1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2016 RehiveTech. All rights reserved.
18 #include <sys/queue.h>
20 #include <rte_devargs.h>
22 struct rte_vdev_device {
23 TAILQ_ENTRY(rte_vdev_device) next; /**< Next attached vdev */
24 struct rte_device device; /**< Inherit core device */
29 * Helper macro for drivers that need to convert to struct rte_vdev_device.
31 #define RTE_DEV_TO_VDEV(ptr) \
32 container_of(ptr, struct rte_vdev_device, device)
34 #define RTE_DEV_TO_VDEV_CONST(ptr) \
35 container_of(ptr, const struct rte_vdev_device, device)
37 static inline const char *
38 rte_vdev_device_name(const struct rte_vdev_device *dev)
40 if (dev && dev->device.name)
41 return dev->device.name;
45 static inline const char *
46 rte_vdev_device_args(const struct rte_vdev_device *dev)
48 if (dev && dev->device.devargs)
49 return dev->device.devargs->args;
53 /** Double linked list of virtual device drivers. */
54 TAILQ_HEAD(vdev_driver_list, rte_vdev_driver);
57 * Probe function called for each virtual device driver once.
59 typedef int (rte_vdev_probe_t)(struct rte_vdev_device *dev);
62 * Remove function called for each virtual device driver once.
64 typedef int (rte_vdev_remove_t)(struct rte_vdev_device *dev);
67 * A virtual device driver abstraction.
69 struct rte_vdev_driver {
70 TAILQ_ENTRY(rte_vdev_driver) next; /**< Next in list. */
71 struct rte_driver driver; /**< Inherited general driver. */
72 rte_vdev_probe_t *probe; /**< Virtual device probe function. */
73 rte_vdev_remove_t *remove; /**< Virtual device remove function. */
77 * Register a virtual device driver.
80 * A pointer to a rte_vdev_driver structure describing the driver
83 void rte_vdev_register(struct rte_vdev_driver *driver);
86 * Unregister a virtual device driver.
89 * A pointer to a rte_vdev_driver structure describing the driver
92 void rte_vdev_unregister(struct rte_vdev_driver *driver);
94 #define RTE_PMD_REGISTER_VDEV(nm, vdrv)\
95 static const char *vdrvinit_ ## nm ## _alias;\
96 RTE_INIT(vdrvinitfn_ ##vdrv)\
98 (vdrv).driver.name = RTE_STR(nm);\
99 (vdrv).driver.alias = vdrvinit_ ## nm ## _alias;\
100 rte_vdev_register(&vdrv);\
102 RTE_PMD_EXPORT_NAME(nm, __COUNTER__)
104 #define RTE_PMD_REGISTER_ALIAS(nm, alias)\
105 static const char *vdrvinit_ ## nm ## _alias = RTE_STR(alias)
107 typedef void (*rte_vdev_scan_callback)(void *user_arg);
110 * Add a callback to be called on vdev scan
111 * before reading the devargs list.
113 * This function cannot be called in a scan callback
114 * because of deadlock.
117 * The function to be called which can update the devargs list.
119 * An opaque pointer passed to callback.
121 * 0 on success, negative on error
124 rte_vdev_add_custom_scan(rte_vdev_scan_callback callback, void *user_arg);
127 * Remove a registered scan callback.
129 * This function cannot be called in a scan callback
130 * because of deadlock.
133 * The registered function to be removed.
135 * The associated opaque pointer or (void*)-1 for any.
140 rte_vdev_remove_custom_scan(rte_vdev_scan_callback callback, void *user_arg);
143 * Initialize a driver specified by name.
146 * The pointer to a driver name to be initialized.
148 * The pointer to arguments used by driver initialization.
150 * 0 on success, negative on error
152 int rte_vdev_init(const char *name, const char *args);
155 * Uninitalize a driver specified by name.
158 * The pointer to a driver name to be initialized.
160 * 0 on success, negative on error
162 int rte_vdev_uninit(const char *name);