 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1021 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
1026 static inline void pci_release_regions(struct pci_dev *dev)
1029 #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
1031 static inline void pci_block_user_cfg_access(struct pci_dev *dev)
1034 static inline void pci_unblock_user_cfg_access(struct pci_dev *dev)
1037 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
1040 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
1044 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
1048 #endif /* CONFIG_PCI */
1050 /* Include architecture-dependent settings and functions */
1052 #include <asm/pci.h>
1054 /* these helpers provide future and backwards compatibility
1055 * for accessing popular PCI BAR info */
1056 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
1057 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
1058 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
1059 #define pci_resource_len(dev,bar) \
1060 ((pci_resource_start((dev), (bar)) == 0 && \
1061 pci_resource_end((dev), (bar)) == \
1062 pci_resource_start((dev), (bar))) ? 0 : \
1064 (pci_resource_end((dev), (bar)) - \
1065 pci_resource_start((dev), (bar)) + 1))
1067 /* Similar to the helpers above, these manipulate per-pci_dev
1068 * driver-specific data. They are really just a wrapper around
1069 * the generic device structure functions of these calls.
1071 static inline void *pci_get_drvdata(struct pci_dev *pdev)
1073 return dev_get_drvdata(&pdev->dev);
1076 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
1078 dev_set_drvdata(&pdev->dev, data);
1081 /* If you want to know what to call your pci_dev, ask this function.
1082 * Again, it's a wrapper around the generic device.
1084 static inline const char *pci_name(struct pci_dev *pdev)
1086 return dev_name(&pdev->dev);
1090 /* Some archs don't want to expose struct resource to userland as-is
1091 * in sysfs and /proc
1093 #ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
1094 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
1095 const struct resource *rsrc, resource_size_t *start,
1096 resource_size_t *end)
1098 *start = rsrc->start;
1101 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
1105 * The world is not perfect and supplies us with broken PCI devices.
1106 * For at least a part of these bugs we need a work-around, so both
1107 * generic (drivers/pci/quirks.c) and per-architecture code can define
1108 * fixup hooks to be called for particular buggy devices.
1112 u16 vendor, device; /* You can use PCI_ANY_ID here of course */
1113 void (*hook)(struct pci_dev *dev);
1116 enum pci_fixup_pass {
1117 pci_fixup_early, /* Before probing BARs */
1118 pci_fixup_header, /* After reading configuration header */
1119 pci_fixup_final, /* Final phase of device fixups */
1120 pci_fixup_enable, /* pci_enable_device() time */
1121 pci_fixup_resume, /* pci_device_resume() */
1122 pci_fixup_suspend, /* pci_device_suspend */
1123 pci_fixup_resume_early, /* pci_device_resume_early() */
1126 /* Anonymous variables would be nice... */
1127 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook) \
1128 static const struct pci_fixup __pci_fixup_##name __used \
1129 __attribute__((__section__(#section))) = { vendor, device, hook };
1130 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
1131 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1132 vendor##device##hook, vendor, device, hook)
1133 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
1134 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1135 vendor##device##hook, vendor, device, hook)
1136 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
1137 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1138 vendor##device##hook, vendor, device, hook)
1139 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
1140 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1141 vendor##device##hook, vendor, device, hook)
1142 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
1143 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1144 resume##vendor##device##hook, vendor, device, hook)
1145 #define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
1146 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1147 resume_early##vendor##device##hook, vendor, device, hook)
1148 #define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
1149 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1150 suspend##vendor##device##hook, vendor, device, hook)
1153 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
1155 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
1156 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
1157 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
1158 int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name);
1159 int pcim_iomap_regions_request_all(struct pci_dev *pdev, u16 mask,
1161 void pcim_iounmap_regions(struct pci_dev *pdev, u16 mask);
1163 extern int pci_pci_problems;
1164 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
1165 #define PCIPCI_TRITON 2
1166 #define PCIPCI_NATOMA 4
1167 #define PCIPCI_VIAETBF 8
1168 #define PCIPCI_VSFX 16
1169 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
1170 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
1172 extern unsigned long pci_cardbus_io_size;
1173 extern unsigned long pci_cardbus_mem_size;
1175 int pcibios_add_platform_entries(struct pci_dev *dev);
1176 void pcibios_disable_device(struct pci_dev *dev);
1177 int pcibios_set_pcie_reset_state(struct pci_dev *dev,
1178 enum pcie_reset_state state);
1180 #ifdef CONFIG_PCI_MMCONFIG
1181 extern void __init pci_mmcfg_early_init(void);
1182 extern void __init pci_mmcfg_late_init(void);
1184 static inline void pci_mmcfg_early_init(void) { }
1185 static inline void pci_mmcfg_late_init(void) { }
1188 int pci_ext_cfg_avail(struct pci_dev *dev);
1190 void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
1192 #endif /* __KERNEL__ */
1193 #endif /* LINUX_PCI_H */