1 /* $FreeBSD$ */ 2 /** @file 3 EFI PCI I/O Protocol provides the basic Memory, I/O, PCI configuration, 4 and DMA interfaces that a driver uses to access its PCI controller. 5 6 Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR> 7 This program and the accompanying materials 8 are licensed and made available under the terms and conditions of the BSD License 9 which accompanies this distribution. The full text of the license may be found at 10 http://opensource.org/licenses/bsd-license.php 11 12 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 13 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 14 15 **/ 16 17 #ifndef __PCI_IO_H__ 18 #define __PCI_IO_H__ 19 20 #define EFI_PCI_ROOT_IO_GUID \ 21 { 0x2F707EBB, 0x4A1A, 0x11d4, { 0x9A, 0x38, 0x00, 0x90, 0x27, 0x3F, 0xC1, 0x4D }} 22 23 /// 24 /// Global ID for the PCI I/O Protocol 25 /// 26 #define EFI_PCI_IO_PROTOCOL_GUID \ 27 { 0x4cf5b200, 0x68b8, 0x4ca5, {0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x2, 0x9a} } 28 29 typedef struct _EFI_PCI_IO_PROTOCOL EFI_PCI_IO_PROTOCOL; 30 31 /// 32 /// ******************************************************* 33 /// EFI_PCI_IO_PROTOCOL_WIDTH 34 /// ******************************************************* 35 /// 36 typedef enum { 37 EfiPciIoWidthUint8 = 0, 38 EfiPciIoWidthUint16, 39 EfiPciIoWidthUint32, 40 EfiPciIoWidthUint64, 41 EfiPciIoWidthFifoUint8, 42 EfiPciIoWidthFifoUint16, 43 EfiPciIoWidthFifoUint32, 44 EfiPciIoWidthFifoUint64, 45 EfiPciIoWidthFillUint8, 46 EfiPciIoWidthFillUint16, 47 EfiPciIoWidthFillUint32, 48 EfiPciIoWidthFillUint64, 49 EfiPciIoWidthMaximum 50 } EFI_PCI_IO_PROTOCOL_WIDTH; 51 52 // 53 // Complete PCI address generater 54 // 55 #define EFI_PCI_IO_PASS_THROUGH_BAR 0xff ///< Special BAR that passes a memory or I/O cycle through unchanged 56 #define EFI_PCI_IO_ATTRIBUTE_MASK 0x077f ///< All the following I/O and Memory cycles 57 #define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001 ///< I/O cycles 0x0000-0x00FF (10 bit decode) 58 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002 ///< I/O cycles 0x0100-0x03FF or greater (10 bit decode) 59 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004 ///< I/O cycles 0x3C6, 0x3C8, 0x3C9 (10 bit decode) 60 #define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008 ///< MEM cycles 0xA0000-0xBFFFF (24 bit decode) 61 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010 ///< I/O cycles 0x3B0-0x3BB and 0x3C0-0x3DF (10 bit decode) 62 #define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020 ///< I/O cycles 0x1F0-0x1F7, 0x3F6, 0x3F7 (10 bit decode) 63 #define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040 ///< I/O cycles 0x170-0x177, 0x376, 0x377 (10 bit decode) 64 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080 ///< Map a memory range so writes are combined 65 #define EFI_PCI_IO_ATTRIBUTE_IO 0x0100 ///< Enable the I/O decode bit in the PCI Config Header 66 #define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200 ///< Enable the Memory decode bit in the PCI Config Header 67 #define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400 ///< Enable the DMA bit in the PCI Config Header 68 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800 ///< Map a memory range so all r/w accesses are cached 69 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000 ///< Disable a memory range 70 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000 ///< Clear for an add-in PCI Device 71 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000 ///< Clear for a physical PCI Option ROM accessed through ROM BAR 72 #define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000 ///< Clear for PCI controllers that can not genrate a DAC 73 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000 ///< I/O cycles 0x0100-0x03FF or greater (16 bit decode) 74 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000 ///< I/O cycles 0x3C6, 0x3C8, 0x3C9 (16 bit decode) 75 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000 ///< I/O cycles 0x3B0-0x3BB and 0x3C0-0x3DF (16 bit decode) 76 77 #define EFI_PCI_DEVICE_ENABLE (EFI_PCI_IO_ATTRIBUTE_IO | EFI_PCI_IO_ATTRIBUTE_MEMORY | EFI_PCI_IO_ATTRIBUTE_BUS_MASTER) 78 #define EFI_VGA_DEVICE_ENABLE (EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO | EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY | EFI_PCI_IO_ATTRIBUTE_VGA_IO | EFI_PCI_IO_ATTRIBUTE_IO) 79 80 /// 81 /// ******************************************************* 82 /// EFI_PCI_IO_PROTOCOL_OPERATION 83 /// ******************************************************* 84 /// 85 typedef enum { 86 /// 87 /// A read operation from system memory by a bus master. 88 /// 89 EfiPciIoOperationBusMasterRead, 90 /// 91 /// A write operation from system memory by a bus master. 92 /// 93 EfiPciIoOperationBusMasterWrite, 94 /// 95 /// Provides both read and write access to system memory by both the processor and a 96 /// bus master. The buffer is coherent from both the processor's and the bus master's point of view. 97 /// 98 EfiPciIoOperationBusMasterCommonBuffer, 99 EfiPciIoOperationMaximum 100 } EFI_PCI_IO_PROTOCOL_OPERATION; 101 102 /// 103 /// ******************************************************* 104 /// EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION 105 /// ******************************************************* 106 /// 107 typedef enum { 108 /// 109 /// Retrieve the PCI controller's current attributes, and return them in Result. 110 /// 111 EfiPciIoAttributeOperationGet, 112 /// 113 /// Set the PCI controller's current attributes to Attributes. 114 /// 115 EfiPciIoAttributeOperationSet, 116 /// 117 /// Enable the attributes specified by the bits that are set in Attributes for this PCI controller. 118 /// 119 EfiPciIoAttributeOperationEnable, 120 /// 121 /// Disable the attributes specified by the bits that are set in Attributes for this PCI controller. 122 /// 123 EfiPciIoAttributeOperationDisable, 124 /// 125 /// Retrieve the PCI controller's supported attributes, and return them in Result. 126 /// 127 EfiPciIoAttributeOperationSupported, 128 EfiPciIoAttributeOperationMaximum 129 } EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION; 130 131 /** 132 Reads from the memory space of a PCI controller. Returns either when the polling exit criteria is 133 satisfied or after a defined duration. 134 135 @param This A pointer to the EFI_PCI_IO_PROTOCOL instance. 136 @param Width Signifies the width of the memory or I/O operations. 137 @param BarIndex The BAR index of the standard PCI Configuration header to use as the 138 base address for the memory operation to perform. 139 @param Offset The offset within the selected BAR to start the memory operation. 140 @param Mask Mask used for the polling criteria. 141 @param Value The comparison value used for the polling exit criteria. 142 @param Delay The number of 100 ns units to poll. 143 @param Result Pointer to the last value read from the memory location. 144 145 @retval EFI_SUCCESS The last data returned from the access matched the poll exit criteria. 146 @retval EFI_UNSUPPORTED BarIndex not valid for this PCI controller. 147 @retval EFI_UNSUPPORTED Offset is not valid for the BarIndex of this PCI controller. 148 @retval EFI_TIMEOUT Delay expired before a match occurred. 149 @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources. 150 @retval EFI_INVALID_PARAMETER One or more parameters are invalid. 151 152 **/ 153 typedef 154 EFI_STATUS 155 (EFIAPI *EFI_PCI_IO_PROTOCOL_POLL_IO_MEM)( 156 IN EFI_PCI_IO_PROTOCOL *This, 157 IN EFI_PCI_IO_PROTOCOL_WIDTH Width, 158 IN UINT8 BarIndex, 159 IN UINT64 Offset, 160 IN UINT64 Mask, 161 IN UINT64 Value, 162 IN UINT64 Delay, 163 OUT UINT64 *Result 164 ); 165 166 /** 167 Enable a PCI driver to access PCI controller registers in the PCI memory or I/O space. 168 169 @param This A pointer to the EFI_PCI_IO_PROTOCOL instance. 170 @param Width Signifies the width of the memory or I/O operations. 171 @param BarIndex The BAR index of the standard PCI Configuration header to use as the 172 base address for the memory or I/O operation to perform. 173 @param Offset The offset within the selected BAR to start the memory or I/O operation. 174 @param Count The number of memory or I/O operations to perform. 175 @param Buffer For read operations, the destination buffer to store the results. For write 176 operations, the source buffer to write data from. 177 178 @retval EFI_SUCCESS The data was read from or written to the PCI controller. 179 @retval EFI_UNSUPPORTED BarIndex not valid for this PCI controller. 180 @retval EFI_UNSUPPORTED The address range specified by Offset, Width, and Count is not 181 valid for the PCI BAR specified by BarIndex. 182 @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources. 183 @retval EFI_INVALID_PARAMETER One or more parameters are invalid. 184 185 **/ 186 typedef 187 EFI_STATUS 188 (EFIAPI *EFI_PCI_IO_PROTOCOL_IO_MEM)( 189 IN EFI_PCI_IO_PROTOCOL *This, 190 IN EFI_PCI_IO_PROTOCOL_WIDTH Width, 191 IN UINT8 BarIndex, 192 IN UINT64 Offset, 193 IN UINTN Count, 194 IN OUT VOID *Buffer 195 ); 196 197 typedef struct { 198 /// 199 /// Read PCI controller registers in the PCI memory or I/O space. 200 /// 201 EFI_PCI_IO_PROTOCOL_IO_MEM Read; 202 /// 203 /// Write PCI controller registers in the PCI memory or I/O space. 204 /// 205 EFI_PCI_IO_PROTOCOL_IO_MEM Write; 206 } EFI_PCI_IO_PROTOCOL_ACCESS; 207 208 /** 209 Enable a PCI driver to access PCI controller registers in PCI configuration space. 210 211 @param This A pointer to the EFI_PCI_IO_PROTOCOL instance. 212 @param Width Signifies the width of the memory operations. 213 @param Offset The offset within the PCI configuration space for the PCI controller. 214 @param Count The number of PCI configuration operations to perform. 215 @param Buffer For read operations, the destination buffer to store the results. For write 216 operations, the source buffer to write data from. 217 218 219 @retval EFI_SUCCESS The data was read from or written to the PCI controller. 220 @retval EFI_UNSUPPORTED The address range specified by Offset, Width, and Count is not 221 valid for the PCI configuration header of the PCI controller. 222 @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources. 223 @retval EFI_INVALID_PARAMETER Buffer is NULL or Width is invalid. 224 225 **/ 226 typedef 227 EFI_STATUS 228 (EFIAPI *EFI_PCI_IO_PROTOCOL_CONFIG)( 229 IN EFI_PCI_IO_PROTOCOL *This, 230 IN EFI_PCI_IO_PROTOCOL_WIDTH Width, 231 IN UINT32 Offset, 232 IN UINTN Count, 233 IN OUT VOID *Buffer 234 ); 235 236 typedef struct { 237 /// 238 /// Read PCI controller registers in PCI configuration space. 239 /// 240 EFI_PCI_IO_PROTOCOL_CONFIG Read; 241 /// 242 /// Write PCI controller registers in PCI configuration space. 243 /// 244 EFI_PCI_IO_PROTOCOL_CONFIG Write; 245 } EFI_PCI_IO_PROTOCOL_CONFIG_ACCESS; 246 247 /** 248 Enables a PCI driver to copy one region of PCI memory space to another region of PCI 249 memory space. 250 251 @param This A pointer to the EFI_PCI_IO_PROTOCOL instance. 252 @param Width Signifies the width of the memory operations. 253 @param DestBarIndex The BAR index in the standard PCI Configuration header to use as the 254 base address for the memory operation to perform. 255 @param DestOffset The destination offset within the BAR specified by DestBarIndex to 256 start the memory writes for the copy operation. 257 @param SrcBarIndex The BAR index in the standard PCI Configuration header to use as the 258 base address for the memory operation to perform. 259 @param SrcOffset The source offset within the BAR specified by SrcBarIndex to start 260 the memory reads for the copy operation. 261 @param Count The number of memory operations to perform. Bytes moved is Width 262 size * Count, starting at DestOffset and SrcOffset. 263 264 @retval EFI_SUCCESS The data was copied from one memory region to another memory region. 265 @retval EFI_UNSUPPORTED DestBarIndex not valid for this PCI controller. 266 @retval EFI_UNSUPPORTED SrcBarIndex not valid for this PCI controller. 267 @retval EFI_UNSUPPORTED The address range specified by DestOffset, Width, and Count 268 is not valid for the PCI BAR specified by DestBarIndex. 269 @retval EFI_UNSUPPORTED The address range specified by SrcOffset, Width, and Count is 270 not valid for the PCI BAR specified by SrcBarIndex. 271 @retval EFI_INVALID_PARAMETER Width is invalid. 272 @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources. 273 274 **/ 275 typedef 276 EFI_STATUS 277 (EFIAPI *EFI_PCI_IO_PROTOCOL_COPY_MEM)( 278 IN EFI_PCI_IO_PROTOCOL *This, 279 IN EFI_PCI_IO_PROTOCOL_WIDTH Width, 280 IN UINT8 DestBarIndex, 281 IN UINT64 DestOffset, 282 IN UINT8 SrcBarIndex, 283 IN UINT64 SrcOffset, 284 IN UINTN Count 285 ); 286 287 /** 288 Provides the PCI controller-specific addresses needed to access system memory. 289 290 @param This A pointer to the EFI_PCI_IO_PROTOCOL instance. 291 @param Operation Indicates if the bus master is going to read or write to system memory. 292 @param HostAddress The system memory address to map to the PCI controller. 293 @param NumberOfBytes On input the number of bytes to map. On output the number of bytes 294 that were mapped. 295 @param DeviceAddress The resulting map address for the bus master PCI controller to use to 296 access the hosts HostAddress. 297 @param Mapping A resulting value to pass to Unmap(). 298 299 @retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes. 300 @retval EFI_UNSUPPORTED The HostAddress cannot be mapped as a common buffer. 301 @retval EFI_INVALID_PARAMETER One or more parameters are invalid. 302 @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources. 303 @retval EFI_DEVICE_ERROR The system hardware could not map the requested address. 304 305 **/ 306 typedef 307 EFI_STATUS 308 (EFIAPI *EFI_PCI_IO_PROTOCOL_MAP)( 309 IN EFI_PCI_IO_PROTOCOL *This, 310 IN EFI_PCI_IO_PROTOCOL_OPERATION Operation, 311 IN VOID *HostAddress, 312 IN OUT UINTN *NumberOfBytes, 313 OUT EFI_PHYSICAL_ADDRESS *DeviceAddress, 314 OUT VOID **Mapping 315 ); 316 317 /** 318 Completes the Map() operation and releases any corresponding resources. 319 320 @param This A pointer to the EFI_PCI_IO_PROTOCOL instance. 321 @param Mapping The mapping value returned from Map(). 322 323 @retval EFI_SUCCESS The range was unmapped. 324 @retval EFI_DEVICE_ERROR The data was not committed to the target system memory. 325 326 **/ 327 typedef 328 EFI_STATUS 329 (EFIAPI *EFI_PCI_IO_PROTOCOL_UNMAP)( 330 IN EFI_PCI_IO_PROTOCOL *This, 331 IN VOID *Mapping 332 ); 333 334 /** 335 Allocates pages that are suitable for an EfiPciIoOperationBusMasterCommonBuffer 336 mapping. 337 338 @param This A pointer to the EFI_PCI_IO_PROTOCOL instance. 339 @param Type This parameter is not used and must be ignored. 340 @param MemoryType The type of memory to allocate, EfiBootServicesData or 341 EfiRuntimeServicesData. 342 @param Pages The number of pages to allocate. 343 @param HostAddress A pointer to store the base system memory address of the 344 allocated range. 345 @param Attributes The requested bit mask of attributes for the allocated range. 346 347 @retval EFI_SUCCESS The requested memory pages were allocated. 348 @retval EFI_UNSUPPORTED Attributes is unsupported. The only legal attribute bits are 349 MEMORY_WRITE_COMBINE and MEMORY_CACHED. 350 @retval EFI_INVALID_PARAMETER One or more parameters are invalid. 351 @retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated. 352 353 **/ 354 typedef 355 EFI_STATUS 356 (EFIAPI *EFI_PCI_IO_PROTOCOL_ALLOCATE_BUFFER)( 357 IN EFI_PCI_IO_PROTOCOL *This, 358 IN EFI_ALLOCATE_TYPE Type, 359 IN EFI_MEMORY_TYPE MemoryType, 360 IN UINTN Pages, 361 OUT VOID **HostAddress, 362 IN UINT64 Attributes 363 ); 364 365 /** 366 Frees memory that was allocated with AllocateBuffer(). 367 368 @param This A pointer to the EFI_PCI_IO_PROTOCOL instance. 369 @param Pages The number of pages to free. 370 @param HostAddress The base system memory address of the allocated range. 371 372 @retval EFI_SUCCESS The requested memory pages were freed. 373 @retval EFI_INVALID_PARAMETER The memory range specified by HostAddress and Pages 374 was not allocated with AllocateBuffer(). 375 376 **/ 377 typedef 378 EFI_STATUS 379 (EFIAPI *EFI_PCI_IO_PROTOCOL_FREE_BUFFER)( 380 IN EFI_PCI_IO_PROTOCOL *This, 381 IN UINTN Pages, 382 IN VOID *HostAddress 383 ); 384 385 /** 386 Flushes all PCI posted write transactions from a PCI host bridge to system memory. 387 388 @param This A pointer to the EFI_PCI_IO_PROTOCOL instance. 389 390 @retval EFI_SUCCESS The PCI posted write transactions were flushed from the PCI host 391 bridge to system memory. 392 @retval EFI_DEVICE_ERROR The PCI posted write transactions were not flushed from the PCI 393 host bridge due to a hardware error. 394 395 **/ 396 typedef 397 EFI_STATUS 398 (EFIAPI *EFI_PCI_IO_PROTOCOL_FLUSH)( 399 IN EFI_PCI_IO_PROTOCOL *This 400 ); 401 402 /** 403 Retrieves this PCI controller's current PCI bus number, device number, and function number. 404 405 @param This A pointer to the EFI_PCI_IO_PROTOCOL instance. 406 @param SegmentNumber The PCI controller's current PCI segment number. 407 @param BusNumber The PCI controller's current PCI bus number. 408 @param DeviceNumber The PCI controller's current PCI device number. 409 @param FunctionNumber The PCI controller's current PCI function number. 410 411 @retval EFI_SUCCESS The PCI controller location was returned. 412 @retval EFI_INVALID_PARAMETER One or more parameters are invalid. 413 414 **/ 415 typedef 416 EFI_STATUS 417 (EFIAPI *EFI_PCI_IO_PROTOCOL_GET_LOCATION)( 418 IN EFI_PCI_IO_PROTOCOL *This, 419 OUT UINTN *SegmentNumber, 420 OUT UINTN *BusNumber, 421 OUT UINTN *DeviceNumber, 422 OUT UINTN *FunctionNumber 423 ); 424 425 /** 426 Performs an operation on the attributes that this PCI controller supports. The operations include 427 getting the set of supported attributes, retrieving the current attributes, setting the current 428 attributes, enabling attributes, and disabling attributes. 429 430 @param This A pointer to the EFI_PCI_IO_PROTOCOL instance. 431 @param Operation The operation to perform on the attributes for this PCI controller. 432 @param Attributes The mask of attributes that are used for Set, Enable, and Disable 433 operations. 434 @param Result A pointer to the result mask of attributes that are returned for the Get 435 and Supported operations. 436 437 @retval EFI_SUCCESS The operation on the PCI controller's attributes was completed. 438 @retval EFI_INVALID_PARAMETER One or more parameters are invalid. 439 @retval EFI_UNSUPPORTED one or more of the bits set in 440 Attributes are not supported by this PCI controller or one of 441 its parent bridges when Operation is Set, Enable or Disable. 442 443 **/ 444 typedef 445 EFI_STATUS 446 (EFIAPI *EFI_PCI_IO_PROTOCOL_ATTRIBUTES)( 447 IN EFI_PCI_IO_PROTOCOL *This, 448 IN EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION Operation, 449 IN UINT64 Attributes, 450 OUT UINT64 *Result OPTIONAL 451 ); 452 453 /** 454 Gets the attributes that this PCI controller supports setting on a BAR using 455 SetBarAttributes(), and retrieves the list of resource descriptors for a BAR. 456 457 @param This A pointer to the EFI_PCI_IO_PROTOCOL instance. 458 @param BarIndex The BAR index of the standard PCI Configuration header to use as the 459 base address for resource range. The legal range for this field is 0..5. 460 @param Supports A pointer to the mask of attributes that this PCI controller supports 461 setting for this BAR with SetBarAttributes(). 462 @param Resources A pointer to the ACPI 2.0 resource descriptors that describe the current 463 configuration of this BAR of the PCI controller. 464 465 @retval EFI_SUCCESS If Supports is not NULL, then the attributes that the PCI 466 controller supports are returned in Supports. If Resources 467 is not NULL, then the ACPI 2.0 resource descriptors that the PCI 468 controller is currently using are returned in Resources. 469 @retval EFI_INVALID_PARAMETER Both Supports and Attributes are NULL. 470 @retval EFI_UNSUPPORTED BarIndex not valid for this PCI controller. 471 @retval EFI_OUT_OF_RESOURCES There are not enough resources available to allocate 472 Resources. 473 474 **/ 475 typedef 476 EFI_STATUS 477 (EFIAPI *EFI_PCI_IO_PROTOCOL_GET_BAR_ATTRIBUTES)( 478 IN EFI_PCI_IO_PROTOCOL *This, 479 IN UINT8 BarIndex, 480 OUT UINT64 *Supports, OPTIONAL 481 OUT VOID **Resources OPTIONAL 482 ); 483 484 /** 485 Sets the attributes for a range of a BAR on a PCI controller. 486 487 @param This A pointer to the EFI_PCI_IO_PROTOCOL instance. 488 @param Attributes The mask of attributes to set for the resource range specified by 489 BarIndex, Offset, and Length. 490 @param BarIndex The BAR index of the standard PCI Configuration header to use as the 491 base address for resource range. The legal range for this field is 0..5. 492 @param Offset A pointer to the BAR relative base address of the resource range to be 493 modified by the attributes specified by Attributes. 494 @param Length A pointer to the length of the resource range to be modified by the 495 attributes specified by Attributes. 496 497 @retval EFI_SUCCESS The set of attributes specified by Attributes for the resource 498 range specified by BarIndex, Offset, and Length were 499 set on the PCI controller, and the actual resource range is returned 500 in Offset and Length. 501 @retval EFI_INVALID_PARAMETER Offset or Length is NULL. 502 @retval EFI_UNSUPPORTED BarIndex not valid for this PCI controller. 503 @retval EFI_OUT_OF_RESOURCES There are not enough resources to set the attributes on the 504 resource range specified by BarIndex, Offset, and 505 Length. 506 507 **/ 508 typedef 509 EFI_STATUS 510 (EFIAPI *EFI_PCI_IO_PROTOCOL_SET_BAR_ATTRIBUTES)( 511 IN EFI_PCI_IO_PROTOCOL *This, 512 IN UINT64 Attributes, 513 IN UINT8 BarIndex, 514 IN OUT UINT64 *Offset, 515 IN OUT UINT64 *Length 516 ); 517 518 /// 519 /// The EFI_PCI_IO_PROTOCOL provides the basic Memory, I/O, PCI configuration, 520 /// and DMA interfaces used to abstract accesses to PCI controllers. 521 /// There is one EFI_PCI_IO_PROTOCOL instance for each PCI controller on a PCI bus. 522 /// A device driver that wishes to manage a PCI controller in a system will have to 523 /// retrieve the EFI_PCI_IO_PROTOCOL instance that is associated with the PCI controller. 524 /// 525 struct _EFI_PCI_IO_PROTOCOL { 526 EFI_PCI_IO_PROTOCOL_POLL_IO_MEM PollMem; 527 EFI_PCI_IO_PROTOCOL_POLL_IO_MEM PollIo; 528 EFI_PCI_IO_PROTOCOL_ACCESS Mem; 529 EFI_PCI_IO_PROTOCOL_ACCESS Io; 530 EFI_PCI_IO_PROTOCOL_CONFIG_ACCESS Pci; 531 EFI_PCI_IO_PROTOCOL_COPY_MEM CopyMem; 532 EFI_PCI_IO_PROTOCOL_MAP Map; 533 EFI_PCI_IO_PROTOCOL_UNMAP Unmap; 534 EFI_PCI_IO_PROTOCOL_ALLOCATE_BUFFER AllocateBuffer; 535 EFI_PCI_IO_PROTOCOL_FREE_BUFFER FreeBuffer; 536 EFI_PCI_IO_PROTOCOL_FLUSH Flush; 537 EFI_PCI_IO_PROTOCOL_GET_LOCATION GetLocation; 538 EFI_PCI_IO_PROTOCOL_ATTRIBUTES Attributes; 539 EFI_PCI_IO_PROTOCOL_GET_BAR_ATTRIBUTES GetBarAttributes; 540 EFI_PCI_IO_PROTOCOL_SET_BAR_ATTRIBUTES SetBarAttributes; 541 542 /// 543 /// The size, in bytes, of the ROM image. 544 /// 545 UINT64 RomSize; 546 547 /// 548 /// A pointer to the in memory copy of the ROM image. The PCI Bus Driver is responsible 549 /// for allocating memory for the ROM image, and copying the contents of the ROM to memory. 550 /// The contents of this buffer are either from the PCI option ROM that can be accessed 551 /// through the ROM BAR of the PCI controller, or it is from a platform-specific location. 552 /// The Attributes() function can be used to determine from which of these two sources 553 /// the RomImage buffer was initialized. 554 /// 555 VOID *RomImage; 556 }; 557 558 extern EFI_GUID gEfiPciIoProtocolGuid; 559 560 #endif 561