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/*-
* BSD LICENSE
*
* Copyright(c) 2014 6WIND S.A.
* 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 6WIND S.A. 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_DEV_H_
#define _RTE_DEV_H_
/**
* @file
*
* RTE PMD Driver Registration Interface
*
* This file manages the list of device drivers.
*/
#ifdef __cplusplus
extern "C" {
#endif
#include <stdio.h>
#include <sys/queue.h>
#include <rte_log.h>
__attribute__((format(printf, 2, 0)))
static inline void
rte_pmd_debug_trace(const char *func_name, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
char buffer[vsnprintf(NULL, 0, fmt, ap) + 1];
va_end(ap);
va_start(ap, fmt);
vsnprintf(buffer, sizeof(buffer), fmt, ap);
va_end(ap);
rte_log(RTE_LOG_ERR, RTE_LOGTYPE_PMD, "%s: %s", func_name, buffer);
}
/* Macros for checking for restricting functions to primary instance only */
#define RTE_PROC_PRIMARY_OR_ERR_RET(retval) do { \
if (rte_eal_process_type() != RTE_PROC_PRIMARY) { \
RTE_PMD_DEBUG_TRACE("Cannot run in secondary processes\n"); \
return retval; \
} \
} while (0)
#define RTE_PROC_PRIMARY_OR_RET() do { \
if (rte_eal_process_type() != RTE_PROC_PRIMARY) { \
RTE_PMD_DEBUG_TRACE("Cannot run in secondary processes\n"); \
return; \
} \
} while (0)
/* Macros to check for invalid function pointers */
#define RTE_FUNC_PTR_OR_ERR_RET(func, retval) do { \
if ((func) == NULL) { \
RTE_PMD_DEBUG_TRACE("Function not supported\n"); \
return retval; \
} \
} while (0)
#define RTE_FUNC_PTR_OR_RET(func) do { \
if ((func) == NULL) { \
RTE_PMD_DEBUG_TRACE("Function not supported\n"); \
return; \
} \
} while (0)
/** Double linked list of device drivers. */
TAILQ_HEAD(rte_driver_list, rte_driver);
/**
* Initialization function called for each device driver once.
*/
typedef int (rte_dev_init_t)(const char *name, const char *args);
/**
* Uninitilization function called for each device driver once.
*/
typedef int (rte_dev_uninit_t)(const char *name);
/**
* Driver type enumeration
*/
enum pmd_type {
PMD_VDEV = 0,
PMD_PDEV = 1,
};
/**
* A structure describing a device driver.
*/
struct rte_driver {
TAILQ_ENTRY(rte_driver) next; /**< Next in list. */
enum pmd_type type; /**< PMD Driver type */
const char *name; /**< Driver name. */
rte_dev_init_t *init; /**< Device init. function. */
rte_dev_uninit_t *uninit; /**< Device uninit. function. */
};
/**
* Register a device driver.
*
* @param driver
* A pointer to a rte_dev structure describing the driver
* to be registered.
*/
void rte_eal_driver_register(struct rte_driver *driver);
/**
* Unregister a device driver.
*
* @param driver
* A pointer to a rte_dev structure describing the driver
* to be unregistered.
*/
void rte_eal_driver_unregister(struct rte_driver *driver);
/**
* Initalize all the registered drivers in this process
*/
int rte_eal_dev_init(void);
/**
* Initialize a driver specified by name.
*
* @param name
* The pointer to a driver name to be initialized.
* @param args
* The pointer to arguments used by driver initialization.
* @return
* 0 on success, negative on error
*/
int rte_eal_vdev_init(const char *name, const char *args);
/**
* Uninitalize a driver specified by name.
*
* @param name
* The pointer to a driver name to be initialized.
* @return
* 0 on success, negative on error
*/
int rte_eal_vdev_uninit(const char *name);
#define PMD_REGISTER_DRIVER(d)\
void devinitfn_ ##d(void);\
void __attribute__((constructor, used)) devinitfn_ ##d(void)\
{\
rte_eal_driver_register(&d);\
}
#ifdef __cplusplus
}
#endif
#endif /* _RTE_VDEV_H_ */
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