4 * PCI defines and function prototypes
5 * Copyright 1994, Drew Eckhardt
6 * Copyright 1997--1999 Martin Mares <mj@ucw.cz>
8 * For more information, please consult the following manuals (look at
9 * http://www.pcisig.com/ for how to get them):
11 * PCI BIOS Specification
12 * PCI Local Bus Specification
13 * PCI to PCI Bridge Specification
14 * PCI System Design Guide
20 /* Include the pci register defines */
21 #include <linux/pci_regs.h>
24 * The PCI interface treats multi-function devices as independent
25 * devices. The slot/function address of each device is encoded
26 * in a single byte as follows:
31 #define PCI_DEVFN(slot, func) ((((slot) & 0x1f) << 3) | ((func) & 0x07))
32 #define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f)
33 #define PCI_FUNC(devfn) ((devfn) & 0x07)
35 /* Ioctls for /proc/bus/pci/X/Y nodes. */
36 #define PCIIOC_BASE ('P' << 24 | 'C' << 16 | 'I' << 8)
37 #define PCIIOC_CONTROLLER (PCIIOC_BASE | 0x00) /* Get controller for PCI device. */
38 #define PCIIOC_MMAP_IS_IO (PCIIOC_BASE | 0x01) /* Set mmap state to I/O space. */
39 #define PCIIOC_MMAP_IS_MEM (PCIIOC_BASE | 0x02) /* Set mmap state to MEM space. */
40 #define PCIIOC_WRITE_COMBINE (PCIIOC_BASE | 0x03) /* Enable/disable write-combining. */
44 #include <linux/mod_devicetable.h>
46 #include <linux/types.h>
47 #include <linux/ioport.h>
48 #include <linux/list.h>
49 #include <linux/compiler.h>
50 #include <linux/errno.h>
51 #include <asm/atomic.h>
52 #include <linux/device.h>
54 /* Include the ID list */
55 #include <linux/pci_ids.h>
57 /* File state for mmap()s on /proc/bus/pci/X/Y */
63 /* This defines the direction arg to the DMA mapping routines. */
64 #define PCI_DMA_BIDIRECTIONAL 0
65 #define PCI_DMA_TODEVICE 1
66 #define PCI_DMA_FROMDEVICE 2
67 #define PCI_DMA_NONE 3
69 #define DEVICE_COUNT_RESOURCE 12
71 typedef int __bitwise pci_power_t;
73 #define PCI_D0 ((pci_power_t __force) 0)
74 #define PCI_D1 ((pci_power_t __force) 1)
75 #define PCI_D2 ((pci_power_t __force) 2)
76 #define PCI_D3hot ((pci_power_t __force) 3)
77 #define PCI_D3cold ((pci_power_t __force) 4)
78 #define PCI_UNKNOWN ((pci_power_t __force) 5)
79 #define PCI_POWER_ERROR ((pci_power_t __force) -1)
81 /** The pci_channel state describes connectivity between the CPU and
82 * the pci device. If some PCI bus between here and the pci device
83 * has crashed or locked up, this info is reflected here.
85 typedef unsigned int __bitwise pci_channel_state_t;
87 enum pci_channel_state {
88 /* I/O channel is in normal state */
89 pci_channel_io_normal = (__force pci_channel_state_t) 1,
91 /* I/O to channel is blocked */
92 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
94 /* PCI card is dead */
95 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
98 typedef unsigned int __bitwise pcie_reset_state_t;
100 enum pcie_reset_state {
101 /* Reset is NOT asserted (Use to deassert reset) */
102 pcie_deassert_reset = (__force pcie_reset_state_t) 1,
104 /* Use #PERST to reset PCI-E device */
105 pcie_warm_reset = (__force pcie_reset_state_t) 2,
107 /* Use PCI-E Hot Reset to reset device */
108 pcie_hot_reset = (__force pcie_reset_state_t) 3
111 typedef unsigned short __bitwise pci_dev_flags_t;
113 /* INTX_DISABLE in PCI_COMMAND register disables MSI
116 PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) 1,
119 typedef unsigned short __bitwise pci_bus_flags_t;
121 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
122 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
125 struct pci_cap_saved_state {
126 struct hlist_node next;
131 struct pcie_link_state;
133 * The pci_dev structure is used to describe PCI devices.
136 struct list_head global_list; /* node in list of all PCI devices */
137 struct list_head bus_list; /* node in per-bus list */
138 struct pci_bus *bus; /* bus this device is on */
139 struct pci_bus *subordinate; /* bus this device bridges to */
141 void *sysdata; /* hook for sys-specific extension */
142 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
144 unsigned int devfn; /* encoded device & function index */
145 unsigned short vendor;
146 unsigned short device;
147 unsigned short subsystem_vendor;
148 unsigned short subsystem_device;
149 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
150 u8 revision; /* PCI revision, low byte of class word */
151 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
152 u8 pcie_type; /* PCI-E device/port type */
153 u8 rom_base_reg; /* which config register controls the ROM */
154 u8 pin; /* which interrupt pin this device uses */
156 struct pci_driver *driver; /* which driver has allocated this device */
157 u64 dma_mask; /* Mask of the bits of bus address this
158 device implements. Normally this is
159 0xffffffff. You only need to change
160 this if your device has broken DMA
161 or supports 64-bit transfers. */
163 pci_power_t current_state; /* Current operating state. In ACPI-speak,
164 this is D0-D3, D0 being fully functional,
167 #ifdef CONFIG_PCIEASPM
168 struct pcie_link_state *link_state; /* ASPM link state. */
171 pci_channel_state_t error_state; /* current connectivity state */
172 struct device dev; /* Generic device interface */
174 int cfg_size; /* Size of configuration space */
177 * Instead of touching interrupt line and base address registers
178 * directly, use the values stored here. They might be different!
181 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
183 /* These fields are used by common fixups */
184 unsigned int transparent:1; /* Transparent PCI bridge */
185 unsigned int multifunction:1;/* Part of multi-function device */
186 /* keep track of device state */
187 unsigned int is_busmaster:1; /* device is busmaster */
188 unsigned int no_msi:1; /* device may not use msi */
189 unsigned int no_d1d2:1; /* only allow d0 or d3 */
190 unsigned int block_ucfg_access:1; /* userspace config space access is blocked */
191 unsigned int broken_parity_status:1; /* Device generates false positive parity */
192 unsigned int msi_enabled:1;
193 unsigned int msix_enabled:1;
194 unsigned int is_managed:1;
195 unsigned int is_pcie:1;
196 pci_dev_flags_t dev_flags;
197 atomic_t enable_cnt; /* pci_enable_device has been called */
199 u32 saved_config_space[16]; /* config space saved at suspend time */
200 struct hlist_head saved_cap_space;
201 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
202 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
203 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
204 #ifdef CONFIG_PCI_MSI
205 struct list_head msi_list;
209 extern struct pci_dev *alloc_pci_dev(void);
211 #define pci_dev_g(n) list_entry(n, struct pci_dev, global_list)
212 #define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
213 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
214 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
216 static inline int pci_channel_offline(struct pci_dev *pdev)
218 return (pdev->error_state != pci_channel_io_normal);
221 static inline struct pci_cap_saved_state *pci_find_saved_cap(
222 struct pci_dev *pci_dev, char cap)
224 struct pci_cap_saved_state *tmp;
225 struct hlist_node *pos;
227 hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) {
228 if (tmp->cap_nr == cap)
234 static inline void pci_add_saved_cap(struct pci_dev *pci_dev,
235 struct pci_cap_saved_state *new_cap)
237 hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space);
241 * For PCI devices, the region numbers are assigned this way:
243 * 0-5 standard PCI regions
245 * 7-10 bridges: address space assigned to buses behind the bridge
248 #define PCI_ROM_RESOURCE 6
249 #define PCI_BRIDGE_RESOURCES 7
250 #define PCI_NUM_RESOURCES 11
252 #ifndef PCI_BUS_NUM_RESOURCES
253 #define PCI_BUS_NUM_RESOURCES 8
256 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
259 struct list_head node; /* node in list of buses */
260 struct pci_bus *parent; /* parent bus this bridge is on */
261 struct list_head children; /* list of child buses */
262 struct list_head devices; /* list of devices on this bus */
263 struct pci_dev *self; /* bridge device as seen by parent */
264 struct resource *resource[PCI_BUS_NUM_RESOURCES];
265 /* address space routed to this bus */
267 struct pci_ops *ops; /* configuration access functions */
268 void *sysdata; /* hook for sys-specific extension */
269 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
271 unsigned char number; /* bus number */
272 unsigned char primary; /* number of primary bridge */
273 unsigned char secondary; /* number of secondary bridge */
274 unsigned char subordinate; /* max number of subordinate buses */
278 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
279 pci_bus_flags_t bus_flags; /* Inherited by child busses */
280 struct device *bridge;
282 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
283 struct bin_attribute *legacy_mem; /* legacy mem */
286 #define pci_bus_b(n) list_entry(n, struct pci_bus, node)
287 #define to_pci_bus(n) container_of(n, struct pci_bus, dev)
290 * Error values that may be returned by PCI functions.
292 #define PCIBIOS_SUCCESSFUL 0x00
293 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
294 #define PCIBIOS_BAD_VENDOR_ID 0x83
295 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
296 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
297 #define PCIBIOS_SET_FAILED 0x88
298 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
300 /* Low-level architecture-dependent routines */
303 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
304 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
308 int (*read)(unsigned int domain, unsigned int bus, unsigned int devfn,
309 int reg, int len, u32 *val);
310 int (*write)(unsigned int domain, unsigned int bus, unsigned int devfn,
311 int reg, int len, u32 val);
314 extern struct pci_raw_ops *raw_pci_ops;
316 struct pci_bus_region {
317 resource_size_t start;
322 spinlock_t lock; /* protects list, index */
323 struct list_head list; /* for IDs added at runtime */
324 unsigned int use_driver_data:1; /* pci_driver->driver_data is used */
327 /* ---------------------------------------------------------------- */
328 /** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
329 * a set of callbacks in struct pci_error_handlers, then that device driver
330 * will be notified of PCI bus errors, and will be driven to recovery
331 * when an error occurs.
334 typedef unsigned int __bitwise pci_ers_result_t;
336 enum pci_ers_result {
337 /* no result/none/not supported in device driver */
338 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
340 /* Device driver can recover without slot reset */
341 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
343 /* Device driver wants slot to be reset. */
344 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
346 /* Device has completely failed, is unrecoverable */
347 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
349 /* Device driver is fully recovered and operational */
350 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
353 /* PCI bus error event callbacks */
354 struct pci_error_handlers {
355 /* PCI bus error detected on this device */
356 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
357 enum pci_channel_state error);
359 /* MMIO has been re-enabled, but not DMA */
360 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
362 /* PCI Express link has been reset */
363 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
365 /* PCI slot has been reset */
366 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
368 /* Device driver may resume normal operations */
369 void (*resume)(struct pci_dev *dev);
372 /* ---------------------------------------------------------------- */
376 struct list_head node;
378 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
379 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
380 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
381 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
382 int (*suspend_late) (struct pci_dev *dev, pm_message_t state);
383 int (*resume_early) (struct pci_dev *dev);
384 int (*resume) (struct pci_dev *dev); /* Device woken up */
385 void (*shutdown) (struct pci_dev *dev);
387 struct pci_error_handlers *err_handler;
388 struct device_driver driver;
389 struct pci_dynids dynids;
392 #define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
395 * PCI_DEVICE - macro used to describe a specific pci device
396 * @vend: the 16 bit PCI Vendor ID
397 * @dev: the 16 bit PCI Device ID
399 * This macro is used to create a struct pci_device_id that matches a
400 * specific device. The subvendor and subdevice fields will be set to
403 #define PCI_DEVICE(vend,dev) \
404 .vendor = (vend), .device = (dev), \
405 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
408 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
409 * @dev_class: the class, subclass, prog-if triple for this device
410 * @dev_class_mask: the class mask for this device
412 * This macro is used to create a struct pci_device_id that matches a
413 * specific PCI class. The vendor, device, subvendor, and subdevice
414 * fields will be set to PCI_ANY_ID.
416 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
417 .class = (dev_class), .class_mask = (dev_class_mask), \
418 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
419 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
422 * PCI_VDEVICE - macro used to describe a specific pci device in short form
423 * @vend: the vendor name
424 * @dev: the 16 bit PCI Device ID
426 * This macro is used to create a struct pci_device_id that matches a
427 * specific PCI device. The subvendor, and subdevice fields will be set
428 * to PCI_ANY_ID. The macro allows the next field to follow as the device
432 #define PCI_VDEVICE(vendor, device) \
433 PCI_VENDOR_ID_##vendor, (device), \
434 PCI_ANY_ID, PCI_ANY_ID, 0, 0
436 /* these external functions are only available when PCI support is enabled */
439 extern struct bus_type pci_bus_type;
441 /* Do NOT directly access these two variables, unless you are arch specific pci
442 * code, or pci core code. */
443 extern struct list_head pci_root_buses; /* list of all known PCI buses */
444 extern struct list_head pci_devices; /* list of all devices */
445 /* Some device drivers need know if pci is initiated */
446 extern int no_pci_devices(void);
448 void pcibios_fixup_bus(struct pci_bus *);
449 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
450 char *pcibios_setup(char *str);
452 /* Used only when drivers/pci/setup.c is used */
453 void pcibios_align_resource(void *, struct resource *, resource_size_t,
455 void pcibios_update_irq(struct pci_dev *, int irq);
457 /* Generic PCI functions used internally */
459 extern struct pci_bus *pci_find_bus(int domain, int busnr);
460 void pci_bus_add_devices(struct pci_bus *bus);
461 struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
462 struct pci_ops *ops, void *sysdata);
463 static inline struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops,
466 struct pci_bus *root_bus;
467 root_bus = pci_scan_bus_parented(NULL, bus, ops, sysdata);
469 pci_bus_add_devices(root_bus);
472 struct pci_bus *pci_create_bus(struct device *parent, int bus,
473 struct pci_ops *ops, void *sysdata);
474 struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
476 int pci_scan_slot(struct pci_bus *bus, int devfn);
477 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
478 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
479 unsigned int pci_scan_child_bus(struct pci_bus *bus);
480 int __must_check pci_bus_add_device(struct pci_dev *dev);
481 void pci_read_bridge_bases(struct pci_bus *child);
482 struct resource *pci_find_parent_resource(const struct pci_dev *dev,
483 struct resource *res);
484 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
485 extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
486 extern void pci_dev_put(struct pci_dev *dev);
487 extern void pci_remove_bus(struct pci_bus *b);
488 extern void pci_remove_bus_device(struct pci_dev *dev);
489 extern void pci_stop_bus_device(struct pci_dev *dev);
490 void pci_setup_cardbus(struct pci_bus *bus);
491 extern void pci_sort_breadthfirst(void);
493 /* Generic PCI functions exported to card drivers */
495 #ifdef CONFIG_PCI_LEGACY
496 struct pci_dev __deprecated *pci_find_device(unsigned int vendor,
498 const struct pci_dev *from);
499 struct pci_dev __deprecated *pci_find_slot(unsigned int bus,
501 #endif /* CONFIG_PCI_LEGACY */
503 int pci_find_capability(struct pci_dev *dev, int cap);
504 int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
505 int pci_find_ext_capability(struct pci_dev *dev, int cap);
506 int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
507 int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
508 void pcie_wait_pending_transaction(struct pci_dev *dev);
509 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
511 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
512 struct pci_dev *from);
513 struct pci_dev *pci_get_device_reverse(unsigned int vendor, unsigned int device,
514 struct pci_dev *from);
516 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
517 unsigned int ss_vendor, unsigned int ss_device,
518 struct pci_dev *from);
519 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
520 struct pci_dev *pci_get_bus_and_slot(unsigned int bus, unsigned int devfn);
521 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
522 int pci_dev_present(const struct pci_device_id *ids);
523 const struct pci_device_id *pci_find_present(const struct pci_device_id *ids);
525 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
527 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
528 int where, u16 *val);
529 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
530 int where, u32 *val);
531 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
533 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
535 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
538 static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val)
540 return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
542 static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val)
544 return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
546 static inline int pci_read_config_dword(struct pci_dev *dev, int where,
549 return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
551 static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val)
553 return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
555 static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val)
557 return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
559 static inline int pci_write_config_dword(struct pci_dev *dev, int where,
562 return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
565 int __must_check pci_enable_device(struct pci_dev *dev);
566 int __must_check pci_enable_device_io(struct pci_dev *dev);
567 int __must_check pci_enable_device_mem(struct pci_dev *dev);
568 int __must_check pci_reenable_device(struct pci_dev *);
569 int __must_check pcim_enable_device(struct pci_dev *pdev);
570 void pcim_pin_device(struct pci_dev *pdev);
572 static inline int pci_is_managed(struct pci_dev *pdev)
574 return pdev->is_managed;
577 void pci_disable_device(struct pci_dev *dev);
578 void pci_set_master(struct pci_dev *dev);
579 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
580 #define HAVE_PCI_SET_MWI
581 int __must_check pci_set_mwi(struct pci_dev *dev);
582 int pci_try_set_mwi(struct pci_dev *dev);
583 void pci_clear_mwi(struct pci_dev *dev);
584 void pci_intx(struct pci_dev *dev, int enable);
585 void pci_msi_off(struct pci_dev *dev);
586 int pci_set_dma_mask(struct pci_dev *dev, u64 mask);
587 int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask);
588 int pcix_get_max_mmrbc(struct pci_dev *dev);
589 int pcix_get_mmrbc(struct pci_dev *dev);
590 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
591 int pcie_get_readrq(struct pci_dev *dev);
592 int pcie_set_readrq(struct pci_dev *dev, int rq);
593 void pci_update_resource(struct pci_dev *dev, struct resource *res, int resno);
594 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
595 int __must_check pci_assign_resource_fixed(struct pci_dev *dev, int i);
596 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
598 /* ROM control related routines */
599 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
600 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
601 size_t pci_get_rom_size(void __iomem *rom, size_t size);
603 /* Power management related routines */
604 int pci_save_state(struct pci_dev *dev);
605 int pci_restore_state(struct pci_dev *dev);
606 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
607 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
608 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable);
610 /* Functions for PCI Hotplug drivers to use */
611 int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
613 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
614 void pci_bus_assign_resources(struct pci_bus *bus);
615 void pci_bus_size_bridges(struct pci_bus *bus);
616 int pci_claim_resource(struct pci_dev *, int);
617 void pci_assign_unassigned_resources(void);
618 void pdev_enable_device(struct pci_dev *);
619 void pdev_sort_resources(struct pci_dev *, struct resource_list *);
620 void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
621 int (*)(struct pci_dev *, u8, u8));
622 #define HAVE_PCI_REQ_REGIONS 2
623 int __must_check pci_request_regions(struct pci_dev *, const char *);
624 void pci_release_regions(struct pci_dev *);
625 int __must_check pci_request_region(struct pci_dev *, int, const char *);
626 void pci_release_region(struct pci_dev *, int);
627 int pci_request_selected_regions(struct pci_dev *, int, const char *);
628 void pci_release_selected_regions(struct pci_dev *, int);
630 /* drivers/pci/bus.c */
631 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
632 struct resource *res, resource_size_t size,
633 resource_size_t align, resource_size_t min,
634 unsigned int type_mask,
635 void (*alignf)(void *, struct resource *,
636 resource_size_t, resource_size_t),
638 void pci_enable_bridges(struct pci_bus *bus);
640 /* Proper probing supporting hot-pluggable devices */
641 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
642 const char *mod_name);
643 static inline int __must_check pci_register_driver(struct pci_driver *driver)
645 return __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME);
648 void pci_unregister_driver(struct pci_driver *dev);
649 void pci_remove_behind_bridge(struct pci_dev *dev);
650 struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
651 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
652 struct pci_dev *dev);
653 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
656 void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *),
658 int pci_cfg_space_size(struct pci_dev *dev);
659 unsigned char pci_bus_max_busnr(struct pci_bus *bus);
661 /* kmem_cache style wrapper around pci_alloc_consistent() */
663 #include <linux/dmapool.h>
665 #define pci_pool dma_pool
666 #define pci_pool_create(name, pdev, size, align, allocation) \
667 dma_pool_create(name, &pdev->dev, size, align, allocation)
668 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
669 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
670 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
672 enum pci_dma_burst_strategy {
673 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
674 strategy_parameter is N/A */
675 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
677 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
678 strategy_parameter byte boundaries */
682 u16 vector; /* kernel uses to write allocated vector */
683 u16 entry; /* driver uses to specify entry, OS writes */
687 #ifndef CONFIG_PCI_MSI
688 static inline int pci_enable_msi(struct pci_dev *dev)
693 static inline void pci_disable_msi(struct pci_dev *dev)
696 static inline int pci_enable_msix(struct pci_dev *dev,
697 struct msix_entry *entries, int nvec)
702 static inline void pci_disable_msix(struct pci_dev *dev)
705 static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev)
708 static inline void pci_restore_msi_state(struct pci_dev *dev)
711 extern int pci_enable_msi(struct pci_dev *dev);
712 extern void pci_disable_msi(struct pci_dev *dev);
713 extern int pci_enable_msix(struct pci_dev *dev,
714 struct msix_entry *entries, int nvec);
715 extern void pci_disable_msix(struct pci_dev *dev);
716 extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
717 extern void pci_restore_msi_state(struct pci_dev *dev);
721 /* The functions a driver should call */
722 int ht_create_irq(struct pci_dev *dev, int idx);
723 void ht_destroy_irq(unsigned int irq);
724 #endif /* CONFIG_HT_IRQ */
726 extern void pci_block_user_cfg_access(struct pci_dev *dev);
727 extern void pci_unblock_user_cfg_access(struct pci_dev *dev);
730 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
731 * a PCI domain is defined to be a set of PCI busses which share
732 * configuration space.
734 #ifdef CONFIG_PCI_DOMAINS
735 extern int pci_domains_supported;
737 enum { pci_domains_supported = 0 };
738 static inline int pci_domain_nr(struct pci_bus *bus)
743 static inline int pci_proc_domain(struct pci_bus *bus)
747 #endif /* CONFIG_PCI_DOMAINS */
749 #else /* CONFIG_PCI is not enabled */
752 * If the system does not have PCI, clearly these return errors. Define
753 * these as simple inline functions to avoid hair in drivers.
756 #define _PCI_NOP(o, s, t) \
757 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
759 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
761 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
762 _PCI_NOP(o, word, u16 x) \
763 _PCI_NOP(o, dword, u32 x)
764 _PCI_NOP_ALL(read, *)
767 static inline struct pci_dev *pci_find_device(unsigned int vendor,
769 const struct pci_dev *from)
774 static inline struct pci_dev *pci_find_slot(unsigned int bus,
780 static inline struct pci_dev *pci_get_device(unsigned int vendor,
782 struct pci_dev *from)
787 static inline struct pci_dev *pci_get_device_reverse(unsigned int vendor,
789 struct pci_dev *from)
794 static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
796 unsigned int ss_vendor,
797 unsigned int ss_device,
798 struct pci_dev *from)
803 static inline struct pci_dev *pci_get_class(unsigned int class,
804 struct pci_dev *from)
809 #define pci_dev_present(ids) (0)
810 #define no_pci_devices() (1)
811 #define pci_find_present(ids) (NULL)
812 #define pci_dev_put(dev) do { } while (0)
814 static inline void pci_set_master(struct pci_dev *dev)
817 static inline int pci_enable_device(struct pci_dev *dev)
822 static inline void pci_disable_device(struct pci_dev *dev)
825 static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
830 static inline int pci_assign_resource(struct pci_dev *dev, int i)
835 static inline int __pci_register_driver(struct pci_driver *drv,
836 struct module *owner)
841 static inline int pci_register_driver(struct pci_driver *drv)
846 static inline void pci_unregister_driver(struct pci_driver *drv)
849 static inline int pci_find_capability(struct pci_dev *dev, int cap)
854 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
860 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
865 static inline void pcie_wait_pending_transaction(struct pci_dev *dev)
868 /* Power management related routines */
869 static inline int pci_save_state(struct pci_dev *dev)
874 static inline int pci_restore_state(struct pci_dev *dev)
879 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
884 static inline pci_power_t pci_choose_state(struct pci_dev *dev,
890 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
896 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
901 static inline void pci_release_regions(struct pci_dev *dev)
904 #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
906 static inline void pci_block_user_cfg_access(struct pci_dev *dev)
909 static inline void pci_unblock_user_cfg_access(struct pci_dev *dev)
912 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
915 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
919 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
923 #endif /* CONFIG_PCI */
925 /* Include architecture-dependent settings and functions */
929 /* these helpers provide future and backwards compatibility
930 * for accessing popular PCI BAR info */
931 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
932 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
933 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
934 #define pci_resource_len(dev,bar) \
935 ((pci_resource_start((dev), (bar)) == 0 && \
936 pci_resource_end((dev), (bar)) == \
937 pci_resource_start((dev), (bar))) ? 0 : \
939 (pci_resource_end((dev), (bar)) - \
940 pci_resource_start((dev), (bar)) + 1))
942 /* Similar to the helpers above, these manipulate per-pci_dev
943 * driver-specific data. They are really just a wrapper around
944 * the generic device structure functions of these calls.
946 static inline void *pci_get_drvdata(struct pci_dev *pdev)
948 return dev_get_drvdata(&pdev->dev);
951 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
953 dev_set_drvdata(&pdev->dev, data);
956 /* If you want to know what to call your pci_dev, ask this function.
957 * Again, it's a wrapper around the generic device.
959 static inline char *pci_name(struct pci_dev *pdev)
961 return pdev->dev.bus_id;
965 /* Some archs don't want to expose struct resource to userland as-is
968 #ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
969 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
970 const struct resource *rsrc, resource_size_t *start,
971 resource_size_t *end)
973 *start = rsrc->start;
976 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
980 * The world is not perfect and supplies us with broken PCI devices.
981 * For at least a part of these bugs we need a work-around, so both
982 * generic (drivers/pci/quirks.c) and per-architecture code can define
983 * fixup hooks to be called for particular buggy devices.
987 u16 vendor, device; /* You can use PCI_ANY_ID here of course */
988 void (*hook)(struct pci_dev *dev);
991 enum pci_fixup_pass {
992 pci_fixup_early, /* Before probing BARs */
993 pci_fixup_header, /* After reading configuration header */
994 pci_fixup_final, /* Final phase of device fixups */
995 pci_fixup_enable, /* pci_enable_device() time */
996 pci_fixup_resume, /* pci_enable_device() time */
999 /* Anonymous variables would be nice... */
1000 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook) \
1001 static const struct pci_fixup __pci_fixup_##name __used \
1002 __attribute__((__section__(#section))) = { vendor, device, hook };
1003 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
1004 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1005 vendor##device##hook, vendor, device, hook)
1006 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
1007 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1008 vendor##device##hook, vendor, device, hook)
1009 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
1010 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1011 vendor##device##hook, vendor, device, hook)
1012 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
1013 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1014 vendor##device##hook, vendor, device, hook)
1015 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
1016 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1017 resume##vendor##device##hook, vendor, device, hook)
1020 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
1022 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
1023 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
1024 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
1025 int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name);
1026 void pcim_iounmap_regions(struct pci_dev *pdev, u16 mask);
1028 extern int pci_pci_problems;
1029 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
1030 #define PCIPCI_TRITON 2
1031 #define PCIPCI_NATOMA 4
1032 #define PCIPCI_VIAETBF 8
1033 #define PCIPCI_VSFX 16
1034 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
1035 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
1037 extern unsigned long pci_cardbus_io_size;
1038 extern unsigned long pci_cardbus_mem_size;
1040 extern int pcibios_add_platform_entries(struct pci_dev *dev);
1042 #endif /* __KERNEL__ */
1043 #endif /* LINUX_PCI_H */