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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>
61 #define RTE_MEMZONE_2MB 0x00000001 /**< Use 2MB pages. */
62 #define RTE_MEMZONE_1GB 0x00000002 /**< Use 1GB pages. */
63 #define RTE_MEMZONE_16MB 0x00000100 /**< Use 16MB pages. */
64 #define RTE_MEMZONE_16GB 0x00000200 /**< Use 16GB pages. */
65 #define RTE_MEMZONE_256KB 0x00010000 /**< Use 256KB pages. */
66 #define RTE_MEMZONE_256MB 0x00020000 /**< Use 256MB pages. */
67 #define RTE_MEMZONE_512MB 0x00040000 /**< Use 512MB pages. */
68 #define RTE_MEMZONE_4GB 0x00080000 /**< Use 4GB pages. */
69 #define RTE_MEMZONE_SIZE_HINT_ONLY 0x00000004 /**< Use available page size */
72 * A structure describing a memzone, which is a contiguous portion of
73 * physical memory identified by a name.
77 #define RTE_MEMZONE_NAMESIZE 32 /**< Maximum length of memory zone name.*/
78 char name[RTE_MEMZONE_NAMESIZE]; /**< Name of the memory zone. */
80 phys_addr_t phys_addr; /**< Start physical address. */
82 void *addr; /**< Start virtual address. */
83 uint64_t addr_64; /**< Makes sure addr is always 64-bits */
85 size_t len; /**< Length of the memzone. */
87 uint64_t hugepage_sz; /**< The page size of underlying memory */
89 int32_t socket_id; /**< NUMA socket ID. */
91 uint32_t flags; /**< Characteristics of this memzone. */
92 uint32_t memseg_id; /**< Memseg it belongs. */
93 } __attribute__((__packed__));
96 * Reserve a portion of physical memory.
98 * This function reserves some memory and returns a pointer to a
99 * correctly filled memzone descriptor. If the allocation cannot be
103 * The name of the memzone. If it already exists, the function will
104 * fail and return NULL.
106 * The size of the memory to be reserved. If it
107 * is 0, the biggest contiguous zone will be reserved.
109 * The socket identifier in the case of
110 * NUMA. The value can be SOCKET_ID_ANY if there is no NUMA
111 * constraint for the reserved zone.
113 * The flags parameter is used to request memzones to be
114 * taken from specifically sized hugepages.
115 * - RTE_MEMZONE_2MB - Reserved from 2MB pages
116 * - RTE_MEMZONE_1GB - Reserved from 1GB pages
117 * - RTE_MEMZONE_16MB - Reserved from 16MB pages
118 * - RTE_MEMZONE_16GB - Reserved from 16GB pages
119 * - RTE_MEMZONE_256KB - Reserved from 256KB pages
120 * - RTE_MEMZONE_256MB - Reserved from 256MB pages
121 * - RTE_MEMZONE_512MB - Reserved from 512MB pages
122 * - RTE_MEMZONE_4GB - Reserved from 4GB pages
123 * - RTE_MEMZONE_SIZE_HINT_ONLY - Allow alternative page size to be used if
124 * the requested page size is unavailable.
125 * If this flag is not set, the function
126 * will return error on an unavailable size
129 * A pointer to a correctly-filled read-only memzone descriptor, or NULL
131 * On error case, rte_errno will be set appropriately:
132 * - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
133 * - E_RTE_SECONDARY - function was called from a secondary process instance
134 * - ENOSPC - the maximum number of memzones has already been allocated
135 * - EEXIST - a memzone with the same name already exists
136 * - ENOMEM - no appropriate memory area found in which to create memzone
137 * - EINVAL - invalid parameters
139 const struct rte_memzone *rte_memzone_reserve(const char *name,
140 size_t len, int socket_id,
144 * Reserve a portion of physical memory with alignment on a specified
147 * This function reserves some memory with alignment on a specified
148 * boundary, and returns a pointer to a correctly filled memzone
149 * descriptor. If the allocation cannot be done or if the alignment
150 * is not a power of 2, returns NULL.
153 * The name of the memzone. If it already exists, the function will
154 * fail and return NULL.
156 * The size of the memory to be reserved. If it
157 * is 0, the biggest contiguous zone will be reserved.
159 * The socket identifier in the case of
160 * NUMA. The value can be SOCKET_ID_ANY if there is no NUMA
161 * constraint for the reserved zone.
163 * The flags parameter is used to request memzones to be
164 * taken from specifically sized hugepages.
165 * - RTE_MEMZONE_2MB - Reserved from 2MB pages
166 * - RTE_MEMZONE_1GB - Reserved from 1GB pages
167 * - RTE_MEMZONE_16MB - Reserved from 16MB pages
168 * - RTE_MEMZONE_16GB - Reserved from 16GB pages
169 * - RTE_MEMZONE_256KB - Reserved from 256KB pages
170 * - RTE_MEMZONE_256MB - Reserved from 256MB pages
171 * - RTE_MEMZONE_512MB - Reserved from 512MB pages
172 * - RTE_MEMZONE_4GB - Reserved from 4GB pages
173 * - RTE_MEMZONE_SIZE_HINT_ONLY - Allow alternative page size to be used if
174 * the requested page size is unavailable.
175 * If this flag is not set, the function
176 * will return error on an unavailable size
179 * Alignment for resulting memzone. Must be a power of 2.
181 * A pointer to a correctly-filled read-only memzone descriptor, or NULL
183 * On error case, rte_errno will be set appropriately:
184 * - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
185 * - E_RTE_SECONDARY - function was called from a secondary process instance
186 * - ENOSPC - the maximum number of memzones has already been allocated
187 * - EEXIST - a memzone with the same name already exists
188 * - ENOMEM - no appropriate memory area found in which to create memzone
189 * - EINVAL - invalid parameters
191 const struct rte_memzone *rte_memzone_reserve_aligned(const char *name,
192 size_t len, int socket_id,
193 unsigned flags, unsigned align);
196 * Reserve a portion of physical memory with specified alignment and
199 * This function reserves some memory with specified alignment and
200 * boundary, and returns a pointer to a correctly filled memzone
201 * descriptor. If the allocation cannot be done or if the alignment
202 * or boundary are not a power of 2, returns NULL.
203 * Memory buffer is reserved in a way, that it wouldn't cross specified
204 * boundary. That implies that requested length should be less or equal
208 * The name of the memzone. If it already exists, the function will
209 * fail and return NULL.
211 * The size of the memory to be reserved. If it
212 * is 0, the biggest contiguous zone will be reserved.
214 * The socket identifier in the case of
215 * NUMA. The value can be SOCKET_ID_ANY if there is no NUMA
216 * constraint for the reserved zone.
218 * The flags parameter is used to request memzones to be
219 * taken from specifically sized hugepages.
220 * - RTE_MEMZONE_2MB - Reserved from 2MB pages
221 * - RTE_MEMZONE_1GB - Reserved from 1GB pages
222 * - RTE_MEMZONE_16MB - Reserved from 16MB pages
223 * - RTE_MEMZONE_16GB - Reserved from 16GB pages
224 * - RTE_MEMZONE_256KB - Reserved from 256KB pages
225 * - RTE_MEMZONE_256MB - Reserved from 256MB pages
226 * - RTE_MEMZONE_512MB - Reserved from 512MB pages
227 * - RTE_MEMZONE_4GB - Reserved from 4GB pages
228 * - RTE_MEMZONE_SIZE_HINT_ONLY - Allow alternative page size to be used if
229 * the requested page size is unavailable.
230 * If this flag is not set, the function
231 * will return error on an unavailable size
234 * Alignment for resulting memzone. Must be a power of 2.
236 * Boundary for resulting memzone. Must be a power of 2 or zero.
237 * Zero value implies no boundary condition.
239 * A pointer to a correctly-filled read-only memzone descriptor, or NULL
241 * On error case, rte_errno will be set appropriately:
242 * - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
243 * - E_RTE_SECONDARY - function was called from a secondary process instance
244 * - ENOSPC - the maximum number of memzones has already been allocated
245 * - EEXIST - a memzone with the same name already exists
246 * - ENOMEM - no appropriate memory area found in which to create memzone
247 * - EINVAL - invalid parameters
249 const struct rte_memzone *rte_memzone_reserve_bounded(const char *name,
250 size_t len, int socket_id,
251 unsigned flags, unsigned align, unsigned bound);
257 * A pointer to the memzone
259 * -EINVAL - invalid parameter.
262 int rte_memzone_free(const struct rte_memzone *mz);
265 * Lookup for a memzone.
267 * Get a pointer to a descriptor of an already reserved memory
268 * zone identified by the name given as an argument.
271 * The name of the memzone.
273 * A pointer to a read-only memzone descriptor.
275 const struct rte_memzone *rte_memzone_lookup(const char *name);
278 * Dump all reserved memzones to the console.
281 * A pointer to a file for output
283 void rte_memzone_dump(FILE *f);
286 * Walk list of all memzones
291 * Argument passed to iterator
293 void rte_memzone_walk(void (*func)(const struct rte_memzone *, void *arg),
300 #endif /* _RTE_MEMZONE_H_ */