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_debug("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 pr_debug("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 pr_debug("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 pr_debug("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 pr_debug("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 pr_debug("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_debug("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_debug("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->req.task.state_lock); 176 spin_lock_init(&qp->resp.task.state_lock); 177 spin_lock_init(&qp->comp.task.state_lock); 178 179 spin_lock_init(&qp->sq.sq_lock); 180 spin_lock_init(&qp->rq.producer_lock); 181 spin_lock_init(&qp->rq.consumer_lock); 182 183 atomic_set(&qp->ssn, 0); 184 atomic_set(&qp->skb_out, 0); 185 } 186 187 static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp, 188 struct ib_qp_init_attr *init, struct ib_udata *udata, 189 struct rxe_create_qp_resp __user *uresp) 190 { 191 int err; 192 int wqe_size; 193 enum queue_type type; 194 195 err = sock_create_kern(&init_net, AF_INET, SOCK_DGRAM, 0, &qp->sk); 196 if (err < 0) 197 return err; 198 qp->sk->sk->sk_user_data = qp; 199 200 /* pick a source UDP port number for this QP based on 201 * the source QPN. this spreads traffic for different QPs 202 * across different NIC RX queues (while using a single 203 * flow for a given QP to maintain packet order). 204 * the port number must be in the Dynamic Ports range 205 * (0xc000 - 0xffff). 206 */ 207 qp->src_port = RXE_ROCE_V2_SPORT + (hash_32(qp_num(qp), 14) & 0x3fff); 208 qp->sq.max_wr = init->cap.max_send_wr; 209 210 /* These caps are limited by rxe_qp_chk_cap() done by the caller */ 211 wqe_size = max_t(int, init->cap.max_send_sge * sizeof(struct ib_sge), 212 init->cap.max_inline_data); 213 qp->sq.max_sge = init->cap.max_send_sge = 214 wqe_size / sizeof(struct ib_sge); 215 qp->sq.max_inline = init->cap.max_inline_data = wqe_size; 216 wqe_size += sizeof(struct rxe_send_wqe); 217 218 type = QUEUE_TYPE_FROM_CLIENT; 219 qp->sq.queue = rxe_queue_init(rxe, &qp->sq.max_wr, 220 wqe_size, type); 221 if (!qp->sq.queue) 222 return -ENOMEM; 223 224 err = do_mmap_info(rxe, uresp ? &uresp->sq_mi : NULL, udata, 225 qp->sq.queue->buf, qp->sq.queue->buf_size, 226 &qp->sq.queue->ip); 227 228 if (err) { 229 vfree(qp->sq.queue->buf); 230 kfree(qp->sq.queue); 231 qp->sq.queue = NULL; 232 return err; 233 } 234 235 qp->req.wqe_index = queue_get_producer(qp->sq.queue, 236 QUEUE_TYPE_FROM_CLIENT); 237 238 qp->req.state = QP_STATE_RESET; 239 qp->comp.state = QP_STATE_RESET; 240 qp->req.opcode = -1; 241 qp->comp.opcode = -1; 242 243 skb_queue_head_init(&qp->req_pkts); 244 245 rxe_init_task(&qp->req.task, qp, 246 rxe_requester, "req"); 247 rxe_init_task(&qp->comp.task, qp, 248 rxe_completer, "comp"); 249 250 qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */ 251 if (init->qp_type == IB_QPT_RC) { 252 timer_setup(&qp->rnr_nak_timer, rnr_nak_timer, 0); 253 timer_setup(&qp->retrans_timer, retransmit_timer, 0); 254 } 255 return 0; 256 } 257 258 static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp, 259 struct ib_qp_init_attr *init, 260 struct ib_udata *udata, 261 struct rxe_create_qp_resp __user *uresp) 262 { 263 int err; 264 int wqe_size; 265 enum queue_type type; 266 267 if (!qp->srq) { 268 qp->rq.max_wr = init->cap.max_recv_wr; 269 qp->rq.max_sge = init->cap.max_recv_sge; 270 271 wqe_size = rcv_wqe_size(qp->rq.max_sge); 272 273 pr_debug("qp#%d max_wr = %d, max_sge = %d, wqe_size = %d\n", 274 qp_num(qp), qp->rq.max_wr, qp->rq.max_sge, wqe_size); 275 276 type = QUEUE_TYPE_FROM_CLIENT; 277 qp->rq.queue = rxe_queue_init(rxe, &qp->rq.max_wr, 278 wqe_size, type); 279 if (!qp->rq.queue) 280 return -ENOMEM; 281 282 err = do_mmap_info(rxe, uresp ? &uresp->rq_mi : NULL, udata, 283 qp->rq.queue->buf, qp->rq.queue->buf_size, 284 &qp->rq.queue->ip); 285 if (err) { 286 vfree(qp->rq.queue->buf); 287 kfree(qp->rq.queue); 288 qp->rq.queue = NULL; 289 return err; 290 } 291 } 292 293 skb_queue_head_init(&qp->resp_pkts); 294 295 rxe_init_task(&qp->resp.task, qp, 296 rxe_responder, "resp"); 297 298 qp->resp.opcode = OPCODE_NONE; 299 qp->resp.msn = 0; 300 qp->resp.state = QP_STATE_RESET; 301 302 return 0; 303 } 304 305 /* called by the create qp verb */ 306 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd, 307 struct ib_qp_init_attr *init, 308 struct rxe_create_qp_resp __user *uresp, 309 struct ib_pd *ibpd, 310 struct ib_udata *udata) 311 { 312 int err; 313 struct rxe_cq *rcq = to_rcq(init->recv_cq); 314 struct rxe_cq *scq = to_rcq(init->send_cq); 315 struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL; 316 317 rxe_get(pd); 318 rxe_get(rcq); 319 rxe_get(scq); 320 if (srq) 321 rxe_get(srq); 322 323 qp->pd = pd; 324 qp->rcq = rcq; 325 qp->scq = scq; 326 qp->srq = srq; 327 328 atomic_inc(&rcq->num_wq); 329 atomic_inc(&scq->num_wq); 330 331 rxe_qp_init_misc(rxe, qp, init); 332 333 err = rxe_qp_init_req(rxe, qp, init, udata, uresp); 334 if (err) 335 goto err1; 336 337 err = rxe_qp_init_resp(rxe, qp, init, udata, uresp); 338 if (err) 339 goto err2; 340 341 qp->attr.qp_state = IB_QPS_RESET; 342 qp->valid = 1; 343 344 return 0; 345 346 err2: 347 rxe_queue_cleanup(qp->sq.queue); 348 qp->sq.queue = NULL; 349 err1: 350 atomic_dec(&rcq->num_wq); 351 atomic_dec(&scq->num_wq); 352 353 qp->pd = NULL; 354 qp->rcq = NULL; 355 qp->scq = NULL; 356 qp->srq = NULL; 357 358 if (srq) 359 rxe_put(srq); 360 rxe_put(scq); 361 rxe_put(rcq); 362 rxe_put(pd); 363 364 return err; 365 } 366 367 /* called by the query qp verb */ 368 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init) 369 { 370 init->event_handler = qp->ibqp.event_handler; 371 init->qp_context = qp->ibqp.qp_context; 372 init->send_cq = qp->ibqp.send_cq; 373 init->recv_cq = qp->ibqp.recv_cq; 374 init->srq = qp->ibqp.srq; 375 376 init->cap.max_send_wr = qp->sq.max_wr; 377 init->cap.max_send_sge = qp->sq.max_sge; 378 init->cap.max_inline_data = qp->sq.max_inline; 379 380 if (!qp->srq) { 381 init->cap.max_recv_wr = qp->rq.max_wr; 382 init->cap.max_recv_sge = qp->rq.max_sge; 383 } 384 385 init->sq_sig_type = qp->sq_sig_type; 386 387 init->qp_type = qp->ibqp.qp_type; 388 init->port_num = 1; 389 390 return 0; 391 } 392 393 /* called by the modify qp verb, this routine checks all the parameters before 394 * making any changes 395 */ 396 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp, 397 struct ib_qp_attr *attr, int mask) 398 { 399 enum ib_qp_state cur_state = (mask & IB_QP_CUR_STATE) ? 400 attr->cur_qp_state : qp->attr.qp_state; 401 enum ib_qp_state new_state = (mask & IB_QP_STATE) ? 402 attr->qp_state : cur_state; 403 404 if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask)) { 405 pr_debug("invalid mask or state for qp\n"); 406 goto err1; 407 } 408 409 if (mask & IB_QP_STATE) { 410 if (cur_state == IB_QPS_SQD) { 411 if (qp->req.state == QP_STATE_DRAIN && 412 new_state != IB_QPS_ERR) 413 goto err1; 414 } 415 } 416 417 if (mask & IB_QP_PORT) { 418 if (!rdma_is_port_valid(&rxe->ib_dev, attr->port_num)) { 419 pr_debug("invalid port %d\n", attr->port_num); 420 goto err1; 421 } 422 } 423 424 if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq)) 425 goto err1; 426 427 if (mask & IB_QP_AV && rxe_av_chk_attr(rxe, &attr->ah_attr)) 428 goto err1; 429 430 if (mask & IB_QP_ALT_PATH) { 431 if (rxe_av_chk_attr(rxe, &attr->alt_ah_attr)) 432 goto err1; 433 if (!rdma_is_port_valid(&rxe->ib_dev, attr->alt_port_num)) { 434 pr_debug("invalid alt port %d\n", attr->alt_port_num); 435 goto err1; 436 } 437 if (attr->alt_timeout > 31) { 438 pr_debug("invalid QP alt timeout %d > 31\n", 439 attr->alt_timeout); 440 goto err1; 441 } 442 } 443 444 if (mask & IB_QP_PATH_MTU) { 445 struct rxe_port *port = &rxe->port; 446 447 enum ib_mtu max_mtu = port->attr.max_mtu; 448 enum ib_mtu mtu = attr->path_mtu; 449 450 if (mtu > max_mtu) { 451 pr_debug("invalid mtu (%d) > (%d)\n", 452 ib_mtu_enum_to_int(mtu), 453 ib_mtu_enum_to_int(max_mtu)); 454 goto err1; 455 } 456 } 457 458 if (mask & IB_QP_MAX_QP_RD_ATOMIC) { 459 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) { 460 pr_debug("invalid max_rd_atomic %d > %d\n", 461 attr->max_rd_atomic, 462 rxe->attr.max_qp_rd_atom); 463 goto err1; 464 } 465 } 466 467 if (mask & IB_QP_TIMEOUT) { 468 if (attr->timeout > 31) { 469 pr_debug("invalid QP timeout %d > 31\n", attr->timeout); 470 goto err1; 471 } 472 } 473 474 return 0; 475 476 err1: 477 return -EINVAL; 478 } 479 480 /* move the qp to the reset state */ 481 static void rxe_qp_reset(struct rxe_qp *qp) 482 { 483 /* stop tasks from running */ 484 rxe_disable_task(&qp->resp.task); 485 486 /* stop request/comp */ 487 if (qp->sq.queue) { 488 if (qp_type(qp) == IB_QPT_RC) 489 rxe_disable_task(&qp->comp.task); 490 rxe_disable_task(&qp->req.task); 491 } 492 493 /* move qp to the reset state */ 494 qp->req.state = QP_STATE_RESET; 495 qp->comp.state = QP_STATE_RESET; 496 qp->resp.state = QP_STATE_RESET; 497 498 /* let state machines reset themselves drain work and packet queues 499 * etc. 500 */ 501 __rxe_do_task(&qp->resp.task); 502 503 if (qp->sq.queue) { 504 __rxe_do_task(&qp->comp.task); 505 __rxe_do_task(&qp->req.task); 506 rxe_queue_reset(qp->sq.queue); 507 } 508 509 /* cleanup attributes */ 510 atomic_set(&qp->ssn, 0); 511 qp->req.opcode = -1; 512 qp->req.need_retry = 0; 513 qp->req.wait_for_rnr_timer = 0; 514 qp->req.noack_pkts = 0; 515 qp->resp.msn = 0; 516 qp->resp.opcode = -1; 517 qp->resp.drop_msg = 0; 518 qp->resp.goto_error = 0; 519 qp->resp.sent_psn_nak = 0; 520 521 if (qp->resp.mr) { 522 rxe_put(qp->resp.mr); 523 qp->resp.mr = NULL; 524 } 525 526 cleanup_rd_atomic_resources(qp); 527 528 /* reenable tasks */ 529 rxe_enable_task(&qp->resp.task); 530 531 if (qp->sq.queue) { 532 if (qp_type(qp) == IB_QPT_RC) 533 rxe_enable_task(&qp->comp.task); 534 535 rxe_enable_task(&qp->req.task); 536 } 537 } 538 539 /* drain the send queue */ 540 static void rxe_qp_drain(struct rxe_qp *qp) 541 { 542 if (qp->sq.queue) { 543 if (qp->req.state != QP_STATE_DRAINED) { 544 qp->req.state = QP_STATE_DRAIN; 545 if (qp_type(qp) == IB_QPT_RC) 546 rxe_run_task(&qp->comp.task, 1); 547 else 548 __rxe_do_task(&qp->comp.task); 549 rxe_run_task(&qp->req.task, 1); 550 } 551 } 552 } 553 554 /* move the qp to the error state */ 555 void rxe_qp_error(struct rxe_qp *qp) 556 { 557 qp->req.state = QP_STATE_ERROR; 558 qp->resp.state = QP_STATE_ERROR; 559 qp->comp.state = QP_STATE_ERROR; 560 qp->attr.qp_state = IB_QPS_ERR; 561 562 /* drain work and packet queues */ 563 rxe_run_task(&qp->resp.task, 1); 564 565 if (qp_type(qp) == IB_QPT_RC) 566 rxe_run_task(&qp->comp.task, 1); 567 else 568 __rxe_do_task(&qp->comp.task); 569 rxe_run_task(&qp->req.task, 1); 570 } 571 572 /* called by the modify qp verb */ 573 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask, 574 struct ib_udata *udata) 575 { 576 int err; 577 578 if (mask & IB_QP_MAX_QP_RD_ATOMIC) { 579 int max_rd_atomic = attr->max_rd_atomic ? 580 roundup_pow_of_two(attr->max_rd_atomic) : 0; 581 582 qp->attr.max_rd_atomic = max_rd_atomic; 583 atomic_set(&qp->req.rd_atomic, max_rd_atomic); 584 } 585 586 if (mask & IB_QP_MAX_DEST_RD_ATOMIC) { 587 int max_dest_rd_atomic = attr->max_dest_rd_atomic ? 588 roundup_pow_of_two(attr->max_dest_rd_atomic) : 0; 589 590 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic; 591 592 free_rd_atomic_resources(qp); 593 594 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic); 595 if (err) 596 return err; 597 } 598 599 if (mask & IB_QP_CUR_STATE) 600 qp->attr.cur_qp_state = attr->qp_state; 601 602 if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY) 603 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify; 604 605 if (mask & IB_QP_ACCESS_FLAGS) 606 qp->attr.qp_access_flags = attr->qp_access_flags; 607 608 if (mask & IB_QP_PKEY_INDEX) 609 qp->attr.pkey_index = attr->pkey_index; 610 611 if (mask & IB_QP_PORT) 612 qp->attr.port_num = attr->port_num; 613 614 if (mask & IB_QP_QKEY) 615 qp->attr.qkey = attr->qkey; 616 617 if (mask & IB_QP_AV) 618 rxe_init_av(&attr->ah_attr, &qp->pri_av); 619 620 if (mask & IB_QP_ALT_PATH) { 621 rxe_init_av(&attr->alt_ah_attr, &qp->alt_av); 622 qp->attr.alt_port_num = attr->alt_port_num; 623 qp->attr.alt_pkey_index = attr->alt_pkey_index; 624 qp->attr.alt_timeout = attr->alt_timeout; 625 } 626 627 if (mask & IB_QP_PATH_MTU) { 628 qp->attr.path_mtu = attr->path_mtu; 629 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu); 630 } 631 632 if (mask & IB_QP_TIMEOUT) { 633 qp->attr.timeout = attr->timeout; 634 if (attr->timeout == 0) { 635 qp->qp_timeout_jiffies = 0; 636 } else { 637 /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */ 638 int j = nsecs_to_jiffies(4096ULL << attr->timeout); 639 640 qp->qp_timeout_jiffies = j ? j : 1; 641 } 642 } 643 644 if (mask & IB_QP_RETRY_CNT) { 645 qp->attr.retry_cnt = attr->retry_cnt; 646 qp->comp.retry_cnt = attr->retry_cnt; 647 pr_debug("qp#%d set retry count = %d\n", qp_num(qp), 648 attr->retry_cnt); 649 } 650 651 if (mask & IB_QP_RNR_RETRY) { 652 qp->attr.rnr_retry = attr->rnr_retry; 653 qp->comp.rnr_retry = attr->rnr_retry; 654 pr_debug("qp#%d set rnr retry count = %d\n", qp_num(qp), 655 attr->rnr_retry); 656 } 657 658 if (mask & IB_QP_RQ_PSN) { 659 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK); 660 qp->resp.psn = qp->attr.rq_psn; 661 pr_debug("qp#%d set resp psn = 0x%x\n", qp_num(qp), 662 qp->resp.psn); 663 } 664 665 if (mask & IB_QP_MIN_RNR_TIMER) { 666 qp->attr.min_rnr_timer = attr->min_rnr_timer; 667 pr_debug("qp#%d set min rnr timer = 0x%x\n", qp_num(qp), 668 attr->min_rnr_timer); 669 } 670 671 if (mask & IB_QP_SQ_PSN) { 672 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK); 673 qp->req.psn = qp->attr.sq_psn; 674 qp->comp.psn = qp->attr.sq_psn; 675 pr_debug("qp#%d set req psn = 0x%x\n", qp_num(qp), qp->req.psn); 676 } 677 678 if (mask & IB_QP_PATH_MIG_STATE) 679 qp->attr.path_mig_state = attr->path_mig_state; 680 681 if (mask & IB_QP_DEST_QPN) 682 qp->attr.dest_qp_num = attr->dest_qp_num; 683 684 if (mask & IB_QP_STATE) { 685 qp->attr.qp_state = attr->qp_state; 686 687 switch (attr->qp_state) { 688 case IB_QPS_RESET: 689 pr_debug("qp#%d state -> RESET\n", qp_num(qp)); 690 rxe_qp_reset(qp); 691 break; 692 693 case IB_QPS_INIT: 694 pr_debug("qp#%d state -> INIT\n", qp_num(qp)); 695 qp->req.state = QP_STATE_INIT; 696 qp->resp.state = QP_STATE_INIT; 697 qp->comp.state = QP_STATE_INIT; 698 break; 699 700 case IB_QPS_RTR: 701 pr_debug("qp#%d state -> RTR\n", qp_num(qp)); 702 qp->resp.state = QP_STATE_READY; 703 break; 704 705 case IB_QPS_RTS: 706 pr_debug("qp#%d state -> RTS\n", qp_num(qp)); 707 qp->req.state = QP_STATE_READY; 708 qp->comp.state = QP_STATE_READY; 709 break; 710 711 case IB_QPS_SQD: 712 pr_debug("qp#%d state -> SQD\n", qp_num(qp)); 713 rxe_qp_drain(qp); 714 break; 715 716 case IB_QPS_SQE: 717 pr_warn("qp#%d state -> SQE !!?\n", qp_num(qp)); 718 /* Not possible from modify_qp. */ 719 break; 720 721 case IB_QPS_ERR: 722 pr_debug("qp#%d state -> ERR\n", qp_num(qp)); 723 rxe_qp_error(qp); 724 break; 725 } 726 } 727 728 return 0; 729 } 730 731 /* called by the query qp verb */ 732 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask) 733 { 734 *attr = qp->attr; 735 736 attr->rq_psn = qp->resp.psn; 737 attr->sq_psn = qp->req.psn; 738 739 attr->cap.max_send_wr = qp->sq.max_wr; 740 attr->cap.max_send_sge = qp->sq.max_sge; 741 attr->cap.max_inline_data = qp->sq.max_inline; 742 743 if (!qp->srq) { 744 attr->cap.max_recv_wr = qp->rq.max_wr; 745 attr->cap.max_recv_sge = qp->rq.max_sge; 746 } 747 748 rxe_av_to_attr(&qp->pri_av, &attr->ah_attr); 749 rxe_av_to_attr(&qp->alt_av, &attr->alt_ah_attr); 750 751 if (qp->req.state == QP_STATE_DRAIN) { 752 attr->sq_draining = 1; 753 /* applications that get this state 754 * typically spin on it. yield the 755 * processor 756 */ 757 cond_resched(); 758 } else { 759 attr->sq_draining = 0; 760 } 761 762 pr_debug("attr->sq_draining = %d\n", attr->sq_draining); 763 764 return 0; 765 } 766 767 int rxe_qp_chk_destroy(struct rxe_qp *qp) 768 { 769 /* See IBA o10-2.2.3 770 * An attempt to destroy a QP while attached to a mcast group 771 * will fail immediately. 772 */ 773 if (atomic_read(&qp->mcg_num)) { 774 pr_debug("Attempt to destroy QP while attached to multicast group\n"); 775 return -EBUSY; 776 } 777 778 return 0; 779 } 780 781 /* called when the last reference to the qp is dropped */ 782 static void rxe_qp_do_cleanup(struct work_struct *work) 783 { 784 struct rxe_qp *qp = container_of(work, typeof(*qp), cleanup_work.work); 785 786 qp->valid = 0; 787 qp->qp_timeout_jiffies = 0; 788 rxe_cleanup_task(&qp->resp.task); 789 790 if (qp_type(qp) == IB_QPT_RC) { 791 del_timer_sync(&qp->retrans_timer); 792 del_timer_sync(&qp->rnr_nak_timer); 793 } 794 795 rxe_cleanup_task(&qp->req.task); 796 rxe_cleanup_task(&qp->comp.task); 797 798 /* flush out any receive wr's or pending requests */ 799 if (qp->req.task.func) 800 __rxe_do_task(&qp->req.task); 801 802 if (qp->sq.queue) { 803 __rxe_do_task(&qp->comp.task); 804 __rxe_do_task(&qp->req.task); 805 } 806 807 if (qp->sq.queue) 808 rxe_queue_cleanup(qp->sq.queue); 809 810 if (qp->srq) 811 rxe_put(qp->srq); 812 813 if (qp->rq.queue) 814 rxe_queue_cleanup(qp->rq.queue); 815 816 if (qp->scq) { 817 atomic_dec(&qp->scq->num_wq); 818 rxe_put(qp->scq); 819 } 820 821 if (qp->rcq) { 822 atomic_dec(&qp->rcq->num_wq); 823 rxe_put(qp->rcq); 824 } 825 826 if (qp->pd) 827 rxe_put(qp->pd); 828 829 if (qp->resp.mr) 830 rxe_put(qp->resp.mr); 831 832 if (qp_type(qp) == IB_QPT_RC) 833 sk_dst_reset(qp->sk->sk); 834 835 free_rd_atomic_resources(qp); 836 837 if (qp->sk) { 838 kernel_sock_shutdown(qp->sk, SHUT_RDWR); 839 sock_release(qp->sk); 840 } 841 } 842 843 /* called when the last reference to the qp is dropped */ 844 void rxe_qp_cleanup(struct rxe_pool_elem *elem) 845 { 846 struct rxe_qp *qp = container_of(elem, typeof(*qp), elem); 847 848 execute_in_process_context(rxe_qp_do_cleanup, &qp->cleanup_work); 849 } 850