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1 | /** @file\r | |
2 | \r | |
3 | The internal header file includes the common header files, defines\r | |
4 | internal structure and functions used by Ftw module.\r | |
5 | \r | |
6 | Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r | |
7 | This program and the accompanying materials\r | |
8 | are licensed and made available under the terms and conditions of the BSD License\r | |
9 | which accompanies this distribution. The full text of the license may be found at\r | |
10 | http://opensource.org/licenses/bsd-license.php\r | |
11 | \r | |
12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
13 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
14 | \r | |
15 | **/\r | |
16 | \r | |
17 | #ifndef _EFI_FAULT_TOLERANT_WRITE_H_\r | |
18 | #define _EFI_FAULT_TOLERANT_WRITE_H_\r | |
19 | \r | |
20 | #include <PiDxe.h>\r | |
21 | \r | |
22 | #include <Guid/SystemNvDataGuid.h>\r | |
23 | #include <Guid/ZeroGuid.h>\r | |
24 | #include <Protocol/FaultTolerantWrite.h>\r | |
25 | #include <Protocol/FirmwareVolumeBlock.h>\r | |
26 | #include <Protocol/SwapAddressRange.h>\r | |
27 | \r | |
28 | #include <Library/PcdLib.h>\r | |
29 | #include <Library/DebugLib.h>\r | |
30 | #include <Library/UefiLib.h>\r | |
31 | #include <Library/UefiDriverEntryPoint.h>\r | |
32 | #include <Library/BaseMemoryLib.h>\r | |
33 | #include <Library/MemoryAllocationLib.h>\r | |
34 | #include <Library/ReportStatusCodeLib.h>\r | |
35 | \r | |
36 | //\r | |
37 | // Flash erase polarity is 1\r | |
38 | //\r | |
39 | #define FTW_ERASE_POLARITY 1\r | |
40 | \r | |
41 | #define FTW_ERASED_BYTE ((UINT8) (255))\r | |
42 | #define FTW_POLARITY_REVERT ((UINT8) (255))\r | |
43 | \r | |
44 | #define HEADER_ALLOCATED 0x1\r | |
45 | #define WRITES_ALLOCATED 0x2\r | |
46 | #define WRITES_COMPLETED 0x4\r | |
47 | \r | |
48 | #define BOOT_BLOCK_UPDATE 0x1\r | |
49 | #define SPARE_COMPLETED 0x2\r | |
50 | #define DEST_COMPLETED 0x4\r | |
51 | \r | |
52 | #define FTW_BLOCKS(Length, BlockSize) ((UINTN) ((Length) / (BlockSize) + (((Length) & ((BlockSize) - 1)) ? 1 : 0)))\r | |
53 | \r | |
54 | #define FTW_DEVICE_SIGNATURE SIGNATURE_32 ('F', 'T', 'W', 'D')\r | |
55 | \r | |
56 | //\r | |
57 | // EFI Fault tolerant protocol private data structure\r | |
58 | //\r | |
59 | typedef struct {\r | |
60 | UINTN Signature;\r | |
61 | EFI_HANDLE Handle;\r | |
62 | EFI_FAULT_TOLERANT_WRITE_PROTOCOL FtwInstance;\r | |
63 | EFI_PHYSICAL_ADDRESS WorkSpaceAddress; // Base address of working space range in flash.\r | |
64 | EFI_PHYSICAL_ADDRESS SpareAreaAddress; // Base address of spare range in flash.\r | |
65 | UINTN WorkSpaceLength; // Size of working space range in flash.\r | |
66 | UINTN NumberOfWorkSpaceBlock; // Number of the blocks in work block for work space.\r | |
67 | UINTN WorkBlockSize; // Block size in bytes of the work blocks in flash\r | |
68 | UINTN SpareAreaLength; // Size of spare range in flash.\r | |
69 | UINTN NumberOfSpareBlock; // Number of the blocks in spare block.\r | |
70 | UINTN SpareBlockSize; // Block size in bytes of the spare blocks in flash\r | |
71 | EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER *FtwWorkSpaceHeader;// Pointer to Working Space Header in memory buffer\r | |
72 | EFI_FAULT_TOLERANT_WRITE_HEADER *FtwLastWriteHeader;// Pointer to last record header in memory buffer\r | |
73 | EFI_FAULT_TOLERANT_WRITE_RECORD *FtwLastWriteRecord;// Pointer to last record in memory buffer\r | |
74 | EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *FtwFvBlock; // FVB of working block\r | |
75 | EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *FtwBackupFvb; // FVB of spare block\r | |
76 | EFI_LBA FtwSpareLba; // Start LBA of spare block\r | |
77 | EFI_LBA FtwWorkBlockLba; // Start LBA of working block that contains working space in its last block.\r | |
78 | UINTN NumberOfWorkBlock; // Number of the blocks in work block.\r | |
79 | EFI_LBA FtwWorkSpaceLba; // Start LBA of working space\r | |
80 | UINTN FtwWorkSpaceBase; // Offset into the FtwWorkSpaceLba block.\r | |
81 | UINTN FtwWorkSpaceSize; // Size of working space range that stores write record.\r | |
82 | EFI_LBA FtwWorkSpaceLbaInSpare; // Start LBA of working space in spare block.\r | |
83 | UINTN FtwWorkSpaceBaseInSpare;// Offset into the FtwWorkSpaceLbaInSpare block.\r | |
84 | UINT8 *FtwWorkSpace; // Point to Work Space in memory buffer\r | |
85 | //\r | |
86 | // Following a buffer of FtwWorkSpace[FTW_WORK_SPACE_SIZE],\r | |
87 | // Allocated with EFI_FTW_DEVICE.\r | |
88 | //\r | |
89 | } EFI_FTW_DEVICE;\r | |
90 | \r | |
91 | #define FTW_CONTEXT_FROM_THIS(a) CR (a, EFI_FTW_DEVICE, FtwInstance, FTW_DEVICE_SIGNATURE)\r | |
92 | \r | |
93 | //\r | |
94 | // Driver entry point\r | |
95 | //\r | |
96 | /**\r | |
97 | This function is the entry point of the Fault Tolerant Write driver.\r | |
98 | \r | |
99 | @param ImageHandle A handle for the image that is initializing this driver\r | |
100 | @param SystemTable A pointer to the EFI system table\r | |
101 | \r | |
102 | @return EFI_SUCCESS FTW has finished the initialization\r | |
103 | @retval EFI_NOT_FOUND Locate FVB protocol error\r | |
104 | @retval EFI_OUT_OF_RESOURCES Allocate memory error\r | |
105 | @retval EFI_VOLUME_CORRUPTED Firmware volume is error\r | |
106 | @retval EFI_ABORTED FTW initialization error\r | |
107 | \r | |
108 | **/\r | |
109 | EFI_STATUS\r | |
110 | EFIAPI\r | |
111 | InitializeFaultTolerantWrite (\r | |
112 | IN EFI_HANDLE ImageHandle,\r | |
113 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
114 | );\r | |
115 | \r | |
116 | //\r | |
117 | // Fault Tolerant Write Protocol API\r | |
118 | //\r | |
119 | \r | |
120 | /**\r | |
121 | Query the largest block that may be updated in a fault tolerant manner.\r | |
122 | \r | |
123 | \r | |
124 | @param This Indicates a pointer to the calling context.\r | |
125 | @param BlockSize A pointer to a caller allocated UINTN that is updated to\r | |
126 | indicate the size of the largest block that can be updated.\r | |
127 | \r | |
128 | @return EFI_SUCCESS The function completed successfully\r | |
129 | \r | |
130 | **/\r | |
131 | EFI_STATUS\r | |
132 | EFIAPI\r | |
133 | FtwGetMaxBlockSize (\r | |
134 | IN EFI_FAULT_TOLERANT_WRITE_PROTOCOL *This,\r | |
135 | OUT UINTN *BlockSize\r | |
136 | );\r | |
137 | \r | |
138 | /**\r | |
139 | Allocates space for the protocol to maintain information about writes.\r | |
140 | Since writes must be completed in a fault tolerant manner and multiple\r | |
141 | updates will require more resources to be successful, this function\r | |
142 | enables the protocol to ensure that enough space exists to track\r | |
143 | information about the upcoming writes.\r | |
144 | \r | |
145 | All writes must be completed or aborted before another fault tolerant write can occur.\r | |
146 | \r | |
147 | @param This Indicates a pointer to the calling context.\r | |
148 | @param CallerId The GUID identifying the write.\r | |
149 | @param PrivateDataSize The size of the caller's private data\r | |
150 | that must be recorded for each write.\r | |
151 | @param NumberOfWrites The number of fault tolerant block writes\r | |
152 | that will need to occur.\r | |
153 | \r | |
154 | @return EFI_SUCCESS The function completed successfully\r | |
155 | @retval EFI_ABORTED The function could not complete successfully.\r | |
156 | @retval EFI_ACCESS_DENIED All allocated writes have not been completed.\r | |
157 | \r | |
158 | **/\r | |
159 | EFI_STATUS\r | |
160 | EFIAPI\r | |
161 | FtwAllocate (\r | |
162 | IN EFI_FAULT_TOLERANT_WRITE_PROTOCOL *This,\r | |
163 | IN EFI_GUID *CallerId,\r | |
164 | IN UINTN PrivateDataSize,\r | |
165 | IN UINTN NumberOfWrites\r | |
166 | );\r | |
167 | \r | |
168 | /**\r | |
169 | Starts a target block update. This function will record data about write\r | |
170 | in fault tolerant storage and will complete the write in a recoverable\r | |
171 | manner, ensuring at all times that either the original contents or\r | |
172 | the modified contents are available.\r | |
173 | \r | |
174 | \r | |
175 | @param This Calling context\r | |
176 | @param Lba The logical block address of the target block.\r | |
177 | @param Offset The offset within the target block to place the data.\r | |
178 | @param Length The number of bytes to write to the target block.\r | |
179 | @param PrivateData A pointer to private data that the caller requires to\r | |
180 | complete any pending writes in the event of a fault.\r | |
181 | @param FvBlockHandle The handle of FVB protocol that provides services for\r | |
182 | reading, writing, and erasing the target block.\r | |
183 | @param Buffer The data to write.\r | |
184 | \r | |
185 | @retval EFI_SUCCESS The function completed successfully\r | |
186 | @retval EFI_ABORTED The function could not complete successfully.\r | |
187 | @retval EFI_BAD_BUFFER_SIZE The input data can't fit within the spare block.\r | |
188 | Offset + *NumBytes > SpareAreaLength.\r | |
189 | @retval EFI_ACCESS_DENIED No writes have been allocated.\r | |
190 | @retval EFI_OUT_OF_RESOURCES Cannot allocate enough memory resource.\r | |
191 | @retval EFI_NOT_FOUND Cannot find FVB protocol by handle.\r | |
192 | \r | |
193 | **/\r | |
194 | EFI_STATUS\r | |
195 | EFIAPI\r | |
196 | FtwWrite (\r | |
197 | IN EFI_FAULT_TOLERANT_WRITE_PROTOCOL *This,\r | |
198 | IN EFI_LBA Lba,\r | |
199 | IN UINTN Offset,\r | |
200 | IN UINTN Length,\r | |
201 | IN VOID *PrivateData,\r | |
202 | IN EFI_HANDLE FvBlockHandle,\r | |
203 | IN VOID *Buffer\r | |
204 | );\r | |
205 | \r | |
206 | /**\r | |
207 | Restarts a previously interrupted write. The caller must provide the\r | |
208 | block protocol needed to complete the interrupted write.\r | |
209 | \r | |
210 | @param This Calling context.\r | |
211 | @param FvBlockHandle The handle of FVB protocol that provides services for\r | |
212 | reading, writing, and erasing the target block.\r | |
213 | \r | |
214 | @retval EFI_SUCCESS The function completed successfully\r | |
215 | @retval EFI_ACCESS_DENIED No pending writes exist\r | |
216 | @retval EFI_NOT_FOUND FVB protocol not found by the handle\r | |
217 | @retval EFI_ABORTED The function could not complete successfully\r | |
218 | \r | |
219 | **/\r | |
220 | EFI_STATUS\r | |
221 | EFIAPI\r | |
222 | FtwRestart (\r | |
223 | IN EFI_FAULT_TOLERANT_WRITE_PROTOCOL *This,\r | |
224 | IN EFI_HANDLE FvBlockHandle\r | |
225 | );\r | |
226 | \r | |
227 | /**\r | |
228 | Aborts all previous allocated writes.\r | |
229 | \r | |
230 | @param This Calling context\r | |
231 | \r | |
232 | @retval EFI_SUCCESS The function completed successfully\r | |
233 | @retval EFI_ABORTED The function could not complete successfully.\r | |
234 | @retval EFI_NOT_FOUND No allocated writes exist.\r | |
235 | \r | |
236 | **/\r | |
237 | EFI_STATUS\r | |
238 | EFIAPI\r | |
239 | FtwAbort (\r | |
240 | IN EFI_FAULT_TOLERANT_WRITE_PROTOCOL *This\r | |
241 | );\r | |
242 | \r | |
243 | /**\r | |
244 | Starts a target block update. This records information about the write\r | |
245 | in fault tolerant storage and will complete the write in a recoverable\r | |
246 | manner, ensuring at all times that either the original contents or\r | |
247 | the modified contents are available.\r | |
248 | \r | |
249 | @param This Indicates a pointer to the calling context.\r | |
250 | @param CallerId The GUID identifying the last write.\r | |
251 | @param Lba The logical block address of the last write.\r | |
252 | @param Offset The offset within the block of the last write.\r | |
253 | @param Length The length of the last write.\r | |
254 | @param PrivateDataSize bytes from the private data\r | |
255 | stored for this write.\r | |
256 | @param PrivateData A pointer to a buffer. The function will copy\r | |
257 | @param Complete A Boolean value with TRUE indicating\r | |
258 | that the write was completed.\r | |
259 | \r | |
260 | @retval EFI_SUCCESS The function completed successfully\r | |
261 | @retval EFI_ABORTED The function could not complete successfully\r | |
262 | @retval EFI_NOT_FOUND No allocated writes exist\r | |
263 | @retval EFI_BUFFER_TOO_SMALL Input buffer is not larget enough\r | |
264 | \r | |
265 | **/\r | |
266 | EFI_STATUS\r | |
267 | EFIAPI\r | |
268 | FtwGetLastWrite (\r | |
269 | IN EFI_FAULT_TOLERANT_WRITE_PROTOCOL *This,\r | |
270 | OUT EFI_GUID *CallerId,\r | |
271 | OUT EFI_LBA *Lba,\r | |
272 | OUT UINTN *Offset,\r | |
273 | OUT UINTN *Length,\r | |
274 | IN OUT UINTN *PrivateDataSize,\r | |
275 | OUT VOID *PrivateData,\r | |
276 | OUT BOOLEAN *Complete\r | |
277 | );\r | |
278 | \r | |
279 | /**\r | |
280 | Erase spare block.\r | |
281 | \r | |
282 | @param FtwDevice The private data of FTW driver\r | |
283 | \r | |
284 | @retval EFI_SUCCESS The erase request was successfully completed.\r | |
285 | @retval EFI_ACCESS_DENIED The firmware volume is in the WriteDisabled state.\r | |
286 | @retval EFI_DEVICE_ERROR The block device is not functioning\r | |
287 | correctly and could not be written.\r | |
288 | The firmware device may have been\r | |
289 | partially erased.\r | |
290 | @retval EFI_INVALID_PARAMETER One or more of the LBAs listed\r | |
291 | in the variable argument list do\r | |
292 | not exist in the firmware volume.\r | |
293 | \r | |
294 | \r | |
295 | **/\r | |
296 | EFI_STATUS\r | |
297 | FtwEraseSpareBlock (\r | |
298 | IN EFI_FTW_DEVICE *FtwDevice\r | |
299 | );\r | |
300 | \r | |
301 | /**\r | |
302 | Retrieve the proper FVB protocol interface by HANDLE.\r | |
303 | \r | |
304 | \r | |
305 | @param FvBlockHandle The handle of FVB protocol that provides services for\r | |
306 | reading, writing, and erasing the target block.\r | |
307 | @param FvBlock The interface of FVB protocol\r | |
308 | \r | |
309 | @retval EFI_SUCCESS The function completed successfully\r | |
310 | @retval EFI_ABORTED The function could not complete successfully\r | |
311 | \r | |
312 | **/\r | |
313 | EFI_STATUS\r | |
314 | FtwGetFvbByHandle (\r | |
315 | IN EFI_HANDLE FvBlockHandle,\r | |
316 | OUT EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL **FvBlock\r | |
317 | );\r | |
318 | \r | |
319 | /**\r | |
320 | \r | |
321 | Is it in working block?\r | |
322 | \r | |
323 | @param FtwDevice The private data of FTW driver\r | |
324 | @param FvBlock Fvb protocol instance\r | |
325 | @param Lba The block specified\r | |
326 | \r | |
327 | @return A BOOLEAN value indicating in working block or not.\r | |
328 | \r | |
329 | **/\r | |
330 | BOOLEAN\r | |
331 | IsWorkingBlock (\r | |
332 | EFI_FTW_DEVICE *FtwDevice,\r | |
333 | EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *FvBlock,\r | |
334 | EFI_LBA Lba\r | |
335 | );\r | |
336 | \r | |
337 | /**\r | |
338 | \r | |
339 | Is it in boot block?\r | |
340 | \r | |
341 | @param FtwDevice The private data of FTW driver\r | |
342 | @param FvBlock Fvb protocol instance\r | |
343 | \r | |
344 | @return A BOOLEAN value indicating in boot block or not.\r | |
345 | \r | |
346 | **/\r | |
347 | BOOLEAN\r | |
348 | IsBootBlock (\r | |
349 | EFI_FTW_DEVICE *FtwDevice,\r | |
350 | EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *FvBlock\r | |
351 | );\r | |
352 | \r | |
353 | /**\r | |
354 | Copy the content of spare block to a target block. Size is FTW_BLOCK_SIZE.\r | |
355 | Spare block is accessed by FTW backup FVB protocol interface.\r | |
356 | Target block is accessed by FvBlock protocol interface.\r | |
357 | \r | |
358 | \r | |
359 | @param FtwDevice The private data of FTW driver\r | |
360 | @param FvBlock FVB Protocol interface to access target block\r | |
361 | @param Lba Lba of the target block\r | |
362 | @param BlockSize The size of the block\r | |
363 | @param NumberOfBlocks The number of consecutive blocks starting with Lba\r | |
364 | \r | |
365 | @retval EFI_SUCCESS Spare block content is copied to target block\r | |
366 | @retval EFI_INVALID_PARAMETER Input parameter error\r | |
367 | @retval EFI_OUT_OF_RESOURCES Allocate memory error\r | |
368 | @retval EFI_ABORTED The function could not complete successfully\r | |
369 | \r | |
370 | **/\r | |
371 | EFI_STATUS\r | |
372 | FlushSpareBlockToTargetBlock (\r | |
373 | EFI_FTW_DEVICE *FtwDevice,\r | |
374 | EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *FvBlock,\r | |
375 | EFI_LBA Lba,\r | |
376 | UINTN BlockSize,\r | |
377 | UINTN NumberOfBlocks\r | |
378 | );\r | |
379 | \r | |
380 | /**\r | |
381 | Copy the content of spare block to working block. Size is FTW_BLOCK_SIZE.\r | |
382 | Spare block is accessed by FTW backup FVB protocol interface. LBA is\r | |
383 | FtwDevice->FtwSpareLba.\r | |
384 | Working block is accessed by FTW working FVB protocol interface. LBA is\r | |
385 | FtwDevice->FtwWorkBlockLba.\r | |
386 | \r | |
387 | Since the working block header is important when FTW initializes, the\r | |
388 | state of the operation should be handled carefully. The Crc value is\r | |
389 | calculated without STATE element.\r | |
390 | \r | |
391 | @param FtwDevice The private data of FTW driver\r | |
392 | \r | |
393 | @retval EFI_SUCCESS Spare block content is copied to target block\r | |
394 | @retval EFI_OUT_OF_RESOURCES Allocate memory error\r | |
395 | @retval EFI_ABORTED The function could not complete successfully\r | |
396 | \r | |
397 | **/\r | |
398 | EFI_STATUS\r | |
399 | FlushSpareBlockToWorkingBlock (\r | |
400 | EFI_FTW_DEVICE *FtwDevice\r | |
401 | );\r | |
402 | \r | |
403 | /**\r | |
404 | Copy the content of spare block to a boot block. Size is FTW_BLOCK_SIZE.\r | |
405 | Spare block is accessed by FTW working FVB protocol interface.\r | |
406 | Target block is accessed by FvBlock protocol interface.\r | |
407 | \r | |
408 | FTW will do extra work on boot block update.\r | |
409 | FTW should depend on a protocol of EFI_ADDRESS_RANGE_SWAP_PROTOCOL,\r | |
410 | which is produced by a chipset driver.\r | |
411 | FTW updating boot block steps may be:\r | |
412 | 1. GetRangeLocation(), if the Range is inside the boot block, FTW know\r | |
413 | that boot block will be update. It shall add a FLAG in the working block.\r | |
414 | 2. When spare block is ready,\r | |
415 | 3. SetSwapState(SWAPPED)\r | |
416 | 4. erasing boot block,\r | |
417 | 5. programming boot block until the boot block is ok.\r | |
418 | 6. SetSwapState(UNSWAPPED)\r | |
419 | FTW shall not allow to update boot block when battery state is error.\r | |
420 | \r | |
421 | @param FtwDevice The private data of FTW driver\r | |
422 | \r | |
423 | @retval EFI_SUCCESS Spare block content is copied to boot block\r | |
424 | @retval EFI_INVALID_PARAMETER Input parameter error\r | |
425 | @retval EFI_OUT_OF_RESOURCES Allocate memory error\r | |
426 | @retval EFI_ABORTED The function could not complete successfully\r | |
427 | \r | |
428 | **/\r | |
429 | EFI_STATUS\r | |
430 | FlushSpareBlockToBootBlock (\r | |
431 | EFI_FTW_DEVICE *FtwDevice\r | |
432 | );\r | |
433 | \r | |
434 | /**\r | |
435 | Update a bit of state on a block device. The location of the bit is\r | |
436 | calculated by the (Lba, Offset, bit). Here bit is determined by the\r | |
437 | the name of a certain bit.\r | |
438 | \r | |
439 | \r | |
440 | @param FvBlock FVB Protocol interface to access SrcBlock and DestBlock\r | |
441 | @param BlockSize The size of the block\r | |
442 | @param Lba Lba of a block\r | |
443 | @param Offset Offset on the Lba\r | |
444 | @param NewBit New value that will override the old value if it can be change\r | |
445 | \r | |
446 | @retval EFI_SUCCESS A state bit has been updated successfully\r | |
447 | @retval Others Access block device error.\r | |
448 | Notes:\r | |
449 | Assume all bits of State are inside the same BYTE.\r | |
450 | @retval EFI_ABORTED Read block fail\r | |
451 | \r | |
452 | **/\r | |
453 | EFI_STATUS\r | |
454 | FtwUpdateFvState (\r | |
455 | IN EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *FvBlock,\r | |
456 | IN UINTN BlockSize,\r | |
457 | IN EFI_LBA Lba,\r | |
458 | IN UINTN Offset,\r | |
459 | IN UINT8 NewBit\r | |
460 | );\r | |
461 | \r | |
462 | /**\r | |
463 | Get the last Write Header pointer.\r | |
464 | The last write header is the header whose 'complete' state hasn't been set.\r | |
465 | After all, this header may be a EMPTY header entry for next Allocate.\r | |
466 | \r | |
467 | \r | |
468 | @param FtwWorkSpaceHeader Pointer of the working block header\r | |
469 | @param FtwWorkSpaceSize Size of the work space\r | |
470 | @param FtwWriteHeader Pointer to retrieve the last write header\r | |
471 | \r | |
472 | @retval EFI_SUCCESS Get the last write record successfully\r | |
473 | @retval EFI_ABORTED The FTW work space is damaged\r | |
474 | \r | |
475 | **/\r | |
476 | EFI_STATUS\r | |
477 | FtwGetLastWriteHeader (\r | |
478 | IN EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER *FtwWorkSpaceHeader,\r | |
479 | IN UINTN FtwWorkSpaceSize,\r | |
480 | OUT EFI_FAULT_TOLERANT_WRITE_HEADER **FtwWriteHeader\r | |
481 | );\r | |
482 | \r | |
483 | /**\r | |
484 | Get the last Write Record pointer. The last write Record is the Record\r | |
485 | whose DestinationCompleted state hasn't been set. After all, this Record\r | |
486 | may be a EMPTY record entry for next write.\r | |
487 | \r | |
488 | \r | |
489 | @param FtwWriteHeader Pointer to the write record header\r | |
490 | @param FtwWriteRecord Pointer to retrieve the last write record\r | |
491 | \r | |
492 | @retval EFI_SUCCESS Get the last write record successfully\r | |
493 | @retval EFI_ABORTED The FTW work space is damaged\r | |
494 | \r | |
495 | **/\r | |
496 | EFI_STATUS\r | |
497 | FtwGetLastWriteRecord (\r | |
498 | IN EFI_FAULT_TOLERANT_WRITE_HEADER *FtwWriteHeader,\r | |
499 | OUT EFI_FAULT_TOLERANT_WRITE_RECORD **FtwWriteRecord\r | |
500 | );\r | |
501 | \r | |
502 | /**\r | |
503 | To check if FtwRecord is the first record of FtwHeader.\r | |
504 | \r | |
505 | @param FtwHeader Pointer to the write record header\r | |
506 | @param FtwRecord Pointer to the write record\r | |
507 | \r | |
508 | @retval TRUE FtwRecord is the first Record of the FtwHeader\r | |
509 | @retval FALSE FtwRecord is not the first Record of the FtwHeader\r | |
510 | \r | |
511 | **/\r | |
512 | BOOLEAN\r | |
513 | IsFirstRecordOfWrites (\r | |
514 | IN EFI_FAULT_TOLERANT_WRITE_HEADER *FtwHeader,\r | |
515 | IN EFI_FAULT_TOLERANT_WRITE_RECORD *FtwRecord\r | |
516 | );\r | |
517 | \r | |
518 | /**\r | |
519 | To check if FtwRecord is the last record of FtwHeader. Because the\r | |
520 | FtwHeader has NumberOfWrites & PrivateDataSize, the FtwRecord can be\r | |
521 | determined if it is the last record of FtwHeader.\r | |
522 | \r | |
523 | @param FtwHeader Pointer to the write record header\r | |
524 | @param FtwRecord Pointer to the write record\r | |
525 | \r | |
526 | @retval TRUE FtwRecord is the last Record of the FtwHeader\r | |
527 | @retval FALSE FtwRecord is not the last Record of the FtwHeader\r | |
528 | \r | |
529 | **/\r | |
530 | BOOLEAN\r | |
531 | IsLastRecordOfWrites (\r | |
532 | IN EFI_FAULT_TOLERANT_WRITE_HEADER *FtwHeader,\r | |
533 | IN EFI_FAULT_TOLERANT_WRITE_RECORD *FtwRecord\r | |
534 | );\r | |
535 | \r | |
536 | /**\r | |
537 | To check if FtwRecord is the first record of FtwHeader.\r | |
538 | \r | |
539 | @param FtwHeader Pointer to the write record header\r | |
540 | @param FtwRecord Pointer to retrieve the previous write record\r | |
541 | \r | |
542 | @retval EFI_ACCESS_DENIED Input record is the first record, no previous record is return.\r | |
543 | @retval EFI_SUCCESS The previous write record is found.\r | |
544 | \r | |
545 | **/\r | |
546 | EFI_STATUS\r | |
547 | GetPreviousRecordOfWrites (\r | |
548 | IN EFI_FAULT_TOLERANT_WRITE_HEADER *FtwHeader,\r | |
549 | IN OUT EFI_FAULT_TOLERANT_WRITE_RECORD **FtwRecord\r | |
550 | );\r | |
551 | \r | |
552 | /**\r | |
553 | \r | |
554 | Check whether a flash buffer is erased.\r | |
555 | \r | |
556 | @param Buffer Buffer to check\r | |
557 | @param BufferSize Size of the buffer\r | |
558 | \r | |
559 | @return A BOOLEAN value indicating erased or not.\r | |
560 | \r | |
561 | **/\r | |
562 | BOOLEAN\r | |
563 | IsErasedFlashBuffer (\r | |
564 | IN UINT8 *Buffer,\r | |
565 | IN UINTN BufferSize\r | |
566 | );\r | |
567 | /**\r | |
568 | Initialize a work space when there is no work space.\r | |
569 | \r | |
570 | @param WorkingHeader Pointer of working block header\r | |
571 | \r | |
572 | @retval EFI_SUCCESS The function completed successfully\r | |
573 | @retval EFI_ABORTED The function could not complete successfully.\r | |
574 | \r | |
575 | **/\r | |
576 | EFI_STATUS\r | |
577 | InitWorkSpaceHeader (\r | |
578 | IN EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER *WorkingHeader\r | |
579 | );\r | |
580 | /**\r | |
581 | Read from working block to refresh the work space in memory.\r | |
582 | \r | |
583 | @param FtwDevice Point to private data of FTW driver\r | |
584 | \r | |
585 | @retval EFI_SUCCESS The function completed successfully\r | |
586 | @retval EFI_ABORTED The function could not complete successfully.\r | |
587 | \r | |
588 | **/\r | |
589 | EFI_STATUS\r | |
590 | WorkSpaceRefresh (\r | |
591 | IN EFI_FTW_DEVICE *FtwDevice\r | |
592 | );\r | |
593 | /**\r | |
594 | Check to see if it is a valid work space.\r | |
595 | \r | |
596 | \r | |
597 | @param WorkingHeader Pointer of working block header\r | |
598 | \r | |
599 | @retval EFI_SUCCESS The function completed successfully\r | |
600 | @retval EFI_ABORTED The function could not complete successfully.\r | |
601 | \r | |
602 | **/\r | |
603 | BOOLEAN\r | |
604 | IsValidWorkSpace (\r | |
605 | IN EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER *WorkingHeader\r | |
606 | );\r | |
607 | /**\r | |
608 | Reclaim the work space on the working block.\r | |
609 | \r | |
610 | @param FtwDevice Point to private data of FTW driver\r | |
611 | @param PreserveRecord Whether to preserve the working record is needed\r | |
612 | \r | |
613 | @retval EFI_SUCCESS The function completed successfully\r | |
614 | @retval EFI_OUT_OF_RESOURCES Allocate memory error\r | |
615 | @retval EFI_ABORTED The function could not complete successfully\r | |
616 | \r | |
617 | **/\r | |
618 | EFI_STATUS\r | |
619 | FtwReclaimWorkSpace (\r | |
620 | IN EFI_FTW_DEVICE *FtwDevice,\r | |
621 | IN BOOLEAN PreserveRecord\r | |
622 | );\r | |
623 | \r | |
624 | /**\r | |
625 | \r | |
626 | Get firmware volume block by address.\r | |
627 | \r | |
628 | \r | |
629 | @param Address Address specified the block\r | |
630 | @param FvBlock The block caller wanted\r | |
631 | \r | |
632 | @retval EFI_SUCCESS The protocol instance if found.\r | |
633 | @retval EFI_NOT_FOUND Block not found\r | |
634 | \r | |
635 | **/\r | |
636 | EFI_HANDLE\r | |
637 | GetFvbByAddress (\r | |
638 | IN EFI_PHYSICAL_ADDRESS Address,\r | |
639 | OUT EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL **FvBlock\r | |
640 | );\r | |
641 | \r | |
642 | /**\r | |
643 | Retrieve the proper Swap Address Range protocol interface.\r | |
644 | \r | |
645 | @param[out] SarProtocol The interface of SAR protocol\r | |
646 | \r | |
647 | @retval EFI_SUCCESS The SAR protocol instance was found and returned in SarProtocol.\r | |
648 | @retval EFI_NOT_FOUND The SAR protocol instance was not found.\r | |
649 | @retval EFI_INVALID_PARAMETER SarProtocol is NULL.\r | |
650 | \r | |
651 | **/\r | |
652 | EFI_STATUS\r | |
653 | FtwGetSarProtocol (\r | |
654 | OUT VOID **SarProtocol\r | |
655 | );\r | |
656 | \r | |
657 | /**\r | |
658 | Function returns an array of handles that support the FVB protocol\r | |
659 | in a buffer allocated from pool.\r | |
660 | \r | |
661 | @param[out] NumberHandles The number of handles returned in Buffer.\r | |
662 | @param[out] Buffer A pointer to the buffer to return the requested\r | |
663 | array of handles that support FVB protocol.\r | |
664 | \r | |
665 | @retval EFI_SUCCESS The array of handles was returned in Buffer, and the number of\r | |
666 | handles in Buffer was returned in NumberHandles.\r | |
667 | @retval EFI_NOT_FOUND No FVB handle was found.\r | |
668 | @retval EFI_OUT_OF_RESOURCES There is not enough pool memory to store the matching results.\r | |
669 | @retval EFI_INVALID_PARAMETER NumberHandles is NULL or Buffer is NULL.\r | |
670 | \r | |
671 | **/\r | |
672 | EFI_STATUS\r | |
673 | GetFvbCountAndBuffer (\r | |
674 | OUT UINTN *NumberHandles,\r | |
675 | OUT EFI_HANDLE **Buffer\r | |
676 | );\r | |
677 | \r | |
678 | \r | |
679 | /**\r | |
680 | Allocate private data for FTW driver and initialize it.\r | |
681 | \r | |
682 | @param[out] FtwData Pointer to the FTW device structure\r | |
683 | \r | |
684 | @retval EFI_SUCCESS Initialize the FTW device successfully.\r | |
685 | @retval EFI_OUT_OF_RESOURCES Allocate memory error\r | |
686 | @retval EFI_INVALID_PARAMETER Workspace or Spare block does not exist\r | |
687 | \r | |
688 | **/\r | |
689 | EFI_STATUS\r | |
690 | InitFtwDevice (\r | |
691 | OUT EFI_FTW_DEVICE **FtwData\r | |
692 | );\r | |
693 | \r | |
694 | \r | |
695 | /**\r | |
696 | Initialization for Fault Tolerant Write is done in this handler.\r | |
697 | \r | |
698 | @param[in, out] FtwDevice Pointer to the FTW device structure\r | |
699 | \r | |
700 | @retval EFI_SUCCESS Initialize the FTW protocol successfully.\r | |
701 | @retval EFI_NOT_FOUND No proper FVB protocol was found.\r | |
702 | \r | |
703 | **/\r | |
704 | EFI_STATUS\r | |
705 | InitFtwProtocol (\r | |
706 | IN OUT EFI_FTW_DEVICE *FtwDevice\r | |
707 | );\r | |
708 | \r | |
709 | /**\r | |
710 | Initialize a local work space header.\r | |
711 | \r | |
712 | Since Signature and WriteQueueSize have been known, Crc can be calculated out,\r | |
713 | then the work space header will be fixed.\r | |
714 | **/\r | |
715 | VOID\r | |
716 | InitializeLocalWorkSpaceHeader (\r | |
717 | VOID\r | |
718 | );\r | |
719 | \r | |
720 | /**\r | |
721 | Read work space data from work block or spare block.\r | |
722 | \r | |
723 | @param FvBlock FVB Protocol interface to access the block.\r | |
724 | @param BlockSize The size of the block.\r | |
725 | @param Lba Lba of the block.\r | |
726 | @param Offset The offset within the block.\r | |
727 | @param Length The number of bytes to read from the block.\r | |
728 | @param Buffer The data is read.\r | |
729 | \r | |
730 | @retval EFI_SUCCESS The function completed successfully.\r | |
731 | @retval EFI_ABORTED The function could not complete successfully.\r | |
732 | \r | |
733 | **/\r | |
734 | EFI_STATUS\r | |
735 | ReadWorkSpaceData (\r | |
736 | IN EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *FvBlock,\r | |
737 | IN UINTN BlockSize,\r | |
738 | IN EFI_LBA Lba,\r | |
739 | IN UINTN Offset,\r | |
740 | IN UINTN Length,\r | |
741 | OUT UINT8 *Buffer\r | |
742 | );\r | |
743 | \r | |
744 | /**\r | |
745 | Write data to work block.\r | |
746 | \r | |
747 | @param FvBlock FVB Protocol interface to access the block.\r | |
748 | @param BlockSize The size of the block.\r | |
749 | @param Lba Lba of the block.\r | |
750 | @param Offset The offset within the block to place the data.\r | |
751 | @param Length The number of bytes to write to the block.\r | |
752 | @param Buffer The data to write.\r | |
753 | \r | |
754 | @retval EFI_SUCCESS The function completed successfully.\r | |
755 | @retval EFI_ABORTED The function could not complete successfully.\r | |
756 | \r | |
757 | **/\r | |
758 | EFI_STATUS\r | |
759 | WriteWorkSpaceData (\r | |
760 | IN EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *FvBlock,\r | |
761 | IN UINTN BlockSize,\r | |
762 | IN EFI_LBA Lba,\r | |
763 | IN UINTN Offset,\r | |
764 | IN UINTN Length,\r | |
765 | IN UINT8 *Buffer\r | |
766 | );\r | |
767 | \r | |
768 | /**\r | |
769 | Internal implementation of CRC32. Depending on the execution context\r | |
770 | (traditional SMM or DXE vs standalone MM), this function is implemented\r | |
771 | via a call to the CalculateCrc32 () boot service, or via a library\r | |
772 | call.\r | |
773 | \r | |
774 | If Buffer is NULL, then ASSERT().\r | |
775 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r | |
776 | \r | |
777 | @param[in] Buffer A pointer to the buffer on which the 32-bit CRC is\r | |
778 | to be computed.\r | |
779 | @param[in] Length The number of bytes in the buffer Data.\r | |
780 | \r | |
781 | @retval Crc32 The 32-bit CRC was computed for the data buffer.\r | |
782 | \r | |
783 | **/\r | |
784 | UINT32\r | |
785 | FtwCalculateCrc32 (\r | |
786 | IN VOID *Buffer,\r | |
787 | IN UINTN Length\r | |
788 | );\r | |
789 | \r | |
790 | #endif\r |