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powerpc: Use lwarx/ldarx hint in bit locks
[linux-2.6.git] / include / linux / pci.h
blobc1968f464c389fa5ad6529d1eaab7edf59400284
1 /*
2 * pci.h
3 *
4 * PCI defines and function prototypes
5 * Copyright 1994, Drew Eckhardt
6 * Copyright 1997--1999 Martin Mares <mj@ucw.cz>
7 *
8 * For more information, please consult the following manuals (look at
9 * http://www.pcisig.com/ for how to get them):
10 *
11 * PCI BIOS Specification
12 * PCI Local Bus Specification
13 * PCI to PCI Bridge Specification
14 * PCI System Design Guide
15 */
16
17 #ifndef LINUX_PCI_H
18 #define LINUX_PCI_H
19
20 #include <linux/pci_regs.h> /* The pci register defines */
21
22 /*
23 * The PCI interface treats multi-function devices as independent
24 * devices. The slot/function address of each device is encoded
25 * in a single byte as follows:
26 *
27 * 7:3 = slot
28 * 2:0 = function
29 */
30 #define PCI_DEVFN(slot, func) ((((slot) & 0x1f) << 3) | ((func) & 0x07))
31 #define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f)
32 #define PCI_FUNC(devfn) ((devfn) & 0x07)
33
34 /* Ioctls for /proc/bus/pci/X/Y nodes. */
35 #define PCIIOC_BASE ('P' << 24 | 'C' << 16 | 'I' << 8)
36 #define PCIIOC_CONTROLLER (PCIIOC_BASE | 0x00) /* Get controller for PCI device. */
37 #define PCIIOC_MMAP_IS_IO (PCIIOC_BASE | 0x01) /* Set mmap state to I/O space. */
38 #define PCIIOC_MMAP_IS_MEM (PCIIOC_BASE | 0x02) /* Set mmap state to MEM space. */
39 #define PCIIOC_WRITE_COMBINE (PCIIOC_BASE | 0x03) /* Enable/disable write-combining. */
40
41 #ifdef __KERNEL__
42
43 #include <linux/mod_devicetable.h>
44
45 #include <linux/types.h>
46 #include <linux/init.h>
47 #include <linux/ioport.h>
48 #include <linux/list.h>
49 #include <linux/compiler.h>
50 #include <linux/errno.h>
51 #include <linux/kobject.h>
52 #include <asm/atomic.h>
53 #include <linux/device.h>
54 #include <linux/io.h>
55 #include <linux/irqreturn.h>
56
57 /* Include the ID list */
58 #include <linux/pci_ids.h>
59
60 /* pci_slot represents a physical slot */
61 struct pci_slot {
62 struct pci_bus *bus; /* The bus this slot is on */
63 struct list_head list; /* node in list of slots on this bus */
64 struct hotplug_slot *hotplug; /* Hotplug info (migrate over time) */
65 unsigned char number; /* PCI_SLOT(pci_dev->devfn) */
66 struct kobject kobj;
67 };
68
69 static inline const char *pci_slot_name(const struct pci_slot *slot)
70 {
71 return kobject_name(&slot->kobj);
72 }
73
74 /* File state for mmap()s on /proc/bus/pci/X/Y */
75 enum pci_mmap_state {
76 pci_mmap_io,
77 pci_mmap_mem
78 };
79
80 /* This defines the direction arg to the DMA mapping routines. */
81 #define PCI_DMA_BIDIRECTIONAL 0
82 #define PCI_DMA_TODEVICE 1
83 #define PCI_DMA_FROMDEVICE 2
84 #define PCI_DMA_NONE 3
85
86 /*
87 * For PCI devices, the region numbers are assigned this way:
88 */
89 enum {
90 /* #0-5: standard PCI resources */
91 PCI_STD_RESOURCES,
92 PCI_STD_RESOURCE_END = 5,
93
94 /* #6: expansion ROM resource */
95 PCI_ROM_RESOURCE,
96
97 /* device specific resources */
98 #ifdef CONFIG_PCI_IOV
99 PCI_IOV_RESOURCES,
100 PCI_IOV_RESOURCE_END = PCI_IOV_RESOURCES + PCI_SRIOV_NUM_BARS - 1,
101 #endif
102
103 /* resources assigned to buses behind the bridge */
104 #define PCI_BRIDGE_RESOURCE_NUM 4
105
106 PCI_BRIDGE_RESOURCES,
107 PCI_BRIDGE_RESOURCE_END = PCI_BRIDGE_RESOURCES +
108 PCI_BRIDGE_RESOURCE_NUM - 1,
109
110 /* total resources associated with a PCI device */
111 PCI_NUM_RESOURCES,
112
113 /* preserve this for compatibility */
114 DEVICE_COUNT_RESOURCE
115 };
116
117 typedef int __bitwise pci_power_t;
118
119 #define PCI_D0 ((pci_power_t __force) 0)
120 #define PCI_D1 ((pci_power_t __force) 1)
121 #define PCI_D2 ((pci_power_t __force) 2)
122 #define PCI_D3hot ((pci_power_t __force) 3)
123 #define PCI_D3cold ((pci_power_t __force) 4)
124 #define PCI_UNKNOWN ((pci_power_t __force) 5)
125 #define PCI_POWER_ERROR ((pci_power_t __force) -1)
126
127 /* Remember to update this when the list above changes! */
128 extern const char *pci_power_names[];
129
130 static inline const char *pci_power_name(pci_power_t state)
131 {
132 return pci_power_names[1 + (int) state];
133 }
134
135 #define PCI_PM_D2_DELAY 200
136 #define PCI_PM_D3_WAIT 10
137 #define PCI_PM_BUS_WAIT 50
138
139 /** The pci_channel state describes connectivity between the CPU and
140 * the pci device. If some PCI bus between here and the pci device
141 * has crashed or locked up, this info is reflected here.
142 */
143 typedef unsigned int __bitwise pci_channel_state_t;
144
145 enum pci_channel_state {
146 /* I/O channel is in normal state */
147 pci_channel_io_normal = (__force pci_channel_state_t) 1,
148
149 /* I/O to channel is blocked */
150 pci_channel_io_frozen = (__force pci_channel_state_t) 2,
151
152 /* PCI card is dead */
153 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
154 };
155
156 typedef unsigned int __bitwise pcie_reset_state_t;
157
158 enum pcie_reset_state {
159 /* Reset is NOT asserted (Use to deassert reset) */
160 pcie_deassert_reset = (__force pcie_reset_state_t) 1,
161
162 /* Use #PERST to reset PCI-E device */
163 pcie_warm_reset = (__force pcie_reset_state_t) 2,
164
165 /* Use PCI-E Hot Reset to reset device */
166 pcie_hot_reset = (__force pcie_reset_state_t) 3
167 };
168
169 typedef unsigned short __bitwise pci_dev_flags_t;
170 enum pci_dev_flags {
171 /* INTX_DISABLE in PCI_COMMAND register disables MSI
172 * generation too.
173 */
174 PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) 1,
175 /* Device configuration is irrevocably lost if disabled into D3 */
176 PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) 2,
177 };
178
179 enum pci_irq_reroute_variant {
180 INTEL_IRQ_REROUTE_VARIANT = 1,
181 MAX_IRQ_REROUTE_VARIANTS = 3
182 };
183
184 typedef unsigned short __bitwise pci_bus_flags_t;
185 enum pci_bus_flags {
186 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
187 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
188 };
189
190 struct pci_cap_saved_state {
191 struct hlist_node next;
192 char cap_nr;
193 u32 data[0];
194 };
195
196 struct pcie_link_state;
197 struct pci_vpd;
198 struct pci_sriov;
199 struct pci_ats;
200
201 /*
202 * The pci_dev structure is used to describe PCI devices.
203 */
204 struct pci_dev {
205 struct list_head bus_list; /* node in per-bus list */
206 struct pci_bus *bus; /* bus this device is on */
207 struct pci_bus *subordinate; /* bus this device bridges to */
208
209 void *sysdata; /* hook for sys-specific extension */
210 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
211 struct pci_slot *slot; /* Physical slot this device is in */
212
213 unsigned int devfn; /* encoded device & function index */
214 unsigned short vendor;
215 unsigned short device;
216 unsigned short subsystem_vendor;
217 unsigned short subsystem_device;
218 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
219 u8 revision; /* PCI revision, low byte of class word */
220 u8 hdr_type; /* PCI header type (`multi' flag masked out) */
221 u8 pcie_cap; /* PCI-E capability offset */
222 u8 pcie_type; /* PCI-E device/port type */
223 u8 rom_base_reg; /* which config register controls the ROM */
224 u8 pin; /* which interrupt pin this device uses */
225
226 struct pci_driver *driver; /* which driver has allocated this device */
227 u64 dma_mask; /* Mask of the bits of bus address this
228 device implements. Normally this is
229 0xffffffff. You only need to change
230 this if your device has broken DMA
231 or supports 64-bit transfers. */
232
233 struct device_dma_parameters dma_parms;
234
235 pci_power_t current_state; /* Current operating state. In ACPI-speak,
236 this is D0-D3, D0 being fully functional,
237 and D3 being off. */
238 int pm_cap; /* PM capability offset in the
239 configuration space */
240 unsigned int pme_support:5; /* Bitmask of states from which PME#
241 can be generated */
242 unsigned int d1_support:1; /* Low power state D1 is supported */
243 unsigned int d2_support:1; /* Low power state D2 is supported */
244 unsigned int no_d1d2:1; /* Only allow D0 and D3 */
245 unsigned int wakeup_prepared:1;
246 unsigned int d3_delay; /* D3->D0 transition time in ms */
247
248 #ifdef CONFIG_PCIEASPM
249 struct pcie_link_state *link_state; /* ASPM link state. */
250 #endif
251
252 pci_channel_state_t error_state; /* current connectivity state */
253 struct device dev; /* Generic device interface */
254
255 int cfg_size; /* Size of configuration space */
256
257 /*
258 * Instead of touching interrupt line and base address registers
259 * directly, use the values stored here. They might be different!
260 */
261 unsigned int irq;
262 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
263
264 /* These fields are used by common fixups */
265 unsigned int transparent:1; /* Transparent PCI bridge */
266 unsigned int multifunction:1;/* Part of multi-function device */
267 /* keep track of device state */
268 unsigned int is_added:1;
269 unsigned int is_busmaster:1; /* device is busmaster */
270 unsigned int no_msi:1; /* device may not use msi */
271 unsigned int block_ucfg_access:1; /* userspace config space access is blocked */
272 unsigned int broken_parity_status:1; /* Device generates false positive parity */
273 unsigned int irq_reroute_variant:2; /* device needs IRQ rerouting variant */
274 unsigned int msi_enabled:1;
275 unsigned int msix_enabled:1;
276 unsigned int ari_enabled:1; /* ARI forwarding */
277 unsigned int is_managed:1;
278 unsigned int is_pcie:1;
279 unsigned int needs_freset:1; /* Dev requires fundamental reset */
280 unsigned int state_saved:1;
281 unsigned int is_physfn:1;
282 unsigned int is_virtfn:1;
283 unsigned int reset_fn:1;
284 unsigned int is_hotplug_bridge:1;
285 unsigned int aer_firmware_first:1;
286 pci_dev_flags_t dev_flags;
287 atomic_t enable_cnt; /* pci_enable_device has been called */
288
289 u32 saved_config_space[16]; /* config space saved at suspend time */
290 struct hlist_head saved_cap_space;
291 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
292 int rom_attr_enabled; /* has display of the rom attribute been enabled? */
293 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
294 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
295 #ifdef CONFIG_PCI_MSI
296 struct list_head msi_list;
297 #endif
298 struct pci_vpd *vpd;
299 #ifdef CONFIG_PCI_IOV
300 union {
301 struct pci_sriov *sriov; /* SR-IOV capability related */
302 struct pci_dev *physfn; /* the PF this VF is associated with */
303 };
304 struct pci_ats *ats; /* Address Translation Service */
305 #endif
306 };
307
308 extern struct pci_dev *alloc_pci_dev(void);
309
310 #define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
311 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
312 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
313
314 static inline int pci_channel_offline(struct pci_dev *pdev)
315 {
316 return (pdev->error_state != pci_channel_io_normal);
317 }
318
319 static inline struct pci_cap_saved_state *pci_find_saved_cap(
320 struct pci_dev *pci_dev, char cap)
321 {
322 struct pci_cap_saved_state *tmp;
323 struct hlist_node *pos;
324
325 hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) {
326 if (tmp->cap_nr == cap)
327 return tmp;
328 }
329 return NULL;
330 }
331
332 static inline void pci_add_saved_cap(struct pci_dev *pci_dev,
333 struct pci_cap_saved_state *new_cap)
334 {
335 hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space);
336 }
337
338 #ifndef PCI_BUS_NUM_RESOURCES
339 #define PCI_BUS_NUM_RESOURCES 16
340 #endif
341
342 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
343
344 struct pci_bus {
345 struct list_head node; /* node in list of buses */
346 struct pci_bus *parent; /* parent bus this bridge is on */
347 struct list_head children; /* list of child buses */
348 struct list_head devices; /* list of devices on this bus */
349 struct pci_dev *self; /* bridge device as seen by parent */
350 struct list_head slots; /* list of slots on this bus */
351 struct resource *resource[PCI_BUS_NUM_RESOURCES];
352 /* address space routed to this bus */
353
354 struct pci_ops *ops; /* configuration access functions */
355 void *sysdata; /* hook for sys-specific extension */
356 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
357
358 unsigned char number; /* bus number */
359 unsigned char primary; /* number of primary bridge */
360 unsigned char secondary; /* number of secondary bridge */
361 unsigned char subordinate; /* max number of subordinate buses */
362
363 char name[48];
364
365 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
366 pci_bus_flags_t bus_flags; /* Inherited by child busses */
367 struct device *bridge;
368 struct device dev;
369 struct bin_attribute *legacy_io; /* legacy I/O for this bus */
370 struct bin_attribute *legacy_mem; /* legacy mem */
371 unsigned int is_added:1;
372 };
373
374 #define pci_bus_b(n) list_entry(n, struct pci_bus, node)
375 #define to_pci_bus(n) container_of(n, struct pci_bus, dev)
376
377 /*
378 * Returns true if the pci bus is root (behind host-pci bridge),
379 * false otherwise
380 */
381 static inline bool pci_is_root_bus(struct pci_bus *pbus)
382 {
383 return !(pbus->parent);
384 }
385
386 #ifdef CONFIG_PCI_MSI
387 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
388 {
389 return pci_dev->msi_enabled || pci_dev->msix_enabled;
390 }
391 #else
392 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
393 #endif
394
395 /*
396 * Error values that may be returned by PCI functions.
397 */
398 #define PCIBIOS_SUCCESSFUL 0x00
399 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81
400 #define PCIBIOS_BAD_VENDOR_ID 0x83
401 #define PCIBIOS_DEVICE_NOT_FOUND 0x86
402 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87
403 #define PCIBIOS_SET_FAILED 0x88
404 #define PCIBIOS_BUFFER_TOO_SMALL 0x89
405
406 /* Low-level architecture-dependent routines */
407
408 struct pci_ops {
409 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
410 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
411 };
412
413 /*
414 * ACPI needs to be able to access PCI config space before we've done a
415 * PCI bus scan and created pci_bus structures.
416 */
417 extern int raw_pci_read(unsigned int domain, unsigned int bus,
418 unsigned int devfn, int reg, int len, u32 *val);
419 extern int raw_pci_write(unsigned int domain, unsigned int bus,
420 unsigned int devfn, int reg, int len, u32 val);
421
422 struct pci_bus_region {
423 resource_size_t start;
424 resource_size_t end;
425 };
426
427 struct pci_dynids {
428 spinlock_t lock; /* protects list, index */
429 struct list_head list; /* for IDs added at runtime */
430 };
431
432 /* ---------------------------------------------------------------- */
433 /** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
434 * a set of callbacks in struct pci_error_handlers, then that device driver
435 * will be notified of PCI bus errors, and will be driven to recovery
436 * when an error occurs.
437 */
438
439 typedef unsigned int __bitwise pci_ers_result_t;
440
441 enum pci_ers_result {
442 /* no result/none/not supported in device driver */
443 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,
444
445 /* Device driver can recover without slot reset */
446 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,
447
448 /* Device driver wants slot to be reset. */
449 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,
450
451 /* Device has completely failed, is unrecoverable */
452 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,
453
454 /* Device driver is fully recovered and operational */
455 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
456 };
457
458 /* PCI bus error event callbacks */
459 struct pci_error_handlers {
460 /* PCI bus error detected on this device */
461 pci_ers_result_t (*error_detected)(struct pci_dev *dev,
462 enum pci_channel_state error);
463
464 /* MMIO has been re-enabled, but not DMA */
465 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
466
467 /* PCI Express link has been reset */
468 pci_ers_result_t (*link_reset)(struct pci_dev *dev);
469
470 /* PCI slot has been reset */
471 pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
472
473 /* Device driver may resume normal operations */
474 void (*resume)(struct pci_dev *dev);
475 };
476
477 /* ---------------------------------------------------------------- */
478
479 struct module;
480 struct pci_driver {
481 struct list_head node;
482 char *name;
483 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */
484 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */
485 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */
486 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */
487 int (*suspend_late) (struct pci_dev *dev, pm_message_t state);
488 int (*resume_early) (struct pci_dev *dev);
489 int (*resume) (struct pci_dev *dev); /* Device woken up */
490 void (*shutdown) (struct pci_dev *dev);
491 struct pci_error_handlers *err_handler;
492 struct device_driver driver;
493 struct pci_dynids dynids;
494 };
495
496 #define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
497
498 /**
499 * DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table
500 * @_table: device table name
501 *
502 * This macro is used to create a struct pci_device_id array (a device table)
503 * in a generic manner.
504 */
505 #define DEFINE_PCI_DEVICE_TABLE(_table) \
506 const struct pci_device_id _table[] __devinitconst
507
508 /**
509 * PCI_DEVICE - macro used to describe a specific pci device
510 * @vend: the 16 bit PCI Vendor ID
511 * @dev: the 16 bit PCI Device ID
512 *
513 * This macro is used to create a struct pci_device_id that matches a
514 * specific device. The subvendor and subdevice fields will be set to
515 * PCI_ANY_ID.
516 */
517 #define PCI_DEVICE(vend,dev) \
518 .vendor = (vend), .device = (dev), \
519 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
520
521 /**
522 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
523 * @dev_class: the class, subclass, prog-if triple for this device
524 * @dev_class_mask: the class mask for this device
525 *
526 * This macro is used to create a struct pci_device_id that matches a
527 * specific PCI class. The vendor, device, subvendor, and subdevice
528 * fields will be set to PCI_ANY_ID.
529 */
530 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
531 .class = (dev_class), .class_mask = (dev_class_mask), \
532 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
533 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
534
535 /**
536 * PCI_VDEVICE - macro used to describe a specific pci device in short form
537 * @vendor: the vendor name
538 * @device: the 16 bit PCI Device ID
539 *
540 * This macro is used to create a struct pci_device_id that matches a
541 * specific PCI device. The subvendor, and subdevice fields will be set
542 * to PCI_ANY_ID. The macro allows the next field to follow as the device
543 * private data.
544 */
545
546 #define PCI_VDEVICE(vendor, device) \
547 PCI_VENDOR_ID_##vendor, (device), \
548 PCI_ANY_ID, PCI_ANY_ID, 0, 0
549
550 /* these external functions are only available when PCI support is enabled */
551 #ifdef CONFIG_PCI
552
553 extern struct bus_type pci_bus_type;
554
555 /* Do NOT directly access these two variables, unless you are arch specific pci
556 * code, or pci core code. */
557 extern struct list_head pci_root_buses; /* list of all known PCI buses */
558 /* Some device drivers need know if pci is initiated */
559 extern int no_pci_devices(void);
560
561 void pcibios_fixup_bus(struct pci_bus *);
562 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
563 char *pcibios_setup(char *str);
564
565 /* Used only when drivers/pci/setup.c is used */
566 void pcibios_align_resource(void *, struct resource *, resource_size_t,
567 resource_size_t);
568 void pcibios_update_irq(struct pci_dev *, int irq);
569
570 /* Weak but can be overriden by arch */
571 void pci_fixup_cardbus(struct pci_bus *);
572
573 /* Generic PCI functions used internally */
574
575 extern struct pci_bus *pci_find_bus(int domain, int busnr);
576 void pci_bus_add_devices(const struct pci_bus *bus);
577 struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
578 struct pci_ops *ops, void *sysdata);
579 static inline struct pci_bus * __devinit pci_scan_bus(int bus, struct pci_ops *ops,
580 void *sysdata)
581 {
582 struct pci_bus *root_bus;
583 root_bus = pci_scan_bus_parented(NULL, bus, ops, sysdata);
584 if (root_bus)
585 pci_bus_add_devices(root_bus);
586 return root_bus;
587 }
588 struct pci_bus *pci_create_bus(struct device *parent, int bus,
589 struct pci_ops *ops, void *sysdata);
590 struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
591 int busnr);
592 struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
593 const char *name,
594 struct hotplug_slot *hotplug);
595 void pci_destroy_slot(struct pci_slot *slot);
596 void pci_renumber_slot(struct pci_slot *slot, int slot_nr);
597 int pci_scan_slot(struct pci_bus *bus, int devfn);
598 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
599 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
600 unsigned int pci_scan_child_bus(struct pci_bus *bus);
601 int __must_check pci_bus_add_device(struct pci_dev *dev);
602 void pci_read_bridge_bases(struct pci_bus *child);
603 struct resource *pci_find_parent_resource(const struct pci_dev *dev,
604 struct resource *res);
605 u8 pci_swizzle_interrupt_pin(struct pci_dev *dev, u8 pin);
606 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
607 u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
608 extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
609 extern void pci_dev_put(struct pci_dev *dev);
610 extern void pci_remove_bus(struct pci_bus *b);
611 extern void pci_remove_bus_device(struct pci_dev *dev);
612 extern void pci_stop_bus_device(struct pci_dev *dev);
613 void pci_setup_cardbus(struct pci_bus *bus);
614 extern void pci_sort_breadthfirst(void);
615
616 /* Generic PCI functions exported to card drivers */
617
618 #ifdef CONFIG_PCI_LEGACY
619 struct pci_dev __deprecated *pci_find_device(unsigned int vendor,
620 unsigned int device,
621 struct pci_dev *from);
622 #endif /* CONFIG_PCI_LEGACY */
623
624 enum pci_lost_interrupt_reason {
625 PCI_LOST_IRQ_NO_INFORMATION = 0,
626 PCI_LOST_IRQ_DISABLE_MSI,
627 PCI_LOST_IRQ_DISABLE_MSIX,
628 PCI_LOST_IRQ_DISABLE_ACPI,
629 };
630 enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *dev);
631 int pci_find_capability(struct pci_dev *dev, int cap);
632 int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
633 int pci_find_ext_capability(struct pci_dev *dev, int cap);
634 int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
635 int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
636 struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
637
638 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
639 struct pci_dev *from);
640 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
641 unsigned int ss_vendor, unsigned int ss_device,
642 struct pci_dev *from);
643 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
644 struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
645 unsigned int devfn);
646 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
647 unsigned int devfn)
648 {
649 return pci_get_domain_bus_and_slot(0, bus, devfn);
650 }
651 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
652 int pci_dev_present(const struct pci_device_id *ids);
653
654 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
655 int where, u8 *val);
656 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
657 int where, u16 *val);
658 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
659 int where, u32 *val);
660 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
661 int where, u8 val);
662 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
663 int where, u16 val);
664 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
665 int where, u32 val);
666 struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
667
668 static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val)
669 {
670 return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
671 }
672 static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val)
673 {
674 return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
675 }
676 static inline int pci_read_config_dword(struct pci_dev *dev, int where,
677 u32 *val)
678 {
679 return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
680 }
681 static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val)
682 {
683 return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
684 }
685 static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val)
686 {
687 return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
688 }
689 static inline int pci_write_config_dword(struct pci_dev *dev, int where,
690 u32 val)
691 {
692 return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
693 }
694
695 int __must_check pci_enable_device(struct pci_dev *dev);
696 int __must_check pci_enable_device_io(struct pci_dev *dev);
697 int __must_check pci_enable_device_mem(struct pci_dev *dev);
698 int __must_check pci_reenable_device(struct pci_dev *);
699 int __must_check pcim_enable_device(struct pci_dev *pdev);
700 void pcim_pin_device(struct pci_dev *pdev);
701
702 static inline int pci_is_enabled(struct pci_dev *pdev)
703 {
704 return (atomic_read(&pdev->enable_cnt) > 0);
705 }
706
707 static inline int pci_is_managed(struct pci_dev *pdev)
708 {
709 return pdev->is_managed;
710 }
711
712 void pci_disable_device(struct pci_dev *dev);
713 void pci_set_master(struct pci_dev *dev);
714 void pci_clear_master(struct pci_dev *dev);
715 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
716 int pci_set_cacheline_size(struct pci_dev *dev);
717 #define HAVE_PCI_SET_MWI
718 int __must_check pci_set_mwi(struct pci_dev *dev);
719 int pci_try_set_mwi(struct pci_dev *dev);
720 void pci_clear_mwi(struct pci_dev *dev);
721 void pci_intx(struct pci_dev *dev, int enable);
722 void pci_msi_off(struct pci_dev *dev);
723 int pci_set_dma_mask(struct pci_dev *dev, u64 mask);
724 int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask);
725 int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size);
726 int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask);
727 int pcix_get_max_mmrbc(struct pci_dev *dev);
728 int pcix_get_mmrbc(struct pci_dev *dev);
729 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
730 int pcie_get_readrq(struct pci_dev *dev);
731 int pcie_set_readrq(struct pci_dev *dev, int rq);
732 int __pci_reset_function(struct pci_dev *dev);
733 int pci_reset_function(struct pci_dev *dev);
734 void pci_update_resource(struct pci_dev *dev, int resno);
735 int __must_check pci_assign_resource(struct pci_dev *dev, int i);
736 int pci_select_bars(struct pci_dev *dev, unsigned long flags);
737
738 /* ROM control related routines */
739 int pci_enable_rom(struct pci_dev *pdev);
740 void pci_disable_rom(struct pci_dev *pdev);
741 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
742 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
743 size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size);
744
745 /* Power management related routines */
746 int pci_save_state(struct pci_dev *dev);
747 int pci_restore_state(struct pci_dev *dev);
748 int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state);
749 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
750 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
751 bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
752 void pci_pme_active(struct pci_dev *dev, bool enable);
753 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable);
754 int pci_wake_from_d3(struct pci_dev *dev, bool enable);
755 pci_power_t pci_target_state(struct pci_dev *dev);
756 int pci_prepare_to_sleep(struct pci_dev *dev);
757 int pci_back_from_sleep(struct pci_dev *dev);
758
759 /* For use by arch with custom probe code */
760 void set_pcie_port_type(struct pci_dev *pdev);
761 void set_pcie_hotplug_bridge(struct pci_dev *pdev);
762
763 /* Functions for PCI Hotplug drivers to use */
764 int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
765 #ifdef CONFIG_HOTPLUG
766 unsigned int pci_rescan_bus(struct pci_bus *bus);
767 #endif
768
769 /* Vital product data routines */
770 ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
771 ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
772 int pci_vpd_truncate(struct pci_dev *dev, size_t size);
773
774 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
775 void pci_bus_assign_resources(const struct pci_bus *bus);
776 void pci_bus_size_bridges(struct pci_bus *bus);
777 int pci_claim_resource(struct pci_dev *, int);
778 void pci_assign_unassigned_resources(void);
779 void pdev_enable_device(struct pci_dev *);
780 void pdev_sort_resources(struct pci_dev *, struct resource_list *);
781 int pci_enable_resources(struct pci_dev *, int mask);
782 void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
783 int (*)(struct pci_dev *, u8, u8));
784 #define HAVE_PCI_REQ_REGIONS 2
785 int __must_check pci_request_regions(struct pci_dev *, const char *);
786 int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
787 void pci_release_regions(struct pci_dev *);
788 int __must_check pci_request_region(struct pci_dev *, int, const char *);
789 int __must_check pci_request_region_exclusive(struct pci_dev *, int, const char *);
790 void pci_release_region(struct pci_dev *, int);
791 int pci_request_selected_regions(struct pci_dev *, int, const char *);
792 int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
793 void pci_release_selected_regions(struct pci_dev *, int);
794
795 /* drivers/pci/bus.c */
796 int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
797 struct resource *res, resource_size_t size,
798 resource_size_t align, resource_size_t min,
799 unsigned int type_mask,
800 void (*alignf)(void *, struct resource *,
801 resource_size_t, resource_size_t),
802 void *alignf_data);
803 void pci_enable_bridges(struct pci_bus *bus);
804
805 /* Proper probing supporting hot-pluggable devices */
806 int __must_check __pci_register_driver(struct pci_driver *, struct module *,
807 const char *mod_name);
808
809 /*
810 * pci_register_driver must be a macro so that KBUILD_MODNAME can be expanded
811 */
812 #define pci_register_driver(driver) \
813 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
814
815 void pci_unregister_driver(struct pci_driver *dev);
816 void pci_remove_behind_bridge(struct pci_dev *dev);
817 struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
818 int pci_add_dynid(struct pci_driver *drv,
819 unsigned int vendor, unsigned int device,
820 unsigned int subvendor, unsigned int subdevice,
821 unsigned int class, unsigned int class_mask,
822 unsigned long driver_data);
823 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
824 struct pci_dev *dev);
825 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
826 int pass);
827
828 void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
829 void *userdata);
830 int pci_cfg_space_size_ext(struct pci_dev *dev);
831 int pci_cfg_space_size(struct pci_dev *dev);
832 unsigned char pci_bus_max_busnr(struct pci_bus *bus);
833
834 int pci_set_vga_state(struct pci_dev *pdev, bool decode,
835 unsigned int command_bits, bool change_bridge);
836 /* kmem_cache style wrapper around pci_alloc_consistent() */
837
838 #include <linux/dmapool.h>
839
840 #define pci_pool dma_pool
841 #define pci_pool_create(name, pdev, size, align, allocation) \
842 dma_pool_create(name, &pdev->dev, size, align, allocation)
843 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
844 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
845 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
846
847 enum pci_dma_burst_strategy {
848 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
849 strategy_parameter is N/A */
850 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
851 byte boundaries */
852 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
853 strategy_parameter byte boundaries */
854 };
855
856 struct msix_entry {
857 u32 vector; /* kernel uses to write allocated vector */
858 u16 entry; /* driver uses to specify entry, OS writes */
859 };
860
861
862 #ifndef CONFIG_PCI_MSI
863 static inline int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec)
864 {
865 return -1;
866 }
867
868 static inline void pci_msi_shutdown(struct pci_dev *dev)
869 { }
870 static inline void pci_disable_msi(struct pci_dev *dev)
871 { }
872
873 static inline int pci_msix_table_size(struct pci_dev *dev)
874 {
875 return 0;
876 }
877 static inline int pci_enable_msix(struct pci_dev *dev,
878 struct msix_entry *entries, int nvec)
879 {
880 return -1;
881 }
882
883 static inline void pci_msix_shutdown(struct pci_dev *dev)
884 { }
885 static inline void pci_disable_msix(struct pci_dev *dev)
886 { }
887
888 static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev)
889 { }
890
891 static inline void pci_restore_msi_state(struct pci_dev *dev)
892 { }
893 static inline int pci_msi_enabled(void)
894 {
895 return 0;
896 }
897 #else
898 extern int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec);
899 extern void pci_msi_shutdown(struct pci_dev *dev);
900 extern void pci_disable_msi(struct pci_dev *dev);
901 extern int pci_msix_table_size(struct pci_dev *dev);
902 extern int pci_enable_msix(struct pci_dev *dev,
903 struct msix_entry *entries, int nvec);
904 extern void pci_msix_shutdown(struct pci_dev *dev);
905 extern void pci_disable_msix(struct pci_dev *dev);
906 extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
907 extern void pci_restore_msi_state(struct pci_dev *dev);
908 extern int pci_msi_enabled(void);
909 #endif
910
911 #ifndef CONFIG_PCIEASPM
912 static inline int pcie_aspm_enabled(void)
913 {
914 return 0;
915 }
916 #else
917 extern int pcie_aspm_enabled(void);
918 #endif
919
920 #ifndef CONFIG_PCIE_ECRC
921 static inline void pcie_set_ecrc_checking(struct pci_dev *dev)
922 {
923 return;
924 }
925 static inline void pcie_ecrc_get_policy(char *str) {};
926 #else
927 extern void pcie_set_ecrc_checking(struct pci_dev *dev);
928 extern void pcie_ecrc_get_policy(char *str);
929 #endif
930
931 #define pci_enable_msi(pdev) pci_enable_msi_block(pdev, 1)
932
933 #ifdef CONFIG_HT_IRQ
934 /* The functions a driver should call */
935 int ht_create_irq(struct pci_dev *dev, int idx);
936 void ht_destroy_irq(unsigned int irq);
937 #endif /* CONFIG_HT_IRQ */
938
939 extern void pci_block_user_cfg_access(struct pci_dev *dev);
940 extern void pci_unblock_user_cfg_access(struct pci_dev *dev);
941
942 /*
943 * PCI domain support. Sometimes called PCI segment (eg by ACPI),
944 * a PCI domain is defined to be a set of PCI busses which share
945 * configuration space.
946 */
947 #ifdef CONFIG_PCI_DOMAINS
948 extern int pci_domains_supported;
949 #else
950 enum { pci_domains_supported = 0 };
951 static inline int pci_domain_nr(struct pci_bus *bus)
952 {
953 return 0;
954 }
955
956 static inline int pci_proc_domain(struct pci_bus *bus)
957 {
958 return 0;
959 }
960 #endif /* CONFIG_PCI_DOMAINS */
961
962 #else /* CONFIG_PCI is not enabled */
963
964 /*
965 * If the system does not have PCI, clearly these return errors. Define
966 * these as simple inline functions to avoid hair in drivers.
967 */
968
969 #define _PCI_NOP(o, s, t) \
970 static inline int pci_##o##_config_##s(struct pci_dev *dev, \
971 int where, t val) \
972 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
973
974 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
975 _PCI_NOP(o, word, u16 x) \
976 _PCI_NOP(o, dword, u32 x)
977 _PCI_NOP_ALL(read, *)
978 _PCI_NOP_ALL(write,)
979
980 static inline struct pci_dev *pci_find_device(unsigned int vendor,
981 unsigned int device,
982 struct pci_dev *from)
983 {
984 return NULL;
985 }
986
987 static inline struct pci_dev *pci_get_device(unsigned int vendor,
988 unsigned int device,
989 struct pci_dev *from)
990 {
991 return NULL;
992 }
993
994 static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
995 unsigned int device,
996 unsigned int ss_vendor,
997 unsigned int ss_device,
998 struct pci_dev *from)
999 {
1000 return NULL;
1001 }
1002
1003 static inline struct pci_dev *pci_get_class(unsigned int class,
1004 struct pci_dev *from)
1005 {
1006 return NULL;
1007 }
1008
1009 #define pci_dev_present(ids) (0)
1010 #define no_pci_devices() (1)
1011 #define pci_dev_put(dev) do { } while (0)
1012
1013 static inline void pci_set_master(struct pci_dev *dev)
1014 { }
1015
1016 static inline int pci_enable_device(struct pci_dev *dev)
1017 {
1018 return -EIO;
1019 }
1020
1021 static inline void pci_disable_device(struct pci_dev *dev)
1022 { }
1023
1024 static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
1025 {
1026 return -EIO;
1027 }
1028
1029 static inline int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
1030 {
1031 return -EIO;
1032 }
1033
1034 static inline int pci_set_dma_max_seg_size(struct pci_dev *dev,
1035 unsigned int size)
1036 {
1037 return -EIO;
1038 }
1039
1040 static inline int pci_set_dma_seg_boundary(struct pci_dev *dev,
1041 unsigned long mask)
1042 {
1043 return -EIO;
1044 }
1045
1046 static inline int pci_assign_resource(struct pci_dev *dev, int i)
1047 {
1048 return -EBUSY;
1049 }
1050
1051 static inline int __pci_register_driver(struct pci_driver *drv,
1052 struct module *owner)
1053 {
1054 return 0;
1055 }
1056
1057 static inline int pci_register_driver(struct pci_driver *drv)
1058 {
1059 return 0;
1060 }
1061
1062 static inline void pci_unregister_driver(struct pci_driver *drv)
1063 { }
1064
1065 static inline int pci_find_capability(struct pci_dev *dev, int cap)
1066 {
1067 return 0;
1068 }
1069
1070 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
1071 int cap)
1072 {
1073 return 0;
1074 }
1075
1076 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
1077 {
1078 return 0;
1079 }
1080
1081 /* Power management related routines */
1082 static inline int pci_save_state(struct pci_dev *dev)
1083 {
1084 return 0;
1085 }
1086
1087 static inline int pci_restore_state(struct pci_dev *dev)
1088 {
1089 return 0;
1090 }
1091
1092 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
1093 {
1094 return 0;
1095 }
1096
1097 static inline pci_power_t pci_choose_state(struct pci_dev *dev,
1098 pm_message_t state)
1099 {
1100 return PCI_D0;
1101 }
1102
1103 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
1104 int enable)
1105 {
1106 return 0;
1107 }
1108
1109 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
1110 {
1111 return -EIO;
1112 }
1113
1114 static inline void pci_release_regions(struct pci_dev *dev)
1115 { }
1116
1117 #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
1118
1119 static inline void pci_block_user_cfg_access(struct pci_dev *dev)
1120 { }
1121
1122 static inline void pci_unblock_user_cfg_access(struct pci_dev *dev)
1123 { }
1124
1125 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
1126 { return NULL; }
1127
1128 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
1129 unsigned int devfn)
1130 { return NULL; }
1131
1132 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
1133 unsigned int devfn)
1134 { return NULL; }
1135
1136 #endif /* CONFIG_PCI */
1137
1138 /* Include architecture-dependent settings and functions */
1139
1140 #include <asm/pci.h>
1141
1142 #ifndef PCIBIOS_MAX_MEM_32
1143 #define PCIBIOS_MAX_MEM_32 (-1)
1144 #endif
1145
1146 /* these helpers provide future and backwards compatibility
1147 * for accessing popular PCI BAR info */
1148 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
1149 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end)
1150 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags)
1151 #define pci_resource_len(dev,bar) \
1152 ((pci_resource_start((dev), (bar)) == 0 && \
1153 pci_resource_end((dev), (bar)) == \
1154 pci_resource_start((dev), (bar))) ? 0 : \
1155 \
1156 (pci_resource_end((dev), (bar)) - \
1157 pci_resource_start((dev), (bar)) + 1))
1158
1159 /* Similar to the helpers above, these manipulate per-pci_dev
1160 * driver-specific data. They are really just a wrapper around
1161 * the generic device structure functions of these calls.
1162 */
1163 static inline void *pci_get_drvdata(struct pci_dev *pdev)
1164 {
1165 return dev_get_drvdata(&pdev->dev);
1166 }
1167
1168 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
1169 {
1170 dev_set_drvdata(&pdev->dev, data);
1171 }
1172
1173 /* If you want to know what to call your pci_dev, ask this function.
1174 * Again, it's a wrapper around the generic device.
1175 */
1176 static inline const char *pci_name(const struct pci_dev *pdev)
1177 {
1178 return dev_name(&pdev->dev);
1179 }
1180
1181
1182 /* Some archs don't want to expose struct resource to userland as-is
1183 * in sysfs and /proc
1184 */
1185 #ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
1186 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
1187 const struct resource *rsrc, resource_size_t *start,
1188 resource_size_t *end)
1189 {
1190 *start = rsrc->start;
1191 *end = rsrc->end;
1192 }
1193 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
1194
1195
1196 /*
1197 * The world is not perfect and supplies us with broken PCI devices.
1198 * For at least a part of these bugs we need a work-around, so both
1199 * generic (drivers/pci/quirks.c) and per-architecture code can define
1200 * fixup hooks to be called for particular buggy devices.
1201 */
1202
1203 struct pci_fixup {
1204 u16 vendor, device; /* You can use PCI_ANY_ID here of course */
1205 void (*hook)(struct pci_dev *dev);
1206 };
1207
1208 enum pci_fixup_pass {
1209 pci_fixup_early, /* Before probing BARs */
1210 pci_fixup_header, /* After reading configuration header */
1211 pci_fixup_final, /* Final phase of device fixups */
1212 pci_fixup_enable, /* pci_enable_device() time */
1213 pci_fixup_resume, /* pci_device_resume() */
1214 pci_fixup_suspend, /* pci_device_suspend */
1215 pci_fixup_resume_early, /* pci_device_resume_early() */
1216 };
1217
1218 /* Anonymous variables would be nice... */
1219 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook) \
1220 static const struct pci_fixup __pci_fixup_##name __used \
1221 __attribute__((__section__(#section))) = { vendor, device, hook };
1222 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
1223 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
1224 vendor##device##hook, vendor, device, hook)
1225 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
1226 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
1227 vendor##device##hook, vendor, device, hook)
1228 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
1229 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
1230 vendor##device##hook, vendor, device, hook)
1231 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
1232 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
1233 vendor##device##hook, vendor, device, hook)
1234 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
1235 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
1236 resume##vendor##device##hook, vendor, device, hook)
1237 #define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
1238 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
1239 resume_early##vendor##device##hook, vendor, device, hook)
1240 #define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
1241 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
1242 suspend##vendor##device##hook, vendor, device, hook)
1243
1244
1245 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
1246
1247 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
1248 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
1249 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
1250 int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name);
1251 int pcim_iomap_regions_request_all(struct pci_dev *pdev, u16 mask,
1252 const char *name);
1253 void pcim_iounmap_regions(struct pci_dev *pdev, u16 mask);
1254
1255 extern int pci_pci_problems;
1256 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */
1257 #define PCIPCI_TRITON 2
1258 #define PCIPCI_NATOMA 4
1259 #define PCIPCI_VIAETBF 8
1260 #define PCIPCI_VSFX 16
1261 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
1262 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
1263
1264 extern unsigned long pci_cardbus_io_size;
1265 extern unsigned long pci_cardbus_mem_size;
1266 extern u8 __devinitdata pci_dfl_cache_line_size;
1267 extern u8 pci_cache_line_size;
1268
1269 extern unsigned long pci_hotplug_io_size;
1270 extern unsigned long pci_hotplug_mem_size;
1271
1272 int pcibios_add_platform_entries(struct pci_dev *dev);
1273 void pcibios_disable_device(struct pci_dev *dev);
1274 int pcibios_set_pcie_reset_state(struct pci_dev *dev,
1275 enum pcie_reset_state state);
1276
1277 #ifdef CONFIG_PCI_MMCONFIG
1278 extern void __init pci_mmcfg_early_init(void);
1279 extern void __init pci_mmcfg_late_init(void);
1280 #else
1281 static inline void pci_mmcfg_early_init(void) { }
1282 static inline void pci_mmcfg_late_init(void) { }
1283 #endif
1284
1285 int pci_ext_cfg_avail(struct pci_dev *dev);
1286
1287 void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
1288
1289 #ifdef CONFIG_PCI_IOV
1290 extern int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
1291 extern void pci_disable_sriov(struct pci_dev *dev);
1292 extern irqreturn_t pci_sriov_migration(struct pci_dev *dev);
1293 #else
1294 static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
1295 {
1296 return -ENODEV;
1297 }
1298 static inline void pci_disable_sriov(struct pci_dev *dev)
1299 {
1300 }
1301 static inline irqreturn_t pci_sriov_migration(struct pci_dev *dev)
1302 {
1303 return IRQ_NONE;
1304 }
1305 #endif
1306
1307 #if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
1308 extern void pci_hp_create_module_link(struct pci_slot *pci_slot);
1309 extern void pci_hp_remove_module_link(struct pci_slot *pci_slot);
1310 #endif
1311
1312 /**
1313 * pci_pcie_cap - get the saved PCIe capability offset
1314 * @dev: PCI device
1315 *
1316 * PCIe capability offset is calculated at PCI device initialization
1317 * time and saved in the data structure. This function returns saved
1318 * PCIe capability offset. Using this instead of pci_find_capability()
1319 * reduces unnecessary search in the PCI configuration space. If you
1320 * need to calculate PCIe capability offset from raw device for some
1321 * reasons, please use pci_find_capability() instead.
1322 */
1323 static inline int pci_pcie_cap(struct pci_dev *dev)
1324 {
1325 return dev->pcie_cap;
1326 }
1327
1328 /**
1329 * pci_is_pcie - check if the PCI device is PCI Express capable
1330 * @dev: PCI device
1331 *
1332 * Retrun true if the PCI device is PCI Express capable, false otherwise.
1333 */
1334 static inline bool pci_is_pcie(struct pci_dev *dev)
1335 {
1336 return !!pci_pcie_cap(dev);
1337 }
1338
1339 void pci_request_acs(void);
1340
1341 #endif /* __KERNEL__ */
1342 #endif /* LINUX_PCI_H */
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