1/*-
2 *   BSD LICENSE
3 *
4 *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
5 *   Copyright(c) 2014 6WIND S.A.
6 *   All rights reserved.
7 *
8 *   Redistribution and use in source and binary forms, with or without
9 *   modification, are permitted provided that the following conditions
10 *   are met:
11 *
12 *     * Redistributions of source code must retain the above copyright
13 *       notice, this list of conditions and the following disclaimer.
14 *     * Redistributions in binary form must reproduce the above copyright
15 *       notice, this list of conditions and the following disclaimer in
16 *       the documentation and/or other materials provided with the
17 *       distribution.
18 *     * Neither the name of Intel Corporation nor the names of its
19 *       contributors may be used to endorse or promote products derived
20 *       from this software without specific prior written permission.
21 *
22 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
25 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
28 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
32 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35#include <stdio.h>
36#include <string.h>
37#include <inttypes.h>
38#include <sys/queue.h>
39
40#include <rte_dev.h>
41#include <rte_devargs.h>
42#include <rte_debug.h>
43#include <rte_devargs.h>
44#include <rte_log.h>
45
46#include "eal_private.h"
47
48/** Global list of device drivers. */
49static struct rte_driver_list dev_driver_list =
50	TAILQ_HEAD_INITIALIZER(dev_driver_list);
51/** Global list of device drivers. */
52static struct rte_device_list dev_device_list =
53	TAILQ_HEAD_INITIALIZER(dev_device_list);
54
55/* register a driver */
56void
57rte_eal_driver_register(struct rte_driver *driver)
58{
59	TAILQ_INSERT_TAIL(&dev_driver_list, driver, next);
60}
61
62/* unregister a driver */
63void
64rte_eal_driver_unregister(struct rte_driver *driver)
65{
66	TAILQ_REMOVE(&dev_driver_list, driver, next);
67}
68
69void rte_eal_device_insert(struct rte_device *dev)
70{
71	TAILQ_INSERT_TAIL(&dev_device_list, dev, next);
72}
73
74void rte_eal_device_remove(struct rte_device *dev)
75{
76	TAILQ_REMOVE(&dev_device_list, dev, next);
77}
78
79int
80rte_eal_dev_init(void)
81{
82	struct rte_devargs *devargs;
83
84	/*
85	 * Note that the dev_driver_list is populated here
86	 * from calls made to rte_eal_driver_register from constructor functions
87	 * embedded into PMD modules via the RTE_PMD_REGISTER_VDEV macro
88	 */
89
90	/* call the init function for each virtual device */
91	TAILQ_FOREACH(devargs, &devargs_list, next) {
92
93		if (devargs->type != RTE_DEVTYPE_VIRTUAL)
94			continue;
95
96		if (rte_eal_vdev_init(devargs->virt.drv_name,
97					devargs->args)) {
98			RTE_LOG(ERR, EAL, "failed to initialize %s device\n",
99					devargs->virt.drv_name);
100			return -1;
101		}
102	}
103
104	return 0;
105}
106
107int rte_eal_dev_attach(const char *name, const char *devargs)
108{
109	struct rte_pci_addr addr;
110
111	if (name == NULL || devargs == NULL) {
112		RTE_LOG(ERR, EAL, "Invalid device or arguments provided\n");
113		return -EINVAL;
114	}
115
116	if (eal_parse_pci_DomBDF(name, &addr) == 0) {
117		if (rte_eal_pci_probe_one(&addr) < 0)
118			goto err;
119
120	} else {
121		if (rte_eal_vdev_init(name, devargs))
122			goto err;
123	}
124
125	return 0;
126
127err:
128	RTE_LOG(ERR, EAL, "Driver cannot attach the device (%s)\n", name);
129	return -EINVAL;
130}
131
132int rte_eal_dev_detach(const char *name)
133{
134	struct rte_pci_addr addr;
135
136	if (name == NULL) {
137		RTE_LOG(ERR, EAL, "Invalid device provided.\n");
138		return -EINVAL;
139	}
140
141	if (eal_parse_pci_DomBDF(name, &addr) == 0) {
142		if (rte_eal_pci_detach(&addr) < 0)
143			goto err;
144	} else {
145		if (rte_eal_vdev_uninit(name))
146			goto err;
147	}
148	return 0;
149
150err:
151	RTE_LOG(ERR, EAL, "Driver cannot detach the device (%s)\n", name);
152	return -EINVAL;
153}
154