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3f5ed3fa JY |
1 | /** @file\r |
2 | \r | |
e8097a74 | 3 | Copyright (c) 2017 - 2018, Intel Corporation. All rights reserved.<BR>\r |
3f5ed3fa JY |
4 | \r |
5 | This program and the accompanying materials are licensed and made available under\r | |
6 | the terms and conditions of the BSD License which accompanies this distribution.\r | |
7 | The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | **/\r | |
14 | \r | |
15 | #include <Uefi.h>\r | |
16 | #include <PiPei.h>\r | |
17 | #include <Library/BaseLib.h>\r | |
18 | #include <Library/BaseMemoryLib.h>\r | |
19 | #include <Library/MemoryAllocationLib.h>\r | |
20 | #include <Library/IoLib.h>\r | |
21 | #include <Library/DebugLib.h>\r | |
22 | #include <Library/PeiServicesLib.h>\r | |
23 | #include <Library/HobLib.h>\r | |
24 | #include <IndustryStandard/Vtd.h>\r | |
25 | #include <Ppi/IoMmu.h>\r | |
4084ccfa | 26 | #include <Ppi/VtdInfo.h>\r |
a1e7cd0b | 27 | #include <Ppi/MemoryDiscovered.h>\r |
fc8be1ad | 28 | #include <Ppi/EndOfPeiPhase.h>\r |
3f5ed3fa JY |
29 | \r |
30 | #include "IntelVTdPmrPei.h"\r | |
31 | \r | |
32 | #define TOTAL_DMA_BUFFER_SIZE SIZE_4MB\r | |
fc8be1ad | 33 | #define TOTAL_DMA_BUFFER_SIZE_S3 SIZE_1MB\r |
3f5ed3fa | 34 | \r |
a1e7cd0b JY |
35 | EFI_GUID mVTdInfoGuid = {\r |
36 | 0x222f5e30, 0x5cd, 0x49c6, { 0x8a, 0xc, 0x36, 0xd6, 0x58, 0x41, 0xe0, 0x82 }\r | |
37 | };\r | |
38 | \r | |
39 | EFI_GUID mDmaBufferInfoGuid = {\r | |
40 | 0x7b624ec7, 0xfb67, 0x4f9c, { 0xb6, 0xb0, 0x4d, 0xfa, 0x9c, 0x88, 0x20, 0x39 }\r | |
41 | };\r | |
42 | \r | |
43 | typedef struct {\r | |
44 | UINTN DmaBufferBase;\r | |
45 | UINTN DmaBufferSize;\r | |
46 | UINTN DmaBufferCurrentTop;\r | |
47 | UINTN DmaBufferCurrentBottom;\r | |
48 | } DMA_BUFFER_INFO;\r | |
3f5ed3fa JY |
49 | \r |
50 | #define MAP_INFO_SIGNATURE SIGNATURE_32 ('D', 'M', 'A', 'P')\r | |
51 | typedef struct {\r | |
52 | UINT32 Signature;\r | |
53 | EDKII_IOMMU_OPERATION Operation;\r | |
54 | UINTN NumberOfBytes;\r | |
55 | EFI_PHYSICAL_ADDRESS HostAddress;\r | |
56 | EFI_PHYSICAL_ADDRESS DeviceAddress;\r | |
57 | } MAP_INFO;\r | |
58 | \r | |
59 | /**\r | |
60 | \r | |
61 | PEI Memory Layout:\r | |
62 | \r | |
b2725f57 | 63 | +------------------+ <=============== PHMR.Limit (+ alignment) (1 << (HostAddressWidth + 1))\r |
8e9da4ba JY |
64 | | Mem Resource |\r |
65 | | |\r | |
66 | \r | |
3f5ed3fa JY |
67 | +------------------+ <------- EfiMemoryTop\r |
68 | | PEI allocated |\r | |
8e9da4ba | 69 | =========== +==================+ <=============== PHMR.Base\r |
3f5ed3fa JY |
70 | ^ | Commom Buf |\r |
71 | | | -------------- |\r | |
72 | DMA Buffer | * DMA FREE * |\r | |
73 | | | -------------- |\r | |
74 | V | Read/Write Buf |\r | |
e8097a74 | 75 | =========== +==================+ <=============== PLMR.Limit (+ alignment)\r |
3f5ed3fa JY |
76 | | PEI allocated |\r |
77 | | -------------- | <------- EfiFreeMemoryTop\r | |
78 | | * PEI FREE * |\r | |
79 | | -------------- | <------- EfiFreeMemoryBottom\r | |
80 | | hob |\r | |
81 | | -------------- |\r | |
82 | | Stack |\r | |
83 | +------------------+ <------- EfiMemoryBottom / Stack Bottom\r | |
84 | \r | |
85 | +------------------+\r | |
86 | | Mem Alloc Hob |\r | |
87 | +------------------+\r | |
88 | \r | |
8e9da4ba JY |
89 | | |\r |
90 | | Mem Resource |\r | |
91 | +------------------+ <=============== PLMR.Base (0)\r | |
3f5ed3fa JY |
92 | **/\r |
93 | \r | |
3f5ed3fa JY |
94 | /**\r |
95 | Set IOMMU attribute for a system memory.\r | |
96 | \r | |
97 | If the IOMMU PPI exists, the system memory cannot be used\r | |
98 | for DMA by default.\r | |
99 | \r | |
100 | When a device requests a DMA access for a system memory,\r | |
101 | the device driver need use SetAttribute() to update the IOMMU\r | |
102 | attribute to request DMA access (read and/or write).\r | |
103 | \r | |
104 | @param[in] This The PPI instance pointer.\r | |
105 | @param[in] Mapping The mapping value returned from Map().\r | |
106 | @param[in] IoMmuAccess The IOMMU access.\r | |
107 | \r | |
108 | @retval EFI_SUCCESS The IoMmuAccess is set for the memory range specified by DeviceAddress and Length.\r | |
109 | @retval EFI_INVALID_PARAMETER Mapping is not a value that was returned by Map().\r | |
110 | @retval EFI_INVALID_PARAMETER IoMmuAccess specified an illegal combination of access.\r | |
111 | @retval EFI_UNSUPPORTED The bit mask of IoMmuAccess is not supported by the IOMMU.\r | |
112 | @retval EFI_UNSUPPORTED The IOMMU does not support the memory range specified by Mapping.\r | |
113 | @retval EFI_OUT_OF_RESOURCES There are not enough resources available to modify the IOMMU access.\r | |
114 | @retval EFI_DEVICE_ERROR The IOMMU device reported an error while attempting the operation.\r | |
940dbd07 SZ |
115 | @retval EFI_NOT_AVAILABLE_YET DMA protection has been enabled, but DMA buffer are\r |
116 | not available to be allocated yet.\r | |
3f5ed3fa JY |
117 | \r |
118 | **/\r | |
119 | EFI_STATUS\r | |
120 | EFIAPI\r | |
121 | PeiIoMmuSetAttribute (\r | |
122 | IN EDKII_IOMMU_PPI *This,\r | |
123 | IN VOID *Mapping,\r | |
124 | IN UINT64 IoMmuAccess\r | |
125 | )\r | |
126 | {\r | |
940dbd07 SZ |
127 | VOID *Hob;\r |
128 | DMA_BUFFER_INFO *DmaBufferInfo;\r | |
129 | \r | |
130 | Hob = GetFirstGuidHob (&mDmaBufferInfoGuid);\r | |
131 | DmaBufferInfo = GET_GUID_HOB_DATA(Hob);\r | |
132 | \r | |
133 | if (DmaBufferInfo->DmaBufferCurrentTop == 0) {\r | |
134 | return EFI_NOT_AVAILABLE_YET;\r | |
135 | }\r | |
136 | \r | |
3f5ed3fa JY |
137 | return EFI_SUCCESS;\r |
138 | }\r | |
139 | \r | |
140 | /**\r | |
141 | Provides the controller-specific addresses required to access system memory from a\r | |
142 | DMA bus master.\r | |
143 | \r | |
144 | @param This The PPI instance pointer.\r | |
145 | @param Operation Indicates if the bus master is going to read or write to system memory.\r | |
146 | @param HostAddress The system memory address to map to the PCI controller.\r | |
147 | @param NumberOfBytes On input the number of bytes to map. On output the number of bytes\r | |
148 | that were mapped.\r | |
149 | @param DeviceAddress The resulting map address for the bus master PCI controller to use to\r | |
150 | access the hosts HostAddress.\r | |
151 | @param Mapping A resulting value to pass to Unmap().\r | |
152 | \r | |
153 | @retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.\r | |
154 | @retval EFI_UNSUPPORTED The HostAddress cannot be mapped as a common buffer.\r | |
155 | @retval EFI_INVALID_PARAMETER One or more parameters are invalid.\r | |
156 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r | |
157 | @retval EFI_DEVICE_ERROR The system hardware could not map the requested address.\r | |
940dbd07 SZ |
158 | @retval EFI_NOT_AVAILABLE_YET DMA protection has been enabled, but DMA buffer are\r |
159 | not available to be allocated yet.\r | |
3f5ed3fa JY |
160 | \r |
161 | **/\r | |
162 | EFI_STATUS\r | |
163 | EFIAPI\r | |
164 | PeiIoMmuMap (\r | |
165 | IN EDKII_IOMMU_PPI *This,\r | |
166 | IN EDKII_IOMMU_OPERATION Operation,\r | |
167 | IN VOID *HostAddress,\r | |
168 | IN OUT UINTN *NumberOfBytes,\r | |
169 | OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,\r | |
170 | OUT VOID **Mapping\r | |
171 | )\r | |
172 | {\r | |
a1e7cd0b JY |
173 | MAP_INFO *MapInfo;\r |
174 | UINTN Length;\r | |
175 | VOID *Hob;\r | |
176 | DMA_BUFFER_INFO *DmaBufferInfo;\r | |
177 | \r | |
178 | Hob = GetFirstGuidHob (&mDmaBufferInfoGuid);\r | |
179 | DmaBufferInfo = GET_GUID_HOB_DATA(Hob);\r | |
3f5ed3fa | 180 | \r |
940dbd07 SZ |
181 | DEBUG ((DEBUG_VERBOSE, "PeiIoMmuMap - HostAddress - 0x%x, NumberOfBytes - %x\n", HostAddress, *NumberOfBytes));\r |
182 | DEBUG ((DEBUG_VERBOSE, " DmaBufferCurrentTop - %x\n", DmaBufferInfo->DmaBufferCurrentTop));\r | |
183 | DEBUG ((DEBUG_VERBOSE, " DmaBufferCurrentBottom - %x\n", DmaBufferInfo->DmaBufferCurrentBottom));\r | |
184 | \r | |
185 | if (DmaBufferInfo->DmaBufferCurrentTop == 0) {\r | |
186 | return EFI_NOT_AVAILABLE_YET;\r | |
187 | }\r | |
188 | \r | |
3f5ed3fa JY |
189 | if (Operation == EdkiiIoMmuOperationBusMasterCommonBuffer ||\r |
190 | Operation == EdkiiIoMmuOperationBusMasterCommonBuffer64) {\r | |
191 | *DeviceAddress = (UINTN)HostAddress;\r | |
192 | *Mapping = 0;\r | |
193 | return EFI_SUCCESS;\r | |
194 | }\r | |
195 | \r | |
3f5ed3fa | 196 | Length = *NumberOfBytes + sizeof(MAP_INFO);\r |
a1e7cd0b | 197 | if (Length > DmaBufferInfo->DmaBufferCurrentTop - DmaBufferInfo->DmaBufferCurrentBottom) {\r |
3f5ed3fa JY |
198 | DEBUG ((DEBUG_ERROR, "PeiIoMmuMap - OUT_OF_RESOURCE\n"));\r |
199 | ASSERT (FALSE);\r | |
200 | return EFI_OUT_OF_RESOURCES;\r | |
201 | }\r | |
202 | \r | |
a1e7cd0b JY |
203 | *DeviceAddress = DmaBufferInfo->DmaBufferCurrentBottom;\r |
204 | DmaBufferInfo->DmaBufferCurrentBottom += Length;\r | |
3f5ed3fa JY |
205 | \r |
206 | MapInfo = (VOID *)(UINTN)(*DeviceAddress + *NumberOfBytes);\r | |
207 | MapInfo->Signature = MAP_INFO_SIGNATURE;\r | |
208 | MapInfo->Operation = Operation;\r | |
209 | MapInfo->NumberOfBytes = *NumberOfBytes;\r | |
210 | MapInfo->HostAddress = (UINTN)HostAddress;\r | |
211 | MapInfo->DeviceAddress = *DeviceAddress;\r | |
212 | *Mapping = MapInfo;\r | |
213 | DEBUG ((DEBUG_VERBOSE, " Op(%x):DeviceAddress - %x, Mapping - %x\n", Operation, (UINTN)*DeviceAddress, MapInfo));\r | |
214 | \r | |
215 | //\r | |
216 | // If this is a read operation from the Bus Master's point of view,\r | |
217 | // then copy the contents of the real buffer into the mapped buffer\r | |
218 | // so the Bus Master can read the contents of the real buffer.\r | |
219 | //\r | |
220 | if (Operation == EdkiiIoMmuOperationBusMasterRead ||\r | |
221 | Operation == EdkiiIoMmuOperationBusMasterRead64) {\r | |
222 | CopyMem (\r | |
223 | (VOID *) (UINTN) MapInfo->DeviceAddress,\r | |
224 | (VOID *) (UINTN) MapInfo->HostAddress,\r | |
225 | MapInfo->NumberOfBytes\r | |
226 | );\r | |
227 | }\r | |
228 | \r | |
229 | return EFI_SUCCESS;\r | |
230 | }\r | |
231 | \r | |
232 | /**\r | |
233 | Completes the Map() operation and releases any corresponding resources.\r | |
234 | \r | |
235 | @param This The PPI instance pointer.\r | |
236 | @param Mapping The mapping value returned from Map().\r | |
237 | \r | |
238 | @retval EFI_SUCCESS The range was unmapped.\r | |
239 | @retval EFI_INVALID_PARAMETER Mapping is not a value that was returned by Map().\r | |
240 | @retval EFI_DEVICE_ERROR The data was not committed to the target system memory.\r | |
940dbd07 SZ |
241 | @retval EFI_NOT_AVAILABLE_YET DMA protection has been enabled, but DMA buffer are\r |
242 | not available to be allocated yet.\r | |
243 | \r | |
3f5ed3fa JY |
244 | **/\r |
245 | EFI_STATUS\r | |
246 | EFIAPI\r | |
247 | PeiIoMmuUnmap (\r | |
248 | IN EDKII_IOMMU_PPI *This,\r | |
249 | IN VOID *Mapping\r | |
250 | )\r | |
251 | {\r | |
a1e7cd0b JY |
252 | MAP_INFO *MapInfo;\r |
253 | UINTN Length;\r | |
254 | VOID *Hob;\r | |
255 | DMA_BUFFER_INFO *DmaBufferInfo;\r | |
256 | \r | |
257 | Hob = GetFirstGuidHob (&mDmaBufferInfoGuid);\r | |
258 | DmaBufferInfo = GET_GUID_HOB_DATA(Hob);\r | |
3f5ed3fa | 259 | \r |
3f5ed3fa | 260 | DEBUG ((DEBUG_VERBOSE, "PeiIoMmuUnmap - Mapping - %x\n", Mapping));\r |
a1e7cd0b JY |
261 | DEBUG ((DEBUG_VERBOSE, " DmaBufferCurrentTop - %x\n", DmaBufferInfo->DmaBufferCurrentTop));\r |
262 | DEBUG ((DEBUG_VERBOSE, " DmaBufferCurrentBottom - %x\n", DmaBufferInfo->DmaBufferCurrentBottom));\r | |
3f5ed3fa | 263 | \r |
940dbd07 SZ |
264 | if (DmaBufferInfo->DmaBufferCurrentTop == 0) {\r |
265 | return EFI_NOT_AVAILABLE_YET;\r | |
266 | }\r | |
267 | \r | |
268 | if (Mapping == NULL) {\r | |
269 | return EFI_INVALID_PARAMETER;\r | |
270 | }\r | |
271 | \r | |
3f5ed3fa JY |
272 | MapInfo = Mapping;\r |
273 | ASSERT (MapInfo->Signature == MAP_INFO_SIGNATURE);\r | |
274 | DEBUG ((DEBUG_VERBOSE, " Op(%x):DeviceAddress - %x, NumberOfBytes - %x\n", MapInfo->Operation, (UINTN)MapInfo->DeviceAddress, MapInfo->NumberOfBytes));\r | |
275 | \r | |
276 | //\r | |
277 | // If this is a write operation from the Bus Master's point of view,\r | |
278 | // then copy the contents of the mapped buffer into the real buffer\r | |
279 | // so the processor can read the contents of the real buffer.\r | |
280 | //\r | |
281 | if (MapInfo->Operation == EdkiiIoMmuOperationBusMasterWrite ||\r | |
282 | MapInfo->Operation == EdkiiIoMmuOperationBusMasterWrite64) {\r | |
283 | CopyMem (\r | |
284 | (VOID *) (UINTN) MapInfo->HostAddress,\r | |
285 | (VOID *) (UINTN) MapInfo->DeviceAddress,\r | |
286 | MapInfo->NumberOfBytes\r | |
287 | );\r | |
288 | }\r | |
289 | \r | |
290 | Length = MapInfo->NumberOfBytes + sizeof(MAP_INFO);\r | |
a1e7cd0b JY |
291 | if (DmaBufferInfo->DmaBufferCurrentBottom == MapInfo->DeviceAddress + Length) {\r |
292 | DmaBufferInfo->DmaBufferCurrentBottom -= Length;\r | |
3f5ed3fa JY |
293 | }\r |
294 | \r | |
295 | return EFI_SUCCESS;\r | |
296 | }\r | |
297 | \r | |
298 | /**\r | |
299 | Allocates pages that are suitable for an OperationBusMasterCommonBuffer or\r | |
300 | OperationBusMasterCommonBuffer64 mapping.\r | |
301 | \r | |
302 | @param This The PPI instance pointer.\r | |
303 | @param MemoryType The type of memory to allocate, EfiBootServicesData or\r | |
304 | EfiRuntimeServicesData.\r | |
305 | @param Pages The number of pages to allocate.\r | |
306 | @param HostAddress A pointer to store the base system memory address of the\r | |
307 | allocated range.\r | |
308 | @param Attributes The requested bit mask of attributes for the allocated range.\r | |
309 | \r | |
310 | @retval EFI_SUCCESS The requested memory pages were allocated.\r | |
311 | @retval EFI_UNSUPPORTED Attributes is unsupported. The only legal attribute bits are\r | |
34e18d17 | 312 | MEMORY_WRITE_COMBINE, MEMORY_CACHED and DUAL_ADDRESS_CYCLE.\r |
3f5ed3fa JY |
313 | @retval EFI_INVALID_PARAMETER One or more parameters are invalid.\r |
314 | @retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.\r | |
940dbd07 SZ |
315 | @retval EFI_NOT_AVAILABLE_YET DMA protection has been enabled, but DMA buffer are\r |
316 | not available to be allocated yet.\r | |
3f5ed3fa JY |
317 | \r |
318 | **/\r | |
319 | EFI_STATUS\r | |
320 | EFIAPI\r | |
321 | PeiIoMmuAllocateBuffer (\r | |
322 | IN EDKII_IOMMU_PPI *This,\r | |
323 | IN EFI_MEMORY_TYPE MemoryType,\r | |
324 | IN UINTN Pages,\r | |
325 | IN OUT VOID **HostAddress,\r | |
326 | IN UINT64 Attributes\r | |
327 | )\r | |
328 | {\r | |
a1e7cd0b JY |
329 | UINTN Length;\r |
330 | VOID *Hob;\r | |
331 | DMA_BUFFER_INFO *DmaBufferInfo;\r | |
332 | \r | |
333 | Hob = GetFirstGuidHob (&mDmaBufferInfoGuid);\r | |
334 | DmaBufferInfo = GET_GUID_HOB_DATA(Hob);\r | |
3f5ed3fa JY |
335 | \r |
336 | DEBUG ((DEBUG_VERBOSE, "PeiIoMmuAllocateBuffer - page - %x\n", Pages));\r | |
a1e7cd0b JY |
337 | DEBUG ((DEBUG_VERBOSE, " DmaBufferCurrentTop - %x\n", DmaBufferInfo->DmaBufferCurrentTop));\r |
338 | DEBUG ((DEBUG_VERBOSE, " DmaBufferCurrentBottom - %x\n", DmaBufferInfo->DmaBufferCurrentBottom));\r | |
3f5ed3fa | 339 | \r |
940dbd07 SZ |
340 | if (DmaBufferInfo->DmaBufferCurrentTop == 0) {\r |
341 | return EFI_NOT_AVAILABLE_YET;\r | |
342 | }\r | |
343 | \r | |
3f5ed3fa | 344 | Length = EFI_PAGES_TO_SIZE(Pages);\r |
a1e7cd0b | 345 | if (Length > DmaBufferInfo->DmaBufferCurrentTop - DmaBufferInfo->DmaBufferCurrentBottom) {\r |
3f5ed3fa JY |
346 | DEBUG ((DEBUG_ERROR, "PeiIoMmuAllocateBuffer - OUT_OF_RESOURCE\n"));\r |
347 | ASSERT (FALSE);\r | |
348 | return EFI_OUT_OF_RESOURCES;\r | |
349 | }\r | |
a1e7cd0b JY |
350 | *HostAddress = (VOID *)(UINTN)(DmaBufferInfo->DmaBufferCurrentTop - Length);\r |
351 | DmaBufferInfo->DmaBufferCurrentTop -= Length;\r | |
3f5ed3fa JY |
352 | \r |
353 | DEBUG ((DEBUG_VERBOSE, "PeiIoMmuAllocateBuffer - allocate - %x\n", *HostAddress));\r | |
354 | return EFI_SUCCESS;\r | |
355 | }\r | |
356 | \r | |
357 | /**\r | |
358 | Frees memory that was allocated with AllocateBuffer().\r | |
359 | \r | |
360 | @param This The PPI instance pointer.\r | |
361 | @param Pages The number of pages to free.\r | |
362 | @param HostAddress The base system memory address of the allocated range.\r | |
363 | \r | |
364 | @retval EFI_SUCCESS The requested memory pages were freed.\r | |
365 | @retval EFI_INVALID_PARAMETER The memory range specified by HostAddress and Pages\r | |
366 | was not allocated with AllocateBuffer().\r | |
940dbd07 SZ |
367 | @retval EFI_NOT_AVAILABLE_YET DMA protection has been enabled, but DMA buffer are\r |
368 | not available to be allocated yet.\r | |
3f5ed3fa JY |
369 | \r |
370 | **/\r | |
371 | EFI_STATUS\r | |
372 | EFIAPI\r | |
373 | PeiIoMmuFreeBuffer (\r | |
374 | IN EDKII_IOMMU_PPI *This,\r | |
375 | IN UINTN Pages,\r | |
376 | IN VOID *HostAddress\r | |
377 | )\r | |
378 | {\r | |
a1e7cd0b JY |
379 | UINTN Length;\r |
380 | VOID *Hob;\r | |
381 | DMA_BUFFER_INFO *DmaBufferInfo;\r | |
382 | \r | |
383 | Hob = GetFirstGuidHob (&mDmaBufferInfoGuid);\r | |
384 | DmaBufferInfo = GET_GUID_HOB_DATA(Hob);\r | |
3f5ed3fa JY |
385 | \r |
386 | DEBUG ((DEBUG_VERBOSE, "PeiIoMmuFreeBuffer - page - %x, HostAddr - %x\n", Pages, HostAddress));\r | |
a1e7cd0b JY |
387 | DEBUG ((DEBUG_VERBOSE, " DmaBufferCurrentTop - %x\n", DmaBufferInfo->DmaBufferCurrentTop));\r |
388 | DEBUG ((DEBUG_VERBOSE, " DmaBufferCurrentBottom - %x\n", DmaBufferInfo->DmaBufferCurrentBottom));\r | |
3f5ed3fa | 389 | \r |
940dbd07 SZ |
390 | if (DmaBufferInfo->DmaBufferCurrentTop == 0) {\r |
391 | return EFI_NOT_AVAILABLE_YET;\r | |
392 | }\r | |
393 | \r | |
3f5ed3fa | 394 | Length = EFI_PAGES_TO_SIZE(Pages);\r |
a1e7cd0b JY |
395 | if ((UINTN)HostAddress == DmaBufferInfo->DmaBufferCurrentTop) {\r |
396 | DmaBufferInfo->DmaBufferCurrentTop += Length;\r | |
3f5ed3fa JY |
397 | }\r |
398 | \r | |
399 | return EFI_SUCCESS;\r | |
400 | }\r | |
401 | \r | |
402 | EDKII_IOMMU_PPI mIoMmuPpi = {\r | |
403 | EDKII_IOMMU_PPI_REVISION,\r | |
404 | PeiIoMmuSetAttribute,\r | |
405 | PeiIoMmuMap,\r | |
406 | PeiIoMmuUnmap,\r | |
407 | PeiIoMmuAllocateBuffer,\r | |
408 | PeiIoMmuFreeBuffer,\r | |
409 | };\r | |
410 | \r | |
411 | CONST EFI_PEI_PPI_DESCRIPTOR mIoMmuPpiList = {\r | |
412 | EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST,\r | |
413 | &gEdkiiIoMmuPpiGuid,\r | |
414 | (VOID *) &mIoMmuPpi\r | |
415 | };\r | |
416 | \r | |
3f5ed3fa JY |
417 | /**\r |
418 | Initialize DMA protection.\r | |
419 | \r | |
a1e7cd0b | 420 | @param VTdInfo The VTd engine context information.\r |
3f5ed3fa JY |
421 | \r |
422 | @retval EFI_SUCCESS the DMA protection is initialized.\r | |
423 | @retval EFI_OUT_OF_RESOURCES no enough resource to initialize DMA protection.\r | |
424 | **/\r | |
425 | EFI_STATUS\r | |
426 | InitDmaProtection (\r | |
ed0e52fc | 427 | IN VTD_INFO *VTdInfo\r |
3f5ed3fa JY |
428 | )\r |
429 | {\r | |
430 | EFI_STATUS Status;\r | |
3f5ed3fa JY |
431 | UINT32 LowMemoryAlignment;\r |
432 | UINT64 HighMemoryAlignment;\r | |
433 | UINTN MemoryAlignment;\r | |
434 | UINTN LowBottom;\r | |
435 | UINTN LowTop;\r | |
436 | UINTN HighBottom;\r | |
437 | UINT64 HighTop;\r | |
ed0e52fc SZ |
438 | DMA_BUFFER_INFO *DmaBufferInfo;\r |
439 | VOID *Hob;\r | |
940dbd07 SZ |
440 | EFI_PEI_PPI_DESCRIPTOR *OldDescriptor;\r |
441 | EDKII_IOMMU_PPI *OldIoMmuPpi;\r | |
ed0e52fc SZ |
442 | \r |
443 | Hob = GetFirstGuidHob (&mDmaBufferInfoGuid);\r | |
444 | DmaBufferInfo = GET_GUID_HOB_DATA(Hob);\r | |
445 | \r | |
446 | DEBUG ((DEBUG_INFO, " DmaBufferSize : 0x%x\n", DmaBufferInfo->DmaBufferSize));\r | |
3f5ed3fa | 447 | \r |
a1e7cd0b JY |
448 | LowMemoryAlignment = GetLowMemoryAlignment (VTdInfo, VTdInfo->EngineMask);\r |
449 | HighMemoryAlignment = GetHighMemoryAlignment (VTdInfo, VTdInfo->EngineMask);\r | |
3f5ed3fa JY |
450 | if (LowMemoryAlignment < HighMemoryAlignment) {\r |
451 | MemoryAlignment = (UINTN)HighMemoryAlignment;\r | |
452 | } else {\r | |
453 | MemoryAlignment = LowMemoryAlignment;\r | |
454 | }\r | |
ed0e52fc SZ |
455 | ASSERT (DmaBufferInfo->DmaBufferSize == ALIGN_VALUE(DmaBufferInfo->DmaBufferSize, MemoryAlignment));\r |
456 | DmaBufferInfo->DmaBufferBase = (UINTN)AllocateAlignedPages (EFI_SIZE_TO_PAGES(DmaBufferInfo->DmaBufferSize), MemoryAlignment);\r | |
457 | ASSERT (DmaBufferInfo->DmaBufferBase != 0);\r | |
458 | if (DmaBufferInfo->DmaBufferBase == 0) {\r | |
3f5ed3fa JY |
459 | DEBUG ((DEBUG_INFO, " InitDmaProtection : OutOfResource\n"));\r |
460 | return EFI_OUT_OF_RESOURCES;\r | |
461 | }\r | |
462 | \r | |
ed0e52fc SZ |
463 | DEBUG ((DEBUG_INFO, " DmaBufferBase : 0x%x\n", DmaBufferInfo->DmaBufferBase));\r |
464 | \r | |
465 | DmaBufferInfo->DmaBufferCurrentTop = DmaBufferInfo->DmaBufferBase + DmaBufferInfo->DmaBufferSize;\r | |
466 | DmaBufferInfo->DmaBufferCurrentBottom = DmaBufferInfo->DmaBufferBase;\r | |
467 | \r | |
468 | //\r | |
940dbd07 | 469 | // (Re)Install PPI.\r |
ed0e52fc | 470 | //\r |
940dbd07 SZ |
471 | Status = PeiServicesLocatePpi (\r |
472 | &gEdkiiIoMmuPpiGuid,\r | |
473 | 0,\r | |
474 | &OldDescriptor,\r | |
475 | (VOID **) &OldIoMmuPpi\r | |
476 | );\r | |
477 | if (!EFI_ERROR (Status)) {\r | |
478 | Status = PeiServicesReInstallPpi (OldDescriptor, &mIoMmuPpiList);\r | |
479 | } else {\r | |
480 | Status = PeiServicesInstallPpi (&mIoMmuPpiList);\r | |
481 | }\r | |
482 | ASSERT_EFI_ERROR (Status);\r | |
ed0e52fc | 483 | \r |
3f5ed3fa | 484 | LowBottom = 0;\r |
ed0e52fc SZ |
485 | LowTop = DmaBufferInfo->DmaBufferBase;\r |
486 | HighBottom = DmaBufferInfo->DmaBufferBase + DmaBufferInfo->DmaBufferSize;\r | |
b2725f57 | 487 | HighTop = LShiftU64 (1, VTdInfo->HostAddressWidth + 1);\r |
3f5ed3fa JY |
488 | \r |
489 | Status = SetDmaProtectedRange (\r | |
a1e7cd0b JY |
490 | VTdInfo,\r |
491 | VTdInfo->EngineMask,\r | |
492 | (UINT32)LowBottom,\r | |
493 | (UINT32)(LowTop - LowBottom),\r | |
494 | HighBottom,\r | |
495 | HighTop - HighBottom\r | |
496 | );\r | |
3f5ed3fa JY |
497 | \r |
498 | if (EFI_ERROR(Status)) {\r | |
ed0e52fc | 499 | FreePages ((VOID *)DmaBufferInfo->DmaBufferBase, EFI_SIZE_TO_PAGES(DmaBufferInfo->DmaBufferSize));\r |
3f5ed3fa JY |
500 | }\r |
501 | \r | |
502 | return Status;\r | |
503 | }\r | |
504 | \r | |
8e9da4ba | 505 | /**\r |
a1e7cd0b JY |
506 | Initializes the Intel VTd Info.\r |
507 | \r | |
508 | @retval EFI_SUCCESS Usb bot driver is successfully initialized.\r | |
509 | @retval EFI_OUT_OF_RESOURCES Can't initialize the driver.\r | |
8e9da4ba | 510 | \r |
8e9da4ba | 511 | **/\r |
a1e7cd0b JY |
512 | EFI_STATUS\r |
513 | InitVTdInfo (\r | |
514 | VOID\r | |
8e9da4ba JY |
515 | )\r |
516 | {\r | |
a1e7cd0b JY |
517 | EFI_STATUS Status;\r |
518 | EFI_ACPI_DMAR_HEADER *AcpiDmarTable;\r | |
519 | VOID *Hob;\r | |
8e9da4ba | 520 | \r |
a1e7cd0b JY |
521 | Status = PeiServicesLocatePpi (\r |
522 | &gEdkiiVTdInfoPpiGuid,\r | |
523 | 0,\r | |
524 | NULL,\r | |
525 | (VOID **)&AcpiDmarTable\r | |
526 | );\r | |
527 | ASSERT_EFI_ERROR(Status);\r | |
8e9da4ba | 528 | \r |
a1e7cd0b | 529 | DumpAcpiDMAR (AcpiDmarTable);\r |
8e9da4ba | 530 | \r |
a1e7cd0b JY |
531 | //\r |
532 | // Clear old VTdInfo Hob.\r | |
533 | //\r | |
534 | Hob = GetFirstGuidHob (&mVTdInfoGuid);\r | |
535 | if (Hob != NULL) {\r | |
536 | ZeroMem (&((EFI_HOB_GUID_TYPE *)Hob)->Name, sizeof(EFI_GUID));\r | |
8e9da4ba JY |
537 | }\r |
538 | \r | |
a1e7cd0b JY |
539 | //\r |
540 | // Get DMAR information to local VTdInfo\r | |
541 | //\r | |
542 | Status = ParseDmarAcpiTableDrhd (AcpiDmarTable);\r | |
543 | if (EFI_ERROR(Status)) {\r | |
544 | return Status;\r | |
8e9da4ba JY |
545 | }\r |
546 | \r | |
a1e7cd0b JY |
547 | //\r |
548 | // NOTE: Do not parse RMRR here, because RMRR may cause PMR programming.\r | |
549 | //\r | |
8e9da4ba | 550 | \r |
a1e7cd0b | 551 | return EFI_SUCCESS;\r |
8e9da4ba JY |
552 | }\r |
553 | \r | |
554 | /**\r | |
a1e7cd0b JY |
555 | Initializes the Intel VTd PMR for all memory.\r |
556 | \r | |
557 | @retval EFI_SUCCESS Usb bot driver is successfully initialized.\r | |
558 | @retval EFI_OUT_OF_RESOURCES Can't initialize the driver.\r | |
8e9da4ba | 559 | \r |
8e9da4ba | 560 | **/\r |
a1e7cd0b JY |
561 | EFI_STATUS\r |
562 | InitVTdPmrForAll (\r | |
563 | VOID\r | |
8e9da4ba JY |
564 | )\r |
565 | {\r | |
a1e7cd0b JY |
566 | EFI_STATUS Status;\r |
567 | VOID *Hob;\r | |
568 | VTD_INFO *VTdInfo;\r | |
569 | UINTN LowBottom;\r | |
570 | UINTN LowTop;\r | |
571 | UINTN HighBottom;\r | |
572 | UINT64 HighTop;\r | |
8e9da4ba | 573 | \r |
a1e7cd0b JY |
574 | Hob = GetFirstGuidHob (&mVTdInfoGuid);\r |
575 | VTdInfo = GET_GUID_HOB_DATA(Hob);\r | |
8e9da4ba | 576 | \r |
a1e7cd0b JY |
577 | LowBottom = 0;\r |
578 | LowTop = 0;\r | |
579 | HighBottom = 0;\r | |
9dd8b190 | 580 | HighTop = LShiftU64 (1, VTdInfo->HostAddressWidth + 1);\r |
8e9da4ba | 581 | \r |
a1e7cd0b JY |
582 | Status = SetDmaProtectedRange (\r |
583 | VTdInfo,\r | |
584 | VTdInfo->EngineMask,\r | |
585 | (UINT32)LowBottom,\r | |
586 | (UINT32)(LowTop - LowBottom),\r | |
587 | HighBottom,\r | |
588 | HighTop - HighBottom\r | |
589 | );\r | |
8e9da4ba | 590 | \r |
a1e7cd0b | 591 | return Status;\r |
8e9da4ba JY |
592 | }\r |
593 | \r | |
594 | /**\r | |
a1e7cd0b JY |
595 | Initializes the Intel VTd PMR for DMA buffer.\r |
596 | \r | |
597 | @retval EFI_SUCCESS Usb bot driver is successfully initialized.\r | |
598 | @retval EFI_OUT_OF_RESOURCES Can't initialize the driver.\r | |
8e9da4ba | 599 | \r |
8e9da4ba | 600 | **/\r |
a1e7cd0b JY |
601 | EFI_STATUS\r |
602 | InitVTdPmrForDma (\r | |
603 | VOID\r | |
8e9da4ba JY |
604 | )\r |
605 | {\r | |
a1e7cd0b JY |
606 | EFI_STATUS Status;\r |
607 | VOID *Hob;\r | |
608 | VTD_INFO *VTdInfo;\r | |
8e9da4ba | 609 | \r |
a1e7cd0b JY |
610 | Hob = GetFirstGuidHob (&mVTdInfoGuid);\r |
611 | VTdInfo = GET_GUID_HOB_DATA(Hob);\r | |
8e9da4ba JY |
612 | \r |
613 | //\r | |
a1e7cd0b | 614 | // If there is RMRR memory, parse it here.\r |
8e9da4ba | 615 | //\r |
a1e7cd0b | 616 | ParseDmarAcpiTableRmrr (VTdInfo);\r |
8e9da4ba | 617 | \r |
8e9da4ba | 618 | //\r |
ed0e52fc SZ |
619 | // Allocate a range in PEI memory as DMA buffer\r |
620 | // Mark others to be DMA protected.\r | |
8e9da4ba | 621 | //\r |
ed0e52fc | 622 | Status = InitDmaProtection (VTdInfo);\r |
8e9da4ba | 623 | \r |
a1e7cd0b | 624 | return Status;\r |
8e9da4ba JY |
625 | }\r |
626 | \r | |
627 | /**\r | |
a1e7cd0b | 628 | This function handles S3 resume task at the end of PEI\r |
8e9da4ba | 629 | \r |
a1e7cd0b JY |
630 | @param[in] PeiServices Pointer to PEI Services Table.\r |
631 | @param[in] NotifyDesc Pointer to the descriptor for the Notification event that\r | |
632 | caused this function to execute.\r | |
633 | @param[in] Ppi Pointer to the PPI data associated with this function.\r | |
8e9da4ba | 634 | \r |
a1e7cd0b | 635 | @retval EFI_STATUS Always return EFI_SUCCESS\r |
8e9da4ba | 636 | **/\r |
a1e7cd0b JY |
637 | EFI_STATUS\r |
638 | EFIAPI\r | |
639 | S3EndOfPeiNotify(\r | |
640 | IN EFI_PEI_SERVICES **PeiServices,\r | |
641 | IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDesc,\r | |
642 | IN VOID *Ppi\r | |
8e9da4ba JY |
643 | )\r |
644 | {\r | |
a1e7cd0b JY |
645 | VOID *Hob;\r |
646 | VTD_INFO *VTdInfo;\r | |
647 | UINT64 EngineMask;\r | |
8e9da4ba | 648 | \r |
a1e7cd0b | 649 | DEBUG((DEBUG_INFO, "VTdPmr S3EndOfPeiNotify\n"));\r |
8e9da4ba | 650 | \r |
a1e7cd0b JY |
651 | if ((PcdGet8(PcdVTdPolicyPropertyMask) & BIT1) == 0) {\r |
652 | Hob = GetFirstGuidHob (&mVTdInfoGuid);\r | |
653 | if (Hob == NULL) {\r | |
654 | return EFI_SUCCESS;\r | |
8e9da4ba | 655 | }\r |
a1e7cd0b | 656 | VTdInfo = GET_GUID_HOB_DATA(Hob);\r |
8e9da4ba | 657 | \r |
a1e7cd0b JY |
658 | EngineMask = LShiftU64 (1, VTdInfo->VTdEngineCount) - 1;\r |
659 | DisableDmaProtection (VTdInfo, EngineMask);\r | |
8e9da4ba | 660 | }\r |
a1e7cd0b | 661 | return EFI_SUCCESS;\r |
8e9da4ba JY |
662 | }\r |
663 | \r | |
a1e7cd0b JY |
664 | EFI_PEI_NOTIFY_DESCRIPTOR mS3EndOfPeiNotifyDesc = {\r |
665 | (EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),\r | |
666 | &gEfiEndOfPeiSignalPpiGuid,\r | |
667 | S3EndOfPeiNotify\r | |
668 | };\r | |
8e9da4ba | 669 | \r |
fc8be1ad | 670 | /**\r |
a1e7cd0b | 671 | This function handles VTd engine setup\r |
fc8be1ad JY |
672 | \r |
673 | @param[in] PeiServices Pointer to PEI Services Table.\r | |
674 | @param[in] NotifyDesc Pointer to the descriptor for the Notification event that\r | |
675 | caused this function to execute.\r | |
676 | @param[in] Ppi Pointer to the PPI data associated with this function.\r | |
677 | \r | |
678 | @retval EFI_STATUS Always return EFI_SUCCESS\r | |
679 | **/\r | |
680 | EFI_STATUS\r | |
681 | EFIAPI\r | |
a1e7cd0b | 682 | VTdInfoNotify (\r |
fc8be1ad JY |
683 | IN EFI_PEI_SERVICES **PeiServices,\r |
684 | IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDesc,\r | |
685 | IN VOID *Ppi\r | |
686 | )\r | |
687 | {\r | |
a1e7cd0b JY |
688 | EFI_STATUS Status;\r |
689 | VOID *MemoryDiscovered;\r | |
690 | UINT64 EnabledEngineMask;\r | |
691 | VOID *Hob;\r | |
692 | VTD_INFO *VTdInfo;\r | |
693 | BOOLEAN MemoryInitialized;\r | |
fc8be1ad | 694 | \r |
a1e7cd0b JY |
695 | DEBUG ((DEBUG_INFO, "VTdInfoNotify\n"));\r |
696 | \r | |
697 | //\r | |
698 | // Check if memory is initialized.\r | |
699 | //\r | |
700 | MemoryInitialized = FALSE;\r | |
701 | Status = PeiServicesLocatePpi (\r | |
702 | &gEfiPeiMemoryDiscoveredPpiGuid,\r | |
703 | 0,\r | |
704 | NULL,\r | |
705 | &MemoryDiscovered\r | |
706 | );\r | |
707 | if (!EFI_ERROR(Status)) {\r | |
708 | MemoryInitialized = TRUE;\r | |
709 | }\r | |
710 | \r | |
711 | DEBUG ((DEBUG_INFO, "MemoryInitialized - %x\n", MemoryInitialized));\r | |
712 | \r | |
713 | if (!MemoryInitialized) {\r | |
714 | //\r | |
715 | // If the memory is not initialized,\r | |
716 | // Protect all system memory\r | |
717 | //\r | |
718 | InitVTdInfo ();\r | |
719 | InitVTdPmrForAll ();\r | |
940dbd07 SZ |
720 | \r |
721 | //\r | |
722 | // Install PPI.\r | |
723 | //\r | |
724 | Status = PeiServicesInstallPpi (&mIoMmuPpiList);\r | |
725 | ASSERT_EFI_ERROR(Status);\r | |
a1e7cd0b JY |
726 | } else {\r |
727 | //\r | |
728 | // If the memory is initialized,\r | |
729 | // Allocate DMA buffer and protect rest system memory\r | |
730 | //\r | |
731 | \r | |
732 | //\r | |
733 | // NOTE: We need reinit VTdInfo because previous information might be overriden.\r | |
734 | //\r | |
735 | InitVTdInfo ();\r | |
736 | \r | |
737 | Hob = GetFirstGuidHob (&mVTdInfoGuid);\r | |
738 | VTdInfo = GET_GUID_HOB_DATA(Hob);\r | |
739 | \r | |
740 | //\r | |
741 | // NOTE: We need check if PMR is enabled or not.\r | |
742 | //\r | |
743 | EnabledEngineMask = GetDmaProtectionEnabledEngineMask (VTdInfo, VTdInfo->EngineMask);\r | |
744 | if (EnabledEngineMask != 0) {\r | |
745 | EnableVTdTranslationProtection (VTdInfo, EnabledEngineMask);\r | |
746 | DisableDmaProtection (VTdInfo, EnabledEngineMask);\r | |
747 | }\r | |
748 | InitVTdPmrForDma ();\r | |
749 | if (EnabledEngineMask != 0) {\r | |
750 | DisableVTdTranslationProtection (VTdInfo, EnabledEngineMask);\r | |
751 | }\r | |
fc8be1ad | 752 | \r |
fc8be1ad | 753 | }\r |
a1e7cd0b | 754 | \r |
fc8be1ad JY |
755 | return EFI_SUCCESS;\r |
756 | }\r | |
757 | \r | |
a1e7cd0b | 758 | EFI_PEI_NOTIFY_DESCRIPTOR mVTdInfoNotifyDesc = {\r |
fc8be1ad | 759 | (EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),\r |
a1e7cd0b JY |
760 | &gEdkiiVTdInfoPpiGuid,\r |
761 | VTdInfoNotify\r | |
fc8be1ad JY |
762 | };\r |
763 | \r | |
3f5ed3fa JY |
764 | /**\r |
765 | Initializes the Intel VTd PMR PEIM.\r | |
766 | \r | |
767 | @param FileHandle Handle of the file being invoked.\r | |
768 | @param PeiServices Describes the list of possible PEI Services.\r | |
769 | \r | |
770 | @retval EFI_SUCCESS Usb bot driver is successfully initialized.\r | |
771 | @retval EFI_OUT_OF_RESOURCES Can't initialize the driver.\r | |
772 | \r | |
773 | **/\r | |
774 | EFI_STATUS\r | |
775 | EFIAPI\r | |
776 | IntelVTdPmrInitialize (\r | |
777 | IN EFI_PEI_FILE_HANDLE FileHandle,\r | |
778 | IN CONST EFI_PEI_SERVICES **PeiServices\r | |
779 | )\r | |
780 | {\r | |
781 | EFI_STATUS Status;\r | |
fc8be1ad | 782 | EFI_BOOT_MODE BootMode;\r |
a1e7cd0b JY |
783 | DMA_BUFFER_INFO *DmaBufferInfo;\r |
784 | \r | |
785 | DEBUG ((DEBUG_INFO, "IntelVTdPmrInitialize\n"));\r | |
3f5ed3fa JY |
786 | \r |
787 | if ((PcdGet8(PcdVTdPolicyPropertyMask) & BIT0) == 0) {\r | |
788 | return EFI_UNSUPPORTED;\r | |
789 | }\r | |
790 | \r | |
a1e7cd0b JY |
791 | DmaBufferInfo = BuildGuidHob (&mDmaBufferInfoGuid, sizeof(DMA_BUFFER_INFO));\r |
792 | ASSERT(DmaBufferInfo != NULL);\r | |
793 | if (DmaBufferInfo == NULL) {\r | |
794 | return EFI_OUT_OF_RESOURCES;\r | |
8e9da4ba | 795 | }\r |
a1e7cd0b | 796 | ZeroMem (DmaBufferInfo, sizeof(DMA_BUFFER_INFO));\r |
8e9da4ba | 797 | \r |
a1e7cd0b | 798 | PeiServicesGetBootMode (&BootMode);\r |
8e9da4ba | 799 | \r |
fc8be1ad | 800 | if (BootMode == BOOT_ON_S3_RESUME) {\r |
a1e7cd0b | 801 | DmaBufferInfo->DmaBufferSize = TOTAL_DMA_BUFFER_SIZE_S3;\r |
fc8be1ad | 802 | } else {\r |
a1e7cd0b | 803 | DmaBufferInfo->DmaBufferSize = TOTAL_DMA_BUFFER_SIZE;\r |
3f5ed3fa JY |
804 | }\r |
805 | \r | |
a1e7cd0b JY |
806 | Status = PeiServicesNotifyPpi (&mVTdInfoNotifyDesc);\r |
807 | ASSERT_EFI_ERROR (Status);\r | |
3f5ed3fa | 808 | \r |
fc8be1ad | 809 | //\r |
a1e7cd0b | 810 | // Register EndOfPei Notify for S3\r |
fc8be1ad JY |
811 | //\r |
812 | if (BootMode == BOOT_ON_S3_RESUME) {\r | |
813 | Status = PeiServicesNotifyPpi (&mS3EndOfPeiNotifyDesc);\r | |
814 | ASSERT_EFI_ERROR (Status);\r | |
815 | }\r | |
816 | \r | |
a1e7cd0b | 817 | return EFI_SUCCESS;\r |
3f5ed3fa JY |
818 | }\r |
819 | \r |