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 qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */ 277 if (init->qp_type == IB_QPT_RC) { 278 setup_timer(&qp->rnr_nak_timer, rnr_nak_timer, (unsigned long)qp); 279 setup_timer(&qp->retrans_timer, retransmit_timer, (unsigned long)qp); 280 } 281 return 0; 282 } 283 284 static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp, 285 struct ib_qp_init_attr *init, 286 struct ib_ucontext *context, struct ib_udata *udata) 287 { 288 int err; 289 int wqe_size; 290 291 if (!qp->srq) { 292 qp->rq.max_wr = init->cap.max_recv_wr; 293 qp->rq.max_sge = init->cap.max_recv_sge; 294 295 wqe_size = rcv_wqe_size(qp->rq.max_sge); 296 297 pr_debug("qp#%d max_wr = %d, max_sge = %d, wqe_size = %d\n", 298 qp_num(qp), qp->rq.max_wr, qp->rq.max_sge, wqe_size); 299 300 qp->rq.queue = rxe_queue_init(rxe, 301 &qp->rq.max_wr, 302 wqe_size); 303 if (!qp->rq.queue) 304 return -ENOMEM; 305 306 err = do_mmap_info(rxe, udata, false, context, 307 qp->rq.queue->buf, 308 qp->rq.queue->buf_size, 309 &qp->rq.queue->ip); 310 if (err) { 311 kvfree(qp->rq.queue->buf); 312 kfree(qp->rq.queue); 313 return err; 314 } 315 } 316 317 spin_lock_init(&qp->rq.producer_lock); 318 spin_lock_init(&qp->rq.consumer_lock); 319 320 skb_queue_head_init(&qp->resp_pkts); 321 322 rxe_init_task(rxe, &qp->resp.task, qp, 323 rxe_responder, "resp"); 324 325 qp->resp.opcode = OPCODE_NONE; 326 qp->resp.msn = 0; 327 qp->resp.state = QP_STATE_RESET; 328 329 return 0; 330 } 331 332 /* called by the create qp verb */ 333 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd, 334 struct ib_qp_init_attr *init, struct ib_udata *udata, 335 struct ib_pd *ibpd) 336 { 337 int err; 338 struct rxe_cq *rcq = to_rcq(init->recv_cq); 339 struct rxe_cq *scq = to_rcq(init->send_cq); 340 struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL; 341 struct ib_ucontext *context = udata ? ibpd->uobject->context : NULL; 342 343 rxe_add_ref(pd); 344 rxe_add_ref(rcq); 345 rxe_add_ref(scq); 346 if (srq) 347 rxe_add_ref(srq); 348 349 qp->pd = pd; 350 qp->rcq = rcq; 351 qp->scq = scq; 352 qp->srq = srq; 353 354 rxe_qp_init_misc(rxe, qp, init); 355 356 err = rxe_qp_init_req(rxe, qp, init, context, udata); 357 if (err) 358 goto err1; 359 360 err = rxe_qp_init_resp(rxe, qp, init, context, udata); 361 if (err) 362 goto err2; 363 364 qp->attr.qp_state = IB_QPS_RESET; 365 qp->valid = 1; 366 367 return 0; 368 369 err2: 370 rxe_queue_cleanup(qp->sq.queue); 371 err1: 372 if (srq) 373 rxe_drop_ref(srq); 374 rxe_drop_ref(scq); 375 rxe_drop_ref(rcq); 376 rxe_drop_ref(pd); 377 378 return err; 379 } 380 381 /* called by the query qp verb */ 382 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init) 383 { 384 init->event_handler = qp->ibqp.event_handler; 385 init->qp_context = qp->ibqp.qp_context; 386 init->send_cq = qp->ibqp.send_cq; 387 init->recv_cq = qp->ibqp.recv_cq; 388 init->srq = qp->ibqp.srq; 389 390 init->cap.max_send_wr = qp->sq.max_wr; 391 init->cap.max_send_sge = qp->sq.max_sge; 392 init->cap.max_inline_data = qp->sq.max_inline; 393 394 if (!qp->srq) { 395 init->cap.max_recv_wr = qp->rq.max_wr; 396 init->cap.max_recv_sge = qp->rq.max_sge; 397 } 398 399 init->sq_sig_type = qp->sq_sig_type; 400 401 init->qp_type = qp->ibqp.qp_type; 402 init->port_num = 1; 403 404 return 0; 405 } 406 407 /* called by the modify qp verb, this routine checks all the parameters before 408 * making any changes 409 */ 410 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp, 411 struct ib_qp_attr *attr, int mask) 412 { 413 enum ib_qp_state cur_state = (mask & IB_QP_CUR_STATE) ? 414 attr->cur_qp_state : qp->attr.qp_state; 415 enum ib_qp_state new_state = (mask & IB_QP_STATE) ? 416 attr->qp_state : cur_state; 417 418 if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask, 419 IB_LINK_LAYER_ETHERNET)) { 420 pr_warn("invalid mask or state for qp\n"); 421 goto err1; 422 } 423 424 if (mask & IB_QP_STATE) { 425 if (cur_state == IB_QPS_SQD) { 426 if (qp->req.state == QP_STATE_DRAIN && 427 new_state != IB_QPS_ERR) 428 goto err1; 429 } 430 } 431 432 if (mask & IB_QP_PORT) { 433 if (attr->port_num != 1) { 434 pr_warn("invalid port %d\n", attr->port_num); 435 goto err1; 436 } 437 } 438 439 if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq)) 440 goto err1; 441 442 if (mask & IB_QP_AV && rxe_av_chk_attr(rxe, &attr->ah_attr)) 443 goto err1; 444 445 if (mask & IB_QP_ALT_PATH) { 446 if (rxe_av_chk_attr(rxe, &attr->alt_ah_attr)) 447 goto err1; 448 if (attr->alt_port_num != 1) { 449 pr_warn("invalid alt port %d\n", attr->alt_port_num); 450 goto err1; 451 } 452 if (attr->alt_timeout > 31) { 453 pr_warn("invalid QP alt timeout %d > 31\n", 454 attr->alt_timeout); 455 goto err1; 456 } 457 } 458 459 if (mask & IB_QP_PATH_MTU) { 460 struct rxe_port *port = &rxe->port; 461 462 enum ib_mtu max_mtu = port->attr.max_mtu; 463 enum ib_mtu mtu = attr->path_mtu; 464 465 if (mtu > max_mtu) { 466 pr_debug("invalid mtu (%d) > (%d)\n", 467 ib_mtu_enum_to_int(mtu), 468 ib_mtu_enum_to_int(max_mtu)); 469 goto err1; 470 } 471 } 472 473 if (mask & IB_QP_MAX_QP_RD_ATOMIC) { 474 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) { 475 pr_warn("invalid max_rd_atomic %d > %d\n", 476 attr->max_rd_atomic, 477 rxe->attr.max_qp_rd_atom); 478 goto err1; 479 } 480 } 481 482 if (mask & IB_QP_TIMEOUT) { 483 if (attr->timeout > 31) { 484 pr_warn("invalid QP timeout %d > 31\n", 485 attr->timeout); 486 goto err1; 487 } 488 } 489 490 return 0; 491 492 err1: 493 return -EINVAL; 494 } 495 496 /* move the qp to the reset state */ 497 static void rxe_qp_reset(struct rxe_qp *qp) 498 { 499 /* stop tasks from running */ 500 rxe_disable_task(&qp->resp.task); 501 502 /* stop request/comp */ 503 if (qp->sq.queue) { 504 if (qp_type(qp) == IB_QPT_RC) 505 rxe_disable_task(&qp->comp.task); 506 rxe_disable_task(&qp->req.task); 507 } 508 509 /* move qp to the reset state */ 510 qp->req.state = QP_STATE_RESET; 511 qp->resp.state = QP_STATE_RESET; 512 513 /* let state machines reset themselves drain work and packet queues 514 * etc. 515 */ 516 __rxe_do_task(&qp->resp.task); 517 518 if (qp->sq.queue) { 519 __rxe_do_task(&qp->comp.task); 520 __rxe_do_task(&qp->req.task); 521 rxe_queue_reset(qp->sq.queue); 522 } 523 524 /* cleanup attributes */ 525 atomic_set(&qp->ssn, 0); 526 qp->req.opcode = -1; 527 qp->req.need_retry = 0; 528 qp->req.noack_pkts = 0; 529 qp->resp.msn = 0; 530 qp->resp.opcode = -1; 531 qp->resp.drop_msg = 0; 532 qp->resp.goto_error = 0; 533 qp->resp.sent_psn_nak = 0; 534 535 if (qp->resp.mr) { 536 rxe_drop_ref(qp->resp.mr); 537 qp->resp.mr = NULL; 538 } 539 540 cleanup_rd_atomic_resources(qp); 541 542 /* reenable tasks */ 543 rxe_enable_task(&qp->resp.task); 544 545 if (qp->sq.queue) { 546 if (qp_type(qp) == IB_QPT_RC) 547 rxe_enable_task(&qp->comp.task); 548 549 rxe_enable_task(&qp->req.task); 550 } 551 } 552 553 /* drain the send queue */ 554 static void rxe_qp_drain(struct rxe_qp *qp) 555 { 556 if (qp->sq.queue) { 557 if (qp->req.state != QP_STATE_DRAINED) { 558 qp->req.state = QP_STATE_DRAIN; 559 if (qp_type(qp) == IB_QPT_RC) 560 rxe_run_task(&qp->comp.task, 1); 561 else 562 __rxe_do_task(&qp->comp.task); 563 rxe_run_task(&qp->req.task, 1); 564 } 565 } 566 } 567 568 /* move the qp to the error state */ 569 void rxe_qp_error(struct rxe_qp *qp) 570 { 571 qp->req.state = QP_STATE_ERROR; 572 qp->resp.state = QP_STATE_ERROR; 573 qp->attr.qp_state = IB_QPS_ERR; 574 575 /* drain work and packet queues */ 576 rxe_run_task(&qp->resp.task, 1); 577 578 if (qp_type(qp) == IB_QPT_RC) 579 rxe_run_task(&qp->comp.task, 1); 580 else 581 __rxe_do_task(&qp->comp.task); 582 rxe_run_task(&qp->req.task, 1); 583 } 584 585 /* called by the modify qp verb */ 586 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask, 587 struct ib_udata *udata) 588 { 589 int err; 590 struct rxe_dev *rxe = to_rdev(qp->ibqp.device); 591 union ib_gid sgid; 592 struct ib_gid_attr sgid_attr; 593 594 if (mask & IB_QP_MAX_QP_RD_ATOMIC) { 595 int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic); 596 597 qp->attr.max_rd_atomic = max_rd_atomic; 598 atomic_set(&qp->req.rd_atomic, max_rd_atomic); 599 } 600 601 if (mask & IB_QP_MAX_DEST_RD_ATOMIC) { 602 int max_dest_rd_atomic = 603 __roundup_pow_of_two(attr->max_dest_rd_atomic); 604 605 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic; 606 607 free_rd_atomic_resources(qp); 608 609 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic); 610 if (err) 611 return err; 612 } 613 614 if (mask & IB_QP_CUR_STATE) 615 qp->attr.cur_qp_state = attr->qp_state; 616 617 if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY) 618 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify; 619 620 if (mask & IB_QP_ACCESS_FLAGS) 621 qp->attr.qp_access_flags = attr->qp_access_flags; 622 623 if (mask & IB_QP_PKEY_INDEX) 624 qp->attr.pkey_index = attr->pkey_index; 625 626 if (mask & IB_QP_PORT) 627 qp->attr.port_num = attr->port_num; 628 629 if (mask & IB_QP_QKEY) 630 qp->attr.qkey = attr->qkey; 631 632 if (mask & IB_QP_AV) { 633 ib_get_cached_gid(&rxe->ib_dev, 1, 634 rdma_ah_read_grh(&attr->ah_attr)->sgid_index, 635 &sgid, &sgid_attr); 636 rxe_av_from_attr(rxe, attr->port_num, &qp->pri_av, 637 &attr->ah_attr); 638 rxe_av_fill_ip_info(rxe, &qp->pri_av, &attr->ah_attr, 639 &sgid_attr, &sgid); 640 if (sgid_attr.ndev) 641 dev_put(sgid_attr.ndev); 642 } 643 644 if (mask & IB_QP_ALT_PATH) { 645 u8 sgid_index = 646 rdma_ah_read_grh(&attr->alt_ah_attr)->sgid_index; 647 648 ib_get_cached_gid(&rxe->ib_dev, 1, sgid_index, 649 &sgid, &sgid_attr); 650 651 rxe_av_from_attr(rxe, attr->alt_port_num, &qp->alt_av, 652 &attr->alt_ah_attr); 653 rxe_av_fill_ip_info(rxe, &qp->alt_av, &attr->alt_ah_attr, 654 &sgid_attr, &sgid); 655 if (sgid_attr.ndev) 656 dev_put(sgid_attr.ndev); 657 658 qp->attr.alt_port_num = attr->alt_port_num; 659 qp->attr.alt_pkey_index = attr->alt_pkey_index; 660 qp->attr.alt_timeout = attr->alt_timeout; 661 } 662 663 if (mask & IB_QP_PATH_MTU) { 664 qp->attr.path_mtu = attr->path_mtu; 665 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu); 666 } 667 668 if (mask & IB_QP_TIMEOUT) { 669 qp->attr.timeout = attr->timeout; 670 if (attr->timeout == 0) { 671 qp->qp_timeout_jiffies = 0; 672 } else { 673 /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */ 674 int j = nsecs_to_jiffies(4096ULL << attr->timeout); 675 676 qp->qp_timeout_jiffies = j ? j : 1; 677 } 678 } 679 680 if (mask & IB_QP_RETRY_CNT) { 681 qp->attr.retry_cnt = attr->retry_cnt; 682 qp->comp.retry_cnt = attr->retry_cnt; 683 pr_debug("qp#%d set retry count = %d\n", qp_num(qp), 684 attr->retry_cnt); 685 } 686 687 if (mask & IB_QP_RNR_RETRY) { 688 qp->attr.rnr_retry = attr->rnr_retry; 689 qp->comp.rnr_retry = attr->rnr_retry; 690 pr_debug("qp#%d set rnr retry count = %d\n", qp_num(qp), 691 attr->rnr_retry); 692 } 693 694 if (mask & IB_QP_RQ_PSN) { 695 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK); 696 qp->resp.psn = qp->attr.rq_psn; 697 pr_debug("qp#%d set resp psn = 0x%x\n", qp_num(qp), 698 qp->resp.psn); 699 } 700 701 if (mask & IB_QP_MIN_RNR_TIMER) { 702 qp->attr.min_rnr_timer = attr->min_rnr_timer; 703 pr_debug("qp#%d set min rnr timer = 0x%x\n", qp_num(qp), 704 attr->min_rnr_timer); 705 } 706 707 if (mask & IB_QP_SQ_PSN) { 708 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK); 709 qp->req.psn = qp->attr.sq_psn; 710 qp->comp.psn = qp->attr.sq_psn; 711 pr_debug("qp#%d set req psn = 0x%x\n", qp_num(qp), qp->req.psn); 712 } 713 714 if (mask & IB_QP_PATH_MIG_STATE) 715 qp->attr.path_mig_state = attr->path_mig_state; 716 717 if (mask & IB_QP_DEST_QPN) 718 qp->attr.dest_qp_num = attr->dest_qp_num; 719 720 if (mask & IB_QP_STATE) { 721 qp->attr.qp_state = attr->qp_state; 722 723 switch (attr->qp_state) { 724 case IB_QPS_RESET: 725 pr_debug("qp#%d state -> RESET\n", qp_num(qp)); 726 rxe_qp_reset(qp); 727 break; 728 729 case IB_QPS_INIT: 730 pr_debug("qp#%d state -> INIT\n", qp_num(qp)); 731 qp->req.state = QP_STATE_INIT; 732 qp->resp.state = QP_STATE_INIT; 733 break; 734 735 case IB_QPS_RTR: 736 pr_debug("qp#%d state -> RTR\n", qp_num(qp)); 737 qp->resp.state = QP_STATE_READY; 738 break; 739 740 case IB_QPS_RTS: 741 pr_debug("qp#%d state -> RTS\n", qp_num(qp)); 742 qp->req.state = QP_STATE_READY; 743 break; 744 745 case IB_QPS_SQD: 746 pr_debug("qp#%d state -> SQD\n", qp_num(qp)); 747 rxe_qp_drain(qp); 748 break; 749 750 case IB_QPS_SQE: 751 pr_warn("qp#%d state -> SQE !!?\n", qp_num(qp)); 752 /* Not possible from modify_qp. */ 753 break; 754 755 case IB_QPS_ERR: 756 pr_debug("qp#%d state -> ERR\n", qp_num(qp)); 757 rxe_qp_error(qp); 758 break; 759 } 760 } 761 762 return 0; 763 } 764 765 /* called by the query qp verb */ 766 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask) 767 { 768 struct rxe_dev *rxe = to_rdev(qp->ibqp.device); 769 770 *attr = qp->attr; 771 772 attr->rq_psn = qp->resp.psn; 773 attr->sq_psn = qp->req.psn; 774 775 attr->cap.max_send_wr = qp->sq.max_wr; 776 attr->cap.max_send_sge = qp->sq.max_sge; 777 attr->cap.max_inline_data = qp->sq.max_inline; 778 779 if (!qp->srq) { 780 attr->cap.max_recv_wr = qp->rq.max_wr; 781 attr->cap.max_recv_sge = qp->rq.max_sge; 782 } 783 784 rxe_av_to_attr(rxe, &qp->pri_av, &attr->ah_attr); 785 rxe_av_to_attr(rxe, &qp->alt_av, &attr->alt_ah_attr); 786 787 if (qp->req.state == QP_STATE_DRAIN) { 788 attr->sq_draining = 1; 789 /* applications that get this state 790 * typically spin on it. yield the 791 * processor 792 */ 793 cond_resched(); 794 } else { 795 attr->sq_draining = 0; 796 } 797 798 pr_debug("attr->sq_draining = %d\n", attr->sq_draining); 799 800 return 0; 801 } 802 803 /* called by the destroy qp verb */ 804 void rxe_qp_destroy(struct rxe_qp *qp) 805 { 806 qp->valid = 0; 807 qp->qp_timeout_jiffies = 0; 808 rxe_cleanup_task(&qp->resp.task); 809 810 if (qp_type(qp) == IB_QPT_RC) { 811 del_timer_sync(&qp->retrans_timer); 812 del_timer_sync(&qp->rnr_nak_timer); 813 } 814 815 rxe_cleanup_task(&qp->req.task); 816 rxe_cleanup_task(&qp->comp.task); 817 818 /* flush out any receive wr's or pending requests */ 819 __rxe_do_task(&qp->req.task); 820 if (qp->sq.queue) { 821 __rxe_do_task(&qp->comp.task); 822 __rxe_do_task(&qp->req.task); 823 } 824 } 825 826 /* called when the last reference to the qp is dropped */ 827 void rxe_qp_cleanup(struct rxe_pool_entry *arg) 828 { 829 struct rxe_qp *qp = container_of(arg, typeof(*qp), pelem); 830 831 rxe_drop_all_mcast_groups(qp); 832 833 if (qp->sq.queue) 834 rxe_queue_cleanup(qp->sq.queue); 835 836 if (qp->srq) 837 rxe_drop_ref(qp->srq); 838 839 if (qp->rq.queue) 840 rxe_queue_cleanup(qp->rq.queue); 841 842 if (qp->scq) 843 rxe_drop_ref(qp->scq); 844 if (qp->rcq) 845 rxe_drop_ref(qp->rcq); 846 if (qp->pd) 847 rxe_drop_ref(qp->pd); 848 849 if (qp->resp.mr) { 850 rxe_drop_ref(qp->resp.mr); 851 qp->resp.mr = NULL; 852 } 853 854 if (qp_type(qp) == IB_QPT_RC) { 855 struct dst_entry *dst = NULL; 856 857 dst = sk_dst_get(qp->sk->sk); 858 if (dst) 859 dst_release(dst); 860 } 861 862 free_rd_atomic_resources(qp); 863 864 kernel_sock_shutdown(qp->sk, SHUT_RDWR); 865 sock_release(qp->sk); 866 } 867