1 /* 2 * Copyright (C) 2017 Netronome Systems, Inc. 3 * 4 * This software is licensed under the GNU General License Version 2, 5 * June 1991 as shown in the file COPYING in the top-level directory of this 6 * source tree. 7 * 8 * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" 9 * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, 10 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 11 * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE 12 * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME 13 * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 14 */ 15 16 #include <linux/debugfs.h> 17 #include <linux/etherdevice.h> 18 #include <linux/kernel.h> 19 #include <linux/module.h> 20 #include <linux/netdevice.h> 21 #include <linux/slab.h> 22 #include <net/netlink.h> 23 #include <net/pkt_cls.h> 24 #include <net/rtnetlink.h> 25 26 #include "netdevsim.h" 27 28 static netdev_tx_t nsim_start_xmit(struct sk_buff *skb, struct net_device *dev) 29 { 30 struct netdevsim *ns = netdev_priv(dev); 31 32 if (!nsim_ipsec_tx(ns, skb)) 33 goto out; 34 35 u64_stats_update_begin(&ns->syncp); 36 ns->tx_packets++; 37 ns->tx_bytes += skb->len; 38 u64_stats_update_end(&ns->syncp); 39 40 out: 41 dev_kfree_skb(skb); 42 43 return NETDEV_TX_OK; 44 } 45 46 static void nsim_set_rx_mode(struct net_device *dev) 47 { 48 } 49 50 static int nsim_change_mtu(struct net_device *dev, int new_mtu) 51 { 52 struct netdevsim *ns = netdev_priv(dev); 53 54 if (ns->xdp.prog && new_mtu > NSIM_XDP_MAX_MTU) 55 return -EBUSY; 56 57 dev->mtu = new_mtu; 58 59 return 0; 60 } 61 62 static void 63 nsim_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 64 { 65 struct netdevsim *ns = netdev_priv(dev); 66 unsigned int start; 67 68 do { 69 start = u64_stats_fetch_begin(&ns->syncp); 70 stats->tx_bytes = ns->tx_bytes; 71 stats->tx_packets = ns->tx_packets; 72 } while (u64_stats_fetch_retry(&ns->syncp, start)); 73 } 74 75 static int 76 nsim_setup_tc_block_cb(enum tc_setup_type type, void *type_data, void *cb_priv) 77 { 78 return nsim_bpf_setup_tc_block_cb(type, type_data, cb_priv); 79 } 80 81 static int nsim_set_vf_mac(struct net_device *dev, int vf, u8 *mac) 82 { 83 struct netdevsim *ns = netdev_priv(dev); 84 struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev; 85 86 /* Only refuse multicast addresses, zero address can mean unset/any. */ 87 if (vf >= nsim_bus_dev->num_vfs || is_multicast_ether_addr(mac)) 88 return -EINVAL; 89 memcpy(nsim_bus_dev->vfconfigs[vf].vf_mac, mac, ETH_ALEN); 90 91 return 0; 92 } 93 94 static int nsim_set_vf_vlan(struct net_device *dev, int vf, 95 u16 vlan, u8 qos, __be16 vlan_proto) 96 { 97 struct netdevsim *ns = netdev_priv(dev); 98 struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev; 99 100 if (vf >= nsim_bus_dev->num_vfs || vlan > 4095 || qos > 7) 101 return -EINVAL; 102 103 nsim_bus_dev->vfconfigs[vf].vlan = vlan; 104 nsim_bus_dev->vfconfigs[vf].qos = qos; 105 nsim_bus_dev->vfconfigs[vf].vlan_proto = vlan_proto; 106 107 return 0; 108 } 109 110 static int nsim_set_vf_rate(struct net_device *dev, int vf, int min, int max) 111 { 112 struct netdevsim *ns = netdev_priv(dev); 113 struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev; 114 115 if (vf >= nsim_bus_dev->num_vfs) 116 return -EINVAL; 117 118 nsim_bus_dev->vfconfigs[vf].min_tx_rate = min; 119 nsim_bus_dev->vfconfigs[vf].max_tx_rate = max; 120 121 return 0; 122 } 123 124 static int nsim_set_vf_spoofchk(struct net_device *dev, int vf, bool val) 125 { 126 struct netdevsim *ns = netdev_priv(dev); 127 struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev; 128 129 if (vf >= nsim_bus_dev->num_vfs) 130 return -EINVAL; 131 nsim_bus_dev->vfconfigs[vf].spoofchk_enabled = val; 132 133 return 0; 134 } 135 136 static int nsim_set_vf_rss_query_en(struct net_device *dev, int vf, bool val) 137 { 138 struct netdevsim *ns = netdev_priv(dev); 139 struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev; 140 141 if (vf >= nsim_bus_dev->num_vfs) 142 return -EINVAL; 143 nsim_bus_dev->vfconfigs[vf].rss_query_enabled = val; 144 145 return 0; 146 } 147 148 static int nsim_set_vf_trust(struct net_device *dev, int vf, bool val) 149 { 150 struct netdevsim *ns = netdev_priv(dev); 151 struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev; 152 153 if (vf >= nsim_bus_dev->num_vfs) 154 return -EINVAL; 155 nsim_bus_dev->vfconfigs[vf].trusted = val; 156 157 return 0; 158 } 159 160 static int 161 nsim_get_vf_config(struct net_device *dev, int vf, struct ifla_vf_info *ivi) 162 { 163 struct netdevsim *ns = netdev_priv(dev); 164 struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev; 165 166 if (vf >= nsim_bus_dev->num_vfs) 167 return -EINVAL; 168 169 ivi->vf = vf; 170 ivi->linkstate = nsim_bus_dev->vfconfigs[vf].link_state; 171 ivi->min_tx_rate = nsim_bus_dev->vfconfigs[vf].min_tx_rate; 172 ivi->max_tx_rate = nsim_bus_dev->vfconfigs[vf].max_tx_rate; 173 ivi->vlan = nsim_bus_dev->vfconfigs[vf].vlan; 174 ivi->vlan_proto = nsim_bus_dev->vfconfigs[vf].vlan_proto; 175 ivi->qos = nsim_bus_dev->vfconfigs[vf].qos; 176 memcpy(&ivi->mac, nsim_bus_dev->vfconfigs[vf].vf_mac, ETH_ALEN); 177 ivi->spoofchk = nsim_bus_dev->vfconfigs[vf].spoofchk_enabled; 178 ivi->trusted = nsim_bus_dev->vfconfigs[vf].trusted; 179 ivi->rss_query_en = nsim_bus_dev->vfconfigs[vf].rss_query_enabled; 180 181 return 0; 182 } 183 184 static int nsim_set_vf_link_state(struct net_device *dev, int vf, int state) 185 { 186 struct netdevsim *ns = netdev_priv(dev); 187 struct nsim_bus_dev *nsim_bus_dev = ns->nsim_bus_dev; 188 189 if (vf >= nsim_bus_dev->num_vfs) 190 return -EINVAL; 191 192 switch (state) { 193 case IFLA_VF_LINK_STATE_AUTO: 194 case IFLA_VF_LINK_STATE_ENABLE: 195 case IFLA_VF_LINK_STATE_DISABLE: 196 break; 197 default: 198 return -EINVAL; 199 } 200 201 nsim_bus_dev->vfconfigs[vf].link_state = state; 202 203 return 0; 204 } 205 206 static LIST_HEAD(nsim_block_cb_list); 207 208 static int 209 nsim_setup_tc(struct net_device *dev, enum tc_setup_type type, void *type_data) 210 { 211 struct netdevsim *ns = netdev_priv(dev); 212 213 switch (type) { 214 case TC_SETUP_BLOCK: 215 return flow_block_cb_setup_simple(type_data, 216 &nsim_block_cb_list, 217 nsim_setup_tc_block_cb, 218 ns, ns, true); 219 default: 220 return -EOPNOTSUPP; 221 } 222 } 223 224 static int 225 nsim_set_features(struct net_device *dev, netdev_features_t features) 226 { 227 struct netdevsim *ns = netdev_priv(dev); 228 229 if ((dev->features & NETIF_F_HW_TC) > (features & NETIF_F_HW_TC)) 230 return nsim_bpf_disable_tc(ns); 231 232 return 0; 233 } 234 235 static struct devlink_port *nsim_get_devlink_port(struct net_device *dev) 236 { 237 struct netdevsim *ns = netdev_priv(dev); 238 239 return &ns->nsim_dev_port->devlink_port; 240 } 241 242 static const struct net_device_ops nsim_netdev_ops = { 243 .ndo_start_xmit = nsim_start_xmit, 244 .ndo_set_rx_mode = nsim_set_rx_mode, 245 .ndo_set_mac_address = eth_mac_addr, 246 .ndo_validate_addr = eth_validate_addr, 247 .ndo_change_mtu = nsim_change_mtu, 248 .ndo_get_stats64 = nsim_get_stats64, 249 .ndo_set_vf_mac = nsim_set_vf_mac, 250 .ndo_set_vf_vlan = nsim_set_vf_vlan, 251 .ndo_set_vf_rate = nsim_set_vf_rate, 252 .ndo_set_vf_spoofchk = nsim_set_vf_spoofchk, 253 .ndo_set_vf_trust = nsim_set_vf_trust, 254 .ndo_get_vf_config = nsim_get_vf_config, 255 .ndo_set_vf_link_state = nsim_set_vf_link_state, 256 .ndo_set_vf_rss_query_en = nsim_set_vf_rss_query_en, 257 .ndo_setup_tc = nsim_setup_tc, 258 .ndo_set_features = nsim_set_features, 259 .ndo_bpf = nsim_bpf, 260 .ndo_get_devlink_port = nsim_get_devlink_port, 261 }; 262 263 static void nsim_setup(struct net_device *dev) 264 { 265 ether_setup(dev); 266 eth_hw_addr_random(dev); 267 268 dev->tx_queue_len = 0; 269 dev->flags |= IFF_NOARP; 270 dev->flags &= ~IFF_MULTICAST; 271 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | 272 IFF_NO_QUEUE; 273 dev->features |= NETIF_F_HIGHDMA | 274 NETIF_F_SG | 275 NETIF_F_FRAGLIST | 276 NETIF_F_HW_CSUM | 277 NETIF_F_TSO; 278 dev->hw_features |= NETIF_F_HW_TC; 279 dev->max_mtu = ETH_MAX_MTU; 280 } 281 282 struct netdevsim * 283 nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port) 284 { 285 struct net_device *dev; 286 struct netdevsim *ns; 287 int err; 288 289 dev = alloc_netdev(sizeof(*ns), "eth%d", NET_NAME_UNKNOWN, nsim_setup); 290 if (!dev) 291 return ERR_PTR(-ENOMEM); 292 293 ns = netdev_priv(dev); 294 ns->netdev = dev; 295 ns->nsim_dev = nsim_dev; 296 ns->nsim_dev_port = nsim_dev_port; 297 ns->nsim_bus_dev = nsim_dev->nsim_bus_dev; 298 SET_NETDEV_DEV(dev, &ns->nsim_bus_dev->dev); 299 dev->netdev_ops = &nsim_netdev_ops; 300 301 rtnl_lock(); 302 err = nsim_bpf_init(ns); 303 if (err) 304 goto err_free_netdev; 305 306 nsim_ipsec_init(ns); 307 308 err = register_netdevice(dev); 309 if (err) 310 goto err_ipsec_teardown; 311 rtnl_unlock(); 312 313 return ns; 314 315 err_ipsec_teardown: 316 nsim_ipsec_teardown(ns); 317 nsim_bpf_uninit(ns); 318 rtnl_unlock(); 319 err_free_netdev: 320 free_netdev(dev); 321 return ERR_PTR(err); 322 } 323 324 void nsim_destroy(struct netdevsim *ns) 325 { 326 struct net_device *dev = ns->netdev; 327 328 rtnl_lock(); 329 unregister_netdevice(dev); 330 nsim_ipsec_teardown(ns); 331 nsim_bpf_uninit(ns); 332 rtnl_unlock(); 333 free_netdev(dev); 334 } 335 336 static int nsim_validate(struct nlattr *tb[], struct nlattr *data[], 337 struct netlink_ext_ack *extack) 338 { 339 NL_SET_ERR_MSG_MOD(extack, "Please use: echo \"[ID] [PORT_COUNT]\" > /sys/bus/netdevsim/new_device"); 340 return -EOPNOTSUPP; 341 } 342 343 static struct rtnl_link_ops nsim_link_ops __read_mostly = { 344 .kind = DRV_NAME, 345 .validate = nsim_validate, 346 }; 347 348 static int __init nsim_module_init(void) 349 { 350 int err; 351 352 err = nsim_dev_init(); 353 if (err) 354 return err; 355 356 err = nsim_bus_init(); 357 if (err) 358 goto err_dev_exit; 359 360 err = nsim_fib_init(); 361 if (err) 362 goto err_bus_exit; 363 364 err = rtnl_link_register(&nsim_link_ops); 365 if (err) 366 goto err_fib_exit; 367 368 return 0; 369 370 err_fib_exit: 371 nsim_fib_exit(); 372 err_bus_exit: 373 nsim_bus_exit(); 374 err_dev_exit: 375 nsim_dev_exit(); 376 return err; 377 } 378 379 static void __exit nsim_module_exit(void) 380 { 381 rtnl_link_unregister(&nsim_link_ops); 382 nsim_fib_exit(); 383 nsim_bus_exit(); 384 nsim_dev_exit(); 385 } 386 387 module_init(nsim_module_init); 388 module_exit(nsim_module_exit); 389 MODULE_LICENSE("GPL"); 390 MODULE_ALIAS_RTNL_LINK(DRV_NAME); 391