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Commit | Line | Data |
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adbcbf8f | 1 | /** @file\r |
2 | Partition driver that produces logical BlockIo devices from a physical\r | |
3 | BlockIo device. The logical BlockIo devices are based on the format\r | |
8aafec2c | 4 | of the raw block devices media. Currently "El Torito CD-ROM", UDF, Legacy\r |
adbcbf8f | 5 | MBR, and GPT partition schemes are supported.\r |
6 | \r | |
709c9fd5 | 7 | Copyright (c) 2018 Qualcomm Datacenter Technologies, Inc.\r |
68599525 | 8 | Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r |
9d510e61 | 9 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
adbcbf8f | 10 | \r |
11 | **/\r | |
12 | \r | |
13 | \r | |
14 | #include "Partition.h"\r | |
15 | \r | |
16 | //\r | |
ff61847d | 17 | // Partition Driver Global Variables.\r |
adbcbf8f | 18 | //\r |
19 | EFI_DRIVER_BINDING_PROTOCOL gPartitionDriverBinding = {\r | |
20 | PartitionDriverBindingSupported,\r | |
21 | PartitionDriverBindingStart,\r | |
22 | PartitionDriverBindingStop,\r | |
c86b273d | 23 | //\r |
d1102dba LG |
24 | // Grub4Dos copies the BPB of the first partition to the MBR. If the\r |
25 | // DriverBindingStart() of the Fat driver gets run before that of Partition\r | |
c86b273d RN |
26 | // driver only the first partition can be recognized.\r |
27 | // Let the driver binding version of Partition driver be higher than that of\r | |
28 | // Fat driver to make sure the DriverBindingStart() of the Partition driver\r | |
29 | // gets run before that of Fat driver so that all the partitions can be recognized.\r | |
30 | //\r | |
31 | 0xb,\r | |
adbcbf8f | 32 | NULL,\r |
33 | NULL\r | |
34 | };\r | |
35 | \r | |
ff61847d | 36 | //\r |
d1102dba | 37 | // Prioritized function list to detect partition table.\r |
ff61847d | 38 | //\r |
adbcbf8f | 39 | PARTITION_DETECT_ROUTINE mPartitionDetectRoutineTable[] = {\r |
40 | PartitionInstallGptChildHandles,\r | |
adbcbf8f | 41 | PartitionInstallMbrChildHandles,\r |
8aafec2c | 42 | PartitionInstallUdfChildHandles,\r |
adbcbf8f | 43 | NULL\r |
44 | };\r | |
45 | \r | |
adbcbf8f | 46 | /**\r |
47 | Test to see if this driver supports ControllerHandle. Any ControllerHandle\r | |
490b5ea1 | 48 | than contains a BlockIo and DiskIo protocol or a BlockIo2 protocol can be\r |
49 | supported.\r | |
adbcbf8f | 50 | \r |
490b5ea1 | 51 | @param[in] This Protocol instance pointer.\r |
52 | @param[in] ControllerHandle Handle of device to test.\r | |
53 | @param[in] RemainingDevicePath Optional parameter use to pick a specific child\r | |
54 | device to start.\r | |
adbcbf8f | 55 | \r |
56 | @retval EFI_SUCCESS This driver supports this device\r | |
57 | @retval EFI_ALREADY_STARTED This driver is already running on this device\r | |
58 | @retval other This driver does not support this device\r | |
59 | \r | |
60 | **/\r | |
61 | EFI_STATUS\r | |
62 | EFIAPI\r | |
63 | PartitionDriverBindingSupported (\r | |
64 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
65 | IN EFI_HANDLE ControllerHandle,\r | |
66 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
67 | )\r | |
68 | {\r | |
69 | EFI_STATUS Status;\r | |
70 | EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;\r | |
71 | EFI_DISK_IO_PROTOCOL *DiskIo;\r | |
72 | EFI_DEV_PATH *Node;\r | |
73 | \r | |
9be29006 | 74 | //\r |
75 | // Check RemainingDevicePath validation\r | |
76 | //\r | |
adbcbf8f | 77 | if (RemainingDevicePath != NULL) {\r |
9be29006 | 78 | //\r |
d1102dba | 79 | // Check if RemainingDevicePath is the End of Device Path Node,\r |
9be29006 | 80 | // if yes, go on checking other conditions\r |
81 | //\r | |
82 | if (!IsDevicePathEnd (RemainingDevicePath)) {\r | |
83 | //\r | |
84 | // If RemainingDevicePath isn't the End of Device Path Node,\r | |
85 | // check its validation\r | |
86 | //\r | |
87 | Node = (EFI_DEV_PATH *) RemainingDevicePath;\r | |
88 | if (Node->DevPath.Type != MEDIA_DEVICE_PATH ||\r | |
adbcbf8f | 89 | Node->DevPath.SubType != MEDIA_HARDDRIVE_DP ||\r |
9be29006 | 90 | DevicePathNodeLength (&Node->DevPath) != sizeof (HARDDRIVE_DEVICE_PATH)) {\r |
490b5ea1 | 91 | return EFI_UNSUPPORTED;\r |
9be29006 | 92 | }\r |
adbcbf8f | 93 | }\r |
94 | }\r | |
9be29006 | 95 | \r |
adbcbf8f | 96 | //\r |
97 | // Open the IO Abstraction(s) needed to perform the supported test\r | |
98 | //\r | |
99 | Status = gBS->OpenProtocol (\r | |
100 | ControllerHandle,\r | |
9be29006 | 101 | &gEfiDiskIoProtocolGuid,\r |
102 | (VOID **) &DiskIo,\r | |
adbcbf8f | 103 | This->DriverBindingHandle,\r |
104 | ControllerHandle,\r | |
105 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
106 | );\r | |
107 | if (Status == EFI_ALREADY_STARTED) {\r | |
108 | return EFI_SUCCESS;\r | |
109 | }\r | |
adbcbf8f | 110 | if (EFI_ERROR (Status)) {\r |
111 | return Status;\r | |
112 | }\r | |
113 | //\r | |
114 | // Close the I/O Abstraction(s) used to perform the supported test\r | |
115 | //\r | |
116 | gBS->CloseProtocol (\r | |
ff61847d | 117 | ControllerHandle,\r |
9be29006 | 118 | &gEfiDiskIoProtocolGuid,\r |
ff61847d | 119 | This->DriverBindingHandle,\r |
120 | ControllerHandle\r | |
121 | );\r | |
adbcbf8f | 122 | \r |
123 | //\r | |
9be29006 | 124 | // Open the EFI Device Path protocol needed to perform the supported test\r |
adbcbf8f | 125 | //\r |
126 | Status = gBS->OpenProtocol (\r | |
127 | ControllerHandle,\r | |
9be29006 | 128 | &gEfiDevicePathProtocolGuid,\r |
129 | (VOID **) &ParentDevicePath,\r | |
adbcbf8f | 130 | This->DriverBindingHandle,\r |
131 | ControllerHandle,\r | |
132 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
133 | );\r | |
134 | if (Status == EFI_ALREADY_STARTED) {\r | |
135 | return EFI_SUCCESS;\r | |
136 | }\r | |
137 | \r | |
138 | if (EFI_ERROR (Status)) {\r | |
139 | return Status;\r | |
140 | }\r | |
9be29006 | 141 | \r |
adbcbf8f | 142 | //\r |
9be29006 | 143 | // Close protocol, don't use device path protocol in the Support() function\r |
adbcbf8f | 144 | //\r |
145 | gBS->CloseProtocol (\r | |
146 | ControllerHandle,\r | |
9be29006 | 147 | &gEfiDevicePathProtocolGuid,\r |
adbcbf8f | 148 | This->DriverBindingHandle,\r |
149 | ControllerHandle\r | |
150 | );\r | |
151 | \r | |
152 | //\r | |
153 | // Open the IO Abstraction(s) needed to perform the supported test\r | |
154 | //\r | |
155 | Status = gBS->OpenProtocol (\r | |
156 | ControllerHandle,\r | |
157 | &gEfiBlockIoProtocolGuid,\r | |
158 | NULL,\r | |
159 | This->DriverBindingHandle,\r | |
160 | ControllerHandle,\r | |
161 | EFI_OPEN_PROTOCOL_TEST_PROTOCOL\r | |
162 | );\r | |
21e1018b | 163 | \r |
69c0fbd2 | 164 | return Status;\r |
adbcbf8f | 165 | }\r |
166 | \r | |
adbcbf8f | 167 | /**\r |
490b5ea1 | 168 | Start this driver on ControllerHandle by opening a Block IO or a Block IO2\r |
169 | or both, and Disk IO protocol, reading Device Path, and creating a child\r | |
170 | handle with a Disk IO and device path protocol.\r | |
adbcbf8f | 171 | \r |
490b5ea1 | 172 | @param[in] This Protocol instance pointer.\r |
173 | @param[in] ControllerHandle Handle of device to bind driver to\r | |
174 | @param[in] RemainingDevicePath Optional parameter use to pick a specific child\r | |
175 | device to start.\r | |
adbcbf8f | 176 | \r |
177 | @retval EFI_SUCCESS This driver is added to ControllerHandle\r | |
178 | @retval EFI_ALREADY_STARTED This driver is already running on ControllerHandle\r | |
179 | @retval other This driver does not support this device\r | |
180 | \r | |
181 | **/\r | |
182 | EFI_STATUS\r | |
183 | EFIAPI\r | |
184 | PartitionDriverBindingStart (\r | |
185 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
186 | IN EFI_HANDLE ControllerHandle,\r | |
187 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
188 | )\r | |
189 | {\r | |
190 | EFI_STATUS Status;\r | |
191 | EFI_STATUS OpenStatus;\r | |
192 | EFI_BLOCK_IO_PROTOCOL *BlockIo;\r | |
490b5ea1 | 193 | EFI_BLOCK_IO2_PROTOCOL *BlockIo2;\r |
adbcbf8f | 194 | EFI_DISK_IO_PROTOCOL *DiskIo;\r |
493d8e3a | 195 | EFI_DISK_IO2_PROTOCOL *DiskIo2;\r |
adbcbf8f | 196 | EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;\r |
197 | PARTITION_DETECT_ROUTINE *Routine;\r | |
9afd0514 | 198 | BOOLEAN MediaPresent;\r |
15cc67e6 | 199 | EFI_TPL OldTpl;\r |
adbcbf8f | 200 | \r |
21e1018b | 201 | BlockIo2 = NULL;\r |
d1102dba | 202 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r |
9be29006 | 203 | //\r |
204 | // Check RemainingDevicePath validation\r | |
205 | //\r | |
206 | if (RemainingDevicePath != NULL) {\r | |
207 | //\r | |
d1102dba | 208 | // Check if RemainingDevicePath is the End of Device Path Node,\r |
9be29006 | 209 | // if yes, return EFI_SUCCESS\r |
210 | //\r | |
211 | if (IsDevicePathEnd (RemainingDevicePath)) {\r | |
15cc67e6 | 212 | Status = EFI_SUCCESS;\r |
213 | goto Exit;\r | |
9be29006 | 214 | }\r |
215 | }\r | |
216 | \r | |
490b5ea1 | 217 | //\r |
218 | // Try to open BlockIO and BlockIO2. If BlockIO would be opened, continue,\r | |
219 | // otherwise, return error.\r | |
220 | //\r | |
adbcbf8f | 221 | Status = gBS->OpenProtocol (\r |
222 | ControllerHandle,\r | |
223 | &gEfiBlockIoProtocolGuid,\r | |
224 | (VOID **) &BlockIo,\r | |
225 | This->DriverBindingHandle,\r | |
226 | ControllerHandle,\r | |
227 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
228 | );\r | |
229 | if (EFI_ERROR (Status)) {\r | |
15cc67e6 | 230 | goto Exit;\r |
adbcbf8f | 231 | }\r |
490b5ea1 | 232 | \r |
233 | Status = gBS->OpenProtocol (\r | |
234 | ControllerHandle,\r | |
235 | &gEfiBlockIo2ProtocolGuid,\r | |
236 | (VOID **) &BlockIo2,\r | |
237 | This->DriverBindingHandle,\r | |
238 | ControllerHandle,\r | |
493d8e3a | 239 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r |
490b5ea1 | 240 | );\r |
493d8e3a RN |
241 | if (EFI_ERROR (Status)) {\r |
242 | BlockIo2 = NULL;\r | |
243 | }\r | |
490b5ea1 | 244 | \r |
adbcbf8f | 245 | //\r |
490b5ea1 | 246 | // Get the Device Path Protocol on ControllerHandle's handle.\r |
adbcbf8f | 247 | //\r |
248 | Status = gBS->OpenProtocol (\r | |
249 | ControllerHandle,\r | |
250 | &gEfiDevicePathProtocolGuid,\r | |
251 | (VOID **) &ParentDevicePath,\r | |
252 | This->DriverBindingHandle,\r | |
253 | ControllerHandle,\r | |
254 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
255 | );\r | |
256 | if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {\r | |
15cc67e6 | 257 | goto Exit;\r |
adbcbf8f | 258 | }\r |
259 | \r | |
493d8e3a RN |
260 | //\r |
261 | // Get the DiskIo and DiskIo2.\r | |
262 | //\r | |
adbcbf8f | 263 | Status = gBS->OpenProtocol (\r |
264 | ControllerHandle,\r | |
265 | &gEfiDiskIoProtocolGuid,\r | |
266 | (VOID **) &DiskIo,\r | |
267 | This->DriverBindingHandle,\r | |
268 | ControllerHandle,\r | |
269 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
270 | );\r | |
271 | if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {\r | |
272 | gBS->CloseProtocol (\r | |
273 | ControllerHandle,\r | |
274 | &gEfiDevicePathProtocolGuid,\r | |
275 | This->DriverBindingHandle,\r | |
276 | ControllerHandle\r | |
277 | );\r | |
15cc67e6 | 278 | goto Exit;\r |
adbcbf8f | 279 | }\r |
280 | \r | |
281 | OpenStatus = Status;\r | |
282 | \r | |
493d8e3a RN |
283 | Status = gBS->OpenProtocol (\r |
284 | ControllerHandle,\r | |
285 | &gEfiDiskIo2ProtocolGuid,\r | |
286 | (VOID **) &DiskIo2,\r | |
287 | This->DriverBindingHandle,\r | |
288 | ControllerHandle,\r | |
289 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
290 | );\r | |
291 | if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {\r | |
292 | DiskIo2 = NULL;\r | |
293 | }\r | |
294 | \r | |
adbcbf8f | 295 | //\r |
9afd0514 | 296 | // Try to read blocks when there's media or it is removable physical partition.\r |
adbcbf8f | 297 | //\r |
9afd0514 | 298 | Status = EFI_UNSUPPORTED;\r |
299 | MediaPresent = BlockIo->Media->MediaPresent;\r | |
300 | if (BlockIo->Media->MediaPresent ||\r | |
301 | (BlockIo->Media->RemovableMedia && !BlockIo->Media->LogicalPartition)) {\r | |
adbcbf8f | 302 | //\r |
01a68fd3 HW |
303 | // Try for GPT, then legacy MBR partition types, and then UDF and El Torito.\r |
304 | // If the media supports a given partition type install child handles to\r | |
305 | // represent the partitions described by the media.\r | |
adbcbf8f | 306 | //\r |
307 | Routine = &mPartitionDetectRoutineTable[0];\r | |
308 | while (*Routine != NULL) {\r | |
309 | Status = (*Routine) (\r | |
310 | This,\r | |
311 | ControllerHandle,\r | |
312 | DiskIo,\r | |
493d8e3a | 313 | DiskIo2,\r |
adbcbf8f | 314 | BlockIo,\r |
490b5ea1 | 315 | BlockIo2,\r |
adbcbf8f | 316 | ParentDevicePath\r |
317 | );\r | |
9afd0514 | 318 | if (!EFI_ERROR (Status) || Status == EFI_MEDIA_CHANGED || Status == EFI_NO_MEDIA) {\r |
adbcbf8f | 319 | break;\r |
320 | }\r | |
321 | Routine++;\r | |
322 | }\r | |
323 | }\r | |
324 | //\r | |
325 | // In the case that the driver is already started (OpenStatus == EFI_ALREADY_STARTED),\r | |
326 | // the DevicePathProtocol and the DiskIoProtocol are not actually opened by the\r | |
327 | // driver. So don't try to close them. Otherwise, we will break the dependency\r | |
328 | // between the controller and the driver set up before.\r | |
329 | //\r | |
d1102dba | 330 | // In the case that when the media changes on a device it will Reinstall the\r |
9afd0514 | 331 | // BlockIo interaface. This will cause a call to our Stop(), and a subsequent\r |
332 | // reentrant call to our Start() successfully. We should leave the device open\r | |
333 | // when this happen. The "media change" case includes either the status is\r | |
d1102dba LG |
334 | // EFI_MEDIA_CHANGED or it is a "media" to "no media" change.\r |
335 | //\r | |
9afd0514 | 336 | if (EFI_ERROR (Status) &&\r |
337 | !EFI_ERROR (OpenStatus) &&\r | |
338 | Status != EFI_MEDIA_CHANGED &&\r | |
339 | !(MediaPresent && Status == EFI_NO_MEDIA)) {\r | |
adbcbf8f | 340 | gBS->CloseProtocol (\r |
341 | ControllerHandle,\r | |
342 | &gEfiDiskIoProtocolGuid,\r | |
343 | This->DriverBindingHandle,\r | |
344 | ControllerHandle\r | |
345 | );\r | |
490b5ea1 | 346 | //\r |
80c83a69 | 347 | // Close Parent DiskIo2 if has.\r |
d1102dba | 348 | //\r |
490b5ea1 | 349 | gBS->CloseProtocol (\r |
350 | ControllerHandle,\r | |
80c83a69 | 351 | &gEfiDiskIo2ProtocolGuid,\r |
490b5ea1 | 352 | This->DriverBindingHandle,\r |
353 | ControllerHandle\r | |
354 | );\r | |
adbcbf8f | 355 | \r |
356 | gBS->CloseProtocol (\r | |
357 | ControllerHandle,\r | |
358 | &gEfiDevicePathProtocolGuid,\r | |
359 | This->DriverBindingHandle,\r | |
360 | ControllerHandle\r | |
361 | );\r | |
362 | }\r | |
363 | \r | |
15cc67e6 | 364 | Exit:\r |
365 | gBS->RestoreTPL (OldTpl);\r | |
adbcbf8f | 366 | return Status;\r |
367 | }\r | |
368 | \r | |
adbcbf8f | 369 | /**\r |
48557c65 | 370 | Stop this driver on ControllerHandle. Support stopping any child handles\r |
adbcbf8f | 371 | created by this driver.\r |
372 | \r | |
373 | @param This Protocol instance pointer.\r | |
374 | @param ControllerHandle Handle of device to stop driver on\r | |
375 | @param NumberOfChildren Number of Handles in ChildHandleBuffer. If number of\r | |
376 | children is zero stop the entire bus driver.\r | |
377 | @param ChildHandleBuffer List of Child Handles to Stop.\r | |
378 | \r | |
379 | @retval EFI_SUCCESS This driver is removed ControllerHandle\r | |
380 | @retval other This driver was not removed from this device\r | |
381 | \r | |
382 | **/\r | |
383 | EFI_STATUS\r | |
384 | EFIAPI\r | |
385 | PartitionDriverBindingStop (\r | |
386 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
387 | IN EFI_HANDLE ControllerHandle,\r | |
388 | IN UINTN NumberOfChildren,\r | |
389 | IN EFI_HANDLE *ChildHandleBuffer\r | |
390 | )\r | |
391 | {\r | |
392 | EFI_STATUS Status;\r | |
393 | UINTN Index;\r | |
394 | EFI_BLOCK_IO_PROTOCOL *BlockIo;\r | |
490b5ea1 | 395 | EFI_BLOCK_IO2_PROTOCOL *BlockIo2;\r |
adbcbf8f | 396 | BOOLEAN AllChildrenStopped;\r |
397 | PARTITION_PRIVATE_DATA *Private;\r | |
398 | EFI_DISK_IO_PROTOCOL *DiskIo;\r | |
709c9fd5 | 399 | EFI_GUID *TypeGuid;\r |
adbcbf8f | 400 | \r |
490b5ea1 | 401 | BlockIo = NULL;\r |
402 | BlockIo2 = NULL;\r | |
403 | Private = NULL;\r | |
404 | \r | |
adbcbf8f | 405 | if (NumberOfChildren == 0) {\r |
e3325721 HW |
406 | //\r |
407 | // In the case of re-entry of the PartitionDriverBindingStop, the\r | |
408 | // NumberOfChildren may not reflect the actual number of children on the\r | |
409 | // bus driver. Hence, additional check is needed here.\r | |
410 | //\r | |
411 | if (HasChildren (ControllerHandle)) {\r | |
412 | DEBUG((EFI_D_ERROR, "PartitionDriverBindingStop: Still has child.\n"));\r | |
413 | return EFI_DEVICE_ERROR;\r | |
414 | }\r | |
415 | \r | |
adbcbf8f | 416 | //\r |
417 | // Close the bus driver\r | |
418 | //\r | |
419 | gBS->CloseProtocol (\r | |
420 | ControllerHandle,\r | |
421 | &gEfiDiskIoProtocolGuid,\r | |
422 | This->DriverBindingHandle,\r | |
423 | ControllerHandle\r | |
424 | );\r | |
490b5ea1 | 425 | //\r |
426 | // Close Parent BlockIO2 if has.\r | |
d1102dba | 427 | //\r |
490b5ea1 | 428 | gBS->CloseProtocol (\r |
429 | ControllerHandle,\r | |
493d8e3a | 430 | &gEfiDiskIo2ProtocolGuid,\r |
490b5ea1 | 431 | This->DriverBindingHandle,\r |
432 | ControllerHandle\r | |
433 | );\r | |
adbcbf8f | 434 | \r |
435 | gBS->CloseProtocol (\r | |
436 | ControllerHandle,\r | |
437 | &gEfiDevicePathProtocolGuid,\r | |
438 | This->DriverBindingHandle,\r | |
439 | ControllerHandle\r | |
440 | );\r | |
adbcbf8f | 441 | return EFI_SUCCESS;\r |
442 | }\r | |
443 | \r | |
444 | AllChildrenStopped = TRUE;\r | |
445 | for (Index = 0; Index < NumberOfChildren; Index++) {\r | |
490b5ea1 | 446 | gBS->OpenProtocol (\r |
447 | ChildHandleBuffer[Index],\r | |
448 | &gEfiBlockIoProtocolGuid,\r | |
449 | (VOID **) &BlockIo,\r | |
450 | This->DriverBindingHandle,\r | |
451 | ControllerHandle,\r | |
452 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
453 | );\r | |
454 | //\r | |
455 | // Try to locate BlockIo2.\r | |
456 | //\r | |
457 | gBS->OpenProtocol (\r | |
458 | ChildHandleBuffer[Index],\r | |
459 | &gEfiBlockIo2ProtocolGuid,\r | |
460 | (VOID **) &BlockIo2,\r | |
461 | This->DriverBindingHandle,\r | |
462 | ControllerHandle,\r | |
463 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
d1102dba | 464 | );\r |
490b5ea1 | 465 | \r |
d0844d13 | 466 | \r |
467 | Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (BlockIo);\r | |
e3325721 HW |
468 | if (Private->InStop) {\r |
469 | //\r | |
470 | // If the child handle is going to be stopped again during the re-entry\r | |
471 | // of DriverBindingStop, just do nothing.\r | |
472 | //\r | |
473 | break;\r | |
474 | }\r | |
475 | Private->InStop = TRUE;\r | |
adbcbf8f | 476 | \r |
e3325721 HW |
477 | BlockIo->FlushBlocks (BlockIo);\r |
478 | \r | |
479 | if (BlockIo2 != NULL) {\r | |
480 | Status = BlockIo2->FlushBlocksEx (BlockIo2, NULL);\r | |
481 | DEBUG((EFI_D_ERROR, "PartitionDriverBindingStop: FlushBlocksEx returned with %r\n", Status));\r | |
482 | } else {\r | |
483 | Status = EFI_SUCCESS;\r | |
484 | }\r | |
485 | \r | |
486 | gBS->CloseProtocol (\r | |
487 | ControllerHandle,\r | |
488 | &gEfiDiskIoProtocolGuid,\r | |
489 | This->DriverBindingHandle,\r | |
490 | ChildHandleBuffer[Index]\r | |
491 | );\r | |
709c9fd5 JB |
492 | \r |
493 | if (IsZeroGuid (&Private->TypeGuid)) {\r | |
494 | TypeGuid = NULL;\r | |
495 | } else {\r | |
496 | TypeGuid = &Private->TypeGuid;\r | |
497 | }\r | |
498 | \r | |
490b5ea1 | 499 | //\r |
500 | // All Software protocols have be freed from the handle so remove it.\r | |
501 | // Remove the BlockIo Protocol if has.\r | |
502 | // Remove the BlockIo2 Protocol if has.\r | |
503 | //\r | |
504 | if (BlockIo2 != NULL) {\r | |
e3325721 HW |
505 | //\r |
506 | // Some device drivers might re-install the BlockIO(2) protocols for a\r | |
507 | // media change condition. Therefore, if the FlushBlocksEx returned with\r | |
508 | // EFI_MEDIA_CHANGED, just let the BindingStop fail to avoid potential\r | |
509 | // reference of already stopped child handle.\r | |
510 | //\r | |
511 | if (Status != EFI_MEDIA_CHANGED) {\r | |
512 | Status = gBS->UninstallMultipleProtocolInterfaces (\r | |
513 | ChildHandleBuffer[Index],\r | |
514 | &gEfiDevicePathProtocolGuid,\r | |
515 | Private->DevicePath,\r | |
516 | &gEfiBlockIoProtocolGuid,\r | |
517 | &Private->BlockIo,\r | |
518 | &gEfiBlockIo2ProtocolGuid,\r | |
519 | &Private->BlockIo2,\r | |
3a3d62d2 HW |
520 | &gEfiPartitionInfoProtocolGuid,\r |
521 | &Private->PartitionInfo,\r | |
709c9fd5 | 522 | TypeGuid,\r |
e3325721 HW |
523 | NULL,\r |
524 | NULL\r | |
525 | );\r | |
526 | }\r | |
490b5ea1 | 527 | } else {\r |
490b5ea1 | 528 | Status = gBS->UninstallMultipleProtocolInterfaces (\r |
529 | ChildHandleBuffer[Index],\r | |
530 | &gEfiDevicePathProtocolGuid,\r | |
531 | Private->DevicePath,\r | |
532 | &gEfiBlockIoProtocolGuid,\r | |
533 | &Private->BlockIo,\r | |
3a3d62d2 HW |
534 | &gEfiPartitionInfoProtocolGuid,\r |
535 | &Private->PartitionInfo,\r | |
709c9fd5 | 536 | TypeGuid,\r |
490b5ea1 | 537 | NULL,\r |
538 | NULL\r | |
539 | );\r | |
540 | }\r | |
adbcbf8f | 541 | \r |
490b5ea1 | 542 | if (EFI_ERROR (Status)) {\r |
e3325721 | 543 | Private->InStop = FALSE;\r |
490b5ea1 | 544 | gBS->OpenProtocol (\r |
545 | ControllerHandle,\r | |
546 | &gEfiDiskIoProtocolGuid,\r | |
547 | (VOID **) &DiskIo,\r | |
548 | This->DriverBindingHandle,\r | |
549 | ChildHandleBuffer[Index],\r | |
550 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r | |
551 | );\r | |
552 | } else {\r | |
553 | FreePool (Private->DevicePath);\r | |
554 | FreePool (Private);\r | |
adbcbf8f | 555 | }\r |
556 | \r | |
557 | if (EFI_ERROR (Status)) {\r | |
558 | AllChildrenStopped = FALSE;\r | |
e3325721 HW |
559 | if (Status == EFI_MEDIA_CHANGED) {\r |
560 | break;\r | |
561 | }\r | |
adbcbf8f | 562 | }\r |
563 | }\r | |
564 | \r | |
565 | if (!AllChildrenStopped) {\r | |
566 | return EFI_DEVICE_ERROR;\r | |
567 | }\r | |
568 | \r | |
569 | return EFI_SUCCESS;\r | |
570 | }\r | |
571 | \r | |
572 | \r | |
573 | /**\r | |
574 | Reset the Block Device.\r | |
575 | \r | |
576 | @param This Protocol instance pointer.\r | |
577 | @param ExtendedVerification Driver may perform diagnostics on reset.\r | |
578 | \r | |
579 | @retval EFI_SUCCESS The device was reset.\r | |
580 | @retval EFI_DEVICE_ERROR The device is not functioning properly and could\r | |
581 | not be reset.\r | |
582 | \r | |
583 | **/\r | |
adbcbf8f | 584 | EFI_STATUS\r |
585 | EFIAPI\r | |
586 | PartitionReset (\r | |
587 | IN EFI_BLOCK_IO_PROTOCOL *This,\r | |
588 | IN BOOLEAN ExtendedVerification\r | |
589 | )\r | |
590 | {\r | |
591 | PARTITION_PRIVATE_DATA *Private;\r | |
592 | \r | |
593 | Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (This);\r | |
594 | \r | |
595 | return Private->ParentBlockIo->Reset (\r | |
596 | Private->ParentBlockIo,\r | |
597 | ExtendedVerification\r | |
598 | );\r | |
599 | }\r | |
600 | \r | |
fcf5e49d RN |
601 | /**\r |
602 | Probe the media status and return EFI_NO_MEDIA or EFI_MEDIA_CHANGED\r | |
603 | for no media or media change case. Otherwise DefaultStatus is returned.\r | |
604 | \r | |
605 | @param DiskIo Pointer to the DiskIo instance.\r | |
606 | @param MediaId Id of the media, changes every time the media is replaced.\r | |
607 | @param DefaultStatus The default status to return when it's not the no media\r | |
608 | or media change case.\r | |
609 | \r | |
610 | @retval EFI_NO_MEDIA There is no media.\r | |
611 | @retval EFI_MEDIA_CHANGED The media was changed.\r | |
612 | @retval others The default status to return.\r | |
613 | **/\r | |
614 | EFI_STATUS\r | |
615 | ProbeMediaStatus (\r | |
616 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
617 | IN UINT32 MediaId,\r | |
618 | IN EFI_STATUS DefaultStatus\r | |
619 | )\r | |
620 | {\r | |
621 | EFI_STATUS Status;\r | |
df473cc1 | 622 | UINT8 Buffer[1];\r |
fcf5e49d RN |
623 | \r |
624 | //\r | |
df473cc1 RC |
625 | // Read 1 byte from offset 0 to check if the MediaId is still valid.\r |
626 | // The reading operation is synchronious thus it is not worth it to\r | |
627 | // allocate a buffer from the pool. The destination buffer for the\r | |
628 | // data is in the stack.\r | |
fcf5e49d | 629 | //\r |
df473cc1 | 630 | Status = DiskIo->ReadDisk (DiskIo, MediaId, 0, 1, (VOID*)Buffer);\r |
fcf5e49d RN |
631 | if ((Status == EFI_NO_MEDIA) || (Status == EFI_MEDIA_CHANGED)) {\r |
632 | return Status;\r | |
633 | }\r | |
634 | return DefaultStatus;\r | |
635 | }\r | |
adbcbf8f | 636 | \r |
637 | /**\r | |
638 | Read by using the Disk IO protocol on the parent device. Lba addresses\r | |
639 | must be converted to byte offsets.\r | |
640 | \r | |
641 | @param This Protocol instance pointer.\r | |
642 | @param MediaId Id of the media, changes every time the media is replaced.\r | |
643 | @param Lba The starting Logical Block Address to read from\r | |
644 | @param BufferSize Size of Buffer, must be a multiple of device block size.\r | |
645 | @param Buffer Buffer containing read data\r | |
646 | \r | |
647 | @retval EFI_SUCCESS The data was read correctly from the device.\r | |
648 | @retval EFI_DEVICE_ERROR The device reported an error while performing the read.\r | |
649 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
650 | @retval EFI_MEDIA_CHANGED The MediaId does not matched the current device.\r | |
651 | @retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.\r | |
652 | @retval EFI_INVALID_PARAMETER The read request contains device addresses that are not\r | |
653 | valid for the device.\r | |
654 | \r | |
655 | **/\r | |
adbcbf8f | 656 | EFI_STATUS\r |
657 | EFIAPI\r | |
658 | PartitionReadBlocks (\r | |
659 | IN EFI_BLOCK_IO_PROTOCOL *This,\r | |
660 | IN UINT32 MediaId,\r | |
661 | IN EFI_LBA Lba,\r | |
662 | IN UINTN BufferSize,\r | |
663 | OUT VOID *Buffer\r | |
664 | )\r | |
665 | {\r | |
666 | PARTITION_PRIVATE_DATA *Private;\r | |
667 | UINT64 Offset;\r | |
668 | \r | |
669 | Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (This);\r | |
670 | \r | |
671 | if (BufferSize % Private->BlockSize != 0) {\r | |
fcf5e49d | 672 | return ProbeMediaStatus (Private->DiskIo, MediaId, EFI_BAD_BUFFER_SIZE);\r |
adbcbf8f | 673 | }\r |
674 | \r | |
675 | Offset = MultU64x32 (Lba, Private->BlockSize) + Private->Start;\r | |
676 | if (Offset + BufferSize > Private->End) {\r | |
fcf5e49d | 677 | return ProbeMediaStatus (Private->DiskIo, MediaId, EFI_INVALID_PARAMETER);\r |
adbcbf8f | 678 | }\r |
679 | //\r | |
680 | // Because some kinds of partition have different block size from their parent\r | |
681 | // device, we call the Disk IO protocol on the parent device, not the Block IO\r | |
682 | // protocol\r | |
683 | //\r | |
684 | return Private->DiskIo->ReadDisk (Private->DiskIo, MediaId, Offset, BufferSize, Buffer);\r | |
685 | }\r | |
686 | \r | |
687 | /**\r | |
688 | Write by using the Disk IO protocol on the parent device. Lba addresses\r | |
689 | must be converted to byte offsets.\r | |
690 | \r | |
490b5ea1 | 691 | @param[in] This Protocol instance pointer.\r |
692 | @param[in] MediaId Id of the media, changes every time the media is replaced.\r | |
693 | @param[in] Lba The starting Logical Block Address to read from\r | |
694 | @param[in] BufferSize Size of Buffer, must be a multiple of device block size.\r | |
695 | @param[in] Buffer Buffer containing data to be written to device.\r | |
adbcbf8f | 696 | \r |
697 | @retval EFI_SUCCESS The data was written correctly to the device.\r | |
698 | @retval EFI_WRITE_PROTECTED The device can not be written to.\r | |
699 | @retval EFI_DEVICE_ERROR The device reported an error while performing the write.\r | |
700 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
701 | @retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device.\r | |
702 | @retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.\r | |
703 | @retval EFI_INVALID_PARAMETER The write request contains a LBA that is not\r | |
704 | valid for the device.\r | |
705 | \r | |
706 | **/\r | |
adbcbf8f | 707 | EFI_STATUS\r |
708 | EFIAPI\r | |
709 | PartitionWriteBlocks (\r | |
710 | IN EFI_BLOCK_IO_PROTOCOL *This,\r | |
711 | IN UINT32 MediaId,\r | |
712 | IN EFI_LBA Lba,\r | |
713 | IN UINTN BufferSize,\r | |
490b5ea1 | 714 | IN VOID *Buffer\r |
adbcbf8f | 715 | )\r |
716 | {\r | |
717 | PARTITION_PRIVATE_DATA *Private;\r | |
718 | UINT64 Offset;\r | |
719 | \r | |
720 | Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (This);\r | |
721 | \r | |
722 | if (BufferSize % Private->BlockSize != 0) {\r | |
fcf5e49d | 723 | return ProbeMediaStatus (Private->DiskIo, MediaId, EFI_BAD_BUFFER_SIZE);\r |
adbcbf8f | 724 | }\r |
725 | \r | |
726 | Offset = MultU64x32 (Lba, Private->BlockSize) + Private->Start;\r | |
727 | if (Offset + BufferSize > Private->End) {\r | |
fcf5e49d | 728 | return ProbeMediaStatus (Private->DiskIo, MediaId, EFI_INVALID_PARAMETER);\r |
adbcbf8f | 729 | }\r |
730 | //\r | |
731 | // Because some kinds of partition have different block size from their parent\r | |
732 | // device, we call the Disk IO protocol on the parent device, not the Block IO\r | |
733 | // protocol\r | |
734 | //\r | |
735 | return Private->DiskIo->WriteDisk (Private->DiskIo, MediaId, Offset, BufferSize, Buffer);\r | |
736 | }\r | |
737 | \r | |
738 | \r | |
739 | /**\r | |
740 | Flush the parent Block Device.\r | |
741 | \r | |
742 | @param This Protocol instance pointer.\r | |
743 | \r | |
744 | @retval EFI_SUCCESS All outstanding data was written to the device\r | |
745 | @retval EFI_DEVICE_ERROR The device reported an error while writting back the data\r | |
746 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
747 | \r | |
748 | **/\r | |
adbcbf8f | 749 | EFI_STATUS\r |
750 | EFIAPI\r | |
751 | PartitionFlushBlocks (\r | |
752 | IN EFI_BLOCK_IO_PROTOCOL *This\r | |
753 | )\r | |
754 | {\r | |
755 | PARTITION_PRIVATE_DATA *Private;\r | |
756 | \r | |
757 | Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (This);\r | |
758 | \r | |
759 | return Private->ParentBlockIo->FlushBlocks (Private->ParentBlockIo);\r | |
760 | }\r | |
761 | \r | |
65fd3952 RN |
762 | /**\r |
763 | Probe the media status and return EFI_NO_MEDIA or EFI_MEDIA_CHANGED\r | |
764 | for no media or media change case. Otherwise DefaultStatus is returned.\r | |
765 | \r | |
493d8e3a | 766 | @param DiskIo2 Pointer to the DiskIo2 instance.\r |
65fd3952 RN |
767 | @param MediaId Id of the media, changes every time the media is replaced.\r |
768 | @param DefaultStatus The default status to return when it's not the no media\r | |
769 | or media change case.\r | |
770 | \r | |
771 | @retval EFI_NO_MEDIA There is no media.\r | |
772 | @retval EFI_MEDIA_CHANGED The media was changed.\r | |
773 | @retval others The default status to return.\r | |
774 | **/\r | |
775 | EFI_STATUS\r | |
776 | ProbeMediaStatusEx (\r | |
493d8e3a | 777 | IN EFI_DISK_IO2_PROTOCOL *DiskIo2,\r |
65fd3952 RN |
778 | IN UINT32 MediaId,\r |
779 | IN EFI_STATUS DefaultStatus\r | |
780 | )\r | |
781 | {\r | |
782 | EFI_STATUS Status;\r | |
68599525 | 783 | UINT8 Buffer[1];\r |
65fd3952 RN |
784 | \r |
785 | //\r | |
68599525 RN |
786 | // Read 1 byte from offset 0 to check if the MediaId is still valid.\r |
787 | // The reading operation is synchronious thus it is not worth it to\r | |
788 | // allocate a buffer from the pool. The destination buffer for the\r | |
789 | // data is in the stack.\r | |
65fd3952 | 790 | //\r |
68599525 | 791 | Status = DiskIo2->ReadDiskEx (DiskIo2, MediaId, 0, NULL, 1, (VOID*)Buffer);\r |
65fd3952 RN |
792 | if ((Status == EFI_NO_MEDIA) || (Status == EFI_MEDIA_CHANGED)) {\r |
793 | return Status;\r | |
794 | }\r | |
795 | return DefaultStatus;\r | |
796 | }\r | |
797 | \r | |
490b5ea1 | 798 | /**\r |
799 | Reset the Block Device throught Block I/O2 protocol.\r | |
800 | \r | |
801 | @param This Protocol instance pointer.\r | |
802 | @param ExtendedVerification Driver may perform diagnostics on reset.\r | |
803 | \r | |
804 | @retval EFI_SUCCESS The device was reset.\r | |
805 | @retval EFI_DEVICE_ERROR The device is not functioning properly and could\r | |
806 | not be reset.\r | |
807 | \r | |
808 | **/\r | |
809 | EFI_STATUS\r | |
810 | EFIAPI\r | |
811 | PartitionResetEx (\r | |
812 | IN EFI_BLOCK_IO2_PROTOCOL *This,\r | |
813 | IN BOOLEAN ExtendedVerification\r | |
814 | )\r | |
815 | {\r | |
816 | PARTITION_PRIVATE_DATA *Private;\r | |
817 | \r | |
818 | Private = PARTITION_DEVICE_FROM_BLOCK_IO2_THIS (This);\r | |
819 | \r | |
820 | return Private->ParentBlockIo2->Reset (\r | |
821 | Private->ParentBlockIo2,\r | |
822 | ExtendedVerification\r | |
823 | );\r | |
824 | }\r | |
825 | \r | |
493d8e3a RN |
826 | /**\r |
827 | The general callback for the DiskIo2 interfaces.\r | |
828 | @param Event Event whose notification function is being invoked.\r | |
829 | @param Context The pointer to the notification function's context,\r | |
830 | which points to the PARTITION_ACCESS_TASK instance.\r | |
831 | **/\r | |
832 | VOID\r | |
833 | EFIAPI\r | |
834 | PartitionOnAccessComplete (\r | |
835 | IN EFI_EVENT Event,\r | |
836 | IN VOID *Context\r | |
837 | )\r | |
838 | {\r | |
839 | PARTITION_ACCESS_TASK *Task;\r | |
840 | \r | |
841 | Task = (PARTITION_ACCESS_TASK *) Context;\r | |
842 | \r | |
843 | gBS->CloseEvent (Event);\r | |
844 | \r | |
845 | Task->BlockIo2Token->TransactionStatus = Task->DiskIo2Token.TransactionStatus;\r | |
846 | gBS->SignalEvent (Task->BlockIo2Token->Event);\r | |
847 | \r | |
848 | FreePool (Task);\r | |
849 | }\r | |
850 | \r | |
851 | /**\r | |
852 | Create a new PARTITION_ACCESS_TASK instance.\r | |
853 | \r | |
854 | @param Token Pointer to the EFI_BLOCK_IO2_TOKEN.\r | |
855 | \r | |
856 | @return Pointer to the created PARTITION_ACCESS_TASK instance or NULL upon failure.\r | |
857 | **/\r | |
858 | PARTITION_ACCESS_TASK *\r | |
859 | PartitionCreateAccessTask (\r | |
860 | IN EFI_BLOCK_IO2_TOKEN *Token\r | |
861 | )\r | |
862 | {\r | |
863 | EFI_STATUS Status;\r | |
864 | PARTITION_ACCESS_TASK *Task;\r | |
865 | \r | |
866 | Task = AllocatePool (sizeof (*Task));\r | |
867 | if (Task == NULL) {\r | |
868 | return NULL;\r | |
869 | }\r | |
870 | \r | |
871 | Status = gBS->CreateEvent (\r | |
872 | EVT_NOTIFY_SIGNAL,\r | |
80c83a69 | 873 | TPL_NOTIFY,\r |
493d8e3a RN |
874 | PartitionOnAccessComplete,\r |
875 | Task,\r | |
876 | &Task->DiskIo2Token.Event\r | |
877 | );\r | |
878 | if (EFI_ERROR (Status)) {\r | |
879 | FreePool (Task);\r | |
880 | return NULL;\r | |
881 | }\r | |
882 | \r | |
883 | Task->BlockIo2Token = Token;\r | |
884 | \r | |
885 | return Task;\r | |
886 | }\r | |
887 | \r | |
490b5ea1 | 888 | /**\r |
889 | Read BufferSize bytes from Lba into Buffer.\r | |
d1102dba | 890 | \r |
490b5ea1 | 891 | This function reads the requested number of blocks from the device. All the\r |
892 | blocks are read, or an error is returned.\r | |
893 | If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_or EFI_MEDIA_CHANGED is returned and\r | |
894 | non-blocking I/O is being used, the Event associated with this request will\r | |
895 | not be signaled.\r | |
896 | \r | |
897 | @param[in] This Indicates a pointer to the calling context.\r | |
d1102dba | 898 | @param[in] MediaId Id of the media, changes every time the media is\r |
490b5ea1 | 899 | replaced.\r |
900 | @param[in] Lba The starting Logical Block Address to read from.\r | |
d1102dba LG |
901 | @param[in, out] Token A pointer to the token associated with the transaction.\r |
902 | @param[in] BufferSize Size of Buffer, must be a multiple of device block size.\r | |
903 | @param[out] Buffer A pointer to the destination buffer for the data. The\r | |
904 | caller is responsible for either having implicit or\r | |
490b5ea1 | 905 | explicit ownership of the buffer.\r |
906 | \r | |
907 | @retval EFI_SUCCESS The read request was queued if Token->Event is\r | |
908 | not NULL.The data was read correctly from the\r | |
909 | device if the Token->Event is NULL.\r | |
910 | @retval EFI_DEVICE_ERROR The device reported an error while performing\r | |
911 | the read.\r | |
912 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
913 | @retval EFI_MEDIA_CHANGED The MediaId is not for the current media.\r | |
914 | @retval EFI_BAD_BUFFER_SIZE The BufferSize parameter is not a multiple of the\r | |
915 | intrinsic block size of the device.\r | |
d1102dba | 916 | @retval EFI_INVALID_PARAMETER The read request contains LBAs that are not valid,\r |
490b5ea1 | 917 | or the buffer is not on proper alignment.\r |
918 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack\r | |
919 | of resources.\r | |
920 | **/\r | |
921 | EFI_STATUS\r | |
922 | EFIAPI\r | |
923 | PartitionReadBlocksEx (\r | |
924 | IN EFI_BLOCK_IO2_PROTOCOL *This,\r | |
925 | IN UINT32 MediaId,\r | |
926 | IN EFI_LBA Lba,\r | |
927 | IN OUT EFI_BLOCK_IO2_TOKEN *Token,\r | |
928 | IN UINTN BufferSize,\r | |
929 | OUT VOID *Buffer\r | |
930 | )\r | |
931 | {\r | |
493d8e3a | 932 | EFI_STATUS Status;\r |
490b5ea1 | 933 | PARTITION_PRIVATE_DATA *Private;\r |
934 | UINT64 Offset;\r | |
493d8e3a | 935 | PARTITION_ACCESS_TASK *Task;\r |
490b5ea1 | 936 | \r |
65fd3952 RN |
937 | Private = PARTITION_DEVICE_FROM_BLOCK_IO2_THIS (This);\r |
938 | \r | |
490b5ea1 | 939 | if (BufferSize % Private->BlockSize != 0) {\r |
493d8e3a | 940 | return ProbeMediaStatusEx (Private->DiskIo2, MediaId, EFI_BAD_BUFFER_SIZE);\r |
490b5ea1 | 941 | }\r |
942 | \r | |
943 | Offset = MultU64x32 (Lba, Private->BlockSize) + Private->Start;\r | |
944 | if (Offset + BufferSize > Private->End) {\r | |
493d8e3a | 945 | return ProbeMediaStatusEx (Private->DiskIo2, MediaId, EFI_INVALID_PARAMETER);\r |
490b5ea1 | 946 | }\r |
947 | \r | |
493d8e3a RN |
948 | if ((Token != NULL) && (Token->Event != NULL)) {\r |
949 | Task = PartitionCreateAccessTask (Token);\r | |
950 | if (Task == NULL) {\r | |
951 | return EFI_OUT_OF_RESOURCES;\r | |
952 | }\r | |
490b5ea1 | 953 | \r |
493d8e3a RN |
954 | Status = Private->DiskIo2->ReadDiskEx (Private->DiskIo2, MediaId, Offset, &Task->DiskIo2Token, BufferSize, Buffer);\r |
955 | if (EFI_ERROR (Status)) {\r | |
956 | gBS->CloseEvent (Task->DiskIo2Token.Event);\r | |
957 | FreePool (Task);\r | |
958 | }\r | |
959 | } else {\r | |
960 | Status = Private->DiskIo2->ReadDiskEx (Private->DiskIo2, MediaId, Offset, NULL, BufferSize, Buffer);\r | |
490b5ea1 | 961 | }\r |
962 | \r | |
493d8e3a | 963 | return Status;\r |
490b5ea1 | 964 | }\r |
965 | \r | |
966 | /**\r | |
967 | Write BufferSize bytes from Lba into Buffer.\r | |
968 | \r | |
969 | This function writes the requested number of blocks to the device. All blocks\r | |
970 | are written, or an error is returned.If EFI_DEVICE_ERROR, EFI_NO_MEDIA,\r | |
971 | EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED is returned and non-blocking I/O is\r | |
972 | being used, the Event associated with this request will not be signaled.\r | |
973 | \r | |
974 | @param[in] This Indicates a pointer to the calling context.\r | |
975 | @param[in] MediaId The media ID that the write request is for.\r | |
976 | @param[in] Lba The starting logical block address to be written. The\r | |
977 | caller is responsible for writing to only legitimate\r | |
978 | locations.\r | |
979 | @param[in, out] Token A pointer to the token associated with the transaction.\r | |
980 | @param[in] BufferSize Size of Buffer, must be a multiple of device block size.\r | |
981 | @param[in] Buffer A pointer to the source buffer for the data.\r | |
982 | \r | |
983 | @retval EFI_SUCCESS The write request was queued if Event is not NULL.\r | |
984 | The data was written correctly to the device if\r | |
985 | the Event is NULL.\r | |
986 | @retval EFI_WRITE_PROTECTED The device can not be written to.\r | |
987 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
988 | @retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device.\r | |
989 | @retval EFI_DEVICE_ERROR The device reported an error while performing the write.\r | |
990 | @retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.\r | |
d1102dba | 991 | @retval EFI_INVALID_PARAMETER The write request contains LBAs that are not valid,\r |
490b5ea1 | 992 | or the buffer is not on proper alignment.\r |
993 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack\r | |
994 | of resources.\r | |
995 | \r | |
996 | **/\r | |
997 | EFI_STATUS\r | |
998 | EFIAPI\r | |
999 | PartitionWriteBlocksEx (\r | |
1000 | IN EFI_BLOCK_IO2_PROTOCOL *This,\r | |
1001 | IN UINT32 MediaId,\r | |
1002 | IN EFI_LBA Lba,\r | |
1003 | IN OUT EFI_BLOCK_IO2_TOKEN *Token,\r | |
1004 | IN UINTN BufferSize,\r | |
1005 | IN VOID *Buffer\r | |
1006 | )\r | |
1007 | {\r | |
493d8e3a | 1008 | EFI_STATUS Status;\r |
490b5ea1 | 1009 | PARTITION_PRIVATE_DATA *Private;\r |
1010 | UINT64 Offset;\r | |
493d8e3a | 1011 | PARTITION_ACCESS_TASK *Task;\r |
490b5ea1 | 1012 | \r |
65fd3952 RN |
1013 | Private = PARTITION_DEVICE_FROM_BLOCK_IO2_THIS (This);\r |
1014 | \r | |
490b5ea1 | 1015 | if (BufferSize % Private->BlockSize != 0) {\r |
493d8e3a | 1016 | return ProbeMediaStatusEx (Private->DiskIo2, MediaId, EFI_BAD_BUFFER_SIZE);\r |
490b5ea1 | 1017 | }\r |
1018 | \r | |
1019 | Offset = MultU64x32 (Lba, Private->BlockSize) + Private->Start;\r | |
1020 | if (Offset + BufferSize > Private->End) {\r | |
493d8e3a | 1021 | return ProbeMediaStatusEx (Private->DiskIo2, MediaId, EFI_INVALID_PARAMETER);\r |
490b5ea1 | 1022 | }\r |
d1102dba | 1023 | \r |
493d8e3a RN |
1024 | if ((Token != NULL) && (Token->Event != NULL)) {\r |
1025 | Task = PartitionCreateAccessTask (Token);\r | |
1026 | if (Task == NULL) {\r | |
1027 | return EFI_OUT_OF_RESOURCES;\r | |
1028 | }\r | |
490b5ea1 | 1029 | \r |
493d8e3a RN |
1030 | Status = Private->DiskIo2->WriteDiskEx (Private->DiskIo2, MediaId, Offset, &Task->DiskIo2Token, BufferSize, Buffer);\r |
1031 | if (EFI_ERROR (Status)) {\r | |
1032 | gBS->CloseEvent (Task->DiskIo2Token.Event);\r | |
1033 | FreePool (Task);\r | |
1034 | }\r | |
1035 | } else {\r | |
1036 | Status = Private->DiskIo2->WriteDiskEx (Private->DiskIo2, MediaId, Offset, NULL, BufferSize, Buffer);\r | |
490b5ea1 | 1037 | }\r |
493d8e3a | 1038 | return Status;\r |
490b5ea1 | 1039 | }\r |
1040 | \r | |
1041 | /**\r | |
1042 | Flush the Block Device.\r | |
d1102dba | 1043 | \r |
490b5ea1 | 1044 | If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED\r |
1045 | is returned and non-blocking I/O is being used, the Event associated with\r | |
d1102dba | 1046 | this request will not be signaled.\r |
490b5ea1 | 1047 | \r |
1048 | @param[in] This Indicates a pointer to the calling context.\r | |
86d8e199 | 1049 | @param[in, out] Token A pointer to the token associated with the transaction\r |
490b5ea1 | 1050 | \r |
1051 | @retval EFI_SUCCESS The flush request was queued if Event is not NULL.\r | |
1052 | All outstanding data was written correctly to the\r | |
1053 | device if the Event is NULL.\r | |
1054 | @retval EFI_DEVICE_ERROR The device reported an error while writting back\r | |
1055 | the data.\r | |
1056 | @retval EFI_WRITE_PROTECTED The device cannot be written to.\r | |
1057 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
1058 | @retval EFI_MEDIA_CHANGED The MediaId is not for the current media.\r | |
1059 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack\r | |
1060 | of resources.\r | |
1061 | \r | |
1062 | **/\r | |
1063 | EFI_STATUS\r | |
1064 | EFIAPI\r | |
1065 | PartitionFlushBlocksEx (\r | |
1066 | IN EFI_BLOCK_IO2_PROTOCOL *This,\r | |
1067 | IN OUT EFI_BLOCK_IO2_TOKEN *Token\r | |
1068 | )\r | |
1069 | {\r | |
493d8e3a | 1070 | EFI_STATUS Status;\r |
490b5ea1 | 1071 | PARTITION_PRIVATE_DATA *Private;\r |
493d8e3a | 1072 | PARTITION_ACCESS_TASK *Task;\r |
490b5ea1 | 1073 | \r |
1074 | Private = PARTITION_DEVICE_FROM_BLOCK_IO2_THIS (This);\r | |
1075 | \r | |
493d8e3a RN |
1076 | if ((Token != NULL) && (Token->Event != NULL)) {\r |
1077 | Task = PartitionCreateAccessTask (Token);\r | |
1078 | if (Task == NULL) {\r | |
1079 | return EFI_OUT_OF_RESOURCES;\r | |
1080 | }\r | |
490b5ea1 | 1081 | \r |
493d8e3a RN |
1082 | Status = Private->DiskIo2->FlushDiskEx (Private->DiskIo2, &Task->DiskIo2Token);\r |
1083 | if (EFI_ERROR (Status)) {\r | |
1084 | gBS->CloseEvent (Task->DiskIo2Token.Event);\r | |
1085 | FreePool (Task);\r | |
1086 | }\r | |
1087 | } else {\r | |
1088 | Status = Private->DiskIo2->FlushDiskEx (Private->DiskIo2, NULL);\r | |
1089 | }\r | |
1090 | return Status;\r | |
490b5ea1 | 1091 | }\r |
adbcbf8f | 1092 | \r |
1093 | \r | |
1094 | /**\r | |
1095 | Create a child handle for a logical block device that represents the\r | |
1096 | bytes Start to End of the Parent Block IO device.\r | |
1097 | \r | |
490b5ea1 | 1098 | @param[in] This Protocol instance pointer.\r |
1099 | @param[in] ParentHandle Parent Handle for new child.\r | |
1100 | @param[in] ParentDiskIo Parent DiskIo interface.\r | |
493d8e3a | 1101 | @param[in] ParentDiskIo2 Parent DiskIo2 interface.\r |
490b5ea1 | 1102 | @param[in] ParentBlockIo Parent BlockIo interface.\r |
1103 | @param[in] ParentBlockIo2 Parent BlockIo2 interface.\r | |
1104 | @param[in] ParentDevicePath Parent Device Path.\r | |
1105 | @param[in] DevicePathNode Child Device Path node.\r | |
3a3d62d2 | 1106 | @param[in] PartitionInfo Child Partition Information interface.\r |
490b5ea1 | 1107 | @param[in] Start Start Block.\r |
1108 | @param[in] End End Block.\r | |
1109 | @param[in] BlockSize Child block size.\r | |
709c9fd5 | 1110 | @param[in] TypeGuid Partition GUID Type.\r |
490b5ea1 | 1111 | \r |
1112 | @retval EFI_SUCCESS A child handle was added.\r | |
1113 | @retval other A child handle was not added.\r | |
adbcbf8f | 1114 | \r |
1115 | **/\r | |
1116 | EFI_STATUS\r | |
1117 | PartitionInstallChildHandle (\r | |
1118 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
1119 | IN EFI_HANDLE ParentHandle,\r | |
1120 | IN EFI_DISK_IO_PROTOCOL *ParentDiskIo,\r | |
493d8e3a | 1121 | IN EFI_DISK_IO2_PROTOCOL *ParentDiskIo2,\r |
adbcbf8f | 1122 | IN EFI_BLOCK_IO_PROTOCOL *ParentBlockIo,\r |
490b5ea1 | 1123 | IN EFI_BLOCK_IO2_PROTOCOL *ParentBlockIo2,\r |
adbcbf8f | 1124 | IN EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath,\r |
1125 | IN EFI_DEVICE_PATH_PROTOCOL *DevicePathNode,\r | |
3a3d62d2 | 1126 | IN EFI_PARTITION_INFO_PROTOCOL *PartitionInfo,\r |
adbcbf8f | 1127 | IN EFI_LBA Start,\r |
1128 | IN EFI_LBA End,\r | |
709c9fd5 JB |
1129 | IN UINT32 BlockSize,\r |
1130 | IN EFI_GUID *TypeGuid\r | |
adbcbf8f | 1131 | )\r |
1132 | {\r | |
1133 | EFI_STATUS Status;\r | |
1134 | PARTITION_PRIVATE_DATA *Private;\r | |
1135 | \r | |
490b5ea1 | 1136 | Status = EFI_SUCCESS;\r |
adbcbf8f | 1137 | Private = AllocateZeroPool (sizeof (PARTITION_PRIVATE_DATA));\r |
1138 | if (Private == NULL) {\r | |
1139 | return EFI_OUT_OF_RESOURCES;\r | |
1140 | }\r | |
1141 | \r | |
1142 | Private->Signature = PARTITION_PRIVATE_DATA_SIGNATURE;\r | |
1143 | \r | |
1144 | Private->Start = MultU64x32 (Start, ParentBlockIo->Media->BlockSize);\r | |
1145 | Private->End = MultU64x32 (End + 1, ParentBlockIo->Media->BlockSize);\r | |
1146 | \r | |
1147 | Private->BlockSize = BlockSize;\r | |
1148 | Private->ParentBlockIo = ParentBlockIo;\r | |
490b5ea1 | 1149 | Private->ParentBlockIo2 = ParentBlockIo2;\r |
adbcbf8f | 1150 | Private->DiskIo = ParentDiskIo;\r |
493d8e3a | 1151 | Private->DiskIo2 = ParentDiskIo2;\r |
adbcbf8f | 1152 | \r |
d0844d13 | 1153 | //\r |
1154 | // Set the BlockIO into Private Data.\r | |
1155 | //\r | |
1156 | Private->BlockIo.Revision = ParentBlockIo->Revision;\r | |
d1102dba | 1157 | \r |
d0844d13 | 1158 | Private->BlockIo.Media = &Private->Media;\r |
1159 | CopyMem (Private->BlockIo.Media, ParentBlockIo->Media, sizeof (EFI_BLOCK_IO_MEDIA));\r | |
490b5ea1 | 1160 | \r |
d0844d13 | 1161 | Private->BlockIo.Reset = PartitionReset;\r |
1162 | Private->BlockIo.ReadBlocks = PartitionReadBlocks;\r | |
1163 | Private->BlockIo.WriteBlocks = PartitionWriteBlocks;\r | |
1164 | Private->BlockIo.FlushBlocks = PartitionFlushBlocks;\r | |
490b5ea1 | 1165 | \r |
d0844d13 | 1166 | //\r |
1167 | // Set the BlockIO2 into Private Data.\r | |
1168 | //\r | |
493d8e3a RN |
1169 | if (Private->DiskIo2 != NULL) {\r |
1170 | ASSERT (Private->ParentBlockIo2 != NULL);\r | |
490b5ea1 | 1171 | Private->BlockIo2.Media = &Private->Media2;\r |
1172 | CopyMem (Private->BlockIo2.Media, ParentBlockIo2->Media, sizeof (EFI_BLOCK_IO_MEDIA));\r | |
1173 | \r | |
1174 | Private->BlockIo2.Reset = PartitionResetEx;\r | |
1175 | Private->BlockIo2.ReadBlocksEx = PartitionReadBlocksEx;\r | |
1176 | Private->BlockIo2.WriteBlocksEx = PartitionWriteBlocksEx;\r | |
d1102dba | 1177 | Private->BlockIo2.FlushBlocksEx = PartitionFlushBlocksEx;\r |
490b5ea1 | 1178 | }\r |
67f802ed | 1179 | \r |
67f802ed | 1180 | Private->Media.IoAlign = 0;\r |
490b5ea1 | 1181 | Private->Media.LogicalPartition = TRUE;\r |
adbcbf8f | 1182 | Private->Media.LastBlock = DivU64x32 (\r |
1183 | MultU64x32 (\r | |
1184 | End - Start + 1,\r | |
d0844d13 | 1185 | ParentBlockIo->Media->BlockSize\r |
adbcbf8f | 1186 | ),\r |
490b5ea1 | 1187 | BlockSize\r |
adbcbf8f | 1188 | ) - 1;\r |
1189 | \r | |
67f802ed | 1190 | Private->Media.BlockSize = (UINT32) BlockSize;\r |
adbcbf8f | 1191 | \r |
493d8e3a | 1192 | Private->Media2.IoAlign = 0;\r |
490b5ea1 | 1193 | Private->Media2.LogicalPartition = TRUE;\r |
1194 | Private->Media2.LastBlock = Private->Media.LastBlock;\r | |
1195 | Private->Media2.BlockSize = (UINT32) BlockSize;\r | |
1196 | \r | |
fe3b68bb | 1197 | //\r |
0e87144e | 1198 | // Per UEFI Spec, LowestAlignedLba, LogicalBlocksPerPhysicalBlock and OptimalTransferLengthGranularity must be 0\r |
fe3b68bb RN |
1199 | // for logical partitions.\r |
1200 | //\r | |
1201 | if (Private->BlockIo.Revision >= EFI_BLOCK_IO_PROTOCOL_REVISION2) {\r | |
c582ad45 EB |
1202 | Private->Media.LowestAlignedLba = 0;\r |
1203 | Private->Media.LogicalBlocksPerPhysicalBlock = 0;\r | |
1204 | Private->Media2.LowestAlignedLba = 0;\r | |
1205 | Private->Media2.LogicalBlocksPerPhysicalBlock = 0;\r | |
0e87144e | 1206 | if (Private->BlockIo.Revision >= EFI_BLOCK_IO_PROTOCOL_REVISION3) {\r |
c582ad45 EB |
1207 | Private->Media.OptimalTransferLengthGranularity = 0;\r |
1208 | Private->Media2.OptimalTransferLengthGranularity = 0;\r | |
0e87144e | 1209 | }\r |
fe3b68bb RN |
1210 | }\r |
1211 | \r | |
490b5ea1 | 1212 | Private->DevicePath = AppendDevicePathNode (ParentDevicePath, DevicePathNode);\r |
adbcbf8f | 1213 | \r |
1214 | if (Private->DevicePath == NULL) {\r | |
1215 | FreePool (Private);\r | |
1216 | return EFI_OUT_OF_RESOURCES;\r | |
1217 | }\r | |
1218 | \r | |
3a3d62d2 HW |
1219 | //\r |
1220 | // Set the PartitionInfo into Private Data.\r | |
1221 | //\r | |
1222 | CopyMem (&Private->PartitionInfo, PartitionInfo, sizeof (EFI_PARTITION_INFO_PROTOCOL));\r | |
1223 | \r | |
709c9fd5 JB |
1224 | if (TypeGuid != NULL) {\r |
1225 | CopyGuid(&(Private->TypeGuid), TypeGuid);\r | |
adbcbf8f | 1226 | } else {\r |
709c9fd5 | 1227 | ZeroMem ((VOID *)&(Private->TypeGuid), sizeof (EFI_GUID));\r |
adbcbf8f | 1228 | }\r |
490b5ea1 | 1229 | \r |
adbcbf8f | 1230 | //\r |
d1102dba | 1231 | // Create the new handle.\r |
adbcbf8f | 1232 | //\r |
1233 | Private->Handle = NULL;\r | |
493d8e3a | 1234 | if (Private->DiskIo2 != NULL) {\r |
490b5ea1 | 1235 | Status = gBS->InstallMultipleProtocolInterfaces (\r |
1236 | &Private->Handle,\r | |
1237 | &gEfiDevicePathProtocolGuid,\r | |
1238 | Private->DevicePath,\r | |
1239 | &gEfiBlockIoProtocolGuid,\r | |
1240 | &Private->BlockIo,\r | |
1241 | &gEfiBlockIo2ProtocolGuid,\r | |
1242 | &Private->BlockIo2,\r | |
3a3d62d2 HW |
1243 | &gEfiPartitionInfoProtocolGuid,\r |
1244 | &Private->PartitionInfo,\r | |
709c9fd5 | 1245 | TypeGuid,\r |
490b5ea1 | 1246 | NULL,\r |
1247 | NULL\r | |
1248 | );\r | |
d1102dba | 1249 | } else {\r |
d0844d13 | 1250 | Status = gBS->InstallMultipleProtocolInterfaces (\r |
1251 | &Private->Handle,\r | |
1252 | &gEfiDevicePathProtocolGuid,\r | |
1253 | Private->DevicePath,\r | |
1254 | &gEfiBlockIoProtocolGuid,\r | |
1255 | &Private->BlockIo,\r | |
3a3d62d2 HW |
1256 | &gEfiPartitionInfoProtocolGuid,\r |
1257 | &Private->PartitionInfo,\r | |
709c9fd5 | 1258 | TypeGuid,\r |
d0844d13 | 1259 | NULL,\r |
1260 | NULL\r | |
1261 | );\r | |
490b5ea1 | 1262 | }\r |
adbcbf8f | 1263 | \r |
1264 | if (!EFI_ERROR (Status)) {\r | |
1265 | //\r | |
1266 | // Open the Parent Handle for the child\r | |
1267 | //\r | |
1268 | Status = gBS->OpenProtocol (\r | |
1269 | ParentHandle,\r | |
1270 | &gEfiDiskIoProtocolGuid,\r | |
1271 | (VOID **) &ParentDiskIo,\r | |
1272 | This->DriverBindingHandle,\r | |
1273 | Private->Handle,\r | |
1274 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r | |
1275 | );\r | |
1276 | } else {\r | |
1277 | FreePool (Private->DevicePath);\r | |
1278 | FreePool (Private);\r | |
c7195b9e ZG |
1279 | \r |
1280 | //\r | |
1281 | // if the Status == EFI_ALREADY_STARTED, it means the child handles\r | |
1282 | // are already installed. So return EFI_SUCCESS to avoid do the next\r | |
1283 | // partition type check.\r | |
1284 | //\r | |
1285 | if (Status == EFI_ALREADY_STARTED) {\r | |
1286 | Status = EFI_SUCCESS;\r | |
1287 | }\r | |
adbcbf8f | 1288 | }\r |
1289 | \r | |
1290 | return Status;\r | |
1291 | }\r | |
1292 | \r | |
1293 | \r | |
1294 | /**\r | |
1295 | The user Entry Point for module Partition. The user code starts with this function.\r | |
1296 | \r | |
d1102dba | 1297 | @param[in] ImageHandle The firmware allocated handle for the EFI image.\r |
adbcbf8f | 1298 | @param[in] SystemTable A pointer to the EFI System Table.\r |
d1102dba | 1299 | \r |
adbcbf8f | 1300 | @retval EFI_SUCCESS The entry point is executed successfully.\r |
1301 | @retval other Some error occurs when executing this entry point.\r | |
1302 | \r | |
1303 | **/\r | |
1304 | EFI_STATUS\r | |
1305 | EFIAPI\r | |
1306 | InitializePartition (\r | |
1307 | IN EFI_HANDLE ImageHandle,\r | |
1308 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
1309 | )\r | |
1310 | {\r | |
1311 | EFI_STATUS Status;\r | |
1312 | \r | |
1313 | //\r | |
1314 | // Install driver model protocol(s).\r | |
1315 | //\r | |
d38a0f44 | 1316 | Status = EfiLibInstallDriverBindingComponentName2 (\r |
adbcbf8f | 1317 | ImageHandle,\r |
1318 | SystemTable,\r | |
1319 | &gPartitionDriverBinding,\r | |
1320 | ImageHandle,\r | |
1321 | &gPartitionComponentName,\r | |
d38a0f44 | 1322 | &gPartitionComponentName2\r |
adbcbf8f | 1323 | );\r |
1324 | ASSERT_EFI_ERROR (Status);\r | |
1325 | \r | |
1326 | \r | |
1327 | return Status;\r | |
1328 | }\r | |
1329 | \r | |
e3325721 HW |
1330 | \r |
1331 | /**\r | |
1332 | Test to see if there is any child on ControllerHandle.\r | |
1333 | \r | |
1334 | @param[in] ControllerHandle Handle of device to test.\r | |
1335 | \r | |
1336 | @retval TRUE There are children on the ControllerHandle.\r | |
1337 | @retval FALSE No child is on the ControllerHandle.\r | |
1338 | \r | |
1339 | **/\r | |
1340 | BOOLEAN\r | |
1341 | HasChildren (\r | |
1342 | IN EFI_HANDLE ControllerHandle\r | |
1343 | )\r | |
1344 | {\r | |
1345 | EFI_OPEN_PROTOCOL_INFORMATION_ENTRY *OpenInfoBuffer;\r | |
1346 | UINTN EntryCount;\r | |
1347 | EFI_STATUS Status;\r | |
1348 | UINTN Index;\r | |
1349 | \r | |
1350 | Status = gBS->OpenProtocolInformation (\r | |
1351 | ControllerHandle,\r | |
1352 | &gEfiDiskIoProtocolGuid,\r | |
1353 | &OpenInfoBuffer,\r | |
1354 | &EntryCount\r | |
1355 | );\r | |
1356 | ASSERT_EFI_ERROR (Status);\r | |
1357 | \r | |
1358 | for (Index = 0; Index < EntryCount; Index++) {\r | |
1359 | if ((OpenInfoBuffer[Index].Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) != 0) {\r | |
1360 | break;\r | |
1361 | }\r | |
1362 | }\r | |
1363 | FreePool (OpenInfoBuffer);\r | |
1364 | \r | |
1365 | return (BOOLEAN) (Index < EntryCount);\r | |
1366 | }\r | |
1367 | \r |