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 DEVLINK_PORT_FN_CAPS_VALID_MASK \ 10 (_BITUL(__DEVLINK_PORT_FN_ATTR_CAPS_MAX) - 1) 11 12 static const struct nla_policy devlink_function_nl_policy[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1] = { 13 [DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] = { .type = NLA_BINARY }, 14 [DEVLINK_PORT_FN_ATTR_STATE] = 15 NLA_POLICY_RANGE(NLA_U8, DEVLINK_PORT_FN_STATE_INACTIVE, 16 DEVLINK_PORT_FN_STATE_ACTIVE), 17 [DEVLINK_PORT_FN_ATTR_CAPS] = 18 NLA_POLICY_BITFIELD32(DEVLINK_PORT_FN_CAPS_VALID_MASK), 19 }; 20 21 #define ASSERT_DEVLINK_PORT_REGISTERED(devlink_port) \ 22 WARN_ON_ONCE(!(devlink_port)->registered) 23 #define ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port) \ 24 WARN_ON_ONCE((devlink_port)->registered) 25 26 struct devlink_port *devlink_port_get_by_index(struct devlink *devlink, 27 unsigned int port_index) 28 { 29 return xa_load(&devlink->ports, port_index); 30 } 31 32 struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink, 33 struct nlattr **attrs) 34 { 35 if (attrs[DEVLINK_ATTR_PORT_INDEX]) { 36 u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]); 37 struct devlink_port *devlink_port; 38 39 devlink_port = devlink_port_get_by_index(devlink, port_index); 40 if (!devlink_port) 41 return ERR_PTR(-ENODEV); 42 return devlink_port; 43 } 44 return ERR_PTR(-EINVAL); 45 } 46 47 struct devlink_port *devlink_port_get_from_info(struct devlink *devlink, 48 struct genl_info *info) 49 { 50 return devlink_port_get_from_attrs(devlink, info->attrs); 51 } 52 53 static void devlink_port_fn_cap_fill(struct nla_bitfield32 *caps, 54 u32 cap, bool is_enable) 55 { 56 caps->selector |= cap; 57 if (is_enable) 58 caps->value |= cap; 59 } 60 61 static int devlink_port_fn_roce_fill(struct devlink_port *devlink_port, 62 struct nla_bitfield32 *caps, 63 struct netlink_ext_ack *extack) 64 { 65 bool is_enable; 66 int err; 67 68 if (!devlink_port->ops->port_fn_roce_get) 69 return 0; 70 71 err = devlink_port->ops->port_fn_roce_get(devlink_port, &is_enable, 72 extack); 73 if (err) { 74 if (err == -EOPNOTSUPP) 75 return 0; 76 return err; 77 } 78 79 devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_ROCE, is_enable); 80 return 0; 81 } 82 83 static int devlink_port_fn_migratable_fill(struct devlink_port *devlink_port, 84 struct nla_bitfield32 *caps, 85 struct netlink_ext_ack *extack) 86 { 87 bool is_enable; 88 int err; 89 90 if (!devlink_port->ops->port_fn_migratable_get || 91 devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) 92 return 0; 93 94 err = devlink_port->ops->port_fn_migratable_get(devlink_port, 95 &is_enable, extack); 96 if (err) { 97 if (err == -EOPNOTSUPP) 98 return 0; 99 return err; 100 } 101 102 devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_MIGRATABLE, is_enable); 103 return 0; 104 } 105 106 static int devlink_port_fn_ipsec_crypto_fill(struct devlink_port *devlink_port, 107 struct nla_bitfield32 *caps, 108 struct netlink_ext_ack *extack) 109 { 110 bool is_enable; 111 int err; 112 113 if (!devlink_port->ops->port_fn_ipsec_crypto_get || 114 devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) 115 return 0; 116 117 err = devlink_port->ops->port_fn_ipsec_crypto_get(devlink_port, &is_enable, extack); 118 if (err) { 119 if (err == -EOPNOTSUPP) 120 return 0; 121 return err; 122 } 123 124 devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO, is_enable); 125 return 0; 126 } 127 128 static int devlink_port_fn_ipsec_packet_fill(struct devlink_port *devlink_port, 129 struct nla_bitfield32 *caps, 130 struct netlink_ext_ack *extack) 131 { 132 bool is_enable; 133 int err; 134 135 if (!devlink_port->ops->port_fn_ipsec_packet_get || 136 devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) 137 return 0; 138 139 err = devlink_port->ops->port_fn_ipsec_packet_get(devlink_port, &is_enable, extack); 140 if (err) { 141 if (err == -EOPNOTSUPP) 142 return 0; 143 return err; 144 } 145 146 devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_IPSEC_PACKET, is_enable); 147 return 0; 148 } 149 150 static int devlink_port_fn_caps_fill(struct devlink_port *devlink_port, 151 struct sk_buff *msg, 152 struct netlink_ext_ack *extack, 153 bool *msg_updated) 154 { 155 struct nla_bitfield32 caps = {}; 156 int err; 157 158 err = devlink_port_fn_roce_fill(devlink_port, &caps, extack); 159 if (err) 160 return err; 161 162 err = devlink_port_fn_migratable_fill(devlink_port, &caps, extack); 163 if (err) 164 return err; 165 166 err = devlink_port_fn_ipsec_crypto_fill(devlink_port, &caps, extack); 167 if (err) 168 return err; 169 170 err = devlink_port_fn_ipsec_packet_fill(devlink_port, &caps, extack); 171 if (err) 172 return err; 173 174 if (!caps.selector) 175 return 0; 176 err = nla_put_bitfield32(msg, DEVLINK_PORT_FN_ATTR_CAPS, caps.value, 177 caps.selector); 178 if (err) 179 return err; 180 181 *msg_updated = true; 182 return 0; 183 } 184 185 int devlink_nl_port_handle_fill(struct sk_buff *msg, struct devlink_port *devlink_port) 186 { 187 if (devlink_nl_put_handle(msg, devlink_port->devlink)) 188 return -EMSGSIZE; 189 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index)) 190 return -EMSGSIZE; 191 return 0; 192 } 193 194 size_t devlink_nl_port_handle_size(struct devlink_port *devlink_port) 195 { 196 struct devlink *devlink = devlink_port->devlink; 197 198 return nla_total_size(strlen(devlink->dev->bus->name) + 1) /* DEVLINK_ATTR_BUS_NAME */ 199 + nla_total_size(strlen(dev_name(devlink->dev)) + 1) /* DEVLINK_ATTR_DEV_NAME */ 200 + nla_total_size(4); /* DEVLINK_ATTR_PORT_INDEX */ 201 } 202 203 static int devlink_nl_port_attrs_put(struct sk_buff *msg, 204 struct devlink_port *devlink_port) 205 { 206 struct devlink_port_attrs *attrs = &devlink_port->attrs; 207 208 if (!devlink_port->attrs_set) 209 return 0; 210 if (attrs->lanes) { 211 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_LANES, attrs->lanes)) 212 return -EMSGSIZE; 213 } 214 if (nla_put_u8(msg, DEVLINK_ATTR_PORT_SPLITTABLE, attrs->splittable)) 215 return -EMSGSIZE; 216 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_FLAVOUR, attrs->flavour)) 217 return -EMSGSIZE; 218 switch (devlink_port->attrs.flavour) { 219 case DEVLINK_PORT_FLAVOUR_PCI_PF: 220 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER, 221 attrs->pci_pf.controller) || 222 nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_pf.pf)) 223 return -EMSGSIZE; 224 if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_pf.external)) 225 return -EMSGSIZE; 226 break; 227 case DEVLINK_PORT_FLAVOUR_PCI_VF: 228 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER, 229 attrs->pci_vf.controller) || 230 nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_vf.pf) || 231 nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_VF_NUMBER, attrs->pci_vf.vf)) 232 return -EMSGSIZE; 233 if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_vf.external)) 234 return -EMSGSIZE; 235 break; 236 case DEVLINK_PORT_FLAVOUR_PCI_SF: 237 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER, 238 attrs->pci_sf.controller) || 239 nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, 240 attrs->pci_sf.pf) || 241 nla_put_u32(msg, DEVLINK_ATTR_PORT_PCI_SF_NUMBER, 242 attrs->pci_sf.sf)) 243 return -EMSGSIZE; 244 break; 245 case DEVLINK_PORT_FLAVOUR_PHYSICAL: 246 case DEVLINK_PORT_FLAVOUR_CPU: 247 case DEVLINK_PORT_FLAVOUR_DSA: 248 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER, 249 attrs->phys.port_number)) 250 return -EMSGSIZE; 251 if (!attrs->split) 252 return 0; 253 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP, 254 attrs->phys.port_number)) 255 return -EMSGSIZE; 256 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER, 257 attrs->phys.split_subport_number)) 258 return -EMSGSIZE; 259 break; 260 default: 261 break; 262 } 263 return 0; 264 } 265 266 static int devlink_port_fn_hw_addr_fill(struct devlink_port *port, 267 struct sk_buff *msg, 268 struct netlink_ext_ack *extack, 269 bool *msg_updated) 270 { 271 u8 hw_addr[MAX_ADDR_LEN]; 272 int hw_addr_len; 273 int err; 274 275 if (!port->ops->port_fn_hw_addr_get) 276 return 0; 277 278 err = port->ops->port_fn_hw_addr_get(port, hw_addr, &hw_addr_len, 279 extack); 280 if (err) { 281 if (err == -EOPNOTSUPP) 282 return 0; 283 return err; 284 } 285 err = nla_put(msg, DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR, hw_addr_len, hw_addr); 286 if (err) 287 return err; 288 *msg_updated = true; 289 return 0; 290 } 291 292 static bool 293 devlink_port_fn_state_valid(enum devlink_port_fn_state state) 294 { 295 return state == DEVLINK_PORT_FN_STATE_INACTIVE || 296 state == DEVLINK_PORT_FN_STATE_ACTIVE; 297 } 298 299 static bool 300 devlink_port_fn_opstate_valid(enum devlink_port_fn_opstate opstate) 301 { 302 return opstate == DEVLINK_PORT_FN_OPSTATE_DETACHED || 303 opstate == DEVLINK_PORT_FN_OPSTATE_ATTACHED; 304 } 305 306 static int devlink_port_fn_state_fill(struct devlink_port *port, 307 struct sk_buff *msg, 308 struct netlink_ext_ack *extack, 309 bool *msg_updated) 310 { 311 enum devlink_port_fn_opstate opstate; 312 enum devlink_port_fn_state state; 313 int err; 314 315 if (!port->ops->port_fn_state_get) 316 return 0; 317 318 err = port->ops->port_fn_state_get(port, &state, &opstate, extack); 319 if (err) { 320 if (err == -EOPNOTSUPP) 321 return 0; 322 return err; 323 } 324 if (!devlink_port_fn_state_valid(state)) { 325 WARN_ON_ONCE(1); 326 NL_SET_ERR_MSG(extack, "Invalid state read from driver"); 327 return -EINVAL; 328 } 329 if (!devlink_port_fn_opstate_valid(opstate)) { 330 WARN_ON_ONCE(1); 331 NL_SET_ERR_MSG(extack, "Invalid operational state read from driver"); 332 return -EINVAL; 333 } 334 if (nla_put_u8(msg, DEVLINK_PORT_FN_ATTR_STATE, state) || 335 nla_put_u8(msg, DEVLINK_PORT_FN_ATTR_OPSTATE, opstate)) 336 return -EMSGSIZE; 337 *msg_updated = true; 338 return 0; 339 } 340 341 static int 342 devlink_port_fn_mig_set(struct devlink_port *devlink_port, bool enable, 343 struct netlink_ext_ack *extack) 344 { 345 return devlink_port->ops->port_fn_migratable_set(devlink_port, enable, 346 extack); 347 } 348 349 static int 350 devlink_port_fn_roce_set(struct devlink_port *devlink_port, bool enable, 351 struct netlink_ext_ack *extack) 352 { 353 return devlink_port->ops->port_fn_roce_set(devlink_port, enable, 354 extack); 355 } 356 357 static int 358 devlink_port_fn_ipsec_crypto_set(struct devlink_port *devlink_port, bool enable, 359 struct netlink_ext_ack *extack) 360 { 361 return devlink_port->ops->port_fn_ipsec_crypto_set(devlink_port, enable, extack); 362 } 363 364 static int 365 devlink_port_fn_ipsec_packet_set(struct devlink_port *devlink_port, bool enable, 366 struct netlink_ext_ack *extack) 367 { 368 return devlink_port->ops->port_fn_ipsec_packet_set(devlink_port, enable, extack); 369 } 370 371 static int devlink_port_fn_caps_set(struct devlink_port *devlink_port, 372 const struct nlattr *attr, 373 struct netlink_ext_ack *extack) 374 { 375 struct nla_bitfield32 caps; 376 u32 caps_value; 377 int err; 378 379 caps = nla_get_bitfield32(attr); 380 caps_value = caps.value & caps.selector; 381 if (caps.selector & DEVLINK_PORT_FN_CAP_ROCE) { 382 err = devlink_port_fn_roce_set(devlink_port, 383 caps_value & DEVLINK_PORT_FN_CAP_ROCE, 384 extack); 385 if (err) 386 return err; 387 } 388 if (caps.selector & DEVLINK_PORT_FN_CAP_MIGRATABLE) { 389 err = devlink_port_fn_mig_set(devlink_port, caps_value & 390 DEVLINK_PORT_FN_CAP_MIGRATABLE, 391 extack); 392 if (err) 393 return err; 394 } 395 if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO) { 396 err = devlink_port_fn_ipsec_crypto_set(devlink_port, caps_value & 397 DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO, 398 extack); 399 if (err) 400 return err; 401 } 402 if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_PACKET) { 403 err = devlink_port_fn_ipsec_packet_set(devlink_port, caps_value & 404 DEVLINK_PORT_FN_CAP_IPSEC_PACKET, 405 extack); 406 if (err) 407 return err; 408 } 409 return 0; 410 } 411 412 static int 413 devlink_nl_port_function_attrs_put(struct sk_buff *msg, struct devlink_port *port, 414 struct netlink_ext_ack *extack) 415 { 416 struct nlattr *function_attr; 417 bool msg_updated = false; 418 int err; 419 420 function_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PORT_FUNCTION); 421 if (!function_attr) 422 return -EMSGSIZE; 423 424 err = devlink_port_fn_hw_addr_fill(port, msg, extack, &msg_updated); 425 if (err) 426 goto out; 427 err = devlink_port_fn_caps_fill(port, msg, extack, &msg_updated); 428 if (err) 429 goto out; 430 err = devlink_port_fn_state_fill(port, msg, extack, &msg_updated); 431 if (err) 432 goto out; 433 err = devlink_rel_devlink_handle_put(msg, port->devlink, 434 port->rel_index, 435 DEVLINK_PORT_FN_ATTR_DEVLINK, 436 &msg_updated); 437 438 out: 439 if (err || !msg_updated) 440 nla_nest_cancel(msg, function_attr); 441 else 442 nla_nest_end(msg, function_attr); 443 return err; 444 } 445 446 static int devlink_nl_port_fill(struct sk_buff *msg, 447 struct devlink_port *devlink_port, 448 enum devlink_command cmd, u32 portid, u32 seq, 449 int flags, struct netlink_ext_ack *extack) 450 { 451 struct devlink *devlink = devlink_port->devlink; 452 void *hdr; 453 454 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); 455 if (!hdr) 456 return -EMSGSIZE; 457 458 if (devlink_nl_put_handle(msg, devlink)) 459 goto nla_put_failure; 460 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index)) 461 goto nla_put_failure; 462 463 spin_lock_bh(&devlink_port->type_lock); 464 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type)) 465 goto nla_put_failure_type_locked; 466 if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET && 467 nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE, 468 devlink_port->desired_type)) 469 goto nla_put_failure_type_locked; 470 if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) { 471 if (devlink_port->type_eth.netdev && 472 (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX, 473 devlink_port->type_eth.ifindex) || 474 nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME, 475 devlink_port->type_eth.ifname))) 476 goto nla_put_failure_type_locked; 477 } 478 if (devlink_port->type == DEVLINK_PORT_TYPE_IB) { 479 struct ib_device *ibdev = devlink_port->type_ib.ibdev; 480 481 if (ibdev && 482 nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME, 483 ibdev->name)) 484 goto nla_put_failure_type_locked; 485 } 486 spin_unlock_bh(&devlink_port->type_lock); 487 if (devlink_nl_port_attrs_put(msg, devlink_port)) 488 goto nla_put_failure; 489 if (devlink_nl_port_function_attrs_put(msg, devlink_port, extack)) 490 goto nla_put_failure; 491 if (devlink_port->linecard && 492 nla_put_u32(msg, DEVLINK_ATTR_LINECARD_INDEX, 493 devlink_linecard_index(devlink_port->linecard))) 494 goto nla_put_failure; 495 496 genlmsg_end(msg, hdr); 497 return 0; 498 499 nla_put_failure_type_locked: 500 spin_unlock_bh(&devlink_port->type_lock); 501 nla_put_failure: 502 genlmsg_cancel(msg, hdr); 503 return -EMSGSIZE; 504 } 505 506 static void devlink_port_notify(struct devlink_port *devlink_port, 507 enum devlink_command cmd) 508 { 509 struct devlink *devlink = devlink_port->devlink; 510 struct sk_buff *msg; 511 int err; 512 513 WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL); 514 515 if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED)) 516 return; 517 518 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 519 if (!msg) 520 return; 521 522 err = devlink_nl_port_fill(msg, devlink_port, cmd, 0, 0, 0, NULL); 523 if (err) { 524 nlmsg_free(msg); 525 return; 526 } 527 528 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), msg, 529 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); 530 } 531 532 static void devlink_ports_notify(struct devlink *devlink, 533 enum devlink_command cmd) 534 { 535 struct devlink_port *devlink_port; 536 unsigned long port_index; 537 538 xa_for_each(&devlink->ports, port_index, devlink_port) 539 devlink_port_notify(devlink_port, cmd); 540 } 541 542 void devlink_ports_notify_register(struct devlink *devlink) 543 { 544 devlink_ports_notify(devlink, DEVLINK_CMD_PORT_NEW); 545 } 546 547 void devlink_ports_notify_unregister(struct devlink *devlink) 548 { 549 devlink_ports_notify(devlink, DEVLINK_CMD_PORT_DEL); 550 } 551 552 int devlink_nl_port_get_doit(struct sk_buff *skb, struct genl_info *info) 553 { 554 struct devlink_port *devlink_port = info->user_ptr[1]; 555 struct sk_buff *msg; 556 int err; 557 558 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 559 if (!msg) 560 return -ENOMEM; 561 562 err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_PORT_NEW, 563 info->snd_portid, info->snd_seq, 0, 564 info->extack); 565 if (err) { 566 nlmsg_free(msg); 567 return err; 568 } 569 570 return genlmsg_reply(msg, info); 571 } 572 573 static int 574 devlink_nl_port_get_dump_one(struct sk_buff *msg, struct devlink *devlink, 575 struct netlink_callback *cb, int flags) 576 { 577 struct devlink_nl_dump_state *state = devlink_dump_state(cb); 578 struct devlink_port *devlink_port; 579 unsigned long port_index; 580 int err = 0; 581 582 xa_for_each_start(&devlink->ports, port_index, devlink_port, state->idx) { 583 err = devlink_nl_port_fill(msg, devlink_port, 584 DEVLINK_CMD_NEW, 585 NETLINK_CB(cb->skb).portid, 586 cb->nlh->nlmsg_seq, flags, 587 cb->extack); 588 if (err) { 589 state->idx = port_index; 590 break; 591 } 592 } 593 594 return err; 595 } 596 597 int devlink_nl_port_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb) 598 { 599 return devlink_nl_dumpit(skb, cb, devlink_nl_port_get_dump_one); 600 } 601 602 static int devlink_port_type_set(struct devlink_port *devlink_port, 603 enum devlink_port_type port_type) 604 605 { 606 int err; 607 608 if (!devlink_port->ops->port_type_set) 609 return -EOPNOTSUPP; 610 611 if (port_type == devlink_port->type) 612 return 0; 613 614 err = devlink_port->ops->port_type_set(devlink_port, port_type); 615 if (err) 616 return err; 617 618 devlink_port->desired_type = port_type; 619 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); 620 return 0; 621 } 622 623 static int devlink_port_function_hw_addr_set(struct devlink_port *port, 624 const struct nlattr *attr, 625 struct netlink_ext_ack *extack) 626 { 627 const u8 *hw_addr; 628 int hw_addr_len; 629 630 hw_addr = nla_data(attr); 631 hw_addr_len = nla_len(attr); 632 if (hw_addr_len > MAX_ADDR_LEN) { 633 NL_SET_ERR_MSG(extack, "Port function hardware address too long"); 634 return -EINVAL; 635 } 636 if (port->type == DEVLINK_PORT_TYPE_ETH) { 637 if (hw_addr_len != ETH_ALEN) { 638 NL_SET_ERR_MSG(extack, "Address must be 6 bytes for Ethernet device"); 639 return -EINVAL; 640 } 641 if (!is_unicast_ether_addr(hw_addr)) { 642 NL_SET_ERR_MSG(extack, "Non-unicast hardware address unsupported"); 643 return -EINVAL; 644 } 645 } 646 647 return port->ops->port_fn_hw_addr_set(port, hw_addr, hw_addr_len, 648 extack); 649 } 650 651 static int devlink_port_fn_state_set(struct devlink_port *port, 652 const struct nlattr *attr, 653 struct netlink_ext_ack *extack) 654 { 655 enum devlink_port_fn_state state; 656 657 state = nla_get_u8(attr); 658 return port->ops->port_fn_state_set(port, state, extack); 659 } 660 661 static int devlink_port_function_validate(struct devlink_port *devlink_port, 662 struct nlattr **tb, 663 struct netlink_ext_ack *extack) 664 { 665 const struct devlink_port_ops *ops = devlink_port->ops; 666 struct nlattr *attr; 667 668 if (tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] && 669 !ops->port_fn_hw_addr_set) { 670 NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR], 671 "Port doesn't support function attributes"); 672 return -EOPNOTSUPP; 673 } 674 if (tb[DEVLINK_PORT_FN_ATTR_STATE] && !ops->port_fn_state_set) { 675 NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR], 676 "Function does not support state setting"); 677 return -EOPNOTSUPP; 678 } 679 attr = tb[DEVLINK_PORT_FN_ATTR_CAPS]; 680 if (attr) { 681 struct nla_bitfield32 caps; 682 683 caps = nla_get_bitfield32(attr); 684 if (caps.selector & DEVLINK_PORT_FN_CAP_ROCE && 685 !ops->port_fn_roce_set) { 686 NL_SET_ERR_MSG_ATTR(extack, attr, 687 "Port doesn't support RoCE function attribute"); 688 return -EOPNOTSUPP; 689 } 690 if (caps.selector & DEVLINK_PORT_FN_CAP_MIGRATABLE) { 691 if (!ops->port_fn_migratable_set) { 692 NL_SET_ERR_MSG_ATTR(extack, attr, 693 "Port doesn't support migratable function attribute"); 694 return -EOPNOTSUPP; 695 } 696 if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) { 697 NL_SET_ERR_MSG_ATTR(extack, attr, 698 "migratable function attribute supported for VFs only"); 699 return -EOPNOTSUPP; 700 } 701 } 702 if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO) { 703 if (!ops->port_fn_ipsec_crypto_set) { 704 NL_SET_ERR_MSG_ATTR(extack, attr, 705 "Port doesn't support ipsec_crypto function attribute"); 706 return -EOPNOTSUPP; 707 } 708 if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) { 709 NL_SET_ERR_MSG_ATTR(extack, attr, 710 "ipsec_crypto function attribute supported for VFs only"); 711 return -EOPNOTSUPP; 712 } 713 } 714 if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_PACKET) { 715 if (!ops->port_fn_ipsec_packet_set) { 716 NL_SET_ERR_MSG_ATTR(extack, attr, 717 "Port doesn't support ipsec_packet function attribute"); 718 return -EOPNOTSUPP; 719 } 720 if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) { 721 NL_SET_ERR_MSG_ATTR(extack, attr, 722 "ipsec_packet function attribute supported for VFs only"); 723 return -EOPNOTSUPP; 724 } 725 } 726 } 727 return 0; 728 } 729 730 static int devlink_port_function_set(struct devlink_port *port, 731 const struct nlattr *attr, 732 struct netlink_ext_ack *extack) 733 { 734 struct nlattr *tb[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1]; 735 int err; 736 737 err = nla_parse_nested(tb, DEVLINK_PORT_FUNCTION_ATTR_MAX, attr, 738 devlink_function_nl_policy, extack); 739 if (err < 0) { 740 NL_SET_ERR_MSG(extack, "Fail to parse port function attributes"); 741 return err; 742 } 743 744 err = devlink_port_function_validate(port, tb, extack); 745 if (err) 746 return err; 747 748 attr = tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR]; 749 if (attr) { 750 err = devlink_port_function_hw_addr_set(port, attr, extack); 751 if (err) 752 return err; 753 } 754 755 attr = tb[DEVLINK_PORT_FN_ATTR_CAPS]; 756 if (attr) { 757 err = devlink_port_fn_caps_set(port, attr, extack); 758 if (err) 759 return err; 760 } 761 762 /* Keep this as the last function attribute set, so that when 763 * multiple port function attributes are set along with state, 764 * Those can be applied first before activating the state. 765 */ 766 attr = tb[DEVLINK_PORT_FN_ATTR_STATE]; 767 if (attr) 768 err = devlink_port_fn_state_set(port, attr, extack); 769 770 if (!err) 771 devlink_port_notify(port, DEVLINK_CMD_PORT_NEW); 772 return err; 773 } 774 775 int devlink_nl_cmd_port_set_doit(struct sk_buff *skb, struct genl_info *info) 776 { 777 struct devlink_port *devlink_port = info->user_ptr[1]; 778 int err; 779 780 if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) { 781 enum devlink_port_type port_type; 782 783 port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]); 784 err = devlink_port_type_set(devlink_port, port_type); 785 if (err) 786 return err; 787 } 788 789 if (info->attrs[DEVLINK_ATTR_PORT_FUNCTION]) { 790 struct nlattr *attr = info->attrs[DEVLINK_ATTR_PORT_FUNCTION]; 791 struct netlink_ext_ack *extack = info->extack; 792 793 err = devlink_port_function_set(devlink_port, attr, extack); 794 if (err) 795 return err; 796 } 797 798 return 0; 799 } 800 801 int devlink_nl_cmd_port_split_doit(struct sk_buff *skb, struct genl_info *info) 802 { 803 struct devlink_port *devlink_port = info->user_ptr[1]; 804 struct devlink *devlink = info->user_ptr[0]; 805 u32 count; 806 807 if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PORT_SPLIT_COUNT)) 808 return -EINVAL; 809 if (!devlink_port->ops->port_split) 810 return -EOPNOTSUPP; 811 812 count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]); 813 814 if (!devlink_port->attrs.splittable) { 815 /* Split ports cannot be split. */ 816 if (devlink_port->attrs.split) 817 NL_SET_ERR_MSG(info->extack, "Port cannot be split further"); 818 else 819 NL_SET_ERR_MSG(info->extack, "Port cannot be split"); 820 return -EINVAL; 821 } 822 823 if (count < 2 || !is_power_of_2(count) || count > devlink_port->attrs.lanes) { 824 NL_SET_ERR_MSG(info->extack, "Invalid split count"); 825 return -EINVAL; 826 } 827 828 return devlink_port->ops->port_split(devlink, devlink_port, count, 829 info->extack); 830 } 831 832 int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb, 833 struct genl_info *info) 834 { 835 struct devlink_port *devlink_port = info->user_ptr[1]; 836 struct devlink *devlink = info->user_ptr[0]; 837 838 if (!devlink_port->ops->port_unsplit) 839 return -EOPNOTSUPP; 840 return devlink_port->ops->port_unsplit(devlink, devlink_port, info->extack); 841 } 842 843 int devlink_nl_cmd_port_new_doit(struct sk_buff *skb, struct genl_info *info) 844 { 845 struct netlink_ext_ack *extack = info->extack; 846 struct devlink_port_new_attrs new_attrs = {}; 847 struct devlink *devlink = info->user_ptr[0]; 848 struct devlink_port *devlink_port; 849 struct sk_buff *msg; 850 int err; 851 852 if (!devlink->ops->port_new) 853 return -EOPNOTSUPP; 854 855 if (!info->attrs[DEVLINK_ATTR_PORT_FLAVOUR] || 856 !info->attrs[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]) { 857 NL_SET_ERR_MSG(extack, "Port flavour or PCI PF are not specified"); 858 return -EINVAL; 859 } 860 new_attrs.flavour = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_FLAVOUR]); 861 new_attrs.pfnum = 862 nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]); 863 864 if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) { 865 /* Port index of the new port being created by driver. */ 866 new_attrs.port_index = 867 nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]); 868 new_attrs.port_index_valid = true; 869 } 870 if (info->attrs[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER]) { 871 new_attrs.controller = 872 nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER]); 873 new_attrs.controller_valid = true; 874 } 875 if (new_attrs.flavour == DEVLINK_PORT_FLAVOUR_PCI_SF && 876 info->attrs[DEVLINK_ATTR_PORT_PCI_SF_NUMBER]) { 877 new_attrs.sfnum = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_PCI_SF_NUMBER]); 878 new_attrs.sfnum_valid = true; 879 } 880 881 err = devlink->ops->port_new(devlink, &new_attrs, 882 extack, &devlink_port); 883 if (err) 884 return err; 885 886 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 887 if (!msg) { 888 err = -ENOMEM; 889 goto err_out_port_del; 890 } 891 err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_NEW, 892 info->snd_portid, info->snd_seq, 0, NULL); 893 if (WARN_ON_ONCE(err)) 894 goto err_out_msg_free; 895 err = genlmsg_reply(msg, info); 896 if (err) 897 goto err_out_port_del; 898 return 0; 899 900 err_out_msg_free: 901 nlmsg_free(msg); 902 err_out_port_del: 903 devlink_port->ops->port_del(devlink, devlink_port, NULL); 904 return err; 905 } 906 907 int devlink_nl_cmd_port_del_doit(struct sk_buff *skb, struct genl_info *info) 908 { 909 struct devlink_port *devlink_port = info->user_ptr[1]; 910 struct netlink_ext_ack *extack = info->extack; 911 struct devlink *devlink = info->user_ptr[0]; 912 913 if (!devlink_port->ops->port_del) 914 return -EOPNOTSUPP; 915 916 return devlink_port->ops->port_del(devlink, devlink_port, extack); 917 } 918 919 static void devlink_port_type_warn(struct work_struct *work) 920 { 921 struct devlink_port *port = container_of(to_delayed_work(work), 922 struct devlink_port, 923 type_warn_dw); 924 dev_warn(port->devlink->dev, "Type was not set for devlink port."); 925 } 926 927 static bool devlink_port_type_should_warn(struct devlink_port *devlink_port) 928 { 929 /* Ignore CPU and DSA flavours. */ 930 return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU && 931 devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA && 932 devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_UNUSED; 933 } 934 935 #define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 3600) 936 937 static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port) 938 { 939 if (!devlink_port_type_should_warn(devlink_port)) 940 return; 941 /* Schedule a work to WARN in case driver does not set port 942 * type within timeout. 943 */ 944 schedule_delayed_work(&devlink_port->type_warn_dw, 945 DEVLINK_PORT_TYPE_WARN_TIMEOUT); 946 } 947 948 static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port) 949 { 950 if (!devlink_port_type_should_warn(devlink_port)) 951 return; 952 cancel_delayed_work_sync(&devlink_port->type_warn_dw); 953 } 954 955 /** 956 * devlink_port_init() - Init devlink port 957 * 958 * @devlink: devlink 959 * @devlink_port: devlink port 960 * 961 * Initialize essential stuff that is needed for functions 962 * that may be called before devlink port registration. 963 * Call to this function is optional and not needed 964 * in case the driver does not use such functions. 965 */ 966 void devlink_port_init(struct devlink *devlink, 967 struct devlink_port *devlink_port) 968 { 969 if (devlink_port->initialized) 970 return; 971 devlink_port->devlink = devlink; 972 INIT_LIST_HEAD(&devlink_port->region_list); 973 devlink_port->initialized = true; 974 } 975 EXPORT_SYMBOL_GPL(devlink_port_init); 976 977 /** 978 * devlink_port_fini() - Deinitialize devlink port 979 * 980 * @devlink_port: devlink port 981 * 982 * Deinitialize essential stuff that is in use for functions 983 * that may be called after devlink port unregistration. 984 * Call to this function is optional and not needed 985 * in case the driver does not use such functions. 986 */ 987 void devlink_port_fini(struct devlink_port *devlink_port) 988 { 989 WARN_ON(!list_empty(&devlink_port->region_list)); 990 } 991 EXPORT_SYMBOL_GPL(devlink_port_fini); 992 993 static const struct devlink_port_ops devlink_port_dummy_ops = {}; 994 995 /** 996 * devl_port_register_with_ops() - Register devlink port 997 * 998 * @devlink: devlink 999 * @devlink_port: devlink port 1000 * @port_index: driver-specific numerical identifier of the port 1001 * @ops: port ops 1002 * 1003 * Register devlink port with provided port index. User can use 1004 * any indexing, even hw-related one. devlink_port structure 1005 * is convenient to be embedded inside user driver private structure. 1006 * Note that the caller should take care of zeroing the devlink_port 1007 * structure. 1008 */ 1009 int devl_port_register_with_ops(struct devlink *devlink, 1010 struct devlink_port *devlink_port, 1011 unsigned int port_index, 1012 const struct devlink_port_ops *ops) 1013 { 1014 int err; 1015 1016 devl_assert_locked(devlink); 1017 1018 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); 1019 1020 devlink_port_init(devlink, devlink_port); 1021 devlink_port->registered = true; 1022 devlink_port->index = port_index; 1023 devlink_port->ops = ops ? ops : &devlink_port_dummy_ops; 1024 spin_lock_init(&devlink_port->type_lock); 1025 INIT_LIST_HEAD(&devlink_port->reporter_list); 1026 err = xa_insert(&devlink->ports, port_index, devlink_port, GFP_KERNEL); 1027 if (err) { 1028 devlink_port->registered = false; 1029 return err; 1030 } 1031 1032 INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn); 1033 devlink_port_type_warn_schedule(devlink_port); 1034 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); 1035 return 0; 1036 } 1037 EXPORT_SYMBOL_GPL(devl_port_register_with_ops); 1038 1039 /** 1040 * devlink_port_register_with_ops - Register devlink port 1041 * 1042 * @devlink: devlink 1043 * @devlink_port: devlink port 1044 * @port_index: driver-specific numerical identifier of the port 1045 * @ops: port ops 1046 * 1047 * Register devlink port with provided port index. User can use 1048 * any indexing, even hw-related one. devlink_port structure 1049 * is convenient to be embedded inside user driver private structure. 1050 * Note that the caller should take care of zeroing the devlink_port 1051 * structure. 1052 * 1053 * Context: Takes and release devlink->lock <mutex>. 1054 */ 1055 int devlink_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_lock(devlink); 1063 err = devl_port_register_with_ops(devlink, devlink_port, 1064 port_index, ops); 1065 devl_unlock(devlink); 1066 return err; 1067 } 1068 EXPORT_SYMBOL_GPL(devlink_port_register_with_ops); 1069 1070 /** 1071 * devl_port_unregister() - Unregister devlink port 1072 * 1073 * @devlink_port: devlink port 1074 */ 1075 void devl_port_unregister(struct devlink_port *devlink_port) 1076 { 1077 lockdep_assert_held(&devlink_port->devlink->lock); 1078 WARN_ON(devlink_port->type != DEVLINK_PORT_TYPE_NOTSET); 1079 1080 devlink_port_type_warn_cancel(devlink_port); 1081 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL); 1082 xa_erase(&devlink_port->devlink->ports, devlink_port->index); 1083 WARN_ON(!list_empty(&devlink_port->reporter_list)); 1084 devlink_port->registered = false; 1085 } 1086 EXPORT_SYMBOL_GPL(devl_port_unregister); 1087 1088 /** 1089 * devlink_port_unregister - Unregister devlink port 1090 * 1091 * @devlink_port: devlink port 1092 * 1093 * Context: Takes and release devlink->lock <mutex>. 1094 */ 1095 void devlink_port_unregister(struct devlink_port *devlink_port) 1096 { 1097 struct devlink *devlink = devlink_port->devlink; 1098 1099 devl_lock(devlink); 1100 devl_port_unregister(devlink_port); 1101 devl_unlock(devlink); 1102 } 1103 EXPORT_SYMBOL_GPL(devlink_port_unregister); 1104 1105 static void devlink_port_type_netdev_checks(struct devlink_port *devlink_port, 1106 struct net_device *netdev) 1107 { 1108 const struct net_device_ops *ops = netdev->netdev_ops; 1109 1110 /* If driver registers devlink port, it should set devlink port 1111 * attributes accordingly so the compat functions are called 1112 * and the original ops are not used. 1113 */ 1114 if (ops->ndo_get_phys_port_name) { 1115 /* Some drivers use the same set of ndos for netdevs 1116 * that have devlink_port registered and also for 1117 * those who don't. Make sure that ndo_get_phys_port_name 1118 * returns -EOPNOTSUPP here in case it is defined. 1119 * Warn if not. 1120 */ 1121 char name[IFNAMSIZ]; 1122 int err; 1123 1124 err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name)); 1125 WARN_ON(err != -EOPNOTSUPP); 1126 } 1127 if (ops->ndo_get_port_parent_id) { 1128 /* Some drivers use the same set of ndos for netdevs 1129 * that have devlink_port registered and also for 1130 * those who don't. Make sure that ndo_get_port_parent_id 1131 * returns -EOPNOTSUPP here in case it is defined. 1132 * Warn if not. 1133 */ 1134 struct netdev_phys_item_id ppid; 1135 int err; 1136 1137 err = ops->ndo_get_port_parent_id(netdev, &ppid); 1138 WARN_ON(err != -EOPNOTSUPP); 1139 } 1140 } 1141 1142 static void __devlink_port_type_set(struct devlink_port *devlink_port, 1143 enum devlink_port_type type, 1144 void *type_dev) 1145 { 1146 struct net_device *netdev = type_dev; 1147 1148 ASSERT_DEVLINK_PORT_REGISTERED(devlink_port); 1149 1150 if (type == DEVLINK_PORT_TYPE_NOTSET) { 1151 devlink_port_type_warn_schedule(devlink_port); 1152 } else { 1153 devlink_port_type_warn_cancel(devlink_port); 1154 if (type == DEVLINK_PORT_TYPE_ETH && netdev) 1155 devlink_port_type_netdev_checks(devlink_port, netdev); 1156 } 1157 1158 spin_lock_bh(&devlink_port->type_lock); 1159 devlink_port->type = type; 1160 switch (type) { 1161 case DEVLINK_PORT_TYPE_ETH: 1162 devlink_port->type_eth.netdev = netdev; 1163 if (netdev) { 1164 ASSERT_RTNL(); 1165 devlink_port->type_eth.ifindex = netdev->ifindex; 1166 BUILD_BUG_ON(sizeof(devlink_port->type_eth.ifname) != 1167 sizeof(netdev->name)); 1168 strcpy(devlink_port->type_eth.ifname, netdev->name); 1169 } 1170 break; 1171 case DEVLINK_PORT_TYPE_IB: 1172 devlink_port->type_ib.ibdev = type_dev; 1173 break; 1174 default: 1175 break; 1176 } 1177 spin_unlock_bh(&devlink_port->type_lock); 1178 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); 1179 } 1180 1181 /** 1182 * devlink_port_type_eth_set - Set port type to Ethernet 1183 * 1184 * @devlink_port: devlink port 1185 * 1186 * If driver is calling this, most likely it is doing something wrong. 1187 */ 1188 void devlink_port_type_eth_set(struct devlink_port *devlink_port) 1189 { 1190 dev_warn(devlink_port->devlink->dev, 1191 "devlink port type for port %d set to Ethernet without a software interface reference, device type not supported by the kernel?\n", 1192 devlink_port->index); 1193 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, NULL); 1194 } 1195 EXPORT_SYMBOL_GPL(devlink_port_type_eth_set); 1196 1197 /** 1198 * devlink_port_type_ib_set - Set port type to InfiniBand 1199 * 1200 * @devlink_port: devlink port 1201 * @ibdev: related IB device 1202 */ 1203 void devlink_port_type_ib_set(struct devlink_port *devlink_port, 1204 struct ib_device *ibdev) 1205 { 1206 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev); 1207 } 1208 EXPORT_SYMBOL_GPL(devlink_port_type_ib_set); 1209 1210 /** 1211 * devlink_port_type_clear - Clear port type 1212 * 1213 * @devlink_port: devlink port 1214 * 1215 * If driver is calling this for clearing Ethernet type, most likely 1216 * it is doing something wrong. 1217 */ 1218 void devlink_port_type_clear(struct devlink_port *devlink_port) 1219 { 1220 if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) 1221 dev_warn(devlink_port->devlink->dev, 1222 "devlink port type for port %d cleared without a software interface reference, device type not supported by the kernel?\n", 1223 devlink_port->index); 1224 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL); 1225 } 1226 EXPORT_SYMBOL_GPL(devlink_port_type_clear); 1227 1228 int devlink_port_netdevice_event(struct notifier_block *nb, 1229 unsigned long event, void *ptr) 1230 { 1231 struct net_device *netdev = netdev_notifier_info_to_dev(ptr); 1232 struct devlink_port *devlink_port = netdev->devlink_port; 1233 struct devlink *devlink; 1234 1235 if (!devlink_port) 1236 return NOTIFY_OK; 1237 devlink = devlink_port->devlink; 1238 1239 switch (event) { 1240 case NETDEV_POST_INIT: 1241 /* Set the type but not netdev pointer. It is going to be set 1242 * later on by NETDEV_REGISTER event. Happens once during 1243 * netdevice register 1244 */ 1245 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, 1246 NULL); 1247 break; 1248 case NETDEV_REGISTER: 1249 case NETDEV_CHANGENAME: 1250 if (devlink_net(devlink) != dev_net(netdev)) 1251 return NOTIFY_OK; 1252 /* Set the netdev on top of previously set type. Note this 1253 * event happens also during net namespace change so here 1254 * we take into account netdev pointer appearing in this 1255 * namespace. 1256 */ 1257 __devlink_port_type_set(devlink_port, devlink_port->type, 1258 netdev); 1259 break; 1260 case NETDEV_UNREGISTER: 1261 if (devlink_net(devlink) != dev_net(netdev)) 1262 return NOTIFY_OK; 1263 /* Clear netdev pointer, but not the type. This event happens 1264 * also during net namespace change so we need to clear 1265 * pointer to netdev that is going to another net namespace. 1266 */ 1267 __devlink_port_type_set(devlink_port, devlink_port->type, 1268 NULL); 1269 break; 1270 case NETDEV_PRE_UNINIT: 1271 /* Clear the type and the netdev pointer. Happens one during 1272 * netdevice unregister. 1273 */ 1274 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, 1275 NULL); 1276 break; 1277 } 1278 1279 return NOTIFY_OK; 1280 } 1281 1282 static int __devlink_port_attrs_set(struct devlink_port *devlink_port, 1283 enum devlink_port_flavour flavour) 1284 { 1285 struct devlink_port_attrs *attrs = &devlink_port->attrs; 1286 1287 devlink_port->attrs_set = true; 1288 attrs->flavour = flavour; 1289 if (attrs->switch_id.id_len) { 1290 devlink_port->switch_port = true; 1291 if (WARN_ON(attrs->switch_id.id_len > MAX_PHYS_ITEM_ID_LEN)) 1292 attrs->switch_id.id_len = MAX_PHYS_ITEM_ID_LEN; 1293 } else { 1294 devlink_port->switch_port = false; 1295 } 1296 return 0; 1297 } 1298 1299 /** 1300 * devlink_port_attrs_set - Set port attributes 1301 * 1302 * @devlink_port: devlink port 1303 * @attrs: devlink port attrs 1304 */ 1305 void devlink_port_attrs_set(struct devlink_port *devlink_port, 1306 struct devlink_port_attrs *attrs) 1307 { 1308 int ret; 1309 1310 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); 1311 1312 devlink_port->attrs = *attrs; 1313 ret = __devlink_port_attrs_set(devlink_port, attrs->flavour); 1314 if (ret) 1315 return; 1316 WARN_ON(attrs->splittable && attrs->split); 1317 } 1318 EXPORT_SYMBOL_GPL(devlink_port_attrs_set); 1319 1320 /** 1321 * devlink_port_attrs_pci_pf_set - Set PCI PF port attributes 1322 * 1323 * @devlink_port: devlink port 1324 * @controller: associated controller number for the devlink port instance 1325 * @pf: associated PF for the devlink port instance 1326 * @external: indicates if the port is for an external controller 1327 */ 1328 void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port, u32 controller, 1329 u16 pf, bool external) 1330 { 1331 struct devlink_port_attrs *attrs = &devlink_port->attrs; 1332 int ret; 1333 1334 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); 1335 1336 ret = __devlink_port_attrs_set(devlink_port, 1337 DEVLINK_PORT_FLAVOUR_PCI_PF); 1338 if (ret) 1339 return; 1340 attrs->pci_pf.controller = controller; 1341 attrs->pci_pf.pf = pf; 1342 attrs->pci_pf.external = external; 1343 } 1344 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set); 1345 1346 /** 1347 * devlink_port_attrs_pci_vf_set - Set PCI VF port attributes 1348 * 1349 * @devlink_port: devlink port 1350 * @controller: associated controller number for the devlink port instance 1351 * @pf: associated PF for the devlink port instance 1352 * @vf: associated VF of a PF for the devlink port instance 1353 * @external: indicates if the port is for an external controller 1354 */ 1355 void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port, u32 controller, 1356 u16 pf, u16 vf, bool external) 1357 { 1358 struct devlink_port_attrs *attrs = &devlink_port->attrs; 1359 int ret; 1360 1361 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); 1362 1363 ret = __devlink_port_attrs_set(devlink_port, 1364 DEVLINK_PORT_FLAVOUR_PCI_VF); 1365 if (ret) 1366 return; 1367 attrs->pci_vf.controller = controller; 1368 attrs->pci_vf.pf = pf; 1369 attrs->pci_vf.vf = vf; 1370 attrs->pci_vf.external = external; 1371 } 1372 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set); 1373 1374 /** 1375 * devlink_port_attrs_pci_sf_set - Set PCI SF port attributes 1376 * 1377 * @devlink_port: devlink port 1378 * @controller: associated controller number for the devlink port instance 1379 * @pf: associated PF for the devlink port instance 1380 * @sf: associated SF of a PF for the devlink port instance 1381 * @external: indicates if the port is for an external controller 1382 */ 1383 void devlink_port_attrs_pci_sf_set(struct devlink_port *devlink_port, u32 controller, 1384 u16 pf, u32 sf, bool external) 1385 { 1386 struct devlink_port_attrs *attrs = &devlink_port->attrs; 1387 int ret; 1388 1389 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); 1390 1391 ret = __devlink_port_attrs_set(devlink_port, 1392 DEVLINK_PORT_FLAVOUR_PCI_SF); 1393 if (ret) 1394 return; 1395 attrs->pci_sf.controller = controller; 1396 attrs->pci_sf.pf = pf; 1397 attrs->pci_sf.sf = sf; 1398 attrs->pci_sf.external = external; 1399 } 1400 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_sf_set); 1401 1402 static void devlink_port_rel_notify_cb(struct devlink *devlink, u32 port_index) 1403 { 1404 struct devlink_port *devlink_port; 1405 1406 devlink_port = devlink_port_get_by_index(devlink, port_index); 1407 if (!devlink_port) 1408 return; 1409 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); 1410 } 1411 1412 static void devlink_port_rel_cleanup_cb(struct devlink *devlink, u32 port_index, 1413 u32 rel_index) 1414 { 1415 struct devlink_port *devlink_port; 1416 1417 devlink_port = devlink_port_get_by_index(devlink, port_index); 1418 if (devlink_port && devlink_port->rel_index == rel_index) 1419 devlink_port->rel_index = 0; 1420 } 1421 1422 /** 1423 * devl_port_fn_devlink_set - Attach peer devlink 1424 * instance to port function. 1425 * @devlink_port: devlink port 1426 * @fn_devlink: devlink instance to attach 1427 */ 1428 int devl_port_fn_devlink_set(struct devlink_port *devlink_port, 1429 struct devlink *fn_devlink) 1430 { 1431 ASSERT_DEVLINK_PORT_REGISTERED(devlink_port); 1432 1433 if (WARN_ON(devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_SF || 1434 devlink_port->attrs.pci_sf.external)) 1435 return -EINVAL; 1436 1437 return devlink_rel_nested_in_add(&devlink_port->rel_index, 1438 devlink_port->devlink->index, 1439 devlink_port->index, 1440 devlink_port_rel_notify_cb, 1441 devlink_port_rel_cleanup_cb, 1442 fn_devlink); 1443 } 1444 EXPORT_SYMBOL_GPL(devl_port_fn_devlink_set); 1445 1446 /** 1447 * devlink_port_linecard_set - Link port with a linecard 1448 * 1449 * @devlink_port: devlink port 1450 * @linecard: devlink linecard 1451 */ 1452 void devlink_port_linecard_set(struct devlink_port *devlink_port, 1453 struct devlink_linecard *linecard) 1454 { 1455 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); 1456 1457 devlink_port->linecard = linecard; 1458 } 1459 EXPORT_SYMBOL_GPL(devlink_port_linecard_set); 1460 1461 static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port, 1462 char *name, size_t len) 1463 { 1464 struct devlink_port_attrs *attrs = &devlink_port->attrs; 1465 int n = 0; 1466 1467 if (!devlink_port->attrs_set) 1468 return -EOPNOTSUPP; 1469 1470 switch (attrs->flavour) { 1471 case DEVLINK_PORT_FLAVOUR_PHYSICAL: 1472 if (devlink_port->linecard) 1473 n = snprintf(name, len, "l%u", 1474 devlink_linecard_index(devlink_port->linecard)); 1475 if (n < len) 1476 n += snprintf(name + n, len - n, "p%u", 1477 attrs->phys.port_number); 1478 if (n < len && attrs->split) 1479 n += snprintf(name + n, len - n, "s%u", 1480 attrs->phys.split_subport_number); 1481 break; 1482 case DEVLINK_PORT_FLAVOUR_CPU: 1483 case DEVLINK_PORT_FLAVOUR_DSA: 1484 case DEVLINK_PORT_FLAVOUR_UNUSED: 1485 /* As CPU and DSA ports do not have a netdevice associated 1486 * case should not ever happen. 1487 */ 1488 WARN_ON(1); 1489 return -EINVAL; 1490 case DEVLINK_PORT_FLAVOUR_PCI_PF: 1491 if (attrs->pci_pf.external) { 1492 n = snprintf(name, len, "c%u", attrs->pci_pf.controller); 1493 if (n >= len) 1494 return -EINVAL; 1495 len -= n; 1496 name += n; 1497 } 1498 n = snprintf(name, len, "pf%u", attrs->pci_pf.pf); 1499 break; 1500 case DEVLINK_PORT_FLAVOUR_PCI_VF: 1501 if (attrs->pci_vf.external) { 1502 n = snprintf(name, len, "c%u", attrs->pci_vf.controller); 1503 if (n >= len) 1504 return -EINVAL; 1505 len -= n; 1506 name += n; 1507 } 1508 n = snprintf(name, len, "pf%uvf%u", 1509 attrs->pci_vf.pf, attrs->pci_vf.vf); 1510 break; 1511 case DEVLINK_PORT_FLAVOUR_PCI_SF: 1512 if (attrs->pci_sf.external) { 1513 n = snprintf(name, len, "c%u", attrs->pci_sf.controller); 1514 if (n >= len) 1515 return -EINVAL; 1516 len -= n; 1517 name += n; 1518 } 1519 n = snprintf(name, len, "pf%usf%u", attrs->pci_sf.pf, 1520 attrs->pci_sf.sf); 1521 break; 1522 case DEVLINK_PORT_FLAVOUR_VIRTUAL: 1523 return -EOPNOTSUPP; 1524 } 1525 1526 if (n >= len) 1527 return -EINVAL; 1528 1529 return 0; 1530 } 1531 1532 int devlink_compat_phys_port_name_get(struct net_device *dev, 1533 char *name, size_t len) 1534 { 1535 struct devlink_port *devlink_port; 1536 1537 /* RTNL mutex is held here which ensures that devlink_port 1538 * instance cannot disappear in the middle. No need to take 1539 * any devlink lock as only permanent values are accessed. 1540 */ 1541 ASSERT_RTNL(); 1542 1543 devlink_port = dev->devlink_port; 1544 if (!devlink_port) 1545 return -EOPNOTSUPP; 1546 1547 return __devlink_port_phys_port_name_get(devlink_port, name, len); 1548 } 1549 1550 int devlink_compat_switch_id_get(struct net_device *dev, 1551 struct netdev_phys_item_id *ppid) 1552 { 1553 struct devlink_port *devlink_port; 1554 1555 /* Caller must hold RTNL mutex or reference to dev, which ensures that 1556 * devlink_port instance cannot disappear in the middle. No need to take 1557 * any devlink lock as only permanent values are accessed. 1558 */ 1559 devlink_port = dev->devlink_port; 1560 if (!devlink_port || !devlink_port->switch_port) 1561 return -EOPNOTSUPP; 1562 1563 memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid)); 1564 1565 return 0; 1566 } 1567