1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2018 Intel Corporation
11 * EAL Configuration API
18 #include <rte_config.h>
19 #include <rte_compat.h>
20 #include <rte_per_lcore.h>
24 #include <rte_pci_dev_feature_defs.h>
30 #define RTE_MAGIC 19820526 /**< Magic number written by the main partition when ready. */
32 /* Maximum thread_name length. */
33 #define RTE_MAX_THREAD_NAME_LEN 16
36 * The type of process in a linux, multi-process setup
38 enum rte_proc_type_t {
39 RTE_PROC_AUTO = -1, /* allow auto-detection of primary/secondary */
40 RTE_PROC_PRIMARY = 0, /* set to zero, so primary is the default */
47 * Get the process type in a multi-process setup
52 enum rte_proc_type_t rte_eal_process_type(void);
55 * Request iopl privilege for all RPL.
57 * This function should be called by pmds which need access to ioports.
60 * - On success, returns 0.
61 * - On failure, returns -1.
63 int rte_eal_iopl_init(void);
66 * Initialize the Environment Abstraction Layer (EAL).
68 * This function is to be executed on the MAIN lcore only, as soon
69 * as possible in the application's main() function.
70 * It puts the WORKER lcores in the WAIT state.
73 * A non-negative value. If it is greater than 0, the array members
74 * for argv[0] through argv[argc] (non-inclusive) shall contain pointers
77 * An array of strings. The contents of the array, as well as the strings
78 * which are pointed to by the array, may be modified by this function.
80 * - On success, the number of parsed arguments, which is greater or
81 * equal to zero. After the call to rte_eal_init(),
82 * all arguments argv[x] with x < ret may have been modified by this
83 * function call and should not be further interpreted by the
84 * application. The EAL does not take any ownership of the memory used
85 * for either the argv array, or its members.
86 * - On failure, -1 and rte_errno is set to a value indicating the cause
87 * for failure. In some instances, the application will need to be
88 * restarted as part of clearing the issue.
90 * Error codes returned via rte_errno:
91 * EACCES indicates a permissions issue.
93 * EAGAIN indicates either a bus or system resource was not available,
94 * setup may be attempted again.
96 * EALREADY indicates that the rte_eal_init function has already been
97 * called, and cannot be called again.
99 * EFAULT indicates the tailq configuration name was not found in
100 * memory configuration.
102 * EINVAL indicates invalid parameters were passed as argv/argc.
104 * ENOMEM indicates failure likely caused by an out-of-memory condition.
106 * ENODEV indicates memory setup issues.
108 * ENOTSUP indicates that the EAL cannot initialize on this system.
110 * EPROTO indicates that the PCI bus is either not present, or is not
111 * readable by the eal.
113 * ENOEXEC indicates that a service core failed to launch successfully.
115 int rte_eal_init(int argc, char **argv);
118 * Clean up the Environment Abstraction Layer (EAL)
120 * This function must be called to release any internal resources that EAL has
121 * allocated during rte_eal_init(). After this call, no DPDK function calls may
122 * be made. It is expected that common usage of this function is to call it
123 * just before terminating the process.
126 * - 0 Successfully released all internal EAL resources.
127 * - -EFAULT There was an error in releasing all resources.
129 int rte_eal_cleanup(void);
132 * Check if a primary process is currently alive
134 * This function returns true when a primary process is currently
137 * @param config_file_path
138 * The config_file_path argument provided should point at the location
139 * that the primary process will create its config file. If NULL, the default
140 * config file path is used.
143 * - If alive, returns 1.
144 * - If dead, returns 0.
146 int rte_eal_primary_proc_alive(const char *config_file_path);
149 * Disable multiprocess.
151 * This function can be called to indicate that multiprocess won't be used for
152 * the rest of the application life.
155 * - true if called from a primary process that had no secondary processes
157 * - false, otherwise.
160 bool rte_mp_disable(void);
162 #define RTE_MP_MAX_FD_NUM 8 /* The max amount of fds */
163 #define RTE_MP_MAX_NAME_LEN 64 /* The max length of action name */
164 #define RTE_MP_MAX_PARAM_LEN 256 /* The max length of param */
166 char name[RTE_MP_MAX_NAME_LEN];
169 uint8_t param[RTE_MP_MAX_PARAM_LEN];
170 int fds[RTE_MP_MAX_FD_NUM];
173 struct rte_mp_reply {
176 struct rte_mp_msg *msgs; /* caller to free */
180 * Action function typedef used by other components.
182 * As we create socket channel for primary/secondary communication, use
183 * this function typedef to register action for coming messages.
185 * @note When handling IPC request callbacks, the reply must be sent even in
186 * cases of error handling. Simply returning success or failure will *not*
187 * send a response to the requestor.
188 * Implementation of error signalling mechanism is up to the application.
190 * @note No memory allocations should take place inside the callback.
192 typedef int (*rte_mp_t)(const struct rte_mp_msg *msg, const void *peer);
195 * Asynchronous reply function typedef used by other components.
197 * As we create socket channel for primary/secondary communication, use
198 * this function typedef to register action for coming responses to asynchronous
201 * @note When handling IPC request callbacks, the reply must be sent even in
202 * cases of error handling. Simply returning success or failure will *not*
203 * send a response to the requestor.
204 * Implementation of error signalling mechanism is up to the application.
206 * @note No memory allocations should take place inside the callback.
208 typedef int (*rte_mp_async_reply_t)(const struct rte_mp_msg *request,
209 const struct rte_mp_reply *reply);
212 * Register an action function for primary/secondary communication.
214 * Call this function to register an action, if the calling component wants
215 * to response the messages from the corresponding component in its primary
216 * process or secondary processes.
218 * @note IPC may be unsupported in certain circumstances, so caller should check
222 * The name argument plays as the nonredundant key to find the action.
225 * The action argument is the function pointer to the action function.
232 rte_mp_action_register(const char *name, rte_mp_t action);
235 * Unregister an action function for primary/secondary communication.
237 * Call this function to unregister an action if the calling component does
238 * not want to response the messages from the corresponding component in its
239 * primary process or secondary processes.
241 * @note IPC may be unsupported in certain circumstances, so caller should check
245 * The name argument plays as the nonredundant key to find the action.
249 rte_mp_action_unregister(const char *name);
252 * Send a message to the peer process.
254 * This function will send a message which will be responded by the action
255 * identified by name in the peer process.
258 * The msg argument contains the customized message.
261 * - On success, return 0.
262 * - On failure, return -1, and the reason will be stored in rte_errno.
265 rte_mp_sendmsg(struct rte_mp_msg *msg);
268 * Send a request to the peer process and expect a reply.
270 * This function sends a request message to the peer process, and will
271 * block until receiving reply message from the peer process.
273 * @note The caller is responsible to free reply->replies.
275 * @note This API must not be used inside memory-related or IPC callbacks, and
276 * no memory allocations should take place inside such callback.
278 * @note IPC may be unsupported in certain circumstances, so caller should check
282 * The req argument contains the customized request message.
285 * The reply argument will be for storing all the replied messages;
286 * the caller is responsible for free reply->msgs.
289 * The ts argument specifies how long we can wait for the peer(s) to reply.
292 * - On success, return 0.
293 * - On failure, return -1, and the reason will be stored in rte_errno.
296 rte_mp_request_sync(struct rte_mp_msg *req, struct rte_mp_reply *reply,
297 const struct timespec *ts);
300 * Send a request to the peer process and expect a reply in a separate callback.
302 * This function sends a request message to the peer process, and will not
303 * block. Instead, reply will be received in a separate callback.
305 * @note IPC may be unsupported in certain circumstances, so caller should check
309 * The req argument contains the customized request message.
312 * The ts argument specifies how long we can wait for the peer(s) to reply.
315 * The callback to trigger when all responses for this request have arrived.
318 * - On success, return 0.
319 * - On failure, return -1, and the reason will be stored in rte_errno.
322 rte_mp_request_async(struct rte_mp_msg *req, const struct timespec *ts,
323 rte_mp_async_reply_t clb);
326 * Send a reply to the peer process.
328 * This function will send a reply message in response to a request message
329 * received previously.
331 * @note When handling IPC request callbacks, the reply must be sent even in
332 * cases of error handling. Simply returning success or failure will *not*
333 * send a response to the requestor.
334 * Implementation of error signalling mechanism is up to the application.
337 * The msg argument contains the customized message.
340 * The peer argument is the pointer to the peer socket path.
343 * - On success, return 0.
344 * - On failure, return -1, and the reason will be stored in rte_errno.
347 rte_mp_reply(struct rte_mp_msg *msg, const char *peer);
350 * Usage function typedef used by the application usage function.
352 * Use this function typedef to define and call rte_set_application_usage_hook()
355 typedef void (*rte_usage_hook_t)(const char * prgname);
358 * Add application usage routine callout from the eal_usage() routine.
360 * This function allows the application to include its usage message
361 * in the EAL system usage message. The routine rte_set_application_usage_hook()
362 * needs to be called before the rte_eal_init() routine in the application.
364 * This routine is optional for the application and will behave as if the set
365 * routine was never called as the default behavior.
368 * The func argument is a function pointer to the application usage routine.
369 * Called function is defined using rte_usage_hook_t typedef, which is of
370 * the form void rte_usage_func(const char * prgname).
372 * Calling this routine with a NULL value will reset the usage hook routine and
373 * return the current value, which could be NULL.
375 * - Returns the current value of the rte_application_usage pointer to allow
376 * the caller to daisy chain the usage routines if needing more then one.
379 rte_set_application_usage_hook(rte_usage_hook_t usage_func);
382 * Whether EAL is using huge pages (disabled by --no-huge option).
383 * The no-huge mode is not compatible with all drivers or features.
386 * Nonzero if hugepages are enabled.
388 int rte_eal_has_hugepages(void);
391 * Whether EAL is using PCI bus.
392 * Disabled by --no-pci option.
395 * Nonzero if the PCI bus is enabled.
397 int rte_eal_has_pci(void);
400 * Whether the EAL was asked to create UIO device.
405 int rte_eal_create_uio_dev(void);
408 * The user-configured vfio interrupt mode.
411 * Interrupt mode configured with the command line,
412 * RTE_INTR_MODE_NONE by default.
414 enum rte_intr_mode rte_eal_vfio_intr_mode(void);
418 * @b EXPERIMENTAL: this API may change without prior notice
420 * Copy the user-configured vfio VF token.
423 * vfio VF token configured with the command line is copied
424 * into this parameter, zero uuid by default.
427 void rte_eal_vfio_get_vf_token(rte_uuid_t vf_token);
430 * A wrap API for syscall gettid.
433 * On success, returns the thread ID of calling process.
434 * It is always successful.
436 int rte_sys_gettid(void);
438 RTE_DECLARE_PER_LCORE(int, _thread_id);
441 * Get system unique thread id.
444 * On success, returns the thread ID of calling process.
445 * It is always successful.
447 static inline int rte_gettid(void)
449 if (RTE_PER_LCORE(_thread_id) == -1)
450 RTE_PER_LCORE(_thread_id) = rte_sys_gettid();
451 return RTE_PER_LCORE(_thread_id);
458 * enum rte_iova_mode value.
460 enum rte_iova_mode rte_eal_iova_mode(void);
463 * Get user provided pool ops name for mbuf
466 * returns user provided pool ops name.
469 rte_eal_mbuf_user_pool_ops(void);
472 * Get the runtime directory of DPDK
475 * The runtime directory path of DPDK
478 rte_eal_get_runtime_dir(void);
484 #endif /* _RTE_EAL_H_ */