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c049fc99 JY |
1 | /** @file\r |
2 | \r | |
3 | Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>\r | |
4 | This program and the accompanying materials\r | |
5 | are licensed and made available under the terms and conditions of the BSD License\r | |
6 | which accompanies this distribution. The full text of the license may be found at\r | |
7 | http://opensource.org/licenses/bsd-license.php.\r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
11 | \r | |
12 | **/\r | |
13 | \r | |
14 | #include "DmaProtection.h"\r | |
15 | \r | |
16 | /**\r | |
f77d35c7 | 17 | Return the index of PCI data.\r |
c049fc99 JY |
18 | \r |
19 | @param[in] VtdIndex The index used to identify a VTd engine.\r | |
20 | @param[in] Segment The Segment used to identify a VTd engine.\r | |
21 | @param[in] SourceId The SourceId used to identify a VTd engine and table entry.\r | |
22 | \r | |
f77d35c7 JY |
23 | @return The index of the PCI data.\r |
24 | @retval (UINTN)-1 The PCI data is not found.\r | |
c049fc99 JY |
25 | **/\r |
26 | UINTN\r | |
f77d35c7 | 27 | GetPciDataIndex (\r |
c049fc99 JY |
28 | IN UINTN VtdIndex,\r |
29 | IN UINT16 Segment,\r | |
30 | IN VTD_SOURCE_ID SourceId\r | |
31 | )\r | |
32 | {\r | |
f77d35c7 JY |
33 | UINTN Index;\r |
34 | VTD_SOURCE_ID *PciSourceId;\r | |
c049fc99 JY |
35 | \r |
36 | if (Segment != mVtdUnitInformation[VtdIndex].Segment) {\r | |
37 | return (UINTN)-1;\r | |
38 | }\r | |
39 | \r | |
f77d35c7 JY |
40 | for (Index = 0; Index < mVtdUnitInformation[VtdIndex].PciDeviceInfo.PciDeviceDataNumber; Index++) {\r |
41 | PciSourceId = &mVtdUnitInformation[VtdIndex].PciDeviceInfo.PciDeviceData[Index].PciSourceId;\r | |
42 | if ((PciSourceId->Bits.Bus == SourceId.Bits.Bus) &&\r | |
43 | (PciSourceId->Bits.Device == SourceId.Bits.Device) &&\r | |
44 | (PciSourceId->Bits.Function == SourceId.Bits.Function) ) {\r | |
c049fc99 JY |
45 | return Index;\r |
46 | }\r | |
47 | }\r | |
48 | \r | |
49 | return (UINTN)-1;\r | |
50 | }\r | |
51 | \r | |
52 | /**\r | |
f77d35c7 | 53 | Register PCI device to VTd engine.\r |
c049fc99 JY |
54 | \r |
55 | @param[in] VtdIndex The index of VTd engine.\r | |
56 | @param[in] Segment The segment of the source.\r | |
57 | @param[in] SourceId The SourceId of the source.\r | |
f77d35c7 | 58 | @param[in] DeviceType The DMAR device scope type.\r |
c049fc99 JY |
59 | @param[in] CheckExist TRUE: ERROR will be returned if the PCI device is already registered.\r |
60 | FALSE: SUCCESS will be returned if the PCI device is registered.\r | |
61 | \r | |
62 | @retval EFI_SUCCESS The PCI device is registered.\r | |
63 | @retval EFI_OUT_OF_RESOURCES No enough resource to register a new PCI device.\r | |
64 | @retval EFI_ALREADY_STARTED The device is already registered.\r | |
65 | **/\r | |
66 | EFI_STATUS\r | |
67 | RegisterPciDevice (\r | |
68 | IN UINTN VtdIndex,\r | |
69 | IN UINT16 Segment,\r | |
70 | IN VTD_SOURCE_ID SourceId,\r | |
f77d35c7 | 71 | IN UINT8 DeviceType,\r |
c049fc99 JY |
72 | IN BOOLEAN CheckExist\r |
73 | )\r | |
74 | {\r | |
f77d35c7 JY |
75 | PCI_DEVICE_INFORMATION *PciDeviceInfo;\r |
76 | VTD_SOURCE_ID *PciSourceId;\r | |
77 | UINTN PciDataIndex;\r | |
78 | UINTN Index;\r | |
79 | PCI_DEVICE_DATA *NewPciDeviceData;\r | |
80 | EDKII_PLATFORM_VTD_PCI_DEVICE_ID *PciDeviceId;\r | |
c049fc99 JY |
81 | \r |
82 | PciDeviceInfo = &mVtdUnitInformation[VtdIndex].PciDeviceInfo;\r | |
83 | \r | |
84 | if (PciDeviceInfo->IncludeAllFlag) {\r | |
85 | //\r | |
86 | // Do not register device in other VTD Unit\r | |
87 | //\r | |
88 | for (Index = 0; Index < VtdIndex; Index++) {\r | |
f77d35c7 JY |
89 | PciDataIndex = GetPciDataIndex (Index, Segment, SourceId);\r |
90 | if (PciDataIndex != (UINTN)-1) {\r | |
c049fc99 JY |
91 | DEBUG ((DEBUG_INFO, " RegisterPciDevice: PCI S%04x B%02x D%02x F%02x already registered by Other Vtd(%d)\n", Segment, SourceId.Bits.Bus, SourceId.Bits.Device, SourceId.Bits.Function, Index));\r |
92 | return EFI_SUCCESS;\r | |
93 | }\r | |
94 | }\r | |
95 | }\r | |
96 | \r | |
f77d35c7 JY |
97 | PciDataIndex = GetPciDataIndex (VtdIndex, Segment, SourceId);\r |
98 | if (PciDataIndex == (UINTN)-1) {\r | |
c049fc99 JY |
99 | //\r |
100 | // Register new\r | |
101 | //\r | |
102 | \r | |
f77d35c7 | 103 | if (PciDeviceInfo->PciDeviceDataNumber >= PciDeviceInfo->PciDeviceDataMaxNumber) {\r |
c049fc99 JY |
104 | //\r |
105 | // Reallocate\r | |
106 | //\r | |
f77d35c7 JY |
107 | NewPciDeviceData = AllocateZeroPool (sizeof(*NewPciDeviceData) * (PciDeviceInfo->PciDeviceDataMaxNumber + MAX_VTD_PCI_DATA_NUMBER));\r |
108 | if (NewPciDeviceData == NULL) {\r | |
c049fc99 JY |
109 | return EFI_OUT_OF_RESOURCES;\r |
110 | }\r | |
f77d35c7 JY |
111 | PciDeviceInfo->PciDeviceDataMaxNumber += MAX_VTD_PCI_DATA_NUMBER;\r |
112 | if (PciDeviceInfo->PciDeviceData != NULL) {\r | |
113 | CopyMem (NewPciDeviceData, PciDeviceInfo->PciDeviceData, sizeof(*NewPciDeviceData) * PciDeviceInfo->PciDeviceDataNumber);\r | |
114 | FreePool (PciDeviceInfo->PciDeviceData);\r | |
c049fc99 | 115 | }\r |
f77d35c7 | 116 | PciDeviceInfo->PciDeviceData = NewPciDeviceData;\r |
c049fc99 JY |
117 | }\r |
118 | \r | |
f77d35c7 | 119 | ASSERT (PciDeviceInfo->PciDeviceDataNumber < PciDeviceInfo->PciDeviceDataMaxNumber);\r |
c049fc99 | 120 | \r |
f77d35c7 JY |
121 | PciSourceId = &PciDeviceInfo->PciDeviceData[PciDeviceInfo->PciDeviceDataNumber].PciSourceId;\r |
122 | PciSourceId->Bits.Bus = SourceId.Bits.Bus;\r | |
123 | PciSourceId->Bits.Device = SourceId.Bits.Device;\r | |
124 | PciSourceId->Bits.Function = SourceId.Bits.Function;\r | |
c049fc99 JY |
125 | \r |
126 | DEBUG ((DEBUG_INFO, " RegisterPciDevice: PCI S%04x B%02x D%02x F%02x", Segment, SourceId.Bits.Bus, SourceId.Bits.Device, SourceId.Bits.Function));\r | |
f77d35c7 JY |
127 | \r |
128 | PciDeviceId = &PciDeviceInfo->PciDeviceData[PciDeviceInfo->PciDeviceDataNumber].PciDeviceId;\r | |
129 | if ((DeviceType == EFI_ACPI_DEVICE_SCOPE_ENTRY_TYPE_PCI_ENDPOINT) ||\r | |
130 | (DeviceType == EFI_ACPI_DEVICE_SCOPE_ENTRY_TYPE_PCI_BRIDGE)) {\r | |
131 | PciDeviceId->VendorId = PciSegmentRead16 (PCI_SEGMENT_LIB_ADDRESS(Segment, SourceId.Bits.Bus, SourceId.Bits.Device, SourceId.Bits.Function, PCI_VENDOR_ID_OFFSET));\r | |
132 | PciDeviceId->DeviceId = PciSegmentRead16 (PCI_SEGMENT_LIB_ADDRESS(Segment, SourceId.Bits.Bus, SourceId.Bits.Device, SourceId.Bits.Function, PCI_DEVICE_ID_OFFSET));\r | |
133 | PciDeviceId->RevisionId = PciSegmentRead8 (PCI_SEGMENT_LIB_ADDRESS(Segment, SourceId.Bits.Bus, SourceId.Bits.Device, SourceId.Bits.Function, PCI_REVISION_ID_OFFSET));\r | |
134 | \r | |
135 | DEBUG ((DEBUG_INFO, " (%04x:%04x:%02x", PciDeviceId->VendorId, PciDeviceId->DeviceId, PciDeviceId->RevisionId));\r | |
136 | \r | |
137 | if (DeviceType == EFI_ACPI_DEVICE_SCOPE_ENTRY_TYPE_PCI_ENDPOINT) {\r | |
138 | PciDeviceId->SubsystemVendorId = PciSegmentRead16 (PCI_SEGMENT_LIB_ADDRESS(Segment, SourceId.Bits.Bus, SourceId.Bits.Device, SourceId.Bits.Function, PCI_SUBSYSTEM_VENDOR_ID_OFFSET));\r | |
139 | PciDeviceId->SubsystemDeviceId = PciSegmentRead16 (PCI_SEGMENT_LIB_ADDRESS(Segment, SourceId.Bits.Bus, SourceId.Bits.Device, SourceId.Bits.Function, PCI_SUBSYSTEM_ID_OFFSET));\r | |
140 | DEBUG ((DEBUG_INFO, ":%04x:%04x", PciDeviceId->SubsystemVendorId, PciDeviceId->SubsystemDeviceId));\r | |
141 | }\r | |
142 | DEBUG ((DEBUG_INFO, ")"));\r | |
143 | }\r | |
144 | \r | |
145 | PciDeviceInfo->PciDeviceData[PciDeviceInfo->PciDeviceDataNumber].DeviceType = DeviceType;\r | |
146 | \r | |
147 | if ((DeviceType != EFI_ACPI_DEVICE_SCOPE_ENTRY_TYPE_PCI_ENDPOINT) &&\r | |
148 | (DeviceType != EFI_ACPI_DEVICE_SCOPE_ENTRY_TYPE_PCI_BRIDGE)) {\r | |
c049fc99 JY |
149 | DEBUG ((DEBUG_INFO, " (*)"));\r |
150 | }\r | |
151 | DEBUG ((DEBUG_INFO, "\n"));\r | |
f77d35c7 JY |
152 | \r |
153 | PciDeviceInfo->PciDeviceDataNumber++;\r | |
c049fc99 JY |
154 | } else {\r |
155 | if (CheckExist) {\r | |
156 | DEBUG ((DEBUG_INFO, " RegisterPciDevice: PCI S%04x B%02x D%02x F%02x already registered\n", Segment, SourceId.Bits.Bus, SourceId.Bits.Device, SourceId.Bits.Function));\r | |
157 | return EFI_ALREADY_STARTED;\r | |
158 | }\r | |
159 | }\r | |
160 | \r | |
161 | return EFI_SUCCESS;\r | |
162 | }\r | |
163 | \r | |
164 | /**\r | |
f77d35c7 | 165 | The scan bus callback function to register PCI device.\r |
c049fc99 | 166 | \r |
f77d35c7 | 167 | @param[in] Context The context of the callback.\r |
c049fc99 JY |
168 | @param[in] Segment The segment of the source.\r |
169 | @param[in] Bus The bus of the source.\r | |
f77d35c7 JY |
170 | @param[in] Device The device of the source.\r |
171 | @param[in] Function The function of the source.\r | |
c049fc99 | 172 | \r |
f77d35c7 | 173 | @retval EFI_SUCCESS The PCI device is registered.\r |
c049fc99 JY |
174 | **/\r |
175 | EFI_STATUS\r | |
f77d35c7 JY |
176 | EFIAPI\r |
177 | ScanBusCallbackRegisterPciDevice (\r | |
178 | IN VOID *Context,\r | |
c049fc99 | 179 | IN UINT16 Segment,\r |
f77d35c7 JY |
180 | IN UINT8 Bus,\r |
181 | IN UINT8 Device,\r | |
182 | IN UINT8 Function\r | |
183 | )\r | |
184 | {\r | |
185 | VTD_SOURCE_ID SourceId;\r | |
186 | UINTN VtdIndex;\r | |
187 | UINT8 BaseClass;\r | |
188 | UINT8 SubClass;\r | |
189 | UINT8 DeviceType;\r | |
190 | EFI_STATUS Status;\r | |
191 | \r | |
192 | VtdIndex = (UINTN)Context;\r | |
193 | SourceId.Bits.Bus = Bus;\r | |
194 | SourceId.Bits.Device = Device;\r | |
195 | SourceId.Bits.Function = Function;\r | |
196 | \r | |
197 | DeviceType = EFI_ACPI_DEVICE_SCOPE_ENTRY_TYPE_PCI_ENDPOINT;\r | |
198 | BaseClass = PciSegmentRead8 (PCI_SEGMENT_LIB_ADDRESS(Segment, Bus, Device, Function, PCI_CLASSCODE_OFFSET + 2));\r | |
199 | if (BaseClass == PCI_CLASS_BRIDGE) {\r | |
200 | SubClass = PciSegmentRead8 (PCI_SEGMENT_LIB_ADDRESS(Segment, Bus, Device, Function, PCI_CLASSCODE_OFFSET + 1));\r | |
201 | if (SubClass == PCI_CLASS_BRIDGE_P2P) {\r | |
202 | DeviceType = EFI_ACPI_DEVICE_SCOPE_ENTRY_TYPE_PCI_BRIDGE;\r | |
203 | }\r | |
204 | }\r | |
205 | \r | |
206 | Status = RegisterPciDevice (VtdIndex, Segment, SourceId, DeviceType, FALSE);\r | |
207 | return Status;\r | |
208 | }\r | |
209 | \r | |
210 | /**\r | |
211 | Scan PCI bus and invoke callback function for each PCI devices under the bus.\r | |
212 | \r | |
213 | @param[in] Context The context of the callback function.\r | |
214 | @param[in] Segment The segment of the source.\r | |
215 | @param[in] Bus The bus of the source.\r | |
216 | @param[in] Callback The callback function in PCI scan.\r | |
217 | \r | |
218 | @retval EFI_SUCCESS The PCI devices under the bus are scaned.\r | |
219 | **/\r | |
220 | EFI_STATUS\r | |
221 | ScanPciBus (\r | |
222 | IN VOID *Context,\r | |
223 | IN UINT16 Segment,\r | |
224 | IN UINT8 Bus,\r | |
225 | IN SCAN_BUS_FUNC_CALLBACK_FUNC Callback\r | |
c049fc99 JY |
226 | )\r |
227 | {\r | |
228 | UINT8 Device;\r | |
229 | UINT8 Function;\r | |
230 | UINT8 SecondaryBusNumber;\r | |
231 | UINT8 HeaderType;\r | |
232 | UINT8 BaseClass;\r | |
233 | UINT8 SubClass;\r | |
234 | UINT32 MaxFunction;\r | |
235 | UINT16 VendorID;\r | |
236 | UINT16 DeviceID;\r | |
237 | EFI_STATUS Status;\r | |
c049fc99 JY |
238 | \r |
239 | // Scan the PCI bus for devices\r | |
240 | for (Device = 0; Device < PCI_MAX_DEVICE + 1; Device++) {\r | |
241 | HeaderType = PciSegmentRead8 (PCI_SEGMENT_LIB_ADDRESS(Segment, Bus, Device, 0, PCI_HEADER_TYPE_OFFSET));\r | |
242 | MaxFunction = PCI_MAX_FUNC + 1;\r | |
243 | if ((HeaderType & HEADER_TYPE_MULTI_FUNCTION) == 0x00) {\r | |
244 | MaxFunction = 1;\r | |
245 | }\r | |
246 | for (Function = 0; Function < MaxFunction; Function++) {\r | |
247 | VendorID = PciSegmentRead16 (PCI_SEGMENT_LIB_ADDRESS(Segment, Bus, Device, Function, PCI_VENDOR_ID_OFFSET));\r | |
248 | DeviceID = PciSegmentRead16 (PCI_SEGMENT_LIB_ADDRESS(Segment, Bus, Device, Function, PCI_DEVICE_ID_OFFSET));\r | |
249 | if (VendorID == 0xFFFF && DeviceID == 0xFFFF) {\r | |
250 | continue;\r | |
251 | }\r | |
252 | \r | |
f77d35c7 | 253 | Status = Callback (Context, Segment, Bus, Device, Function);\r |
c049fc99 JY |
254 | if (EFI_ERROR (Status)) {\r |
255 | return Status;\r | |
256 | }\r | |
257 | \r | |
258 | BaseClass = PciSegmentRead8 (PCI_SEGMENT_LIB_ADDRESS(Segment, Bus, Device, Function, PCI_CLASSCODE_OFFSET + 2));\r | |
259 | if (BaseClass == PCI_CLASS_BRIDGE) {\r | |
260 | SubClass = PciSegmentRead8 (PCI_SEGMENT_LIB_ADDRESS(Segment, Bus, Device, Function, PCI_CLASSCODE_OFFSET + 1));\r | |
261 | if (SubClass == PCI_CLASS_BRIDGE_P2P) {\r | |
262 | SecondaryBusNumber = PciSegmentRead8 (PCI_SEGMENT_LIB_ADDRESS(Segment, Bus, Device, Function, PCI_BRIDGE_SECONDARY_BUS_REGISTER_OFFSET));\r | |
263 | DEBUG ((DEBUG_INFO," ScanPciBus: PCI bridge S%04x B%02x D%02x F%02x (SecondBus:%02x)\n", Segment, Bus, Device, Function, SecondaryBusNumber));\r | |
264 | if (SecondaryBusNumber != 0) {\r | |
f77d35c7 | 265 | Status = ScanPciBus (Context, Segment, SecondaryBusNumber, Callback);\r |
c049fc99 JY |
266 | if (EFI_ERROR (Status)) {\r |
267 | return Status;\r | |
268 | }\r | |
269 | }\r | |
270 | }\r | |
271 | }\r | |
272 | }\r | |
273 | }\r | |
274 | \r | |
275 | return EFI_SUCCESS;\r | |
276 | }\r | |
277 | \r | |
278 | /**\r | |
279 | Dump the PCI device information managed by this VTd engine.\r | |
280 | \r | |
281 | @param[in] VtdIndex The index of VTd engine.\r | |
282 | **/\r | |
283 | VOID\r | |
284 | DumpPciDeviceInfo (\r | |
285 | IN UINTN VtdIndex\r | |
286 | )\r | |
287 | {\r | |
288 | UINTN Index;\r | |
289 | \r | |
290 | DEBUG ((DEBUG_INFO,"PCI Device Information (Number 0x%x, IncludeAll - %d):\n",\r | |
f77d35c7 | 291 | mVtdUnitInformation[VtdIndex].PciDeviceInfo.PciDeviceDataNumber,\r |
c049fc99 JY |
292 | mVtdUnitInformation[VtdIndex].PciDeviceInfo.IncludeAllFlag\r |
293 | ));\r | |
f77d35c7 | 294 | for (Index = 0; Index < mVtdUnitInformation[VtdIndex].PciDeviceInfo.PciDeviceDataNumber; Index++) {\r |
c049fc99 JY |
295 | DEBUG ((DEBUG_INFO," S%04x B%02x D%02x F%02x\n",\r |
296 | mVtdUnitInformation[VtdIndex].Segment,\r | |
f77d35c7 JY |
297 | mVtdUnitInformation[VtdIndex].PciDeviceInfo.PciDeviceData[Index].PciSourceId.Bits.Bus,\r |
298 | mVtdUnitInformation[VtdIndex].PciDeviceInfo.PciDeviceData[Index].PciSourceId.Bits.Device,\r | |
299 | mVtdUnitInformation[VtdIndex].PciDeviceInfo.PciDeviceData[Index].PciSourceId.Bits.Function\r | |
c049fc99 JY |
300 | ));\r |
301 | }\r | |
302 | }\r | |
303 | \r | |
304 | /**\r | |
305 | Find the VTd index by the Segment and SourceId.\r | |
306 | \r | |
307 | @param[in] Segment The segment of the source.\r | |
308 | @param[in] SourceId The SourceId of the source.\r | |
309 | @param[out] ExtContextEntry The ExtContextEntry of the source.\r | |
310 | @param[out] ContextEntry The ContextEntry of the source.\r | |
311 | \r | |
f77d35c7 JY |
312 | @return The index of the VTd engine.\r |
313 | @retval (UINTN)-1 The VTd engine is not found.\r | |
c049fc99 JY |
314 | **/\r |
315 | UINTN\r | |
316 | FindVtdIndexByPciDevice (\r | |
317 | IN UINT16 Segment,\r | |
318 | IN VTD_SOURCE_ID SourceId,\r | |
319 | OUT VTD_EXT_CONTEXT_ENTRY **ExtContextEntry,\r | |
320 | OUT VTD_CONTEXT_ENTRY **ContextEntry\r | |
321 | )\r | |
322 | {\r | |
323 | UINTN VtdIndex;\r | |
324 | VTD_ROOT_ENTRY *RootEntry;\r | |
325 | VTD_CONTEXT_ENTRY *ContextEntryTable;\r | |
326 | VTD_CONTEXT_ENTRY *ThisContextEntry;\r | |
327 | VTD_EXT_ROOT_ENTRY *ExtRootEntry;\r | |
328 | VTD_EXT_CONTEXT_ENTRY *ExtContextEntryTable;\r | |
329 | VTD_EXT_CONTEXT_ENTRY *ThisExtContextEntry;\r | |
f77d35c7 | 330 | UINTN PciDataIndex;\r |
c049fc99 JY |
331 | \r |
332 | for (VtdIndex = 0; VtdIndex < mVtdUnitNumber; VtdIndex++) {\r | |
333 | if (Segment != mVtdUnitInformation[VtdIndex].Segment) {\r | |
334 | continue;\r | |
335 | }\r | |
336 | \r | |
f77d35c7 JY |
337 | PciDataIndex = GetPciDataIndex (VtdIndex, Segment, SourceId);\r |
338 | if (PciDataIndex == (UINTN)-1) {\r | |
c049fc99 JY |
339 | continue;\r |
340 | }\r | |
341 | \r | |
342 | // DEBUG ((DEBUG_INFO,"FindVtdIndex(0x%x) for S%04x B%02x D%02x F%02x\n", VtdIndex, Segment, SourceId.Bits.Bus, SourceId.Bits.Device, SourceId.Bits.Function));\r | |
343 | \r | |
344 | if (mVtdUnitInformation[VtdIndex].ExtRootEntryTable != 0) {\r | |
345 | ExtRootEntry = &mVtdUnitInformation[VtdIndex].ExtRootEntryTable[SourceId.Index.RootIndex];\r | |
76c6f69c | 346 | ExtContextEntryTable = (VTD_EXT_CONTEXT_ENTRY *)(UINTN)VTD_64BITS_ADDRESS(ExtRootEntry->Bits.LowerContextTablePointerLo, ExtRootEntry->Bits.LowerContextTablePointerHi) ;\r |
c049fc99 JY |
347 | ThisExtContextEntry = &ExtContextEntryTable[SourceId.Index.ContextIndex];\r |
348 | if (ThisExtContextEntry->Bits.AddressWidth == 0) {\r | |
349 | continue;\r | |
350 | }\r | |
351 | *ExtContextEntry = ThisExtContextEntry;\r | |
352 | *ContextEntry = NULL;\r | |
353 | } else {\r | |
354 | RootEntry = &mVtdUnitInformation[VtdIndex].RootEntryTable[SourceId.Index.RootIndex];\r | |
76c6f69c | 355 | ContextEntryTable = (VTD_CONTEXT_ENTRY *)(UINTN)VTD_64BITS_ADDRESS(RootEntry->Bits.ContextTablePointerLo, RootEntry->Bits.ContextTablePointerHi) ;\r |
c049fc99 JY |
356 | ThisContextEntry = &ContextEntryTable[SourceId.Index.ContextIndex];\r |
357 | if (ThisContextEntry->Bits.AddressWidth == 0) {\r | |
358 | continue;\r | |
359 | }\r | |
360 | *ExtContextEntry = NULL;\r | |
361 | *ContextEntry = ThisContextEntry;\r | |
362 | }\r | |
363 | \r | |
364 | return VtdIndex;\r | |
365 | }\r | |
366 | \r | |
367 | return (UINTN)-1;\r | |
368 | }\r | |
369 | \r |