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Commit | Line | Data |
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6cc9ca32 | 1 | /** @file\r |
d7dec593 | 2 | \r |
6cc9ca32 | 3 | This is a simple fault tolerant write driver.\r |
d7dec593 | 4 | \r |
5944a83b | 5 | This boot service protocol only provides fault tolerant write capability for \r |
d7dec593 | 6 | block devices. The protocol has internal non-volatile intermediate storage \r |
7 | of the data and private information. It should be able to recover \r | |
8 | automatically from a critical fault, such as power failure. \r | |
9 | \r | |
d7dec593 | 10 | The implementation uses an FTW Lite (Fault Tolerant Write) Work Space. \r |
da770255 | 11 | This work space is a memory copy of the work space on the Working Block,\r |
d7dec593 | 12 | the size of the work space is the FTW_WORK_SPACE_SIZE bytes.\r |
5944a83b LG |
13 | \r |
14 | The work space stores each write record as EFI_FTW_LITE_RECORD structure.\r | |
15 | The spare block stores the write buffer before write to the target block.\r | |
16 | \r | |
17 | The write record has three states to specify the different phase of write operation.\r | |
18 | 1) WRITE_ALLOCATED is that the record is allocated in write space.\r | |
8986b8cd | 19 | The information of write operation is stored in write record structure.\r |
5944a83b LG |
20 | 2) SPARE_COMPLETED is that the data from write buffer is writed into the spare block as the backup.\r |
21 | 3) WRITE_COMPLETED is that the data is copied from the spare block to the target block.\r | |
22 | \r | |
276a49b6 | 23 | This driver operates the data as the whole size of spare block.\r |
5944a83b LG |
24 | It first read the SpareAreaLength data from the target block into the spare memory buffer.\r |
25 | Then copy the write buffer data into the spare memory buffer.\r | |
26 | Then write the spare memory buffer into the spare block.\r | |
27 | Final copy the data from the spare block to the target block.\r | |
d7dec593 | 28 | \r |
276a49b6 LG |
29 | To make this drive work well, the following conditions must be satisfied:\r |
30 | 1. The write NumBytes data must be fit within Spare area. \r | |
31 | Offset + NumBytes <= SpareAreaLength\r | |
32 | 2. The whole flash range has the same block size.\r | |
33 | 3. Working block is an area which contains working space in its last block and has the same size as spare block.\r | |
34 | 4. Working Block area must be in the single one Firmware Volume Block range which FVB protocol is produced on. \r | |
35 | 5. Spare area must be in the single one Firmware Volume Block range which FVB protocol is produced on.\r | |
36 | 6. Any write data area (SpareAreaLength Area) which the data will be written into must be \r | |
37 | in the single one Firmware Volume Block range which FVB protocol is produced on.\r | |
38 | 7. If write data area (such as Variable range) is enlarged, the spare area range must be enlarged.\r | |
39 | The spare area must be enough large to store the write data before write them into the target range.\r | |
40 | If one of them is not satisfied, FtwLiteWrite may fail.\r | |
41 | Usually, Spare area only takes one block. That's SpareAreaLength = BlockSize, NumberOfSpareBlock = 1.\r | |
42 | \r | |
43 | Copyright (c) 2006 - 2009, Intel Corporation \r | |
6cc9ca32 LG |
44 | All rights reserved. This program and the accompanying materials \r |
45 | are licensed and made available under the terms and conditions of the BSD License \r | |
46 | which accompanies this distribution. The full text of the license may be found at \r | |
47 | http://opensource.org/licenses/bsd-license.php \r | |
48 | \r | |
49 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
50 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
51 | \r | |
52 | **/\r | |
d7dec593 | 53 | \r |
e87a334f | 54 | #include "FtwLite.h"\r |
d7dec593 | 55 | \r |
6aab8214 | 56 | /**\r |
57 | Starts a target block update. This function will record data about write\r | |
58 | in fault tolerant storage and will complete the write in a recoverable\r | |
59 | manner, ensuring at all times that either the original contents or\r | |
5944a83b | 60 | the modified contents are available.\r |
6aab8214 | 61 | \r |
5944a83b | 62 | @param This The pointer to this protocol instance. \r |
6aab8214 | 63 | @param FvbHandle The handle of FVB protocol that provides services for\r |
64 | reading, writing, and erasing the target block.\r | |
65 | @param Lba The logical block address of the target block.\r | |
66 | @param Offset The offset within the target block to place the data.\r | |
67 | @param NumBytes The number of bytes to write to the target block.\r | |
68 | @param Buffer The data to write.\r | |
69 | \r | |
5944a83b LG |
70 | @retval EFI_SUCCESS The function completed successfully \r |
71 | @retval EFI_ABORTED The function could not complete successfully. \r | |
72 | @retval EFI_BAD_BUFFER_SIZE The input data can't fit within the spare block. \r | |
73 | Offset + *NumBytes > SpareAreaLength.\r | |
74 | @retval EFI_ACCESS_DENIED No writes have been allocated. \r | |
75 | @retval EFI_OUT_OF_RESOURCES Cannot allocate enough memory resource.\r | |
76 | @retval EFI_NOT_FOUND Cannot find FVB protocol by handle.\r | |
6aab8214 | 77 | \r |
78 | **/\r | |
d7dec593 | 79 | EFI_STATUS\r |
80 | EFIAPI\r | |
81 | FtwLiteWrite (\r | |
82 | IN EFI_FTW_LITE_PROTOCOL *This,\r | |
83 | IN EFI_HANDLE FvbHandle,\r | |
84 | IN EFI_LBA Lba,\r | |
85 | IN UINTN Offset,\r | |
86 | IN OUT UINTN *NumBytes,\r | |
87 | IN VOID *Buffer\r | |
88 | )\r | |
d7dec593 | 89 | {\r |
90 | EFI_STATUS Status;\r | |
91 | EFI_FTW_LITE_DEVICE *FtwLiteDevice;\r | |
92 | EFI_FTW_LITE_RECORD *Record;\r | |
93 | EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb;\r | |
94 | EFI_PHYSICAL_ADDRESS FvbPhysicalAddress;\r | |
95 | UINTN MyLength;\r | |
96 | UINTN MyOffset;\r | |
97 | UINTN MyBufferSize;\r | |
98 | UINT8 *MyBuffer;\r | |
99 | UINTN SpareBufferSize;\r | |
100 | UINT8 *SpareBuffer;\r | |
101 | UINTN Index;\r | |
102 | UINT8 *Ptr;\r | |
103 | EFI_DEV_PATH_PTR DevPtr;\r | |
d7dec593 | 104 | //\r |
105 | // Refresh work space and get last record\r | |
106 | //\r | |
107 | FtwLiteDevice = FTW_LITE_CONTEXT_FROM_THIS (This);\r | |
108 | Status = WorkSpaceRefresh (FtwLiteDevice);\r | |
109 | if (EFI_ERROR (Status)) {\r | |
110 | return EFI_ABORTED;\r | |
111 | }\r | |
112 | \r | |
113 | Record = FtwLiteDevice->FtwLastRecord;\r | |
114 | \r | |
115 | //\r | |
116 | // Check the flags of last write record\r | |
117 | //\r | |
118 | if ((Record->WriteAllocated == FTW_VALID_STATE) || (Record->SpareCompleted == FTW_VALID_STATE)) {\r | |
119 | return EFI_ACCESS_DENIED;\r | |
120 | }\r | |
121 | //\r | |
122 | // IF former record has completed, THEN use next record\r | |
123 | //\r | |
124 | if (Record->WriteCompleted == FTW_VALID_STATE) {\r | |
125 | Record++;\r | |
126 | FtwLiteDevice->FtwLastRecord = Record;\r | |
127 | }\r | |
128 | \r | |
129 | MyOffset = (UINT8 *) Record - FtwLiteDevice->FtwWorkSpace;\r | |
130 | \r | |
131 | //\r | |
132 | // Check if the input data can fit within the target block\r | |
133 | //\r | |
134 | if ((Offset +*NumBytes) > FtwLiteDevice->SpareAreaLength) {\r | |
276a49b6 | 135 | *NumBytes = FtwLiteDevice->SpareAreaLength - Offset;\r |
d7dec593 | 136 | return EFI_BAD_BUFFER_SIZE;\r |
137 | }\r | |
138 | //\r | |
139 | // Check if there is enough free space for allocate a record\r | |
140 | //\r | |
5944a83b | 141 | if ((MyOffset + FTW_LITE_RECORD_SIZE) > FtwLiteDevice->FtwWorkSpaceSize) {\r |
e11ae3a5 | 142 | Status = FtwReclaimWorkSpace (FtwLiteDevice, TRUE);\r |
d7dec593 | 143 | if (EFI_ERROR (Status)) {\r |
144 | DEBUG ((EFI_D_ERROR, "FtwLite: Reclaim work space - %r", Status));\r | |
145 | return EFI_ABORTED;\r | |
146 | }\r | |
147 | }\r | |
148 | //\r | |
149 | // Get the FVB protocol by handle\r | |
150 | //\r | |
151 | Status = FtwGetFvbByHandle (FvbHandle, &Fvb);\r | |
152 | if (EFI_ERROR (Status)) {\r | |
153 | return EFI_NOT_FOUND;\r | |
154 | }\r | |
155 | //\r | |
156 | // Allocate a write record in workspace.\r | |
157 | // Update Header->WriteAllocated as VALID\r | |
158 | //\r | |
159 | Status = FtwUpdateFvState (\r | |
160 | FtwLiteDevice->FtwFvBlock,\r | |
161 | FtwLiteDevice->FtwWorkSpaceLba,\r | |
162 | FtwLiteDevice->FtwWorkSpaceBase + MyOffset,\r | |
163 | WRITE_ALLOCATED\r | |
164 | );\r | |
165 | \r | |
166 | if (EFI_ERROR (Status)) {\r | |
276a49b6 | 167 | DEBUG ((EFI_D_ERROR, "FtwLite: Allocate record - %r\n", Status));\r |
d7dec593 | 168 | return EFI_ABORTED;\r |
169 | }\r | |
170 | \r | |
171 | Record->WriteAllocated = FTW_VALID_STATE;\r | |
172 | \r | |
173 | //\r | |
174 | // Prepare data of write record, filling DevPath with memory mapped address.\r | |
175 | //\r | |
176 | DevPtr.MemMap = (MEMMAP_DEVICE_PATH *) &Record->DevPath;\r | |
177 | DevPtr.MemMap->Header.Type = HARDWARE_DEVICE_PATH;\r | |
178 | DevPtr.MemMap->Header.SubType = HW_MEMMAP_DP;\r | |
179 | SetDevicePathNodeLength (&DevPtr.MemMap->Header, sizeof (MEMMAP_DEVICE_PATH));\r | |
180 | \r | |
181 | Status = Fvb->GetPhysicalAddress (Fvb, &FvbPhysicalAddress);\r | |
182 | if (EFI_ERROR (Status)) {\r | |
276a49b6 | 183 | DEBUG ((EFI_D_ERROR, "FtwLite: Get FVB physical address - %r\n", Status));\r |
d7dec593 | 184 | return EFI_ABORTED;\r |
185 | }\r | |
186 | \r | |
187 | DevPtr.MemMap->MemoryType = EfiMemoryMappedIO;\r | |
188 | DevPtr.MemMap->StartingAddress = FvbPhysicalAddress;\r | |
189 | DevPtr.MemMap->EndingAddress = FvbPhysicalAddress +*NumBytes;\r | |
190 | //\r | |
191 | // ignored!\r | |
192 | //\r | |
193 | Record->Lba = Lba;\r | |
194 | Record->Offset = Offset;\r | |
195 | Record->NumBytes = *NumBytes;\r | |
196 | \r | |
197 | //\r | |
198 | // Write the record to the work space.\r | |
199 | //\r | |
200 | MyOffset = (UINT8 *) Record - FtwLiteDevice->FtwWorkSpace;\r | |
201 | MyLength = FTW_LITE_RECORD_SIZE;\r | |
202 | \r | |
203 | Status = FtwLiteDevice->FtwFvBlock->Write (\r | |
204 | FtwLiteDevice->FtwFvBlock,\r | |
205 | FtwLiteDevice->FtwWorkSpaceLba,\r | |
206 | FtwLiteDevice->FtwWorkSpaceBase + MyOffset,\r | |
207 | &MyLength,\r | |
208 | (UINT8 *) Record\r | |
209 | );\r | |
210 | if (EFI_ERROR (Status)) {\r | |
211 | return EFI_ABORTED;\r | |
212 | }\r | |
213 | //\r | |
214 | // Record has been written to working block, then write data.\r | |
215 | //\r | |
216 | //\r | |
217 | // Allocate a memory buffer\r | |
218 | //\r | |
219 | MyBufferSize = FtwLiteDevice->SpareAreaLength;\r | |
220 | MyBuffer = AllocatePool (MyBufferSize);\r | |
221 | if (MyBuffer == NULL) {\r | |
222 | return EFI_OUT_OF_RESOURCES;\r | |
223 | }\r | |
224 | //\r | |
225 | // Starting at Lba, if the number of the rest blocks on Fvb is less\r | |
226 | // than NumberOfSpareBlock.\r | |
227 | //\r | |
228 | //\r | |
229 | // Read all original data from target block to memory buffer\r | |
230 | //\r | |
231 | if (IsInWorkingBlock (FtwLiteDevice, Fvb, Lba)) {\r | |
232 | //\r | |
233 | // If target block falls into working block, we must follow the process of\r | |
234 | // updating working block.\r | |
235 | //\r | |
236 | Ptr = MyBuffer;\r | |
237 | for (Index = 0; Index < FtwLiteDevice->NumberOfSpareBlock; Index += 1) {\r | |
276a49b6 | 238 | MyLength = FtwLiteDevice->BlockSize;\r |
d7dec593 | 239 | Status = FtwLiteDevice->FtwFvBlock->Read (\r |
240 | FtwLiteDevice->FtwFvBlock,\r | |
241 | FtwLiteDevice->FtwWorkBlockLba + Index,\r | |
242 | 0,\r | |
243 | &MyLength,\r | |
244 | Ptr\r | |
245 | );\r | |
246 | if (EFI_ERROR (Status)) {\r | |
247 | FreePool (MyBuffer);\r | |
248 | return EFI_ABORTED;\r | |
249 | }\r | |
250 | \r | |
251 | Ptr += MyLength;\r | |
252 | }\r | |
253 | //\r | |
254 | // Update Offset by adding the offset from the start LBA of working block to\r | |
255 | // the target LBA. The target block can not span working block!\r | |
256 | //\r | |
276a49b6 | 257 | Offset = (((UINTN) (Lba - FtwLiteDevice->FtwWorkBlockLba)) * FtwLiteDevice->BlockSize + Offset);\r |
d7dec593 | 258 | ASSERT ((Offset +*NumBytes) <= FtwLiteDevice->SpareAreaLength);\r |
259 | \r | |
260 | } else {\r | |
261 | \r | |
262 | Ptr = MyBuffer;\r | |
263 | for (Index = 0; Index < FtwLiteDevice->NumberOfSpareBlock; Index += 1) {\r | |
276a49b6 | 264 | MyLength = FtwLiteDevice->BlockSize;\r |
d7dec593 | 265 | Status = Fvb->Read (Fvb, Lba + Index, 0, &MyLength, Ptr);\r |
266 | if (EFI_ERROR (Status)) {\r | |
267 | FreePool (MyBuffer);\r | |
268 | return EFI_ABORTED;\r | |
269 | }\r | |
270 | \r | |
271 | Ptr += MyLength;\r | |
272 | }\r | |
273 | }\r | |
274 | //\r | |
275 | // Overwrite the updating range data with\r | |
276 | // the input buffer content\r | |
277 | //\r | |
278 | CopyMem (MyBuffer + Offset, Buffer, *NumBytes);\r | |
279 | \r | |
280 | //\r | |
281 | // Try to keep the content of spare block\r | |
282 | // Save spare block into a spare backup memory buffer (Sparebuffer)\r | |
283 | //\r | |
284 | SpareBufferSize = FtwLiteDevice->SpareAreaLength;\r | |
285 | SpareBuffer = AllocatePool (SpareBufferSize);\r | |
286 | if (SpareBuffer == NULL) {\r | |
287 | FreePool (MyBuffer);\r | |
288 | return EFI_OUT_OF_RESOURCES;\r | |
289 | }\r | |
290 | \r | |
291 | Ptr = SpareBuffer;\r | |
292 | for (Index = 0; Index < FtwLiteDevice->NumberOfSpareBlock; Index += 1) {\r | |
276a49b6 | 293 | MyLength = FtwLiteDevice->BlockSize;\r |
d7dec593 | 294 | Status = FtwLiteDevice->FtwBackupFvb->Read (\r |
295 | FtwLiteDevice->FtwBackupFvb,\r | |
296 | FtwLiteDevice->FtwSpareLba + Index,\r | |
297 | 0,\r | |
298 | &MyLength,\r | |
299 | Ptr\r | |
300 | );\r | |
301 | if (EFI_ERROR (Status)) {\r | |
302 | FreePool (MyBuffer);\r | |
303 | FreePool (SpareBuffer);\r | |
304 | return EFI_ABORTED;\r | |
305 | }\r | |
306 | \r | |
307 | Ptr += MyLength;\r | |
308 | }\r | |
309 | //\r | |
310 | // Write the memory buffer to spare block\r | |
311 | // Don't forget to erase Flash first.\r | |
312 | //\r | |
313 | Status = FtwEraseSpareBlock (FtwLiteDevice);\r | |
314 | Ptr = MyBuffer;\r | |
315 | for (Index = 0; Index < FtwLiteDevice->NumberOfSpareBlock; Index += 1) {\r | |
276a49b6 | 316 | MyLength = FtwLiteDevice->BlockSize;\r |
d7dec593 | 317 | Status = FtwLiteDevice->FtwBackupFvb->Write (\r |
318 | FtwLiteDevice->FtwBackupFvb,\r | |
319 | FtwLiteDevice->FtwSpareLba + Index,\r | |
320 | 0,\r | |
321 | &MyLength,\r | |
322 | Ptr\r | |
323 | );\r | |
324 | if (EFI_ERROR (Status)) {\r | |
325 | FreePool (MyBuffer);\r | |
326 | FreePool (SpareBuffer);\r | |
327 | return EFI_ABORTED;\r | |
328 | }\r | |
329 | \r | |
330 | Ptr += MyLength;\r | |
331 | }\r | |
332 | //\r | |
333 | // Free MyBuffer\r | |
334 | //\r | |
335 | FreePool (MyBuffer);\r | |
336 | \r | |
337 | //\r | |
5944a83b | 338 | // Set the SpareComplete in the FTW record,\r |
d7dec593 | 339 | //\r |
340 | MyOffset = (UINT8 *) Record - FtwLiteDevice->FtwWorkSpace;\r | |
341 | Status = FtwUpdateFvState (\r | |
342 | FtwLiteDevice->FtwFvBlock,\r | |
343 | FtwLiteDevice->FtwWorkSpaceLba,\r | |
344 | FtwLiteDevice->FtwWorkSpaceBase + MyOffset,\r | |
345 | SPARE_COMPLETED\r | |
346 | );\r | |
347 | if (EFI_ERROR (Status)) {\r | |
348 | FreePool (SpareBuffer);\r | |
349 | return EFI_ABORTED;\r | |
350 | }\r | |
351 | \r | |
352 | Record->SpareCompleted = FTW_VALID_STATE;\r | |
353 | \r | |
354 | //\r | |
355 | // Since the content has already backuped in spare block, the write is\r | |
356 | // guaranteed to be completed with fault tolerant manner.\r | |
357 | //\r | |
358 | Status = FtwWriteRecord (FtwLiteDevice, Fvb);\r | |
359 | if (EFI_ERROR (Status)) {\r | |
360 | FreePool (SpareBuffer);\r | |
361 | return EFI_ABORTED;\r | |
362 | }\r | |
363 | \r | |
364 | Record++;\r | |
365 | FtwLiteDevice->FtwLastRecord = Record;\r | |
366 | \r | |
367 | //\r | |
368 | // Restore spare backup buffer into spare block , if no failure happened during FtwWrite.\r | |
369 | //\r | |
370 | Status = FtwEraseSpareBlock (FtwLiteDevice);\r | |
371 | Ptr = SpareBuffer;\r | |
372 | for (Index = 0; Index < FtwLiteDevice->NumberOfSpareBlock; Index += 1) {\r | |
276a49b6 | 373 | MyLength = FtwLiteDevice->BlockSize;\r |
d7dec593 | 374 | Status = FtwLiteDevice->FtwBackupFvb->Write (\r |
375 | FtwLiteDevice->FtwBackupFvb,\r | |
376 | FtwLiteDevice->FtwSpareLba + Index,\r | |
377 | 0,\r | |
378 | &MyLength,\r | |
379 | Ptr\r | |
380 | );\r | |
381 | if (EFI_ERROR (Status)) {\r | |
382 | FreePool (SpareBuffer);\r | |
383 | return EFI_ABORTED;\r | |
384 | }\r | |
385 | \r | |
386 | Ptr += MyLength;\r | |
387 | }\r | |
388 | //\r | |
389 | // All success.\r | |
390 | //\r | |
391 | FreePool (SpareBuffer);\r | |
392 | \r | |
393 | DEBUG (\r | |
276a49b6 | 394 | (EFI_D_ERROR,\r |
d7dec593 | 395 | "FtwLite: Write() success, (Lba:Offset)=(%lx:0x%x), NumBytes: 0x%x\n",\r |
396 | Lba,\r | |
397 | Offset,\r | |
398 | *NumBytes)\r | |
399 | );\r | |
400 | \r | |
401 | return EFI_SUCCESS;\r | |
402 | }\r | |
403 | \r | |
404 | \r | |
6aab8214 | 405 | /**\r |
da770255 | 406 | Write a record with fault tolerant manner.\r |
6aab8214 | 407 | Since the content has already backuped in spare block, the write is\r |
408 | guaranteed to be completed with fault tolerant manner.\r | |
409 | \r | |
410 | \r | |
411 | @param FtwLiteDevice The private data of FTW_LITE driver\r | |
412 | @param Fvb The FVB protocol that provides services for\r | |
413 | reading, writing, and erasing the target block.\r | |
414 | \r | |
415 | @retval EFI_SUCCESS The function completed successfully\r | |
416 | @retval EFI_ABORTED The function could not complete successfully\r | |
417 | \r | |
418 | **/\r | |
d7dec593 | 419 | EFI_STATUS\r |
420 | FtwWriteRecord (\r | |
421 | IN EFI_FTW_LITE_DEVICE *FtwLiteDevice,\r | |
422 | IN EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb\r | |
423 | )\r | |
d7dec593 | 424 | {\r |
425 | EFI_STATUS Status;\r | |
426 | EFI_FTW_LITE_RECORD *Record;\r | |
427 | EFI_LBA WorkSpaceLbaOffset; \r | |
428 | UINTN Offset;\r | |
429 | \r | |
430 | //\r | |
431 | // Spare Complete but Destination not complete,\r | |
432 | // Recover the targt block with the spare block.\r | |
433 | //\r | |
434 | Record = FtwLiteDevice->FtwLastRecord;\r | |
435 | \r | |
436 | //\r | |
437 | // IF target block is working block, THEN Flush Spare Block To Working Block;\r | |
d7dec593 | 438 | // ELSE flush spare block to normal target block.ENDIF\r |
439 | //\r | |
440 | if (IsInWorkingBlock (FtwLiteDevice, Fvb, Record->Lba)) {\r | |
441 | //\r | |
442 | // If target block is working block, Attention:\r | |
443 | // it's required to set SPARE_COMPLETED to spare block.\r | |
444 | //\r | |
445 | WorkSpaceLbaOffset = FtwLiteDevice->FtwWorkSpaceLba - FtwLiteDevice->FtwWorkBlockLba;\r | |
446 | Offset = (UINT8 *) Record - FtwLiteDevice->FtwWorkSpace;\r | |
447 | Status = FtwUpdateFvState (\r | |
448 | FtwLiteDevice->FtwBackupFvb,\r | |
449 | FtwLiteDevice->FtwSpareLba + WorkSpaceLbaOffset,\r | |
450 | FtwLiteDevice->FtwWorkSpaceBase + Offset,\r | |
451 | SPARE_COMPLETED\r | |
452 | );\r | |
453 | ASSERT_EFI_ERROR (Status);\r | |
454 | \r | |
455 | Status = FlushSpareBlockToWorkingBlock (FtwLiteDevice);\r | |
d7dec593 | 456 | } else {\r |
457 | //\r | |
8986b8cd | 458 | // Update blocks other than working block\r |
d7dec593 | 459 | //\r |
460 | Status = FlushSpareBlockToTargetBlock (FtwLiteDevice, Fvb, Record->Lba);\r | |
461 | }\r | |
462 | \r | |
463 | ASSERT_EFI_ERROR (Status);\r | |
464 | \r | |
465 | //\r | |
466 | // Set WriteCompleted flag in record\r | |
467 | //\r | |
468 | Offset = (UINT8 *) Record - FtwLiteDevice->FtwWorkSpace;\r | |
469 | Status = FtwUpdateFvState (\r | |
470 | FtwLiteDevice->FtwFvBlock,\r | |
471 | FtwLiteDevice->FtwWorkSpaceLba,\r | |
472 | FtwLiteDevice->FtwWorkSpaceBase + Offset,\r | |
473 | WRITE_COMPLETED\r | |
474 | );\r | |
475 | ASSERT_EFI_ERROR (Status);\r | |
476 | \r | |
477 | Record->WriteCompleted = FTW_VALID_STATE;\r | |
478 | return EFI_SUCCESS;\r | |
479 | }\r | |
480 | \r | |
481 | \r | |
6aab8214 | 482 | /**\r |
483 | Restarts a previously interrupted write. The caller must provide the\r | |
484 | block protocol needed to complete the interrupted write.\r | |
485 | \r | |
486 | \r | |
487 | @param FtwLiteDevice The private data of FTW_LITE driver\r | |
488 | FvbHandle - The handle of FVB protocol that provides services for\r | |
489 | reading, writing, and erasing the target block.\r | |
490 | \r | |
491 | @retval EFI_SUCCESS The function completed successfully\r | |
492 | @retval EFI_ACCESS_DENIED No pending writes exist\r | |
493 | @retval EFI_NOT_FOUND FVB protocol not found by the handle\r | |
494 | @retval EFI_ABORTED The function could not complete successfully\r | |
495 | \r | |
496 | **/\r | |
d7dec593 | 497 | EFI_STATUS\r |
498 | FtwRestart (\r | |
499 | IN EFI_FTW_LITE_DEVICE *FtwLiteDevice\r | |
500 | )\r | |
d7dec593 | 501 | {\r |
502 | EFI_STATUS Status;\r | |
503 | EFI_FTW_LITE_RECORD *Record;\r | |
504 | EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb;\r | |
505 | EFI_DEV_PATH_PTR DevPathPtr;\r | |
506 | \r | |
507 | //\r | |
508 | // Spare Completed but Destination not complete,\r | |
509 | // Recover the targt block with the spare block.\r | |
510 | //\r | |
511 | Record = FtwLiteDevice->FtwLastRecord;\r | |
512 | \r | |
513 | //\r | |
514 | // Only support memory mapped FVB device path by now.\r | |
515 | //\r | |
516 | DevPathPtr.MemMap = (MEMMAP_DEVICE_PATH *) &Record->DevPath;\r | |
517 | if (!((DevPathPtr.MemMap->Header.Type == HARDWARE_DEVICE_PATH) && (DevPathPtr.MemMap->Header.SubType == HW_MEMMAP_DP))\r | |
518 | ) {\r | |
276a49b6 | 519 | DEBUG ((EFI_D_ERROR, "FtwLite: FVB Device Path is not memory mapped\n"));\r |
d7dec593 | 520 | return EFI_ABORTED;\r |
521 | }\r | |
522 | \r | |
523 | Status = GetFvbByAddress (DevPathPtr.MemMap->StartingAddress, &Fvb);\r | |
524 | if (EFI_ERROR (Status)) {\r | |
525 | return EFI_NOT_FOUND;\r | |
526 | }\r | |
527 | //\r | |
528 | // Since the content has already backuped in spare block, the write is\r | |
529 | // guaranteed to be completed with fault tolerant manner.\r | |
530 | //\r | |
531 | Status = FtwWriteRecord (FtwLiteDevice, Fvb);\r | |
276a49b6 | 532 | DEBUG ((EFI_D_INFO, "FtwLite: Restart() - %r\n", Status));\r |
d7dec593 | 533 | \r |
534 | Record++;\r | |
535 | FtwLiteDevice->FtwLastRecord = Record;\r | |
536 | \r | |
537 | //\r | |
538 | // Erase Spare block\r | |
539 | // This is restart, no need to keep spareblock content.\r | |
540 | //\r | |
541 | FtwEraseSpareBlock (FtwLiteDevice);\r | |
542 | \r | |
543 | return Status;\r | |
544 | }\r | |
545 | \r | |
546 | \r | |
6aab8214 | 547 | /**\r |
548 | Aborts all previous allocated writes.\r | |
d7dec593 | 549 | \r |
d7dec593 | 550 | \r |
6aab8214 | 551 | @param FtwLiteDevice The private data of FTW_LITE driver\r |
d7dec593 | 552 | \r |
6aab8214 | 553 | @retval EFI_SUCCESS The function completed successfully\r |
554 | @retval EFI_ABORTED The function could not complete successfully.\r | |
555 | @retval EFI_NOT_FOUND No allocated writes exist.\r | |
d7dec593 | 556 | \r |
6aab8214 | 557 | **/\r |
558 | EFI_STATUS\r | |
559 | FtwAbort (\r | |
560 | IN EFI_FTW_LITE_DEVICE *FtwLiteDevice\r | |
561 | )\r | |
d7dec593 | 562 | {\r |
563 | EFI_STATUS Status;\r | |
564 | UINTN Offset;\r | |
565 | \r | |
566 | if (FtwLiteDevice->FtwLastRecord->WriteCompleted == FTW_VALID_STATE) {\r | |
567 | return EFI_NOT_FOUND;\r | |
568 | }\r | |
569 | //\r | |
570 | // Update the complete state of the header as VALID and abort.\r | |
571 | //\r | |
572 | Offset = (UINT8 *) FtwLiteDevice->FtwLastRecord - FtwLiteDevice->FtwWorkSpace;\r | |
573 | Status = FtwUpdateFvState (\r | |
574 | FtwLiteDevice->FtwFvBlock,\r | |
575 | FtwLiteDevice->FtwWorkSpaceLba,\r | |
576 | FtwLiteDevice->FtwWorkSpaceBase + Offset,\r | |
577 | WRITE_COMPLETED\r | |
578 | );\r | |
579 | if (EFI_ERROR (Status)) {\r | |
580 | return EFI_ABORTED;\r | |
581 | }\r | |
582 | \r | |
583 | FtwLiteDevice->FtwLastRecord->WriteCompleted = FTW_VALID_STATE;\r | |
584 | \r | |
585 | Status = FtwGetLastRecord (FtwLiteDevice, &FtwLiteDevice->FtwLastRecord);\r | |
586 | \r | |
587 | //\r | |
588 | // Erase the spare block\r | |
589 | //\r | |
590 | Status = FtwEraseSpareBlock (FtwLiteDevice);\r | |
591 | \r | |
276a49b6 | 592 | DEBUG ((EFI_D_INFO, "FtwLite: Abort() success \n"));\r |
d7dec593 | 593 | return EFI_SUCCESS;\r |
594 | }\r | |
595 | \r | |
6aab8214 | 596 | /**\r |
597 | This function is the entry point of the Fault Tolerant Write driver.\r | |
598 | \r | |
da770255 | 599 | @param ImageHandle A handle for the image that is initializing this driver\r |
600 | @param SystemTable A pointer to the EFI system table\r | |
6aab8214 | 601 | \r |
602 | @retval EFI_SUCCESS FTW has finished the initialization\r | |
603 | @retval EFI_ABORTED FTW initialization error\r | |
604 | \r | |
605 | **/\r | |
d7dec593 | 606 | EFI_STATUS\r |
607 | EFIAPI\r | |
608 | InitializeFtwLite (\r | |
609 | IN EFI_HANDLE ImageHandle,\r | |
610 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
611 | )\r | |
d7dec593 | 612 | {\r |
613 | EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb;\r | |
614 | UINTN Index;\r | |
615 | EFI_HANDLE *HandleBuffer;\r | |
616 | UINTN HandleCount;\r | |
617 | EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;\r | |
618 | EFI_PHYSICAL_ADDRESS BaseAddress;\r | |
619 | EFI_FTW_LITE_DEVICE *FtwLiteDevice;\r | |
620 | EFI_FTW_LITE_RECORD *Record;\r | |
d7dec593 | 621 | EFI_STATUS Status;\r |
622 | UINTN Offset;\r | |
276a49b6 | 623 | UINTN Length;\r |
d7dec593 | 624 | EFI_FV_BLOCK_MAP_ENTRY *FvbMapEntry;\r |
625 | UINT32 LbaIndex;\r | |
d7dec593 | 626 | //\r |
da770255 | 627 | // Allocate Private data of this driver, including the FtwWorkSpace[FTW_WORK_SPACE_SIZE].\r |
d7dec593 | 628 | //\r |
629 | FtwLiteDevice = NULL;\r | |
276a49b6 | 630 | FtwLiteDevice = AllocatePool (sizeof (EFI_FTW_LITE_DEVICE) + PcdGet32 (PcdFlashNvStorageFtwWorkingSize));\r |
77980854 | 631 | ASSERT (FtwLiteDevice != NULL);\r |
d7dec593 | 632 | \r |
633 | ZeroMem (FtwLiteDevice, sizeof (EFI_FTW_LITE_DEVICE));\r | |
634 | FtwLiteDevice->Signature = FTW_LITE_DEVICE_SIGNATURE;\r | |
635 | \r | |
636 | //\r | |
637 | // Initialize other parameters, and set WorkSpace as FTW_ERASED_BYTE.\r | |
638 | //\r | |
639 | FtwLiteDevice->FtwWorkSpace = (UINT8 *) (FtwLiteDevice + 1);\r | |
d7dec593 | 640 | FtwLiteDevice->FtwWorkSpaceHeader = (EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER *) FtwLiteDevice->FtwWorkSpace;\r |
d7dec593 | 641 | FtwLiteDevice->FtwLastRecord = NULL;\r |
642 | \r | |
276be2de | 643 | FtwLiteDevice->WorkSpaceAddress = (EFI_PHYSICAL_ADDRESS) PcdGet32 (PcdFlashNvStorageFtwWorkingBase);\r |
644 | FtwLiteDevice->WorkSpaceLength = (UINTN) PcdGet32 (PcdFlashNvStorageFtwWorkingSize);\r | |
645 | \r | |
646 | FtwLiteDevice->SpareAreaAddress = (EFI_PHYSICAL_ADDRESS) PcdGet32 (PcdFlashNvStorageFtwSpareBase);\r | |
647 | FtwLiteDevice->SpareAreaLength = (UINTN) PcdGet32 (PcdFlashNvStorageFtwSpareSize);\r | |
d7dec593 | 648 | \r |
649 | ASSERT ((FtwLiteDevice->WorkSpaceLength != 0) && (FtwLiteDevice->SpareAreaLength != 0));\r | |
650 | \r | |
651 | //\r | |
652 | // Locate FVB protocol\r | |
653 | //\r | |
654 | Status = gBS->LocateHandleBuffer (\r | |
655 | ByProtocol,\r | |
656 | &gEfiFirmwareVolumeBlockProtocolGuid,\r | |
657 | NULL,\r | |
658 | &HandleCount,\r | |
659 | &HandleBuffer\r | |
660 | );\r | |
661 | ASSERT_EFI_ERROR (Status);\r | |
662 | \r | |
663 | ASSERT (HandleCount > 0);\r | |
664 | \r | |
665 | FtwLiteDevice->FtwFvBlock = NULL;\r | |
666 | FtwLiteDevice->FtwBackupFvb = NULL;\r | |
667 | FtwLiteDevice->FtwWorkSpaceLba = (EFI_LBA) (-1);\r | |
668 | FtwLiteDevice->FtwSpareLba = (EFI_LBA) (-1);\r | |
669 | for (Index = 0; Index < HandleCount; Index += 1) {\r | |
670 | Status = gBS->HandleProtocol (\r | |
671 | HandleBuffer[Index],\r | |
672 | &gEfiFirmwareVolumeBlockProtocolGuid,\r | |
673 | (VOID **) &Fvb\r | |
674 | );\r | |
675 | ASSERT_EFI_ERROR (Status);\r | |
676 | \r | |
677 | Status = Fvb->GetPhysicalAddress (Fvb, &BaseAddress);\r | |
678 | if (EFI_ERROR (Status)) {\r | |
679 | continue;\r | |
680 | }\r | |
681 | \r | |
682 | FwVolHeader = (EFI_FIRMWARE_VOLUME_HEADER *) ((UINTN) BaseAddress);\r | |
683 | \r | |
684 | if ((FtwLiteDevice->WorkSpaceAddress >= BaseAddress) &&\r | |
276a49b6 | 685 | ((FtwLiteDevice->WorkSpaceAddress + FtwLiteDevice->WorkSpaceLength) <= (BaseAddress + FwVolHeader->FvLength))\r |
d7dec593 | 686 | ) {\r |
687 | FtwLiteDevice->FtwFvBlock = Fvb;\r | |
688 | //\r | |
689 | // To get the LBA of work space\r | |
690 | //\r | |
691 | if ((FwVolHeader->FvLength) > (FwVolHeader->HeaderLength)) {\r | |
692 | //\r | |
693 | // FV may have multiple types of BlockLength\r | |
694 | //\r | |
695 | FvbMapEntry = &FwVolHeader->BlockMap[0];\r | |
696 | while (!((FvbMapEntry->NumBlocks == 0) && (FvbMapEntry->Length == 0))) {\r | |
697 | for (LbaIndex = 1; LbaIndex <= FvbMapEntry->NumBlocks; LbaIndex += 1) {\r | |
5944a83b LG |
698 | if ((FtwLiteDevice->WorkSpaceAddress >= (BaseAddress + FvbMapEntry->Length * (LbaIndex - 1)))\r |
699 | && (FtwLiteDevice->WorkSpaceAddress < (BaseAddress + FvbMapEntry->Length * LbaIndex))) {\r | |
d7dec593 | 700 | FtwLiteDevice->FtwWorkSpaceLba = LbaIndex - 1;\r |
701 | //\r | |
702 | // Get the Work space size and Base(Offset)\r | |
703 | //\r | |
704 | FtwLiteDevice->FtwWorkSpaceSize = FtwLiteDevice->WorkSpaceLength;\r | |
705 | FtwLiteDevice->FtwWorkSpaceBase = (UINTN) (FtwLiteDevice->WorkSpaceAddress - (BaseAddress + FvbMapEntry->Length * (LbaIndex - 1)));\r | |
706 | break;\r | |
707 | }\r | |
708 | }\r | |
709 | //\r | |
710 | // end for\r | |
711 | //\r | |
5944a83b LG |
712 | if (LbaIndex <= FvbMapEntry->NumBlocks) {\r |
713 | //\r | |
714 | // Work space range is found.\r | |
715 | //\r | |
716 | break;\r | |
717 | }\r | |
d7dec593 | 718 | FvbMapEntry++;\r |
719 | }\r | |
720 | //\r | |
721 | // end while\r | |
722 | //\r | |
723 | }\r | |
724 | }\r | |
725 | \r | |
726 | if ((FtwLiteDevice->SpareAreaAddress >= BaseAddress) &&\r | |
276a49b6 | 727 | ((FtwLiteDevice->SpareAreaAddress + FtwLiteDevice->SpareAreaLength) <= (BaseAddress + FwVolHeader->FvLength))\r |
d7dec593 | 728 | ) {\r |
729 | FtwLiteDevice->FtwBackupFvb = Fvb;\r | |
730 | //\r | |
731 | // To get the LBA of spare\r | |
732 | //\r | |
733 | if ((FwVolHeader->FvLength) > (FwVolHeader->HeaderLength)) {\r | |
734 | //\r | |
735 | // FV may have multiple types of BlockLength\r | |
736 | //\r | |
737 | FvbMapEntry = &FwVolHeader->BlockMap[0];\r | |
738 | while (!((FvbMapEntry->NumBlocks == 0) && (FvbMapEntry->Length == 0))) {\r | |
739 | for (LbaIndex = 1; LbaIndex <= FvbMapEntry->NumBlocks; LbaIndex += 1) {\r | |
5944a83b LG |
740 | if ((FtwLiteDevice->SpareAreaAddress >= (BaseAddress + FvbMapEntry->Length * (LbaIndex - 1)))\r |
741 | && (FtwLiteDevice->SpareAreaAddress < (BaseAddress + FvbMapEntry->Length * LbaIndex))) {\r | |
d7dec593 | 742 | //\r |
276a49b6 | 743 | // Get the NumberOfSpareBlock and BlockSize\r |
d7dec593 | 744 | //\r |
745 | FtwLiteDevice->FtwSpareLba = LbaIndex - 1;\r | |
276a49b6 LG |
746 | FtwLiteDevice->BlockSize = FvbMapEntry->Length;\r |
747 | FtwLiteDevice->NumberOfSpareBlock = FtwLiteDevice->SpareAreaLength / FtwLiteDevice->BlockSize;\r | |
d7dec593 | 748 | //\r |
749 | // Check the range of spare area to make sure that it's in FV range\r | |
276a49b6 | 750 | // To do delete\r |
d7dec593 | 751 | //\r |
752 | ASSERT ((FtwLiteDevice->FtwSpareLba + FtwLiteDevice->NumberOfSpareBlock) <= FvbMapEntry->NumBlocks);\r | |
753 | break;\r | |
754 | }\r | |
755 | }\r | |
5944a83b LG |
756 | if (LbaIndex <= FvbMapEntry->NumBlocks) {\r |
757 | //\r | |
758 | // Spare FV range is found.\r | |
759 | //\r | |
760 | break;\r | |
761 | }\r | |
d7dec593 | 762 | FvbMapEntry++;\r |
763 | }\r | |
764 | //\r | |
765 | // end while\r | |
766 | //\r | |
767 | }\r | |
768 | }\r | |
769 | }\r | |
276a49b6 | 770 | \r |
d7dec593 | 771 | //\r |
772 | // Calculate the start LBA of working block. Working block is an area which\r | |
773 | // contains working space in its last block and has the same size as spare\r | |
774 | // block, unless there are not enough blocks before the block that contains\r | |
775 | // working space.\r | |
776 | //\r | |
777 | FtwLiteDevice->FtwWorkBlockLba = FtwLiteDevice->FtwWorkSpaceLba - FtwLiteDevice->NumberOfSpareBlock + 1;\r | |
778 | if ((INT64) (FtwLiteDevice->FtwWorkBlockLba) < 0) {\r | |
276a49b6 LG |
779 | DEBUG ((EFI_D_ERROR, "FtwLite: The spare block range is too large than the working block range!\n"));\r |
780 | FreePool (FtwLiteDevice);\r | |
781 | return EFI_ABORTED;\r | |
d7dec593 | 782 | }\r |
783 | \r | |
784 | if ((FtwLiteDevice->FtwFvBlock == NULL) ||\r | |
785 | (FtwLiteDevice->FtwBackupFvb == NULL) ||\r | |
786 | (FtwLiteDevice->FtwWorkSpaceLba == (EFI_LBA) (-1)) ||\r | |
787 | (FtwLiteDevice->FtwSpareLba == (EFI_LBA) (-1))\r | |
788 | ) {\r | |
789 | DEBUG ((EFI_D_ERROR, "FtwLite: Working or spare FVB not ready\n"));\r | |
77980854 LG |
790 | FreePool (FtwLiteDevice);\r |
791 | return EFI_ABORTED;\r | |
d7dec593 | 792 | }\r |
276a49b6 | 793 | \r |
d7dec593 | 794 | //\r |
795 | // Refresh workspace data from working block\r | |
796 | //\r | |
797 | Status = WorkSpaceRefresh (FtwLiteDevice);\r | |
798 | ASSERT_EFI_ERROR (Status);\r | |
799 | \r | |
800 | //\r | |
801 | // If the working block workspace is not valid, try the spare block\r | |
802 | //\r | |
803 | if (!IsValidWorkSpace (FtwLiteDevice->FtwWorkSpaceHeader)) {\r | |
276a49b6 | 804 | DEBUG ((EFI_D_ERROR, "FtwLite: Workspace invalid, read from backup\n"));\r |
d7dec593 | 805 | //\r |
806 | // Read from spare block\r | |
807 | //\r | |
808 | Length = FtwLiteDevice->FtwWorkSpaceSize;\r | |
809 | Status = FtwLiteDevice->FtwBackupFvb->Read (\r | |
810 | FtwLiteDevice->FtwBackupFvb,\r | |
811 | FtwLiteDevice->FtwSpareLba,\r | |
812 | FtwLiteDevice->FtwWorkSpaceBase,\r | |
813 | &Length,\r | |
814 | FtwLiteDevice->FtwWorkSpace\r | |
815 | );\r | |
816 | ASSERT_EFI_ERROR (Status);\r | |
817 | \r | |
818 | //\r | |
819 | // If spare block is valid, then replace working block content.\r | |
820 | //\r | |
821 | if (IsValidWorkSpace (FtwLiteDevice->FtwWorkSpaceHeader)) {\r | |
822 | Status = FlushSpareBlockToWorkingBlock (FtwLiteDevice);\r | |
276a49b6 | 823 | DEBUG ((EFI_D_ERROR, "FtwLite: Restart working block in Init() - %r\n", Status));\r |
d7dec593 | 824 | ASSERT_EFI_ERROR (Status);\r |
825 | \r | |
826 | FtwAbort (FtwLiteDevice);\r | |
827 | //\r | |
828 | // Refresh work space.\r | |
829 | //\r | |
830 | Status = WorkSpaceRefresh (FtwLiteDevice);\r | |
831 | if (EFI_ERROR (Status)) {\r | |
77980854 | 832 | FreePool (FtwLiteDevice);\r |
d7dec593 | 833 | return EFI_ABORTED;\r |
834 | }\r | |
835 | } else {\r | |
276a49b6 | 836 | DEBUG ((EFI_D_ERROR, "FtwLite: Both are invalid, init workspace\n"));\r |
d7dec593 | 837 | //\r |
838 | // If both are invalid, then initialize work space.\r | |
839 | //\r | |
840 | SetMem (\r | |
841 | FtwLiteDevice->FtwWorkSpace,\r | |
842 | FtwLiteDevice->FtwWorkSpaceSize,\r | |
843 | FTW_ERASED_BYTE\r | |
844 | );\r | |
845 | InitWorkSpaceHeader (FtwLiteDevice->FtwWorkSpaceHeader);\r | |
846 | //\r | |
e11ae3a5 | 847 | // Initialize the work space\r |
d7dec593 | 848 | //\r |
e11ae3a5 LG |
849 | Status = FtwReclaimWorkSpace (FtwLiteDevice, FALSE);\r |
850 | \r | |
d7dec593 | 851 | if (EFI_ERROR (Status)) {\r |
77980854 | 852 | FreePool (FtwLiteDevice);\r |
d7dec593 | 853 | return EFI_ABORTED;\r |
854 | }\r | |
855 | }\r | |
856 | }\r | |
857 | //\r | |
858 | // Hook the protocol API\r | |
859 | //\r | |
860 | FtwLiteDevice->FtwLiteInstance.Write = FtwLiteWrite;\r | |
861 | \r | |
862 | //\r | |
863 | // Install protocol interface\r | |
864 | //\r | |
865 | Status = gBS->InstallProtocolInterface (\r | |
866 | &FtwLiteDevice->Handle,\r | |
867 | &gEfiFaultTolerantWriteLiteProtocolGuid,\r | |
868 | EFI_NATIVE_INTERFACE,\r | |
869 | &FtwLiteDevice->FtwLiteInstance\r | |
870 | );\r | |
871 | if (EFI_ERROR (Status)) {\r | |
77980854 | 872 | FreePool (FtwLiteDevice);\r |
d7dec593 | 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 | |
276a49b6 | 881 | DEBUG ((EFI_D_ERROR, "FtwLite: Init.. record not SpareCompleted, abort()\n"));\r |
d7dec593 | 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 | |
276a49b6 | 892 | DEBUG ((EFI_D_ERROR, "FtwLite: Restart last write - %r\n", Status));\r |
d7dec593 | 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 | |
276a49b6 | 912 | DEBUG ((EFI_D_ERROR, "FtwLite: Workspace is dirty, call reclaim...\n"));\r |
e11ae3a5 | 913 | Status = FtwReclaimWorkSpace (FtwLiteDevice, TRUE);\r |
d7dec593 | 914 | if (EFI_ERROR (Status)) {\r |
276a49b6 | 915 | DEBUG ((EFI_D_ERROR, "FtwLite: Workspace reclaim - %r\n", Status));\r |
77980854 | 916 | FreePool (FtwLiteDevice);\r |
d7dec593 | 917 | return EFI_ABORTED;\r |
918 | }\r | |
919 | }\r | |
920 | \r | |
921 | return EFI_SUCCESS;\r | |
922 | }\r |