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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 |
f0f71401 ZG |
38 | // Refer to UEFI Spec 13.3.2 Partition Discovery, the block device\r |
39 | // should be scanned in below order:\r | |
40 | // 1. GPT\r | |
41 | // 2. ISO 9660 (El Torito) (or UDF)\r | |
42 | // 3. MBR\r | |
43 | // 4. no partiton found\r | |
44 | // Note: UDF is using a same method as booting from CD-ROM, so put it along\r | |
45 | // with CD-ROM check.\r | |
ff61847d | 46 | //\r |
adbcbf8f | 47 | PARTITION_DETECT_ROUTINE mPartitionDetectRoutineTable[] = {\r |
48 | PartitionInstallGptChildHandles,\r | |
8aafec2c | 49 | PartitionInstallUdfChildHandles,\r |
f0f71401 | 50 | PartitionInstallMbrChildHandles,\r |
adbcbf8f | 51 | NULL\r |
52 | };\r | |
53 | \r | |
adbcbf8f | 54 | /**\r |
55 | Test to see if this driver supports ControllerHandle. Any ControllerHandle\r | |
490b5ea1 | 56 | than contains a BlockIo and DiskIo protocol or a BlockIo2 protocol can be\r |
57 | supported.\r | |
adbcbf8f | 58 | \r |
490b5ea1 | 59 | @param[in] This Protocol instance pointer.\r |
60 | @param[in] ControllerHandle Handle of device to test.\r | |
61 | @param[in] RemainingDevicePath Optional parameter use to pick a specific child\r | |
62 | device to start.\r | |
adbcbf8f | 63 | \r |
64 | @retval EFI_SUCCESS This driver supports this device\r | |
65 | @retval EFI_ALREADY_STARTED This driver is already running on this device\r | |
66 | @retval other This driver does not support this device\r | |
67 | \r | |
68 | **/\r | |
69 | EFI_STATUS\r | |
70 | EFIAPI\r | |
71 | PartitionDriverBindingSupported (\r | |
72 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
73 | IN EFI_HANDLE ControllerHandle,\r | |
74 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
75 | )\r | |
76 | {\r | |
77 | EFI_STATUS Status;\r | |
78 | EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;\r | |
79 | EFI_DISK_IO_PROTOCOL *DiskIo;\r | |
80 | EFI_DEV_PATH *Node;\r | |
81 | \r | |
9be29006 | 82 | //\r |
83 | // Check RemainingDevicePath validation\r | |
84 | //\r | |
adbcbf8f | 85 | if (RemainingDevicePath != NULL) {\r |
9be29006 | 86 | //\r |
d1102dba | 87 | // Check if RemainingDevicePath is the End of Device Path Node,\r |
9be29006 | 88 | // if yes, go on checking other conditions\r |
89 | //\r | |
90 | if (!IsDevicePathEnd (RemainingDevicePath)) {\r | |
91 | //\r | |
92 | // If RemainingDevicePath isn't the End of Device Path Node,\r | |
93 | // check its validation\r | |
94 | //\r | |
95 | Node = (EFI_DEV_PATH *) RemainingDevicePath;\r | |
96 | if (Node->DevPath.Type != MEDIA_DEVICE_PATH ||\r | |
adbcbf8f | 97 | Node->DevPath.SubType != MEDIA_HARDDRIVE_DP ||\r |
9be29006 | 98 | DevicePathNodeLength (&Node->DevPath) != sizeof (HARDDRIVE_DEVICE_PATH)) {\r |
490b5ea1 | 99 | return EFI_UNSUPPORTED;\r |
9be29006 | 100 | }\r |
adbcbf8f | 101 | }\r |
102 | }\r | |
9be29006 | 103 | \r |
adbcbf8f | 104 | //\r |
105 | // Open the IO Abstraction(s) needed to perform the supported test\r | |
106 | //\r | |
107 | Status = gBS->OpenProtocol (\r | |
108 | ControllerHandle,\r | |
9be29006 | 109 | &gEfiDiskIoProtocolGuid,\r |
110 | (VOID **) &DiskIo,\r | |
adbcbf8f | 111 | This->DriverBindingHandle,\r |
112 | ControllerHandle,\r | |
113 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
114 | );\r | |
115 | if (Status == EFI_ALREADY_STARTED) {\r | |
116 | return EFI_SUCCESS;\r | |
117 | }\r | |
adbcbf8f | 118 | if (EFI_ERROR (Status)) {\r |
119 | return Status;\r | |
120 | }\r | |
121 | //\r | |
122 | // Close the I/O Abstraction(s) used to perform the supported test\r | |
123 | //\r | |
124 | gBS->CloseProtocol (\r | |
ff61847d | 125 | ControllerHandle,\r |
9be29006 | 126 | &gEfiDiskIoProtocolGuid,\r |
ff61847d | 127 | This->DriverBindingHandle,\r |
128 | ControllerHandle\r | |
129 | );\r | |
adbcbf8f | 130 | \r |
131 | //\r | |
9be29006 | 132 | // Open the EFI Device Path protocol needed to perform the supported test\r |
adbcbf8f | 133 | //\r |
134 | Status = gBS->OpenProtocol (\r | |
135 | ControllerHandle,\r | |
9be29006 | 136 | &gEfiDevicePathProtocolGuid,\r |
137 | (VOID **) &ParentDevicePath,\r | |
adbcbf8f | 138 | This->DriverBindingHandle,\r |
139 | ControllerHandle,\r | |
140 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
141 | );\r | |
142 | if (Status == EFI_ALREADY_STARTED) {\r | |
143 | return EFI_SUCCESS;\r | |
144 | }\r | |
145 | \r | |
146 | if (EFI_ERROR (Status)) {\r | |
147 | return Status;\r | |
148 | }\r | |
9be29006 | 149 | \r |
adbcbf8f | 150 | //\r |
9be29006 | 151 | // Close protocol, don't use device path protocol in the Support() function\r |
adbcbf8f | 152 | //\r |
153 | gBS->CloseProtocol (\r | |
154 | ControllerHandle,\r | |
9be29006 | 155 | &gEfiDevicePathProtocolGuid,\r |
adbcbf8f | 156 | This->DriverBindingHandle,\r |
157 | ControllerHandle\r | |
158 | );\r | |
159 | \r | |
160 | //\r | |
161 | // Open the IO Abstraction(s) needed to perform the supported test\r | |
162 | //\r | |
163 | Status = gBS->OpenProtocol (\r | |
164 | ControllerHandle,\r | |
165 | &gEfiBlockIoProtocolGuid,\r | |
166 | NULL,\r | |
167 | This->DriverBindingHandle,\r | |
168 | ControllerHandle,\r | |
169 | EFI_OPEN_PROTOCOL_TEST_PROTOCOL\r | |
170 | );\r | |
21e1018b | 171 | \r |
69c0fbd2 | 172 | return Status;\r |
adbcbf8f | 173 | }\r |
174 | \r | |
adbcbf8f | 175 | /**\r |
490b5ea1 | 176 | Start this driver on ControllerHandle by opening a Block IO or a Block IO2\r |
177 | or both, and Disk IO protocol, reading Device Path, and creating a child\r | |
178 | handle with a Disk IO and device path protocol.\r | |
adbcbf8f | 179 | \r |
490b5ea1 | 180 | @param[in] This Protocol instance pointer.\r |
181 | @param[in] ControllerHandle Handle of device to bind driver to\r | |
182 | @param[in] RemainingDevicePath Optional parameter use to pick a specific child\r | |
183 | device to start.\r | |
adbcbf8f | 184 | \r |
185 | @retval EFI_SUCCESS This driver is added to ControllerHandle\r | |
186 | @retval EFI_ALREADY_STARTED This driver is already running on ControllerHandle\r | |
187 | @retval other This driver does not support this device\r | |
188 | \r | |
189 | **/\r | |
190 | EFI_STATUS\r | |
191 | EFIAPI\r | |
192 | PartitionDriverBindingStart (\r | |
193 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
194 | IN EFI_HANDLE ControllerHandle,\r | |
195 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
196 | )\r | |
197 | {\r | |
198 | EFI_STATUS Status;\r | |
199 | EFI_STATUS OpenStatus;\r | |
200 | EFI_BLOCK_IO_PROTOCOL *BlockIo;\r | |
490b5ea1 | 201 | EFI_BLOCK_IO2_PROTOCOL *BlockIo2;\r |
adbcbf8f | 202 | EFI_DISK_IO_PROTOCOL *DiskIo;\r |
493d8e3a | 203 | EFI_DISK_IO2_PROTOCOL *DiskIo2;\r |
adbcbf8f | 204 | EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;\r |
205 | PARTITION_DETECT_ROUTINE *Routine;\r | |
9afd0514 | 206 | BOOLEAN MediaPresent;\r |
15cc67e6 | 207 | EFI_TPL OldTpl;\r |
adbcbf8f | 208 | \r |
21e1018b | 209 | BlockIo2 = NULL;\r |
d1102dba | 210 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r |
9be29006 | 211 | //\r |
212 | // Check RemainingDevicePath validation\r | |
213 | //\r | |
214 | if (RemainingDevicePath != NULL) {\r | |
215 | //\r | |
d1102dba | 216 | // Check if RemainingDevicePath is the End of Device Path Node,\r |
9be29006 | 217 | // if yes, return EFI_SUCCESS\r |
218 | //\r | |
219 | if (IsDevicePathEnd (RemainingDevicePath)) {\r | |
15cc67e6 | 220 | Status = EFI_SUCCESS;\r |
221 | goto Exit;\r | |
9be29006 | 222 | }\r |
223 | }\r | |
224 | \r | |
490b5ea1 | 225 | //\r |
226 | // Try to open BlockIO and BlockIO2. If BlockIO would be opened, continue,\r | |
227 | // otherwise, return error.\r | |
228 | //\r | |
adbcbf8f | 229 | Status = gBS->OpenProtocol (\r |
230 | ControllerHandle,\r | |
231 | &gEfiBlockIoProtocolGuid,\r | |
232 | (VOID **) &BlockIo,\r | |
233 | This->DriverBindingHandle,\r | |
234 | ControllerHandle,\r | |
235 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
236 | );\r | |
237 | if (EFI_ERROR (Status)) {\r | |
15cc67e6 | 238 | goto Exit;\r |
adbcbf8f | 239 | }\r |
490b5ea1 | 240 | \r |
241 | Status = gBS->OpenProtocol (\r | |
242 | ControllerHandle,\r | |
243 | &gEfiBlockIo2ProtocolGuid,\r | |
244 | (VOID **) &BlockIo2,\r | |
245 | This->DriverBindingHandle,\r | |
246 | ControllerHandle,\r | |
493d8e3a | 247 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r |
490b5ea1 | 248 | );\r |
493d8e3a RN |
249 | if (EFI_ERROR (Status)) {\r |
250 | BlockIo2 = NULL;\r | |
251 | }\r | |
490b5ea1 | 252 | \r |
adbcbf8f | 253 | //\r |
490b5ea1 | 254 | // Get the Device Path Protocol on ControllerHandle's handle.\r |
adbcbf8f | 255 | //\r |
256 | Status = gBS->OpenProtocol (\r | |
257 | ControllerHandle,\r | |
258 | &gEfiDevicePathProtocolGuid,\r | |
259 | (VOID **) &ParentDevicePath,\r | |
260 | This->DriverBindingHandle,\r | |
261 | ControllerHandle,\r | |
262 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
263 | );\r | |
264 | if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {\r | |
15cc67e6 | 265 | goto Exit;\r |
adbcbf8f | 266 | }\r |
267 | \r | |
493d8e3a RN |
268 | //\r |
269 | // Get the DiskIo and DiskIo2.\r | |
270 | //\r | |
adbcbf8f | 271 | Status = gBS->OpenProtocol (\r |
272 | ControllerHandle,\r | |
273 | &gEfiDiskIoProtocolGuid,\r | |
274 | (VOID **) &DiskIo,\r | |
275 | This->DriverBindingHandle,\r | |
276 | ControllerHandle,\r | |
277 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
278 | );\r | |
279 | if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {\r | |
280 | gBS->CloseProtocol (\r | |
281 | ControllerHandle,\r | |
282 | &gEfiDevicePathProtocolGuid,\r | |
283 | This->DriverBindingHandle,\r | |
284 | ControllerHandle\r | |
285 | );\r | |
15cc67e6 | 286 | goto Exit;\r |
adbcbf8f | 287 | }\r |
288 | \r | |
289 | OpenStatus = Status;\r | |
290 | \r | |
493d8e3a RN |
291 | Status = gBS->OpenProtocol (\r |
292 | ControllerHandle,\r | |
293 | &gEfiDiskIo2ProtocolGuid,\r | |
294 | (VOID **) &DiskIo2,\r | |
295 | This->DriverBindingHandle,\r | |
296 | ControllerHandle,\r | |
297 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
298 | );\r | |
299 | if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {\r | |
300 | DiskIo2 = NULL;\r | |
301 | }\r | |
302 | \r | |
adbcbf8f | 303 | //\r |
9afd0514 | 304 | // Try to read blocks when there's media or it is removable physical partition.\r |
adbcbf8f | 305 | //\r |
9afd0514 | 306 | Status = EFI_UNSUPPORTED;\r |
307 | MediaPresent = BlockIo->Media->MediaPresent;\r | |
308 | if (BlockIo->Media->MediaPresent ||\r | |
309 | (BlockIo->Media->RemovableMedia && !BlockIo->Media->LogicalPartition)) {\r | |
adbcbf8f | 310 | //\r |
01a68fd3 HW |
311 | // Try for GPT, then legacy MBR partition types, and then UDF and El Torito.\r |
312 | // If the media supports a given partition type install child handles to\r | |
313 | // represent the partitions described by the media.\r | |
adbcbf8f | 314 | //\r |
315 | Routine = &mPartitionDetectRoutineTable[0];\r | |
316 | while (*Routine != NULL) {\r | |
317 | Status = (*Routine) (\r | |
318 | This,\r | |
319 | ControllerHandle,\r | |
320 | DiskIo,\r | |
493d8e3a | 321 | DiskIo2,\r |
adbcbf8f | 322 | BlockIo,\r |
490b5ea1 | 323 | BlockIo2,\r |
adbcbf8f | 324 | ParentDevicePath\r |
325 | );\r | |
9afd0514 | 326 | if (!EFI_ERROR (Status) || Status == EFI_MEDIA_CHANGED || Status == EFI_NO_MEDIA) {\r |
adbcbf8f | 327 | break;\r |
328 | }\r | |
329 | Routine++;\r | |
330 | }\r | |
331 | }\r | |
332 | //\r | |
333 | // In the case that the driver is already started (OpenStatus == EFI_ALREADY_STARTED),\r | |
334 | // the DevicePathProtocol and the DiskIoProtocol are not actually opened by the\r | |
335 | // driver. So don't try to close them. Otherwise, we will break the dependency\r | |
336 | // between the controller and the driver set up before.\r | |
337 | //\r | |
d1102dba | 338 | // In the case that when the media changes on a device it will Reinstall the\r |
9afd0514 | 339 | // BlockIo interaface. This will cause a call to our Stop(), and a subsequent\r |
340 | // reentrant call to our Start() successfully. We should leave the device open\r | |
341 | // when this happen. The "media change" case includes either the status is\r | |
d1102dba LG |
342 | // EFI_MEDIA_CHANGED or it is a "media" to "no media" change.\r |
343 | //\r | |
9afd0514 | 344 | if (EFI_ERROR (Status) &&\r |
345 | !EFI_ERROR (OpenStatus) &&\r | |
346 | Status != EFI_MEDIA_CHANGED &&\r | |
347 | !(MediaPresent && Status == EFI_NO_MEDIA)) {\r | |
adbcbf8f | 348 | gBS->CloseProtocol (\r |
349 | ControllerHandle,\r | |
350 | &gEfiDiskIoProtocolGuid,\r | |
351 | This->DriverBindingHandle,\r | |
352 | ControllerHandle\r | |
353 | );\r | |
490b5ea1 | 354 | //\r |
80c83a69 | 355 | // Close Parent DiskIo2 if has.\r |
d1102dba | 356 | //\r |
490b5ea1 | 357 | gBS->CloseProtocol (\r |
358 | ControllerHandle,\r | |
80c83a69 | 359 | &gEfiDiskIo2ProtocolGuid,\r |
490b5ea1 | 360 | This->DriverBindingHandle,\r |
361 | ControllerHandle\r | |
362 | );\r | |
adbcbf8f | 363 | \r |
364 | gBS->CloseProtocol (\r | |
365 | ControllerHandle,\r | |
366 | &gEfiDevicePathProtocolGuid,\r | |
367 | This->DriverBindingHandle,\r | |
368 | ControllerHandle\r | |
369 | );\r | |
370 | }\r | |
371 | \r | |
15cc67e6 | 372 | Exit:\r |
373 | gBS->RestoreTPL (OldTpl);\r | |
adbcbf8f | 374 | return Status;\r |
375 | }\r | |
376 | \r | |
adbcbf8f | 377 | /**\r |
48557c65 | 378 | Stop this driver on ControllerHandle. Support stopping any child handles\r |
adbcbf8f | 379 | created by this driver.\r |
380 | \r | |
381 | @param This Protocol instance pointer.\r | |
382 | @param ControllerHandle Handle of device to stop driver on\r | |
383 | @param NumberOfChildren Number of Handles in ChildHandleBuffer. If number of\r | |
384 | children is zero stop the entire bus driver.\r | |
385 | @param ChildHandleBuffer List of Child Handles to Stop.\r | |
386 | \r | |
387 | @retval EFI_SUCCESS This driver is removed ControllerHandle\r | |
388 | @retval other This driver was not removed from this device\r | |
389 | \r | |
390 | **/\r | |
391 | EFI_STATUS\r | |
392 | EFIAPI\r | |
393 | PartitionDriverBindingStop (\r | |
394 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
395 | IN EFI_HANDLE ControllerHandle,\r | |
396 | IN UINTN NumberOfChildren,\r | |
397 | IN EFI_HANDLE *ChildHandleBuffer\r | |
398 | )\r | |
399 | {\r | |
400 | EFI_STATUS Status;\r | |
401 | UINTN Index;\r | |
402 | EFI_BLOCK_IO_PROTOCOL *BlockIo;\r | |
490b5ea1 | 403 | EFI_BLOCK_IO2_PROTOCOL *BlockIo2;\r |
adbcbf8f | 404 | BOOLEAN AllChildrenStopped;\r |
405 | PARTITION_PRIVATE_DATA *Private;\r | |
406 | EFI_DISK_IO_PROTOCOL *DiskIo;\r | |
709c9fd5 | 407 | EFI_GUID *TypeGuid;\r |
adbcbf8f | 408 | \r |
490b5ea1 | 409 | BlockIo = NULL;\r |
410 | BlockIo2 = NULL;\r | |
411 | Private = NULL;\r | |
412 | \r | |
adbcbf8f | 413 | if (NumberOfChildren == 0) {\r |
e3325721 HW |
414 | //\r |
415 | // In the case of re-entry of the PartitionDriverBindingStop, the\r | |
416 | // NumberOfChildren may not reflect the actual number of children on the\r | |
417 | // bus driver. Hence, additional check is needed here.\r | |
418 | //\r | |
419 | if (HasChildren (ControllerHandle)) {\r | |
420 | DEBUG((EFI_D_ERROR, "PartitionDriverBindingStop: Still has child.\n"));\r | |
421 | return EFI_DEVICE_ERROR;\r | |
422 | }\r | |
423 | \r | |
adbcbf8f | 424 | //\r |
425 | // Close the bus driver\r | |
426 | //\r | |
427 | gBS->CloseProtocol (\r | |
428 | ControllerHandle,\r | |
429 | &gEfiDiskIoProtocolGuid,\r | |
430 | This->DriverBindingHandle,\r | |
431 | ControllerHandle\r | |
432 | );\r | |
490b5ea1 | 433 | //\r |
434 | // Close Parent BlockIO2 if has.\r | |
d1102dba | 435 | //\r |
490b5ea1 | 436 | gBS->CloseProtocol (\r |
437 | ControllerHandle,\r | |
493d8e3a | 438 | &gEfiDiskIo2ProtocolGuid,\r |
490b5ea1 | 439 | This->DriverBindingHandle,\r |
440 | ControllerHandle\r | |
441 | );\r | |
adbcbf8f | 442 | \r |
443 | gBS->CloseProtocol (\r | |
444 | ControllerHandle,\r | |
445 | &gEfiDevicePathProtocolGuid,\r | |
446 | This->DriverBindingHandle,\r | |
447 | ControllerHandle\r | |
448 | );\r | |
adbcbf8f | 449 | return EFI_SUCCESS;\r |
450 | }\r | |
451 | \r | |
452 | AllChildrenStopped = TRUE;\r | |
453 | for (Index = 0; Index < NumberOfChildren; Index++) {\r | |
490b5ea1 | 454 | gBS->OpenProtocol (\r |
455 | ChildHandleBuffer[Index],\r | |
456 | &gEfiBlockIoProtocolGuid,\r | |
457 | (VOID **) &BlockIo,\r | |
458 | This->DriverBindingHandle,\r | |
459 | ControllerHandle,\r | |
460 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
461 | );\r | |
462 | //\r | |
463 | // Try to locate BlockIo2.\r | |
464 | //\r | |
465 | gBS->OpenProtocol (\r | |
466 | ChildHandleBuffer[Index],\r | |
467 | &gEfiBlockIo2ProtocolGuid,\r | |
468 | (VOID **) &BlockIo2,\r | |
469 | This->DriverBindingHandle,\r | |
470 | ControllerHandle,\r | |
471 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
d1102dba | 472 | );\r |
490b5ea1 | 473 | \r |
d0844d13 | 474 | \r |
475 | Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (BlockIo);\r | |
e3325721 HW |
476 | if (Private->InStop) {\r |
477 | //\r | |
478 | // If the child handle is going to be stopped again during the re-entry\r | |
479 | // of DriverBindingStop, just do nothing.\r | |
480 | //\r | |
481 | break;\r | |
482 | }\r | |
483 | Private->InStop = TRUE;\r | |
adbcbf8f | 484 | \r |
e3325721 HW |
485 | BlockIo->FlushBlocks (BlockIo);\r |
486 | \r | |
487 | if (BlockIo2 != NULL) {\r | |
488 | Status = BlockIo2->FlushBlocksEx (BlockIo2, NULL);\r | |
489 | DEBUG((EFI_D_ERROR, "PartitionDriverBindingStop: FlushBlocksEx returned with %r\n", Status));\r | |
490 | } else {\r | |
491 | Status = EFI_SUCCESS;\r | |
492 | }\r | |
493 | \r | |
494 | gBS->CloseProtocol (\r | |
495 | ControllerHandle,\r | |
496 | &gEfiDiskIoProtocolGuid,\r | |
497 | This->DriverBindingHandle,\r | |
498 | ChildHandleBuffer[Index]\r | |
499 | );\r | |
709c9fd5 JB |
500 | \r |
501 | if (IsZeroGuid (&Private->TypeGuid)) {\r | |
502 | TypeGuid = NULL;\r | |
503 | } else {\r | |
504 | TypeGuid = &Private->TypeGuid;\r | |
505 | }\r | |
506 | \r | |
490b5ea1 | 507 | //\r |
508 | // All Software protocols have be freed from the handle so remove it.\r | |
509 | // Remove the BlockIo Protocol if has.\r | |
510 | // Remove the BlockIo2 Protocol if has.\r | |
511 | //\r | |
512 | if (BlockIo2 != NULL) {\r | |
e3325721 HW |
513 | //\r |
514 | // Some device drivers might re-install the BlockIO(2) protocols for a\r | |
515 | // media change condition. Therefore, if the FlushBlocksEx returned with\r | |
516 | // EFI_MEDIA_CHANGED, just let the BindingStop fail to avoid potential\r | |
517 | // reference of already stopped child handle.\r | |
518 | //\r | |
519 | if (Status != EFI_MEDIA_CHANGED) {\r | |
520 | Status = gBS->UninstallMultipleProtocolInterfaces (\r | |
521 | ChildHandleBuffer[Index],\r | |
522 | &gEfiDevicePathProtocolGuid,\r | |
523 | Private->DevicePath,\r | |
524 | &gEfiBlockIoProtocolGuid,\r | |
525 | &Private->BlockIo,\r | |
526 | &gEfiBlockIo2ProtocolGuid,\r | |
527 | &Private->BlockIo2,\r | |
3a3d62d2 HW |
528 | &gEfiPartitionInfoProtocolGuid,\r |
529 | &Private->PartitionInfo,\r | |
709c9fd5 | 530 | TypeGuid,\r |
e3325721 HW |
531 | NULL,\r |
532 | NULL\r | |
533 | );\r | |
534 | }\r | |
490b5ea1 | 535 | } else {\r |
490b5ea1 | 536 | Status = gBS->UninstallMultipleProtocolInterfaces (\r |
537 | ChildHandleBuffer[Index],\r | |
538 | &gEfiDevicePathProtocolGuid,\r | |
539 | Private->DevicePath,\r | |
540 | &gEfiBlockIoProtocolGuid,\r | |
541 | &Private->BlockIo,\r | |
3a3d62d2 HW |
542 | &gEfiPartitionInfoProtocolGuid,\r |
543 | &Private->PartitionInfo,\r | |
709c9fd5 | 544 | TypeGuid,\r |
490b5ea1 | 545 | NULL,\r |
546 | NULL\r | |
547 | );\r | |
548 | }\r | |
adbcbf8f | 549 | \r |
490b5ea1 | 550 | if (EFI_ERROR (Status)) {\r |
e3325721 | 551 | Private->InStop = FALSE;\r |
490b5ea1 | 552 | gBS->OpenProtocol (\r |
553 | ControllerHandle,\r | |
554 | &gEfiDiskIoProtocolGuid,\r | |
555 | (VOID **) &DiskIo,\r | |
556 | This->DriverBindingHandle,\r | |
557 | ChildHandleBuffer[Index],\r | |
558 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r | |
559 | );\r | |
560 | } else {\r | |
561 | FreePool (Private->DevicePath);\r | |
562 | FreePool (Private);\r | |
adbcbf8f | 563 | }\r |
564 | \r | |
565 | if (EFI_ERROR (Status)) {\r | |
566 | AllChildrenStopped = FALSE;\r | |
e3325721 HW |
567 | if (Status == EFI_MEDIA_CHANGED) {\r |
568 | break;\r | |
569 | }\r | |
adbcbf8f | 570 | }\r |
571 | }\r | |
572 | \r | |
573 | if (!AllChildrenStopped) {\r | |
574 | return EFI_DEVICE_ERROR;\r | |
575 | }\r | |
576 | \r | |
577 | return EFI_SUCCESS;\r | |
578 | }\r | |
579 | \r | |
580 | \r | |
581 | /**\r | |
582 | Reset the Block Device.\r | |
583 | \r | |
584 | @param This Protocol instance pointer.\r | |
585 | @param ExtendedVerification Driver may perform diagnostics on reset.\r | |
586 | \r | |
587 | @retval EFI_SUCCESS The device was reset.\r | |
588 | @retval EFI_DEVICE_ERROR The device is not functioning properly and could\r | |
589 | not be reset.\r | |
590 | \r | |
591 | **/\r | |
adbcbf8f | 592 | EFI_STATUS\r |
593 | EFIAPI\r | |
594 | PartitionReset (\r | |
595 | IN EFI_BLOCK_IO_PROTOCOL *This,\r | |
596 | IN BOOLEAN ExtendedVerification\r | |
597 | )\r | |
598 | {\r | |
599 | PARTITION_PRIVATE_DATA *Private;\r | |
600 | \r | |
601 | Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (This);\r | |
602 | \r | |
603 | return Private->ParentBlockIo->Reset (\r | |
604 | Private->ParentBlockIo,\r | |
605 | ExtendedVerification\r | |
606 | );\r | |
607 | }\r | |
608 | \r | |
fcf5e49d RN |
609 | /**\r |
610 | Probe the media status and return EFI_NO_MEDIA or EFI_MEDIA_CHANGED\r | |
611 | for no media or media change case. Otherwise DefaultStatus is returned.\r | |
612 | \r | |
613 | @param DiskIo Pointer to the DiskIo instance.\r | |
614 | @param MediaId Id of the media, changes every time the media is replaced.\r | |
615 | @param DefaultStatus The default status to return when it's not the no media\r | |
616 | or media change case.\r | |
617 | \r | |
618 | @retval EFI_NO_MEDIA There is no media.\r | |
619 | @retval EFI_MEDIA_CHANGED The media was changed.\r | |
620 | @retval others The default status to return.\r | |
621 | **/\r | |
622 | EFI_STATUS\r | |
623 | ProbeMediaStatus (\r | |
624 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
625 | IN UINT32 MediaId,\r | |
626 | IN EFI_STATUS DefaultStatus\r | |
627 | )\r | |
628 | {\r | |
629 | EFI_STATUS Status;\r | |
df473cc1 | 630 | UINT8 Buffer[1];\r |
fcf5e49d RN |
631 | \r |
632 | //\r | |
df473cc1 RC |
633 | // Read 1 byte from offset 0 to check if the MediaId is still valid.\r |
634 | // The reading operation is synchronious thus it is not worth it to\r | |
635 | // allocate a buffer from the pool. The destination buffer for the\r | |
636 | // data is in the stack.\r | |
fcf5e49d | 637 | //\r |
df473cc1 | 638 | Status = DiskIo->ReadDisk (DiskIo, MediaId, 0, 1, (VOID*)Buffer);\r |
fcf5e49d RN |
639 | if ((Status == EFI_NO_MEDIA) || (Status == EFI_MEDIA_CHANGED)) {\r |
640 | return Status;\r | |
641 | }\r | |
642 | return DefaultStatus;\r | |
643 | }\r | |
adbcbf8f | 644 | \r |
645 | /**\r | |
646 | Read by using the Disk IO protocol on the parent device. Lba addresses\r | |
647 | must be converted to byte offsets.\r | |
648 | \r | |
649 | @param This Protocol instance pointer.\r | |
650 | @param MediaId Id of the media, changes every time the media is replaced.\r | |
651 | @param Lba The starting Logical Block Address to read from\r | |
652 | @param BufferSize Size of Buffer, must be a multiple of device block size.\r | |
653 | @param Buffer Buffer containing read data\r | |
654 | \r | |
655 | @retval EFI_SUCCESS The data was read correctly from the device.\r | |
656 | @retval EFI_DEVICE_ERROR The device reported an error while performing the read.\r | |
657 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
658 | @retval EFI_MEDIA_CHANGED The MediaId does not matched the current device.\r | |
659 | @retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.\r | |
660 | @retval EFI_INVALID_PARAMETER The read request contains device addresses that are not\r | |
661 | valid for the device.\r | |
662 | \r | |
663 | **/\r | |
adbcbf8f | 664 | EFI_STATUS\r |
665 | EFIAPI\r | |
666 | PartitionReadBlocks (\r | |
667 | IN EFI_BLOCK_IO_PROTOCOL *This,\r | |
668 | IN UINT32 MediaId,\r | |
669 | IN EFI_LBA Lba,\r | |
670 | IN UINTN BufferSize,\r | |
671 | OUT VOID *Buffer\r | |
672 | )\r | |
673 | {\r | |
674 | PARTITION_PRIVATE_DATA *Private;\r | |
675 | UINT64 Offset;\r | |
676 | \r | |
677 | Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (This);\r | |
678 | \r | |
679 | if (BufferSize % Private->BlockSize != 0) {\r | |
fcf5e49d | 680 | return ProbeMediaStatus (Private->DiskIo, MediaId, EFI_BAD_BUFFER_SIZE);\r |
adbcbf8f | 681 | }\r |
682 | \r | |
683 | Offset = MultU64x32 (Lba, Private->BlockSize) + Private->Start;\r | |
684 | if (Offset + BufferSize > Private->End) {\r | |
fcf5e49d | 685 | return ProbeMediaStatus (Private->DiskIo, MediaId, EFI_INVALID_PARAMETER);\r |
adbcbf8f | 686 | }\r |
687 | //\r | |
688 | // Because some kinds of partition have different block size from their parent\r | |
689 | // device, we call the Disk IO protocol on the parent device, not the Block IO\r | |
690 | // protocol\r | |
691 | //\r | |
692 | return Private->DiskIo->ReadDisk (Private->DiskIo, MediaId, Offset, BufferSize, Buffer);\r | |
693 | }\r | |
694 | \r | |
695 | /**\r | |
696 | Write by using the Disk IO protocol on the parent device. Lba addresses\r | |
697 | must be converted to byte offsets.\r | |
698 | \r | |
490b5ea1 | 699 | @param[in] This Protocol instance pointer.\r |
700 | @param[in] MediaId Id of the media, changes every time the media is replaced.\r | |
701 | @param[in] Lba The starting Logical Block Address to read from\r | |
702 | @param[in] BufferSize Size of Buffer, must be a multiple of device block size.\r | |
703 | @param[in] Buffer Buffer containing data to be written to device.\r | |
adbcbf8f | 704 | \r |
705 | @retval EFI_SUCCESS The data was written correctly to the device.\r | |
706 | @retval EFI_WRITE_PROTECTED The device can not be written to.\r | |
707 | @retval EFI_DEVICE_ERROR The device reported an error while performing the write.\r | |
708 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
709 | @retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device.\r | |
710 | @retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.\r | |
711 | @retval EFI_INVALID_PARAMETER The write request contains a LBA that is not\r | |
712 | valid for the device.\r | |
713 | \r | |
714 | **/\r | |
adbcbf8f | 715 | EFI_STATUS\r |
716 | EFIAPI\r | |
717 | PartitionWriteBlocks (\r | |
718 | IN EFI_BLOCK_IO_PROTOCOL *This,\r | |
719 | IN UINT32 MediaId,\r | |
720 | IN EFI_LBA Lba,\r | |
721 | IN UINTN BufferSize,\r | |
490b5ea1 | 722 | IN VOID *Buffer\r |
adbcbf8f | 723 | )\r |
724 | {\r | |
725 | PARTITION_PRIVATE_DATA *Private;\r | |
726 | UINT64 Offset;\r | |
727 | \r | |
728 | Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (This);\r | |
729 | \r | |
730 | if (BufferSize % Private->BlockSize != 0) {\r | |
fcf5e49d | 731 | return ProbeMediaStatus (Private->DiskIo, MediaId, EFI_BAD_BUFFER_SIZE);\r |
adbcbf8f | 732 | }\r |
733 | \r | |
734 | Offset = MultU64x32 (Lba, Private->BlockSize) + Private->Start;\r | |
735 | if (Offset + BufferSize > Private->End) {\r | |
fcf5e49d | 736 | return ProbeMediaStatus (Private->DiskIo, MediaId, EFI_INVALID_PARAMETER);\r |
adbcbf8f | 737 | }\r |
738 | //\r | |
739 | // Because some kinds of partition have different block size from their parent\r | |
740 | // device, we call the Disk IO protocol on the parent device, not the Block IO\r | |
741 | // protocol\r | |
742 | //\r | |
743 | return Private->DiskIo->WriteDisk (Private->DiskIo, MediaId, Offset, BufferSize, Buffer);\r | |
744 | }\r | |
745 | \r | |
746 | \r | |
747 | /**\r | |
748 | Flush the parent Block Device.\r | |
749 | \r | |
750 | @param This Protocol instance pointer.\r | |
751 | \r | |
752 | @retval EFI_SUCCESS All outstanding data was written to the device\r | |
753 | @retval EFI_DEVICE_ERROR The device reported an error while writting back the data\r | |
754 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
755 | \r | |
756 | **/\r | |
adbcbf8f | 757 | EFI_STATUS\r |
758 | EFIAPI\r | |
759 | PartitionFlushBlocks (\r | |
760 | IN EFI_BLOCK_IO_PROTOCOL *This\r | |
761 | )\r | |
762 | {\r | |
763 | PARTITION_PRIVATE_DATA *Private;\r | |
764 | \r | |
765 | Private = PARTITION_DEVICE_FROM_BLOCK_IO_THIS (This);\r | |
766 | \r | |
767 | return Private->ParentBlockIo->FlushBlocks (Private->ParentBlockIo);\r | |
768 | }\r | |
769 | \r | |
65fd3952 RN |
770 | /**\r |
771 | Probe the media status and return EFI_NO_MEDIA or EFI_MEDIA_CHANGED\r | |
772 | for no media or media change case. Otherwise DefaultStatus is returned.\r | |
773 | \r | |
493d8e3a | 774 | @param DiskIo2 Pointer to the DiskIo2 instance.\r |
65fd3952 RN |
775 | @param MediaId Id of the media, changes every time the media is replaced.\r |
776 | @param DefaultStatus The default status to return when it's not the no media\r | |
777 | or media change case.\r | |
778 | \r | |
779 | @retval EFI_NO_MEDIA There is no media.\r | |
780 | @retval EFI_MEDIA_CHANGED The media was changed.\r | |
781 | @retval others The default status to return.\r | |
782 | **/\r | |
783 | EFI_STATUS\r | |
784 | ProbeMediaStatusEx (\r | |
493d8e3a | 785 | IN EFI_DISK_IO2_PROTOCOL *DiskIo2,\r |
65fd3952 RN |
786 | IN UINT32 MediaId,\r |
787 | IN EFI_STATUS DefaultStatus\r | |
788 | )\r | |
789 | {\r | |
790 | EFI_STATUS Status;\r | |
68599525 | 791 | UINT8 Buffer[1];\r |
65fd3952 RN |
792 | \r |
793 | //\r | |
68599525 RN |
794 | // Read 1 byte from offset 0 to check if the MediaId is still valid.\r |
795 | // The reading operation is synchronious thus it is not worth it to\r | |
796 | // allocate a buffer from the pool. The destination buffer for the\r | |
797 | // data is in the stack.\r | |
65fd3952 | 798 | //\r |
68599525 | 799 | Status = DiskIo2->ReadDiskEx (DiskIo2, MediaId, 0, NULL, 1, (VOID*)Buffer);\r |
65fd3952 RN |
800 | if ((Status == EFI_NO_MEDIA) || (Status == EFI_MEDIA_CHANGED)) {\r |
801 | return Status;\r | |
802 | }\r | |
803 | return DefaultStatus;\r | |
804 | }\r | |
805 | \r | |
490b5ea1 | 806 | /**\r |
807 | Reset the Block Device throught Block I/O2 protocol.\r | |
808 | \r | |
809 | @param This Protocol instance pointer.\r | |
810 | @param ExtendedVerification Driver may perform diagnostics on reset.\r | |
811 | \r | |
812 | @retval EFI_SUCCESS The device was reset.\r | |
813 | @retval EFI_DEVICE_ERROR The device is not functioning properly and could\r | |
814 | not be reset.\r | |
815 | \r | |
816 | **/\r | |
817 | EFI_STATUS\r | |
818 | EFIAPI\r | |
819 | PartitionResetEx (\r | |
820 | IN EFI_BLOCK_IO2_PROTOCOL *This,\r | |
821 | IN BOOLEAN ExtendedVerification\r | |
822 | )\r | |
823 | {\r | |
824 | PARTITION_PRIVATE_DATA *Private;\r | |
825 | \r | |
826 | Private = PARTITION_DEVICE_FROM_BLOCK_IO2_THIS (This);\r | |
827 | \r | |
828 | return Private->ParentBlockIo2->Reset (\r | |
829 | Private->ParentBlockIo2,\r | |
830 | ExtendedVerification\r | |
831 | );\r | |
832 | }\r | |
833 | \r | |
493d8e3a RN |
834 | /**\r |
835 | The general callback for the DiskIo2 interfaces.\r | |
836 | @param Event Event whose notification function is being invoked.\r | |
837 | @param Context The pointer to the notification function's context,\r | |
838 | which points to the PARTITION_ACCESS_TASK instance.\r | |
839 | **/\r | |
840 | VOID\r | |
841 | EFIAPI\r | |
842 | PartitionOnAccessComplete (\r | |
843 | IN EFI_EVENT Event,\r | |
844 | IN VOID *Context\r | |
845 | )\r | |
846 | {\r | |
847 | PARTITION_ACCESS_TASK *Task;\r | |
848 | \r | |
849 | Task = (PARTITION_ACCESS_TASK *) Context;\r | |
850 | \r | |
851 | gBS->CloseEvent (Event);\r | |
852 | \r | |
853 | Task->BlockIo2Token->TransactionStatus = Task->DiskIo2Token.TransactionStatus;\r | |
854 | gBS->SignalEvent (Task->BlockIo2Token->Event);\r | |
855 | \r | |
856 | FreePool (Task);\r | |
857 | }\r | |
858 | \r | |
859 | /**\r | |
860 | Create a new PARTITION_ACCESS_TASK instance.\r | |
861 | \r | |
862 | @param Token Pointer to the EFI_BLOCK_IO2_TOKEN.\r | |
863 | \r | |
864 | @return Pointer to the created PARTITION_ACCESS_TASK instance or NULL upon failure.\r | |
865 | **/\r | |
866 | PARTITION_ACCESS_TASK *\r | |
867 | PartitionCreateAccessTask (\r | |
868 | IN EFI_BLOCK_IO2_TOKEN *Token\r | |
869 | )\r | |
870 | {\r | |
871 | EFI_STATUS Status;\r | |
872 | PARTITION_ACCESS_TASK *Task;\r | |
873 | \r | |
874 | Task = AllocatePool (sizeof (*Task));\r | |
875 | if (Task == NULL) {\r | |
876 | return NULL;\r | |
877 | }\r | |
878 | \r | |
879 | Status = gBS->CreateEvent (\r | |
880 | EVT_NOTIFY_SIGNAL,\r | |
80c83a69 | 881 | TPL_NOTIFY,\r |
493d8e3a RN |
882 | PartitionOnAccessComplete,\r |
883 | Task,\r | |
884 | &Task->DiskIo2Token.Event\r | |
885 | );\r | |
886 | if (EFI_ERROR (Status)) {\r | |
887 | FreePool (Task);\r | |
888 | return NULL;\r | |
889 | }\r | |
890 | \r | |
891 | Task->BlockIo2Token = Token;\r | |
892 | \r | |
893 | return Task;\r | |
894 | }\r | |
895 | \r | |
490b5ea1 | 896 | /**\r |
897 | Read BufferSize bytes from Lba into Buffer.\r | |
d1102dba | 898 | \r |
490b5ea1 | 899 | This function reads the requested number of blocks from the device. All the\r |
900 | blocks are read, or an error is returned.\r | |
901 | If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_or EFI_MEDIA_CHANGED is returned and\r | |
902 | non-blocking I/O is being used, the Event associated with this request will\r | |
903 | not be signaled.\r | |
904 | \r | |
905 | @param[in] This Indicates a pointer to the calling context.\r | |
d1102dba | 906 | @param[in] MediaId Id of the media, changes every time the media is\r |
490b5ea1 | 907 | replaced.\r |
908 | @param[in] Lba The starting Logical Block Address to read from.\r | |
d1102dba LG |
909 | @param[in, out] Token A pointer to the token associated with the transaction.\r |
910 | @param[in] BufferSize Size of Buffer, must be a multiple of device block size.\r | |
911 | @param[out] Buffer A pointer to the destination buffer for the data. The\r | |
912 | caller is responsible for either having implicit or\r | |
490b5ea1 | 913 | explicit ownership of the buffer.\r |
914 | \r | |
915 | @retval EFI_SUCCESS The read request was queued if Token->Event is\r | |
916 | not NULL.The data was read correctly from the\r | |
917 | device if the Token->Event is NULL.\r | |
918 | @retval EFI_DEVICE_ERROR The device reported an error while performing\r | |
919 | the read.\r | |
920 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
921 | @retval EFI_MEDIA_CHANGED The MediaId is not for the current media.\r | |
922 | @retval EFI_BAD_BUFFER_SIZE The BufferSize parameter is not a multiple of the\r | |
923 | intrinsic block size of the device.\r | |
d1102dba | 924 | @retval EFI_INVALID_PARAMETER The read request contains LBAs that are not valid,\r |
490b5ea1 | 925 | or the buffer is not on proper alignment.\r |
926 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack\r | |
927 | of resources.\r | |
928 | **/\r | |
929 | EFI_STATUS\r | |
930 | EFIAPI\r | |
931 | PartitionReadBlocksEx (\r | |
932 | IN EFI_BLOCK_IO2_PROTOCOL *This,\r | |
933 | IN UINT32 MediaId,\r | |
934 | IN EFI_LBA Lba,\r | |
935 | IN OUT EFI_BLOCK_IO2_TOKEN *Token,\r | |
936 | IN UINTN BufferSize,\r | |
937 | OUT VOID *Buffer\r | |
938 | )\r | |
939 | {\r | |
493d8e3a | 940 | EFI_STATUS Status;\r |
490b5ea1 | 941 | PARTITION_PRIVATE_DATA *Private;\r |
942 | UINT64 Offset;\r | |
493d8e3a | 943 | PARTITION_ACCESS_TASK *Task;\r |
490b5ea1 | 944 | \r |
65fd3952 RN |
945 | Private = PARTITION_DEVICE_FROM_BLOCK_IO2_THIS (This);\r |
946 | \r | |
490b5ea1 | 947 | if (BufferSize % Private->BlockSize != 0) {\r |
493d8e3a | 948 | return ProbeMediaStatusEx (Private->DiskIo2, MediaId, EFI_BAD_BUFFER_SIZE);\r |
490b5ea1 | 949 | }\r |
950 | \r | |
951 | Offset = MultU64x32 (Lba, Private->BlockSize) + Private->Start;\r | |
952 | if (Offset + BufferSize > Private->End) {\r | |
493d8e3a | 953 | return ProbeMediaStatusEx (Private->DiskIo2, MediaId, EFI_INVALID_PARAMETER);\r |
490b5ea1 | 954 | }\r |
955 | \r | |
493d8e3a RN |
956 | if ((Token != NULL) && (Token->Event != NULL)) {\r |
957 | Task = PartitionCreateAccessTask (Token);\r | |
958 | if (Task == NULL) {\r | |
959 | return EFI_OUT_OF_RESOURCES;\r | |
960 | }\r | |
490b5ea1 | 961 | \r |
493d8e3a RN |
962 | Status = Private->DiskIo2->ReadDiskEx (Private->DiskIo2, MediaId, Offset, &Task->DiskIo2Token, BufferSize, Buffer);\r |
963 | if (EFI_ERROR (Status)) {\r | |
964 | gBS->CloseEvent (Task->DiskIo2Token.Event);\r | |
965 | FreePool (Task);\r | |
966 | }\r | |
967 | } else {\r | |
968 | Status = Private->DiskIo2->ReadDiskEx (Private->DiskIo2, MediaId, Offset, NULL, BufferSize, Buffer);\r | |
490b5ea1 | 969 | }\r |
970 | \r | |
493d8e3a | 971 | return Status;\r |
490b5ea1 | 972 | }\r |
973 | \r | |
974 | /**\r | |
975 | Write BufferSize bytes from Lba into Buffer.\r | |
976 | \r | |
977 | This function writes the requested number of blocks to the device. All blocks\r | |
978 | are written, or an error is returned.If EFI_DEVICE_ERROR, EFI_NO_MEDIA,\r | |
979 | EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED is returned and non-blocking I/O is\r | |
980 | being used, the Event associated with this request will not be signaled.\r | |
981 | \r | |
982 | @param[in] This Indicates a pointer to the calling context.\r | |
983 | @param[in] MediaId The media ID that the write request is for.\r | |
984 | @param[in] Lba The starting logical block address to be written. The\r | |
985 | caller is responsible for writing to only legitimate\r | |
986 | locations.\r | |
987 | @param[in, out] Token A pointer to the token associated with the transaction.\r | |
988 | @param[in] BufferSize Size of Buffer, must be a multiple of device block size.\r | |
989 | @param[in] Buffer A pointer to the source buffer for the data.\r | |
990 | \r | |
991 | @retval EFI_SUCCESS The write request was queued if Event is not NULL.\r | |
992 | The data was written correctly to the device if\r | |
993 | the Event is NULL.\r | |
994 | @retval EFI_WRITE_PROTECTED The device can not be written to.\r | |
995 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
996 | @retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device.\r | |
997 | @retval EFI_DEVICE_ERROR The device reported an error while performing the write.\r | |
998 | @retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.\r | |
d1102dba | 999 | @retval EFI_INVALID_PARAMETER The write request contains LBAs that are not valid,\r |
490b5ea1 | 1000 | or the buffer is not on proper alignment.\r |
1001 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack\r | |
1002 | of resources.\r | |
1003 | \r | |
1004 | **/\r | |
1005 | EFI_STATUS\r | |
1006 | EFIAPI\r | |
1007 | PartitionWriteBlocksEx (\r | |
1008 | IN EFI_BLOCK_IO2_PROTOCOL *This,\r | |
1009 | IN UINT32 MediaId,\r | |
1010 | IN EFI_LBA Lba,\r | |
1011 | IN OUT EFI_BLOCK_IO2_TOKEN *Token,\r | |
1012 | IN UINTN BufferSize,\r | |
1013 | IN VOID *Buffer\r | |
1014 | )\r | |
1015 | {\r | |
493d8e3a | 1016 | EFI_STATUS Status;\r |
490b5ea1 | 1017 | PARTITION_PRIVATE_DATA *Private;\r |
1018 | UINT64 Offset;\r | |
493d8e3a | 1019 | PARTITION_ACCESS_TASK *Task;\r |
490b5ea1 | 1020 | \r |
65fd3952 RN |
1021 | Private = PARTITION_DEVICE_FROM_BLOCK_IO2_THIS (This);\r |
1022 | \r | |
490b5ea1 | 1023 | if (BufferSize % Private->BlockSize != 0) {\r |
493d8e3a | 1024 | return ProbeMediaStatusEx (Private->DiskIo2, MediaId, EFI_BAD_BUFFER_SIZE);\r |
490b5ea1 | 1025 | }\r |
1026 | \r | |
1027 | Offset = MultU64x32 (Lba, Private->BlockSize) + Private->Start;\r | |
1028 | if (Offset + BufferSize > Private->End) {\r | |
493d8e3a | 1029 | return ProbeMediaStatusEx (Private->DiskIo2, MediaId, EFI_INVALID_PARAMETER);\r |
490b5ea1 | 1030 | }\r |
d1102dba | 1031 | \r |
493d8e3a RN |
1032 | if ((Token != NULL) && (Token->Event != NULL)) {\r |
1033 | Task = PartitionCreateAccessTask (Token);\r | |
1034 | if (Task == NULL) {\r | |
1035 | return EFI_OUT_OF_RESOURCES;\r | |
1036 | }\r | |
490b5ea1 | 1037 | \r |
493d8e3a RN |
1038 | Status = Private->DiskIo2->WriteDiskEx (Private->DiskIo2, MediaId, Offset, &Task->DiskIo2Token, BufferSize, Buffer);\r |
1039 | if (EFI_ERROR (Status)) {\r | |
1040 | gBS->CloseEvent (Task->DiskIo2Token.Event);\r | |
1041 | FreePool (Task);\r | |
1042 | }\r | |
1043 | } else {\r | |
1044 | Status = Private->DiskIo2->WriteDiskEx (Private->DiskIo2, MediaId, Offset, NULL, BufferSize, Buffer);\r | |
490b5ea1 | 1045 | }\r |
493d8e3a | 1046 | return Status;\r |
490b5ea1 | 1047 | }\r |
1048 | \r | |
1049 | /**\r | |
1050 | Flush the Block Device.\r | |
d1102dba | 1051 | \r |
490b5ea1 | 1052 | If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED\r |
1053 | is returned and non-blocking I/O is being used, the Event associated with\r | |
d1102dba | 1054 | this request will not be signaled.\r |
490b5ea1 | 1055 | \r |
1056 | @param[in] This Indicates a pointer to the calling context.\r | |
86d8e199 | 1057 | @param[in, out] Token A pointer to the token associated with the transaction\r |
490b5ea1 | 1058 | \r |
1059 | @retval EFI_SUCCESS The flush request was queued if Event is not NULL.\r | |
1060 | All outstanding data was written correctly to the\r | |
1061 | device if the Event is NULL.\r | |
1062 | @retval EFI_DEVICE_ERROR The device reported an error while writting back\r | |
1063 | the data.\r | |
1064 | @retval EFI_WRITE_PROTECTED The device cannot be written to.\r | |
1065 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
1066 | @retval EFI_MEDIA_CHANGED The MediaId is not for the current media.\r | |
1067 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack\r | |
1068 | of resources.\r | |
1069 | \r | |
1070 | **/\r | |
1071 | EFI_STATUS\r | |
1072 | EFIAPI\r | |
1073 | PartitionFlushBlocksEx (\r | |
1074 | IN EFI_BLOCK_IO2_PROTOCOL *This,\r | |
1075 | IN OUT EFI_BLOCK_IO2_TOKEN *Token\r | |
1076 | )\r | |
1077 | {\r | |
493d8e3a | 1078 | EFI_STATUS Status;\r |
490b5ea1 | 1079 | PARTITION_PRIVATE_DATA *Private;\r |
493d8e3a | 1080 | PARTITION_ACCESS_TASK *Task;\r |
490b5ea1 | 1081 | \r |
1082 | Private = PARTITION_DEVICE_FROM_BLOCK_IO2_THIS (This);\r | |
1083 | \r | |
493d8e3a RN |
1084 | if ((Token != NULL) && (Token->Event != NULL)) {\r |
1085 | Task = PartitionCreateAccessTask (Token);\r | |
1086 | if (Task == NULL) {\r | |
1087 | return EFI_OUT_OF_RESOURCES;\r | |
1088 | }\r | |
490b5ea1 | 1089 | \r |
493d8e3a RN |
1090 | Status = Private->DiskIo2->FlushDiskEx (Private->DiskIo2, &Task->DiskIo2Token);\r |
1091 | if (EFI_ERROR (Status)) {\r | |
1092 | gBS->CloseEvent (Task->DiskIo2Token.Event);\r | |
1093 | FreePool (Task);\r | |
1094 | }\r | |
1095 | } else {\r | |
1096 | Status = Private->DiskIo2->FlushDiskEx (Private->DiskIo2, NULL);\r | |
1097 | }\r | |
1098 | return Status;\r | |
490b5ea1 | 1099 | }\r |
adbcbf8f | 1100 | \r |
1101 | \r | |
1102 | /**\r | |
1103 | Create a child handle for a logical block device that represents the\r | |
1104 | bytes Start to End of the Parent Block IO device.\r | |
1105 | \r | |
490b5ea1 | 1106 | @param[in] This Protocol instance pointer.\r |
1107 | @param[in] ParentHandle Parent Handle for new child.\r | |
1108 | @param[in] ParentDiskIo Parent DiskIo interface.\r | |
493d8e3a | 1109 | @param[in] ParentDiskIo2 Parent DiskIo2 interface.\r |
490b5ea1 | 1110 | @param[in] ParentBlockIo Parent BlockIo interface.\r |
1111 | @param[in] ParentBlockIo2 Parent BlockIo2 interface.\r | |
1112 | @param[in] ParentDevicePath Parent Device Path.\r | |
1113 | @param[in] DevicePathNode Child Device Path node.\r | |
3a3d62d2 | 1114 | @param[in] PartitionInfo Child Partition Information interface.\r |
490b5ea1 | 1115 | @param[in] Start Start Block.\r |
1116 | @param[in] End End Block.\r | |
1117 | @param[in] BlockSize Child block size.\r | |
709c9fd5 | 1118 | @param[in] TypeGuid Partition GUID Type.\r |
490b5ea1 | 1119 | \r |
1120 | @retval EFI_SUCCESS A child handle was added.\r | |
1121 | @retval other A child handle was not added.\r | |
adbcbf8f | 1122 | \r |
1123 | **/\r | |
1124 | EFI_STATUS\r | |
1125 | PartitionInstallChildHandle (\r | |
1126 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
1127 | IN EFI_HANDLE ParentHandle,\r | |
1128 | IN EFI_DISK_IO_PROTOCOL *ParentDiskIo,\r | |
493d8e3a | 1129 | IN EFI_DISK_IO2_PROTOCOL *ParentDiskIo2,\r |
adbcbf8f | 1130 | IN EFI_BLOCK_IO_PROTOCOL *ParentBlockIo,\r |
490b5ea1 | 1131 | IN EFI_BLOCK_IO2_PROTOCOL *ParentBlockIo2,\r |
adbcbf8f | 1132 | IN EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath,\r |
1133 | IN EFI_DEVICE_PATH_PROTOCOL *DevicePathNode,\r | |
3a3d62d2 | 1134 | IN EFI_PARTITION_INFO_PROTOCOL *PartitionInfo,\r |
adbcbf8f | 1135 | IN EFI_LBA Start,\r |
1136 | IN EFI_LBA End,\r | |
709c9fd5 JB |
1137 | IN UINT32 BlockSize,\r |
1138 | IN EFI_GUID *TypeGuid\r | |
adbcbf8f | 1139 | )\r |
1140 | {\r | |
1141 | EFI_STATUS Status;\r | |
1142 | PARTITION_PRIVATE_DATA *Private;\r | |
1143 | \r | |
490b5ea1 | 1144 | Status = EFI_SUCCESS;\r |
adbcbf8f | 1145 | Private = AllocateZeroPool (sizeof (PARTITION_PRIVATE_DATA));\r |
1146 | if (Private == NULL) {\r | |
1147 | return EFI_OUT_OF_RESOURCES;\r | |
1148 | }\r | |
1149 | \r | |
1150 | Private->Signature = PARTITION_PRIVATE_DATA_SIGNATURE;\r | |
1151 | \r | |
f82b827c ZG |
1152 | Private->Start = MultU64x32 (Start, ParentBlockIo->Media->BlockSize);\r |
1153 | Private->End = MultU64x32 (End + 1, ParentBlockIo->Media->BlockSize);\r | |
adbcbf8f | 1154 | \r |
1155 | Private->BlockSize = BlockSize;\r | |
1156 | Private->ParentBlockIo = ParentBlockIo;\r | |
490b5ea1 | 1157 | Private->ParentBlockIo2 = ParentBlockIo2;\r |
adbcbf8f | 1158 | Private->DiskIo = ParentDiskIo;\r |
493d8e3a | 1159 | Private->DiskIo2 = ParentDiskIo2;\r |
adbcbf8f | 1160 | \r |
d0844d13 | 1161 | //\r |
1162 | // Set the BlockIO into Private Data.\r | |
1163 | //\r | |
1164 | Private->BlockIo.Revision = ParentBlockIo->Revision;\r | |
d1102dba | 1165 | \r |
d0844d13 | 1166 | Private->BlockIo.Media = &Private->Media;\r |
1167 | CopyMem (Private->BlockIo.Media, ParentBlockIo->Media, sizeof (EFI_BLOCK_IO_MEDIA));\r | |
490b5ea1 | 1168 | \r |
d0844d13 | 1169 | Private->BlockIo.Reset = PartitionReset;\r |
1170 | Private->BlockIo.ReadBlocks = PartitionReadBlocks;\r | |
1171 | Private->BlockIo.WriteBlocks = PartitionWriteBlocks;\r | |
1172 | Private->BlockIo.FlushBlocks = PartitionFlushBlocks;\r | |
490b5ea1 | 1173 | \r |
d0844d13 | 1174 | //\r |
1175 | // Set the BlockIO2 into Private Data.\r | |
1176 | //\r | |
493d8e3a RN |
1177 | if (Private->DiskIo2 != NULL) {\r |
1178 | ASSERT (Private->ParentBlockIo2 != NULL);\r | |
490b5ea1 | 1179 | Private->BlockIo2.Media = &Private->Media2;\r |
1180 | CopyMem (Private->BlockIo2.Media, ParentBlockIo2->Media, sizeof (EFI_BLOCK_IO_MEDIA));\r | |
1181 | \r | |
1182 | Private->BlockIo2.Reset = PartitionResetEx;\r | |
1183 | Private->BlockIo2.ReadBlocksEx = PartitionReadBlocksEx;\r | |
1184 | Private->BlockIo2.WriteBlocksEx = PartitionWriteBlocksEx;\r | |
d1102dba | 1185 | Private->BlockIo2.FlushBlocksEx = PartitionFlushBlocksEx;\r |
490b5ea1 | 1186 | }\r |
67f802ed | 1187 | \r |
67f802ed | 1188 | Private->Media.IoAlign = 0;\r |
490b5ea1 | 1189 | Private->Media.LogicalPartition = TRUE;\r |
f82b827c ZG |
1190 | Private->Media.LastBlock = DivU64x32 (\r |
1191 | MultU64x32 (\r | |
1192 | End - Start + 1,\r | |
1193 | ParentBlockIo->Media->BlockSize\r | |
1194 | ),\r | |
1195 | BlockSize\r | |
1196 | ) - 1;\r | |
adbcbf8f | 1197 | \r |
67f802ed | 1198 | Private->Media.BlockSize = (UINT32) BlockSize;\r |
adbcbf8f | 1199 | \r |
493d8e3a | 1200 | Private->Media2.IoAlign = 0;\r |
490b5ea1 | 1201 | Private->Media2.LogicalPartition = TRUE;\r |
1202 | Private->Media2.LastBlock = Private->Media.LastBlock;\r | |
1203 | Private->Media2.BlockSize = (UINT32) BlockSize;\r | |
1204 | \r | |
fe3b68bb | 1205 | //\r |
0e87144e | 1206 | // Per UEFI Spec, LowestAlignedLba, LogicalBlocksPerPhysicalBlock and OptimalTransferLengthGranularity must be 0\r |
fe3b68bb RN |
1207 | // for logical partitions.\r |
1208 | //\r | |
1209 | if (Private->BlockIo.Revision >= EFI_BLOCK_IO_PROTOCOL_REVISION2) {\r | |
c582ad45 EB |
1210 | Private->Media.LowestAlignedLba = 0;\r |
1211 | Private->Media.LogicalBlocksPerPhysicalBlock = 0;\r | |
1212 | Private->Media2.LowestAlignedLba = 0;\r | |
1213 | Private->Media2.LogicalBlocksPerPhysicalBlock = 0;\r | |
0e87144e | 1214 | if (Private->BlockIo.Revision >= EFI_BLOCK_IO_PROTOCOL_REVISION3) {\r |
c582ad45 EB |
1215 | Private->Media.OptimalTransferLengthGranularity = 0;\r |
1216 | Private->Media2.OptimalTransferLengthGranularity = 0;\r | |
0e87144e | 1217 | }\r |
fe3b68bb RN |
1218 | }\r |
1219 | \r | |
490b5ea1 | 1220 | Private->DevicePath = AppendDevicePathNode (ParentDevicePath, DevicePathNode);\r |
adbcbf8f | 1221 | \r |
1222 | if (Private->DevicePath == NULL) {\r | |
1223 | FreePool (Private);\r | |
1224 | return EFI_OUT_OF_RESOURCES;\r | |
1225 | }\r | |
1226 | \r | |
3a3d62d2 HW |
1227 | //\r |
1228 | // Set the PartitionInfo into Private Data.\r | |
1229 | //\r | |
1230 | CopyMem (&Private->PartitionInfo, PartitionInfo, sizeof (EFI_PARTITION_INFO_PROTOCOL));\r | |
1231 | \r | |
709c9fd5 JB |
1232 | if (TypeGuid != NULL) {\r |
1233 | CopyGuid(&(Private->TypeGuid), TypeGuid);\r | |
adbcbf8f | 1234 | } else {\r |
709c9fd5 | 1235 | ZeroMem ((VOID *)&(Private->TypeGuid), sizeof (EFI_GUID));\r |
adbcbf8f | 1236 | }\r |
490b5ea1 | 1237 | \r |
adbcbf8f | 1238 | //\r |
d1102dba | 1239 | // Create the new handle.\r |
adbcbf8f | 1240 | //\r |
1241 | Private->Handle = NULL;\r | |
493d8e3a | 1242 | if (Private->DiskIo2 != NULL) {\r |
490b5ea1 | 1243 | Status = gBS->InstallMultipleProtocolInterfaces (\r |
1244 | &Private->Handle,\r | |
1245 | &gEfiDevicePathProtocolGuid,\r | |
1246 | Private->DevicePath,\r | |
1247 | &gEfiBlockIoProtocolGuid,\r | |
1248 | &Private->BlockIo,\r | |
1249 | &gEfiBlockIo2ProtocolGuid,\r | |
1250 | &Private->BlockIo2,\r | |
3a3d62d2 HW |
1251 | &gEfiPartitionInfoProtocolGuid,\r |
1252 | &Private->PartitionInfo,\r | |
709c9fd5 | 1253 | TypeGuid,\r |
490b5ea1 | 1254 | NULL,\r |
1255 | NULL\r | |
1256 | );\r | |
d1102dba | 1257 | } else {\r |
d0844d13 | 1258 | Status = gBS->InstallMultipleProtocolInterfaces (\r |
1259 | &Private->Handle,\r | |
1260 | &gEfiDevicePathProtocolGuid,\r | |
1261 | Private->DevicePath,\r | |
1262 | &gEfiBlockIoProtocolGuid,\r | |
1263 | &Private->BlockIo,\r | |
3a3d62d2 HW |
1264 | &gEfiPartitionInfoProtocolGuid,\r |
1265 | &Private->PartitionInfo,\r | |
709c9fd5 | 1266 | TypeGuid,\r |
d0844d13 | 1267 | NULL,\r |
1268 | NULL\r | |
1269 | );\r | |
490b5ea1 | 1270 | }\r |
adbcbf8f | 1271 | \r |
1272 | if (!EFI_ERROR (Status)) {\r | |
1273 | //\r | |
1274 | // Open the Parent Handle for the child\r | |
1275 | //\r | |
1276 | Status = gBS->OpenProtocol (\r | |
1277 | ParentHandle,\r | |
1278 | &gEfiDiskIoProtocolGuid,\r | |
1279 | (VOID **) &ParentDiskIo,\r | |
1280 | This->DriverBindingHandle,\r | |
1281 | Private->Handle,\r | |
1282 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r | |
1283 | );\r | |
1284 | } else {\r | |
1285 | FreePool (Private->DevicePath);\r | |
1286 | FreePool (Private);\r | |
c7195b9e ZG |
1287 | \r |
1288 | //\r | |
1289 | // if the Status == EFI_ALREADY_STARTED, it means the child handles\r | |
1290 | // are already installed. So return EFI_SUCCESS to avoid do the next\r | |
1291 | // partition type check.\r | |
1292 | //\r | |
1293 | if (Status == EFI_ALREADY_STARTED) {\r | |
1294 | Status = EFI_SUCCESS;\r | |
1295 | }\r | |
adbcbf8f | 1296 | }\r |
1297 | \r | |
1298 | return Status;\r | |
1299 | }\r | |
1300 | \r | |
1301 | \r | |
1302 | /**\r | |
1303 | The user Entry Point for module Partition. The user code starts with this function.\r | |
1304 | \r | |
d1102dba | 1305 | @param[in] ImageHandle The firmware allocated handle for the EFI image.\r |
adbcbf8f | 1306 | @param[in] SystemTable A pointer to the EFI System Table.\r |
d1102dba | 1307 | \r |
adbcbf8f | 1308 | @retval EFI_SUCCESS The entry point is executed successfully.\r |
1309 | @retval other Some error occurs when executing this entry point.\r | |
1310 | \r | |
1311 | **/\r | |
1312 | EFI_STATUS\r | |
1313 | EFIAPI\r | |
1314 | InitializePartition (\r | |
1315 | IN EFI_HANDLE ImageHandle,\r | |
1316 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
1317 | )\r | |
1318 | {\r | |
1319 | EFI_STATUS Status;\r | |
1320 | \r | |
1321 | //\r | |
1322 | // Install driver model protocol(s).\r | |
1323 | //\r | |
d38a0f44 | 1324 | Status = EfiLibInstallDriverBindingComponentName2 (\r |
adbcbf8f | 1325 | ImageHandle,\r |
1326 | SystemTable,\r | |
1327 | &gPartitionDriverBinding,\r | |
1328 | ImageHandle,\r | |
1329 | &gPartitionComponentName,\r | |
d38a0f44 | 1330 | &gPartitionComponentName2\r |
adbcbf8f | 1331 | );\r |
1332 | ASSERT_EFI_ERROR (Status);\r | |
1333 | \r | |
1334 | \r | |
1335 | return Status;\r | |
1336 | }\r | |
1337 | \r | |
e3325721 HW |
1338 | \r |
1339 | /**\r | |
1340 | Test to see if there is any child on ControllerHandle.\r | |
1341 | \r | |
1342 | @param[in] ControllerHandle Handle of device to test.\r | |
1343 | \r | |
1344 | @retval TRUE There are children on the ControllerHandle.\r | |
1345 | @retval FALSE No child is on the ControllerHandle.\r | |
1346 | \r | |
1347 | **/\r | |
1348 | BOOLEAN\r | |
1349 | HasChildren (\r | |
1350 | IN EFI_HANDLE ControllerHandle\r | |
1351 | )\r | |
1352 | {\r | |
1353 | EFI_OPEN_PROTOCOL_INFORMATION_ENTRY *OpenInfoBuffer;\r | |
1354 | UINTN EntryCount;\r | |
1355 | EFI_STATUS Status;\r | |
1356 | UINTN Index;\r | |
1357 | \r | |
1358 | Status = gBS->OpenProtocolInformation (\r | |
1359 | ControllerHandle,\r | |
1360 | &gEfiDiskIoProtocolGuid,\r | |
1361 | &OpenInfoBuffer,\r | |
1362 | &EntryCount\r | |
1363 | );\r | |
1364 | ASSERT_EFI_ERROR (Status);\r | |
1365 | \r | |
1366 | for (Index = 0; Index < EntryCount; Index++) {\r | |
1367 | if ((OpenInfoBuffer[Index].Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) != 0) {\r | |
1368 | break;\r | |
1369 | }\r | |
1370 | }\r | |
1371 | FreePool (OpenInfoBuffer);\r | |
1372 | \r | |
1373 | return (BOOLEAN) (Index < EntryCount);\r | |
1374 | }\r | |
1375 | \r |