1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2 /* Copyright (C) 2017-2018 Netronome Systems, Inc. */ 3 4 #include <linux/etherdevice.h> 5 #include <linux/io-64-nonatomic-hi-lo.h> 6 #include <linux/lockdep.h> 7 #include <net/dst_metadata.h> 8 9 #include "nfpcore/nfp_cpp.h" 10 #include "nfpcore/nfp_nsp.h" 11 #include "nfp_app.h" 12 #include "nfp_main.h" 13 #include "nfp_net.h" 14 #include "nfp_net_ctrl.h" 15 #include "nfp_net_repr.h" 16 #include "nfp_net_sriov.h" 17 #include "nfp_port.h" 18 19 struct net_device * 20 nfp_repr_get_locked(struct nfp_app *app, struct nfp_reprs *set, unsigned int id) 21 { 22 return rcu_dereference_protected(set->reprs[id], 23 lockdep_is_held(&app->pf->lock)); 24 } 25 26 static void 27 nfp_repr_inc_tx_stats(struct net_device *netdev, unsigned int len, 28 int tx_status) 29 { 30 struct nfp_repr *repr = netdev_priv(netdev); 31 struct nfp_repr_pcpu_stats *stats; 32 33 if (unlikely(tx_status != NET_XMIT_SUCCESS && 34 tx_status != NET_XMIT_CN)) { 35 this_cpu_inc(repr->stats->tx_drops); 36 return; 37 } 38 39 stats = this_cpu_ptr(repr->stats); 40 u64_stats_update_begin(&stats->syncp); 41 stats->tx_packets++; 42 stats->tx_bytes += len; 43 u64_stats_update_end(&stats->syncp); 44 } 45 46 void nfp_repr_inc_rx_stats(struct net_device *netdev, unsigned int len) 47 { 48 struct nfp_repr *repr = netdev_priv(netdev); 49 struct nfp_repr_pcpu_stats *stats; 50 51 stats = this_cpu_ptr(repr->stats); 52 u64_stats_update_begin(&stats->syncp); 53 stats->rx_packets++; 54 stats->rx_bytes += len; 55 u64_stats_update_end(&stats->syncp); 56 } 57 58 static void 59 nfp_repr_phy_port_get_stats64(struct nfp_port *port, 60 struct rtnl_link_stats64 *stats) 61 { 62 u8 __iomem *mem = port->eth_stats; 63 64 stats->tx_packets = readq(mem + NFP_MAC_STATS_TX_FRAMES_TRANSMITTED_OK); 65 stats->tx_bytes = readq(mem + NFP_MAC_STATS_TX_OUT_OCTETS); 66 stats->tx_dropped = readq(mem + NFP_MAC_STATS_TX_OUT_ERRORS); 67 68 stats->rx_packets = readq(mem + NFP_MAC_STATS_RX_FRAMES_RECEIVED_OK); 69 stats->rx_bytes = readq(mem + NFP_MAC_STATS_RX_IN_OCTETS); 70 stats->rx_dropped = readq(mem + NFP_MAC_STATS_RX_IN_ERRORS); 71 } 72 73 static void 74 nfp_repr_vnic_get_stats64(struct nfp_port *port, 75 struct rtnl_link_stats64 *stats) 76 { 77 /* TX and RX stats are flipped as we are returning the stats as seen 78 * at the switch port corresponding to the VF. 79 */ 80 stats->tx_packets = readq(port->vnic + NFP_NET_CFG_STATS_RX_FRAMES); 81 stats->tx_bytes = readq(port->vnic + NFP_NET_CFG_STATS_RX_OCTETS); 82 stats->tx_dropped = readq(port->vnic + NFP_NET_CFG_STATS_RX_DISCARDS); 83 84 stats->rx_packets = readq(port->vnic + NFP_NET_CFG_STATS_TX_FRAMES); 85 stats->rx_bytes = readq(port->vnic + NFP_NET_CFG_STATS_TX_OCTETS); 86 stats->rx_dropped = readq(port->vnic + NFP_NET_CFG_STATS_TX_DISCARDS); 87 } 88 89 static void 90 nfp_repr_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats) 91 { 92 struct nfp_repr *repr = netdev_priv(netdev); 93 94 if (WARN_ON(!repr->port)) 95 return; 96 97 switch (repr->port->type) { 98 case NFP_PORT_PHYS_PORT: 99 if (!__nfp_port_get_eth_port(repr->port)) 100 break; 101 nfp_repr_phy_port_get_stats64(repr->port, stats); 102 break; 103 case NFP_PORT_PF_PORT: 104 case NFP_PORT_VF_PORT: 105 nfp_repr_vnic_get_stats64(repr->port, stats); 106 default: 107 break; 108 } 109 } 110 111 static bool 112 nfp_repr_has_offload_stats(const struct net_device *dev, int attr_id) 113 { 114 switch (attr_id) { 115 case IFLA_OFFLOAD_XSTATS_CPU_HIT: 116 return true; 117 } 118 119 return false; 120 } 121 122 static int 123 nfp_repr_get_host_stats64(const struct net_device *netdev, 124 struct rtnl_link_stats64 *stats) 125 { 126 struct nfp_repr *repr = netdev_priv(netdev); 127 int i; 128 129 for_each_possible_cpu(i) { 130 u64 tbytes, tpkts, tdrops, rbytes, rpkts; 131 struct nfp_repr_pcpu_stats *repr_stats; 132 unsigned int start; 133 134 repr_stats = per_cpu_ptr(repr->stats, i); 135 do { 136 start = u64_stats_fetch_begin_irq(&repr_stats->syncp); 137 tbytes = repr_stats->tx_bytes; 138 tpkts = repr_stats->tx_packets; 139 tdrops = repr_stats->tx_drops; 140 rbytes = repr_stats->rx_bytes; 141 rpkts = repr_stats->rx_packets; 142 } while (u64_stats_fetch_retry_irq(&repr_stats->syncp, start)); 143 144 stats->tx_bytes += tbytes; 145 stats->tx_packets += tpkts; 146 stats->tx_dropped += tdrops; 147 stats->rx_bytes += rbytes; 148 stats->rx_packets += rpkts; 149 } 150 151 return 0; 152 } 153 154 static int 155 nfp_repr_get_offload_stats(int attr_id, const struct net_device *dev, 156 void *stats) 157 { 158 switch (attr_id) { 159 case IFLA_OFFLOAD_XSTATS_CPU_HIT: 160 return nfp_repr_get_host_stats64(dev, stats); 161 } 162 163 return -EINVAL; 164 } 165 166 static int nfp_repr_change_mtu(struct net_device *netdev, int new_mtu) 167 { 168 struct nfp_repr *repr = netdev_priv(netdev); 169 int err; 170 171 err = nfp_app_check_mtu(repr->app, netdev, new_mtu); 172 if (err) 173 return err; 174 175 err = nfp_app_repr_change_mtu(repr->app, netdev, new_mtu); 176 if (err) 177 return err; 178 179 netdev->mtu = new_mtu; 180 181 return 0; 182 } 183 184 static netdev_tx_t nfp_repr_xmit(struct sk_buff *skb, struct net_device *netdev) 185 { 186 struct nfp_repr *repr = netdev_priv(netdev); 187 unsigned int len = skb->len; 188 int ret; 189 190 skb_dst_drop(skb); 191 dst_hold((struct dst_entry *)repr->dst); 192 skb_dst_set(skb, (struct dst_entry *)repr->dst); 193 skb->dev = repr->dst->u.port_info.lower_dev; 194 195 ret = dev_queue_xmit(skb); 196 nfp_repr_inc_tx_stats(netdev, len, ret); 197 198 return NETDEV_TX_OK; 199 } 200 201 static int nfp_repr_stop(struct net_device *netdev) 202 { 203 struct nfp_repr *repr = netdev_priv(netdev); 204 int err; 205 206 err = nfp_app_repr_stop(repr->app, repr); 207 if (err) 208 return err; 209 210 nfp_port_configure(netdev, false); 211 return 0; 212 } 213 214 static int nfp_repr_open(struct net_device *netdev) 215 { 216 struct nfp_repr *repr = netdev_priv(netdev); 217 int err; 218 219 err = nfp_port_configure(netdev, true); 220 if (err) 221 return err; 222 223 err = nfp_app_repr_open(repr->app, repr); 224 if (err) 225 goto err_port_disable; 226 227 return 0; 228 229 err_port_disable: 230 nfp_port_configure(netdev, false); 231 return err; 232 } 233 234 static netdev_features_t 235 nfp_repr_fix_features(struct net_device *netdev, netdev_features_t features) 236 { 237 struct nfp_repr *repr = netdev_priv(netdev); 238 netdev_features_t old_features = features; 239 netdev_features_t lower_features; 240 struct net_device *lower_dev; 241 242 lower_dev = repr->dst->u.port_info.lower_dev; 243 244 lower_features = lower_dev->features; 245 if (lower_features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) 246 lower_features |= NETIF_F_HW_CSUM; 247 248 features = netdev_intersect_features(features, lower_features); 249 features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_HW_TC); 250 features |= NETIF_F_LLTX; 251 252 return features; 253 } 254 255 const struct net_device_ops nfp_repr_netdev_ops = { 256 .ndo_init = nfp_app_ndo_init, 257 .ndo_uninit = nfp_app_ndo_uninit, 258 .ndo_open = nfp_repr_open, 259 .ndo_stop = nfp_repr_stop, 260 .ndo_start_xmit = nfp_repr_xmit, 261 .ndo_change_mtu = nfp_repr_change_mtu, 262 .ndo_get_stats64 = nfp_repr_get_stats64, 263 .ndo_has_offload_stats = nfp_repr_has_offload_stats, 264 .ndo_get_offload_stats = nfp_repr_get_offload_stats, 265 .ndo_get_phys_port_name = nfp_port_get_phys_port_name, 266 .ndo_setup_tc = nfp_port_setup_tc, 267 .ndo_set_vf_mac = nfp_app_set_vf_mac, 268 .ndo_set_vf_vlan = nfp_app_set_vf_vlan, 269 .ndo_set_vf_spoofchk = nfp_app_set_vf_spoofchk, 270 .ndo_set_vf_trust = nfp_app_set_vf_trust, 271 .ndo_get_vf_config = nfp_app_get_vf_config, 272 .ndo_set_vf_link_state = nfp_app_set_vf_link_state, 273 .ndo_fix_features = nfp_repr_fix_features, 274 .ndo_set_features = nfp_port_set_features, 275 .ndo_set_mac_address = eth_mac_addr, 276 .ndo_get_port_parent_id = nfp_port_get_port_parent_id, 277 .ndo_get_devlink_port = nfp_devlink_get_devlink_port, 278 }; 279 280 void 281 nfp_repr_transfer_features(struct net_device *netdev, struct net_device *lower) 282 { 283 struct nfp_repr *repr = netdev_priv(netdev); 284 285 if (repr->dst->u.port_info.lower_dev != lower) 286 return; 287 288 netdev->gso_max_size = lower->gso_max_size; 289 netdev->gso_max_segs = lower->gso_max_segs; 290 291 netdev_update_features(netdev); 292 } 293 294 static void nfp_repr_clean(struct nfp_repr *repr) 295 { 296 unregister_netdev(repr->netdev); 297 nfp_app_repr_clean(repr->app, repr->netdev); 298 dst_release((struct dst_entry *)repr->dst); 299 nfp_port_free(repr->port); 300 } 301 302 static struct lock_class_key nfp_repr_netdev_xmit_lock_key; 303 304 static void nfp_repr_set_lockdep_class_one(struct net_device *dev, 305 struct netdev_queue *txq, 306 void *_unused) 307 { 308 lockdep_set_class(&txq->_xmit_lock, &nfp_repr_netdev_xmit_lock_key); 309 } 310 311 static void nfp_repr_set_lockdep_class(struct net_device *dev) 312 { 313 netdev_for_each_tx_queue(dev, nfp_repr_set_lockdep_class_one, NULL); 314 } 315 316 int nfp_repr_init(struct nfp_app *app, struct net_device *netdev, 317 u32 cmsg_port_id, struct nfp_port *port, 318 struct net_device *pf_netdev) 319 { 320 struct nfp_repr *repr = netdev_priv(netdev); 321 struct nfp_net *nn = netdev_priv(pf_netdev); 322 u32 repr_cap = nn->tlv_caps.repr_cap; 323 int err; 324 325 nfp_repr_set_lockdep_class(netdev); 326 327 repr->port = port; 328 repr->dst = metadata_dst_alloc(0, METADATA_HW_PORT_MUX, GFP_KERNEL); 329 if (!repr->dst) 330 return -ENOMEM; 331 repr->dst->u.port_info.port_id = cmsg_port_id; 332 repr->dst->u.port_info.lower_dev = pf_netdev; 333 334 netdev->netdev_ops = &nfp_repr_netdev_ops; 335 netdev->ethtool_ops = &nfp_port_ethtool_ops; 336 337 netdev->max_mtu = pf_netdev->max_mtu; 338 339 /* Set features the lower device can support with representors */ 340 if (repr_cap & NFP_NET_CFG_CTRL_LIVE_ADDR) 341 netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE; 342 343 netdev->hw_features = NETIF_F_HIGHDMA; 344 if (repr_cap & NFP_NET_CFG_CTRL_RXCSUM_ANY) 345 netdev->hw_features |= NETIF_F_RXCSUM; 346 if (repr_cap & NFP_NET_CFG_CTRL_TXCSUM) 347 netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 348 if (repr_cap & NFP_NET_CFG_CTRL_GATHER) 349 netdev->hw_features |= NETIF_F_SG; 350 if ((repr_cap & NFP_NET_CFG_CTRL_LSO && nn->fw_ver.major > 2) || 351 repr_cap & NFP_NET_CFG_CTRL_LSO2) 352 netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; 353 if (repr_cap & NFP_NET_CFG_CTRL_RSS_ANY) 354 netdev->hw_features |= NETIF_F_RXHASH; 355 if (repr_cap & NFP_NET_CFG_CTRL_VXLAN) { 356 if (repr_cap & NFP_NET_CFG_CTRL_LSO) 357 netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL; 358 } 359 if (repr_cap & NFP_NET_CFG_CTRL_NVGRE) { 360 if (repr_cap & NFP_NET_CFG_CTRL_LSO) 361 netdev->hw_features |= NETIF_F_GSO_GRE; 362 } 363 if (repr_cap & (NFP_NET_CFG_CTRL_VXLAN | NFP_NET_CFG_CTRL_NVGRE)) 364 netdev->hw_enc_features = netdev->hw_features; 365 366 netdev->vlan_features = netdev->hw_features; 367 368 if (repr_cap & NFP_NET_CFG_CTRL_RXVLAN) 369 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX; 370 if (repr_cap & NFP_NET_CFG_CTRL_TXVLAN) { 371 if (repr_cap & NFP_NET_CFG_CTRL_LSO2) 372 netdev_warn(netdev, "Device advertises both TSO2 and TXVLAN. Refusing to enable TXVLAN.\n"); 373 else 374 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX; 375 } 376 if (repr_cap & NFP_NET_CFG_CTRL_CTAG_FILTER) 377 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER; 378 379 netdev->features = netdev->hw_features; 380 381 /* Advertise but disable TSO by default. */ 382 netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6); 383 netdev->gso_max_segs = NFP_NET_LSO_MAX_SEGS; 384 385 netdev->priv_flags |= IFF_NO_QUEUE | IFF_DISABLE_NETPOLL; 386 netdev->features |= NETIF_F_LLTX; 387 388 if (nfp_app_has_tc(app)) { 389 netdev->features |= NETIF_F_HW_TC; 390 netdev->hw_features |= NETIF_F_HW_TC; 391 } 392 393 err = nfp_app_repr_init(app, netdev); 394 if (err) 395 goto err_clean; 396 397 err = register_netdev(netdev); 398 if (err) 399 goto err_repr_clean; 400 401 return 0; 402 403 err_repr_clean: 404 nfp_app_repr_clean(app, netdev); 405 err_clean: 406 dst_release((struct dst_entry *)repr->dst); 407 return err; 408 } 409 410 static void __nfp_repr_free(struct nfp_repr *repr) 411 { 412 free_percpu(repr->stats); 413 free_netdev(repr->netdev); 414 } 415 416 void nfp_repr_free(struct net_device *netdev) 417 { 418 __nfp_repr_free(netdev_priv(netdev)); 419 } 420 421 struct net_device * 422 nfp_repr_alloc_mqs(struct nfp_app *app, unsigned int txqs, unsigned int rxqs) 423 { 424 struct net_device *netdev; 425 struct nfp_repr *repr; 426 427 netdev = alloc_etherdev_mqs(sizeof(*repr), txqs, rxqs); 428 if (!netdev) 429 return NULL; 430 431 netif_carrier_off(netdev); 432 433 repr = netdev_priv(netdev); 434 repr->netdev = netdev; 435 repr->app = app; 436 437 repr->stats = netdev_alloc_pcpu_stats(struct nfp_repr_pcpu_stats); 438 if (!repr->stats) 439 goto err_free_netdev; 440 441 return netdev; 442 443 err_free_netdev: 444 free_netdev(netdev); 445 return NULL; 446 } 447 448 void nfp_repr_clean_and_free(struct nfp_repr *repr) 449 { 450 nfp_info(repr->app->cpp, "Destroying Representor(%s)\n", 451 repr->netdev->name); 452 nfp_repr_clean(repr); 453 __nfp_repr_free(repr); 454 } 455 456 void nfp_reprs_clean_and_free(struct nfp_app *app, struct nfp_reprs *reprs) 457 { 458 struct net_device *netdev; 459 unsigned int i; 460 461 for (i = 0; i < reprs->num_reprs; i++) { 462 netdev = nfp_repr_get_locked(app, reprs, i); 463 if (netdev) 464 nfp_repr_clean_and_free(netdev_priv(netdev)); 465 } 466 467 kfree(reprs); 468 } 469 470 void 471 nfp_reprs_clean_and_free_by_type(struct nfp_app *app, enum nfp_repr_type type) 472 { 473 struct net_device *netdev; 474 struct nfp_reprs *reprs; 475 int i; 476 477 reprs = rcu_dereference_protected(app->reprs[type], 478 lockdep_is_held(&app->pf->lock)); 479 if (!reprs) 480 return; 481 482 /* Preclean must happen before we remove the reprs reference from the 483 * app below. 484 */ 485 for (i = 0; i < reprs->num_reprs; i++) { 486 netdev = nfp_repr_get_locked(app, reprs, i); 487 if (netdev) 488 nfp_app_repr_preclean(app, netdev); 489 } 490 491 reprs = nfp_app_reprs_set(app, type, NULL); 492 493 synchronize_rcu(); 494 nfp_reprs_clean_and_free(app, reprs); 495 } 496 497 struct nfp_reprs *nfp_reprs_alloc(unsigned int num_reprs) 498 { 499 struct nfp_reprs *reprs; 500 501 reprs = kzalloc(sizeof(*reprs) + 502 num_reprs * sizeof(struct net_device *), GFP_KERNEL); 503 if (!reprs) 504 return NULL; 505 reprs->num_reprs = num_reprs; 506 507 return reprs; 508 } 509 510 int nfp_reprs_resync_phys_ports(struct nfp_app *app) 511 { 512 struct net_device *netdev; 513 struct nfp_reprs *reprs; 514 struct nfp_repr *repr; 515 int i; 516 517 reprs = nfp_reprs_get_locked(app, NFP_REPR_TYPE_PHYS_PORT); 518 if (!reprs) 519 return 0; 520 521 for (i = 0; i < reprs->num_reprs; i++) { 522 netdev = nfp_repr_get_locked(app, reprs, i); 523 if (!netdev) 524 continue; 525 526 repr = netdev_priv(netdev); 527 if (repr->port->type != NFP_PORT_INVALID) 528 continue; 529 530 nfp_app_repr_preclean(app, netdev); 531 rtnl_lock(); 532 rcu_assign_pointer(reprs->reprs[i], NULL); 533 rtnl_unlock(); 534 synchronize_rcu(); 535 nfp_repr_clean(repr); 536 } 537 538 return 0; 539 } 540