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/init.h>
48 #include <linux/ioport.h>
49 #include <linux/list.h>
50 #include <linux/compiler.h>
51 #include <linux/errno.h>
52 #include <asm/atomic.h>
53 #include <linux/device.h>
55 /* Include the ID list */
56 #include <linux/pci_ids.h>
58 /* File state for mmap()s on /proc/bus/pci/X/Y */
64 /* This defines the direction arg to the DMA mapping routines. */
65 #define PCI_DMA_BIDIRECTIONAL 0
66 #define PCI_DMA_TODEVICE 1
67 #define PCI_DMA_FROMDEVICE 2
68 #define PCI_DMA_NONE 3
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_dev_flags_t;
114 /* INTX_DISABLE in PCI_COMMAND register disables MSI
117 PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) 1,
120 enum pci_irq_reroute_variant {
121 INTEL_IRQ_REROUTE_VARIANT = 1,
122 MAX_IRQ_REROUTE_VARIANTS = 3
125 typedef unsigned short __bitwise pci_bus_flags_t;
127 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
128 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
131 struct pci_cap_saved_state {
132 struct hlist_node next;
137 struct pcie_link_state;
141 * The pci_dev structure is used to describe PCI devices.
144 struct list_head bus_list; /* node in per-bus list */
145 struct pci_bus *bus; /* bus this device is on */
146 struct pci_bus *subordinate; /* bus this device bridges to */
148 void *sysdata; /* hook for sys-specific extension */
149 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
151 unsigned int devfn; /* encoded device & function index */
152 unsigned short vendor;
153 unsigned short device;
154 unsigned short subsystem_vendor;
155 unsigned short subsystem_device;
156 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
157 u8 revision; /* PCI revision, low byte of class word */
158 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
159 u8 pcie_type; /* PCI-E device/port type */
160 u8 rom_base_reg; /* which config register controls the ROM */
161 u8 pin; /* which interrupt pin this device uses */
163 struct pci_driver *driver; /* which driver has allocated this device */
164 u64 dma_mask; /* Mask of the bits of bus address this
165 device implements. Normally this is
166 0xffffffff. You only need to change
167 this if your device has broken DMA
168 or supports 64-bit transfers. */
170 struct device_dma_parameters dma_parms;
172 pci_power_t current_state; /* Current operating state. In ACPI-speak,
173 this is D0-D3, D0 being fully functional,
176 #ifdef CONFIG_PCIEASPM
177 struct pcie_link_state *link_state; /* ASPM link state. */
180 pci_channel_state_t error_state; /* current connectivity state */
181 struct device dev; /* Generic device interface */
183 int cfg_size; /* Size of configuration space */
186 * Instead of touching interrupt line and base address registers
187 * directly, use the values stored here. They might be different!
190 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
192 /* These fields are used by common fixups */
193 unsigned int transparent:1; /* Transparent PCI bridge */
194 unsigned int multifunction:1;/* Part of multi-function device */
195 /* keep track of device state */
196 unsigned int is_added:1;
197 unsigned int is_busmaster:1; /* device is busmaster */
198 unsigned int no_msi:1; /* device may not use msi */
199 unsigned int no_d1d2:1; /* only allow d0 or d3 */
200 unsigned int block_ucfg_access:1; /* userspace config space access is blocked */
201 unsigned int broken_parity_status:1; /* Device generates false positive parity */
202 unsigned int irq_reroute_variant:2; /* device needs IRQ rerouting variant */
203 unsigned int msi_enabled:1;
204 unsigned int msix_enabled:1;
205 unsigned int is_managed:1;
206 unsigned int is_pcie:1;
207 pci_dev_flags_t dev_flags;
208 atomic_t enable_cnt; /* pci_enable_device has been called */
210 u32 saved_config_space[16]; /* config space saved at suspend time */
211 struct hlist_head saved_cap_space;
212 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
213 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
214 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
215 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
216 #ifdef CONFIG_PCI_MSI
217 struct list_head msi_list;
222 extern struct pci_dev *alloc_pci_dev(void);
224 #define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
225 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
226 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
228 static inline int pci_channel_offline(struct pci_dev *pdev)
230 return (pdev->error_state != pci_channel_io_normal);
233 static inline struct pci_cap_saved_state *pci_find_saved_cap(
234 struct pci_dev *pci_dev, char cap)
236 struct pci_cap_saved_state *tmp;
237 struct hlist_node *pos;
239 hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) {
240 if (tmp->cap_nr == cap)
246 static inline void pci_add_saved_cap(struct pci_dev *pci_dev,
247 struct pci_cap_saved_state *new_cap)
249 hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space);
253 * For PCI devices, the region numbers are assigned this way:
255 * 0-5 standard PCI regions
257 * 7-10 bridges: address space assigned to buses behind the bridge
260 #define PCI_ROM_RESOURCE 6
261 #define PCI_BRIDGE_RESOURCES 7
262 #define PCI_NUM_RESOURCES 11
264 #ifndef PCI_BUS_NUM_RESOURCES
265 #define PCI_BUS_NUM_RESOURCES 16
268 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
271 struct list_head node; /* node in list of buses */
272 struct pci_bus *parent; /* parent bus this bridge is on */
273 struct list_head children; /* list of child buses */
274 struct list_head devices; /* list of devices on this bus */
275 struct pci_dev *self; /* bridge device as seen by parent */
276 struct resource *resource[PCI_BUS_NUM_RESOURCES];
277 /* address space routed to this bus */
279 struct pci_ops *ops; /* configuration access functions */
280 void *sysdata; /* hook for sys-specific extension */
281 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
283 unsigned char number; /* bus number */
284 unsigned char primary; /* number of primary bridge */
285 unsigned char secondary; /* number of secondary bridge */
286 unsigned char subordinate; /* max number of subordinate buses */
290 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
291 pci_bus_flags_t bus_flags; /* Inherited by child busses */
292 struct device *bridge;
294 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
295 struct bin_attribute *legacy_mem; /* legacy mem */
296 unsigned int is_added:1;
299 #define pci_bus_b(n) list_entry(n, struct pci_bus, node)
300 #define to_pci_bus(n) container_of(n, struct pci_bus, dev)
303 * Error values that may be returned by PCI functions.
305 #define PCIBIOS_SUCCESSFUL 0x00
306 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
307 #define PCIBIOS_BAD_VENDOR_ID 0x83
308 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
309 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
310 #define PCIBIOS_SET_FAILED 0x88
311 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
313 /* Low-level architecture-dependent routines */
316 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
317 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
321 * ACPI needs to be able to access PCI config space before we've done a
322 * PCI bus scan and created pci_bus structures.
324 extern int raw_pci_read(unsigned int domain, unsigned int bus,
325 unsigned int devfn, int reg, int len, u32 *val);
326 extern int raw_pci_write(unsigned int domain, unsigned int bus,
327 unsigned int devfn, int reg, int len, u32 val);
329 struct pci_bus_region {
330 resource_size_t start;
335 spinlock_t lock; /* protects list, index */
336 struct list_head list; /* for IDs added at runtime */
337 unsigned int use_driver_data:1; /* pci_driver->driver_data is used */
340 /* ---------------------------------------------------------------- */
341 /** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
342 * a set of callbacks in struct pci_error_handlers, then that device driver
343 * will be notified of PCI bus errors, and will be driven to recovery
344 * when an error occurs.
347 typedef unsigned int __bitwise pci_ers_result_t;
349 enum pci_ers_result {
350 /* no result/none/not supported in device driver */
351 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
353 /* Device driver can recover without slot reset */
354 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
356 /* Device driver wants slot to be reset. */
357 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
359 /* Device has completely failed, is unrecoverable */
360 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
362 /* Device driver is fully recovered and operational */
363 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
366 /* PCI bus error event callbacks */
367 struct pci_error_handlers {
368 /* PCI bus error detected on this device */
369 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
370 enum pci_channel_state error);
372 /* MMIO has been re-enabled, but not DMA */
373 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
375 /* PCI Express link has been reset */
376 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
378 /* PCI slot has been reset */
379 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
381 /* Device driver may resume normal operations */
382 void (*resume)(struct pci_dev *dev);
385 /* ---------------------------------------------------------------- */
389 struct list_head node;
391 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
392 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
393 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
394 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
395 int (*suspend_late) (struct pci_dev *dev, pm_message_t state);
396 int (*resume_early) (struct pci_dev *dev);
397 int (*resume) (struct pci_dev *dev); /* Device woken up */
398 void (*shutdown) (struct pci_dev *dev);
400 struct pci_error_handlers *err_handler;
401 struct device_driver driver;
402 struct pci_dynids dynids;
405 #define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
408 * DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table
409 * @_table: device table name
411 * This macro is used to create a struct pci_device_id array (a device table)
412 * in a generic manner.
414 #define DEFINE_PCI_DEVICE_TABLE(_table) \
415 const struct pci_device_id _table[] __devinitconst
418 * PCI_DEVICE - macro used to describe a specific pci device
419 * @vend: the 16 bit PCI Vendor ID
420 * @dev: the 16 bit PCI Device ID
422 * This macro is used to create a struct pci_device_id that matches a
423 * specific device. The subvendor and subdevice fields will be set to
426 #define PCI_DEVICE(vend,dev) \
427 .vendor = (vend), .device = (dev), \
428 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
431 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
432 * @dev_class: the class, subclass, prog-if triple for this device
433 * @dev_class_mask: the class mask for this device
435 * This macro is used to create a struct pci_device_id that matches a
436 * specific PCI class. The vendor, device, subvendor, and subdevice
437 * fields will be set to PCI_ANY_ID.
439 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
440 .class = (dev_class), .class_mask = (dev_class_mask), \
441 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
442 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
445 * PCI_VDEVICE - macro used to describe a specific pci device in short form
446 * @vend: the vendor name
447 * @dev: the 16 bit PCI Device ID
449 * This macro is used to create a struct pci_device_id that matches a
450 * specific PCI device. The subvendor, and subdevice fields will be set
451 * to PCI_ANY_ID. The macro allows the next field to follow as the device
455 #define PCI_VDEVICE(vendor, device) \
456 PCI_VENDOR_ID_##vendor, (device), \
457 PCI_ANY_ID, PCI_ANY_ID, 0, 0
459 /* these external functions are only available when PCI support is enabled */
462 extern struct bus_type pci_bus_type;
464 /* Do NOT directly access these two variables, unless you are arch specific pci
465 * code, or pci core code. */
466 extern struct list_head pci_root_buses; /* list of all known PCI buses */
467 /* Some device drivers need know if pci is initiated */
468 extern int no_pci_devices(void);
470 void pcibios_fixup_bus(struct pci_bus *);
471 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
472 char *pcibios_setup(char *str);
474 /* Used only when drivers/pci/setup.c is used */
475 void pcibios_align_resource(void *, struct resource *, resource_size_t,
477 void pcibios_update_irq(struct pci_dev *, int irq);
479 /* Generic PCI functions used internally */
481 extern struct pci_bus *pci_find_bus(int domain, int busnr);
482 void pci_bus_add_devices(struct pci_bus *bus);
483 struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
484 struct pci_ops *ops, void *sysdata);
485 static inline struct pci_bus * __devinit pci_scan_bus(int bus, struct pci_ops *ops,
488 struct pci_bus *root_bus;
489 root_bus = pci_scan_bus_parented(NULL, bus, ops, sysdata);
491 pci_bus_add_devices(root_bus);
494 struct pci_bus *pci_create_bus(struct device *parent, int bus,
495 struct pci_ops *ops, void *sysdata);
496 struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
498 int pci_scan_slot(struct pci_bus *bus, int devfn);
499 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
500 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
501 unsigned int pci_scan_child_bus(struct pci_bus *bus);
502 int __must_check pci_bus_add_device(struct pci_dev *dev);
503 void pci_read_bridge_bases(struct pci_bus *child);
504 struct resource *pci_find_parent_resource(const struct pci_dev *dev,
505 struct resource *res);
506 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
507 extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
508 extern void pci_dev_put(struct pci_dev *dev);
509 extern void pci_remove_bus(struct pci_bus *b);
510 extern void pci_remove_bus_device(struct pci_dev *dev);
511 extern void pci_stop_bus_device(struct pci_dev *dev);
512 void pci_setup_cardbus(struct pci_bus *bus);
513 extern void pci_sort_breadthfirst(void);
515 /* Generic PCI functions exported to card drivers */
517 #ifdef CONFIG_PCI_LEGACY
518 struct pci_dev __deprecated *pci_find_device(unsigned int vendor,
520 const struct pci_dev *from);
521 struct pci_dev __deprecated *pci_find_slot(unsigned int bus,
523 #endif /* CONFIG_PCI_LEGACY */
525 int pci_find_capability(struct pci_dev *dev, int cap);
526 int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
527 int pci_find_ext_capability(struct pci_dev *dev, int cap);
528 int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
529 int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
530 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
532 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
533 struct pci_dev *from);
534 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
535 unsigned int ss_vendor, unsigned int ss_device,
536 const struct pci_dev *from);
537 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
538 struct pci_dev *pci_get_bus_and_slot(unsigned int bus, unsigned int devfn);
539 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
540 int pci_dev_present(const struct pci_device_id *ids);
542 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
544 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
545 int where, u16 *val);
546 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
547 int where, u32 *val);
548 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
550 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
552 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
555 static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val)
557 return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
559 static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val)
561 return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
563 static inline int pci_read_config_dword(struct pci_dev *dev, int where,
566 return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
568 static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val)
570 return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
572 static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val)
574 return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
576 static inline int pci_write_config_dword(struct pci_dev *dev, int where,
579 return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
582 int __must_check pci_enable_device(struct pci_dev *dev);
583 int __must_check pci_enable_device_io(struct pci_dev *dev);
584 int __must_check pci_enable_device_mem(struct pci_dev *dev);
585 int __must_check pci_reenable_device(struct pci_dev *);
586 int __must_check pcim_enable_device(struct pci_dev *pdev);
587 void pcim_pin_device(struct pci_dev *pdev);
589 static inline int pci_is_managed(struct pci_dev *pdev)
591 return pdev->is_managed;
594 void pci_disable_device(struct pci_dev *dev);
595 void pci_set_master(struct pci_dev *dev);
596 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
597 #define HAVE_PCI_SET_MWI
598 int __must_check pci_set_mwi(struct pci_dev *dev);
599 int pci_try_set_mwi(struct pci_dev *dev);
600 void pci_clear_mwi(struct pci_dev *dev);
601 void pci_intx(struct pci_dev *dev, int enable);
602 void pci_msi_off(struct pci_dev *dev);
603 int pci_set_dma_mask(struct pci_dev *dev, u64 mask);
604 int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask);
605 int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size);
606 int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask);
607 int pcix_get_max_mmrbc(struct pci_dev *dev);
608 int pcix_get_mmrbc(struct pci_dev *dev);
609 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
610 int pcie_get_readrq(struct pci_dev *dev);
611 int pcie_set_readrq(struct pci_dev *dev, int rq);
612 void pci_update_resource(struct pci_dev *dev, struct resource *res, int resno);
613 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
614 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
616 /* ROM control related routines */
617 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
618 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
619 size_t pci_get_rom_size(void __iomem *rom, size_t size);
621 /* Power management related routines */
622 int pci_save_state(struct pci_dev *dev);
623 int pci_restore_state(struct pci_dev *dev);
624 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
625 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
626 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable);
628 /* Functions for PCI Hotplug drivers to use */
629 int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
631 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
632 void pci_bus_assign_resources(struct pci_bus *bus);
633 void pci_bus_size_bridges(struct pci_bus *bus);
634 int pci_claim_resource(struct pci_dev *, int);
635 void pci_assign_unassigned_resources(void);
636 void pdev_enable_device(struct pci_dev *);
637 void pdev_sort_resources(struct pci_dev *, struct resource_list *);
638 int pci_enable_resources(struct pci_dev *, int mask);
639 void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
640 int (*)(struct pci_dev *, u8, u8));
641 #define HAVE_PCI_REQ_REGIONS 2
642 int __must_check pci_request_regions(struct pci_dev *, const char *);
643 void pci_release_regions(struct pci_dev *);
644 int __must_check pci_request_region(struct pci_dev *, int, const char *);
645 void pci_release_region(struct pci_dev *, int);
646 int pci_request_selected_regions(struct pci_dev *, int, const char *);
647 void pci_release_selected_regions(struct pci_dev *, int);
649 /* drivers/pci/bus.c */
650 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
651 struct resource *res, resource_size_t size,
652 resource_size_t align, resource_size_t min,
653 unsigned int type_mask,
654 void (*alignf)(void *, struct resource *,
655 resource_size_t, resource_size_t),
657 void pci_enable_bridges(struct pci_bus *bus);
659 /* Proper probing supporting hot-pluggable devices */
660 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
661 const char *mod_name);
662 static inline int __must_check pci_register_driver(struct pci_driver *driver)
664 return __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME);
667 void pci_unregister_driver(struct pci_driver *dev);
668 void pci_remove_behind_bridge(struct pci_dev *dev);
669 struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
670 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
671 struct pci_dev *dev);
672 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
675 void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *),
677 int pci_cfg_space_size_ext(struct pci_dev *dev);
678 int pci_cfg_space_size(struct pci_dev *dev);
679 unsigned char pci_bus_max_busnr(struct pci_bus *bus);
681 /* kmem_cache style wrapper around pci_alloc_consistent() */
683 #include <linux/dmapool.h>
685 #define pci_pool dma_pool
686 #define pci_pool_create(name, pdev, size, align, allocation) \
687 dma_pool_create(name, &pdev->dev, size, align, allocation)
688 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
689 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
690 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
692 enum pci_dma_burst_strategy {
693 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
694 strategy_parameter is N/A */
695 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
697 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
698 strategy_parameter byte boundaries */
702 u16 vector; /* kernel uses to write allocated vector */
703 u16 entry; /* driver uses to specify entry, OS writes */
707 #ifndef CONFIG_PCI_MSI
708 static inline int pci_enable_msi(struct pci_dev *dev)
713 static inline void pci_msi_shutdown(struct pci_dev *dev)
715 static inline void pci_disable_msi(struct pci_dev *dev)
718 static inline int pci_enable_msix(struct pci_dev *dev,
719 struct msix_entry *entries, int nvec)
724 static inline void pci_msix_shutdown(struct pci_dev *dev)
726 static inline void pci_disable_msix(struct pci_dev *dev)
729 static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev)
732 static inline void pci_restore_msi_state(struct pci_dev *dev)
735 extern int pci_enable_msi(struct pci_dev *dev);
736 extern void pci_msi_shutdown(struct pci_dev *dev);
737 extern void pci_disable_msi(struct pci_dev *dev);
738 extern int pci_enable_msix(struct pci_dev *dev,
739 struct msix_entry *entries, int nvec);
740 extern void pci_msix_shutdown(struct pci_dev *dev);
741 extern void pci_disable_msix(struct pci_dev *dev);
742 extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
743 extern void pci_restore_msi_state(struct pci_dev *dev);
747 /* The functions a driver should call */
748 int ht_create_irq(struct pci_dev *dev, int idx);
749 void ht_destroy_irq(unsigned int irq);
750 #endif /* CONFIG_HT_IRQ */
752 extern void pci_block_user_cfg_access(struct pci_dev *dev);
753 extern void pci_unblock_user_cfg_access(struct pci_dev *dev);
756 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
757 * a PCI domain is defined to be a set of PCI busses which share
758 * configuration space.
760 #ifdef CONFIG_PCI_DOMAINS
761 extern int pci_domains_supported;
763 enum { pci_domains_supported = 0 };
764 static inline int pci_domain_nr(struct pci_bus *bus)
769 static inline int pci_proc_domain(struct pci_bus *bus)
773 #endif /* CONFIG_PCI_DOMAINS */
775 #else /* CONFIG_PCI is not enabled */
778 * If the system does not have PCI, clearly these return errors. Define
779 * these as simple inline functions to avoid hair in drivers.
782 #define _PCI_NOP(o, s, t) \
783 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
785 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
787 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
788 _PCI_NOP(o, word, u16 x) \
789 _PCI_NOP(o, dword, u32 x)
790 _PCI_NOP_ALL(read, *)
793 static inline struct pci_dev *pci_find_device(unsigned int vendor,
795 const struct pci_dev *from)
800 static inline struct pci_dev *pci_find_slot(unsigned int bus,
806 static inline struct pci_dev *pci_get_device(unsigned int vendor,
808 struct pci_dev *from)
813 static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
815 unsigned int ss_vendor,
816 unsigned int ss_device,
817 const struct pci_dev *from)
822 static inline struct pci_dev *pci_get_class(unsigned int class,
823 struct pci_dev *from)
828 #define pci_dev_present(ids) (0)
829 #define no_pci_devices() (1)
830 #define pci_dev_put(dev) do { } while (0)
832 static inline void pci_set_master(struct pci_dev *dev)
835 static inline int pci_enable_device(struct pci_dev *dev)
840 static inline void pci_disable_device(struct pci_dev *dev)
843 static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
848 static inline int pci_set_dma_max_seg_size(struct pci_dev *dev,
854 static inline int pci_set_dma_seg_boundary(struct pci_dev *dev,
860 static inline int pci_assign_resource(struct pci_dev *dev, int i)
865 static inline int __pci_register_driver(struct pci_driver *drv,
866 struct module *owner)
871 static inline int pci_register_driver(struct pci_driver *drv)
876 static inline void pci_unregister_driver(struct pci_driver *drv)
879 static inline int pci_find_capability(struct pci_dev *dev, int cap)
884 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
890 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
895 /* Power management related routines */
896 static inline int pci_save_state(struct pci_dev *dev)
901 static inline int pci_restore_state(struct pci_dev *dev)
906 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
911 static inline pci_power_t pci_choose_state(struct pci_dev *dev,
917 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
923 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
928 static inline void pci_release_regions(struct pci_dev *dev)
931 #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
933 static inline void pci_block_user_cfg_access(struct pci_dev *dev)
936 static inline void pci_unblock_user_cfg_access(struct pci_dev *dev)
939 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
942 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
946 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
950 #endif /* CONFIG_PCI */
952 /* Include architecture-dependent settings and functions */
956 /* these helpers provide future and backwards compatibility
957 * for accessing popular PCI BAR info */
958 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
959 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
960 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
961 #define pci_resource_len(dev,bar) \
962 ((pci_resource_start((dev), (bar)) == 0 && \
963 pci_resource_end((dev), (bar)) == \
964 pci_resource_start((dev), (bar))) ? 0 : \
966 (pci_resource_end((dev), (bar)) - \
967 pci_resource_start((dev), (bar)) + 1))
969 /* Similar to the helpers above, these manipulate per-pci_dev
970 * driver-specific data. They are really just a wrapper around
971 * the generic device structure functions of these calls.
973 static inline void *pci_get_drvdata(struct pci_dev *pdev)
975 return dev_get_drvdata(&pdev->dev);
978 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
980 dev_set_drvdata(&pdev->dev, data);
983 /* If you want to know what to call your pci_dev, ask this function.
984 * Again, it's a wrapper around the generic device.
986 static inline char *pci_name(struct pci_dev *pdev)
988 return pdev->dev.bus_id;
992 /* Some archs don't want to expose struct resource to userland as-is
995 #ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
996 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
997 const struct resource *rsrc, resource_size_t *start,
998 resource_size_t *end)
1000 *start = rsrc->start;
1003 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
1007 * The world is not perfect and supplies us with broken PCI devices.
1008 * For at least a part of these bugs we need a work-around, so both
1009 * generic (drivers/pci/quirks.c) and per-architecture code can define
1010 * fixup hooks to be called for particular buggy devices.
1014 u16 vendor, device; /* You can use PCI_ANY_ID here of course */
1015 void (*hook)(struct pci_dev *dev);
1018 enum pci_fixup_pass {
1019 pci_fixup_early, /* Before probing BARs */
1020 pci_fixup_header, /* After reading configuration header */
1021 pci_fixup_final, /* Final phase of device fixups */
1022 pci_fixup_enable, /* pci_enable_device() time */
1023 pci_fixup_resume, /* pci_enable_device() time */
1026 /* Anonymous variables would be nice... */
1027 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook) \
1028 static const struct pci_fixup __pci_fixup_##name __used \
1029 __attribute__((__section__(#section))) = { vendor, device, hook };
1030 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
1031 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1032 vendor##device##hook, vendor, device, hook)
1033 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
1034 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1035 vendor##device##hook, vendor, device, hook)
1036 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
1037 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1038 vendor##device##hook, vendor, device, hook)
1039 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
1040 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1041 vendor##device##hook, vendor, device, hook)
1042 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
1043 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1044 resume##vendor##device##hook, vendor, device, hook)
1047 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
1049 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
1050 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
1051 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
1052 int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name);
1053 int pcim_iomap_regions_request_all(struct pci_dev *pdev, u16 mask,
1055 void pcim_iounmap_regions(struct pci_dev *pdev, u16 mask);
1057 extern int pci_pci_problems;
1058 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
1059 #define PCIPCI_TRITON 2
1060 #define PCIPCI_NATOMA 4
1061 #define PCIPCI_VIAETBF 8
1062 #define PCIPCI_VSFX 16
1063 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
1064 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
1066 extern unsigned long pci_cardbus_io_size;
1067 extern unsigned long pci_cardbus_mem_size;
1069 extern int pcibios_add_platform_entries(struct pci_dev *dev);
1071 #ifdef CONFIG_PCI_MMCONFIG
1072 extern void __init pci_mmcfg_early_init(void);
1073 extern void __init pci_mmcfg_late_init(void);
1075 static inline void pci_mmcfg_early_init(void) { }
1076 static inline void pci_mmcfg_late_init(void) { }
1079 #endif /* __KERNEL__ */
1080 #endif /* LINUX_PCI_H */