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41 * EAL Configuration API
50 #define RTE_VERSION 1 /**< The version of the RTE configuration structure. */
51 #define RTE_MAGIC 19820526 /**< Magic number written by the main partition when ready. */
54 * The lcore role (used in RTE or not).
56 enum rte_lcore_role_t {
62 * The type of process in a linuxapp, multi-process setup
64 enum rte_proc_type_t {
65 RTE_PROC_AUTO = -1, /* allow auto-detection of primary/secondary */
66 RTE_PROC_PRIMARY = 0, /* set to zero, so primary is the default */
73 * The global RTE configuration structure.
76 uint32_t version; /**< Configuration [structure] version. */
77 uint32_t magic; /**< Magic number - Sanity check. */
80 uint32_t master_lcore; /**< Id of the master lcore */
81 uint32_t lcore_count; /**< Number of available logical cores. */
82 enum rte_lcore_role_t lcore_role[RTE_MAX_LCORE]; /**< State of cores. */
84 /** Primary or secondary configuration */
85 enum rte_proc_type_t process_type;
88 * Pointer to memory configuration, which may be shared across multiple
89 * Intel DPDK instances
91 struct rte_mem_config *mem_config;
92 } __attribute__((__packed__));
95 * Get the global configuration structure.
98 * A pointer to the global configuration structure.
100 struct rte_config *rte_eal_get_configuration(void);
103 * Get a lcore's role.
106 * The identifier of the lcore.
108 * The role of the lcore.
110 enum rte_lcore_role_t rte_eal_lcore_role(unsigned lcore_id);
114 * Get the process type in a multi-process setup
119 enum rte_proc_type_t rte_eal_process_type(void);
122 * Initialize the Environment Abstraction Layer (EAL).
124 * This function is to be executed on the MASTER lcore only, as soon
125 * as possible in the application's main() function.
127 * The function finishes the initialization process that was started
128 * during boot (in case of baremetal) or before main() is called (in
129 * case of linuxapp). It puts the SLAVE lcores in the WAIT state.
131 * When the multi-partition feature is supported, depending on the
132 * configuration (if CONFIG_RTE_EAL_MAIN_PARTITION is disabled), this
133 * function waits to ensure that the magic number is set before
134 * returning. See also the rte_eal_get_configuration() function. Note:
135 * This behavior may change in the future.
138 * The argc argument that was given to the main() function.
140 * The argv argument that was given to the main() function.
142 * - On success, the number of parsed arguments, which is greater or
143 * equal to zero. After the call to rte_eal_init(),
144 * all arguments argv[x] with x < ret may be modified and should
145 * not be accessed by the application.
146 * - On failure, a negative error value.
148 int rte_eal_init(int argc, char **argv);
150 * Usage function typedef used by the application usage function.
152 * Use this function typedef to define and call rte_set_applcation_usage_hook()
155 typedef void (*rte_usage_hook_t)(const char * prgname);
158 * Add application usage routine callout from the eal_usage() routine.
160 * This function allows the application to include its usage message
161 * in the EAL system usage message. The routine rte_set_application_usage_hook()
162 * needs to be called before the rte_eal_init() routine in the application.
164 * This routine is optional for the application and will behave as if the set
165 * routine was never called as the default behavior.
168 * The func argument is a function pointer to the application usage routine.
169 * Called function is defined using rte_usage_hook_t typedef, which is of
170 * the form void rte_usage_func(const char * prgname).
172 * Calling this routine with a NULL value will reset the usage hook routine and
173 * return the current value, which could be NULL.
175 * - Returns the current value of the rte_application_usage pointer to allow
176 * the caller to daisy chain the usage routines if needing more then one.
179 rte_set_application_usage_hook( rte_usage_hook_t usage_func );
182 * macro to get the lock of tailq in mem_config
184 #define RTE_EAL_TAILQ_RWLOCK (&rte_eal_get_configuration()->mem_config->qlock)
187 * macro to get the multiple lock of mempool shared by mutiple-instance
189 #define RTE_EAL_MEMPOOL_RWLOCK (&rte_eal_get_configuration()->mem_config->mplock)
193 * Utility macro to do a thread-safe tailq 'INSERT' of rte_mem_config
196 * a kind of tailq define in enum rte_tailq_t
199 * type of list(tailq head)
202 * The element will be added into the list
205 #define RTE_EAL_TAILQ_INSERT_TAIL(idx, type, elm) do { \
207 list = RTE_TAILQ_LOOKUP_BY_IDX(idx, type); \
208 rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK); \
209 TAILQ_INSERT_TAIL(list, elm, next); \
210 rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK); \
214 * Utility macro to do a thread-safe tailq 'REMOVE' of rte_mem_config
217 * a kind of tailq define in enum rte_tailq_t
220 * type of list(tailq head)
223 * The element will be remove from the list
226 #define RTE_EAL_TAILQ_REMOVE(idx, type, elm) do { \
228 list = RTE_TAILQ_LOOKUP_BY_IDX(idx, type); \
229 rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK); \
230 TAILQ_REMOVE(list, elm, next); \
231 rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK); \
236 * macro to check TAILQ exist
239 * a kind of tailq define in enum rte_tailq_t
242 #define RTE_EAL_TAILQ_EXIST_CHECK(idx) do { \
243 if (RTE_TAILQ_LOOKUP_BY_IDX(idx, rte_tailq_head) == NULL){ \
244 rte_errno = E_RTE_NO_TAILQ; \
254 #endif /* _RTE_EAL_H_ */