drivers: use vdev registration
[dpdk.git] / lib / librte_eal / common / eal_common_vdev.c
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
43 struct vdev_driver_list vdev_driver_list =
44         TAILQ_HEAD_INITIALIZER(vdev_driver_list);
45
46 /* register a driver */
47 void
48 rte_eal_vdrv_register(struct rte_vdev_driver *driver)
49 {
50         TAILQ_INSERT_TAIL(&vdev_driver_list, driver, next);
51 }
52
53 /* unregister a driver */
54 void
55 rte_eal_vdrv_unregister(struct rte_vdev_driver *driver)
56 {
57         TAILQ_REMOVE(&vdev_driver_list, driver, next);
58 }
59
60 int
61 rte_eal_vdev_init(const char *name, const char *args)
62 {
63         struct rte_vdev_driver *driver;
64
65         if (name == NULL)
66                 return -EINVAL;
67
68         TAILQ_FOREACH(driver, &vdev_driver_list, next) {
69                 /*
70                  * search a driver prefix in virtual device name.
71                  * For example, if the driver is pcap PMD, driver->name
72                  * will be "eth_pcap", but "name" will be "eth_pcapN".
73                  * So use strncmp to compare.
74                  */
75                 if (!strncmp(driver->driver.name, name,
76                             strlen(driver->driver.name)))
77                         return driver->init(name, args);
78         }
79
80         RTE_LOG(ERR, EAL, "no driver found for %s\n", name);
81         return -EINVAL;
82 }
83
84 int
85 rte_eal_vdev_uninit(const char *name)
86 {
87         struct rte_vdev_driver *driver;
88
89         if (name == NULL)
90                 return -EINVAL;
91
92         TAILQ_FOREACH(driver, &vdev_driver_list, next) {
93                 /*
94                  * search a driver prefix in virtual device name.
95                  * For example, if the driver is pcap PMD, driver->name
96                  * will be "eth_pcap", but "name" will be "eth_pcapN".
97                  * So use strncmp to compare.
98                  */
99                 if (!strncmp(driver->driver.name, name,
100                              strlen(driver->driver.name)))
101                         return driver->uninit(name);
102         }
103
104         RTE_LOG(ERR, EAL, "no driver found for %s\n", name);
105         return -EINVAL;
106 }