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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2016 RehiveTech. All rights reserved.
*/
#ifndef RTE_VDEV_H
#define RTE_VDEV_H
#ifdef __cplusplus
extern "C" {
#endif
#include <sys/queue.h>
#include <rte_dev.h>
#include <rte_devargs.h>
struct rte_vdev_device {
TAILQ_ENTRY(rte_vdev_device) next; /**< Next attached vdev */
struct rte_device device; /**< Inherit core device */
};
/**
* @internal
* Helper macro for drivers that need to convert to struct rte_vdev_device.
*/
#define RTE_DEV_TO_VDEV(ptr) \
container_of(ptr, struct rte_vdev_device, device)
#define RTE_DEV_TO_VDEV_CONST(ptr) \
container_of(ptr, const struct rte_vdev_device, device)
static inline const char *
rte_vdev_device_name(const struct rte_vdev_device *dev)
{
if (dev && dev->device.name)
return dev->device.name;
return NULL;
}
static inline const char *
rte_vdev_device_args(const struct rte_vdev_device *dev)
{
if (dev && dev->device.devargs)
return dev->device.devargs->args;
return "";
}
/** Double linked list of virtual device drivers. */
TAILQ_HEAD(vdev_driver_list, rte_vdev_driver);
/**
* Probe function called for each virtual device driver once.
*/
typedef int (rte_vdev_probe_t)(struct rte_vdev_device *dev);
/**
* Remove function called for each virtual device driver once.
*/
typedef int (rte_vdev_remove_t)(struct rte_vdev_device *dev);
/**
* A virtual device driver abstraction.
*/
struct rte_vdev_driver {
TAILQ_ENTRY(rte_vdev_driver) next; /**< Next in list. */
struct rte_driver driver; /**< Inherited general driver. */
rte_vdev_probe_t *probe; /**< Virtual device probe function. */
rte_vdev_remove_t *remove; /**< Virtual device remove function. */
};
/**
* Register a virtual device driver.
*
* @param driver
* A pointer to a rte_vdev_driver structure describing the driver
* to be registered.
*/
void rte_vdev_register(struct rte_vdev_driver *driver);
/**
* Unregister a virtual device driver.
*
* @param driver
* A pointer to a rte_vdev_driver structure describing the driver
* to be unregistered.
*/
void rte_vdev_unregister(struct rte_vdev_driver *driver);
#define RTE_PMD_REGISTER_VDEV(nm, vdrv)\
static const char *vdrvinit_ ## nm ## _alias;\
RTE_INIT(vdrvinitfn_ ##vdrv)\
{\
(vdrv).driver.name = RTE_STR(nm);\
(vdrv).driver.alias = vdrvinit_ ## nm ## _alias;\
rte_vdev_register(&vdrv);\
} \
RTE_PMD_EXPORT_NAME(nm, __COUNTER__)
#define RTE_PMD_REGISTER_ALIAS(nm, alias)\
static const char *vdrvinit_ ## nm ## _alias = RTE_STR(alias)
typedef void (*rte_vdev_scan_callback)(void *user_arg);
/**
* Add a callback to be called on vdev scan
* before reading the devargs list.
*
* This function cannot be called in a scan callback
* because of deadlock.
*
* @param callback
* The function to be called which can update the devargs list.
* @param user_arg
* An opaque pointer passed to callback.
* @return
* 0 on success, negative on error
*/
int
rte_vdev_add_custom_scan(rte_vdev_scan_callback callback, void *user_arg);
/**
* Remove a registered scan callback.
*
* This function cannot be called in a scan callback
* because of deadlock.
*
* @param callback
* The registered function to be removed.
* @param user_arg
* The associated opaque pointer or (void*)-1 for any.
* @return
* 0 on success
*/
int
rte_vdev_remove_custom_scan(rte_vdev_scan_callback callback, void *user_arg);
/**
* 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_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_vdev_uninit(const char *name);
#ifdef __cplusplus
}
#endif
#endif
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