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at d986ba0329dcca102e227995371135c9bbcefb6b 627 lines 17 kB view raw
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 9struct devlink_linecard { 10 struct list_head list; 11 struct devlink *devlink; 12 unsigned int index; 13 const struct devlink_linecard_ops *ops; 14 void *priv; 15 enum devlink_linecard_state state; 16 struct mutex state_lock; /* Protects state */ 17 const char *type; 18 struct devlink_linecard_type *types; 19 unsigned int types_count; 20 u32 rel_index; 21}; 22 23unsigned int devlink_linecard_index(struct devlink_linecard *linecard) 24{ 25 return linecard->index; 26} 27 28static struct devlink_linecard * 29devlink_linecard_get_by_index(struct devlink *devlink, 30 unsigned int linecard_index) 31{ 32 struct devlink_linecard *devlink_linecard; 33 34 list_for_each_entry(devlink_linecard, &devlink->linecard_list, list) { 35 if (devlink_linecard->index == linecard_index) 36 return devlink_linecard; 37 } 38 return NULL; 39} 40 41static bool devlink_linecard_index_exists(struct devlink *devlink, 42 unsigned int linecard_index) 43{ 44 return devlink_linecard_get_by_index(devlink, linecard_index); 45} 46 47static struct devlink_linecard * 48devlink_linecard_get_from_attrs(struct devlink *devlink, struct nlattr **attrs) 49{ 50 if (attrs[DEVLINK_ATTR_LINECARD_INDEX]) { 51 u32 linecard_index = nla_get_u32(attrs[DEVLINK_ATTR_LINECARD_INDEX]); 52 struct devlink_linecard *linecard; 53 54 linecard = devlink_linecard_get_by_index(devlink, linecard_index); 55 if (!linecard) 56 return ERR_PTR(-ENODEV); 57 return linecard; 58 } 59 return ERR_PTR(-EINVAL); 60} 61 62static struct devlink_linecard * 63devlink_linecard_get_from_info(struct devlink *devlink, struct genl_info *info) 64{ 65 return devlink_linecard_get_from_attrs(devlink, info->attrs); 66} 67 68struct devlink_linecard_type { 69 const char *type; 70 const void *priv; 71}; 72 73static int devlink_nl_linecard_fill(struct sk_buff *msg, 74 struct devlink *devlink, 75 struct devlink_linecard *linecard, 76 enum devlink_command cmd, u32 portid, 77 u32 seq, int flags, 78 struct netlink_ext_ack *extack) 79{ 80 struct devlink_linecard_type *linecard_type; 81 struct nlattr *attr; 82 void *hdr; 83 int i; 84 85 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); 86 if (!hdr) 87 return -EMSGSIZE; 88 89 if (devlink_nl_put_handle(msg, devlink)) 90 goto nla_put_failure; 91 if (nla_put_u32(msg, DEVLINK_ATTR_LINECARD_INDEX, linecard->index)) 92 goto nla_put_failure; 93 if (nla_put_u8(msg, DEVLINK_ATTR_LINECARD_STATE, linecard->state)) 94 goto nla_put_failure; 95 if (linecard->type && 96 nla_put_string(msg, DEVLINK_ATTR_LINECARD_TYPE, linecard->type)) 97 goto nla_put_failure; 98 99 if (linecard->types_count) { 100 attr = nla_nest_start(msg, 101 DEVLINK_ATTR_LINECARD_SUPPORTED_TYPES); 102 if (!attr) 103 goto nla_put_failure; 104 for (i = 0; i < linecard->types_count; i++) { 105 linecard_type = &linecard->types[i]; 106 if (nla_put_string(msg, DEVLINK_ATTR_LINECARD_TYPE, 107 linecard_type->type)) { 108 nla_nest_cancel(msg, attr); 109 goto nla_put_failure; 110 } 111 } 112 nla_nest_end(msg, attr); 113 } 114 115 if (devlink_rel_devlink_handle_put(msg, devlink, 116 linecard->rel_index, 117 DEVLINK_ATTR_NESTED_DEVLINK, 118 NULL)) 119 goto nla_put_failure; 120 121 genlmsg_end(msg, hdr); 122 return 0; 123 124nla_put_failure: 125 genlmsg_cancel(msg, hdr); 126 return -EMSGSIZE; 127} 128 129static void devlink_linecard_notify(struct devlink_linecard *linecard, 130 enum devlink_command cmd) 131{ 132 struct devlink *devlink = linecard->devlink; 133 struct sk_buff *msg; 134 int err; 135 136 WARN_ON(cmd != DEVLINK_CMD_LINECARD_NEW && 137 cmd != DEVLINK_CMD_LINECARD_DEL); 138 139 if (!__devl_is_registered(devlink) || !devlink_nl_notify_need(devlink)) 140 return; 141 142 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 143 if (!msg) 144 return; 145 146 err = devlink_nl_linecard_fill(msg, devlink, linecard, cmd, 0, 0, 0, 147 NULL); 148 if (err) { 149 nlmsg_free(msg); 150 return; 151 } 152 153 devlink_nl_notify_send(devlink, msg); 154} 155 156void devlink_linecards_notify_register(struct devlink *devlink) 157{ 158 struct devlink_linecard *linecard; 159 160 list_for_each_entry(linecard, &devlink->linecard_list, list) 161 devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); 162} 163 164void devlink_linecards_notify_unregister(struct devlink *devlink) 165{ 166 struct devlink_linecard *linecard; 167 168 list_for_each_entry_reverse(linecard, &devlink->linecard_list, list) 169 devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_DEL); 170} 171 172int devlink_nl_linecard_get_doit(struct sk_buff *skb, struct genl_info *info) 173{ 174 struct devlink *devlink = info->user_ptr[0]; 175 struct devlink_linecard *linecard; 176 struct sk_buff *msg; 177 int err; 178 179 linecard = devlink_linecard_get_from_info(devlink, info); 180 if (IS_ERR(linecard)) 181 return PTR_ERR(linecard); 182 183 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 184 if (!msg) 185 return -ENOMEM; 186 187 mutex_lock(&linecard->state_lock); 188 err = devlink_nl_linecard_fill(msg, devlink, linecard, 189 DEVLINK_CMD_LINECARD_NEW, 190 info->snd_portid, info->snd_seq, 0, 191 info->extack); 192 mutex_unlock(&linecard->state_lock); 193 if (err) { 194 nlmsg_free(msg); 195 return err; 196 } 197 198 return genlmsg_reply(msg, info); 199} 200 201static int devlink_nl_linecard_get_dump_one(struct sk_buff *msg, 202 struct devlink *devlink, 203 struct netlink_callback *cb, 204 int flags) 205{ 206 struct devlink_nl_dump_state *state = devlink_dump_state(cb); 207 struct devlink_linecard *linecard; 208 int idx = 0; 209 int err = 0; 210 211 list_for_each_entry(linecard, &devlink->linecard_list, list) { 212 if (idx < state->idx) { 213 idx++; 214 continue; 215 } 216 mutex_lock(&linecard->state_lock); 217 err = devlink_nl_linecard_fill(msg, devlink, linecard, 218 DEVLINK_CMD_LINECARD_NEW, 219 NETLINK_CB(cb->skb).portid, 220 cb->nlh->nlmsg_seq, flags, 221 cb->extack); 222 mutex_unlock(&linecard->state_lock); 223 if (err) { 224 state->idx = idx; 225 break; 226 } 227 idx++; 228 } 229 230 return err; 231} 232 233int devlink_nl_linecard_get_dumpit(struct sk_buff *skb, 234 struct netlink_callback *cb) 235{ 236 return devlink_nl_dumpit(skb, cb, devlink_nl_linecard_get_dump_one); 237} 238 239static struct devlink_linecard_type * 240devlink_linecard_type_lookup(struct devlink_linecard *linecard, 241 const char *type) 242{ 243 struct devlink_linecard_type *linecard_type; 244 int i; 245 246 for (i = 0; i < linecard->types_count; i++) { 247 linecard_type = &linecard->types[i]; 248 if (!strcmp(type, linecard_type->type)) 249 return linecard_type; 250 } 251 return NULL; 252} 253 254static int devlink_linecard_type_set(struct devlink_linecard *linecard, 255 const char *type, 256 struct netlink_ext_ack *extack) 257{ 258 const struct devlink_linecard_ops *ops = linecard->ops; 259 struct devlink_linecard_type *linecard_type; 260 int err; 261 262 mutex_lock(&linecard->state_lock); 263 if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING) { 264 NL_SET_ERR_MSG(extack, "Line card is currently being provisioned"); 265 err = -EBUSY; 266 goto out; 267 } 268 if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONING) { 269 NL_SET_ERR_MSG(extack, "Line card is currently being unprovisioned"); 270 err = -EBUSY; 271 goto out; 272 } 273 274 linecard_type = devlink_linecard_type_lookup(linecard, type); 275 if (!linecard_type) { 276 NL_SET_ERR_MSG(extack, "Unsupported line card type provided"); 277 err = -EINVAL; 278 goto out; 279 } 280 281 if (linecard->state != DEVLINK_LINECARD_STATE_UNPROVISIONED && 282 linecard->state != DEVLINK_LINECARD_STATE_PROVISIONING_FAILED) { 283 NL_SET_ERR_MSG(extack, "Line card already provisioned"); 284 err = -EBUSY; 285 /* Check if the line card is provisioned in the same 286 * way the user asks. In case it is, make the operation 287 * to return success. 288 */ 289 if (ops->same_provision && 290 ops->same_provision(linecard, linecard->priv, 291 linecard_type->type, 292 linecard_type->priv)) 293 err = 0; 294 goto out; 295 } 296 297 linecard->state = DEVLINK_LINECARD_STATE_PROVISIONING; 298 linecard->type = linecard_type->type; 299 devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); 300 mutex_unlock(&linecard->state_lock); 301 err = ops->provision(linecard, linecard->priv, linecard_type->type, 302 linecard_type->priv, extack); 303 if (err) { 304 /* Provisioning failed. Assume the linecard is unprovisioned 305 * for future operations. 306 */ 307 mutex_lock(&linecard->state_lock); 308 linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED; 309 linecard->type = NULL; 310 devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); 311 mutex_unlock(&linecard->state_lock); 312 } 313 return err; 314 315out: 316 mutex_unlock(&linecard->state_lock); 317 return err; 318} 319 320static int devlink_linecard_type_unset(struct devlink_linecard *linecard, 321 struct netlink_ext_ack *extack) 322{ 323 int err; 324 325 mutex_lock(&linecard->state_lock); 326 if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING) { 327 NL_SET_ERR_MSG(extack, "Line card is currently being provisioned"); 328 err = -EBUSY; 329 goto out; 330 } 331 if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONING) { 332 NL_SET_ERR_MSG(extack, "Line card is currently being unprovisioned"); 333 err = -EBUSY; 334 goto out; 335 } 336 if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING_FAILED) { 337 linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED; 338 linecard->type = NULL; 339 devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); 340 err = 0; 341 goto out; 342 } 343 344 if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONED) { 345 NL_SET_ERR_MSG(extack, "Line card is not provisioned"); 346 err = 0; 347 goto out; 348 } 349 linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONING; 350 devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); 351 mutex_unlock(&linecard->state_lock); 352 err = linecard->ops->unprovision(linecard, linecard->priv, 353 extack); 354 if (err) { 355 /* Unprovisioning failed. Assume the linecard is unprovisioned 356 * for future operations. 357 */ 358 mutex_lock(&linecard->state_lock); 359 linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED; 360 linecard->type = NULL; 361 devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); 362 mutex_unlock(&linecard->state_lock); 363 } 364 return err; 365 366out: 367 mutex_unlock(&linecard->state_lock); 368 return err; 369} 370 371int devlink_nl_linecard_set_doit(struct sk_buff *skb, struct genl_info *info) 372{ 373 struct netlink_ext_ack *extack = info->extack; 374 struct devlink *devlink = info->user_ptr[0]; 375 struct devlink_linecard *linecard; 376 int err; 377 378 linecard = devlink_linecard_get_from_info(devlink, info); 379 if (IS_ERR(linecard)) 380 return PTR_ERR(linecard); 381 382 if (info->attrs[DEVLINK_ATTR_LINECARD_TYPE]) { 383 const char *type; 384 385 type = nla_data(info->attrs[DEVLINK_ATTR_LINECARD_TYPE]); 386 if (strcmp(type, "")) { 387 err = devlink_linecard_type_set(linecard, type, extack); 388 if (err) 389 return err; 390 } else { 391 err = devlink_linecard_type_unset(linecard, extack); 392 if (err) 393 return err; 394 } 395 } 396 397 return 0; 398} 399 400static int devlink_linecard_types_init(struct devlink_linecard *linecard) 401{ 402 struct devlink_linecard_type *linecard_type; 403 unsigned int count; 404 int i; 405 406 count = linecard->ops->types_count(linecard, linecard->priv); 407 linecard->types = kmalloc_objs(*linecard_type, count); 408 if (!linecard->types) 409 return -ENOMEM; 410 linecard->types_count = count; 411 412 for (i = 0; i < count; i++) { 413 linecard_type = &linecard->types[i]; 414 linecard->ops->types_get(linecard, linecard->priv, i, 415 &linecard_type->type, 416 &linecard_type->priv); 417 } 418 return 0; 419} 420 421static void devlink_linecard_types_fini(struct devlink_linecard *linecard) 422{ 423 kfree(linecard->types); 424} 425 426/** 427 * devl_linecard_create - Create devlink linecard 428 * 429 * @devlink: devlink 430 * @linecard_index: driver-specific numerical identifier of the linecard 431 * @ops: linecards ops 432 * @priv: user priv pointer 433 * 434 * Create devlink linecard instance with provided linecard index. 435 * Caller can use any indexing, even hw-related one. 436 * 437 * Return: Line card structure or an ERR_PTR() encoded error code. 438 */ 439struct devlink_linecard * 440devl_linecard_create(struct devlink *devlink, unsigned int linecard_index, 441 const struct devlink_linecard_ops *ops, void *priv) 442{ 443 struct devlink_linecard *linecard; 444 int err; 445 446 if (WARN_ON(!ops || !ops->provision || !ops->unprovision || 447 !ops->types_count || !ops->types_get)) 448 return ERR_PTR(-EINVAL); 449 450 if (devlink_linecard_index_exists(devlink, linecard_index)) 451 return ERR_PTR(-EEXIST); 452 453 linecard = kzalloc_obj(*linecard); 454 if (!linecard) 455 return ERR_PTR(-ENOMEM); 456 457 linecard->devlink = devlink; 458 linecard->index = linecard_index; 459 linecard->ops = ops; 460 linecard->priv = priv; 461 linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED; 462 mutex_init(&linecard->state_lock); 463 464 err = devlink_linecard_types_init(linecard); 465 if (err) { 466 mutex_destroy(&linecard->state_lock); 467 kfree(linecard); 468 return ERR_PTR(err); 469 } 470 471 list_add_tail(&linecard->list, &devlink->linecard_list); 472 devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); 473 return linecard; 474} 475EXPORT_SYMBOL_GPL(devl_linecard_create); 476 477/** 478 * devl_linecard_destroy - Destroy devlink linecard 479 * 480 * @linecard: devlink linecard 481 */ 482void devl_linecard_destroy(struct devlink_linecard *linecard) 483{ 484 devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_DEL); 485 list_del(&linecard->list); 486 devlink_linecard_types_fini(linecard); 487 mutex_destroy(&linecard->state_lock); 488 kfree(linecard); 489} 490EXPORT_SYMBOL_GPL(devl_linecard_destroy); 491 492/** 493 * devlink_linecard_provision_set - Set provisioning on linecard 494 * 495 * @linecard: devlink linecard 496 * @type: linecard type 497 * 498 * This is either called directly from the provision() op call or 499 * as a result of the provision() op call asynchronously. 500 */ 501void devlink_linecard_provision_set(struct devlink_linecard *linecard, 502 const char *type) 503{ 504 mutex_lock(&linecard->state_lock); 505 WARN_ON(linecard->type && strcmp(linecard->type, type)); 506 linecard->state = DEVLINK_LINECARD_STATE_PROVISIONED; 507 linecard->type = type; 508 devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); 509 mutex_unlock(&linecard->state_lock); 510} 511EXPORT_SYMBOL_GPL(devlink_linecard_provision_set); 512 513/** 514 * devlink_linecard_provision_clear - Clear provisioning on linecard 515 * 516 * @linecard: devlink linecard 517 * 518 * This is either called directly from the unprovision() op call or 519 * as a result of the unprovision() op call asynchronously. 520 */ 521void devlink_linecard_provision_clear(struct devlink_linecard *linecard) 522{ 523 mutex_lock(&linecard->state_lock); 524 linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED; 525 linecard->type = NULL; 526 devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); 527 mutex_unlock(&linecard->state_lock); 528} 529EXPORT_SYMBOL_GPL(devlink_linecard_provision_clear); 530 531/** 532 * devlink_linecard_provision_fail - Fail provisioning on linecard 533 * 534 * @linecard: devlink linecard 535 * 536 * This is either called directly from the provision() op call or 537 * as a result of the provision() op call asynchronously. 538 */ 539void devlink_linecard_provision_fail(struct devlink_linecard *linecard) 540{ 541 mutex_lock(&linecard->state_lock); 542 linecard->state = DEVLINK_LINECARD_STATE_PROVISIONING_FAILED; 543 devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); 544 mutex_unlock(&linecard->state_lock); 545} 546EXPORT_SYMBOL_GPL(devlink_linecard_provision_fail); 547 548/** 549 * devlink_linecard_activate - Set linecard active 550 * 551 * @linecard: devlink linecard 552 */ 553void devlink_linecard_activate(struct devlink_linecard *linecard) 554{ 555 mutex_lock(&linecard->state_lock); 556 WARN_ON(linecard->state != DEVLINK_LINECARD_STATE_PROVISIONED); 557 linecard->state = DEVLINK_LINECARD_STATE_ACTIVE; 558 devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); 559 mutex_unlock(&linecard->state_lock); 560} 561EXPORT_SYMBOL_GPL(devlink_linecard_activate); 562 563/** 564 * devlink_linecard_deactivate - Set linecard inactive 565 * 566 * @linecard: devlink linecard 567 */ 568void devlink_linecard_deactivate(struct devlink_linecard *linecard) 569{ 570 mutex_lock(&linecard->state_lock); 571 switch (linecard->state) { 572 case DEVLINK_LINECARD_STATE_ACTIVE: 573 linecard->state = DEVLINK_LINECARD_STATE_PROVISIONED; 574 devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); 575 break; 576 case DEVLINK_LINECARD_STATE_UNPROVISIONING: 577 /* Line card is being deactivated as part 578 * of unprovisioning flow. 579 */ 580 break; 581 default: 582 WARN_ON(1); 583 break; 584 } 585 mutex_unlock(&linecard->state_lock); 586} 587EXPORT_SYMBOL_GPL(devlink_linecard_deactivate); 588 589static void devlink_linecard_rel_notify_cb(struct devlink *devlink, 590 u32 linecard_index) 591{ 592 struct devlink_linecard *linecard; 593 594 linecard = devlink_linecard_get_by_index(devlink, linecard_index); 595 if (!linecard) 596 return; 597 devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); 598} 599 600static void devlink_linecard_rel_cleanup_cb(struct devlink *devlink, 601 u32 linecard_index, u32 rel_index) 602{ 603 struct devlink_linecard *linecard; 604 605 linecard = devlink_linecard_get_by_index(devlink, linecard_index); 606 if (linecard && linecard->rel_index == rel_index) 607 linecard->rel_index = 0; 608} 609 610/** 611 * devlink_linecard_nested_dl_set - Attach/detach nested devlink 612 * instance to linecard. 613 * 614 * @linecard: devlink linecard 615 * @nested_devlink: devlink instance to attach or NULL to detach 616 */ 617int devlink_linecard_nested_dl_set(struct devlink_linecard *linecard, 618 struct devlink *nested_devlink) 619{ 620 return devlink_rel_nested_in_add(&linecard->rel_index, 621 linecard->devlink->index, 622 linecard->index, 623 devlink_linecard_rel_notify_cb, 624 devlink_linecard_rel_cleanup_cb, 625 nested_devlink); 626} 627EXPORT_SYMBOL_GPL(devlink_linecard_nested_dl_set);