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 break; 107 default: 108 break; 109 } 110 } 111 112 static bool 113 nfp_repr_has_offload_stats(const struct net_device *dev, int attr_id) 114 { 115 switch (attr_id) { 116 case IFLA_OFFLOAD_XSTATS_CPU_HIT: 117 return true; 118 } 119 120 return false; 121 } 122 123 static int 124 nfp_repr_get_host_stats64(const struct net_device *netdev, 125 struct rtnl_link_stats64 *stats) 126 { 127 struct nfp_repr *repr = netdev_priv(netdev); 128 int i; 129 130 for_each_possible_cpu(i) { 131 u64 tbytes, tpkts, tdrops, rbytes, rpkts; 132 struct nfp_repr_pcpu_stats *repr_stats; 133 unsigned int start; 134 135 repr_stats = per_cpu_ptr(repr->stats, i); 136 do { 137 start = u64_stats_fetch_begin_irq(&repr_stats->syncp); 138 tbytes = repr_stats->tx_bytes; 139 tpkts = repr_stats->tx_packets; 140 tdrops = repr_stats->tx_drops; 141 rbytes = repr_stats->rx_bytes; 142 rpkts = repr_stats->rx_packets; 143 } while (u64_stats_fetch_retry_irq(&repr_stats->syncp, start)); 144 145 stats->tx_bytes += tbytes; 146 stats->tx_packets += tpkts; 147 stats->tx_dropped += tdrops; 148 stats->rx_bytes += rbytes; 149 stats->rx_packets += rpkts; 150 } 151 152 return 0; 153 } 154 155 static int 156 nfp_repr_get_offload_stats(int attr_id, const struct net_device *dev, 157 void *stats) 158 { 159 switch (attr_id) { 160 case IFLA_OFFLOAD_XSTATS_CPU_HIT: 161 return nfp_repr_get_host_stats64(dev, stats); 162 } 163 164 return -EINVAL; 165 } 166 167 static int nfp_repr_change_mtu(struct net_device *netdev, int new_mtu) 168 { 169 struct nfp_repr *repr = netdev_priv(netdev); 170 int err; 171 172 err = nfp_app_check_mtu(repr->app, netdev, new_mtu); 173 if (err) 174 return err; 175 176 err = nfp_app_repr_change_mtu(repr->app, netdev, new_mtu); 177 if (err) 178 return err; 179 180 netdev->mtu = new_mtu; 181 182 return 0; 183 } 184 185 static netdev_tx_t nfp_repr_xmit(struct sk_buff *skb, struct net_device *netdev) 186 { 187 struct nfp_repr *repr = netdev_priv(netdev); 188 unsigned int len = skb->len; 189 int ret; 190 191 skb_dst_drop(skb); 192 dst_hold((struct dst_entry *)repr->dst); 193 skb_dst_set(skb, (struct dst_entry *)repr->dst); 194 skb->dev = repr->dst->u.port_info.lower_dev; 195 196 ret = dev_queue_xmit(skb); 197 nfp_repr_inc_tx_stats(netdev, len, ret); 198 199 return NETDEV_TX_OK; 200 } 201 202 static int nfp_repr_stop(struct net_device *netdev) 203 { 204 struct nfp_repr *repr = netdev_priv(netdev); 205 int err; 206 207 err = nfp_app_repr_stop(repr->app, repr); 208 if (err) 209 return err; 210 211 nfp_port_configure(netdev, false); 212 return 0; 213 } 214 215 static int nfp_repr_open(struct net_device *netdev) 216 { 217 struct nfp_repr *repr = netdev_priv(netdev); 218 int err; 219 220 err = nfp_port_configure(netdev, true); 221 if (err) 222 return err; 223 224 err = nfp_app_repr_open(repr->app, repr); 225 if (err) 226 goto err_port_disable; 227 228 return 0; 229 230 err_port_disable: 231 nfp_port_configure(netdev, false); 232 return err; 233 } 234 235 static netdev_features_t 236 nfp_repr_fix_features(struct net_device *netdev, netdev_features_t features) 237 { 238 struct nfp_repr *repr = netdev_priv(netdev); 239 netdev_features_t old_features = features; 240 netdev_features_t lower_features; 241 struct net_device *lower_dev; 242 243 lower_dev = repr->dst->u.port_info.lower_dev; 244 245 lower_features = lower_dev->features; 246 if (lower_features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) 247 lower_features |= NETIF_F_HW_CSUM; 248 249 features = netdev_intersect_features(features, lower_features); 250 features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_HW_TC); 251 features |= NETIF_F_LLTX; 252 253 return features; 254 } 255 256 const struct net_device_ops nfp_repr_netdev_ops = { 257 .ndo_init = nfp_app_ndo_init, 258 .ndo_uninit = nfp_app_ndo_uninit, 259 .ndo_open = nfp_repr_open, 260 .ndo_stop = nfp_repr_stop, 261 .ndo_start_xmit = nfp_repr_xmit, 262 .ndo_change_mtu = nfp_repr_change_mtu, 263 .ndo_get_stats64 = nfp_repr_get_stats64, 264 .ndo_has_offload_stats = nfp_repr_has_offload_stats, 265 .ndo_get_offload_stats = nfp_repr_get_offload_stats, 266 .ndo_get_phys_port_name = nfp_port_get_phys_port_name, 267 .ndo_setup_tc = nfp_port_setup_tc, 268 .ndo_set_vf_mac = nfp_app_set_vf_mac, 269 .ndo_set_vf_vlan = nfp_app_set_vf_vlan, 270 .ndo_set_vf_spoofchk = nfp_app_set_vf_spoofchk, 271 .ndo_set_vf_trust = nfp_app_set_vf_trust, 272 .ndo_get_vf_config = nfp_app_get_vf_config, 273 .ndo_set_vf_link_state = nfp_app_set_vf_link_state, 274 .ndo_fix_features = nfp_repr_fix_features, 275 .ndo_set_features = nfp_port_set_features, 276 .ndo_set_mac_address = eth_mac_addr, 277 .ndo_get_port_parent_id = nfp_port_get_port_parent_id, 278 .ndo_get_devlink_port = nfp_devlink_get_devlink_port, 279 }; 280 281 void 282 nfp_repr_transfer_features(struct net_device *netdev, struct net_device *lower) 283 { 284 struct nfp_repr *repr = netdev_priv(netdev); 285 286 if (repr->dst->u.port_info.lower_dev != lower) 287 return; 288 289 netif_set_gso_max_size(netdev, lower->gso_max_size); 290 netdev->gso_max_segs = lower->gso_max_segs; 291 292 netdev_update_features(netdev); 293 } 294 295 static void nfp_repr_clean(struct nfp_repr *repr) 296 { 297 unregister_netdev(repr->netdev); 298 nfp_app_repr_clean(repr->app, repr->netdev); 299 dst_release((struct dst_entry *)repr->dst); 300 nfp_port_free(repr->port); 301 } 302 303 static struct lock_class_key nfp_repr_netdev_xmit_lock_key; 304 305 static void nfp_repr_set_lockdep_class_one(struct net_device *dev, 306 struct netdev_queue *txq, 307 void *_unused) 308 { 309 lockdep_set_class(&txq->_xmit_lock, &nfp_repr_netdev_xmit_lock_key); 310 } 311 312 static void nfp_repr_set_lockdep_class(struct net_device *dev) 313 { 314 netdev_for_each_tx_queue(dev, nfp_repr_set_lockdep_class_one, NULL); 315 } 316 317 int nfp_repr_init(struct nfp_app *app, struct net_device *netdev, 318 u32 cmsg_port_id, struct nfp_port *port, 319 struct net_device *pf_netdev) 320 { 321 struct nfp_repr *repr = netdev_priv(netdev); 322 struct nfp_net *nn = netdev_priv(pf_netdev); 323 u32 repr_cap = nn->tlv_caps.repr_cap; 324 int err; 325 326 nfp_repr_set_lockdep_class(netdev); 327 328 repr->port = port; 329 repr->dst = metadata_dst_alloc(0, METADATA_HW_PORT_MUX, GFP_KERNEL); 330 if (!repr->dst) 331 return -ENOMEM; 332 repr->dst->u.port_info.port_id = cmsg_port_id; 333 repr->dst->u.port_info.lower_dev = pf_netdev; 334 335 netdev->netdev_ops = &nfp_repr_netdev_ops; 336 netdev->ethtool_ops = &nfp_port_ethtool_ops; 337 338 netdev->max_mtu = pf_netdev->max_mtu; 339 340 /* Set features the lower device can support with representors */ 341 if (repr_cap & NFP_NET_CFG_CTRL_LIVE_ADDR) 342 netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE; 343 344 netdev->hw_features = NETIF_F_HIGHDMA; 345 if (repr_cap & NFP_NET_CFG_CTRL_RXCSUM_ANY) 346 netdev->hw_features |= NETIF_F_RXCSUM; 347 if (repr_cap & NFP_NET_CFG_CTRL_TXCSUM) 348 netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 349 if (repr_cap & NFP_NET_CFG_CTRL_GATHER) 350 netdev->hw_features |= NETIF_F_SG; 351 if ((repr_cap & NFP_NET_CFG_CTRL_LSO && nn->fw_ver.major > 2) || 352 repr_cap & NFP_NET_CFG_CTRL_LSO2) 353 netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; 354 if (repr_cap & NFP_NET_CFG_CTRL_RSS_ANY) 355 netdev->hw_features |= NETIF_F_RXHASH; 356 if (repr_cap & NFP_NET_CFG_CTRL_VXLAN) { 357 if (repr_cap & NFP_NET_CFG_CTRL_LSO) 358 netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL; 359 } 360 if (repr_cap & NFP_NET_CFG_CTRL_NVGRE) { 361 if (repr_cap & NFP_NET_CFG_CTRL_LSO) 362 netdev->hw_features |= NETIF_F_GSO_GRE; 363 } 364 if (repr_cap & (NFP_NET_CFG_CTRL_VXLAN | NFP_NET_CFG_CTRL_NVGRE)) 365 netdev->hw_enc_features = netdev->hw_features; 366 367 netdev->vlan_features = netdev->hw_features; 368 369 if (repr_cap & NFP_NET_CFG_CTRL_RXVLAN) 370 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX; 371 if (repr_cap & NFP_NET_CFG_CTRL_TXVLAN) { 372 if (repr_cap & NFP_NET_CFG_CTRL_LSO2) 373 netdev_warn(netdev, "Device advertises both TSO2 and TXVLAN. Refusing to enable TXVLAN.\n"); 374 else 375 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX; 376 } 377 if (repr_cap & NFP_NET_CFG_CTRL_CTAG_FILTER) 378 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER; 379 380 netdev->features = netdev->hw_features; 381 382 /* Advertise but disable TSO by default. */ 383 netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6); 384 netdev->gso_max_segs = NFP_NET_LSO_MAX_SEGS; 385 386 netdev->priv_flags |= IFF_NO_QUEUE | IFF_DISABLE_NETPOLL; 387 netdev->features |= NETIF_F_LLTX; 388 389 if (nfp_app_has_tc(app)) { 390 netdev->features |= NETIF_F_HW_TC; 391 netdev->hw_features |= NETIF_F_HW_TC; 392 } 393 394 err = nfp_app_repr_init(app, netdev); 395 if (err) 396 goto err_clean; 397 398 err = register_netdev(netdev); 399 if (err) 400 goto err_repr_clean; 401 402 return 0; 403 404 err_repr_clean: 405 nfp_app_repr_clean(app, netdev); 406 err_clean: 407 dst_release((struct dst_entry *)repr->dst); 408 return err; 409 } 410 411 static void __nfp_repr_free(struct nfp_repr *repr) 412 { 413 free_percpu(repr->stats); 414 free_netdev(repr->netdev); 415 } 416 417 void nfp_repr_free(struct net_device *netdev) 418 { 419 __nfp_repr_free(netdev_priv(netdev)); 420 } 421 422 struct net_device * 423 nfp_repr_alloc_mqs(struct nfp_app *app, unsigned int txqs, unsigned int rxqs) 424 { 425 struct net_device *netdev; 426 struct nfp_repr *repr; 427 428 netdev = alloc_etherdev_mqs(sizeof(*repr), txqs, rxqs); 429 if (!netdev) 430 return NULL; 431 432 netif_carrier_off(netdev); 433 434 repr = netdev_priv(netdev); 435 repr->netdev = netdev; 436 repr->app = app; 437 438 repr->stats = netdev_alloc_pcpu_stats(struct nfp_repr_pcpu_stats); 439 if (!repr->stats) 440 goto err_free_netdev; 441 442 return netdev; 443 444 err_free_netdev: 445 free_netdev(netdev); 446 return NULL; 447 } 448 449 void nfp_repr_clean_and_free(struct nfp_repr *repr) 450 { 451 nfp_info(repr->app->cpp, "Destroying Representor(%s)\n", 452 repr->netdev->name); 453 nfp_repr_clean(repr); 454 __nfp_repr_free(repr); 455 } 456 457 void nfp_reprs_clean_and_free(struct nfp_app *app, struct nfp_reprs *reprs) 458 { 459 struct net_device *netdev; 460 unsigned int i; 461 462 for (i = 0; i < reprs->num_reprs; i++) { 463 netdev = nfp_repr_get_locked(app, reprs, i); 464 if (netdev) 465 nfp_repr_clean_and_free(netdev_priv(netdev)); 466 } 467 468 kfree(reprs); 469 } 470 471 void 472 nfp_reprs_clean_and_free_by_type(struct nfp_app *app, enum nfp_repr_type type) 473 { 474 struct net_device *netdev; 475 struct nfp_reprs *reprs; 476 int i; 477 478 reprs = rcu_dereference_protected(app->reprs[type], 479 lockdep_is_held(&app->pf->lock)); 480 if (!reprs) 481 return; 482 483 /* Preclean must happen before we remove the reprs reference from the 484 * app below. 485 */ 486 for (i = 0; i < reprs->num_reprs; i++) { 487 netdev = nfp_repr_get_locked(app, reprs, i); 488 if (netdev) 489 nfp_app_repr_preclean(app, netdev); 490 } 491 492 reprs = nfp_app_reprs_set(app, type, NULL); 493 494 synchronize_rcu(); 495 nfp_reprs_clean_and_free(app, reprs); 496 } 497 498 struct nfp_reprs *nfp_reprs_alloc(unsigned int num_reprs) 499 { 500 struct nfp_reprs *reprs; 501 502 reprs = kzalloc(struct_size(reprs, reprs, num_reprs), 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