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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 | /* * This file is part of the Chelsio T4 Ethernet driver for Linux. * * Copyright (c) 2016 Chelsio Communications, Inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include <linux/module.h> #include <linux/netdevice.h> #include "cxgb4.h" #include "sched.h" /* Spinlock must be held by caller */ static int t4_sched_class_fw_cmd(struct port_info *pi, struct ch_sched_params *p, enum sched_fw_ops op) { struct adapter *adap = pi->adapter; struct sched_table *s = pi->sched_tbl; struct sched_class *e; int err = 0; e = &s->tab[p->u.params.class]; switch (op) { case SCHED_FW_OP_ADD: err = t4_sched_params(adap, p->type, p->u.params.level, p->u.params.mode, p->u.params.rateunit, p->u.params.ratemode, p->u.params.channel, e->idx, p->u.params.minrate, p->u.params.maxrate, p->u.params.weight, p->u.params.pktsize); break; default: err = -ENOTSUPP; break; } return err; } /* Spinlock must be held by caller */ static int t4_sched_bind_unbind_op(struct port_info *pi, void *arg, enum sched_bind_type type, bool bind) { struct adapter *adap = pi->adapter; u32 fw_mnem, fw_class, fw_param; unsigned int pf = adap->pf; unsigned int vf = 0; int err = 0; switch (type) { case SCHED_QUEUE: { struct sched_queue_entry *qe; qe = (struct sched_queue_entry *)arg; /* Create a template for the FW_PARAMS_CMD mnemonic and * value (TX Scheduling Class in this case). */ fw_mnem = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DMAQ) | FW_PARAMS_PARAM_X_V( FW_PARAMS_PARAM_DMAQ_EQ_SCHEDCLASS_ETH)); fw_class = bind ? qe->param.class : FW_SCHED_CLS_NONE; fw_param = (fw_mnem | FW_PARAMS_PARAM_YZ_V(qe->cntxt_id)); pf = adap->pf; vf = 0; break; } default: err = -ENOTSUPP; goto out; } err = t4_set_params(adap, adap->mbox, pf, vf, 1, &fw_param, &fw_class); out: return err; } static struct sched_class *t4_sched_queue_lookup(struct port_info *pi, const unsigned int qid, int *index) { struct sched_table *s = pi->sched_tbl; struct sched_class *e, *end; struct sched_class *found = NULL; int i; /* Look for a class with matching bound queue parameters */ end = &s->tab[s->sched_size]; for (e = &s->tab[0]; e != end; ++e) { struct sched_queue_entry *qe; i = 0; if (e->state == SCHED_STATE_UNUSED) continue; list_for_each_entry(qe, &e->queue_list, list) { if (qe->cntxt_id == qid) { found = e; if (index) *index = i; break; } i++; } if (found) break; } return found; } static int t4_sched_queue_unbind(struct port_info *pi, struct ch_sched_queue *p) { struct adapter *adap = pi->adapter; struct sched_class *e; struct sched_queue_entry *qe = NULL; struct sge_eth_txq *txq; unsigned int qid; int index = -1; int err = 0; if (p->queue < 0 || p->queue >= pi->nqsets) return -ERANGE; txq = &adap->sge.ethtxq[pi->first_qset + p->queue]; qid = txq->q.cntxt_id; /* Find the existing class that the queue is bound to */ e = t4_sched_queue_lookup(pi, qid, &index); if (e && index >= 0) { int i = 0; spin_lock(&e->lock); list_for_each_entry(qe, &e->queue_list, list) { if (i == index) break; i++; } err = t4_sched_bind_unbind_op(pi, (void *)qe, SCHED_QUEUE, false); if (err) { spin_unlock(&e->lock); goto out; } list_del(&qe->list); t4_free_mem(qe); if (atomic_dec_and_test(&e->refcnt)) { e->state = SCHED_STATE_UNUSED; memset(&e->info, 0, sizeof(e->info)); } spin_unlock(&e->lock); } out: return err; } static int t4_sched_queue_bind(struct port_info *pi, struct ch_sched_queue *p) { struct adapter *adap = pi->adapter; struct sched_table *s = pi->sched_tbl; struct sched_class *e; struct sched_queue_entry *qe = NULL; struct sge_eth_txq *txq; unsigned int qid; int err = 0; if (p->queue < 0 || p->queue >= pi->nqsets) return -ERANGE; qe = t4_alloc_mem(sizeof(struct sched_queue_entry)); if (!qe) return -ENOMEM; txq = &adap->sge.ethtxq[pi->first_qset + p->queue]; qid = txq->q.cntxt_id; /* Unbind queue from any existing class */ err = t4_sched_queue_unbind(pi, p); if (err) { t4_free_mem(qe); goto out; } /* Bind queue to specified class */ memset(qe, 0, sizeof(*qe)); qe->cntxt_id = qid; memcpy(&qe->param, p, sizeof(qe->param)); e = &s->tab[qe->param.class]; spin_lock(&e->lock); err = t4_sched_bind_unbind_op(pi, (void *)qe, SCHED_QUEUE, true); if (err) { t4_free_mem(qe); spin_unlock(&e->lock); goto out; } list_add_tail(&qe->list, &e->queue_list); atomic_inc(&e->refcnt); spin_unlock(&e->lock); out: return err; } static void t4_sched_class_unbind_all(struct port_info *pi, struct sched_class *e, enum sched_bind_type type) { if (!e) return; switch (type) { case SCHED_QUEUE: { struct sched_queue_entry *qe; list_for_each_entry(qe, &e->queue_list, list) t4_sched_queue_unbind(pi, &qe->param); break; } default: break; } } static int t4_sched_class_bind_unbind_op(struct port_info *pi, void *arg, enum sched_bind_type type, bool bind) { int err = 0; if (!arg) return -EINVAL; switch (type) { case SCHED_QUEUE: { struct ch_sched_queue *qe = (struct ch_sched_queue *)arg; if (bind) err = t4_sched_queue_bind(pi, qe); else err = t4_sched_queue_unbind(pi, qe); break; } default: err = -ENOTSUPP; break; } return err; } /** * cxgb4_sched_class_bind - Bind an entity to a scheduling class * @dev: net_device pointer * @arg: Entity opaque data * @type: Entity type (Queue) * * Binds an entity (queue) to a scheduling class. If the entity * is bound to another class, it will be unbound from the other class * and bound to the class specified in @arg. */ int cxgb4_sched_class_bind(struct net_device *dev, void *arg, enum sched_bind_type type) { struct port_info *pi = netdev2pinfo(dev); struct sched_table *s; int err = 0; u8 class_id; if (!can_sched(dev)) return -ENOTSUPP; if (!arg) return -EINVAL; switch (type) { case SCHED_QUEUE: { struct ch_sched_queue *qe = (struct ch_sched_queue *)arg; class_id = qe->class; break; } default: return -ENOTSUPP; } if (!valid_class_id(dev, class_id)) return -EINVAL; if (class_id == SCHED_CLS_NONE) return -ENOTSUPP; s = pi->sched_tbl; write_lock(&s->rw_lock); err = t4_sched_class_bind_unbind_op(pi, arg, type, true); write_unlock(&s->rw_lock); return err; } /** * cxgb4_sched_class_unbind - Unbind an entity from a scheduling class * @dev: net_device pointer * @arg: Entity opaque data * @type: Entity type (Queue) * * Unbinds an entity (queue) from a scheduling class. */ int cxgb4_sched_class_unbind(struct net_device *dev, void *arg, enum sched_bind_type type) { struct port_info *pi = netdev2pinfo(dev); struct sched_table *s; int err = 0; u8 class_id; if (!can_sched(dev)) return -ENOTSUPP; if (!arg) return -EINVAL; switch (type) { case SCHED_QUEUE: { struct ch_sched_queue *qe = (struct ch_sched_queue *)arg; class_id = qe->class; break; } default: return -ENOTSUPP; } if (!valid_class_id(dev, class_id)) return -EINVAL; s = pi->sched_tbl; write_lock(&s->rw_lock); err = t4_sched_class_bind_unbind_op(pi, arg, type, false); write_unlock(&s->rw_lock); return err; } /* If @p is NULL, fetch any available unused class */ static struct sched_class *t4_sched_class_lookup(struct port_info *pi, const struct ch_sched_params *p) { struct sched_table *s = pi->sched_tbl; struct sched_class *e, *end; struct sched_class *found = NULL; if (!p) { /* Get any available unused class */ end = &s->tab[s->sched_size]; for (e = &s->tab[0]; e != end; ++e) { if (e->state == SCHED_STATE_UNUSED) { found = e; break; } } } else { /* Look for a class with matching scheduling parameters */ struct ch_sched_params info; struct ch_sched_params tp; memset(&info, 0, sizeof(info)); memset(&tp, 0, sizeof(tp)); memcpy(&tp, p, sizeof(tp)); /* Don't try to match class parameter */ tp.u.params.class = SCHED_CLS_NONE; end = &s->tab[s->sched_size]; for (e = &s->tab[0]; e != end; ++e) { if (e->state == SCHED_STATE_UNUSED) continue; memset(&info, 0, sizeof(info)); memcpy(&info, &e->info, sizeof(info)); /* Don't try to match class parameter */ info.u.params.class = SCHED_CLS_NONE; if ((info.type == tp.type) && (!memcmp(&info.u.params, &tp.u.params, sizeof(info.u.params)))) { found = e; break; } } } return found; } static struct sched_class *t4_sched_class_alloc(struct port_info *pi, struct ch_sched_params *p) { struct sched_table *s = pi->sched_tbl; struct sched_class *e; u8 class_id; int err; if (!p) return NULL; class_id = p->u.params.class; /* Only accept search for existing class with matching params * or allocation of new class with specified params */ if (class_id != SCHED_CLS_NONE) return NULL; write_lock(&s->rw_lock); /* See if there's an exisiting class with same * requested sched params */ e = t4_sched_class_lookup(pi, p); if (!e) { struct ch_sched_params np; /* Fetch any available unused class */ e = t4_sched_class_lookup(pi, NULL); if (!e) goto out; memset(&np, 0, sizeof(np)); memcpy(&np, p, sizeof(np)); np.u.params.class = e->idx; spin_lock(&e->lock); /* New class */ err = t4_sched_class_fw_cmd(pi, &np, SCHED_FW_OP_ADD); if (err) { spin_unlock(&e->lock); e = NULL; goto out; } memcpy(&e->info, &np, sizeof(e->info)); atomic_set(&e->refcnt, 0); e->state = SCHED_STATE_ACTIVE; spin_unlock(&e->lock); } out: write_unlock(&s->rw_lock); return e; } /** * cxgb4_sched_class_alloc - allocate a scheduling class * @dev: net_device pointer * @p: new scheduling class to create. * * Returns pointer to the scheduling class created. If @p is NULL, then * it allocates and returns any available unused scheduling class. If a * scheduling class with matching @p is found, then the matching class is * returned. */ struct sched_class *cxgb4_sched_class_alloc(struct net_device *dev, struct ch_sched_params *p) { struct port_info *pi = netdev2pinfo(dev); u8 class_id; if (!can_sched(dev)) return NULL; class_id = p->u.params.class; if (!valid_class_id(dev, class_id)) return NULL; return t4_sched_class_alloc(pi, p); } static void t4_sched_class_free(struct port_info *pi, struct sched_class *e) { t4_sched_class_unbind_all(pi, e, SCHED_QUEUE); } struct sched_table *t4_init_sched(unsigned int sched_size) { struct sched_table *s; unsigned int i; s = t4_alloc_mem(sizeof(*s) + sched_size * sizeof(struct sched_class)); if (!s) return NULL; s->sched_size = sched_size; rwlock_init(&s->rw_lock); for (i = 0; i < s->sched_size; i++) { memset(&s->tab[i], 0, sizeof(struct sched_class)); s->tab[i].idx = i; s->tab[i].state = SCHED_STATE_UNUSED; INIT_LIST_HEAD(&s->tab[i].queue_list); spin_lock_init(&s->tab[i].lock); atomic_set(&s->tab[i].refcnt, 0); } return s; } void t4_cleanup_sched(struct adapter *adap) { struct sched_table *s; unsigned int i; for_each_port(adap, i) { struct port_info *pi = netdev2pinfo(adap->port[i]); s = pi->sched_tbl; for (i = 0; i < s->sched_size; i++) { struct sched_class *e; write_lock(&s->rw_lock); e = &s->tab[i]; if (e->state == SCHED_STATE_ACTIVE) t4_sched_class_free(pi, e); write_unlock(&s->rw_lock); } t4_free_mem(s); } } |