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