1 /* 2 * pci.h 3 * 4 * PCI defines and function prototypes 5 * Copyright 1994, Drew Eckhardt 6 * Copyright 1997--1999 Martin Mares <[email protected]> 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 /* Based on the PCI Hotplug Spec, but some values are made up by us */ 191 enum pci_bus_speed { 192 PCI_SPEED_33MHz = 0x00, 193 PCI_SPEED_66MHz = 0x01, 194 PCI_SPEED_66MHz_PCIX = 0x02, 195 PCI_SPEED_100MHz_PCIX = 0x03, 196 PCI_SPEED_133MHz_PCIX = 0x04, 197 PCI_SPEED_66MHz_PCIX_ECC = 0x05, 198 PCI_SPEED_100MHz_PCIX_ECC = 0x06, 199 PCI_SPEED_133MHz_PCIX_ECC = 0x07, 200 PCI_SPEED_66MHz_PCIX_266 = 0x09, 201 PCI_SPEED_100MHz_PCIX_266 = 0x0a, 202 PCI_SPEED_133MHz_PCIX_266 = 0x0b, 203 AGP_UNKNOWN = 0x0c, 204 AGP_1X = 0x0d, 205 AGP_2X = 0x0e, 206 AGP_4X = 0x0f, 207 AGP_8X = 0x10, 208 PCI_SPEED_66MHz_PCIX_533 = 0x11, 209 PCI_SPEED_100MHz_PCIX_533 = 0x12, 210 PCI_SPEED_133MHz_PCIX_533 = 0x13, 211 PCIE_SPEED_2_5GT = 0x14, 212 PCIE_SPEED_5_0GT = 0x15, 213 PCIE_SPEED_8_0GT = 0x16, 214 PCI_SPEED_UNKNOWN = 0xff, 215 }; 216 217 struct pci_cap_saved_data { 218 char cap_nr; 219 unsigned int size; 220 u32 data[0]; 221 }; 222 223 struct pci_cap_saved_state { 224 struct hlist_node next; 225 struct pci_cap_saved_data cap; 226 }; 227 228 struct pcie_link_state; 229 struct pci_vpd; 230 struct pci_sriov; 231 struct pci_ats; 232 233 /* 234 * The pci_dev structure is used to describe PCI devices. 235 */ 236 struct pci_dev { 237 struct list_head bus_list; /* node in per-bus list */ 238 struct pci_bus *bus; /* bus this device is on */ 239 struct pci_bus *subordinate; /* bus this device bridges to */ 240 241 void *sysdata; /* hook for sys-specific extension */ 242 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */ 243 struct pci_slot *slot; /* Physical slot this device is in */ 244 245 unsigned int devfn; /* encoded device & function index */ 246 unsigned short vendor; 247 unsigned short device; 248 unsigned short subsystem_vendor; 249 unsigned short subsystem_device; 250 unsigned int class; /* 3 bytes: (base,sub,prog-if) */ 251 u8 revision; /* PCI revision, low byte of class word */ 252 u8 hdr_type; /* PCI header type (`multi' flag masked out) */ 253 u8 pcie_cap; /* PCI-E capability offset */ 254 u8 pcie_type; /* PCI-E device/port type */ 255 u8 rom_base_reg; /* which config register controls the ROM */ 256 u8 pin; /* which interrupt pin this device uses */ 257 258 struct pci_driver *driver; /* which driver has allocated this device */ 259 u64 dma_mask; /* Mask of the bits of bus address this 260 device implements. Normally this is 261 0xffffffff. You only need to change 262 this if your device has broken DMA 263 or supports 64-bit transfers. */ 264 265 struct device_dma_parameters dma_parms; 266 267 pci_power_t current_state; /* Current operating state. In ACPI-speak, 268 this is D0-D3, D0 being fully functional, 269 and D3 being off. */ 270 int pm_cap; /* PM capability offset in the 271 configuration space */ 272 unsigned int pme_support:5; /* Bitmask of states from which PME# 273 can be generated */ 274 unsigned int pme_interrupt:1; 275 unsigned int d1_support:1; /* Low power state D1 is supported */ 276 unsigned int d2_support:1; /* Low power state D2 is supported */ 277 unsigned int no_d1d2:1; /* Only allow D0 and D3 */ 278 unsigned int mmio_always_on:1; /* disallow turning off io/mem 279 decoding during bar sizing */ 280 unsigned int wakeup_prepared:1; 281 unsigned int d3_delay; /* D3->D0 transition time in ms */ 282 283 #ifdef CONFIG_PCIEASPM 284 struct pcie_link_state *link_state; /* ASPM link state. */ 285 #endif 286 287 pci_channel_state_t error_state; /* current connectivity state */ 288 struct device dev; /* Generic device interface */ 289 290 int cfg_size; /* Size of configuration space */ 291 292 /* 293 * Instead of touching interrupt line and base address registers 294 * directly, use the values stored here. They might be different! 295 */ 296 unsigned int irq; 297 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */ 298 resource_size_t fw_addr[DEVICE_COUNT_RESOURCE]; /* FW-assigned addr */ 299 300 /* These fields are used by common fixups */ 301 unsigned int transparent:1; /* Transparent PCI bridge */ 302 unsigned int multifunction:1;/* Part of multi-function device */ 303 /* keep track of device state */ 304 unsigned int is_added:1; 305 unsigned int is_busmaster:1; /* device is busmaster */ 306 unsigned int no_msi:1; /* device may not use msi */ 307 unsigned int block_ucfg_access:1; /* userspace config space access is blocked */ 308 unsigned int broken_parity_status:1; /* Device generates false positive parity */ 309 unsigned int irq_reroute_variant:2; /* device needs IRQ rerouting variant */ 310 unsigned int msi_enabled:1; 311 unsigned int msix_enabled:1; 312 unsigned int ari_enabled:1; /* ARI forwarding */ 313 unsigned int is_managed:1; 314 unsigned int is_pcie:1; /* Obsolete. Will be removed. 315 Use pci_is_pcie() instead */ 316 unsigned int needs_freset:1; /* Dev requires fundamental reset */ 317 unsigned int state_saved:1; 318 unsigned int is_physfn:1; 319 unsigned int is_virtfn:1; 320 unsigned int reset_fn:1; 321 unsigned int is_hotplug_bridge:1; 322 unsigned int __aer_firmware_first_valid:1; 323 unsigned int __aer_firmware_first:1; 324 pci_dev_flags_t dev_flags; 325 atomic_t enable_cnt; /* pci_enable_device has been called */ 326 327 u32 saved_config_space[16]; /* config space saved at suspend time */ 328 struct hlist_head saved_cap_space; 329 struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */ 330 int rom_attr_enabled; /* has display of the rom attribute been enabled? */ 331 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */ 332 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */ 333 #ifdef CONFIG_PCI_MSI 334 struct list_head msi_list; 335 #endif 336 struct pci_vpd *vpd; 337 #ifdef CONFIG_PCI_IOV 338 union { 339 struct pci_sriov *sriov; /* SR-IOV capability related */ 340 struct pci_dev *physfn; /* the PF this VF is associated with */ 341 }; 342 struct pci_ats *ats; /* Address Translation Service */ 343 #endif 344 }; 345 346 static inline struct pci_dev *pci_physfn(struct pci_dev *dev) 347 { 348 #ifdef CONFIG_PCI_IOV 349 if (dev->is_virtfn) 350 dev = dev->physfn; 351 #endif 352 353 return dev; 354 } 355 356 extern struct pci_dev *alloc_pci_dev(void); 357 358 #define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list) 359 #define to_pci_dev(n) container_of(n, struct pci_dev, dev) 360 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL) 361 362 static inline int pci_channel_offline(struct pci_dev *pdev) 363 { 364 return (pdev->error_state != pci_channel_io_normal); 365 } 366 367 static inline struct pci_cap_saved_state *pci_find_saved_cap( 368 struct pci_dev *pci_dev, char cap) 369 { 370 struct pci_cap_saved_state *tmp; 371 struct hlist_node *pos; 372 373 hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) { 374 if (tmp->cap.cap_nr == cap) 375 return tmp; 376 } 377 return NULL; 378 } 379 380 static inline void pci_add_saved_cap(struct pci_dev *pci_dev, 381 struct pci_cap_saved_state *new_cap) 382 { 383 hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space); 384 } 385 386 /* 387 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond 388 * to P2P or CardBus bridge windows) go in a table. Additional ones (for 389 * buses below host bridges or subtractive decode bridges) go in the list. 390 * Use pci_bus_for_each_resource() to iterate through all the resources. 391 */ 392 393 /* 394 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly 395 * and there's no way to program the bridge with the details of the window. 396 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive- 397 * decode bit set, because they are explicit and can be programmed with _SRS. 398 */ 399 #define PCI_SUBTRACTIVE_DECODE 0x1 400 401 struct pci_bus_resource { 402 struct list_head list; 403 struct resource *res; 404 unsigned int flags; 405 }; 406 407 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */ 408 409 struct pci_bus { 410 struct list_head node; /* node in list of buses */ 411 struct pci_bus *parent; /* parent bus this bridge is on */ 412 struct list_head children; /* list of child buses */ 413 struct list_head devices; /* list of devices on this bus */ 414 struct pci_dev *self; /* bridge device as seen by parent */ 415 struct list_head slots; /* list of slots on this bus */ 416 struct resource *resource[PCI_BRIDGE_RESOURCE_NUM]; 417 struct list_head resources; /* address space routed to this bus */ 418 419 struct pci_ops *ops; /* configuration access functions */ 420 void *sysdata; /* hook for sys-specific extension */ 421 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */ 422 423 unsigned char number; /* bus number */ 424 unsigned char primary; /* number of primary bridge */ 425 unsigned char secondary; /* number of secondary bridge */ 426 unsigned char subordinate; /* max number of subordinate buses */ 427 unsigned char max_bus_speed; /* enum pci_bus_speed */ 428 unsigned char cur_bus_speed; /* enum pci_bus_speed */ 429 430 char name[48]; 431 432 unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */ 433 pci_bus_flags_t bus_flags; /* Inherited by child busses */ 434 struct device *bridge; 435 struct device dev; 436 struct bin_attribute *legacy_io; /* legacy I/O for this bus */ 437 struct bin_attribute *legacy_mem; /* legacy mem */ 438 unsigned int is_added:1; 439 }; 440 441 #define pci_bus_b(n) list_entry(n, struct pci_bus, node) 442 #define to_pci_bus(n) container_of(n, struct pci_bus, dev) 443 444 /* 445 * Returns true if the pci bus is root (behind host-pci bridge), 446 * false otherwise 447 */ 448 static inline bool pci_is_root_bus(struct pci_bus *pbus) 449 { 450 return !(pbus->parent); 451 } 452 453 #ifdef CONFIG_PCI_MSI 454 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) 455 { 456 return pci_dev->msi_enabled || pci_dev->msix_enabled; 457 } 458 #else 459 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; } 460 #endif 461 462 /* 463 * Error values that may be returned by PCI functions. 464 */ 465 #define PCIBIOS_SUCCESSFUL 0x00 466 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81 467 #define PCIBIOS_BAD_VENDOR_ID 0x83 468 #define PCIBIOS_DEVICE_NOT_FOUND 0x86 469 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87 470 #define PCIBIOS_SET_FAILED 0x88 471 #define PCIBIOS_BUFFER_TOO_SMALL 0x89 472 473 /* Low-level architecture-dependent routines */ 474 475 struct pci_ops { 476 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val); 477 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val); 478 }; 479 480 /* 481 * ACPI needs to be able to access PCI config space before we've done a 482 * PCI bus scan and created pci_bus structures. 483 */ 484 extern int raw_pci_read(unsigned int domain, unsigned int bus, 485 unsigned int devfn, int reg, int len, u32 *val); 486 extern int raw_pci_write(unsigned int domain, unsigned int bus, 487 unsigned int devfn, int reg, int len, u32 val); 488 489 struct pci_bus_region { 490 resource_size_t start; 491 resource_size_t end; 492 }; 493 494 struct pci_dynids { 495 spinlock_t lock; /* protects list, index */ 496 struct list_head list; /* for IDs added at runtime */ 497 }; 498 499 /* ---------------------------------------------------------------- */ 500 /** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides 501 * a set of callbacks in struct pci_error_handlers, then that device driver 502 * will be notified of PCI bus errors, and will be driven to recovery 503 * when an error occurs. 504 */ 505 506 typedef unsigned int __bitwise pci_ers_result_t; 507 508 enum pci_ers_result { 509 /* no result/none/not supported in device driver */ 510 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1, 511 512 /* Device driver can recover without slot reset */ 513 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2, 514 515 /* Device driver wants slot to be reset. */ 516 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3, 517 518 /* Device has completely failed, is unrecoverable */ 519 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4, 520 521 /* Device driver is fully recovered and operational */ 522 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5, 523 }; 524 525 /* PCI bus error event callbacks */ 526 struct pci_error_handlers { 527 /* PCI bus error detected on this device */ 528 pci_ers_result_t (*error_detected)(struct pci_dev *dev, 529 enum pci_channel_state error); 530 531 /* MMIO has been re-enabled, but not DMA */ 532 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev); 533 534 /* PCI Express link has been reset */ 535 pci_ers_result_t (*link_reset)(struct pci_dev *dev); 536 537 /* PCI slot has been reset */ 538 pci_ers_result_t (*slot_reset)(struct pci_dev *dev); 539 540 /* Device driver may resume normal operations */ 541 void (*resume)(struct pci_dev *dev); 542 }; 543 544 /* ---------------------------------------------------------------- */ 545 546 struct module; 547 struct pci_driver { 548 struct list_head node; 549 const char *name; 550 const struct pci_device_id *id_table; /* must be non-NULL for probe to be called */ 551 int (*probe) (struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */ 552 void (*remove) (struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */ 553 int (*suspend) (struct pci_dev *dev, pm_message_t state); /* Device suspended */ 554 int (*suspend_late) (struct pci_dev *dev, pm_message_t state); 555 int (*resume_early) (struct pci_dev *dev); 556 int (*resume) (struct pci_dev *dev); /* Device woken up */ 557 void (*shutdown) (struct pci_dev *dev); 558 struct pci_error_handlers *err_handler; 559 struct device_driver driver; 560 struct pci_dynids dynids; 561 }; 562 563 #define to_pci_driver(drv) container_of(drv, struct pci_driver, driver) 564 565 /** 566 * DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table 567 * @_table: device table name 568 * 569 * This macro is used to create a struct pci_device_id array (a device table) 570 * in a generic manner. 571 */ 572 #define DEFINE_PCI_DEVICE_TABLE(_table) \ 573 const struct pci_device_id _table[] __devinitconst 574 575 /** 576 * PCI_DEVICE - macro used to describe a specific pci device 577 * @vend: the 16 bit PCI Vendor ID 578 * @dev: the 16 bit PCI Device ID 579 * 580 * This macro is used to create a struct pci_device_id that matches a 581 * specific device. The subvendor and subdevice fields will be set to 582 * PCI_ANY_ID. 583 */ 584 #define PCI_DEVICE(vend,dev) \ 585 .vendor = (vend), .device = (dev), \ 586 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID 587 588 /** 589 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class 590 * @dev_class: the class, subclass, prog-if triple for this device 591 * @dev_class_mask: the class mask for this device 592 * 593 * This macro is used to create a struct pci_device_id that matches a 594 * specific PCI class. The vendor, device, subvendor, and subdevice 595 * fields will be set to PCI_ANY_ID. 596 */ 597 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \ 598 .class = (dev_class), .class_mask = (dev_class_mask), \ 599 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \ 600 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID 601 602 /** 603 * PCI_VDEVICE - macro used to describe a specific pci device in short form 604 * @vendor: the vendor name 605 * @device: the 16 bit PCI Device ID 606 * 607 * This macro is used to create a struct pci_device_id that matches a 608 * specific PCI device. The subvendor, and subdevice fields will be set 609 * to PCI_ANY_ID. The macro allows the next field to follow as the device 610 * private data. 611 */ 612 613 #define PCI_VDEVICE(vendor, device) \ 614 PCI_VENDOR_ID_##vendor, (device), \ 615 PCI_ANY_ID, PCI_ANY_ID, 0, 0 616 617 /* these external functions are only available when PCI support is enabled */ 618 #ifdef CONFIG_PCI 619 620 extern struct bus_type pci_bus_type; 621 622 /* Do NOT directly access these two variables, unless you are arch specific pci 623 * code, or pci core code. */ 624 extern struct list_head pci_root_buses; /* list of all known PCI buses */ 625 /* Some device drivers need know if pci is initiated */ 626 extern int no_pci_devices(void); 627 628 void pcibios_fixup_bus(struct pci_bus *); 629 int __must_check pcibios_enable_device(struct pci_dev *, int mask); 630 char *pcibios_setup(char *str); 631 632 /* Used only when drivers/pci/setup.c is used */ 633 resource_size_t pcibios_align_resource(void *, const struct resource *, 634 resource_size_t, 635 resource_size_t); 636 void pcibios_update_irq(struct pci_dev *, int irq); 637 638 /* Weak but can be overriden by arch */ 639 void pci_fixup_cardbus(struct pci_bus *); 640 641 /* Generic PCI functions used internally */ 642 643 void pcibios_scan_specific_bus(int busn); 644 extern struct pci_bus *pci_find_bus(int domain, int busnr); 645 void pci_bus_add_devices(const struct pci_bus *bus); 646 struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus, 647 struct pci_ops *ops, void *sysdata); 648 static inline struct pci_bus * __devinit pci_scan_bus(int bus, struct pci_ops *ops, 649 void *sysdata) 650 { 651 struct pci_bus *root_bus; 652 root_bus = pci_scan_bus_parented(NULL, bus, ops, sysdata); 653 if (root_bus) 654 pci_bus_add_devices(root_bus); 655 return root_bus; 656 } 657 struct pci_bus *pci_create_bus(struct device *parent, int bus, 658 struct pci_ops *ops, void *sysdata); 659 struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, 660 int busnr); 661 void pcie_update_link_speed(struct pci_bus *bus, u16 link_status); 662 struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr, 663 const char *name, 664 struct hotplug_slot *hotplug); 665 void pci_destroy_slot(struct pci_slot *slot); 666 void pci_renumber_slot(struct pci_slot *slot, int slot_nr); 667 int pci_scan_slot(struct pci_bus *bus, int devfn); 668 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn); 669 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus); 670 unsigned int pci_scan_child_bus(struct pci_bus *bus); 671 int __must_check pci_bus_add_device(struct pci_dev *dev); 672 void pci_read_bridge_bases(struct pci_bus *child); 673 struct resource *pci_find_parent_resource(const struct pci_dev *dev, 674 struct resource *res); 675 u8 pci_swizzle_interrupt_pin(struct pci_dev *dev, u8 pin); 676 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge); 677 u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp); 678 extern struct pci_dev *pci_dev_get(struct pci_dev *dev); 679 extern void pci_dev_put(struct pci_dev *dev); 680 extern void pci_remove_bus(struct pci_bus *b); 681 extern void pci_remove_bus_device(struct pci_dev *dev); 682 extern void pci_stop_bus_device(struct pci_dev *dev); 683 void pci_setup_cardbus(struct pci_bus *bus); 684 extern void pci_sort_breadthfirst(void); 685 #define dev_is_pci(d) ((d)->bus == &pci_bus_type) 686 #define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false)) 687 #define dev_num_vf(d) ((dev_is_pci(d) ? pci_num_vf(to_pci_dev(d)) : 0)) 688 689 /* Generic PCI functions exported to card drivers */ 690 691 enum pci_lost_interrupt_reason { 692 PCI_LOST_IRQ_NO_INFORMATION = 0, 693 PCI_LOST_IRQ_DISABLE_MSI, 694 PCI_LOST_IRQ_DISABLE_MSIX, 695 PCI_LOST_IRQ_DISABLE_ACPI, 696 }; 697 enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *dev); 698 int pci_find_capability(struct pci_dev *dev, int cap); 699 int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap); 700 int pci_find_ext_capability(struct pci_dev *dev, int cap); 701 int pci_bus_find_ext_capability(struct pci_bus *bus, unsigned int devfn, 702 int cap); 703 int pci_find_ht_capability(struct pci_dev *dev, int ht_cap); 704 int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap); 705 struct pci_bus *pci_find_next_bus(const struct pci_bus *from); 706 707 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device, 708 struct pci_dev *from); 709 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device, 710 unsigned int ss_vendor, unsigned int ss_device, 711 struct pci_dev *from); 712 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn); 713 struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus, 714 unsigned int devfn); 715 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus, 716 unsigned int devfn) 717 { 718 return pci_get_domain_bus_and_slot(0, bus, devfn); 719 } 720 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from); 721 int pci_dev_present(const struct pci_device_id *ids); 722 723 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn, 724 int where, u8 *val); 725 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn, 726 int where, u16 *val); 727 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn, 728 int where, u32 *val); 729 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn, 730 int where, u8 val); 731 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn, 732 int where, u16 val); 733 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn, 734 int where, u32 val); 735 struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops); 736 737 static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val) 738 { 739 return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val); 740 } 741 static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val) 742 { 743 return pci_bus_read_config_word(dev->bus, dev->devfn, where, val); 744 } 745 static inline int pci_read_config_dword(struct pci_dev *dev, int where, 746 u32 *val) 747 { 748 return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val); 749 } 750 static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val) 751 { 752 return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val); 753 } 754 static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val) 755 { 756 return pci_bus_write_config_word(dev->bus, dev->devfn, where, val); 757 } 758 static inline int pci_write_config_dword(struct pci_dev *dev, int where, 759 u32 val) 760 { 761 return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val); 762 } 763 764 int __must_check pci_enable_device(struct pci_dev *dev); 765 int __must_check pci_enable_device_io(struct pci_dev *dev); 766 int __must_check pci_enable_device_mem(struct pci_dev *dev); 767 int __must_check pci_reenable_device(struct pci_dev *); 768 int __must_check pcim_enable_device(struct pci_dev *pdev); 769 void pcim_pin_device(struct pci_dev *pdev); 770 771 static inline int pci_is_enabled(struct pci_dev *pdev) 772 { 773 return (atomic_read(&pdev->enable_cnt) > 0); 774 } 775 776 static inline int pci_is_managed(struct pci_dev *pdev) 777 { 778 return pdev->is_managed; 779 } 780 781 void pci_disable_device(struct pci_dev *dev); 782 void pci_set_master(struct pci_dev *dev); 783 void pci_clear_master(struct pci_dev *dev); 784 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state); 785 int pci_set_cacheline_size(struct pci_dev *dev); 786 #define HAVE_PCI_SET_MWI 787 int __must_check pci_set_mwi(struct pci_dev *dev); 788 int pci_try_set_mwi(struct pci_dev *dev); 789 void pci_clear_mwi(struct pci_dev *dev); 790 void pci_intx(struct pci_dev *dev, int enable); 791 void pci_msi_off(struct pci_dev *dev); 792 int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size); 793 int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask); 794 int pcix_get_max_mmrbc(struct pci_dev *dev); 795 int pcix_get_mmrbc(struct pci_dev *dev); 796 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc); 797 int pcie_get_readrq(struct pci_dev *dev); 798 int pcie_set_readrq(struct pci_dev *dev, int rq); 799 int __pci_reset_function(struct pci_dev *dev); 800 int pci_reset_function(struct pci_dev *dev); 801 void pci_update_resource(struct pci_dev *dev, int resno); 802 int __must_check pci_assign_resource(struct pci_dev *dev, int i); 803 int pci_select_bars(struct pci_dev *dev, unsigned long flags); 804 805 /* ROM control related routines */ 806 int pci_enable_rom(struct pci_dev *pdev); 807 void pci_disable_rom(struct pci_dev *pdev); 808 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size); 809 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom); 810 size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size); 811 812 /* Power management related routines */ 813 int pci_save_state(struct pci_dev *dev); 814 void pci_restore_state(struct pci_dev *dev); 815 struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev); 816 int pci_load_saved_state(struct pci_dev *dev, struct pci_saved_state *state); 817 int pci_load_and_free_saved_state(struct pci_dev *dev, 818 struct pci_saved_state **state); 819 int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state); 820 int pci_set_power_state(struct pci_dev *dev, pci_power_t state); 821 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state); 822 bool pci_pme_capable(struct pci_dev *dev, pci_power_t state); 823 void pci_pme_active(struct pci_dev *dev, bool enable); 824 int __pci_enable_wake(struct pci_dev *dev, pci_power_t state, 825 bool runtime, bool enable); 826 int pci_wake_from_d3(struct pci_dev *dev, bool enable); 827 pci_power_t pci_target_state(struct pci_dev *dev); 828 int pci_prepare_to_sleep(struct pci_dev *dev); 829 int pci_back_from_sleep(struct pci_dev *dev); 830 bool pci_dev_run_wake(struct pci_dev *dev); 831 bool pci_check_pme_status(struct pci_dev *dev); 832 void pci_pme_wakeup_bus(struct pci_bus *bus); 833 834 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state, 835 bool enable) 836 { 837 return __pci_enable_wake(dev, state, false, enable); 838 } 839 840 #define PCI_EXP_IDO_REQUEST (1<<0) 841 #define PCI_EXP_IDO_COMPLETION (1<<1) 842 void pci_enable_ido(struct pci_dev *dev, unsigned long type); 843 void pci_disable_ido(struct pci_dev *dev, unsigned long type); 844 845 enum pci_obff_signal_type { 846 PCI_EXP_OBFF_SIGNAL_L0, 847 PCI_EXP_OBFF_SIGNAL_ALWAYS, 848 }; 849 int pci_enable_obff(struct pci_dev *dev, enum pci_obff_signal_type); 850 void pci_disable_obff(struct pci_dev *dev); 851 852 bool pci_ltr_supported(struct pci_dev *dev); 853 int pci_enable_ltr(struct pci_dev *dev); 854 void pci_disable_ltr(struct pci_dev *dev); 855 int pci_set_ltr(struct pci_dev *dev, int snoop_lat_ns, int nosnoop_lat_ns); 856 857 /* For use by arch with custom probe code */ 858 void set_pcie_port_type(struct pci_dev *pdev); 859 void set_pcie_hotplug_bridge(struct pci_dev *pdev); 860 861 /* Functions for PCI Hotplug drivers to use */ 862 int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap); 863 #ifdef CONFIG_HOTPLUG 864 unsigned int pci_rescan_bus(struct pci_bus *bus); 865 #endif 866 867 /* Vital product data routines */ 868 ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf); 869 ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf); 870 int pci_vpd_truncate(struct pci_dev *dev, size_t size); 871 872 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */ 873 void pci_bus_assign_resources(const struct pci_bus *bus); 874 void pci_bus_size_bridges(struct pci_bus *bus); 875 int pci_claim_resource(struct pci_dev *, int); 876 void pci_assign_unassigned_resources(void); 877 void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge); 878 void pdev_enable_device(struct pci_dev *); 879 void pdev_sort_resources(struct pci_dev *, struct resource_list *); 880 int pci_enable_resources(struct pci_dev *, int mask); 881 void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *), 882 int (*)(struct pci_dev *, u8, u8)); 883 #define HAVE_PCI_REQ_REGIONS 2 884 int __must_check pci_request_regions(struct pci_dev *, const char *); 885 int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *); 886 void pci_release_regions(struct pci_dev *); 887 int __must_check pci_request_region(struct pci_dev *, int, const char *); 888 int __must_check pci_request_region_exclusive(struct pci_dev *, int, const char *); 889 void pci_release_region(struct pci_dev *, int); 890 int pci_request_selected_regions(struct pci_dev *, int, const char *); 891 int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *); 892 void pci_release_selected_regions(struct pci_dev *, int); 893 894 /* drivers/pci/bus.c */ 895 void pci_bus_add_resource(struct pci_bus *bus, struct resource *res, unsigned int flags); 896 struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n); 897 void pci_bus_remove_resources(struct pci_bus *bus); 898 899 #define pci_bus_for_each_resource(bus, res, i) \ 900 for (i = 0; \ 901 (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \ 902 i++) 903 904 int __must_check pci_bus_alloc_resource(struct pci_bus *bus, 905 struct resource *res, resource_size_t size, 906 resource_size_t align, resource_size_t min, 907 unsigned int type_mask, 908 resource_size_t (*alignf)(void *, 909 const struct resource *, 910 resource_size_t, 911 resource_size_t), 912 void *alignf_data); 913 void pci_enable_bridges(struct pci_bus *bus); 914 915 /* Proper probing supporting hot-pluggable devices */ 916 int __must_check __pci_register_driver(struct pci_driver *, struct module *, 917 const char *mod_name); 918 919 /* 920 * pci_register_driver must be a macro so that KBUILD_MODNAME can be expanded 921 */ 922 #define pci_register_driver(driver) \ 923 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME) 924 925 void pci_unregister_driver(struct pci_driver *dev); 926 void pci_remove_behind_bridge(struct pci_dev *dev); 927 struct pci_driver *pci_dev_driver(const struct pci_dev *dev); 928 int pci_add_dynid(struct pci_driver *drv, 929 unsigned int vendor, unsigned int device, 930 unsigned int subvendor, unsigned int subdevice, 931 unsigned int class, unsigned int class_mask, 932 unsigned long driver_data); 933 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, 934 struct pci_dev *dev); 935 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, 936 int pass); 937 938 void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *), 939 void *userdata); 940 int pci_cfg_space_size_ext(struct pci_dev *dev); 941 int pci_cfg_space_size(struct pci_dev *dev); 942 unsigned char pci_bus_max_busnr(struct pci_bus *bus); 943 944 int pci_set_vga_state(struct pci_dev *pdev, bool decode, 945 unsigned int command_bits, bool change_bridge); 946 /* kmem_cache style wrapper around pci_alloc_consistent() */ 947 948 #include <linux/pci-dma.h> 949 #include <linux/dmapool.h> 950 951 #define pci_pool dma_pool 952 #define pci_pool_create(name, pdev, size, align, allocation) \ 953 dma_pool_create(name, &pdev->dev, size, align, allocation) 954 #define pci_pool_destroy(pool) dma_pool_destroy(pool) 955 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle) 956 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr) 957 958 enum pci_dma_burst_strategy { 959 PCI_DMA_BURST_INFINITY, /* make bursts as large as possible, 960 strategy_parameter is N/A */ 961 PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter 962 byte boundaries */ 963 PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of 964 strategy_parameter byte boundaries */ 965 }; 966 967 struct msix_entry { 968 u32 vector; /* kernel uses to write allocated vector */ 969 u16 entry; /* driver uses to specify entry, OS writes */ 970 }; 971 972 973 #ifndef CONFIG_PCI_MSI 974 static inline int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec) 975 { 976 return -1; 977 } 978 979 static inline void pci_msi_shutdown(struct pci_dev *dev) 980 { } 981 static inline void pci_disable_msi(struct pci_dev *dev) 982 { } 983 984 static inline int pci_msix_table_size(struct pci_dev *dev) 985 { 986 return 0; 987 } 988 static inline int pci_enable_msix(struct pci_dev *dev, 989 struct msix_entry *entries, int nvec) 990 { 991 return -1; 992 } 993 994 static inline void pci_msix_shutdown(struct pci_dev *dev) 995 { } 996 static inline void pci_disable_msix(struct pci_dev *dev) 997 { } 998 999 static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev) 1000 { } 1001 1002 static inline void pci_restore_msi_state(struct pci_dev *dev) 1003 { } 1004 static inline int pci_msi_enabled(void) 1005 { 1006 return 0; 1007 } 1008 #else 1009 extern int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec); 1010 extern void pci_msi_shutdown(struct pci_dev *dev); 1011 extern void pci_disable_msi(struct pci_dev *dev); 1012 extern int pci_msix_table_size(struct pci_dev *dev); 1013 extern int pci_enable_msix(struct pci_dev *dev, 1014 struct msix_entry *entries, int nvec); 1015 extern void pci_msix_shutdown(struct pci_dev *dev); 1016 extern void pci_disable_msix(struct pci_dev *dev); 1017 extern void msi_remove_pci_irq_vectors(struct pci_dev *dev); 1018 extern void pci_restore_msi_state(struct pci_dev *dev); 1019 extern int pci_msi_enabled(void); 1020 #endif 1021 1022 #ifdef CONFIG_PCIEPORTBUS 1023 extern bool pcie_ports_disabled; 1024 extern bool pcie_ports_auto; 1025 #else 1026 #define pcie_ports_disabled true 1027 #define pcie_ports_auto false 1028 #endif 1029 1030 #ifndef CONFIG_PCIEASPM 1031 static inline int pcie_aspm_enabled(void) { return 0; } 1032 static inline bool pcie_aspm_support_enabled(void) { return false; } 1033 #else 1034 extern int pcie_aspm_enabled(void); 1035 extern bool pcie_aspm_support_enabled(void); 1036 #endif 1037 1038 #ifdef CONFIG_PCIEAER 1039 void pci_no_aer(void); 1040 bool pci_aer_available(void); 1041 #else 1042 static inline void pci_no_aer(void) { } 1043 static inline bool pci_aer_available(void) { return false; } 1044 #endif 1045 1046 #ifndef CONFIG_PCIE_ECRC 1047 static inline void pcie_set_ecrc_checking(struct pci_dev *dev) 1048 { 1049 return; 1050 } 1051 static inline void pcie_ecrc_get_policy(char *str) {}; 1052 #else 1053 extern void pcie_set_ecrc_checking(struct pci_dev *dev); 1054 extern void pcie_ecrc_get_policy(char *str); 1055 #endif 1056 1057 #define pci_enable_msi(pdev) pci_enable_msi_block(pdev, 1) 1058 1059 #ifdef CONFIG_HT_IRQ 1060 /* The functions a driver should call */ 1061 int ht_create_irq(struct pci_dev *dev, int idx); 1062 void ht_destroy_irq(unsigned int irq); 1063 #endif /* CONFIG_HT_IRQ */ 1064 1065 extern void pci_block_user_cfg_access(struct pci_dev *dev); 1066 extern void pci_unblock_user_cfg_access(struct pci_dev *dev); 1067 1068 /* 1069 * PCI domain support. Sometimes called PCI segment (eg by ACPI), 1070 * a PCI domain is defined to be a set of PCI busses which share 1071 * configuration space. 1072 */ 1073 #ifdef CONFIG_PCI_DOMAINS 1074 extern int pci_domains_supported; 1075 #else 1076 enum { pci_domains_supported = 0 }; 1077 static inline int pci_domain_nr(struct pci_bus *bus) 1078 { 1079 return 0; 1080 } 1081 1082 static inline int pci_proc_domain(struct pci_bus *bus) 1083 { 1084 return 0; 1085 } 1086 #endif /* CONFIG_PCI_DOMAINS */ 1087 1088 /* some architectures require additional setup to direct VGA traffic */ 1089 typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode, 1090 unsigned int command_bits, bool change_bridge); 1091 extern void pci_register_set_vga_state(arch_set_vga_state_t func); 1092 1093 #else /* CONFIG_PCI is not enabled */ 1094 1095 /* 1096 * If the system does not have PCI, clearly these return errors. Define 1097 * these as simple inline functions to avoid hair in drivers. 1098 */ 1099 1100 #define _PCI_NOP(o, s, t) \ 1101 static inline int pci_##o##_config_##s(struct pci_dev *dev, \ 1102 int where, t val) \ 1103 { return PCIBIOS_FUNC_NOT_SUPPORTED; } 1104 1105 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \ 1106 _PCI_NOP(o, word, u16 x) \ 1107 _PCI_NOP(o, dword, u32 x) 1108 _PCI_NOP_ALL(read, *) 1109 _PCI_NOP_ALL(write,) 1110 1111 static inline struct pci_dev *pci_get_device(unsigned int vendor, 1112 unsigned int device, 1113 struct pci_dev *from) 1114 { 1115 return NULL; 1116 } 1117 1118 static inline struct pci_dev *pci_get_subsys(unsigned int vendor, 1119 unsigned int device, 1120 unsigned int ss_vendor, 1121 unsigned int ss_device, 1122 struct pci_dev *from) 1123 { 1124 return NULL; 1125 } 1126 1127 static inline struct pci_dev *pci_get_class(unsigned int class, 1128 struct pci_dev *from) 1129 { 1130 return NULL; 1131 } 1132 1133 #define pci_dev_present(ids) (0) 1134 #define no_pci_devices() (1) 1135 #define pci_dev_put(dev) do { } while (0) 1136 1137 static inline void pci_set_master(struct pci_dev *dev) 1138 { } 1139 1140 static inline int pci_enable_device(struct pci_dev *dev) 1141 { 1142 return -EIO; 1143 } 1144 1145 static inline void pci_disable_device(struct pci_dev *dev) 1146 { } 1147 1148 static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask) 1149 { 1150 return -EIO; 1151 } 1152 1153 static inline int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask) 1154 { 1155 return -EIO; 1156 } 1157 1158 static inline int pci_set_dma_max_seg_size(struct pci_dev *dev, 1159 unsigned int size) 1160 { 1161 return -EIO; 1162 } 1163 1164 static inline int pci_set_dma_seg_boundary(struct pci_dev *dev, 1165 unsigned long mask) 1166 { 1167 return -EIO; 1168 } 1169 1170 static inline int pci_assign_resource(struct pci_dev *dev, int i) 1171 { 1172 return -EBUSY; 1173 } 1174 1175 static inline int __pci_register_driver(struct pci_driver *drv, 1176 struct module *owner) 1177 { 1178 return 0; 1179 } 1180 1181 static inline int pci_register_driver(struct pci_driver *drv) 1182 { 1183 return 0; 1184 } 1185 1186 static inline void pci_unregister_driver(struct pci_driver *drv) 1187 { } 1188 1189 static inline int pci_find_capability(struct pci_dev *dev, int cap) 1190 { 1191 return 0; 1192 } 1193 1194 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post, 1195 int cap) 1196 { 1197 return 0; 1198 } 1199 1200 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap) 1201 { 1202 return 0; 1203 } 1204 1205 /* Power management related routines */ 1206 static inline int pci_save_state(struct pci_dev *dev) 1207 { 1208 return 0; 1209 } 1210 1211 static inline void pci_restore_state(struct pci_dev *dev) 1212 { } 1213 1214 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state) 1215 { 1216 return 0; 1217 } 1218 1219 static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable) 1220 { 1221 return 0; 1222 } 1223 1224 static inline pci_power_t pci_choose_state(struct pci_dev *dev, 1225 pm_message_t state) 1226 { 1227 return PCI_D0; 1228 } 1229 1230 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state, 1231 int enable) 1232 { 1233 return 0; 1234 } 1235 1236 static inline void pci_enable_ido(struct pci_dev *dev, unsigned long type) 1237 { 1238 } 1239 1240 static inline void pci_disable_ido(struct pci_dev *dev, unsigned long type) 1241 { 1242 } 1243 1244 static inline int pci_enable_obff(struct pci_dev *dev, unsigned long type) 1245 { 1246 return 0; 1247 } 1248 1249 static inline void pci_disable_obff(struct pci_dev *dev) 1250 { 1251 } 1252 1253 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name) 1254 { 1255 return -EIO; 1256 } 1257 1258 static inline void pci_release_regions(struct pci_dev *dev) 1259 { } 1260 1261 #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0) 1262 1263 static inline void pci_block_user_cfg_access(struct pci_dev *dev) 1264 { } 1265 1266 static inline void pci_unblock_user_cfg_access(struct pci_dev *dev) 1267 { } 1268 1269 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from) 1270 { return NULL; } 1271 1272 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus, 1273 unsigned int devfn) 1274 { return NULL; } 1275 1276 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus, 1277 unsigned int devfn) 1278 { return NULL; } 1279 1280 static inline int pci_domain_nr(struct pci_bus *bus) 1281 { return 0; } 1282 1283 #define dev_is_pci(d) (false) 1284 #define dev_is_pf(d) (false) 1285 #define dev_num_vf(d) (0) 1286 #endif /* CONFIG_PCI */ 1287 1288 /* Include architecture-dependent settings and functions */ 1289 1290 #include <asm/pci.h> 1291 1292 #ifndef PCIBIOS_MAX_MEM_32 1293 #define PCIBIOS_MAX_MEM_32 (-1) 1294 #endif 1295 1296 /* these helpers provide future and backwards compatibility 1297 * for accessing popular PCI BAR info */ 1298 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start) 1299 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end) 1300 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags) 1301 #define pci_resource_len(dev,bar) \ 1302 ((pci_resource_start((dev), (bar)) == 0 && \ 1303 pci_resource_end((dev), (bar)) == \ 1304 pci_resource_start((dev), (bar))) ? 0 : \ 1305 \ 1306 (pci_resource_end((dev), (bar)) - \ 1307 pci_resource_start((dev), (bar)) + 1)) 1308 1309 /* Similar to the helpers above, these manipulate per-pci_dev 1310 * driver-specific data. They are really just a wrapper around 1311 * the generic device structure functions of these calls. 1312 */ 1313 static inline void *pci_get_drvdata(struct pci_dev *pdev) 1314 { 1315 return dev_get_drvdata(&pdev->dev); 1316 } 1317 1318 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data) 1319 { 1320 dev_set_drvdata(&pdev->dev, data); 1321 } 1322 1323 /* If you want to know what to call your pci_dev, ask this function. 1324 * Again, it's a wrapper around the generic device. 1325 */ 1326 static inline const char *pci_name(const struct pci_dev *pdev) 1327 { 1328 return dev_name(&pdev->dev); 1329 } 1330 1331 1332 /* Some archs don't want to expose struct resource to userland as-is 1333 * in sysfs and /proc 1334 */ 1335 #ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER 1336 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar, 1337 const struct resource *rsrc, resource_size_t *start, 1338 resource_size_t *end) 1339 { 1340 *start = rsrc->start; 1341 *end = rsrc->end; 1342 } 1343 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */ 1344 1345 1346 /* 1347 * The world is not perfect and supplies us with broken PCI devices. 1348 * For at least a part of these bugs we need a work-around, so both 1349 * generic (drivers/pci/quirks.c) and per-architecture code can define 1350 * fixup hooks to be called for particular buggy devices. 1351 */ 1352 1353 struct pci_fixup { 1354 u16 vendor, device; /* You can use PCI_ANY_ID here of course */ 1355 void (*hook)(struct pci_dev *dev); 1356 }; 1357 1358 enum pci_fixup_pass { 1359 pci_fixup_early, /* Before probing BARs */ 1360 pci_fixup_header, /* After reading configuration header */ 1361 pci_fixup_final, /* Final phase of device fixups */ 1362 pci_fixup_enable, /* pci_enable_device() time */ 1363 pci_fixup_resume, /* pci_device_resume() */ 1364 pci_fixup_suspend, /* pci_device_suspend */ 1365 pci_fixup_resume_early, /* pci_device_resume_early() */ 1366 }; 1367 1368 /* Anonymous variables would be nice... */ 1369 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook) \ 1370 static const struct pci_fixup __pci_fixup_##name __used \ 1371 __attribute__((__section__(#section))) = { vendor, device, hook }; 1372 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \ 1373 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \ 1374 vendor##device##hook, vendor, device, hook) 1375 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \ 1376 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \ 1377 vendor##device##hook, vendor, device, hook) 1378 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \ 1379 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \ 1380 vendor##device##hook, vendor, device, hook) 1381 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \ 1382 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \ 1383 vendor##device##hook, vendor, device, hook) 1384 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \ 1385 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \ 1386 resume##vendor##device##hook, vendor, device, hook) 1387 #define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \ 1388 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \ 1389 resume_early##vendor##device##hook, vendor, device, hook) 1390 #define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \ 1391 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \ 1392 suspend##vendor##device##hook, vendor, device, hook) 1393 1394 #ifdef CONFIG_PCI_QUIRKS 1395 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev); 1396 #else 1397 static inline void pci_fixup_device(enum pci_fixup_pass pass, 1398 struct pci_dev *dev) {} 1399 #endif 1400 1401 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen); 1402 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr); 1403 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev); 1404 int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name); 1405 int pcim_iomap_regions_request_all(struct pci_dev *pdev, u16 mask, 1406 const char *name); 1407 void pcim_iounmap_regions(struct pci_dev *pdev, u16 mask); 1408 1409 extern int pci_pci_problems; 1410 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */ 1411 #define PCIPCI_TRITON 2 1412 #define PCIPCI_NATOMA 4 1413 #define PCIPCI_VIAETBF 8 1414 #define PCIPCI_VSFX 16 1415 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */ 1416 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */ 1417 1418 extern unsigned long pci_cardbus_io_size; 1419 extern unsigned long pci_cardbus_mem_size; 1420 extern u8 __devinitdata pci_dfl_cache_line_size; 1421 extern u8 pci_cache_line_size; 1422 1423 extern unsigned long pci_hotplug_io_size; 1424 extern unsigned long pci_hotplug_mem_size; 1425 1426 int pcibios_add_platform_entries(struct pci_dev *dev); 1427 void pcibios_disable_device(struct pci_dev *dev); 1428 int pcibios_set_pcie_reset_state(struct pci_dev *dev, 1429 enum pcie_reset_state state); 1430 1431 #ifdef CONFIG_PCI_MMCONFIG 1432 extern void __init pci_mmcfg_early_init(void); 1433 extern void __init pci_mmcfg_late_init(void); 1434 #else 1435 static inline void pci_mmcfg_early_init(void) { } 1436 static inline void pci_mmcfg_late_init(void) { } 1437 #endif 1438 1439 int pci_ext_cfg_avail(struct pci_dev *dev); 1440 1441 void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar); 1442 1443 #ifdef CONFIG_PCI_IOV 1444 extern int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn); 1445 extern void pci_disable_sriov(struct pci_dev *dev); 1446 extern irqreturn_t pci_sriov_migration(struct pci_dev *dev); 1447 extern int pci_num_vf(struct pci_dev *dev); 1448 #else 1449 static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn) 1450 { 1451 return -ENODEV; 1452 } 1453 static inline void pci_disable_sriov(struct pci_dev *dev) 1454 { 1455 } 1456 static inline irqreturn_t pci_sriov_migration(struct pci_dev *dev) 1457 { 1458 return IRQ_NONE; 1459 } 1460 static inline int pci_num_vf(struct pci_dev *dev) 1461 { 1462 return 0; 1463 } 1464 #endif 1465 1466 #if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE) 1467 extern void pci_hp_create_module_link(struct pci_slot *pci_slot); 1468 extern void pci_hp_remove_module_link(struct pci_slot *pci_slot); 1469 #endif 1470 1471 /** 1472 * pci_pcie_cap - get the saved PCIe capability offset 1473 * @dev: PCI device 1474 * 1475 * PCIe capability offset is calculated at PCI device initialization 1476 * time and saved in the data structure. This function returns saved 1477 * PCIe capability offset. Using this instead of pci_find_capability() 1478 * reduces unnecessary search in the PCI configuration space. If you 1479 * need to calculate PCIe capability offset from raw device for some 1480 * reasons, please use pci_find_capability() instead. 1481 */ 1482 static inline int pci_pcie_cap(struct pci_dev *dev) 1483 { 1484 return dev->pcie_cap; 1485 } 1486 1487 /** 1488 * pci_is_pcie - check if the PCI device is PCI Express capable 1489 * @dev: PCI device 1490 * 1491 * Retrun true if the PCI device is PCI Express capable, false otherwise. 1492 */ 1493 static inline bool pci_is_pcie(struct pci_dev *dev) 1494 { 1495 return !!pci_pcie_cap(dev); 1496 } 1497 1498 void pci_request_acs(void); 1499 1500 1501 #define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */ 1502 #define PCI_VPD_LRDT_ID(x) (x | PCI_VPD_LRDT) 1503 1504 /* Large Resource Data Type Tag Item Names */ 1505 #define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */ 1506 #define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */ 1507 #define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */ 1508 1509 #define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING) 1510 #define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA) 1511 #define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA) 1512 1513 /* Small Resource Data Type Tag Item Names */ 1514 #define PCI_VPD_STIN_END 0x78 /* End */ 1515 1516 #define PCI_VPD_SRDT_END PCI_VPD_STIN_END 1517 1518 #define PCI_VPD_SRDT_TIN_MASK 0x78 1519 #define PCI_VPD_SRDT_LEN_MASK 0x07 1520 1521 #define PCI_VPD_LRDT_TAG_SIZE 3 1522 #define PCI_VPD_SRDT_TAG_SIZE 1 1523 1524 #define PCI_VPD_INFO_FLD_HDR_SIZE 3 1525 1526 #define PCI_VPD_RO_KEYWORD_PARTNO "PN" 1527 #define PCI_VPD_RO_KEYWORD_MFR_ID "MN" 1528 #define PCI_VPD_RO_KEYWORD_VENDOR0 "V0" 1529 #define PCI_VPD_RO_KEYWORD_CHKSUM "RV" 1530 1531 /** 1532 * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length 1533 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag 1534 * 1535 * Returns the extracted Large Resource Data Type length. 1536 */ 1537 static inline u16 pci_vpd_lrdt_size(const u8 *lrdt) 1538 { 1539 return (u16)lrdt[1] + ((u16)lrdt[2] << 8); 1540 } 1541 1542 /** 1543 * pci_vpd_srdt_size - Extracts the Small Resource Data Type length 1544 * @lrdt: Pointer to the beginning of the Small Resource Data Type tag 1545 * 1546 * Returns the extracted Small Resource Data Type length. 1547 */ 1548 static inline u8 pci_vpd_srdt_size(const u8 *srdt) 1549 { 1550 return (*srdt) & PCI_VPD_SRDT_LEN_MASK; 1551 } 1552 1553 /** 1554 * pci_vpd_info_field_size - Extracts the information field length 1555 * @lrdt: Pointer to the beginning of an information field header 1556 * 1557 * Returns the extracted information field length. 1558 */ 1559 static inline u8 pci_vpd_info_field_size(const u8 *info_field) 1560 { 1561 return info_field[2]; 1562 } 1563 1564 /** 1565 * pci_vpd_find_tag - Locates the Resource Data Type tag provided 1566 * @buf: Pointer to buffered vpd data 1567 * @off: The offset into the buffer at which to begin the search 1568 * @len: The length of the vpd buffer 1569 * @rdt: The Resource Data Type to search for 1570 * 1571 * Returns the index where the Resource Data Type was found or 1572 * -ENOENT otherwise. 1573 */ 1574 int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt); 1575 1576 /** 1577 * pci_vpd_find_info_keyword - Locates an information field keyword in the VPD 1578 * @buf: Pointer to buffered vpd data 1579 * @off: The offset into the buffer at which to begin the search 1580 * @len: The length of the buffer area, relative to off, in which to search 1581 * @kw: The keyword to search for 1582 * 1583 * Returns the index where the information field keyword was found or 1584 * -ENOENT otherwise. 1585 */ 1586 int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off, 1587 unsigned int len, const char *kw); 1588 1589 #endif /* __KERNEL__ */ 1590 #endif /* LINUX_PCI_H */ 1591