summaryrefslogtreecommitdiff
path: root/lib/librte_ethdev/rte_class_eth.c
blob: e554668dac89e3332d0fd4864f747e71d0f47a14 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2018 Gaƫtan Rivet
 */

#include <string.h>

#include <cmdline_parse_etheraddr.h>
#include <rte_class.h>
#include <rte_compat.h>
#include <rte_errno.h>
#include <rte_kvargs.h>
#include <rte_log.h>

#include "rte_ethdev.h"
#include "rte_ethdev_core.h"
#include "rte_ethdev_driver.h"
#include "ethdev_private.h"

enum eth_params {
	RTE_ETH_PARAM_MAC,
	RTE_ETH_PARAM_REPRESENTOR,
	RTE_ETH_PARAM_MAX,
};

static const char * const eth_params_keys[] = {
	[RTE_ETH_PARAM_MAC] = "mac",
	[RTE_ETH_PARAM_REPRESENTOR] = "representor",
	[RTE_ETH_PARAM_MAX] = NULL,
};

struct eth_dev_match_arg {
	struct rte_device *device;
	struct rte_kvargs *kvlist;
};

#define eth_dev_match_arg(d, k) \
	(&(const struct eth_dev_match_arg) { \
		.device = (d), \
		.kvlist = (k), \
	})

static int
eth_mac_cmp(const char *key __rte_unused,
		const char *value, void *opaque)
{
	int ret;
	struct rte_ether_addr mac;
	const struct rte_eth_dev_data *data = opaque;
	struct rte_eth_dev_info dev_info;
	uint32_t index;

	/* Parse devargs MAC address. */
	/*
	 * cannot use ether_aton_r(value, &mac)
	 * because of include conflict with rte_ether.h
	 */
	ret = cmdline_parse_etheraddr(NULL, value, &mac, sizeof(mac));
	if (ret < 0)
		return -1; /* invalid devargs value */

	/* Return 0 if devargs MAC is matching one of the device MACs. */
	rte_eth_dev_info_get(data->port_id, &dev_info);
	for (index = 0; index < dev_info.max_mac_addrs; index++)
		if (is_same_ether_addr(&mac, &data->mac_addrs[index]))
			return 0;
	return -1; /* no match */
}

static int
eth_representor_cmp(const char *key __rte_unused,
		const char *value, void *opaque)
{
	int ret;
	char *values;
	const struct rte_eth_dev_data *data = opaque;
	struct rte_eth_devargs representors;
	uint16_t index;

	if ((data->dev_flags & RTE_ETH_DEV_REPRESENTOR) == 0)
		return -1; /* not a representor port */

	/* Parse devargs representor values. */
	values = strdup(value);
	if (values == NULL)
		return -1;
	memset(&representors, 0, sizeof(representors));
	ret = rte_eth_devargs_parse_list(values,
			rte_eth_devargs_parse_representor_ports,
			&representors);
	free(values);
	if (ret != 0)
		return -1; /* invalid devargs value */

	/* Return 0 if representor id is matching one of the values. */
	for (index = 0; index < representors.nb_representor_ports; index++)
		if (data->representor_id ==
				representors.representor_ports[index])
			return 0;
	return -1; /* no match */
}

static int
eth_dev_match(const struct rte_eth_dev *edev,
	      const void *_arg)
{
	int ret;
	const struct eth_dev_match_arg *arg = _arg;
	const struct rte_kvargs *kvlist = arg->kvlist;
	unsigned int pair;

	if (edev->state == RTE_ETH_DEV_UNUSED)
		return -1;
	if (arg->device != NULL && arg->device != edev->device)
		return -1;

	ret = rte_kvargs_process(kvlist,
			eth_params_keys[RTE_ETH_PARAM_MAC],
			eth_mac_cmp, edev->data);
	if (ret != 0)
		return -1;

	ret = rte_kvargs_process(kvlist,
			eth_params_keys[RTE_ETH_PARAM_REPRESENTOR],
			eth_representor_cmp, edev->data);
	if (ret != 0)
		return -1;
	/* search for representor key */
	for (pair = 0; pair < kvlist->count; pair++) {
		ret = strcmp(kvlist->pairs[pair].key,
				eth_params_keys[RTE_ETH_PARAM_REPRESENTOR]);
		if (ret == 0)
			break; /* there is a representor key */
	}
	/* if no representor key, default is to not match representor ports */
	if (ret != 0)
		if ((edev->data->dev_flags & RTE_ETH_DEV_REPRESENTOR) != 0)
			return -1; /* do not match any representor */

	return 0;
}

static void *
eth_dev_iterate(const void *start,
		const char *str,
		const struct rte_dev_iterator *it)
{
	struct rte_kvargs *kvargs = NULL;
	struct rte_eth_dev *edev = NULL;
	const char * const *valid_keys = NULL;

	if (str != NULL) {
		if (str[0] == '+') /* no validation of keys */
			str++;
		else
			valid_keys = eth_params_keys;
		kvargs = rte_kvargs_parse(str, valid_keys);
		if (kvargs == NULL) {
			RTE_LOG(ERR, EAL, "cannot parse argument list\n");
			rte_errno = EINVAL;
			return NULL;
		}
	}
	edev = eth_find_device(start, eth_dev_match,
			       eth_dev_match_arg(it->device, kvargs));
	rte_kvargs_free(kvargs);
	return edev;
}

static struct rte_class rte_class_eth = {
	.dev_iterate = eth_dev_iterate,
};

RTE_REGISTER_CLASS(eth, rte_class_eth);