1/*-
2 *   BSD LICENSE
3 *
4 *   Copyright(c) 2016 RehiveTech. All rights reserved.
5 *
6 *   Redistribution and use in source and binary forms, with or without
7 *   modification, are permitted provided that the following conditions
8 *   are met:
9 *
10 *     * Redistributions of source code must retain the above copyright
11 *       notice, this list of conditions and the following disclaimer.
12 *     * Redistributions in binary form must reproduce the above copyright
13 *       notice, this list of conditions and the following disclaimer in
14 *       the documentation and/or other materials provided with the
15 *       distribution.
16 *     * Neither the name of RehiveTech nor the names of its
17 *       contributors may be used to endorse or promote products derived
18 *       from this software without specific prior written permission.
19 *
20 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#include <string.h>
34#include <inttypes.h>
35#include <stdio.h>
36#include <stdlib.h>
37#include <stdint.h>
38#include <sys/queue.h>
39
40#include <rte_vdev.h>
41#include <rte_common.h>
42
43struct vdev_driver_list vdev_driver_list =
44	TAILQ_HEAD_INITIALIZER(vdev_driver_list);
45
46/* register a driver */
47void
48rte_eal_vdrv_register(struct rte_vdev_driver *driver)
49{
50	TAILQ_INSERT_TAIL(&vdev_driver_list, driver, next);
51	rte_eal_driver_register(&driver->driver);
52}
53
54/* unregister a driver */
55void
56rte_eal_vdrv_unregister(struct rte_vdev_driver *driver)
57{
58	rte_eal_driver_unregister(&driver->driver);
59	TAILQ_REMOVE(&vdev_driver_list, driver, next);
60}
61
62int
63rte_eal_vdev_init(const char *name, const char *args)
64{
65	struct rte_vdev_driver *driver;
66
67	if (name == NULL)
68		return -EINVAL;
69
70	TAILQ_FOREACH(driver, &vdev_driver_list, next) {
71		/*
72		 * search a driver prefix in virtual device name.
73		 * For example, if the driver is pcap PMD, driver->name
74		 * will be "net_pcap", but "name" will be "net_pcapN".
75		 * So use strncmp to compare.
76		 */
77		if (!strncmp(driver->driver.name, name,
78			    strlen(driver->driver.name)))
79			return driver->probe(name, args);
80	}
81
82	/* Give new names precedence over aliases. */
83	TAILQ_FOREACH(driver, &vdev_driver_list, next) {
84		if (driver->driver.alias &&
85		    !strncmp(driver->driver.alias, name,
86			    strlen(driver->driver.alias)))
87			return driver->probe(name, args);
88	}
89
90	RTE_LOG(ERR, EAL, "no driver found for %s\n", name);
91	return -EINVAL;
92}
93
94int
95rte_eal_vdev_uninit(const char *name)
96{
97	struct rte_vdev_driver *driver;
98
99	if (name == NULL)
100		return -EINVAL;
101
102	TAILQ_FOREACH(driver, &vdev_driver_list, next) {
103		/*
104		 * search a driver prefix in virtual device name.
105		 * For example, if the driver is pcap PMD, driver->name
106		 * will be "net_pcap", but "name" will be "net_pcapN".
107		 * So use strncmp to compare.
108		 */
109		if (!strncmp(driver->driver.name, name,
110			     strlen(driver->driver.name)))
111			return driver->remove(name);
112	}
113
114	/* Give new names precedence over aliases. */
115	TAILQ_FOREACH(driver, &vdev_driver_list, next) {
116		if (driver->driver.alias &&
117		    !strncmp(driver->driver.alias, name,
118			    strlen(driver->driver.alias)))
119			return driver->remove(name);
120	}
121
122	RTE_LOG(ERR, EAL, "no driver found for %s\n", name);
123	return -EINVAL;
124}
125