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e65e8802 AP |
1 | /** @file\r |
2 | This driver produces XenBus Protocol instances for each Xen PV devices.\r | |
3 | \r | |
4 | This XenBus bus driver will first initialize differente services in order to\r | |
5 | enumerate the ParaVirtualized devices available.\r | |
6 | \r | |
7 | Those services are:\r | |
8 | - HyperCall\r | |
9 | - Event Channel\r | |
10 | - Grant Table\r | |
11 | - XenStore\r | |
12 | - XenBus\r | |
13 | \r | |
14 | Copyright (C) 2014, Citrix Ltd.\r | |
15 | \r | |
16 | This program and the accompanying materials\r | |
17 | are licensed and made available under the terms and conditions of the BSD License\r | |
18 | which accompanies this distribution. The full text of the license may be found at\r | |
19 | http://opensource.org/licenses/bsd-license.php\r | |
20 | \r | |
21 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
22 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
23 | \r | |
24 | **/\r | |
25 | \r | |
e65e8802 | 26 | #include <Library/DebugLib.h>\r |
cd8ff8fd | 27 | #include <Library/XenHypercallLib.h>\r |
e65e8802 AP |
28 | \r |
29 | #include "XenBusDxe.h"\r | |
30 | \r | |
0fd14246 | 31 | #include "GrantTable.h"\r |
a9090a94 | 32 | #include "XenStore.h"\r |
86d968e0 | 33 | #include "XenBus.h"\r |
abcbbb14 | 34 | \r |
bbc3758a AB |
35 | #include <IndustryStandard/Xen/hvm/params.h>\r |
36 | #include <IndustryStandard/Xen/memory.h>\r | |
e65e8802 AP |
37 | \r |
38 | ///\r | |
39 | /// Driver Binding Protocol instance\r | |
40 | ///\r | |
41 | EFI_DRIVER_BINDING_PROTOCOL gXenBusDxeDriverBinding = {\r | |
42 | XenBusDxeDriverBindingSupported,\r | |
43 | XenBusDxeDriverBindingStart,\r | |
44 | XenBusDxeDriverBindingStop,\r | |
45 | XENBUS_DXE_VERSION,\r | |
46 | NULL,\r | |
47 | NULL\r | |
48 | };\r | |
49 | \r | |
50 | \r | |
a154f420 AP |
51 | STATIC EFI_LOCK mMyDeviceLock = EFI_INITIALIZE_LOCK_VARIABLE (TPL_CALLBACK);\r |
52 | STATIC XENBUS_DEVICE *mMyDevice = NULL;\r | |
53 | \r | |
bbc3758a AB |
54 | /**\r |
55 | Map the shared_info_t page into memory.\r | |
56 | \r | |
57 | @param Dev A XENBUS_DEVICE instance.\r | |
58 | \r | |
59 | @retval EFI_SUCCESS Dev->SharedInfo whill contain a pointer to\r | |
60 | the shared info page\r | |
61 | @retval EFI_LOAD_ERROR The shared info page could not be mapped. The\r | |
62 | hypercall returned an error.\r | |
63 | **/\r | |
64 | STATIC\r | |
65 | EFI_STATUS\r | |
66 | XenGetSharedInfoPage (\r | |
67 | IN OUT XENBUS_DEVICE *Dev\r | |
68 | )\r | |
69 | {\r | |
70 | xen_add_to_physmap_t Parameter;\r | |
71 | \r | |
72 | ASSERT (Dev->SharedInfo == NULL);\r | |
73 | \r | |
74 | Parameter.domid = DOMID_SELF;\r | |
75 | Parameter.space = XENMAPSPACE_shared_info;\r | |
76 | Parameter.idx = 0;\r | |
77 | \r | |
78 | //\r | |
79 | // using reserved page because the page is not released when Linux is\r | |
80 | // starting because of the add_to_physmap. QEMU might try to access the\r | |
81 | // page, and fail because it have no right to do so (segv).\r | |
82 | //\r | |
83 | Dev->SharedInfo = AllocateReservedPages (1);\r | |
84 | Parameter.gpfn = (UINTN) Dev->SharedInfo >> EFI_PAGE_SHIFT;\r | |
85 | if (XenHypercallMemoryOp (XENMEM_add_to_physmap, &Parameter) != 0) {\r | |
86 | FreePages (Dev->SharedInfo, 1);\r | |
87 | Dev->SharedInfo = NULL;\r | |
88 | return EFI_LOAD_ERROR;\r | |
89 | }\r | |
90 | \r | |
91 | return EFI_SUCCESS;\r | |
92 | }\r | |
93 | \r | |
e65e8802 AP |
94 | /**\r |
95 | Unloads an image.\r | |
96 | \r | |
97 | @param ImageHandle Handle that identifies the image to be unloaded.\r | |
98 | \r | |
99 | @retval EFI_SUCCESS The image has been unloaded.\r | |
100 | @retval EFI_INVALID_PARAMETER ImageHandle is not a valid image handle.\r | |
101 | \r | |
102 | **/\r | |
103 | EFI_STATUS\r | |
104 | EFIAPI\r | |
105 | XenBusDxeUnload (\r | |
106 | IN EFI_HANDLE ImageHandle\r | |
107 | )\r | |
108 | {\r | |
109 | EFI_STATUS Status;\r | |
110 | \r | |
111 | EFI_HANDLE *HandleBuffer;\r | |
112 | UINTN HandleCount;\r | |
113 | UINTN Index;\r | |
114 | \r | |
115 | //\r | |
116 | // Retrieve array of all handles in the handle database\r | |
117 | //\r | |
118 | Status = gBS->LocateHandleBuffer (\r | |
119 | AllHandles,\r | |
120 | NULL,\r | |
121 | NULL,\r | |
122 | &HandleCount,\r | |
123 | &HandleBuffer\r | |
124 | );\r | |
125 | if (EFI_ERROR (Status)) {\r | |
126 | return Status;\r | |
127 | }\r | |
128 | \r | |
129 | //\r | |
130 | // Disconnect the current driver from handles in the handle database\r | |
131 | //\r | |
132 | for (Index = 0; Index < HandleCount; Index++) {\r | |
133 | gBS->DisconnectController (HandleBuffer[Index], gImageHandle, NULL);\r | |
134 | }\r | |
135 | \r | |
136 | //\r | |
137 | // Free the array of handles\r | |
138 | //\r | |
139 | FreePool (HandleBuffer);\r | |
140 | \r | |
141 | \r | |
142 | //\r | |
143 | // Uninstall protocols installed in the driver entry point\r | |
144 | //\r | |
145 | Status = gBS->UninstallMultipleProtocolInterfaces (\r | |
146 | ImageHandle,\r | |
147 | &gEfiDriverBindingProtocolGuid, &gXenBusDxeDriverBinding,\r | |
148 | &gEfiComponentNameProtocolGuid, &gXenBusDxeComponentName,\r | |
149 | &gEfiComponentName2ProtocolGuid, &gXenBusDxeComponentName2,\r | |
150 | NULL\r | |
151 | );\r | |
152 | if (EFI_ERROR (Status)) {\r | |
153 | return Status;\r | |
154 | }\r | |
155 | \r | |
156 | return EFI_SUCCESS;\r | |
157 | }\r | |
158 | \r | |
159 | /**\r | |
160 | This is the declaration of an EFI image entry point. This entry point is\r | |
161 | the same for UEFI Applications, UEFI OS Loaders, and UEFI Drivers including\r | |
162 | both device drivers and bus drivers.\r | |
163 | \r | |
164 | @param ImageHandle The firmware allocated handle for the UEFI image.\r | |
165 | @param SystemTable A pointer to the EFI System Table.\r | |
166 | \r | |
167 | @retval EFI_SUCCESS The operation completed successfully.\r | |
168 | @retval Others An unexpected error occurred.\r | |
169 | **/\r | |
170 | EFI_STATUS\r | |
171 | EFIAPI\r | |
172 | XenBusDxeDriverEntryPoint (\r | |
173 | IN EFI_HANDLE ImageHandle,\r | |
174 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
175 | )\r | |
176 | {\r | |
177 | EFI_STATUS Status;\r | |
178 | \r | |
179 | //\r | |
180 | // Install UEFI Driver Model protocol(s).\r | |
181 | //\r | |
182 | Status = EfiLibInstallDriverBindingComponentName2 (\r | |
183 | ImageHandle,\r | |
184 | SystemTable,\r | |
185 | &gXenBusDxeDriverBinding,\r | |
186 | ImageHandle,\r | |
187 | &gXenBusDxeComponentName,\r | |
188 | &gXenBusDxeComponentName2\r | |
189 | );\r | |
190 | ASSERT_EFI_ERROR (Status);\r | |
191 | \r | |
192 | \r | |
193 | return Status;\r | |
194 | }\r | |
195 | \r | |
196 | \r | |
197 | /**\r | |
198 | Tests to see if this driver supports a given controller. If a child device is provided,\r | |
199 | it further tests to see if this driver supports creating a handle for the specified child device.\r | |
200 | \r | |
201 | @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r | |
202 | @param[in] ControllerHandle The handle of the controller to test. This handle\r | |
203 | must support a protocol interface that supplies\r | |
204 | an I/O abstraction to the driver.\r | |
205 | @param[in] RemainingDevicePath A pointer to the remaining portion of a device path. This\r | |
206 | parameter is ignored by device drivers, and is optional for bus\r | |
207 | drivers. For bus drivers, if this parameter is not NULL, then\r | |
208 | the bus driver must determine if the bus controller specified\r | |
209 | by ControllerHandle and the child controller specified\r | |
210 | by RemainingDevicePath are both supported by this\r | |
211 | bus driver.\r | |
212 | \r | |
213 | @retval EFI_SUCCESS The device specified by ControllerHandle and\r | |
214 | RemainingDevicePath is supported by the driver specified by This.\r | |
215 | @retval EFI_ALREADY_STARTED The device specified by ControllerHandle and\r | |
216 | RemainingDevicePath is already being managed by the driver\r | |
217 | specified by This.\r | |
218 | @retval EFI_ACCESS_DENIED The device specified by ControllerHandle and\r | |
219 | RemainingDevicePath is already being managed by a different\r | |
220 | driver or an application that requires exclusive access.\r | |
221 | Currently not implemented.\r | |
222 | @retval EFI_UNSUPPORTED The device specified by ControllerHandle and\r | |
223 | RemainingDevicePath is not supported by the driver specified by This.\r | |
224 | **/\r | |
225 | EFI_STATUS\r | |
226 | EFIAPI\r | |
227 | XenBusDxeDriverBindingSupported (\r | |
228 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
229 | IN EFI_HANDLE ControllerHandle,\r | |
230 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL\r | |
231 | )\r | |
232 | {\r | |
233 | EFI_STATUS Status;\r | |
d9fdfd85 | 234 | XENIO_PROTOCOL *XenIo;\r |
e65e8802 AP |
235 | \r |
236 | Status = gBS->OpenProtocol (\r | |
237 | ControllerHandle,\r | |
d9fdfd85 AB |
238 | &gXenIoProtocolGuid,\r |
239 | (VOID **)&XenIo,\r | |
e65e8802 AP |
240 | This->DriverBindingHandle,\r |
241 | ControllerHandle,\r | |
242 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
243 | );\r | |
d9fdfd85 | 244 | \r |
e65e8802 AP |
245 | if (EFI_ERROR (Status)) {\r |
246 | return Status;\r | |
247 | }\r | |
248 | \r | |
d9fdfd85 | 249 | gBS->CloseProtocol (ControllerHandle, &gXenIoProtocolGuid,\r |
e65e8802 AP |
250 | This->DriverBindingHandle, ControllerHandle);\r |
251 | \r | |
252 | return Status;\r | |
253 | }\r | |
254 | \r | |
a154f420 AP |
255 | VOID\r |
256 | EFIAPI\r | |
257 | NotifyExitBoot (\r | |
258 | IN EFI_EVENT Event,\r | |
259 | IN VOID *Context\r | |
260 | )\r | |
261 | {\r | |
262 | XENBUS_DEVICE *Dev = Context;\r | |
263 | \r | |
264 | gBS->DisconnectController(Dev->ControllerHandle,\r | |
265 | Dev->This->DriverBindingHandle, NULL);\r | |
266 | }\r | |
267 | \r | |
e65e8802 AP |
268 | /**\r |
269 | Starts a bus controller.\r | |
270 | \r | |
271 | The Start() function is designed to be invoked from the EFI boot service ConnectController().\r | |
272 | As a result, much of the error checking on the parameters to Start() has been moved into this\r | |
273 | common boot service. It is legal to call Start() from other locations,\r | |
274 | but the following calling restrictions must be followed, or the system behavior will not be deterministic.\r | |
275 | 1. ControllerHandle must be a valid EFI_HANDLE.\r | |
276 | 2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally aligned\r | |
277 | EFI_DEVICE_PATH_PROTOCOL.\r | |
278 | 3. Prior to calling Start(), the Supported() function for the driver specified by This must\r | |
279 | have been called with the same calling parameters, and Supported() must have returned EFI_SUCCESS.\r | |
280 | \r | |
281 | @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r | |
282 | @param[in] ControllerHandle The handle of the controller to start. This handle\r | |
283 | must support a protocol interface that supplies\r | |
284 | an I/O abstraction to the driver.\r | |
285 | @param[in] RemainingDevicePath A pointer to the remaining portion of a device path. This\r | |
286 | parameter is ignored by device drivers, and is optional for bus\r | |
287 | drivers. For a bus driver, if this parameter is NULL, then handles\r | |
288 | for all the children of Controller are created by this driver.\r | |
289 | If this parameter is not NULL and the first Device Path Node is\r | |
290 | not the End of Device Path Node, then only the handle for the\r | |
291 | child device specified by the first Device Path Node of\r | |
292 | RemainingDevicePath is created by this driver.\r | |
293 | If the first Device Path Node of RemainingDevicePath is\r | |
294 | the End of Device Path Node, no child handle is created by this\r | |
295 | driver.\r | |
296 | \r | |
297 | @retval EFI_SUCCESS The device was started.\r | |
298 | @retval EFI_DEVICE_ERROR The device could not be started due to a device error.Currently not implemented.\r | |
299 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r | |
abcbbb14 AP |
300 | @retval EFI_UNSUPPORTED Something is missing on the system that\r |
301 | prevent to start the edvice.\r | |
e65e8802 AP |
302 | @retval Others The driver failded to start the device.\r |
303 | \r | |
304 | **/\r | |
305 | EFI_STATUS\r | |
306 | EFIAPI\r | |
307 | XenBusDxeDriverBindingStart (\r | |
308 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
309 | IN EFI_HANDLE ControllerHandle,\r | |
310 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL\r | |
311 | )\r | |
312 | {\r | |
a154f420 AP |
313 | EFI_STATUS Status;\r |
314 | XENBUS_DEVICE *Dev;\r | |
d9fdfd85 | 315 | XENIO_PROTOCOL *XenIo;\r |
86d968e0 | 316 | EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r |
956622c4 AP |
317 | \r |
318 | Status = gBS->OpenProtocol (\r | |
319 | ControllerHandle,\r | |
d9fdfd85 AB |
320 | &gXenIoProtocolGuid,\r |
321 | (VOID**)&XenIo,\r | |
956622c4 AP |
322 | This->DriverBindingHandle,\r |
323 | ControllerHandle,\r | |
324 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
325 | );\r | |
d9fdfd85 | 326 | \r |
956622c4 AP |
327 | if (EFI_ERROR (Status)) {\r |
328 | return Status;\r | |
329 | }\r | |
a154f420 | 330 | \r |
86d968e0 AP |
331 | Status = gBS->OpenProtocol (\r |
332 | ControllerHandle,\r | |
333 | &gEfiDevicePathProtocolGuid,\r | |
334 | (VOID **) &DevicePath,\r | |
335 | This->DriverBindingHandle,\r | |
336 | ControllerHandle,\r | |
337 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
338 | );\r | |
339 | \r | |
340 | if (EFI_ERROR (Status)) {\r | |
341 | goto ErrorOpenningProtocol;\r | |
342 | }\r | |
343 | \r | |
a154f420 AP |
344 | Dev = AllocateZeroPool (sizeof (*Dev));\r |
345 | Dev->Signature = XENBUS_DEVICE_SIGNATURE;\r | |
346 | Dev->This = This;\r | |
347 | Dev->ControllerHandle = ControllerHandle;\r | |
d9fdfd85 | 348 | Dev->XenIo = XenIo;\r |
86d968e0 AP |
349 | Dev->DevicePath = DevicePath;\r |
350 | InitializeListHead (&Dev->ChildList);\r | |
a154f420 AP |
351 | \r |
352 | EfiAcquireLock (&mMyDeviceLock);\r | |
353 | if (mMyDevice != NULL) {\r | |
354 | EfiReleaseLock (&mMyDeviceLock);\r | |
355 | //\r | |
356 | // There is already a XenBus running, only one can be used at a time.\r | |
357 | //\r | |
358 | Status = EFI_ALREADY_STARTED;\r | |
359 | goto ErrorAllocated;\r | |
360 | }\r | |
361 | mMyDevice = Dev;\r | |
362 | EfiReleaseLock (&mMyDeviceLock);\r | |
363 | \r | |
abcbbb14 AP |
364 | Status = XenGetSharedInfoPage (Dev);\r |
365 | if (EFI_ERROR (Status)) {\r | |
366 | DEBUG ((EFI_D_ERROR, "XenBus: Unable to get the shared info page.\n"));\r | |
367 | Status = EFI_UNSUPPORTED;\r | |
368 | goto ErrorAllocated;\r | |
369 | }\r | |
370 | \r | |
d9fdfd85 | 371 | XenGrantTableInit (Dev);\r |
0fd14246 | 372 | \r |
a9090a94 AP |
373 | Status = XenStoreInit (Dev);\r |
374 | ASSERT_EFI_ERROR (Status);\r | |
375 | \r | |
86d968e0 AP |
376 | XenBusEnumerateBus (Dev);\r |
377 | \r | |
a154f420 AP |
378 | Status = gBS->CreateEvent (EVT_SIGNAL_EXIT_BOOT_SERVICES, TPL_CALLBACK,\r |
379 | NotifyExitBoot,\r | |
380 | (VOID*) Dev,\r | |
381 | &Dev->ExitBootEvent);\r | |
382 | ASSERT_EFI_ERROR (Status);\r | |
383 | \r | |
384 | return EFI_SUCCESS;\r | |
385 | \r | |
386 | ErrorAllocated:\r | |
387 | FreePool (Dev);\r | |
86d968e0 AP |
388 | gBS->CloseProtocol (ControllerHandle, &gEfiDevicePathProtocolGuid,\r |
389 | This->DriverBindingHandle, ControllerHandle);\r | |
390 | ErrorOpenningProtocol:\r | |
d9fdfd85 | 391 | gBS->CloseProtocol (ControllerHandle, &gXenIoProtocolGuid,\r |
956622c4 | 392 | This->DriverBindingHandle, ControllerHandle);\r |
a154f420 | 393 | return Status;\r |
e65e8802 AP |
394 | }\r |
395 | \r | |
396 | /**\r | |
397 | Stops a bus controller.\r | |
398 | \r | |
399 | The Stop() function is designed to be invoked from the EFI boot service DisconnectController().\r | |
400 | As a result, much of the error checking on the parameters to Stop() has been moved\r | |
401 | into this common boot service. It is legal to call Stop() from other locations,\r | |
402 | but the following calling restrictions must be followed, or the system behavior will not be deterministic.\r | |
403 | 1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous call to this\r | |
404 | same driver's Start() function.\r | |
405 | 2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid\r | |
406 | EFI_HANDLE. In addition, all of these handles must have been created in this driver's\r | |
407 | Start() function, and the Start() function must have called OpenProtocol() on\r | |
408 | ControllerHandle with an Attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.\r | |
409 | \r | |
410 | @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r | |
411 | @param[in] ControllerHandle A handle to the device being stopped. The handle must\r | |
412 | support a bus specific I/O protocol for the driver\r | |
413 | to use to stop the device.\r | |
414 | @param[in] NumberOfChildren The number of child device handles in ChildHandleBuffer.\r | |
415 | @param[in] ChildHandleBuffer An array of child handles to be freed. May be NULL\r | |
416 | if NumberOfChildren is 0.\r | |
417 | \r | |
418 | @retval EFI_SUCCESS The device was stopped.\r | |
419 | @retval EFI_DEVICE_ERROR The device could not be stopped due to a device error.\r | |
420 | \r | |
421 | **/\r | |
422 | EFI_STATUS\r | |
423 | EFIAPI\r | |
424 | XenBusDxeDriverBindingStop (\r | |
425 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
426 | IN EFI_HANDLE ControllerHandle,\r | |
427 | IN UINTN NumberOfChildren,\r | |
428 | IN EFI_HANDLE *ChildHandleBuffer OPTIONAL\r | |
429 | )\r | |
430 | {\r | |
86d968e0 AP |
431 | UINTN Index;\r |
432 | XENBUS_PROTOCOL *XenBusIo;\r | |
433 | XENBUS_PRIVATE_DATA *ChildData;\r | |
434 | EFI_STATUS Status;\r | |
a154f420 AP |
435 | XENBUS_DEVICE *Dev = mMyDevice;\r |
436 | \r | |
86d968e0 AP |
437 | for (Index = 0; Index < NumberOfChildren; Index++) {\r |
438 | Status = gBS->OpenProtocol (\r | |
439 | ChildHandleBuffer[Index],\r | |
440 | &gXenBusProtocolGuid,\r | |
441 | (VOID **) &XenBusIo,\r | |
442 | This->DriverBindingHandle,\r | |
443 | ControllerHandle,\r | |
444 | EFI_OPEN_PROTOCOL_GET_PROTOCOL);\r | |
445 | if (EFI_ERROR (Status)) {\r | |
446 | DEBUG ((EFI_D_ERROR, "XenBusDxe: get children protocol failed: %r\n", Status));\r | |
447 | continue;\r | |
448 | }\r | |
449 | ChildData = XENBUS_PRIVATE_DATA_FROM_THIS (XenBusIo);\r | |
450 | Status = gBS->DisconnectController (ChildData->Handle, NULL, NULL);\r | |
451 | if (EFI_ERROR (Status)) {\r | |
452 | DEBUG ((EFI_D_ERROR, "XenBusDxe: error disconnecting child: %r\n",\r | |
453 | Status));\r | |
454 | continue;\r | |
455 | }\r | |
456 | \r | |
457 | Status = gBS->UninstallMultipleProtocolInterfaces (\r | |
458 | ChildData->Handle,\r | |
459 | &gEfiDevicePathProtocolGuid, ChildData->DevicePath,\r | |
460 | &gXenBusProtocolGuid, &ChildData->XenBusIo,\r | |
461 | NULL);\r | |
462 | ASSERT_EFI_ERROR (Status);\r | |
463 | \r | |
464 | FreePool ((VOID*)ChildData->XenBusIo.Type);\r | |
465 | FreePool ((VOID*)ChildData->XenBusIo.Node);\r | |
466 | FreePool ((VOID*)ChildData->XenBusIo.Backend);\r | |
467 | FreePool (ChildData->DevicePath);\r | |
468 | RemoveEntryList (&ChildData->Link);\r | |
469 | FreePool (ChildData);\r | |
470 | }\r | |
471 | if (NumberOfChildren > 0) {\r | |
472 | return EFI_SUCCESS;\r | |
473 | }\r | |
474 | \r | |
a154f420 | 475 | gBS->CloseEvent (Dev->ExitBootEvent);\r |
a9090a94 | 476 | XenStoreDeinit (Dev);\r |
0fd14246 | 477 | XenGrantTableDeinit (Dev);\r |
a154f420 | 478 | \r |
86d968e0 AP |
479 | gBS->CloseProtocol (ControllerHandle, &gEfiDevicePathProtocolGuid,\r |
480 | This->DriverBindingHandle, ControllerHandle);\r | |
d9fdfd85 | 481 | gBS->CloseProtocol (ControllerHandle, &gXenIoProtocolGuid,\r |
956622c4 AP |
482 | This->DriverBindingHandle, ControllerHandle);\r |
483 | \r | |
a154f420 AP |
484 | mMyDevice = NULL;\r |
485 | FreePool (Dev);\r | |
486 | return EFI_SUCCESS;\r | |
e65e8802 | 487 | }\r |