1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2018 Intel Corporation
3 */
4
5 #include <stdlib.h>
6 #include <string.h>
7
8 #include <rte_ethdev.h>
9 #include <rte_bus_pci.h>
10 #include <rte_string_fns.h>
11
12 #include "kni.h"
13 #include "mempool.h"
14 #include "link.h"
15
16 static struct kni_list kni_list;
17
18 #ifndef KNI_MAX
19 #define KNI_MAX 16
20 #endif
21
22 int
kni_init(void)23 kni_init(void)
24 {
25 TAILQ_INIT(&kni_list);
26
27 #ifdef RTE_LIB_KNI
28 rte_kni_init(KNI_MAX);
29 #endif
30
31 return 0;
32 }
33
34 struct kni *
kni_find(const char * name)35 kni_find(const char *name)
36 {
37 struct kni *kni;
38
39 if (name == NULL)
40 return NULL;
41
42 TAILQ_FOREACH(kni, &kni_list, node)
43 if (strcmp(kni->name, name) == 0)
44 return kni;
45
46 return NULL;
47 }
48
49 #ifndef RTE_LIB_KNI
50
51 struct kni *
kni_create(const char * name __rte_unused,struct kni_params * params __rte_unused)52 kni_create(const char *name __rte_unused,
53 struct kni_params *params __rte_unused)
54 {
55 return NULL;
56 }
57
58 void
kni_handle_request(void)59 kni_handle_request(void)
60 {
61 return;
62 }
63
64 #else
65
66 static int
kni_config_network_interface(uint16_t port_id,uint8_t if_up)67 kni_config_network_interface(uint16_t port_id, uint8_t if_up)
68 {
69 int ret = 0;
70
71 if (!rte_eth_dev_is_valid_port(port_id))
72 return -EINVAL;
73
74 ret = (if_up) ?
75 rte_eth_dev_set_link_up(port_id) :
76 rte_eth_dev_set_link_down(port_id);
77
78 return ret;
79 }
80
81 static int
kni_change_mtu(uint16_t port_id,unsigned int new_mtu)82 kni_change_mtu(uint16_t port_id, unsigned int new_mtu)
83 {
84 int ret;
85
86 if (!rte_eth_dev_is_valid_port(port_id))
87 return -EINVAL;
88
89 if (new_mtu > RTE_ETHER_MAX_LEN)
90 return -EINVAL;
91
92 /* Set new MTU */
93 ret = rte_eth_dev_set_mtu(port_id, new_mtu);
94 if (ret < 0)
95 return ret;
96
97 return 0;
98 }
99
100 struct kni *
kni_create(const char * name,struct kni_params * params)101 kni_create(const char *name, struct kni_params *params)
102 {
103 struct rte_eth_dev_info dev_info;
104 struct rte_kni_conf kni_conf;
105 struct rte_kni_ops kni_ops;
106 struct kni *kni;
107 struct mempool *mempool;
108 struct link *link;
109 struct rte_kni *k;
110 const struct rte_pci_device *pci_dev;
111 const struct rte_bus *bus = NULL;
112 int ret;
113
114 /* Check input params */
115 if ((name == NULL) ||
116 kni_find(name) ||
117 (params == NULL))
118 return NULL;
119
120 mempool = mempool_find(params->mempool_name);
121 link = link_find(params->link_name);
122 if ((mempool == NULL) ||
123 (link == NULL))
124 return NULL;
125
126 /* Resource create */
127 ret = rte_eth_dev_info_get(link->port_id, &dev_info);
128 if (ret != 0)
129 return NULL;
130
131 memset(&kni_conf, 0, sizeof(kni_conf));
132 strlcpy(kni_conf.name, name, RTE_KNI_NAMESIZE);
133 kni_conf.force_bind = params->force_bind;
134 kni_conf.core_id = params->thread_id;
135 kni_conf.group_id = link->port_id;
136 kni_conf.mbuf_size = mempool->buffer_size;
137 if (dev_info.device)
138 bus = rte_bus_find_by_device(dev_info.device);
139 if (bus && !strcmp(bus->name, "pci")) {
140 pci_dev = RTE_DEV_TO_PCI(dev_info.device);
141 kni_conf.addr = pci_dev->addr;
142 kni_conf.id = pci_dev->id;
143 }
144
145 memset(&kni_ops, 0, sizeof(kni_ops));
146 kni_ops.port_id = link->port_id;
147 kni_ops.config_network_if = kni_config_network_interface;
148 kni_ops.change_mtu = kni_change_mtu;
149
150 k = rte_kni_alloc(mempool->m, &kni_conf, &kni_ops);
151 if (k == NULL)
152 return NULL;
153
154 /* Node allocation */
155 kni = calloc(1, sizeof(struct kni));
156 if (kni == NULL)
157 return NULL;
158
159 /* Node fill in */
160 strlcpy(kni->name, name, sizeof(kni->name));
161 kni->k = k;
162
163 /* Node add to list */
164 TAILQ_INSERT_TAIL(&kni_list, kni, node);
165
166 return kni;
167 }
168
169 void
kni_handle_request(void)170 kni_handle_request(void)
171 {
172 struct kni *kni;
173
174 TAILQ_FOREACH(kni, &kni_list, node)
175 rte_kni_handle_request(kni->k);
176 }
177
178 #endif
179