1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2018 Gaëtan Rivet
3 */
4
5 #include <string.h>
6
7 #include <rte_class.h>
8 #include <rte_compat.h>
9 #include <rte_errno.h>
10 #include <rte_kvargs.h>
11 #include <rte_log.h>
12
13 #include "rte_ethdev.h"
14 #include "rte_ethdev_core.h"
15 #include "rte_ethdev_driver.h"
16 #include "ethdev_private.h"
17
18 enum eth_params {
19 RTE_ETH_PARAM_MAC,
20 RTE_ETH_PARAM_REPRESENTOR,
21 RTE_ETH_PARAM_MAX,
22 };
23
24 static const char * const eth_params_keys[] = {
25 [RTE_ETH_PARAM_MAC] = "mac",
26 [RTE_ETH_PARAM_REPRESENTOR] = "representor",
27 [RTE_ETH_PARAM_MAX] = NULL,
28 };
29
30 struct eth_dev_match_arg {
31 struct rte_device *device;
32 struct rte_kvargs *kvlist;
33 };
34
35 #define eth_dev_match_arg(d, k) \
36 (&(const struct eth_dev_match_arg) { \
37 .device = (d), \
38 .kvlist = (k), \
39 })
40
41 static int
eth_mac_cmp(const char * key __rte_unused,const char * value,void * opaque)42 eth_mac_cmp(const char *key __rte_unused,
43 const char *value, void *opaque)
44 {
45 struct rte_ether_addr mac;
46 const struct rte_eth_dev_data *data = opaque;
47 struct rte_eth_dev_info dev_info;
48 uint32_t index;
49
50 /* Parse devargs MAC address. */
51 if (rte_ether_unformat_addr(value, &mac) < 0)
52 return -1; /* invalid devargs value */
53
54 /* Return 0 if devargs MAC is matching one of the device MACs. */
55 rte_eth_dev_info_get(data->port_id, &dev_info);
56 for (index = 0; index < dev_info.max_mac_addrs; index++)
57 if (rte_is_same_ether_addr(&mac, &data->mac_addrs[index]))
58 return 0;
59 return -1; /* no match */
60 }
61
62 static int
eth_representor_cmp(const char * key __rte_unused,const char * value,void * opaque)63 eth_representor_cmp(const char *key __rte_unused,
64 const char *value, void *opaque)
65 {
66 int ret;
67 char *values;
68 const struct rte_eth_dev_data *data = opaque;
69 struct rte_eth_devargs representors;
70 uint16_t index;
71
72 if ((data->dev_flags & RTE_ETH_DEV_REPRESENTOR) == 0)
73 return -1; /* not a representor port */
74
75 /* Parse devargs representor values. */
76 values = strdup(value);
77 if (values == NULL)
78 return -1;
79 memset(&representors, 0, sizeof(representors));
80 ret = rte_eth_devargs_parse_list(values,
81 rte_eth_devargs_parse_representor_ports,
82 &representors);
83 free(values);
84 if (ret != 0)
85 return -1; /* invalid devargs value */
86
87 /* Return 0 if representor id is matching one of the values. */
88 for (index = 0; index < representors.nb_representor_ports; index++)
89 if (data->representor_id ==
90 representors.representor_ports[index])
91 return 0;
92 return -1; /* no match */
93 }
94
95 static int
eth_dev_match(const struct rte_eth_dev * edev,const void * _arg)96 eth_dev_match(const struct rte_eth_dev *edev,
97 const void *_arg)
98 {
99 int ret;
100 const struct eth_dev_match_arg *arg = _arg;
101 const struct rte_kvargs *kvlist = arg->kvlist;
102 unsigned int pair;
103
104 if (edev->state == RTE_ETH_DEV_UNUSED)
105 return -1;
106 if (arg->device != NULL && arg->device != edev->device)
107 return -1;
108
109 ret = rte_kvargs_process(kvlist,
110 eth_params_keys[RTE_ETH_PARAM_MAC],
111 eth_mac_cmp, edev->data);
112 if (ret != 0)
113 return -1;
114
115 ret = rte_kvargs_process(kvlist,
116 eth_params_keys[RTE_ETH_PARAM_REPRESENTOR],
117 eth_representor_cmp, edev->data);
118 if (ret != 0)
119 return -1;
120 /* search for representor key */
121 for (pair = 0; pair < kvlist->count; pair++) {
122 ret = strcmp(kvlist->pairs[pair].key,
123 eth_params_keys[RTE_ETH_PARAM_REPRESENTOR]);
124 if (ret == 0)
125 break; /* there is a representor key */
126 }
127 /* if no representor key, default is to not match representor ports */
128 if (ret != 0)
129 if ((edev->data->dev_flags & RTE_ETH_DEV_REPRESENTOR) != 0)
130 return -1; /* do not match any representor */
131
132 return 0;
133 }
134
135 static void *
eth_dev_iterate(const void * start,const char * str,const struct rte_dev_iterator * it)136 eth_dev_iterate(const void *start,
137 const char *str,
138 const struct rte_dev_iterator *it)
139 {
140 struct rte_kvargs *kvargs = NULL;
141 struct rte_eth_dev *edev = NULL;
142 const char * const *valid_keys = NULL;
143
144 if (str != NULL) {
145 if (str[0] == '+') /* no validation of keys */
146 str++;
147 else
148 valid_keys = eth_params_keys;
149 kvargs = rte_kvargs_parse(str, valid_keys);
150 if (kvargs == NULL) {
151 RTE_LOG(ERR, EAL, "cannot parse argument list\n");
152 rte_errno = EINVAL;
153 return NULL;
154 }
155 }
156 edev = eth_find_device(start, eth_dev_match,
157 eth_dev_match_arg(it->device, kvargs));
158 rte_kvargs_free(kvargs);
159 return edev;
160 }
161
162 static struct rte_class rte_class_eth = {
163 .dev_iterate = eth_dev_iterate,
164 };
165
166 RTE_REGISTER_CLASS(eth, rte_class_eth);
167