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 typedef unsigned short __bitwise pci_bus_flags_t;
122 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
123 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
126 struct pci_cap_saved_state {
127 struct hlist_node next;
132 struct pcie_link_state;
136 * The pci_dev structure is used to describe PCI devices.
139 struct list_head bus_list; /* node in per-bus list */
140 struct pci_bus *bus; /* bus this device is on */
141 struct pci_bus *subordinate; /* bus this device bridges to */
143 void *sysdata; /* hook for sys-specific extension */
144 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
146 unsigned int devfn; /* encoded device & function index */
147 unsigned short vendor;
148 unsigned short device;
149 unsigned short subsystem_vendor;
150 unsigned short subsystem_device;
151 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
152 u8 revision; /* PCI revision, low byte of class word */
153 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
154 u8 pcie_type; /* PCI-E device/port type */
155 u8 rom_base_reg; /* which config register controls the ROM */
156 u8 pin; /* which interrupt pin this device uses */
158 struct pci_driver *driver; /* which driver has allocated this device */
159 u64 dma_mask; /* Mask of the bits of bus address this
160 device implements. Normally this is
161 0xffffffff. You only need to change
162 this if your device has broken DMA
163 or supports 64-bit transfers. */
165 struct device_dma_parameters dma_parms;
167 pci_power_t current_state; /* Current operating state. In ACPI-speak,
168 this is D0-D3, D0 being fully functional,
171 #ifdef CONFIG_PCIEASPM
172 struct pcie_link_state *link_state; /* ASPM link state. */
175 pci_channel_state_t error_state; /* current connectivity state */
176 struct device dev; /* Generic device interface */
178 int cfg_size; /* Size of configuration space */
181 * Instead of touching interrupt line and base address registers
182 * directly, use the values stored here. They might be different!
185 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
187 /* These fields are used by common fixups */
188 unsigned int transparent:1; /* Transparent PCI bridge */
189 unsigned int multifunction:1;/* Part of multi-function device */
190 /* keep track of device state */
191 unsigned int is_added:1;
192 unsigned int is_busmaster:1; /* device is busmaster */
193 unsigned int no_msi:1; /* device may not use msi */
194 unsigned int no_d1d2:1; /* only allow d0 or d3 */
195 unsigned int block_ucfg_access:1; /* userspace config space access is blocked */
196 unsigned int broken_parity_status:1; /* Device generates false positive parity */
197 unsigned int msi_enabled:1;
198 unsigned int msix_enabled:1;
199 unsigned int is_managed:1;
200 unsigned int is_pcie:1;
201 pci_dev_flags_t dev_flags;
202 atomic_t enable_cnt; /* pci_enable_device has been called */
204 u32 saved_config_space[16]; /* config space saved at suspend time */
205 struct hlist_head saved_cap_space;
206 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
207 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
208 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
209 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
210 #ifdef CONFIG_PCI_MSI
211 struct list_head msi_list;
216 extern struct pci_dev *alloc_pci_dev(void);
218 #define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
219 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
220 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
222 static inline int pci_channel_offline(struct pci_dev *pdev)
224 return (pdev->error_state != pci_channel_io_normal);
227 static inline struct pci_cap_saved_state *pci_find_saved_cap(
228 struct pci_dev *pci_dev, char cap)
230 struct pci_cap_saved_state *tmp;
231 struct hlist_node *pos;
233 hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) {
234 if (tmp->cap_nr == cap)
240 static inline void pci_add_saved_cap(struct pci_dev *pci_dev,
241 struct pci_cap_saved_state *new_cap)
243 hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space);
247 * For PCI devices, the region numbers are assigned this way:
249 * 0-5 standard PCI regions
251 * 7-10 bridges: address space assigned to buses behind the bridge
254 #define PCI_ROM_RESOURCE 6
255 #define PCI_BRIDGE_RESOURCES 7
256 #define PCI_NUM_RESOURCES 11
258 #ifndef PCI_BUS_NUM_RESOURCES
259 #define PCI_BUS_NUM_RESOURCES 16
262 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
265 struct list_head node; /* node in list of buses */
266 struct pci_bus *parent; /* parent bus this bridge is on */
267 struct list_head children; /* list of child buses */
268 struct list_head devices; /* list of devices on this bus */
269 struct pci_dev *self; /* bridge device as seen by parent */
270 struct resource *resource[PCI_BUS_NUM_RESOURCES];
271 /* address space routed to this bus */
273 struct pci_ops *ops; /* configuration access functions */
274 void *sysdata; /* hook for sys-specific extension */
275 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
277 unsigned char number; /* bus number */
278 unsigned char primary; /* number of primary bridge */
279 unsigned char secondary; /* number of secondary bridge */
280 unsigned char subordinate; /* max number of subordinate buses */
284 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
285 pci_bus_flags_t bus_flags; /* Inherited by child busses */
286 struct device *bridge;
288 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
289 struct bin_attribute *legacy_mem; /* legacy mem */
290 unsigned int is_added:1;
293 #define pci_bus_b(n) list_entry(n, struct pci_bus, node)
294 #define to_pci_bus(n) container_of(n, struct pci_bus, dev)
297 * Error values that may be returned by PCI functions.
299 #define PCIBIOS_SUCCESSFUL 0x00
300 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
301 #define PCIBIOS_BAD_VENDOR_ID 0x83
302 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
303 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
304 #define PCIBIOS_SET_FAILED 0x88
305 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
307 /* Low-level architecture-dependent routines */
310 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
311 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
315 * ACPI needs to be able to access PCI config space before we've done a
316 * PCI bus scan and created pci_bus structures.
318 extern int raw_pci_read(unsigned int domain, unsigned int bus,
319 unsigned int devfn, int reg, int len, u32 *val);
320 extern int raw_pci_write(unsigned int domain, unsigned int bus,
321 unsigned int devfn, int reg, int len, u32 val);
323 struct pci_bus_region {
324 resource_size_t start;
329 spinlock_t lock; /* protects list, index */
330 struct list_head list; /* for IDs added at runtime */
331 unsigned int use_driver_data:1; /* pci_driver->driver_data is used */
334 /* ---------------------------------------------------------------- */
335 /** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
336 * a set of callbacks in struct pci_error_handlers, then that device driver
337 * will be notified of PCI bus errors, and will be driven to recovery
338 * when an error occurs.
341 typedef unsigned int __bitwise pci_ers_result_t;
343 enum pci_ers_result {
344 /* no result/none/not supported in device driver */
345 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
347 /* Device driver can recover without slot reset */
348 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
350 /* Device driver wants slot to be reset. */
351 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
353 /* Device has completely failed, is unrecoverable */
354 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
356 /* Device driver is fully recovered and operational */
357 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
360 /* PCI bus error event callbacks */
361 struct pci_error_handlers {
362 /* PCI bus error detected on this device */
363 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
364 enum pci_channel_state error);
366 /* MMIO has been re-enabled, but not DMA */
367 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
369 /* PCI Express link has been reset */
370 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
372 /* PCI slot has been reset */
373 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
375 /* Device driver may resume normal operations */
376 void (*resume)(struct pci_dev *dev);
379 /* ---------------------------------------------------------------- */
383 struct list_head node;
385 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
386 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
387 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
388 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
389 int (*suspend_late) (struct pci_dev *dev, pm_message_t state);
390 int (*resume_early) (struct pci_dev *dev);
391 int (*resume) (struct pci_dev *dev); /* Device woken up */
392 void (*shutdown) (struct pci_dev *dev);
394 struct pci_error_handlers *err_handler;
395 struct device_driver driver;
396 struct pci_dynids dynids;
399 #define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
402 * DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table
403 * @_table: device table name
405 * This macro is used to create a struct pci_device_id array (a device table)
406 * in a generic manner.
408 #define DEFINE_PCI_DEVICE_TABLE(_table) \
409 const struct pci_device_id _table[] __devinitconst
412 * PCI_DEVICE - macro used to describe a specific pci device
413 * @vend: the 16 bit PCI Vendor ID
414 * @dev: the 16 bit PCI Device ID
416 * This macro is used to create a struct pci_device_id that matches a
417 * specific device. The subvendor and subdevice fields will be set to
420 #define PCI_DEVICE(vend,dev) \
421 .vendor = (vend), .device = (dev), \
422 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
425 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
426 * @dev_class: the class, subclass, prog-if triple for this device
427 * @dev_class_mask: the class mask for this device
429 * This macro is used to create a struct pci_device_id that matches a
430 * specific PCI class. The vendor, device, subvendor, and subdevice
431 * fields will be set to PCI_ANY_ID.
433 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
434 .class = (dev_class), .class_mask = (dev_class_mask), \
435 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
436 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
439 * PCI_VDEVICE - macro used to describe a specific pci device in short form
440 * @vend: the vendor name
441 * @dev: the 16 bit PCI Device ID
443 * This macro is used to create a struct pci_device_id that matches a
444 * specific PCI device. The subvendor, and subdevice fields will be set
445 * to PCI_ANY_ID. The macro allows the next field to follow as the device
449 #define PCI_VDEVICE(vendor, device) \
450 PCI_VENDOR_ID_##vendor, (device), \
451 PCI_ANY_ID, PCI_ANY_ID, 0, 0
453 /* these external functions are only available when PCI support is enabled */
456 extern struct bus_type pci_bus_type;
458 /* Do NOT directly access these two variables, unless you are arch specific pci
459 * code, or pci core code. */
460 extern struct list_head pci_root_buses; /* list of all known PCI buses */
461 /* Some device drivers need know if pci is initiated */
462 extern int no_pci_devices(void);
464 void pcibios_fixup_bus(struct pci_bus *);
465 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
466 char *pcibios_setup(char *str);
468 /* Used only when drivers/pci/setup.c is used */
469 void pcibios_align_resource(void *, struct resource *, resource_size_t,
471 void pcibios_update_irq(struct pci_dev *, int irq);
473 /* Generic PCI functions used internally */
475 extern struct pci_bus *pci_find_bus(int domain, int busnr);
476 void pci_bus_add_devices(struct pci_bus *bus);
477 struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
478 struct pci_ops *ops, void *sysdata);
479 static inline struct pci_bus * __devinit pci_scan_bus(int bus, struct pci_ops *ops,
482 struct pci_bus *root_bus;
483 root_bus = pci_scan_bus_parented(NULL, bus, ops, sysdata);
485 pci_bus_add_devices(root_bus);
488 struct pci_bus *pci_create_bus(struct device *parent, int bus,
489 struct pci_ops *ops, void *sysdata);
490 struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
492 int pci_scan_slot(struct pci_bus *bus, int devfn);
493 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
494 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
495 unsigned int pci_scan_child_bus(struct pci_bus *bus);
496 int __must_check pci_bus_add_device(struct pci_dev *dev);
497 void pci_read_bridge_bases(struct pci_bus *child);
498 struct resource *pci_find_parent_resource(const struct pci_dev *dev,
499 struct resource *res);
500 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
501 extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
502 extern void pci_dev_put(struct pci_dev *dev);
503 extern void pci_remove_bus(struct pci_bus *b);
504 extern void pci_remove_bus_device(struct pci_dev *dev);
505 extern void pci_stop_bus_device(struct pci_dev *dev);
506 void pci_setup_cardbus(struct pci_bus *bus);
507 extern void pci_sort_breadthfirst(void);
509 /* Generic PCI functions exported to card drivers */
511 #ifdef CONFIG_PCI_LEGACY
512 struct pci_dev __deprecated *pci_find_device(unsigned int vendor,
514 const struct pci_dev *from);
515 struct pci_dev __deprecated *pci_find_slot(unsigned int bus,
517 #endif /* CONFIG_PCI_LEGACY */
519 int pci_find_capability(struct pci_dev *dev, int cap);
520 int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
521 int pci_find_ext_capability(struct pci_dev *dev, int cap);
522 int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
523 int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
524 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
526 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
527 struct pci_dev *from);
528 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
529 unsigned int ss_vendor, unsigned int ss_device,
530 const struct pci_dev *from);
531 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
532 struct pci_dev *pci_get_bus_and_slot(unsigned int bus, unsigned int devfn);
533 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
534 int pci_dev_present(const struct pci_device_id *ids);
536 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
538 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
539 int where, u16 *val);
540 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
541 int where, u32 *val);
542 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
544 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
546 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
549 static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val)
551 return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
553 static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val)
555 return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
557 static inline int pci_read_config_dword(struct pci_dev *dev, int where,
560 return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
562 static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val)
564 return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
566 static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val)
568 return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
570 static inline int pci_write_config_dword(struct pci_dev *dev, int where,
573 return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
576 int __must_check pci_enable_device(struct pci_dev *dev);
577 int __must_check pci_enable_device_io(struct pci_dev *dev);
578 int __must_check pci_enable_device_mem(struct pci_dev *dev);
579 int __must_check pci_reenable_device(struct pci_dev *);
580 int __must_check pcim_enable_device(struct pci_dev *pdev);
581 void pcim_pin_device(struct pci_dev *pdev);
583 static inline int pci_is_managed(struct pci_dev *pdev)
585 return pdev->is_managed;
588 void pci_disable_device(struct pci_dev *dev);
589 void pci_set_master(struct pci_dev *dev);
590 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
591 #define HAVE_PCI_SET_MWI
592 int __must_check pci_set_mwi(struct pci_dev *dev);
593 int pci_try_set_mwi(struct pci_dev *dev);
594 void pci_clear_mwi(struct pci_dev *dev);
595 void pci_intx(struct pci_dev *dev, int enable);
596 void pci_msi_off(struct pci_dev *dev);
597 int pci_set_dma_mask(struct pci_dev *dev, u64 mask);
598 int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask);
599 int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size);
600 int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask);
601 int pcix_get_max_mmrbc(struct pci_dev *dev);
602 int pcix_get_mmrbc(struct pci_dev *dev);
603 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
604 int pcie_get_readrq(struct pci_dev *dev);
605 int pcie_set_readrq(struct pci_dev *dev, int rq);
606 void pci_update_resource(struct pci_dev *dev, struct resource *res, int resno);
607 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
608 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
610 /* ROM control related routines */
611 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
612 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
613 size_t pci_get_rom_size(void __iomem *rom, size_t size);
615 /* Power management related routines */
616 int pci_save_state(struct pci_dev *dev);
617 int pci_restore_state(struct pci_dev *dev);
618 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
619 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
620 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable);
622 /* Functions for PCI Hotplug drivers to use */
623 int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
625 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
626 void pci_bus_assign_resources(struct pci_bus *bus);
627 void pci_bus_size_bridges(struct pci_bus *bus);
628 int pci_claim_resource(struct pci_dev *, int);
629 void pci_assign_unassigned_resources(void);
630 void pdev_enable_device(struct pci_dev *);
631 void pdev_sort_resources(struct pci_dev *, struct resource_list *);
632 int pci_enable_resources(struct pci_dev *, int mask);
633 void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
634 int (*)(struct pci_dev *, u8, u8));
635 #define HAVE_PCI_REQ_REGIONS 2
636 int __must_check pci_request_regions(struct pci_dev *, const char *);
637 void pci_release_regions(struct pci_dev *);
638 int __must_check pci_request_region(struct pci_dev *, int, const char *);
639 void pci_release_region(struct pci_dev *, int);
640 int pci_request_selected_regions(struct pci_dev *, int, const char *);
641 void pci_release_selected_regions(struct pci_dev *, int);
643 /* drivers/pci/bus.c */
644 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
645 struct resource *res, resource_size_t size,
646 resource_size_t align, resource_size_t min,
647 unsigned int type_mask,
648 void (*alignf)(void *, struct resource *,
649 resource_size_t, resource_size_t),
651 void pci_enable_bridges(struct pci_bus *bus);
653 /* Proper probing supporting hot-pluggable devices */
654 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
655 const char *mod_name);
656 static inline int __must_check pci_register_driver(struct pci_driver *driver)
658 return __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME);
661 void pci_unregister_driver(struct pci_driver *dev);
662 void pci_remove_behind_bridge(struct pci_dev *dev);
663 struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
664 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
665 struct pci_dev *dev);
666 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
669 void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *),
671 int pci_cfg_space_size_ext(struct pci_dev *dev);
672 int pci_cfg_space_size(struct pci_dev *dev);
673 unsigned char pci_bus_max_busnr(struct pci_bus *bus);
675 /* kmem_cache style wrapper around pci_alloc_consistent() */
677 #include <linux/dmapool.h>
679 #define pci_pool dma_pool
680 #define pci_pool_create(name, pdev, size, align, allocation) \
681 dma_pool_create(name, &pdev->dev, size, align, allocation)
682 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
683 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
684 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
686 enum pci_dma_burst_strategy {
687 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
688 strategy_parameter is N/A */
689 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
691 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
692 strategy_parameter byte boundaries */
696 u16 vector; /* kernel uses to write allocated vector */
697 u16 entry; /* driver uses to specify entry, OS writes */
701 #ifndef CONFIG_PCI_MSI
702 static inline int pci_enable_msi(struct pci_dev *dev)
707 static inline void pci_msi_shutdown(struct pci_dev *dev)
709 static inline void pci_disable_msi(struct pci_dev *dev)
712 static inline int pci_enable_msix(struct pci_dev *dev,
713 struct msix_entry *entries, int nvec)
718 static inline void pci_msix_shutdown(struct pci_dev *dev)
720 static inline void pci_disable_msix(struct pci_dev *dev)
723 static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev)
726 static inline void pci_restore_msi_state(struct pci_dev *dev)
729 extern int pci_enable_msi(struct pci_dev *dev);
730 extern void pci_msi_shutdown(struct pci_dev *dev);
731 extern void pci_disable_msi(struct pci_dev *dev);
732 extern int pci_enable_msix(struct pci_dev *dev,
733 struct msix_entry *entries, int nvec);
734 extern void pci_msix_shutdown(struct pci_dev *dev);
735 extern void pci_disable_msix(struct pci_dev *dev);
736 extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
737 extern void pci_restore_msi_state(struct pci_dev *dev);
741 /* The functions a driver should call */
742 int ht_create_irq(struct pci_dev *dev, int idx);
743 void ht_destroy_irq(unsigned int irq);
744 #endif /* CONFIG_HT_IRQ */
746 extern void pci_block_user_cfg_access(struct pci_dev *dev);
747 extern void pci_unblock_user_cfg_access(struct pci_dev *dev);
750 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
751 * a PCI domain is defined to be a set of PCI busses which share
752 * configuration space.
754 #ifdef CONFIG_PCI_DOMAINS
755 extern int pci_domains_supported;
757 enum { pci_domains_supported = 0 };
758 static inline int pci_domain_nr(struct pci_bus *bus)
763 static inline int pci_proc_domain(struct pci_bus *bus)
767 #endif /* CONFIG_PCI_DOMAINS */
769 #else /* CONFIG_PCI is not enabled */
772 * If the system does not have PCI, clearly these return errors. Define
773 * these as simple inline functions to avoid hair in drivers.
776 #define _PCI_NOP(o, s, t) \
777 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
779 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
781 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
782 _PCI_NOP(o, word, u16 x) \
783 _PCI_NOP(o, dword, u32 x)
784 _PCI_NOP_ALL(read, *)
787 static inline struct pci_dev *pci_find_device(unsigned int vendor,
789 const struct pci_dev *from)
794 static inline struct pci_dev *pci_find_slot(unsigned int bus,
800 static inline struct pci_dev *pci_get_device(unsigned int vendor,
802 struct pci_dev *from)
807 static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
809 unsigned int ss_vendor,
810 unsigned int ss_device,
811 const struct pci_dev *from)
816 static inline struct pci_dev *pci_get_class(unsigned int class,
817 struct pci_dev *from)
822 #define pci_dev_present(ids) (0)
823 #define no_pci_devices() (1)
824 #define pci_dev_put(dev) do { } while (0)
826 static inline void pci_set_master(struct pci_dev *dev)
829 static inline int pci_enable_device(struct pci_dev *dev)
834 static inline void pci_disable_device(struct pci_dev *dev)
837 static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
842 static inline int pci_set_dma_max_seg_size(struct pci_dev *dev,
848 static inline int pci_set_dma_seg_boundary(struct pci_dev *dev,
854 static inline int pci_assign_resource(struct pci_dev *dev, int i)
859 static inline int __pci_register_driver(struct pci_driver *drv,
860 struct module *owner)
865 static inline int pci_register_driver(struct pci_driver *drv)
870 static inline void pci_unregister_driver(struct pci_driver *drv)
873 static inline int pci_find_capability(struct pci_dev *dev, int cap)
878 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
884 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
889 /* Power management related routines */
890 static inline int pci_save_state(struct pci_dev *dev)
895 static inline int pci_restore_state(struct pci_dev *dev)
900 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
905 static inline pci_power_t pci_choose_state(struct pci_dev *dev,
911 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
917 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
922 static inline void pci_release_regions(struct pci_dev *dev)
925 #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
927 static inline void pci_block_user_cfg_access(struct pci_dev *dev)
930 static inline void pci_unblock_user_cfg_access(struct pci_dev *dev)
933 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
936 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
940 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
944 #endif /* CONFIG_PCI */
946 /* Include architecture-dependent settings and functions */
950 /* these helpers provide future and backwards compatibility
951 * for accessing popular PCI BAR info */
952 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
953 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
954 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
955 #define pci_resource_len(dev,bar) \
956 ((pci_resource_start((dev), (bar)) == 0 && \
957 pci_resource_end((dev), (bar)) == \
958 pci_resource_start((dev), (bar))) ? 0 : \
960 (pci_resource_end((dev), (bar)) - \
961 pci_resource_start((dev), (bar)) + 1))
963 /* Similar to the helpers above, these manipulate per-pci_dev
964 * driver-specific data. They are really just a wrapper around
965 * the generic device structure functions of these calls.
967 static inline void *pci_get_drvdata(struct pci_dev *pdev)
969 return dev_get_drvdata(&pdev->dev);
972 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
974 dev_set_drvdata(&pdev->dev, data);
977 /* If you want to know what to call your pci_dev, ask this function.
978 * Again, it's a wrapper around the generic device.
980 static inline char *pci_name(struct pci_dev *pdev)
982 return pdev->dev.bus_id;
986 /* Some archs don't want to expose struct resource to userland as-is
989 #ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
990 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
991 const struct resource *rsrc, resource_size_t *start,
992 resource_size_t *end)
994 *start = rsrc->start;
997 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
1001 * The world is not perfect and supplies us with broken PCI devices.
1002 * For at least a part of these bugs we need a work-around, so both
1003 * generic (drivers/pci/quirks.c) and per-architecture code can define
1004 * fixup hooks to be called for particular buggy devices.
1008 u16 vendor, device; /* You can use PCI_ANY_ID here of course */
1009 void (*hook)(struct pci_dev *dev);
1012 enum pci_fixup_pass {
1013 pci_fixup_early, /* Before probing BARs */
1014 pci_fixup_header, /* After reading configuration header */
1015 pci_fixup_final, /* Final phase of device fixups */
1016 pci_fixup_enable, /* pci_enable_device() time */
1017 pci_fixup_resume, /* pci_enable_device() time */
1020 /* Anonymous variables would be nice... */
1021 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook) \
1022 static const struct pci_fixup __pci_fixup_##name __used \
1023 __attribute__((__section__(#section))) = { vendor, device, hook };
1024 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
1025 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1026 vendor##device##hook, vendor, device, hook)
1027 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
1028 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1029 vendor##device##hook, vendor, device, hook)
1030 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
1031 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1032 vendor##device##hook, vendor, device, hook)
1033 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
1034 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1035 vendor##device##hook, vendor, device, hook)
1036 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
1037 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1038 resume##vendor##device##hook, vendor, device, hook)
1041 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
1043 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
1044 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
1045 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
1046 int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name);
1047 int pcim_iomap_regions_request_all(struct pci_dev *pdev, u16 mask,
1049 void pcim_iounmap_regions(struct pci_dev *pdev, u16 mask);
1051 extern int pci_pci_problems;
1052 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
1053 #define PCIPCI_TRITON 2
1054 #define PCIPCI_NATOMA 4
1055 #define PCIPCI_VIAETBF 8
1056 #define PCIPCI_VSFX 16
1057 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
1058 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
1060 extern unsigned long pci_cardbus_io_size;
1061 extern unsigned long pci_cardbus_mem_size;
1063 extern int pcibios_add_platform_entries(struct pci_dev *dev);
1065 #ifdef CONFIG_PCI_MMCONFIG
1066 extern void __init pci_mmcfg_early_init(void);
1067 extern void __init pci_mmcfg_late_init(void);
1069 static inline void pci_mmcfg_early_init(void) { }
1070 static inline void pci_mmcfg_late_init(void) { }
1073 #endif /* __KERNEL__ */
1074 #endif /* LINUX_PCI_H */