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40 * EAL Configuration API
46 #include <rte_per_lcore.h>
47 #include <rte_config.h>
53 #define RTE_MAGIC 19820526 /**< Magic number written by the main partition when ready. */
55 /* Maximum thread_name length. */
56 #define RTE_MAX_THREAD_NAME_LEN 16
59 * The lcore role (used in RTE or not).
61 enum rte_lcore_role_t {
68 * The type of process in a linuxapp, multi-process setup
70 enum rte_proc_type_t {
71 RTE_PROC_AUTO = -1, /* allow auto-detection of primary/secondary */
72 RTE_PROC_PRIMARY = 0, /* set to zero, so primary is the default */
79 * The global RTE configuration structure.
82 uint32_t master_lcore; /**< Id of the master lcore */
83 uint32_t lcore_count; /**< Number of available logical cores. */
84 uint32_t service_lcore_count;/**< Number of available service cores. */
85 enum rte_lcore_role_t lcore_role[RTE_MAX_LCORE]; /**< State of cores. */
87 /** Primary or secondary configuration */
88 enum rte_proc_type_t process_type;
91 * Pointer to memory configuration, which may be shared across multiple
94 struct rte_mem_config *mem_config;
95 } __attribute__((__packed__));
98 * Get the global configuration structure.
101 * A pointer to the global configuration structure.
103 struct rte_config *rte_eal_get_configuration(void);
106 * Get a lcore's role.
109 * The identifier of the lcore.
111 * The role of the lcore.
113 enum rte_lcore_role_t rte_eal_lcore_role(unsigned lcore_id);
117 * Get the process type in a multi-process setup
122 enum rte_proc_type_t rte_eal_process_type(void);
125 * Request iopl privilege for all RPL.
127 * This function should be called by pmds which need access to ioports.
130 * - On success, returns 0.
131 * - On failure, returns -1.
133 int rte_eal_iopl_init(void);
136 * Initialize the Environment Abstraction Layer (EAL).
138 * This function is to be executed on the MASTER lcore only, as soon
139 * as possible in the application's main() function.
141 * The function finishes the initialization process before main() is called.
142 * It puts the SLAVE lcores in the WAIT state.
144 * When the multi-partition feature is supported, depending on the
145 * configuration (if CONFIG_RTE_EAL_MAIN_PARTITION is disabled), this
146 * function waits to ensure that the magic number is set before
147 * returning. See also the rte_eal_get_configuration() function. Note:
148 * This behavior may change in the future.
151 * A non-negative value. If it is greater than 0, the array members
152 * for argv[0] through argv[argc] (non-inclusive) shall contain pointers
155 * An array of strings. The contents of the array, as well as the strings
156 * which are pointed to by the array, may be modified by this function.
158 * - On success, the number of parsed arguments, which is greater or
159 * equal to zero. After the call to rte_eal_init(),
160 * all arguments argv[x] with x < ret may have been modified by this
161 * function call and should not be further interpreted by the
162 * application. The EAL does not take any ownership of the memory used
163 * for either the argv array, or its members.
164 * - On failure, -1 and rte_errno is set to a value indicating the cause
165 * for failure. In some instances, the application will need to be
166 * restarted as part of clearing the issue.
168 * Error codes returned via rte_errno:
169 * EACCES indicates a permissions issue.
171 * EAGAIN indicates either a bus or system resource was not available,
172 * setup may be attempted again.
174 * EALREADY indicates that the rte_eal_init function has already been
175 * called, and cannot be called again.
177 * EFAULT indicates the tailq configuration name was not found in
178 * memory configuration.
180 * EINVAL indicates invalid parameters were passed as argv/argc.
182 * ENOMEM indicates failure likely caused by an out-of-memory condition.
184 * ENODEV indicates memory setup issues.
186 * ENOTSUP indicates that the EAL cannot initialize on this system.
188 * EPROTO indicates that the PCI bus is either not present, or is not
189 * readable by the eal.
191 * ENOEXEC indicates that a service core failed to launch successfully.
193 int rte_eal_init(int argc, char **argv);
196 * Check if a primary process is currently alive
198 * This function returns true when a primary process is currently
201 * @param config_file_path
202 * The config_file_path argument provided should point at the location
203 * that the primary process will create its config file. If NULL, the default
204 * config file path is used.
207 * - If alive, returns 1.
208 * - If dead, returns 0.
210 int rte_eal_primary_proc_alive(const char *config_file_path);
213 * Usage function typedef used by the application usage function.
215 * Use this function typedef to define and call rte_set_applcation_usage_hook()
218 typedef void (*rte_usage_hook_t)(const char * prgname);
221 * Add application usage routine callout from the eal_usage() routine.
223 * This function allows the application to include its usage message
224 * in the EAL system usage message. The routine rte_set_application_usage_hook()
225 * needs to be called before the rte_eal_init() routine in the application.
227 * This routine is optional for the application and will behave as if the set
228 * routine was never called as the default behavior.
231 * The func argument is a function pointer to the application usage routine.
232 * Called function is defined using rte_usage_hook_t typedef, which is of
233 * the form void rte_usage_func(const char * prgname).
235 * Calling this routine with a NULL value will reset the usage hook routine and
236 * return the current value, which could be NULL.
238 * - Returns the current value of the rte_application_usage pointer to allow
239 * the caller to daisy chain the usage routines if needing more then one.
242 rte_set_application_usage_hook(rte_usage_hook_t usage_func);
245 * macro to get the lock of tailq in mem_config
247 #define RTE_EAL_TAILQ_RWLOCK (&rte_eal_get_configuration()->mem_config->qlock)
250 * macro to get the multiple lock of mempool shared by mutiple-instance
252 #define RTE_EAL_MEMPOOL_RWLOCK (&rte_eal_get_configuration()->mem_config->mplock)
255 * Whether EAL is using huge pages (disabled by --no-huge option).
256 * The no-huge mode cannot be used with UIO poll-mode drivers like igb/ixgbe.
257 * It is useful for NIC drivers (e.g. librte_pmd_mlx4, librte_pmd_vmxnet3) or
258 * crypto drivers (e.g. librte_crypto_nitrox) provided by third-parties such
262 * Nonzero if hugepages are enabled.
264 int rte_eal_has_hugepages(void);
267 * A wrap API for syscall gettid.
270 * On success, returns the thread ID of calling process.
271 * It is always successful.
273 int rte_sys_gettid(void);
276 * Get system unique thread id.
279 * On success, returns the thread ID of calling process.
280 * It is always successful.
282 static inline int rte_gettid(void)
284 static RTE_DEFINE_PER_LCORE(int, _thread_id) = -1;
285 if (RTE_PER_LCORE(_thread_id) == -1)
286 RTE_PER_LCORE(_thread_id) = rte_sys_gettid();
287 return RTE_PER_LCORE(_thread_id);
290 #define RTE_INIT(func) \
291 static void __attribute__((constructor, used)) func(void)
293 #define RTE_INIT_PRIO(func, prio) \
294 static void __attribute__((constructor(prio), used)) func(void)
300 #endif /* _RTE_EAL_H_ */