include/linux/pci.h

   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/mod_devicetable.h>
  21
  22 /* Include the pci register defines */
  23 #include <linux/pci_regs.h>
  24
  25 /* Include the ID list */
  26 #include <linux/pci_ids.h>
  27
  28 /*
  29  * The PCI interface treats multi-function devices as independent
  30  * devices.  The slot/function address of each device is encoded
  31  * in a single byte as follows:
  32  *
  33  *      7:3 = slot
  34  *      2:0 = function
  35  */
  36 #define PCI_DEVFN(slot,func)    ((((slot) & 0x1f) << 3) | ((func) & 0x07))
  37 #define PCI_SLOT(devfn)         (((devfn) >> 3) & 0x1f)
  38 #define PCI_FUNC(devfn)         ((devfn) & 0x07)
  39
  40 /* Ioctls for /proc/bus/pci/X/Y nodes. */
  41 #define PCIIOC_BASE             ('P' << 24 | 'C' << 16 | 'I' << 8)
  42 #define PCIIOC_CONTROLLER       (PCIIOC_BASE | 0x00)    /* Get controller for PCI device. */
  43 #define PCIIOC_MMAP_IS_IO       (PCIIOC_BASE | 0x01)    /* Set mmap state to I/O space. */
  44 #define PCIIOC_MMAP_IS_MEM      (PCIIOC_BASE | 0x02)    /* Set mmap state to MEM space. */
  45 #define PCIIOC_WRITE_COMBINE    (PCIIOC_BASE | 0x03)    /* Enable/disable write-combining. */
  46
  47 #ifdef __KERNEL__
  48
  49 #include <linux/types.h>
  50 #include <linux/config.h>
  51 #include <linux/ioport.h>
  52 #include <linux/list.h>
  53 #include <linux/errno.h>
  54 #include <linux/device.h>
  55
  56 /* File state for mmap()s on /proc/bus/pci/X/Y */
  57 enum pci_mmap_state {
  58         pci_mmap_io,
  59         pci_mmap_mem
  60 };
  61
  62 /* This defines the direction arg to the DMA mapping routines. */
  63 #define PCI_DMA_BIDIRECTIONAL   0
  64 #define PCI_DMA_TODEVICE        1
  65 #define PCI_DMA_FROMDEVICE      2
  66 #define PCI_DMA_NONE            3
  67
  68 #define DEVICE_COUNT_COMPATIBLE 4
  69 #define DEVICE_COUNT_RESOURCE   12
  70
  71 typedef int __bitwise pci_power_t;
  72
  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)
  80
  81 /*
  82  * The pci_dev structure is used to describe PCI devices.
  83  */
  84 struct pci_dev {
  85         struct list_head global_list;   /* node in list of all PCI devices */
  86         struct list_head bus_list;      /* node in per-bus list */
  87         struct pci_bus  *bus;           /* bus this device is on */
  88         struct pci_bus  *subordinate;   /* bus this device bridges to */
  89
  90         void            *sysdata;       /* hook for sys-specific extension */
  91         struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
  92
  93         unsigned int    devfn;          /* encoded device & function index */
  94         unsigned short  vendor;
  95         unsigned short  device;
  96         unsigned short  subsystem_vendor;
  97         unsigned short  subsystem_device;
  98         unsigned int    class;          /* 3 bytes: (base,sub,prog-if) */
  99         u8              hdr_type;       /* PCI header type (`multi' flag masked out) */
 100         u8              rom_base_reg;   /* which config register controls the ROM */
 101
 102         struct pci_driver *driver;      /* which driver has allocated this device */
 103         u64             dma_mask;       /* Mask of the bits of bus address this
 104                                            device implements.  Normally this is
 105                                            0xffffffff.  You only need to change
 106                                            this if your device has broken DMA
 107                                            or supports 64-bit transfers.  */
 108
 109         pci_power_t     current_state;  /* Current operating state. In ACPI-speak,
 110                                            this is D0-D3, D0 being fully functional,
 111                                            and D3 being off. */
 112
 113         struct  device  dev;            /* Generic device interface */
 114
 115         /* device is compatible with these IDs */
 116         unsigned short vendor_compatible[DEVICE_COUNT_COMPATIBLE];
 117         unsigned short device_compatible[DEVICE_COUNT_COMPATIBLE];
 118
 119         int             cfg_size;       /* Size of configuration space */
 120
 121         /*
 122          * Instead of touching interrupt line and base address registers
 123          * directly, use the values stored here. They might be different!
 124          */
 125         unsigned int    irq;
 126         struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
 127
 128         /* These fields are used by common fixups */
 129         unsigned int    transparent:1;  /* Transparent PCI bridge */
 130         unsigned int    multifunction:1;/* Part of multi-function device */
 131         /* keep track of device state */
 132         unsigned int    is_enabled:1;   /* pci_enable_device has been called */
 133         unsigned int    is_busmaster:1; /* device is busmaster */
 134         unsigned int    no_msi:1;       /* device may not use msi */
 135         unsigned int    block_ucfg_access:1;    /* userspace config space access is blocked */
 136
 137         u32             saved_config_space[16]; /* config space saved at suspend time */
 138         struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
 139         int rom_attr_enabled;           /* has display of the rom attribute been enabled? */
 140         struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
 141 };
 142
 143 #define pci_dev_g(n) list_entry(n, struct pci_dev, global_list)
 144 #define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
 145 #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
 146 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
 147
 148 /*
 149  *  For PCI devices, the region numbers are assigned this way:
 150  *
 151  *      0-5     standard PCI regions
 152  *      6       expansion ROM
 153  *      7-10    bridges: address space assigned to buses behind the bridge
 154  */
 155
 156 #define PCI_ROM_RESOURCE        6
 157 #define PCI_BRIDGE_RESOURCES    7
 158 #define PCI_NUM_RESOURCES       11
 159
 160 #ifndef PCI_BUS_NUM_RESOURCES
 161 #define PCI_BUS_NUM_RESOURCES   8
 162 #endif
 163
 164 #define PCI_REGION_FLAG_MASK    0x0fU   /* These bits of resource flags tell us the PCI region flags */
 165
 166 struct pci_bus {
 167         struct list_head node;          /* node in list of buses */
 168         struct pci_bus  *parent;        /* parent bus this bridge is on */
 169         struct list_head children;      /* list of child buses */
 170         struct list_head devices;       /* list of devices on this bus */
 171         struct pci_dev  *self;          /* bridge device as seen by parent */
 172         struct resource *resource[PCI_BUS_NUM_RESOURCES];
 173                                         /* address space routed to this bus */
 174
 175         struct pci_ops  *ops;           /* configuration access functions */
 176         void            *sysdata;       /* hook for sys-specific extension */
 177         struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
 178
 179         unsigned char   number;         /* bus number */
 180         unsigned char   primary;        /* number of primary bridge */
 181         unsigned char   secondary;      /* number of secondary bridge */
 182         unsigned char   subordinate;    /* max number of subordinate buses */
 183
 184         char            name[48];
 185
 186         unsigned short  bridge_ctl;     /* manage NO_ISA/FBB/et al behaviors */
 187         unsigned short  pad2;
 188         struct device           *bridge;
 189         struct class_device     class_dev;
 190         struct bin_attribute    *legacy_io; /* legacy I/O for this bus */
 191         struct bin_attribute    *legacy_mem; /* legacy mem */
 192 };
 193
 194 #define pci_bus_b(n)    list_entry(n, struct pci_bus, node)
 195 #define to_pci_bus(n)   container_of(n, struct pci_bus, class_dev)
 196
 197 /*
 198  * Error values that may be returned by PCI functions.
 199  */
 200 #define PCIBIOS_SUCCESSFUL              0x00
 201 #define PCIBIOS_FUNC_NOT_SUPPORTED      0x81
 202 #define PCIBIOS_BAD_VENDOR_ID           0x83
 203 #define PCIBIOS_DEVICE_NOT_FOUND        0x86
 204 #define PCIBIOS_BAD_REGISTER_NUMBER     0x87
 205 #define PCIBIOS_SET_FAILED              0x88
 206 #define PCIBIOS_BUFFER_TOO_SMALL        0x89
 207
 208 /* Low-level architecture-dependent routines */
 209
 210 struct pci_ops {
 211         int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
 212         int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
 213 };
 214
 215 struct pci_raw_ops {
 216         int (*read)(unsigned int domain, unsigned int bus, unsigned int devfn,
 217                     int reg, int len, u32 *val);
 218         int (*write)(unsigned int domain, unsigned int bus, unsigned int devfn,
 219                      int reg, int len, u32 val);
 220 };
 221
 222 extern struct pci_raw_ops *raw_pci_ops;
 223
 224 struct pci_bus_region {
 225         unsigned long start;
 226         unsigned long end;
 227 };
 228
 229 struct pci_dynids {
 230         spinlock_t lock;            /* protects list, index */
 231         struct list_head list;      /* for IDs added at runtime */
 232         unsigned int use_driver_data:1; /* pci_driver->driver_data is used */
 233 };
 234
 235 struct module;
 236 struct pci_driver {
 237         struct list_head node;
 238         char *name;
 239         const struct pci_device_id *id_table;   /* must be non-NULL for probe to be called */
 240         int  (*probe)  (struct pci_dev *dev, const struct pci_device_id *id);   /* New device inserted */
 241         void (*remove) (struct pci_dev *dev);   /* Device removed (NULL if not a hot-plug capable driver) */
 242         int  (*suspend) (struct pci_dev *dev, pm_message_t state);      /* Device suspended */
 243         int  (*resume) (struct pci_dev *dev);                   /* Device woken up */
 244         int  (*enable_wake) (struct pci_dev *dev, pci_power_t state, int enable);   /* Enable wake event */
 245         void (*shutdown) (struct pci_dev *dev);
 246
 247         struct device_driver    driver;
 248         struct pci_dynids dynids;
 249 };
 250
 251 #define to_pci_driver(drv) container_of(drv,struct pci_driver, driver)
 252
 253 /**
 254  * PCI_DEVICE - macro used to describe a specific pci device
 255  * @vend: the 16 bit PCI Vendor ID
 256  * @dev: the 16 bit PCI Device ID
 257  *
 258  * This macro is used to create a struct pci_device_id that matches a
 259  * specific device.  The subvendor and subdevice fields will be set to
 260  * PCI_ANY_ID.
 261  */
 262 #define PCI_DEVICE(vend,dev) \
 263         .vendor = (vend), .device = (dev), \
 264         .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
 265
 266 /**
 267  * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
 268  * @dev_class: the class, subclass, prog-if triple for this device
 269  * @dev_class_mask: the class mask for this device
 270  *
 271  * This macro is used to create a struct pci_device_id that matches a
 272  * specific PCI class.  The vendor, device, subvendor, and subdevice
 273  * fields will be set to PCI_ANY_ID.
 274  */
 275 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
 276         .class = (dev_class), .class_mask = (dev_class_mask), \
 277         .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
 278         .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
 279
 280 /*
 281  * pci_module_init is obsolete, this stays here till we fix up all usages of it
 282  * in the tree.
 283  */
 284 #define pci_module_init pci_register_driver
 285
 286 /* these external functions are only available when PCI support is enabled */
 287 #ifdef CONFIG_PCI
 288
 289 extern struct bus_type pci_bus_type;
 290
 291 /* Do NOT directly access these two variables, unless you are arch specific pci
 292  * code, or pci core code. */
 293 extern struct list_head pci_root_buses; /* list of all known PCI buses */
 294 extern struct list_head pci_devices;    /* list of all devices */
 295
 296 void pcibios_fixup_bus(struct pci_bus *);
 297 int pcibios_enable_device(struct pci_dev *, int mask);
 298 char *pcibios_setup (char *str);
 299
 300 /* Used only when drivers/pci/setup.c is used */
 301 void pcibios_align_resource(void *, struct resource *,
 302                             unsigned long, unsigned long);
 303 void pcibios_update_irq(struct pci_dev *, int irq);
 304
 305 /* Generic PCI functions used internally */
 306
 307 extern struct pci_bus *pci_find_bus(int domain, int busnr);
 308 void pci_bus_add_devices(struct pci_bus *bus);
 309 struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus, struct pci_ops *ops, void *sysdata);
 310 static inline struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata)
 311 {
 312         struct pci_bus *root_bus;
 313         root_bus = pci_scan_bus_parented(NULL, bus, ops, sysdata);
 314         if (root_bus)
 315                 pci_bus_add_devices(root_bus);
 316         return root_bus;
 317 }
 318 struct pci_bus *pci_create_bus(struct device *parent, int bus, struct pci_ops *ops, void *sysdata);
 319 struct pci_bus * pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, int busnr);
 320 int pci_scan_slot(struct pci_bus *bus, int devfn);
 321 struct pci_dev * pci_scan_single_device(struct pci_bus *bus, int devfn);
 322 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
 323 unsigned int pci_scan_child_bus(struct pci_bus *bus);
 324 void pci_bus_add_device(struct pci_dev *dev);
 325 void pci_read_bridge_bases(struct pci_bus *child);
 326 struct resource *pci_find_parent_resource(const struct pci_dev *dev, struct resource *res);
 327 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
 328 extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
 329 extern void pci_dev_put(struct pci_dev *dev);
 330 extern void pci_remove_bus(struct pci_bus *b);
 331 extern void pci_remove_bus_device(struct pci_dev *dev);
 332 void pci_setup_cardbus(struct pci_bus *bus);
 333
 334 /* Generic PCI functions exported to card drivers */
 335
 336 struct pci_dev *pci_find_device (unsigned int vendor, unsigned int device, const struct pci_dev *from);
 337 struct pci_dev *pci_find_device_reverse (unsigned int vendor, unsigned int device, const struct pci_dev *from);
 338 struct pci_dev *pci_find_slot (unsigned int bus, unsigned int devfn);
 339 int pci_find_capability (struct pci_dev *dev, int cap);
 340 int pci_find_next_capability (struct pci_dev *dev, u8 pos, int cap);
 341 int pci_find_ext_capability (struct pci_dev *dev, int cap);
 342 struct pci_bus * pci_find_next_bus(const struct pci_bus *from);
 343
 344 struct pci_dev *pci_get_device (unsigned int vendor, unsigned int device, struct pci_dev *from);
 345 struct pci_dev *pci_get_subsys (unsigned int vendor, unsigned int device,
 346                                 unsigned int ss_vendor, unsigned int ss_device,
 347                                 struct pci_dev *from);
 348 struct pci_dev *pci_get_slot (struct pci_bus *bus, unsigned int devfn);
 349 struct pci_dev *pci_get_class (unsigned int class, struct pci_dev *from);
 350 int pci_dev_present(const struct pci_device_id *ids);
 351
 352 int pci_bus_read_config_byte (struct pci_bus *bus, unsigned int devfn, int where, u8 *val);
 353 int pci_bus_read_config_word (struct pci_bus *bus, unsigned int devfn, int where, u16 *val);
 354 int pci_bus_read_config_dword (struct pci_bus *bus, unsigned int devfn, int where, u32 *val);
 355 int pci_bus_write_config_byte (struct pci_bus *bus, unsigned int devfn, int where, u8 val);
 356 int pci_bus_write_config_word (struct pci_bus *bus, unsigned int devfn, int where, u16 val);
 357 int pci_bus_write_config_dword (struct pci_bus *bus, unsigned int devfn, int where, u32 val);
 358
 359 static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val)
 360 {
 361         return pci_bus_read_config_byte (dev->bus, dev->devfn, where, val);
 362 }
 363 static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val)
 364 {
 365         return pci_bus_read_config_word (dev->bus, dev->devfn, where, val);
 366 }
 367 static inline int pci_read_config_dword(struct pci_dev *dev, int where, u32 *val)
 368 {
 369         return pci_bus_read_config_dword (dev->bus, dev->devfn, where, val);
 370 }
 371 static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val)
 372 {
 373         return pci_bus_write_config_byte (dev->bus, dev->devfn, where, val);
 374 }
 375 static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val)
 376 {
 377         return pci_bus_write_config_word (dev->bus, dev->devfn, where, val);
 378 }
 379 static inline int pci_write_config_dword(struct pci_dev *dev, int where, u32 val)
 380 {
 381         return pci_bus_write_config_dword (dev->bus, dev->devfn, where, val);
 382 }
 383
 384 int pci_enable_device(struct pci_dev *dev);
 385 int pci_enable_device_bars(struct pci_dev *dev, int mask);
 386 void pci_disable_device(struct pci_dev *dev);
 387 void pci_set_master(struct pci_dev *dev);
 388 #define HAVE_PCI_SET_MWI
 389 int pci_set_mwi(struct pci_dev *dev);
 390 void pci_clear_mwi(struct pci_dev *dev);
 391 void pci_intx(struct pci_dev *dev, int enable);
 392 int pci_set_dma_mask(struct pci_dev *dev, u64 mask);
 393 int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask);
 394 void pci_update_resource(struct pci_dev *dev, struct resource *res, int resno);
 395 int pci_assign_resource(struct pci_dev *dev, int i);
 396 void pci_restore_bars(struct pci_dev *dev);
 397
 398 /* ROM control related routines */
 399 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
 400 void __iomem __must_check *pci_map_rom_copy(struct pci_dev *pdev, size_t *size);
 401 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
 402 void pci_remove_rom(struct pci_dev *pdev);
 403
 404 /* Power management related routines */
 405 int pci_save_state(struct pci_dev *dev);
 406 int pci_restore_state(struct pci_dev *dev);
 407 int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
 408 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
 409 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable);
 410
 411 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
 412 void pci_bus_assign_resources(struct pci_bus *bus);
 413 void pci_bus_size_bridges(struct pci_bus *bus);
 414 int pci_claim_resource(struct pci_dev *, int);
 415 void pci_assign_unassigned_resources(void);
 416 void pdev_enable_device(struct pci_dev *);
 417 void pdev_sort_resources(struct pci_dev *, struct resource_list *);
 418 void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
 419                     int (*)(struct pci_dev *, u8, u8));
 420 #define HAVE_PCI_REQ_REGIONS    2
 421 int pci_request_regions(struct pci_dev *, char *);
 422 void pci_release_regions(struct pci_dev *);
 423 int pci_request_region(struct pci_dev *, int, char *);
 424 void pci_release_region(struct pci_dev *, int);
 425
 426 /* drivers/pci/bus.c */
 427 int pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res,
 428                            unsigned long size, unsigned long align,
 429                            unsigned long min, unsigned int type_mask,
 430                            void (*alignf)(void *, struct resource *,
 431                                           unsigned long, unsigned long),
 432                            void *alignf_data);
 433 void pci_enable_bridges(struct pci_bus *bus);
 434
 435 /* Proper probing supporting hot-pluggable devices */
 436 int __pci_register_driver(struct pci_driver *, struct module *);
 437 static inline int pci_register_driver(struct pci_driver *driver)
 438 {
 439         return __pci_register_driver(driver, THIS_MODULE);
 440 }
 441
 442 void pci_unregister_driver(struct pci_driver *);
 443 void pci_remove_behind_bridge(struct pci_dev *);
 444 struct pci_driver *pci_dev_driver(const struct pci_dev *);
 445 const struct pci_device_id *pci_match_device(struct pci_driver *drv, struct pci_dev *dev);
 446 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, struct pci_dev *dev);
 447 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max, int pass);
 448
 449 void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *),
 450                   void *userdata);
 451
 452 /* kmem_cache style wrapper around pci_alloc_consistent() */
 453
 454 #include <linux/dmapool.h>
 455
 456 #define pci_pool dma_pool
 457 #define pci_pool_create(name, pdev, size, align, allocation) \
 458                 dma_pool_create(name, &pdev->dev, size, align, allocation)
 459 #define pci_pool_destroy(pool) dma_pool_destroy(pool)
 460 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
 461 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
 462
 463 enum pci_dma_burst_strategy {
 464         PCI_DMA_BURST_INFINITY, /* make bursts as large as possible,
 465                                    strategy_parameter is N/A */
 466         PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
 467                                    byte boundaries */
 468         PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
 469                                    strategy_parameter byte boundaries */
 470 };
 471
 472 #if defined(CONFIG_ISA) || defined(CONFIG_EISA)
 473 extern struct pci_dev *isa_bridge;
 474 #endif
 475
 476 struct msix_entry {
 477         u16     vector; /* kernel uses to write allocated vector */
 478         u16     entry;  /* driver uses to specify entry, OS writes */
 479 };
 480
 481 #ifndef CONFIG_PCI_MSI
 482 static inline void pci_scan_msi_device(struct pci_dev *dev) {}
 483 static inline int pci_enable_msi(struct pci_dev *dev) {return -1;}
 484 static inline void pci_disable_msi(struct pci_dev *dev) {}
 485 static inline int pci_enable_msix(struct pci_dev* dev,
 486         struct msix_entry *entries, int nvec) {return -1;}
 487 static inline void pci_disable_msix(struct pci_dev *dev) {}
 488 static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev) {}
 489 #else
 490 extern void pci_scan_msi_device(struct pci_dev *dev);
 491 extern int pci_enable_msi(struct pci_dev *dev);
 492 extern void pci_disable_msi(struct pci_dev *dev);
 493 extern int pci_enable_msix(struct pci_dev* dev,
 494         struct msix_entry *entries, int nvec);
 495 extern void pci_disable_msix(struct pci_dev *dev);
 496 extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
 497 #endif
 498
 499 extern void pci_block_user_cfg_access(struct pci_dev *dev);
 500 extern void pci_unblock_user_cfg_access(struct pci_dev *dev);
 501
 502 /*
 503  * PCI domain support.  Sometimes called PCI segment (eg by ACPI),
 504  * a PCI domain is defined to be a set of PCI busses which share
 505  * configuration space.
 506  */
 507 #ifndef CONFIG_PCI_DOMAINS
 508 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
 509 static inline int pci_proc_domain(struct pci_bus *bus)
 510 {
 511         return 0;
 512 }
 513 #endif
 514
 515 #else /* CONFIG_PCI is not enabled */
 516
 517 /*
 518  *  If the system does not have PCI, clearly these return errors.  Define
 519  *  these as simple inline functions to avoid hair in drivers.
 520  */
 521
 522 #define _PCI_NOP(o,s,t) \
 523         static inline int pci_##o##_config_##s (struct pci_dev *dev, int where, t val) \
 524                 { return PCIBIOS_FUNC_NOT_SUPPORTED; }
 525 #define _PCI_NOP_ALL(o,x)       _PCI_NOP(o,byte,u8 x) \
 526                                 _PCI_NOP(o,word,u16 x) \
 527                                 _PCI_NOP(o,dword,u32 x)
 528 _PCI_NOP_ALL(read, *)
 529 _PCI_NOP_ALL(write,)
 530
 531 static inline struct pci_dev *pci_find_device(unsigned int vendor, unsigned int device, const struct pci_dev *from)
 532 { return NULL; }
 533
 534 static inline struct pci_dev *pci_find_slot(unsigned int bus, unsigned int devfn)
 535 { return NULL; }
 536
 537 static inline struct pci_dev *pci_get_device (unsigned int vendor, unsigned int device, struct pci_dev *from)
 538 { return NULL; }
 539
 540 static inline struct pci_dev *pci_get_subsys (unsigned int vendor, unsigned int device,
 541 unsigned int ss_vendor, unsigned int ss_device, struct pci_dev *from)
 542 { return NULL; }
 543
 544 static inline struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from)
 545 { return NULL; }
 546
 547 #define pci_dev_present(ids)    (0)
 548 #define pci_dev_put(dev)        do { } while (0)
 549
 550 static inline void pci_set_master(struct pci_dev *dev) { }
 551 static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
 552 static inline void pci_disable_device(struct pci_dev *dev) { }
 553 static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask) { return -EIO; }
 554 static inline int pci_assign_resource(struct pci_dev *dev, int i) { return -EBUSY;}
 555 static inline int __pci_register_driver(struct pci_driver *drv, struct module *owner) { return 0;}
 556 static inline int pci_register_driver(struct pci_driver *drv) { return 0;}
 557 static inline void pci_unregister_driver(struct pci_driver *drv) { }
 558 static inline int pci_find_capability (struct pci_dev *dev, int cap) {return 0; }
 559 static inline int pci_find_next_capability (struct pci_dev *dev, u8 post, int cap) { return 0; }
 560 static inline int pci_find_ext_capability (struct pci_dev *dev, int cap) {return 0; }
 561 static inline const struct pci_device_id *pci_match_device(const struct pci_device_id *ids, const struct pci_dev *dev) { return NULL; }
 562
 563 /* Power management related routines */
 564 static inline int pci_save_state(struct pci_dev *dev) { return 0; }
 565 static inline int pci_restore_state(struct pci_dev *dev) { return 0; }
 566 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state) { return 0; }
 567 static inline pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state) { return PCI_D0; }
 568 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable) { return 0; }
 569
 570 #define isa_bridge      ((struct pci_dev *)NULL)
 571
 572 #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
 573
 574 static inline void pci_block_user_cfg_access(struct pci_dev *dev) { }
 575 static inline void pci_unblock_user_cfg_access(struct pci_dev *dev) { }
 576
 577 #endif /* CONFIG_PCI */
 578
 579 /* Include architecture-dependent settings and functions */
 580
 581 #include <asm/pci.h>
 582
 583 /* these helpers provide future and backwards compatibility
 584  * for accessing popular PCI BAR info */
 585 #define pci_resource_start(dev,bar)   ((dev)->resource[(bar)].start)
 586 #define pci_resource_end(dev,bar)     ((dev)->resource[(bar)].end)
 587 #define pci_resource_flags(dev,bar)   ((dev)->resource[(bar)].flags)
 588 #define pci_resource_len(dev,bar) \
 589         ((pci_resource_start((dev),(bar)) == 0 &&       \
 590           pci_resource_end((dev),(bar)) ==              \
 591           pci_resource_start((dev),(bar))) ? 0 :        \
 592                                                         \
 593          (pci_resource_end((dev),(bar)) -               \
 594           pci_resource_start((dev),(bar)) + 1))
 595
 596 /* Similar to the helpers above, these manipulate per-pci_dev
 597  * driver-specific data.  They are really just a wrapper around
 598  * the generic device structure functions of these calls.
 599  */
 600 static inline void *pci_get_drvdata (struct pci_dev *pdev)
 601 {
 602         return dev_get_drvdata(&pdev->dev);
 603 }
 604
 605 static inline void pci_set_drvdata (struct pci_dev *pdev, void *data)
 606 {
 607         dev_set_drvdata(&pdev->dev, data);
 608 }
 609
 610 /* If you want to know what to call your pci_dev, ask this function.
 611  * Again, it's a wrapper around the generic device.
 612  */
 613 static inline char *pci_name(struct pci_dev *pdev)
 614 {
 615         return pdev->dev.bus_id;
 616 }
 617
 618
 619 /* Some archs don't want to expose struct resource to userland as-is
 620  * in sysfs and /proc
 621  */
 622 #ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
 623 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
 624                 const struct resource *rsrc, u64 *start, u64 *end)
 625 {
 626         *start = rsrc->start;
 627         *end = rsrc->end;
 628 }
 629 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
 630
 631
 632 /*
 633  *  The world is not perfect and supplies us with broken PCI devices.
 634  *  For at least a part of these bugs we need a work-around, so both
 635  *  generic (drivers/pci/quirks.c) and per-architecture code can define
 636  *  fixup hooks to be called for particular buggy devices.
 637  */
 638
 639 struct pci_fixup {
 640         u16 vendor, device;     /* You can use PCI_ANY_ID here of course */
 641         void (*hook)(struct pci_dev *dev);
 642 };
 643
 644 enum pci_fixup_pass {
 645         pci_fixup_early,        /* Before probing BARs */
 646         pci_fixup_header,       /* After reading configuration header */
 647         pci_fixup_final,        /* Final phase of device fixups */
 648         pci_fixup_enable,       /* pci_enable_device() time */
 649 };
 650
 651 /* Anonymous variables would be nice... */
 652 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook)  \
 653         static const struct pci_fixup __pci_fixup_##name __attribute_used__ \
 654         __attribute__((__section__(#section))) = { vendor, device, hook };
 655 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook)                   \
 656         DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early,                     \
 657                         vendor##device##hook, vendor, device, hook)
 658 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook)                  \
 659         DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header,                    \
 660                         vendor##device##hook, vendor, device, hook)
 661 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook)                   \
 662         DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final,                     \
 663                         vendor##device##hook, vendor, device, hook)
 664 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook)                  \
 665         DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable,                    \
 666                         vendor##device##hook, vendor, device, hook)
 667
 668
 669 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
 670
 671 extern int pci_pci_problems;
 672 #define PCIPCI_FAIL             1
 673 #define PCIPCI_TRITON           2
 674 #define PCIPCI_NATOMA           4
 675 #define PCIPCI_VIAETBF          8
 676 #define PCIPCI_VSFX             16
 677 #define PCIPCI_ALIMAGIK         32
 678
 679 #endif /* __KERNEL__ */
 680 #endif /* LINUX_PCI_H */