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 #include <net/switchdev.h> 9 10 #include "nfpcore/nfp_cpp.h" 11 #include "nfpcore/nfp_nsp.h" 12 #include "nfp_app.h" 13 #include "nfp_main.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 ret; 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 const struct net_device_ops nfp_repr_netdev_ops = { 235 .ndo_init = nfp_app_ndo_init, 236 .ndo_uninit = nfp_app_ndo_uninit, 237 .ndo_open = nfp_repr_open, 238 .ndo_stop = nfp_repr_stop, 239 .ndo_start_xmit = nfp_repr_xmit, 240 .ndo_change_mtu = nfp_repr_change_mtu, 241 .ndo_get_stats64 = nfp_repr_get_stats64, 242 .ndo_has_offload_stats = nfp_repr_has_offload_stats, 243 .ndo_get_offload_stats = nfp_repr_get_offload_stats, 244 .ndo_get_phys_port_name = nfp_port_get_phys_port_name, 245 .ndo_setup_tc = nfp_port_setup_tc, 246 .ndo_set_vf_mac = nfp_app_set_vf_mac, 247 .ndo_set_vf_vlan = nfp_app_set_vf_vlan, 248 .ndo_set_vf_spoofchk = nfp_app_set_vf_spoofchk, 249 .ndo_get_vf_config = nfp_app_get_vf_config, 250 .ndo_set_vf_link_state = nfp_app_set_vf_link_state, 251 .ndo_set_features = nfp_port_set_features, 252 .ndo_set_mac_address = eth_mac_addr, 253 }; 254 255 static void nfp_repr_clean(struct nfp_repr *repr) 256 { 257 unregister_netdev(repr->netdev); 258 nfp_app_repr_clean(repr->app, repr->netdev); 259 dst_release((struct dst_entry *)repr->dst); 260 nfp_port_free(repr->port); 261 } 262 263 static struct lock_class_key nfp_repr_netdev_xmit_lock_key; 264 static struct lock_class_key nfp_repr_netdev_addr_lock_key; 265 266 static void nfp_repr_set_lockdep_class_one(struct net_device *dev, 267 struct netdev_queue *txq, 268 void *_unused) 269 { 270 lockdep_set_class(&txq->_xmit_lock, &nfp_repr_netdev_xmit_lock_key); 271 } 272 273 static void nfp_repr_set_lockdep_class(struct net_device *dev) 274 { 275 lockdep_set_class(&dev->addr_list_lock, &nfp_repr_netdev_addr_lock_key); 276 netdev_for_each_tx_queue(dev, nfp_repr_set_lockdep_class_one, NULL); 277 } 278 279 int nfp_repr_init(struct nfp_app *app, struct net_device *netdev, 280 u32 cmsg_port_id, struct nfp_port *port, 281 struct net_device *pf_netdev) 282 { 283 struct nfp_repr *repr = netdev_priv(netdev); 284 int err; 285 286 nfp_repr_set_lockdep_class(netdev); 287 288 repr->port = port; 289 repr->dst = metadata_dst_alloc(0, METADATA_HW_PORT_MUX, GFP_KERNEL); 290 if (!repr->dst) 291 return -ENOMEM; 292 repr->dst->u.port_info.port_id = cmsg_port_id; 293 repr->dst->u.port_info.lower_dev = pf_netdev; 294 295 netdev->netdev_ops = &nfp_repr_netdev_ops; 296 netdev->ethtool_ops = &nfp_port_ethtool_ops; 297 298 netdev->max_mtu = pf_netdev->max_mtu; 299 300 SWITCHDEV_SET_OPS(netdev, &nfp_port_switchdev_ops); 301 302 if (nfp_app_has_tc(app)) { 303 netdev->features |= NETIF_F_HW_TC; 304 netdev->hw_features |= NETIF_F_HW_TC; 305 } 306 307 err = nfp_app_repr_init(app, netdev); 308 if (err) 309 goto err_clean; 310 311 err = register_netdev(netdev); 312 if (err) 313 goto err_repr_clean; 314 315 return 0; 316 317 err_repr_clean: 318 nfp_app_repr_clean(app, netdev); 319 err_clean: 320 dst_release((struct dst_entry *)repr->dst); 321 return err; 322 } 323 324 static void __nfp_repr_free(struct nfp_repr *repr) 325 { 326 free_percpu(repr->stats); 327 free_netdev(repr->netdev); 328 } 329 330 void nfp_repr_free(struct net_device *netdev) 331 { 332 __nfp_repr_free(netdev_priv(netdev)); 333 } 334 335 struct net_device * 336 nfp_repr_alloc_mqs(struct nfp_app *app, unsigned int txqs, unsigned int rxqs) 337 { 338 struct net_device *netdev; 339 struct nfp_repr *repr; 340 341 netdev = alloc_etherdev_mqs(sizeof(*repr), txqs, rxqs); 342 if (!netdev) 343 return NULL; 344 345 netif_carrier_off(netdev); 346 347 repr = netdev_priv(netdev); 348 repr->netdev = netdev; 349 repr->app = app; 350 351 repr->stats = netdev_alloc_pcpu_stats(struct nfp_repr_pcpu_stats); 352 if (!repr->stats) 353 goto err_free_netdev; 354 355 return netdev; 356 357 err_free_netdev: 358 free_netdev(netdev); 359 return NULL; 360 } 361 362 void nfp_repr_clean_and_free(struct nfp_repr *repr) 363 { 364 nfp_info(repr->app->cpp, "Destroying Representor(%s)\n", 365 repr->netdev->name); 366 nfp_repr_clean(repr); 367 __nfp_repr_free(repr); 368 } 369 370 void nfp_reprs_clean_and_free(struct nfp_app *app, struct nfp_reprs *reprs) 371 { 372 struct net_device *netdev; 373 unsigned int i; 374 375 for (i = 0; i < reprs->num_reprs; i++) { 376 netdev = nfp_repr_get_locked(app, reprs, i); 377 if (netdev) 378 nfp_repr_clean_and_free(netdev_priv(netdev)); 379 } 380 381 kfree(reprs); 382 } 383 384 void 385 nfp_reprs_clean_and_free_by_type(struct nfp_app *app, enum nfp_repr_type type) 386 { 387 struct net_device *netdev; 388 struct nfp_reprs *reprs; 389 int i; 390 391 reprs = rcu_dereference_protected(app->reprs[type], 392 lockdep_is_held(&app->pf->lock)); 393 if (!reprs) 394 return; 395 396 /* Preclean must happen before we remove the reprs reference from the 397 * app below. 398 */ 399 for (i = 0; i < reprs->num_reprs; i++) { 400 netdev = nfp_repr_get_locked(app, reprs, i); 401 if (netdev) 402 nfp_app_repr_preclean(app, netdev); 403 } 404 405 reprs = nfp_app_reprs_set(app, type, NULL); 406 407 synchronize_rcu(); 408 nfp_reprs_clean_and_free(app, reprs); 409 } 410 411 struct nfp_reprs *nfp_reprs_alloc(unsigned int num_reprs) 412 { 413 struct nfp_reprs *reprs; 414 415 reprs = kzalloc(sizeof(*reprs) + 416 num_reprs * sizeof(struct net_device *), GFP_KERNEL); 417 if (!reprs) 418 return NULL; 419 reprs->num_reprs = num_reprs; 420 421 return reprs; 422 } 423 424 int nfp_reprs_resync_phys_ports(struct nfp_app *app) 425 { 426 struct net_device *netdev; 427 struct nfp_reprs *reprs; 428 struct nfp_repr *repr; 429 int i; 430 431 reprs = nfp_reprs_get_locked(app, NFP_REPR_TYPE_PHYS_PORT); 432 if (!reprs) 433 return 0; 434 435 for (i = 0; i < reprs->num_reprs; i++) { 436 netdev = nfp_repr_get_locked(app, reprs, i); 437 if (!netdev) 438 continue; 439 440 repr = netdev_priv(netdev); 441 if (repr->port->type != NFP_PORT_INVALID) 442 continue; 443 444 nfp_app_repr_preclean(app, netdev); 445 rcu_assign_pointer(reprs->reprs[i], NULL); 446 synchronize_rcu(); 447 nfp_repr_clean(repr); 448 } 449 450 return 0; 451 } 452