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6cc9ca32 | 1 | /** @file\r |
d7dec593 | 2 | \r |
6cc9ca32 | 3 | This is a simple fault tolerant write driver.\r |
d7dec593 | 4 | And it only supports write BufferSize <= SpareAreaLength.\r |
5 | \r | |
5944a83b | 6 | This boot service protocol only provides fault tolerant write capability for \r |
d7dec593 | 7 | block devices. The protocol has internal non-volatile intermediate storage \r |
8 | of the data and private information. It should be able to recover \r | |
9 | automatically from a critical fault, such as power failure. \r | |
10 | \r | |
d7dec593 | 11 | The implementation uses an FTW Lite (Fault Tolerant Write) Work Space. \r |
da770255 | 12 | This work space is a memory copy of the work space on the Working Block,\r |
d7dec593 | 13 | the size of the work space is the FTW_WORK_SPACE_SIZE bytes.\r |
5944a83b LG |
14 | \r |
15 | The work space stores each write record as EFI_FTW_LITE_RECORD structure.\r | |
16 | The spare block stores the write buffer before write to the target block.\r | |
17 | \r | |
18 | The write record has three states to specify the different phase of write operation.\r | |
19 | 1) WRITE_ALLOCATED is that the record is allocated in write space.\r | |
20 | The write record structure records the information of write operation.\r | |
21 | 2) SPARE_COMPLETED is that the data from write buffer is writed into the spare block as the backup.\r | |
22 | 3) WRITE_COMPLETED is that the data is copied from the spare block to the target block.\r | |
23 | \r | |
24 | This driver operates the data as the whole size of spare block. It also assumes that \r | |
25 | working block is an area which contains working space in its last block and has the same size as spare block.\r | |
26 | It first read the SpareAreaLength data from the target block into the spare memory buffer.\r | |
27 | Then copy the write buffer data into the spare memory buffer.\r | |
28 | Then write the spare memory buffer into the spare block.\r | |
29 | Final copy the data from the spare block to the target block.\r | |
d7dec593 | 30 | \r |
6cc9ca32 LG |
31 | Copyright (c) 2006 - 2008, Intel Corporation \r |
32 | All rights reserved. This program and the accompanying materials \r | |
33 | are licensed and made available under the terms and conditions of the BSD License \r | |
34 | which accompanies this distribution. The full text of the license may be found at \r | |
35 | http://opensource.org/licenses/bsd-license.php \r | |
36 | \r | |
37 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
38 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
39 | \r | |
40 | **/\r | |
d7dec593 | 41 | \r |
e87a334f | 42 | #include "FtwLite.h"\r |
d7dec593 | 43 | \r |
6aab8214 | 44 | /**\r |
45 | Starts a target block update. This function will record data about write\r | |
46 | in fault tolerant storage and will complete the write in a recoverable\r | |
47 | manner, ensuring at all times that either the original contents or\r | |
5944a83b | 48 | the modified contents are available.\r |
6aab8214 | 49 | \r |
5944a83b | 50 | @param This The pointer to this protocol instance. \r |
6aab8214 | 51 | @param FvbHandle The handle of FVB protocol that provides services for\r |
52 | reading, writing, and erasing the target block.\r | |
53 | @param Lba The logical block address of the target block.\r | |
54 | @param Offset The offset within the target block to place the data.\r | |
55 | @param NumBytes The number of bytes to write to the target block.\r | |
56 | @param Buffer The data to write.\r | |
57 | \r | |
5944a83b LG |
58 | @retval EFI_SUCCESS The function completed successfully \r |
59 | @retval EFI_ABORTED The function could not complete successfully. \r | |
60 | @retval EFI_BAD_BUFFER_SIZE The input data can't fit within the spare block. \r | |
61 | Offset + *NumBytes > SpareAreaLength.\r | |
62 | @retval EFI_ACCESS_DENIED No writes have been allocated. \r | |
63 | @retval EFI_OUT_OF_RESOURCES Cannot allocate enough memory resource.\r | |
64 | @retval EFI_NOT_FOUND Cannot find FVB protocol by handle.\r | |
6aab8214 | 65 | \r |
66 | **/\r | |
d7dec593 | 67 | EFI_STATUS\r |
68 | EFIAPI\r | |
69 | FtwLiteWrite (\r | |
70 | IN EFI_FTW_LITE_PROTOCOL *This,\r | |
71 | IN EFI_HANDLE FvbHandle,\r | |
72 | IN EFI_LBA Lba,\r | |
73 | IN UINTN Offset,\r | |
74 | IN OUT UINTN *NumBytes,\r | |
75 | IN VOID *Buffer\r | |
76 | )\r | |
d7dec593 | 77 | {\r |
78 | EFI_STATUS Status;\r | |
79 | EFI_FTW_LITE_DEVICE *FtwLiteDevice;\r | |
80 | EFI_FTW_LITE_RECORD *Record;\r | |
81 | EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb;\r | |
82 | EFI_PHYSICAL_ADDRESS FvbPhysicalAddress;\r | |
83 | UINTN MyLength;\r | |
84 | UINTN MyOffset;\r | |
85 | UINTN MyBufferSize;\r | |
86 | UINT8 *MyBuffer;\r | |
87 | UINTN SpareBufferSize;\r | |
88 | UINT8 *SpareBuffer;\r | |
89 | UINTN Index;\r | |
90 | UINT8 *Ptr;\r | |
91 | EFI_DEV_PATH_PTR DevPtr;\r | |
92 | \r | |
93 | //\r | |
94 | // Refresh work space and get last record\r | |
95 | //\r | |
96 | FtwLiteDevice = FTW_LITE_CONTEXT_FROM_THIS (This);\r | |
97 | Status = WorkSpaceRefresh (FtwLiteDevice);\r | |
98 | if (EFI_ERROR (Status)) {\r | |
99 | return EFI_ABORTED;\r | |
100 | }\r | |
101 | \r | |
102 | Record = FtwLiteDevice->FtwLastRecord;\r | |
103 | \r | |
104 | //\r | |
105 | // Check the flags of last write record\r | |
106 | //\r | |
107 | if ((Record->WriteAllocated == FTW_VALID_STATE) || (Record->SpareCompleted == FTW_VALID_STATE)) {\r | |
108 | return EFI_ACCESS_DENIED;\r | |
109 | }\r | |
110 | //\r | |
111 | // IF former record has completed, THEN use next record\r | |
112 | //\r | |
113 | if (Record->WriteCompleted == FTW_VALID_STATE) {\r | |
114 | Record++;\r | |
115 | FtwLiteDevice->FtwLastRecord = Record;\r | |
116 | }\r | |
117 | \r | |
118 | MyOffset = (UINT8 *) Record - FtwLiteDevice->FtwWorkSpace;\r | |
119 | \r | |
120 | //\r | |
121 | // Check if the input data can fit within the target block\r | |
122 | //\r | |
123 | if ((Offset +*NumBytes) > FtwLiteDevice->SpareAreaLength) {\r | |
124 | return EFI_BAD_BUFFER_SIZE;\r | |
125 | }\r | |
126 | //\r | |
127 | // Check if there is enough free space for allocate a record\r | |
128 | //\r | |
5944a83b | 129 | if ((MyOffset + FTW_LITE_RECORD_SIZE) > FtwLiteDevice->FtwWorkSpaceSize) {\r |
e11ae3a5 | 130 | Status = FtwReclaimWorkSpace (FtwLiteDevice, TRUE);\r |
d7dec593 | 131 | if (EFI_ERROR (Status)) {\r |
132 | DEBUG ((EFI_D_ERROR, "FtwLite: Reclaim work space - %r", Status));\r | |
133 | return EFI_ABORTED;\r | |
134 | }\r | |
135 | }\r | |
136 | //\r | |
137 | // Get the FVB protocol by handle\r | |
138 | //\r | |
139 | Status = FtwGetFvbByHandle (FvbHandle, &Fvb);\r | |
140 | if (EFI_ERROR (Status)) {\r | |
141 | return EFI_NOT_FOUND;\r | |
142 | }\r | |
143 | //\r | |
144 | // Allocate a write record in workspace.\r | |
145 | // Update Header->WriteAllocated as VALID\r | |
146 | //\r | |
147 | Status = FtwUpdateFvState (\r | |
148 | FtwLiteDevice->FtwFvBlock,\r | |
149 | FtwLiteDevice->FtwWorkSpaceLba,\r | |
150 | FtwLiteDevice->FtwWorkSpaceBase + MyOffset,\r | |
151 | WRITE_ALLOCATED\r | |
152 | );\r | |
153 | \r | |
154 | if (EFI_ERROR (Status)) {\r | |
155 | DEBUG ((EFI_D_FTW_LITE, "FtwLite: Allocate record - %r\n", Status));\r | |
156 | return EFI_ABORTED;\r | |
157 | }\r | |
158 | \r | |
159 | Record->WriteAllocated = FTW_VALID_STATE;\r | |
160 | \r | |
161 | //\r | |
162 | // Prepare data of write record, filling DevPath with memory mapped address.\r | |
163 | //\r | |
164 | DevPtr.MemMap = (MEMMAP_DEVICE_PATH *) &Record->DevPath;\r | |
165 | DevPtr.MemMap->Header.Type = HARDWARE_DEVICE_PATH;\r | |
166 | DevPtr.MemMap->Header.SubType = HW_MEMMAP_DP;\r | |
167 | SetDevicePathNodeLength (&DevPtr.MemMap->Header, sizeof (MEMMAP_DEVICE_PATH));\r | |
168 | \r | |
169 | Status = Fvb->GetPhysicalAddress (Fvb, &FvbPhysicalAddress);\r | |
170 | if (EFI_ERROR (Status)) {\r | |
171 | DEBUG ((EFI_D_FTW_LITE, "FtwLite: Get FVB physical address - %r\n", Status));\r | |
172 | return EFI_ABORTED;\r | |
173 | }\r | |
174 | \r | |
175 | DevPtr.MemMap->MemoryType = EfiMemoryMappedIO;\r | |
176 | DevPtr.MemMap->StartingAddress = FvbPhysicalAddress;\r | |
177 | DevPtr.MemMap->EndingAddress = FvbPhysicalAddress +*NumBytes;\r | |
178 | //\r | |
179 | // ignored!\r | |
180 | //\r | |
181 | Record->Lba = Lba;\r | |
182 | Record->Offset = Offset;\r | |
183 | Record->NumBytes = *NumBytes;\r | |
184 | \r | |
185 | //\r | |
186 | // Write the record to the work space.\r | |
187 | //\r | |
188 | MyOffset = (UINT8 *) Record - FtwLiteDevice->FtwWorkSpace;\r | |
189 | MyLength = FTW_LITE_RECORD_SIZE;\r | |
190 | \r | |
191 | Status = FtwLiteDevice->FtwFvBlock->Write (\r | |
192 | FtwLiteDevice->FtwFvBlock,\r | |
193 | FtwLiteDevice->FtwWorkSpaceLba,\r | |
194 | FtwLiteDevice->FtwWorkSpaceBase + MyOffset,\r | |
195 | &MyLength,\r | |
196 | (UINT8 *) Record\r | |
197 | );\r | |
198 | if (EFI_ERROR (Status)) {\r | |
199 | return EFI_ABORTED;\r | |
200 | }\r | |
201 | //\r | |
202 | // Record has been written to working block, then write data.\r | |
203 | //\r | |
204 | //\r | |
205 | // Allocate a memory buffer\r | |
206 | //\r | |
207 | MyBufferSize = FtwLiteDevice->SpareAreaLength;\r | |
208 | MyBuffer = AllocatePool (MyBufferSize);\r | |
209 | if (MyBuffer == NULL) {\r | |
210 | return EFI_OUT_OF_RESOURCES;\r | |
211 | }\r | |
212 | //\r | |
213 | // Starting at Lba, if the number of the rest blocks on Fvb is less\r | |
214 | // than NumberOfSpareBlock.\r | |
215 | //\r | |
216 | //\r | |
217 | // Read all original data from target block to memory buffer\r | |
218 | //\r | |
219 | if (IsInWorkingBlock (FtwLiteDevice, Fvb, Lba)) {\r | |
220 | //\r | |
221 | // If target block falls into working block, we must follow the process of\r | |
222 | // updating working block.\r | |
223 | //\r | |
224 | Ptr = MyBuffer;\r | |
225 | for (Index = 0; Index < FtwLiteDevice->NumberOfSpareBlock; Index += 1) {\r | |
226 | MyLength = FtwLiteDevice->SizeOfSpareBlock;\r | |
227 | Status = FtwLiteDevice->FtwFvBlock->Read (\r | |
228 | FtwLiteDevice->FtwFvBlock,\r | |
229 | FtwLiteDevice->FtwWorkBlockLba + Index,\r | |
230 | 0,\r | |
231 | &MyLength,\r | |
232 | Ptr\r | |
233 | );\r | |
234 | if (EFI_ERROR (Status)) {\r | |
235 | FreePool (MyBuffer);\r | |
236 | return EFI_ABORTED;\r | |
237 | }\r | |
238 | \r | |
239 | Ptr += MyLength;\r | |
240 | }\r | |
241 | //\r | |
242 | // Update Offset by adding the offset from the start LBA of working block to\r | |
243 | // the target LBA. The target block can not span working block!\r | |
244 | //\r | |
245 | Offset = (((UINTN) (Lba - FtwLiteDevice->FtwWorkBlockLba)) * FtwLiteDevice->SizeOfSpareBlock + Offset);\r | |
246 | ASSERT ((Offset +*NumBytes) <= FtwLiteDevice->SpareAreaLength);\r | |
247 | \r | |
248 | } else {\r | |
249 | \r | |
250 | Ptr = MyBuffer;\r | |
251 | for (Index = 0; Index < FtwLiteDevice->NumberOfSpareBlock; Index += 1) {\r | |
252 | MyLength = FtwLiteDevice->SizeOfSpareBlock;\r | |
253 | Status = Fvb->Read (Fvb, Lba + Index, 0, &MyLength, Ptr);\r | |
254 | if (EFI_ERROR (Status)) {\r | |
255 | FreePool (MyBuffer);\r | |
256 | return EFI_ABORTED;\r | |
257 | }\r | |
258 | \r | |
259 | Ptr += MyLength;\r | |
260 | }\r | |
261 | }\r | |
262 | //\r | |
263 | // Overwrite the updating range data with\r | |
264 | // the input buffer content\r | |
265 | //\r | |
266 | CopyMem (MyBuffer + Offset, Buffer, *NumBytes);\r | |
267 | \r | |
268 | //\r | |
269 | // Try to keep the content of spare block\r | |
270 | // Save spare block into a spare backup memory buffer (Sparebuffer)\r | |
271 | //\r | |
272 | SpareBufferSize = FtwLiteDevice->SpareAreaLength;\r | |
273 | SpareBuffer = AllocatePool (SpareBufferSize);\r | |
274 | if (SpareBuffer == NULL) {\r | |
275 | FreePool (MyBuffer);\r | |
276 | return EFI_OUT_OF_RESOURCES;\r | |
277 | }\r | |
278 | \r | |
279 | Ptr = SpareBuffer;\r | |
280 | for (Index = 0; Index < FtwLiteDevice->NumberOfSpareBlock; Index += 1) {\r | |
281 | MyLength = FtwLiteDevice->SizeOfSpareBlock;\r | |
282 | Status = FtwLiteDevice->FtwBackupFvb->Read (\r | |
283 | FtwLiteDevice->FtwBackupFvb,\r | |
284 | FtwLiteDevice->FtwSpareLba + Index,\r | |
285 | 0,\r | |
286 | &MyLength,\r | |
287 | Ptr\r | |
288 | );\r | |
289 | if (EFI_ERROR (Status)) {\r | |
290 | FreePool (MyBuffer);\r | |
291 | FreePool (SpareBuffer);\r | |
292 | return EFI_ABORTED;\r | |
293 | }\r | |
294 | \r | |
295 | Ptr += MyLength;\r | |
296 | }\r | |
297 | //\r | |
298 | // Write the memory buffer to spare block\r | |
299 | // Don't forget to erase Flash first.\r | |
300 | //\r | |
301 | Status = FtwEraseSpareBlock (FtwLiteDevice);\r | |
302 | Ptr = MyBuffer;\r | |
303 | for (Index = 0; Index < FtwLiteDevice->NumberOfSpareBlock; Index += 1) {\r | |
304 | MyLength = FtwLiteDevice->SizeOfSpareBlock;\r | |
305 | Status = FtwLiteDevice->FtwBackupFvb->Write (\r | |
306 | FtwLiteDevice->FtwBackupFvb,\r | |
307 | FtwLiteDevice->FtwSpareLba + Index,\r | |
308 | 0,\r | |
309 | &MyLength,\r | |
310 | Ptr\r | |
311 | );\r | |
312 | if (EFI_ERROR (Status)) {\r | |
313 | FreePool (MyBuffer);\r | |
314 | FreePool (SpareBuffer);\r | |
315 | return EFI_ABORTED;\r | |
316 | }\r | |
317 | \r | |
318 | Ptr += MyLength;\r | |
319 | }\r | |
320 | //\r | |
321 | // Free MyBuffer\r | |
322 | //\r | |
323 | FreePool (MyBuffer);\r | |
324 | \r | |
325 | //\r | |
5944a83b | 326 | // Set the SpareComplete in the FTW record,\r |
d7dec593 | 327 | //\r |
328 | MyOffset = (UINT8 *) Record - FtwLiteDevice->FtwWorkSpace;\r | |
329 | Status = FtwUpdateFvState (\r | |
330 | FtwLiteDevice->FtwFvBlock,\r | |
331 | FtwLiteDevice->FtwWorkSpaceLba,\r | |
332 | FtwLiteDevice->FtwWorkSpaceBase + MyOffset,\r | |
333 | SPARE_COMPLETED\r | |
334 | );\r | |
335 | if (EFI_ERROR (Status)) {\r | |
336 | FreePool (SpareBuffer);\r | |
337 | return EFI_ABORTED;\r | |
338 | }\r | |
339 | \r | |
340 | Record->SpareCompleted = FTW_VALID_STATE;\r | |
341 | \r | |
342 | //\r | |
343 | // Since the content has already backuped in spare block, the write is\r | |
344 | // guaranteed to be completed with fault tolerant manner.\r | |
345 | //\r | |
346 | Status = FtwWriteRecord (FtwLiteDevice, Fvb);\r | |
347 | if (EFI_ERROR (Status)) {\r | |
348 | FreePool (SpareBuffer);\r | |
349 | return EFI_ABORTED;\r | |
350 | }\r | |
351 | \r | |
352 | Record++;\r | |
353 | FtwLiteDevice->FtwLastRecord = Record;\r | |
354 | \r | |
355 | //\r | |
356 | // Restore spare backup buffer into spare block , if no failure happened during FtwWrite.\r | |
357 | //\r | |
358 | Status = FtwEraseSpareBlock (FtwLiteDevice);\r | |
359 | Ptr = SpareBuffer;\r | |
360 | for (Index = 0; Index < FtwLiteDevice->NumberOfSpareBlock; Index += 1) {\r | |
361 | MyLength = FtwLiteDevice->SizeOfSpareBlock;\r | |
362 | Status = FtwLiteDevice->FtwBackupFvb->Write (\r | |
363 | FtwLiteDevice->FtwBackupFvb,\r | |
364 | FtwLiteDevice->FtwSpareLba + Index,\r | |
365 | 0,\r | |
366 | &MyLength,\r | |
367 | Ptr\r | |
368 | );\r | |
369 | if (EFI_ERROR (Status)) {\r | |
370 | FreePool (SpareBuffer);\r | |
371 | return EFI_ABORTED;\r | |
372 | }\r | |
373 | \r | |
374 | Ptr += MyLength;\r | |
375 | }\r | |
376 | //\r | |
377 | // All success.\r | |
378 | //\r | |
379 | FreePool (SpareBuffer);\r | |
380 | \r | |
381 | DEBUG (\r | |
382 | (EFI_D_FTW_LITE,\r | |
383 | "FtwLite: Write() success, (Lba:Offset)=(%lx:0x%x), NumBytes: 0x%x\n",\r | |
384 | Lba,\r | |
385 | Offset,\r | |
386 | *NumBytes)\r | |
387 | );\r | |
388 | \r | |
389 | return EFI_SUCCESS;\r | |
390 | }\r | |
391 | \r | |
392 | \r | |
6aab8214 | 393 | /**\r |
da770255 | 394 | Write a record with fault tolerant manner.\r |
6aab8214 | 395 | Since the content has already backuped in spare block, the write is\r |
396 | guaranteed to be completed with fault tolerant manner.\r | |
397 | \r | |
398 | \r | |
399 | @param FtwLiteDevice The private data of FTW_LITE driver\r | |
400 | @param Fvb The FVB protocol that provides services for\r | |
401 | reading, writing, and erasing the target block.\r | |
402 | \r | |
403 | @retval EFI_SUCCESS The function completed successfully\r | |
404 | @retval EFI_ABORTED The function could not complete successfully\r | |
405 | \r | |
406 | **/\r | |
d7dec593 | 407 | EFI_STATUS\r |
408 | FtwWriteRecord (\r | |
409 | IN EFI_FTW_LITE_DEVICE *FtwLiteDevice,\r | |
410 | IN EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb\r | |
411 | )\r | |
d7dec593 | 412 | {\r |
413 | EFI_STATUS Status;\r | |
414 | EFI_FTW_LITE_RECORD *Record;\r | |
415 | EFI_LBA WorkSpaceLbaOffset; \r | |
416 | UINTN Offset;\r | |
417 | \r | |
418 | //\r | |
419 | // Spare Complete but Destination not complete,\r | |
420 | // Recover the targt block with the spare block.\r | |
421 | //\r | |
422 | Record = FtwLiteDevice->FtwLastRecord;\r | |
423 | \r | |
424 | //\r | |
425 | // IF target block is working block, THEN Flush Spare Block To Working Block;\r | |
426 | // ELSE IF target block is boot block, THEN Flush Spare Block To boot Block;\r | |
427 | // ELSE flush spare block to normal target block.ENDIF\r | |
428 | //\r | |
429 | if (IsInWorkingBlock (FtwLiteDevice, Fvb, Record->Lba)) {\r | |
430 | //\r | |
431 | // If target block is working block, Attention:\r | |
432 | // it's required to set SPARE_COMPLETED to spare block.\r | |
433 | //\r | |
434 | WorkSpaceLbaOffset = FtwLiteDevice->FtwWorkSpaceLba - FtwLiteDevice->FtwWorkBlockLba;\r | |
435 | Offset = (UINT8 *) Record - FtwLiteDevice->FtwWorkSpace;\r | |
436 | Status = FtwUpdateFvState (\r | |
437 | FtwLiteDevice->FtwBackupFvb,\r | |
438 | FtwLiteDevice->FtwSpareLba + WorkSpaceLbaOffset,\r | |
439 | FtwLiteDevice->FtwWorkSpaceBase + Offset,\r | |
440 | SPARE_COMPLETED\r | |
441 | );\r | |
442 | ASSERT_EFI_ERROR (Status);\r | |
443 | \r | |
444 | Status = FlushSpareBlockToWorkingBlock (FtwLiteDevice);\r | |
d7dec593 | 445 | } else {\r |
446 | //\r | |
447 | // Update blocks other than working block or boot block\r | |
448 | //\r | |
449 | Status = FlushSpareBlockToTargetBlock (FtwLiteDevice, Fvb, Record->Lba);\r | |
450 | }\r | |
451 | \r | |
452 | ASSERT_EFI_ERROR (Status);\r | |
453 | \r | |
454 | //\r | |
455 | // Set WriteCompleted flag in record\r | |
456 | //\r | |
457 | Offset = (UINT8 *) Record - FtwLiteDevice->FtwWorkSpace;\r | |
458 | Status = FtwUpdateFvState (\r | |
459 | FtwLiteDevice->FtwFvBlock,\r | |
460 | FtwLiteDevice->FtwWorkSpaceLba,\r | |
461 | FtwLiteDevice->FtwWorkSpaceBase + Offset,\r | |
462 | WRITE_COMPLETED\r | |
463 | );\r | |
464 | ASSERT_EFI_ERROR (Status);\r | |
465 | \r | |
466 | Record->WriteCompleted = FTW_VALID_STATE;\r | |
467 | return EFI_SUCCESS;\r | |
468 | }\r | |
469 | \r | |
470 | \r | |
6aab8214 | 471 | /**\r |
472 | Restarts a previously interrupted write. The caller must provide the\r | |
473 | block protocol needed to complete the interrupted write.\r | |
474 | \r | |
475 | \r | |
476 | @param FtwLiteDevice The private data of FTW_LITE driver\r | |
477 | FvbHandle - The handle of FVB protocol that provides services for\r | |
478 | reading, writing, and erasing the target block.\r | |
479 | \r | |
480 | @retval EFI_SUCCESS The function completed successfully\r | |
481 | @retval EFI_ACCESS_DENIED No pending writes exist\r | |
482 | @retval EFI_NOT_FOUND FVB protocol not found by the handle\r | |
483 | @retval EFI_ABORTED The function could not complete successfully\r | |
484 | \r | |
485 | **/\r | |
d7dec593 | 486 | EFI_STATUS\r |
487 | FtwRestart (\r | |
488 | IN EFI_FTW_LITE_DEVICE *FtwLiteDevice\r | |
489 | )\r | |
d7dec593 | 490 | {\r |
491 | EFI_STATUS Status;\r | |
492 | EFI_FTW_LITE_RECORD *Record;\r | |
493 | EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb;\r | |
494 | EFI_DEV_PATH_PTR DevPathPtr;\r | |
495 | \r | |
496 | //\r | |
497 | // Spare Completed but Destination not complete,\r | |
498 | // Recover the targt block with the spare block.\r | |
499 | //\r | |
500 | Record = FtwLiteDevice->FtwLastRecord;\r | |
501 | \r | |
502 | //\r | |
503 | // Only support memory mapped FVB device path by now.\r | |
504 | //\r | |
505 | DevPathPtr.MemMap = (MEMMAP_DEVICE_PATH *) &Record->DevPath;\r | |
506 | if (!((DevPathPtr.MemMap->Header.Type == HARDWARE_DEVICE_PATH) && (DevPathPtr.MemMap->Header.SubType == HW_MEMMAP_DP))\r | |
507 | ) {\r | |
508 | DEBUG ((EFI_D_FTW_LITE, "FtwLite: FVB Device Path is not memory mapped\n"));\r | |
509 | return EFI_ABORTED;\r | |
510 | }\r | |
511 | \r | |
512 | Status = GetFvbByAddress (DevPathPtr.MemMap->StartingAddress, &Fvb);\r | |
513 | if (EFI_ERROR (Status)) {\r | |
514 | return EFI_NOT_FOUND;\r | |
515 | }\r | |
516 | //\r | |
517 | // Since the content has already backuped in spare block, the write is\r | |
518 | // guaranteed to be completed with fault tolerant manner.\r | |
519 | //\r | |
520 | Status = FtwWriteRecord (FtwLiteDevice, Fvb);\r | |
521 | DEBUG ((EFI_D_FTW_INFO, "FtwLite: Restart() - %r\n", Status));\r | |
522 | \r | |
523 | Record++;\r | |
524 | FtwLiteDevice->FtwLastRecord = Record;\r | |
525 | \r | |
526 | //\r | |
527 | // Erase Spare block\r | |
528 | // This is restart, no need to keep spareblock content.\r | |
529 | //\r | |
530 | FtwEraseSpareBlock (FtwLiteDevice);\r | |
531 | \r | |
532 | return Status;\r | |
533 | }\r | |
534 | \r | |
535 | \r | |
6aab8214 | 536 | /**\r |
537 | Aborts all previous allocated writes.\r | |
d7dec593 | 538 | \r |
d7dec593 | 539 | \r |
6aab8214 | 540 | @param FtwLiteDevice The private data of FTW_LITE driver\r |
d7dec593 | 541 | \r |
6aab8214 | 542 | @retval EFI_SUCCESS The function completed successfully\r |
543 | @retval EFI_ABORTED The function could not complete successfully.\r | |
544 | @retval EFI_NOT_FOUND No allocated writes exist.\r | |
d7dec593 | 545 | \r |
6aab8214 | 546 | **/\r |
547 | EFI_STATUS\r | |
548 | FtwAbort (\r | |
549 | IN EFI_FTW_LITE_DEVICE *FtwLiteDevice\r | |
550 | )\r | |
d7dec593 | 551 | {\r |
552 | EFI_STATUS Status;\r | |
553 | UINTN Offset;\r | |
554 | \r | |
555 | if (FtwLiteDevice->FtwLastRecord->WriteCompleted == FTW_VALID_STATE) {\r | |
556 | return EFI_NOT_FOUND;\r | |
557 | }\r | |
558 | //\r | |
559 | // Update the complete state of the header as VALID and abort.\r | |
560 | //\r | |
561 | Offset = (UINT8 *) FtwLiteDevice->FtwLastRecord - FtwLiteDevice->FtwWorkSpace;\r | |
562 | Status = FtwUpdateFvState (\r | |
563 | FtwLiteDevice->FtwFvBlock,\r | |
564 | FtwLiteDevice->FtwWorkSpaceLba,\r | |
565 | FtwLiteDevice->FtwWorkSpaceBase + Offset,\r | |
566 | WRITE_COMPLETED\r | |
567 | );\r | |
568 | if (EFI_ERROR (Status)) {\r | |
569 | return EFI_ABORTED;\r | |
570 | }\r | |
571 | \r | |
572 | FtwLiteDevice->FtwLastRecord->WriteCompleted = FTW_VALID_STATE;\r | |
573 | \r | |
574 | Status = FtwGetLastRecord (FtwLiteDevice, &FtwLiteDevice->FtwLastRecord);\r | |
575 | \r | |
576 | //\r | |
577 | // Erase the spare block\r | |
578 | //\r | |
579 | Status = FtwEraseSpareBlock (FtwLiteDevice);\r | |
580 | \r | |
581 | DEBUG ((EFI_D_FTW_INFO, "FtwLite: Abort() success \n"));\r | |
582 | return EFI_SUCCESS;\r | |
583 | }\r | |
584 | \r | |
6aab8214 | 585 | /**\r |
586 | This function is the entry point of the Fault Tolerant Write driver.\r | |
587 | \r | |
da770255 | 588 | @param ImageHandle A handle for the image that is initializing this driver\r |
589 | @param SystemTable A pointer to the EFI system table\r | |
6aab8214 | 590 | \r |
591 | @retval EFI_SUCCESS FTW has finished the initialization\r | |
592 | @retval EFI_ABORTED FTW initialization error\r | |
593 | \r | |
594 | **/\r | |
d7dec593 | 595 | EFI_STATUS\r |
596 | EFIAPI\r | |
597 | InitializeFtwLite (\r | |
598 | IN EFI_HANDLE ImageHandle,\r | |
599 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
600 | )\r | |
d7dec593 | 601 | {\r |
602 | EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb;\r | |
603 | UINTN Index;\r | |
604 | EFI_HANDLE *HandleBuffer;\r | |
605 | UINTN HandleCount;\r | |
606 | EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;\r | |
607 | EFI_PHYSICAL_ADDRESS BaseAddress;\r | |
608 | EFI_FTW_LITE_DEVICE *FtwLiteDevice;\r | |
609 | EFI_FTW_LITE_RECORD *Record;\r | |
610 | UINTN Length;\r | |
611 | EFI_STATUS Status;\r | |
612 | UINTN Offset;\r | |
613 | EFI_FV_BLOCK_MAP_ENTRY *FvbMapEntry;\r | |
614 | UINT32 LbaIndex;\r | |
276be2de | 615 | \r |
d7dec593 | 616 | //\r |
da770255 | 617 | // Allocate Private data of this driver, including the FtwWorkSpace[FTW_WORK_SPACE_SIZE].\r |
d7dec593 | 618 | //\r |
5944a83b LG |
619 | Length = FTW_WORK_SPACE_SIZE;\r |
620 | if (Length < PcdGet32 (PcdFlashNvStorageFtwWorkingSize)) {\r | |
621 | Length = PcdGet32 (PcdFlashNvStorageFtwWorkingSize);\r | |
622 | }\r | |
623 | \r | |
d7dec593 | 624 | FtwLiteDevice = NULL;\r |
5944a83b | 625 | FtwLiteDevice = AllocatePool (sizeof (EFI_FTW_LITE_DEVICE) + Length);\r |
d7dec593 | 626 | if (FtwLiteDevice != NULL) {\r |
627 | Status = EFI_SUCCESS;\r | |
628 | } else {\r | |
629 | Status = EFI_OUT_OF_RESOURCES;\r | |
630 | }\r | |
631 | \r | |
632 | ASSERT_EFI_ERROR (Status);\r | |
633 | \r | |
634 | ZeroMem (FtwLiteDevice, sizeof (EFI_FTW_LITE_DEVICE));\r | |
635 | FtwLiteDevice->Signature = FTW_LITE_DEVICE_SIGNATURE;\r | |
636 | \r | |
637 | //\r | |
638 | // Initialize other parameters, and set WorkSpace as FTW_ERASED_BYTE.\r | |
639 | //\r | |
640 | FtwLiteDevice->FtwWorkSpace = (UINT8 *) (FtwLiteDevice + 1);\r | |
641 | FtwLiteDevice->FtwWorkSpaceSize = FTW_WORK_SPACE_SIZE;\r | |
5944a83b | 642 | FtwLiteDevice->FtwWorkSpaceBase = FTW_WORK_SPACE_BASE;\r |
d7dec593 | 643 | SetMem (\r |
644 | FtwLiteDevice->FtwWorkSpace,\r | |
645 | FtwLiteDevice->FtwWorkSpaceSize,\r | |
646 | FTW_ERASED_BYTE\r | |
647 | );\r | |
648 | FtwLiteDevice->FtwWorkSpaceHeader = (EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER *) FtwLiteDevice->FtwWorkSpace;\r | |
649 | \r | |
650 | FtwLiteDevice->FtwLastRecord = NULL;\r | |
651 | \r | |
276be2de | 652 | FtwLiteDevice->WorkSpaceAddress = (EFI_PHYSICAL_ADDRESS) PcdGet32 (PcdFlashNvStorageFtwWorkingBase);\r |
653 | FtwLiteDevice->WorkSpaceLength = (UINTN) PcdGet32 (PcdFlashNvStorageFtwWorkingSize);\r | |
654 | \r | |
655 | FtwLiteDevice->SpareAreaAddress = (EFI_PHYSICAL_ADDRESS) PcdGet32 (PcdFlashNvStorageFtwSpareBase);\r | |
656 | FtwLiteDevice->SpareAreaLength = (UINTN) PcdGet32 (PcdFlashNvStorageFtwSpareSize);\r | |
d7dec593 | 657 | \r |
658 | ASSERT ((FtwLiteDevice->WorkSpaceLength != 0) && (FtwLiteDevice->SpareAreaLength != 0));\r | |
659 | \r | |
660 | //\r | |
661 | // Locate FVB protocol\r | |
662 | //\r | |
663 | Status = gBS->LocateHandleBuffer (\r | |
664 | ByProtocol,\r | |
665 | &gEfiFirmwareVolumeBlockProtocolGuid,\r | |
666 | NULL,\r | |
667 | &HandleCount,\r | |
668 | &HandleBuffer\r | |
669 | );\r | |
670 | ASSERT_EFI_ERROR (Status);\r | |
671 | \r | |
672 | ASSERT (HandleCount > 0);\r | |
673 | \r | |
674 | FtwLiteDevice->FtwFvBlock = NULL;\r | |
675 | FtwLiteDevice->FtwBackupFvb = NULL;\r | |
676 | FtwLiteDevice->FtwWorkSpaceLba = (EFI_LBA) (-1);\r | |
677 | FtwLiteDevice->FtwSpareLba = (EFI_LBA) (-1);\r | |
678 | for (Index = 0; Index < HandleCount; Index += 1) {\r | |
679 | Status = gBS->HandleProtocol (\r | |
680 | HandleBuffer[Index],\r | |
681 | &gEfiFirmwareVolumeBlockProtocolGuid,\r | |
682 | (VOID **) &Fvb\r | |
683 | );\r | |
684 | ASSERT_EFI_ERROR (Status);\r | |
685 | \r | |
686 | Status = Fvb->GetPhysicalAddress (Fvb, &BaseAddress);\r | |
687 | if (EFI_ERROR (Status)) {\r | |
688 | continue;\r | |
689 | }\r | |
690 | \r | |
691 | FwVolHeader = (EFI_FIRMWARE_VOLUME_HEADER *) ((UINTN) BaseAddress);\r | |
692 | \r | |
693 | if ((FtwLiteDevice->WorkSpaceAddress >= BaseAddress) &&\r | |
5944a83b | 694 | (FtwLiteDevice->WorkSpaceAddress < (BaseAddress + FwVolHeader->FvLength))\r |
d7dec593 | 695 | ) {\r |
696 | FtwLiteDevice->FtwFvBlock = Fvb;\r | |
697 | //\r | |
698 | // To get the LBA of work space\r | |
699 | //\r | |
700 | if ((FwVolHeader->FvLength) > (FwVolHeader->HeaderLength)) {\r | |
701 | //\r | |
702 | // FV may have multiple types of BlockLength\r | |
703 | //\r | |
704 | FvbMapEntry = &FwVolHeader->BlockMap[0];\r | |
705 | while (!((FvbMapEntry->NumBlocks == 0) && (FvbMapEntry->Length == 0))) {\r | |
706 | for (LbaIndex = 1; LbaIndex <= FvbMapEntry->NumBlocks; LbaIndex += 1) {\r | |
5944a83b LG |
707 | if ((FtwLiteDevice->WorkSpaceAddress >= (BaseAddress + FvbMapEntry->Length * (LbaIndex - 1)))\r |
708 | && (FtwLiteDevice->WorkSpaceAddress < (BaseAddress + FvbMapEntry->Length * LbaIndex))) {\r | |
d7dec593 | 709 | FtwLiteDevice->FtwWorkSpaceLba = LbaIndex - 1;\r |
710 | //\r | |
711 | // Get the Work space size and Base(Offset)\r | |
712 | //\r | |
713 | FtwLiteDevice->FtwWorkSpaceSize = FtwLiteDevice->WorkSpaceLength;\r | |
714 | FtwLiteDevice->FtwWorkSpaceBase = (UINTN) (FtwLiteDevice->WorkSpaceAddress - (BaseAddress + FvbMapEntry->Length * (LbaIndex - 1)));\r | |
715 | break;\r | |
716 | }\r | |
717 | }\r | |
718 | //\r | |
719 | // end for\r | |
720 | //\r | |
5944a83b LG |
721 | if (LbaIndex <= FvbMapEntry->NumBlocks) {\r |
722 | //\r | |
723 | // Work space range is found.\r | |
724 | //\r | |
725 | break;\r | |
726 | }\r | |
d7dec593 | 727 | FvbMapEntry++;\r |
728 | }\r | |
729 | //\r | |
730 | // end while\r | |
731 | //\r | |
732 | }\r | |
733 | }\r | |
734 | \r | |
735 | if ((FtwLiteDevice->SpareAreaAddress >= BaseAddress) &&\r | |
78d6fbd5 | 736 | (FtwLiteDevice->SpareAreaAddress < (BaseAddress + FwVolHeader->FvLength))\r |
d7dec593 | 737 | ) {\r |
738 | FtwLiteDevice->FtwBackupFvb = Fvb;\r | |
739 | //\r | |
740 | // To get the LBA of spare\r | |
741 | //\r | |
742 | if ((FwVolHeader->FvLength) > (FwVolHeader->HeaderLength)) {\r | |
743 | //\r | |
744 | // FV may have multiple types of BlockLength\r | |
745 | //\r | |
746 | FvbMapEntry = &FwVolHeader->BlockMap[0];\r | |
747 | while (!((FvbMapEntry->NumBlocks == 0) && (FvbMapEntry->Length == 0))) {\r | |
748 | for (LbaIndex = 1; LbaIndex <= FvbMapEntry->NumBlocks; LbaIndex += 1) {\r | |
5944a83b LG |
749 | if ((FtwLiteDevice->SpareAreaAddress >= (BaseAddress + FvbMapEntry->Length * (LbaIndex - 1)))\r |
750 | && (FtwLiteDevice->SpareAreaAddress < (BaseAddress + FvbMapEntry->Length * LbaIndex))) {\r | |
d7dec593 | 751 | //\r |
752 | // Get the NumberOfSpareBlock and SizeOfSpareBlock\r | |
753 | //\r | |
754 | FtwLiteDevice->FtwSpareLba = LbaIndex - 1;\r | |
755 | FtwLiteDevice->SizeOfSpareBlock = FvbMapEntry->Length;\r | |
756 | FtwLiteDevice->NumberOfSpareBlock = FtwLiteDevice->SpareAreaLength / FtwLiteDevice->SizeOfSpareBlock;\r | |
757 | //\r | |
758 | // Check the range of spare area to make sure that it's in FV range\r | |
759 | //\r | |
760 | ASSERT ((FtwLiteDevice->FtwSpareLba + FtwLiteDevice->NumberOfSpareBlock) <= FvbMapEntry->NumBlocks);\r | |
761 | break;\r | |
762 | }\r | |
763 | }\r | |
5944a83b LG |
764 | if (LbaIndex <= FvbMapEntry->NumBlocks) {\r |
765 | //\r | |
766 | // Spare FV range is found.\r | |
767 | //\r | |
768 | break;\r | |
769 | }\r | |
d7dec593 | 770 | FvbMapEntry++;\r |
771 | }\r | |
772 | //\r | |
773 | // end while\r | |
774 | //\r | |
775 | }\r | |
776 | }\r | |
777 | }\r | |
778 | //\r | |
779 | // Calculate the start LBA of working block. Working block is an area which\r | |
780 | // contains working space in its last block and has the same size as spare\r | |
781 | // block, unless there are not enough blocks before the block that contains\r | |
782 | // working space.\r | |
783 | //\r | |
784 | FtwLiteDevice->FtwWorkBlockLba = FtwLiteDevice->FtwWorkSpaceLba - FtwLiteDevice->NumberOfSpareBlock + 1;\r | |
785 | if ((INT64) (FtwLiteDevice->FtwWorkBlockLba) < 0) {\r | |
786 | FtwLiteDevice->FtwWorkBlockLba = 0;\r | |
787 | }\r | |
788 | \r | |
789 | if ((FtwLiteDevice->FtwFvBlock == NULL) ||\r | |
790 | (FtwLiteDevice->FtwBackupFvb == NULL) ||\r | |
791 | (FtwLiteDevice->FtwWorkSpaceLba == (EFI_LBA) (-1)) ||\r | |
792 | (FtwLiteDevice->FtwSpareLba == (EFI_LBA) (-1))\r | |
793 | ) {\r | |
794 | DEBUG ((EFI_D_ERROR, "FtwLite: Working or spare FVB not ready\n"));\r | |
795 | ASSERT_EFI_ERROR (Status);\r | |
796 | }\r | |
797 | //\r | |
798 | // Refresh workspace data from working block\r | |
799 | //\r | |
800 | Status = WorkSpaceRefresh (FtwLiteDevice);\r | |
801 | ASSERT_EFI_ERROR (Status);\r | |
802 | \r | |
803 | //\r | |
804 | // If the working block workspace is not valid, try the spare block\r | |
805 | //\r | |
806 | if (!IsValidWorkSpace (FtwLiteDevice->FtwWorkSpaceHeader)) {\r | |
807 | DEBUG ((EFI_D_FTW_LITE, "FtwLite: Workspace invalid, read from backup\n"));\r | |
808 | //\r | |
809 | // Read from spare block\r | |
810 | //\r | |
811 | Length = FtwLiteDevice->FtwWorkSpaceSize;\r | |
812 | Status = FtwLiteDevice->FtwBackupFvb->Read (\r | |
813 | FtwLiteDevice->FtwBackupFvb,\r | |
814 | FtwLiteDevice->FtwSpareLba,\r | |
815 | FtwLiteDevice->FtwWorkSpaceBase,\r | |
816 | &Length,\r | |
817 | FtwLiteDevice->FtwWorkSpace\r | |
818 | );\r | |
819 | ASSERT_EFI_ERROR (Status);\r | |
820 | \r | |
821 | //\r | |
822 | // If spare block is valid, then replace working block content.\r | |
823 | //\r | |
824 | if (IsValidWorkSpace (FtwLiteDevice->FtwWorkSpaceHeader)) {\r | |
825 | Status = FlushSpareBlockToWorkingBlock (FtwLiteDevice);\r | |
826 | DEBUG ((EFI_D_FTW_LITE, "FtwLite: Restart working block in Init() - %r\n", Status));\r | |
827 | ASSERT_EFI_ERROR (Status);\r | |
828 | \r | |
829 | FtwAbort (FtwLiteDevice);\r | |
830 | //\r | |
831 | // Refresh work space.\r | |
832 | //\r | |
833 | Status = WorkSpaceRefresh (FtwLiteDevice);\r | |
834 | if (EFI_ERROR (Status)) {\r | |
835 | return EFI_ABORTED;\r | |
836 | }\r | |
837 | } else {\r | |
838 | DEBUG ((EFI_D_FTW_LITE, "FtwLite: Both are invalid, init workspace\n"));\r | |
839 | //\r | |
840 | // If both are invalid, then initialize work space.\r | |
841 | //\r | |
842 | SetMem (\r | |
843 | FtwLiteDevice->FtwWorkSpace,\r | |
844 | FtwLiteDevice->FtwWorkSpaceSize,\r | |
845 | FTW_ERASED_BYTE\r | |
846 | );\r | |
847 | InitWorkSpaceHeader (FtwLiteDevice->FtwWorkSpaceHeader);\r | |
848 | //\r | |
e11ae3a5 | 849 | // Initialize the work space\r |
d7dec593 | 850 | //\r |
e11ae3a5 LG |
851 | Status = FtwReclaimWorkSpace (FtwLiteDevice, FALSE);\r |
852 | \r | |
d7dec593 | 853 | if (EFI_ERROR (Status)) {\r |
854 | return EFI_ABORTED;\r | |
855 | }\r | |
856 | }\r | |
857 | }\r | |
858 | //\r | |
859 | // Hook the protocol API\r | |
860 | //\r | |
861 | FtwLiteDevice->FtwLiteInstance.Write = FtwLiteWrite;\r | |
862 | \r | |
863 | //\r | |
864 | // Install protocol interface\r | |
865 | //\r | |
866 | Status = gBS->InstallProtocolInterface (\r | |
867 | &FtwLiteDevice->Handle,\r | |
868 | &gEfiFaultTolerantWriteLiteProtocolGuid,\r | |
869 | EFI_NATIVE_INTERFACE,\r | |
870 | &FtwLiteDevice->FtwLiteInstance\r | |
871 | );\r | |
872 | if (EFI_ERROR (Status)) {\r | |
873 | return EFI_ABORTED;\r | |
874 | }\r | |
875 | //\r | |
876 | // If (!SpareCompleted) THEN Abort to rollback.\r | |
877 | //\r | |
878 | if ((FtwLiteDevice->FtwLastRecord->WriteAllocated == FTW_VALID_STATE) &&\r | |
879 | (FtwLiteDevice->FtwLastRecord->SpareCompleted != FTW_VALID_STATE)\r | |
880 | ) {\r | |
881 | DEBUG ((EFI_D_FTW_LITE, "FtwLite: Init.. record not SpareCompleted, abort()\n"));\r | |
882 | FtwAbort (FtwLiteDevice);\r | |
883 | }\r | |
884 | //\r | |
885 | // if (SpareCompleted) THEN Restart to fault tolerant write.\r | |
886 | //\r | |
887 | if ((FtwLiteDevice->FtwLastRecord->SpareCompleted == FTW_VALID_STATE) &&\r | |
888 | (FtwLiteDevice->FtwLastRecord->WriteCompleted != FTW_VALID_STATE)\r | |
889 | ) {\r | |
890 | \r | |
891 | Status = FtwRestart (FtwLiteDevice);\r | |
892 | DEBUG ((EFI_D_FTW_LITE, "FtwLite: Restart last write - %r\n", Status));\r | |
893 | if (EFI_ERROR (Status)) {\r | |
894 | return Status;\r | |
895 | }\r | |
896 | }\r | |
897 | //\r | |
898 | // To check the workspace buffer behind last records is EMPTY or not.\r | |
899 | // If it's not EMPTY, FTW_LITE also need to call reclaim().\r | |
900 | //\r | |
901 | Record = FtwLiteDevice->FtwLastRecord;\r | |
902 | Offset = (UINT8 *) Record - FtwLiteDevice->FtwWorkSpace;\r | |
903 | if (FtwLiteDevice->FtwWorkSpace[Offset] != FTW_ERASED_BYTE) {\r | |
5944a83b | 904 | Offset += FTW_LITE_RECORD_SIZE;\r |
d7dec593 | 905 | }\r |
906 | \r | |
907 | if (!IsErasedFlashBuffer (\r | |
908 | FTW_ERASE_POLARITY,\r | |
909 | FtwLiteDevice->FtwWorkSpace + Offset,\r | |
910 | FtwLiteDevice->FtwWorkSpaceSize - Offset\r | |
911 | )) {\r | |
912 | DEBUG ((EFI_D_FTW_LITE, "FtwLite: Workspace is dirty, call reclaim...\n"));\r | |
e11ae3a5 | 913 | Status = FtwReclaimWorkSpace (FtwLiteDevice, TRUE);\r |
d7dec593 | 914 | if (EFI_ERROR (Status)) {\r |
915 | DEBUG ((EFI_D_FTW_LITE, "FtwLite: Workspace reclaim - %r\n", Status));\r | |
916 | return EFI_ABORTED;\r | |
917 | }\r | |
918 | }\r | |
919 | \r | |
920 | return EFI_SUCCESS;\r | |
921 | }\r |