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40 * EAL Configuration API
46 #include <rte_per_lcore.h>
52 #define RTE_MAGIC 19820526 /**< Magic number written by the main partition when ready. */
55 * The lcore role (used in RTE or not).
57 enum rte_lcore_role_t {
63 * The type of process in a linuxapp, multi-process setup
65 enum rte_proc_type_t {
66 RTE_PROC_AUTO = -1, /* allow auto-detection of primary/secondary */
67 RTE_PROC_PRIMARY = 0, /* set to zero, so primary is the default */
74 * The global RTE configuration structure.
77 uint32_t master_lcore; /**< Id of the master lcore */
78 uint32_t lcore_count; /**< Number of available logical cores. */
79 enum rte_lcore_role_t lcore_role[RTE_MAX_LCORE]; /**< State of cores. */
81 /** Primary or secondary configuration */
82 enum rte_proc_type_t process_type;
85 * Pointer to memory configuration, which may be shared across multiple
86 * Intel DPDK instances
88 struct rte_mem_config *mem_config;
89 } __attribute__((__packed__));
92 * Get the global configuration structure.
95 * A pointer to the global configuration structure.
97 struct rte_config *rte_eal_get_configuration(void);
100 * Get a lcore's role.
103 * The identifier of the lcore.
105 * The role of the lcore.
107 enum rte_lcore_role_t rte_eal_lcore_role(unsigned lcore_id);
111 * Get the process type in a multi-process setup
116 enum rte_proc_type_t rte_eal_process_type(void);
119 * Request iopl privilege for all RPL.
121 * This function should be called by pmds which need access to ioports.
124 * - On success, returns 0.
125 * - On failure, returns -1.
127 int rte_eal_iopl_init(void);
130 * Initialize the Environment Abstraction Layer (EAL).
132 * This function is to be executed on the MASTER lcore only, as soon
133 * as possible in the application's main() function.
135 * The function finishes the initialization process before main() is called.
136 * It puts the SLAVE lcores in the WAIT state.
138 * When the multi-partition feature is supported, depending on the
139 * configuration (if CONFIG_RTE_EAL_MAIN_PARTITION is disabled), this
140 * function waits to ensure that the magic number is set before
141 * returning. See also the rte_eal_get_configuration() function. Note:
142 * This behavior may change in the future.
145 * The argc argument that was given to the main() function.
147 * The argv argument that was given to the main() function.
149 * - On success, the number of parsed arguments, which is greater or
150 * equal to zero. After the call to rte_eal_init(),
151 * all arguments argv[x] with x < ret may be modified and should
152 * not be accessed by the application.
153 * - On failure, a negative error value.
155 int rte_eal_init(int argc, char **argv);
157 * Usage function typedef used by the application usage function.
159 * Use this function typedef to define and call rte_set_applcation_usage_hook()
162 typedef void (*rte_usage_hook_t)(const char * prgname);
165 * Add application usage routine callout from the eal_usage() routine.
167 * This function allows the application to include its usage message
168 * in the EAL system usage message. The routine rte_set_application_usage_hook()
169 * needs to be called before the rte_eal_init() routine in the application.
171 * This routine is optional for the application and will behave as if the set
172 * routine was never called as the default behavior.
175 * The func argument is a function pointer to the application usage routine.
176 * Called function is defined using rte_usage_hook_t typedef, which is of
177 * the form void rte_usage_func(const char * prgname).
179 * Calling this routine with a NULL value will reset the usage hook routine and
180 * return the current value, which could be NULL.
182 * - Returns the current value of the rte_application_usage pointer to allow
183 * the caller to daisy chain the usage routines if needing more then one.
186 rte_set_application_usage_hook( rte_usage_hook_t usage_func );
189 * macro to get the lock of tailq in mem_config
191 #define RTE_EAL_TAILQ_RWLOCK (&rte_eal_get_configuration()->mem_config->qlock)
194 * macro to get the multiple lock of mempool shared by mutiple-instance
196 #define RTE_EAL_MEMPOOL_RWLOCK (&rte_eal_get_configuration()->mem_config->mplock)
199 * Whether EAL is using huge pages (disabled by --no-huge option).
200 * The no-huge mode cannot be used with UIO poll-mode drivers like igb/ixgbe.
201 * It is useful for NIC drivers (e.g. librte_pmd_mlx4, librte_pmd_vmxnet3) or
202 * crypto drivers (e.g. librte_crypto_nitrox) provided by third-parties such
206 * Nonzero if hugepages are enabled.
208 int rte_eal_has_hugepages(void);
211 * A wrap API for syscall gettid.
214 * On success, returns the thread ID of calling process.
215 * It is always successful.
217 int rte_sys_gettid(void);
220 * Get system unique thread id.
223 * On success, returns the thread ID of calling process.
224 * It is always successful.
226 static inline int rte_gettid(void)
228 static RTE_DEFINE_PER_LCORE(int, _thread_id) = -1;
229 if (RTE_PER_LCORE(_thread_id) == -1)
230 RTE_PER_LCORE(_thread_id) = rte_sys_gettid();
231 return RTE_PER_LCORE(_thread_id);
238 #endif /* _RTE_EAL_H_ */