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34 #ifndef _RTE_MEMZONE_H_
35 #define _RTE_MEMZONE_H_
41 * The goal of the memzone allocator is to reserve contiguous
42 * portions of physical memory. These zones are identified by a name.
44 * The memzone descriptors are shared by all partitions and are
45 * located in a known place of physical memory. This zone is accessed
46 * using rte_eal_get_configuration(). The lookup (by name) of a
47 * memory zone can be done in any partition and returns the same
50 * A reserved memory zone cannot be unreserved. The reservation shall
51 * be done at initialization time only.
55 #include <rte_memory.h>
56 #include <rte_common.h>
62 #define RTE_MEMZONE_2MB 0x00000001 /**< Use 2MB pages. */
63 #define RTE_MEMZONE_1GB 0x00000002 /**< Use 1GB pages. */
64 #define RTE_MEMZONE_16MB 0x00000100 /**< Use 16MB pages. */
65 #define RTE_MEMZONE_16GB 0x00000200 /**< Use 16GB pages. */
66 #define RTE_MEMZONE_256KB 0x00010000 /**< Use 256KB pages. */
67 #define RTE_MEMZONE_256MB 0x00020000 /**< Use 256MB pages. */
68 #define RTE_MEMZONE_512MB 0x00040000 /**< Use 512MB pages. */
69 #define RTE_MEMZONE_4GB 0x00080000 /**< Use 4GB pages. */
70 #define RTE_MEMZONE_SIZE_HINT_ONLY 0x00000004 /**< Use available page size */
73 * A structure describing a memzone, which is a contiguous portion of
74 * physical memory identified by a name.
78 #define RTE_MEMZONE_NAMESIZE 32 /**< Maximum length of memory zone name.*/
79 char name[RTE_MEMZONE_NAMESIZE]; /**< Name of the memory zone. */
81 phys_addr_t phys_addr; /**< Start physical address. */
84 void *addr; /**< Start virtual address. */
85 uint64_t addr_64; /**< Makes sure addr is always 64-bits */
87 size_t len; /**< Length of the memzone. */
89 uint64_t hugepage_sz; /**< The page size of underlying memory */
91 int32_t socket_id; /**< NUMA socket ID. */
93 uint32_t flags; /**< Characteristics of this memzone. */
94 uint32_t memseg_id; /**< Memseg it belongs. */
95 } __attribute__((__packed__));
98 * Reserve a portion of physical memory.
100 * This function reserves some memory and returns a pointer to a
101 * correctly filled memzone descriptor. If the allocation cannot be
105 * The name of the memzone. If it already exists, the function will
106 * fail and return NULL.
108 * The size of the memory to be reserved. If it
109 * is 0, the biggest contiguous zone will be reserved.
111 * The socket identifier in the case of
112 * NUMA. The value can be SOCKET_ID_ANY if there is no NUMA
113 * constraint for the reserved zone.
115 * The flags parameter is used to request memzones to be
116 * taken from specifically sized hugepages.
117 * - RTE_MEMZONE_2MB - Reserved from 2MB pages
118 * - RTE_MEMZONE_1GB - Reserved from 1GB pages
119 * - RTE_MEMZONE_16MB - Reserved from 16MB pages
120 * - RTE_MEMZONE_16GB - Reserved from 16GB pages
121 * - RTE_MEMZONE_256KB - Reserved from 256KB pages
122 * - RTE_MEMZONE_256MB - Reserved from 256MB pages
123 * - RTE_MEMZONE_512MB - Reserved from 512MB pages
124 * - RTE_MEMZONE_4GB - Reserved from 4GB pages
125 * - RTE_MEMZONE_SIZE_HINT_ONLY - Allow alternative page size to be used if
126 * the requested page size is unavailable.
127 * If this flag is not set, the function
128 * will return error on an unavailable size
131 * A pointer to a correctly-filled read-only memzone descriptor, or NULL
133 * On error case, rte_errno will be set appropriately:
134 * - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
135 * - E_RTE_SECONDARY - function was called from a secondary process instance
136 * - ENOSPC - the maximum number of memzones has already been allocated
137 * - EEXIST - a memzone with the same name already exists
138 * - ENOMEM - no appropriate memory area found in which to create memzone
139 * - EINVAL - invalid parameters
141 const struct rte_memzone *rte_memzone_reserve(const char *name,
142 size_t len, int socket_id,
146 * Reserve a portion of physical memory with alignment on a specified
149 * This function reserves some memory with alignment on a specified
150 * boundary, and returns a pointer to a correctly filled memzone
151 * descriptor. If the allocation cannot be done or if the alignment
152 * is not a power of 2, returns NULL.
155 * The name of the memzone. If it already exists, the function will
156 * fail and return NULL.
158 * The size of the memory to be reserved. If it
159 * is 0, the biggest contiguous zone will be reserved.
161 * The socket identifier in the case of
162 * NUMA. The value can be SOCKET_ID_ANY if there is no NUMA
163 * constraint for the reserved zone.
165 * The flags parameter is used to request memzones to be
166 * taken from specifically sized hugepages.
167 * - RTE_MEMZONE_2MB - Reserved from 2MB pages
168 * - RTE_MEMZONE_1GB - Reserved from 1GB pages
169 * - RTE_MEMZONE_16MB - Reserved from 16MB pages
170 * - RTE_MEMZONE_16GB - Reserved from 16GB pages
171 * - RTE_MEMZONE_256KB - Reserved from 256KB pages
172 * - RTE_MEMZONE_256MB - Reserved from 256MB pages
173 * - RTE_MEMZONE_512MB - Reserved from 512MB pages
174 * - RTE_MEMZONE_4GB - Reserved from 4GB pages
175 * - RTE_MEMZONE_SIZE_HINT_ONLY - Allow alternative page size to be used if
176 * the requested page size is unavailable.
177 * If this flag is not set, the function
178 * will return error on an unavailable size
181 * Alignment for resulting memzone. Must be a power of 2.
183 * A pointer to a correctly-filled read-only memzone descriptor, or NULL
185 * On error case, rte_errno will be set appropriately:
186 * - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
187 * - E_RTE_SECONDARY - function was called from a secondary process instance
188 * - ENOSPC - the maximum number of memzones has already been allocated
189 * - EEXIST - a memzone with the same name already exists
190 * - ENOMEM - no appropriate memory area found in which to create memzone
191 * - EINVAL - invalid parameters
193 const struct rte_memzone *rte_memzone_reserve_aligned(const char *name,
194 size_t len, int socket_id,
195 unsigned flags, unsigned align);
198 * Reserve a portion of physical memory with specified alignment and
201 * This function reserves some memory with specified alignment and
202 * boundary, and returns a pointer to a correctly filled memzone
203 * descriptor. If the allocation cannot be done or if the alignment
204 * or boundary are not a power of 2, returns NULL.
205 * Memory buffer is reserved in a way, that it wouldn't cross specified
206 * boundary. That implies that requested length should be less or equal
210 * The name of the memzone. If it already exists, the function will
211 * fail and return NULL.
213 * The size of the memory to be reserved. If it
214 * is 0, the biggest contiguous zone will be reserved.
216 * The socket identifier in the case of
217 * NUMA. The value can be SOCKET_ID_ANY if there is no NUMA
218 * constraint for the reserved zone.
220 * The flags parameter is used to request memzones to be
221 * taken from specifically sized hugepages.
222 * - RTE_MEMZONE_2MB - Reserved from 2MB pages
223 * - RTE_MEMZONE_1GB - Reserved from 1GB pages
224 * - RTE_MEMZONE_16MB - Reserved from 16MB pages
225 * - RTE_MEMZONE_16GB - Reserved from 16GB pages
226 * - RTE_MEMZONE_256KB - Reserved from 256KB pages
227 * - RTE_MEMZONE_256MB - Reserved from 256MB pages
228 * - RTE_MEMZONE_512MB - Reserved from 512MB pages
229 * - RTE_MEMZONE_4GB - Reserved from 4GB pages
230 * - RTE_MEMZONE_SIZE_HINT_ONLY - Allow alternative page size to be used if
231 * the requested page size is unavailable.
232 * If this flag is not set, the function
233 * will return error on an unavailable size
236 * Alignment for resulting memzone. Must be a power of 2.
238 * Boundary for resulting memzone. Must be a power of 2 or zero.
239 * Zero value implies no boundary condition.
241 * A pointer to a correctly-filled read-only memzone descriptor, or NULL
243 * On error case, rte_errno will be set appropriately:
244 * - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
245 * - E_RTE_SECONDARY - function was called from a secondary process instance
246 * - ENOSPC - the maximum number of memzones has already been allocated
247 * - EEXIST - a memzone with the same name already exists
248 * - ENOMEM - no appropriate memory area found in which to create memzone
249 * - EINVAL - invalid parameters
251 const struct rte_memzone *rte_memzone_reserve_bounded(const char *name,
252 size_t len, int socket_id,
253 unsigned flags, unsigned align, unsigned bound);
259 * A pointer to the memzone
261 * -EINVAL - invalid parameter.
264 int rte_memzone_free(const struct rte_memzone *mz);
267 * Lookup for a memzone.
269 * Get a pointer to a descriptor of an already reserved memory
270 * zone identified by the name given as an argument.
273 * The name of the memzone.
275 * A pointer to a read-only memzone descriptor.
277 const struct rte_memzone *rte_memzone_lookup(const char *name);
280 * Dump all reserved memzones to a file.
283 * A pointer to a file for output
285 void rte_memzone_dump(FILE *f);
288 * Walk list of all memzones
293 * Argument passed to iterator
295 void rte_memzone_walk(void (*func)(const struct rte_memzone *, void *arg),
302 #endif /* _RTE_MEMZONE_H_ */