summaryrefslogtreecommitdiffstats
path: root/drivers/acpi/acpica/utalloc.c
blob: d64da4d9e8d06225b73344ba1eeffb6db2460354 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
 *
 * Module Name: utalloc - local memory allocation routines
 *
 * Copyright (C) 2000 - 2019, Intel Corp.
 *
 *****************************************************************************/

#include <acpi/acpi.h>
#include "accommon.h"
#include "acdebug.h"

#define _COMPONENT          ACPI_UTILITIES
ACPI_MODULE_NAME("utalloc")

#if !defined (USE_NATIVE_ALLOCATE_ZEROED)
/*******************************************************************************
 *
 * FUNCTION:    acpi_os_allocate_zeroed
 *
 * PARAMETERS:  size                - Size of the allocation
 *
 * RETURN:      Address of the allocated memory on success, NULL on failure.
 *
 * DESCRIPTION: Subsystem equivalent of calloc. Allocate and zero memory.
 *              This is the default implementation. Can be overridden via the
 *              USE_NATIVE_ALLOCATE_ZEROED flag.
 *
 ******************************************************************************/
void *acpi_os_allocate_zeroed(acpi_size size)
{
	void *allocation;

	ACPI_FUNCTION_ENTRY();

	allocation = acpi_os_allocate(size);
	if (allocation) {

		/* Clear the memory block */

		memset(allocation, 0, size);
	}

	return (allocation);
}

#endif				/* !USE_NATIVE_ALLOCATE_ZEROED */

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_create_caches
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Create all local caches
 *
 ******************************************************************************/

acpi_status acpi_ut_create_caches(void)
{
	acpi_status status;

	/* Object Caches, for frequently used objects */

	status =
	    acpi_os_create_cache("Acpi-Namespace",
				 sizeof(struct acpi_namespace_node),
				 ACPI_MAX_NAMESPACE_CACHE_DEPTH,
				 &acpi_gbl_namespace_cache);
	if (ACPI_FAILURE(status)) {
		return (status);
	}

	status =
	    acpi_os_create_cache("Acpi-State", sizeof(union acpi_generic_state),
				 ACPI_MAX_STATE_CACHE_DEPTH,
				 &acpi_gbl_state_cache);
	if (ACPI_FAILURE(status)) {
		return (status);
	}

	status =
	    acpi_os_create_cache("Acpi-Parse",
				 sizeof(struct acpi_parse_obj_common),
				 ACPI_MAX_PARSE_CACHE_DEPTH,
				 &acpi_gbl_ps_node_cache);
	if (ACPI_FAILURE(status)) {
		return (status);
	}

	status =
	    acpi_os_create_cache("Acpi-ParseExt",
				 sizeof(struct acpi_parse_obj_named),
				 ACPI_MAX_EXTPARSE_CACHE_DEPTH,
				 &acpi_gbl_ps_node_ext_cache);
	if (ACPI_FAILURE(status)) {
		return (status);
	}

	status =
	    acpi_os_create_cache("Acpi-Operand",
				 sizeof(union acpi_operand_object),
				 ACPI_MAX_OBJECT_CACHE_DEPTH,
				 &acpi_gbl_operand_cache);
	if (ACPI_FAILURE(status)) {
		return (status);
	}
#ifdef ACPI_ASL_COMPILER
	/*
	 * For use with the ASL-/ASL+ option. This cache keeps track of regular
	 * 0xA9 0x01 comments.
	 */
	status =
	    acpi_os_create_cache("Acpi-Comment",
				 sizeof(struct acpi_comment_node),
				 ACPI_MAX_COMMENT_CACHE_DEPTH,
				 &acpi_gbl_reg_comment_cache);
	if (ACPI_FAILURE(status)) {
		return (status);
	}

	/*
	 * This cache keeps track of the starting addresses of where the comments
	 * lie. This helps prevent duplication of comments.
	 */
	status =
	    acpi_os_create_cache("Acpi-Comment-Addr",
				 sizeof(struct acpi_comment_addr_node),
				 ACPI_MAX_COMMENT_CACHE_DEPTH,
				 &acpi_gbl_comment_addr_cache);
	if (ACPI_FAILURE(status)) {
		return (status);
	}

	/*
	 * This cache will be used for nodes that represent files.
	 */
	status =
	    acpi_os_create_cache("Acpi-File", sizeof(struct acpi_file_node),
				 ACPI_MAX_COMMENT_CACHE_DEPTH,
				 &acpi_gbl_file_cache);
	if (ACPI_FAILURE(status)) {
		return (status);
	}
#endif

#ifdef ACPI_DBG_TRACK_ALLOCATIONS

	/* Memory allocation lists */

	status = acpi_ut_create_list("Acpi-Global", 0, &acpi_gbl_global_list);
	if (ACPI_FAILURE(status)) {
		return (status);
	}

	status =
	    acpi_ut_create_list("Acpi-Namespace",
				sizeof(struct acpi_namespace_node),
				&acpi_gbl_ns_node_list);
	if (ACPI_FAILURE(status)) {
		return (status);
	}
#endif

	return (AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_delete_caches
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Purge and delete all local caches
 *
 ******************************************************************************/

acpi_status acpi_ut_delete_caches(void)
{
#ifdef ACPI_DBG_TRACK_ALLOCATIONS
	char buffer[7];

	if (acpi_gbl_display_final_mem_stats) {
		strcpy(buffer, "MEMORY");
		(void)acpi_db_display_statistics(buffer);
	}
#endif

	(void)acpi_os_delete_cache(acpi_gbl_namespace_cache);
	acpi_gbl_namespace_cache = NULL;

	(void)acpi_os_delete_cache(acpi_gbl_state_cache);
	acpi_gbl_state_cache = NULL;

	(void)acpi_os_delete_cache(acpi_gbl_operand_cache);
	acpi_gbl_operand_cache = NULL;

	(void)acpi_os_delete_cache(acpi_gbl_ps_node_cache);
	acpi_gbl_ps_node_cache = NULL;

	(void)acpi_os_delete_cache(acpi_gbl_ps_node_ext_cache);
	acpi_gbl_ps_node_ext_cache = NULL;

#ifdef ACPI_ASL_COMPILER
	(void)acpi_os_delete_cache(acpi_gbl_reg_comment_cache);
	acpi_gbl_reg_comment_cache = NULL;

	(void)acpi_os_delete_cache(acpi_gbl_comment_addr_cache);
	acpi_gbl_comment_addr_cache = NULL;

	(void)acpi_os_delete_cache(acpi_gbl_file_cache);
	acpi_gbl_file_cache = NULL;
#endif

#ifdef ACPI_DBG_TRACK_ALLOCATIONS

	/* Debug only - display leftover memory allocation, if any */

	acpi_ut_dump_allocations(ACPI_UINT32_MAX, NULL);

	/* Free memory lists */

	acpi_os_free(acpi_gbl_global_list);
	acpi_gbl_global_list = NULL;

	acpi_os_free(acpi_gbl_ns_node_list);
	acpi_gbl_ns_node_list = NULL;
#endif

	return (AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_validate_buffer
 *
 * PARAMETERS:  buffer              - Buffer descriptor to be validated
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Perform parameter validation checks on an struct acpi_buffer
 *
 ******************************************************************************/

acpi_status acpi_ut_validate_buffer(struct acpi_buffer *buffer)
{

	/* Obviously, the structure pointer must be valid */

	if (!buffer) {
		return (AE_BAD_PARAMETER);
	}

	/* Special semantics for the length */

	if ((buffer->length == ACPI_NO_BUFFER) ||
	    (buffer->length == ACPI_ALLOCATE_BUFFER) ||
	    (buffer->length == ACPI_ALLOCATE_LOCAL_BUFFER)) {
		return (AE_OK);
	}

	/* Length is valid, the buffer pointer must be also */

	if (!buffer->pointer) {
		return (AE_BAD_PARAMETER);
	}

	return (AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_initialize_buffer
 *
 * PARAMETERS:  buffer              - Buffer to be validated
 *              required_length     - Length needed
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Validate that the buffer is of the required length or
 *              allocate a new buffer. Returned buffer is always zeroed.
 *
 ******************************************************************************/

acpi_status
acpi_ut_initialize_buffer(struct acpi_buffer *buffer, acpi_size required_length)
{
	acpi_size input_buffer_length;

	/* Parameter validation */

	if (!buffer || !required_length) {
		return (AE_BAD_PARAMETER);
	}

	/*
	 * Buffer->Length is used as both an input and output parameter. Get the
	 * input actual length and set the output required buffer length.
	 */
	input_buffer_length = buffer->length;
	buffer->length = required_length;

	/*
	 * The input buffer length contains the actual buffer length, or the type
	 * of buffer to be allocated by this routine.
	 */
	switch (input_buffer_length) {
	case ACPI_NO_BUFFER:

		/* Return the exception (and the required buffer length) */

		return (AE_BUFFER_OVERFLOW);

	case ACPI_ALLOCATE_BUFFER:
		/*
		 * Allocate a new buffer. We directectly call acpi_os_allocate here to
		 * purposefully bypass the (optionally enabled) internal allocation
		 * tracking mechanism since we only want to track internal
		 * allocations. Note: The caller should use acpi_os_free to free this
		 * buffer created via ACPI_ALLOCATE_BUFFER.
		 */
		buffer->pointer = acpi_os_allocate(required_length);
		break;

	case ACPI_ALLOCATE_LOCAL_BUFFER:

		/* Allocate a new buffer with local interface to allow tracking */

		buffer->pointer = ACPI_ALLOCATE(required_length);
		break;

	default:

		/* Existing buffer: Validate the size of the buffer */

		if (input_buffer_length < required_length) {
			return (AE_BUFFER_OVERFLOW);
		}
		break;
	}

	/* Validate allocation from above or input buffer pointer */

	if (!buffer->pointer) {
		return (AE_NO_MEMORY);
	}

	/* Have a valid buffer, clear it */

	memset(buffer->pointer, 0, required_length);
	return (AE_OK);
}