1 /*******************************************************************************
2 *
3 * Module Name: rscreate - Create resource lists/tables
4 *
5 ******************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2014, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44 #include "acpi.h"
45 #include "accommon.h"
46 #include "acresrc.h"
47 #include "acnamesp.h"
48
49 #define _COMPONENT ACPI_RESOURCES
50 ACPI_MODULE_NAME ("rscreate")
51
52
53 /*******************************************************************************
54 *
55 * FUNCTION: AcpiBufferToResource
56 *
57 * PARAMETERS: AmlBuffer - Pointer to the resource byte stream
58 * AmlBufferLength - Length of the AmlBuffer
59 * ResourcePtr - Where the converted resource is returned
60 *
61 * RETURN: Status
62 *
63 * DESCRIPTION: Convert a raw AML buffer to a resource list
64 *
65 ******************************************************************************/
66
67 ACPI_STATUS
AcpiBufferToResource(UINT8 * AmlBuffer,UINT16 AmlBufferLength,ACPI_RESOURCE ** ResourcePtr)68 AcpiBufferToResource (
69 UINT8 *AmlBuffer,
70 UINT16 AmlBufferLength,
71 ACPI_RESOURCE **ResourcePtr)
72 {
73 ACPI_STATUS Status;
74 ACPI_SIZE ListSizeNeeded;
75 void *Resource;
76 void *CurrentResourcePtr;
77
78
79 ACPI_FUNCTION_TRACE (AcpiBufferToResource);
80
81
82 /*
83 * Note: we allow AE_AML_NO_RESOURCE_END_TAG, since an end tag
84 * is not required here.
85 */
86
87 /* Get the required length for the converted resource */
88
89 Status = AcpiRsGetListLength (AmlBuffer, AmlBufferLength,
90 &ListSizeNeeded);
91 if (Status == AE_AML_NO_RESOURCE_END_TAG)
92 {
93 Status = AE_OK;
94 }
95 if (ACPI_FAILURE (Status))
96 {
97 return_ACPI_STATUS (Status);
98 }
99
100 /* Allocate a buffer for the converted resource */
101
102 Resource = ACPI_ALLOCATE_ZEROED (ListSizeNeeded);
103 CurrentResourcePtr = Resource;
104 if (!Resource)
105 {
106 return_ACPI_STATUS (AE_NO_MEMORY);
107 }
108
109 /* Perform the AML-to-Resource conversion */
110
111 Status = AcpiUtWalkAmlResources (NULL, AmlBuffer, AmlBufferLength,
112 AcpiRsConvertAmlToResources, &CurrentResourcePtr);
113 if (Status == AE_AML_NO_RESOURCE_END_TAG)
114 {
115 Status = AE_OK;
116 }
117 if (ACPI_FAILURE (Status))
118 {
119 ACPI_FREE (Resource);
120 }
121 else
122 {
123 *ResourcePtr = Resource;
124 }
125
126 return_ACPI_STATUS (Status);
127 }
128
ACPI_EXPORT_SYMBOL(AcpiBufferToResource)129 ACPI_EXPORT_SYMBOL (AcpiBufferToResource)
130
131
132 /*******************************************************************************
133 *
134 * FUNCTION: AcpiRsCreateResourceList
135 *
136 * PARAMETERS: AmlBuffer - Pointer to the resource byte stream
137 * OutputBuffer - Pointer to the user's buffer
138 *
139 * RETURN: Status: AE_OK if okay, else a valid ACPI_STATUS code
140 * If OutputBuffer is not large enough, OutputBufferLength
141 * indicates how large OutputBuffer should be, else it
142 * indicates how may UINT8 elements of OutputBuffer are valid.
143 *
144 * DESCRIPTION: Takes the byte stream returned from a _CRS, _PRS control method
145 * execution and parses the stream to create a linked list
146 * of device resources.
147 *
148 ******************************************************************************/
149
150 ACPI_STATUS
151 AcpiRsCreateResourceList (
152 ACPI_OPERAND_OBJECT *AmlBuffer,
153 ACPI_BUFFER *OutputBuffer)
154 {
155
156 ACPI_STATUS Status;
157 UINT8 *AmlStart;
158 ACPI_SIZE ListSizeNeeded = 0;
159 UINT32 AmlBufferLength;
160 void *Resource;
161
162
163 ACPI_FUNCTION_TRACE (RsCreateResourceList);
164
165
166 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "AmlBuffer = %p\n",
167 AmlBuffer));
168
169 /* Params already validated, so we don't re-validate here */
170
171 AmlBufferLength = AmlBuffer->Buffer.Length;
172 AmlStart = AmlBuffer->Buffer.Pointer;
173
174 /*
175 * Pass the AmlBuffer into a module that can calculate
176 * the buffer size needed for the linked list
177 */
178 Status = AcpiRsGetListLength (AmlStart, AmlBufferLength,
179 &ListSizeNeeded);
180
181 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Status=%X ListSizeNeeded=%X\n",
182 Status, (UINT32) ListSizeNeeded));
183 if (ACPI_FAILURE (Status))
184 {
185 return_ACPI_STATUS (Status);
186 }
187
188 /* Validate/Allocate/Clear caller buffer */
189
190 Status = AcpiUtInitializeBuffer (OutputBuffer, ListSizeNeeded);
191 if (ACPI_FAILURE (Status))
192 {
193 return_ACPI_STATUS (Status);
194 }
195
196 /* Do the conversion */
197
198 Resource = OutputBuffer->Pointer;
199 Status = AcpiUtWalkAmlResources (NULL, AmlStart, AmlBufferLength,
200 AcpiRsConvertAmlToResources, &Resource);
201 if (ACPI_FAILURE (Status))
202 {
203 return_ACPI_STATUS (Status);
204 }
205
206 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "OutputBuffer %p Length %X\n",
207 OutputBuffer->Pointer, (UINT32) OutputBuffer->Length));
208 return_ACPI_STATUS (AE_OK);
209 }
210
211
212 /*******************************************************************************
213 *
214 * FUNCTION: AcpiRsCreatePciRoutingTable
215 *
216 * PARAMETERS: PackageObject - Pointer to a package containing one
217 * of more ACPI_OPERAND_OBJECTs
218 * OutputBuffer - Pointer to the user's buffer
219 *
220 * RETURN: Status AE_OK if okay, else a valid ACPI_STATUS code.
221 * If the OutputBuffer is too small, the error will be
222 * AE_BUFFER_OVERFLOW and OutputBuffer->Length will point
223 * to the size buffer needed.
224 *
225 * DESCRIPTION: Takes the ACPI_OPERAND_OBJECT package and creates a
226 * linked list of PCI interrupt descriptions
227 *
228 * NOTE: It is the caller's responsibility to ensure that the start of the
229 * output buffer is aligned properly (if necessary).
230 *
231 ******************************************************************************/
232
233 ACPI_STATUS
AcpiRsCreatePciRoutingTable(ACPI_OPERAND_OBJECT * PackageObject,ACPI_BUFFER * OutputBuffer)234 AcpiRsCreatePciRoutingTable (
235 ACPI_OPERAND_OBJECT *PackageObject,
236 ACPI_BUFFER *OutputBuffer)
237 {
238 UINT8 *Buffer;
239 ACPI_OPERAND_OBJECT **TopObjectList;
240 ACPI_OPERAND_OBJECT **SubObjectList;
241 ACPI_OPERAND_OBJECT *ObjDesc;
242 ACPI_SIZE BufferSizeNeeded = 0;
243 UINT32 NumberOfElements;
244 UINT32 Index;
245 ACPI_PCI_ROUTING_TABLE *UserPrt;
246 ACPI_NAMESPACE_NODE *Node;
247 ACPI_STATUS Status;
248 ACPI_BUFFER PathBuffer;
249
250
251 ACPI_FUNCTION_TRACE (RsCreatePciRoutingTable);
252
253
254 /* Params already validated, so we don't re-validate here */
255
256 /* Get the required buffer length */
257
258 Status = AcpiRsGetPciRoutingTableLength (PackageObject,
259 &BufferSizeNeeded);
260 if (ACPI_FAILURE (Status))
261 {
262 return_ACPI_STATUS (Status);
263 }
264
265 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "BufferSizeNeeded = %X\n",
266 (UINT32) BufferSizeNeeded));
267
268 /* Validate/Allocate/Clear caller buffer */
269
270 Status = AcpiUtInitializeBuffer (OutputBuffer, BufferSizeNeeded);
271 if (ACPI_FAILURE (Status))
272 {
273 return_ACPI_STATUS (Status);
274 }
275
276 /*
277 * Loop through the ACPI_INTERNAL_OBJECTS - Each object should be a
278 * package that in turn contains an UINT64 Address, a UINT8 Pin,
279 * a Name, and a UINT8 SourceIndex.
280 */
281 TopObjectList = PackageObject->Package.Elements;
282 NumberOfElements = PackageObject->Package.Count;
283 Buffer = OutputBuffer->Pointer;
284 UserPrt = ACPI_CAST_PTR (ACPI_PCI_ROUTING_TABLE, Buffer);
285
286 for (Index = 0; Index < NumberOfElements; Index++)
287 {
288 /*
289 * Point UserPrt past this current structure
290 *
291 * NOTE: On the first iteration, UserPrt->Length will
292 * be zero because we cleared the return buffer earlier
293 */
294 Buffer += UserPrt->Length;
295 UserPrt = ACPI_CAST_PTR (ACPI_PCI_ROUTING_TABLE, Buffer);
296
297 /*
298 * Fill in the Length field with the information we have at this point.
299 * The minus four is to subtract the size of the UINT8 Source[4] member
300 * because it is added below.
301 */
302 UserPrt->Length = (sizeof (ACPI_PCI_ROUTING_TABLE) - 4);
303
304 /* Each subpackage must be of length 4 */
305
306 if ((*TopObjectList)->Package.Count != 4)
307 {
308 ACPI_ERROR ((AE_INFO,
309 "(PRT[%u]) Need package of length 4, found length %u",
310 Index, (*TopObjectList)->Package.Count));
311 return_ACPI_STATUS (AE_AML_PACKAGE_LIMIT);
312 }
313
314 /*
315 * Dereference the subpackage.
316 * The SubObjectList will now point to an array of the four IRQ
317 * elements: [Address, Pin, Source, SourceIndex]
318 */
319 SubObjectList = (*TopObjectList)->Package.Elements;
320
321 /* 1) First subobject: Dereference the PRT.Address */
322
323 ObjDesc = SubObjectList[0];
324 if (!ObjDesc || ObjDesc->Common.Type != ACPI_TYPE_INTEGER)
325 {
326 ACPI_ERROR ((AE_INFO, "(PRT[%u].Address) Need Integer, found %s",
327 Index, AcpiUtGetObjectTypeName (ObjDesc)));
328 return_ACPI_STATUS (AE_BAD_DATA);
329 }
330
331 UserPrt->Address = ObjDesc->Integer.Value;
332
333 /* 2) Second subobject: Dereference the PRT.Pin */
334
335 ObjDesc = SubObjectList[1];
336 if (!ObjDesc || ObjDesc->Common.Type != ACPI_TYPE_INTEGER)
337 {
338 ACPI_ERROR ((AE_INFO, "(PRT[%u].Pin) Need Integer, found %s",
339 Index, AcpiUtGetObjectTypeName (ObjDesc)));
340 return_ACPI_STATUS (AE_BAD_DATA);
341 }
342
343 UserPrt->Pin = (UINT32) ObjDesc->Integer.Value;
344
345 /*
346 * 3) Third subobject: Dereference the PRT.SourceName
347 * The name may be unresolved (slack mode), so allow a null object
348 */
349 ObjDesc = SubObjectList[2];
350 if (ObjDesc)
351 {
352 switch (ObjDesc->Common.Type)
353 {
354 case ACPI_TYPE_LOCAL_REFERENCE:
355
356 if (ObjDesc->Reference.Class != ACPI_REFCLASS_NAME)
357 {
358 ACPI_ERROR ((AE_INFO,
359 "(PRT[%u].Source) Need name, found Reference Class 0x%X",
360 Index, ObjDesc->Reference.Class));
361 return_ACPI_STATUS (AE_BAD_DATA);
362 }
363
364 Node = ObjDesc->Reference.Node;
365
366 /* Use *remaining* length of the buffer as max for pathname */
367
368 PathBuffer.Length = OutputBuffer->Length -
369 (UINT32) ((UINT8 *) UserPrt->Source -
370 (UINT8 *) OutputBuffer->Pointer);
371 PathBuffer.Pointer = UserPrt->Source;
372
373 Status = AcpiNsHandleToPathname ((ACPI_HANDLE) Node, &PathBuffer);
374
375 /* +1 to include null terminator */
376
377 UserPrt->Length += (UINT32) ACPI_STRLEN (UserPrt->Source) + 1;
378 break;
379
380 case ACPI_TYPE_STRING:
381
382 ACPI_STRCPY (UserPrt->Source, ObjDesc->String.Pointer);
383
384 /*
385 * Add to the Length field the length of the string
386 * (add 1 for terminator)
387 */
388 UserPrt->Length += ObjDesc->String.Length + 1;
389 break;
390
391 case ACPI_TYPE_INTEGER:
392 /*
393 * If this is a number, then the Source Name is NULL, since the
394 * entire buffer was zeroed out, we can leave this alone.
395 *
396 * Add to the Length field the length of the UINT32 NULL
397 */
398 UserPrt->Length += sizeof (UINT32);
399 break;
400
401 default:
402
403 ACPI_ERROR ((AE_INFO,
404 "(PRT[%u].Source) Need Ref/String/Integer, found %s",
405 Index, AcpiUtGetObjectTypeName (ObjDesc)));
406 return_ACPI_STATUS (AE_BAD_DATA);
407 }
408 }
409
410 /* Now align the current length */
411
412 UserPrt->Length = (UINT32) ACPI_ROUND_UP_TO_64BIT (UserPrt->Length);
413
414 /* 4) Fourth subobject: Dereference the PRT.SourceIndex */
415
416 ObjDesc = SubObjectList[3];
417 if (!ObjDesc || ObjDesc->Common.Type != ACPI_TYPE_INTEGER)
418 {
419 ACPI_ERROR ((AE_INFO,
420 "(PRT[%u].SourceIndex) Need Integer, found %s",
421 Index, AcpiUtGetObjectTypeName (ObjDesc)));
422 return_ACPI_STATUS (AE_BAD_DATA);
423 }
424
425 UserPrt->SourceIndex = (UINT32) ObjDesc->Integer.Value;
426
427 /* Point to the next ACPI_OPERAND_OBJECT in the top level package */
428
429 TopObjectList++;
430 }
431
432 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "OutputBuffer %p Length %X\n",
433 OutputBuffer->Pointer, (UINT32) OutputBuffer->Length));
434 return_ACPI_STATUS (AE_OK);
435 }
436
437
438 /*******************************************************************************
439 *
440 * FUNCTION: AcpiRsCreateAmlResources
441 *
442 * PARAMETERS: ResourceList - Pointer to the resource list buffer
443 * OutputBuffer - Where the AML buffer is returned
444 *
445 * RETURN: Status AE_OK if okay, else a valid ACPI_STATUS code.
446 * If the OutputBuffer is too small, the error will be
447 * AE_BUFFER_OVERFLOW and OutputBuffer->Length will point
448 * to the size buffer needed.
449 *
450 * DESCRIPTION: Converts a list of device resources to an AML bytestream
451 * to be used as input for the _SRS control method.
452 *
453 ******************************************************************************/
454
455 ACPI_STATUS
AcpiRsCreateAmlResources(ACPI_BUFFER * ResourceList,ACPI_BUFFER * OutputBuffer)456 AcpiRsCreateAmlResources (
457 ACPI_BUFFER *ResourceList,
458 ACPI_BUFFER *OutputBuffer)
459 {
460 ACPI_STATUS Status;
461 ACPI_SIZE AmlSizeNeeded = 0;
462
463
464 ACPI_FUNCTION_TRACE (RsCreateAmlResources);
465
466
467 /* Params already validated, no need to re-validate here */
468
469 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "ResourceList Buffer = %p\n",
470 ResourceList->Pointer));
471
472 /* Get the buffer size needed for the AML byte stream */
473
474 Status = AcpiRsGetAmlLength (ResourceList->Pointer,
475 ResourceList->Length, &AmlSizeNeeded);
476
477 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "AmlSizeNeeded=%X, %s\n",
478 (UINT32) AmlSizeNeeded, AcpiFormatException (Status)));
479 if (ACPI_FAILURE (Status))
480 {
481 return_ACPI_STATUS (Status);
482 }
483
484 /* Validate/Allocate/Clear caller buffer */
485
486 Status = AcpiUtInitializeBuffer (OutputBuffer, AmlSizeNeeded);
487 if (ACPI_FAILURE (Status))
488 {
489 return_ACPI_STATUS (Status);
490 }
491
492 /* Do the conversion */
493
494 Status = AcpiRsConvertResourcesToAml (ResourceList->Pointer,
495 AmlSizeNeeded, OutputBuffer->Pointer);
496 if (ACPI_FAILURE (Status))
497 {
498 return_ACPI_STATUS (Status);
499 }
500
501 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "OutputBuffer %p Length %X\n",
502 OutputBuffer->Pointer, (UINT32) OutputBuffer->Length));
503 return_ACPI_STATUS (AE_OK);
504 }
505