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_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_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_port_unsplit_doit(struct sk_buff *skb, struct genl_info *info) 833 { 834 struct devlink_port *devlink_port = info->user_ptr[1]; 835 struct devlink *devlink = info->user_ptr[0]; 836 837 if (!devlink_port->ops->port_unsplit) 838 return -EOPNOTSUPP; 839 return devlink_port->ops->port_unsplit(devlink, devlink_port, info->extack); 840 } 841 842 int devlink_nl_port_new_doit(struct sk_buff *skb, struct genl_info *info) 843 { 844 struct netlink_ext_ack *extack = info->extack; 845 struct devlink_port_new_attrs new_attrs = {}; 846 struct devlink *devlink = info->user_ptr[0]; 847 struct devlink_port *devlink_port; 848 struct sk_buff *msg; 849 int err; 850 851 if (!devlink->ops->port_new) 852 return -EOPNOTSUPP; 853 854 if (!info->attrs[DEVLINK_ATTR_PORT_FLAVOUR] || 855 !info->attrs[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]) { 856 NL_SET_ERR_MSG(extack, "Port flavour or PCI PF are not specified"); 857 return -EINVAL; 858 } 859 new_attrs.flavour = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_FLAVOUR]); 860 new_attrs.pfnum = 861 nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]); 862 863 if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) { 864 /* Port index of the new port being created by driver. */ 865 new_attrs.port_index = 866 nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]); 867 new_attrs.port_index_valid = true; 868 } 869 if (info->attrs[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER]) { 870 new_attrs.controller = 871 nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER]); 872 new_attrs.controller_valid = true; 873 } 874 if (new_attrs.flavour == DEVLINK_PORT_FLAVOUR_PCI_SF && 875 info->attrs[DEVLINK_ATTR_PORT_PCI_SF_NUMBER]) { 876 new_attrs.sfnum = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_PCI_SF_NUMBER]); 877 new_attrs.sfnum_valid = true; 878 } 879 880 err = devlink->ops->port_new(devlink, &new_attrs, 881 extack, &devlink_port); 882 if (err) 883 return err; 884 885 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 886 if (!msg) { 887 err = -ENOMEM; 888 goto err_out_port_del; 889 } 890 err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_NEW, 891 info->snd_portid, info->snd_seq, 0, NULL); 892 if (WARN_ON_ONCE(err)) 893 goto err_out_msg_free; 894 err = genlmsg_reply(msg, info); 895 if (err) 896 goto err_out_port_del; 897 return 0; 898 899 err_out_msg_free: 900 nlmsg_free(msg); 901 err_out_port_del: 902 devlink_port->ops->port_del(devlink, devlink_port, NULL); 903 return err; 904 } 905 906 int devlink_nl_port_del_doit(struct sk_buff *skb, struct genl_info *info) 907 { 908 struct devlink_port *devlink_port = info->user_ptr[1]; 909 struct netlink_ext_ack *extack = info->extack; 910 struct devlink *devlink = info->user_ptr[0]; 911 912 if (!devlink_port->ops->port_del) 913 return -EOPNOTSUPP; 914 915 return devlink_port->ops->port_del(devlink, devlink_port, extack); 916 } 917 918 static void devlink_port_type_warn(struct work_struct *work) 919 { 920 struct devlink_port *port = container_of(to_delayed_work(work), 921 struct devlink_port, 922 type_warn_dw); 923 dev_warn(port->devlink->dev, "Type was not set for devlink port."); 924 } 925 926 static bool devlink_port_type_should_warn(struct devlink_port *devlink_port) 927 { 928 /* Ignore CPU and DSA flavours. */ 929 return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU && 930 devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA && 931 devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_UNUSED; 932 } 933 934 #define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 3600) 935 936 static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port) 937 { 938 if (!devlink_port_type_should_warn(devlink_port)) 939 return; 940 /* Schedule a work to WARN in case driver does not set port 941 * type within timeout. 942 */ 943 schedule_delayed_work(&devlink_port->type_warn_dw, 944 DEVLINK_PORT_TYPE_WARN_TIMEOUT); 945 } 946 947 static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port) 948 { 949 if (!devlink_port_type_should_warn(devlink_port)) 950 return; 951 cancel_delayed_work_sync(&devlink_port->type_warn_dw); 952 } 953 954 /** 955 * devlink_port_init() - Init devlink port 956 * 957 * @devlink: devlink 958 * @devlink_port: devlink port 959 * 960 * Initialize essential stuff that is needed for functions 961 * that may be called before devlink port registration. 962 * Call to this function is optional and not needed 963 * in case the driver does not use such functions. 964 */ 965 void devlink_port_init(struct devlink *devlink, 966 struct devlink_port *devlink_port) 967 { 968 if (devlink_port->initialized) 969 return; 970 devlink_port->devlink = devlink; 971 INIT_LIST_HEAD(&devlink_port->region_list); 972 devlink_port->initialized = true; 973 } 974 EXPORT_SYMBOL_GPL(devlink_port_init); 975 976 /** 977 * devlink_port_fini() - Deinitialize devlink port 978 * 979 * @devlink_port: devlink port 980 * 981 * Deinitialize essential stuff that is in use for functions 982 * that may be called after devlink port unregistration. 983 * Call to this function is optional and not needed 984 * in case the driver does not use such functions. 985 */ 986 void devlink_port_fini(struct devlink_port *devlink_port) 987 { 988 WARN_ON(!list_empty(&devlink_port->region_list)); 989 } 990 EXPORT_SYMBOL_GPL(devlink_port_fini); 991 992 static const struct devlink_port_ops devlink_port_dummy_ops = {}; 993 994 /** 995 * devl_port_register_with_ops() - Register devlink port 996 * 997 * @devlink: devlink 998 * @devlink_port: devlink port 999 * @port_index: driver-specific numerical identifier of the port 1000 * @ops: port ops 1001 * 1002 * Register devlink port with provided port index. User can use 1003 * any indexing, even hw-related one. devlink_port structure 1004 * is convenient to be embedded inside user driver private structure. 1005 * Note that the caller should take care of zeroing the devlink_port 1006 * structure. 1007 */ 1008 int devl_port_register_with_ops(struct devlink *devlink, 1009 struct devlink_port *devlink_port, 1010 unsigned int port_index, 1011 const struct devlink_port_ops *ops) 1012 { 1013 int err; 1014 1015 devl_assert_locked(devlink); 1016 1017 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); 1018 1019 devlink_port_init(devlink, devlink_port); 1020 devlink_port->registered = true; 1021 devlink_port->index = port_index; 1022 devlink_port->ops = ops ? ops : &devlink_port_dummy_ops; 1023 spin_lock_init(&devlink_port->type_lock); 1024 INIT_LIST_HEAD(&devlink_port->reporter_list); 1025 err = xa_insert(&devlink->ports, port_index, devlink_port, GFP_KERNEL); 1026 if (err) { 1027 devlink_port->registered = false; 1028 return err; 1029 } 1030 1031 INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn); 1032 devlink_port_type_warn_schedule(devlink_port); 1033 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); 1034 return 0; 1035 } 1036 EXPORT_SYMBOL_GPL(devl_port_register_with_ops); 1037 1038 /** 1039 * devlink_port_register_with_ops - Register devlink port 1040 * 1041 * @devlink: devlink 1042 * @devlink_port: devlink port 1043 * @port_index: driver-specific numerical identifier of the port 1044 * @ops: port ops 1045 * 1046 * Register devlink port with provided port index. User can use 1047 * any indexing, even hw-related one. devlink_port structure 1048 * is convenient to be embedded inside user driver private structure. 1049 * Note that the caller should take care of zeroing the devlink_port 1050 * structure. 1051 * 1052 * Context: Takes and release devlink->lock <mutex>. 1053 */ 1054 int devlink_port_register_with_ops(struct devlink *devlink, 1055 struct devlink_port *devlink_port, 1056 unsigned int port_index, 1057 const struct devlink_port_ops *ops) 1058 { 1059 int err; 1060 1061 devl_lock(devlink); 1062 err = devl_port_register_with_ops(devlink, devlink_port, 1063 port_index, ops); 1064 devl_unlock(devlink); 1065 return err; 1066 } 1067 EXPORT_SYMBOL_GPL(devlink_port_register_with_ops); 1068 1069 /** 1070 * devl_port_unregister() - Unregister devlink port 1071 * 1072 * @devlink_port: devlink port 1073 */ 1074 void devl_port_unregister(struct devlink_port *devlink_port) 1075 { 1076 lockdep_assert_held(&devlink_port->devlink->lock); 1077 WARN_ON(devlink_port->type != DEVLINK_PORT_TYPE_NOTSET); 1078 1079 devlink_port_type_warn_cancel(devlink_port); 1080 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL); 1081 xa_erase(&devlink_port->devlink->ports, devlink_port->index); 1082 WARN_ON(!list_empty(&devlink_port->reporter_list)); 1083 devlink_port->registered = false; 1084 } 1085 EXPORT_SYMBOL_GPL(devl_port_unregister); 1086 1087 /** 1088 * devlink_port_unregister - Unregister devlink port 1089 * 1090 * @devlink_port: devlink port 1091 * 1092 * Context: Takes and release devlink->lock <mutex>. 1093 */ 1094 void devlink_port_unregister(struct devlink_port *devlink_port) 1095 { 1096 struct devlink *devlink = devlink_port->devlink; 1097 1098 devl_lock(devlink); 1099 devl_port_unregister(devlink_port); 1100 devl_unlock(devlink); 1101 } 1102 EXPORT_SYMBOL_GPL(devlink_port_unregister); 1103 1104 static void devlink_port_type_netdev_checks(struct devlink_port *devlink_port, 1105 struct net_device *netdev) 1106 { 1107 const struct net_device_ops *ops = netdev->netdev_ops; 1108 1109 /* If driver registers devlink port, it should set devlink port 1110 * attributes accordingly so the compat functions are called 1111 * and the original ops are not used. 1112 */ 1113 if (ops->ndo_get_phys_port_name) { 1114 /* Some drivers use the same set of ndos for netdevs 1115 * that have devlink_port registered and also for 1116 * those who don't. Make sure that ndo_get_phys_port_name 1117 * returns -EOPNOTSUPP here in case it is defined. 1118 * Warn if not. 1119 */ 1120 char name[IFNAMSIZ]; 1121 int err; 1122 1123 err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name)); 1124 WARN_ON(err != -EOPNOTSUPP); 1125 } 1126 if (ops->ndo_get_port_parent_id) { 1127 /* Some drivers use the same set of ndos for netdevs 1128 * that have devlink_port registered and also for 1129 * those who don't. Make sure that ndo_get_port_parent_id 1130 * returns -EOPNOTSUPP here in case it is defined. 1131 * Warn if not. 1132 */ 1133 struct netdev_phys_item_id ppid; 1134 int err; 1135 1136 err = ops->ndo_get_port_parent_id(netdev, &ppid); 1137 WARN_ON(err != -EOPNOTSUPP); 1138 } 1139 } 1140 1141 static void __devlink_port_type_set(struct devlink_port *devlink_port, 1142 enum devlink_port_type type, 1143 void *type_dev) 1144 { 1145 struct net_device *netdev = type_dev; 1146 1147 ASSERT_DEVLINK_PORT_REGISTERED(devlink_port); 1148 1149 if (type == DEVLINK_PORT_TYPE_NOTSET) { 1150 devlink_port_type_warn_schedule(devlink_port); 1151 } else { 1152 devlink_port_type_warn_cancel(devlink_port); 1153 if (type == DEVLINK_PORT_TYPE_ETH && netdev) 1154 devlink_port_type_netdev_checks(devlink_port, netdev); 1155 } 1156 1157 spin_lock_bh(&devlink_port->type_lock); 1158 devlink_port->type = type; 1159 switch (type) { 1160 case DEVLINK_PORT_TYPE_ETH: 1161 devlink_port->type_eth.netdev = netdev; 1162 if (netdev) { 1163 ASSERT_RTNL(); 1164 devlink_port->type_eth.ifindex = netdev->ifindex; 1165 BUILD_BUG_ON(sizeof(devlink_port->type_eth.ifname) != 1166 sizeof(netdev->name)); 1167 strcpy(devlink_port->type_eth.ifname, netdev->name); 1168 } 1169 break; 1170 case DEVLINK_PORT_TYPE_IB: 1171 devlink_port->type_ib.ibdev = type_dev; 1172 break; 1173 default: 1174 break; 1175 } 1176 spin_unlock_bh(&devlink_port->type_lock); 1177 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); 1178 } 1179 1180 /** 1181 * devlink_port_type_eth_set - Set port type to Ethernet 1182 * 1183 * @devlink_port: devlink port 1184 * 1185 * If driver is calling this, most likely it is doing something wrong. 1186 */ 1187 void devlink_port_type_eth_set(struct devlink_port *devlink_port) 1188 { 1189 dev_warn(devlink_port->devlink->dev, 1190 "devlink port type for port %d set to Ethernet without a software interface reference, device type not supported by the kernel?\n", 1191 devlink_port->index); 1192 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, NULL); 1193 } 1194 EXPORT_SYMBOL_GPL(devlink_port_type_eth_set); 1195 1196 /** 1197 * devlink_port_type_ib_set - Set port type to InfiniBand 1198 * 1199 * @devlink_port: devlink port 1200 * @ibdev: related IB device 1201 */ 1202 void devlink_port_type_ib_set(struct devlink_port *devlink_port, 1203 struct ib_device *ibdev) 1204 { 1205 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev); 1206 } 1207 EXPORT_SYMBOL_GPL(devlink_port_type_ib_set); 1208 1209 /** 1210 * devlink_port_type_clear - Clear port type 1211 * 1212 * @devlink_port: devlink port 1213 * 1214 * If driver is calling this for clearing Ethernet type, most likely 1215 * it is doing something wrong. 1216 */ 1217 void devlink_port_type_clear(struct devlink_port *devlink_port) 1218 { 1219 if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) 1220 dev_warn(devlink_port->devlink->dev, 1221 "devlink port type for port %d cleared without a software interface reference, device type not supported by the kernel?\n", 1222 devlink_port->index); 1223 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL); 1224 } 1225 EXPORT_SYMBOL_GPL(devlink_port_type_clear); 1226 1227 int devlink_port_netdevice_event(struct notifier_block *nb, 1228 unsigned long event, void *ptr) 1229 { 1230 struct net_device *netdev = netdev_notifier_info_to_dev(ptr); 1231 struct devlink_port *devlink_port = netdev->devlink_port; 1232 struct devlink *devlink; 1233 1234 if (!devlink_port) 1235 return NOTIFY_OK; 1236 devlink = devlink_port->devlink; 1237 1238 switch (event) { 1239 case NETDEV_POST_INIT: 1240 /* Set the type but not netdev pointer. It is going to be set 1241 * later on by NETDEV_REGISTER event. Happens once during 1242 * netdevice register 1243 */ 1244 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, 1245 NULL); 1246 break; 1247 case NETDEV_REGISTER: 1248 case NETDEV_CHANGENAME: 1249 if (devlink_net(devlink) != dev_net(netdev)) 1250 return NOTIFY_OK; 1251 /* Set the netdev on top of previously set type. Note this 1252 * event happens also during net namespace change so here 1253 * we take into account netdev pointer appearing in this 1254 * namespace. 1255 */ 1256 __devlink_port_type_set(devlink_port, devlink_port->type, 1257 netdev); 1258 break; 1259 case NETDEV_UNREGISTER: 1260 if (devlink_net(devlink) != dev_net(netdev)) 1261 return NOTIFY_OK; 1262 /* Clear netdev pointer, but not the type. This event happens 1263 * also during net namespace change so we need to clear 1264 * pointer to netdev that is going to another net namespace. 1265 */ 1266 __devlink_port_type_set(devlink_port, devlink_port->type, 1267 NULL); 1268 break; 1269 case NETDEV_PRE_UNINIT: 1270 /* Clear the type and the netdev pointer. Happens one during 1271 * netdevice unregister. 1272 */ 1273 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, 1274 NULL); 1275 break; 1276 } 1277 1278 return NOTIFY_OK; 1279 } 1280 1281 static int __devlink_port_attrs_set(struct devlink_port *devlink_port, 1282 enum devlink_port_flavour flavour) 1283 { 1284 struct devlink_port_attrs *attrs = &devlink_port->attrs; 1285 1286 devlink_port->attrs_set = true; 1287 attrs->flavour = flavour; 1288 if (attrs->switch_id.id_len) { 1289 devlink_port->switch_port = true; 1290 if (WARN_ON(attrs->switch_id.id_len > MAX_PHYS_ITEM_ID_LEN)) 1291 attrs->switch_id.id_len = MAX_PHYS_ITEM_ID_LEN; 1292 } else { 1293 devlink_port->switch_port = false; 1294 } 1295 return 0; 1296 } 1297 1298 /** 1299 * devlink_port_attrs_set - Set port attributes 1300 * 1301 * @devlink_port: devlink port 1302 * @attrs: devlink port attrs 1303 */ 1304 void devlink_port_attrs_set(struct devlink_port *devlink_port, 1305 struct devlink_port_attrs *attrs) 1306 { 1307 int ret; 1308 1309 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); 1310 1311 devlink_port->attrs = *attrs; 1312 ret = __devlink_port_attrs_set(devlink_port, attrs->flavour); 1313 if (ret) 1314 return; 1315 WARN_ON(attrs->splittable && attrs->split); 1316 } 1317 EXPORT_SYMBOL_GPL(devlink_port_attrs_set); 1318 1319 /** 1320 * devlink_port_attrs_pci_pf_set - Set PCI PF port attributes 1321 * 1322 * @devlink_port: devlink port 1323 * @controller: associated controller number for the devlink port instance 1324 * @pf: associated PF for the devlink port instance 1325 * @external: indicates if the port is for an external controller 1326 */ 1327 void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port, u32 controller, 1328 u16 pf, bool external) 1329 { 1330 struct devlink_port_attrs *attrs = &devlink_port->attrs; 1331 int ret; 1332 1333 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); 1334 1335 ret = __devlink_port_attrs_set(devlink_port, 1336 DEVLINK_PORT_FLAVOUR_PCI_PF); 1337 if (ret) 1338 return; 1339 attrs->pci_pf.controller = controller; 1340 attrs->pci_pf.pf = pf; 1341 attrs->pci_pf.external = external; 1342 } 1343 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set); 1344 1345 /** 1346 * devlink_port_attrs_pci_vf_set - Set PCI VF port attributes 1347 * 1348 * @devlink_port: devlink port 1349 * @controller: associated controller number for the devlink port instance 1350 * @pf: associated PF for the devlink port instance 1351 * @vf: associated VF of a PF for the devlink port instance 1352 * @external: indicates if the port is for an external controller 1353 */ 1354 void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port, u32 controller, 1355 u16 pf, u16 vf, bool external) 1356 { 1357 struct devlink_port_attrs *attrs = &devlink_port->attrs; 1358 int ret; 1359 1360 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); 1361 1362 ret = __devlink_port_attrs_set(devlink_port, 1363 DEVLINK_PORT_FLAVOUR_PCI_VF); 1364 if (ret) 1365 return; 1366 attrs->pci_vf.controller = controller; 1367 attrs->pci_vf.pf = pf; 1368 attrs->pci_vf.vf = vf; 1369 attrs->pci_vf.external = external; 1370 } 1371 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set); 1372 1373 /** 1374 * devlink_port_attrs_pci_sf_set - Set PCI SF port attributes 1375 * 1376 * @devlink_port: devlink port 1377 * @controller: associated controller number for the devlink port instance 1378 * @pf: associated PF for the devlink port instance 1379 * @sf: associated SF of a PF for the devlink port instance 1380 * @external: indicates if the port is for an external controller 1381 */ 1382 void devlink_port_attrs_pci_sf_set(struct devlink_port *devlink_port, u32 controller, 1383 u16 pf, u32 sf, bool external) 1384 { 1385 struct devlink_port_attrs *attrs = &devlink_port->attrs; 1386 int ret; 1387 1388 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); 1389 1390 ret = __devlink_port_attrs_set(devlink_port, 1391 DEVLINK_PORT_FLAVOUR_PCI_SF); 1392 if (ret) 1393 return; 1394 attrs->pci_sf.controller = controller; 1395 attrs->pci_sf.pf = pf; 1396 attrs->pci_sf.sf = sf; 1397 attrs->pci_sf.external = external; 1398 } 1399 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_sf_set); 1400 1401 static void devlink_port_rel_notify_cb(struct devlink *devlink, u32 port_index) 1402 { 1403 struct devlink_port *devlink_port; 1404 1405 devlink_port = devlink_port_get_by_index(devlink, port_index); 1406 if (!devlink_port) 1407 return; 1408 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); 1409 } 1410 1411 static void devlink_port_rel_cleanup_cb(struct devlink *devlink, u32 port_index, 1412 u32 rel_index) 1413 { 1414 struct devlink_port *devlink_port; 1415 1416 devlink_port = devlink_port_get_by_index(devlink, port_index); 1417 if (devlink_port && devlink_port->rel_index == rel_index) 1418 devlink_port->rel_index = 0; 1419 } 1420 1421 /** 1422 * devl_port_fn_devlink_set - Attach peer devlink 1423 * instance to port function. 1424 * @devlink_port: devlink port 1425 * @fn_devlink: devlink instance to attach 1426 */ 1427 int devl_port_fn_devlink_set(struct devlink_port *devlink_port, 1428 struct devlink *fn_devlink) 1429 { 1430 ASSERT_DEVLINK_PORT_REGISTERED(devlink_port); 1431 1432 if (WARN_ON(devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_SF || 1433 devlink_port->attrs.pci_sf.external)) 1434 return -EINVAL; 1435 1436 return devlink_rel_nested_in_add(&devlink_port->rel_index, 1437 devlink_port->devlink->index, 1438 devlink_port->index, 1439 devlink_port_rel_notify_cb, 1440 devlink_port_rel_cleanup_cb, 1441 fn_devlink); 1442 } 1443 EXPORT_SYMBOL_GPL(devl_port_fn_devlink_set); 1444 1445 /** 1446 * devlink_port_linecard_set - Link port with a linecard 1447 * 1448 * @devlink_port: devlink port 1449 * @linecard: devlink linecard 1450 */ 1451 void devlink_port_linecard_set(struct devlink_port *devlink_port, 1452 struct devlink_linecard *linecard) 1453 { 1454 ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); 1455 1456 devlink_port->linecard = linecard; 1457 } 1458 EXPORT_SYMBOL_GPL(devlink_port_linecard_set); 1459 1460 static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port, 1461 char *name, size_t len) 1462 { 1463 struct devlink_port_attrs *attrs = &devlink_port->attrs; 1464 int n = 0; 1465 1466 if (!devlink_port->attrs_set) 1467 return -EOPNOTSUPP; 1468 1469 switch (attrs->flavour) { 1470 case DEVLINK_PORT_FLAVOUR_PHYSICAL: 1471 if (devlink_port->linecard) 1472 n = snprintf(name, len, "l%u", 1473 devlink_linecard_index(devlink_port->linecard)); 1474 if (n < len) 1475 n += snprintf(name + n, len - n, "p%u", 1476 attrs->phys.port_number); 1477 if (n < len && attrs->split) 1478 n += snprintf(name + n, len - n, "s%u", 1479 attrs->phys.split_subport_number); 1480 break; 1481 case DEVLINK_PORT_FLAVOUR_CPU: 1482 case DEVLINK_PORT_FLAVOUR_DSA: 1483 case DEVLINK_PORT_FLAVOUR_UNUSED: 1484 /* As CPU and DSA ports do not have a netdevice associated 1485 * case should not ever happen. 1486 */ 1487 WARN_ON(1); 1488 return -EINVAL; 1489 case DEVLINK_PORT_FLAVOUR_PCI_PF: 1490 if (attrs->pci_pf.external) { 1491 n = snprintf(name, len, "c%u", attrs->pci_pf.controller); 1492 if (n >= len) 1493 return -EINVAL; 1494 len -= n; 1495 name += n; 1496 } 1497 n = snprintf(name, len, "pf%u", attrs->pci_pf.pf); 1498 break; 1499 case DEVLINK_PORT_FLAVOUR_PCI_VF: 1500 if (attrs->pci_vf.external) { 1501 n = snprintf(name, len, "c%u", attrs->pci_vf.controller); 1502 if (n >= len) 1503 return -EINVAL; 1504 len -= n; 1505 name += n; 1506 } 1507 n = snprintf(name, len, "pf%uvf%u", 1508 attrs->pci_vf.pf, attrs->pci_vf.vf); 1509 break; 1510 case DEVLINK_PORT_FLAVOUR_PCI_SF: 1511 if (attrs->pci_sf.external) { 1512 n = snprintf(name, len, "c%u", attrs->pci_sf.controller); 1513 if (n >= len) 1514 return -EINVAL; 1515 len -= n; 1516 name += n; 1517 } 1518 n = snprintf(name, len, "pf%usf%u", attrs->pci_sf.pf, 1519 attrs->pci_sf.sf); 1520 break; 1521 case DEVLINK_PORT_FLAVOUR_VIRTUAL: 1522 return -EOPNOTSUPP; 1523 } 1524 1525 if (n >= len) 1526 return -EINVAL; 1527 1528 return 0; 1529 } 1530 1531 int devlink_compat_phys_port_name_get(struct net_device *dev, 1532 char *name, size_t len) 1533 { 1534 struct devlink_port *devlink_port; 1535 1536 /* RTNL mutex is held here which ensures that devlink_port 1537 * instance cannot disappear in the middle. No need to take 1538 * any devlink lock as only permanent values are accessed. 1539 */ 1540 ASSERT_RTNL(); 1541 1542 devlink_port = dev->devlink_port; 1543 if (!devlink_port) 1544 return -EOPNOTSUPP; 1545 1546 return __devlink_port_phys_port_name_get(devlink_port, name, len); 1547 } 1548 1549 int devlink_compat_switch_id_get(struct net_device *dev, 1550 struct netdev_phys_item_id *ppid) 1551 { 1552 struct devlink_port *devlink_port; 1553 1554 /* Caller must hold RTNL mutex or reference to dev, which ensures that 1555 * devlink_port instance cannot disappear in the middle. No need to take 1556 * any devlink lock as only permanent values are accessed. 1557 */ 1558 devlink_port = dev->devlink_port; 1559 if (!devlink_port || !devlink_port->switch_port) 1560 return -EOPNOTSUPP; 1561 1562 memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid)); 1563 1564 return 0; 1565 } 1566