1 /*- 2 * Copyright (c) 2010-2011 Solarflare Communications, Inc. 3 * All rights reserved. 4 * 5 * This software was developed in part by Philip Paeps under contract for 6 * Solarflare Communications, Inc. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/kernel.h> 35 #include <sys/malloc.h> 36 #include <sys/param.h> 37 #include <sys/queue.h> 38 #include <sys/systm.h> 39 #include <sys/taskqueue.h> 40 41 #include "common/efx.h" 42 43 #include "sfxge.h" 44 45 static void 46 sfxge_ev_qcomplete(struct sfxge_evq *evq, boolean_t eop) 47 { 48 struct sfxge_softc *sc; 49 unsigned int index; 50 struct sfxge_rxq *rxq; 51 struct sfxge_txq *txq; 52 53 sc = evq->sc; 54 index = evq->index; 55 rxq = sc->rxq[index]; 56 57 if ((txq = evq->txq) != NULL) { 58 evq->txq = NULL; 59 evq->txqs = &(evq->txq); 60 61 do { 62 struct sfxge_txq *next; 63 64 next = txq->next; 65 txq->next = NULL; 66 67 KASSERT(txq->evq_index == index, 68 ("txq->evq_index != index")); 69 70 if (txq->pending != txq->completed) 71 sfxge_tx_qcomplete(txq); 72 73 txq = next; 74 } while (txq != NULL); 75 } 76 77 if (rxq->pending != rxq->completed) 78 sfxge_rx_qcomplete(rxq, eop); 79 } 80 81 static boolean_t 82 sfxge_ev_rx(void *arg, uint32_t label, uint32_t id, uint32_t size, 83 uint16_t flags) 84 { 85 struct sfxge_evq *evq; 86 struct sfxge_softc *sc; 87 struct sfxge_rxq *rxq; 88 unsigned int expected; 89 struct sfxge_rx_sw_desc *rx_desc; 90 91 evq = arg; 92 sc = evq->sc; 93 94 if (evq->exception) 95 goto done; 96 97 rxq = sc->rxq[label]; 98 KASSERT(rxq != NULL, ("rxq == NULL")); 99 KASSERT(evq->index == rxq->index, 100 ("evq->index != rxq->index")); 101 102 if (rxq->init_state != SFXGE_RXQ_STARTED) 103 goto done; 104 105 expected = rxq->pending++ & (SFXGE_NDESCS - 1); 106 if (id != expected) { 107 evq->exception = B_TRUE; 108 109 device_printf(sc->dev, "RX completion out of order" 110 " (id=%#x expected=%#x flags=%#x); resetting\n", 111 id, expected, flags); 112 sfxge_schedule_reset(sc); 113 114 goto done; 115 } 116 117 rx_desc = &rxq->queue[id]; 118 119 KASSERT(rx_desc->flags == EFX_DISCARD, 120 ("rx_desc->flags != EFX_DISCARD")); 121 rx_desc->flags = flags; 122 123 KASSERT(size < (1 << 16), ("size > (1 << 16)")); 124 rx_desc->size = (uint16_t)size; 125 prefetch_read_many(rx_desc->mbuf); 126 127 evq->rx_done++; 128 129 if (rxq->pending - rxq->completed >= SFXGE_RX_BATCH) 130 sfxge_ev_qcomplete(evq, B_FALSE); 131 132 done: 133 return (evq->rx_done >= SFXGE_EV_BATCH); 134 } 135 136 static boolean_t 137 sfxge_ev_exception(void *arg, uint32_t code, uint32_t data) 138 { 139 struct sfxge_evq *evq; 140 struct sfxge_softc *sc; 141 142 evq = (struct sfxge_evq *)arg; 143 sc = evq->sc; 144 145 evq->exception = B_TRUE; 146 147 if (code != EFX_EXCEPTION_UNKNOWN_SENSOREVT) { 148 device_printf(sc->dev, 149 "hardware exception (code=%u); resetting\n", 150 code); 151 sfxge_schedule_reset(sc); 152 } 153 154 return (B_FALSE); 155 } 156 157 static boolean_t 158 sfxge_ev_rxq_flush_done(void *arg, uint32_t rxq_index) 159 { 160 struct sfxge_evq *evq; 161 struct sfxge_softc *sc; 162 struct sfxge_rxq *rxq; 163 unsigned int index; 164 unsigned int label; 165 uint16_t magic; 166 167 evq = (struct sfxge_evq *)arg; 168 sc = evq->sc; 169 rxq = sc->rxq[rxq_index]; 170 171 KASSERT(rxq != NULL, ("rxq == NULL")); 172 173 /* Resend a software event on the correct queue */ 174 index = rxq->index; 175 evq = sc->evq[index]; 176 177 label = rxq_index; 178 KASSERT((label & SFXGE_MAGIC_DMAQ_LABEL_MASK) == label, 179 ("(label & SFXGE_MAGIC_DMAQ_LABEL_MASK) != level")); 180 magic = SFXGE_MAGIC_RX_QFLUSH_DONE | label; 181 182 KASSERT(evq->init_state == SFXGE_EVQ_STARTED, 183 ("evq not started")); 184 efx_ev_qpost(evq->common, magic); 185 186 return (B_FALSE); 187 } 188 189 static boolean_t 190 sfxge_ev_rxq_flush_failed(void *arg, uint32_t rxq_index) 191 { 192 struct sfxge_evq *evq; 193 struct sfxge_softc *sc; 194 struct sfxge_rxq *rxq; 195 unsigned int index; 196 unsigned int label; 197 uint16_t magic; 198 199 evq = (struct sfxge_evq *)arg; 200 sc = evq->sc; 201 rxq = sc->rxq[rxq_index]; 202 203 KASSERT(rxq != NULL, ("rxq == NULL")); 204 205 /* Resend a software event on the correct queue */ 206 index = rxq->index; 207 evq = sc->evq[index]; 208 209 label = rxq_index; 210 KASSERT((label & SFXGE_MAGIC_DMAQ_LABEL_MASK) == label, 211 ("(label & SFXGE_MAGIC_DMAQ_LABEL_MASK) != label")); 212 magic = SFXGE_MAGIC_RX_QFLUSH_FAILED | label; 213 214 KASSERT(evq->init_state == SFXGE_EVQ_STARTED, 215 ("evq not started")); 216 efx_ev_qpost(evq->common, magic); 217 218 return (B_FALSE); 219 } 220 221 static struct sfxge_txq * 222 sfxge_get_txq_by_label(struct sfxge_evq *evq, enum sfxge_txq_type label) 223 { 224 unsigned int index; 225 226 KASSERT((evq->index == 0 && label < SFXGE_TXQ_NTYPES) || 227 (label == SFXGE_TXQ_IP_TCP_UDP_CKSUM), ("unexpected txq label")); 228 index = (evq->index == 0) ? label : (evq->index - 1 + SFXGE_TXQ_NTYPES); 229 return evq->sc->txq[index]; 230 } 231 232 static boolean_t 233 sfxge_ev_tx(void *arg, uint32_t label, uint32_t id) 234 { 235 struct sfxge_evq *evq; 236 struct sfxge_txq *txq; 237 unsigned int stop; 238 unsigned int delta; 239 240 evq = (struct sfxge_evq *)arg; 241 txq = sfxge_get_txq_by_label(evq, label); 242 243 KASSERT(txq != NULL, ("txq == NULL")); 244 KASSERT(evq->index == txq->evq_index, 245 ("evq->index != txq->evq_index")); 246 247 if (txq->init_state != SFXGE_TXQ_STARTED) 248 goto done; 249 250 stop = (id + 1) & (SFXGE_NDESCS - 1); 251 id = txq->pending & (SFXGE_NDESCS - 1); 252 253 delta = (stop >= id) ? (stop - id) : (SFXGE_NDESCS - id + stop); 254 txq->pending += delta; 255 256 evq->tx_done++; 257 258 if (txq->next == NULL && 259 evq->txqs != &(txq->next)) { 260 *(evq->txqs) = txq; 261 evq->txqs = &(txq->next); 262 } 263 264 if (txq->pending - txq->completed >= SFXGE_TX_BATCH) 265 sfxge_tx_qcomplete(txq); 266 267 done: 268 return (evq->tx_done >= SFXGE_EV_BATCH); 269 } 270 271 static boolean_t 272 sfxge_ev_txq_flush_done(void *arg, uint32_t txq_index) 273 { 274 struct sfxge_evq *evq; 275 struct sfxge_softc *sc; 276 struct sfxge_txq *txq; 277 unsigned int label; 278 uint16_t magic; 279 280 evq = (struct sfxge_evq *)arg; 281 sc = evq->sc; 282 txq = sc->txq[txq_index]; 283 284 KASSERT(txq != NULL, ("txq == NULL")); 285 KASSERT(txq->init_state == SFXGE_TXQ_INITIALIZED, 286 ("txq not initialized")); 287 288 /* Resend a software event on the correct queue */ 289 evq = sc->evq[txq->evq_index]; 290 291 label = txq->type; 292 KASSERT((label & SFXGE_MAGIC_DMAQ_LABEL_MASK) == label, 293 ("(label & SFXGE_MAGIC_DMAQ_LABEL_MASK) != label")); 294 magic = SFXGE_MAGIC_TX_QFLUSH_DONE | label; 295 296 KASSERT(evq->init_state == SFXGE_EVQ_STARTED, 297 ("evq not started")); 298 efx_ev_qpost(evq->common, magic); 299 300 return (B_FALSE); 301 } 302 303 static boolean_t 304 sfxge_ev_software(void *arg, uint16_t magic) 305 { 306 struct sfxge_evq *evq; 307 struct sfxge_softc *sc; 308 unsigned int label; 309 310 evq = (struct sfxge_evq *)arg; 311 sc = evq->sc; 312 313 label = magic & SFXGE_MAGIC_DMAQ_LABEL_MASK; 314 magic &= ~SFXGE_MAGIC_DMAQ_LABEL_MASK; 315 316 switch (magic) { 317 case SFXGE_MAGIC_RX_QFLUSH_DONE: { 318 struct sfxge_rxq *rxq = sc->rxq[label]; 319 320 KASSERT(rxq != NULL, ("rxq == NULL")); 321 KASSERT(evq->index == rxq->index, 322 ("evq->index != rxq->index")); 323 324 sfxge_rx_qflush_done(rxq); 325 break; 326 } 327 case SFXGE_MAGIC_RX_QFLUSH_FAILED: { 328 struct sfxge_rxq *rxq = sc->rxq[label]; 329 330 KASSERT(rxq != NULL, ("rxq == NULL")); 331 KASSERT(evq->index == rxq->index, 332 ("evq->index != rxq->index")); 333 334 sfxge_rx_qflush_failed(rxq); 335 break; 336 } 337 case SFXGE_MAGIC_RX_QREFILL: { 338 struct sfxge_rxq *rxq = sc->rxq[label]; 339 340 KASSERT(rxq != NULL, ("rxq == NULL")); 341 KASSERT(evq->index == rxq->index, 342 ("evq->index != rxq->index")); 343 344 sfxge_rx_qrefill(rxq); 345 break; 346 } 347 case SFXGE_MAGIC_TX_QFLUSH_DONE: { 348 struct sfxge_txq *txq = sfxge_get_txq_by_label(evq, label); 349 350 KASSERT(txq != NULL, ("txq == NULL")); 351 KASSERT(evq->index == txq->evq_index, 352 ("evq->index != txq->evq_index")); 353 354 sfxge_tx_qflush_done(txq); 355 break; 356 } 357 default: 358 break; 359 } 360 361 return (B_FALSE); 362 } 363 364 static boolean_t 365 sfxge_ev_sram(void *arg, uint32_t code) 366 { 367 (void)arg; 368 (void)code; 369 370 switch (code) { 371 case EFX_SRAM_UPDATE: 372 EFSYS_PROBE(sram_update); 373 break; 374 375 case EFX_SRAM_CLEAR: 376 EFSYS_PROBE(sram_clear); 377 break; 378 379 case EFX_SRAM_ILLEGAL_CLEAR: 380 EFSYS_PROBE(sram_illegal_clear); 381 break; 382 383 default: 384 KASSERT(B_FALSE, ("Impossible SRAM event")); 385 break; 386 } 387 388 return (B_FALSE); 389 } 390 391 static boolean_t 392 sfxge_ev_timer(void *arg, uint32_t index) 393 { 394 (void)arg; 395 (void)index; 396 397 return (B_FALSE); 398 } 399 400 static boolean_t 401 sfxge_ev_wake_up(void *arg, uint32_t index) 402 { 403 (void)arg; 404 (void)index; 405 406 return (B_FALSE); 407 } 408 409 static void 410 sfxge_ev_stat_update(struct sfxge_softc *sc) 411 { 412 struct sfxge_evq *evq; 413 unsigned int index; 414 clock_t now; 415 416 sx_xlock(&sc->softc_lock); 417 418 if (sc->evq[0]->init_state != SFXGE_EVQ_STARTED) 419 goto out; 420 421 now = ticks; 422 if (now - sc->ev_stats_update_time < hz) 423 goto out; 424 425 sc->ev_stats_update_time = now; 426 427 /* Add event counts from each event queue in turn */ 428 for (index = 0; index < sc->intr.n_alloc; index++) { 429 evq = sc->evq[index]; 430 mtx_lock(&evq->lock); 431 efx_ev_qstats_update(evq->common, sc->ev_stats); 432 mtx_unlock(&evq->lock); 433 } 434 out: 435 sx_xunlock(&sc->softc_lock); 436 } 437 438 static int 439 sfxge_ev_stat_handler(SYSCTL_HANDLER_ARGS) 440 { 441 struct sfxge_softc *sc = arg1; 442 unsigned int id = arg2; 443 444 sfxge_ev_stat_update(sc); 445 446 return SYSCTL_OUT(req, &sc->ev_stats[id], sizeof(sc->ev_stats[id])); 447 } 448 449 static void 450 sfxge_ev_stat_init(struct sfxge_softc *sc) 451 { 452 struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->dev); 453 struct sysctl_oid_list *stat_list; 454 unsigned int id; 455 char name[40]; 456 457 stat_list = SYSCTL_CHILDREN(sc->stats_node); 458 459 for (id = 0; id < EV_NQSTATS; id++) { 460 snprintf(name, sizeof(name), "ev_%s", 461 efx_ev_qstat_name(sc->enp, id)); 462 SYSCTL_ADD_PROC( 463 ctx, stat_list, 464 OID_AUTO, name, CTLTYPE_U64|CTLFLAG_RD, 465 sc, id, sfxge_ev_stat_handler, "Q", 466 ""); 467 } 468 } 469 470 static void 471 sfxge_ev_qmoderate(struct sfxge_softc *sc, unsigned int idx, unsigned int us) 472 { 473 struct sfxge_evq *evq; 474 efx_evq_t *eep; 475 476 evq = sc->evq[idx]; 477 eep = evq->common; 478 479 KASSERT(evq->init_state == SFXGE_EVQ_STARTED, 480 ("evq->init_state != SFXGE_EVQ_STARTED")); 481 482 (void)efx_ev_qmoderate(eep, us); 483 } 484 485 static int 486 sfxge_int_mod_handler(SYSCTL_HANDLER_ARGS) 487 { 488 struct sfxge_softc *sc = arg1; 489 struct sfxge_intr *intr = &sc->intr; 490 unsigned int moderation; 491 int error; 492 int index; 493 494 sx_xlock(&sc->softc_lock); 495 496 if (req->newptr) { 497 if ((error = SYSCTL_IN(req, &moderation, sizeof(moderation))) 498 != 0) 499 goto out; 500 501 /* We may not be calling efx_ev_qmoderate() now, 502 * so we have to range-check the value ourselves. 503 */ 504 if (moderation > 505 efx_nic_cfg_get(sc->enp)->enc_evq_moderation_max) { 506 error = EINVAL; 507 goto out; 508 } 509 510 sc->ev_moderation = moderation; 511 if (intr->state == SFXGE_INTR_STARTED) { 512 for (index = 0; index < intr->n_alloc; index++) 513 sfxge_ev_qmoderate(sc, index, moderation); 514 } 515 } else { 516 error = SYSCTL_OUT(req, &sc->ev_moderation, 517 sizeof(sc->ev_moderation)); 518 } 519 520 out: 521 sx_xunlock(&sc->softc_lock); 522 523 return error; 524 } 525 526 static boolean_t 527 sfxge_ev_initialized(void *arg) 528 { 529 struct sfxge_evq *evq; 530 531 evq = (struct sfxge_evq *)arg; 532 533 KASSERT(evq->init_state == SFXGE_EVQ_STARTING, 534 ("evq not starting")); 535 536 evq->init_state = SFXGE_EVQ_STARTED; 537 538 return (0); 539 } 540 541 static boolean_t 542 sfxge_ev_link_change(void *arg, efx_link_mode_t link_mode) 543 { 544 struct sfxge_evq *evq; 545 struct sfxge_softc *sc; 546 547 evq = (struct sfxge_evq *)arg; 548 sc = evq->sc; 549 550 sfxge_mac_link_update(sc, link_mode); 551 552 return (0); 553 } 554 555 static const efx_ev_callbacks_t sfxge_ev_callbacks = { 556 .eec_initialized = sfxge_ev_initialized, 557 .eec_rx = sfxge_ev_rx, 558 .eec_tx = sfxge_ev_tx, 559 .eec_exception = sfxge_ev_exception, 560 .eec_rxq_flush_done = sfxge_ev_rxq_flush_done, 561 .eec_rxq_flush_failed = sfxge_ev_rxq_flush_failed, 562 .eec_txq_flush_done = sfxge_ev_txq_flush_done, 563 .eec_software = sfxge_ev_software, 564 .eec_sram = sfxge_ev_sram, 565 .eec_wake_up = sfxge_ev_wake_up, 566 .eec_timer = sfxge_ev_timer, 567 .eec_link_change = sfxge_ev_link_change, 568 }; 569 570 571 int 572 sfxge_ev_qpoll(struct sfxge_softc *sc, unsigned int index) 573 { 574 struct sfxge_evq *evq; 575 int rc; 576 577 evq = sc->evq[index]; 578 579 mtx_lock(&evq->lock); 580 581 if (evq->init_state != SFXGE_EVQ_STARTING && 582 evq->init_state != SFXGE_EVQ_STARTED) { 583 rc = EINVAL; 584 goto fail; 585 } 586 587 /* Synchronize the DMA memory for reading */ 588 bus_dmamap_sync(evq->mem.esm_tag, evq->mem.esm_map, 589 BUS_DMASYNC_POSTREAD); 590 591 KASSERT(evq->rx_done == 0, ("evq->rx_done != 0")); 592 KASSERT(evq->tx_done == 0, ("evq->tx_done != 0")); 593 KASSERT(evq->txq == NULL, ("evq->txq != NULL")); 594 KASSERT(evq->txqs == &evq->txq, ("evq->txqs != &evq->txq")); 595 596 /* Poll the queue */ 597 efx_ev_qpoll(evq->common, &evq->read_ptr, &sfxge_ev_callbacks, evq); 598 599 evq->rx_done = 0; 600 evq->tx_done = 0; 601 602 /* Perform any pending completion processing */ 603 sfxge_ev_qcomplete(evq, B_TRUE); 604 605 /* Re-prime the event queue for interrupts */ 606 if ((rc = efx_ev_qprime(evq->common, evq->read_ptr)) != 0) 607 goto fail; 608 609 mtx_unlock(&evq->lock); 610 611 return (0); 612 613 fail: 614 mtx_unlock(&(evq->lock)); 615 return (rc); 616 } 617 618 static void 619 sfxge_ev_qstop(struct sfxge_softc *sc, unsigned int index) 620 { 621 struct sfxge_evq *evq; 622 623 evq = sc->evq[index]; 624 625 KASSERT(evq->init_state == SFXGE_EVQ_STARTED, 626 ("evq->init_state != SFXGE_EVQ_STARTED")); 627 628 mtx_lock(&evq->lock); 629 evq->init_state = SFXGE_EVQ_INITIALIZED; 630 evq->read_ptr = 0; 631 evq->exception = B_FALSE; 632 633 /* Add event counts before discarding the common evq state */ 634 efx_ev_qstats_update(evq->common, sc->ev_stats); 635 636 efx_ev_qdestroy(evq->common); 637 efx_sram_buf_tbl_clear(sc->enp, evq->buf_base_id, 638 EFX_EVQ_NBUFS(SFXGE_NEVS)); 639 mtx_unlock(&evq->lock); 640 } 641 642 static int 643 sfxge_ev_qstart(struct sfxge_softc *sc, unsigned int index) 644 { 645 struct sfxge_evq *evq; 646 efsys_mem_t *esmp; 647 int count; 648 int rc; 649 650 evq = sc->evq[index]; 651 esmp = &evq->mem; 652 653 KASSERT(evq->init_state == SFXGE_EVQ_INITIALIZED, 654 ("evq->init_state != SFXGE_EVQ_INITIALIZED")); 655 656 /* Clear all events. */ 657 (void)memset(esmp->esm_base, 0xff, EFX_EVQ_SIZE(SFXGE_NEVS)); 658 659 /* Program the buffer table. */ 660 if ((rc = efx_sram_buf_tbl_set(sc->enp, evq->buf_base_id, esmp, 661 EFX_EVQ_NBUFS(SFXGE_NEVS))) != 0) 662 return rc; 663 664 /* Create the common code event queue. */ 665 if ((rc = efx_ev_qcreate(sc->enp, index, esmp, SFXGE_NEVS, 666 evq->buf_base_id, &evq->common)) != 0) 667 goto fail; 668 669 mtx_lock(&evq->lock); 670 671 /* Set the default moderation */ 672 (void)efx_ev_qmoderate(evq->common, sc->ev_moderation); 673 674 /* Prime the event queue for interrupts */ 675 if ((rc = efx_ev_qprime(evq->common, evq->read_ptr)) != 0) 676 goto fail2; 677 678 evq->init_state = SFXGE_EVQ_STARTING; 679 680 mtx_unlock(&evq->lock); 681 682 /* Wait for the initialization event */ 683 count = 0; 684 do { 685 /* Pause for 100 ms */ 686 pause("sfxge evq init", hz / 10); 687 688 /* Check to see if the test event has been processed */ 689 if (evq->init_state == SFXGE_EVQ_STARTED) 690 goto done; 691 692 } while (++count < 20); 693 694 rc = ETIMEDOUT; 695 goto fail3; 696 697 done: 698 return (0); 699 700 fail3: 701 mtx_lock(&evq->lock); 702 evq->init_state = SFXGE_EVQ_INITIALIZED; 703 fail2: 704 mtx_unlock(&evq->lock); 705 efx_ev_qdestroy(evq->common); 706 fail: 707 efx_sram_buf_tbl_clear(sc->enp, evq->buf_base_id, 708 EFX_EVQ_NBUFS(SFXGE_NEVS)); 709 710 return (rc); 711 } 712 713 void 714 sfxge_ev_stop(struct sfxge_softc *sc) 715 { 716 struct sfxge_intr *intr; 717 efx_nic_t *enp; 718 int index; 719 720 intr = &sc->intr; 721 enp = sc->enp; 722 723 KASSERT(intr->state == SFXGE_INTR_STARTED, 724 ("Interrupts not started")); 725 726 /* Stop the event queue(s) */ 727 index = intr->n_alloc; 728 while (--index >= 0) 729 sfxge_ev_qstop(sc, index); 730 731 /* Tear down the event module */ 732 efx_ev_fini(enp); 733 } 734 735 int 736 sfxge_ev_start(struct sfxge_softc *sc) 737 { 738 struct sfxge_intr *intr; 739 int index; 740 int rc; 741 742 intr = &sc->intr; 743 744 KASSERT(intr->state == SFXGE_INTR_STARTED, 745 ("intr->state != SFXGE_INTR_STARTED")); 746 747 /* Initialize the event module */ 748 if ((rc = efx_ev_init(sc->enp)) != 0) 749 return rc; 750 751 /* Start the event queues */ 752 for (index = 0; index < intr->n_alloc; index++) { 753 if ((rc = sfxge_ev_qstart(sc, index)) != 0) 754 goto fail; 755 } 756 757 return (0); 758 759 fail: 760 /* Stop the event queue(s) */ 761 while (--index >= 0) 762 sfxge_ev_qstop(sc, index); 763 764 /* Tear down the event module */ 765 efx_ev_fini(sc->enp); 766 767 return (rc); 768 } 769 770 static void 771 sfxge_ev_qfini(struct sfxge_softc *sc, unsigned int index) 772 { 773 struct sfxge_evq *evq; 774 775 evq = sc->evq[index]; 776 777 KASSERT(evq->init_state == SFXGE_EVQ_INITIALIZED, 778 ("evq->init_state != SFXGE_EVQ_INITIALIZED")); 779 KASSERT(evq->txqs == &evq->txq, ("evq->txqs != &evq->txq")); 780 781 sfxge_dma_free(&evq->mem); 782 783 sc->evq[index] = NULL; 784 785 mtx_destroy(&evq->lock); 786 787 free(evq, M_SFXGE); 788 } 789 790 static int 791 sfxge_ev_qinit(struct sfxge_softc *sc, unsigned int index) 792 { 793 struct sfxge_evq *evq; 794 efsys_mem_t *esmp; 795 int rc; 796 797 KASSERT(index < SFXGE_RX_SCALE_MAX, ("index >= SFXGE_RX_SCALE_MAX")); 798 799 evq = malloc(sizeof(struct sfxge_evq), M_SFXGE, M_ZERO | M_WAITOK); 800 evq->sc = sc; 801 evq->index = index; 802 sc->evq[index] = evq; 803 esmp = &evq->mem; 804 805 /* Initialise TX completion list */ 806 evq->txqs = &evq->txq; 807 808 /* Allocate DMA space. */ 809 if ((rc = sfxge_dma_alloc(sc, EFX_EVQ_SIZE(SFXGE_NEVS), esmp)) != 0) 810 return (rc); 811 812 /* Allocate buffer table entries. */ 813 sfxge_sram_buf_tbl_alloc(sc, EFX_EVQ_NBUFS(SFXGE_NEVS), 814 &evq->buf_base_id); 815 816 mtx_init(&evq->lock, "evq", NULL, MTX_DEF); 817 818 evq->init_state = SFXGE_EVQ_INITIALIZED; 819 820 return (0); 821 } 822 823 void 824 sfxge_ev_fini(struct sfxge_softc *sc) 825 { 826 struct sfxge_intr *intr; 827 int index; 828 829 intr = &sc->intr; 830 831 KASSERT(intr->state == SFXGE_INTR_INITIALIZED, 832 ("intr->state != SFXGE_INTR_INITIALIZED")); 833 834 sc->ev_moderation = 0; 835 836 /* Tear down the event queue(s). */ 837 index = intr->n_alloc; 838 while (--index >= 0) 839 sfxge_ev_qfini(sc, index); 840 } 841 842 int 843 sfxge_ev_init(struct sfxge_softc *sc) 844 { 845 struct sysctl_ctx_list *sysctl_ctx = device_get_sysctl_ctx(sc->dev); 846 struct sysctl_oid *sysctl_tree = device_get_sysctl_tree(sc->dev); 847 struct sfxge_intr *intr; 848 int index; 849 int rc; 850 851 intr = &sc->intr; 852 853 KASSERT(intr->state == SFXGE_INTR_INITIALIZED, 854 ("intr->state != SFXGE_INTR_INITIALIZED")); 855 856 /* Set default interrupt moderation; add a sysctl to 857 * read and change it. 858 */ 859 sc->ev_moderation = 30; 860 SYSCTL_ADD_PROC(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree), 861 OID_AUTO, "int_mod", CTLTYPE_UINT|CTLFLAG_RW, 862 sc, 0, sfxge_int_mod_handler, "IU", 863 "sfxge interrupt moderation (us)"); 864 865 /* 866 * Initialize the event queue(s) - one per interrupt. 867 */ 868 for (index = 0; index < intr->n_alloc; index++) { 869 if ((rc = sfxge_ev_qinit(sc, index)) != 0) 870 goto fail; 871 } 872 873 sfxge_ev_stat_init(sc); 874 875 return (0); 876 877 fail: 878 while (--index >= 0) 879 sfxge_ev_qfini(sc, index); 880 881 return (rc); 882 } 883