aboutsummaryrefslogtreecommitdiffstats
path: root/lib/librte_eal/common/include/rte_malloc.h
blob: 74bb78c7c2f0c74cebeef853bd373de742937ef3 (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
/*-
 *   BSD LICENSE
 *
 *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *     * Neither the name of Intel Corporation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _RTE_MALLOC_H_
#define _RTE_MALLOC_H_

/**
 * @file
 * RTE Malloc. This library provides methods for dynamically allocating memory
 * from hugepages.
 */

#include <stdio.h>
#include <stddef.h>
#include <rte_memory.h>

#ifdef __cplusplus
extern "C" {
#endif

/**
 *  Structure to hold heap statistics obtained from rte_malloc_get_socket_stats function.
 */
struct rte_malloc_socket_stats {
	size_t heap_totalsz_bytes; /**< Total bytes on heap */
	size_t heap_freesz_bytes;  /**< Total free bytes on heap */
	size_t greatest_free_size; /**< Size in bytes of largest free block */
	unsigned free_count;       /**< Number of free elements on heap */
	unsigned alloc_count;      /**< Number of allocated elements on heap */
	size_t heap_allocsz_bytes; /**< Total allocated bytes on heap */
};

/**
 * This function allocates memory from the huge-page area of memory. The memory
 * is not cleared. In NUMA systems, the memory allocated resides on the same
 * NUMA socket as the core that calls this function.
 *
 * @param type
 *   A string identifying the type of allocated objects (useful for debug
 *   purposes, such as identifying the cause of a memory leak). Can be NULL.
 * @param size
 *   Size (in bytes) to be allocated.
 * @param align
 *   If 0, the return is a pointer that is suitably aligned for any kind of
 *   variable (in the same manner as malloc()).
 *   Otherwise, the return is a pointer that is a multiple of *align*. In
 *   this case, it must be a power of two. (Minimum alignment is the
 *   cacheline size, i.e. 64-bytes)
 * @return
 *   - NULL on error. Not enough memory, or invalid arguments (size is 0,
 *     align is not a power of two).
 *   - Otherwise, the pointer to the allocated object.
 */
void *
rte_malloc(const char *type, size_t size, unsigned align);

/**
 * Allocate zero'ed memory from the heap.
 *
 * Equivalent to rte_malloc() except that the memory zone is
 * initialised with zeros. In NUMA systems, the memory allocated resides on the
 * same NUMA socket as the core that calls this function.
 *
 * @param type
 *   A string identifying the type of allocated objects (useful for debug
 *   purposes, such as identifying the cause of a memory leak). Can be NULL.
 * @param size
 *   Size (in bytes) to be allocated.
 * @param align
 *   If 0, the return is a pointer that is suitably aligned for any kind of
 *   variable (in the same manner as malloc()).
 *   Otherwise, the return is a pointer that is a multiple of *align*. In
 *   this case, it must obviously be a power of two. (Minimum alignment is the
 *   cacheline size, i.e. 64-bytes)
 * @return
 *   - NULL on error. Not enough memory, or invalid arguments (size is 0,
 *     align is not a power of two).
 *   - Otherwise, the pointer to the allocated object.
 */
void *
rte_zmalloc(const char *type, size_t size, unsigned align);

/**
 * Replacement function for calloc(), using huge-page memory. Memory area is
 * initialised with zeros. In NUMA systems, the memory allocated resides on the
 * same NUMA socket as the core that calls this function.
 *
 * @param type
 *   A string identifying the type of allocated objects (useful for debug
 *   purposes, such as identifying the cause of a memory leak). Can be NULL.
 * @param num
 *   Number of elements to be allocated.
 * @param size
 *   Size (in bytes) of a single element.
 * @param align
 *   If 0, the return is a pointer that is suitably aligned for any kind of
 *   variable (in the same manner as malloc()).
 *   Otherwise, the return is a pointer that is a multiple of *align*. In
 *   this case, it must obviously be a power of two. (Minimum alignment is the
 *   cacheline size, i.e. 64-bytes)
 * @return
 *   - NULL on error. Not enough memory, or invalid arguments (size is 0,
 *     align is not a power of two).
 *   - Otherwise, the pointer to the allocated object.
 */
void *
rte_calloc(const char *type, size_t num, size_t size, unsigned align);

/**
 * Replacement function for realloc(), using huge-page memory. Reserved area
 * memory is resized, preserving contents. In NUMA systems, the new area
 * resides on the same NUMA socket as the old area.
 *
 * @param ptr
 *   Pointer to already allocated memory
 * @param size
 *   Size (in bytes) of new area. If this is 0, memory is freed.
 * @param align
 *   If 0, the return is a pointer that is suitably aligned for any kind of
 *   variable (in the same manner as malloc()).
 *   Otherwise, the return is a pointer that is a multiple of *align*. In
 *   this case, it must obviously be a power of two. (Minimum alignment is the
 *   cacheline size, i.e. 64-bytes)
 * @return
 *   - NULL on error. Not enough memory, or invalid arguments (size is 0,
 *     align is not a power of two).
 *   - Otherwise, the pointer to the reallocated memory.
 */
void *
rte_realloc(void *ptr, size_t size, unsigned align);

/**
 * This function allocates memory from the huge-page area of memory. The memory
 * is not cleared.
 *
 * @param type
 *   A string identifying the type of allocated objects (useful for debug
 *   purposes, such as identifying the cause of a memory leak). Can be NULL.
 * @param size
 *   Size (in bytes) to be allocated.
 * @param align
 *   If 0, the return is a pointer that is suitably aligned for any kind of
 *   variable (in the same manner as malloc()).
 *   Otherwise, the return is a pointer that is a multiple of *align*. In
 *   this case, it must be a power of two. (Minimum alignment is the
 *   cacheline size, i.e. 64-bytes)
 * @param socket
 *   NUMA socket to allocate memory on. If SOCKET_ID_ANY is used, this function
 *   will behave the same as rte_malloc().
 * @return
 *   - NULL on error. Not enough memory, or invalid arguments (size is 0,
 *     align is not a power of two).
 *   - Otherwise, the pointer to the allocated object.
 */
void *
rte_malloc_socket(const char *type, size_t size, unsigned align, int socket);

/**
 * Allocate zero'ed memory from the heap.
 *
 * Equivalent to rte_malloc() except that the memory zone is
 * initialised with zeros.
 *
 * @param type
 *   A string identifying the type of allocated objects (useful for debug
 *   purposes, such as identifying the cause of a memory leak). Can be NULL.
 * @param size
 *   Size (in bytes) to be allocated.
 * @param align
 *   If 0, the return is a pointer that is suitably aligned for any kind of
 *   variable (in the same manner as malloc()).
 *   Otherwise, the return is a pointer that is a multiple of *align*. In
 *   this case, it must obviously be a power of two. (Minimum alignment is the
 *   cacheline size, i.e. 64-bytes)
 * @param socket
 *   NUMA socket to allocate memory on. If SOCKET_ID_ANY is used, this function
 *   will behave the same as rte_zmalloc().
 * @return
 *   - NULL on error. Not enough memory, or invalid arguments (size is 0,
 *     align is not a power of two).
 *   - Otherwise, the pointer to the allocated object.
 */
void *
rte_zmalloc_socket(const char *type, size_t size, unsigned align, int socket);

/**
 * Replacement function for calloc(), using huge-page memory. Memory area is
 * initialised with zeros.
 *
 * @param type
 *   A string identifying the type of allocated objects (useful for debug
 *   purposes, such as identifying the cause of a memory leak). Can be NULL.
 * @param num
 *   Number of elements to be allocated.
 * @param size
 *   Size (in bytes) of a single element.
 * @param align
 *   If 0, the return is a pointer that is suitably aligned for any kind of
 *   variable (in the same manner as malloc()).
 *   Otherwise, the return is a pointer that is a multiple of *align*. In
 *   this case, it must obviously be a power of two. (Minimum alignment is the
 *   cacheline size, i.e. 64-bytes)
 * @param socket
 *   NUMA socket to allocate memory on. If SOCKET_ID_ANY is used, this function
 *   will behave the same as rte_calloc().
 * @return
 *   - NULL on error. Not enough memory, or invalid arguments (size is 0,
 *     align is not a power of two).
 *   - Otherwise, the pointer to the allocated object.
 */
void *
rte_calloc_socket(const char *type, size_t num, size_t size, unsigned align, int socket);

/**
 * Frees the memory space pointed to by the provided pointer.
 *
 * This pointer must have been returned by a previous call to
 * rte_malloc(), rte_zmalloc(), rte_calloc() or rte_realloc(). The behaviour of
 * rte_free() is undefined if the pointer does not match this requirement.
 *
 * If the pointer is NULL, the function does nothing.
 *
 * @param ptr
 *   The pointer to memory to be freed.
 */
void
rte_free(void *ptr);

/**
 * If malloc debug is enabled, check a memory block for header
 * and trailer markers to indicate that all is well with the block.
 * If size is non-null, also return the size of the block.
 *
 * @param ptr
 *   pointer to the start of a data block, must have been returned
 *   by a previous call to rte_malloc(), rte_zmalloc(), rte_calloc()
 *   or rte_realloc()
 * @param size
 *   if non-null, and memory block pointer is valid, returns the size
 *   of the memory block
 * @return
 *   -1 on error, invalid pointer passed or header and trailer markers
 *   are missing or corrupted
 *   0 on success
 */
int
rte_malloc_validate(const void *ptr, size_t *size);

/**
 * Get heap statistics for the specified heap.
 *
 * @param socket
 *   An unsigned integer specifying the socket to get heap statistics for
 * @param socket_stats
 *   A structure which provides memory to store statistics
 * @return
 *   Null on error
 *   Pointer to structure storing statistics on success
 */
int
rte_malloc_get_socket_stats(int socket,
		struct rte_malloc_socket_stats *socket_stats);

/**
 * Dump statistics.
 *
 * Dump for the specified type to the console. If the type argument is
 * NULL, all memory types will be dumped.
 *
 * @param f
 *   A pointer to a file for output
 * @param type
 *   A string identifying the type of objects to dump, or NULL
 *   to dump all objects.
 */
void
rte_malloc_dump_stats(FILE *f, const char *type);

/**
 * Set the maximum amount of allocated memory for this type.
 *
 * This is not yet implemented
 *
 * @param type
 *   A string identifying the type of allocated objects.
 * @param max
 *   The maximum amount of allocated bytes for this type.
 * @return
 *   - 0: Success.
 *   - (-1): Error.
 */
int
rte_malloc_set_limit(const char *type, size_t max);

/**
 * Return the physical address of a virtual address obtained through
 * rte_malloc
 *
 * @param addr
 *   Adress obtained from a previous rte_malloc call
 * @return
 *   NULL on error
 *   otherwise return physical address of the buffer
 */
phys_addr_t
rte_malloc_virt2phy(const void *addr);

#ifdef __cplusplus
}
#endif

#endif /* _RTE_MALLOC_H_ */