1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (C) 2019-2021, Intel Corporation. */ 3 4 #include "ice.h" 5 #include "ice_eswitch.h" 6 #include "ice_devlink.h" 7 #include "ice_sriov.h" 8 #include "ice_tc_lib.h" 9 10 /** 11 * ice_repr_get_sw_port_id - get port ID associated with representor 12 * @repr: pointer to port representor 13 */ 14 static int ice_repr_get_sw_port_id(struct ice_repr *repr) 15 { 16 return repr->vf->pf->hw.port_info->lport; 17 } 18 19 /** 20 * ice_repr_get_phys_port_name - get phys port name 21 * @netdev: pointer to port representor netdev 22 * @buf: write here port name 23 * @len: max length of buf 24 */ 25 static int 26 ice_repr_get_phys_port_name(struct net_device *netdev, char *buf, size_t len) 27 { 28 struct ice_netdev_priv *np = netdev_priv(netdev); 29 struct ice_repr *repr = np->repr; 30 int res; 31 32 /* Devlink port is registered and devlink core is taking care of name formatting. */ 33 if (repr->vf->devlink_port.devlink) 34 return -EOPNOTSUPP; 35 36 res = snprintf(buf, len, "pf%dvfr%d", ice_repr_get_sw_port_id(repr), 37 repr->vf->vf_id); 38 if (res <= 0) 39 return -EOPNOTSUPP; 40 return 0; 41 } 42 43 /** 44 * ice_repr_get_stats64 - get VF stats for VFPR use 45 * @netdev: pointer to port representor netdev 46 * @stats: pointer to struct where stats can be stored 47 */ 48 static void 49 ice_repr_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats) 50 { 51 struct ice_netdev_priv *np = netdev_priv(netdev); 52 struct ice_eth_stats *eth_stats; 53 struct ice_vsi *vsi; 54 55 if (ice_is_vf_disabled(np->repr->vf)) 56 return; 57 vsi = np->repr->src_vsi; 58 59 ice_update_vsi_stats(vsi); 60 eth_stats = &vsi->eth_stats; 61 62 stats->tx_packets = eth_stats->tx_unicast + eth_stats->tx_broadcast + 63 eth_stats->tx_multicast; 64 stats->rx_packets = eth_stats->rx_unicast + eth_stats->rx_broadcast + 65 eth_stats->rx_multicast; 66 stats->tx_bytes = eth_stats->tx_bytes; 67 stats->rx_bytes = eth_stats->rx_bytes; 68 stats->multicast = eth_stats->rx_multicast; 69 stats->tx_errors = eth_stats->tx_errors; 70 stats->tx_dropped = eth_stats->tx_discards; 71 stats->rx_dropped = eth_stats->rx_discards; 72 } 73 74 /** 75 * ice_netdev_to_repr - Get port representor for given netdevice 76 * @netdev: pointer to port representor netdev 77 */ 78 struct ice_repr *ice_netdev_to_repr(struct net_device *netdev) 79 { 80 struct ice_netdev_priv *np = netdev_priv(netdev); 81 82 return np->repr; 83 } 84 85 /** 86 * ice_repr_open - Enable port representor's network interface 87 * @netdev: network interface device structure 88 * 89 * The open entry point is called when a port representor's network 90 * interface is made active by the system (IFF_UP). Corresponding 91 * VF is notified about link status change. 92 * 93 * Returns 0 on success 94 */ 95 static int ice_repr_open(struct net_device *netdev) 96 { 97 struct ice_repr *repr = ice_netdev_to_repr(netdev); 98 struct ice_vf *vf; 99 100 vf = repr->vf; 101 vf->link_forced = true; 102 vf->link_up = true; 103 ice_vc_notify_vf_link_state(vf); 104 105 netif_carrier_on(netdev); 106 netif_tx_start_all_queues(netdev); 107 108 return 0; 109 } 110 111 /** 112 * ice_repr_stop - Disable port representor's network interface 113 * @netdev: network interface device structure 114 * 115 * The stop entry point is called when a port representor's network 116 * interface is de-activated by the system. Corresponding 117 * VF is notified about link status change. 118 * 119 * Returns 0 on success 120 */ 121 static int ice_repr_stop(struct net_device *netdev) 122 { 123 struct ice_repr *repr = ice_netdev_to_repr(netdev); 124 struct ice_vf *vf; 125 126 vf = repr->vf; 127 vf->link_forced = true; 128 vf->link_up = false; 129 ice_vc_notify_vf_link_state(vf); 130 131 netif_carrier_off(netdev); 132 netif_tx_stop_all_queues(netdev); 133 134 return 0; 135 } 136 137 static struct devlink_port * 138 ice_repr_get_devlink_port(struct net_device *netdev) 139 { 140 struct ice_repr *repr = ice_netdev_to_repr(netdev); 141 142 return &repr->vf->devlink_port; 143 } 144 145 /** 146 * ice_repr_sp_stats64 - get slow path stats for port representor 147 * @dev: network interface device structure 148 * @stats: netlink stats structure 149 * 150 * RX/TX stats are being swapped here to be consistent with VF stats. In slow 151 * path, port representor receives data when the corresponding VF is sending it 152 * (and vice versa), TX and RX bytes/packets are effectively swapped on port 153 * representor. 154 */ 155 static int 156 ice_repr_sp_stats64(const struct net_device *dev, 157 struct rtnl_link_stats64 *stats) 158 { 159 struct ice_netdev_priv *np = netdev_priv(dev); 160 int vf_id = np->repr->vf->vf_id; 161 struct ice_tx_ring *tx_ring; 162 struct ice_rx_ring *rx_ring; 163 u64 pkts, bytes; 164 165 tx_ring = np->vsi->tx_rings[vf_id]; 166 ice_fetch_u64_stats_per_ring(&tx_ring->syncp, tx_ring->stats, 167 &pkts, &bytes); 168 stats->rx_packets = pkts; 169 stats->rx_bytes = bytes; 170 171 rx_ring = np->vsi->rx_rings[vf_id]; 172 ice_fetch_u64_stats_per_ring(&rx_ring->syncp, rx_ring->stats, 173 &pkts, &bytes); 174 stats->tx_packets = pkts; 175 stats->tx_bytes = bytes; 176 stats->tx_dropped = rx_ring->rx_stats.alloc_page_failed + 177 rx_ring->rx_stats.alloc_buf_failed; 178 179 return 0; 180 } 181 182 static bool 183 ice_repr_ndo_has_offload_stats(const struct net_device *dev, int attr_id) 184 { 185 return attr_id == IFLA_OFFLOAD_XSTATS_CPU_HIT; 186 } 187 188 static int 189 ice_repr_ndo_get_offload_stats(int attr_id, const struct net_device *dev, 190 void *sp) 191 { 192 if (attr_id == IFLA_OFFLOAD_XSTATS_CPU_HIT) 193 return ice_repr_sp_stats64(dev, (struct rtnl_link_stats64 *)sp); 194 195 return -EINVAL; 196 } 197 198 static int 199 ice_repr_setup_tc_cls_flower(struct ice_repr *repr, 200 struct flow_cls_offload *flower) 201 { 202 switch (flower->command) { 203 case FLOW_CLS_REPLACE: 204 return ice_add_cls_flower(repr->netdev, repr->src_vsi, flower); 205 case FLOW_CLS_DESTROY: 206 return ice_del_cls_flower(repr->src_vsi, flower); 207 default: 208 return -EINVAL; 209 } 210 } 211 212 static int 213 ice_repr_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 214 void *cb_priv) 215 { 216 struct flow_cls_offload *flower = (struct flow_cls_offload *)type_data; 217 struct ice_netdev_priv *np = (struct ice_netdev_priv *)cb_priv; 218 219 switch (type) { 220 case TC_SETUP_CLSFLOWER: 221 return ice_repr_setup_tc_cls_flower(np->repr, flower); 222 default: 223 return -EOPNOTSUPP; 224 } 225 } 226 227 static LIST_HEAD(ice_repr_block_cb_list); 228 229 static int 230 ice_repr_setup_tc(struct net_device *netdev, enum tc_setup_type type, 231 void *type_data) 232 { 233 struct ice_netdev_priv *np = netdev_priv(netdev); 234 235 switch (type) { 236 case TC_SETUP_BLOCK: 237 return flow_block_cb_setup_simple((struct flow_block_offload *) 238 type_data, 239 &ice_repr_block_cb_list, 240 ice_repr_setup_tc_block_cb, 241 np, np, true); 242 default: 243 return -EOPNOTSUPP; 244 } 245 } 246 247 static const struct net_device_ops ice_repr_netdev_ops = { 248 .ndo_get_phys_port_name = ice_repr_get_phys_port_name, 249 .ndo_get_stats64 = ice_repr_get_stats64, 250 .ndo_open = ice_repr_open, 251 .ndo_stop = ice_repr_stop, 252 .ndo_start_xmit = ice_eswitch_port_start_xmit, 253 .ndo_get_devlink_port = ice_repr_get_devlink_port, 254 .ndo_setup_tc = ice_repr_setup_tc, 255 .ndo_has_offload_stats = ice_repr_ndo_has_offload_stats, 256 .ndo_get_offload_stats = ice_repr_ndo_get_offload_stats, 257 }; 258 259 /** 260 * ice_is_port_repr_netdev - Check if a given netdevice is a port representor netdev 261 * @netdev: pointer to netdev 262 */ 263 bool ice_is_port_repr_netdev(struct net_device *netdev) 264 { 265 return netdev && (netdev->netdev_ops == &ice_repr_netdev_ops); 266 } 267 268 /** 269 * ice_repr_reg_netdev - register port representor netdev 270 * @netdev: pointer to port representor netdev 271 */ 272 static int 273 ice_repr_reg_netdev(struct net_device *netdev) 274 { 275 eth_hw_addr_random(netdev); 276 netdev->netdev_ops = &ice_repr_netdev_ops; 277 ice_set_ethtool_repr_ops(netdev); 278 279 netdev->hw_features |= NETIF_F_HW_TC; 280 281 netif_carrier_off(netdev); 282 netif_tx_stop_all_queues(netdev); 283 284 return register_netdev(netdev); 285 } 286 287 /** 288 * ice_repr_add - add representor for VF 289 * @vf: pointer to VF structure 290 */ 291 static int ice_repr_add(struct ice_vf *vf) 292 { 293 struct ice_q_vector *q_vector; 294 struct ice_netdev_priv *np; 295 struct ice_repr *repr; 296 int err; 297 298 repr = kzalloc(sizeof(*repr), GFP_KERNEL); 299 if (!repr) 300 return -ENOMEM; 301 302 #ifdef CONFIG_ICE_SWITCHDEV 303 repr->mac_rule = kzalloc(sizeof(*repr->mac_rule), GFP_KERNEL); 304 if (!repr->mac_rule) { 305 err = -ENOMEM; 306 goto err_alloc_rule; 307 } 308 #endif 309 310 repr->netdev = alloc_etherdev(sizeof(struct ice_netdev_priv)); 311 if (!repr->netdev) { 312 err = -ENOMEM; 313 goto err_alloc; 314 } 315 316 repr->src_vsi = ice_get_vf_vsi(vf); 317 repr->vf = vf; 318 vf->repr = repr; 319 np = netdev_priv(repr->netdev); 320 np->repr = repr; 321 322 q_vector = kzalloc(sizeof(*q_vector), GFP_KERNEL); 323 if (!q_vector) { 324 err = -ENOMEM; 325 goto err_alloc_q_vector; 326 } 327 repr->q_vector = q_vector; 328 329 err = ice_devlink_create_vf_port(vf); 330 if (err) 331 goto err_devlink; 332 333 repr->netdev->min_mtu = ETH_MIN_MTU; 334 repr->netdev->max_mtu = ICE_MAX_MTU; 335 336 err = ice_repr_reg_netdev(repr->netdev); 337 if (err) 338 goto err_netdev; 339 340 devlink_port_type_eth_set(&vf->devlink_port, repr->netdev); 341 342 ice_virtchnl_set_repr_ops(vf); 343 344 return 0; 345 346 err_netdev: 347 ice_devlink_destroy_vf_port(vf); 348 err_devlink: 349 kfree(repr->q_vector); 350 vf->repr->q_vector = NULL; 351 err_alloc_q_vector: 352 free_netdev(repr->netdev); 353 repr->netdev = NULL; 354 err_alloc: 355 #ifdef CONFIG_ICE_SWITCHDEV 356 kfree(repr->mac_rule); 357 repr->mac_rule = NULL; 358 err_alloc_rule: 359 #endif 360 kfree(repr); 361 vf->repr = NULL; 362 return err; 363 } 364 365 /** 366 * ice_repr_rem - remove representor from VF 367 * @vf: pointer to VF structure 368 */ 369 static void ice_repr_rem(struct ice_vf *vf) 370 { 371 if (!vf->repr) 372 return; 373 374 ice_devlink_destroy_vf_port(vf); 375 kfree(vf->repr->q_vector); 376 vf->repr->q_vector = NULL; 377 unregister_netdev(vf->repr->netdev); 378 free_netdev(vf->repr->netdev); 379 vf->repr->netdev = NULL; 380 #ifdef CONFIG_ICE_SWITCHDEV 381 kfree(vf->repr->mac_rule); 382 vf->repr->mac_rule = NULL; 383 #endif 384 kfree(vf->repr); 385 vf->repr = NULL; 386 387 ice_virtchnl_set_dflt_ops(vf); 388 } 389 390 /** 391 * ice_repr_rem_from_all_vfs - remove port representor for all VFs 392 * @pf: pointer to PF structure 393 */ 394 void ice_repr_rem_from_all_vfs(struct ice_pf *pf) 395 { 396 struct ice_vf *vf; 397 unsigned int bkt; 398 399 lockdep_assert_held(&pf->vfs.table_lock); 400 401 ice_for_each_vf(pf, bkt, vf) 402 ice_repr_rem(vf); 403 } 404 405 /** 406 * ice_repr_add_for_all_vfs - add port representor for all VFs 407 * @pf: pointer to PF structure 408 */ 409 int ice_repr_add_for_all_vfs(struct ice_pf *pf) 410 { 411 struct ice_vf *vf; 412 unsigned int bkt; 413 int err; 414 415 lockdep_assert_held(&pf->vfs.table_lock); 416 417 ice_for_each_vf(pf, bkt, vf) { 418 err = ice_repr_add(vf); 419 if (err) 420 goto err; 421 } 422 423 return 0; 424 425 err: 426 ice_repr_rem_from_all_vfs(pf); 427 428 return err; 429 } 430 431 /** 432 * ice_repr_start_tx_queues - start Tx queues of port representor 433 * @repr: pointer to repr structure 434 */ 435 void ice_repr_start_tx_queues(struct ice_repr *repr) 436 { 437 netif_carrier_on(repr->netdev); 438 netif_tx_start_all_queues(repr->netdev); 439 } 440 441 /** 442 * ice_repr_stop_tx_queues - stop Tx queues of port representor 443 * @repr: pointer to repr structure 444 */ 445 void ice_repr_stop_tx_queues(struct ice_repr *repr) 446 { 447 netif_carrier_off(repr->netdev); 448 netif_tx_stop_all_queues(repr->netdev); 449 } 450 451 /** 452 * ice_repr_set_traffic_vsi - set traffic VSI for port representor 453 * @repr: repr on with VSI will be set 454 * @vsi: pointer to VSI that will be used by port representor to pass traffic 455 */ 456 void ice_repr_set_traffic_vsi(struct ice_repr *repr, struct ice_vsi *vsi) 457 { 458 struct ice_netdev_priv *np = netdev_priv(repr->netdev); 459 460 np->vsi = vsi; 461 } 462