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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2018 Intel Corporation
*/
#ifndef _RTE_EAL_H_
#define _RTE_EAL_H_
/**
* @file
*
* EAL Configuration API
*/
#include <stdint.h>
#include <sched.h>
#include <time.h>
#include <rte_config.h>
#include <rte_compat.h>
#include <rte_per_lcore.h>
#include <rte_bus.h>
#include <rte_pci_dev_feature_defs.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,
ROLE_SERVICE,
};
/**
* 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. */
uint32_t numa_node_count; /**< Number of detected NUMA nodes. */
uint32_t numa_nodes[RTE_MAX_NUMA_NODES]; /**< List of detected NUMA nodes. */
uint32_t service_lcore_count;/**< Number of available service 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;
/** PA or VA mapping mode */
enum rte_iova_mode iova_mode;
/**
* Pointer to memory configuration, which may be shared across multiple
* 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
* 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.
*/
int rte_eal_init(int argc, char **argv);
/**
* @warning
* @b EXPERIMENTAL: this API may change without prior notice
*
* 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_experimental rte_eal_cleanup(void);
/**
* 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);
#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];
};
struct rte_mp_reply {
int nb_sent;
int nb_received;
struct rte_mp_msg *msgs; /* caller to free */
};
/**
* 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.
*/
typedef int (*rte_mp_t)(const struct rte_mp_msg *msg, const void *peer);
/**
* 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.
*/
typedef int (*rte_mp_async_reply_t)(const struct rte_mp_msg *request,
const struct rte_mp_reply *reply);
/**
* @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.
*
* @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
* - 0 on success.
* - (<0) on failure.
*/
int __rte_experimental
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.
*
* @param name
* The name argument plays as the nonredundant key to find the action.
*
*/
void __rte_experimental
rte_mp_action_unregister(const char *name);
/**
* @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 responsed by the action
* identified by name in the peer process.
*
* @param msg
* The msg argument contains the customized message.
*
* @return
* - On success, return 0.
* - On failure, return -1, and the reason will be stored in rte_errno.
*/
int __rte_experimental
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.
*
* @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.
*/
int __rte_experimental
rte_mp_request_sync(struct rte_mp_msg *req, struct rte_mp_reply *reply,
const struct timespec *ts);
/**
* @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.
*
* @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
* - On success, return 0.
* - On failure, return -1, and the reason will be stored in rte_errno.
*/
int __rte_experimental
rte_mp_request_async(struct rte_mp_msg *req, const struct timespec *ts,
rte_mp_async_reply_t clb);
/**
* @warning
* @b EXPERIMENTAL: this API may change without prior notice
*
* Send a reply to the peer process.
*
* This function will send a reply message in response to a request message
* received previously.
*
* @param msg
* The msg argument contains the customized message.
*
* @param peer
* The peer argument is the pointer to the peer socket path.
*
* @return
* - On success, return 0.
* - On failure, return -1, and the reason will be stored in rte_errno.
*/
int __rte_experimental
rte_mp_reply(struct rte_mp_msg *msg, const char *peer);
/**
* Register all mp action callbacks for hotplug.
*
* @return
* 0 on success, negative on error.
*/
int __rte_experimental
rte_mp_dev_hotplug_init(void);
/**
* Usage function typedef used by the application usage function.
*
* Use this function typedef to define and call rte_set_application_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);
/**
* Whether EAL is using PCI bus.
* Disabled by --no-pci option.
*
* @return
* Nonzero if the PCI bus is enabled.
*/
int rte_eal_has_pci(void);
/**
* Whether the EAL was asked to create UIO device.
*
* @return
* Nonzero if true.
*/
int rte_eal_create_uio_dev(void);
/**
* The user-configured vfio interrupt mode.
*
* @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.
*/
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);
}
/**
* Get the iova mode
*
* @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.
*/
const char *
rte_eal_mbuf_user_pool_ops(void);
/**
* Get the runtime directory of DPDK
*
* @return
* The runtime directory path of DPDK
*/
const char *
rte_eal_get_runtime_dir(void);
#ifdef __cplusplus
}
#endif
#endif /* _RTE_EAL_H_ */
|