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/*-
* 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.
*/
#ifndef _RTE_EAL_H_
#define _RTE_EAL_H_
/**
* @file
*
* EAL Configuration API
*/
#include <stdint.h>
#include <sched.h>
#include <rte_per_lcore.h>
#ifdef __cplusplus
extern "C" {
#endif
#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,
};
/**
* The type of process in a linuxapp, multi-process setup
*/
enum rte_proc_type_t {
RTE_PROC_AUTO = -1, /* allow auto-detection of primary/secondary */
RTE_PROC_PRIMARY = 0, /* set to zero, so primary is the default */
RTE_PROC_SECONDARY,
RTE_PROC_INVALID
};
/**
* The global RTE configuration structure.
*/
struct rte_config {
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. */
/** Primary or secondary configuration */
enum rte_proc_type_t process_type;
/**
* Pointer to memory configuration, which may be shared across multiple
* Intel DPDK instances
*/
struct rte_mem_config *mem_config;
} __attribute__((__packed__));
/**
* Get the global configuration structure.
*
* @return
* A pointer to the global configuration structure.
*/
struct rte_config *rte_eal_get_configuration(void);
/**
* Get a lcore's role.
*
* @param lcore_id
* The identifier of the lcore.
* @return
* The role of the lcore.
*/
enum rte_lcore_role_t rte_eal_lcore_role(unsigned lcore_id);
/**
* 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
* 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.
*/
int rte_eal_init(int argc, char **argv);
/**
* Usage function typedef used by the application usage function.
*
* Use this function typedef to define and call rte_set_applcation_usage_hook()
* routine.
*/
typedef void (*rte_usage_hook_t)(const char * prgname);
/**
* Add application usage routine callout from the eal_usage() routine.
*
* This function allows the application to include its usage message
* in the EAL system usage message. The routine rte_set_application_usage_hook()
* needs to be called before the rte_eal_init() routine in the application.
*
* This routine is optional for the application and will behave as if the set
* routine was never called as the default behavior.
*
* @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).
*
* Calling this routine with a NULL value will reset the usage hook routine and
* return the current value, which could be NULL.
* @return
* - Returns the current value of the rte_application_usage pointer to allow
* 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);
/**
* macro to get the lock of tailq in mem_config
*/
#define RTE_EAL_TAILQ_RWLOCK (&rte_eal_get_configuration()->mem_config->qlock)
/**
* macro to get the multiple lock of mempool shared by mutiple-instance
*/
#define RTE_EAL_MEMPOOL_RWLOCK (&rte_eal_get_configuration()->mem_config->mplock)
/**
* 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.
*
* @return
* Nonzero if hugepages are enabled.
*/
int rte_eal_has_hugepages(void);
/**
* A wrap API for syscall gettid.
*
* @return
* On success, returns the thread ID of calling process.
* It is always successful.
*/
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);
}
#ifdef __cplusplus
}
#endif
#endif /* _RTE_EAL_H_ */
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