1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) 2016 Mellanox Technologies. All rights reserved. 4 * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com> 5 */ 6 7 #include "devl_internal.h" 8 9 #define ASSERT_DEVLINK_PORT_REGISTERED(devlink_port) \ 10 WARN_ON_ONCE(!(devlink_port)->registered) 11 #define ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port) \ 12 WARN_ON_ONCE((devlink_port)->registered) 13 14 struct devlink_port *devlink_port_get_by_index(struct devlink *devlink, 15 unsigned int port_index) 16 { 17 return xa_load(&devlink->ports, port_index); 18 } 19 20 struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink, 21 struct nlattr **attrs) 22 { 23 if (attrs[DEVLINK_ATTR_PORT_INDEX]) { 24 u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]); 25 struct devlink_port *devlink_port; 26 27 devlink_port = devlink_port_get_by_index(devlink, port_index); 28 if (!devlink_port) 29 return ERR_PTR(-ENODEV); 30 return devlink_port; 31 } 32 return ERR_PTR(-EINVAL); 33 } 34 35 struct devlink_port *devlink_port_get_from_info(struct devlink *devlink, 36 struct genl_info *info) 37 { 38 return devlink_port_get_from_attrs(devlink, info->attrs); 39 } 40 41 static void devlink_port_fn_cap_fill(struct nla_bitfield32 *caps, 42 u32 cap, bool is_enable) 43 { 44 caps->selector |= cap; 45 if (is_enable) 46 caps->value |= cap; 47 } 48 49 static int devlink_port_fn_roce_fill(struct devlink_port *devlink_port, 50 struct nla_bitfield32 *caps, 51 struct netlink_ext_ack *extack) 52 { 53 bool is_enable; 54 int err; 55 56 if (!devlink_port->ops->port_fn_roce_get) 57 return 0; 58 59 err = devlink_port->ops->port_fn_roce_get(devlink_port, &is_enable, 60 extack); 61 if (err) { 62 if (err == -EOPNOTSUPP) 63 return 0; 64 return err; 65 } 66 67 devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_ROCE, is_enable); 68 return 0; 69 } 70 71 static int devlink_port_fn_migratable_fill(struct devlink_port *devlink_port, 72 struct nla_bitfield32 *caps, 73 struct netlink_ext_ack *extack) 74 { 75 bool is_enable; 76 int err; 77 78 if (!devlink_port->ops->port_fn_migratable_get || 79 devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) 80 return 0; 81 82 err = devlink_port->ops->port_fn_migratable_get(devlink_port, 83 &is_enable, extack); 84 if (err) { 85 if (err == -EOPNOTSUPP) 86 return 0; 87 return err; 88 } 89 90 devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_MIGRATABLE, is_enable); 91 return 0; 92 } 93 94 static int devlink_port_fn_ipsec_crypto_fill(struct devlink_port *devlink_port, 95 struct nla_bitfield32 *caps, 96 struct netlink_ext_ack *extack) 97 { 98 bool is_enable; 99 int err; 100 101 if (!devlink_port->ops->port_fn_ipsec_crypto_get || 102 devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) 103 return 0; 104 105 err = devlink_port->ops->port_fn_ipsec_crypto_get(devlink_port, &is_enable, extack); 106 if (err) { 107 if (err == -EOPNOTSUPP) 108 return 0; 109 return err; 110 } 111 112 devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO, is_enable); 113 return 0; 114 } 115 116 static int devlink_port_fn_ipsec_packet_fill(struct devlink_port *devlink_port, 117 struct nla_bitfield32 *caps, 118 struct netlink_ext_ack *extack) 119 { 120 bool is_enable; 121 int err; 122 123 if (!devlink_port->ops->port_fn_ipsec_packet_get || 124 devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) 125 return 0; 126 127 err = devlink_port->ops->port_fn_ipsec_packet_get(devlink_port, &is_enable, extack); 128 if (err) { 129 if (err == -EOPNOTSUPP) 130 return 0; 131 return err; 132 } 133 134 devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_IPSEC_PACKET, is_enable); 135 return 0; 136 } 137 138 static int devlink_port_fn_caps_fill(struct devlink_port *devlink_port, 139 struct sk_buff *msg, 140 struct netlink_ext_ack *extack, 141 bool *msg_updated) 142 { 143 struct nla_bitfield32 caps = {}; 144 int err; 145 146 err = devlink_port_fn_roce_fill(devlink_port, &caps, extack); 147 if (err) 148 return err; 149 150 err = devlink_port_fn_migratable_fill(devlink_port, &caps, extack); 151 if (err) 152 return err; 153 154 err = devlink_port_fn_ipsec_crypto_fill(devlink_port, &caps, extack); 155 if (err) 156 return err; 157 158 err = devlink_port_fn_ipsec_packet_fill(devlink_port, &caps, extack); 159 if (err) 160 return err; 161 162 if (!caps.selector) 163 return 0; 164 err = nla_put_bitfield32(msg, DEVLINK_PORT_FN_ATTR_CAPS, caps.value, 165 caps.selector); 166 if (err) 167 return err; 168 169 *msg_updated = true; 170 return 0; 171 } 172 173 static int devlink_port_fn_max_io_eqs_fill(struct devlink_port *port, 174 struct sk_buff *msg, 175 struct netlink_ext_ack *extack, 176 bool *msg_updated) 177 { 178 u32 max_io_eqs; 179 int err; 180 181 if (!port->ops->port_fn_max_io_eqs_get) 182 return 0; 183 184 err = port->ops->port_fn_max_io_eqs_get(port, &max_io_eqs, extack); 185 if (err) { 186 if (err == -EOPNOTSUPP) 187 return 0; 188 return err; 189 } 190 err = nla_put_u32(msg, DEVLINK_PORT_FN_ATTR_MAX_IO_EQS, max_io_eqs); 191 if (err) 192 return err; 193 *msg_updated = true; 194 return 0; 195 } 196 197 int devlink_nl_port_handle_fill(struct sk_buff *msg, struct devlink_port *devlink_port) 198 { 199 if (devlink_nl_put_handle(msg, devlink_port->devlink)) 200 return -EMSGSIZE; 201 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index)) 202 return -EMSGSIZE; 203 return 0; 204 } 205 206 size_t devlink_nl_port_handle_size(struct devlink_port *devlink_port) 207 { 208 struct devlink *devlink = devlink_port->devlink; 209 210 return nla_total_size(strlen(devlink_bus_name(devlink)) + 1) /* DEVLINK_ATTR_BUS_NAME */ 211 + nla_total_size(strlen(devlink_dev_name(devlink)) + 1) /* DEVLINK_ATTR_DEV_NAME */ 212 + nla_total_size(8) /* DEVLINK_ATTR_INDEX */ 213 + nla_total_size(4); /* DEVLINK_ATTR_PORT_INDEX */ 214 } 215 216 static int devlink_nl_port_attrs_put(struct sk_buff *msg, 217 struct devlink_port *devlink_port) 218 { 219 struct devlink_port_attrs *attrs = &devlink_port->attrs; 220 221 if (!devlink_port->attrs_set) 222 return 0; 223 if (attrs->lanes) { 224 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_LANES, attrs->lanes)) 225 return -EMSGSIZE; 226 } 227 if (nla_put_u8(msg, DEVLINK_ATTR_PORT_SPLITTABLE, attrs->splittable)) 228 return -EMSGSIZE; 229 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_FLAVOUR, attrs->flavour)) 230 return -EMSGSIZE; 231 switch (devlink_port->attrs.flavour) { 232 case DEVLINK_PORT_FLAVOUR_PCI_PF: 233 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER, 234 attrs->pci_pf.controller) || 235 nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_pf.pf)) 236 return -EMSGSIZE; 237 if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_pf.external)) 238 return -EMSGSIZE; 239 break; 240 case DEVLINK_PORT_FLAVOUR_PCI_VF: 241 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER, 242 attrs->pci_vf.controller) || 243 nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_vf.pf) || 244 nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_VF_NUMBER, attrs->pci_vf.vf)) 245 return -EMSGSIZE; 246 if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_vf.external)) 247 return -EMSGSIZE; 248 break; 249 case DEVLINK_PORT_FLAVOUR_PCI_SF: 250 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER, 251 attrs->pci_sf.controller) || 252 nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, 253 attrs->pci_sf.pf) || 254 nla_put_u32(msg, DEVLINK_ATTR_PORT_PCI_SF_NUMBER, 255 attrs->pci_sf.sf)) 256 return -EMSGSIZE; 257 if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_sf.external)) 258 return -EMSGSIZE; 259 break; 260 case DEVLINK_PORT_FLAVOUR_PHYSICAL: 261 case DEVLINK_PORT_FLAVOUR_CPU: 262 case DEVLINK_PORT_FLAVOUR_DSA: 263 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER, 264 attrs->phys.port_number)) 265 return -EMSGSIZE; 266 if (!attrs->split) 267 return 0; 268 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP, 269 attrs->phys.port_number)) 270 return -EMSGSIZE; 271 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER, 272 attrs->phys.split_subport_number)) 273 return -EMSGSIZE; 274 break; 275 default: 276 break; 277 } 278 return 0; 279 } 280 281 static int devlink_port_fn_hw_addr_fill(struct devlink_port *port, 282 struct sk_buff *msg, 283 struct netlink_ext_ack *extack, 284 bool *msg_updated) 285 { 286 u8 hw_addr[MAX_ADDR_LEN]; 287 int hw_addr_len; 288 int err; 289 290 if (!port->ops->port_fn_hw_addr_get) 291 return 0; 292 293 err = port->ops->port_fn_hw_addr_get(port, hw_addr, &hw_addr_len, 294 extack); 295 if (err) { 296 if (err == -EOPNOTSUPP) 297 return 0; 298 return err; 299 } 300 err = nla_put(msg, DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR, hw_addr_len, hw_addr); 301 if (err) 302 return err; 303 *msg_updated = true; 304 return 0; 305 } 306 307 static bool 308 devlink_port_fn_state_valid(enum devlink_port_fn_state state) 309 { 310 return state == DEVLINK_PORT_FN_STATE_INACTIVE || 311 state == DEVLINK_PORT_FN_STATE_ACTIVE; 312 } 313 314 static bool 315 devlink_port_fn_opstate_valid(enum devlink_port_fn_opstate opstate) 316 { 317 return opstate == DEVLINK_PORT_FN_OPSTATE_DETACHED || 318 opstate == DEVLINK_PORT_FN_OPSTATE_ATTACHED; 319 } 320 321 static int devlink_port_fn_state_fill(struct devlink_port *port, 322 struct sk_buff *msg, 323 struct netlink_ext_ack *extack, 324 bool *msg_updated) 325 { 326 enum devlink_port_fn_opstate opstate; 327 enum devlink_port_fn_state state; 328 int err; 329 330 if (!port->ops->port_fn_state_get) 331 return 0; 332 333 err = port->ops->port_fn_state_get(port, &state, &opstate, extack); 334 if (err) { 335 if (err == -EOPNOTSUPP) 336 return 0; 337 return err; 338 } 339 if (!devlink_port_fn_state_valid(state)) { 340 WARN_ON_ONCE(1); 341 NL_SET_ERR_MSG(extack, "Invalid state read from driver"); 342 return -EINVAL; 343 } 344 if (!devlink_port_fn_opstate_valid(opstate)) { 345 WARN_ON_ONCE(1); 346 NL_SET_ERR_MSG(extack, "Invalid operational state read from driver"); 347 return -EINVAL; 348 } 349 if (nla_put_u8(msg, DEVLINK_PORT_FN_ATTR_STATE, state) || 350 nla_put_u8(msg, DEVLINK_PORT_FN_ATTR_OPSTATE, opstate)) 351 return -EMSGSIZE; 352 *msg_updated = true; 353 return 0; 354 } 355 356 static int 357 devlink_port_fn_mig_set(struct devlink_port *devlink_port, bool enable, 358 struct netlink_ext_ack *extack) 359 { 360 return devlink_port->ops->port_fn_migratable_set(devlink_port, enable, 361 extack); 362 } 363 364 static int 365 devlink_port_fn_roce_set(struct devlink_port *devlink_port, bool enable, 366 struct netlink_ext_ack *extack) 367 { 368 return devlink_port->ops->port_fn_roce_set(devlink_port, enable, 369 extack); 370 } 371 372 static int 373 devlink_port_fn_ipsec_crypto_set(struct devlink_port *devlink_port, bool enable, 374 struct netlink_ext_ack *extack) 375 { 376 return devlink_port->ops->port_fn_ipsec_crypto_set(devlink_port, enable, extack); 377 } 378 379 static int 380 devlink_port_fn_ipsec_packet_set(struct devlink_port *devlink_port, bool enable, 381 struct netlink_ext_ack *extack) 382 { 383 return devlink_port->ops->port_fn_ipsec_packet_set(devlink_port, enable, extack); 384 } 385 386 static int devlink_port_fn_caps_set(struct devlink_port *devlink_port, 387 const struct nlattr *attr, 388 struct netlink_ext_ack *extack) 389 { 390 struct nla_bitfield32 caps; 391 u32 caps_value; 392 int err; 393 394 caps = nla_get_bitfield32(attr); 395 caps_value = caps.value & caps.selector; 396 if (caps.selector & DEVLINK_PORT_FN_CAP_ROCE) { 397 err = devlink_port_fn_roce_set(devlink_port, 398 caps_value & DEVLINK_PORT_FN_CAP_ROCE, 399 extack); 400 if (err) 401 return err; 402 } 403 if (caps.selector & DEVLINK_PORT_FN_CAP_MIGRATABLE) { 404 err = devlink_port_fn_mig_set(devlink_port, caps_value & 405 DEVLINK_PORT_FN_CAP_MIGRATABLE, 406 extack); 407 if (err) 408 return err; 409 } 410 if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO) { 411 err = devlink_port_fn_ipsec_crypto_set(devlink_port, caps_value & 412 DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO, 413 extack); 414 if (err) 415 return err; 416 } 417 if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_PACKET) { 418 err = devlink_port_fn_ipsec_packet_set(devlink_port, caps_value & 419 DEVLINK_PORT_FN_CAP_IPSEC_PACKET, 420 extack); 421 if (err) 422 return err; 423 } 424 return 0; 425 } 426 427 static int 428 devlink_port_fn_max_io_eqs_set(struct devlink_port *devlink_port, 429 const struct nlattr *attr, 430 struct netlink_ext_ack *extack) 431 { 432 u32 max_io_eqs; 433 434 max_io_eqs = nla_get_u32(attr); 435 return devlink_port->ops->port_fn_max_io_eqs_set(devlink_port, 436 max_io_eqs, extack); 437 } 438 439 static int 440 devlink_nl_port_function_attrs_put(struct sk_buff *msg, struct devlink_port *port, 441 struct netlink_ext_ack *extack) 442 { 443 struct nlattr *function_attr; 444 bool msg_updated = false; 445 int err; 446 447 function_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PORT_FUNCTION); 448 if (!function_attr) 449 return -EMSGSIZE; 450 451 err = devlink_port_fn_hw_addr_fill(port, msg, extack, &msg_updated); 452 if (err) 453 goto out; 454 err = devlink_port_fn_caps_fill(port, msg, extack, &msg_updated); 455 if (err) 456 goto out; 457 err = devlink_port_fn_state_fill(port, msg, extack, &msg_updated); 458 if (err) 459 goto out; 460 err = devlink_port_fn_max_io_eqs_fill(port, msg, extack, &msg_updated); 461 if (err) 462 goto out; 463 err = devlink_rel_devlink_handle_put(msg, port->devlink, 464 port->rel_index, 465 DEVLINK_PORT_FN_ATTR_DEVLINK, 466 &msg_updated); 467 468 out: 469 if (err || !msg_updated) 470 nla_nest_cancel(msg, function_attr); 471 else 472 nla_nest_end(msg, function_attr); 473 return err; 474 } 475 476 static int devlink_nl_port_fill(struct sk_buff *msg, 477 struct devlink_port *devlink_port, 478 enum devlink_command cmd, u32 portid, u32 seq, 479 int flags, struct netlink_ext_ack *extack) 480 { 481 struct devlink *devlink = devlink_port->devlink; 482 void *hdr; 483 484 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); 485 if (!hdr) 486 return -EMSGSIZE; 487 488 if (devlink_nl_put_handle(msg, devlink)) 489 goto nla_put_failure; 490 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index)) 491 goto nla_put_failure; 492 493 spin_lock_bh(&devlink_port->type_lock); 494 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type)) 495 goto nla_put_failure_type_locked; 496 if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET && 497 nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE, 498 devlink_port->desired_type)) 499 goto nla_put_failure_type_locked; 500 if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) { 501 if (devlink_port->type_eth.netdev && 502 (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX, 503 devlink_port->type_eth.ifindex) || 504 nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME, 505 devlink_port->type_eth.ifname))) 506 goto nla_put_failure_type_locked; 507 } 508 if (devlink_port->type == DEVLINK_PORT_TYPE_IB) { 509 struct ib_device *ibdev = devlink_port->type_ib.ibdev; 510 511 if (ibdev && 512 nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME, 513 ibdev->name)) 514 goto nla_put_failure_type_locked; 515 } 516 spin_unlock_bh(&devlink_port->type_lock); 517 if (devlink_nl_port_attrs_put(msg, devlink_port)) 518 goto nla_put_failure; 519 if (devlink_nl_port_function_attrs_put(msg, devlink_port, extack)) 520 goto nla_put_failure; 521 if (devlink_port->linecard && 522 nla_put_u32(msg, DEVLINK_ATTR_LINECARD_INDEX, 523 devlink_linecard_index(devlink_port->linecard))) 524 goto nla_put_failure; 525 526 genlmsg_end(msg, hdr); 527 return 0; 528 529 nla_put_failure_type_locked: 530 spin_unlock_bh(&devlink_port->type_lock); 531 nla_put_failure: 532 genlmsg_cancel(msg, hdr); 533 return -EMSGSIZE; 534 } 535 536 static void devlink_port_notify(struct devlink_port *devlink_port, 537 enum devlink_command cmd) 538 { 539 struct devlink *devlink = devlink_port->devlink; 540 struct devlink_obj_desc desc; 541 struct sk_buff *msg; 542 int err; 543 544 WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL); 545 546 if (!__devl_is_registered(devlink) || !devlink_nl_notify_need(devlink)) 547 return; 548 549 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 550 if (!msg) 551 return; 552 553 err = devlink_nl_port_fill(msg, devlink_port, cmd, 0, 0, 0, NULL); 554 if (err) { 555 nlmsg_free(msg); 556 return; 557 } 558 559 devlink_nl_obj_desc_init(&desc, devlink); 560 devlink_nl_obj_desc_port_set(&desc, devlink_port); 561 devlink_nl_notify_send_desc(devlink, msg, &desc); 562 } 563 564 static void devlink_ports_notify(struct devlink *devlink, 565 enum devlink_command cmd) 566 { 567 struct devlink_port *devlink_port; 568 unsigned long port_index; 569 570 xa_for_each(&devlink->ports, port_index, devlink_port) 571 devlink_port_notify(devlink_port, cmd); 572 } 573 574 void devlink_ports_notify_register(struct devlink *devlink) 575 { 576 devlink_ports_notify(devlink, DEVLINK_CMD_PORT_NEW); 577 } 578 579 void devlink_ports_notify_unregister(struct devlink *devlink) 580 { 581 devlink_ports_notify(devlink, DEVLINK_CMD_PORT_DEL); 582 } 583 584 int devlink_nl_port_get_doit(struct sk_buff *skb, struct genl_info *info) 585 { 586 struct devlink_port *devlink_port = devlink_nl_ctx(info)->devlink_port; 587 struct sk_buff *msg; 588 int err; 589 590 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 591 if (!msg) 592 return -ENOMEM; 593 594 err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_PORT_NEW, 595 info->snd_portid, info->snd_seq, 0, 596 info->extack); 597 if (err) { 598 nlmsg_free(msg); 599 return err; 600 } 601 602 return genlmsg_reply(msg, info); 603 } 604 605 static int 606 devlink_nl_port_get_dump_one(struct sk_buff *msg, struct devlink *devlink, 607 struct netlink_callback *cb, int flags) 608 { 609 struct devlink_nl_dump_state *state = devlink_dump_state(cb); 610 struct devlink_port *devlink_port; 611 unsigned long port_index; 612 int err = 0; 613 614 xa_for_each_start(&devlink->ports, port_index, devlink_port, state->idx) { 615 err = devlink_nl_port_fill(msg, devlink_port, 616 DEVLINK_CMD_PORT_NEW, 617 NETLINK_CB(cb->skb).portid, 618 cb->nlh->nlmsg_seq, flags, 619 cb->extack); 620 if (err) { 621 state->idx = port_index; 622 break; 623 } 624 } 625 626 return err; 627 } 628 629 int devlink_nl_port_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb) 630 { 631 return devlink_nl_dumpit(skb, cb, devlink_nl_port_get_dump_one); 632 } 633 634 static int devlink_port_type_set(struct devlink_port *devlink_port, 635 enum devlink_port_type port_type) 636 637 { 638 int err; 639 640 if (!devlink_port->ops->port_type_set) 641 return -EOPNOTSUPP; 642 643 if (port_type == devlink_port->type) 644 return 0; 645 646 err = devlink_port->ops->port_type_set(devlink_port, port_type); 647 if (err) 648 return err; 649 650 devlink_port->desired_type = port_type; 651 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); 652 return 0; 653 } 654 655 static int devlink_port_function_hw_addr_set(struct devlink_port *port, 656 const struct nlattr *attr, 657 struct netlink_ext_ack *extack) 658 { 659 const u8 *hw_addr; 660 int hw_addr_len; 661 662 hw_addr = nla_data(attr); 663 hw_addr_len = nla_len(attr); 664 if (hw_addr_len > MAX_ADDR_LEN) { 665 NL_SET_ERR_MSG(extack, "Port function hardware address too long"); 666 return -EINVAL; 667 } 668 if (port->type == DEVLINK_PORT_TYPE_ETH) { 669 if (hw_addr_len != ETH_ALEN) { 670 NL_SET_ERR_MSG(extack, "Address must be 6 bytes for Ethernet device"); 671 return -EINVAL; 672 } 673 if (!is_unicast_ether_addr(hw_addr)) { 674 NL_SET_ERR_MSG(extack, "Non-unicast hardware address unsupported"); 675 return -EINVAL; 676 } 677 } 678 679 return port->ops->port_fn_hw_addr_set(port, hw_addr, hw_addr_len, 680 extack); 681 } 682 683 static int devlink_port_fn_state_set(struct devlink_port *port, 684 const struct nlattr *attr, 685 struct netlink_ext_ack *extack) 686 { 687 enum devlink_port_fn_state state; 688 689 state = nla_get_u8(attr); 690 return port->ops->port_fn_state_set(port, state, extack); 691 } 692 693 static int devlink_port_function_validate(struct devlink_port *devlink_port, 694 struct nlattr **tb, 695 struct netlink_ext_ack *extack) 696 { 697 const struct devlink_port_ops *ops = devlink_port->ops; 698 struct nlattr *attr; 699 700 if (tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] && 701 !ops->port_fn_hw_addr_set) { 702 NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR], 703 "Port doesn't support function attributes"); 704 return -EOPNOTSUPP; 705 } 706 if (tb[DEVLINK_PORT_FN_ATTR_STATE] && !ops->port_fn_state_set) { 707 NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FN_ATTR_STATE], 708 "Function does not support state setting"); 709 return -EOPNOTSUPP; 710 } 711 attr = tb[DEVLINK_PORT_FN_ATTR_CAPS]; 712 if (attr) { 713 struct nla_bitfield32 caps; 714 715 caps = nla_get_bitfield32(attr); 716 if (caps.selector & DEVLINK_PORT_FN_CAP_ROCE && 717 !ops->port_fn_roce_set) { 718 NL_SET_ERR_MSG_ATTR(extack, attr, 719 "Port doesn't support RoCE function attribute"); 720 return -EOPNOTSUPP; 721 } 722 if (caps.selector & DEVLINK_PORT_FN_CAP_MIGRATABLE) { 723 if (!ops->port_fn_migratable_set) { 724 NL_SET_ERR_MSG_ATTR(extack, attr, 725 "Port doesn't support migratable function attribute"); 726 return -EOPNOTSUPP; 727 } 728 if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) { 729 NL_SET_ERR_MSG_ATTR(extack, attr, 730 "migratable function attribute supported for VFs only"); 731 return -EOPNOTSUPP; 732 } 733 } 734 if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO) { 735 if (!ops->port_fn_ipsec_crypto_set) { 736 NL_SET_ERR_MSG_ATTR(extack, attr, 737 "Port doesn't support ipsec_crypto function attribute"); 738 return -EOPNOTSUPP; 739 } 740 if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) { 741 NL_SET_ERR_MSG_ATTR(extack, attr, 742 "ipsec_crypto function attribute supported for VFs only"); 743 return -EOPNOTSUPP; 744 } 745 } 746 if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_PACKET) { 747 if (!ops->port_fn_ipsec_packet_set) { 748 NL_SET_ERR_MSG_ATTR(extack, attr, 749 "Port doesn't support ipsec_packet function attribute"); 750 return -EOPNOTSUPP; 751 } 752 if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) { 753 NL_SET_ERR_MSG_ATTR(extack, attr, 754 "ipsec_packet function attribute supported for VFs only"); 755 return -EOPNOTSUPP; 756 } 757 } 758 } 759 if (tb[DEVLINK_PORT_FN_ATTR_MAX_IO_EQS] && 760 !ops->port_fn_max_io_eqs_set) { 761 NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FN_ATTR_MAX_IO_EQS], 762 "Function does not support max_io_eqs setting"); 763 return -EOPNOTSUPP; 764 } 765 return 0; 766 } 767 768 static int devlink_port_function_set(struct devlink_port *port, 769 const struct nlattr *attr, 770 struct netlink_ext_ack *extack) 771 { 772 struct nlattr *tb[ARRAY_SIZE(devlink_dl_port_function_set_nl_policy)]; 773 int err; 774 775 err = nla_parse_nested(tb, ARRAY_SIZE(tb) - 1, attr, 776 devlink_dl_port_function_set_nl_policy, extack); 777 if (err < 0) { 778 NL_SET_ERR_MSG(extack, "Fail to parse port function attributes"); 779 return err; 780 } 781 782 err = devlink_port_function_validate(port, tb, extack); 783 if (err) 784 return err; 785 786 attr = tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR]; 787 if (attr) { 788 err = devlink_port_function_hw_addr_set(port, attr, extack); 789 if (err) 790 return err; 791 } 792 793 attr = tb[DEVLINK_PORT_FN_ATTR_CAPS]; 794 if (attr) { 795 err = devlink_port_fn_caps_set(port, attr, extack); 796 if (err) 797 return err; 798 } 799 800 attr = tb[DEVLINK_PORT_FN_ATTR_MAX_IO_EQS]; 801 if (attr) { 802 err = devlink_port_fn_max_io_eqs_set(port, attr, extack); 803 if (err) 804 return err; 805 } 806 807 /* Keep this as the last function attribute set, so that when 808 * multiple port function attributes are set along with state, 809 * Those can be applied first before activating the state. 810 */ 811 attr = tb[DEVLINK_PORT_FN_ATTR_STATE]; 812 if (attr) 813 err = devlink_port_fn_state_set(port, attr, extack); 814 815 if (!err) 816 devlink_port_notify(port, DEVLINK_CMD_PORT_NEW); 817 return err; 818 } 819 820 int devlink_nl_port_set_doit(struct sk_buff *skb, struct genl_info *info) 821 { 822 struct devlink_port *devlink_port = devlink_nl_ctx(info)->devlink_port; 823 int err; 824 825 if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) { 826 enum devlink_port_type port_type; 827 828 port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]); 829 err = devlink_port_type_set(devlink_port, port_type); 830 if (err) 831 return err; 832 } 833 834 if (info->attrs[DEVLINK_ATTR_PORT_FUNCTION]) { 835 struct nlattr *attr = info->attrs[DEVLINK_ATTR_PORT_FUNCTION]; 836 struct netlink_ext_ack *extack = info->extack; 837 838 err = devlink_port_function_set(devlink_port, attr, extack); 839 if (err) 840 return err; 841 } 842 843 return 0; 844 } 845 846 int devlink_nl_port_split_doit(struct sk_buff *skb, struct genl_info *info) 847 { 848 struct devlink_port *devlink_port = devlink_nl_ctx(info)->devlink_port; 849 struct devlink *devlink = devlink_nl_ctx(info)->devlink; 850 u32 count; 851 852 if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PORT_SPLIT_COUNT)) 853 return -EINVAL; 854 if (!devlink_port->ops->port_split) 855 return -EOPNOTSUPP; 856 857 count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]); 858 859 if (!devlink_port->attrs.splittable) { 860 /* Split ports cannot be split. */ 861 if (devlink_port->attrs.split) 862 NL_SET_ERR_MSG(info->extack, "Port cannot be split further"); 863 else 864 NL_SET_ERR_MSG(info->extack, "Port cannot be split"); 865 return -EINVAL; 866 } 867 868 if (count < 2 || !is_power_of_2(count) || count > devlink_port->attrs.lanes) { 869 NL_SET_ERR_MSG(info->extack, "Invalid split count"); 870 return -EINVAL; 871 } 872 873 return devlink_port->ops->port_split(devlink, devlink_port, count, 874 info->extack); 875 } 876 877 int devlink_nl_port_unsplit_doit(struct sk_buff *skb, struct genl_info *info) 878 { 879 struct devlink_port *devlink_port = devlink_nl_ctx(info)->devlink_port; 880 struct devlink *devlink = devlink_nl_ctx(info)->devlink; 881 882 if (!devlink_port->ops->port_unsplit) 883 return -EOPNOTSUPP; 884 return devlink_port->ops->port_unsplit(devlink, devlink_port, info->extack); 885 } 886 887 int devlink_nl_port_new_doit(struct sk_buff *skb, struct genl_info *info) 888 { 889 struct netlink_ext_ack *extack = info->extack; 890 struct devlink_port_new_attrs new_attrs = {}; 891 struct devlink *devlink = devlink_nl_ctx(info)->devlink; 892 struct devlink_port *devlink_port; 893 struct sk_buff *msg; 894 int err; 895 896 if (!devlink->ops->port_new) 897 return -EOPNOTSUPP; 898 899 if (!info->attrs[DEVLINK_ATTR_PORT_FLAVOUR] || 900 !info->attrs[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]) { 901 NL_SET_ERR_MSG(extack, "Port flavour or PCI PF are not specified"); 902 return -EINVAL; 903 } 904 new_attrs.flavour = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_FLAVOUR]); 905 new_attrs.pfnum = 906 nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]); 907 908 if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) { 909 /* Port index of the new port being created by driver. */ 910 new_attrs.port_index = 911 nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]); 912 new_attrs.port_index_valid = true; 913 } 914 if (info->attrs[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER]) { 915 new_attrs.controller = 916 nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER]); 917 new_attrs.controller_valid = true; 918 } 919 if (new_attrs.flavour == DEVLINK_PORT_FLAVOUR_PCI_SF && 920 info->attrs[DEVLINK_ATTR_PORT_PCI_SF_NUMBER]) { 921 new_attrs.sfnum = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_PCI_SF_NUMBER]); 922 new_attrs.sfnum_valid = true; 923 } 924 925 err = devlink->ops->port_new(devlink, &new_attrs, 926 extack, &devlink_port); 927 if (err) 928 return err; 929 930 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 931 if (!msg) { 932 err = -ENOMEM; 933 goto err_out_port_del; 934 } 935 err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_PORT_NEW, 936 info->snd_portid, info->snd_seq, 0, NULL); 937 if (WARN_ON_ONCE(err)) 938 goto err_out_msg_free; 939 err = genlmsg_reply(msg, info); 940 if (err) 941 goto err_out_port_del; 942 return 0; 943 944 err_out_msg_free: 945 nlmsg_free(msg); 946 err_out_port_del: 947 devlink_port->ops->port_del(devlink, devlink_port, NULL); 948 return err; 949 } 950 951 int devlink_nl_port_del_doit(struct sk_buff *skb, struct genl_info *info) 952 { 953 struct devlink_port *devlink_port = devlink_nl_ctx(info)->devlink_port; 954 struct netlink_ext_ack *extack = info->extack; 955 struct devlink *devlink = devlink_nl_ctx(info)->devlink; 956 957 if (!devlink_port->ops->port_del) 958 return -EOPNOTSUPP; 959 960 return devlink_port->ops->port_del(devlink, devlink_port, extack); 961 } 962 963 static void devlink_port_type_warn(struct work_struct *work) 964 { 965 struct devlink_port *port = container_of(to_delayed_work(work), 966 struct devlink_port, 967 type_warn_dw); 968 devl_warn(port->devlink, "Type was not set for devlink port."); 969 } 970 971 static bool devlink_port_type_should_warn(struct devlink_port *devlink_port) 972 { 973 /* Ignore CPU and DSA flavours. */ 974 return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU && 975 devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA && 976 devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_UNUSED; 977 } 978 979 #define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 3600) 980 981 static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port) 982 { 983 if (!devlink_port_type_should_warn(devlink_port)) 984 return; 985 /* Schedule a work to WARN in case driver does not set port 986 * type within timeout. 987 */ 988 schedule_delayed_work(&devlink_port->type_warn_dw, 989 DEVLINK_PORT_TYPE_WARN_TIMEOUT); 990 } 991 992 static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port) 993 { 994 if (!devlink_port_type_should_warn(devlink_port)) 995 return; 996 cancel_delayed_work_sync(&devlink_port->type_warn_dw); 997 } 998 999 /** 1000 * devlink_port_init() - Init devlink port 1001 * 1002 * @devlink: devlink 1003 * @devlink_port: devlink port 1004 * 1005 * Initialize essential stuff that is needed for functions 1006 * that may be called before devlink port registration. 1007 * Call to this function is optional and not needed 1008 * in case the driver does not use such functions. 1009 */ 1010 void devlink_port_init(struct devlink *devlink, 1011 struct devlink_port *devlink_port) 1012 { 1013 if (devlink_port->initialized) 1014 return; 1015 devlink_port->devlink = devlink; 1016 INIT_LIST_HEAD(&devlink_port->region_list); 1017 INIT_LIST_HEAD(&devlink_port->resource_list); 1018 devlink_port->initialized = true; 1019 } 1020 EXPORT_SYMBOL_GPL(devlink_port_init); 1021 1022 /** 1023 * devlink_port_fini() - Deinitialize devlink port 1024 * 1025 * @devlink_port: devlink port 1026 * 1027 * Deinitialize essential stuff that is in use for functions 1028 * that may be called after devlink port unregistration. 1029 * Call to this function is optional and not needed 1030 * in case the driver does not use such functions. 1031 */ 1032 void devlink_port_fini(struct devlink_port *devlink_port) 1033 { 1034 WARN_ON(!list_empty(&devlink_port->region_list)); 1035 WARN_ON(!list_empty(&devlink_port->resource_list)); 1036 } 1037 EXPORT_SYMBOL_GPL(devlink_port_fini); 1038 1039 static const struct devlink_port_ops devlink_port_dummy_ops = {}; 1040 1041 /** 1042 * devl_port_register_with_ops() - Register devlink port 1043 * 1044 * @devlink: devlink 1045 * @devlink_port: devlink port 1046 * @port_index: driver-specific numerical identifier of the port 1047 * @ops: port ops 1048 * 1049 * Register devlink port with provided port index. User can use 1050 * any indexing, even hw-related one. devlink_port structure 1051 * is convenient to be embedded inside user driver private structure. 1052 * Note that the caller should take care of zeroing the devlink_port 1053 * structure. 1054 */ 1055 int devl_port_register_with_ops(struct devlink *devlink, 1056 struct devlink_port *devlink_port, 1057 unsigned int port_index, 1058 const struct devlink_port_ops *ops) 1059 { 1060 int err; 1061 1062 devl_assert_locked(devlink); 1063 1064 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); 1065 1066 devlink_port_init(devlink, devlink_port); 1067 devlink_port->registered = true; 1068 devlink_port->index = port_index; 1069 devlink_port->ops = ops ? ops : &devlink_port_dummy_ops; 1070 spin_lock_init(&devlink_port->type_lock); 1071 INIT_LIST_HEAD(&devlink_port->reporter_list); 1072 err = xa_insert(&devlink->ports, port_index, devlink_port, GFP_KERNEL); 1073 if (err) { 1074 devlink_port->registered = false; 1075 return err; 1076 } 1077 1078 INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn); 1079 devlink_port_type_warn_schedule(devlink_port); 1080 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); 1081 return 0; 1082 } 1083 EXPORT_SYMBOL_GPL(devl_port_register_with_ops); 1084 1085 /** 1086 * devlink_port_register_with_ops - Register devlink port 1087 * 1088 * @devlink: devlink 1089 * @devlink_port: devlink port 1090 * @port_index: driver-specific numerical identifier of the port 1091 * @ops: port ops 1092 * 1093 * Register devlink port with provided port index. User can use 1094 * any indexing, even hw-related one. devlink_port structure 1095 * is convenient to be embedded inside user driver private structure. 1096 * Note that the caller should take care of zeroing the devlink_port 1097 * structure. 1098 * 1099 * Context: Takes and release devlink->lock <mutex>. 1100 */ 1101 int devlink_port_register_with_ops(struct devlink *devlink, 1102 struct devlink_port *devlink_port, 1103 unsigned int port_index, 1104 const struct devlink_port_ops *ops) 1105 { 1106 int err; 1107 1108 devl_lock(devlink); 1109 err = devl_port_register_with_ops(devlink, devlink_port, 1110 port_index, ops); 1111 devl_unlock(devlink); 1112 return err; 1113 } 1114 EXPORT_SYMBOL_GPL(devlink_port_register_with_ops); 1115 1116 /** 1117 * devl_port_unregister() - Unregister devlink port 1118 * 1119 * @devlink_port: devlink port 1120 */ 1121 void devl_port_unregister(struct devlink_port *devlink_port) 1122 { 1123 lockdep_assert_held(&devlink_port->devlink->lock); 1124 WARN_ON(devlink_port->type != DEVLINK_PORT_TYPE_NOTSET); 1125 1126 devlink_port_type_warn_cancel(devlink_port); 1127 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL); 1128 xa_erase(&devlink_port->devlink->ports, devlink_port->index); 1129 WARN_ON(!list_empty(&devlink_port->reporter_list)); 1130 devlink_port->registered = false; 1131 } 1132 EXPORT_SYMBOL_GPL(devl_port_unregister); 1133 1134 /** 1135 * devlink_port_unregister - Unregister devlink port 1136 * 1137 * @devlink_port: devlink port 1138 * 1139 * Context: Takes and release devlink->lock <mutex>. 1140 */ 1141 void devlink_port_unregister(struct devlink_port *devlink_port) 1142 { 1143 struct devlink *devlink = devlink_port->devlink; 1144 1145 devl_lock(devlink); 1146 devl_port_unregister(devlink_port); 1147 devl_unlock(devlink); 1148 } 1149 EXPORT_SYMBOL_GPL(devlink_port_unregister); 1150 1151 static void devlink_port_type_netdev_checks(struct devlink_port *devlink_port, 1152 struct net_device *netdev) 1153 { 1154 const struct net_device_ops *ops = netdev->netdev_ops; 1155 1156 /* If driver registers devlink port, it should set devlink port 1157 * attributes accordingly so the compat functions are called 1158 * and the original ops are not used. 1159 */ 1160 if (ops->ndo_get_phys_port_name) { 1161 /* Some drivers use the same set of ndos for netdevs 1162 * that have devlink_port registered and also for 1163 * those who don't. Make sure that ndo_get_phys_port_name 1164 * returns -EOPNOTSUPP here in case it is defined. 1165 * Warn if not. 1166 */ 1167 char name[IFNAMSIZ]; 1168 int err; 1169 1170 err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name)); 1171 WARN_ON(err != -EOPNOTSUPP); 1172 } 1173 if (ops->ndo_get_port_parent_id) { 1174 /* Some drivers use the same set of ndos for netdevs 1175 * that have devlink_port registered and also for 1176 * those who don't. Make sure that ndo_get_port_parent_id 1177 * returns -EOPNOTSUPP here in case it is defined. 1178 * Warn if not. 1179 */ 1180 struct netdev_phys_item_id ppid; 1181 int err; 1182 1183 err = ops->ndo_get_port_parent_id(netdev, &ppid); 1184 WARN_ON(err != -EOPNOTSUPP); 1185 } 1186 } 1187 1188 static void __devlink_port_type_set(struct devlink_port *devlink_port, 1189 enum devlink_port_type type, 1190 void *type_dev) 1191 { 1192 struct net_device *netdev = type_dev; 1193 1194 ASSERT_DEVLINK_PORT_REGISTERED(devlink_port); 1195 1196 if (type == DEVLINK_PORT_TYPE_NOTSET) { 1197 devlink_port_type_warn_schedule(devlink_port); 1198 } else { 1199 devlink_port_type_warn_cancel(devlink_port); 1200 if (type == DEVLINK_PORT_TYPE_ETH && netdev) 1201 devlink_port_type_netdev_checks(devlink_port, netdev); 1202 } 1203 1204 spin_lock_bh(&devlink_port->type_lock); 1205 devlink_port->type = type; 1206 switch (type) { 1207 case DEVLINK_PORT_TYPE_ETH: 1208 devlink_port->type_eth.netdev = netdev; 1209 if (netdev) { 1210 ASSERT_RTNL(); 1211 devlink_port->type_eth.ifindex = netdev->ifindex; 1212 BUILD_BUG_ON(sizeof(devlink_port->type_eth.ifname) != 1213 sizeof(netdev->name)); 1214 strcpy(devlink_port->type_eth.ifname, netdev->name); 1215 } 1216 break; 1217 case DEVLINK_PORT_TYPE_IB: 1218 devlink_port->type_ib.ibdev = type_dev; 1219 break; 1220 default: 1221 break; 1222 } 1223 spin_unlock_bh(&devlink_port->type_lock); 1224 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); 1225 } 1226 1227 /** 1228 * devlink_port_type_eth_set - Set port type to Ethernet 1229 * 1230 * @devlink_port: devlink port 1231 * 1232 * If driver is calling this, most likely it is doing something wrong. 1233 */ 1234 void devlink_port_type_eth_set(struct devlink_port *devlink_port) 1235 { 1236 devl_warn(devlink_port->devlink, 1237 "devlink port type for port %d set to Ethernet without a software interface reference, device type not supported by the kernel?\n", 1238 devlink_port->index); 1239 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, NULL); 1240 } 1241 EXPORT_SYMBOL_GPL(devlink_port_type_eth_set); 1242 1243 /** 1244 * devlink_port_type_ib_set - Set port type to InfiniBand 1245 * 1246 * @devlink_port: devlink port 1247 * @ibdev: related IB device 1248 */ 1249 void devlink_port_type_ib_set(struct devlink_port *devlink_port, 1250 struct ib_device *ibdev) 1251 { 1252 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev); 1253 } 1254 EXPORT_SYMBOL_GPL(devlink_port_type_ib_set); 1255 1256 /** 1257 * devlink_port_type_clear - Clear port type 1258 * 1259 * @devlink_port: devlink port 1260 * 1261 * If driver is calling this for clearing Ethernet type, most likely 1262 * it is doing something wrong. 1263 */ 1264 void devlink_port_type_clear(struct devlink_port *devlink_port) 1265 { 1266 if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) 1267 devl_warn(devlink_port->devlink, 1268 "devlink port type for port %d cleared without a software interface reference, device type not supported by the kernel?\n", 1269 devlink_port->index); 1270 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL); 1271 } 1272 EXPORT_SYMBOL_GPL(devlink_port_type_clear); 1273 1274 int devlink_port_netdevice_event(struct notifier_block *nb, 1275 unsigned long event, void *ptr) 1276 { 1277 struct net_device *netdev = netdev_notifier_info_to_dev(ptr); 1278 struct devlink_port *devlink_port = netdev->devlink_port; 1279 struct devlink *devlink; 1280 1281 if (!devlink_port) 1282 return NOTIFY_OK; 1283 devlink = devlink_port->devlink; 1284 1285 switch (event) { 1286 case NETDEV_POST_INIT: 1287 /* Set the type but not netdev pointer. It is going to be set 1288 * later on by NETDEV_REGISTER event. Happens once during 1289 * netdevice register 1290 */ 1291 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, 1292 NULL); 1293 break; 1294 case NETDEV_REGISTER: 1295 case NETDEV_CHANGENAME: 1296 if (devlink_net(devlink) != dev_net(netdev)) 1297 return NOTIFY_OK; 1298 /* Set the netdev on top of previously set type. Note this 1299 * event happens also during net namespace change so here 1300 * we take into account netdev pointer appearing in this 1301 * namespace. 1302 */ 1303 __devlink_port_type_set(devlink_port, devlink_port->type, 1304 netdev); 1305 break; 1306 case NETDEV_UNREGISTER: 1307 if (devlink_net(devlink) != dev_net(netdev)) 1308 return NOTIFY_OK; 1309 /* Clear netdev pointer, but not the type. This event happens 1310 * also during net namespace change so we need to clear 1311 * pointer to netdev that is going to another net namespace. 1312 */ 1313 __devlink_port_type_set(devlink_port, devlink_port->type, 1314 NULL); 1315 break; 1316 case NETDEV_PRE_UNINIT: 1317 /* Clear the type and the netdev pointer. Happens one during 1318 * netdevice unregister. 1319 */ 1320 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, 1321 NULL); 1322 break; 1323 } 1324 1325 return NOTIFY_OK; 1326 } 1327 1328 static void __devlink_port_attrs_set(struct devlink_port *devlink_port, 1329 enum devlink_port_flavour flavour) 1330 { 1331 struct devlink_port_attrs *attrs = &devlink_port->attrs; 1332 1333 devlink_port->attrs_set = true; 1334 attrs->flavour = flavour; 1335 if (attrs->switch_id.id_len) { 1336 devlink_port->switch_port = true; 1337 if (WARN_ON(attrs->switch_id.id_len > MAX_PHYS_ITEM_ID_LEN)) 1338 attrs->switch_id.id_len = MAX_PHYS_ITEM_ID_LEN; 1339 } else { 1340 devlink_port->switch_port = false; 1341 } 1342 } 1343 1344 /** 1345 * devlink_port_attrs_set - Set port attributes 1346 * 1347 * @devlink_port: devlink port 1348 * @attrs: devlink port attrs 1349 */ 1350 void devlink_port_attrs_set(struct devlink_port *devlink_port, 1351 const struct devlink_port_attrs *attrs) 1352 { 1353 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); 1354 WARN_ON(attrs->splittable && attrs->split); 1355 1356 devlink_port->attrs = *attrs; 1357 __devlink_port_attrs_set(devlink_port, attrs->flavour); 1358 } 1359 EXPORT_SYMBOL_GPL(devlink_port_attrs_set); 1360 1361 /** 1362 * devlink_port_attrs_pci_pf_set - Set PCI PF port attributes 1363 * 1364 * @devlink_port: devlink port 1365 * @controller: associated controller number for the devlink port instance 1366 * @pf: associated PCI function number for the devlink port instance 1367 * @external: indicates if the port is for an external controller 1368 */ 1369 void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port, u32 controller, 1370 u16 pf, bool external) 1371 { 1372 struct devlink_port_attrs *attrs = &devlink_port->attrs; 1373 1374 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); 1375 1376 __devlink_port_attrs_set(devlink_port, DEVLINK_PORT_FLAVOUR_PCI_PF); 1377 attrs->pci_pf.controller = controller; 1378 attrs->pci_pf.pf = pf; 1379 attrs->pci_pf.external = external; 1380 } 1381 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set); 1382 1383 /** 1384 * devlink_port_attrs_pci_vf_set - Set PCI VF port attributes 1385 * 1386 * @devlink_port: devlink port 1387 * @controller: associated controller number for the devlink port instance 1388 * @pf: associated PCI function number for the devlink port instance 1389 * @vf: associated PCI VF number of a PF for the devlink port instance; 1390 * VF number starts from 0 for the first PCI virtual function 1391 * @external: indicates if the port is for an external controller 1392 */ 1393 void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port, u32 controller, 1394 u16 pf, u16 vf, bool external) 1395 { 1396 struct devlink_port_attrs *attrs = &devlink_port->attrs; 1397 1398 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); 1399 1400 __devlink_port_attrs_set(devlink_port, DEVLINK_PORT_FLAVOUR_PCI_VF); 1401 attrs->pci_vf.controller = controller; 1402 attrs->pci_vf.pf = pf; 1403 attrs->pci_vf.vf = vf; 1404 attrs->pci_vf.external = external; 1405 } 1406 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set); 1407 1408 /** 1409 * devlink_port_attrs_pci_sf_set - Set PCI SF port attributes 1410 * 1411 * @devlink_port: devlink port 1412 * @controller: associated controller number for the devlink port instance 1413 * @pf: associated PCI function number for the devlink port instance 1414 * @sf: associated SF number of a PF for the devlink port instance 1415 * @external: indicates if the port is for an external controller 1416 */ 1417 void devlink_port_attrs_pci_sf_set(struct devlink_port *devlink_port, u32 controller, 1418 u16 pf, u32 sf, bool external) 1419 { 1420 struct devlink_port_attrs *attrs = &devlink_port->attrs; 1421 1422 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); 1423 1424 __devlink_port_attrs_set(devlink_port, DEVLINK_PORT_FLAVOUR_PCI_SF); 1425 attrs->pci_sf.controller = controller; 1426 attrs->pci_sf.pf = pf; 1427 attrs->pci_sf.sf = sf; 1428 attrs->pci_sf.external = external; 1429 } 1430 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_sf_set); 1431 1432 static void devlink_port_rel_notify_cb(struct devlink *devlink, u32 port_index) 1433 { 1434 struct devlink_port *devlink_port; 1435 1436 devlink_port = devlink_port_get_by_index(devlink, port_index); 1437 if (!devlink_port) 1438 return; 1439 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); 1440 } 1441 1442 static void devlink_port_rel_cleanup_cb(struct devlink *devlink, u32 port_index, 1443 u32 rel_index) 1444 { 1445 struct devlink_port *devlink_port; 1446 1447 devlink_port = devlink_port_get_by_index(devlink, port_index); 1448 if (devlink_port && devlink_port->rel_index == rel_index) 1449 devlink_port->rel_index = 0; 1450 } 1451 1452 /** 1453 * devl_port_fn_devlink_set - Attach peer devlink 1454 * instance to port function. 1455 * @devlink_port: devlink port 1456 * @fn_devlink: devlink instance to attach 1457 */ 1458 int devl_port_fn_devlink_set(struct devlink_port *devlink_port, 1459 struct devlink *fn_devlink) 1460 { 1461 ASSERT_DEVLINK_PORT_REGISTERED(devlink_port); 1462 1463 if (WARN_ON(devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_SF || 1464 devlink_port->attrs.pci_sf.external)) 1465 return -EINVAL; 1466 1467 return devlink_rel_nested_in_add(&devlink_port->rel_index, 1468 devlink_port->devlink->index, 1469 devlink_port->index, 1470 devlink_port_rel_notify_cb, 1471 devlink_port_rel_cleanup_cb, 1472 fn_devlink); 1473 } 1474 EXPORT_SYMBOL_GPL(devl_port_fn_devlink_set); 1475 1476 /** 1477 * devlink_port_linecard_set - Link port with a linecard 1478 * 1479 * @devlink_port: devlink port 1480 * @linecard: devlink linecard 1481 */ 1482 void devlink_port_linecard_set(struct devlink_port *devlink_port, 1483 struct devlink_linecard *linecard) 1484 { 1485 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); 1486 1487 devlink_port->linecard = linecard; 1488 } 1489 EXPORT_SYMBOL_GPL(devlink_port_linecard_set); 1490 1491 static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port, 1492 char *name, size_t len) 1493 { 1494 struct devlink_port_attrs *attrs = &devlink_port->attrs; 1495 int n = 0; 1496 1497 if (!devlink_port->attrs_set || devlink_port->attrs.no_phys_port_name) 1498 return -EOPNOTSUPP; 1499 1500 switch (attrs->flavour) { 1501 case DEVLINK_PORT_FLAVOUR_PHYSICAL: 1502 if (devlink_port->linecard) 1503 n = snprintf(name, len, "l%u", 1504 devlink_linecard_index(devlink_port->linecard)); 1505 if (n < len) 1506 n += snprintf(name + n, len - n, "p%u", 1507 attrs->phys.port_number); 1508 if (n < len && attrs->split) 1509 n += snprintf(name + n, len - n, "s%u", 1510 attrs->phys.split_subport_number); 1511 break; 1512 case DEVLINK_PORT_FLAVOUR_CPU: 1513 case DEVLINK_PORT_FLAVOUR_DSA: 1514 case DEVLINK_PORT_FLAVOUR_UNUSED: 1515 /* As CPU and DSA ports do not have a netdevice associated 1516 * case should not ever happen. 1517 */ 1518 WARN_ON(1); 1519 return -EINVAL; 1520 case DEVLINK_PORT_FLAVOUR_PCI_PF: 1521 if (attrs->pci_pf.external || attrs->pci_pf.controller) { 1522 n = snprintf(name, len, "c%u", attrs->pci_pf.controller); 1523 if (n >= len) 1524 return -EINVAL; 1525 len -= n; 1526 name += n; 1527 } 1528 n = snprintf(name, len, "pf%u", attrs->pci_pf.pf); 1529 break; 1530 case DEVLINK_PORT_FLAVOUR_PCI_VF: 1531 if (attrs->pci_vf.external || attrs->pci_vf.controller) { 1532 n = snprintf(name, len, "c%u", attrs->pci_vf.controller); 1533 if (n >= len) 1534 return -EINVAL; 1535 len -= n; 1536 name += n; 1537 } 1538 n = snprintf(name, len, "pf%uvf%u", 1539 attrs->pci_vf.pf, attrs->pci_vf.vf); 1540 break; 1541 case DEVLINK_PORT_FLAVOUR_PCI_SF: 1542 if (attrs->pci_sf.external || attrs->pci_sf.controller) { 1543 n = snprintf(name, len, "c%u", attrs->pci_sf.controller); 1544 if (n >= len) 1545 return -EINVAL; 1546 len -= n; 1547 name += n; 1548 } 1549 n = snprintf(name, len, "pf%usf%u", attrs->pci_sf.pf, 1550 attrs->pci_sf.sf); 1551 break; 1552 case DEVLINK_PORT_FLAVOUR_VIRTUAL: 1553 return -EOPNOTSUPP; 1554 } 1555 1556 if (n >= len) 1557 return -EINVAL; 1558 1559 return 0; 1560 } 1561 1562 int devlink_compat_phys_port_name_get(struct net_device *dev, 1563 char *name, size_t len) 1564 { 1565 struct devlink_port *devlink_port; 1566 1567 /* RTNL mutex is held here which ensures that devlink_port 1568 * instance cannot disappear in the middle. No need to take 1569 * any devlink lock as only permanent values are accessed. 1570 */ 1571 ASSERT_RTNL(); 1572 1573 devlink_port = dev->devlink_port; 1574 if (!devlink_port) 1575 return -EOPNOTSUPP; 1576 1577 return __devlink_port_phys_port_name_get(devlink_port, name, len); 1578 } 1579 1580 int devlink_compat_switch_id_get(struct net_device *dev, 1581 struct netdev_phys_item_id *ppid) 1582 { 1583 struct devlink_port *devlink_port; 1584 1585 /* Caller must hold RTNL mutex or reference to dev, which ensures that 1586 * devlink_port instance cannot disappear in the middle. No need to take 1587 * any devlink lock as only permanent values are accessed. 1588 */ 1589 devlink_port = dev->devlink_port; 1590 if (!devlink_port || !devlink_port->switch_port) 1591 return -EOPNOTSUPP; 1592 1593 memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid)); 1594 1595 return 0; 1596 } 1597