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 18static 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 55err1: 56 return -EINVAL; 57} 58 59int 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 if (!init->recv_cq || !init->send_cq) { 66 pr_warn("missing cq\n"); 67 goto err1; 68 } 69 70 if (rxe_qp_chk_cap(rxe, cap, !!init->srq)) 71 goto err1; 72 73 if (init->qp_type == IB_QPT_SMI || init->qp_type == IB_QPT_GSI) { 74 if (!rdma_is_port_valid(&rxe->ib_dev, port_num)) { 75 pr_warn("invalid port = %d\n", port_num); 76 goto err1; 77 } 78 79 port = &rxe->port; 80 81 if (init->qp_type == IB_QPT_SMI && port->qp_smi_index) { 82 pr_warn("SMI QP exists for port %d\n", port_num); 83 goto err1; 84 } 85 86 if (init->qp_type == IB_QPT_GSI && port->qp_gsi_index) { 87 pr_warn("GSI QP exists for port %d\n", port_num); 88 goto err1; 89 } 90 } 91 92 return 0; 93 94err1: 95 return -EINVAL; 96} 97 98static int alloc_rd_atomic_resources(struct rxe_qp *qp, unsigned int n) 99{ 100 qp->resp.res_head = 0; 101 qp->resp.res_tail = 0; 102 qp->resp.resources = kcalloc(n, sizeof(struct resp_res), GFP_KERNEL); 103 104 if (!qp->resp.resources) 105 return -ENOMEM; 106 107 return 0; 108} 109 110static void free_rd_atomic_resources(struct rxe_qp *qp) 111{ 112 if (qp->resp.resources) { 113 int i; 114 115 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) { 116 struct resp_res *res = &qp->resp.resources[i]; 117 118 free_rd_atomic_resource(qp, res); 119 } 120 kfree(qp->resp.resources); 121 qp->resp.resources = NULL; 122 } 123} 124 125void free_rd_atomic_resource(struct rxe_qp *qp, struct resp_res *res) 126{ 127 if (res->type == RXE_ATOMIC_MASK) { 128 kfree_skb(res->atomic.skb); 129 } else if (res->type == RXE_READ_MASK) { 130 if (res->read.mr) 131 rxe_drop_ref(res->read.mr); 132 } 133 res->type = 0; 134} 135 136static void cleanup_rd_atomic_resources(struct rxe_qp *qp) 137{ 138 int i; 139 struct resp_res *res; 140 141 if (qp->resp.resources) { 142 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) { 143 res = &qp->resp.resources[i]; 144 free_rd_atomic_resource(qp, res); 145 } 146 } 147} 148 149static void rxe_qp_init_misc(struct rxe_dev *rxe, struct rxe_qp *qp, 150 struct ib_qp_init_attr *init) 151{ 152 struct rxe_port *port; 153 u32 qpn; 154 155 qp->sq_sig_type = init->sq_sig_type; 156 qp->attr.path_mtu = 1; 157 qp->mtu = ib_mtu_enum_to_int(qp->attr.path_mtu); 158 159 qpn = qp->pelem.index; 160 port = &rxe->port; 161 162 switch (init->qp_type) { 163 case IB_QPT_SMI: 164 qp->ibqp.qp_num = 0; 165 port->qp_smi_index = qpn; 166 qp->attr.port_num = init->port_num; 167 break; 168 169 case IB_QPT_GSI: 170 qp->ibqp.qp_num = 1; 171 port->qp_gsi_index = qpn; 172 qp->attr.port_num = init->port_num; 173 break; 174 175 default: 176 qp->ibqp.qp_num = qpn; 177 break; 178 } 179 180 INIT_LIST_HEAD(&qp->grp_list); 181 182 skb_queue_head_init(&qp->send_pkts); 183 184 spin_lock_init(&qp->grp_lock); 185 spin_lock_init(&qp->state_lock); 186 187 spin_lock_init(&qp->req.task.state_lock); 188 spin_lock_init(&qp->resp.task.state_lock); 189 spin_lock_init(&qp->comp.task.state_lock); 190 191 spin_lock_init(&qp->sq.sq_lock); 192 spin_lock_init(&qp->rq.producer_lock); 193 spin_lock_init(&qp->rq.consumer_lock); 194 195 skb_queue_head_init(&qp->req_pkts); 196 skb_queue_head_init(&qp->resp_pkts); 197 198 atomic_set(&qp->ssn, 0); 199 atomic_set(&qp->skb_out, 0); 200} 201 202static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp, 203 struct ib_qp_init_attr *init, struct ib_udata *udata, 204 struct rxe_create_qp_resp __user *uresp) 205{ 206 int err; 207 int wqe_size; 208 209 err = sock_create_kern(&init_net, AF_INET, SOCK_DGRAM, 0, &qp->sk); 210 if (err < 0) 211 return err; 212 qp->sk->sk->sk_user_data = qp; 213 214 /* pick a source UDP port number for this QP based on 215 * the source QPN. this spreads traffic for different QPs 216 * across different NIC RX queues (while using a single 217 * flow for a given QP to maintain packet order). 218 * the port number must be in the Dynamic Ports range 219 * (0xc000 - 0xffff). 220 */ 221 qp->src_port = RXE_ROCE_V2_SPORT + 222 (hash_32_generic(qp_num(qp), 14) & 0x3fff); 223 qp->sq.max_wr = init->cap.max_send_wr; 224 225 /* These caps are limited by rxe_qp_chk_cap() done by the caller */ 226 wqe_size = max_t(int, init->cap.max_send_sge * sizeof(struct ib_sge), 227 init->cap.max_inline_data); 228 qp->sq.max_sge = init->cap.max_send_sge = 229 wqe_size / sizeof(struct ib_sge); 230 qp->sq.max_inline = init->cap.max_inline_data = wqe_size; 231 wqe_size += sizeof(struct rxe_send_wqe); 232 233 qp->sq.queue = rxe_queue_init(rxe, &qp->sq.max_wr, wqe_size); 234 if (!qp->sq.queue) 235 return -ENOMEM; 236 237 err = do_mmap_info(rxe, uresp ? &uresp->sq_mi : NULL, udata, 238 qp->sq.queue->buf, qp->sq.queue->buf_size, 239 &qp->sq.queue->ip); 240 241 if (err) { 242 vfree(qp->sq.queue->buf); 243 kfree(qp->sq.queue); 244 qp->sq.queue = NULL; 245 return err; 246 } 247 248 qp->req.wqe_index = producer_index(qp->sq.queue); 249 qp->req.state = QP_STATE_RESET; 250 qp->req.opcode = -1; 251 qp->comp.opcode = -1; 252 253 rxe_init_task(&qp->req.task, qp, rxe_requester); 254 rxe_init_task(&qp->comp.task, qp, rxe_completer); 255 256 qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */ 257 if (init->qp_type == IB_QPT_RC) { 258 timer_setup(&qp->rnr_nak_timer, rnr_nak_timer, 0); 259 timer_setup(&qp->retrans_timer, retransmit_timer, 0); 260 } 261 return 0; 262} 263 264static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp, 265 struct ib_qp_init_attr *init, 266 struct ib_udata *udata, 267 struct rxe_create_qp_resp __user *uresp) 268{ 269 int err; 270 int wqe_size; 271 272 if (!qp->srq) { 273 qp->rq.max_wr = init->cap.max_recv_wr; 274 qp->rq.max_sge = init->cap.max_recv_sge; 275 276 wqe_size = rcv_wqe_size(qp->rq.max_sge); 277 278 pr_debug("qp#%d max_wr = %d, max_sge = %d, wqe_size = %d\n", 279 qp_num(qp), qp->rq.max_wr, qp->rq.max_sge, wqe_size); 280 281 qp->rq.queue = rxe_queue_init(rxe, 282 &qp->rq.max_wr, 283 wqe_size); 284 if (!qp->rq.queue) 285 return -ENOMEM; 286 287 err = do_mmap_info(rxe, uresp ? &uresp->rq_mi : NULL, udata, 288 qp->rq.queue->buf, qp->rq.queue->buf_size, 289 &qp->rq.queue->ip); 290 if (err) { 291 vfree(qp->rq.queue->buf); 292 kfree(qp->rq.queue); 293 qp->rq.queue = NULL; 294 return err; 295 } 296 } 297 298 rxe_init_task(&qp->resp.task, qp, rxe_responder); 299 300 qp->resp.opcode = OPCODE_NONE; 301 qp->resp.msn = 0; 302 qp->resp.state = QP_STATE_RESET; 303 304 return 0; 305} 306 307/* called by the create qp verb */ 308int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd, 309 struct ib_qp_init_attr *init, 310 struct rxe_create_qp_resp __user *uresp, 311 struct ib_pd *ibpd, 312 struct ib_udata *udata) 313{ 314 int err; 315 struct rxe_cq *rcq = to_rcq(init->recv_cq); 316 struct rxe_cq *scq = to_rcq(init->send_cq); 317 struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL; 318 319 rxe_add_ref(pd); 320 rxe_add_ref(rcq); 321 rxe_add_ref(scq); 322 if (srq) 323 rxe_add_ref(srq); 324 325 qp->pd = pd; 326 qp->rcq = rcq; 327 qp->scq = scq; 328 qp->srq = srq; 329 330 rxe_qp_init_misc(rxe, qp, init); 331 332 err = rxe_qp_init_req(rxe, qp, init, udata, uresp); 333 if (err) 334 goto err1; 335 336 err = rxe_qp_init_resp(rxe, qp, init, udata, uresp); 337 if (err) 338 goto err2; 339 340 qp->attr.qp_state = IB_QPS_RESET; 341 qp->valid = 1; 342 343 return 0; 344 345err2: 346 rxe_queue_cleanup(qp->sq.queue); 347err1: 348 qp->pd = NULL; 349 qp->rcq = NULL; 350 qp->scq = NULL; 351 qp->srq = NULL; 352 353 if (srq) 354 rxe_drop_ref(srq); 355 rxe_drop_ref(scq); 356 rxe_drop_ref(rcq); 357 rxe_drop_ref(pd); 358 359 return err; 360} 361 362/* called by the query qp verb */ 363int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init) 364{ 365 init->event_handler = qp->ibqp.event_handler; 366 init->qp_context = qp->ibqp.qp_context; 367 init->send_cq = qp->ibqp.send_cq; 368 init->recv_cq = qp->ibqp.recv_cq; 369 init->srq = qp->ibqp.srq; 370 371 init->cap.max_send_wr = qp->sq.max_wr; 372 init->cap.max_send_sge = qp->sq.max_sge; 373 init->cap.max_inline_data = qp->sq.max_inline; 374 375 if (!qp->srq) { 376 init->cap.max_recv_wr = qp->rq.max_wr; 377 init->cap.max_recv_sge = qp->rq.max_sge; 378 } 379 380 init->sq_sig_type = qp->sq_sig_type; 381 382 init->qp_type = qp->ibqp.qp_type; 383 init->port_num = 1; 384 385 return 0; 386} 387 388/* called by the modify qp verb, this routine checks all the parameters before 389 * making any changes 390 */ 391int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp, 392 struct ib_qp_attr *attr, int mask) 393{ 394 enum ib_qp_state cur_state = (mask & IB_QP_CUR_STATE) ? 395 attr->cur_qp_state : qp->attr.qp_state; 396 enum ib_qp_state new_state = (mask & IB_QP_STATE) ? 397 attr->qp_state : cur_state; 398 399 if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask)) { 400 pr_warn("invalid mask or state for qp\n"); 401 goto err1; 402 } 403 404 if (mask & IB_QP_STATE) { 405 if (cur_state == IB_QPS_SQD) { 406 if (qp->req.state == QP_STATE_DRAIN && 407 new_state != IB_QPS_ERR) 408 goto err1; 409 } 410 } 411 412 if (mask & IB_QP_PORT) { 413 if (!rdma_is_port_valid(&rxe->ib_dev, attr->port_num)) { 414 pr_warn("invalid port %d\n", attr->port_num); 415 goto err1; 416 } 417 } 418 419 if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq)) 420 goto err1; 421 422 if (mask & IB_QP_AV && rxe_av_chk_attr(rxe, &attr->ah_attr)) 423 goto err1; 424 425 if (mask & IB_QP_ALT_PATH) { 426 if (rxe_av_chk_attr(rxe, &attr->alt_ah_attr)) 427 goto err1; 428 if (!rdma_is_port_valid(&rxe->ib_dev, attr->alt_port_num)) { 429 pr_warn("invalid alt port %d\n", attr->alt_port_num); 430 goto err1; 431 } 432 if (attr->alt_timeout > 31) { 433 pr_warn("invalid QP alt timeout %d > 31\n", 434 attr->alt_timeout); 435 goto err1; 436 } 437 } 438 439 if (mask & IB_QP_PATH_MTU) { 440 struct rxe_port *port = &rxe->port; 441 442 enum ib_mtu max_mtu = port->attr.max_mtu; 443 enum ib_mtu mtu = attr->path_mtu; 444 445 if (mtu > max_mtu) { 446 pr_debug("invalid mtu (%d) > (%d)\n", 447 ib_mtu_enum_to_int(mtu), 448 ib_mtu_enum_to_int(max_mtu)); 449 goto err1; 450 } 451 } 452 453 if (mask & IB_QP_MAX_QP_RD_ATOMIC) { 454 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) { 455 pr_warn("invalid max_rd_atomic %d > %d\n", 456 attr->max_rd_atomic, 457 rxe->attr.max_qp_rd_atom); 458 goto err1; 459 } 460 } 461 462 if (mask & IB_QP_TIMEOUT) { 463 if (attr->timeout > 31) { 464 pr_warn("invalid QP timeout %d > 31\n", 465 attr->timeout); 466 goto err1; 467 } 468 } 469 470 return 0; 471 472err1: 473 return -EINVAL; 474} 475 476/* move the qp to the reset state */ 477static void rxe_qp_reset(struct rxe_qp *qp) 478{ 479 /* stop tasks from running */ 480 rxe_disable_task(&qp->resp.task); 481 482 /* stop request/comp */ 483 if (qp->sq.queue) { 484 if (qp_type(qp) == IB_QPT_RC) 485 rxe_disable_task(&qp->comp.task); 486 rxe_disable_task(&qp->req.task); 487 } 488 489 /* move qp to the reset state */ 490 qp->req.state = QP_STATE_RESET; 491 qp->resp.state = QP_STATE_RESET; 492 493 /* let state machines reset themselves drain work and packet queues 494 * etc. 495 */ 496 __rxe_do_task(&qp->resp.task); 497 498 if (qp->sq.queue) { 499 __rxe_do_task(&qp->comp.task); 500 __rxe_do_task(&qp->req.task); 501 rxe_queue_reset(qp->sq.queue); 502 } 503 504 /* cleanup attributes */ 505 atomic_set(&qp->ssn, 0); 506 qp->req.opcode = -1; 507 qp->req.need_retry = 0; 508 qp->req.noack_pkts = 0; 509 qp->resp.msn = 0; 510 qp->resp.opcode = -1; 511 qp->resp.drop_msg = 0; 512 qp->resp.goto_error = 0; 513 qp->resp.sent_psn_nak = 0; 514 515 if (qp->resp.mr) { 516 rxe_drop_ref(qp->resp.mr); 517 qp->resp.mr = NULL; 518 } 519 520 cleanup_rd_atomic_resources(qp); 521 522 /* reenable tasks */ 523 rxe_enable_task(&qp->resp.task); 524 525 if (qp->sq.queue) { 526 if (qp_type(qp) == IB_QPT_RC) 527 rxe_enable_task(&qp->comp.task); 528 529 rxe_enable_task(&qp->req.task); 530 } 531} 532 533/* drain the send queue */ 534static void rxe_qp_drain(struct rxe_qp *qp) 535{ 536 if (qp->sq.queue) { 537 if (qp->req.state != QP_STATE_DRAINED) { 538 qp->req.state = QP_STATE_DRAIN; 539 if (qp_type(qp) == IB_QPT_RC) 540 rxe_run_task(&qp->comp.task, 1); 541 else 542 __rxe_do_task(&qp->comp.task); 543 rxe_run_task(&qp->req.task, 1); 544 } 545 } 546} 547 548/* move the qp to the error state */ 549void rxe_qp_error(struct rxe_qp *qp) 550{ 551 qp->req.state = QP_STATE_ERROR; 552 qp->resp.state = QP_STATE_ERROR; 553 qp->attr.qp_state = IB_QPS_ERR; 554 555 /* drain work and packet queues */ 556 rxe_run_task(&qp->resp.task, 1); 557 558 if (qp_type(qp) == IB_QPT_RC) 559 rxe_run_task(&qp->comp.task, 1); 560 else 561 __rxe_do_task(&qp->comp.task); 562 rxe_run_task(&qp->req.task, 1); 563} 564 565/* called by the modify qp verb */ 566int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask, 567 struct ib_udata *udata) 568{ 569 int err; 570 571 if (mask & IB_QP_MAX_QP_RD_ATOMIC) { 572 int max_rd_atomic = attr->max_rd_atomic ? 573 roundup_pow_of_two(attr->max_rd_atomic) : 0; 574 575 qp->attr.max_rd_atomic = max_rd_atomic; 576 atomic_set(&qp->req.rd_atomic, max_rd_atomic); 577 } 578 579 if (mask & IB_QP_MAX_DEST_RD_ATOMIC) { 580 int max_dest_rd_atomic = attr->max_dest_rd_atomic ? 581 roundup_pow_of_two(attr->max_dest_rd_atomic) : 0; 582 583 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic; 584 585 free_rd_atomic_resources(qp); 586 587 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic); 588 if (err) 589 return err; 590 } 591 592 if (mask & IB_QP_CUR_STATE) 593 qp->attr.cur_qp_state = attr->qp_state; 594 595 if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY) 596 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify; 597 598 if (mask & IB_QP_ACCESS_FLAGS) 599 qp->attr.qp_access_flags = attr->qp_access_flags; 600 601 if (mask & IB_QP_PKEY_INDEX) 602 qp->attr.pkey_index = attr->pkey_index; 603 604 if (mask & IB_QP_PORT) 605 qp->attr.port_num = attr->port_num; 606 607 if (mask & IB_QP_QKEY) 608 qp->attr.qkey = attr->qkey; 609 610 if (mask & IB_QP_AV) 611 rxe_init_av(&attr->ah_attr, &qp->pri_av); 612 613 if (mask & IB_QP_ALT_PATH) { 614 rxe_init_av(&attr->alt_ah_attr, &qp->alt_av); 615 qp->attr.alt_port_num = attr->alt_port_num; 616 qp->attr.alt_pkey_index = attr->alt_pkey_index; 617 qp->attr.alt_timeout = attr->alt_timeout; 618 } 619 620 if (mask & IB_QP_PATH_MTU) { 621 qp->attr.path_mtu = attr->path_mtu; 622 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu); 623 } 624 625 if (mask & IB_QP_TIMEOUT) { 626 qp->attr.timeout = attr->timeout; 627 if (attr->timeout == 0) { 628 qp->qp_timeout_jiffies = 0; 629 } else { 630 /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */ 631 int j = nsecs_to_jiffies(4096ULL << attr->timeout); 632 633 qp->qp_timeout_jiffies = j ? j : 1; 634 } 635 } 636 637 if (mask & IB_QP_RETRY_CNT) { 638 qp->attr.retry_cnt = attr->retry_cnt; 639 qp->comp.retry_cnt = attr->retry_cnt; 640 pr_debug("qp#%d set retry count = %d\n", qp_num(qp), 641 attr->retry_cnt); 642 } 643 644 if (mask & IB_QP_RNR_RETRY) { 645 qp->attr.rnr_retry = attr->rnr_retry; 646 qp->comp.rnr_retry = attr->rnr_retry; 647 pr_debug("qp#%d set rnr retry count = %d\n", qp_num(qp), 648 attr->rnr_retry); 649 } 650 651 if (mask & IB_QP_RQ_PSN) { 652 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK); 653 qp->resp.psn = qp->attr.rq_psn; 654 pr_debug("qp#%d set resp psn = 0x%x\n", qp_num(qp), 655 qp->resp.psn); 656 } 657 658 if (mask & IB_QP_MIN_RNR_TIMER) { 659 qp->attr.min_rnr_timer = attr->min_rnr_timer; 660 pr_debug("qp#%d set min rnr timer = 0x%x\n", qp_num(qp), 661 attr->min_rnr_timer); 662 } 663 664 if (mask & IB_QP_SQ_PSN) { 665 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK); 666 qp->req.psn = qp->attr.sq_psn; 667 qp->comp.psn = qp->attr.sq_psn; 668 pr_debug("qp#%d set req psn = 0x%x\n", qp_num(qp), qp->req.psn); 669 } 670 671 if (mask & IB_QP_PATH_MIG_STATE) 672 qp->attr.path_mig_state = attr->path_mig_state; 673 674 if (mask & IB_QP_DEST_QPN) 675 qp->attr.dest_qp_num = attr->dest_qp_num; 676 677 if (mask & IB_QP_STATE) { 678 qp->attr.qp_state = attr->qp_state; 679 680 switch (attr->qp_state) { 681 case IB_QPS_RESET: 682 pr_debug("qp#%d state -> RESET\n", qp_num(qp)); 683 rxe_qp_reset(qp); 684 break; 685 686 case IB_QPS_INIT: 687 pr_debug("qp#%d state -> INIT\n", qp_num(qp)); 688 qp->req.state = QP_STATE_INIT; 689 qp->resp.state = QP_STATE_INIT; 690 break; 691 692 case IB_QPS_RTR: 693 pr_debug("qp#%d state -> RTR\n", qp_num(qp)); 694 qp->resp.state = QP_STATE_READY; 695 break; 696 697 case IB_QPS_RTS: 698 pr_debug("qp#%d state -> RTS\n", qp_num(qp)); 699 qp->req.state = QP_STATE_READY; 700 break; 701 702 case IB_QPS_SQD: 703 pr_debug("qp#%d state -> SQD\n", qp_num(qp)); 704 rxe_qp_drain(qp); 705 break; 706 707 case IB_QPS_SQE: 708 pr_warn("qp#%d state -> SQE !!?\n", qp_num(qp)); 709 /* Not possible from modify_qp. */ 710 break; 711 712 case IB_QPS_ERR: 713 pr_debug("qp#%d state -> ERR\n", qp_num(qp)); 714 rxe_qp_error(qp); 715 break; 716 } 717 } 718 719 return 0; 720} 721 722/* called by the query qp verb */ 723int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask) 724{ 725 *attr = qp->attr; 726 727 attr->rq_psn = qp->resp.psn; 728 attr->sq_psn = qp->req.psn; 729 730 attr->cap.max_send_wr = qp->sq.max_wr; 731 attr->cap.max_send_sge = qp->sq.max_sge; 732 attr->cap.max_inline_data = qp->sq.max_inline; 733 734 if (!qp->srq) { 735 attr->cap.max_recv_wr = qp->rq.max_wr; 736 attr->cap.max_recv_sge = qp->rq.max_sge; 737 } 738 739 rxe_av_to_attr(&qp->pri_av, &attr->ah_attr); 740 rxe_av_to_attr(&qp->alt_av, &attr->alt_ah_attr); 741 742 if (qp->req.state == QP_STATE_DRAIN) { 743 attr->sq_draining = 1; 744 /* applications that get this state 745 * typically spin on it. yield the 746 * processor 747 */ 748 cond_resched(); 749 } else { 750 attr->sq_draining = 0; 751 } 752 753 pr_debug("attr->sq_draining = %d\n", attr->sq_draining); 754 755 return 0; 756} 757 758/* called by the destroy qp verb */ 759void rxe_qp_destroy(struct rxe_qp *qp) 760{ 761 qp->valid = 0; 762 qp->qp_timeout_jiffies = 0; 763 rxe_cleanup_task(&qp->resp.task); 764 765 if (qp_type(qp) == IB_QPT_RC) { 766 del_timer_sync(&qp->retrans_timer); 767 del_timer_sync(&qp->rnr_nak_timer); 768 } 769 770 rxe_cleanup_task(&qp->req.task); 771 rxe_cleanup_task(&qp->comp.task); 772 773 /* flush out any receive wr's or pending requests */ 774 if (qp->req.task.func) 775 __rxe_do_task(&qp->req.task); 776 777 if (qp->sq.queue) { 778 __rxe_do_task(&qp->comp.task); 779 __rxe_do_task(&qp->req.task); 780 } 781} 782 783/* called when the last reference to the qp is dropped */ 784static void rxe_qp_do_cleanup(struct work_struct *work) 785{ 786 struct rxe_qp *qp = container_of(work, typeof(*qp), cleanup_work.work); 787 788 rxe_drop_all_mcast_groups(qp); 789 790 if (qp->sq.queue) 791 rxe_queue_cleanup(qp->sq.queue); 792 793 if (qp->srq) 794 rxe_drop_ref(qp->srq); 795 796 if (qp->rq.queue) 797 rxe_queue_cleanup(qp->rq.queue); 798 799 if (qp->scq) 800 rxe_drop_ref(qp->scq); 801 if (qp->rcq) 802 rxe_drop_ref(qp->rcq); 803 if (qp->pd) 804 rxe_drop_ref(qp->pd); 805 806 if (qp->resp.mr) { 807 rxe_drop_ref(qp->resp.mr); 808 qp->resp.mr = NULL; 809 } 810 811 free_rd_atomic_resources(qp); 812 813 if (qp->sk) { 814 if (qp_type(qp) == IB_QPT_RC) 815 sk_dst_reset(qp->sk->sk); 816 817 kernel_sock_shutdown(qp->sk, SHUT_RDWR); 818 sock_release(qp->sk); 819 } 820} 821 822/* called when the last reference to the qp is dropped */ 823void rxe_qp_cleanup(struct rxe_pool_entry *arg) 824{ 825 struct rxe_qp *qp = container_of(arg, typeof(*qp), pelem); 826 827 execute_in_process_context(rxe_qp_do_cleanup, &qp->cleanup_work); 828} 829