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1 | /** @file\r |
2 | A non-transitional driver for VirtIo 1.0 PCI devices.\r | |
3 | \r | |
4 | Copyright (C) 2016, Red Hat, Inc.\r | |
5 | \r | |
6 | This program and the accompanying materials are licensed and made available\r | |
7 | under the terms and conditions of the BSD License which accompanies this\r | |
8 | distribution. The full text of the license may be found at\r | |
9 | http://opensource.org/licenses/bsd-license.php\r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT\r | |
12 | WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | **/\r | |
14 | \r | |
15 | #include <IndustryStandard/Pci.h>\r | |
16 | #include <IndustryStandard/Virtio.h>\r | |
17 | #include <Protocol/PciIo.h>\r | |
18 | #include <Protocol/VirtioDevice.h>\r | |
19 | #include <Library/BaseMemoryLib.h>\r | |
20 | #include <Library/DebugLib.h>\r | |
21 | #include <Library/MemoryAllocationLib.h>\r | |
22 | #include <Library/UefiBootServicesTableLib.h>\r | |
23 | #include <Library/UefiLib.h>\r | |
24 | \r | |
25 | #include "Virtio10.h"\r | |
26 | \r | |
27 | \r | |
28 | //\r | |
29 | // Utility functions\r | |
30 | //\r | |
31 | \r | |
32 | /**\r | |
33 | Transfer data between the caller and a register in a virtio-1.0 register\r | |
34 | block.\r | |
35 | \r | |
36 | @param[in] PciIo The EFI_PCI_IO_PROTOCOL instance that represents\r | |
37 | the device.\r | |
38 | \r | |
39 | @param[in] Config The "fat pointer" structure that identifies the\r | |
40 | register block to access.\r | |
41 | \r | |
42 | @param[in] Write TRUE if the register should be written, FALSE if\r | |
43 | the register should be read.\r | |
44 | \r | |
45 | @param[in] FieldOffset The offset of the register within the register\r | |
46 | block.\r | |
47 | \r | |
48 | @param[in] FieldSize The size of the register within the register\r | |
49 | block. Can be one of 1, 2, 4 and 8. Accesses to\r | |
50 | 8-byte registers are broken up into two 4-byte\r | |
51 | accesses.\r | |
52 | \r | |
53 | @param[in,out] Buffer When Write is TRUE, the register is written with\r | |
54 | data from Buffer. When Write is FALSE, the caller\r | |
55 | receives the register value into Buffer.\r | |
56 | \r | |
57 | @retval EFI_SUCCESS Register access successful.\r | |
58 | \r | |
59 | @retval EFI_INVALID_PARAMETER The register block pointed-to by Config\r | |
60 | doesn't exist; or FieldOffset and FieldSize\r | |
61 | would overflow the register block; or\r | |
62 | FieldSize is invalid.\r | |
63 | \r | |
64 | @return Error codes from\r | |
65 | EFI_PCI_IO_PROTOCOL.(Io|Mem).(Read|Write)\r | |
66 | member functions.\r | |
67 | **/\r | |
68 | STATIC\r | |
69 | EFI_STATUS\r | |
70 | Virtio10Transfer (\r | |
71 | IN EFI_PCI_IO_PROTOCOL *PciIo,\r | |
72 | IN VIRTIO_1_0_CONFIG *Config,\r | |
73 | IN BOOLEAN Write,\r | |
74 | IN UINTN FieldOffset,\r | |
75 | IN UINTN FieldSize,\r | |
76 | IN OUT VOID *Buffer\r | |
77 | )\r | |
78 | {\r | |
79 | UINTN Count;\r | |
80 | EFI_PCI_IO_PROTOCOL_WIDTH Width;\r | |
81 | EFI_PCI_IO_PROTOCOL_ACCESS *BarType;\r | |
82 | EFI_PCI_IO_PROTOCOL_IO_MEM Access;\r | |
83 | \r | |
84 | if (!Config->Exists ||\r | |
85 | FieldSize > Config->Length ||\r | |
86 | FieldOffset > Config->Length - FieldSize) {\r | |
87 | return EFI_INVALID_PARAMETER;\r | |
88 | }\r | |
89 | \r | |
90 | Count = 1;\r | |
91 | switch (FieldSize) {\r | |
92 | case 1:\r | |
93 | Width = EfiPciIoWidthUint8;\r | |
94 | break;\r | |
95 | \r | |
96 | case 2:\r | |
97 | Width = EfiPciIoWidthUint16;\r | |
98 | break;\r | |
99 | \r | |
100 | case 8:\r | |
101 | Count = 2;\r | |
102 | //\r | |
103 | // fall through\r | |
104 | //\r | |
105 | \r | |
106 | case 4:\r | |
107 | Width = EfiPciIoWidthUint32;\r | |
108 | break;\r | |
109 | \r | |
110 | default:\r | |
111 | return EFI_INVALID_PARAMETER;\r | |
112 | }\r | |
113 | \r | |
114 | BarType = (Config->BarType == Virtio10BarTypeMem) ? &PciIo->Mem : &PciIo->Io;\r | |
115 | Access = Write ? BarType->Write : BarType->Read;\r | |
116 | \r | |
117 | return Access (PciIo, Width, Config->Bar, Config->Offset + FieldOffset,\r | |
118 | Count, Buffer);\r | |
119 | }\r | |
120 | \r | |
121 | \r | |
122 | /**\r | |
123 | Determine if a PCI BAR is IO or MMIO.\r | |
124 | \r | |
125 | @param[in] PciIo The EFI_PCI_IO_PROTOCOL instance that represents the\r | |
126 | device.\r | |
127 | \r | |
128 | @param[in] BarIndex The number of the BAR whose type the caller is\r | |
129 | interested in.\r | |
130 | \r | |
131 | @param[out] BarType On output, a VIRTIO_1_0_BAR_TYPE value that gives the\r | |
132 | type of the BAR.\r | |
133 | \r | |
134 | @retval EFI_SUCCESS The BAR type has been recognized and stored in\r | |
135 | BarType.\r | |
136 | \r | |
137 | @retval EFI_UNSUPPORTED The BAR type couldn't be identified.\r | |
138 | \r | |
139 | @return Error codes from\r | |
140 | EFI_PCI_IO_PROTOCOL.GetBarAttributes().\r | |
141 | **/\r | |
142 | STATIC\r | |
143 | EFI_STATUS\r | |
144 | GetBarType (\r | |
145 | IN EFI_PCI_IO_PROTOCOL *PciIo,\r | |
146 | IN UINT8 BarIndex,\r | |
147 | OUT VIRTIO_1_0_BAR_TYPE *BarType\r | |
148 | )\r | |
149 | {\r | |
150 | EFI_STATUS Status;\r | |
151 | VOID *Resources;\r | |
152 | \r | |
153 | Status = PciIo->GetBarAttributes (PciIo, BarIndex, NULL, &Resources);\r | |
154 | if (EFI_ERROR (Status)) {\r | |
155 | return Status;\r | |
156 | }\r | |
157 | \r | |
158 | Status = EFI_UNSUPPORTED;\r | |
159 | \r | |
160 | if (*(UINT8 *)Resources == ACPI_QWORD_ADDRESS_SPACE_DESCRIPTOR) {\r | |
161 | EFI_ACPI_QWORD_ADDRESS_SPACE_DESCRIPTOR *Descriptor;\r | |
162 | \r | |
163 | Descriptor = Resources;\r | |
164 | switch (Descriptor->ResType) {\r | |
165 | case ACPI_ADDRESS_SPACE_TYPE_MEM:\r | |
166 | *BarType = Virtio10BarTypeMem;\r | |
167 | Status = EFI_SUCCESS;\r | |
168 | break;\r | |
169 | \r | |
170 | case ACPI_ADDRESS_SPACE_TYPE_IO:\r | |
171 | *BarType = Virtio10BarTypeIo;\r | |
172 | Status = EFI_SUCCESS;\r | |
173 | break;\r | |
174 | \r | |
175 | default:\r | |
176 | break;\r | |
177 | }\r | |
178 | }\r | |
179 | \r | |
180 | FreePool (Resources);\r | |
181 | return Status;\r | |
182 | }\r | |
183 | \r | |
184 | \r | |
185 | /**\r | |
186 | Read a slice from PCI config space at the given offset, then advance the\r | |
187 | offset.\r | |
188 | \r | |
189 | @param [in] PciIo The EFI_PCI_IO_PROTOCOL instance that represents the\r | |
190 | device.\r | |
191 | \r | |
192 | @param [in,out] Offset On input, the offset in PCI config space to start\r | |
193 | reading from. On output, the offset of the first byte\r | |
194 | that was not read. On error, Offset is not modified.\r | |
195 | \r | |
196 | @param [in] Size The number of bytes to read.\r | |
197 | \r | |
198 | @param [out] Buffer On output, the bytes read from PCI config space are\r | |
199 | stored in this object.\r | |
200 | \r | |
201 | @retval EFI_SUCCESS Size bytes have been transferred from PCI config space\r | |
202 | (from Offset) to Buffer, and Offset has been incremented\r | |
203 | by Size.\r | |
204 | \r | |
205 | @return Error codes from PciIo->Pci.Read().\r | |
206 | **/\r | |
207 | STATIC\r | |
208 | EFI_STATUS\r | |
209 | ReadConfigSpace (\r | |
210 | IN EFI_PCI_IO_PROTOCOL *PciIo,\r | |
211 | IN OUT UINT32 *Offset,\r | |
212 | IN UINTN Size,\r | |
213 | OUT VOID *Buffer\r | |
214 | )\r | |
215 | {\r | |
216 | EFI_STATUS Status;\r | |
217 | \r | |
218 | Status = PciIo->Pci.Read (PciIo, EfiPciIoWidthUint8, *Offset, Size, Buffer);\r | |
219 | if (EFI_ERROR (Status)) {\r | |
220 | return Status;\r | |
221 | }\r | |
222 | *Offset += (UINT32)Size;\r | |
223 | return EFI_SUCCESS;\r | |
224 | }\r | |
225 | \r | |
226 | \r | |
227 | /*\r | |
228 | Traverse the PCI capabilities list of a virtio-1.0 device, and capture the\r | |
229 | locations of the interesting virtio-1.0 register blocks.\r | |
230 | \r | |
231 | @param[in,out] Device The VIRTIO_1_0_DEV structure that identifies\r | |
232 | the device. On input, the caller is responsible\r | |
233 | that the Device->PciIo member be live, and that\r | |
234 | the CommonConfig, NotifyConfig,\r | |
235 | NotifyOffsetMultiplier and SpecificConfig\r | |
236 | members be zeroed. On output, said members\r | |
237 | will have been updated from the PCI\r | |
238 | capabilities found.\r | |
239 | \r | |
240 | @param[in] CapabilityPtr The offset of the first capability in PCI\r | |
241 | config space, taken from the standard PCI\r | |
242 | device header.\r | |
243 | \r | |
244 | @retval EFI_SUCCESS Traversal successful.\r | |
245 | \r | |
246 | @return Error codes from the ReadConfigSpace() and GetBarType()\r | |
247 | helper functions.\r | |
248 | */\r | |
249 | STATIC\r | |
250 | EFI_STATUS\r | |
251 | ParseCapabilities (\r | |
252 | IN OUT VIRTIO_1_0_DEV *Device,\r | |
253 | IN UINT8 CapabilityPtr\r | |
254 | )\r | |
255 | {\r | |
256 | UINT32 Offset;\r | |
257 | VIRTIO_PCI_CAP_LINK CapLink;\r | |
258 | \r | |
259 | for (Offset = CapabilityPtr & 0xFC;\r | |
260 | Offset > 0;\r | |
261 | Offset = CapLink.CapNext & 0xFC\r | |
262 | ) {\r | |
263 | EFI_STATUS Status;\r | |
264 | UINT8 CapLen;\r | |
265 | VIRTIO_PCI_CAP VirtIoCap;\r | |
266 | VIRTIO_1_0_CONFIG *ParsedConfig;\r | |
267 | \r | |
268 | //\r | |
269 | // Read capability identifier and link to next capability.\r | |
270 | //\r | |
271 | Status = ReadConfigSpace (Device->PciIo, &Offset, sizeof CapLink,\r | |
272 | &CapLink);\r | |
273 | if (EFI_ERROR (Status)) {\r | |
274 | return Status;\r | |
275 | }\r | |
276 | if (CapLink.CapId != 0x09) {\r | |
277 | //\r | |
278 | // Not a vendor-specific capability, move to the next one.\r | |
279 | //\r | |
280 | continue;\r | |
281 | }\r | |
282 | \r | |
283 | //\r | |
284 | // Big enough to accommodate a VIRTIO_PCI_CAP structure?\r | |
285 | //\r | |
286 | Status = ReadConfigSpace (Device->PciIo, &Offset, sizeof CapLen, &CapLen);\r | |
287 | if (EFI_ERROR (Status)) {\r | |
288 | return Status;\r | |
289 | }\r | |
290 | if (CapLen < sizeof CapLink + sizeof CapLen + sizeof VirtIoCap) {\r | |
291 | //\r | |
292 | // Too small, move to next.\r | |
293 | //\r | |
294 | continue;\r | |
295 | }\r | |
296 | \r | |
297 | //\r | |
298 | // Read interesting part of capability.\r | |
299 | //\r | |
300 | Status = ReadConfigSpace (Device->PciIo, &Offset, sizeof VirtIoCap,\r | |
301 | &VirtIoCap);\r | |
302 | if (EFI_ERROR (Status)) {\r | |
303 | return Status;\r | |
304 | }\r | |
305 | switch (VirtIoCap.ConfigType) {\r | |
306 | case VIRTIO_PCI_CAP_COMMON_CFG:\r | |
307 | ParsedConfig = &Device->CommonConfig;\r | |
308 | break;\r | |
309 | case VIRTIO_PCI_CAP_NOTIFY_CFG:\r | |
310 | ParsedConfig = &Device->NotifyConfig;\r | |
311 | break;\r | |
312 | case VIRTIO_PCI_CAP_DEVICE_CFG:\r | |
313 | ParsedConfig = &Device->SpecificConfig;\r | |
314 | break;\r | |
315 | default:\r | |
316 | //\r | |
317 | // Capability is not interesting.\r | |
318 | //\r | |
319 | continue;\r | |
320 | }\r | |
321 | \r | |
322 | //\r | |
323 | // Save the location of the register block into ParsedConfig.\r | |
324 | //\r | |
325 | Status = GetBarType (Device->PciIo, VirtIoCap.Bar, &ParsedConfig->BarType);\r | |
326 | if (EFI_ERROR (Status)) {\r | |
327 | return Status;\r | |
328 | }\r | |
329 | ParsedConfig->Bar = VirtIoCap.Bar;\r | |
330 | ParsedConfig->Offset = VirtIoCap.Offset;\r | |
331 | ParsedConfig->Length = VirtIoCap.Length;\r | |
332 | \r | |
333 | if (VirtIoCap.ConfigType == VIRTIO_PCI_CAP_NOTIFY_CFG) {\r | |
334 | //\r | |
335 | // This capability has an additional field called NotifyOffsetMultiplier;\r | |
336 | // parse it too.\r | |
337 | //\r | |
338 | if (CapLen < sizeof CapLink + sizeof CapLen + sizeof VirtIoCap +\r | |
339 | sizeof Device->NotifyOffsetMultiplier) {\r | |
340 | //\r | |
341 | // Too small, move to next.\r | |
342 | //\r | |
343 | continue;\r | |
344 | }\r | |
345 | \r | |
346 | Status = ReadConfigSpace (Device->PciIo, &Offset,\r | |
347 | sizeof Device->NotifyOffsetMultiplier,\r | |
348 | &Device->NotifyOffsetMultiplier);\r | |
349 | if (EFI_ERROR (Status)) {\r | |
350 | return Status;\r | |
351 | }\r | |
352 | }\r | |
353 | \r | |
354 | //\r | |
355 | // Capability parsed successfully.\r | |
356 | //\r | |
357 | ParsedConfig->Exists = TRUE;\r | |
358 | }\r | |
359 | \r | |
360 | return EFI_SUCCESS;\r | |
361 | }\r | |
362 | \r | |
363 | \r | |
364 | /**\r | |
365 | Accumulate the BAR type of a virtio-1.0 register block into a UINT64\r | |
366 | attribute map, such that the latter is suitable for enabling IO / MMIO\r | |
367 | decoding with EFI_PCI_IO_PROTOCOL.Attributes().\r | |
368 | \r | |
369 | @param[in] Config The "fat pointer" structure that identifies the\r | |
370 | register block. It is allowed for the register\r | |
371 | block not to exist.\r | |
372 | \r | |
373 | @param[in,out] Attributes On output, if the register block exists,\r | |
374 | EFI_PCI_IO_ATTRIBUTE_MEMORY or\r | |
375 | EFI_PCI_IO_ATTRIBUTE_IO is OR-ed into Attributes,\r | |
376 | according to the register block's BAR type.\r | |
377 | **/\r | |
378 | STATIC\r | |
379 | VOID\r | |
380 | UpdateAttributes (\r | |
381 | IN VIRTIO_1_0_CONFIG *Config,\r | |
382 | IN OUT UINT64 *Attributes\r | |
383 | )\r | |
384 | {\r | |
385 | if (Config->Exists) {\r | |
386 | *Attributes |= (Config->BarType == Virtio10BarTypeMem) ?\r | |
387 | EFI_PCI_IO_ATTRIBUTE_MEMORY:\r | |
388 | EFI_PCI_IO_ATTRIBUTE_IO;\r | |
389 | }\r | |
390 | }\r | |
391 | \r | |
392 | \r | |
393 | //\r | |
394 | // VIRTIO_DEVICE_PROTOCOL member functions\r | |
395 | //\r | |
396 | \r | |
397 | STATIC\r | |
398 | EFI_STATUS\r | |
399 | EFIAPI\r | |
400 | Virtio10GetDeviceFeatures (\r | |
401 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
402 | OUT UINT64 *DeviceFeatures\r | |
403 | )\r | |
404 | {\r | |
405 | VIRTIO_1_0_DEV *Dev;\r | |
406 | UINT32 Selector;\r | |
407 | UINT32 Features32[2];\r | |
408 | \r | |
409 | Dev = VIRTIO_1_0_FROM_VIRTIO_DEVICE (This);\r | |
410 | \r | |
411 | for (Selector = 0; Selector < 2; ++Selector) {\r | |
412 | EFI_STATUS Status;\r | |
413 | \r | |
414 | //\r | |
415 | // Select the low or high half of the features.\r | |
416 | //\r | |
417 | Status = Virtio10Transfer (Dev->PciIo, &Dev->CommonConfig, TRUE,\r | |
418 | OFFSET_OF (VIRTIO_PCI_COMMON_CFG, DeviceFeatureSelect),\r | |
419 | sizeof Selector, &Selector);\r | |
420 | if (EFI_ERROR (Status)) {\r | |
421 | return Status;\r | |
422 | }\r | |
423 | \r | |
424 | //\r | |
425 | // Fetch that half.\r | |
426 | //\r | |
427 | Status = Virtio10Transfer (Dev->PciIo, &Dev->CommonConfig, FALSE,\r | |
428 | OFFSET_OF (VIRTIO_PCI_COMMON_CFG, DeviceFeature),\r | |
429 | sizeof Features32[Selector], &Features32[Selector]);\r | |
430 | if (EFI_ERROR (Status)) {\r | |
431 | return Status;\r | |
432 | }\r | |
433 | }\r | |
434 | \r | |
435 | *DeviceFeatures = LShiftU64 (Features32[1], 32) | Features32[0];\r | |
436 | return EFI_SUCCESS;\r | |
437 | }\r | |
438 | \r | |
439 | \r | |
440 | STATIC\r | |
441 | EFI_STATUS\r | |
442 | EFIAPI\r | |
443 | Virtio10SetGuestFeatures (\r | |
444 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
445 | IN UINT64 Features\r | |
446 | )\r | |
447 | {\r | |
448 | VIRTIO_1_0_DEV *Dev;\r | |
449 | UINT32 Selector;\r | |
450 | UINT32 Features32[2];\r | |
451 | \r | |
452 | Dev = VIRTIO_1_0_FROM_VIRTIO_DEVICE (This);\r | |
453 | \r | |
454 | Features32[0] = (UINT32)Features;\r | |
455 | Features32[1] = (UINT32)RShiftU64 (Features, 32);\r | |
456 | \r | |
457 | for (Selector = 0; Selector < 2; ++Selector) {\r | |
458 | EFI_STATUS Status;\r | |
459 | \r | |
460 | //\r | |
461 | // Select the low or high half of the features.\r | |
462 | //\r | |
463 | Status = Virtio10Transfer (Dev->PciIo, &Dev->CommonConfig, TRUE,\r | |
464 | OFFSET_OF (VIRTIO_PCI_COMMON_CFG, DriverFeatureSelect),\r | |
465 | sizeof Selector, &Selector);\r | |
466 | if (EFI_ERROR (Status)) {\r | |
467 | return Status;\r | |
468 | }\r | |
469 | \r | |
470 | //\r | |
471 | // Write that half.\r | |
472 | //\r | |
473 | Status = Virtio10Transfer (Dev->PciIo, &Dev->CommonConfig, TRUE,\r | |
474 | OFFSET_OF (VIRTIO_PCI_COMMON_CFG, DriverFeature),\r | |
475 | sizeof Features32[Selector], &Features32[Selector]);\r | |
476 | if (EFI_ERROR (Status)) {\r | |
477 | return Status;\r | |
478 | }\r | |
479 | }\r | |
480 | \r | |
481 | return EFI_SUCCESS;\r | |
482 | }\r | |
483 | \r | |
484 | \r | |
485 | STATIC\r | |
486 | EFI_STATUS\r | |
487 | EFIAPI\r | |
488 | Virtio10SetQueueAddress (\r | |
489 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
490 | IN VRING *Ring\r | |
491 | )\r | |
492 | {\r | |
493 | VIRTIO_1_0_DEV *Dev;\r | |
494 | EFI_STATUS Status;\r | |
495 | UINT64 Address;\r | |
496 | UINT16 Enable;\r | |
497 | \r | |
498 | Dev = VIRTIO_1_0_FROM_VIRTIO_DEVICE (This);\r | |
499 | \r | |
500 | Address = (UINTN)Ring->Desc;\r | |
501 | Status = Virtio10Transfer (Dev->PciIo, &Dev->CommonConfig, TRUE,\r | |
502 | OFFSET_OF (VIRTIO_PCI_COMMON_CFG, QueueDesc),\r | |
503 | sizeof Address, &Address);\r | |
504 | if (EFI_ERROR (Status)) {\r | |
505 | return Status;\r | |
506 | }\r | |
507 | \r | |
508 | Address = (UINTN)Ring->Avail.Flags;\r | |
509 | Status = Virtio10Transfer (Dev->PciIo, &Dev->CommonConfig, TRUE,\r | |
510 | OFFSET_OF (VIRTIO_PCI_COMMON_CFG, QueueAvail),\r | |
511 | sizeof Address, &Address);\r | |
512 | if (EFI_ERROR (Status)) {\r | |
513 | return Status;\r | |
514 | }\r | |
515 | \r | |
516 | Address = (UINTN)Ring->Used.Flags;\r | |
517 | Status = Virtio10Transfer (Dev->PciIo, &Dev->CommonConfig, TRUE,\r | |
518 | OFFSET_OF (VIRTIO_PCI_COMMON_CFG, QueueUsed),\r | |
519 | sizeof Address, &Address);\r | |
520 | if (EFI_ERROR (Status)) {\r | |
521 | return Status;\r | |
522 | }\r | |
523 | \r | |
524 | Enable = 1;\r | |
525 | Status = Virtio10Transfer (Dev->PciIo, &Dev->CommonConfig, TRUE,\r | |
526 | OFFSET_OF (VIRTIO_PCI_COMMON_CFG, QueueEnable),\r | |
527 | sizeof Enable, &Enable);\r | |
528 | return Status;\r | |
529 | }\r | |
530 | \r | |
531 | \r | |
532 | STATIC\r | |
533 | EFI_STATUS\r | |
534 | EFIAPI\r | |
535 | Virtio10SetQueueSel (\r | |
536 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
537 | IN UINT16 Index\r | |
538 | )\r | |
539 | {\r | |
540 | VIRTIO_1_0_DEV *Dev;\r | |
541 | EFI_STATUS Status;\r | |
542 | \r | |
543 | Dev = VIRTIO_1_0_FROM_VIRTIO_DEVICE (This);\r | |
544 | \r | |
545 | Status = Virtio10Transfer (Dev->PciIo, &Dev->CommonConfig, TRUE,\r | |
546 | OFFSET_OF (VIRTIO_PCI_COMMON_CFG, QueueSelect),\r | |
547 | sizeof Index, &Index);\r | |
548 | return Status;\r | |
549 | }\r | |
550 | \r | |
551 | \r | |
552 | STATIC\r | |
553 | EFI_STATUS\r | |
554 | EFIAPI\r | |
555 | Virtio10SetQueueNotify (\r | |
556 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
557 | IN UINT16 Index\r | |
558 | )\r | |
559 | {\r | |
560 | VIRTIO_1_0_DEV *Dev;\r | |
561 | EFI_STATUS Status;\r | |
562 | UINT16 SavedQueueSelect;\r | |
563 | UINT16 NotifyOffset;\r | |
564 | \r | |
565 | Dev = VIRTIO_1_0_FROM_VIRTIO_DEVICE (This);\r | |
566 | \r | |
567 | //\r | |
568 | // Read NotifyOffset first. NotifyOffset is queue specific, so we have\r | |
569 | // to stash & restore the current queue selector around it.\r | |
570 | //\r | |
571 | // So, start with saving the current queue selector.\r | |
572 | //\r | |
573 | Status = Virtio10Transfer (Dev->PciIo, &Dev->CommonConfig, FALSE,\r | |
574 | OFFSET_OF (VIRTIO_PCI_COMMON_CFG, QueueSelect),\r | |
575 | sizeof SavedQueueSelect, &SavedQueueSelect);\r | |
576 | if (EFI_ERROR (Status)) {\r | |
577 | return Status;\r | |
578 | }\r | |
579 | \r | |
580 | //\r | |
581 | // Select the requested queue.\r | |
582 | //\r | |
583 | Status = Virtio10Transfer (Dev->PciIo, &Dev->CommonConfig, TRUE,\r | |
584 | OFFSET_OF (VIRTIO_PCI_COMMON_CFG, QueueSelect),\r | |
585 | sizeof Index, &Index);\r | |
586 | if (EFI_ERROR (Status)) {\r | |
587 | return Status;\r | |
588 | }\r | |
589 | \r | |
590 | //\r | |
591 | // Read the QueueNotifyOff field.\r | |
592 | //\r | |
593 | Status = Virtio10Transfer (Dev->PciIo, &Dev->CommonConfig, FALSE,\r | |
594 | OFFSET_OF (VIRTIO_PCI_COMMON_CFG, QueueNotifyOff),\r | |
595 | sizeof NotifyOffset, &NotifyOffset);\r | |
596 | if (EFI_ERROR (Status)) {\r | |
597 | return Status;\r | |
598 | }\r | |
599 | \r | |
600 | //\r | |
601 | // Re-select the original queue.\r | |
602 | //\r | |
603 | Status = Virtio10Transfer (Dev->PciIo, &Dev->CommonConfig, TRUE,\r | |
604 | OFFSET_OF (VIRTIO_PCI_COMMON_CFG, QueueSelect),\r | |
605 | sizeof SavedQueueSelect, &SavedQueueSelect);\r | |
606 | if (EFI_ERROR (Status)) {\r | |
607 | return Status;\r | |
608 | }\r | |
609 | \r | |
610 | //\r | |
611 | // We can now kick the queue.\r | |
612 | //\r | |
613 | Status = Virtio10Transfer (Dev->PciIo, &Dev->NotifyConfig, TRUE,\r | |
614 | NotifyOffset * Dev->NotifyOffsetMultiplier,\r | |
615 | sizeof Index, &Index);\r | |
616 | return Status;\r | |
617 | }\r | |
618 | \r | |
619 | \r | |
620 | STATIC\r | |
621 | EFI_STATUS\r | |
622 | EFIAPI\r | |
623 | Virtio10SetQueueAlign (\r | |
624 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
625 | IN UINT32 Alignment\r | |
626 | )\r | |
627 | {\r | |
628 | return (Alignment == EFI_PAGE_SIZE) ? EFI_SUCCESS : EFI_UNSUPPORTED;\r | |
629 | }\r | |
630 | \r | |
631 | \r | |
632 | STATIC\r | |
633 | EFI_STATUS\r | |
634 | EFIAPI\r | |
635 | Virtio10SetPageSize (\r | |
636 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
637 | IN UINT32 PageSize\r | |
638 | )\r | |
639 | {\r | |
640 | return (PageSize == EFI_PAGE_SIZE) ? EFI_SUCCESS : EFI_UNSUPPORTED;\r | |
641 | }\r | |
642 | \r | |
643 | \r | |
644 | STATIC\r | |
645 | EFI_STATUS\r | |
646 | EFIAPI\r | |
647 | Virtio10GetQueueNumMax (\r | |
648 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
649 | OUT UINT16 *QueueNumMax\r | |
650 | )\r | |
651 | {\r | |
652 | VIRTIO_1_0_DEV *Dev;\r | |
653 | EFI_STATUS Status;\r | |
654 | \r | |
655 | Dev = VIRTIO_1_0_FROM_VIRTIO_DEVICE (This);\r | |
656 | \r | |
657 | Status = Virtio10Transfer (Dev->PciIo, &Dev->CommonConfig, FALSE,\r | |
658 | OFFSET_OF (VIRTIO_PCI_COMMON_CFG, QueueSize),\r | |
659 | sizeof *QueueNumMax, QueueNumMax);\r | |
660 | return Status;\r | |
661 | }\r | |
662 | \r | |
663 | \r | |
664 | STATIC\r | |
665 | EFI_STATUS\r | |
666 | EFIAPI\r | |
667 | Virtio10SetQueueNum (\r | |
668 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
669 | IN UINT16 QueueSize\r | |
670 | )\r | |
671 | {\r | |
672 | EFI_STATUS Status;\r | |
673 | UINT16 CurrentSize;\r | |
674 | \r | |
675 | //\r | |
676 | // This member function is required for VirtIo MMIO, and a no-op in\r | |
677 | // VirtIo PCI 0.9.5. In VirtIo 1.0, drivers can theoretically use this\r | |
678 | // member to reduce memory consumption, but none of our drivers do. So\r | |
679 | // just check that they set the size that is already in effect.\r | |
680 | //\r | |
681 | Status = Virtio10GetQueueNumMax (This, &CurrentSize);\r | |
682 | if (EFI_ERROR (Status)) {\r | |
683 | return Status;\r | |
684 | }\r | |
685 | return (CurrentSize == QueueSize) ? EFI_SUCCESS : EFI_UNSUPPORTED;\r | |
686 | }\r | |
687 | \r | |
688 | \r | |
689 | STATIC\r | |
690 | EFI_STATUS\r | |
691 | EFIAPI\r | |
692 | Virtio10GetDeviceStatus (\r | |
693 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
694 | OUT UINT8 *DeviceStatus\r | |
695 | )\r | |
696 | {\r | |
697 | VIRTIO_1_0_DEV *Dev;\r | |
698 | EFI_STATUS Status;\r | |
699 | \r | |
700 | Dev = VIRTIO_1_0_FROM_VIRTIO_DEVICE (This);\r | |
701 | \r | |
702 | Status = Virtio10Transfer (Dev->PciIo, &Dev->CommonConfig, FALSE,\r | |
703 | OFFSET_OF (VIRTIO_PCI_COMMON_CFG, DeviceStatus),\r | |
704 | sizeof *DeviceStatus, DeviceStatus);\r | |
705 | return Status;\r | |
706 | }\r | |
707 | \r | |
708 | \r | |
709 | STATIC\r | |
710 | EFI_STATUS\r | |
711 | EFIAPI\r | |
712 | Virtio10SetDeviceStatus (\r | |
713 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
714 | IN UINT8 DeviceStatus\r | |
715 | )\r | |
716 | {\r | |
717 | VIRTIO_1_0_DEV *Dev;\r | |
718 | EFI_STATUS Status;\r | |
719 | \r | |
720 | Dev = VIRTIO_1_0_FROM_VIRTIO_DEVICE (This);\r | |
721 | \r | |
722 | Status = Virtio10Transfer (Dev->PciIo, &Dev->CommonConfig, TRUE,\r | |
723 | OFFSET_OF (VIRTIO_PCI_COMMON_CFG, DeviceStatus),\r | |
724 | sizeof DeviceStatus, &DeviceStatus);\r | |
725 | return Status;\r | |
726 | }\r | |
727 | \r | |
728 | \r | |
729 | STATIC\r | |
730 | EFI_STATUS\r | |
731 | EFIAPI\r | |
732 | Virtio10WriteDevice (\r | |
733 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
734 | IN UINTN FieldOffset,\r | |
735 | IN UINTN FieldSize,\r | |
736 | IN UINT64 Value\r | |
737 | )\r | |
738 | {\r | |
739 | VIRTIO_1_0_DEV *Dev;\r | |
740 | EFI_STATUS Status;\r | |
741 | \r | |
742 | Dev = VIRTIO_1_0_FROM_VIRTIO_DEVICE (This);\r | |
743 | \r | |
744 | Status = Virtio10Transfer (Dev->PciIo, &Dev->SpecificConfig, TRUE,\r | |
745 | FieldOffset, FieldSize, &Value);\r | |
746 | return Status;\r | |
747 | }\r | |
748 | \r | |
749 | \r | |
750 | STATIC\r | |
751 | EFI_STATUS\r | |
752 | EFIAPI\r | |
753 | Virtio10ReadDevice (\r | |
754 | IN VIRTIO_DEVICE_PROTOCOL *This,\r | |
755 | IN UINTN FieldOffset,\r | |
756 | IN UINTN FieldSize,\r | |
757 | IN UINTN BufferSize,\r | |
758 | OUT VOID *Buffer\r | |
759 | )\r | |
760 | {\r | |
761 | VIRTIO_1_0_DEV *Dev;\r | |
762 | EFI_STATUS Status;\r | |
763 | \r | |
764 | if (FieldSize != BufferSize) {\r | |
765 | return EFI_INVALID_PARAMETER;\r | |
766 | }\r | |
767 | \r | |
768 | Dev = VIRTIO_1_0_FROM_VIRTIO_DEVICE (This);\r | |
769 | \r | |
770 | Status = Virtio10Transfer (Dev->PciIo, &Dev->SpecificConfig, FALSE,\r | |
771 | FieldOffset, FieldSize, Buffer);\r | |
772 | return Status;\r | |
773 | }\r | |
774 | \r | |
775 | \r | |
776 | STATIC CONST VIRTIO_DEVICE_PROTOCOL mVirtIoTemplate = {\r | |
777 | VIRTIO_SPEC_REVISION (1, 0, 0),\r | |
778 | 0, // SubSystemDeviceId, filled in dynamically\r | |
779 | Virtio10GetDeviceFeatures,\r | |
780 | Virtio10SetGuestFeatures,\r | |
781 | Virtio10SetQueueAddress,\r | |
782 | Virtio10SetQueueSel,\r | |
783 | Virtio10SetQueueNotify,\r | |
784 | Virtio10SetQueueAlign,\r | |
785 | Virtio10SetPageSize,\r | |
786 | Virtio10GetQueueNumMax,\r | |
787 | Virtio10SetQueueNum,\r | |
788 | Virtio10GetDeviceStatus,\r | |
789 | Virtio10SetDeviceStatus,\r | |
790 | Virtio10WriteDevice,\r | |
791 | Virtio10ReadDevice\r | |
792 | };\r | |
793 | \r | |
794 | \r | |
795 | //\r | |
796 | // EFI_DRIVER_BINDING_PROTOCOL member functions\r | |
797 | //\r | |
798 | \r | |
799 | STATIC\r | |
800 | EFI_STATUS\r | |
801 | EFIAPI\r | |
802 | Virtio10BindingSupported (\r | |
803 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
804 | IN EFI_HANDLE DeviceHandle,\r | |
805 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
806 | )\r | |
807 | {\r | |
808 | EFI_STATUS Status;\r | |
809 | EFI_PCI_IO_PROTOCOL *PciIo;\r | |
810 | PCI_TYPE00 Pci;\r | |
811 | \r | |
812 | Status = gBS->OpenProtocol (DeviceHandle, &gEfiPciIoProtocolGuid,\r | |
813 | (VOID **)&PciIo, This->DriverBindingHandle,\r | |
814 | DeviceHandle, EFI_OPEN_PROTOCOL_BY_DRIVER);\r | |
815 | if (EFI_ERROR (Status)) {\r | |
816 | return Status;\r | |
817 | }\r | |
818 | \r | |
819 | Status = PciIo->Pci.Read (PciIo, EfiPciIoWidthUint32, 0,\r | |
820 | sizeof Pci / sizeof (UINT32), &Pci);\r | |
821 | if (EFI_ERROR (Status)) {\r | |
822 | goto CloseProtocol;\r | |
823 | }\r | |
824 | \r | |
76569ca8 | 825 | Status = EFI_UNSUPPORTED;\r |
9399f68a LE |
826 | //\r |
827 | // Recognize non-transitional modern devices. Also, we'll have to parse the\r | |
828 | // PCI capability list, so make sure the CapabilityPtr field will be valid.\r | |
829 | //\r | |
830 | if (Pci.Hdr.VendorId == VIRTIO_VENDOR_ID &&\r | |
831 | Pci.Hdr.DeviceId >= 0x1040 &&\r | |
832 | Pci.Hdr.DeviceId <= 0x107F &&\r | |
833 | Pci.Hdr.RevisionID >= 0x01 &&\r | |
834 | Pci.Device.SubsystemID >= 0x40 &&\r | |
835 | (Pci.Hdr.Status & EFI_PCI_STATUS_CAPABILITY) != 0) {\r | |
76569ca8 LE |
836 | //\r |
837 | // The virtio-vga device is special. It can be driven both as a VGA device\r | |
838 | // with a linear framebuffer, and through its underlying, modern,\r | |
839 | // virtio-gpu-pci device, which has no linear framebuffer itself. For\r | |
840 | // compatibility with guest OSes that insist on inheriting a linear\r | |
841 | // framebuffer from the firmware, we should leave virtio-vga to\r | |
842 | // QemuVideoDxe, and support only virtio-gpu-pci here.\r | |
843 | //\r | |
844 | // Both virtio-vga and virtio-gpu-pci have DeviceId 0x1050, but only the\r | |
845 | // former has device class PCI_CLASS_DISPLAY_VGA.\r | |
846 | //\r | |
847 | if (Pci.Hdr.DeviceId != 0x1050 || !IS_PCI_VGA (&Pci)) {\r | |
848 | Status = EFI_SUCCESS;\r | |
849 | }\r | |
9399f68a LE |
850 | }\r |
851 | \r | |
852 | CloseProtocol:\r | |
853 | gBS->CloseProtocol (DeviceHandle, &gEfiPciIoProtocolGuid,\r | |
854 | This->DriverBindingHandle, DeviceHandle);\r | |
855 | \r | |
856 | return Status;\r | |
857 | }\r | |
858 | \r | |
859 | \r | |
860 | STATIC\r | |
861 | EFI_STATUS\r | |
862 | EFIAPI\r | |
863 | Virtio10BindingStart (\r | |
864 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
865 | IN EFI_HANDLE DeviceHandle,\r | |
866 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
867 | )\r | |
868 | {\r | |
869 | VIRTIO_1_0_DEV *Device;\r | |
870 | EFI_STATUS Status;\r | |
871 | PCI_TYPE00 Pci;\r | |
872 | UINT64 SetAttributes;\r | |
873 | \r | |
874 | Device = AllocateZeroPool (sizeof *Device);\r | |
875 | if (Device == NULL) {\r | |
876 | return EFI_OUT_OF_RESOURCES;\r | |
877 | }\r | |
878 | \r | |
879 | Device->Signature = VIRTIO_1_0_SIGNATURE;\r | |
880 | CopyMem (&Device->VirtIo, &mVirtIoTemplate, sizeof mVirtIoTemplate);\r | |
881 | \r | |
882 | Status = gBS->OpenProtocol (DeviceHandle, &gEfiPciIoProtocolGuid,\r | |
883 | (VOID **)&Device->PciIo, This->DriverBindingHandle,\r | |
884 | DeviceHandle, EFI_OPEN_PROTOCOL_BY_DRIVER);\r | |
885 | if (EFI_ERROR (Status)) {\r | |
886 | goto FreeDevice;\r | |
887 | }\r | |
888 | \r | |
889 | Status = Device->PciIo->Pci.Read (Device->PciIo, EfiPciIoWidthUint32, 0,\r | |
890 | sizeof Pci / sizeof (UINT32), &Pci);\r | |
891 | if (EFI_ERROR (Status)) {\r | |
892 | goto ClosePciIo;\r | |
893 | }\r | |
894 | \r | |
895 | Device->VirtIo.SubSystemDeviceId = Pci.Hdr.DeviceId - 0x1040;\r | |
896 | \r | |
897 | Status = ParseCapabilities (Device, Pci.Device.CapabilityPtr);\r | |
898 | if (EFI_ERROR (Status)) {\r | |
899 | goto ClosePciIo;\r | |
900 | }\r | |
901 | \r | |
902 | Status = Device->PciIo->Attributes (Device->PciIo,\r | |
903 | EfiPciIoAttributeOperationGet, 0,\r | |
904 | &Device->OriginalPciAttributes);\r | |
905 | if (EFI_ERROR (Status)) {\r | |
906 | goto ClosePciIo;\r | |
907 | }\r | |
908 | \r | |
909 | SetAttributes = 0;\r | |
910 | UpdateAttributes (&Device->CommonConfig, &SetAttributes);\r | |
911 | UpdateAttributes (&Device->NotifyConfig, &SetAttributes);\r | |
912 | UpdateAttributes (&Device->SpecificConfig, &SetAttributes);\r | |
913 | Status = Device->PciIo->Attributes (Device->PciIo,\r | |
914 | EfiPciIoAttributeOperationEnable, SetAttributes,\r | |
915 | NULL);\r | |
916 | if (EFI_ERROR (Status)) {\r | |
917 | goto ClosePciIo;\r | |
918 | }\r | |
919 | \r | |
920 | Status = gBS->InstallProtocolInterface (&DeviceHandle,\r | |
921 | &gVirtioDeviceProtocolGuid, EFI_NATIVE_INTERFACE,\r | |
922 | &Device->VirtIo);\r | |
923 | if (EFI_ERROR (Status)) {\r | |
924 | goto RestorePciAttributes;\r | |
925 | }\r | |
926 | \r | |
927 | return EFI_SUCCESS;\r | |
928 | \r | |
929 | RestorePciAttributes:\r | |
930 | Device->PciIo->Attributes (Device->PciIo, EfiPciIoAttributeOperationSet,\r | |
931 | Device->OriginalPciAttributes, NULL);\r | |
932 | \r | |
933 | ClosePciIo:\r | |
934 | gBS->CloseProtocol (DeviceHandle, &gEfiPciIoProtocolGuid,\r | |
935 | This->DriverBindingHandle, DeviceHandle);\r | |
936 | \r | |
937 | FreeDevice:\r | |
938 | FreePool (Device);\r | |
939 | \r | |
940 | return Status;\r | |
941 | }\r | |
942 | \r | |
943 | \r | |
944 | STATIC\r | |
945 | EFI_STATUS\r | |
946 | EFIAPI\r | |
947 | Virtio10BindingStop (\r | |
948 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
949 | IN EFI_HANDLE DeviceHandle,\r | |
950 | IN UINTN NumberOfChildren,\r | |
951 | IN EFI_HANDLE *ChildHandleBuffer\r | |
952 | )\r | |
953 | {\r | |
954 | EFI_STATUS Status;\r | |
955 | VIRTIO_DEVICE_PROTOCOL *VirtIo;\r | |
956 | VIRTIO_1_0_DEV *Device;\r | |
957 | \r | |
958 | Status = gBS->OpenProtocol (DeviceHandle, &gVirtioDeviceProtocolGuid,\r | |
959 | (VOID **)&VirtIo, This->DriverBindingHandle,\r | |
960 | DeviceHandle, EFI_OPEN_PROTOCOL_GET_PROTOCOL);\r | |
961 | if (EFI_ERROR (Status)) {\r | |
962 | return Status;\r | |
963 | }\r | |
964 | \r | |
965 | Device = VIRTIO_1_0_FROM_VIRTIO_DEVICE (VirtIo);\r | |
966 | \r | |
967 | Status = gBS->UninstallProtocolInterface (DeviceHandle,\r | |
968 | &gVirtioDeviceProtocolGuid, &Device->VirtIo);\r | |
969 | if (EFI_ERROR (Status)) {\r | |
970 | return Status;\r | |
971 | }\r | |
972 | \r | |
973 | Device->PciIo->Attributes (Device->PciIo, EfiPciIoAttributeOperationSet,\r | |
974 | Device->OriginalPciAttributes, NULL);\r | |
975 | gBS->CloseProtocol (DeviceHandle, &gEfiPciIoProtocolGuid,\r | |
976 | This->DriverBindingHandle, DeviceHandle);\r | |
977 | FreePool (Device);\r | |
978 | \r | |
979 | return EFI_SUCCESS;\r | |
980 | }\r | |
981 | \r | |
982 | \r | |
983 | STATIC EFI_DRIVER_BINDING_PROTOCOL mDriverBinding = {\r | |
984 | &Virtio10BindingSupported,\r | |
985 | &Virtio10BindingStart,\r | |
986 | &Virtio10BindingStop,\r | |
987 | 0x10, // Version\r | |
988 | NULL, // ImageHandle, to be overwritten\r | |
989 | NULL // DriverBindingHandle, to be overwritten\r | |
990 | };\r | |
991 | \r | |
992 | \r | |
993 | //\r | |
994 | // EFI_COMPONENT_NAME_PROTOCOL and EFI_COMPONENT_NAME2_PROTOCOL\r | |
995 | // implementations\r | |
996 | //\r | |
997 | \r | |
998 | STATIC\r | |
999 | EFI_UNICODE_STRING_TABLE mDriverNameTable[] = {\r | |
1000 | { "eng;en", L"Virtio 1.0 PCI Driver" },\r | |
1001 | { NULL, NULL }\r | |
1002 | };\r | |
1003 | \r | |
1004 | STATIC\r | |
1005 | EFI_COMPONENT_NAME_PROTOCOL mComponentName;\r | |
1006 | \r | |
1007 | STATIC\r | |
1008 | EFI_STATUS\r | |
1009 | EFIAPI\r | |
1010 | Virtio10GetDriverName (\r | |
1011 | IN EFI_COMPONENT_NAME_PROTOCOL *This,\r | |
1012 | IN CHAR8 *Language,\r | |
1013 | OUT CHAR16 **DriverName\r | |
1014 | )\r | |
1015 | {\r | |
1016 | return LookupUnicodeString2 (\r | |
1017 | Language,\r | |
1018 | This->SupportedLanguages,\r | |
1019 | mDriverNameTable,\r | |
1020 | DriverName,\r | |
1021 | (BOOLEAN)(This == &mComponentName) // Iso639Language\r | |
1022 | );\r | |
1023 | }\r | |
1024 | \r | |
1025 | STATIC\r | |
1026 | EFI_STATUS\r | |
1027 | EFIAPI\r | |
1028 | Virtio10GetDeviceName (\r | |
1029 | IN EFI_COMPONENT_NAME_PROTOCOL *This,\r | |
1030 | IN EFI_HANDLE DeviceHandle,\r | |
1031 | IN EFI_HANDLE ChildHandle,\r | |
1032 | IN CHAR8 *Language,\r | |
1033 | OUT CHAR16 **ControllerName\r | |
1034 | )\r | |
1035 | {\r | |
1036 | return EFI_UNSUPPORTED;\r | |
1037 | }\r | |
1038 | \r | |
1039 | STATIC\r | |
1040 | EFI_COMPONENT_NAME_PROTOCOL mComponentName = {\r | |
1041 | &Virtio10GetDriverName,\r | |
1042 | &Virtio10GetDeviceName,\r | |
1043 | "eng"\r | |
1044 | };\r | |
1045 | \r | |
1046 | STATIC\r | |
1047 | EFI_COMPONENT_NAME2_PROTOCOL mComponentName2 = {\r | |
1048 | (EFI_COMPONENT_NAME2_GET_DRIVER_NAME) &Virtio10GetDriverName,\r | |
1049 | (EFI_COMPONENT_NAME2_GET_CONTROLLER_NAME) &Virtio10GetDeviceName,\r | |
1050 | "en"\r | |
1051 | };\r | |
1052 | \r | |
1053 | \r | |
1054 | //\r | |
1055 | // Entry point of this driver\r | |
1056 | //\r | |
1057 | \r | |
1058 | EFI_STATUS\r | |
1059 | EFIAPI\r | |
1060 | Virtio10EntryPoint (\r | |
1061 | IN EFI_HANDLE ImageHandle,\r | |
1062 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
1063 | )\r | |
1064 | {\r | |
1065 | return EfiLibInstallDriverBindingComponentName2 (\r | |
1066 | ImageHandle,\r | |
1067 | SystemTable,\r | |
1068 | &mDriverBinding,\r | |
1069 | ImageHandle,\r | |
1070 | &mComponentName,\r | |
1071 | &mComponentName2\r | |
1072 | );\r | |
1073 | }\r |