1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2 /* 3 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. 4 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. 5 */ 6 7 #include <linux/skbuff.h> 8 #include <linux/delay.h> 9 #include <linux/sched.h> 10 #include <linux/vmalloc.h> 11 #include <rdma/uverbs_ioctl.h> 12 13 #include "rxe.h" 14 #include "rxe_loc.h" 15 #include "rxe_queue.h" 16 #include "rxe_task.h" 17 18 static int rxe_qp_chk_cap(struct rxe_dev *rxe, struct ib_qp_cap *cap, 19 int has_srq) 20 { 21 if (cap->max_send_wr > rxe->attr.max_qp_wr) { 22 pr_warn("invalid send wr = %d > %d\n", 23 cap->max_send_wr, rxe->attr.max_qp_wr); 24 goto err1; 25 } 26 27 if (cap->max_send_sge > rxe->attr.max_send_sge) { 28 pr_warn("invalid send sge = %d > %d\n", 29 cap->max_send_sge, rxe->attr.max_send_sge); 30 goto err1; 31 } 32 33 if (!has_srq) { 34 if (cap->max_recv_wr > rxe->attr.max_qp_wr) { 35 pr_warn("invalid recv wr = %d > %d\n", 36 cap->max_recv_wr, rxe->attr.max_qp_wr); 37 goto err1; 38 } 39 40 if (cap->max_recv_sge > rxe->attr.max_recv_sge) { 41 pr_warn("invalid recv sge = %d > %d\n", 42 cap->max_recv_sge, rxe->attr.max_recv_sge); 43 goto err1; 44 } 45 } 46 47 if (cap->max_inline_data > rxe->max_inline_data) { 48 pr_warn("invalid max inline data = %d > %d\n", 49 cap->max_inline_data, rxe->max_inline_data); 50 goto err1; 51 } 52 53 return 0; 54 55 err1: 56 return -EINVAL; 57 } 58 59 int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init) 60 { 61 struct ib_qp_cap *cap = &init->cap; 62 struct rxe_port *port; 63 int port_num = init->port_num; 64 65 switch (init->qp_type) { 66 case IB_QPT_GSI: 67 case IB_QPT_RC: 68 case IB_QPT_UC: 69 case IB_QPT_UD: 70 break; 71 default: 72 return -EOPNOTSUPP; 73 } 74 75 if (!init->recv_cq || !init->send_cq) { 76 pr_warn("missing cq\n"); 77 goto err1; 78 } 79 80 if (rxe_qp_chk_cap(rxe, cap, !!init->srq)) 81 goto err1; 82 83 if (init->qp_type == IB_QPT_GSI) { 84 if (!rdma_is_port_valid(&rxe->ib_dev, port_num)) { 85 pr_warn("invalid port = %d\n", port_num); 86 goto err1; 87 } 88 89 port = &rxe->port; 90 91 if (init->qp_type == IB_QPT_GSI && port->qp_gsi_index) { 92 pr_warn("GSI QP exists for port %d\n", port_num); 93 goto err1; 94 } 95 } 96 97 return 0; 98 99 err1: 100 return -EINVAL; 101 } 102 103 static int alloc_rd_atomic_resources(struct rxe_qp *qp, unsigned int n) 104 { 105 qp->resp.res_head = 0; 106 qp->resp.res_tail = 0; 107 qp->resp.resources = kcalloc(n, sizeof(struct resp_res), GFP_KERNEL); 108 109 if (!qp->resp.resources) 110 return -ENOMEM; 111 112 return 0; 113 } 114 115 static void free_rd_atomic_resources(struct rxe_qp *qp) 116 { 117 if (qp->resp.resources) { 118 int i; 119 120 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) { 121 struct resp_res *res = &qp->resp.resources[i]; 122 123 free_rd_atomic_resource(qp, res); 124 } 125 kfree(qp->resp.resources); 126 qp->resp.resources = NULL; 127 } 128 } 129 130 void free_rd_atomic_resource(struct rxe_qp *qp, struct resp_res *res) 131 { 132 if (res->type == RXE_ATOMIC_MASK) 133 kfree_skb(res->atomic.skb); 134 res->type = 0; 135 } 136 137 static void cleanup_rd_atomic_resources(struct rxe_qp *qp) 138 { 139 int i; 140 struct resp_res *res; 141 142 if (qp->resp.resources) { 143 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) { 144 res = &qp->resp.resources[i]; 145 free_rd_atomic_resource(qp, res); 146 } 147 } 148 } 149 150 static void rxe_qp_init_misc(struct rxe_dev *rxe, struct rxe_qp *qp, 151 struct ib_qp_init_attr *init) 152 { 153 struct rxe_port *port; 154 u32 qpn; 155 156 qp->sq_sig_type = init->sq_sig_type; 157 qp->attr.path_mtu = 1; 158 qp->mtu = ib_mtu_enum_to_int(qp->attr.path_mtu); 159 160 qpn = qp->elem.index; 161 port = &rxe->port; 162 163 switch (init->qp_type) { 164 case IB_QPT_GSI: 165 qp->ibqp.qp_num = 1; 166 port->qp_gsi_index = qpn; 167 qp->attr.port_num = init->port_num; 168 break; 169 170 default: 171 qp->ibqp.qp_num = qpn; 172 break; 173 } 174 175 spin_lock_init(&qp->state_lock); 176 177 atomic_set(&qp->ssn, 0); 178 atomic_set(&qp->skb_out, 0); 179 } 180 181 static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp, 182 struct ib_qp_init_attr *init, struct ib_udata *udata, 183 struct rxe_create_qp_resp __user *uresp) 184 { 185 int err; 186 int wqe_size; 187 enum queue_type type; 188 189 err = sock_create_kern(&init_net, AF_INET, SOCK_DGRAM, 0, &qp->sk); 190 if (err < 0) 191 return err; 192 qp->sk->sk->sk_user_data = qp; 193 194 /* pick a source UDP port number for this QP based on 195 * the source QPN. this spreads traffic for different QPs 196 * across different NIC RX queues (while using a single 197 * flow for a given QP to maintain packet order). 198 * the port number must be in the Dynamic Ports range 199 * (0xc000 - 0xffff). 200 */ 201 qp->src_port = RXE_ROCE_V2_SPORT + (hash_32(qp_num(qp), 14) & 0x3fff); 202 qp->sq.max_wr = init->cap.max_send_wr; 203 204 /* These caps are limited by rxe_qp_chk_cap() done by the caller */ 205 wqe_size = max_t(int, init->cap.max_send_sge * sizeof(struct ib_sge), 206 init->cap.max_inline_data); 207 qp->sq.max_sge = init->cap.max_send_sge = 208 wqe_size / sizeof(struct ib_sge); 209 qp->sq.max_inline = init->cap.max_inline_data = wqe_size; 210 wqe_size += sizeof(struct rxe_send_wqe); 211 212 type = QUEUE_TYPE_FROM_CLIENT; 213 qp->sq.queue = rxe_queue_init(rxe, &qp->sq.max_wr, 214 wqe_size, type); 215 if (!qp->sq.queue) 216 return -ENOMEM; 217 218 err = do_mmap_info(rxe, uresp ? &uresp->sq_mi : NULL, udata, 219 qp->sq.queue->buf, qp->sq.queue->buf_size, 220 &qp->sq.queue->ip); 221 222 if (err) { 223 vfree(qp->sq.queue->buf); 224 kfree(qp->sq.queue); 225 qp->sq.queue = NULL; 226 return err; 227 } 228 229 qp->req.wqe_index = queue_get_producer(qp->sq.queue, 230 QUEUE_TYPE_FROM_CLIENT); 231 232 qp->req.state = QP_STATE_RESET; 233 qp->req.opcode = -1; 234 qp->comp.opcode = -1; 235 236 spin_lock_init(&qp->sq.sq_lock); 237 skb_queue_head_init(&qp->req_pkts); 238 239 rxe_init_task(rxe, &qp->req.task, qp, 240 rxe_requester, "req"); 241 rxe_init_task(rxe, &qp->comp.task, qp, 242 rxe_completer, "comp"); 243 244 qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */ 245 if (init->qp_type == IB_QPT_RC) { 246 timer_setup(&qp->rnr_nak_timer, rnr_nak_timer, 0); 247 timer_setup(&qp->retrans_timer, retransmit_timer, 0); 248 } 249 return 0; 250 } 251 252 static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp, 253 struct ib_qp_init_attr *init, 254 struct ib_udata *udata, 255 struct rxe_create_qp_resp __user *uresp) 256 { 257 int err; 258 int wqe_size; 259 enum queue_type type; 260 261 if (!qp->srq) { 262 qp->rq.max_wr = init->cap.max_recv_wr; 263 qp->rq.max_sge = init->cap.max_recv_sge; 264 265 wqe_size = rcv_wqe_size(qp->rq.max_sge); 266 267 pr_debug("qp#%d max_wr = %d, max_sge = %d, wqe_size = %d\n", 268 qp_num(qp), qp->rq.max_wr, qp->rq.max_sge, wqe_size); 269 270 type = QUEUE_TYPE_FROM_CLIENT; 271 qp->rq.queue = rxe_queue_init(rxe, &qp->rq.max_wr, 272 wqe_size, type); 273 if (!qp->rq.queue) 274 return -ENOMEM; 275 276 err = do_mmap_info(rxe, uresp ? &uresp->rq_mi : NULL, udata, 277 qp->rq.queue->buf, qp->rq.queue->buf_size, 278 &qp->rq.queue->ip); 279 if (err) { 280 vfree(qp->rq.queue->buf); 281 kfree(qp->rq.queue); 282 qp->rq.queue = NULL; 283 return err; 284 } 285 } 286 287 spin_lock_init(&qp->rq.producer_lock); 288 spin_lock_init(&qp->rq.consumer_lock); 289 290 skb_queue_head_init(&qp->resp_pkts); 291 292 rxe_init_task(rxe, &qp->resp.task, qp, 293 rxe_responder, "resp"); 294 295 qp->resp.opcode = OPCODE_NONE; 296 qp->resp.msn = 0; 297 qp->resp.state = QP_STATE_RESET; 298 299 return 0; 300 } 301 302 /* called by the create qp verb */ 303 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd, 304 struct ib_qp_init_attr *init, 305 struct rxe_create_qp_resp __user *uresp, 306 struct ib_pd *ibpd, 307 struct ib_udata *udata) 308 { 309 int err; 310 struct rxe_cq *rcq = to_rcq(init->recv_cq); 311 struct rxe_cq *scq = to_rcq(init->send_cq); 312 struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL; 313 314 rxe_get(pd); 315 rxe_get(rcq); 316 rxe_get(scq); 317 if (srq) 318 rxe_get(srq); 319 320 qp->pd = pd; 321 qp->rcq = rcq; 322 qp->scq = scq; 323 qp->srq = srq; 324 325 atomic_inc(&rcq->num_wq); 326 atomic_inc(&scq->num_wq); 327 328 rxe_qp_init_misc(rxe, qp, init); 329 330 err = rxe_qp_init_req(rxe, qp, init, udata, uresp); 331 if (err) 332 goto err1; 333 334 err = rxe_qp_init_resp(rxe, qp, init, udata, uresp); 335 if (err) 336 goto err2; 337 338 qp->attr.qp_state = IB_QPS_RESET; 339 qp->valid = 1; 340 341 return 0; 342 343 err2: 344 rxe_queue_cleanup(qp->sq.queue); 345 qp->sq.queue = NULL; 346 err1: 347 atomic_dec(&rcq->num_wq); 348 atomic_dec(&scq->num_wq); 349 350 qp->pd = NULL; 351 qp->rcq = NULL; 352 qp->scq = NULL; 353 qp->srq = NULL; 354 355 if (srq) 356 rxe_put(srq); 357 rxe_put(scq); 358 rxe_put(rcq); 359 rxe_put(pd); 360 361 return err; 362 } 363 364 /* called by the query qp verb */ 365 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init) 366 { 367 init->event_handler = qp->ibqp.event_handler; 368 init->qp_context = qp->ibqp.qp_context; 369 init->send_cq = qp->ibqp.send_cq; 370 init->recv_cq = qp->ibqp.recv_cq; 371 init->srq = qp->ibqp.srq; 372 373 init->cap.max_send_wr = qp->sq.max_wr; 374 init->cap.max_send_sge = qp->sq.max_sge; 375 init->cap.max_inline_data = qp->sq.max_inline; 376 377 if (!qp->srq) { 378 init->cap.max_recv_wr = qp->rq.max_wr; 379 init->cap.max_recv_sge = qp->rq.max_sge; 380 } 381 382 init->sq_sig_type = qp->sq_sig_type; 383 384 init->qp_type = qp->ibqp.qp_type; 385 init->port_num = 1; 386 387 return 0; 388 } 389 390 /* called by the modify qp verb, this routine checks all the parameters before 391 * making any changes 392 */ 393 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp, 394 struct ib_qp_attr *attr, int mask) 395 { 396 enum ib_qp_state cur_state = (mask & IB_QP_CUR_STATE) ? 397 attr->cur_qp_state : qp->attr.qp_state; 398 enum ib_qp_state new_state = (mask & IB_QP_STATE) ? 399 attr->qp_state : cur_state; 400 401 if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask)) { 402 pr_warn("invalid mask or state for qp\n"); 403 goto err1; 404 } 405 406 if (mask & IB_QP_STATE) { 407 if (cur_state == IB_QPS_SQD) { 408 if (qp->req.state == QP_STATE_DRAIN && 409 new_state != IB_QPS_ERR) 410 goto err1; 411 } 412 } 413 414 if (mask & IB_QP_PORT) { 415 if (!rdma_is_port_valid(&rxe->ib_dev, attr->port_num)) { 416 pr_warn("invalid port %d\n", attr->port_num); 417 goto err1; 418 } 419 } 420 421 if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq)) 422 goto err1; 423 424 if (mask & IB_QP_AV && rxe_av_chk_attr(rxe, &attr->ah_attr)) 425 goto err1; 426 427 if (mask & IB_QP_ALT_PATH) { 428 if (rxe_av_chk_attr(rxe, &attr->alt_ah_attr)) 429 goto err1; 430 if (!rdma_is_port_valid(&rxe->ib_dev, attr->alt_port_num)) { 431 pr_warn("invalid alt port %d\n", attr->alt_port_num); 432 goto err1; 433 } 434 if (attr->alt_timeout > 31) { 435 pr_warn("invalid QP alt timeout %d > 31\n", 436 attr->alt_timeout); 437 goto err1; 438 } 439 } 440 441 if (mask & IB_QP_PATH_MTU) { 442 struct rxe_port *port = &rxe->port; 443 444 enum ib_mtu max_mtu = port->attr.max_mtu; 445 enum ib_mtu mtu = attr->path_mtu; 446 447 if (mtu > max_mtu) { 448 pr_debug("invalid mtu (%d) > (%d)\n", 449 ib_mtu_enum_to_int(mtu), 450 ib_mtu_enum_to_int(max_mtu)); 451 goto err1; 452 } 453 } 454 455 if (mask & IB_QP_MAX_QP_RD_ATOMIC) { 456 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) { 457 pr_warn("invalid max_rd_atomic %d > %d\n", 458 attr->max_rd_atomic, 459 rxe->attr.max_qp_rd_atom); 460 goto err1; 461 } 462 } 463 464 if (mask & IB_QP_TIMEOUT) { 465 if (attr->timeout > 31) { 466 pr_warn("invalid QP timeout %d > 31\n", 467 attr->timeout); 468 goto err1; 469 } 470 } 471 472 return 0; 473 474 err1: 475 return -EINVAL; 476 } 477 478 /* move the qp to the reset state */ 479 static void rxe_qp_reset(struct rxe_qp *qp) 480 { 481 /* stop tasks from running */ 482 rxe_disable_task(&qp->resp.task); 483 484 /* stop request/comp */ 485 if (qp->sq.queue) { 486 if (qp_type(qp) == IB_QPT_RC) 487 rxe_disable_task(&qp->comp.task); 488 rxe_disable_task(&qp->req.task); 489 } 490 491 /* move qp to the reset state */ 492 qp->req.state = QP_STATE_RESET; 493 qp->resp.state = QP_STATE_RESET; 494 495 /* let state machines reset themselves drain work and packet queues 496 * etc. 497 */ 498 __rxe_do_task(&qp->resp.task); 499 500 if (qp->sq.queue) { 501 __rxe_do_task(&qp->comp.task); 502 __rxe_do_task(&qp->req.task); 503 rxe_queue_reset(qp->sq.queue); 504 } 505 506 /* cleanup attributes */ 507 atomic_set(&qp->ssn, 0); 508 qp->req.opcode = -1; 509 qp->req.need_retry = 0; 510 qp->req.noack_pkts = 0; 511 qp->resp.msn = 0; 512 qp->resp.opcode = -1; 513 qp->resp.drop_msg = 0; 514 qp->resp.goto_error = 0; 515 qp->resp.sent_psn_nak = 0; 516 517 if (qp->resp.mr) { 518 rxe_put(qp->resp.mr); 519 qp->resp.mr = NULL; 520 } 521 522 cleanup_rd_atomic_resources(qp); 523 524 /* reenable tasks */ 525 rxe_enable_task(&qp->resp.task); 526 527 if (qp->sq.queue) { 528 if (qp_type(qp) == IB_QPT_RC) 529 rxe_enable_task(&qp->comp.task); 530 531 rxe_enable_task(&qp->req.task); 532 } 533 } 534 535 /* drain the send queue */ 536 static void rxe_qp_drain(struct rxe_qp *qp) 537 { 538 if (qp->sq.queue) { 539 if (qp->req.state != QP_STATE_DRAINED) { 540 qp->req.state = QP_STATE_DRAIN; 541 if (qp_type(qp) == IB_QPT_RC) 542 rxe_run_task(&qp->comp.task, 1); 543 else 544 __rxe_do_task(&qp->comp.task); 545 rxe_run_task(&qp->req.task, 1); 546 } 547 } 548 } 549 550 /* move the qp to the error state */ 551 void rxe_qp_error(struct rxe_qp *qp) 552 { 553 qp->req.state = QP_STATE_ERROR; 554 qp->resp.state = QP_STATE_ERROR; 555 qp->attr.qp_state = IB_QPS_ERR; 556 557 /* drain work and packet queues */ 558 rxe_run_task(&qp->resp.task, 1); 559 560 if (qp_type(qp) == IB_QPT_RC) 561 rxe_run_task(&qp->comp.task, 1); 562 else 563 __rxe_do_task(&qp->comp.task); 564 rxe_run_task(&qp->req.task, 1); 565 } 566 567 /* called by the modify qp verb */ 568 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask, 569 struct ib_udata *udata) 570 { 571 int err; 572 573 if (mask & IB_QP_MAX_QP_RD_ATOMIC) { 574 int max_rd_atomic = attr->max_rd_atomic ? 575 roundup_pow_of_two(attr->max_rd_atomic) : 0; 576 577 qp->attr.max_rd_atomic = max_rd_atomic; 578 atomic_set(&qp->req.rd_atomic, max_rd_atomic); 579 } 580 581 if (mask & IB_QP_MAX_DEST_RD_ATOMIC) { 582 int max_dest_rd_atomic = attr->max_dest_rd_atomic ? 583 roundup_pow_of_two(attr->max_dest_rd_atomic) : 0; 584 585 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic; 586 587 free_rd_atomic_resources(qp); 588 589 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic); 590 if (err) 591 return err; 592 } 593 594 if (mask & IB_QP_CUR_STATE) 595 qp->attr.cur_qp_state = attr->qp_state; 596 597 if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY) 598 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify; 599 600 if (mask & IB_QP_ACCESS_FLAGS) 601 qp->attr.qp_access_flags = attr->qp_access_flags; 602 603 if (mask & IB_QP_PKEY_INDEX) 604 qp->attr.pkey_index = attr->pkey_index; 605 606 if (mask & IB_QP_PORT) 607 qp->attr.port_num = attr->port_num; 608 609 if (mask & IB_QP_QKEY) 610 qp->attr.qkey = attr->qkey; 611 612 if (mask & IB_QP_AV) 613 rxe_init_av(&attr->ah_attr, &qp->pri_av); 614 615 if (mask & IB_QP_ALT_PATH) { 616 rxe_init_av(&attr->alt_ah_attr, &qp->alt_av); 617 qp->attr.alt_port_num = attr->alt_port_num; 618 qp->attr.alt_pkey_index = attr->alt_pkey_index; 619 qp->attr.alt_timeout = attr->alt_timeout; 620 } 621 622 if (mask & IB_QP_PATH_MTU) { 623 qp->attr.path_mtu = attr->path_mtu; 624 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu); 625 } 626 627 if (mask & IB_QP_TIMEOUT) { 628 qp->attr.timeout = attr->timeout; 629 if (attr->timeout == 0) { 630 qp->qp_timeout_jiffies = 0; 631 } else { 632 /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */ 633 int j = nsecs_to_jiffies(4096ULL << attr->timeout); 634 635 qp->qp_timeout_jiffies = j ? j : 1; 636 } 637 } 638 639 if (mask & IB_QP_RETRY_CNT) { 640 qp->attr.retry_cnt = attr->retry_cnt; 641 qp->comp.retry_cnt = attr->retry_cnt; 642 pr_debug("qp#%d set retry count = %d\n", qp_num(qp), 643 attr->retry_cnt); 644 } 645 646 if (mask & IB_QP_RNR_RETRY) { 647 qp->attr.rnr_retry = attr->rnr_retry; 648 qp->comp.rnr_retry = attr->rnr_retry; 649 pr_debug("qp#%d set rnr retry count = %d\n", qp_num(qp), 650 attr->rnr_retry); 651 } 652 653 if (mask & IB_QP_RQ_PSN) { 654 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK); 655 qp->resp.psn = qp->attr.rq_psn; 656 pr_debug("qp#%d set resp psn = 0x%x\n", qp_num(qp), 657 qp->resp.psn); 658 } 659 660 if (mask & IB_QP_MIN_RNR_TIMER) { 661 qp->attr.min_rnr_timer = attr->min_rnr_timer; 662 pr_debug("qp#%d set min rnr timer = 0x%x\n", qp_num(qp), 663 attr->min_rnr_timer); 664 } 665 666 if (mask & IB_QP_SQ_PSN) { 667 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK); 668 qp->req.psn = qp->attr.sq_psn; 669 qp->comp.psn = qp->attr.sq_psn; 670 pr_debug("qp#%d set req psn = 0x%x\n", qp_num(qp), qp->req.psn); 671 } 672 673 if (mask & IB_QP_PATH_MIG_STATE) 674 qp->attr.path_mig_state = attr->path_mig_state; 675 676 if (mask & IB_QP_DEST_QPN) 677 qp->attr.dest_qp_num = attr->dest_qp_num; 678 679 if (mask & IB_QP_STATE) { 680 qp->attr.qp_state = attr->qp_state; 681 682 switch (attr->qp_state) { 683 case IB_QPS_RESET: 684 pr_debug("qp#%d state -> RESET\n", qp_num(qp)); 685 rxe_qp_reset(qp); 686 break; 687 688 case IB_QPS_INIT: 689 pr_debug("qp#%d state -> INIT\n", qp_num(qp)); 690 qp->req.state = QP_STATE_INIT; 691 qp->resp.state = QP_STATE_INIT; 692 break; 693 694 case IB_QPS_RTR: 695 pr_debug("qp#%d state -> RTR\n", qp_num(qp)); 696 qp->resp.state = QP_STATE_READY; 697 break; 698 699 case IB_QPS_RTS: 700 pr_debug("qp#%d state -> RTS\n", qp_num(qp)); 701 qp->req.state = QP_STATE_READY; 702 break; 703 704 case IB_QPS_SQD: 705 pr_debug("qp#%d state -> SQD\n", qp_num(qp)); 706 rxe_qp_drain(qp); 707 break; 708 709 case IB_QPS_SQE: 710 pr_warn("qp#%d state -> SQE !!?\n", qp_num(qp)); 711 /* Not possible from modify_qp. */ 712 break; 713 714 case IB_QPS_ERR: 715 pr_debug("qp#%d state -> ERR\n", qp_num(qp)); 716 rxe_qp_error(qp); 717 break; 718 } 719 } 720 721 return 0; 722 } 723 724 /* called by the query qp verb */ 725 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask) 726 { 727 *attr = qp->attr; 728 729 attr->rq_psn = qp->resp.psn; 730 attr->sq_psn = qp->req.psn; 731 732 attr->cap.max_send_wr = qp->sq.max_wr; 733 attr->cap.max_send_sge = qp->sq.max_sge; 734 attr->cap.max_inline_data = qp->sq.max_inline; 735 736 if (!qp->srq) { 737 attr->cap.max_recv_wr = qp->rq.max_wr; 738 attr->cap.max_recv_sge = qp->rq.max_sge; 739 } 740 741 rxe_av_to_attr(&qp->pri_av, &attr->ah_attr); 742 rxe_av_to_attr(&qp->alt_av, &attr->alt_ah_attr); 743 744 if (qp->req.state == QP_STATE_DRAIN) { 745 attr->sq_draining = 1; 746 /* applications that get this state 747 * typically spin on it. yield the 748 * processor 749 */ 750 cond_resched(); 751 } else { 752 attr->sq_draining = 0; 753 } 754 755 pr_debug("attr->sq_draining = %d\n", attr->sq_draining); 756 757 return 0; 758 } 759 760 int rxe_qp_chk_destroy(struct rxe_qp *qp) 761 { 762 /* See IBA o10-2.2.3 763 * An attempt to destroy a QP while attached to a mcast group 764 * will fail immediately. 765 */ 766 if (atomic_read(&qp->mcg_num)) { 767 pr_debug("Attempt to destroy QP while attached to multicast group\n"); 768 return -EBUSY; 769 } 770 771 return 0; 772 } 773 774 /* called when the last reference to the qp is dropped */ 775 static void rxe_qp_do_cleanup(struct work_struct *work) 776 { 777 struct rxe_qp *qp = container_of(work, typeof(*qp), cleanup_work.work); 778 779 qp->valid = 0; 780 qp->qp_timeout_jiffies = 0; 781 rxe_cleanup_task(&qp->resp.task); 782 783 if (qp_type(qp) == IB_QPT_RC) { 784 del_timer_sync(&qp->retrans_timer); 785 del_timer_sync(&qp->rnr_nak_timer); 786 } 787 788 rxe_cleanup_task(&qp->req.task); 789 rxe_cleanup_task(&qp->comp.task); 790 791 /* flush out any receive wr's or pending requests */ 792 __rxe_do_task(&qp->req.task); 793 if (qp->sq.queue) { 794 __rxe_do_task(&qp->comp.task); 795 __rxe_do_task(&qp->req.task); 796 } 797 798 if (qp->sq.queue) 799 rxe_queue_cleanup(qp->sq.queue); 800 801 if (qp->srq) 802 rxe_put(qp->srq); 803 804 if (qp->rq.queue) 805 rxe_queue_cleanup(qp->rq.queue); 806 807 atomic_dec(&qp->scq->num_wq); 808 if (qp->scq) 809 rxe_put(qp->scq); 810 811 atomic_dec(&qp->rcq->num_wq); 812 if (qp->rcq) 813 rxe_put(qp->rcq); 814 815 if (qp->pd) 816 rxe_put(qp->pd); 817 818 if (qp->resp.mr) 819 rxe_put(qp->resp.mr); 820 821 if (qp_type(qp) == IB_QPT_RC) 822 sk_dst_reset(qp->sk->sk); 823 824 free_rd_atomic_resources(qp); 825 826 kernel_sock_shutdown(qp->sk, SHUT_RDWR); 827 sock_release(qp->sk); 828 } 829 830 /* called when the last reference to the qp is dropped */ 831 void rxe_qp_cleanup(struct rxe_pool_elem *elem) 832 { 833 struct rxe_qp *qp = container_of(elem, typeof(*qp), elem); 834 835 execute_in_process_context(rxe_qp_do_cleanup, &qp->cleanup_work); 836 } 837