1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2 /* Copyright (C) 2018 Netronome Systems, Inc. */ 3 4 #include <linux/bitfield.h> 5 #include <linux/bitmap.h> 6 #include <linux/etherdevice.h> 7 #include <linux/lockdep.h> 8 #include <linux/netdevice.h> 9 #include <linux/rcupdate.h> 10 #include <linux/rtnetlink.h> 11 #include <linux/slab.h> 12 13 #include "../nfpcore/nfp.h" 14 #include "../nfpcore/nfp_cpp.h" 15 #include "../nfpcore/nfp_nsp.h" 16 #include "../nfp_app.h" 17 #include "../nfp_main.h" 18 #include "../nfp_net.h" 19 #include "../nfp_net_repr.h" 20 #include "../nfp_port.h" 21 #include "main.h" 22 23 static u32 nfp_abm_portid(enum nfp_repr_type rtype, unsigned int id) 24 { 25 return FIELD_PREP(NFP_ABM_PORTID_TYPE, rtype) | 26 FIELD_PREP(NFP_ABM_PORTID_ID, id); 27 } 28 29 static int 30 nfp_abm_setup_tc(struct nfp_app *app, struct net_device *netdev, 31 enum tc_setup_type type, void *type_data) 32 { 33 struct nfp_repr *repr = netdev_priv(netdev); 34 struct nfp_port *port; 35 36 port = nfp_port_from_netdev(netdev); 37 if (!port || port->type != NFP_PORT_PF_PORT) 38 return -EOPNOTSUPP; 39 40 switch (type) { 41 case TC_SETUP_ROOT_QDISC: 42 return nfp_abm_setup_root(netdev, repr->app_priv, type_data); 43 case TC_SETUP_QDISC_MQ: 44 return nfp_abm_setup_tc_mq(netdev, repr->app_priv, type_data); 45 case TC_SETUP_QDISC_RED: 46 return nfp_abm_setup_tc_red(netdev, repr->app_priv, type_data); 47 case TC_SETUP_QDISC_GRED: 48 return nfp_abm_setup_tc_gred(netdev, repr->app_priv, type_data); 49 case TC_SETUP_BLOCK: 50 return nfp_abm_setup_cls_block(netdev, repr, type_data); 51 default: 52 return -EOPNOTSUPP; 53 } 54 } 55 56 static struct net_device *nfp_abm_repr_get(struct nfp_app *app, u32 port_id) 57 { 58 enum nfp_repr_type rtype; 59 struct nfp_reprs *reprs; 60 u8 port; 61 62 rtype = FIELD_GET(NFP_ABM_PORTID_TYPE, port_id); 63 port = FIELD_GET(NFP_ABM_PORTID_ID, port_id); 64 65 reprs = rcu_dereference(app->reprs[rtype]); 66 if (!reprs) 67 return NULL; 68 69 if (port >= reprs->num_reprs) 70 return NULL; 71 72 return rcu_dereference(reprs->reprs[port]); 73 } 74 75 static int 76 nfp_abm_spawn_repr(struct nfp_app *app, struct nfp_abm_link *alink, 77 enum nfp_port_type ptype) 78 { 79 struct net_device *netdev; 80 enum nfp_repr_type rtype; 81 struct nfp_reprs *reprs; 82 struct nfp_repr *repr; 83 struct nfp_port *port; 84 unsigned int txqs; 85 int err; 86 87 if (ptype == NFP_PORT_PHYS_PORT) { 88 rtype = NFP_REPR_TYPE_PHYS_PORT; 89 txqs = 1; 90 } else { 91 rtype = NFP_REPR_TYPE_PF; 92 txqs = alink->vnic->max_rx_rings; 93 } 94 95 netdev = nfp_repr_alloc_mqs(app, txqs, 1); 96 if (!netdev) 97 return -ENOMEM; 98 repr = netdev_priv(netdev); 99 repr->app_priv = alink; 100 101 port = nfp_port_alloc(app, ptype, netdev); 102 if (IS_ERR(port)) { 103 err = PTR_ERR(port); 104 goto err_free_repr; 105 } 106 107 if (ptype == NFP_PORT_PHYS_PORT) { 108 port->eth_forced = true; 109 err = nfp_port_init_phy_port(app->pf, app, port, alink->id); 110 if (err) 111 goto err_free_port; 112 } else { 113 port->pf_id = alink->abm->pf_id; 114 port->pf_split = app->pf->max_data_vnics > 1; 115 port->pf_split_id = alink->id; 116 port->vnic = alink->vnic->dp.ctrl_bar; 117 } 118 119 SET_NETDEV_DEV(netdev, &alink->vnic->pdev->dev); 120 eth_hw_addr_random(netdev); 121 122 err = nfp_repr_init(app, netdev, nfp_abm_portid(rtype, alink->id), 123 port, alink->vnic->dp.netdev); 124 if (err) 125 goto err_free_port; 126 127 reprs = nfp_reprs_get_locked(app, rtype); 128 WARN(nfp_repr_get_locked(app, reprs, alink->id), "duplicate repr"); 129 rtnl_lock(); 130 rcu_assign_pointer(reprs->reprs[alink->id], netdev); 131 rtnl_unlock(); 132 133 nfp_info(app->cpp, "%s Port %d Representor(%s) created\n", 134 ptype == NFP_PORT_PF_PORT ? "PCIe" : "Phys", 135 alink->id, netdev->name); 136 137 return 0; 138 139 err_free_port: 140 nfp_port_free(port); 141 err_free_repr: 142 nfp_repr_free(netdev); 143 return err; 144 } 145 146 static void 147 nfp_abm_kill_repr(struct nfp_app *app, struct nfp_abm_link *alink, 148 enum nfp_repr_type rtype) 149 { 150 struct net_device *netdev; 151 struct nfp_reprs *reprs; 152 153 reprs = nfp_reprs_get_locked(app, rtype); 154 netdev = nfp_repr_get_locked(app, reprs, alink->id); 155 if (!netdev) 156 return; 157 rtnl_lock(); 158 rcu_assign_pointer(reprs->reprs[alink->id], NULL); 159 rtnl_unlock(); 160 synchronize_rcu(); 161 /* Cast to make sure nfp_repr_clean_and_free() takes a nfp_repr */ 162 nfp_repr_clean_and_free((struct nfp_repr *)netdev_priv(netdev)); 163 } 164 165 static void 166 nfp_abm_kill_reprs(struct nfp_abm *abm, struct nfp_abm_link *alink) 167 { 168 nfp_abm_kill_repr(abm->app, alink, NFP_REPR_TYPE_PF); 169 nfp_abm_kill_repr(abm->app, alink, NFP_REPR_TYPE_PHYS_PORT); 170 } 171 172 static void nfp_abm_kill_reprs_all(struct nfp_abm *abm) 173 { 174 struct nfp_pf *pf = abm->app->pf; 175 struct nfp_net *nn; 176 177 list_for_each_entry(nn, &pf->vnics, vnic_list) 178 nfp_abm_kill_reprs(abm, (struct nfp_abm_link *)nn->app_priv); 179 } 180 181 static enum devlink_eswitch_mode nfp_abm_eswitch_mode_get(struct nfp_app *app) 182 { 183 struct nfp_abm *abm = app->priv; 184 185 return abm->eswitch_mode; 186 } 187 188 static int nfp_abm_eswitch_set_legacy(struct nfp_abm *abm) 189 { 190 nfp_abm_kill_reprs_all(abm); 191 nfp_abm_ctrl_qm_disable(abm); 192 193 abm->eswitch_mode = DEVLINK_ESWITCH_MODE_LEGACY; 194 return 0; 195 } 196 197 static void nfp_abm_eswitch_clean_up(struct nfp_abm *abm) 198 { 199 if (abm->eswitch_mode != DEVLINK_ESWITCH_MODE_LEGACY) 200 WARN_ON(nfp_abm_eswitch_set_legacy(abm)); 201 } 202 203 static int nfp_abm_eswitch_set_switchdev(struct nfp_abm *abm) 204 { 205 struct nfp_app *app = abm->app; 206 struct nfp_pf *pf = app->pf; 207 struct nfp_net *nn; 208 int err; 209 210 err = nfp_abm_ctrl_qm_enable(abm); 211 if (err) 212 return err; 213 214 list_for_each_entry(nn, &pf->vnics, vnic_list) { 215 struct nfp_abm_link *alink = nn->app_priv; 216 217 err = nfp_abm_spawn_repr(app, alink, NFP_PORT_PHYS_PORT); 218 if (err) 219 goto err_kill_all_reprs; 220 221 err = nfp_abm_spawn_repr(app, alink, NFP_PORT_PF_PORT); 222 if (err) 223 goto err_kill_all_reprs; 224 } 225 226 abm->eswitch_mode = DEVLINK_ESWITCH_MODE_SWITCHDEV; 227 return 0; 228 229 err_kill_all_reprs: 230 nfp_abm_kill_reprs_all(abm); 231 nfp_abm_ctrl_qm_disable(abm); 232 return err; 233 } 234 235 static int nfp_abm_eswitch_mode_set(struct nfp_app *app, u16 mode) 236 { 237 struct nfp_abm *abm = app->priv; 238 239 if (abm->eswitch_mode == mode) 240 return 0; 241 242 switch (mode) { 243 case DEVLINK_ESWITCH_MODE_LEGACY: 244 return nfp_abm_eswitch_set_legacy(abm); 245 case DEVLINK_ESWITCH_MODE_SWITCHDEV: 246 return nfp_abm_eswitch_set_switchdev(abm); 247 default: 248 return -EINVAL; 249 } 250 } 251 252 static void 253 nfp_abm_vnic_set_mac(struct nfp_pf *pf, struct nfp_abm *abm, struct nfp_net *nn, 254 unsigned int id) 255 { 256 struct nfp_eth_table_port *eth_port = &pf->eth_tbl->ports[id]; 257 u8 mac_addr[ETH_ALEN]; 258 struct nfp_nsp *nsp; 259 char hwinfo[32]; 260 int err; 261 262 if (id > pf->eth_tbl->count) { 263 nfp_warn(pf->cpp, "No entry for persistent MAC address\n"); 264 eth_hw_addr_random(nn->dp.netdev); 265 return; 266 } 267 268 snprintf(hwinfo, sizeof(hwinfo), "eth%u.mac.pf%u", 269 eth_port->eth_index, abm->pf_id); 270 271 nsp = nfp_nsp_open(pf->cpp); 272 if (IS_ERR(nsp)) { 273 nfp_warn(pf->cpp, "Failed to access the NSP for persistent MAC address: %ld\n", 274 PTR_ERR(nsp)); 275 eth_hw_addr_random(nn->dp.netdev); 276 return; 277 } 278 279 if (!nfp_nsp_has_hwinfo_lookup(nsp)) { 280 nfp_warn(pf->cpp, "NSP doesn't support PF MAC generation\n"); 281 eth_hw_addr_random(nn->dp.netdev); 282 return; 283 } 284 285 err = nfp_nsp_hwinfo_lookup(nsp, hwinfo, sizeof(hwinfo)); 286 nfp_nsp_close(nsp); 287 if (err) { 288 nfp_warn(pf->cpp, "Reading persistent MAC address failed: %d\n", 289 err); 290 eth_hw_addr_random(nn->dp.netdev); 291 return; 292 } 293 294 if (sscanf(hwinfo, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", 295 &mac_addr[0], &mac_addr[1], &mac_addr[2], 296 &mac_addr[3], &mac_addr[4], &mac_addr[5]) != 6) { 297 nfp_warn(pf->cpp, "Can't parse persistent MAC address (%s)\n", 298 hwinfo); 299 eth_hw_addr_random(nn->dp.netdev); 300 return; 301 } 302 303 ether_addr_copy(nn->dp.netdev->dev_addr, mac_addr); 304 ether_addr_copy(nn->dp.netdev->perm_addr, mac_addr); 305 } 306 307 static int 308 nfp_abm_vnic_alloc(struct nfp_app *app, struct nfp_net *nn, unsigned int id) 309 { 310 struct nfp_eth_table_port *eth_port = &app->pf->eth_tbl->ports[id]; 311 struct nfp_abm *abm = app->priv; 312 struct nfp_abm_link *alink; 313 int err; 314 315 alink = kzalloc(sizeof(*alink), GFP_KERNEL); 316 if (!alink) 317 return -ENOMEM; 318 nn->app_priv = alink; 319 alink->abm = abm; 320 alink->vnic = nn; 321 alink->id = id; 322 alink->total_queues = alink->vnic->max_rx_rings; 323 324 INIT_LIST_HEAD(&alink->dscp_map); 325 326 err = nfp_abm_ctrl_read_params(alink); 327 if (err) 328 goto err_free_alink; 329 330 alink->prio_map = kzalloc(abm->prio_map_len, GFP_KERNEL); 331 if (!alink->prio_map) 332 goto err_free_alink; 333 334 /* This is a multi-host app, make sure MAC/PHY is up, but don't 335 * make the MAC/PHY state follow the state of any of the ports. 336 */ 337 err = nfp_eth_set_configured(app->cpp, eth_port->index, true); 338 if (err < 0) 339 goto err_free_priomap; 340 341 netif_keep_dst(nn->dp.netdev); 342 343 nfp_abm_vnic_set_mac(app->pf, abm, nn, id); 344 INIT_RADIX_TREE(&alink->qdiscs, GFP_KERNEL); 345 346 return 0; 347 348 err_free_priomap: 349 kfree(alink->prio_map); 350 err_free_alink: 351 kfree(alink); 352 return err; 353 } 354 355 static void nfp_abm_vnic_free(struct nfp_app *app, struct nfp_net *nn) 356 { 357 struct nfp_abm_link *alink = nn->app_priv; 358 359 nfp_abm_kill_reprs(alink->abm, alink); 360 WARN(!radix_tree_empty(&alink->qdiscs), "left over qdiscs\n"); 361 kfree(alink->prio_map); 362 kfree(alink); 363 } 364 365 static int nfp_abm_vnic_init(struct nfp_app *app, struct nfp_net *nn) 366 { 367 struct nfp_abm_link *alink = nn->app_priv; 368 369 if (nfp_abm_has_prio(alink->abm)) 370 return nfp_abm_ctrl_prio_map_update(alink, alink->prio_map); 371 return 0; 372 } 373 374 static u64 * 375 nfp_abm_port_get_stats(struct nfp_app *app, struct nfp_port *port, u64 *data) 376 { 377 struct nfp_repr *repr = netdev_priv(port->netdev); 378 struct nfp_abm_link *alink; 379 unsigned int i; 380 381 if (port->type != NFP_PORT_PF_PORT) 382 return data; 383 alink = repr->app_priv; 384 for (i = 0; i < alink->vnic->dp.num_r_vecs; i++) { 385 *data++ = nfp_abm_ctrl_stat_non_sto(alink, i); 386 *data++ = nfp_abm_ctrl_stat_sto(alink, i); 387 } 388 return data; 389 } 390 391 static int 392 nfp_abm_port_get_stats_count(struct nfp_app *app, struct nfp_port *port) 393 { 394 struct nfp_repr *repr = netdev_priv(port->netdev); 395 struct nfp_abm_link *alink; 396 397 if (port->type != NFP_PORT_PF_PORT) 398 return 0; 399 alink = repr->app_priv; 400 return alink->vnic->dp.num_r_vecs * 2; 401 } 402 403 static u8 * 404 nfp_abm_port_get_stats_strings(struct nfp_app *app, struct nfp_port *port, 405 u8 *data) 406 { 407 struct nfp_repr *repr = netdev_priv(port->netdev); 408 struct nfp_abm_link *alink; 409 unsigned int i; 410 411 if (port->type != NFP_PORT_PF_PORT) 412 return data; 413 alink = repr->app_priv; 414 for (i = 0; i < alink->vnic->dp.num_r_vecs; i++) { 415 data = nfp_pr_et(data, "q%u_no_wait", i); 416 data = nfp_pr_et(data, "q%u_delayed", i); 417 } 418 return data; 419 } 420 421 static int nfp_abm_init(struct nfp_app *app) 422 { 423 struct nfp_pf *pf = app->pf; 424 struct nfp_reprs *reprs; 425 struct nfp_abm *abm; 426 unsigned int i; 427 int err; 428 429 if (!pf->eth_tbl) { 430 nfp_err(pf->cpp, "ABM NIC requires ETH table\n"); 431 return -EINVAL; 432 } 433 if (pf->max_data_vnics != pf->eth_tbl->count) { 434 nfp_err(pf->cpp, "ETH entries don't match vNICs (%d vs %d)\n", 435 pf->max_data_vnics, pf->eth_tbl->count); 436 return -EINVAL; 437 } 438 if (!pf->mac_stats_bar) { 439 nfp_warn(app->cpp, "ABM NIC requires mac_stats symbol\n"); 440 return -EINVAL; 441 } 442 443 abm = kzalloc(sizeof(*abm), GFP_KERNEL); 444 if (!abm) 445 return -ENOMEM; 446 app->priv = abm; 447 abm->app = app; 448 449 err = nfp_abm_ctrl_find_addrs(abm); 450 if (err) 451 goto err_free_abm; 452 453 err = -ENOMEM; 454 abm->num_thresholds = array_size(abm->num_bands, NFP_NET_MAX_RX_RINGS); 455 abm->threshold_undef = bitmap_zalloc(abm->num_thresholds, GFP_KERNEL); 456 if (!abm->threshold_undef) 457 goto err_free_abm; 458 459 abm->thresholds = kvcalloc(abm->num_thresholds, 460 sizeof(*abm->thresholds), GFP_KERNEL); 461 if (!abm->thresholds) 462 goto err_free_thresh_umap; 463 for (i = 0; i < abm->num_bands * NFP_NET_MAX_RX_RINGS; i++) 464 __nfp_abm_ctrl_set_q_lvl(abm, i, NFP_ABM_LVL_INFINITY); 465 466 abm->actions = kvcalloc(abm->num_thresholds, sizeof(*abm->actions), 467 GFP_KERNEL); 468 if (!abm->actions) 469 goto err_free_thresh; 470 for (i = 0; i < abm->num_bands * NFP_NET_MAX_RX_RINGS; i++) 471 __nfp_abm_ctrl_set_q_act(abm, i, NFP_ABM_ACT_DROP); 472 473 /* We start in legacy mode, make sure advanced queuing is disabled */ 474 err = nfp_abm_ctrl_qm_disable(abm); 475 if (err) 476 goto err_free_act; 477 478 err = -ENOMEM; 479 reprs = nfp_reprs_alloc(pf->max_data_vnics); 480 if (!reprs) 481 goto err_free_act; 482 RCU_INIT_POINTER(app->reprs[NFP_REPR_TYPE_PHYS_PORT], reprs); 483 484 reprs = nfp_reprs_alloc(pf->max_data_vnics); 485 if (!reprs) 486 goto err_free_phys; 487 RCU_INIT_POINTER(app->reprs[NFP_REPR_TYPE_PF], reprs); 488 489 return 0; 490 491 err_free_phys: 492 nfp_reprs_clean_and_free_by_type(app, NFP_REPR_TYPE_PHYS_PORT); 493 err_free_act: 494 kvfree(abm->actions); 495 err_free_thresh: 496 kvfree(abm->thresholds); 497 err_free_thresh_umap: 498 bitmap_free(abm->threshold_undef); 499 err_free_abm: 500 kfree(abm); 501 app->priv = NULL; 502 return err; 503 } 504 505 static void nfp_abm_clean(struct nfp_app *app) 506 { 507 struct nfp_abm *abm = app->priv; 508 509 nfp_abm_eswitch_clean_up(abm); 510 nfp_reprs_clean_and_free_by_type(app, NFP_REPR_TYPE_PF); 511 nfp_reprs_clean_and_free_by_type(app, NFP_REPR_TYPE_PHYS_PORT); 512 bitmap_free(abm->threshold_undef); 513 kvfree(abm->actions); 514 kvfree(abm->thresholds); 515 kfree(abm); 516 app->priv = NULL; 517 } 518 519 const struct nfp_app_type app_abm = { 520 .id = NFP_APP_ACTIVE_BUFFER_MGMT_NIC, 521 .name = "abm", 522 523 .init = nfp_abm_init, 524 .clean = nfp_abm_clean, 525 526 .vnic_alloc = nfp_abm_vnic_alloc, 527 .vnic_free = nfp_abm_vnic_free, 528 .vnic_init = nfp_abm_vnic_init, 529 530 .port_get_stats = nfp_abm_port_get_stats, 531 .port_get_stats_count = nfp_abm_port_get_stats_count, 532 .port_get_stats_strings = nfp_abm_port_get_stats_strings, 533 534 .setup_tc = nfp_abm_setup_tc, 535 536 .eswitch_mode_get = nfp_abm_eswitch_mode_get, 537 .eswitch_mode_set = nfp_abm_eswitch_mode_set, 538 539 .repr_get = nfp_abm_repr_get, 540 }; 541