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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 |
e5eed7d3 | 9 | This program and the accompanying materials\r |
f42be642 | 10 | are licensed and made available under the terms and conditions of the BSD License\r |
11 | which accompanies this distribution. The full text of the license may be found at\r | |
12 | http://opensource.org/licenses/bsd-license.php\r | |
adbcbf8f | 13 | \r |
f42be642 | 14 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r |
15 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
adbcbf8f | 16 | \r |
17 | **/\r | |
18 | \r | |
19 | \r | |
20 | #include "Partition.h"\r | |
21 | \r | |
22 | //\r | |
ff61847d | 23 | // Partition Driver Global Variables.\r |
adbcbf8f | 24 | //\r |
25 | EFI_DRIVER_BINDING_PROTOCOL gPartitionDriverBinding = {\r | |
26 | PartitionDriverBindingSupported,\r | |
27 | PartitionDriverBindingStart,\r | |
28 | PartitionDriverBindingStop,\r | |
c86b273d | 29 | //\r |
d1102dba LG |
30 | // Grub4Dos copies the BPB of the first partition to the MBR. If the\r |
31 | // DriverBindingStart() of the Fat driver gets run before that of Partition\r | |
c86b273d RN |
32 | // driver only the first partition can be recognized.\r |
33 | // Let the driver binding version of Partition driver be higher than that of\r | |
34 | // Fat driver to make sure the DriverBindingStart() of the Partition driver\r | |
35 | // gets run before that of Fat driver so that all the partitions can be recognized.\r | |
36 | //\r | |
37 | 0xb,\r | |
adbcbf8f | 38 | NULL,\r |
39 | NULL\r | |
40 | };\r | |
41 | \r | |
ff61847d | 42 | //\r |
d1102dba | 43 | // Prioritized function list to detect partition table.\r |
ff61847d | 44 | //\r |
adbcbf8f | 45 | PARTITION_DETECT_ROUTINE mPartitionDetectRoutineTable[] = {\r |
46 | PartitionInstallGptChildHandles,\r | |
adbcbf8f | 47 | PartitionInstallMbrChildHandles,\r |
8aafec2c | 48 | PartitionInstallUdfChildHandles,\r |
adbcbf8f | 49 | NULL\r |
50 | };\r | |
51 | \r | |
adbcbf8f | 52 | /**\r |
53 | Test to see if this driver supports ControllerHandle. Any ControllerHandle\r | |
490b5ea1 | 54 | than contains a BlockIo and DiskIo protocol or a BlockIo2 protocol can be\r |
55 | supported.\r | |
adbcbf8f | 56 | \r |
490b5ea1 | 57 | @param[in] This Protocol instance pointer.\r |
58 | @param[in] ControllerHandle Handle of device to test.\r | |
59 | @param[in] RemainingDevicePath Optional parameter use to pick a specific child\r | |
60 | device to start.\r | |
adbcbf8f | 61 | \r |
62 | @retval EFI_SUCCESS This driver supports this device\r | |
63 | @retval EFI_ALREADY_STARTED This driver is already running on this device\r | |
64 | @retval other This driver does not support this device\r | |
65 | \r | |
66 | **/\r | |
67 | EFI_STATUS\r | |
68 | EFIAPI\r | |
69 | PartitionDriverBindingSupported (\r | |
70 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
71 | IN EFI_HANDLE ControllerHandle,\r | |
72 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
73 | )\r | |
74 | {\r | |
75 | EFI_STATUS Status;\r | |
76 | EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;\r | |
77 | EFI_DISK_IO_PROTOCOL *DiskIo;\r | |
78 | EFI_DEV_PATH *Node;\r | |
79 | \r | |
9be29006 | 80 | //\r |
81 | // Check RemainingDevicePath validation\r | |
82 | //\r | |
adbcbf8f | 83 | if (RemainingDevicePath != NULL) {\r |
9be29006 | 84 | //\r |
d1102dba | 85 | // Check if RemainingDevicePath is the End of Device Path Node,\r |
9be29006 | 86 | // if yes, go on checking other conditions\r |
87 | //\r | |
88 | if (!IsDevicePathEnd (RemainingDevicePath)) {\r | |
89 | //\r | |
90 | // If RemainingDevicePath isn't the End of Device Path Node,\r | |
91 | // check its validation\r | |
92 | //\r | |
93 | Node = (EFI_DEV_PATH *) RemainingDevicePath;\r | |
94 | if (Node->DevPath.Type != MEDIA_DEVICE_PATH ||\r | |
adbcbf8f | 95 | Node->DevPath.SubType != MEDIA_HARDDRIVE_DP ||\r |
9be29006 | 96 | DevicePathNodeLength (&Node->DevPath) != sizeof (HARDDRIVE_DEVICE_PATH)) {\r |
490b5ea1 | 97 | return EFI_UNSUPPORTED;\r |
9be29006 | 98 | }\r |
adbcbf8f | 99 | }\r |
100 | }\r | |
9be29006 | 101 | \r |
adbcbf8f | 102 | //\r |
103 | // Open the IO Abstraction(s) needed to perform the supported test\r | |
104 | //\r | |
105 | Status = gBS->OpenProtocol (\r | |
106 | ControllerHandle,\r | |
9be29006 | 107 | &gEfiDiskIoProtocolGuid,\r |
108 | (VOID **) &DiskIo,\r | |
adbcbf8f | 109 | This->DriverBindingHandle,\r |
110 | ControllerHandle,\r | |
111 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
112 | );\r | |
113 | if (Status == EFI_ALREADY_STARTED) {\r | |
114 | return EFI_SUCCESS;\r | |
115 | }\r | |
adbcbf8f | 116 | if (EFI_ERROR (Status)) {\r |
117 | return Status;\r | |
118 | }\r | |
119 | //\r | |
120 | // Close the I/O Abstraction(s) used to perform the supported test\r | |
121 | //\r | |
122 | gBS->CloseProtocol (\r | |
ff61847d | 123 | ControllerHandle,\r |
9be29006 | 124 | &gEfiDiskIoProtocolGuid,\r |
ff61847d | 125 | This->DriverBindingHandle,\r |
126 | ControllerHandle\r | |
127 | );\r | |
adbcbf8f | 128 | \r |
129 | //\r | |
9be29006 | 130 | // Open the EFI Device Path protocol needed to perform the supported test\r |
adbcbf8f | 131 | //\r |
132 | Status = gBS->OpenProtocol (\r | |
133 | ControllerHandle,\r | |
9be29006 | 134 | &gEfiDevicePathProtocolGuid,\r |
135 | (VOID **) &ParentDevicePath,\r | |
adbcbf8f | 136 | This->DriverBindingHandle,\r |
137 | ControllerHandle,\r | |
138 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
139 | );\r | |
140 | if (Status == EFI_ALREADY_STARTED) {\r | |
141 | return EFI_SUCCESS;\r | |
142 | }\r | |
143 | \r | |
144 | if (EFI_ERROR (Status)) {\r | |
145 | return Status;\r | |
146 | }\r | |
9be29006 | 147 | \r |
adbcbf8f | 148 | //\r |
9be29006 | 149 | // Close protocol, don't use device path protocol in the Support() function\r |
adbcbf8f | 150 | //\r |
151 | gBS->CloseProtocol (\r | |
152 | ControllerHandle,\r | |
9be29006 | 153 | &gEfiDevicePathProtocolGuid,\r |
adbcbf8f | 154 | This->DriverBindingHandle,\r |
155 | ControllerHandle\r | |
156 | );\r | |
157 | \r | |
158 | //\r | |
159 | // Open the IO Abstraction(s) needed to perform the supported test\r | |
160 | //\r | |
161 | Status = gBS->OpenProtocol (\r | |
162 | ControllerHandle,\r | |
163 | &gEfiBlockIoProtocolGuid,\r | |
164 | NULL,\r | |
165 | This->DriverBindingHandle,\r | |
166 | ControllerHandle,\r | |
167 | EFI_OPEN_PROTOCOL_TEST_PROTOCOL\r | |
168 | );\r | |
21e1018b | 169 | \r |
69c0fbd2 | 170 | return Status;\r |
adbcbf8f | 171 | }\r |
172 | \r | |
adbcbf8f | 173 | /**\r |
490b5ea1 | 174 | Start this driver on ControllerHandle by opening a Block IO or a Block IO2\r |
175 | or both, and Disk IO protocol, reading Device Path, and creating a child\r | |
176 | handle with a Disk IO and device path protocol.\r | |
adbcbf8f | 177 | \r |
490b5ea1 | 178 | @param[in] This Protocol instance pointer.\r |
179 | @param[in] ControllerHandle Handle of device to bind driver to\r | |
180 | @param[in] RemainingDevicePath Optional parameter use to pick a specific child\r | |
181 | device to start.\r | |
adbcbf8f | 182 | \r |
183 | @retval EFI_SUCCESS This driver is added to ControllerHandle\r | |
184 | @retval EFI_ALREADY_STARTED This driver is already running on ControllerHandle\r | |
185 | @retval other This driver does not support this device\r | |
186 | \r | |
187 | **/\r | |
188 | EFI_STATUS\r | |
189 | EFIAPI\r | |
190 | PartitionDriverBindingStart (\r | |
191 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
192 | IN EFI_HANDLE ControllerHandle,\r | |
193 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
194 | )\r | |
195 | {\r | |
196 | EFI_STATUS Status;\r | |
197 | EFI_STATUS OpenStatus;\r | |
198 | EFI_BLOCK_IO_PROTOCOL *BlockIo;\r | |
490b5ea1 | 199 | EFI_BLOCK_IO2_PROTOCOL *BlockIo2;\r |
adbcbf8f | 200 | EFI_DISK_IO_PROTOCOL *DiskIo;\r |
493d8e3a | 201 | EFI_DISK_IO2_PROTOCOL *DiskIo2;\r |
adbcbf8f | 202 | EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;\r |
203 | PARTITION_DETECT_ROUTINE *Routine;\r | |
9afd0514 | 204 | BOOLEAN MediaPresent;\r |
15cc67e6 | 205 | EFI_TPL OldTpl;\r |
adbcbf8f | 206 | \r |
21e1018b | 207 | BlockIo2 = NULL;\r |
d1102dba | 208 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r |
9be29006 | 209 | //\r |
210 | // Check RemainingDevicePath validation\r | |
211 | //\r | |
212 | if (RemainingDevicePath != NULL) {\r | |
213 | //\r | |
d1102dba | 214 | // Check if RemainingDevicePath is the End of Device Path Node,\r |
9be29006 | 215 | // if yes, return EFI_SUCCESS\r |
216 | //\r | |
217 | if (IsDevicePathEnd (RemainingDevicePath)) {\r | |
15cc67e6 | 218 | Status = EFI_SUCCESS;\r |
219 | goto Exit;\r | |
9be29006 | 220 | }\r |
221 | }\r | |
222 | \r | |
490b5ea1 | 223 | //\r |
224 | // Try to open BlockIO and BlockIO2. If BlockIO would be opened, continue,\r | |
225 | // otherwise, return error.\r | |
226 | //\r | |
adbcbf8f | 227 | Status = gBS->OpenProtocol (\r |
228 | ControllerHandle,\r | |
229 | &gEfiBlockIoProtocolGuid,\r | |
230 | (VOID **) &BlockIo,\r | |
231 | This->DriverBindingHandle,\r | |
232 | ControllerHandle,\r | |
233 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
234 | );\r | |
235 | if (EFI_ERROR (Status)) {\r | |
15cc67e6 | 236 | goto Exit;\r |
adbcbf8f | 237 | }\r |
490b5ea1 | 238 | \r |
239 | Status = gBS->OpenProtocol (\r | |
240 | ControllerHandle,\r | |
241 | &gEfiBlockIo2ProtocolGuid,\r | |
242 | (VOID **) &BlockIo2,\r | |
243 | This->DriverBindingHandle,\r | |
244 | ControllerHandle,\r | |
493d8e3a | 245 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r |
490b5ea1 | 246 | );\r |
493d8e3a RN |
247 | if (EFI_ERROR (Status)) {\r |
248 | BlockIo2 = NULL;\r | |
249 | }\r | |
490b5ea1 | 250 | \r |
adbcbf8f | 251 | //\r |
490b5ea1 | 252 | // Get the Device Path Protocol on ControllerHandle's handle.\r |
adbcbf8f | 253 | //\r |
254 | Status = gBS->OpenProtocol (\r | |
255 | ControllerHandle,\r | |
256 | &gEfiDevicePathProtocolGuid,\r | |
257 | (VOID **) &ParentDevicePath,\r | |
258 | This->DriverBindingHandle,\r | |
259 | ControllerHandle,\r | |
260 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
261 | );\r | |
262 | if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {\r | |
15cc67e6 | 263 | goto Exit;\r |
adbcbf8f | 264 | }\r |
265 | \r | |
493d8e3a RN |
266 | //\r |
267 | // Get the DiskIo and DiskIo2.\r | |
268 | //\r | |
adbcbf8f | 269 | Status = gBS->OpenProtocol (\r |
270 | ControllerHandle,\r | |
271 | &gEfiDiskIoProtocolGuid,\r | |
272 | (VOID **) &DiskIo,\r | |
273 | This->DriverBindingHandle,\r | |
274 | ControllerHandle,\r | |
275 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
276 | );\r | |
277 | if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {\r | |
278 | gBS->CloseProtocol (\r | |
279 | ControllerHandle,\r | |
280 | &gEfiDevicePathProtocolGuid,\r | |
281 | This->DriverBindingHandle,\r | |
282 | ControllerHandle\r | |
283 | );\r | |
15cc67e6 | 284 | goto Exit;\r |
adbcbf8f | 285 | }\r |
286 | \r | |
287 | OpenStatus = Status;\r | |
288 | \r | |
493d8e3a RN |
289 | Status = gBS->OpenProtocol (\r |
290 | ControllerHandle,\r | |
291 | &gEfiDiskIo2ProtocolGuid,\r | |
292 | (VOID **) &DiskIo2,\r | |
293 | This->DriverBindingHandle,\r | |
294 | ControllerHandle,\r | |
295 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
296 | );\r | |
297 | if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {\r | |
298 | DiskIo2 = NULL;\r | |
299 | }\r | |
300 | \r | |
adbcbf8f | 301 | //\r |
9afd0514 | 302 | // Try to read blocks when there's media or it is removable physical partition.\r |
adbcbf8f | 303 | //\r |
9afd0514 | 304 | Status = EFI_UNSUPPORTED;\r |
305 | MediaPresent = BlockIo->Media->MediaPresent;\r | |
306 | if (BlockIo->Media->MediaPresent ||\r | |
307 | (BlockIo->Media->RemovableMedia && !BlockIo->Media->LogicalPartition)) {\r | |
adbcbf8f | 308 | //\r |
01a68fd3 HW |
309 | // Try for GPT, then legacy MBR partition types, and then UDF and El Torito.\r |
310 | // If the media supports a given partition type install child handles to\r | |
311 | // represent the partitions described by the media.\r | |
adbcbf8f | 312 | //\r |
313 | Routine = &mPartitionDetectRoutineTable[0];\r | |
314 | while (*Routine != NULL) {\r | |
315 | Status = (*Routine) (\r | |
316 | This,\r | |
317 | ControllerHandle,\r | |
318 | DiskIo,\r | |
493d8e3a | 319 | DiskIo2,\r |
adbcbf8f | 320 | BlockIo,\r |
490b5ea1 | 321 | BlockIo2,\r |
adbcbf8f | 322 | ParentDevicePath\r |
323 | );\r | |
9afd0514 | 324 | if (!EFI_ERROR (Status) || Status == EFI_MEDIA_CHANGED || Status == EFI_NO_MEDIA) {\r |
adbcbf8f | 325 | break;\r |
326 | }\r | |
327 | Routine++;\r | |
328 | }\r | |
329 | }\r | |
330 | //\r | |
331 | // In the case that the driver is already started (OpenStatus == EFI_ALREADY_STARTED),\r | |
332 | // the DevicePathProtocol and the DiskIoProtocol are not actually opened by the\r | |
333 | // driver. So don't try to close them. Otherwise, we will break the dependency\r | |
334 | // between the controller and the driver set up before.\r | |
335 | //\r | |
d1102dba | 336 | // In the case that when the media changes on a device it will Reinstall the\r |
9afd0514 | 337 | // BlockIo interaface. This will cause a call to our Stop(), and a subsequent\r |
338 | // reentrant call to our Start() successfully. We should leave the device open\r | |
339 | // when this happen. The "media change" case includes either the status is\r | |
d1102dba LG |
340 | // EFI_MEDIA_CHANGED or it is a "media" to "no media" change.\r |
341 | //\r | |
9afd0514 | 342 | if (EFI_ERROR (Status) &&\r |
343 | !EFI_ERROR (OpenStatus) &&\r | |
344 | Status != EFI_MEDIA_CHANGED &&\r | |
345 | !(MediaPresent && Status == EFI_NO_MEDIA)) {\r | |
adbcbf8f | 346 | gBS->CloseProtocol (\r |
347 | ControllerHandle,\r | |
348 | &gEfiDiskIoProtocolGuid,\r | |
349 | This->DriverBindingHandle,\r | |
350 | ControllerHandle\r | |
351 | );\r | |
490b5ea1 | 352 | //\r |
80c83a69 | 353 | // Close Parent DiskIo2 if has.\r |
d1102dba | 354 | //\r |
490b5ea1 | 355 | gBS->CloseProtocol (\r |
356 | ControllerHandle,\r | |
80c83a69 | 357 | &gEfiDiskIo2ProtocolGuid,\r |
490b5ea1 | 358 | This->DriverBindingHandle,\r |
359 | ControllerHandle\r | |
360 | );\r | |
adbcbf8f | 361 | \r |
362 | gBS->CloseProtocol (\r | |
363 | ControllerHandle,\r | |
364 | &gEfiDevicePathProtocolGuid,\r | |
365 | This->DriverBindingHandle,\r | |
366 | ControllerHandle\r | |
367 | );\r | |
368 | }\r | |
369 | \r | |
15cc67e6 | 370 | Exit:\r |
371 | gBS->RestoreTPL (OldTpl);\r | |
adbcbf8f | 372 | return Status;\r |
373 | }\r | |
374 | \r | |
adbcbf8f | 375 | /**\r |
48557c65 | 376 | Stop this driver on ControllerHandle. Support stopping any child handles\r |
adbcbf8f | 377 | created by this driver.\r |
378 | \r | |
379 | @param This Protocol instance pointer.\r | |
380 | @param ControllerHandle Handle of device to stop driver on\r | |
381 | @param NumberOfChildren Number of Handles in ChildHandleBuffer. If number of\r | |
382 | children is zero stop the entire bus driver.\r | |
383 | @param ChildHandleBuffer List of Child Handles to Stop.\r | |
384 | \r | |
385 | @retval EFI_SUCCESS This driver is removed ControllerHandle\r | |
386 | @retval other This driver was not removed from this device\r | |
387 | \r | |
388 | **/\r | |
389 | EFI_STATUS\r | |
390 | EFIAPI\r | |
391 | PartitionDriverBindingStop (\r | |
392 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
393 | IN EFI_HANDLE ControllerHandle,\r | |
394 | IN UINTN NumberOfChildren,\r | |
395 | IN EFI_HANDLE *ChildHandleBuffer\r | |
396 | )\r | |
397 | {\r | |
398 | EFI_STATUS Status;\r | |
399 | UINTN Index;\r | |
400 | EFI_BLOCK_IO_PROTOCOL *BlockIo;\r | |
490b5ea1 | 401 | EFI_BLOCK_IO2_PROTOCOL *BlockIo2;\r |
adbcbf8f | 402 | BOOLEAN AllChildrenStopped;\r |
403 | PARTITION_PRIVATE_DATA *Private;\r | |
404 | EFI_DISK_IO_PROTOCOL *DiskIo;\r | |
709c9fd5 | 405 | EFI_GUID *TypeGuid;\r |
adbcbf8f | 406 | \r |
490b5ea1 | 407 | BlockIo = NULL;\r |
408 | BlockIo2 = NULL;\r | |
409 | Private = NULL;\r | |
410 | \r | |
adbcbf8f | 411 | if (NumberOfChildren == 0) {\r |
e3325721 HW |
412 | //\r |
413 | // In the case of re-entry of the PartitionDriverBindingStop, the\r | |
414 | // NumberOfChildren may not reflect the actual number of children on the\r | |
415 | // bus driver. Hence, additional check is needed here.\r | |
416 | //\r | |
417 | if (HasChildren (ControllerHandle)) {\r | |
418 | DEBUG((EFI_D_ERROR, "PartitionDriverBindingStop: Still has child.\n"));\r | |
419 | return EFI_DEVICE_ERROR;\r | |
420 | }\r | |
421 | \r | |
adbcbf8f | 422 | //\r |
423 | // Close the bus driver\r | |
424 | //\r | |
425 | gBS->CloseProtocol (\r | |
426 | ControllerHandle,\r | |
427 | &gEfiDiskIoProtocolGuid,\r | |
428 | This->DriverBindingHandle,\r | |
429 | ControllerHandle\r | |
430 | );\r | |
490b5ea1 | 431 | //\r |
432 | // Close Parent BlockIO2 if has.\r | |
d1102dba | 433 | //\r |
490b5ea1 | 434 | gBS->CloseProtocol (\r |
435 | ControllerHandle,\r | |
493d8e3a | 436 | &gEfiDiskIo2ProtocolGuid,\r |
490b5ea1 | 437 | This->DriverBindingHandle,\r |
438 | ControllerHandle\r | |
439 | );\r | |
adbcbf8f | 440 | \r |
441 | gBS->CloseProtocol (\r | |
442 | ControllerHandle,\r | |
443 | &gEfiDevicePathProtocolGuid,\r | |
444 | This->DriverBindingHandle,\r | |
445 | ControllerHandle\r | |
446 | );\r | |
adbcbf8f | 447 | return EFI_SUCCESS;\r |
448 | }\r | |
449 | \r | |
450 | AllChildrenStopped = TRUE;\r | |
451 | for (Index = 0; Index < NumberOfChildren; Index++) {\r | |
490b5ea1 | 452 | gBS->OpenProtocol (\r |
453 | ChildHandleBuffer[Index],\r | |
454 | &gEfiBlockIoProtocolGuid,\r | |
455 | (VOID **) &BlockIo,\r | |
456 | This->DriverBindingHandle,\r | |
457 | ControllerHandle,\r | |
458 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
459 | );\r | |
460 | //\r | |
461 | // Try to locate BlockIo2.\r | |
462 | //\r | |
463 | gBS->OpenProtocol (\r | |
464 | ChildHandleBuffer[Index],\r | |
465 | &gEfiBlockIo2ProtocolGuid,\r | |
466 | (VOID **) &BlockIo2,\r | |
467 | This->DriverBindingHandle,\r | |
468 | ControllerHandle,\r | |
469 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
d1102dba | 470 | );\r |
490b5ea1 | 471 | \r |
d0844d13 | 472 | \r |
473 | Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (BlockIo);\r | |
e3325721 HW |
474 | if (Private->InStop) {\r |
475 | //\r | |
476 | // If the child handle is going to be stopped again during the re-entry\r | |
477 | // of DriverBindingStop, just do nothing.\r | |
478 | //\r | |
479 | break;\r | |
480 | }\r | |
481 | Private->InStop = TRUE;\r | |
adbcbf8f | 482 | \r |
e3325721 HW |
483 | BlockIo->FlushBlocks (BlockIo);\r |
484 | \r | |
485 | if (BlockIo2 != NULL) {\r | |
486 | Status = BlockIo2->FlushBlocksEx (BlockIo2, NULL);\r | |
487 | DEBUG((EFI_D_ERROR, "PartitionDriverBindingStop: FlushBlocksEx returned with %r\n", Status));\r | |
488 | } else {\r | |
489 | Status = EFI_SUCCESS;\r | |
490 | }\r | |
491 | \r | |
492 | gBS->CloseProtocol (\r | |
493 | ControllerHandle,\r | |
494 | &gEfiDiskIoProtocolGuid,\r | |
495 | This->DriverBindingHandle,\r | |
496 | ChildHandleBuffer[Index]\r | |
497 | );\r | |
709c9fd5 JB |
498 | \r |
499 | if (IsZeroGuid (&Private->TypeGuid)) {\r | |
500 | TypeGuid = NULL;\r | |
501 | } else {\r | |
502 | TypeGuid = &Private->TypeGuid;\r | |
503 | }\r | |
504 | \r | |
490b5ea1 | 505 | //\r |
506 | // All Software protocols have be freed from the handle so remove it.\r | |
507 | // Remove the BlockIo Protocol if has.\r | |
508 | // Remove the BlockIo2 Protocol if has.\r | |
509 | //\r | |
510 | if (BlockIo2 != NULL) {\r | |
e3325721 HW |
511 | //\r |
512 | // Some device drivers might re-install the BlockIO(2) protocols for a\r | |
513 | // media change condition. Therefore, if the FlushBlocksEx returned with\r | |
514 | // EFI_MEDIA_CHANGED, just let the BindingStop fail to avoid potential\r | |
515 | // reference of already stopped child handle.\r | |
516 | //\r | |
517 | if (Status != EFI_MEDIA_CHANGED) {\r | |
518 | Status = gBS->UninstallMultipleProtocolInterfaces (\r | |
519 | ChildHandleBuffer[Index],\r | |
520 | &gEfiDevicePathProtocolGuid,\r | |
521 | Private->DevicePath,\r | |
522 | &gEfiBlockIoProtocolGuid,\r | |
523 | &Private->BlockIo,\r | |
524 | &gEfiBlockIo2ProtocolGuid,\r | |
525 | &Private->BlockIo2,\r | |
3a3d62d2 HW |
526 | &gEfiPartitionInfoProtocolGuid,\r |
527 | &Private->PartitionInfo,\r | |
709c9fd5 | 528 | TypeGuid,\r |
e3325721 HW |
529 | NULL,\r |
530 | NULL\r | |
531 | );\r | |
532 | }\r | |
490b5ea1 | 533 | } else {\r |
490b5ea1 | 534 | Status = gBS->UninstallMultipleProtocolInterfaces (\r |
535 | ChildHandleBuffer[Index],\r | |
536 | &gEfiDevicePathProtocolGuid,\r | |
537 | Private->DevicePath,\r | |
538 | &gEfiBlockIoProtocolGuid,\r | |
539 | &Private->BlockIo,\r | |
3a3d62d2 HW |
540 | &gEfiPartitionInfoProtocolGuid,\r |
541 | &Private->PartitionInfo,\r | |
709c9fd5 | 542 | TypeGuid,\r |
490b5ea1 | 543 | NULL,\r |
544 | NULL\r | |
545 | );\r | |
546 | }\r | |
adbcbf8f | 547 | \r |
490b5ea1 | 548 | if (EFI_ERROR (Status)) {\r |
e3325721 | 549 | Private->InStop = FALSE;\r |
490b5ea1 | 550 | gBS->OpenProtocol (\r |
551 | ControllerHandle,\r | |
552 | &gEfiDiskIoProtocolGuid,\r | |
553 | (VOID **) &DiskIo,\r | |
554 | This->DriverBindingHandle,\r | |
555 | ChildHandleBuffer[Index],\r | |
556 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r | |
557 | );\r | |
558 | } else {\r | |
559 | FreePool (Private->DevicePath);\r | |
560 | FreePool (Private);\r | |
adbcbf8f | 561 | }\r |
562 | \r | |
563 | if (EFI_ERROR (Status)) {\r | |
564 | AllChildrenStopped = FALSE;\r | |
e3325721 HW |
565 | if (Status == EFI_MEDIA_CHANGED) {\r |
566 | break;\r | |
567 | }\r | |
adbcbf8f | 568 | }\r |
569 | }\r | |
570 | \r | |
571 | if (!AllChildrenStopped) {\r | |
572 | return EFI_DEVICE_ERROR;\r | |
573 | }\r | |
574 | \r | |
575 | return EFI_SUCCESS;\r | |
576 | }\r | |
577 | \r | |
578 | \r | |
579 | /**\r | |
580 | Reset the Block Device.\r | |
581 | \r | |
582 | @param This Protocol instance pointer.\r | |
583 | @param ExtendedVerification Driver may perform diagnostics on reset.\r | |
584 | \r | |
585 | @retval EFI_SUCCESS The device was reset.\r | |
586 | @retval EFI_DEVICE_ERROR The device is not functioning properly and could\r | |
587 | not be reset.\r | |
588 | \r | |
589 | **/\r | |
adbcbf8f | 590 | EFI_STATUS\r |
591 | EFIAPI\r | |
592 | PartitionReset (\r | |
593 | IN EFI_BLOCK_IO_PROTOCOL *This,\r | |
594 | IN BOOLEAN ExtendedVerification\r | |
595 | )\r | |
596 | {\r | |
597 | PARTITION_PRIVATE_DATA *Private;\r | |
598 | \r | |
599 | Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (This);\r | |
600 | \r | |
601 | return Private->ParentBlockIo->Reset (\r | |
602 | Private->ParentBlockIo,\r | |
603 | ExtendedVerification\r | |
604 | );\r | |
605 | }\r | |
606 | \r | |
fcf5e49d RN |
607 | /**\r |
608 | Probe the media status and return EFI_NO_MEDIA or EFI_MEDIA_CHANGED\r | |
609 | for no media or media change case. Otherwise DefaultStatus is returned.\r | |
610 | \r | |
611 | @param DiskIo Pointer to the DiskIo instance.\r | |
612 | @param MediaId Id of the media, changes every time the media is replaced.\r | |
613 | @param DefaultStatus The default status to return when it's not the no media\r | |
614 | or media change case.\r | |
615 | \r | |
616 | @retval EFI_NO_MEDIA There is no media.\r | |
617 | @retval EFI_MEDIA_CHANGED The media was changed.\r | |
618 | @retval others The default status to return.\r | |
619 | **/\r | |
620 | EFI_STATUS\r | |
621 | ProbeMediaStatus (\r | |
622 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
623 | IN UINT32 MediaId,\r | |
624 | IN EFI_STATUS DefaultStatus\r | |
625 | )\r | |
626 | {\r | |
627 | EFI_STATUS Status;\r | |
df473cc1 | 628 | UINT8 Buffer[1];\r |
fcf5e49d RN |
629 | \r |
630 | //\r | |
df473cc1 RC |
631 | // Read 1 byte from offset 0 to check if the MediaId is still valid.\r |
632 | // The reading operation is synchronious thus it is not worth it to\r | |
633 | // allocate a buffer from the pool. The destination buffer for the\r | |
634 | // data is in the stack.\r | |
fcf5e49d | 635 | //\r |
df473cc1 | 636 | Status = DiskIo->ReadDisk (DiskIo, MediaId, 0, 1, (VOID*)Buffer);\r |
fcf5e49d RN |
637 | if ((Status == EFI_NO_MEDIA) || (Status == EFI_MEDIA_CHANGED)) {\r |
638 | return Status;\r | |
639 | }\r | |
640 | return DefaultStatus;\r | |
641 | }\r | |
adbcbf8f | 642 | \r |
643 | /**\r | |
644 | Read by using the Disk IO protocol on the parent device. Lba addresses\r | |
645 | must be converted to byte offsets.\r | |
646 | \r | |
647 | @param This Protocol instance pointer.\r | |
648 | @param MediaId Id of the media, changes every time the media is replaced.\r | |
649 | @param Lba The starting Logical Block Address to read from\r | |
650 | @param BufferSize Size of Buffer, must be a multiple of device block size.\r | |
651 | @param Buffer Buffer containing read data\r | |
652 | \r | |
653 | @retval EFI_SUCCESS The data was read correctly from the device.\r | |
654 | @retval EFI_DEVICE_ERROR The device reported an error while performing the read.\r | |
655 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
656 | @retval EFI_MEDIA_CHANGED The MediaId does not matched the current device.\r | |
657 | @retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.\r | |
658 | @retval EFI_INVALID_PARAMETER The read request contains device addresses that are not\r | |
659 | valid for the device.\r | |
660 | \r | |
661 | **/\r | |
adbcbf8f | 662 | EFI_STATUS\r |
663 | EFIAPI\r | |
664 | PartitionReadBlocks (\r | |
665 | IN EFI_BLOCK_IO_PROTOCOL *This,\r | |
666 | IN UINT32 MediaId,\r | |
667 | IN EFI_LBA Lba,\r | |
668 | IN UINTN BufferSize,\r | |
669 | OUT VOID *Buffer\r | |
670 | )\r | |
671 | {\r | |
672 | PARTITION_PRIVATE_DATA *Private;\r | |
673 | UINT64 Offset;\r | |
674 | \r | |
675 | Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (This);\r | |
676 | \r | |
677 | if (BufferSize % Private->BlockSize != 0) {\r | |
fcf5e49d | 678 | return ProbeMediaStatus (Private->DiskIo, MediaId, EFI_BAD_BUFFER_SIZE);\r |
adbcbf8f | 679 | }\r |
680 | \r | |
681 | Offset = MultU64x32 (Lba, Private->BlockSize) + Private->Start;\r | |
682 | if (Offset + BufferSize > Private->End) {\r | |
fcf5e49d | 683 | return ProbeMediaStatus (Private->DiskIo, MediaId, EFI_INVALID_PARAMETER);\r |
adbcbf8f | 684 | }\r |
685 | //\r | |
686 | // Because some kinds of partition have different block size from their parent\r | |
687 | // device, we call the Disk IO protocol on the parent device, not the Block IO\r | |
688 | // protocol\r | |
689 | //\r | |
690 | return Private->DiskIo->ReadDisk (Private->DiskIo, MediaId, Offset, BufferSize, Buffer);\r | |
691 | }\r | |
692 | \r | |
693 | /**\r | |
694 | Write by using the Disk IO protocol on the parent device. Lba addresses\r | |
695 | must be converted to byte offsets.\r | |
696 | \r | |
490b5ea1 | 697 | @param[in] This Protocol instance pointer.\r |
698 | @param[in] MediaId Id of the media, changes every time the media is replaced.\r | |
699 | @param[in] Lba The starting Logical Block Address to read from\r | |
700 | @param[in] BufferSize Size of Buffer, must be a multiple of device block size.\r | |
701 | @param[in] Buffer Buffer containing data to be written to device.\r | |
adbcbf8f | 702 | \r |
703 | @retval EFI_SUCCESS The data was written correctly to the device.\r | |
704 | @retval EFI_WRITE_PROTECTED The device can not be written to.\r | |
705 | @retval EFI_DEVICE_ERROR The device reported an error while performing the write.\r | |
706 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
707 | @retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device.\r | |
708 | @retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.\r | |
709 | @retval EFI_INVALID_PARAMETER The write request contains a LBA that is not\r | |
710 | valid for the device.\r | |
711 | \r | |
712 | **/\r | |
adbcbf8f | 713 | EFI_STATUS\r |
714 | EFIAPI\r | |
715 | PartitionWriteBlocks (\r | |
716 | IN EFI_BLOCK_IO_PROTOCOL *This,\r | |
717 | IN UINT32 MediaId,\r | |
718 | IN EFI_LBA Lba,\r | |
719 | IN UINTN BufferSize,\r | |
490b5ea1 | 720 | IN VOID *Buffer\r |
adbcbf8f | 721 | )\r |
722 | {\r | |
723 | PARTITION_PRIVATE_DATA *Private;\r | |
724 | UINT64 Offset;\r | |
725 | \r | |
726 | Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (This);\r | |
727 | \r | |
728 | if (BufferSize % Private->BlockSize != 0) {\r | |
fcf5e49d | 729 | return ProbeMediaStatus (Private->DiskIo, MediaId, EFI_BAD_BUFFER_SIZE);\r |
adbcbf8f | 730 | }\r |
731 | \r | |
732 | Offset = MultU64x32 (Lba, Private->BlockSize) + Private->Start;\r | |
733 | if (Offset + BufferSize > Private->End) {\r | |
fcf5e49d | 734 | return ProbeMediaStatus (Private->DiskIo, MediaId, EFI_INVALID_PARAMETER);\r |
adbcbf8f | 735 | }\r |
736 | //\r | |
737 | // Because some kinds of partition have different block size from their parent\r | |
738 | // device, we call the Disk IO protocol on the parent device, not the Block IO\r | |
739 | // protocol\r | |
740 | //\r | |
741 | return Private->DiskIo->WriteDisk (Private->DiskIo, MediaId, Offset, BufferSize, Buffer);\r | |
742 | }\r | |
743 | \r | |
744 | \r | |
745 | /**\r | |
746 | Flush the parent Block Device.\r | |
747 | \r | |
748 | @param This Protocol instance pointer.\r | |
749 | \r | |
750 | @retval EFI_SUCCESS All outstanding data was written to the device\r | |
751 | @retval EFI_DEVICE_ERROR The device reported an error while writting back the data\r | |
752 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
753 | \r | |
754 | **/\r | |
adbcbf8f | 755 | EFI_STATUS\r |
756 | EFIAPI\r | |
757 | PartitionFlushBlocks (\r | |
758 | IN EFI_BLOCK_IO_PROTOCOL *This\r | |
759 | )\r | |
760 | {\r | |
761 | PARTITION_PRIVATE_DATA *Private;\r | |
762 | \r | |
763 | Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (This);\r | |
764 | \r | |
765 | return Private->ParentBlockIo->FlushBlocks (Private->ParentBlockIo);\r | |
766 | }\r | |
767 | \r | |
65fd3952 RN |
768 | /**\r |
769 | Probe the media status and return EFI_NO_MEDIA or EFI_MEDIA_CHANGED\r | |
770 | for no media or media change case. Otherwise DefaultStatus is returned.\r | |
771 | \r | |
493d8e3a | 772 | @param DiskIo2 Pointer to the DiskIo2 instance.\r |
65fd3952 RN |
773 | @param MediaId Id of the media, changes every time the media is replaced.\r |
774 | @param DefaultStatus The default status to return when it's not the no media\r | |
775 | or media change case.\r | |
776 | \r | |
777 | @retval EFI_NO_MEDIA There is no media.\r | |
778 | @retval EFI_MEDIA_CHANGED The media was changed.\r | |
779 | @retval others The default status to return.\r | |
780 | **/\r | |
781 | EFI_STATUS\r | |
782 | ProbeMediaStatusEx (\r | |
493d8e3a | 783 | IN EFI_DISK_IO2_PROTOCOL *DiskIo2,\r |
65fd3952 RN |
784 | IN UINT32 MediaId,\r |
785 | IN EFI_STATUS DefaultStatus\r | |
786 | )\r | |
787 | {\r | |
788 | EFI_STATUS Status;\r | |
68599525 | 789 | UINT8 Buffer[1];\r |
65fd3952 RN |
790 | \r |
791 | //\r | |
68599525 RN |
792 | // Read 1 byte from offset 0 to check if the MediaId is still valid.\r |
793 | // The reading operation is synchronious thus it is not worth it to\r | |
794 | // allocate a buffer from the pool. The destination buffer for the\r | |
795 | // data is in the stack.\r | |
65fd3952 | 796 | //\r |
68599525 | 797 | Status = DiskIo2->ReadDiskEx (DiskIo2, MediaId, 0, NULL, 1, (VOID*)Buffer);\r |
65fd3952 RN |
798 | if ((Status == EFI_NO_MEDIA) || (Status == EFI_MEDIA_CHANGED)) {\r |
799 | return Status;\r | |
800 | }\r | |
801 | return DefaultStatus;\r | |
802 | }\r | |
803 | \r | |
490b5ea1 | 804 | /**\r |
805 | Reset the Block Device throught Block I/O2 protocol.\r | |
806 | \r | |
807 | @param This Protocol instance pointer.\r | |
808 | @param ExtendedVerification Driver may perform diagnostics on reset.\r | |
809 | \r | |
810 | @retval EFI_SUCCESS The device was reset.\r | |
811 | @retval EFI_DEVICE_ERROR The device is not functioning properly and could\r | |
812 | not be reset.\r | |
813 | \r | |
814 | **/\r | |
815 | EFI_STATUS\r | |
816 | EFIAPI\r | |
817 | PartitionResetEx (\r | |
818 | IN EFI_BLOCK_IO2_PROTOCOL *This,\r | |
819 | IN BOOLEAN ExtendedVerification\r | |
820 | )\r | |
821 | {\r | |
822 | PARTITION_PRIVATE_DATA *Private;\r | |
823 | \r | |
824 | Private = PARTITION_DEVICE_FROM_BLOCK_IO2_THIS (This);\r | |
825 | \r | |
826 | return Private->ParentBlockIo2->Reset (\r | |
827 | Private->ParentBlockIo2,\r | |
828 | ExtendedVerification\r | |
829 | );\r | |
830 | }\r | |
831 | \r | |
493d8e3a RN |
832 | /**\r |
833 | The general callback for the DiskIo2 interfaces.\r | |
834 | @param Event Event whose notification function is being invoked.\r | |
835 | @param Context The pointer to the notification function's context,\r | |
836 | which points to the PARTITION_ACCESS_TASK instance.\r | |
837 | **/\r | |
838 | VOID\r | |
839 | EFIAPI\r | |
840 | PartitionOnAccessComplete (\r | |
841 | IN EFI_EVENT Event,\r | |
842 | IN VOID *Context\r | |
843 | )\r | |
844 | {\r | |
845 | PARTITION_ACCESS_TASK *Task;\r | |
846 | \r | |
847 | Task = (PARTITION_ACCESS_TASK *) Context;\r | |
848 | \r | |
849 | gBS->CloseEvent (Event);\r | |
850 | \r | |
851 | Task->BlockIo2Token->TransactionStatus = Task->DiskIo2Token.TransactionStatus;\r | |
852 | gBS->SignalEvent (Task->BlockIo2Token->Event);\r | |
853 | \r | |
854 | FreePool (Task);\r | |
855 | }\r | |
856 | \r | |
857 | /**\r | |
858 | Create a new PARTITION_ACCESS_TASK instance.\r | |
859 | \r | |
860 | @param Token Pointer to the EFI_BLOCK_IO2_TOKEN.\r | |
861 | \r | |
862 | @return Pointer to the created PARTITION_ACCESS_TASK instance or NULL upon failure.\r | |
863 | **/\r | |
864 | PARTITION_ACCESS_TASK *\r | |
865 | PartitionCreateAccessTask (\r | |
866 | IN EFI_BLOCK_IO2_TOKEN *Token\r | |
867 | )\r | |
868 | {\r | |
869 | EFI_STATUS Status;\r | |
870 | PARTITION_ACCESS_TASK *Task;\r | |
871 | \r | |
872 | Task = AllocatePool (sizeof (*Task));\r | |
873 | if (Task == NULL) {\r | |
874 | return NULL;\r | |
875 | }\r | |
876 | \r | |
877 | Status = gBS->CreateEvent (\r | |
878 | EVT_NOTIFY_SIGNAL,\r | |
80c83a69 | 879 | TPL_NOTIFY,\r |
493d8e3a RN |
880 | PartitionOnAccessComplete,\r |
881 | Task,\r | |
882 | &Task->DiskIo2Token.Event\r | |
883 | );\r | |
884 | if (EFI_ERROR (Status)) {\r | |
885 | FreePool (Task);\r | |
886 | return NULL;\r | |
887 | }\r | |
888 | \r | |
889 | Task->BlockIo2Token = Token;\r | |
890 | \r | |
891 | return Task;\r | |
892 | }\r | |
893 | \r | |
490b5ea1 | 894 | /**\r |
895 | Read BufferSize bytes from Lba into Buffer.\r | |
d1102dba | 896 | \r |
490b5ea1 | 897 | This function reads the requested number of blocks from the device. All the\r |
898 | blocks are read, or an error is returned.\r | |
899 | If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_or EFI_MEDIA_CHANGED is returned and\r | |
900 | non-blocking I/O is being used, the Event associated with this request will\r | |
901 | not be signaled.\r | |
902 | \r | |
903 | @param[in] This Indicates a pointer to the calling context.\r | |
d1102dba | 904 | @param[in] MediaId Id of the media, changes every time the media is\r |
490b5ea1 | 905 | replaced.\r |
906 | @param[in] Lba The starting Logical Block Address to read from.\r | |
d1102dba LG |
907 | @param[in, out] Token A pointer to the token associated with the transaction.\r |
908 | @param[in] BufferSize Size of Buffer, must be a multiple of device block size.\r | |
909 | @param[out] Buffer A pointer to the destination buffer for the data. The\r | |
910 | caller is responsible for either having implicit or\r | |
490b5ea1 | 911 | explicit ownership of the buffer.\r |
912 | \r | |
913 | @retval EFI_SUCCESS The read request was queued if Token->Event is\r | |
914 | not NULL.The data was read correctly from the\r | |
915 | device if the Token->Event is NULL.\r | |
916 | @retval EFI_DEVICE_ERROR The device reported an error while performing\r | |
917 | the read.\r | |
918 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
919 | @retval EFI_MEDIA_CHANGED The MediaId is not for the current media.\r | |
920 | @retval EFI_BAD_BUFFER_SIZE The BufferSize parameter is not a multiple of the\r | |
921 | intrinsic block size of the device.\r | |
d1102dba | 922 | @retval EFI_INVALID_PARAMETER The read request contains LBAs that are not valid,\r |
490b5ea1 | 923 | or the buffer is not on proper alignment.\r |
924 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack\r | |
925 | of resources.\r | |
926 | **/\r | |
927 | EFI_STATUS\r | |
928 | EFIAPI\r | |
929 | PartitionReadBlocksEx (\r | |
930 | IN EFI_BLOCK_IO2_PROTOCOL *This,\r | |
931 | IN UINT32 MediaId,\r | |
932 | IN EFI_LBA Lba,\r | |
933 | IN OUT EFI_BLOCK_IO2_TOKEN *Token,\r | |
934 | IN UINTN BufferSize,\r | |
935 | OUT VOID *Buffer\r | |
936 | )\r | |
937 | {\r | |
493d8e3a | 938 | EFI_STATUS Status;\r |
490b5ea1 | 939 | PARTITION_PRIVATE_DATA *Private;\r |
940 | UINT64 Offset;\r | |
493d8e3a | 941 | PARTITION_ACCESS_TASK *Task;\r |
490b5ea1 | 942 | \r |
65fd3952 RN |
943 | Private = PARTITION_DEVICE_FROM_BLOCK_IO2_THIS (This);\r |
944 | \r | |
490b5ea1 | 945 | if (BufferSize % Private->BlockSize != 0) {\r |
493d8e3a | 946 | return ProbeMediaStatusEx (Private->DiskIo2, MediaId, EFI_BAD_BUFFER_SIZE);\r |
490b5ea1 | 947 | }\r |
948 | \r | |
949 | Offset = MultU64x32 (Lba, Private->BlockSize) + Private->Start;\r | |
950 | if (Offset + BufferSize > Private->End) {\r | |
493d8e3a | 951 | return ProbeMediaStatusEx (Private->DiskIo2, MediaId, EFI_INVALID_PARAMETER);\r |
490b5ea1 | 952 | }\r |
953 | \r | |
493d8e3a RN |
954 | if ((Token != NULL) && (Token->Event != NULL)) {\r |
955 | Task = PartitionCreateAccessTask (Token);\r | |
956 | if (Task == NULL) {\r | |
957 | return EFI_OUT_OF_RESOURCES;\r | |
958 | }\r | |
490b5ea1 | 959 | \r |
493d8e3a RN |
960 | Status = Private->DiskIo2->ReadDiskEx (Private->DiskIo2, MediaId, Offset, &Task->DiskIo2Token, BufferSize, Buffer);\r |
961 | if (EFI_ERROR (Status)) {\r | |
962 | gBS->CloseEvent (Task->DiskIo2Token.Event);\r | |
963 | FreePool (Task);\r | |
964 | }\r | |
965 | } else {\r | |
966 | Status = Private->DiskIo2->ReadDiskEx (Private->DiskIo2, MediaId, Offset, NULL, BufferSize, Buffer);\r | |
490b5ea1 | 967 | }\r |
968 | \r | |
493d8e3a | 969 | return Status;\r |
490b5ea1 | 970 | }\r |
971 | \r | |
972 | /**\r | |
973 | Write BufferSize bytes from Lba into Buffer.\r | |
974 | \r | |
975 | This function writes the requested number of blocks to the device. All blocks\r | |
976 | are written, or an error is returned.If EFI_DEVICE_ERROR, EFI_NO_MEDIA,\r | |
977 | EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED is returned and non-blocking I/O is\r | |
978 | being used, the Event associated with this request will not be signaled.\r | |
979 | \r | |
980 | @param[in] This Indicates a pointer to the calling context.\r | |
981 | @param[in] MediaId The media ID that the write request is for.\r | |
982 | @param[in] Lba The starting logical block address to be written. The\r | |
983 | caller is responsible for writing to only legitimate\r | |
984 | locations.\r | |
985 | @param[in, out] Token A pointer to the token associated with the transaction.\r | |
986 | @param[in] BufferSize Size of Buffer, must be a multiple of device block size.\r | |
987 | @param[in] Buffer A pointer to the source buffer for the data.\r | |
988 | \r | |
989 | @retval EFI_SUCCESS The write request was queued if Event is not NULL.\r | |
990 | The data was written correctly to the device if\r | |
991 | the Event is NULL.\r | |
992 | @retval EFI_WRITE_PROTECTED The device can not be written to.\r | |
993 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
994 | @retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device.\r | |
995 | @retval EFI_DEVICE_ERROR The device reported an error while performing the write.\r | |
996 | @retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.\r | |
d1102dba | 997 | @retval EFI_INVALID_PARAMETER The write request contains LBAs that are not valid,\r |
490b5ea1 | 998 | or the buffer is not on proper alignment.\r |
999 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack\r | |
1000 | of resources.\r | |
1001 | \r | |
1002 | **/\r | |
1003 | EFI_STATUS\r | |
1004 | EFIAPI\r | |
1005 | PartitionWriteBlocksEx (\r | |
1006 | IN EFI_BLOCK_IO2_PROTOCOL *This,\r | |
1007 | IN UINT32 MediaId,\r | |
1008 | IN EFI_LBA Lba,\r | |
1009 | IN OUT EFI_BLOCK_IO2_TOKEN *Token,\r | |
1010 | IN UINTN BufferSize,\r | |
1011 | IN VOID *Buffer\r | |
1012 | )\r | |
1013 | {\r | |
493d8e3a | 1014 | EFI_STATUS Status;\r |
490b5ea1 | 1015 | PARTITION_PRIVATE_DATA *Private;\r |
1016 | UINT64 Offset;\r | |
493d8e3a | 1017 | PARTITION_ACCESS_TASK *Task;\r |
490b5ea1 | 1018 | \r |
65fd3952 RN |
1019 | Private = PARTITION_DEVICE_FROM_BLOCK_IO2_THIS (This);\r |
1020 | \r | |
490b5ea1 | 1021 | if (BufferSize % Private->BlockSize != 0) {\r |
493d8e3a | 1022 | return ProbeMediaStatusEx (Private->DiskIo2, MediaId, EFI_BAD_BUFFER_SIZE);\r |
490b5ea1 | 1023 | }\r |
1024 | \r | |
1025 | Offset = MultU64x32 (Lba, Private->BlockSize) + Private->Start;\r | |
1026 | if (Offset + BufferSize > Private->End) {\r | |
493d8e3a | 1027 | return ProbeMediaStatusEx (Private->DiskIo2, MediaId, EFI_INVALID_PARAMETER);\r |
490b5ea1 | 1028 | }\r |
d1102dba | 1029 | \r |
493d8e3a RN |
1030 | if ((Token != NULL) && (Token->Event != NULL)) {\r |
1031 | Task = PartitionCreateAccessTask (Token);\r | |
1032 | if (Task == NULL) {\r | |
1033 | return EFI_OUT_OF_RESOURCES;\r | |
1034 | }\r | |
490b5ea1 | 1035 | \r |
493d8e3a RN |
1036 | Status = Private->DiskIo2->WriteDiskEx (Private->DiskIo2, MediaId, Offset, &Task->DiskIo2Token, BufferSize, Buffer);\r |
1037 | if (EFI_ERROR (Status)) {\r | |
1038 | gBS->CloseEvent (Task->DiskIo2Token.Event);\r | |
1039 | FreePool (Task);\r | |
1040 | }\r | |
1041 | } else {\r | |
1042 | Status = Private->DiskIo2->WriteDiskEx (Private->DiskIo2, MediaId, Offset, NULL, BufferSize, Buffer);\r | |
490b5ea1 | 1043 | }\r |
493d8e3a | 1044 | return Status;\r |
490b5ea1 | 1045 | }\r |
1046 | \r | |
1047 | /**\r | |
1048 | Flush the Block Device.\r | |
d1102dba | 1049 | \r |
490b5ea1 | 1050 | If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED\r |
1051 | is returned and non-blocking I/O is being used, the Event associated with\r | |
d1102dba | 1052 | this request will not be signaled.\r |
490b5ea1 | 1053 | \r |
1054 | @param[in] This Indicates a pointer to the calling context.\r | |
86d8e199 | 1055 | @param[in, out] Token A pointer to the token associated with the transaction\r |
490b5ea1 | 1056 | \r |
1057 | @retval EFI_SUCCESS The flush request was queued if Event is not NULL.\r | |
1058 | All outstanding data was written correctly to the\r | |
1059 | device if the Event is NULL.\r | |
1060 | @retval EFI_DEVICE_ERROR The device reported an error while writting back\r | |
1061 | the data.\r | |
1062 | @retval EFI_WRITE_PROTECTED The device cannot be written to.\r | |
1063 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
1064 | @retval EFI_MEDIA_CHANGED The MediaId is not for the current media.\r | |
1065 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack\r | |
1066 | of resources.\r | |
1067 | \r | |
1068 | **/\r | |
1069 | EFI_STATUS\r | |
1070 | EFIAPI\r | |
1071 | PartitionFlushBlocksEx (\r | |
1072 | IN EFI_BLOCK_IO2_PROTOCOL *This,\r | |
1073 | IN OUT EFI_BLOCK_IO2_TOKEN *Token\r | |
1074 | )\r | |
1075 | {\r | |
493d8e3a | 1076 | EFI_STATUS Status;\r |
490b5ea1 | 1077 | PARTITION_PRIVATE_DATA *Private;\r |
493d8e3a | 1078 | PARTITION_ACCESS_TASK *Task;\r |
490b5ea1 | 1079 | \r |
1080 | Private = PARTITION_DEVICE_FROM_BLOCK_IO2_THIS (This);\r | |
1081 | \r | |
493d8e3a RN |
1082 | if ((Token != NULL) && (Token->Event != NULL)) {\r |
1083 | Task = PartitionCreateAccessTask (Token);\r | |
1084 | if (Task == NULL) {\r | |
1085 | return EFI_OUT_OF_RESOURCES;\r | |
1086 | }\r | |
490b5ea1 | 1087 | \r |
493d8e3a RN |
1088 | Status = Private->DiskIo2->FlushDiskEx (Private->DiskIo2, &Task->DiskIo2Token);\r |
1089 | if (EFI_ERROR (Status)) {\r | |
1090 | gBS->CloseEvent (Task->DiskIo2Token.Event);\r | |
1091 | FreePool (Task);\r | |
1092 | }\r | |
1093 | } else {\r | |
1094 | Status = Private->DiskIo2->FlushDiskEx (Private->DiskIo2, NULL);\r | |
1095 | }\r | |
1096 | return Status;\r | |
490b5ea1 | 1097 | }\r |
adbcbf8f | 1098 | \r |
1099 | \r | |
1100 | /**\r | |
1101 | Create a child handle for a logical block device that represents the\r | |
1102 | bytes Start to End of the Parent Block IO device.\r | |
1103 | \r | |
490b5ea1 | 1104 | @param[in] This Protocol instance pointer.\r |
1105 | @param[in] ParentHandle Parent Handle for new child.\r | |
1106 | @param[in] ParentDiskIo Parent DiskIo interface.\r | |
493d8e3a | 1107 | @param[in] ParentDiskIo2 Parent DiskIo2 interface.\r |
490b5ea1 | 1108 | @param[in] ParentBlockIo Parent BlockIo interface.\r |
1109 | @param[in] ParentBlockIo2 Parent BlockIo2 interface.\r | |
1110 | @param[in] ParentDevicePath Parent Device Path.\r | |
1111 | @param[in] DevicePathNode Child Device Path node.\r | |
3a3d62d2 | 1112 | @param[in] PartitionInfo Child Partition Information interface.\r |
490b5ea1 | 1113 | @param[in] Start Start Block.\r |
1114 | @param[in] End End Block.\r | |
1115 | @param[in] BlockSize Child block size.\r | |
709c9fd5 | 1116 | @param[in] TypeGuid Partition GUID Type.\r |
490b5ea1 | 1117 | \r |
1118 | @retval EFI_SUCCESS A child handle was added.\r | |
1119 | @retval other A child handle was not added.\r | |
adbcbf8f | 1120 | \r |
1121 | **/\r | |
1122 | EFI_STATUS\r | |
1123 | PartitionInstallChildHandle (\r | |
1124 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
1125 | IN EFI_HANDLE ParentHandle,\r | |
1126 | IN EFI_DISK_IO_PROTOCOL *ParentDiskIo,\r | |
493d8e3a | 1127 | IN EFI_DISK_IO2_PROTOCOL *ParentDiskIo2,\r |
adbcbf8f | 1128 | IN EFI_BLOCK_IO_PROTOCOL *ParentBlockIo,\r |
490b5ea1 | 1129 | IN EFI_BLOCK_IO2_PROTOCOL *ParentBlockIo2,\r |
adbcbf8f | 1130 | IN EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath,\r |
1131 | IN EFI_DEVICE_PATH_PROTOCOL *DevicePathNode,\r | |
3a3d62d2 | 1132 | IN EFI_PARTITION_INFO_PROTOCOL *PartitionInfo,\r |
adbcbf8f | 1133 | IN EFI_LBA Start,\r |
1134 | IN EFI_LBA End,\r | |
709c9fd5 JB |
1135 | IN UINT32 BlockSize,\r |
1136 | IN EFI_GUID *TypeGuid\r | |
adbcbf8f | 1137 | )\r |
1138 | {\r | |
1139 | EFI_STATUS Status;\r | |
1140 | PARTITION_PRIVATE_DATA *Private;\r | |
1141 | \r | |
490b5ea1 | 1142 | Status = EFI_SUCCESS;\r |
adbcbf8f | 1143 | Private = AllocateZeroPool (sizeof (PARTITION_PRIVATE_DATA));\r |
1144 | if (Private == NULL) {\r | |
1145 | return EFI_OUT_OF_RESOURCES;\r | |
1146 | }\r | |
1147 | \r | |
1148 | Private->Signature = PARTITION_PRIVATE_DATA_SIGNATURE;\r | |
1149 | \r | |
1150 | Private->Start = MultU64x32 (Start, ParentBlockIo->Media->BlockSize);\r | |
1151 | Private->End = MultU64x32 (End + 1, ParentBlockIo->Media->BlockSize);\r | |
1152 | \r | |
1153 | Private->BlockSize = BlockSize;\r | |
1154 | Private->ParentBlockIo = ParentBlockIo;\r | |
490b5ea1 | 1155 | Private->ParentBlockIo2 = ParentBlockIo2;\r |
adbcbf8f | 1156 | Private->DiskIo = ParentDiskIo;\r |
493d8e3a | 1157 | Private->DiskIo2 = ParentDiskIo2;\r |
adbcbf8f | 1158 | \r |
d0844d13 | 1159 | //\r |
1160 | // Set the BlockIO into Private Data.\r | |
1161 | //\r | |
1162 | Private->BlockIo.Revision = ParentBlockIo->Revision;\r | |
d1102dba | 1163 | \r |
d0844d13 | 1164 | Private->BlockIo.Media = &Private->Media;\r |
1165 | CopyMem (Private->BlockIo.Media, ParentBlockIo->Media, sizeof (EFI_BLOCK_IO_MEDIA));\r | |
490b5ea1 | 1166 | \r |
d0844d13 | 1167 | Private->BlockIo.Reset = PartitionReset;\r |
1168 | Private->BlockIo.ReadBlocks = PartitionReadBlocks;\r | |
1169 | Private->BlockIo.WriteBlocks = PartitionWriteBlocks;\r | |
1170 | Private->BlockIo.FlushBlocks = PartitionFlushBlocks;\r | |
490b5ea1 | 1171 | \r |
d0844d13 | 1172 | //\r |
1173 | // Set the BlockIO2 into Private Data.\r | |
1174 | //\r | |
493d8e3a RN |
1175 | if (Private->DiskIo2 != NULL) {\r |
1176 | ASSERT (Private->ParentBlockIo2 != NULL);\r | |
490b5ea1 | 1177 | Private->BlockIo2.Media = &Private->Media2;\r |
1178 | CopyMem (Private->BlockIo2.Media, ParentBlockIo2->Media, sizeof (EFI_BLOCK_IO_MEDIA));\r | |
1179 | \r | |
1180 | Private->BlockIo2.Reset = PartitionResetEx;\r | |
1181 | Private->BlockIo2.ReadBlocksEx = PartitionReadBlocksEx;\r | |
1182 | Private->BlockIo2.WriteBlocksEx = PartitionWriteBlocksEx;\r | |
d1102dba | 1183 | Private->BlockIo2.FlushBlocksEx = PartitionFlushBlocksEx;\r |
490b5ea1 | 1184 | }\r |
67f802ed | 1185 | \r |
67f802ed | 1186 | Private->Media.IoAlign = 0;\r |
490b5ea1 | 1187 | Private->Media.LogicalPartition = TRUE;\r |
adbcbf8f | 1188 | Private->Media.LastBlock = DivU64x32 (\r |
1189 | MultU64x32 (\r | |
1190 | End - Start + 1,\r | |
d0844d13 | 1191 | ParentBlockIo->Media->BlockSize\r |
adbcbf8f | 1192 | ),\r |
490b5ea1 | 1193 | BlockSize\r |
adbcbf8f | 1194 | ) - 1;\r |
1195 | \r | |
67f802ed | 1196 | Private->Media.BlockSize = (UINT32) BlockSize;\r |
adbcbf8f | 1197 | \r |
493d8e3a | 1198 | Private->Media2.IoAlign = 0;\r |
490b5ea1 | 1199 | Private->Media2.LogicalPartition = TRUE;\r |
1200 | Private->Media2.LastBlock = Private->Media.LastBlock;\r | |
1201 | Private->Media2.BlockSize = (UINT32) BlockSize;\r | |
1202 | \r | |
fe3b68bb | 1203 | //\r |
0e87144e | 1204 | // Per UEFI Spec, LowestAlignedLba, LogicalBlocksPerPhysicalBlock and OptimalTransferLengthGranularity must be 0\r |
fe3b68bb RN |
1205 | // for logical partitions.\r |
1206 | //\r | |
1207 | if (Private->BlockIo.Revision >= EFI_BLOCK_IO_PROTOCOL_REVISION2) {\r | |
c582ad45 EB |
1208 | Private->Media.LowestAlignedLba = 0;\r |
1209 | Private->Media.LogicalBlocksPerPhysicalBlock = 0;\r | |
1210 | Private->Media2.LowestAlignedLba = 0;\r | |
1211 | Private->Media2.LogicalBlocksPerPhysicalBlock = 0;\r | |
0e87144e | 1212 | if (Private->BlockIo.Revision >= EFI_BLOCK_IO_PROTOCOL_REVISION3) {\r |
c582ad45 EB |
1213 | Private->Media.OptimalTransferLengthGranularity = 0;\r |
1214 | Private->Media2.OptimalTransferLengthGranularity = 0;\r | |
0e87144e | 1215 | }\r |
fe3b68bb RN |
1216 | }\r |
1217 | \r | |
490b5ea1 | 1218 | Private->DevicePath = AppendDevicePathNode (ParentDevicePath, DevicePathNode);\r |
adbcbf8f | 1219 | \r |
1220 | if (Private->DevicePath == NULL) {\r | |
1221 | FreePool (Private);\r | |
1222 | return EFI_OUT_OF_RESOURCES;\r | |
1223 | }\r | |
1224 | \r | |
3a3d62d2 HW |
1225 | //\r |
1226 | // Set the PartitionInfo into Private Data.\r | |
1227 | //\r | |
1228 | CopyMem (&Private->PartitionInfo, PartitionInfo, sizeof (EFI_PARTITION_INFO_PROTOCOL));\r | |
1229 | \r | |
709c9fd5 JB |
1230 | if (TypeGuid != NULL) {\r |
1231 | CopyGuid(&(Private->TypeGuid), TypeGuid);\r | |
adbcbf8f | 1232 | } else {\r |
709c9fd5 | 1233 | ZeroMem ((VOID *)&(Private->TypeGuid), sizeof (EFI_GUID));\r |
adbcbf8f | 1234 | }\r |
490b5ea1 | 1235 | \r |
adbcbf8f | 1236 | //\r |
d1102dba | 1237 | // Create the new handle.\r |
adbcbf8f | 1238 | //\r |
1239 | Private->Handle = NULL;\r | |
493d8e3a | 1240 | if (Private->DiskIo2 != NULL) {\r |
490b5ea1 | 1241 | Status = gBS->InstallMultipleProtocolInterfaces (\r |
1242 | &Private->Handle,\r | |
1243 | &gEfiDevicePathProtocolGuid,\r | |
1244 | Private->DevicePath,\r | |
1245 | &gEfiBlockIoProtocolGuid,\r | |
1246 | &Private->BlockIo,\r | |
1247 | &gEfiBlockIo2ProtocolGuid,\r | |
1248 | &Private->BlockIo2,\r | |
3a3d62d2 HW |
1249 | &gEfiPartitionInfoProtocolGuid,\r |
1250 | &Private->PartitionInfo,\r | |
709c9fd5 | 1251 | TypeGuid,\r |
490b5ea1 | 1252 | NULL,\r |
1253 | NULL\r | |
1254 | );\r | |
d1102dba | 1255 | } else {\r |
d0844d13 | 1256 | Status = gBS->InstallMultipleProtocolInterfaces (\r |
1257 | &Private->Handle,\r | |
1258 | &gEfiDevicePathProtocolGuid,\r | |
1259 | Private->DevicePath,\r | |
1260 | &gEfiBlockIoProtocolGuid,\r | |
1261 | &Private->BlockIo,\r | |
3a3d62d2 HW |
1262 | &gEfiPartitionInfoProtocolGuid,\r |
1263 | &Private->PartitionInfo,\r | |
709c9fd5 | 1264 | TypeGuid,\r |
d0844d13 | 1265 | NULL,\r |
1266 | NULL\r | |
1267 | );\r | |
490b5ea1 | 1268 | }\r |
adbcbf8f | 1269 | \r |
1270 | if (!EFI_ERROR (Status)) {\r | |
1271 | //\r | |
1272 | // Open the Parent Handle for the child\r | |
1273 | //\r | |
1274 | Status = gBS->OpenProtocol (\r | |
1275 | ParentHandle,\r | |
1276 | &gEfiDiskIoProtocolGuid,\r | |
1277 | (VOID **) &ParentDiskIo,\r | |
1278 | This->DriverBindingHandle,\r | |
1279 | Private->Handle,\r | |
1280 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r | |
1281 | );\r | |
1282 | } else {\r | |
1283 | FreePool (Private->DevicePath);\r | |
1284 | FreePool (Private);\r | |
1285 | }\r | |
1286 | \r | |
1287 | return Status;\r | |
1288 | }\r | |
1289 | \r | |
1290 | \r | |
1291 | /**\r | |
1292 | The user Entry Point for module Partition. The user code starts with this function.\r | |
1293 | \r | |
d1102dba | 1294 | @param[in] ImageHandle The firmware allocated handle for the EFI image.\r |
adbcbf8f | 1295 | @param[in] SystemTable A pointer to the EFI System Table.\r |
d1102dba | 1296 | \r |
adbcbf8f | 1297 | @retval EFI_SUCCESS The entry point is executed successfully.\r |
1298 | @retval other Some error occurs when executing this entry point.\r | |
1299 | \r | |
1300 | **/\r | |
1301 | EFI_STATUS\r | |
1302 | EFIAPI\r | |
1303 | InitializePartition (\r | |
1304 | IN EFI_HANDLE ImageHandle,\r | |
1305 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
1306 | )\r | |
1307 | {\r | |
1308 | EFI_STATUS Status;\r | |
1309 | \r | |
1310 | //\r | |
1311 | // Install driver model protocol(s).\r | |
1312 | //\r | |
d38a0f44 | 1313 | Status = EfiLibInstallDriverBindingComponentName2 (\r |
adbcbf8f | 1314 | ImageHandle,\r |
1315 | SystemTable,\r | |
1316 | &gPartitionDriverBinding,\r | |
1317 | ImageHandle,\r | |
1318 | &gPartitionComponentName,\r | |
d38a0f44 | 1319 | &gPartitionComponentName2\r |
adbcbf8f | 1320 | );\r |
1321 | ASSERT_EFI_ERROR (Status);\r | |
1322 | \r | |
1323 | \r | |
1324 | return Status;\r | |
1325 | }\r | |
1326 | \r | |
e3325721 HW |
1327 | \r |
1328 | /**\r | |
1329 | Test to see if there is any child on ControllerHandle.\r | |
1330 | \r | |
1331 | @param[in] ControllerHandle Handle of device to test.\r | |
1332 | \r | |
1333 | @retval TRUE There are children on the ControllerHandle.\r | |
1334 | @retval FALSE No child is on the ControllerHandle.\r | |
1335 | \r | |
1336 | **/\r | |
1337 | BOOLEAN\r | |
1338 | HasChildren (\r | |
1339 | IN EFI_HANDLE ControllerHandle\r | |
1340 | )\r | |
1341 | {\r | |
1342 | EFI_OPEN_PROTOCOL_INFORMATION_ENTRY *OpenInfoBuffer;\r | |
1343 | UINTN EntryCount;\r | |
1344 | EFI_STATUS Status;\r | |
1345 | UINTN Index;\r | |
1346 | \r | |
1347 | Status = gBS->OpenProtocolInformation (\r | |
1348 | ControllerHandle,\r | |
1349 | &gEfiDiskIoProtocolGuid,\r | |
1350 | &OpenInfoBuffer,\r | |
1351 | &EntryCount\r | |
1352 | );\r | |
1353 | ASSERT_EFI_ERROR (Status);\r | |
1354 | \r | |
1355 | for (Index = 0; Index < EntryCount; Index++) {\r | |
1356 | if ((OpenInfoBuffer[Index].Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) != 0) {\r | |
1357 | break;\r | |
1358 | }\r | |
1359 | }\r | |
1360 | FreePool (OpenInfoBuffer);\r | |
1361 | \r | |
1362 | return (BOOLEAN) (Index < EntryCount);\r | |
1363 | }\r | |
1364 | \r |