1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * pci.h 4 * 5 * PCI defines and function prototypes 6 * Copyright 1994, Drew Eckhardt 7 * Copyright 1997--1999 Martin Mares <[email protected]> 8 * 9 * For more information, please consult the following manuals (look at 10 * http://www.pcisig.com/ for how to get them): 11 * 12 * PCI BIOS Specification 13 * PCI Local Bus Specification 14 * PCI to PCI Bridge Specification 15 * PCI System Design Guide 16 */ 17 #ifndef LINUX_PCI_H 18 #define LINUX_PCI_H 19 20 21 #include <linux/mod_devicetable.h> 22 23 #include <linux/types.h> 24 #include <linux/init.h> 25 #include <linux/ioport.h> 26 #include <linux/list.h> 27 #include <linux/compiler.h> 28 #include <linux/errno.h> 29 #include <linux/kobject.h> 30 #include <linux/atomic.h> 31 #include <linux/device.h> 32 #include <linux/interrupt.h> 33 #include <linux/io.h> 34 #include <linux/resource_ext.h> 35 #include <uapi/linux/pci.h> 36 37 #include <linux/pci_ids.h> 38 39 /* 40 * The PCI interface treats multi-function devices as independent 41 * devices. The slot/function address of each device is encoded 42 * in a single byte as follows: 43 * 44 * 7:3 = slot 45 * 2:0 = function 46 * 47 * PCI_DEVFN(), PCI_SLOT(), and PCI_FUNC() are defined in uapi/linux/pci.h. 48 * In the interest of not exposing interfaces to user-space unnecessarily, 49 * the following kernel-only defines are being added here. 50 */ 51 #define PCI_DEVID(bus, devfn) ((((u16)(bus)) << 8) | (devfn)) 52 /* return bus from PCI devid = ((u16)bus_number) << 8) | devfn */ 53 #define PCI_BUS_NUM(x) (((x) >> 8) & 0xff) 54 55 /* pci_slot represents a physical slot */ 56 struct pci_slot { 57 struct pci_bus *bus; /* Bus this slot is on */ 58 struct list_head list; /* Node in list of slots */ 59 struct hotplug_slot *hotplug; /* Hotplug info (move here) */ 60 unsigned char number; /* PCI_SLOT(pci_dev->devfn) */ 61 struct kobject kobj; 62 }; 63 64 static inline const char *pci_slot_name(const struct pci_slot *slot) 65 { 66 return kobject_name(&slot->kobj); 67 } 68 69 /* File state for mmap()s on /proc/bus/pci/X/Y */ 70 enum pci_mmap_state { 71 pci_mmap_io, 72 pci_mmap_mem 73 }; 74 75 /* For PCI devices, the region numbers are assigned this way: */ 76 enum { 77 /* #0-5: standard PCI resources */ 78 PCI_STD_RESOURCES, 79 PCI_STD_RESOURCE_END = 5, 80 81 /* #6: expansion ROM resource */ 82 PCI_ROM_RESOURCE, 83 84 /* Device-specific resources */ 85 #ifdef CONFIG_PCI_IOV 86 PCI_IOV_RESOURCES, 87 PCI_IOV_RESOURCE_END = PCI_IOV_RESOURCES + PCI_SRIOV_NUM_BARS - 1, 88 #endif 89 90 /* Resources assigned to buses behind the bridge */ 91 #define PCI_BRIDGE_RESOURCE_NUM 4 92 93 PCI_BRIDGE_RESOURCES, 94 PCI_BRIDGE_RESOURCE_END = PCI_BRIDGE_RESOURCES + 95 PCI_BRIDGE_RESOURCE_NUM - 1, 96 97 /* Total resources associated with a PCI device */ 98 PCI_NUM_RESOURCES, 99 100 /* Preserve this for compatibility */ 101 DEVICE_COUNT_RESOURCE = PCI_NUM_RESOURCES, 102 }; 103 104 /** 105 * enum pci_interrupt_pin - PCI INTx interrupt values 106 * @PCI_INTERRUPT_UNKNOWN: Unknown or unassigned interrupt 107 * @PCI_INTERRUPT_INTA: PCI INTA pin 108 * @PCI_INTERRUPT_INTB: PCI INTB pin 109 * @PCI_INTERRUPT_INTC: PCI INTC pin 110 * @PCI_INTERRUPT_INTD: PCI INTD pin 111 * 112 * Corresponds to values for legacy PCI INTx interrupts, as can be found in the 113 * PCI_INTERRUPT_PIN register. 114 */ 115 enum pci_interrupt_pin { 116 PCI_INTERRUPT_UNKNOWN, 117 PCI_INTERRUPT_INTA, 118 PCI_INTERRUPT_INTB, 119 PCI_INTERRUPT_INTC, 120 PCI_INTERRUPT_INTD, 121 }; 122 123 /* The number of legacy PCI INTx interrupts */ 124 #define PCI_NUM_INTX 4 125 126 /* 127 * pci_power_t values must match the bits in the Capabilities PME_Support 128 * and Control/Status PowerState fields in the Power Management capability. 129 */ 130 typedef int __bitwise pci_power_t; 131 132 #define PCI_D0 ((pci_power_t __force) 0) 133 #define PCI_D1 ((pci_power_t __force) 1) 134 #define PCI_D2 ((pci_power_t __force) 2) 135 #define PCI_D3hot ((pci_power_t __force) 3) 136 #define PCI_D3cold ((pci_power_t __force) 4) 137 #define PCI_UNKNOWN ((pci_power_t __force) 5) 138 #define PCI_POWER_ERROR ((pci_power_t __force) -1) 139 140 /* Remember to update this when the list above changes! */ 141 extern const char *pci_power_names[]; 142 143 static inline const char *pci_power_name(pci_power_t state) 144 { 145 return pci_power_names[1 + (__force int) state]; 146 } 147 148 #define PCI_PM_D2_DELAY 200 149 #define PCI_PM_D3_WAIT 10 150 #define PCI_PM_D3COLD_WAIT 100 151 #define PCI_PM_BUS_WAIT 50 152 153 /** 154 * The pci_channel state describes connectivity between the CPU and 155 * the PCI device. If some PCI bus between here and the PCI device 156 * has crashed or locked up, this info is reflected here. 157 */ 158 typedef unsigned int __bitwise pci_channel_state_t; 159 160 enum pci_channel_state { 161 /* I/O channel is in normal state */ 162 pci_channel_io_normal = (__force pci_channel_state_t) 1, 163 164 /* I/O to channel is blocked */ 165 pci_channel_io_frozen = (__force pci_channel_state_t) 2, 166 167 /* PCI card is dead */ 168 pci_channel_io_perm_failure = (__force pci_channel_state_t) 3, 169 }; 170 171 typedef unsigned int __bitwise pcie_reset_state_t; 172 173 enum pcie_reset_state { 174 /* Reset is NOT asserted (Use to deassert reset) */ 175 pcie_deassert_reset = (__force pcie_reset_state_t) 1, 176 177 /* Use #PERST to reset PCIe device */ 178 pcie_warm_reset = (__force pcie_reset_state_t) 2, 179 180 /* Use PCIe Hot Reset to reset device */ 181 pcie_hot_reset = (__force pcie_reset_state_t) 3 182 }; 183 184 typedef unsigned short __bitwise pci_dev_flags_t; 185 enum pci_dev_flags { 186 /* INTX_DISABLE in PCI_COMMAND register disables MSI too */ 187 PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) (1 << 0), 188 /* Device configuration is irrevocably lost if disabled into D3 */ 189 PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) (1 << 1), 190 /* Provide indication device is assigned by a Virtual Machine Manager */ 191 PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) (1 << 2), 192 /* Flag for quirk use to store if quirk-specific ACS is enabled */ 193 PCI_DEV_FLAGS_ACS_ENABLED_QUIRK = (__force pci_dev_flags_t) (1 << 3), 194 /* Use a PCIe-to-PCI bridge alias even if !pci_is_pcie */ 195 PCI_DEV_FLAG_PCIE_BRIDGE_ALIAS = (__force pci_dev_flags_t) (1 << 5), 196 /* Do not use bus resets for device */ 197 PCI_DEV_FLAGS_NO_BUS_RESET = (__force pci_dev_flags_t) (1 << 6), 198 /* Do not use PM reset even if device advertises NoSoftRst- */ 199 PCI_DEV_FLAGS_NO_PM_RESET = (__force pci_dev_flags_t) (1 << 7), 200 /* Get VPD from function 0 VPD */ 201 PCI_DEV_FLAGS_VPD_REF_F0 = (__force pci_dev_flags_t) (1 << 8), 202 /* A non-root bridge where translation occurs, stop alias search here */ 203 PCI_DEV_FLAGS_BRIDGE_XLATE_ROOT = (__force pci_dev_flags_t) (1 << 9), 204 /* Do not use FLR even if device advertises PCI_AF_CAP */ 205 PCI_DEV_FLAGS_NO_FLR_RESET = (__force pci_dev_flags_t) (1 << 10), 206 /* Don't use Relaxed Ordering for TLPs directed at this device */ 207 PCI_DEV_FLAGS_NO_RELAXED_ORDERING = (__force pci_dev_flags_t) (1 << 11), 208 }; 209 210 enum pci_irq_reroute_variant { 211 INTEL_IRQ_REROUTE_VARIANT = 1, 212 MAX_IRQ_REROUTE_VARIANTS = 3 213 }; 214 215 typedef unsigned short __bitwise pci_bus_flags_t; 216 enum pci_bus_flags { 217 PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1, 218 PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2, 219 PCI_BUS_FLAGS_NO_AERSID = (__force pci_bus_flags_t) 4, 220 }; 221 222 /* Values from Link Status register, PCIe r3.1, sec 7.8.8 */ 223 enum pcie_link_width { 224 PCIE_LNK_WIDTH_RESRV = 0x00, 225 PCIE_LNK_X1 = 0x01, 226 PCIE_LNK_X2 = 0x02, 227 PCIE_LNK_X4 = 0x04, 228 PCIE_LNK_X8 = 0x08, 229 PCIE_LNK_X12 = 0x0c, 230 PCIE_LNK_X16 = 0x10, 231 PCIE_LNK_X32 = 0x20, 232 PCIE_LNK_WIDTH_UNKNOWN = 0xff, 233 }; 234 235 /* Based on the PCI Hotplug Spec, but some values are made up by us */ 236 enum pci_bus_speed { 237 PCI_SPEED_33MHz = 0x00, 238 PCI_SPEED_66MHz = 0x01, 239 PCI_SPEED_66MHz_PCIX = 0x02, 240 PCI_SPEED_100MHz_PCIX = 0x03, 241 PCI_SPEED_133MHz_PCIX = 0x04, 242 PCI_SPEED_66MHz_PCIX_ECC = 0x05, 243 PCI_SPEED_100MHz_PCIX_ECC = 0x06, 244 PCI_SPEED_133MHz_PCIX_ECC = 0x07, 245 PCI_SPEED_66MHz_PCIX_266 = 0x09, 246 PCI_SPEED_100MHz_PCIX_266 = 0x0a, 247 PCI_SPEED_133MHz_PCIX_266 = 0x0b, 248 AGP_UNKNOWN = 0x0c, 249 AGP_1X = 0x0d, 250 AGP_2X = 0x0e, 251 AGP_4X = 0x0f, 252 AGP_8X = 0x10, 253 PCI_SPEED_66MHz_PCIX_533 = 0x11, 254 PCI_SPEED_100MHz_PCIX_533 = 0x12, 255 PCI_SPEED_133MHz_PCIX_533 = 0x13, 256 PCIE_SPEED_2_5GT = 0x14, 257 PCIE_SPEED_5_0GT = 0x15, 258 PCIE_SPEED_8_0GT = 0x16, 259 PCI_SPEED_UNKNOWN = 0xff, 260 }; 261 262 struct pci_cap_saved_data { 263 u16 cap_nr; 264 bool cap_extended; 265 unsigned int size; 266 u32 data[0]; 267 }; 268 269 struct pci_cap_saved_state { 270 struct hlist_node next; 271 struct pci_cap_saved_data cap; 272 }; 273 274 struct irq_affinity; 275 struct pcie_link_state; 276 struct pci_vpd; 277 struct pci_sriov; 278 struct pci_ats; 279 280 /* The pci_dev structure describes PCI devices */ 281 struct pci_dev { 282 struct list_head bus_list; /* Node in per-bus list */ 283 struct pci_bus *bus; /* Bus this device is on */ 284 struct pci_bus *subordinate; /* Bus this device bridges to */ 285 286 void *sysdata; /* Hook for sys-specific extension */ 287 struct proc_dir_entry *procent; /* Device entry in /proc/bus/pci */ 288 struct pci_slot *slot; /* Physical slot this device is in */ 289 290 unsigned int devfn; /* Encoded device & function index */ 291 unsigned short vendor; 292 unsigned short device; 293 unsigned short subsystem_vendor; 294 unsigned short subsystem_device; 295 unsigned int class; /* 3 bytes: (base,sub,prog-if) */ 296 u8 revision; /* PCI revision, low byte of class word */ 297 u8 hdr_type; /* PCI header type (`multi' flag masked out) */ 298 #ifdef CONFIG_PCIEAER 299 u16 aer_cap; /* AER capability offset */ 300 #endif 301 u8 pcie_cap; /* PCIe capability offset */ 302 u8 msi_cap; /* MSI capability offset */ 303 u8 msix_cap; /* MSI-X capability offset */ 304 u8 pcie_mpss:3; /* PCIe Max Payload Size Supported */ 305 u8 rom_base_reg; /* Config register controlling ROM */ 306 u8 pin; /* Interrupt pin this device uses */ 307 u16 pcie_flags_reg; /* Cached PCIe Capabilities Register */ 308 unsigned long *dma_alias_mask;/* Mask of enabled devfn aliases */ 309 310 struct pci_driver *driver; /* Driver bound to this device */ 311 u64 dma_mask; /* Mask of the bits of bus address this 312 device implements. Normally this is 313 0xffffffff. You only need to change 314 this if your device has broken DMA 315 or supports 64-bit transfers. */ 316 317 struct device_dma_parameters dma_parms; 318 319 pci_power_t current_state; /* Current operating state. In ACPI, 320 this is D0-D3, D0 being fully 321 functional, and D3 being off. */ 322 u8 pm_cap; /* PM capability offset */ 323 unsigned int pme_support:5; /* Bitmask of states from which PME# 324 can be generated */ 325 unsigned int pme_poll:1; /* Poll device's PME status bit */ 326 unsigned int d1_support:1; /* Low power state D1 is supported */ 327 unsigned int d2_support:1; /* Low power state D2 is supported */ 328 unsigned int no_d1d2:1; /* D1 and D2 are forbidden */ 329 unsigned int no_d3cold:1; /* D3cold is forbidden */ 330 unsigned int bridge_d3:1; /* Allow D3 for bridge */ 331 unsigned int d3cold_allowed:1; /* D3cold is allowed by user */ 332 unsigned int mmio_always_on:1; /* Disallow turning off io/mem 333 decoding during BAR sizing */ 334 unsigned int wakeup_prepared:1; 335 unsigned int runtime_d3cold:1; /* Whether go through runtime 336 D3cold, not set for devices 337 powered on/off by the 338 corresponding bridge */ 339 unsigned int ignore_hotplug:1; /* Ignore hotplug events */ 340 unsigned int hotplug_user_indicators:1; /* SlotCtl indicators 341 controlled exclusively by 342 user sysfs */ 343 unsigned int d3_delay; /* D3->D0 transition time in ms */ 344 unsigned int d3cold_delay; /* D3cold->D0 transition time in ms */ 345 346 #ifdef CONFIG_PCIEASPM 347 struct pcie_link_state *link_state; /* ASPM link state */ 348 unsigned int ltr_path:1; /* Latency Tolerance Reporting 349 supported from root to here */ 350 #endif 351 352 pci_channel_state_t error_state; /* Current connectivity state */ 353 struct device dev; /* Generic device interface */ 354 355 int cfg_size; /* Size of config space */ 356 357 /* 358 * Instead of touching interrupt line and base address registers 359 * directly, use the values stored here. They might be different! 360 */ 361 unsigned int irq; 362 struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */ 363 364 bool match_driver; /* Skip attaching driver */ 365 366 unsigned int transparent:1; /* Subtractive decode bridge */ 367 unsigned int multifunction:1; /* Multi-function device */ 368 369 unsigned int is_added:1; 370 unsigned int is_busmaster:1; /* Is busmaster */ 371 unsigned int no_msi:1; /* May not use MSI */ 372 unsigned int no_64bit_msi:1; /* May only use 32-bit MSIs */ 373 unsigned int block_cfg_access:1; /* Config space access blocked */ 374 unsigned int broken_parity_status:1; /* Generates false positive parity */ 375 unsigned int irq_reroute_variant:2; /* Needs IRQ rerouting variant */ 376 unsigned int msi_enabled:1; 377 unsigned int msix_enabled:1; 378 unsigned int ari_enabled:1; /* ARI forwarding */ 379 unsigned int ats_enabled:1; /* Address Translation Svc */ 380 unsigned int pasid_enabled:1; /* Process Address Space ID */ 381 unsigned int pri_enabled:1; /* Page Request Interface */ 382 unsigned int is_managed:1; 383 unsigned int needs_freset:1; /* Requires fundamental reset */ 384 unsigned int state_saved:1; 385 unsigned int is_physfn:1; 386 unsigned int is_virtfn:1; 387 unsigned int reset_fn:1; 388 unsigned int is_hotplug_bridge:1; 389 unsigned int is_thunderbolt:1; /* Thunderbolt controller */ 390 unsigned int __aer_firmware_first_valid:1; 391 unsigned int __aer_firmware_first:1; 392 unsigned int broken_intx_masking:1; /* INTx masking can't be used */ 393 unsigned int io_window_1k:1; /* Intel bridge 1K I/O windows */ 394 unsigned int irq_managed:1; 395 unsigned int has_secondary_link:1; 396 unsigned int non_compliant_bars:1; /* Broken BARs; ignore them */ 397 unsigned int is_probed:1; /* Device probing in progress */ 398 pci_dev_flags_t dev_flags; 399 atomic_t enable_cnt; /* pci_enable_device has been called */ 400 401 u32 saved_config_space[16]; /* Config space saved at suspend time */ 402 struct hlist_head saved_cap_space; 403 struct bin_attribute *rom_attr; /* Attribute descriptor for sysfs ROM entry */ 404 int rom_attr_enabled; /* Display of ROM attribute enabled? */ 405 struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */ 406 struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */ 407 408 #ifdef CONFIG_PCIE_PTM 409 unsigned int ptm_root:1; 410 unsigned int ptm_enabled:1; 411 u8 ptm_granularity; 412 #endif 413 #ifdef CONFIG_PCI_MSI 414 const struct attribute_group **msi_irq_groups; 415 #endif 416 struct pci_vpd *vpd; 417 #ifdef CONFIG_PCI_ATS 418 union { 419 struct pci_sriov *sriov; /* PF: SR-IOV info */ 420 struct pci_dev *physfn; /* VF: related PF */ 421 }; 422 u16 ats_cap; /* ATS Capability offset */ 423 u8 ats_stu; /* ATS Smallest Translation Unit */ 424 atomic_t ats_ref_cnt; /* Number of VFs with ATS enabled */ 425 #endif 426 #ifdef CONFIG_PCI_PRI 427 u32 pri_reqs_alloc; /* Number of PRI requests allocated */ 428 #endif 429 #ifdef CONFIG_PCI_PASID 430 u16 pasid_features; 431 #endif 432 phys_addr_t rom; /* Physical address if not from BAR */ 433 size_t romlen; /* Length if not from BAR */ 434 char *driver_override; /* Driver name to force a match */ 435 436 unsigned long priv_flags; /* Private flags for the PCI driver */ 437 }; 438 439 static inline struct pci_dev *pci_physfn(struct pci_dev *dev) 440 { 441 #ifdef CONFIG_PCI_IOV 442 if (dev->is_virtfn) 443 dev = dev->physfn; 444 #endif 445 return dev; 446 } 447 448 struct pci_dev *pci_alloc_dev(struct pci_bus *bus); 449 450 #define to_pci_dev(n) container_of(n, struct pci_dev, dev) 451 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL) 452 453 static inline int pci_channel_offline(struct pci_dev *pdev) 454 { 455 return (pdev->error_state != pci_channel_io_normal); 456 } 457 458 struct pci_host_bridge { 459 struct device dev; 460 struct pci_bus *bus; /* Root bus */ 461 struct pci_ops *ops; 462 void *sysdata; 463 int busnr; 464 struct list_head windows; /* resource_entry */ 465 u8 (*swizzle_irq)(struct pci_dev *, u8 *); /* Platform IRQ swizzler */ 466 int (*map_irq)(const struct pci_dev *, u8, u8); 467 void (*release_fn)(struct pci_host_bridge *); 468 void *release_data; 469 struct msi_controller *msi; 470 unsigned int ignore_reset_delay:1; /* For entire hierarchy */ 471 unsigned int no_ext_tags:1; /* No Extended Tags */ 472 /* Resource alignment requirements */ 473 resource_size_t (*align_resource)(struct pci_dev *dev, 474 const struct resource *res, 475 resource_size_t start, 476 resource_size_t size, 477 resource_size_t align); 478 unsigned long private[0] ____cacheline_aligned; 479 }; 480 481 #define to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev) 482 483 static inline void *pci_host_bridge_priv(struct pci_host_bridge *bridge) 484 { 485 return (void *)bridge->private; 486 } 487 488 static inline struct pci_host_bridge *pci_host_bridge_from_priv(void *priv) 489 { 490 return container_of(priv, struct pci_host_bridge, private); 491 } 492 493 struct pci_host_bridge *pci_alloc_host_bridge(size_t priv); 494 struct pci_host_bridge *devm_pci_alloc_host_bridge(struct device *dev, 495 size_t priv); 496 void pci_free_host_bridge(struct pci_host_bridge *bridge); 497 struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus); 498 499 void pci_set_host_bridge_release(struct pci_host_bridge *bridge, 500 void (*release_fn)(struct pci_host_bridge *), 501 void *release_data); 502 503 int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge); 504 505 /* 506 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond 507 * to P2P or CardBus bridge windows) go in a table. Additional ones (for 508 * buses below host bridges or subtractive decode bridges) go in the list. 509 * Use pci_bus_for_each_resource() to iterate through all the resources. 510 */ 511 512 /* 513 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly 514 * and there's no way to program the bridge with the details of the window. 515 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive- 516 * decode bit set, because they are explicit and can be programmed with _SRS. 517 */ 518 #define PCI_SUBTRACTIVE_DECODE 0x1 519 520 struct pci_bus_resource { 521 struct list_head list; 522 struct resource *res; 523 unsigned int flags; 524 }; 525 526 #define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */ 527 528 struct pci_bus { 529 struct list_head node; /* Node in list of buses */ 530 struct pci_bus *parent; /* Parent bus this bridge is on */ 531 struct list_head children; /* List of child buses */ 532 struct list_head devices; /* List of devices on this bus */ 533 struct pci_dev *self; /* Bridge device as seen by parent */ 534 struct list_head slots; /* List of slots on this bus; 535 protected by pci_slot_mutex */ 536 struct resource *resource[PCI_BRIDGE_RESOURCE_NUM]; 537 struct list_head resources; /* Address space routed to this bus */ 538 struct resource busn_res; /* Bus numbers routed to this bus */ 539 540 struct pci_ops *ops; /* Configuration access functions */ 541 struct msi_controller *msi; /* MSI controller */ 542 void *sysdata; /* Hook for sys-specific extension */ 543 struct proc_dir_entry *procdir; /* Directory entry in /proc/bus/pci */ 544 545 unsigned char number; /* Bus number */ 546 unsigned char primary; /* Number of primary bridge */ 547 unsigned char max_bus_speed; /* enum pci_bus_speed */ 548 unsigned char cur_bus_speed; /* enum pci_bus_speed */ 549 #ifdef CONFIG_PCI_DOMAINS_GENERIC 550 int domain_nr; 551 #endif 552 553 char name[48]; 554 555 unsigned short bridge_ctl; /* Manage NO_ISA/FBB/et al behaviors */ 556 pci_bus_flags_t bus_flags; /* Inherited by child buses */ 557 struct device *bridge; 558 struct device dev; 559 struct bin_attribute *legacy_io; /* Legacy I/O for this bus */ 560 struct bin_attribute *legacy_mem; /* Legacy mem */ 561 unsigned int is_added:1; 562 }; 563 564 #define to_pci_bus(n) container_of(n, struct pci_bus, dev) 565 566 /* 567 * Returns true if the PCI bus is root (behind host-PCI bridge), 568 * false otherwise 569 * 570 * Some code assumes that "bus->self == NULL" means that bus is a root bus. 571 * This is incorrect because "virtual" buses added for SR-IOV (via 572 * virtfn_add_bus()) have "bus->self == NULL" but are not root buses. 573 */ 574 static inline bool pci_is_root_bus(struct pci_bus *pbus) 575 { 576 return !(pbus->parent); 577 } 578 579 /** 580 * pci_is_bridge - check if the PCI device is a bridge 581 * @dev: PCI device 582 * 583 * Return true if the PCI device is bridge whether it has subordinate 584 * or not. 585 */ 586 static inline bool pci_is_bridge(struct pci_dev *dev) 587 { 588 return dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || 589 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS; 590 } 591 592 #define for_each_pci_bridge(dev, bus) \ 593 list_for_each_entry(dev, &bus->devices, bus_list) \ 594 if (!pci_is_bridge(dev)) {} else 595 596 static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev) 597 { 598 dev = pci_physfn(dev); 599 if (pci_is_root_bus(dev->bus)) 600 return NULL; 601 602 return dev->bus->self; 603 } 604 605 struct device *pci_get_host_bridge_device(struct pci_dev *dev); 606 void pci_put_host_bridge_device(struct device *dev); 607 608 #ifdef CONFIG_PCI_MSI 609 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) 610 { 611 return pci_dev->msi_enabled || pci_dev->msix_enabled; 612 } 613 #else 614 static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; } 615 #endif 616 617 /* Error values that may be returned by PCI functions */ 618 #define PCIBIOS_SUCCESSFUL 0x00 619 #define PCIBIOS_FUNC_NOT_SUPPORTED 0x81 620 #define PCIBIOS_BAD_VENDOR_ID 0x83 621 #define PCIBIOS_DEVICE_NOT_FOUND 0x86 622 #define PCIBIOS_BAD_REGISTER_NUMBER 0x87 623 #define PCIBIOS_SET_FAILED 0x88 624 #define PCIBIOS_BUFFER_TOO_SMALL 0x89 625 626 /* Translate above to generic errno for passing back through non-PCI code */ 627 static inline int pcibios_err_to_errno(int err) 628 { 629 if (err <= PCIBIOS_SUCCESSFUL) 630 return err; /* Assume already errno */ 631 632 switch (err) { 633 case PCIBIOS_FUNC_NOT_SUPPORTED: 634 return -ENOENT; 635 case PCIBIOS_BAD_VENDOR_ID: 636 return -ENOTTY; 637 case PCIBIOS_DEVICE_NOT_FOUND: 638 return -ENODEV; 639 case PCIBIOS_BAD_REGISTER_NUMBER: 640 return -EFAULT; 641 case PCIBIOS_SET_FAILED: 642 return -EIO; 643 case PCIBIOS_BUFFER_TOO_SMALL: 644 return -ENOSPC; 645 } 646 647 return -ERANGE; 648 } 649 650 /* Low-level architecture-dependent routines */ 651 652 struct pci_ops { 653 int (*add_bus)(struct pci_bus *bus); 654 void (*remove_bus)(struct pci_bus *bus); 655 void __iomem *(*map_bus)(struct pci_bus *bus, unsigned int devfn, int where); 656 int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val); 657 int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val); 658 }; 659 660 /* 661 * ACPI needs to be able to access PCI config space before we've done a 662 * PCI bus scan and created pci_bus structures. 663 */ 664 int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn, 665 int reg, int len, u32 *val); 666 int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn, 667 int reg, int len, u32 val); 668 669 #ifdef CONFIG_PCI_BUS_ADDR_T_64BIT 670 typedef u64 pci_bus_addr_t; 671 #else 672 typedef u32 pci_bus_addr_t; 673 #endif 674 675 struct pci_bus_region { 676 pci_bus_addr_t start; 677 pci_bus_addr_t end; 678 }; 679 680 struct pci_dynids { 681 spinlock_t lock; /* Protects list, index */ 682 struct list_head list; /* For IDs added at runtime */ 683 }; 684 685 686 /* 687 * PCI Error Recovery System (PCI-ERS). If a PCI device driver provides 688 * a set of callbacks in struct pci_error_handlers, that device driver 689 * will be notified of PCI bus errors, and will be driven to recovery 690 * when an error occurs. 691 */ 692 693 typedef unsigned int __bitwise pci_ers_result_t; 694 695 enum pci_ers_result { 696 /* No result/none/not supported in device driver */ 697 PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1, 698 699 /* Device driver can recover without slot reset */ 700 PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2, 701 702 /* Device driver wants slot to be reset */ 703 PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3, 704 705 /* Device has completely failed, is unrecoverable */ 706 PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4, 707 708 /* Device driver is fully recovered and operational */ 709 PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5, 710 711 /* No AER capabilities registered for the driver */ 712 PCI_ERS_RESULT_NO_AER_DRIVER = (__force pci_ers_result_t) 6, 713 }; 714 715 /* PCI bus error event callbacks */ 716 struct pci_error_handlers { 717 /* PCI bus error detected on this device */ 718 pci_ers_result_t (*error_detected)(struct pci_dev *dev, 719 enum pci_channel_state error); 720 721 /* MMIO has been re-enabled, but not DMA */ 722 pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev); 723 724 /* PCI slot has been reset */ 725 pci_ers_result_t (*slot_reset)(struct pci_dev *dev); 726 727 /* PCI function reset prepare or completed */ 728 void (*reset_prepare)(struct pci_dev *dev); 729 void (*reset_done)(struct pci_dev *dev); 730 731 /* Device driver may resume normal operations */ 732 void (*resume)(struct pci_dev *dev); 733 }; 734 735 736 struct module; 737 struct pci_driver { 738 struct list_head node; 739 const char *name; 740 const struct pci_device_id *id_table; /* Must be non-NULL for probe to be called */ 741 int (*probe)(struct pci_dev *dev, const struct pci_device_id *id); /* New device inserted */ 742 void (*remove)(struct pci_dev *dev); /* Device removed (NULL if not a hot-plug capable driver) */ 743 int (*suspend)(struct pci_dev *dev, pm_message_t state); /* Device suspended */ 744 int (*suspend_late)(struct pci_dev *dev, pm_message_t state); 745 int (*resume_early)(struct pci_dev *dev); 746 int (*resume) (struct pci_dev *dev); /* Device woken up */ 747 void (*shutdown) (struct pci_dev *dev); 748 int (*sriov_configure) (struct pci_dev *dev, int num_vfs); /* On PF */ 749 const struct pci_error_handlers *err_handler; 750 const struct attribute_group **groups; 751 struct device_driver driver; 752 struct pci_dynids dynids; 753 }; 754 755 #define to_pci_driver(drv) container_of(drv, struct pci_driver, driver) 756 757 /** 758 * PCI_DEVICE - macro used to describe a specific PCI device 759 * @vend: the 16 bit PCI Vendor ID 760 * @dev: the 16 bit PCI Device ID 761 * 762 * This macro is used to create a struct pci_device_id that matches a 763 * specific device. The subvendor and subdevice fields will be set to 764 * PCI_ANY_ID. 765 */ 766 #define PCI_DEVICE(vend,dev) \ 767 .vendor = (vend), .device = (dev), \ 768 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID 769 770 /** 771 * PCI_DEVICE_SUB - macro used to describe a specific PCI device with subsystem 772 * @vend: the 16 bit PCI Vendor ID 773 * @dev: the 16 bit PCI Device ID 774 * @subvend: the 16 bit PCI Subvendor ID 775 * @subdev: the 16 bit PCI Subdevice ID 776 * 777 * This macro is used to create a struct pci_device_id that matches a 778 * specific device with subsystem information. 779 */ 780 #define PCI_DEVICE_SUB(vend, dev, subvend, subdev) \ 781 .vendor = (vend), .device = (dev), \ 782 .subvendor = (subvend), .subdevice = (subdev) 783 784 /** 785 * PCI_DEVICE_CLASS - macro used to describe a specific PCI device class 786 * @dev_class: the class, subclass, prog-if triple for this device 787 * @dev_class_mask: the class mask for this device 788 * 789 * This macro is used to create a struct pci_device_id that matches a 790 * specific PCI class. The vendor, device, subvendor, and subdevice 791 * fields will be set to PCI_ANY_ID. 792 */ 793 #define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \ 794 .class = (dev_class), .class_mask = (dev_class_mask), \ 795 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \ 796 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID 797 798 /** 799 * PCI_VDEVICE - macro used to describe a specific PCI device in short form 800 * @vend: the vendor name 801 * @dev: the 16 bit PCI Device ID 802 * 803 * This macro is used to create a struct pci_device_id that matches a 804 * specific PCI device. The subvendor, and subdevice fields will be set 805 * to PCI_ANY_ID. The macro allows the next field to follow as the device 806 * private data. 807 */ 808 #define PCI_VDEVICE(vend, dev) \ 809 .vendor = PCI_VENDOR_ID_##vend, .device = (dev), \ 810 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0 811 812 enum { 813 PCI_REASSIGN_ALL_RSRC = 0x00000001, /* Ignore firmware setup */ 814 PCI_REASSIGN_ALL_BUS = 0x00000002, /* Reassign all bus numbers */ 815 PCI_PROBE_ONLY = 0x00000004, /* Use existing setup */ 816 PCI_CAN_SKIP_ISA_ALIGN = 0x00000008, /* Don't do ISA alignment */ 817 PCI_ENABLE_PROC_DOMAINS = 0x00000010, /* Enable domains in /proc */ 818 PCI_COMPAT_DOMAIN_0 = 0x00000020, /* ... except domain 0 */ 819 PCI_SCAN_ALL_PCIE_DEVS = 0x00000040, /* Scan all, not just dev 0 */ 820 }; 821 822 /* These external functions are only available when PCI support is enabled */ 823 #ifdef CONFIG_PCI 824 825 extern unsigned int pci_flags; 826 827 static inline void pci_set_flags(int flags) { pci_flags = flags; } 828 static inline void pci_add_flags(int flags) { pci_flags |= flags; } 829 static inline void pci_clear_flags(int flags) { pci_flags &= ~flags; } 830 static inline int pci_has_flag(int flag) { return pci_flags & flag; } 831 832 void pcie_bus_configure_settings(struct pci_bus *bus); 833 834 enum pcie_bus_config_types { 835 PCIE_BUS_TUNE_OFF, /* Don't touch MPS at all */ 836 PCIE_BUS_DEFAULT, /* Ensure MPS matches upstream bridge */ 837 PCIE_BUS_SAFE, /* Use largest MPS boot-time devices support */ 838 PCIE_BUS_PERFORMANCE, /* Use MPS and MRRS for best performance */ 839 PCIE_BUS_PEER2PEER, /* Set MPS = 128 for all devices */ 840 }; 841 842 extern enum pcie_bus_config_types pcie_bus_config; 843 844 extern struct bus_type pci_bus_type; 845 846 /* Do NOT directly access these two variables, unless you are arch-specific PCI 847 * code, or PCI core code. */ 848 extern struct list_head pci_root_buses; /* List of all known PCI buses */ 849 /* Some device drivers need know if PCI is initiated */ 850 int no_pci_devices(void); 851 852 void pcibios_resource_survey_bus(struct pci_bus *bus); 853 void pcibios_bus_add_device(struct pci_dev *pdev); 854 void pcibios_add_bus(struct pci_bus *bus); 855 void pcibios_remove_bus(struct pci_bus *bus); 856 void pcibios_fixup_bus(struct pci_bus *); 857 int __must_check pcibios_enable_device(struct pci_dev *, int mask); 858 /* Architecture-specific versions may override this (weak) */ 859 char *pcibios_setup(char *str); 860 861 /* Used only when drivers/pci/setup.c is used */ 862 resource_size_t pcibios_align_resource(void *, const struct resource *, 863 resource_size_t, 864 resource_size_t); 865 866 /* Weak but can be overriden by arch */ 867 void pci_fixup_cardbus(struct pci_bus *); 868 869 /* Generic PCI functions used internally */ 870 871 void pcibios_resource_to_bus(struct pci_bus *bus, struct pci_bus_region *region, 872 struct resource *res); 873 void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res, 874 struct pci_bus_region *region); 875 void pcibios_scan_specific_bus(int busn); 876 struct pci_bus *pci_find_bus(int domain, int busnr); 877 void pci_bus_add_devices(const struct pci_bus *bus); 878 struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata); 879 struct pci_bus *pci_create_root_bus(struct device *parent, int bus, 880 struct pci_ops *ops, void *sysdata, 881 struct list_head *resources); 882 int pci_host_probe(struct pci_host_bridge *bridge); 883 int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax); 884 int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax); 885 void pci_bus_release_busn_res(struct pci_bus *b); 886 struct pci_bus *pci_scan_root_bus(struct device *parent, int bus, 887 struct pci_ops *ops, void *sysdata, 888 struct list_head *resources); 889 int pci_scan_root_bus_bridge(struct pci_host_bridge *bridge); 890 struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, 891 int busnr); 892 void pcie_update_link_speed(struct pci_bus *bus, u16 link_status); 893 struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr, 894 const char *name, 895 struct hotplug_slot *hotplug); 896 void pci_destroy_slot(struct pci_slot *slot); 897 #ifdef CONFIG_SYSFS 898 void pci_dev_assign_slot(struct pci_dev *dev); 899 #else 900 static inline void pci_dev_assign_slot(struct pci_dev *dev) { } 901 #endif 902 int pci_scan_slot(struct pci_bus *bus, int devfn); 903 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn); 904 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus); 905 unsigned int pci_scan_child_bus(struct pci_bus *bus); 906 void pci_bus_add_device(struct pci_dev *dev); 907 void pci_read_bridge_bases(struct pci_bus *child); 908 struct resource *pci_find_parent_resource(const struct pci_dev *dev, 909 struct resource *res); 910 struct pci_dev *pci_find_pcie_root_port(struct pci_dev *dev); 911 u8 pci_swizzle_interrupt_pin(const struct pci_dev *dev, u8 pin); 912 int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge); 913 u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp); 914 struct pci_dev *pci_dev_get(struct pci_dev *dev); 915 void pci_dev_put(struct pci_dev *dev); 916 void pci_remove_bus(struct pci_bus *b); 917 void pci_stop_and_remove_bus_device(struct pci_dev *dev); 918 void pci_stop_and_remove_bus_device_locked(struct pci_dev *dev); 919 void pci_stop_root_bus(struct pci_bus *bus); 920 void pci_remove_root_bus(struct pci_bus *bus); 921 void pci_setup_cardbus(struct pci_bus *bus); 922 void pcibios_setup_bridge(struct pci_bus *bus, unsigned long type); 923 void pci_sort_breadthfirst(void); 924 #define dev_is_pci(d) ((d)->bus == &pci_bus_type) 925 #define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false)) 926 927 /* Generic PCI functions exported to card drivers */ 928 929 enum pci_lost_interrupt_reason { 930 PCI_LOST_IRQ_NO_INFORMATION = 0, 931 PCI_LOST_IRQ_DISABLE_MSI, 932 PCI_LOST_IRQ_DISABLE_MSIX, 933 PCI_LOST_IRQ_DISABLE_ACPI, 934 }; 935 enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *dev); 936 int pci_find_capability(struct pci_dev *dev, int cap); 937 int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap); 938 int pci_find_ext_capability(struct pci_dev *dev, int cap); 939 int pci_find_next_ext_capability(struct pci_dev *dev, int pos, int cap); 940 int pci_find_ht_capability(struct pci_dev *dev, int ht_cap); 941 int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap); 942 struct pci_bus *pci_find_next_bus(const struct pci_bus *from); 943 944 struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device, 945 struct pci_dev *from); 946 struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device, 947 unsigned int ss_vendor, unsigned int ss_device, 948 struct pci_dev *from); 949 struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn); 950 struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus, 951 unsigned int devfn); 952 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus, 953 unsigned int devfn) 954 { 955 return pci_get_domain_bus_and_slot(0, bus, devfn); 956 } 957 struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from); 958 int pci_dev_present(const struct pci_device_id *ids); 959 960 int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn, 961 int where, u8 *val); 962 int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn, 963 int where, u16 *val); 964 int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn, 965 int where, u32 *val); 966 int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn, 967 int where, u8 val); 968 int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn, 969 int where, u16 val); 970 int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn, 971 int where, u32 val); 972 973 int pci_generic_config_read(struct pci_bus *bus, unsigned int devfn, 974 int where, int size, u32 *val); 975 int pci_generic_config_write(struct pci_bus *bus, unsigned int devfn, 976 int where, int size, u32 val); 977 int pci_generic_config_read32(struct pci_bus *bus, unsigned int devfn, 978 int where, int size, u32 *val); 979 int pci_generic_config_write32(struct pci_bus *bus, unsigned int devfn, 980 int where, int size, u32 val); 981 982 struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops); 983 984 int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val); 985 int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val); 986 int pci_read_config_dword(const struct pci_dev *dev, int where, u32 *val); 987 int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val); 988 int pci_write_config_word(const struct pci_dev *dev, int where, u16 val); 989 int pci_write_config_dword(const struct pci_dev *dev, int where, u32 val); 990 991 int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val); 992 int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val); 993 int pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val); 994 int pcie_capability_write_dword(struct pci_dev *dev, int pos, u32 val); 995 int pcie_capability_clear_and_set_word(struct pci_dev *dev, int pos, 996 u16 clear, u16 set); 997 int pcie_capability_clear_and_set_dword(struct pci_dev *dev, int pos, 998 u32 clear, u32 set); 999 1000 static inline int pcie_capability_set_word(struct pci_dev *dev, int pos, 1001 u16 set) 1002 { 1003 return pcie_capability_clear_and_set_word(dev, pos, 0, set); 1004 } 1005 1006 static inline int pcie_capability_set_dword(struct pci_dev *dev, int pos, 1007 u32 set) 1008 { 1009 return pcie_capability_clear_and_set_dword(dev, pos, 0, set); 1010 } 1011 1012 static inline int pcie_capability_clear_word(struct pci_dev *dev, int pos, 1013 u16 clear) 1014 { 1015 return pcie_capability_clear_and_set_word(dev, pos, clear, 0); 1016 } 1017 1018 static inline int pcie_capability_clear_dword(struct pci_dev *dev, int pos, 1019 u32 clear) 1020 { 1021 return pcie_capability_clear_and_set_dword(dev, pos, clear, 0); 1022 } 1023 1024 /* User-space driven config access */ 1025 int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val); 1026 int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val); 1027 int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val); 1028 int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val); 1029 int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val); 1030 int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val); 1031 1032 int __must_check pci_enable_device(struct pci_dev *dev); 1033 int __must_check pci_enable_device_io(struct pci_dev *dev); 1034 int __must_check pci_enable_device_mem(struct pci_dev *dev); 1035 int __must_check pci_reenable_device(struct pci_dev *); 1036 int __must_check pcim_enable_device(struct pci_dev *pdev); 1037 void pcim_pin_device(struct pci_dev *pdev); 1038 1039 static inline bool pci_intx_mask_supported(struct pci_dev *pdev) 1040 { 1041 /* 1042 * INTx masking is supported if PCI_COMMAND_INTX_DISABLE is 1043 * writable and no quirk has marked the feature broken. 1044 */ 1045 return !pdev->broken_intx_masking; 1046 } 1047 1048 static inline int pci_is_enabled(struct pci_dev *pdev) 1049 { 1050 return (atomic_read(&pdev->enable_cnt) > 0); 1051 } 1052 1053 static inline int pci_is_managed(struct pci_dev *pdev) 1054 { 1055 return pdev->is_managed; 1056 } 1057 1058 void pci_disable_device(struct pci_dev *dev); 1059 1060 extern unsigned int pcibios_max_latency; 1061 void pci_set_master(struct pci_dev *dev); 1062 void pci_clear_master(struct pci_dev *dev); 1063 1064 int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state); 1065 int pci_set_cacheline_size(struct pci_dev *dev); 1066 #define HAVE_PCI_SET_MWI 1067 int __must_check pci_set_mwi(struct pci_dev *dev); 1068 int __must_check pcim_set_mwi(struct pci_dev *dev); 1069 int pci_try_set_mwi(struct pci_dev *dev); 1070 void pci_clear_mwi(struct pci_dev *dev); 1071 void pci_intx(struct pci_dev *dev, int enable); 1072 bool pci_check_and_mask_intx(struct pci_dev *dev); 1073 bool pci_check_and_unmask_intx(struct pci_dev *dev); 1074 int pci_wait_for_pending(struct pci_dev *dev, int pos, u16 mask); 1075 int pci_wait_for_pending_transaction(struct pci_dev *dev); 1076 int pcix_get_max_mmrbc(struct pci_dev *dev); 1077 int pcix_get_mmrbc(struct pci_dev *dev); 1078 int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc); 1079 int pcie_get_readrq(struct pci_dev *dev); 1080 int pcie_set_readrq(struct pci_dev *dev, int rq); 1081 int pcie_get_mps(struct pci_dev *dev); 1082 int pcie_set_mps(struct pci_dev *dev, int mps); 1083 int pcie_get_minimum_link(struct pci_dev *dev, enum pci_bus_speed *speed, 1084 enum pcie_link_width *width); 1085 void pcie_flr(struct pci_dev *dev); 1086 int __pci_reset_function_locked(struct pci_dev *dev); 1087 int pci_reset_function(struct pci_dev *dev); 1088 int pci_reset_function_locked(struct pci_dev *dev); 1089 int pci_try_reset_function(struct pci_dev *dev); 1090 int pci_probe_reset_slot(struct pci_slot *slot); 1091 int pci_reset_slot(struct pci_slot *slot); 1092 int pci_try_reset_slot(struct pci_slot *slot); 1093 int pci_probe_reset_bus(struct pci_bus *bus); 1094 int pci_reset_bus(struct pci_bus *bus); 1095 int pci_try_reset_bus(struct pci_bus *bus); 1096 void pci_reset_secondary_bus(struct pci_dev *dev); 1097 void pcibios_reset_secondary_bus(struct pci_dev *dev); 1098 void pci_reset_bridge_secondary_bus(struct pci_dev *dev); 1099 void pci_update_resource(struct pci_dev *dev, int resno); 1100 int __must_check pci_assign_resource(struct pci_dev *dev, int i); 1101 int __must_check pci_reassign_resource(struct pci_dev *dev, int i, resource_size_t add_size, resource_size_t align); 1102 void pci_release_resource(struct pci_dev *dev, int resno); 1103 int __must_check pci_resize_resource(struct pci_dev *dev, int i, int size); 1104 int pci_select_bars(struct pci_dev *dev, unsigned long flags); 1105 bool pci_device_is_present(struct pci_dev *pdev); 1106 void pci_ignore_hotplug(struct pci_dev *dev); 1107 1108 int __printf(6, 7) pci_request_irq(struct pci_dev *dev, unsigned int nr, 1109 irq_handler_t handler, irq_handler_t thread_fn, void *dev_id, 1110 const char *fmt, ...); 1111 void pci_free_irq(struct pci_dev *dev, unsigned int nr, void *dev_id); 1112 1113 /* ROM control related routines */ 1114 int pci_enable_rom(struct pci_dev *pdev); 1115 void pci_disable_rom(struct pci_dev *pdev); 1116 void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size); 1117 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom); 1118 size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size); 1119 void __iomem __must_check *pci_platform_rom(struct pci_dev *pdev, size_t *size); 1120 1121 /* Power management related routines */ 1122 int pci_save_state(struct pci_dev *dev); 1123 void pci_restore_state(struct pci_dev *dev); 1124 struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev); 1125 int pci_load_saved_state(struct pci_dev *dev, 1126 struct pci_saved_state *state); 1127 int pci_load_and_free_saved_state(struct pci_dev *dev, 1128 struct pci_saved_state **state); 1129 struct pci_cap_saved_state *pci_find_saved_cap(struct pci_dev *dev, char cap); 1130 struct pci_cap_saved_state *pci_find_saved_ext_cap(struct pci_dev *dev, 1131 u16 cap); 1132 int pci_add_cap_save_buffer(struct pci_dev *dev, char cap, unsigned int size); 1133 int pci_add_ext_cap_save_buffer(struct pci_dev *dev, 1134 u16 cap, unsigned int size); 1135 int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state); 1136 int pci_set_power_state(struct pci_dev *dev, pci_power_t state); 1137 pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state); 1138 bool pci_pme_capable(struct pci_dev *dev, pci_power_t state); 1139 void pci_pme_active(struct pci_dev *dev, bool enable); 1140 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable); 1141 int pci_wake_from_d3(struct pci_dev *dev, bool enable); 1142 int pci_prepare_to_sleep(struct pci_dev *dev); 1143 int pci_back_from_sleep(struct pci_dev *dev); 1144 bool pci_dev_run_wake(struct pci_dev *dev); 1145 bool pci_check_pme_status(struct pci_dev *dev); 1146 void pci_pme_wakeup_bus(struct pci_bus *bus); 1147 void pci_d3cold_enable(struct pci_dev *dev); 1148 void pci_d3cold_disable(struct pci_dev *dev); 1149 bool pcie_relaxed_ordering_enabled(struct pci_dev *dev); 1150 1151 /* PCI Virtual Channel */ 1152 int pci_save_vc_state(struct pci_dev *dev); 1153 void pci_restore_vc_state(struct pci_dev *dev); 1154 void pci_allocate_vc_save_buffers(struct pci_dev *dev); 1155 1156 /* For use by arch with custom probe code */ 1157 void set_pcie_port_type(struct pci_dev *pdev); 1158 void set_pcie_hotplug_bridge(struct pci_dev *pdev); 1159 1160 /* Functions for PCI Hotplug drivers to use */ 1161 int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap); 1162 unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge); 1163 unsigned int pci_rescan_bus(struct pci_bus *bus); 1164 void pci_lock_rescan_remove(void); 1165 void pci_unlock_rescan_remove(void); 1166 1167 /* Vital Product Data routines */ 1168 ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf); 1169 ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf); 1170 int pci_set_vpd_size(struct pci_dev *dev, size_t len); 1171 1172 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */ 1173 resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx); 1174 void pci_bus_assign_resources(const struct pci_bus *bus); 1175 void pci_bus_claim_resources(struct pci_bus *bus); 1176 void pci_bus_size_bridges(struct pci_bus *bus); 1177 int pci_claim_resource(struct pci_dev *, int); 1178 int pci_claim_bridge_resource(struct pci_dev *bridge, int i); 1179 void pci_assign_unassigned_resources(void); 1180 void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge); 1181 void pci_assign_unassigned_bus_resources(struct pci_bus *bus); 1182 void pci_assign_unassigned_root_bus_resources(struct pci_bus *bus); 1183 int pci_reassign_bridge_resources(struct pci_dev *bridge, unsigned long type); 1184 void pdev_enable_device(struct pci_dev *); 1185 int pci_enable_resources(struct pci_dev *, int mask); 1186 void pci_assign_irq(struct pci_dev *dev); 1187 struct resource *pci_find_resource(struct pci_dev *dev, struct resource *res); 1188 #define HAVE_PCI_REQ_REGIONS 2 1189 int __must_check pci_request_regions(struct pci_dev *, const char *); 1190 int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *); 1191 void pci_release_regions(struct pci_dev *); 1192 int __must_check pci_request_region(struct pci_dev *, int, const char *); 1193 int __must_check pci_request_region_exclusive(struct pci_dev *, int, const char *); 1194 void pci_release_region(struct pci_dev *, int); 1195 int pci_request_selected_regions(struct pci_dev *, int, const char *); 1196 int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *); 1197 void pci_release_selected_regions(struct pci_dev *, int); 1198 1199 /* drivers/pci/bus.c */ 1200 struct pci_bus *pci_bus_get(struct pci_bus *bus); 1201 void pci_bus_put(struct pci_bus *bus); 1202 void pci_add_resource(struct list_head *resources, struct resource *res); 1203 void pci_add_resource_offset(struct list_head *resources, struct resource *res, 1204 resource_size_t offset); 1205 void pci_free_resource_list(struct list_head *resources); 1206 void pci_bus_add_resource(struct pci_bus *bus, struct resource *res, 1207 unsigned int flags); 1208 struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n); 1209 void pci_bus_remove_resources(struct pci_bus *bus); 1210 int devm_request_pci_bus_resources(struct device *dev, 1211 struct list_head *resources); 1212 1213 #define pci_bus_for_each_resource(bus, res, i) \ 1214 for (i = 0; \ 1215 (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \ 1216 i++) 1217 1218 int __must_check pci_bus_alloc_resource(struct pci_bus *bus, 1219 struct resource *res, resource_size_t size, 1220 resource_size_t align, resource_size_t min, 1221 unsigned long type_mask, 1222 resource_size_t (*alignf)(void *, 1223 const struct resource *, 1224 resource_size_t, 1225 resource_size_t), 1226 void *alignf_data); 1227 1228 1229 int pci_register_io_range(phys_addr_t addr, resource_size_t size); 1230 unsigned long pci_address_to_pio(phys_addr_t addr); 1231 phys_addr_t pci_pio_to_address(unsigned long pio); 1232 int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr); 1233 void pci_unmap_iospace(struct resource *res); 1234 void __iomem *devm_pci_remap_cfgspace(struct device *dev, 1235 resource_size_t offset, 1236 resource_size_t size); 1237 void __iomem *devm_pci_remap_cfg_resource(struct device *dev, 1238 struct resource *res); 1239 1240 static inline pci_bus_addr_t pci_bus_address(struct pci_dev *pdev, int bar) 1241 { 1242 struct pci_bus_region region; 1243 1244 pcibios_resource_to_bus(pdev->bus, ®ion, &pdev->resource[bar]); 1245 return region.start; 1246 } 1247 1248 /* Proper probing supporting hot-pluggable devices */ 1249 int __must_check __pci_register_driver(struct pci_driver *, struct module *, 1250 const char *mod_name); 1251 1252 /* pci_register_driver() must be a macro so KBUILD_MODNAME can be expanded */ 1253 #define pci_register_driver(driver) \ 1254 __pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME) 1255 1256 void pci_unregister_driver(struct pci_driver *dev); 1257 1258 /** 1259 * module_pci_driver() - Helper macro for registering a PCI driver 1260 * @__pci_driver: pci_driver struct 1261 * 1262 * Helper macro for PCI drivers which do not do anything special in module 1263 * init/exit. This eliminates a lot of boilerplate. Each module may only 1264 * use this macro once, and calling it replaces module_init() and module_exit() 1265 */ 1266 #define module_pci_driver(__pci_driver) \ 1267 module_driver(__pci_driver, pci_register_driver, pci_unregister_driver) 1268 1269 /** 1270 * builtin_pci_driver() - Helper macro for registering a PCI driver 1271 * @__pci_driver: pci_driver struct 1272 * 1273 * Helper macro for PCI drivers which do not do anything special in their 1274 * init code. This eliminates a lot of boilerplate. Each driver may only 1275 * use this macro once, and calling it replaces device_initcall(...) 1276 */ 1277 #define builtin_pci_driver(__pci_driver) \ 1278 builtin_driver(__pci_driver, pci_register_driver) 1279 1280 struct pci_driver *pci_dev_driver(const struct pci_dev *dev); 1281 int pci_add_dynid(struct pci_driver *drv, 1282 unsigned int vendor, unsigned int device, 1283 unsigned int subvendor, unsigned int subdevice, 1284 unsigned int class, unsigned int class_mask, 1285 unsigned long driver_data); 1286 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, 1287 struct pci_dev *dev); 1288 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, 1289 int pass); 1290 1291 void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *), 1292 void *userdata); 1293 int pci_cfg_space_size(struct pci_dev *dev); 1294 unsigned char pci_bus_max_busnr(struct pci_bus *bus); 1295 void pci_setup_bridge(struct pci_bus *bus); 1296 resource_size_t pcibios_window_alignment(struct pci_bus *bus, 1297 unsigned long type); 1298 resource_size_t pcibios_iov_resource_alignment(struct pci_dev *dev, int resno); 1299 1300 #define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0) 1301 #define PCI_VGA_STATE_CHANGE_DECODES (1 << 1) 1302 1303 int pci_set_vga_state(struct pci_dev *pdev, bool decode, 1304 unsigned int command_bits, u32 flags); 1305 1306 #define PCI_IRQ_LEGACY (1 << 0) /* Allow legacy interrupts */ 1307 #define PCI_IRQ_MSI (1 << 1) /* Allow MSI interrupts */ 1308 #define PCI_IRQ_MSIX (1 << 2) /* Allow MSI-X interrupts */ 1309 #define PCI_IRQ_AFFINITY (1 << 3) /* Auto-assign affinity */ 1310 #define PCI_IRQ_ALL_TYPES \ 1311 (PCI_IRQ_LEGACY | PCI_IRQ_MSI | PCI_IRQ_MSIX) 1312 1313 /* kmem_cache style wrapper around pci_alloc_consistent() */ 1314 1315 #include <linux/pci-dma.h> 1316 #include <linux/dmapool.h> 1317 1318 #define pci_pool dma_pool 1319 #define pci_pool_create(name, pdev, size, align, allocation) \ 1320 dma_pool_create(name, &pdev->dev, size, align, allocation) 1321 #define pci_pool_destroy(pool) dma_pool_destroy(pool) 1322 #define pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle) 1323 #define pci_pool_zalloc(pool, flags, handle) \ 1324 dma_pool_zalloc(pool, flags, handle) 1325 #define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr) 1326 1327 struct msix_entry { 1328 u32 vector; /* Kernel uses to write allocated vector */ 1329 u16 entry; /* Driver uses to specify entry, OS writes */ 1330 }; 1331 1332 #ifdef CONFIG_PCI_MSI 1333 int pci_msi_vec_count(struct pci_dev *dev); 1334 void pci_disable_msi(struct pci_dev *dev); 1335 int pci_msix_vec_count(struct pci_dev *dev); 1336 void pci_disable_msix(struct pci_dev *dev); 1337 void pci_restore_msi_state(struct pci_dev *dev); 1338 int pci_msi_enabled(void); 1339 int pci_enable_msi(struct pci_dev *dev); 1340 int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries, 1341 int minvec, int maxvec); 1342 static inline int pci_enable_msix_exact(struct pci_dev *dev, 1343 struct msix_entry *entries, int nvec) 1344 { 1345 int rc = pci_enable_msix_range(dev, entries, nvec, nvec); 1346 if (rc < 0) 1347 return rc; 1348 return 0; 1349 } 1350 int pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs, 1351 unsigned int max_vecs, unsigned int flags, 1352 const struct irq_affinity *affd); 1353 1354 void pci_free_irq_vectors(struct pci_dev *dev); 1355 int pci_irq_vector(struct pci_dev *dev, unsigned int nr); 1356 const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev, int vec); 1357 int pci_irq_get_node(struct pci_dev *pdev, int vec); 1358 1359 #else 1360 static inline int pci_msi_vec_count(struct pci_dev *dev) { return -ENOSYS; } 1361 static inline void pci_disable_msi(struct pci_dev *dev) { } 1362 static inline int pci_msix_vec_count(struct pci_dev *dev) { return -ENOSYS; } 1363 static inline void pci_disable_msix(struct pci_dev *dev) { } 1364 static inline void pci_restore_msi_state(struct pci_dev *dev) { } 1365 static inline int pci_msi_enabled(void) { return 0; } 1366 static inline int pci_enable_msi(struct pci_dev *dev) 1367 { return -ENOSYS; } 1368 static inline int pci_enable_msix_range(struct pci_dev *dev, 1369 struct msix_entry *entries, int minvec, int maxvec) 1370 { return -ENOSYS; } 1371 static inline int pci_enable_msix_exact(struct pci_dev *dev, 1372 struct msix_entry *entries, int nvec) 1373 { return -ENOSYS; } 1374 1375 static inline int 1376 pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs, 1377 unsigned int max_vecs, unsigned int flags, 1378 const struct irq_affinity *aff_desc) 1379 { 1380 if ((flags & PCI_IRQ_LEGACY) && min_vecs == 1 && dev->irq) 1381 return 1; 1382 return -ENOSPC; 1383 } 1384 1385 static inline void pci_free_irq_vectors(struct pci_dev *dev) 1386 { 1387 } 1388 1389 static inline int pci_irq_vector(struct pci_dev *dev, unsigned int nr) 1390 { 1391 if (WARN_ON_ONCE(nr > 0)) 1392 return -EINVAL; 1393 return dev->irq; 1394 } 1395 static inline const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev, 1396 int vec) 1397 { 1398 return cpu_possible_mask; 1399 } 1400 1401 static inline int pci_irq_get_node(struct pci_dev *pdev, int vec) 1402 { 1403 return first_online_node; 1404 } 1405 #endif 1406 1407 static inline int 1408 pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs, 1409 unsigned int max_vecs, unsigned int flags) 1410 { 1411 return pci_alloc_irq_vectors_affinity(dev, min_vecs, max_vecs, flags, 1412 NULL); 1413 } 1414 1415 /** 1416 * pci_irqd_intx_xlate() - Translate PCI INTx value to an IRQ domain hwirq 1417 * @d: the INTx IRQ domain 1418 * @node: the DT node for the device whose interrupt we're translating 1419 * @intspec: the interrupt specifier data from the DT 1420 * @intsize: the number of entries in @intspec 1421 * @out_hwirq: pointer at which to write the hwirq number 1422 * @out_type: pointer at which to write the interrupt type 1423 * 1424 * Translate a PCI INTx interrupt number from device tree in the range 1-4, as 1425 * stored in the standard PCI_INTERRUPT_PIN register, to a value in the range 1426 * 0-3 suitable for use in a 4 entry IRQ domain. That is, subtract one from the 1427 * INTx value to obtain the hwirq number. 1428 * 1429 * Returns 0 on success, or -EINVAL if the interrupt specifier is out of range. 1430 */ 1431 static inline int pci_irqd_intx_xlate(struct irq_domain *d, 1432 struct device_node *node, 1433 const u32 *intspec, 1434 unsigned int intsize, 1435 unsigned long *out_hwirq, 1436 unsigned int *out_type) 1437 { 1438 const u32 intx = intspec[0]; 1439 1440 if (intx < PCI_INTERRUPT_INTA || intx > PCI_INTERRUPT_INTD) 1441 return -EINVAL; 1442 1443 *out_hwirq = intx - PCI_INTERRUPT_INTA; 1444 return 0; 1445 } 1446 1447 #ifdef CONFIG_PCIEPORTBUS 1448 extern bool pcie_ports_disabled; 1449 extern bool pcie_ports_auto; 1450 #else 1451 #define pcie_ports_disabled true 1452 #define pcie_ports_auto false 1453 #endif 1454 1455 #ifdef CONFIG_PCIEASPM 1456 bool pcie_aspm_support_enabled(void); 1457 #else 1458 static inline bool pcie_aspm_support_enabled(void) { return false; } 1459 #endif 1460 1461 #ifdef CONFIG_PCIEAER 1462 void pci_no_aer(void); 1463 bool pci_aer_available(void); 1464 int pci_aer_init(struct pci_dev *dev); 1465 #else 1466 static inline void pci_no_aer(void) { } 1467 static inline bool pci_aer_available(void) { return false; } 1468 static inline int pci_aer_init(struct pci_dev *d) { return -ENODEV; } 1469 #endif 1470 1471 #ifdef CONFIG_PCIE_ECRC 1472 void pcie_set_ecrc_checking(struct pci_dev *dev); 1473 void pcie_ecrc_get_policy(char *str); 1474 #else 1475 static inline void pcie_set_ecrc_checking(struct pci_dev *dev) { } 1476 static inline void pcie_ecrc_get_policy(char *str) { } 1477 #endif 1478 1479 #ifdef CONFIG_PCI_ATS 1480 /* Address Translation Service */ 1481 void pci_ats_init(struct pci_dev *dev); 1482 int pci_enable_ats(struct pci_dev *dev, int ps); 1483 void pci_disable_ats(struct pci_dev *dev); 1484 int pci_ats_queue_depth(struct pci_dev *dev); 1485 #else 1486 static inline void pci_ats_init(struct pci_dev *d) { } 1487 static inline int pci_enable_ats(struct pci_dev *d, int ps) { return -ENODEV; } 1488 static inline void pci_disable_ats(struct pci_dev *d) { } 1489 static inline int pci_ats_queue_depth(struct pci_dev *d) { return -ENODEV; } 1490 #endif 1491 1492 #ifdef CONFIG_PCIE_PTM 1493 int pci_enable_ptm(struct pci_dev *dev, u8 *granularity); 1494 #else 1495 static inline int pci_enable_ptm(struct pci_dev *dev, u8 *granularity) 1496 { return -EINVAL; } 1497 #endif 1498 1499 void pci_cfg_access_lock(struct pci_dev *dev); 1500 bool pci_cfg_access_trylock(struct pci_dev *dev); 1501 void pci_cfg_access_unlock(struct pci_dev *dev); 1502 1503 /* 1504 * PCI domain support. Sometimes called PCI segment (eg by ACPI), 1505 * a PCI domain is defined to be a set of PCI buses which share 1506 * configuration space. 1507 */ 1508 #ifdef CONFIG_PCI_DOMAINS 1509 extern int pci_domains_supported; 1510 int pci_get_new_domain_nr(void); 1511 #else 1512 enum { pci_domains_supported = 0 }; 1513 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; } 1514 static inline int pci_proc_domain(struct pci_bus *bus) { return 0; } 1515 static inline int pci_get_new_domain_nr(void) { return -ENOSYS; } 1516 #endif /* CONFIG_PCI_DOMAINS */ 1517 1518 /* 1519 * Generic implementation for PCI domain support. If your 1520 * architecture does not need custom management of PCI 1521 * domains then this implementation will be used 1522 */ 1523 #ifdef CONFIG_PCI_DOMAINS_GENERIC 1524 static inline int pci_domain_nr(struct pci_bus *bus) 1525 { 1526 return bus->domain_nr; 1527 } 1528 #ifdef CONFIG_ACPI 1529 int acpi_pci_bus_find_domain_nr(struct pci_bus *bus); 1530 #else 1531 static inline int acpi_pci_bus_find_domain_nr(struct pci_bus *bus) 1532 { return 0; } 1533 #endif 1534 int pci_bus_find_domain_nr(struct pci_bus *bus, struct device *parent); 1535 #endif 1536 1537 /* Some architectures require additional setup to direct VGA traffic */ 1538 typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode, 1539 unsigned int command_bits, u32 flags); 1540 void pci_register_set_vga_state(arch_set_vga_state_t func); 1541 1542 static inline int 1543 pci_request_io_regions(struct pci_dev *pdev, const char *name) 1544 { 1545 return pci_request_selected_regions(pdev, 1546 pci_select_bars(pdev, IORESOURCE_IO), name); 1547 } 1548 1549 static inline void 1550 pci_release_io_regions(struct pci_dev *pdev) 1551 { 1552 return pci_release_selected_regions(pdev, 1553 pci_select_bars(pdev, IORESOURCE_IO)); 1554 } 1555 1556 static inline int 1557 pci_request_mem_regions(struct pci_dev *pdev, const char *name) 1558 { 1559 return pci_request_selected_regions(pdev, 1560 pci_select_bars(pdev, IORESOURCE_MEM), name); 1561 } 1562 1563 static inline void 1564 pci_release_mem_regions(struct pci_dev *pdev) 1565 { 1566 return pci_release_selected_regions(pdev, 1567 pci_select_bars(pdev, IORESOURCE_MEM)); 1568 } 1569 1570 #else /* CONFIG_PCI is not enabled */ 1571 1572 static inline void pci_set_flags(int flags) { } 1573 static inline void pci_add_flags(int flags) { } 1574 static inline void pci_clear_flags(int flags) { } 1575 static inline int pci_has_flag(int flag) { return 0; } 1576 1577 /* 1578 * If the system does not have PCI, clearly these return errors. Define 1579 * these as simple inline functions to avoid hair in drivers. 1580 */ 1581 #define _PCI_NOP(o, s, t) \ 1582 static inline int pci_##o##_config_##s(struct pci_dev *dev, \ 1583 int where, t val) \ 1584 { return PCIBIOS_FUNC_NOT_SUPPORTED; } 1585 1586 #define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \ 1587 _PCI_NOP(o, word, u16 x) \ 1588 _PCI_NOP(o, dword, u32 x) 1589 _PCI_NOP_ALL(read, *) 1590 _PCI_NOP_ALL(write,) 1591 1592 static inline struct pci_dev *pci_get_device(unsigned int vendor, 1593 unsigned int device, 1594 struct pci_dev *from) 1595 { return NULL; } 1596 1597 static inline struct pci_dev *pci_get_subsys(unsigned int vendor, 1598 unsigned int device, 1599 unsigned int ss_vendor, 1600 unsigned int ss_device, 1601 struct pci_dev *from) 1602 { return NULL; } 1603 1604 static inline struct pci_dev *pci_get_class(unsigned int class, 1605 struct pci_dev *from) 1606 { return NULL; } 1607 1608 #define pci_dev_present(ids) (0) 1609 #define no_pci_devices() (1) 1610 #define pci_dev_put(dev) do { } while (0) 1611 1612 static inline void pci_set_master(struct pci_dev *dev) { } 1613 static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; } 1614 static inline void pci_disable_device(struct pci_dev *dev) { } 1615 static inline int pci_assign_resource(struct pci_dev *dev, int i) 1616 { return -EBUSY; } 1617 static inline int __pci_register_driver(struct pci_driver *drv, 1618 struct module *owner) 1619 { return 0; } 1620 static inline int pci_register_driver(struct pci_driver *drv) 1621 { return 0; } 1622 static inline void pci_unregister_driver(struct pci_driver *drv) { } 1623 static inline int pci_find_capability(struct pci_dev *dev, int cap) 1624 { return 0; } 1625 static inline int pci_find_next_capability(struct pci_dev *dev, u8 post, 1626 int cap) 1627 { return 0; } 1628 static inline int pci_find_ext_capability(struct pci_dev *dev, int cap) 1629 { return 0; } 1630 1631 /* Power management related routines */ 1632 static inline int pci_save_state(struct pci_dev *dev) { return 0; } 1633 static inline void pci_restore_state(struct pci_dev *dev) { } 1634 static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state) 1635 { return 0; } 1636 static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable) 1637 { return 0; } 1638 static inline pci_power_t pci_choose_state(struct pci_dev *dev, 1639 pm_message_t state) 1640 { return PCI_D0; } 1641 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state, 1642 int enable) 1643 { return 0; } 1644 1645 static inline struct resource *pci_find_resource(struct pci_dev *dev, 1646 struct resource *res) 1647 { return NULL; } 1648 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name) 1649 { return -EIO; } 1650 static inline void pci_release_regions(struct pci_dev *dev) { } 1651 1652 static inline unsigned long pci_address_to_pio(phys_addr_t addr) { return -1; } 1653 1654 static inline void pci_block_cfg_access(struct pci_dev *dev) { } 1655 static inline int pci_block_cfg_access_in_atomic(struct pci_dev *dev) 1656 { return 0; } 1657 static inline void pci_unblock_cfg_access(struct pci_dev *dev) { } 1658 1659 static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from) 1660 { return NULL; } 1661 static inline struct pci_dev *pci_get_slot(struct pci_bus *bus, 1662 unsigned int devfn) 1663 { return NULL; } 1664 static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus, 1665 unsigned int devfn) 1666 { return NULL; } 1667 static inline struct pci_dev *pci_get_domain_bus_and_slot(int domain, 1668 unsigned int bus, unsigned int devfn) 1669 { return NULL; } 1670 1671 static inline int pci_domain_nr(struct pci_bus *bus) { return 0; } 1672 static inline struct pci_dev *pci_dev_get(struct pci_dev *dev) { return NULL; } 1673 static inline int pci_get_new_domain_nr(void) { return -ENOSYS; } 1674 1675 #define dev_is_pci(d) (false) 1676 #define dev_is_pf(d) (false) 1677 static inline bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags) 1678 { return false; } 1679 static inline int pci_irqd_intx_xlate(struct irq_domain *d, 1680 struct device_node *node, 1681 const u32 *intspec, 1682 unsigned int intsize, 1683 unsigned long *out_hwirq, 1684 unsigned int *out_type) 1685 { return -EINVAL; } 1686 #endif /* CONFIG_PCI */ 1687 1688 /* Include architecture-dependent settings and functions */ 1689 1690 #include <asm/pci.h> 1691 1692 /* These two functions provide almost identical functionality. Depennding 1693 * on the architecture, one will be implemented as a wrapper around the 1694 * other (in drivers/pci/mmap.c). 1695 * 1696 * pci_mmap_resource_range() maps a specific BAR, and vm->vm_pgoff 1697 * is expected to be an offset within that region. 1698 * 1699 * pci_mmap_page_range() is the legacy architecture-specific interface, 1700 * which accepts a "user visible" resource address converted by 1701 * pci_resource_to_user(), as used in the legacy mmap() interface in 1702 * /proc/bus/pci/. 1703 */ 1704 int pci_mmap_resource_range(struct pci_dev *dev, int bar, 1705 struct vm_area_struct *vma, 1706 enum pci_mmap_state mmap_state, int write_combine); 1707 int pci_mmap_page_range(struct pci_dev *pdev, int bar, 1708 struct vm_area_struct *vma, 1709 enum pci_mmap_state mmap_state, int write_combine); 1710 1711 #ifndef arch_can_pci_mmap_wc 1712 #define arch_can_pci_mmap_wc() 0 1713 #endif 1714 1715 #ifndef arch_can_pci_mmap_io 1716 #define arch_can_pci_mmap_io() 0 1717 #define pci_iobar_pfn(pdev, bar, vma) (-EINVAL) 1718 #else 1719 int pci_iobar_pfn(struct pci_dev *pdev, int bar, struct vm_area_struct *vma); 1720 #endif 1721 1722 #ifndef pci_root_bus_fwnode 1723 #define pci_root_bus_fwnode(bus) NULL 1724 #endif 1725 1726 /* 1727 * These helpers provide future and backwards compatibility 1728 * for accessing popular PCI BAR info 1729 */ 1730 #define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start) 1731 #define pci_resource_end(dev, bar) ((dev)->resource[(bar)].end) 1732 #define pci_resource_flags(dev, bar) ((dev)->resource[(bar)].flags) 1733 #define pci_resource_len(dev,bar) \ 1734 ((pci_resource_start((dev), (bar)) == 0 && \ 1735 pci_resource_end((dev), (bar)) == \ 1736 pci_resource_start((dev), (bar))) ? 0 : \ 1737 \ 1738 (pci_resource_end((dev), (bar)) - \ 1739 pci_resource_start((dev), (bar)) + 1)) 1740 1741 /* 1742 * Similar to the helpers above, these manipulate per-pci_dev 1743 * driver-specific data. They are really just a wrapper around 1744 * the generic device structure functions of these calls. 1745 */ 1746 static inline void *pci_get_drvdata(struct pci_dev *pdev) 1747 { 1748 return dev_get_drvdata(&pdev->dev); 1749 } 1750 1751 static inline void pci_set_drvdata(struct pci_dev *pdev, void *data) 1752 { 1753 dev_set_drvdata(&pdev->dev, data); 1754 } 1755 1756 static inline const char *pci_name(const struct pci_dev *pdev) 1757 { 1758 return dev_name(&pdev->dev); 1759 } 1760 1761 1762 /* 1763 * Some archs don't want to expose struct resource to userland as-is 1764 * in sysfs and /proc 1765 */ 1766 #ifdef HAVE_ARCH_PCI_RESOURCE_TO_USER 1767 void pci_resource_to_user(const struct pci_dev *dev, int bar, 1768 const struct resource *rsrc, 1769 resource_size_t *start, resource_size_t *end); 1770 #else 1771 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar, 1772 const struct resource *rsrc, resource_size_t *start, 1773 resource_size_t *end) 1774 { 1775 *start = rsrc->start; 1776 *end = rsrc->end; 1777 } 1778 #endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */ 1779 1780 1781 /* 1782 * The world is not perfect and supplies us with broken PCI devices. 1783 * For at least a part of these bugs we need a work-around, so both 1784 * generic (drivers/pci/quirks.c) and per-architecture code can define 1785 * fixup hooks to be called for particular buggy devices. 1786 */ 1787 1788 struct pci_fixup { 1789 u16 vendor; /* Or PCI_ANY_ID */ 1790 u16 device; /* Or PCI_ANY_ID */ 1791 u32 class; /* Or PCI_ANY_ID */ 1792 unsigned int class_shift; /* should be 0, 8, 16 */ 1793 void (*hook)(struct pci_dev *dev); 1794 }; 1795 1796 enum pci_fixup_pass { 1797 pci_fixup_early, /* Before probing BARs */ 1798 pci_fixup_header, /* After reading configuration header */ 1799 pci_fixup_final, /* Final phase of device fixups */ 1800 pci_fixup_enable, /* pci_enable_device() time */ 1801 pci_fixup_resume, /* pci_device_resume() */ 1802 pci_fixup_suspend, /* pci_device_suspend() */ 1803 pci_fixup_resume_early, /* pci_device_resume_early() */ 1804 pci_fixup_suspend_late, /* pci_device_suspend_late() */ 1805 }; 1806 1807 /* Anonymous variables would be nice... */ 1808 #define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \ 1809 class_shift, hook) \ 1810 static const struct pci_fixup __PASTE(__pci_fixup_##name,__LINE__) __used \ 1811 __attribute__((__section__(#section), aligned((sizeof(void *))))) \ 1812 = { vendor, device, class, class_shift, hook }; 1813 1814 #define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class, \ 1815 class_shift, hook) \ 1816 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \ 1817 hook, vendor, device, class, class_shift, hook) 1818 #define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class, \ 1819 class_shift, hook) \ 1820 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \ 1821 hook, vendor, device, class, class_shift, hook) 1822 #define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class, \ 1823 class_shift, hook) \ 1824 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \ 1825 hook, vendor, device, class, class_shift, hook) 1826 #define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class, \ 1827 class_shift, hook) \ 1828 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \ 1829 hook, vendor, device, class, class_shift, hook) 1830 #define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class, \ 1831 class_shift, hook) \ 1832 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \ 1833 resume##hook, vendor, device, class, class_shift, hook) 1834 #define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class, \ 1835 class_shift, hook) \ 1836 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \ 1837 resume_early##hook, vendor, device, class, class_shift, hook) 1838 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class, \ 1839 class_shift, hook) \ 1840 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \ 1841 suspend##hook, vendor, device, class, class_shift, hook) 1842 #define DECLARE_PCI_FIXUP_CLASS_SUSPEND_LATE(vendor, device, class, \ 1843 class_shift, hook) \ 1844 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \ 1845 suspend_late##hook, vendor, device, class, class_shift, hook) 1846 1847 #define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \ 1848 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \ 1849 hook, vendor, device, PCI_ANY_ID, 0, hook) 1850 #define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \ 1851 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \ 1852 hook, vendor, device, PCI_ANY_ID, 0, hook) 1853 #define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \ 1854 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \ 1855 hook, vendor, device, PCI_ANY_ID, 0, hook) 1856 #define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \ 1857 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \ 1858 hook, vendor, device, PCI_ANY_ID, 0, hook) 1859 #define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \ 1860 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \ 1861 resume##hook, vendor, device, PCI_ANY_ID, 0, hook) 1862 #define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \ 1863 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \ 1864 resume_early##hook, vendor, device, PCI_ANY_ID, 0, hook) 1865 #define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \ 1866 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \ 1867 suspend##hook, vendor, device, PCI_ANY_ID, 0, hook) 1868 #define DECLARE_PCI_FIXUP_SUSPEND_LATE(vendor, device, hook) \ 1869 DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \ 1870 suspend_late##hook, vendor, device, PCI_ANY_ID, 0, hook) 1871 1872 #ifdef CONFIG_PCI_QUIRKS 1873 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev); 1874 int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags); 1875 int pci_dev_specific_enable_acs(struct pci_dev *dev); 1876 #else 1877 static inline void pci_fixup_device(enum pci_fixup_pass pass, 1878 struct pci_dev *dev) { } 1879 static inline int pci_dev_specific_acs_enabled(struct pci_dev *dev, 1880 u16 acs_flags) 1881 { 1882 return -ENOTTY; 1883 } 1884 static inline int pci_dev_specific_enable_acs(struct pci_dev *dev) 1885 { 1886 return -ENOTTY; 1887 } 1888 #endif 1889 1890 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen); 1891 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr); 1892 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev); 1893 int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name); 1894 int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask, 1895 const char *name); 1896 void pcim_iounmap_regions(struct pci_dev *pdev, int mask); 1897 1898 extern int pci_pci_problems; 1899 #define PCIPCI_FAIL 1 /* No PCI PCI DMA */ 1900 #define PCIPCI_TRITON 2 1901 #define PCIPCI_NATOMA 4 1902 #define PCIPCI_VIAETBF 8 1903 #define PCIPCI_VSFX 16 1904 #define PCIPCI_ALIMAGIK 32 /* Need low latency setting */ 1905 #define PCIAGP_FAIL 64 /* No PCI to AGP DMA */ 1906 1907 extern unsigned long pci_cardbus_io_size; 1908 extern unsigned long pci_cardbus_mem_size; 1909 extern u8 pci_dfl_cache_line_size; 1910 extern u8 pci_cache_line_size; 1911 1912 extern unsigned long pci_hotplug_io_size; 1913 extern unsigned long pci_hotplug_mem_size; 1914 extern unsigned long pci_hotplug_bus_size; 1915 1916 /* Architecture-specific versions may override these (weak) */ 1917 void pcibios_disable_device(struct pci_dev *dev); 1918 void pcibios_set_master(struct pci_dev *dev); 1919 int pcibios_set_pcie_reset_state(struct pci_dev *dev, 1920 enum pcie_reset_state state); 1921 int pcibios_add_device(struct pci_dev *dev); 1922 void pcibios_release_device(struct pci_dev *dev); 1923 void pcibios_penalize_isa_irq(int irq, int active); 1924 int pcibios_alloc_irq(struct pci_dev *dev); 1925 void pcibios_free_irq(struct pci_dev *dev); 1926 1927 #ifdef CONFIG_HIBERNATE_CALLBACKS 1928 extern struct dev_pm_ops pcibios_pm_ops; 1929 #endif 1930 1931 #if defined(CONFIG_PCI_MMCONFIG) || defined(CONFIG_ACPI_MCFG) 1932 void __init pci_mmcfg_early_init(void); 1933 void __init pci_mmcfg_late_init(void); 1934 #else 1935 static inline void pci_mmcfg_early_init(void) { } 1936 static inline void pci_mmcfg_late_init(void) { } 1937 #endif 1938 1939 int pci_ext_cfg_avail(void); 1940 1941 void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar); 1942 void __iomem *pci_ioremap_wc_bar(struct pci_dev *pdev, int bar); 1943 1944 #ifdef CONFIG_PCI_IOV 1945 int pci_iov_virtfn_bus(struct pci_dev *dev, int id); 1946 int pci_iov_virtfn_devfn(struct pci_dev *dev, int id); 1947 1948 int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn); 1949 void pci_disable_sriov(struct pci_dev *dev); 1950 int pci_iov_add_virtfn(struct pci_dev *dev, int id); 1951 void pci_iov_remove_virtfn(struct pci_dev *dev, int id); 1952 int pci_num_vf(struct pci_dev *dev); 1953 int pci_vfs_assigned(struct pci_dev *dev); 1954 int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs); 1955 int pci_sriov_get_totalvfs(struct pci_dev *dev); 1956 resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno); 1957 void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe); 1958 #else 1959 static inline int pci_iov_virtfn_bus(struct pci_dev *dev, int id) 1960 { 1961 return -ENOSYS; 1962 } 1963 static inline int pci_iov_virtfn_devfn(struct pci_dev *dev, int id) 1964 { 1965 return -ENOSYS; 1966 } 1967 static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn) 1968 { return -ENODEV; } 1969 static inline int pci_iov_add_virtfn(struct pci_dev *dev, int id) 1970 { 1971 return -ENOSYS; 1972 } 1973 static inline void pci_iov_remove_virtfn(struct pci_dev *dev, 1974 int id) { } 1975 static inline void pci_disable_sriov(struct pci_dev *dev) { } 1976 static inline int pci_num_vf(struct pci_dev *dev) { return 0; } 1977 static inline int pci_vfs_assigned(struct pci_dev *dev) 1978 { return 0; } 1979 static inline int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs) 1980 { return 0; } 1981 static inline int pci_sriov_get_totalvfs(struct pci_dev *dev) 1982 { return 0; } 1983 static inline resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno) 1984 { return 0; } 1985 static inline void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe) { } 1986 #endif 1987 1988 #if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE) 1989 void pci_hp_create_module_link(struct pci_slot *pci_slot); 1990 void pci_hp_remove_module_link(struct pci_slot *pci_slot); 1991 #endif 1992 1993 /** 1994 * pci_pcie_cap - get the saved PCIe capability offset 1995 * @dev: PCI device 1996 * 1997 * PCIe capability offset is calculated at PCI device initialization 1998 * time and saved in the data structure. This function returns saved 1999 * PCIe capability offset. Using this instead of pci_find_capability() 2000 * reduces unnecessary search in the PCI configuration space. If you 2001 * need to calculate PCIe capability offset from raw device for some 2002 * reasons, please use pci_find_capability() instead. 2003 */ 2004 static inline int pci_pcie_cap(struct pci_dev *dev) 2005 { 2006 return dev->pcie_cap; 2007 } 2008 2009 /** 2010 * pci_is_pcie - check if the PCI device is PCI Express capable 2011 * @dev: PCI device 2012 * 2013 * Returns: true if the PCI device is PCI Express capable, false otherwise. 2014 */ 2015 static inline bool pci_is_pcie(struct pci_dev *dev) 2016 { 2017 return pci_pcie_cap(dev); 2018 } 2019 2020 /** 2021 * pcie_caps_reg - get the PCIe Capabilities Register 2022 * @dev: PCI device 2023 */ 2024 static inline u16 pcie_caps_reg(const struct pci_dev *dev) 2025 { 2026 return dev->pcie_flags_reg; 2027 } 2028 2029 /** 2030 * pci_pcie_type - get the PCIe device/port type 2031 * @dev: PCI device 2032 */ 2033 static inline int pci_pcie_type(const struct pci_dev *dev) 2034 { 2035 return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4; 2036 } 2037 2038 static inline struct pci_dev *pcie_find_root_port(struct pci_dev *dev) 2039 { 2040 while (1) { 2041 if (!pci_is_pcie(dev)) 2042 break; 2043 if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT) 2044 return dev; 2045 if (!dev->bus->self) 2046 break; 2047 dev = dev->bus->self; 2048 } 2049 return NULL; 2050 } 2051 2052 void pci_request_acs(void); 2053 bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags); 2054 bool pci_acs_path_enabled(struct pci_dev *start, 2055 struct pci_dev *end, u16 acs_flags); 2056 int pci_enable_atomic_ops_to_root(struct pci_dev *dev, u32 cap_mask); 2057 2058 #define PCI_VPD_LRDT 0x80 /* Large Resource Data Type */ 2059 #define PCI_VPD_LRDT_ID(x) ((x) | PCI_VPD_LRDT) 2060 2061 /* Large Resource Data Type Tag Item Names */ 2062 #define PCI_VPD_LTIN_ID_STRING 0x02 /* Identifier String */ 2063 #define PCI_VPD_LTIN_RO_DATA 0x10 /* Read-Only Data */ 2064 #define PCI_VPD_LTIN_RW_DATA 0x11 /* Read-Write Data */ 2065 2066 #define PCI_VPD_LRDT_ID_STRING PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING) 2067 #define PCI_VPD_LRDT_RO_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA) 2068 #define PCI_VPD_LRDT_RW_DATA PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA) 2069 2070 /* Small Resource Data Type Tag Item Names */ 2071 #define PCI_VPD_STIN_END 0x0f /* End */ 2072 2073 #define PCI_VPD_SRDT_END (PCI_VPD_STIN_END << 3) 2074 2075 #define PCI_VPD_SRDT_TIN_MASK 0x78 2076 #define PCI_VPD_SRDT_LEN_MASK 0x07 2077 #define PCI_VPD_LRDT_TIN_MASK 0x7f 2078 2079 #define PCI_VPD_LRDT_TAG_SIZE 3 2080 #define PCI_VPD_SRDT_TAG_SIZE 1 2081 2082 #define PCI_VPD_INFO_FLD_HDR_SIZE 3 2083 2084 #define PCI_VPD_RO_KEYWORD_PARTNO "PN" 2085 #define PCI_VPD_RO_KEYWORD_MFR_ID "MN" 2086 #define PCI_VPD_RO_KEYWORD_VENDOR0 "V0" 2087 #define PCI_VPD_RO_KEYWORD_CHKSUM "RV" 2088 2089 /** 2090 * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length 2091 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag 2092 * 2093 * Returns the extracted Large Resource Data Type length. 2094 */ 2095 static inline u16 pci_vpd_lrdt_size(const u8 *lrdt) 2096 { 2097 return (u16)lrdt[1] + ((u16)lrdt[2] << 8); 2098 } 2099 2100 /** 2101 * pci_vpd_lrdt_tag - Extracts the Large Resource Data Type Tag Item 2102 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag 2103 * 2104 * Returns the extracted Large Resource Data Type Tag item. 2105 */ 2106 static inline u16 pci_vpd_lrdt_tag(const u8 *lrdt) 2107 { 2108 return (u16)(lrdt[0] & PCI_VPD_LRDT_TIN_MASK); 2109 } 2110 2111 /** 2112 * pci_vpd_srdt_size - Extracts the Small Resource Data Type length 2113 * @srdt: Pointer to the beginning of the Small Resource Data Type tag 2114 * 2115 * Returns the extracted Small Resource Data Type length. 2116 */ 2117 static inline u8 pci_vpd_srdt_size(const u8 *srdt) 2118 { 2119 return (*srdt) & PCI_VPD_SRDT_LEN_MASK; 2120 } 2121 2122 /** 2123 * pci_vpd_srdt_tag - Extracts the Small Resource Data Type Tag Item 2124 * @srdt: Pointer to the beginning of the Small Resource Data Type tag 2125 * 2126 * Returns the extracted Small Resource Data Type Tag Item. 2127 */ 2128 static inline u8 pci_vpd_srdt_tag(const u8 *srdt) 2129 { 2130 return ((*srdt) & PCI_VPD_SRDT_TIN_MASK) >> 3; 2131 } 2132 2133 /** 2134 * pci_vpd_info_field_size - Extracts the information field length 2135 * @lrdt: Pointer to the beginning of an information field header 2136 * 2137 * Returns the extracted information field length. 2138 */ 2139 static inline u8 pci_vpd_info_field_size(const u8 *info_field) 2140 { 2141 return info_field[2]; 2142 } 2143 2144 /** 2145 * pci_vpd_find_tag - Locates the Resource Data Type tag provided 2146 * @buf: Pointer to buffered vpd data 2147 * @off: The offset into the buffer at which to begin the search 2148 * @len: The length of the vpd buffer 2149 * @rdt: The Resource Data Type to search for 2150 * 2151 * Returns the index where the Resource Data Type was found or 2152 * -ENOENT otherwise. 2153 */ 2154 int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt); 2155 2156 /** 2157 * pci_vpd_find_info_keyword - Locates an information field keyword in the VPD 2158 * @buf: Pointer to buffered vpd data 2159 * @off: The offset into the buffer at which to begin the search 2160 * @len: The length of the buffer area, relative to off, in which to search 2161 * @kw: The keyword to search for 2162 * 2163 * Returns the index where the information field keyword was found or 2164 * -ENOENT otherwise. 2165 */ 2166 int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off, 2167 unsigned int len, const char *kw); 2168 2169 /* PCI <-> OF binding helpers */ 2170 #ifdef CONFIG_OF 2171 struct device_node; 2172 struct irq_domain; 2173 void pci_set_of_node(struct pci_dev *dev); 2174 void pci_release_of_node(struct pci_dev *dev); 2175 void pci_set_bus_of_node(struct pci_bus *bus); 2176 void pci_release_bus_of_node(struct pci_bus *bus); 2177 struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus); 2178 int pci_parse_request_of_pci_ranges(struct device *dev, 2179 struct list_head *resources, 2180 struct resource **bus_range); 2181 2182 /* Arch may override this (weak) */ 2183 struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus); 2184 2185 static inline struct device_node * 2186 pci_device_to_OF_node(const struct pci_dev *pdev) 2187 { 2188 return pdev ? pdev->dev.of_node : NULL; 2189 } 2190 2191 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus) 2192 { 2193 return bus ? bus->dev.of_node : NULL; 2194 } 2195 2196 #else /* CONFIG_OF */ 2197 static inline void pci_set_of_node(struct pci_dev *dev) { } 2198 static inline void pci_release_of_node(struct pci_dev *dev) { } 2199 static inline void pci_set_bus_of_node(struct pci_bus *bus) { } 2200 static inline void pci_release_bus_of_node(struct pci_bus *bus) { } 2201 static inline struct device_node * 2202 pci_device_to_OF_node(const struct pci_dev *pdev) { return NULL; } 2203 static inline struct irq_domain * 2204 pci_host_bridge_of_msi_domain(struct pci_bus *bus) { return NULL; } 2205 static inline int pci_parse_request_of_pci_ranges(struct device *dev, 2206 struct list_head *resources, 2207 struct resource **bus_range) 2208 { 2209 return -EINVAL; 2210 } 2211 #endif /* CONFIG_OF */ 2212 2213 #ifdef CONFIG_ACPI 2214 struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus); 2215 2216 void 2217 pci_msi_register_fwnode_provider(struct fwnode_handle *(*fn)(struct device *)); 2218 #else 2219 static inline struct irq_domain * 2220 pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) { return NULL; } 2221 #endif 2222 2223 #ifdef CONFIG_EEH 2224 static inline struct eeh_dev *pci_dev_to_eeh_dev(struct pci_dev *pdev) 2225 { 2226 return pdev->dev.archdata.edev; 2227 } 2228 #endif 2229 2230 void pci_add_dma_alias(struct pci_dev *dev, u8 devfn); 2231 bool pci_devs_are_dma_aliases(struct pci_dev *dev1, struct pci_dev *dev2); 2232 int pci_for_each_dma_alias(struct pci_dev *pdev, 2233 int (*fn)(struct pci_dev *pdev, 2234 u16 alias, void *data), void *data); 2235 2236 /* Helper functions for operation of device flag */ 2237 static inline void pci_set_dev_assigned(struct pci_dev *pdev) 2238 { 2239 pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED; 2240 } 2241 static inline void pci_clear_dev_assigned(struct pci_dev *pdev) 2242 { 2243 pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED; 2244 } 2245 static inline bool pci_is_dev_assigned(struct pci_dev *pdev) 2246 { 2247 return (pdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED) == PCI_DEV_FLAGS_ASSIGNED; 2248 } 2249 2250 /** 2251 * pci_ari_enabled - query ARI forwarding status 2252 * @bus: the PCI bus 2253 * 2254 * Returns true if ARI forwarding is enabled. 2255 */ 2256 static inline bool pci_ari_enabled(struct pci_bus *bus) 2257 { 2258 return bus->self && bus->self->ari_enabled; 2259 } 2260 2261 /** 2262 * pci_is_thunderbolt_attached - whether device is on a Thunderbolt daisy chain 2263 * @pdev: PCI device to check 2264 * 2265 * Walk upwards from @pdev and check for each encountered bridge if it's part 2266 * of a Thunderbolt controller. Reaching the host bridge means @pdev is not 2267 * Thunderbolt-attached. (But rather soldered to the mainboard usually.) 2268 */ 2269 static inline bool pci_is_thunderbolt_attached(struct pci_dev *pdev) 2270 { 2271 struct pci_dev *parent = pdev; 2272 2273 if (pdev->is_thunderbolt) 2274 return true; 2275 2276 while ((parent = pci_upstream_bridge(parent))) 2277 if (parent->is_thunderbolt) 2278 return true; 2279 2280 return false; 2281 } 2282 2283 /** 2284 * pci_uevent_ers - emit a uevent during recovery path of pci device 2285 * @pdev: pci device to check 2286 * @err_type: type of error event 2287 * 2288 */ 2289 static inline void pci_uevent_ers(struct pci_dev *pdev, 2290 enum pci_ers_result err_type) 2291 { 2292 int idx = 0; 2293 char *envp[3]; 2294 2295 switch (err_type) { 2296 case PCI_ERS_RESULT_NONE: 2297 case PCI_ERS_RESULT_CAN_RECOVER: 2298 envp[idx++] = "ERROR_EVENT=BEGIN_RECOVERY"; 2299 envp[idx++] = "DEVICE_ONLINE=0"; 2300 break; 2301 case PCI_ERS_RESULT_RECOVERED: 2302 envp[idx++] = "ERROR_EVENT=SUCCESSFUL_RECOVERY"; 2303 envp[idx++] = "DEVICE_ONLINE=1"; 2304 break; 2305 case PCI_ERS_RESULT_DISCONNECT: 2306 envp[idx++] = "ERROR_EVENT=FAILED_RECOVERY"; 2307 envp[idx++] = "DEVICE_ONLINE=0"; 2308 break; 2309 default: 2310 break; 2311 } 2312 2313 if (idx > 0) { 2314 envp[idx++] = NULL; 2315 kobject_uevent_env(&pdev->dev.kobj, KOBJ_CHANGE, envp); 2316 } 2317 } 2318 2319 /* Provide the legacy pci_dma_* API */ 2320 #include <linux/pci-dma-compat.h> 2321 2322 #define pci_printk(level, pdev, fmt, arg...) \ 2323 dev_printk(level, &(pdev)->dev, fmt, ##arg) 2324 2325 #define pci_emerg(pdev, fmt, arg...) dev_emerg(&(pdev)->dev, fmt, ##arg) 2326 #define pci_alert(pdev, fmt, arg...) dev_alert(&(pdev)->dev, fmt, ##arg) 2327 #define pci_crit(pdev, fmt, arg...) dev_crit(&(pdev)->dev, fmt, ##arg) 2328 #define pci_err(pdev, fmt, arg...) dev_err(&(pdev)->dev, fmt, ##arg) 2329 #define pci_warn(pdev, fmt, arg...) dev_warn(&(pdev)->dev, fmt, ##arg) 2330 #define pci_notice(pdev, fmt, arg...) dev_notice(&(pdev)->dev, fmt, ##arg) 2331 #define pci_info(pdev, fmt, arg...) dev_info(&(pdev)->dev, fmt, ##arg) 2332 #define pci_dbg(pdev, fmt, arg...) dev_dbg(&(pdev)->dev, fmt, ##arg) 2333 2334 #endif /* LINUX_PCI_H */ 2335