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 rxe_dbg(rxe, "invalid send wr = %u > %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 rxe_dbg(rxe, "invalid send sge = %u > %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 rxe_dbg(rxe, "invalid recv wr = %u > %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 rxe_dbg(rxe, "invalid recv sge = %u > %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 rxe_dbg(rxe, "invalid max inline data = %u > %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 rxe_dbg(rxe, "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 rxe_dbg(rxe, "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 rxe_dbg(rxe, "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(res); 124 } 125 kfree(qp->resp.resources); 126 qp->resp.resources = NULL; 127 } 128 } 129 130 void free_rd_atomic_resource(struct resp_res *res) 131 { 132 res->type = 0; 133 } 134 135 static void cleanup_rd_atomic_resources(struct rxe_qp *qp) 136 { 137 int i; 138 struct resp_res *res; 139 140 if (qp->resp.resources) { 141 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) { 142 res = &qp->resp.resources[i]; 143 free_rd_atomic_resource(res); 144 } 145 } 146 } 147 148 static void rxe_qp_init_misc(struct rxe_dev *rxe, struct rxe_qp *qp, 149 struct ib_qp_init_attr *init) 150 { 151 struct rxe_port *port; 152 u32 qpn; 153 154 qp->sq_sig_type = init->sq_sig_type; 155 qp->attr.path_mtu = 1; 156 qp->mtu = ib_mtu_enum_to_int(qp->attr.path_mtu); 157 158 qpn = qp->elem.index; 159 port = &rxe->port; 160 161 switch (init->qp_type) { 162 case IB_QPT_GSI: 163 qp->ibqp.qp_num = 1; 164 port->qp_gsi_index = qpn; 165 qp->attr.port_num = init->port_num; 166 break; 167 168 default: 169 qp->ibqp.qp_num = qpn; 170 break; 171 } 172 173 spin_lock_init(&qp->state_lock); 174 175 spin_lock_init(&qp->sq.sq_lock); 176 spin_lock_init(&qp->rq.producer_lock); 177 spin_lock_init(&qp->rq.consumer_lock); 178 179 atomic_set(&qp->ssn, 0); 180 atomic_set(&qp->skb_out, 0); 181 } 182 183 static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp, 184 struct ib_qp_init_attr *init, struct ib_udata *udata, 185 struct rxe_create_qp_resp __user *uresp) 186 { 187 int err; 188 int wqe_size; 189 enum queue_type type; 190 191 err = sock_create_kern(&init_net, AF_INET, SOCK_DGRAM, 0, &qp->sk); 192 if (err < 0) 193 return err; 194 qp->sk->sk->sk_user_data = qp; 195 196 /* pick a source UDP port number for this QP based on 197 * the source QPN. this spreads traffic for different QPs 198 * across different NIC RX queues (while using a single 199 * flow for a given QP to maintain packet order). 200 * the port number must be in the Dynamic Ports range 201 * (0xc000 - 0xffff). 202 */ 203 qp->src_port = RXE_ROCE_V2_SPORT + (hash_32(qp_num(qp), 14) & 0x3fff); 204 qp->sq.max_wr = init->cap.max_send_wr; 205 206 /* These caps are limited by rxe_qp_chk_cap() done by the caller */ 207 wqe_size = max_t(int, init->cap.max_send_sge * sizeof(struct ib_sge), 208 init->cap.max_inline_data); 209 qp->sq.max_sge = init->cap.max_send_sge = 210 wqe_size / sizeof(struct ib_sge); 211 qp->sq.max_inline = init->cap.max_inline_data = wqe_size; 212 wqe_size += sizeof(struct rxe_send_wqe); 213 214 type = QUEUE_TYPE_FROM_CLIENT; 215 qp->sq.queue = rxe_queue_init(rxe, &qp->sq.max_wr, 216 wqe_size, type); 217 if (!qp->sq.queue) 218 return -ENOMEM; 219 220 err = do_mmap_info(rxe, uresp ? &uresp->sq_mi : NULL, udata, 221 qp->sq.queue->buf, qp->sq.queue->buf_size, 222 &qp->sq.queue->ip); 223 224 if (err) { 225 vfree(qp->sq.queue->buf); 226 kfree(qp->sq.queue); 227 qp->sq.queue = NULL; 228 return err; 229 } 230 231 qp->req.wqe_index = queue_get_producer(qp->sq.queue, 232 QUEUE_TYPE_FROM_CLIENT); 233 234 qp->req.state = QP_STATE_RESET; 235 qp->comp.state = QP_STATE_RESET; 236 qp->req.opcode = -1; 237 qp->comp.opcode = -1; 238 239 skb_queue_head_init(&qp->req_pkts); 240 241 rxe_init_task(&qp->req.task, qp, rxe_requester); 242 rxe_init_task(&qp->comp.task, qp, rxe_completer); 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 type = QUEUE_TYPE_FROM_CLIENT; 268 qp->rq.queue = rxe_queue_init(rxe, &qp->rq.max_wr, 269 wqe_size, type); 270 if (!qp->rq.queue) 271 return -ENOMEM; 272 273 err = do_mmap_info(rxe, uresp ? &uresp->rq_mi : NULL, udata, 274 qp->rq.queue->buf, qp->rq.queue->buf_size, 275 &qp->rq.queue->ip); 276 if (err) { 277 vfree(qp->rq.queue->buf); 278 kfree(qp->rq.queue); 279 qp->rq.queue = NULL; 280 return err; 281 } 282 } 283 284 skb_queue_head_init(&qp->resp_pkts); 285 286 rxe_init_task(&qp->resp.task, qp, rxe_responder); 287 288 qp->resp.opcode = OPCODE_NONE; 289 qp->resp.msn = 0; 290 qp->resp.state = QP_STATE_RESET; 291 292 return 0; 293 } 294 295 /* called by the create qp verb */ 296 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd, 297 struct ib_qp_init_attr *init, 298 struct rxe_create_qp_resp __user *uresp, 299 struct ib_pd *ibpd, 300 struct ib_udata *udata) 301 { 302 int err; 303 struct rxe_cq *rcq = to_rcq(init->recv_cq); 304 struct rxe_cq *scq = to_rcq(init->send_cq); 305 struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL; 306 307 rxe_get(pd); 308 rxe_get(rcq); 309 rxe_get(scq); 310 if (srq) 311 rxe_get(srq); 312 313 qp->pd = pd; 314 qp->rcq = rcq; 315 qp->scq = scq; 316 qp->srq = srq; 317 318 atomic_inc(&rcq->num_wq); 319 atomic_inc(&scq->num_wq); 320 321 rxe_qp_init_misc(rxe, qp, init); 322 323 err = rxe_qp_init_req(rxe, qp, init, udata, uresp); 324 if (err) 325 goto err1; 326 327 err = rxe_qp_init_resp(rxe, qp, init, udata, uresp); 328 if (err) 329 goto err2; 330 331 qp->attr.qp_state = IB_QPS_RESET; 332 qp->valid = 1; 333 334 return 0; 335 336 err2: 337 rxe_queue_cleanup(qp->sq.queue); 338 qp->sq.queue = NULL; 339 err1: 340 atomic_dec(&rcq->num_wq); 341 atomic_dec(&scq->num_wq); 342 343 qp->pd = NULL; 344 qp->rcq = NULL; 345 qp->scq = NULL; 346 qp->srq = NULL; 347 348 if (srq) 349 rxe_put(srq); 350 rxe_put(scq); 351 rxe_put(rcq); 352 rxe_put(pd); 353 354 return err; 355 } 356 357 /* called by the query qp verb */ 358 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init) 359 { 360 init->event_handler = qp->ibqp.event_handler; 361 init->qp_context = qp->ibqp.qp_context; 362 init->send_cq = qp->ibqp.send_cq; 363 init->recv_cq = qp->ibqp.recv_cq; 364 init->srq = qp->ibqp.srq; 365 366 init->cap.max_send_wr = qp->sq.max_wr; 367 init->cap.max_send_sge = qp->sq.max_sge; 368 init->cap.max_inline_data = qp->sq.max_inline; 369 370 if (!qp->srq) { 371 init->cap.max_recv_wr = qp->rq.max_wr; 372 init->cap.max_recv_sge = qp->rq.max_sge; 373 } 374 375 init->sq_sig_type = qp->sq_sig_type; 376 377 init->qp_type = qp->ibqp.qp_type; 378 init->port_num = 1; 379 380 return 0; 381 } 382 383 /* called by the modify qp verb, this routine checks all the parameters before 384 * making any changes 385 */ 386 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp, 387 struct ib_qp_attr *attr, int mask) 388 { 389 enum ib_qp_state cur_state = (mask & IB_QP_CUR_STATE) ? 390 attr->cur_qp_state : qp->attr.qp_state; 391 enum ib_qp_state new_state = (mask & IB_QP_STATE) ? 392 attr->qp_state : cur_state; 393 394 if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask)) { 395 rxe_dbg_qp(qp, "invalid mask or state\n"); 396 goto err1; 397 } 398 399 if (mask & IB_QP_STATE) { 400 if (cur_state == IB_QPS_SQD) { 401 if (qp->req.state == QP_STATE_DRAIN && 402 new_state != IB_QPS_ERR) 403 goto err1; 404 } 405 } 406 407 if (mask & IB_QP_PORT) { 408 if (!rdma_is_port_valid(&rxe->ib_dev, attr->port_num)) { 409 rxe_dbg_qp(qp, "invalid port %d\n", attr->port_num); 410 goto err1; 411 } 412 } 413 414 if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq)) 415 goto err1; 416 417 if (mask & IB_QP_AV && rxe_av_chk_attr(qp, &attr->ah_attr)) 418 goto err1; 419 420 if (mask & IB_QP_ALT_PATH) { 421 if (rxe_av_chk_attr(qp, &attr->alt_ah_attr)) 422 goto err1; 423 if (!rdma_is_port_valid(&rxe->ib_dev, attr->alt_port_num)) { 424 rxe_dbg_qp(qp, "invalid alt port %d\n", attr->alt_port_num); 425 goto err1; 426 } 427 if (attr->alt_timeout > 31) { 428 rxe_dbg_qp(qp, "invalid alt timeout %d > 31\n", 429 attr->alt_timeout); 430 goto err1; 431 } 432 } 433 434 if (mask & IB_QP_PATH_MTU) { 435 struct rxe_port *port = &rxe->port; 436 437 enum ib_mtu max_mtu = port->attr.max_mtu; 438 enum ib_mtu mtu = attr->path_mtu; 439 440 if (mtu > max_mtu) { 441 rxe_dbg_qp(qp, "invalid mtu (%d) > (%d)\n", 442 ib_mtu_enum_to_int(mtu), 443 ib_mtu_enum_to_int(max_mtu)); 444 goto err1; 445 } 446 } 447 448 if (mask & IB_QP_MAX_QP_RD_ATOMIC) { 449 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) { 450 rxe_dbg_qp(qp, "invalid max_rd_atomic %d > %d\n", 451 attr->max_rd_atomic, 452 rxe->attr.max_qp_rd_atom); 453 goto err1; 454 } 455 } 456 457 if (mask & IB_QP_TIMEOUT) { 458 if (attr->timeout > 31) { 459 rxe_dbg_qp(qp, "invalid timeout %d > 31\n", 460 attr->timeout); 461 goto err1; 462 } 463 } 464 465 return 0; 466 467 err1: 468 return -EINVAL; 469 } 470 471 /* move the qp to the reset state */ 472 static void rxe_qp_reset(struct rxe_qp *qp) 473 { 474 /* stop tasks from running */ 475 rxe_disable_task(&qp->resp.task); 476 477 /* stop request/comp */ 478 if (qp->sq.queue) { 479 if (qp_type(qp) == IB_QPT_RC) 480 rxe_disable_task(&qp->comp.task); 481 rxe_disable_task(&qp->req.task); 482 } 483 484 /* move qp to the reset state */ 485 qp->req.state = QP_STATE_RESET; 486 qp->comp.state = QP_STATE_RESET; 487 qp->resp.state = QP_STATE_RESET; 488 489 /* let state machines reset themselves drain work and packet queues 490 * etc. 491 */ 492 __rxe_do_task(&qp->resp.task); 493 494 if (qp->sq.queue) { 495 __rxe_do_task(&qp->comp.task); 496 __rxe_do_task(&qp->req.task); 497 rxe_queue_reset(qp->sq.queue); 498 } 499 500 /* cleanup attributes */ 501 atomic_set(&qp->ssn, 0); 502 qp->req.opcode = -1; 503 qp->req.need_retry = 0; 504 qp->req.wait_for_rnr_timer = 0; 505 qp->req.noack_pkts = 0; 506 qp->resp.msn = 0; 507 qp->resp.opcode = -1; 508 qp->resp.drop_msg = 0; 509 qp->resp.goto_error = 0; 510 qp->resp.sent_psn_nak = 0; 511 512 if (qp->resp.mr) { 513 rxe_put(qp->resp.mr); 514 qp->resp.mr = NULL; 515 } 516 517 cleanup_rd_atomic_resources(qp); 518 519 /* reenable tasks */ 520 rxe_enable_task(&qp->resp.task); 521 522 if (qp->sq.queue) { 523 if (qp_type(qp) == IB_QPT_RC) 524 rxe_enable_task(&qp->comp.task); 525 526 rxe_enable_task(&qp->req.task); 527 } 528 } 529 530 /* drain the send queue */ 531 static void rxe_qp_drain(struct rxe_qp *qp) 532 { 533 if (qp->sq.queue) { 534 if (qp->req.state != QP_STATE_DRAINED) { 535 qp->req.state = QP_STATE_DRAIN; 536 if (qp_type(qp) == IB_QPT_RC) 537 rxe_sched_task(&qp->comp.task); 538 else 539 __rxe_do_task(&qp->comp.task); 540 rxe_sched_task(&qp->req.task); 541 } 542 } 543 } 544 545 /* move the qp to the error state */ 546 void rxe_qp_error(struct rxe_qp *qp) 547 { 548 qp->req.state = QP_STATE_ERROR; 549 qp->resp.state = QP_STATE_ERROR; 550 qp->comp.state = QP_STATE_ERROR; 551 qp->attr.qp_state = IB_QPS_ERR; 552 553 /* drain work and packet queues */ 554 rxe_sched_task(&qp->resp.task); 555 556 if (qp_type(qp) == IB_QPT_RC) 557 rxe_sched_task(&qp->comp.task); 558 else 559 __rxe_do_task(&qp->comp.task); 560 rxe_sched_task(&qp->req.task); 561 } 562 563 /* called by the modify qp verb */ 564 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask, 565 struct ib_udata *udata) 566 { 567 int err; 568 569 if (mask & IB_QP_MAX_QP_RD_ATOMIC) { 570 int max_rd_atomic = attr->max_rd_atomic ? 571 roundup_pow_of_two(attr->max_rd_atomic) : 0; 572 573 qp->attr.max_rd_atomic = max_rd_atomic; 574 atomic_set(&qp->req.rd_atomic, max_rd_atomic); 575 } 576 577 if (mask & IB_QP_MAX_DEST_RD_ATOMIC) { 578 int max_dest_rd_atomic = attr->max_dest_rd_atomic ? 579 roundup_pow_of_two(attr->max_dest_rd_atomic) : 0; 580 581 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic; 582 583 free_rd_atomic_resources(qp); 584 585 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic); 586 if (err) 587 return err; 588 } 589 590 if (mask & IB_QP_CUR_STATE) 591 qp->attr.cur_qp_state = attr->qp_state; 592 593 if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY) 594 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify; 595 596 if (mask & IB_QP_ACCESS_FLAGS) 597 qp->attr.qp_access_flags = attr->qp_access_flags; 598 599 if (mask & IB_QP_PKEY_INDEX) 600 qp->attr.pkey_index = attr->pkey_index; 601 602 if (mask & IB_QP_PORT) 603 qp->attr.port_num = attr->port_num; 604 605 if (mask & IB_QP_QKEY) 606 qp->attr.qkey = attr->qkey; 607 608 if (mask & IB_QP_AV) 609 rxe_init_av(&attr->ah_attr, &qp->pri_av); 610 611 if (mask & IB_QP_ALT_PATH) { 612 rxe_init_av(&attr->alt_ah_attr, &qp->alt_av); 613 qp->attr.alt_port_num = attr->alt_port_num; 614 qp->attr.alt_pkey_index = attr->alt_pkey_index; 615 qp->attr.alt_timeout = attr->alt_timeout; 616 } 617 618 if (mask & IB_QP_PATH_MTU) { 619 qp->attr.path_mtu = attr->path_mtu; 620 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu); 621 } 622 623 if (mask & IB_QP_TIMEOUT) { 624 qp->attr.timeout = attr->timeout; 625 if (attr->timeout == 0) { 626 qp->qp_timeout_jiffies = 0; 627 } else { 628 /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */ 629 int j = nsecs_to_jiffies(4096ULL << attr->timeout); 630 631 qp->qp_timeout_jiffies = j ? j : 1; 632 } 633 } 634 635 if (mask & IB_QP_RETRY_CNT) { 636 qp->attr.retry_cnt = attr->retry_cnt; 637 qp->comp.retry_cnt = attr->retry_cnt; 638 rxe_dbg_qp(qp, "set retry count = %d\n", attr->retry_cnt); 639 } 640 641 if (mask & IB_QP_RNR_RETRY) { 642 qp->attr.rnr_retry = attr->rnr_retry; 643 qp->comp.rnr_retry = attr->rnr_retry; 644 rxe_dbg_qp(qp, "set rnr retry count = %d\n", attr->rnr_retry); 645 } 646 647 if (mask & IB_QP_RQ_PSN) { 648 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK); 649 qp->resp.psn = qp->attr.rq_psn; 650 rxe_dbg_qp(qp, "set resp psn = 0x%x\n", qp->resp.psn); 651 } 652 653 if (mask & IB_QP_MIN_RNR_TIMER) { 654 qp->attr.min_rnr_timer = attr->min_rnr_timer; 655 rxe_dbg_qp(qp, "set min rnr timer = 0x%x\n", 656 attr->min_rnr_timer); 657 } 658 659 if (mask & IB_QP_SQ_PSN) { 660 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK); 661 qp->req.psn = qp->attr.sq_psn; 662 qp->comp.psn = qp->attr.sq_psn; 663 rxe_dbg_qp(qp, "set req psn = 0x%x\n", qp->req.psn); 664 } 665 666 if (mask & IB_QP_PATH_MIG_STATE) 667 qp->attr.path_mig_state = attr->path_mig_state; 668 669 if (mask & IB_QP_DEST_QPN) 670 qp->attr.dest_qp_num = attr->dest_qp_num; 671 672 if (mask & IB_QP_STATE) { 673 qp->attr.qp_state = attr->qp_state; 674 675 switch (attr->qp_state) { 676 case IB_QPS_RESET: 677 rxe_dbg_qp(qp, "state -> RESET\n"); 678 rxe_qp_reset(qp); 679 break; 680 681 case IB_QPS_INIT: 682 rxe_dbg_qp(qp, "state -> INIT\n"); 683 qp->req.state = QP_STATE_INIT; 684 qp->resp.state = QP_STATE_INIT; 685 qp->comp.state = QP_STATE_INIT; 686 break; 687 688 case IB_QPS_RTR: 689 rxe_dbg_qp(qp, "state -> RTR\n"); 690 qp->resp.state = QP_STATE_READY; 691 break; 692 693 case IB_QPS_RTS: 694 rxe_dbg_qp(qp, "state -> RTS\n"); 695 qp->req.state = QP_STATE_READY; 696 qp->comp.state = QP_STATE_READY; 697 break; 698 699 case IB_QPS_SQD: 700 rxe_dbg_qp(qp, "state -> SQD\n"); 701 rxe_qp_drain(qp); 702 break; 703 704 case IB_QPS_SQE: 705 rxe_dbg_qp(qp, "state -> SQE !!?\n"); 706 /* Not possible from modify_qp. */ 707 break; 708 709 case IB_QPS_ERR: 710 rxe_dbg_qp(qp, "state -> ERR\n"); 711 rxe_qp_error(qp); 712 break; 713 } 714 } 715 716 return 0; 717 } 718 719 /* called by the query qp verb */ 720 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask) 721 { 722 *attr = qp->attr; 723 724 attr->rq_psn = qp->resp.psn; 725 attr->sq_psn = qp->req.psn; 726 727 attr->cap.max_send_wr = qp->sq.max_wr; 728 attr->cap.max_send_sge = qp->sq.max_sge; 729 attr->cap.max_inline_data = qp->sq.max_inline; 730 731 if (!qp->srq) { 732 attr->cap.max_recv_wr = qp->rq.max_wr; 733 attr->cap.max_recv_sge = qp->rq.max_sge; 734 } 735 736 rxe_av_to_attr(&qp->pri_av, &attr->ah_attr); 737 rxe_av_to_attr(&qp->alt_av, &attr->alt_ah_attr); 738 739 if (qp->req.state == QP_STATE_DRAIN) { 740 attr->sq_draining = 1; 741 /* applications that get this state 742 * typically spin on it. yield the 743 * processor 744 */ 745 cond_resched(); 746 } else { 747 attr->sq_draining = 0; 748 } 749 750 rxe_dbg_qp(qp, "attr->sq_draining = %d\n", attr->sq_draining); 751 752 return 0; 753 } 754 755 int rxe_qp_chk_destroy(struct rxe_qp *qp) 756 { 757 /* See IBA o10-2.2.3 758 * An attempt to destroy a QP while attached to a mcast group 759 * will fail immediately. 760 */ 761 if (atomic_read(&qp->mcg_num)) { 762 rxe_dbg_qp(qp, "Attempt to destroy while attached to multicast group\n"); 763 return -EBUSY; 764 } 765 766 return 0; 767 } 768 769 /* called when the last reference to the qp is dropped */ 770 static void rxe_qp_do_cleanup(struct work_struct *work) 771 { 772 struct rxe_qp *qp = container_of(work, typeof(*qp), cleanup_work.work); 773 774 qp->valid = 0; 775 qp->qp_timeout_jiffies = 0; 776 rxe_cleanup_task(&qp->resp.task); 777 778 if (qp_type(qp) == IB_QPT_RC) { 779 del_timer_sync(&qp->retrans_timer); 780 del_timer_sync(&qp->rnr_nak_timer); 781 } 782 783 rxe_cleanup_task(&qp->req.task); 784 rxe_cleanup_task(&qp->comp.task); 785 786 /* flush out any receive wr's or pending requests */ 787 if (qp->req.task.func) 788 __rxe_do_task(&qp->req.task); 789 790 if (qp->sq.queue) { 791 __rxe_do_task(&qp->comp.task); 792 __rxe_do_task(&qp->req.task); 793 } 794 795 if (qp->sq.queue) 796 rxe_queue_cleanup(qp->sq.queue); 797 798 if (qp->srq) 799 rxe_put(qp->srq); 800 801 if (qp->rq.queue) 802 rxe_queue_cleanup(qp->rq.queue); 803 804 if (qp->scq) { 805 atomic_dec(&qp->scq->num_wq); 806 rxe_put(qp->scq); 807 } 808 809 if (qp->rcq) { 810 atomic_dec(&qp->rcq->num_wq); 811 rxe_put(qp->rcq); 812 } 813 814 if (qp->pd) 815 rxe_put(qp->pd); 816 817 if (qp->resp.mr) 818 rxe_put(qp->resp.mr); 819 820 free_rd_atomic_resources(qp); 821 822 if (qp->sk) { 823 if (qp_type(qp) == IB_QPT_RC) 824 sk_dst_reset(qp->sk->sk); 825 826 kernel_sock_shutdown(qp->sk, SHUT_RDWR); 827 sock_release(qp->sk); 828 } 829 } 830 831 /* called when the last reference to the qp is dropped */ 832 void rxe_qp_cleanup(struct rxe_pool_elem *elem) 833 { 834 struct rxe_qp *qp = container_of(elem, typeof(*qp), elem); 835 836 execute_in_process_context(rxe_qp_do_cleanup, &qp->cleanup_work); 837 } 838