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85e923a5 LG |
1 | /** @file\r |
2 | \r | |
3 | Internal functions to operate Working Block Space.\r | |
4 | \r | |
8dc8879a | 5 | Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>\r |
e5eed7d3 | 6 | This program and the accompanying materials \r |
85e923a5 LG |
7 | are licensed and made available under the terms and conditions of the BSD License \r |
8 | which accompanies this distribution. The full text of the license may be found at \r | |
9 | http://opensource.org/licenses/bsd-license.php \r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
13 | \r | |
14 | **/\r | |
15 | \r | |
16 | \r | |
17 | #include "FaultTolerantWrite.h"\r | |
18 | \r | |
19 | /**\r | |
20 | Check to see if it is a valid work space.\r | |
21 | \r | |
22 | \r | |
23 | @param WorkingHeader Pointer of working block header\r | |
24 | \r | |
25 | @retval EFI_SUCCESS The function completed successfully\r | |
26 | @retval EFI_ABORTED The function could not complete successfully.\r | |
27 | \r | |
28 | **/\r | |
29 | BOOLEAN\r | |
30 | IsValidWorkSpace (\r | |
31 | IN EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER *WorkingHeader\r | |
32 | )\r | |
33 | {\r | |
34 | EFI_STATUS Status;\r | |
35 | EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER WorkingBlockHeader;\r | |
36 | \r | |
37 | if (WorkingHeader == NULL) {\r | |
38 | return FALSE;\r | |
39 | }\r | |
40 | \r | |
41 | if (WorkingHeader->WorkingBlockValid != FTW_VALID_STATE) {\r | |
42 | DEBUG ((EFI_D_ERROR, "Ftw: Work block header valid bit check error\n"));\r | |
43 | return FALSE;\r | |
44 | }\r | |
45 | //\r | |
46 | // Check signature with gEfiSystemNvDataFvGuid\r | |
47 | //\r | |
48 | if (!CompareGuid (&gEfiSystemNvDataFvGuid, &WorkingHeader->Signature)) {\r | |
49 | DEBUG ((EFI_D_ERROR, "Ftw: Work block header signature check error\n"));\r | |
50 | return FALSE;\r | |
51 | }\r | |
52 | //\r | |
53 | // Check the CRC of header\r | |
54 | //\r | |
55 | CopyMem (\r | |
56 | &WorkingBlockHeader,\r | |
57 | WorkingHeader,\r | |
58 | sizeof (EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER)\r | |
59 | );\r | |
60 | \r | |
61 | //\r | |
62 | // Filter out the Crc and State fields\r | |
63 | //\r | |
64 | SetMem (\r | |
65 | &WorkingBlockHeader.Crc,\r | |
66 | sizeof (UINT32),\r | |
67 | FTW_ERASED_BYTE\r | |
68 | );\r | |
69 | WorkingBlockHeader.WorkingBlockValid = FTW_ERASE_POLARITY;\r | |
70 | WorkingBlockHeader.WorkingBlockInvalid = FTW_ERASE_POLARITY;\r | |
71 | \r | |
72 | //\r | |
73 | // Calculate the Crc of woking block header\r | |
74 | //\r | |
75 | Status = gBS->CalculateCrc32 (\r | |
76 | (UINT8 *) &WorkingBlockHeader,\r | |
77 | sizeof (EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER),\r | |
78 | &WorkingBlockHeader.Crc\r | |
79 | );\r | |
80 | if (EFI_ERROR (Status)) {\r | |
81 | return FALSE;\r | |
82 | }\r | |
83 | \r | |
84 | if (WorkingBlockHeader.Crc != WorkingHeader->Crc) {\r | |
85 | DEBUG ((EFI_D_ERROR, "Ftw: Work block header CRC check error\n"));\r | |
86 | return FALSE;\r | |
87 | }\r | |
88 | \r | |
89 | return TRUE;\r | |
90 | }\r | |
91 | \r | |
92 | /**\r | |
93 | Initialize a work space when there is no work space.\r | |
94 | \r | |
95 | @param WorkingHeader Pointer of working block header\r | |
96 | \r | |
97 | @retval EFI_SUCCESS The function completed successfully\r | |
98 | @retval EFI_ABORTED The function could not complete successfully.\r | |
99 | \r | |
100 | **/\r | |
101 | EFI_STATUS\r | |
102 | InitWorkSpaceHeader (\r | |
103 | IN EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER *WorkingHeader\r | |
104 | )\r | |
105 | {\r | |
106 | EFI_STATUS Status;\r | |
107 | \r | |
108 | if (WorkingHeader == NULL) {\r | |
109 | return EFI_INVALID_PARAMETER;\r | |
110 | }\r | |
111 | //\r | |
112 | // Here using gEfiSystemNvDataFvGuid as the signature.\r | |
113 | //\r | |
114 | CopyMem (\r | |
115 | &WorkingHeader->Signature,\r | |
116 | &gEfiSystemNvDataFvGuid,\r | |
117 | sizeof (EFI_GUID)\r | |
118 | );\r | |
119 | WorkingHeader->WriteQueueSize = (UINT64) (PcdGet32 (PcdFlashNvStorageFtwWorkingSize) - sizeof (EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER));\r | |
120 | \r | |
121 | //\r | |
122 | // Crc is calculated with all the fields except Crc and STATE\r | |
123 | //\r | |
124 | WorkingHeader->WorkingBlockValid = FTW_ERASE_POLARITY;\r | |
125 | WorkingHeader->WorkingBlockInvalid = FTW_ERASE_POLARITY;\r | |
126 | \r | |
127 | SetMem (\r | |
128 | &WorkingHeader->Crc,\r | |
129 | sizeof (UINT32),\r | |
130 | FTW_ERASED_BYTE\r | |
131 | );\r | |
132 | \r | |
133 | //\r | |
134 | // Calculate the CRC value\r | |
135 | //\r | |
136 | Status = gBS->CalculateCrc32 (\r | |
137 | (UINT8 *) WorkingHeader,\r | |
138 | sizeof (EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER),\r | |
139 | &WorkingHeader->Crc\r | |
140 | );\r | |
141 | if (EFI_ERROR (Status)) {\r | |
142 | return EFI_ABORTED;\r | |
143 | }\r | |
144 | //\r | |
145 | // Restore the WorkingBlockValid flag to VALID state\r | |
146 | //\r | |
147 | WorkingHeader->WorkingBlockValid = FTW_VALID_STATE;\r | |
148 | WorkingHeader->WorkingBlockInvalid = FTW_INVALID_STATE;\r | |
149 | \r | |
150 | return EFI_SUCCESS;\r | |
151 | }\r | |
152 | \r | |
153 | /**\r | |
154 | Read from working block to refresh the work space in memory.\r | |
155 | \r | |
156 | @param FtwDevice Point to private data of FTW driver\r | |
157 | \r | |
158 | @retval EFI_SUCCESS The function completed successfully\r | |
159 | @retval EFI_ABORTED The function could not complete successfully.\r | |
160 | \r | |
161 | **/\r | |
162 | EFI_STATUS\r | |
163 | WorkSpaceRefresh (\r | |
164 | IN EFI_FTW_DEVICE *FtwDevice\r | |
165 | )\r | |
166 | {\r | |
167 | EFI_STATUS Status;\r | |
168 | UINTN Length;\r | |
169 | UINTN Offset;\r | |
170 | EFI_FAULT_TOLERANT_WRITE_HEADER *FtwHeader;\r | |
171 | \r | |
172 | //\r | |
173 | // Initialize WorkSpace as FTW_ERASED_BYTE\r | |
174 | //\r | |
175 | SetMem (\r | |
176 | FtwDevice->FtwWorkSpace,\r | |
177 | FtwDevice->FtwWorkSpaceSize,\r | |
178 | FTW_ERASED_BYTE\r | |
179 | );\r | |
180 | \r | |
181 | //\r | |
182 | // Read from working block\r | |
183 | //\r | |
184 | Length = FtwDevice->FtwWorkSpaceSize;\r | |
185 | Status = FtwDevice->FtwFvBlock->Read (\r | |
186 | FtwDevice->FtwFvBlock,\r | |
187 | FtwDevice->FtwWorkSpaceLba,\r | |
188 | FtwDevice->FtwWorkSpaceBase,\r | |
189 | &Length,\r | |
190 | FtwDevice->FtwWorkSpace\r | |
191 | );\r | |
192 | if (EFI_ERROR (Status)) {\r | |
193 | return EFI_ABORTED;\r | |
194 | }\r | |
195 | //\r | |
196 | // Refresh the FtwLastWriteHeader\r | |
197 | //\r | |
198 | Status = FtwGetLastWriteHeader (\r | |
199 | FtwDevice->FtwWorkSpaceHeader,\r | |
200 | FtwDevice->FtwWorkSpaceSize,\r | |
201 | &FtwDevice->FtwLastWriteHeader\r | |
202 | );\r | |
203 | \r | |
204 | FtwHeader = FtwDevice->FtwLastWriteHeader;\r | |
205 | Offset = (UINTN) (UINT8 *) FtwHeader - (UINTN) FtwDevice->FtwWorkSpace;\r | |
206 | \r | |
207 | //\r | |
208 | // if the Header is out of the workspace limit, call reclaim.\r | |
209 | //\r | |
210 | if (EFI_ERROR (Status) && (Offset >= FtwDevice->FtwWorkSpaceSize)) {\r | |
211 | //\r | |
212 | // reclaim work space in working block.\r | |
213 | //\r | |
214 | Status = FtwReclaimWorkSpace (FtwDevice, TRUE);\r | |
215 | if (EFI_ERROR (Status)) {\r | |
216 | DEBUG ((EFI_D_ERROR, "Ftw: Reclaim workspace - %r\n", Status));\r | |
217 | return EFI_ABORTED;\r | |
218 | }\r | |
219 | //\r | |
220 | // Read from working block again\r | |
221 | //\r | |
222 | Length = FtwDevice->FtwWorkSpaceSize;\r | |
223 | Status = FtwDevice->FtwFvBlock->Read (\r | |
224 | FtwDevice->FtwFvBlock,\r | |
225 | FtwDevice->FtwWorkSpaceLba,\r | |
226 | FtwDevice->FtwWorkSpaceBase,\r | |
227 | &Length,\r | |
228 | FtwDevice->FtwWorkSpace\r | |
229 | );\r | |
230 | if (EFI_ERROR (Status)) {\r | |
231 | return EFI_ABORTED;\r | |
232 | }\r | |
233 | \r | |
234 | Status = FtwGetLastWriteHeader (\r | |
235 | FtwDevice->FtwWorkSpaceHeader,\r | |
236 | FtwDevice->FtwWorkSpaceSize,\r | |
237 | &FtwDevice->FtwLastWriteHeader\r | |
238 | );\r | |
239 | }\r | |
240 | //\r | |
241 | // Refresh the FtwLastWriteRecord\r | |
242 | //\r | |
243 | Status = FtwGetLastWriteRecord (\r | |
244 | FtwDevice->FtwLastWriteHeader,\r | |
245 | &FtwDevice->FtwLastWriteRecord\r | |
246 | );\r | |
247 | if (EFI_ERROR (Status)) {\r | |
248 | return EFI_ABORTED;\r | |
249 | }\r | |
250 | \r | |
251 | return EFI_SUCCESS;\r | |
252 | }\r | |
253 | \r | |
254 | /**\r | |
255 | Reclaim the work space on the working block.\r | |
256 | \r | |
257 | @param FtwDevice Point to private data of FTW driver\r | |
258 | @param PreserveRecord Whether to preserve the working record is needed\r | |
259 | \r | |
260 | @retval EFI_SUCCESS The function completed successfully\r | |
261 | @retval EFI_OUT_OF_RESOURCES Allocate memory error\r | |
262 | @retval EFI_ABORTED The function could not complete successfully\r | |
263 | \r | |
264 | **/\r | |
265 | EFI_STATUS\r | |
266 | FtwReclaimWorkSpace (\r | |
267 | IN EFI_FTW_DEVICE *FtwDevice,\r | |
268 | IN BOOLEAN PreserveRecord\r | |
269 | )\r | |
270 | {\r | |
271 | EFI_STATUS Status;\r | |
272 | UINTN Length;\r | |
273 | EFI_FAULT_TOLERANT_WRITE_HEADER *Header;\r | |
274 | UINT8 *TempBuffer;\r | |
275 | UINTN TempBufferSize;\r | |
276 | UINTN SpareBufferSize;\r | |
277 | UINT8 *SpareBuffer;\r | |
278 | EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER *WorkingBlockHeader;\r | |
279 | UINTN Index;\r | |
280 | UINT8 *Ptr;\r | |
281 | \r | |
282 | DEBUG ((EFI_D_ERROR, "Ftw: start to reclaim work space\n"));\r | |
283 | \r | |
284 | //\r | |
285 | // Read all original data from working block to a memory buffer\r | |
286 | //\r | |
287 | TempBufferSize = FtwDevice->SpareAreaLength;\r | |
288 | TempBuffer = AllocateZeroPool (TempBufferSize);\r | |
289 | if (TempBuffer == NULL) {\r | |
290 | return EFI_OUT_OF_RESOURCES;\r | |
291 | }\r | |
292 | \r | |
293 | Ptr = TempBuffer;\r | |
294 | for (Index = 0; Index < FtwDevice->NumberOfSpareBlock; Index += 1) {\r | |
295 | Length = FtwDevice->BlockSize;\r | |
296 | Status = FtwDevice->FtwFvBlock->Read (\r | |
297 | FtwDevice->FtwFvBlock,\r | |
298 | FtwDevice->FtwWorkBlockLba + Index,\r | |
299 | 0,\r | |
300 | &Length,\r | |
301 | Ptr\r | |
302 | );\r | |
303 | if (EFI_ERROR (Status)) {\r | |
304 | FreePool (TempBuffer);\r | |
305 | return EFI_ABORTED;\r | |
306 | }\r | |
307 | \r | |
308 | Ptr += Length;\r | |
309 | }\r | |
310 | //\r | |
311 | // Clean up the workspace, remove all the completed records.\r | |
312 | //\r | |
313 | Ptr = TempBuffer +\r | |
314 | ((UINTN) (FtwDevice->FtwWorkSpaceLba - FtwDevice->FtwWorkBlockLba)) * FtwDevice->BlockSize + \r | |
315 | FtwDevice->FtwWorkSpaceBase;\r | |
316 | \r | |
317 | //\r | |
318 | // Clear the content of buffer that will save the new work space data\r | |
319 | //\r | |
320 | SetMem (Ptr, FtwDevice->FtwWorkSpaceSize, FTW_ERASED_BYTE);\r | |
321 | \r | |
322 | //\r | |
323 | // Copy EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER to buffer\r | |
324 | //\r | |
325 | CopyMem (\r | |
326 | Ptr,\r | |
327 | FtwDevice->FtwWorkSpaceHeader,\r | |
328 | sizeof (EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER)\r | |
329 | );\r | |
330 | if (PreserveRecord) {\r | |
331 | //\r | |
332 | // Get the last record following the header,\r | |
333 | //\r | |
334 | Status = FtwGetLastWriteHeader (\r | |
335 | FtwDevice->FtwWorkSpaceHeader,\r | |
336 | FtwDevice->FtwWorkSpaceSize,\r | |
337 | &FtwDevice->FtwLastWriteHeader\r | |
338 | );\r | |
339 | Header = FtwDevice->FtwLastWriteHeader;\r | |
8dc8879a | 340 | if (!EFI_ERROR (Status) && (Header != NULL) && (Header->Complete != FTW_VALID_STATE) && (Header->HeaderAllocated == FTW_VALID_STATE)) {\r |
85e923a5 LG |
341 | CopyMem (\r |
342 | Ptr + sizeof (EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER),\r | |
343 | FtwDevice->FtwLastWriteHeader,\r | |
344 | WRITE_TOTAL_SIZE (Header->NumberOfWrites, Header->PrivateDataSize)\r | |
345 | );\r | |
346 | }\r | |
347 | }\r | |
348 | \r | |
349 | CopyMem (\r | |
350 | FtwDevice->FtwWorkSpace,\r | |
351 | Ptr,\r | |
352 | FtwDevice->FtwWorkSpaceSize\r | |
353 | );\r | |
354 | \r | |
355 | FtwGetLastWriteHeader (\r | |
356 | FtwDevice->FtwWorkSpaceHeader,\r | |
357 | FtwDevice->FtwWorkSpaceSize,\r | |
358 | &FtwDevice->FtwLastWriteHeader\r | |
359 | );\r | |
360 | \r | |
361 | //\r | |
362 | // Set the WorkingBlockValid and WorkingBlockInvalid as INVALID\r | |
363 | //\r | |
364 | WorkingBlockHeader = (EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER *) (TempBuffer + FtwDevice->FtwWorkSpaceBase);\r | |
365 | WorkingBlockHeader->WorkingBlockValid = FTW_INVALID_STATE;\r | |
366 | WorkingBlockHeader->WorkingBlockInvalid = FTW_INVALID_STATE;\r | |
367 | \r | |
368 | //\r | |
369 | // Try to keep the content of spare block\r | |
370 | // Save spare block into a spare backup memory buffer (Sparebuffer)\r | |
371 | //\r | |
372 | SpareBufferSize = FtwDevice->SpareAreaLength;\r | |
373 | SpareBuffer = AllocatePool (SpareBufferSize);\r | |
374 | if (SpareBuffer == NULL) {\r | |
375 | FreePool (TempBuffer);\r | |
376 | return EFI_OUT_OF_RESOURCES;\r | |
377 | }\r | |
378 | \r | |
379 | Ptr = SpareBuffer;\r | |
380 | for (Index = 0; Index < FtwDevice->NumberOfSpareBlock; Index += 1) {\r | |
381 | Length = FtwDevice->BlockSize;\r | |
382 | Status = FtwDevice->FtwBackupFvb->Read (\r | |
383 | FtwDevice->FtwBackupFvb,\r | |
384 | FtwDevice->FtwSpareLba + Index,\r | |
385 | 0,\r | |
386 | &Length,\r | |
387 | Ptr\r | |
388 | );\r | |
389 | if (EFI_ERROR (Status)) {\r | |
390 | FreePool (TempBuffer);\r | |
391 | FreePool (SpareBuffer);\r | |
392 | return EFI_ABORTED;\r | |
393 | }\r | |
394 | \r | |
395 | Ptr += Length;\r | |
396 | }\r | |
397 | //\r | |
398 | // Write the memory buffer to spare block\r | |
399 | //\r | |
400 | Status = FtwEraseSpareBlock (FtwDevice);\r | |
401 | Ptr = TempBuffer;\r | |
402 | for (Index = 0; Index < FtwDevice->NumberOfSpareBlock; Index += 1) {\r | |
403 | Length = FtwDevice->BlockSize;\r | |
404 | Status = FtwDevice->FtwBackupFvb->Write (\r | |
405 | FtwDevice->FtwBackupFvb,\r | |
406 | FtwDevice->FtwSpareLba + Index,\r | |
407 | 0,\r | |
408 | &Length,\r | |
409 | Ptr\r | |
410 | );\r | |
411 | if (EFI_ERROR (Status)) {\r | |
412 | FreePool (TempBuffer);\r | |
413 | FreePool (SpareBuffer);\r | |
414 | return EFI_ABORTED;\r | |
415 | }\r | |
416 | \r | |
417 | Ptr += Length;\r | |
418 | }\r | |
419 | //\r | |
420 | // Free TempBuffer\r | |
421 | //\r | |
422 | FreePool (TempBuffer);\r | |
423 | \r | |
424 | //\r | |
425 | // Set the WorkingBlockValid in spare block\r | |
426 | //\r | |
427 | Status = FtwUpdateFvState (\r | |
428 | FtwDevice->FtwBackupFvb,\r | |
429 | FtwDevice->FtwWorkSpaceLba,\r | |
430 | FtwDevice->FtwWorkSpaceBase + sizeof (EFI_GUID) + sizeof (UINT32),\r | |
431 | WORKING_BLOCK_VALID\r | |
432 | );\r | |
433 | if (EFI_ERROR (Status)) {\r | |
434 | FreePool (SpareBuffer);\r | |
435 | return EFI_ABORTED;\r | |
436 | }\r | |
437 | //\r | |
438 | // Before erase the working block, set WorkingBlockInvalid in working block.\r | |
439 | //\r | |
440 | // Offset = OFFSET_OF(EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER,\r | |
441 | // WorkingBlockInvalid);\r | |
442 | //\r | |
443 | Status = FtwUpdateFvState (\r | |
444 | FtwDevice->FtwFvBlock,\r | |
445 | FtwDevice->FtwWorkSpaceLba,\r | |
446 | FtwDevice->FtwWorkSpaceBase + sizeof (EFI_GUID) + sizeof (UINT32),\r | |
447 | WORKING_BLOCK_INVALID\r | |
448 | );\r | |
449 | if (EFI_ERROR (Status)) {\r | |
450 | FreePool (SpareBuffer);\r | |
451 | return EFI_ABORTED;\r | |
452 | }\r | |
453 | \r | |
454 | FtwDevice->FtwWorkSpaceHeader->WorkingBlockInvalid = FTW_VALID_STATE;\r | |
455 | \r | |
456 | //\r | |
457 | // Write the spare block to working block\r | |
458 | //\r | |
459 | Status = FlushSpareBlockToWorkingBlock (FtwDevice);\r | |
460 | if (EFI_ERROR (Status)) {\r | |
461 | FreePool (SpareBuffer);\r | |
462 | return Status;\r | |
463 | }\r | |
464 | //\r | |
465 | // Restore spare backup buffer into spare block , if no failure happened during FtwWrite.\r | |
466 | //\r | |
467 | Status = FtwEraseSpareBlock (FtwDevice);\r | |
468 | Ptr = SpareBuffer;\r | |
469 | for (Index = 0; Index < FtwDevice->NumberOfSpareBlock; Index += 1) {\r | |
470 | Length = FtwDevice->BlockSize;\r | |
471 | Status = FtwDevice->FtwBackupFvb->Write (\r | |
472 | FtwDevice->FtwBackupFvb,\r | |
473 | FtwDevice->FtwSpareLba + Index,\r | |
474 | 0,\r | |
475 | &Length,\r | |
476 | Ptr\r | |
477 | );\r | |
478 | if (EFI_ERROR (Status)) {\r | |
479 | FreePool (SpareBuffer);\r | |
480 | return EFI_ABORTED;\r | |
481 | }\r | |
482 | \r | |
483 | Ptr += Length;\r | |
484 | }\r | |
485 | \r | |
486 | FreePool (SpareBuffer);\r | |
487 | \r | |
488 | DEBUG ((EFI_D_ERROR, "Ftw: reclaim work space successfully\n"));\r | |
489 | \r | |
490 | return EFI_SUCCESS;\r | |
491 | }\r |