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
|
/*-
* 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_MEMZONE_H_
#define _RTE_MEMZONE_H_
/**
* @file
* RTE Memzone
*
* The goal of the memzone allocator is to reserve contiguous
* portions of physical memory. These zones are identified by a name.
*
* The memzone descriptors are shared by all partitions and are
* located in a known place of physical memory. This zone is accessed
* using rte_eal_get_configuration(). The lookup (by name) of a
* memory zone can be done in any partition and returns the same
* physical address.
*
* A reserved memory zone cannot be unreserved. The reservation shall
* be done at initialization time only.
*/
#include <stdio.h>
#include <rte_memory.h>
#ifdef __cplusplus
extern "C" {
#endif
#define RTE_MEMZONE_2MB 0x00000001 /**< Use 2MB pages. */
#define RTE_MEMZONE_1GB 0x00000002 /**< Use 1GB pages. */
#define RTE_MEMZONE_16MB 0x00000100 /**< Use 16MB pages. */
#define RTE_MEMZONE_16GB 0x00000200 /**< Use 16GB pages. */
#define RTE_MEMZONE_256KB 0x00010000 /**< Use 256KB pages. */
#define RTE_MEMZONE_256MB 0x00020000 /**< Use 256MB pages. */
#define RTE_MEMZONE_512MB 0x00040000 /**< Use 512MB pages. */
#define RTE_MEMZONE_4GB 0x00080000 /**< Use 4GB pages. */
#define RTE_MEMZONE_SIZE_HINT_ONLY 0x00000004 /**< Use available page size */
/**
* A structure describing a memzone, which is a contiguous portion of
* physical memory identified by a name.
*/
struct rte_memzone {
#define RTE_MEMZONE_NAMESIZE 32 /**< Maximum length of memory zone name.*/
char name[RTE_MEMZONE_NAMESIZE]; /**< Name of the memory zone. */
phys_addr_t phys_addr; /**< Start physical address. */
union {
void *addr; /**< Start virtual address. */
uint64_t addr_64; /**< Makes sure addr is always 64-bits */
};
#ifdef RTE_LIBRTE_IVSHMEM
phys_addr_t ioremap_addr; /**< Real physical address inside the VM */
#endif
size_t len; /**< Length of the memzone. */
uint64_t hugepage_sz; /**< The page size of underlying memory */
int32_t socket_id; /**< NUMA socket ID. */
uint32_t flags; /**< Characteristics of this memzone. */
uint32_t memseg_id; /**< Memseg it belongs. */
} __attribute__((__packed__));
/**
* Reserve a portion of physical memory.
*
* This function reserves some memory and returns a pointer to a
* correctly filled memzone descriptor. If the allocation cannot be
* done, return NULL.
*
* @param name
* The name of the memzone. If it already exists, the function will
* fail and return NULL.
* @param len
* The size of the memory to be reserved. If it
* is 0, the biggest contiguous zone will be reserved.
* @param socket_id
* The socket identifier in the case of
* NUMA. The value can be SOCKET_ID_ANY if there is no NUMA
* constraint for the reserved zone.
* @param flags
* The flags parameter is used to request memzones to be
* taken from specifically sized hugepages.
* - RTE_MEMZONE_2MB - Reserved from 2MB pages
* - RTE_MEMZONE_1GB - Reserved from 1GB pages
* - RTE_MEMZONE_16MB - Reserved from 16MB pages
* - RTE_MEMZONE_16GB - Reserved from 16GB pages
* - RTE_MEMZONE_256KB - Reserved from 256KB pages
* - RTE_MEMZONE_256MB - Reserved from 256MB pages
* - RTE_MEMZONE_512MB - Reserved from 512MB pages
* - RTE_MEMZONE_4GB - Reserved from 4GB pages
* - RTE_MEMZONE_SIZE_HINT_ONLY - Allow alternative page size to be used if
* the requested page size is unavailable.
* If this flag is not set, the function
* will return error on an unavailable size
* request.
* @return
* A pointer to a correctly-filled read-only memzone descriptor, or NULL
* on error.
* On error case, rte_errno will be set appropriately:
* - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
* - E_RTE_SECONDARY - function was called from a secondary process instance
* - ENOSPC - the maximum number of memzones has already been allocated
* - EEXIST - a memzone with the same name already exists
* - ENOMEM - no appropriate memory area found in which to create memzone
* - EINVAL - invalid parameters
*/
const struct rte_memzone *rte_memzone_reserve(const char *name,
size_t len, int socket_id,
unsigned flags);
/**
* Reserve a portion of physical memory with alignment on a specified
* boundary.
*
* This function reserves some memory with alignment on a specified
* boundary, and returns a pointer to a correctly filled memzone
* descriptor. If the allocation cannot be done or if the alignment
* is not a power of 2, returns NULL.
*
* @param name
* The name of the memzone. If it already exists, the function will
* fail and return NULL.
* @param len
* The size of the memory to be reserved. If it
* is 0, the biggest contiguous zone will be reserved.
* @param socket_id
* The socket identifier in the case of
* NUMA. The value can be SOCKET_ID_ANY if there is no NUMA
* constraint for the reserved zone.
* @param flags
* The flags parameter is used to request memzones to be
* taken from specifically sized hugepages.
* - RTE_MEMZONE_2MB - Reserved from 2MB pages
* - RTE_MEMZONE_1GB - Reserved from 1GB pages
* - RTE_MEMZONE_16MB - Reserved from 16MB pages
* - RTE_MEMZONE_16GB - Reserved from 16GB pages
* - RTE_MEMZONE_256KB - Reserved from 256KB pages
* - RTE_MEMZONE_256MB - Reserved from 256MB pages
* - RTE_MEMZONE_512MB - Reserved from 512MB pages
* - RTE_MEMZONE_4GB - Reserved from 4GB pages
* - RTE_MEMZONE_SIZE_HINT_ONLY - Allow alternative page size to be used if
* the requested page size is unavailable.
* If this flag is not set, the function
* will return error on an unavailable size
* request.
* @param align
* Alignment for resulting memzone. Must be a power of 2.
* @return
* A pointer to a correctly-filled read-only memzone descriptor, or NULL
* on error.
* On error case, rte_errno will be set appropriately:
* - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
* - E_RTE_SECONDARY - function was called from a secondary process instance
* - ENOSPC - the maximum number of memzones has already been allocated
* - EEXIST - a memzone with the same name already exists
* - ENOMEM - no appropriate memory area found in which to create memzone
* - EINVAL - invalid parameters
*/
const struct rte_memzone *rte_memzone_reserve_aligned(const char *name,
size_t len, int socket_id,
unsigned flags, unsigned align);
/**
* Reserve a portion of physical memory with specified alignment and
* boundary.
*
* This function reserves some memory with specified alignment and
* boundary, and returns a pointer to a correctly filled memzone
* descriptor. If the allocation cannot be done or if the alignment
* or boundary are not a power of 2, returns NULL.
* Memory buffer is reserved in a way, that it wouldn't cross specified
* boundary. That implies that requested length should be less or equal
* then boundary.
*
* @param name
* The name of the memzone. If it already exists, the function will
* fail and return NULL.
* @param len
* The size of the memory to be reserved. If it
* is 0, the biggest contiguous zone will be reserved.
* @param socket_id
* The socket identifier in the case of
* NUMA. The value can be SOCKET_ID_ANY if there is no NUMA
* constraint for the reserved zone.
* @param flags
* The flags parameter is used to request memzones to be
* taken from specifically sized hugepages.
* - RTE_MEMZONE_2MB - Reserved from 2MB pages
* - RTE_MEMZONE_1GB - Reserved from 1GB pages
* - RTE_MEMZONE_16MB - Reserved from 16MB pages
* - RTE_MEMZONE_16GB - Reserved from 16GB pages
* - RTE_MEMZONE_256KB - Reserved from 256KB pages
* - RTE_MEMZONE_256MB - Reserved from 256MB pages
* - RTE_MEMZONE_512MB - Reserved from 512MB pages
* - RTE_MEMZONE_4GB - Reserved from 4GB pages
* - RTE_MEMZONE_SIZE_HINT_ONLY - Allow alternative page size to be used if
* the requested page size is unavailable.
* If this flag is not set, the function
* will return error on an unavailable size
* request.
* @param align
* Alignment for resulting memzone. Must be a power of 2.
* @param bound
* Boundary for resulting memzone. Must be a power of 2 or zero.
* Zero value implies no boundary condition.
* @return
* A pointer to a correctly-filled read-only memzone descriptor, or NULL
* on error.
* On error case, rte_errno will be set appropriately:
* - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
* - E_RTE_SECONDARY - function was called from a secondary process instance
* - ENOSPC - the maximum number of memzones has already been allocated
* - EEXIST - a memzone with the same name already exists
* - ENOMEM - no appropriate memory area found in which to create memzone
* - EINVAL - invalid parameters
*/
const struct rte_memzone *rte_memzone_reserve_bounded(const char *name,
size_t len, int socket_id,
unsigned flags, unsigned align, unsigned bound);
/**
* Free a memzone.
*
* Note: an IVSHMEM zone cannot be freed.
*
* @param mz
* A pointer to the memzone
* @return
* -EINVAL - invalid parameter, IVSHMEM memzone.
* 0 - success
*/
int rte_memzone_free(const struct rte_memzone *mz);
/**
* Lookup for a memzone.
*
* Get a pointer to a descriptor of an already reserved memory
* zone identified by the name given as an argument.
*
* @param name
* The name of the memzone.
* @return
* A pointer to a read-only memzone descriptor.
*/
const struct rte_memzone *rte_memzone_lookup(const char *name);
/**
* Dump all reserved memzones to the console.
*
* @param f
* A pointer to a file for output
*/
void rte_memzone_dump(FILE *f);
/**
* Walk list of all memzones
*
* @param func
* Iterator function
* @param arg
* Argument passed to iterator
*/
void rte_memzone_walk(void (*func)(const struct rte_memzone *, void *arg),
void *arg);
#ifdef __cplusplus
}
#endif
#endif /* _RTE_MEMZONE_H_ */
|
