X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_eal%2Fcommon%2Finclude%2Frte_eal.h;h=2f9ed298de63eea593b5712e5462d36d752910cf;hb=df3ff6be2b33faea3edf3c112b9bdc5b74d6f684;hp=fe1323df65a2872807784489682eb1914fb9a87a;hpb=c5e9eeca5a67a8272f0fdedcd0afc9b2d22be376;p=dpdk.git diff --git a/lib/librte_eal/common/include/rte_eal.h b/lib/librte_eal/common/include/rte_eal.h index fe1323df65..2f9ed298de 100644 --- a/lib/librte_eal/common/include/rte_eal.h +++ b/lib/librte_eal/common/include/rte_eal.h @@ -1,34 +1,5 @@ -/*- - * BSD LICENSE - * - * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Intel Corporation nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2010-2018 Intel Corporation */ #ifndef _RTE_EAL_H_ @@ -41,24 +12,36 @@ */ #include +#include +#include + +#include +#include +#include +#include + +#include #ifdef __cplusplus extern "C" { #endif -#define RTE_VERSION 1 /**< The version of the RTE configuration structure. */ #define RTE_MAGIC 19820526 /**< Magic number written by the main partition when ready. */ +/* Maximum thread_name length. */ +#define RTE_MAX_THREAD_NAME_LEN 16 + /** * The lcore role (used in RTE or not). */ enum rte_lcore_role_t { ROLE_RTE, ROLE_OFF, + ROLE_SERVICE, }; /** - * The type of process in a linuxapp, multi-process setup + * The type of process in a linux, multi-process setup */ enum rte_proc_type_t { RTE_PROC_AUTO = -1, /* allow auto-detection of primary/secondary */ @@ -69,92 +52,329 @@ enum rte_proc_type_t { }; /** - * The global RTE configuration structure. + * Get the process type in a multi-process setup + * + * @return + * The process type + */ +enum rte_proc_type_t rte_eal_process_type(void); + +/** + * Request iopl privilege for all RPL. + * + * This function should be called by pmds which need access to ioports. + + * @return + * - On success, returns 0. + * - On failure, returns -1. + */ +int rte_eal_iopl_init(void); + +/** + * Initialize the Environment Abstraction Layer (EAL). + * + * This function is to be executed on the MASTER lcore only, as soon + * as possible in the application's main() function. + * + * The function finishes the initialization process before main() is called. + * It puts the SLAVE lcores in the WAIT state. + * + * When the multi-partition feature is supported, depending on the + * configuration (if CONFIG_RTE_EAL_MAIN_PARTITION is disabled), this + * function waits to ensure that the magic number is set before + * returning. See also the rte_eal_get_configuration() function. Note: + * This behavior may change in the future. + * + * @param argc + * A non-negative value. If it is greater than 0, the array members + * for argv[0] through argv[argc] (non-inclusive) shall contain pointers + * to strings. + * @param argv + * An array of strings. The contents of the array, as well as the strings + * which are pointed to by the array, may be modified by this function. + * @return + * - On success, the number of parsed arguments, which is greater or + * equal to zero. After the call to rte_eal_init(), + * all arguments argv[x] with x < ret may have been modified by this + * function call and should not be further interpreted by the + * application. The EAL does not take any ownership of the memory used + * for either the argv array, or its members. + * - On failure, -1 and rte_errno is set to a value indicating the cause + * for failure. In some instances, the application will need to be + * restarted as part of clearing the issue. + * + * Error codes returned via rte_errno: + * EACCES indicates a permissions issue. + * + * EAGAIN indicates either a bus or system resource was not available, + * setup may be attempted again. + * + * EALREADY indicates that the rte_eal_init function has already been + * called, and cannot be called again. + * + * EFAULT indicates the tailq configuration name was not found in + * memory configuration. + * + * EINVAL indicates invalid parameters were passed as argv/argc. + * + * ENOMEM indicates failure likely caused by an out-of-memory condition. + * + * ENODEV indicates memory setup issues. + * + * ENOTSUP indicates that the EAL cannot initialize on this system. + * + * EPROTO indicates that the PCI bus is either not present, or is not + * readable by the eal. + * + * ENOEXEC indicates that a service core failed to launch successfully. */ -struct rte_config { - uint32_t version; /**< Configuration [structure] version. */ - uint32_t magic; /**< Magic number - Sanity check. */ +int rte_eal_init(int argc, char **argv); +/** + * Clean up the Environment Abstraction Layer (EAL) + * + * This function must be called to release any internal resources that EAL has + * allocated during rte_eal_init(). After this call, no DPDK function calls may + * be made. It is expected that common usage of this function is to call it + * just before terminating the process. + * + * @return 0 Successfully released all internal EAL resources + * @return -EFAULT There was an error in releasing all resources. + */ +int rte_eal_cleanup(void); - uint32_t master_lcore; /**< Id of the master lcore */ - uint32_t lcore_count; /**< Number of available logical cores. */ - enum rte_lcore_role_t lcore_role[RTE_MAX_LCORE]; /**< State of cores. */ +/** + * Check if a primary process is currently alive + * + * This function returns true when a primary process is currently + * active. + * + * @param config_file_path + * The config_file_path argument provided should point at the location + * that the primary process will create its config file. If NULL, the default + * config file path is used. + * + * @return + * - If alive, returns 1. + * - If dead, returns 0. + */ +int rte_eal_primary_proc_alive(const char *config_file_path); - /** Primary or secondary configuration */ - enum rte_proc_type_t process_type; +#define RTE_MP_MAX_FD_NUM 8 /* The max amount of fds */ +#define RTE_MP_MAX_NAME_LEN 64 /* The max length of action name */ +#define RTE_MP_MAX_PARAM_LEN 256 /* The max length of param */ +struct rte_mp_msg { + char name[RTE_MP_MAX_NAME_LEN]; + int len_param; + int num_fds; + uint8_t param[RTE_MP_MAX_PARAM_LEN]; + int fds[RTE_MP_MAX_FD_NUM]; +}; - /** A set of general status flags */ - unsigned flags; +struct rte_mp_reply { + int nb_sent; + int nb_received; + struct rte_mp_msg *msgs; /* caller to free */ +}; - /** - * Pointer to memory configuration, which may be shared across multiple - * Intel DPDK instances - */ - struct rte_mem_config *mem_config; -} __attribute__((__packed__)); +/** + * Action function typedef used by other components. + * + * As we create socket channel for primary/secondary communication, use + * this function typedef to register action for coming messages. + * + * @note When handling IPC request callbacks, the reply must be sent even in + * cases of error handling. Simply returning success or failure will *not* + * send a response to the requestor. + * Implementation of error signalling mechanism is up to the application. + * + * @note No memory allocations should take place inside the callback. + */ +typedef int (*rte_mp_t)(const struct rte_mp_msg *msg, const void *peer); -/* Flag definitions for rte_config flags */ -#define EAL_FLG_HIGH_IOPL 1 /**< indicates high IO privilage in a linux env */ +/** + * Asynchronous reply function typedef used by other components. + * + * As we create socket channel for primary/secondary communication, use + * this function typedef to register action for coming responses to asynchronous + * requests. + * + * @note When handling IPC request callbacks, the reply must be sent even in + * cases of error handling. Simply returning success or failure will *not* + * send a response to the requestor. + * Implementation of error signalling mechanism is up to the application. + * + * @note No memory allocations should take place inside the callback. + */ +typedef int (*rte_mp_async_reply_t)(const struct rte_mp_msg *request, + const struct rte_mp_reply *reply); /** - * Get the global configuration structure. + * @warning + * @b EXPERIMENTAL: this API may change without prior notice + * + * Register an action function for primary/secondary communication. + * + * Call this function to register an action, if the calling component wants + * to response the messages from the corresponding component in its primary + * process or secondary processes. + * + * @note IPC may be unsupported in certain circumstances, so caller should check + * for ENOTSUP error. + * + * @param name + * The name argument plays as the nonredundant key to find the action. + * + * @param action + * The action argument is the function pointer to the action function. * * @return - * A pointer to the global configuration structure. + * - 0 on success. + * - (<0) on failure. + */ +__rte_experimental +int +rte_mp_action_register(const char *name, rte_mp_t action); + +/** + * @warning + * @b EXPERIMENTAL: this API may change without prior notice + * + * Unregister an action function for primary/secondary communication. + * + * Call this function to unregister an action if the calling component does + * not want to response the messages from the corresponding component in its + * primary process or secondary processes. + * + * @note IPC may be unsupported in certain circumstances, so caller should check + * for ENOTSUP error. + * + * @param name + * The name argument plays as the nonredundant key to find the action. + * */ -struct rte_config *rte_eal_get_configuration(void); +__rte_experimental +void +rte_mp_action_unregister(const char *name); /** - * Get a lcore's role. + * @warning + * @b EXPERIMENTAL: this API may change without prior notice + * + * Send a message to the peer process. + * + * This function will send a message which will be responded by the action + * identified by name in the peer process. + * + * @param msg + * The msg argument contains the customized message. * - * @param lcore_id - * The identifier of the lcore. * @return - * The role of the lcore. + * - On success, return 0. + * - On failure, return -1, and the reason will be stored in rte_errno. */ -enum rte_lcore_role_t rte_eal_lcore_role(unsigned lcore_id); +__rte_experimental +int +rte_mp_sendmsg(struct rte_mp_msg *msg); +/** + * @warning + * @b EXPERIMENTAL: this API may change without prior notice + * + * Send a request to the peer process and expect a reply. + * + * This function sends a request message to the peer process, and will + * block until receiving reply message from the peer process. + * + * @note The caller is responsible to free reply->replies. + * + * @note This API must not be used inside memory-related or IPC callbacks, and + * no memory allocations should take place inside such callback. + * + * @note IPC may be unsupported in certain circumstances, so caller should check + * for ENOTSUP error. + * + * @param req + * The req argument contains the customized request message. + * + * @param reply + * The reply argument will be for storing all the replied messages; + * the caller is responsible for free reply->msgs. + * + * @param ts + * The ts argument specifies how long we can wait for the peer(s) to reply. + * + * @return + * - On success, return 0. + * - On failure, return -1, and the reason will be stored in rte_errno. + */ +__rte_experimental +int +rte_mp_request_sync(struct rte_mp_msg *req, struct rte_mp_reply *reply, + const struct timespec *ts); /** - * Get the process type in a multi-process setup + * @warning + * @b EXPERIMENTAL: this API may change without prior notice + * + * Send a request to the peer process and expect a reply in a separate callback. + * + * This function sends a request message to the peer process, and will not + * block. Instead, reply will be received in a separate callback. + * + * @note IPC may be unsupported in certain circumstances, so caller should check + * for ENOTSUP error. + * + * @param req + * The req argument contains the customized request message. + * + * @param ts + * The ts argument specifies how long we can wait for the peer(s) to reply. + * + * @param clb + * The callback to trigger when all responses for this request have arrived. * * @return - * The process type + * - On success, return 0. + * - On failure, return -1, and the reason will be stored in rte_errno. */ -enum rte_proc_type_t rte_eal_process_type(void); +__rte_experimental +int +rte_mp_request_async(struct rte_mp_msg *req, const struct timespec *ts, + rte_mp_async_reply_t clb); /** - * Initialize the Environment Abstraction Layer (EAL). + * @warning + * @b EXPERIMENTAL: this API may change without prior notice * - * This function is to be executed on the MASTER lcore only, as soon - * as possible in the application's main() function. + * Send a reply to the peer process. * - * The function finishes the initialization process that was started - * during boot (in case of baremetal) or before main() is called (in - * case of linuxapp). It puts the SLAVE lcores in the WAIT state. + * This function will send a reply message in response to a request message + * received previously. * - * When the multi-partition feature is supported, depending on the - * configuration (if CONFIG_RTE_EAL_MAIN_PARTITION is disabled), this - * function waits to ensure that the magic number is set before - * returning. See also the rte_eal_get_configuration() function. Note: - * This behavior may change in the future. + * @note When handling IPC request callbacks, the reply must be sent even in + * cases of error handling. Simply returning success or failure will *not* + * send a response to the requestor. + * Implementation of error signalling mechanism is up to the application. + * + * @param msg + * The msg argument contains the customized message. + * + * @param peer + * The peer argument is the pointer to the peer socket path. * - * @param argc - * The argc argument that was given to the main() function. - * @param argv - * The argv argument that was given to the main() function. * @return - * - On success, the number of parsed arguments, which is greater or - * equal to zero. After the call to rte_eal_init(), - * all arguments argv[x] with x < ret may be modified and should - * not be accessed by the application. - * - On failure, a negative error value. + * - On success, return 0. + * - On failure, return -1, and the reason will be stored in rte_errno. */ -int rte_eal_init(int argc, char **argv); +__rte_experimental +int +rte_mp_reply(struct rte_mp_msg *msg, const char *peer); + /** * Usage function typedef used by the application usage function. * - * Use this function typedef to define and call rte_set_applcation_usage_hook() + * Use this function typedef to define and call rte_set_application_usage_hook() * routine. */ typedef void (*rte_usage_hook_t)(const char * prgname); @@ -169,7 +389,7 @@ typedef void (*rte_usage_hook_t)(const char * prgname); * This routine is optional for the application and will behave as if the set * routine was never called as the default behavior. * - * @param func + * @param usage_func * The func argument is a function pointer to the application usage routine. * Called function is defined using rte_usage_hook_t typedef, which is of * the form void rte_usage_func(const char * prgname). @@ -181,87 +401,92 @@ typedef void (*rte_usage_hook_t)(const char * prgname); * the caller to daisy chain the usage routines if needing more then one. */ rte_usage_hook_t -rte_set_application_usage_hook( rte_usage_hook_t usage_func ); +rte_set_application_usage_hook(rte_usage_hook_t usage_func); /** - * macro to get the lock of tailq in mem_config + * Whether EAL is using huge pages (disabled by --no-huge option). + * The no-huge mode is not compatible with all drivers or features. + * + * @return + * Nonzero if hugepages are enabled. */ -#define RTE_EAL_TAILQ_RWLOCK (&rte_eal_get_configuration()->mem_config->qlock) +int rte_eal_has_hugepages(void); /** - * macro to get the multiple lock of mempool shared by mutiple-instance + * Whether EAL is using PCI bus. + * Disabled by --no-pci option. + * + * @return + * Nonzero if the PCI bus is enabled. */ -#define RTE_EAL_MEMPOOL_RWLOCK (&rte_eal_get_configuration()->mem_config->mplock) - +int rte_eal_has_pci(void); /** - * Utility macro to do a thread-safe tailq 'INSERT' of rte_mem_config - * - * @param idx - * a kind of tailq define in enum rte_tailq_t - * - * @param type - * type of list(tailq head) - * - * @param elm - * The element will be added into the list + * Whether the EAL was asked to create UIO device. * + * @return + * Nonzero if true. */ -#define RTE_EAL_TAILQ_INSERT_TAIL(idx, type, elm) do { \ - struct type *list; \ - list = RTE_TAILQ_LOOKUP_BY_IDX(idx, type); \ - rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK); \ - TAILQ_INSERT_TAIL(list, elm, next); \ - rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK); \ -} while (0) +int rte_eal_create_uio_dev(void); /** - * Utility macro to do a thread-safe tailq 'REMOVE' of rte_mem_config - * - * @param idx - * a kind of tailq define in enum rte_tailq_t + * The user-configured vfio interrupt mode. * - * @param type - * type of list(tailq head) - * - * @param elm - * The element will be remove from the list + * @return + * Interrupt mode configured with the command line, + * RTE_INTR_MODE_NONE by default. + */ +enum rte_intr_mode rte_eal_vfio_intr_mode(void); + +/** + * A wrap API for syscall gettid. * + * @return + * On success, returns the thread ID of calling process. + * It is always successful. */ -#define RTE_EAL_TAILQ_REMOVE(idx, type, elm) do { \ - struct type *list; \ - list = RTE_TAILQ_LOOKUP_BY_IDX(idx, type); \ - rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK); \ - TAILQ_REMOVE(list, elm, next); \ - rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK); \ -} while (0) \ +int rte_sys_gettid(void); +/** + * Get system unique thread id. + * + * @return + * On success, returns the thread ID of calling process. + * It is always successful. + */ +static inline int rte_gettid(void) +{ + static RTE_DEFINE_PER_LCORE(int, _thread_id) = -1; + if (RTE_PER_LCORE(_thread_id) == -1) + RTE_PER_LCORE(_thread_id) = rte_sys_gettid(); + return RTE_PER_LCORE(_thread_id); +} /** - * macro to check TAILQ exist + * Get the iova mode * - * @param idx - * a kind of tailq define in enum rte_tailq_t + * @return + * enum rte_iova_mode value. + */ +enum rte_iova_mode rte_eal_iova_mode(void); + +/** + * Get user provided pool ops name for mbuf * + * @return + * returns user provided pool ops name. */ -#define RTE_EAL_TAILQ_EXIST_CHECK(idx) do { \ - if (RTE_TAILQ_LOOKUP_BY_IDX(idx, rte_tailq_head) == NULL){ \ - rte_errno = E_RTE_NO_TAILQ; \ - return NULL; \ - } \ -} while(0) +const char * +rte_eal_mbuf_user_pool_ops(void); /** - * Whether EAL is using huge pages (disabled by --no-huge option). - * The no-huge mode cannot be used with UIO poll-mode drivers like igb/ixgbe. - * It is useful for NIC drivers (e.g. librte_pmd_mlx4, librte_pmd_vmxnet3) or - * crypto drivers (e.g. librte_crypto_nitrox) provided by third-parties such - * as 6WIND. + * Get the runtime directory of DPDK * * @return - * Nonzero if hugepages are enabled. + * The runtime directory path of DPDK */ -int rte_eal_has_hugepages(void); +const char * +rte_eal_get_runtime_dir(void); #ifdef __cplusplus }