1 /* 2 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. 3 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. 4 * 5 * This software is available to you under a choice of one of two 6 * licenses. You may choose to be licensed under the terms of the GNU 7 * General Public License (GPL) Version 2, available from the file 8 * COPYING in the main directory of this source tree, or the 9 * OpenIB.org BSD license below: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * - Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * - Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34 #include <linux/skbuff.h> 35 #include <linux/delay.h> 36 #include <linux/sched.h> 37 38 #include "rxe.h" 39 #include "rxe_loc.h" 40 #include "rxe_queue.h" 41 #include "rxe_task.h" 42 43 char *rxe_qp_state_name[] = { 44 [QP_STATE_RESET] = "RESET", 45 [QP_STATE_INIT] = "INIT", 46 [QP_STATE_READY] = "READY", 47 [QP_STATE_DRAIN] = "DRAIN", 48 [QP_STATE_DRAINED] = "DRAINED", 49 [QP_STATE_ERROR] = "ERROR", 50 }; 51 52 static int rxe_qp_chk_cap(struct rxe_dev *rxe, struct ib_qp_cap *cap, 53 int has_srq) 54 { 55 if (cap->max_send_wr > rxe->attr.max_qp_wr) { 56 pr_warn("invalid send wr = %d > %d\n", 57 cap->max_send_wr, rxe->attr.max_qp_wr); 58 goto err1; 59 } 60 61 if (cap->max_send_sge > rxe->attr.max_sge) { 62 pr_warn("invalid send sge = %d > %d\n", 63 cap->max_send_sge, rxe->attr.max_sge); 64 goto err1; 65 } 66 67 if (!has_srq) { 68 if (cap->max_recv_wr > rxe->attr.max_qp_wr) { 69 pr_warn("invalid recv wr = %d > %d\n", 70 cap->max_recv_wr, rxe->attr.max_qp_wr); 71 goto err1; 72 } 73 74 if (cap->max_recv_sge > rxe->attr.max_sge) { 75 pr_warn("invalid recv sge = %d > %d\n", 76 cap->max_recv_sge, rxe->attr.max_sge); 77 goto err1; 78 } 79 } 80 81 if (cap->max_inline_data > rxe->max_inline_data) { 82 pr_warn("invalid max inline data = %d > %d\n", 83 cap->max_inline_data, rxe->max_inline_data); 84 goto err1; 85 } 86 87 return 0; 88 89 err1: 90 return -EINVAL; 91 } 92 93 int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init) 94 { 95 struct ib_qp_cap *cap = &init->cap; 96 struct rxe_port *port; 97 int port_num = init->port_num; 98 99 if (!init->recv_cq || !init->send_cq) { 100 pr_warn("missing cq\n"); 101 goto err1; 102 } 103 104 if (rxe_qp_chk_cap(rxe, cap, !!init->srq)) 105 goto err1; 106 107 if (init->qp_type == IB_QPT_SMI || init->qp_type == IB_QPT_GSI) { 108 if (port_num != 1) { 109 pr_warn("invalid port = %d\n", port_num); 110 goto err1; 111 } 112 113 port = &rxe->port; 114 115 if (init->qp_type == IB_QPT_SMI && port->qp_smi_index) { 116 pr_warn("SMI QP exists for port %d\n", port_num); 117 goto err1; 118 } 119 120 if (init->qp_type == IB_QPT_GSI && port->qp_gsi_index) { 121 pr_warn("GSI QP exists for port %d\n", port_num); 122 goto err1; 123 } 124 } 125 126 return 0; 127 128 err1: 129 return -EINVAL; 130 } 131 132 static int alloc_rd_atomic_resources(struct rxe_qp *qp, unsigned int n) 133 { 134 qp->resp.res_head = 0; 135 qp->resp.res_tail = 0; 136 qp->resp.resources = kcalloc(n, sizeof(struct resp_res), GFP_KERNEL); 137 138 if (!qp->resp.resources) 139 return -ENOMEM; 140 141 return 0; 142 } 143 144 static void free_rd_atomic_resources(struct rxe_qp *qp) 145 { 146 if (qp->resp.resources) { 147 int i; 148 149 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) { 150 struct resp_res *res = &qp->resp.resources[i]; 151 152 free_rd_atomic_resource(qp, res); 153 } 154 kfree(qp->resp.resources); 155 qp->resp.resources = NULL; 156 } 157 } 158 159 void free_rd_atomic_resource(struct rxe_qp *qp, struct resp_res *res) 160 { 161 if (res->type == RXE_ATOMIC_MASK) { 162 rxe_drop_ref(qp); 163 kfree_skb(res->atomic.skb); 164 } else if (res->type == RXE_READ_MASK) { 165 if (res->read.mr) 166 rxe_drop_ref(res->read.mr); 167 } 168 res->type = 0; 169 } 170 171 static void cleanup_rd_atomic_resources(struct rxe_qp *qp) 172 { 173 int i; 174 struct resp_res *res; 175 176 if (qp->resp.resources) { 177 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) { 178 res = &qp->resp.resources[i]; 179 free_rd_atomic_resource(qp, res); 180 } 181 } 182 } 183 184 static void rxe_qp_init_misc(struct rxe_dev *rxe, struct rxe_qp *qp, 185 struct ib_qp_init_attr *init) 186 { 187 struct rxe_port *port; 188 u32 qpn; 189 190 qp->sq_sig_type = init->sq_sig_type; 191 qp->attr.path_mtu = 1; 192 qp->mtu = ib_mtu_enum_to_int(qp->attr.path_mtu); 193 194 qpn = qp->pelem.index; 195 port = &rxe->port; 196 197 switch (init->qp_type) { 198 case IB_QPT_SMI: 199 qp->ibqp.qp_num = 0; 200 port->qp_smi_index = qpn; 201 qp->attr.port_num = init->port_num; 202 break; 203 204 case IB_QPT_GSI: 205 qp->ibqp.qp_num = 1; 206 port->qp_gsi_index = qpn; 207 qp->attr.port_num = init->port_num; 208 break; 209 210 default: 211 qp->ibqp.qp_num = qpn; 212 break; 213 } 214 215 INIT_LIST_HEAD(&qp->grp_list); 216 217 skb_queue_head_init(&qp->send_pkts); 218 219 spin_lock_init(&qp->grp_lock); 220 spin_lock_init(&qp->state_lock); 221 222 atomic_set(&qp->ssn, 0); 223 atomic_set(&qp->skb_out, 0); 224 } 225 226 static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp, 227 struct ib_qp_init_attr *init, 228 struct ib_ucontext *context, struct ib_udata *udata) 229 { 230 int err; 231 int wqe_size; 232 233 err = sock_create_kern(&init_net, AF_INET, SOCK_DGRAM, 0, &qp->sk); 234 if (err < 0) 235 return err; 236 qp->sk->sk->sk_user_data = qp; 237 238 qp->sq.max_wr = init->cap.max_send_wr; 239 qp->sq.max_sge = init->cap.max_send_sge; 240 qp->sq.max_inline = init->cap.max_inline_data; 241 242 wqe_size = max_t(int, sizeof(struct rxe_send_wqe) + 243 qp->sq.max_sge * sizeof(struct ib_sge), 244 sizeof(struct rxe_send_wqe) + 245 qp->sq.max_inline); 246 247 qp->sq.queue = rxe_queue_init(rxe, 248 &qp->sq.max_wr, 249 wqe_size); 250 if (!qp->sq.queue) 251 return -ENOMEM; 252 253 err = do_mmap_info(rxe, udata, true, 254 context, qp->sq.queue->buf, 255 qp->sq.queue->buf_size, &qp->sq.queue->ip); 256 257 if (err) { 258 kvfree(qp->sq.queue->buf); 259 kfree(qp->sq.queue); 260 return err; 261 } 262 263 qp->req.wqe_index = producer_index(qp->sq.queue); 264 qp->req.state = QP_STATE_RESET; 265 qp->req.opcode = -1; 266 qp->comp.opcode = -1; 267 268 spin_lock_init(&qp->sq.sq_lock); 269 skb_queue_head_init(&qp->req_pkts); 270 271 rxe_init_task(rxe, &qp->req.task, qp, 272 rxe_requester, "req"); 273 rxe_init_task(rxe, &qp->comp.task, qp, 274 rxe_completer, "comp"); 275 276 setup_timer(&qp->rnr_nak_timer, rnr_nak_timer, (unsigned long)qp); 277 setup_timer(&qp->retrans_timer, retransmit_timer, (unsigned long)qp); 278 qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */ 279 280 return 0; 281 } 282 283 static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp, 284 struct ib_qp_init_attr *init, 285 struct ib_ucontext *context, struct ib_udata *udata) 286 { 287 int err; 288 int wqe_size; 289 290 if (!qp->srq) { 291 qp->rq.max_wr = init->cap.max_recv_wr; 292 qp->rq.max_sge = init->cap.max_recv_sge; 293 294 wqe_size = rcv_wqe_size(qp->rq.max_sge); 295 296 pr_debug("qp#%d max_wr = %d, max_sge = %d, wqe_size = %d\n", 297 qp_num(qp), qp->rq.max_wr, qp->rq.max_sge, wqe_size); 298 299 qp->rq.queue = rxe_queue_init(rxe, 300 &qp->rq.max_wr, 301 wqe_size); 302 if (!qp->rq.queue) 303 return -ENOMEM; 304 305 err = do_mmap_info(rxe, udata, false, context, 306 qp->rq.queue->buf, 307 qp->rq.queue->buf_size, 308 &qp->rq.queue->ip); 309 if (err) { 310 kvfree(qp->rq.queue->buf); 311 kfree(qp->rq.queue); 312 return err; 313 } 314 } 315 316 spin_lock_init(&qp->rq.producer_lock); 317 spin_lock_init(&qp->rq.consumer_lock); 318 319 skb_queue_head_init(&qp->resp_pkts); 320 321 rxe_init_task(rxe, &qp->resp.task, qp, 322 rxe_responder, "resp"); 323 324 qp->resp.opcode = OPCODE_NONE; 325 qp->resp.msn = 0; 326 qp->resp.state = QP_STATE_RESET; 327 328 return 0; 329 } 330 331 /* called by the create qp verb */ 332 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd, 333 struct ib_qp_init_attr *init, struct ib_udata *udata, 334 struct ib_pd *ibpd) 335 { 336 int err; 337 struct rxe_cq *rcq = to_rcq(init->recv_cq); 338 struct rxe_cq *scq = to_rcq(init->send_cq); 339 struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL; 340 struct ib_ucontext *context = udata ? ibpd->uobject->context : NULL; 341 342 rxe_add_ref(pd); 343 rxe_add_ref(rcq); 344 rxe_add_ref(scq); 345 if (srq) 346 rxe_add_ref(srq); 347 348 qp->pd = pd; 349 qp->rcq = rcq; 350 qp->scq = scq; 351 qp->srq = srq; 352 353 rxe_qp_init_misc(rxe, qp, init); 354 355 err = rxe_qp_init_req(rxe, qp, init, context, udata); 356 if (err) 357 goto err1; 358 359 err = rxe_qp_init_resp(rxe, qp, init, context, udata); 360 if (err) 361 goto err2; 362 363 qp->attr.qp_state = IB_QPS_RESET; 364 qp->valid = 1; 365 366 return 0; 367 368 err2: 369 rxe_queue_cleanup(qp->sq.queue); 370 err1: 371 if (srq) 372 rxe_drop_ref(srq); 373 rxe_drop_ref(scq); 374 rxe_drop_ref(rcq); 375 rxe_drop_ref(pd); 376 377 return err; 378 } 379 380 /* called by the query qp verb */ 381 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init) 382 { 383 init->event_handler = qp->ibqp.event_handler; 384 init->qp_context = qp->ibqp.qp_context; 385 init->send_cq = qp->ibqp.send_cq; 386 init->recv_cq = qp->ibqp.recv_cq; 387 init->srq = qp->ibqp.srq; 388 389 init->cap.max_send_wr = qp->sq.max_wr; 390 init->cap.max_send_sge = qp->sq.max_sge; 391 init->cap.max_inline_data = qp->sq.max_inline; 392 393 if (!qp->srq) { 394 init->cap.max_recv_wr = qp->rq.max_wr; 395 init->cap.max_recv_sge = qp->rq.max_sge; 396 } 397 398 init->sq_sig_type = qp->sq_sig_type; 399 400 init->qp_type = qp->ibqp.qp_type; 401 init->port_num = 1; 402 403 return 0; 404 } 405 406 /* called by the modify qp verb, this routine checks all the parameters before 407 * making any changes 408 */ 409 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp, 410 struct ib_qp_attr *attr, int mask) 411 { 412 enum ib_qp_state cur_state = (mask & IB_QP_CUR_STATE) ? 413 attr->cur_qp_state : qp->attr.qp_state; 414 enum ib_qp_state new_state = (mask & IB_QP_STATE) ? 415 attr->qp_state : cur_state; 416 417 if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask, 418 IB_LINK_LAYER_ETHERNET)) { 419 pr_warn("invalid mask or state for qp\n"); 420 goto err1; 421 } 422 423 if (mask & IB_QP_STATE) { 424 if (cur_state == IB_QPS_SQD) { 425 if (qp->req.state == QP_STATE_DRAIN && 426 new_state != IB_QPS_ERR) 427 goto err1; 428 } 429 } 430 431 if (mask & IB_QP_PORT) { 432 if (attr->port_num != 1) { 433 pr_warn("invalid port %d\n", attr->port_num); 434 goto err1; 435 } 436 } 437 438 if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq)) 439 goto err1; 440 441 if (mask & IB_QP_AV && rxe_av_chk_attr(rxe, &attr->ah_attr)) 442 goto err1; 443 444 if (mask & IB_QP_ALT_PATH) { 445 if (rxe_av_chk_attr(rxe, &attr->alt_ah_attr)) 446 goto err1; 447 if (attr->alt_port_num != 1) { 448 pr_warn("invalid alt port %d\n", attr->alt_port_num); 449 goto err1; 450 } 451 if (attr->alt_timeout > 31) { 452 pr_warn("invalid QP alt timeout %d > 31\n", 453 attr->alt_timeout); 454 goto err1; 455 } 456 } 457 458 if (mask & IB_QP_PATH_MTU) { 459 struct rxe_port *port = &rxe->port; 460 461 enum ib_mtu max_mtu = port->attr.max_mtu; 462 enum ib_mtu mtu = attr->path_mtu; 463 464 if (mtu > max_mtu) { 465 pr_debug("invalid mtu (%d) > (%d)\n", 466 ib_mtu_enum_to_int(mtu), 467 ib_mtu_enum_to_int(max_mtu)); 468 goto err1; 469 } 470 } 471 472 if (mask & IB_QP_MAX_QP_RD_ATOMIC) { 473 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) { 474 pr_warn("invalid max_rd_atomic %d > %d\n", 475 attr->max_rd_atomic, 476 rxe->attr.max_qp_rd_atom); 477 goto err1; 478 } 479 } 480 481 if (mask & IB_QP_TIMEOUT) { 482 if (attr->timeout > 31) { 483 pr_warn("invalid QP timeout %d > 31\n", 484 attr->timeout); 485 goto err1; 486 } 487 } 488 489 return 0; 490 491 err1: 492 return -EINVAL; 493 } 494 495 /* move the qp to the reset state */ 496 static void rxe_qp_reset(struct rxe_qp *qp) 497 { 498 /* stop tasks from running */ 499 rxe_disable_task(&qp->resp.task); 500 501 /* stop request/comp */ 502 if (qp->sq.queue) { 503 if (qp_type(qp) == IB_QPT_RC) 504 rxe_disable_task(&qp->comp.task); 505 rxe_disable_task(&qp->req.task); 506 } 507 508 /* move qp to the reset state */ 509 qp->req.state = QP_STATE_RESET; 510 qp->resp.state = QP_STATE_RESET; 511 512 /* let state machines reset themselves drain work and packet queues 513 * etc. 514 */ 515 __rxe_do_task(&qp->resp.task); 516 517 if (qp->sq.queue) { 518 __rxe_do_task(&qp->comp.task); 519 __rxe_do_task(&qp->req.task); 520 rxe_queue_reset(qp->sq.queue); 521 } 522 523 /* cleanup attributes */ 524 atomic_set(&qp->ssn, 0); 525 qp->req.opcode = -1; 526 qp->req.need_retry = 0; 527 qp->req.noack_pkts = 0; 528 qp->resp.msn = 0; 529 qp->resp.opcode = -1; 530 qp->resp.drop_msg = 0; 531 qp->resp.goto_error = 0; 532 qp->resp.sent_psn_nak = 0; 533 534 if (qp->resp.mr) { 535 rxe_drop_ref(qp->resp.mr); 536 qp->resp.mr = NULL; 537 } 538 539 cleanup_rd_atomic_resources(qp); 540 541 /* reenable tasks */ 542 rxe_enable_task(&qp->resp.task); 543 544 if (qp->sq.queue) { 545 if (qp_type(qp) == IB_QPT_RC) 546 rxe_enable_task(&qp->comp.task); 547 548 rxe_enable_task(&qp->req.task); 549 } 550 } 551 552 /* drain the send queue */ 553 static void rxe_qp_drain(struct rxe_qp *qp) 554 { 555 if (qp->sq.queue) { 556 if (qp->req.state != QP_STATE_DRAINED) { 557 qp->req.state = QP_STATE_DRAIN; 558 if (qp_type(qp) == IB_QPT_RC) 559 rxe_run_task(&qp->comp.task, 1); 560 else 561 __rxe_do_task(&qp->comp.task); 562 rxe_run_task(&qp->req.task, 1); 563 } 564 } 565 } 566 567 /* move the qp to the error state */ 568 void rxe_qp_error(struct rxe_qp *qp) 569 { 570 qp->req.state = QP_STATE_ERROR; 571 qp->resp.state = QP_STATE_ERROR; 572 qp->attr.qp_state = IB_QPS_ERR; 573 574 /* drain work and packet queues */ 575 rxe_run_task(&qp->resp.task, 1); 576 577 if (qp_type(qp) == IB_QPT_RC) 578 rxe_run_task(&qp->comp.task, 1); 579 else 580 __rxe_do_task(&qp->comp.task); 581 rxe_run_task(&qp->req.task, 1); 582 } 583 584 /* called by the modify qp verb */ 585 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask, 586 struct ib_udata *udata) 587 { 588 int err; 589 struct rxe_dev *rxe = to_rdev(qp->ibqp.device); 590 union ib_gid sgid; 591 struct ib_gid_attr sgid_attr; 592 593 if (mask & IB_QP_MAX_QP_RD_ATOMIC) { 594 int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic); 595 596 qp->attr.max_rd_atomic = max_rd_atomic; 597 atomic_set(&qp->req.rd_atomic, max_rd_atomic); 598 } 599 600 if (mask & IB_QP_MAX_DEST_RD_ATOMIC) { 601 int max_dest_rd_atomic = 602 __roundup_pow_of_two(attr->max_dest_rd_atomic); 603 604 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic; 605 606 free_rd_atomic_resources(qp); 607 608 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic); 609 if (err) 610 return err; 611 } 612 613 if (mask & IB_QP_CUR_STATE) 614 qp->attr.cur_qp_state = attr->qp_state; 615 616 if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY) 617 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify; 618 619 if (mask & IB_QP_ACCESS_FLAGS) 620 qp->attr.qp_access_flags = attr->qp_access_flags; 621 622 if (mask & IB_QP_PKEY_INDEX) 623 qp->attr.pkey_index = attr->pkey_index; 624 625 if (mask & IB_QP_PORT) 626 qp->attr.port_num = attr->port_num; 627 628 if (mask & IB_QP_QKEY) 629 qp->attr.qkey = attr->qkey; 630 631 if (mask & IB_QP_AV) { 632 ib_get_cached_gid(&rxe->ib_dev, 1, 633 attr->ah_attr.grh.sgid_index, &sgid, 634 &sgid_attr); 635 rxe_av_from_attr(rxe, attr->port_num, &qp->pri_av, 636 &attr->ah_attr); 637 rxe_av_fill_ip_info(rxe, &qp->pri_av, &attr->ah_attr, 638 &sgid_attr, &sgid); 639 if (sgid_attr.ndev) 640 dev_put(sgid_attr.ndev); 641 } 642 643 if (mask & IB_QP_ALT_PATH) { 644 ib_get_cached_gid(&rxe->ib_dev, 1, 645 attr->alt_ah_attr.grh.sgid_index, &sgid, 646 &sgid_attr); 647 648 rxe_av_from_attr(rxe, attr->alt_port_num, &qp->alt_av, 649 &attr->alt_ah_attr); 650 rxe_av_fill_ip_info(rxe, &qp->alt_av, &attr->alt_ah_attr, 651 &sgid_attr, &sgid); 652 if (sgid_attr.ndev) 653 dev_put(sgid_attr.ndev); 654 655 qp->attr.alt_port_num = attr->alt_port_num; 656 qp->attr.alt_pkey_index = attr->alt_pkey_index; 657 qp->attr.alt_timeout = attr->alt_timeout; 658 } 659 660 if (mask & IB_QP_PATH_MTU) { 661 qp->attr.path_mtu = attr->path_mtu; 662 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu); 663 } 664 665 if (mask & IB_QP_TIMEOUT) { 666 qp->attr.timeout = attr->timeout; 667 if (attr->timeout == 0) { 668 qp->qp_timeout_jiffies = 0; 669 } else { 670 /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */ 671 int j = nsecs_to_jiffies(4096ULL << attr->timeout); 672 673 qp->qp_timeout_jiffies = j ? j : 1; 674 } 675 } 676 677 if (mask & IB_QP_RETRY_CNT) { 678 qp->attr.retry_cnt = attr->retry_cnt; 679 qp->comp.retry_cnt = attr->retry_cnt; 680 pr_debug("qp#%d set retry count = %d\n", qp_num(qp), 681 attr->retry_cnt); 682 } 683 684 if (mask & IB_QP_RNR_RETRY) { 685 qp->attr.rnr_retry = attr->rnr_retry; 686 qp->comp.rnr_retry = attr->rnr_retry; 687 pr_debug("qp#%d set rnr retry count = %d\n", qp_num(qp), 688 attr->rnr_retry); 689 } 690 691 if (mask & IB_QP_RQ_PSN) { 692 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK); 693 qp->resp.psn = qp->attr.rq_psn; 694 pr_debug("qp#%d set resp psn = 0x%x\n", qp_num(qp), 695 qp->resp.psn); 696 } 697 698 if (mask & IB_QP_MIN_RNR_TIMER) { 699 qp->attr.min_rnr_timer = attr->min_rnr_timer; 700 pr_debug("qp#%d set min rnr timer = 0x%x\n", qp_num(qp), 701 attr->min_rnr_timer); 702 } 703 704 if (mask & IB_QP_SQ_PSN) { 705 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK); 706 qp->req.psn = qp->attr.sq_psn; 707 qp->comp.psn = qp->attr.sq_psn; 708 pr_debug("qp#%d set req psn = 0x%x\n", qp_num(qp), qp->req.psn); 709 } 710 711 if (mask & IB_QP_PATH_MIG_STATE) 712 qp->attr.path_mig_state = attr->path_mig_state; 713 714 if (mask & IB_QP_DEST_QPN) 715 qp->attr.dest_qp_num = attr->dest_qp_num; 716 717 if (mask & IB_QP_STATE) { 718 qp->attr.qp_state = attr->qp_state; 719 720 switch (attr->qp_state) { 721 case IB_QPS_RESET: 722 pr_debug("qp#%d state -> RESET\n", qp_num(qp)); 723 rxe_qp_reset(qp); 724 break; 725 726 case IB_QPS_INIT: 727 pr_debug("qp#%d state -> INIT\n", qp_num(qp)); 728 qp->req.state = QP_STATE_INIT; 729 qp->resp.state = QP_STATE_INIT; 730 break; 731 732 case IB_QPS_RTR: 733 pr_debug("qp#%d state -> RTR\n", qp_num(qp)); 734 qp->resp.state = QP_STATE_READY; 735 break; 736 737 case IB_QPS_RTS: 738 pr_debug("qp#%d state -> RTS\n", qp_num(qp)); 739 qp->req.state = QP_STATE_READY; 740 break; 741 742 case IB_QPS_SQD: 743 pr_debug("qp#%d state -> SQD\n", qp_num(qp)); 744 rxe_qp_drain(qp); 745 break; 746 747 case IB_QPS_SQE: 748 pr_warn("qp#%d state -> SQE !!?\n", qp_num(qp)); 749 /* Not possible from modify_qp. */ 750 break; 751 752 case IB_QPS_ERR: 753 pr_debug("qp#%d state -> ERR\n", qp_num(qp)); 754 rxe_qp_error(qp); 755 break; 756 } 757 } 758 759 return 0; 760 } 761 762 /* called by the query qp verb */ 763 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask) 764 { 765 struct rxe_dev *rxe = to_rdev(qp->ibqp.device); 766 767 *attr = qp->attr; 768 769 attr->rq_psn = qp->resp.psn; 770 attr->sq_psn = qp->req.psn; 771 772 attr->cap.max_send_wr = qp->sq.max_wr; 773 attr->cap.max_send_sge = qp->sq.max_sge; 774 attr->cap.max_inline_data = qp->sq.max_inline; 775 776 if (!qp->srq) { 777 attr->cap.max_recv_wr = qp->rq.max_wr; 778 attr->cap.max_recv_sge = qp->rq.max_sge; 779 } 780 781 rxe_av_to_attr(rxe, &qp->pri_av, &attr->ah_attr); 782 rxe_av_to_attr(rxe, &qp->alt_av, &attr->alt_ah_attr); 783 784 if (qp->req.state == QP_STATE_DRAIN) { 785 attr->sq_draining = 1; 786 /* applications that get this state 787 * typically spin on it. yield the 788 * processor 789 */ 790 cond_resched(); 791 } else { 792 attr->sq_draining = 0; 793 } 794 795 pr_debug("attr->sq_draining = %d\n", attr->sq_draining); 796 797 return 0; 798 } 799 800 /* called by the destroy qp verb */ 801 void rxe_qp_destroy(struct rxe_qp *qp) 802 { 803 qp->valid = 0; 804 qp->qp_timeout_jiffies = 0; 805 rxe_cleanup_task(&qp->resp.task); 806 807 del_timer_sync(&qp->retrans_timer); 808 del_timer_sync(&qp->rnr_nak_timer); 809 810 rxe_cleanup_task(&qp->req.task); 811 rxe_cleanup_task(&qp->comp.task); 812 813 /* flush out any receive wr's or pending requests */ 814 __rxe_do_task(&qp->req.task); 815 if (qp->sq.queue) { 816 __rxe_do_task(&qp->comp.task); 817 __rxe_do_task(&qp->req.task); 818 } 819 } 820 821 /* called when the last reference to the qp is dropped */ 822 void rxe_qp_cleanup(struct rxe_pool_entry *arg) 823 { 824 struct rxe_qp *qp = container_of(arg, typeof(*qp), pelem); 825 826 rxe_drop_all_mcast_groups(qp); 827 828 if (qp->sq.queue) 829 rxe_queue_cleanup(qp->sq.queue); 830 831 if (qp->srq) 832 rxe_drop_ref(qp->srq); 833 834 if (qp->rq.queue) 835 rxe_queue_cleanup(qp->rq.queue); 836 837 if (qp->scq) 838 rxe_drop_ref(qp->scq); 839 if (qp->rcq) 840 rxe_drop_ref(qp->rcq); 841 if (qp->pd) 842 rxe_drop_ref(qp->pd); 843 844 if (qp->resp.mr) { 845 rxe_drop_ref(qp->resp.mr); 846 qp->resp.mr = NULL; 847 } 848 849 free_rd_atomic_resources(qp); 850 851 kernel_sock_shutdown(qp->sk, SHUT_RDWR); 852 sock_release(qp->sk); 853 } 854