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_dev(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_dev(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_dev(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_dev(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_dev(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_dev(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_dev(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_dev(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 skb_queue_head_init(&qp->req_pkts); 180 skb_queue_head_init(&qp->resp_pkts); 181 182 atomic_set(&qp->ssn, 0); 183 atomic_set(&qp->skb_out, 0); 184 } 185 186 static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp, 187 struct ib_qp_init_attr *init, struct ib_udata *udata, 188 struct rxe_create_qp_resp __user *uresp) 189 { 190 int err; 191 int wqe_size; 192 enum queue_type type; 193 194 err = sock_create_kern(&init_net, AF_INET, SOCK_DGRAM, 0, &qp->sk); 195 if (err < 0) 196 return err; 197 qp->sk->sk->sk_user_data = qp; 198 199 /* pick a source UDP port number for this QP based on 200 * the source QPN. this spreads traffic for different QPs 201 * across different NIC RX queues (while using a single 202 * flow for a given QP to maintain packet order). 203 * the port number must be in the Dynamic Ports range 204 * (0xc000 - 0xffff). 205 */ 206 qp->src_port = RXE_ROCE_V2_SPORT + (hash_32(qp_num(qp), 14) & 0x3fff); 207 qp->sq.max_wr = init->cap.max_send_wr; 208 209 /* These caps are limited by rxe_qp_chk_cap() done by the caller */ 210 wqe_size = max_t(int, init->cap.max_send_sge * sizeof(struct ib_sge), 211 init->cap.max_inline_data); 212 qp->sq.max_sge = init->cap.max_send_sge = 213 wqe_size / sizeof(struct ib_sge); 214 qp->sq.max_inline = init->cap.max_inline_data = wqe_size; 215 wqe_size += sizeof(struct rxe_send_wqe); 216 217 type = QUEUE_TYPE_FROM_CLIENT; 218 qp->sq.queue = rxe_queue_init(rxe, &qp->sq.max_wr, 219 wqe_size, type); 220 if (!qp->sq.queue) 221 return -ENOMEM; 222 223 err = do_mmap_info(rxe, uresp ? &uresp->sq_mi : NULL, udata, 224 qp->sq.queue->buf, qp->sq.queue->buf_size, 225 &qp->sq.queue->ip); 226 227 if (err) { 228 vfree(qp->sq.queue->buf); 229 kfree(qp->sq.queue); 230 qp->sq.queue = NULL; 231 return err; 232 } 233 234 qp->req.wqe_index = queue_get_producer(qp->sq.queue, 235 QUEUE_TYPE_FROM_CLIENT); 236 237 qp->req.opcode = -1; 238 qp->comp.opcode = -1; 239 240 rxe_init_task(&qp->req.task, qp, rxe_requester); 241 rxe_init_task(&qp->comp.task, qp, rxe_completer); 242 243 qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */ 244 if (init->qp_type == IB_QPT_RC) { 245 timer_setup(&qp->rnr_nak_timer, rnr_nak_timer, 0); 246 timer_setup(&qp->retrans_timer, retransmit_timer, 0); 247 } 248 return 0; 249 } 250 251 static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp, 252 struct ib_qp_init_attr *init, 253 struct ib_udata *udata, 254 struct rxe_create_qp_resp __user *uresp) 255 { 256 int err; 257 int wqe_size; 258 enum queue_type type; 259 260 if (!qp->srq) { 261 qp->rq.max_wr = init->cap.max_recv_wr; 262 qp->rq.max_sge = init->cap.max_recv_sge; 263 264 wqe_size = rcv_wqe_size(qp->rq.max_sge); 265 266 type = QUEUE_TYPE_FROM_CLIENT; 267 qp->rq.queue = rxe_queue_init(rxe, &qp->rq.max_wr, 268 wqe_size, type); 269 if (!qp->rq.queue) 270 return -ENOMEM; 271 272 err = do_mmap_info(rxe, uresp ? &uresp->rq_mi : NULL, udata, 273 qp->rq.queue->buf, qp->rq.queue->buf_size, 274 &qp->rq.queue->ip); 275 if (err) { 276 vfree(qp->rq.queue->buf); 277 kfree(qp->rq.queue); 278 qp->rq.queue = NULL; 279 return err; 280 } 281 } 282 283 rxe_init_task(&qp->resp.task, qp, rxe_responder); 284 285 qp->resp.opcode = OPCODE_NONE; 286 qp->resp.msn = 0; 287 288 return 0; 289 } 290 291 /* called by the create qp verb */ 292 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd, 293 struct ib_qp_init_attr *init, 294 struct rxe_create_qp_resp __user *uresp, 295 struct ib_pd *ibpd, 296 struct ib_udata *udata) 297 { 298 int err; 299 struct rxe_cq *rcq = to_rcq(init->recv_cq); 300 struct rxe_cq *scq = to_rcq(init->send_cq); 301 struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL; 302 unsigned long flags; 303 304 rxe_get(pd); 305 rxe_get(rcq); 306 rxe_get(scq); 307 if (srq) 308 rxe_get(srq); 309 310 qp->pd = pd; 311 qp->rcq = rcq; 312 qp->scq = scq; 313 qp->srq = srq; 314 315 atomic_inc(&rcq->num_wq); 316 atomic_inc(&scq->num_wq); 317 318 rxe_qp_init_misc(rxe, qp, init); 319 320 err = rxe_qp_init_req(rxe, qp, init, udata, uresp); 321 if (err) 322 goto err1; 323 324 err = rxe_qp_init_resp(rxe, qp, init, udata, uresp); 325 if (err) 326 goto err2; 327 328 spin_lock_irqsave(&qp->state_lock, flags); 329 qp->attr.qp_state = IB_QPS_RESET; 330 qp->valid = 1; 331 spin_unlock_irqrestore(&qp->state_lock, flags); 332 333 return 0; 334 335 err2: 336 rxe_queue_cleanup(qp->sq.queue); 337 qp->sq.queue = NULL; 338 err1: 339 atomic_dec(&rcq->num_wq); 340 atomic_dec(&scq->num_wq); 341 342 qp->pd = NULL; 343 qp->rcq = NULL; 344 qp->scq = NULL; 345 qp->srq = NULL; 346 347 if (srq) 348 rxe_put(srq); 349 rxe_put(scq); 350 rxe_put(rcq); 351 rxe_put(pd); 352 353 return err; 354 } 355 356 /* called by the query qp verb */ 357 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init) 358 { 359 init->event_handler = qp->ibqp.event_handler; 360 init->qp_context = qp->ibqp.qp_context; 361 init->send_cq = qp->ibqp.send_cq; 362 init->recv_cq = qp->ibqp.recv_cq; 363 init->srq = qp->ibqp.srq; 364 365 init->cap.max_send_wr = qp->sq.max_wr; 366 init->cap.max_send_sge = qp->sq.max_sge; 367 init->cap.max_inline_data = qp->sq.max_inline; 368 369 if (!qp->srq) { 370 init->cap.max_recv_wr = qp->rq.max_wr; 371 init->cap.max_recv_sge = qp->rq.max_sge; 372 } 373 374 init->sq_sig_type = qp->sq_sig_type; 375 376 init->qp_type = qp->ibqp.qp_type; 377 init->port_num = 1; 378 379 return 0; 380 } 381 382 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp, 383 struct ib_qp_attr *attr, int mask) 384 { 385 if (mask & IB_QP_PORT) { 386 if (!rdma_is_port_valid(&rxe->ib_dev, attr->port_num)) { 387 rxe_dbg_qp(qp, "invalid port %d\n", attr->port_num); 388 goto err1; 389 } 390 } 391 392 if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq)) 393 goto err1; 394 395 if (mask & IB_QP_ACCESS_FLAGS) { 396 if (!(qp_type(qp) == IB_QPT_RC || qp_type(qp) == IB_QPT_UC)) 397 goto err1; 398 if (attr->qp_access_flags & ~RXE_ACCESS_SUPPORTED_QP) 399 goto err1; 400 } 401 402 if (mask & IB_QP_AV && rxe_av_chk_attr(qp, &attr->ah_attr)) 403 goto err1; 404 405 if (mask & IB_QP_ALT_PATH) { 406 if (rxe_av_chk_attr(qp, &attr->alt_ah_attr)) 407 goto err1; 408 if (!rdma_is_port_valid(&rxe->ib_dev, attr->alt_port_num)) { 409 rxe_dbg_qp(qp, "invalid alt port %d\n", attr->alt_port_num); 410 goto err1; 411 } 412 if (attr->alt_timeout > 31) { 413 rxe_dbg_qp(qp, "invalid alt timeout %d > 31\n", 414 attr->alt_timeout); 415 goto err1; 416 } 417 } 418 419 if (mask & IB_QP_PATH_MTU) { 420 struct rxe_port *port = &rxe->port; 421 422 enum ib_mtu max_mtu = port->attr.max_mtu; 423 enum ib_mtu mtu = attr->path_mtu; 424 425 if (mtu > max_mtu) { 426 rxe_dbg_qp(qp, "invalid mtu (%d) > (%d)\n", 427 ib_mtu_enum_to_int(mtu), 428 ib_mtu_enum_to_int(max_mtu)); 429 goto err1; 430 } 431 } 432 433 if (mask & IB_QP_MAX_QP_RD_ATOMIC) { 434 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) { 435 rxe_dbg_qp(qp, "invalid max_rd_atomic %d > %d\n", 436 attr->max_rd_atomic, 437 rxe->attr.max_qp_rd_atom); 438 goto err1; 439 } 440 } 441 442 if (mask & IB_QP_TIMEOUT) { 443 if (attr->timeout > 31) { 444 rxe_dbg_qp(qp, "invalid timeout %d > 31\n", 445 attr->timeout); 446 goto err1; 447 } 448 } 449 450 return 0; 451 452 err1: 453 return -EINVAL; 454 } 455 456 /* move the qp to the reset state */ 457 static void rxe_qp_reset(struct rxe_qp *qp) 458 { 459 /* stop tasks from running */ 460 rxe_disable_task(&qp->resp.task); 461 rxe_disable_task(&qp->comp.task); 462 rxe_disable_task(&qp->req.task); 463 464 /* drain work and packet queuesc */ 465 rxe_requester(qp); 466 rxe_completer(qp); 467 rxe_responder(qp); 468 469 if (qp->rq.queue) 470 rxe_queue_reset(qp->rq.queue); 471 if (qp->sq.queue) 472 rxe_queue_reset(qp->sq.queue); 473 474 /* cleanup attributes */ 475 atomic_set(&qp->ssn, 0); 476 qp->req.opcode = -1; 477 qp->req.need_retry = 0; 478 qp->req.wait_for_rnr_timer = 0; 479 qp->req.noack_pkts = 0; 480 qp->resp.msn = 0; 481 qp->resp.opcode = -1; 482 qp->resp.drop_msg = 0; 483 qp->resp.goto_error = 0; 484 qp->resp.sent_psn_nak = 0; 485 486 if (qp->resp.mr) { 487 rxe_put(qp->resp.mr); 488 qp->resp.mr = NULL; 489 } 490 491 cleanup_rd_atomic_resources(qp); 492 493 /* reenable tasks */ 494 rxe_enable_task(&qp->resp.task); 495 rxe_enable_task(&qp->comp.task); 496 rxe_enable_task(&qp->req.task); 497 } 498 499 /* move the qp to the error state */ 500 void rxe_qp_error(struct rxe_qp *qp) 501 { 502 unsigned long flags; 503 504 spin_lock_irqsave(&qp->state_lock, flags); 505 qp->attr.qp_state = IB_QPS_ERR; 506 507 /* drain work and packet queues */ 508 rxe_sched_task(&qp->resp.task); 509 rxe_sched_task(&qp->comp.task); 510 rxe_sched_task(&qp->req.task); 511 spin_unlock_irqrestore(&qp->state_lock, flags); 512 } 513 514 static void rxe_qp_sqd(struct rxe_qp *qp, struct ib_qp_attr *attr, 515 int mask) 516 { 517 unsigned long flags; 518 519 spin_lock_irqsave(&qp->state_lock, flags); 520 qp->attr.sq_draining = 1; 521 rxe_sched_task(&qp->comp.task); 522 rxe_sched_task(&qp->req.task); 523 spin_unlock_irqrestore(&qp->state_lock, flags); 524 } 525 526 /* caller should hold qp->state_lock */ 527 static int __qp_chk_state(struct rxe_qp *qp, struct ib_qp_attr *attr, 528 int mask) 529 { 530 enum ib_qp_state cur_state; 531 enum ib_qp_state new_state; 532 533 cur_state = (mask & IB_QP_CUR_STATE) ? 534 attr->cur_qp_state : qp->attr.qp_state; 535 new_state = (mask & IB_QP_STATE) ? 536 attr->qp_state : cur_state; 537 538 if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask)) 539 return -EINVAL; 540 541 if (mask & IB_QP_STATE && cur_state == IB_QPS_SQD) { 542 if (qp->attr.sq_draining && new_state != IB_QPS_ERR) 543 return -EINVAL; 544 } 545 546 return 0; 547 } 548 549 static const char *const qps2str[] = { 550 [IB_QPS_RESET] = "RESET", 551 [IB_QPS_INIT] = "INIT", 552 [IB_QPS_RTR] = "RTR", 553 [IB_QPS_RTS] = "RTS", 554 [IB_QPS_SQD] = "SQD", 555 [IB_QPS_SQE] = "SQE", 556 [IB_QPS_ERR] = "ERR", 557 }; 558 559 /* called by the modify qp verb */ 560 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask, 561 struct ib_udata *udata) 562 { 563 int err; 564 565 if (mask & IB_QP_CUR_STATE) 566 qp->attr.cur_qp_state = attr->qp_state; 567 568 if (mask & IB_QP_STATE) { 569 unsigned long flags; 570 571 spin_lock_irqsave(&qp->state_lock, flags); 572 err = __qp_chk_state(qp, attr, mask); 573 if (!err) { 574 qp->attr.qp_state = attr->qp_state; 575 rxe_dbg_qp(qp, "state -> %s\n", 576 qps2str[attr->qp_state]); 577 } 578 spin_unlock_irqrestore(&qp->state_lock, flags); 579 580 if (err) 581 return err; 582 583 switch (attr->qp_state) { 584 case IB_QPS_RESET: 585 rxe_qp_reset(qp); 586 break; 587 case IB_QPS_SQD: 588 rxe_qp_sqd(qp, attr, mask); 589 break; 590 case IB_QPS_ERR: 591 rxe_qp_error(qp); 592 break; 593 default: 594 break; 595 } 596 } 597 598 if (mask & IB_QP_MAX_QP_RD_ATOMIC) { 599 int max_rd_atomic = attr->max_rd_atomic ? 600 roundup_pow_of_two(attr->max_rd_atomic) : 0; 601 602 qp->attr.max_rd_atomic = max_rd_atomic; 603 atomic_set(&qp->req.rd_atomic, max_rd_atomic); 604 } 605 606 if (mask & IB_QP_MAX_DEST_RD_ATOMIC) { 607 int max_dest_rd_atomic = attr->max_dest_rd_atomic ? 608 roundup_pow_of_two(attr->max_dest_rd_atomic) : 0; 609 610 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic; 611 612 free_rd_atomic_resources(qp); 613 614 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic); 615 if (err) 616 return err; 617 } 618 619 if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY) 620 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify; 621 622 if (mask & IB_QP_ACCESS_FLAGS) 623 qp->attr.qp_access_flags = attr->qp_access_flags; 624 625 if (mask & IB_QP_PKEY_INDEX) 626 qp->attr.pkey_index = attr->pkey_index; 627 628 if (mask & IB_QP_PORT) 629 qp->attr.port_num = attr->port_num; 630 631 if (mask & IB_QP_QKEY) 632 qp->attr.qkey = attr->qkey; 633 634 if (mask & IB_QP_AV) 635 rxe_init_av(&attr->ah_attr, &qp->pri_av); 636 637 if (mask & IB_QP_ALT_PATH) { 638 rxe_init_av(&attr->alt_ah_attr, &qp->alt_av); 639 qp->attr.alt_port_num = attr->alt_port_num; 640 qp->attr.alt_pkey_index = attr->alt_pkey_index; 641 qp->attr.alt_timeout = attr->alt_timeout; 642 } 643 644 if (mask & IB_QP_PATH_MTU) { 645 qp->attr.path_mtu = attr->path_mtu; 646 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu); 647 } 648 649 if (mask & IB_QP_TIMEOUT) { 650 qp->attr.timeout = attr->timeout; 651 if (attr->timeout == 0) { 652 qp->qp_timeout_jiffies = 0; 653 } else { 654 /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */ 655 int j = nsecs_to_jiffies(4096ULL << attr->timeout); 656 657 qp->qp_timeout_jiffies = j ? j : 1; 658 } 659 } 660 661 if (mask & IB_QP_RETRY_CNT) { 662 qp->attr.retry_cnt = attr->retry_cnt; 663 qp->comp.retry_cnt = attr->retry_cnt; 664 rxe_dbg_qp(qp, "set retry count = %d\n", attr->retry_cnt); 665 } 666 667 if (mask & IB_QP_RNR_RETRY) { 668 qp->attr.rnr_retry = attr->rnr_retry; 669 qp->comp.rnr_retry = attr->rnr_retry; 670 rxe_dbg_qp(qp, "set rnr retry count = %d\n", attr->rnr_retry); 671 } 672 673 if (mask & IB_QP_RQ_PSN) { 674 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK); 675 qp->resp.psn = qp->attr.rq_psn; 676 rxe_dbg_qp(qp, "set resp psn = 0x%x\n", qp->resp.psn); 677 } 678 679 if (mask & IB_QP_MIN_RNR_TIMER) { 680 qp->attr.min_rnr_timer = attr->min_rnr_timer; 681 rxe_dbg_qp(qp, "set min rnr timer = 0x%x\n", 682 attr->min_rnr_timer); 683 } 684 685 if (mask & IB_QP_SQ_PSN) { 686 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK); 687 qp->req.psn = qp->attr.sq_psn; 688 qp->comp.psn = qp->attr.sq_psn; 689 rxe_dbg_qp(qp, "set req psn = 0x%x\n", qp->req.psn); 690 } 691 692 if (mask & IB_QP_PATH_MIG_STATE) 693 qp->attr.path_mig_state = attr->path_mig_state; 694 695 if (mask & IB_QP_DEST_QPN) 696 qp->attr.dest_qp_num = attr->dest_qp_num; 697 698 return 0; 699 } 700 701 /* called by the query qp verb */ 702 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask) 703 { 704 unsigned long flags; 705 706 *attr = qp->attr; 707 708 attr->rq_psn = qp->resp.psn; 709 attr->sq_psn = qp->req.psn; 710 711 attr->cap.max_send_wr = qp->sq.max_wr; 712 attr->cap.max_send_sge = qp->sq.max_sge; 713 attr->cap.max_inline_data = qp->sq.max_inline; 714 715 if (!qp->srq) { 716 attr->cap.max_recv_wr = qp->rq.max_wr; 717 attr->cap.max_recv_sge = qp->rq.max_sge; 718 } 719 720 rxe_av_to_attr(&qp->pri_av, &attr->ah_attr); 721 rxe_av_to_attr(&qp->alt_av, &attr->alt_ah_attr); 722 723 /* Applications that get this state typically spin on it. 724 * Yield the processor 725 */ 726 spin_lock_irqsave(&qp->state_lock, flags); 727 if (qp->attr.sq_draining) { 728 spin_unlock_irqrestore(&qp->state_lock, flags); 729 cond_resched(); 730 } else { 731 spin_unlock_irqrestore(&qp->state_lock, flags); 732 } 733 734 return 0; 735 } 736 737 int rxe_qp_chk_destroy(struct rxe_qp *qp) 738 { 739 /* See IBA o10-2.2.3 740 * An attempt to destroy a QP while attached to a mcast group 741 * will fail immediately. 742 */ 743 if (atomic_read(&qp->mcg_num)) { 744 rxe_dbg_qp(qp, "Attempt to destroy while attached to multicast group\n"); 745 return -EBUSY; 746 } 747 748 return 0; 749 } 750 751 /* called when the last reference to the qp is dropped */ 752 static void rxe_qp_do_cleanup(struct work_struct *work) 753 { 754 struct rxe_qp *qp = container_of(work, typeof(*qp), cleanup_work.work); 755 unsigned long flags; 756 757 spin_lock_irqsave(&qp->state_lock, flags); 758 qp->valid = 0; 759 spin_unlock_irqrestore(&qp->state_lock, flags); 760 qp->qp_timeout_jiffies = 0; 761 762 if (qp_type(qp) == IB_QPT_RC) { 763 del_timer_sync(&qp->retrans_timer); 764 del_timer_sync(&qp->rnr_nak_timer); 765 } 766 767 if (qp->resp.task.func) 768 rxe_cleanup_task(&qp->resp.task); 769 770 if (qp->req.task.func) 771 rxe_cleanup_task(&qp->req.task); 772 773 if (qp->comp.task.func) 774 rxe_cleanup_task(&qp->comp.task); 775 776 /* flush out any receive wr's or pending requests */ 777 rxe_requester(qp); 778 rxe_completer(qp); 779 rxe_responder(qp); 780 781 if (qp->sq.queue) 782 rxe_queue_cleanup(qp->sq.queue); 783 784 if (qp->srq) 785 rxe_put(qp->srq); 786 787 if (qp->rq.queue) 788 rxe_queue_cleanup(qp->rq.queue); 789 790 if (qp->scq) { 791 atomic_dec(&qp->scq->num_wq); 792 rxe_put(qp->scq); 793 } 794 795 if (qp->rcq) { 796 atomic_dec(&qp->rcq->num_wq); 797 rxe_put(qp->rcq); 798 } 799 800 if (qp->pd) 801 rxe_put(qp->pd); 802 803 if (qp->resp.mr) 804 rxe_put(qp->resp.mr); 805 806 free_rd_atomic_resources(qp); 807 808 if (qp->sk) { 809 if (qp_type(qp) == IB_QPT_RC) 810 sk_dst_reset(qp->sk->sk); 811 812 kernel_sock_shutdown(qp->sk, SHUT_RDWR); 813 sock_release(qp->sk); 814 } 815 } 816 817 /* called when the last reference to the qp is dropped */ 818 void rxe_qp_cleanup(struct rxe_pool_elem *elem) 819 { 820 struct rxe_qp *qp = container_of(elem, typeof(*qp), elem); 821 822 execute_in_process_context(rxe_qp_do_cleanup, &qp->cleanup_work); 823 } 824