1 /** @file 2 NvmExpressDxe driver is used to manage non-volatile memory subsystem which follows 3 NVM Express specification. 4 5 (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR> 6 Copyright (c) 2013 - 2016, 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 _EFI_NVM_EXPRESS_H_ 18 #define _EFI_NVM_EXPRESS_H_ 19 20 #include <Uefi.h> 21 22 #include <IndustryStandard/Pci.h> 23 #include <IndustryStandard/Nvme.h> 24 25 #include <Protocol/ComponentName.h> 26 #include <Protocol/ComponentName2.h> 27 #include <Protocol/DriverBinding.h> 28 #include <Protocol/LoadedImage.h> 29 #include <Protocol/DevicePath.h> 30 #include <Protocol/PciIo.h> 31 #include <Protocol/NvmExpressPassthru.h> 32 #include <Protocol/BlockIo.h> 33 #include <Protocol/BlockIo2.h> 34 #include <Protocol/DiskInfo.h> 35 #include <Protocol/DriverSupportedEfiVersion.h> 36 #include <Protocol/StorageSecurityCommand.h> 37 38 #include <Library/BaseLib.h> 39 #include <Library/BaseMemoryLib.h> 40 #include <Library/DebugLib.h> 41 #include <Library/PrintLib.h> 42 #include <Library/UefiLib.h> 43 #include <Library/DevicePathLib.h> 44 #include <Library/MemoryAllocationLib.h> 45 #include <Library/UefiBootServicesTableLib.h> 46 #include <Library/UefiDriverEntryPoint.h> 47 48 typedef struct _NVME_CONTROLLER_PRIVATE_DATA NVME_CONTROLLER_PRIVATE_DATA; 49 typedef struct _NVME_DEVICE_PRIVATE_DATA NVME_DEVICE_PRIVATE_DATA; 50 51 #include "NvmExpressBlockIo.h" 52 #include "NvmExpressDiskInfo.h" 53 #include "NvmExpressHci.h" 54 55 extern EFI_DRIVER_BINDING_PROTOCOL gNvmExpressDriverBinding; 56 extern EFI_COMPONENT_NAME_PROTOCOL gNvmExpressComponentName; 57 extern EFI_COMPONENT_NAME2_PROTOCOL gNvmExpressComponentName2; 58 extern EFI_DRIVER_SUPPORTED_EFI_VERSION_PROTOCOL gNvmExpressDriverSupportedEfiVersion; 59 60 #define PCI_CLASS_MASS_STORAGE_NVM 0x08 // mass storage sub-class non-volatile memory. 61 #define PCI_IF_NVMHCI 0x02 // mass storage programming interface NVMHCI. 62 63 #define NVME_ASQ_SIZE 1 // Number of admin submission queue entries, which is 0-based 64 #define NVME_ACQ_SIZE 1 // Number of admin completion queue entries, which is 0-based 65 66 #define NVME_CSQ_SIZE 1 // Number of I/O submission queue entries, which is 0-based 67 #define NVME_CCQ_SIZE 1 // Number of I/O completion queue entries, which is 0-based 68 69 // 70 // Number of asynchronous I/O submission queue entries, which is 0-based. 71 // The asynchronous I/O submission queue size is 4kB in total. 72 // 73 #define NVME_ASYNC_CSQ_SIZE 63 74 // 75 // Number of asynchronous I/O completion queue entries, which is 0-based. 76 // The asynchronous I/O completion queue size is 4kB in total. 77 // 78 #define NVME_ASYNC_CCQ_SIZE 255 79 80 #define NVME_MAX_QUEUES 3 // Number of queues supported by the driver 81 82 #define NVME_CONTROLLER_ID 0 83 84 // 85 // Time out value for Nvme transaction execution 86 // 87 #define NVME_GENERIC_TIMEOUT EFI_TIMER_PERIOD_SECONDS (5) 88 89 // 90 // Nvme async transfer timer interval, set by experience. 91 // 92 #define NVME_HC_ASYNC_TIMER EFI_TIMER_PERIOD_MILLISECONDS (1) 93 94 // 95 // Unique signature for private data structure. 96 // 97 #define NVME_CONTROLLER_PRIVATE_DATA_SIGNATURE SIGNATURE_32 ('N','V','M','E') 98 99 // 100 // Nvme private data structure. 101 // 102 struct _NVME_CONTROLLER_PRIVATE_DATA { 103 UINT32 Signature; 104 105 EFI_HANDLE ControllerHandle; 106 EFI_HANDLE ImageHandle; 107 EFI_HANDLE DriverBindingHandle; 108 109 EFI_PCI_IO_PROTOCOL *PciIo; 110 UINT64 PciAttributes; 111 112 EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath; 113 114 EFI_NVM_EXPRESS_PASS_THRU_MODE PassThruMode; 115 EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL Passthru; 116 117 // 118 // pointer to identify controller data 119 // 120 NVME_ADMIN_CONTROLLER_DATA *ControllerData; 121 122 // 123 // 6 x 4kB aligned buffers will be carved out of this buffer. 124 // 1st 4kB boundary is the start of the admin submission queue. 125 // 2nd 4kB boundary is the start of the admin completion queue. 126 // 3rd 4kB boundary is the start of I/O submission queue #1. 127 // 4th 4kB boundary is the start of I/O completion queue #1. 128 // 5th 4kB boundary is the start of I/O submission queue #2. 129 // 6th 4kB boundary is the start of I/O completion queue #2. 130 // 131 UINT8 *Buffer; 132 UINT8 *BufferPciAddr; 133 134 // 135 // Pointers to 4kB aligned submission & completion queues. 136 // 137 NVME_SQ *SqBuffer[NVME_MAX_QUEUES]; 138 NVME_CQ *CqBuffer[NVME_MAX_QUEUES]; 139 NVME_SQ *SqBufferPciAddr[NVME_MAX_QUEUES]; 140 NVME_CQ *CqBufferPciAddr[NVME_MAX_QUEUES]; 141 142 // 143 // Submission and completion queue indices. 144 // 145 NVME_SQTDBL SqTdbl[NVME_MAX_QUEUES]; 146 NVME_CQHDBL CqHdbl[NVME_MAX_QUEUES]; 147 UINT16 AsyncSqHead; 148 149 UINT8 Pt[NVME_MAX_QUEUES]; 150 UINT16 Cid[NVME_MAX_QUEUES]; 151 152 // 153 // Nvme controller capabilities 154 // 155 NVME_CAP Cap; 156 157 VOID *Mapping; 158 159 // 160 // For Non-blocking operations. 161 // 162 EFI_EVENT TimerEvent; 163 LIST_ENTRY AsyncPassThruQueue; 164 LIST_ENTRY UnsubmittedSubtasks; 165 }; 166 167 #define NVME_CONTROLLER_PRIVATE_DATA_FROM_PASS_THRU(a) \ 168 CR (a, \ 169 NVME_CONTROLLER_PRIVATE_DATA, \ 170 Passthru, \ 171 NVME_CONTROLLER_PRIVATE_DATA_SIGNATURE \ 172 ) 173 174 // 175 // Unique signature for private data structure. 176 // 177 #define NVME_DEVICE_PRIVATE_DATA_SIGNATURE SIGNATURE_32 ('X','S','S','D') 178 179 // 180 // Nvme device private data structure 181 // 182 struct _NVME_DEVICE_PRIVATE_DATA { 183 UINT32 Signature; 184 185 EFI_HANDLE DeviceHandle; 186 EFI_HANDLE ControllerHandle; 187 EFI_HANDLE DriverBindingHandle; 188 189 EFI_DEVICE_PATH_PROTOCOL *DevicePath; 190 191 EFI_UNICODE_STRING_TABLE *ControllerNameTable; 192 193 UINT32 NamespaceId; 194 UINT64 NamespaceUuid; 195 196 EFI_BLOCK_IO_MEDIA Media; 197 EFI_BLOCK_IO_PROTOCOL BlockIo; 198 EFI_BLOCK_IO2_PROTOCOL BlockIo2; 199 EFI_DISK_INFO_PROTOCOL DiskInfo; 200 EFI_STORAGE_SECURITY_COMMAND_PROTOCOL StorageSecurity; 201 202 LIST_ENTRY AsyncQueue; 203 204 EFI_LBA NumBlocks; 205 206 CHAR16 ModelName[80]; 207 NVME_ADMIN_NAMESPACE_DATA NamespaceData; 208 209 NVME_CONTROLLER_PRIVATE_DATA *Controller; 210 211 }; 212 213 // 214 // Statments to retrieve the private data from produced protocols. 215 // 216 #define NVME_DEVICE_PRIVATE_DATA_FROM_BLOCK_IO(a) \ 217 CR (a, \ 218 NVME_DEVICE_PRIVATE_DATA, \ 219 BlockIo, \ 220 NVME_DEVICE_PRIVATE_DATA_SIGNATURE \ 221 ) 222 223 #define NVME_DEVICE_PRIVATE_DATA_FROM_BLOCK_IO2(a) \ 224 CR (a, \ 225 NVME_DEVICE_PRIVATE_DATA, \ 226 BlockIo2, \ 227 NVME_DEVICE_PRIVATE_DATA_SIGNATURE \ 228 ) 229 230 #define NVME_DEVICE_PRIVATE_DATA_FROM_DISK_INFO(a) \ 231 CR (a, \ 232 NVME_DEVICE_PRIVATE_DATA, \ 233 DiskInfo, \ 234 NVME_DEVICE_PRIVATE_DATA_SIGNATURE \ 235 ) 236 237 #define NVME_DEVICE_PRIVATE_DATA_FROM_STORAGE_SECURITY(a)\ 238 CR (a, \ 239 NVME_DEVICE_PRIVATE_DATA, \ 240 StorageSecurity, \ 241 NVME_DEVICE_PRIVATE_DATA_SIGNATURE \ 242 ) 243 244 // 245 // Nvme block I/O 2 request. 246 // 247 #define NVME_BLKIO2_REQUEST_SIGNATURE SIGNATURE_32 ('N', 'B', '2', 'R') 248 249 typedef struct { 250 UINT32 Signature; 251 LIST_ENTRY Link; 252 253 EFI_BLOCK_IO2_TOKEN *Token; 254 UINTN UnsubmittedSubtaskNum; 255 BOOLEAN LastSubtaskSubmitted; 256 // 257 // The queue for Nvme read/write sub-tasks of a BlockIo2 request. 258 // 259 LIST_ENTRY SubtasksQueue; 260 } NVME_BLKIO2_REQUEST; 261 262 #define NVME_BLKIO2_REQUEST_FROM_LINK(a) \ 263 CR (a, NVME_BLKIO2_REQUEST, Link, NVME_BLKIO2_REQUEST_SIGNATURE) 264 265 #define NVME_BLKIO2_SUBTASK_SIGNATURE SIGNATURE_32 ('N', 'B', '2', 'S') 266 267 typedef struct { 268 UINT32 Signature; 269 LIST_ENTRY Link; 270 271 BOOLEAN IsLast; 272 UINT32 NamespaceId; 273 EFI_EVENT Event; 274 EFI_NVM_EXPRESS_PASS_THRU_COMMAND_PACKET *CommandPacket; 275 // 276 // The BlockIo2 request this subtask belongs to 277 // 278 NVME_BLKIO2_REQUEST *BlockIo2Request; 279 } NVME_BLKIO2_SUBTASK; 280 281 #define NVME_BLKIO2_SUBTASK_FROM_LINK(a) \ 282 CR (a, NVME_BLKIO2_SUBTASK, Link, NVME_BLKIO2_SUBTASK_SIGNATURE) 283 284 // 285 // Nvme asynchronous passthru request. 286 // 287 #define NVME_PASS_THRU_ASYNC_REQ_SIG SIGNATURE_32 ('N', 'P', 'A', 'R') 288 289 typedef struct { 290 UINT32 Signature; 291 LIST_ENTRY Link; 292 293 EFI_NVM_EXPRESS_PASS_THRU_COMMAND_PACKET *Packet; 294 UINT16 CommandId; 295 EFI_EVENT CallerEvent; 296 } NVME_PASS_THRU_ASYNC_REQ; 297 298 #define NVME_PASS_THRU_ASYNC_REQ_FROM_THIS(a) \ 299 CR (a, \ 300 NVME_PASS_THRU_ASYNC_REQ, \ 301 Link, \ 302 NVME_PASS_THRU_ASYNC_REQ_SIG \ 303 ) 304 305 /** 306 Retrieves a Unicode string that is the user readable name of the driver. 307 308 This function retrieves the user readable name of a driver in the form of a 309 Unicode string. If the driver specified by This has a user readable name in 310 the language specified by Language, then a pointer to the driver name is 311 returned in DriverName, and EFI_SUCCESS is returned. If the driver specified 312 by This does not support the language specified by Language, 313 then EFI_UNSUPPORTED is returned. 314 315 @param This[in] A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or 316 EFI_COMPONENT_NAME_PROTOCOL instance. 317 318 @param Language[in] A pointer to a Null-terminated ASCII string 319 array indicating the language. This is the 320 language of the driver name that the caller is 321 requesting, and it must match one of the 322 languages specified in SupportedLanguages. The 323 number of languages supported by a driver is up 324 to the driver writer. Language is specified 325 in RFC 4646 or ISO 639-2 language code format. 326 327 @param DriverName[out] A pointer to the Unicode string to return. 328 This Unicode string is the name of the 329 driver specified by This in the language 330 specified by Language. 331 332 @retval EFI_SUCCESS The Unicode string for the Driver specified by 333 This and the language specified by Language was 334 returned in DriverName. 335 336 @retval EFI_INVALID_PARAMETER Language is NULL. 337 338 @retval EFI_INVALID_PARAMETER DriverName is NULL. 339 340 @retval EFI_UNSUPPORTED The driver specified by This does not support 341 the language specified by Language. 342 343 **/ 344 EFI_STATUS 345 EFIAPI 346 NvmExpressComponentNameGetDriverName ( 347 IN EFI_COMPONENT_NAME_PROTOCOL *This, 348 IN CHAR8 *Language, 349 OUT CHAR16 **DriverName 350 ); 351 352 /** 353 Retrieves a Unicode string that is the user readable name of the controller 354 that is being managed by a driver. 355 356 This function retrieves the user readable name of the controller specified by 357 ControllerHandle and ChildHandle in the form of a Unicode string. If the 358 driver specified by This has a user readable name in the language specified by 359 Language, then a pointer to the controller name is returned in ControllerName, 360 and EFI_SUCCESS is returned. If the driver specified by This is not currently 361 managing the controller specified by ControllerHandle and ChildHandle, 362 then EFI_UNSUPPORTED is returned. If the driver specified by This does not 363 support the language specified by Language, then EFI_UNSUPPORTED is returned. 364 365 @param This[in] A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or 366 EFI_COMPONENT_NAME_PROTOCOL instance. 367 368 @param ControllerHandle[in] The handle of a controller that the driver 369 specified by This is managing. This handle 370 specifies the controller whose name is to be 371 returned. 372 373 @param ChildHandle[in] The handle of the child controller to retrieve 374 the name of. This is an optional parameter that 375 may be NULL. It will be NULL for device 376 drivers. It will also be NULL for a bus drivers 377 that wish to retrieve the name of the bus 378 controller. It will not be NULL for a bus 379 driver that wishes to retrieve the name of a 380 child controller. 381 382 @param Language[in] A pointer to a Null-terminated ASCII string 383 array indicating the language. This is the 384 language of the driver name that the caller is 385 requesting, and it must match one of the 386 languages specified in SupportedLanguages. The 387 number of languages supported by a driver is up 388 to the driver writer. Language is specified in 389 RFC 4646 or ISO 639-2 language code format. 390 391 @param ControllerName[out] A pointer to the Unicode string to return. 392 This Unicode string is the name of the 393 controller specified by ControllerHandle and 394 ChildHandle in the language specified by 395 Language from the point of view of the driver 396 specified by This. 397 398 @retval EFI_SUCCESS The Unicode string for the user readable name in 399 the language specified by Language for the 400 driver specified by This was returned in 401 DriverName. 402 403 @retval EFI_INVALID_PARAMETER ControllerHandle is NULL. 404 405 @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid 406 EFI_HANDLE. 407 408 @retval EFI_INVALID_PARAMETER Language is NULL. 409 410 @retval EFI_INVALID_PARAMETER ControllerName is NULL. 411 412 @retval EFI_UNSUPPORTED The driver specified by This is not currently 413 managing the controller specified by 414 ControllerHandle and ChildHandle. 415 416 @retval EFI_UNSUPPORTED The driver specified by This does not support 417 the language specified by Language. 418 419 **/ 420 EFI_STATUS 421 EFIAPI 422 NvmExpressComponentNameGetControllerName ( 423 IN EFI_COMPONENT_NAME_PROTOCOL *This, 424 IN EFI_HANDLE ControllerHandle, 425 IN EFI_HANDLE ChildHandle OPTIONAL, 426 IN CHAR8 *Language, 427 OUT CHAR16 **ControllerName 428 ); 429 430 /** 431 Tests to see if this driver supports a given controller. If a child device is provided, 432 it further tests to see if this driver supports creating a handle for the specified child device. 433 434 This function checks to see if the driver specified by This supports the device specified by 435 ControllerHandle. Drivers will typically use the device path attached to 436 ControllerHandle and/or the services from the bus I/O abstraction attached to 437 ControllerHandle to determine if the driver supports ControllerHandle. This function 438 may be called many times during platform initialization. In order to reduce boot times, the tests 439 performed by this function must be very small, and take as little time as possible to execute. This 440 function must not change the state of any hardware devices, and this function must be aware that the 441 device specified by ControllerHandle may already be managed by the same driver or a 442 different driver. This function must match its calls to AllocatePages() with FreePages(), 443 AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol(). 444 Since ControllerHandle may have been previously started by the same driver, if a protocol is 445 already in the opened state, then it must not be closed with CloseProtocol(). This is required 446 to guarantee the state of ControllerHandle is not modified by this function. 447 448 @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance. 449 @param[in] ControllerHandle The handle of the controller to test. This handle 450 must support a protocol interface that supplies 451 an I/O abstraction to the driver. 452 @param[in] RemainingDevicePath A pointer to the remaining portion of a device path. This 453 parameter is ignored by device drivers, and is optional for bus 454 drivers. For bus drivers, if this parameter is not NULL, then 455 the bus driver must determine if the bus controller specified 456 by ControllerHandle and the child controller specified 457 by RemainingDevicePath are both supported by this 458 bus driver. 459 460 @retval EFI_SUCCESS The device specified by ControllerHandle and 461 RemainingDevicePath is supported by the driver specified by This. 462 @retval EFI_ALREADY_STARTED The device specified by ControllerHandle and 463 RemainingDevicePath is already being managed by the driver 464 specified by This. 465 @retval EFI_ACCESS_DENIED The device specified by ControllerHandle and 466 RemainingDevicePath is already being managed by a different 467 driver or an application that requires exclusive access. 468 Currently not implemented. 469 @retval EFI_UNSUPPORTED The device specified by ControllerHandle and 470 RemainingDevicePath is not supported by the driver specified by This. 471 **/ 472 EFI_STATUS 473 EFIAPI 474 NvmExpressDriverBindingSupported ( 475 IN EFI_DRIVER_BINDING_PROTOCOL *This, 476 IN EFI_HANDLE Controller, 477 IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath 478 ); 479 480 /** 481 Starts a device controller or a bus controller. 482 483 The Start() function is designed to be invoked from the EFI boot service ConnectController(). 484 As a result, much of the error checking on the parameters to Start() has been moved into this 485 common boot service. It is legal to call Start() from other locations, 486 but the following calling restrictions must be followed or the system behavior will not be deterministic. 487 1. ControllerHandle must be a valid EFI_HANDLE. 488 2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally aligned 489 EFI_DEVICE_PATH_PROTOCOL. 490 3. Prior to calling Start(), the Supported() function for the driver specified by This must 491 have been called with the same calling parameters, and Supported() must have returned EFI_SUCCESS. 492 493 @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance. 494 @param[in] ControllerHandle The handle of the controller to start. This handle 495 must support a protocol interface that supplies 496 an I/O abstraction to the driver. 497 @param[in] RemainingDevicePath A pointer to the remaining portion of a device path. This 498 parameter is ignored by device drivers, and is optional for bus 499 drivers. For a bus driver, if this parameter is NULL, then handles 500 for all the children of Controller are created by this driver. 501 If this parameter is not NULL and the first Device Path Node is 502 not the End of Device Path Node, then only the handle for the 503 child device specified by the first Device Path Node of 504 RemainingDevicePath is created by this driver. 505 If the first Device Path Node of RemainingDevicePath is 506 the End of Device Path Node, no child handle is created by this 507 driver. 508 509 @retval EFI_SUCCESS The device was started. 510 @retval EFI_DEVICE_ERROR The device could not be started due to a device error.Currently not implemented. 511 @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources. 512 @retval Others The driver failded to start the device. 513 514 **/ 515 EFI_STATUS 516 EFIAPI 517 NvmExpressDriverBindingStart ( 518 IN EFI_DRIVER_BINDING_PROTOCOL *This, 519 IN EFI_HANDLE Controller, 520 IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath 521 ); 522 523 /** 524 Stops a device controller or a bus controller. 525 526 The Stop() function is designed to be invoked from the EFI boot service DisconnectController(). 527 As a result, much of the error checking on the parameters to Stop() has been moved 528 into this common boot service. It is legal to call Stop() from other locations, 529 but the following calling restrictions must be followed or the system behavior will not be deterministic. 530 1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous call to this 531 same driver's Start() function. 532 2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid 533 EFI_HANDLE. In addition, all of these handles must have been created in this driver's 534 Start() function, and the Start() function must have called OpenProtocol() on 535 ControllerHandle with an Attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER. 536 537 @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance. 538 @param[in] ControllerHandle A handle to the device being stopped. The handle must 539 support a bus specific I/O protocol for the driver 540 to use to stop the device. 541 @param[in] NumberOfChildren The number of child device handles in ChildHandleBuffer. 542 @param[in] ChildHandleBuffer An array of child handles to be freed. May be NULL 543 if NumberOfChildren is 0. 544 545 @retval EFI_SUCCESS The device was stopped. 546 @retval EFI_DEVICE_ERROR The device could not be stopped due to a device error. 547 548 **/ 549 EFI_STATUS 550 EFIAPI 551 NvmExpressDriverBindingStop ( 552 IN EFI_DRIVER_BINDING_PROTOCOL *This, 553 IN EFI_HANDLE Controller, 554 IN UINTN NumberOfChildren, 555 IN EFI_HANDLE *ChildHandleBuffer 556 ); 557 558 /** 559 Sends an NVM Express Command Packet to an NVM Express controller or namespace. This function supports 560 both blocking I/O and nonblocking I/O. The blocking I/O functionality is required, and the nonblocking 561 I/O functionality is optional. 562 563 @param[in] This A pointer to the EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL instance. 564 @param[in] NamespaceId Is a 32 bit Namespace ID to which the Express HCI command packet will be sent. 565 A value of 0 denotes the NVM Express controller, a value of all 0FFh in the namespace 566 ID specifies that the command packet should be sent to all valid namespaces. 567 @param[in,out] Packet A pointer to the NVM Express HCI Command Packet to send to the NVMe namespace specified 568 by NamespaceId. 569 @param[in] Event If nonblocking I/O is not supported then Event is ignored, and blocking I/O is performed. 570 If Event is NULL, then blocking I/O is performed. If Event is not NULL and non blocking I/O 571 is supported, then nonblocking I/O is performed, and Event will be signaled when the NVM 572 Express Command Packet completes. 573 574 @retval EFI_SUCCESS The NVM Express Command Packet was sent by the host. TransferLength bytes were transferred 575 to, or from DataBuffer. 576 @retval EFI_BAD_BUFFER_SIZE The NVM Express Command Packet was not executed. The number of bytes that could be transferred 577 is returned in TransferLength. 578 @retval EFI_NOT_READY The NVM Express Command Packet could not be sent because the controller is not ready. The caller 579 may retry again later. 580 @retval EFI_DEVICE_ERROR A device error occurred while attempting to send the NVM Express Command Packet. 581 @retval EFI_INVALID_PARAMETER Namespace, or the contents of EFI_NVM_EXPRESS_PASS_THRU_COMMAND_PACKET are invalid. The NVM 582 Express Command Packet was not sent, so no additional status information is available. 583 @retval EFI_UNSUPPORTED The command described by the NVM Express Command Packet is not supported by the host adapter. 584 The NVM Express Command Packet was not sent, so no additional status information is available. 585 @retval EFI_TIMEOUT A timeout occurred while waiting for the NVM Express Command Packet to execute. 586 587 **/ 588 EFI_STATUS 589 EFIAPI 590 NvmExpressPassThru ( 591 IN EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL *This, 592 IN UINT32 NamespaceId, 593 IN OUT EFI_NVM_EXPRESS_PASS_THRU_COMMAND_PACKET *Packet, 594 IN EFI_EVENT Event OPTIONAL 595 ); 596 597 /** 598 Used to retrieve the next namespace ID for this NVM Express controller. 599 600 The EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL.GetNextNamespace() function retrieves the next valid 601 namespace ID on this NVM Express controller. 602 603 If on input the value pointed to by NamespaceId is 0xFFFFFFFF, then the first valid namespace 604 ID defined on the NVM Express controller is returned in the location pointed to by NamespaceId 605 and a status of EFI_SUCCESS is returned. 606 607 If on input the value pointed to by NamespaceId is an invalid namespace ID other than 0xFFFFFFFF, 608 then EFI_INVALID_PARAMETER is returned. 609 610 If on input the value pointed to by NamespaceId is a valid namespace ID, then the next valid 611 namespace ID on the NVM Express controller is returned in the location pointed to by NamespaceId, 612 and EFI_SUCCESS is returned. 613 614 If the value pointed to by NamespaceId is the namespace ID of the last namespace on the NVM 615 Express controller, then EFI_NOT_FOUND is returned. 616 617 @param[in] This A pointer to the EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL instance. 618 @param[in,out] NamespaceId On input, a pointer to a legal NamespaceId for an NVM Express 619 namespace present on the NVM Express controller. On output, a 620 pointer to the next NamespaceId of an NVM Express namespace on 621 an NVM Express controller. An input value of 0xFFFFFFFF retrieves 622 the first NamespaceId for an NVM Express namespace present on an 623 NVM Express controller. 624 625 @retval EFI_SUCCESS The Namespace ID of the next Namespace was returned. 626 @retval EFI_NOT_FOUND There are no more namespaces defined on this controller. 627 @retval EFI_INVALID_PARAMETER NamespaceId is an invalid value other than 0xFFFFFFFF. 628 629 **/ 630 EFI_STATUS 631 EFIAPI 632 NvmExpressGetNextNamespace ( 633 IN EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL *This, 634 IN OUT UINT32 *NamespaceId 635 ); 636 637 /** 638 Used to translate a device path node to a namespace ID. 639 640 The EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL.GetNamespace() function determines the namespace ID associated with the 641 namespace described by DevicePath. 642 643 If DevicePath is a device path node type that the NVM Express Pass Thru driver supports, then the NVM Express 644 Pass Thru driver will attempt to translate the contents DevicePath into a namespace ID. 645 646 If this translation is successful, then that namespace ID is returned in NamespaceId, and EFI_SUCCESS is returned 647 648 @param[in] This A pointer to the EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL instance. 649 @param[in] DevicePath A pointer to the device path node that describes an NVM Express namespace on 650 the NVM Express controller. 651 @param[out] NamespaceId The NVM Express namespace ID contained in the device path node. 652 653 @retval EFI_SUCCESS DevicePath was successfully translated to NamespaceId. 654 @retval EFI_INVALID_PARAMETER If DevicePath or NamespaceId are NULL, then EFI_INVALID_PARAMETER is returned. 655 @retval EFI_UNSUPPORTED If DevicePath is not a device path node type that the NVM Express Pass Thru driver 656 supports, then EFI_UNSUPPORTED is returned. 657 @retval EFI_NOT_FOUND If DevicePath is a device path node type that the NVM Express Pass Thru driver 658 supports, but there is not a valid translation from DevicePath to a namespace ID, 659 then EFI_NOT_FOUND is returned. 660 **/ 661 EFI_STATUS 662 EFIAPI 663 NvmExpressGetNamespace ( 664 IN EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL *This, 665 IN EFI_DEVICE_PATH_PROTOCOL *DevicePath, 666 OUT UINT32 *NamespaceId 667 ); 668 669 /** 670 Used to allocate and build a device path node for an NVM Express namespace on an NVM Express controller. 671 672 The EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL.BuildDevicePath() function allocates and builds a single device 673 path node for the NVM Express namespace specified by NamespaceId. 674 675 If the NamespaceId is not valid, then EFI_NOT_FOUND is returned. 676 677 If DevicePath is NULL, then EFI_INVALID_PARAMETER is returned. 678 679 If there are not enough resources to allocate the device path node, then EFI_OUT_OF_RESOURCES is returned. 680 681 Otherwise, DevicePath is allocated with the boot service AllocatePool(), the contents of DevicePath are 682 initialized to describe the NVM Express namespace specified by NamespaceId, and EFI_SUCCESS is returned. 683 684 @param[in] This A pointer to the EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL instance. 685 @param[in] NamespaceId The NVM Express namespace ID for which a device path node is to be 686 allocated and built. Caller must set the NamespaceId to zero if the 687 device path node will contain a valid UUID. 688 @param[in,out] DevicePath A pointer to a single device path node that describes the NVM Express 689 namespace specified by NamespaceId. This function is responsible for 690 allocating the buffer DevicePath with the boot service AllocatePool(). 691 It is the caller's responsibility to free DevicePath when the caller 692 is finished with DevicePath. 693 @retval EFI_SUCCESS The device path node that describes the NVM Express namespace specified 694 by NamespaceId was allocated and returned in DevicePath. 695 @retval EFI_NOT_FOUND The NamespaceId is not valid. 696 @retval EFI_INVALID_PARAMETER DevicePath is NULL. 697 @retval EFI_OUT_OF_RESOURCES There are not enough resources to allocate the DevicePath node. 698 699 **/ 700 EFI_STATUS 701 EFIAPI 702 NvmExpressBuildDevicePath ( 703 IN EFI_NVM_EXPRESS_PASS_THRU_PROTOCOL *This, 704 IN UINT32 NamespaceId, 705 IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath 706 ); 707 708 /** 709 Dump the execution status from a given completion queue entry. 710 711 @param[in] Cq A pointer to the NVME_CQ item. 712 713 **/ 714 VOID 715 NvmeDumpStatus ( 716 IN NVME_CQ *Cq 717 ); 718 719 #endif 720