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_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_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 init_timer(&qp->rnr_nak_timer); 277 qp->rnr_nak_timer.function = rnr_nak_timer; 278 qp->rnr_nak_timer.data = (unsigned long)qp; 279 280 init_timer(&qp->retrans_timer); 281 qp->retrans_timer.function = retransmit_timer; 282 qp->retrans_timer.data = (unsigned long)qp; 283 qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */ 284 285 return 0; 286 } 287 288 static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp, 289 struct ib_qp_init_attr *init, 290 struct ib_ucontext *context, struct ib_udata *udata) 291 { 292 int err; 293 int wqe_size; 294 295 if (!qp->srq) { 296 qp->rq.max_wr = init->cap.max_recv_wr; 297 qp->rq.max_sge = init->cap.max_recv_sge; 298 299 wqe_size = rcv_wqe_size(qp->rq.max_sge); 300 301 pr_debug("max_wr = %d, max_sge = %d, wqe_size = %d\n", 302 qp->rq.max_wr, qp->rq.max_sge, wqe_size); 303 304 qp->rq.queue = rxe_queue_init(rxe, 305 &qp->rq.max_wr, 306 wqe_size); 307 if (!qp->rq.queue) 308 return -ENOMEM; 309 310 err = do_mmap_info(rxe, udata, false, context, 311 qp->rq.queue->buf, 312 qp->rq.queue->buf_size, 313 &qp->rq.queue->ip); 314 if (err) { 315 kvfree(qp->rq.queue->buf); 316 kfree(qp->rq.queue); 317 return err; 318 } 319 } 320 321 spin_lock_init(&qp->rq.producer_lock); 322 spin_lock_init(&qp->rq.consumer_lock); 323 324 skb_queue_head_init(&qp->resp_pkts); 325 326 rxe_init_task(rxe, &qp->resp.task, qp, 327 rxe_responder, "resp"); 328 329 qp->resp.opcode = OPCODE_NONE; 330 qp->resp.msn = 0; 331 qp->resp.state = QP_STATE_RESET; 332 333 return 0; 334 } 335 336 /* called by the create qp verb */ 337 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd, 338 struct ib_qp_init_attr *init, struct ib_udata *udata, 339 struct ib_pd *ibpd) 340 { 341 int err; 342 struct rxe_cq *rcq = to_rcq(init->recv_cq); 343 struct rxe_cq *scq = to_rcq(init->send_cq); 344 struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL; 345 struct ib_ucontext *context = udata ? ibpd->uobject->context : NULL; 346 347 rxe_add_ref(pd); 348 rxe_add_ref(rcq); 349 rxe_add_ref(scq); 350 if (srq) 351 rxe_add_ref(srq); 352 353 qp->pd = pd; 354 qp->rcq = rcq; 355 qp->scq = scq; 356 qp->srq = srq; 357 358 rxe_qp_init_misc(rxe, qp, init); 359 360 err = rxe_qp_init_req(rxe, qp, init, context, udata); 361 if (err) 362 goto err1; 363 364 err = rxe_qp_init_resp(rxe, qp, init, context, udata); 365 if (err) 366 goto err2; 367 368 qp->attr.qp_state = IB_QPS_RESET; 369 qp->valid = 1; 370 371 return 0; 372 373 err2: 374 rxe_queue_cleanup(qp->sq.queue); 375 err1: 376 if (srq) 377 rxe_drop_ref(srq); 378 rxe_drop_ref(scq); 379 rxe_drop_ref(rcq); 380 rxe_drop_ref(pd); 381 382 return err; 383 } 384 385 /* called by the query qp verb */ 386 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init) 387 { 388 init->event_handler = qp->ibqp.event_handler; 389 init->qp_context = qp->ibqp.qp_context; 390 init->send_cq = qp->ibqp.send_cq; 391 init->recv_cq = qp->ibqp.recv_cq; 392 init->srq = qp->ibqp.srq; 393 394 init->cap.max_send_wr = qp->sq.max_wr; 395 init->cap.max_send_sge = qp->sq.max_sge; 396 init->cap.max_inline_data = qp->sq.max_inline; 397 398 if (!qp->srq) { 399 init->cap.max_recv_wr = qp->rq.max_wr; 400 init->cap.max_recv_sge = qp->rq.max_sge; 401 } 402 403 init->sq_sig_type = qp->sq_sig_type; 404 405 init->qp_type = qp->ibqp.qp_type; 406 init->port_num = 1; 407 408 return 0; 409 } 410 411 /* called by the modify qp verb, this routine checks all the parameters before 412 * making any changes 413 */ 414 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp, 415 struct ib_qp_attr *attr, int mask) 416 { 417 enum ib_qp_state cur_state = (mask & IB_QP_CUR_STATE) ? 418 attr->cur_qp_state : qp->attr.qp_state; 419 enum ib_qp_state new_state = (mask & IB_QP_STATE) ? 420 attr->qp_state : cur_state; 421 422 if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask, 423 IB_LINK_LAYER_ETHERNET)) { 424 pr_warn("invalid mask or state for qp\n"); 425 goto err1; 426 } 427 428 if (mask & IB_QP_STATE) { 429 if (cur_state == IB_QPS_SQD) { 430 if (qp->req.state == QP_STATE_DRAIN && 431 new_state != IB_QPS_ERR) 432 goto err1; 433 } 434 } 435 436 if (mask & IB_QP_PORT) { 437 if (attr->port_num != 1) { 438 pr_warn("invalid port %d\n", attr->port_num); 439 goto err1; 440 } 441 } 442 443 if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq)) 444 goto err1; 445 446 if (mask & IB_QP_AV && rxe_av_chk_attr(rxe, &attr->ah_attr)) 447 goto err1; 448 449 if (mask & IB_QP_ALT_PATH) { 450 if (rxe_av_chk_attr(rxe, &attr->alt_ah_attr)) 451 goto err1; 452 if (attr->alt_port_num != 1) { 453 pr_warn("invalid alt port %d\n", attr->alt_port_num); 454 goto err1; 455 } 456 if (attr->alt_timeout > 31) { 457 pr_warn("invalid QP alt timeout %d > 31\n", 458 attr->alt_timeout); 459 goto err1; 460 } 461 } 462 463 if (mask & IB_QP_PATH_MTU) { 464 struct rxe_port *port = &rxe->port; 465 466 enum ib_mtu max_mtu = port->attr.max_mtu; 467 enum ib_mtu mtu = attr->path_mtu; 468 469 if (mtu > max_mtu) { 470 pr_debug("invalid mtu (%d) > (%d)\n", 471 ib_mtu_enum_to_int(mtu), 472 ib_mtu_enum_to_int(max_mtu)); 473 goto err1; 474 } 475 } 476 477 if (mask & IB_QP_MAX_QP_RD_ATOMIC) { 478 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) { 479 pr_warn("invalid max_rd_atomic %d > %d\n", 480 attr->max_rd_atomic, 481 rxe->attr.max_qp_rd_atom); 482 goto err1; 483 } 484 } 485 486 if (mask & IB_QP_TIMEOUT) { 487 if (attr->timeout > 31) { 488 pr_warn("invalid QP timeout %d > 31\n", 489 attr->timeout); 490 goto err1; 491 } 492 } 493 494 return 0; 495 496 err1: 497 return -EINVAL; 498 } 499 500 /* move the qp to the reset state */ 501 static void rxe_qp_reset(struct rxe_qp *qp) 502 { 503 /* stop tasks from running */ 504 rxe_disable_task(&qp->resp.task); 505 506 /* stop request/comp */ 507 if (qp->sq.queue) { 508 if (qp_type(qp) == IB_QPT_RC) 509 rxe_disable_task(&qp->comp.task); 510 rxe_disable_task(&qp->req.task); 511 } 512 513 /* move qp to the reset state */ 514 qp->req.state = QP_STATE_RESET; 515 qp->resp.state = QP_STATE_RESET; 516 517 /* let state machines reset themselves drain work and packet queues 518 * etc. 519 */ 520 __rxe_do_task(&qp->resp.task); 521 522 if (qp->sq.queue) { 523 __rxe_do_task(&qp->comp.task); 524 __rxe_do_task(&qp->req.task); 525 } 526 527 /* cleanup attributes */ 528 atomic_set(&qp->ssn, 0); 529 qp->req.opcode = -1; 530 qp->req.need_retry = 0; 531 qp->req.noack_pkts = 0; 532 qp->resp.msn = 0; 533 qp->resp.opcode = -1; 534 qp->resp.drop_msg = 0; 535 qp->resp.goto_error = 0; 536 qp->resp.sent_psn_nak = 0; 537 538 if (qp->resp.mr) { 539 rxe_drop_ref(qp->resp.mr); 540 qp->resp.mr = NULL; 541 } 542 543 cleanup_rd_atomic_resources(qp); 544 545 /* reenable tasks */ 546 rxe_enable_task(&qp->resp.task); 547 548 if (qp->sq.queue) { 549 if (qp_type(qp) == IB_QPT_RC) 550 rxe_enable_task(&qp->comp.task); 551 552 rxe_enable_task(&qp->req.task); 553 } 554 } 555 556 /* drain the send queue */ 557 static void rxe_qp_drain(struct rxe_qp *qp) 558 { 559 if (qp->sq.queue) { 560 if (qp->req.state != QP_STATE_DRAINED) { 561 qp->req.state = QP_STATE_DRAIN; 562 if (qp_type(qp) == IB_QPT_RC) 563 rxe_run_task(&qp->comp.task, 1); 564 else 565 __rxe_do_task(&qp->comp.task); 566 rxe_run_task(&qp->req.task, 1); 567 } 568 } 569 } 570 571 /* move the qp to the error state */ 572 void rxe_qp_error(struct rxe_qp *qp) 573 { 574 qp->req.state = QP_STATE_ERROR; 575 qp->resp.state = QP_STATE_ERROR; 576 577 /* drain work and packet queues */ 578 rxe_run_task(&qp->resp.task, 1); 579 580 if (qp_type(qp) == IB_QPT_RC) 581 rxe_run_task(&qp->comp.task, 1); 582 else 583 __rxe_do_task(&qp->comp.task); 584 rxe_run_task(&qp->req.task, 1); 585 } 586 587 /* called by the modify qp verb */ 588 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask, 589 struct ib_udata *udata) 590 { 591 int err; 592 struct rxe_dev *rxe = to_rdev(qp->ibqp.device); 593 union ib_gid sgid; 594 struct ib_gid_attr sgid_attr; 595 596 if (mask & IB_QP_MAX_QP_RD_ATOMIC) { 597 int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic); 598 599 free_rd_atomic_resources(qp); 600 601 err = alloc_rd_atomic_resources(qp, max_rd_atomic); 602 if (err) 603 return err; 604 605 qp->attr.max_rd_atomic = max_rd_atomic; 606 atomic_set(&qp->req.rd_atomic, max_rd_atomic); 607 } 608 609 if (mask & IB_QP_CUR_STATE) 610 qp->attr.cur_qp_state = attr->qp_state; 611 612 if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY) 613 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify; 614 615 if (mask & IB_QP_ACCESS_FLAGS) 616 qp->attr.qp_access_flags = attr->qp_access_flags; 617 618 if (mask & IB_QP_PKEY_INDEX) 619 qp->attr.pkey_index = attr->pkey_index; 620 621 if (mask & IB_QP_PORT) 622 qp->attr.port_num = attr->port_num; 623 624 if (mask & IB_QP_QKEY) 625 qp->attr.qkey = attr->qkey; 626 627 if (mask & IB_QP_AV) { 628 ib_get_cached_gid(&rxe->ib_dev, 1, 629 attr->ah_attr.grh.sgid_index, &sgid, 630 &sgid_attr); 631 rxe_av_from_attr(rxe, attr->port_num, &qp->pri_av, 632 &attr->ah_attr); 633 rxe_av_fill_ip_info(rxe, &qp->pri_av, &attr->ah_attr, 634 &sgid_attr, &sgid); 635 if (sgid_attr.ndev) 636 dev_put(sgid_attr.ndev); 637 } 638 639 if (mask & IB_QP_ALT_PATH) { 640 ib_get_cached_gid(&rxe->ib_dev, 1, 641 attr->alt_ah_attr.grh.sgid_index, &sgid, 642 &sgid_attr); 643 644 rxe_av_from_attr(rxe, attr->alt_port_num, &qp->alt_av, 645 &attr->alt_ah_attr); 646 rxe_av_fill_ip_info(rxe, &qp->alt_av, &attr->alt_ah_attr, 647 &sgid_attr, &sgid); 648 if (sgid_attr.ndev) 649 dev_put(sgid_attr.ndev); 650 651 qp->attr.alt_port_num = attr->alt_port_num; 652 qp->attr.alt_pkey_index = attr->alt_pkey_index; 653 qp->attr.alt_timeout = attr->alt_timeout; 654 } 655 656 if (mask & IB_QP_PATH_MTU) { 657 qp->attr.path_mtu = attr->path_mtu; 658 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu); 659 } 660 661 if (mask & IB_QP_TIMEOUT) { 662 qp->attr.timeout = attr->timeout; 663 if (attr->timeout == 0) { 664 qp->qp_timeout_jiffies = 0; 665 } else { 666 /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */ 667 int j = nsecs_to_jiffies(4096ULL << attr->timeout); 668 669 qp->qp_timeout_jiffies = j ? j : 1; 670 } 671 } 672 673 if (mask & IB_QP_RETRY_CNT) { 674 qp->attr.retry_cnt = attr->retry_cnt; 675 qp->comp.retry_cnt = attr->retry_cnt; 676 pr_debug("set retry count = %d\n", attr->retry_cnt); 677 } 678 679 if (mask & IB_QP_RNR_RETRY) { 680 qp->attr.rnr_retry = attr->rnr_retry; 681 qp->comp.rnr_retry = attr->rnr_retry; 682 pr_debug("set rnr retry count = %d\n", attr->rnr_retry); 683 } 684 685 if (mask & IB_QP_RQ_PSN) { 686 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK); 687 qp->resp.psn = qp->attr.rq_psn; 688 pr_debug("set resp psn = 0x%x\n", qp->resp.psn); 689 } 690 691 if (mask & IB_QP_MIN_RNR_TIMER) { 692 qp->attr.min_rnr_timer = attr->min_rnr_timer; 693 pr_debug("set min rnr timer = 0x%x\n", 694 attr->min_rnr_timer); 695 } 696 697 if (mask & IB_QP_SQ_PSN) { 698 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK); 699 qp->req.psn = qp->attr.sq_psn; 700 qp->comp.psn = qp->attr.sq_psn; 701 pr_debug("set req psn = 0x%x\n", qp->req.psn); 702 } 703 704 if (mask & IB_QP_MAX_DEST_RD_ATOMIC) { 705 qp->attr.max_dest_rd_atomic = 706 __roundup_pow_of_two(attr->max_dest_rd_atomic); 707 } 708 709 if (mask & IB_QP_PATH_MIG_STATE) 710 qp->attr.path_mig_state = attr->path_mig_state; 711 712 if (mask & IB_QP_DEST_QPN) 713 qp->attr.dest_qp_num = attr->dest_qp_num; 714 715 if (mask & IB_QP_STATE) { 716 qp->attr.qp_state = attr->qp_state; 717 718 switch (attr->qp_state) { 719 case IB_QPS_RESET: 720 pr_debug("qp state -> RESET\n"); 721 rxe_qp_reset(qp); 722 break; 723 724 case IB_QPS_INIT: 725 pr_debug("qp state -> INIT\n"); 726 qp->req.state = QP_STATE_INIT; 727 qp->resp.state = QP_STATE_INIT; 728 break; 729 730 case IB_QPS_RTR: 731 pr_debug("qp state -> RTR\n"); 732 qp->resp.state = QP_STATE_READY; 733 break; 734 735 case IB_QPS_RTS: 736 pr_debug("qp state -> RTS\n"); 737 qp->req.state = QP_STATE_READY; 738 break; 739 740 case IB_QPS_SQD: 741 pr_debug("qp state -> SQD\n"); 742 rxe_qp_drain(qp); 743 break; 744 745 case IB_QPS_SQE: 746 pr_warn("qp state -> SQE !!?\n"); 747 /* Not possible from modify_qp. */ 748 break; 749 750 case IB_QPS_ERR: 751 pr_debug("qp state -> ERR\n"); 752 rxe_qp_error(qp); 753 break; 754 } 755 } 756 757 return 0; 758 } 759 760 /* called by the query qp verb */ 761 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask) 762 { 763 struct rxe_dev *rxe = to_rdev(qp->ibqp.device); 764 765 *attr = qp->attr; 766 767 attr->rq_psn = qp->resp.psn; 768 attr->sq_psn = qp->req.psn; 769 770 attr->cap.max_send_wr = qp->sq.max_wr; 771 attr->cap.max_send_sge = qp->sq.max_sge; 772 attr->cap.max_inline_data = qp->sq.max_inline; 773 774 if (!qp->srq) { 775 attr->cap.max_recv_wr = qp->rq.max_wr; 776 attr->cap.max_recv_sge = qp->rq.max_sge; 777 } 778 779 rxe_av_to_attr(rxe, &qp->pri_av, &attr->ah_attr); 780 rxe_av_to_attr(rxe, &qp->alt_av, &attr->alt_ah_attr); 781 782 if (qp->req.state == QP_STATE_DRAIN) { 783 attr->sq_draining = 1; 784 /* applications that get this state 785 * typically spin on it. yield the 786 * processor 787 */ 788 cond_resched(); 789 } else { 790 attr->sq_draining = 0; 791 } 792 793 pr_debug("attr->sq_draining = %d\n", attr->sq_draining); 794 795 return 0; 796 } 797 798 /* called by the destroy qp verb */ 799 void rxe_qp_destroy(struct rxe_qp *qp) 800 { 801 qp->valid = 0; 802 qp->qp_timeout_jiffies = 0; 803 rxe_cleanup_task(&qp->resp.task); 804 805 del_timer_sync(&qp->retrans_timer); 806 del_timer_sync(&qp->rnr_nak_timer); 807 808 rxe_cleanup_task(&qp->req.task); 809 if (qp_type(qp) == IB_QPT_RC) 810 rxe_cleanup_task(&qp->comp.task); 811 812 /* flush out any receive wr's or pending requests */ 813 __rxe_do_task(&qp->req.task); 814 if (qp->sq.queue) { 815 __rxe_do_task(&qp->comp.task); 816 __rxe_do_task(&qp->req.task); 817 } 818 } 819 820 /* called when the last reference to the qp is dropped */ 821 void rxe_qp_cleanup(void *arg) 822 { 823 struct rxe_qp *qp = arg; 824 825 rxe_drop_all_mcast_groups(qp); 826 827 if (qp->sq.queue) 828 rxe_queue_cleanup(qp->sq.queue); 829 830 if (qp->srq) 831 rxe_drop_ref(qp->srq); 832 833 if (qp->rq.queue) 834 rxe_queue_cleanup(qp->rq.queue); 835 836 if (qp->scq) 837 rxe_drop_ref(qp->scq); 838 if (qp->rcq) 839 rxe_drop_ref(qp->rcq); 840 if (qp->pd) 841 rxe_drop_ref(qp->pd); 842 843 if (qp->resp.mr) { 844 rxe_drop_ref(qp->resp.mr); 845 qp->resp.mr = NULL; 846 } 847 848 free_rd_atomic_resources(qp); 849 850 kernel_sock_shutdown(qp->sk, SHUT_RDWR); 851 } 852