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1 | /*++\r | |
2 | \r | |
3 | Copyright (c) 2006, Intel Corporation\r | |
4 | All rights reserved. This program and the accompanying materials\r | |
5 | are licensed and made available under the terms and conditions of the BSD License\r | |
6 | which accompanies this distribution. The full text of the license may be found at\r | |
7 | http://opensource.org/licenses/bsd-license.php\r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
11 | \r | |
12 | Module Name:\r | |
13 | \r | |
14 | DiskIo.c\r | |
15 | \r | |
16 | Abstract:\r | |
17 | \r | |
18 | DiskIo driver that layers it's self on every Block IO protocol in the system.\r | |
19 | DiskIo converts a block oriented device to a byte oriented device.\r | |
20 | \r | |
21 | ReadDisk may have to do reads that are not aligned on sector boundaries.\r | |
22 | There are three cases:\r | |
23 | \r | |
24 | UnderRun - The first byte is not on a sector boundary or the read request is\r | |
25 | less than a sector in length.\r | |
26 | \r | |
27 | Aligned - A read of N contiguous sectors.\r | |
28 | \r | |
29 | OverRun - The last byte is not on a sector boundary.\r | |
30 | \r | |
31 | --*/\r | |
32 | \r | |
33 | #include "DiskIo.h"\r | |
34 | \r | |
35 | //\r | |
36 | // Prototypes\r | |
37 | // Driver model protocol interface\r | |
38 | //\r | |
39 | EFI_STATUS\r | |
40 | EFIAPI\r | |
41 | DiskIoDriverBindingSupported (\r | |
42 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
43 | IN EFI_HANDLE ControllerHandle,\r | |
44 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
45 | );\r | |
46 | \r | |
47 | EFI_STATUS\r | |
48 | EFIAPI\r | |
49 | DiskIoDriverBindingStart (\r | |
50 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
51 | IN EFI_HANDLE ControllerHandle,\r | |
52 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
53 | );\r | |
54 | \r | |
55 | EFI_STATUS\r | |
56 | EFIAPI\r | |
57 | DiskIoDriverBindingStop (\r | |
58 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
59 | IN EFI_HANDLE ControllerHandle,\r | |
60 | IN UINTN NumberOfChildren,\r | |
61 | IN EFI_HANDLE *ChildHandleBuffer\r | |
62 | );\r | |
63 | \r | |
64 | //\r | |
65 | // Disk I/O Protocol Interface\r | |
66 | //\r | |
67 | EFI_STATUS\r | |
68 | EFIAPI\r | |
69 | DiskIoReadDisk (\r | |
70 | IN EFI_DISK_IO_PROTOCOL *This,\r | |
71 | IN UINT32 MediaId,\r | |
72 | IN UINT64 Offset,\r | |
73 | IN UINTN BufferSize,\r | |
74 | OUT VOID *Buffer\r | |
75 | );\r | |
76 | \r | |
77 | EFI_STATUS\r | |
78 | EFIAPI\r | |
79 | DiskIoWriteDisk (\r | |
80 | IN EFI_DISK_IO_PROTOCOL *This,\r | |
81 | IN UINT32 MediaId,\r | |
82 | IN UINT64 Offset,\r | |
83 | IN UINTN BufferSize,\r | |
84 | IN VOID *Buffer\r | |
85 | );\r | |
86 | \r | |
87 | EFI_DRIVER_BINDING_PROTOCOL gDiskIoDriverBinding = {\r | |
88 | DiskIoDriverBindingSupported,\r | |
89 | DiskIoDriverBindingStart,\r | |
90 | DiskIoDriverBindingStop,\r | |
91 | 0x10,\r | |
92 | NULL,\r | |
93 | NULL\r | |
94 | };\r | |
95 | \r | |
96 | DISK_IO_PRIVATE_DATA gDiskIoPrivateDataTemplate = {\r | |
97 | DISK_IO_PRIVATE_DATA_SIGNATURE,\r | |
98 | {\r | |
99 | EFI_DISK_IO_PROTOCOL_REVISION,\r | |
100 | DiskIoReadDisk,\r | |
101 | DiskIoWriteDisk\r | |
102 | },\r | |
103 | NULL\r | |
104 | };\r | |
105 | \r | |
106 | EFI_STATUS\r | |
107 | EFIAPI\r | |
108 | DiskIoDriverBindingSupported (\r | |
109 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
110 | IN EFI_HANDLE ControllerHandle,\r | |
111 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL\r | |
112 | )\r | |
113 | /*++\r | |
114 | \r | |
115 | Routine Description:\r | |
116 | Test to see if this driver supports ControllerHandle. Any ControllerHandle\r | |
117 | than contains a BlockIo protocol can be supported.\r | |
118 | \r | |
119 | Arguments:\r | |
120 | This - Protocol instance pointer.\r | |
121 | ControllerHandle - Handle of device to test.\r | |
122 | RemainingDevicePath - Not used.\r | |
123 | \r | |
124 | Returns:\r | |
125 | EFI_SUCCESS - This driver supports this device.\r | |
126 | EFI_ALREADY_STARTED - This driver is already running on this device.\r | |
127 | other - This driver does not support this device.\r | |
128 | \r | |
129 | --*/\r | |
130 | {\r | |
131 | EFI_STATUS Status;\r | |
132 | EFI_BLOCK_IO_PROTOCOL *BlockIo;\r | |
133 | /*\r | |
134 | DEBUG_CODE_BEGIN\r | |
135 | UINT32 Bar;\r | |
136 | UINT32 Foo;\r | |
137 | UINT32 HotPlug;\r | |
138 | \r | |
139 | //\r | |
140 | // Get TYPE 0\r | |
141 | //\r | |
142 | Bar = PcdGet32 (PciExpressBaseVersion);\r | |
143 | DEBUG ((EFI_D_ERROR, "PciExpressBaseVersion = %08x\n", Bar));\r | |
144 | \r | |
145 | //\r | |
146 | // Get TYPE 1\r | |
147 | //\r | |
148 | Foo = PcdGet32 (PciExpressBaseAddress);\r | |
149 | DEBUG ((EFI_D_ERROR, "PciExpressBaseAddress = %08x\n", Foo));\r | |
150 | \r | |
151 | //\r | |
152 | // Set TYPE 1\r | |
153 | //\r | |
154 | PcdSet32 (PciExpressBaseAddress, Foo + 1);\r | |
155 | \r | |
156 | //\r | |
157 | // Get TYPE 1\r | |
158 | //\r | |
159 | Foo = PcdGet32 (PciExpressBaseAddress);\r | |
160 | DEBUG ((EFI_D_ERROR, "PciExpressBaseAddress = %08x\n", Foo));\r | |
161 | \r | |
162 | //\r | |
163 | // Get TYPE 2\r | |
164 | //\r | |
165 | HotPlug = PcdGet32 (PciExpressBaseHotPlug);\r | |
166 | DEBUG ((EFI_D_ERROR, "PciExpressHotPlug = %08x\n", HotPlug));\r | |
167 | \r | |
168 | //\r | |
169 | // Set TYPE 1\r | |
170 | //\r | |
171 | PcdSet32 (PciExpressBaseHotPlug, HotPlug + 1);\r | |
172 | \r | |
173 | //\r | |
174 | // Get TYPE 1\r | |
175 | //\r | |
176 | HotPlug = PcdGet32 (PciExpressBaseHotPlug);\r | |
177 | DEBUG ((EFI_D_ERROR, "PciExpressHotPlug = %08x\n", HotPlug));\r | |
178 | \r | |
179 | DEBUG_CODE_END\r | |
180 | \r | |
181 | DEBUG_CODE_BEGIN\r | |
182 | UINT32 MyVariable;\r | |
183 | \r | |
184 | if (ControllerHandle == NULL) {\r | |
185 | MyVariable = 32 * (UINTN)This;\r | |
186 | ControllerHandle = (EFI_HANDLE)MyVariable;\r | |
187 | DEBUG ((EFI_D_ERROR, "DiskIoSupported-DebugCode. MyVariable = %08x\n", MyVariable));\r | |
188 | ASSERT (MyVariable != 32);\r | |
189 | }\r | |
190 | DEBUG_CODE_END\r | |
191 | */\r | |
192 | DEBUG ((EFI_D_ERROR, "DiskIoSupported\n"));\r | |
193 | \r | |
194 | // Io8Or (0x400, 1);\r | |
195 | // Io8And (0x400, 1);\r | |
196 | // Io8AndThenOr (0x400, 1, 2);\r | |
197 | \r | |
198 | // Mmio8Or (0xa0000000, 1);\r | |
199 | // Mmio8And (0xa0000000, 1);\r | |
200 | // Mmio8AndThenOr (0xa0000000, 1, 2);\r | |
201 | \r | |
202 | /*\r | |
203 | PciRead8 (PCI_LIB_ADDRESS (1,2,3,4));\r | |
204 | PciRead16 (PCI_LIB_ADDRESS (1,2,3,4));\r | |
205 | PciRead32 (PCI_LIB_ADDRESS (1,2,3,4));\r | |
206 | \r | |
207 | PciWrite8 (PCI_LIB_ADDRESS (1,2,3,4), 0xAA);\r | |
208 | PciWrite16 (PCI_LIB_ADDRESS (1,2,3,4), 0xAA55);\r | |
209 | PciWrite32 (PCI_LIB_ADDRESS (1,2,3,4), 0xAA55A55A);\r | |
210 | \r | |
211 | Pci8Or (PCI_LIB_ADDRESS (1,2,3,4), 0xAA);\r | |
212 | Pci8And (PCI_LIB_ADDRESS (1,2,3,4), 0x55);\r | |
213 | Pci8AndThenOr (PCI_LIB_ADDRESS (1,2,3,4), 0xAA, 0x55);\r | |
214 | \r | |
215 | Pci16Or (PCI_LIB_ADDRESS (1,2,3,4), 0xAA55);\r | |
216 | Pci16And (PCI_LIB_ADDRESS (1,2,3,4), 0x55AA);\r | |
217 | Pci16AndThenOr (PCI_LIB_ADDRESS (1,2,3,4), 0xAA55, 0x55AA);\r | |
218 | \r | |
219 | Pci32Or (PCI_LIB_ADDRESS (1,2,3,4), 0xAA55A55A);\r | |
220 | Pci32And (PCI_LIB_ADDRESS (1,2,3,4), 0x55AA5AA5);\r | |
221 | Pci32AndThenOr (PCI_LIB_ADDRESS (1,2,3,4), 0xAA555AA5, 0x55AAA55A);\r | |
222 | */\r | |
223 | //\r | |
224 | // Open the IO Abstraction(s) needed to perform the supported test.\r | |
225 | //\r | |
226 | Status = gBS->OpenProtocol (\r | |
227 | ControllerHandle,\r | |
228 | &gEfiBlockIoProtocolGuid,\r | |
229 | (VOID **) &BlockIo,\r | |
230 | This->DriverBindingHandle,\r | |
231 | ControllerHandle,\r | |
232 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
233 | );\r | |
234 | if (EFI_ERROR (Status)) {\r | |
235 | return Status;\r | |
236 | }\r | |
237 | //\r | |
238 | // Close the I/O Abstraction(s) used to perform the supported test.\r | |
239 | //\r | |
240 | gBS->CloseProtocol (\r | |
241 | ControllerHandle,\r | |
242 | &gEfiBlockIoProtocolGuid,\r | |
243 | This->DriverBindingHandle,\r | |
244 | ControllerHandle\r | |
245 | );\r | |
246 | return EFI_SUCCESS;\r | |
247 | }\r | |
248 | \r | |
249 | EFI_STATUS\r | |
250 | EFIAPI\r | |
251 | DiskIoDriverBindingStart (\r | |
252 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
253 | IN EFI_HANDLE ControllerHandle,\r | |
254 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL\r | |
255 | )\r | |
256 | /*++\r | |
257 | \r | |
258 | Routine Description:\r | |
259 | Start this driver on ControllerHandle by opening a Block IO protocol and\r | |
260 | installing a Disk IO protocol on ControllerHandle.\r | |
261 | \r | |
262 | Arguments:\r | |
263 | This - Protocol instance pointer.\r | |
264 | ControllerHandle - Handle of device to bind driver to.\r | |
265 | RemainingDevicePath - Not used, always produce all possible children.\r | |
266 | \r | |
267 | Returns:\r | |
268 | EFI_SUCCESS - This driver is added to ControllerHandle.\r | |
269 | EFI_ALREADY_STARTED - This driver is already running on ControllerHandle.\r | |
270 | other - This driver does not support this device.\r | |
271 | \r | |
272 | --*/\r | |
273 | {\r | |
274 | EFI_STATUS Status;\r | |
275 | DISK_IO_PRIVATE_DATA *Private;\r | |
276 | \r | |
277 | Private = NULL;\r | |
278 | \r | |
279 | DEBUG ((EFI_D_ERROR, "DiskIoStart\n"));\r | |
280 | //\r | |
281 | // Connect to the Block IO interface on ControllerHandle.\r | |
282 | //\r | |
283 | Status = gBS->OpenProtocol (\r | |
284 | ControllerHandle,\r | |
285 | &gEfiBlockIoProtocolGuid,\r | |
286 | (VOID **) &gDiskIoPrivateDataTemplate.BlockIo,\r | |
287 | This->DriverBindingHandle,\r | |
288 | ControllerHandle,\r | |
289 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
290 | );\r | |
291 | if (EFI_ERROR (Status)) {\r | |
292 | return Status;\r | |
293 | }\r | |
294 | //\r | |
295 | // Initialize the Disk IO device instance.\r | |
296 | //\r | |
297 | Private = AllocateCopyPool (sizeof (DISK_IO_PRIVATE_DATA), &gDiskIoPrivateDataTemplate);\r | |
298 | if (Private == NULL) {\r | |
299 | Status = EFI_OUT_OF_RESOURCES;\r | |
300 | goto ErrorExit;\r | |
301 | }\r | |
302 | //\r | |
303 | // Install protocol interfaces for the Disk IO device.\r | |
304 | //\r | |
305 | Status = gBS->InstallProtocolInterface (\r | |
306 | &ControllerHandle,\r | |
307 | &gEfiDiskIoProtocolGuid,\r | |
308 | EFI_NATIVE_INTERFACE,\r | |
309 | &Private->DiskIo\r | |
310 | );\r | |
311 | \r | |
312 | ErrorExit:\r | |
313 | if (EFI_ERROR (Status)) {\r | |
314 | \r | |
315 | if (Private != NULL) {\r | |
316 | gBS->FreePool (Private);\r | |
317 | }\r | |
318 | \r | |
319 | gBS->CloseProtocol (\r | |
320 | ControllerHandle,\r | |
321 | &gEfiBlockIoProtocolGuid,\r | |
322 | This->DriverBindingHandle,\r | |
323 | ControllerHandle\r | |
324 | );\r | |
325 | }\r | |
326 | \r | |
327 | return Status;\r | |
328 | }\r | |
329 | \r | |
330 | EFI_STATUS\r | |
331 | EFIAPI\r | |
332 | DiskIoDriverBindingStop (\r | |
333 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
334 | IN EFI_HANDLE ControllerHandle,\r | |
335 | IN UINTN NumberOfChildren,\r | |
336 | IN EFI_HANDLE *ChildHandleBuffer\r | |
337 | )\r | |
338 | /*++\r | |
339 | \r | |
340 | Routine Description:\r | |
341 | Stop this driver on ControllerHandle by removing Disk IO protocol and closing\r | |
342 | the Block IO protocol on ControllerHandle.\r | |
343 | \r | |
344 | Arguments:\r | |
345 | This - Protocol instance pointer.\r | |
346 | ControllerHandle - Handle of device to stop driver on.\r | |
347 | NumberOfChildren - Not used.\r | |
348 | ChildHandleBuffer - Not used.\r | |
349 | \r | |
350 | Returns:\r | |
351 | EFI_SUCCESS - This driver is removed ControllerHandle.\r | |
352 | other - This driver was not removed from this device.\r | |
353 | EFI_UNSUPPORTED\r | |
354 | \r | |
355 | --*/\r | |
356 | {\r | |
357 | EFI_STATUS Status;\r | |
358 | EFI_DISK_IO_PROTOCOL *DiskIo;\r | |
359 | DISK_IO_PRIVATE_DATA *Private;\r | |
360 | \r | |
361 | DEBUG ((EFI_D_ERROR, "DiskIoStop\n"));\r | |
362 | //\r | |
363 | // Get our context back.\r | |
364 | //\r | |
365 | Status = gBS->OpenProtocol (\r | |
366 | ControllerHandle,\r | |
367 | &gEfiDiskIoProtocolGuid,\r | |
368 | (VOID **) &DiskIo,\r | |
369 | This->DriverBindingHandle,\r | |
370 | ControllerHandle,\r | |
371 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
372 | );\r | |
373 | if (EFI_ERROR (Status)) {\r | |
374 | return EFI_UNSUPPORTED;\r | |
375 | }\r | |
376 | \r | |
377 | Private = DISK_IO_PRIVATE_DATA_FROM_THIS (DiskIo);\r | |
378 | \r | |
379 | Status = gBS->UninstallProtocolInterface (\r | |
380 | ControllerHandle,\r | |
381 | &gEfiDiskIoProtocolGuid,\r | |
382 | &Private->DiskIo\r | |
383 | );\r | |
384 | if (!EFI_ERROR (Status)) {\r | |
385 | \r | |
386 | Status = gBS->CloseProtocol (\r | |
387 | ControllerHandle,\r | |
388 | &gEfiBlockIoProtocolGuid,\r | |
389 | This->DriverBindingHandle,\r | |
390 | ControllerHandle\r | |
391 | );\r | |
392 | }\r | |
393 | \r | |
394 | if (!EFI_ERROR (Status)) {\r | |
395 | gBS->FreePool (Private);\r | |
396 | }\r | |
397 | \r | |
398 | return Status;\r | |
399 | }\r | |
400 | \r | |
401 | EFI_STATUS\r | |
402 | EFIAPI\r | |
403 | DiskIoReadDisk (\r | |
404 | IN EFI_DISK_IO_PROTOCOL *This,\r | |
405 | IN UINT32 MediaId,\r | |
406 | IN UINT64 Offset,\r | |
407 | IN UINTN BufferSize,\r | |
408 | OUT VOID *Buffer\r | |
409 | )\r | |
410 | /*++\r | |
411 | \r | |
412 | Routine Description:\r | |
413 | Read BufferSize bytes from Offset into Buffer.\r | |
414 | \r | |
415 | Reads may support reads that are not aligned on\r | |
416 | sector boundaries. There are three cases:\r | |
417 | \r | |
418 | UnderRun - The first byte is not on a sector boundary or the read request is\r | |
419 | less than a sector in length.\r | |
420 | \r | |
421 | Aligned - A read of N contiguous sectors.\r | |
422 | \r | |
423 | OverRun - The last byte is not on a sector boundary.\r | |
424 | \r | |
425 | \r | |
426 | Arguments:\r | |
427 | This - Protocol instance pointer.\r | |
428 | MediaId - Id of the media, changes every time the media is replaced.\r | |
429 | Offset - The starting byte offset to read from.\r | |
430 | BufferSize - Size of Buffer.\r | |
431 | Buffer - Buffer containing read data.\r | |
432 | \r | |
433 | Returns:\r | |
434 | EFI_SUCCESS - The data was read correctly from the device.\r | |
435 | EFI_DEVICE_ERROR - The device reported an error while performing the read.\r | |
436 | EFI_NO_MEDIA - There is no media in the device.\r | |
437 | EFI_MEDIA_CHNAGED - The MediaId does not matched the current device.\r | |
438 | EFI_INVALID_PARAMETER - The read request contains device addresses that are not\r | |
439 | valid for the device.\r | |
440 | EFI_OUT_OF_RESOURCES\r | |
441 | \r | |
442 | --*/\r | |
443 | {\r | |
444 | EFI_STATUS Status;\r | |
445 | DISK_IO_PRIVATE_DATA *Private;\r | |
446 | EFI_BLOCK_IO_PROTOCOL *BlockIo;\r | |
447 | EFI_BLOCK_IO_MEDIA *Media;\r | |
448 | UINT32 BlockSize;\r | |
449 | UINT64 Lba;\r | |
450 | UINT64 OverRunLba;\r | |
451 | UINT32 UnderRun;\r | |
452 | UINT32 OverRun;\r | |
453 | BOOLEAN TransactionComplete;\r | |
454 | UINTN WorkingBufferSize;\r | |
455 | UINT8 *WorkingBuffer;\r | |
456 | UINTN Length;\r | |
457 | UINT8 *Data;\r | |
458 | UINT8 *PreData;\r | |
459 | UINTN IsBufferAligned;\r | |
460 | UINTN DataBufferSize;\r | |
461 | BOOLEAN LastRead;\r | |
462 | \r | |
463 | DEBUG ((EFI_D_ERROR, "DiskIoReadDisk\n"));\r | |
464 | \r | |
465 | Private = DISK_IO_PRIVATE_DATA_FROM_THIS (This);\r | |
466 | \r | |
467 | BlockIo = Private->BlockIo;\r | |
468 | Media = BlockIo->Media;\r | |
469 | BlockSize = Media->BlockSize;\r | |
470 | \r | |
471 | if (Media->MediaId != MediaId) {\r | |
472 | return EFI_MEDIA_CHANGED;\r | |
473 | }\r | |
474 | \r | |
475 | WorkingBuffer = Buffer;\r | |
476 | WorkingBufferSize = BufferSize;\r | |
477 | \r | |
478 | //\r | |
479 | // Allocate a temporary buffer for operation\r | |
480 | //\r | |
481 | DataBufferSize = BlockSize * DATA_BUFFER_BLOCK_NUM;\r | |
482 | \r | |
483 | if (Media->IoAlign > 1) {\r | |
484 | PreData = AllocatePool (DataBufferSize + Media->IoAlign);\r | |
485 | Data = PreData - ((UINTN) PreData & (Media->IoAlign - 1)) + Media->IoAlign;\r | |
486 | } else {\r | |
487 | PreData = AllocatePool (DataBufferSize);\r | |
488 | Data = PreData;\r | |
489 | }\r | |
490 | \r | |
491 | if (PreData == NULL) {\r | |
492 | return EFI_OUT_OF_RESOURCES;\r | |
493 | }\r | |
494 | \r | |
495 | Lba = DivU64x32Remainder (Offset, BlockSize, &UnderRun);\r | |
496 | \r | |
497 | Length = BlockSize - UnderRun;\r | |
498 | TransactionComplete = FALSE;\r | |
499 | \r | |
500 | Status = EFI_SUCCESS;\r | |
501 | if (UnderRun != 0) {\r | |
502 | //\r | |
503 | // Offset starts in the middle of an Lba, so read the entire block.\r | |
504 | //\r | |
505 | Status = BlockIo->ReadBlocks (\r | |
506 | BlockIo,\r | |
507 | MediaId,\r | |
508 | Lba,\r | |
509 | BlockSize,\r | |
510 | Data\r | |
511 | );\r | |
512 | \r | |
513 | if (EFI_ERROR (Status)) {\r | |
514 | goto Done;\r | |
515 | }\r | |
516 | \r | |
517 | if (Length > BufferSize) {\r | |
518 | Length = BufferSize;\r | |
519 | TransactionComplete = TRUE;\r | |
520 | }\r | |
521 | \r | |
522 | CopyMem (WorkingBuffer, Data + UnderRun, Length);\r | |
523 | \r | |
524 | WorkingBuffer += Length;\r | |
525 | \r | |
526 | WorkingBufferSize -= Length;\r | |
527 | if (WorkingBufferSize == 0) {\r | |
528 | goto Done;\r | |
529 | }\r | |
530 | \r | |
531 | Lba += 1;\r | |
532 | }\r | |
533 | \r | |
534 | OverRunLba = Lba + DivU64x32Remainder (WorkingBufferSize, BlockSize, &OverRun);\r | |
535 | \r | |
536 | if (!TransactionComplete && WorkingBufferSize >= BlockSize) {\r | |
537 | //\r | |
538 | // If the DiskIo maps directly to a BlockIo device do the read.\r | |
539 | //\r | |
540 | if (OverRun != 0) {\r | |
541 | WorkingBufferSize -= OverRun;\r | |
542 | }\r | |
543 | //\r | |
544 | // Check buffer alignment\r | |
545 | //\r | |
546 | IsBufferAligned = (UINTN) WorkingBuffer & (UINTN) (Media->IoAlign - 1);\r | |
547 | \r | |
548 | if (Media->IoAlign <= 1 || IsBufferAligned == 0) {\r | |
549 | //\r | |
550 | // Alignment is satisfied, so read them together\r | |
551 | //\r | |
552 | Status = BlockIo->ReadBlocks (\r | |
553 | BlockIo,\r | |
554 | MediaId,\r | |
555 | Lba,\r | |
556 | WorkingBufferSize,\r | |
557 | WorkingBuffer\r | |
558 | );\r | |
559 | \r | |
560 | if (EFI_ERROR (Status)) {\r | |
561 | goto Done;\r | |
562 | }\r | |
563 | \r | |
564 | WorkingBuffer += WorkingBufferSize;\r | |
565 | \r | |
566 | } else {\r | |
567 | //\r | |
568 | // Use the allocated buffer instead of the original buffer\r | |
569 | // to avoid alignment issue.\r | |
570 | // Here, the allocated buffer (8-byte align) can satisfy the alignment\r | |
571 | //\r | |
572 | LastRead = FALSE;\r | |
573 | do {\r | |
574 | if (WorkingBufferSize <= DataBufferSize) {\r | |
575 | //\r | |
576 | // It is the last calling to readblocks in this loop\r | |
577 | //\r | |
578 | DataBufferSize = WorkingBufferSize;\r | |
579 | LastRead = TRUE;\r | |
580 | }\r | |
581 | \r | |
582 | Status = BlockIo->ReadBlocks (\r | |
583 | BlockIo,\r | |
584 | MediaId,\r | |
585 | Lba,\r | |
586 | DataBufferSize,\r | |
587 | Data\r | |
588 | );\r | |
589 | if (EFI_ERROR (Status)) {\r | |
590 | goto Done;\r | |
591 | }\r | |
592 | \r | |
593 | CopyMem (WorkingBuffer, Data, DataBufferSize);\r | |
594 | WorkingBufferSize -= DataBufferSize;\r | |
595 | WorkingBuffer += DataBufferSize;\r | |
596 | Lba += DATA_BUFFER_BLOCK_NUM;\r | |
597 | } while (!LastRead);\r | |
598 | }\r | |
599 | }\r | |
600 | \r | |
601 | if (!TransactionComplete && OverRun != 0) {\r | |
602 | //\r | |
603 | // Last read is not a complete block.\r | |
604 | //\r | |
605 | Status = BlockIo->ReadBlocks (\r | |
606 | BlockIo,\r | |
607 | MediaId,\r | |
608 | OverRunLba,\r | |
609 | BlockSize,\r | |
610 | Data\r | |
611 | );\r | |
612 | \r | |
613 | if (EFI_ERROR (Status)) {\r | |
614 | goto Done;\r | |
615 | }\r | |
616 | \r | |
617 | CopyMem (WorkingBuffer, Data, OverRun);\r | |
618 | }\r | |
619 | \r | |
620 | Done:\r | |
621 | if (PreData != NULL) {\r | |
622 | gBS->FreePool (PreData);\r | |
623 | }\r | |
624 | \r | |
625 | return Status;\r | |
626 | }\r | |
627 | \r | |
628 | EFI_STATUS\r | |
629 | EFIAPI\r | |
630 | DiskIoWriteDisk (\r | |
631 | IN EFI_DISK_IO_PROTOCOL *This,\r | |
632 | IN UINT32 MediaId,\r | |
633 | IN UINT64 Offset,\r | |
634 | IN UINTN BufferSize,\r | |
635 | IN VOID *Buffer\r | |
636 | )\r | |
637 | /*++\r | |
638 | \r | |
639 | Routine Description:\r | |
640 | Read BufferSize bytes from Offset into Buffer.\r | |
641 | \r | |
642 | Writes may require a read modify write to support writes that are not\r | |
643 | aligned on sector boundaries. There are three cases:\r | |
644 | \r | |
645 | UnderRun - The first byte is not on a sector boundary or the write request\r | |
646 | is less than a sector in length. Read modify write is required.\r | |
647 | \r | |
648 | Aligned - A write of N contiguous sectors.\r | |
649 | \r | |
650 | OverRun - The last byte is not on a sector boundary. Read modified write\r | |
651 | required.\r | |
652 | \r | |
653 | Arguments:\r | |
654 | This - Protocol instance pointer.\r | |
655 | MediaId - Id of the media, changes every time the media is replaced.\r | |
656 | Offset - The starting byte offset to read from.\r | |
657 | BufferSize - Size of Buffer.\r | |
658 | Buffer - Buffer containing read data.\r | |
659 | \r | |
660 | Returns:\r | |
661 | EFI_SUCCESS - The data was written correctly to the device.\r | |
662 | EFI_WRITE_PROTECTED - The device can not be written to.\r | |
663 | EFI_DEVICE_ERROR - The device reported an error while performing the write.\r | |
664 | EFI_NO_MEDIA - There is no media in the device.\r | |
665 | EFI_MEDIA_CHNAGED - The MediaId does not matched the current device.\r | |
666 | EFI_INVALID_PARAMETER - The write request contains device addresses that are not\r | |
667 | valid for the device.\r | |
668 | EFI_OUT_OF_RESOURCES\r | |
669 | \r | |
670 | --*/\r | |
671 | {\r | |
672 | EFI_STATUS Status;\r | |
673 | DISK_IO_PRIVATE_DATA *Private;\r | |
674 | EFI_BLOCK_IO_PROTOCOL *BlockIo;\r | |
675 | EFI_BLOCK_IO_MEDIA *Media;\r | |
676 | UINT32 BlockSize;\r | |
677 | UINT64 Lba;\r | |
678 | UINT64 OverRunLba;\r | |
679 | UINT32 UnderRun;\r | |
680 | UINT32 OverRun;\r | |
681 | BOOLEAN TransactionComplete;\r | |
682 | UINTN WorkingBufferSize;\r | |
683 | UINT8 *WorkingBuffer;\r | |
684 | UINTN Length;\r | |
685 | UINT8 *Data;\r | |
686 | UINT8 *PreData;\r | |
687 | UINTN IsBufferAligned;\r | |
688 | UINTN DataBufferSize;\r | |
689 | BOOLEAN LastWrite;\r | |
690 | \r | |
691 | DEBUG ((EFI_D_ERROR, "DiskIoWriteDisk\n"));\r | |
692 | \r | |
693 | Private = DISK_IO_PRIVATE_DATA_FROM_THIS (This);\r | |
694 | \r | |
695 | BlockIo = Private->BlockIo;\r | |
696 | Media = BlockIo->Media;\r | |
697 | BlockSize = Media->BlockSize;\r | |
698 | \r | |
699 | if (Media->ReadOnly) {\r | |
700 | return EFI_WRITE_PROTECTED;\r | |
701 | }\r | |
702 | \r | |
703 | if (Media->MediaId != MediaId) {\r | |
704 | return EFI_MEDIA_CHANGED;\r | |
705 | }\r | |
706 | \r | |
707 | DataBufferSize = BlockSize * DATA_BUFFER_BLOCK_NUM;\r | |
708 | \r | |
709 | if (Media->IoAlign > 1) {\r | |
710 | PreData = AllocatePool (DataBufferSize + Media->IoAlign);\r | |
711 | Data = PreData - ((UINTN) PreData & (Media->IoAlign - 1)) + Media->IoAlign;\r | |
712 | } else {\r | |
713 | PreData = AllocatePool (DataBufferSize);\r | |
714 | Data = PreData;\r | |
715 | }\r | |
716 | \r | |
717 | if (PreData == NULL) {\r | |
718 | return EFI_OUT_OF_RESOURCES;\r | |
719 | }\r | |
720 | \r | |
721 | WorkingBuffer = Buffer;\r | |
722 | WorkingBufferSize = BufferSize;\r | |
723 | \r | |
724 | Lba = DivU64x32Remainder (Offset, BlockSize, &UnderRun);\r | |
725 | \r | |
726 | Length = BlockSize - UnderRun;\r | |
727 | TransactionComplete = FALSE;\r | |
728 | \r | |
729 | Status = EFI_SUCCESS;\r | |
730 | if (UnderRun != 0) {\r | |
731 | //\r | |
732 | // Offset starts in the middle of an Lba, so do read modify write.\r | |
733 | //\r | |
734 | Status = BlockIo->ReadBlocks (\r | |
735 | BlockIo,\r | |
736 | MediaId,\r | |
737 | Lba,\r | |
738 | BlockSize,\r | |
739 | Data\r | |
740 | );\r | |
741 | \r | |
742 | if (EFI_ERROR (Status)) {\r | |
743 | goto Done;\r | |
744 | }\r | |
745 | \r | |
746 | if (Length > BufferSize) {\r | |
747 | Length = BufferSize;\r | |
748 | TransactionComplete = TRUE;\r | |
749 | }\r | |
750 | \r | |
751 | CopyMem (Data + UnderRun, WorkingBuffer, Length);\r | |
752 | \r | |
753 | Status = BlockIo->WriteBlocks (\r | |
754 | BlockIo,\r | |
755 | MediaId,\r | |
756 | Lba,\r | |
757 | BlockSize,\r | |
758 | Data\r | |
759 | );\r | |
760 | if (EFI_ERROR (Status)) {\r | |
761 | goto Done;\r | |
762 | }\r | |
763 | \r | |
764 | WorkingBuffer += Length;\r | |
765 | WorkingBufferSize -= Length;\r | |
766 | if (WorkingBufferSize == 0) {\r | |
767 | goto Done;\r | |
768 | }\r | |
769 | \r | |
770 | Lba += 1;\r | |
771 | }\r | |
772 | \r | |
773 | OverRunLba = Lba + DivU64x32Remainder (WorkingBufferSize, BlockSize, &OverRun);\r | |
774 | \r | |
775 | if (!TransactionComplete && WorkingBufferSize >= BlockSize) {\r | |
776 | //\r | |
777 | // If the DiskIo maps directly to a BlockIo device do the write.\r | |
778 | //\r | |
779 | if (OverRun != 0) {\r | |
780 | WorkingBufferSize -= OverRun;\r | |
781 | }\r | |
782 | //\r | |
783 | // Check buffer alignment\r | |
784 | //\r | |
785 | IsBufferAligned = (UINTN) WorkingBuffer & (UINTN) (Media->IoAlign - 1);\r | |
786 | \r | |
787 | if (Media->IoAlign <= 1 || IsBufferAligned == 0) {\r | |
788 | //\r | |
789 | // Alignment is satisfied, so write them together\r | |
790 | //\r | |
791 | Status = BlockIo->WriteBlocks (\r | |
792 | BlockIo,\r | |
793 | MediaId,\r | |
794 | Lba,\r | |
795 | WorkingBufferSize,\r | |
796 | WorkingBuffer\r | |
797 | );\r | |
798 | \r | |
799 | if (EFI_ERROR (Status)) {\r | |
800 | goto Done;\r | |
801 | }\r | |
802 | \r | |
803 | WorkingBuffer += WorkingBufferSize;\r | |
804 | \r | |
805 | } else {\r | |
806 | //\r | |
807 | // The buffer parameter is not aligned with the request\r | |
808 | // So use the allocated instead.\r | |
809 | // It can fit almost all the cases.\r | |
810 | //\r | |
811 | LastWrite = FALSE;\r | |
812 | do {\r | |
813 | if (WorkingBufferSize <= DataBufferSize) {\r | |
814 | //\r | |
815 | // It is the last calling to writeblocks in this loop\r | |
816 | //\r | |
817 | DataBufferSize = WorkingBufferSize;\r | |
818 | LastWrite = TRUE;\r | |
819 | }\r | |
820 | \r | |
821 | CopyMem (Data, WorkingBuffer, DataBufferSize);\r | |
822 | Status = BlockIo->WriteBlocks (\r | |
823 | BlockIo,\r | |
824 | MediaId,\r | |
825 | Lba,\r | |
826 | DataBufferSize,\r | |
827 | Data\r | |
828 | );\r | |
829 | if (EFI_ERROR (Status)) {\r | |
830 | goto Done;\r | |
831 | }\r | |
832 | \r | |
833 | WorkingBufferSize -= DataBufferSize;\r | |
834 | WorkingBuffer += DataBufferSize;\r | |
835 | Lba += DATA_BUFFER_BLOCK_NUM;\r | |
836 | } while (!LastWrite);\r | |
837 | }\r | |
838 | }\r | |
839 | \r | |
840 | if (!TransactionComplete && OverRun != 0) {\r | |
841 | //\r | |
842 | // Last bit is not a complete block, so do a read modify write.\r | |
843 | //\r | |
844 | Status = BlockIo->ReadBlocks (\r | |
845 | BlockIo,\r | |
846 | MediaId,\r | |
847 | OverRunLba,\r | |
848 | BlockSize,\r | |
849 | Data\r | |
850 | );\r | |
851 | \r | |
852 | if (EFI_ERROR (Status)) {\r | |
853 | goto Done;\r | |
854 | }\r | |
855 | \r | |
856 | CopyMem (Data, WorkingBuffer, OverRun);\r | |
857 | \r | |
858 | Status = BlockIo->WriteBlocks (\r | |
859 | BlockIo,\r | |
860 | MediaId,\r | |
861 | OverRunLba,\r | |
862 | BlockSize,\r | |
863 | Data\r | |
864 | );\r | |
865 | if (EFI_ERROR (Status)) {\r | |
866 | goto Done;\r | |
867 | }\r | |
868 | }\r | |
869 | \r | |
870 | Done:\r | |
871 | if (PreData != NULL) {\r | |
872 | gBS->FreePool (PreData);\r | |
873 | }\r | |
874 | \r | |
875 | return Status;\r | |
876 | }\r |